ccrystaltextview2.cpp

一个完整的编辑器的代码（很值得参考

////////////////////////////////////////////////////////////////////////////
//  File:       ccrystaltextview2.cpp
//  Version:    1.0.0.0
//  Created:    29-Dec-1998
//
//  Author:     Stcherbatchenko Andrei
//  E-mail:     [e-mail]
//
//  Implementation of the CCrystalTextView class, a part of Crystal Edit -
//  syntax coloring text editor.
//
//  You are free to use or modify this code to the following restrictions:
//  - Acknowledge me somewhere in your about box, simple "Parts of code by.."
//  will be enough. If you can't (or don't want to), contact me personally.
//  - LEAVE THIS HEADER INTACT
////////////////////////////////////////////////////////////////////////////

////////////////////////////////////////////////////////////////////////////
//	21-Feb-99
//		Paul Selormey, James R. Twine:
//	+	FEATURE: description for Undo/Redo actions
//	+	FEATURE: multiple MSVC-like bookmarks
//	+	FEATURE: 'Disable backspace at beginning of line' option
//	+	FEATURE: 'Disable drag-n-drop editing' option
////////////////////////////////////////////////////////////////////////////

////////////////////////////////////////////////////////////////////////////
//  19-Jul-99
//      Ferdinand Prantl:
//  +   FEATURE: regular expressions, go to line and things ...
//  +   FEATURE: plenty of syntax highlighting definitions
//  +   FEATURE: corrected bug in syntax highlighting C comments
//  +   FEATURE: extended registry support for saving settings
//  +   FEATURE: some other things I've forgotten ...
//
//  ... it's being edited very rapidly so sorry for non-commented
//        and maybe "ugly" code ...
////////////////////////////////////////////////////////////////////////////

#include "stdafx.h"
#include "editcmd.h"
#include "ccrystaltextview.h"
#include "ccrystaltextbuffer.h"
#include <malloc.h>

#ifndef __AFXPRIV_H__
#pragma message("Include <afxpriv.h> in your stdafx.h to avoid this message")
#include <afxpriv.h>
#endif

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

#define CRYSTAL_TIMER_DRAGSEL   1001


/////////////////////////////////////////////////////////////////////////////
// CCrystalTextView

void CCrystalTextView::
MoveLeft (BOOL bSelect)
{
  PrepareSelBounds ();
  if (m_ptDrawSelStart != m_ptDrawSelEnd && !bSelect)
    {
      m_ptCursorPos = m_ptDrawSelStart;
    }
  else
    {
      if (m_ptCursorPos.x == 0)
        {
          if (m_ptCursorPos.y > 0)
            {
              m_ptCursorPos.y--;
              m_ptCursorPos.x = GetLineLength (m_ptCursorPos.y);
            }
        }
      else
        {
          m_ptCursorPos.x--;
          if (m_pTextBuffer->IsMBSTrail (m_ptCursorPos.y, m_ptCursorPos.x) &&
                // here... if its a MBSTrail, then should move one character more....
                m_ptCursorPos.x > 0)
            m_ptCursorPos.x--;
        }
    }
  m_nIdealCharPos = CalculateActualOffset (m_ptCursorPos.y, m_ptCursorPos.x);
  EnsureVisible (m_ptCursorPos);
  UpdateCaret ();
  if (!bSelect)
    m_ptAnchor = m_ptCursorPos;
  SetSelection (m_ptAnchor, m_ptCursorPos);
}

void CCrystalTextView::
MoveRight (BOOL bSelect)
{
  PrepareSelBounds ();
  if (m_ptDrawSelStart != m_ptDrawSelEnd && !bSelect)
    {
      m_ptCursorPos = m_ptDrawSelEnd;
    }
  else
    {
      if (m_ptCursorPos.x == GetLineLength (m_ptCursorPos.y))
        {
          if (m_ptCursorPos.y < GetLineCount () - 1)
            {
              m_ptCursorPos.y++;
              m_ptCursorPos.x = 0;
            }
        }
      else
        {
          m_ptCursorPos.x++;
          if (m_pTextBuffer->IsMBSTrail (m_ptCursorPos.y, m_ptCursorPos.x) &&
                // here... if its a MBSTrail, then should move one character more....
                m_ptCursorPos.x < GetLineLength (m_ptCursorPos.y))
            m_ptCursorPos.x++;
        }
    }
  m_nIdealCharPos = CalculateActualOffset (m_ptCursorPos.y, m_ptCursorPos.x);
  EnsureVisible (m_ptCursorPos);
  UpdateCaret ();
  if (!bSelect)
    m_ptAnchor = m_ptCursorPos;
  SetSelection (m_ptAnchor, m_ptCursorPos);
}

void CCrystalTextView::
MoveWordLeft (BOOL bSelect)
{
  PrepareSelBounds ();
  if (m_ptDrawSelStart != m_ptDrawSelEnd && !bSelect)
    {
      MoveLeft (bSelect);
      return;
    }

  if (m_ptCursorPos.x == 0)
    {
      if (m_ptCursorPos.y == 0)
        return;
      m_ptCursorPos.y--;
      m_ptCursorPos.x = GetLineLength (m_ptCursorPos.y);
    }

  LPCTSTR pszChars = GetLineChars (m_ptCursorPos.y);
  int nPos = m_ptCursorPos.x;
  while (nPos > 0 && isspace (pszChars[nPos - 1]))
    nPos--;

  if (nPos > 0)
    {
      nPos--;
      if (xisalnum (pszChars[nPos]))
        {
          while (nPos > 0 && xisalnum (pszChars[nPos - 1]))
            nPos--;
        }
      else
        {
          while (nPos > 0 && !xisalnum (pszChars[nPos - 1])
                && !isspace (pszChars[nPos - 1]))
            nPos--;
        }
    }

  m_ptCursorPos.x = nPos;
  m_nIdealCharPos = CalculateActualOffset (m_ptCursorPos.y, m_ptCursorPos.x);
  EnsureVisible (m_ptCursorPos);
  UpdateCaret ();
  if (!bSelect)
    m_ptAnchor = m_ptCursorPos;
  SetSelection (m_ptAnchor, m_ptCursorPos);
}

void CCrystalTextView::
MoveWordRight (BOOL bSelect)
{
  PrepareSelBounds ();
  if (m_ptDrawSelStart != m_ptDrawSelEnd && !bSelect)
    {
      MoveRight (bSelect);
      return;
    }

  if (m_ptCursorPos.x == GetLineLength (m_ptCursorPos.y))
    {
      if (m_ptCursorPos.y == GetLineCount () - 1)
        return;
      m_ptCursorPos.y++;
      m_ptCursorPos.x = 0;
    }

  int nLength = GetLineLength (m_ptCursorPos.y);
  if (m_ptCursorPos.x == nLength)
    {
      MoveRight (bSelect);
      return;
    }

  LPCTSTR pszChars = GetLineChars (m_ptCursorPos.y);
  int nPos = m_ptCursorPos.x;
  if (xisalnum (pszChars[nPos]))
    {
      while (nPos < nLength && xisalnum (pszChars[nPos]))
        nPos++;
    }
  else
    {
      while (nPos < nLength && !xisalnum (pszChars[nPos])
            && !isspace (pszChars[nPos]))
        nPos++;
    }

  while (nPos < nLength && isspace (pszChars[nPos]))
    nPos++;

  m_ptCursorPos.x = nPos;
  m_nIdealCharPos = CalculateActualOffset (m_ptCursorPos.y, m_ptCursorPos.x);
  EnsureVisible (m_ptCursorPos);
  UpdateCaret ();
  if (!bSelect)
    m_ptAnchor = m_ptCursorPos;
  SetSelection (m_ptAnchor, m_ptCursorPos);
}

void CCrystalTextView::
MoveUp (BOOL bSelect)
{
  PrepareSelBounds ();
  if (m_ptDrawSelStart != m_ptDrawSelEnd && !bSelect)
    m_ptCursorPos = m_ptDrawSelStart;

	//BEGIN SW
	CPoint	subLinePos;
	CharPosToPoint( m_ptCursorPos.y, m_ptCursorPos.x, subLinePos );

	int			nSubLine = GetSubLineIndex( m_ptCursorPos.y ) + subLinePos.y;

	if( nSubLine > 0 )
	/*ORIGINAL
	if (m_ptCursorPos.y > 0)
	*///END SW
    {
      if (m_nIdealCharPos == -1)
        m_nIdealCharPos = CalculateActualOffset (m_ptCursorPos.y, m_ptCursorPos.x);
		//BEGIN SW
		SubLineCursorPosToTextPos( CPoint( m_nIdealCharPos, nSubLine - 1 ), m_ptCursorPos );
		/*ORIGINAL
		m_ptCursorPos.y --;
		m_ptCursorPos.x = ApproxActualOffset(m_ptCursorPos.y, m_nIdealCharPos);
		*///END SW
      if (m_ptCursorPos.x > GetLineLength (m_ptCursorPos.y))
        m_ptCursorPos.x = GetLineLength (m_ptCursorPos.y);
    }
  EnsureVisible (m_ptCursorPos);
  UpdateCaret ();
  if (!bSelect)
    m_ptAnchor = m_ptCursorPos;
  SetSelection (m_ptAnchor, m_ptCursorPos);
}

void CCrystalTextView::
MoveDown (BOOL bSelect)
{
  PrepareSelBounds ();
  if (m_ptDrawSelStart != m_ptDrawSelEnd && !bSelect)
    m_ptCursorPos = m_ptDrawSelEnd;

	//BEGIN SW
	CPoint	subLinePos;
	CharPosToPoint( m_ptCursorPos.y, m_ptCursorPos.x, subLinePos );

	int			nSubLine = GetSubLineIndex( m_ptCursorPos.y ) + subLinePos.y;

	if( nSubLine < GetSubLineCount() - 1 )
	/*ORIGINAL
	if (m_ptCursorPos.y < GetLineCount() - 1)
	*/
    {
      if (m_nIdealCharPos == -1)
        m_nIdealCharPos = CalculateActualOffset (m_ptCursorPos.y, m_ptCursorPos.x);
		//BEGIN SW
		SubLineCursorPosToTextPos( CPoint( m_nIdealCharPos, nSubLine + 1 ), m_ptCursorPos );
		/*ORIGINAL
		m_ptCursorPos.y ++;
		m_ptCursorPos.x = ApproxActualOffset(m_ptCursorPos.y, m_nIdealCharPos);
		*///END SW
      if (m_ptCursorPos.x > GetLineLength (m_ptCursorPos.y))
        m_ptCursorPos.x = GetLineLength (m_ptCursorPos.y);
    }
  EnsureVisible (m_ptCursorPos);
  UpdateCaret ();
  if (!bSelect)
    m_ptAnchor = m_ptCursorPos;
  SetSelection (m_ptAnchor, m_ptCursorPos);
}

void CCrystalTextView::
MoveHome (BOOL bSelect)
{
  int nLength = GetLineLength (m_ptCursorPos.y);
  LPCTSTR pszChars = GetLineChars (m_ptCursorPos.y);
	//BEGIN SW
	CPoint	pos;
	CharPosToPoint( m_ptCursorPos.y, m_ptCursorPos.x, pos );
	int nHomePos = SubLineHomeToCharPos( m_ptCursorPos.y, pos.y );
	int nOriginalHomePos = nHomePos;
	/*ORIGINAL
	int nHomePos = 0;
	*///END SW
  while (nHomePos < nLength && isspace (pszChars[nHomePos]))
    nHomePos++;
  if (nHomePos == nLength || m_ptCursorPos.x == nHomePos)
		//BEGIN SW
		m_ptCursorPos.x = nOriginalHomePos;
		/*ORIGINAL
		m_ptCursorPos.x = 0;
		*///END SW
  else
    m_ptCursorPos.x = nHomePos;
  m_nIdealCharPos = CalculateActualOffset (m_ptCursorPos.y, m_ptCursorPos.x);
  EnsureVisible (m_ptCursorPos);
  UpdateCaret ();
  if (!bSelect)
    m_ptAnchor = m_ptCursorPos;
  SetSelection (m_ptAnchor, m_ptCursorPos);
}

void CCrystalTextView::
MoveEnd (BOOL bSelect)
{
	//BEGIN SW
	CPoint	pos;
	CharPosToPoint( m_ptCursorPos.y, m_ptCursorPos.x, pos );
	m_ptCursorPos.x = SubLineEndToCharPos( m_ptCursorPos.y, pos.y );
	/*ORIGINAL
	m_ptCursorPos.x = GetLineLength(m_ptCursorPos.y);
	*///END SW
  m_nIdealCharPos = CalculateActualOffset (m_ptCursorPos.y, m_ptCursorPos.x);
  EnsureVisible (m_ptCursorPos);
  UpdateCaret ();
  if (!bSelect)
    m_ptAnchor = m_ptCursorPos;
  SetSelection (m_ptAnchor, m_ptCursorPos);
}

void CCrystalTextView::
MovePgUp (BOOL bSelect)
{
	//BEGIN SW
	// scrolling windows
	int nNewTopSubLine = m_nTopSubLine - GetScreenLines() + 1;
	if (nNewTopSubLine < 0)
		nNewTopSubLine = 0;
	if (m_nTopSubLine != nNewTopSubLine)
	{
		ScrollToSubLine(nNewTopSubLine);
		UpdateSiblingScrollPos(TRUE);
	}

	// setting cursor
	CPoint	subLinePos;
	CharPosToPoint( m_ptCursorPos.y, m_ptCursorPos.x, subLinePos );

	int			nSubLine = GetSubLineIndex( m_ptCursorPos.y ) + subLinePos.y - GetScreenLines() + 1;

	if( nSubLine < 0 )
		nSubLine = 0;

	SubLineCursorPosToTextPos( 
		CPoint( m_nIdealCharPos, nSubLine ), m_ptCursorPos );

	/*ORIGINAL
	int nNewTopLine = m_nTopLine - GetScreenLines() + 1;
	if (nNewTopLine < 0)
		nNewTopLine = 0;
	if (m_nTopLine != nNewTopLine)
	{
		ScrollToLine(nNewTopLine);
		UpdateSiblingScrollPos(TRUE);
	}

	m_ptCursorPos.y -= GetScreenLines() - 1;
	if (m_ptCursorPos.y < 0)
		m_ptCursorPos.y = 0;
	if (m_ptCursorPos.x > GetLineLength(m_ptCursorPos.y))
		m_ptCursorPos.x = GetLineLength(m_ptCursorPos.y);
	*///END SW
  m_nIdealCharPos = CalculateActualOffset (m_ptCursorPos.y, m_ptCursorPos.x);
  EnsureVisible (m_ptCursorPos);    //todo: no vertical scroll

  UpdateCaret ();
  if (!bSelect)
    m_ptAnchor = m_ptCursorPos;
  SetSelection (m_ptAnchor, m_ptCursorPos);
}

void CCrystalTextView::
MovePgDn (BOOL bSelect)