Leaked source code of windows server 2003
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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 "pch.hxx"
#if WINVER < 0X0500
#include "mirport.h"
#endif
#include "mirror.h"
const DWORD dwNoMirrorBitmap = NOMIRRORBITMAP;
const DWORD dwExStyleRTLMirrorWnd = WS_EX_LAYOUTRTL;
const DWORD dwPreserveBitmap = LAYOUT_BITMAPORIENTATIONPRESERVED;
/*
* Remove linkage dependecy for the RTL mirroring APIs, by retreiving
* their addresses at runtime.
*/
typedef DWORD (*PFNGETLAYOUT)(HDC); // gdi32!GetLayout
typedef DWORD (*PFNSETLAYOUT)(HDC, DWORD); // gdi32!SetLayout
typedef BOOL (*PFNSETPROCESSDEFLAYOUT)(DWORD); // user32!SetProcessDefaultLayout
typedef BOOL (*PFNGETPROCESSDEFLAYOUT)(DWORD*); // user32!GetProcessDefaultLayout
typedef LANGID (*PFNGETUSERDEFAULTUILANGUAGE)(void); // kernel32!GetUserDefaultUILanguage
#define OS_WINDOWS 0 // windows vs. NT
#define OS_NT 1 // windows vs. NT
#define OS_WIN95 2
#define OS_NT4 3
#define OS_NT5 4
#define OS_MEMPHIS 5
/*----------------------------------------------------------
Purpose: Returns TRUE/FALSE if the platform is the given OS_ value.
*/
STDAPI_(BOOL) MirLibIsOS(DWORD dwOS)
{
BOOL bRet;
static OSVERSIONINFOA s_osvi;
static BOOL s_bVersionCached = FALSE;
if (!s_bVersionCached)
{
s_bVersionCached = TRUE;
s_osvi.dwOSVersionInfoSize = sizeof(s_osvi);
GetVersionExA(&s_osvi);
}
switch (dwOS)
{
case OS_WINDOWS:
bRet = (VER_PLATFORM_WIN32_WINDOWS == s_osvi.dwPlatformId);
break;
case OS_NT:
bRet = (VER_PLATFORM_WIN32_NT == s_osvi.dwPlatformId);
break;
case OS_WIN95:
bRet = (VER_PLATFORM_WIN32_WINDOWS == s_osvi.dwPlatformId &&
s_osvi.dwMajorVersion >= 4);
break;
case OS_MEMPHIS:
bRet = (VER_PLATFORM_WIN32_WINDOWS == s_osvi.dwPlatformId &&
(s_osvi.dwMajorVersion > 4 ||
s_osvi.dwMajorVersion == 4 && s_osvi.dwMinorVersion >= 10));
break;
case OS_NT4:
bRet = (VER_PLATFORM_WIN32_NT == s_osvi.dwPlatformId &&
s_osvi.dwMajorVersion >= 4);
break;
case OS_NT5:
bRet = (VER_PLATFORM_WIN32_NT == s_osvi.dwPlatformId &&
s_osvi.dwMajorVersion >= 5);
break;
default:
bRet = FALSE;
break;
}
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_EnableWindowLayoutInheritance
*
* returns TRUE if the window is RTL mirrored
*
* History:
* 14-April-1998 a-msadek Created
\***************************************************************************/
LONG Mirror_EnableWindowLayoutInheritance( HWND hWnd )
{
return SetWindowLongA(hWnd, GWL_EXSTYLE, GetWindowLongA( hWnd , GWL_EXSTYLE ) & ~WS_EX_NOINHERITLAYOUT );
}
/***************************************************************************\
* Mirror_DisableWindowLayoutInheritance
*
* returns TRUE if the window is RTL mirrored
*
* History:
* 14-April-1998 a-msadek Created
\***************************************************************************/
LONG Mirror_DisableWindowLayoutInheritance( HWND hWnd )
{
return SetWindowLongA(hWnd, GWL_EXSTYLE, GetWindowLongA( hWnd , GWL_EXSTYLE ) | WS_EX_NOINHERITLAYOUT );
}
/***************************************************************************\
* ConvertHexStringToInt
*
* Converts a hex numeric string into an integer.
*
* History:
* 04-Feb-1998 samera Created
\***************************************************************************/
BOOL ConvertHexStringToInt( 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);
}
/***************************************************************************\
* IsBiDiLocalizedSystem
*
* 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 IsBiDiLocalizedSystem( void )
{
HKEY hKey;
DWORD dwType;
CHAR szResourceLocale[12];
DWORD dwSize = sizeof(szResourceLocale)/sizeof(CHAR);
LANGID langID;
int iLCID=0L;
static BOOL bRet = (BOOL)(DWORD)-1;
if (bRet != (BOOL)(DWORD)-1)
{
return bRet;
}
bRet = FALSE;
if( MirLibIsOS( OS_NT5 ) )
{
/*
* Need to use NT5 detection method (Multiligual UI ID)
*/
langID = Mirror_GetUserDefaultUILanguage();
if( langID )
{
WCHAR wchLCIDFontSignature[16];
iLCID = MAKELCID( 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 )
{
bRet = TRUE;
}
}
}
} else {
/*
* Check if BiDi-Memphis is running with Lozalized Resources (
* i.e. Arabic/Hebrew systems) -It should be enabled ofcourse-.
*/
if( (MirLibIsOS(OS_MEMPHIS)) && (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( ConvertHexStringToInt( szResourceLocale , &iLCID ) )
{
iLCID = PRIMARYLANGID(LANGIDFROMLCID(iLCID));
if( (LANG_ARABIC == iLCID) || (LANG_HEBREW == iLCID) )
{
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( MirLibIsOS(OS_NT5) )
{
bRet = TRUE;
} else if( MirLibIsOS(OS_MEMPHIS) && GetSystemMetrics(SM_MIDEASTENABLED)) {
bRet=TRUE;
}
return bRet;
}
/***************************************************************************\
* 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;
static BOOL bRet = (BOOL)(DWORD)-1;
if (bRet != (BOOL)(DWORD)-1)
{
return bRet;
}
bRet = FALSE;
bRet = (Mirror_GetProcessDefaultLayout(&dwDefLayout) && (dwDefLayout&LAYOUT_RTL));
return bRet;
}