www.reboot.components.bower_components.web-animations-js.src.effect-callback.js Maven / Gradle / Ivy
// 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 nullTarget = document.createElementNS('http://www.w3.org/1999/xhtml', 'div');
var sequenceNumber = 0;
scope.bindPlayerForCustomEffect = function(player) {
var target = player.source.target;
var effect = player.source.effect;
var timing = player.source.timing;
var last = undefined;
timing = shared.normalizeTimingInput(timing);
var callback = function() {
var t = callback._player ? callback._player.currentTime : null;
if (t !== null) {
t = shared.calculateTimeFraction(shared.calculateActiveDuration(timing), t, timing);
if (isNaN(t))
t = null;
}
// FIXME: There are actually more conditions under which the effect
// should be called.
if (t !== last)
effect(t, target, player.source);
last = t;
};
callback._player = player;
callback._registered = false;
callback._sequenceNumber = sequenceNumber++;
player._callback = callback;
register(callback);
};
var callbacks = [];
var ticking = false;
function register(callback) {
if (callback._registered)
return;
callback._registered = true;
callbacks.push(callback);
if (!ticking) {
ticking = true;
requestAnimationFrame(tick);
}
}
function tick(t) {
var updating = callbacks;
callbacks = [];
updating.sort(function(left, right) {
return left._sequenceNumber - right._sequenceNumber;
});
updating.filter(function(callback) {
callback();
if (!callback._player || callback._player.finished || callback._player.paused)
callback._registered = false;
return callback._registered;
});
callbacks.push.apply(callbacks, updating);
if (callbacks.length) {
ticking = true;
requestAnimationFrame(tick);
} else {
ticking = false;
}
}
scope.Player.prototype._register = function() {
if (this._callback)
register(this._callback);
};
})(webAnimationsShared, webAnimationsNext, webAnimationsTesting);