144 lines
3.6 KiB
C++
144 lines
3.6 KiB
C++
/*
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* This is a part of the BugTrap package.
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* Copyright (c) 2005-2009 IntelleSoft.
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* All rights reserved.
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*
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* Description: Text view control class.
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* Author: Maksim Pyatkovskiy.
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*
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* This source code is only intended as a supplement to the
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* BugTrap package reference and related electronic documentation
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* provided with the product. See these sources for detailed
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* information regarding the BugTrap package.
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*/
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#pragma once
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#include "Array.h"
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#include "Encoding.h"
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/// Text view control class.
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class CTextView
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{
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public:
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/// Initialize the object.
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CTextView(void);
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/// De-initialize the object.
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~CTextView(void);
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/// Attach text view object to window handle.
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void Attach(HWND hwnd);
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/// Detach text view object to window handle.
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void Detach(void);
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/// Set file information.
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void SetFile(HANDLE hFile, TEXT_ENCODING eEncoding, DWORD dwSignatureSize);
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/// Reset file information.
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void ResetFile(void);
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/// Get file handle.
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HANDLE GetFileHandle(void) const;
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/// Get file encoding.
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TEXT_ENCODING GetEncoding(void) const;
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enum
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{
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/// Maximum number of symbols in the line.
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MAX_NUMBER_OF_SYMBOLS = 300,
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/// Approximated average number of symbols in the line.
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APROX_NUMBER_OF_SYMBOLS = 30,
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/// Size of text buffer in characters.
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TEXT_CACHE_SIZE = 40000,
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/// Size of line buffer in bytes.
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LINE_BUFFER_SIZE = 40000
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};
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private:
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/// Protect the class from being accidentally copied.
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CTextView(const CTextView& rTextView);
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/// Protect the class from being accidentally copied.
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CTextView& operator=(const CTextView& rTextView);
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/// Window procedure of text view window.
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static LRESULT CALLBACK TextViewWndProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
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/// Draw window client area.
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void DrawTextView(HDC hdc, const RECT* prcPaint);
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/// Resize text view client area.
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void ResizeTextView(BOOL bIgnoreScrollPos);
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/// Scroll text view client area.
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void ScrollTextView(int nScrollBarType, int nScrollCode);
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/// Initialize variables.
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void InitVars(void);
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/// Load line numbers info.
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void CountLines(void);
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/// Load cache from file.
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void LoadCache(void);
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/// Load line to the cache.
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BOOL CacheLine(DWORD dwCachedLineNum, HDC hdc, const TEXTMETRIC& tmetr);
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/// Get current font metrics.
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void GetTextMetrics(PTEXTMETRIC pTextMetric);
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/// Line information.
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struct CLineInfo
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{
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/// Line offset in file.
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DWORD m_dwLineStart;
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/// Text offset in cache.
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DWORD m_dwTextStart;
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/// Line length in characters.
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DWORD m_dwLength;
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/// Line length in bytes.
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DWORD m_dwSize;
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/// True if line was truncated.
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BOOL m_bTruncated;
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};
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/// Line numbers info.
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CArray<CLineInfo> m_arrLines;
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/// File handle.
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HANDLE m_hFile;
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/// Text decoder.
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CBaseDecoder* m_pDecoder;
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/// Window handle.
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HWND m_hwnd;
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/// Old static window procedure.
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WNDPROC m_pfnOldTextViewWndProc;
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/// Number of first cache lined.
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DWORD m_dwFirstCachedLine;
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/// Number of lines stored in cache.
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DWORD m_dwNumCachedLines;
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/// Pointer to the cache.
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PTCHAR m_pTextCache;
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/// Size of line buffer in bytes.
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DWORD m_dwLineBufferSize;
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/// Pointer to the line buffer.
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PBYTE m_pLineBuffer;
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/// Old window style.
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LONG m_lOldStyle;
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/// Maximum line width.
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int m_nMaxLineWidth;
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/// Number of wheel lines.
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int m_nWheelLines;
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};
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inline CTextView::CTextView(void) : m_arrLines(0), m_pTextCache(NULL), m_pLineBuffer(NULL)
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{
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InitVars();
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}
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inline CTextView::~CTextView(void)
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{
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ResetFile();
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}
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/**
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* @return file handle.
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*/
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inline HANDLE CTextView::GetFileHandle(void) const
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{
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return m_hFile;
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}
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/**
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* @return text encoding.
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*/
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inline TEXT_ENCODING CTextView::GetEncoding(void) const
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{
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return (m_pDecoder ? m_pDecoder->GetEncoding() : TXTENC_ANSI);
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}
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