update: add leftbar to app

This are fixes to make the widget embedable

.github/workflows/pypi.yml

@@ -34,7 +34,7 @@ jobs:
       - name: Upload wheels
         uses: actions/upload-artifact@v4
         with:
-          name: wheels
+          name: wheels-${{ runner.os }}-${{ matrix.target }}
           path: bindings/python/dist
 
   windows:
@@ -58,7 +58,7 @@ jobs:
       - name: Upload wheels
         uses: actions/upload-artifact@v4
         with:
-          name: wheels
+          name: wheels-${{ runner.os }}-${{ matrix.target }}
           path: bindings/python/dist
 
   macos:
@@ -81,7 +81,7 @@ jobs:
       - name: Upload wheels
         uses: actions/upload-artifact@v4
         with:
-          name: wheels
+          name: wheels-${{ runner.os }}-${{ matrix.target }}
           path: bindings/python/dist
 
   sdist:
@@ -97,7 +97,7 @@ jobs:
       - name: Upload sdist
         uses: actions/upload-artifact@v4
         with:
-          name: wheels
+          name: wheels-${{ runner.os }}-sdist
           path: bindings/python/dist
 
   publish-to-test-pypi:
@@ -107,9 +107,8 @@ jobs:
     runs-on: ubuntu-latest
     needs: [linux, windows, macos, sdist]
     steps:
-      - uses: actions/download-artifact@v3
+      - uses: actions/download-artifact@v4
         with:
-          name: wheels
           path: bindings/python/
       - name: Publish distribution 📦 to Test PyPI
         uses: PyO3/maturin-action@v1
@@ -118,7 +117,7 @@ jobs:
           MATURIN_REPOSITORY_URL: "https://test.pypi.org/legacy/"
         with:
           command: upload
-          args: --skip-existing *
+          args: "--skip-existing **/*.whl"
           working-directory: bindings/python
 
   publish-pypi:
@@ -128,9 +127,8 @@ jobs:
     runs-on: ubuntu-latest
     needs: [linux, windows, macos, sdist]
     steps:
-      - uses: actions/download-artifact@v3
+      - uses: actions/download-artifact@v4
         with:
-          name: wheels
           path: bindings/python/
       - name: Publish distribution 📦 to PyPI
         uses: PyO3/maturin-action@v1
@@ -139,5 +137,5 @@ jobs:
           MATURIN_REPOSITORY_URL: "https://upload.pypi.org/legacy/"
         with:
           command: upload
-          args: --skip-existing *
+          args: "--skip-existing **/*.whl"
           working-directory: bindings/python

Cargo.lock

@@ -872,6 +872,12 @@ version = "0.19.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3cd14fd5e3b777a7422cca79358c57a8f6e3a703d9ac187448d0daf220c2407f"
 
+[[package]]
+name = "rustversion"
+version = "1.0.21"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8a0d197bd2c9dc6e53b84da9556a69ba4cdfab8619eb41a8bd1cc2027a0f6b1d"
+
 [[package]]
 name = "ryu"
 version = "1.0.17"
@@ -1081,23 +1087,24 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen"
-version = "0.2.92"
+version = "0.2.100"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4be2531df63900aeb2bca0daaaddec08491ee64ceecbee5076636a3b026795a8"
+checksum = "1edc8929d7499fc4e8f0be2262a241556cfc54a0bea223790e71446f2aab1ef5"
 dependencies = [
  "cfg-if",
+ "once_cell",
+ "rustversion",
  "wasm-bindgen-macro",
 ]
 
 [[package]]
 name = "wasm-bindgen-backend"
-version = "0.2.92"
+version = "0.2.100"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "614d787b966d3989fa7bb98a654e369c762374fd3213d212cfc0251257e747da"
+checksum = "2f0a0651a5c2bc21487bde11ee802ccaf4c51935d0d3d42a6101f98161700bc6"
 dependencies = [
  "bumpalo",
  "log",
- "once_cell",
  "proc-macro2",
  "quote",
  "syn",
@@ -1118,9 +1125,9 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-macro"
-version = "0.2.92"
+version = "0.2.100"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a1f8823de937b71b9460c0c34e25f3da88250760bec0ebac694b49997550d726"
+checksum = "7fe63fc6d09ed3792bd0897b314f53de8e16568c2b3f7982f468c0bf9bd0b407"
 dependencies = [
  "quote",
  "wasm-bindgen-macro-support",
@@ -1128,9 +1135,9 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-macro-support"
-version = "0.2.92"
+version = "0.2.100"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e94f17b526d0a461a191c78ea52bbce64071ed5c04c9ffe424dcb38f74171bb7"
+checksum = "8ae87ea40c9f689fc23f209965b6fb8a99ad69aeeb0231408be24920604395de"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -1141,9 +1148,12 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-shared"
-version = "0.2.92"
+version = "0.2.100"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "af190c94f2773fdb3729c55b007a722abb5384da03bc0986df4c289bf5567e96"
+checksum = "1a05d73b933a847d6cccdda8f838a22ff101ad9bf93e33684f39c1f5f0eece3d"
+dependencies = [
+ "unicode-ident",
+]
 
 [[package]]
 name = "wasm-bindgen-test"

base/src/actions.rs

@@ -1,5 +1,6 @@
 use crate::constants::{LAST_COLUMN, LAST_ROW};
-use crate::expressions::parser::stringify::DisplaceData;
+use crate::expressions::parser::stringify::{to_string, to_string_displaced, DisplaceData};
+use crate::expressions::types::CellReferenceRC;
 use crate::model::Model;
 
 // NOTE: There is a difference with Excel behaviour when deleting cells/rows/columns
@@ -8,16 +9,45 @@ use crate::model::Model;
 // I feel this is unimportant for now.
 
 impl Model {
+    fn shift_cell_formula(
+        &mut self,
+        sheet: u32,
+        row: i32,
+        column: i32,
+        displace_data: &DisplaceData,
+    ) -> Result<(), String> {
+        if let Some(f) = self
+            .workbook
+            .worksheet(sheet)?
+            .cell(row, column)
+            .and_then(|c| c.get_formula())
+        {
+            let node = &self.parsed_formulas[sheet as usize][f as usize].clone();
+            let cell_reference = CellReferenceRC {
+                sheet: self.workbook.worksheets[sheet as usize].get_name(),
+                row,
+                column,
+            };
+            // FIXME: This is not a very performant way if the formula has changed :S.
+            let formula = to_string(node, &cell_reference);
+            let formula_displaced = to_string_displaced(node, &cell_reference, displace_data);
+            if formula != formula_displaced {
+                self.update_cell_with_formula(sheet, row, column, format!("={formula_displaced}"))?;
+            }
+        }
+        Ok(())
+    }
     /// This function iterates over all cells in the model and shifts their formulas according to the displacement data.
     ///
     /// # Arguments
     ///
     /// * `displace_data` - A reference to `DisplaceData` describing the displacement's direction and magnitude.
-    fn displace_cells(&mut self, displace_data: &DisplaceData) {
+    fn displace_cells(&mut self, displace_data: &DisplaceData) -> Result<(), String> {
         let cells = self.get_all_cells();
         for cell in cells {
-            self.shift_cell_formula(cell.index, cell.row, cell.column, displace_data);
+            self.shift_cell_formula(cell.index, cell.row, cell.column, displace_data)?;
         }
+        Ok(())
     }
 
     /// Retrieves the column indices for a specific row in a given sheet, sorted in ascending or descending order.
@@ -134,7 +164,7 @@ impl Model {
                 column,
                 delta: column_count,
             }),
-        );
+        )?;
 
         // In the list of columns:
         // * Keep all the columns to the left
@@ -214,7 +244,7 @@ impl Model {
                 column,
                 delta: -column_count,
             }),
-        );
+        )?;
         let worksheet = &mut self.workbook.worksheet_mut(sheet)?;
 
         // deletes all the column styles
@@ -338,7 +368,7 @@ impl Model {
                 row,
                 delta: row_count,
             }),
-        );
+        )?;
 
         Ok(())
     }
@@ -399,7 +429,7 @@ impl Model {
                 row,
                 delta: -row_count,
             }),
-        );
+        )?;
         Ok(())
     }
 
@@ -420,14 +450,14 @@ impl Model {
         sheet: u32,
         column: i32,
         delta: i32,
-    ) -> Result<(), &'static str> {
+    ) -> Result<(), String> {
         // Check boundaries
         let target_column = column + delta;
         if !(1..=LAST_COLUMN).contains(&target_column) {
-            return Err("Target column out of boundaries");
+            return Err("Target column out of boundaries".to_string());
         }
         if !(1..=LAST_COLUMN).contains(&column) {
-            return Err("Initial column out of boundaries");
+            return Err("Initial column out of boundaries".to_string());
         }
 
         // TODO: Add the actual displacement of data and styles
@@ -439,7 +469,7 @@ impl Model {
                 column,
                 delta,
             }),
-        );
+        )?;
 
         Ok(())
     }

base/src/arithmetic.rs

@@ -0,0 +1,158 @@
+use crate::{
+    calc_result::CalcResult,
+    cast::NumberOrArray,
+    expressions::{
+        parser::{ArrayNode, Node},
+        token::Error,
+        types::CellReferenceIndex,
+    },
+    model::Model,
+};
+
+/// Unify how we map booleans/strings to f64
+fn to_f64(value: &ArrayNode) -> Result<f64, Error> {
+    match value {
+        ArrayNode::Number(f) => Ok(*f),
+        ArrayNode::Boolean(b) => Ok(if *b { 1.0 } else { 0.0 }),
+        ArrayNode::String(s) => match s.parse::<f64>() {
+            Ok(f) => Ok(f),
+            Err(_) => Err(Error::VALUE),
+        },
+        ArrayNode::Error(err) => Err(err.clone()),
+    }
+}
+
+impl Model {
+    /// Applies `op` element‐wise for arrays/numbers.
+    pub(crate) fn handle_arithmetic(
+        &mut self,
+        left: &Node,
+        right: &Node,
+        cell: CellReferenceIndex,
+        op: &dyn Fn(f64, f64) -> Result<f64, Error>,
+    ) -> CalcResult {
+        let l = match self.get_number_or_array(left, cell) {
+            Ok(f) => f,
+            Err(s) => {
+                return s;
+            }
+        };
+        let r = match self.get_number_or_array(right, cell) {
+            Ok(f) => f,
+            Err(s) => {
+                return s;
+            }
+        };
+        match (l, r) {
+            // -----------------------------------------------------
+            // Case 1: Both are numbers
+            // -----------------------------------------------------
+            (NumberOrArray::Number(f1), NumberOrArray::Number(f2)) => match op(f1, f2) {
+                Ok(x) => CalcResult::Number(x),
+                Err(Error::DIV) => CalcResult::Error {
+                    error: Error::DIV,
+                    origin: cell,
+                    message: "Divide by 0".to_string(),
+                },
+                Err(Error::VALUE) => CalcResult::Error {
+                    error: Error::VALUE,
+                    origin: cell,
+                    message: "Invalid number".to_string(),
+                },
+                Err(e) => CalcResult::Error {
+                    error: e,
+                    origin: cell,
+                    message: "Unknown error".to_string(),
+                },
+            },
+
+            // -----------------------------------------------------
+            // Case 2: left is Number, right is Array
+            // -----------------------------------------------------
+            (NumberOrArray::Number(f1), NumberOrArray::Array(a2)) => {
+                let mut array = Vec::new();
+                for row in a2 {
+                    let mut data_row = Vec::new();
+                    for node in row {
+                        match to_f64(&node) {
+                            Ok(f2) => match op(f1, f2) {
+                                Ok(x) => data_row.push(ArrayNode::Number(x)),
+                                Err(Error::DIV) => data_row.push(ArrayNode::Error(Error::DIV)),
+                                Err(Error::VALUE) => data_row.push(ArrayNode::Error(Error::VALUE)),
+                                Err(e) => data_row.push(ArrayNode::Error(e)),
+                            },
+                            Err(err) => data_row.push(ArrayNode::Error(err)),
+                        }
+                    }
+                    array.push(data_row);
+                }
+                CalcResult::Array(array)
+            }
+
+            // -----------------------------------------------------
+            // Case 3: left is Array, right is Number
+            // -----------------------------------------------------
+            (NumberOrArray::Array(a1), NumberOrArray::Number(f2)) => {
+                let mut array = Vec::new();
+                for row in a1 {
+                    let mut data_row = Vec::new();
+                    for node in row {
+                        match to_f64(&node) {
+                            Ok(f1) => match op(f1, f2) {
+                                Ok(x) => data_row.push(ArrayNode::Number(x)),
+                                Err(Error::DIV) => data_row.push(ArrayNode::Error(Error::DIV)),
+                                Err(Error::VALUE) => data_row.push(ArrayNode::Error(Error::VALUE)),
+                                Err(e) => data_row.push(ArrayNode::Error(e)),
+                            },
+                            Err(err) => data_row.push(ArrayNode::Error(err)),
+                        }
+                    }
+                    array.push(data_row);
+                }
+                CalcResult::Array(array)
+            }
+
+            // -----------------------------------------------------
+            // Case 4: Both are arrays
+            // -----------------------------------------------------
+            (NumberOrArray::Array(a1), NumberOrArray::Array(a2)) => {
+                let n1 = a1.len();
+                let m1 = a1.first().map(|r| r.len()).unwrap_or(0);
+                let n2 = a2.len();
+                let m2 = a2.first().map(|r| r.len()).unwrap_or(0);
+                let n = n1.max(n2);
+                let m = m1.max(m2);
+
+                let mut array = Vec::new();
+                for i in 0..n {
+                    let row1 = a1.get(i);
+                    let row2 = a2.get(i);
+
+                    let mut data_row = Vec::new();
+                    for j in 0..m {
+                        let val1 = row1.and_then(|r| r.get(j));
+                        let val2 = row2.and_then(|r| r.get(j));
+
+                        match (val1, val2) {
+                            (Some(v1), Some(v2)) => match (to_f64(v1), to_f64(v2)) {
+                                (Ok(f1), Ok(f2)) => match op(f1, f2) {
+                                    Ok(x) => data_row.push(ArrayNode::Number(x)),
+                                    Err(Error::DIV) => data_row.push(ArrayNode::Error(Error::DIV)),
+                                    Err(Error::VALUE) => {
+                                        data_row.push(ArrayNode::Error(Error::VALUE))
+                                    }
+                                    Err(e) => data_row.push(ArrayNode::Error(e)),
+                                },
+                                (Err(e), _) | (_, Err(e)) => data_row.push(ArrayNode::Error(e)),
+                            },
+                            // Mismatched dimensions => #VALUE!
+                            _ => data_row.push(ArrayNode::Error(Error::VALUE)),
+                        }
+                    }
+                    array.push(data_row);
+                }
+                CalcResult::Array(array)
+            }
+        }
+    }
+}

base/src/calc_result.rs

@@ -1,6 +1,6 @@
 use std::cmp::Ordering;
 
-use crate::expressions::{token::Error, types::CellReferenceIndex};
+use crate::expressions::{parser::ArrayNode, token::Error, types::CellReferenceIndex};
 
 #[derive(Clone)]
 pub struct Range {
@@ -24,6 +24,7 @@ pub(crate) enum CalcResult {
     },
     EmptyCell,
     EmptyArg,
+    Array(Vec<Vec<ArrayNode>>),
 }
 
 impl CalcResult {

base/src/cast.rs

@@ -1,11 +1,85 @@
 use crate::{
     calc_result::{CalcResult, Range},
-    expressions::{parser::Node, token::Error, types::CellReferenceIndex},
+    expressions::{
-    implicit_intersection::implicit_intersection,
+        parser::{ArrayNode, Node},
+        token::Error,
+        types::CellReferenceIndex,
+    },
     model::Model,
 };
 
+pub(crate) enum NumberOrArray {
+    Number(f64),
+    Array(Vec<Vec<ArrayNode>>),
+}
+
 impl Model {
+    pub(crate) fn get_number_or_array(
+        &mut self,
+        node: &Node,
+        cell: CellReferenceIndex,
+    ) -> Result<NumberOrArray, CalcResult> {
+        match self.evaluate_node_in_context(node, cell) {
+            CalcResult::Number(f) => Ok(NumberOrArray::Number(f)),
+            CalcResult::String(s) => match s.parse::<f64>() {
+                Ok(f) => Ok(NumberOrArray::Number(f)),
+                _ => Err(CalcResult::new_error(
+                    Error::VALUE,
+                    cell,
+                    "Expecting number".to_string(),
+                )),
+            },
+            CalcResult::Boolean(f) => {
+                if f {
+                    Ok(NumberOrArray::Number(1.0))
+                } else {
+                    Ok(NumberOrArray::Number(0.0))
+                }
+            }
+            CalcResult::EmptyCell | CalcResult::EmptyArg => Ok(NumberOrArray::Number(0.0)),
+            CalcResult::Range { left, right } => {
+                let sheet = left.sheet;
+                if sheet != right.sheet {
+                    return Err(CalcResult::Error {
+                        error: Error::ERROR,
+                        origin: cell,
+                        message: "3D ranges are not allowed".to_string(),
+                    });
+                }
+                // we need to convert the range into an array
+                let mut array = Vec::new();
+                for row in left.row..=right.row {
+                    let mut row_data = Vec::new();
+                    for column in left.column..=right.column {
+                        let value =
+                            match self.evaluate_cell(CellReferenceIndex { sheet, column, row }) {
+                                CalcResult::String(s) => ArrayNode::String(s),
+                                CalcResult::Number(f) => ArrayNode::Number(f),
+                                CalcResult::Boolean(b) => ArrayNode::Boolean(b),
+                                CalcResult::Error { error, .. } => ArrayNode::Error(error),
+                                CalcResult::Range { .. } => {
+                                    // if we do things right this can never happen.
+                                    // the evaluation of a cell should never return a range
+                                    ArrayNode::Number(0.0)
+                                }
+                                CalcResult::EmptyCell => ArrayNode::Number(0.0),
+                                CalcResult::EmptyArg => ArrayNode::Number(0.0),
+                                CalcResult::Array(_) => {
+                                    // if we do things right this can never happen.
+                                    // the evaluation of a cell should never return an array
+                                    ArrayNode::Number(0.0)
+                                }
+                            };
+                        row_data.push(value);
+                    }
+                    array.push(row_data);
+                }
+                Ok(NumberOrArray::Array(array))
+            }
+            CalcResult::Array(s) => Ok(NumberOrArray::Array(s)),
+            error @ CalcResult::Error { .. } => Err(error),
+        }
+    }
     pub(crate) fn get_number(
         &mut self,
         node: &Node,
@@ -39,19 +113,16 @@ impl Model {
             }
             CalcResult::EmptyCell | CalcResult::EmptyArg => Ok(0.0),
             error @ CalcResult::Error { .. } => Err(error),
-            CalcResult::Range { left, right } => {
+            CalcResult::Range { .. } => Err(CalcResult::Error {
-                match implicit_intersection(&cell, &Range { left, right }) {
+                error: Error::NIMPL,
-                    Some(cell_reference) => {
-                        let result = self.evaluate_cell(cell_reference);
-                        self.cast_to_number(result, cell_reference)
-                    }
-                    None => Err(CalcResult::Error {
-                        error: Error::VALUE,
                 origin: cell,
-                        message: "Invalid reference (number)".to_string(),
+                message: "Arrays not supported yet".to_string(),
+            }),
+            CalcResult::Array(_) => Err(CalcResult::Error {
+                error: Error::NIMPL,
+                origin: cell,
+                message: "Arrays not supported yet".to_string(),
             }),
-                }
-            }
         }
     }
 
@@ -88,7 +159,7 @@ impl Model {
         // FIXME: I think when casting a number we should convert it to_precision(x, 15)
         // See function Exact
         match result {
-            CalcResult::Number(f) => Ok(format!("{}", f)),
+            CalcResult::Number(f) => Ok(format!("{f}")),
             CalcResult::String(s) => Ok(s),
             CalcResult::Boolean(f) => {
                 if f {
@@ -99,19 +170,16 @@ impl Model {
             }
             CalcResult::EmptyCell | CalcResult::EmptyArg => Ok("".to_string()),
             error @ CalcResult::Error { .. } => Err(error),
-            CalcResult::Range { left, right } => {
+            CalcResult::Range { .. } => Err(CalcResult::Error {
-                match implicit_intersection(&cell, &Range { left, right }) {
+                error: Error::NIMPL,
-                    Some(cell_reference) => {
-                        let result = self.evaluate_cell(cell_reference);
-                        self.cast_to_string(result, cell_reference)
-                    }
-                    None => Err(CalcResult::Error {
-                        error: Error::VALUE,
                 origin: cell,
-                        message: "Invalid reference (string)".to_string(),
+                message: "Arrays not supported yet".to_string(),
+            }),
+            CalcResult::Array(_) => Err(CalcResult::Error {
+                error: Error::NIMPL,
+                origin: cell,
+                message: "Arrays not supported yet".to_string(),
             }),
-                }
-            }
         }
     }
 
@@ -151,19 +219,16 @@ impl Model {
             CalcResult::Boolean(b) => Ok(b),
             CalcResult::EmptyCell | CalcResult::EmptyArg => Ok(false),
             error @ CalcResult::Error { .. } => Err(error),
-            CalcResult::Range { left, right } => {
+            CalcResult::Range { .. } => Err(CalcResult::Error {
-                match implicit_intersection(&cell, &Range { left, right }) {
+                error: Error::NIMPL,
-                    Some(cell_reference) => {
-                        let result = self.evaluate_cell(cell_reference);
-                        self.cast_to_bool(result, cell_reference)
-                    }
-                    None => Err(CalcResult::Error {
-                        error: Error::VALUE,
                 origin: cell,
-                        message: "Invalid reference (bool)".to_string(),
+                message: "Arrays not supported yet".to_string(),
+            }),
+            CalcResult::Array(_) => Err(CalcResult::Error {
+                error: Error::NIMPL,
+                origin: cell,
+                message: "Arrays not supported yet".to_string(),
             }),
-                }
-            }
         }
     }
 

base/src/diffs.rs

@@ -1,138 +0,0 @@
-use crate::{
-    expressions::{
-        parser::{
-            move_formula::ref_is_in_area,
-            stringify::{to_string, to_string_displaced, DisplaceData},
-            walk::forward_references,
-        },
-        types::{Area, CellReferenceIndex, CellReferenceRC},
-    },
-    model::Model,
-};
-use serde::{Deserialize, Serialize};
-
-#[derive(Serialize, Deserialize, Debug, Clone, PartialEq, Eq)]
-#[serde(untagged, deny_unknown_fields)]
-pub enum CellValue {
-    Value(String),
-    None,
-}
-
-#[derive(Serialize, Deserialize, Debug, Clone, PartialEq, Eq)]
-pub struct SetCellValue {
-    cell: CellReferenceIndex,
-    new_value: CellValue,
-    old_value: CellValue,
-}
-
-impl Model {
-    #[allow(clippy::expect_used)]
-    pub(crate) fn shift_cell_formula(
-        &mut self,
-        sheet: u32,
-        row: i32,
-        column: i32,
-        displace_data: &DisplaceData,
-    ) {
-        if let Some(f) = self
-            .workbook
-            .worksheet(sheet)
-            .expect("Worksheet must exist")
-            .cell(row, column)
-            .expect("Cell must exist")
-            .get_formula()
-        {
-            let node = &self.parsed_formulas[sheet as usize][f as usize].clone();
-            let cell_reference = CellReferenceRC {
-                sheet: self.workbook.worksheets[sheet as usize].get_name(),
-                row,
-                column,
-            };
-            // FIXME: This is not a very performant way if the formula has changed :S.
-            let formula = to_string(node, &cell_reference);
-            let formula_displaced = to_string_displaced(node, &cell_reference, displace_data);
-            if formula != formula_displaced {
-                self.update_cell_with_formula(sheet, row, column, format!("={formula_displaced}"))
-                    .expect("Failed to shift cell formula");
-            }
-        }
-    }
-
-    #[allow(clippy::expect_used)]
-    pub fn forward_references(
-        &mut self,
-        source_area: &Area,
-        target: &CellReferenceIndex,
-    ) -> Result<Vec<SetCellValue>, String> {
-        let mut diff_list: Vec<SetCellValue> = Vec::new();
-        let target_area = &Area {
-            sheet: target.sheet,
-            row: target.row,
-            column: target.column,
-            width: source_area.width,
-            height: source_area.height,
-        };
-        // Walk over every formula
-        let cells = self.get_all_cells();
-        for cell in cells {
-            if let Some(f) = self
-                .workbook
-                .worksheet(cell.index)
-                .expect("Worksheet must exist")
-                .cell(cell.row, cell.column)
-                .expect("Cell must exist")
-                .get_formula()
-            {
-                let sheet = cell.index;
-                let row = cell.row;
-                let column = cell.column;
-
-                // If cell is in the source or target area, skip
-                if ref_is_in_area(sheet, row, column, source_area)
-                    || ref_is_in_area(sheet, row, column, target_area)
-                {
-                    continue;
-                }
-
-                // Get the formula
-                // Get a copy of the AST
-                let node = &mut self.parsed_formulas[sheet as usize][f as usize].clone();
-                let cell_reference = CellReferenceRC {
-                    sheet: self.workbook.worksheets[sheet as usize].get_name(),
-                    column: cell.column,
-                    row: cell.row,
-                };
-                let context = CellReferenceIndex { sheet, column, row };
-                let formula = to_string(node, &cell_reference);
-                let target_sheet_name = &self.workbook.worksheets[target.sheet as usize].name;
-                forward_references(
-                    node,
-                    &context,
-                    source_area,
-                    target.sheet,
-                    target_sheet_name,
-                    target.row,
-                    target.column,
-                );
-
-                // If the string representation of the formula has changed update the cell
-                let updated_formula = to_string(node, &cell_reference);
-                if formula != updated_formula {
-                    self.update_cell_with_formula(
-                        sheet,
-                        row,
-                        column,
-                        format!("={updated_formula}"),
-                    )?;
-                    // Update the diff list
-                    diff_list.push(SetCellValue {
-                        cell: CellReferenceIndex { sheet, column, row },
-                        new_value: CellValue::Value(format!("={}", updated_formula)),
-                        old_value: CellValue::Value(format!("={}", formula)),
-                    });
-                }
-            }
-        }
-        Ok(diff_list)
-    }
-}

base/src/expressions/lexer/mod.rs

@@ -142,7 +142,7 @@ impl Lexer {
     pub fn expect(&mut self, tk: TokenType) -> Result<()> {
         let nt = self.next_token();
         if mem::discriminant(&nt) != mem::discriminant(&tk) {
-            return Err(self.set_error(&format!("Error, expected {:?}", tk), self.position));
+            return Err(self.set_error(&format!("Error, expected {tk:?}"), self.position));
         }
         Ok(())
     }
@@ -187,6 +187,7 @@ impl Lexer {
                     ']' => TokenType::RightBracket,
                     ':' => TokenType::Colon,
                     ';' => TokenType::Semicolon,
+                    '@' => TokenType::At,
                     ',' => {
                         if self.locale.numbers.symbols.decimal == "," {
                             match self.consume_number(',') {
@@ -510,7 +511,7 @@ impl Lexer {
         self.position = position;
         chars.parse::<i32>().map_err(|_| LexerError {
             position,
-            message: format!("Failed to parse to int: {}", chars),
+            message: format!("Failed to parse to int: {chars}"),
         })
     }
 
@@ -571,9 +572,7 @@ impl Lexer {
         }
         self.position = position;
         match chars.parse::<f64>() {
-            Err(_) => {
+            Err(_) => Err(self.set_error(&format!("Failed to parse to double: {chars}"), position)),
-                Err(self.set_error(&format!("Failed to parse to double: {}", chars), position))
-            }
             Ok(v) => Ok(v),
         }
     }

base/src/expressions/lexer/ranges.rs

@@ -148,15 +148,16 @@ impl Lexer {
                     let row_left = match row_left.parse::<i32>() {
                         Ok(n) => n,
                         Err(_) => {
-                            return Err(self
+                            return Err(
-                                .set_error(&format!("Failed parsing row {}", row_left), position))
+                                self.set_error(&format!("Failed parsing row {row_left}"), position)
+                            )
                         }
                     };
                     let row_right = match row_right.parse::<i32>() {
                         Ok(n) => n,
                         Err(_) => {
                             return Err(self
-                                .set_error(&format!("Failed parsing row {}", row_right), position))
+                                .set_error(&format!("Failed parsing row {row_right}"), position))
                         }
                     };
                     if row_left > LAST_ROW {

base/src/expressions/lexer/structured_references.rs

@@ -23,19 +23,19 @@ impl Lexer {
             // TODO(TD): There are better ways of doing this :)
             let rest_of_formula: String = self.chars[self.position..self.len].iter().collect();
             let specifier = if rest_of_formula.starts_with("#This Row]") {
-                self.position += "#This Row]".bytes().len();
+                self.position += "#This Row]".len();
                 TableSpecifier::ThisRow
             } else if rest_of_formula.starts_with("#All]") {
-                self.position += "#All]".bytes().len();
+                self.position += "#All]".len();
                 TableSpecifier::All
             } else if rest_of_formula.starts_with("#Data]") {
-                self.position += "#Data]".bytes().len();
+                self.position += "#Data]".len();
                 TableSpecifier::Data
             } else if rest_of_formula.starts_with("#Headers]") {
-                self.position += "#Headers]".bytes().len();
+                self.position += "#Headers]".len();
                 TableSpecifier::Headers
             } else if rest_of_formula.starts_with("#Totals]") {
-                self.position += "#Totals]".bytes().len();
+                self.position += "#Totals]".len();
                 TableSpecifier::Totals
             } else {
                 return Err(LexerError {

base/src/expressions/lexer/test/mod.rs

@@ -1,4 +1,5 @@
 mod test_common;
+mod test_implicit_intersection;
 mod test_language;
 mod test_locale;
 mod test_ranges;

base/src/expressions/lexer/test/test_implicit_intersection.rs

@@ -0,0 +1,25 @@
+#![allow(clippy::unwrap_used)]
+
+use crate::expressions::{
+    lexer::{Lexer, LexerMode},
+    token::TokenType::*,
+};
+use crate::language::get_language;
+use crate::locale::get_locale;
+
+fn new_lexer(formula: &str) -> Lexer {
+    let locale = get_locale("en").unwrap();
+    let language = get_language("en").unwrap();
+    Lexer::new(formula, LexerMode::A1, locale, language)
+}
+
+#[test]
+fn sum_implicit_intersection() {
+    let mut lx = new_lexer("sum(@A1:A3)");
+    assert_eq!(lx.next_token(), Ident("sum".to_string()));
+    assert_eq!(lx.next_token(), LeftParenthesis);
+    assert_eq!(lx.next_token(), At);
+    assert!(matches!(lx.next_token(), Range { .. }));
+    assert_eq!(lx.next_token(), RightParenthesis);
+    assert_eq!(lx.next_token(), EOF);
+}

base/src/expressions/parser/mod.rs

@@ -1,5 +1,5 @@
 /*!
-# GRAMAR
+# GRAMMAR
 
 <pre class="rust">
 opComp   => '=' | '<' | '>' | '<=' } '>=' | '<>'
@@ -12,7 +12,8 @@ term    => factor (opFactor factor)*
 factor  => prod (opProd prod)*
 prod    => power ('^' power)*
 power   => (unaryOp)* range '%'*
-range   => primary (':' primary)?
+range   => implicit (':' primary)?
+implicit=> '@' primary | primary
 primary => '(' expr ')'
         => number
         => function '(' f_args ')'
@@ -45,8 +46,8 @@ use super::utils::number_to_column;
 use token::OpCompare;
 
 pub mod move_formula;
+pub mod static_analysis;
 pub mod stringify;
-pub mod walk;
 
 #[cfg(test)]
 mod tests;
@@ -81,6 +82,9 @@ fn get_table_column_by_name(table_column_name: &str, table: &Table) -> Option<i3
     None
 }
 
+// DefinedNameS is a tuple with the name of the defined name, the index of the sheet and the formula
+pub type DefinedNameS = (String, Option<u32>, String);
+
 pub(crate) struct Reference<'a> {
     sheet_name: &'a Option<String>,
     sheet_index: u32,
@@ -90,6 +94,14 @@ pub(crate) struct Reference<'a> {
     column: i32,
 }
 
+#[derive(PartialEq, Clone, Debug)]
+pub enum ArrayNode {
+    Boolean(bool),
+    Number(f64),
+    String(String),
+    Error(token::Error),
+}
+
 #[derive(PartialEq, Clone, Debug)]
 pub enum Node {
     BooleanKind(bool),
@@ -163,10 +175,14 @@ pub enum Node {
         name: String,
         args: Vec<Node>,
     },
-    ArrayKind(Vec<Node>),
+    ArrayKind(Vec<Vec<ArrayNode>>),
-    DefinedNameKind((String, Option<u32>)),
+    DefinedNameKind(DefinedNameS),
     TableNameKind(String),
     WrongVariableKind(String),
+    ImplicitIntersection {
+        automatic: bool,
+        child: Box<Node>,
+    },
     CompareKind {
         kind: OpCompare,
         left: Box<Node>,
@@ -189,7 +205,7 @@ pub enum Node {
 pub struct Parser {
     lexer: lexer::Lexer,
     worksheets: Vec<String>,
-    defined_names: Vec<(String, Option<u32>)>,
+    defined_names: Vec<DefinedNameS>,
     context: CellReferenceRC,
     tables: HashMap<String, Table>,
 }
@@ -197,7 +213,7 @@ pub struct Parser {
 impl Parser {
     pub fn new(
         worksheets: Vec<String>,
-        defined_names: Vec<(String, Option<u32>)>,
+        defined_names: Vec<DefinedNameS>,
         tables: HashMap<String, Table>,
     ) -> Parser {
         let lexer = lexer::Lexer::new(
@@ -228,7 +244,7 @@ impl Parser {
     pub fn set_worksheets_and_names(
         &mut self,
         worksheets: Vec<String>,
-        defined_names: Vec<(String, Option<u32>)>,
+        defined_names: Vec<DefinedNameS>,
     ) {
         self.worksheets = worksheets;
         self.defined_names = defined_names;
@@ -252,17 +268,17 @@ impl Parser {
 
     // Returns:
     //  * None: If there is no defined name by that name
-    //  * Some(Some(index)): If there is a defined name local to that sheet
+    //  * Some((Some(index), formula)): If there is a defined name local to that sheet
     //  * Some(None): If there is a global defined name
-    fn get_defined_name(&self, name: &str, sheet: u32) -> Option<Option<u32>> {
+    fn get_defined_name(&self, name: &str, sheet: u32) -> Option<(Option<u32>, String)> {
-        for (df_name, df_scope) in &self.defined_names {
+        for (df_name, df_scope, df_formula) in &self.defined_names {
             if name.to_lowercase() == df_name.to_lowercase() && df_scope == &Some(sheet) {
-                return Some(*df_scope);
+                return Some((*df_scope, df_formula.to_owned()));
             }
         }
-        for (df_name, df_scope) in &self.defined_names {
+        for (df_name, df_scope, df_formula) in &self.defined_names {
             if name.to_lowercase() == df_name.to_lowercase() && df_scope.is_none() {
-                return Some(None);
+                return Some((None, df_formula.to_owned()));
             }
         }
         None
@@ -411,7 +427,7 @@ impl Parser {
     }
 
     fn parse_range(&mut self) -> Node {
-        let t = self.parse_primary();
+        let t = self.parse_implicit();
         if let Node::ParseErrorKind { .. } = t {
             return t;
         }
@@ -430,6 +446,65 @@ impl Parser {
         t
     }
 
+    fn parse_implicit(&mut self) -> Node {
+        let next_token = self.lexer.peek_token();
+        if next_token == TokenType::At {
+            self.lexer.advance_token();
+            let t = self.parse_primary();
+            if let Node::ParseErrorKind { .. } = t {
+                return t;
+            }
+            return Node::ImplicitIntersection {
+                automatic: false,
+                child: Box::new(t),
+            };
+        }
+        self.parse_primary()
+    }
+
+    fn parse_array_row(&mut self) -> Result<Vec<ArrayNode>, Node> {
+        let mut row = Vec::new();
+        // and array can only have numbers, string or booleans
+        // otherwise it is a syntax error
+        let first_element = match self.parse_expr() {
+            Node::BooleanKind(s) => ArrayNode::Boolean(s),
+            Node::NumberKind(s) => ArrayNode::Number(s),
+            Node::StringKind(s) => ArrayNode::String(s),
+            Node::ErrorKind(kind) => ArrayNode::Error(kind),
+            error @ Node::ParseErrorKind { .. } => return Err(error),
+            _ => {
+                return Err(Node::ParseErrorKind {
+                    formula: self.lexer.get_formula(),
+                    message: "Invalid value in array".to_string(),
+                    position: self.lexer.get_position() as usize,
+                });
+            }
+        };
+        row.push(first_element);
+        let mut next_token = self.lexer.peek_token();
+        // FIXME: this is not respecting the locale
+        while next_token == TokenType::Comma {
+            self.lexer.advance_token();
+            let value = match self.parse_expr() {
+                Node::BooleanKind(s) => ArrayNode::Boolean(s),
+                Node::NumberKind(s) => ArrayNode::Number(s),
+                Node::StringKind(s) => ArrayNode::String(s),
+                Node::ErrorKind(kind) => ArrayNode::Error(kind),
+                error @ Node::ParseErrorKind { .. } => return Err(error),
+                _ => {
+                    return Err(Node::ParseErrorKind {
+                        formula: self.lexer.get_formula(),
+                        message: "Invalid value in array".to_string(),
+                        position: self.lexer.get_position() as usize,
+                    });
+                }
+            };
+            row.push(value);
+            next_token = self.lexer.peek_token();
+        }
+        Ok(row)
+    }
+
     fn parse_primary(&mut self) -> Node {
         let next_token = self.lexer.next_token();
         match next_token {
@@ -451,21 +526,35 @@ impl Parser {
             TokenType::Number(s) => Node::NumberKind(s),
             TokenType::String(s) => Node::StringKind(s),
             TokenType::LeftBrace => {
-                let t = self.parse_expr();
+                // It's an array. It's a collection of rows all of the same dimension
-                if let Node::ParseErrorKind { .. } = t {
+
-                    return t;
+                let first_row = match self.parse_array_row() {
-                }
+                    Ok(s) => s,
+                    Err(error) => return error,
+                };
+                let length = first_row.len();
+
+                let mut matrix = Vec::new();
+                matrix.push(first_row);
+                // FIXME: this is not respecting the locale
                 let mut next_token = self.lexer.peek_token();
-                let mut args: Vec<Node> = vec![t];
                 while next_token == TokenType::Semicolon {
                     self.lexer.advance_token();
-                    let p = self.parse_expr();
+                    let row = match self.parse_array_row() {
-                    if let Node::ParseErrorKind { .. } = p {
+                        Ok(s) => s,
-                        return p;
+                        Err(error) => return error,
-                    }
+                    };
                     next_token = self.lexer.peek_token();
-                    args.push(p);
+                    if row.len() != length {
+                        return Node::ParseErrorKind {
+                            formula: self.lexer.get_formula(),
+                            position: self.lexer.get_position() as usize,
+                            message: "All rows in an array should be the same length".to_string(),
+                        };
                     }
+                    matrix.push(row);
+                }
+
                 if let Err(err) = self.lexer.expect(TokenType::RightBrace) {
                     return Node::ParseErrorKind {
                         formula: self.lexer.get_formula(),
@@ -473,7 +562,7 @@ impl Parser {
                         message: err.message,
                     };
                 }
-                Node::ArrayKind(args)
+                Node::ArrayKind(matrix)
             }
             TokenType::Reference {
                 sheet,
@@ -604,6 +693,20 @@ impl Parser {
                             args,
                         };
                     }
+                    if &name == "_xlfn.SINGLE" {
+                        if args.len() != 1 {
+                            return Node::ParseErrorKind {
+                                formula: self.lexer.get_formula(),
+                                position: self.lexer.get_position() as usize,
+                                message: "Implicit Intersection requires just one argument"
+                                    .to_string(),
+                            };
+                        }
+                        return Node::ImplicitIntersection {
+                            automatic: false,
+                            child: Box::new(args[0].clone()),
+                        };
+                    }
                     return Node::InvalidFunctionKind { name, args };
                 }
                 let context = &self.context;
@@ -620,8 +723,8 @@ impl Parser {
                 };
 
                 // Could be a defined name or a table
-                if let Some(scope) = self.get_defined_name(&name, context_sheet_index) {
+                if let Some((scope, formula)) = self.get_defined_name(&name, context_sheet_index) {
-                    return Node::DefinedNameKind((name, scope));
+                    return Node::DefinedNameKind((name, scope, formula));
                 }
                 let name_lower = name.to_lowercase();
                 for table_name in self.tables.keys() {
@@ -706,6 +809,14 @@ impl Parser {
                     message: "Unexpected token: 'POWER'".to_string(),
                 }
             }
+            TokenType::At => {
+                // A primary Node cannot start with an operator
+                Node::ParseErrorKind {
+                    formula: self.lexer.get_formula(),
+                    position: 0,
+                    message: "Unexpected token: '@'".to_string(),
+                }
+            }
             TokenType::RightParenthesis
             | TokenType::RightBracket
             | TokenType::Colon
@@ -717,7 +828,7 @@ impl Parser {
             | TokenType::Percent => Node::ParseErrorKind {
                 formula: self.lexer.get_formula(),
                 position: 0,
-                message: format!("Unexpected token: '{:?}'", next_token),
+                message: format!("Unexpected token: '{next_token:?}'"),
             },
             TokenType::LeftBracket => Node::ParseErrorKind {
                 formula: self.lexer.get_formula(),

base/src/expressions/parser/move_formula.rs

@@ -1,6 +1,6 @@
 use super::{
     stringify::{stringify_reference, DisplaceData},
-    Node, Reference,
+    ArrayNode, Node, Reference,
 };
 use crate::{
     constants::{LAST_COLUMN, LAST_ROW},
@@ -53,15 +53,24 @@ fn move_function(name: &str, args: &Vec<Node>, move_context: &MoveContext) -> St
             arguments = to_string_moved(el, move_context);
         }
     }
-    format!("{}({})", name, arguments)
+    format!("{name}({arguments})")
+}
+
+pub(crate) fn to_string_array_node(node: &ArrayNode) -> String {
+    match node {
+        ArrayNode::Boolean(value) => format!("{value}").to_ascii_uppercase(),
+        ArrayNode::Number(number) => to_excel_precision_str(*number),
+        ArrayNode::String(value) => format!("\"{value}\""),
+        ArrayNode::Error(kind) => format!("{kind}"),
+    }
 }
 
 fn to_string_moved(node: &Node, move_context: &MoveContext) -> String {
     use self::Node::*;
     match node {
-        BooleanKind(value) => format!("{}", value).to_ascii_uppercase(),
+        BooleanKind(value) => format!("{value}").to_ascii_uppercase(),
         NumberKind(number) => to_excel_precision_str(*number),
-        StringKind(value) => format!("\"{}\"", value),
+        StringKind(value) => format!("\"{value}\""),
         ReferenceKind {
             sheet_name,
             sheet_index,
@@ -232,7 +241,7 @@ fn to_string_moved(node: &Node, move_context: &MoveContext) -> String {
                 full_row,
                 full_column,
             );
-            format!("{}:{}", s1, s2)
+            format!("{s1}:{s2}")
         }
         WrongReferenceKind {
             sheet_name,
@@ -316,7 +325,7 @@ fn to_string_moved(node: &Node, move_context: &MoveContext) -> String {
                 full_row,
                 full_column,
             );
-            format!("{}:{}", s1, s2)
+            format!("{s1}:{s2}")
         }
         OpRangeKind { left, right } => format!(
             "{}:{}",
@@ -349,7 +358,7 @@ fn to_string_moved(node: &Node, move_context: &MoveContext) -> String {
                 }
                 _ => to_string_moved(right, move_context),
             };
-            format!("{}{}{}", x, kind, y)
+            format!("{x}{kind}{y}")
         }
         OpPowerKind { left, right } => format!(
             "{}^{}",
@@ -362,20 +371,41 @@ fn to_string_moved(node: &Node, move_context: &MoveContext) -> String {
             move_function(name, args, move_context)
         }
         ArrayKind(args) => {
-            // This code is a placeholder. Arrays are not yet implemented
+            let mut first_row = true;
-            let mut first = true;
+            let mut matrix_string = String::new();
-            let mut arguments = "".to_string();
+
-            for el in args {
+            // Each element in `args` is assumed to be one "row" (itself a `Vec<T>`).
-                if !first {
+            for row in args {
-                    arguments = format!("{},{}", arguments, to_string_moved(el, move_context));
+                if !first_row {
+                    matrix_string.push(',');
                 } else {
-                    first = false;
+                    first_row = false;
-                    arguments = to_string_moved(el, move_context);
                 }
+
+                // Build the string for the current row
+                let mut first_col = true;
+                let mut row_string = String::new();
+                for el in row {
+                    if !first_col {
+                        row_string.push(',');
+                    } else {
+                        first_col = false;
                     }
-            format!("{{{}}}", arguments)
+
+                    // Reuse your existing element-stringification function
+                    row_string.push_str(&to_string_array_node(el));
                 }
-        DefinedNameKind((name, _)) => name.to_string(),
+
+                // Enclose the row in braces
+                matrix_string.push('{');
+                matrix_string.push_str(&row_string);
+                matrix_string.push('}');
+            }
+
+            // Enclose the whole matrix in braces
+            format!("{{{matrix_string}}}")
+        }
+        DefinedNameKind((name, ..)) => name.to_string(),
         TableNameKind(name) => name.to_string(),
         WrongVariableKind(name) => name.to_string(),
         CompareKind { kind, left, right } => format!(
@@ -388,12 +418,18 @@ fn to_string_moved(node: &Node, move_context: &MoveContext) -> String {
             OpUnary::Minus => format!("-{}", to_string_moved(right, move_context)),
             OpUnary::Percentage => format!("{}%", to_string_moved(right, move_context)),
         },
-        ErrorKind(kind) => format!("{}", kind),
+        ErrorKind(kind) => format!("{kind}"),
         ParseErrorKind {
             formula,
             message: _,
             position: _,
         } => formula.to_string(),
         EmptyArgKind => "".to_string(),
+        ImplicitIntersection {
+            automatic: _,
+            child,
+        } => {
+            format!("@{}", to_string_moved(child, move_context))
+        }
     }
 }

base/src/expressions/parser/static_analysis.rs

@@ -0,0 +1,984 @@
+use crate::functions::Function;
+
+use super::Node;
+
+use once_cell::sync::Lazy;
+use regex::Regex;
+
+#[allow(clippy::expect_used)]
+static RE: Lazy<Regex> =
+    Lazy::new(|| Regex::new(r":[A-Z]*[0-9]*$").expect("Regex is known to be valid"));
+
+fn is_range_reference(s: &str) -> bool {
+    RE.is_match(s)
+}
+
+/*
+
+# NOTES on the Implicit Intersection operator: @
+
+ Sometimes we obtain a range where we expected a single argument. This can happen:
+
+ * As an argument of a function, eg: `SIN(A1:A5)`
+ * As the result of a computation of a formula `=A1:A5`
+
+ In previous versions of the Friendly Giant the spreadsheet engine would perform an operation called _implicit intersection_
+ that tries to find a single cell within the range. It works by picking a cell in the range that is the same row or the same column
+ as the cell. If there is just one we return that otherwise we return the `#REF!` error.
+
+ Examples:
+
+ * Siting on `C3` the formula `=D1:D5` will return `D3`
+ * Sitting on `C3` the formula `=D:D` will return `D3`
+ * Sitting on `C3` the formula `=A1:A7` will return `A3`
+ * Sitting on `C3` the formula `=A5:A8` will return `#REF!`
+ * Sitting on `C3` the formula `D1:G7` will return `#REF!`
+
+ Today's version of the engine will result in a dynamic array spilling the result through several cells.
+ To force the old behaviour we can use the _implicit intersection operator_: @
+
+ * `=@A1:A7` or `=SIN(@A1:A7)
+
+ When parsing formulas that come form old workbooks this is done automatically.
+ We call this version of the II operator the _automatic_ II operator.
+
+ We can also insert the II operator in places where before was impossible:
+
+ * `=SUM(@A1:A7)`
+
+ This formulas will not be compatible with old versions of the engine. The FG will stringify this as `=SUM(_xlfn.SIMPLE(A1:A7))`.
+ */
+
+/// Transverses the formula tree adding the implicit intersection operator in all arguments of functions that
+/// expect a scalar but get a range.
+///  * A:A => @A:A
+///  * SIN(A1:D1) => SIN(@A1:D1)
+///
+/// Assumes formula return a scalar
+pub fn add_implicit_intersection(node: &mut Node, add: bool) {
+    match node {
+        Node::BooleanKind(_)
+        | Node::NumberKind(_)
+        | Node::StringKind(_)
+        | Node::ErrorKind(_)
+        | Node::EmptyArgKind
+        | Node::ParseErrorKind { .. }
+        | Node::WrongReferenceKind { .. }
+        | Node::WrongRangeKind { .. }
+        | Node::InvalidFunctionKind { .. }
+        | Node::ArrayKind(_)
+        | Node::ReferenceKind { .. } => {}
+        Node::ImplicitIntersection { child, .. } => {
+            // We need to check wether the II can be automatic or not
+            let mut new_node = child.as_ref().clone();
+            add_implicit_intersection(&mut new_node, add);
+            if matches!(&new_node, Node::ImplicitIntersection { .. }) {
+                *node = new_node
+            }
+        }
+        Node::RangeKind {
+            row1,
+            column1,
+            row2,
+            column2,
+            sheet_name,
+            sheet_index,
+            absolute_row1,
+            absolute_column1,
+            absolute_row2,
+            absolute_column2,
+        } => {
+            if add {
+                *node = Node::ImplicitIntersection {
+                    automatic: true,
+                    child: Box::new(Node::RangeKind {
+                        sheet_name: sheet_name.clone(),
+                        sheet_index: *sheet_index,
+                        absolute_row1: *absolute_row1,
+                        absolute_column1: *absolute_column1,
+                        row1: *row1,
+                        column1: *column1,
+                        absolute_row2: *absolute_row2,
+                        absolute_column2: *absolute_column2,
+                        row2: *row2,
+                        column2: *column2,
+                    }),
+                };
+            }
+        }
+        Node::OpRangeKind { left, right } => {
+            if add {
+                *node = Node::ImplicitIntersection {
+                    automatic: true,
+                    child: Box::new(Node::OpRangeKind {
+                        left: left.clone(),
+                        right: right.clone(),
+                    }),
+                }
+            }
+        }
+
+        // operations
+        Node::UnaryKind { right, .. } => add_implicit_intersection(right, add),
+        Node::OpConcatenateKind { left, right }
+        | Node::OpSumKind { left, right, .. }
+        | Node::OpProductKind { left, right, .. }
+        | Node::OpPowerKind { left, right, .. }
+        | Node::CompareKind { left, right, .. } => {
+            add_implicit_intersection(left, add);
+            add_implicit_intersection(right, add);
+        }
+
+        Node::DefinedNameKind(v) => {
+            if add {
+                // Not all defined names deserve the II operator
+                // For instance =Sheet1!A1 doesn't need to be intersected
+                if is_range_reference(&v.2) {
+                    *node = Node::ImplicitIntersection {
+                        automatic: true,
+                        child: Box::new(Node::DefinedNameKind(v.to_owned())),
+                    }
+                }
+            }
+        }
+        Node::WrongVariableKind(v) => {
+            if add {
+                *node = Node::ImplicitIntersection {
+                    automatic: true,
+                    child: Box::new(Node::WrongVariableKind(v.to_owned())),
+                }
+            }
+        }
+        Node::TableNameKind(_) => {
+            // noop for now
+        }
+        Node::FunctionKind { kind, args } => {
+            let arg_count = args.len();
+            let signature = get_function_args_signature(kind, arg_count);
+            for index in 0..arg_count {
+                if matches!(signature[index], Signature::Scalar)
+                    && matches!(
+                        run_static_analysis_on_node(&args[index]),
+                        StaticResult::Range(_, _) | StaticResult::Unknown
+                    )
+                {
+                    add_implicit_intersection(&mut args[index], true);
+                } else {
+                    add_implicit_intersection(&mut args[index], false);
+                }
+            }
+            if add
+                && matches!(
+                    run_static_analysis_on_node(node),
+                    StaticResult::Range(_, _) | StaticResult::Unknown
+                )
+            {
+                *node = Node::ImplicitIntersection {
+                    automatic: true,
+                    child: Box::new(node.clone()),
+                }
+            }
+        }
+    };
+}
+
+pub(crate) enum StaticResult {
+    Scalar,
+    Array(i32, i32),
+    Range(i32, i32),
+    Unknown,
+    // TODO: What if one of the dimensions is known?
+    // what if the dimensions are unknown but bounded?
+}
+
+fn static_analysis_op_nodes(left: &Node, right: &Node) -> StaticResult {
+    let lhs = run_static_analysis_on_node(left);
+    let rhs = run_static_analysis_on_node(right);
+    match (lhs, rhs) {
+        (StaticResult::Scalar, StaticResult::Scalar) => StaticResult::Scalar,
+        (StaticResult::Scalar, StaticResult::Array(a, b) | StaticResult::Range(a, b)) => {
+            StaticResult::Array(a, b)
+        }
+
+        (StaticResult::Array(a, b) | StaticResult::Range(a, b), StaticResult::Scalar) => {
+            StaticResult::Array(a, b)
+        }
+        (
+            StaticResult::Array(a1, b1) | StaticResult::Range(a1, b1),
+            StaticResult::Array(a2, b2) | StaticResult::Range(a2, b2),
+        ) => StaticResult::Array(a1.max(a2), b1.max(b2)),
+
+        (_, StaticResult::Unknown) => StaticResult::Unknown,
+        (StaticResult::Unknown, _) => StaticResult::Unknown,
+    }
+}
+
+// Returns:
+//  * Scalar if we can proof the result of the evaluation is a scalar
+//  * Array(a, b) if we know it will be an a x b array.
+//  * Range(a, b) if we know it will be a a x b range.
+//  * Unknown if we cannot guaranty either
+fn run_static_analysis_on_node(node: &Node) -> StaticResult {
+    match node {
+        Node::BooleanKind(_)
+        | Node::NumberKind(_)
+        | Node::StringKind(_)
+        | Node::ErrorKind(_)
+        | Node::EmptyArgKind => StaticResult::Scalar,
+        Node::UnaryKind { right, .. } => run_static_analysis_on_node(right),
+        Node::ParseErrorKind { .. } => {
+            // StaticResult::Unknown is also valid
+            StaticResult::Scalar
+        }
+        Node::WrongReferenceKind { .. } => {
+            // StaticResult::Unknown is also valid
+            StaticResult::Scalar
+        }
+        Node::WrongRangeKind { .. } => {
+            // StaticResult::Unknown or Array is also valid
+            StaticResult::Scalar
+        }
+        Node::InvalidFunctionKind { .. } => {
+            // StaticResult::Unknown is also valid
+            StaticResult::Scalar
+        }
+        Node::ArrayKind(array) => {
+            let n = array.len() as i32;
+            // FIXME: This is a placeholder until we implement arrays
+            StaticResult::Array(n, 1)
+        }
+        Node::RangeKind {
+            row1,
+            column1,
+            row2,
+            column2,
+            ..
+        } => StaticResult::Range(row2 - row1, column2 - column1),
+        Node::OpRangeKind { .. } => {
+            // TODO: We could do a bit better here
+            StaticResult::Unknown
+        }
+        Node::ReferenceKind { .. } => StaticResult::Scalar,
+
+        // binary operations
+        Node::OpConcatenateKind { left, right } => static_analysis_op_nodes(left, right),
+        Node::OpSumKind { left, right, .. } => static_analysis_op_nodes(left, right),
+        Node::OpProductKind { left, right, .. } => static_analysis_op_nodes(left, right),
+        Node::OpPowerKind { left, right, .. } => static_analysis_op_nodes(left, right),
+        Node::CompareKind { left, right, .. } => static_analysis_op_nodes(left, right),
+
+        // defined names
+        Node::DefinedNameKind(_) => StaticResult::Unknown,
+        Node::WrongVariableKind(_) => StaticResult::Unknown,
+        Node::TableNameKind(_) => StaticResult::Unknown,
+        Node::FunctionKind { kind, args } => static_analysis_on_function(kind, args),
+        Node::ImplicitIntersection { .. } => StaticResult::Scalar,
+    }
+}
+
+// If all the arguments are scalars the function will return a scalar
+// If any of the arguments is a range or an array it will return an array
+fn scalar_arguments(args: &[Node]) -> StaticResult {
+    let mut n = 0;
+    let mut m = 0;
+    for arg in args {
+        match run_static_analysis_on_node(arg) {
+            StaticResult::Scalar => {
+                // noop
+            }
+            StaticResult::Array(a, b) | StaticResult::Range(a, b) => {
+                n = n.max(a);
+                m = m.max(b);
+            }
+            StaticResult::Unknown => return StaticResult::Unknown,
+        }
+    }
+    if n == 0 && m == 0 {
+        return StaticResult::Scalar;
+    }
+    StaticResult::Array(n, m)
+}
+
+// We only care if the function can return a range or not
+fn not_implemented(_args: &[Node]) -> StaticResult {
+    StaticResult::Scalar
+}
+
+fn static_analysis_offset(args: &[Node]) -> StaticResult {
+    // If first argument is a single cell reference and there are no4th and 5th argument,
+    // or they are 1, then it is a scalar
+    let arg_count = args.len();
+    if arg_count < 3 {
+        // Actually an error
+        return StaticResult::Scalar;
+    }
+    if !matches!(args[0], Node::ReferenceKind { .. }) {
+        return StaticResult::Unknown;
+    }
+    if arg_count == 3 {
+        return StaticResult::Scalar;
+    }
+    match args[3] {
+        Node::NumberKind(f) => {
+            if f != 1.0 {
+                return StaticResult::Unknown;
+            }
+        }
+        _ => return StaticResult::Unknown,
+    };
+    if arg_count == 4 {
+        return StaticResult::Scalar;
+    }
+    match args[4] {
+        Node::NumberKind(f) => {
+            if f != 1.0 {
+                return StaticResult::Unknown;
+            }
+        }
+        _ => return StaticResult::Unknown,
+    };
+    StaticResult::Unknown
+}
+
+// fn static_analysis_choose(_args: &[Node]) -> StaticResult {
+//     // We will always insert the @ in CHOOSE, but technically it is only needed if one of the elements is a range
+//     StaticResult::Unknown
+// }
+
+fn static_analysis_indirect(_args: &[Node]) -> StaticResult {
+    // We will always insert the @, but we don't need to do that in every scenario`
+    StaticResult::Unknown
+}
+
+fn static_analysis_index(_args: &[Node]) -> StaticResult {
+    // INDEX has two forms, but they are indistinguishable at parse time.
+    StaticResult::Unknown
+}
+
+#[derive(Clone)]
+enum Signature {
+    Scalar,
+    Vector,
+    Error,
+}
+
+fn args_signature_no_args(arg_count: usize) -> Vec<Signature> {
+    if arg_count == 0 {
+        vec![]
+    } else {
+        vec![Signature::Error; arg_count]
+    }
+}
+
+fn args_signature_scalars(
+    arg_count: usize,
+    required_count: usize,
+    optional_count: usize,
+) -> Vec<Signature> {
+    if arg_count >= required_count && arg_count <= required_count + optional_count {
+        vec![Signature::Scalar; arg_count]
+    } else {
+        vec![Signature::Error; arg_count]
+    }
+}
+
+fn args_signature_one_vector(arg_count: usize) -> Vec<Signature> {
+    if arg_count == 1 {
+        vec![Signature::Vector]
+    } else {
+        vec![Signature::Error; arg_count]
+    }
+}
+
+fn args_signature_sumif(arg_count: usize) -> Vec<Signature> {
+    if arg_count == 2 {
+        vec![Signature::Vector, Signature::Scalar]
+    } else if arg_count == 3 {
+        vec![Signature::Vector, Signature::Scalar, Signature::Vector]
+    } else {
+        vec![Signature::Error; arg_count]
+    }
+}
+
+// 1 or none scalars
+fn args_signature_sheet(arg_count: usize) -> Vec<Signature> {
+    if arg_count == 0 {
+        vec![]
+    } else if arg_count == 1 {
+        vec![Signature::Scalar]
+    } else {
+        vec![Signature::Error; arg_count]
+    }
+}
+
+fn args_signature_hlookup(arg_count: usize) -> Vec<Signature> {
+    if arg_count == 3 {
+        vec![Signature::Vector, Signature::Vector, Signature::Scalar]
+    } else if arg_count == 4 {
+        vec![
+            Signature::Vector,
+            Signature::Vector,
+            Signature::Scalar,
+            Signature::Vector,
+        ]
+    } else {
+        vec![Signature::Error; arg_count]
+    }
+}
+
+fn args_signature_index(arg_count: usize) -> Vec<Signature> {
+    if arg_count == 2 {
+        vec![Signature::Vector, Signature::Scalar]
+    } else if arg_count == 3 {
+        vec![Signature::Vector, Signature::Scalar, Signature::Scalar]
+    } else if arg_count == 4 {
+        vec![
+            Signature::Vector,
+            Signature::Scalar,
+            Signature::Scalar,
+            Signature::Scalar,
+        ]
+    } else {
+        vec![Signature::Error; arg_count]
+    }
+}
+
+fn args_signature_lookup(arg_count: usize) -> Vec<Signature> {
+    if arg_count == 2 {
+        vec![Signature::Vector, Signature::Vector]
+    } else if arg_count == 3 {
+        vec![Signature::Vector, Signature::Vector, Signature::Vector]
+    } else {
+        vec![Signature::Error; arg_count]
+    }
+}
+
+fn args_signature_match(arg_count: usize) -> Vec<Signature> {
+    if arg_count == 2 {
+        vec![Signature::Vector, Signature::Vector]
+    } else if arg_count == 3 {
+        vec![Signature::Vector, Signature::Vector, Signature::Scalar]
+    } else {
+        vec![Signature::Error; arg_count]
+    }
+}
+
+fn args_signature_offset(arg_count: usize) -> Vec<Signature> {
+    if arg_count == 3 {
+        vec![Signature::Vector, Signature::Scalar, Signature::Scalar]
+    } else if arg_count == 4 {
+        vec![
+            Signature::Vector,
+            Signature::Scalar,
+            Signature::Scalar,
+            Signature::Scalar,
+        ]
+    } else if arg_count == 5 {
+        vec![
+            Signature::Vector,
+            Signature::Scalar,
+            Signature::Scalar,
+            Signature::Scalar,
+            Signature::Scalar,
+        ]
+    } else {
+        vec![Signature::Error; arg_count]
+    }
+}
+
+fn args_signature_row(arg_count: usize) -> Vec<Signature> {
+    if arg_count == 0 {
+        vec![]
+    } else if arg_count == 1 {
+        vec![Signature::Vector]
+    } else {
+        vec![Signature::Error; arg_count]
+    }
+}
+
+fn args_signature_xlookup(arg_count: usize) -> Vec<Signature> {
+    if !(3..=6).contains(&arg_count) {
+        return vec![Signature::Error; arg_count];
+    }
+    let mut result = vec![Signature::Scalar; arg_count];
+    result[0] = Signature::Vector;
+    result[1] = Signature::Vector;
+    result[2] = Signature::Vector;
+    result
+}
+
+fn args_signature_textafter(arg_count: usize) -> Vec<Signature> {
+    if !(2..=6).contains(&arg_count) {
+        vec![Signature::Scalar; arg_count]
+    } else {
+        vec![Signature::Error; arg_count]
+    }
+}
+
+fn args_signature_textjoin(arg_count: usize) -> Vec<Signature> {
+    if arg_count >= 3 {
+        let mut result = vec![Signature::Vector; arg_count];
+        result[0] = Signature::Scalar;
+        result[1] = Signature::Scalar;
+        result
+    } else {
+        vec![Signature::Error; arg_count]
+    }
+}
+
+fn args_signature_npv(arg_count: usize) -> Vec<Signature> {
+    if arg_count < 2 {
+        return vec![Signature::Error; arg_count];
+    }
+    let mut result = vec![Signature::Vector; arg_count];
+    result[0] = Signature::Scalar;
+    result
+}
+
+fn args_signature_irr(arg_count: usize) -> Vec<Signature> {
+    if arg_count > 2 {
+        vec![Signature::Error; arg_count]
+    } else if arg_count == 1 {
+        vec![Signature::Vector]
+    } else {
+        vec![Signature::Vector, Signature::Scalar]
+    }
+}
+
+fn args_signature_xirr(arg_count: usize) -> Vec<Signature> {
+    if arg_count == 2 {
+        vec![Signature::Vector; arg_count]
+    } else if arg_count == 3 {
+        vec![Signature::Vector, Signature::Vector, Signature::Scalar]
+    } else {
+        vec![Signature::Error; arg_count]
+    }
+}
+
+fn args_signature_mirr(arg_count: usize) -> Vec<Signature> {
+    if arg_count != 3 {
+        vec![Signature::Error; arg_count]
+    } else {
+        vec![Signature::Vector, Signature::Scalar, Signature::Scalar]
+    }
+}
+
+fn args_signature_xnpv(arg_count: usize) -> Vec<Signature> {
+    if arg_count != 3 {
+        vec![Signature::Error; arg_count]
+    } else {
+        vec![Signature::Scalar, Signature::Vector, Signature::Vector]
+    }
+}
+
+// FIXME: This is terrible duplications of efforts. We use the signature in at least three different places:
+// 1. When computing the function
+// 2. Checking the arguments to see if we need to insert the implicit intersection operator
+// 3. Understanding the return value
+//
+// The signature of the functions should be defined only once
+
+// Given a function and a number of arguments this returns the arguments at each position
+// are expected to be scalars or vectors (array/ranges).
+// Sets signature::Error to all arguments if the number of arguments is incorrect.
+fn get_function_args_signature(kind: &Function, arg_count: usize) -> Vec<Signature> {
+    match kind {
+        Function::And => vec![Signature::Vector; arg_count],
+        Function::False => args_signature_no_args(arg_count),
+        Function::If => args_signature_scalars(arg_count, 2, 1),
+        Function::Iferror => args_signature_scalars(arg_count, 2, 0),
+        Function::Ifna => args_signature_scalars(arg_count, 2, 0),
+        Function::Ifs => vec![Signature::Scalar; arg_count],
+        Function::Not => args_signature_scalars(arg_count, 1, 0),
+        Function::Or => vec![Signature::Vector; arg_count],
+        Function::Switch => vec![Signature::Scalar; arg_count],
+        Function::True => args_signature_no_args(arg_count),
+        Function::Xor => vec![Signature::Vector; arg_count],
+        Function::Abs => args_signature_scalars(arg_count, 1, 0),
+        Function::Acos => args_signature_scalars(arg_count, 1, 0),
+        Function::Acosh => args_signature_scalars(arg_count, 1, 0),
+        Function::Asin => args_signature_scalars(arg_count, 1, 0),
+        Function::Asinh => args_signature_scalars(arg_count, 1, 0),
+        Function::Atan => args_signature_scalars(arg_count, 1, 0),
+        Function::Atan2 => args_signature_scalars(arg_count, 2, 0),
+        Function::Atanh => args_signature_scalars(arg_count, 1, 0),
+        Function::Choose => vec![Signature::Scalar; arg_count],
+        Function::Column => args_signature_row(arg_count),
+        Function::Columns => args_signature_one_vector(arg_count),
+        Function::Cos => args_signature_scalars(arg_count, 1, 0),
+        Function::Cosh => args_signature_scalars(arg_count, 1, 0),
+        Function::Max => vec![Signature::Vector; arg_count],
+        Function::Min => vec![Signature::Vector; arg_count],
+        Function::Pi => args_signature_no_args(arg_count),
+        Function::Power => args_signature_scalars(arg_count, 2, 0),
+        Function::Product => vec![Signature::Vector; arg_count],
+        Function::Round => args_signature_scalars(arg_count, 2, 0),
+        Function::Rounddown => args_signature_scalars(arg_count, 2, 0),
+        Function::Roundup => args_signature_scalars(arg_count, 2, 0),
+        Function::Sin => args_signature_scalars(arg_count, 1, 0),
+        Function::Sinh => args_signature_scalars(arg_count, 1, 0),
+        Function::Sqrt => args_signature_scalars(arg_count, 1, 0),
+        Function::Sqrtpi => args_signature_scalars(arg_count, 1, 0),
+        Function::Sum => vec![Signature::Vector; arg_count],
+        Function::Sumif => args_signature_sumif(arg_count),
+        Function::Sumifs => vec![Signature::Vector; arg_count],
+        Function::Tan => args_signature_scalars(arg_count, 1, 0),
+        Function::Tanh => args_signature_scalars(arg_count, 1, 0),
+        Function::ErrorType => args_signature_scalars(arg_count, 1, 0),
+        Function::Isblank => args_signature_scalars(arg_count, 1, 0),
+        Function::Iserr => args_signature_scalars(arg_count, 1, 0),
+        Function::Iserror => args_signature_scalars(arg_count, 1, 0),
+        Function::Iseven => args_signature_scalars(arg_count, 1, 0),
+        Function::Isformula => args_signature_scalars(arg_count, 1, 0),
+        Function::Islogical => args_signature_scalars(arg_count, 1, 0),
+        Function::Isna => args_signature_scalars(arg_count, 1, 0),
+        Function::Isnontext => args_signature_scalars(arg_count, 1, 0),
+        Function::Isnumber => args_signature_scalars(arg_count, 1, 0),
+        Function::Isodd => args_signature_scalars(arg_count, 1, 0),
+        Function::Isref => args_signature_one_vector(arg_count),
+        Function::Istext => args_signature_scalars(arg_count, 1, 0),
+        Function::Na => args_signature_no_args(arg_count),
+        Function::Sheet => args_signature_sheet(arg_count),
+        Function::Type => args_signature_one_vector(arg_count),
+        Function::Hlookup => args_signature_hlookup(arg_count),
+        Function::Index => args_signature_index(arg_count),
+        Function::Indirect => args_signature_scalars(arg_count, 1, 0),
+        Function::Lookup => args_signature_lookup(arg_count),
+        Function::Match => args_signature_match(arg_count),
+        Function::Offset => args_signature_offset(arg_count),
+        Function::Row => args_signature_row(arg_count),
+        Function::Rows => args_signature_one_vector(arg_count),
+        Function::Vlookup => args_signature_hlookup(arg_count),
+        Function::Xlookup => args_signature_xlookup(arg_count),
+        Function::Concat => vec![Signature::Vector; arg_count],
+        Function::Concatenate => vec![Signature::Scalar; arg_count],
+        Function::Exact => args_signature_scalars(arg_count, 2, 0),
+        Function::Find => args_signature_scalars(arg_count, 2, 1),
+        Function::Left => args_signature_scalars(arg_count, 1, 1),
+        Function::Len => args_signature_scalars(arg_count, 1, 0),
+        Function::Lower => args_signature_scalars(arg_count, 1, 0),
+        Function::Mid => args_signature_scalars(arg_count, 3, 0),
+        Function::Rept => args_signature_scalars(arg_count, 2, 0),
+        Function::Right => args_signature_scalars(arg_count, 2, 1),
+        Function::Search => args_signature_scalars(arg_count, 2, 1),
+        Function::Substitute => args_signature_scalars(arg_count, 3, 1),
+        Function::T => args_signature_scalars(arg_count, 1, 0),
+        Function::Text => args_signature_scalars(arg_count, 2, 0),
+        Function::Textafter => args_signature_textafter(arg_count),
+        Function::Textbefore => args_signature_textafter(arg_count),
+        Function::Textjoin => args_signature_textjoin(arg_count),
+        Function::Trim => args_signature_scalars(arg_count, 1, 0),
+        Function::Upper => args_signature_scalars(arg_count, 1, 0),
+        Function::Value => args_signature_scalars(arg_count, 1, 0),
+        Function::Valuetotext => args_signature_scalars(arg_count, 1, 1),
+        Function::Average => vec![Signature::Vector; arg_count],
+        Function::Averagea => vec![Signature::Vector; arg_count],
+        Function::Averageif => args_signature_sumif(arg_count),
+        Function::Averageifs => vec![Signature::Vector; arg_count],
+        Function::Count => vec![Signature::Vector; arg_count],
+        Function::Counta => vec![Signature::Vector; arg_count],
+        Function::Countblank => vec![Signature::Vector; arg_count],
+        Function::Countif => args_signature_sumif(arg_count),
+        Function::Countifs => vec![Signature::Vector; arg_count],
+        Function::Maxifs => vec![Signature::Vector; arg_count],
+        Function::Minifs => vec![Signature::Vector; arg_count],
+        Function::Date => args_signature_scalars(arg_count, 3, 0),
+        Function::Day => args_signature_scalars(arg_count, 1, 0),
+        Function::Edate => args_signature_scalars(arg_count, 2, 0),
+        Function::Eomonth => args_signature_scalars(arg_count, 2, 0),
+        Function::Month => args_signature_scalars(arg_count, 1, 0),
+        Function::Now => args_signature_no_args(arg_count),
+        Function::Today => args_signature_no_args(arg_count),
+        Function::Year => args_signature_scalars(arg_count, 1, 0),
+        Function::Cumipmt => args_signature_scalars(arg_count, 6, 0),
+        Function::Cumprinc => args_signature_scalars(arg_count, 6, 0),
+        Function::Db => args_signature_scalars(arg_count, 4, 1),
+        Function::Ddb => args_signature_scalars(arg_count, 4, 1),
+        Function::Dollarde => args_signature_scalars(arg_count, 2, 0),
+        Function::Dollarfr => args_signature_scalars(arg_count, 2, 0),
+        Function::Effect => args_signature_scalars(arg_count, 2, 0),
+        Function::Fv => args_signature_scalars(arg_count, 3, 2),
+        Function::Ipmt => args_signature_scalars(arg_count, 4, 2),
+        Function::Irr => args_signature_irr(arg_count),
+        Function::Ispmt => args_signature_scalars(arg_count, 4, 0),
+        Function::Mirr => args_signature_mirr(arg_count),
+        Function::Nominal => args_signature_scalars(arg_count, 2, 0),
+        Function::Nper => args_signature_scalars(arg_count, 3, 2),
+        Function::Npv => args_signature_npv(arg_count),
+        Function::Pduration => args_signature_scalars(arg_count, 3, 0),
+        Function::Pmt => args_signature_scalars(arg_count, 3, 2),
+        Function::Ppmt => args_signature_scalars(arg_count, 4, 2),
+        Function::Pv => args_signature_scalars(arg_count, 3, 2),
+        Function::Rate => args_signature_scalars(arg_count, 3, 3),
+        Function::Rri => args_signature_scalars(arg_count, 3, 0),
+        Function::Sln => args_signature_scalars(arg_count, 3, 0),
+        Function::Syd => args_signature_scalars(arg_count, 4, 0),
+        Function::Tbilleq => args_signature_scalars(arg_count, 3, 0),
+        Function::Tbillprice => args_signature_scalars(arg_count, 3, 0),
+        Function::Tbillyield => args_signature_scalars(arg_count, 3, 0),
+        Function::Xirr => args_signature_xirr(arg_count),
+        Function::Xnpv => args_signature_xnpv(arg_count),
+        Function::Besseli => args_signature_scalars(arg_count, 2, 0),
+        Function::Besselj => args_signature_scalars(arg_count, 2, 0),
+        Function::Besselk => args_signature_scalars(arg_count, 2, 0),
+        Function::Bessely => args_signature_scalars(arg_count, 2, 0),
+        Function::Erf => args_signature_scalars(arg_count, 1, 1),
+        Function::Erfc => args_signature_scalars(arg_count, 1, 0),
+        Function::ErfcPrecise => args_signature_scalars(arg_count, 1, 0),
+        Function::ErfPrecise => args_signature_scalars(arg_count, 1, 0),
+        Function::Bin2dec => args_signature_scalars(arg_count, 1, 0),
+        Function::Bin2hex => args_signature_scalars(arg_count, 1, 0),
+        Function::Bin2oct => args_signature_scalars(arg_count, 1, 0),
+        Function::Dec2Bin => args_signature_scalars(arg_count, 1, 0),
+        Function::Dec2hex => args_signature_scalars(arg_count, 1, 0),
+        Function::Dec2oct => args_signature_scalars(arg_count, 1, 0),
+        Function::Hex2bin => args_signature_scalars(arg_count, 1, 0),
+        Function::Hex2dec => args_signature_scalars(arg_count, 1, 0),
+        Function::Hex2oct => args_signature_scalars(arg_count, 1, 0),
+        Function::Oct2bin => args_signature_scalars(arg_count, 1, 0),
+        Function::Oct2dec => args_signature_scalars(arg_count, 1, 0),
+        Function::Oct2hex => args_signature_scalars(arg_count, 1, 0),
+        Function::Bitand => args_signature_scalars(arg_count, 2, 0),
+        Function::Bitlshift => args_signature_scalars(arg_count, 2, 0),
+        Function::Bitor => args_signature_scalars(arg_count, 2, 0),
+        Function::Bitrshift => args_signature_scalars(arg_count, 2, 0),
+        Function::Bitxor => args_signature_scalars(arg_count, 2, 0),
+        Function::Complex => args_signature_scalars(arg_count, 2, 1),
+        Function::Imabs => args_signature_scalars(arg_count, 1, 0),
+        Function::Imaginary => args_signature_scalars(arg_count, 1, 0),
+        Function::Imargument => args_signature_scalars(arg_count, 1, 0),
+        Function::Imconjugate => args_signature_scalars(arg_count, 1, 0),
+        Function::Imcos => args_signature_scalars(arg_count, 1, 0),
+        Function::Imcosh => args_signature_scalars(arg_count, 1, 0),
+        Function::Imcot => args_signature_scalars(arg_count, 1, 0),
+        Function::Imcsc => args_signature_scalars(arg_count, 1, 0),
+        Function::Imcsch => args_signature_scalars(arg_count, 1, 0),
+        Function::Imdiv => args_signature_scalars(arg_count, 2, 0),
+        Function::Imexp => args_signature_scalars(arg_count, 1, 0),
+        Function::Imln => args_signature_scalars(arg_count, 1, 0),
+        Function::Imlog10 => args_signature_scalars(arg_count, 1, 0),
+        Function::Imlog2 => args_signature_scalars(arg_count, 1, 0),
+        Function::Impower => args_signature_scalars(arg_count, 2, 0),
+        Function::Improduct => args_signature_scalars(arg_count, 2, 0),
+        Function::Imreal => args_signature_scalars(arg_count, 1, 0),
+        Function::Imsec => args_signature_scalars(arg_count, 1, 0),
+        Function::Imsech => args_signature_scalars(arg_count, 1, 0),
+        Function::Imsin => args_signature_scalars(arg_count, 1, 0),
+        Function::Imsinh => args_signature_scalars(arg_count, 1, 0),
+        Function::Imsqrt => args_signature_scalars(arg_count, 1, 0),
+        Function::Imsub => args_signature_scalars(arg_count, 2, 0),
+        Function::Imsum => args_signature_scalars(arg_count, 2, 0),
+        Function::Imtan => args_signature_scalars(arg_count, 1, 0),
+        Function::Convert => args_signature_scalars(arg_count, 3, 0),
+        Function::Delta => args_signature_scalars(arg_count, 1, 1),
+        Function::Gestep => args_signature_scalars(arg_count, 1, 1),
+        Function::Subtotal => args_signature_npv(arg_count),
+        Function::Rand => args_signature_no_args(arg_count),
+        Function::Randbetween => args_signature_scalars(arg_count, 2, 0),
+        Function::Formulatext => args_signature_scalars(arg_count, 1, 0),
+        Function::Unicode => args_signature_scalars(arg_count, 1, 0),
+        Function::Geomean => vec![Signature::Vector; arg_count],
+    }
+}
+
+// Returns the type of the result (Scalar, Array or Range) depending on the arguments
+fn static_analysis_on_function(kind: &Function, args: &[Node]) -> StaticResult {
+    match kind {
+        Function::And => StaticResult::Scalar,
+        Function::False => StaticResult::Scalar,
+        Function::If => scalar_arguments(args),
+        Function::Iferror => scalar_arguments(args),
+        Function::Ifna => scalar_arguments(args),
+        Function::Ifs => not_implemented(args),
+        Function::Not => StaticResult::Scalar,
+        Function::Or => StaticResult::Scalar,
+        Function::Switch => not_implemented(args),
+        Function::True => StaticResult::Scalar,
+        Function::Xor => StaticResult::Scalar,
+        Function::Abs => scalar_arguments(args),
+        Function::Acos => scalar_arguments(args),
+        Function::Acosh => scalar_arguments(args),
+        Function::Asin => scalar_arguments(args),
+        Function::Asinh => scalar_arguments(args),
+        Function::Atan => scalar_arguments(args),
+        Function::Atan2 => scalar_arguments(args),
+        Function::Atanh => scalar_arguments(args),
+        Function::Choose => scalar_arguments(args), // static_analysis_choose(args, cell),
+        Function::Column => not_implemented(args),
+        Function::Columns => not_implemented(args),
+        Function::Cos => scalar_arguments(args),
+        Function::Cosh => scalar_arguments(args),
+        Function::Max => StaticResult::Scalar,
+        Function::Min => StaticResult::Scalar,
+        Function::Pi => StaticResult::Scalar,
+        Function::Power => scalar_arguments(args),
+        Function::Product => not_implemented(args),
+        Function::Round => scalar_arguments(args),
+        Function::Rounddown => scalar_arguments(args),
+        Function::Roundup => scalar_arguments(args),
+        Function::Sin => scalar_arguments(args),
+        Function::Sinh => scalar_arguments(args),
+        Function::Sqrt => scalar_arguments(args),
+        Function::Sqrtpi => StaticResult::Scalar,
+        Function::Sum => StaticResult::Scalar,
+        Function::Sumif => not_implemented(args),
+        Function::Sumifs => not_implemented(args),
+        Function::Tan => scalar_arguments(args),
+        Function::Tanh => scalar_arguments(args),
+        Function::ErrorType => not_implemented(args),
+        Function::Isblank => not_implemented(args),
+        Function::Iserr => not_implemented(args),
+        Function::Iserror => not_implemented(args),
+        Function::Iseven => not_implemented(args),
+        Function::Isformula => not_implemented(args),
+        Function::Islogical => not_implemented(args),
+        Function::Isna => not_implemented(args),
+        Function::Isnontext => not_implemented(args),
+        Function::Isnumber => not_implemented(args),
+        Function::Isodd => not_implemented(args),
+        Function::Isref => not_implemented(args),
+        Function::Istext => not_implemented(args),
+        Function::Na => StaticResult::Scalar,
+        Function::Sheet => StaticResult::Scalar,
+        Function::Type => not_implemented(args),
+        Function::Hlookup => not_implemented(args),
+        Function::Index => static_analysis_index(args),
+        Function::Indirect => static_analysis_indirect(args),
+        Function::Lookup => not_implemented(args),
+        Function::Match => not_implemented(args),
+        Function::Offset => static_analysis_offset(args),
+        // FIXME: Row could return an array
+        Function::Row => StaticResult::Scalar,
+        Function::Rows => not_implemented(args),
+        Function::Vlookup => not_implemented(args),
+        Function::Xlookup => not_implemented(args),
+        Function::Concat => not_implemented(args),
+        Function::Concatenate => not_implemented(args),
+        Function::Exact => not_implemented(args),
+        Function::Find => not_implemented(args),
+        Function::Left => not_implemented(args),
+        Function::Len => not_implemented(args),
+        Function::Lower => not_implemented(args),
+        Function::Mid => not_implemented(args),
+        Function::Rept => not_implemented(args),
+        Function::Right => not_implemented(args),
+        Function::Search => not_implemented(args),
+        Function::Substitute => not_implemented(args),
+        Function::T => not_implemented(args),
+        Function::Text => not_implemented(args),
+        Function::Textafter => not_implemented(args),
+        Function::Textbefore => not_implemented(args),
+        Function::Textjoin => not_implemented(args),
+        Function::Trim => not_implemented(args),
+        Function::Unicode => not_implemented(args),
+        Function::Upper => not_implemented(args),
+        Function::Value => not_implemented(args),
+        Function::Valuetotext => not_implemented(args),
+        Function::Average => not_implemented(args),
+        Function::Averagea => not_implemented(args),
+        Function::Averageif => not_implemented(args),
+        Function::Averageifs => not_implemented(args),
+        Function::Count => not_implemented(args),
+        Function::Counta => not_implemented(args),
+        Function::Countblank => not_implemented(args),
+        Function::Countif => not_implemented(args),
+        Function::Countifs => not_implemented(args),
+        Function::Maxifs => not_implemented(args),
+        Function::Minifs => not_implemented(args),
+        Function::Date => not_implemented(args),
+        Function::Day => not_implemented(args),
+        Function::Edate => not_implemented(args),
+        Function::Month => not_implemented(args),
+        Function::Now => not_implemented(args),
+        Function::Today => not_implemented(args),
+        Function::Year => not_implemented(args),
+        Function::Cumipmt => not_implemented(args),
+        Function::Cumprinc => not_implemented(args),
+        Function::Db => not_implemented(args),
+        Function::Ddb => not_implemented(args),
+        Function::Dollarde => not_implemented(args),
+        Function::Dollarfr => not_implemented(args),
+        Function::Effect => not_implemented(args),
+        Function::Fv => not_implemented(args),
+        Function::Ipmt => not_implemented(args),
+        Function::Irr => not_implemented(args),
+        Function::Ispmt => not_implemented(args),
+        Function::Mirr => not_implemented(args),
+        Function::Nominal => not_implemented(args),
+        Function::Nper => not_implemented(args),
+        Function::Npv => not_implemented(args),
+        Function::Pduration => not_implemented(args),
+        Function::Pmt => not_implemented(args),
+        Function::Ppmt => not_implemented(args),
+        Function::Pv => not_implemented(args),
+        Function::Rate => not_implemented(args),
+        Function::Rri => not_implemented(args),
+        Function::Sln => not_implemented(args),
+        Function::Syd => not_implemented(args),
+        Function::Tbilleq => not_implemented(args),
+        Function::Tbillprice => not_implemented(args),
+        Function::Tbillyield => not_implemented(args),
+        Function::Xirr => not_implemented(args),
+        Function::Xnpv => not_implemented(args),
+        Function::Besseli => scalar_arguments(args),
+        Function::Besselj => scalar_arguments(args),
+        Function::Besselk => scalar_arguments(args),
+        Function::Bessely => scalar_arguments(args),
+        Function::Erf => scalar_arguments(args),
+        Function::Erfc => scalar_arguments(args),
+        Function::ErfcPrecise => scalar_arguments(args),
+        Function::ErfPrecise => scalar_arguments(args),
+        Function::Bin2dec => scalar_arguments(args),
+        Function::Bin2hex => scalar_arguments(args),
+        Function::Bin2oct => scalar_arguments(args),
+        Function::Dec2Bin => scalar_arguments(args),
+        Function::Dec2hex => scalar_arguments(args),
+        Function::Dec2oct => scalar_arguments(args),
+        Function::Hex2bin => scalar_arguments(args),
+        Function::Hex2dec => scalar_arguments(args),
+        Function::Hex2oct => scalar_arguments(args),
+        Function::Oct2bin => scalar_arguments(args),
+        Function::Oct2dec => scalar_arguments(args),
+        Function::Oct2hex => scalar_arguments(args),
+        Function::Bitand => scalar_arguments(args),
+        Function::Bitlshift => scalar_arguments(args),
+        Function::Bitor => scalar_arguments(args),
+        Function::Bitrshift => scalar_arguments(args),
+        Function::Bitxor => scalar_arguments(args),
+        Function::Complex => scalar_arguments(args),
+        Function::Imabs => scalar_arguments(args),
+        Function::Imaginary => scalar_arguments(args),
+        Function::Imargument => scalar_arguments(args),
+        Function::Imconjugate => scalar_arguments(args),
+        Function::Imcos => scalar_arguments(args),
+        Function::Imcosh => scalar_arguments(args),
+        Function::Imcot => scalar_arguments(args),
+        Function::Imcsc => scalar_arguments(args),
+        Function::Imcsch => scalar_arguments(args),
+        Function::Imdiv => scalar_arguments(args),
+        Function::Imexp => scalar_arguments(args),
+        Function::Imln => scalar_arguments(args),
+        Function::Imlog10 => scalar_arguments(args),
+        Function::Imlog2 => scalar_arguments(args),
+        Function::Impower => scalar_arguments(args),
+        Function::Improduct => scalar_arguments(args),
+        Function::Imreal => scalar_arguments(args),
+        Function::Imsec => scalar_arguments(args),
+        Function::Imsech => scalar_arguments(args),
+        Function::Imsin => scalar_arguments(args),
+        Function::Imsinh => scalar_arguments(args),
+        Function::Imsqrt => scalar_arguments(args),
+        Function::Imsub => scalar_arguments(args),
+        Function::Imsum => scalar_arguments(args),
+        Function::Imtan => scalar_arguments(args),
+        Function::Convert => not_implemented(args),
+        Function::Delta => not_implemented(args),
+        Function::Gestep => not_implemented(args),
+        Function::Subtotal => not_implemented(args),
+        Function::Rand => not_implemented(args),
+        Function::Randbetween => scalar_arguments(args),
+        Function::Eomonth => scalar_arguments(args),
+        Function::Formulatext => not_implemented(args),
+        Function::Geomean => not_implemented(args),
+    }
+}

base/src/expressions/parser/stringify.rs

@@ -1,5 +1,7 @@
 use super::{super::utils::quote_name, Node, Reference};
 use crate::constants::{LAST_COLUMN, LAST_ROW};
+use crate::expressions::parser::move_formula::to_string_array_node;
+use crate::expressions::parser::static_analysis::add_implicit_intersection;
 use crate::expressions::token::OpUnary;
 use crate::{expressions::types::CellReferenceRC, number_format::to_excel_precision_str};
 
@@ -34,10 +36,21 @@ pub enum DisplaceData {
     None,
 }
 
+/// This is the internal mode in IronCalc
 pub fn to_rc_format(node: &Node) -> String {
     stringify(node, None, &DisplaceData::None, false)
 }
 
+/// This is the mode used to display the formula in the UI
+pub fn to_string(node: &Node, context: &CellReferenceRC) -> String {
+    stringify(node, Some(context), &DisplaceData::None, false)
+}
+
+/// This is the mode used to export the formula to Excel
+pub fn to_excel_string(node: &Node, context: &CellReferenceRC) -> String {
+    stringify(node, Some(context), &DisplaceData::None, true)
+}
+
 pub fn to_string_displaced(
     node: &Node,
     context: &CellReferenceRC,
@@ -46,18 +59,10 @@ pub fn to_string_displaced(
     stringify(node, Some(context), displace_data, false)
 }
 
-pub fn to_string(node: &Node, context: &CellReferenceRC) -> String {
-    stringify(node, Some(context), &DisplaceData::None, false)
-}
-
-pub fn to_excel_string(node: &Node, context: &CellReferenceRC) -> String {
-    stringify(node, Some(context), &DisplaceData::None, true)
-}
-
 /// Converts a local reference to a string applying some displacement if needed.
 /// It uses A1 style if context is not None. If context is None it uses R1C1 style
 /// If full_row is true then the row details will be omitted in the A1 case
-/// If full_colum is true then column details will be omitted.
+/// If full_column is true then column details will be omitted.
 pub(crate) fn stringify_reference(
     context: Option<&CellReferenceRC>,
     displace_data: &DisplaceData,
@@ -179,16 +184,16 @@ pub(crate) fn stringify_reference(
                 return "#REF!".to_string();
             }
             let mut row_abs = if absolute_row {
-                format!("${}", row)
+                format!("${row}")
             } else {
-                format!("{}", row)
+                format!("{row}")
             };
             let column = match crate::expressions::utils::number_to_column(column) {
                 Some(s) => s,
                 None => return "#REF!".to_string(),
             };
             let mut col_abs = if absolute_column {
-                format!("${}", column)
+                format!("${column}")
             } else {
                 column
             };
@@ -203,27 +208,27 @@ pub(crate) fn stringify_reference(
                     format!("{}!{}{}", quote_name(name), col_abs, row_abs)
                 }
                 None => {
-                    format!("{}{}", col_abs, row_abs)
+                    format!("{col_abs}{row_abs}")
                 }
             }
         }
         None => {
             let row_abs = if absolute_row {
-                format!("R{}", row)
+                format!("R{row}")
             } else {
-                format!("R[{}]", row)
+                format!("R[{row}]")
             };
             let col_abs = if absolute_column {
-                format!("C{}", column)
+                format!("C{column}")
             } else {
-                format!("C[{}]", column)
+                format!("C[{column}]")
             };
             match &sheet_name {
                 Some(name) => {
                     format!("{}!{}{}", quote_name(name), row_abs, col_abs)
                 }
                 None => {
-                    format!("{}{}", row_abs, col_abs)
+                    format!("{row_abs}{col_abs}")
                 }
             }
         }
@@ -235,7 +240,7 @@ fn format_function(
     args: &Vec<Node>,
     context: Option<&CellReferenceRC>,
     displace_data: &DisplaceData,
-    use_original_name: bool,
+    export_to_excel: bool,
 ) -> String {
     let mut first = true;
     let mut arguments = "".to_string();
@@ -244,27 +249,52 @@ fn format_function(
             arguments = format!(
                 "{},{}",
                 arguments,
-                stringify(el, context, displace_data, use_original_name)
+                stringify(el, context, displace_data, export_to_excel)
             );
         } else {
             first = false;
-            arguments = stringify(el, context, displace_data, use_original_name);
+            arguments = stringify(el, context, displace_data, export_to_excel);
         }
     }
-    format!("{}({})", name, arguments)
+    format!("{name}({arguments})")
 }
 
+// There is just one representation in the AST (Abstract Syntax Tree) of a formula.
+// But three different ways to convert it to a string.
+//
+// To stringify a formula we need a "context", that is in which cell are we doing the "stringifying"
+//
+// But there are three ways to stringify a formula:
+//
+// * To show it to the IronCalc user
+// * To store internally
+// * To export to Excel
+//
+// There are, of course correspondingly three "modes" when parsing a formula.
+//
+// The internal representation is the more different as references are stored in the RC representation.
+// The the AST of the formula is kept close to this representation we don't need a context
+//
+// In the export to Excel representation certain things are different:
+// * We add a _xlfn. in front of some (more modern) functions
+// * We remove the Implicit Intersection operator when it is automatic and add _xlfn.SINGLE when it is not
+//
+// Examples:
+// * =A1+B2
+// * =RC+R1C1
+// * =A1+B1
+
 fn stringify(
     node: &Node,
     context: Option<&CellReferenceRC>,
     displace_data: &DisplaceData,
-    use_original_name: bool,
+    export_to_excel: bool,
 ) -> String {
     use self::Node::*;
     match node {
-        BooleanKind(value) => format!("{}", value).to_ascii_uppercase(),
+        BooleanKind(value) => format!("{value}").to_ascii_uppercase(),
         NumberKind(number) => to_excel_precision_str(*number),
-        StringKind(value) => format!("\"{}\"", value),
+        StringKind(value) => format!("\"{value}\""),
         WrongReferenceKind {
             sheet_name,
             column,
@@ -354,7 +384,7 @@ fn stringify(
                 full_row,
                 full_column,
             );
-            format!("{}:{}", s1, s2)
+            format!("{s1}:{s2}")
         }
         WrongRangeKind {
             sheet_name,
@@ -403,58 +433,58 @@ fn stringify(
                 full_row,
                 full_column,
             );
-            format!("{}:{}", s1, s2)
+            format!("{s1}:{s2}")
         }
         OpRangeKind { left, right } => format!(
             "{}:{}",
-            stringify(left, context, displace_data, use_original_name),
+            stringify(left, context, displace_data, export_to_excel),
-            stringify(right, context, displace_data, use_original_name)
+            stringify(right, context, displace_data, export_to_excel)
         ),
         OpConcatenateKind { left, right } => format!(
             "{}&{}",
-            stringify(left, context, displace_data, use_original_name),
+            stringify(left, context, displace_data, export_to_excel),
-            stringify(right, context, displace_data, use_original_name)
+            stringify(right, context, displace_data, export_to_excel)
         ),
         CompareKind { kind, left, right } => format!(
             "{}{}{}",
-            stringify(left, context, displace_data, use_original_name),
+            stringify(left, context, displace_data, export_to_excel),
             kind,
-            stringify(right, context, displace_data, use_original_name)
+            stringify(right, context, displace_data, export_to_excel)
         ),
         OpSumKind { kind, left, right } => format!(
             "{}{}{}",
-            stringify(left, context, displace_data, use_original_name),
+            stringify(left, context, displace_data, export_to_excel),
             kind,
-            stringify(right, context, displace_data, use_original_name)
+            stringify(right, context, displace_data, export_to_excel)
         ),
         OpProductKind { kind, left, right } => {
             let x = match **left {
                 OpSumKind { .. } => format!(
                     "({})",
-                    stringify(left, context, displace_data, use_original_name)
+                    stringify(left, context, displace_data, export_to_excel)
                 ),
                 CompareKind { .. } => format!(
                     "({})",
-                    stringify(left, context, displace_data, use_original_name)
+                    stringify(left, context, displace_data, export_to_excel)
                 ),
-                _ => stringify(left, context, displace_data, use_original_name),
+                _ => stringify(left, context, displace_data, export_to_excel),
             };
             let y = match **right {
                 OpSumKind { .. } => format!(
                     "({})",
-                    stringify(right, context, displace_data, use_original_name)
+                    stringify(right, context, displace_data, export_to_excel)
                 ),
                 CompareKind { .. } => format!(
                     "({})",
-                    stringify(right, context, displace_data, use_original_name)
+                    stringify(right, context, displace_data, export_to_excel)
                 ),
                 OpProductKind { .. } => format!(
                     "({})",
-                    stringify(right, context, displace_data, use_original_name)
+                    stringify(right, context, displace_data, export_to_excel)
                 ),
-                _ => stringify(right, context, displace_data, use_original_name),
+                _ => stringify(right, context, displace_data, export_to_excel),
             };
-            format!("{}{}{}", x, kind, y)
+            format!("{x}{kind}{y}")
         }
         OpPowerKind { left, right } => {
             let x = match **left {
@@ -467,9 +497,7 @@ fn stringify(
                 | DefinedNameKind(_)
                 | TableNameKind(_)
                 | WrongVariableKind(_)
-                | WrongRangeKind { .. } => {
+                | WrongRangeKind { .. } => stringify(left, context, displace_data, export_to_excel),
-                    stringify(left, context, displace_data, use_original_name)
-                }
                 OpRangeKind { .. }
                 | OpConcatenateKind { .. }
                 | OpProductKind { .. }
@@ -482,9 +510,10 @@ fn stringify(
                 | ParseErrorKind { .. }
                 | OpSumKind { .. }
                 | CompareKind { .. }
+                | ImplicitIntersection { .. }
                 | EmptyArgKind => format!(
                     "({})",
-                    stringify(left, context, displace_data, use_original_name)
+                    stringify(left, context, displace_data, export_to_excel)
                 ),
             };
             let y = match **right {
@@ -498,7 +527,7 @@ fn stringify(
                 | TableNameKind(_)
                 | WrongVariableKind(_)
                 | WrongRangeKind { .. } => {
-                    stringify(right, context, displace_data, use_original_name)
+                    stringify(right, context, displace_data, export_to_excel)
                 }
                 OpRangeKind { .. }
                 | OpConcatenateKind { .. }
@@ -512,65 +541,96 @@ fn stringify(
                 | ParseErrorKind { .. }
                 | OpSumKind { .. }
                 | CompareKind { .. }
+                | ImplicitIntersection { .. }
                 | EmptyArgKind => format!(
                     "({})",
-                    stringify(right, context, displace_data, use_original_name)
+                    stringify(right, context, displace_data, export_to_excel)
                 ),
             };
-            format!("{}^{}", x, y)
+            format!("{x}^{y}")
         }
         InvalidFunctionKind { name, args } => {
-            format_function(name, args, context, displace_data, use_original_name)
+            format_function(name, args, context, displace_data, export_to_excel)
         }
         FunctionKind { kind, args } => {
-            let name = if use_original_name {
+            let name = if export_to_excel {
                 kind.to_xlsx_string()
             } else {
                 kind.to_string()
             };
-            format_function(&name, args, context, displace_data, use_original_name)
+            format_function(&name, args, context, displace_data, export_to_excel)
         }
         ArrayKind(args) => {
-            let mut first = true;
+            let mut first_row = true;
-            let mut arguments = "".to_string();
+            let mut matrix_string = String::new();
-            for el in args {
+
-                if !first {
+            for row in args {
-                    arguments = format!(
+                if !first_row {
-                        "{},{}",
+                    matrix_string.push(';');
-                        arguments,
-                        stringify(el, context, displace_data, use_original_name)
-                    );
                 } else {
-                    first = false;
+                    first_row = false;
-                    arguments = stringify(el, context, displace_data, use_original_name);
                 }
+                let mut first_column = true;
+                let mut row_string = String::new();
+                for el in row {
+                    if !first_column {
+                        row_string.push(',');
+                    } else {
+                        first_column = false;
                     }
-            format!("{{{}}}", arguments)
+                    row_string.push_str(&to_string_array_node(el));
+                }
+                matrix_string.push_str(&row_string);
+            }
+            format!("{{{matrix_string}}}")
         }
         TableNameKind(value) => value.to_string(),
-        DefinedNameKind((name, _)) => name.to_string(),
+        DefinedNameKind((name, ..)) => name.to_string(),
         WrongVariableKind(name) => name.to_string(),
         UnaryKind { kind, right } => match kind {
             OpUnary::Minus => {
                 format!(
                     "-{}",
-                    stringify(right, context, displace_data, use_original_name)
+                    stringify(right, context, displace_data, export_to_excel)
                 )
             }
             OpUnary::Percentage => {
                 format!(
                     "{}%",
-                    stringify(right, context, displace_data, use_original_name)
+                    stringify(right, context, displace_data, export_to_excel)
                 )
             }
         },
-        ErrorKind(kind) => format!("{}", kind),
+        ErrorKind(kind) => format!("{kind}"),
         ParseErrorKind {
             formula,
             position: _,
             message: _,
         } => formula.to_string(),
         EmptyArgKind => "".to_string(),
+        ImplicitIntersection {
+            automatic: _,
+            child,
+        } => {
+            if export_to_excel {
+                // We need to check wether the II can be automatic or not
+                let mut new_node = child.as_ref().clone();
+
+                add_implicit_intersection(&mut new_node, true);
+                if matches!(&new_node, Node::ImplicitIntersection { .. }) {
+                    return stringify(child, context, displace_data, export_to_excel);
+                }
+
+                return format!(
+                    "_xlfn.SINGLE({})",
+                    stringify(child, context, displace_data, export_to_excel)
+                );
+            }
+            format!(
+                "@{}",
+                stringify(child, context, displace_data, export_to_excel)
+            )
+        }
     }
 }
 
@@ -658,6 +718,12 @@ pub(crate) fn rename_sheet_in_node(node: &mut Node, sheet_index: u32, new_name:
         Node::UnaryKind { kind: _, right } => {
             rename_sheet_in_node(right, sheet_index, new_name);
         }
+        Node::ImplicitIntersection {
+            automatic: _,
+            child,
+        } => {
+            rename_sheet_in_node(child, sheet_index, new_name);
+        }
 
         // Do nothing
         Node::BooleanKind(_) => {}
@@ -681,7 +747,7 @@ pub(crate) fn rename_defined_name_in_node(
 ) {
     match node {
         // Rename
-        Node::DefinedNameKind((n, s)) => {
+        Node::DefinedNameKind((n, s, _)) => {
             if name.to_lowercase() == n.to_lowercase() && *s == scope {
                 *n = new_name.to_string();
             }
@@ -736,6 +802,12 @@ pub(crate) fn rename_defined_name_in_node(
         Node::UnaryKind { kind: _, right } => {
             rename_defined_name_in_node(right, name, scope, new_name);
         }
+        Node::ImplicitIntersection {
+            automatic: _,
+            child,
+        } => {
+            rename_defined_name_in_node(child, name, scope, new_name);
+        }
 
         // Do nothing
         Node::BooleanKind(_) => {}

base/src/expressions/parser/tests/mod.rs

@@ -1,4 +1,7 @@
+mod test_add_implicit_intersection;
+mod test_arrays;
 mod test_general;
+mod test_implicit_intersection;
 mod test_issue_155;
 mod test_move_formula;
 mod test_ranges;

base/src/expressions/parser/tests/test_add_implicit_intersection.rs

@@ -0,0 +1,80 @@
+use std::collections::HashMap;
+
+use crate::expressions::{
+    parser::{
+        stringify::{to_excel_string, to_string},
+        Parser,
+    },
+    types::CellReferenceRC,
+};
+
+use crate::expressions::parser::static_analysis::add_implicit_intersection;
+
+#[test]
+fn simple_test() {
+    let worksheets = vec!["Sheet1".to_string()];
+    let mut parser = Parser::new(worksheets, vec![], HashMap::new());
+
+    // Reference cell is Sheet1!A1
+    let cell_reference = CellReferenceRC {
+        sheet: "Sheet1".to_string(),
+        row: 1,
+        column: 1,
+    };
+    let cases = vec![
+        ("A1:A10*SUM(A1:A10)", "@A1:A10*SUM(A1:A10)"),
+        ("A1:A10", "@A1:A10"),
+        // Math and trigonometry functions
+        ("SUM(A1:A10)", "SUM(A1:A10)"),
+        ("SIN(A1:A10)", "SIN(@A1:A10)"),
+        ("COS(A1:A10)", "COS(@A1:A10)"),
+        ("TAN(A1:A10)", "TAN(@A1:A10)"),
+        ("ASIN(A1:A10)", "ASIN(@A1:A10)"),
+        ("ACOS(A1:A10)", "ACOS(@A1:A10)"),
+        ("ATAN(A1:A10)", "ATAN(@A1:A10)"),
+        ("SINH(A1:A10)", "SINH(@A1:A10)"),
+        ("COSH(A1:A10)", "COSH(@A1:A10)"),
+        ("TANH(A1:A10)", "TANH(@A1:A10)"),
+        ("ASINH(A1:A10)", "ASINH(@A1:A10)"),
+        ("ACOSH(A1:A10)", "ACOSH(@A1:A10)"),
+        ("ATANH(A1:A10)", "ATANH(@A1:A10)"),
+        ("ATAN2(A1:A10,B1:B10)", "ATAN2(@A1:A10,@B1:B10)"),
+        ("ATAN2(A1:A10,A1)", "ATAN2(@A1:A10,A1)"),
+        ("SQRT(A1:A10)", "SQRT(@A1:A10)"),
+        ("SQRTPI(A1:A10)", "SQRTPI(@A1:A10)"),
+        ("POWER(A1:A10,A1)", "POWER(@A1:A10,A1)"),
+        ("POWER(A1:A10,B1:B10)", "POWER(@A1:A10,@B1:B10)"),
+        ("MAX(A1:A10)", "MAX(A1:A10)"),
+        ("MIN(A1:A10)", "MIN(A1:A10)"),
+        ("ABS(A1:A10)", "ABS(@A1:A10)"),
+        ("FALSE()", "FALSE()"),
+        ("TRUE()", "TRUE()"),
+        // Defined names
+        ("BADNMAE", "@BADNMAE"),
+        // Logical
+        ("AND(A1:A10)", "AND(A1:A10)"),
+        ("OR(A1:A10)", "OR(A1:A10)"),
+        ("NOT(A1:A10)", "NOT(@A1:A10)"),
+        ("IF(A1:A10,B1:B10,C1:C10)", "IF(@A1:A10,@B1:B10,@C1:C10)"),
+        // Information
+        // ("ISBLANK(A1:A10)", "ISBLANK(A1:A10)"),
+        // ("ISERR(A1:A10)", "ISERR(A1:A10)"),
+        // ("ISERROR(A1:A10)", "ISERROR(A1:A10)"),
+        // ("ISEVEN(A1:A10)", "ISEVEN(A1:A10)"),
+        // ("ISLOGICAL(A1:A10)", "ISLOGICAL(A1:A10)"),
+        // ("ISNA(A1:A10)", "ISNA(A1:A10)"),
+        // ("ISNONTEXT(A1:A10)", "ISNONTEXT(A1:A10)"),
+        // ("ISNUMBER(A1:A10)", "ISNUMBER(A1:A10)"),
+        // ("ISODD(A1:A10)", "ISODD(A1:A10)"),
+        // ("ISREF(A1:A10)", "ISREF(A1:A10)"),
+        // ("ISTEXT(A1:A10)", "ISTEXT(A1:A10)"),
+    ];
+    for (formula, expected) in cases {
+        let mut t = parser.parse(formula, &cell_reference);
+        add_implicit_intersection(&mut t, true);
+        let r = to_string(&t, &cell_reference);
+        assert_eq!(r, expected);
+        let excel_formula = to_excel_string(&t, &cell_reference);
+        assert_eq!(excel_formula, formula);
+    }
+}

base/src/expressions/parser/tests/test_arrays.rs

@@ -0,0 +1,92 @@
+#![allow(clippy::panic)]
+
+use std::collections::HashMap;
+
+use crate::expressions::parser::stringify::{to_rc_format, to_string};
+use crate::expressions::parser::{ArrayNode, Node, Parser};
+use crate::expressions::types::CellReferenceRC;
+
+#[test]
+fn simple_horizontal() {
+    let worksheets = vec!["Sheet1".to_string()];
+    let mut parser = Parser::new(worksheets, vec![], HashMap::new());
+
+    // Reference cell is Sheet1!A1
+    let cell_reference = CellReferenceRC {
+        sheet: "Sheet1".to_string(),
+        row: 1,
+        column: 1,
+    };
+    let horizontal = parser.parse("{1, 2, 3}", &cell_reference);
+    assert_eq!(
+        horizontal,
+        Node::ArrayKind(vec![vec![
+            ArrayNode::Number(1.0),
+            ArrayNode::Number(2.0),
+            ArrayNode::Number(3.0)
+        ]])
+    );
+
+    assert_eq!(to_rc_format(&horizontal), "{1,2,3}");
+    assert_eq!(to_string(&horizontal, &cell_reference), "{1,2,3}");
+}
+
+#[test]
+fn simple_vertical() {
+    let worksheets = vec!["Sheet1".to_string()];
+    let mut parser = Parser::new(worksheets, vec![], HashMap::new());
+
+    // Reference cell is Sheet1!A1
+    let cell_reference = CellReferenceRC {
+        sheet: "Sheet1".to_string(),
+        row: 1,
+        column: 1,
+    };
+    let vertical = parser.parse("{1;2; 3}", &cell_reference);
+    assert_eq!(
+        vertical,
+        Node::ArrayKind(vec![
+            vec![ArrayNode::Number(1.0)],
+            vec![ArrayNode::Number(2.0)],
+            vec![ArrayNode::Number(3.0)]
+        ])
+    );
+    assert_eq!(to_rc_format(&vertical), "{1;2;3}");
+    assert_eq!(to_string(&vertical, &cell_reference), "{1;2;3}");
+}
+
+#[test]
+fn simple_matrix() {
+    let worksheets = vec!["Sheet1".to_string()];
+    let mut parser = Parser::new(worksheets, vec![], HashMap::new());
+
+    // Reference cell is Sheet1!A1
+    let cell_reference = CellReferenceRC {
+        sheet: "Sheet1".to_string(),
+        row: 1,
+        column: 1,
+    };
+    let matrix = parser.parse("{1,2,3; 4, 5, 6; 7,8,9}", &cell_reference);
+    assert_eq!(
+        matrix,
+        Node::ArrayKind(vec![
+            vec![
+                ArrayNode::Number(1.0),
+                ArrayNode::Number(2.0),
+                ArrayNode::Number(3.0)
+            ],
+            vec![
+                ArrayNode::Number(4.0),
+                ArrayNode::Number(5.0),
+                ArrayNode::Number(6.0)
+            ],
+            vec![
+                ArrayNode::Number(7.0),
+                ArrayNode::Number(8.0),
+                ArrayNode::Number(9.0)
+            ]
+        ])
+    );
+    assert_eq!(to_rc_format(&matrix), "{1,2,3;4,5,6;7,8,9}");
+    assert_eq!(to_string(&matrix, &cell_reference), "{1,2,3;4,5,6;7,8,9}");
+}

base/src/expressions/parser/tests/test_implicit_intersection.rs

@@ -0,0 +1,75 @@
+#![allow(clippy::panic)]
+
+use crate::expressions::parser::{Node, Parser};
+use crate::expressions::types::CellReferenceRC;
+use std::collections::HashMap;
+
+#[test]
+fn simple() {
+    let worksheets = vec!["Sheet1".to_string()];
+    let mut parser = Parser::new(worksheets, vec![], HashMap::new());
+
+    // Reference cell is Sheet1!B3
+    let cell_reference = CellReferenceRC {
+        sheet: "Sheet1".to_string(),
+        row: 3,
+        column: 2,
+    };
+    let t = parser.parse("@A1:A10", &cell_reference);
+    let child = Node::RangeKind {
+        sheet_name: None,
+        sheet_index: 0,
+        absolute_row1: false,
+        absolute_column1: false,
+        row1: -2,
+        column1: -1,
+        absolute_row2: false,
+        absolute_column2: false,
+        row2: 7,
+        column2: -1,
+    };
+    assert_eq!(
+        t,
+        Node::ImplicitIntersection {
+            automatic: false,
+            child: Box::new(child)
+        }
+    )
+}
+
+#[test]
+fn simple_add() {
+    let worksheets = vec!["Sheet1".to_string()];
+    let mut parser = Parser::new(worksheets, vec![], HashMap::new());
+
+    // Reference cell is Sheet1!B3
+    let cell_reference = CellReferenceRC {
+        sheet: "Sheet1".to_string(),
+        row: 3,
+        column: 2,
+    };
+    let t = parser.parse("@A1:A10+12", &cell_reference);
+    let child = Node::RangeKind {
+        sheet_name: None,
+        sheet_index: 0,
+        absolute_row1: false,
+        absolute_column1: false,
+        row1: -2,
+        column1: -1,
+        absolute_row2: false,
+        absolute_column2: false,
+        row2: 7,
+        column2: -1,
+    };
+    assert_eq!(
+        t,
+        Node::OpSumKind {
+            kind: crate::expressions::token::OpSum::Add,
+            left: Box::new(Node::ImplicitIntersection {
+                automatic: false,
+                child: Box::new(child)
+            }),
+            right: Box::new(Node::NumberKind(12.0))
+        }
+    )
+}

base/src/expressions/parser/tests/test_move_formula.rs

@@ -387,7 +387,7 @@ fn test_move_formula_misc() {
         width: 4,
         height: 5,
     };
-    let node = parser.parse("X9^C2-F4*H2", context);
+    let node = parser.parse("X9^C2-F4*H2+SUM(F2:H4)+SUM(C2:F6)", context);
     let t = move_formula(
         &node,
         &MoveContext {
@@ -400,7 +400,7 @@ fn test_move_formula_misc() {
             column_delta: 10,
         },
     );
-    assert_eq!(t, "X9^M12-P14*H2");
+    assert_eq!(t, "X9^M12-P14*H2+SUM(F2:H4)+SUM(M12:P16)");
 
     let node = parser.parse("F5*(-D5)*SUM(A1, X9, $D$5)", context);
     let t = move_formula(
@@ -475,3 +475,77 @@ fn test_move_formula_another_sheet() {
         "Sheet1!AB31*SUM(Sheet1!JJ3:JJ4)+SUM(Sheet2!C2:F6)*SUM(M12:P16)"
     );
 }
+
+#[test]
+fn move_formula_implicit_intersetion() {
+    // context is E4
+    let row = 4;
+    let column = 5;
+    let context = &CellReferenceRC {
+        sheet: "Sheet1".to_string(),
+        row,
+        column,
+    };
+    let worksheets = vec!["Sheet1".to_string()];
+    let mut parser = Parser::new(worksheets, vec![], HashMap::new());
+
+    // Area is C2:F6
+    let area = &Area {
+        sheet: 0,
+        row: 2,
+        column: 3,
+        width: 4,
+        height: 5,
+    };
+    let node = parser.parse("SUM(@F2:H4)+SUM(@C2:F6)", context);
+    let t = move_formula(
+        &node,
+        &MoveContext {
+            source_sheet_name: "Sheet1",
+            row,
+            column,
+            area,
+            target_sheet_name: "Sheet1",
+            row_delta: 10,
+            column_delta: 10,
+        },
+    );
+    assert_eq!(t, "SUM(@F2:H4)+SUM(@M12:P16)");
+}
+
+#[test]
+fn move_formula_implicit_intersetion_with_ranges() {
+    // context is E4
+    let row = 4;
+    let column = 5;
+    let context = &CellReferenceRC {
+        sheet: "Sheet1".to_string(),
+        row,
+        column,
+    };
+    let worksheets = vec!["Sheet1".to_string()];
+    let mut parser = Parser::new(worksheets, vec![], HashMap::new());
+
+    // Area is C2:F6
+    let area = &Area {
+        sheet: 0,
+        row: 2,
+        column: 3,
+        width: 4,
+        height: 5,
+    };
+    let node = parser.parse("SUM(@F2:H4)+SUM(@C2:F6)+SUM(@A1, @X9, @$D$5)", context);
+    let t = move_formula(
+        &node,
+        &MoveContext {
+            source_sheet_name: "Sheet1",
+            row,
+            column,
+            area,
+            target_sheet_name: "Sheet1",
+            row_delta: 10,
+            column_delta: 10,
+        },
+    );
+    assert_eq!(t, "SUM(@F2:H4)+SUM(@M12:P16)+SUM(@A1,@X9,@$N$15)");
+}

base/src/expressions/parser/tests/test_tables.rs

@@ -3,11 +3,10 @@
 use std::collections::HashMap;
 
 use crate::expressions::parser::stringify::to_string;
-use crate::expressions::utils::{number_to_column, parse_reference_a1};
-use crate::types::{Table, TableColumn, TableStyleInfo};
-
 use crate::expressions::parser::Parser;
 use crate::expressions::types::CellReferenceRC;
+use crate::expressions::utils::{number_to_column, parse_reference_a1};
+use crate::types::{Table, TableColumn, TableStyleInfo};
 
 fn create_test_table(
     table_name: &str,

base/src/expressions/parser/walk.rs

@@ -1,278 +0,0 @@
-use super::{move_formula::ref_is_in_area, Node};
-
-use crate::expressions::types::{Area, CellReferenceIndex};
-
-pub(crate) fn forward_references(
-    node: &mut Node,
-    context: &CellReferenceIndex,
-    source_area: &Area,
-    target_sheet: u32,
-    target_sheet_name: &str,
-    target_row: i32,
-    target_column: i32,
-) {
-    match node {
-        Node::ReferenceKind {
-            sheet_name,
-            sheet_index: reference_sheet,
-            absolute_row,
-            absolute_column,
-            row: reference_row,
-            column: reference_column,
-        } => {
-            let reference_row_absolute = if *absolute_row {
-                *reference_row
-            } else {
-                *reference_row + context.row
-            };
-            let reference_column_absolute = if *absolute_column {
-                *reference_column
-            } else {
-                *reference_column + context.column
-            };
-            if ref_is_in_area(
-                *reference_sheet,
-                reference_row_absolute,
-                reference_column_absolute,
-                source_area,
-            ) {
-                if *reference_sheet != target_sheet {
-                    *sheet_name = Some(target_sheet_name.to_string());
-                    *reference_sheet = target_sheet;
-                }
-                *reference_row = target_row + *reference_row - source_area.row;
-                *reference_column = target_column + *reference_column - source_area.column;
-            }
-        }
-        Node::RangeKind {
-            sheet_name,
-            sheet_index,
-            absolute_row1,
-            absolute_column1,
-            row1,
-            column1,
-            absolute_row2,
-            absolute_column2,
-            row2,
-            column2,
-        } => {
-            let reference_row1 = if *absolute_row1 {
-                *row1
-            } else {
-                *row1 + context.row
-            };
-            let reference_column1 = if *absolute_column1 {
-                *column1
-            } else {
-                *column1 + context.column
-            };
-
-            let reference_row2 = if *absolute_row2 {
-                *row2
-            } else {
-                *row2 + context.row
-            };
-            let reference_column2 = if *absolute_column2 {
-                *column2
-            } else {
-                *column2 + context.column
-            };
-            if ref_is_in_area(*sheet_index, reference_row1, reference_column1, source_area)
-                && ref_is_in_area(*sheet_index, reference_row2, reference_column2, source_area)
-            {
-                if *sheet_index != target_sheet {
-                    *sheet_index = target_sheet;
-                    *sheet_name = Some(target_sheet_name.to_string());
-                }
-                *row1 = target_row + *row1 - source_area.row;
-                *column1 = target_column + *column1 - source_area.column;
-                *row2 = target_row + *row2 - source_area.row;
-                *column2 = target_column + *column2 - source_area.column;
-            }
-        }
-        // Recurse
-        Node::OpRangeKind { left, right } => {
-            forward_references(
-                left,
-                context,
-                source_area,
-                target_sheet,
-                target_sheet_name,
-                target_row,
-                target_column,
-            );
-            forward_references(
-                right,
-                context,
-                source_area,
-                target_sheet,
-                target_sheet_name,
-                target_row,
-                target_column,
-            );
-        }
-        Node::OpConcatenateKind { left, right } => {
-            forward_references(
-                left,
-                context,
-                source_area,
-                target_sheet,
-                target_sheet_name,
-                target_row,
-                target_column,
-            );
-            forward_references(
-                right,
-                context,
-                source_area,
-                target_sheet,
-                target_sheet_name,
-                target_row,
-                target_column,
-            );
-        }
-        Node::OpSumKind {
-            kind: _,
-            left,
-            right,
-        } => {
-            forward_references(
-                left,
-                context,
-                source_area,
-                target_sheet,
-                target_sheet_name,
-                target_row,
-                target_column,
-            );
-            forward_references(
-                right,
-                context,
-                source_area,
-                target_sheet,
-                target_sheet_name,
-                target_row,
-                target_column,
-            );
-        }
-        Node::OpProductKind {
-            kind: _,
-            left,
-            right,
-        } => {
-            forward_references(
-                left,
-                context,
-                source_area,
-                target_sheet,
-                target_sheet_name,
-                target_row,
-                target_column,
-            );
-            forward_references(
-                right,
-                context,
-                source_area,
-                target_sheet,
-                target_sheet_name,
-                target_row,
-                target_column,
-            );
-        }
-        Node::OpPowerKind { left, right } => {
-            forward_references(
-                left,
-                context,
-                source_area,
-                target_sheet,
-                target_sheet_name,
-                target_row,
-                target_column,
-            );
-            forward_references(
-                right,
-                context,
-                source_area,
-                target_sheet,
-                target_sheet_name,
-                target_row,
-                target_column,
-            );
-        }
-        Node::FunctionKind { kind: _, args } => {
-            for arg in args {
-                forward_references(
-                    arg,
-                    context,
-                    source_area,
-                    target_sheet,
-                    target_sheet_name,
-                    target_row,
-                    target_column,
-                );
-            }
-        }
-        Node::InvalidFunctionKind { name: _, args } => {
-            for arg in args {
-                forward_references(
-                    arg,
-                    context,
-                    source_area,
-                    target_sheet,
-                    target_sheet_name,
-                    target_row,
-                    target_column,
-                );
-            }
-        }
-        Node::CompareKind {
-            kind: _,
-            left,
-            right,
-        } => {
-            forward_references(
-                left,
-                context,
-                source_area,
-                target_sheet,
-                target_sheet_name,
-                target_row,
-                target_column,
-            );
-            forward_references(
-                right,
-                context,
-                source_area,
-                target_sheet,
-                target_sheet_name,
-                target_row,
-                target_column,
-            );
-        }
-        Node::UnaryKind { kind: _, right } => {
-            forward_references(
-                right,
-                context,
-                source_area,
-                target_sheet,
-                target_sheet_name,
-                target_row,
-                target_column,
-            );
-        }
-        // TODO: Not implemented
-        Node::ArrayKind(_) => {}
-        // Do nothing. Note: we could do a blanket _ => {}
-        Node::DefinedNameKind(_) => {}
-        Node::TableNameKind(_) => {}
-        Node::WrongVariableKind(_) => {}
-        Node::ErrorKind(_) => {}
-        Node::ParseErrorKind { .. } => {}
-        Node::EmptyArgKind => {}
-        Node::BooleanKind(_) => {}
-        Node::NumberKind(_) => {}
-        Node::StringKind(_) => {}
-        Node::WrongReferenceKind { .. } => {}
-        Node::WrongRangeKind { .. } => {}
-    }
-}

base/src/expressions/token.rs

@@ -197,7 +197,7 @@ pub fn is_english_error_string(name: &str) -> bool {
         "#REF!", "#NAME?", "#VALUE!", "#DIV/0!", "#N/A", "#NUM!", "#ERROR!", "#N/IMPL!", "#SPILL!",
         "#CALC!", "#CIRC!", "#NULL!",
     ];
-    names.iter().any(|e| *e == name)
+    names.contains(&name)
 }
 
 #[derive(Debug, PartialEq, Clone, Serialize, Deserialize)]
@@ -240,6 +240,7 @@ pub enum TokenType {
     Bang,               // !
     Percent,            // %
     And,                // &
+    At,                 // @
     Reference {
         sheet: Option<String>,
         row: i32,

base/src/formatter/dates.rs

@@ -21,14 +21,12 @@ fn is_date_within_range(date: NaiveDate) -> bool {
 pub fn from_excel_date(days: i64) -> Result<NaiveDate, String> {
     if days < MINIMUM_DATE_SERIAL_NUMBER as i64 {
         return Err(format!(
-            "Excel date must be greater than {}",
+            "Excel date must be greater than {MINIMUM_DATE_SERIAL_NUMBER}"
-            MINIMUM_DATE_SERIAL_NUMBER
         ));
     };
     if days > MAXIMUM_DATE_SERIAL_NUMBER as i64 {
         return Err(format!(
-            "Excel date must be less than {}",
+            "Excel date must be less than {MAXIMUM_DATE_SERIAL_NUMBER}"
-            MAXIMUM_DATE_SERIAL_NUMBER
         ));
     };
     #[allow(clippy::expect_used)]

base/src/formatter/format.rs

@@ -120,7 +120,7 @@ pub fn format_number(value_original: f64, format: &str, locale: &Locale) -> Form
             // We should have different codepaths for general formatting and errors
             let value_abs = value.abs();
             if (1.0e-8..1.0e+11).contains(&value_abs) {
-                let mut text = format!("{:.9}", value);
+                let mut text = format!("{value:.9}");
                 text = text.trim_end_matches('0').trim_end_matches('.').to_string();
                 Formatted {
                     text,
@@ -138,7 +138,7 @@ pub fn format_number(value_original: f64, format: &str, locale: &Locale) -> Form
                 let exponent = value_abs.log10().floor();
                 value /= 10.0_f64.powf(exponent);
                 let sign = if exponent < 0.0 { '-' } else { '+' };
-                let s = format!("{:.5}", value);
+                let s = format!("{value:.5}");
                 Formatted {
                     text: format!(
                         "{}E{}{:02}",
@@ -167,33 +167,33 @@ pub fn format_number(value_original: f64, format: &str, locale: &Locale) -> Form
             for token in tokens {
                 match token {
                     TextToken::Literal(c) => {
-                        text = format!("{}{}", text, c);
+                        text = format!("{text}{c}");
                     }
                     TextToken::Text(t) => {
-                        text = format!("{}{}", text, t);
+                        text = format!("{text}{t}");
                     }
                     TextToken::Ghost(_) => {
                         // we just leave a whitespace
                         // This is what the TEXT function does
-                        text = format!("{} ", text);
+                        text = format!("{text} ");
                     }
                     TextToken::Spacer(_) => {
                         // we just leave a whitespace
                         // This is what the TEXT function does
-                        text = format!("{} ", text);
+                        text = format!("{text} ");
                     }
                     TextToken::Raw => {
-                        text = format!("{}{}", text, value);
+                        text = format!("{text}{value}");
                     }
                     TextToken::Digit(_) => {}
                     TextToken::Period => {}
                     TextToken::Day => {
                         let day = date.day() as usize;
-                        text = format!("{}{}", text, day);
+                        text = format!("{text}{day}");
                     }
                     TextToken::DayPadded => {
                         let day = date.day() as usize;
-                        text = format!("{}{:02}", text, day);
+                        text = format!("{text}{day:02}");
                     }
                     TextToken::DayNameShort => {
                         let mut day = date.weekday().number_from_monday() as usize;
@@ -211,11 +211,11 @@ pub fn format_number(value_original: f64, format: &str, locale: &Locale) -> Form
                     }
                     TextToken::Month => {
                         let month = date.month() as usize;
-                        text = format!("{}{}", text, month);
+                        text = format!("{text}{month}");
                     }
                     TextToken::MonthPadded => {
                         let month = date.month() as usize;
-                        text = format!("{}{:02}", text, month);
+                        text = format!("{text}{month:02}");
                     }
                     TextToken::MonthNameShort => {
                         let month = date.month() as usize;
@@ -228,7 +228,7 @@ pub fn format_number(value_original: f64, format: &str, locale: &Locale) -> Form
                     TextToken::MonthLetter => {
                         let month = date.month() as usize;
                         let months_letter = &locale.dates.months_letter[month - 1];
-                        text = format!("{}{}", text, months_letter);
+                        text = format!("{text}{months_letter}");
                     }
                     TextToken::YearShort => {
                         text = format!("{}{}", text, date.format("%y"));
@@ -247,7 +247,7 @@ pub fn format_number(value_original: f64, format: &str, locale: &Locale) -> Form
         ParsePart::Number(p) => {
             let mut text = "".to_string();
             if let Some(c) = p.currency {
-                text = format!("{}", c);
+                text = format!("{c}");
             }
             let tokens = &p.tokens;
             value = value * 100.0_f64.powi(p.percent) / (1000.0_f64.powi(p.comma));
@@ -295,26 +295,26 @@ pub fn format_number(value_original: f64, format: &str, locale: &Locale) -> Form
             for token in tokens {
                 match token {
                     TextToken::Literal(c) => {
-                        text = format!("{}{}", text, c);
+                        text = format!("{text}{c}");
                     }
                     TextToken::Text(t) => {
-                        text = format!("{}{}", text, t);
+                        text = format!("{text}{t}");
                     }
                     TextToken::Ghost(_) => {
                         // we just leave a whitespace
                         // This is what the TEXT function does
-                        text = format!("{} ", text);
+                        text = format!("{text} ");
                     }
                     TextToken::Spacer(_) => {
                         // we just leave a whitespace
                         // This is what the TEXT function does
-                        text = format!("{} ", text);
+                        text = format!("{text} ");
                     }
                     TextToken::Raw => {
-                        text = format!("{}{}", text, value);
+                        text = format!("{text}{value}");
                     }
                     TextToken::Period => {
-                        text = format!("{}{}", text, decimal_separator);
+                        text = format!("{text}{decimal_separator}");
                     }
                     TextToken::Digit(digit) => {
                         if digit.number == 'i' {
@@ -322,7 +322,7 @@ pub fn format_number(value_original: f64, format: &str, locale: &Locale) -> Form
                             let index = digit.index;
                             let number_index = ln - digit_count + index;
                             if index == 0 && is_negative {
-                                text = format!("-{}", text);
+                                text = format!("-{text}");
                             }
                             if ln <= digit_count {
                                 // The number of digits is less or equal than the number of digit tokens
@@ -347,7 +347,7 @@ pub fn format_number(value_original: f64, format: &str, locale: &Locale) -> Form
                                     } else {
                                         ""
                                     };
-                                    text = format!("{}{}{}", text, c, sep);
+                                    text = format!("{text}{c}{sep}");
                                 }
                                 digit_index += 1;
                             } else {
@@ -373,18 +373,18 @@ pub fn format_number(value_original: f64, format: &str, locale: &Locale) -> Form
                             if index < fract_part.len() {
                                 text = format!("{}{}", text, fract_part[index]);
                             } else if digit.kind == '0' {
-                                text = format!("{}0", text);
+                                text = format!("{text}0");
                             } else if digit.kind == '?' {
-                                text = format!("{} ", text);
+                                text = format!("{text} ");
                             }
                         } else if digit.number == 'e' {
                             // 3. Exponent part
                             let index = digit.index;
                             if index == 0 {
                                 if exponent_is_negative {
-                                    text = format!("{}E-", text);
+                                    text = format!("{text}E-");
                                 } else {
-                                    text = format!("{}E+", text);
+                                    text = format!("{text}E+");
                                 }
                             }
                             let number_index = l_exp - (p.exponent_digit_count - index);
@@ -400,7 +400,7 @@ pub fn format_number(value_original: f64, format: &str, locale: &Locale) -> Form
                                         exponent_part[number_index as usize]
                                     };
 
-                                    text = format!("{}{}", text, c);
+                                    text = format!("{text}{c}");
                                 }
                             } else {
                                 for i in 0..number_index + 1 {
@@ -614,7 +614,7 @@ pub(crate) fn parse_formatted_number(
 
     // check if it is a currency in currencies
     for currency in currencies {
-        if let Some(p) = value.strip_prefix(&format!("-{}", currency)) {
+        if let Some(p) = value.strip_prefix(&format!("-{currency}")) {
             let (f, options) = parse_number(p.trim())?;
             if options.is_scientific {
                 return Ok((f, Some(scientific_format.to_string())));

base/src/formatter/lexer.rs

@@ -178,10 +178,7 @@ impl Lexer {
             }
         }
         self.position = position;
-        match chars.parse::<f64>() {
+        chars.parse::<f64>().ok()
-            Err(_) => None,
-            Ok(v) => Some(v),
-        }
     }
 
     fn consume_condition(&mut self) -> Option<(Compare, f64)> {
@@ -336,7 +333,7 @@ impl Lexer {
                         } else if s == '-' {
                             Token::ScientificMinus
                         } else {
-                            self.set_error(&format!("Unexpected char: {}. Expected + or -", s));
+                            self.set_error(&format!("Unexpected char: {s}. Expected + or -"));
                             Token::ILLEGAL
                         }
                     } else {
@@ -388,14 +385,14 @@ impl Lexer {
                     for c in "eneral".chars() {
                         let cc = self.read_next_char();
                         if Some(c) != cc {
-                            self.set_error(&format!("Unexpected character: {}", x));
+                            self.set_error(&format!("Unexpected character: {x}"));
                             return Token::ILLEGAL;
                         }
                     }
                     Token::General
                 }
                 _ => {
-                    self.set_error(&format!("Unexpected character: {}", x));
+                    self.set_error(&format!("Unexpected character: {x}"));
                     Token::ILLEGAL
                 }
             },

base/src/functions/engineering/complex.rs

@@ -46,18 +46,18 @@ impl fmt::Display for Complex {
         // it is a bit weird what Excel does but it seems it uses general notation for
         // numbers > 1e-20 and scientific notation for the rest
         let y_str = if y.abs() <= 9e-20 {
-            format!("{:E}", y)
+            format!("{y:E}")
         } else if y == 1.0 {
             "".to_string()
         } else if y == -1.0 {
             "-".to_string()
         } else {
-            format!("{}", y)
+            format!("{y}")
         };
         let x_str = if x.abs() <= 9e-20 {
-            format!("{:E}", x)
+            format!("{x:E}")
         } else {
-            format!("{}", x)
+            format!("{x}")
         };
         if y == 0.0 && x == 0.0 {
             write!(f, "0")

base/src/functions/engineering/number_basis.rs

@@ -76,7 +76,7 @@ impl Model {
         if value < 0 {
             CalcResult::String(format!("{:0width$X}", HEX_MAX + value, width = 9))
         } else {
-            let result = format!("{:X}", value);
+            let result = format!("{value:X}");
             if let Some(places) = places {
                 if places < result.len() as i32 {
                     return CalcResult::new_error(
@@ -120,7 +120,7 @@ impl Model {
         if value < 0 {
             CalcResult::String(format!("{:0width$o}", OCT_MAX + value, width = 9))
         } else {
-            let result = format!("{:o}", value);
+            let result = format!("{value:o}");
             if let Some(places) = places {
                 if places < result.len() as i32 {
                     return CalcResult::new_error(
@@ -163,7 +163,7 @@ impl Model {
         if value < 0 {
             value += 1024;
         }
-        let result = format!("{:b}", value);
+        let result = format!("{value:b}");
         if let Some(places) = places {
             if value_raw > 0.0 && places < result.len() as i32 {
                 return CalcResult::new_error(Error::NUM, cell, "Out of bounds".to_string());
@@ -202,7 +202,7 @@ impl Model {
         if value < 0 {
             value += HEX_MAX;
         }
-        let result = format!("{:X}", value);
+        let result = format!("{value:X}");
         if let Some(places) = places {
             if value_raw > 0.0 && places < result.len() as i32 {
                 return CalcResult::new_error(Error::NUM, cell, "Out of bounds".to_string());
@@ -242,7 +242,7 @@ impl Model {
         if value < 0 {
             value += OCT_MAX;
         }
-        let result = format!("{:o}", value);
+        let result = format!("{value:o}");
         if let Some(places) = places {
             if value_raw > 0.0 && places < result.len() as i32 {
                 return CalcResult::new_error(Error::NUM, cell, "Out of bounds".to_string());
@@ -301,7 +301,7 @@ impl Model {
         if value < 0 {
             value += 1024;
         }
-        let result = format!("{:b}", value);
+        let result = format!("{value:b}");
         if let Some(places) = places {
             if places <= 0 || (value > 0 && places < result.len() as i32) {
                 return CalcResult::new_error(Error::NUM, cell, "Out of bounds".to_string());
@@ -391,7 +391,7 @@ impl Model {
         if value < 0 {
             value += OCT_MAX;
         }
-        let result = format!("{:o}", value);
+        let result = format!("{value:o}");
         if let Some(places) = places {
             if places <= 0 || (value > 0 && places < result.len() as i32) {
                 return CalcResult::new_error(Error::NUM, cell, "Out of bounds".to_string());
@@ -446,7 +446,7 @@ impl Model {
         if value < 0 {
             value += 1024;
         }
-        let result = format!("{:b}", value);
+        let result = format!("{value:b}");
         if let Some(places) = places {
             if value < 512 && places < result.len() as i32 {
                 return CalcResult::new_error(Error::NUM, cell, "Out of bounds".to_string());
@@ -532,7 +532,7 @@ impl Model {
         if value < 0 {
             value += HEX_MAX;
         }
-        let result = format!("{:X}", value);
+        let result = format!("{value:X}");
         if let Some(places) = places {
             if value < HEX_MAX_HALF && places < result.len() as i32 {
                 return CalcResult::new_error(Error::NUM, cell, "Out of bounds".to_string());

base/src/functions/financial.rs

@@ -231,7 +231,7 @@ impl Model {
                             CalcResult::new_error(
                                 Error::ERROR,
                                 *cell,
-                                format!("Invalid worksheet index: '{}'", sheet),
+                                format!("Invalid worksheet index: '{sheet}'"),
                             )
                         })?
                         .dimension()
@@ -245,7 +245,7 @@ impl Model {
                             CalcResult::new_error(
                                 Error::ERROR,
                                 *cell,
-                                format!("Invalid worksheet index: '{}'", sheet),
+                                format!("Invalid worksheet index: '{sheet}'"),
                             )
                         })?
                         .dimension()

base/src/functions/information.rs

@@ -235,6 +235,11 @@ impl Model {
                 // This cannot happen
                 CalcResult::Number(1.0)
             }
+            CalcResult::Array(_) => CalcResult::Error {
+                error: Error::NIMPL,
+                origin: cell,
+                message: "Arrays not supported yet".to_string(),
+            },
         }
     }
     pub(crate) fn fn_sheet(&mut self, args: &[Node], cell: CellReferenceIndex) -> CalcResult {
@@ -249,7 +254,7 @@ impl Model {
         // The arg could be a defined name or a table
         // let  = &args[0];
         match &args[0] {
-            Node::DefinedNameKind((name, scope)) => {
+            Node::DefinedNameKind((name, scope, _)) => {
                 // Let's see if it is a defined name
                 if let Some(defined_name) = self
                     .parsed_defined_names

base/src/functions/logical.rs

@@ -161,6 +161,13 @@ impl Model {
                                 CalcResult::Range { .. }
                                 | CalcResult::String { .. }
                                 | CalcResult::EmptyCell => {}
+                                CalcResult::Array(_) => {
+                                    return CalcResult::Error {
+                                        error: Error::NIMPL,
+                                        origin: cell,
+                                        message: "Arrays not supported yet".to_string(),
+                                    }
+                                }
                             }
                             if let (Some(current_result), Some(short_circuit_value)) =
                                 (result, short_circuit_value)
@@ -185,6 +192,13 @@ impl Model {
                 }
                 // References to empty cells are ignored. If all args are ignored the result is #VALUE!
                 CalcResult::EmptyCell => {}
+                CalcResult::Array(_) => {
+                    return CalcResult::Error {
+                        error: Error::NIMPL,
+                        origin: cell,
+                        message: "Arrays not supported yet".to_string(),
+                    }
+                }
             }
 
             if let (Some(current_result), Some(short_circuit_value)) = (result, short_circuit_value)

base/src/functions/lookup_and_reference.rs

@@ -855,7 +855,7 @@ impl Model {
             if left.row != right.row || left.column != right.column {
                 // FIXME: Implicit intersection or dynamic arrays
                 return CalcResult::Error {
-                    error: Error::ERROR,
+                    error: Error::NIMPL,
                     origin: cell,
                     message: "argument must be a reference to a single cell".to_string(),
                 };

base/src/functions/macros.rs

@@ -0,0 +1,100 @@
+#[macro_export]
+macro_rules! single_number_fn {
+    // The macro takes:
+    //   1) A function name to define (e.g. fn_sin)
+    //   2) The operation to apply (e.g. f64::sin)
+    ($fn_name:ident, $op:expr) => {
+        pub(crate) fn $fn_name(&mut self, args: &[Node], cell: CellReferenceIndex) -> CalcResult {
+            // 1) Check exactly one argument
+            if args.len() != 1 {
+                return CalcResult::new_args_number_error(cell);
+            }
+            // 2) Try to get a "NumberOrArray"
+            match self.get_number_or_array(&args[0], cell) {
+                // -----------------------------------------
+                // Case A: It's a single number
+                // -----------------------------------------
+                Ok(NumberOrArray::Number(f)) => match $op(f) {
+                    Ok(x) => CalcResult::Number(x),
+                    Err(Error::DIV) => CalcResult::Error {
+                        error: Error::DIV,
+                        origin: cell,
+                        message: "Divide by 0".to_string(),
+                    },
+                    Err(Error::VALUE) => CalcResult::Error {
+                        error: Error::VALUE,
+                        origin: cell,
+                        message: "Invalid number".to_string(),
+                    },
+                    Err(e) => CalcResult::Error {
+                        error: e,
+                        origin: cell,
+                        message: "Unknown error".to_string(),
+                    },
+                },
+
+                // -----------------------------------------
+                // Case B: It's an array, so apply $op
+                // element-by-element.
+                // -----------------------------------------
+                Ok(NumberOrArray::Array(a)) => {
+                    let mut array = Vec::new();
+                    for row in a {
+                        let mut data_row = Vec::with_capacity(row.len());
+                        for value in row {
+                            match value {
+                                // If Boolean, treat as 0.0 or 1.0
+                                ArrayNode::Boolean(b) => {
+                                    let n = if b { 1.0 } else { 0.0 };
+                                    match $op(n) {
+                                        Ok(x) => data_row.push(ArrayNode::Number(x)),
+                                        Err(Error::DIV) => {
+                                            data_row.push(ArrayNode::Error(Error::DIV))
+                                        }
+                                        Err(Error::VALUE) => {
+                                            data_row.push(ArrayNode::Error(Error::VALUE))
+                                        }
+                                        Err(e) => data_row.push(ArrayNode::Error(e)),
+                                    }
+                                }
+                                // If Number, apply directly
+                                ArrayNode::Number(n) => match $op(n) {
+                                    Ok(x) => data_row.push(ArrayNode::Number(x)),
+                                    Err(Error::DIV) => data_row.push(ArrayNode::Error(Error::DIV)),
+                                    Err(Error::VALUE) => {
+                                        data_row.push(ArrayNode::Error(Error::VALUE))
+                                    }
+                                    Err(e) => data_row.push(ArrayNode::Error(e)),
+                                },
+                                // If String, parse to f64 then apply or #VALUE! error
+                                ArrayNode::String(s) => {
+                                    let node = match s.parse::<f64>() {
+                                        Ok(f) => match $op(f) {
+                                            Ok(x) => ArrayNode::Number(x),
+                                            Err(Error::DIV) => ArrayNode::Error(Error::DIV),
+                                            Err(Error::VALUE) => ArrayNode::Error(Error::VALUE),
+                                            Err(e) => ArrayNode::Error(e),
+                                        },
+                                        Err(_) => ArrayNode::Error(Error::VALUE),
+                                    };
+                                    data_row.push(node);
+                                }
+                                // If Error, propagate the error
+                                e @ ArrayNode::Error(_) => {
+                                    data_row.push(e);
+                                }
+                            }
+                        }
+                        array.push(data_row);
+                    }
+                    CalcResult::Array(array)
+                }
+
+                // -----------------------------------------
+                // Case C: It's an Error => just return it
+                // -----------------------------------------
+                Err(err_result) => err_result,
+            }
+        }
+    };
+}

base/src/functions/mathematical.rs

@@ -1,5 +1,8 @@
+use crate::cast::NumberOrArray;
 use crate::constants::{LAST_COLUMN, LAST_ROW};
+use crate::expressions::parser::ArrayNode;
 use crate::expressions::types::CellReferenceIndex;
+use crate::single_number_fn;
 use crate::{
     calc_result::CalcResult, expressions::parser::Node, expressions::token::Error, model::Model,
 };
@@ -169,6 +172,27 @@ impl Model {
                         }
                     }
                 }
+                CalcResult::Array(array) => {
+                    for row in array {
+                        for value in row {
+                            match value {
+                                ArrayNode::Number(value) => {
+                                    result += value;
+                                }
+                                ArrayNode::Error(error) => {
+                                    return CalcResult::Error {
+                                        error,
+                                        origin: cell,
+                                        message: "Error in array".to_string(),
+                                    }
+                                }
+                                _ => {
+                                    // We ignore booleans and strings
+                                }
+                            }
+                        }
+                    }
+                }
                 error @ CalcResult::Error { .. } => return error,
                 _ => {
                     // We ignore booleans and strings
@@ -354,187 +378,29 @@ impl Model {
         }
     }
 
-    pub(crate) fn fn_sin(&mut self, args: &[Node], cell: CellReferenceIndex) -> CalcResult {
+    single_number_fn!(fn_sin, |f| Ok(f64::sin(f)));
-        if args.len() != 1 {
+    single_number_fn!(fn_cos, |f| Ok(f64::cos(f)));
-            return CalcResult::new_args_number_error(cell);
+    single_number_fn!(fn_tan, |f| Ok(f64::tan(f)));
-        }
+    single_number_fn!(fn_sinh, |f| Ok(f64::sinh(f)));
-        let value = match self.get_number(&args[0], cell) {
+    single_number_fn!(fn_cosh, |f| Ok(f64::cosh(f)));
-            Ok(f) => f,
+    single_number_fn!(fn_tanh, |f| Ok(f64::tanh(f)));
-            Err(s) => return s,
+    single_number_fn!(fn_asin, |f| Ok(f64::asin(f)));
-        };
+    single_number_fn!(fn_acos, |f| Ok(f64::acos(f)));
-        let result = value.sin();
+    single_number_fn!(fn_atan, |f| Ok(f64::atan(f)));
-        CalcResult::Number(result)
+    single_number_fn!(fn_asinh, |f| Ok(f64::asinh(f)));
-    }
+    single_number_fn!(fn_acosh, |f| Ok(f64::acosh(f)));
-    pub(crate) fn fn_cos(&mut self, args: &[Node], cell: CellReferenceIndex) -> CalcResult {
+    single_number_fn!(fn_atanh, |f| Ok(f64::atanh(f)));
-        if args.len() != 1 {
+    single_number_fn!(fn_abs, |f| Ok(f64::abs(f)));
-            return CalcResult::new_args_number_error(cell);
+    single_number_fn!(fn_sqrt, |f| if f < 0.0 {
-        }
+        Err(Error::NUM)
-        let value = match self.get_number(&args[0], cell) {
+    } else {
-            Ok(f) => f,
+        Ok(f64::sqrt(f))
-            Err(s) => return s,
+    });
-        };
+    single_number_fn!(fn_sqrtpi, |f: f64| if f < 0.0 {
-        let result = value.cos();
+        Err(Error::NUM)
-        CalcResult::Number(result)
+    } else {
-    }
+        Ok((f * PI).sqrt())
-
+    });
-    pub(crate) fn fn_tan(&mut self, args: &[Node], cell: CellReferenceIndex) -> CalcResult {
-        if args.len() != 1 {
-            return CalcResult::new_args_number_error(cell);
-        }
-        let value = match self.get_number(&args[0], cell) {
-            Ok(f) => f,
-            Err(s) => return s,
-        };
-        let result = value.tan();
-        CalcResult::Number(result)
-    }
-
-    pub(crate) fn fn_sinh(&mut self, args: &[Node], cell: CellReferenceIndex) -> CalcResult {
-        if args.len() != 1 {
-            return CalcResult::new_args_number_error(cell);
-        }
-        let value = match self.get_number(&args[0], cell) {
-            Ok(f) => f,
-            Err(s) => return s,
-        };
-        let result = value.sinh();
-        CalcResult::Number(result)
-    }
-    pub(crate) fn fn_cosh(&mut self, args: &[Node], cell: CellReferenceIndex) -> CalcResult {
-        if args.len() != 1 {
-            return CalcResult::new_args_number_error(cell);
-        }
-        let value = match self.get_number(&args[0], cell) {
-            Ok(f) => f,
-            Err(s) => return s,
-        };
-        let result = value.cosh();
-        CalcResult::Number(result)
-    }
-
-    pub(crate) fn fn_tanh(&mut self, args: &[Node], cell: CellReferenceIndex) -> CalcResult {
-        if args.len() != 1 {
-            return CalcResult::new_args_number_error(cell);
-        }
-        let value = match self.get_number(&args[0], cell) {
-            Ok(f) => f,
-            Err(s) => return s,
-        };
-        let result = value.tanh();
-        CalcResult::Number(result)
-    }
-
-    pub(crate) fn fn_asin(&mut self, args: &[Node], cell: CellReferenceIndex) -> CalcResult {
-        if args.len() != 1 {
-            return CalcResult::new_args_number_error(cell);
-        }
-        let value = match self.get_number(&args[0], cell) {
-            Ok(f) => f,
-            Err(s) => return s,
-        };
-        let result = value.asin();
-        if result.is_nan() || result.is_infinite() {
-            return CalcResult::Error {
-                error: Error::NUM,
-                origin: cell,
-                message: "Invalid argument for ASIN".to_string(),
-            };
-        }
-        CalcResult::Number(result)
-    }
-    pub(crate) fn fn_acos(&mut self, args: &[Node], cell: CellReferenceIndex) -> CalcResult {
-        if args.len() != 1 {
-            return CalcResult::new_args_number_error(cell);
-        }
-        let value = match self.get_number(&args[0], cell) {
-            Ok(f) => f,
-            Err(s) => return s,
-        };
-        let result = value.acos();
-        if result.is_nan() || result.is_infinite() {
-            return CalcResult::Error {
-                error: Error::NUM,
-                origin: cell,
-                message: "Invalid argument for COS".to_string(),
-            };
-        }
-        CalcResult::Number(result)
-    }
-
-    pub(crate) fn fn_atan(&mut self, args: &[Node], cell: CellReferenceIndex) -> CalcResult {
-        if args.len() != 1 {
-            return CalcResult::new_args_number_error(cell);
-        }
-        let value = match self.get_number(&args[0], cell) {
-            Ok(f) => f,
-            Err(s) => return s,
-        };
-        let result = value.atan();
-        if result.is_nan() || result.is_infinite() {
-            return CalcResult::Error {
-                error: Error::NUM,
-                origin: cell,
-                message: "Invalid argument for ATAN".to_string(),
-            };
-        }
-        CalcResult::Number(result)
-    }
-
-    pub(crate) fn fn_asinh(&mut self, args: &[Node], cell: CellReferenceIndex) -> CalcResult {
-        if args.len() != 1 {
-            return CalcResult::new_args_number_error(cell);
-        }
-        let value = match self.get_number(&args[0], cell) {
-            Ok(f) => f,
-            Err(s) => return s,
-        };
-        let result = value.asinh();
-        if result.is_nan() || result.is_infinite() {
-            return CalcResult::Error {
-                error: Error::NUM,
-                origin: cell,
-                message: "Invalid argument for ASINH".to_string(),
-            };
-        }
-        CalcResult::Number(result)
-    }
-    pub(crate) fn fn_acosh(&mut self, args: &[Node], cell: CellReferenceIndex) -> CalcResult {
-        if args.len() != 1 {
-            return CalcResult::new_args_number_error(cell);
-        }
-        let value = match self.get_number(&args[0], cell) {
-            Ok(f) => f,
-            Err(s) => return s,
-        };
-        let result = value.acosh();
-        if result.is_nan() || result.is_infinite() {
-            return CalcResult::Error {
-                error: Error::NUM,
-                origin: cell,
-                message: "Invalid argument for ACOSH".to_string(),
-            };
-        }
-        CalcResult::Number(result)
-    }
-
-    pub(crate) fn fn_atanh(&mut self, args: &[Node], cell: CellReferenceIndex) -> CalcResult {
-        if args.len() != 1 {
-            return CalcResult::new_args_number_error(cell);
-        }
-        let value = match self.get_number(&args[0], cell) {
-            Ok(f) => f,
-            Err(s) => return s,
-        };
-        let result = value.atanh();
-        if result.is_nan() || result.is_infinite() {
-            return CalcResult::Error {
-                error: Error::NUM,
-                origin: cell,
-                message: "Invalid argument for ATANH".to_string(),
-            };
-        }
-        CalcResult::Number(result)
-    }
 
     pub(crate) fn fn_pi(&mut self, args: &[Node], cell: CellReferenceIndex) -> CalcResult {
         if !args.is_empty() {
@@ -543,53 +409,6 @@ impl Model {
         CalcResult::Number(PI)
     }
 
-    pub(crate) fn fn_abs(&mut self, args: &[Node], cell: CellReferenceIndex) -> CalcResult {
-        if args.len() != 1 {
-            return CalcResult::new_args_number_error(cell);
-        }
-        let value = match self.get_number(&args[0], cell) {
-            Ok(f) => f,
-            Err(s) => return s,
-        };
-        CalcResult::Number(value.abs())
-    }
-
-    pub(crate) fn fn_sqrtpi(&mut self, args: &[Node], cell: CellReferenceIndex) -> CalcResult {
-        if args.len() != 1 {
-            return CalcResult::new_args_number_error(cell);
-        }
-        let value = match self.get_number(&args[0], cell) {
-            Ok(f) => f,
-            Err(s) => return s,
-        };
-        if value < 0.0 {
-            return CalcResult::Error {
-                error: Error::NUM,
-                origin: cell,
-                message: "Argument of SQRTPI should be >= 0".to_string(),
-            };
-        }
-        CalcResult::Number((value * PI).sqrt())
-    }
-
-    pub(crate) fn fn_sqrt(&mut self, args: &[Node], cell: CellReferenceIndex) -> CalcResult {
-        if args.len() != 1 {
-            return CalcResult::new_args_number_error(cell);
-        }
-        let value = match self.get_number(&args[0], cell) {
-            Ok(f) => f,
-            Err(s) => return s,
-        };
-        if value < 0.0 {
-            return CalcResult::Error {
-                error: Error::NUM,
-                origin: cell,
-                message: "Argument of SQRT should be >= 0".to_string(),
-            };
-        }
-        CalcResult::Number(value.sqrt())
-    }
-
     pub(crate) fn fn_atan2(&mut self, args: &[Node], cell: CellReferenceIndex) -> CalcResult {
         if args.len() != 2 {
             return CalcResult::new_args_number_error(cell);

base/src/functions/mod.rs

@@ -15,6 +15,7 @@ mod financial_util;
 mod information;
 mod logical;
 mod lookup_and_reference;
+mod macros;
 mod mathematical;
 mod statistical;
 mod subtotal;
@@ -1213,7 +1214,7 @@ mod tests {
         }
         // We make a list with their functions names, but we escape ".": ERROR.TYPE => ERRORTYPE
         let iter_list = Function::into_iter()
-            .map(|f| format!("{}", f).replace('.', ""))
+            .map(|f| format!("{f}").replace('.', ""))
             .collect::<Vec<_>>();
 
         let len = iter_list.len();

base/src/functions/statistical.rs

@@ -134,6 +134,13 @@ impl Model {
                                     );
                                 }
                                 CalcResult::EmptyCell | CalcResult::EmptyArg => {}
+                                CalcResult::Array(_) => {
+                                    return CalcResult::Error {
+                                        error: Error::NIMPL,
+                                        origin: cell,
+                                        message: "Arrays not supported yet".to_string(),
+                                    }
+                                }
                             }
                         }
                     }
@@ -165,6 +172,13 @@ impl Model {
                 }
                 error @ CalcResult::Error { .. } => return error,
                 CalcResult::EmptyCell | CalcResult::EmptyArg => {}
+                CalcResult::Array(_) => {
+                    return CalcResult::Error {
+                        error: Error::NIMPL,
+                        origin: cell,
+                        message: "Arrays not supported yet".to_string(),
+                    }
+                }
             };
         }
         if count == 0.0 {

base/src/functions/subtotal.rs

@@ -182,6 +182,13 @@ impl Model {
                             }
                         }
                         CalcResult::EmptyCell | CalcResult::EmptyArg => result.push(0.0),
+                        CalcResult::Array(_) => {
+                            return Err(CalcResult::Error {
+                                error: Error::NIMPL,
+                                origin: cell,
+                                message: "Arrays not supported yet".to_string(),
+                            })
+                        }
                     }
                 }
             }
@@ -426,6 +433,13 @@ impl Model {
                         | CalcResult::Number(_)
                         | CalcResult::Boolean(_)
                         | CalcResult::Error { .. } => counta += 1,
+                        CalcResult::Array(_) => {
+                            return CalcResult::Error {
+                                error: Error::NIMPL,
+                                origin: cell,
+                                message: "Arrays not supported yet".to_string(),
+                            }
+                        }
                     }
                 }
             }

base/src/functions/text.rs

@@ -55,14 +55,14 @@ impl Model {
         let mut result = "".to_string();
         for arg in args {
             match self.evaluate_node_in_context(arg, cell) {
-                CalcResult::String(value) => result = format!("{}{}", result, value),
+                CalcResult::String(value) => result = format!("{result}{value}"),
-                CalcResult::Number(value) => result = format!("{}{}", result, value),
+                CalcResult::Number(value) => result = format!("{result}{value}"),
                 CalcResult::EmptyCell | CalcResult::EmptyArg => {}
                 CalcResult::Boolean(value) => {
                     if value {
-                        result = format!("{}TRUE", result);
+                        result = format!("{result}TRUE");
                     } else {
-                        result = format!("{}FALSE", result);
+                        result = format!("{result}FALSE");
                     }
                 }
                 error @ CalcResult::Error { .. } => return error,
@@ -82,25 +82,37 @@ impl Model {
                                 column,
                             }) {
                                 CalcResult::String(value) => {
-                                    result = format!("{}{}", result, value);
+                                    result = format!("{result}{value}");
-                                }
-                                CalcResult::Number(value) => {
-                                    result = format!("{}{}", result, value)
                                 }
+                                CalcResult::Number(value) => result = format!("{result}{value}"),
                                 CalcResult::Boolean(value) => {
                                     if value {
-                                        result = format!("{}TRUE", result);
+                                        result = format!("{result}TRUE");
                                     } else {
-                                        result = format!("{}FALSE", result);
+                                        result = format!("{result}FALSE");
                                     }
                                 }
                                 error @ CalcResult::Error { .. } => return error,
                                 CalcResult::EmptyCell | CalcResult::EmptyArg => {}
                                 CalcResult::Range { .. } => {}
+                                CalcResult::Array(_) => {
+                                    return CalcResult::Error {
+                                        error: Error::NIMPL,
+                                        origin: cell,
+                                        message: "Arrays not supported yet".to_string(),
                                     }
                                 }
                             }
                         }
+                    }
+                }
+                CalcResult::Array(_) => {
+                    return CalcResult::Error {
+                        error: Error::NIMPL,
+                        origin: cell,
+                        message: "Arrays not supported yet".to_string(),
+                    }
+                }
             };
         }
         CalcResult::String(result)
@@ -125,6 +137,13 @@ impl Model {
                     };
                 }
                 CalcResult::EmptyCell | CalcResult::EmptyArg => 0.0,
+                CalcResult::Array(_) => {
+                    return CalcResult::Error {
+                        error: Error::NIMPL,
+                        origin: cell,
+                        message: "Arrays not supported yet".to_string(),
+                    }
+                }
             };
             let format_code = match self.get_string(&args[1], cell) {
                 Ok(s) => s,
@@ -261,7 +280,7 @@ impl Model {
     pub(crate) fn fn_len(&mut self, args: &[Node], cell: CellReferenceIndex) -> CalcResult {
         if args.len() == 1 {
             let s = match self.evaluate_node_in_context(&args[0], cell) {
-                CalcResult::Number(v) => format!("{}", v),
+                CalcResult::Number(v) => format!("{v}"),
                 CalcResult::String(v) => v,
                 CalcResult::Boolean(b) => {
                     if b {
@@ -280,6 +299,13 @@ impl Model {
                     };
                 }
                 CalcResult::EmptyCell | CalcResult::EmptyArg => "".to_string(),
+                CalcResult::Array(_) => {
+                    return CalcResult::Error {
+                        error: Error::NIMPL,
+                        origin: cell,
+                        message: "Arrays not supported yet".to_string(),
+                    }
+                }
             };
             return CalcResult::Number(s.chars().count() as f64);
         }
@@ -289,7 +315,7 @@ impl Model {
     pub(crate) fn fn_trim(&mut self, args: &[Node], cell: CellReferenceIndex) -> CalcResult {
         if args.len() == 1 {
             let s = match self.evaluate_node_in_context(&args[0], cell) {
-                CalcResult::Number(v) => format!("{}", v),
+                CalcResult::Number(v) => format!("{v}"),
                 CalcResult::String(v) => v,
                 CalcResult::Boolean(b) => {
                     if b {
@@ -308,6 +334,13 @@ impl Model {
                     };
                 }
                 CalcResult::EmptyCell | CalcResult::EmptyArg => "".to_string(),
+                CalcResult::Array(_) => {
+                    return CalcResult::Error {
+                        error: Error::NIMPL,
+                        origin: cell,
+                        message: "Arrays not supported yet".to_string(),
+                    }
+                }
             };
             return CalcResult::String(s.trim().to_owned());
         }
@@ -317,7 +350,7 @@ impl Model {
     pub(crate) fn fn_lower(&mut self, args: &[Node], cell: CellReferenceIndex) -> CalcResult {
         if args.len() == 1 {
             let s = match self.evaluate_node_in_context(&args[0], cell) {
-                CalcResult::Number(v) => format!("{}", v),
+                CalcResult::Number(v) => format!("{v}"),
                 CalcResult::String(v) => v,
                 CalcResult::Boolean(b) => {
                     if b {
@@ -336,6 +369,13 @@ impl Model {
                     };
                 }
                 CalcResult::EmptyCell | CalcResult::EmptyArg => "".to_string(),
+                CalcResult::Array(_) => {
+                    return CalcResult::Error {
+                        error: Error::NIMPL,
+                        origin: cell,
+                        message: "Arrays not supported yet".to_string(),
+                    }
+                }
             };
             return CalcResult::String(s.to_lowercase());
         }
@@ -345,7 +385,7 @@ impl Model {
     pub(crate) fn fn_unicode(&mut self, args: &[Node], cell: CellReferenceIndex) -> CalcResult {
         if args.len() == 1 {
             let s = match self.evaluate_node_in_context(&args[0], cell) {
-                CalcResult::Number(v) => format!("{}", v),
+                CalcResult::Number(v) => format!("{v}"),
                 CalcResult::String(v) => v,
                 CalcResult::Boolean(b) => {
                     if b {
@@ -370,6 +410,13 @@ impl Model {
                         message: "Empty cell".to_string(),
                     }
                 }
+                CalcResult::Array(_) => {
+                    return CalcResult::Error {
+                        error: Error::NIMPL,
+                        origin: cell,
+                        message: "Arrays not supported yet".to_string(),
+                    }
+                }
             };
 
             match s.chars().next() {
@@ -392,7 +439,7 @@ impl Model {
     pub(crate) fn fn_upper(&mut self, args: &[Node], cell: CellReferenceIndex) -> CalcResult {
         if args.len() == 1 {
             let s = match self.evaluate_node_in_context(&args[0], cell) {
-                CalcResult::Number(v) => format!("{}", v),
+                CalcResult::Number(v) => format!("{v}"),
                 CalcResult::String(v) => v,
                 CalcResult::Boolean(b) => {
                     if b {
@@ -411,6 +458,13 @@ impl Model {
                     };
                 }
                 CalcResult::EmptyCell | CalcResult::EmptyArg => "".to_string(),
+                CalcResult::Array(_) => {
+                    return CalcResult::Error {
+                        error: Error::NIMPL,
+                        origin: cell,
+                        message: "Arrays not supported yet".to_string(),
+                    }
+                }
             };
             return CalcResult::String(s.to_uppercase());
         }
@@ -422,7 +476,7 @@ impl Model {
             return CalcResult::new_args_number_error(cell);
         }
         let s = match self.evaluate_node_in_context(&args[0], cell) {
-            CalcResult::Number(v) => format!("{}", v),
+            CalcResult::Number(v) => format!("{v}"),
             CalcResult::String(v) => v,
             CalcResult::Boolean(b) => {
                 if b {
@@ -441,6 +495,13 @@ impl Model {
                 };
             }
             CalcResult::EmptyCell | CalcResult::EmptyArg => "".to_string(),
+            CalcResult::Array(_) => {
+                return CalcResult::Error {
+                    error: Error::NIMPL,
+                    origin: cell,
+                    message: "Arrays not supported yet".to_string(),
+                }
+            }
         };
         let num_chars = if args.len() == 2 {
             match self.evaluate_node_in_context(&args[1], cell) {
@@ -471,6 +532,13 @@ impl Model {
                     };
                 }
                 CalcResult::EmptyCell | CalcResult::EmptyArg => 0,
+                CalcResult::Array(_) => {
+                    return CalcResult::Error {
+                        error: Error::NIMPL,
+                        origin: cell,
+                        message: "Arrays not supported yet".to_string(),
+                    }
+                }
             }
         } else {
             1
@@ -490,7 +558,7 @@ impl Model {
             return CalcResult::new_args_number_error(cell);
         }
         let s = match self.evaluate_node_in_context(&args[0], cell) {
-            CalcResult::Number(v) => format!("{}", v),
+            CalcResult::Number(v) => format!("{v}"),
             CalcResult::String(v) => v,
             CalcResult::Boolean(b) => {
                 if b {
@@ -509,6 +577,13 @@ impl Model {
                 };
             }
             CalcResult::EmptyCell | CalcResult::EmptyArg => "".to_string(),
+            CalcResult::Array(_) => {
+                return CalcResult::Error {
+                    error: Error::NIMPL,
+                    origin: cell,
+                    message: "Arrays not supported yet".to_string(),
+                }
+            }
         };
         let num_chars = if args.len() == 2 {
             match self.evaluate_node_in_context(&args[1], cell) {
@@ -539,6 +614,13 @@ impl Model {
                     };
                 }
                 CalcResult::EmptyCell | CalcResult::EmptyArg => 0,
+                CalcResult::Array(_) => {
+                    return CalcResult::Error {
+                        error: Error::NIMPL,
+                        origin: cell,
+                        message: "Arrays not supported yet".to_string(),
+                    }
+                }
             }
         } else {
             1
@@ -558,7 +640,7 @@ impl Model {
             return CalcResult::new_args_number_error(cell);
         }
         let s = match self.evaluate_node_in_context(&args[0], cell) {
-            CalcResult::Number(v) => format!("{}", v),
+            CalcResult::Number(v) => format!("{v}"),
             CalcResult::String(v) => v,
             CalcResult::Boolean(b) => {
                 if b {
@@ -577,6 +659,13 @@ impl Model {
                 };
             }
             CalcResult::EmptyCell | CalcResult::EmptyArg => "".to_string(),
+            CalcResult::Array(_) => {
+                return CalcResult::Error {
+                    error: Error::NIMPL,
+                    origin: cell,
+                    message: "Arrays not supported yet".to_string(),
+                }
+            }
         };
         let start_num = match self.evaluate_node_in_context(&args[1], cell) {
             CalcResult::Number(v) => {
@@ -641,6 +730,13 @@ impl Model {
                 };
             }
             CalcResult::EmptyCell | CalcResult::EmptyArg => 0,
+            CalcResult::Array(_) => {
+                return CalcResult::Error {
+                    error: Error::NIMPL,
+                    origin: cell,
+                    message: "Arrays not supported yet".to_string(),
+                }
+            }
         };
         let mut result = "".to_string();
         let mut count: usize = 0;
@@ -983,6 +1079,13 @@ impl Model {
                                 }
                                 error @ CalcResult::Error { .. } => return error,
                                 CalcResult::EmptyArg | CalcResult::Range { .. } => {}
+                                CalcResult::Array(_) => {
+                                    return CalcResult::Error {
+                                        error: Error::NIMPL,
+                                        origin: cell,
+                                        message: "Arrays not supported yet".to_string(),
+                                    }
+                                }
                             }
                         }
                     }
@@ -1002,6 +1105,13 @@ impl Model {
                     }
                 }
                 CalcResult::EmptyArg => {}
+                CalcResult::Array(_) => {
+                    return CalcResult::Error {
+                        error: Error::NIMPL,
+                        origin: cell,
+                        message: "Arrays not supported yet".to_string(),
+                    }
+                }
             };
         }
         let result = values.join(&delimiter);
@@ -1125,6 +1235,11 @@ impl Model {
                 }
             }
             CalcResult::EmptyCell | CalcResult::EmptyArg => CalcResult::Number(0.0),
+            CalcResult::Array(_) => CalcResult::Error {
+                error: Error::NIMPL,
+                origin: cell,
+                message: "Arrays not supported yet".to_string(),
+            },
         }
     }
 

base/src/functions/util.rs

@@ -110,7 +110,7 @@ pub(crate) fn from_wildcard_to_regex(
 
     // And we have a valid Perl regex! (As Kim Kardashian said before me: "I know, right?")
     if exact {
-        return regex::Regex::new(&format!("^{}$", reg));
+        return regex::Regex::new(&format!("^{reg}$"));
     }
     regex::Regex::new(reg)
 }
@@ -393,10 +393,8 @@ pub(crate) fn build_criteria<'a>(value: &'a CalcResult) -> Box<dyn Fn(&CalcResul
             // An error will match an error (never a string that is an error)
             Box::new(move |x| result_is_equal_to_error(x, &error.to_string()))
         }
-        CalcResult::Range { left: _, right: _ } => {
+        CalcResult::Range { left: _, right: _ } => Box::new(move |_x| false),
-            // TODO: Implicit Intersection
+        CalcResult::Array(_) => Box::new(move |_x| false),
-            Box::new(move |_x| false)
-        }
         CalcResult::EmptyCell | CalcResult::EmptyArg => Box::new(result_is_equal_to_empty),
     }
 }

base/src/language/mod.rs

@@ -39,6 +39,6 @@ static LANGUAGES: Lazy<HashMap<String, Language>> = Lazy::new(|| {
 pub fn get_language(id: &str) -> Result<&Language, String> {
     let language = LANGUAGES
         .get(id)
-        .ok_or(format!("Language is not supported: '{}'", id))?;
+        .ok_or(format!("Language is not supported: '{id}'"))?;
     Ok(language)
 }

base/src/lib.rs

@@ -39,9 +39,9 @@ pub mod types;
 pub mod worksheet;
 
 mod actions;
+mod arithmetic;
 mod cast;
 mod constants;
-mod diffs;
 mod functions;
 mod implicit_intersection;
 mod model;

base/src/model.rs

@@ -106,15 +106,15 @@ pub struct Model {
     pub(crate) shared_strings: HashMap<String, usize>,
     /// An instance of the parser
     pub(crate) parser: Parser,
-    /// The list of cells with formulas that are evaluated of being evaluated
+    /// The list of cells with formulas that are evaluated or being evaluated
     pub(crate) cells: HashMap<(u32, i32, i32), CellState>,
     /// The locale of the model
     pub(crate) locale: Locale,
-    /// Tha language used
+    /// The language used
     pub(crate) language: Language,
     /// The timezone used to evaluate the model
     pub(crate) tz: Tz,
-    /// The view id. A view consist of a selected sheet and ranges.
+    /// The view id. A view consists of a selected sheet and ranges.
     pub(crate) view_id: u32,
 }
 
@@ -207,6 +207,17 @@ impl Model {
                     },
                 }
             }
+            Node::ImplicitIntersection {
+                automatic: _,
+                child,
+            } => match self.evaluate_node_with_reference(child, cell) {
+                CalcResult::Range { left, right } => CalcResult::Range { left, right },
+                _ => CalcResult::new_error(
+                    Error::ERROR,
+                    cell,
+                    format!("Error with Implicit Intersection in cell {cell:?}"),
+                ),
+            },
             _ => self.evaluate_node_in_context(node, cell),
         }
     }
@@ -256,27 +267,10 @@ impl Model {
     ) -> CalcResult {
         use Node::*;
         match node {
-            OpSumKind { kind, left, right } => {
+            OpSumKind { kind, left, right } => match kind {
-                // In the future once the feature try trait stabilizes we could use the '?' operator for this :)
+                OpSum::Add => self.handle_arithmetic(left, right, cell, &|f1, f2| Ok(f1 + f2)),
-                // See: https://play.rust-lang.org/?version=nightly&mode=debug&edition=2018&gist=236044e8321a1450988e6ffe5a27dab5
+                OpSum::Minus => self.handle_arithmetic(left, right, cell, &|f1, f2| Ok(f1 - f2)),
-                let l = match self.get_number(left, cell) {
+            },
-                    Ok(f) => f,
-                    Err(s) => {
-                        return s;
-                    }
-                };
-                let r = match self.get_number(right, cell) {
-                    Ok(f) => f,
-                    Err(s) => {
-                        return s;
-                    }
-                };
-                let result = match kind {
-                    OpSum::Add => l + r,
-                    OpSum::Minus => l - r,
-                };
-                CalcResult::Number(result)
-            }
             NumberKind(value) => CalcResult::Number(*value),
             StringKind(value) => CalcResult::String(value.replace(r#""""#, r#"""#)),
             BooleanKind(value) => CalcResult::Boolean(*value),
@@ -361,62 +355,30 @@ impl Model {
                         return s;
                     }
                 };
-                let result = format!("{}{}", l, r);
+                let result = format!("{l}{r}");
                 CalcResult::String(result)
             }
-            OpProductKind { kind, left, right } => {
+            OpProductKind { kind, left, right } => match kind {
-                let l = match self.get_number(left, cell) {
+                OpProduct::Times => {
-                    Ok(f) => f,
+                    self.handle_arithmetic(left, right, cell, &|f1, f2| Ok(f1 * f2))
-                    Err(s) => {
-                        return s;
                 }
-                };
+                OpProduct::Divide => self.handle_arithmetic(left, right, cell, &|f1, f2| {
-                let r = match self.get_number(right, cell) {
+                    if f2 == 0.0 {
-                    Ok(f) => f,
+                        Err(Error::DIV)
-                    Err(s) => {
+                    } else {
-                        return s;
+                        Ok(f1 / f2)
-                    }
-                };
-                let result = match kind {
-                    OpProduct::Times => l * r,
-                    OpProduct::Divide => {
-                        if r == 0.0 {
-                            return CalcResult::new_error(
-                                Error::DIV,
-                                cell,
-                                "Divide by Zero".to_string(),
-                            );
-                        }
-                        l / r
-                    }
-                };
-                CalcResult::Number(result)
                     }
+                }),
+            },
             OpPowerKind { left, right } => {
-                let l = match self.get_number(left, cell) {
+                self.handle_arithmetic(left, right, cell, &|f1, f2| Ok(f1.powf(f2)))
-                    Ok(f) => f,
-                    Err(s) => {
-                        return s;
-                    }
-                };
-                let r = match self.get_number(right, cell) {
-                    Ok(f) => f,
-                    Err(s) => {
-                        return s;
-                    }
-                };
-                // Deal with errors properly
-                CalcResult::Number(l.powf(r))
             }
             FunctionKind { kind, args } => self.evaluate_function(kind, args, cell),
             InvalidFunctionKind { name, args: _ } => {
-                CalcResult::new_error(Error::ERROR, cell, format!("Invalid function: {}", name))
+                CalcResult::new_error(Error::ERROR, cell, format!("Invalid function: {name}"))
             }
-            ArrayKind(_) => {
+            ArrayKind(s) => CalcResult::Array(s.to_owned()),
-                // TODO: NOT IMPLEMENTED
+            DefinedNameKind((name, scope, _)) => {
-                CalcResult::new_error(Error::NIMPL, cell, "Arrays not implemented".to_string())
-            }
-            DefinedNameKind((name, scope)) => {
                 if let Ok(Some(parsed_defined_name)) = self.get_parsed_defined_name(name, *scope) {
                     match parsed_defined_name {
                         ParsedDefinedName::CellReference(reference) => {
@@ -429,26 +391,26 @@ impl Model {
                         ParsedDefinedName::InvalidDefinedNameFormula => CalcResult::new_error(
                             Error::NAME,
                             cell,
-                            format!("Defined name \"{}\" is not a reference.", name),
+                            format!("Defined name \"{name}\" is not a reference."),
                         ),
                     }
                 } else {
                     CalcResult::new_error(
                         Error::NAME,
                         cell,
-                        format!("Defined name \"{}\" not found.", name),
+                        format!("Defined name \"{name}\" not found."),
                     )
                 }
             }
             TableNameKind(s) => CalcResult::new_error(
                 Error::NAME,
                 cell,
-                format!("table name \"{}\" not supported.", s),
+                format!("table name \"{s}\" not supported."),
             ),
             WrongVariableKind(s) => CalcResult::new_error(
                 Error::NAME,
                 cell,
-                format!("Variable name \"{}\" not found.", s),
+                format!("Variable name \"{s}\" not found."),
             ),
             CompareKind { kind, left, right } => {
                 let l = self.evaluate_node_in_context(left, cell);
@@ -525,9 +487,25 @@ impl Model {
             } => CalcResult::new_error(
                 Error::ERROR,
                 cell,
-                format!("Error parsing {}: {}", formula, message),
+                format!("Error parsing {formula}: {message}"),
             ),
             EmptyArgKind => CalcResult::EmptyArg,
+            ImplicitIntersection {
+                automatic: _,
+                child,
+            } => match self.evaluate_node_with_reference(child, cell) {
+                CalcResult::Range { left, right } => {
+                    match implicit_intersection(&cell, &Range { left, right }) {
+                        Some(cell_reference) => self.evaluate_cell(cell_reference),
+                        None => CalcResult::new_error(
+                            Error::VALUE,
+                            cell,
+                            format!("Error with Implicit Intersection in cell {cell:?}"),
+                        ),
+                    }
+                }
+                _ => self.evaluate_node_in_context(child, cell),
+            },
         }
     }
 
@@ -617,12 +595,15 @@ impl Model {
                     };
                 }
                 CalcResult::Range { left, right } => {
-                    let range = Range {
+                    if left.sheet == right.sheet
-                        left: *left,
+                        && left.row == right.row
-                        right: *right,
+                        && left.column == right.column
-                    };
-                    if let Some(intersection_cell) = implicit_intersection(&cell_reference, &range)
                     {
+                        let intersection_cell = CellReferenceIndex {
+                            sheet: left.sheet,
+                            column: left.column,
+                            row: left.row,
+                        };
                         let v = self.evaluate_cell(intersection_cell);
                         self.set_cell_value(cell_reference, &v);
                     } else {
@@ -639,10 +620,32 @@ impl Model {
                             f,
                             s,
                             o,
-                            m: "Invalid reference".to_string(),
+                            m: "Implicit Intersection not implemented".to_string(),
-                            ei: Error::VALUE,
+                            ei: Error::NIMPL,
                         };
                     }
+                    // if let Some(intersection_cell) = implicit_intersection(&cell_reference, &range)
+                    // {
+                    //     let v = self.evaluate_cell(intersection_cell);
+                    //     self.set_cell_value(cell_reference, &v);
+                    // } else {
+                    //     let o = match self.cell_reference_to_string(&cell_reference) {
+                    //         Ok(s) => s,
+                    //         Err(_) => "".to_string(),
+                    //     };
+                    //     *self.workbook.worksheets[sheet as usize]
+                    //         .sheet_data
+                    //         .get_mut(&row)
+                    //         .expect("expected a row")
+                    //         .get_mut(&column)
+                    //         .expect("expected a column") = Cell::CellFormulaError {
+                    //         f,
+                    //         s,
+                    //         o,
+                    //         m: "Invalid reference".to_string(),
+                    //         ei: Error::VALUE,
+                    //     };
+                    // }
                 }
                 CalcResult::EmptyCell | CalcResult::EmptyArg => {
                     *self.workbook.worksheets[sheet as usize]
@@ -652,6 +655,20 @@ impl Model {
                         .get_mut(&column)
                         .expect("expected a column") = Cell::CellFormulaNumber { f, s, v: 0.0 };
                 }
+                CalcResult::Array(_) => {
+                    *self.workbook.worksheets[sheet as usize]
+                        .sheet_data
+                        .get_mut(&row)
+                        .expect("expected a row")
+                        .get_mut(&column)
+                        .expect("expected a column") = Cell::CellFormulaError {
+                        f,
+                        s,
+                        o: "".to_string(),
+                        m: "Arrays not supported yet".to_string(),
+                        ei: Error::NIMPL,
+                    };
+                }
             }
         }
     }
@@ -680,7 +697,7 @@ impl Model {
             worksheet.color = Some(color.to_string());
             return Ok(());
         }
-        Err(format!("Invalid color: {}", color))
+        Err(format!("Invalid color: {color}"))
     }
 
     /// Changes the visibility of a sheet
@@ -865,11 +882,7 @@ impl Model {
 
         let worksheet_names = worksheets.iter().map(|s| s.get_name()).collect();
 
-        let defined_names = workbook
+        let defined_names = workbook.get_defined_names_with_scope();
-            .get_defined_names_with_scope()
-            .iter()
-            .map(|s| (s.0.to_owned(), s.1))
-            .collect();
         // add all tables
         // let mut tables = Vec::new();
         // for worksheet in worksheets {
@@ -1014,7 +1027,7 @@ impl Model {
         let source_sheet_name = self
             .workbook
             .worksheet(source.sheet)
-            .map_err(|e| format!("Could not find source worksheet: {}", e))?
+            .map_err(|e| format!("Could not find source worksheet: {e}"))?
             .get_name();
         if source.sheet != area.sheet {
             return Err("Source and area are in different sheets".to_string());
@@ -1028,7 +1041,7 @@ impl Model {
         let target_sheet_name = self
             .workbook
             .worksheet(target.sheet)
-            .map_err(|e| format!("Could not find target worksheet: {}", e))?
+            .map_err(|e| format!("Could not find target worksheet: {e}"))?
             .get_name();
         if let Some(formula) = value.strip_prefix('=') {
             let cell_reference = CellReferenceRC {
@@ -1048,7 +1061,7 @@ impl Model {
                     column_delta: target.column - source.column,
                 },
             );
-            Ok(format!("={}", formula_str))
+            Ok(format!("={formula_str}"))
         } else {
             Ok(value.to_string())
         }
@@ -1525,7 +1538,7 @@ impl Model {
         // If the formula fails to parse try adding a parenthesis
         // SUM(A1:A3  => SUM(A1:A3)
         if let Node::ParseErrorKind { .. } = parsed_formula {
-            let new_parsed_formula = self.parser.parse(&format!("{})", formula), &cell_reference);
+            let new_parsed_formula = self.parser.parse(&format!("{formula})"), &cell_reference);
             match new_parsed_formula {
                 Node::ParseErrorKind { .. } => {}
                 _ => parsed_formula = new_parsed_formula,

base/src/new_empty.rs

@@ -8,7 +8,7 @@ use crate::{
     expressions::{
         lexer::LexerMode,
         parser::{
-            stringify::{rename_sheet_in_node, to_rc_format},
+            stringify::{rename_sheet_in_node, to_rc_format, to_string},
             Parser,
         },
         types::CellReferenceRC,
@@ -17,7 +17,8 @@ use crate::{
     locale::get_locale,
     model::{get_milliseconds_since_epoch, Model, ParsedDefinedName},
     types::{
-        Metadata, SheetState, Workbook, WorkbookSettings, WorkbookView, Worksheet, WorksheetView,
+        DefinedName, Metadata, SheetState, Workbook, WorkbookSettings, WorkbookView, Worksheet,
+        WorksheetView,
     },
     utils::ParsedReference,
 };
@@ -144,12 +145,7 @@ impl Model {
 
     /// Reparses all formulas and defined names
     pub(crate) fn reset_parsed_structures(&mut self) {
-        let defined_names = self
+        let defined_names = self.workbook.get_defined_names_with_scope();
-            .workbook
-            .get_defined_names_with_scope()
-            .iter()
-            .map(|s| (s.0.to_owned(), s.1))
-            .collect();
         self.parser
             .set_worksheets_and_names(self.workbook.get_worksheet_names(), defined_names);
         self.parsed_formulas = vec![];
@@ -172,11 +168,11 @@ impl Model {
             .get_worksheet_names()
             .iter()
             .map(|s| s.to_uppercase())
-            .any(|x| x == format!("{}{}", base_name_uppercase, index))
+            .any(|x| x == format!("{base_name_uppercase}{index}"))
         {
             index += 1;
         }
-        let sheet_name = format!("{}{}", base_name, index);
+        let sheet_name = format!("{base_name}{index}");
         // Now we need a sheet_id
         let sheet_id = self.get_new_sheet_id();
         let view_ids: Vec<&u32> = self.workbook.views.keys().collect();
@@ -196,7 +192,7 @@ impl Model {
         sheet_id: Option<u32>,
     ) -> Result<(), String> {
         if !is_valid_sheet_name(sheet_name) {
-            return Err(format!("Invalid name for a sheet: '{}'", sheet_name));
+            return Err(format!("Invalid name for a sheet: '{sheet_name}'"));
         }
         if self
             .workbook
@@ -238,12 +234,12 @@ impl Model {
         if let Some(sheet_index) = self.get_sheet_index_by_name(old_name) {
             return self.rename_sheet_by_index(sheet_index, new_name);
         }
-        Err(format!("Could not find sheet {}", old_name))
+        Err(format!("Could not find sheet {old_name}"))
     }
 
     /// Renames a sheet and updates all existing references to that sheet.
     /// It can fail if:
-    ///   * The original index is too large
+    ///   * The original index is out of bounds
     ///   * The target sheet name already exists
     ///   * The target sheet name is invalid
     pub fn rename_sheet_by_index(
@@ -252,22 +248,20 @@ impl Model {
         new_name: &str,
     ) -> Result<(), String> {
         if !is_valid_sheet_name(new_name) {
-            return Err(format!("Invalid name for a sheet: '{}'.", new_name));
+            return Err(format!("Invalid name for a sheet: '{new_name}'."));
         }
         if self.get_sheet_index_by_name(new_name).is_some() {
-            return Err(format!("Sheet already exists: '{}'.", new_name));
+            return Err(format!("Sheet already exists: '{new_name}'."));
-        }
-        let worksheets = &self.workbook.worksheets;
-        let sheet_count = worksheets.len() as u32;
-        if sheet_index >= sheet_count {
-            return Err("Sheet index out of bounds".to_string());
         }
+        // Gets the new name and checks that a sheet with that index exists
+        let old_name = self.workbook.worksheet(sheet_index)?.get_name();
+
         // Parse all formulas with the old name
         // All internal formulas are R1C1
         self.parser.set_lexer_mode(LexerMode::R1C1);
-        // We use iter because the default would be a mut_iter and we don't need a mutable reference
+
-        let worksheets = &mut self.workbook.worksheets;
+        for worksheet in &mut self.workbook.worksheets {
-        for worksheet in worksheets {
+            // R1C1 formulas are not tied to a cell (but are tied to a cell)
             let cell_reference = &CellReferenceRC {
                 sheet: worksheet.get_name(),
                 row: 1,
@@ -281,11 +275,32 @@ impl Model {
             }
             worksheet.shared_formulas = formulas;
         }
-        // Se the mode back to A1
+
+        // Set the mode back to A1
         self.parser.set_lexer_mode(LexerMode::A1);
+
+        // We reparse all the defined names formulas
+        let mut defined_names = Vec::new();
+        // Defined names do not have a context, we can use anything
+        let cell_reference = &CellReferenceRC {
+            sheet: old_name.clone(),
+            row: 1,
+            column: 1,
+        };
+        for defined_name in &mut self.workbook.defined_names {
+            let mut t = self.parser.parse(&defined_name.formula, cell_reference);
+            rename_sheet_in_node(&mut t, sheet_index, new_name);
+            let formula = to_string(&t, cell_reference);
+            defined_names.push(DefinedName {
+                name: defined_name.name.clone(),
+                formula,
+                sheet_id: defined_name.sheet_id,
+            });
+        }
+        self.workbook.defined_names = defined_names;
+
         // Update the name of the worksheet
-        let worksheets = &mut self.workbook.worksheets;
+        self.workbook.worksheet_mut(sheet_index)?.set_name(new_name);
-        worksheets[sheet_index as usize].set_name(new_name);
         self.reset_parsed_structures();
         Ok(())
     }
@@ -347,14 +362,14 @@ impl Model {
         };
         let locale = match get_locale(locale_id) {
             Ok(l) => l.clone(),
-            Err(_) => return Err(format!("Invalid locale: {}", locale_id)),
+            Err(_) => return Err(format!("Invalid locale: {locale_id}")),
         };
 
         let milliseconds = get_milliseconds_since_epoch();
         let seconds = milliseconds / 1000;
         let dt = match DateTime::from_timestamp(seconds, 0) {
             Some(s) => s,
-            None => return Err(format!("Invalid timestamp: {}", milliseconds)),
+            None => return Err(format!("Invalid timestamp: {milliseconds}")),
         };
         // "2020-08-06T21:20:53Z
         let now = dt.format("%Y-%m-%dT%H:%M:%SZ").to_string();

base/src/number_format.rs

@@ -126,7 +126,7 @@ pub fn to_precision_str(value: f64, precision: usize) -> String {
     let exponent = value.abs().log10().floor();
     let base = value / 10.0_f64.powf(exponent);
     let base = format!("{0:.1$}", base, precision - 1);
-    let value = format!("{}e{}", base, exponent).parse::<f64>().unwrap_or({
+    let value = format!("{base}e{exponent}").parse::<f64>().unwrap_or({
         // TODO: do this in a way that does not require a possible error
         0.0
     });

base/src/styles.rs

@@ -154,7 +154,7 @@ impl Styles {
                 return Ok(cell_style.xf_id);
             }
         }
-        Err(format!("Style '{}' not found", style_name))
+        Err(format!("Style '{style_name}' not found"))
     }
 
     pub fn create_named_style(&mut self, style_name: &str, style: &Style) -> Result<(), String> {

base/src/test/mod.rs

@@ -28,7 +28,6 @@ mod test_fn_sumifs;
 mod test_fn_textbefore;
 mod test_fn_textjoin;
 mod test_fn_unicode;
-mod test_forward_references;
 mod test_frozen_rows_columns;
 mod test_general;
 mod test_math;
@@ -52,6 +51,7 @@ mod engineering;
 mod test_fn_offset;
 mod test_number_format;
 
+mod test_arrays;
 mod test_escape_quotes;
 mod test_extend;
 mod test_fn_fv;
@@ -59,6 +59,7 @@ mod test_fn_type;
 mod test_frozen_rows_and_columns;
 mod test_geomean;
 mod test_get_cell_content;
+mod test_implicit_intersection;
 mod test_issue_155;
 mod test_percentage;
 mod test_set_functions_error_handling;

base/src/test/test_arrays.rs

@@ -0,0 +1,13 @@
+#![allow(clippy::unwrap_used)]
+
+use crate::test::util::new_empty_model;
+
+#[test]
+fn sum_arrays() {
+    let mut model = new_empty_model();
+    model._set("A1", "=SUM({1,2,3}+{3,4,5})");
+
+    model.evaluate();
+
+    assert_eq!(model._get_text("A1"), *"18");
+}

base/src/test/test_fn_concatenate.rs

@@ -22,13 +22,14 @@ fn fn_concatenate() {
     model._set("B1", r#"=CONCATENATE(A1, A2, A3, "!")"#);
     // This will break once we implement the implicit intersection operator
     // It should be:
-    // model._set("B2", r#"=CONCATENATE(@A1:A3, "!")"#);
+    model._set("C2", r#"=CONCATENATE(@A1:A3, "!")"#);
     model._set("B2", r#"=CONCATENATE(A1:A3, "!")"#);
     model._set("B3", r#"=CONCAT(A1:A3, "!")"#);
 
     model.evaluate();
 
     assert_eq!(model._get_text("B1"), *"Hello my World!");
-    assert_eq!(model._get_text("B2"), *" my !");
+    assert_eq!(model._get_text("B2"), *"#N/IMPL!");
     assert_eq!(model._get_text("B3"), *"Hello my World!");
+    assert_eq!(model._get_text("C2"), *" my !");
 }

base/src/test/test_fn_formulatext.rs

@@ -30,8 +30,18 @@ fn implicit_intersection() {
     model._set("A2", "=FORMULATEXT(D1:E1)");
     model.evaluate();
 
-    assert_eq!(model._get_text("A1"), *"#ERROR!");
+    assert_eq!(model._get_text("A1"), *"#N/IMPL!");
-    assert_eq!(model._get_text("A2"), *"#ERROR!");
+    assert_eq!(model._get_text("A2"), *"#N/IMPL!");
+}
+
+#[test]
+fn implicit_intersection_operator() {
+    let mut model = new_empty_model();
+    model._set("A1", "=1 +  2");
+    model._set("B1", "=FORMULATEXT(@A:A)");
+    model.evaluate();
+
+    assert_eq!(model._get_text("B1"), *"#N/IMPL!");
 }
 
 #[test]

base/src/test/test_fn_or_xor.rs

@@ -174,7 +174,7 @@ fn fn_or_xor_no_arguments() {
         println!("Testing function: {func}");
 
         let mut model = new_empty_model();
-        model._set("A1", &format!("={}()", func));
+        model._set("A1", &format!("={func}()"));
         model.evaluate();
         assert_eq!(model._get_text("A1"), *"#ERROR!");
     }

base/src/test/test_fn_sum.rs

@@ -17,3 +17,19 @@ fn test_fn_sum_arguments() {
     assert_eq!(model._get_text("A3"), *"1");
     assert_eq!(model._get_text("A4"), *"4");
 }
+
+#[test]
+fn arrays() {
+    let mut model = new_empty_model();
+    model._set("A1", "=SUM({1, 2, 3})");
+    model._set("A2", "=SUM({1; 2; 3})");
+    model._set("A3", "=SUM({1, 2; 3, 4})");
+    model._set("A4", "=SUM({1, 2; 3, 4; 5, 6})");
+
+    model.evaluate();
+
+    assert_eq!(model._get_text("A1"), *"6");
+    assert_eq!(model._get_text("A2"), *"6");
+    assert_eq!(model._get_text("A3"), *"10");
+    assert_eq!(model._get_text("A4"), *"21");
+}

base/src/test/test_forward_references.rs

@@ -1,121 +0,0 @@
-#![allow(clippy::unwrap_used)]
-
-use crate::expressions::types::{Area, CellReferenceIndex};
-use crate::test::util::new_empty_model;
-
-#[test]
-fn test_forward_references() {
-    let mut model = new_empty_model();
-
-    // test single ref changed nd not changed
-    model._set("H8", "=F6*G9");
-    // tests areas
-    model._set("H9", "=SUM(D4:F6)");
-    // absolute coordinates
-    model._set("H10", "=$F$6");
-    // area larger than the source area
-    model._set("H11", "=SUM(D3:F6)");
-    // Test arguments and concat
-    model._set("H12", "=SUM(F6, D4:F6) & D4");
-    // Test range operator. This is syntax error for now.
-    // model._set("H13", "=SUM(D4:INDEX(D4:F5,4,2))");
-    // Test operations
-    model._set("H14", "=-D4+D5*F6/F5");
-
-    model.evaluate();
-
-    // Source Area is D4:F6
-    let source_area = &Area {
-        sheet: 0,
-        row: 4,
-        column: 4,
-        width: 3,
-        height: 3,
-    };
-
-    // We paste in B10
-    let target_row = 10;
-    let target_column = 2;
-    let result = model.forward_references(
-        source_area,
-        &CellReferenceIndex {
-            sheet: 0,
-            row: target_row,
-            column: target_column,
-        },
-    );
-    assert!(result.is_ok());
-    model.evaluate();
-
-    assert_eq!(model._get_formula("H8"), "=D12*G9");
-    assert_eq!(model._get_formula("H9"), "=SUM(B10:D12)");
-    assert_eq!(model._get_formula("H10"), "=$D$12");
-
-    assert_eq!(model._get_formula("H11"), "=SUM(D3:F6)");
-    assert_eq!(model._get_formula("H12"), "=SUM(D12,B10:D12)&B10");
-    // assert_eq!(model._get_formula("H13"), "=SUM(B10:INDEX(B10:D11,4,2))");
-    assert_eq!(model._get_formula("H14"), "=-B10+B11*D12/D11");
-}
-
-#[test]
-fn test_different_sheet() {
-    let mut model = new_empty_model();
-
-    // test single ref changed not changed
-    model._set("H8", "=F6*G9");
-    // tests areas
-    model._set("H9", "=SUM(D4:F6)");
-    // absolute coordinates
-    model._set("H10", "=$F$6");
-    // area larger than the source area
-    model._set("H11", "=SUM(D3:F6)");
-    // Test arguments and concat
-    model._set("H12", "=SUM(F6, D4:F6) & D4");
-    // Test range operator. This is syntax error for now.
-    // model._set("H13", "=SUM(D4:INDEX(D4:F5,4,2))");
-    // Test operations
-    model._set("H14", "=-D4+D5*F6/F5");
-
-    // Adds a new sheet
-    assert!(model.add_sheet("Sheet2").is_ok());
-
-    model.evaluate();
-
-    // Source Area is D4:F6
-    let source_area = &Area {
-        sheet: 0,
-        row: 4,
-        column: 4,
-        width: 3,
-        height: 3,
-    };
-
-    // We paste in Sheet2!B10
-    let target_row = 10;
-    let target_column = 2;
-    let result = model.forward_references(
-        source_area,
-        &CellReferenceIndex {
-            sheet: 1,
-            row: target_row,
-            column: target_column,
-        },
-    );
-    assert!(result.is_ok());
-    model.evaluate();
-
-    assert_eq!(model._get_formula("H8"), "=Sheet2!D12*G9");
-    assert_eq!(model._get_formula("H9"), "=SUM(Sheet2!B10:D12)");
-    assert_eq!(model._get_formula("H10"), "=Sheet2!$D$12");
-
-    assert_eq!(model._get_formula("H11"), "=SUM(D3:F6)");
-    assert_eq!(
-        model._get_formula("H12"),
-        "=SUM(Sheet2!D12,Sheet2!B10:D12)&Sheet2!B10"
-    );
-    // assert_eq!(model._get_formula("H13"), "=SUM(B10:INDEX(B10:D11,4,2))");
-    assert_eq!(
-        model._get_formula("H14"),
-        "=-Sheet2!B10+Sheet2!B11*Sheet2!D12/Sheet2!D11"
-    );
-}

base/src/test/test_implicit_intersection.rs

@@ -0,0 +1,50 @@
+#![allow(clippy::unwrap_used)]
+
+use crate::test::util::new_empty_model;
+
+#[test]
+fn simple_colum() {
+    let mut model = new_empty_model();
+    // We populate cells A1 to A3
+    model._set("A1", "1");
+    model._set("A2", "2");
+    model._set("A3", "3");
+
+    model._set("C2", "=@A1:A3");
+
+    model.evaluate();
+
+    assert_eq!(model._get_text("C2"), "2".to_string());
+}
+
+#[test]
+fn return_of_array_is_n_impl() {
+    let mut model = new_empty_model();
+    // We populate cells A1 to A3
+    model._set("A1", "1");
+    model._set("A2", "2");
+    model._set("A3", "3");
+
+    model._set("C2", "=A1:A3");
+    model._set("D2", "=SUM(SIN(A:A)");
+
+    model.evaluate();
+
+    assert_eq!(model._get_text("C2"), "#N/IMPL!".to_string());
+    assert_eq!(model._get_text("D2"), "1.89188842".to_string());
+}
+
+#[test]
+fn concat() {
+    let mut model = new_empty_model();
+    model._set("A1", "=CONCAT(@B1:B3)");
+    model._set("A2", "=CONCAT(B1:B3)");
+    model._set("B1", "Hello");
+    model._set("B2", " ");
+    model._set("B3", "world!");
+
+    model.evaluate();
+
+    assert_eq!(model._get_text("A1"), *"Hello");
+    assert_eq!(model._get_text("A2"), *"Hello world!");
+}

base/src/test/test_styles.rs

@@ -62,3 +62,17 @@ fn test_create_named_style() {
     let style = model.get_style_for_cell(0, 1, 1).unwrap();
     assert!(style.font.b);
 }
+
+#[test]
+fn empty_models_have_two_fills() {
+    let model = new_empty_model();
+    assert_eq!(model.workbook.styles.fills.len(), 2);
+    assert_eq!(
+        model.workbook.styles.fills[0].pattern_type,
+        "none".to_string()
+    );
+    assert_eq!(
+        model.workbook.styles.fills[1].pattern_type,
+        "gray125".to_string()
+    );
+}

base/src/test/user_model/test_border.rs

@@ -50,10 +50,7 @@ fn check_borders(model: &UserModel) {
                         assert_eq!(
                             Some(top_border),
                             top_cell_style.border.bottom,
-                            "(Top). Sheet: {}, row: {}, column: {}",
+                            "(Top). Sheet: {sheet}, row: {row}, column: {column}"
-                            sheet,
-                            row,
-                            column
                         );
                     }
                 }
@@ -65,10 +62,7 @@ fn check_borders(model: &UserModel) {
                         assert_eq!(
                             Some(right_border),
                             right_cell_style.border.left,
-                            "(Right). Sheet: {}, row: {}, column: {}",
+                            "(Right). Sheet: {sheet}, row: {row}, column: {column}"
-                            sheet,
-                            row,
-                            column
                         );
                     }
                 }
@@ -80,10 +74,7 @@ fn check_borders(model: &UserModel) {
                         assert_eq!(
                             Some(bottom_border),
                             bottom_cell_style.border.top,
-                            "(Bottom). Sheet: {}, row: {}, column: {}",
+                            "(Bottom). Sheet: {sheet}, row: {row}, column: {column}"
-                            sheet,
-                            row,
-                            column
                         );
                     }
                 }
@@ -94,10 +85,7 @@ fn check_borders(model: &UserModel) {
                         assert_eq!(
                             Some(left_border),
                             left_cell_style.border.right,
-                            "(Left). Sheet: {}, row: {}, column: {}",
+                            "(Left). Sheet: {sheet}, row: {row}, column: {column}"
-                            sheet,
-                            row,
-                            column
                         );
                     }
                 }

base/src/test/user_model/test_defined_names.rs

@@ -423,3 +423,30 @@ fn change_scope_to_first_sheet() {
         Ok("#NAME?".to_string())
     );
 }
+
+#[test]
+fn rename_sheet() {
+    let mut model = UserModel::new_empty("model", "en", "UTC").unwrap();
+    model.new_sheet().unwrap();
+    model.set_user_input(0, 1, 1, "Hello").unwrap();
+
+    model
+        .new_defined_name("myName", None, "Sheet1!$A$1")
+        .unwrap();
+
+    model
+        .set_user_input(0, 2, 1, r#"=CONCATENATE(MyName, " world!")"#)
+        .unwrap();
+
+    assert_eq!(
+        model.get_formatted_cell_value(0, 2, 1),
+        Ok("Hello world!".to_string())
+    );
+
+    model.rename_sheet(0, "AnotherName").unwrap();
+
+    assert_eq!(
+        model.get_formatted_cell_value(0, 2, 1),
+        Ok("Hello world!".to_string())
+    );
+}

base/src/test/user_model/test_general.rs

@@ -26,7 +26,7 @@ fn set_user_input_errors() {
 #[test]
 fn user_model_debug_message() {
     let model = UserModel::new_empty("model", "en", "UTC").unwrap();
-    let s = &format!("{:?}", model);
+    let s = &format!("{model:?}");
     assert_eq!(s, "UserModel");
 }
 

base/src/test/user_model/util.rs

@@ -11,11 +11,10 @@ impl UserModel {
             r##"{{
                 "item": {{
                     "style": "thin",
-                    "color": "{}"
+                    "color": "{color}"
                 }},
                 "type": "All"
-            }}"##,
+            }}"##
-            color
         ))
         .unwrap();
         let range = &Area {
@@ -40,11 +39,10 @@ impl UserModel {
             r##"{{
                 "item": {{
                     "style": "thin",
-                    "color": "{}"
+                    "color": "{color}"
                 }},
-                "type": "{}"
+                "type": "{kind}"
-            }}"##,
+            }}"##
-            color, kind
         ))
         .unwrap();
         let range = &Area {

base/src/test/util.rs

@@ -13,7 +13,7 @@ impl Model {
         if cell.contains('!') {
             self.parse_reference(cell).unwrap()
         } else {
-            self.parse_reference(&format!("Sheet1!{}", cell)).unwrap()
+            self.parse_reference(&format!("Sheet1!{cell}")).unwrap()
         }
     }
     pub fn _set(&mut self, cell: &str, value: &str) {

base/src/types.rs

@@ -303,7 +303,14 @@ impl Default for Styles {
         Styles {
             num_fmts: vec![],
             fonts: vec![Default::default()],
-            fills: vec![Default::default()],
+            fills: vec![
+                Default::default(),
+                Fill {
+                    pattern_type: "gray125".to_string(),
+                    fg_color: None,
+                    bg_color: None,
+                },
+            ],
             borders: vec![Default::default()],
             cell_style_xfs: vec![Default::default()],
             cell_xfs: vec![Default::default()],

base/src/units.rs

@@ -299,6 +299,7 @@ impl Model {
             Node::WrongVariableKind(_) => None,
             Node::CompareKind { .. } => None,
             Node::OpPowerKind { .. } => None,
+            Node::ImplicitIntersection { .. } => None,
         }
     }
 

base/src/user_model/common.rs

@@ -1487,10 +1487,10 @@ impl UserModel {
             return Err(format!("Invalid row: '{first_row}'"));
         }
         if !is_valid_column_number(last_column) {
-            return Err(format!("Invalid column: '{}'", last_column));
+            return Err(format!("Invalid column: '{last_column}'"));
         }
         if !is_valid_row(last_row) {
-            return Err(format!("Invalid row: '{}'", last_row));
+            return Err(format!("Invalid row: '{last_row}'"));
         }
 
         if !is_valid_row(to_column) {
@@ -1623,15 +1623,15 @@ impl UserModel {
                 text_row.push(text);
             }
             wtr.write_record(text_row)
-                .map_err(|e| format!("Error while processing csv: {}", e))?;
+                .map_err(|e| format!("Error while processing csv: {e}"))?;
             data.insert(row, data_row);
         }
 
         let csv = String::from_utf8(
             wtr.into_inner()
-                .map_err(|e| format!("Processing error: '{}'", e))?,
+                .map_err(|e| format!("Processing error: '{e}'"))?,
         )
-        .map_err(|e| format!("Error converting from utf8: '{}'", e))?;
+        .map_err(|e| format!("Error converting from utf8: '{e}'"))?;
 
         Ok(Clipboard {
             csv,
@@ -2391,7 +2391,7 @@ mod tests {
             VerticalAlignment::Top,
         ];
         for a in all {
-            assert_eq!(vertical(&format!("{}", a)), Ok(a));
+            assert_eq!(vertical(&format!("{a}")), Ok(a));
         }
     }
 
@@ -2408,7 +2408,7 @@ mod tests {
             HorizontalAlignment::Right,
         ];
         for a in all {
-            assert_eq!(horizontal(&format!("{}", a)), Ok(a));
+            assert_eq!(horizontal(&format!("{a}")), Ok(a));
         }
     }
 }

base/src/user_model/ui.rs

@@ -76,7 +76,7 @@ impl UserModel {
     /// Sets the the selected sheet
     pub fn set_selected_sheet(&mut self, sheet: u32) -> Result<(), String> {
         if self.model.workbook.worksheet(sheet).is_err() {
-            return Err(format!("Invalid worksheet index {}", sheet));
+            return Err(format!("Invalid worksheet index {sheet}"));
         }
         if let Some(view) = self.model.workbook.views.get_mut(&0) {
             view.sheet = sheet;
@@ -98,7 +98,7 @@ impl UserModel {
             return Err(format!("Invalid row: '{row}'"));
         }
         if self.model.workbook.worksheet(sheet).is_err() {
-            return Err(format!("Invalid worksheet index {}", sheet));
+            return Err(format!("Invalid worksheet index {sheet}"));
         }
         if let Ok(worksheet) = self.model.workbook.worksheet_mut(sheet) {
             if let Some(view) = worksheet.views.get_mut(&0) {
@@ -138,7 +138,7 @@ impl UserModel {
             return Err(format!("Invalid row: '{end_row}'"));
         }
         if self.model.workbook.worksheet(sheet).is_err() {
-            return Err(format!("Invalid worksheet index {}", sheet));
+            return Err(format!("Invalid worksheet index {sheet}"));
         }
         if let Ok(worksheet) = self.model.workbook.worksheet_mut(sheet) {
             if let Some(view) = worksheet.views.get_mut(&0) {
@@ -147,14 +147,12 @@ impl UserModel {
                 // The selected cells must be on one of the corners of the selected range:
                 if selected_row != start_row && selected_row != end_row {
                     return Err(format!(
-                        "The selected cells is not in one of the corners. Row: '{}' and row range '({}, {})'",
+                        "The selected cells is not in one of the corners. Row: '{selected_row}' and row range '({start_row}, {end_row})'"
-                        selected_row, start_row, end_row
                     ));
                 }
                 if selected_column != start_column && selected_column != end_column {
                     return Err(format!(
-                        "The selected cells is not in one of the corners. Column '{}' and column range '({}, {})'",
+                        "The selected cells is not in one of the corners. Column '{selected_column}' and column range '({start_column}, {end_column})'"
-                        selected_column, start_column, end_column
                     ));
                 }
                 view.range = [start_row, start_column, end_row, end_column];
@@ -307,7 +305,7 @@ impl UserModel {
             return Err(format!("Invalid row: '{top_row}'"));
         }
         if self.model.workbook.worksheet(sheet).is_err() {
-            return Err(format!("Invalid worksheet index {}", sheet));
+            return Err(format!("Invalid worksheet index {sheet}"));
         }
         if let Ok(worksheet) = self.model.workbook.worksheet_mut(sheet) {
             if let Some(view) = worksheet.views.get_mut(&0) {

base/src/workbook.rs

@@ -1,6 +1,6 @@
 use std::vec::Vec;
 
-use crate::types::*;
+use crate::{expressions::parser::DefinedNameS, types::*};
 
 impl Workbook {
     pub fn get_worksheet_names(&self) -> Vec<String> {
@@ -29,7 +29,7 @@ impl Workbook {
     }
 
     /// Returns the a list of defined names in the workbook with their scope
-    pub fn get_defined_names_with_scope(&self) -> Vec<(String, Option<u32>, String)> {
+    pub fn get_defined_names_with_scope(&self) -> Vec<DefinedNameS> {
         let sheet_id_index: Vec<u32> = self.worksheets.iter().map(|s| s.sheet_id).collect();
 
         let defined_names = self

bindings/wasm/Cargo.toml

@@ -16,7 +16,7 @@ crate-type = ["cdylib"]
 # https://doc.rust-lang.org/cargo/reference/specifying-dependencies.html#multiple-locations
 ironcalc_base = { path = "../../base", version = "0.5", features = ["use_regex_lite"] }
 serde = { version = "1.0", features = ["derive"] }
-wasm-bindgen = "0.2.92"
+wasm-bindgen = "0.2.100"
 serde-wasm-bindgen = "0.4"
 
 [dev-dependencies]

bindings/wasm/Makefile

@@ -9,7 +9,7 @@ endif
 all:
 	wasm-pack build --target web --scope ironcalc --release
 	cp README.pkg.md pkg/README.md
-	tsc types.ts --target esnext --module esnext
+	npx tsc types.ts --target esnext --module esnext
 	$(PYTHON) fix_types.py
 	rm -f types.js
 
@@ -26,4 +26,4 @@ clean:
 	rm -rf pkg
 	rm -f types.js
 
-.PHONY: all lint clean
+.PHONY: all lint clean tests

bindings/wasm/fix_types.py

@@ -1,231 +1,25 @@
-# Regrettably at the time of writing there is not a perfect way to
-# generate the TypeScript types from Rust so we basically fix them manually
-# Hopefully this will suffice for our needs and one day will be automatic
-
 header = r"""
 /* tslint:disable */
 /* eslint-disable */
 """.strip()
 
-get_tokens_str = r"""
+def fix_types(text: str):
-* @returns {any}
-*/
-export function getTokens(formula: string): any;
-""".strip()
-
-get_tokens_str_types = r"""
-* @returns {MarkedToken[]}
-*/
-export function getTokens(formula: string): MarkedToken[];
-""".strip()
-
-update_style_str = r"""
-/**
-* @param {any} range
-* @param {string} style_path
-* @param {string} value
-*/
-  updateRangeStyle(range: any, style_path: string, value: string): void;
-""".strip()
-
-update_style_str_types = r"""
-/**
-* @param {Area} range
-* @param {string} style_path
-* @param {string} value
-*/
-  updateRangeStyle(range: Area, style_path: string, value: string): void;
-""".strip()
-
-properties = r"""
-/**
-* @returns {any}
-*/
-  getWorksheetsProperties(): any;
-""".strip()
-
-properties_types = r"""
-/**
-* @returns {WorksheetProperties[]}
-*/
-  getWorksheetsProperties(): WorksheetProperties[];
-""".strip()
-
-style = r"""
-* @returns {any}
-*/
-  getCellStyle(sheet: number, row: number, column: number): any;
-""".strip()
-
-style_types = r"""
-* @returns {CellStyle}
-*/
-  getCellStyle(sheet: number, row: number, column: number): CellStyle;
-""".strip()
-
-view = r"""
-* @returns {any}
-*/
-  getSelectedView(): any;
-""".strip()
-
-view_types = r"""
-* @returns {CellStyle}
-*/
-  getSelectedView(): SelectedView;
-""".strip()
-
-autofill_rows = r"""
-/**
-* @param {any} source_area
-* @param {number} to_row
-*/
-  autoFillRows(source_area: any, to_row: number): void;
-"""
-
-autofill_rows_types = r"""
-/**
-* @param {Area} source_area
-* @param {number} to_row
-*/
-  autoFillRows(source_area: Area, to_row: number): void;
-"""
-
-autofill_columns = r"""
-/**
-* @param {any} source_area
-* @param {number} to_column
-*/
-  autoFillColumns(source_area: any, to_column: number): void;
-"""
-
-autofill_columns_types = r"""
-/**
-* @param {Area} source_area
-* @param {number} to_column
-*/
-  autoFillColumns(source_area: Area, to_column: number): void;
-"""
-
-set_cell_style = r"""
-/**
-* @param {any} styles
-*/
-  onPasteStyles(styles: any): void;
-"""
-
-set_cell_style_types = r"""
-/**
-* @param {CellStyle[][]} styles
-*/
-  onPasteStyles(styles: CellStyle[][]): void;
-"""
-
-set_area_border = r"""
-/**
-* @param {any} area
-* @param {any} border_area
-*/
-  setAreaWithBorder(area: any, border_area: any): void;
-"""
-
-set_area_border_types = r"""
-/**
-* @param {Area} area
-* @param {BorderArea} border_area
-*/
-  setAreaWithBorder(area: Area, border_area: BorderArea): void;
-"""
-
-paste_csv_string = r"""
-/**
-* @param {any} area
-* @param {string} csv
-*/
-  pasteCsvText(area: any, csv: string): void;
-"""
-
-paste_csv_string_types = r"""
-/**
-* @param {Area} area
-* @param {string} csv
-*/
-  pasteCsvText(area: Area, csv: string): void;
-"""
-
-clipboard = r"""
-/**
-* @returns {any}
-*/
-  copyToClipboard(): any;
-"""
-
-clipboard_types = r"""
-/**
-* @returns {Clipboard}
-*/
-  copyToClipboard(): Clipboard;
-"""
-
-paste_from_clipboard = r"""
-/**
-* @param {number} source_sheet
-* @param {any} source_range
-* @param {any} clipboard
-* @param {boolean} is_cut
-*/
-  pasteFromClipboard(source_sheet: number, source_range: any, clipboard: any, is_cut: boolean): void;
-"""
-
-paste_from_clipboard_types = r"""
-/**
-* @param {number} source_sheet
-* @param {[number, number, number, number]} source_range
-* @param {ClipboardData} clipboard
-* @param {boolean} is_cut
-*/
-  pasteFromClipboard(source_sheet: number, source_range: [number, number, number, number], clipboard: ClipboardData, is_cut: boolean): void;
-"""
-
-defined_name_list = r"""
-/**
-* @returns {any}
-*/
-  getDefinedNameList(): any;
-"""
-
-defined_name_list_types = r"""
-/**
-* @returns {DefinedName[]}
-*/
-  getDefinedNameList(): DefinedName[];
-"""
-
-def fix_types(text):
-    text = text.replace(get_tokens_str, get_tokens_str_types)
-    text = text.replace(update_style_str, update_style_str_types)
-    text = text.replace(properties, properties_types)
-    text = text.replace(style, style_types)
-    text = text.replace(view, view_types)
-    text = text.replace(autofill_rows, autofill_rows_types)
-    text = text.replace(autofill_columns, autofill_columns_types)
-    text = text.replace(set_cell_style, set_cell_style_types)
-    text = text.replace(set_area_border, set_area_border_types)
-    text = text.replace(paste_csv_string, paste_csv_string_types)
-    text = text.replace(clipboard, clipboard_types)
-    text = text.replace(paste_from_clipboard, paste_from_clipboard_types)
-    text = text.replace(defined_name_list, defined_name_list_types)
     with open("types.ts") as f:
         types_str = f.read()
         header_types = "{}\n\n{}".format(header, types_str)
+    
     text = text.replace(header, header_types)
-    if text.find("any") != -1:
+    for line in text.splitlines():
-        print("There are 'unfixed' types. Please check.")
+        line = line.lstrip()
+        # Skip internal methods
+        if line.startswith("readonly model_"):
+            continue
+        if line.find("any") != -1:
+            print("There are 'unfixed' public types. Please check.")
             exit(1)
+
     return text
 
-
-
 if __name__ == "__main__":
     types_file = "pkg/wasm.d.ts"
     with open(types_file) as f:
@@ -243,5 +37,3 @@ if __name__ == "__main__":
     with open(js_file, "wb") as f:
         f.write(bytes("{}\n{}".format(text_js, text), "utf8"))
     
-
-    

bindings/wasm/src/lib.rs

@@ -16,7 +16,7 @@ fn to_js_error(error: String) -> JsError {
 
 /// Return an array with a list of all the tokens from a formula
 /// This is used by the UI to color them according to a theme.
-#[wasm_bindgen(js_name = "getTokens")]
+#[wasm_bindgen(js_name = "getTokens", unchecked_return_type = "MarkedToken[]")]
 pub fn get_tokens(formula: &str) -> Result<JsValue, JsError> {
     let tokens = tokenizer(formula);
     serde_wasm_bindgen::to_value(&tokens).map_err(JsError::from)
@@ -338,7 +338,7 @@ impl Model {
     #[wasm_bindgen(js_name = "updateRangeStyle")]
     pub fn update_range_style(
         &mut self,
-        range: JsValue,
+        #[wasm_bindgen(unchecked_param_type = "Area")] range: JsValue,
         style_path: &str,
         value: &str,
     ) -> Result<(), JsError> {
@@ -349,7 +349,7 @@ impl Model {
             .map_err(to_js_error)
     }
 
-    #[wasm_bindgen(js_name = "getCellStyle")]
+    #[wasm_bindgen(js_name = "getCellStyle", unchecked_return_type = "CellStyle")]
     pub fn get_cell_style(
         &mut self,
         sheet: u32,
@@ -365,7 +365,10 @@ impl Model {
     }
 
     #[wasm_bindgen(js_name = "onPasteStyles")]
-    pub fn on_paste_styles(&mut self, styles: JsValue) -> Result<(), JsError> {
+    pub fn on_paste_styles(
+        &mut self,
+        #[wasm_bindgen(unchecked_param_type = "CellStyle[][]")] styles: JsValue,
+    ) -> Result<(), JsError> {
         let styles: &Vec<Vec<Style>> =
             &serde_wasm_bindgen::from_value(styles).map_err(|e| to_js_error(e.to_string()))?;
         self.model.on_paste_styles(styles).map_err(to_js_error)
@@ -391,7 +394,10 @@ impl Model {
 
     // I don't _think_ serializing to JsValue can't fail
     // FIXME: Remove this clippy directive
-    #[wasm_bindgen(js_name = "getWorksheetsProperties")]
+    #[wasm_bindgen(
+        js_name = "getWorksheetsProperties",
+        unchecked_return_type = "WorksheetProperties[]"
+    )]
     #[allow(clippy::unwrap_used)]
     pub fn get_worksheets_properties(&self) -> JsValue {
         serde_wasm_bindgen::to_value(&self.model.get_worksheets_properties()).unwrap()
@@ -410,7 +416,7 @@ impl Model {
 
     // I don't _think_ serializing to JsValue can't fail
     // FIXME: Remove this clippy directive
-    #[wasm_bindgen(js_name = "getSelectedView")]
+    #[wasm_bindgen(js_name = "getSelectedView", unchecked_return_type = "SelectedView")]
     #[allow(clippy::unwrap_used)]
     pub fn get_selected_view(&self) -> JsValue {
         serde_wasm_bindgen::to_value(&self.model.get_selected_view()).unwrap()
@@ -469,7 +475,11 @@ impl Model {
     }
 
     #[wasm_bindgen(js_name = "autoFillRows")]
-    pub fn auto_fill_rows(&mut self, source_area: JsValue, to_row: i32) -> Result<(), JsError> {
+    pub fn auto_fill_rows(
+        &mut self,
+        #[wasm_bindgen(unchecked_param_type = "Area")] source_area: JsValue,
+        to_row: i32,
+    ) -> Result<(), JsError> {
         let area: Area =
             serde_wasm_bindgen::from_value(source_area).map_err(|e| to_js_error(e.to_string()))?;
         self.model
@@ -480,7 +490,7 @@ impl Model {
     #[wasm_bindgen(js_name = "autoFillColumns")]
     pub fn auto_fill_columns(
         &mut self,
-        source_area: JsValue,
+        #[wasm_bindgen(unchecked_param_type = "Area")] source_area: JsValue,
         to_column: i32,
     ) -> Result<(), JsError> {
         let area: Area =
@@ -561,8 +571,8 @@ impl Model {
     #[wasm_bindgen(js_name = "setAreaWithBorder")]
     pub fn set_area_with_border(
         &mut self,
-        area: JsValue,
+        #[wasm_bindgen(unchecked_param_type = "Area")] area: JsValue,
-        border_area: JsValue,
+        #[wasm_bindgen(unchecked_param_type = "BorderArea")] border_area: JsValue,
     ) -> Result<(), JsError> {
         let range: Area =
             serde_wasm_bindgen::from_value(area).map_err(|e| to_js_error(e.to_string()))?;
@@ -589,7 +599,7 @@ impl Model {
         self.model.set_name(name);
     }
 
-    #[wasm_bindgen(js_name = "copyToClipboard")]
+    #[wasm_bindgen(js_name = "copyToClipboard", unchecked_return_type = "Clipboard")]
     pub fn copy_to_clipboard(&self) -> Result<JsValue, JsError> {
         let data = self
             .model
@@ -603,8 +613,9 @@ impl Model {
     pub fn paste_from_clipboard(
         &mut self,
         source_sheet: u32,
+        #[wasm_bindgen(unchecked_param_type = "[number, number, number, number]")]
         source_range: JsValue,
-        clipboard: JsValue,
+        #[wasm_bindgen(unchecked_param_type = "ClipboardData")] clipboard: JsValue,
         is_cut: bool,
     ) -> Result<(), JsError> {
         let source_range: (i32, i32, i32, i32) =
@@ -617,7 +628,11 @@ impl Model {
     }
 
     #[wasm_bindgen(js_name = "pasteCsvText")]
-    pub fn paste_csv_string(&mut self, area: JsValue, csv: &str) -> Result<(), JsError> {
+    pub fn paste_csv_string(
+        &mut self,
+        #[wasm_bindgen(unchecked_param_type = "Area")] area: JsValue,
+        csv: &str,
+    ) -> Result<(), JsError> {
         let range: Area =
             serde_wasm_bindgen::from_value(area).map_err(|e| to_js_error(e.to_string()))?;
         self.model
@@ -625,7 +640,10 @@ impl Model {
             .map_err(|e| to_js_error(e.to_string()))
     }
 
-    #[wasm_bindgen(js_name = "getDefinedNameList")]
+    #[wasm_bindgen(
+        js_name = "getDefinedNameList",
+        unchecked_return_type = "DefinedName[]"
+    )]
     pub fn get_defined_name_list(&self) -> Result<JsValue, JsError> {
         let data: Vec<DefinedName> = self
             .model

webapp/IronCalc/.storybook/main.ts

@@ -2,11 +2,7 @@ import type { StorybookConfig } from "@storybook/react-vite";
 
 const config: StorybookConfig = {
   stories: ["../src/**/*.mdx", "../src/**/*.stories.@(js|jsx|mjs|ts|tsx)"],
-  addons: [
+  addons: [],
-    "@storybook/addon-essentials",
-    "@chromatic-com/storybook",
-    "@storybook/addon-interactions",
-  ],
   framework: {
     name: "@storybook/react-vite",
     options: {},

webapp/IronCalc/package.json

@@ -18,31 +18,26 @@
     "@emotion/react": "^11.14.0",
     "@emotion/styled": "^11.14.0",
     "@ironcalc/wasm": "file:../../bindings/wasm/pkg",
-    "@mui/material": "^6.4",
+    "@mui/material": "^7.1.1",
-    "@mui/system": "^6.4",
+    "@mui/system": "^7.1.1",
-    "i18next": "^23.11.1",
+    "i18next": "^25.2.1",
-    "lucide-react": "^0.473.0",
+    "lucide-react": "^0.513.0",
     "react-colorful": "^5.6.1",
-    "react-i18next": "^15.4.0"
+    "react-i18next": "^15.5.2"
   },
   "devDependencies": {
     "@biomejs/biome": "1.9.4",
-    "@chromatic-com/storybook": "^3.2.4",
+    "@storybook/react": "^9.0.5",
-    "@storybook/addon-essentials": "^8.6.0",
+    "@storybook/react-vite": "^9.0.5",
-    "@storybook/addon-interactions": "^8.6.0",
-    "@storybook/blocks": "^8.6.0",
-    "@storybook/react": "^8.6.0",
-    "@storybook/react-vite": "^8.6.0",
-    "@storybook/test": "^8.6.0",
     "@vitejs/plugin-react": "^4.2.1",
-    "react": "^19.0.0",
+    "react": "^19.1.0",
-    "react-dom": "^19.0.0",
+    "react-dom": "^19.1.0",
-    "storybook": "^8.6.0",
+    "storybook": "^9.0.5",
     "ts-node": "^10.9.2",
-    "typescript": "~5.6.2",
+    "typescript": "~5.8.3",
-    "vite": "^6.2.0",
+    "vite": "^6.3.5",
     "vite-plugin-svgr": "^4.2.0",
-    "vitest": "^3.0.7"
+    "vitest": "^3.2.2"
   },
   "peerDependencies": {
     "@types/react": "^18.0.0 || ^19.0.0",

webapp/IronCalc/src/IronCalc.tsx

@@ -1,6 +1,6 @@
 import "./index.css";
 import type { Model } from "@ironcalc/wasm";
-import ThemeProvider from "@mui/material/styles/ThemeProvider";
+import { ThemeProvider } from "@mui/material";
 import Workbook from "./components/Workbook/Workbook.tsx";
 import { WorkbookState } from "./components/workbookState.ts";
 import { theme } from "./theme.ts";

webapp/IronCalc/src/components/BorderPicker/BorderPicker.tsx

@@ -262,6 +262,8 @@ const BorderPicker = (properties: BorderPickerProps) => {
         </BorderPickerDialog>
         <ColorPicker
           color={borderColor}
+          defaultColor="#000000"
+          title={t("color_picker.default")}
           onChange={(color): void => {
             setBorderColor(color);
             setColorPickerOpen(false);
@@ -359,7 +361,7 @@ const MediumLine = styled("div")`
 `;
 const ThickLine = styled("div")`
   width: 68px;
-  border-top: 1px solid ${theme.palette.grey["900"]};
+  border-top: 3px solid ${theme.palette.grey["900"]};
 `;
 
 const Divider = styled("div")`

webapp/IronCalc/src/components/ColorPicker/AdvancedColorPicker.tsx

@@ -0,0 +1,292 @@
+import styled from "@emotion/styled";
+import { Popover, type PopoverOrigin } from "@mui/material";
+import { Check } from "lucide-react";
+import { useEffect, useRef, useState } from "react";
+import { HexColorInput, HexColorPicker } from "react-colorful";
+import { useTranslation } from "react-i18next";
+import { theme } from "../../theme";
+
+type AdvancedColorPickerProps = {
+  color: string;
+  onAccept: (color: string) => void;
+  onCancel: () => void;
+  anchorEl: React.RefObject<HTMLElement | null>;
+  anchorOrigin: PopoverOrigin;
+  transformOrigin: PopoverOrigin;
+  open: boolean;
+};
+
+const AdvancedColorPicker = ({
+  color,
+  onAccept,
+  onCancel,
+  anchorEl,
+  anchorOrigin,
+  transformOrigin,
+  open,
+}: AdvancedColorPickerProps) => {
+  const [selectedColor, setSelectedColor] = useState<string>(color);
+  const recentColors = useRef<string[]>([]);
+  const { t } = useTranslation();
+
+  useEffect(() => {
+    setSelectedColor(color);
+  }, [color]);
+
+  const handleColorSelect = (color: string) => {
+    if (!recentColors.current.includes(color)) {
+      const maxRecentColors = 14;
+      recentColors.current = [color, ...recentColors.current].slice(
+        0,
+        maxRecentColors,
+      );
+    }
+    setSelectedColor(color);
+    onAccept(color);
+  };
+
+  return (
+    <StylePopover
+      open={open}
+      onClose={onCancel}
+      anchorEl={anchorEl.current}
+      anchorOrigin={anchorOrigin}
+      transformOrigin={transformOrigin}
+    >
+      <ColorPickerDialog>
+        <HexColorPicker
+          color={selectedColor}
+          onChange={(newColor): void => {
+            setSelectedColor(newColor);
+          }}
+        />
+        <HorizontalDivider />
+        <ColorPickerInput>
+          <HexWrapper>
+            <HexLabel>{"Hex"}</HexLabel>
+            <HexColorInputBox>
+              <HashLabel>{"#"}</HashLabel>
+              <StyledHexColorInput
+                color={selectedColor}
+                onChange={(newColor): void => {
+                  setSelectedColor(newColor);
+                }}
+                tabIndex={0}
+              />
+            </HexColorInputBox>
+          </HexWrapper>
+          <Swatch $color={selectedColor} />
+        </ColorPickerInput>
+        <HorizontalDivider />
+        <Buttons>
+          <CancelButton onClick={onCancel}>
+            {t("color_picker.cancel")}
+          </CancelButton>
+          <StyledButton
+            onClick={(): void => {
+              handleColorSelect(selectedColor);
+              onCancel();
+            }}
+          >
+            <Check />
+            {t("color_picker.apply")}
+          </StyledButton>
+        </Buttons>
+      </ColorPickerDialog>
+    </StylePopover>
+  );
+};
+
+const StylePopover = styled(Popover)`
+  & .MuiPaper-root {
+    border-radius: 8px;
+    padding: 0px;
+    margin-left: -4px;
+    max-width: 220px;
+  }
+`;
+
+const HorizontalDivider = styled.div`
+  height: 0px;
+  width: 100%;
+  border-top: 1px solid ${theme.palette.grey["200"]};
+`;
+
+// Color Picker Dialog Styles
+const ColorPickerDialog = styled.div`
+  background: ${theme.palette.background.default};
+  width: 240px;
+  padding: 0px;
+  display: flex;
+  flex-direction: column;
+  max-width: 100%;
+  & .react-colorful {
+    height: 160px;
+    width: 100%;
+  }
+  & .react-colorful__saturation {
+    border-bottom: none;
+    border-radius: 8px 8px 0px 0px;
+  }
+  & .react-colorful__hue {
+    height: 8px;
+    margin: 8px;
+    border-radius: 5px;
+  }
+  & .react-colorful__saturation-pointer {
+    width: 14px;
+    height: 14px;
+  }
+  & .react-colorful__hue-pointer {
+    width: 7px;
+    border-radius: 8px;
+    height: 16px;
+    width: 16px;
+  }
+`;
+
+const Buttons = styled.div`
+  display: flex;
+  justify-content: flex-end;
+  margin: 8px;
+  gap: 8px;
+`;
+
+const StyledButton = styled("div")`
+  cursor: pointer;
+  width: 100%;
+  color: ${theme.palette.primary.contrastText};
+  background: ${theme.palette.primary.main};
+  padding: 0px 10px;
+  height: 28px;
+  border-radius: 4px;
+  display: flex;
+  gap: 4px;
+  align-items: center;
+  justify-content: center;
+  font-family: "Inter";
+  font-size: 12px;
+  &:hover {
+    background: #d68742;
+  }
+  svg {
+    max-width: 12px;
+    max-height: 12px;
+  }
+`;
+
+const CancelButton = styled("div")`
+  cursor: pointer;
+  width: 100%;
+  color: ${theme.palette.grey[700]};
+  background: ${theme.palette.grey[200]};
+  padding: 0px 10px;
+  height: 28px;
+  border-radius: 4px;
+  display: flex;
+  gap: 4px;
+  align-items: center;
+  justify-content: center;
+  font-family: "Inter";
+  font-size: 12px;
+  &:hover {
+    background: ${theme.palette.grey[300]};
+  }
+  svg {
+    max-width: 12px;
+    max-height: 12px;
+  }
+`;
+
+const HashLabel = styled.div`
+  margin: auto 0px auto 10px;
+  font-size: 13px;
+  color: #333;
+  font-family: ${theme.typography.button.fontFamily};
+`;
+
+const HexLabel = styled.div`
+  margin: auto 0px;
+  font-size: 12px;
+  display: inline-flex;
+  font-family: ${theme.typography.button.fontFamily};
+`;
+
+const HexColorInputBox = styled.div`
+  display: inline-flex;
+  flex-grow: 1;
+  width: 100%;
+  height: 28px;
+  border: 1px solid ${theme.palette.grey["300"]};
+  border-radius: 5px;
+  &:hover {
+    border: 1px solid ${theme.palette.grey["600"]};
+  }
+  &:focus-within {
+    outline: 2px solid ${theme.palette.secondary.main};
+    outline-offset: 1px;
+  }
+`;
+
+const StyledHexColorInput = styled(HexColorInput)`
+  width: 100%;
+  border: none;
+  background: transparent;
+  outline: none;
+  font-family: ${theme.typography.button.fontFamily};
+  font-size: 12px;
+  text-transform: uppercase;
+  text-align: right;
+  padding-right: 10px;
+  border-radius: 5px;
+
+  &:focus {
+    border-color: #4298ef;
+  }
+`;
+
+const HexWrapper = styled.div`
+  display: flex;
+  gap: 8px;
+  flex-grow: 1;
+  & input {
+    min-width: 0px;
+    border: 0px;
+    background: ${theme.palette.background.default};
+    outline: none;
+    font-family: ${theme.typography.button.fontFamily};
+    font-size: 12px;
+    text-transform: uppercase;
+    text-align: right;
+    padding-right: 10px;
+    border-radius: 5px;
+  }
+
+  & input:focus {
+    border-color: #4298ef;
+  }
+`;
+
+const Swatch = styled.div<{ $color: string }>`
+  display: inline-flex;
+  ${({ $color }): string => {
+    if ($color.toUpperCase() === "#FFFFFF") {
+      return `border: 1px solid ${theme.palette.grey["300"]};`;
+    }
+    return `border: 1px solid ${$color};`;
+  }}
+  background-color: ${({ $color }): string => $color};
+  min-width: 28px;
+  height: 28px;
+  border-radius: 5px;
+`;
+
+const ColorPickerInput = styled.div`
+  display: flex;
+  flex-direction: row;
+  align-items: center;
+  margin: 8px;
+  gap: 8px;
+`;
+
+export default AdvancedColorPicker;

webapp/IronCalc/src/components/ColorPicker/ColorPicker.tsx

@@ -1,187 +1,278 @@
 import styled from "@emotion/styled";
-import Popover, { type PopoverOrigin } from "@mui/material/Popover";
+import { Menu, MenuItem, type PopoverOrigin } from "@mui/material";
-import { Check } from "lucide-react";
+import { Plus } from "lucide-react";
-import type React from "react";
 import { useEffect, useRef, useState } from "react";
-import { HexColorInput, HexColorPicker } from "react-colorful";
 import { useTranslation } from "react-i18next";
 import { theme } from "../../theme";
+import AdvancedColorPicker from "./AdvancedColorPicker";
 
 type ColorPickerProps = {
   color: string;
+  defaultColor: string;
+  title: string;
   onChange: (color: string) => void;
   onClose: () => void;
   anchorEl: React.RefObject<HTMLElement | null>;
-  anchorOrigin?: PopoverOrigin;
+  anchorOrigin: PopoverOrigin;
-  transformOrigin?: PopoverOrigin;
+  transformOrigin: PopoverOrigin;
   open: boolean;
 };
 
-const colorPickerWidth = 240;
+const ColorPicker = ({
-const colorfulHeight = 240;
+  color,
-
+  defaultColor,
-const ColorPicker = (properties: ColorPickerProps) => {
+  title,
-  const [color, setColor] = useState<string>(properties.color);
+  onChange,
+  onClose,
+  anchorEl,
+  anchorOrigin,
+  transformOrigin,
+  open,
+}: ColorPickerProps) => {
+  const [selectedColor, setSelectedColor] = useState<string>(color);
+  const [isPickerOpen, setPickerOpen] = useState(false);
   const recentColors = useRef<string[]>([]);
-
   const { t } = useTranslation();
 
-  const closePicker = (newColor: string): void => {
-    const maxRecentColors = 14;
-    const colors = recentColors.current.filter((c) => c !== newColor);
-    recentColors.current = [newColor, ...colors].slice(0, maxRecentColors);
-    properties.onChange(newColor);
-  };
-
-  const handleClose = (): void => {
-    properties.onClose();
-  };
-
   useEffect(() => {
-    setColor(properties.color);
+    setSelectedColor(color);
-  }, [properties.color]);
+  }, [color]);
 
-  const presetColors = [
+  const handleColorSelect = (color: string) => {
+    if (!recentColors.current.includes(color)) {
+      const maxRecentColors = 14;
+      recentColors.current = [color, ...recentColors.current].slice(
+        0,
+        maxRecentColors,
+      );
+    }
+    setSelectedColor(color || theme.palette.common.black);
+    onChange(color);
+    setPickerOpen(false);
+  };
+
+  const handleClose = () => {
+    setPickerOpen(false);
+    onClose();
+  };
+
+  // Colors definitions
+  const mainColors = [
     "#FFFFFF",
+    "#272525",
     "#1B717E",
-    "#59B9BC",
     "#3BB68A",
     "#8CB354",
     "#F8CD3C",
     "#F2994A",
     "#EC5753",
-    "#D03627",
     "#523E93",
     "#3358B7",
   ];
 
+  const lightTones = [
+    theme.palette.grey[50],
+    theme.palette.grey[100],
+    theme.palette.grey[200],
+    theme.palette.grey[300],
+    theme.palette.grey[400],
+  ];
+
+  const darkTones = [
+    theme.palette.grey[500],
+    theme.palette.grey[600],
+    theme.palette.grey[700],
+    theme.palette.grey[800],
+    theme.palette.grey[900],
+  ];
+
+  const tealTones = ["#BBD4D8", "#82B1B8", "#498D98", "#1E5A63", "#224348"];
+  const greenTones = ["#C4E9DC", "#93D7BF", "#62C5A1", "#358A6C", "#2F5F4D"];
+  const limeTones = ["#DDE8CC", "#C0D5A1", "#A3C276", "#6E8846", "#4F5E38"];
+  const yellowTones = ["#FDF0C5", "#FBE394", "#F9D764", "#B99A36", "#7A682E"];
+  const orangeTones = ["#FBE0C9", "#F8C79B", "#F5AD6E", "#B5763F", "#785334"];
+  const redTones = ["#F9CDCB", "#F5A3A0", "#F07975", "#B14845", "#763937"];
+  const purpleTones = ["#CBC5DF", "#A095C4", "#7565A9", "#453672", "#382F51"];
+  const blueTones = ["#C2CDE9", "#8FA3D7", "#5D79C5", "#30498B", "#2C395F"];
+
+  const toneArrays = [
+    lightTones,
+    darkTones,
+    tealTones,
+    greenTones,
+    limeTones,
+    yellowTones,
+    orangeTones,
+    redTones,
+    purpleTones,
+    blueTones,
+  ];
+
+  if (!open) {
+    return null;
+  }
+
+  if (isPickerOpen) {
     return (
-    <Popover
+      <AdvancedColorPicker
-      open={properties.open}
+        color={selectedColor}
+        onAccept={handleColorSelect}
+        onCancel={() => setPickerOpen(false)}
+        anchorEl={anchorEl}
+        anchorOrigin={anchorOrigin}
+        transformOrigin={transformOrigin}
+        open={true}
+      />
+    );
+  }
+
+  return (
+    <StyledMenu
+      anchorEl={anchorEl.current}
+      open={true}
       onClose={handleClose}
-      anchorEl={properties.anchorEl.current}
+      anchorOrigin={anchorOrigin}
-      anchorOrigin={
+      transformOrigin={transformOrigin}
-        properties.anchorOrigin || { vertical: "bottom", horizontal: "left" }
-      }
-      transformOrigin={
-        properties.transformOrigin || { vertical: "top", horizontal: "left" }
-      }
     >
-      <ColorPickerDialog>
+      <MenuItemWrapper onClick={() => handleColorSelect(defaultColor)}>
-        <HexColorPicker
+        <MenuItemSquare style={{ backgroundColor: defaultColor }} />
-          color={color}
+        <MenuItemText>{title}</MenuItemText>
-          onChange={(newColor): void => {
+      </MenuItemWrapper>
-            setColor(newColor);
-          }}
-        />
-        <HorizontalDivider />
-        <ColorPickerInput>
-          <HexWrapper>
-            <HexLabel>{"Hex"}</HexLabel>
-            <HexColorInputBox>
-              <HashLabel>{"#"}</HashLabel>
-              <HexColorInput
-                color={color}
-                onChange={(newColor): void => {
-                  setColor(newColor);
-                }}
-              />
-            </HexColorInputBox>
-          </HexWrapper>
-          <Swatch $color={color} />
-        </ColorPickerInput>
       <HorizontalDivider />
+      <ColorsWrapper>
         <ColorList>
-          {presetColors.map((presetColor) => (
+          {mainColors.map((presetColor) => (
-            <RecentColorButton
+            <ColorSwatch
               key={presetColor}
               $color={presetColor}
               onClick={(): void => {
-                setColor(presetColor);
+                setSelectedColor(presetColor);
+                handleColorSelect(presetColor);
               }}
             />
           ))}
         </ColorList>
-
+        <ColorGrid>
+          {toneArrays.map((tones) => (
+            <ColorGridCol key={tones.join("-")}>
+              {tones.map((presetColor) => (
+                <ColorSwatch
+                  key={presetColor}
+                  $color={presetColor}
+                  onClick={(): void => {
+                    setSelectedColor(presetColor);
+                    handleColorSelect(presetColor);
+                  }}
+                />
+              ))}
+            </ColorGridCol>
+          ))}
+        </ColorGrid>
+      </ColorsWrapper>
+      <HorizontalDivider />
+      <RecentLabel>{t("color_picker.custom")}</RecentLabel>
+      <RecentColorsList>
         {recentColors.current.length > 0 ? (
           <>
-            <HorizontalDivider />
-            <RecentLabel>{"Recent"}</RecentLabel>
-            <ColorList>
             {recentColors.current.map((recentColor) => (
-                <RecentColorButton
+              <ColorSwatch
                 key={recentColor}
                 $color={recentColor}
                 onClick={(): void => {
-                    setColor(recentColor);
+                  setSelectedColor(recentColor);
+                  handleColorSelect(recentColor);
                 }}
               />
             ))}
-            </ColorList>
           </>
         ) : (
-          <div />
+          <EmptyContainer />
         )}
-        <Buttons>
+        <StyledPlusButton
-          <StyledButton
+          onClick={() => setPickerOpen(true)}
-            onClick={(): void => {
+          title={t("color_picker.add")}
-              closePicker(color);
-            }}
         >
-            <Check
+          <Plus />
-              style={{ width: "16px", height: "16px", marginRight: "8px" }}
+        </StyledPlusButton>
-            />
+      </RecentColorsList>
-            {t("color_picker.apply")}
+    </StyledMenu>
-          </StyledButton>
-        </Buttons>
-      </ColorPickerDialog>
-    </Popover>
   );
 };
 
-const Buttons = styled.div`
+// Styled Components
-  display: flex;
+const StyledMenu = styled(Menu)`
-  justify-content: flex-end;
+  & .MuiPaper-root {
-  margin: 8px;
+    border-radius: 8px;
-`;
+    padding: 4px 0px;
-
+    margin-left: -4px;
-const StyledButton = styled("div")`
+    max-width: 220px;
-  cursor: pointer;
+  }
-  color: #ffffff;
+  & .MuiList-root {
-  background: #f2994a;
+    padding: 0;
-  padding: 0px 10px;
-  height: 36px;
-  line-height: 36px;
-  border-radius: 4px;
-  display: flex;
-  align-items: center;
-  font-family: "Inter";
-  font-size: 14px;
-  &:hover {
-    background: #d68742;
   }
 `;
 
-const RecentLabel = styled.div`
+const MenuItemWrapper = styled(MenuItem)`
-  font-family: "Inter";
+  display: flex;
+  flex-direction: row;
+  justify-content: flex-start;
   font-size: 12px;
-  font-family: Inter;
+  gap: 8px;
-  margin: 8px 8px 0px 8px;
+  width: calc(100% - 8px);
-  color: ${theme.palette.text.secondary};
+  min-width: 172px;
+  margin: 0px 4px 4px 4px;
+  border-radius: 4px;
+  padding: 8px;
+  height: 32px;
+`;
+
+const MenuItemText = styled("div")`
+  color: #000;
+`;
+
+const MenuItemSquare = styled.div`
+  width: 16px;
+  height: 16px;
+  box-sizing: border-box;
+  margin-top: 0px;
+  border: 1px solid ${theme.palette.grey["300"]};
+  border-radius: 4px;
+`;
+
+const ColorsWrapper = styled.div`
+  display: flex;
+  flex-direction: column;
+  margin: 4px;
 `;
 
 const ColorList = styled.div`
   display: flex;
   flex-wrap: wrap;
   flex-direction: row;
-  margin: 8px;
+  margin: 8px 8px 0px 8px;
   justify-content: flex-start;
-  gap: 4.7px;
+  gap: 4px;
 `;
 
-const RecentColorButton = styled.button<{ $color: string }>`
+const ColorGrid = styled.div`
+  display: flex;
+  flex-direction: row;
+  justify-content: flex-start;
+  margin: 8px;
+  gap: 4px;
+`;
+
+const ColorGridCol = styled.div`
+  display: flex;
+  flex-direction: column;
+  justify-content: flex-start;
+  gap: 4px;
+`;
+
+const ColorSwatch = styled.button<{ $color: string }>`
   width: 16px;
   height: 16px;
+  padding: 0px;
   ${({ $color }): string => {
     if ($color.toUpperCase() === "#FFFFFF") {
       return `border: 1px solid ${theme.palette.grey["300"]};`;
@@ -189,7 +280,7 @@ const RecentColorButton = styled.button<{ $color: string }>`
     return `border: 1px solid ${$color};`;
   }}
   background-color: ${({ $color }): string => {
-    return $color;
+    return $color === "transparent" ? "none" : $color;
   }};
   box-sizing: border-box;
   margin-top: 0px;
@@ -207,111 +298,50 @@ const HorizontalDivider = styled.div`
   border-top: 1px solid ${theme.palette.grey["200"]};
 `;
 
-const ColorPickerDialog = styled.div`
+const RecentLabel = styled.div`
-  background: ${theme.palette.background.default};
+  font-family: "Inter";
-  width: ${colorPickerWidth}px;
+  font-size: 12px;
-  padding: 0px;
+  font-family: Inter;
-  display: flex;
+  margin: 8px 12px 0px 12px;
-  flex-direction: column;
+  color: ${theme.palette.text.secondary};
+`;
 
-  & .react-colorful {
+const RecentColorsList = styled.div`
-    height: ${colorfulHeight}px;
+  display: flex;
-    width: ${colorPickerWidth}px;
+  flex-wrap: wrap;
-  }
+  flex-direction: row;
-  & .react-colorful__saturation {
+  padding: 8px;
-    border-bottom: none;
+  margin: 0px 4px;
-    border-radius: 0px;
+  justify-content: flex-start;
-  }
+  gap: 4px;
-  & .react-colorful__hue {
+`;
-    height: 8px;
+
-    margin: 8px;
+const StyledPlusButton = styled("button")`
-    border-radius: 5px;
+  display: flex;
-  }
+  justify-content: center;
-  & .react-colorful__saturation-pointer {
+  flex-wrap: wrap;
-    width: 14px;
+  align-items: center;
-    height: 14px;
+  border: none;
-  }
+  background: none;
-  & .react-colorful__hue-pointer {
+  font-size: 12px;
-    width: 7px;
-    border-radius: 8px;
   height: 16px;
   width: 16px;
-    border-bottom: 1px solid #eee;
+  margin: 0;
+  padding: 0;
+  border-radius: 4px;
+  svg {
+    width: 16px;
+    height: 16px;
   }
-`;
-
-const HashLabel = styled.div`
-  margin: auto 0px auto 10px;
-  font-size: 13px;
-  color: #333;
-  font-family: ${theme.typography.button.fontFamily};
-`;
-
-const HexLabel = styled.div`
-  margin: auto 0px;
-  font-size: 12px;
-  display: inline-flex;
-  font-family: ${theme.typography.button.fontFamily};
-`;
-
-const HexColorInputBox = styled.div`
-  display: inline-flex;
-  flex-grow: 1;
-  width: 140px;
-  height: 28px;
-  border: 1px solid ${theme.palette.grey["300"]};
-  border-radius: 5px;
   &:hover {
-    border: 1px solid ${theme.palette.grey["600"]};
+    cursor: pointer;
-  }
+    outline: 1px solid ${theme.palette.grey["300"]};
-  &:focus-within {
-    outline: 2px solid ${theme.palette.secondary.main};
     outline-offset: 1px;
   }
 `;
 
-const HexWrapper = styled.div`
+const EmptyContainer = styled.div`
-  display: flex;
+  display: none;
-  gap: 8px;
-  flex-grow: 1;
-  & input {
-    min-width: 0px;
-    border: 0px;
-    background: ${theme.palette.background.default};
-    outline: none;
-    font-family: ${theme.typography.button.fontFamily};
-    font-size: 12px;
-    text-transform: uppercase;
-    text-align: right;
-    padding-right: 10px;
-    border-radius: 5px;
-  }
-
-  & input:focus {
-    border-color: #4298ef;
-  }
-`;
-
-const Swatch = styled.div<{ $color: string }>`
-  display: inline-flex;
-  ${({ $color }): string => {
-    if ($color.toUpperCase() === "#FFFFFF") {
-      return `border: 1px solid ${theme.palette.grey["300"]};`;
-    }
-    return `border: 1px solid ${$color};`;
-  }}
-  background-color: ${({ $color }): string => $color};
-  width: 28px;
-  height: 28px;
-  border-radius: 5px;
-`;
-
-const ColorPickerInput = styled.div`
-  display: flex;
-  flex-direction: row;
-  align-items: center;
-  margin: 8px;
-  gap: 8px;
 `;
 
 export default ColorPicker;

webapp/IronCalc/src/components/Editor/Editor.tsx

@@ -114,7 +114,7 @@ const Editor = (options: EditorOptions) => {
       }
     }
     if (type === cell.focus) {
-      textareaRef.current?.focus();
+      textareaRef.current?.focus({ preventScroll: true });
     }
   });
 

webapp/IronCalc/src/components/SheetTabBar/SheetTab.tsx

@@ -2,6 +2,7 @@ import { Button, Menu, MenuItem, styled } from "@mui/material";
 import type { MenuItemProps } from "@mui/material";
 import { ChevronDown } from "lucide-react";
 import { useRef, useState } from "react";
+import { useTranslation } from "react-i18next";
 import { theme } from "../../theme";
 import ColorPicker from "../ColorPicker/ColorPicker";
 import { isInReferenceMode } from "../Editor/util";
@@ -28,6 +29,7 @@ function SheetTab(props: SheetTabProps) {
   const [colorPickerOpen, setColorPickerOpen] = useState(false);
   const colorButton = useRef<HTMLDivElement>(null);
   const open = Boolean(anchorEl);
+  const { t } = useTranslation();
   const handleOpen = (event: React.MouseEvent<HTMLButtonElement>) => {
     setAnchorEl(event.currentTarget);
   };
@@ -136,6 +138,8 @@ function SheetTab(props: SheetTabProps) {
       />
       <ColorPicker
         color={color}
+        defaultColor="#FFFFFF"
+        title={t("color_picker.no_fill")}
         onChange={(color): void => {
           props.onColorChanged(color);
           setColorPickerOpen(false);
@@ -145,6 +149,8 @@ function SheetTab(props: SheetTabProps) {
         }}
         anchorEl={colorButton}
         open={colorPickerOpen}
+        anchorOrigin={{ vertical: "bottom", horizontal: "right" }}
+        transformOrigin={{ vertical: "bottom", horizontal: "left" }}
       />
       <SheetDeleteDialog
         open={deleteDialogOpen}

webapp/IronCalc/src/components/Toolbar/Toolbar.tsx

@@ -410,10 +410,10 @@ function Toolbar(properties: ToolbarProperties) {
       <StyledButton
         type="button"
         $pressed={false}
-        disabled={!canEdit}
         onClick={() => {
           properties.onClearFormatting();
         }}
+        disabled={!canEdit}
         title={t("toolbar.clear_formatting")}
       >
         <RemoveFormatting />
@@ -421,10 +421,10 @@ function Toolbar(properties: ToolbarProperties) {
       <StyledButton
         type="button"
         $pressed={false}
-        disabled={!canEdit}
         onClick={() => {
           properties.onDownloadPNG();
         }}
+        disabled={!canEdit}
         title={t("toolbar.selected_png")}
       >
         <ImageDown />
@@ -432,6 +432,8 @@ function Toolbar(properties: ToolbarProperties) {
 
       <ColorPicker
         color={properties.fontColor}
+        defaultColor="#000000"
+        title={t("color_picker.default")}
         onChange={(color): void => {
           properties.onTextColorPicked(color);
           setFontColorPickerOpen(false);
@@ -441,11 +443,17 @@ function Toolbar(properties: ToolbarProperties) {
         }}
         anchorEl={fontColorButton}
         open={fontColorPickerOpen}
+        anchorOrigin={{ vertical: "bottom", horizontal: "left" }}
+        transformOrigin={{ vertical: "top", horizontal: "left" }}
       />
       <ColorPicker
         color={properties.fillColor}
+        defaultColor="#FFFFFF"
+        title={t("color_picker.default")}
         onChange={(color): void => {
+          if (color !== null) {
             properties.onFillColorPicked(color);
+          }
           setFillColorPickerOpen(false);
         }}
         onClose={() => {
@@ -453,6 +461,8 @@ function Toolbar(properties: ToolbarProperties) {
         }}
         anchorEl={fillColorButton}
         open={fillColorPickerOpen}
+        anchorOrigin={{ vertical: "bottom", horizontal: "left" }}
+        transformOrigin={{ vertical: "top", horizontal: "left" }}
       />
       <BorderPicker
         onChange={(border): void => {

webapp/IronCalc/src/components/Workbook/Workbook.tsx

@@ -48,7 +48,7 @@ const Workbook = (props: { model: Model; workbookState: WorkbookState }) => {
   );
   const focusWorkbook = useCallback(() => {
     if (rootRef.current) {
-      rootRef.current.focus();
+      rootRef.current.focus({ preventScroll: true });
       // HACK: We need to select something inside the root for onCopy to work
       const selection = window.getSelection();
       if (selection) {
@@ -567,19 +567,15 @@ const Workbook = (props: { model: Model; workbookState: WorkbookState }) => {
           const {
             range: [rowStart, columnStart, rowEnd, columnEnd],
           } = model.getSelectedView();
-          const { topLeftCell, bottomRightCell } =
+          // NB: cells outside of the displayed area are not rendered
-            worksheetCanvas.getVisibleCells();
+          // I think the only reasonable way to do this would be server side.
-          const firstRow = Math.max(rowStart, topLeftCell.row);
-          const firstColumn = Math.max(columnStart, topLeftCell.column);
-          const lastRow = Math.min(rowEnd, bottomRightCell.row);
-          const lastColumn = Math.min(columnEnd, bottomRightCell.column);
           let [x, y] = worksheetCanvas.getCoordinatesByCell(
-            firstRow,
+            rowStart,
-            firstColumn,
+            columnStart,
           );
           const [x1, y1] = worksheetCanvas.getCoordinatesByCell(
-            lastRow + 1,
+            rowEnd + 1,
-            lastColumn + 1,
+            columnEnd + 1,
           );
           const width = (x1 - x) * devicePixelRatio;
           const height = (y1 - y) * devicePixelRatio;

webapp/IronCalc/src/components/Worksheet/Worksheet.tsx

@@ -24,7 +24,7 @@ import {
   TOOLBAR_HEIGHT,
 } from "../constants";
 import type { Cell } from "../types";
-import { AreaType, type WorkbookState } from "../workbookState";
+import type { WorkbookState } from "../workbookState";
 import CellContextMenu from "./CellContextMenu";
 import usePointer from "./usePointer";
 
@@ -59,7 +59,6 @@ const Worksheet = forwardRef(
     const spacerElement = useRef<HTMLDivElement>(null);
     const cellOutline = useRef<HTMLDivElement>(null);
     const areaOutline = useRef<HTMLDivElement>(null);
-    const cellOutlineHandle = useRef<HTMLDivElement>(null);
     const extendToOutline = useRef<HTMLDivElement>(null);
     const columnResizeGuide = useRef<HTMLDivElement>(null);
     const rowResizeGuide = useRef<HTMLDivElement>(null);
@@ -85,7 +84,6 @@ const Worksheet = forwardRef(
       const worksheetRef = worksheetElement.current;
 
       const outline = cellOutline.current;
-      const handle = cellOutlineHandle.current;
       const area = areaOutline.current;
       const extendTo = extendToOutline.current;
       const editor = editorElement.current;
@@ -97,7 +95,6 @@ const Worksheet = forwardRef(
         !columnHeadersRef ||
         !worksheetRef ||
         !outline ||
-        !handle ||
         !area ||
         !extendTo ||
         !scrollElement.current ||
@@ -118,7 +115,6 @@ const Worksheet = forwardRef(
           rowGuide: rowGuideRef,
           columnHeaders: columnHeadersRef,
           cellOutline: outline,
-          cellOutlineHandle: handle,
           areaOutline: area,
           extendToOutline: extendTo,
           editor: editor,
@@ -191,8 +187,7 @@ const Worksheet = forwardRef(
       worksheetCanvas.current = canvas;
     });
 
-    const { onPointerMove, onPointerDown, onPointerHandleDown, onPointerUp } =
+    const { onPointerMove, onPointerDown, onPointerUp } = usePointer({
-      usePointer({
       model,
       workbookState,
       refresh,
@@ -256,134 +251,6 @@ const Worksheet = forwardRef(
         }
         refresh();
       },
-        onExtendToCell: (cell) => {
-          const canvas = worksheetCanvas.current;
-          if (!canvas) {
-            return;
-          }
-          const { row, column } = cell;
-          const {
-            range: [rowStart, columnStart, rowEnd, columnEnd],
-          } = model.getSelectedView();
-          // We are either extending by rows or by columns
-          // And we could be doing it in the positive direction (downwards or right)
-          // or the negative direction (upwards or left)
-
-          if (
-            row > rowEnd &&
-            ((column <= columnEnd && column >= columnStart) ||
-              (column < columnStart && columnStart - column < row - rowEnd) ||
-              (column > columnEnd && column - columnEnd < row - rowEnd))
-          ) {
-            // rows downwards
-            const area = {
-              type: AreaType.rowsDown,
-              rowStart: rowEnd + 1,
-              rowEnd: row,
-              columnStart,
-              columnEnd,
-            };
-            workbookState.setExtendToArea(area);
-            canvas.renderSheet();
-          } else if (
-            row < rowStart &&
-            ((column <= columnEnd && column >= columnStart) ||
-              (column < columnStart && columnStart - column < rowStart - row) ||
-              (column > columnEnd && column - columnEnd < rowStart - row))
-          ) {
-            // rows upwards
-            const area = {
-              type: AreaType.rowsUp,
-              rowStart: row,
-              rowEnd: rowStart,
-              columnStart,
-              columnEnd,
-            };
-            workbookState.setExtendToArea(area);
-            canvas.renderSheet();
-          } else if (
-            column > columnEnd &&
-            ((row <= rowEnd && row >= rowStart) ||
-              (row < rowStart && rowStart - row < column - columnEnd) ||
-              (row > rowEnd && row - rowEnd < column - columnEnd))
-          ) {
-            // columns right
-            const area = {
-              type: AreaType.columnsRight,
-              rowStart,
-              rowEnd,
-              columnStart: columnEnd + 1,
-              columnEnd: column,
-            };
-            workbookState.setExtendToArea(area);
-            canvas.renderSheet();
-          } else if (
-            column < columnStart &&
-            ((row <= rowEnd && row >= rowStart) ||
-              (row < rowStart && rowStart - row < columnStart - column) ||
-              (row > rowEnd && row - rowEnd < columnStart - column))
-          ) {
-            // columns left
-            const area = {
-              type: AreaType.columnsLeft,
-              rowStart,
-              rowEnd,
-              columnStart: column,
-              columnEnd: columnStart,
-            };
-            workbookState.setExtendToArea(area);
-            canvas.renderSheet();
-          }
-        },
-        onExtendToEnd: () => {
-          const canvas = worksheetCanvas.current;
-          if (!canvas) {
-            return;
-          }
-          const { sheet, range } = model.getSelectedView();
-          const extendedArea = workbookState.getExtendToArea();
-          if (!extendedArea) {
-            return;
-          }
-          const rowStart = Math.min(range[0], range[2]);
-          const height = Math.abs(range[2] - range[0]) + 1;
-          const width = Math.abs(range[3] - range[1]) + 1;
-          const columnStart = Math.min(range[1], range[3]);
-
-          const area = {
-            sheet,
-            row: rowStart,
-            column: columnStart,
-            width,
-            height,
-          };
-
-          switch (extendedArea.type) {
-            case AreaType.rowsDown:
-              model.autoFillRows(area, extendedArea.rowEnd);
-              break;
-            case AreaType.rowsUp: {
-              model.autoFillRows(area, extendedArea.rowStart);
-              break;
-            }
-            case AreaType.columnsRight: {
-              model.autoFillColumns(area, extendedArea.columnEnd);
-              break;
-            }
-            case AreaType.columnsLeft: {
-              model.autoFillColumns(area, extendedArea.columnStart);
-              break;
-            }
-          }
-          model.setSelectedRange(
-            Math.min(rowStart, extendedArea.rowStart),
-            Math.min(columnStart, extendedArea.columnStart),
-            Math.max(rowStart + height - 1, extendedArea.rowEnd),
-            Math.max(columnStart + width - 1, extendedArea.columnEnd),
-          );
-          workbookState.clearExtendToArea();
-          canvas.renderSheet();
-        },
       canvasElement,
       worksheetElement,
       worksheetCanvas,
@@ -463,10 +330,6 @@ const Worksheet = forwardRef(
           </EditorWrapper>
           <AreaOutline ref={areaOutline} />
           <ExtendToOutline ref={extendToOutline} />
-          <CellOutlineHandle
-            ref={cellOutlineHandle}
-            onPointerDown={onPointerHandleDown}
-          />
           <ColumnResizeGuide ref={columnResizeGuide} />
           <RowResizeGuide ref={rowResizeGuide} />
           <ColumnHeaders ref={columnHeaders} />
@@ -640,15 +503,6 @@ const CellOutline = styled("div")`
   display: flex;
 `;
 
-const CellOutlineHandle = styled("div")`
-  position: absolute;
-  width: 5px;
-  height: 5px;
-  background: ${outlineColor};
-  cursor: crosshair;
-  border-radius: 1px;
-`;
-
 const ExtendToOutline = styled("div")`
   position: absolute;
   border: 1px dashed ${outlineColor};

webapp/IronCalc/src/components/Worksheet/usePointer.ts

@@ -20,8 +20,6 @@ interface PointerSettings {
   onAllSheetSelected: () => void;
   onAreaSelecting: (cell: Cell) => void;
   onAreaSelected: () => void;
-  onExtendToCell: (cell: Cell) => void;
-  onExtendToEnd: () => void;
   model: Model;
   workbookState: WorkbookState;
   refresh: () => void;
@@ -31,12 +29,10 @@ interface PointerEvents {
   onPointerDown: (event: PointerEvent) => void;
   onPointerMove: (event: PointerEvent) => void;
   onPointerUp: (event: PointerEvent) => void;
-  onPointerHandleDown: (event: PointerEvent) => void;
 }
 
 const usePointer = (options: PointerSettings): PointerEvents => {
   const isSelecting = useRef(false);
-  const isExtending = useRef(false);
   const isInsertingRef = useRef(false);
 
   const onPointerMove = useCallback(
@@ -47,9 +43,7 @@ const usePointer = (options: PointerSettings): PointerEvents => {
         return;
       }
 
-      if (
+      if (!(isSelecting.current || isInsertingRef.current)) {
-        !(isSelecting.current || isExtending.current || isInsertingRef.current)
-      ) {
         return;
       }
       const { canvasElement, model, worksheetCanvas } = options;
@@ -70,8 +64,6 @@ const usePointer = (options: PointerSettings): PointerEvents => {
 
       if (isSelecting.current) {
         options.onAreaSelecting(cell);
-      } else if (isExtending.current) {
-        options.onExtendToCell(cell);
       } else if (isInsertingRef.current) {
         const { refresh, workbookState } = options;
         const editingCell = workbookState.getEditingCell();
@@ -103,11 +95,6 @@ const usePointer = (options: PointerSettings): PointerEvents => {
         isSelecting.current = false;
         worksheetElement.current?.releasePointerCapture(event.pointerId);
         options.onAreaSelected();
-      } else if (isExtending.current) {
-        const { worksheetElement } = options;
-        isExtending.current = false;
-        worksheetElement.current?.releasePointerCapture(event.pointerId);
-        options.onExtendToEnd();
       } else if (isInsertingRef.current) {
         const { worksheetElement } = options;
         isInsertingRef.current = false;
@@ -120,10 +107,14 @@ const usePointer = (options: PointerSettings): PointerEvents => {
   const onPointerDown = useCallback(
     (event: PointerEvent) => {
       const target = event.target as HTMLElement;
-      if (target !== null && target.className === "column-resize-handle") {
+      if (target.className === "column-resize-handle") {
         // we are resizing a column
         return;
       }
+      if (target.className.includes("ironcalc-cell-handle")) {
+        // we are extending values
+        return;
+      }
       let x = event.clientX;
       let y = event.clientY;
       const {
@@ -236,25 +227,17 @@ const usePointer = (options: PointerSettings): PointerEvents => {
           );
           // we continue to select the new cell
         }
+        if (event.shiftKey) {
+          // We are extending the selection
+          options.onAreaSelecting(cell);
+          options.onAreaSelected();
+        } else {
+          // We are selecting a single cell
           options.onCellSelected(cell, event);
           isSelecting.current = true;
           worksheetWrapper.setPointerCapture(event.pointerId);
         }
-    },
-    [options],
-  );
-
-  const onPointerHandleDown = useCallback(
-    (event: PointerEvent) => {
-      const worksheetWrapper = options.worksheetElement.current;
-      // Silence the linter
-      if (!worksheetWrapper) {
-        return;
       }
-      isExtending.current = true;
-      worksheetWrapper.setPointerCapture(event.pointerId);
-      event.stopPropagation();
-      event.preventDefault();
     },
     [options],
   );
@@ -263,7 +246,6 @@ const usePointer = (options: PointerSettings): PointerEvents => {
     onPointerDown,
     onPointerMove,
     onPointerUp,
-    onPointerHandleDown,
   };
 };
 

webapp/IronCalc/src/components/WorksheetCanvas/outlineHandle.ts

@@ -0,0 +1,211 @@
+import { AreaType } from "../workbookState";
+import { LAST_COLUMN, LAST_ROW, outlineColor } from "./constants";
+import type WorksheetCanvas from "./worksheetCanvas";
+
+export function attachOutlineHandle(
+  worksheet: WorksheetCanvas,
+): HTMLDivElement {
+  // There is *always* a parent
+  const parent = worksheet.canvas.parentElement as HTMLDivElement;
+
+  // Remove any existing cell outline handles
+  for (const handle of parent.querySelectorAll(".ironcalc-cell-handle")) {
+    handle.remove();
+  }
+
+  // Create a new cell outline handle
+  const cellOutlineHandle = document.createElement("div");
+  cellOutlineHandle.className = "ironcalc-cell-handle";
+  parent.appendChild(cellOutlineHandle);
+  worksheet.cellOutlineHandle = cellOutlineHandle;
+
+  Object.assign(cellOutlineHandle.style, {
+    position: "absolute",
+    width: "5px",
+    height: "5px",
+    background: outlineColor,
+    cursor: "crosshair",
+    borderRadius: "1px",
+  });
+
+  // cell handle events
+  const resizeHandleMove = (event: MouseEvent): void => {
+    const canvasRect = worksheet.canvas.getBoundingClientRect();
+    const x = event.clientX - canvasRect.x;
+    const y = event.clientY - canvasRect.y;
+
+    const cell = worksheet.getCellByCoordinates(x, y);
+    if (!cell) {
+      return;
+    }
+    const { row, column } = cell;
+    const {
+      range: [rowStart, columnStart, rowEnd, columnEnd],
+    } = worksheet.model.getSelectedView();
+    // We are either extending by rows or by columns
+    // And we could be doing it in the positive direction (downwards or right)
+    // or the negative direction (upwards or left)
+
+    if (
+      row > rowEnd &&
+      ((column <= columnEnd && column >= columnStart) ||
+        (column < columnStart && columnStart - column < row - rowEnd) ||
+        (column > columnEnd && column - columnEnd < row - rowEnd))
+    ) {
+      // rows downwards
+      const area = {
+        type: AreaType.rowsDown,
+        rowStart: rowEnd + 1,
+        rowEnd: row,
+        columnStart,
+        columnEnd,
+      };
+      worksheet.workbookState.setExtendToArea(area);
+      worksheet.renderSheet();
+    } else if (
+      row < rowStart &&
+      ((column <= columnEnd && column >= columnStart) ||
+        (column < columnStart && columnStart - column < rowStart - row) ||
+        (column > columnEnd && column - columnEnd < rowStart - row))
+    ) {
+      // rows upwards
+      const area = {
+        type: AreaType.rowsUp,
+        rowStart: row,
+        rowEnd: rowStart,
+        columnStart,
+        columnEnd,
+      };
+      worksheet.workbookState.setExtendToArea(area);
+      worksheet.renderSheet();
+    } else if (
+      column > columnEnd &&
+      ((row <= rowEnd && row >= rowStart) ||
+        (row < rowStart && rowStart - row < column - columnEnd) ||
+        (row > rowEnd && row - rowEnd < column - columnEnd))
+    ) {
+      // columns right
+      const area = {
+        type: AreaType.columnsRight,
+        rowStart,
+        rowEnd,
+        columnStart: columnEnd + 1,
+        columnEnd: column,
+      };
+      worksheet.workbookState.setExtendToArea(area);
+      worksheet.renderSheet();
+    } else if (
+      column < columnStart &&
+      ((row <= rowEnd && row >= rowStart) ||
+        (row < rowStart && rowStart - row < columnStart - column) ||
+        (row > rowEnd && row - rowEnd < columnStart - column))
+    ) {
+      // columns left
+      const area = {
+        type: AreaType.columnsLeft,
+        rowStart,
+        rowEnd,
+        columnStart: column,
+        columnEnd: columnStart,
+      };
+      worksheet.workbookState.setExtendToArea(area);
+      worksheet.renderSheet();
+    }
+  };
+
+  const resizeHandleUp = (_event: MouseEvent): void => {
+    document.removeEventListener("pointermove", resizeHandleMove);
+    document.removeEventListener("pointerup", resizeHandleUp);
+
+    const { sheet, range } = worksheet.model.getSelectedView();
+    const extendedArea = worksheet.workbookState.getExtendToArea();
+    if (!extendedArea) {
+      return;
+    }
+    const rowStart = Math.min(range[0], range[2]);
+    const height = Math.abs(range[2] - range[0]) + 1;
+    const width = Math.abs(range[3] - range[1]) + 1;
+    const columnStart = Math.min(range[1], range[3]);
+
+    const area = {
+      sheet,
+      row: rowStart,
+      column: columnStart,
+      width,
+      height,
+    };
+
+    switch (extendedArea.type) {
+      case AreaType.rowsDown:
+        worksheet.model.autoFillRows(area, extendedArea.rowEnd);
+        break;
+      case AreaType.rowsUp: {
+        worksheet.model.autoFillRows(area, extendedArea.rowStart);
+        break;
+      }
+      case AreaType.columnsRight: {
+        worksheet.model.autoFillColumns(area, extendedArea.columnEnd);
+        break;
+      }
+      case AreaType.columnsLeft: {
+        worksheet.model.autoFillColumns(area, extendedArea.columnStart);
+        break;
+      }
+    }
+    worksheet.model.setSelectedRange(
+      Math.min(rowStart, extendedArea.rowStart),
+      Math.min(columnStart, extendedArea.columnStart),
+      Math.max(rowStart + height - 1, extendedArea.rowEnd),
+      Math.max(columnStart + width - 1, extendedArea.columnEnd),
+    );
+    worksheet.workbookState.clearExtendToArea();
+    worksheet.renderSheet();
+  };
+
+  cellOutlineHandle.addEventListener("pointerdown", () => {
+    document.addEventListener("pointermove", resizeHandleMove);
+    document.addEventListener("pointerup", resizeHandleUp);
+  });
+
+  cellOutlineHandle.addEventListener("dblclick", (event) => {
+    // On double-click, we will auto-fill the rows below the selected cell
+    const [sheet, row, column] = worksheet.model.getSelectedCell();
+    let lastUsedRow = row + 1;
+    let testColumn = column - 1;
+
+    // The "test column" is the column to the left of the selected cell or the next column if the left one is empty
+    if (
+      testColumn < 1 ||
+      worksheet.model.getFormattedCellValue(sheet, row, column - 1) === ""
+    ) {
+      testColumn = column + 1;
+      if (
+        testColumn > LAST_COLUMN ||
+        worksheet.model.getFormattedCellValue(sheet, row, testColumn) === ""
+      ) {
+        return;
+      }
+    }
+
+    // Find the last used row in the "test column"
+    for (let r = row + 1; r <= LAST_ROW; r += 1) {
+      if (worksheet.model.getFormattedCellValue(sheet, r, testColumn) === "") {
+        break;
+      }
+      lastUsedRow = r;
+    }
+
+    const area = {
+      sheet,
+      row: row,
+      column: column,
+      width: 1,
+      height: 1,
+    };
+
+    worksheet.model.autoFillRows(area, lastUsedRow);
+    event.stopPropagation();
+    worksheet.renderSheet();
+  });
+  return cellOutlineHandle;
+}

webapp/IronCalc/src/components/WorksheetCanvas/util.ts

@@ -0,0 +1,63 @@
+// Get a 10% transparency of an hex color
+export function hexToRGBA10Percent(colorHex: string): string {
+  // Remove the leading hash (#) if present
+  const hex = colorHex.replace(/^#/, "");
+
+  // Parse the hex color
+  const red = Number.parseInt(hex.substring(0, 2), 16);
+  const green = Number.parseInt(hex.substring(2, 4), 16);
+  const blue = Number.parseInt(hex.substring(4, 6), 16);
+
+  // Set the alpha (opacity) to 0.1 (10%)
+  const alpha = 0.1;
+
+  // Return the RGBA color string
+  return `rgba(${red}, ${green}, ${blue}, ${alpha})`;
+}
+
+/**
+ * Splits the given text into multiple lines. If `wrapText` is true, it applies word-wrapping
+ * based on the specified canvas context, maximum width, and horizontal padding.
+ *
+ * - First, the text is split by newline characters so that explicit newlines are respected.
+ * - If wrapping is enabled, each line is further split into words and measured against the
+ *   available width. Whenever adding an extra word would exceed
+ *   this limit, a new line is started.
+ *
+ * @param text     The text to split into lines.
+ * @param wrapText Whether to apply word-wrapping or just return text split by newlines.
+ * @param context  The `CanvasRenderingContext2D` used for measuring text width.
+ * @param width    The maximum width for each line.
+ * @returns        An array of lines (strings), each fitting within the specified width if wrapping is enabled.
+ */
+export function computeWrappedLines(
+  text: string,
+  wrapText: boolean,
+  context: CanvasRenderingContext2D,
+  width: number,
+): string[] {
+  // Split the text into lines
+  const rawLines = text.split("\n");
+  if (!wrapText) {
+    // If there is no wrapping, return the raw lines
+    return rawLines;
+  }
+  const wrappedLines = [];
+  for (const line of rawLines) {
+    const words = line.split(" ");
+    let currentLine = words[0];
+    for (let i = 1; i < words.length; i += 1) {
+      const word = words[i];
+      const testLine = `${currentLine} ${word}`;
+      const textWidth = context.measureText(testLine).width;
+      if (textWidth < width) {
+        currentLine = testLine;
+      } else {
+        wrappedLines.push(currentLine);
+        currentLine = word;
+      }
+    }
+    wrappedLines.push(currentLine);
+  }
+  return wrappedLines;
+}

webapp/IronCalc/src/components/WorksheetCanvas/worksheetCanvas.ts

@@ -18,6 +18,8 @@ import {
   headerTextColor,
   outlineColor,
 } from "./constants";
+import { attachOutlineHandle } from "./outlineHandle";
+import { computeWrappedLines, hexToRGBA10Percent } from "./util";
 
 export interface CanvasSettings {
   model: Model;
@@ -28,7 +30,6 @@ export interface CanvasSettings {
     canvas: HTMLCanvasElement;
     cellOutline: HTMLDivElement;
     areaOutline: HTMLDivElement;
-    cellOutlineHandle: HTMLDivElement;
     extendToOutline: HTMLDivElement;
     columnGuide: HTMLDivElement;
     rowGuide: HTMLDivElement;
@@ -53,69 +54,6 @@ export const defaultCellFontFamily = fonts.regular;
 export const headerFontFamily = fonts.regular;
 export const frozenSeparatorWidth = 3;
 
-// Get a 10% transparency of an hex color
-function hexToRGBA10Percent(colorHex: string): string {
-  // Remove the leading hash (#) if present
-  const hex = colorHex.replace(/^#/, "");
-
-  // Parse the hex color
-  const red = Number.parseInt(hex.substring(0, 2), 16);
-  const green = Number.parseInt(hex.substring(2, 4), 16);
-  const blue = Number.parseInt(hex.substring(4, 6), 16);
-
-  // Set the alpha (opacity) to 0.1 (10%)
-  const alpha = 0.1;
-
-  // Return the RGBA color string
-  return `rgba(${red}, ${green}, ${blue}, ${alpha})`;
-}
-
-/**
- * Splits the given text into multiple lines. If `wrapText` is true, it applies word-wrapping
- * based on the specified canvas context, maximum width, and horizontal padding.
- *
- * - First, the text is split by newline characters so that explicit newlines are respected.
- * - If wrapping is enabled, each line is further split into words and measured against the
- *   available width. Whenever adding an extra word would exceed
- *   this limit, a new line is started.
- *
- * @param text     The text to split into lines.
- * @param wrapText Whether to apply word-wrapping or just return text split by newlines.
- * @param context  The `CanvasRenderingContext2D` used for measuring text width.
- * @param width    The maximum width for each line.
- * @returns        An array of lines (strings), each fitting within the specified width if wrapping is enabled.
- */
-function computeWrappedLines(
-  text: string,
-  wrapText: boolean,
-  context: CanvasRenderingContext2D,
-  width: number,
-): string[] {
-  // Split the text into lines
-  const rawLines = text.split("\n");
-  if (!wrapText) {
-    // If there is no wrapping, return the raw lines
-    return rawLines;
-  }
-  const wrappedLines = [];
-  for (const line of rawLines) {
-    const words = line.split(" ");
-    let currentLine = words[0];
-    for (const word of words) {
-      const testLine = `${currentLine} ${word}`;
-      const textWidth = context.measureText(testLine).width;
-      if (textWidth < width) {
-        currentLine = testLine;
-      } else {
-        wrappedLines.push(currentLine);
-        currentLine = word;
-      }
-    }
-    wrappedLines.push(currentLine);
-  }
-  return wrappedLines;
-}
-
 export default class WorksheetCanvas {
   sheetWidth: number;
 
@@ -168,7 +106,6 @@ export default class WorksheetCanvas {
     this.refresh = options.refresh;
 
     this.cellOutline = options.elements.cellOutline;
-    this.cellOutlineHandle = options.elements.cellOutlineHandle;
     this.areaOutline = options.elements.areaOutline;
     this.extendToOutline = options.elements.extendToOutline;
     this.rowGuide = options.elements.rowGuide;
@@ -178,6 +115,7 @@ export default class WorksheetCanvas {
     this.onColumnWidthChanges = options.onColumnWidthChanges;
     this.onRowHeightChanges = options.onRowHeightChanges;
     this.resetHeaders();
+    this.cellOutlineHandle = attachOutlineHandle(this);
   }
 
   setScrollPosition(scrollPosition: { left: number; top: number }): void {

webapp/IronCalc/src/locale/en_us.json

@@ -121,6 +121,11 @@
     "insert_column": "Insert column"
   },
   "color_picker": {
-    "apply": "Apply"
+    "apply": "Add color",
+    "cancel": "Cancel",
+    "add": "Add new color",
+    "default": "Default color",
+    "no_fill": "No fill",
+    "custom": "Custom"
   }
 }

webapp/app.ironcalc.com/frontend/package.json

@@ -14,19 +14,19 @@
     "@emotion/react": "^11.14.0",
     "@emotion/styled": "^11.14.0",
     "@ironcalc/workbook": "file:../../IronCalc/",
-    "@mui/material": "^6.4",
+    "@mui/material": "^7.1.1",
-    "lucide-react": "^0.473.0",
+    "lucide-react": "^0.513.0",
     "qrcode.react": "^4.2.0",
-    "react": "^19.0.0",
+    "react": "^19.1.0",
-    "react-dom": "^19.0.0"
+    "react-dom": "^19.1.0"
   },
   "devDependencies": {
     "@biomejs/biome": "1.9.4",
-    "@types/react": "^19.0.0",
+    "@types/react": "^19.1.0",
-    "@types/react-dom": "^19.0.0",
+    "@types/react-dom": "^19.1.0",
     "@vitejs/plugin-react": "^4.3.4",
-    "typescript": "~5.6.2",
+    "typescript": "~5.8.3",
-    "vite": "^6.0.5",
+    "vite": "^6.3.5",
     "vite-plugin-svgr": "^4.2.0"
   }
 }

webapp/app.ironcalc.com/frontend/src/App.tsx

@@ -1,7 +1,8 @@
 import "./App.css";
 import styled from "@emotion/styled";
-import { useEffect, useState } from "react";
+import { useCallback, useEffect, useState } from "react";
 import { FileBar } from "./components/FileBar";
+import LeftDrawer from "./components/LeftDrawer/LeftDrawer";
 import {
   get_documentation_model,
   get_model,
@@ -10,6 +11,8 @@ import {
 import {
   createNewModel,
   deleteSelectedModel,
+  getModelsMetadata,
+  getSelectedUuid,
   loadModelFromStorageOrCreate,
   saveModelToStorage,
   saveSelectedModelInStorage,
@@ -21,6 +24,14 @@ import { IronCalc, IronCalcIcon, Model, init } from "@ironcalc/workbook";
 
 function App() {
   const [model, setModel] = useState<Model | null>(null);
+  const [isDrawerOpen, setIsDrawerOpen] = useState(false);
+  const [modelsMetadata, setModelsMetadata] = useState(getModelsMetadata());
+  const [selectedUuid, setSelectedUuid] = useState(getSelectedUuid());
+
+  const refreshModelsData = useCallback(() => {
+    setModelsMetadata(getModelsMetadata());
+    setSelectedUuid(getSelectedUuid());
+  }, []);
 
   useEffect(() => {
     async function start() {
@@ -38,6 +49,7 @@ function App() {
           const importedModel = Model.from_bytes(model_bytes);
           localStorage.removeItem("selected");
           setModel(importedModel);
+          refreshModelsData();
         } catch (e) {
           alert("Model not found, or failed to load");
         }
@@ -47,6 +59,7 @@ function App() {
           const importedModel = Model.from_bytes(model_bytes);
           localStorage.removeItem("selected");
           setModel(importedModel);
+          refreshModelsData();
         } catch (e) {
           alert("Example file not found, or failed to load");
         }
@@ -54,10 +67,11 @@ function App() {
         // try to load from local storage
         const newModel = loadModelFromStorageOrCreate();
         setModel(newModel);
+        refreshModelsData();
       }
     }
     start();
-  }, []);
+  }, [refreshModelsData]);
 
   if (!model) {
     return (
@@ -79,48 +93,80 @@ function App() {
   // We could use context for model, but the problem is that it should initialized to null.
   // Passing the property down makes sure it is always defined.
 
+  // Handlers for model changes that also update our models state
+  const handleNewModel = () => {
+    const newModel = createNewModel();
+    setModel(newModel);
+    refreshModelsData();
+  };
+
+  const handleSetModel = (uuid: string) => {
+    const newModel = selectModelFromStorage(uuid);
+    if (newModel) {
+      setModel(newModel);
+      refreshModelsData();
+    }
+  };
+
+  const handleDeleteModel = () => {
+    const newModel = deleteSelectedModel();
+    if (newModel) {
+      setModel(newModel);
+      refreshModelsData();
+    }
+  };
+
   return (
-    <Wrapper>
+    <AppContainer>
+      <LeftDrawer
+        open={isDrawerOpen}
+        onClose={() => setIsDrawerOpen(false)}
+        newModel={handleNewModel}
+        setModel={handleSetModel}
+        models={modelsMetadata}
+        selectedUuid={selectedUuid}
+        setDeleteDialogOpen={() => {}}
+      />
+
+      <MainContent isDrawerOpen={isDrawerOpen}>
         <FileBar
           model={model}
           onModelUpload={async (arrayBuffer: ArrayBuffer, fileName: string) => {
             const blob = await uploadFile(arrayBuffer, fileName);
-
             const bytes = new Uint8Array(await blob.arrayBuffer());
             const newModel = Model.from_bytes(bytes);
             saveModelToStorage(newModel);
-
             setModel(newModel);
+            refreshModelsData();
           }}
-        newModel={() => {
+          newModel={handleNewModel}
-          setModel(createNewModel());
+          setModel={handleSetModel}
-        }}
+          onDelete={handleDeleteModel}
-        setModel={(uuid: string) => {
+          isDrawerOpen={isDrawerOpen}
-          const newModel = selectModelFromStorage(uuid);
+          setIsDrawerOpen={setIsDrawerOpen}
-          if (newModel) {
+          refreshModelsData={refreshModelsData}
-            setModel(newModel);
-          }
-        }}
-        onDelete={() => {
-          const newModel = deleteSelectedModel();
-          if (newModel) {
-            setModel(newModel);
-          }
-        }}
         />
         <IronCalc model={model} />
-    </Wrapper>
+      </MainContent>
+    </AppContainer>
   );
 }
 
-const Wrapper = styled("div")`
+const AppContainer = styled("div")`
-  margin: 0px;
+  display: flex;
-  padding: 0px;
   width: 100%;
   height: 100%;
+  position: relative;
+  overflow: hidden;
+`;
+
+const MainContent = styled("div")<{ isDrawerOpen: boolean }>`
+  margin-left: ${({ isDrawerOpen }) => (isDrawerOpen ? "0px" : "-264px")};
+  transition: margin-left 0.3s ease;
+  width: ${({ isDrawerOpen }) =>
+    isDrawerOpen ? "calc(100% - 264px)" : "100%"};
   display: flex;
   flex-direction: column;
-  position: absolute;
 `;
 
 const Loading = styled("div")`

webapp/app.ironcalc.com/frontend/src/components/FileBar.tsx

@@ -1,59 +1,107 @@
 import styled from "@emotion/styled";
 import type { Model } from "@ironcalc/workbook";
-import { IronCalcIcon, IronCalcLogo } from "@ironcalc/workbook";
+import { Button, IconButton } from "@mui/material";
-import { useRef, useState } from "react";
+import { PanelLeftClose, PanelLeftOpen } from "lucide-react";
-import { FileMenu } from "./FileMenu";
+import { useLayoutEffect, useRef, useState } from "react";
+import { DesktopMenu, MobileMenu } from "./FileMenu";
 import { ShareButton } from "./ShareButton";
 import ShareWorkbookDialog from "./ShareWorkbookDialog";
 import { WorkbookTitle } from "./WorkbookTitle";
 import { downloadModel } from "./rpc";
 import { updateNameSelectedWorkbook } from "./storage";
 
+// This hook is used to get the width of the window
+function useWindowWidth() {
+  const [width, setWidth] = useState(0);
+  useLayoutEffect(() => {
+    function updateWidth() {
+      setWidth(window.innerWidth);
+    }
+    window.addEventListener("resize", updateWidth);
+    updateWidth();
+    return () => window.removeEventListener("resize", updateWidth);
+  }, []);
+  return width;
+}
+
 export function FileBar(properties: {
   model: Model;
   newModel: () => void;
   setModel: (key: string) => void;
   onModelUpload: (blob: ArrayBuffer, fileName: string) => Promise<void>;
   onDelete: () => void;
+  isDrawerOpen: boolean;
+  setIsDrawerOpen: (open: boolean) => void;
+  refreshModelsData: () => void; // Add this new prop
 }) {
-  const hiddenInputRef = useRef<HTMLInputElement>(null);
   const [isDialogOpen, setIsDialogOpen] = useState(false);
+  const spacerRef = useRef<HTMLDivElement>(null);
+  const [maxTitleWidth, setMaxTitleWidth] = useState(0);
+  const width = useWindowWidth();
+  const fileButtonRef = useRef<HTMLButtonElement>(null);
 
-  return (
+  // biome-ignore lint/correctness/useExhaustiveDependencies: We need to update the maxTitleWidth when the width changes
-    <FileBarWrapper>
+  useLayoutEffect(() => {
-      <StyledDesktopLogo />
+    const el = spacerRef.current;
-      <StyledIronCalcIcon />
+    if (el) {
-      <Divider />
+      const bb = el.getBoundingClientRect();
-      <FileMenu
+      setMaxTitleWidth(bb.right - bb.left - 50);
-        newModel={properties.newModel}
+    }
-        setModel={properties.setModel}
+  }, [width]);
-        onModelUpload={properties.onModelUpload}
+
-        onDownload={async () => {
+  // Common handler functions for both menu types
+  const handleDownload = async () => {
     const model = properties.model;
     const bytes = model.toBytes();
     const fileName = model.getName();
     await downloadModel(bytes, fileName);
-        }}
+  };
+
+  return (
+    <FileBarWrapper>
+      <DrawerButton
+        onClick={() => properties.setIsDrawerOpen(!properties.isDrawerOpen)}
+        disableRipple
+      >
+        {properties.isDrawerOpen ? <PanelLeftClose /> : <PanelLeftOpen />}
+      </DrawerButton>
+      <DesktopButtonsWrapper>
+        <DesktopMenu
+          newModel={properties.newModel}
+          setModel={properties.setModel}
+          onModelUpload={properties.onModelUpload}
+          onDownload={handleDownload}
           onDelete={properties.onDelete}
         />
-      <HelpButton
+        <FileBarButton
+          disableRipple
           onClick={() => window.open("https://docs.ironcalc.com", "_blank")}
         >
           Help
-      </HelpButton>
+        </FileBarButton>
+      </DesktopButtonsWrapper>
+      <MobileButtonsWrapper>
+        <MobileMenu
+          newModel={properties.newModel}
+          setModel={properties.setModel}
+          onModelUpload={properties.onModelUpload}
+          onDownload={handleDownload}
+          onDelete={properties.onDelete}
+        />
+      </MobileButtonsWrapper>
+      <Spacer ref={spacerRef} />
+      <WorkbookTitleWrapper>
         <WorkbookTitle
           name={properties.model.getName()}
           onNameChange={(name) => {
             properties.model.setName(name);
             updateNameSelectedWorkbook(properties.model, name);
+            properties.refreshModelsData();
           }}
+          maxWidth={maxTitleWidth}
         />
-      <input
+      </WorkbookTitleWrapper>
-        ref={hiddenInputRef}
+      <Spacer ref={spacerRef} />
-        type="text"
-        style={{ position: "absolute", left: -9999, top: -9999 }}
-      />
-      <div style={{ marginLeft: "auto" }} />
       <DialogContainer>
         <ShareButton onClick={() => setIsDialogOpen(true)} />
         {isDialogOpen && (
@@ -68,50 +116,92 @@ export function FileBar(properties: {
   );
 }
 
-const StyledDesktopLogo = styled(IronCalcLogo)`
+const WorkbookTitleWrapper = styled("div")`
-  width: 120px;
+  position: relative;
-  margin-left: 12px;
-  @media (max-width: 769px) {
-    display: none;
-  }
 `;
 
-const StyledIronCalcIcon = styled(IronCalcIcon)`
+// The "Spacer" component occupies as much space as possible between the menu and the share button
-  width: 36px;
+const Spacer = styled("div")`
-  margin-left: 10px;
+  flex-grow: 1;
-  @media (min-width: 769px) {
-    display: none;
-  }
 `;
 
-const HelpButton = styled("div")`
+const DrawerButton = styled(IconButton)`
-  display: flex;
+  margin-left: 8px;
-  align-items: center;
+  height: 32px;
-  font-size: 12px;
+  width: 32px;
-  font-family: Inter;
   padding: 8px;
   border-radius: 4px;
-  cursor: pointer;
+  svg {
+    stroke-width: 2px;
+    stroke: #757575;
+    width: 16px;
+    height: 16px;
+  }
   &:hover {
     background-color: #f2f2f2;
   }
+  &:active {
+    background-color: #e0e0e0;
+  }
 `;
 
-const Divider = styled("div")`
+// The container must be relative positioned so we can position the title absolutely
-  margin: 0px 8px 0px 16px;
-  height: 12px;
-  border-left: 1px solid #e0e0e0;
-`;
-
 const FileBarWrapper = styled("div")`
+  position: relative;
   height: 60px;
+  min-height: 60px;
   width: 100%;
   background: #fff;
   display: flex;
   align-items: center;
   border-bottom: 1px solid #e0e0e0;
-  position: relative;
   justify-content: space-between;
+  box-sizing: border-box;
+`;
+
+const DesktopButtonsWrapper = styled("div")`
+  display: flex;
+  gap: 4px;
+  margin-left: 8px;
+  @media (max-width: 600px) {
+    display: none;
+  }
+`;
+
+const MobileButtonsWrapper = styled("div")`
+  display: flex;
+  gap: 4px;
+  @media (min-width: 601px) {
+    display: none;
+  }
+  @media (max-width: 600px) {
+    display: flex;
+  }
+`;
+
+const FileBarButtonContainer = styled("div")`
+  position: relative;
+  display: inline-block;
+`;
+
+const FileBarButton = styled(Button)`
+  display: flex;
+  flex-direction: row;
+  align-items: center;
+  font-size: 12px;
+  height: 32px;
+  width: auto;
+  padding: 4px 8px;
+  font-weight: 400;
+  min-width: 0px;
+  text-transform: capitalize;
+  color: #333333;
+  &:hover {
+    background-color: #f2f2f2;
+  }
+  &:active {
+    background-color: #e0e0e0;
+  }
 `;
 
 const DialogContainer = styled("div")`

webapp/app.ironcalc.com/frontend/src/components/FileMenu.tsx

@@ -1,76 +1,165 @@
 import styled from "@emotion/styled";
-import { Menu, MenuItem, Modal } from "@mui/material";
+import { Button, IconButton, Menu, MenuItem, Modal } from "@mui/material";
-import { Check, FileDown, FileUp, Plus, Trash2 } from "lucide-react";
+import {
+  ChevronRight,
+  EllipsisVertical,
+  FileDown,
+  FileUp,
+  Plus,
+  Trash2,
+} from "lucide-react";
 import { useRef, useState } from "react";
 import DeleteWorkbookDialog from "./DeleteWorkbookDialog";
 import UploadFileDialog from "./UploadFileDialog";
 import { getModelsMetadata, getSelectedUuid } from "./storage";
 
+export function DesktopMenu(props: {
+  newModel: () => void;
+  setModel: (key: string) => void;
+  onDownload: () => void;
+  onModelUpload: (blob: ArrayBuffer, fileName: string) => Promise<void>;
+  onDelete: () => void;
+}) {
+  const [isFileMenuOpen, setFileMenuOpen] = useState(false);
+  const anchorElement = useRef<HTMLButtonElement>(
+    null as unknown as HTMLButtonElement,
+  );
+
+  return (
+    <>
+      <FileBarButton
+        onClick={(): void => setFileMenuOpen(!isFileMenuOpen)}
+        ref={anchorElement}
+        disableRipple
+        isOpen={isFileMenuOpen}
+      >
+        File
+      </FileBarButton>
+      <FileMenu
+        newModel={props.newModel}
+        setModel={props.setModel}
+        onDownload={props.onDownload}
+        onModelUpload={props.onModelUpload}
+        onDelete={props.onDelete}
+        isFileMenuOpen={isFileMenuOpen}
+        setFileMenuOpen={setFileMenuOpen}
+        setMobileMenuOpen={() => {}}
+        anchorElement={anchorElement}
+      />
+    </>
+  );
+}
+
+export function MobileMenu(props: {
+  newModel: () => void;
+  setModel: (key: string) => void;
+  onDownload: () => void;
+  onModelUpload: (blob: ArrayBuffer, fileName: string) => Promise<void>;
+  onDelete: () => void;
+}) {
+  const [isMobileMenuOpen, setMobileMenuOpen] = useState(false);
+  const [isFileMenuOpen, setFileMenuOpen] = useState(false);
+  const anchorElement = useRef<HTMLButtonElement>(
+    null as unknown as HTMLButtonElement,
+  );
+  const [fileMenuAnchorEl, setFileMenuAnchorEl] = useState<HTMLElement | null>(
+    null,
+  );
+
+  return (
+    <>
+      <MenuButton
+        onClick={(): void => setMobileMenuOpen(true)}
+        ref={anchorElement}
+        disableRipple
+      >
+        <EllipsisVertical />
+      </MenuButton>
+      <StyledMenu
+        open={isMobileMenuOpen}
+        onClose={(): void => setMobileMenuOpen(false)}
+        anchorEl={anchorElement.current}
+      >
+        <MenuItemWrapper
+          onClick={(event) => {
+            setFileMenuOpen(true);
+            setFileMenuAnchorEl(event.currentTarget);
+          }}
+          disableRipple
+        >
+          <MenuItemText>File</MenuItemText>
+          <ChevronRight />
+        </MenuItemWrapper>
+        <MenuDivider />
+        <MenuItemWrapper
+          onClick={() => {
+            window.open("https://docs.ironcalc.com", "_blank");
+            setMobileMenuOpen(false);
+          }}
+          disableRipple
+        >
+          <MenuItemText>Help</MenuItemText>
+        </MenuItemWrapper>
+      </StyledMenu>
+      <FileMenu
+        newModel={props.newModel}
+        setModel={props.setModel}
+        onDownload={props.onDownload}
+        onModelUpload={props.onModelUpload}
+        onDelete={props.onDelete}
+        isFileMenuOpen={isFileMenuOpen}
+        setFileMenuOpen={setFileMenuOpen}
+        setMobileMenuOpen={setMobileMenuOpen}
+        anchorElement={anchorElement}
+      />
+    </>
+  );
+}
+
 export function FileMenu(props: {
   newModel: () => void;
   setModel: (key: string) => void;
   onDownload: () => void;
   onModelUpload: (blob: ArrayBuffer, fileName: string) => Promise<void>;
   onDelete: () => void;
+  isFileMenuOpen: boolean;
+  setFileMenuOpen: (open: boolean) => void;
+  setMobileMenuOpen: (open: boolean) => void;
+  anchorElement: React.RefObject<HTMLButtonElement>;
 }) {
-  const [isMenuOpen, setMenuOpen] = useState(false);
   const [isImportMenuOpen, setImportMenuOpen] = useState(false);
-  const anchorElement = useRef<HTMLDivElement>(null);
   const models = getModelsMetadata();
-  const uuids = Object.keys(models);
   const selectedUuid = getSelectedUuid();
   const [isDeleteDialogOpen, setDeleteDialogOpen] = useState(false);
 
-  const elements = [];
-  for (const uuid of uuids) {
-    elements.push(
-      <MenuItemWrapper
-        key={uuid}
-        onClick={() => {
-          props.setModel(uuid);
-          setMenuOpen(false);
-        }}
-      >
-        <CheckIndicator>
-          {uuid === selectedUuid ? <StyledCheck /> : ""}
-        </CheckIndicator>
-        <MenuItemText
-          style={{
-            maxWidth: "240px",
-            overflow: "hidden",
-            textOverflow: "ellipsis",
-          }}
-        >
-          {models[uuid]}
-        </MenuItemText>
-      </MenuItemWrapper>,
-    );
-  }
-
   return (
     <>
-      <FileMenuWrapper
+      <StyledMenu
-        onClick={(): void => setMenuOpen(true)}
+        open={props.isFileMenuOpen}
-        ref={anchorElement}
+        onClose={(): void => props.setFileMenuOpen(false)}
-      >
+        anchorEl={props.anchorElement.current}
-        File
+        anchorOrigin={{
-      </FileMenuWrapper>
+          vertical: "bottom",
-      <Menu
+          horizontal: "left",
-        open={isMenuOpen}
+        }}
-        onClose={(): void => setMenuOpen(false)}
+        transformOrigin={{
-        anchorEl={anchorElement.current}
+          vertical: "top",
-        sx={{
+          horizontal: "left",
-          "& .MuiPaper-root": { borderRadius: "8px", padding: "4px 0px" },
+        }}
-          "& .MuiList-root": { padding: "0" },
+        // To prevent closing parent menu when interacting with submenu
+        onMouseLeave={() => {
+          if (!isImportMenuOpen && !isDeleteDialogOpen) {
+            props.setFileMenuOpen(false);
+          }
         }}
-
-        // anchorOrigin={properties.anchorOrigin}
       >
         <MenuItemWrapper
           onClick={() => {
             props.newModel();
-            setMenuOpen(false);
+            props.setFileMenuOpen(false);
+            props.setMobileMenuOpen(false);
           }}
+          disableRipple
         >
           <StyledPlus />
           <MenuItemText>New</MenuItemText>
@@ -78,30 +167,37 @@ export function FileMenu(props: {
         <MenuItemWrapper
           onClick={() => {
             setImportMenuOpen(true);
-            setMenuOpen(false);
+            props.setFileMenuOpen(false);
+            props.setMobileMenuOpen(false);
           }}
+          disableRipple
         >
           <StyledFileUp />
           <MenuItemText>Import</MenuItemText>
         </MenuItemWrapper>
-        <MenuItemWrapper>
+        <MenuItemWrapper
+          onClick={() => {
+            props.onDownload();
+            props.setMobileMenuOpen(false);
+          }}
+          disableRipple
+        >
           <StyledFileDown />
-          <MenuItemText onClick={props.onDownload}>
+          <MenuItemText>Download (.xlsx)</MenuItemText>
-            Download (.xlsx)
-          </MenuItemText>
         </MenuItemWrapper>
+        <MenuDivider />
         <MenuItemWrapper
           onClick={() => {
             setDeleteDialogOpen(true);
-            setMenuOpen(false);
+            props.setFileMenuOpen(false);
+            props.setMobileMenuOpen(false);
           }}
+          disableRipple
         >
           <StyledTrash />
           <MenuItemText>Delete workbook</MenuItemText>
         </MenuItemWrapper>
-        <MenuDivider />
+      </StyledMenu>
-        {elements}
-      </Menu>
       <Modal
         open={isImportMenuOpen}
         onClose={() => {
@@ -133,6 +229,46 @@ export function FileMenu(props: {
   );
 }
 
+const MenuButton = styled(IconButton)`
+  height: 32px;
+  width: 32px;
+  padding: 8px;
+  border-radius: 4px;
+  svg {
+    stroke-width: 2px;
+    stroke: #757575;
+    width: 16px;
+    height: 16px;
+  }
+  &:hover {
+    background-color: #f2f2f2;
+  }
+  &:active {
+    background-color: #e0e0e0;
+  }
+`;
+
+const FileBarButton = styled(Button)<{ isOpen: boolean }>`
+  display: flex;
+  flex-direction: row;
+  align-items: center;
+  font-size: 12px;
+  height: 32px;
+  width: auto;
+  padding: 4px 8px;
+  font-weight: 400;
+  min-width: 0px;
+  text-transform: capitalize;
+  color: #333333;
+  background-color: ${({ isOpen }) => (isOpen ? "#f2f2f2" : "none")};
+  &:hover {
+    background-color: #f2f2f2;
+  }
+  &:active {
+    background-color: #e0e0e0;
+  }
+`;
+
 const StyledPlus = styled(Plus)`
   width: 16px;
   height: 16px;
@@ -161,13 +297,6 @@ const StyledTrash = styled(Trash2)`
   padding-right: 10px;
 `;
 
-const StyledCheck = styled(Check)`
-  width: 16px;
-  height: 16px;
-  color: #333333;
-  padding-right: 10px;
-`;
-
 const MenuDivider = styled("div")`
   width: 100%;
   margin: auto;
@@ -179,6 +308,7 @@ const MenuDivider = styled("div")`
 const MenuItemText = styled("div")`
   color: #000;
   font-size: 12px;
+  flex-grow: 1;
 `;
 
 const MenuItemWrapper = styled(MenuItem)`
@@ -191,23 +321,19 @@ const MenuItemWrapper = styled(MenuItem)`
   border-radius: 4px;
   padding: 8px;
   height: 32px;
-`;
+  min-height: 32px;
-
+  svg {
-const FileMenuWrapper = styled("div")`
+    width: 16px;
-  display: flex;
+    height: 16px;
-  align-items: center;
-  font-size: 12px;
-  font-family: Inter;
-  padding: 8px;
-  border-radius: 4px;
-  cursor: pointer;
-  &:hover {
-    background-color: #f2f2f2;
   }
 `;
 
-const CheckIndicator = styled("span")`
+const StyledMenu = styled(Menu)`
-  display: flex;
+  .MuiPaper-root {
-  justify-content: center;
+    border-radius: 8px;
-  min-width: 26px;
+    padding: 4px 0px;
+  },
+  .MuiList-root {
+    padding: 0;
+  },
 `;

webapp/app.ironcalc.com/frontend/src/components/LeftDrawer/LeftDrawer.tsx

@@ -0,0 +1,384 @@
+import styled from "@emotion/styled";
+import { IronCalcLogo } from "@ironcalc/workbook";
+import { Avatar, Drawer, IconButton, Menu, MenuItem } from "@mui/material";
+import {
+  EllipsisVertical,
+  FileDown,
+  FileSpreadsheet,
+  Plus,
+  Trash2,
+} from "lucide-react";
+import type React from "react";
+import { useState } from "react";
+import UserMenu from "../UserMenu";
+
+interface LeftDrawerProps {
+  open: boolean;
+  onClose: () => void;
+  newModel: () => void;
+  setModel: (key: string) => void;
+  models: { [key: string]: string };
+  selectedUuid: string | null;
+}
+
+const LeftDrawer: React.FC<LeftDrawerProps> = ({
+  open,
+  onClose,
+  newModel,
+  setModel,
+  models,
+  selectedUuid,
+}) => {
+  const [menuAnchorEl, setMenuAnchorEl] = useState<null | HTMLElement>(null);
+  const [selectedWorkbookUuid, setSelectedWorkbookUuid] = useState<
+    string | null
+  >(null);
+  const [userMenuAnchorEl, setUserMenuAnchorEl] = useState<null | HTMLElement>(
+    null,
+  );
+
+  const handleMenuOpen = (
+    event: React.MouseEvent<HTMLButtonElement>,
+    uuid: string,
+  ) => {
+    console.log("Menu open", uuid);
+    event.stopPropagation();
+    setSelectedWorkbookUuid(uuid);
+    setMenuAnchorEl(event.currentTarget);
+  };
+
+  const handleMenuClose = () => {
+    setMenuAnchorEl(null);
+    setSelectedWorkbookUuid(null);
+  };
+
+  const handleUserMenuOpen = (event: React.MouseEvent<HTMLElement>) => {
+    setUserMenuAnchorEl(event.currentTarget);
+  };
+
+  const handleUserMenuClose = () => {
+    setUserMenuAnchorEl(null);
+  };
+
+  const elements = Object.keys(models)
+    .reverse()
+    .map((uuid) => {
+      const isMenuOpen = menuAnchorEl !== null && selectedWorkbookUuid === uuid;
+      return (
+        <WorkbookListItem
+          key={uuid}
+          onClick={() => {
+            setModel(uuid);
+          }}
+          selected={uuid === selectedUuid}
+          disableRipple
+        >
+          <StorageIndicator>
+            <FileSpreadsheet />
+          </StorageIndicator>
+          <WorkbookListText>{models[uuid]}</WorkbookListText>
+          <EllipsisButton
+            onClick={(e) => handleMenuOpen(e, uuid)}
+            disableRipple
+            isOpen={isMenuOpen}
+          >
+            <EllipsisVertical />
+          </EllipsisButton>
+
+          <StyledMenu
+            anchorEl={menuAnchorEl}
+            open={Boolean(menuAnchorEl)}
+            onClose={handleMenuClose}
+            MenuListProps={{
+              dense: true,
+            }}
+            anchorOrigin={{
+              vertical: "bottom",
+              horizontal: "right",
+            }}
+            transformOrigin={{
+              vertical: "top",
+              horizontal: "right",
+            }}
+            disablePortal
+          >
+            <MenuItemWrapper
+              onClick={() => {
+                handleMenuClose();
+              }}
+              disableRipple
+            >
+              <FileDown />
+              Download (.xlsx)
+            </MenuItemWrapper>
+            <MenuDivider />
+            <MenuItemWrapper
+              selected={false}
+              onClick={() => {
+                handleMenuClose();
+              }}
+              disableRipple
+            >
+              <Trash2 size={16} />
+              Delete workbook
+            </MenuItemWrapper>
+          </StyledMenu>
+        </WorkbookListItem>
+      );
+    });
+
+  return (
+    <DrawerWrapper
+      variant="persistent"
+      anchor="left"
+      open={open}
+      onClose={onClose}
+    >
+      <DrawerHeader>
+        <StyledDesktopLogo />
+        <AddButton
+          onClick={() => {
+            newModel();
+          }}
+        >
+          <PlusIcon />
+        </AddButton>
+      </DrawerHeader>
+      <DrawerContent>
+        <DrawerContentTitle>Your workbooks</DrawerContentTitle>
+        {elements}
+      </DrawerContent>
+      <DrawerFooter>
+        <UserWrapper
+          disableRipple
+          onClick={handleUserMenuOpen}
+          selected={Boolean(userMenuAnchorEl)}
+        >
+          <StyledAvatar
+            alt="Nikola Tesla"
+            src="/path/to/avatar.jpg"
+            sx={{ bgcolor: "#f2994a", width: 24, height: 24 }}
+          />
+          <Username>Nikola Tesla</Username>
+        </UserWrapper>
+        <UserMenu
+          anchorEl={userMenuAnchorEl}
+          onClose={handleUserMenuClose}
+          onPreferences={() => {
+            console.log("Preferences clicked");
+            handleUserMenuClose();
+          }}
+          onLogout={() => {
+            console.log("Logout clicked");
+            handleUserMenuClose();
+          }}
+        />
+      </DrawerFooter>
+    </DrawerWrapper>
+  );
+};
+
+const DrawerWrapper = styled(Drawer)`
+  width: 264px;
+  height: 100%;
+  flex-shrink: 0;
+  font-family: "Inter", sans-serif;
+
+  .MuiDrawer-paper {
+    width: 264px;
+    background-color: #f5f5f5;
+    overflow: hidden;
+    border-right: 1px solid #e0e0e0;
+  }
+`;
+
+const DrawerHeader = styled("div")`
+  display: flex;
+  align-items: center;
+  padding: 12px 8px 12px 16px;
+  justify-content: space-between;
+  max-height: 60px;
+  min-height: 60px;
+  border-bottom: 1px solid #e0e0e0;
+  box-sizing: border-box;
+`;
+
+const StyledDesktopLogo = styled(IronCalcLogo)`
+  width: 120px;
+  height: 28px;
+`;
+
+const AddButton = styled(IconButton)`
+  background: none;
+  border: none;
+  cursor: pointer;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  padding: 8px;
+  height: 32px;
+  width: 32px;
+  border-radius: 4px;
+  margin-left: 10px;
+  color: #333333;
+  stroke-width: 2px;
+  &:hover {
+    background-color: #e0e0e0;
+  }
+`;
+
+const PlusIcon = styled(Plus)`
+  width: 16px;
+  height: 16px;
+`;
+
+const DrawerContent = styled("div")`
+  display: flex;
+  flex-direction: column;
+  gap: 4px;
+  padding: 16px 12px;
+  height: 100%;
+  overflow: scroll;
+  font-size: 12px;
+`;
+
+const DrawerContentTitle = styled("div")`
+  font-weight: 600;
+  color: #9e9e9e;
+  margin-bottom: 8px;
+  padding: 0px 8px;
+`;
+
+const StorageIndicator = styled("div")`
+  height: 16px;
+  width: 16px;
+  svg {
+    height: 16px;
+    width: 16px;
+    stroke: #9e9e9e;
+  }
+`;
+
+const EllipsisButton = styled(IconButton)<{ isOpen: boolean }>`
+  background: none;
+  border: none;
+  cursor: pointer;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  padding: 4px;
+  height: 24px;
+  width: 24px;
+  border-radius: 4px;
+  color: #333333;
+  stroke-width: 2px;
+  background-color: ${({ isOpen }) => (isOpen ? "#E0E0E0" : "none")};
+  opacity: ${({ isOpen }) => (isOpen ? "1" : "0.5")};
+  transition: opacity 0.3s, background-color 0.3s;
+  &:hover {
+    background: none;
+    opacity: 1;
+  }
+  &:active {
+    background: #bdbdbd;
+    opacity: 1;
+  }
+`;
+
+const WorkbookListItem = styled(MenuItem)<{ selected: boolean }>`
+  display: flex;
+  gap: 8px;
+  justify-content: flex-start;
+  font-size: 14px;
+  width: 100%;
+  min-width: 172px;
+  border-radius: 8px;
+  padding: 8px 4px 8px 8px;
+  height: 32px;
+  min-height: 32px;
+  transition: gap 0.5s;
+  background-color: ${({ selected }) =>
+    selected ? "#e0e0e0 !important" : "transparent"};
+`;
+
+const WorkbookListText = styled("div")`
+  color: #000;
+  font-size: 12px;
+  width: 100%;
+  max-width: 240px;
+  overflow: hidden;
+  text-overflow: ellipsis;
+`;
+
+const StyledMenu = styled(Menu)`
+  .MuiPaper-root {
+    border-radius: 8px;
+    padding: 4px 0px;
+    box-shadow: 0px 2px 4px rgba(0, 0, 0, 0.01);
+  },
+  .MuiList-root {
+    padding: 0;
+  },
+`;
+
+const MenuDivider = styled("div")`
+  width: 100%;
+  margin: auto;
+  margin-top: 4px;
+  margin-bottom: 4px;
+  border-top: 1px solid #eeeeee;
+`;
+
+const MenuItemWrapper = styled(MenuItem)`
+  display: flex;
+  justify-content: flex-start;
+  font-size: 12px;
+  width: calc(100% - 8px);
+  min-width: 140px;
+  margin: 0px 4px;
+  border-radius: 4px;
+  padding: 8px;
+  height: 32px;
+  gap: 8px;
+  svg {
+    width: 16px;
+    height: 16px;
+  }
+`;
+
+const DrawerFooter = styled("div")`
+  display: none;
+  align-items: center;
+  padding: 12px;
+  justify-content: space-between;
+  max-height: 60px;
+  height: 60px;
+  border-top: 1px solid #e0e0e0;
+  box-sizing: border-box;
+`;
+
+const UserWrapper = styled(MenuItem)<{ selected: boolean }>`
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  flex-grow: 1;
+  padding: 8px;
+  border-radius: 8px;
+  max-width: 100%;
+  background-color: ${({ selected }) =>
+    selected ? "#e0e0e0 !important" : "transparent"};
+`;
+
+const StyledAvatar = styled(Avatar)`
+  font-size: 14px;
+`;
+
+const Username = styled("div")`
+  font-size: 12px;
+  flex-grow: 1;
+  max-width: 100%;
+  overflow: hidden;
+  text-overflow: ellipsis;
+`;
+
+export default LeftDrawer;

webapp/app.ironcalc.com/frontend/src/components/UserMenu.tsx

@@ -0,0 +1,90 @@
+import styled from "@emotion/styled";
+import { Menu, MenuItem } from "@mui/material";
+import { LogOut, Settings } from "lucide-react";
+
+interface UserMenuProps {
+  anchorEl: null | HTMLElement;
+  onClose: () => void;
+  onPreferences: () => void;
+  onLogout: () => void;
+}
+
+const UserMenu: React.FC<UserMenuProps> = ({
+  anchorEl,
+  onClose,
+  onPreferences,
+  onLogout,
+}) => {
+  return (
+    <StyledMenu
+      anchorEl={anchorEl}
+      open={Boolean(anchorEl)}
+      onClose={onClose}
+      MenuListProps={{
+        dense: true,
+      }}
+      anchorOrigin={{
+        vertical: "top",
+        horizontal: "left",
+      }}
+      transformOrigin={{
+        vertical: "bottom",
+        horizontal: "left",
+      }}
+    >
+      <MenuItemWrapper onClick={onPreferences} sx={{ gap: 1, fontSize: 14 }}>
+        <Settings size={16} />
+        <MenuItemText>Preferences</MenuItemText>
+      </MenuItemWrapper>
+      <MenuDivider />
+      <MenuItemWrapper onClick={onLogout} sx={{ gap: 1, fontSize: 14 }}>
+        <LogOut size={16} />
+        <MenuItemText>Log out</MenuItemText>
+      </MenuItemWrapper>
+    </StyledMenu>
+  );
+};
+
+const StyledMenu = styled(Menu)`
+  & .MuiPaper-root {
+    border-radius: 8px;
+    padding: 4px 0px;
+    margin-top: -4px;
+    margin-left: 4px;
+  }
+  & .MuiList-root {
+    padding: 0;
+  }
+`;
+
+const MenuItemText = styled("div")`
+  color: #000;
+  font-size: 12px;
+  flex-grow: 1;
+`;
+
+const MenuItemWrapper = styled(MenuItem)`
+  display: flex;
+  justify-content: flex-start;
+  font-size: 14px;
+  width: calc(100% - 8px);
+  min-width: 172px;
+  margin: 0px 4px;
+  border-radius: 4px;
+  padding: 8px;
+  height: 32px;
+  svg {
+    width: 16px;
+    height: 16px;
+  }
+`;
+
+const MenuDivider = styled("div")`
+  width: 100%;
+  margin: auto;
+  margin-top: 4px;
+  margin-bottom: 4px;
+  border-top: 1px solid #eeeeee;
+`;
+
+export default UserMenu;

webapp/app.ironcalc.com/frontend/src/components/WorkbookTitle.tsx

@@ -1,89 +1,105 @@
 import styled from "@emotion/styled";
-import { type ChangeEvent, useEffect, useRef, useState } from "react";
+import {
+  type ChangeEvent,
+  useEffect,
+  useLayoutEffect,
+  useRef,
+  useState,
+} from "react";
 
-export function WorkbookTitle(props: {
+// This element has a in situ editable text
+// We use a virtual element to compute the size of the input
+
+export function WorkbookTitle(properties: {
   name: string;
   onNameChange: (name: string) => void;
+  maxWidth: number;
 }) {
   const [width, setWidth] = useState(0);
-  const [value, setValue] = useState(props.name);
+  const [name, setName] = useState(properties.name);
   const mirrorDivRef = useRef<HTMLDivElement>(null);
 
-  const handleChange = (event: ChangeEvent<HTMLTextAreaElement>) => {
+  const handleChange = (event: ChangeEvent<HTMLInputElement>) => {
-    setValue(event.target.value);
+    setName(event.target.value);
     if (mirrorDivRef.current) {
       setWidth(mirrorDivRef.current.scrollWidth);
     }
   };
 
   useEffect(() => {
+    setName(properties.name);
+  }, [properties.name]);
+
+  // biome-ignore lint/correctness/useExhaustiveDependencies: We need to change the width with every value change
+  useLayoutEffect(() => {
     if (mirrorDivRef.current) {
       setWidth(mirrorDivRef.current.scrollWidth);
     }
-  }, []);
+  }, [name]);
-
-  useEffect(() => {
-    setValue(props.name);
-  }, [props.name]);
 
   return (
-    <div
+    <Container
       style={{
-        position: "absolute",
+        width: Math.min(width, properties.maxWidth),
-        left: "50%",
-        textAlign: "center",
-        transform: "translateX(-50%)",
-        // height: "60px",
-        // lineHeight: "60px",
-        padding: "8px",
-        fontSize: "14px",
-        fontWeight: "700",
-        fontFamily: "Inter",
-        width,
       }}
     >
-      <TitleWrapper
+      <TitleInput
-        value={value}
+        value={name}
-        rows={1}
+        onInput={handleChange}
-        onChange={handleChange}
         onBlur={(event) => {
-          props.onNameChange(event.target.value);
+          properties.onNameChange(event.target.value);
         }}
-        style={{ width: width }}
+        onKeyDown={(event) => {
+          switch (event.key) {
+            case "Enter": {
+              // If we hit "Enter" finish editing
+              event.currentTarget.blur();
+              break;
+            }
+            case "Escape": {
+              // revert changes
+              setName(properties.name);
+              break;
+            }
+          }
+        }}
+        style={{ width: Math.min(width, properties.maxWidth) }}
         spellCheck="false"
-      >
+      />
-        {value}
+      <MirrorDiv ref={mirrorDivRef}>{name}</MirrorDiv>
-      </TitleWrapper>
+    </Container>
-      <div
-        ref={mirrorDivRef}
-        style={{
-          position: "absolute",
-          top: "-9999px",
-          left: "-9999px",
-          whiteSpace: "pre-wrap",
-          textWrap: "nowrap",
-          visibility: "hidden",
-          fontFamily: "inherit",
-          fontSize: "inherit",
-          lineHeight: "inherit",
-          padding: "inherit",
-          border: "inherit",
-        }}
-      >
-        {value}
-      </div>
-    </div>
   );
 }
 
-const TitleWrapper = styled("textarea")`
+const Container = styled("div")`
+  text-align: left;
+  padding: 6px 4px;
+  font-size: 14px;
+  font-weight: 600;
+  font-family: Inter;
+`;
+
+const MirrorDiv = styled("div")`
+  position: absolute;
+  top: -9999px;
+  left: -9999px;
+  white-space: pre-wrap;
+  text-wrap: nowrap;
+  visibility: hidden;
+  font-family: inherit;
+  font-size: inherit;
+  line-height: inherit;
+  padding: inherit;
+  border: inherit;
+`;
+
+const TitleInput = styled("input")`
   vertical-align: middle;
   text-align: center;
   height: 20px;
   line-height: 20px;
   border-radius: 4px;
   padding: inherit;
-  overflow: hidden;
   outline: none;
   resize: none;
   text-wrap: nowrap;
@@ -92,13 +108,11 @@ const TitleWrapper = styled("textarea")`
     background-color: #f2f2f2;
   }
   &:focus {
-    border: 1px solid grey;
+    outline: 1px solid grey;
   }
   font-weight: inherit;
   font-family: inherit;
   font-size: inherit;
-  max-width: 520px;
+  overflow: ellipsis;
-  overflow: hidden;
   white-space: nowrap;
-  text-overflow: ellipsis;
 `;

webapp/app.ironcalc.com/server/Cargo.lock

@@ -925,7 +925,7 @@ dependencies = [
 
 [[package]]
 name = "ironcalc"
-version = "0.2.0"
+version = "0.5.0"
 dependencies = [
  "bitcode",
  "chrono",
@@ -940,7 +940,7 @@ dependencies = [
 
 [[package]]
 name = "ironcalc_base"
-version = "0.2.0"
+version = "0.5.0"
 dependencies = [
  "bitcode",
  "chrono",
@@ -956,7 +956,7 @@ dependencies = [
 
 [[package]]
 name = "ironcalc_server"
-version = "0.1.0"
+version = "0.5.0"
 dependencies = [
  "ironcalc",
  "rand",

xlsx/examples/hello_calc.rs

@@ -9,14 +9,14 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
     for row in 1..100 {
         for column in 1..100 {
             let value = row * column;
-            model.set_user_input(0, row, column, format!("{}", value))?;
+            model.set_user_input(0, row, column, format!("{value}"))?;
         }
     }
     // Adds a new sheet
     model.add_sheet("Calculation")?;
     // column 100 is CV
     let last_column = number_to_column(100).ok_or("Invalid column number")?;
-    let formula = format!("=SUM(Sheet1!A1:{}100)", last_column);
+    let formula = format!("=SUM(Sheet1!A1:{last_column}100)");
     model.set_user_input(1, 1, 1, formula)?;
 
     // evaluates

xlsx/src/bin/test.rs

@@ -22,7 +22,7 @@ fn main() {
     let file_name = &args[1];
     println!("Testing file: {file_name}");
     if let Err(message) = test_file(file_name) {
-        println!("{}", message);
+        println!("{message}");
         panic!("Model was evaluated inconsistently with XLSX data.")
     }
 

xlsx/src/compare.rs

@@ -176,7 +176,7 @@ pub(crate) fn compare_models(m1: &Model, m2: &Model) -> Result<(), String> {
                         diff.reason
                     );
                 }
-                Err(format!("Models are different: {}", message))
+                Err(format!("Models are different: {message}"))
             }
         }
         Err(r) => Err(format!("Models are different: {}", r.message)),

xlsx/src/export/doc_props.rs

@@ -19,10 +19,9 @@ pub(crate) fn get_app_xml(_: &Workbook) -> String {
         "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"yes\"?>
 <Properties xmlns=\"http://schemas.openxmlformats.org/officeDocument/2006/extended-properties\" \
             xmlns:vt=\"http://schemas.openxmlformats.org/officeDocument/2006/docPropsVTypes\">\
-  <Application>{}</Application>\
+  <Application>{APPLICATION}</Application>\
-  <AppVersion>{}</AppVersion>\
+  <AppVersion>{APP_VERSION}</AppVersion>\
-</Properties>",
+</Properties>"
-        APPLICATION, APP_VERSION
     )
 }
 
@@ -38,12 +37,7 @@ pub(crate) fn get_core_xml(workbook: &Workbook, milliseconds: i64) -> Result<Str
     let seconds = milliseconds / 1000;
     let dt = match DateTime::from_timestamp(seconds, 0) {
         Some(s) => s,
-        None => {
+        None => return Err(XlsxError::Xml(format!("Invalid timestamp: {milliseconds}"))),
-            return Err(XlsxError::Xml(format!(
-                "Invalid timestamp: {}",
-                milliseconds
-            )))
-        }
     };
     let last_modified = dt.format("%Y-%m-%dT%H:%M:%SZ").to_string();
     Ok(format!(
@@ -54,16 +48,15 @@ pub(crate) fn get_core_xml(workbook: &Workbook, milliseconds: i64) -> Result<Str
  xmlns:dcmitype=\"http://purl.org/dc/dcmitype/\" \
  xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"> \
 <dc:title></dc:title><dc:subject></dc:subject>\
-<dc:creator>{}</dc:creator>\
+<dc:creator>{creator}</dc:creator>\
 <cp:keywords></cp:keywords>\
 <dc:description></dc:description>\
-<cp:lastModifiedBy>{}</cp:lastModifiedBy>\
+<cp:lastModifiedBy>{last_modified_by}</cp:lastModifiedBy>\
 <cp:revision></cp:revision>\
-<dcterms:created xsi:type=\"dcterms:W3CDTF\">{}</dcterms:created>\
+<dcterms:created xsi:type=\"dcterms:W3CDTF\">{created}</dcterms:created>\
-<dcterms:modified xsi:type=\"dcterms:W3CDTF\">{}</dcterms:modified>\
+<dcterms:modified xsi:type=\"dcterms:W3CDTF\">{last_modified}</dcterms:modified>\
 <cp:category></cp:category>\
 <cp:contentStatus></cp:contentStatus>\
-</cp:coreProperties>",
+</cp:coreProperties>"
-        creator, last_modified_by, created, last_modified
     ))
 }

xlsx/src/export/mod.rs

@@ -59,7 +59,7 @@ fn get_content_types_xml(workbook: &Workbook) -> String {
 pub fn save_to_xlsx(model: &Model, file_name: &str) -> Result<(), XlsxError> {
     let file_path = std::path::Path::new(&file_name);
     if file_path.exists() {
-        return Err(XlsxError::IO(format!("file {} already exists", file_name)));
+        return Err(XlsxError::IO(format!("file {file_name} already exists")));
     }
     let file = fs::File::create(file_path).unwrap();
     let writer = BufWriter::new(file);
@@ -140,7 +140,7 @@ pub fn save_xlsx_to_writer<W: Write + Seek>(model: &Model, writer: W) -> Result<
 pub fn save_to_icalc(model: &Model, file_name: &str) -> Result<(), XlsxError> {
     let file_path = std::path::Path::new(&file_name);
     if file_path.exists() {
-        return Err(XlsxError::IO(format!("file {} already exists", file_name)));
+        return Err(XlsxError::IO(format!("file {file_name} already exists")));
     }
     let s = bitcode::encode(&model.workbook);
     let mut file = fs::File::create(file_path)?;