262 lines
4.4 KiB
C++
262 lines
4.4 KiB
C++
/*++
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Copyright (C) Microsoft Corporation, 1995 - 1999
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All rights reserved.
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Module Name:
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rtlmir.cxx
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Abstract:
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RTL (right-to-left) mirroring &
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BIDI localized support
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Author:
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Lazar Ivanov (LazarI)
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Revision History:
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Jul-29-1999 - Created.
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--*/
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#include "precomp.hxx"
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#pragma hdrstop
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#include "rtlmir.hxx"
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BOOL
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bConvertHexStringToInt(
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TCHAR *pszHexNum,
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int *piNum
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)
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/*++
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Routine Description:
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Converts a hex numeric string into an integer.
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Arguments:
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pszHexNum - thre string that needs to be converted to a number
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piNum - where to put the output number after the convertion
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Return Value:
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TRUE on sucess, FALSE otherwise
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--*/
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{
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int n=0L;
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TCHAR *psz=pszHexNum;
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for(n=0 ; ; psz=CharNext(psz))
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{
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if( (*psz >= TEXT('0')) && (*psz <= TEXT('9')) )
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n = 0x10 * n + *psz - TEXT('0');
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else
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{
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TCHAR ch = *psz;
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int n2;
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if(ch >= TEXT('a'))
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ch -= TEXT('a') - TEXT('A');
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n2 = ch - TEXT('A') + 0xA;
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if (n2 >= 0xA && n2 <= 0xF)
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n = 0x10 * n + n2;
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else
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break;
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}
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}
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/*
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* Update results
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*/
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*piNum = n;
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return (psz != pszHexNum);
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}
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BOOL
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bIsBiDiLocalizedSystemEx(
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LANGID *pLangID
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)
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/*++
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Routine Description:
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returns TRUE if running on a lozalized BiDi (Arabic/Hebrew) NT5.
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Arguments:
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pLangID - where to return the user default UI language
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Return Value:
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TRUE on sucess, FALSE otherwise
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--*/
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{
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HKEY hKey;
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DWORD dwType;
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CHAR szResourceLocale[12];
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DWORD dwSize = sizeof(szResourceLocale)/sizeof(CHAR);
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int iLCID=0L;
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BOOL bRet = FALSE;
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LANGID langID = GetUserDefaultUILanguage();
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/*
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* Need to use NT5 detection method (Multiligual UI ID)
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*/
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if( langID )
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{
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WCHAR wchLCIDFontSignature[16];
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iLCID = MAKELCID( langID , SORT_DEFAULT );
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/*
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* Let's verify this is a RTL (BiDi) locale. Since reg value is a hex string, let's
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* convert to decimal value and call GetLocaleInfo afterwards.
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* LOCALE_FONTSIGNATURE always gives back 16 WCHARs.
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*/
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if( GetLocaleInfoW( iLCID ,
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LOCALE_FONTSIGNATURE ,
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(WCHAR *) &wchLCIDFontSignature[0] ,
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(sizeof(wchLCIDFontSignature)/sizeof(WCHAR))) )
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{
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/* Let's verify the bits we have a BiDi UI locale */
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if( ( wchLCIDFontSignature[7] & (WCHAR)0x0800) && bIsUILanguageInstalled( langID ) )
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{
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bRet = TRUE;
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}
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}
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}
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if( bRet && pLangID )
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{
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*pLangID = langID;
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}
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return bRet;
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}
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BOOL
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bIsBiDiLocalizedSystem(
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VOID
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)
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/*++
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Routine Description:
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returns TRUE if running on a lozalized BiDi (Arabic/Hebrew) NT5.
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Arguments:
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None
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Return Value:
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TRUE on sucess, FALSE otherwise
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--*/
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{
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return bIsBiDiLocalizedSystemEx( NULL );
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}
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typedef struct tagMUIINSTALLLANG {
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LANGID LangID;
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BOOL bInstalled;
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} MUIINSTALLLANG, *LPMUIINSTALLLANG;
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BOOL CALLBACK
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EnumUILanguagesProc(
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LPTSTR lpUILanguageString,
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LONG_PTR lParam
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)
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/*++
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Routine Description:
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standard EnumUILanguagesProc
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Arguments:
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standard - see the SDK
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Return Value:
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standard - see the SDK
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--*/
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{
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int langID = 0;
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bConvertHexStringToInt(lpUILanguageString, &langID);
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if((LANGID)langID == ((LPMUIINSTALLLANG)lParam)->LangID)
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{
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((LPMUIINSTALLLANG)lParam)->bInstalled = TRUE;
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return FALSE;
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}
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return TRUE;
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}
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BOOL
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bIsUILanguageInstalled(
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LANGID langId
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)
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/*++
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Routine Description:
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Verifies that a particular User UI language is installed on W2k
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Arguments:
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langId - language to check for
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Return Value:
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TRUE if installed, FALSE otherwise
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--*/
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{
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MUIINSTALLLANG MUILangInstalled = {0};
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MUILangInstalled.LangID = langId;
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EnumUILanguages(EnumUILanguagesProc, 0, (LONG_PTR)&MUILangInstalled);
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return MUILangInstalled.bInstalled;
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}
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BOOL
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bIsWindowMirroredRTL(
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HWND hWnd
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)
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/*++
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Routine Description:
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Verifies whether a particular window is right-to-left mirrored.
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Arguments:
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hWnd - window to check for
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Return Value:
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TRUE if mirrored, FALSE otherwise
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--*/
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{
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return (GetWindowLongA( hWnd , GWL_EXSTYLE ) & WS_EX_LAYOUTRTL );
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}
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