semantic_search/js/jquery.cache.js

/**
 * a jquery cache function
 * 
 * works by creating a bunch of hidden text areas for later retrieval
 * assumes, at this point, that value is a string which is properly encoded
 * 
 * many solutions are bogged down by having to encode and decode cache values in larger
 * from single large arrays stored in textareas, etc.
 * 
 * Tested only on Windows IE7 and FireFox 1.5.x
 * 
 * @todo do some checks of key and value
 * @todo alternative use cookies/iframes for better XP persistance
 * 
 * @author Jonathan Hendler (jonathan at civicactions dot com)
 * @license AGPL http://www.affero.org/oagpl.html
 * @version 0.1.0
 * 
 *  cacheCheck:
 *  cachePut:
 *  cacheGet:
 *  cacheRemove:
 *  
 */

jQuery.extend({ 
    cacheCheck: function (key){
        return jQuery('#'+key).size() > 0;
    },
    cachePut: function (key,value){
        if (!jQuery.cacheCheck(key)){
            jQuery('body').append('<textarea id="'+key+'" style="position: absolute; top: 0px; left: 0px; display: none; inline: none;"></textarea>');
        }
        //do some checks of key and value
        jQuery('#'+key).val(value);
    },
    cacheGet: function (key){
        if (jQuery.cacheCheck(key)){
            return jQuery('#'+key).val();
        }
        else {
            return null;
        }
    },
    cacheRemove: function (key){
        if (jQuery.cacheCheck(key)){
            jQuery('#'+key).remove();
            return true;
        }
        else {
            return false;
        }
    }
});
1	/**
2	* a jquery cache function
3	*
4	* works by creating a bunch of hidden text areas for later retrieval
5	* assumes, at this point, that value is a string which is properly encoded
6	*
7	* many solutions are bogged down by having to encode and decode cache values in larger
8	* from single large arrays stored in textareas, etc.
9	*
10	* Tested only on Windows IE7 and FireFox 1.5.x
11	*
12	* @todo do some checks of key and value
13	* @todo alternative use cookies/iframes for better XP persistance
14	*
15	* @author Jonathan Hendler (jonathan at civicactions dot com)
16	* @license AGPL http://www.affero.org/oagpl.html
17	* @version 0.1.0
18	*
19	* cacheCheck:
20	* cachePut:
21	* cacheGet:
22	* cacheRemove:
23	*
24	*/
25
26	jQuery.extend({
27	cacheCheck: function (key){
28	return jQuery('#'+key).size() > 0;
29	},
30	cachePut: function (key,value){
31	if (!jQuery.cacheCheck(key)){
32	jQuery('body').append('<textarea id="'+key+'" style="position: absolute; top: 0px; left: 0px; display: none; inline: none;"></textarea>');
33	}
34	//do some checks of key and value
35	jQuery('#'+key).val(value);
36	},
37	cacheGet: function (key){
38	if (jQuery.cacheCheck(key)){
39	return jQuery('#'+key).val();
40	}
41	else {
42	return null;
43	}
44	},
45	cacheRemove: function (key){
46	if (jQuery.cacheCheck(key)){
47	jQuery('#'+key).remove();
48	return true;
49	}
50	else {
51	return false;
52	}
53	}
54	});