Layout git gutters inclusively

crates/editor/src/element.rs

@@ -605,7 +605,7 @@ impl EditorElement {
 
                 //TODO: This rendering is entirely a horrible hack
                 DiffHunkStatus::Removed => {
-                    let row = display_row_range.start;
+                    let row = *display_row_range.start();
 
                     let offset = line_height / 2.;
                     let start_y = row as f32 * line_height - offset - scroll_top;
@@ -627,11 +627,11 @@ impl EditorElement {
                 }
             };
 
-            let start_row = display_row_range.start;
+            let start_row = *display_row_range.start();
-            let end_row = display_row_range.end;
+            let end_row = *display_row_range.end();
 
             let start_y = start_row as f32 * line_height - scroll_top;
-            let end_y = end_row as f32 * line_height - scroll_top;
+            let end_y = end_row as f32 * line_height - scroll_top + line_height;
 
             let width = diff_style.width_em * line_height;
             let highlight_origin = bounds.origin() + vec2f(-width, start_y);

crates/editor/src/git.rs

@@ -1,4 +1,4 @@
-use std::ops::Range;
+use std::ops::RangeInclusive;
 
 use git::diff::{DiffHunk, DiffHunkStatus};
 use language::Point;
@@ -15,7 +15,7 @@ pub enum DisplayDiffHunk {
     },
 
     Unfolded {
-        display_row_range: Range<u32>,
+        display_row_range: RangeInclusive<u32>,
         status: DiffHunkStatus,
     },
 }
@@ -26,7 +26,7 @@ impl DisplayDiffHunk {
             &DisplayDiffHunk::Folded { display_row } => display_row,
             DisplayDiffHunk::Unfolded {
                 display_row_range, ..
-            } => display_row_range.start,
+            } => *display_row_range.start(),
         }
     }
 
@@ -36,13 +36,7 @@ impl DisplayDiffHunk {
 
             DisplayDiffHunk::Unfolded {
                 display_row_range, ..
-            } => {
+            } => display_row_range.clone(),
-                if display_row_range.len() == 0 {
-                    display_row_range.start..=display_row_range.end
-                } else {
-                    display_row_range.start..=display_row_range.end - 1
-                }
-            }
         };
 
         range.contains(&display_row)
@@ -51,7 +45,6 @@ impl DisplayDiffHunk {
 
 pub fn diff_hunk_to_display(hunk: DiffHunk<u32>, snapshot: &DisplaySnapshot) -> DisplayDiffHunk {
     let hunk_start_point = Point::new(hunk.buffer_range.start, 0);
-    let hunk_end_point = Point::new(hunk.buffer_range.end, 0);
     let hunk_start_point_sub = Point::new(hunk.buffer_range.start.saturating_sub(1), 0);
     let hunk_end_point_sub = Point::new(
         hunk.buffer_range
@@ -83,9 +76,17 @@ pub fn diff_hunk_to_display(hunk: DiffHunk<u32>, snapshot: &DisplaySnapshot) ->
         DisplayDiffHunk::Folded { display_row: row }
     } else {
         let start = hunk_start_point.to_display_point(snapshot).row();
+
+        let hunk_end_row_inclusive = hunk
+            .buffer_range
+            .end
+            .saturating_sub(1)
+            .max(hunk.buffer_range.start);
+        let hunk_end_point = Point::new(hunk_end_row_inclusive, 0);
         let end = hunk_end_point.to_display_point(snapshot).row();
+
         DisplayDiffHunk::Unfolded {
-            display_row_range: start..end,
+            display_row_range: start..=end,
             status: hunk.status(),
         }
     }

crates/git/src/diff.rs

@@ -177,7 +177,7 @@ impl BufferDiff {
 
         let mut first_deletion_buffer_row: Option<u32> = None;
         let mut buffer_row_range: Option<Range<u32>> = None;
-        let mut head_byte_range: Option<Range<usize>> = None;
+        let mut diff_base_byte_range: Option<Range<usize>> = None;
 
         for line_index in 0..line_item_count {
             let line = patch.line_in_hunk(hunk_index, line_index).unwrap();
@@ -198,9 +198,9 @@ impl BufferDiff {
             if kind == GitDiffLineType::Deletion {
                 let end = content_offset + content_len;
 
-                match &mut head_byte_range {
+                match &mut diff_base_byte_range {
                     Some(head_byte_range) => head_byte_range.end = end as usize,
-                    None => head_byte_range = Some(content_offset as usize..end as usize),
+                    None => diff_base_byte_range = Some(content_offset as usize..end as usize),
                 }
 
                 if first_deletion_buffer_row.is_none() {
@@ -221,14 +221,14 @@ impl BufferDiff {
         });
 
         //unwrap_or addition without deletion
-        let head_byte_range = head_byte_range.unwrap_or(0..0);
+        let diff_base_byte_range = diff_base_byte_range.unwrap_or(0..0);
 
         let start = Point::new(buffer_row_range.start, 0);
         let end = Point::new(buffer_row_range.end, 0);
         let buffer_range = buffer.anchor_before(start)..buffer.anchor_before(end);
         DiffHunk {
             buffer_range,
-            diff_base_byte_range: head_byte_range,
+            diff_base_byte_range,
         }
     }
 }