106 lines
2.9 KiB
JavaScript
106 lines
2.9 KiB
JavaScript
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'use strict';
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// Polyfill for requestAnimationFrame
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(function() {
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if (!Date.now)
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Date.now = function() { return new Date().getTime(); };
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var vendors = ['webkit', 'moz'];
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for (var i = 0; i < vendors.length && !window.requestAnimationFrame; ++i) {
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var 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)
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|| !window.requestAnimationFrame || !window.cancelAnimationFrame) {
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var lastTime = 0;
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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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})();
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var initClasses = ['mui-enter', 'mui-leave'];
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var activeClasses = ['mui-enter-active', 'mui-leave-active'];
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// Find the right "transitionend" event for this browser
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var endEvent = (function() {
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var transitions = {
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'transition': 'transitionend',
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'WebkitTransition': 'webkitTransitionEnd',
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'MozTransition': 'transitionend',
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'OTransition': 'otransitionend'
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}
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var elem = window.document.createElement('div');
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for (var t in transitions) {
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if (typeof elem.style[t] !== 'undefined') {
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return transitions[t];
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}
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}
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return null;
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})();
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function animate(isIn, element, animation, cb) {
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element = $(element).eq(0);
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if (!element.length) return;
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if (endEvent === null) {
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isIn ? element.show() : element.hide();
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cb();
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return;
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}
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var initClass = isIn ? initClasses[0] : initClasses[1];
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var activeClass = isIn ? activeClasses[0] : activeClasses[1];
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// Set up the animation
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reset();
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element.addClass(animation);
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element.css('transition', 'none');
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requestAnimationFrame(function() {
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element.addClass(initClass);
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if (isIn) element.show();
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});
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// Start the animation
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requestAnimationFrame(function() {
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element[0].offsetWidth;
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element.css('transition', '');
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element.addClass(activeClass);
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});
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// Clean up the animation when it finishes
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element.one('transitionend', finish);
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// Hides the element (for out animations), resets the element, and runs a callback
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function finish() {
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if (!isIn) element.hide();
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reset();
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if (cb) cb.apply(element);
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}
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// Resets transitions and removes motion-specific classes
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function reset() {
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element[0].style.transitionDuration = 0;
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element.removeClass(initClass + ' ' + activeClass + ' ' + animation);
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}
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}
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var MotionUI = {
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animateIn: function(element, animation, cb) {
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animate(true, element, animation, cb);
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},
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animateOut: function(element, animation, cb) {
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animate(false, element, animation, cb);
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}
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};
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