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Use an AsyncHook for picker preview highlighting

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The picker previously used the IdleTimeout event as a trigger for
syntax-highlighting the currently selected document in the preview pane.
This is a bit ad-hoc now that the event system has landed and we can
refactor towards an AsyncHook (like those used for LSP completion and
signature-help). This should resolve some odd scenarios where the
preview did not highlight because of a race between the idle timeout
and items appearing in the picker.
This commit is contained in:
Michael Davis 2024-02-15 15:13:44 -05:00
parent 1bad3b0dd4
commit dae3841a75
No known key found for this signature in database
2 changed files with 161 additions and 103 deletions
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147
helix-term/src/ui/picker.rs
View File

@ -1,3 +1,5 @@
mod handlers;
use crate::{
alt,
compositor::{self, Component, Compositor, Context, Event, EventResult},
@ -10,9 +12,11 @@
EditorView,
},
};
use futures_util::{future::BoxFuture, FutureExt};
use futures_util::future::BoxFuture;
use helix_event::AsyncHook;
use nucleo::pattern::CaseMatching;
use nucleo::{Config, Nucleo, Utf32String};
use tokio::sync::mpsc::Sender;
use tui::{
buffer::Buffer as Surface,
layout::Constraint,
@ -25,7 +29,7 @@
use std::{
collections::HashMap,
io::Read,
path::PathBuf,
path::{Path, PathBuf},
sync::{
atomic::{self, AtomicBool},
Arc,
@ -36,7 +40,6 @@
use helix_core::{
char_idx_at_visual_offset, fuzzy::MATCHER, movement::Direction,
text_annotations::TextAnnotations, unicode::segmentation::UnicodeSegmentation, Position,
Syntax,
};
use helix_view::{
editor::Action,
@ -46,9 +49,12 @@
Document, DocumentId, Editor,
};
pub const ID: &str = "picker";
use self::handlers::PreviewHighlightHandler;
use super::{menu::Item, overlay::Overlay};
pub const ID: &str = "picker";
pub const MIN_AREA_WIDTH_FOR_PREVIEW: u16 = 72;
/// Biggest file size to preview in bytes
pub const MAX_FILE_SIZE_FOR_PREVIEW: u64 = 10 * 1024 * 1024;
@ -56,14 +62,14 @@
#[derive(PartialEq, Eq, Hash)]
pub enum PathOrId {
Id(DocumentId),
Path(PathBuf),
Path(Arc<Path>),
}
impl PathOrId {
fn get_canonicalized(self) -> Self {
use PathOrId::*;
match self {
Path(path) => Path(helix_stdx::path::canonicalize(path)),
Path(path) => Path(helix_stdx::path::canonicalize(&path).into()),
Id(id) => Id(id),
}
}
@ -71,7 +77,7 @@ fn get_canonicalized(self) -> Self {
impl From<PathBuf> for PathOrId {
fn from(v: PathBuf) -> Self {
Self::Path(v)
Self::Path(v.as_path().into())
}
}
@ -197,10 +203,12 @@ pub struct Picker<T: Item> {
pub truncate_start: bool,
/// Caches paths to documents
preview_cache: HashMap<PathBuf, CachedPreview>,
preview_cache: HashMap<Arc<Path>, CachedPreview>,
read_buffer: Vec<u8>,
/// Given an item in the picker, return the file path and line number to display.
file_fn: Option<FileCallback<T>>,
/// An event handler for syntax highlighting the currently previewed file.
preview_highlight_handler: Sender<Arc<Path>>,
}
impl<T: Item + 'static> Picker<T> {
@ -280,6 +288,7 @@ fn with(
preview_cache: HashMap::new(),
read_buffer: Vec::with_capacity(1024),
file_fn: None,
preview_highlight_handler: PreviewHighlightHandler::<T>::default().spawn(),
}
}
@ -403,16 +412,26 @@ fn get_preview<'picker, 'editor>(
) -> Preview<'picker, 'editor> {
match path_or_id {
PathOrId::Path(path) => {
let path = &path;
if let Some(doc) = editor.document_by_path(path) {
if let Some(doc) = editor.document_by_path(&path) {
return Preview::EditorDocument(doc);
}
if self.preview_cache.contains_key(path) {
return Preview::Cached(&self.preview_cache[path]);
if self.preview_cache.contains_key(&path) {
let preview = &self.preview_cache[&path];
match preview {
// If the document isn't highlighted yet, attempt to highlight it.
CachedPreview::Document(doc) if doc.language_config().is_none() => {
helix_event::send_blocking(
&self.preview_highlight_handler,
path.clone(),
);
}
_ => (),
}
return Preview::Cached(preview);
}
let data = std::fs::File::open(path).and_then(|file| {
let data = std::fs::File::open(&path).and_then(|file| {
let metadata = file.metadata()?;
// Read up to 1kb to detect the content type
let n = file.take(1024).read_to_end(&mut self.read_buffer)?;
@ -427,14 +446,21 @@ fn get_preview<'picker, 'editor>(
(size, _) if size > MAX_FILE_SIZE_FOR_PREVIEW => {
CachedPreview::LargeFile
}
_ => Document::open(path, None, None, editor.config.clone())
.map(|doc| CachedPreview::Document(Box::new(doc)))
_ => Document::open(&path, None, None, editor.config.clone())
.map(|doc| {
// Asynchronously highlight the new document
helix_event::send_blocking(
&self.preview_highlight_handler,
path.clone(),
);
CachedPreview::Document(Box::new(doc))
})
.unwrap_or(CachedPreview::NotFound),
},
)
.unwrap_or(CachedPreview::NotFound);
self.preview_cache.insert(path.to_owned(), preview);
Preview::Cached(&self.preview_cache[path])
self.preview_cache.insert(path.clone(), preview);
Preview::Cached(&self.preview_cache[&path])
}
PathOrId::Id(id) => {
let doc = editor.documents.get(&id).unwrap();
@ -443,84 +469,6 @@ fn get_preview<'picker, 'editor>(
}
}
fn handle_idle_timeout(&mut self, cx: &mut Context) -> EventResult {
let Some((current_file, _)) = self.current_file(cx.editor) else {
return EventResult::Consumed(None);
};
// Try to find a document in the cache
let doc = match &current_file {
PathOrId::Id(doc_id) => doc_mut!(cx.editor, doc_id),
PathOrId::Path(path) => match self.preview_cache.get_mut(path) {
Some(CachedPreview::Document(ref mut doc)) => doc,
_ => return EventResult::Consumed(None),
},
};
let mut callback: Option<compositor::Callback> = None;
// Then attempt to highlight it if it has no language set
if doc.language_config().is_none() {
if let Some(language_config) = doc.detect_language_config(&cx.editor.syn_loader.load())
{
doc.language = Some(language_config.clone());
let text = doc.text().clone();
let loader = cx.editor.syn_loader.clone();
let job = tokio::task::spawn_blocking(move || {
let syntax = language_config
.highlight_config(&loader.load().scopes())
.and_then(|highlight_config| {
Syntax::new(text.slice(..), highlight_config, loader)
});
let callback = move |editor: &mut Editor, compositor: &mut Compositor| {
let Some(syntax) = syntax else {
log::info!("highlighting picker item failed");
return;
};
let picker = match compositor.find::<Overlay<Self>>() {
Some(Overlay { content, .. }) => Some(content),
None => compositor
.find::<Overlay<DynamicPicker<T>>>()
.map(|overlay| &mut overlay.content.file_picker),
};
let Some(picker) = picker else {
log::info!("picker closed before syntax highlighting finished");
return;
};
// Try to find a document in the cache
let doc = match current_file {
PathOrId::Id(doc_id) => doc_mut!(editor, &doc_id),
PathOrId::Path(path) => match picker.preview_cache.get_mut(&path) {
Some(CachedPreview::Document(ref mut doc)) => {
let diagnostics = Editor::doc_diagnostics(
&editor.language_servers,
&editor.diagnostics,
doc,
);
doc.replace_diagnostics(diagnostics, &[], None);
doc
}
_ => return,
},
};
doc.syntax = Some(syntax);
};
Callback::EditorCompositor(Box::new(callback))
});
let tmp: compositor::Callback = Box::new(move |_, ctx| {
ctx.jobs
.callback(job.map(|res| res.map_err(anyhow::Error::from)))
});
callback = Some(Box::new(tmp))
}
}
// QUESTION: do we want to compute inlay hints in pickers too ? Probably not for now
// but it could be interesting in the future
EventResult::Consumed(callback)
}
fn render_picker(&mut self, area: Rect, surface: &mut Surface, cx: &mut Context) {
let status = self.matcher.tick(10);
let snapshot = self.matcher.snapshot();
@ -826,9 +774,6 @@ fn render(&mut self, area: Rect, surface: &mut Surface, cx: &mut Context) {
}
fn handle_event(&mut self, event: &Event, ctx: &mut Context) -> EventResult {
if let Event::IdleTimeout = event {
return self.handle_idle_timeout(ctx);
}
// TODO: keybinds for scrolling preview
let key_event = match event {
@ -861,9 +806,6 @@ fn handle_event(&mut self, event: &Event, ctx: &mut Context) -> EventResult {
EventResult::Consumed(Some(callback))
};
// So that idle timeout retriggers
ctx.editor.reset_idle_timer();
match key_event {
shift!(Tab) | key!(Up) | ctrl!('p') => {
self.move_by(1, Direction::Backward);
@ -989,7 +931,7 @@ fn handle_event(&mut self, event: &Event, cx: &mut Context) -> EventResult {
cx.jobs.callback(async move {
let new_options = new_options.await?;
let callback = Callback::EditorCompositor(Box::new(move |editor, compositor| {
let callback = Callback::EditorCompositor(Box::new(move |_editor, compositor| {
// Wrapping of pickers in overlay is done outside the picker code,
// so this is fragile and will break if wrapped in some other widget.
let picker = match compositor.find_id::<Overlay<DynamicPicker<T>>>(ID) {
@ -997,7 +939,6 @@ fn handle_event(&mut self, event: &Event, cx: &mut Context) -> EventResult {
None => return,
};
picker.set_options(new_options);
editor.reset_idle_timer();
}));
anyhow::Ok(callback)
});

117
helix-term/src/ui/picker/handlers.rs Normal file
View File

@ -0,0 +1,117 @@
use std::{path::Path, sync::Arc, time::Duration};
use helix_event::AsyncHook;
use tokio::time::Instant;
use crate::{
job,
ui::{menu::Item, overlay::Overlay},
};
use super::{CachedPreview, DynamicPicker, Picker};
pub(super) struct PreviewHighlightHandler<T: Item> {
trigger: Option<Arc<Path>>,
phantom_data: std::marker::PhantomData<T>,
}
impl<T: Item> Default for PreviewHighlightHandler<T> {
fn default() -> Self {
Self {
trigger: None,
phantom_data: Default::default(),
}
}
}
impl<T: Item> AsyncHook for PreviewHighlightHandler<T> {
type Event = Arc<Path>;
fn handle_event(
&mut self,
path: Self::Event,
timeout: Option<tokio::time::Instant>,
) -> Option<tokio::time::Instant> {
if self
.trigger
.as_ref()
.is_some_and(|trigger| trigger == &path)
{
// If the path hasn't changed, don't reset the debounce
timeout
} else {
self.trigger = Some(path);
Some(Instant::now() + Duration::from_millis(150))
}
}
fn finish_debounce(&mut self) {
let Some(path) = self.trigger.take() else {
return;
};
job::dispatch_blocking(move |editor, compositor| {
let picker = match compositor.find::<Overlay<Picker<T>>>() {
Some(Overlay { content, .. }) => content,
None => match compositor.find::<Overlay<DynamicPicker<T>>>() {
Some(Overlay { content, .. }) => &mut content.file_picker,
None => return,
},
};
let Some(CachedPreview::Document(ref mut doc)) = picker.preview_cache.get_mut(&path)
else {
return;
};
if doc.language_config().is_some() {
return;
}
let Some(language_config) = doc.detect_language_config(&editor.syn_loader.load())
else {
return;
};
doc.language = Some(language_config.clone());
let text = doc.text().clone();
let loader = editor.syn_loader.clone();
tokio::task::spawn_blocking(move || {
let Some(syntax) = language_config
.highlight_config(&loader.load().scopes())
.and_then(|highlight_config| {
helix_core::Syntax::new(text.slice(..), highlight_config, loader)
})
else {
log::info!("highlighting picker item failed");
return;
};
job::dispatch_blocking(move |editor, compositor| {
let picker = match compositor.find::<Overlay<Picker<T>>>() {
Some(Overlay { content, .. }) => Some(content),
None => compositor
.find::<Overlay<DynamicPicker<T>>>()
.map(|overlay| &mut overlay.content.file_picker),
};
let Some(picker) = picker else {
log::info!("picker closed before syntax highlighting finished");
return;
};
let Some(CachedPreview::Document(ref mut doc)) =
picker.preview_cache.get_mut(&path)
else {
return;
};
let diagnostics = helix_view::Editor::doc_diagnostics(
&editor.language_servers,
&editor.diagnostics,
doc,
);
doc.replace_diagnostics(diagnostics, &[], None);
doc.syntax = Some(syntax);
});
});
});
}
}