|
25
|
1 define(["../Deferred", "../log/trace!"], function (Deferred, trace) {
|
|
|
2 function on(node, eventName, handler) {
|
|
|
3 // Add an event listener to a DOM node
|
|
|
4 node.addEventListener(eventName, handler, false);
|
|
|
5
|
|
|
6 return function () {
|
|
|
7 node.removeEventListener(eventName, handler, false);
|
|
|
8 };
|
|
|
9 }
|
|
|
10
|
|
|
11 return {
|
|
|
12 injectionPoint: document.head,
|
|
|
13 injectBefore: document.head.firstChild,
|
|
|
14
|
|
|
15 _map: {},
|
|
|
16
|
|
|
17 _inject: function (name, attr) {
|
|
|
18 var node = document.createElement(name),
|
|
|
19 d = new Deferred(),
|
|
|
20
|
|
|
21 cleanup = function () {
|
|
|
22 noerr();
|
|
|
23 noload();
|
|
|
24 },
|
|
|
25
|
|
|
26 noload = on(node, "load", function () {
|
|
|
27 d.resolve({
|
|
|
28 node: node
|
|
|
29 });
|
|
|
30 cleanup();
|
|
|
31 }, true),
|
|
|
32
|
|
|
33 noerr = on(node, "error", function (e) {
|
|
|
34 d.reject({
|
|
|
35 erorr: e,
|
|
|
36 node: node
|
|
|
37 });
|
|
|
38 cleanup();
|
|
|
39 }, true);
|
|
|
40
|
|
|
41 for (var p in attr)
|
|
|
42 node[p] = attr[p];
|
|
|
43
|
|
|
44 this.injectionPoint.insertBefore(node, this.injectBefore);
|
|
|
45 return d;
|
|
|
46 },
|
|
|
47
|
|
|
48 injectScript: function (url) {
|
|
|
49 var d = this._map[url];
|
|
|
50 if (!d) {
|
|
|
51 trace.log("js {0}", url);
|
|
|
52 d = this._inject("script", {
|
|
|
53 type: "text/javascript",
|
|
|
54 charset: "utf-8",
|
|
|
55 src: url
|
|
|
56 });
|
|
|
57 d.then(function () {
|
|
|
58 trace.log("done {0}", url);
|
|
|
59 }, function (e) {
|
|
|
60 trace.err([url, e]);
|
|
|
61 });
|
|
|
62 this._map[url] = d;
|
|
|
63 }
|
|
|
64 return d;
|
|
|
65 },
|
|
|
66
|
|
|
67 injectStylesheet: function (url) {
|
|
|
68 var d = this._map[url];
|
|
|
69 if (!d) {
|
|
|
70 trace.log("css {0}", url);
|
|
|
71 d = this._inject("link", {
|
|
|
72 type: "text/css",
|
|
|
73 rel: "stylesheet",
|
|
|
74 href: url
|
|
|
75 });
|
|
|
76 d.then(function () {
|
|
|
77 trace.log("done {0}", url);
|
|
|
78 }, function (e) {
|
|
|
79 trace.error([url, e]);
|
|
|
80 });
|
|
|
81 this._map[url] = d;
|
|
|
82 }
|
|
|
83 return d;
|
|
|
84 }
|
|
|
85 };
|
|
|
86 }); |
