418 lines
13 KiB
JavaScript
418 lines
13 KiB
JavaScript
/*! UIkit 2.21.0 | http://www.getuikit.com | (c) 2014 YOOtheme | MIT License */
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(function(addon) {
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var component;
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if (window.UIkit) {
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component = addon(UIkit);
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}
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if (typeof define == "function" && define.amd) {
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define("uikit-parallax", ["uikit"], function(){
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return component || addon(UIkit);
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});
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}
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})(function(UI){
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"use strict";
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var parallaxes = [],
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supports3d = false,
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scrolltop = 0,
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wh = window.innerHeight,
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checkParallaxes = function() {
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scrolltop = UI.$win.scrollTop();
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window.requestAnimationFrame.apply(window, [function(){
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for (var i=0; i < parallaxes.length; i++) {
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parallaxes[i].process();
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}
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}]);
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};
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UI.component('parallax', {
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defaults: {
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velocity : 0.5,
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target : false,
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viewport : false,
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media : false
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},
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boot: function() {
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supports3d = (function(){
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var el = document.createElement('div'),
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has3d,
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transforms = {
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'WebkitTransform':'-webkit-transform',
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'MSTransform':'-ms-transform',
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'MozTransform':'-moz-transform',
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'Transform':'transform'
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};
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// Add it to the body to get the computed style.
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document.body.insertBefore(el, null);
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for (var t in transforms) {
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if (el.style[t] !== undefined) {
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el.style[t] = "translate3d(1px,1px,1px)";
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has3d = window.getComputedStyle(el).getPropertyValue(transforms[t]);
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}
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}
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document.body.removeChild(el);
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return (has3d !== undefined && has3d.length > 0 && has3d !== "none");
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})();
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// listen to scroll and resize
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UI.$doc.on("scrolling.uk.document", checkParallaxes);
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UI.$win.on("load resize orientationchange", UI.Utils.debounce(function(){
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wh = window.innerHeight;
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checkParallaxes();
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}, 50));
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// init code
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UI.ready(function(context) {
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UI.$('[data-uk-parallax]', context).each(function() {
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var parallax = UI.$(this);
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if (!parallax.data("parallax")) {
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var obj = UI.parallax(parallax, UI.Utils.options(parallax.attr("data-uk-parallax")));
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}
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});
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});
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},
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init: function() {
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this.base = this.options.target ? UI.$(this.options.target) : this.element;
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this.props = {};
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this.velocity = (this.options.velocity || 1);
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var reserved = ['target','velocity','viewport','plugins','media'];
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Object.keys(this.options).forEach(function(prop){
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if (reserved.indexOf(prop) !== -1) {
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return;
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}
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var start, end, dir, diff, startend = String(this.options[prop]).split(',');
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if (prop.match(/color/i)) {
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start = startend[1] ? startend[0] : this._getStartValue(prop),
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end = startend[1] ? startend[1] : startend[0];
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if (!start) {
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start = 'rgba(255,255,255,0)';
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}
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} else {
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start = parseFloat(startend[1] ? startend[0] : this._getStartValue(prop)),
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end = parseFloat(startend[1] ? startend[1] : startend[0]);
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diff = (start < end ? (end-start):(start-end));
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dir = (start < end ? 1:-1);
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}
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this.props[prop] = { 'start': start, 'end': end, 'dir': dir, 'diff': diff };
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}.bind(this));
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parallaxes.push(this);
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},
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process: function() {
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if (this.options.media) {
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switch(typeof(this.options.media)) {
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case 'number':
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if (window.innerWidth < this.options.media) {
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return false;
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}
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break;
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case 'string':
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if (window.matchMedia && !window.matchMedia(this.options.media).matches) {
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return false;
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}
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break;
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}
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}
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var percent = this.percentageInViewport();
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if (this.options.viewport !== false) {
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percent = (this.options.viewport === 0) ? 1 : percent / this.options.viewport;
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}
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this.update(percent);
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},
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percentageInViewport: function() {
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var top = this.base.offset().top,
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height = this.base.outerHeight(),
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distance, percentage, percent;
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if (top > (scrolltop + wh)) {
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percent = 0;
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} else if ((top + height) < scrolltop) {
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percent = 1;
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} else {
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if ((top + height) < wh) {
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percent = (scrolltop < wh ? scrolltop : scrolltop - wh) / (top+height);
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} else {
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distance = (scrolltop + wh) - top;
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percentage = Math.round(distance / ((wh + height) / 100));
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percent = percentage/100;
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}
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}
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return percent;
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},
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update: function(percent) {
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var css = {'transform':''},
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compercent = percent * (1 - (this.velocity - (this.velocity * percent))),
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opts, val;
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if (compercent < 0) compercent = 0;
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if (compercent > 1) compercent = 1;
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if (this._percent !== undefined && this._percent == compercent) {
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return;
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}
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Object.keys(this.props).forEach(function(prop) {
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opts = this.props[prop];
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if (percent === 0) {
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val = opts.start;
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} else if(percent === 1) {
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val = opts.end;
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} else if(opts.diff !== undefined) {
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val = opts.start + (opts.diff * compercent * opts.dir);
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}
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if ((prop == 'bg' || prop == 'bgp') && !this._bgcover) {
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this._bgcover = initBgImageParallax(this, prop, opts);
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}
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switch(prop) {
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// transforms
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case "x":
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css.transform += supports3d ? ' translate3d('+val+'px, 0, 0)':' translateX('+val+'px)';
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break;
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case "xp":
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css.transform += supports3d ? ' translate3d('+val+'%, 0, 0)':' translateX('+val+'%)';
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break;
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case "y":
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css.transform += supports3d ? ' translate3d(0, '+val+'px, 0)':' translateY('+val+'px)';
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break;
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case "yp":
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css.transform += supports3d ? ' translate3d(0, '+val+'%, 0)':' translateY('+val+'%)';
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break;
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case "rotate":
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css.transform += ' rotate('+val+'deg)';
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break;
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case "scale":
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css.transform += ' scale('+val+')';
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break;
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// bg image
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case "bg":
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css['background-position'] = '50% '+val+'px';
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break;
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case "bgp":
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css['background-position'] = '50% '+val+'%';
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break;
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// color
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case "color":
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case "background-color":
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case "border-color":
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css[prop] = calcColor(opts.start, opts.end, compercent);
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break;
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default:
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css[prop] = val;
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break;
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}
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}.bind(this));
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this.element.css(css);
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this._percent = compercent;
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},
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_getStartValue: function(prop) {
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var value = 0;
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switch(prop) {
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case 'scale':
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value = 1;
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break;
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default:
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value = this.element.css(prop);
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}
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return (value || 0);
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}
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});
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// helper
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function initBgImageParallax(obj, prop, opts) {
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var img = new Image(), url, loaded, element, size, check, ratio, width, height;
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element = obj.element.css({'background-size': 'cover', 'background-repeat': 'no-repeat'});
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url = element.css('background-image').replace(/^url\(/g, '').replace(/\)$/g, '').replace(/("|')/g, '');
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check = function() {
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var w = element.width(), h = element.height(), extra = (prop=='bg') ? opts.diff : (opts.diff/100) * h;
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h += extra;
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w += Math.ceil(extra * ratio);
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// if element height < parent height (gap underneath)
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if ((w / ratio) < h) {
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width = Math.ceil(h * ratio);
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height = h;
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// element width < parent width (gap to right)
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} else {
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width = w;
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height = Math.ceil(w / ratio);
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}
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obj.element.css({'background-size': (width+'px '+height+'px')});
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};
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img.onerror = function(){
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// image url doesn't exist
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};
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img.onload = function(){
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size = {w:img.width, height:img.height};
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ratio = img.width / img.height;
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UI.$win.on("load resize orientationchange", UI.Utils.debounce(function(){
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check();
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}, 50));
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check();
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};
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img.src = url;
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return true;
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}
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// Some named colors to work with, added by Bradley Ayers
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// From Interface by Stefan Petre
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// http://interface.eyecon.ro/
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var colors = {
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'black': [0,0,0,1],
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'blue': [0,0,255,1],
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'brown': [165,42,42,1],
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'cyan': [0,255,255,1],
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'fuchsia': [255,0,255,1],
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'gold': [255,215,0,1],
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'green': [0,128,0,1],
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'indigo': [75,0,130,1],
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'khaki': [240,230,140,1],
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'lime': [0,255,0,1],
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'magenta': [255,0,255,1],
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'maroon': [128,0,0,1],
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'navy': [0,0,128,1],
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'olive': [128,128,0,1],
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'orange': [255,165,0,1],
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'pink': [255,192,203,1],
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'purple': [128,0,128,1],
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'violet': [128,0,128,1],
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'red': [255,0,0,1],
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'silver': [192,192,192,1],
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'white': [255,255,255,1],
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'yellow': [255,255,0,1],
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'transparent': [255,255,255,0]
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};
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function calcColor(start, end, pos) {
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start = parseColor(start);
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end = parseColor(end);
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pos = pos || 0;
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return calculateColor(start, end, pos);
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}
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/**!
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* @preserve Color animation 1.6.0
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* http://www.bitstorm.org/jquery/color-animation/
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* Copyright 2011, 2013 Edwin Martin <edwin@bitstorm.org>
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* Released under the MIT and GPL licenses.
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*/
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// Calculate an in-between color. Returns "#aabbcc"-like string.
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function calculateColor(begin, end, pos) {
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var color = 'rgba('
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+ parseInt((begin[0] + pos * (end[0] - begin[0])), 10) + ','
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+ parseInt((begin[1] + pos * (end[1] - begin[1])), 10) + ','
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+ parseInt((begin[2] + pos * (end[2] - begin[2])), 10) + ','
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+ (begin && end ? parseFloat(begin[3] + pos * (end[3] - begin[3])) : 1);
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color += ')';
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return color;
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}
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// Parse an CSS-syntax color. Outputs an array [r, g, b]
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function parseColor(color) {
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var match, quadruplet;
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// Match #aabbcc
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if (match = /#([0-9a-fA-F]{2})([0-9a-fA-F]{2})([0-9a-fA-F]{2})/.exec(color)) {
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quadruplet = [parseInt(match[1], 16), parseInt(match[2], 16), parseInt(match[3], 16), 1];
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// Match #abc
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} else if (match = /#([0-9a-fA-F])([0-9a-fA-F])([0-9a-fA-F])/.exec(color)) {
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quadruplet = [parseInt(match[1], 16) * 17, parseInt(match[2], 16) * 17, parseInt(match[3], 16) * 17, 1];
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// Match rgb(n, n, n)
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} else if (match = /rgb\(\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*\)/.exec(color)) {
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quadruplet = [parseInt(match[1]), parseInt(match[2]), parseInt(match[3]), 1];
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} else if (match = /rgba\(\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*,\s*([0-9\.]*)\s*\)/.exec(color)) {
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quadruplet = [parseInt(match[1], 10), parseInt(match[2], 10), parseInt(match[3], 10),parseFloat(match[4])];
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// No browser returns rgb(n%, n%, n%), so little reason to support this format.
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} else {
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quadruplet = colors[color] || [255,255,255,0];
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}
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return quadruplet;
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}
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return UI.parallax;
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});
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