home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Tricks of the Windows Gam…ming Gurus (2nd Edition)
/
Disc2.iso
/
vc98
/
mfc
/
src
/
viewedit.cpp
< prev
next >
Wrap
C/C++ Source or Header
|
1998-06-16
|
34KB
|
1,322 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"
#include <ctype.h>
#ifdef AFX_CORE4_SEG
#pragma code_seg(AFX_CORE4_SEG)
#endif
#ifdef _DEBUG
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
/////////////////////////////////////////////////////////////////////////////
// CEditView
#define new DEBUG_NEW
AFX_STATIC const UINT _afxMsgFindReplace = ::RegisterWindowMessage(FINDMSGSTRING);
#ifdef _UNICODE
AFX_STATIC_DATA HFONT _afxUnicodeFont = 0;
void AFX_CDECL AfxEditviewTerm()
{
AfxDeleteObject((HGDIOBJ*)&_afxUnicodeFont);
}
char _afxEditviewTerm = (char)atexit(&AfxEditviewTerm);
#endif //_UNICODE
BEGIN_MESSAGE_MAP(CEditView, CCtrlView)
//{{AFX_MSG_MAP(CEditView)
ON_UPDATE_COMMAND_UI(ID_EDIT_CUT, OnUpdateNeedSel)
ON_UPDATE_COMMAND_UI(ID_EDIT_PASTE, OnUpdateNeedClip)
ON_UPDATE_COMMAND_UI(ID_EDIT_SELECT_ALL, OnUpdateNeedText)
ON_UPDATE_COMMAND_UI(ID_EDIT_UNDO, OnUpdateEditUndo)
ON_UPDATE_COMMAND_UI(ID_EDIT_FIND, OnUpdateNeedText)
ON_UPDATE_COMMAND_UI(ID_EDIT_REPLACE, OnUpdateNeedText)
ON_UPDATE_COMMAND_UI(ID_EDIT_REPEAT, OnUpdateNeedFind)
ON_UPDATE_COMMAND_UI(ID_EDIT_COPY, OnUpdateNeedSel)
ON_UPDATE_COMMAND_UI(ID_EDIT_CLEAR, OnUpdateNeedSel)
ON_CONTROL_REFLECT_EX(EN_CHANGE, OnEditChange)
ON_WM_CREATE()
ON_MESSAGE(WM_SETFONT, OnSetFont)
ON_COMMAND(ID_EDIT_CUT, OnEditCut)
ON_COMMAND(ID_EDIT_COPY, OnEditCopy)
ON_COMMAND(ID_EDIT_PASTE, OnEditPaste)
ON_COMMAND(ID_EDIT_CLEAR, OnEditClear)
ON_COMMAND(ID_EDIT_UNDO, OnEditUndo)
ON_COMMAND(ID_EDIT_SELECT_ALL, OnEditSelectAll)
ON_COMMAND(ID_EDIT_FIND, OnEditFind)
ON_COMMAND(ID_EDIT_REPLACE, OnEditReplace)
ON_COMMAND(ID_EDIT_REPEAT, OnEditRepeat)
ON_WM_DESTROY()
//}}AFX_MSG_MAP
// Special registered message for Find and Replace
ON_REGISTERED_MESSAGE(_afxMsgFindReplace, OnFindReplaceCmd)
// Standard Print commands (print only - not preview)
ON_COMMAND(ID_FILE_PRINT, CCtrlView::OnFilePrint)
ON_COMMAND(ID_FILE_PRINT_DIRECT, CCtrlView::OnFilePrint)
END_MESSAGE_MAP()
const AFX_DATADEF DWORD CEditView::dwStyleDefault =
AFX_WS_DEFAULT_VIEW |
WS_HSCROLL | WS_VSCROLL |
ES_AUTOHSCROLL | ES_AUTOVSCROLL |
ES_MULTILINE | ES_NOHIDESEL;
// Operating system specific maximum buffer limit
const AFX_DATADEF UINT CEditView::nMaxSize = 1024U*1024U-1;
/////////////////////////////////////////////////////////////////////////////
// _AFX_EDIT_STATE
_AFX_EDIT_STATE::_AFX_EDIT_STATE()
{
// Note: it is only necessary to initialize non-zero data.
bNext = TRUE;
}
_AFX_EDIT_STATE::~_AFX_EDIT_STATE()
{
}
EXTERN_PROCESS_LOCAL(_AFX_EDIT_STATE, _afxEditState)
/////////////////////////////////////////////////////////////////////////////
// CEditView construction/destruction
// pass a NULL style because dwStyleDefault stays for backward compatibility
CEditView::CEditView() : CCtrlView(_T("EDIT"), NULL)
{
m_nTabStops = 8*4; // default 8 character positions
m_hPrinterFont = NULL;
m_hMirrorFont = NULL;
m_pShadowBuffer = NULL;
m_nShadowSize = 0;
}
CEditView::~CEditView()
{
ASSERT(m_hWnd == NULL);
ASSERT(m_pShadowBuffer == NULL || afxData.bWin95);
delete[] m_pShadowBuffer;
}
BOOL CEditView::PreCreateWindow(CREATESTRUCT& cs)
{
m_dwDefaultStyle = dwStyleDefault;
return CCtrlView::PreCreateWindow(cs);
}
int CEditView::OnCreate(LPCREATESTRUCT lpcs)
{
if (CCtrlView::OnCreate(lpcs) != 0)
return -1;
#ifdef _UNICODE
AfxLockGlobals(CRIT_EDITVIEW);
if (_afxUnicodeFont == NULL)
{
// get unicode font same size as system font
HFONT hSystemFont = (HFONT)GetStockObject(SYSTEM_FONT);
LOGFONT systemFont;
VERIFY(::GetObject(hSystemFont, sizeof(LOGFONT), (void*)&systemFont));
// default size and facename, but allow customization
LOGFONT logFont; memset(&logFont, 0, sizeof(LOGFONT));
logFont.lfHeight = systemFont.lfHeight;
logFont.lfWeight = systemFont.lfWeight;
logFont.lfCharSet = DEFAULT_CHARSET;
lstrcpy(logFont.lfFaceName, _T("Lucida Sans Unicode"));
AfxCustomLogFont(AFX_IDS_UNICODE_FONT, &logFont);
// attempt to create the font
_afxUnicodeFont = ::CreateFontIndirect(&logFont);
if (_afxUnicodeFont == NULL)
TRACE1("Unable to create unicode font '%s'.\n", logFont.lfFaceName);
}
AfxUnlockGlobals(CRIT_EDITVIEW);
// set unicode font instead of using system font
if (_afxUnicodeFont != NULL)
SendMessage(WM_SETFONT, (WPARAM)_afxUnicodeFont);
#endif
GetEditCtrl().LimitText(nMaxSize);
GetEditCtrl().SetTabStops(m_nTabStops);
return 0;
}
void CEditView::OnDestroy()
{
_AFX_EDIT_STATE* pEditState = _afxEditState;
pEditState->pFindReplaceDlg = NULL;
CView::OnDestroy();
}
// EDIT controls always turn off WS_BORDER and draw it themselves
void CEditView::CalcWindowRect(LPRECT lpClientRect, UINT nAdjustType)
{
if (nAdjustType != 0)
{
// default behavior for in-place editing handles scrollbars
DWORD dwStyle = GetStyle();
if (dwStyle & WS_VSCROLL)
lpClientRect->right += afxData.cxVScroll - CX_BORDER;
if (dwStyle & WS_HSCROLL)
lpClientRect->bottom += afxData.cyHScroll - CY_BORDER;
return;
}
::AdjustWindowRectEx(lpClientRect, GetStyle() | WS_BORDER, FALSE,
GetExStyle() & ~(WS_EX_CLIENTEDGE));
}
/////////////////////////////////////////////////////////////////////////////
// CEditView document like functions
void CEditView::DeleteContents()
{
ASSERT_VALID(this);
ASSERT(m_hWnd != NULL);
SetWindowText(NULL);
ASSERT_VALID(this);
}
void CEditView::Serialize(CArchive& ar)
// Read and write CEditView object to archive, with length prefix.
{
ASSERT_VALID(this);
ASSERT(m_hWnd != NULL);
if (ar.IsStoring())
{
UINT nLen = GetBufferLength();
ar << (DWORD)nLen;
WriteToArchive(ar);
}
else
{
DWORD dwLen;
ar >> dwLen;
if (dwLen > nMaxSize)
AfxThrowArchiveException(CArchiveException::badIndex);
UINT nLen = (UINT)dwLen;
ReadFromArchive(ar, nLen);
}
ASSERT_VALID(this);
}
void CEditView::ReadFromArchive(CArchive& ar, UINT nLen)
// Read certain amount of text from the file, assume at least nLen
// characters (not bytes) are in the file.
{
ASSERT_VALID(this);
LPVOID hText = LocalAlloc(LMEM_MOVEABLE, (nLen+1)*sizeof(TCHAR));
if (hText == NULL)
AfxThrowMemoryException();
LPTSTR lpszText = (LPTSTR)LocalLock(hText);
ASSERT(lpszText != NULL);
if (ar.Read(lpszText, nLen*sizeof(TCHAR)) != nLen*sizeof(TCHAR))
{
LocalUnlock(hText);
LocalFree(hText);
AfxThrowArchiveException(CArchiveException::endOfFile);
}
// Replace the editing edit buffer with the newly loaded data
lpszText[nLen] = '\0';
#ifndef _UNICODE
if (afxData.bWin95)
{
// set the text with SetWindowText, then free
BOOL bResult = ::SetWindowText(m_hWnd, lpszText);
LocalUnlock(hText);
LocalFree(hText);
// make sure that SetWindowText was successful
if (!bResult || ::GetWindowTextLength(m_hWnd) < (int)nLen)
AfxThrowMemoryException();
// remove old shadow buffer
delete[] m_pShadowBuffer;
m_pShadowBuffer = NULL;
m_nShadowSize = 0;
ASSERT_VALID(this);
return;
}
#endif
LocalUnlock(hText);
HLOCAL hOldText = GetEditCtrl().GetHandle();
ASSERT(hOldText != NULL);
LocalFree(hOldText);
GetEditCtrl().SetHandle((HLOCAL)(UINT)(DWORD)hText);
Invalidate();
ASSERT_VALID(this);
}
void CEditView::WriteToArchive(CArchive& ar)
// Write just the text to an archive, no length prefix.
{
ASSERT_VALID(this);
LPCTSTR lpszText = LockBuffer();
ASSERT(lpszText != NULL);
UINT nLen = GetBufferLength();
TRY
{
ar.Write(lpszText, nLen*sizeof(TCHAR));
}
CATCH_ALL(e)
{
UnlockBuffer();
THROW_LAST();
}
END_CATCH_ALL
UnlockBuffer();
ASSERT_VALID(this);
}
void CEditView::SerializeRaw(CArchive& ar)
// Read/Write object as stand-alone file.
{
ASSERT_VALID(this);
if (ar.IsStoring())
{
WriteToArchive(ar);
}
else
{
CFile* pFile = ar.GetFile();
ASSERT(pFile->GetPosition() == 0);
DWORD nFileSize = pFile->GetLength();
if (nFileSize/sizeof(TCHAR) > nMaxSize)
{
AfxMessageBox(AFX_IDP_FILE_TOO_LARGE);
AfxThrowUserException();
}
// ReadFromArchive takes the number of characters as argument
ReadFromArchive(ar, (UINT)nFileSize/sizeof(TCHAR));
}
ASSERT_VALID(this);
}
/////////////////////////////////////////////////////////////////////////////
// CEditView Printing Helpers
AFX_STATIC UINT AFXAPI _AfxEndOfLine(LPCTSTR lpszText, UINT nLen, UINT nIndex)
{
ASSERT(AfxIsValidAddress(lpszText, nLen, FALSE));
LPCTSTR lpsz = lpszText + nIndex;
LPCTSTR lpszStop = lpszText + nLen;
while (lpsz < lpszStop && *lpsz != '\r')
++lpsz;
return lpsz - lpszText;
}
AFX_STATIC UINT AFXAPI _AfxNextLine(LPCTSTR lpszText, UINT nLen, UINT nIndex)
{
ASSERT(AfxIsValidAddress(lpszText, nLen, FALSE));
LPCTSTR lpsz = lpszText + nIndex;
LPCTSTR lpszStop = lpszText + nLen;
while (lpsz < lpszStop && *lpsz == '\r')
++lpsz;
if (lpsz < lpszStop && *lpsz == '\n')
++lpsz;
return lpsz - lpszText;
}
AFX_STATIC UINT AFXAPI
_AfxClipLine(CDC* pDC, int aCharWidths[256], int cxLine, int nTabStop,
LPCTSTR lpszText, UINT nIndex, UINT nIndexEnd)
{
ASSERT_VALID(pDC);
ASSERT(nIndex < nIndexEnd);
ASSERT(AfxIsValidAddress(lpszText, nIndexEnd, FALSE));
TEXTMETRIC tm;
::GetTextMetrics(pDC->m_hDC, &tm);
// make an initial guess on the number of characters that will fit
int cx = 0;
LPCTSTR lpszStart = lpszText + nIndex;
LPCTSTR lpszStop = lpszText + nIndexEnd;
LPCTSTR lpsz = lpszStart;
while (lpsz < lpszStop)
{
if (*lpsz == '\t')
cx += nTabStop - (cx % nTabStop);
else
{
#ifdef _UNICODE
if (*lpsz <= 0xFF)
cx += aCharWidths[(BYTE)*lpsz];
else
cx += tm.tmAveCharWidth;
#else //_UNICODE
if (_afxDBCS && _istlead(*lpsz))
{
++lpsz;
cx += tm.tmAveCharWidth;
}
else
cx += aCharWidths[(BYTE)*lpsz];
#endif //!_UNICODE
}
++lpsz;
if (cx > cxLine)
break;
}
// adjust for errors in the guess
cx = pDC->GetTabbedTextExtent(lpszStart, lpsz-lpszStart, 1, &nTabStop).cx;
if (cx > cxLine)
{
// remove characters until it fits
do
{
ASSERT(lpsz != lpszStart);
if (_afxDBCS)
lpsz = _tcsdec(lpszStart, lpsz);
else
--lpsz;
cx = pDC->GetTabbedTextExtent(lpszStart, lpsz-lpszStart, 1, &nTabStop).cx;
} while (cx > cxLine);
}
else if (cx < cxLine)
{
// add characters until it doesn't fit
while (lpsz < lpszStop)
{
lpsz = _tcsinc(lpsz);
ASSERT(lpsz <= lpszStop);
cx = pDC->GetTabbedTextExtent(lpszStart, lpsz-lpszStart, 1, &nTabStop).cx;
if (cx > cxLine)
{
if (_afxDBCS)
lpsz = _tcsdec(lpszStart, lpsz);
else
--lpsz;
break;
}
}
}
// return index of character just past the last that would fit
return lpsz - lpszText;
}
/////////////////////////////////////////////////////////////////////////////
// CEditView Printing support
BOOL CEditView::OnPreparePrinting(CPrintInfo* pInfo)
{
return DoPreparePrinting(pInfo);
}
void CEditView::OnBeginPrinting(CDC* pDC, CPrintInfo*)
{
ASSERT_VALID(this);
ASSERT_VALID(pDC);
// initialize page start vector
ASSERT(m_aPageStart.GetSize() == 0);
m_aPageStart.Add(0);
ASSERT(m_aPageStart.GetSize() > 0);
if (m_hPrinterFont == NULL)
{
// get current screen font object metrics
CFont* pFont = GetFont();
LOGFONT lf;
LOGFONT lfSys;
if (pFont == NULL)
return;
VERIFY(pFont->GetObject(sizeof(LOGFONT), &lf));
VERIFY(::GetObject(::GetStockObject(SYSTEM_FONT), sizeof(LOGFONT),
&lfSys));
if (lstrcmpi((LPCTSTR)lf.lfFaceName, (LPCTSTR)lfSys.lfFaceName) == 0)
return;
// map to printer font metrics
HDC hDCFrom = ::GetDC(NULL);
lf.lfHeight = ::MulDiv(lf.lfHeight, pDC->GetDeviceCaps(LOGPIXELSY),
::GetDeviceCaps(hDCFrom, LOGPIXELSY));
lf.lfWidth = ::MulDiv(lf.lfWidth, pDC->GetDeviceCaps(LOGPIXELSX),
::GetDeviceCaps(hDCFrom, LOGPIXELSX));
::ReleaseDC(NULL, hDCFrom);
// create it, if it fails we just use the printer's default.
m_hMirrorFont = ::CreateFontIndirect(&lf);
m_hPrinterFont = m_hMirrorFont;
}
ASSERT_VALID(this);
}
BOOL CEditView::PaginateTo(CDC* pDC, CPrintInfo* pInfo)
// attempts pagination to pInfo->m_nCurPage, TRUE == success
{
ASSERT_VALID(this);
ASSERT_VALID(pDC);
CRect rectSave = pInfo->m_rectDraw;
UINT nPageSave = pInfo->m_nCurPage;
ASSERT(nPageSave > 1);
ASSERT(nPageSave >= (UINT)m_aPageStart.GetSize());
VERIFY(pDC->SaveDC() != 0);
pDC->IntersectClipRect(0, 0, 0, 0);
pInfo->m_nCurPage = m_aPageStart.GetSize();
while (pInfo->m_nCurPage < nPageSave)
{
ASSERT(pInfo->m_nCurPage == (UINT)m_aPageStart.GetSize());
OnPrepareDC(pDC, pInfo);
ASSERT(pInfo->m_bContinuePrinting);
pInfo->m_rectDraw.SetRect(0, 0,
pDC->GetDeviceCaps(HORZRES), pDC->GetDeviceCaps(VERTRES));
pDC->DPtoLP(&pInfo->m_rectDraw);
OnPrint(pDC, pInfo);
if (pInfo->m_nCurPage == (UINT)m_aPageStart.GetSize())
break;
++pInfo->m_nCurPage;
}
BOOL bResult = pInfo->m_nCurPage == nPageSave;
pDC->RestoreDC(-1);
pInfo->m_nCurPage = nPageSave;
pInfo->m_rectDraw = rectSave;
ASSERT_VALID(this);
return bResult;
}
void CEditView::OnPrepareDC(CDC* pDC, CPrintInfo* pInfo)
{
ASSERT_VALID(this);
ASSERT_VALID(pDC);
ASSERT(pInfo != NULL); // overriding OnPaint -- never get this.
if (pInfo->m_nCurPage > (UINT)m_aPageStart.GetSize() &&
!PaginateTo(pDC, pInfo))
{
// can't paginate to that page, thus cannot print it.
pInfo->m_bContinuePrinting = FALSE;
}
ASSERT_VALID(this);
}
UINT CEditView::PrintInsideRect(CDC* pDC, RECT& rectLayout,
UINT nIndexStart, UINT nIndexStop)
// worker function for laying out text in a rectangle.
{
ASSERT_VALID(this);
ASSERT_VALID(pDC);
BOOL bWordWrap = (GetStyle() & ES_AUTOHSCROLL) == 0;
// get buffer and real starting and ending postions
UINT nLen = GetBufferLength();
if (nIndexStart >= nLen)
return nLen;
LPCTSTR lpszText = LockBuffer();
if (nIndexStop > nLen)
nIndexStop = nLen;
ASSERT(nIndexStart < nLen);
// calculate text & tab metrics
TEXTMETRIC tm;
pDC->GetTextMetrics(&tm);
int cyChar = tm.tmHeight + tm.tmExternalLeading;
int nTabStop = m_nTabStops *
pDC->GetTabbedTextExtent(_T("\t"), 1, 0, NULL).cx / 8 / 4;
int aCharWidths[256];
pDC->GetCharWidth(0, 255, aCharWidths);
int y = rectLayout.top;
UINT cx = rectLayout.right - rectLayout.left;
UINT nIndex = nIndexStart;
VERIFY(pDC->SaveDC() != 0);
BOOL bLayoutOnly = pDC->IntersectClipRect(&rectLayout) == NULLREGION;
do
{
UINT nIndexEnd = _AfxEndOfLine(lpszText, nIndexStop, nIndex);
if (nIndex == nIndexEnd)
{
y += cyChar;
}
else if (bWordWrap)
{
// word-wrap printing
do
{
UINT nIndexWrap = _AfxClipLine(pDC, aCharWidths,
cx, nTabStop, lpszText, nIndex, nIndexEnd);
UINT nIndexWord = nIndexWrap;
if (nIndexWord != nIndexEnd)
{
while (nIndexWord > nIndex &&
!_istspace(lpszText[nIndexWord]))
{
nIndexWord--;
}
if (nIndexWord == nIndex)
nIndexWord = nIndexWrap;
}
CRect rect(rectLayout.left, y, rectLayout.right, y+cyChar);
if (!bLayoutOnly && pDC->RectVisible(rect))
{
pDC->TabbedTextOut(rect.left, y,
(LPCTSTR)(lpszText+nIndex), nIndexWord-nIndex, 1,
&nTabStop, rect.left);
}
y += cyChar;
nIndex = nIndexWord;
while (nIndex < nIndexEnd && _istspace(lpszText[nIndex]))
nIndex++;
} while (nIndex < nIndexEnd && y+cyChar <= rectLayout.bottom);
nIndexEnd = nIndex;
}
else
{
// non-word wrap printing (much easier and faster)
CRect rect(rectLayout.left, y, rectLayout.right, y+cyChar);
if (!bLayoutOnly && pDC->RectVisible(rect))
{
UINT nIndexClip = _AfxClipLine(pDC, aCharWidths, cx, nTabStop,
lpszText, nIndex, nIndexEnd);
if (nIndexClip < nIndexEnd)
{
if (_istlead(*(lpszText+nIndexClip)))
nIndexClip++;
nIndexClip++;
}
pDC->TabbedTextOut(rect.left, y,
(LPCTSTR)(lpszText+nIndex), nIndexClip-nIndex, 1,
&nTabStop, rect.left);
}
y += cyChar;
}
nIndex = _AfxNextLine(lpszText, nIndexStop, nIndexEnd);
}
while (nIndex < nIndexStop && y+cyChar <= rectLayout.bottom);
pDC->RestoreDC(-1);
UnlockBuffer();
ASSERT_VALID(this);
rectLayout.bottom = y;
return nIndex;
}
void CEditView::OnPrint(CDC* pDC, CPrintInfo* pInfo)
{
ASSERT_VALID(this);
ASSERT_VALID(pDC);
ASSERT(pInfo != NULL);
ASSERT(pInfo->m_bContinuePrinting);
CFont* pOldFont = NULL;
if (m_hPrinterFont != NULL)
pOldFont = pDC->SelectObject(CFont::FromHandle(m_hPrinterFont));
pDC->SetBkMode(TRANSPARENT);
UINT nPage = pInfo->m_nCurPage;
ASSERT(nPage <= (UINT)m_aPageStart.GetSize());
UINT nIndex = m_aPageStart[nPage-1];
// print as much as possible in the current page.
nIndex = PrintInsideRect(pDC, pInfo->m_rectDraw, nIndex, GetBufferLength());
if (pOldFont != NULL)
pDC->SelectObject(pOldFont);
// update pagination information for page just printed
if (nPage == (UINT)m_aPageStart.GetSize())
{
if (nIndex < GetBufferLength())
m_aPageStart.Add(nIndex);
}
else
{
ASSERT(nPage+1 <= (UINT)m_aPageStart.GetSize());
ASSERT(nIndex == m_aPageStart[nPage+1-1]);
}
}
void CEditView::OnEndPrinting(CDC*, CPrintInfo*)
{
ASSERT_VALID(this);
m_aPageStart.RemoveAll();
if (m_hMirrorFont != NULL && m_hPrinterFont == m_hMirrorFont)
{
AfxDeleteObject((HGDIOBJ*)&m_hMirrorFont);
m_hPrinterFont = NULL;
}
}
/////////////////////////////////////////////////////////////////////////////
// CEditView commands
void CEditView::OnUpdateNeedSel(CCmdUI* pCmdUI)
{
ASSERT_VALID(this);
int nStartChar, nEndChar;
GetEditCtrl().GetSel(nStartChar, nEndChar);
pCmdUI->Enable(nStartChar != nEndChar);
ASSERT_VALID(this);
}
void CEditView::OnUpdateNeedClip(CCmdUI* pCmdUI)
{
ASSERT_VALID(this);
pCmdUI->Enable(::IsClipboardFormatAvailable(CF_TEXT));
ASSERT_VALID(this);
}
void CEditView::OnUpdateNeedText(CCmdUI* pCmdUI)
{
ASSERT_VALID(this);
pCmdUI->Enable(GetWindowTextLength() != 0);
ASSERT_VALID(this);
}
void CEditView::OnUpdateNeedFind(CCmdUI* pCmdUI)
{
ASSERT_VALID(this);
_AFX_EDIT_STATE* pEditState = _afxEditState;
pCmdUI->Enable(GetWindowTextLength() != 0 &&
!pEditState->strFind.IsEmpty());
ASSERT_VALID(this);
}
void CEditView::OnUpdateEditUndo(CCmdUI* pCmdUI)
{
ASSERT_VALID(this);
pCmdUI->Enable(GetEditCtrl().CanUndo());
ASSERT_VALID(this);
}
BOOL CEditView::OnEditChange()
{
ASSERT_VALID(this);
GetDocument()->SetModifiedFlag();
ASSERT_VALID(this);
return FALSE; // continue routing
}
void CEditView::OnEditCut()
{
ASSERT_VALID(this);
GetEditCtrl().Cut();
ASSERT_VALID(this);
}
void CEditView::OnEditCopy()
{
ASSERT_VALID(this);
GetEditCtrl().Copy();
ASSERT_VALID(this);
}
void CEditView::OnEditPaste()
{
ASSERT_VALID(this);
GetEditCtrl().Paste();
ASSERT_VALID(this);
}
void CEditView::OnEditClear()
{
ASSERT_VALID(this);
GetEditCtrl().Clear();
ASSERT_VALID(this);
}
void CEditView::OnEditUndo()
{
ASSERT_VALID(this);
GetEditCtrl().Undo();
ASSERT_VALID(this);
}
void CEditView::OnEditSelectAll()
{
ASSERT_VALID(this);
GetEditCtrl().SetSel(0, -1);
ASSERT_VALID(this);
}
/////////////////////////////////////////////////////////////////////////////
// CEditView Font Handling
LRESULT CEditView::OnSetFont(WPARAM, LPARAM)
{
ASSERT_VALID(this);
Default();
GetEditCtrl().SetTabStops(m_nTabStops);
ASSERT_VALID(this);
return 0;
}
void CEditView::SetPrinterFont(CFont* pFont)
{
ASSERT_VALID(this);
m_hPrinterFont = (HFONT)pFont->GetSafeHandle();
ASSERT_VALID(this);
}
CFont* CEditView::GetPrinterFont() const
{
ASSERT_VALID(this);
return CFont::FromHandle(m_hPrinterFont);
}
/////////////////////////////////////////////////////////////////////////////
// CEditView attributes
LPCTSTR CEditView::LockBuffer() const
{
ASSERT_VALID(this);
ASSERT(m_hWnd != NULL);
#ifndef _UNICODE
if (afxData.bWin95)
{
// under Win32s, it is necessary to maintain a shadow buffer
// it is only updated when the control contents have been changed.
if (m_pShadowBuffer == NULL || GetEditCtrl().GetModify())
{
ASSERT(m_pShadowBuffer != NULL || m_nShadowSize == 0);
UINT nSize = GetWindowTextLength()+1;
if (nSize > m_nShadowSize)
{
// need more room for shadow buffer
CEditView* pThis = (CEditView*)this;
delete[] m_pShadowBuffer;
pThis->m_pShadowBuffer = NULL;
pThis->m_nShadowSize = 0;
pThis->m_pShadowBuffer = new TCHAR[nSize];
pThis->m_nShadowSize = nSize;
}
// update the shadow buffer with GetWindowText
ASSERT(m_nShadowSize >= nSize);
ASSERT(m_pShadowBuffer != NULL);
GetWindowText(m_pShadowBuffer, nSize);
// turn off edit control's modify bit
GetEditCtrl().SetModify(FALSE);
}
return m_pShadowBuffer;
}
#endif
// else -- running under non-subset Win32 system
HLOCAL hLocal = GetEditCtrl().GetHandle();
ASSERT(hLocal != NULL);
LPCTSTR lpszText = (LPCTSTR)LocalLock(hLocal);
ASSERT(lpszText != NULL);
ASSERT_VALID(this);
return lpszText;
}
void CEditView::UnlockBuffer() const
{
ASSERT_VALID(this);
ASSERT(m_hWnd != NULL);
#ifndef _UNICODE
if (afxData.bWin95)
return;
#endif
HLOCAL hLocal = GetEditCtrl().GetHandle();
ASSERT(hLocal != NULL);
LocalUnlock(hLocal);
}
// this function returns the length in characters
UINT CEditView::GetBufferLength() const
{
ASSERT_VALID(this);
ASSERT(m_hWnd != NULL);
LPCTSTR lpszText = LockBuffer();
UINT nLen = lstrlen(lpszText);
UnlockBuffer();
return nLen;
}
void CEditView::GetSelectedText(CString& strResult) const
{
ASSERT_VALID(this);
int nStartChar, nEndChar;
GetEditCtrl().GetSel(nStartChar, nEndChar);
ASSERT((UINT)nEndChar <= GetBufferLength());
LPCTSTR lpszText = ((CEditView*)this)->LockBuffer();
UINT nLen = _AfxEndOfLine(lpszText, nEndChar, nStartChar) - nStartChar;
memcpy(strResult.GetBuffer(nLen), lpszText + nStartChar,
nLen * sizeof(TCHAR));
strResult.ReleaseBuffer(nLen);
UnlockBuffer();
ASSERT_VALID(this);
}
/////////////////////////////////////////////////////////////////////////////
// CEditView Find & Replace
void CEditView::OnEditFind()
{
ASSERT_VALID(this);
OnEditFindReplace(TRUE);
ASSERT_VALID(this);
}
void CEditView::OnEditReplace()
{
ASSERT_VALID(this);
OnEditFindReplace(FALSE);
ASSERT_VALID(this);
}
void CEditView::OnEditRepeat()
{
ASSERT_VALID(this);
_AFX_EDIT_STATE* pEditState = _afxEditState;
if (!FindText(pEditState->strFind,
pEditState->bNext,
pEditState->bCase))
{
OnTextNotFound(pEditState->strFind);
}
ASSERT_VALID(this);
}
void CEditView::OnEditFindReplace(BOOL bFindOnly)
{
ASSERT_VALID(this);
_AFX_EDIT_STATE* pEditState = _afxEditState;
if (pEditState->pFindReplaceDlg != NULL)
{
if (pEditState->bFindOnly == bFindOnly)
{
pEditState->pFindReplaceDlg->SetActiveWindow();
pEditState->pFindReplaceDlg->ShowWindow(SW_SHOW);
return;
}
ASSERT(pEditState->bFindOnly != bFindOnly);
pEditState->pFindReplaceDlg->SendMessage(WM_CLOSE);
ASSERT(pEditState->pFindReplaceDlg == NULL);
ASSERT_VALID(this);
}
CString strFind;
GetSelectedText(strFind);
if (strFind.IsEmpty())
strFind = pEditState->strFind;
CString strReplace = pEditState->strReplace;
pEditState->pFindReplaceDlg = new CFindReplaceDialog;
ASSERT(pEditState->pFindReplaceDlg != NULL);
DWORD dwFlags = FR_HIDEWHOLEWORD;
if (pEditState->bNext)
dwFlags |= FR_DOWN;
if (pEditState->bCase)
dwFlags |= FR_MATCHCASE;
if (!pEditState->pFindReplaceDlg->Create(bFindOnly, strFind,
strReplace, dwFlags, this))
{
pEditState->pFindReplaceDlg = NULL;
ASSERT_VALID(this);
return;
}
pEditState->pFindReplaceDlg->SetActiveWindow();
pEditState->pFindReplaceDlg->ShowWindow(SW_SHOW);
ASSERT(pEditState->pFindReplaceDlg != NULL);
pEditState->bFindOnly = bFindOnly;
ASSERT_VALID(this);
}
void CEditView::OnFindNext(LPCTSTR lpszFind, BOOL bNext, BOOL bCase)
{
ASSERT_VALID(this);
_AFX_EDIT_STATE* pEditState = _afxEditState;
pEditState->strFind = lpszFind;
pEditState->bCase = bCase;
pEditState->bNext = bNext;
if (!FindText(pEditState->strFind, bNext, bCase))
OnTextNotFound(pEditState->strFind);
ASSERT_VALID(this);
}
void CEditView::OnReplaceSel(LPCTSTR lpszFind, BOOL bNext, BOOL bCase,
LPCTSTR lpszReplace)
{
ASSERT_VALID(this);
_AFX_EDIT_STATE* pEditState = _afxEditState;
pEditState->strFind = lpszFind;
pEditState->strReplace = lpszReplace;
pEditState->bCase = bCase;
pEditState->bNext = bNext;
if (!InitializeReplace())
return;
GetEditCtrl().ReplaceSel(pEditState->strReplace);
FindText(pEditState->strFind, bNext, bCase);
ASSERT_VALID(this);
}
void CEditView::OnReplaceAll(LPCTSTR lpszFind, LPCTSTR lpszReplace, BOOL bCase)
{
ASSERT_VALID(this);
_AFX_EDIT_STATE* pEditState = _afxEditState;
pEditState->strFind = lpszFind;
pEditState->strReplace = lpszReplace;
pEditState->bCase = bCase;
pEditState->bNext = TRUE;
if (!InitializeReplace() &&
!SameAsSelected(pEditState->strFind, pEditState->bCase))
{
// initial find was not successful
return;
}
do
{
GetEditCtrl().ReplaceSel(pEditState->strReplace);
} while (FindText(pEditState->strFind, 1, bCase));
ASSERT_VALID(this);
}
BOOL CEditView::InitializeReplace()
// helper to do find first if no selection
{
ASSERT_VALID(this);
_AFX_EDIT_STATE* pEditState = _afxEditState;
// do find next if no selection
int nStartChar, nEndChar;
GetEditCtrl().GetSel(nStartChar, nEndChar);
if (nStartChar == nEndChar)
{
if (!FindText(pEditState->strFind, pEditState->bNext,
pEditState->bCase))
{
// text not found
OnTextNotFound(pEditState->strFind);
}
return FALSE;
}
if (!SameAsSelected(pEditState->strFind, pEditState->bCase))
{
if (!FindText(pEditState->strFind, pEditState->bNext,
pEditState->bCase))
{
// text not found
OnTextNotFound(pEditState->strFind);
}
return FALSE;
}
ASSERT_VALID(this);
return TRUE;
}
LRESULT CEditView::OnFindReplaceCmd(WPARAM, LPARAM lParam)
{
ASSERT_VALID(this);
_AFX_EDIT_STATE* pEditState = _afxEditState;
CFindReplaceDialog* pDialog = CFindReplaceDialog::GetNotifier(lParam);
ASSERT(pDialog != NULL);
ASSERT(pDialog == pEditState->pFindReplaceDlg);
if (pDialog->IsTerminating())
{
pEditState->pFindReplaceDlg = NULL;
}
else if (pDialog->FindNext())
{
OnFindNext(pDialog->GetFindString(),
pDialog->SearchDown(), pDialog->MatchCase());
}
else if (pDialog->ReplaceCurrent())
{
ASSERT(!pEditState->bFindOnly);
OnReplaceSel(pDialog->GetFindString(),
pDialog->SearchDown(), pDialog->MatchCase(),
pDialog->GetReplaceString());
}
else if (pDialog->ReplaceAll())
{
ASSERT(!pEditState->bFindOnly);
OnReplaceAll(pDialog->GetFindString(), pDialog->GetReplaceString(),
pDialog->MatchCase());
}
ASSERT_VALID(this);
return 0;
}
typedef int (WINAPI* AFX_COMPARE_PROC)(LPCTSTR str1, LPCTSTR str2);
BOOL CEditView::SameAsSelected(LPCTSTR lpszCompare, BOOL bCase)
{
// check length first
size_t nLen = lstrlen(lpszCompare);
int nStartChar, nEndChar;
GetEditCtrl().GetSel(nStartChar, nEndChar);
if (nLen != (size_t)(nEndChar - nStartChar))
return FALSE;
// length is the same, check contents
CString strSelect;
GetSelectedText(strSelect);
return (bCase && lstrcmp(lpszCompare, strSelect) == 0) ||
(!bCase && lstrcmpi(lpszCompare, strSelect) == 0);
}
BOOL CEditView::FindText(LPCTSTR lpszFind, BOOL bNext, BOOL bCase)
{
ASSERT_VALID(this);
ASSERT(lpszFind != NULL);
ASSERT(*lpszFind != '\0');
UINT nLen = GetBufferLength();
int nStartChar, nEndChar;
GetEditCtrl().GetSel(nStartChar, nEndChar);
UINT nStart = nStartChar;
int iDir = bNext ? +1 : -1;
// can't find a match before the first character
if (nStart == 0 && iDir < 0)
return FALSE;
CWaitCursor wait;
LPCTSTR lpszText = LockBuffer();
if (iDir < 0)
{
// always go back one for search backwards
nStart -= (lpszText+nStart) -
_tcsdec(lpszText, lpszText+nStart);
}
else if (nStartChar != nEndChar && SameAsSelected(lpszFind, bCase))
{
// easy to go backward/forward with SBCS
if (_istlead(lpszText[nStart]))
nStart++;
nStart += iDir;
}
// handle search with nStart past end of buffer
size_t nLenFind = lstrlen(lpszFind);
if (nStart+nLenFind-1 >= nLen)
{
if (iDir < 0 && nLen >= nLenFind)
{
if (_afxDBCS)
{
// walk back to previous character n times
nStart = nLen;
int n = nLenFind;
while (n--)
{
nStart -= (lpszText+nStart) -
_tcsdec(lpszText, lpszText+nStart);
}
}
else
{
// single-byte character set is easy and fast
nStart = nLen - nLenFind;
}
ASSERT(nStart+nLenFind-1 <= nLen);
}
else
{
UnlockBuffer();
return FALSE;
}
}
// start the search at nStart
LPCTSTR lpsz = lpszText + nStart;
AFX_COMPARE_PROC pfnCompare = bCase ? lstrcmp : lstrcmpi;
if (_afxDBCS)
{
// double-byte string search
LPCTSTR lpszStop;
if (iDir > 0)
{
// start at current and find _first_ occurrance
lpszStop = lpszText + nLen - nLenFind + 1;
}
else
{
// start at top and find _last_ occurrance
lpszStop = lpsz;
lpsz = lpszText;
}
LPCTSTR lpszFound = NULL;
while (lpsz <= lpszStop)
{
if (!bCase || (*lpsz == *lpszFind &&
(!_istlead(*lpsz) || lpsz[1] == lpszFind[1])))
{
LPTSTR lpch = (LPTSTR)(lpsz + nLenFind);
TCHAR chSave = *lpch;
*lpch = '\0';
int nResult = (*pfnCompare)(lpsz, lpszFind);
*lpch = chSave;
if (nResult == 0)
{
lpszFound = lpsz;
if (iDir > 0)
break;
}
}
lpsz = _tcsinc(lpsz);
}
UnlockBuffer();
if (lpszFound != NULL)
{
int n = (int)(lpszFound - lpszText);
GetEditCtrl().SetSel(n, n+nLenFind);
return TRUE;
}
}
else
{
// single-byte string search
UINT nCompare;
if (iDir < 0)
nCompare = (UINT)(lpsz - lpszText) + 1;
else
nCompare = nLen - (UINT)(lpsz - lpszText) - nLenFind + 1;
while (nCompare > 0)
{
ASSERT(lpsz >= lpszText);
ASSERT(lpsz+nLenFind-1 <= lpszText+nLen-1);
LPSTR lpch = (LPSTR)(lpsz + nLenFind);
char chSave = *lpch;
*lpch = '\0';
int nResult = (*pfnCompare)(lpsz, lpszFind);
*lpch = chSave;
if (nResult == 0)
{
UnlockBuffer();
int n = (int)(lpsz - lpszText);
GetEditCtrl().SetSel(n, n+nLenFind);
ASSERT_VALID(this);
return TRUE;
}
// restore character at end of search
*lpch = chSave;
// move on to next substring
nCompare--;
lpsz += iDir;
}
UnlockBuffer();
}
ASSERT_VALID(this);
return FALSE;
}
void CEditView::OnTextNotFound(LPCTSTR)
{
ASSERT_VALID(this);
MessageBeep(0);
}
/////////////////////////////////////////////////////////////////////////////
// CEditView Tab Stops
void CEditView::SetTabStops(int nTabStops)
{
ASSERT_VALID(this);
m_nTabStops = nTabStops;
GetEditCtrl().SetTabStops(m_nTabStops);
Invalidate();
ASSERT_VALID(this);
}
/////////////////////////////////////////////////////////////////////////////
// CEditView diagnostics
#ifdef _DEBUG
void CEditView::AssertValid() const
{
CCtrlView::AssertValid();
ASSERT_VALID(&m_aPageStart);
if (m_hPrinterFont != NULL)
ASSERT_VALID(CFont::FromHandle(m_hPrinterFont));
if (m_hMirrorFont != NULL)
ASSERT_VALID(CFont::FromHandle(m_hMirrorFont));
_AFX_EDIT_STATE* pEditState = _afxEditState;
if (pEditState->pFindReplaceDlg != NULL)
ASSERT_VALID(pEditState->pFindReplaceDlg);
}
void CEditView::Dump(CDumpContext& dc) const
{
CCtrlView::Dump(dc);
dc << "m_nTabStops = " << m_nTabStops;
if (m_hPrinterFont != NULL)
dc << "\nm_hPrinterFont " << (UINT)m_hPrinterFont;
if (m_hMirrorFont != NULL)
dc << "\nm_hMirrorFont " << (UINT)m_hMirrorFont;
dc << "\nm_aPageStart: " << &m_aPageStart;
dc << "\nstatic member data:";
_AFX_EDIT_STATE* pEditState = _afxEditState;
if (pEditState->pFindReplaceDlg != NULL)
{
dc << "\npFindReplaceDlg = "
<< (void*)pEditState->pFindReplaceDlg;
dc << "\nbFindOnly = " << pEditState->bFindOnly;
}
dc << "\nstrFind = " << pEditState->strFind;
dc << "\nstrReplace = " << pEditState->strReplace;
dc << "\nbCase = " << pEditState->bCase;
dc << "\nbNext = " << pEditState->bNext;
dc << "\n";
}
#endif //_DEBUG
#ifdef AFX_INIT_SEG
#pragma code_seg(AFX_INIT_SEG)
#endif
IMPLEMENT_DYNCREATE(CEditView, CCtrlView)
#pragma warning(disable: 4074)
#pragma init_seg(lib)
PROCESS_LOCAL(_AFX_EDIT_STATE, _afxEditState)
/////////////////////////////////////////////////////////////////////////////