typedef enum Vis{	None=0,	Some,	All,}Vis; enum{	Clicktime=1000,		/* one second */}; typedef struct Flayer Flayer; struct Flayer{	Frame		f;	long		origin;	/* offset of first char in flayer */	long		p0, p1;	long		click;	/* time at which selection click occurred, in HZ */	Rune		*(*textfn)(Flayer*, long, ulong*);	int		user0;	void		*user1;	Rectangle	entire;	Rectangle	scroll;	Rectangle	lastsr;	/* geometry of scrollbar when last drawn */	Vis		visible;}; void	flborder(Flayer*, int);void	flclose(Flayer*);void	fldelete(Flayer*, long, long);void	flfp0p1(Flayer*, ulong*, ulong*);void	flinit(Flayer*, Rectangle, Font*, Image**);void	flinsert(Flayer*, Rune*, Rune*, long);void	flnew(Flayer*, Rune *(*fn)(Flayer*, long, ulong*), int, void*);int	flprepare(Flayer*);Rectangle flrect(Flayer*, Rectangle);void	flrefresh(Flayer*, Rectangle, int);void	flresize(Rectangle);int	flselect(Flayer*);void	flsetselect(Flayer*, long, long);void	flstart(Rectangle);void	flupfront(Flayer*);Flayer	*flwhich(Point); #define	FLMARGIN	4#define	FLSCROLLWID	12#define	FLGAP		4 extern	Image	*maincols[NCOL];extern	Image	*cmdcols[NCOL];