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