/* $Id: objhandle.cpp,v 1.32 2004-01-11 11:42:18 sandervl Exp $ */
/*
 * Win32 Handle Management Code for OS/2
 *
 *
 * Copyright 2000-2002 Sander van Leeuwen (sandervl@xs4all.nl)
 * Copyright 2003 Innotek Systemberatung GmbH (sandervl@innotek.de)
 *
 * TODO: The table should be dynamically increased when necessary
 *       This is just a quick and dirty implementation
 *
 *       System objects can't be deleted (TODO: any others?? (fonts?))!!!!)
 *
 * Project Odin Software License can be found in LICENSE.TXT
 *
 */

#include <os2win.h>
#include <stdlib.h>
#include <string.h>
#include <vmutex.h>
#include <objhandle.h>
#include <dcdata.h>
#include <winuser32.h>
#include "oslibgpi.h"
#include "dibsect.h"
#include "region.h"
#include <unicode.h>
#include "font.h"
#include <stats.h>

#define DBG_LOCALLOG    DBG_objhandle
#include "dbglocal.h"

//TODO: must use 16 bits gdi object handles
#define GDIOBJ_PREFIX 0xe7000000

//******************************************************************************

typedef struct _GdiObject
{
  DWORD              dwUserData;
  DWORD              dwGDI32Data;
  DWORD              dwFlags;
  DWORD              dwType;
#ifdef DEBUG
  DWORD              dwTime;
  struct _GdiObject *prev;
#endif
  struct _GdiObject *next;
} GdiObject;

typedef struct
{
  GdiObject *headfree;
  GdiObject *tailfree;
  GdiObject *objects;
  int        iAllocated;
#ifdef DEBUG
  DWORD      dwMaxAllocated;
#endif
} GdiObjectTable;

static GdiObjectTable  objHandleTable = { 0 };
static VMutex          objTableMutex;

//******************************************************************************
//******************************************************************************
BOOL WIN32API ObjAllocateHandle(HANDLE *hObject, DWORD dwUserData, DWORD dwType)
{
    DWORD oldlowestidx;
    BOOL  retry = FALSE;

    objTableMutex.enter();
    if(objHandleTable.objects == NULL)
    {
        objHandleTable.objects = (GdiObject *)malloc(MAX_OBJECT_HANDLES*sizeof(GdiObject));
        if(objHandleTable.objects == NULL) {
            DebugInt3();
            return FALSE;
        }
        memset(objHandleTable.objects, 0, MAX_OBJECT_HANDLES*sizeof(GdiObject));
        if(objHandleTable.objects[0].dwType == HNDL_NONE) {
            //first handle can never be used
            objHandleTable.objects[0].dwType     = HNDL_INVALID;
            objHandleTable.objects[0].dwUserData = -1;
            objHandleTable.objects[0].dwFlags    = OBJHANDLE_FLAG_NODELETE;
        }
        objHandleTable.tailfree = &objHandleTable.objects[MAX_OBJECT_HANDLES-1];
        for(int i=MAX_OBJECT_HANDLES-1;i>0;i--)
        {
            GdiObject *obj = &objHandleTable.objects[i];

#ifdef DEBUG
            if(objHandleTable.headfree) {
                objHandleTable.headfree->prev = obj;
            }
            obj->prev = NULL;
#endif
            obj->next = objHandleTable.headfree;
            objHandleTable.headfree = obj;
        }
        objHandleTable.iAllocated = 1; //one invalid object
    }

    GdiObject *newobj = objHandleTable.headfree;
    if(newobj == NULL) {
        //oops, out of handles
        objTableMutex.leave();
        dprintf(("ERROR: GDI: ObjAllocateHandle OUT OF GDI OBJECT HANDLES!!"));
        DebugInt3();
        return FALSE;
    }
    objHandleTable.headfree = newobj->next;
    //if there's nothing left, then there's nothing left
    if(objHandleTable.headfree == NULL) {
         dprintf(("WARNING: Just allocated our last GDI handle..."));
         objHandleTable.tailfree = NULL;
    }
#ifdef DEBUG
    else objHandleTable.headfree->prev = NULL;
    newobj->prev = NULL;
    newobj->dwTime = GetCurrentTime();
#endif

    newobj->next = NULL;

    *hObject = MAKE_HANDLE(((char *)newobj - (char *)objHandleTable.objects)/sizeof(*newobj));
    newobj->dwUserData  = dwUserData;
    newobj->dwType      = dwType;
    newobj->dwGDI32Data = 0;
    newobj->dwFlags     = 0;

    objHandleTable.iAllocated++;
#ifdef DEBUG
    if(objHandleTable.iAllocated > objHandleTable.dwMaxAllocated) {
        objHandleTable.dwMaxAllocated = objHandleTable.iAllocated;
    }
#endif
    objTableMutex.leave();
    dprintf2(("ObjAllocateHandle %x type %d", *hObject, dwType));
    return TRUE;
}
//******************************************************************************
//******************************************************************************
BOOL WIN32API ObjDeleteHandle(HANDLE hObject, DWORD dwType)
{
    hObject &= OBJHANDLE_MAGIC_MASK;
    if(hObject < MAX_OBJECT_HANDLES)
    {
        objTableMutex.enter();
        GdiObject *obj = &objHandleTable.objects[hObject];
        if(!(obj->dwFlags & OBJHANDLE_FLAG_NODELETE))
        {
            dprintf2(("ObjDeleteHandle %x type %d", MAKE_HANDLE(hObject), obj->dwType));

            obj->dwUserData = 0;
            obj->dwType     = HNDL_NONE;
            obj->next       = NULL;

            //add to the tail of the free object list
            if(objHandleTable.tailfree)
                objHandleTable.tailfree->next = obj;

#ifdef DEBUG
            obj->prev       = objHandleTable.tailfree;
#endif
            objHandleTable.tailfree = obj;
            if(objHandleTable.headfree == NULL)
                objHandleTable.headfree = obj;

            objHandleTable.iAllocated--;
            if(objHandleTable.iAllocated < 0) DebugInt3();
        }
        else {
            dprintf(("ObjDeleteHandle: unable to delete system object %x", MAKE_HANDLE(hObject)));
        }
        objTableMutex.leave();
        return TRUE;
    }
    return FALSE;
}
//******************************************************************************
//******************************************************************************
DWORD WIN32API ObjQueryHandleData(HANDLE hObject, DWORD dwType)
{
    DWORD dwUserData = HANDLE_INVALID_DATA;

    objTableMutex.enter();
    hObject &= OBJHANDLE_MAGIC_MASK;
    if(hObject < MAX_OBJECT_HANDLES &&
       ((dwType == HNDL_ANY && objHandleTable.objects[hObject].dwType != HNDL_NONE) ||
       dwType == objHandleTable.objects[hObject].dwType))
    {
        dwUserData = objHandleTable.objects[hObject].dwUserData;
    }
    objTableMutex.leave();
    return dwUserData;
}
//******************************************************************************
//******************************************************************************
BOOL WIN32API ObjSetHandleData(HANDLE hObject, DWORD dwType, DWORD dwUserData)
{
    BOOL fSuccess = FALSE;

    objTableMutex.enter();
    hObject &= OBJHANDLE_MAGIC_MASK;
    if(hObject < MAX_OBJECT_HANDLES &&
       ((dwType == HNDL_ANY && objHandleTable.objects[hObject].dwType != HNDL_NONE) ||
       dwType == objHandleTable.objects[hObject].dwType))
    {
        objHandleTable.objects[hObject].dwUserData = dwUserData;
        fSuccess = TRUE;
    }
    objTableMutex.leave();
    return fSuccess;
}
//******************************************************************************
//******************************************************************************
DWORD WIN32API ObjQueryHandleGDI32Data(HANDLE hObject, DWORD dwType)
{
    DWORD dwGDI32Data = HANDLE_INVALID_DATA;

    objTableMutex.enter();
    hObject &= OBJHANDLE_MAGIC_MASK;
    if(hObject < MAX_OBJECT_HANDLES &&
       ((dwType == HNDL_ANY && objHandleTable.objects[hObject].dwType != HNDL_NONE) ||
       dwType == objHandleTable.objects[hObject].dwType))
    {
        dwGDI32Data = objHandleTable.objects[hObject].dwGDI32Data;
    }
    objTableMutex.leave();
    return dwGDI32Data;
}
//******************************************************************************
//******************************************************************************
BOOL WIN32API ObjSetHandleGDI32Data(HANDLE hObject, DWORD dwType, DWORD dwGDI32Data)
{
    BOOL fSuccess = FALSE;

    objTableMutex.enter();
    hObject &= OBJHANDLE_MAGIC_MASK;
    if(hObject < MAX_OBJECT_HANDLES &&
       ((dwType == HNDL_ANY && objHandleTable.objects[hObject].dwType != HNDL_NONE) ||
       dwType == objHandleTable.objects[hObject].dwType))
    {
        objHandleTable.objects[hObject].dwGDI32Data = dwGDI32Data;
        fSuccess = TRUE;
    }
    objTableMutex.leave();
    return fSuccess;
}
//******************************************************************************
//******************************************************************************
DWORD WIN32API ObjQueryHandleFlags(OBJHANDLE hObject)
{
    DWORD dwFlags = 0;

    objTableMutex.enter();
    hObject &= OBJHANDLE_MAGIC_MASK;
    if(hObject < MAX_OBJECT_HANDLES && objHandleTable.objects[hObject].dwType != HNDL_NONE)
    {
        dwFlags = objHandleTable.objects[hObject].dwFlags;
    }
    objTableMutex.leave();
    return dwFlags;
}
//******************************************************************************
//******************************************************************************
BOOL WIN32API ObjSetHandleFlag(HANDLE hObject, DWORD dwFlag, BOOL fSet)
{
    BOOL fSuccess = FALSE;

    objTableMutex.enter();
    hObject &= OBJHANDLE_MAGIC_MASK;
    if(hObject < MAX_OBJECT_HANDLES && objHandleTable.objects[hObject].dwType != HNDL_NONE) {
        if(fSet) {
             objHandleTable.objects[hObject].dwFlags |= dwFlag;
        }
        else objHandleTable.objects[hObject].dwFlags &= ~dwFlag;

        dprintf(("ObjSetHandleFlag %x -> %x", MAKE_HANDLE(hObject), dwFlag));

        fSuccess = TRUE;
    }
    objTableMutex.leave();
    return fSuccess;
}
//******************************************************************************
//******************************************************************************
DWORD WIN32API ObjQueryHandleType(HANDLE hObject)
{
//hack alert
    if(HIWORD(hObject) == 0x100)
    {//most likely a DC handle
        if(OSLibGpiQueryDCData(hObject) != NULL) {
            return HNDL_DC;
        }
    }
//end hack

    DWORD objtype = 0;

    objTableMutex.enter();
    hObject &= OBJHANDLE_MAGIC_MASK;
    if(hObject < MAX_OBJECT_HANDLES && objHandleTable.objects[hObject].dwType != HNDL_NONE) {
        objtype = objHandleTable.objects[hObject].dwType;
    }
    objTableMutex.leave();
    return objtype;
}
//******************************************************************************
//******************************************************************************
#ifdef DEBUG
void dumpObjectType(const char *szType, DWORD dwType)
{
    for(int i=0;i<MAX_OBJECT_HANDLES;i++) {
        if(objHandleTable.objects[i].dwUserData != 0 && objHandleTable.objects[i].dwType == dwType) {
            dprintf(("%s object %x %x %x %x time %x", szType, MAKE_HANDLE(i), objHandleTable.objects[i].dwUserData, objHandleTable.objects[i].dwGDI32Data, objHandleTable.objects[i].dwFlags, objHandleTable.objects[i].dwTime));
        }
    }
}
//******************************************************************************
//******************************************************************************
void WIN32API ObjDumpObjects()
{
    dprintf(("Open object handles (%d, max %d): (time %x)", objHandleTable.iAllocated, objHandleTable.dwMaxAllocated, GetCurrentTime()));

    dumpObjectType("HNDL_PEN", HNDL_PEN);
    dumpObjectType("HNDL_BRUSH", HNDL_BRUSH);
    dumpObjectType("HNDL_DC", HNDL_DC);
    dumpObjectType("HNDL_METADC", HNDL_METADC);
    dumpObjectType("HNDL_PALETTE", HNDL_PALETTE);
    dumpObjectType("HNDL_FONT", HNDL_FONT);
    dumpObjectType("HNDL_BITMAP", HNDL_BITMAP);
    dumpObjectType("HNDL_DIBSECTION", HNDL_DIBSECTION);
    dumpObjectType("HNDL_REGION", HNDL_REGION);
    dumpObjectType("HNDL_METAFILE", HNDL_METAFILE);
    dumpObjectType("HNDL_ENHMETAFILE", HNDL_ENHMETAFILE);
    dumpObjectType("HNDL_MEMDC", HNDL_MEMDC);
    dumpObjectType("HNDL_EXTPEN", HNDL_EXTPEN);
    dumpObjectType("HNDL_ENHMETADC", HNDL_ENHMETADC);
    dumpObjectType("HNDL_MENU", HNDL_MENU);
    dumpObjectType("HNDL_ACCEL", HNDL_ACCEL);
    dumpObjectType("HNDL_CURSORICON", HNDL_CURSORICON);
    dumpObjectType("HNDL_DDELP", HNDL_DDELP);
}
#endif
//******************************************************************************
//******************************************************************************
int WIN32API GetObjectA( HGDIOBJ hObject, int size, void *lpBuffer)
{
    int rc;

    if(lpBuffer == NULL)
    { //return required size if buffer pointer == NULL
        int objtype = GetObjectType(hObject);
        switch(objtype)
        {
        case OBJ_PEN:
            return sizeof(LOGPEN);

        case OBJ_EXTPEN:
            return sizeof(EXTLOGPEN);

        case OBJ_BRUSH:
            return sizeof(LOGBRUSH);

        case OBJ_PAL:
            return sizeof(USHORT);

        case OBJ_FONT:
            return sizeof(LOGFONTA);

        case OBJ_BITMAP:
            return sizeof(BITMAP); //also default for dib sections??? (TODO: NEED TO CHECK THIS)

        case OBJ_DC:
        case OBJ_METADC:
        case OBJ_REGION:
        case OBJ_METAFILE:
        case OBJ_MEMDC:
        case OBJ_ENHMETADC:
        case OBJ_ENHMETAFILE:
            dprintf(("warning: GetObjectA not defined for object type %d", objtype));
            return 0;
        }
    }
    if(DIBSection::getSection() != NULL)
    {
        DIBSection *dsect = DIBSection::findObj(hObject);
        if(dsect)
        {
            rc = dsect->GetDIBSection(size, lpBuffer);
            if(rc == 0) {
                SetLastError(ERROR_INVALID_PARAMETER);
                return 0;
            }
            SetLastError(ERROR_SUCCESS);
            return rc;
        }
    }

    return O32_GetObject(hObject, size, lpBuffer);
}
//******************************************************************************
//******************************************************************************
int WIN32API GetObjectW( HGDIOBJ hObject, int size, void *lpBuffer)
{
    int ret, objtype;

    objtype = GetObjectType(hObject);

    switch(objtype)
    {
    case OBJ_FONT:
    {
        LOGFONTA logfonta;

        if(lpBuffer == NULL) {
            return sizeof(LOGFONTW); //return required size if buffer pointer == NULL
        }
        ret = GetObjectA(hObject, sizeof(logfonta), (void *)&logfonta);
        if(ret == sizeof(logfonta))
        {
            LOGFONTW *logfontw = (LOGFONTW *)lpBuffer;

            if(size < sizeof(LOGFONTW)) {
                dprintf(("GDI32: GetObjectW : buffer not big enough for LOGFONTW struct!!")); //is the correct? or copy only part?
                return 0;
            }
            memcpy(logfontw, &logfonta, sizeof(LOGFONTA));
            memset(logfontw->lfFaceName, 0, LF_FACESIZE);
            AsciiToUnicodeN(logfonta.lfFaceName, logfontw->lfFaceName, LF_FACESIZE-1);

            return sizeof(LOGFONTW);
        }
        return 0;
    }
    default:
        return GetObjectA(hObject, size, lpBuffer);
    }
}
//******************************************************************************
//******************************************************************************
#ifdef DEBUG
static const char *gditypenames[] = {
"NULL",
"OBJ_PEN",
"OBJ_BRUSH",
"OBJ_DC",
"OBJ_METADC",
"OBJ_PAL",
"OBJ_FONT",
"OBJ_BITMAP",
"OBJ_REGION",
"OBJ_METAFILE",
"OBJ_MEMDC",
"OBJ_EXTPEN",
"OBJ_ENHMETADC",
"OBJ_ENHMETAFILE"
};

const char *DbgGetGDITypeName(DWORD handleType)
{
    if(handleType <= OBJ_ENHMETAFILE) {
        return gditypenames[handleType];
    }
    return "UNKNOWN TYPE";
}
#endif
//******************************************************************************
//******************************************************************************
HGDIOBJ WIN32API SelectObject(HDC hdc, HGDIOBJ hObj)
{
    HGDIOBJ rc;
    DWORD   handleType;

    //TODO: must use 16 bits gdi object handles
    if(HIWORD(hObj) == 0) {
        hObj |= GDIOBJ_PREFIX;
    }

    handleType = GetObjectType(hObj);
    dprintf(("GDI32: SelectObject %x %x type %s", hdc, hObj, DbgGetGDITypeName(handleType)));
    if(handleType == OBJ_REGION) {
        //Return complexity here; not previously selected clip region
        return (HGDIOBJ)SelectClipRgn(hdc, hObj);
    }

    if(handleType == OBJ_BITMAP && DIBSection::getSection() != NULL)
    {
        DIBSection *dsect;

        dsect = DIBSection::findHDC(hdc);
        if(dsect)
        {
            //remove previously selected dibsection
            dsect->UnSelectDIBObject();
        }
        dsect = DIBSection::findObj(hObj);
        if(dsect)
        {
            dsect->SelectDIBObject(hdc);
        }
    }
    rc = O32_SelectObject(hdc, hObj);
    if(rc != 0 && GetObjectType(rc) == OBJ_BITMAP && DIBSection::getSection != NULL)
    {
        DIBSection *dsect = DIBSection::findObj(rc);
        if(dsect)
        {
            dsect->UnSelectDIBObject();
        }
    }
    return(rc);
}
//******************************************************************************
//Called from user32 ReleaseDC (for non CS_OWNDC hdcs)
//******************************************************************************
VOID WIN32API UnselectGDIObjects(HDC hdc)
{
    DIBSection *dsect;

    dsect = DIBSection::findHDC(hdc);
    if(dsect)
    {
        //remove previously selected dibsection
        dsect->UnSelectDIBObject();
    }
}
//******************************************************************************
//******************************************************************************
DWORD WIN32API GetObjectType( HGDIOBJ hObj)
{
    DWORD objtype = ObjQueryHandleType(hObj);

    switch(objtype) {
    case HNDL_PEN:
        objtype = OBJ_PEN;
        break;
    case HNDL_BRUSH:
        objtype = OBJ_BRUSH;
        break;
    case HNDL_DC:
        objtype = OBJ_DC;
        break;
    case HNDL_METADC:
        objtype = OBJ_METADC;
        break;
    case HNDL_PALETTE:
        objtype = OBJ_PAL;
        break;
    case HNDL_FONT:
        objtype = OBJ_FONT;
        break;
    case HNDL_BITMAP:
    case HNDL_DIBSECTION:
        objtype = OBJ_BITMAP;
        break;
    case HNDL_REGION:
        objtype = OBJ_REGION;
        break;
    case HNDL_METAFILE:
        objtype = OBJ_METAFILE;
        break;
    case HNDL_ENHMETAFILE:
        objtype = OBJ_ENHMETAFILE;
        break;
    case HNDL_MEMDC:
        objtype = OBJ_MEMDC;
        break;
    case HNDL_EXTPEN:
        objtype = OBJ_EXTPEN;
        break;
    case HNDL_ENHMETADC:
        objtype = OBJ_ENHMETADC;
        break;
    default:
        objtype = 0;
        break;
    }
    dprintf2(("GDI32: GetObjectType %x objtype %d (%s)", hObj, objtype, DbgGetGDITypeName(objtype)));
    return objtype;
}
//******************************************************************************
//TODO: System objects can't be deleted (TODO: any others?? (fonts?))!!!!)
//******************************************************************************
BOOL WIN32API DeleteObject(HANDLE hObj)
{
    DWORD objflags;

//hack alert
    if(HIWORD(hObj) == 0x100)
    {//most likely a DC handle
        if(OSLibGpiQueryDCData(hObj) != NULL) {
            dprintf(("WARNING: DeleteObject used for DC handle!"));
            return DeleteDC(hObj);
        }
    }
//end hack

    objflags = ObjQueryHandleFlags(hObj);
    if(objflags & OBJHANDLE_FLAG_NODELETE) {
        dprintf(("!WARNING!: Can't delete system object"));
        return TRUE;
    }
    STATS_DeleteObject(hObj, GetObjectType(hObj));

    if(ObjQueryHandleType(hObj) == HNDL_REGION)
    {
        OSLibDeleteRegion(ObjQueryHandleData(hObj, HNDL_REGION));
        ObjDeleteHandle(hObj, HNDL_REGION);
        SetLastError(ERROR_SUCCESS);
        return TRUE;
    }

    DIBSection::deleteSection((DWORD)hObj);
    return O32_DeleteObject(hObj);
}
//******************************************************************************
//******************************************************************************
int WIN32API EnumObjects( HDC hdc, int objType, GOBJENUMPROC objFunc, LPARAM lParam)
{
    //calling convention differences
    dprintf(("!ERROR!: GDI32: EnumObjects STUB"));
//    return O32_EnumObjects(arg1, arg2, arg3, arg4);
    return 0;
}
//******************************************************************************
//******************************************************************************
HANDLE WIN32API GetCurrentObject( HDC hdc, UINT arg2)
{
    return (HANDLE)O32_GetCurrentObject(hdc, arg2);
}
//******************************************************************************
//******************************************************************************
BOOL WIN32API SetObjectOwner( HGDIOBJ arg1, int arg2 )
{
    // Here is a guess for a undocumented entry
    dprintf(("WARNING: GDI32: SetObjectOwner - stub (TRUE)\n"));
    return TRUE;
}
//******************************************************************************
//******************************************************************************
BOOL WIN32API UnrealizeObject( HGDIOBJ hObject)
{
    return O32_UnrealizeObject(hObject);
}
//******************************************************************************
//******************************************************************************