da017b6113
The II operator takes a range and returns a single cell that is in the same column or the same row as the present cell. This is needed for backwards compatibility with old Excel models and as a first step towards dynamic arrays. In the past Excel would evaluate `=A1:A10` in cell `C3` as `A3`, but today in results in an array containing all values in the range. To be compatible with old workbooks Excel inserts the II operator on those cases. So this PR performs an static analysis on all formulas inserting on import automatically the II operator where necessary. This we call the _automatic implicit operator_. When exporting to Excel the operator is striped away. You can also manually use the II. For instance `=SUM(@A1:A10)` in cell `C3`. This was not possible before and such a formula would break backwards compatibility with Excel. To Excel that "non automatic" form of the II is exported as `_xlfn.SINGLE()`. Th static analysis has to be done for all arithmetic operations and all functions. This is a bit of a daunting task and it is not done fully in this PR. We also need to implement arrays and dynamic arrays. My believe is that once the core operations have been implemented we can go formula by formula writing proper tests and documentation. After this PR formulas like `=A1:A10` for instance will return `#N/IMPL!` instead of performing the implicit intersection
54 lines
1.7 KiB
Rust
54 lines
1.7 KiB
Rust
use std::vec::Vec;
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use crate::{expressions::parser::DefinedNameS, types::*};
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impl Workbook {
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pub fn get_worksheet_names(&self) -> Vec<String> {
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self.worksheets
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.iter()
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.map(|worksheet| worksheet.get_name())
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.collect()
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}
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pub fn get_worksheet_ids(&self) -> Vec<u32> {
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self.worksheets
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.iter()
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.map(|worksheet| worksheet.get_sheet_id())
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.collect()
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}
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pub fn worksheet(&self, worksheet_index: u32) -> Result<&Worksheet, String> {
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self.worksheets
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.get(worksheet_index as usize)
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.ok_or_else(|| "Invalid sheet index".to_string())
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}
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pub fn worksheet_mut(&mut self, worksheet_index: u32) -> Result<&mut Worksheet, String> {
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self.worksheets
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.get_mut(worksheet_index as usize)
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.ok_or_else(|| "Invalid sheet index".to_string())
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}
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/// Returns the a list of defined names in the workbook with their scope
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pub fn get_defined_names_with_scope(&self) -> Vec<DefinedNameS> {
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let sheet_id_index: Vec<u32> = self.worksheets.iter().map(|s| s.sheet_id).collect();
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let defined_names = self
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.defined_names
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.iter()
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.map(|dn| {
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let index = dn
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.sheet_id
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.and_then(|sheet_id| {
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// returns an Option<usize>
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sheet_id_index.iter().position(|&x| x == sheet_id)
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})
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// convert Option<usize> to Option<u32>
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.map(|pos| pos as u32);
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(dn.name.clone(), index, dn.formula.clone())
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})
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.collect::<Vec<_>>();
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defined_names
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}
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}
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