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Add BufferSnapshot::edited_ranges_for_transaction

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Co-Authored-By: Nathan Sobo <nathan@zed.dev>
This commit is contained in:
Max Brunsfeld 2022-02-09 17:04:07 -08:00
parent 1ee15e1a59
commit ca697e1bba
2 changed files with 75 additions and 9 deletions
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44
crates/text/src/text.rs
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@ -1730,14 +1730,6 @@ impl BufferSnapshot {
self.visible_text.clip_point_utf16(point, bias)
}
// pub fn point_for_offset(&self, offset: usize) -> Result<Point> {
// if offset <= self.len() {
// Ok(self.text_summary_for_range(0..offset))
// } else {
// Err(anyhow!("offset out of bounds"))
// }
// }
pub fn edits_since<'a, D>(
&'a self,
since: &'a clock::Global,
@ -1748,6 +1740,42 @@ impl BufferSnapshot {
self.edits_since_in_range(since, Anchor::min()..Anchor::max())
}
pub fn edited_ranges_for_transaction<'a, D>(
&'a self,
transaction: &'a Transaction,
) -> impl 'a + Iterator<Item = Range<D>>
where
D: TextDimension,
{
let mut cursor = self.fragments.cursor::<(VersionedFullOffset, usize)>();
let mut rope_cursor = self.visible_text.cursor(0);
let cx = Some(transaction.end.clone());
let mut position = D::default();
transaction.ranges.iter().map(move |range| {
cursor.seek_forward(&VersionedFullOffset::Offset(range.start), Bias::Right, &cx);
let mut start_offset = cursor.start().1;
if cursor
.item()
.map_or(false, |fragment| fragment.is_visible(&self.undo_map))
{
start_offset += range.start - cursor.start().0.full_offset()
}
position.add_assign(&rope_cursor.summary(start_offset));
let start = position.clone();
cursor.seek_forward(&VersionedFullOffset::Offset(range.end), Bias::Left, &cx);
let mut end_offset = cursor.start().1;
if cursor
.item()
.map_or(false, |fragment| fragment.is_visible(&self.undo_map))
{
end_offset += range.end - cursor.start().0.full_offset();
}
position.add_assign(&rope_cursor.summary(end_offset));
start..position.clone()
})
}
pub fn edits_since_in_range<'a, D>(
&'a self,
since: &'a clock::Global,