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
60
61
62
63
64
65
66
67
68
|
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
"use strict";
module.metadata = {
"stability": "experimental"
};
const { Ci } = require("chrome");
const { dispatcher } = require("../util/dispatcher");
const { add, remove, iterator } = require("../lang/weak-set");
var getTargetWindow = dispatcher("getTargetWindow");
getTargetWindow.define(function (target) {
if (target instanceof Ci.nsIDOMWindow)
return target;
if (target instanceof Ci.nsIDOMDocument)
return target.defaultView || null;
return null;
});
exports.getTargetWindow = getTargetWindow;
var attachTo = dispatcher("attachTo");
exports.attachTo = attachTo;
var detachFrom = dispatcher("detatchFrom");
exports.detachFrom = detachFrom;
function attach(modification, target) {
if (!modification)
return;
let window = getTargetWindow(target);
attachTo(modification, window);
// modification are stored per content; `window` reference can still be the
// same even if the content is changed, therefore `document` is used instead.
add(modification, window.document);
}
exports.attach = attach;
function detach(modification, target) {
if (!modification)
return;
if (target) {
let window = getTargetWindow(target);
detachFrom(modification, window);
remove(modification, window.document);
}
else {
let documents = iterator(modification);
for (let document of documents) {
let window = document.defaultView;
// The window might have already gone away
if (!window)
continue;
detachFrom(modification, document.defaultView);
remove(modification, document);
}
}
}
exports.detach = detach;
|
