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Avoid repeated subscriptions + clones when adding another excerpt for same buffer

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This commit is contained in:
Max Brunsfeld 2021-12-21 14:28:23 -08:00
parent 3c26f67ea3
commit a93f5e5fb4
1 changed files with 12 additions and 17 deletions
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29
crates/editor/src/multi_buffer.rs
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@ -68,13 +68,13 @@ pub trait FromAnchor: 'static {
fn from_anchor(anchor: &Anchor, snapshot: &MultiBufferSnapshot) -> Self;
}
#[derive(Debug)]
struct BufferState {
buffer: ModelHandle<Buffer>,
last_version: clock::Global,
last_parse_count: usize,
last_diagnostics_update_count: usize,
excerpts: Vec<ExcerptId>,
_subscriptions: [gpui::Subscription; 2],
}
#[derive(Clone, Default)]
@ -599,17 +599,9 @@ impl MultiBuffer {
assert_eq!(self.history.transaction_depth, 0);
self.sync(cx);
let buffer = props.buffer.clone();
cx.observe(&buffer, |_, _, cx| cx.notify()).detach();
cx.subscribe(&buffer, Self::on_buffer_event).detach();
let buffer_snapshot = buffer.read(cx).snapshot();
let buffer_snapshot = props.buffer.read(cx).snapshot();
let range = buffer_snapshot.anchor_before(&props.range.start)
..buffer_snapshot.anchor_after(&props.range.end);
let last_version = buffer_snapshot.version().clone();
let last_parse_count = buffer_snapshot.parse_count();
let last_diagnostics_update_count = buffer_snapshot.diagnostics_update_count();
let mut snapshot = self.snapshot.borrow_mut();
let mut prev_id = None;
let edit_start = snapshot.excerpts.summary().text.bytes;
@ -622,27 +614,30 @@ impl MultiBuffer {
);
let id = ExcerptId::between(&prev_id.unwrap_or(ExcerptId::min()), &ExcerptId::max());
let excerpt = Excerpt::new(id.clone(), buffer.id(), buffer_snapshot, range, false);
snapshot.excerpts.push(excerpt, &());
self.buffers
.borrow_mut()
.entry(props.buffer.id())
.or_insert_with(|| BufferState {
buffer,
last_version,
last_parse_count,
last_diagnostics_update_count,
last_version: buffer_snapshot.version().clone(),
last_parse_count: buffer_snapshot.parse_count(),
last_diagnostics_update_count: buffer_snapshot.diagnostics_update_count(),
excerpts: Default::default(),
_subscriptions: [
cx.observe(&props.buffer, |_, _, cx| cx.notify()),
cx.subscribe(&props.buffer, Self::on_buffer_event),
],
buffer: props.buffer.clone(),
})
.excerpts
.push(id.clone());
let excerpt = Excerpt::new(id.clone(), props.buffer.id(), buffer_snapshot, range, false);
snapshot.excerpts.push(excerpt, &());
self.subscriptions.publish_mut([Edit {
old: edit_start..edit_start,
new: edit_start..snapshot.excerpts.summary().text.bytes,
}]);
cx.notify();
id
}