Merge pull request #220 from github/feature/status-bar-notifications

Add a status bar notification service

Author: haacked

src/GitHub.Exports/GitHub.Exports.csproj

@@ -116,11 +116,13 @@
     <Compile Include="Services\IMenuHandler.cs" />
     <Compile Include="Services\IMenuProvider.cs" />
     <Compile Include="Services\INotificationDispatcher.cs" />
+    <Compile Include="Services\IStatusBarNotificationService.cs" />
     <Compile Include="Services\ITeamExplorerServices.cs" />
     <Compile Include="Services\ITeamExplorerServiceHolder.cs" />
     <Compile Include="Services\INotificationService.cs" />
     <Compile Include="Services\Logger.cs" />
     <Compile Include="Services\Services.cs" />
+    <Compile Include="Services\StatusBarNotificationService.cs" />
     <Compile Include="Services\TeamExplorerServices.cs" />
     <Compile Include="Services\VSServices.cs" />
     <Compile Include="Models\IConnection.cs" />

src/GitHub.Exports/Services/IStatusBarNotificationService.cs

@@ -0,0 +1,8 @@
+namespace GitHub.Services
+{
+    // for mef purposes
+    [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Design", "CA1040:AvoidEmptyInterfaces")]
+    public interface IStatusBarNotificationService : INotificationService
+    {
+    }
+}

src/GitHub.Exports/Services/StatusBarNotificationService.cs

@@ -0,0 +1,56 @@
+using GitHub.Extensions;
+using Microsoft.VisualStudio;
+using Microsoft.VisualStudio.Shell;
+using Microsoft.VisualStudio.Shell.Interop;
+using System;
+using System.ComponentModel.Composition;
+using System.Windows.Input;
+
+namespace GitHub.Services
+{
+    [Export(typeof(IStatusBarNotificationService))]
+    [PartCreationPolicy(CreationPolicy.Shared)]
+    public class StatusBarNotificationService : IStatusBarNotificationService
+    {
+        readonly IServiceProvider serviceProvider;
+
+        [ImportingConstructor]
+        public StatusBarNotificationService([Import(typeof(SVsServiceProvider))] IServiceProvider serviceProvider)
+        {
+            this.serviceProvider = serviceProvider;
+        }
+
+        public void ShowError(string message)
+        {
+            ShowText(message);
+        }
+
+        public void ShowMessage(string message)
+        {
+            ShowText(message);
+        }
+
+        public void ShowMessage(string message, ICommand command)
+        {
+            ShowText(message);
+        }
+
+        public void ShowWarning(string message)
+        {
+            ShowText(message);
+        }
+
+        void ShowText(string text)
+        {
+            var statusBar = serviceProvider.TryGetService<IVsStatusbar>();
+            int frozen;
+            if (!ErrorHandler.Succeeded(statusBar.IsFrozen(out frozen)))
+                return;
+            // If it's frozen, someone else is grabbing the status bar and we
+            // can't show the message until they release it
+            // so might as well not show it. 
+            if (frozen == 0)
+                ErrorHandler.Succeeded(statusBar.SetText(text));
+        }
+    }
+}