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Fix handling of empty blocks in BlockMap::chunks (#25031)

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Closes https://github.com/zed-industries/zed/issues/23391

Release Notes:

- Fixed a bug that sometimes caused incorrect syntax highlighting when
deploying the inline assistant.
This commit is contained in:
Max Brunsfeld 2025-02-17 11:20:19 -08:00 • committed by GitHub
parent 69477dfd8c
commit 1e1b637b50
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GPG key ID: B5690EEEBB952194
2 changed files with 31 additions and 16 deletions
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32
crates/editor/src/display_map.rs
View file

@ -2070,18 +2070,30 @@ pub mod tests {
)
});
// Insert a block in the middle of a multi-line string literal
// Insert two blocks in the middle of a multi-line string literal.
// The second block has zero height.
map.update(cx, |map, cx| {
map.insert_blocks(
[BlockProperties {
placement: BlockPlacement::Below(
buffer_snapshot.anchor_before(Point::new(1, 0)),
),
height: 1,
style: BlockStyle::Sticky,
render: Arc::new(|_| div().into_any()),
priority: 0,
}],
[
BlockProperties {
placement: BlockPlacement::Below(
buffer_snapshot.anchor_before(Point::new(1, 0)),
),
height: 1,
style: BlockStyle::Sticky,
render: Arc::new(|_| div().into_any()),
priority: 0,
},
BlockProperties {
placement: BlockPlacement::Below(
buffer_snapshot.anchor_before(Point::new(2, 0)),
),
height: 0,
style: BlockStyle::Sticky,
render: Arc::new(|_| div().into_any()),
priority: 0,
},
],
cx,
)
});

15
crates/editor/src/display_map/block_map.rs
View file

@ -1721,6 +1721,7 @@ impl BlockSnapshot {
impl<'a> BlockChunks<'a> {
/// Go to the next transform
fn advance(&mut self) {
self.input_chunk = Chunk::default();
self.transforms.next(&());
while let Some(transform) = self.transforms.item() {
if transform
@ -1748,7 +1749,6 @@ impl<'a> BlockChunks<'a> {
);
self.input_chunks.seek(start_input_row..end_input_row);
}
self.input_chunk = Chunk::default();
}
}
}
@ -1812,9 +1812,6 @@ impl<'a> Iterator for BlockChunks<'a> {
let (mut prefix, suffix) = self.input_chunk.text.split_at(prefix_bytes);
self.input_chunk.text = suffix;
if self.output_row == transform_end {
self.advance();
}
if self.masked {
// Not great for multibyte text because to keep cursor math correct we
@ -1824,10 +1821,16 @@ impl<'a> Iterator for BlockChunks<'a> {
prefix = &BULLETS[..bullet_len];
}
Some(Chunk {
let chunk = Chunk {
text: prefix,
..self.input_chunk.clone()
})
};
if self.output_row == transform_end {
self.advance();
}
Some(chunk)
}
}