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-/*!
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- * parallax.js v1.5.0 (http://pixelcog.github.io/parallax.js/)
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- * @copyright 2016 PixelCog, Inc.
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- * @license MIT (https://github.com/pixelcog/parallax.js/blob/master/LICENSE)
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- */
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-
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-;(function ( $, window, document, undefined ) {
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-
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- // Polyfill for requestAnimationFrame
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- // via: https://gist.github.com/paulirish/1579671
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-
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- (function() {
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- var lastTime = 0;
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- var vendors = ['ms', 'moz', 'webkit', 'o'];
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- for(var x = 0; x < vendors.length && !window.requestAnimationFrame; ++x) {
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- window.requestAnimationFrame = window[vendors[x]+'RequestAnimationFrame'];
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- window.cancelAnimationFrame = window[vendors[x]+'CancelAnimationFrame'] || window[vendors[x]+'CancelRequestAnimationFrame'];
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- }
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-
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- if (!window.requestAnimationFrame)
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- window.requestAnimationFrame = function(callback) {
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- var currTime = new Date().getTime();
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- var timeToCall = Math.max(0, 16 - (currTime - lastTime));
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- var id = window.setTimeout(function() { callback(currTime + timeToCall); },
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- timeToCall);
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- lastTime = currTime + timeToCall;
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- return id;
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- };
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-
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- if (!window.cancelAnimationFrame)
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- window.cancelAnimationFrame = function(id) {
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- clearTimeout(id);
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- };
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- }());
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-
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-
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- // Parallax Constructor
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-
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- function Parallax(element, options) {
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- var self = this;
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-
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- if (typeof options == 'object') {
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- delete options.refresh;
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- delete options.render;
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- $.extend(this, options);
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- }
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-
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- this.$element = $(element);
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-
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- if (!this.imageSrc && this.$element.is('img')) {
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- this.imageSrc = this.$element.attr('src');
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- }
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-
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- var positions = (this.position + '').toLowerCase().match(/\S+/g) || [];
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-
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- if (positions.length < 1) {
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- positions.push('center');
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- }
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- if (positions.length == 1) {
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- positions.push(positions[0]);
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- }
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-
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- if (positions[0] == 'top' || positions[0] == 'bottom' || positions[1] == 'left' || positions[1] == 'right') {
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- positions = [positions[1], positions[0]];
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- }
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-
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- if (this.positionX !== undefined) positions[0] = this.positionX.toLowerCase();
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- if (this.positionY !== undefined) positions[1] = this.positionY.toLowerCase();
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-
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- self.positionX = positions[0];
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- self.positionY = positions[1];
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-
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- if (this.positionX != 'left' && this.positionX != 'right') {
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- if (isNaN(parseInt(this.positionX))) {
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- this.positionX = 'center';
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- } else {
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- this.positionX = parseInt(this.positionX);
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- }
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- }
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-
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- if (this.positionY != 'top' && this.positionY != 'bottom') {
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- if (isNaN(parseInt(this.positionY))) {
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- this.positionY = 'center';
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- } else {
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- this.positionY = parseInt(this.positionY);
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- }
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- }
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-
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- this.position =
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- this.positionX + (isNaN(this.positionX)? '' : 'px') + ' ' +
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- this.positionY + (isNaN(this.positionY)? '' : 'px');
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-
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- if (navigator.userAgent.match(/(iPod|iPhone|iPad)/)) {
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- if (this.imageSrc && this.iosFix && !this.$element.is('img')) {
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- this.$element.css({
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- backgroundImage: 'url(' + this.imageSrc + ')',
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- backgroundSize: 'cover',
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- backgroundPosition: this.position
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- });
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- }
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- return this;
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- }
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-
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- if (navigator.userAgent.match(/(Android)/)) {
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- if (this.imageSrc && this.androidFix && !this.$element.is('img')) {
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- this.$element.css({
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- backgroundImage: 'url(' + this.imageSrc + ')',
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- backgroundSize: 'cover',
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- backgroundPosition: this.position
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- });
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- }
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- return this;
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- }
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-
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- this.$mirror = $('<div />').prependTo(this.mirrorContainer);
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-
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- var slider = this.$element.find('>.parallax-slider');
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- var sliderExisted = false;
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-
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- if (slider.length == 0)
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- this.$slider = $('<img />').prependTo(this.$mirror);
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- else {
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- this.$slider = slider.prependTo(this.$mirror)
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- sliderExisted = true;
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- }
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-
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- this.$mirror.addClass('parallax-mirror').css({
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- visibility: 'hidden',
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- zIndex: this.zIndex,
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- position: 'fixed',
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- top: 0,
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- left: 0,
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- overflow: 'hidden'
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- });
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-
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- this.$slider.addClass('parallax-slider').one('load', function() {
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- if (!self.naturalHeight || !self.naturalWidth) {
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- self.naturalHeight = this.naturalHeight || this.height || 1;
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- self.naturalWidth = this.naturalWidth || this.width || 1;
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- }
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- self.aspectRatio = self.naturalWidth / self.naturalHeight;
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-
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- Parallax.isSetup || Parallax.setup();
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- Parallax.sliders.push(self);
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- Parallax.isFresh = false;
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- Parallax.requestRender();
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- });
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-
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- if (!sliderExisted)
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- this.$slider[0].src = this.imageSrc;
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-
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- if (this.naturalHeight && this.naturalWidth || this.$slider[0].complete || slider.length > 0) {
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- this.$slider.trigger('load');
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- }
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-
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- }
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-
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-
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- // Parallax Instance Methods
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-
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- $.extend(Parallax.prototype, {
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- speed: 0.2,
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- bleed: 0,
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- zIndex: -100,
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- iosFix: true,
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- androidFix: true,
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- position: 'center',
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- overScrollFix: false,
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- mirrorContainer: 'body',
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-
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- refresh: function() {
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- this.boxWidth = this.$element.outerWidth();
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- this.boxHeight = this.$element.outerHeight() + this.bleed * 2;
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- this.boxOffsetTop = this.$element.offset().top - this.bleed;
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- this.boxOffsetLeft = this.$element.offset().left;
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- this.boxOffsetBottom = this.boxOffsetTop + this.boxHeight;
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-
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- var winHeight = Parallax.winHeight;
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- var docHeight = Parallax.docHeight;
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- var maxOffset = Math.min(this.boxOffsetTop, docHeight - winHeight);
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- var minOffset = Math.max(this.boxOffsetTop + this.boxHeight - winHeight, 0);
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- var imageHeightMin = this.boxHeight + (maxOffset - minOffset) * (1 - this.speed) | 0;
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- var imageOffsetMin = (this.boxOffsetTop - maxOffset) * (1 - this.speed) | 0;
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- var margin;
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-
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- if (imageHeightMin * this.aspectRatio >= this.boxWidth) {
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- this.imageWidth = imageHeightMin * this.aspectRatio | 0;
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- this.imageHeight = imageHeightMin;
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- this.offsetBaseTop = imageOffsetMin;
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-
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- margin = this.imageWidth - this.boxWidth;
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-
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- if (this.positionX == 'left') {
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- this.offsetLeft = 0;
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- } else if (this.positionX == 'right') {
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- this.offsetLeft = - margin;
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- } else if (!isNaN(this.positionX)) {
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- this.offsetLeft = Math.max(this.positionX, - margin);
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- } else {
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- this.offsetLeft = - margin / 2 | 0;
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- }
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- } else {
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- this.imageWidth = this.boxWidth;
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- this.imageHeight = this.boxWidth / this.aspectRatio | 0;
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- this.offsetLeft = 0;
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-
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- margin = this.imageHeight - imageHeightMin;
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-
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- if (this.positionY == 'top') {
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- this.offsetBaseTop = imageOffsetMin;
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- } else if (this.positionY == 'bottom') {
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- this.offsetBaseTop = imageOffsetMin - margin;
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- } else if (!isNaN(this.positionY)) {
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- this.offsetBaseTop = imageOffsetMin + Math.max(this.positionY, - margin);
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- } else {
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- this.offsetBaseTop = imageOffsetMin - margin / 2 | 0;
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- }
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- }
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- },
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-
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- render: function() {
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- var scrollTop = Parallax.scrollTop;
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- var scrollLeft = Parallax.scrollLeft;
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- var overScroll = this.overScrollFix ? Parallax.overScroll : 0;
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- var scrollBottom = scrollTop + Parallax.winHeight;
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-
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- if (this.boxOffsetBottom > scrollTop && this.boxOffsetTop <= scrollBottom) {
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- this.visibility = 'visible';
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- this.mirrorTop = this.boxOffsetTop - scrollTop;
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- this.mirrorLeft = this.boxOffsetLeft - scrollLeft;
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- this.offsetTop = this.offsetBaseTop - this.mirrorTop * (1 - this.speed);
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- } else {
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- this.visibility = 'hidden';
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- }
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-
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- this.$mirror.css({
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- transform: 'translate3d('+this.mirrorLeft+'px, '+(this.mirrorTop - overScroll)+'px, 0px)',
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- visibility: this.visibility,
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- height: this.boxHeight,
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- width: this.boxWidth
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- });
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-
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- this.$slider.css({
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- transform: 'translate3d('+this.offsetLeft+'px, '+this.offsetTop+'px, 0px)',
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- position: 'absolute',
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- height: this.imageHeight,
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- width: this.imageWidth,
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- maxWidth: 'none'
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- });
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- }
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- });
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-
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-
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- // Parallax Static Methods
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-
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- $.extend(Parallax, {
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- scrollTop: 0,
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- scrollLeft: 0,
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- winHeight: 0,
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- winWidth: 0,
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- docHeight: 1 << 30,
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- docWidth: 1 << 30,
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- sliders: [],
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- isReady: false,
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- isFresh: false,
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- isBusy: false,
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-
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- setup: function() {
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- if (this.isReady) return;
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-
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- var self = this;
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-
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- var $doc = $(document), $win = $(window);
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-
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- var loadDimensions = function() {
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- Parallax.winHeight = $win.height();
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- Parallax.winWidth = $win.width();
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- Parallax.docHeight = $doc.height();
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- Parallax.docWidth = $doc.width();
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- };
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-
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- var loadScrollPosition = function() {
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- var winScrollTop = $win.scrollTop();
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- var scrollTopMax = Parallax.docHeight - Parallax.winHeight;
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- var scrollLeftMax = Parallax.docWidth - Parallax.winWidth;
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- Parallax.scrollTop = Math.max(0, Math.min(scrollTopMax, winScrollTop));
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- Parallax.scrollLeft = Math.max(0, Math.min(scrollLeftMax, $win.scrollLeft()));
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- Parallax.overScroll = Math.max(winScrollTop - scrollTopMax, Math.min(winScrollTop, 0));
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- };
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-
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- $win.on('resize.px.parallax load.px.parallax', function() {
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- loadDimensions();
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- self.refresh();
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- Parallax.isFresh = false;
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- Parallax.requestRender();
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- })
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- .on('scroll.px.parallax load.px.parallax', function() {
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- loadScrollPosition();
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- Parallax.requestRender();
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- });
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-
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- loadDimensions();
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- loadScrollPosition();
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-
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- this.isReady = true;
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-
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- var lastPosition = -1;
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-
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- function frameLoop() {
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- if (lastPosition == window.pageYOffset) { // Avoid overcalculations
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- window.requestAnimationFrame(frameLoop);
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- return false;
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- } else lastPosition = window.pageYOffset;
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-
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- self.render();
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- window.requestAnimationFrame(frameLoop);
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- }
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-
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- frameLoop();
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- },
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-
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- configure: function(options) {
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- if (typeof options == 'object') {
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- delete options.refresh;
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- delete options.render;
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- $.extend(this.prototype, options);
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- }
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- },
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-
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- refresh: function() {
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- $.each(this.sliders, function(){ this.refresh(); });
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- this.isFresh = true;
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- },
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-
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- render: function() {
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- this.isFresh || this.refresh();
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- $.each(this.sliders, function(){ this.render(); });
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- },
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-
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- requestRender: function() {
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- var self = this;
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- self.render();
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- self.isBusy = false;
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- },
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- destroy: function(el){
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- var i,
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- parallaxElement = $(el).data('px.parallax');
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- parallaxElement.$mirror.remove();
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- for(i=0; i < this.sliders.length; i+=1){
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- if(this.sliders[i] == parallaxElement){
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- this.sliders.splice(i, 1);
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- }
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- }
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- $(el).data('px.parallax', false);
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- if(this.sliders.length === 0){
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- $(window).off('scroll.px.parallax resize.px.parallax load.px.parallax');
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- this.isReady = false;
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- Parallax.isSetup = false;
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- }
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- }
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- });
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-
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-
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- // Parallax Plugin Definition
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-
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- function Plugin(option) {
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- return this.each(function () {
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- var $this = $(this);
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- var options = typeof option == 'object' && option;
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-
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- if (this == window || this == document || $this.is('body')) {
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- Parallax.configure(options);
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- }
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- else if (!$this.data('px.parallax')) {
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- options = $.extend({}, $this.data(), options);
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- $this.data('px.parallax', new Parallax(this, options));
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- }
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- else if (typeof option == 'object')
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- {
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- $.extend($this.data('px.parallax'), options);
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- }
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- if (typeof option == 'string') {
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- if(option == 'destroy'){
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- Parallax.destroy(this);
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- }else{
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- Parallax[option]();
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- }
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- }
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- });
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- }
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-
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- var old = $.fn.parallax;
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-
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- $.fn.parallax = Plugin;
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- $.fn.parallax.Constructor = Parallax;
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-
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-
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- // Parallax No Conflict
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-
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- $.fn.parallax.noConflict = function () {
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- $.fn.parallax = old;
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- return this;
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- };
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-
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-
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- // Parallax Data-API
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-
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- $( function () {
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- $('[data-parallax="scroll"]').parallax();
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- });
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-
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-}(jQuery, window, document));
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