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This commit is contained in:
Ariel Davis 2023-05-06 00:56:30 -07:00
parent fcbe73ec1c
commit 9de213c4fe
1 changed files with 16 additions and 11 deletions
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27
lib/line-index/src/lib.rs
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@ -93,29 +93,30 @@ pub struct LineIndex {
impl LineIndex { impl LineIndex {
/// Returns a `LineIndex` for the `text`. /// Returns a `LineIndex` for the `text`.
pub fn new(text: &str) -> LineIndex { pub fn new(text: &str) -> LineIndex {
let mut line_wide_chars = IntMap::default();
let mut wide_chars = Vec::new();
let mut newlines = Vec::with_capacity(16); let mut newlines = Vec::with_capacity(16);
let mut line_wide_chars = IntMap::default();
let mut wide_chars = Vec::new();
let mut cur_row = TextSize::from(0);
let mut cur_col = TextSize::from(0);
let mut line = 0;
newlines.push(TextSize::from(0)); newlines.push(TextSize::from(0));
let mut cur_row = 0.into();
let mut cur_col = 0.into();
let mut line = 0;
for c in text.chars() { for c in text.chars() {
let c_len = TextSize::of(c); let c_len = TextSize::of(c);
cur_row += c_len; cur_row += c_len;
if c == '\n' { if c == '\n' {
newlines.push(cur_row); newlines.push(cur_row);
// Save any utf-16 characters seen in the previous line // Save any wide characters seen in the previous line
if !wide_chars.is_empty() { if !wide_chars.is_empty() {
line_wide_chars let cs = std::mem::take(&mut wide_chars).into_boxed_slice();
.insert(line, std::mem::take(&mut wide_chars).into_boxed_slice()); line_wide_chars.insert(line, cs);
} }
// Prepare for processing the next line // Prepare for processing the next line
cur_col = 0.into(); cur_col = TextSize::from(0);
line += 1; line += 1;
continue; continue;
} }
@ -127,7 +128,7 @@ impl LineIndex {
cur_col += c_len; cur_col += c_len;
} }
// Save any utf-16 characters seen in the last line // Save any wide characters seen in the last line
if !wide_chars.is_empty() { if !wide_chars.is_empty() {
line_wide_chars.insert(line, wide_chars.into_boxed_slice()); line_wide_chars.insert(line, wide_chars.into_boxed_slice());
} }
@ -136,6 +137,10 @@ impl LineIndex {
} }
/// Transforms the `TextSize` into a `LineCol`. /// Transforms the `TextSize` into a `LineCol`.
///
/// # Panics
///
/// If the offset is invalid.
pub fn line_col(&self, offset: TextSize) -> LineCol { pub fn line_col(&self, offset: TextSize) -> LineCol {
let line = self.newlines.partition_point(|&it| it <= offset) - 1; let line = self.newlines.partition_point(|&it| it <= offset) - 1;
let line_start_offset = self.newlines[line]; let line_start_offset = self.newlines[line];