third-party libs

third-party/BugTrap-1.3-57bd515/source/TextView.h

@@ -0,0 +1,144 @@
+/*
+ * This is a part of the BugTrap package.
+ * Copyright (c) 2005-2009 IntelleSoft.
+ * All rights reserved.
+ *
+ * Description: Text view control class.
+ * Author: Maksim Pyatkovskiy.
+ *
+ * This source code is only intended as a supplement to the
+ * BugTrap package reference and related electronic documentation
+ * provided with the product. See these sources for detailed
+ * information regarding the BugTrap package.
+ */
+
+#pragma once
+
+#include "Array.h"
+#include "Encoding.h"
+
+/// Text view control class.
+class CTextView
+{
+public:
+	/// Initialize the object.
+	CTextView(void);
+	/// De-initialize the object.
+	~CTextView(void);
+	/// Attach text view object to window handle.
+	void Attach(HWND hwnd);
+	/// Detach text view object to window handle.
+	void Detach(void);
+	/// Set file information.
+	void SetFile(HANDLE hFile, TEXT_ENCODING eEncoding, DWORD dwSignatureSize);
+	/// Reset file information.
+	void ResetFile(void);
+	/// Get file handle.
+	HANDLE GetFileHandle(void) const;
+	/// Get file encoding.
+	TEXT_ENCODING GetEncoding(void) const;
+
+	enum
+	{
+		/// Maximum number of symbols in the line.
+		MAX_NUMBER_OF_SYMBOLS = 300,
+		/// Approximated average number of symbols in the line.
+		APROX_NUMBER_OF_SYMBOLS = 30,
+		/// Size of text buffer in characters.
+		TEXT_CACHE_SIZE = 40000,
+		/// Size of line buffer in bytes.
+		LINE_BUFFER_SIZE = 40000
+	};
+
+private:
+	/// Protect the class from being accidentally copied.
+	CTextView(const CTextView& rTextView);
+	/// Protect the class from being accidentally copied.
+	CTextView& operator=(const CTextView& rTextView);
+	/// Window procedure of text view window.
+	static LRESULT CALLBACK TextViewWndProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
+	/// Draw window client area.
+	void DrawTextView(HDC hdc, const RECT* prcPaint);
+	/// Resize text view client area.
+	void ResizeTextView(BOOL bIgnoreScrollPos);
+	/// Scroll text view client area.
+	void ScrollTextView(int nScrollBarType, int nScrollCode);
+	/// Initialize variables.
+	void InitVars(void);
+	/// Load line numbers info.
+	void CountLines(void);
+	/// Load cache from file.
+	void LoadCache(void);
+	/// Load line to the cache.
+	BOOL CacheLine(DWORD dwCachedLineNum, HDC hdc, const TEXTMETRIC& tmetr);
+	/// Get current font metrics.
+	void GetTextMetrics(PTEXTMETRIC pTextMetric);
+
+	/// Line information.
+	struct CLineInfo
+	{
+		/// Line offset in file.
+		DWORD m_dwLineStart;
+		/// Text offset in cache.
+		DWORD m_dwTextStart;
+		/// Line length in characters.
+		DWORD m_dwLength;
+		/// Line length in bytes.
+		DWORD m_dwSize;
+		/// True if line was truncated.
+		BOOL m_bTruncated;
+	};
+
+	/// Line numbers info.
+	CArray<CLineInfo> m_arrLines;
+	/// File handle.
+	HANDLE m_hFile;
+	/// Text decoder.
+	CBaseDecoder* m_pDecoder;
+	/// Window handle.
+	HWND m_hwnd;
+	/// Old static window procedure.
+	WNDPROC m_pfnOldTextViewWndProc;
+	/// Number of first cache lined.
+	DWORD m_dwFirstCachedLine;
+	/// Number of lines stored in cache.
+	DWORD m_dwNumCachedLines;
+	/// Pointer to the cache.
+	PTCHAR m_pTextCache;
+	/// Size of line buffer in bytes.
+	DWORD m_dwLineBufferSize;
+	/// Pointer to the line buffer.
+	PBYTE m_pLineBuffer;
+	/// Old window style.
+	LONG m_lOldStyle;
+	/// Maximum line width.
+	int m_nMaxLineWidth;
+	/// Number of wheel lines.
+	int m_nWheelLines;
+};
+
+inline CTextView::CTextView(void) : m_arrLines(0), m_pTextCache(NULL), m_pLineBuffer(NULL)
+{
+	InitVars();
+}
+
+inline CTextView::~CTextView(void)
+{
+	ResetFile();
+}
+
+/**
+ * @return file handle.
+ */
+inline HANDLE CTextView::GetFileHandle(void) const
+{
+	return m_hFile;
+}
+
+/**
+ * @return text encoding.
+ */
+inline TEXT_ENCODING CTextView::GetEncoding(void) const
+{
+	return (m_pDecoder ? m_pDecoder->GetEncoding() : TXTENC_ANSI);
+}