add modify detector

Don't reload server if config not change.

shadowsocks-csharp/Controller/ShadowsocksController.cs

@@ -64,9 +64,10 @@ 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);
         }
 
@@ -84,6 +85,7 @@ namespace Shadowsocks.Controller
         public void ToggleShareOverLAN(bool enabled)
         {
             _config.shareOverLan = enabled;
+            _config.noChange = false;
             SaveConfig(_config);
             if (ShareOverLANStatusChanged != null)
             {
@@ -133,6 +135,10 @@ namespace Shadowsocks.Controller
         public void SaveConfig(Configuration newConfig)
         {
             Configuration.Save(newConfig);
+            if (newConfig.noChange)
+            {
+                return;
+            }
             // some logic in configuration updated the config when saving, we need to read it again
             _config = Configuration.Load();
 

shadowsocks-csharp/View/ConfigForm.Designer.cs

@@ -418,7 +418,6 @@
             this.ServersListBox.TabIndex = 5;
             this.ServersListBox.SelectedIndexChanged += new System.EventHandler(this.ServersListBox_SelectedIndexChanged);
             // 
-            // 
             // ConfigForm
             // 
             this.AcceptButton = this.OKButton;

shadowsocks-csharp/View/ConfigForm.cs

@@ -301,7 +301,7 @@ namespace Shadowsocks.View
                 MessageBox.Show("Please add at least one server");
                 return;
             }
-            controller.SaveConfig(_modifiedConfiguration);
+            controller.SaveServers(_modifiedConfiguration.configs, _modifiedConfiguration.noChange);
             this.Hide();
             ShowFirstTimeBalloon();
         }