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git://source.winehq.org/git/wine.git
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605ecafa67
Wine would append a correctly aligned NUL Unicode character to terminate the string but overflow the buffer by one byte for odd-sized strings. Windows instead overwrites the last two buffer bytes with a NUL Unicode character which ends up being misaligned for odd-sized strings. The clipboard data has a size field anyway so match the Windows behavior. Tweak the tests to show that SetClipboardData() can overwrite half of the Unicode string's last character.
631 lines
19 KiB
C
631 lines
19 KiB
C
/*
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* WIN32 clipboard implementation
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*
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* Copyright 1994 Martin Ayotte
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* Copyright 1996 Alex Korobka
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* Copyright 1999 Noel Borthwick
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* Copyright 2003 Ulrich Czekalla for CodeWeavers
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* Copyright 2016 Alexandre Julliard
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*
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*/
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#include <assert.h>
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#include "user_private.h"
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#include "winnls.h"
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#include "wine/server.h"
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#include "wine/debug.h"
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WINE_DEFAULT_DEBUG_CHANNEL(clipboard);
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static CRITICAL_SECTION clipboard_cs;
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static CRITICAL_SECTION_DEBUG critsect_debug =
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{
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0, 0, &clipboard_cs,
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{ &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
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0, 0, { (DWORD_PTR)(__FILE__ ": clipboard_cs") }
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};
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static CRITICAL_SECTION clipboard_cs = { &critsect_debug, -1, 0, 0, 0, 0 };
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/* platform-independent version of METAFILEPICT */
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struct metafile_pict
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{
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LONG mm;
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LONG xExt;
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LONG yExt;
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BYTE bits[1];
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};
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/* get a debug string for a format id */
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static const char *debugstr_format( UINT id )
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{
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WCHAR buffer[256];
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DWORD le = GetLastError();
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BOOL r = NtUserGetClipboardFormatName( id, buffer, 256 );
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SetLastError(le);
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if (r)
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return wine_dbg_sprintf( "%04x %s", id, debugstr_w(buffer) );
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switch (id)
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{
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#define BUILTIN(id) case id: return #id;
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BUILTIN(CF_TEXT)
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BUILTIN(CF_BITMAP)
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BUILTIN(CF_METAFILEPICT)
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BUILTIN(CF_SYLK)
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BUILTIN(CF_DIF)
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BUILTIN(CF_TIFF)
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BUILTIN(CF_OEMTEXT)
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BUILTIN(CF_DIB)
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BUILTIN(CF_PALETTE)
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BUILTIN(CF_PENDATA)
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BUILTIN(CF_RIFF)
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BUILTIN(CF_WAVE)
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BUILTIN(CF_UNICODETEXT)
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BUILTIN(CF_ENHMETAFILE)
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BUILTIN(CF_HDROP)
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BUILTIN(CF_LOCALE)
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BUILTIN(CF_DIBV5)
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BUILTIN(CF_OWNERDISPLAY)
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BUILTIN(CF_DSPTEXT)
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BUILTIN(CF_DSPBITMAP)
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BUILTIN(CF_DSPMETAFILEPICT)
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BUILTIN(CF_DSPENHMETAFILE)
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#undef BUILTIN
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default: return wine_dbg_sprintf( "%04x", id );
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}
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}
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/* build the data to send to the server in SetClipboardData */
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static HANDLE marshal_data( UINT format, HANDLE handle, size_t *ret_size )
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{
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SIZE_T size;
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switch (format)
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{
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case CF_BITMAP:
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case CF_DSPBITMAP:
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{
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BITMAP bitmap, *bm;
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if (!GetObjectW( handle, sizeof(bitmap), &bitmap )) return 0;
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size = abs( bitmap.bmHeight ) * ((((bitmap.bmWidth * bitmap.bmBitsPixel) + 15) >> 3) & ~1);
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*ret_size = sizeof(bitmap) + size;
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if (!(bm = GlobalAlloc( GMEM_FIXED, *ret_size ))) return 0;
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*bm = bitmap;
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GetBitmapBits( handle, size, bm + 1 );
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return bm;
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}
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case CF_PALETTE:
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{
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LOGPALETTE *pal;
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if (!(size = GetPaletteEntries( handle, 0, 0, NULL ))) return 0;
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*ret_size = offsetof( LOGPALETTE, palPalEntry[size] );
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if (!(pal = GlobalAlloc( GMEM_FIXED, *ret_size ))) return 0;
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pal->palVersion = 0x300;
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pal->palNumEntries = size;
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GetPaletteEntries( handle, 0, size, pal->palPalEntry );
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return pal;
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}
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case CF_ENHMETAFILE:
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case CF_DSPENHMETAFILE:
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{
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BYTE *ret;
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if (!(size = GetEnhMetaFileBits( handle, 0, NULL ))) return 0;
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if (!(ret = GlobalAlloc( GMEM_FIXED, size ))) return 0;
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GetEnhMetaFileBits( handle, size, ret );
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*ret_size = size;
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return ret;
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}
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case CF_METAFILEPICT:
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case CF_DSPMETAFILEPICT:
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{
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METAFILEPICT *mf;
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struct metafile_pict *mfbits;
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if (!(mf = GlobalLock( handle ))) return 0;
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if (!(size = GetMetaFileBitsEx( mf->hMF, 0, NULL )))
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{
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GlobalUnlock( handle );
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return 0;
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}
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*ret_size = offsetof( struct metafile_pict, bits[size] );
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if (!(mfbits = GlobalAlloc( GMEM_FIXED, *ret_size )))
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{
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GlobalUnlock( handle );
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return 0;
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}
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mfbits->mm = mf->mm;
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mfbits->xExt = mf->xExt;
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mfbits->yExt = mf->yExt;
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GetMetaFileBitsEx( mf->hMF, size, mfbits->bits );
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GlobalUnlock( handle );
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return mfbits;
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}
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case CF_UNICODETEXT:
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{
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char *ptr;
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if (!(size = GlobalSize( handle ))) return 0;
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if ((data_size_t)size != size) return 0;
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if (size < sizeof(WCHAR)) return 0;
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if (!(ptr = GlobalLock( handle ))) return 0;
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/* enforce nul-termination the Windows way: ignoring alignment */
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*((WCHAR *)(ptr + size) - 1) = 0;
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GlobalUnlock( handle );
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*ret_size = size;
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return handle;
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}
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case CF_TEXT:
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case CF_OEMTEXT:
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{
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char *ptr;
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if (!(size = GlobalSize( handle ))) return 0;
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if ((data_size_t)size != size) return 0;
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if (!(ptr = GlobalLock( handle ))) return 0;
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ptr[size - 1] = 0; /* enforce null-termination */
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GlobalUnlock( handle );
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*ret_size = size;
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return handle;
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}
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default:
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if (!(size = GlobalSize( handle ))) return 0;
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if ((data_size_t)size != size) return 0;
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*ret_size = size;
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return handle;
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}
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}
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/* rebuild the target handle from the data received in GetClipboardData */
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static HANDLE unmarshal_data( UINT format, void *data, data_size_t size )
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{
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HANDLE handle = GlobalReAlloc( data, size, GMEM_MOVEABLE ); /* release unused space */
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switch (format)
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{
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case CF_BITMAP:
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{
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BITMAP *bm = handle;
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if (size < sizeof(*bm)) break;
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if (size < bm->bmWidthBytes * abs( bm->bmHeight )) break;
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if (bm->bmBits) break; /* DIB sections are not supported across processes */
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bm->bmBits = bm + 1;
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return CreateBitmapIndirect( bm );
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}
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case CF_DSPBITMAP: /* not supported across processes */
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break;
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case CF_PALETTE:
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{
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LOGPALETTE *pal = handle;
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if (size < sizeof(*pal)) break;
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if (size < offsetof( LOGPALETTE, palPalEntry[pal->palNumEntries] )) break;
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return CreatePalette( pal );
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}
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case CF_ENHMETAFILE:
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case CF_DSPENHMETAFILE:
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return SetEnhMetaFileBits( size, handle );
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case CF_METAFILEPICT:
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case CF_DSPMETAFILEPICT:
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{
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METAFILEPICT mf;
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struct metafile_pict *mfbits = handle;
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if (size <= sizeof(*mfbits)) break;
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mf.mm = mfbits->mm;
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mf.xExt = mfbits->xExt;
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mf.yExt = mfbits->yExt;
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mf.hMF = SetMetaFileBitsEx( size - offsetof( struct metafile_pict, bits ), mfbits->bits );
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*(METAFILEPICT *)handle = mf;
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return handle;
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}
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}
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return handle;
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}
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/* free a single cached format */
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void free_cached_data( UINT format, HANDLE handle )
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{
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void *ptr;
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switch (format)
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{
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case CF_BITMAP:
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case CF_DSPBITMAP:
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case CF_PALETTE:
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DeleteObject( handle );
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break;
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case CF_ENHMETAFILE:
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case CF_DSPENHMETAFILE:
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DeleteEnhMetaFile( handle );
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break;
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case CF_METAFILEPICT:
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case CF_DSPMETAFILEPICT:
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if ((ptr = GlobalLock( handle )))
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{
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DeleteMetaFile( ((METAFILEPICT *)ptr)->hMF );
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GlobalUnlock( handle );
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}
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GlobalFree( handle );
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break;
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default:
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GlobalFree( handle );
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break;
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}
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}
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/* get the clipboard locale stored in the CF_LOCALE format */
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static LCID get_clipboard_locale(void)
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{
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HANDLE data;
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LCID lcid = GetUserDefaultLCID();
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if ((data = GetClipboardData( CF_LOCALE )))
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{
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LCID *ptr = GlobalLock( data );
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if (ptr)
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{
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if (GlobalSize( data ) >= sizeof(*ptr)) lcid = *ptr;
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GlobalUnlock( data );
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}
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}
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return lcid;
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}
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/* get the codepage to use for text conversions in the specified format (CF_TEXT or CF_OEMTEXT) */
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static UINT get_format_codepage( LCID lcid, UINT format )
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{
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LCTYPE type = (format == CF_TEXT) ? LOCALE_IDEFAULTANSICODEPAGE : LOCALE_IDEFAULTCODEPAGE;
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UINT ret;
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if (!GetLocaleInfoW( lcid, type | LOCALE_RETURN_NUMBER, (LPWSTR)&ret, sizeof(ret)/sizeof(WCHAR) ))
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ret = (format == CF_TEXT) ? CP_ACP : CP_OEMCP;
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return ret;
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}
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/* render synthesized ANSI text based on the contents of the 'from' format */
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static HANDLE render_synthesized_textA( HANDLE data, UINT format, UINT from )
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{
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void *src;
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WCHAR *srcW = NULL;
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HANDLE ret = 0;
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LCID lcid = get_clipboard_locale();
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UINT codepage = get_format_codepage( lcid, format );
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UINT len, size = GlobalSize( data );
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if (!(src = GlobalLock( data ))) return 0;
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if (from != CF_UNICODETEXT) /* first convert incoming format to Unicode */
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{
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UINT from_codepage = get_format_codepage( lcid, from );
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len = MultiByteToWideChar( from_codepage, 0, src, size, NULL, 0 );
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if (!(srcW = HeapAlloc( GetProcessHeap(), 0, len * sizeof(WCHAR) ))) goto done;
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MultiByteToWideChar( from_codepage, 0, src, size, srcW, len );
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src = srcW;
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size = len * sizeof(WCHAR);
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}
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if ((len = WideCharToMultiByte( codepage, 0, src, size / sizeof(WCHAR), NULL, 0, NULL, NULL )))
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{
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if ((ret = GlobalAlloc( GMEM_FIXED, len )))
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WideCharToMultiByte( codepage, 0, src, size / sizeof(WCHAR), ret, len, NULL, NULL );
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}
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done:
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HeapFree( GetProcessHeap(), 0, srcW );
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GlobalUnlock( data );
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return ret;
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}
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/* render synthesized Unicode text based on the contents of the 'from' format */
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static HANDLE render_synthesized_textW( HANDLE data, UINT from )
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{
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char *src;
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HANDLE ret = 0;
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UINT len, size = GlobalSize( data );
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UINT codepage = get_format_codepage( get_clipboard_locale(), from );
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if (!(src = GlobalLock( data ))) return 0;
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if ((len = MultiByteToWideChar( codepage, 0, src, size, NULL, 0 )))
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{
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if ((ret = GlobalAlloc( GMEM_FIXED, len * sizeof(WCHAR) )))
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MultiByteToWideChar( codepage, 0, src, size, ret, len );
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}
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GlobalUnlock( data );
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return ret;
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}
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/* render a synthesized bitmap based on the DIB clipboard data */
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static HANDLE render_synthesized_bitmap( HANDLE data, UINT from )
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{
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BITMAPINFO *bmi;
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HANDLE ret = 0;
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HDC hdc = NtUserGetDC( 0 );
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if ((bmi = GlobalLock( data )))
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{
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/* FIXME: validate data size */
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ret = CreateDIBitmap( hdc, &bmi->bmiHeader, CBM_INIT,
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(char *)bmi + bitmap_info_size( bmi, DIB_RGB_COLORS ),
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bmi, DIB_RGB_COLORS );
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GlobalUnlock( data );
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}
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NtUserReleaseDC( 0, hdc );
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return ret;
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}
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/* render a synthesized DIB based on the clipboard data */
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static HANDLE render_synthesized_dib( HANDLE data, UINT format, UINT from )
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{
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BITMAPINFO *bmi, *src;
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DWORD src_size, header_size, bits_size;
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HANDLE ret = 0;
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HDC hdc = NtUserGetDC( 0 );
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if (from == CF_BITMAP)
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{
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BITMAPV5HEADER header;
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memset( &header, 0, sizeof(header) );
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header.bV5Size = (format == CF_DIBV5) ? sizeof(BITMAPV5HEADER) : sizeof(BITMAPINFOHEADER);
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if (!GetDIBits( hdc, data, 0, 0, NULL, (BITMAPINFO *)&header, DIB_RGB_COLORS )) goto done;
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header_size = bitmap_info_size( (BITMAPINFO *)&header, DIB_RGB_COLORS );
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if (!(ret = GlobalAlloc( GMEM_FIXED, header_size + header.bV5SizeImage ))) goto done;
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bmi = (BITMAPINFO *)ret;
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memset( bmi, 0, header_size );
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memcpy( bmi, &header, header.bV5Size );
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GetDIBits( hdc, data, 0, abs(header.bV5Height), (char *)bmi + header_size, bmi, DIB_RGB_COLORS );
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}
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else
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{
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SIZE_T size = GlobalSize( data );
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if (size < sizeof(*bmi)) goto done;
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if (!(src = GlobalLock( data ))) goto done;
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src_size = bitmap_info_size( src, DIB_RGB_COLORS );
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if (size <= src_size)
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{
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GlobalUnlock( data );
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goto done;
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}
|
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bits_size = size - src_size;
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header_size = (format == CF_DIBV5) ? sizeof(BITMAPV5HEADER) :
|
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offsetof( BITMAPINFO, bmiColors[src->bmiHeader.biCompression == BI_BITFIELDS ? 3 : 0] );
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if ((ret = GlobalAlloc( GMEM_FIXED, header_size + bits_size )))
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{
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bmi = (BITMAPINFO *)ret;
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memset( bmi, 0, header_size );
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memcpy( bmi, src, min( header_size, src_size ));
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bmi->bmiHeader.biSize = header_size;
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/* FIXME: convert colors according to DIBv5 color profile */
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memcpy( (char *)bmi + header_size, (char *)src + src_size, bits_size );
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}
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GlobalUnlock( data );
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}
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done:
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NtUserReleaseDC( 0, hdc );
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return ret;
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}
|
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|
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/* render a synthesized metafile based on the enhmetafile clipboard data */
|
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static HANDLE render_synthesized_metafile( HANDLE data )
|
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{
|
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HANDLE ret = 0;
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UINT size;
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void *bits;
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METAFILEPICT *pict;
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ENHMETAHEADER header;
|
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HDC hdc = NtUserGetDC( 0 );
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|
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size = GetWinMetaFileBits( data, 0, NULL, MM_ISOTROPIC, hdc );
|
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if ((bits = HeapAlloc( GetProcessHeap(), 0, size )))
|
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{
|
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if (GetEnhMetaFileHeader( data, sizeof(header), &header ) &&
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GetWinMetaFileBits( data, size, bits, MM_ISOTROPIC, hdc ))
|
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{
|
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if ((ret = GlobalAlloc( GMEM_FIXED, sizeof(*pict) )))
|
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{
|
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pict = (METAFILEPICT *)ret;
|
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pict->mm = MM_ISOTROPIC;
|
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pict->xExt = header.rclFrame.right - header.rclFrame.left;
|
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pict->yExt = header.rclFrame.bottom - header.rclFrame.top;
|
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pict->hMF = SetMetaFileBitsEx( size, bits );
|
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}
|
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}
|
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HeapFree( GetProcessHeap(), 0, bits );
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}
|
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NtUserReleaseDC( 0, hdc );
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return ret;
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}
|
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|
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/* render a synthesized enhmetafile based on the metafile clipboard data */
|
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static HANDLE render_synthesized_enhmetafile( HANDLE data )
|
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{
|
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METAFILEPICT *pict;
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HANDLE ret = 0;
|
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UINT size;
|
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void *bits;
|
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|
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if (!(pict = GlobalLock( data ))) return 0;
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|
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size = GetMetaFileBitsEx( pict->hMF, 0, NULL );
|
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if ((bits = HeapAlloc( GetProcessHeap(), 0, size )))
|
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{
|
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GetMetaFileBitsEx( pict->hMF, size, bits );
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ret = SetWinMetaFileBits( size, bits, NULL, pict );
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HeapFree( GetProcessHeap(), 0, bits );
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}
|
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|
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GlobalUnlock( data );
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return ret;
|
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}
|
|
|
|
/* render a synthesized format */
|
|
HANDLE render_synthesized_format( UINT format, UINT from )
|
|
{
|
|
HANDLE data = GetClipboardData( from );
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|
|
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if (!data) return 0;
|
|
TRACE( "rendering %s from %s\n", debugstr_format( format ), debugstr_format( from ));
|
|
|
|
switch (format)
|
|
{
|
|
case CF_TEXT:
|
|
case CF_OEMTEXT:
|
|
data = render_synthesized_textA( data, format, from );
|
|
break;
|
|
case CF_UNICODETEXT:
|
|
data = render_synthesized_textW( data, from );
|
|
break;
|
|
case CF_BITMAP:
|
|
data = render_synthesized_bitmap( data, from );
|
|
break;
|
|
case CF_DIB:
|
|
case CF_DIBV5:
|
|
data = render_synthesized_dib( data, format, from );
|
|
break;
|
|
case CF_METAFILEPICT:
|
|
data = render_synthesized_metafile( data );
|
|
break;
|
|
case CF_ENHMETAFILE:
|
|
data = render_synthesized_enhmetafile( data );
|
|
break;
|
|
default:
|
|
assert( 0 );
|
|
}
|
|
if (data)
|
|
{
|
|
TRACE( "adding %s %p\n", debugstr_format( format ), data );
|
|
SetClipboardData( format, data );
|
|
}
|
|
return data;
|
|
}
|
|
|
|
|
|
/**************************************************************************
|
|
* RegisterClipboardFormatW (USER32.@)
|
|
*/
|
|
UINT WINAPI RegisterClipboardFormatW( LPCWSTR name )
|
|
{
|
|
return GlobalAddAtomW( name );
|
|
}
|
|
|
|
|
|
/**************************************************************************
|
|
* RegisterClipboardFormatA (USER32.@)
|
|
*/
|
|
UINT WINAPI RegisterClipboardFormatA( LPCSTR name )
|
|
{
|
|
return GlobalAddAtomA( name );
|
|
}
|
|
|
|
|
|
/**************************************************************************
|
|
* GetClipboardFormatNameA (USER32.@)
|
|
*/
|
|
INT WINAPI GetClipboardFormatNameA( UINT format, LPSTR buffer, INT maxlen )
|
|
{
|
|
if (format < MAXINTATOM || format > 0xffff) return 0;
|
|
return GlobalGetAtomNameA( format, buffer, maxlen );
|
|
}
|
|
|
|
|
|
/**************************************************************************
|
|
* OpenClipboard (USER32.@)
|
|
*/
|
|
BOOL WINAPI OpenClipboard( HWND hwnd )
|
|
{
|
|
return NtUserOpenClipboard( hwnd, 0 );
|
|
}
|
|
|
|
|
|
/**************************************************************************
|
|
* SetClipboardData (USER32.@)
|
|
*/
|
|
HANDLE WINAPI SetClipboardData( UINT format, HANDLE data )
|
|
{
|
|
struct set_clipboard_params params = { .size = 0 };
|
|
HANDLE handle = data;
|
|
NTSTATUS status;
|
|
|
|
TRACE( "%s %p\n", debugstr_format( format ), data );
|
|
|
|
if (data)
|
|
{
|
|
if (!(handle = marshal_data( format, data, ¶ms.size ))) return 0;
|
|
if (!(params.data = GlobalLock( handle ))) return 0;
|
|
}
|
|
|
|
status = NtUserSetClipboardData( format, data, ¶ms );
|
|
|
|
if (params.data) GlobalUnlock( handle );
|
|
if (handle != data) GlobalFree( handle );
|
|
if (status)
|
|
{
|
|
SetLastError( RtlNtStatusToDosError( status ));
|
|
return 0;
|
|
}
|
|
return data;
|
|
}
|
|
|
|
|
|
/**************************************************************************
|
|
* EnumClipboardFormats (USER32.@)
|
|
*/
|
|
UINT WINAPI EnumClipboardFormats( UINT format )
|
|
{
|
|
return NtUserEnumClipboardFormats( format );
|
|
}
|
|
|
|
|
|
/**************************************************************************
|
|
* GetClipboardData (USER32.@)
|
|
*/
|
|
HANDLE WINAPI GetClipboardData( UINT format )
|
|
{
|
|
struct get_clipboard_params params = { .data_size = 1024 };
|
|
HANDLE ret = 0;
|
|
|
|
EnterCriticalSection( &clipboard_cs );
|
|
|
|
while (params.data_size)
|
|
{
|
|
params.size = params.data_size;
|
|
params.data_size = 0;
|
|
if (!(params.data = GlobalAlloc( GMEM_FIXED, params.size ))) break;
|
|
ret = NtUserGetClipboardData( format, ¶ms );
|
|
if (ret) break;
|
|
if (params.data_size == ~0) /* needs unmarshaling */
|
|
{
|
|
struct set_clipboard_params set_params = { .cache_only = TRUE, .seqno = params.seqno };
|
|
|
|
ret = unmarshal_data( format, params.data, params.size );
|
|
if (!NtUserSetClipboardData( format, ret, &set_params )) break;
|
|
|
|
/* data changed, retry */
|
|
free_cached_data( format, ret );
|
|
ret = 0;
|
|
params.data_size = 1024;
|
|
continue;
|
|
}
|
|
GlobalFree( params.data );
|
|
}
|
|
|
|
LeaveCriticalSection( &clipboard_cs );
|
|
return ret;
|
|
}
|