FIX: Prevent negative column width, row height (#167)

* Prevent negative column width / row height in rust

* prevent in front-end

base/src/test/test_column_width.rs

@@ -82,3 +82,21 @@ fn test_column_width_higher_edge() {
     assert!((worksheet.get_column_width(17).unwrap() - DEFAULT_COLUMN_WIDTH).abs() < f64::EPSILON);
     assert_eq!(model.get_cell_style_index(0, 23, 16), Ok(1));
 }
+
+#[test]
+fn test_column_width_negative() {
+    let mut model = new_empty_model();
+    let result = model
+        .workbook
+        .worksheet_mut(0)
+        .unwrap()
+        .set_column_width(16, -1.0);
+    assert_eq!(result, Err("Can not set a negative width: -1".to_string()));
+    assert_eq!(model.workbook.worksheets[0].cols.len(), 0);
+    let worksheet = model.workbook.worksheet(0).unwrap();
+    assert_eq!(
+        (worksheet.get_column_width(16).unwrap()),
+        DEFAULT_COLUMN_WIDTH
+    );
+    assert_eq!(model.get_cell_style_index(0, 23, 16), Ok(0));
+}

base/src/test/test_general.rs

@@ -1,5 +1,7 @@
 #![allow(clippy::unwrap_used)]
 
+use crate::constants::DEFAULT_ROW_HEIGHT;
+
 use crate::cell::CellValue;
 
 use crate::number_format::to_excel_precision_str;
@@ -113,6 +115,15 @@ fn test_set_row_height() {
     worksheet.set_row_height(5, 5.0).unwrap();
     let worksheet = model.workbook.worksheet(0).unwrap();
     assert!((5.0 - worksheet.row_height(5).unwrap()).abs() < f64::EPSILON);
+
+    let worksheet = model.workbook.worksheet_mut(0).unwrap();
+    let result = worksheet.set_row_height(6, -1.0);
+    assert_eq!(result, Err("Can not set a negative height: -1".to_string()));
+
+    assert_eq!(worksheet.row_height(6).unwrap(), DEFAULT_ROW_HEIGHT);
+
+    worksheet.set_row_height(6, 0.0).unwrap();
+    assert_eq!(worksheet.row_height(6).unwrap(), 0.0);
 }
 
 #[test]

base/src/worksheet.rs

@@ -255,11 +255,14 @@ impl Worksheet {
     ///   * If the row does not a have a style we add it.
     ///   * If it has we modify the height and make sure it is applied.
     ///
-    /// Fails if column index is outside allowed range.
+    /// Fails if row index is outside allowed range or height is negative.
     pub fn set_row_height(&mut self, row: i32, height: f64) -> Result<(), String> {
         if !is_valid_row(row) {
             return Err(format!("Row number '{row}' is not valid."));
         }
+        if height < 0.0 {
+            return Err(format!("Can not set a negative height: {height}"));
+        }
 
         let rows = &mut self.rows;
         for r in rows.iter_mut() {
@@ -284,7 +287,7 @@ impl Worksheet {
     ///   * If the column does not a have a width we simply add it
     ///   * If it has, it might be part of a range and we ned to split the range.
     ///
-    /// Fails if column index is outside allowed range.
+    /// Fails if column index is outside allowed range or width is negative.
     pub fn set_column_width(&mut self, column: i32, width: f64) -> Result<(), String> {
         self.set_column_width_and_style(column, width, None)
     }
@@ -298,6 +301,9 @@ impl Worksheet {
         if !is_valid_column_number(column) {
             return Err(format!("Column number '{column}' is not valid."));
         }
+        if width < 0.0 {
+            return Err(format!("Can not set a negative width: {width}"));
+        }
         let cols = &mut self.cols;
         let mut col = Col {
             min: column,