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WindowsXP-SP1/shell/lib/stockthk/rtlmir.cpp

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/****************************** Module*Header *****************************\
* Module Name: rtlmir.c *
* *
* This module contains all the Right-To-Left (RTL) Mirroring support *
* routines which are used across the whole IShell project. It abstracts *
* platform-support routines of RTL mirroring (NT5 and Memphis) and removes *
* linkage depedenency with the Mirroring APIs. *
* *
* Functions prefixed with Mirror, deal with the new Mirroring APIs *
* *
* *
* Created: 01-Feb-1998 8:41:18 pm *
* Author: Samer Arafeh [samera] *
* *
* Copyright (c) 1998 Microsoft Corporation *
\**************************************************************************/
#include "..\stock.h"
#if (WINVER < 0x0500)
#error WINVER setting must be >= 0x0500
#endif
#ifndef DS_BIDI_RTL
#define DS_BIDI_RTL 0x8000
#endif
const DWORD dwNoMirrorBitmap = NOMIRRORBITMAP;
const DWORD dwExStyleRTLMirrorWnd = WS_EX_LAYOUTRTL;
const DWORD dwExStyleNoInheritLayout = WS_EX_NOINHERITLAYOUT;
const DWORD dwPreserveBitmap = LAYOUT_BITMAPORIENTATIONPRESERVED;
/*
* Remove linkage dependecy for the RTL mirroring APIs, by retreiving
* their addresses at runtime.
*/
typedef DWORD (WINAPI *PFNGETLAYOUT)(HDC); // gdi32!GetLayout
typedef DWORD (WINAPI *PFNSETLAYOUT)(HDC, DWORD); // gdi32!SetLayout
typedef BOOL (WINAPI *PFNSETPROCESSDEFLAYOUT)(DWORD); // user32!SetProcessDefaultLayout
typedef BOOL (WINAPI *PFNGETPROCESSDEFLAYOUT)(DWORD*); // user32!GetProcessDefaultLayout
typedef LANGID (WINAPI *PFNGETUSERDEFAULTUILANGUAGE)(void); // kernel32!GetUserDefaultUILanguage
typedef BOOL (WINAPI *PFNENUMUILANGUAGES)(UILANGUAGE_ENUMPROC, DWORD, LONG_PTR); // kernel32!EnumUILanguages
typedef struct {
LANGID LangID;
BOOL bInstalled;
} MUIINSTALLLANG, *LPMUIINSTALLLANG;
#ifdef UNICODE
#define ConvertHexStringToInt ConvertHexStringToIntW
#else
#define ConvertHexStringToInt ConvertHexStringToIntA
#endif
/***************************************************************************\
* ConvertHexStringToIntA
*
* Converts a hex numeric string into an integer.
*
* History:
* 04-Feb-1998 samera Created
\***************************************************************************/
BOOL ConvertHexStringToIntA( CHAR *pszHexNum , int *piNum )
{
int n=0L;
CHAR *psz=pszHexNum;
for(n=0 ; ; psz=CharNextA(psz))
{
if( (*psz>='0') && (*psz<='9') )
n = 0x10 * n + *psz - '0';
else
{
CHAR ch = *psz;
int n2;
if(ch >= 'a')
ch -= 'a' - 'A';
n2 = ch - 'A' + 0xA;
if (n2 >= 0xA && n2 <= 0xF)
n = 0x10 * n + n2;
else
break;
}
}
/*
* Update results
*/
*piNum = n;
return (psz != pszHexNum);
}
/***************************************************************************\
* ConvertHexStringToIntW
*
* Converts a hex numeric string into an integer.
*
* History:
* 14-June-1998 msadek Created
\***************************************************************************/
BOOL ConvertHexStringToIntW( WCHAR *pszHexNum , int *piNum )
{
int n=0L;
WCHAR *psz=pszHexNum;
for(n=0 ; ; psz=CharNextW(psz))
{
if( (*psz>='0') && (*psz<='9') )
n = 0x10 * n + *psz - '0';
else
{
WCHAR ch = *psz;
int n2;
if(ch >= 'a')
ch -= 'a' - 'A';
n2 = ch - 'A' + 0xA;
if (n2 >= 0xA && n2 <= 0xF)
n = 0x10 * n + n2;
else
break;
}
}
/*
* Update results
*/
*piNum = n;
return (psz != pszHexNum);
}
/***************************************************************************\
* IsBiDiLocalizedSystemEx
*
* returns TRUE if running on a lozalized BiDi (Arabic/Hebrew) NT5 or Memphis.
* Should be called whenever SetProcessDefaultLayout is to be called.
*
* History:
* 02-Feb-1998 samera Created
\***************************************************************************/
BOOL IsBiDiLocalizedSystemEx( LANGID *pLangID )
{
int iLCID=0L;
static TRIBIT s_tbBiDi = TRIBIT_UNDEFINED;
static LANGID s_langID = MAKELANGID(LANG_NEUTRAL, SUBLANG_NEUTRAL);
if (s_tbBiDi == TRIBIT_UNDEFINED)
{
BOOL bRet = FALSE;
if(staticIsOS(OS_WIN2000ORGREATER))
{
/*
* Need to use NT5 detection method (Multiligual UI ID)
*/
s_langID = Mirror_GetUserDefaultUILanguage();
if(s_langID)
{
WCHAR wchLCIDFontSignature[16];
iLCID = MAKELCID(s_langID, SORT_DEFAULT );
/*
* Let's verify this is a RTL (BiDi) locale. Since reg value is a hex string, let's
* convert to decimal value and call GetLocaleInfo afterwards.
* LOCALE_FONTSIGNATURE always gives back 16 WCHARs.
*/
if( GetLocaleInfoW( iLCID ,
LOCALE_FONTSIGNATURE ,
(WCHAR *) &wchLCIDFontSignature[0] ,
(sizeof(wchLCIDFontSignature)/sizeof(WCHAR))) )
{
/* Let's verify the bits we have a BiDi UI locale */
if(( wchLCIDFontSignature[7] & (WCHAR)0x0800) && Mirror_IsUILanguageInstalled(s_langID) )
{
bRet = TRUE;
}
}
}
} else {
/*
* Check if BiDi-Memphis is running with Lozalized Resources (
* i.e. Arabic/Hebrew systems) -It should be enabled ofcourse-.
*/
if( (staticIsOS(OS_WIN98ORGREATER)) && (GetSystemMetrics(SM_MIDEASTENABLED)) )
{
HKEY hKey;
if( RegOpenKeyExA( HKEY_CURRENT_USER ,
"Control Panel\\Desktop\\ResourceLocale" ,
0,
KEY_READ, &hKey) == ERROR_SUCCESS)
{
CHAR szResourceLocale[12];
DWORD dwSize = sizeof(szResourceLocale);
RegQueryValueExA( hKey , "" , 0 , NULL, (LPBYTE)szResourceLocale , &dwSize );
szResourceLocale[(sizeof(szResourceLocale)/sizeof(CHAR))-1] = 0;
RegCloseKey(hKey);
if( ConvertHexStringToIntA( szResourceLocale , &iLCID ) )
{
iLCID = PRIMARYLANGID(LANGIDFROMLCID(iLCID));
if( (LANG_ARABIC == iLCID) || (LANG_HEBREW == iLCID) )
{
bRet = TRUE;
s_langID = LANGIDFROMLCID(iLCID);
}
}
}
}
}
COMPILETIME_ASSERT(sizeof(s_tbBiDi) == sizeof(long));
// close multiproc race on startup
InterlockedExchange((long*)&s_tbBiDi, bRet ? TRIBIT_TRUE : TRIBIT_FALSE);
}
if (s_tbBiDi == TRIBIT_TRUE && pLangID)
{
*pLangID = s_langID;
}
return (s_tbBiDi == TRIBIT_TRUE);
}
BOOL IsBiDiLocalizedSystem( void )
{
return IsBiDiLocalizedSystemEx(NULL);
}
/***************************************************************************\
* IsBiDiLocalizedWin95
*
* returns TRUE if running on a lozalized BiDi (Arabic/Hebrew) Win95.
* Needed for legacy operating system check for needed RTL UI elements
* For example, DefView ListView, TreeView,...etc
* History:
* 12-June-1998 a-msadek Created
\***************************************************************************/
BOOL IsBiDiLocalizedWin95(BOOL bArabicOnly)
{
HKEY hKey;
DWORD dwType;
BOOL bRet = FALSE;
CHAR szResourceLocale[12];
DWORD dwSize = sizeof(szResourceLocale)/sizeof(CHAR);
int iLCID=0L;
/*
* Check if BiDi-Win95 is running with Lozalized Resources (
* i.e. Arabic/Hebrew systems) -It should be enabled ofcourse-.
*/
if( (staticIsOS(OS_WIN95ORGREATER)) && (!staticIsOS(OS_WIN98ORGREATER)) && (GetSystemMetrics(SM_MIDEASTENABLED)) )
{
if( RegOpenKeyExA( HKEY_CURRENT_USER ,
"Control Panel\\Desktop\\ResourceLocale" ,
0,
KEY_READ, &hKey) == ERROR_SUCCESS)
{
RegQueryValueExA( hKey , "" , 0 , &dwType , (LPBYTE)szResourceLocale , &dwSize );
szResourceLocale[(sizeof(szResourceLocale)/sizeof(CHAR))-1] = 0;
RegCloseKey(hKey);
if( ConvertHexStringToIntA( szResourceLocale , &iLCID ) )
{
iLCID = PRIMARYLANGID(LANGIDFROMLCID(iLCID));
//
//If bArabicOnly we will return true if it a Arabic Win95 localized.
//
if( (LANG_ARABIC == iLCID) || ((LANG_HEBREW == iLCID) && !bArabicOnly ))
{
bRet = TRUE;
}
}
}
}
return bRet;
}
/***************************************************************************\
* Mirror_IsEnabledOS
*
* returns TRUE if the mirroring APIs are enabled on the current OS.
*
* History:
* 02-Feb-1998 samera Created
\***************************************************************************/
BOOL Mirror_IsEnabledOS( void )
{
BOOL bRet = FALSE;
if(staticIsOS(OS_WIN2000ORGREATER))
{
bRet = TRUE;
} else if( staticIsOS(OS_WIN98ORGREATER) && GetSystemMetrics(SM_MIDEASTENABLED)) {
bRet=TRUE;
}
return bRet;
}
/***************************************************************************\
* Mirror_GetUserDefaultUILanguage
*
* Reads the User UI language on NT5
*
* History:
* 22-June-1998 samera Created
\***************************************************************************/
LANGID Mirror_GetUserDefaultUILanguage( void )
{
LANGID langId=0;
static PFNGETUSERDEFAULTUILANGUAGE pfnGetUserDefaultUILanguage=NULL;
if( NULL == pfnGetUserDefaultUILanguage )
{
HMODULE hmod = GetModuleHandleA("KERNEL32");
if( hmod )
pfnGetUserDefaultUILanguage = (PFNGETUSERDEFAULTUILANGUAGE)
GetProcAddress(hmod, "GetUserDefaultUILanguage");
}
if( pfnGetUserDefaultUILanguage )
langId = pfnGetUserDefaultUILanguage();
return langId;
}
/***************************************************************************\
* Mirror_IsUILanguageInstalled
*
* Verifies that the User UI language is installed on W2k
*
* History:
* 14-June-1999 msadek Created
\***************************************************************************/
BOOL Mirror_IsUILanguageInstalled( LANGID langId )
{
MUIINSTALLLANG MUILangInstalled = {0};
MUILangInstalled.LangID = langId;
static PFNENUMUILANGUAGES pfnEnumUILanguages=NULL;
if( NULL == pfnEnumUILanguages )
{
HMODULE hmod = GetModuleHandleA("KERNEL32");
if( hmod )
pfnEnumUILanguages = (PFNENUMUILANGUAGES)
GetProcAddress(hmod, "EnumUILanguagesW");
}
if( pfnEnumUILanguages )
pfnEnumUILanguages(Mirror_EnumUILanguagesProc, 0, (LONG_PTR)&MUILangInstalled);
return MUILangInstalled.bInstalled;
}
/***************************************************************************\
* Mirror_EnumUILanguagesProc
*
* Enumerates MUI installed languages on W2k
* History:
* 14-June-1999 msadek Created
\***************************************************************************/
BOOL CALLBACK Mirror_EnumUILanguagesProc(LPTSTR lpUILanguageString, LONG_PTR lParam)
{
int langID = 0;
ConvertHexStringToInt(lpUILanguageString, &langID);
if((LANGID)langID == ((LPMUIINSTALLLANG)lParam)->LangID)
{
((LPMUIINSTALLLANG)lParam)->bInstalled = TRUE;
return FALSE;
}
return TRUE;
}
/***************************************************************************\
* Mirror_IsWindowMirroredRTL
*
* returns TRUE if the window is RTL mirrored
*
* History:
* 02-Feb-1998 samera Created
\***************************************************************************/
BOOL Mirror_IsWindowMirroredRTL( HWND hWnd )
{
return (GetWindowLongA( hWnd , GWL_EXSTYLE ) & WS_EX_LAYOUTRTL );
}
/***************************************************************************\
* Mirror_GetLayout
*
* returns TRUE if the hdc is RTL mirrored
*
* History:
* 02-Feb-1998 samera Created
\***************************************************************************/
DWORD Mirror_GetLayout( HDC hdc )
{
DWORD dwRet=0;
static PFNGETLAYOUT pfnGetLayout=NULL;
if( NULL == pfnGetLayout )
{
HMODULE hmod = GetModuleHandleA("GDI32");
if( hmod )
pfnGetLayout = (PFNGETLAYOUT)GetProcAddress(hmod, "GetLayout");
}
if( pfnGetLayout )
dwRet = pfnGetLayout( hdc );
return dwRet;
}
DWORD Mirror_IsDCMirroredRTL( HDC hdc )
{
return (Mirror_GetLayout( hdc ) & LAYOUT_RTL);
}
/***************************************************************************\
* Mirror_SetLayout
*
* RTL Mirror the hdc
*
* History:
* 02-Feb-1998 samera Created
\***************************************************************************/
DWORD Mirror_SetLayout( HDC hdc , DWORD dwLayout )
{
DWORD dwRet=0;
static PFNSETLAYOUT pfnSetLayout=NULL;
if( NULL == pfnSetLayout )
{
HMODULE hmod = GetModuleHandleA("GDI32");
if( hmod )
pfnSetLayout = (PFNSETLAYOUT)GetProcAddress(hmod, "SetLayout");
}
if( pfnSetLayout )
dwRet = pfnSetLayout( hdc , dwLayout );
return dwRet;
}
DWORD Mirror_MirrorDC( HDC hdc )
{
return Mirror_SetLayout( hdc , LAYOUT_RTL );
}
/***************************************************************************\
* Mirror_SetProcessDefaultLayout
*
* Set the process-default layout.
*
* History:
* 02-Feb-1998 samera Created
\***************************************************************************/
BOOL Mirror_SetProcessDefaultLayout( DWORD dwDefaultLayout )
{
BOOL bRet=0;
static PFNSETPROCESSDEFLAYOUT pfnSetProcessDefLayout=NULL;
if( NULL == pfnSetProcessDefLayout )
{
HMODULE hmod = GetModuleHandleA("USER32");
if( hmod )
pfnSetProcessDefLayout = (PFNSETPROCESSDEFLAYOUT)
GetProcAddress(hmod, "SetProcessDefaultLayout");
}
if( pfnSetProcessDefLayout )
bRet = pfnSetProcessDefLayout( dwDefaultLayout );
return bRet;
}
BOOL Mirror_MirrorProcessRTL( void )
{
return Mirror_SetProcessDefaultLayout( LAYOUT_RTL );
}
/***************************************************************************\
* Mirror_GetProcessDefaultLayout
*
* Get the process-default layout.
*
* History:
* 26-Feb-1998 samera Created
\***************************************************************************/
BOOL Mirror_GetProcessDefaultLayout( DWORD *pdwDefaultLayout )
{
BOOL bRet=0;
static PFNGETPROCESSDEFLAYOUT pfnGetProcessDefLayout=NULL;
if( NULL == pfnGetProcessDefLayout )
{
HMODULE hmod = GetModuleHandleA("USER32");
if( hmod )
pfnGetProcessDefLayout = (PFNGETPROCESSDEFLAYOUT)
GetProcAddress(hmod, "GetProcessDefaultLayout");
}
if( pfnGetProcessDefLayout )
bRet = pfnGetProcessDefLayout( pdwDefaultLayout );
return bRet;
}
BOOL Mirror_IsProcessRTL( void )
{
DWORD dwDefLayout=0;
return (Mirror_GetProcessDefaultLayout(&dwDefLayout) && (dwDefLayout&LAYOUT_RTL));
}
////////////////////////////////////////////////////////////////////////////
// Skip_IDorString
//
// Skips string (or ID) and returns the next aligned WORD.
////////////////////////////////////////////////////////////////////////////
PBYTE Skip_IDorString(LPBYTE pb)
{
LPWORD pw = (LPWORD)pb;
if (*pw == 0xFFFF)
return (LPBYTE)(pw + 2);
while (*pw++ != 0)
;
return (LPBYTE)pw;
}
////////////////////////////////////////////////////////////////////////////
// Skip_DialogHeader
//
// Skips the dialog header and returns the next aligned WORD.
////////////////////////////////////////////////////////////////////////////
PBYTE Skip_DialogHeader(LPDLGTEMPLATE pdt)
{
LPBYTE pb;
pb = (LPBYTE)(pdt + 1);
// If there is a menu ordinal, add 4 bytes skip it. Otherwise it is a string or just a 0.
pb = Skip_IDorString(pb);
// Skip window class and window text, adjust to next word boundary.
pb = Skip_IDorString(pb); // class
pb = Skip_IDorString(pb); // window text
// Skip font type, size and name, adjust to next dword boundary.
if (pdt->style & DS_SETFONT)
{
pb += sizeof(WORD);
pb = Skip_IDorString(pb);
}
pb = (LPBYTE)(((ULONG_PTR)pb + 3) & ~3); // DWORD align
return pb;
}
////////////////////////////////////////////////////////////////////////////
// EditBiDiDLGTemplate
//
// Edits a dialog template for BiDi stuff.
// Optionally, skipping some controls.
// Works only with DLGTEMPLATE.
////////////////////////////////////////////////////////////////////////////
void EditBiDiDLGTemplate(LPDLGTEMPLATE pdt, DWORD dwFlags, PWORD pwIgnoreList, int cIgnore)
{
LPBYTE pb;
UINT cItems;
if (!pdt)
return;
// we should never get an extended template
ASSERT (((LPDLGTEMPLATEEX)pdt)->wSignature != 0xFFFF);
if(dwFlags & EBDT_NOMIRROR)
{
// Turn off the mirroring styles for the dialog.
pdt->dwExtendedStyle &= ~(WS_EX_LAYOUTRTL | WS_EX_NOINHERITLAYOUT);
}
cItems = pdt->cdit;
// skip DLGTEMPLATE part
pb = Skip_DialogHeader(pdt);
while (cItems--)
{
UINT cbCreateParams;
int i = 0;
BOOL bIgnore = FALSE;
if(pwIgnoreList && cIgnore)
{
for(i = 0;i < cIgnore; i++)
{
if((((LPDLGITEMTEMPLATE)pb)->id == *(pwIgnoreList +i)))
{
bIgnore = TRUE;
}
}
}
if((dwFlags & EBDT_NOMIRROR) && !bIgnore)
{
// Turn off the mirroring styles for this item.
((LPDLGITEMTEMPLATE)pb)->dwExtendedStyle &= ~(WS_EX_LAYOUTRTL | WS_EX_NOINHERITLAYOUT);
}
if((dwFlags & EBDT_FLIP) && !bIgnore)
{
((LPDLGITEMTEMPLATE)pb)->x = pdt->cx - (((LPDLGITEMTEMPLATE)pb)->x + ((LPDLGITEMTEMPLATE)pb)->cx);
// BUGBUG: Should we force RTL reading order for title as well ?
// The client has the option of doining this already by PSH_RTLREADING
}
pb += sizeof(DLGITEMTEMPLATE);
// Skip the dialog control class name.
pb = Skip_IDorString(pb);
// Look at window text now.
pb = Skip_IDorString(pb);
cbCreateParams = *((LPWORD)pb);
// skip any CreateParams which include the generated size WORD.
if (cbCreateParams)
pb += cbCreateParams;
pb += sizeof(WORD);
// Point at the next dialog item. (DWORD aligned)
pb = (LPBYTE)(((ULONG_PTR)pb + 3) & ~3);
bIgnore = FALSE;
}
}
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