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58 lines
1.2 KiB
Rust
58 lines
1.2 KiB
Rust
/// Represents a single point in a text buffer. Zero indexed.
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#[derive(Debug, Default, Clone, Copy, PartialEq, Eq, PartialOrd, Ord)]
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pub struct Position {
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pub row: usize,
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pub col: usize,
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}
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impl Position {
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pub const fn new(row: usize, col: usize) -> Self {
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Self { row, col }
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}
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pub const fn is_zero(self) -> bool {
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self.row == 0 && self.col == 0
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}
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// TODO: generalize
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pub fn traverse(self, text: &crate::Tendril) -> Self {
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let Self { mut row, mut col } = self;
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// TODO: there should be a better way here
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for ch in text.chars() {
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if ch == '\n' {
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row += 1;
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col = 0;
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} else {
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col += 1;
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}
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}
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Self { row, col }
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}
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}
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impl From<(usize, usize)> for Position {
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fn from(tuple: (usize, usize)) -> Self {
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Position {
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row: tuple.0,
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col: tuple.1,
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}
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}
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}
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impl From<Position> for tree_sitter::Point {
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fn from(pos: Position) -> Self {
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Self::new(pos.row, pos.col)
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}
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}
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#[cfg(test)]
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mod test {
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use super::*;
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#[test]
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fn test_ordering() {
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// (0, 5) is less than (1, 0)
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assert!(Position::new(0, 5) < Position::new(1, 0));
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}
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}
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