wine/dlls/gdi32/bidi.c
2006-11-17 14:52:07 +01:00

116 lines
3.5 KiB
C

/*
* GDI BiDirectional handling
*
* Copyright 2003 Shachar Shemesh
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "config.h"
#include <stdarg.h>
#ifdef HAVE_UNICODE_UBIDI_H
#include <unicode/ubidi.h>
#endif
#include "windef.h"
#include "winbase.h"
#include "wingdi.h"
#include "wine/debug.h"
#include "gdi_private.h"
WINE_DEFAULT_DEBUG_CHANNEL(bidi);
#ifdef HAVE_ICU
BOOL BidiAvail = TRUE;
#else
BOOL BidiAvail = FALSE;
#endif
/*************************************************************
* BIDI_Reorder
*/
BOOL BIDI_Reorder(
LPCWSTR lpString, /* [in] The string for which information is to be returned */
INT uCount, /* [in] Number of WCHARs in string. */
DWORD dwFlags, /* [in] GetCharacterPlacement compatible flags specifying how to process the string */
DWORD dwWineGCP_Flags, /* [in] Wine internal flags - Force paragraph direction */
LPWSTR lpOutString, /* [out] Reordered string */
INT uCountOut, /* [in] Size of output buffer */
UINT *lpOrder /* [out] Logical -> Visual order map */
)
{
TRACE("%s, %d, 0x%08x lpOutString=%p, lpOrder=%p\n",
debugstr_wn(lpString, uCount), uCount, dwFlags,
lpOutString, lpOrder);
#ifdef HAVE_ICU
if ((dwFlags & GCP_REORDER) != 0) {
UBiDi *bidi;
UErrorCode err=0;
UBiDiLevel level=0;
bidi=ubidi_open();
if( bidi==NULL ) {
WARN("Failed to allocate structure\n");
SetLastError(ERROR_NOT_ENOUGH_MEMORY);
return FALSE;
}
switch( dwWineGCP_Flags&WINE_GCPW_DIR_MASK )
{
case WINE_GCPW_FORCE_LTR:
level=0;
break;
case WINE_GCPW_FORCE_RTL:
level=1;
break;
case WINE_GCPW_LOOSE_LTR:
level=UBIDI_DEFAULT_LTR;
break;
case WINE_GCPW_LOOSE_RTL:
level=UBIDI_DEFAULT_RTL;
break;
}
ubidi_setPara( bidi, lpString, uCount, level, NULL, &err );
if( lpOutString!=NULL ) {
ubidi_writeReordered( bidi, lpOutString, uCount,
(dwFlags&GCP_SYMSWAPOFF)?0:UBIDI_DO_MIRRORING, &err );
}
if( lpOrder!=NULL ) {
ubidi_getLogicalMap( bidi, lpOrder, &err );
}
ubidi_close( bidi );
if( U_FAILURE(err) ) {
FIXME("ICU Library return error code %d.\n", err );
FIXME("Please report this error to wine-devel@winehq.org so we can place "
"descriptive Windows error codes here\n");
SetLastError(ERROR_INVALID_LEVEL); /* This error is cryptic enough not to mean anything, I hope */
return FALSE;
}
}
return TRUE;
#else /* HAVE_ICU */
return FALSE;
#endif /* HAVE_ICU */
}