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c2f294a94f37fba153da80f3c68184a996b3bfa0
[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 typedef struct {
129 int mode;
130 int bx, by;
131 int ex, ey;
132 int b[2], e[2];
133 char *clip;
134 } Selection;
135
136 #include "config.h"
137
138 static void die(const char *errstr, ...);
139 static void draw(int);
140 static void execsh(void);
141 static void sigchld(int);
142 static void run(void);
143
144 static void csidump(void);
145 static void csihandle(void);
146 static void csiparse(void);
147 static void csireset(void);
148
149 static void tclearregion(int, int, int, int);
150 static void tcursor(int);
151 static void tdeletechar(int);
152 static void tdeleteline(int);
153 static void tinsertblank(int);
154 static void tinsertblankline(int);
155 static void tmoveto(int, int);
156 static void tnew(int, int);
157 static void tnewline(void);
158 static void tputtab(void);
159 static void tputc(char);
160 static void tputs(char*, int);
161 static void treset(void);
162 static void tresize(int, int);
163 static void tscrollup(int);
164 static void tscrolldown(int);
165 static void tsetattr(int*, int);
166 static void tsetchar(char);
167 static void tsetscroll(int, int);
168 static void tswapscreen(void);
169
170 static void ttynew(void);
171 static void ttyread(void);
172 static void ttyresize(int, int);
173 static void ttywrite(const char *, size_t);
174
175 static void xdraws(char *, Glyph, int, int, int);
176 static void xhints(void);
177 static void xclear(int, int, int, int);
178 static void xdrawcursor(void);
179 static void xinit(void);
180 static void xloadcols(void);
181 static void xseturgency(int);
182
183 static void expose(XEvent *);
184 static char* kmap(KeySym);
185 static void kpress(XEvent *);
186 static void resize(XEvent *);
187 static void focus(XEvent *);
188 static void brelease(XEvent *);
189 static void bpress(XEvent *);
190 static void bmotion(XEvent *);
191
192
193 static void (*handler[LASTEvent])(XEvent *) = {
194 [KeyPress] = kpress,
195 [Expose] = expose,
196 [ConfigureNotify] = resize,
197 [FocusIn] = focus,
198 [FocusOut] = focus,
199 [MotionNotify] = bmotion,
200 [ButtonPress] = bpress,
201 [ButtonRelease] = brelease,
202 };
203
204 /* Globals */
205 static DC dc;
206 static XWindow xw;
207 static Term term;
208 static CSIEscape escseq;
209 static int cmdfd;
210 static pid_t pid;
211 static Selection sel;
212
213 void
214 selinit(void) {
215 sel.mode = 0;
216 sel.bx = -1;
217 sel.clip = NULL;
218 }
219
220 static inline int selected(int x, int y) {
221 if ((sel.ey==y && sel.by==y)) {
222 int bx = MIN(sel.bx, sel.ex);
223 int ex = MAX(sel.bx, sel.ex);
224 return (x>=bx && x<=ex);
225 }
226 return (((y>sel.b[1] && y<sel.e[1]) || (y==sel.e[1] && x<=sel.e[0])) || \
227 (y==sel.b[1] && x>=sel.b[0] && (x<=sel.e[0] || sel.b[1]!=sel.e[1])));
228 }
229
230 static void getbuttoninfo(XEvent *e, int *b, int *x, int *y) {
231 if(b) *b = e->xbutton.state,
232 *b=*b==4096?5:*b==2048?4:*b==1024?3:*b==512?2:*b==256?1:-1;
233 *x = e->xbutton.x/xw.cw;
234 *y = e->xbutton.y/xw.ch;
235 sel.b[0] = sel.by<sel.ey?sel.bx:sel.ex;
236 sel.b[1] = MIN(sel.by, sel.ey);
237 sel.e[0] = sel.by<sel.ey?sel.ex:sel.bx;
238 sel.e[1] = MAX(sel.by, sel.ey);
239 }
240
241 static void bpress(XEvent *e) {
242 sel.mode = 1;
243 sel.ex = sel.bx = e->xbutton.x/xw.cw;
244 sel.ey = sel.by = e->xbutton.y/xw.ch;
245 }
246
247 static char *getseltext() {
248 char *str, *ptr;
249 int ls, x, y, sz;
250 if(sel.bx==-1)
251 return NULL;
252 sz = ((term.col+1) * (sel.e[1]-sel.b[1]+1));
253 ptr = str = malloc (sz);
254 for(y = 0; y < term.row; y++) {
255 for(x = 0; x < term.col; x++) {
256 if(term.line[y][x].state & GLYPH_SET && (ls=selected(x, y)))
257 *ptr = term.line[y][x].c, ptr++;
258 }
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] = {0};
391 int ret;
392
393 if((ret = read(cmdfd, buf, BUFSIZ)) < 0)
394 die("Couldn't read from shell: %s\n", SERRNO);
395 else
396 tputs(buf, ret);
397 }
398
399 void
400 ttywrite(const char *s, size_t n) {
401 if(write(cmdfd, s, n) == -1)
402 die("write error on tty: %s\n", SERRNO);
403 }
404
405 void
406 ttyresize(int x, int y) {
407 struct winsize w;
408
409 w.ws_row = term.row;
410 w.ws_col = term.col;
411 w.ws_xpixel = w.ws_ypixel = 0;
412 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
413 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
414 }
415
416 void
417 tcursor(int mode) {
418 static TCursor c;
419
420 if(mode == CURSOR_SAVE)
421 c = term.c;
422 else if(mode == CURSOR_LOAD)
423 term.c = c, tmoveto(c.x, c.y);
424 }
425
426 void
427 treset(void) {
428 term.c = (TCursor){{
429 .mode = ATTR_NULL,
430 .fg = DefaultFG,
431 .bg = DefaultBG
432 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
433
434 term.top = 0, term.bot = term.row - 1;
435 term.mode = MODE_WRAP;
436 tclearregion(0, 0, term.col-1, term.row-1);
437 }
438
439 void
440 tnew(int col, int row) {
441 /* set screen size */
442 term.row = row, term.col = col;
443 term.line = malloc(term.row * sizeof(Line));
444 term.alt = malloc(term.row * sizeof(Line));
445 for(row = 0 ; row < term.row; row++) {
446 term.line[row] = malloc(term.col * sizeof(Glyph));
447 term.alt [row] = malloc(term.col * sizeof(Glyph));
448 }
449 /* setup screen */
450 treset();
451 }
452
453 void
454 tswapscreen(void) {
455 Line* tmp = term.line;
456 term.line = term.alt;
457 term.alt = tmp;
458 term.mode ^= MODE_ALTSCREEN;
459 }
460
461 void
462 tscrolldown (int n) {
463 int i;
464 Line temp;
465
466 LIMIT(n, 0, term.bot-term.top+1);
467
468 for(i = 0; i < n; i++)
469 memset(term.line[term.bot-i], 0, term.col*sizeof(Glyph));
470
471 for(i = term.bot; i >= term.top+n; i--) {
472 temp = term.line[i];
473 term.line[i] = term.line[i-n];
474 term.line[i-n] = temp;
475 }
476 }
477
478 void
479 tscrollup (int n) {
480 int i;
481 Line temp;
482 LIMIT(n, 0, term.bot-term.top+1);
483
484 for(i = 0; i < n; i++)
485 memset(term.line[term.top+i], 0, term.col*sizeof(Glyph));
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.bot)
595 bot = term.row - 1;
596 else if(term.c.y < term.top)
597 bot = term.top - 1;
598 if(term.c.y + n >= bot) {
599 tclearregion(0, term.c.y, term.col-1, bot);
600 return;
601 }
602 for(i = bot; i >= term.c.y+n; i--) {
603 /* swap deleted line <-> blanked line */
604 blank = term.line[i];
605 term.line[i] = term.line[i-n];
606 term.line[i-n] = blank;
607 /* blank it */
608 memset(blank, 0, term.col * sizeof(Glyph));
609 }
610 }
611
612 void
613 tdeleteline(int n) {
614 int i;
615 Line blank;
616 int bot = term.bot;
617
618 if(term.c.y > term.bot)
619 bot = term.row - 1;
620 else if(term.c.y < term.top)
621 bot = term.top - 1;
622 if(term.c.y + n >= bot) {
623 tclearregion(0, term.c.y, term.col-1, bot);
624 return;
625 }
626 for(i = term.c.y; i <= bot-n; i++) {
627 /* swap deleted line <-> blanked line */
628 blank = term.line[i];
629 term.line[i] = term.line[i+n];
630 term.line[i+n] = blank;
631 /* blank it */
632 memset(blank, 0, term.col * sizeof(Glyph));
633 }
634 }
635
636 void
637 tsetattr(int *attr, int l) {
638 int i;
639
640 for(i = 0; i < l; i++) {
641 switch(attr[i]) {
642 case 0:
643 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD);
644 term.c.attr.fg = DefaultFG;
645 term.c.attr.bg = DefaultBG;
646 break;
647 case 1:
648 term.c.attr.mode |= ATTR_BOLD;
649 break;
650 case 4:
651 term.c.attr.mode |= ATTR_UNDERLINE;
652 break;
653 case 7:
654 term.c.attr.mode |= ATTR_REVERSE;
655 break;
656 case 22:
657 term.c.attr.mode &= ~ATTR_BOLD;
658 break;
659 case 24:
660 term.c.attr.mode &= ~ATTR_UNDERLINE;
661 break;
662 case 27:
663 term.c.attr.mode &= ~ATTR_REVERSE;
664 break;
665 case 38:
666 if (i + 2 < l && attr[i + 1] == 5) {
667 i += 2;
668 if (BETWEEN(attr[i], 0, 255))
669 term.c.attr.fg = attr[i];
670 else
671 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[i]);
672 }
673 else
674 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
675 break;
676 case 39:
677 term.c.attr.fg = DefaultFG;
678 break;
679 case 48:
680 if (i + 2 < l && attr[i + 1] == 5) {
681 i += 2;
682 if (BETWEEN(attr[i], 0, 255))
683 term.c.attr.bg = attr[i];
684 else
685 fprintf(stderr, "erresc: bad bgcolor %d\n", attr[i]);
686 }
687 else
688 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
689 break;
690 case 49:
691 term.c.attr.bg = DefaultBG;
692 break;
693 default:
694 if(BETWEEN(attr[i], 30, 37))
695 term.c.attr.fg = attr[i] - 30;
696 else if(BETWEEN(attr[i], 40, 47))
697 term.c.attr.bg = attr[i] - 40;
698 else if(BETWEEN(attr[i], 90, 97))
699 term.c.attr.fg = attr[i] - 90 + 8;
700 else if(BETWEEN(attr[i], 100, 107))
701 term.c.attr.fg = attr[i] - 100 + 8;
702 else
703 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
704 break;
705 }
706 }
707 }
708
709 void
710 tsetscroll(int t, int b) {
711 int temp;
712
713 LIMIT(t, 0, term.row-1);
714 LIMIT(b, 0, term.row-1);
715 if(t > b) {
716 temp = t;
717 t = b;
718 b = temp;
719 }
720 term.top = t;
721 term.bot = b;
722 }
723
724 void
725 csihandle(void) {
726 switch(escseq.mode) {
727 default:
728 unknown:
729 printf("erresc: unknown csi ");
730 csidump();
731 /* die(""); */
732 break;
733 case '@': /* ICH -- Insert <n> blank char */
734 DEFAULT(escseq.arg[0], 1);
735 tinsertblank(escseq.arg[0]);
736 break;
737 case 'A': /* CUU -- Cursor <n> Up */
738 case 'e':
739 DEFAULT(escseq.arg[0], 1);
740 tmoveto(term.c.x, term.c.y-escseq.arg[0]);
741 break;
742 case 'B': /* CUD -- Cursor <n> Down */
743 DEFAULT(escseq.arg[0], 1);
744 tmoveto(term.c.x, term.c.y+escseq.arg[0]);
745 break;
746 case 'C': /* CUF -- Cursor <n> Forward */
747 case 'a':
748 DEFAULT(escseq.arg[0], 1);
749 tmoveto(term.c.x+escseq.arg[0], term.c.y);
750 break;
751 case 'D': /* CUB -- Cursor <n> Backward */
752 DEFAULT(escseq.arg[0], 1);
753 tmoveto(term.c.x-escseq.arg[0], term.c.y);
754 break;
755 case 'E': /* CNL -- Cursor <n> Down and first col */
756 DEFAULT(escseq.arg[0], 1);
757 tmoveto(0, term.c.y+escseq.arg[0]);
758 break;
759 case 'F': /* CPL -- Cursor <n> Up and first col */
760 DEFAULT(escseq.arg[0], 1);
761 tmoveto(0, term.c.y-escseq.arg[0]);
762 break;
763 case 'G': /* CHA -- Move to <col> */
764 case '`': /* XXX: HPA -- same? */
765 DEFAULT(escseq.arg[0], 1);
766 tmoveto(escseq.arg[0]-1, term.c.y);
767 break;
768 case 'H': /* CUP -- Move to <row> <col> */
769 case 'f': /* XXX: HVP -- same? */
770 DEFAULT(escseq.arg[0], 1);
771 DEFAULT(escseq.arg[1], 1);
772 tmoveto(escseq.arg[1]-1, escseq.arg[0]-1);
773 break;
774 /* XXX: (CSI n I) CHT -- Cursor Forward Tabulation <n> tab stops */
775 case 'J': /* ED -- Clear screen */
776 switch(escseq.arg[0]) {
777 case 0: /* below */
778 tclearregion(term.c.x, term.c.y, term.col-1, term.row-1);
779 break;
780 case 1: /* above */
781 tclearregion(0, 0, term.c.x, term.c.y);
782 break;
783 case 2: /* all */
784 tclearregion(0, 0, term.col-1, term.row-1);
785 break;
786 default:
787 goto unknown;
788 }
789 break;
790 case 'K': /* EL -- Clear line */
791 switch(escseq.arg[0]) {
792 case 0: /* right */
793 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
794 break;
795 case 1: /* left */
796 tclearregion(0, term.c.y, term.c.x, term.c.y);
797 break;
798 case 2: /* all */
799 tclearregion(0, term.c.y, term.col-1, term.c.y);
800 break;
801 }
802 break;
803 case 'S': /* SU -- Scroll <n> line up */
804 DEFAULT(escseq.arg[0], 1);
805 tscrollup(escseq.arg[0]);
806 break;
807 case 'T': /* SD -- Scroll <n> line down */
808 DEFAULT(escseq.arg[0], 1);
809 tscrolldown(escseq.arg[0]);
810 break;
811 case 'L': /* IL -- Insert <n> blank lines */
812 DEFAULT(escseq.arg[0], 1);
813 tinsertblankline(escseq.arg[0]);
814 break;
815 case 'l': /* RM -- Reset Mode */
816 if(escseq.priv) {
817 switch(escseq.arg[0]) {
818 case 1:
819 term.mode &= ~MODE_APPKEYPAD;
820 break;
821 case 7:
822 term.mode &= ~MODE_WRAP;
823 break;
824 case 12: /* att610 -- Stop blinking cursor (IGNORED) */
825 break;
826 case 25:
827 term.c.state |= CURSOR_HIDE;
828 break;
829 case 1049: /* = 1047 and 1048 */
830 case 1047:
831 if(IS_SET(MODE_ALTSCREEN)) {
832 tclearregion(0, 0, term.col-1, term.row-1);
833 tswapscreen();
834 }
835 if(escseq.arg[0] == 1047)
836 break;
837 case 1048:
838 tcursor(CURSOR_LOAD);
839 break;
840 default:
841 goto unknown;
842 }
843 } else {
844 switch(escseq.arg[0]) {
845 case 4:
846 term.mode &= ~MODE_INSERT;
847 break;
848 default:
849 goto unknown;
850 }
851 }
852 break;
853 case 'M': /* DL -- Delete <n> lines */
854 DEFAULT(escseq.arg[0], 1);
855 tdeleteline(escseq.arg[0]);
856 break;
857 case 'X': /* ECH -- Erase <n> char */
858 DEFAULT(escseq.arg[0], 1);
859 tclearregion(term.c.x, term.c.y, term.c.x + escseq.arg[0], term.c.y);
860 break;
861 case 'P': /* DCH -- Delete <n> char */
862 DEFAULT(escseq.arg[0], 1);
863 tdeletechar(escseq.arg[0]);
864 break;
865 /* XXX: (CSI n Z) CBT -- Cursor Backward Tabulation <n> tab stops */
866 case 'd': /* VPA -- Move to <row> */
867 DEFAULT(escseq.arg[0], 1);
868 tmoveto(term.c.x, escseq.arg[0]-1);
869 break;
870 case 'h': /* SM -- Set terminal mode */
871 if(escseq.priv) {
872 switch(escseq.arg[0]) {
873 case 1:
874 term.mode |= MODE_APPKEYPAD;
875 break;
876 case 7:
877 term.mode |= MODE_WRAP;
878 break;
879 case 12: /* att610 -- Start blinking cursor (IGNORED) */
880 break;
881 case 25:
882 term.c.state &= ~CURSOR_HIDE;
883 break;
884 case 1049: /* = 1047 and 1048 */
885 case 1047:
886 if(IS_SET(MODE_ALTSCREEN))
887 tclearregion(0, 0, term.col-1, term.row-1);
888 else
889 tswapscreen();
890 if(escseq.arg[0] == 1047)
891 break;
892 case 1048:
893 tcursor(CURSOR_SAVE);
894 break;
895 default: goto unknown;
896 }
897 } else {
898 switch(escseq.arg[0]) {
899 case 4:
900 term.mode |= MODE_INSERT;
901 break;
902 default: goto unknown;
903 }
904 };
905 break;
906 case 'm': /* SGR -- Terminal attribute (color) */
907 tsetattr(escseq.arg, escseq.narg);
908 break;
909 case 'r': /* DECSTBM -- Set Scrolling Region */
910 if(escseq.priv)
911 goto unknown;
912 else {
913 DEFAULT(escseq.arg[0], 1);
914 DEFAULT(escseq.arg[1], term.row);
915 tsetscroll(escseq.arg[0]-1, escseq.arg[1]-1);
916 tmoveto(0, 0);
917 }
918 break;
919 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
920 tcursor(CURSOR_SAVE);
921 break;
922 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
923 tcursor(CURSOR_LOAD);
924 break;
925 }
926 }
927
928 void
929 csidump(void) {
930 int i;
931 printf("ESC [ %s", escseq.priv ? "? " : "");
932 if(escseq.narg)
933 for(i = 0; i < escseq.narg; i++)
934 printf("%d ", escseq.arg[i]);
935 if(escseq.mode)
936 putchar(escseq.mode);
937 putchar('\n');
938 }
939
940 void
941 csireset(void) {
942 memset(&escseq, 0, sizeof(escseq));
943 }
944
945 void
946 tputtab(void) {
947 int space = TAB - term.c.x % TAB;
948 tmoveto(term.c.x + space, term.c.y);
949 }
950
951 void
952 tputc(char c) {
953 if(term.esc & ESC_START) {
954 if(term.esc & ESC_CSI) {
955 escseq.buf[escseq.len++] = c;
956 if(BETWEEN(c, 0x40, 0x7E) || escseq.len >= ESC_BUF_SIZ) {
957 term.esc = 0;
958 csiparse(), csihandle();
959 }
960 } else if(term.esc & ESC_OSC) {
961 if(c == ';') {
962 term.titlelen = 0;
963 term.esc = ESC_START | ESC_TITLE;
964 }
965 } else if(term.esc & ESC_TITLE) {
966 if(c == '\a' || term.titlelen+1 >= ESC_TITLE_SIZ) {
967 term.esc = 0;
968 term.title[term.titlelen] = '\0';
969 XStoreName(xw.dis, xw.win, term.title);
970 } else {
971 term.title[term.titlelen++] = c;
972 }
973 } else if(term.esc & ESC_ALTCHARSET) {
974 switch(c) {
975 case '0': /* Line drawing crap */
976 term.c.attr.mode |= ATTR_GFX;
977 break;
978 case 'B': /* Back to regular text */
979 term.c.attr.mode &= ~ATTR_GFX;
980 break;
981 default:
982 printf("esc unhandled charset: ESC ( %c\n", c);
983 }
984 term.esc = 0;
985 } else {
986 switch(c) {
987 case '[':
988 term.esc |= ESC_CSI;
989 break;
990 case ']':
991 term.esc |= ESC_OSC;
992 break;
993 case '(':
994 term.esc |= ESC_ALTCHARSET;
995 break;
996 case 'D': /* IND -- Linefeed */
997 if(term.c.y == term.bot)
998 tscrollup(1);
999 else
1000 tmoveto(term.c.x, term.c.y+1);
1001 term.esc = 0;
1002 break;
1003 case 'E': /* NEL -- Next line */
1004 tnewline();
1005 term.esc = 0;
1006 break;
1007 case 'M': /* RI -- Reverse index */
1008 if(term.c.y == term.top)
1009 tscrolldown(1);
1010 else
1011 tmoveto(term.c.x, term.c.y-1);
1012 term.esc = 0;
1013 break;
1014 case 'c': /* RIS -- Reset to inital state */
1015 treset();
1016 term.esc = 0;
1017 break;
1018 case '=': /* DECPAM -- Application keypad */
1019 term.mode |= MODE_APPKEYPAD;
1020 term.esc = 0;
1021 break;
1022 case '>': /* DECPNM -- Normal keypad */
1023 term.mode &= ~MODE_APPKEYPAD;
1024 term.esc = 0;
1025 break;
1026 case '7': /* DECSC -- Save Cursor */
1027 tcursor(CURSOR_SAVE);
1028 term.esc = 0;
1029 break;
1030 case '8': /* DECRC -- Restore Cursor */
1031 tcursor(CURSOR_LOAD);
1032 term.esc = 0;
1033 break;
1034 default:
1035 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n", c, isprint(c)?c:'.');
1036 term.esc = 0;
1037 }
1038 }
1039 } else {
1040 switch(c) {
1041 case '\t':
1042 tputtab();
1043 break;
1044 case '\b':
1045 tmoveto(term.c.x-1, term.c.y);
1046 break;
1047 case '\r':
1048 tmoveto(0, term.c.y);
1049 break;
1050 case '\n':
1051 tnewline();
1052 break;
1053 case '\a':
1054 if(!xw.hasfocus)
1055 xseturgency(1);
1056 break;
1057 case '\033':
1058 csireset();
1059 term.esc = ESC_START;
1060 break;
1061 default:
1062 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
1063 tnewline();
1064 tsetchar(c);
1065 if(term.c.x+1 < term.col)
1066 tmoveto(term.c.x+1, term.c.y);
1067 else
1068 term.c.state |= CURSOR_WRAPNEXT;
1069 break;
1070 }
1071 }
1072 }
1073
1074 void
1075 tputs(char *s, int len) {
1076 for(; len > 0; len--)
1077 tputc(*s++);
1078 }
1079
1080 void
1081 tresize(int col, int row) {
1082 int i;
1083 int minrow = MIN(row, term.row);
1084 int mincol = MIN(col, term.col);
1085
1086 if(col < 1 || row < 1)
1087 return;
1088
1089 /* free uneeded rows */
1090 for(i = row; i < term.row; i++) {
1091 free(term.line[i]);
1092 free(term.alt[i]);
1093 }
1094
1095 /* resize to new height */
1096 term.line = realloc(term.line, row * sizeof(Line));
1097 term.alt = realloc(term.alt, row * sizeof(Line));
1098
1099 /* resize each row to new width, zero-pad if needed */
1100 for(i = 0; i < minrow; i++) {
1101 term.line[i] = realloc(term.line[i], col * sizeof(Glyph));
1102 term.alt[i] = realloc(term.alt[i], col * sizeof(Glyph));
1103 memset(term.line[i] + mincol, 0, (col - mincol) * sizeof(Glyph));
1104 memset(term.alt[i] + mincol, 0, (col - mincol) * sizeof(Glyph));
1105 }
1106
1107 /* allocate any new rows */
1108 for(/* i == minrow */; i < row; i++) {
1109 term.line[i] = calloc(col, sizeof(Glyph));
1110 term.alt [i] = calloc(col, sizeof(Glyph));
1111 }
1112
1113 /* update terminal size */
1114 term.col = col, term.row = row;
1115 /* make use of the LIMIT in tmoveto */
1116 tmoveto(term.c.x, term.c.y);
1117 /* reset scrolling region */
1118 tsetscroll(0, row-1);
1119 }
1120
1121 void
1122 xloadcols(void) {
1123 int i, r, g, b;
1124 XColor color;
1125 Colormap cmap = DefaultColormap(xw.dis, xw.scr);
1126 unsigned long white = WhitePixel(xw.dis, xw.scr);
1127
1128 for(i = 0; i < 16; i++) {
1129 if (!XAllocNamedColor(xw.dis, cmap, colorname[i], &color, &color)) {
1130 dc.col[i] = white;
1131 fprintf(stderr, "Could not allocate color '%s'\n", colorname[i]);
1132 } else
1133 dc.col[i] = color.pixel;
1134 }
1135
1136 /* same colors as xterm */
1137 for(r = 0; r < 6; r++)
1138 for(g = 0; g < 6; g++)
1139 for(b = 0; b < 6; b++) {
1140 color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
1141 color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
1142 color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
1143 if (!XAllocColor(xw.dis, cmap, &color)) {
1144 dc.col[i] = white;
1145 fprintf(stderr, "Could not allocate color %d\n", i);
1146 } else
1147 dc.col[i] = color.pixel;
1148 i++;
1149 }
1150
1151 for(r = 0; r < 24; r++, i++) {
1152 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
1153 if (!XAllocColor(xw.dis, cmap, &color)) {
1154 dc.col[i] = white;
1155 fprintf(stderr, "Could not allocate color %d\n", i);
1156 } else
1157 dc.col[i] = color.pixel;
1158 }
1159 }
1160
1161 void
1162 xclear(int x1, int y1, int x2, int y2) {
1163 XSetForeground(xw.dis, dc.gc, dc.col[DefaultBG]);
1164 XFillRectangle(xw.dis, xw.buf, dc.gc,
1165 x1 * xw.cw, y1 * xw.ch,
1166 (x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch);
1167 }
1168
1169 void
1170 xhints(void)
1171 {
1172 XClassHint class = {TNAME, TNAME};
1173 XWMHints wm = {.flags = InputHint, .input = 1};
1174 XSizeHints size = {
1175 .flags = PSize | PResizeInc | PBaseSize,
1176 .height = xw.h,
1177 .width = xw.w,
1178 .height_inc = xw.ch,
1179 .width_inc = xw.cw,
1180 .base_height = 2*BORDER,
1181 .base_width = 2*BORDER,
1182 };
1183 XSetWMProperties(xw.dis, xw.win, NULL, NULL, NULL, 0, &size, &wm, &class);
1184 }
1185
1186 void
1187 xinit(void) {
1188 if(!(xw.dis = XOpenDisplay(NULL)))
1189 die("Can't open display\n");
1190 xw.scr = XDefaultScreen(xw.dis);
1191
1192 /* font */
1193 if(!(dc.font = XLoadQueryFont(xw.dis, FONT)) || !(dc.bfont = XLoadQueryFont(xw.dis, BOLDFONT)))
1194 die("Can't load font %s\n", dc.font ? BOLDFONT : FONT);
1195
1196 /* XXX: Assuming same size for bold font */
1197 xw.cw = dc.font->max_bounds.rbearing - dc.font->min_bounds.lbearing;
1198 xw.ch = dc.font->ascent + dc.font->descent;
1199
1200 /* colors */
1201 xloadcols();
1202
1203 /* windows */
1204 xw.h = term.row * xw.ch + 2*BORDER;
1205 xw.w = term.col * xw.cw + 2*BORDER;
1206 xw.win = XCreateSimpleWindow(xw.dis, XRootWindow(xw.dis, xw.scr), 0, 0,
1207 xw.w, xw.h, 0,
1208 dc.col[DefaultBG],
1209 dc.col[DefaultBG]);
1210 xw.bufw = xw.w - 2*BORDER;
1211 xw.bufh = xw.h - 2*BORDER;
1212 xw.buf = XCreatePixmap(xw.dis, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dis, xw.scr));
1213 /* gc */
1214 dc.gc = XCreateGC(xw.dis, xw.win, 0, NULL);
1215
1216 /* event mask */
1217 XSelectInput(xw.dis, xw.win, ExposureMask | KeyPressMask
1218 | StructureNotifyMask | FocusChangeMask | PointerMotionMask
1219 | ButtonPressMask | ButtonReleaseMask);
1220
1221 XMapWindow(xw.dis, xw.win);
1222 xhints();
1223 XStoreName(xw.dis, xw.win, "st");
1224 XSync(xw.dis, 0);
1225 }
1226
1227 void
1228 xdraws(char *s, Glyph base, int x, int y, int len) {
1229 unsigned long xfg, xbg;
1230 int winx = x*xw.cw, winy = y*xw.ch + dc.font->ascent, width = len*xw.cw;
1231 int i;
1232
1233 if(base.mode & ATTR_REVERSE)
1234 xfg = dc.col[base.bg], xbg = dc.col[base.fg];
1235 else
1236 xfg = dc.col[base.fg], xbg = dc.col[base.bg];
1237
1238 XSetBackground(xw.dis, dc.gc, xbg);
1239 XSetForeground(xw.dis, dc.gc, xfg);
1240
1241 if(base.mode & ATTR_GFX)
1242 for(i = 0; i < len; i++)
1243 s[i] = gfx[(int)s[i]];
1244
1245 XSetFont(xw.dis, dc.gc, base.mode & ATTR_BOLD ? dc.bfont->fid : dc.font->fid);
1246 XDrawImageString(xw.dis, xw.buf, dc.gc, winx, winy, s, len);
1247
1248 if(base.mode & ATTR_UNDERLINE)
1249 XDrawLine(xw.dis, xw.buf, dc.gc, winx, winy+1, winx+width-1, winy+1);
1250 }
1251
1252 void
1253 xdrawcursor(void) {
1254 static int oldx = 0;
1255 static int oldy = 0;
1256 Glyph g = {' ', ATTR_NULL, DefaultBG, DefaultCS, 0};
1257
1258 LIMIT(oldx, 0, term.col-1);
1259 LIMIT(oldy, 0, term.row-1);
1260
1261 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
1262 g.c = term.line[term.c.y][term.c.x].c;
1263
1264 /* remove the old cursor */
1265 if(term.line[oldy][oldx].state & GLYPH_SET)
1266 xdraws(&term.line[oldy][oldx].c, term.line[oldy][oldx], oldx, oldy, 1);
1267 else
1268 xclear(oldx, oldy, oldx, oldy);
1269
1270 /* draw the new one */
1271 if(!(term.c.state & CURSOR_HIDE) && xw.hasfocus) {
1272 xdraws(&g.c, g, term.c.x, term.c.y, 1);
1273 oldx = term.c.x, oldy = term.c.y;
1274 }
1275 }
1276
1277 #ifdef DEBUG
1278 /* basic drawing routines */
1279 void
1280 xdrawc(int x, int y, Glyph g) {
1281 XRectangle r = { x * xw.cw, y * xw.ch, xw.cw, xw.ch };
1282 XSetBackground(xw.dis, dc.gc, dc.col[g.bg]);
1283 XSetForeground(xw.dis, dc.gc, dc.col[g.fg]);
1284 XSetFont(xw.dis, dc.gc, g.mode & ATTR_BOLD ? dc.bfont->fid : dc.font->fid);
1285 XDrawImageString(xw.dis, xw.buf, dc.gc, r.x, r.y+dc.font->ascent, &g.c, 1);
1286 }
1287
1288 void
1289 draw(int dummy) {
1290 int x, y;
1291
1292 xclear(0, 0, term.col-1, term.row-1);
1293 for(y = 0; y < term.row; y++)
1294 for(x = 0; x < term.col; x++)
1295 if(term.line[y][x].state & GLYPH_SET)
1296 xdrawc(x, y, term.line[y][x]);
1297
1298 xdrawcursor();
1299 XCopyArea(xw.dis, xw.buf, xw.win, dc.gc, 0, 0, xw.bufw, xw.bufh, BORDER, BORDER);
1300 XFlush(xw.dis);
1301 }
1302
1303 #else
1304 /* optimized drawing routine */
1305 void
1306 draw(int redraw_all) {
1307 int i, x, y, ox;
1308 Glyph base, new;
1309 char buf[DRAW_BUF_SIZ];
1310
1311 XSetForeground(xw.dis, dc.gc, dc.col[DefaultBG]);
1312 XFillRectangle(xw.dis, xw.buf, dc.gc, 0, 0, xw.bufw, xw.bufh);
1313 for(y = 0; y < term.row; y++) {
1314 base = term.line[y][0];
1315 i = ox = 0;
1316 for(x = 0; x < term.col; x++) {
1317 new = term.line[y][x];
1318 if(sel.bx!=-1 && new.c && selected(x, y))
1319 new.mode ^= ATTR_REVERSE;
1320 if(i > 0 && (!(new.state & GLYPH_SET) || ATTRCMP(base, new) ||
1321 i >= DRAW_BUF_SIZ)) {
1322 xdraws(buf, base, ox, y, i);
1323 i = 0;
1324 }
1325 if(new.state & GLYPH_SET) {
1326 if(i == 0) {
1327 ox = x;
1328 base = new;
1329 }
1330 buf[i++] = new.c;
1331 }
1332 }
1333 if(i > 0)
1334 xdraws(buf, base, ox, y, i);
1335 }
1336 xdrawcursor();
1337 XCopyArea(xw.dis, xw.buf, xw.win, dc.gc, 0, 0, xw.bufw, xw.bufh, BORDER, BORDER);
1338 XFlush(xw.dis);
1339 }
1340
1341 #endif
1342
1343 void
1344 expose(XEvent *ev) {
1345 draw(SCREEN_REDRAW);
1346 }
1347
1348 void
1349 xseturgency(int add) {
1350 XWMHints *h = XGetWMHints(xw.dis, xw.win);
1351 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
1352 XSetWMHints(xw.dis, xw.win, h);
1353 XFree(h);
1354 }
1355
1356 void
1357 focus(XEvent *ev) {
1358 if((xw.hasfocus = ev->type == FocusIn))
1359 xseturgency(0);
1360 draw(SCREEN_UPDATE);
1361 }
1362
1363 char*
1364 kmap(KeySym k) {
1365 int i;
1366 for(i = 0; i < LEN(key); i++)
1367 if(key[i].k == k)
1368 return (char*)key[i].s;
1369 return NULL;
1370 }
1371
1372 void
1373 kpress(XEvent *ev) {
1374 XKeyEvent *e = &ev->xkey;
1375 KeySym ksym;
1376 char buf[32];
1377 char *customkey;
1378 int len;
1379 int meta;
1380 int shift;
1381
1382 meta = e->state & Mod1Mask;
1383 shift = e->state & ShiftMask;
1384 len = XLookupString(e, buf, sizeof(buf), &ksym, NULL);
1385
1386 if((customkey = kmap(ksym)))
1387 ttywrite(customkey, strlen(customkey));
1388 else if(len > 0) {
1389 buf[sizeof(buf)-1] = '\0';
1390 if(meta && len == 1)
1391 ttywrite("\033", 1);
1392 ttywrite(buf, len);
1393 } else
1394 switch(ksym) {
1395 case XK_Up:
1396 case XK_Down:
1397 case XK_Left:
1398 case XK_Right:
1399 sprintf(buf, "\033%c%c", IS_SET(MODE_APPKEYPAD) ? 'O' : '[', "DACB"[ksym - XK_Left]);
1400 ttywrite(buf, 3);
1401 break;
1402 case XK_Insert:
1403 if(shift)
1404 selpaste(), draw(1);
1405 break;
1406 default:
1407 fprintf(stderr, "errkey: %d\n", (int)ksym);
1408 break;
1409 }
1410 }
1411
1412 void
1413 resize(XEvent *e) {
1414 int col, row;
1415
1416 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
1417 return;
1418
1419 xw.w = e->xconfigure.width;
1420 xw.h = e->xconfigure.height;
1421 xw.bufw = xw.w - 2*BORDER;
1422 xw.bufh = xw.h - 2*BORDER;
1423 col = xw.bufw / xw.cw;
1424 row = xw.bufh / xw.ch;
1425 tresize(col, row);
1426 ttyresize(col, row);
1427 xw.bufh = MAX(1, xw.bufh);
1428 xw.bufw = MAX(1, xw.bufw);
1429 XFreePixmap(xw.dis, xw.buf);
1430 xw.buf = XCreatePixmap(xw.dis, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dis, xw.scr));
1431 draw(SCREEN_REDRAW);
1432 }
1433
1434 void
1435 run(void) {
1436 XEvent ev;
1437 fd_set rfd;
1438 int xfd = XConnectionNumber(xw.dis);
1439
1440 for(;;) {
1441 FD_ZERO(&rfd);
1442 FD_SET(cmdfd, &rfd);
1443 FD_SET(xfd, &rfd);
1444 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, NULL) < 0) {
1445 if(errno == EINTR)
1446 continue;
1447 die("select failed: %s\n", SERRNO);
1448 }
1449 if(FD_ISSET(cmdfd, &rfd)) {
1450 ttyread();
1451 draw(SCREEN_UPDATE);
1452 }
1453 while(XPending(xw.dis)) {
1454 XNextEvent(xw.dis, &ev);
1455 if(handler[ev.type])
1456 (handler[ev.type])(&ev);
1457 }
1458 }
1459 }
1460
1461 int
1462 main(int argc, char *argv[]) {
1463 if(argc == 2 && !strncmp("-v", argv[1], 3))
1464 die("st-" VERSION ", (c) 2010 st engineers\n");
1465 else if(argc != 1)
1466 die("usage: st [-v]\n");
1467 setlocale(LC_CTYPE, "");
1468 tnew(80, 24);
1469 ttynew();
1470 xinit();
1471 selinit();
1472 run();
1473 return 0;
1474 }