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1474c531dcb4ab9086b7bf718019b0d2527b15af
[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 = ((xw.w/xw.ch) * (sel.e[1]-sel.b[1]+2));
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;
258 ptr++;
259 }
260 }
261 if (ls) {
262 *ptr = '\n';
263 ptr++;
264 }
265 }
266 *ptr = 0;
267 return str;
268 }
269
270 /* TODO: use X11 clipboard */
271 static void selcopy(char *str) {
272 free(sel.clip);
273 sel.clip = str;
274 }
275
276 static void selpaste() {
277 if(sel.clip)
278 ttywrite(sel.clip, strlen(sel.clip));
279 }
280
281 /* TODO: doubleclick to select word */
282 static void brelease(XEvent *e) {
283 int b;
284 sel.mode = 0;
285 getbuttoninfo(e, &b, &sel.ex, &sel.ey);
286 if(b==4)
287 tscrollup(1);
288 else
289 if(b==5)
290 tscrolldown(1);
291 else
292 if(sel.bx==sel.ex && sel.by==sel.ey) {
293 sel.bx = -1;
294 if(b==2)
295 selpaste();
296 } else {
297 if(b==1)
298 selcopy(getseltext());
299 }
300 draw(1);
301 }
302
303 static void bmotion(XEvent *e) {
304 if (sel.mode) {
305 getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
306 draw(1);
307 }
308 }
309
310 #ifdef DEBUG
311 void
312 tdump(void) {
313 int row, col;
314 Glyph c;
315
316 for(row = 0; row < term.row; row++) {
317 for(col = 0; col < term.col; col++) {
318 if(col == term.c.x && row == term.c.y)
319 putchar('#');
320 else {
321 c = term.line[row][col];
322 putchar(c.state & GLYPH_SET ? c.c : '.');
323 }
324 }
325 putchar('\n');
326 }
327 }
328 #endif
329
330 void
331 die(const char *errstr, ...) {
332 va_list ap;
333
334 va_start(ap, errstr);
335 vfprintf(stderr, errstr, ap);
336 va_end(ap);
337 exit(EXIT_FAILURE);
338 }
339
340 void
341 execsh(void) {
342 char *args[3] = {getenv("SHELL"), "-i", NULL};
343 DEFAULT(args[0], SHELL); /* if getenv() failed */
344 putenv("TERM=" TNAME);
345 execvp(args[0], args);
346 }
347
348 void
349 sigchld(int a) {
350 int stat = 0;
351 if(waitpid(pid, &stat, 0) < 0)
352 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
353 if(WIFEXITED(stat))
354 exit(WEXITSTATUS(stat));
355 else
356 exit(EXIT_FAILURE);
357 }
358
359 void
360 ttynew(void) {
361 int m, s;
362
363 /* seems to work fine on linux, openbsd and freebsd */
364 struct winsize w = {term.row, term.col, 0, 0};
365 if(openpty(&m, &s, NULL, NULL, &w) < 0)
366 die("openpty failed: %s\n", SERRNO);
367
368 switch(pid = fork()) {
369 case -1:
370 die("fork failed\n");
371 break;
372 case 0:
373 setsid(); /* create a new process group */
374 dup2(s, STDIN_FILENO);
375 dup2(s, STDOUT_FILENO);
376 dup2(s, STDERR_FILENO);
377 if(ioctl(s, TIOCSCTTY, NULL) < 0)
378 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
379 close(s);
380 close(m);
381 execsh();
382 break;
383 default:
384 close(s);
385 cmdfd = m;
386 signal(SIGCHLD, sigchld);
387 }
388 }
389
390 void
391 dump(char c) {
392 static int col;
393 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
394 if(++col % 10 == 0)
395 fprintf(stderr, "\n");
396 }
397
398 void
399 ttyread(void) {
400 char buf[BUFSIZ] = {0};
401 int ret;
402
403 if((ret = read(cmdfd, buf, BUFSIZ)) < 0)
404 die("Couldn't read from shell: %s\n", SERRNO);
405 else
406 tputs(buf, ret);
407 }
408
409 void
410 ttywrite(const char *s, size_t n) {
411 if(write(cmdfd, s, n) == -1)
412 die("write error on tty: %s\n", SERRNO);
413 }
414
415 void
416 ttyresize(int x, int y) {
417 struct winsize w;
418
419 w.ws_row = term.row;
420 w.ws_col = term.col;
421 w.ws_xpixel = w.ws_ypixel = 0;
422 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
423 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
424 }
425
426 void
427 tcursor(int mode) {
428 static TCursor c;
429
430 if(mode == CURSOR_SAVE)
431 c = term.c;
432 else if(mode == CURSOR_LOAD)
433 term.c = c, tmoveto(c.x, c.y);
434 }
435
436 void
437 treset(void) {
438 term.c = (TCursor){{
439 .mode = ATTR_NULL,
440 .fg = DefaultFG,
441 .bg = DefaultBG
442 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
443
444 term.top = 0, term.bot = term.row - 1;
445 term.mode = MODE_WRAP;
446 tclearregion(0, 0, term.col-1, term.row-1);
447 }
448
449 void
450 tnew(int col, int row) {
451 /* set screen size */
452 term.row = row, term.col = col;
453 term.line = malloc(term.row * sizeof(Line));
454 term.alt = malloc(term.row * sizeof(Line));
455 for(row = 0 ; row < term.row; row++) {
456 term.line[row] = malloc(term.col * sizeof(Glyph));
457 term.alt [row] = malloc(term.col * sizeof(Glyph));
458 }
459 /* setup screen */
460 treset();
461 }
462
463 void
464 tswapscreen(void) {
465 Line* tmp = term.line;
466 term.line = term.alt;
467 term.alt = tmp;
468 term.mode ^= MODE_ALTSCREEN;
469 }
470
471 void
472 tscrolldown (int n) {
473 int i;
474 Line temp;
475
476 LIMIT(n, 0, term.bot-term.top+1);
477
478 for(i = 0; i < n; i++)
479 memset(term.line[term.bot-i], 0, term.col*sizeof(Glyph));
480
481 for(i = term.bot; i >= term.top+n; i--) {
482 temp = term.line[i];
483 term.line[i] = term.line[i-n];
484 term.line[i-n] = temp;
485 }
486 }
487
488 void
489 tscrollup (int n) {
490 int i;
491 Line temp;
492 LIMIT(n, 0, term.bot-term.top+1);
493
494 for(i = 0; i < n; i++)
495 memset(term.line[term.top+i], 0, term.col*sizeof(Glyph));
496
497 for(i = term.top; i <= term.bot-n; i++) {
498 temp = term.line[i];
499 term.line[i] = term.line[i+n];
500 term.line[i+n] = temp;
501 }
502 }
503
504 void
505 tnewline(void) {
506 int y = term.c.y + 1;
507 if(y > term.bot)
508 tscrollup(1), y = term.bot;
509 tmoveto(0, y);
510 }
511
512 void
513 csiparse(void) {
514 /* int noarg = 1; */
515 char *p = escseq.buf;
516
517 escseq.narg = 0;
518 if(*p == '?')
519 escseq.priv = 1, p++;
520
521 while(p < escseq.buf+escseq.len) {
522 while(isdigit(*p)) {
523 escseq.arg[escseq.narg] *= 10;
524 escseq.arg[escseq.narg] += *p++ - '0'/*, noarg = 0 */;
525 }
526 if(*p == ';' && escseq.narg+1 < ESC_ARG_SIZ)
527 escseq.narg++, p++;
528 else {
529 escseq.mode = *p;
530 escseq.narg++;
531 return;
532 }
533 }
534 }
535
536 void
537 tmoveto(int x, int y) {
538 LIMIT(x, 0, term.col-1);
539 LIMIT(y, 0, term.row-1);
540 term.c.state &= ~CURSOR_WRAPNEXT;
541 term.c.x = x;
542 term.c.y = y;
543 }
544
545 void
546 tsetchar(char c) {
547 term.line[term.c.y][term.c.x] = term.c.attr;
548 term.line[term.c.y][term.c.x].c = c;
549 term.line[term.c.y][term.c.x].state |= GLYPH_SET;
550 }
551
552 void
553 tclearregion(int x1, int y1, int x2, int y2) {
554 int y, temp;
555
556 if(x1 > x2)
557 temp = x1, x1 = x2, x2 = temp;
558 if(y1 > y2)
559 temp = y1, y1 = y2, y2 = temp;
560
561 LIMIT(x1, 0, term.col-1);
562 LIMIT(x2, 0, term.col-1);
563 LIMIT(y1, 0, term.row-1);
564 LIMIT(y2, 0, term.row-1);
565
566 for(y = y1; y <= y2; y++)
567 memset(&term.line[y][x1], 0, sizeof(Glyph)*(x2-x1+1));
568 }
569
570 void
571 tdeletechar(int n) {
572 int src = term.c.x + n;
573 int dst = term.c.x;
574 int size = term.col - src;
575
576 if(src >= term.col) {
577 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
578 return;
579 }
580 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
581 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
582 }
583
584 void
585 tinsertblank(int n) {
586 int src = term.c.x;
587 int dst = src + n;
588 int size = term.col - dst;
589
590 if(dst >= term.col) {
591 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
592 return;
593 }
594 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
595 tclearregion(src, term.c.y, dst - 1, term.c.y);
596 }
597
598 void
599 tinsertblankline(int n) {
600 int i;
601 Line blank;
602 int bot = term.bot;
603
604 if(term.c.y > term.bot)
605 bot = term.row - 1;
606 else if(term.c.y < term.top)
607 bot = term.top - 1;
608 if(term.c.y + n >= bot) {
609 tclearregion(0, term.c.y, term.col-1, bot);
610 return;
611 }
612 for(i = bot; i >= term.c.y+n; i--) {
613 /* swap deleted line <-> blanked line */
614 blank = term.line[i];
615 term.line[i] = term.line[i-n];
616 term.line[i-n] = blank;
617 /* blank it */
618 memset(blank, 0, term.col * sizeof(Glyph));
619 }
620 }
621
622 void
623 tdeleteline(int n) {
624 int i;
625 Line blank;
626 int bot = term.bot;
627
628 if(term.c.y > term.bot)
629 bot = term.row - 1;
630 else if(term.c.y < term.top)
631 bot = term.top - 1;
632 if(term.c.y + n >= bot) {
633 tclearregion(0, term.c.y, term.col-1, bot);
634 return;
635 }
636 for(i = term.c.y; i <= bot-n; i++) {
637 /* swap deleted line <-> blanked line */
638 blank = term.line[i];
639 term.line[i] = term.line[i+n];
640 term.line[i+n] = blank;
641 /* blank it */
642 memset(blank, 0, term.col * sizeof(Glyph));
643 }
644 }
645
646 void
647 tsetattr(int *attr, int l) {
648 int i;
649
650 for(i = 0; i < l; i++) {
651 switch(attr[i]) {
652 case 0:
653 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD);
654 term.c.attr.fg = DefaultFG;
655 term.c.attr.bg = DefaultBG;
656 break;
657 case 1:
658 term.c.attr.mode |= ATTR_BOLD;
659 break;
660 case 4:
661 term.c.attr.mode |= ATTR_UNDERLINE;
662 break;
663 case 7:
664 term.c.attr.mode |= ATTR_REVERSE;
665 break;
666 case 22:
667 term.c.attr.mode &= ~ATTR_BOLD;
668 break;
669 case 24:
670 term.c.attr.mode &= ~ATTR_UNDERLINE;
671 break;
672 case 27:
673 term.c.attr.mode &= ~ATTR_REVERSE;
674 break;
675 case 38:
676 if (i + 2 < l && attr[i + 1] == 5) {
677 i += 2;
678 if (BETWEEN(attr[i], 0, 255))
679 term.c.attr.fg = attr[i];
680 else
681 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[i]);
682 }
683 else
684 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
685 break;
686 case 39:
687 term.c.attr.fg = DefaultFG;
688 break;
689 case 48:
690 if (i + 2 < l && attr[i + 1] == 5) {
691 i += 2;
692 if (BETWEEN(attr[i], 0, 255))
693 term.c.attr.bg = attr[i];
694 else
695 fprintf(stderr, "erresc: bad bgcolor %d\n", attr[i]);
696 }
697 else
698 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
699 break;
700 case 49:
701 term.c.attr.bg = DefaultBG;
702 break;
703 default:
704 if(BETWEEN(attr[i], 30, 37))
705 term.c.attr.fg = attr[i] - 30;
706 else if(BETWEEN(attr[i], 40, 47))
707 term.c.attr.bg = attr[i] - 40;
708 else if(BETWEEN(attr[i], 90, 97))
709 term.c.attr.fg = attr[i] - 90 + 8;
710 else if(BETWEEN(attr[i], 100, 107))
711 term.c.attr.fg = attr[i] - 100 + 8;
712 else
713 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
714 break;
715 }
716 }
717 }
718
719 void
720 tsetscroll(int t, int b) {
721 int temp;
722
723 LIMIT(t, 0, term.row-1);
724 LIMIT(b, 0, term.row-1);
725 if(t > b) {
726 temp = t;
727 t = b;
728 b = temp;
729 }
730 term.top = t;
731 term.bot = b;
732 }
733
734 void
735 csihandle(void) {
736 switch(escseq.mode) {
737 default:
738 unknown:
739 printf("erresc: unknown csi ");
740 csidump();
741 /* die(""); */
742 break;
743 case '@': /* ICH -- Insert <n> blank char */
744 DEFAULT(escseq.arg[0], 1);
745 tinsertblank(escseq.arg[0]);
746 break;
747 case 'A': /* CUU -- Cursor <n> Up */
748 case 'e':
749 DEFAULT(escseq.arg[0], 1);
750 tmoveto(term.c.x, term.c.y-escseq.arg[0]);
751 break;
752 case 'B': /* CUD -- Cursor <n> Down */
753 DEFAULT(escseq.arg[0], 1);
754 tmoveto(term.c.x, term.c.y+escseq.arg[0]);
755 break;
756 case 'C': /* CUF -- Cursor <n> Forward */
757 case 'a':
758 DEFAULT(escseq.arg[0], 1);
759 tmoveto(term.c.x+escseq.arg[0], term.c.y);
760 break;
761 case 'D': /* CUB -- Cursor <n> Backward */
762 DEFAULT(escseq.arg[0], 1);
763 tmoveto(term.c.x-escseq.arg[0], term.c.y);
764 break;
765 case 'E': /* CNL -- Cursor <n> Down and first col */
766 DEFAULT(escseq.arg[0], 1);
767 tmoveto(0, term.c.y+escseq.arg[0]);
768 break;
769 case 'F': /* CPL -- Cursor <n> Up and first col */
770 DEFAULT(escseq.arg[0], 1);
771 tmoveto(0, term.c.y-escseq.arg[0]);
772 break;
773 case 'G': /* CHA -- Move to <col> */
774 case '`': /* XXX: HPA -- same? */
775 DEFAULT(escseq.arg[0], 1);
776 tmoveto(escseq.arg[0]-1, term.c.y);
777 break;
778 case 'H': /* CUP -- Move to <row> <col> */
779 case 'f': /* XXX: HVP -- same? */
780 DEFAULT(escseq.arg[0], 1);
781 DEFAULT(escseq.arg[1], 1);
782 tmoveto(escseq.arg[1]-1, escseq.arg[0]-1);
783 break;
784 /* XXX: (CSI n I) CHT -- Cursor Forward Tabulation <n> tab stops */
785 case 'J': /* ED -- Clear screen */
786 switch(escseq.arg[0]) {
787 case 0: /* below */
788 tclearregion(term.c.x, term.c.y, term.col-1, term.row-1);
789 break;
790 case 1: /* above */
791 tclearregion(0, 0, term.c.x, term.c.y);
792 break;
793 case 2: /* all */
794 tclearregion(0, 0, term.col-1, term.row-1);
795 break;
796 default:
797 goto unknown;
798 }
799 break;
800 case 'K': /* EL -- Clear line */
801 switch(escseq.arg[0]) {
802 case 0: /* right */
803 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
804 break;
805 case 1: /* left */
806 tclearregion(0, term.c.y, term.c.x, term.c.y);
807 break;
808 case 2: /* all */
809 tclearregion(0, term.c.y, term.col-1, term.c.y);
810 break;
811 }
812 break;
813 case 'S': /* SU -- Scroll <n> line up */
814 DEFAULT(escseq.arg[0], 1);
815 tscrollup(escseq.arg[0]);
816 break;
817 case 'T': /* SD -- Scroll <n> line down */
818 DEFAULT(escseq.arg[0], 1);
819 tscrolldown(escseq.arg[0]);
820 break;
821 case 'L': /* IL -- Insert <n> blank lines */
822 DEFAULT(escseq.arg[0], 1);
823 tinsertblankline(escseq.arg[0]);
824 break;
825 case 'l': /* RM -- Reset Mode */
826 if(escseq.priv) {
827 switch(escseq.arg[0]) {
828 case 1:
829 term.mode &= ~MODE_APPKEYPAD;
830 break;
831 case 7:
832 term.mode &= ~MODE_WRAP;
833 break;
834 case 12: /* att610 -- Stop blinking cursor (IGNORED) */
835 break;
836 case 25:
837 term.c.state |= CURSOR_HIDE;
838 break;
839 case 1049: /* = 1047 and 1048 */
840 case 1047:
841 if(IS_SET(MODE_ALTSCREEN)) {
842 tclearregion(0, 0, term.col-1, term.row-1);
843 tswapscreen();
844 }
845 if(escseq.arg[0] == 1047)
846 break;
847 case 1048:
848 tcursor(CURSOR_LOAD);
849 break;
850 default:
851 goto unknown;
852 }
853 } else {
854 switch(escseq.arg[0]) {
855 case 4:
856 term.mode &= ~MODE_INSERT;
857 break;
858 default:
859 goto unknown;
860 }
861 }
862 break;
863 case 'M': /* DL -- Delete <n> lines */
864 DEFAULT(escseq.arg[0], 1);
865 tdeleteline(escseq.arg[0]);
866 break;
867 case 'X': /* ECH -- Erase <n> char */
868 DEFAULT(escseq.arg[0], 1);
869 tclearregion(term.c.x, term.c.y, term.c.x + escseq.arg[0], term.c.y);
870 break;
871 case 'P': /* DCH -- Delete <n> char */
872 DEFAULT(escseq.arg[0], 1);
873 tdeletechar(escseq.arg[0]);
874 break;
875 /* XXX: (CSI n Z) CBT -- Cursor Backward Tabulation <n> tab stops */
876 case 'd': /* VPA -- Move to <row> */
877 DEFAULT(escseq.arg[0], 1);
878 tmoveto(term.c.x, escseq.arg[0]-1);
879 break;
880 case 'h': /* SM -- Set terminal mode */
881 if(escseq.priv) {
882 switch(escseq.arg[0]) {
883 case 1:
884 term.mode |= MODE_APPKEYPAD;
885 break;
886 case 7:
887 term.mode |= MODE_WRAP;
888 break;
889 case 12: /* att610 -- Start blinking cursor (IGNORED) */
890 break;
891 case 25:
892 term.c.state &= ~CURSOR_HIDE;
893 break;
894 case 1049: /* = 1047 and 1048 */
895 case 1047:
896 if(IS_SET(MODE_ALTSCREEN))
897 tclearregion(0, 0, term.col-1, term.row-1);
898 else
899 tswapscreen();
900 if(escseq.arg[0] == 1047)
901 break;
902 case 1048:
903 tcursor(CURSOR_SAVE);
904 break;
905 default: goto unknown;
906 }
907 } else {
908 switch(escseq.arg[0]) {
909 case 4:
910 term.mode |= MODE_INSERT;
911 break;
912 default: goto unknown;
913 }
914 };
915 break;
916 case 'm': /* SGR -- Terminal attribute (color) */
917 tsetattr(escseq.arg, escseq.narg);
918 break;
919 case 'r': /* DECSTBM -- Set Scrolling Region */
920 if(escseq.priv)
921 goto unknown;
922 else {
923 DEFAULT(escseq.arg[0], 1);
924 DEFAULT(escseq.arg[1], term.row);
925 tsetscroll(escseq.arg[0]-1, escseq.arg[1]-1);
926 tmoveto(0, 0);
927 }
928 break;
929 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
930 tcursor(CURSOR_SAVE);
931 break;
932 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
933 tcursor(CURSOR_LOAD);
934 break;
935 }
936 }
937
938 void
939 csidump(void) {
940 int i;
941 printf("ESC [ %s", escseq.priv ? "? " : "");
942 if(escseq.narg)
943 for(i = 0; i < escseq.narg; i++)
944 printf("%d ", escseq.arg[i]);
945 if(escseq.mode)
946 putchar(escseq.mode);
947 putchar('\n');
948 }
949
950 void
951 csireset(void) {
952 memset(&escseq, 0, sizeof(escseq));
953 }
954
955 void
956 tputtab(void) {
957 int space = TAB - term.c.x % TAB;
958 tmoveto(term.c.x + space, term.c.y);
959 }
960
961 void
962 tputc(char c) {
963 if(term.esc & ESC_START) {
964 if(term.esc & ESC_CSI) {
965 escseq.buf[escseq.len++] = c;
966 if(BETWEEN(c, 0x40, 0x7E) || escseq.len >= ESC_BUF_SIZ) {
967 term.esc = 0;
968 csiparse(), csihandle();
969 }
970 } else if(term.esc & ESC_OSC) {
971 if(c == ';') {
972 term.titlelen = 0;
973 term.esc = ESC_START | ESC_TITLE;
974 }
975 } else if(term.esc & ESC_TITLE) {
976 if(c == '\a' || term.titlelen+1 >= ESC_TITLE_SIZ) {
977 term.esc = 0;
978 term.title[term.titlelen] = '\0';
979 XStoreName(xw.dis, xw.win, term.title);
980 } else {
981 term.title[term.titlelen++] = c;
982 }
983 } else if(term.esc & ESC_ALTCHARSET) {
984 switch(c) {
985 case '0': /* Line drawing crap */
986 term.c.attr.mode |= ATTR_GFX;
987 break;
988 case 'B': /* Back to regular text */
989 term.c.attr.mode &= ~ATTR_GFX;
990 break;
991 default:
992 printf("esc unhandled charset: ESC ( %c\n", c);
993 }
994 term.esc = 0;
995 } else {
996 switch(c) {
997 case '[':
998 term.esc |= ESC_CSI;
999 break;
1000 case ']':
1001 term.esc |= ESC_OSC;
1002 break;
1003 case '(':
1004 term.esc |= ESC_ALTCHARSET;
1005 break;
1006 case 'D': /* IND -- Linefeed */
1007 if(term.c.y == term.bot)
1008 tscrollup(1);
1009 else
1010 tmoveto(term.c.x, term.c.y+1);
1011 term.esc = 0;
1012 break;
1013 case 'E': /* NEL -- Next line */
1014 tnewline();
1015 term.esc = 0;
1016 break;
1017 case 'M': /* RI -- Reverse index */
1018 if(term.c.y == term.top)
1019 tscrolldown(1);
1020 else
1021 tmoveto(term.c.x, term.c.y-1);
1022 term.esc = 0;
1023 break;
1024 case 'c': /* RIS -- Reset to inital state */
1025 treset();
1026 term.esc = 0;
1027 break;
1028 case '=': /* DECPAM -- Application keypad */
1029 term.mode |= MODE_APPKEYPAD;
1030 term.esc = 0;
1031 break;
1032 case '>': /* DECPNM -- Normal keypad */
1033 term.mode &= ~MODE_APPKEYPAD;
1034 term.esc = 0;
1035 break;
1036 case '7': /* DECSC -- Save Cursor */
1037 tcursor(CURSOR_SAVE);
1038 term.esc = 0;
1039 break;
1040 case '8': /* DECRC -- Restore Cursor */
1041 tcursor(CURSOR_LOAD);
1042 term.esc = 0;
1043 break;
1044 default:
1045 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n", c, isprint(c)?c:'.');
1046 term.esc = 0;
1047 }
1048 }
1049 } else {
1050 switch(c) {
1051 case '\t':
1052 tputtab();
1053 break;
1054 case '\b':
1055 tmoveto(term.c.x-1, term.c.y);
1056 break;
1057 case '\r':
1058 tmoveto(0, term.c.y);
1059 break;
1060 case '\n':
1061 tnewline();
1062 break;
1063 case '\a':
1064 if(!xw.hasfocus)
1065 xseturgency(1);
1066 break;
1067 case '\033':
1068 csireset();
1069 term.esc = ESC_START;
1070 break;
1071 default:
1072 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
1073 tnewline();
1074 tsetchar(c);
1075 if(term.c.x+1 < term.col)
1076 tmoveto(term.c.x+1, term.c.y);
1077 else
1078 term.c.state |= CURSOR_WRAPNEXT;
1079 break;
1080 }
1081 }
1082 }
1083
1084 void
1085 tputs(char *s, int len) {
1086 for(; len > 0; len--)
1087 tputc(*s++);
1088 }
1089
1090 void
1091 tresize(int col, int row) {
1092 int i;
1093 int minrow = MIN(row, term.row);
1094 int mincol = MIN(col, term.col);
1095
1096 if(col < 1 || row < 1)
1097 return;
1098
1099 /* free uneeded rows */
1100 for(i = row; i < term.row; i++) {
1101 free(term.line[i]);
1102 free(term.alt[i]);
1103 }
1104
1105 /* resize to new height */
1106 term.line = realloc(term.line, row * sizeof(Line));
1107 term.alt = realloc(term.alt, row * sizeof(Line));
1108
1109 /* resize each row to new width, zero-pad if needed */
1110 for(i = 0; i < minrow; i++) {
1111 term.line[i] = realloc(term.line[i], col * sizeof(Glyph));
1112 term.alt[i] = realloc(term.alt[i], col * sizeof(Glyph));
1113 memset(term.line[i] + mincol, 0, (col - mincol) * sizeof(Glyph));
1114 memset(term.alt[i] + mincol, 0, (col - mincol) * sizeof(Glyph));
1115 }
1116
1117 /* allocate any new rows */
1118 for(/* i == minrow */; i < row; i++) {
1119 term.line[i] = calloc(col, sizeof(Glyph));
1120 term.alt [i] = calloc(col, sizeof(Glyph));
1121 }
1122
1123 /* update terminal size */
1124 term.col = col, term.row = row;
1125 /* make use of the LIMIT in tmoveto */
1126 tmoveto(term.c.x, term.c.y);
1127 /* reset scrolling region */
1128 tsetscroll(0, row-1);
1129 }
1130
1131 void
1132 xloadcols(void) {
1133 int i, r, g, b;
1134 XColor color;
1135 Colormap cmap = DefaultColormap(xw.dis, xw.scr);
1136 unsigned long white = WhitePixel(xw.dis, xw.scr);
1137
1138 for(i = 0; i < 16; i++) {
1139 if (!XAllocNamedColor(xw.dis, cmap, colorname[i], &color, &color)) {
1140 dc.col[i] = white;
1141 fprintf(stderr, "Could not allocate color '%s'\n", colorname[i]);
1142 } else
1143 dc.col[i] = color.pixel;
1144 }
1145
1146 /* same colors as xterm */
1147 for(r = 0; r < 6; r++)
1148 for(g = 0; g < 6; g++)
1149 for(b = 0; b < 6; b++) {
1150 color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
1151 color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
1152 color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
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 i++;
1159 }
1160
1161 for(r = 0; r < 24; r++, i++) {
1162 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
1163 if (!XAllocColor(xw.dis, cmap, &color)) {
1164 dc.col[i] = white;
1165 fprintf(stderr, "Could not allocate color %d\n", i);
1166 } else
1167 dc.col[i] = color.pixel;
1168 }
1169 }
1170
1171 void
1172 xclear(int x1, int y1, int x2, int y2) {
1173 XSetForeground(xw.dis, dc.gc, dc.col[DefaultBG]);
1174 XFillRectangle(xw.dis, xw.buf, dc.gc,
1175 x1 * xw.cw, y1 * xw.ch,
1176 (x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch);
1177 }
1178
1179 void
1180 xhints(void)
1181 {
1182 XClassHint class = {TNAME, TNAME};
1183 XWMHints wm = {.flags = InputHint, .input = 1};
1184 XSizeHints size = {
1185 .flags = PSize | PResizeInc | PBaseSize,
1186 .height = xw.h,
1187 .width = xw.w,
1188 .height_inc = xw.ch,
1189 .width_inc = xw.cw,
1190 .base_height = 2*BORDER,
1191 .base_width = 2*BORDER,
1192 };
1193 XSetWMProperties(xw.dis, xw.win, NULL, NULL, NULL, 0, &size, &wm, &class);
1194 }
1195
1196 void
1197 xinit(void) {
1198 if(!(xw.dis = XOpenDisplay(NULL)))
1199 die("Can't open display\n");
1200 xw.scr = XDefaultScreen(xw.dis);
1201
1202 /* font */
1203 if(!(dc.font = XLoadQueryFont(xw.dis, FONT)) || !(dc.bfont = XLoadQueryFont(xw.dis, BOLDFONT)))
1204 die("Can't load font %s\n", dc.font ? BOLDFONT : FONT);
1205
1206 /* XXX: Assuming same size for bold font */
1207 xw.cw = dc.font->max_bounds.rbearing - dc.font->min_bounds.lbearing;
1208 xw.ch = dc.font->ascent + dc.font->descent;
1209
1210 /* colors */
1211 xloadcols();
1212
1213 /* windows */
1214 xw.h = term.row * xw.ch + 2*BORDER;
1215 xw.w = term.col * xw.cw + 2*BORDER;
1216 xw.win = XCreateSimpleWindow(xw.dis, XRootWindow(xw.dis, xw.scr), 0, 0,
1217 xw.w, xw.h, 0,
1218 dc.col[DefaultBG],
1219 dc.col[DefaultBG]);
1220 xw.bufw = xw.w - 2*BORDER;
1221 xw.bufh = xw.h - 2*BORDER;
1222 xw.buf = XCreatePixmap(xw.dis, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dis, xw.scr));
1223 /* gc */
1224 dc.gc = XCreateGC(xw.dis, xw.win, 0, NULL);
1225
1226 /* event mask */
1227 XSelectInput(xw.dis, xw.win, ExposureMask | KeyPressMask
1228 | StructureNotifyMask | FocusChangeMask | PointerMotionMask
1229 | ButtonPressMask | ButtonReleaseMask);
1230
1231 XMapWindow(xw.dis, xw.win);
1232 xhints();
1233 XStoreName(xw.dis, xw.win, "st");
1234 XSync(xw.dis, 0);
1235 }
1236
1237 void
1238 xdraws(char *s, Glyph base, int x, int y, int len) {
1239 unsigned long xfg, xbg;
1240 int winx = x*xw.cw, winy = y*xw.ch + dc.font->ascent, width = len*xw.cw;
1241 int i;
1242
1243 if(base.mode & ATTR_REVERSE)
1244 xfg = dc.col[base.bg], xbg = dc.col[base.fg];
1245 else
1246 xfg = dc.col[base.fg], xbg = dc.col[base.bg];
1247
1248 XSetBackground(xw.dis, dc.gc, xbg);
1249 XSetForeground(xw.dis, dc.gc, xfg);
1250
1251 if(base.mode & ATTR_GFX)
1252 for(i = 0; i < len; i++)
1253 s[i] = gfx[(int)s[i]];
1254
1255 XSetFont(xw.dis, dc.gc, base.mode & ATTR_BOLD ? dc.bfont->fid : dc.font->fid);
1256 XDrawImageString(xw.dis, xw.buf, dc.gc, winx, winy, s, len);
1257
1258 if(base.mode & ATTR_UNDERLINE)
1259 XDrawLine(xw.dis, xw.buf, dc.gc, winx, winy+1, winx+width-1, winy+1);
1260 }
1261
1262 void
1263 xdrawcursor(void) {
1264 static int oldx = 0;
1265 static int oldy = 0;
1266 Glyph g = {' ', ATTR_NULL, DefaultBG, DefaultCS, 0};
1267
1268 LIMIT(oldx, 0, term.col-1);
1269 LIMIT(oldy, 0, term.row-1);
1270
1271 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
1272 g.c = term.line[term.c.y][term.c.x].c;
1273
1274 /* remove the old cursor */
1275 if(term.line[oldy][oldx].state & GLYPH_SET)
1276 xdraws(&term.line[oldy][oldx].c, term.line[oldy][oldx], oldx, oldy, 1);
1277 else
1278 xclear(oldx, oldy, oldx, oldy);
1279
1280 /* draw the new one */
1281 if(!(term.c.state & CURSOR_HIDE) && xw.hasfocus) {
1282 xdraws(&g.c, g, term.c.x, term.c.y, 1);
1283 oldx = term.c.x, oldy = term.c.y;
1284 }
1285 }
1286
1287 #ifdef DEBUG
1288 /* basic drawing routines */
1289 void
1290 xdrawc(int x, int y, Glyph g) {
1291 XRectangle r = { x * xw.cw, y * xw.ch, xw.cw, xw.ch };
1292 XSetBackground(xw.dis, dc.gc, dc.col[g.bg]);
1293 XSetForeground(xw.dis, dc.gc, dc.col[g.fg]);
1294 XSetFont(xw.dis, dc.gc, g.mode & ATTR_BOLD ? dc.bfont->fid : dc.font->fid);
1295 XDrawImageString(xw.dis, xw.buf, dc.gc, r.x, r.y+dc.font->ascent, &g.c, 1);
1296 }
1297
1298 void
1299 draw(int dummy) {
1300 int x, y;
1301
1302 xclear(0, 0, term.col-1, term.row-1);
1303 for(y = 0; y < term.row; y++)
1304 for(x = 0; x < term.col; x++)
1305 if(term.line[y][x].state & GLYPH_SET)
1306 xdrawc(x, y, term.line[y][x]);
1307
1308 xdrawcursor();
1309 XCopyArea(xw.dis, xw.buf, xw.win, dc.gc, 0, 0, xw.bufw, xw.bufh, BORDER, BORDER);
1310 XFlush(xw.dis);
1311 }
1312
1313 #else
1314 /* optimized drawing routine */
1315 void
1316 draw(int redraw_all) {
1317 int i, x, y, ox;
1318 Glyph base, new;
1319 char buf[DRAW_BUF_SIZ];
1320
1321 XSetForeground(xw.dis, dc.gc, dc.col[DefaultBG]);
1322 XFillRectangle(xw.dis, xw.buf, dc.gc, 0, 0, xw.bufw, xw.bufh);
1323 for(y = 0; y < term.row; y++) {
1324 base = term.line[y][0];
1325 i = ox = 0;
1326 for(x = 0; x < term.col; x++) {
1327 new = term.line[y][x];
1328 if(sel.bx!=-1 && new.c && selected(x, y))
1329 new.mode ^= ATTR_REVERSE;
1330 if(i > 0 && (!(new.state & GLYPH_SET) || ATTRCMP(base, new) ||
1331 i >= DRAW_BUF_SIZ)) {
1332 xdraws(buf, base, ox, y, i);
1333 i = 0;
1334 }
1335 if(new.state & GLYPH_SET) {
1336 if(i == 0) {
1337 ox = x;
1338 base = new;
1339 }
1340 buf[i++] = new.c;
1341 }
1342 }
1343 if(i > 0)
1344 xdraws(buf, base, ox, y, i);
1345 }
1346 xdrawcursor();
1347 XCopyArea(xw.dis, xw.buf, xw.win, dc.gc, 0, 0, xw.bufw, xw.bufh, BORDER, BORDER);
1348 XFlush(xw.dis);
1349 }
1350
1351 #endif
1352
1353 void
1354 expose(XEvent *ev) {
1355 draw(SCREEN_REDRAW);
1356 }
1357
1358 void
1359 xseturgency(int add) {
1360 XWMHints *h = XGetWMHints(xw.dis, xw.win);
1361 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
1362 XSetWMHints(xw.dis, xw.win, h);
1363 XFree(h);
1364 }
1365
1366 void
1367 focus(XEvent *ev) {
1368 if((xw.hasfocus = ev->type == FocusIn))
1369 xseturgency(0);
1370 draw(SCREEN_UPDATE);
1371 }
1372
1373 char*
1374 kmap(KeySym k) {
1375 int i;
1376 for(i = 0; i < LEN(key); i++)
1377 if(key[i].k == k)
1378 return (char*)key[i].s;
1379 return NULL;
1380 }
1381
1382 void
1383 kpress(XEvent *ev) {
1384 XKeyEvent *e = &ev->xkey;
1385 KeySym ksym;
1386 char buf[32];
1387 char *customkey;
1388 int len;
1389 int meta;
1390 int shift;
1391
1392 meta = e->state & Mod1Mask;
1393 shift = e->state & ShiftMask;
1394 len = XLookupString(e, buf, sizeof(buf), &ksym, NULL);
1395
1396 if((customkey = kmap(ksym)))
1397 ttywrite(customkey, strlen(customkey));
1398 else if(len > 0) {
1399 buf[sizeof(buf)-1] = '\0';
1400 if(meta && len == 1)
1401 ttywrite("\033", 1);
1402 ttywrite(buf, len);
1403 } else
1404 switch(ksym) {
1405 case XK_Up:
1406 case XK_Down:
1407 case XK_Left:
1408 case XK_Right:
1409 sprintf(buf, "\033%c%c", IS_SET(MODE_APPKEYPAD) ? 'O' : '[', "DACB"[ksym - XK_Left]);
1410 ttywrite(buf, 3);
1411 break;
1412 case XK_Insert:
1413 if(shift)
1414 draw(1), puts("draw!")/* XXX: paste X clipboard */;
1415 break;
1416 default:
1417 fprintf(stderr, "errkey: %d\n", (int)ksym);
1418 break;
1419 }
1420 }
1421
1422 void
1423 resize(XEvent *e) {
1424 int col, row;
1425
1426 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
1427 return;
1428
1429 xw.w = e->xconfigure.width;
1430 xw.h = e->xconfigure.height;
1431 xw.bufw = xw.w - 2*BORDER;
1432 xw.bufh = xw.h - 2*BORDER;
1433 col = xw.bufw / xw.cw;
1434 row = xw.bufh / xw.ch;
1435 tresize(col, row);
1436 ttyresize(col, row);
1437 xw.bufh = MAX(1, xw.bufh);
1438 xw.bufw = MAX(1, xw.bufw);
1439 XFreePixmap(xw.dis, xw.buf);
1440 xw.buf = XCreatePixmap(xw.dis, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dis, xw.scr));
1441 draw(SCREEN_REDRAW);
1442 }
1443
1444 void
1445 run(void) {
1446 XEvent ev;
1447 fd_set rfd;
1448 int xfd = XConnectionNumber(xw.dis);
1449
1450 for(;;) {
1451 FD_ZERO(&rfd);
1452 FD_SET(cmdfd, &rfd);
1453 FD_SET(xfd, &rfd);
1454 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, NULL) < 0) {
1455 if(errno == EINTR)
1456 continue;
1457 die("select failed: %s\n", SERRNO);
1458 }
1459 if(FD_ISSET(cmdfd, &rfd)) {
1460 ttyread();
1461 draw(SCREEN_UPDATE);
1462 }
1463 while(XPending(xw.dis)) {
1464 XNextEvent(xw.dis, &ev);
1465 if(handler[ev.type])
1466 (handler[ev.type])(&ev);
1467 }
1468 }
1469 }
1470
1471 int
1472 main(int argc, char *argv[]) {
1473 if(argc == 2 && !strncmp("-v", argv[1], 3))
1474 die("st-" VERSION ", (c) 2010 st engineers\n");
1475 else if(argc != 1)
1476 die("usage: st [-v]\n");
1477 setlocale(LC_CTYPE, "");
1478 tnew(80, 24);
1479 ttynew();
1480 xinit();
1481 selinit();
1482 run();
1483 return 0;
1484 }