1 #include <u.h>
2 #include <libc.h>
3 #include <ctype.h>
4 #include <draw.h>
5 #include <thread.h>
6 #include <mouse.h>
7 #include <cursor.h>
8 #include <keyboard.h>
9 #include <frame.h>
10 #include <plumb.h>
11 #include <termios.h>
12 
13 #define fatal	sysfatal
14 
15 typedef struct Text	Text;
16 typedef struct Readbuf	Readbuf;
17 
18 enum
19 {
20 	/* these are chosen to use malloc()'s properties well */
21 	HiWater	= 640000,	/* max size of history */
22 	LoWater	= 330000,	/* min size of history after max'ed */
23 };
24 
25 /* various geometric paramters */
26 enum
27 {
28 	Scrollwid 	= 12,		/* width of scroll bar */
29 	Scrollgap 	= 4,		/* gap right of scroll bar */
30 	Maxtab		= 4,
31 };
32 
33 enum
34 {
35 	Cut,
36 	Paste,
37 	Snarf,
38 	Send,
39 	Scroll,
40 	Plumb,
41 };
42 
43 
44 #define	SCROLLKEY	Kdown
45 #define	ESC		0x1B
46 #define CUT		0x18	/* ctrl-x */		
47 #define COPY		0x03	/* crtl-c */
48 #define PASTE		0x16	/* crtl-v */
49 #define BACKSCROLLKEY	Kup
50 
51 #define	READBUFSIZE 8192
52 
53 struct Text
54 {
55 	Frame		*f;		/* frame ofr terminal */
56 	Mouse		m;
57 	uint		nr;		/* num of runes in term */
58 	Rune		*r;		/* runes for term */
59 	uint		nraw;		/* num of runes in raw buffer */
60 	Rune		*raw;		/* raw buffer */
61 	uint		org;		/* first rune on the screen */
62 	uint		q0;		/* start of selection region */
63 	uint		q1;		/* end of selection region */
64 	uint		qh;		/* unix point */
65 	int		npart;		/* partial runes read from console */
66 	char		part[UTFmax];	
67 	int		nsnarf;		/* snarf buffer */
68 	Rune		*snarf;
69 };
70 
71 struct Readbuf
72 {
73 	short	n;				/* # bytes in buf */
74 	uchar	data[READBUFSIZE];		/* data bytes */
75 };
76 
77 void	mouse(void);
78 void	domenu2(int);
79 void	loop(void);
80 void	geom(void);
81 void	fill(void);
82 void	tcheck(void);
83 void	updatesel(void);
84 void	doreshape(void);
85 void	rcstart(int fd[2], int, char**);
86 void	runewrite(Rune*, int);
87 void	consread(void);
88 void	conswrite(char*, int);
89 int	bswidth(Rune c);
90 void	cut(void);
91 void	paste(Rune*, int, int);
92 void	snarfupdate(void);
93 void	snarf(void);
94 void	show(uint);
95 void	key(Rune);
96 void	setorigin(uint org, int exact);
97 uint	line2q(uint);
98 uint	backnl(uint, uint);
99 int	cansee(uint);
100 uint	backnl(uint, uint);
101 void	addraw(Rune*, int);
102 void	mselect(void);
103 void	doubleclick(uint *q0, uint *q1);
104 int	clickmatch(int cl, int cr, int dir, uint *q);
105 Rune	*strrune(Rune *s, Rune c);
106 int	consready(void);
107 Rectangle scrpos(Rectangle r, ulong p0, ulong p1, ulong tot);
108 void	scrdraw(void);
109 void	scroll(int);
110 void	hostproc(void *arg);
111 void	hoststart(void);
112 int	getchildwd(int, char*, int);
113 void	plumbstart(void);
114 void	plumb(uint, uint);
115 void	plumbclick(uint*, uint*);
116 int	getpts(int fd[], char *slave);
117 
118 #define	runemalloc(n)		malloc((n)*sizeof(Rune))
119 #define	runerealloc(a, n)	realloc(a, (n)*sizeof(Rune))
120 #define	runemove(a, b, n)	memmove(a, b, (n)*sizeof(Rune))