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- // ----------------------------------------------------------------------------
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- // Vegas - Fullscreen Backgrounds and Slideshows with jQuery.
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- // v1.3.5 - released 2014-10-13 19:56
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- // Licensed under the MIT license.
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- // http://vegas.jaysalvat.com/
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- // ----------------------------------------------------------------------------
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- // Copyright (C) 2010-2014 Jay Salvat
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- // http://jaysalvat.com/
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- // ----------------------------------------------------------------------------
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-
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-(function($) {
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- var $background = $("<img />").addClass("vegas-background"), $overlay = $("<div />").addClass("vegas-overlay"), $loading = $("<div />").addClass("vegas-loading"), $current = $(), paused = null, backgrounds = [], step = 0, delay = 5e3, walk = function() {}, timer, methods = {
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- init: function(settings) {
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- var options = {
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- src: getBackground(),
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- align: "center",
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- valign: "center",
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- fade: 0,
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- loading: true,
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- load: function() {},
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- complete: function() {}
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- };
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- $.extend(options, $.vegas.defaults.background, settings);
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- if (options.loading) {
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- loading();
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- }
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- var $new = $background.clone();
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- $new.css({
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- position: "fixed",
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- left: "0px",
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- top: "0px"
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- }).bind("load", function() {
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- if ($new == $current) {
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- return;
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- }
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- $(window).bind("load resize.vegas", function(e) {
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- resize($new, options);
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- });
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- if ($current.is("img")) {
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- $current.stop();
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- $new.hide().insertAfter($current).fadeIn(options.fade, function() {
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- $(".vegas-background").not(this).remove();
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- $("body").trigger("vegascomplete", [ this, step - 1 ]);
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- options.complete.apply($new, [ step - 1 ]);
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- });
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- } else {
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- $new.hide().prependTo("body").fadeIn(options.fade, function() {
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- $("body").trigger("vegascomplete", [ this, step - 1 ]);
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- options.complete.apply(this, [ step - 1 ]);
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- });
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- }
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- $current = $new;
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- resize($current, options);
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- if (options.loading) {
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- loaded();
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- }
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- $("body").trigger("vegasload", [ $current.get(0), step - 1 ]);
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- options.load.apply($current.get(0), [ step - 1 ]);
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- if (step) {
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- $("body").trigger("vegaswalk", [ $current.get(0), step - 1 ]);
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- options.walk.apply($current.get(0), [ step - 1 ]);
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- }
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- }).attr("src", options.src);
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- return $.vegas;
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- },
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- destroy: function(what) {
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- if (!what || what == "background") {
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- $(".vegas-background, .vegas-loading").remove();
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- $(window).unbind("*.vegas");
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- $current = $();
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- }
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- if (!what || what == "overlay") {
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- $(".vegas-overlay").remove();
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- }
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- clearInterval(timer);
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- return $.vegas;
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- },
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- overlay: function(settings) {
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- var options = {
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- src: null,
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- opacity: null
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- };
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- $.extend(options, $.vegas.defaults.overlay, settings);
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- $overlay.remove();
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- $overlay.css({
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- margin: "0",
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- padding: "0",
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- position: "fixed",
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- left: "0px",
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- top: "0px",
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- width: "100%",
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- height: "100%"
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- });
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- if (options.src === false) {
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- $overlay.css("backgroundImage", "none");
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- }
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- if (options.src) {
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- $overlay.css("backgroundImage", "url(" + options.src + ")");
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- }
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- if (options.opacity) {
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- $overlay.css("opacity", options.opacity);
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- }
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- $overlay.prependTo("body");
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- return $.vegas;
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- },
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- slideshow: function(settings, keepPause) {
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- var options = {
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- step: step,
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- delay: delay,
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- preload: false,
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- loading: true,
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- backgrounds: backgrounds,
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- walk: walk
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- };
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- $.extend(options, $.vegas.defaults.slideshow, settings);
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- if (options.backgrounds != backgrounds) {
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- if (!settings.step) {
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- options.step = 0;
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- }
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- if (!settings.walk) {
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- options.walk = function() {};
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- }
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- if (options.preload) {
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- $.vegas("preload", options.backgrounds);
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- }
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- }
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- backgrounds = options.backgrounds;
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- delay = options.delay;
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- step = options.step;
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- walk = options.walk;
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- clearInterval(timer);
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- if (!backgrounds.length) {
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- return $.vegas;
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- }
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- var doSlideshow = function() {
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- if (step < 0) {
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- step = backgrounds.length - 1;
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- }
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- if (step >= backgrounds.length || !backgrounds[step - 1]) {
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- step = 0;
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- }
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- var settings = backgrounds[step++];
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- settings.walk = options.walk;
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- settings.loading = options.loading;
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- if (typeof settings.fade == "undefined") {
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- settings.fade = options.fade;
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- }
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- if (settings.fade > options.delay) {
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- settings.fade = options.delay;
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- }
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- $.vegas(settings);
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- };
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- doSlideshow();
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- if (!keepPause) {
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- paused = false;
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- $("body").trigger("vegasstart", [ $current.get(0), step - 1 ]);
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- }
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- if (!paused) {
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- timer = setInterval(doSlideshow, options.delay);
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- }
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- return $.vegas;
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- },
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- next: function() {
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- var from = step;
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- if (step) {
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- $.vegas("slideshow", {
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- step: step
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- }, true);
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- $("body").trigger("vegasnext", [ $current.get(0), step - 1, from - 1 ]);
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- }
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- return $.vegas;
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- },
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- previous: function() {
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- var from = step;
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- if (step) {
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- $.vegas("slideshow", {
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- step: step - 2
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- }, true);
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- $("body").trigger("vegasprevious", [ $current.get(0), step - 1, from - 1 ]);
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- }
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- return $.vegas;
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- },
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- jump: function(s) {
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- var from = step;
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- if (step) {
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- $.vegas("slideshow", {
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- step: s
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- }, true);
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- $("body").trigger("vegasjump", [ $current.get(0), step - 1, from - 1 ]);
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- }
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- return $.vegas;
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- },
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- stop: function() {
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- var from = step;
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- step = 0;
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- paused = null;
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- clearInterval(timer);
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- $("body").trigger("vegasstop", [ $current.get(0), from - 1 ]);
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- return $.vegas;
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- },
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- pause: function() {
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- paused = true;
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- clearInterval(timer);
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- $("body").trigger("vegaspause", [ $current.get(0), step - 1 ]);
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- return $.vegas;
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- },
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- get: function(what) {
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- if (what === null || what == "background") {
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- return $current.get(0);
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- }
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- if (what == "overlay") {
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- return $overlay.get(0);
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- }
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- if (what == "step") {
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- return step - 1;
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- }
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- if (what == "paused") {
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- return paused;
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- }
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- },
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- preload: function(backgrounds) {
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- var cache = [];
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- for (var i in backgrounds) {
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- if (backgrounds[i].src) {
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- var cacheImage = document.createElement("img");
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- cacheImage.src = backgrounds[i].src;
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- cache.push(cacheImage);
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- }
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- }
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- return $.vegas;
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- }
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- };
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- function resize($img, settings) {
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- var options = {
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- align: "center",
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- valign: "center"
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- };
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- $.extend(options, settings);
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- if ($img.height() === 0) {
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- $img.load(function() {
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- resize($(this), settings);
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- });
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- return;
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- }
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- var vp = getViewportSize(), ww = vp.width, wh = vp.height, iw = $img.width(), ih = $img.height(), rw = wh / ww, ri = ih / iw, newWidth, newHeight, newLeft, newTop, properties;
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- if (rw > ri) {
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- newWidth = wh / ri;
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- newHeight = wh;
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- } else {
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- newWidth = ww;
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- newHeight = ww * ri;
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- }
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- properties = {
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- width: newWidth + "px",
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- height: newHeight + "px",
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- top: "auto",
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- bottom: "auto",
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- left: "auto",
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- right: "auto"
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- };
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- if (!isNaN(parseInt(options.valign, 10))) {
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- properties.top = 0 - (newHeight - wh) / 100 * parseInt(options.valign, 10) + "px";
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- } else if (options.valign == "top") {
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- properties.top = 0;
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- } else if (options.valign == "bottom") {
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- properties.bottom = 0;
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- } else {
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- properties.top = (wh - newHeight) / 2;
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- }
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- if (!isNaN(parseInt(options.align, 10))) {
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- properties.left = 0 - (newWidth - ww) / 100 * parseInt(options.align, 10) + "px";
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- } else if (options.align == "left") {
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- properties.left = 0;
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- } else if (options.align == "right") {
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- properties.right = 0;
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- } else {
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- properties.left = (ww - newWidth) / 2;
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- }
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- $img.css(properties);
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- }
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- function loading() {
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- $loading.prependTo("body").fadeIn();
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- }
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- function loaded() {
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- $loading.fadeOut("fast", function() {
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- $(this).remove();
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- });
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- }
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- function getBackground() {
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- if ($("body").css("backgroundImage")) {
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- return $("body").css("backgroundImage").replace(/url\("?(.*?)"?\)/i, "$1");
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- }
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- }
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- function getViewportSize() {
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- var elmt = window, prop = "inner";
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- if (!("innerWidth" in window)) {
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- elmt = document.documentElement || document.body;
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- prop = "client";
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- }
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- return {
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- width: elmt[prop + "Width"],
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- height: elmt[prop + "Height"]
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- };
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- }
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- $.vegas = function(method) {
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- if (methods[method]) {
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- return methods[method].apply(this, Array.prototype.slice.call(arguments, 1));
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- } else if (typeof method === "object" || !method) {
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- return methods.init.apply(this, arguments);
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- } else {
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- $.error("Method " + method + " does not exist");
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- }
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- };
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- $.vegas.defaults = {
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- background: {},
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- slideshow: {},
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- overlay: {}
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- };
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-})(jQuery);
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Jay Salvat
