https://ban-inc.jp/wp-content/themes/ban/js/jquery.autopager-1.0.1.js

1/*
2 * jQuery.autopager v1.0.0
3 *
4 * Copyright (c) 2009 lagos
5 * Dual licensed under the MIT and GPL licenses.
6 *
7 * http://lagoscript.org
8 */
9(function($) {
10	var window = this, options = {},
11		content, currentUrl, nextUrl,
12		active = false,
13		defaults = {
14			autoLoad: true,
15			page: 1,
16			content: '.content',
17			link: 'a[rel=next]',
18			insertBefore: null, 
19			appendTo: null, 
20			start: function() {},
21			load: function() {},
22			disabled: false
23		};
24
25	$.autopager = function(_options) {
26		var autopager = this.autopager;
27
28		if (typeof _options === 'string' && $.isFunction(autopager[_options])) {
29			var args = Array.prototype.slice.call(arguments, 1),
30				value = autopager[_options].apply(autopager, args);
31
32			return value === autopager || value === undefined ? this : value;
33		}
34
35		_options = $.extend({}, defaults, _options);
36		autopager.option(_options);
37
38		content = $(_options.content).filter(':last');
39		if (content.length) {
40			if (!_options.insertBefore && !_options.appendTo) {
41				var insertBefore = content.next();
42				if (insertBefore.length) {
43					set('insertBefore', insertBefore);
44				} else {
45					set('appendTo', content.parent());
46				}
47			}
48		}
49
50		setUrl();
51
52		return this;
53	};
54
55	$.extend($.autopager, {
56		option: function(key, value) {
57			var _options = key;
58
59			if (typeof key === "string") {
60				if (value === undefined) {
61					return options[key];
62				}
63				_options = {};
64				_options[key] = value;
65			}
66
67			$.each(_options, function(key, value) {
68				set(key, value);
69			});
70			return this;
71		},
72
73		enable: function() {
74			set('disabled', false);
75			return this;
76		},
77
78		disable: function() {
79			set('disabled', true);
80			return this;
81		},
82
83		destroy: function() {
84			this.autoLoad(false);
85			options = {};
86			content = currentUrl = nextUrl = undefined;
87			return this;
88		},
89
90		autoLoad: function(value) {
91			return this.option('autoLoad', value);
92		},
93
94		load: function() {
95			if (active || !nextUrl || options.disabled) {
96				return;
97			}
98
99			active = true;
100			options.start(currentHash(), nextHash());
101			$.get(nextUrl, insertContent);
102			return this;
103		}
104
105	});
106
107	function set(key, value) {
108		switch (key) {
109			case 'autoLoad':
110				if (value && !options.autoLoad) {
111					$(window).scroll(loadOnScroll);
112				} else if (!value && options.autoLoad) {
113					$(window).unbind('scroll', loadOnScroll);
114				}
115				break;
116			case 'insertBefore':
117				if (value) {
118					options.appendTo = null;
119				}
120				break
121			case 'appendTo':
122				if (value) {
123					options.insertBefore = null;
124				}
125				break
126		}
127		options[key] = value;
128	}
129
130	function setUrl(context) {
131		currentUrl = nextUrl || window.location.href;
132		nextUrl = $(options.link, context).attr('href');
133	}
134
135	function loadOnScroll() {
136		if (content.offset().top + content.height() < $(document).scrollTop() + $(window).height()) {
137			$.autopager.load();
138		}
139	}
140
141	function insertContent(res) {
142		var _options = options,
143			nextPage = $('<div/>').append(res.replace(/<script(.|\s)*?\/script>/g, "")),
144			nextContent = nextPage.find(_options.content); 
145
146		set('page', _options.page + 1);
147		setUrl(nextPage);
148		if (nextContent.length) {
149			if (_options.insertBefore) {
150				nextContent.insertBefore(_options.insertBefore);
151			} else {
152				nextContent.appendTo(_options.appendTo);
153			}
154			_options.load.call(nextContent.get(), currentHash(), nextHash());
155			content = nextContent.filter(':last');
156		}
157		active = false;
158	}
159
160	function currentHash() {
161		return {
162			page: options.page,
163			url: currentUrl
164		};
165	}
166
167	function nextHash() {
168		return {
169			page: options.page + 1,
170			url: nextUrl
171		};
172	}
173})(jQuery);