1 files changed, 61 insertions, 0 deletions
diff --git a/tools/addon-sdk-1.7/packages/addon-kit/lib/private-browsing.js b/tools/addon-sdk-1.7/packages/addon-kit/lib/private-browsing.js
new file mode 100644
index 0000000..ff40c98
--- /dev/null
+++ b/tools/addon-sdk-1.7/packages/addon-kit/lib/private-browsing.js
@@ -0,0 +1,61 @@
+/* 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 { emit, on, once, off } = require("api-utils/event/core");
+const { defer } = require("api-utils/functional");
+const { when: unload } = require("api-utils/unload");
+const observers = require("api-utils/observer-service");
+
+// Model holding a state.
+const model = { active: false };
+
+let deferredEmit = defer(emit);
+
+let pbService;
+// Currently, only Firefox implements the private browsing service.
+if (require("api-utils/xul-app").is("Firefox")) {
+  pbService = Cc["@mozilla.org/privatebrowsing;1"].
+              getService(Ci.nsIPrivateBrowsingService);
+
+  // Update model state.
+  model.active = pbService.privateBrowsingEnabled;
+
+  // set up an observer for private browsing switches.
+  observers.add('private-browsing-transition-complete', function onChange() {
+    // Update model state.
+    model.active = pbService.privateBrowsingEnabled;
+    // Emit event with in next turn of event loop.
+    deferredEmit(exports, model.active ? 'start' : 'stop');
+  });
+}
+
+let setMode = defer(function setMode(value) {
+  // We toggle private browsing mode asynchronously in order to work around
+  // bug 659629.  Since private browsing transitions are asynchronous
+  // anyway, this doesn't significantly change the behavior of the API.
+  pbService.privateBrowsingEnabled = !!value
+});
+
+
+// Make sure listeners are cleaned up.
+unload(function() off(exports));
+
+Object.defineProperty(exports, "isActive", { get: function() model.active });
+exports.activate = function activate() pbService && setMode(true)
+exports.deactivate = function deactivate() pbService && setMode(false)
+exports.on = on.bind(null, exports);
+exports.once = once.bind(null, exports);
+exports.removeListener = function removeListener(type, listener) {
+  // Note: We can't just bind `off` as we do it for other methods cause skipping
+  // a listener argument will remove all listeners for the given event type
+  // causing misbehavior. This way we make sure all arguments are passed.
+  off(exports, type, listener);
+};
+
+// This is workaround making sure that exports is wrapped before it's
+// frozen, which needs to happen in order to workaround Bug 673468.
+off(exports, 'workaround-bug-673468');