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[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/Xlib.h>
20 #include <X11/keysym.h>
21 #include <X11/Xutil.h>
22
23 #if defined(__linux)
24 #include <pty.h>
25 #elif defined(__OpenBSD__) || defined(__NetBSD__)
26 #include <util.h>
27 #elif defined(__FreeBSD__) || defined(__DragonFly__)
28 #include <libutil.h>
29 #endif
30
31 /* Arbitrary sizes */
32 #define ESC_TITLE_SIZ 256
33 #define ESC_BUF_SIZ 256
34 #define ESC_ARG_SIZ 16
35 #define DRAW_BUF_SIZ 1024
36
37 #define SERRNO strerror(errno)
38 #define MIN(a, b) ((a) < (b) ? (a) : (b))
39 #define MAX(a, b) ((a) < (b) ? (b) : (a))
40 #define LEN(a) (sizeof(a) / sizeof(a[0]))
41 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
42 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
43 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
44 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
45 #define IS_SET(flag) (term.mode & (flag))
46
47 /* Attribute, Cursor, Character state, Terminal mode, Screen draw mode */
48 enum { ATTR_NULL=0 , ATTR_REVERSE=1 , ATTR_UNDERLINE=2, ATTR_BOLD=4, ATTR_GFX=8 };
49 enum { CURSOR_UP, CURSOR_DOWN, CURSOR_LEFT, CURSOR_RIGHT,
50 CURSOR_SAVE, CURSOR_LOAD };
51 enum { CURSOR_DEFAULT = 0, CURSOR_HIDE = 1, CURSOR_WRAPNEXT = 2 };
52 enum { GLYPH_SET=1, GLYPH_DIRTY=2 };
53 enum { MODE_WRAP=1, MODE_INSERT=2, MODE_APPKEYPAD=4, MODE_ALTSCREEN=8 };
54 enum { ESC_START=1, ESC_CSI=2, ESC_OSC=4, ESC_TITLE=8, ESC_ALTCHARSET=16 };
55 enum { SCREEN_UPDATE, SCREEN_REDRAW };
56
57 typedef struct {
58 char c; /* character code */
59 char mode; /* attribute flags */
60 int fg; /* foreground */
61 int bg; /* background */
62 char state; /* state flags */
63 } Glyph;
64
65 typedef Glyph* Line;
66
67 typedef struct {
68 Glyph attr; /* current char attributes */
69 int x;
70 int y;
71 char state;
72 } TCursor;
73
74 /* CSI Escape sequence structs */
75 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
76 typedef struct {
77 char buf[ESC_BUF_SIZ]; /* raw string */
78 int len; /* raw string length */
79 char priv;
80 int arg[ESC_ARG_SIZ];
81 int narg; /* nb of args */
82 char mode;
83 } CSIEscape;
84
85 /* Internal representation of the screen */
86 typedef struct {
87 int row; /* nb row */
88 int col; /* nb col */
89 Line* line; /* screen */
90 Line* alt; /* alternate screen */
91 TCursor c; /* cursor */
92 int top; /* top scroll limit */
93 int bot; /* bottom scroll limit */
94 int mode; /* terminal mode flags */
95 int esc; /* escape state flags */
96 char title[ESC_TITLE_SIZ];
97 int titlelen;
98 } Term;
99
100 /* Purely graphic info */
101 typedef struct {
102 Display* dis;
103 Window win;
104 Pixmap buf;
105 int scr;
106 int w; /* window width */
107 int h; /* window height */
108 int bufw; /* pixmap width */
109 int bufh; /* pixmap height */
110 int ch; /* char height */
111 int cw; /* char width */
112 int hasfocus;
113 } XWindow;
114
115 typedef struct {
116 KeySym k;
117 char s[ESC_BUF_SIZ];
118 } Key;
119
120 /* Drawing Context */
121 typedef struct {
122 unsigned long col[256];
123 XFontStruct* font;
124 XFontStruct* bfont;
125 GC gc;
126 } DC;
127
128 /* TODO: use better name for vars... */
129 typedef struct {
130 int mode;
131 int bx, by;
132 int ex, ey;
133 struct {int x, y;} b, e;
134 char *clip;
135 } Selection;
136
137 #include "config.h"
138
139 static void die(const char *errstr, ...);
140 static void draw(int);
141 static void execsh(void);
142 static void sigchld(int);
143 static void run(void);
144
145 static void csidump(void);
146 static void csihandle(void);
147 static void csiparse(void);
148 static void csireset(void);
149
150 static void tclearregion(int, int, int, int);
151 static void tcursor(int);
152 static void tdeletechar(int);
153 static void tdeleteline(int);
154 static void tinsertblank(int);
155 static void tinsertblankline(int);
156 static void tmoveto(int, int);
157 static void tnew(int, int);
158 static void tnewline(void);
159 static void tputtab(void);
160 static void tputc(char);
161 static void tputs(char*, int);
162 static void treset(void);
163 static void tresize(int, int);
164 static void tscrollup(int);
165 static void tscrolldown(int);
166 static void tsetattr(int*, int);
167 static void tsetchar(char);
168 static void tsetscroll(int, int);
169 static void tswapscreen(void);
170
171 static void ttynew(void);
172 static void ttyread(void);
173 static void ttyresize(int, int);
174 static void ttywrite(const char *, size_t);
175
176 static void xdraws(char *, Glyph, int, int, int);
177 static void xhints(void);
178 static void xclear(int, int, int, int);
179 static void xdrawcursor(void);
180 static void xinit(void);
181 static void xloadcols(void);
182 static void xseturgency(int);
183
184 static void expose(XEvent *);
185 static char* kmap(KeySym);
186 static void kpress(XEvent *);
187 static void resize(XEvent *);
188 static void focus(XEvent *);
189 static void brelease(XEvent *);
190 static void bpress(XEvent *);
191 static void bmotion(XEvent *);
192
193
194 static void (*handler[LASTEvent])(XEvent *) = {
195 [KeyPress] = kpress,
196 [Expose] = expose,
197 [ConfigureNotify] = resize,
198 [FocusIn] = focus,
199 [FocusOut] = focus,
200 [MotionNotify] = bmotion,
201 [ButtonPress] = bpress,
202 [ButtonRelease] = brelease,
203 };
204
205 /* Globals */
206 static DC dc;
207 static XWindow xw;
208 static Term term;
209 static CSIEscape escseq;
210 static int cmdfd;
211 static pid_t pid;
212 static Selection sel;
213
214 void
215 selinit(void) {
216 sel.mode = 0;
217 sel.bx = -1;
218 sel.clip = NULL;
219 }
220
221 static inline int selected(int x, int y) {
222 if(sel.ey == y && sel.by == y) {
223 int bx = MIN(sel.bx, sel.ex);
224 int ex = MAX(sel.bx, sel.ex);
225 return BETWEEN(x, bx, ex);
226 }
227 return ((sel.b.y < y&&y < sel.e.y) || (y==sel.e.y && x<=sel.e.x))
228 || (y==sel.b.y && x>=sel.b.x && (x<=sel.e.x || sel.b.y!=sel.e.y));
229 }
230
231 static void getbuttoninfo(XEvent *e, int *b, int *x, int *y) {
232 if(b) *b = e->xbutton.state,
233 *b=*b==4096?5:*b==2048?4:*b==1024?3:*b==512?2:*b==256?1:-1;
234 *x = e->xbutton.x/xw.cw;
235 *y = e->xbutton.y/xw.ch;
236 sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
237 sel.b.y = MIN(sel.by, sel.ey);
238 sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
239 sel.e.y = MAX(sel.by, sel.ey);
240 }
241
242 static void bpress(XEvent *e) {
243 sel.mode = 1;
244 sel.ex = sel.bx = e->xbutton.x/xw.cw;
245 sel.ey = sel.by = e->xbutton.y/xw.ch;
246 }
247
248 static char *getseltext() {
249 char *str, *ptr;
250 int ls, x, y, sz;
251 if(sel.bx == -1)
252 return NULL;
253 sz = (term.col+1) * (sel.e.y-sel.b.y+1);
254 ptr = str = malloc(sz);
255 for(y = 0; y < term.row; y++) {
256 for(x = 0; x < term.col; x++)
257 if(term.line[y][x].state & GLYPH_SET && (ls = selected(x, y)))
258 *ptr = term.line[y][x].c, ptr++;
259 if(ls)
260 *ptr = '\n', ptr++;
261 }
262 *ptr = 0;
263 return str;
264 }
265
266 /* TODO: use X11 clipboard */
267 static void selcopy(char *str) {
268 free(sel.clip);
269 sel.clip = str;
270 }
271
272 static void selpaste() {
273 if(sel.clip)
274 ttywrite(sel.clip, strlen(sel.clip));
275 }
276
277 /* TODO: doubleclick to select word */
278 static void brelease(XEvent *e) {
279 int b;
280 sel.mode = 0;
281 getbuttoninfo(e, &b, &sel.ex, &sel.ey);
282 if(sel.bx==sel.ex && sel.by==sel.ey) {
283 sel.bx = -1;
284 if(b==2)
285 selpaste();
286 } else {
287 if(b==1)
288 selcopy(getseltext());
289 }
290 draw(1);
291 }
292
293 static void bmotion(XEvent *e) {
294 if (sel.mode) {
295 getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
296 draw(1);
297 }
298 }
299
300 #ifdef DEBUG
301 void
302 tdump(void) {
303 int row, col;
304 Glyph c;
305
306 for(row = 0; row < term.row; row++) {
307 for(col = 0; col < term.col; col++) {
308 if(col == term.c.x && row == term.c.y)
309 putchar('#');
310 else {
311 c = term.line[row][col];
312 putchar(c.state & GLYPH_SET ? c.c : '.');
313 }
314 }
315 putchar('\n');
316 }
317 }
318 #endif
319
320 void
321 die(const char *errstr, ...) {
322 va_list ap;
323
324 va_start(ap, errstr);
325 vfprintf(stderr, errstr, ap);
326 va_end(ap);
327 exit(EXIT_FAILURE);
328 }
329
330 void
331 execsh(void) {
332 char *args[3] = {getenv("SHELL"), "-i", NULL};
333 DEFAULT(args[0], SHELL); /* if getenv() failed */
334 putenv("TERM=" TNAME);
335 execvp(args[0], args);
336 }
337
338 void
339 sigchld(int a) {
340 int stat = 0;
341 if(waitpid(pid, &stat, 0) < 0)
342 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
343 if(WIFEXITED(stat))
344 exit(WEXITSTATUS(stat));
345 else
346 exit(EXIT_FAILURE);
347 }
348
349 void
350 ttynew(void) {
351 int m, s;
352
353 /* seems to work fine on linux, openbsd and freebsd */
354 struct winsize w = {term.row, term.col, 0, 0};
355 if(openpty(&m, &s, NULL, NULL, &w) < 0)
356 die("openpty failed: %s\n", SERRNO);
357
358 switch(pid = fork()) {
359 case -1:
360 die("fork failed\n");
361 break;
362 case 0:
363 setsid(); /* create a new process group */
364 dup2(s, STDIN_FILENO);
365 dup2(s, STDOUT_FILENO);
366 dup2(s, STDERR_FILENO);
367 if(ioctl(s, TIOCSCTTY, NULL) < 0)
368 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
369 close(s);
370 close(m);
371 execsh();
372 break;
373 default:
374 close(s);
375 cmdfd = m;
376 signal(SIGCHLD, sigchld);
377 }
378 }
379
380 void
381 dump(char c) {
382 static int col;
383 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
384 if(++col % 10 == 0)
385 fprintf(stderr, "\n");
386 }
387
388 void
389 ttyread(void) {
390 char buf[BUFSIZ];
391 int ret;
392
393 if((ret = read(cmdfd, buf, LEN(buf))) < 0)
394 die("Couldn't read from shell: %s\n", SERRNO);
395 else {
396 printf("ttyread %d\n", ret);
397 tputs(buf, ret);
398 }
399 }
400
401 void
402 ttywrite(const char *s, size_t n) {
403 if(write(cmdfd, s, n) == -1)
404 die("write error on tty: %s\n", SERRNO);
405 }
406
407 void
408 ttyresize(int x, int y) {
409 struct winsize w;
410
411 w.ws_row = term.row;
412 w.ws_col = term.col;
413 w.ws_xpixel = w.ws_ypixel = 0;
414 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
415 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
416 }
417
418 void
419 tcursor(int mode) {
420 static TCursor c;
421
422 if(mode == CURSOR_SAVE)
423 c = term.c;
424 else if(mode == CURSOR_LOAD)
425 term.c = c, tmoveto(c.x, c.y);
426 }
427
428 void
429 treset(void) {
430 term.c = (TCursor){{
431 .mode = ATTR_NULL,
432 .fg = DefaultFG,
433 .bg = DefaultBG
434 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
435
436 term.top = 0, term.bot = term.row - 1;
437 term.mode = MODE_WRAP;
438 tclearregion(0, 0, term.col-1, term.row-1);
439 }
440
441 void
442 tnew(int col, int row) {
443 /* set screen size */
444 term.row = row, term.col = col;
445 term.line = malloc(term.row * sizeof(Line));
446 term.alt = malloc(term.row * sizeof(Line));
447 for(row = 0 ; row < term.row; row++) {
448 term.line[row] = malloc(term.col * sizeof(Glyph));
449 term.alt [row] = malloc(term.col * sizeof(Glyph));
450 }
451 /* setup screen */
452 treset();
453 }
454
455 void
456 tswapscreen(void) {
457 Line* tmp = term.line;
458 term.line = term.alt;
459 term.alt = tmp;
460 term.mode ^= MODE_ALTSCREEN;
461 }
462
463 void
464 tscrolldown (int n) {
465 int i;
466 Line temp;
467
468 LIMIT(n, 0, term.bot-term.top+1);
469
470 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
471
472 for(i = term.bot; i >= term.top+n; i--) {
473 temp = term.line[i];
474 term.line[i] = term.line[i-n];
475 term.line[i-n] = temp;
476 }
477 }
478
479 void
480 tscrollup (int n) {
481 int i;
482 Line temp;
483 LIMIT(n, 0, term.bot-term.top+1);
484
485 tclearregion(0, term.top, term.col-1, term.top+n-1);
486
487 for(i = term.top; i <= term.bot-n; i++) {
488 temp = term.line[i];
489 term.line[i] = term.line[i+n];
490 term.line[i+n] = temp;
491 }
492 }
493
494 void
495 tnewline(void) {
496 int y = term.c.y + 1;
497 if(y > term.bot)
498 tscrollup(1), y = term.bot;
499 tmoveto(0, y);
500 }
501
502 void
503 csiparse(void) {
504 /* int noarg = 1; */
505 char *p = escseq.buf;
506
507 escseq.narg = 0;
508 if(*p == '?')
509 escseq.priv = 1, p++;
510
511 while(p < escseq.buf+escseq.len) {
512 while(isdigit(*p)) {
513 escseq.arg[escseq.narg] *= 10;
514 escseq.arg[escseq.narg] += *p++ - '0'/*, noarg = 0 */;
515 }
516 if(*p == ';' && escseq.narg+1 < ESC_ARG_SIZ)
517 escseq.narg++, p++;
518 else {
519 escseq.mode = *p;
520 escseq.narg++;
521 return;
522 }
523 }
524 }
525
526 void
527 tmoveto(int x, int y) {
528 LIMIT(x, 0, term.col-1);
529 LIMIT(y, 0, term.row-1);
530 term.c.state &= ~CURSOR_WRAPNEXT;
531 term.c.x = x;
532 term.c.y = y;
533 }
534
535 void
536 tsetchar(char c) {
537 term.line[term.c.y][term.c.x] = term.c.attr;
538 term.line[term.c.y][term.c.x].c = c;
539 term.line[term.c.y][term.c.x].state |= GLYPH_SET;
540 }
541
542 void
543 tclearregion(int x1, int y1, int x2, int y2) {
544 int y, temp;
545
546 if(x1 > x2)
547 temp = x1, x1 = x2, x2 = temp;
548 if(y1 > y2)
549 temp = y1, y1 = y2, y2 = temp;
550
551 LIMIT(x1, 0, term.col-1);
552 LIMIT(x2, 0, term.col-1);
553 LIMIT(y1, 0, term.row-1);
554 LIMIT(y2, 0, term.row-1);
555
556 for(y = y1; y <= y2; y++)
557 memset(&term.line[y][x1], 0, sizeof(Glyph)*(x2-x1+1));
558 }
559
560 void
561 tdeletechar(int n) {
562 int src = term.c.x + n;
563 int dst = term.c.x;
564 int size = term.col - src;
565
566 if(src >= term.col) {
567 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
568 return;
569 }
570 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
571 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
572 }
573
574 void
575 tinsertblank(int n) {
576 int src = term.c.x;
577 int dst = src + n;
578 int size = term.col - dst;
579
580 if(dst >= term.col) {
581 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
582 return;
583 }
584 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
585 tclearregion(src, term.c.y, dst - 1, term.c.y);
586 }
587
588 void
589 tinsertblankline(int n) {
590 int i;
591 Line blank;
592 int bot = term.bot;
593
594 if(term.c.y < term.top || term.c.y > term.bot)
595 return;
596
597 LIMIT(n, 0, bot-term.c.y+1);
598 tclearregion(0, bot-n+1, term.col-1, bot);
599 for(i = bot; i >= term.c.y+n; i--) {
600 /* swap deleted line <-> blanked line */
601 blank = term.line[i];
602 term.line[i] = term.line[i-n];
603 term.line[i-n] = blank;
604 }
605 }
606
607 void
608 tdeleteline(int n) {
609 int i;
610 Line blank;
611 int bot = term.bot;
612
613 if(term.c.y < term.top || term.c.y > term.bot)
614 return;
615
616 LIMIT(n, 0, bot-term.c.y+1);
617 tclearregion(0, term.c.y, term.col-1, term.c.y+n-1);
618 for(i = term.c.y; i <= bot-n; i++) {
619 /* swap deleted line <-> blanked line */
620 blank = term.line[i];
621 term.line[i] = term.line[i+n];
622 term.line[i+n] = blank;
623 }
624 }
625
626 void
627 tsetattr(int *attr, int l) {
628 int i;
629
630 for(i = 0; i < l; i++) {
631 switch(attr[i]) {
632 case 0:
633 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD);
634 term.c.attr.fg = DefaultFG;
635 term.c.attr.bg = DefaultBG;
636 break;
637 case 1:
638 term.c.attr.mode |= ATTR_BOLD;
639 break;
640 case 4:
641 term.c.attr.mode |= ATTR_UNDERLINE;
642 break;
643 case 7:
644 term.c.attr.mode |= ATTR_REVERSE;
645 break;
646 case 22:
647 term.c.attr.mode &= ~ATTR_BOLD;
648 break;
649 case 24:
650 term.c.attr.mode &= ~ATTR_UNDERLINE;
651 break;
652 case 27:
653 term.c.attr.mode &= ~ATTR_REVERSE;
654 break;
655 case 38:
656 if (i + 2 < l && attr[i + 1] == 5) {
657 i += 2;
658 if (BETWEEN(attr[i], 0, 255))
659 term.c.attr.fg = attr[i];
660 else
661 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[i]);
662 }
663 else
664 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
665 break;
666 case 39:
667 term.c.attr.fg = DefaultFG;
668 break;
669 case 48:
670 if (i + 2 < l && attr[i + 1] == 5) {
671 i += 2;
672 if (BETWEEN(attr[i], 0, 255))
673 term.c.attr.bg = attr[i];
674 else
675 fprintf(stderr, "erresc: bad bgcolor %d\n", attr[i]);
676 }
677 else
678 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
679 break;
680 case 49:
681 term.c.attr.bg = DefaultBG;
682 break;
683 default:
684 if(BETWEEN(attr[i], 30, 37))
685 term.c.attr.fg = attr[i] - 30;
686 else if(BETWEEN(attr[i], 40, 47))
687 term.c.attr.bg = attr[i] - 40;
688 else if(BETWEEN(attr[i], 90, 97))
689 term.c.attr.fg = attr[i] - 90 + 8;
690 else if(BETWEEN(attr[i], 100, 107))
691 term.c.attr.fg = attr[i] - 100 + 8;
692 else
693 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
694 break;
695 }
696 }
697 }
698
699 void
700 tsetscroll(int t, int b) {
701 int temp;
702
703 LIMIT(t, 0, term.row-1);
704 LIMIT(b, 0, term.row-1);
705 if(t > b) {
706 temp = t;
707 t = b;
708 b = temp;
709 }
710 term.top = t;
711 term.bot = b;
712 }
713
714 void
715 csihandle(void) {
716 switch(escseq.mode) {
717 default:
718 unknown:
719 printf("erresc: unknown csi ");
720 csidump();
721 /* die(""); */
722 break;
723 case '@': /* ICH -- Insert <n> blank char */
724 DEFAULT(escseq.arg[0], 1);
725 tinsertblank(escseq.arg[0]);
726 break;
727 case 'A': /* CUU -- Cursor <n> Up */
728 case 'e':
729 DEFAULT(escseq.arg[0], 1);
730 tmoveto(term.c.x, term.c.y-escseq.arg[0]);
731 break;
732 case 'B': /* CUD -- Cursor <n> Down */
733 DEFAULT(escseq.arg[0], 1);
734 tmoveto(term.c.x, term.c.y+escseq.arg[0]);
735 break;
736 case 'C': /* CUF -- Cursor <n> Forward */
737 case 'a':
738 DEFAULT(escseq.arg[0], 1);
739 tmoveto(term.c.x+escseq.arg[0], term.c.y);
740 break;
741 case 'D': /* CUB -- Cursor <n> Backward */
742 DEFAULT(escseq.arg[0], 1);
743 tmoveto(term.c.x-escseq.arg[0], term.c.y);
744 break;
745 case 'E': /* CNL -- Cursor <n> Down and first col */
746 DEFAULT(escseq.arg[0], 1);
747 tmoveto(0, term.c.y+escseq.arg[0]);
748 break;
749 case 'F': /* CPL -- Cursor <n> Up and first col */
750 DEFAULT(escseq.arg[0], 1);
751 tmoveto(0, term.c.y-escseq.arg[0]);
752 break;
753 case 'G': /* CHA -- Move to <col> */
754 case '`': /* XXX: HPA -- same? */
755 DEFAULT(escseq.arg[0], 1);
756 tmoveto(escseq.arg[0]-1, term.c.y);
757 break;
758 case 'H': /* CUP -- Move to <row> <col> */
759 case 'f': /* XXX: HVP -- same? */
760 DEFAULT(escseq.arg[0], 1);
761 DEFAULT(escseq.arg[1], 1);
762 tmoveto(escseq.arg[1]-1, escseq.arg[0]-1);
763 break;
764 /* XXX: (CSI n I) CHT -- Cursor Forward Tabulation <n> tab stops */
765 case 'J': /* ED -- Clear screen */
766 switch(escseq.arg[0]) {
767 case 0: /* below */
768 tclearregion(term.c.x, term.c.y, term.col-1, term.row-1);
769 break;
770 case 1: /* above */
771 tclearregion(0, 0, term.c.x, term.c.y);
772 break;
773 case 2: /* all */
774 tclearregion(0, 0, term.col-1, term.row-1);
775 break;
776 default:
777 goto unknown;
778 }
779 break;
780 case 'K': /* EL -- Clear line */
781 switch(escseq.arg[0]) {
782 case 0: /* right */
783 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
784 break;
785 case 1: /* left */
786 tclearregion(0, term.c.y, term.c.x, term.c.y);
787 break;
788 case 2: /* all */
789 tclearregion(0, term.c.y, term.col-1, term.c.y);
790 break;
791 }
792 break;
793 case 'S': /* SU -- Scroll <n> line up */
794 DEFAULT(escseq.arg[0], 1);
795 tscrollup(escseq.arg[0]);
796 break;
797 case 'T': /* SD -- Scroll <n> line down */
798 DEFAULT(escseq.arg[0], 1);
799 tscrolldown(escseq.arg[0]);
800 break;
801 case 'L': /* IL -- Insert <n> blank lines */
802 DEFAULT(escseq.arg[0], 1);
803 tinsertblankline(escseq.arg[0]);
804 break;
805 case 'l': /* RM -- Reset Mode */
806 if(escseq.priv) {
807 switch(escseq.arg[0]) {
808 case 1:
809 term.mode &= ~MODE_APPKEYPAD;
810 break;
811 case 7:
812 term.mode &= ~MODE_WRAP;
813 break;
814 case 12: /* att610 -- Stop blinking cursor (IGNORED) */
815 break;
816 case 25:
817 term.c.state |= CURSOR_HIDE;
818 break;
819 case 1049: /* = 1047 and 1048 */
820 case 1047:
821 if(IS_SET(MODE_ALTSCREEN)) {
822 tclearregion(0, 0, term.col-1, term.row-1);
823 tswapscreen();
824 }
825 if(escseq.arg[0] == 1047)
826 break;
827 case 1048:
828 tcursor(CURSOR_LOAD);
829 break;
830 default:
831 goto unknown;
832 }
833 } else {
834 switch(escseq.arg[0]) {
835 case 4:
836 term.mode &= ~MODE_INSERT;
837 break;
838 default:
839 goto unknown;
840 }
841 }
842 break;
843 case 'M': /* DL -- Delete <n> lines */
844 DEFAULT(escseq.arg[0], 1);
845 tdeleteline(escseq.arg[0]);
846 break;
847 case 'X': /* ECH -- Erase <n> char */
848 DEFAULT(escseq.arg[0], 1);
849 tclearregion(term.c.x, term.c.y, term.c.x + escseq.arg[0], term.c.y);
850 break;
851 case 'P': /* DCH -- Delete <n> char */
852 DEFAULT(escseq.arg[0], 1);
853 tdeletechar(escseq.arg[0]);
854 break;
855 /* XXX: (CSI n Z) CBT -- Cursor Backward Tabulation <n> tab stops */
856 case 'd': /* VPA -- Move to <row> */
857 DEFAULT(escseq.arg[0], 1);
858 tmoveto(term.c.x, escseq.arg[0]-1);
859 break;
860 case 'h': /* SM -- Set terminal mode */
861 if(escseq.priv) {
862 switch(escseq.arg[0]) {
863 case 1:
864 term.mode |= MODE_APPKEYPAD;
865 break;
866 case 7:
867 term.mode |= MODE_WRAP;
868 break;
869 case 12: /* att610 -- Start blinking cursor (IGNORED) */
870 break;
871 case 25:
872 term.c.state &= ~CURSOR_HIDE;
873 break;
874 case 1049: /* = 1047 and 1048 */
875 case 1047:
876 if(IS_SET(MODE_ALTSCREEN))
877 tclearregion(0, 0, term.col-1, term.row-1);
878 else
879 tswapscreen();
880 if(escseq.arg[0] == 1047)
881 break;
882 case 1048:
883 tcursor(CURSOR_SAVE);
884 break;
885 default: goto unknown;
886 }
887 } else {
888 switch(escseq.arg[0]) {
889 case 4:
890 term.mode |= MODE_INSERT;
891 break;
892 default: goto unknown;
893 }
894 };
895 break;
896 case 'm': /* SGR -- Terminal attribute (color) */
897 tsetattr(escseq.arg, escseq.narg);
898 break;
899 case 'r': /* DECSTBM -- Set Scrolling Region */
900 if(escseq.priv)
901 goto unknown;
902 else {
903 DEFAULT(escseq.arg[0], 1);
904 DEFAULT(escseq.arg[1], term.row);
905 tsetscroll(escseq.arg[0]-1, escseq.arg[1]-1);
906 tmoveto(0, 0);
907 }
908 break;
909 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
910 tcursor(CURSOR_SAVE);
911 break;
912 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
913 tcursor(CURSOR_LOAD);
914 break;
915 }
916 }
917
918 void
919 csidump(void) {
920 int i;
921 printf("ESC [ %s", escseq.priv ? "? " : "");
922 if(escseq.narg)
923 for(i = 0; i < escseq.narg; i++)
924 printf("%d ", escseq.arg[i]);
925 if(escseq.mode)
926 putchar(escseq.mode);
927 putchar('\n');
928 }
929
930 void
931 csireset(void) {
932 memset(&escseq, 0, sizeof(escseq));
933 }
934
935 void
936 tputtab(void) {
937 int space = TAB - term.c.x % TAB;
938 tmoveto(term.c.x + space, term.c.y);
939 }
940
941 void
942 tputc(char c) {
943 if(term.esc & ESC_START) {
944 if(term.esc & ESC_CSI) {
945 escseq.buf[escseq.len++] = c;
946 if(BETWEEN(c, 0x40, 0x7E) || escseq.len >= ESC_BUF_SIZ) {
947 term.esc = 0;
948 csiparse(), csihandle();
949 }
950 /* TODO: handle other OSC */
951 } else if(term.esc & ESC_OSC) {
952 if(c == ';') {
953 term.titlelen = 0;
954 term.esc = ESC_START | ESC_TITLE;
955 }
956 } else if(term.esc & ESC_TITLE) {
957 if(c == '\a' || term.titlelen+1 >= ESC_TITLE_SIZ) {
958 term.esc = 0;
959 term.title[term.titlelen] = '\0';
960 XStoreName(xw.dis, xw.win, term.title);
961 } else {
962 term.title[term.titlelen++] = c;
963 }
964 } else if(term.esc & ESC_ALTCHARSET) {
965 switch(c) {
966 case '0': /* Line drawing crap */
967 term.c.attr.mode |= ATTR_GFX;
968 break;
969 case 'B': /* Back to regular text */
970 term.c.attr.mode &= ~ATTR_GFX;
971 break;
972 default:
973 printf("esc unhandled charset: ESC ( %c\n", c);
974 }
975 term.esc = 0;
976 } else {
977 switch(c) {
978 case '[':
979 term.esc |= ESC_CSI;
980 break;
981 case ']':
982 term.esc |= ESC_OSC;
983 break;
984 case '(':
985 term.esc |= ESC_ALTCHARSET;
986 break;
987 case 'D': /* IND -- Linefeed */
988 if(term.c.y == term.bot)
989 tscrollup(1);
990 else
991 tmoveto(term.c.x, term.c.y+1);
992 term.esc = 0;
993 break;
994 case 'E': /* NEL -- Next line */
995 tnewline();
996 term.esc = 0;
997 break;
998 case 'M': /* RI -- Reverse index */
999 if(term.c.y == term.top)
1000 tscrolldown(1);
1001 else
1002 tmoveto(term.c.x, term.c.y-1);
1003 term.esc = 0;
1004 break;
1005 case 'c': /* RIS -- Reset to inital state */
1006 treset();
1007 term.esc = 0;
1008 break;
1009 case '=': /* DECPAM -- Application keypad */
1010 term.mode |= MODE_APPKEYPAD;
1011 term.esc = 0;
1012 break;
1013 case '>': /* DECPNM -- Normal keypad */
1014 term.mode &= ~MODE_APPKEYPAD;
1015 term.esc = 0;
1016 break;
1017 case '7': /* DECSC -- Save Cursor */
1018 tcursor(CURSOR_SAVE);
1019 term.esc = 0;
1020 break;
1021 case '8': /* DECRC -- Restore Cursor */
1022 tcursor(CURSOR_LOAD);
1023 term.esc = 0;
1024 break;
1025 default:
1026 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n", c, isprint(c)?c:'.');
1027 term.esc = 0;
1028 }
1029 }
1030 } else {
1031 switch(c) {
1032 case '\t':
1033 tputtab();
1034 break;
1035 case '\b':
1036 tmoveto(term.c.x-1, term.c.y);
1037 break;
1038 case '\r':
1039 tmoveto(0, term.c.y);
1040 break;
1041 case '\n':
1042 tnewline();
1043 break;
1044 case '\a':
1045 if(!xw.hasfocus)
1046 xseturgency(1);
1047 break;
1048 case '\033':
1049 csireset();
1050 term.esc = ESC_START;
1051 break;
1052 default:
1053 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
1054 tnewline();
1055 tsetchar(c);
1056 if(term.c.x+1 < term.col)
1057 tmoveto(term.c.x+1, term.c.y);
1058 else
1059 term.c.state |= CURSOR_WRAPNEXT;
1060 break;
1061 }
1062 }
1063 }
1064
1065 void
1066 tputs(char *s, int len) {
1067 for(; len > 0; len--)
1068 tputc(*s++);
1069 }
1070
1071 void
1072 tresize(int col, int row) {
1073 int i;
1074 int minrow = MIN(row, term.row);
1075 int mincol = MIN(col, term.col);
1076
1077 if(col < 1 || row < 1)
1078 return;
1079
1080 /* free uneeded rows */
1081 for(i = row; i < term.row; i++) {
1082 free(term.line[i]);
1083 free(term.alt[i]);
1084 }
1085
1086 /* resize to new height */
1087 term.line = realloc(term.line, row * sizeof(Line));
1088 term.alt = realloc(term.alt, row * sizeof(Line));
1089
1090 /* resize each row to new width, zero-pad if needed */
1091 for(i = 0; i < minrow; i++) {
1092 term.line[i] = realloc(term.line[i], col * sizeof(Glyph));
1093 term.alt[i] = realloc(term.alt[i], col * sizeof(Glyph));
1094 memset(term.line[i] + mincol, 0, (col - mincol) * sizeof(Glyph));
1095 memset(term.alt[i] + mincol, 0, (col - mincol) * sizeof(Glyph));
1096 }
1097
1098 /* allocate any new rows */
1099 for(/* i == minrow */; i < row; i++) {
1100 term.line[i] = calloc(col, sizeof(Glyph));
1101 term.alt [i] = calloc(col, sizeof(Glyph));
1102 }
1103
1104 /* update terminal size */
1105 term.col = col, term.row = row;
1106 /* make use of the LIMIT in tmoveto */
1107 tmoveto(term.c.x, term.c.y);
1108 /* reset scrolling region */
1109 tsetscroll(0, row-1);
1110 }
1111
1112 void
1113 xloadcols(void) {
1114 int i, r, g, b;
1115 XColor color;
1116 Colormap cmap = DefaultColormap(xw.dis, xw.scr);
1117 unsigned long white = WhitePixel(xw.dis, xw.scr);
1118
1119 for(i = 0; i < 16; i++) {
1120 if (!XAllocNamedColor(xw.dis, cmap, colorname[i], &color, &color)) {
1121 dc.col[i] = white;
1122 fprintf(stderr, "Could not allocate color '%s'\n", colorname[i]);
1123 } else
1124 dc.col[i] = color.pixel;
1125 }
1126
1127 /* same colors as xterm */
1128 for(r = 0; r < 6; r++)
1129 for(g = 0; g < 6; g++)
1130 for(b = 0; b < 6; b++) {
1131 color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
1132 color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
1133 color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
1134 if (!XAllocColor(xw.dis, cmap, &color)) {
1135 dc.col[i] = white;
1136 fprintf(stderr, "Could not allocate color %d\n", i);
1137 } else
1138 dc.col[i] = color.pixel;
1139 i++;
1140 }
1141
1142 for(r = 0; r < 24; r++, i++) {
1143 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
1144 if (!XAllocColor(xw.dis, cmap, &color)) {
1145 dc.col[i] = white;
1146 fprintf(stderr, "Could not allocate color %d\n", i);
1147 } else
1148 dc.col[i] = color.pixel;
1149 }
1150 }
1151
1152 void
1153 xclear(int x1, int y1, int x2, int y2) {
1154 XSetForeground(xw.dis, dc.gc, dc.col[DefaultBG]);
1155 XFillRectangle(xw.dis, xw.buf, dc.gc,
1156 x1 * xw.cw, y1 * xw.ch,
1157 (x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch);
1158 }
1159
1160 void
1161 xhints(void)
1162 {
1163 XClassHint class = {TNAME, TNAME};
1164 XWMHints wm = {.flags = InputHint, .input = 1};
1165 XSizeHints size = {
1166 .flags = PSize | PResizeInc | PBaseSize,
1167 .height = xw.h,
1168 .width = xw.w,
1169 .height_inc = xw.ch,
1170 .width_inc = xw.cw,
1171 .base_height = 2*BORDER,
1172 .base_width = 2*BORDER,
1173 };
1174 XSetWMProperties(xw.dis, xw.win, NULL, NULL, NULL, 0, &size, &wm, &class);
1175 }
1176
1177 void
1178 xinit(void) {
1179 if(!(xw.dis = XOpenDisplay(NULL)))
1180 die("Can't open display\n");
1181 xw.scr = XDefaultScreen(xw.dis);
1182
1183 /* font */
1184 if(!(dc.font = XLoadQueryFont(xw.dis, FONT)) || !(dc.bfont = XLoadQueryFont(xw.dis, BOLDFONT)))
1185 die("Can't load font %s\n", dc.font ? BOLDFONT : FONT);
1186
1187 /* XXX: Assuming same size for bold font */
1188 xw.cw = dc.font->max_bounds.rbearing - dc.font->min_bounds.lbearing;
1189 xw.ch = dc.font->ascent + dc.font->descent;
1190
1191 /* colors */
1192 xloadcols();
1193
1194 /* windows */
1195 xw.bufh = term.row * xw.ch;
1196 xw.bufw = term.col * xw.cw;
1197 xw.h = xw.bufh + 2*BORDER;
1198 xw.w = xw.bufw + 2*BORDER;
1199 xw.win = XCreateSimpleWindow(xw.dis, XRootWindow(xw.dis, xw.scr), 0, 0,
1200 xw.w, xw.h, 0,
1201 dc.col[DefaultBG],
1202 dc.col[DefaultBG]);
1203 xw.buf = XCreatePixmap(xw.dis, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dis, xw.scr));
1204 /* gc */
1205 dc.gc = XCreateGC(xw.dis, xw.win, 0, NULL);
1206
1207 /* event mask */
1208 XSelectInput(xw.dis, xw.win, ExposureMask | KeyPressMask
1209 | StructureNotifyMask | FocusChangeMask | PointerMotionMask
1210 | ButtonPressMask | ButtonReleaseMask);
1211
1212 XMapWindow(xw.dis, xw.win);
1213 xhints();
1214 XStoreName(xw.dis, xw.win, "st");
1215 XSync(xw.dis, 0);
1216 }
1217
1218 void
1219 xdraws(char *s, Glyph base, int x, int y, int len) {
1220 unsigned long xfg, xbg;
1221 int winx = x*xw.cw, winy = y*xw.ch + dc.font->ascent, width = len*xw.cw;
1222 int i;
1223
1224 if(base.mode & ATTR_REVERSE)
1225 xfg = dc.col[base.bg], xbg = dc.col[base.fg];
1226 else
1227 xfg = dc.col[base.fg], xbg = dc.col[base.bg];
1228
1229 XSetBackground(xw.dis, dc.gc, xbg);
1230 XSetForeground(xw.dis, dc.gc, xfg);
1231
1232 if(base.mode & ATTR_GFX)
1233 for(i = 0; i < len; i++)
1234 s[i] = gfx[(int)s[i]];
1235
1236 XSetFont(xw.dis, dc.gc, base.mode & ATTR_BOLD ? dc.bfont->fid : dc.font->fid);
1237 XDrawImageString(xw.dis, xw.buf, dc.gc, winx, winy, s, len);
1238
1239 if(base.mode & ATTR_UNDERLINE)
1240 XDrawLine(xw.dis, xw.buf, dc.gc, winx, winy+1, winx+width-1, winy+1);
1241 }
1242
1243 void
1244 xdrawcursor(void) {
1245 static int oldx = 0;
1246 static int oldy = 0;
1247 Glyph g = {' ', ATTR_NULL, DefaultBG, DefaultCS, 0};
1248
1249 LIMIT(oldx, 0, term.col-1);
1250 LIMIT(oldy, 0, term.row-1);
1251
1252 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
1253 g.c = term.line[term.c.y][term.c.x].c;
1254
1255 /* remove the old cursor */
1256 if(term.line[oldy][oldx].state & GLYPH_SET)
1257 xdraws(&term.line[oldy][oldx].c, term.line[oldy][oldx], oldx, oldy, 1);
1258 else
1259 xclear(oldx, oldy, oldx, oldy);
1260
1261 /* draw the new one */
1262 if(!(term.c.state & CURSOR_HIDE) && xw.hasfocus) {
1263 xdraws(&g.c, g, term.c.x, term.c.y, 1);
1264 oldx = term.c.x, oldy = term.c.y;
1265 }
1266 }
1267
1268 #ifdef DEBUG
1269 /* basic drawing routines */
1270 void
1271 xdrawc(int x, int y, Glyph g) {
1272 XRectangle r = { x * xw.cw, y * xw.ch, xw.cw, xw.ch };
1273 XSetBackground(xw.dis, dc.gc, dc.col[g.bg]);
1274 XSetForeground(xw.dis, dc.gc, dc.col[g.fg]);
1275 XSetFont(xw.dis, dc.gc, g.mode & ATTR_BOLD ? dc.bfont->fid : dc.font->fid);
1276 XDrawImageString(xw.dis, xw.buf, dc.gc, r.x, r.y+dc.font->ascent, &g.c, 1);
1277 }
1278
1279 void
1280 draw(int dummy) {
1281 int x, y;
1282
1283 xclear(0, 0, term.col-1, term.row-1);
1284 for(y = 0; y < term.row; y++)
1285 for(x = 0; x < term.col; x++)
1286 if(term.line[y][x].state & GLYPH_SET)
1287 xdrawc(x, y, term.line[y][x]);
1288
1289 xdrawcursor();
1290 XCopyArea(xw.dis, xw.buf, xw.win, dc.gc, 0, 0, xw.bufw, xw.bufh, BORDER, BORDER);
1291 XFlush(xw.dis);
1292 }
1293
1294 #else
1295 /* optimized drawing routine */
1296 void
1297 draw(int redraw_all) {
1298 int i, x, y, ox;
1299 Glyph base, new;
1300 char buf[DRAW_BUF_SIZ];
1301
1302 XSetForeground(xw.dis, dc.gc, dc.col[DefaultBG]);
1303 XFillRectangle(xw.dis, xw.buf, dc.gc, 0, 0, xw.bufw, xw.bufh);
1304 for(y = 0; y < term.row; y++) {
1305 base = term.line[y][0];
1306 i = ox = 0;
1307 for(x = 0; x < term.col; x++) {
1308 new = term.line[y][x];
1309 if(sel.bx!=-1 && new.c && selected(x, y))
1310 new.mode ^= ATTR_REVERSE;
1311 if(i > 0 && (!(new.state & GLYPH_SET) || ATTRCMP(base, new) ||
1312 i >= DRAW_BUF_SIZ)) {
1313 xdraws(buf, base, ox, y, i);
1314 i = 0;
1315 }
1316 if(new.state & GLYPH_SET) {
1317 if(i == 0) {
1318 ox = x;
1319 base = new;
1320 }
1321 buf[i++] = new.c;
1322 }
1323 }
1324 if(i > 0)
1325 xdraws(buf, base, ox, y, i);
1326 }
1327 xdrawcursor();
1328 XCopyArea(xw.dis, xw.buf, xw.win, dc.gc, 0, 0, xw.bufw, xw.bufh, BORDER, BORDER);
1329 XFlush(xw.dis);
1330 }
1331
1332 #endif
1333
1334 void
1335 expose(XEvent *ev) {
1336 draw(SCREEN_REDRAW);
1337 }
1338
1339 void
1340 xseturgency(int add) {
1341 XWMHints *h = XGetWMHints(xw.dis, xw.win);
1342 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
1343 XSetWMHints(xw.dis, xw.win, h);
1344 XFree(h);
1345 }
1346
1347 void
1348 focus(XEvent *ev) {
1349 if((xw.hasfocus = ev->type == FocusIn))
1350 xseturgency(0);
1351 draw(SCREEN_UPDATE);
1352 }
1353
1354 char*
1355 kmap(KeySym k) {
1356 int i;
1357 for(i = 0; i < LEN(key); i++)
1358 if(key[i].k == k)
1359 return (char*)key[i].s;
1360 return NULL;
1361 }
1362
1363 void
1364 kpress(XEvent *ev) {
1365 XKeyEvent *e = &ev->xkey;
1366 KeySym ksym;
1367 char buf[32];
1368 char *customkey;
1369 int len;
1370 int meta;
1371 int shift;
1372
1373 meta = e->state & Mod1Mask;
1374 shift = e->state & ShiftMask;
1375 len = XLookupString(e, buf, sizeof(buf), &ksym, NULL);
1376
1377 if((customkey = kmap(ksym)))
1378 ttywrite(customkey, strlen(customkey));
1379 else if(len > 0) {
1380 buf[sizeof(buf)-1] = '\0';
1381 if(meta && len == 1)
1382 ttywrite("\033", 1);
1383 ttywrite(buf, len);
1384 } else
1385 switch(ksym) {
1386 case XK_Up:
1387 case XK_Down:
1388 case XK_Left:
1389 case XK_Right:
1390 sprintf(buf, "\033%c%c", IS_SET(MODE_APPKEYPAD) ? 'O' : '[', "DACB"[ksym - XK_Left]);
1391 ttywrite(buf, 3);
1392 break;
1393 case XK_Insert:
1394 if(shift)
1395 selpaste(), draw(1);
1396 break;
1397 default:
1398 fprintf(stderr, "errkey: %d\n", (int)ksym);
1399 break;
1400 }
1401 }
1402
1403 void
1404 resize(XEvent *e) {
1405 int col, row;
1406
1407 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
1408 return;
1409
1410 xw.w = e->xconfigure.width;
1411 xw.h = e->xconfigure.height;
1412 xw.bufw = xw.w - 2*BORDER;
1413 xw.bufh = xw.h - 2*BORDER;
1414 col = xw.bufw / xw.cw;
1415 row = xw.bufh / xw.ch;
1416 tresize(col, row);
1417 ttyresize(col, row);
1418 xw.bufh = MAX(1, xw.bufh);
1419 xw.bufw = MAX(1, xw.bufw);
1420 XFreePixmap(xw.dis, xw.buf);
1421 xw.buf = XCreatePixmap(xw.dis, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dis, xw.scr));
1422 draw(SCREEN_REDRAW);
1423 }
1424
1425 void
1426 run(void) {
1427 XEvent ev;
1428 fd_set rfd;
1429 int xfd = XConnectionNumber(xw.dis);
1430
1431 for(;;) {
1432 FD_ZERO(&rfd);
1433 FD_SET(cmdfd, &rfd);
1434 FD_SET(xfd, &rfd);
1435 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, NULL) < 0) {
1436 if(errno == EINTR)
1437 continue;
1438 die("select failed: %s\n", SERRNO);
1439 }
1440 if(FD_ISSET(cmdfd, &rfd)) {
1441 ttyread();
1442 draw(SCREEN_UPDATE);
1443 }
1444 while(XPending(xw.dis)) {
1445 XNextEvent(xw.dis, &ev);
1446 if(handler[ev.type])
1447 (handler[ev.type])(&ev);
1448 }
1449 }
1450 }
1451
1452 int
1453 main(int argc, char *argv[]) {
1454 if(argc == 2 && !strncmp("-v", argv[1], 3))
1455 die("st-" VERSION ", (c) 2010 st engineers\n");
1456 else if(argc != 1)
1457 die("usage: st [-v]\n");
1458 setlocale(LC_CTYPE, "");
1459 tnew(80, 24);
1460 ttynew();
1461 xinit();
1462 selinit();
1463 run();
1464 return 0;
1465 }