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feat: utility fn to convert from index to rowcol

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əlemi 2023-11-24 11:04:42 +01:00
parent 488c22c0f1
commit 3bc1159ffc
1 changed files with 10 additions and 0 deletions
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10
src/api/change.rs
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@ -3,6 +3,8 @@
//! an editor-friendly representation of a text change in a buffer //! an editor-friendly representation of a text change in a buffer
//! to easily interface with codemp from various editors //! to easily interface with codemp from various editors
use crate::proto::RowCol;
/// an editor-friendly representation of a text change in a buffer /// an editor-friendly representation of a text change in a buffer
/// ///
/// this represent a range in the previous state of the string and a new content which should be /// this represent a range in the previous state of the string and a new content which should be
@ -56,4 +58,12 @@ impl TextChange {
content: after[start..end_after].to_string(), content: after[start..end_after].to_string(),
} }
} }
/// convert from byte index to row and column
/// txt must be the whole content of the buffer, in order to count lines
pub fn index_to_rowcol(txt: &str, index: usize) -> RowCol {
let row = txt[..index].matches('\n').count() as i32;
let col = txt[..index].split('\n').last().unwrap_or("").len() as i32;
RowCol { row, col }
}
} }