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This commit is contained in:
Ariel Davis 2023-05-06 00:59:56 -07:00
parent 02e8bb0c6e
commit 84a6cb3bfc
1 changed files with 26 additions and 35 deletions
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61
lib/line-index/src/lib.rs
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@ -157,13 +157,36 @@ impl LineIndex {
/// Transforms the `LineCol` with the given `WideEncoding` into a `WideLineCol`.
pub fn to_wide(&self, enc: WideEncoding, line_col: LineCol) -> Option<WideLineCol> {
let col = self.utf8_to_wide_col(enc, line_col.line, line_col.col.into());
Some(WideLineCol { line: line_col.line, col: col as u32 })
let col: TextSize = line_col.col.into();
let mut res: usize = col.into();
if let Some(wide_chars) = self.line_wide_chars.get(&line_col.line) {
for c in wide_chars.iter() {
if c.end <= col {
res -= usize::from(c.len()) - c.wide_len(enc);
} else {
// From here on, all utf16 characters come *after* the character we are mapping,
// so we don't need to take them into account
break;
}
}
}
Some(WideLineCol { line: line_col.line, col: res as u32 })
}
/// Transforms the `WideLineCol` with the given `WideEncoding` into a `LineCol`.
pub fn to_utf8(&self, enc: WideEncoding, line_col: WideLineCol) -> Option<LineCol> {
let col = self.wide_to_utf8_col(enc, line_col.line, line_col.col);
let mut col = line_col.col;
if let Some(wide_chars) = self.line_wide_chars.get(&line_col.line) {
for c in wide_chars.iter() {
if col > u32::from(c.start) {
col += u32::from(c.len()) - c.wide_len(enc) as u32;
} else {
// From here on, all utf16 characters come *after* the character we are mapping,
// so we don't need to take them into account
break;
}
}
}
Some(LineCol { line: line_col.line, col: col.into() })
}
@ -180,36 +203,4 @@ impl LineIndex {
.map(|(lo, hi)| TextRange::new(lo, hi))
.filter(|it| !it.is_empty())
}
fn utf8_to_wide_col(&self, enc: WideEncoding, line: u32, col: TextSize) -> usize {
let mut res: usize = col.into();
if let Some(wide_chars) = self.line_wide_chars.get(&line) {
for c in wide_chars.iter() {
if c.end <= col {
res -= usize::from(c.len()) - c.wide_len(enc);
} else {
// From here on, all utf16 characters come *after* the character we are mapping,
// so we don't need to take them into account
break;
}
}
}
res
}
fn wide_to_utf8_col(&self, enc: WideEncoding, line: u32, mut col: u32) -> TextSize {
if let Some(wide_chars) = self.line_wide_chars.get(&line) {
for c in wide_chars.iter() {
if col > u32::from(c.start) {
col += u32::from(c.len()) - c.wide_len(enc) as u32;
} else {
// From here on, all utf16 characters come *after* the character we are mapping,
// so we don't need to take them into account
break;
}
}
}
col.into()
}
}