1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/dom/permission/PermissionPromptHelper.jsm Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,146 @@
1.4 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.5 + * License, v. 2.0. If a copy of the MPL was not distributed with this file,
1.6 + * You can obtain one at http://mozilla.org/MPL/2.0/. */
1.7 +
1.8 +/* PermissionPromptHelper checks the permissionDB for a given permission
1.9 + * name and performs prompting if needed.
1.10 + * Usage: send PermissionPromptHelper:AskPermission via the FrameMessageManager with:
1.11 + * |origin|, |appID|, |browserFlag| -> used for getting the principal and
1.12 + * |type| and |access| to call testExactPermissionFromPrincipal.
1.13 + * Note that |access| isn't currently used.
1.14 + * Other arugments are:
1.15 + * requestID: ID that gets returned with the result message.
1.16 + *
1.17 + * Once the permission is checked, it returns with the message
1.18 + * "PermissionPromptHelper:AskPermission:OK"
1.19 + * The result contains the |result| e.g.Ci.nsIPermissionManager.ALLOW_ACTION
1.20 + * and a requestID that
1.21 + */
1.22 +
1.23 +"use strict";
1.24 +
1.25 +let DEBUG = 0;
1.26 +let debug;
1.27 +if (DEBUG)
1.28 + debug = function (s) { dump("-*- Permission Prompt Helper component: " + s + "\n"); }
1.29 +else
1.30 + debug = function (s) {}
1.31 +
1.32 +const Cu = Components.utils;
1.33 +const Cc = Components.classes;
1.34 +const Ci = Components.interfaces;
1.35 +
1.36 +this.EXPORTED_SYMBOLS = ["PermissionPromptHelper"];
1.37 +
1.38 +Cu.import("resource://gre/modules/XPCOMUtils.jsm");
1.39 +Cu.import("resource://gre/modules/Services.jsm");
1.40 +
1.41 +XPCOMUtils.defineLazyServiceGetter(this, "ppmm",
1.42 + "@mozilla.org/parentprocessmessagemanager;1",
1.43 + "nsIMessageListenerManager");
1.44 +
1.45 +XPCOMUtils.defineLazyServiceGetter(this, "permissionPromptService",
1.46 + "@mozilla.org/permission-prompt-service;1",
1.47 + "nsIPermissionPromptService");
1.48 +
1.49 +let appsService = Cc["@mozilla.org/AppsService;1"].getService(Ci.nsIAppsService);
1.50 +
1.51 +this.PermissionPromptHelper = {
1.52 + init: function init() {
1.53 + debug("Init");
1.54 + ppmm.addMessageListener("PermissionPromptHelper:AskPermission", this);
1.55 + Services.obs.addObserver(this, "profile-before-change", false);
1.56 + },
1.57 +
1.58 + askPermission: function askPermission(aMessage, aCallbacks) {
1.59 + let msg = aMessage.json;
1.60 +
1.61 + let access = msg.type;
1.62 + if (msg.access) {
1.63 + access = access + "-" + msg.access;
1.64 + }
1.65 +
1.66 + let uri = Services.io.newURI(msg.origin, null, null);
1.67 + let principal =
1.68 + Services.scriptSecurityManager.getAppCodebasePrincipal(uri, msg.appID, msg.browserFlag);
1.69 +
1.70 + let permValue =
1.71 + Services.perms.testExactPermissionFromPrincipal(principal, access);
1.72 +
1.73 + if (permValue == Ci.nsIPermissionManager.DENY_ACTION ||
1.74 + permValue == Ci.nsIPermissionManager.UNKNOWN_ACTION) {
1.75 + aCallbacks.cancel();
1.76 + return;
1.77 + }
1.78 +
1.79 + if (permValue == Ci.nsIPermissionManager.PROMPT_ACTION) {
1.80 +
1.81 + // create the options from permission request.
1.82 + let options = Cc["@mozilla.org/array;1"].createInstance(Ci.nsIMutableArray);
1.83 + if (msg.options) {
1.84 + for (let option of options) {
1.85 + options.appendElement(option);
1.86 + }
1.87 + }
1.88 +
1.89 + // create an array with a nsIContentPermissionType element
1.90 + let type = {
1.91 + type: msg.type,
1.92 + access: msg.access ? msg.access : "unused",
1.93 + options: options,
1.94 + QueryInterface: XPCOMUtils.generateQI([Ci.nsIContentPermissionType])
1.95 + };
1.96 + let typeArray = Cc["@mozilla.org/array;1"].createInstance(Ci.nsIMutableArray);
1.97 + typeArray.appendElement(type, false);
1.98 +
1.99 + // create a nsIContentPermissionRequest
1.100 + let request = {
1.101 + types: typeArray,
1.102 + principal: principal,
1.103 + QueryInterface: XPCOMUtils.generateQI([Ci.nsIContentPermissionRequest]),
1.104 + allow: aCallbacks.allow,
1.105 + cancel: aCallbacks.cancel,
1.106 + window: Services.wm.getOuterWindowWithId(msg.windowID)
1.107 + };
1.108 +
1.109 + permissionPromptService.getPermission(request);
1.110 + return;
1.111 + }
1.112 +
1.113 + if (permValue == Ci.nsIPermissionManager.ALLOW_ACTION) {
1.114 + aCallbacks.allow();
1.115 + return;
1.116 + }
1.117 + },
1.118 +
1.119 + observe: function observe(aSubject, aTopic, aData) {
1.120 + ppmm.removeMessageListener("PermissionPromptHelper:AskPermission", this);
1.121 + Services.obs.removeObserver(this, "profile-before-change");
1.122 + ppmm = null;
1.123 + },
1.124 +
1.125 + receiveMessage: function receiveMessage(aMessage) {
1.126 + debug("PermissionPromptHelper::receiveMessage " + aMessage.name);
1.127 + let mm = aMessage.target;
1.128 + let msg = aMessage.data;
1.129 +
1.130 + let result;
1.131 + if (aMessage.name == "PermissionPromptHelper:AskPermission") {
1.132 + this.askPermission(aMessage, {
1.133 + cancel: function() {
1.134 + mm.sendAsyncMessage("PermissionPromptHelper:AskPermission:OK",
1.135 + { result: Ci.nsIPermissionManager.DENY_ACTION,
1.136 + requestID: msg.requestID });
1.137 + },
1.138 + allow: function(aChoice) {
1.139 + mm.sendAsyncMessage("PermissionPromptHelper:AskPermission:OK",
1.140 + { result: Ci.nsIPermissionManager.ALLOW_ACTION,
1.141 + choice: aChoice,
1.142 + requestID: msg.requestID });
1.143 + }
1.144 + });
1.145 + }
1.146 + }
1.147 +}
1.148 +
1.149 +PermissionPromptHelper.init();
