зеркало из https://github.com/mozilla/gecko-dev.git
128 строки
4.3 KiB
JavaScript
128 строки
4.3 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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/* PermissionPromptHelper checks the permissionDB for a given permission
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* name and performs prompting if needed.
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* Usage: send PermissionPromptHelper:AskPermission via the FrameMessageManager with:
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* |origin|, |appID|, |browserFlag| -> used for getting the principal and
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* |type| and |access| to call testExactPermissionFromPrincipal.
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* Note that |access| isn't currently used.
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* Other arugments are:
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* requestID: ID that gets returned with the result message.
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*
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* Once the permission is checked, it returns with the message
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* "PermissionPromptHelper:AskPermission:OK"
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* The result contains the |result| e.g.Ci.nsIPermissionManager.ALLOW_ACTION
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* and a requestID that
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*/
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"use strict";
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let DEBUG = 0;
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let debug;
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if (DEBUG)
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debug = function (s) { dump("-*- Permission Prompt Helper component: " + s + "\n"); }
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else
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debug = function (s) {}
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const Cu = Components.utils;
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const Cc = Components.classes;
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const Ci = Components.interfaces;
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this.EXPORTED_SYMBOLS = ["PermissionPromptHelper"];
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Cu.import("resource://gre/modules/XPCOMUtils.jsm");
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Cu.import("resource://gre/modules/Services.jsm");
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XPCOMUtils.defineLazyServiceGetter(this, "ppmm",
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"@mozilla.org/parentprocessmessagemanager;1",
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"nsIMessageListenerManager");
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XPCOMUtils.defineLazyServiceGetter(this, "permissionPromptService",
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"@mozilla.org/permission-prompt-service;1",
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"nsIPermissionPromptService");
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let appsService = Cc["@mozilla.org/AppsService;1"].getService(Ci.nsIAppsService);
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this.PermissionPromptHelper = {
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init: function init() {
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debug("Init");
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ppmm.addMessageListener("PermissionPromptHelper:AskPermission", this);
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Services.obs.addObserver(this, "profile-before-change", false);
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},
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askPermission: function askPermission(aMessage, aCallbacks) {
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let msg = aMessage.json;
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let access = msg.type;
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if (msg.access) {
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access = access + "-" + msg.access;
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}
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let uri = Services.io.newURI(msg.origin, null, null);
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let principal =
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Services.scriptSecurityManager.getAppCodebasePrincipal(uri, msg.appID, msg.browserFlag);
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let permValue =
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Services.perms.testExactPermissionFromPrincipal(principal, access);
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if (permValue == Ci.nsIPermissionManager.DENY_ACTION ||
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permValue == Ci.nsIPermissionManager.UNKNOWN_ACTION) {
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aCallbacks.cancel();
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return;
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}
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if (permValue == Ci.nsIPermissionManager.PROMPT_ACTION) {
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// create a nsIContentPermissionRequest
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let request = {
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type: msg.type,
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access: msg.access ? msg.access : "unused",
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principal: principal,
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QueryInterface: XPCOMUtils.generateQI([Ci.nsIContentPermissionRequest]),
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allow: aCallbacks.allow,
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cancel: aCallbacks.cancel,
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window: Services.wm.getOuterWindowWithId(msg.windowID)
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};
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permissionPromptService.getPermission(request);
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return;
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}
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if (permValue == Ci.nsIPermissionManager.ALLOW_ACTION) {
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aCallbacks.allow();
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return;
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}
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},
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observe: function observe(aSubject, aTopic, aData) {
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ppmm.removeMessageListener("PermissionPromptHelper:AskPermission", this);
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Services.obs.removeObserver(this, "profile-before-change");
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ppmm = null;
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},
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receiveMessage: function receiveMessage(aMessage) {
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debug("PermissionPromptHelper::receiveMessage " + aMessage.name);
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let mm = aMessage.target;
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let msg = aMessage.data;
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let result;
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if (aMessage.name == "PermissionPromptHelper:AskPermission") {
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this.askPermission(aMessage, {
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cancel: function() {
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mm.sendAsyncMessage("PermissionPromptHelper:AskPermission:OK",
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{ result: Ci.nsIPermissionManager.DENY_ACTION,
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requestID: msg.requestID });
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},
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allow: function() {
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mm.sendAsyncMessage("PermissionPromptHelper:AskPermission:OK",
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{ result: Ci.nsIPermissionManager.ALLOW_ACTION,
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requestID: msg.requestID });
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}
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});
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}
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}
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}
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PermissionPromptHelper.init();
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