web animation updates

scripts/vendor/web-animations-js/src/web-animations-next-animation.js

@@ -0,0 +1,235 @@
+// 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) {
+  scope.Animation = function(effect) {
+    this.effect = effect;
+    if (effect) {
+      // FIXME: detach existing animation.
+      effect.animation = this;
+    }
+    this._isGroup = false;
+    this._animation = null;
+    this._childAnimations = [];
+    this._callback = null;
+    this._rebuildUnderlyingAnimation();
+    // Animations are constructed in the idle state.
+    this._animation.cancel();
+  };
+
+  // TODO: add an effect getter/setter
+  scope.Animation.prototype = {
+    _rebuildUnderlyingAnimation: function() {
+      if (this._animation) {
+        this._animation.cancel();
+        this._animation = null;
+      }
+
+      if (!this.effect || this.effect instanceof window.KeyframeEffect) {
+        this._animation = scope.newUnderlyingAnimationForKeyframeEffect(this.effect);
+        scope.bindAnimationForKeyframeEffect(this);
+      }
+      if (this.effect instanceof window.SequenceEffect || this.effect instanceof window.GroupEffect) {
+        this._animation = scope.newUnderlyingAnimationForGroup(this.effect);
+        scope.bindAnimationForGroup(this);
+      }
+
+      // FIXME: move existing currentTime/startTime/playState to new animation
+    },
+    _updateChildren: function() {
+      if (!this.effect || this.playState == 'idle')
+        return;
+
+      var offset = this.effect._timing.delay;
+      this._childAnimations.forEach(function(childAnimation) {
+        this._arrangeChildren(childAnimation, offset);
+        if (this.effect instanceof window.SequenceEffect)
+          offset += scope.groupChildDuration(childAnimation.effect);
+      }.bind(this));
+    },
+    _setExternalAnimation: function(animation) {
+      if (!this.effect || !this._isGroup)
+        return;
+      for (var i = 0; i < this.effect.children.length; i++) {
+        this.effect.children[i].animation = animation;
+        this._childAnimations[i]._setExternalAnimation(animation);
+      }
+    },
+    _constructChildren: function() {
+      if (!this.effect || !this._isGroup)
+        return;
+      var offset = this.effect._timing.delay;
+      this.effect.children.forEach(function(child) {
+        var childAnimation = window.document.timeline.play(child);
+        this._childAnimations.push(childAnimation);
+        childAnimation.playbackRate = this.playbackRate;
+        if (this.paused)
+          childAnimation.pause();
+        child.animation = this.effect.animation;
+
+        this._arrangeChildren(childAnimation, offset);
+
+        if (this.effect instanceof window.SequenceEffect)
+          offset += scope.groupChildDuration(child);
+      }.bind(this));
+    },
+    _arrangeChildren: function(childAnimation, offset) {
+      if (this.startTime === null) {
+        childAnimation.currentTime = this.currentTime - offset / this.playbackRate;
+        childAnimation._startTime = null;
+      } else if (childAnimation.startTime !== this.startTime + offset / this.playbackRate) {
+        childAnimation.startTime = this.startTime + offset / this.playbackRate;
+      }
+    },
+    get paused() {
+      return this._animation.paused;
+    },
+    get playState() {
+      return this._animation.playState;
+    },
+    get onfinish() {
+      return this._onfinish;
+    },
+    set onfinish(v) {
+      if (typeof v == 'function') {
+        this._onfinish = v;
+        this._animation.onfinish = (function(e) {
+          e.target = this;
+          v.call(this, e);
+        }).bind(this);
+      } else {
+        this._animation.onfinish = v;
+        this.onfinish = this._animation.onfinish;
+      }
+    },
+    get currentTime() {
+      return this._animation.currentTime;
+    },
+    set currentTime(v) {
+      this._animation.currentTime = v;
+      this._register();
+      this._forEachChild(function(child, offset) {
+        child.currentTime = v - offset;
+      });
+    },
+    get startTime() {
+      return this._animation.startTime;
+    },
+    set startTime(v) {
+      this._animation.startTime = v;
+      this._register();
+      this._forEachChild(function(child, offset) {
+        child.startTime = v + offset;
+      });
+    },
+    get playbackRate() {
+      return this._animation.playbackRate;
+    },
+    set playbackRate(value) {
+      var oldCurrentTime = this.currentTime;
+      this._animation.playbackRate = value;
+      this._forEachChild(function(childAnimation) {
+        childAnimation.playbackRate = value;
+      });
+      if (this.playState != 'paused' && this.playState != 'idle') {
+        this.play();
+      }
+      if (oldCurrentTime !== null) {
+        this.currentTime = oldCurrentTime;
+      }
+    },
+    get finished() {
+      return this._animation.finished;
+    },
+    get source() {
+      shared.deprecated('Animation.source', '2015-03-23', 'Use Animation.effect instead.');
+      return this.effect;
+    },
+    play: function() {
+      this._animation.play();
+      this._register();
+      scope.awaitStartTime(this);
+      this._forEachChild(function(child) {
+        var time = child.currentTime;
+        child.play();
+        child.currentTime = time;
+      });
+    },
+    pause: function() {
+      this._animation.pause();
+      this._register();
+      this._forEachChild(function(child) {
+        child.pause();
+      });
+    },
+    finish: function() {
+      this._animation.finish();
+      this._register();
+      // TODO: child animations??
+    },
+    cancel: function() {
+      this._animation.cancel();
+      this._register();
+      this._removeChildren();
+    },
+    reverse: function() {
+      var oldCurrentTime = this.currentTime;
+      this._animation.reverse();
+      this._forEachChild(function(childAnimation) {
+        childAnimation.reverse();
+      });
+      if (oldCurrentTime !== null) {
+        this.currentTime = oldCurrentTime;
+      }
+    },
+    addEventListener: function(type, handler) {
+      var wrapped = handler;
+      if (typeof handler == 'function') {
+        wrapped = (function(e) {
+          e.target = this;
+          handler.call(this, e);
+        }).bind(this);
+        handler._wrapper = wrapped;
+      }
+      this._animation.addEventListener(type, wrapped);
+    },
+    removeEventListener: function(type, handler) {
+      this._animation.removeEventListener(type, (handler && handler._wrapper) || handler);
+    },
+    _removeChildren: function() {
+      while (this._childAnimations.length)
+        this._childAnimations.pop().cancel();
+    },
+    _forEachChild: function(f) {
+      var offset = 0;
+      if (this.effect.children && this._childAnimations.length < this.effect.children.length)
+        this._constructChildren();
+      this._childAnimations.forEach(function(child) {
+        f.call(this, child, offset);
+        if (this.effect instanceof window.SequenceEffect)
+          offset += child.effect.activeDuration;
+      }.bind(this));
+
+      if (this._animation.playState == 'pending')
+        return;
+      var timing = this.effect._timing;
+      var t = this._animation.currentTime;
+      if (t !== null)
+        t = shared.calculateTimeFraction(shared.calculateActiveDuration(timing), t, timing);
+      if (t == null || isNaN(t))
+        this._removeChildren();
+    },
+  };
+
+})(webAnimationsShared, webAnimationsNext, webAnimationsTesting);