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

third_party/web-animations-js/sources/src/tick.js

+// 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) {
+  var originalRequestAnimationFrame = window.requestAnimationFrame;
+  var rafCallbacks = [];
+  var rafId = 0;
+  window.requestAnimationFrame = function(f) {
+    var id = rafId++;
+    if (rafCallbacks.length == 0 && !WEB_ANIMATIONS_TESTING) {
+      originalRequestAnimationFrame(processRafCallbacks);
+    }
+    rafCallbacks.push([id, f]);
+    return id;
+  };
+
+  window.cancelAnimationFrame = function(id) {
+    rafCallbacks.forEach(function(entry) {
+      if (entry[0] == id) {
+        entry[1] = function() {};
+      }
+    });
+  };
+
+  function processRafCallbacks(t) {
+    var processing = rafCallbacks;
+    rafCallbacks = [];
+    tick(t);
+    processing.forEach(function(entry) { entry[1](t); });
+    if (needsRetick)
+      tick(t);
+    applyPendingEffects();
+  }
+
+  function comparePlayers(leftPlayer, rightPlayer) {
+    return leftPlayer._sequenceNumber - rightPlayer._sequenceNumber;
+  }
+
+  function InternalTimeline() {
+    this._players = [];
+    // Android 4.3 browser has window.performance, but not window.performance.now
+    this.currentTime = window.performance && performance.now ? performance.now() : 0;
+  };
+
+  InternalTimeline.prototype = {
+    _play: function(source) {
+      source._timing = shared.normalizeTimingInput(source.timing);
+      var player = new scope.Player(source);
+      player._idle = false;
+      player._timeline = this;
+      this._players.push(player);
+      scope.restart();
+      scope.invalidateEffects();
+      return player;
+    }
+  };
+
+  var ticking = false;
+  var hasRestartedThisFrame = false;
+
+  scope.restart = function() {
+    if (!ticking) {
+      ticking = true;
+      requestAnimationFrame(function() {});
+      hasRestartedThisFrame = true;
+    }
+    return hasRestartedThisFrame;
+  };
+
+  var needsRetick = false;
+  scope.invalidateEffects = function() {
+    needsRetick = true;
+  };
+
+  var pendingEffects = [];
+  function applyPendingEffects() {
+    pendingEffects.forEach(function(f) { f(); });
+  }
+
+  var originalGetComputedStyle = window.getComputedStyle;
+  Object.defineProperty(window, 'getComputedStyle', {
+    configurable: true,
+    enumerable: true,
+    value: function() {
+      if (needsRetick) tick(timeline.currentTime);
+      applyPendingEffects();
+      return originalGetComputedStyle.apply(this, arguments);
+    },
+  });
+
+  function tick(t) {
+    hasRestartedThisFrame = false;
+    var timeline = scope.timeline;
+    timeline.currentTime = t;
+    timeline._players.sort(comparePlayers);
+    ticking = false;
+    var updatingPlayers = timeline._players;
+    timeline._players = [];
+
+    var newPendingClears = [];
+    var newPendingEffects = [];
+    updatingPlayers = updatingPlayers.filter(function(player) {
+      player._inTimeline = player._tick(t);
+
+      if (!player._inEffect)
+        newPendingClears.push(player._source);
+      else
+        newPendingEffects.push(player._source);
+
+      if (!player.finished && !player.paused && !player._idle)
+        ticking = true;
+
+      return player._inTimeline;
+    });
+
+    pendingEffects.length = 0;
+    pendingEffects.push.apply(pendingEffects, newPendingClears);
+    pendingEffects.push.apply(pendingEffects, newPendingEffects);
+
+    timeline._players.push.apply(timeline._players, updatingPlayers);
+    needsRetick = false;
+
+    if (ticking)
+      requestAnimationFrame(function() {});
+  };
+
+  if (WEB_ANIMATIONS_TESTING) {
+    testing.tick = processRafCallbacks;
+    testing.isTicking = function() { return ticking; };
+    testing.setTicking = function(newVal) { ticking = newVal; };
+  }
+
+  var timeline = new InternalTimeline();
+  scope.timeline = timeline;
+
+})(webAnimationsShared, webAnimations1, webAnimationsTesting);