mirror of
https://github.com/Radarr/Radarr
synced 2024-12-27 02:09:59 +00:00
377 lines
No EOL
12 KiB
JavaScript
377 lines
No EOL
12 KiB
JavaScript
/*! Backstretch - v2.0.4 - 2013-06-19
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* http://srobbin.com/jquery-plugins/backstretch/
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* Copyright (c) 2013 Scott Robbin; Licensed MIT */
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;(function ($, window, undefined) {
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'use strict';
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/* PLUGIN DEFINITION
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* ========================= */
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$.fn.backstretch = function (images, options) {
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// We need at least one image or method name
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if (images === undefined || images.length === 0) {
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$.error("No images were supplied for Backstretch");
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}
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/*
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* Scroll the page one pixel to get the right window height on iOS
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* Pretty harmless for everyone else
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*/
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if ($(window).scrollTop() === 0 ) {
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window.scrollTo(0, 0);
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}
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return this.each(function () {
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var $this = $(this)
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, obj = $this.data('backstretch');
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// Do we already have an instance attached to this element?
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if (obj) {
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// Is this a method they're trying to execute?
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if (typeof images == 'string' && typeof obj[images] == 'function') {
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// Call the method
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obj[images](options);
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// No need to do anything further
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return;
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}
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// Merge the old options with the new
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options = $.extend(obj.options, options);
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// Remove the old instance
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obj.destroy(true);
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}
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obj = new Backstretch(this, images, options);
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$this.data('backstretch', obj);
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});
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};
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// If no element is supplied, we'll attach to body
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$.backstretch = function (images, options) {
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// Return the instance
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return $('body')
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.backstretch(images, options)
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.data('backstretch');
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};
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// Custom selector
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$.expr[':'].backstretch = function(elem) {
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return $(elem).data('backstretch') !== undefined;
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};
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/* DEFAULTS
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* ========================= */
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$.fn.backstretch.defaults = {
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centeredX: true // Should we center the image on the X axis?
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, centeredY: true // Should we center the image on the Y axis?
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, duration: 5000 // Amount of time in between slides (if slideshow)
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, fade: 0 // Speed of fade transition between slides
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};
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/* STYLES
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*
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* Baked-in styles that we'll apply to our elements.
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* In an effort to keep the plugin simple, these are not exposed as options.
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* That said, anyone can override these in their own stylesheet.
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* ========================= */
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var styles = {
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wrap: {
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left: 0
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, top: 0
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, overflow: 'hidden'
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, margin: 0
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, padding: 0
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, height: '100%'
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, width: '100%'
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, zIndex: -999999
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}
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, img: {
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position: 'absolute'
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, display: 'none'
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, margin: 0
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, padding: 0
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, border: 'none'
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, width: 'auto'
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, height: 'auto'
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, maxHeight: 'none'
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, maxWidth: 'none'
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, zIndex: -999999
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}
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};
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/* CLASS DEFINITION
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* ========================= */
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var Backstretch = function (container, images, options) {
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this.options = $.extend({}, $.fn.backstretch.defaults, options || {});
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/* In its simplest form, we allow Backstretch to be called on an image path.
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* e.g. $.backstretch('/path/to/image.jpg')
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* So, we need to turn this back into an array.
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*/
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this.images = $.isArray(images) ? images : [images];
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// Preload images
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$.each(this.images, function () {
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$('<img />')[0].src = this;
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});
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// Convenience reference to know if the container is body.
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this.isBody = container === document.body;
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/* We're keeping track of a few different elements
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*
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* Container: the element that Backstretch was called on.
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* Wrap: a DIV that we place the image into, so we can hide the overflow.
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* Root: Convenience reference to help calculate the correct height.
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*/
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this.$container = $(container);
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this.$root = this.isBody ? supportsFixedPosition ? $(window) : $(document) : this.$container;
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// Don't create a new wrap if one already exists (from a previous instance of Backstretch)
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var $existing = this.$container.children(".backstretch").first();
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this.$wrap = $existing.length ? $existing : $('<div class="backstretch"></div>').css(styles.wrap).appendTo(this.$container);
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// Non-body elements need some style adjustments
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if (!this.isBody) {
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// If the container is statically positioned, we need to make it relative,
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// and if no zIndex is defined, we should set it to zero.
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var position = this.$container.css('position')
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, zIndex = this.$container.css('zIndex');
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this.$container.css({
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position: position === 'static' ? 'relative' : position
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, zIndex: zIndex === 'auto' ? 0 : zIndex
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, background: 'none'
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});
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// Needs a higher z-index
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this.$wrap.css({zIndex: -999998});
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}
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// Fixed or absolute positioning?
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this.$wrap.css({
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position: this.isBody && supportsFixedPosition ? 'fixed' : 'absolute'
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});
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// Set the first image
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this.index = 0;
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this.show(this.index);
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// Listen for resize
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$(window).on('resize.backstretch', $.proxy(this.resize, this))
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.on('orientationchange.backstretch', $.proxy(function () {
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// Need to do this in order to get the right window height
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if (this.isBody && window.pageYOffset === 0) {
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window.scrollTo(0, 1);
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this.resize();
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}
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}, this));
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};
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/* PUBLIC METHODS
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* ========================= */
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Backstretch.prototype = {
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resize: function () {
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try {
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var bgCSS = {left: 0, top: 0}
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, rootWidth = this.isBody ? this.$root.width() : this.$root.innerWidth()
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, bgWidth = rootWidth
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, rootHeight = this.isBody ? ( window.innerHeight ? window.innerHeight : this.$root.height() ) : this.$root.innerHeight()
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, bgHeight = bgWidth / this.$img.data('ratio')
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, bgOffset;
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// Make adjustments based on image ratio
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if (bgHeight >= rootHeight) {
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bgOffset = (bgHeight - rootHeight) / 2;
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if(this.options.centeredY) {
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bgCSS.top = '-' + bgOffset + 'px';
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}
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} else {
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bgHeight = rootHeight;
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bgWidth = bgHeight * this.$img.data('ratio');
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bgOffset = (bgWidth - rootWidth) / 2;
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if(this.options.centeredX) {
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bgCSS.left = '-' + bgOffset + 'px';
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}
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}
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this.$wrap.css({width: rootWidth, height: rootHeight})
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.find('img:not(.deleteable)').css({width: bgWidth, height: bgHeight}).css(bgCSS);
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} catch(err) {
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// IE7 seems to trigger resize before the image is loaded.
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// This try/catch block is a hack to let it fail gracefully.
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}
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return this;
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}
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// Show the slide at a certain position
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, show: function (newIndex) {
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// Validate index
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if (Math.abs(newIndex) > this.images.length - 1) {
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return;
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}
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// Vars
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var self = this
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, oldImage = self.$wrap.find('img').addClass('deleteable')
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, evtOptions = { relatedTarget: self.$container[0] };
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// Trigger the "before" event
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self.$container.trigger($.Event('backstretch.before', evtOptions), [self, newIndex]);
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// Set the new index
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this.index = newIndex;
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// Pause the slideshow
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clearInterval(self.interval);
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// New image
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self.$img = $('<img />')
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.css(styles.img)
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.bind('load', function (e) {
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var imgWidth = this.width || $(e.target).width()
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, imgHeight = this.height || $(e.target).height();
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// Save the ratio
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$(this).data('ratio', imgWidth / imgHeight);
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// Show the image, then delete the old one
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// "speed" option has been deprecated, but we want backwards compatibilty
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$(this).fadeIn(self.options.speed || self.options.fade, function () {
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oldImage.remove();
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// Resume the slideshow
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if (!self.paused) {
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self.cycle();
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}
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// Trigger the "after" and "show" events
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// "show" is being deprecated
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$(['after', 'show']).each(function () {
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self.$container.trigger($.Event('backstretch.' + this, evtOptions), [self, newIndex]);
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});
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});
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// Resize
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self.resize();
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})
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.appendTo(self.$wrap);
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// Hack for IE img onload event
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self.$img.attr('src', self.images[newIndex]);
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return self;
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}
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, next: function () {
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// Next slide
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return this.show(this.index < this.images.length - 1 ? this.index + 1 : 0);
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}
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, prev: function () {
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// Previous slide
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return this.show(this.index === 0 ? this.images.length - 1 : this.index - 1);
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}
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, pause: function () {
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// Pause the slideshow
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this.paused = true;
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return this;
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}
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, resume: function () {
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// Resume the slideshow
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this.paused = false;
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this.next();
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return this;
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}
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, cycle: function () {
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// Start/resume the slideshow
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if(this.images.length > 1) {
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// Clear the interval, just in case
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clearInterval(this.interval);
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this.interval = setInterval($.proxy(function () {
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// Check for paused slideshow
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if (!this.paused) {
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this.next();
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}
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}, this), this.options.duration);
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}
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return this;
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}
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, destroy: function (preserveBackground) {
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// Stop the resize events
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$(window).off('resize.backstretch orientationchange.backstretch');
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// Clear the interval
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clearInterval(this.interval);
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// Remove Backstretch
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if(!preserveBackground) {
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this.$wrap.remove();
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}
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this.$container.removeData('backstretch');
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}
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};
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/* SUPPORTS FIXED POSITION?
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*
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* Based on code from jQuery Mobile 1.1.0
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* http://jquerymobile.com/
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*
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* In a nutshell, we need to figure out if fixed positioning is supported.
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* Unfortunately, this is very difficult to do on iOS, and usually involves
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* injecting content, scrolling the page, etc.. It's ugly.
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* jQuery Mobile uses this workaround. It's not ideal, but works.
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*
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* Modified to detect IE6
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* ========================= */
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var supportsFixedPosition = (function () {
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var ua = navigator.userAgent
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, platform = navigator.platform
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// Rendering engine is Webkit, and capture major version
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, wkmatch = ua.match( /AppleWebKit\/([0-9]+)/ )
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, wkversion = !!wkmatch && wkmatch[ 1 ]
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, ffmatch = ua.match( /Fennec\/([0-9]+)/ )
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, ffversion = !!ffmatch && ffmatch[ 1 ]
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, operammobilematch = ua.match( /Opera Mobi\/([0-9]+)/ )
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, omversion = !!operammobilematch && operammobilematch[ 1 ]
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, iematch = ua.match( /MSIE ([0-9]+)/ )
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, ieversion = !!iematch && iematch[ 1 ];
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return !(
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// iOS 4.3 and older : Platform is iPhone/Pad/Touch and Webkit version is less than 534 (ios5)
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((platform.indexOf( "iPhone" ) > -1 || platform.indexOf( "iPad" ) > -1 || platform.indexOf( "iPod" ) > -1 ) && wkversion && wkversion < 534) ||
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// Opera Mini
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(window.operamini && ({}).toString.call( window.operamini ) === "[object OperaMini]") ||
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(operammobilematch && omversion < 7458) ||
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//Android lte 2.1: Platform is Android and Webkit version is less than 533 (Android 2.2)
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(ua.indexOf( "Android" ) > -1 && wkversion && wkversion < 533) ||
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// Firefox Mobile before 6.0 -
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(ffversion && ffversion < 6) ||
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// WebOS less than 3
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("palmGetResource" in window && wkversion && wkversion < 534) ||
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// MeeGo
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(ua.indexOf( "MeeGo" ) > -1 && ua.indexOf( "NokiaBrowser/8.5.0" ) > -1) ||
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// IE6
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(ieversion && ieversion <= 6)
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);
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}());
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}(jQuery, window)); |