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Use size field

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This commit is contained in:
Ariel Davis 2023-05-06 15:10:35 -07:00
parent 510050ecdc
commit cc2936b93e
1 changed files with 8 additions and 6 deletions
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14
lib/line-index/src/lib.rs
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@ -84,11 +84,11 @@ impl WideChar {
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct LineIndex {
/// Offset the beginning of each line (except the first, which always has offset 0).
///
/// Invariant: Always non-empty and the last element holds the length of the original text.
newlines: Box<[TextSize]>,
/// List of non-ASCII characters on each line.
line_wide_chars: IntMap<u32, Box<[WideChar]>>,
/// The size of the entire text.
size: TextSize,
}
impl LineIndex {
@ -127,14 +127,16 @@ impl LineIndex {
cur_col += c_len;
}
newlines.push(TextSize::of(text));
// Save any wide characters seen in the last line
if !wide_chars.is_empty() {
line_wide_chars.insert(line, wide_chars.into_boxed_slice());
}
LineIndex { newlines: newlines.into_boxed_slice(), line_wide_chars }
LineIndex {
newlines: newlines.into_boxed_slice(),
line_wide_chars,
size: TextSize::of(text),
}
}
/// Transforms the `TextSize` into a `LineCol`.
@ -150,7 +152,7 @@ impl LineIndex {
/// e.g. if it extends past the end of the text or points to the middle of a multi-byte
/// character.
pub fn try_line_col(&self, offset: TextSize) -> Option<LineCol> {
if offset > *self.newlines.last().unwrap() {
if offset > self.size {
return None;
}
let line = self.newlines.partition_point(|&it| it <= offset);