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| 1 | +/* |
| 2 | + * jQuery history plugin |
| 3 | + * |
| 4 | + * The MIT License |
| 5 | + * |
| 6 | + * Copyright (c) 2006-2009 Taku Sano (Mikage Sawatari) |
| 7 | + * Copyright (c) 2010 Takayuki Miwa |
| 8 | + * |
| 9 | + * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 10 | + * of this software and associated documentation files (the "Software"), to deal |
| 11 | + * in the Software without restriction, including without limitation the rights |
| 12 | + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| 13 | + * copies of the Software, and to permit persons to whom the Software is |
| 14 | + * furnished to do so, subject to the following conditions: |
| 15 | + * |
| 16 | + * The above copyright notice and this permission notice shall be included in |
| 17 | + * all copies or substantial portions of the Software. |
| 18 | + * |
| 19 | + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 20 | + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 21 | + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| 22 | + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 23 | + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 24 | + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| 25 | + * THE SOFTWARE. |
| 26 | + */ |
| 27 | + |
| 28 | +(function($) { |
| 29 | + var locationWrapper = { |
| 30 | + put: function(hash, win) { |
| 31 | + (win || window).location.hash = this.encoder(hash); |
| 32 | + }, |
| 33 | + get: function(win) { |
| 34 | + var hash = ((win || window).location.hash).replace(/^#/, ''); |
| 35 | + try { |
| 36 | + return $.browser.mozilla ? hash : decodeURIComponent(hash); |
| 37 | + } |
| 38 | + catch (error) { |
| 39 | + return hash; |
| 40 | + } |
| 41 | + }, |
| 42 | + encoder: encodeURIComponent |
| 43 | + }; |
| 44 | + |
| 45 | + var iframeWrapper = { |
| 46 | + id: "__jQuery_history", |
| 47 | + init: function() { |
| 48 | + var html = '<iframe id="'+ this.id +'" style="display:none" src="javascript:false;" />'; |
| 49 | + $("body").prepend(html); |
| 50 | + return this; |
| 51 | + }, |
| 52 | + _document: function() { |
| 53 | + return $("#"+ this.id)[0].contentWindow.document; |
| 54 | + }, |
| 55 | + put: function(hash) { |
| 56 | + var doc = this._document(); |
| 57 | + doc.open(); |
| 58 | + doc.close(); |
| 59 | + locationWrapper.put(hash, doc); |
| 60 | + }, |
| 61 | + get: function() { |
| 62 | + return locationWrapper.get(this._document()); |
| 63 | + } |
| 64 | + }; |
| 65 | + |
| 66 | + function initObjects(options) { |
| 67 | + options = $.extend({ |
| 68 | + unescape: false |
| 69 | + }, options || {}); |
| 70 | + |
| 71 | + locationWrapper.encoder = encoder(options.unescape); |
| 72 | + |
| 73 | + function encoder(unescape_) { |
| 74 | + if(unescape_ === true) { |
| 75 | + return function(hash){ return hash; }; |
| 76 | + } |
| 77 | + if(typeof unescape_ == "string" && |
| 78 | + (unescape_ = partialDecoder(unescape_.split(""))) |
| 79 | + || typeof unescape_ == "function") { |
| 80 | + return function(hash) { return unescape_(encodeURIComponent(hash)); }; |
| 81 | + } |
| 82 | + return encodeURIComponent; |
| 83 | + } |
| 84 | + |
| 85 | + function partialDecoder(chars) { |
| 86 | + var re = new RegExp($.map(chars, encodeURIComponent).join("|"), "ig"); |
| 87 | + return function(enc) { return enc.replace(re, decodeURIComponent); }; |
| 88 | + } |
| 89 | + } |
| 90 | + |
| 91 | + var implementations = {}; |
| 92 | + |
| 93 | + implementations.base = { |
| 94 | + callback: undefined, |
| 95 | + type: undefined, |
| 96 | + |
| 97 | + check: function() {}, |
| 98 | + load: function(hash) {}, |
| 99 | + init: function(callback, options) { |
| 100 | + initObjects(options); |
| 101 | + self.callback = callback; |
| 102 | + self._options = options; |
| 103 | + self._init(); |
| 104 | + }, |
| 105 | + |
| 106 | + _init: function() {}, |
| 107 | + _options: {} |
| 108 | + }; |
| 109 | + |
| 110 | + implementations.timer = { |
| 111 | + _appState: undefined, |
| 112 | + _init: function() { |
| 113 | + var current_hash = locationWrapper.get(); |
| 114 | + self._appState = current_hash; |
| 115 | + self.callback(current_hash); |
| 116 | + setInterval(self.check, 100); |
| 117 | + }, |
| 118 | + check: function() { |
| 119 | + var current_hash = locationWrapper.get(); |
| 120 | + if(current_hash != self._appState) { |
| 121 | + self._appState = current_hash; |
| 122 | + self.callback(current_hash); |
| 123 | + } |
| 124 | + }, |
| 125 | + load: function(hash) { |
| 126 | + if(hash != self._appState) { |
| 127 | + locationWrapper.put(hash); |
| 128 | + self._appState = hash; |
| 129 | + self.callback(hash); |
| 130 | + } |
| 131 | + } |
| 132 | + }; |
| 133 | + |
| 134 | + implementations.iframeTimer = { |
| 135 | + _appState: undefined, |
| 136 | + _init: function() { |
| 137 | + var current_hash = locationWrapper.get(); |
| 138 | + self._appState = current_hash; |
| 139 | + iframeWrapper.init().put(current_hash); |
| 140 | + self.callback(current_hash); |
| 141 | + setInterval(self.check, 100); |
| 142 | + }, |
| 143 | + check: function() { |
| 144 | + var iframe_hash = iframeWrapper.get(), |
| 145 | + location_hash = locationWrapper.get(); |
| 146 | + |
| 147 | + if (location_hash != iframe_hash) { |
| 148 | + if (location_hash == self._appState) { // user used Back or Forward button |
| 149 | + self._appState = iframe_hash; |
| 150 | + locationWrapper.put(iframe_hash); |
| 151 | + self.callback(iframe_hash); |
| 152 | + } else { // user loaded new bookmark |
| 153 | + self._appState = location_hash; |
| 154 | + iframeWrapper.put(location_hash); |
| 155 | + self.callback(location_hash); |
| 156 | + } |
| 157 | + } |
| 158 | + }, |
| 159 | + load: function(hash) { |
| 160 | + if(hash != self._appState) { |
| 161 | + locationWrapper.put(hash); |
| 162 | + iframeWrapper.put(hash); |
| 163 | + self._appState = hash; |
| 164 | + self.callback(hash); |
| 165 | + } |
| 166 | + } |
| 167 | + }; |
| 168 | + |
| 169 | + implementations.hashchangeEvent = { |
| 170 | + _init: function() { |
| 171 | + self.callback(locationWrapper.get()); |
| 172 | + $(window).bind('hashchange', self.check); |
| 173 | + }, |
| 174 | + check: function() { |
| 175 | + self.callback(locationWrapper.get()); |
| 176 | + }, |
| 177 | + load: function(hash) { |
| 178 | + locationWrapper.put(hash); |
| 179 | + } |
| 180 | + }; |
| 181 | + |
| 182 | + var self = $.extend({}, implementations.base); |
| 183 | + |
| 184 | + if($.browser.msie && ($.browser.version < 8 || document.documentMode < 8)) { |
| 185 | + self.type = 'iframeTimer'; |
| 186 | + } else if("onhashchange" in window) { |
| 187 | + self.type = 'hashchangeEvent'; |
| 188 | + } else { |
| 189 | + self.type = 'timer'; |
| 190 | + } |
| 191 | + |
| 192 | + $.extend(self, implementations[self.type]); |
| 193 | + $.history = self; |
| 194 | +})(jQuery); |
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