windows-server-2003/base/mvdm/wow32/wmsgcb.c

/*++
 *
 *  WOW v1.0
 *
 *  Copyright (c) 1991, Microsoft Corporation
 *
 *  WMSGCB.C
 *  WOW32 16-bit message thunks
 *
 *  History:
 *  Created 11-Mar-1991 by Jeff Parsons (jeffpar)
--*/


#include "precomp.h"
#pragma hdrstop

MODNAME(wmsgcb.c);


#ifdef DEBUG

MSGINFO amiCB[] = {
   {OLDCB_GETEDITSEL,       "CB_GETEDITSEL"},       // 0x0400
   {OLDCB_LIMITTEXT,        "CB_LIMITTEXT"},        // 0x0401
   {OLDCB_SETEDITSEL,       "CB_SETEDITSEL"},       // 0x0402
   {OLDCB_ADDSTRING,        "CB_ADDSTRING"},        // 0x0403
   {OLDCB_DELETESTRING,     "CB_DELETESTRING"},     // 0x0404
   {OLDCB_DIR,          "CB_DIR"},          // 0x0405
   {OLDCB_GETCOUNT,     "CB_GETCOUNT"},         // 0x0406
   {OLDCB_GETCURSEL,        "CB_GETCURSEL"},        // 0x0407
   {OLDCB_GETLBTEXT,        "CB_GETLBTEXT"},        // 0x0408
   {OLDCB_GETLBTEXTLEN,     "CB_GETLBTEXTLEN"},     // 0x0409
   {OLDCB_INSERTSTRING,     "CB_INSERTSTRING"},     // 0x040A
   {OLDCB_RESETCONTENT,     "CB_RESETCONTENT"},     // 0x040B
   {OLDCB_FINDSTRING,       "CB_FINDSTRING"},       // 0x040C
   {OLDCB_SELECTSTRING,     "CB_SELECTSTRING"},     // 0x040D
   {OLDCB_SETCURSEL,        "CB_SETCURSEL"},        // 0x040E
   {OLDCB_SHOWDROPDOWN,     "CB_SHOWDROPDOWN"},     // 0x040F
   {OLDCB_GETITEMDATA,      "CB_GETITEMDATA"},      // 0x0410
   {OLDCB_SETITEMDATA,      "CB_SETITEMDATA"},      // 0x0411
   {OLDCB_GETDROPPEDCONTROLRECT,"CB_GETDROPPEDCONTROLRECT"},    // 0x0412
   {OLDCB_SETITEMHEIGHT,    "CB_SETITEMHEIGHT"},        // 0x0413
   {OLDCB_GETITEMHEIGHT,    "CB_GETITEMHEIGHT"},        // 0x0414
   {OLDCB_SETEXTENDEDUI,    "CB_SETEXTENDEDUI"},        // 0x0415
   {OLDCB_GETEXTENDEDUI,    "CB_GETEXTENDEDUI"},        // 0x0416
   {OLDCB_GETDROPPEDSTATE,  "CB_GETDROPPEDSTATE"},      // 0x0417
   {OLDCB_FINDSTRINGEXACT,  "CB_FINDSTRINGEXACT"},      // 0x0418
};

PSZ GetCBMsgName(WORD wMsg)
{
    INT i;
    register PMSGINFO pmi;

    for (pmi=amiCB,i=NUMEL(amiCB); i>0; i--,pmi++)
        if ((WORD)pmi->uMsg == wMsg)
        return pmi->pszMsgName;
    return GetWMMsgName(wMsg);
}

#endif



BOOL FASTCALL ThunkCBMsg16(LPMSGPARAMEX lpmpex)
{
    register PWW pww;
    WORD wMsg = lpmpex->Parm16.WndProc.wMsg;

    LOGDEBUG(7,("    Thunking 16-bit combo box message %s(%04x)\n", (LPSZ)GetCBMsgName(wMsg), wMsg));

    // Sudeepb - 04-Mar-1996
    // Fix the broken thunking for CBEC_SETCOMBOFOCUS and CBEC_KILLCOMBOFOCUS.
    // It was broken when NT user merged with Win95 where CB_MAX has changed.
    // the following code is written in such a manner that the only dependency
    // we have is that CBEC_SETCOMBOFOCUS precedes CBEC_KILLCOMBOFOCUS which
    // will always be true.


    if (wMsg == OLDCBEC_SETCOMBOFOCUS || wMsg == OLDCBEC_KILLCOMBOFOCUS) {
        lpmpex->uMsg = (WORD)(wMsg - OLDCBEC_SETCOMBOFOCUS + CBEC_SETCOMBOFOCUS);
        return  TRUE;
    }

    wMsg -= WM_USER;

    //
    // For app defined (control) messages that are out of range
    // return TRUE.
    //
    // ChandanC Sept-15-1992
    //

    if (wMsg < (CB_FINDSTRINGEXACT - CB_GETEDITSEL + 4)) {

        switch(lpmpex->uMsg = wMsg + CB_GETEDITSEL) {
            case CB_SELECTSTRING:
            case CB_FINDSTRINGEXACT:
            case CB_FINDSTRING:
            case CB_INSERTSTRING:
            case CB_ADDSTRING:
                if (!(pww = lpmpex->pww))
                    return FALSE;
        
                if (!(pww->style & (CBS_OWNERDRAWFIXED|CBS_OWNERDRAWVARIABLE)) ||
                       (pww->style & (CBS_HASSTRINGS))) {
                    GETPSZPTR(lpmpex->Parm16.WndProc.lParam, (LPSZ)lpmpex->lParam);
                }
                break;
        
        
            case CB_GETLBTEXT:
                if (NULL != (pww = lpmpex->pww)) {
	                register PTHUNKTEXTDWORD pthkdword = (PTHUNKTEXTDWORD)lpmpex->MsgBuffer;

	                //  see comments in the file wmsglb.c 
                    //

                        pthkdword->fDWORD = (pww->style & (CBS_OWNERDRAWFIXED|CBS_OWNERDRAWVARIABLE)) &&
                                            !(pww->style & (CBS_HASSTRINGS));
	
	                if (pthkdword->fDWORD) {
	                    lpmpex->lParam = (LPARAM)(LPVOID)&pthkdword->dwDataItem;
                        break;
	                }
	            }
                else {
                    register PTHUNKTEXTDWORD pthkdword = (PTHUNKTEXTDWORD)lpmpex->MsgBuffer;
                    pthkdword->fDWORD = FALSE;
                }
                
                GETPSZPTR(lpmpex->Parm16.WndProc.lParam, (LPSZ)lpmpex->lParam);
                break;
	 
            case CB_DIR:
                GETPSZPTR(lpmpex->Parm16.WndProc.lParam, (LPSZ)lpmpex->lParam);

                if (W32CheckThunkParamFlag()) {
                    AddParamMap(lpmpex->lParam, lpmpex->Parm16.WndProc.lParam);
                }
                break;

            case CB_GETDROPPEDCONTROLRECT:
                lpmpex->lParam = (LONG)lpmpex->MsgBuffer;
                break;
        }
    }
    return TRUE;
}


VOID FASTCALL UnThunkCBMsg16(LPMSGPARAMEX lpmpex)
{
    switch(lpmpex->uMsg) {

        case CB_GETLBTEXT:
	        {
	           register PTHUNKTEXTDWORD pthkdword = (PTHUNKTEXTDWORD)lpmpex->MsgBuffer;
	
	           if ((pthkdword->fDWORD) && (lpmpex->lReturn != CB_ERR)) { 
	                // this is a dword, not a string
	                // assign the dword as unaligned
	                UNALIGNED DWORD *lpdwDataItem;
	
	                GETVDMPTR((lpmpex->Parm16.WndProc.lParam), sizeof(DWORD), lpdwDataItem);
	                *lpdwDataItem = pthkdword->dwDataItem;
	                FREEVDMPTR(lpdwDataItem);
	                break;
	           }
	 
	        }
	
	        // fall through to the common code

        case CB_ADDSTRING:
        case CB_FINDSTRING:
        case CB_FINDSTRINGEXACT:
        case CB_INSERTSTRING:
        case CB_SELECTSTRING:
            FREEPSZPTR((LPSZ)lpmpex->lParam);
            break;

        case CB_DIR:
            if (W32CheckThunkParamFlag()) {
                DeleteParamMap(lpmpex->lParam, PARAM_32, NULL);
            }

            FREEPSZPTR((LPSZ)lpmpex->lParam);
            break;

        case CB_GETDROPPEDCONTROLRECT:
            if (lpmpex->lParam) {
                putrect16((VPRECT16)lpmpex->Parm16.WndProc.lParam, (LPRECT)lpmpex->lParam);
            }
            break;
    }
}