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	frame.h - sam - An updated version of the sam text editor.
	git clone git://vernunftzentrum.de/sam.git
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	frame.h (2791B)
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	1 /* Copyright (c) 1998 Lucent Technologies - All rights reserved. */
	2
	3 typedef struct Frbox Frbox;
	4 typedef struct Frame Frame;
	5
	6 struct Frbox
	7 {
	8 int64_t wid; /* in pixels */
	9 int64_t nrune; /* <0 ==> negate and treat as break char …
	10 union{
	11 uint8_t *ptr;
	12 struct{
	13 int16_t bc; /* break char */
	14 int16_t minwid;
	15 } b;
	16 } a;
	17 };
	18
	19 /* note that we track background color, but not foreground
	20 * this is because the foreground color is the same for all frames
	21 */
	22 struct Frame
	23 {
	24 uint64_t bg; /* background color */
	25 XftFont font; / of chars in the frame */
	26 Bitmap b; / on which frame appears */
	27 Rectangle r; /* in which text appears */
	28 Rectangle entire; /* of full frame */
	29 Frbox *box;
	30 uint64_t p0, p1; /* selection */
	31 int16_t left; /* left edge of text */
	32 uint16_t nbox, nalloc;
	33 uint16_t maxtab; /* max size of tab, in pixels */
	34 uint16_t fheight; /* font height, in pixels */
	35 uint16_t nchars; /* # runes in frame */
	36 uint16_t nlines; /* # lines with text */
	37 uint16_t maxlines; /* total # lines in frame */
	38 bool lastlinefull; /* last line fills frame */
	39 bool modified; /* changed since frselect() */
	40 };
	41
	42 uint64_t frcharofpt(Frame*, Point);
	43 Point frptofchar(Frame*, uint64_t);
	44 int frdelete(Frame*, uint64_t, uint64_t);
	45 void frinsert(Frame, wchar_t, wchar_t*, uint64_t);
	46 void frselect(Frame, Mouse);
	47 void frselectp(Frame*, Fcode);
	48 void frselectf(Frame*, Point, Point, Fcode);
	49 void frinit(Frame, Rectangle, XftFont, Bitmap*, uint64_t);
	50 void frsetrects(Frame, Rectangle, Bitmap);
	51 void frclear(Frame*);
	52 void frgetmouse(void);
	53
	54 uint8_t *_frallocstr(unsigned);
	55 void _frinsure(Frame*, int, unsigned);
	56 Point _frdraw(Frame*, Point);
	57 void _frgrowbox(Frame*, int);
	58 void _frfreebox(Frame*, int, int);
	59 void _frmergebox(Frame*, int);
	60 void _frdelbox(Frame*, int, int);
	61 void _frsplitbox(Frame*, int, int);
	62 int _frfindbox(Frame*, int, uint64_t, uint64_t);
	63 void _frclosebox(Frame*, int, int);
	64 int _frcanfit(Frame, Point, Frbox);
	65 void _frcklinewrap(Frame, Point, Frbox*);
	66 void _frcklinewrap0(Frame, Point, Frbox*);
	67 void _fradvance(Frame, Point, Frbox*);
	68 int _frnewwid(Frame, Point, Frbox);
	69 void _frclean(Frame*, Point, int, int);
	70 void _frredraw(Frame*, Point);
	71 void _fraddbox(Frame*, int, int);
	72 Point _frptofcharptb(Frame*, uint64_t, Point, int);
	73 Point _frptofcharnb(Frame*, uint64_t, int);
	74 int _frstrlen(Frame*, int);
	75
	76 extern int tabwidth;
	77
	78 #define NRUNE(b) ((b)->nrune<0? 1 : (b)->nrune)
	79 #define NBYTE(b) strlen((char*)(b)->a.ptr)