/*
* OleStdCopyTargetDevice()
*
* Purpose:
* duplicate a TARGETDEVICE struct. this function allocates memory for
* the copy. the caller MUST free the allocated copy when done with it
* using the standard allocator returned from CoGetMalloc.
* (OleStdFree can be used to free the copy).
*
* Parameters:
* ptdSrc pointer to source TARGETDEVICE
*
* Return Value:
* pointer to allocated copy of ptdSrc
* if ptdSrc==NULL then retuns NULL is returned.
* if ptdSrc!=NULL and memory allocation fails, then NULL is returned
*/
STDAPI_(DVTARGETDEVICE FAR*) OleStdCopyTargetDevice(DVTARGETDEVICE FAR* ptdSrc)
{
DVTARGETDEVICE FAR* ptdDest;
if (ptdSrc == NULL) {
return NULL;
}
ptdDest = (DVTARGETDEVICE FAR*)OleStdMalloc(ptdSrc->tdSize);
if (ptdDest != NULL)
memcpy(ptdDest, ptdSrc, (size_t)ptdSrc->tdSize);
return ptdDest;
}
static void WINAPI Abbreviate(HDC hdc, int nWidth, LPTSTR lpch, int nMaxChars)
{
/* string is too long to fit; chop it */
/* set up new prefix & determine remaining space in control */
LPTSTR lpszFileName = NULL;
LPTSTR lpszCur = CharNext(CharNext(lpch));
lpszCur = FindChar(lpszCur, TEXT('\\'));
// algorithm will insert \... so allocate extra 4
LPTSTR lpszNew = (LPTSTR)OleStdMalloc((lstrlen(lpch)+5) * sizeof(TCHAR));
if (lpszNew == NULL)
return;
if (lpszCur != NULL) // at least one backslash
{
*lpszNew = (TCHAR)0;
*lpszCur = (TCHAR)0;
lstrcpy(lpszNew, lpch);
*lpszCur = TEXT('\\');
// lpszNew now contains c: or \\servername
lstrcat(lpszNew, TEXT("\\..."));
// lpszNew now contains c:\... or \\servername\...
LPTSTR lpszEnd = lpszNew;
while (*lpszEnd != (TCHAR)0)
lpszEnd = CharNext(lpszEnd);
// lpszEnd is now at the end of c:\... or \\servername\...
// move down directories until it fits or no more directories
while (lpszCur != NULL)
{
*lpszEnd = (TCHAR)0;
lstrcat(lpszEnd, lpszCur);
if (GetTextWSize(hdc, lpszNew) <= nWidth &&
lstrlen(lpszNew) < nMaxChars)
{
lstrcpyn(lpch, lpszNew, nMaxChars);
OleStdFree(lpszNew);
return;
}
lpszCur = CharNext(lpszCur); // advance past backslash
lpszCur = FindChar(lpszCur, TEXT('\\'));
}
// try just ...filename and then shortening filename
lpszFileName = FindReverseChar(lpch, TEXT('\\'));
}
else
lpszFileName = lpch;
while (*lpszFileName != (TCHAR)0)
{
lstrcpy(lpszNew, TEXT("..."));
lstrcat(lpszNew, lpszFileName);
if (GetTextWSize(hdc, lpszNew) <= nWidth && lstrlen(lpszNew) < nMaxChars)
{
lstrcpyn(lpch, lpszNew, nMaxChars);
OleStdFree(lpszNew);
return;
}
lpszFileName = CharNext(lpszFileName);
}
OleStdFree(lpszNew);
// not even a single character fit
*lpch = (TCHAR)0;
}