[PTRun] Drag and drop files (#22409)

* [PTRun] Support drag&drop to other application for files in result list

* [PTRun] use file/folder thumbnail as drag image

* (fix spellcheck)

* [PTRun] use _mouseDownResultViewModel.Image to generate the drag image

* fix spelling + refactoring

src/modules/launcher/PowerLauncher/Helper/DragDataObject.cs

@@ -0,0 +1,99 @@
+// Copyright (c) Microsoft Corporation
+// The Microsoft Corporation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+namespace PowerLauncher.Helper
+{
+    using System;
+    using System.Drawing;
+    using System.Runtime.InteropServices;
+    using System.Runtime.InteropServices.ComTypes;
+    using DrawingImaging = System.Drawing.Imaging;
+    using MediaImaging = System.Windows.Media.Imaging;
+
+    // based on: https://stackoverflow.com/questions/61041282/showing-image-thumbnail-with-mouse-cursor-while-dragging/61148788#61148788
+    public static class DragDataObject
+    {
+        private static readonly Guid DataObject = new Guid("b8c0bd9f-ed24-455c-83e6-d5390c4fe8c4");
+
+        public static IDataObject FromFile(string filePath)
+        {
+            Marshal.ThrowExceptionForHR(SHCreateItemFromParsingName(filePath, null, typeof(IShellItem).GUID, out IShellItem item));
+            Marshal.ThrowExceptionForHR(item.BindToHandler(null, DataObject, typeof(IDataObject).GUID, out object dataObject));
+            return (IDataObject)dataObject;
+        }
+
+        public static void SetDragImage(this IDataObject dataObject, IntPtr hBitmap, int width, int height)
+        {
+            if (dataObject == null)
+            {
+                throw new ArgumentNullException(nameof(dataObject));
+            }
+
+            IDragSourceHelper dragDropHelper = (IDragSourceHelper)new DragDropHelper();
+            ShDragImage dragImage = new ShDragImage
+            {
+                HBmpDragImage = hBitmap,
+                SizeDragImage = new Size(width, height),
+            };
+            Marshal.ThrowExceptionForHR(dragDropHelper.InitializeFromBitmap(ref dragImage, dataObject));
+        }
+
+        [DllImport("shell32", CharSet = CharSet.Unicode)]
+        private static extern int SHCreateItemFromParsingName(string path, IBindCtx pbc, [MarshalAs(UnmanagedType.LPStruct)] Guid riid, out IShellItem ppv);
+
+        [Guid("43826d1e-e718-42ee-bc55-a1e261c37bfe")]
+        [InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
+        private interface IShellItem
+        {
+            [PreserveSig]
+            int BindToHandler(IBindCtx pbc, [MarshalAs(UnmanagedType.LPStruct)] Guid bhid, [MarshalAs(UnmanagedType.LPStruct)] Guid riid, [MarshalAs(UnmanagedType.IUnknown)] out object ppv);
+
+            // more methods available, but we don't need them
+        }
+
+        [ComImport]
+        [Guid("4657278a-411b-11d2-839a-00c04fd918d0")] // CLSID_DragDropHelper
+        private class DragDropHelper
+        {
+        }
+
+        // https://docs.microsoft.com/en-us/windows/win32/api/shobjidl_core/ns-shobjidl_core-shdragimage
+        [StructLayout(LayoutKind.Sequential)]
+        private struct ShDragImage
+        {
+            public Size SizeDragImage;
+            public Point PtOffset;
+            public IntPtr HBmpDragImage;
+            public int CrColorKey;
+        }
+
+        // https://docs.microsoft.com/en-us/windows/win32/api/shobjidl_core/nn-shobjidl_core-idragsourcehelper
+        [InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
+        [Guid("DE5BF786-477A-11D2-839D-00C04FD918D0")]
+        private interface IDragSourceHelper
+        {
+            [PreserveSig]
+            int InitializeFromBitmap(ref ShDragImage pShDrawImage, IDataObject pDataObject);
+
+            // more methods available, but we don't need them
+        }
+
+        // https://stackoverflow.com/a/2897325
+        public static Bitmap BitmapSourceToBitmap(MediaImaging.BitmapSource source)
+        {
+            if (source == null)
+            {
+                return null;
+            }
+
+            Bitmap bitmap = new Bitmap(source.PixelWidth, source.PixelHeight, DrawingImaging.PixelFormat.Format32bppArgb);
+            DrawingImaging.BitmapData bitmapData = bitmap.LockBits(new Rectangle(Point.Empty, bitmap.Size), DrawingImaging.ImageLockMode.WriteOnly, DrawingImaging.PixelFormat.Format32bppArgb);
+
+            source.CopyPixels(System.Windows.Int32Rect.Empty, bitmapData.Scan0, bitmapData.Height * bitmapData.Stride, bitmapData.Stride);
+            bitmap.UnlockBits(bitmapData);
+
+            return bitmap;
+        }
+    }
+}