Add customized killLine behaviour

Useful for registering a visual-line-mode killLine for example.

Author: hrjakobsen

src/index.ts

@@ -720,11 +720,15 @@ EmacsHandler.addCommands({
     },
   },
   killLine: {
-    exec: function (handler: EmacsHandler) {
+    exec: function (handler: EmacsHandler, selectionCommand?: (view: EditorView) => any) {
       handler.pushEmacsMark(null);
       // don't delete the selection if it's before the cursor
       handler.clearSelection();
-      commands.selectLineEnd(handler.view);
+      if (selectionCommand) {
+        selectionCommand(handler.view);
+      } else {
+        commands.selectLineEnd(handler.view);
+      }
 
       var view = handler.view;
       var state = view.state