Introduce a struct for spanned_rows result

Co-Authored-By: Antonio Scandurra <me@as-cii.com>

zed/src/editor/buffer/selection.rs

@@ -17,6 +17,11 @@ pub enum SelectionGoal {
     ColumnRange { start: u32, end: u32 },
 }
 
+pub struct SpannedRows {
+    pub buffer_rows: Range<u32>,
+    pub display_rows: Range<u32>,
+}
+
 #[derive(Clone, Debug, Eq, PartialEq)]
 pub struct Selection {
     pub id: usize,
@@ -93,7 +98,7 @@ impl Selection {
         &self,
         include_end_if_at_line_start: bool,
         map: &DisplayMapSnapshot,
-    ) -> (Range<u32>, Range<u32>) {
+    ) -> SpannedRows {
         let display_start = self.start.to_display_point(map, Bias::Left);
         let mut display_end = self.end.to_display_point(map, Bias::Right);
         if !include_end_if_at_line_start
@@ -107,9 +112,9 @@ impl Selection {
         let (display_start, buffer_start) = map.prev_row_boundary(display_start);
         let (display_end, buffer_end) = map.next_row_boundary(display_end);
 
-        (
-            buffer_start.row..buffer_end.row + 1,
-            display_start.row()..display_end.row() + 1,
-        )
+        SpannedRows {
+            buffer_rows: buffer_start.row..buffer_end.row + 1,
+            display_rows: display_start.row()..display_end.row() + 1,
+        }
     }
 }