semantic_search/js/jquery.history.js

/*
 * jQuery history plugin
 *
 * Copyright (c) 2006 Taku Sano (Mikage Sawatari)
 * Licensed under the MIT License:
 *   http://www.opensource.org/licenses/mit-license.php
 *
 * Modified by Lincoln Cooper to add Safari support and only call the callback once during initialization
 * for msie when no initial hash supplied.
 */


jQuery.extend({
	historyCurrentHash: undefined,
	
	historyCallback: undefined,
	
	historyInit: function(callback){
		jQuery.historyCallback = callback;
		var current_hash = location.hash;
		
		jQuery.historyCurrentHash = current_hash;
		if(jQuery.browser.msie) {
			// To stop the callback firing twice during initilization if no hash present
			if (jQuery.historyCurrentHash == '') {
			jQuery.historyCurrentHash = '#';
		}
		
			// add hidden iframe for IE
			$("body").prepend('<iframe id="jQuery_history" style="display: none;"></iframe>');
			var ihistory = $("#jQuery_history")[0];
			var iframe = ihistory.contentWindow.document;
			iframe.open();
			iframe.close();
			iframe.location.hash = current_hash;
		}
		else if ($.browser.safari) {
			// etablish back/forward stacks
			jQuery.historyBackStack = [];
			jQuery.historyBackStack.length = history.length;
			jQuery.historyForwardStack = [];
			
			jQuery.isFirst = true;
		}
		jQuery.historyCallback(current_hash.replace(/^#/, ''));
		setInterval(jQuery.historyCheck, 100);
	},
	
	historyAddHistory: function(hash) {
		// This makes the looping function do something
		jQuery.historyBackStack.push(hash);
		
		jQuery.historyForwardStack.length = 0; // clear forwardStack (true click occured)
		this.isFirst = true;
	},
	
	historyCheck: function(){
		if(jQuery.browser.msie) {
			// On IE, check for location.hash of iframe
			var ihistory = $("#jQuery_history")[0];
			var iframe = ihistory.contentDocument || ihistory.contentWindow.document;
			var current_hash = iframe.location.hash;
			if(current_hash != jQuery.historyCurrentHash) {
			
				location.hash = current_hash;
				jQuery.historyCurrentHash = current_hash;
				jQuery.historyCallback(current_hash.replace(/^#/, ''));
				
			}
		} else if ($.browser.safari) {
			if (!jQuery.dontCheck) {
				var historyDelta = history.length - jQuery.historyBackStack.length;
				
				if (historyDelta) { // back or forward button has been pushed
					jQuery.isFirst = false;
					if (historyDelta < 0) { // back button has been pushed
						// move items to forward stack
						for (var i = 0; i < Math.abs(historyDelta); i++) jQuery.historyForwardStack.unshift(jQuery.historyBackStack.pop());
					} else { // forward button has been pushed
						// move items to back stack
						for (var i = 0; i < historyDelta; i++) jQuery.historyBackStack.push(jQuery.historyForwardStack.shift());
					}
					var cachedHash = jQuery.historyBackStack[jQuery.historyBackStack.length - 1];
					if (cachedHash != undefined) {
						jQuery.historyCurrentHash = location.hash;
						jQuery.historyCallback(cachedHash);
					}
				} else if (jQuery.historyBackStack[jQuery.historyBackStack.length - 1] == undefined && !jQuery.isFirst) {
					// back button has been pushed to beginning and URL already pointed to hash (e.g. a bookmark)
					// document.URL doesn't change in Safari
					if (document.URL.indexOf('#') >= 0) {
						jQuery.historyCallback(document.URL.split('#')[1]);
					} else {
						var current_hash = location.hash;
						jQuery.historyCallback('');
					}
					jQuery.isFirst = true;
				}
			}
		} else {
			// otherwise, check for location.hash
			var current_hash = location.hash;
			if(current_hash != jQuery.historyCurrentHash) {
				jQuery.historyCurrentHash = current_hash;
				jQuery.historyCallback(current_hash.replace(/^#/, ''));
			}
		}
	},
	historyLoad: function(hash){
		var newhash;
		
		if (jQuery.browser.safari) {
			newhash = hash;
		}
		else {
			newhash = '#' + hash;
			location.hash = newhash;
		}
		jQuery.historyCurrentHash = newhash;
		
		if(jQuery.browser.msie) {
			var ihistory = $("#jQuery_history")[0];
			var iframe = ihistory.contentWindow.document;
			iframe.open();
			iframe.close();
			iframe.location.hash = newhash;
			jQuery.historyCallback(hash);
		}
		else if (jQuery.browser.safari) {
			jQuery.dontCheck = true;
			// Manually keep track of the history values for Safari
			this.historyAddHistory(hash);
			
			// Wait a while before allowing checking so that Safari has time to update the "history" object
			// correctly (otherwise the check loop would detect a false change in hash).
			var fn = function() {jQuery.dontCheck = false;};
			window.setTimeout(fn, 200);
			jQuery.historyCallback(hash);
			// N.B. "location.hash=" must be the last line of code for Safari as execution stops afterwards.
			//      By explicitly using the "location.hash" command (instead of using a variable set to "location.hash") the
			//      URL in the browser and the "history" object are both updated correctly.
			location.hash = newhash;
		}
		else {
		  jQuery.historyCallback(hash);
		}
	}
});
1	/*
2	* jQuery history plugin
3	*
4	* Copyright (c) 2006 Taku Sano (Mikage Sawatari)
5	* Licensed under the MIT License:
6	* http://www.opensource.org/licenses/mit-license.php
7	*
8	* Modified by Lincoln Cooper to add Safari support and only call the callback once during initialization
9	* for msie when no initial hash supplied.
10	*/
11
12
13	jQuery.extend({
14	historyCurrentHash: undefined,
15
16	historyCallback: undefined,
17
18	historyInit: function(callback){
19	jQuery.historyCallback = callback;
20	var current_hash = location.hash;
21
22	jQuery.historyCurrentHash = current_hash;
23	if(jQuery.browser.msie) {
24	// To stop the callback firing twice during initilization if no hash present
25	if (jQuery.historyCurrentHash == '') {
26	jQuery.historyCurrentHash = '#';
27	}
28
29	// add hidden iframe for IE
30	$("body").prepend('<iframe id="jQuery_history" style="display: none;"></iframe>');
31	var ihistory = $("#jQuery_history")[0];
32	var iframe = ihistory.contentWindow.document;
33	iframe.open();
34	iframe.close();
35	iframe.location.hash = current_hash;
36	}
37	else if ($.browser.safari) {
38	// etablish back/forward stacks
39	jQuery.historyBackStack = [];
40	jQuery.historyBackStack.length = history.length;
41	jQuery.historyForwardStack = [];
42
43	jQuery.isFirst = true;
44	}
45	jQuery.historyCallback(current_hash.replace(/^#/, ''));
46	setInterval(jQuery.historyCheck, 100);
47	},
48
49	historyAddHistory: function(hash) {
50	// This makes the looping function do something
51	jQuery.historyBackStack.push(hash);
52
53	jQuery.historyForwardStack.length = 0; // clear forwardStack (true click occured)
54	this.isFirst = true;
55	},
56
57	historyCheck: function(){
58	if(jQuery.browser.msie) {
59	// On IE, check for location.hash of iframe
60	var ihistory = $("#jQuery_history")[0];
61	var iframe = ihistory.contentDocument \|\| ihistory.contentWindow.document;
62	var current_hash = iframe.location.hash;
63	if(current_hash != jQuery.historyCurrentHash) {
64
65	location.hash = current_hash;
66	jQuery.historyCurrentHash = current_hash;
67	jQuery.historyCallback(current_hash.replace(/^#/, ''));
68
69	}
70	} else if ($.browser.safari) {
71	if (!jQuery.dontCheck) {
72	var historyDelta = history.length - jQuery.historyBackStack.length;
73
74	if (historyDelta) { // back or forward button has been pushed
75	jQuery.isFirst = false;
76	if (historyDelta < 0) { // back button has been pushed
77	// move items to forward stack
78	for (var i = 0; i < Math.abs(historyDelta); i++) jQuery.historyForwardStack.unshift(jQuery.historyBackStack.pop());
79	} else { // forward button has been pushed
80	// move items to back stack
81	for (var i = 0; i < historyDelta; i++) jQuery.historyBackStack.push(jQuery.historyForwardStack.shift());
82	}
83	var cachedHash = jQuery.historyBackStack[jQuery.historyBackStack.length - 1];
84	if (cachedHash != undefined) {
85	jQuery.historyCurrentHash = location.hash;
86	jQuery.historyCallback(cachedHash);
87	}
88	} else if (jQuery.historyBackStack[jQuery.historyBackStack.length - 1] == undefined && !jQuery.isFirst) {
89	// back button has been pushed to beginning and URL already pointed to hash (e.g. a bookmark)
90	// document.URL doesn't change in Safari
91	if (document.URL.indexOf('#') >= 0) {
92	jQuery.historyCallback(document.URL.split('#')[1]);
93	} else {
94	var current_hash = location.hash;
95	jQuery.historyCallback('');
96	}
97	jQuery.isFirst = true;
98	}
99	}
100	} else {
101	// otherwise, check for location.hash
102	var current_hash = location.hash;
103	if(current_hash != jQuery.historyCurrentHash) {
104	jQuery.historyCurrentHash = current_hash;
105	jQuery.historyCallback(current_hash.replace(/^#/, ''));
106	}
107	}
108	},
109	historyLoad: function(hash){
110	var newhash;
111
112	if (jQuery.browser.safari) {
113	newhash = hash;
114	}
115	else {
116	newhash = '#' + hash;
117	location.hash = newhash;
118	}
119	jQuery.historyCurrentHash = newhash;
120
121	if(jQuery.browser.msie) {
122	var ihistory = $("#jQuery_history")[0];
123	var iframe = ihistory.contentWindow.document;
124	iframe.open();
125	iframe.close();
126	iframe.location.hash = newhash;
127	jQuery.historyCallback(hash);
128	}
129	else if (jQuery.browser.safari) {
130	jQuery.dontCheck = true;
131	// Manually keep track of the history values for Safari
132	this.historyAddHistory(hash);
133
134	// Wait a while before allowing checking so that Safari has time to update the "history" object
135	// correctly (otherwise the check loop would detect a false change in hash).
136	var fn = function() {jQuery.dontCheck = false;};
137	window.setTimeout(fn, 200);
138	jQuery.historyCallback(hash);
139	// N.B. "location.hash=" must be the last line of code for Safari as execution stops afterwards.
140	// By explicitly using the "location.hash" command (instead of using a variable set to "location.hash") the
141	// URL in the browser and the "history" object are both updated correctly.
142	location.hash = newhash;
143	}
144	else {
145	jQuery.historyCallback(hash);
146	}
147	}
148	});