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Tricks of the Windows Gam…ming Gurus (2nd Edition)
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Disc2.iso
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vc98
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mfc
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src
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filelist.cpp
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C/C++ Source or Header
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1998-06-16
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331 lines
// This is a part of the Microsoft Foundation Classes C++ library.
// Copyright (C) 1992-1998 Microsoft Corporation
// All rights reserved.
//
// This source code is only intended as a supplement to the
// Microsoft Foundation Classes Reference and related
// electronic documentation provided with the library.
// See these sources for detailed information regarding the
// Microsoft Foundation Classes product.
#include "stdafx.h"
#ifdef AFX_CORE1_SEG
#pragma code_seg(AFX_CORE1_SEG)
#endif
#ifdef _DEBUG
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
/////////////////////////////////////////////////////////////////////////////
// lpszCanon = C:\MYAPP\DEBUGS\C\TESWIN.C
//
// cchMax b Result
// ------ - ---------
// 1- 7 F <empty>
// 1- 7 T TESWIN.C
// 8-14 x TESWIN.C
// 15-16 x C:\...\TESWIN.C
// 17-23 x C:\...\C\TESWIN.C
// 24-25 x C:\...\DEBUGS\C\TESWIN.C
// 26+ x C:\MYAPP\DEBUGS\C\TESWIN.C
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 : &afxChNil);
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 = lpszCur - 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);
}
/////////////////////////////////////////////////////////////////////////////
// CRecentFileList
CRecentFileList::CRecentFileList(UINT nStart, LPCTSTR lpszSection,
LPCTSTR lpszEntryFormat, int nSize, int nMaxDispLen)
{
ASSERT(nSize != 0);
m_arrNames = new CString[nSize];
m_nSize = nSize;
m_nStart = nStart;
m_strSectionName = lpszSection;
m_strEntryFormat = lpszEntryFormat;
m_nMaxDisplayLength = nMaxDispLen;
}
CRecentFileList::~CRecentFileList()
{
delete[] m_arrNames;
}
// Operations
void CRecentFileList::Add(LPCTSTR lpszPathName)
{
ASSERT(m_arrNames != NULL);
ASSERT(lpszPathName != NULL);
ASSERT(AfxIsValidString(lpszPathName));
// fully qualify the path name
TCHAR szTemp[_MAX_PATH];
AfxFullPath(szTemp, lpszPathName);
// update the MRU list, if an existing MRU string matches file name
for (int iMRU = 0; iMRU < m_nSize-1; iMRU++)
{
if (AfxComparePath(m_arrNames[iMRU], szTemp))
break; // iMRU will point to matching entry
}
// move MRU strings before this one down
for (; iMRU > 0; iMRU--)
{
ASSERT(iMRU > 0);
ASSERT(iMRU < m_nSize);
m_arrNames[iMRU] = m_arrNames[iMRU-1];
}
// place this one at the beginning
m_arrNames[0] = szTemp;
}
void CRecentFileList::Remove(int nIndex)
{
ASSERT(nIndex >= 0);
ASSERT(nIndex < m_nSize);
m_arrNames[nIndex].Empty();
for (int iMRU = nIndex; iMRU < m_nSize-1; iMRU++)
m_arrNames[iMRU] = m_arrNames[iMRU+1];
ASSERT(iMRU < m_nSize);
m_arrNames[iMRU].Empty();
}
BOOL CRecentFileList::GetDisplayName(CString& strName, int nIndex,
LPCTSTR lpszCurDir, int nCurDir, BOOL bAtLeastName) const
{
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]);
// nLenDir is the length of the directory part of the full path
int nLenDir = lstrlen(lpch) - (AfxGetFileName(lpch, NULL, 0) - 1);
BOOL bSameDir = FALSE;
if (nLenDir == nCurDir)
{
TCHAR chSave = lpch[nLenDir];
lpch[nCurDir] = 0; // terminate at same location as current dir
bSameDir = lstrcmpi(lpszCurDir, lpch) == 0;
lpch[nLenDir] = chSave;
}
// copy the full path, otherwise abbreviate the name
if (bSameDir)
{
// copy file name only since directories are same
TCHAR szTemp[_MAX_PATH];
AfxGetFileTitle(lpch+nCurDir, szTemp, _countof(szTemp));
lstrcpyn(lpch, szTemp, _MAX_PATH);
}
else if (m_nMaxDisplayLength != -1)
{
// strip the extension if the system calls for it
TCHAR szTemp[_MAX_PATH];
AfxGetFileTitle(lpch+nLenDir, szTemp, _countof(szTemp));
lstrcpyn(lpch+nLenDir, szTemp, _MAX_PATH-nLenDir);
// abbreviate name based on what will fit in limited space
_AfxAbbreviateName(lpch, m_nMaxDisplayLength, bAtLeastName);
}
strName.ReleaseBuffer();
return TRUE;
}
void CRecentFileList::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;
for (int 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
}
void CRecentFileList::WriteList()
{
ASSERT(m_arrNames != NULL);
ASSERT(!m_strSectionName.IsEmpty());
ASSERT(!m_strEntryFormat.IsEmpty());
LPTSTR pszEntry = new TCHAR[m_strEntryFormat.GetLength()+5];
CWinApp* pApp = AfxGetApp();
pApp->WriteProfileString(m_strSectionName, NULL, NULL);
for (int iMRU = 0; iMRU < m_nSize; iMRU++)
{
wsprintf(pszEntry, m_strEntryFormat, iMRU + 1);
if (!m_arrNames[iMRU].IsEmpty())
{
pApp->WriteProfileString(m_strSectionName, pszEntry,
m_arrNames[iMRU]);
}
}
delete[] pszEntry;
}
void CRecentFileList::ReadList()
{
ASSERT(m_arrNames != NULL);
ASSERT(!m_strSectionName.IsEmpty());
ASSERT(!m_strEntryFormat.IsEmpty());
LPTSTR pszEntry = new TCHAR[m_strEntryFormat.GetLength()+5];
CWinApp* pApp = AfxGetApp();
for (int iMRU = 0; iMRU < m_nSize; iMRU++)
{
wsprintf(pszEntry, m_strEntryFormat, iMRU + 1);
m_arrNames[iMRU] = pApp->GetProfileString(
m_strSectionName, pszEntry, &afxChNil);
}
delete[] pszEntry;
}
/////////////////////////////////////////////////////////////////////////////