1 files changed, 146 insertions, 0 deletions
diff --git a/devtools/server/actors/settings.js b/devtools/server/actors/settings.js
new file mode 100644
index 000000000..179c82aa5
--- /dev/null
+++ b/devtools/server/actors/settings.js
@@ -0,0 +1,146 @@
+/* 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";
+
+const {Cc, Ci} = require("chrome");
+const protocol = require("devtools/shared/protocol");
+const {DebuggerServer} = require("devtools/server/main");
+const promise = require("promise");
+const Services = require("Services");
+const { settingsSpec } = require("devtools/shared/specs/settings");
+const { FileUtils} = require("resource://gre/modules/FileUtils.jsm");
+const { NetUtil} = require("resource://gre/modules/NetUtil.jsm");
+
+var defaultSettings = {};
+var settingsFile;
+
+exports.register = function (handle) {
+  handle.addGlobalActor(SettingsActor, "settingsActor");
+};
+
+exports.unregister = function (handle) {
+};
+
+function getDefaultSettings() {
+  let chan = NetUtil.newChannel({
+    uri: NetUtil.newURI(settingsFile),
+    loadUsingSystemPrincipal: true});
+  let stream = chan.open2();
+  // Obtain a converter to read from a UTF-8 encoded input stream.
+  let converter = Cc["@mozilla.org/intl/scriptableunicodeconverter"]
+                  .createInstance(Ci.nsIScriptableUnicodeConverter);
+  converter.charset = "UTF-8";
+  let rawstr = converter.ConvertToUnicode(NetUtil.readInputStreamToString(
+                                          stream,
+                                          stream.available()) || "");
+
+  try {
+    defaultSettings = JSON.parse(rawstr);
+  } catch (e) { }
+  stream.close();
+}
+
+function loadSettingsFile() {
+  // Loading resource://app/defaults/settings.json doesn't work because
+  // settings.json is not in the omnijar.
+  // So we look for the app dir instead and go from here...
+  if (settingsFile) {
+    return;
+  }
+  settingsFile = FileUtils.getFile("DefRt", ["settings.json"], false);
+  if (!settingsFile || (settingsFile && !settingsFile.exists())) {
+    // On b2g desktop builds the settings.json file is moved in the
+    // profile directory by the build system.
+    settingsFile = FileUtils.getFile("ProfD", ["settings.json"], false);
+    if (!settingsFile || (settingsFile && !settingsFile.exists())) {
+      console.log("settings.json file does not exist");
+    }
+  }
+
+  if (settingsFile.exists()) {
+    getDefaultSettings();
+  }
+}
+
+var SettingsActor = exports.SettingsActor = protocol.ActorClassWithSpec(settingsSpec, {
+  _getSettingsService: function () {
+    let win = Services.wm.getMostRecentWindow(DebuggerServer.chromeWindowType);
+    return win.navigator.mozSettings;
+  },
+
+  getSetting: function (name) {
+    let deferred = promise.defer();
+    let lock = this._getSettingsService().createLock();
+    let req = lock.get(name);
+    req.onsuccess = function () {
+      deferred.resolve(req.result[name]);
+    };
+    req.onerror = function () {
+      deferred.reject(req.error);
+    };
+    return deferred.promise;
+  },
+
+  setSetting: function (name, value) {
+    let deferred = promise.defer();
+    let data = {};
+    data[name] = value;
+    let lock = this._getSettingsService().createLock();
+    let req = lock.set(data);
+    req.onsuccess = function () {
+      deferred.resolve(true);
+    };
+    req.onerror = function () {
+      deferred.reject(req.error);
+    };
+    return deferred.promise;
+  },
+
+  _hasUserSetting: function (name, value) {
+    if (typeof value === "object") {
+      return JSON.stringify(defaultSettings[name]) !== JSON.stringify(value);
+    }
+    return (defaultSettings[name] !== value);
+  },
+
+  getAllSettings: function () {
+    loadSettingsFile();
+    let settings = {};
+    let self = this;
+
+    let deferred = promise.defer();
+    let lock = this._getSettingsService().createLock();
+    let req = lock.get("*");
+
+    req.onsuccess = function () {
+      for (var name in req.result) {
+        settings[name] = {
+          value: req.result[name],
+          hasUserValue: self._hasUserSetting(name, req.result[name])
+        };
+      }
+      deferred.resolve(settings);
+    };
+    req.onfailure = function () {
+      deferred.reject(req.error);
+    };
+
+    return deferred.promise;
+  },
+
+  clearUserSetting: function (name) {
+    loadSettingsFile();
+    try {
+      this.setSetting(name, defaultSettings[name]);
+    } catch (e) {
+      console.log(e);
+    }
+  }
+});
+
+// For tests
+exports._setDefaultSettings = function (settings) {
+  defaultSettings = settings || {};
+};