Added `ui.bufferline.marker` key to style the underflow and overflow markers

book/src/themes.md

@@ -293,8 +293,9 @@ These scopes are used for theming the editor interface:
 | `ui.statusline.select`            | Statusline mode during select mode ([only if `editor.color-modes` is enabled][editor-section]) |
 | `ui.statusline.separator`         | Separator character in statusline                                                              |
 | `ui.bufferline`                   | Style for the buffer line                                                                      |
-| `ui.bufferline.active`            | Style for the active buffer in buffer line                                                        |
+| `ui.bufferline.active`            | Style for the active buffer in buffer line                                                     |
 | `ui.bufferline.background`        | Style for bufferline background                                                                |
+| `ui.bufferline.marker`            | Style for bufferline underflow and overflow markers                                            |
 | `ui.popup`                        | Documentation popups (e.g. Space + k)                                                          |
 | `ui.popup.info`                   | Prompt for multiple key options                                                                |
 | `ui.window`                       | Borderlines separating splits                                                                  |

helix-term/src/ui/editor.rs

@@ -722,8 +722,8 @@ impl EditorView {
         // Add under and overflow markers.
         let markers = editor
             .theme
-            .try_get("ui.bufferline")
-            .unwrap_or_else(|| editor.theme.get("ui.bufferline.active"));
+            .try_get("ui.bufferline.marker")
+            .unwrap_or_else(|| editor.theme.get("ui.bufferline"));
 
         if mark_underflow {
             let _ = surface.set_string(viewport.left(), viewport.top(), " < ", markers);