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89fbee91960f028b1c08be431f99dc2872da1947
[st.git] / st.c
1 /* See LICENSE for licence details. */
2 #define _XOPEN_SOURCE 600
3 #include <ctype.h>
4 #include <errno.h>
5 #include <fcntl.h>
6 #include <limits.h>
7 #include <locale.h>
8 #include <stdarg.h>
9 #include <stdio.h>
10 #include <stdlib.h>
11 #include <string.h>
12 #include <signal.h>
13 #include <sys/ioctl.h>
14 #include <sys/select.h>
15 #include <sys/stat.h>
16 #include <sys/types.h>
17 #include <sys/wait.h>
18 #include <unistd.h>
19 #include <X11/Xatom.h>
20 #include <X11/Xlib.h>
21 #include <X11/Xutil.h>
22 #include <X11/cursorfont.h>
23 #include <X11/keysym.h>
24
25 #include <sys/time.h>
26 #include <time.h>
27
28 #if defined(__linux)
29 #include <pty.h>
30 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
31 #include <util.h>
32 #elif defined(__FreeBSD__) || defined(__DragonFly__)
33 #include <libutil.h>
34 #endif
35
36 #define USAGE \
37 "st-" VERSION ", (c) 2010-2011 st engineers\n" \
38 "usage: st [-t title] [-c class] [-w windowid] [-v] [-e command...]\n"
39
40 /* XEMBED messages */
41 #define XEMBED_FOCUS_IN 4
42 #define XEMBED_FOCUS_OUT 5
43
44 /* Arbitrary sizes */
45 #define ESC_TITLE_SIZ 256
46 #define ESC_BUF_SIZ 256
47 #define ESC_ARG_SIZ 16
48 #define DRAW_BUF_SIZ 1024
49 #define UTF_SIZ 4
50 #define XK_NO_MOD UINT_MAX
51 #define XK_ANY_MOD 0
52
53 #define SERRNO strerror(errno)
54 #define MIN(a, b) ((a) < (b) ? (a) : (b))
55 #define MAX(a, b) ((a) < (b) ? (b) : (a))
56 #define LEN(a) (sizeof(a) / sizeof(a[0]))
57 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
58 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
59 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
60 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
61 #define IS_SET(flag) (term.mode & (flag))
62 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_usec-t2.tv_usec)/1000)
63 #define X2COL(x) (((x) - BORDER)/xw.cw)
64 #define Y2ROW(y) (((y) - BORDER)/xw.ch)
65
66 /* Attribute, Cursor, Character state, Terminal mode, Screen draw mode */
67 enum { ATTR_NULL=0 , ATTR_REVERSE=1 , ATTR_UNDERLINE=2, ATTR_BOLD=4, ATTR_GFX=8 };
68 enum { CURSOR_UP, CURSOR_DOWN, CURSOR_LEFT, CURSOR_RIGHT,
69 CURSOR_SAVE, CURSOR_LOAD };
70 enum { CURSOR_DEFAULT = 0, CURSOR_HIDE = 1, CURSOR_WRAPNEXT = 2 };
71 enum { GLYPH_SET=1, GLYPH_DIRTY=2 };
72 enum { MODE_WRAP=1, MODE_INSERT=2, MODE_APPKEYPAD=4, MODE_ALTSCREEN=8,
73 MODE_CRLF=16, MODE_MOUSEBTN=32, MODE_MOUSEMOTION=64, MODE_MOUSE=32|64, MODE_REVERSE=128 };
74 enum { ESC_START=1, ESC_CSI=2, ESC_OSC=4, ESC_TITLE=8, ESC_ALTCHARSET=16 };
75 enum { WIN_VISIBLE=1, WIN_REDRAW=2, WIN_FOCUSED=4 };
76
77 #undef B0
78 enum { B0=1, B1=2, B2=4, B3=8, B4=16, B5=32, B6=64, B7=128 };
79
80 typedef struct {
81 char c[UTF_SIZ]; /* character code */
82 char mode; /* attribute flags */
83 int fg; /* foreground */
84 int bg; /* background */
85 char state; /* state flags */
86 } Glyph;
87
88 typedef Glyph* Line;
89
90 typedef struct {
91 Glyph attr; /* current char attributes */
92 int x;
93 int y;
94 char state;
95 } TCursor;
96
97 /* CSI Escape sequence structs */
98 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
99 typedef struct {
100 char buf[ESC_BUF_SIZ]; /* raw string */
101 int len; /* raw string length */
102 char priv;
103 int arg[ESC_ARG_SIZ];
104 int narg; /* nb of args */
105 char mode;
106 } CSIEscape;
107
108 /* Internal representation of the screen */
109 typedef struct {
110 int row; /* nb row */
111 int col; /* nb col */
112 Line* line; /* screen */
113 Line* alt; /* alternate screen */
114 TCursor c; /* cursor */
115 int top; /* top scroll limit */
116 int bot; /* bottom scroll limit */
117 int mode; /* terminal mode flags */
118 int esc; /* escape state flags */
119 char title[ESC_TITLE_SIZ];
120 int titlelen;
121 } Term;
122
123 /* Purely graphic info */
124 typedef struct {
125 Display* dpy;
126 Colormap cmap;
127 Window win;
128 Pixmap buf;
129 Atom xembed;
130 XIM xim;
131 XIC xic;
132 int scr;
133 int w; /* window width */
134 int h; /* window height */
135 int bufw; /* pixmap width */
136 int bufh; /* pixmap height */
137 int ch; /* char height */
138 int cw; /* char width */
139 char state; /* focus, redraw, visible */
140 } XWindow;
141
142 typedef struct {
143 KeySym k;
144 unsigned int mask;
145 char s[ESC_BUF_SIZ];
146 } Key;
147
148 /* Drawing Context */
149 typedef struct {
150 unsigned long col[256];
151 GC gc;
152 struct {
153 int ascent;
154 int descent;
155 short lbearing;
156 short rbearing;
157 XFontSet set;
158 } font, bfont;
159 } DC;
160
161 /* TODO: use better name for vars... */
162 typedef struct {
163 int mode;
164 int bx, by;
165 int ex, ey;
166 struct {int x, y;} b, e;
167 char *clip;
168 Atom xtarget;
169 struct timeval tclick1;
170 struct timeval tclick2;
171 } Selection;
172
173 #include "config.h"
174
175 static void die(const char*, ...);
176 static void draw(void);
177 static void drawregion(int, int, int, int);
178 static void execsh(void);
179 static void sigchld(int);
180 static void run(void);
181
182 static void csidump(void);
183 static void csihandle(void);
184 static void csiparse(void);
185 static void csireset(void);
186
187 static void tclearregion(int, int, int, int);
188 static void tcursor(int);
189 static void tdeletechar(int);
190 static void tdeleteline(int);
191 static void tinsertblank(int);
192 static void tinsertblankline(int);
193 static void tmoveto(int, int);
194 static void tnew(int, int);
195 static void tnewline(int);
196 static void tputtab(void);
197 static void tputc(char*);
198 static void treset(void);
199 static int tresize(int, int);
200 static void tscrollup(int, int);
201 static void tscrolldown(int, int);
202 static void tsetattr(int*, int);
203 static void tsetchar(char*);
204 static void tsetscroll(int, int);
205 static void tswapscreen(void);
206
207 static void ttynew(void);
208 static void ttyread(void);
209 static void ttyresize(int, int);
210 static void ttywrite(const char *, size_t);
211
212 static void xdraws(char *, Glyph, int, int, int, int);
213 static void xhints(void);
214 static void xclear(int, int, int, int);
215 static void xdrawcursor(void);
216 static void xinit(void);
217 static void xloadcols(void);
218 static void xseturgency(int);
219 static void xsetsel(char*);
220 static void xresize(int, int);
221
222 static void expose(XEvent *);
223 static void visibility(XEvent *);
224 static void unmap(XEvent *);
225 static char* kmap(KeySym, unsigned int state);
226 static void kpress(XEvent *);
227 static void cmessage(XEvent *);
228 static void resize(XEvent *);
229 static void focus(XEvent *);
230 static void brelease(XEvent *);
231 static void bpress(XEvent *);
232 static void bmotion(XEvent *);
233 static void selnotify(XEvent *);
234 static void selrequest(XEvent *);
235
236 static void selinit(void);
237 static inline int selected(int, int);
238 static void selcopy(void);
239 static void selpaste();
240 static void selscroll(int, int);
241
242 static int utf8decode(char *, long *);
243 static int utf8encode(long *, char *);
244 static int utf8size(char *);
245 static int isfullutf8(char *, int);
246
247 static void (*handler[LASTEvent])(XEvent *) = {
248 [KeyPress] = kpress,
249 [ClientMessage] = cmessage,
250 [ConfigureNotify] = resize,
251 [VisibilityNotify] = visibility,
252 [UnmapNotify] = unmap,
253 [Expose] = expose,
254 [FocusIn] = focus,
255 [FocusOut] = focus,
256 [MotionNotify] = bmotion,
257 [ButtonPress] = bpress,
258 [ButtonRelease] = brelease,
259 [SelectionNotify] = selnotify,
260 [SelectionRequest] = selrequest,
261 };
262
263 /* Globals */
264 static DC dc;
265 static XWindow xw;
266 static Term term;
267 static CSIEscape escseq;
268 static int cmdfd;
269 static pid_t pid;
270 static Selection sel;
271 static char **opt_cmd = NULL;
272 static char *opt_title = NULL;
273 static char *opt_embed = NULL;
274 static char *opt_class = NULL;
275
276 int
277 utf8decode(char *s, long *u) {
278 unsigned char c;
279 int i, n, rtn;
280
281 rtn = 1;
282 c = *s;
283 if(~c&B7) { /* 0xxxxxxx */
284 *u = c;
285 return rtn;
286 } else if((c&(B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */
287 *u = c&(B4|B3|B2|B1|B0);
288 n = 1;
289 } else if((c&(B7|B6|B5|B4)) == (B7|B6|B5)) { /* 1110xxxx */
290 *u = c&(B3|B2|B1|B0);
291 n = 2;
292 } else if((c&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) { /* 11110xxx */
293 *u = c&(B2|B1|B0);
294 n = 3;
295 } else
296 goto invalid;
297 for(i=n,++s; i>0; --i,++rtn,++s) {
298 c = *s;
299 if((c&(B7|B6)) != B7) /* 10xxxxxx */
300 goto invalid;
301 *u <<= 6;
302 *u |= c&(B5|B4|B3|B2|B1|B0);
303 }
304 if((n == 1 && *u < 0x80) ||
305 (n == 2 && *u < 0x800) ||
306 (n == 3 && *u < 0x10000) ||
307 (*u >= 0xD800 && *u <= 0xDFFF))
308 goto invalid;
309 return rtn;
310 invalid:
311 *u = 0xFFFD;
312 return rtn;
313 }
314
315 int
316 utf8encode(long *u, char *s) {
317 unsigned char *sp;
318 unsigned long uc;
319 int i, n;
320
321 sp = (unsigned char*) s;
322 uc = *u;
323 if(uc < 0x80) {
324 *sp = uc; /* 0xxxxxxx */
325 return 1;
326 } else if(*u < 0x800) {
327 *sp = (uc >> 6) | (B7|B6); /* 110xxxxx */
328 n = 1;
329 } else if(uc < 0x10000) {
330 *sp = (uc >> 12) | (B7|B6|B5); /* 1110xxxx */
331 n = 2;
332 } else if(uc <= 0x10FFFF) {
333 *sp = (uc >> 18) | (B7|B6|B5|B4); /* 11110xxx */
334 n = 3;
335 } else {
336 goto invalid;
337 }
338 for(i=n,++sp; i>0; --i,++sp)
339 *sp = ((uc >> 6*(i-1)) & (B5|B4|B3|B2|B1|B0)) | B7; /* 10xxxxxx */
340 return n+1;
341 invalid:
342 /* U+FFFD */
343 *s++ = '\xEF';
344 *s++ = '\xBF';
345 *s = '\xBD';
346 return 3;
347 }
348
349 /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
350 UTF-8 otherwise return 0 */
351 int
352 isfullutf8(char *s, int b) {
353 unsigned char *c1, *c2, *c3;
354
355 c1 = (unsigned char *) s;
356 c2 = (unsigned char *) ++s;
357 c3 = (unsigned char *) ++s;
358 if(b < 1)
359 return 0;
360 else if((*c1&(B7|B6|B5)) == (B7|B6) && b == 1)
361 return 0;
362 else if((*c1&(B7|B6|B5|B4)) == (B7|B6|B5) &&
363 ((b == 1) ||
364 ((b == 2) && (*c2&(B7|B6)) == B7)))
365 return 0;
366 else if((*c1&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4) &&
367 ((b == 1) ||
368 ((b == 2) && (*c2&(B7|B6)) == B7) ||
369 ((b == 3) && (*c2&(B7|B6)) == B7 && (*c3&(B7|B6)) == B7)))
370 return 0;
371 else
372 return 1;
373 }
374
375 int
376 utf8size(char *s) {
377 unsigned char c = *s;
378
379 if(~c&B7)
380 return 1;
381 else if((c&(B7|B6|B5)) == (B7|B6))
382 return 2;
383 else if((c&(B7|B6|B5|B4)) == (B7|B6|B5))
384 return 3;
385 else
386 return 4;
387 }
388
389 void
390 selinit(void) {
391 sel.tclick1.tv_sec = 0;
392 sel.tclick1.tv_usec = 0;
393 sel.mode = 0;
394 sel.bx = -1;
395 sel.clip = NULL;
396 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
397 if(sel.xtarget == None)
398 sel.xtarget = XA_STRING;
399 }
400
401 static inline int
402 selected(int x, int y) {
403 if(sel.ey == y && sel.by == y) {
404 int bx = MIN(sel.bx, sel.ex);
405 int ex = MAX(sel.bx, sel.ex);
406 return BETWEEN(x, bx, ex);
407 }
408 return ((sel.b.y < y&&y < sel.e.y) || (y==sel.e.y && x<=sel.e.x))
409 || (y==sel.b.y && x>=sel.b.x && (x<=sel.e.x || sel.b.y!=sel.e.y));
410 }
411
412 void
413 getbuttoninfo(XEvent *e, int *b, int *x, int *y) {
414 if(b)
415 *b = e->xbutton.button;
416
417 *x = X2COL(e->xbutton.x);
418 *y = Y2ROW(e->xbutton.y);
419 sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
420 sel.b.y = MIN(sel.by, sel.ey);
421 sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
422 sel.e.y = MAX(sel.by, sel.ey);
423 }
424
425 void
426 mousereport(XEvent *e) {
427 int x = X2COL(e->xbutton.x);
428 int y = Y2ROW(e->xbutton.y);
429 int button = e->xbutton.button;
430 int state = e->xbutton.state;
431 char buf[] = { '\033', '[', 'M', 0, 32+x+1, 32+y+1 };
432 static int ob, ox, oy;
433
434 /* from urxvt */
435 if(e->xbutton.type == MotionNotify) {
436 if(!IS_SET(MODE_MOUSEMOTION) || (x == ox && y == oy))
437 return;
438 button = ob + 32;
439 ox = x, oy = y;
440 } else if(e->xbutton.type == ButtonRelease || button == AnyButton) {
441 button = 3;
442 } else {
443 button -= Button1;
444 if(button >= 3)
445 button += 64 - 3;
446 if(e->xbutton.type == ButtonPress) {
447 ob = button;
448 ox = x, oy = y;
449 }
450 }
451
452 buf[3] = 32 + button + (state & ShiftMask ? 4 : 0)
453 + (state & Mod4Mask ? 8 : 0)
454 + (state & ControlMask ? 16 : 0);
455
456 ttywrite(buf, sizeof(buf));
457 }
458
459 void
460 bpress(XEvent *e) {
461 if(IS_SET(MODE_MOUSE))
462 mousereport(e);
463 else if(e->xbutton.button == Button1) {
464 sel.mode = 1;
465 sel.ex = sel.bx = X2COL(e->xbutton.x);
466 sel.ey = sel.by = Y2ROW(e->xbutton.y);
467 }
468 }
469
470 void
471 selcopy(void) {
472 char *str, *ptr;
473 int x, y, sz, sl, ls = 0;
474
475 if(sel.bx == -1)
476 str = NULL;
477 else {
478 sz = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
479 ptr = str = malloc(sz);
480 for(y = 0; y < term.row; y++) {
481 for(x = 0; x < term.col; x++)
482 if(term.line[y][x].state & GLYPH_SET && (ls = selected(x, y))) {
483 sl = utf8size(term.line[y][x].c);
484 memcpy(ptr, term.line[y][x].c, sl);
485 ptr += sl;
486 }
487 if(ls && y < sel.e.y)
488 *ptr++ = '\n';
489 }
490 *ptr = 0;
491 }
492 xsetsel(str);
493 }
494
495 void
496 selnotify(XEvent *e) {
497 unsigned long nitems, ofs, rem;
498 int format;
499 unsigned char *data;
500 Atom type;
501
502 ofs = 0;
503 do {
504 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
505 False, AnyPropertyType, &type, &format,
506 &nitems, &rem, &data)) {
507 fprintf(stderr, "Clipboard allocation failed\n");
508 return;
509 }
510 ttywrite((const char *) data, nitems * format / 8);
511 XFree(data);
512 /* number of 32-bit chunks returned */
513 ofs += nitems * format / 32;
514 } while(rem > 0);
515 }
516
517 void
518 selpaste() {
519 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY, xw.win, CurrentTime);
520 }
521
522 void
523 selrequest(XEvent *e) {
524 XSelectionRequestEvent *xsre;
525 XSelectionEvent xev;
526 Atom xa_targets;
527
528 xsre = (XSelectionRequestEvent *) e;
529 xev.type = SelectionNotify;
530 xev.requestor = xsre->requestor;
531 xev.selection = xsre->selection;
532 xev.target = xsre->target;
533 xev.time = xsre->time;
534 /* reject */
535 xev.property = None;
536
537 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
538 if(xsre->target == xa_targets) {
539 /* respond with the supported type */
540 Atom string = sel.xtarget;
541 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
542 XA_ATOM, 32, PropModeReplace,
543 (unsigned char *) &string, 1);
544 xev.property = xsre->property;
545 } else if(xsre->target == sel.xtarget) {
546 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
547 xsre->target, 8, PropModeReplace,
548 (unsigned char *) sel.clip, strlen(sel.clip));
549 xev.property = xsre->property;
550 }
551
552 /* all done, send a notification to the listener */
553 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
554 fprintf(stderr, "Error sending SelectionNotify event\n");
555 }
556
557 void
558 xsetsel(char *str) {
559 /* register the selection for both the clipboard and the primary */
560 Atom clipboard;
561
562 free(sel.clip);
563 sel.clip = str;
564
565 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
566
567 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
568 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
569
570 XFlush(xw.dpy);
571 }
572
573 void
574 brelease(XEvent *e) {
575 if(IS_SET(MODE_MOUSE)) {
576 mousereport(e);
577 return;
578 }
579 if(e->xbutton.button == Button2)
580 selpaste();
581 else if(e->xbutton.button == Button1) {
582 sel.mode = 0;
583 getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
584 if(sel.bx == sel.ex && sel.by == sel.ey) {
585 struct timeval now;
586 sel.bx = -1;
587 gettimeofday(&now, NULL);
588
589 if(TIMEDIFF(now, sel.tclick2) <= TRIPLECLICK_TIMEOUT) {
590 /* triple click on the line */
591 sel.b.x = sel.bx = 0;
592 sel.e.x = sel.ex = term.col;
593 sel.b.y = sel.e.y = sel.ey;
594 selcopy();
595 } else if(TIMEDIFF(now, sel.tclick1) <= DOUBLECLICK_TIMEOUT) {
596 /* double click to select word */
597 sel.bx = sel.ex;
598 while(sel.bx > 0 && term.line[sel.ey][sel.bx-1].state & GLYPH_SET &&
599 term.line[sel.ey][sel.bx-1].c[0] != ' ') sel.bx--;
600 sel.b.x = sel.bx;
601 while(sel.ex < term.col-1 && term.line[sel.ey][sel.ex+1].state & GLYPH_SET &&
602 term.line[sel.ey][sel.ex+1].c[0] != ' ') sel.ex++;
603 sel.e.x = sel.ex;
604 sel.b.y = sel.e.y = sel.ey;
605 selcopy();
606 }
607 } else
608 selcopy();
609 }
610 memcpy(&sel.tclick2, &sel.tclick1, sizeof(struct timeval));
611 gettimeofday(&sel.tclick1, NULL);
612 draw();
613 }
614
615 void
616 bmotion(XEvent *e) {
617 if(IS_SET(MODE_MOUSE)) {
618 mousereport(e);
619 return;
620 }
621 if(sel.mode) {
622 int oldey = sel.ey, oldex = sel.ex;
623 getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
624
625 if(oldey != sel.ey || oldex != sel.ex) {
626 int starty = MIN(oldey, sel.ey);
627 int endy = MAX(oldey, sel.ey);
628 drawregion(0, (starty > 0 ? starty : 0), term.col, (endy < term.row ? endy+1 : term.row));
629 }
630 }
631 }
632
633 void
634 die(const char *errstr, ...) {
635 va_list ap;
636
637 va_start(ap, errstr);
638 vfprintf(stderr, errstr, ap);
639 va_end(ap);
640 exit(EXIT_FAILURE);
641 }
642
643 void
644 execsh(void) {
645 char **args;
646 char *envshell = getenv("SHELL");
647
648 DEFAULT(envshell, "sh");
649 putenv("TERM="TNAME);
650 args = opt_cmd ? opt_cmd : (char*[]){envshell, "-i", NULL};
651 execvp(args[0], args);
652 exit(EXIT_FAILURE);
653 }
654
655 void
656 sigchld(int a) {
657 int stat = 0;
658 if(waitpid(pid, &stat, 0) < 0)
659 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
660 if(WIFEXITED(stat))
661 exit(WEXITSTATUS(stat));
662 else
663 exit(EXIT_FAILURE);
664 }
665
666 void
667 ttynew(void) {
668 int m, s;
669
670 /* seems to work fine on linux, openbsd and freebsd */
671 struct winsize w = {term.row, term.col, 0, 0};
672 if(openpty(&m, &s, NULL, NULL, &w) < 0)
673 die("openpty failed: %s\n", SERRNO);
674
675 switch(pid = fork()) {
676 case -1:
677 die("fork failed\n");
678 break;
679 case 0:
680 setsid(); /* create a new process group */
681 dup2(s, STDIN_FILENO);
682 dup2(s, STDOUT_FILENO);
683 dup2(s, STDERR_FILENO);
684 if(ioctl(s, TIOCSCTTY, NULL) < 0)
685 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
686 close(s);
687 close(m);
688 execsh();
689 break;
690 default:
691 close(s);
692 cmdfd = m;
693 signal(SIGCHLD, sigchld);
694 }
695 }
696
697 void
698 dump(char c) {
699 static int col;
700 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
701 if(++col % 10 == 0)
702 fprintf(stderr, "\n");
703 }
704
705 void
706 ttyread(void) {
707 static char buf[BUFSIZ];
708 static int buflen = 0;
709 char *ptr;
710 char s[UTF_SIZ];
711 int charsize; /* size of utf8 char in bytes */
712 long utf8c;
713 int ret;
714
715 /* append read bytes to unprocessed bytes */
716 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
717 die("Couldn't read from shell: %s\n", SERRNO);
718
719 /* process every complete utf8 char */
720 buflen += ret;
721 ptr = buf;
722 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
723 charsize = utf8decode(ptr, &utf8c);
724 utf8encode(&utf8c, s);
725 tputc(s);
726 ptr += charsize;
727 buflen -= charsize;
728 }
729
730 /* keep any uncomplete utf8 char for the next call */
731 memmove(buf, ptr, buflen);
732 }
733
734 void
735 ttywrite(const char *s, size_t n) {
736 if(write(cmdfd, s, n) == -1)
737 die("write error on tty: %s\n", SERRNO);
738 }
739
740 void
741 ttyresize(int x, int y) {
742 struct winsize w;
743
744 w.ws_row = term.row;
745 w.ws_col = term.col;
746 w.ws_xpixel = w.ws_ypixel = 0;
747 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
748 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
749 }
750
751 void
752 tcursor(int mode) {
753 static TCursor c;
754
755 if(mode == CURSOR_SAVE)
756 c = term.c;
757 else if(mode == CURSOR_LOAD)
758 term.c = c, tmoveto(c.x, c.y);
759 }
760
761 void
762 treset(void) {
763 term.c = (TCursor){{
764 .mode = ATTR_NULL,
765 .fg = DefaultFG,
766 .bg = DefaultBG
767 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
768
769 term.top = 0, term.bot = term.row - 1;
770 term.mode = MODE_WRAP;
771 tclearregion(0, 0, term.col-1, term.row-1);
772 }
773
774 void
775 tnew(int col, int row) {
776 /* set screen size */
777 term.row = row, term.col = col;
778 term.line = malloc(term.row * sizeof(Line));
779 term.alt = malloc(term.row * sizeof(Line));
780 for(row = 0; row < term.row; row++) {
781 term.line[row] = malloc(term.col * sizeof(Glyph));
782 term.alt [row] = malloc(term.col * sizeof(Glyph));
783 }
784 /* setup screen */
785 treset();
786 }
787
788 void
789 tswapscreen(void) {
790 Line* tmp = term.line;
791 term.line = term.alt;
792 term.alt = tmp;
793 term.mode ^= MODE_ALTSCREEN;
794 }
795
796 void
797 tscrolldown(int orig, int n) {
798 int i;
799 Line temp;
800
801 LIMIT(n, 0, term.bot-orig+1);
802
803 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
804
805 for(i = term.bot; i >= orig+n; i--) {
806 temp = term.line[i];
807 term.line[i] = term.line[i-n];
808 term.line[i-n] = temp;
809 }
810
811 selscroll(orig, n);
812 }
813
814 void
815 tscrollup(int orig, int n) {
816 int i;
817 Line temp;
818 LIMIT(n, 0, term.bot-orig+1);
819
820 tclearregion(0, orig, term.col-1, orig+n-1);
821
822 for(i = orig; i <= term.bot-n; i++) {
823 temp = term.line[i];
824 term.line[i] = term.line[i+n];
825 term.line[i+n] = temp;
826 }
827
828 selscroll(orig, -n);
829 }
830
831 void
832 selscroll(int orig, int n) {
833 if(sel.bx == -1)
834 return;
835
836 if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
837 if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
838 sel.bx = -1;
839 return;
840 }
841 if(sel.by < term.top) {
842 sel.by = term.top;
843 sel.bx = 0;
844 }
845 if(sel.ey > term.bot) {
846 sel.ey = term.bot;
847 sel.ex = term.col;
848 }
849 sel.b.y = sel.by, sel.b.x = sel.bx;
850 sel.e.y = sel.ey, sel.e.x = sel.ex;
851 }
852 }
853
854 void
855 tnewline(int first_col) {
856 int y = term.c.y;
857 if(y == term.bot)
858 tscrollup(term.top, 1);
859 else
860 y++;
861 tmoveto(first_col ? 0 : term.c.x, y);
862 }
863
864 void
865 csiparse(void) {
866 /* int noarg = 1; */
867 char *p = escseq.buf;
868
869 escseq.narg = 0;
870 if(*p == '?')
871 escseq.priv = 1, p++;
872
873 while(p < escseq.buf+escseq.len) {
874 while(isdigit(*p)) {
875 escseq.arg[escseq.narg] *= 10;
876 escseq.arg[escseq.narg] += *p++ - '0'/*, noarg = 0 */;
877 }
878 if(*p == ';' && escseq.narg+1 < ESC_ARG_SIZ)
879 escseq.narg++, p++;
880 else {
881 escseq.mode = *p;
882 escseq.narg++;
883 return;
884 }
885 }
886 }
887
888 void
889 tmoveto(int x, int y) {
890 LIMIT(x, 0, term.col-1);
891 LIMIT(y, 0, term.row-1);
892 term.c.state &= ~CURSOR_WRAPNEXT;
893 term.c.x = x;
894 term.c.y = y;
895 }
896
897 void
898 tsetchar(char *c) {
899 term.line[term.c.y][term.c.x] = term.c.attr;
900 memcpy(term.line[term.c.y][term.c.x].c, c, UTF_SIZ);
901 term.line[term.c.y][term.c.x].state |= GLYPH_SET;
902 }
903
904 void
905 tclearregion(int x1, int y1, int x2, int y2) {
906 int x, y, temp;
907
908 if(x1 > x2)
909 temp = x1, x1 = x2, x2 = temp;
910 if(y1 > y2)
911 temp = y1, y1 = y2, y2 = temp;
912
913 LIMIT(x1, 0, term.col-1);
914 LIMIT(x2, 0, term.col-1);
915 LIMIT(y1, 0, term.row-1);
916 LIMIT(y2, 0, term.row-1);
917
918 for(y = y1; y <= y2; y++)
919 for(x = x1; x <= x2; x++)
920 term.line[y][x].state = 0;
921 }
922
923 void
924 tdeletechar(int n) {
925 int src = term.c.x + n;
926 int dst = term.c.x;
927 int size = term.col - src;
928
929 if(src >= term.col) {
930 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
931 return;
932 }
933 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
934 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
935 }
936
937 void
938 tinsertblank(int n) {
939 int src = term.c.x;
940 int dst = src + n;
941 int size = term.col - dst;
942
943 if(dst >= term.col) {
944 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
945 return;
946 }
947 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
948 tclearregion(src, term.c.y, dst - 1, term.c.y);
949 }
950
951 void
952 tinsertblankline(int n) {
953 if(term.c.y < term.top || term.c.y > term.bot)
954 return;
955
956 tscrolldown(term.c.y, n);
957 }
958
959 void
960 tdeleteline(int n) {
961 if(term.c.y < term.top || term.c.y > term.bot)
962 return;
963
964 tscrollup(term.c.y, n);
965 }
966
967 void
968 tsetattr(int *attr, int l) {
969 int i;
970
971 for(i = 0; i < l; i++) {
972 switch(attr[i]) {
973 case 0:
974 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD);
975 term.c.attr.fg = DefaultFG;
976 term.c.attr.bg = DefaultBG;
977 break;
978 case 1:
979 term.c.attr.mode |= ATTR_BOLD;
980 break;
981 case 4:
982 term.c.attr.mode |= ATTR_UNDERLINE;
983 break;
984 case 7:
985 term.c.attr.mode |= ATTR_REVERSE;
986 break;
987 case 22:
988 term.c.attr.mode &= ~ATTR_BOLD;
989 break;
990 case 24:
991 term.c.attr.mode &= ~ATTR_UNDERLINE;
992 break;
993 case 27:
994 term.c.attr.mode &= ~ATTR_REVERSE;
995 break;
996 case 38:
997 if(i + 2 < l && attr[i + 1] == 5) {
998 i += 2;
999 if(BETWEEN(attr[i], 0, 255))
1000 term.c.attr.fg = attr[i];
1001 else
1002 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[i]);
1003 }
1004 else
1005 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
1006 break;
1007 case 39:
1008 term.c.attr.fg = DefaultFG;
1009 break;
1010 case 48:
1011 if(i + 2 < l && attr[i + 1] == 5) {
1012 i += 2;
1013 if(BETWEEN(attr[i], 0, 255))
1014 term.c.attr.bg = attr[i];
1015 else
1016 fprintf(stderr, "erresc: bad bgcolor %d\n", attr[i]);
1017 }
1018 else
1019 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
1020 break;
1021 case 49:
1022 term.c.attr.bg = DefaultBG;
1023 break;
1024 default:
1025 if(BETWEEN(attr[i], 30, 37))
1026 term.c.attr.fg = attr[i] - 30;
1027 else if(BETWEEN(attr[i], 40, 47))
1028 term.c.attr.bg = attr[i] - 40;
1029 else if(BETWEEN(attr[i], 90, 97))
1030 term.c.attr.fg = attr[i] - 90 + 8;
1031 else if(BETWEEN(attr[i], 100, 107))
1032 term.c.attr.fg = attr[i] - 100 + 8;
1033 else
1034 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]), csidump();
1035
1036 break;
1037 }
1038 }
1039 }
1040
1041 void
1042 tsetscroll(int t, int b) {
1043 int temp;
1044
1045 LIMIT(t, 0, term.row-1);
1046 LIMIT(b, 0, term.row-1);
1047 if(t > b) {
1048 temp = t;
1049 t = b;
1050 b = temp;
1051 }
1052 term.top = t;
1053 term.bot = b;
1054 }
1055
1056 void
1057 csihandle(void) {
1058 switch(escseq.mode) {
1059 default:
1060 unknown:
1061 fprintf(stderr, "erresc: unknown csi ");
1062 csidump();
1063 /* die(""); */
1064 break;
1065 case '@': /* ICH -- Insert <n> blank char */
1066 DEFAULT(escseq.arg[0], 1);
1067 tinsertblank(escseq.arg[0]);
1068 break;
1069 case 'A': /* CUU -- Cursor <n> Up */
1070 case 'e':
1071 DEFAULT(escseq.arg[0], 1);
1072 tmoveto(term.c.x, term.c.y-escseq.arg[0]);
1073 break;
1074 case 'B': /* CUD -- Cursor <n> Down */
1075 DEFAULT(escseq.arg[0], 1);
1076 tmoveto(term.c.x, term.c.y+escseq.arg[0]);
1077 break;
1078 case 'C': /* CUF -- Cursor <n> Forward */
1079 case 'a':
1080 DEFAULT(escseq.arg[0], 1);
1081 tmoveto(term.c.x+escseq.arg[0], term.c.y);
1082 break;
1083 case 'D': /* CUB -- Cursor <n> Backward */
1084 DEFAULT(escseq.arg[0], 1);
1085 tmoveto(term.c.x-escseq.arg[0], term.c.y);
1086 break;
1087 case 'E': /* CNL -- Cursor <n> Down and first col */
1088 DEFAULT(escseq.arg[0], 1);
1089 tmoveto(0, term.c.y+escseq.arg[0]);
1090 break;
1091 case 'F': /* CPL -- Cursor <n> Up and first col */
1092 DEFAULT(escseq.arg[0], 1);
1093 tmoveto(0, term.c.y-escseq.arg[0]);
1094 break;
1095 case 'G': /* CHA -- Move to <col> */
1096 case '`': /* XXX: HPA -- same? */
1097 DEFAULT(escseq.arg[0], 1);
1098 tmoveto(escseq.arg[0]-1, term.c.y);
1099 break;
1100 case 'H': /* CUP -- Move to <row> <col> */
1101 case 'f': /* XXX: HVP -- same? */
1102 DEFAULT(escseq.arg[0], 1);
1103 DEFAULT(escseq.arg[1], 1);
1104 tmoveto(escseq.arg[1]-1, escseq.arg[0]-1);
1105 break;
1106 /* XXX: (CSI n I) CHT -- Cursor Forward Tabulation <n> tab stops */
1107 case 'J': /* ED -- Clear screen */
1108 sel.bx = -1;
1109 switch(escseq.arg[0]) {
1110 case 0: /* below */
1111 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1112 if(term.c.y < term.row-1)
1113 tclearregion(0, term.c.y+1, term.col-1, term.row-1);
1114 break;
1115 case 1: /* above */
1116 if(term.c.y > 1)
1117 tclearregion(0, 0, term.col-1, term.c.y-1);
1118 tclearregion(0, term.c.y, term.c.x, term.c.y);
1119 break;
1120 case 2: /* all */
1121 tclearregion(0, 0, term.col-1, term.row-1);
1122 break;
1123 default:
1124 goto unknown;
1125 }
1126 break;
1127 case 'K': /* EL -- Clear line */
1128 switch(escseq.arg[0]) {
1129 case 0: /* right */
1130 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1131 break;
1132 case 1: /* left */
1133 tclearregion(0, term.c.y, term.c.x, term.c.y);
1134 break;
1135 case 2: /* all */
1136 tclearregion(0, term.c.y, term.col-1, term.c.y);
1137 break;
1138 }
1139 break;
1140 case 'S': /* SU -- Scroll <n> line up */
1141 DEFAULT(escseq.arg[0], 1);
1142 tscrollup(term.top, escseq.arg[0]);
1143 break;
1144 case 'T': /* SD -- Scroll <n> line down */
1145 DEFAULT(escseq.arg[0], 1);
1146 tscrolldown(term.top, escseq.arg[0]);
1147 break;
1148 case 'L': /* IL -- Insert <n> blank lines */
1149 DEFAULT(escseq.arg[0], 1);
1150 tinsertblankline(escseq.arg[0]);
1151 break;
1152 case 'l': /* RM -- Reset Mode */
1153 if(escseq.priv) {
1154 switch(escseq.arg[0]) {
1155 case 1:
1156 term.mode &= ~MODE_APPKEYPAD;
1157 break;
1158 case 5: /* DECSCNM -- Remove reverse video */
1159 if(IS_SET(MODE_REVERSE)) {
1160 term.mode &= ~MODE_REVERSE;
1161 draw();
1162 }
1163 break;
1164 case 7:
1165 term.mode &= ~MODE_WRAP;
1166 break;
1167 case 12: /* att610 -- Stop blinking cursor (IGNORED) */
1168 break;
1169 case 20:
1170 term.mode &= ~MODE_CRLF;
1171 break;
1172 case 25:
1173 term.c.state |= CURSOR_HIDE;
1174 break;
1175 case 1000: /* disable X11 xterm mouse reporting */
1176 term.mode &= ~MODE_MOUSEBTN;
1177 break;
1178 case 1002:
1179 term.mode &= ~MODE_MOUSEMOTION;
1180 break;
1181 case 1049: /* = 1047 and 1048 */
1182 case 47:
1183 case 1047:
1184 if(IS_SET(MODE_ALTSCREEN)) {
1185 tclearregion(0, 0, term.col-1, term.row-1);
1186 tswapscreen();
1187 }
1188 if(escseq.arg[0] != 1049)
1189 break;
1190 case 1048:
1191 tcursor(CURSOR_LOAD);
1192 break;
1193 default:
1194 goto unknown;
1195 }
1196 } else {
1197 switch(escseq.arg[0]) {
1198 case 4:
1199 term.mode &= ~MODE_INSERT;
1200 break;
1201 default:
1202 goto unknown;
1203 }
1204 }
1205 break;
1206 case 'M': /* DL -- Delete <n> lines */
1207 DEFAULT(escseq.arg[0], 1);
1208 tdeleteline(escseq.arg[0]);
1209 break;
1210 case 'X': /* ECH -- Erase <n> char */
1211 DEFAULT(escseq.arg[0], 1);
1212 tclearregion(term.c.x, term.c.y, term.c.x + escseq.arg[0], term.c.y);
1213 break;
1214 case 'P': /* DCH -- Delete <n> char */
1215 DEFAULT(escseq.arg[0], 1);
1216 tdeletechar(escseq.arg[0]);
1217 break;
1218 /* XXX: (CSI n Z) CBT -- Cursor Backward Tabulation <n> tab stops */
1219 case 'd': /* VPA -- Move to <row> */
1220 DEFAULT(escseq.arg[0], 1);
1221 tmoveto(term.c.x, escseq.arg[0]-1);
1222 break;
1223 case 'h': /* SM -- Set terminal mode */
1224 if(escseq.priv) {
1225 switch(escseq.arg[0]) {
1226 case 1:
1227 term.mode |= MODE_APPKEYPAD;
1228 break;
1229 case 5: /* DECSCNM -- Reverve video */
1230 if(!IS_SET(MODE_REVERSE)) {
1231 term.mode |= MODE_REVERSE;
1232 draw();
1233 }
1234 break;
1235 case 7:
1236 term.mode |= MODE_WRAP;
1237 break;
1238 case 20:
1239 term.mode |= MODE_CRLF;
1240 break;
1241 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1242 /* fallthrough for xterm cvvis = CSI [ ? 12 ; 25 h */
1243 if(escseq.narg > 1 && escseq.arg[1] != 25)
1244 break;
1245 case 25:
1246 term.c.state &= ~CURSOR_HIDE;
1247 break;
1248 case 1000: /* 1000,1002: enable xterm mouse report */
1249 term.mode |= MODE_MOUSEBTN;
1250 break;
1251 case 1002:
1252 term.mode |= MODE_MOUSEMOTION;
1253 break;
1254 case 1049: /* = 1047 and 1048 */
1255 case 47:
1256 case 1047:
1257 if(IS_SET(MODE_ALTSCREEN))
1258 tclearregion(0, 0, term.col-1, term.row-1);
1259 else
1260 tswapscreen();
1261 if(escseq.arg[0] != 1049)
1262 break;
1263 case 1048:
1264 tcursor(CURSOR_SAVE);
1265 break;
1266 default: goto unknown;
1267 }
1268 } else {
1269 switch(escseq.arg[0]) {
1270 case 4:
1271 term.mode |= MODE_INSERT;
1272 break;
1273 default: goto unknown;
1274 }
1275 };
1276 break;
1277 case 'm': /* SGR -- Terminal attribute (color) */
1278 tsetattr(escseq.arg, escseq.narg);
1279 break;
1280 case 'r': /* DECSTBM -- Set Scrolling Region */
1281 if(escseq.priv)
1282 goto unknown;
1283 else {
1284 DEFAULT(escseq.arg[0], 1);
1285 DEFAULT(escseq.arg[1], term.row);
1286 tsetscroll(escseq.arg[0]-1, escseq.arg[1]-1);
1287 tmoveto(0, 0);
1288 }
1289 break;
1290 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1291 tcursor(CURSOR_SAVE);
1292 break;
1293 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1294 tcursor(CURSOR_LOAD);
1295 break;
1296 }
1297 }
1298
1299 void
1300 csidump(void) {
1301 int i;
1302 printf("ESC [ %s", escseq.priv ? "? " : "");
1303 if(escseq.narg)
1304 for(i = 0; i < escseq.narg; i++)
1305 printf("%d ", escseq.arg[i]);
1306 if(escseq.mode)
1307 putchar(escseq.mode);
1308 putchar('\n');
1309 }
1310
1311 void
1312 csireset(void) {
1313 memset(&escseq, 0, sizeof(escseq));
1314 }
1315
1316 void
1317 tputtab(void) {
1318 int space = TAB - term.c.x % TAB;
1319 tmoveto(term.c.x + space, term.c.y);
1320 }
1321
1322 void
1323 tputc(char *c) {
1324 char ascii = *c;
1325 if(term.esc & ESC_START) {
1326 if(term.esc & ESC_CSI) {
1327 escseq.buf[escseq.len++] = ascii;
1328 if(BETWEEN(ascii, 0x40, 0x7E) || escseq.len >= ESC_BUF_SIZ) {
1329 term.esc = 0;
1330 csiparse(), csihandle();
1331 }
1332 /* TODO: handle other OSC */
1333 } else if(term.esc & ESC_OSC) {
1334 if(ascii == ';') {
1335 term.titlelen = 0;
1336 term.esc = ESC_START | ESC_TITLE;
1337 }
1338 } else if(term.esc & ESC_TITLE) {
1339 if(ascii == '\a' || term.titlelen+1 >= ESC_TITLE_SIZ) {
1340 term.esc = 0;
1341 term.title[term.titlelen] = '\0';
1342 XStoreName(xw.dpy, xw.win, term.title);
1343 } else {
1344 term.title[term.titlelen++] = ascii;
1345 }
1346 } else if(term.esc & ESC_ALTCHARSET) {
1347 switch(ascii) {
1348 case '0': /* Line drawing crap */
1349 term.c.attr.mode |= ATTR_GFX;
1350 break;
1351 case 'B': /* Back to regular text */
1352 term.c.attr.mode &= ~ATTR_GFX;
1353 break;
1354 default:
1355 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
1356 }
1357 term.esc = 0;
1358 } else {
1359 switch(ascii) {
1360 case '[':
1361 term.esc |= ESC_CSI;
1362 break;
1363 case ']':
1364 term.esc |= ESC_OSC;
1365 break;
1366 case '(':
1367 term.esc |= ESC_ALTCHARSET;
1368 break;
1369 case 'D': /* IND -- Linefeed */
1370 if(term.c.y == term.bot)
1371 tscrollup(term.top, 1);
1372 else
1373 tmoveto(term.c.x, term.c.y+1);
1374 term.esc = 0;
1375 break;
1376 case 'E': /* NEL -- Next line */
1377 tnewline(1); /* always go to first col */
1378 term.esc = 0;
1379 break;
1380 case 'M': /* RI -- Reverse index */
1381 if(term.c.y == term.top)
1382 tscrolldown(term.top, 1);
1383 else
1384 tmoveto(term.c.x, term.c.y-1);
1385 term.esc = 0;
1386 break;
1387 case 'c': /* RIS -- Reset to inital state */
1388 treset();
1389 term.esc = 0;
1390 break;
1391 case '=': /* DECPAM -- Application keypad */
1392 term.mode |= MODE_APPKEYPAD;
1393 term.esc = 0;
1394 break;
1395 case '>': /* DECPNM -- Normal keypad */
1396 term.mode &= ~MODE_APPKEYPAD;
1397 term.esc = 0;
1398 break;
1399 case '7': /* DECSC -- Save Cursor */
1400 tcursor(CURSOR_SAVE);
1401 term.esc = 0;
1402 break;
1403 case '8': /* DECRC -- Restore Cursor */
1404 tcursor(CURSOR_LOAD);
1405 term.esc = 0;
1406 break;
1407 default:
1408 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
1409 (unsigned char) ascii, isprint(ascii)?ascii:'.');
1410 term.esc = 0;
1411 }
1412 }
1413 } else {
1414 if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey)) sel.bx = -1;
1415 switch(ascii) {
1416 case '\t':
1417 tputtab();
1418 break;
1419 case '\b':
1420 tmoveto(term.c.x-1, term.c.y);
1421 break;
1422 case '\r':
1423 tmoveto(0, term.c.y);
1424 break;
1425 case '\f':
1426 case '\v':
1427 case '\n':
1428 /* go to first col if the mode is set */
1429 tnewline(IS_SET(MODE_CRLF));
1430 break;
1431 case '\a':
1432 if(!(xw.state & WIN_FOCUSED))
1433 xseturgency(1);
1434 break;
1435 case '\033':
1436 csireset();
1437 term.esc = ESC_START;
1438 break;
1439 default:
1440 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
1441 tnewline(1); /* always go to first col */
1442 tsetchar(c);
1443 if(term.c.x+1 < term.col)
1444 tmoveto(term.c.x+1, term.c.y);
1445 else
1446 term.c.state |= CURSOR_WRAPNEXT;
1447 }
1448 }
1449 }
1450
1451 int
1452 tresize(int col, int row) {
1453 int i, x;
1454 int minrow = MIN(row, term.row);
1455 int mincol = MIN(col, term.col);
1456 int slide = term.c.y - row + 1;
1457
1458 if(col < 1 || row < 1)
1459 return 0;
1460
1461 /* free unneeded rows */
1462 i = 0;
1463 if(slide > 0) {
1464 /* slide screen to keep cursor where we expect it -
1465 * tscrollup would work here, but we can optimize to
1466 * memmove because we're freeing the earlier lines */
1467 for(/* i = 0 */; i < slide; i++) {
1468 free(term.line[i]);
1469 free(term.alt[i]);
1470 }
1471 memmove(term.line, term.line + slide, row * sizeof(Line));
1472 memmove(term.alt, term.alt + slide, row * sizeof(Line));
1473 }
1474 for(i += row; i < term.row; i++) {
1475 free(term.line[i]);
1476 free(term.alt[i]);
1477 }
1478
1479 /* resize to new height */
1480 term.line = realloc(term.line, row * sizeof(Line));
1481 term.alt = realloc(term.alt, row * sizeof(Line));
1482
1483 /* resize each row to new width, zero-pad if needed */
1484 for(i = 0; i < minrow; i++) {
1485 term.line[i] = realloc(term.line[i], col * sizeof(Glyph));
1486 term.alt[i] = realloc(term.alt[i], col * sizeof(Glyph));
1487 for(x = mincol; x < col; x++) {
1488 term.line[i][x].state = 0;
1489 term.alt[i][x].state = 0;
1490 }
1491 }
1492
1493 /* allocate any new rows */
1494 for(/* i == minrow */; i < row; i++) {
1495 term.line[i] = calloc(col, sizeof(Glyph));
1496 term.alt [i] = calloc(col, sizeof(Glyph));
1497 }
1498
1499 /* update terminal size */
1500 term.col = col, term.row = row;
1501 /* make use of the LIMIT in tmoveto */
1502 tmoveto(term.c.x, term.c.y);
1503 /* reset scrolling region */
1504 tsetscroll(0, row-1);
1505 return (slide > 0);
1506 }
1507
1508 void
1509 xresize(int col, int row) {
1510 Pixmap newbuf;
1511 int oldw, oldh;
1512
1513 oldw = xw.bufw;
1514 oldh = xw.bufh;
1515 xw.bufw = MAX(1, col * xw.cw);
1516 xw.bufh = MAX(1, row * xw.ch);
1517 newbuf = XCreatePixmap(xw.dpy, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dpy, xw.scr));
1518 XCopyArea(xw.dpy, xw.buf, newbuf, dc.gc, 0, 0, xw.bufw, xw.bufh, 0, 0);
1519 XFreePixmap(xw.dpy, xw.buf);
1520 XSetForeground(xw.dpy, dc.gc, dc.col[DefaultBG]);
1521 if(xw.bufw > oldw)
1522 XFillRectangle(xw.dpy, newbuf, dc.gc, oldw, 0,
1523 xw.bufw-oldw, MIN(xw.bufh, oldh));
1524 else if(xw.bufw < oldw && (BORDER > 0 || xw.w > xw.bufw))
1525 XClearArea(xw.dpy, xw.win, BORDER+xw.bufw, BORDER,
1526 xw.w-xw.bufh-BORDER, BORDER+MIN(xw.bufh, oldh),
1527 False);
1528 if(xw.bufh > oldh)
1529 XFillRectangle(xw.dpy, newbuf, dc.gc, 0, oldh,
1530 xw.bufw, xw.bufh-oldh);
1531 else if(xw.bufh < oldh && (BORDER > 0 || xw.h > xw.bufh))
1532 XClearArea(xw.dpy, xw.win, BORDER, BORDER+xw.bufh,
1533 xw.w-2*BORDER, xw.h-xw.bufh-BORDER,
1534 False);
1535 xw.buf = newbuf;
1536 }
1537
1538 void
1539 xloadcols(void) {
1540 int i, r, g, b;
1541 XColor color;
1542 unsigned long white = WhitePixel(xw.dpy, xw.scr);
1543
1544 for(i = 0; i < 16; i++) {
1545 if(!XAllocNamedColor(xw.dpy, xw.cmap, colorname[i], &color, &color)) {
1546 dc.col[i] = white;
1547 fprintf(stderr, "Could not allocate color '%s'\n", colorname[i]);
1548 } else
1549 dc.col[i] = color.pixel;
1550 }
1551
1552 /* same colors as xterm */
1553 for(r = 0; r < 6; r++)
1554 for(g = 0; g < 6; g++)
1555 for(b = 0; b < 6; b++) {
1556 color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
1557 color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
1558 color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
1559 if(!XAllocColor(xw.dpy, xw.cmap, &color)) {
1560 dc.col[i] = white;
1561 fprintf(stderr, "Could not allocate color %d\n", i);
1562 } else
1563 dc.col[i] = color.pixel;
1564 i++;
1565 }
1566
1567 for(r = 0; r < 24; r++, i++) {
1568 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
1569 if (!XAllocColor(xw.dpy, xw.cmap, &color)) {
1570 dc.col[i] = white;
1571 fprintf(stderr, "Could not allocate color %d\n", i);
1572 } else
1573 dc.col[i] = color.pixel;
1574 }
1575 }
1576
1577 void
1578 xclear(int x1, int y1, int x2, int y2) {
1579 XSetForeground(xw.dpy, dc.gc, dc.col[IS_SET(MODE_REVERSE) ? DefaultFG : DefaultBG]);
1580 XFillRectangle(xw.dpy, xw.buf, dc.gc,
1581 x1 * xw.cw, y1 * xw.ch,
1582 (x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch);
1583 }
1584
1585 void
1586 xhints(void) {
1587 XClassHint class = {opt_class ? opt_class : TNAME, TNAME};
1588 XWMHints wm = {.flags = InputHint, .input = 1};
1589 XSizeHints size = {
1590 .flags = PSize | PResizeInc | PBaseSize,
1591 .height = xw.h,
1592 .width = xw.w,
1593 .height_inc = xw.ch,
1594 .width_inc = xw.cw,
1595 .base_height = 2*BORDER,
1596 .base_width = 2*BORDER,
1597 };
1598 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, &size, &wm, &class);
1599 }
1600
1601 XFontSet
1602 xinitfont(char *fontstr) {
1603 XFontSet set;
1604 char *def, **missing;
1605 int n;
1606
1607 missing = NULL;
1608 set = XCreateFontSet(xw.dpy, fontstr, &missing, &n, &def);
1609 if(missing) {
1610 while(n--)
1611 fprintf(stderr, "st: missing fontset: %s\n", missing[n]);
1612 XFreeStringList(missing);
1613 }
1614 return set;
1615 }
1616
1617 void
1618 xgetfontinfo(XFontSet set, int *ascent, int *descent, short *lbearing, short *rbearing) {
1619 XFontStruct **xfonts;
1620 char **font_names;
1621 int i, n;
1622
1623 *ascent = *descent = *lbearing = *rbearing = 0;
1624 n = XFontsOfFontSet(set, &xfonts, &font_names);
1625 for(i = 0; i < n; i++) {
1626 *ascent = MAX(*ascent, (*xfonts)->ascent);
1627 *descent = MAX(*descent, (*xfonts)->descent);
1628 *lbearing = MAX(*lbearing, (*xfonts)->min_bounds.lbearing);
1629 *rbearing = MAX(*rbearing, (*xfonts)->max_bounds.rbearing);
1630 xfonts++;
1631 }
1632 }
1633
1634 void
1635 initfonts(char *fontstr, char *bfontstr) {
1636 if((dc.font.set = xinitfont(fontstr)) == NULL ||
1637 (dc.bfont.set = xinitfont(bfontstr)) == NULL)
1638 die("Can't load font %s\n", dc.font.set ? BOLDFONT : FONT);
1639 xgetfontinfo(dc.font.set, &dc.font.ascent, &dc.font.descent,
1640 &dc.font.lbearing, &dc.font.rbearing);
1641 xgetfontinfo(dc.bfont.set, &dc.bfont.ascent, &dc.bfont.descent,
1642 &dc.bfont.lbearing, &dc.bfont.rbearing);
1643 }
1644
1645 void
1646 xinit(void) {
1647 XSetWindowAttributes attrs;
1648 Cursor cursor;
1649 Window parent;
1650
1651 if(!(xw.dpy = XOpenDisplay(NULL)))
1652 die("Can't open display\n");
1653 xw.scr = XDefaultScreen(xw.dpy);
1654
1655 /* font */
1656 initfonts(FONT, BOLDFONT);
1657
1658 /* XXX: Assuming same size for bold font */
1659 xw.cw = dc.font.rbearing - dc.font.lbearing;
1660 xw.ch = dc.font.ascent + dc.font.descent;
1661
1662 /* colors */
1663 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
1664 xloadcols();
1665
1666 /* window - default size */
1667 xw.bufh = term.row * xw.ch;
1668 xw.bufw = term.col * xw.cw;
1669 xw.h = xw.bufh + 2*BORDER;
1670 xw.w = xw.bufw + 2*BORDER;
1671
1672 attrs.background_pixel = dc.col[DefaultBG];
1673 attrs.border_pixel = dc.col[DefaultBG];
1674 attrs.bit_gravity = NorthWestGravity;
1675 attrs.event_mask = FocusChangeMask | KeyPressMask
1676 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
1677 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask
1678 | EnterWindowMask | LeaveWindowMask;
1679 attrs.colormap = xw.cmap;
1680
1681 parent = opt_embed ? strtol(opt_embed, NULL, 0) : XRootWindow(xw.dpy, xw.scr);
1682 xw.win = XCreateWindow(xw.dpy, parent, 0, 0,
1683 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
1684 XDefaultVisual(xw.dpy, xw.scr),
1685 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
1686 | CWColormap,
1687 &attrs);
1688 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dpy, xw.scr));
1689
1690
1691 /* input methods */
1692 xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL);
1693 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
1694 | XIMStatusNothing, XNClientWindow, xw.win,
1695 XNFocusWindow, xw.win, NULL);
1696 /* gc */
1697 dc.gc = XCreateGC(xw.dpy, xw.win, 0, NULL);
1698
1699 /* white cursor, black outline */
1700 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
1701 XDefineCursor(xw.dpy, xw.win, cursor);
1702 XRecolorCursor(xw.dpy, cursor,
1703 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
1704 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
1705
1706 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
1707
1708 XStoreName(xw.dpy, xw.win, opt_title ? opt_title : "st");
1709 XMapWindow(xw.dpy, xw.win);
1710 xhints();
1711 XSync(xw.dpy, 0);
1712 }
1713
1714 void
1715 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
1716 unsigned long xfg = dc.col[base.fg], xbg = dc.col[base.bg], temp;
1717 int winx = x*xw.cw, winy = y*xw.ch + dc.font.ascent, width = charlen*xw.cw;
1718 int i;
1719
1720 /* only switch default fg/bg if term is in RV mode */
1721 if(IS_SET(MODE_REVERSE)) {
1722 if(base.fg == DefaultFG)
1723 xfg = dc.col[DefaultBG];
1724 if(base.bg == DefaultBG)
1725 xbg = dc.col[DefaultFG];
1726 }
1727
1728 if(base.mode & ATTR_REVERSE)
1729 temp = xfg, xfg = xbg, xbg = temp;
1730
1731 XSetBackground(xw.dpy, dc.gc, xbg);
1732 XSetForeground(xw.dpy, dc.gc, xfg);
1733
1734 if(base.mode & ATTR_GFX) {
1735 for(i = 0; i < bytelen; i++) {
1736 char c = gfx[(unsigned int)s[i] % 256];
1737 if(c)
1738 s[i] = c;
1739 else if(s[i] > 0x5f)
1740 s[i] -= 0x5f;
1741 }
1742 }
1743
1744 XmbDrawImageString(xw.dpy, xw.buf, base.mode & ATTR_BOLD ? dc.bfont.set : dc.font.set,
1745 dc.gc, winx, winy, s, bytelen);
1746
1747 if(base.mode & ATTR_UNDERLINE)
1748 XDrawLine(xw.dpy, xw.buf, dc.gc, winx, winy+1, winx+width-1, winy+1);
1749 }
1750
1751 void
1752 xdrawcursor(void) {
1753 static int oldx = 0;
1754 static int oldy = 0;
1755 int sl;
1756 Glyph g = {{' '}, ATTR_NULL, DefaultBG, DefaultCS, 0};
1757
1758 LIMIT(oldx, 0, term.col-1);
1759 LIMIT(oldy, 0, term.row-1);
1760
1761 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
1762 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
1763
1764 /* remove the old cursor */
1765 if(term.line[oldy][oldx].state & GLYPH_SET) {
1766 sl = utf8size(term.line[oldy][oldx].c);
1767 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx, oldy, 1, sl);
1768 } else
1769 xclear(oldx, oldy, oldx, oldy);
1770
1771 /* draw the new one */
1772 if(!(term.c.state & CURSOR_HIDE) && (xw.state & WIN_FOCUSED)) {
1773 sl = utf8size(g.c);
1774 if(IS_SET(MODE_REVERSE))
1775 g.mode |= ATTR_REVERSE, g.fg = DefaultCS, g.bg = DefaultFG;
1776 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
1777 oldx = term.c.x, oldy = term.c.y;
1778 }
1779 }
1780
1781 void
1782 draw() {
1783 drawregion(0, 0, term.col, term.row);
1784 }
1785
1786 void
1787 drawregion(int x1, int y1, int x2, int y2) {
1788 int ic, ib, x, y, ox, sl;
1789 Glyph base, new;
1790 char buf[DRAW_BUF_SIZ];
1791
1792 if(!(xw.state & WIN_VISIBLE))
1793 return;
1794
1795 xclear(x1, y1, x2-1, y2-1);
1796 for(y = y1; y < y2; y++) {
1797 base = term.line[y][0];
1798 ic = ib = ox = 0;
1799 for(x = x1; x < x2; x++) {
1800 new = term.line[y][x];
1801 if(sel.bx != -1 && *(new.c) && selected(x, y))
1802 new.mode ^= ATTR_REVERSE;
1803 if(ib > 0 && (!(new.state & GLYPH_SET) || ATTRCMP(base, new) ||
1804 ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
1805 xdraws(buf, base, ox, y, ic, ib);
1806 ic = ib = 0;
1807 }
1808 if(new.state & GLYPH_SET) {
1809 if(ib == 0) {
1810 ox = x;
1811 base = new;
1812 }
1813 sl = utf8size(new.c);
1814 memcpy(buf+ib, new.c, sl);
1815 ib += sl;
1816 ++ic;
1817 }
1818 }
1819 if(ib > 0)
1820 xdraws(buf, base, ox, y, ic, ib);
1821 }
1822 xdrawcursor();
1823 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.bufw, xw.bufh, BORDER, BORDER);
1824 }
1825
1826 void
1827 expose(XEvent *ev) {
1828 XExposeEvent *e = &ev->xexpose;
1829 if(xw.state & WIN_REDRAW) {
1830 if(!e->count) {
1831 xw.state &= ~WIN_REDRAW;
1832 draw();
1833 }
1834 } else
1835 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, e->x-BORDER, e->y-BORDER,
1836 e->width, e->height, e->x, e->y);
1837 }
1838
1839 void
1840 visibility(XEvent *ev) {
1841 XVisibilityEvent *e = &ev->xvisibility;
1842 if(e->state == VisibilityFullyObscured)
1843 xw.state &= ~WIN_VISIBLE;
1844 else if(!(xw.state & WIN_VISIBLE))
1845 /* need a full redraw for next Expose, not just a buf copy */
1846 xw.state |= WIN_VISIBLE | WIN_REDRAW;
1847 }
1848
1849 void
1850 unmap(XEvent *ev) {
1851 xw.state &= ~WIN_VISIBLE;
1852 }
1853
1854 void
1855 xseturgency(int add) {
1856 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
1857 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
1858 XSetWMHints(xw.dpy, xw.win, h);
1859 XFree(h);
1860 }
1861
1862 void
1863 focus(XEvent *ev) {
1864 if(ev->type == FocusIn) {
1865 xw.state |= WIN_FOCUSED;
1866 xseturgency(0);
1867 } else
1868 xw.state &= ~WIN_FOCUSED;
1869 draw();
1870 }
1871
1872 char*
1873 kmap(KeySym k, unsigned int state) {
1874 int i;
1875 state &= ~Mod2Mask;
1876 for(i = 0; i < LEN(key); i++) {
1877 unsigned int mask = key[i].mask;
1878 if(key[i].k == k && ((state & mask) == mask || (mask == XK_NO_MOD && !state)))
1879 return (char*)key[i].s;
1880 }
1881 return NULL;
1882 }
1883
1884 void
1885 kpress(XEvent *ev) {
1886 XKeyEvent *e = &ev->xkey;
1887 KeySym ksym;
1888 char buf[32];
1889 char *customkey;
1890 int len;
1891 int meta;
1892 int shift;
1893 Status status;
1894
1895 meta = e->state & Mod1Mask;
1896 shift = e->state & ShiftMask;
1897 len = XmbLookupString(xw.xic, e, buf, sizeof(buf), &ksym, &status);
1898
1899 /* 1. custom keys from config.h */
1900 if((customkey = kmap(ksym, e->state)))
1901 ttywrite(customkey, strlen(customkey));
1902 /* 2. hardcoded (overrides X lookup) */
1903 else
1904 switch(ksym) {
1905 case XK_Up:
1906 case XK_Down:
1907 case XK_Left:
1908 case XK_Right:
1909 /* XXX: shift up/down doesn't work */
1910 sprintf(buf, "\033%c%c", IS_SET(MODE_APPKEYPAD) ? 'O' : '[', (shift ? "dacb":"DACB")[ksym - XK_Left]);
1911 ttywrite(buf, 3);
1912 break;
1913 case XK_Insert:
1914 if(shift)
1915 selpaste();
1916 break;
1917 case XK_Return:
1918 if(IS_SET(MODE_CRLF))
1919 ttywrite("\r\n", 2);
1920 else
1921 ttywrite("\r", 1);
1922 break;
1923 /* 3. X lookup */
1924 default:
1925 if(len > 0) {
1926 if(meta && len == 1)
1927 ttywrite("\033", 1);
1928 ttywrite(buf, len);
1929 }
1930 break;
1931 }
1932 }
1933
1934 void
1935 cmessage(XEvent *e) {
1936 /* See xembed specs
1937 http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html */
1938 if (e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
1939 if (e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
1940 xw.state |= WIN_FOCUSED;
1941 xseturgency(0);
1942 } else if (e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
1943 xw.state &= ~WIN_FOCUSED;
1944 }
1945 draw();
1946 }
1947 }
1948
1949 void
1950 resize(XEvent *e) {
1951 int col, row;
1952
1953 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
1954 return;
1955
1956 xw.w = e->xconfigure.width;
1957 xw.h = e->xconfigure.height;
1958 col = (xw.w - 2*BORDER) / xw.cw;
1959 row = (xw.h - 2*BORDER) / xw.ch;
1960 if(col == term.col && row == term.row)
1961 return;
1962 if(tresize(col, row))
1963 draw();
1964 ttyresize(col, row);
1965 xresize(col, row);
1966 }
1967
1968 void
1969 run(void) {
1970 XEvent ev;
1971 fd_set rfd;
1972 int xfd = XConnectionNumber(xw.dpy);
1973
1974 for(;;) {
1975 FD_ZERO(&rfd);
1976 FD_SET(cmdfd, &rfd);
1977 FD_SET(xfd, &rfd);
1978 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, NULL) < 0) {
1979 if(errno == EINTR)
1980 continue;
1981 die("select failed: %s\n", SERRNO);
1982 }
1983 if(FD_ISSET(cmdfd, &rfd)) {
1984 ttyread();
1985 draw();
1986 }
1987 while(XPending(xw.dpy)) {
1988 XNextEvent(xw.dpy, &ev);
1989 if(XFilterEvent(&ev, xw.win))
1990 continue;
1991 if(handler[ev.type])
1992 (handler[ev.type])(&ev);
1993 }
1994 }
1995 }
1996
1997 int
1998 main(int argc, char *argv[]) {
1999 int i;
2000
2001 for(i = 1; i < argc; i++) {
2002 switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
2003 case 't':
2004 if(++i < argc) opt_title = argv[i];
2005 break;
2006 case 'c':
2007 if(++i < argc) opt_class = argv[i];
2008 break;
2009 case 'w':
2010 if(++i < argc) opt_embed = argv[i];
2011 break;
2012 case 'e':
2013 /* eat every remaining arguments */
2014 if(++i < argc) opt_cmd = &argv[i];
2015 goto run;
2016 case 'v':
2017 default:
2018 die(USAGE);
2019 }
2020 }
2021
2022 run:
2023 setlocale(LC_CTYPE, "");
2024 tnew(80, 24);
2025 ttynew();
2026 xinit();
2027 selinit();
2028 run();
2029 return 0;
2030 }