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9e66d09bf3e94ffd4dc783a6dd7f4ad5187301db
[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 #define USAGE \
32 "st-" VERSION ", (c) 2010 st engineers\n" \
33 "usage: st [-t title] [-e cmd] [-v]\n"
34
35 /* Arbitrary sizes */
36 #define ESC_TITLE_SIZ 256
37 #define ESC_BUF_SIZ 256
38 #define ESC_ARG_SIZ 16
39 #define DRAW_BUF_SIZ 1024
40
41 #define SERRNO strerror(errno)
42 #define MIN(a, b) ((a) < (b) ? (a) : (b))
43 #define MAX(a, b) ((a) < (b) ? (b) : (a))
44 #define LEN(a) (sizeof(a) / sizeof(a[0]))
45 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
46 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
47 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
48 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
49 #define IS_SET(flag) (term.mode & (flag))
50
51 /* Attribute, Cursor, Character state, Terminal mode, Screen draw mode */
52 enum { ATTR_NULL=0 , ATTR_REVERSE=1 , ATTR_UNDERLINE=2, ATTR_BOLD=4, ATTR_GFX=8 };
53 enum { CURSOR_UP, CURSOR_DOWN, CURSOR_LEFT, CURSOR_RIGHT,
54 CURSOR_SAVE, CURSOR_LOAD };
55 enum { CURSOR_DEFAULT = 0, CURSOR_HIDE = 1, CURSOR_WRAPNEXT = 2 };
56 enum { GLYPH_SET=1, GLYPH_DIRTY=2 };
57 enum { MODE_WRAP=1, MODE_INSERT=2, MODE_APPKEYPAD=4, MODE_ALTSCREEN=8 };
58 enum { ESC_START=1, ESC_CSI=2, ESC_OSC=4, ESC_TITLE=8, ESC_ALTCHARSET=16 };
59 enum { SCREEN_UPDATE, SCREEN_REDRAW };
60
61 typedef struct {
62 char c; /* character code */
63 char mode; /* attribute flags */
64 int fg; /* foreground */
65 int bg; /* background */
66 char state; /* state flags */
67 } Glyph;
68
69 typedef Glyph* Line;
70
71 typedef struct {
72 Glyph attr; /* current char attributes */
73 int x;
74 int y;
75 char state;
76 } TCursor;
77
78 /* CSI Escape sequence structs */
79 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
80 typedef struct {
81 char buf[ESC_BUF_SIZ]; /* raw string */
82 int len; /* raw string length */
83 char priv;
84 int arg[ESC_ARG_SIZ];
85 int narg; /* nb of args */
86 char mode;
87 } CSIEscape;
88
89 /* Internal representation of the screen */
90 typedef struct {
91 int row; /* nb row */
92 int col; /* nb col */
93 Line* line; /* screen */
94 Line* alt; /* alternate screen */
95 TCursor c; /* cursor */
96 int top; /* top scroll limit */
97 int bot; /* bottom scroll limit */
98 int mode; /* terminal mode flags */
99 int esc; /* escape state flags */
100 char title[ESC_TITLE_SIZ];
101 int titlelen;
102 } Term;
103
104 /* Purely graphic info */
105 typedef struct {
106 Display* dis;
107 Window win;
108 Pixmap buf;
109 int scr;
110 int w; /* window width */
111 int h; /* window height */
112 int bufw; /* pixmap width */
113 int bufh; /* pixmap height */
114 int ch; /* char height */
115 int cw; /* char width */
116 int hasfocus;
117 } XWindow;
118
119 typedef struct {
120 KeySym k;
121 char s[ESC_BUF_SIZ];
122 } Key;
123
124 /* Drawing Context */
125 typedef struct {
126 unsigned long col[256];
127 XFontStruct* font;
128 XFontStruct* bfont;
129 GC gc;
130 } DC;
131
132 /* TODO: use better name for vars... */
133 typedef struct {
134 int mode;
135 int bx, by;
136 int ex, ey;
137 struct {int x, y;} b, e;
138 char *clip;
139 } Selection;
140
141 #include "config.h"
142
143 static void die(const char *errstr, ...);
144 static void draw(int);
145 static void execsh(void);
146 static void sigchld(int);
147 static void run(void);
148
149 static void csidump(void);
150 static void csihandle(void);
151 static void csiparse(void);
152 static void csireset(void);
153
154 static void tclearregion(int, int, int, int);
155 static void tcursor(int);
156 static void tdeletechar(int);
157 static void tdeleteline(int);
158 static void tinsertblank(int);
159 static void tinsertblankline(int);
160 static void tmoveto(int, int);
161 static void tnew(int, int);
162 static void tnewline(void);
163 static void tputtab(void);
164 static void tputc(char);
165 static void tputs(char*, int);
166 static void treset(void);
167 static void tresize(int, int);
168 static void tscrollup(int, int);
169 static void tscrolldown(int, int);
170 static void tsetattr(int*, int);
171 static void tsetchar(char);
172 static void tsetscroll(int, int);
173 static void tswapscreen(void);
174
175 static void ttynew(void);
176 static void ttyread(void);
177 static void ttyresize(int, int);
178 static void ttywrite(const char *, size_t);
179
180 static void xdraws(char *, Glyph, int, int, int);
181 static void xhints(void);
182 static void xclear(int, int, int, int);
183 static void xdrawcursor(void);
184 static void xinit(void);
185 static void xloadcols(void);
186 static void xseturgency(int);
187
188 static void expose(XEvent *);
189 static char* kmap(KeySym);
190 static void kpress(XEvent *);
191 static void resize(XEvent *);
192 static void focus(XEvent *);
193 static void brelease(XEvent *);
194 static void bpress(XEvent *);
195 static void bmotion(XEvent *);
196
197
198 static void (*handler[LASTEvent])(XEvent *) = {
199 [KeyPress] = kpress,
200 [Expose] = expose,
201 [ConfigureNotify] = resize,
202 [FocusIn] = focus,
203 [FocusOut] = focus,
204 [MotionNotify] = bmotion,
205 [ButtonPress] = bpress,
206 [ButtonRelease] = brelease,
207 };
208
209 /* Globals */
210 static DC dc;
211 static XWindow xw;
212 static Term term;
213 static CSIEscape escseq;
214 static int cmdfd;
215 static pid_t pid;
216 static Selection sel;
217 static char *opt_cmd = NULL;
218 static char *opt_title = NULL;
219
220 void
221 selinit(void) {
222 sel.mode = 0;
223 sel.bx = -1;
224 sel.clip = NULL;
225 }
226
227 static inline int selected(int x, int y) {
228 if(sel.ey == y && sel.by == y) {
229 int bx = MIN(sel.bx, sel.ex);
230 int ex = MAX(sel.bx, sel.ex);
231 return BETWEEN(x, bx, ex);
232 }
233 return ((sel.b.y < y&&y < sel.e.y) || (y==sel.e.y && x<=sel.e.x))
234 || (y==sel.b.y && x>=sel.b.x && (x<=sel.e.x || sel.b.y!=sel.e.y));
235 }
236
237 static void getbuttoninfo(XEvent *e, int *b, int *x, int *y) {
238 if(b) *b = e->xbutton.state,
239 *b=*b==4096?5:*b==2048?4:*b==1024?3:*b==512?2:*b==256?1:-1;
240 *x = e->xbutton.x/xw.cw;
241 *y = e->xbutton.y/xw.ch;
242 sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
243 sel.b.y = MIN(sel.by, sel.ey);
244 sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
245 sel.e.y = MAX(sel.by, sel.ey);
246 }
247
248 static void bpress(XEvent *e) {
249 sel.mode = 1;
250 sel.ex = sel.bx = e->xbutton.x/xw.cw;
251 sel.ey = sel.by = e->xbutton.y/xw.ch;
252 }
253
254 static char *getseltext() {
255 char *str, *ptr;
256 int ls, x, y, sz;
257 if(sel.bx == -1)
258 return NULL;
259 sz = (term.col+1) * (sel.e.y-sel.b.y+1);
260 ptr = str = malloc(sz);
261 for(y = 0; y < term.row; y++) {
262 for(x = 0; x < term.col; x++)
263 if(term.line[y][x].state & GLYPH_SET && (ls = selected(x, y)))
264 *ptr = term.line[y][x].c, ptr++;
265 if(ls)
266 *ptr = '\n', ptr++;
267 }
268 *ptr = 0;
269 return str;
270 }
271
272 /* TODO: use X11 clipboard */
273 static void selcopy(char *str) {
274 free(sel.clip);
275 sel.clip = str;
276 }
277
278 static void selpaste() {
279 if(sel.clip)
280 ttywrite(sel.clip, strlen(sel.clip));
281 }
282
283 /* TODO: doubleclick to select word */
284 static void brelease(XEvent *e) {
285 int b;
286 sel.mode = 0;
287 getbuttoninfo(e, &b, &sel.ex, &sel.ey);
288 if(sel.bx==sel.ex && sel.by==sel.ey) {
289 sel.bx = -1;
290 if(b==2)
291 selpaste();
292 } else {
293 if(b==1)
294 selcopy(getseltext());
295 }
296 draw(1);
297 }
298
299 static void bmotion(XEvent *e) {
300 if (sel.mode) {
301 getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
302 draw(1);
303 }
304 }
305
306 #ifdef DEBUG
307 void
308 tdump(void) {
309 int row, col;
310 Glyph c;
311
312 for(row = 0; row < term.row; row++) {
313 for(col = 0; col < term.col; col++) {
314 if(col == term.c.x && row == term.c.y)
315 putchar('#');
316 else {
317 c = term.line[row][col];
318 putchar(c.state & GLYPH_SET ? c.c : '.');
319 }
320 }
321 putchar('\n');
322 }
323 }
324 #endif
325
326 void
327 die(const char *errstr, ...) {
328 va_list ap;
329
330 va_start(ap, errstr);
331 vfprintf(stderr, errstr, ap);
332 va_end(ap);
333 exit(EXIT_FAILURE);
334 }
335
336 void
337 execsh(void) {
338 char *args[] = {getenv("SHELL"), "-i", NULL};
339 if(opt_cmd)
340 args[0] = opt_cmd, args[1] = NULL;
341 else
342 DEFAULT(args[0], SHELL);
343 putenv("TERM="TNAME);
344 execvp(args[0], args);
345 }
346
347 void
348 sigchld(int a) {
349 int stat = 0;
350 if(waitpid(pid, &stat, 0) < 0)
351 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
352 if(WIFEXITED(stat))
353 exit(WEXITSTATUS(stat));
354 else
355 exit(EXIT_FAILURE);
356 }
357
358 void
359 ttynew(void) {
360 int m, s;
361
362 /* seems to work fine on linux, openbsd and freebsd */
363 struct winsize w = {term.row, term.col, 0, 0};
364 if(openpty(&m, &s, NULL, NULL, &w) < 0)
365 die("openpty failed: %s\n", SERRNO);
366
367 switch(pid = fork()) {
368 case -1:
369 die("fork failed\n");
370 break;
371 case 0:
372 setsid(); /* create a new process group */
373 dup2(s, STDIN_FILENO);
374 dup2(s, STDOUT_FILENO);
375 dup2(s, STDERR_FILENO);
376 if(ioctl(s, TIOCSCTTY, NULL) < 0)
377 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
378 close(s);
379 close(m);
380 execsh();
381 break;
382 default:
383 close(s);
384 cmdfd = m;
385 signal(SIGCHLD, sigchld);
386 }
387 }
388
389 void
390 dump(char c) {
391 static int col;
392 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
393 if(++col % 10 == 0)
394 fprintf(stderr, "\n");
395 }
396
397 void
398 ttyread(void) {
399 char buf[BUFSIZ];
400 int ret;
401
402 if((ret = read(cmdfd, buf, LEN(buf))) < 0)
403 die("Couldn't read from shell: %s\n", SERRNO);
404 else
405 tputs(buf, ret);
406 }
407
408 void
409 ttywrite(const char *s, size_t n) {
410 if(write(cmdfd, s, n) == -1)
411 die("write error on tty: %s\n", SERRNO);
412 }
413
414 void
415 ttyresize(int x, int y) {
416 struct winsize w;
417
418 w.ws_row = term.row;
419 w.ws_col = term.col;
420 w.ws_xpixel = w.ws_ypixel = 0;
421 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
422 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
423 }
424
425 void
426 tcursor(int mode) {
427 static TCursor c;
428
429 if(mode == CURSOR_SAVE)
430 c = term.c;
431 else if(mode == CURSOR_LOAD)
432 term.c = c, tmoveto(c.x, c.y);
433 }
434
435 void
436 treset(void) {
437 term.c = (TCursor){{
438 .mode = ATTR_NULL,
439 .fg = DefaultFG,
440 .bg = DefaultBG
441 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
442
443 term.top = 0, term.bot = term.row - 1;
444 term.mode = MODE_WRAP;
445 tclearregion(0, 0, term.col-1, term.row-1);
446 }
447
448 void
449 tnew(int col, int row) {
450 /* set screen size */
451 term.row = row, term.col = col;
452 term.line = malloc(term.row * sizeof(Line));
453 term.alt = malloc(term.row * sizeof(Line));
454 for(row = 0 ; row < term.row; row++) {
455 term.line[row] = malloc(term.col * sizeof(Glyph));
456 term.alt [row] = malloc(term.col * sizeof(Glyph));
457 }
458 /* setup screen */
459 treset();
460 }
461
462 void
463 tswapscreen(void) {
464 Line* tmp = term.line;
465 term.line = term.alt;
466 term.alt = tmp;
467 term.mode ^= MODE_ALTSCREEN;
468 }
469
470 void
471 tscrolldown(int orig, int n) {
472 int i;
473 Line temp;
474
475 LIMIT(n, 0, term.bot-orig+1);
476
477 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
478
479 for(i = term.bot; i >= orig+n; i--) {
480 temp = term.line[i];
481 term.line[i] = term.line[i-n];
482 term.line[i-n] = temp;
483 }
484 }
485
486 void
487 tscrollup(int orig, int n) {
488 int i;
489 Line temp;
490 LIMIT(n, 0, term.bot-orig+1);
491
492 tclearregion(0, orig, term.col-1, orig+n-1);
493
494 for(i = orig; i <= term.bot-n; i++) {
495 temp = term.line[i];
496 term.line[i] = term.line[i+n];
497 term.line[i+n] = temp;
498 }
499 }
500
501 void
502 tnewline(void) {
503 int y = term.c.y;
504 if(term.c.y == term.bot)
505 tscrollup(term.top, 1);
506 else
507 y++;
508 tmoveto(0, y);
509 }
510
511 void
512 csiparse(void) {
513 /* int noarg = 1; */
514 char *p = escseq.buf;
515
516 escseq.narg = 0;
517 if(*p == '?')
518 escseq.priv = 1, p++;
519
520 while(p < escseq.buf+escseq.len) {
521 while(isdigit(*p)) {
522 escseq.arg[escseq.narg] *= 10;
523 escseq.arg[escseq.narg] += *p++ - '0'/*, noarg = 0 */;
524 }
525 if(*p == ';' && escseq.narg+1 < ESC_ARG_SIZ)
526 escseq.narg++, p++;
527 else {
528 escseq.mode = *p;
529 escseq.narg++;
530 return;
531 }
532 }
533 }
534
535 void
536 tmoveto(int x, int y) {
537 LIMIT(x, 0, term.col-1);
538 LIMIT(y, 0, term.row-1);
539 term.c.state &= ~CURSOR_WRAPNEXT;
540 term.c.x = x;
541 term.c.y = y;
542 }
543
544 void
545 tsetchar(char c) {
546 term.line[term.c.y][term.c.x] = term.c.attr;
547 term.line[term.c.y][term.c.x].c = c;
548 term.line[term.c.y][term.c.x].state |= GLYPH_SET;
549 }
550
551 void
552 tclearregion(int x1, int y1, int x2, int y2) {
553 int y, temp;
554
555 if(x1 > x2)
556 temp = x1, x1 = x2, x2 = temp;
557 if(y1 > y2)
558 temp = y1, y1 = y2, y2 = temp;
559
560 LIMIT(x1, 0, term.col-1);
561 LIMIT(x2, 0, term.col-1);
562 LIMIT(y1, 0, term.row-1);
563 LIMIT(y2, 0, term.row-1);
564
565 for(y = y1; y <= y2; y++)
566 memset(&term.line[y][x1], 0, sizeof(Glyph)*(x2-x1+1));
567 }
568
569 void
570 tdeletechar(int n) {
571 int src = term.c.x + n;
572 int dst = term.c.x;
573 int size = term.col - src;
574
575 if(src >= term.col) {
576 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
577 return;
578 }
579 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
580 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
581 }
582
583 void
584 tinsertblank(int n) {
585 int src = term.c.x;
586 int dst = src + n;
587 int size = term.col - dst;
588
589 if(dst >= term.col) {
590 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
591 return;
592 }
593 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
594 tclearregion(src, term.c.y, dst - 1, term.c.y);
595 }
596
597 void
598 tinsertblankline(int n) {
599 if(term.c.y < term.top || term.c.y > term.bot)
600 return;
601
602 tscrolldown(term.c.y, n);
603 }
604
605 void
606 tdeleteline(int n) {
607 if(term.c.y < term.top || term.c.y > term.bot)
608 return;
609
610 tscrollup(term.c.y, n);
611 }
612
613 void
614 tsetattr(int *attr, int l) {
615 int i;
616
617 for(i = 0; i < l; i++) {
618 switch(attr[i]) {
619 case 0:
620 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD);
621 term.c.attr.fg = DefaultFG;
622 term.c.attr.bg = DefaultBG;
623 break;
624 case 1:
625 term.c.attr.mode |= ATTR_BOLD;
626 break;
627 case 4:
628 term.c.attr.mode |= ATTR_UNDERLINE;
629 break;
630 case 7:
631 term.c.attr.mode |= ATTR_REVERSE;
632 break;
633 case 22:
634 term.c.attr.mode &= ~ATTR_BOLD;
635 break;
636 case 24:
637 term.c.attr.mode &= ~ATTR_UNDERLINE;
638 break;
639 case 27:
640 term.c.attr.mode &= ~ATTR_REVERSE;
641 break;
642 case 38:
643 if (i + 2 < l && attr[i + 1] == 5) {
644 i += 2;
645 if (BETWEEN(attr[i], 0, 255))
646 term.c.attr.fg = attr[i];
647 else
648 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[i]);
649 }
650 else
651 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
652 break;
653 case 39:
654 term.c.attr.fg = DefaultFG;
655 break;
656 case 48:
657 if (i + 2 < l && attr[i + 1] == 5) {
658 i += 2;
659 if (BETWEEN(attr[i], 0, 255))
660 term.c.attr.bg = attr[i];
661 else
662 fprintf(stderr, "erresc: bad bgcolor %d\n", attr[i]);
663 }
664 else
665 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
666 break;
667 case 49:
668 term.c.attr.bg = DefaultBG;
669 break;
670 default:
671 if(BETWEEN(attr[i], 30, 37))
672 term.c.attr.fg = attr[i] - 30;
673 else if(BETWEEN(attr[i], 40, 47))
674 term.c.attr.bg = attr[i] - 40;
675 else if(BETWEEN(attr[i], 90, 97))
676 term.c.attr.fg = attr[i] - 90 + 8;
677 else if(BETWEEN(attr[i], 100, 107))
678 term.c.attr.fg = attr[i] - 100 + 8;
679 else
680 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]), csidump();
681
682 break;
683 }
684 }
685 }
686
687 void
688 tsetscroll(int t, int b) {
689 int temp;
690
691 LIMIT(t, 0, term.row-1);
692 LIMIT(b, 0, term.row-1);
693 if(t > b) {
694 temp = t;
695 t = b;
696 b = temp;
697 }
698 term.top = t;
699 term.bot = b;
700 }
701
702 void
703 csihandle(void) {
704 switch(escseq.mode) {
705 default:
706 unknown:
707 printf("erresc: unknown csi ");
708 csidump();
709 /* die(""); */
710 break;
711 case '@': /* ICH -- Insert <n> blank char */
712 DEFAULT(escseq.arg[0], 1);
713 tinsertblank(escseq.arg[0]);
714 break;
715 case 'A': /* CUU -- Cursor <n> Up */
716 case 'e':
717 DEFAULT(escseq.arg[0], 1);
718 tmoveto(term.c.x, term.c.y-escseq.arg[0]);
719 break;
720 case 'B': /* CUD -- Cursor <n> Down */
721 DEFAULT(escseq.arg[0], 1);
722 tmoveto(term.c.x, term.c.y+escseq.arg[0]);
723 break;
724 case 'C': /* CUF -- Cursor <n> Forward */
725 case 'a':
726 DEFAULT(escseq.arg[0], 1);
727 tmoveto(term.c.x+escseq.arg[0], term.c.y);
728 break;
729 case 'D': /* CUB -- Cursor <n> Backward */
730 DEFAULT(escseq.arg[0], 1);
731 tmoveto(term.c.x-escseq.arg[0], term.c.y);
732 break;
733 case 'E': /* CNL -- Cursor <n> Down and first col */
734 DEFAULT(escseq.arg[0], 1);
735 tmoveto(0, term.c.y+escseq.arg[0]);
736 break;
737 case 'F': /* CPL -- Cursor <n> Up and first col */
738 DEFAULT(escseq.arg[0], 1);
739 tmoveto(0, term.c.y-escseq.arg[0]);
740 break;
741 case 'G': /* CHA -- Move to <col> */
742 case '`': /* XXX: HPA -- same? */
743 DEFAULT(escseq.arg[0], 1);
744 tmoveto(escseq.arg[0]-1, term.c.y);
745 break;
746 case 'H': /* CUP -- Move to <row> <col> */
747 case 'f': /* XXX: HVP -- same? */
748 DEFAULT(escseq.arg[0], 1);
749 DEFAULT(escseq.arg[1], 1);
750 tmoveto(escseq.arg[1]-1, escseq.arg[0]-1);
751 break;
752 /* XXX: (CSI n I) CHT -- Cursor Forward Tabulation <n> tab stops */
753 case 'J': /* ED -- Clear screen */
754 switch(escseq.arg[0]) {
755 case 0: /* below */
756 tclearregion(term.c.x, term.c.y, term.col-1, term.row-1);
757 break;
758 case 1: /* above */
759 tclearregion(0, 0, term.c.x, term.c.y);
760 break;
761 case 2: /* all */
762 tclearregion(0, 0, term.col-1, term.row-1);
763 break;
764 default:
765 goto unknown;
766 }
767 break;
768 case 'K': /* EL -- Clear line */
769 switch(escseq.arg[0]) {
770 case 0: /* right */
771 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
772 break;
773 case 1: /* left */
774 tclearregion(0, term.c.y, term.c.x, term.c.y);
775 break;
776 case 2: /* all */
777 tclearregion(0, term.c.y, term.col-1, term.c.y);
778 break;
779 }
780 break;
781 case 'S': /* SU -- Scroll <n> line up */
782 DEFAULT(escseq.arg[0], 1);
783 tscrollup(term.top, escseq.arg[0]);
784 break;
785 case 'T': /* SD -- Scroll <n> line down */
786 DEFAULT(escseq.arg[0], 1);
787 tscrolldown(term.top, escseq.arg[0]);
788 break;
789 case 'L': /* IL -- Insert <n> blank lines */
790 DEFAULT(escseq.arg[0], 1);
791 tinsertblankline(escseq.arg[0]);
792 break;
793 case 'l': /* RM -- Reset Mode */
794 if(escseq.priv) {
795 switch(escseq.arg[0]) {
796 case 1:
797 term.mode &= ~MODE_APPKEYPAD;
798 break;
799 case 7:
800 term.mode &= ~MODE_WRAP;
801 break;
802 case 12: /* att610 -- Stop blinking cursor (IGNORED) */
803 break;
804 case 25:
805 term.c.state |= CURSOR_HIDE;
806 break;
807 case 1049: /* = 1047 and 1048 */
808 case 1047:
809 if(IS_SET(MODE_ALTSCREEN)) {
810 tclearregion(0, 0, term.col-1, term.row-1);
811 tswapscreen();
812 }
813 if(escseq.arg[0] == 1047)
814 break;
815 case 1048:
816 tcursor(CURSOR_LOAD);
817 break;
818 default:
819 goto unknown;
820 }
821 } else {
822 switch(escseq.arg[0]) {
823 case 4:
824 term.mode &= ~MODE_INSERT;
825 break;
826 default:
827 goto unknown;
828 }
829 }
830 break;
831 case 'M': /* DL -- Delete <n> lines */
832 DEFAULT(escseq.arg[0], 1);
833 tdeleteline(escseq.arg[0]);
834 break;
835 case 'X': /* ECH -- Erase <n> char */
836 DEFAULT(escseq.arg[0], 1);
837 tclearregion(term.c.x, term.c.y, term.c.x + escseq.arg[0], term.c.y);
838 break;
839 case 'P': /* DCH -- Delete <n> char */
840 DEFAULT(escseq.arg[0], 1);
841 tdeletechar(escseq.arg[0]);
842 break;
843 /* XXX: (CSI n Z) CBT -- Cursor Backward Tabulation <n> tab stops */
844 case 'd': /* VPA -- Move to <row> */
845 DEFAULT(escseq.arg[0], 1);
846 tmoveto(term.c.x, escseq.arg[0]-1);
847 break;
848 case 'h': /* SM -- Set terminal mode */
849 if(escseq.priv) {
850 switch(escseq.arg[0]) {
851 case 1:
852 term.mode |= MODE_APPKEYPAD;
853 break;
854 case 7:
855 term.mode |= MODE_WRAP;
856 break;
857 case 12: /* att610 -- Start blinking cursor (IGNORED) */
858 break;
859 case 25:
860 term.c.state &= ~CURSOR_HIDE;
861 break;
862 case 1049: /* = 1047 and 1048 */
863 case 1047:
864 if(IS_SET(MODE_ALTSCREEN))
865 tclearregion(0, 0, term.col-1, term.row-1);
866 else
867 tswapscreen();
868 if(escseq.arg[0] == 1047)
869 break;
870 case 1048:
871 tcursor(CURSOR_SAVE);
872 break;
873 default: goto unknown;
874 }
875 } else {
876 switch(escseq.arg[0]) {
877 case 4:
878 term.mode |= MODE_INSERT;
879 break;
880 default: goto unknown;
881 }
882 };
883 break;
884 case 'm': /* SGR -- Terminal attribute (color) */
885 tsetattr(escseq.arg, escseq.narg);
886 break;
887 case 'r': /* DECSTBM -- Set Scrolling Region */
888 if(escseq.priv)
889 goto unknown;
890 else {
891 DEFAULT(escseq.arg[0], 1);
892 DEFAULT(escseq.arg[1], term.row);
893 tsetscroll(escseq.arg[0]-1, escseq.arg[1]-1);
894 tmoveto(0, 0);
895 }
896 break;
897 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
898 tcursor(CURSOR_SAVE);
899 break;
900 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
901 tcursor(CURSOR_LOAD);
902 break;
903 }
904 }
905
906 void
907 csidump(void) {
908 int i;
909 printf("ESC [ %s", escseq.priv ? "? " : "");
910 if(escseq.narg)
911 for(i = 0; i < escseq.narg; i++)
912 printf("%d ", escseq.arg[i]);
913 if(escseq.mode)
914 putchar(escseq.mode);
915 putchar('\n');
916 }
917
918 void
919 csireset(void) {
920 memset(&escseq, 0, sizeof(escseq));
921 }
922
923 void
924 tputtab(void) {
925 int space = TAB - term.c.x % TAB;
926 tmoveto(term.c.x + space, term.c.y);
927 }
928
929 void
930 tputc(char c) {
931 if(term.esc & ESC_START) {
932 if(term.esc & ESC_CSI) {
933 escseq.buf[escseq.len++] = c;
934 if(BETWEEN(c, 0x40, 0x7E) || escseq.len >= ESC_BUF_SIZ) {
935 term.esc = 0;
936 csiparse(), csihandle();
937 }
938 /* TODO: handle other OSC */
939 } else if(term.esc & ESC_OSC) {
940 if(c == ';') {
941 term.titlelen = 0;
942 term.esc = ESC_START | ESC_TITLE;
943 }
944 } else if(term.esc & ESC_TITLE) {
945 if(c == '\a' || term.titlelen+1 >= ESC_TITLE_SIZ) {
946 term.esc = 0;
947 term.title[term.titlelen] = '\0';
948 XStoreName(xw.dis, xw.win, term.title);
949 } else {
950 term.title[term.titlelen++] = c;
951 }
952 } else if(term.esc & ESC_ALTCHARSET) {
953 switch(c) {
954 case '0': /* Line drawing crap */
955 term.c.attr.mode |= ATTR_GFX;
956 break;
957 case 'B': /* Back to regular text */
958 term.c.attr.mode &= ~ATTR_GFX;
959 break;
960 default:
961 printf("esc unhandled charset: ESC ( %c\n", c);
962 }
963 term.esc = 0;
964 } else {
965 switch(c) {
966 case '[':
967 term.esc |= ESC_CSI;
968 break;
969 case ']':
970 term.esc |= ESC_OSC;
971 break;
972 case '(':
973 term.esc |= ESC_ALTCHARSET;
974 break;
975 case 'D': /* IND -- Linefeed */
976 if(term.c.y == term.bot)
977 tscrollup(term.top, 1);
978 else
979 tmoveto(term.c.x, term.c.y+1);
980 term.esc = 0;
981 break;
982 case 'E': /* NEL -- Next line */
983 tnewline();
984 term.esc = 0;
985 break;
986 case 'M': /* RI -- Reverse index */
987 if(term.c.y == term.top)
988 tscrolldown(term.top, 1);
989 else
990 tmoveto(term.c.x, term.c.y-1);
991 term.esc = 0;
992 break;
993 case 'c': /* RIS -- Reset to inital state */
994 treset();
995 term.esc = 0;
996 break;
997 case '=': /* DECPAM -- Application keypad */
998 term.mode |= MODE_APPKEYPAD;
999 term.esc = 0;
1000 break;
1001 case '>': /* DECPNM -- Normal keypad */
1002 term.mode &= ~MODE_APPKEYPAD;
1003 term.esc = 0;
1004 break;
1005 case '7': /* DECSC -- Save Cursor */
1006 tcursor(CURSOR_SAVE);
1007 term.esc = 0;
1008 break;
1009 case '8': /* DECRC -- Restore Cursor */
1010 tcursor(CURSOR_LOAD);
1011 term.esc = 0;
1012 break;
1013 default:
1014 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n", c, isprint(c)?c:'.');
1015 term.esc = 0;
1016 }
1017 }
1018 } else {
1019 switch(c) {
1020 case '\t':
1021 tputtab();
1022 break;
1023 case '\b':
1024 tmoveto(term.c.x-1, term.c.y);
1025 break;
1026 case '\r':
1027 tmoveto(0, term.c.y);
1028 break;
1029 case '\n':
1030 tnewline();
1031 break;
1032 case '\a':
1033 if(!xw.hasfocus)
1034 xseturgency(1);
1035 break;
1036 case '\033':
1037 csireset();
1038 term.esc = ESC_START;
1039 break;
1040 default:
1041 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
1042 tnewline();
1043 tsetchar(c);
1044 if(term.c.x+1 < term.col)
1045 tmoveto(term.c.x+1, term.c.y);
1046 else
1047 term.c.state |= CURSOR_WRAPNEXT;
1048 break;
1049 }
1050 }
1051 }
1052
1053 void
1054 tputs(char *s, int len) {
1055 for(; len > 0; len--)
1056 tputc(*s++);
1057 }
1058
1059 void
1060 tresize(int col, int row) {
1061 int i;
1062 int minrow = MIN(row, term.row);
1063 int mincol = MIN(col, term.col);
1064 int slide = term.c.y - row + 1;
1065
1066 if(col < 1 || row < 1)
1067 return;
1068
1069 /* free unneeded rows */
1070 i = 0;
1071 if(slide > 0) {
1072 /* slide screen to keep cursor where we expect it -
1073 * tscrollup would work here, but we can optimize to
1074 * memmove because we're freeing the earlier lines */
1075 for(/* i = 0 */; i < slide; i++) {
1076 free(term.line[i]);
1077 free(term.alt[i]);
1078 }
1079 memmove(term.line, term.line + slide, row * sizeof(Line));
1080 memmove(term.alt, term.alt + slide, row * sizeof(Line));
1081 }
1082 for(i += row; i < term.row; i++) {
1083 free(term.line[i]);
1084 free(term.alt[i]);
1085 }
1086
1087 /* resize to new height */
1088 term.line = realloc(term.line, row * sizeof(Line));
1089 term.alt = realloc(term.alt, row * sizeof(Line));
1090
1091 /* resize each row to new width, zero-pad if needed */
1092 for(i = 0; i < minrow; i++) {
1093 term.line[i] = realloc(term.line[i], col * sizeof(Glyph));
1094 term.alt[i] = realloc(term.alt[i], col * sizeof(Glyph));
1095 memset(term.line[i] + mincol, 0, (col - mincol) * sizeof(Glyph));
1096 memset(term.alt[i] + mincol, 0, (col - mincol) * sizeof(Glyph));
1097 }
1098
1099 /* allocate any new rows */
1100 for(/* i == minrow */; i < row; i++) {
1101 term.line[i] = calloc(col, sizeof(Glyph));
1102 term.alt [i] = calloc(col, sizeof(Glyph));
1103 }
1104
1105 /* update terminal size */
1106 term.col = col, term.row = row;
1107 /* make use of the LIMIT in tmoveto */
1108 tmoveto(term.c.x, term.c.y);
1109 /* reset scrolling region */
1110 tsetscroll(0, row-1);
1111 }
1112
1113 void
1114 xloadcols(void) {
1115 int i, r, g, b;
1116 XColor color;
1117 Colormap cmap = DefaultColormap(xw.dis, xw.scr);
1118 unsigned long white = WhitePixel(xw.dis, xw.scr);
1119
1120 for(i = 0; i < 16; i++) {
1121 if (!XAllocNamedColor(xw.dis, cmap, colorname[i], &color, &color)) {
1122 dc.col[i] = white;
1123 fprintf(stderr, "Could not allocate color '%s'\n", colorname[i]);
1124 } else
1125 dc.col[i] = color.pixel;
1126 }
1127
1128 /* same colors as xterm */
1129 for(r = 0; r < 6; r++)
1130 for(g = 0; g < 6; g++)
1131 for(b = 0; b < 6; b++) {
1132 color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
1133 color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
1134 color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
1135 if (!XAllocColor(xw.dis, cmap, &color)) {
1136 dc.col[i] = white;
1137 fprintf(stderr, "Could not allocate color %d\n", i);
1138 } else
1139 dc.col[i] = color.pixel;
1140 i++;
1141 }
1142
1143 for(r = 0; r < 24; r++, i++) {
1144 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
1145 if (!XAllocColor(xw.dis, cmap, &color)) {
1146 dc.col[i] = white;
1147 fprintf(stderr, "Could not allocate color %d\n", i);
1148 } else
1149 dc.col[i] = color.pixel;
1150 }
1151 }
1152
1153 void
1154 xclear(int x1, int y1, int x2, int y2) {
1155 XSetForeground(xw.dis, dc.gc, dc.col[DefaultBG]);
1156 XFillRectangle(xw.dis, xw.buf, dc.gc,
1157 x1 * xw.cw, y1 * xw.ch,
1158 (x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch);
1159 }
1160
1161 void
1162 xhints(void)
1163 {
1164 XClassHint class = {TNAME, TNAME};
1165 XWMHints wm = {.flags = InputHint, .input = 1};
1166 XSizeHints size = {
1167 .flags = PSize | PResizeInc | PBaseSize,
1168 .height = xw.h,
1169 .width = xw.w,
1170 .height_inc = xw.ch,
1171 .width_inc = xw.cw,
1172 .base_height = 2*BORDER,
1173 .base_width = 2*BORDER,
1174 };
1175 XSetWMProperties(xw.dis, xw.win, NULL, NULL, NULL, 0, &size, &wm, &class);
1176 }
1177
1178 void
1179 xinit(void) {
1180 if(!(xw.dis = XOpenDisplay(NULL)))
1181 die("Can't open display\n");
1182 xw.scr = XDefaultScreen(xw.dis);
1183
1184 /* font */
1185 if(!(dc.font = XLoadQueryFont(xw.dis, FONT)) || !(dc.bfont = XLoadQueryFont(xw.dis, BOLDFONT)))
1186 die("Can't load font %s\n", dc.font ? BOLDFONT : FONT);
1187
1188 /* XXX: Assuming same size for bold font */
1189 xw.cw = dc.font->max_bounds.rbearing - dc.font->min_bounds.lbearing;
1190 xw.ch = dc.font->ascent + dc.font->descent;
1191
1192 /* colors */
1193 xloadcols();
1194
1195 /* windows */
1196 xw.bufh = term.row * xw.ch;
1197 xw.bufw = term.col * xw.cw;
1198 xw.h = xw.bufh + 2*BORDER;
1199 xw.w = xw.bufw + 2*BORDER;
1200 xw.win = XCreateSimpleWindow(xw.dis, XRootWindow(xw.dis, xw.scr), 0, 0,
1201 xw.w, xw.h, 0,
1202 dc.col[DefaultBG],
1203 dc.col[DefaultBG]);
1204 xw.buf = XCreatePixmap(xw.dis, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dis, xw.scr));
1205 /* gc */
1206 dc.gc = XCreateGC(xw.dis, xw.win, 0, NULL);
1207
1208 /* event mask */
1209 XSelectInput(xw.dis, xw.win, ExposureMask | KeyPressMask
1210 | StructureNotifyMask | FocusChangeMask | PointerMotionMask
1211 | ButtonPressMask | ButtonReleaseMask);
1212
1213 XMapWindow(xw.dis, xw.win);
1214 xhints();
1215 XStoreName(xw.dis, xw.win, opt_title ? opt_title : "st");
1216 XSync(xw.dis, 0);
1217 }
1218
1219 void
1220 xdraws(char *s, Glyph base, int x, int y, int len) {
1221 unsigned long xfg, xbg;
1222 int winx = x*xw.cw, winy = y*xw.ch + dc.font->ascent, width = len*xw.cw;
1223 int i;
1224
1225 if(base.mode & ATTR_REVERSE)
1226 xfg = dc.col[base.bg], xbg = dc.col[base.fg];
1227 else
1228 xfg = dc.col[base.fg], xbg = dc.col[base.bg];
1229
1230 XSetBackground(xw.dis, dc.gc, xbg);
1231 XSetForeground(xw.dis, dc.gc, xfg);
1232
1233 if(base.mode & ATTR_GFX)
1234 for(i = 0; i < len; i++) {
1235 char c = gfx[(unsigned int)s[i] % 256];
1236 if(c)
1237 s[i] = c;
1238 else if(s[i] > 0x5f)
1239 s[i] -= 0x5f;
1240 }
1241
1242 XSetFont(xw.dis, dc.gc, base.mode & ATTR_BOLD ? dc.bfont->fid : dc.font->fid);
1243 XDrawImageString(xw.dis, xw.buf, dc.gc, winx, winy, s, len);
1244
1245 if(base.mode & ATTR_UNDERLINE)
1246 XDrawLine(xw.dis, xw.buf, dc.gc, winx, winy+1, winx+width-1, winy+1);
1247 }
1248
1249 void
1250 xdrawcursor(void) {
1251 static int oldx = 0;
1252 static int oldy = 0;
1253 Glyph g = {' ', ATTR_NULL, DefaultBG, DefaultCS, 0};
1254
1255 LIMIT(oldx, 0, term.col-1);
1256 LIMIT(oldy, 0, term.row-1);
1257
1258 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
1259 g.c = term.line[term.c.y][term.c.x].c;
1260
1261 /* remove the old cursor */
1262 if(term.line[oldy][oldx].state & GLYPH_SET)
1263 xdraws(&term.line[oldy][oldx].c, term.line[oldy][oldx], oldx, oldy, 1);
1264 else
1265 xclear(oldx, oldy, oldx, oldy);
1266
1267 /* draw the new one */
1268 if(!(term.c.state & CURSOR_HIDE) && xw.hasfocus) {
1269 xdraws(&g.c, g, term.c.x, term.c.y, 1);
1270 oldx = term.c.x, oldy = term.c.y;
1271 }
1272 }
1273
1274 #ifdef DEBUG
1275 /* basic drawing routines */
1276 void
1277 xdrawc(int x, int y, Glyph g) {
1278 XRectangle r = { x * xw.cw, y * xw.ch, xw.cw, xw.ch };
1279 XSetBackground(xw.dis, dc.gc, dc.col[g.bg]);
1280 XSetForeground(xw.dis, dc.gc, dc.col[g.fg]);
1281 XSetFont(xw.dis, dc.gc, g.mode & ATTR_BOLD ? dc.bfont->fid : dc.font->fid);
1282 XDrawImageString(xw.dis, xw.buf, dc.gc, r.x, r.y+dc.font->ascent, &g.c, 1);
1283 }
1284
1285 void
1286 draw(int dummy) {
1287 int x, y;
1288
1289 xclear(0, 0, term.col-1, term.row-1);
1290 for(y = 0; y < term.row; y++)
1291 for(x = 0; x < term.col; x++)
1292 if(term.line[y][x].state & GLYPH_SET)
1293 xdrawc(x, y, term.line[y][x]);
1294
1295 xdrawcursor();
1296 XCopyArea(xw.dis, xw.buf, xw.win, dc.gc, 0, 0, xw.bufw, xw.bufh, BORDER, BORDER);
1297 XFlush(xw.dis);
1298 }
1299
1300 #else
1301 /* optimized drawing routine */
1302 void
1303 draw(int redraw_all) {
1304 int i, x, y, ox;
1305 Glyph base, new;
1306 char buf[DRAW_BUF_SIZ];
1307
1308 XSetForeground(xw.dis, dc.gc, dc.col[DefaultBG]);
1309 XFillRectangle(xw.dis, xw.buf, dc.gc, 0, 0, xw.bufw, xw.bufh);
1310 for(y = 0; y < term.row; y++) {
1311 base = term.line[y][0];
1312 i = ox = 0;
1313 for(x = 0; x < term.col; x++) {
1314 new = term.line[y][x];
1315 if(sel.bx!=-1 && new.c && selected(x, y))
1316 new.mode ^= ATTR_REVERSE;
1317 if(i > 0 && (!(new.state & GLYPH_SET) || ATTRCMP(base, new) ||
1318 i >= DRAW_BUF_SIZ)) {
1319 xdraws(buf, base, ox, y, i);
1320 i = 0;
1321 }
1322 if(new.state & GLYPH_SET) {
1323 if(i == 0) {
1324 ox = x;
1325 base = new;
1326 }
1327 buf[i++] = new.c;
1328 }
1329 }
1330 if(i > 0)
1331 xdraws(buf, base, ox, y, i);
1332 }
1333 xdrawcursor();
1334 XCopyArea(xw.dis, xw.buf, xw.win, dc.gc, 0, 0, xw.bufw, xw.bufh, BORDER, BORDER);
1335 XFlush(xw.dis);
1336 }
1337
1338 #endif
1339
1340 void
1341 expose(XEvent *ev) {
1342 draw(SCREEN_REDRAW);
1343 }
1344
1345 void
1346 xseturgency(int add) {
1347 XWMHints *h = XGetWMHints(xw.dis, xw.win);
1348 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
1349 XSetWMHints(xw.dis, xw.win, h);
1350 XFree(h);
1351 }
1352
1353 void
1354 focus(XEvent *ev) {
1355 if((xw.hasfocus = ev->type == FocusIn))
1356 xseturgency(0);
1357 draw(SCREEN_UPDATE);
1358 }
1359
1360 char*
1361 kmap(KeySym k) {
1362 int i;
1363 for(i = 0; i < LEN(key); i++)
1364 if(key[i].k == k)
1365 return (char*)key[i].s;
1366 return NULL;
1367 }
1368
1369 void
1370 kpress(XEvent *ev) {
1371 XKeyEvent *e = &ev->xkey;
1372 KeySym ksym;
1373 char buf[32];
1374 char *customkey;
1375 int len;
1376 int meta;
1377 int shift;
1378
1379 meta = e->state & Mod1Mask;
1380 shift = e->state & ShiftMask;
1381 len = XLookupString(e, buf, sizeof(buf), &ksym, NULL);
1382
1383 if((customkey = kmap(ksym)))
1384 ttywrite(customkey, strlen(customkey));
1385 else if(len > 0) {
1386 buf[sizeof(buf)-1] = '\0';
1387 if(meta && len == 1)
1388 ttywrite("\033", 1);
1389 ttywrite(buf, len);
1390 } else
1391 switch(ksym) {
1392 case XK_Up:
1393 case XK_Down:
1394 case XK_Left:
1395 case XK_Right:
1396 sprintf(buf, "\033%c%c", IS_SET(MODE_APPKEYPAD) ? 'O' : '[', "DACB"[ksym - XK_Left]);
1397 ttywrite(buf, 3);
1398 break;
1399 case XK_Insert:
1400 if(shift)
1401 selpaste(), draw(1);
1402 break;
1403 default:
1404 fprintf(stderr, "errkey: %d\n", (int)ksym);
1405 break;
1406 }
1407 }
1408
1409 void
1410 resize(XEvent *e) {
1411 int col, row;
1412
1413 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
1414 return;
1415
1416 xw.w = e->xconfigure.width;
1417 xw.h = e->xconfigure.height;
1418 xw.bufw = xw.w - 2*BORDER;
1419 xw.bufh = xw.h - 2*BORDER;
1420 col = xw.bufw / xw.cw;
1421 row = xw.bufh / xw.ch;
1422 tresize(col, row);
1423 ttyresize(col, row);
1424 xw.bufh = MAX(1, xw.bufh);
1425 xw.bufw = MAX(1, xw.bufw);
1426 XFreePixmap(xw.dis, xw.buf);
1427 xw.buf = XCreatePixmap(xw.dis, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dis, xw.scr));
1428 draw(SCREEN_REDRAW);
1429 }
1430
1431 void
1432 run(void) {
1433 XEvent ev;
1434 fd_set rfd;
1435 int xfd = XConnectionNumber(xw.dis);
1436
1437 for(;;) {
1438 FD_ZERO(&rfd);
1439 FD_SET(cmdfd, &rfd);
1440 FD_SET(xfd, &rfd);
1441 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, NULL) < 0) {
1442 if(errno == EINTR)
1443 continue;
1444 die("select failed: %s\n", SERRNO);
1445 }
1446 if(FD_ISSET(cmdfd, &rfd)) {
1447 ttyread();
1448 draw(SCREEN_UPDATE);
1449 }
1450 while(XPending(xw.dis)) {
1451 XNextEvent(xw.dis, &ev);
1452 if(handler[ev.type])
1453 (handler[ev.type])(&ev);
1454 }
1455 }
1456 }
1457
1458 int
1459 main(int argc, char *argv[]) {
1460 int i;
1461
1462 for(i = 1; i < argc; i++) {
1463 switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
1464 case 't':
1465 if(++i < argc) opt_title = argv[i];
1466 break;
1467 case 'e':
1468 if(++i < argc) opt_cmd = argv[i];
1469 break;
1470 case 'v':
1471 default:
1472 die(USAGE);
1473 }
1474 }
1475 setlocale(LC_CTYPE, "");
1476 tnew(80, 24);
1477 ttynew();
1478 xinit();
1479 selinit();
1480 run();
1481 return 0;
1482 }