Refactor multibuffer methods for multibuffer range -> buffer range

* Renames `excerpts_for_ranges` to `disjoint_ranges_to_buffer_ranges`,
and modifies it to return `MultiBufferExcerpt` since it provides more
information and was already being built.

* `range_to_buffer_ranges` now returns an iterator, should improve
efficiency in a few places.  Now implemented by just calling
`disjoint_ranges_to_buffer_ranges`.

crates/assistant/src/inline_assistant.rs

@@ -228,19 +228,20 @@ impl InlineAssistant {
         let newest_selection = newest_selection.unwrap();
 
         let mut codegen_ranges = Vec::new();
-        for (excerpt_id, buffer, buffer_range) in
-            snapshot.excerpts_in_ranges(selections.iter().map(|selection| {
+        for (excerpt, buffer_range) in
+            snapshot.disjoint_ranges_to_buffer_ranges(selections.iter().map(|selection| {
                 snapshot.anchor_before(selection.start)..snapshot.anchor_after(selection.end)
             }))
         {
+            let buffer = excerpt.buffer();
             let start = Anchor {
                 buffer_id: Some(buffer.remote_id()),
-                excerpt_id,
+                excerpt_id: excerpt.id(),
                 text_anchor: buffer.anchor_before(buffer_range.start),
             };
             let end = Anchor {
                 buffer_id: Some(buffer.remote_id()),
-                excerpt_id,
+                excerpt_id: excerpt.id(),
                 text_anchor: buffer.anchor_after(buffer_range.end),
             };
             codegen_ranges.push(start..end);
@@ -798,9 +799,10 @@ impl InlineAssistant {
                 let language_name = assist.editor.upgrade().and_then(|editor| {
                     let multibuffer = editor.read(cx).buffer().read(cx);
                     let multibuffer_snapshot = multibuffer.snapshot(cx);
-                    let ranges = multibuffer_snapshot.range_to_buffer_ranges(assist.range.clone());
+                    let mut ranges =
+                        multibuffer_snapshot.range_to_buffer_ranges(assist.range.clone());
                     ranges
-                        .first()
+                        .next()
                         .and_then(|(excerpt, _)| excerpt.buffer().language())
                         .map(|language| language.name())
                 });
@@ -2625,9 +2627,10 @@ impl CodegenAlternative {
     ) -> Self {
         let snapshot = multi_buffer.read(cx).snapshot(cx);
 
+        // TODO: Could be made more efficient by using a reverse iterator.
         let (old_excerpt, _) = snapshot
             .range_to_buffer_ranges(range.clone())
-            .pop()
+            .last()
             .unwrap();
         let old_buffer = cx.new_model(|cx| {
             let text = old_excerpt.buffer().as_rope().clone();
@@ -2872,9 +2875,9 @@ impl CodegenAlternative {
         let language_name = {
             let multibuffer = self.buffer.read(cx);
             let snapshot = multibuffer.snapshot(cx);
-            let ranges = snapshot.range_to_buffer_ranges(self.range.clone());
+            let mut ranges = snapshot.range_to_buffer_ranges(self.range.clone());
             ranges
-                .first()
+                .next()
                 .and_then(|(excerpt, _)| excerpt.buffer().language())
                 .map(|language| language.name())
         };

crates/assistant2/src/buffer_codegen.rs

@@ -257,9 +257,10 @@ impl CodegenAlternative {
     ) -> Self {
         let snapshot = buffer.read(cx).snapshot(cx);
 
+        // TODO: Could be more efficient by using a reverse iterator.
         let (old_excerpt, _) = snapshot
             .range_to_buffer_ranges(range.clone())
-            .pop()
+            .last()
             .unwrap();
         let old_buffer = cx.new_model(|cx| {
             let text = old_excerpt.buffer().as_rope().clone();
@@ -475,9 +476,9 @@ impl CodegenAlternative {
         let language_name = {
             let multibuffer = self.buffer.read(cx);
             let snapshot = multibuffer.snapshot(cx);
-            let ranges = snapshot.range_to_buffer_ranges(self.range.clone());
+            let mut ranges = snapshot.range_to_buffer_ranges(self.range.clone());
             ranges
-                .first()
+                .next()
                 .and_then(|(excerpt, _)| excerpt.buffer().language())
                 .map(|language| language.name())
         };

crates/assistant2/src/inline_assistant.rs

@@ -294,19 +294,20 @@ impl InlineAssistant {
         let newest_selection = newest_selection.unwrap();
 
         let mut codegen_ranges = Vec::new();
-        for (excerpt_id, buffer, buffer_range) in
-            snapshot.excerpts_in_ranges(selections.iter().map(|selection| {
+        for (excerpt, buffer_range) in
+            snapshot.disjoint_ranges_to_buffer_ranges(selections.iter().map(|selection| {
                 snapshot.anchor_before(selection.start)..snapshot.anchor_after(selection.end)
             }))
         {
+            let buffer = excerpt.buffer();
             let start = Anchor {
                 buffer_id: Some(buffer.remote_id()),
-                excerpt_id,
+                excerpt_id: excerpt.id(),
                 text_anchor: buffer.anchor_before(buffer_range.start),
             };
             let end = Anchor {
                 buffer_id: Some(buffer.remote_id()),
-                excerpt_id,
+                excerpt_id: excerpt.id(),
                 text_anchor: buffer.anchor_after(buffer_range.end),
             };
             codegen_ranges.push(start..end);
@@ -872,9 +873,9 @@ impl InlineAssistant {
                 let language_name = assist.editor.upgrade().and_then(|editor| {
                     let multibuffer = editor.read(cx).buffer().read(cx);
                     let snapshot = multibuffer.snapshot(cx);
-                    let ranges = snapshot.range_to_buffer_ranges(assist.range.clone());
+                    let mut ranges = snapshot.range_to_buffer_ranges(assist.range.clone());
                     ranges
-                        .first()
+                        .next()
                         .and_then(|(excerpt, _)| excerpt.buffer().language())
                         .map(|language| language.name())
                 });

crates/editor/src/editor.rs

@@ -109,7 +109,7 @@ pub use proposed_changes_editor::{
     ProposedChangeLocation, ProposedChangesEditor, ProposedChangesEditorToolbar,
 };
 use similar::{ChangeTag, TextDiff};
-use std::iter::Peekable;
+use std::iter::{self, Peekable};
 use task::{ResolvedTask, TaskTemplate, TaskVariables};
 
 use hover_links::{find_file, HoverLink, HoveredLinkState, InlayHighlight};
@@ -3550,8 +3550,7 @@ impl Editor {
         );
         let multi_buffer_visible_range = multi_buffer_visible_start..multi_buffer_visible_end;
         multi_buffer_snapshot
-            .range_to_buffer_ranges(multi_buffer_visible_range)
-            .into_iter()
+            .disjoint_ranges_to_buffer_ranges(iter::once(multi_buffer_visible_range))
             .filter(|(_, excerpt_visible_range)| !excerpt_visible_range.is_empty())
             .filter_map(|(excerpt, excerpt_visible_range)| {
                 let buffer_file = project::File::from_dyn(excerpt.buffer().file())?;
@@ -10498,13 +10497,13 @@ impl Editor {
         } else {
             let multi_buffer_snapshot = self.buffer.read(cx).snapshot(cx);
             let mut toggled_buffers = HashSet::default();
-            for (_, buffer_snapshot, _) in multi_buffer_snapshot.excerpts_in_ranges(
+            for (excerpt, _) in multi_buffer_snapshot.disjoint_ranges_to_buffer_ranges(
                 self.selections
                     .disjoint_anchors()
                     .into_iter()
                     .map(|selection| selection.range()),
             ) {
-                let buffer_id = buffer_snapshot.remote_id();
+                let buffer_id = excerpt.buffer().remote_id();
                 if toggled_buffers.insert(buffer_id) {
                     if self.buffer_folded(buffer_id, cx) {
                         self.unfold_buffer(buffer_id, cx);
@@ -10584,13 +10583,13 @@ impl Editor {
         } else {
             let multi_buffer_snapshot = self.buffer.read(cx).snapshot(cx);
             let mut folded_buffers = HashSet::default();
-            for (_, buffer_snapshot, _) in multi_buffer_snapshot.excerpts_in_ranges(
+            for (excerpt, _) in multi_buffer_snapshot.disjoint_ranges_to_buffer_ranges(
                 self.selections
                     .disjoint_anchors()
                     .into_iter()
                     .map(|selection| selection.range()),
             ) {
-                let buffer_id = buffer_snapshot.remote_id();
+                let buffer_id = excerpt.buffer().remote_id();
                 if folded_buffers.insert(buffer_id) {
                     self.fold_buffer(buffer_id, cx);
                 }
@@ -10750,13 +10749,13 @@ impl Editor {
         } else {
             let multi_buffer_snapshot = self.buffer.read(cx).snapshot(cx);
             let mut unfolded_buffers = HashSet::default();
-            for (_, buffer_snapshot, _) in multi_buffer_snapshot.excerpts_in_ranges(
+            for (excerpt, _) in multi_buffer_snapshot.disjoint_ranges_to_buffer_ranges(
                 self.selections
                     .disjoint_anchors()
                     .into_iter()
                     .map(|selection| selection.range()),
             ) {
-                let buffer_id = buffer_snapshot.remote_id();
+                let buffer_id = excerpt.buffer().remote_id();
                 if unfolded_buffers.insert(buffer_id) {
                     self.unfold_buffer(buffer_id, cx);
                 }
@@ -11500,36 +11499,36 @@ impl Editor {
     }
 
     fn get_permalink_to_line(&mut self, cx: &mut ViewContext<Self>) -> Task<Result<url::Url>> {
-        let buffer_and_selection = maybe!({
-            let selection = self.selections.newest::<Point>(cx);
+        let buffer_and_selection_rows = maybe!({
+            let multi_buffer = self.buffer().read(cx);
+            let multi_buffer_snapshot = multi_buffer.snapshot(cx);
+            let selection = self.selections.newest_anchor();
             let selection_range = selection.range();
 
-            let (buffer, selection) = if let Some(buffer) = self.buffer().read(cx).as_singleton() {
-                (buffer, selection_range.start.row..selection_range.end.row)
+            let (buffer, selection_rows) = if let Some(buffer) = multi_buffer.as_singleton() {
+                (
+                    buffer,
+                    selection_range.start.to_point(&multi_buffer_snapshot).row
+                        ..selection_range.end.to_point(&multi_buffer_snapshot).row,
+                )
             } else {
-                let multi_buffer = self.buffer().read(cx);
-                let multi_buffer_snapshot = multi_buffer.snapshot(cx);
-                let buffer_ranges = multi_buffer_snapshot.range_to_buffer_ranges(selection_range);
-
-                let (excerpt, range) = if selection.reversed {
-                    buffer_ranges.first()
-                } else {
-                    buffer_ranges.last()
-                }?;
-
+                let selection_head = selection.head();
+                let excerpt =
+                    multi_buffer_snapshot.excerpt_containing(selection_head..selection_head)?;
+                let range =
+                    excerpt.map_range_to_buffer(selection_range.to_offset(&multi_buffer_snapshot));
                 let snapshot = excerpt.buffer();
-                let selection = text::ToPoint::to_point(&range.start, &snapshot).row
-                    ..text::ToPoint::to_point(&range.end, &snapshot).row;
                 (
                     multi_buffer.buffer(excerpt.buffer_id()).unwrap().clone(),
-                    selection,
+                    text::ToPoint::to_point(&range.start, &snapshot).row
+                        ..text::ToPoint::to_point(&range.end, &snapshot).row,
                 )
             };
 
-            Some((buffer, selection))
+            Some((buffer, selection_rows))
         });
 
-        let Some((buffer, selection)) = buffer_and_selection else {
+        let Some((buffer, selection_rows)) = buffer_and_selection_rows else {
             return Task::ready(Err(anyhow!("failed to determine buffer and selection")));
         };
 
@@ -11538,7 +11537,7 @@ impl Editor {
         };
 
         project.update(cx, |project, cx| {
-            project.get_permalink_to_line(&buffer, selection, cx)
+            project.get_permalink_to_line(&buffer, selection_rows, cx)
         })
     }
 

crates/editor/src/hunk_diff.rs

@@ -458,10 +458,7 @@ impl Editor {
     ) -> Option<()> {
         let multi_buffer = self.buffer.read(cx);
         let multi_buffer_snapshot = multi_buffer.snapshot(cx);
-        let (excerpt, range) = multi_buffer_snapshot
-            .range_to_buffer_ranges(range)
-            .into_iter()
-            .next()?;
+        let (excerpt, range) = multi_buffer_snapshot.range_to_buffer_ranges(range).next()?;
 
         multi_buffer
             .buffer(excerpt.buffer_id())

crates/editor/src/items.rs

@@ -1468,10 +1468,11 @@ impl SearchableItem for Editor {
                     search_within_ranges
                 };
 
-                for (excerpt_id, search_buffer, search_range) in
-                    buffer.excerpts_in_ranges(search_within_ranges)
+                for (excerpt, search_range) in
+                    buffer.disjoint_ranges_to_buffer_ranges(search_within_ranges)
                 {
                     if !search_range.is_empty() {
+                        let search_buffer = excerpt.buffer();
                         ranges.extend(
                             query
                                 .search(search_buffer, Some(search_range.clone()))
@@ -1482,8 +1483,8 @@ impl SearchableItem for Editor {
                                         .anchor_after(search_range.start + match_range.start);
                                     let end = search_buffer
                                         .anchor_before(search_range.start + match_range.end);
-                                    buffer.anchor_in_excerpt(excerpt_id, start).unwrap()
-                                        ..buffer.anchor_in_excerpt(excerpt_id, end).unwrap()
+                                    buffer.anchor_in_excerpt(excerpt.id(), start).unwrap()
+                                        ..buffer.anchor_in_excerpt(excerpt.id(), end).unwrap()
                                 }),
                         );
                     }

crates/language_tools/src/syntax_tree_view.rs

@@ -132,12 +132,14 @@ impl SyntaxTreeView {
             .editor
             .update(cx, |editor, cx| editor.snapshot(cx));
         let (excerpt, buffer, range) = editor_state.editor.update(cx, |editor, cx| {
+            let selection = editor.selections.last::<usize>(cx);
             let selection_range = editor.selections.last::<usize>(cx).range();
+            let selection_head = selection.head();
             let multi_buffer = editor.buffer().read(cx);
-            let (excerpt, range) = snapshot
+            let excerpt = snapshot
                 .buffer_snapshot
-                .range_to_buffer_ranges(selection_range)
-                .pop()?;
+                .excerpt_containing(selection_head..selection_head)?;
+            let range = excerpt.map_range_to_buffer(selection_range);
             let buffer = multi_buffer.buffer(excerpt.buffer_id()).unwrap().clone();
             Some((excerpt, buffer, range))
         })?;

crates/multi_buffer/src/multi_buffer.rs

@@ -3894,7 +3894,7 @@ impl MultiBufferSnapshot {
     where
         T: 'a + ToOffset,
     {
-        let mut ranges = self.range_to_buffer_ranges(range);
+        let mut ranges = self.range_to_buffer_ranges(range).collect::<Vec<_>>();
         if reversed {
             ranges.reverse();
         }
@@ -4157,80 +4157,60 @@ impl MultiBufferSnapshot {
         })
     }
 
-    pub fn range_to_buffer_ranges<T: ToOffset>(
-        &self,
-        range: Range<T>,
-    ) -> Vec<(MultiBufferExcerpt<'_>, Range<usize>)> {
-        let start = range.start.to_offset(self);
-        let end = range.end.to_offset(self);
-
-        let mut result = Vec::new();
-        let mut cursor = self.excerpts.cursor::<(usize, Point)>(&());
-        cursor.seek(&start, Bias::Right, &());
-        if cursor.item().is_none() {
-            cursor.prev(&());
-        }
-
-        while let Some(excerpt) = cursor.item() {
-            if cursor.start().0 > end {
-                break;
-            }
-
-            let mut end_before_newline = cursor.end(&()).0;
-            if excerpt.has_trailing_newline {
-                end_before_newline -= 1;
-            }
-            let excerpt_start = excerpt.range.context.start.to_offset(&excerpt.buffer);
-            let start = excerpt_start + (cmp::max(start, cursor.start().0) - cursor.start().0);
-            let end = excerpt_start + (cmp::min(end, end_before_newline) - cursor.start().0);
-            result.push((
-                MultiBufferExcerpt::new(&excerpt, *cursor.start()),
-                start..end,
-            ));
-            cursor.next(&());
-        }
-
-        result
-    }
-
-    /// Returns excerpts overlapping the given ranges. If range spans multiple excerpts returns one range for each excerpt
+    /// Returns excerpts overlapping the given range. If range spans multiple excerpts returns one
+    /// range for each excerpt.
     ///
     /// The ranges are specified in the coordinate space of the multibuffer, not the individual excerpted buffers.
     /// Each returned excerpt's range is in the coordinate space of its source buffer.
-    pub fn excerpts_in_ranges(
+    pub fn range_to_buffer_ranges<T: ToOffset>(
         &self,
-        ranges: impl IntoIterator<Item = Range<Anchor>>,
-    ) -> impl Iterator<Item = (ExcerptId, &BufferSnapshot, Range<usize>)> {
-        let mut ranges = ranges.into_iter().map(|range| range.to_offset(self));
+        range: Range<T>,
+    ) -> impl Iterator<Item = (MultiBufferExcerpt<'_>, Range<usize>)> {
+        self.disjoint_ranges_to_buffer_ranges(iter::once(range))
+    }
+
+    /// Returns excerpts overlapping the given ranges, which must be disjoint and sorted by start position.
+    /// If range spans multiple excerpts returns one range for each excerpt
+    ///
+    /// The ranges are specified in the coordinate space of the multibuffer, not the individual excerpted buffers.
+    /// Each returned excerpt's range is in the coordinate space of its source buffer.
+    pub fn disjoint_ranges_to_buffer_ranges<T: ToOffset>(
+        &self,
+        ranges: impl IntoIterator<Item = Range<T>>,
+    ) -> impl Iterator<Item = (MultiBufferExcerpt<'_>, Range<usize>)> {
+        let mut ranges = ranges.into_iter();
         let mut cursor = self.excerpts.cursor::<(usize, Point)>(&());
         cursor.next(&());
         let mut current_range = ranges.next();
         iter::from_fn(move || {
-            let range = current_range.clone()?;
-            if range.start >= cursor.end(&()).0 {
-                cursor.seek_forward(&range.start, Bias::Right, &());
-                if range.start == self.len() {
+            let range = current_range.as_ref()?;
+            let start = range.start.to_offset(self);
+            let end = range.end.to_offset(self);
+            if start >= cursor.end(&()).0 {
+                cursor.seek_forward(&start, Bias::Right, &());
+                if start == self.len() {
                     cursor.prev(&());
                 }
             }
 
             let excerpt = cursor.item()?;
-            let range_start_in_excerpt = cmp::max(range.start, cursor.start().0);
+            let range_start_in_excerpt = cmp::max(start, cursor.start().0);
             let range_end_in_excerpt = if excerpt.has_trailing_newline {
-                cmp::min(range.end, cursor.end(&()).0 - 1)
+                cmp::min(end, cursor.end(&()).0 - 1)
             } else {
-                cmp::min(range.end, cursor.end(&()).0)
+                cmp::min(end, cursor.end(&()).0)
             };
-            let buffer_range = MultiBufferExcerpt::new(excerpt, *cursor.start())
+            let multi_buffer_excerpt = MultiBufferExcerpt::new(excerpt, *cursor.start());
+            let buffer_range = multi_buffer_excerpt
                 .map_range_to_buffer(range_start_in_excerpt..range_end_in_excerpt);
 
-            if range.end > cursor.end(&()).0 {
+            if end > cursor.end(&()).0 {
                 cursor.next(&());
             } else {
                 current_range = ranges.next();
             }
 
-            Some((excerpt.id, &excerpt.buffer, buffer_range))
+            Some((multi_buffer_excerpt, buffer_range))
         })
     }
 

crates/multi_buffer/src/multi_buffer_tests.rs

@@ -1235,7 +1235,9 @@ fn test_random_multibuffer(cx: &mut AppContext, mut rng: StdRng) {
             );
 
             let snapshot = multibuffer.read(cx).snapshot(cx);
-            let excerpted_buffer_ranges = snapshot.range_to_buffer_ranges(start_ix..end_ix);
+            let excerpted_buffer_ranges = snapshot
+                .range_to_buffer_ranges(start_ix..end_ix)
+                .collect::<Vec<_>>();
             let excerpted_buffers_text = excerpted_buffer_ranges
                 .iter()
                 .map(|(excerpt, buffer_range)| {
@@ -1488,7 +1490,7 @@ fn test_excerpts_in_ranges_no_ranges(cx: &mut AppContext) {
 
     let snapshot = multibuffer.update(cx, |multibuffer, cx| multibuffer.snapshot(cx));
 
-    let mut excerpts = snapshot.excerpts_in_ranges(iter::from_fn(|| None));
+    let mut excerpts = snapshot.disjoint_ranges_to_buffer_ranges::<usize>(iter::from_fn(|| None));
 
     assert!(excerpts.next().is_none());
 }
@@ -1587,12 +1589,12 @@ fn test_excerpts_in_ranges_range_inside_the_excerpt(cx: &mut AppContext) {
     )];
 
     let excerpts = snapshot
-        .excerpts_in_ranges(vec![range.clone()].into_iter())
-        .map(|(excerpt_id, buffer, actual_range)| {
+        .disjoint_ranges_to_buffer_ranges(vec![range.clone()].into_iter())
+        .map(|(excerpt, actual_range)| {
             (
-                excerpt_id,
-                buffer.remote_id(),
-                map_range_from_excerpt(&snapshot, excerpt_id, buffer, actual_range),
+                excerpt.id(),
+                excerpt.buffer().remote_id(),
+                map_range_from_excerpt(&snapshot, excerpt.id(), excerpt.buffer(), actual_range),
             )
         })
         .collect_vec();
@@ -1652,12 +1654,12 @@ fn test_excerpts_in_ranges_range_crosses_excerpts_boundary(cx: &mut AppContext)
     ];
 
     let excerpts = snapshot
-        .excerpts_in_ranges(vec![expected_range.clone()].into_iter())
-        .map(|(excerpt_id, buffer, actual_range)| {
+        .disjoint_ranges_to_buffer_ranges(vec![expected_range.clone()].into_iter())
+        .map(|(excerpt, actual_range)| {
             (
-                excerpt_id,
-                buffer.remote_id(),
-                map_range_from_excerpt(&snapshot, excerpt_id, buffer, actual_range),
+                excerpt.id(),
+                excerpt.buffer().remote_id(),
+                map_range_from_excerpt(&snapshot, excerpt.id(), excerpt.buffer(), actual_range),
             )
         })
         .collect_vec();
@@ -1728,12 +1730,12 @@ fn test_excerpts_in_ranges_range_encloses_excerpt(cx: &mut AppContext) {
     ];
 
     let excerpts = snapshot
-        .excerpts_in_ranges(vec![expected_range.clone()].into_iter())
-        .map(|(excerpt_id, buffer, actual_range)| {
+        .disjoint_ranges_to_buffer_ranges(vec![expected_range.clone()].into_iter())
+        .map(|(excerpt, actual_range)| {
             (
-                excerpt_id,
-                buffer.remote_id(),
-                map_range_from_excerpt(&snapshot, excerpt_id, buffer, actual_range),
+                excerpt.id(),
+                excerpt.buffer().remote_id(),
+                map_range_from_excerpt(&snapshot, excerpt.id(), excerpt.buffer(), actual_range),
             )
         })
         .collect_vec();
@@ -1794,12 +1796,12 @@ fn test_excerpts_in_ranges_multiple_ranges(cx: &mut AppContext) {
     });
 
     let excerpts = snapshot
-        .excerpts_in_ranges(ranges)
-        .map(|(excerpt_id, buffer, actual_range)| {
+        .disjoint_ranges_to_buffer_ranges(ranges)
+        .map(|(excerpt, actual_range)| {
             (
-                excerpt_id,
-                buffer.remote_id(),
-                map_range_from_excerpt(&snapshot, excerpt_id, buffer, actual_range),
+                excerpt.id(),
+                excerpt.buffer().remote_id(),
+                map_range_from_excerpt(&snapshot, excerpt.id(), excerpt.buffer(), actual_range),
             )
         })
         .collect_vec();
@@ -1860,12 +1862,12 @@ fn test_excerpts_in_ranges_range_ends_at_excerpt_end(cx: &mut AppContext) {
     ];
 
     let excerpts = snapshot
-        .excerpts_in_ranges(ranges.into_iter())
-        .map(|(excerpt_id, buffer, actual_range)| {
+        .disjoint_ranges_to_buffer_ranges(ranges.into_iter())
+        .map(|(excerpt, actual_range)| {
             (
-                excerpt_id,
-                buffer.remote_id(),
-                map_range_from_excerpt(&snapshot, excerpt_id, buffer, actual_range),
+                excerpt.id(),
+                excerpt.buffer().remote_id(),
+                map_range_from_excerpt(&snapshot, excerpt.id(), excerpt.buffer(), actual_range),
             )
         })
         .collect_vec();