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// ----------------------------------------------------------------------------
// Vegas - Fullscreen Backgrounds and Slideshows with jQuery.
// v1.3.4 - released 2013-12-16 13:28
// Licensed under the MIT license.
// http://vegas.jaysalvat.com/
// ----------------------------------------------------------------------------
// Copyright (C) 2010-2013 Jay Salvat
// http://jaysalvat.com/
// ----------------------------------------------------------------------------
(function($) {
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 = {
init: function(settings) {
var options = {
src: getBackground(),
align: "center",
valign: "center",
fade: 0,
loading: true,
load: function() {},
complete: function() {}
};
$.extend(options, $.vegas.defaults.background, settings);
if (options.loading) {
loading();
}
var $new = $background.clone();
$new.css({
position: "fixed",
left: "0px",
top: "0px"
}).bind("load", function() {
if ($new == $current) {
return;
}
$(window).bind("load resize.vegas", function(e) {
resize($new, options);
});
if ($current.is("img")) {
$current.stop();
$new.hide().insertAfter($current).fadeIn(options.fade, function() {
$(".vegas-background").not(this).remove();
$("body").trigger("vegascomplete", [ this, step - 1 ]);
options.complete.apply($new, [ step - 1 ]);
});
} else {
$new.hide().prependTo("body").fadeIn(options.fade, function() {
$("body").trigger("vegascomplete", [ this, step - 1 ]);
options.complete.apply(this, [ step - 1 ]);
});
}
$current = $new;
resize($current, options);
if (options.loading) {
loaded();
}
$("body").trigger("vegasload", [ $current.get(0), step - 1 ]);
options.load.apply($current.get(0), [ step - 1 ]);
if (step) {
$("body").trigger("vegaswalk", [ $current.get(0), step - 1 ]);
options.walk.apply($current.get(0), [ step - 1 ]);
}
}).attr("src", options.src);
return $.vegas;
},
destroy: function(what) {
if (!what || what == "background") {
$(".vegas-background, .vegas-loading").remove();
$(window).unbind("*.vegas");
$current = $();
}
if (!what || what == "overlay") {
$(".vegas-overlay").remove();
}
clearInterval(timer);
return $.vegas;
},
overlay: function(settings) {
var options = {
src: null,
opacity: null
};
$.extend(options, $.vegas.defaults.overlay, settings);
$overlay.remove();
$overlay.css({
margin: "0",
padding: "0",
position: "fixed",
left: "0px",
top: "0px",
width: "100%",
height: "100%"
});
if (options.src === false) {
$overlay.css("backgroundImage", "none");
}
if (options.src) {
$overlay.css("backgroundImage", "url(" + options.src + ")");
}
if (options.opacity) {
$overlay.css("opacity", options.opacity);
}
$overlay.prependTo("body");
return $.vegas;
},
slideshow: function(settings, keepPause) {
var options = {
step: step,
delay: delay,
preload: false,
loading: true,
backgrounds: backgrounds,
walk: walk
};
$.extend(options, $.vegas.defaults.slideshow, settings);
if (options.backgrounds != backgrounds) {
if (!settings.step) {
options.step = 0;
}
if (!settings.walk) {
options.walk = function() {};
}
if (options.preload) {
$.vegas("preload", options.backgrounds);
}
}
backgrounds = options.backgrounds;
delay = options.delay;
step = options.step;
walk = options.walk;
clearInterval(timer);
if (!backgrounds.length) {
return $.vegas;
}
var doSlideshow = function() {
if (step < 0) {
step = backgrounds.length - 1;
}
if (step >= backgrounds.length || !backgrounds[step - 1]) {
step = 0;
}
var settings = backgrounds[step++];
settings.walk = options.walk;
settings.loading = options.loading;
if (typeof settings.fade == "undefined") {
settings.fade = options.fade;
}
if (settings.fade > options.delay) {
settings.fade = options.delay;
}
$.vegas(settings);
};
doSlideshow();
if (!keepPause) {
paused = false;
$("body").trigger("vegasstart", [ $current.get(0), step - 1 ]);
}
if (!paused) {
timer = setInterval(doSlideshow, options.delay);
}
return $.vegas;
},
next: function() {
var from = step;
if (step) {
$.vegas("slideshow", {
step: step
}, true);
$("body").trigger("vegasnext", [ $current.get(0), step - 1, from - 1 ]);
}
return $.vegas;
},
previous: function() {
var from = step;
if (step) {
$.vegas("slideshow", {
step: step - 2
}, true);
$("body").trigger("vegasprevious", [ $current.get(0), step - 1, from - 1 ]);
}
return $.vegas;
},
jump: function(s) {
var from = step;
if (step) {
$.vegas("slideshow", {
step: s
}, true);
$("body").trigger("vegasjump", [ $current.get(0), step - 1, from - 1 ]);
}
return $.vegas;
},
stop: function() {
var from = step;
step = 0;
paused = null;
clearInterval(timer);
$("body").trigger("vegasstop", [ $current.get(0), from - 1 ]);
return $.vegas;
},
pause: function() {
paused = true;
clearInterval(timer);
$("body").trigger("vegaspause", [ $current.get(0), step - 1 ]);
return $.vegas;
},
get: function(what) {
if (what === null || what == "background") {
return $current.get(0);
}
if (what == "overlay") {
return $overlay.get(0);
}
if (what == "step") {
return step - 1;
}
if (what == "paused") {
return paused;
}
},
preload: function(backgrounds) {
var cache = [];
for (var i in backgrounds) {
if (backgrounds[i].src) {
var cacheImage = document.createElement("img");
cacheImage.src = backgrounds[i].src;
cache.push(cacheImage);
}
}
return $.vegas;
}
};
function resize($img, settings) {
var options = {
align: "center",
valign: "center"
};
$.extend(options, settings);
if ($img.height() === 0) {
$img.load(function() {
resize($(this), settings);
});
return;
}
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;
if (rw > ri) {
newWidth = wh / ri;
newHeight = wh;
} else {
newWidth = ww;
newHeight = ww * ri;
}
properties = {
width: newWidth + "px",
height: newHeight + "px",
top: "auto",
bottom: "auto",
left: "auto",
right: "auto"
};
if (!isNaN(parseInt(options.valign, 10))) {
properties.top = 0 - (newHeight - wh) / 100 * parseInt(options.valign, 10) + "px";
} else if (options.valign == "top") {
properties.top = 0;
} else if (options.valign == "bottom") {
properties.bottom = 0;
} else {
properties.top = (wh - newHeight) / 2;
}
if (!isNaN(parseInt(options.align, 10))) {
properties.left = 0 - (newWidth - ww) / 100 * parseInt(options.align, 10) + "px";
} else if (options.align == "left") {
properties.left = 0;
} else if (options.align == "right") {
properties.right = 0;
} else {
properties.left = (ww - newWidth) / 2;
}
$img.css(properties);
}
function loading() {
$loading.prependTo("body").fadeIn();
}
function loaded() {
$loading.fadeOut("fast", function() {
$(this).remove();
});
}
function getBackground() {
if ($("body").css("backgroundImage")) {
return $("body").css("backgroundImage").replace(/url\("?(.*?)"?\)/i, "$1");
}
}
function getViewportSize() {
var elmt = window, prop = "inner";
if (!("innerWidth" in window)) {
elmt = document.documentElement || document.body;
prop = "client";
}
return {
width: elmt[prop + "Width"],
height: elmt[prop + "Height"]
};
}
$.vegas = function(method) {
if (methods[method]) {
return methods[method].apply(this, Array.prototype.slice.call(arguments, 1));
} else if (typeof method === "object" || !method) {
return methods.init.apply(this, arguments);
} else {
$.error("Method " + method + " does not exist");
}
};
$.vegas.defaults = {
background: {},
slideshow: {},
overlay: {}
};
})(jQuery);