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1<!--
2@license
3Copyright (c) 2015 The Polymer Project Authors. All rights reserved.
4This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
5The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
6The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
7Code distributed by Google as part of the polymer project is also
8subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
9-->
10
11<link rel="import" href="../../polymer/polymer.html">
12<link rel="import" href="../neon-shared-element-animation-behavior.html">
13<link rel="import" href="../web-animations.html">
14
15<!--
16`<ripple-animation>` scales and transform an element such that it appears to ripple from either
17a shared element, or from a screen position, to full screen.
18
19If using as a shared element animation in `<neon-animated-pages>`, use this animation in an `exit`
20animation in the source page and in an `entry` animation in the destination page. Also, define the
21hero elements in the `sharedElements` property (not a configuration property, see
22`Polymer.NeonSharedElementAnimatableBehavior`).
23
24If using a screen position, define the `gesture` property.
25
26Configuration:
27```
28{
29  name: 'ripple-animation`.
30  id: <shared-element-id>, /* set this or gesture */
31  gesture: {x: <page-x>, y: <page-y>}, /* set this or id */
32  timing: <animation-timing>,
33  toPage: <node>, /* define for the destination page */
34  fromPage: <node>, /* define for the source page */
35}
36```
37-->
38
39<script>
40
41  Polymer({
42
43    is: 'ripple-animation',
44
45    behaviors: [
46      Polymer.NeonSharedElementAnimationBehavior
47    ],
48
49    configure: function(config) {
50      var shared = this.findSharedElements(config);
51      if (!shared) {
52        return null;
53      }
54
55      var translateX, translateY;
56      var toRect = shared.to.getBoundingClientRect();
57      if (config.gesture) {
58        translateX = config.gesture.x - (toRect.left + (toRect.width / 2));
59        translateY = config.gesture.y - (toRect.top + (toRect.height / 2));
60      } else {
61        var fromRect = shared.from.getBoundingClientRect();
62        translateX = (fromRect.left + (fromRect.width / 2)) - (toRect.left + (toRect.width / 2));
63        translateY = (fromRect.top + (fromRect.height / 2)) - (toRect.top + (toRect.height / 2));
64      }
65      var translate = 'translate(' + translateX + 'px,' + translateY + 'px)';
66
67      var size = Math.max(toRect.width + Math.abs(translateX) * 2, toRect.height + Math.abs(translateY) * 2);
68      var diameter = Math.sqrt(2 * size * size);
69      var scaleX = diameter / toRect.width;
70      var scaleY = diameter / toRect.height;
71      var scale = 'scale(' + scaleX + ',' + scaleY + ')';
72
73      this._effect = new KeyframeEffect(shared.to, [
74        {'transform': translate + ' scale(0)'},
75        {'transform': translate + ' ' + scale}
76      ], this.timingFromConfig(config));
77
78      this.setPrefixedProperty(shared.to, 'transformOrigin', '50% 50%');
79      shared.to.style.borderRadius = '50%';
80
81      return this._effect;
82    },
83
84    complete: function() {
85      if (this.sharedElements) {
86        this.setPrefixedProperty(this.sharedElements.to, 'transformOrigin', '');
87        this.sharedElements.to.style.borderRadius = '';
88      }
89    }
90
91  });
92
93</script>
94