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bower_components/neon-animation/neon-shared-element-animation-behavior.html 2.11 KB
73bcce88   luigser   COMPONENTS
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  <!--
  @license
  Copyright (c) 2015 The Polymer Project Authors. All rights reserved.
  This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
  The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
  The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
  Code distributed by Google as part of the polymer project is also
  subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
  -->
  
  <link rel="import" href="../polymer/polymer.html">
  <link rel="import" href="neon-animation-behavior.html">
  
  <script>
  
    /**
     * Use `Polymer.NeonSharedElementAnimationBehavior` to implement shared element animations.
     * @polymerBehavior Polymer.NeonSharedElementAnimationBehavior
     */
    Polymer.NeonSharedElementAnimationBehaviorImpl = {
  
      properties: {
  
        /**
         * Cached copy of shared elements.
         */
        sharedElements: {
          type: Object
        }
  
      },
  
      /**
       * Finds shared elements based on `config`.
       */
      findSharedElements: function(config) {
        var fromPage = config.fromPage;
        var toPage = config.toPage;
        if (!fromPage || !toPage) {
          console.warn(this.is + ':', !fromPage ? 'fromPage' : 'toPage', 'is undefined!');
          return null;
        };
  
        if (!fromPage.sharedElements || !toPage.sharedElements) {
          console.warn(this.is + ':', 'sharedElements are undefined for', !fromPage.sharedElements ? fromPage : toPage);
          return null;
        };
  
        var from = fromPage.sharedElements[config.id]
        var to = toPage.sharedElements[config.id];
  
        if (!from || !to) {
          console.warn(this.is + ':', 'sharedElement with id', config.id, 'not found in', !from ? fromPage : toPage);
          return null;
        }
  
        this.sharedElements = {
          from: from,
          to: to
        };
        return this.sharedElements;
      }
  
    };
  
    /** @polymerBehavior Polymer.NeonSharedElementAnimationBehavior */
    Polymer.NeonSharedElementAnimationBehavior = [
      Polymer.NeonAnimationBehavior,
      Polymer.NeonSharedElementAnimationBehaviorImpl
    ];
  
  </script>