NPPM_DOOPEN: wrong return value

[Vitaliy Dovgan]

The message NPPM_DOOPEN is declared as:

#define NPPM_DOOPEN (NPPMSG + 77)
// BOOL NPPM_DOOPEN(0, const TCHAR *fullPathName2Open)
// fullPathName2Open indicates the full file path name to be opened.
// The return value is TRUE (1) if the operation is successful, otherwise FALSE (0).

The return value is correct when fullPathName2Open is a file (path)name.
If, however, the fullPathName2Open is a folder, Notepad++ does open all the files from this folder, but NPPM_DOOPEN returns 0 !

[dail]

I can at least confirm I am seeing the same behavior as you.

As a side note: the “documentation” in that file has more than a few errors if you actually compare them to the code :)

[Vitaliy Dovgan]

OK, I’ve found how to deal with it. At least, it’s one of possible solutions:

int nFiles = (int) SendNppMsg(NPPM_GETNBOPENFILES, 0, 0);
if ( !SendNppMsg(NPPM_DOOPEN, (WPARAM) 0, (LPARAM) params.c_str()) )
{
    nCmdResult = CMDRESULT_FAILED;
    DWORD dwAttr = ::GetFileAttributes(params.c_str());
    if ( (dwAttr != INVALID_FILE_ATTRIBUTES) &&
         ((dwAttr & FILE_ATTRIBUTE_DIRECTORY) == FILE_ATTRIBUTE_DIRECTORY) )
    {
        // NPPM_DOOPEN unexpectedly returns 0 when a folder is specified
        // as its argument, though in fact it does open all the files
        // from that folder.
        int nFilesNow = (int) SendNppMsg(NPPM_GETNBOPENFILES, 0, 0);
        if ( nFilesNow != nFiles )
        {
            nCmdResult = CMDRESULT_SUCCEEDED;
        }
    }
}