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Try to reuse an existing layer based on layer.ranges

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This commit is contained in:
Blaž Hrastnik 2022-01-03 16:20:46 +09:00
parent 72eb2ce1f1
commit 8a53e34e66
2 changed files with 77 additions and 36 deletions
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2
flake.nix
View File

@ -72,7 +72,7 @@
};
};
shell = common: prev: {
packages = prev.packages ++ (with common.pkgs; [ lld_13 lldb cargo-tarpaulin ]);
packages = prev.packages ++ (with common.pkgs; [ lld_13 lldb cargo-tarpaulin cargo-flamegraph ]);
env = prev.env ++ [
{ name = "HELIX_RUNTIME"; eval = "$PWD/runtime"; }
{ name = "RUST_BACKTRACE"; value = "1"; }

111
helix-core/src/syntax.rs
View File

@ -459,9 +459,10 @@ pub fn update(
source: &Rope,
changeset: &ChangeSet,
) -> Result<(), Error> {
use std::collections::VecDeque;
use std::collections::{HashSet, VecDeque};
let mut queue = VecDeque::new();
// let source = source.slice(..);
queue.push_back(self.root);
let injection_callback = |language: &str| {
self.loader
.language_configuration_for_injection_string(language)
@ -470,21 +471,26 @@ pub fn update(
})
};
queue.push_back(self.root);
// HAXX: for now, clear all layers except root so they get re-parsed
self.layers.retain(|id, _| id == self.root);
// Workaround for Syntax::new() with empty changeset
if !changeset.is_empty() {
// TODO: do this in a recursive way
// Notify the tree about all the changes
let edits = generate_edits(old_source.slice(..), changeset);
let tree = self.layers[self.root].tree.as_mut().unwrap();
for edit in edits.iter().rev() {
// apply the edits in reverse. If we applied them in order then edit 1 would disrupt
// the positioning of edit 2
tree.edit(edit);
// Convert the changeset into tree sitter edits.
let edits = generate_edits(old_source, changeset);
// TODO: use the edits to update all layers markers
if !edits.is_empty() {
for layer in &mut self.layers.values_mut() {
for range in &mut layer.ranges {
for edit in &edits {
// if edit is after range, skip
if edit.start_byte > range.end_byte {
continue;
}
// if edit is before range, shift entire range by len
if edit.old_end_byte < range.start_byte {}
}
}
}
}
@ -495,10 +501,26 @@ pub fn update(
let source_slice = source.slice(..);
while let Some(layer_id) = queue.pop_front() {
// Re-parse the tree.
self.layers[layer_id].parse(ts_parser, source)?;
let mut touched = HashSet::new();
// TODO: we should be able to avoid editing & parsing layers with ranges earlier in the document before the edit
while let Some(layer_id) = queue.pop_front() {
let layer = &mut self.layers[layer_id];
// If a tree already exists, notify it of changes.
if let Some(tree) = &mut layer.tree {
for edit in edits.iter().rev() {
// Apply the edits in reverse.
// If we applied them in order then edit 1 would disrupt the positioning of edit 2.
tree.edit(edit);
}
}
// Re-parse the tree.
layer.parse(ts_parser, source)?;
// Switch to an immutable borrow.
let layer = &self.layers[layer_id];
// Process injections.
@ -529,7 +551,6 @@ pub fn update(
intersect_ranges(&layer.ranges, &[content_node], include_children);
if !ranges.is_empty() {
log::info!("{} {:?}", language_name, ranges);
injections.push((config, ranges));
}
}
@ -581,28 +602,46 @@ pub fn update(
let depth = layer.depth + 1;
// TODO: can't inline this since matches borrows self.layers
for (config, ranges) in injections {
let layer_id = self.layers.insert(LanguageLayer {
tree: None,
config,
depth,
ranges,
// Find an existing layer
let layer = self
.layers
.iter_mut()
.find(|(_, layer)| {
layer.depth == depth && // TODO: track parent id instead
layer.config.language == config.language && layer.ranges == ranges
})
.map(|(id, _layer)| id);
// ...or insert a new one.
let layer_id = layer.unwrap_or_else(|| {
self.layers.insert(LanguageLayer {
tree: None,
config,
depth,
ranges,
})
});
queue.push_back(layer_id);
}
// Mark the layer as touched
touched.insert(layer_id);
// TODO: pre-process local scopes at this time, rather than highlight?
// would solve problems with locals not working across boundaries
}
// Return the cursor back in the pool.
ts_parser.cursors.push(cursor);
Ok(()) // so we can use the try operator
})?;
// Remove all untouched layers
self.layers.retain(|id, _| touched.contains(&id));
Ok(())
Ok(())
})
}
// fn buffer_changed -> call layer.update(range, new_text) on root layer and then all marker layers
// call this on transaction.apply() -> buffer_changed(changes)
pub fn tree(&self) -> &Tree {
self.layers[self.root].tree()
}
@ -619,8 +658,6 @@ pub fn tree(&self) -> &Tree {
//
// layer update:
// if range.len = 0 then remove the layer
// for change in changes { tree.edit(change) }
// tree = parser.parse(.., tree, ..)
// calculate affected range and update injections
// injection update:
// look for existing injections
@ -776,7 +813,7 @@ fn parse(&mut self, ts_parser: &mut TsParser, source: &Rope) -> Result<(), Error
}
pub(crate) fn generate_edits(
old_text: RopeSlice,
old_text: &Rope,
changeset: &ChangeSet,
) -> Vec<tree_sitter::InputEdit> {
use Operation::*;
@ -784,11 +821,15 @@ pub(crate) fn generate_edits(
let mut edits = Vec::new();
if changeset.changes.is_empty() {
return edits;
}
let mut iter = changeset.changes.iter().peekable();
// TODO; this is a lot easier with Change instead of Operation.
fn point_at_pos(text: RopeSlice, pos: usize) -> (usize, Point) {
fn point_at_pos(text: &Rope, pos: usize) -> (usize, Point) {
let byte = text.char_to_byte(pos); // <- attempted to index past end
let line = text.char_to_line(pos);
let line_start_byte = text.line_to_byte(line);
@ -1816,7 +1857,7 @@ fn test_input_edits() {
&doc,
vec![(6, 11, Some("test".into())), (12, 17, None)].into_iter(),
);
let edits = generate_edits(doc.slice(..), transaction.changes());
let edits = generate_edits(&doc, transaction.changes());
// transaction.apply(&mut state);
assert_eq!(
@ -1845,7 +1886,7 @@ fn test_input_edits() {
let mut doc = Rope::from("fn test() {}");
let transaction =
Transaction::change(&doc, vec![(8, 8, Some("a: u32".into()))].into_iter());
let edits = generate_edits(doc.slice(..), transaction.changes());
let edits = generate_edits(&doc, transaction.changes());
transaction.apply(&mut doc);
assert_eq!(doc, "fn test(a: u32) {}");