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Speed up WrapSnapshot::line_len using the indexed transforms

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This commit is contained in:
Antonio Scandurra 2022-04-14 13:01:29 +02:00
parent 91d4c835ad
commit 1a1d670104
1 changed files with 21 additions and 7 deletions
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28
crates/editor/src/display_map/wrap_map.rs
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@ -599,16 +599,23 @@ impl WrapSnapshot {
}
pub fn line_len(&self, row: u32) -> u32 {
let mut len = 0;
for chunk in self.text_chunks(row) {
if let Some(newline_ix) = chunk.find('\n') {
len += newline_ix;
break;
let mut cursor = self.transforms.cursor::<(WrapPoint, TabPoint)>();
cursor.seek(&WrapPoint::new(row + 1, 0), Bias::Left, &());
if cursor
.item()
.map_or(false, |transform| transform.is_isomorphic())
{
let overshoot = row - cursor.start().0.row();
let tab_row = cursor.start().1.row() + overshoot;
let tab_line_len = self.tab_snapshot.line_len(tab_row);
if overshoot == 0 {
cursor.start().0.column() + (tab_line_len - cursor.start().1.column())
} else {
len += chunk.len();
tab_line_len
}
} else {
cursor.start().0.column()
}
len as u32
}
pub fn soft_wrap_indent(&self, row: u32) -> Option<u32> {
@ -741,6 +748,7 @@ impl WrapSnapshot {
}
}
let text = language::Rope::from(self.text().as_str());
let input_buffer_rows = self.buffer_snapshot().buffer_rows(0).collect::<Vec<_>>();
let mut expected_buffer_rows = Vec::new();
let mut prev_tab_row = 0;
@ -754,6 +762,8 @@ impl WrapSnapshot {
expected_buffer_rows.push(input_buffer_rows[buffer_point.row as usize]);
prev_tab_row = tab_point.row();
}
assert_eq!(self.line_len(display_row), text.line_len(display_row));
}
for start_display_row in 0..expected_buffer_rows.len() {
@ -957,6 +967,10 @@ impl WrapPoint {
&mut self.0.row
}
pub fn column(self) -> u32 {
self.0.column
}
pub fn column_mut(&mut self) -> &mut u32 {
&mut self.0.column
}