add modify detector

Add a detector to check whether the server setting changed.

shadowsocks-csharp/Controller/ShadowsocksController.cs

@@ -42,15 +42,15 @@ namespace Shadowsocks.Controller
             }
 
             openOnLan = _config.openOnLan;
-            polipoRunner = new PolipoRunner();
+            polipoRunner = new PolipoRunner();
             polipoRunner.Start(_config);
-            local = new Local(_config);
+            local = new Local(_config);
             try
             {
                 local.Start();
                 pacServer = new PACServer();
-                pacServer.PACFileChanged += pacServer_PACFileChanged;
-                pacServer.Start(_config);
+                pacServer.PACFileChanged += pacServer_PACFileChanged;
+                pacServer.Start(_config);
             }
             catch (Exception e)
             {
@@ -59,7 +59,7 @@ namespace Shadowsocks.Controller
 
             UpdateSystemProxy();
         }
-
+
         public Server GetCurrentServer()
         {
             return _config.GetCurrentServer();
@@ -71,9 +71,10 @@ namespace Shadowsocks.Controller
             return Configuration.Load();
         }
 
-        public void SaveServers(List<Server> servers)
+        public void SaveServers(List<Server> servers, bool noChange)
         {
             _config.configs = servers;
+            _config.noChange = noChange;
             SaveConfig(_config);
         }
 
@@ -91,6 +92,7 @@ namespace Shadowsocks.Controller
         public void ToggleShareOverLAN(bool enabled)
         {
             _config.shareOverLan = enabled;
+            _config.noChange = false;
             SaveConfig(_config);
             if (ShareOverLANStatusChanged != null)
             {
@@ -142,6 +144,10 @@ namespace Shadowsocks.Controller
             Configuration.Save(newConfig);
             // some logic in configuration updated the config when saving, we need to read it again
             _config = Configuration.Load();
+            if (newConfig.noChange)
+            {
+                return;
+            }
 
             pacServer.Stop();
             local.Stop();

shadowsocks-csharp/View/ConfigForm.cs

@@ -122,6 +122,10 @@ namespace Shadowsocks.View
                         _oldConfiguration = _modifiedConfiguration;
                     }
                 }
+                else
+                {
+                    _modifiedConfiguration.noChange = false;
+                }
                 return true;
             }
             catch (FormatException)
@@ -301,7 +305,7 @@ namespace Shadowsocks.View
                 MessageBox.Show("Please add at least one server");
                 return;
             }
-            controller.SaveServers(_modifiedConfiguration.configs);
+            controller.SaveServers(_modifiedConfiguration.configs, _modifiedConfiguration.noChange);
             this.Hide();
             ShowFirstTimeBalloon();
         }