www.pudn.com > c02 vc6.rar > CCrystalTextBuffer.h
////////////////////////////////////////////////////////////////////////////
// File: CCrystalTextBuffer.h
// Version: 1.0.0.0
// Created: 29-Dec-1998
//
// Author: Stcherbatchenko Andrei
// E-mail: windfall@gmx.de
//
// Interface of the CCrystalTextBuffer 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
////////////////////////////////////////////////////////////////////////////
#if !defined(AFX_CCRYSTALTEXTBUFFER_H__AD7F2F49_6CB3_11D2_8C32_0080ADB86836__INCLUDED_)
#define AFX_CCRYSTALTEXTBUFFER_H__AD7F2F49_6CB3_11D2_8C32_0080ADB86836__INCLUDED_
#if _MSC_VER >= 1000
#pragma once
#endif // _MSC_VER >= 1000
#include "cedefs.h"
#include "CCrystalTextView.h"
#ifndef __AFXTEMPL_H__
#pragma message("Include in your stdafx.h to avoid this message")
#include
#endif
#define UNDO_DESCRIP_BUF 32
enum LINEFLAGS
{
LF_BOOKMARK_FIRST = 0x00000001L,
LF_EXECUTION = 0x00010000L,
LF_BREAKPOINT = 0x00020000L,
LF_COMPILATION_ERROR = 0x00040000L,
LF_BOOKMARKS = 0x00080000L,
LF_INVALID_BREAKPOINT = 0x00100000L
};
#define LF_BOOKMARK(id) (LF_BOOKMARK_FIRST << id)
enum CRLFSTYLE
{
CRLF_STYLE_AUTOMATIC = -1,
CRLF_STYLE_DOS = 0,
CRLF_STYLE_UNIX = 1,
CRLF_STYLE_MAC = 2
};
enum
{
CE_ACTION_UNKNOWN = 0,
CE_ACTION_PASTE = 1,
CE_ACTION_DELSEL = 2,
CE_ACTION_CUT = 3,
CE_ACTION_TYPING = 4,
CE_ACTION_BACKSPACE = 5,
CE_ACTION_INDENT = 6,
CE_ACTION_DRAGDROP = 7,
CE_ACTION_REPLACE = 8,
CE_ACTION_DELETE = 9,
CE_ACTION_AUTOINDENT = 10
// ...
// Expandable: user actions allowed
};
/////////////////////////////////////////////////////////////////////////////
// CUpdateContext class
class CUpdateContext
{
public:
virtual void RecalcPoint(CPoint &ptPoint) = 0;
};
/////////////////////////////////////////////////////////////////////////////
// CCrystalTextBuffer command target
class CRYSEDIT_CLASS_DECL CCrystalTextBuffer : public CCmdTarget
{
DECLARE_DYNCREATE(CCrystalTextBuffer)
private:
BOOL m_bInit;
BOOL m_bReadOnly;
BOOL m_bModified;
int m_nCRLFMode;
BOOL m_bCreateBackupFile;
int m_nUndoBufSize;
int FindLineWithFlag(DWORD dwFlag);
protected:
#pragma pack(push, 1)
// Nested class declarations
struct SLineInfo
{
TCHAR *m_pcLine;
int m_nLength, m_nMax;
DWORD m_dwFlags;
SLineInfo() { memset(this, 0, sizeof(SLineInfo)); };
};
enum
{
UNDO_INSERT = 0x0001,
UNDO_BEGINGROUP = 0x0100
};
// [JRT] Support For Descriptions On Undo/Redo Actions
struct SUndoRecord
{
DWORD m_dwFlags;
CPoint m_ptStartPos, m_ptEndPos; // Block of text participating
int m_nAction; // For information only: action type
private:
// TCHAR *m_pcText;
// Since in most cases we have 1 character here,
// we should invent a better way. Note: 2 * sizeof(WORD) <= sizeof(TCHAR*)
//
// Here we will use the following trick: on Win32 platforms high-order word
// of any pointer will be != 0. So we can store 1 character strings without
// allocating memory.
//
union
{
TCHAR *m_pszText; // For cases when we have > 1 character strings
TCHAR m_szText[2]; // For single-character strings
};
public:
// constructor/destructor for this struct
SUndoRecord() { memset(this, 0, sizeof(SUndoRecord)); };
void SetText(LPCTSTR pszText);
void FreeText();
LPCTSTR GetText() const
{
if (HIWORD((DWORD) m_pszText) != 0)
return m_pszText;
return m_szText;
};
};
#pragma pack(pop)
class CInsertContext : public CUpdateContext
{
public:
CPoint m_ptStart, m_ptEnd;
virtual void RecalcPoint(CPoint &ptPoint);
};
class CDeleteContext : public CUpdateContext
{
public:
CPoint m_ptStart, m_ptEnd;
virtual void RecalcPoint(CPoint &ptPoint);
};
// Lines of text
CArray m_aLines;
// Undo
CArray m_aUndoBuf;
int m_nUndoPosition;
int m_nSyncPosition;
BOOL m_bUndoGroup, m_bUndoBeginGroup;
// Connected views
CList m_lpViews;
// Helper methods
void InsertLine(LPCTSTR pszLine, int nLength = -1, int nPosition = -1);
void AppendLine(int nLineIndex, LPCTSTR pszChars, int nLength = -1);
// Implementation
BOOL InternalInsertText(CCrystalTextView *pSource, int nLine, int nPos, LPCTSTR pszText, int &nEndLine, int &nEndChar);
BOOL InternalDeleteText(CCrystalTextView *pSource, int nStartLine, int nStartPos, int nEndLine, int nEndPos);
// [JRT] Support For Descriptions On Undo/Redo Actions
void AddUndoRecord(BOOL bInsert, const CPoint &ptStartPos, const CPoint &ptEndPos,
LPCTSTR pszText, int nActionType = CE_ACTION_UNKNOWN);
// Overridable: provide action description
virtual BOOL GetActionDescription(int nAction, CString &desc);
// Operations
public:
// Construction/destruction code
CCrystalTextBuffer();
~CCrystalTextBuffer();
// Basic functions
BOOL InitNew(int nCrlfStyle = CRLF_STYLE_DOS);
BOOL LoadFromFile(LPCTSTR pszFileName, int nCrlfStyle = CRLF_STYLE_AUTOMATIC);
BOOL SaveToFile(LPCTSTR pszFileName, int nCrlfStyle = CRLF_STYLE_AUTOMATIC, BOOL bClearModifiedFlag = TRUE);
void FreeAll();
// 'Dirty' flag
virtual void SetModified(BOOL bModified = TRUE);
BOOL IsModified() const;
// Connect/disconnect views
void AddView(CCrystalTextView *pView);
void RemoveView(CCrystalTextView *pView);
// Text access functions
int GetLineCount();
int GetLineLength(int nLine);
LPTSTR GetLineChars(int nLine);
DWORD GetLineFlags(int nLine);
int GetLineWithFlag(DWORD dwFlag);
void SetLineFlag(int nLine, DWORD dwFlag, BOOL bSet, BOOL bRemoveFromPreviousLine = TRUE);
void GetText(int nStartLine, int nStartChar, int nEndLine, int nEndChar, CString &text, LPCTSTR pszCRLF = NULL);
// Attributes
int GetCRLFMode();
void SetCRLFMode(int nCRLFMode);
BOOL GetReadOnly() const;
void SetReadOnly(BOOL bReadOnly = TRUE);
// Text modification functions
BOOL InsertText(CCrystalTextView *pSource, int nLine, int nPos, LPCTSTR pszText, int &nEndLine, int &nEndChar, int nAction = CE_ACTION_UNKNOWN);
BOOL DeleteText(CCrystalTextView *pSource, int nStartLine, int nStartPos, int nEndLine, int nEndPos, int nAction = CE_ACTION_UNKNOWN);
// Undo/Redo
BOOL CanUndo();
BOOL CanRedo();
BOOL Undo(CPoint &ptCursorPos);
BOOL Redo(CPoint &ptCursorPos);
// Undo grouping
void BeginUndoGroup(BOOL bMergeWithPrevious = FALSE);
void FlushUndoGroup(CCrystalTextView *pSource);
// Browse undo sequence
POSITION GetUndoDescription(CString &desc, POSITION pos = NULL);
POSITION GetRedoDescription(CString &desc, POSITION pos = NULL);
// Notify all connected views about changes in text
void UpdateViews(CCrystalTextView *pSource, CUpdateContext *pContext,
DWORD dwUpdateFlags, int nLineIndex = -1);
// More bookmarks
int FindNextBookmarkLine(int nCurrentLine = 0);
int FindPrevBookmarkLine(int nCurrentLine = 0);
// Overrides
// ClassWizard generated virtual function overrides
//{{AFX_VIRTUAL(CCrystalTextBuffer)
//}}AFX_VIRTUAL
// Implementation
protected:
// Generated message map functions
//{{AFX_MSG(CCrystalTextBuffer)
//}}AFX_MSG
DECLARE_MESSAGE_MAP()
};
#if ! (defined(CE_FROM_DLL) || defined(CE_DLL_BUILD))
#include "CCrystalTextBuffer.inl"
#endif
/////////////////////////////////////////////////////////////////////////////
//{{AFX_INSERT_LOCATION}}
// Microsoft Developer Studio will insert additional declarations immediately before the previous line.
#endif // !defined(AFX_CCRYSTALTEXTBUFFER_H__AD7F2F49_6CB3_11D2_8C32_0080ADB86836__INCLUDED_)