gecko-dev/dom/browser-element/BrowserElementChild.js

74 строки
2.1 KiB
JavaScript

/* 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";
ChromeUtils.import("resource://gre/modules/Services.jsm");
function debug(msg) {
//dump("BrowserElementChild - " + msg + "\n");
}
// NB: this must happen before we process any messages from
// mozbrowser API clients.
docShell.isActive = true;
function parentDocShell(docshell) {
if (!docshell) {
return null;
}
let treeitem = docshell.QueryInterface(Ci.nsIDocShellTreeItem);
return treeitem.parent ? treeitem.parent.QueryInterface(Ci.nsIDocShell) : null;
}
function isTopBrowserElement(docShell) {
while (docShell) {
docShell = parentDocShell(docShell);
if (docShell && docShell.isMozBrowser) {
return false;
}
}
return true;
}
var BrowserElementIsReady;
debug(`Might load BE scripts: BEIR: ${BrowserElementIsReady}`);
if (!BrowserElementIsReady) {
debug("Loading BE scripts")
if (!("BrowserElementIsPreloaded" in this)) {
if(Services.appinfo.processType == Services.appinfo.PROCESS_TYPE_CONTENT) {
// general content apps
if (isTopBrowserElement(docShell)) {
Services.scriptloader.loadSubScript("chrome://global/content/BrowserElementCopyPaste.js", this);
}
} else {
// rocketbar in system app and other in-process case (ex. B2G desktop client)
Services.scriptloader.loadSubScript("chrome://global/content/BrowserElementCopyPaste.js", this);
}
Services.scriptloader.loadSubScript("chrome://global/content/BrowserElementChildPreload.js", this);
}
function onDestroy() {
removeMessageListener("browser-element-api:destroy", onDestroy);
if (api) {
api.destroy();
}
if ("CopyPasteAssistent" in this) {
CopyPasteAssistent.destroy();
}
BrowserElementIsReady = false;
}
addMessageListener("browser-element-api:destroy", onDestroy);
BrowserElementIsReady = true;
} else {
debug("BE already loaded, abort");
}
sendAsyncMessage('browser-element-api:call', { 'msg_name': 'hello' });