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user32: Add a thunking mechanism for 16-bit edit word break procedures.

This commit is contained in:
Alexandre Julliard 2009-12-11 14:52:28 +01:00
parent 8b50188f57
commit dcec342b50
1 changed files with 88 additions and 34 deletions
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122
dlls/user32/edit.c
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@ -131,7 +131,6 @@ typedef struct
and just line width for single line controls */
INT region_posx; /* Position of cursor relative to region: */
INT region_posy; /* -1: to left, 0: within, 1: to right */
EDITWORDBREAKPROC16 word_break_proc16;
void *word_break_proc; /* 32-bit word break proc: ANSI or Unicode */
INT line_count; /* number of lines */
INT y_offset; /* scroll offset in number of lines */
@ -252,6 +251,90 @@ static HBRUSH EDIT_NotifyCtlColor(EDITSTATE *es, HDC hdc)
}
/**********************************************************************
* Support for word break proc thunks
*/
#define MAX_THUNKS 32
#include <pshpack1.h>
static struct word_break_thunk
{
BYTE popl_eax; /* popl %eax (return address) */
BYTE pushl_proc16; /* pushl proc16 */
EDITWORDBREAKPROC16 proc16;
BYTE pushl_eax; /* pushl %eax */
BYTE jmp; /* ljmp call_word_break_proc16 */
DWORD callback;
} *word_break_thunks;
#include <poppack.h>
/**********************************************************************
* call_word_break_proc16
*/
static INT16 CALLBACK call_word_break_proc16( SEGPTR proc16, LPSTR text, INT index, INT count, INT action )
{
SEGPTR segptr;
WORD args[5];
DWORD result;
segptr = MapLS( text );
args[4] = SELECTOROF(segptr);
args[3] = OFFSETOF(segptr);
args[2] = index;
args[1] = count;
args[0] = action;
WOWCallback16Ex( proc16, WCB16_PASCAL, sizeof(args), args, &result );
UnMapLS( segptr );
return LOWORD(result);
}
/******************************************************************
* add_word_break_thunk
*/
static struct word_break_thunk *add_word_break_thunk( EDITWORDBREAKPROC16 proc16 )
{
struct word_break_thunk *thunk;
if (!word_break_thunks)
{
word_break_thunks = VirtualAlloc( NULL, MAX_THUNKS * sizeof(*thunk),
MEM_COMMIT, PAGE_EXECUTE_READWRITE );
if (!word_break_thunks) return NULL;
for (thunk = word_break_thunks; thunk < &word_break_thunks[MAX_THUNKS]; thunk++)
{
thunk->popl_eax = 0x58; /* popl %eax */
thunk->pushl_proc16 = 0x68; /* pushl proc16 */
thunk->pushl_eax = 0x50; /* pushl %eax */
thunk->jmp = 0xe9; /* jmp call_word_break_proc16 */
thunk->callback = (char *)call_word_break_proc16 - (char *)(&thunk->callback + 1);
}
}
for (thunk = word_break_thunks; thunk < &word_break_thunks[MAX_THUNKS]; thunk++)
if (thunk->proc16 == proc16) return thunk;
for (thunk = word_break_thunks; thunk < &word_break_thunks[MAX_THUNKS]; thunk++)
{
if (thunk->proc16) continue;
thunk->proc16 = proc16;
return thunk;
}
FIXME("Out of word break thunks\n");
return NULL;
}
/******************************************************************
* get_word_break_thunk
*/
static EDITWORDBREAKPROC16 get_word_break_thunk( EDITWORDBREAKPROCA proc )
{
struct word_break_thunk *thunk = (struct word_break_thunk *)proc;
if (word_break_thunks && thunk >= word_break_thunks && thunk < &word_break_thunks[MAX_THUNKS])
return thunk->proc16;
return NULL;
}
/*********************************************************************
*
* EDIT_WordBreakProc
@ -336,28 +419,7 @@ static INT EDIT_CallWordBreakProc(EDITSTATE *es, INT start, INT index, INT count
{
INT ret;
if (es->word_break_proc16) {
HGLOBAL16 hglob16;
SEGPTR segptr;
INT countA;
WORD args[5];
DWORD result;
countA = WideCharToMultiByte(CP_ACP, 0, es->text + start, count, NULL, 0, NULL, NULL);
hglob16 = GlobalAlloc16(GMEM_MOVEABLE | GMEM_ZEROINIT, countA);
segptr = WOWGlobalLock16(hglob16);
WideCharToMultiByte(CP_ACP, 0, es->text + start, count, MapSL(segptr), countA, NULL, NULL);
args[4] = SELECTOROF(segptr);
args[3] = OFFSETOF(segptr);
args[2] = index;
args[1] = countA;
args[0] = action;
WOWCallback16Ex((DWORD)es->word_break_proc16, WCB16_PASCAL, sizeof(args), args, &result);
ret = LOWORD(result);
GlobalUnlock16(hglob16);
GlobalFree16(hglob16);
}
else if (es->word_break_proc)
if (es->word_break_proc)
{
if(es->is_unicode)
{
@ -3091,7 +3153,6 @@ static void EDIT_EM_SetWordBreakProc(EDITSTATE *es, void *wbp)
return;
es->word_break_proc = wbp;
es->word_break_proc16 = NULL;
if ((es->style & ES_MULTILINE) && !(es->style & ES_AUTOHSCROLL)) {
EDIT_BuildLineDefs_ML(es, 0, get_text_length(es), 0, NULL);
@ -3107,15 +3168,8 @@ static void EDIT_EM_SetWordBreakProc(EDITSTATE *es, void *wbp)
*/
static void EDIT_EM_SetWordBreakProc16(EDITSTATE *es, EDITWORDBREAKPROC16 wbp)
{
if (es->word_break_proc16 == wbp)
return;
es->word_break_proc = NULL;
es->word_break_proc16 = wbp;
if ((es->style & ES_MULTILINE) && !(es->style & ES_AUTOHSCROLL)) {
EDIT_BuildLineDefs_ML(es, 0, get_text_length(es), 0, NULL);
EDIT_UpdateText(es, NULL, TRUE);
}
struct word_break_thunk *thunk = add_word_break_thunk( wbp );
if (thunk) EDIT_EM_SetWordBreakProc( es, thunk );
}
@ -5048,7 +5102,7 @@ static LRESULT EditWndProc_common( HWND hwnd, UINT msg,
break;
case EM_GETWORDBREAKPROC16:
result = (LRESULT)es->word_break_proc16;
result = (LRESULT)get_word_break_thunk( es->word_break_proc );
break;
case EM_GETWORDBREAKPROC:
result = (LRESULT)es->word_break_proc;