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goldendict-ng/mouseover_win32/TextOutHook.c

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/*
* February 2, 2009: Konstantin Isakov <ikm@goldendict.org>
* Support for ETO_GLYPH_INDEX in ExtTextOutW() function added. This makes
* Firefox 3 work.
*/
#define _WIN32_WINNT 0x0500
#include "TextOutHook.h"
#include "GetWord.h"
#include "HookImportFunction.h"
HANDLE hHookMutex = 0;
typedef BOOL (WINAPI *TextOutANextHook_t)(HDC hdc, int nXStart, int nYStart, LPCSTR lpszString,int cbString);
TextOutANextHook_t TextOutANextHook = NULL;
typedef BOOL (WINAPI *TextOutWNextHook_t)(HDC hdc, int nXStart, int nYStart, LPCWSTR lpszString,int cbString);
TextOutWNextHook_t TextOutWNextHook = NULL;
typedef BOOL (WINAPI *ExtTextOutANextHook_t)(HDC hdc, int nXStart, int nYStart, UINT fuOptions, CONST RECT *lprc, LPCSTR lpszString, UINT cbString, CONST INT *lpDx);
ExtTextOutANextHook_t ExtTextOutANextHook = NULL;
typedef BOOL (WINAPI *ExtTextOutWNextHook_t)(HDC hdc, int nXStart, int nYStart, UINT fuOptions, CONST RECT *lprc, LPCWSTR lpszString, UINT cbString, CONST INT *lpDx);
ExtTextOutWNextHook_t ExtTextOutWNextHook = NULL;
TEverythingParams *CurParams = NULL;
void ConvertToMatchedWordA(TEverythingParams *TP)
{
if (TP->WordLen > 0 && TP->WordLen < (int)sizeof(TP->MatchedWordA) && TP->BeginPos >= 0 && TP->BeginPos < (int)sizeof(TP->MatchedWordA)) {
int BeginPos;
int BufSize;
if (!TP->Unicode) {
BeginPos = TP->BeginPos;
if (BeginPos > 0) {
BufSize = sizeof(TP->MatchedWordW)/sizeof(TP->MatchedWordW[0]) - 1;
TP->BeginPos = MultiByteToWideChar(CP_ACP, 0, TP->MatchedWordA, BeginPos, TP->MatchedWordW, BufSize);
if (TP->BeginPos == 0) {
TP->WordLen=0;
TP->MatchedWordA[0] = '\0';
return;
}
}
BufSize = sizeof(TP->MatchedWordW)/sizeof(TP->MatchedWordW[0]) - 1 - TP->BeginPos;
if(BufSize > 0)
TP->WordLen = MultiByteToWideChar(CP_ACP, 0, TP->MatchedWordA + BeginPos, TP->WordLen - BeginPos, TP->MatchedWordW + TP->BeginPos, BufSize);
else TP->WordLen = 0;
if (TP->WordLen == 0) {
TP->WordLen=TP->BeginPos;
TP->MatchedWordA[TP->WordLen] = '\0';
return;
}
TP->WordLen += TP->BeginPos;
if(TP->WordLen >= (int)sizeof(TP->MatchedWordA)) TP->WordLen = sizeof(TP->MatchedWordA) - 1;
}
BeginPos = TP->BeginPos;
if (BeginPos > 0) {
wchar_t temp = TP->MatchedWordW[BeginPos];
TP->MatchedWordW[BeginPos] = 0;
TP->BeginPos = WideCharToMultiByte(CP_UTF8, 0, TP->MatchedWordW, BeginPos + 1, TP->MatchedWordA, sizeof(TP->MatchedWordA) - 1, NULL, NULL);
TP->MatchedWordW[BeginPos] = temp;
TP->BeginPos--;
if (TP->BeginPos<=0) {
TP->WordLen=0;
TP->MatchedWordA[0] = '\0';
return;
} else if (TP->BeginPos >= (int)sizeof(TP->MatchedWordA)-1) {
TP->WordLen=sizeof(TP->MatchedWordA)-1;
TP->MatchedWordA[sizeof(TP->MatchedWordA)-1] = '\0';
return;
}
}
TP->MatchedWordW[TP->WordLen] = 0;
BufSize = sizeof(TP->MatchedWordA) - TP->BeginPos;
if( BufSize > 0)
TP->WordLen = WideCharToMultiByte(CP_UTF8, 0, TP->MatchedWordW + BeginPos, TP->WordLen - BeginPos + 1, TP->MatchedWordA + TP->BeginPos, BufSize, NULL, NULL);
else TP->WordLen = 0;
TP->WordLen--;
if (TP->WordLen<=0) {
TP->WordLen=TP->BeginPos;
TP->MatchedWordA[TP->WordLen] = '\0';
return;
}
TP->WordLen += TP->BeginPos;
if(TP->WordLen >= (int)sizeof(TP->MatchedWordA)) TP->WordLen = sizeof(TP->MatchedWordA) - 1;
TP->MatchedWordA[TP->WordLen] = '\0';
} else {
TP->WordLen = 0;
TP->MatchedWordA[0] = '\0';
}
}
static int MyCopyMemory(char *a, const char *b, int len)
{
int count = 0;
int i;
for (i=0; i<len; i++) {
if (*b != '&') {
count++;
*a = *b;
a++;
}
b++;
}
return count;
}
static void IterateThroughItems(HWND WND, HMENU menu, POINT *p)
{
int count = GetMenuItemCount(menu);
RECT rec;
MENUITEMINFO info;
int i;
for (i=0; i<count; i++) {
if (GetMenuItemRect(WND, menu, i, &rec) && (rec.left<=p->x) && (p->x<=rec.right) && (rec.top<=p->y) && (p->y<=rec.bottom)) {
ZeroMemory(&info, sizeof(info));
info.cbSize = sizeof(info);
info.fMask = MIIM_TYPE | MIIM_SUBMENU;
info.cch = 256;
info.dwTypeData = malloc(256);
if(info.dwTypeData != NULL) {
GetMenuItemInfo(menu, i, TRUE, &info);
if (info.cch>0) {
if (info.cch > 255)
CurParams->WordLen = 255;
else
CurParams->WordLen = info.cch;
CurParams->Unicode = FALSE;
CurParams->WordLen = MyCopyMemory(CurParams->MatchedWordA, info.dwTypeData, CurParams->WordLen);
CurParams->BeginPos = 0;
}
free(info.dwTypeData);
}
break;
}
}
}
static void GetWordTextOutHook (TEverythingParams *TP)
{
DWORD wso;
CurParams = TP;
ScreenToClient(TP->WND, &(TP->Pt));
if (TP->Pt.y<0) {
char buffer[256];
HMENU menu;
char buffer2[256];
GetWindowText(TP->WND, buffer, sizeof(buffer)-1);
SetWindowText(TP->WND, "");
GetWindowText(TP->WND, buffer2, sizeof(buffer2)-1);
if (buffer2[0]) { // MDI window.
char *p = strstr(buffer, buffer2);
if (p) {
if (p == buffer) { // FWS_PREFIXTITLE
strcpy(buffer, buffer+strlen(buffer2));
} else {
*p = '\0';
}
}
}
CurParams->Active = TRUE;
SetWindowText(TP->WND, buffer);
CurParams->Active = FALSE;
menu = GetMenu(TP->WND);
if (menu) {
ClientToScreen(TP->WND, &(TP->Pt));
IterateThroughItems(TP->WND, menu, &(TP->Pt));
}
}
else {
RECT UpdateRect;
GetClientRect(TP->WND, &UpdateRect);
UpdateRect.top = TP->Pt.y;
UpdateRect.bottom = TP->Pt.y + 1;
if(!GetUpdateRect(TP->WND, NULL, FALSE)) {
CurParams->Active = TRUE;
InvalidateRect(TP->WND, &UpdateRect, FALSE);
UpdateWindow(TP->WND);
CurParams->Active = FALSE;
}
}
wso=WaitForSingleObject(hHookMutex, 10000);
CurParams = NULL;
if (wso == WAIT_OBJECT_0 || wso == WAIT_ABANDONED) {
ReleaseMutex(hHookMutex);
}
}
char* ExtractFromEverything(HWND WND, POINT Pt, int *BeginPos)
{
TEverythingParams CParams;
ZeroMemory(&CParams, sizeof(CParams));
CParams.WND = WND;
CParams.Pt = Pt;
GetWordTextOutHook(&CParams);
ConvertToMatchedWordA(&CParams);
*BeginPos = CParams.BeginPos;
if(CParams.WordLen>0) {
return _strdup(CParams.MatchedWordA);
} else {
return(NULL);
}
}
static void IsInsidePointA(const HDC DC, int X, int Y, LPCSTR Str, int Count)
{
SIZE Size;
if ((Count > 0) && GetTextExtentPoint32A(DC, Str, Count, &Size)) {
DWORD Flags = GetTextAlign(DC);
POINT Pt;
RECT Rect;
if (Flags & TA_UPDATECP) {
GetCurrentPositionEx(DC, &Pt);
} else {
Pt.x = X;
Pt.y = Y;
}
if (Flags & TA_CENTER) {
Pt.x-=(Size.cx/2);
} else if (Flags & TA_RIGHT) {
Pt.x-=Size.cx;
}
if (Flags & TA_BASELINE) {
TEXTMETRIC tm;
GetTextMetricsA(DC, &tm);
Pt.y-=tm.tmAscent;
} else if (Flags & TA_BOTTOM) {
Pt.y-=Size.cy;
}
LPtoDP(DC, &Pt, 1);
Rect.left = Pt.x;
Rect.right = Pt.x + Size.cx;
Rect.top = Pt.y;
Rect.bottom = Pt.y + Size.cy;
if (((Rect.left <= Rect.right) && (CurParams->Pt.x >= Rect.left) && (CurParams->Pt.x <= Rect.right)) ||
((Rect.left > Rect.right) && (CurParams->Pt.x <= Rect.left) && (CurParams->Pt.x >= Rect.right))) {
int BegPos;
int Shift = 0;
//if (PtInRect(&Rect, CurParams->Pt)) {
CurParams->Active = !PtInRect(&Rect, CurParams->Pt);
//CurParams->Active = FALSE;
BegPos = (int)((abs((CurParams->Pt.x - Rect.left) / (Rect.right - Rect.left)) * (Count - 1)) + 0.5);
while ((BegPos < Count - 1) && GetTextExtentPoint32A(DC, Str, BegPos + 1, &Size) && (Size.cx < CurParams->Pt.x - Rect.left))
BegPos++;
while ((BegPos >= 0) && GetTextExtentPoint32A(DC, Str, BegPos + 1, &Size) && (Size.cx > CurParams->Pt.x - Rect.left))
BegPos--;
if (BegPos < Count - 1)
BegPos++;
if( Count > 255 ) {
Shift = BegPos - 127;
if( Shift <= 0 )
Shift = 0;
else {
if( Shift > Count - 255 )
Shift = Count - 255;
}
BegPos -= Shift;
Count -= Shift;
if( Count > 255 )
Count = 255;
}
if (BegPos>255) BegPos=255;
CurParams->BeginPos = BegPos;
CurParams->WordLen = Count;
CurParams->Unicode = FALSE;
CopyMemory(CurParams->MatchedWordA, Str + Shift, CurParams->WordLen);
}
}
}
static void IsInsidePointW(const HDC DC, int X, int Y, LPCWSTR Str, int Count)
{
SIZE Size;
if ((Count > 0) && GetTextExtentPoint32W(DC, Str, Count, &Size)) {
DWORD Flags = GetTextAlign(DC);
POINT Pt;
RECT Rect;
if (Flags & TA_UPDATECP) {
GetCurrentPositionEx(DC, &Pt);
} else {
Pt.x = X;
Pt.y = Y;
}
if (Flags & TA_CENTER) {
Pt.x-=(Size.cx/2);
} else if (Flags & TA_RIGHT) {
Pt.x-=Size.cx;
}
if (Flags & TA_BASELINE) {
TEXTMETRICW tm;
GetTextMetricsW(DC, &tm);
Pt.y-=tm.tmAscent;
} else if (Flags & TA_BOTTOM) {
Pt.y-=Size.cy;
}
LPtoDP(DC, &Pt, 1);
Rect.left = Pt.x;
Rect.right = Pt.x + Size.cx;
Rect.top = Pt.y;
Rect.bottom = Pt.y + Size.cy;
// Bug: We don't check Pt.y here, as don't call PtInRect() directly, because
// in Title bar, Start Menu, IE, FireFox, Opera etc., the Rect.top and Rect.bottom will be wrong.
// I try to use GetDCOrgEx(DC, &Pt), but they are not normal HDC that Pt.x and Pt.y will equal to 0 in these cases.
// And use GetWindowRect() then get Rect.left and Rect.top is only useful on Title bar.
if (((Rect.left <= Rect.right) && (CurParams->Pt.x >= Rect.left) && (CurParams->Pt.x <= Rect.right)) ||
((Rect.left > Rect.right) && (CurParams->Pt.x <= Rect.left) && (CurParams->Pt.x >= Rect.right))) {
int BegPos;
int Shift = 0;
//if (PtInRect(&Rect, CurParams->Pt)) {
CurParams->Active = !PtInRect(&Rect, CurParams->Pt);
//CurParams->Active = FALSE;
BegPos = (int)((abs((CurParams->Pt.x - Rect.left) / (Rect.right - Rect.left)) * (Count - 1)) + 0.5);
while ((BegPos < Count - 1) && GetTextExtentPoint32W(DC, Str, BegPos + 1, &Size) && (Size.cx < CurParams->Pt.x - Rect.left))
BegPos++;
while ((BegPos >= 0) && GetTextExtentPoint32W(DC, Str, BegPos + 1, &Size) && (Size.cx > CurParams->Pt.x - Rect.left))
BegPos--;
if (BegPos < Count - 1)
BegPos++;
if( Count > 255 ) {
Shift = BegPos - 127;
if( Shift <= 0 )
Shift = 0;
else {
if( Shift > Count - 255 )
Shift = Count - 255;
}
BegPos -= Shift;
Count -= Shift;
if( Count > 255 )
Count = 255;
}
if (BegPos>255) BegPos=255;
CurParams->BeginPos = BegPos;
CurParams->WordLen = Count;
CurParams->Unicode = TRUE;
CopyMemory(CurParams->MatchedWordW, Str + Shift, CurParams->WordLen * sizeof(wchar_t));
}
}
}
BOOL WINAPI TextOutACallbackProc(HDC hdc, int nXStart, int nYStart, LPCSTR lpszString, int cbString)
{
DWORD wso;
wso = WaitForSingleObject(hHookMutex, 0);
if (wso == WAIT_OBJECT_0 || wso == WAIT_ABANDONED) {
if (CurParams && CurParams->Active)
IsInsidePointA(hdc, nXStart, nYStart, lpszString, cbString);
ReleaseMutex(hHookMutex);
}
return TextOutANextHook(hdc, nXStart, nYStart, lpszString, cbString);
}
BOOL WINAPI TextOutWCallbackProc(HDC hdc, int nXStart, int nYStart, LPCWSTR lpszString, int cbString)
{
DWORD wso;
wso = WaitForSingleObject(hHookMutex, 0);
if (wso == WAIT_OBJECT_0 || wso == WAIT_ABANDONED) {
if (CurParams && CurParams->Active)
IsInsidePointW(hdc, nXStart, nYStart, lpszString, cbString);
ReleaseMutex(hHookMutex);
}
return TextOutWNextHook(hdc, nXStart, nYStart, lpszString, cbString);
}
BOOL WINAPI ExtTextOutACallbackProc(HDC hdc, int nXStart, int nYStart, UINT fuOptions, CONST RECT *lprc, LPCSTR lpszString, UINT cbString, CONST INT *lpDx)
{
DWORD wso;
wso = WaitForSingleObject(hHookMutex, 0);
if (wso == WAIT_OBJECT_0 || wso == WAIT_ABANDONED) {
if (CurParams && CurParams->Active)
IsInsidePointA(hdc, nXStart, nYStart, lpszString, cbString);
ReleaseMutex(hHookMutex);
}
return ExtTextOutANextHook(hdc, nXStart, nYStart, fuOptions, lprc, lpszString, cbString, lpDx);
}
BOOL WINAPI ExtTextOutWCallbackProc(HDC hdc, int nXStart, int nYStart, UINT fuOptions, CONST RECT *lprc, LPCWSTR lpszString, UINT cbString, CONST INT *lpDx)
{
DWORD wso;
wso = WaitForSingleObject(hHookMutex, 0);
if (wso == WAIT_OBJECT_0 || wso == WAIT_ABANDONED) {
if (CurParams && CurParams->Active)
{
if ( fuOptions & ETO_GLYPH_INDEX )
{
LPGLYPHSET ranges = NULL;
WCHAR * allChars, * ptr, * restoredString = NULL;
WORD * allIndices;
unsigned x;
// Here we have to decode glyph indices back to chars. We do this
// by tedious and ineffective iteration.
//
x = GetFontUnicodeRanges( hdc, 0 );
if(x != 0) ranges = malloc(x);
if(ranges == NULL) {
ReleaseMutex(hHookMutex);
return ExtTextOutWNextHook(hdc, nXStart, nYStart, fuOptions, lprc, lpszString, cbString, lpDx);
}
x = GetFontUnicodeRanges( hdc, ranges );
if(x == 0) {
free(ranges);
ReleaseMutex(hHookMutex);
return ExtTextOutWNextHook(hdc, nXStart, nYStart, fuOptions, lprc, lpszString, cbString, lpDx);
}
// Render up all available chars into one ridiculously big string
allChars = malloc( ( ranges->cGlyphsSupported ) * sizeof( WCHAR ) );
allIndices = malloc( ( ranges->cGlyphsSupported ) * sizeof( WORD ) );
if(allChars == NULL || allIndices == NULL) {
if(allChars != NULL) free(allChars);
if(allIndices != NULL) free(allIndices);
ReleaseMutex(hHookMutex);
return ExtTextOutWNextHook(hdc, nXStart, nYStart, fuOptions, lprc, lpszString, cbString, lpDx);
}
ptr = allChars;
for( x = 0; x < ranges->cRanges; ++x )
{
WCHAR c = ranges->ranges[ x ].wcLow;
unsigned y = ranges->ranges[ x ].cGlyphs;
while( y-- )
*ptr++ = c++;
}
// Amazing. Now get glyph indices for this one nice string.
if(GetGlyphIndicesW(hdc, allChars, ranges->cGlyphsSupported, allIndices, GGI_MARK_NONEXISTING_GLYPHS) != GDI_ERROR) {
// Fascinating. Now translate our original input string back into
// its readable form.
restoredString = malloc( cbString * sizeof( WCHAR ) );
if(restoredString != NULL) {
for( x = 0; x < cbString; ++x )
{
unsigned y;
WORD idx = lpszString[ x ];
for( y = 0; y < ranges->cGlyphsSupported; ++y )
if ( allIndices[ y ] == idx )
{
restoredString[ x ] = allChars[ y ];
break;
}
if ( y == ranges->cGlyphsSupported )
{
// Not found
restoredString[ x ] = L'?';
}
}
}
}
// And we're done.
free( allIndices );
free( allChars );
free( ranges );
if(restoredString != NULL) {
IsInsidePointW( hdc, nXStart, nYStart, restoredString, cbString );
free( restoredString );
}
}
else
IsInsidePointW(hdc, nXStart, nYStart, lpszString, cbString);
}
ReleaseMutex(hHookMutex);
}
return ExtTextOutWNextHook(hdc, nXStart, nYStart, fuOptions, lprc, lpszString, cbString, lpDx);
}
static void InstallTextOutHooks()
{
if (TextOutANextHook==NULL)
HookAPI("gdi32.dll", "TextOutA", (PROC)TextOutACallbackProc, (PROC*)&TextOutANextHook);
if (TextOutWNextHook==NULL)
HookAPI("gdi32.dll", "TextOutW", (PROC)TextOutWCallbackProc, (PROC*)&TextOutWNextHook);
if (ExtTextOutANextHook==NULL)
HookAPI("gdi32.dll", "ExtTextOutA", (PROC)ExtTextOutACallbackProc, (PROC*)&ExtTextOutANextHook);
if (ExtTextOutWNextHook==NULL)
HookAPI("gdi32.dll", "ExtTextOutW", (PROC)ExtTextOutWCallbackProc, (PROC*)&ExtTextOutWNextHook);
}
static void UninstallTextOutHooks()
{
if (TextOutANextHook) {
HookAPI("gdi32.dll", "TextOutA", (PROC)TextOutANextHook, NULL);
TextOutANextHook=NULL;
}
if (TextOutWNextHook) {
HookAPI("gdi32.dll", "TextOutW", (PROC)TextOutWNextHook, NULL);
TextOutWNextHook=NULL;
}
if (ExtTextOutANextHook) {
HookAPI("gdi32.dll", "ExtTextOutA", (PROC)ExtTextOutANextHook, NULL);
ExtTextOutANextHook=NULL;
}
if (ExtTextOutWNextHook) {
HookAPI("gdi32.dll", "ExtTextOutW", (PROC)ExtTextOutWNextHook, NULL);
ExtTextOutWNextHook=NULL;
}
}
DLLIMPORT void __gdGetWord (TCurrentMode *P)
{
TCHAR wClassName[64];
TKnownWndClass WndClass;
char *p;
if (GetClassName(P->WND, wClassName, sizeof(wClassName) / sizeof(TCHAR))==0)
wClassName[0] = '\0';
WndClass = GetWindowType(P->WND, wClassName);
p = TryGetWordFromAnyWindow(WndClass, P->WND, P->Pt, &(P->BeginPos));
if (p) {
P->WordLen = strlen(p);
strcpy(P->MatchedWord, p);
free(p);
} else {
P->WordLen = 0;
}
}
BOOL APIENTRY DllMain (HINSTANCE hInst /* Library instance handle. */ ,
DWORD reason /* Reason this function is being called. */ ,
LPVOID reserved /* Not used. */ )
{
DWORD wso;
switch (reason)
{
case DLL_PROCESS_ATTACH:
if(hHookMutex==0) {
hHookMutex = CreateMutex(NULL, FALSE, "GoldenDictTextOutHookMutex");
if(hHookMutex==0)
return(FALSE);
}
InstallTextOutHooks();
break;
case DLL_PROCESS_DETACH:
UninstallTextOutHooks();
if(hHookMutex) {
wso = WaitForSingleObject(hHookMutex, 5000);
if (wso == WAIT_OBJECT_0 || wso == WAIT_ABANDONED) {
ReleaseMutex(hHookMutex);
CloseHandle(hHookMutex);
hHookMutex=0;
}
}
break;
case DLL_THREAD_ATTACH:
break;
case DLL_THREAD_DETACH:
break;
}
/* Returns TRUE on success, FALSE on failure */
return TRUE;
}
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