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https://gitee.com/csharpui/CPF.git
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346 lines
14 KiB
C#
346 lines
14 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Text;
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using CPF.Input;
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using System.IO;
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using System.Linq;
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using System.Runtime.InteropServices;
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using System.Runtime.InteropServices.ComTypes;
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using System.Runtime.Serialization.Formatters.Binary;
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using CPF.Drawing;
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//using IOleDataObject = System.Runtime.InteropServices.ComTypes.IDataObject;
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namespace CPF.Windows
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{
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class OleDataObject : Input.IDataObject
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{
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private IOleDataObject _wrapped;
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public OleDataObject(IOleDataObject wrapped)
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{
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_wrapped = wrapped;
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}
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public bool Contains(DataFormat dataFormat)
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{
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return GetDataFormatsCore().Any(df => df == dataFormat);
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}
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//public IEnumerable<string> GetDataFormats()
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//{
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// return GetDataFormatsCore().Distinct();
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//}
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public object GetData(DataFormat dataFormat)
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{
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return GetDataFromOleHGLOBAL(dataFormat, DVASPECT.DVASPECT_CONTENT);
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}
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private object GetDataFromOleHGLOBAL(DataFormat format, DVASPECT aspect)
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{
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List<short> fs = new List<short>();
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fs.Add((short)ClipboardImpl.GetFormatId(format));
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if (format == DataFormat.Text)
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{
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fs.Add((short)UnmanagedMethods.ClipboardFormat.CF_TEXT);
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fs.Add((short)UnmanagedMethods.ClipboardFormat.CF_OEMTEXT);
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}
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foreach (var item in fs)
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{
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FORMATETC formatEtc = new FORMATETC();
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formatEtc.cfFormat = item;
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formatEtc.dwAspect = aspect;
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formatEtc.lindex = -1;
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formatEtc.tymed = TYMED.TYMED_HGLOBAL;
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if (_wrapped.QueryGetData(ref formatEtc) == 0)
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{
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_wrapped.GetData(ref formatEtc, out STGMEDIUM medium);
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try
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{
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if (medium.unionmember != IntPtr.Zero && medium.tymed == (int)TYMED.TYMED_HGLOBAL)
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{
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if (format == DataFormat.Text)
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return ReadStringFromHGlobal(medium.unionmember);
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if (format == DataFormat.FileNames)
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return ReadFileNamesFromHGlobal(medium.unionmember);
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if (format == DataFormat.Image)
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{
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IntPtr ptr = UnmanagedMethods.GlobalLock(medium.unionmember);
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//默认是24位的图，需要绘制到32位的位图里
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#if Net4
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var bmp = (UnmanagedMethods.BITMAPINFOHEADER)Marshal.PtrToStructure(ptr, typeof(UnmanagedMethods.BITMAPINFOHEADER));
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#else
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var bmp = Marshal.PtrToStructure<UnmanagedMethods.BITMAPINFOHEADER>(ptr);
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#endif
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IntPtr screenDC = UnmanagedMethods.GetDC(IntPtr.Zero);
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IntPtr memDc = UnmanagedMethods.CreateCompatibleDC(screenDC);
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UnmanagedMethods.BITMAPINFOHEADER info = new UnmanagedMethods.BITMAPINFOHEADER();
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info.biSize = (uint)Marshal.SizeOf(typeof(UnmanagedMethods.BITMAPINFOHEADER));
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info.biBitCount = 32;
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info.biHeight = bmp.biHeight;
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info.biWidth = bmp.biWidth;
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info.biPlanes = 1;
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var hBitmap = UnmanagedMethods.CreateDIBSection(memDc, ref info, 0, out IntPtr ppvBits, IntPtr.Zero, 0);
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var oldBits = UnmanagedMethods.SelectObject(memDc, hBitmap);//将位图载入上下文
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_ = UnmanagedMethods.StretchDIBits(memDc, 0, 0, bmp.biWidth, bmp.biHeight, 0, 0, bmp.biWidth, bmp.biHeight, (ptr + 40), ref bmp, 0, (uint)TernaryRasterOperations.SRCCOPY);
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var img = ClipboardImpl.ImageFormHBitmap(hBitmap);
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//var img = new Bitmap(bmp.biWidth, Math.Abs(bmp.biHeight), bmp.biWidth * 4, PixelFormat.PRgba, ppvBits).Clone();
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UnmanagedMethods.SelectObject(memDc, oldBits);
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UnmanagedMethods.ReleaseDC(IntPtr.Zero, screenDC);
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UnmanagedMethods.DeleteDC(memDc);
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UnmanagedMethods.DeleteObject(hBitmap);
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UnmanagedMethods.GlobalUnlock(medium.unionmember);
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return img;
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}
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byte[] data = ReadBytesFromHGlobal(medium.unionmember);
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if (format == DataFormat.Html)
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{
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var html= Encoding.UTF8.GetString(data);
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if (!string.IsNullOrWhiteSpace(html))
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{
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var start = html.IndexOf("<!--StartFragment");
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var end = html.IndexOf("<!--EndFragment");
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html = html.Substring(start + 17, end - start - 17);
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html = html.TrimStart('-', ' ', '>');
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}
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return html;
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}
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if (IsSerializedObject(data))
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{
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using (var ms = new MemoryStream(data))
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{
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ms.Position = DataObject.SerializedObjectGUID.Length;
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BinaryFormatter binaryFormatter = new BinaryFormatter();
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return binaryFormatter.Deserialize(ms);
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}
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}
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return data;
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}
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}
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finally
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{
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UnmanagedMethods.ReleaseStgMedium(ref medium);
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}
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}
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}
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return null;
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}
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private bool IsSerializedObject(byte[] data)
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{
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if (data.Length < DataObject.SerializedObjectGUID.Length)
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return false;
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for (int i = 0; i < DataObject.SerializedObjectGUID.Length; i++)
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if (data[i] != DataObject.SerializedObjectGUID[i])
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return false;
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return true;
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}
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private static IEnumerable<string> ReadFileNamesFromHGlobal(IntPtr hGlobal)
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{
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List<string> files = new List<string>();
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int fileCount = UnmanagedMethods.DragQueryFile(hGlobal, -1, null, 0);
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if (fileCount > 0)
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{
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for (int i = 0; i < fileCount; i++)
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{
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int pathLen = UnmanagedMethods.DragQueryFile(hGlobal, i, null, 0);
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StringBuilder sb = new StringBuilder(pathLen + 1);
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if (UnmanagedMethods.DragQueryFile(hGlobal, i, sb, sb.Capacity) == pathLen)
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{
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files.Add(sb.ToString());
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}
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}
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}
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return files;
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}
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private static string ReadStringFromHGlobal(IntPtr hGlobal)
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{
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IntPtr ptr = UnmanagedMethods.GlobalLock(hGlobal);
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try
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{
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return Marshal.PtrToStringAuto(ptr);
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}
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finally
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{
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UnmanagedMethods.GlobalUnlock(hGlobal);
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}
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}
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private static byte[] ReadBytesFromHGlobal(IntPtr hGlobal)
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{
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IntPtr source = UnmanagedMethods.GlobalLock(hGlobal);
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try
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{
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int size = (int)UnmanagedMethods.GlobalSize(hGlobal).ToInt64();
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byte[] data = new byte[size];
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Marshal.Copy(source, data, 0, size);
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return data;
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}
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finally
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{
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UnmanagedMethods.GlobalUnlock(hGlobal);
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}
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}
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private IEnumerable<DataFormat> GetDataFormatsCore()
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{
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var enumFormat = _wrapped.EnumFormatEtc(DATADIR.DATADIR_GET);
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if (enumFormat != null)
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{
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enumFormat.Reset();
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FORMATETC[] formats = new FORMATETC[1];
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int[] fetched = { 1 };
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while (fetched[0] > 0)
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{
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fetched[0] = 0;
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if (enumFormat.Next(1, formats, fetched) == 0 && fetched[0] > 0)
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{
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if (formats[0].ptd != IntPtr.Zero)
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Marshal.FreeCoTaskMem(formats[0].ptd);
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yield return ClipboardImpl.GetFormat(formats[0].cfFormat);
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}
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}
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}
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}
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}
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[ComImport]
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[Guid("0000010E-0000-0000-C000-000000000046")]
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[InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
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public interface IOleDataObject
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{
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/// <summary>
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/// Called by a data consumer to obtain data from a source data object.
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/// The GetData method renders the data described in the specified FORMATETC
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/// structure and transfers it through the specified STGMEDIUM structure.
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/// The caller then assumes responsibility for releasing the STGMEDIUM structure.
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/// </summary>
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void GetData([In] ref FORMATETC format, out STGMEDIUM medium);
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/// <summary>
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/// Called by a data consumer to obtain data from a source data object.
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/// This method differs from the GetData method in that the caller must
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/// allocate and free the specified storage medium.
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/// </summary>
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void GetDataHere([In] ref FORMATETC format, ref STGMEDIUM medium);
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/// <summary>
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/// Determines whether the data object is capable of rendering the data
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/// described in the FORMATETC structure. Objects attempting a paste or
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/// drop operation can call this method before calling IDataObject::GetData
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/// to get an indication of whether the operation may be successful.
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/// </summary>
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[PreserveSig]
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int QueryGetData([In] ref FORMATETC format);
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/// <summary>
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/// Provides a standard FORMATETC structure that is logically equivalent to one that is more
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/// complex. You use this method to determine whether two different
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/// FORMATETC structures would return the same data, removing the need
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/// for duplicate rendering.
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/// </summary>
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[PreserveSig]
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int GetCanonicalFormatEtc([In] ref FORMATETC formatIn, out FORMATETC formatOut);
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/// <summary>
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/// Called by an object containing a data source to transfer data to
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/// the object that implements this method.
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/// </summary>
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void SetData([In] ref FORMATETC formatIn, [In] ref STGMEDIUM medium, [MarshalAs(UnmanagedType.Bool)] bool release);
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/// <summary>
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/// Creates an object for enumerating the FORMATETC structures for a
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/// data object. These structures are used in calls to IDataObject::GetData
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/// or IDataObject::SetData.
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/// </summary>
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IEnumFORMATETC EnumFormatEtc(DATADIR direction);
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/// <summary>
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/// Called by an object supporting an advise sink to create a connection between
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/// a data object and the advise sink. This enables the advise sink to be
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/// notified of changes in the data of the object.
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/// </summary>
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[PreserveSig]
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int DAdvise([In] ref FORMATETC pFormatetc, ADVF advf, IAdviseSink adviseSink, out int connection);
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/// <summary>
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/// Destroys a notification connection that had been previously set up.
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/// </summary>
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void DUnadvise(int connection);
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/// <summary>
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/// Creates an object that can be used to enumerate the current advisory connections.
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/// </summary>
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[PreserveSig]
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int EnumDAdvise(out IEnumSTATDATA enumAdvise);
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}
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[StructLayout(LayoutKind.Sequential)]
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public struct STGMEDIUM
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{
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[MarshalAs(UnmanagedType.I4)]
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internal int tymed;
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internal IntPtr unionmember;
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internal IntPtr pUnkForRelease;
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}
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[StructLayout(LayoutKind.Sequential)]
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public struct FORMATETC
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{
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[MarshalAs(UnmanagedType.U2)]
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public short cfFormat;
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public IntPtr ptd;
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[MarshalAs(UnmanagedType.U4)]
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public DVASPECT dwAspect;
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public int lindex;
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[MarshalAs(UnmanagedType.U4)]
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public TYMED tymed;
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}
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[ComImport()]
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[Guid("00000103-0000-0000-C000-000000000046")]
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[InterfaceTypeAttribute(ComInterfaceType.InterfaceIsIUnknown)]
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public interface IEnumFORMATETC
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{
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/// <devdoc>
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/// Retrieves the next celt items in the enumeration sequence. If there are
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/// fewer than the requested number of elements left in the sequence, it
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/// retrieves the remaining elements. The number of elements actually
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/// retrieved is returned through pceltFetched (unless the caller passed
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/// in NULL for that parameter).
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/// </devdoc>
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[PreserveSig]
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int Next(int celt, [Out, MarshalAs(UnmanagedType.LPArray, SizeParamIndex = 0)] FORMATETC[] rgelt, [Out, MarshalAs(UnmanagedType.LPArray)] int[] pceltFetched);
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/// <devdoc>
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/// Skips over the next specified number of elements in the enumeration sequence.
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/// </devdoc>
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[PreserveSig]
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int Skip(int celt);
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/// <devdoc>
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/// Resets the enumeration sequence to the beginning.
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/// </devdoc>
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[PreserveSig]
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int Reset();
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/// <devdoc>
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/// Creates another enumerator that contains the same enumeration state as
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/// the current one. Using this function, a client can record a particular
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/// point in the enumeration sequence and then return to that point at a
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/// later time. The new enumerator supports the same interface as the original one.
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/// </devdoc>
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void Clone(out IEnumFORMATETC newEnum);
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}
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}
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