#ifndef TextLinePainter_First
#define TextLinePainter_First
#ifdef __GNUG__
#pragma interface
#endif

#include "Object.h"
#include "TextStyles.h"
#include "Text.h"

class VisualMark;

//---- TextPainter -------------------------------------------------------------
//     paint text lines

class TextPainter: public Object {
public:
	MetaDef(TextPainter);
	TextPainter();
	~TextPainter();

	int LineWidth(Text *t, int from, int to);
	void LineHeight(Text *t, LineDesc &ld, int start, int end);

	virtual void Draw(Text *t, const Point &p, int from, int to,
			const Rectangle &lr, const Rectangle &clip, bool invis= TRUE);
	virtual int Map(Text *t, int from, int to, int stop, int x,
			int width, int *posX);
	int GetFormatWidth(Text *t, int at, int width);
	int Tabulate(Text *t, int x, int at, int linestart);

private:
	byte *linebuf;
	byte *line;
	ParaStyle *ps;          // current paragraph style on a line
	CharStyle *sp;          // current character style on a line
	int graphicChar;        // graphic escape character
	int nextFontChange;     // position of next font change on line

	bool TestFontChange(Text *t, int at, CharStyle *&sp);
	bool TestVisualMark(Text *t, int at, int ch);

	void Init(Text *t, int from, int to);
	int Strip(Text *t, int from, int to);
	int CalcSpace(Text *t, int w, int from, int to, int &space, int &blanks, int &ntab);
	int CalcIndent(Text *t, ParaStyle *p, int at, int &width);
	int CalcWidth(Text *t, int from, int to);
	int CalcTabWidth(Text *t, ParaStyle *p, int x, int at);
	int TabColWidth(Text *t, int start, char *stops);
	void SetCharStyle(CharStyle *cs);
	bool IsJustified(Text *t, int at);
	int FirstCharPos(Text *t, int width, int start, int end);

	void ShowInvisible(byte ch);
	void ShowNoBreak(const Point &p, const Rectangle &clip, Text *t,
														int start, int end);
	void ShowKeepNext(const Point &p, const Rectangle &clip, Text *t,
														int start, int end);
	void DrawVisualMark(const Point &p, VisualMark *vmp, const Rectangle &clip,
										const Rectangle &line, bool border);
};

//---- inlines -----------------------------------------------------------------

inline bool TextPainter::TestFontChange(Text *t, int at, CharStyle *&s)
{
	if (at == nextFontChange) {
		nextFontChange= t->GetNextFontChange(at, s);
		return TRUE;
	} else
		return FALSE;
}

inline bool TextPainter::TestVisualMark(Text *t, int at, int ch)
	{ return (graphicChar && ch == graphicChar && t->IsVisualMark(at)); }

#endif