blob: 72b524299dcc52fe7f07184cee3c4b83569d05ae (
plain)
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
69
70
71
72
73
74
75
76
77
78
79
80
|
/* 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";
var EXPORTED_SYMBOLS = ["LightweightThemeChild"];
const { Services } = ChromeUtils.import("resource://gre/modules/Services.jsm");
/**
* LightweightThemeChild forwards theme data to in-content pages.
* It is both instantiated by the traditional Actor mechanism,
* and also manually within the sidebar JS global (which has no message manager).
* The manual instantiation is necessary due to Bug 1596852.
*/
class LightweightThemeChild extends JSWindowActorChild {
constructor() {
super();
Services.cpmm.sharedData.addEventListener("change", this);
}
didDestroy() {
Services.cpmm.sharedData.removeEventListener("change", this);
}
_getChromeOuterWindowID() {
try {
// Getting the browserChild throws an exception when it is null.
let browserChild = this.docShell.browserChild;
if (browserChild) {
return browserChild.chromeOuterWindowID;
}
} catch (ex) {}
// We don't have a message manager, so presumable we're running in a sidebar
// in the parent process.
return this.contentWindow.top.docShell?.outerWindowID;
}
/**
* Handles "change" events on the child sharedData map, and notifies
* our content page if its theme data was among the changed keys.
*/
handleEvent(event) {
switch (event.type) {
// Make sure to update the theme data on first page show.
case "pageshow":
this.update();
break;
case "change":
if (
event.changedKeys.includes(`theme/${this._getChromeOuterWindowID()}`)
) {
this.update();
}
break;
}
}
/**
* Forward the theme data to the page.
*/
update() {
const event = Cu.cloneInto(
{
detail: {
data: Services.cpmm.sharedData.get(
`theme/${this._getChromeOuterWindowID()}`
),
},
},
this.contentWindow
);
this.contentWindow.dispatchEvent(
new this.contentWindow.CustomEvent("LightweightTheme:Set", event)
);
}
}
|
