Only skip /refresh inlay queries when vislble range is not updated

crates/editor/src/inlay_hint_cache.rs

@@ -57,6 +57,39 @@ struct ExcerptDimensions {
     excerpt_visible_range_end: language::Anchor,
 }
 
+impl ExcerptQuery {
+    fn hints_fetch_ranges(&self, buffer: &BufferSnapshot) -> HintFetchRanges {
+        let visible_range =
+            self.dimensions.excerpt_visible_range_start..self.dimensions.excerpt_visible_range_end;
+        let mut other_ranges = Vec::new();
+        if self
+            .dimensions
+            .excerpt_range_start
+            .cmp(&self.dimensions.excerpt_visible_range_start, buffer)
+            .is_lt()
+        {
+            let mut end = self.dimensions.excerpt_visible_range_start;
+            end.offset -= 1;
+            other_ranges.push(self.dimensions.excerpt_range_start..end);
+        }
+        if self
+            .dimensions
+            .excerpt_range_end
+            .cmp(&self.dimensions.excerpt_visible_range_end, buffer)
+            .is_gt()
+        {
+            let mut start = self.dimensions.excerpt_visible_range_end;
+            start.offset += 1;
+            other_ranges.push(start..self.dimensions.excerpt_range_end);
+        }
+
+        HintFetchRanges {
+            visible_range,
+            other_ranges: other_ranges.into_iter().map(|range| range).collect(),
+        }
+    }
+}
+
 impl UpdateTask {
     fn new(invalidation_strategy: InvalidationStrategy, spawned_task: SpawnedTask) -> Self {
         Self {
@@ -427,17 +460,18 @@ fn new_update_task(
     buffer_snapshot: BufferSnapshot,
     visible_hints: Arc<Vec<Inlay>>,
     cached_excerpt_hints: Option<Arc<RwLock<CachedExcerptHints>>>,
-    previous_task: Option<smol::channel::Receiver<()>>,
+    task_before_refresh: Option<smol::channel::Receiver<()>>,
     cx: &mut ViewContext<'_, '_, Editor>,
 ) -> SpawnedTask {
-    let hints_fetch_tasks = hints_fetch_tasks(query, &buffer_snapshot, cx);
+    let hints_fetch_tasks = query.hints_fetch_ranges(&buffer_snapshot);
     let (is_running_tx, is_running_rx) = smol::channel::bounded(1);
+    let is_refresh_task = task_before_refresh.is_some();
     let _task = cx.spawn(|editor, cx| async move {
         let _is_running_tx = is_running_tx;
-        if let Some(previous_task) = previous_task {
-            previous_task.recv().await.ok();
+        if let Some(task_before_refresh) = task_before_refresh {
+            task_before_refresh.recv().await.ok();
         }
-        let create_update_task = |range, hint_fetch_task| {
+        let create_update_task = |range| {
             fetch_and_update_hints(
                 editor.clone(),
                 multi_buffer_snapshot.clone(),
@@ -446,14 +480,13 @@ fn new_update_task(
                 cached_excerpt_hints.as_ref().map(Arc::clone),
                 query,
                 range,
-                hint_fetch_task,
                 cx.clone(),
             )
         };
 
-        let (visible_range, visible_range_hint_fetch_task) = hints_fetch_tasks.visible_range;
+        if is_refresh_task {
             let visible_range_has_updates =
-            match create_update_task(visible_range, visible_range_hint_fetch_task).await {
+                match create_update_task(hints_fetch_tasks.visible_range).await {
                     Ok(updated) => updated,
                     Err(e) => {
                         error!("inlay hint visible range update task failed: {e:#}");
@@ -462,12 +495,12 @@ fn new_update_task(
                 };
 
             if visible_range_has_updates {
-            let other_update_results =
-                futures::future::join_all(hints_fetch_tasks.other_ranges.into_iter().map(
-                    |(fetch_range, hints_fetch_task)| {
-                        create_update_task(fetch_range, hints_fetch_task)
-                    },
-                ))
+                let other_update_results = futures::future::join_all(
+                    hints_fetch_tasks
+                        .other_ranges
+                        .into_iter()
+                        .map(create_update_task),
+                )
                 .await;
 
                 for result in other_update_results {
@@ -477,6 +510,20 @@ fn new_update_task(
                     }
                 }
             }
+        } else {
+            let task_update_results = futures::future::join_all(
+                std::iter::once(hints_fetch_tasks.visible_range)
+                    .chain(hints_fetch_tasks.other_ranges.into_iter())
+                    .map(create_update_task),
+            )
+            .await;
+
+            for result in task_update_results {
+                if let Err(e) = result {
+                    error!("inlay hint update task failed: {e:#}");
+                }
+            }
+        }
     });
 
     SpawnedTask {
@@ -494,12 +541,29 @@ async fn fetch_and_update_hints(
     cached_excerpt_hints: Option<Arc<RwLock<CachedExcerptHints>>>,
     query: ExcerptQuery,
     fetch_range: Range<language::Anchor>,
-    hints_fetch_task: Task<anyhow::Result<Option<Vec<InlayHint>>>>,
     mut cx: gpui::AsyncAppContext,
 ) -> anyhow::Result<bool> {
+    let inlay_hints_fetch_task = editor
+        .update(&mut cx, |editor, cx| {
+            editor
+                .buffer()
+                .read(cx)
+                .buffer(query.buffer_id)
+                .and_then(|buffer| {
+                    let project = editor.project.as_ref()?;
+                    Some(project.update(cx, |project, cx| {
+                        project.inlay_hints(buffer, fetch_range.clone(), cx)
+                    }))
+                })
+        })
+        .ok()
+        .flatten();
     let mut update_happened = false;
-    match hints_fetch_task.await.context("inlay hint fetch task")? {
-        Some(new_hints) => {
+    let Some(inlay_hints_fetch_task) = inlay_hints_fetch_task else { return Ok(update_happened) };
+
+    let new_hints = inlay_hints_fetch_task
+        .await
+        .context("inlay hint fetch task")?;
     let background_task_buffer_snapshot = buffer_snapshot.clone();
     let backround_fetch_range = fetch_range.clone();
     if let Some(new_update) = cx
@@ -559,11 +623,9 @@ async fn fetch_and_update_hints(
                         .allowed_hint_kinds
                         .contains(&new_hint.kind)
                     {
-                                splice.to_insert.push((
-                                    new_hint_position,
-                                    new_inlay_id,
-                                    new_hint.clone(),
-                                ));
+                        splice
+                            .to_insert
+                            .push((new_hint_position, new_inlay_id, new_hint.clone()));
                     }
 
                     cached_excerpt_hints.hints.push((new_inlay_id, new_hint));
@@ -586,9 +648,6 @@ async fn fetch_and_update_hints(
             })
             .ok();
     }
-        }
-        None => {}
-    }
 
     Ok(update_happened)
 }
@@ -713,77 +772,9 @@ fn allowed_hint_types(
     new_allowed_hint_types
 }
 
-struct HintFetchTasks {
-    visible_range: (
-        Range<language::Anchor>,
-        Task<anyhow::Result<Option<Vec<InlayHint>>>>,
-    ),
-    other_ranges: Vec<(
-        Range<language::Anchor>,
-        Task<anyhow::Result<Option<Vec<InlayHint>>>>,
-    )>,
-}
-
-fn hints_fetch_tasks(
-    query: ExcerptQuery,
-    buffer: &BufferSnapshot,
-    cx: &mut ViewContext<'_, '_, Editor>,
-) -> HintFetchTasks {
-    let visible_range =
-        query.dimensions.excerpt_visible_range_start..query.dimensions.excerpt_visible_range_end;
-    let mut other_ranges = Vec::new();
-    if query
-        .dimensions
-        .excerpt_range_start
-        .cmp(&query.dimensions.excerpt_visible_range_start, buffer)
-        .is_lt()
-    {
-        let mut end = query.dimensions.excerpt_visible_range_start;
-        end.offset -= 1;
-        other_ranges.push(query.dimensions.excerpt_range_start..end);
-    }
-    if query
-        .dimensions
-        .excerpt_range_end
-        .cmp(&query.dimensions.excerpt_visible_range_end, buffer)
-        .is_gt()
-    {
-        let mut start = query.dimensions.excerpt_visible_range_end;
-        start.offset += 1;
-        other_ranges.push(start..query.dimensions.excerpt_range_end);
-    }
-
-    let mut query_task_for_range = |range_to_query| {
-        cx.spawn(|editor, mut cx| async move {
-            let task = editor
-                .update(&mut cx, |editor, cx| {
-                    editor
-                        .buffer()
-                        .read(cx)
-                        .buffer(query.buffer_id)
-                        .and_then(|buffer| {
-                            let project = editor.project.as_ref()?;
-                            Some(project.update(cx, |project, cx| {
-                                project.inlay_hints(buffer, range_to_query, cx)
-                            }))
-                        })
-                })
-                .ok()
-                .flatten();
-            anyhow::Ok(match task {
-                Some(task) => Some(task.await.context("inlays for buffer task")?),
-                None => None,
-            })
-        })
-    };
-
-    HintFetchTasks {
-        visible_range: (visible_range.clone(), query_task_for_range(visible_range)),
-        other_ranges: other_ranges
-            .into_iter()
-            .map(|range| (range.clone(), query_task_for_range(range)))
-            .collect(),
-    }
+struct HintFetchRanges {
+    visible_range: Range<language::Anchor>,
+    other_ranges: Vec<Range<language::Anchor>>,
 }
 
 fn contains_position(