systrace/catapult/third_party/polymer/components/neon-animation/animations/transform-animation.html

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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">
<link rel="import" href="../web-animations.html">

<!--
`<transform-animation>` animates a custom transform on an element. Use this to animate multiple
transform properties, or to apply a custom transform value.

Configuration:
```
{
  name: 'transform-animation',
  node: <node>,
  transformOrigin: <transform-origin>,
  transformFrom: <transform-from-string>,
  transformTo: <transform-to-string>,
  timing: <animation-timing>
}
```
-->

<script>

  Polymer({

    is: 'transform-animation',

    behaviors: [
      Polymer.NeonAnimationBehavior
    ],

    /**
     * @param {{
     *   node: !Element,
     *   transformOrigin: (string|undefined),
     *   transformFrom: (string|undefined),
     *   transformTo: (string|undefined),
     *   timing: (Object|undefined)
     * }} config
     */
    configure: function(config) {
      var node = config.node;
      var transformFrom = config.transformFrom || 'none';
      var transformTo = config.transformTo || 'none';

      this._effect = new KeyframeEffect(node, [
        {'transform': transformFrom},
        {'transform': transformTo}
      ], this.timingFromConfig(config));

      if (config.transformOrigin) {
        this.setPrefixedProperty(node, 'transformOrigin', config.transformOrigin);
      }

      return this._effect;
    }

  });

</script>