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multi_buffer: Reuse buffer chunks iterator when seeking across folds within an excerpt (#15532)

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Release Notes:

- N/A

---------

Co-authored-by: Max Brunsfeld <maxbrunsfeld@gmail.com>
This commit is contained in:
Piotr Osiewicz 2024-07-31 19:29:15 +02:00 • committed by GitHub
parent 7259d092a7
commit 7a0149f17c
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GPG key ID: B5690EEEBB952194
1 changed files with 21 additions and 4 deletions
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25
crates/multi_buffer/src/multi_buffer.rs
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@ -298,6 +298,7 @@ pub struct ReversedMultiBufferBytes<'a> {
}
struct ExcerptChunks<'a> {
excerpt_id: ExcerptId,
content_chunks: BufferChunks<'a>,
footer_height: usize,
}
@ -4145,11 +4146,18 @@ impl Excerpt {
let content_chunks = self.buffer.chunks(chunks_start..chunks_end, language_aware);
ExcerptChunks {
excerpt_id: self.id,
content_chunks,
footer_height,
}
}
fn seek_chunks(&self, excerpt_chunks: &mut ExcerptChunks, offset: usize) {
let content_start = self.range.context.start.to_offset(&self.buffer);
let chunks_start = content_start + offset;
excerpt_chunks.content_chunks.seek(chunks_start);
}
fn bytes_in_range(&self, range: Range<usize>) -> ExcerptBytes {
let content_start = self.range.context.start.to_offset(&self.buffer);
let bytes_start = content_start + range.start;
@ -4488,10 +4496,19 @@ impl<'a> MultiBufferChunks<'a> {
self.range.start = offset;
self.excerpts.seek(&offset, Bias::Right, &());
if let Some(excerpt) = self.excerpts.item() {
self.excerpt_chunks = Some(excerpt.chunks_in_range(
self.range.start - self.excerpts.start()..self.range.end - self.excerpts.start(),
self.language_aware,
));
let excerpt_start = self.excerpts.start();
if let Some(excerpt_chunks) = self
.excerpt_chunks
.as_mut()
.filter(|chunks| excerpt.id == chunks.excerpt_id)
{
excerpt.seek_chunks(excerpt_chunks, self.range.start - excerpt_start);
} else {
self.excerpt_chunks = Some(excerpt.chunks_in_range(
self.range.start - excerpt_start..self.range.end - excerpt_start,
self.language_aware,
));
}
} else {
self.excerpt_chunks = None;
}