477 lines
14 KiB
C++
477 lines
14 KiB
C++
/****************************** Module*Header *****************************\
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* Module Name: rtlmir.c *
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* *
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* This module contains all the Right-To-Left (RTL) Mirroring support *
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* routines which are used across the whole IShell project. It abstracts *
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* platform-support routines of RTL mirroring (NT5 and Memphis) and removes *
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* linkage depedenency with the Mirroring APIs. *
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* *
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* Functions prefixed with Mirror, deal with the new Mirroring APIs *
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* *
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* *
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* Created: 01-Feb-1998 8:41:18 pm *
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* Author: Samer Arafeh [samera] *
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* *
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* Copyright (c) 1998 Microsoft Corporation *
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\**************************************************************************/
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#include "pch.hxx"
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#if WINVER < 0X0500
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#include "mirport.h"
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#endif
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#include "mirror.h"
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const DWORD dwNoMirrorBitmap = NOMIRRORBITMAP;
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const DWORD dwExStyleRTLMirrorWnd = WS_EX_LAYOUTRTL;
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const DWORD dwPreserveBitmap = LAYOUT_BITMAPORIENTATIONPRESERVED;
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/*
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* Remove linkage dependecy for the RTL mirroring APIs, by retreiving
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* their addresses at runtime.
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*/
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typedef DWORD (*PFNGETLAYOUT)(HDC); // gdi32!GetLayout
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typedef DWORD (*PFNSETLAYOUT)(HDC, DWORD); // gdi32!SetLayout
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typedef BOOL (*PFNSETPROCESSDEFLAYOUT)(DWORD); // user32!SetProcessDefaultLayout
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typedef BOOL (*PFNGETPROCESSDEFLAYOUT)(DWORD*); // user32!GetProcessDefaultLayout
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typedef LANGID (*PFNGETUSERDEFAULTUILANGUAGE)(void); // kernel32!GetUserDefaultUILanguage
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#define OS_WINDOWS 0 // windows vs. NT
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#define OS_NT 1 // windows vs. NT
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#define OS_WIN95 2
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#define OS_NT4 3
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#define OS_NT5 4
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#define OS_MEMPHIS 5
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/*----------------------------------------------------------
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Purpose: Returns TRUE/FALSE if the platform is the given OS_ value.
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*/
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STDAPI_(BOOL) MirLibIsOS(DWORD dwOS)
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{
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BOOL bRet;
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static OSVERSIONINFOA s_osvi;
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static BOOL s_bVersionCached = FALSE;
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if (!s_bVersionCached)
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{
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s_bVersionCached = TRUE;
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s_osvi.dwOSVersionInfoSize = sizeof(s_osvi);
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GetVersionExA(&s_osvi);
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}
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switch (dwOS)
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{
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case OS_WINDOWS:
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bRet = (VER_PLATFORM_WIN32_WINDOWS == s_osvi.dwPlatformId);
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break;
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case OS_NT:
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bRet = (VER_PLATFORM_WIN32_NT == s_osvi.dwPlatformId);
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break;
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case OS_WIN95:
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bRet = (VER_PLATFORM_WIN32_WINDOWS == s_osvi.dwPlatformId &&
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s_osvi.dwMajorVersion >= 4);
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break;
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case OS_MEMPHIS:
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bRet = (VER_PLATFORM_WIN32_WINDOWS == s_osvi.dwPlatformId &&
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(s_osvi.dwMajorVersion > 4 ||
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s_osvi.dwMajorVersion == 4 && s_osvi.dwMinorVersion >= 10));
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break;
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case OS_NT4:
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bRet = (VER_PLATFORM_WIN32_NT == s_osvi.dwPlatformId &&
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s_osvi.dwMajorVersion >= 4);
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break;
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case OS_NT5:
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bRet = (VER_PLATFORM_WIN32_NT == s_osvi.dwPlatformId &&
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s_osvi.dwMajorVersion >= 5);
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break;
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default:
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bRet = FALSE;
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break;
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}
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return bRet;
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}
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/***************************************************************************\
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* Mirror_GetUserDefaultUILanguage
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*
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* Reads the User UI language on NT5
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*
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* History:
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* 22-June-1998 samera Created
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\***************************************************************************/
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LANGID Mirror_GetUserDefaultUILanguage( void )
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{
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LANGID langId=0;
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static PFNGETUSERDEFAULTUILANGUAGE pfnGetUserDefaultUILanguage=NULL;
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if( NULL == pfnGetUserDefaultUILanguage )
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{
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HMODULE hmod = GetModuleHandleA("KERNEL32");
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if( hmod )
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pfnGetUserDefaultUILanguage = (PFNGETUSERDEFAULTUILANGUAGE)
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GetProcAddress(hmod, "GetUserDefaultUILanguage");
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}
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if( pfnGetUserDefaultUILanguage )
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langId = pfnGetUserDefaultUILanguage();
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return langId;
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}
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/***************************************************************************\
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* Mirror_EnableWindowLayoutInheritance
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*
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* returns TRUE if the window is RTL mirrored
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*
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* History:
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* 14-April-1998 a-msadek Created
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\***************************************************************************/
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LONG Mirror_EnableWindowLayoutInheritance( HWND hWnd )
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{
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return SetWindowLongA(hWnd, GWL_EXSTYLE, GetWindowLongA( hWnd , GWL_EXSTYLE ) & ~WS_EX_NOINHERITLAYOUT );
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}
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/***************************************************************************\
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* Mirror_DisableWindowLayoutInheritance
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*
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* returns TRUE if the window is RTL mirrored
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*
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* History:
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* 14-April-1998 a-msadek Created
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\***************************************************************************/
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LONG Mirror_DisableWindowLayoutInheritance( HWND hWnd )
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{
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return SetWindowLongA(hWnd, GWL_EXSTYLE, GetWindowLongA( hWnd , GWL_EXSTYLE ) | WS_EX_NOINHERITLAYOUT );
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}
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/***************************************************************************\
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* ConvertHexStringToInt
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*
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* Converts a hex numeric string into an integer.
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*
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* History:
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* 04-Feb-1998 samera Created
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\***************************************************************************/
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BOOL ConvertHexStringToInt( CHAR *pszHexNum , int *piNum )
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{
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int n=0L;
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CHAR *psz=pszHexNum;
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for(n=0 ; ; psz=CharNextA(psz))
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{
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if( (*psz>='0') && (*psz<='9') )
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n = 0x10 * n + *psz - '0';
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else
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{
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CHAR ch = *psz;
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int n2;
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if(ch >= 'a')
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ch -= 'a' - 'A';
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n2 = ch - '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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/***************************************************************************\
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* IsBiDiLocalizedSystem
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*
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* returns TRUE if running on a lozalized BiDi (Arabic/Hebrew) NT5 or Memphis.
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* Should be called whenever SetProcessDefaultLayout is to be called.
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*
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* History:
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* 02-Feb-1998 samera Created
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\***************************************************************************/
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BOOL IsBiDiLocalizedSystem( void )
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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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LANGID langID;
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int iLCID=0L;
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static BOOL bRet = (BOOL)(DWORD)-1;
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if (bRet != (BOOL)(DWORD)-1)
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{
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return bRet;
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}
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bRet = FALSE;
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if( MirLibIsOS( OS_NT5 ) )
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{
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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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langID = Mirror_GetUserDefaultUILanguage();
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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 )
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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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} else {
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/*
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* Check if BiDi-Memphis is running with Lozalized Resources (
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* i.e. Arabic/Hebrew systems) -It should be enabled ofcourse-.
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*/
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if( (MirLibIsOS(OS_MEMPHIS)) && (GetSystemMetrics(SM_MIDEASTENABLED)) )
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{
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if( RegOpenKeyExA( HKEY_CURRENT_USER ,
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"Control Panel\\Desktop\\ResourceLocale" ,
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0,
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KEY_READ, &hKey) == ERROR_SUCCESS)
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{
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RegQueryValueExA( hKey , "" , 0 , &dwType , (LPBYTE)szResourceLocale , &dwSize );
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szResourceLocale[(sizeof(szResourceLocale)/sizeof(CHAR))-1] = 0;
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RegCloseKey(hKey);
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if( ConvertHexStringToInt( szResourceLocale , &iLCID ) )
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{
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iLCID = PRIMARYLANGID(LANGIDFROMLCID(iLCID));
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if( (LANG_ARABIC == iLCID) || (LANG_HEBREW == iLCID) )
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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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}
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}
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return bRet;
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}
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/***************************************************************************\
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* Mirror_IsEnabledOS
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*
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* returns TRUE if the mirroring APIs are enabled on the current OS.
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*
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* History:
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* 02-Feb-1998 samera Created
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\***************************************************************************/
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BOOL Mirror_IsEnabledOS( void )
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{
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BOOL bRet = FALSE;
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if( MirLibIsOS(OS_NT5) )
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{
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bRet = TRUE;
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} else if( MirLibIsOS(OS_MEMPHIS) && GetSystemMetrics(SM_MIDEASTENABLED)) {
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bRet=TRUE;
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}
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return bRet;
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}
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/***************************************************************************\
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* Mirror_IsWindowMirroredRTL
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*
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* returns TRUE if the window is RTL mirrored
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*
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* History:
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* 02-Feb-1998 samera Created
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\***************************************************************************/
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BOOL Mirror_IsWindowMirroredRTL( HWND hWnd )
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{
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return (GetWindowLongA( hWnd , GWL_EXSTYLE ) & WS_EX_LAYOUTRTL );
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}
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/***************************************************************************\
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* Mirror_GetLayout
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*
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* returns TRUE if the hdc is RTL mirrored
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*
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* History:
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* 02-Feb-1998 samera Created
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\***************************************************************************/
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DWORD Mirror_GetLayout( HDC hdc )
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{
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DWORD dwRet=0;
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static PFNGETLAYOUT pfnGetLayout=NULL;
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if( NULL == pfnGetLayout )
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{
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HMODULE hmod = GetModuleHandleA("GDI32");
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if( hmod )
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pfnGetLayout = (PFNGETLAYOUT)GetProcAddress(hmod, "GetLayout");
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}
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if( pfnGetLayout )
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dwRet = pfnGetLayout( hdc );
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return dwRet;
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}
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DWORD Mirror_IsDCMirroredRTL( HDC hdc )
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{
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return (Mirror_GetLayout( hdc ) & LAYOUT_RTL);
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}
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/***************************************************************************\
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* Mirror_SetLayout
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*
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* RTL Mirror the hdc
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*
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* History:
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* 02-Feb-1998 samera Created
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\***************************************************************************/
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DWORD Mirror_SetLayout( HDC hdc , DWORD dwLayout )
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{
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DWORD dwRet=0;
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static PFNSETLAYOUT pfnSetLayout=NULL;
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if( NULL == pfnSetLayout )
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{
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HMODULE hmod = GetModuleHandleA("GDI32");
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if( hmod )
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pfnSetLayout = (PFNSETLAYOUT)GetProcAddress(hmod, "SetLayout");
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}
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if( pfnSetLayout )
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dwRet = pfnSetLayout( hdc , dwLayout );
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return dwRet;
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}
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DWORD Mirror_MirrorDC( HDC hdc )
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{
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return Mirror_SetLayout( hdc , LAYOUT_RTL );
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}
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/***************************************************************************\
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* Mirror_SetProcessDefaultLayout
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*
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* Set the process-default layout.
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*
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* History:
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* 02-Feb-1998 samera Created
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\***************************************************************************/
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BOOL Mirror_SetProcessDefaultLayout( DWORD dwDefaultLayout )
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{
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BOOL bRet=0;
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static PFNSETPROCESSDEFLAYOUT pfnSetProcessDefLayout=NULL;
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if( NULL == pfnSetProcessDefLayout )
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{
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HMODULE hmod = GetModuleHandleA("USER32");
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if( hmod )
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pfnSetProcessDefLayout = (PFNSETPROCESSDEFLAYOUT)
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GetProcAddress(hmod, "SetProcessDefaultLayout");
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}
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if( pfnSetProcessDefLayout )
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bRet = pfnSetProcessDefLayout( dwDefaultLayout );
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return bRet;
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}
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BOOL Mirror_MirrorProcessRTL( void )
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{
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return Mirror_SetProcessDefaultLayout( LAYOUT_RTL );
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}
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/***************************************************************************\
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* Mirror_GetProcessDefaultLayout
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*
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* Get the process-default layout.
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*
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* History:
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* 26-Feb-1998 samera Created
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\***************************************************************************/
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BOOL Mirror_GetProcessDefaultLayout( DWORD *pdwDefaultLayout )
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{
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BOOL bRet=0;
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static PFNGETPROCESSDEFLAYOUT pfnGetProcessDefLayout=NULL;
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if( NULL == pfnGetProcessDefLayout )
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{
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HMODULE hmod = GetModuleHandleA("USER32");
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if( hmod )
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pfnGetProcessDefLayout = (PFNGETPROCESSDEFLAYOUT)
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GetProcAddress(hmod, "GetProcessDefaultLayout");
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}
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if( pfnGetProcessDefLayout )
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bRet = pfnGetProcessDefLayout( pdwDefaultLayout );
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return bRet;
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}
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BOOL Mirror_IsProcessRTL( void )
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{
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DWORD dwDefLayout=0;
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static BOOL bRet = (BOOL)(DWORD)-1;
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if (bRet != (BOOL)(DWORD)-1)
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{
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return bRet;
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}
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bRet = FALSE;
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bRet = (Mirror_GetProcessDefaultLayout(&dwDefLayout) && (dwDefLayout&LAYOUT_RTL));
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return bRet;
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}
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