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";
this.EXPORTED_SYMBOLS = ["ContentRequestHelper"];
const { interfaces: Ci, utils: Cu } = Components;
Cu.import("resource://gre/modules/XPCOMUtils.jsm");
Cu.import("resource://gre/modules/Promise.jsm");
XPCOMUtils.defineLazyServiceGetter(this, "uuidgen",
"@mozilla.org/uuid-generator;1",
"nsIUUIDGenerator");
XPCOMUtils.defineLazyModuleGetter(this, "SystemAppProxy",
"resource://gre/modules/SystemAppProxy.jsm");
function debug(msg) {
// dump("ContentRequestHelper ** " + msg + "\n");
}
this.ContentRequestHelper = function() {
}
ContentRequestHelper.prototype = {
contentRequest: function(aContentEventName, aChromeEventName,
aInternalEventName, aData) {
let deferred = Promise.defer();
let id = uuidgen.generateUUID().toString();
SystemAppProxy.addEventListener(aContentEventName,
function onContentEvent(result) {
SystemAppProxy.removeEventListener(aContentEventName,
onContentEvent);
let msg = result.detail;
if (!msg || !msg.id || msg.id != id) {
deferred.reject("InternalErrorWrongContentEvent " +
JSON.stringify(msg));
SystemAppProxy.removeEventListener(aContentEventName,
onContentEvent);
return;
}
debug("Got content event " + JSON.stringify(msg));
if (msg.error) {
deferred.reject(msg.error);
} else {
deferred.resolve(msg.result);
}
});
let detail = {
eventName: aInternalEventName,
id: id,
data: aData
};
debug("Send chrome event " + JSON.stringify(detail));
SystemAppProxy._sendCustomEvent(aChromeEventName, detail);
return deferred.promise;
}
};
|
