зеркало из https://github.com/mozilla/pjs.git
283 строки
10 KiB
JavaScript
283 строки
10 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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"use strict"
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/* static functions */
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let DEBUG = 0;
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if (DEBUG)
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debug = function (s) { dump("-*- SettingsManager: " + s + "\n"); }
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else
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debug = function (s) {}
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const Cc = Components.classes;
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const Ci = Components.interfaces;
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const Cu = Components.utils;
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Cu.import("resource://gre/modules/SettingsQueue.jsm");
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Cu.import("resource://gre/modules/SettingsDB.jsm");
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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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const nsIClassInfo = Ci.nsIClassInfo;
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const SETTINGSLOCK_CONTRACTID = "@mozilla.org/settingsLock;1";
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const SETTINGSLOCK_CID = Components.ID("{ef95ddd0-6308-11e1-b86c-0800200c9a66}");
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const nsIDOMSettingsLock = Ci.nsIDOMSettingsLock;
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function SettingsLock(aSettingsManager)
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{
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this._open = true;
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this._requests = new Queue();
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this._settingsManager = aSettingsManager;
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this._transaction = null;
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}
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SettingsLock.prototype = {
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process: function process() {
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let lock = this;
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lock._open = false;
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let store = lock._transaction.objectStore(SETTINGSSTORE_NAME);
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while (!lock._requests.isEmpty()) {
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let info = lock._requests.dequeue();
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debug("info:" + info.intent);
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let request = info.request;
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switch (info.intent) {
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case "clear":
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let req = store.clear();
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req.onsuccess = function() { this._open = true;
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Services.DOMRequest.fireSuccess(request, 0);
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this._open = false; }.bind(lock);
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req.onerror = function() { Services.DOMRequest.fireError(request, 0) };
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break;
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case "set":
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for (let key in info.settings) {
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debug("key: " + key + ", val: " + JSON.stringify(info.settings[key]) + ", type: " + typeof(info.settings[key]));
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if(typeof(info.settings[key]) != 'object') {
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req = store.put({settingName: key, settingValue: info.settings[key]});
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} else {
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//Workaround for cloning issues
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let obj = JSON.parse(JSON.stringify(info.settings[key]));
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req = store.put({settingName: key, settingValue: obj});
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}
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req.onsuccess = function() {
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lock._open = true;
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Services.DOMRequest.fireSuccess(request, 0);
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Services.obs.notifyObservers(lock, "mozsettings-changed", JSON.stringify({
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key: key,
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value: info.settings[key]
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}));
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lock._open = false;
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};
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req.onerror = function() { Services.DOMRequest.fireError(request, 0) };
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}
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break;
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case "get":
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if (info.name == "*") {
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req = store.getAll();
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} else {
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req = store.getAll(info.name);
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}
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req.onsuccess = function(event) {
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debug("Request successful. Record count:" + event.target.result.length);
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debug("result: " + JSON.stringify(event.target.result));
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var result = {};
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for (var i in event.target.result)
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result[event.target.result[i].settingName] = event.target.result[i].settingValue;
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this._open = true;
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Services.DOMRequest.fireSuccess(request, result);
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this._open = false;
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}.bind(lock);
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req.onerror = function() { Services.DOMRequest.fireError(request, 0)};
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break;
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}
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}
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if (!lock._requests.isEmpty())
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throw Components.results.NS_ERROR_ABORT;
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lock._open = true;
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},
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createTransactionAndProcess: function() {
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if (this._settingsManager._settingsDB._db) {
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var lock;
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while (lock = this._settingsManager._locks.dequeue()) {
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if (!lock._transaction) {
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lock._transaction = lock._settingsManager._settingsDB._db.transaction(SETTINGSSTORE_NAME, "readwrite");
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}
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lock.process();
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}
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if (!this._requests.isEmpty())
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this.process();
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}
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},
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get: function get(aName) {
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if (!this._open)
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throw Components.results.NS_ERROR_ABORT;
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if (this._settingsManager.hasReadPrivileges || this._settingsManager.hasReadWritePrivileges) {
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let req = Services.DOMRequest.createRequest(this._settingsManager._window);
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this._requests.enqueue({ request: req, intent:"get", name: aName });
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this.createTransactionAndProcess();
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return req;
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} else {
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debug("get not allowed");
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throw Components.results.NS_ERROR_NOT_IMPLEMENTED;
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}
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},
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set: function set(aSettings) {
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if (!this._open)
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throw Components.results.NS_ERROR_ABORT;
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if (this._settingsManager.hasReadWritePrivileges) {
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let req = Services.DOMRequest.createRequest(this._settingsManager._window);
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debug("send: " + JSON.stringify(aSettings));
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this._requests.enqueue({request: req, intent: "set", settings: aSettings});
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this.createTransactionAndProcess();
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return req;
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} else {
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debug("set not allowed");
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throw Components.results.NS_ERROR_NOT_IMPLEMENTED;
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}
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},
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clear: function clear() {
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if (!this._open)
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throw Components.results.NS_ERROR_ABORT;
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if (this._settingsManager.hasReadWritePrivileges) {
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let req = Services.DOMRequest.createRequest(this._settingsManager._window);
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this._requests.enqueue({ request: req, intent: "clear"});
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this.createTransactionAndProcess();
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return req;
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} else {
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debug("clear not allowed");
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throw Components.results.NS_ERROR_NOT_IMPLEMENTED;
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}
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},
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classID : SETTINGSLOCK_CID,
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QueryInterface : XPCOMUtils.generateQI([nsIDOMSettingsLock]),
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classInfo : XPCOMUtils.generateCI({classID: SETTINGSLOCK_CID,
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contractID: SETTINGSLOCK_CONTRACTID,
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classDescription: "SettingsLock",
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interfaces: [nsIDOMSettingsLock],
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flags: nsIClassInfo.DOM_OBJECT})
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};
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const SETTINGSMANAGER_CONTRACTID = "@mozilla.org/settingsManager;1";
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const SETTINGSMANAGER_CID = Components.ID("{5609d0a0-52a9-11e1-b86c-0800200c9a66}");
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const nsIDOMSettingsManager = Ci.nsIDOMSettingsManager;
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let myGlobal = this;
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function SettingsManager()
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{
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this._locks = new Queue();
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var idbManager = Components.classes["@mozilla.org/dom/indexeddb/manager;1"].getService(Ci.nsIIndexedDatabaseManager);
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idbManager.initWindowless(myGlobal);
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this._settingsDB = new SettingsDB();
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this._settingsDB.init(myGlobal);
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}
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SettingsManager.prototype = {
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_onsettingchange: null,
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nextTick: function nextTick(aCallback, thisObj) {
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if (thisObj)
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aCallback = aCallback.bind(thisObj);
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Services.tm.currentThread.dispatch(aCallback, Ci.nsIThread.DISPATCH_NORMAL);
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},
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set onsettingchange(aCallback) {
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if (this.hasReadPrivileges || this.hasReadWritePrivileges)
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this._onsettingchange = aCallback;
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else
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throw Components.results.NS_ERROR_NOT_IMPLEMENTED;
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},
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get onsettingchange() {
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return this._onsettingchange;
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},
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getLock: function() {
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debug("get lock!");
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var lock = new SettingsLock(this);
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this._locks.enqueue(lock);
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this._settingsDB.ensureDB(
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function() { lock.createTransactionAndProcess(); },
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function() { dump("ensureDB error cb!\n"); },
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myGlobal );
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this.nextTick(function() { this._open = false; }, lock);
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return lock;
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},
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init: function(aWindow) {
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// Set navigator.mozSettings to null.
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if (!Services.prefs.getBoolPref("dom.mozSettings.enabled"))
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return null;
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this._window = aWindow;
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Services.obs.addObserver(this, "inner-window-destroyed", false);
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Services.obs.addObserver(this, "mozsettings-changed", false);
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let util = aWindow.QueryInterface(Ci.nsIInterfaceRequestor).getInterface(Ci.nsIDOMWindowUtils);
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this.innerWindowID = util.currentInnerWindowID;
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let principal = aWindow.document.nodePrincipal;
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let secMan = Cc["@mozilla.org/scriptsecuritymanager;1"].getService(Ci.nsIScriptSecurityManager);
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let readPerm = principal == secMan.getSystemPrincipal() ? Ci.nsIPermissionManager.ALLOW_ACTION : Services.perms.testExactPermission(principal.URI, "websettings-read");
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let readwritePerm = principal == secMan.getSystemPrincipal() ? Ci.nsIPermissionManager.ALLOW_ACTION : Services.perms.testExactPermission(principal.URI, "websettings-readwrite");
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this.hasReadPrivileges = readPerm == Ci.nsIPermissionManager.ALLOW_ACTION;
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this.hasReadWritePrivileges = readwritePerm == Ci.nsIPermissionManager.ALLOW_ACTION;
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debug("has read privileges :" + this.hasReadPrivileges + ", has read-write privileges: " + this.hasReadWritePrivileges);
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},
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observe: function(aSubject, aTopic, aData) {
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debug("Topic: " + aTopic);
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if (aTopic == "inner-window-destroyed") {
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let wId = aSubject.QueryInterface(Ci.nsISupportsPRUint64).data;
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if (wId == this.innerWindowID) {
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Services.obs.removeObserver(this, "inner-window-destroyed");
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Services.obs.removeObserver(this, "mozsettings-changed");
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this._requests = null;
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this._window = null;
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this._innerWindowID = null;
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this._onsettingchange = null;
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this._settingsDB.close();
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}
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} else if (aTopic == "mozsettings-changed") {
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if (!this._onsettingchange)
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return;
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let data = JSON.parse(aData);
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debug('data:' + data.key + ':' + data.value + '\n');
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let event = new this._window.MozSettingsEvent("settingchanged", {
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settingName: data.key,
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settingValue: data.value
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});
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this._onsettingchange.handleEvent(event);
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}
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},
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classID : SETTINGSMANAGER_CID,
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QueryInterface : XPCOMUtils.generateQI([nsIDOMSettingsManager, Ci.nsIDOMGlobalPropertyInitializer]),
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classInfo : XPCOMUtils.generateCI({classID: SETTINGSMANAGER_CID,
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contractID: SETTINGSMANAGER_CONTRACTID,
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classDescription: "SettingsManager",
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interfaces: [nsIDOMSettingsManager],
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flags: nsIClassInfo.DOM_OBJECT})
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}
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const NSGetFactory = XPCOMUtils.generateNSGetFactory([SettingsManager, SettingsLock])
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