-
Notifications
You must be signed in to change notification settings - Fork 0
/
livecache.js
59 lines (56 loc) · 2.02 KB
/
livecache.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
define(['jquery'], function($) {
/*
livecache
Author: Jim Cowart
License: Dual licensed MIT (http://www.opensource.org/licenses/mit-license) & GPL (http://www.opensource.org/licenses/gpl-license)
Version 0.1.0
*/
var subject = {},
monitoringDom = false,
config = {
monitorDom: false,
invalidateOnly: true
},
// Caveat Emptor: live updates of the cache from DOM mutation WILL get **expensive**
// Seriously - this callback is named bruteForce for a reason, so only use this feature
// if your DOM updates are small and infrequent, and you don't have critical operations
// to apply after and during each update. Some might even go as far as to say that I'm
// Doing It Wrong™ by including this feature. Maybe I'm including it to poke them in the eye. :-)
bruteForce = function(obj) {
var elems = [$(obj.target)].concat($("*", obj.target));
$.each(elems, function(idx, elem){
$.each(subject, function(key) {
if($(elem).is($(key))) {
if(config.invalidateOnly)
delete subject[key];
else
subject[key] = $(key);
}
});
});
};
function applyConfig(cfg) {
config = $.extend(config, cfg);
if(config.monitorDom && ! monitoringDom) {
$(document).on("DOMNodeInserted DOMNodeRemoved", bruteForce);
monitoringDom = true;
}
else if(!config.monitorDom && monitoringDom) {
$(document).off("DOMNodeInserted DOMNodeRemoved", bruteForce);
monitoringDom = false;
}
}
$.extend({
"livecache" : function( selector, forceRefresh ) {
if(typeof selector === "string") {
if(forceRefresh || !subject[selector] || subject[selector].length === 0) {
subject[selector] = $( selector );
}
return subject[selector];
}
else if (typeof selector === "object") {
applyConfig(selector);
}
}
});
});