1 files changed, 73 insertions, 0 deletions
diff --git a/tools/addon-sdk-1.5/packages/addon-kit/lib/simple-prefs.js b/tools/addon-sdk-1.5/packages/addon-kit/lib/simple-prefs.js
new file mode 100644
index 0000000..17f8c06
--- /dev/null
+++ b/tools/addon-sdk-1.5/packages/addon-kit/lib/simple-prefs.js
@@ -0,0 +1,73 @@
+/* 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/. */
+
+const { Cc, Ci } = require("chrome");
+const observers = require("observer-service");
+const { EventEmitter } = require("events");
+const unload = require("unload");
+const prefService = require("preferences-service");
+const { jetpackID } = require("@packaging");
+
+const ADDON_BRANCH = "extensions." + jetpackID + ".";
+const BUTTON_PRESSED = jetpackID + "-cmdPressed";
+
+// XXX Currently, only Firefox implements the inline preferences.
+if (!require("xul-app").is("Firefox"))
+  throw Error("This API is only supported in Firefox");
+
+let branch = Cc["@mozilla.org/preferences-service;1"].
+             getService(Ci.nsIPrefService).
+             getBranch(ADDON_BRANCH).
+             QueryInterface(Ci.nsIPrefBranch2);
+
+const events = EventEmitter.compose({
+  constructor: function Prefs() {
+    // Log unhandled errors.
+    this.on("error", console.exception.bind(console));
+
+    // Make sure we remove all the listeners
+    unload.ensure(this);
+
+    this._prefObserver = this._prefObserver.bind(this);
+    this._buttonObserver = this._buttonObserver.bind(this);
+
+    // Listen to changes in the preferences
+    branch.addObserver("", this._prefObserver, false);
+
+    // Listen to clicks on buttons
+    observers.add(BUTTON_PRESSED, this._buttonObserver, this);
+  },
+  _prefObserver: function PrefsPrefObserver(subject, topic, prefName) {
+    if (topic == "nsPref:changed") {
+      this._emit(prefName, prefName);
+    }
+  },
+  _buttonObserver: function PrefsButtonObserver(subject, data) {
+    this._emit(data);
+  },
+  unload: function manager_unload() {
+    this._removeAllListeners();
+    branch.removeObserver("", this._prefObserver);
+ },
+})();
+
+const simple = Proxy.create({
+  get: function(receiver, pref) {
+    return prefService.get(ADDON_BRANCH + pref);
+  },
+  set: function(receiver, pref, val) {
+    prefService.set(ADDON_BRANCH + pref, val);
+  },
+  delete: function(pref) {
+    prefService.reset(ADDON_BRANCH + pref);
+    return true;
+  },
+  has: function(pref) {
+    return prefService.has(ADDON_BRANCH + pref);
+  }
+});
+
+exports.on = events.on;
+exports.removeListener = events.removeListener;
+exports.prefs = simple;