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Make TaskbarHelper compatible with NativeAOT #161

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Make TaskbarHelper compatible with NativeAOT #161

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45 changes: 34 additions & 11 deletions dev/DevWinUI/Helpers/TaskbarHelper.cs
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Original file line number Diff line number Diff line change
@@ -1,4 +1,6 @@
namespace DevWinUI;
using System.Runtime.InteropServices.Marshalling;

namespace DevWinUI;

public enum TaskbarStates
{
Expand All @@ -8,12 +10,16 @@ public enum TaskbarStates
Error = 0x4,
Paused = 0x8
}

public static partial class TaskbarHelper
{
[ComImport()]
private static readonly Guid CLSID_TaskbarList = new("56fdf344-fd6d-11d0-958a-006097c9a090");
private static readonly Guid IID_ITaskbarList3 = new("ea1afb91-9e28-4b86-90e9-9e9f8a5eefaf");

[Guid("ea1afb91-9e28-4b86-90e9-9e9f8a5eefaf")]
[InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
private interface ITaskbarList3
[GeneratedComInterface]
internal partial interface ITaskbarList3
{
// ITaskbarList
[PreserveSig]
Expand All @@ -33,20 +39,37 @@ private interface ITaskbarList3

// ITaskbarList3
[PreserveSig]
void SetProgressValue(IntPtr hwnd, UInt64 ullCompleted, UInt64 ullTotal);
void SetProgressValue(IntPtr hwnd, ulong ullCompleted, ulong ullTotal);
[PreserveSig]
void SetProgressState(IntPtr hwnd, TaskbarStates state);
}

[ComImport()]
[Guid("56fdf344-fd6d-11d0-958a-006097c9a090")]
[ClassInterface(ClassInterfaceType.None)]
private class TaskbarInstance
private static readonly ITaskbarList3 taskbarInstance;
private static readonly bool taskbarSupported = Environment.OSVersion.Version >= new Version(6, 1);

static TaskbarHelper()
{
}
if (taskbarSupported)
{
unsafe
{
void* ppv;
HRESULT hr = PInvoke.CoCreateInstance(
in CLSID_TaskbarList,
null,
Windows.Win32.System.Com.CLSCTX.CLSCTX_INPROC_SERVER,
in IID_ITaskbarList3,
out ppv);

private static ITaskbarList3 taskbarInstance = (ITaskbarList3)new TaskbarInstance();
private static bool taskbarSupported = Environment.OSVersion.Version >= new Version(6, 1);
if (hr.Succeeded && ppv != null)
{
taskbarInstance = (ITaskbarList3)new StrategyBasedComWrappers().GetOrCreateObjectForComInstance((IntPtr)ppv, CreateObjectFlags.None);
Marshal.Release((IntPtr)ppv);
taskbarInstance.HrInit();
}
}
}
}

/// <summary>
/// Sets the progress state of a specified window in the taskbar if supported.
Expand Down
1 change: 1 addition & 0 deletions dev/DevWinUI/NativeMethods.txt
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Original file line number Diff line number Diff line change
@@ -1,4 +1,5 @@
ClientToScreen
CoCreateInstance
CombineRgn
CoWaitForMultipleObjects
CreateEllipticRgn
Expand Down