PDCursesMod/wingui/pdcclip.c

/* Public Domain Curses */

#include "pdcwin.h"

/*man-start**************************************************************

clipboard
---------

### Synopsis

    int PDC_getclipboard(char **contents, long *length);
    int PDC_setclipboard(const char *contents, long length);
    int PDC_freeclipboard(char *contents);
    int PDC_clearclipboard(void);

### Description

   PDC_getclipboard() gets the textual contents of the system's
   clipboard. This function returns the contents of the clipboard
   in the contents argument. It is the responsibility of the
   caller to free the memory returned, via PDC_freeclipboard().
   The length of the clipboard contents is returned in the length
   argument.

   PDC_setclipboard copies the supplied text into the system's
   clipboard, emptying the clipboard prior to the copy.

   PDC_clearclipboard() clears the internal clipboard.

### Return Values

   indicator of success/failure of call.
   PDC_CLIP_SUCCESS        the call was successful
   PDC_CLIP_MEMORY_ERROR   unable to allocate sufficient memory for
                           the clipboard contents
   PDC_CLIP_EMPTY          the clipboard contains no text
   PDC_CLIP_ACCESS_ERROR   no clipboard support

### Portability
                             X/Open    BSD    SYS V
    PDC_getclipboard            -       -       -
    PDC_setclipboard            -       -       -
    PDC_freeclipboard           -       -       -
    PDC_clearclipboard          -       -       -

**man-end****************************************************************/

#ifdef PDC_WIDE
# define PDC_TEXT CF_UNICODETEXT
#else
# define PDC_TEXT CF_OEMTEXT
#endif

int PDC_getclipboard_handle( HANDLE *handle)
{
    PDC_LOG(("PDC_getclipboard() - called\n"));

    if (!OpenClipboard(NULL))
    {
        return PDC_CLIP_ACCESS_ERROR;
    }

    if ((*handle = GetClipboardData(PDC_TEXT)) == NULL)
    {
        CloseClipboard();
        return PDC_CLIP_EMPTY;
    }

    return PDC_CLIP_SUCCESS;
}

int PDC_getclipboard(char **contents, long *length)
{
    HANDLE handle;
    int rval = PDC_getclipboard_handle( &handle);

    if( rval == PDC_CLIP_SUCCESS)
    {
        void *tptr = GlobalLock( handle);

        if( tptr)
        {
#ifdef PDC_WIDE
            size_t len = wcslen((wchar_t *)tptr) * 3;
#else
            size_t len = strlen( tptr);
#endif

            *contents = (char *)GlobalAlloc( GMEM_FIXED, len + 1);

            if( !*contents)
                rval = PDC_CLIP_MEMORY_ERROR;
            else
            {
#ifdef PDC_WIDE
                len = PDC_wcstombs( (char *)*contents, tptr, len);
#else
                strcpy((char *)*contents, tptr);
#endif
            }
            *length = (long)len;
            GlobalUnlock( handle);
        }
        else
            rval = PDC_CLIP_MEMORY_ERROR;
        CloseClipboard();
    }
    return rval;
}

int PDC_setclipboard_raw( const char *contents, long length,
            const bool translate_multibyte_to_wide_char)
{
    HGLOBAL handle;
    LPTSTR buff;

    PDC_LOG(("PDC_setclipboard() - called\n"));

    if (!OpenClipboard(NULL))
        return PDC_CLIP_ACCESS_ERROR;

    handle = GlobalAlloc(GMEM_MOVEABLE|GMEM_DDESHARE,
        (length + 1) * sizeof(TCHAR));

    if (!handle)
        return PDC_CLIP_MEMORY_ERROR;

    buff = GlobalLock(handle);

#ifdef PDC_WIDE
    if( translate_multibyte_to_wide_char)
       PDC_mbstowcs((wchar_t *)buff, contents, length);
    else
       memcpy((char *)buff, contents, (length + 1) * sizeof( wchar_t));
#else
    memcpy((char *)buff, contents, length);
    buff[length] = 0;      /* ensure null termination */
#endif
    GlobalUnlock(handle);
    EmptyClipboard();

    if( !SetClipboardData(PDC_TEXT, handle))
    {
        GlobalFree(handle);
        return PDC_CLIP_ACCESS_ERROR;
    }

    CloseClipboard();

    return PDC_CLIP_SUCCESS;
}

int PDC_setclipboard(const char *contents, long length)
{
   return( PDC_setclipboard_raw( contents, length, TRUE));
}

int PDC_freeclipboard(char *contents)
{
    PDC_LOG(("PDC_freeclipboard() - called\n"));

    GlobalFree(contents);
    return PDC_CLIP_SUCCESS;
}

int PDC_clearclipboard(void)
{
    PDC_LOG(("PDC_clearclipboard() - called\n"));

    EmptyClipboard();

    return PDC_CLIP_SUCCESS;
}