Pull web-animations-js into third-party via the third_party/polymer/reproduce.sh script. Add necess…

third_party/web-animations-js/sources/src/animation-constructor.js

Index: third_party/web-animations-js/sources/src/animation-constructor.js
diff --git a/third_party/web-animations-js/sources/src/animation-constructor.js b/third_party/web-animations-js/sources/src/animation-constructor.js
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+// Copyright 2014 Google Inc. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+//     You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+//     See the License for the specific language governing permissions and
+// limitations under the License.
+
+(function(shared, scope, testing) {
+
+  function groupChildDuration(node) {
+    return node._timing.delay + node.activeDuration + node._timing.endDelay;
+  };
+
+  function KeyframeEffect(effect) {
+    this._frames = shared.normalizeKeyframes(effect);
+  }
+
+  KeyframeEffect.prototype = {
+    getFrames: function() { return this._frames; }
+  };
+
+  scope.Animation = function(target, effect, timingInput) {
+    this.target = target;
+
+    // TODO: Store a clone, not the same instance.
+    this._timingInput = timingInput;
+    this._timing = shared.normalizeTimingInput(timingInput);
+
+    // TODO: Make modifications to timing update the underlying player
+    this.timing = shared.makeTiming(timingInput);
+    // TODO: Make this a live object - will need to separate normalization of
+    // keyframes into a shared module.
+    if (typeof effect == 'function')
+      this.effect = effect;
+    else
+      this.effect = new KeyframeEffect(effect);
+    this._effect = effect;
+    this.activeDuration = shared.calculateActiveDuration(this._timing);
+    return this;
+  };
+
+  var originalElementAnimate = Element.prototype.animate;
+  Element.prototype.animate = function(effect, timing) {
+    return scope.timeline.play(new scope.Animation(this, effect, timing));
+  };
+
+  var nullTarget = document.createElementNS('http://www.w3.org/1999/xhtml', 'div');
+  scope.newUnderlyingPlayerForAnimation = function(animation) {
+    var target = animation.target || nullTarget;
+    var effect = animation._effect;
+    if (typeof effect == 'function') {
+      effect = [];
+    }
+    return originalElementAnimate.apply(target, [effect, animation._timingInput]);
+  };
+
+  scope.bindPlayerForAnimation = function(player) {
+    if (player.source && typeof player.source.effect == 'function') {
+      scope.bindPlayerForCustomEffect(player);
+    }
+  };
+
+  var pendingGroups = [];
+  scope.awaitStartTime = function(groupPlayer) {
+    if (groupPlayer.startTime !== null || !groupPlayer._isGroup)
+      return;
+    if (pendingGroups.length == 0) {
+      requestAnimationFrame(updatePendingGroups);
+    }
+    pendingGroups.push(groupPlayer);
+  };
+  function updatePendingGroups() {
+    var updated = false;
+    while (pendingGroups.length) {
+      pendingGroups.shift()._updateChildren();
+      updated = true;
+    }
+    return updated;
+  }
+  var originalGetComputedStyle = window.getComputedStyle;
+  Object.defineProperty(window, 'getComputedStyle', {
+    configurable: true,
+    enumerable: true,
+    value: function() {
+      var result = originalGetComputedStyle.apply(this, arguments);
+      if (updatePendingGroups())
+        result = originalGetComputedStyle.apply(this, arguments);
+      return result;
+    },
+  });
+
+  // TODO: Call into this less frequently.
+  scope.Player.prototype._updateChildren = function() {
+    if (this.paused || !this.source || !this._isGroup)
+      return;
+    var offset = this.source._timing.delay;
+    for (var i = 0; i < this.source.children.length; i++) {
+      var child = this.source.children[i];
+      var childPlayer;
+
+      if (i >= this._childPlayers.length) {
+        childPlayer = window.document.timeline.play(child);
+        this._childPlayers.push(childPlayer);
+      } else {
+        childPlayer = this._childPlayers[i];
+      }
+      child.player = this.source.player;
+
+      if (childPlayer.startTime != this.startTime + offset) {
+        if (this.startTime === null) {
+          childPlayer.currentTime = this.source.player.currentTime - offset;
+          childPlayer._startTime = null;
+        } else {
+          childPlayer.startTime = this.startTime + offset;
+        }
+        childPlayer._updateChildren();
+      }
+
+      if (this.playbackRate == -1 && this.currentTime < offset && childPlayer.currentTime !== -1) {
+        childPlayer.currentTime = -1;
+      }
+
+      if (this.source instanceof window.AnimationSequence)
+        offset += groupChildDuration(child);
+    }
+  };
+
+  window.Animation = scope.Animation;
+  window.Element.prototype.getAnimationPlayers = function() {
+    return document.timeline.getAnimationPlayers().filter(function(player) {
+      return player.source !== null && player.source.target == this;
+    }.bind(this));
+  };
+
+  scope.groupChildDuration = groupChildDuration;
+
+}(webAnimationsShared, webAnimationsNext, webAnimationsTesting));