/*!
* Infinite Ajax Scroll, a jQuery plugin
* Version 1.0.2
* https://github.com/webcreate/infinite-ajax-scroll
*
* Copyright (c) 2011-2013 Jeroen Fiege
* Licensed under MIT:
* https://raw.github.com/webcreate/infinite-ajax-scroll/master/MIT-LICENSE.txt
*/
(function (e) {
"use strict";
Date.now = Date.now || function () {
return+(new Date)
}, e.ias = function (t) {
function u() {
var t;
i.onChangePage(function (e, t, r) {
s && s.setPage(e, r), n.onPageChange.call(this, e, r, t)
});
if (n.triggerPageThreshold > 0)a(); else if (e(n.next).attr("href")) {
var u = r.getCurrentScrollOffset(n.scrollContainer);
E(function () {
p(u)
})
}
return s && s.havePage() && (l(), t = s.getPage(), r.forceScrollTop(function () {
var n;
t > 1 ? (v(t), n = h(!0), e("html, body").scrollTop(n)) : a()
})), o
}
function a() {
c(), n.scrollContainer.scroll(f)
}
function f() {
var e, t;
e = r.getCurrentScrollOffset(n.scrollContainer), t = h(), e >= t && (m() >= n.triggerPageThreshold ? (l(), E(function () {
p(e)
})) : p(e))
}
function l() {
n.scrollContainer.unbind("scroll", f)
}
function c() {
e(n.pagination).hide()
}
function h(t) {
var r, i;
return r = e(n.container).find(n.item).last(), r.size() === 0 ? 0 : (i = r.offset().top + r.height(), t || (i += n.thresholdMargin), i)
}
function p(t, r) {
var s;
s = e(n.next).attr("href");
if (!s)return n.noneleft && e(n.container).find(n.item).last().after(n.noneleft), l();
if (n.beforePageChange && e.isFunction(n.beforePageChange) && n.beforePageChange(t, s) === !1)return;
i.pushPages(t, s), l(), y(), d(s, function (t, i) {
var o = n.onLoadItems.call(this, i), u;
o !== !1 && (e(i).hide(), u = e(n.container).find(n.item).last(), u.after(i), e(i).fadeIn()), s = e(n.next, t).attr("href"), e(n.pagination).replaceWith(e(n.pagination, t)), b(), c(), s ? a() : l(), n.onRenderComplete.call(this, i), r && r.call(this)
})
}
function d(t, r, i) {
var s = [], o, u = Date.now(), a, f;
i = i || n.loaderDelay, e.get(t, null, function (t) {
o = e(n.container, t).eq(0), 0 === o.length && (o = e(t).filter(n.container).eq(0)), o && o.find(n.item).each(function () {
s.push(this)
}), r && (f = this, a = Date.now() - u, a < i ? setTimeout(function () {
r.call(f, t, s)
}, i - a) : r.call(f, t, s))
}, "html")
}
function v(t) {
var n = h(!0);
n > 0 && p(n, function () {
l(), i.getCurPageNum(n) + 1 < t ? (v(t), e("html,body").animate({scrollTop: n}, 400, "swing")) : (e("html,body").animate({scrollTop: n}, 1e3, "swing"), a())
})
}
function m() {
var e = r.getCurrentScrollOffset(n.scrollContainer);
return i.getCurPageNum(e)
}
function g() {
var t = e(".ias_loader");
return t.size() === 0 && (t = e(' "), t.hide()), t
}
function y() {
var t = g(), r;
n.customLoaderProc !== !1 ? n.customLoaderProc(t) : (r = e(n.container).find(n.item).last(), r.after(t), t.fadeIn())
}
function b() {
var e = g();
e.remove()
}
function w(t) {
var r = e(".ias_trigger");
return r.size() === 0 && (r = e('"), r.hide()), e("a", r).unbind("click").bind("click", function () {
return S(), t.call(), !1
}), r
}
function E(t) {
var r = w(t), i;
n.customTriggerProc !== !1 ? n.customTriggerProc(r) : (i = e(n.container).find(n.item).last(), i.after(r), r.fadeIn())
}
function S() {
var e = w();
e.remove()
}
var n = e.extend({}, e.ias.defaults, t), r = new e.ias.util, i = new e.ias.paging(n.scrollContainer), s = n.history ? new e.ias.history : !1, o = this;
u()
}, e.ias.defaults = {container: "#container", scrollContainer: e(window), item: ".item", pagination: "#pagination", next: ".next", noneleft: !1, loader: '
', loaderDelay: 600, triggerPageThreshold: 3, trigger: "Load more items", thresholdMargin: 0, history: !0, onPageChange: function () {
}, beforePageChange: function () {
}, onLoadItems: function () {
}, onRenderComplete: function () {
}, customLoaderProc: !1, customTriggerProc: !1}, e.ias.util = function () {
function i() {
e(window).load(function () {
t = !0
})
}
var t = !1, n = !1, r = this;
i(), this.forceScrollTop = function (i) {
e("html,body").scrollTop(0), n || (t ? (i.call(), n = !0) : setTimeout(function () {
r.forceScrollTop(i)
}, 1))
}, this.getCurrentScrollOffset = function (e) {
var t, n;
return e.get(0) === window ? t = e.scrollTop() : t = e.offset().top, n = e.height(), t + n
}
}, e.ias.paging = function () {
function s() {
e(window).scroll(o)
}
function o() {
var t, s, o, f, l;
t = i.getCurrentScrollOffset(e(window)), s = u(t), o = a(t), r !== s && (f = o[0], l = o[1], n.call({}, s, f, l)), r = s
}
function u(e) {
for (var n = t.length - 1; n > 0; n--)if (e > t[n][0])return n + 1;
return 1
}
function a(e) {
for (var n = t.length - 1; n >= 0; n--)if (e > t[n][0])return t[n];
return null
}
var t = [
[0, document.location.toString()]
], n = function () {
}, r = 1, i = new e.ias.util;
s(), this.getCurPageNum = function (t) {
return t = t || i.getCurrentScrollOffset(e(window)), u(t)
}, this.onChangePage = function (e) {
n = e
}, this.pushPages = function (e, n) {
t.push([e, n])
}
}, e.ias.history = function () {
function n() {
t = !!(window.history && history.pushState && history.replaceState), t = !1
}
var e = !1, t = !1;
n(), this.setPage = function (e, t) {
this.updateState({page: e}, "", t)
}, this.havePage = function () {
return this.getState() !== !1
}, this.getPage = function () {
var e;
return this.havePage() ? (e = this.getState(), e.page) : 1
}, this.getState = function () {
var e, n, r;
if (t) {
n = history.state;
if (n && n.ias)return n.ias
} else {
e = window.location.hash.substring(0, 7) === "#/page/";
if (e)return r = parseInt(window.location.hash.replace("#/page/", ""), 10), {page: r}
}
return!1
}, this.updateState = function (t, n, r) {
e ? this.replaceState(t, n, r) : this.pushState(t, n, r)
}, this.pushState = function (n, r, i) {
var s;
t ? history.pushState({ias: n}, r, i) : (s = n.page > 0 ? "#/page/" + n.page : "", window.location.hash = s), e = !0
}, this.replaceState = function (e, n, r) {
t ? history.replaceState({ias: e}, n, r) : this.pushState(e, n, r)
}
}
})(jQuery);