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4a898767fecc3d1f2dde3480402e98b505111289
[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 /* TODO: use X11 clipboard */
214
215 static inline int selected(int x, int y) {
216 if ((sel.ey==y && sel.by==y)) {
217 int bx = MIN(sel.bx, sel.ex);
218 int ex = MAX(sel.bx, sel.ex);
219 return (x>=bx && x<=ex);
220 }
221 return (((y>sel.b[1] && y<sel.e[1]) || (y==sel.e[1] && x<=sel.e[0])) || \
222 (y==sel.b[1] && x>=sel.b[0] && (x<=sel.e[0] || sel.b[1]!=sel.e[1])));
223 }
224
225 static void getbuttoninfo(XEvent *e, int *b, int *x, int *y) {
226 if(b) *b = e->xbutton.state,
227 *b=*b==4096?5:*b==2048?4:*b==1024?3:*b==512?2:*b==256?1:-1;
228 *x = e->xbutton.x/xw.cw;
229 *y = e->xbutton.y/xw.ch;
230 sel.b[0] = sel.by<sel.ey?sel.bx:sel.ex;
231 sel.b[1] = MIN(sel.by, sel.ey);
232 sel.e[0] = sel.by<sel.ey?sel.ex:sel.bx;
233 sel.e[1] = MAX(sel.by, sel.ey);
234 }
235
236 static void bpress(XEvent *e) {
237 sel.mode = 1;
238 sel.ex = sel.bx = e->xbutton.x/xw.cw;
239 sel.ey = sel.by = e->xbutton.y/xw.ch;
240 }
241
242 static char *getseltext() {
243 char *str, *ptr;
244 int ls, x, y, sz;
245 if(sel.bx==-1)
246 return NULL;
247 sz = ((xw.w/xw.ch) * (sel.e[1]-sel.b[1]+2));
248 ptr = str = malloc (sz);
249 for(y = 0; y < term.row; y++) {
250 for(x = 0; x < term.col; x++) {
251 if(term.line[y][x].state & GLYPH_SET && (ls=selected(x, y))) {
252 *ptr = term.line[y][x].c;
253 ptr++;
254 }
255 }
256 if (ls) {
257 *ptr = '\n';
258 ptr++;
259 }
260 }
261 *ptr = 0;
262 return str;
263 }
264
265 static void clipboard_copy(char *str) {
266 free(sel.clip);
267 sel.clip = str;
268 }
269
270 static void clipboard_paste() {
271 if(sel.clip)
272 ttywrite(sel.clip, strlen(sel.clip));
273 }
274
275 // TODO: doubleclick to select word
276 static void brelease(XEvent *e) {
277 int b;
278 sel.mode = 0;
279 getbuttoninfo(e, &b, &sel.ex, &sel.ey);
280 if(b==4)
281 tscrollup(1);
282 else
283 if(b==5)
284 tscrolldown(1);
285 else
286 if(sel.bx==sel.ex && sel.by==sel.ey) {
287 sel.bx = -1;
288 if(b==2)
289 clipboard_paste();
290 } else {
291 if(b==1)
292 clipboard_copy(getseltext());
293 }
294 draw(1);
295 }
296
297 static void bmotion(XEvent *e) {
298 if (sel.mode) {
299 getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
300 draw(1);
301 }
302 }
303
304 #ifdef DEBUG
305 void
306 tdump(void) {
307 int row, col;
308 Glyph c;
309
310 for(row = 0; row < term.row; row++) {
311 for(col = 0; col < term.col; col++) {
312 if(col == term.c.x && row == term.c.y)
313 putchar('#');
314 else {
315 c = term.line[row][col];
316 putchar(c.state & GLYPH_SET ? c.c : '.');
317 }
318 }
319 putchar('\n');
320 }
321 }
322 #endif
323
324 void
325 die(const char *errstr, ...) {
326 va_list ap;
327
328 va_start(ap, errstr);
329 vfprintf(stderr, errstr, ap);
330 va_end(ap);
331 exit(EXIT_FAILURE);
332 }
333
334 void
335 execsh(void) {
336 char *args[3] = {getenv("SHELL"), "-i", NULL};
337 DEFAULT(args[0], SHELL); /* if getenv() failed */
338 putenv("TERM=" TNAME);
339 execvp(args[0], args);
340 }
341
342 void
343 sigchld(int a) {
344 int stat = 0;
345 if(waitpid(pid, &stat, 0) < 0)
346 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
347 if(WIFEXITED(stat))
348 exit(WEXITSTATUS(stat));
349 else
350 exit(EXIT_FAILURE);
351 }
352
353 void
354 ttynew(void) {
355 int m, s;
356
357 /* seems to work fine on linux, openbsd and freebsd */
358 struct winsize w = {term.row, term.col, 0, 0};
359 if(openpty(&m, &s, NULL, NULL, &w) < 0)
360 die("openpty failed: %s\n", SERRNO);
361
362 switch(pid = fork()) {
363 case -1:
364 die("fork failed\n");
365 break;
366 case 0:
367 setsid(); /* create a new process group */
368 dup2(s, STDIN_FILENO);
369 dup2(s, STDOUT_FILENO);
370 dup2(s, STDERR_FILENO);
371 if(ioctl(s, TIOCSCTTY, NULL) < 0)
372 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
373 close(s);
374 close(m);
375 execsh();
376 break;
377 default:
378 close(s);
379 cmdfd = m;
380 signal(SIGCHLD, sigchld);
381 }
382 }
383
384 void
385 dump(char c) {
386 static int col;
387 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
388 if(++col % 10 == 0)
389 fprintf(stderr, "\n");
390 }
391
392 void
393 ttyread(void) {
394 char buf[BUFSIZ] = {0};
395 int ret;
396
397 if((ret = read(cmdfd, buf, BUFSIZ)) < 0)
398 die("Couldn't read from shell: %s\n", SERRNO);
399 else
400 tputs(buf, ret);
401 }
402
403 void
404 ttywrite(const char *s, size_t n) {
405 if(write(cmdfd, s, n) == -1)
406 die("write error on tty: %s\n", SERRNO);
407 }
408
409 void
410 ttyresize(int x, int y) {
411 struct winsize w;
412
413 w.ws_row = term.row;
414 w.ws_col = term.col;
415 w.ws_xpixel = w.ws_ypixel = 0;
416 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
417 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
418 }
419
420 void
421 tcursor(int mode) {
422 static TCursor c;
423
424 if(mode == CURSOR_SAVE)
425 c = term.c;
426 else if(mode == CURSOR_LOAD)
427 term.c = c, tmoveto(c.x, c.y);
428 }
429
430 void
431 treset(void) {
432 term.c = (TCursor){{
433 .mode = ATTR_NULL,
434 .fg = DefaultFG,
435 .bg = DefaultBG
436 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
437
438 term.top = 0, term.bot = term.row - 1;
439 term.mode = MODE_WRAP;
440 tclearregion(0, 0, term.col-1, term.row-1);
441 }
442
443 void
444 tnew(int col, int row) {
445 /* set screen size */
446 term.row = row, term.col = col;
447 term.line = malloc(term.row * sizeof(Line));
448 term.alt = malloc(term.row * sizeof(Line));
449 for(row = 0 ; row < term.row; row++) {
450 term.line[row] = malloc(term.col * sizeof(Glyph));
451 term.alt [row] = malloc(term.col * sizeof(Glyph));
452 }
453 /* setup screen */
454 treset();
455 }
456
457 void
458 tswapscreen(void) {
459 Line* tmp = term.line;
460 term.line = term.alt;
461 term.alt = tmp;
462 term.mode ^= MODE_ALTSCREEN;
463 }
464
465 void
466 tscrolldown (int n) {
467 int i;
468 Line temp;
469
470 LIMIT(n, 0, term.bot-term.top+1);
471
472 for(i = 0; i < n; i++)
473 memset(term.line[term.bot-i], 0, term.col*sizeof(Glyph));
474
475 for(i = term.bot; i >= term.top+n; i--) {
476 temp = term.line[i];
477 term.line[i] = term.line[i-n];
478 term.line[i-n] = temp;
479 }
480 }
481
482 void
483 tscrollup (int n) {
484 int i;
485 Line temp;
486 LIMIT(n, 0, term.bot-term.top+1);
487
488 for(i = 0; i < n; i++)
489 memset(term.line[term.top+i], 0, term.col*sizeof(Glyph));
490
491 for(i = term.top; i <= term.bot-n; i++) {
492 temp = term.line[i];
493 term.line[i] = term.line[i+n];
494 term.line[i+n] = temp;
495 }
496 }
497
498 void
499 tnewline(void) {
500 int y = term.c.y + 1;
501 if(y > term.bot)
502 tscrollup(1), y = term.bot;
503 tmoveto(0, y);
504 }
505
506 void
507 csiparse(void) {
508 /* int noarg = 1; */
509 char *p = escseq.buf;
510
511 escseq.narg = 0;
512 if(*p == '?')
513 escseq.priv = 1, p++;
514
515 while(p < escseq.buf+escseq.len) {
516 while(isdigit(*p)) {
517 escseq.arg[escseq.narg] *= 10;
518 escseq.arg[escseq.narg] += *p++ - '0'/*, noarg = 0 */;
519 }
520 if(*p == ';' && escseq.narg+1 < ESC_ARG_SIZ)
521 escseq.narg++, p++;
522 else {
523 escseq.mode = *p;
524 escseq.narg++;
525 return;
526 }
527 }
528 }
529
530 void
531 tmoveto(int x, int y) {
532 LIMIT(x, 0, term.col-1);
533 LIMIT(y, 0, term.row-1);
534 term.c.state &= ~CURSOR_WRAPNEXT;
535 term.c.x = x;
536 term.c.y = y;
537 }
538
539 void
540 tsetchar(char c) {
541 term.line[term.c.y][term.c.x] = term.c.attr;
542 term.line[term.c.y][term.c.x].c = c;
543 term.line[term.c.y][term.c.x].state |= GLYPH_SET;
544 }
545
546 void
547 tclearregion(int x1, int y1, int x2, int y2) {
548 int y, temp;
549
550 if(x1 > x2)
551 temp = x1, x1 = x2, x2 = temp;
552 if(y1 > y2)
553 temp = y1, y1 = y2, y2 = temp;
554
555 LIMIT(x1, 0, term.col-1);
556 LIMIT(x2, 0, term.col-1);
557 LIMIT(y1, 0, term.row-1);
558 LIMIT(y2, 0, term.row-1);
559
560 for(y = y1; y <= y2; y++)
561 memset(&term.line[y][x1], 0, sizeof(Glyph)*(x2-x1+1));
562 }
563
564 void
565 tdeletechar(int n) {
566 int src = term.c.x + n;
567 int dst = term.c.x;
568 int size = term.col - src;
569
570 if(src >= term.col) {
571 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
572 return;
573 }
574 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
575 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
576 }
577
578 void
579 tinsertblank(int n) {
580 int src = term.c.x;
581 int dst = src + n;
582 int size = term.col - dst;
583
584 if(dst >= term.col) {
585 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
586 return;
587 }
588 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
589 tclearregion(src, term.c.y, dst - 1, term.c.y);
590 }
591
592 void
593 tinsertblankline(int n) {
594 int i;
595 Line blank;
596 int bot = term.bot;
597
598 if(term.c.y > term.bot)
599 bot = term.row - 1;
600 else if(term.c.y < term.top)
601 bot = term.top - 1;
602 if(term.c.y + n >= bot) {
603 tclearregion(0, term.c.y, term.col-1, bot);
604 return;
605 }
606 for(i = bot; i >= term.c.y+n; i--) {
607 /* swap deleted line <-> blanked line */
608 blank = term.line[i];
609 term.line[i] = term.line[i-n];
610 term.line[i-n] = blank;
611 /* blank it */
612 memset(blank, 0, term.col * sizeof(Glyph));
613 }
614 }
615
616 void
617 tdeleteline(int n) {
618 int i;
619 Line blank;
620 int bot = term.bot;
621
622 if(term.c.y > term.bot)
623 bot = term.row - 1;
624 else if(term.c.y < term.top)
625 bot = term.top - 1;
626 if(term.c.y + n >= bot) {
627 tclearregion(0, term.c.y, term.col-1, bot);
628 return;
629 }
630 for(i = term.c.y; i <= bot-n; i++) {
631 /* swap deleted line <-> blanked line */
632 blank = term.line[i];
633 term.line[i] = term.line[i+n];
634 term.line[i+n] = blank;
635 /* blank it */
636 memset(blank, 0, term.col * sizeof(Glyph));
637 }
638 }
639
640 void
641 tsetattr(int *attr, int l) {
642 int i;
643
644 for(i = 0; i < l; i++) {
645 switch(attr[i]) {
646 case 0:
647 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD);
648 term.c.attr.fg = DefaultFG;
649 term.c.attr.bg = DefaultBG;
650 break;
651 case 1:
652 term.c.attr.mode |= ATTR_BOLD;
653 break;
654 case 4:
655 term.c.attr.mode |= ATTR_UNDERLINE;
656 break;
657 case 7:
658 term.c.attr.mode |= ATTR_REVERSE;
659 break;
660 case 22:
661 term.c.attr.mode &= ~ATTR_BOLD;
662 break;
663 case 24:
664 term.c.attr.mode &= ~ATTR_UNDERLINE;
665 break;
666 case 27:
667 term.c.attr.mode &= ~ATTR_REVERSE;
668 break;
669 case 38:
670 if (i + 2 < l && attr[i + 1] == 5) {
671 i += 2;
672 if (BETWEEN(attr[i], 0, 255))
673 term.c.attr.fg = attr[i];
674 else
675 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[i]);
676 }
677 else
678 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
679 break;
680 case 39:
681 term.c.attr.fg = DefaultFG;
682 break;
683 case 48:
684 if (i + 2 < l && attr[i + 1] == 5) {
685 i += 2;
686 if (BETWEEN(attr[i], 0, 255))
687 term.c.attr.bg = attr[i];
688 else
689 fprintf(stderr, "erresc: bad bgcolor %d\n", attr[i]);
690 }
691 else
692 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
693 break;
694 case 49:
695 term.c.attr.bg = DefaultBG;
696 break;
697 default:
698 if(BETWEEN(attr[i], 30, 37))
699 term.c.attr.fg = attr[i] - 30;
700 else if(BETWEEN(attr[i], 40, 47))
701 term.c.attr.bg = attr[i] - 40;
702 else if(BETWEEN(attr[i], 90, 97))
703 term.c.attr.fg = attr[i] - 90 + 8;
704 else if(BETWEEN(attr[i], 100, 107))
705 term.c.attr.fg = attr[i] - 100 + 8;
706 else
707 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
708 break;
709 }
710 }
711 }
712
713 void
714 tsetscroll(int t, int b) {
715 int temp;
716
717 LIMIT(t, 0, term.row-1);
718 LIMIT(b, 0, term.row-1);
719 if(t > b) {
720 temp = t;
721 t = b;
722 b = temp;
723 }
724 term.top = t;
725 term.bot = b;
726 }
727
728 void
729 csihandle(void) {
730 switch(escseq.mode) {
731 default:
732 unknown:
733 printf("erresc: unknown csi ");
734 csidump();
735 /* die(""); */
736 break;
737 case '@': /* ICH -- Insert <n> blank char */
738 DEFAULT(escseq.arg[0], 1);
739 tinsertblank(escseq.arg[0]);
740 break;
741 case 'A': /* CUU -- Cursor <n> Up */
742 case 'e':
743 DEFAULT(escseq.arg[0], 1);
744 tmoveto(term.c.x, term.c.y-escseq.arg[0]);
745 break;
746 case 'B': /* CUD -- Cursor <n> Down */
747 DEFAULT(escseq.arg[0], 1);
748 tmoveto(term.c.x, term.c.y+escseq.arg[0]);
749 break;
750 case 'C': /* CUF -- Cursor <n> Forward */
751 case 'a':
752 DEFAULT(escseq.arg[0], 1);
753 tmoveto(term.c.x+escseq.arg[0], term.c.y);
754 break;
755 case 'D': /* CUB -- Cursor <n> Backward */
756 DEFAULT(escseq.arg[0], 1);
757 tmoveto(term.c.x-escseq.arg[0], term.c.y);
758 break;
759 case 'E': /* CNL -- Cursor <n> Down and first col */
760 DEFAULT(escseq.arg[0], 1);
761 tmoveto(0, term.c.y+escseq.arg[0]);
762 break;
763 case 'F': /* CPL -- Cursor <n> Up and first col */
764 DEFAULT(escseq.arg[0], 1);
765 tmoveto(0, term.c.y-escseq.arg[0]);
766 break;
767 case 'G': /* CHA -- Move to <col> */
768 case '`': /* XXX: HPA -- same? */
769 DEFAULT(escseq.arg[0], 1);
770 tmoveto(escseq.arg[0]-1, term.c.y);
771 break;
772 case 'H': /* CUP -- Move to <row> <col> */
773 case 'f': /* XXX: HVP -- same? */
774 DEFAULT(escseq.arg[0], 1);
775 DEFAULT(escseq.arg[1], 1);
776 tmoveto(escseq.arg[1]-1, escseq.arg[0]-1);
777 break;
778 /* XXX: (CSI n I) CHT -- Cursor Forward Tabulation <n> tab stops */
779 case 'J': /* ED -- Clear screen */
780 switch(escseq.arg[0]) {
781 case 0: /* below */
782 tclearregion(term.c.x, term.c.y, term.col-1, term.row-1);
783 break;
784 case 1: /* above */
785 tclearregion(0, 0, term.c.x, term.c.y);
786 break;
787 case 2: /* all */
788 tclearregion(0, 0, term.col-1, term.row-1);
789 break;
790 default:
791 goto unknown;
792 }
793 break;
794 case 'K': /* EL -- Clear line */
795 switch(escseq.arg[0]) {
796 case 0: /* right */
797 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
798 break;
799 case 1: /* left */
800 tclearregion(0, term.c.y, term.c.x, term.c.y);
801 break;
802 case 2: /* all */
803 tclearregion(0, term.c.y, term.col-1, term.c.y);
804 break;
805 }
806 break;
807 case 'S': /* SU -- Scroll <n> line up */
808 DEFAULT(escseq.arg[0], 1);
809 tscrollup(escseq.arg[0]);
810 break;
811 case 'T': /* SD -- Scroll <n> line down */
812 DEFAULT(escseq.arg[0], 1);
813 tscrolldown(escseq.arg[0]);
814 break;
815 case 'L': /* IL -- Insert <n> blank lines */
816 DEFAULT(escseq.arg[0], 1);
817 tinsertblankline(escseq.arg[0]);
818 break;
819 case 'l': /* RM -- Reset Mode */
820 if(escseq.priv) {
821 switch(escseq.arg[0]) {
822 case 1:
823 term.mode &= ~MODE_APPKEYPAD;
824 break;
825 case 7:
826 term.mode &= ~MODE_WRAP;
827 break;
828 case 12: /* att610 -- Stop blinking cursor (IGNORED) */
829 break;
830 case 25:
831 term.c.state |= CURSOR_HIDE;
832 break;
833 case 1049: /* = 1047 and 1048 */
834 case 1047:
835 if(IS_SET(MODE_ALTSCREEN)) {
836 tclearregion(0, 0, term.col-1, term.row-1);
837 tswapscreen();
838 }
839 if(escseq.arg[0] == 1047)
840 break;
841 case 1048:
842 tcursor(CURSOR_LOAD);
843 break;
844 default:
845 goto unknown;
846 }
847 } else {
848 switch(escseq.arg[0]) {
849 case 4:
850 term.mode &= ~MODE_INSERT;
851 break;
852 default:
853 goto unknown;
854 }
855 }
856 break;
857 case 'M': /* DL -- Delete <n> lines */
858 DEFAULT(escseq.arg[0], 1);
859 tdeleteline(escseq.arg[0]);
860 break;
861 case 'X': /* ECH -- Erase <n> char */
862 DEFAULT(escseq.arg[0], 1);
863 tclearregion(term.c.x, term.c.y, term.c.x + escseq.arg[0], term.c.y);
864 break;
865 case 'P': /* DCH -- Delete <n> char */
866 DEFAULT(escseq.arg[0], 1);
867 tdeletechar(escseq.arg[0]);
868 break;
869 /* XXX: (CSI n Z) CBT -- Cursor Backward Tabulation <n> tab stops */
870 case 'd': /* VPA -- Move to <row> */
871 DEFAULT(escseq.arg[0], 1);
872 tmoveto(term.c.x, escseq.arg[0]-1);
873 break;
874 case 'h': /* SM -- Set terminal mode */
875 if(escseq.priv) {
876 switch(escseq.arg[0]) {
877 case 1:
878 term.mode |= MODE_APPKEYPAD;
879 break;
880 case 7:
881 term.mode |= MODE_WRAP;
882 break;
883 case 12: /* att610 -- Start blinking cursor (IGNORED) */
884 break;
885 case 25:
886 term.c.state &= ~CURSOR_HIDE;
887 break;
888 case 1049: /* = 1047 and 1048 */
889 case 1047:
890 if(IS_SET(MODE_ALTSCREEN))
891 tclearregion(0, 0, term.col-1, term.row-1);
892 else
893 tswapscreen();
894 if(escseq.arg[0] == 1047)
895 break;
896 case 1048:
897 tcursor(CURSOR_SAVE);
898 break;
899 default: goto unknown;
900 }
901 } else {
902 switch(escseq.arg[0]) {
903 case 4:
904 term.mode |= MODE_INSERT;
905 break;
906 default: goto unknown;
907 }
908 };
909 break;
910 case 'm': /* SGR -- Terminal attribute (color) */
911 tsetattr(escseq.arg, escseq.narg);
912 break;
913 case 'r': /* DECSTBM -- Set Scrolling Region */
914 if(escseq.priv)
915 goto unknown;
916 else {
917 DEFAULT(escseq.arg[0], 1);
918 DEFAULT(escseq.arg[1], term.row);
919 tsetscroll(escseq.arg[0]-1, escseq.arg[1]-1);
920 tmoveto(0, 0);
921 }
922 break;
923 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
924 tcursor(CURSOR_SAVE);
925 break;
926 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
927 tcursor(CURSOR_LOAD);
928 break;
929 }
930 }
931
932 void
933 csidump(void) {
934 int i;
935 printf("ESC [ %s", escseq.priv ? "? " : "");
936 if(escseq.narg)
937 for(i = 0; i < escseq.narg; i++)
938 printf("%d ", escseq.arg[i]);
939 if(escseq.mode)
940 putchar(escseq.mode);
941 putchar('\n');
942 }
943
944 void
945 csireset(void) {
946 memset(&escseq, 0, sizeof(escseq));
947 }
948
949 void
950 tputtab(void) {
951 int space = TAB - term.c.x % TAB;
952 tmoveto(term.c.x + space, term.c.y);
953 }
954
955 void
956 tputc(char c) {
957 if(term.esc & ESC_START) {
958 if(term.esc & ESC_CSI) {
959 escseq.buf[escseq.len++] = c;
960 if(BETWEEN(c, 0x40, 0x7E) || escseq.len >= ESC_BUF_SIZ) {
961 term.esc = 0;
962 csiparse(), csihandle();
963 }
964 } else if(term.esc & ESC_OSC) {
965 if(c == ';') {
966 term.titlelen = 0;
967 term.esc = ESC_START | ESC_TITLE;
968 }
969 } else if(term.esc & ESC_TITLE) {
970 if(c == '\a' || term.titlelen+1 >= ESC_TITLE_SIZ) {
971 term.esc = 0;
972 term.title[term.titlelen] = '\0';
973 XStoreName(xw.dis, xw.win, term.title);
974 } else {
975 term.title[term.titlelen++] = c;
976 }
977 } else if(term.esc & ESC_ALTCHARSET) {
978 switch(c) {
979 case '0': /* Line drawing crap */
980 term.c.attr.mode |= ATTR_GFX;
981 break;
982 case 'B': /* Back to regular text */
983 term.c.attr.mode &= ~ATTR_GFX;
984 break;
985 default:
986 printf("esc unhandled charset: ESC ( %c\n", c);
987 }
988 term.esc = 0;
989 } else {
990 switch(c) {
991 case '[':
992 term.esc |= ESC_CSI;
993 break;
994 case ']':
995 term.esc |= ESC_OSC;
996 break;
997 case '(':
998 term.esc |= ESC_ALTCHARSET;
999 break;
1000 case 'D': /* IND -- Linefeed */
1001 if(term.c.y == term.bot)
1002 tscrollup(1);
1003 else
1004 tmoveto(term.c.x, term.c.y+1);
1005 term.esc = 0;
1006 break;
1007 case 'E': /* NEL -- Next line */
1008 tnewline();
1009 term.esc = 0;
1010 break;
1011 case 'M': /* RI -- Reverse index */
1012 if(term.c.y == term.top)
1013 tscrolldown(1);
1014 else
1015 tmoveto(term.c.x, term.c.y-1);
1016 term.esc = 0;
1017 break;
1018 case 'c': /* RIS -- Reset to inital state */
1019 treset();
1020 term.esc = 0;
1021 break;
1022 case '=': /* DECPAM -- Application keypad */
1023 term.mode |= MODE_APPKEYPAD;
1024 term.esc = 0;
1025 break;
1026 case '>': /* DECPNM -- Normal keypad */
1027 term.mode &= ~MODE_APPKEYPAD;
1028 term.esc = 0;
1029 break;
1030 case '7': /* DECSC -- Save Cursor */
1031 tcursor(CURSOR_SAVE);
1032 term.esc = 0;
1033 break;
1034 case '8': /* DECRC -- Restore Cursor */
1035 tcursor(CURSOR_LOAD);
1036 term.esc = 0;
1037 break;
1038 default:
1039 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n", c, isprint(c)?c:'.');
1040 term.esc = 0;
1041 }
1042 }
1043 } else {
1044 switch(c) {
1045 case '\t':
1046 tputtab();
1047 break;
1048 case '\b':
1049 tmoveto(term.c.x-1, term.c.y);
1050 break;
1051 case '\r':
1052 tmoveto(0, term.c.y);
1053 break;
1054 case '\n':
1055 tnewline();
1056 break;
1057 case '\a':
1058 if(!xw.hasfocus)
1059 xseturgency(1);
1060 break;
1061 case '\033':
1062 csireset();
1063 term.esc = ESC_START;
1064 break;
1065 default:
1066 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
1067 tnewline();
1068 tsetchar(c);
1069 if(term.c.x+1 < term.col)
1070 tmoveto(term.c.x+1, term.c.y);
1071 else
1072 term.c.state |= CURSOR_WRAPNEXT;
1073 break;
1074 }
1075 }
1076 }
1077
1078 void
1079 tputs(char *s, int len) {
1080 for(; len > 0; len--)
1081 tputc(*s++);
1082 }
1083
1084 void
1085 tresize(int col, int row) {
1086 int i;
1087 int minrow = MIN(row, term.row);
1088 int mincol = MIN(col, term.col);
1089
1090 if(col < 1 || row < 1)
1091 return;
1092
1093 /* free uneeded rows */
1094 for(i = row; i < term.row; i++) {
1095 free(term.line[i]);
1096 free(term.alt[i]);
1097 }
1098
1099 /* resize to new height */
1100 term.line = realloc(term.line, row * sizeof(Line));
1101 term.alt = realloc(term.alt, row * sizeof(Line));
1102
1103 /* resize each row to new width, zero-pad if needed */
1104 for(i = 0; i < minrow; i++) {
1105 term.line[i] = realloc(term.line[i], col * sizeof(Glyph));
1106 term.alt[i] = realloc(term.alt[i], col * sizeof(Glyph));
1107 memset(term.line[i] + mincol, 0, (col - mincol) * sizeof(Glyph));
1108 memset(term.alt[i] + mincol, 0, (col - mincol) * sizeof(Glyph));
1109 }
1110
1111 /* allocate any new rows */
1112 for(/* i == minrow */; i < row; i++) {
1113 term.line[i] = calloc(col, sizeof(Glyph));
1114 term.alt [i] = calloc(col, sizeof(Glyph));
1115 }
1116
1117 /* update terminal size */
1118 term.col = col, term.row = row;
1119 /* make use of the LIMIT in tmoveto */
1120 tmoveto(term.c.x, term.c.y);
1121 /* reset scrolling region */
1122 tsetscroll(0, row-1);
1123 }
1124
1125 void
1126 xloadcols(void) {
1127 int i, r, g, b;
1128 XColor color;
1129 Colormap cmap = DefaultColormap(xw.dis, xw.scr);
1130 unsigned long white = WhitePixel(xw.dis, xw.scr);
1131
1132 for(i = 0; i < 16; i++) {
1133 if (!XAllocNamedColor(xw.dis, cmap, colorname[i], &color, &color)) {
1134 dc.col[i] = white;
1135 fprintf(stderr, "Could not allocate color '%s'\n", colorname[i]);
1136 } else
1137 dc.col[i] = color.pixel;
1138 }
1139
1140 /* same colors as xterm */
1141 for(r = 0; r < 6; r++)
1142 for(g = 0; g < 6; g++)
1143 for(b = 0; b < 6; b++) {
1144 color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
1145 color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
1146 color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
1147 if (!XAllocColor(xw.dis, cmap, &color)) {
1148 dc.col[i] = white;
1149 fprintf(stderr, "Could not allocate color %d\n", i);
1150 } else
1151 dc.col[i] = color.pixel;
1152 i++;
1153 }
1154
1155 for(r = 0; r < 24; r++, i++) {
1156 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
1157 if (!XAllocColor(xw.dis, cmap, &color)) {
1158 dc.col[i] = white;
1159 fprintf(stderr, "Could not allocate color %d\n", i);
1160 } else
1161 dc.col[i] = color.pixel;
1162 }
1163 }
1164
1165 void
1166 xclear(int x1, int y1, int x2, int y2) {
1167 XSetForeground(xw.dis, dc.gc, dc.col[DefaultBG]);
1168 XFillRectangle(xw.dis, xw.buf, dc.gc,
1169 x1 * xw.cw, y1 * xw.ch,
1170 (x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch);
1171 }
1172
1173 void
1174 xhints(void)
1175 {
1176 XClassHint class = {TNAME, TNAME};
1177 XWMHints wm = {.flags = InputHint, .input = 1};
1178 XSizeHints size = {
1179 .flags = PSize | PResizeInc | PBaseSize,
1180 .height = xw.h,
1181 .width = xw.w,
1182 .height_inc = xw.ch,
1183 .width_inc = xw.cw,
1184 .base_height = 2*BORDER,
1185 .base_width = 2*BORDER,
1186 };
1187 XSetWMProperties(xw.dis, xw.win, NULL, NULL, NULL, 0, &size, &wm, &class);
1188 }
1189
1190 void
1191 xinit(void) {
1192 if(!(xw.dis = XOpenDisplay(NULL)))
1193 die("Can't open display\n");
1194 xw.scr = XDefaultScreen(xw.dis);
1195
1196 /* font */
1197 if(!(dc.font = XLoadQueryFont(xw.dis, FONT)) || !(dc.bfont = XLoadQueryFont(xw.dis, BOLDFONT)))
1198 die("Can't load font %s\n", dc.font ? BOLDFONT : FONT);
1199
1200 /* XXX: Assuming same size for bold font */
1201 xw.cw = dc.font->max_bounds.rbearing - dc.font->min_bounds.lbearing;
1202 xw.ch = dc.font->ascent + dc.font->descent;
1203
1204 /* colors */
1205 xloadcols();
1206
1207 /* windows */
1208 xw.h = term.row * xw.ch + 2*BORDER;
1209 xw.w = term.col * xw.cw + 2*BORDER;
1210 xw.win = XCreateSimpleWindow(xw.dis, XRootWindow(xw.dis, xw.scr), 0, 0,
1211 xw.w, xw.h, 0,
1212 dc.col[DefaultBG],
1213 dc.col[DefaultBG]);
1214 xw.bufw = xw.w - 2*BORDER;
1215 xw.bufh = xw.h - 2*BORDER;
1216 xw.buf = XCreatePixmap(xw.dis, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dis, xw.scr));
1217 xw.hasfocus = 1;
1218 /* gc */
1219 dc.gc = XCreateGC(xw.dis, xw.win, 0, NULL);
1220 XMapWindow(xw.dis, xw.win);
1221 xhints();
1222 XStoreName(xw.dis, xw.win, "st");
1223 XSync(xw.dis, 0);
1224 }
1225
1226 void
1227 xdraws(char *s, Glyph base, int x, int y, int len) {
1228 unsigned long xfg, xbg;
1229 int winx = x*xw.cw, winy = y*xw.ch + dc.font->ascent, width = len*xw.cw;
1230 int i;
1231
1232 if(base.mode & ATTR_REVERSE)
1233 xfg = dc.col[base.bg], xbg = dc.col[base.fg];
1234 else
1235 xfg = dc.col[base.fg], xbg = dc.col[base.bg];
1236
1237 XSetBackground(xw.dis, dc.gc, xbg);
1238 XSetForeground(xw.dis, dc.gc, xfg);
1239
1240 if(base.mode & ATTR_GFX)
1241 for(i = 0; i < len; i++)
1242 s[i] = gfx[(int)s[i]];
1243
1244 XSetFont(xw.dis, dc.gc, base.mode & ATTR_BOLD ? dc.bfont->fid : dc.font->fid);
1245 XDrawImageString(xw.dis, xw.buf, dc.gc, winx, winy, s, len);
1246
1247 if(base.mode & ATTR_UNDERLINE)
1248 XDrawLine(xw.dis, xw.buf, dc.gc, winx, winy+1, winx+width-1, winy+1);
1249 }
1250
1251 void
1252 xdrawcursor(void) {
1253 static int oldx = 0;
1254 static int oldy = 0;
1255 Glyph g = {' ', ATTR_NULL, DefaultBG, DefaultCS, 0};
1256
1257 LIMIT(oldx, 0, term.col-1);
1258 LIMIT(oldy, 0, term.row-1);
1259
1260 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
1261 g.c = term.line[term.c.y][term.c.x].c;
1262
1263 /* remove the old cursor */
1264 if(term.line[oldy][oldx].state & GLYPH_SET)
1265 xdraws(&term.line[oldy][oldx].c, term.line[oldy][oldx], oldx, oldy, 1);
1266 else
1267 xclear(oldx, oldy, oldx, oldy);
1268
1269 /* draw the new one */
1270 if(!(term.c.state & CURSOR_HIDE) && xw.hasfocus) {
1271 xdraws(&g.c, g, term.c.x, term.c.y, 1);
1272 oldx = term.c.x, oldy = term.c.y;
1273 }
1274 }
1275
1276 #ifdef DEBUG
1277 /* basic drawing routines */
1278 void
1279 xdrawc(int x, int y, Glyph g) {
1280 XRectangle r = { x * xw.cw, y * xw.ch, xw.cw, xw.ch };
1281 XSetBackground(xw.dis, dc.gc, dc.col[g.bg]);
1282 XSetForeground(xw.dis, dc.gc, dc.col[g.fg]);
1283 XSetFont(xw.dis, dc.gc, g.mode & ATTR_BOLD ? dc.bfont->fid : dc.font->fid);
1284 XDrawImageString(xw.dis, xw.buf, dc.gc, r.x, r.y+dc.font->ascent, &g.c, 1);
1285 }
1286
1287 void
1288 draw(int dummy) {
1289 int x, y;
1290
1291 xclear(0, 0, term.col-1, term.row-1);
1292 for(y = 0; y < term.row; y++)
1293 for(x = 0; x < term.col; x++)
1294 if(term.line[y][x].state & GLYPH_SET)
1295 xdrawc(x, y, term.line[y][x]);
1296
1297 xdrawcursor();
1298 XCopyArea(xw.dis, xw.buf, xw.win, dc.gc, 0, 0, xw.bufw, xw.bufh, BORDER, BORDER);
1299 XFlush(xw.dis);
1300 }
1301
1302 #else
1303 /* optimized drawing routine */
1304 void
1305 draw(int redraw_all) {
1306 int i, x, y, ox;
1307 Glyph base, new;
1308 char buf[DRAW_BUF_SIZ];
1309
1310 XSetForeground(xw.dis, dc.gc, dc.col[DefaultBG]);
1311 XFillRectangle(xw.dis, xw.buf, dc.gc, 0, 0, xw.bufw, xw.bufh);
1312 for(y = 0; y < term.row; y++) {
1313 base = term.line[y][0];
1314 i = ox = 0;
1315 for(x = 0; x < term.col; x++) {
1316 new = term.line[y][x];
1317 if(sel.bx!=-1 && new.c && selected(x, y))
1318 new.mode ^= ATTR_REVERSE;
1319 if(i > 0 && (!(new.state & GLYPH_SET) || ATTRCMP(base, new) ||
1320 i >= DRAW_BUF_SIZ)) {
1321 xdraws(buf, base, ox, y, i);
1322 i = 0;
1323 }
1324 if(new.state & GLYPH_SET) {
1325 if(i == 0) {
1326 ox = x;
1327 base = new;
1328 }
1329 buf[i++] = new.c;
1330 }
1331 }
1332 if(i > 0)
1333 xdraws(buf, base, ox, y, i);
1334 }
1335 xdrawcursor();
1336 XCopyArea(xw.dis, xw.buf, xw.win, dc.gc, 0, 0, xw.bufw, xw.bufh, BORDER, BORDER);
1337 XFlush(xw.dis);
1338 }
1339
1340 #endif
1341
1342 void
1343 expose(XEvent *ev) {
1344 draw(SCREEN_REDRAW);
1345 }
1346
1347 void
1348 xseturgency(int add) {
1349 XWMHints *h = XGetWMHints(xw.dis, xw.win);
1350 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
1351 XSetWMHints(xw.dis, xw.win, h);
1352 XFree(h);
1353 }
1354
1355 void
1356 focus(XEvent *ev) {
1357 if((xw.hasfocus = ev->type == FocusIn))
1358 xseturgency(0);
1359 draw(SCREEN_UPDATE);
1360 }
1361
1362 char*
1363 kmap(KeySym k) {
1364 int i;
1365 for(i = 0; i < LEN(key); i++)
1366 if(key[i].k == k)
1367 return (char*)key[i].s;
1368 return NULL;
1369 }
1370
1371 void
1372 kpress(XEvent *ev) {
1373 XKeyEvent *e = &ev->xkey;
1374 KeySym ksym;
1375 char buf[32];
1376 char *customkey;
1377 int len;
1378 int meta;
1379 int shift;
1380
1381 meta = e->state & Mod1Mask;
1382 shift = e->state & ShiftMask;
1383 len = XLookupString(e, buf, sizeof(buf), &ksym, NULL);
1384
1385 if((customkey = kmap(ksym)))
1386 ttywrite(customkey, strlen(customkey));
1387 else if(len > 0) {
1388 buf[sizeof(buf)-1] = '\0';
1389 if(meta && len == 1)
1390 ttywrite("\033", 1);
1391 ttywrite(buf, len);
1392 } else
1393 switch(ksym) {
1394 case XK_Up:
1395 case XK_Down:
1396 case XK_Left:
1397 case XK_Right:
1398 sprintf(buf, "\033%c%c", IS_SET(MODE_APPKEYPAD) ? 'O' : '[', "DACB"[ksym - XK_Left]);
1399 ttywrite(buf, 3);
1400 break;
1401 case XK_Insert:
1402 if(shift)
1403 draw(1), puts("draw!")/* XXX: paste X clipboard */;
1404 break;
1405 default:
1406 fprintf(stderr, "errkey: %d\n", (int)ksym);
1407 break;
1408 }
1409 }
1410
1411 void
1412 resize(XEvent *e) {
1413 int col, row;
1414
1415 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
1416 return;
1417
1418 xw.w = e->xconfigure.width;
1419 xw.h = e->xconfigure.height;
1420 xw.bufw = xw.w - 2*BORDER;
1421 xw.bufh = xw.h - 2*BORDER;
1422 col = xw.bufw / xw.cw;
1423 row = xw.bufh / xw.ch;
1424 tresize(col, row);
1425 ttyresize(col, row);
1426 xw.bufh = MAX(1, xw.bufh);
1427 xw.bufw = MAX(1, xw.bufw);
1428 XFreePixmap(xw.dis, xw.buf);
1429 xw.buf = XCreatePixmap(xw.dis, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dis, xw.scr));
1430 draw(SCREEN_REDRAW);
1431 }
1432
1433 void
1434 run(void) {
1435 XEvent ev;
1436 fd_set rfd;
1437 int xfd = XConnectionNumber(xw.dis);
1438 long mask = ExposureMask | KeyPressMask | StructureNotifyMask
1439 | FocusChangeMask | PointerMotionMask | ButtonPressMask
1440 | ButtonReleaseMask;
1441
1442 XSelectInput(xw.dis, xw.win, mask);
1443 XResizeWindow(xw.dis, xw.win, xw.w, xw.h); /* XXX: fix resize bug in wmii (?) */
1444
1445 for(;;) {
1446 FD_ZERO(&rfd);
1447 FD_SET(cmdfd, &rfd);
1448 FD_SET(xfd, &rfd);
1449 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, NULL) < 0) {
1450 if(errno == EINTR)
1451 continue;
1452 die("select failed: %s\n", SERRNO);
1453 }
1454 if(FD_ISSET(cmdfd, &rfd)) {
1455 ttyread();
1456 draw(SCREEN_UPDATE);
1457 }
1458 while(XPending(xw.dis)) {
1459 XNextEvent(xw.dis, &ev);
1460 if(handler[ev.type])
1461 (handler[ev.type])(&ev);
1462 }
1463 }
1464 }
1465
1466 int
1467 main(int argc, char *argv[]) {
1468 if(argc == 2 && !strncmp("-v", argv[1], 3))
1469 die("st-" VERSION ", (c) 2010 st engineers\n");
1470 else if(argc != 1)
1471 die("usage: st [-v]\n");
1472 setlocale(LC_CTYPE, "");
1473 tnew(80, 24);
1474 ttynew();
1475 xinit();
1476 run();
1477 return 0;
1478 }