Make log messages distinguishable from other extensions

log statement in Log.debug is commented out by default. It makes sense
to make this configurable by the user later on.

extension.js

@@ -23,6 +23,7 @@ const Gtk = imports.gi.Gtk;
 const Main = imports.ui.main;
 
 const Me = imports.misc.extensionUtils.getCurrentExtension();
+const Log = Me.imports.log.Log;
 const TorButton = Me.imports.ui.tor_button.TorButton;
 const TorControlClient = Me.imports.tor_control_client.TorControlClient;
 
@@ -42,6 +43,7 @@ function enable() {
     torButton = new TorButton(torControlClient);
     Main.panel.addToStatusArea(torButton.Name, torButton);
     torControlClient.openConnection();
+    Log.debug('Enabled Tor extension');
 }
 
 function disable() {
@@ -50,4 +52,6 @@ function disable() {
 
     if (torButton !== null)
         torButton.destroy();
+
+    Log.debug('Disabled Tor extension');
 }

log.js

@@ -0,0 +1,9 @@
+const Log = {
+  warn: function(message) {
+    log('[tor control] ' + message);
+  },
+
+  debug: function(message) {
+    //log('[tor control] DEBUG: ' + message);
+  }
+}

tor_control_client.js

@@ -24,6 +24,9 @@ const GLib = imports.gi.GLib;
 const Lang = imports.lang;
 const Signals = imports.signals;
 
+const Me = imports.misc.extensionUtils.getCurrentExtension();
+const Log = Me.imports.log.Log;
+
 const TorConnectionError = new Lang.Class({
     Name: 'TorConnectionError',
 
@@ -58,6 +61,7 @@ const TorControlClient = new Lang.Class({
     },
 
     openConnection: function() {
+        Log.debug('Trying to reconnect ...');
         try {
             this._connect(this._host, this._port);
             this._updateProtocolInfo();
@@ -65,10 +69,13 @@ const TorControlClient = new Lang.Class({
             this._authenticate();
             this.emit('changed-connection-state', 'ready');
             this.stopAutoRetry();
+            Log.debug('Connected to Tor control port');
         } catch (e if e instanceof TorConnectionError) {
+            Log.debug('Could not connect to Tor control port');
             this.closeConnection(e.message);
             this.startAutoRetry();
         } catch (e if e instanceof TorProtocolError) {
+            Log.debug('Tor control protocol error: ' + e.message);
             this.closeConnection(e.message);
             this.startAutoRetry();
         }
@@ -92,16 +99,19 @@ const TorControlClient = new Lang.Class({
             return;
 
         this._autoRetryTimerId = GLib.timeout_add(GLib.PRIORITY_DEFAULT, 1000, Lang.bind(this, function() {
-            //log('Retrying to open connection ...');
             this.openConnection();
             return this._connection === null || !this._connection.is_connected();
         }));
+
+        Log.debug('Started auto retry (timer id=' + this._autoRetryTimerId + ')');
     },
 
     stopAutoRetry: function() {
         if (this._autoRetryTimerId === null)
             return;
 
+        Log.debug('Stopping auto retry (timer id=' + this._autoRetryTimerId + ')');
+
         GLib.source_remove(this._autoRetryTimerId);
         this._autoRetryTimerId = null;
     },