Stub of "Get Link" feature

Quick stub of the VS file apis required for a potential "Get Link"
feature - gets the current file name and line number to build a github
url of it for sharing.

Author: shana

src/GitHub.Exports/GitHub.Exports.csproj

@@ -111,6 +111,7 @@
     <Compile Include="Helpers\NotificationAwareObject.cs" />
     <Compile Include="Services\Connection.cs" />
     <Compile Include="Services\GitService.cs" />
+    <Compile Include="Services\IActiveDocument.cs" />
     <Compile Include="Services\IGitService.cs" />
     <Compile Include="Services\ITeamExplorerServiceHolder.cs" />
     <Compile Include="Services\Logger.cs" />

src/GitHub.Exports/Services/IActiveDocument.cs

@@ -0,0 +1,8 @@
+namespace GitHub.VisualStudio
+{
+    public interface IActiveDocument
+    {
+        string Name { get; }
+        int Line { get; }
+    }
+}

src/GitHub.VisualStudio/GitHub.VisualStudio.csproj

@@ -222,6 +222,7 @@
     <Compile Include="Helpers\Browser.cs" />
     <Compile Include="Helpers\Colors.cs" />
     <Compile Include="Helpers\Constants.cs" />
+    <Compile Include="Services\ActiveDocument.cs" />
     <Compile Include="Services\ConnectionManager.cs" />
     <Compile Include="Services\Program.cs" />
     <Compile Include="Services\SharedResources.cs" />

src/GitHub.VisualStudio/GitHub.VisualStudio.vsct

@@ -119,6 +119,14 @@
           <ButtonText></ButtonText>
         </Strings>
       </Button>
+
+      <Button guid="guidContextMenuSet" id="getLinkCommand" priority="0x0100" type="Button">
+        <Parent guid="guidContextMenuSet" id="idContextMenuGroup"/>
+        <Strings>
+          <ButtonText>Get Link</ButtonText>
+        </Strings>
+      </Button>
+
     </Buttons>
 
   </Commands>
@@ -178,6 +186,7 @@
 
     <GuidSymbol name="guidContextMenuSet" value="{31057D08-8C3C-4C5B-9F91-8682EA08EC27}">
       <IDSymbol name="idContextMenuGroup" value="0x1010" />
+      <IDSymbol name="getLinkCommand" value="0x100" />
     </GuidSymbol>
 
     <GuidSymbol name="GUID_XAML_EDITOR" value="{4C87B692-1202-46AA-B64C-EF01FAEC53DA}">

src/GitHub.VisualStudio/GitHubPackage.cs

@@ -45,6 +45,8 @@ public GitHubPackage(IServiceProvider serviceProvider)
 
         }
 
+        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Globalization", "CA1300:SpecifyMessageBoxOptions")]
+        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Performance", "CA1804:RemoveUnusedLocals")]
         protected override void Initialize()
         {
 
@@ -58,6 +60,15 @@ protected override void Initialize()
                 var windowFrame = (IVsWindowFrame)window.Frame;
                 ErrorHandler.ThrowOnFailure(windowFrame.Show());
             });
+
+            ServiceProvider.AddTopLevelMenuItem(GuidList.guidContextMenuSet, PkgCmdIDList.getLinkCommand, (s, e) =>
+            {
+                var ap = ServiceProvider.GetExportedValue<IActiveDocument>();
+                var name = ap.Name;
+                var line = ap.Line;
+                System.Windows.Forms.MessageBox.Show(name + " : " + line);
+                
+            });
             base.Initialize();
         }
 

src/GitHub.VisualStudio/PkgCmdID.cs

@@ -11,5 +11,6 @@ static class PkgCmdIDList
         public const int forwardCommand = 0x301;
         public const int refreshCommand = 0x302;
         public const int pullRequestCommand = 0x310;
+        public const int getLinkCommand = 0x100;
     };
 }

src/GitHub.VisualStudio/Services/ActiveDocument.cs

@@ -0,0 +1,37 @@
+using Microsoft.VisualStudio;
+using Microsoft.VisualStudio.Shell;
+using Microsoft.VisualStudio.TextManager.Interop;
+using System;
+using System.ComponentModel.Composition;
+using System.Diagnostics;
+
+namespace GitHub.VisualStudio
+{
+    [Export(typeof(IActiveDocument))]
+    [PartCreationPolicy(CreationPolicy.NonShared)]
+    class ActiveDocument : IActiveDocument
+    {
+        public string Name { get; private set; }
+        public int Line { get; private set; }
+        public int Column { get; private set; }
+
+        [ImportingConstructor]
+        public ActiveDocument([Import(typeof(SVsServiceProvider))] IServiceProvider serviceProvider)
+        {
+            Line = Column = -1;
+            Name = Services.Dte2?.ActiveDocument?.FullName;
+            var textManager = serviceProvider.GetService(typeof(SVsTextManager)) as IVsTextManager;
+            Debug.Assert(textManager != null, "No SVsTextManager service available");
+            if (textManager == null)
+                return;
+            IVsTextView view;
+            int line, col;
+            if (ErrorHandler.Succeeded(textManager.GetActiveView(0, null, out view)) &&
+                ErrorHandler.Succeeded(view.GetCaretPos(out line, out col)))
+            {
+                Line = line;
+                Column = col;
+            }
+        }
+    }
+}