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261612fb8d4a38f64a7504075a85b4d407d4a259
[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 5: /* TODO: DECSCNM -- Remove reverse video */
800 break;
801 case 7:
802 term.mode &= ~MODE_WRAP;
803 break;
804 case 12: /* att610 -- Stop blinking cursor (IGNORED) */
805 break;
806 case 25:
807 term.c.state |= CURSOR_HIDE;
808 break;
809 case 1049: /* = 1047 and 1048 */
810 case 1047:
811 if(IS_SET(MODE_ALTSCREEN)) {
812 tclearregion(0, 0, term.col-1, term.row-1);
813 tswapscreen();
814 }
815 if(escseq.arg[0] == 1047)
816 break;
817 case 1048:
818 tcursor(CURSOR_LOAD);
819 break;
820 default:
821 goto unknown;
822 }
823 } else {
824 switch(escseq.arg[0]) {
825 case 4:
826 term.mode &= ~MODE_INSERT;
827 break;
828 default:
829 goto unknown;
830 }
831 }
832 break;
833 case 'M': /* DL -- Delete <n> lines */
834 DEFAULT(escseq.arg[0], 1);
835 tdeleteline(escseq.arg[0]);
836 break;
837 case 'X': /* ECH -- Erase <n> char */
838 DEFAULT(escseq.arg[0], 1);
839 tclearregion(term.c.x, term.c.y, term.c.x + escseq.arg[0], term.c.y);
840 break;
841 case 'P': /* DCH -- Delete <n> char */
842 DEFAULT(escseq.arg[0], 1);
843 tdeletechar(escseq.arg[0]);
844 break;
845 /* XXX: (CSI n Z) CBT -- Cursor Backward Tabulation <n> tab stops */
846 case 'd': /* VPA -- Move to <row> */
847 DEFAULT(escseq.arg[0], 1);
848 tmoveto(term.c.x, escseq.arg[0]-1);
849 break;
850 case 'h': /* SM -- Set terminal mode */
851 if(escseq.priv) {
852 switch(escseq.arg[0]) {
853 case 1:
854 term.mode |= MODE_APPKEYPAD;
855 break;
856 case 5: /* DECSCNM -- Reverve video */
857 /* TODO: set REVERSE on the whole screen (f) */
858 break;
859 case 7:
860 term.mode |= MODE_WRAP;
861 break;
862 case 12: /* att610 -- Start blinking cursor (IGNORED) */
863 /* fallthrough for xterm cvvis = CSI [ ? 12 ; 25 h */
864 if(escseq.narg > 1 && escseq.arg[1] != 25)
865 break;
866 case 25:
867 term.c.state &= ~CURSOR_HIDE;
868 break;
869 case 1049: /* = 1047 and 1048 */
870 case 1047:
871 if(IS_SET(MODE_ALTSCREEN))
872 tclearregion(0, 0, term.col-1, term.row-1);
873 else
874 tswapscreen();
875 if(escseq.arg[0] == 1047)
876 break;
877 case 1048:
878 tcursor(CURSOR_SAVE);
879 break;
880 default: goto unknown;
881 }
882 } else {
883 switch(escseq.arg[0]) {
884 case 4:
885 term.mode |= MODE_INSERT;
886 break;
887 default: goto unknown;
888 }
889 };
890 break;
891 case 'm': /* SGR -- Terminal attribute (color) */
892 tsetattr(escseq.arg, escseq.narg);
893 break;
894 case 'r': /* DECSTBM -- Set Scrolling Region */
895 if(escseq.priv)
896 goto unknown;
897 else {
898 DEFAULT(escseq.arg[0], 1);
899 DEFAULT(escseq.arg[1], term.row);
900 tsetscroll(escseq.arg[0]-1, escseq.arg[1]-1);
901 tmoveto(0, 0);
902 }
903 break;
904 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
905 tcursor(CURSOR_SAVE);
906 break;
907 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
908 tcursor(CURSOR_LOAD);
909 break;
910 }
911 }
912
913 void
914 csidump(void) {
915 int i;
916 printf("ESC [ %s", escseq.priv ? "? " : "");
917 if(escseq.narg)
918 for(i = 0; i < escseq.narg; i++)
919 printf("%d ", escseq.arg[i]);
920 if(escseq.mode)
921 putchar(escseq.mode);
922 putchar('\n');
923 }
924
925 void
926 csireset(void) {
927 memset(&escseq, 0, sizeof(escseq));
928 }
929
930 void
931 tputtab(void) {
932 int space = TAB - term.c.x % TAB;
933 tmoveto(term.c.x + space, term.c.y);
934 }
935
936 void
937 tputc(char c) {
938 if(term.esc & ESC_START) {
939 if(term.esc & ESC_CSI) {
940 escseq.buf[escseq.len++] = c;
941 if(BETWEEN(c, 0x40, 0x7E) || escseq.len >= ESC_BUF_SIZ) {
942 term.esc = 0;
943 csiparse(), csihandle();
944 }
945 /* TODO: handle other OSC */
946 } else if(term.esc & ESC_OSC) {
947 if(c == ';') {
948 term.titlelen = 0;
949 term.esc = ESC_START | ESC_TITLE;
950 }
951 } else if(term.esc & ESC_TITLE) {
952 if(c == '\a' || term.titlelen+1 >= ESC_TITLE_SIZ) {
953 term.esc = 0;
954 term.title[term.titlelen] = '\0';
955 XStoreName(xw.dis, xw.win, term.title);
956 } else {
957 term.title[term.titlelen++] = c;
958 }
959 } else if(term.esc & ESC_ALTCHARSET) {
960 switch(c) {
961 case '0': /* Line drawing crap */
962 term.c.attr.mode |= ATTR_GFX;
963 break;
964 case 'B': /* Back to regular text */
965 term.c.attr.mode &= ~ATTR_GFX;
966 break;
967 default:
968 printf("esc unhandled charset: ESC ( %c\n", c);
969 }
970 term.esc = 0;
971 } else {
972 switch(c) {
973 case '[':
974 term.esc |= ESC_CSI;
975 break;
976 case ']':
977 term.esc |= ESC_OSC;
978 break;
979 case '(':
980 term.esc |= ESC_ALTCHARSET;
981 break;
982 case 'D': /* IND -- Linefeed */
983 if(term.c.y == term.bot)
984 tscrollup(term.top, 1);
985 else
986 tmoveto(term.c.x, term.c.y+1);
987 term.esc = 0;
988 break;
989 case 'E': /* NEL -- Next line */
990 tnewline();
991 term.esc = 0;
992 break;
993 case 'M': /* RI -- Reverse index */
994 if(term.c.y == term.top)
995 tscrolldown(term.top, 1);
996 else
997 tmoveto(term.c.x, term.c.y-1);
998 term.esc = 0;
999 break;
1000 case 'c': /* RIS -- Reset to inital state */
1001 treset();
1002 term.esc = 0;
1003 break;
1004 case '=': /* DECPAM -- Application keypad */
1005 term.mode |= MODE_APPKEYPAD;
1006 term.esc = 0;
1007 break;
1008 case '>': /* DECPNM -- Normal keypad */
1009 term.mode &= ~MODE_APPKEYPAD;
1010 term.esc = 0;
1011 break;
1012 case '7': /* DECSC -- Save Cursor */
1013 tcursor(CURSOR_SAVE);
1014 term.esc = 0;
1015 break;
1016 case '8': /* DECRC -- Restore Cursor */
1017 tcursor(CURSOR_LOAD);
1018 term.esc = 0;
1019 break;
1020 default:
1021 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n", c, isprint(c)?c:'.');
1022 term.esc = 0;
1023 }
1024 }
1025 } else {
1026 switch(c) {
1027 case '\t':
1028 tputtab();
1029 break;
1030 case '\b':
1031 tmoveto(term.c.x-1, term.c.y);
1032 break;
1033 case '\r':
1034 tmoveto(0, term.c.y);
1035 break;
1036 case '\n':
1037 tnewline();
1038 break;
1039 case '\a':
1040 if(!xw.hasfocus)
1041 xseturgency(1);
1042 break;
1043 case '\033':
1044 csireset();
1045 term.esc = ESC_START;
1046 break;
1047 default:
1048 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
1049 tnewline();
1050 tsetchar(c);
1051 if(term.c.x+1 < term.col)
1052 tmoveto(term.c.x+1, term.c.y);
1053 else
1054 term.c.state |= CURSOR_WRAPNEXT;
1055 break;
1056 }
1057 }
1058 }
1059
1060 void
1061 tputs(char *s, int len) {
1062 for(; len > 0; len--)
1063 tputc(*s++);
1064 }
1065
1066 void
1067 tresize(int col, int row) {
1068 int i;
1069 int minrow = MIN(row, term.row);
1070 int mincol = MIN(col, term.col);
1071 int slide = term.c.y - row + 1;
1072
1073 if(col < 1 || row < 1)
1074 return;
1075
1076 /* free unneeded rows */
1077 i = 0;
1078 if(slide > 0) {
1079 /* slide screen to keep cursor where we expect it -
1080 * tscrollup would work here, but we can optimize to
1081 * memmove because we're freeing the earlier lines */
1082 for(/* i = 0 */; i < slide; i++) {
1083 free(term.line[i]);
1084 free(term.alt[i]);
1085 }
1086 memmove(term.line, term.line + slide, row * sizeof(Line));
1087 memmove(term.alt, term.alt + slide, row * sizeof(Line));
1088 }
1089 for(i += row; i < term.row; i++) {
1090 free(term.line[i]);
1091 free(term.alt[i]);
1092 }
1093
1094 /* resize to new height */
1095 term.line = realloc(term.line, row * sizeof(Line));
1096 term.alt = realloc(term.alt, row * sizeof(Line));
1097
1098 /* resize each row to new width, zero-pad if needed */
1099 for(i = 0; i < minrow; i++) {
1100 term.line[i] = realloc(term.line[i], col * sizeof(Glyph));
1101 term.alt[i] = realloc(term.alt[i], col * sizeof(Glyph));
1102 memset(term.line[i] + mincol, 0, (col - mincol) * sizeof(Glyph));
1103 memset(term.alt[i] + mincol, 0, (col - mincol) * sizeof(Glyph));
1104 }
1105
1106 /* allocate any new rows */
1107 for(/* i == minrow */; i < row; i++) {
1108 term.line[i] = calloc(col, sizeof(Glyph));
1109 term.alt [i] = calloc(col, sizeof(Glyph));
1110 }
1111
1112 /* update terminal size */
1113 term.col = col, term.row = row;
1114 /* make use of the LIMIT in tmoveto */
1115 tmoveto(term.c.x, term.c.y);
1116 /* reset scrolling region */
1117 tsetscroll(0, row-1);
1118 }
1119
1120 void
1121 xloadcols(void) {
1122 int i, r, g, b;
1123 XColor color;
1124 Colormap cmap = DefaultColormap(xw.dis, xw.scr);
1125 unsigned long white = WhitePixel(xw.dis, xw.scr);
1126
1127 for(i = 0; i < 16; i++) {
1128 if (!XAllocNamedColor(xw.dis, cmap, colorname[i], &color, &color)) {
1129 dc.col[i] = white;
1130 fprintf(stderr, "Could not allocate color '%s'\n", colorname[i]);
1131 } else
1132 dc.col[i] = color.pixel;
1133 }
1134
1135 /* same colors as xterm */
1136 for(r = 0; r < 6; r++)
1137 for(g = 0; g < 6; g++)
1138 for(b = 0; b < 6; b++) {
1139 color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
1140 color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
1141 color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
1142 if (!XAllocColor(xw.dis, cmap, &color)) {
1143 dc.col[i] = white;
1144 fprintf(stderr, "Could not allocate color %d\n", i);
1145 } else
1146 dc.col[i] = color.pixel;
1147 i++;
1148 }
1149
1150 for(r = 0; r < 24; r++, i++) {
1151 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
1152 if (!XAllocColor(xw.dis, cmap, &color)) {
1153 dc.col[i] = white;
1154 fprintf(stderr, "Could not allocate color %d\n", i);
1155 } else
1156 dc.col[i] = color.pixel;
1157 }
1158 }
1159
1160 void
1161 xclear(int x1, int y1, int x2, int y2) {
1162 XSetForeground(xw.dis, dc.gc, dc.col[DefaultBG]);
1163 XFillRectangle(xw.dis, xw.buf, dc.gc,
1164 x1 * xw.cw, y1 * xw.ch,
1165 (x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch);
1166 }
1167
1168 void
1169 xhints(void)
1170 {
1171 XClassHint class = {TNAME, TNAME};
1172 XWMHints wm = {.flags = InputHint, .input = 1};
1173 XSizeHints size = {
1174 .flags = PSize | PResizeInc | PBaseSize,
1175 .height = xw.h,
1176 .width = xw.w,
1177 .height_inc = xw.ch,
1178 .width_inc = xw.cw,
1179 .base_height = 2*BORDER,
1180 .base_width = 2*BORDER,
1181 };
1182 XSetWMProperties(xw.dis, xw.win, NULL, NULL, NULL, 0, &size, &wm, &class);
1183 }
1184
1185 void
1186 xinit(void) {
1187 if(!(xw.dis = XOpenDisplay(NULL)))
1188 die("Can't open display\n");
1189 xw.scr = XDefaultScreen(xw.dis);
1190
1191 /* font */
1192 if(!(dc.font = XLoadQueryFont(xw.dis, FONT)) || !(dc.bfont = XLoadQueryFont(xw.dis, BOLDFONT)))
1193 die("Can't load font %s\n", dc.font ? BOLDFONT : FONT);
1194
1195 /* XXX: Assuming same size for bold font */
1196 xw.cw = dc.font->max_bounds.rbearing - dc.font->min_bounds.lbearing;
1197 xw.ch = dc.font->ascent + dc.font->descent;
1198
1199 /* colors */
1200 xloadcols();
1201
1202 /* windows */
1203 xw.bufh = term.row * xw.ch;
1204 xw.bufw = term.col * xw.cw;
1205 xw.h = xw.bufh + 2*BORDER;
1206 xw.w = xw.bufw + 2*BORDER;
1207 xw.win = XCreateSimpleWindow(xw.dis, XRootWindow(xw.dis, xw.scr), 0, 0,
1208 xw.w, xw.h, 0,
1209 dc.col[DefaultBG],
1210 dc.col[DefaultBG]);
1211 xw.buf = XCreatePixmap(xw.dis, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dis, xw.scr));
1212 /* gc */
1213 dc.gc = XCreateGC(xw.dis, xw.win, 0, NULL);
1214
1215 /* event mask */
1216 XSelectInput(xw.dis, xw.win, ExposureMask | KeyPressMask
1217 | StructureNotifyMask | FocusChangeMask | PointerMotionMask
1218 | ButtonPressMask | ButtonReleaseMask);
1219
1220 XMapWindow(xw.dis, xw.win);
1221 xhints();
1222 XStoreName(xw.dis, xw.win, opt_title ? opt_title : "st");
1223 XSync(xw.dis, 0);
1224 }
1225
1226 void
1227 xdraws(char *s, Glyph base, int x, int y, int len) {
1228 unsigned long xfg, xbg;
1229 int winx = x*xw.cw, winy = y*xw.ch + dc.font->ascent, width = len*xw.cw;
1230 int i;
1231
1232 if(base.mode & ATTR_REVERSE)
1233 xfg = dc.col[base.bg], xbg = dc.col[base.fg];
1234 else
1235 xfg = dc.col[base.fg], xbg = dc.col[base.bg];
1236
1237 XSetBackground(xw.dis, dc.gc, xbg);
1238 XSetForeground(xw.dis, dc.gc, xfg);
1239
1240 if(base.mode & ATTR_GFX)
1241 for(i = 0; i < len; i++) {
1242 char c = gfx[(unsigned int)s[i] % 256];
1243 if(c)
1244 s[i] = c;
1245 else if(s[i] > 0x5f)
1246 s[i] -= 0x5f;
1247 }
1248
1249 XSetFont(xw.dis, dc.gc, base.mode & ATTR_BOLD ? dc.bfont->fid : dc.font->fid);
1250 XDrawImageString(xw.dis, xw.buf, dc.gc, winx, winy, s, len);
1251
1252 if(base.mode & ATTR_UNDERLINE)
1253 XDrawLine(xw.dis, xw.buf, dc.gc, winx, winy+1, winx+width-1, winy+1);
1254 }
1255
1256 void
1257 xdrawcursor(void) {
1258 static int oldx = 0;
1259 static int oldy = 0;
1260 Glyph g = {' ', ATTR_NULL, DefaultBG, DefaultCS, 0};
1261
1262 LIMIT(oldx, 0, term.col-1);
1263 LIMIT(oldy, 0, term.row-1);
1264
1265 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
1266 g.c = term.line[term.c.y][term.c.x].c;
1267
1268 /* remove the old cursor */
1269 if(term.line[oldy][oldx].state & GLYPH_SET)
1270 xdraws(&term.line[oldy][oldx].c, term.line[oldy][oldx], oldx, oldy, 1);
1271 else
1272 xclear(oldx, oldy, oldx, oldy);
1273
1274 /* draw the new one */
1275 if(!(term.c.state & CURSOR_HIDE) && xw.hasfocus) {
1276 xdraws(&g.c, g, term.c.x, term.c.y, 1);
1277 oldx = term.c.x, oldy = term.c.y;
1278 }
1279 }
1280
1281 #ifdef DEBUG
1282 /* basic drawing routines */
1283 void
1284 xdrawc(int x, int y, Glyph g) {
1285 XRectangle r = { x * xw.cw, y * xw.ch, xw.cw, xw.ch };
1286 XSetBackground(xw.dis, dc.gc, dc.col[g.bg]);
1287 XSetForeground(xw.dis, dc.gc, dc.col[g.fg]);
1288 XSetFont(xw.dis, dc.gc, g.mode & ATTR_BOLD ? dc.bfont->fid : dc.font->fid);
1289 XDrawImageString(xw.dis, xw.buf, dc.gc, r.x, r.y+dc.font->ascent, &g.c, 1);
1290 }
1291
1292 void
1293 draw(int dummy) {
1294 int x, y;
1295
1296 xclear(0, 0, term.col-1, term.row-1);
1297 for(y = 0; y < term.row; y++)
1298 for(x = 0; x < term.col; x++)
1299 if(term.line[y][x].state & GLYPH_SET)
1300 xdrawc(x, y, term.line[y][x]);
1301
1302 xdrawcursor();
1303 XCopyArea(xw.dis, xw.buf, xw.win, dc.gc, 0, 0, xw.bufw, xw.bufh, BORDER, BORDER);
1304 XFlush(xw.dis);
1305 }
1306
1307 #else
1308 /* optimized drawing routine */
1309 void
1310 draw(int redraw_all) {
1311 int i, x, y, ox;
1312 Glyph base, new;
1313 char buf[DRAW_BUF_SIZ];
1314
1315 XSetForeground(xw.dis, dc.gc, dc.col[DefaultBG]);
1316 XFillRectangle(xw.dis, xw.buf, dc.gc, 0, 0, xw.bufw, xw.bufh);
1317 for(y = 0; y < term.row; y++) {
1318 base = term.line[y][0];
1319 i = ox = 0;
1320 for(x = 0; x < term.col; x++) {
1321 new = term.line[y][x];
1322 if(sel.bx!=-1 && new.c && selected(x, y))
1323 new.mode ^= ATTR_REVERSE;
1324 if(i > 0 && (!(new.state & GLYPH_SET) || ATTRCMP(base, new) ||
1325 i >= DRAW_BUF_SIZ)) {
1326 xdraws(buf, base, ox, y, i);
1327 i = 0;
1328 }
1329 if(new.state & GLYPH_SET) {
1330 if(i == 0) {
1331 ox = x;
1332 base = new;
1333 }
1334 buf[i++] = new.c;
1335 }
1336 }
1337 if(i > 0)
1338 xdraws(buf, base, ox, y, i);
1339 }
1340 xdrawcursor();
1341 XCopyArea(xw.dis, xw.buf, xw.win, dc.gc, 0, 0, xw.bufw, xw.bufh, BORDER, BORDER);
1342 XFlush(xw.dis);
1343 }
1344
1345 #endif
1346
1347 void
1348 expose(XEvent *ev) {
1349 draw(SCREEN_REDRAW);
1350 }
1351
1352 void
1353 xseturgency(int add) {
1354 XWMHints *h = XGetWMHints(xw.dis, xw.win);
1355 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
1356 XSetWMHints(xw.dis, xw.win, h);
1357 XFree(h);
1358 }
1359
1360 void
1361 focus(XEvent *ev) {
1362 if((xw.hasfocus = ev->type == FocusIn))
1363 xseturgency(0);
1364 draw(SCREEN_UPDATE);
1365 }
1366
1367 char*
1368 kmap(KeySym k) {
1369 int i;
1370 for(i = 0; i < LEN(key); i++)
1371 if(key[i].k == k)
1372 return (char*)key[i].s;
1373 return NULL;
1374 }
1375
1376 void
1377 kpress(XEvent *ev) {
1378 XKeyEvent *e = &ev->xkey;
1379 KeySym ksym;
1380 char buf[32];
1381 char *customkey;
1382 int len;
1383 int meta;
1384 int shift;
1385
1386 meta = e->state & Mod1Mask;
1387 shift = e->state & ShiftMask;
1388 len = XLookupString(e, buf, sizeof(buf), &ksym, NULL);
1389
1390 if((customkey = kmap(ksym)))
1391 ttywrite(customkey, strlen(customkey));
1392 else if(len > 0) {
1393 buf[sizeof(buf)-1] = '\0';
1394 if(meta && len == 1)
1395 ttywrite("\033", 1);
1396 ttywrite(buf, len);
1397 } else
1398 switch(ksym) {
1399 case XK_Up:
1400 case XK_Down:
1401 case XK_Left:
1402 case XK_Right:
1403 sprintf(buf, "\033%c%c", IS_SET(MODE_APPKEYPAD) ? 'O' : '[', "DACB"[ksym - XK_Left]);
1404 ttywrite(buf, 3);
1405 break;
1406 case XK_Insert:
1407 if(shift)
1408 selpaste(), draw(1);
1409 break;
1410 default:
1411 fprintf(stderr, "errkey: %d\n", (int)ksym);
1412 break;
1413 }
1414 }
1415
1416 void
1417 resize(XEvent *e) {
1418 int col, row;
1419
1420 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
1421 return;
1422
1423 xw.w = e->xconfigure.width;
1424 xw.h = e->xconfigure.height;
1425 xw.bufw = xw.w - 2*BORDER;
1426 xw.bufh = xw.h - 2*BORDER;
1427 col = xw.bufw / xw.cw;
1428 row = xw.bufh / xw.ch;
1429 tresize(col, row);
1430 ttyresize(col, row);
1431 xw.bufh = MAX(1, xw.bufh);
1432 xw.bufw = MAX(1, xw.bufw);
1433 XFreePixmap(xw.dis, xw.buf);
1434 xw.buf = XCreatePixmap(xw.dis, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dis, xw.scr));
1435 draw(SCREEN_REDRAW);
1436 }
1437
1438 void
1439 run(void) {
1440 XEvent ev;
1441 fd_set rfd;
1442 int xfd = XConnectionNumber(xw.dis);
1443
1444 for(;;) {
1445 FD_ZERO(&rfd);
1446 FD_SET(cmdfd, &rfd);
1447 FD_SET(xfd, &rfd);
1448 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, NULL) < 0) {
1449 if(errno == EINTR)
1450 continue;
1451 die("select failed: %s\n", SERRNO);
1452 }
1453 if(FD_ISSET(cmdfd, &rfd)) {
1454 ttyread();
1455 draw(SCREEN_UPDATE);
1456 }
1457 while(XPending(xw.dis)) {
1458 XNextEvent(xw.dis, &ev);
1459 if(handler[ev.type])
1460 (handler[ev.type])(&ev);
1461 }
1462 }
1463 }
1464
1465 int
1466 main(int argc, char *argv[]) {
1467 int i;
1468
1469 for(i = 1; i < argc; i++) {
1470 switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
1471 case 't':
1472 if(++i < argc) opt_title = argv[i];
1473 break;
1474 case 'e':
1475 if(++i < argc) opt_cmd = argv[i];
1476 break;
1477 case 'v':
1478 default:
1479 die(USAGE);
1480 }
1481 }
1482 setlocale(LC_CTYPE, "");
1483 tnew(80, 24);
1484 ttynew();
1485 xinit();
1486 selinit();
1487 run();
1488 return 0;
1489 }