Query less inlay hints (#2842)

Part of
https://linear.app/zed-industries/issue/Z-2750/investigate-performance-of-collaborating-on-large-files-with-inlay

Instead of querying the entire file for hints, query visible editor(s)
range + the areas above and below, of the same height.
Non-invalidating future queries (e.g. scrolling) query only missing
parts of the ranges.

Release Notes:

- Improved LSP resource usage by querying less hints for big files

crates/collab/src/tests/integration_tests.rs

@@ -7953,7 +7953,8 @@ async fn test_mutual_editor_inlay_hint_cache_update(
         );
         let inlay_cache = editor.inlay_hint_cache();
         assert_eq!(
-            inlay_cache.version, edits_made,
+            inlay_cache.version(),
+            edits_made,
             "Host editor update the cache version after every cache/view change",
         );
     });
@@ -7976,7 +7977,8 @@ async fn test_mutual_editor_inlay_hint_cache_update(
         );
         let inlay_cache = editor.inlay_hint_cache();
         assert_eq!(
-            inlay_cache.version, edits_made,
+            inlay_cache.version(),
+            edits_made,
             "Guest editor update the cache version after every cache/view change"
         );
     });
@@ -7996,7 +7998,7 @@ async fn test_mutual_editor_inlay_hint_cache_update(
             "Host should get hints from the 1st edit and 1st LSP query"
         );
         let inlay_cache = editor.inlay_hint_cache();
-        assert_eq!(inlay_cache.version, edits_made);
+        assert_eq!(inlay_cache.version(), edits_made);
     });
     editor_b.update(cx_b, |editor, _| {
         assert_eq!(
@@ -8010,7 +8012,7 @@ async fn test_mutual_editor_inlay_hint_cache_update(
             "Guest should get hints the 1st edit and 2nd LSP query"
         );
         let inlay_cache = editor.inlay_hint_cache();
-        assert_eq!(inlay_cache.version, edits_made);
+        assert_eq!(inlay_cache.version(), edits_made);
     });
 
     editor_a.update(cx_a, |editor, cx| {
@@ -8035,7 +8037,7 @@ async fn test_mutual_editor_inlay_hint_cache_update(
 4th query was made by guest (but not applied) due to cache invalidation logic"
         );
         let inlay_cache = editor.inlay_hint_cache();
-        assert_eq!(inlay_cache.version, edits_made);
+        assert_eq!(inlay_cache.version(), edits_made);
     });
     editor_b.update(cx_b, |editor, _| {
         assert_eq!(
@@ -8051,7 +8053,7 @@ async fn test_mutual_editor_inlay_hint_cache_update(
             "Guest should get hints from 3rd edit, 6th LSP query"
         );
         let inlay_cache = editor.inlay_hint_cache();
-        assert_eq!(inlay_cache.version, edits_made);
+        assert_eq!(inlay_cache.version(), edits_made);
     });
 
     fake_language_server
@@ -8077,7 +8079,8 @@ async fn test_mutual_editor_inlay_hint_cache_update(
         );
         let inlay_cache = editor.inlay_hint_cache();
         assert_eq!(
-            inlay_cache.version, edits_made,
+            inlay_cache.version(),
+            edits_made,
             "Host should accepted all edits and bump its cache version every time"
         );
     });
@@ -8098,7 +8101,7 @@ async fn test_mutual_editor_inlay_hint_cache_update(
         );
         let inlay_cache = editor.inlay_hint_cache();
         assert_eq!(
-            inlay_cache.version,
+            inlay_cache.version(),
             edits_made,
             "Guest should accepted all edits and bump its cache version every time"
         );
@@ -8264,7 +8267,8 @@ async fn test_inlay_hint_refresh_is_forwarded(
         );
         let inlay_cache = editor.inlay_hint_cache();
         assert_eq!(
-            inlay_cache.version, 0,
+            inlay_cache.version(),
+            0,
             "Host should not increment its cache version due to no changes",
         );
     });
@@ -8279,7 +8283,8 @@ async fn test_inlay_hint_refresh_is_forwarded(
         );
         let inlay_cache = editor.inlay_hint_cache();
         assert_eq!(
-            inlay_cache.version, edits_made,
+            inlay_cache.version(),
+            edits_made,
             "Guest editor update the cache version after every cache/view change"
         );
     });
@@ -8296,7 +8301,8 @@ async fn test_inlay_hint_refresh_is_forwarded(
         );
         let inlay_cache = editor.inlay_hint_cache();
         assert_eq!(
-            inlay_cache.version, 0,
+            inlay_cache.version(),
+            0,
             "Host should not increment its cache version due to no changes",
         );
     });
@@ -8311,7 +8317,8 @@ async fn test_inlay_hint_refresh_is_forwarded(
         );
         let inlay_cache = editor.inlay_hint_cache();
         assert_eq!(
-            inlay_cache.version, edits_made,
+            inlay_cache.version(),
+            edits_made,
             "Guest should accepted all edits and bump its cache version every time"
         );
     });
@@ -8343,13 +8350,10 @@ fn room_participants(room: &ModelHandle<Room>, cx: &mut TestAppContext) -> RoomP
 
 fn extract_hint_labels(editor: &Editor) -> Vec<String> {
     let mut labels = Vec::new();
-    for (_, excerpt_hints) in &editor.inlay_hint_cache().hints {
-        let excerpt_hints = excerpt_hints.read();
-        for (_, inlay) in excerpt_hints.hints.iter() {
-            match &inlay.label {
-                project::InlayHintLabel::String(s) => labels.push(s.to_string()),
-                _ => unreachable!(),
-            }
+    for hint in editor.inlay_hint_cache().hints() {
+        match hint.label {
+            project::InlayHintLabel::String(s) => labels.push(s),
+            _ => unreachable!(),
         }
     }
     labels

crates/editor/src/editor.rs

@@ -2723,7 +2723,7 @@ impl Editor {
             .collect()
     }
 
-    fn excerpt_visible_offsets(
+    pub fn excerpt_visible_offsets(
         &self,
         restrict_to_languages: Option<&HashSet<Arc<Language>>>,
         cx: &mut ViewContext<'_, '_, Editor>,

crates/editor/src/scroll.rs

@@ -13,7 +13,7 @@ use gpui::{
 };
 use language::{Bias, Point};
 use util::ResultExt;
-use workspace::{item::Item, WorkspaceId};
+use workspace::WorkspaceId;
 
 use crate::{
     display_map::{DisplaySnapshot, ToDisplayPoint},
@@ -333,9 +333,7 @@ impl Editor {
             cx,
         );
 
-        if !self.is_singleton(cx) {
-            self.refresh_inlays(InlayRefreshReason::NewLinesShown, cx);
-        }
+        self.refresh_inlays(InlayRefreshReason::NewLinesShown, cx);
     }
 
     pub fn scroll_position(&self, cx: &mut ViewContext<Self>) -> Vector2F {