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