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55 lines
1.6 KiB
55 lines
1.6 KiB
/** |
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* Copyright 2012-2016, Plotly, Inc. |
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* All rights reserved. |
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* |
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* This source code is licensed under the MIT license found in the |
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* LICENSE file in the root directory of this source tree. |
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*/ |
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// This code adapted from: |
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// |
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// http://paulirish.com/2011/requestanimationframe-for-smart-animating/ |
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// http://my.opera.com/emoller/blog/2011/12/20/requestanimationframe-for-smart-er-animating |
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// requestAnimationFrame polyfill by Erik Möller. fixes from Paul Irish and Tino Zijdel |
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// MIT license |
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(function(){ |
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'use strict'; |
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if(!Date.now) { |
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Date.now = function() { return (new Date()).getTime(); }; |
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} |
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var vendors = ['webkit', 'moz']; |
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var i = 0; |
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var l = vendors.length; |
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var vp; |
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var lastTime = 0; |
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for(; i < l && !window.requestAnimationFrame; ++i) { |
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vp = vendors[i]; |
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window.requestAnimationFrame = window[vp + 'RequestAnimationFrame']; |
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window.cancelAnimationFrame = (window[vp + 'CancelAnimationFrame'] || |
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window[vp + 'CancelRequestAnimationFrame']); |
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} |
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if(/iP(ad|hone|od).*OS 6/.test(window.navigator.userAgent) || // iOS6 is buggy |
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!window.requestAnimationFrame || !window.cancelAnimationFrame) { |
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window.requestAnimationFrame = function(callback) { |
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var now = Date.now(); |
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var nextTime = Math.max(lastTime + 16, now); |
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return setTimeout(function() { callback(lastTime = nextTime); }, |
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nextTime - now); |
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}; |
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window.cancelAnimationFrame = clearTimeout; |
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} |
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vendors = null; |
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i = null; |
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l = null; |
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vp = null; |
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}());
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