vmes-flowable/diagram-js/lib/features/auto-resize/AutoResizeProvider.js

ceshibao

import RuleProvider from '../rules/RuleProvider';

import inherits from 'inherits';

/**
 * This is a base rule provider for the element.autoResize rule.
 */
export default function AutoResizeProvider(eventBus) {

  RuleProvider.call(this, eventBus);

  var self = this;

  this.addRule('element.autoResize', function(context) {
    return self.canResize(context.elements, context.target);
  });
}

AutoResizeProvider.$inject = [ 'eventBus' ];

inherits(AutoResizeProvider, RuleProvider);

/**
 * Needs to be implemented by sub classes to allow actual auto resize
 *
 * @param  {Array<djs.model.Shape>} elements
 * @param  {djs.model.Shape} target
 *
 * @return {boolean}
 */
AutoResizeProvider.prototype.canResize = function(elements, target) {
  return false;
};