C++ UT_String::clear方法代码示例

static void getDefaultApp(UT_String &imageApp, bool &bLeaveImageAsPNG)
{
#ifdef WIN32
	bLeaveImageAsPNG = false;
	imageApp.clear();

	char buffer[MAX_PATH];
	// for WinNT mspaint is most likely in the system directory (eg C:\WINNT\SYSTEM32\MSPAINT.EXE)
	if (GetSystemDirectory(buffer, MAX_PATH))
	{
		imageApp = buffer;
		imageApp += "\\MSPAINT.EXE";
		UT_DEBUGMSG(("ABIPAINT: Checking if %s exists\n", imageApp.c_str()));
		if (!UT_isRegularFile(imageApp.c_str()))
			imageApp.clear();
	}
	// if not there, try in Win95b directory (eg %PROGRAMFILES%\ACCESSORIES\MSPAINT.EXE)
	if (imageApp.empty())
	{
		HKEY hKey;
		unsigned long lType;	
		DWORD dwSize;
		unsigned char* szValue = NULL;
		if( ::RegOpenKeyEx( HKEY_LOCAL_MACHINE, "Software\\Microsoft\\Windows\\CurrentVersion", 0, KEY_READ, &hKey) == ERROR_SUCCESS )
		{
			if( ::RegQueryValueEx( hKey, "ProgramFilesDir", NULL, &lType, NULL, &dwSize) == ERROR_SUCCESS )
			{
				szValue = new unsigned char[dwSize + 1];
				::RegQueryValueEx( hKey, "ProgramFilesDir", NULL, &lType, szValue, &dwSize);
				imageApp = (char*) szValue;
				delete[] szValue;
				imageApp += "\\ACCESSORIES\\MSPAINT.EXE";
				UT_DEBUGMSG(("ABIPAINT: Checking if %s exists\n", imageApp.c_str()));
				if (!UT_isRegularFile(imageApp.c_str()))
					imageApp.clear();
			}
			::RegCloseKey(hKey);
		}
	}
	// if we still haven't found the file, then simply try mspaint.exe
	if (imageApp.empty())
	{
		imageApp = "mspaint.exe";
		UT_DEBUGMSG(("ABIPAINT: Falling back to %s (will probably fail)\n", imageApp.c_str()));
	}
#else
	// for other platforms default to the GIMP, assume in path
	bLeaveImageAsPNG = true;
	imageApp = "gimp";
#endif
}

void XAP_Dialog_FontChooser::setFontDecoration(bool bUnderline, bool bOverline, bool bStrikeOut, bool bTopline, bool bBottomline)
{
	m_bUnderline = bUnderline;
	m_bOverline = bOverline;
	m_bStrikeout = bStrikeOut;
	m_bTopline = bTopline;
	m_bBottomline = bBottomline;

	static gchar s[50];
	UT_String decors;
	decors.clear();
	if(bUnderline)
		decors += "underline ";
	if(bStrikeOut)
		decors += "line-through ";
	if(bOverline)
		decors += "overline ";
	if(bTopline)
		decors += "topline ";
	if(bBottomline)
		decors += "bottomline ";
	if(!bUnderline && !bStrikeOut && !bOverline && !bTopline && !bBottomline)
		decors = "none";
	sprintf(s,"%s",decors.c_str());
	addOrReplaceVecProp("text-decoration",(const gchar *) s);
}

/*!
 * Assuming a string of standard abiword properties eg. "fred:nerk; table-width:1.0in; table-height:10.in"
 * Remove the property sProp and it's value from the string of properties. 
 */
void UT_String_removeProperty(UT_String & sPropertyString, const UT_String & sProp)
{
	UT_String sWork ( sProp );
	sWork += ":";
	const char * szWork = sWork.c_str();
	const char * szProps = sPropertyString.c_str();
	const char * szLoc = strstr(szProps,szWork);
	if(szLoc == NULL)
	{
//
// Not here, do nothing
		return ;
	}
//
// Found it, Get left part.
//
	UT_sint32 locLeft = static_cast<UT_sint32>(reinterpret_cast<size_t>(szLoc) - reinterpret_cast<size_t>(szProps));
	UT_String sLeft;
	if(locLeft == 0)
	{
		sLeft.clear();
	}
	else
	{
		sLeft = sPropertyString.substr(0,locLeft);
	}
	locLeft = static_cast<UT_sint32>(sLeft.size());
	if(locLeft > 0)
	{
//
// If this element is the last item in the properties there is no "; ".
//
// Remove trailing ';' and ' '
//
		locLeft--;
		while(locLeft >= 0 && (sLeft[locLeft] == ';' || sLeft[locLeft] == ' '))
		{
			locLeft--;
		}
	}
	UT_String sNew;
	if(locLeft > 0)
	{
		sNew = sLeft.substr(0,locLeft+1);
	}
	else
	{
		sNew.clear();
	}
//
// Look for ";" to get right part
//
	const char * szDelim = strchr(szLoc,';');
	if(szDelim == NULL)
	{
//
// No properties after this, just assign and return
//
		sPropertyString = sNew;
	}
	else
	{
//
// Just slice off the properties and tack them onto the pre-existing sNew
//
		while(*szDelim == ';' || *szDelim == ' ')
		{
			szDelim++;
		}
		UT_sint32 offset = static_cast<UT_sint32>(reinterpret_cast<size_t>(szDelim) - reinterpret_cast<size_t>(szProps));
		UT_sint32 iLen = sPropertyString.size() - offset;
		if(sNew.size() > 0)
		{
			sNew += "; ";
		}
		sNew += sPropertyString.substr(offset,iLen);
		sPropertyString = sNew;
	}
}