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-rw-r--r--helix-term/src/ui/completion.rs156
-rw-r--r--helix-term/src/ui/editor.rs8
2 files changed, 97 insertions, 67 deletions
diff --git a/helix-term/src/ui/completion.rs b/helix-term/src/ui/completion.rs
index 48d97fbd..6cbb5b10 100644
--- a/helix-term/src/ui/completion.rs
+++ b/helix-term/src/ui/completion.rs
@@ -1,7 +1,9 @@
use crate::{
compositor::{Component, Context, Event, EventResult},
handlers::trigger_auto_completion,
+ job,
};
+use helix_event::AsyncHook;
use helix_view::{
document::SavePoint,
editor::CompleteAction,
@@ -10,14 +12,14 @@ use helix_view::{
theme::{Modifier, Style},
ViewId,
};
+use tokio::time::Instant;
use tui::{buffer::Buffer as Surface, text::Span};
-use std::{borrow::Cow, sync::Arc};
+use std::{borrow::Cow, sync::Arc, time::Duration};
use helix_core::{chars, Change, Transaction};
use helix_view::{graphics::Rect, Document, Editor};
-use crate::commands;
use crate::ui::{menu, Markdown, Menu, Popup, PromptEvent};
use helix_lsp::{lsp, util, OffsetEncoding};
@@ -102,6 +104,7 @@ pub struct Completion {
#[allow(dead_code)]
trigger_offset: usize,
filter: String,
+ resolve_handler: tokio::sync::mpsc::Sender<CompletionItem>,
}
impl Completion {
@@ -368,6 +371,7 @@ impl Completion {
// TODO: expand nucleo api to allow moving straight to a Utf32String here
// and avoid allocation during matching
filter: String::from(fragment),
+ resolve_handler: ResolveHandler::default().spawn(),
};
// need to recompute immediately in case start_offset != trigger_offset
@@ -379,6 +383,8 @@ impl Completion {
completion
}
+ /// Synchronously resolve the given completion item. This is used when
+ /// accepting a completion.
fn resolve_completion_item(
language_server: &helix_lsp::Client,
completion_item: lsp::CompletionItem,
@@ -386,7 +392,7 @@ impl Completion {
let future = language_server.resolve_completion_item(completion_item)?;
let response = helix_lsp::block_on(future);
match response {
- Ok(value) => serde_json::from_value(value).ok(),
+ Ok(item) => Some(item),
Err(err) => {
log::error!("Failed to resolve completion item: {}", err);
None
@@ -420,62 +426,6 @@ impl Completion {
self.popup.contents_mut().replace_option(old_item, new_item);
}
- /// Asynchronously requests that the currently selection completion item is
- /// resolved through LSP `completionItem/resolve`.
- pub fn ensure_item_resolved(&mut self, cx: &mut commands::Context) -> bool {
- // > If computing full completion items is expensive, servers can additionally provide a
- // > handler for the completion item resolve request. ...
- // > A typical use case is for example: the `textDocument/completion` request doesn't fill
- // > in the `documentation` property for returned completion items since it is expensive
- // > to compute. When the item is selected in the user interface then a
- // > 'completionItem/resolve' request is sent with the selected completion item as a parameter.
- // > The returned completion item should have the documentation property filled in.
- // https://microsoft.github.io/language-server-protocol/specifications/lsp/3.17/specification/#textDocument_completion
- let current_item = match self.popup.contents().selection() {
- Some(item) if !item.resolved => item.clone(),
- _ => return false,
- };
-
- let Some(language_server) = cx
- .editor
- .language_server_by_id(current_item.language_server_id)
- else {
- return false;
- };
-
- // This method should not block the compositor so we handle the response asynchronously.
- let Some(future) = language_server.resolve_completion_item(current_item.item.clone())
- else {
- return false;
- };
-
- cx.callback(
- future,
- move |_editor, compositor, response: Option<lsp::CompletionItem>| {
- let resolved_item = match response {
- Some(item) => item,
- None => return,
- };
-
- if let Some(completion) = &mut compositor
- .find::<crate::ui::EditorView>()
- .unwrap()
- .completion
- {
- let resolved_item = CompletionItem {
- item: resolved_item,
- language_server_id: current_item.language_server_id,
- resolved: true,
- };
-
- completion.replace_item(current_item, resolved_item);
- }
- },
- );
-
- true
- }
-
pub fn area(&mut self, viewport: Rect, editor: &Editor) -> Rect {
self.popup.area(viewport, editor)
}
@@ -498,6 +448,9 @@ impl Component for Completion {
Some(option) => option,
None => return,
};
+ if !option.resolved {
+ helix_event::send_blocking(&self.resolve_handler, option.clone());
+ }
// need to render:
// option.detail
// ---
@@ -599,3 +552,88 @@ impl Component for Completion {
markdown_doc.render(doc_area, surface, cx);
}
}
+
+/// A hook for resolving incomplete completion items.
+///
+/// From the [LSP spec](https://microsoft.github.io/language-server-protocol/specifications/lsp/3.17/specification/#textDocument_completion):
+///
+/// > If computing full completion items is expensive, servers can additionally provide a
+/// > handler for the completion item resolve request. ...
+/// > A typical use case is for example: the `textDocument/completion` request doesn't fill
+/// > in the `documentation` property for returned completion items since it is expensive
+/// > to compute. When the item is selected in the user interface then a
+/// > 'completionItem/resolve' request is sent with the selected completion item as a parameter.
+/// > The returned completion item should have the documentation property filled in.
+#[derive(Debug, Default)]
+struct ResolveHandler {
+ trigger: Option<CompletionItem>,
+ request: Option<helix_event::CancelTx>,
+}
+
+impl AsyncHook for ResolveHandler {
+ type Event = CompletionItem;
+
+ fn handle_event(
+ &mut self,
+ item: Self::Event,
+ timeout: Option<tokio::time::Instant>,
+ ) -> Option<tokio::time::Instant> {
+ if self
+ .trigger
+ .as_ref()
+ .is_some_and(|trigger| trigger == &item)
+ {
+ timeout
+ } else {
+ self.trigger = Some(item);
+ self.request = None;
+ Some(Instant::now() + Duration::from_millis(150))
+ }
+ }
+
+ fn finish_debounce(&mut self) {
+ let Some(item) = self.trigger.take() else { return };
+ let (tx, rx) = helix_event::cancelation();
+ self.request = Some(tx);
+ job::dispatch_blocking(move |editor, _| resolve_completion_item(editor, item, rx))
+ }
+}
+
+fn resolve_completion_item(
+ editor: &mut Editor,
+ item: CompletionItem,
+ cancel: helix_event::CancelRx,
+) {
+ let Some(language_server) = editor.language_server_by_id(item.language_server_id) else {
+ return;
+ };
+
+ let Some(future) = language_server.resolve_completion_item(item.item.clone()) else {
+ return;
+ };
+
+ tokio::spawn(async move {
+ match helix_event::cancelable_future(future, cancel).await {
+ Some(Ok(resolved_item)) => {
+ job::dispatch(move |_, compositor| {
+ if let Some(completion) = &mut compositor
+ .find::<crate::ui::EditorView>()
+ .unwrap()
+ .completion
+ {
+ let resolved_item = CompletionItem {
+ item: resolved_item,
+ language_server_id: item.language_server_id,
+ resolved: true,
+ };
+
+ completion.replace_item(item, resolved_item);
+ };
+ })
+ .await
+ }
+ Some(Err(err)) => log::error!("completion resolve request failed: {err}"),
+ None => (),
+ }
+ });
+}
diff --git a/helix-term/src/ui/editor.rs b/helix-term/src/ui/editor.rs
index 66f290a2..15a7262a 100644
--- a/helix-term/src/ui/editor.rs
+++ b/helix-term/src/ui/editor.rs
@@ -1027,14 +1027,6 @@ impl EditorView {
pub fn handle_idle_timeout(&mut self, cx: &mut commands::Context) -> EventResult {
commands::compute_inlay_hints_for_all_views(cx.editor, cx.jobs);
- if let Some(completion) = &mut self.completion {
- return if completion.ensure_item_resolved(cx) {
- EventResult::Consumed(None)
- } else {
- EventResult::Ignored(None)
- };
- }
-
EventResult::Ignored(None)
}
}