dmn-js-drd/lib/features/keyboard/DrdKeyboardBindings.js

A decision requirements diagram view for dmn-js

import inherits from 'inherits-browser';
import KeyboardBindings from 'diagram-js/lib/features/keyboard/KeyboardBindings';

/**
 * DRD specific key bindings.
 *
 * @param {Keyboard} keyboard
 * @param {EditorActions} editorActions
 */
export default function DrdKeyboardBindings(injector) {
  injector.invoke(KeyboardBindings, this);
}
inherits(DrdKeyboardBindings, KeyboardBindings);
DrdKeyboardBindings.$inject = ['injector'];

/**
 * Register available keyboard bindings.
 *
 * @param {Keyboard} keyboard
 * @param {EditorActions} editorActions
 */
DrdKeyboardBindings.prototype.registerBindings = function (keyboard, editorActions) {
  // inherit default bindings
  KeyboardBindings.prototype.registerBindings.call(this, keyboard, editorActions);

  /**
   * Add keyboard binding if respective editor action
   * is registered.
   *
   * @param {string} action name
   * @param {Function} fn that implements the key binding
   */
  function addListener(action, fn) {
    if (editorActions.isRegistered(action)) {
      keyboard.addListener(fn);
    }
  }

  // select all elements
  // CTRL + A
  addListener('selectElements', function (context) {
    var event = context.keyEvent;
    if (keyboard.isKey(['a', 'A'], event) && keyboard.isCmd(event)) {
      editorActions.trigger('selectElements');
      return true;
    }
  });

  // activate lasso tool
  // L
  addListener('lassoTool', function (context) {
    var event = context.keyEvent;
    if (keyboard.hasModifier(event)) {
      return;
    }
    if (keyboard.isKey(['l', 'L'], event)) {
      editorActions.trigger('lassoTool');
      return true;
    }
  });

  // activate hand tool
  // H
  addListener('handTool', function (context) {
    var event = context.keyEvent;
    if (keyboard.hasModifier(event)) {
      return;
    }
    if (keyboard.isKey(['h', 'H'], event)) {
      editorActions.trigger('handTool');
      return true;
    }
  });

  // activate direct editing
  // E
  addListener('directEditing', function (context) {
    var event = context.keyEvent;
    if (keyboard.hasModifier(event)) {
      return;
    }
    if (keyboard.isKey(['e', 'E'], event)) {
      editorActions.trigger('directEditing');
      return true;
    }
  });

  // search labels
  // CTRL + F
  addListener('find', function (context) {
    var event = context.keyEvent;
    if (keyboard.isKey(['f', 'F'], event) && keyboard.isCmd(event)) {
      editorActions.trigger('find');
      return true;
    }
  });
};
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