editor: Toggle diff hunks WIP

crates/buffer_diff/src/buffer_diff.rs

@@ -616,11 +616,13 @@ impl BufferDiffInner {
         secondary: Option<&'a Self>,
     ) -> impl 'a + Iterator<Item = DiffHunk> {
         let range = range.to_offset(buffer);
+        println!("  >>> range = {range:?}");
 
         let mut cursor = self
             .hunks
             .filter::<_, DiffHunkSummary>(buffer, move |summary| {
                 let summary_range = summary.buffer_range.to_offset(buffer);
+                println!("  >>> summary_range = {:?}", summary_range);
                 let before_start = summary_range.end < range.start;
                 let after_end = summary_range.start > range.end;
                 !before_start && !after_end

crates/editor/src/editor.rs

@@ -20094,8 +20094,10 @@ impl Editor {
         ranges: Vec<Range<Anchor>>,
         cx: &mut Context<Editor>,
     ) {
+        println!("\n\nin toggle_diff_hunks_in_ranges");
         self.buffer.update(cx, |buffer, cx| {
             let expand = !buffer.has_expanded_diff_hunks_in_ranges(&ranges, cx);
+            println!("expand={expand}\n\n");
             buffer.expand_or_collapse_diff_hunks(ranges, expand, cx);
         })
     }

crates/editor/src/editor_tests.rs

@@ -29335,3 +29335,190 @@ async fn test_find_references_single_case(cx: &mut TestAppContext) {
 
     cx.assert_editor_state(after);
 }
+
+#[gpui::test]
+async fn test_toggle_selected_diff_hunks_neighbor(
+    executor: BackgroundExecutor,
+    cx: &mut TestAppContext,
+) {
+    init_test(cx, |_| {});
+
+    let mut cx = EditorTestContext::new(cx).await;
+
+    let diff_base = r#"
+        line0
+        lineA
+        lineB
+        lineC
+        lineD
+        "#
+    .unindent();
+
+    cx.set_state(
+        &r#"
+        line0
+        ˇlineA1
+        lineB
+        lineD
+        "#
+        .unindent(),
+    );
+    cx.set_head_text(&diff_base);
+    executor.run_until_parked();
+
+    cx.update_editor(|editor, window, cx| {
+        editor.toggle_selected_diff_hunks(&ToggleSelectedDiffHunks, window, cx);
+    });
+    executor.run_until_parked();
+    cx.assert_state_with_diff(
+        r#"
+          line0
+        - lineA
+        + ˇlineA1
+          lineB
+          lineD
+        "#
+        .unindent(),
+    );
+
+    cx.update_editor(|editor, window, cx| {
+        editor.move_down(&MoveDown, window, cx);
+        editor.move_right(&MoveRight, window, cx);
+        editor.toggle_selected_diff_hunks(&ToggleSelectedDiffHunks, window, cx);
+    });
+    executor.run_until_parked();
+    cx.assert_state_with_diff(
+        r#"
+          line0
+        - lineA
+        + lineA1
+          lˇineB
+        - lineC
+          lineD
+        "#
+        .unindent(),
+    );
+
+    cx.update_editor(|editor, window, cx| {
+        editor.toggle_selected_diff_hunks(&ToggleSelectedDiffHunks, window, cx);
+    });
+    executor.run_until_parked();
+    cx.assert_state_with_diff(
+        r#"
+          line0
+        - lineA
+        + lineA1
+          lˇineB
+          lineD
+        "#
+        .unindent(),
+    );
+
+    cx.update_editor(|editor, window, cx| {
+        editor.move_up(&MoveUp, window, cx);
+        editor.toggle_selected_diff_hunks(&ToggleSelectedDiffHunks, window, cx);
+    });
+    executor.run_until_parked();
+    cx.assert_state_with_diff(
+        r#"
+          line0
+          lˇineA1
+          lineB
+          lineD
+        "#
+        .unindent(),
+    );
+}
+
+#[gpui::test]
+async fn test_toggle_selected_diff_hunks_neighbor_edge_case(
+    executor: BackgroundExecutor,
+    cx: &mut TestAppContext,
+) {
+    init_test(cx, |_| {});
+
+    let mut cx = EditorTestContext::new(cx).await;
+
+    let diff_base = r#"
+        line0
+        lineA
+        lineB
+        lineC
+        lineD
+        "#
+    .unindent();
+
+    cx.set_state(
+        &r#"
+        line0
+        ˇlineA1
+        lineB
+        lineD
+        "#
+        .unindent(),
+    );
+    cx.set_head_text(&diff_base);
+    executor.run_until_parked();
+
+    cx.update_editor(|editor, window, cx| {
+        editor.toggle_selected_diff_hunks(&ToggleSelectedDiffHunks, window, cx);
+    });
+    executor.run_until_parked();
+    cx.assert_state_with_diff(
+        r#"
+          line0
+        - lineA
+        + ˇlineA1
+          lineB
+          lineD
+        "#
+        .unindent(),
+    );
+
+    cx.update_editor(|editor, window, cx| {
+        editor.move_down(&MoveDown, window, cx);
+        editor.toggle_selected_diff_hunks(&ToggleSelectedDiffHunks, window, cx);
+    });
+    executor.run_until_parked();
+    cx.assert_state_with_diff(
+        r#"
+          line0
+        - lineA
+        + lineA1
+          ˇlineB
+        - lineC
+          lineD
+        "#
+        .unindent(),
+    );
+
+    cx.update_editor(|editor, window, cx| {
+        editor.toggle_selected_diff_hunks(&ToggleSelectedDiffHunks, window, cx);
+    });
+    executor.run_until_parked();
+    cx.assert_state_with_diff(
+        r#"
+          line0
+        - lineA
+        + lineA1
+          ˇlineB
+          lineD
+        "#
+        .unindent(),
+    );
+
+    cx.update_editor(|editor, window, cx| {
+        editor.move_up(&MoveUp, window, cx);
+        editor.toggle_selected_diff_hunks(&ToggleSelectedDiffHunks, window, cx);
+    });
+    executor.run_until_parked();
+    cx.assert_state_with_diff(
+        r#"
+          line0
+          ˇlineA1
+          lineB
+          lineD
+        "#
+        .unindent(),
+    );
+}

crates/multi_buffer/src/multi_buffer.rs

@@ -2606,19 +2606,41 @@ impl MultiBuffer {
 
     pub fn has_expanded_diff_hunks_in_ranges(&self, ranges: &[Range<Anchor>], cx: &App) -> bool {
         let snapshot = self.read(cx);
+        print!("[ ");
+        for range in ranges {
+            let range = range.to_point(&snapshot);
+            print!("{range:?}, ");
+        }
+        println!(" ]");
+        let mut cursor = snapshot.diff_transforms.cursor::<MultiBufferOffset>(());
+        cursor.next();
+        println!("{{ ");
+        while let Some(item) = cursor.item() {
+            if let Some(hunk_info) = item.hunk_info() {
+                println!("  {:?}-{:?} {hunk_info:?}, ", cursor.start(), cursor.end());
+            } else {
+                println!("  {:?}-{:?}, ", cursor.start(), cursor.end());
+            }
+            cursor.next();
+        }
+        println!("}}");
         let mut cursor = snapshot.diff_transforms.cursor::<MultiBufferOffset>(());
         for range in ranges {
             let range = range.to_point(&snapshot);
             let start = snapshot.point_to_offset(Point::new(range.start.row, 0));
             let end = snapshot.point_to_offset(Point::new(range.end.row + 1, 0));
-            let start = start.saturating_sub_usize(1);
-            let end = snapshot.len().min(end + 1usize);
-            cursor.seek(&start, Bias::Right);
+            let new_start = start.saturating_sub_usize(0);
+            let new_end = snapshot.len().min(end);
+            println!("TRYING {range:?} ({start:?}-{end:?}) => ({new_start:?}-{new_end:?})");
+            cursor.seek(&new_start, Bias::Right);
             while let Some(item) = cursor.item() {
-                if *cursor.start() >= end {
+                println!("  ?? {:?}-{:?}", cursor.start(), cursor.end());
+                if *cursor.start() > new_end {
+                    println!("    BREAK");
                     break;
                 }
                 if item.hunk_info().is_some() {
+                    println!("    HIT");
                     return true;
                 }
                 cursor.next();
@@ -2634,6 +2656,7 @@ impl MultiBuffer {
         cx: &mut Context<Self>,
     ) {
         if self.snapshot.borrow().all_diff_hunks_expanded && !expand {
+            println!("early exit");
             return;
         }
         self.sync_mut(cx);
@@ -2642,6 +2665,7 @@ impl MultiBuffer {
         let mut last_hunk_row = None;
         for (range, end_excerpt_id) in ranges {
             for diff_hunk in snapshot.diff_hunks_in_range(range) {
+                println!("  >> {diff_hunk:?}");
                 if diff_hunk.excerpt_id.cmp(&end_excerpt_id, &snapshot).is_gt() {
                     continue;
                 }
@@ -3859,6 +3883,7 @@ impl MultiBufferSnapshot {
         range: Range<T>,
     ) -> impl Iterator<Item = MultiBufferDiffHunk> + '_ {
         let query_range = range.start.to_point(self)..range.end.to_point(self);
+        println!("query_range={query_range:?}");
         self.lift_buffer_metadata(query_range.clone(), move |buffer, buffer_range| {
             let diff = self.diffs.get(&buffer.remote_id())?;
             let buffer_start = buffer.anchor_before(buffer_range.start);
@@ -3874,6 +3899,7 @@ impl MultiBufferSnapshot {
             )
         })
         .filter_map(move |(range, hunk, excerpt)| {
+            println!("  -> range={range:?}");
             if range.start != range.end && range.end == query_range.start && !hunk.range.is_empty()
             {
                 return None;