feat: use two-column diagonal diff hatching (EXPERIMENT; DISCARDED)

src/tui.rs

@@ -3310,7 +3310,7 @@ fn draw_diff_pane(
             let buffer = frame.buffer_mut();
             for x in 0..content.width {
                 buffer[(content.x + x, row_area.y)]
-                    .set_symbol("╱")
+                    .set_symbol(["🯐", "🯑"][usize::from(x % 2)])
                     .set_style(style);
             }
             continue;
@@ -5353,7 +5353,7 @@ mod tests {
                             if scope == WhitespaceScope::All { 8 } else { 4 },
                         );
                         if mode == ViewMode::Split {
-                            assert!(buffer.content.iter().any(|cell| cell.symbol() == "╱"));
+                            assert!(buffer.content.iter().any(|cell| cell.symbol() == "🯐"));
                         }
                     }
                 }
@@ -6479,7 +6479,7 @@ mod tests {
                 pane_screen(&terminal, Rect::new(present.right() - 13, present.y, 12, 1),)
                     .contains(if added { "editable" } else { "read-only" })
             );
-            assert!(!text.contains('╱'));
+            assert!(!text.contains(['🯐', '🯑']));
         }
         let mut empty_added = deletion_file();
         empty_added.status = FileStatus::Added;
@@ -6541,7 +6541,7 @@ mod tests {
             .contains("old revision → Working checkout")
         );
         assert!(!text.contains("unchanged rename content"));
-        assert!(!text.contains('╱'));
+        assert!(!text.contains(['🯐', '🯑']));
 
         let mut modified = diff_comparison(vec![deletion_file()]);
         modified.files_visible = false;
@@ -6802,7 +6802,14 @@ mod tests {
         let gap_symbols: Vec<_> = (after.x + 1..after.right() - 1)
             .map(|x| {
                 let cell = &buffer[(x, y)];
-                assert_eq!(cell.symbol(), "╱");
+                assert_eq!(
+                    cell.symbol(),
+                    if (x - after.x - 1) % 2 == 0 {
+                        "🯐"
+                    } else {
+                        "🯑"
+                    }
+                );
                 assert_eq!(cell.bg, Color::Reset);
                 assert_eq!(cell.fg, buffer[(after.x + 1, y + 1)].fg);
                 cell.symbol().to_owned()
@@ -6858,7 +6865,14 @@ mod tests {
             let y = before.y + 1 + offset;
             for x in before.x + 1..before.right() - 1 {
                 let cell = &buffer[(x, y)];
-                assert_eq!(cell.symbol(), "╱");
+                assert_eq!(
+                    cell.symbol(),
+                    if (x - before.x - 1) % 2 == 0 {
+                        "🯐"
+                    } else {
+                        "🯑"
+                    }
+                );
                 assert_eq!(cell.bg, Color::Reset);
             }
             assert_eq!(buffer[(after.x + 1, y)].symbol(), (offset + 1).to_string());
@@ -6876,7 +6890,14 @@ mod tests {
         render_diff(&mut terminal, &diff, &mut panels);
         let buffer = terminal.backend().buffer();
         for x in before.x + 1..before.right() - 1 {
-            assert_eq!(buffer[(x, before.y + 1)].symbol(), "╱");
+            assert_eq!(
+                buffer[(x, before.y + 1)].symbol(),
+                if (x - before.x - 1) % 2 == 0 {
+                    "🯐"
+                } else {
+                    "🯑"
+                }
+            );
         }
         assert_eq!(buffer[(before.x, before.y + 1)].symbol(), "│");
         assert_eq!(buffer[(before.right() - 1, before.y + 1)].symbol(), "│");
@@ -10751,7 +10772,7 @@ end
                 vec!["3", "3", "end"]
             ]
         );
-        assert!(!lines.iter().any(|line| line.contains('╱')));
+        assert!(!lines.iter().any(|line| line.contains(['🯐', '🯑'])));
         editor.handle(Input::Char('\t'));
         render_native_diff(&mut terminal, &mut views, &mut editor);
         let geometry = views.panels.diff.as_ref().unwrap();