/*!
// Infinite Scroll jQuery plugin
// copyright Paul Irish, licensed GPL & MIT
// version 1.5.110124
// home and docs: http://www.infinite-scroll.com
*/
(function($) {
$.fn.infinitescroll = function(options, callback) {
function debug() {
if (opts.debug) {
window.console && console.log.call(console, arguments)
}
}
function areSelectorsValid(opts) {
for (var key in opts) {
if (key.indexOf && key.indexOf("Selector") > -1 && $(opts[key]).length === 0) {
debug("Your " + key + " found no elements.");
return false
}
return true
}
}
function determinePath(path) {
if (path.match(/^(.*?)\b3\b(.*?$)/)) {
path = path.match(/^(.*?)\b3\b(.*?$)/).slice(1)
} else {
if (path.match(/^(.*?)3(.*?$)/)) {
if (path.match(/^(.*?page=)3(\/.*|$)/)) {
path = path.match(/^(.*?page=)3(\/.*|$)/).slice(1);
return path
}
debug("Trying backup next selector parse technique. Treacherous waters here, matey.");
path = path.match(/^(.*?)3(.*?$)/).slice(1)
} else {
if (path.match(/^(.*?page=)1(\/.*|$)/)) {
path = path.match(/^(.*?page=)1(\/.*|$)/).slice(1);
return path
}
if ($.isFunction(opts.pathParse)) {
return [path]
} else {
debug("Sorry, we couldn't parse your Next (Previous Posts) URL. Verify your the css selector points to the correct A tag. If you still get this error: yell, scream, and kindly ask for help at infinite-scroll.com.");
props.isInvalidPage = true
}
}
}
return path
}
function filterNav() {
opts.isFiltered = true;
return binder.trigger("error.infscr." + opts.infid, [302])
}
function hiddenHeight(element) {
var height = 0;
$(element).children().each(function() {
height = height + $(this).outerHeight(false)
});
return height
}
function generateInstanceID(element) {
var number = $(element).length + $(element).html().length + $(element).attr("class").length + $(element).attr("id").length;
opts.infid = number
}
function isNearBottom() {
if (opts.container.nodeName == "HTML") {
var pixelsFromWindowBottomToBottom = 0 + $(document).height() - ($(opts.container).scrollTop() || $(opts.container.ownerDocument.body).scrollTop()) - $(window).height()
} else {
var pixelsFromWindowBottomToBottom = 0 + hiddenHeight(opts.container) - $(opts.container).scrollTop() - $(opts.container).height()
}
debug("math:", pixelsFromWindowBottomToBottom, opts.pixelsFromNavToBottom);
return (pixelsFromWindowBottomToBottom - opts.bufferPx < opts.pixelsFromNavToBottom)
}
function showDoneMsg() {
props.loadingMsg.find("img").hide().parent().find("div").html(opts.donetext).animate({
opacity: 1
}, 2000, function() {
$(this).parent().fadeOut("normal")
});
opts.errorCallback()
}
function infscrSetup() {
if (opts.isDuringAjax || opts.isInvalidPage || opts.isDone || opts.isFiltered || opts.isPaused) {
return
}
if (!isNearBottom(opts, props)) {
return
}
$(document).trigger("retrieve.infscr." + opts.infid)
}
function kickOffAjax() {
opts.isDuringAjax = true;
props.loadingMsg.appendTo(opts.loadMsgSelector).show(opts.loadingMsgRevealSpeed, function() {
$(opts.navSelector).hide();
if (opts.currPage == 1) {
opts.currPage = 0;
}
opts.currPage+=3;
debug("heading into ajax", path);
box = $(opts.contentSelector).is("table") ? $("") : $("");
frag = document.createDocumentFragment();
if ($.isFunction(opts.pathParse)) {
desturl = opts.pathParse(path.join("3"), opts.currPage)
} else {
desturl = path.join(opts.currPage)
}
box.load(desturl + " " + opts.itemSelector, null, loadCallback)
})
}
function loadCallback() {
var total = $('#paginationtotal').attr("title");
if (opts.currPage >= total) {
showDoneMsg();
return false;
} else if (opts.isDone){
showDoneMsg();
return false
} else {
var children = box.children();
if (children.length == 0 || children.hasClass("error404")) {
return infscrError([404])
}
while (box[0].firstChild) {
frag.appendChild(box[0].firstChild)
}
$(opts.contentSelector)[0].appendChild(frag);
props.loadingMsg.fadeOut("normal");
if (opts.animate) {
var scrollTo = $(window).scrollTop() + $("#infscr-loading").height() + opts.extraScrollPx + "px";
$("html,body").animate({
scrollTop: scrollTo
}, 800, function() {
opts.isDuringAjax = false
})
}
callback.call($(opts.contentSelector)[0], children.get());
if (!opts.animate) {
opts.isDuringAjax = false
}
}
}
function initPause(pauseValue) {
if (pauseValue == "pause") {
opts.isPaused = true
} else {
if (pauseValue == "resume") {
opts.isPaused = false
} else {
opts.isPaused = !opts.isPaused
}
}
debug("Paused: " + opts.isPaused);
return false
}
function infscrError(xhr) {
if (!opts.isDone && xhr == 404) {
debug("Page not found. Self-destructing...");
showDoneMsg();
opts.isDone = true;
opts.currPage = 1;
binder.unbind("scroll.infscr." + opts.infid);
$(document).unbind("retrieve.infscr." + opts.infid)
}
if (opts.isFiltered && xhr == 302) {
debug("Filtered. Going to next instance...");
opts.isDone = true;
opts.currPage = 1;
opts.isPaused = false;
binder.unbind("scroll.infscr." + opts.infid, infscrSetup).unbind("pause.infscr." + opts.infid).unbind("filter.infscr." + opts.infid).unbind("error.infscr." + opts.infid);
$(document).unbind("retrieve.infscr." + opts.infid, kickOffAjax)
}
}
$.browser.ie6 = $.browser.msie && $.browser.version < 7;
var opts = $.extend({}, $.infinitescroll.defaults, options),
props = $.infinitescroll,
box, frag, desturl, thisPause, errorStatus;
callback = callback ||
function() {};
if (!areSelectorsValid(opts)) {
return false
}
opts.container = opts.container || document.documentElement;
opts.contentSelector = opts.contentSelector || this;
if (opts.infid == 0) {
generateInstanceID(opts.contentSelector)
}
opts.loadMsgSelector = opts.loadMsgSelector || opts.contentSelector;
var relurl = /(.*?\/\/).*?(\/.*)/,
path = $(opts.nextSelector).attr("href");
if (!path) {
debug("Navigation selector not found");
return
}
path = determinePath(path);
props.loadingMsg = $('
' + opts.loadingText + "