add support for Windows 7 TaskbarItem progress display

ILSpy/MainWindow.xaml

@@ -13,7 +13,7 @@
 	FocusManager.FocusedElement="{Binding ElementName=treeView}"
 	xmlns:d="http://schemas.microsoft.com/expression/blend/2008" d:DesignHeight="500" d:DesignWidth="500"
 	xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="d"
-	>
+>
 	<Window.Resources>
 		<BooleanToVisibilityConverter x:Key="BooleanToVisibilityConverter" />
 	</Window.Resources>
@@ -39,6 +39,9 @@
 			Command="Search"
 			Executed="SearchCommandExecuted" />
 	</Window.CommandBindings>
+	<Window.TaskbarItemInfo>
+		<TaskbarItemInfo />
+	</Window.TaskbarItemInfo>
 	<DockPanel>
 		<!-- Main menu -->
 		<Menu DockPanel.Dock="Top" Name="mainMenu" Height="23">

ILSpy/TextView/DecompilerTextView.cs

@@ -226,6 +226,10 @@ namespace ICSharpCode.ILSpy.TextView
 			if (waitAdorner.Visibility != Visibility.Visible) {
 				waitAdorner.Visibility = Visibility.Visible;
 				waitAdorner.BeginAnimation(OpacityProperty, new DoubleAnimation(0, 1, new Duration(TimeSpan.FromSeconds(0.5)), FillBehavior.Stop));
+				var taskBar = MainWindow.Instance.TaskbarItemInfo;
+				if (taskBar != null) {
+					taskBar.ProgressState = System.Windows.Shell.TaskbarItemProgressState.Indeterminate;
+				}
 			}
 			CancellationTokenSource previousCancellationTokenSource = currentCancellationTokenSource;
 			var myCancellationTokenSource = new CancellationTokenSource();
@@ -248,6 +252,10 @@ namespace ICSharpCode.ILSpy.TextView
 					if (currentCancellationTokenSource == myCancellationTokenSource) {
 						currentCancellationTokenSource = null;
 						waitAdorner.Visibility = Visibility.Collapsed;
+						var taskBar = MainWindow.Instance.TaskbarItemInfo;
+						if (taskBar != null) {
+							taskBar.ProgressState = System.Windows.Shell.TaskbarItemProgressState.None;
+						}
 						if (task.IsCanceled) {
 							AvalonEditTextOutput output = new AvalonEditTextOutput();
 							output.WriteLine("The operation was canceled.");