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Update old snapshot when only the tab size changes

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This commit is contained in:
Antonio Scandurra 2022-08-03 12:23:02 +02:00
parent 1e94eb74f4
commit 3174b08082
1 changed files with 44 additions and 44 deletions
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88
crates/editor/src/display_map/tab_map.rs
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@ -34,64 +34,64 @@ impl TabMap {
version: old_snapshot.version,
};
if old_snapshot.tab_size != new_snapshot.tab_size {
new_snapshot.version += 1;
let edits = vec![TabEdit {
old: TabPoint::zero()..old_snapshot.max_point(),
new: TabPoint::zero()..new_snapshot.max_point(),
}];
return (new_snapshot, edits);
}
if old_snapshot.fold_snapshot.version != new_snapshot.fold_snapshot.version {
new_snapshot.version += 1;
}
let old_max_offset = old_snapshot.fold_snapshot.len();
let mut tab_edits = Vec::with_capacity(fold_edits.len());
for fold_edit in &mut fold_edits {
let mut delta = 0;
for chunk in
old_snapshot
.fold_snapshot
.chunks(fold_edit.old.end..old_max_offset, false, None)
{
let patterns: &[_] = &['\t', '\n'];
if let Some(ix) = chunk.text.find(patterns) {
if &chunk.text[ix..ix + 1] == "\t" {
fold_edit.old.end.0 += delta + ix + 1;
fold_edit.new.end.0 += delta + ix + 1;
if old_snapshot.tab_size == new_snapshot.tab_size {
for fold_edit in &mut fold_edits {
let mut delta = 0;
for chunk in old_snapshot.fold_snapshot.chunks(
fold_edit.old.end..old_max_offset,
false,
None,
) {
let patterns: &[_] = &['\t', '\n'];
if let Some(ix) = chunk.text.find(patterns) {
if &chunk.text[ix..ix + 1] == "\t" {
fold_edit.old.end.0 += delta + ix + 1;
fold_edit.new.end.0 += delta + ix + 1;
}
break;
}
break;
delta += chunk.text.len();
}
delta += chunk.text.len();
}
}
let mut ix = 1;
while ix < fold_edits.len() {
let (prev_edits, next_edits) = fold_edits.split_at_mut(ix);
let prev_edit = prev_edits.last_mut().unwrap();
let edit = &next_edits[0];
if prev_edit.old.end >= edit.old.start {
prev_edit.old.end = edit.old.end;
prev_edit.new.end = edit.new.end;
fold_edits.remove(ix);
} else {
ix += 1;
let mut ix = 1;
while ix < fold_edits.len() {
let (prev_edits, next_edits) = fold_edits.split_at_mut(ix);
let prev_edit = prev_edits.last_mut().unwrap();
let edit = &next_edits[0];
if prev_edit.old.end >= edit.old.start {
prev_edit.old.end = edit.old.end;
prev_edit.new.end = edit.new.end;
fold_edits.remove(ix);
} else {
ix += 1;
}
}
}
for fold_edit in fold_edits {
let old_start = fold_edit.old.start.to_point(&old_snapshot.fold_snapshot);
let old_end = fold_edit.old.end.to_point(&old_snapshot.fold_snapshot);
let new_start = fold_edit.new.start.to_point(&new_snapshot.fold_snapshot);
let new_end = fold_edit.new.end.to_point(&new_snapshot.fold_snapshot);
for fold_edit in fold_edits {
let old_start = fold_edit.old.start.to_point(&old_snapshot.fold_snapshot);
let old_end = fold_edit.old.end.to_point(&old_snapshot.fold_snapshot);
let new_start = fold_edit.new.start.to_point(&new_snapshot.fold_snapshot);
let new_end = fold_edit.new.end.to_point(&new_snapshot.fold_snapshot);
tab_edits.push(TabEdit {
old: old_snapshot.to_tab_point(old_start)..old_snapshot.to_tab_point(old_end),
new: new_snapshot.to_tab_point(new_start)..new_snapshot.to_tab_point(new_end),
});
}
} else {
new_snapshot.version += 1;
tab_edits.push(TabEdit {
old: old_snapshot.to_tab_point(old_start)..old_snapshot.to_tab_point(old_end),
new: new_snapshot.to_tab_point(new_start)..new_snapshot.to_tab_point(new_end),
old: TabPoint::zero()..old_snapshot.max_point(),
new: TabPoint::zero()..new_snapshot.max_point(),
});
}