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[USER32] Implement UserLpkPSMTextOut(). (#890)
This function is a condensed version of LpkPSMTextOut() (from lpk.dll), but not bug-for-bug equivalent. The main difference is that the underscore is drawn without taking into account any kind of script processing.
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commit
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3 changed files with 113 additions and 9 deletions
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@ -546,14 +546,6 @@ RecordShutdownReason(DWORD dw0)
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return FALSE;
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}
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BOOL
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WINAPI
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UserLpkPSMTextOut(DWORD dw1, DWORD dw2, DWORD dw3, DWORD dw4, DWORD dw5, DWORD dw6)
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{
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UNIMPLEMENTED;
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return FALSE;
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}
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BOOL
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WINAPI
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UserLpkTabbedTextOut(
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@ -719,7 +719,7 @@
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710 stdcall User32InitializeImmEntryTable(ptr)
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711 stdcall UserClientDllInitialize(long long ptr) DllMain
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712 stdcall UserHandleGrantAccess(ptr ptr long) NtUserUserHandleGrantAccess
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713 stdcall UserLpkPSMTextOut(long long long long long long)
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713 stdcall UserLpkPSMTextOut(long long long wstr long long)
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714 stdcall UserLpkTabbedTextOut(long long long long long long long long long long long long)
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715 stdcall UserRealizePalette(long)
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716 stdcall UserRegisterWowHandlers(ptr ptr)
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@ -383,3 +383,115 @@ INT WINAPI DrawTextA( HDC hdc, LPCSTR str, INT count, LPRECT rect, UINT flags )
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}
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return DrawTextExA( hdc, (LPSTR)str, count, rect, flags, &dtp );
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}
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/***************************************************************************
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* UserLpkPSMTextOut
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*
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* Stripped down version of DrawText, can only draw single line text and
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* Prefix underscore (only on the last found amperstand)
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* only flags to be found to be of use in testing:
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*
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* DT_NOPREFIX - Draw the string as is it without any changes
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* DT_HIDEPREFIX - Draw the string without underscore
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* DT_PREFIXONLY - Draw only the underscore
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*
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* without any of these flags the behavior is the string being drawn without the amperstands and
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* with the underscore.
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*
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* lpk has an equivalent function - LpkPSMTextOut
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* Notes by testing:
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* This function in windows doesn't check if lpString is NULL, which results a crash,
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* returns seemingly random values without any logic, and ignores the DT_NOPREFIX value.
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* All of these issues don't exist in the LPK version.
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*
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* Note: lpString does not need to be null terminated
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*/
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#define PREFIX 38
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#define ALPHA_PREFIX 30 /* Win16: Alphabet prefix */
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#define KANA_PREFIX 31 /* Win16: Katakana prefix */
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INT WINAPI UserLpkPSMTextOut(HDC hdc, int x, int y, LPCWSTR lpString, int cString, DWORD dwFlags)
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{
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SIZE size;
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TEXTMETRICW tm;
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int len, i = 0, j = 0;;
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int prefix_count = 0, prefix_offset = -1;
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LPWSTR display_str = NULL;
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int prefix_x, prefix_end;
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HPEN hpen;
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HPEN oldPen;
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if (!lpString || cString <= 0)
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return 0;
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if (dwFlags & DT_NOPREFIX) /* Windows ignores this */
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{
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ExtTextOutW(hdc, x, y, (dwFlags & DT_RTLREADING) ? ETO_RTLREADING : 0, NULL, lpString, cString, NULL);
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GetTextExtentPointW(hdc, lpString, cString, &size);
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return size.cx;
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}
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display_str = HeapAlloc(GetProcessHeap(), 0, (cString + 1) * sizeof(WCHAR));
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if (!display_str)
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return 0;
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while (i < cString)
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{
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if (lpString[i] == PREFIX || (iswspace(lpString[i]) && lpString[i] != L' '))
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{
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if (i < cString - 1 && lpString[i + 1] == PREFIX)
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display_str[j++] = lpString[i++];
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else
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i++;
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}
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else
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{
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display_str[j++] = lpString[i++];
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}
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}
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display_str[j] = L'\0';
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len = wcslen(display_str);
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if (!(dwFlags & DT_PREFIXONLY))
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ExtTextOutW(hdc, x, y, (dwFlags & DT_RTLREADING) ? ETO_RTLREADING : 0, NULL, display_str, len, NULL);
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if (!(dwFlags & DT_HIDEPREFIX))
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{
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for (i = 0; i < cString - 1; i++)
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{
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if (lpString[i] == PREFIX && lpString[i + 1] != PREFIX)
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{
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prefix_offset = i - prefix_count;
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prefix_count++;
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}
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else if (lpString[i] == PREFIX && lpString[i + 1] == PREFIX)
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{
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i++;
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}
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}
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GetTextMetricsW(hdc, &tm);
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if (prefix_offset != -1)
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{
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GetTextExtentPointW(hdc, display_str, prefix_offset, &size);
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prefix_x = x + size.cx;
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GetTextExtentPointW(hdc, display_str, prefix_offset + 1, &size);
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prefix_end = x + size.cx - 1;
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hpen = CreatePen(PS_SOLID, 1, GetTextColor(hdc));
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oldPen = SelectObject(hdc, hpen);
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MoveToEx(hdc, prefix_x, y + tm.tmAscent + 1, NULL);
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LineTo(hdc, prefix_end, y + tm.tmAscent + 1);
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SelectObject(hdc, oldPen);
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DeleteObject(hpen);
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}
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}
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GetTextExtentPointW(hdc, display_str, len + 1, &size);
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HeapFree(GetProcessHeap(), 0, display_str);
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return size.cx;
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}
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