textviewinternal.h

支持Unicode及Uniscribe的多语言输入的文本编辑器源码。

#ifndef TEXTVIEW_INTERNAL_INCLUDED
#define TEXTVIEW_INTERNAL_INCLUDED

#define TEXTBUFSIZE  128
#define LINENO_FMT  _T(" %2d ")
#define LINENO_PAD	 8

#include <commctrl.h>
#include <uxtheme.h>

/*HTHEME  (WINAPI * OpenThemeData_Proc)(HWND hwnd, LPCWSTR pszClassList);
BOOL    (WINAPI * CloseThemeData_Proc)(HTHEME hTheme);
HRESULT (WINAPI * DrawThemeBackground_Proc)(HTHEME hTheme, HDC hdc, int, int, const RECT*, const RECT*);
*/


#include "TextDocument.h"

#include "..\UspLib\usplib.h"

typedef struct
{
	USPDATA *uspData;
	ULONG	 lineno;		// line#
	ULONG	 offset;		// offset (in WCHAR's) of this line
	ULONG	 usage;			// cache-count

	int		 length;		// length in chars INCLUDING CR/LF
	int		 length_CRLF;	// length in chars EXCLUDING CR/LF

} USPCACHE;

typedef const SCRIPT_LOGATTR CSCRIPT_LOGATTR;

#define USP_CACHE_SIZE 200

//
//	LINEINFO - information about a specific line
//
typedef struct
{
	ULONG	nLineNo;
	int		nImageIdx;

	// more here in the future?

} LINEINFO;

typedef int (__cdecl * COMPAREPROC) (const void *, const void *);

// maximum number of lines that we can hold info for at one time
#define MAX_LINE_INFO 128	

// maximum fonts that a TextView can hold
#define MAX_FONTS 32

enum SELMODE { SEL_NONE, SEL_NORMAL, SEL_MARGIN, SEL_BLOCK };

typedef struct
{
	ULONG	line;
	ULONG	xpos;

} CURPOS;

//
//	TextView - internal window implementation
//
class TextView
{
public:

	TextView(HWND hwnd);
	~TextView();

	LONG WINAPI WndProc(UINT msg, WPARAM wParam, LPARAM lParam);

private:

	//
	//	Message handlers
	//
	LONG OnPaint();
	LONG OnNcPaint(HRGN hrgnUpdate);
	LONG OnSetFont(HFONT hFont);
	LONG OnSize(UINT nFlags, int width, int height);
	LONG OnVScroll(UINT nSBCode, UINT nPos);
	LONG OnHScroll(UINT nSBCode, UINT nPos);
	LONG OnMouseWheel(int nDelta);
	LONG OnTimer(UINT nTimer);

	LONG OnMouseActivate(HWND hwndTop, UINT nHitTest, UINT nMessage);
	LONG OnContextMenu(HWND wParam, int x, int y);

	LONG OnLButtonDown(UINT nFlags, int x, int y);
	LONG OnLButtonUp(UINT nFlags, int x, int y);
	LONG OnLButtonDblClick(UINT nFlags, int x, int y);
	LONG OnMouseMove(UINT nFlags, int x, int y);

	LONG OnKeyDown(UINT nKeyCode, UINT nFlags);
	LONG OnChar(UINT nChar, UINT nFlags);

	LONG OnSetFocus(HWND hwndOld);
	LONG OnKillFocus(HWND hwndNew);

	BOOL OnCut();
	BOOL OnCopy();
	BOOL OnPaste();
	BOOL OnClear();
	
private:

	//
	//	Internal private functions
	//
	LONG		OpenFile(TCHAR *szFileName);
	LONG		ClearFile();
	void		ResetLineCache();
	ULONG		GetText(TCHAR *szDest, ULONG nStartOffset, ULONG nLength);
	
	//
	//	Cursor/Selection
	//
	ULONG		SelectionSize();
	ULONG		SelectAll();

	//void		Toggle


	//
	//	Painting support
	//
	void		RefreshWindow();
	void		PaintLine(HDC hdc, ULONG line, int x, int y, HRGN hrgnUpdate);
	void		PaintText(HDC hdc, ULONG nLineNo, int x, int y, RECT *bounds);
	int			PaintMargin(HDC hdc, ULONG line, int x, int y);

	LONG		InvalidateRange(ULONG nStart, ULONG nFinish);
	LONG		InvalidateLine(ULONG nLineNo, bool forceAnalysis);
	VOID		UpdateLine(ULONG nLineNo);

	
	int			ApplyTextAttributes(ULONG nLineNo, ULONG offset, ULONG &nColumn, TCHAR *szText, int nTextLen, ATTR *attr);
	int			ApplySelection(USPDATA *uspData, ULONG nLineNo, ULONG nOffset, ULONG nTextLen);
	int			SyntaxColour(TCHAR *szText, ULONG nTextLen, ATTR *attr);
	int			StripCRLF(TCHAR *szText, ATTR *attrList, int nLength, bool fAllow);
	void		MarkCRLF(USPDATA *uspData, TCHAR *szText, int nLength, ATTR *attr);
	int			CRLF_size(TCHAR *szText, int nLength);

	//
	//	Font support
	//
	LONG		AddFont(HFONT);
	LONG		SetFont(HFONT, int idx);
	LONG		SetLineSpacing(int nAbove, int nBelow);
	LONG		SetLongLine(int nLength);
	
	//
	//	
	//
	int			NeatTextYOffset(USPFONT *font);
	int			TextWidth(HDC hdc, TCHAR *buf, int len);
	//int		TabWidth();
	int			LeftMarginWidth();
	void		UpdateMarginWidth();
	int			SetCaretWidth(int nWidth);
	BOOL		SetImageList(HIMAGELIST hImgList);
	int			SetLineImage(ULONG nLineNo, ULONG nImageIdx);
	LINEINFO *	GetLineInfo(ULONG nLineNo);

	//
	//	Caret/Cursor positioning
	//
	BOOL		MouseCoordToFilePos(int x, int y, ULONG *pnLineNo, ULONG *pnFileOffset, int *px);//, ULONG *pnLineLen=0);
	VOID		RepositionCaret();
	//VOID		MoveCaret(int x, int y);
	VOID		UpdateCaretXY(int x, ULONG lineno);
	VOID		UpdateCaretOffset(ULONG offset, BOOL fTrailing, int *outx=0, ULONG *outlineno=0);
	VOID		Smeg(BOOL fAdvancing);

	VOID		MoveWordPrev();
	VOID		MoveWordNext();
	VOID		MoveWordStart();
	VOID		MoveWordEnd();
	VOID		MoveCharPrev();
	VOID		MoveCharNext();
	VOID		MoveLineUp(int numLines);
	VOID		MoveLineDown(int numLines);
	VOID		MovePageUp();
	VOID		MovePageDown();
	VOID		MoveLineStart(ULONG lineNo);
	VOID		MoveLineEnd(ULONG lineNo);
	VOID		MoveFileStart();
	VOID		MoveFileEnd();

	//
	//	Editing
	//	
	BOOL		Undo();
	BOOL		Redo();
	BOOL		CanUndo();
	BOOL		CanRedo();
	BOOL		ForwardDelete();
	BOOL		BackDelete();
	ULONG		EnterText(TCHAR *szText, ULONG nLength);

	//
	//	Scrolling
	//
	HRGN		ScrollRgn(int dx, int dy, bool fReturnUpdateRgn);
	void		Scroll(int dx, int dy);
	void		ScrollToCaret();
	void		ScrollToPosition(int xpos, ULONG lineno);
	VOID		SetupScrollbars();
	VOID		UpdateMetrics();
	VOID		RecalcLineHeight();
	bool		PinToBottomCorner();

	//
	//	TextView configuration
	//
	ULONG		SetStyle(ULONG uMask, ULONG uStyles);
	ULONG		SetVar(ULONG nVar, ULONG nValue);
	ULONG		GetVar(ULONG nVar);
	ULONG		GetStyleMask(ULONG uMask);
	bool		CheckStyle(ULONG uMask);

	COLORREF	SetColour(UINT idx, COLORREF rgbColour);
	COLORREF	GetColour(UINT idx);
	COLORREF	LineColour(ULONG nLineNo);
	COLORREF	LongColour(ULONG nLineNo);

	//
	//	Miscallaneous
	//
	HMENU		CreateContextMenu();
	ULONG		NotifyParent(UINT nNotifyCode, NMHDR *optional = 0);



	//
	// ------ Internal TextView State ------
	//

	HWND		m_hWnd;
	HTHEME		m_hTheme;
	ULONG		m_uStyleFlags;

	// File-related data
	ULONG		m_nLineCount;

	// Font-related data	
	USPFONT		m_uspFontList[MAX_FONTS];
	int			m_nNumFonts;
	int			m_nFontWidth;
	int			m_nMaxAscent;
	int			m_nLineHeight;
	int			m_nHeightAbove;
	int			m_nHeightBelow;

	// Scrollbar-related data
	ULONG		m_nVScrollPos;
	ULONG		m_nVScrollMax;
	int			m_nHScrollPos;
	int			m_nHScrollMax;

	int			m_nLongestLine;
	int			m_nWindowLines;
	int			m_nWindowColumns;

	// Cursor/Caret position 
	ULONG		m_nCurrentLine;
	ULONG		m_nSelectionStart;
	ULONG		m_nSelectionEnd;
	ULONG		m_nCursorOffset;
	ULONG		m_nSelMarginOffset1;
	ULONG		m_nSelMarginOffset2;
	int			m_nCaretPosX;
	int			m_nAnchorPosX;
	
	SELMODE		m_nSelectionMode;
	SELMODE		m_nSelectionType;
	CURPOS		m_cpBlockStart;
	CURPOS		m_cpBlockEnd;
	UINT		m_nEditMode;

	// Display-related data
	int			m_nTabWidthChars;
	DWORD		m_nCaretWidth;
	int			m_nLongLineLimit;
	int			m_nCRLFMode;
	
	LINEINFO	m_LineInfo[MAX_LINE_INFO];
	int			m_nLineInfoCount;

	// Margin information
	int			m_nLinenoWidth;
	HCURSOR		m_hMarginCursor;
	//RECT		m_rcBorder;

	COLORREF	m_rgbColourList[TXC_MAX_COLOURS];

	// Runtime data
	UINT		m_nScrollTimer;
	int			m_nScrollCounter;
	bool		m_fHideCaret;
	//bool		m_fTransparent;
	HIMAGELIST	m_hImageList;
	HMENU		m_hUserMenu;

	// Cache for USPDATA objects
	USPCACHE    *m_uspCache;
	USPDATA		*GetUspData(HDC hdc, ULONG nLineNo, ULONG *nOffset=0);
	USPCACHE    *GetUspCache(HDC hdc, ULONG nLineNo, ULONG *nOffset=0);
	bool		 GetLogAttr(ULONG nLineNo, USPCACHE **puspCache, CSCRIPT_LOGATTR **plogAttr=0, ULONG *pnOffset=0);

	TextDocument *m_pTextDoc;
};

#endif