@atlaskit/editor-plugin-block-menu/dist/es2019/pm-plugins/utils/shouldSuppressKeyboardEvent.js

BlockMenu plugin for @atlaskit/editor-core

/**
 * Determines whether keyboard events should be suppressed when the block menu is open.
 *
 * When the block menu is open, we want to block most keyboard events to prevent
 * unintended interactions. However, certain actions should still be allowed:
 * - Backspace/Delete: Allow deleting selected content
 * - Copy/Cut/Paste: Allow clipboard operations (Cmd/Ctrl+C, Cmd/Ctrl+X, Cmd/Ctrl+V)
 * - Undo/Redo: Allow undo/redo operations (Cmd/Ctrl+Z, Cmd/Ctrl+Y)
 * - Copy Link to Selection: Allow the keyboard shortcut (Cmd/Ctrl+Alt+A)
 *
 * @param event - The keyboard event to check
 * @returns true if the event should be suppressed, false if it should be allowed
 */
export const shouldSuppressKeyboardEvent = event => {
  const key = event.key.toLowerCase();
  const code = event.code.toLowerCase();
  const isMetaCtrl = event.metaKey || event.ctrlKey;
  const isAlt = event.altKey;

  // Check for allowed keyboard shortcuts
  const isBackspaceDelete = ['backspace', 'delete'].includes(key);
  const isCopyCutPaste = isMetaCtrl && ['c', 'x', 'v'].includes(key);
  const isUndoRedo = isMetaCtrl && ['z', 'y'].includes(key);

  // Use event.code to detect physical key 'A' because on macOS Option+A produces 'å'
  const isCopyLinkToBlock = isMetaCtrl && isAlt && code === 'keya';

  // Suppress all events except the allowed ones
  const suppressNativeHandling = !isCopyCutPaste && !isBackspaceDelete && !isUndoRedo && !isCopyLinkToBlock;
  return suppressNativeHandling;
};