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Find the layer with the smallest enclosing node in language_scope_at

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This commit is contained in:
Max Brunsfeld 2023-07-11 14:15:45 -07:00
parent bf9dfa3b51
commit 2e2333107a
6 changed files with 151 additions and 69 deletions
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34
crates/language/src/buffer.rs
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@ -2145,23 +2145,27 @@ impl BufferSnapshot {
pub fn language_scope_at<D: ToOffset>(&self, position: D) -> Option<LanguageScope> {
let offset = position.to_offset(self);
let mut range = 0..self.len();
let mut scope = self.language.clone().map(|language| LanguageScope {
language,
override_id: None,
});
if let Some(layer_info) = self
.syntax
.layers_for_range(offset..offset, &self.text)
.filter(|l| l.node().end_byte() > offset)
.last()
{
Some(LanguageScope {
language: layer_info.language.clone(),
override_id: layer_info.override_id(offset, &self.text),
})
} else {
self.language.clone().map(|language| LanguageScope {
language,
override_id: None,
})
// Use the layer that has the smallest node intersecting the given point.
for layer in self.syntax.layers_for_range(offset..offset, &self.text) {
let mut cursor = layer.node().walk();
while cursor.goto_first_child_for_byte(offset).is_some() {}
let node_range = cursor.node().byte_range();
if node_range.to_inclusive().contains(&offset) && node_range.len() < range.len() {
range = node_range;
scope = Some(LanguageScope {
language: layer.language.clone(),
override_id: layer.override_id(offset, &self.text),
});
}
}
scope
}
pub fn surrounding_word<T: ToOffset>(&self, start: T) -> (Range<usize>, Option<CharKind>) {