#include "stdafx.h"
#include "MyRecentFileList.h"

// Header information required to use obscure MFC functions
UINT AFXAPI AfxGetFileName(LPCTSTR lpszPathName, LPTSTR lpszTitle, UINT nMax);

// extra function cribbed from FILELIST.CPP in the MFC source
AFX_STATIC void AFXAPI _AfxAbbreviateName(LPTSTR lpszCanon, int cchMax, BOOL bAtLeastName)
{
	int cchFullPath, cchFileName, cchVolName;
	const TCHAR* lpszCur;
	const TCHAR* lpszBase;
	const TCHAR* lpszFileName;

	lpszBase = lpszCanon;
	cchFullPath = lstrlen(lpszCanon);

	cchFileName = AfxGetFileName(lpszCanon, NULL, 0) - 1;
	lpszFileName = lpszBase + (cchFullPath-cchFileName);

	// If cchMax is more than enough to hold the full path name, we're done.
	// This is probably a pretty common case, so we'll put it first.
	if (cchMax >= cchFullPath)
		return;

	// If cchMax isn't enough to hold at least the basename, we're done
	if (cchMax < cchFileName)
	{
		lstrcpy(lpszCanon, (bAtLeastName) ? lpszFileName : "");
		return;
	}

	// Calculate the length of the volume name.  Normally, this is two characters
	// (e.g., "C:", "D:", etc.), but for a UNC name, it could be more (e.g.,
	// "\\server\share").
	//
	// If cchMax isn't enough to hold at least <volume_name>\...\<base_name>, the
	// result is the base filename.

	lpszCur = lpszBase + 2;                 // Skip "C:" or leading "\\"

	if (lpszBase[0] == '\\' && lpszBase[1] == '\\') // UNC pathname
	{
		// First skip to the '\' between the server name and the share name,
		while (*lpszCur != '\\')
		{
			lpszCur = _tcsinc(lpszCur);
			ASSERT(*lpszCur != '\0');
		}
	}
	// if a UNC get the share name, if a drive get at least one directory
	ASSERT(*lpszCur == '\\');
	// make sure there is another directory, not just c:\filename.ext
	if (cchFullPath - cchFileName > 3)
	{
		lpszCur = _tcsinc(lpszCur);
		while (*lpszCur != '\\')
		{
			lpszCur = _tcsinc(lpszCur);
			ASSERT(*lpszCur != '\0');
		}
	}
	ASSERT(*lpszCur == '\\');

	cchVolName = (int) lpszCur - (int) lpszBase;
	if (cchMax < cchVolName + 5 + cchFileName)
	{
		lstrcpy(lpszCanon, lpszFileName);
		return;
	}

	// Now loop through the remaining directory components until something
	// of the form <volume_name>\...\<one_or_more_dirs>\<base_name> fits.
	//
	// Assert that the whole filename doesn't fit -- this should have been
	// handled earlier.

	ASSERT(cchVolName + (int)lstrlen(lpszCur) > cchMax);
	while (cchVolName + 4 + (int)lstrlen(lpszCur) > cchMax)
	{
		do
		{
			lpszCur = _tcsinc(lpszCur);
			ASSERT(*lpszCur != '\0');
		}
		while (*lpszCur != '\\');
	}

	// Form the resultant string and we're done.
	lpszCanon[cchVolName] = '\0';
	lstrcat(lpszCanon, _T("\\..."));
	lstrcat(lpszCanon, lpszCur);
}

BOOL MyCRecentFileList::GetDisplayName(CString& strName, int nIndex,
	LPCTSTR lpszCurDir, int nCurDir, BOOL bAtLeastName) 
{
	ASSERT(lpszCurDir == NULL || AfxIsValidString(lpszCurDir, nCurDir));

	ASSERT(m_arrNames != NULL);
	ASSERT(nIndex < m_nSize);
	if (m_arrNames[nIndex].IsEmpty())
		return FALSE;

	LPTSTR lpch = strName.GetBuffer(_MAX_PATH);
	lstrcpy(lpch, m_arrNames[nIndex]);

	// abbreviate name based on what will fit in limited space
	_AfxAbbreviateName(lpch, m_nMaxDisplayLength, bAtLeastName);

	strName.ReleaseBuffer(); 

	return TRUE;
}

void MyCRecentFileList::UpdateMenu(CCmdUI* pCmdUI)
{
	ASSERT(m_arrNames != NULL);

	CMenu* pMenu = pCmdUI->m_pMenu;
	if (m_strOriginal.IsEmpty() && pMenu != NULL)
		pMenu->GetMenuString(pCmdUI->m_nID, m_strOriginal, MF_BYCOMMAND);

	if (m_arrNames[0].IsEmpty())
	{
		// no MRU files
		if (!m_strOriginal.IsEmpty())
			pCmdUI->SetText(m_strOriginal);
		pCmdUI->Enable(FALSE);
		return;
	}

	if (pCmdUI->m_pMenu == NULL)
		return;

	int iMRU;
	for (iMRU = 0; iMRU < m_nSize; iMRU++)
		pCmdUI->m_pMenu->DeleteMenu(pCmdUI->m_nID + iMRU, MF_BYCOMMAND);

	TCHAR szCurDir[_MAX_PATH];
	GetCurrentDirectory(_MAX_PATH, szCurDir);
	int nCurDir = lstrlen(szCurDir);
	ASSERT(nCurDir >= 0);
	szCurDir[nCurDir] = '\\';
	szCurDir[++nCurDir] = '\0';

	CString strName;
	CString strTemp;
	for (iMRU = 0; iMRU < m_nSize; iMRU++)
	{
		if (!GetDisplayName(strName, iMRU, szCurDir, nCurDir))
			break;

		// double up any '&' characters so they are not underlined
		LPCTSTR lpszSrc = strName;
		LPTSTR lpszDest = strTemp.GetBuffer(strName.GetLength()*2);
		while (*lpszSrc != 0)
		{
			if (*lpszSrc == '&')
				*lpszDest++ = '&';
			if (_istlead(*lpszSrc))
				*lpszDest++ = *lpszSrc++;
			*lpszDest++ = *lpszSrc++;
		}
		*lpszDest = 0;
		strTemp.ReleaseBuffer();

		// insert mnemonic + the file name
		TCHAR buf[10];
		wsprintf(buf, _T("&%d "), (iMRU+1+m_nStart) % 10);
		pCmdUI->m_pMenu->InsertMenu(pCmdUI->m_nIndex++,
			MF_STRING | MF_BYPOSITION, pCmdUI->m_nID++,
			CString(buf) + strTemp);
	}

	// update end menu count
	pCmdUI->m_nIndex--; // point to last menu added
	pCmdUI->m_nIndexMax = pCmdUI->m_pMenu->GetMenuItemCount();

	pCmdUI->m_bEnableChanged = TRUE;    // all the added items are enabled
}
