/* jQuery.preloader - v0.95 - K Reeve aka BinaryKitten
*
* v0.95
*   # Note - keeping below v1 as really not sure that I consider it public usable.
*   # But it saying that it does the job it was intended to do.
*   Added Completion of loading callback.
*   Main Reworking With Thanks to Remy Sharp of jQuery for Designers
*
*
* v0.9
*   Fixed .toString being .toSteing
*
* v0.8
*       Fixed sheet.href being null error (was causing issues in FF3RC1)
*
* v0.7
*       Remade the preLoadImages from jQuery to DOM
*
* v0.6
*       Fixed IE6 Compatability!
*       Moved from jQuery to DOM
*
* v0.5
*       Shifted the additionalimages loader in the preLoadAllImages so it wasn't called multiple times
*       Created secondary .preLoadImages to handle additionalimages and so it can be called on itself
*/
 
(function ($) {
$.preLoadImages = function(imageList,callback) {
var pic = [], i, total, loaded = 0;
if (typeof imageList != 'undefined') {
if ($.isArray(imageList)) {
total = imageList.length; // used later
for (i=0; i < total; i++) {
pic[i] = new Image();
pic[i].onload = function() {
loaded++; // should never hit a race condition due to JS's non-threaded nature
if (loaded == total) {
if ($.isFunction(callback)) {
callback();
}
}
};
pic[i].src = imageList[i];
}
}
else {
pic[0] = new Image();
pic[0].onload = function() {
if ($.isFunction(callback)) {
callback();
}
}
pic[0].src = imageList;
}
}
pic = undefined;
};
 
$.preLoadCSSImages = function(callback) {
var pic = [], i, imageList = [], loaded = 0, total, regex = new RegExp("url\((.*)\)",'i'),spl;
var cssSheets = document.styleSheets, path,myRules,Rule,match,txt,img,sheetIdx,ruleIdx;
for (sheetIdx=0;sheetIdx < cssSheets.length;sheetIdx++){
var sheet = cssSheets[sheetIdx];
if (typeof sheet.href == 'string' && sheet.href.length > 0) {
spl = sheet.href.split('/');spl.pop();path = spl.join('/')+'/';
}
else {
path = './';
}
myRules = sheet.cssRules ? sheet.cssRules : sheet.rules;
for (ruleIdx=0;ruleIdx < myRules.length;ruleIdx++) {
Rule = myRules[ruleIdx];
txt = Rule.cssText ? Rule.cssText : Rule.style.cssText;
match = regex.exec(txt);
if (match != null) {
img = match[1].substring(1,match[1].indexOf(')',1));
if (img.substring(0,4) == 'http') {
imageList[imageList.length] = img;
}
else if ( match[1].substring(1,2) == '/') {
var p2 = path.split('/');p2.pop();p2.pop();p2x = p2.join("/");
imageList[imageList.length] = p2x+img;
}
else {
imageList[imageList.length] = path+img;
}
}
};
};
 
total = imageList.length; // used later
for (i=0; i < total; i++) {
pic[i] = new Image();
pic[i].onload = function() {
loaded++; // should never hit a race condition due to JS's non-threaded nature
if (loaded == total) {
if ($.isFunction(callback)) {
callback();
}
}
};
pic[i].src = imageList[i];
}
 
};
$.preLoadAllImages = function(imageList,callback) {
if (typeof imageList != 'undefined') {
if ($.isFunction(imageList)) {
callback = imageList;
}
else if (!$.isArray(imageList)) {
imageList = [imageList];
}
}
$.preLoadCSSImages(function(){
if (imageList.length > 0) {
$.preLoadImages(imageList,function(){
callback();
});
}
else {
callback();
}
});
}
})(jQuery);