/
jquery.history.js
181 lines (164 loc) · 5.46 KB
/
jquery.history.js
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
/*
* jQuery history plugin
*
* Copyright (c) 2006-2009 Taku Sano (Mikage Sawatari)
* Copyright (c) 2010 Takayuki Miwa
*
* Licensed under the MIT License:
* http://www.opensource.org/licenses/mit-license.php
*/
(function($) {
var locationWrapper = {
put: function(hash, win) {
(win || window).location.hash = this.encoder(hash);
},
get: function(win) {
var hash = ((win || window).location.hash).replace(/^#/, '');
try {
return $.browser.mozilla ? hash : decodeURIComponent(hash);
}
catch (error) {
return hash;
}
},
encoder: encodeURIComponent
};
var iframeWrapper = {
id: "__jQuery_history",
init: function() {
var html = '<iframe id="'+ this.id +'" style="display:none" src="javascript:false;" />';
$("body").prepend(html);
return this;
},
_document: function() {
return $("#"+ this.id)[0].contentWindow.document;
},
put: function(hash) {
var doc = this._document();
doc.open();
doc.close();
locationWrapper.put(hash, doc);
},
get: function() {
return locationWrapper.get(this._document());
}
};
function initObjects(options) {
options = $.extend({
unescape: false
}, options || {});
locationWrapper.encoder = encoder(options.unescape);
function encoder(unescape_) {
if(unescape_ === true) {
return function(hash){ return hash; };
}
if(typeof unescape_ == "string" &&
(unescape_ = partialDecoder(unescape_.split("")))
|| typeof unescape_ == "function") {
return function(hash) { return unescape_(encodeURIComponent(hash)); };
}
return encodeURIComponent;
}
function partialDecoder(chars) {
var re = new RegExp($.map(chars, encodeURIComponent).join("|"), "ig");
return function(enc) { return enc.replace(re, decodeURIComponent); };
}
}
var implementations = {};
implementations.base = {
callback: undefined,
type: undefined,
check: function() {},
load: function(hash) {},
init: function(callback, options) {
initObjects(options);
self.callback = callback;
self._options = options;
self._init();
},
_init: function() {},
_options: {}
};
implementations.timer = {
_appState: undefined,
_init: function() {
var current_hash = locationWrapper.get();
self._appState = current_hash;
self.callback(current_hash);
setInterval(self.check, 100);
},
check: function() {
var current_hash = locationWrapper.get();
if(current_hash != self._appState) {
self._appState = current_hash;
self.callback(current_hash);
}
},
load: function(hash) {
if(hash != self._appState) {
locationWrapper.put(hash);
self._appState = hash;
}
self.callback(hash);
}
};
implementations.iframeTimer = {
_appState: undefined,
_init: function() {
var current_hash = locationWrapper.get();
self._appState = current_hash;
iframeWrapper.init().put(current_hash);
self.callback(current_hash);
setInterval(self.check, 100);
},
check: function() {
var iframe_hash = iframeWrapper.get(),
location_hash = locationWrapper.get();
if (location_hash != iframe_hash) {
if (location_hash == self._appState) { // user used Back or Forward button
self._appState = iframe_hash;
locationWrapper.put(iframe_hash);
self.callback(iframe_hash);
} else { // user loaded new bookmark
self._appState = location_hash;
iframeWrapper.put(location_hash);
self.callback(location_hash);
}
}
},
load: function(hash) {
if(hash != self._appState) {
locationWrapper.put(hash);
iframeWrapper.put(hash);
self._appState = hash;
}
self.callback(hash);
}
};
implementations.hashchangeEvent = {
_init: function() {
self.callback(locationWrapper.get());
$(window).bind('hashchange', self.check);
},
check: function() {
self.callback(locationWrapper.get());
},
load: function(hash) {
if(locationWrapper.get() == hash) {
self.callback(locationWrapper.get());
} else {
locationWrapper.put(hash);
}
}
};
var self = $.extend({}, implementations.base);
if($.browser.msie && ($.browser.version < 8 || document.documentMode < 8)) {
self.type = 'iframeTimer';
} else if("onhashchange" in window) {
self.type = 'hashchangeEvent';
} else {
self.type = 'timer';
}
$.extend(self, implementations[self.type]);
$.history = self;
})(jQuery);