Xinqi Bao's Git

projects / st.git / blob
summary | log | commit | diff | tree
history | raw | HEAD
use XCreateWindow(), set gravity bit.
[st.git] / st.c
1 /* See LICENSE for licence details. */
2 #define _XOPEN_SOURCE 600
3 #include <ctype.h>
4 #include <errno.h>
5 #include <fcntl.h>
6 #include <limits.h>
7 #include <locale.h>
8 #include <stdarg.h>
9 #include <stdio.h>
10 #include <stdlib.h>
11 #include <string.h>
12 #include <signal.h>
13 #include <sys/ioctl.h>
14 #include <sys/select.h>
15 #include <sys/stat.h>
16 #include <sys/types.h>
17 #include <sys/wait.h>
18 #include <unistd.h>
19 #include <X11/Xlib.h>
20 #include <X11/keysym.h>
21 #include <X11/Xutil.h>
22
23 #if defined(__linux)
24 #include <pty.h>
25 #elif defined(__OpenBSD__) || defined(__NetBSD__)
26 #include <util.h>
27 #elif defined(__FreeBSD__) || defined(__DragonFly__)
28 #include <libutil.h>
29 #endif
30
31 #define USAGE \
32 "st-" VERSION ", (c) 2010 st engineers\n" \
33 "usage: st [-t title] [-e cmd] [-v]\n"
34
35 /* Arbitrary sizes */
36 #define ESC_TITLE_SIZ 256
37 #define ESC_BUF_SIZ 256
38 #define ESC_ARG_SIZ 16
39 #define DRAW_BUF_SIZ 1024
40
41 #define SERRNO strerror(errno)
42 #define MIN(a, b) ((a) < (b) ? (a) : (b))
43 #define MAX(a, b) ((a) < (b) ? (b) : (a))
44 #define LEN(a) (sizeof(a) / sizeof(a[0]))
45 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
46 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
47 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
48 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
49 #define IS_SET(flag) (term.mode & (flag))
50
51 /* Attribute, Cursor, Character state, Terminal mode, Screen draw mode */
52 enum { ATTR_NULL=0 , ATTR_REVERSE=1 , ATTR_UNDERLINE=2, ATTR_BOLD=4, ATTR_GFX=8 };
53 enum { CURSOR_UP, CURSOR_DOWN, CURSOR_LEFT, CURSOR_RIGHT,
54 CURSOR_SAVE, CURSOR_LOAD };
55 enum { CURSOR_DEFAULT = 0, CURSOR_HIDE = 1, CURSOR_WRAPNEXT = 2 };
56 enum { GLYPH_SET=1, GLYPH_DIRTY=2 };
57 enum { MODE_WRAP=1, MODE_INSERT=2, MODE_APPKEYPAD=4, MODE_ALTSCREEN=8 };
58 enum { ESC_START=1, ESC_CSI=2, ESC_OSC=4, ESC_TITLE=8, ESC_ALTCHARSET=16 };
59 enum { SCREEN_UPDATE, SCREEN_REDRAW };
60
61 typedef struct {
62 char c; /* character code */
63 char mode; /* attribute flags */
64 int fg; /* foreground */
65 int bg; /* background */
66 char state; /* state flags */
67 } Glyph;
68
69 typedef Glyph* Line;
70
71 typedef struct {
72 Glyph attr; /* current char attributes */
73 int x;
74 int y;
75 char state;
76 } TCursor;
77
78 /* CSI Escape sequence structs */
79 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
80 typedef struct {
81 char buf[ESC_BUF_SIZ]; /* raw string */
82 int len; /* raw string length */
83 char priv;
84 int arg[ESC_ARG_SIZ];
85 int narg; /* nb of args */
86 char mode;
87 } CSIEscape;
88
89 /* Internal representation of the screen */
90 typedef struct {
91 int row; /* nb row */
92 int col; /* nb col */
93 Line* line; /* screen */
94 Line* alt; /* alternate screen */
95 TCursor c; /* cursor */
96 int top; /* top scroll limit */
97 int bot; /* bottom scroll limit */
98 int mode; /* terminal mode flags */
99 int esc; /* escape state flags */
100 char title[ESC_TITLE_SIZ];
101 int titlelen;
102 } Term;
103
104 /* Purely graphic info */
105 typedef struct {
106 Display* dis;
107 Colormap cmap;
108 Window win;
109 Pixmap buf;
110 int scr;
111 int w; /* window width */
112 int h; /* window height */
113 int bufw; /* pixmap width */
114 int bufh; /* pixmap height */
115 int ch; /* char height */
116 int cw; /* char width */
117 int hasfocus;
118 } XWindow;
119
120 typedef struct {
121 KeySym k;
122 char s[ESC_BUF_SIZ];
123 } Key;
124
125 /* Drawing Context */
126 typedef struct {
127 unsigned long col[256];
128 XFontStruct* font;
129 XFontStruct* bfont;
130 GC gc;
131 } DC;
132
133 /* TODO: use better name for vars... */
134 typedef struct {
135 int mode;
136 int bx, by;
137 int ex, ey;
138 struct {int x, y;} b, e;
139 char *clip;
140 } Selection;
141
142 #include "config.h"
143
144 static void die(const char *errstr, ...);
145 static void draw(int);
146 static void execsh(void);
147 static void sigchld(int);
148 static void run(void);
149
150 static void csidump(void);
151 static void csihandle(void);
152 static void csiparse(void);
153 static void csireset(void);
154
155 static void tclearregion(int, int, int, int);
156 static void tcursor(int);
157 static void tdeletechar(int);
158 static void tdeleteline(int);
159 static void tinsertblank(int);
160 static void tinsertblankline(int);
161 static void tmoveto(int, int);
162 static void tnew(int, int);
163 static void tnewline(void);
164 static void tputtab(void);
165 static void tputc(char);
166 static void tputs(char*, int);
167 static void treset(void);
168 static void tresize(int, int);
169 static void tscrollup(int, int);
170 static void tscrolldown(int, int);
171 static void tsetattr(int*, int);
172 static void tsetchar(char);
173 static void tsetscroll(int, int);
174 static void tswapscreen(void);
175
176 static void ttynew(void);
177 static void ttyread(void);
178 static void ttyresize(int, int);
179 static void ttywrite(const char *, size_t);
180
181 static void xdraws(char *, Glyph, int, int, int);
182 static void xhints(void);
183 static void xclear(int, int, int, int);
184 static void xdrawcursor(void);
185 static void xinit(void);
186 static void xloadcols(void);
187 static void xseturgency(int);
188
189 static void expose(XEvent *);
190 static char* kmap(KeySym);
191 static void kpress(XEvent *);
192 static void resize(XEvent *);
193 static void focus(XEvent *);
194 static void brelease(XEvent *);
195 static void bpress(XEvent *);
196 static void bmotion(XEvent *);
197
198
199 static void (*handler[LASTEvent])(XEvent *) = {
200 [KeyPress] = kpress,
201 [Expose] = expose,
202 [ConfigureNotify] = resize,
203 [FocusIn] = focus,
204 [FocusOut] = focus,
205 [MotionNotify] = bmotion,
206 [ButtonPress] = bpress,
207 [ButtonRelease] = brelease,
208 };
209
210 /* Globals */
211 static DC dc;
212 static XWindow xw;
213 static Term term;
214 static CSIEscape escseq;
215 static int cmdfd;
216 static pid_t pid;
217 static Selection sel;
218 static char *opt_cmd = NULL;
219 static char *opt_title = NULL;
220
221 void
222 selinit(void) {
223 sel.mode = 0;
224 sel.bx = -1;
225 sel.clip = NULL;
226 }
227
228 static inline int selected(int x, int y) {
229 if(sel.ey == y && sel.by == y) {
230 int bx = MIN(sel.bx, sel.ex);
231 int ex = MAX(sel.bx, sel.ex);
232 return BETWEEN(x, bx, ex);
233 }
234 return ((sel.b.y < y&&y < sel.e.y) || (y==sel.e.y && x<=sel.e.x))
235 || (y==sel.b.y && x>=sel.b.x && (x<=sel.e.x || sel.b.y!=sel.e.y));
236 }
237
238 static void getbuttoninfo(XEvent *e, int *b, int *x, int *y) {
239 if(b) *b = e->xbutton.state,
240 *b=*b==4096?5:*b==2048?4:*b==1024?3:*b==512?2:*b==256?1:-1;
241 *x = e->xbutton.x/xw.cw;
242 *y = e->xbutton.y/xw.ch;
243 sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
244 sel.b.y = MIN(sel.by, sel.ey);
245 sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
246 sel.e.y = MAX(sel.by, sel.ey);
247 }
248
249 static void bpress(XEvent *e) {
250 sel.mode = 1;
251 sel.ex = sel.bx = e->xbutton.x/xw.cw;
252 sel.ey = sel.by = e->xbutton.y/xw.ch;
253 }
254
255 static char *getseltext() {
256 char *str, *ptr;
257 int ls, x, y, sz;
258 if(sel.bx == -1)
259 return NULL;
260 sz = (term.col+1) * (sel.e.y-sel.b.y+1);
261 ptr = str = malloc(sz);
262 for(y = 0; y < term.row; y++) {
263 for(x = 0; x < term.col; x++)
264 if(term.line[y][x].state & GLYPH_SET && (ls = selected(x, y)))
265 *ptr = term.line[y][x].c, ptr++;
266 if(ls)
267 *ptr = '\n', ptr++;
268 }
269 *ptr = 0;
270 return str;
271 }
272
273 /* TODO: use X11 clipboard */
274 static void selcopy(char *str) {
275 free(sel.clip);
276 sel.clip = str;
277 }
278
279 static void selpaste() {
280 if(sel.clip)
281 ttywrite(sel.clip, strlen(sel.clip));
282 }
283
284 /* TODO: doubleclick to select word */
285 static void brelease(XEvent *e) {
286 int b;
287 sel.mode = 0;
288 getbuttoninfo(e, &b, &sel.ex, &sel.ey);
289 if(sel.bx==sel.ex && sel.by==sel.ey) {
290 sel.bx = -1;
291 if(b==2)
292 selpaste();
293 } else {
294 if(b==1)
295 selcopy(getseltext());
296 }
297 draw(1);
298 }
299
300 static void bmotion(XEvent *e) {
301 if (sel.mode) {
302 getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
303 draw(1);
304 }
305 }
306
307 #ifdef DEBUG
308 void
309 tdump(void) {
310 int row, col;
311 Glyph c;
312
313 for(row = 0; row < term.row; row++) {
314 for(col = 0; col < term.col; col++) {
315 if(col == term.c.x && row == term.c.y)
316 putchar('#');
317 else {
318 c = term.line[row][col];
319 putchar(c.state & GLYPH_SET ? c.c : '.');
320 }
321 }
322 putchar('\n');
323 }
324 }
325 #endif
326
327 void
328 die(const char *errstr, ...) {
329 va_list ap;
330
331 va_start(ap, errstr);
332 vfprintf(stderr, errstr, ap);
333 va_end(ap);
334 exit(EXIT_FAILURE);
335 }
336
337 void
338 execsh(void) {
339 char *args[] = {getenv("SHELL"), "-i", NULL};
340 if(opt_cmd)
341 args[0] = opt_cmd, args[1] = NULL;
342 else
343 DEFAULT(args[0], SHELL);
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];
401 int ret;
402
403 if((ret = read(cmdfd, buf, LEN(buf))) < 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 orig, int n) {
473 int i;
474 Line temp;
475
476 LIMIT(n, 0, term.bot-orig+1);
477
478 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
479
480 for(i = term.bot; i >= orig+n; i--) {
481 temp = term.line[i];
482 term.line[i] = term.line[i-n];
483 term.line[i-n] = temp;
484 }
485 }
486
487 void
488 tscrollup(int orig, int n) {
489 int i;
490 Line temp;
491 LIMIT(n, 0, term.bot-orig+1);
492
493 tclearregion(0, orig, term.col-1, orig+n-1);
494
495 for(i = orig; i <= term.bot-n; i++) {
496 temp = term.line[i];
497 term.line[i] = term.line[i+n];
498 term.line[i+n] = temp;
499 }
500 }
501
502 void
503 tnewline(void) {
504 int y = term.c.y;
505 if(term.c.y == term.bot)
506 tscrollup(term.top, 1);
507 else
508 y++;
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 if(term.c.y < term.top || term.c.y > term.bot)
601 return;
602
603 tscrolldown(term.c.y, n);
604 }
605
606 void
607 tdeleteline(int n) {
608 if(term.c.y < term.top || term.c.y > term.bot)
609 return;
610
611 tscrollup(term.c.y, n);
612 }
613
614 void
615 tsetattr(int *attr, int l) {
616 int i;
617
618 for(i = 0; i < l; i++) {
619 switch(attr[i]) {
620 case 0:
621 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD);
622 term.c.attr.fg = DefaultFG;
623 term.c.attr.bg = DefaultBG;
624 break;
625 case 1:
626 term.c.attr.mode |= ATTR_BOLD;
627 break;
628 case 4:
629 term.c.attr.mode |= ATTR_UNDERLINE;
630 break;
631 case 7:
632 term.c.attr.mode |= ATTR_REVERSE;
633 break;
634 case 22:
635 term.c.attr.mode &= ~ATTR_BOLD;
636 break;
637 case 24:
638 term.c.attr.mode &= ~ATTR_UNDERLINE;
639 break;
640 case 27:
641 term.c.attr.mode &= ~ATTR_REVERSE;
642 break;
643 case 38:
644 if (i + 2 < l && attr[i + 1] == 5) {
645 i += 2;
646 if (BETWEEN(attr[i], 0, 255))
647 term.c.attr.fg = attr[i];
648 else
649 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[i]);
650 }
651 else
652 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
653 break;
654 case 39:
655 term.c.attr.fg = DefaultFG;
656 break;
657 case 48:
658 if (i + 2 < l && attr[i + 1] == 5) {
659 i += 2;
660 if (BETWEEN(attr[i], 0, 255))
661 term.c.attr.bg = attr[i];
662 else
663 fprintf(stderr, "erresc: bad bgcolor %d\n", attr[i]);
664 }
665 else
666 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
667 break;
668 case 49:
669 term.c.attr.bg = DefaultBG;
670 break;
671 default:
672 if(BETWEEN(attr[i], 30, 37))
673 term.c.attr.fg = attr[i] - 30;
674 else if(BETWEEN(attr[i], 40, 47))
675 term.c.attr.bg = attr[i] - 40;
676 else if(BETWEEN(attr[i], 90, 97))
677 term.c.attr.fg = attr[i] - 90 + 8;
678 else if(BETWEEN(attr[i], 100, 107))
679 term.c.attr.fg = attr[i] - 100 + 8;
680 else
681 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]), csidump();
682
683 break;
684 }
685 }
686 }
687
688 void
689 tsetscroll(int t, int b) {
690 int temp;
691
692 LIMIT(t, 0, term.row-1);
693 LIMIT(b, 0, term.row-1);
694 if(t > b) {
695 temp = t;
696 t = b;
697 b = temp;
698 }
699 term.top = t;
700 term.bot = b;
701 }
702
703 void
704 csihandle(void) {
705 switch(escseq.mode) {
706 default:
707 unknown:
708 printf("erresc: unknown csi ");
709 csidump();
710 /* die(""); */
711 break;
712 case '@': /* ICH -- Insert <n> blank char */
713 DEFAULT(escseq.arg[0], 1);
714 tinsertblank(escseq.arg[0]);
715 break;
716 case 'A': /* CUU -- Cursor <n> Up */
717 case 'e':
718 DEFAULT(escseq.arg[0], 1);
719 tmoveto(term.c.x, term.c.y-escseq.arg[0]);
720 break;
721 case 'B': /* CUD -- Cursor <n> Down */
722 DEFAULT(escseq.arg[0], 1);
723 tmoveto(term.c.x, term.c.y+escseq.arg[0]);
724 break;
725 case 'C': /* CUF -- Cursor <n> Forward */
726 case 'a':
727 DEFAULT(escseq.arg[0], 1);
728 tmoveto(term.c.x+escseq.arg[0], term.c.y);
729 break;
730 case 'D': /* CUB -- Cursor <n> Backward */
731 DEFAULT(escseq.arg[0], 1);
732 tmoveto(term.c.x-escseq.arg[0], term.c.y);
733 break;
734 case 'E': /* CNL -- Cursor <n> Down and first col */
735 DEFAULT(escseq.arg[0], 1);
736 tmoveto(0, term.c.y+escseq.arg[0]);
737 break;
738 case 'F': /* CPL -- Cursor <n> Up and first col */
739 DEFAULT(escseq.arg[0], 1);
740 tmoveto(0, term.c.y-escseq.arg[0]);
741 break;
742 case 'G': /* CHA -- Move to <col> */
743 case '`': /* XXX: HPA -- same? */
744 DEFAULT(escseq.arg[0], 1);
745 tmoveto(escseq.arg[0]-1, term.c.y);
746 break;
747 case 'H': /* CUP -- Move to <row> <col> */
748 case 'f': /* XXX: HVP -- same? */
749 DEFAULT(escseq.arg[0], 1);
750 DEFAULT(escseq.arg[1], 1);
751 tmoveto(escseq.arg[1]-1, escseq.arg[0]-1);
752 break;
753 /* XXX: (CSI n I) CHT -- Cursor Forward Tabulation <n> tab stops */
754 case 'J': /* ED -- Clear screen */
755 switch(escseq.arg[0]) {
756 case 0: /* below */
757 tclearregion(term.c.x, term.c.y, term.col-1, term.row-1);
758 break;
759 case 1: /* above */
760 tclearregion(0, 0, term.c.x, term.c.y);
761 break;
762 case 2: /* all */
763 tclearregion(0, 0, term.col-1, term.row-1);
764 break;
765 default:
766 goto unknown;
767 }
768 break;
769 case 'K': /* EL -- Clear line */
770 switch(escseq.arg[0]) {
771 case 0: /* right */
772 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
773 break;
774 case 1: /* left */
775 tclearregion(0, term.c.y, term.c.x, term.c.y);
776 break;
777 case 2: /* all */
778 tclearregion(0, term.c.y, term.col-1, term.c.y);
779 break;
780 }
781 break;
782 case 'S': /* SU -- Scroll <n> line up */
783 DEFAULT(escseq.arg[0], 1);
784 tscrollup(term.top, escseq.arg[0]);
785 break;
786 case 'T': /* SD -- Scroll <n> line down */
787 DEFAULT(escseq.arg[0], 1);
788 tscrolldown(term.top, escseq.arg[0]);
789 break;
790 case 'L': /* IL -- Insert <n> blank lines */
791 DEFAULT(escseq.arg[0], 1);
792 tinsertblankline(escseq.arg[0]);
793 break;
794 case 'l': /* RM -- Reset Mode */
795 if(escseq.priv) {
796 switch(escseq.arg[0]) {
797 case 1:
798 term.mode &= ~MODE_APPKEYPAD;
799 break;
800 case 5: /* TODO: DECSCNM -- Remove reverse video */
801 break;
802 case 7:
803 term.mode &= ~MODE_WRAP;
804 break;
805 case 12: /* att610 -- Stop blinking cursor (IGNORED) */
806 break;
807 case 25:
808 term.c.state |= CURSOR_HIDE;
809 break;
810 case 1049: /* = 1047 and 1048 */
811 case 1047:
812 if(IS_SET(MODE_ALTSCREEN)) {
813 tclearregion(0, 0, term.col-1, term.row-1);
814 tswapscreen();
815 }
816 if(escseq.arg[0] == 1047)
817 break;
818 case 1048:
819 tcursor(CURSOR_LOAD);
820 break;
821 default:
822 goto unknown;
823 }
824 } else {
825 switch(escseq.arg[0]) {
826 case 4:
827 term.mode &= ~MODE_INSERT;
828 break;
829 default:
830 goto unknown;
831 }
832 }
833 break;
834 case 'M': /* DL -- Delete <n> lines */
835 DEFAULT(escseq.arg[0], 1);
836 tdeleteline(escseq.arg[0]);
837 break;
838 case 'X': /* ECH -- Erase <n> char */
839 DEFAULT(escseq.arg[0], 1);
840 tclearregion(term.c.x, term.c.y, term.c.x + escseq.arg[0], term.c.y);
841 break;
842 case 'P': /* DCH -- Delete <n> char */
843 DEFAULT(escseq.arg[0], 1);
844 tdeletechar(escseq.arg[0]);
845 break;
846 /* XXX: (CSI n Z) CBT -- Cursor Backward Tabulation <n> tab stops */
847 case 'd': /* VPA -- Move to <row> */
848 DEFAULT(escseq.arg[0], 1);
849 tmoveto(term.c.x, escseq.arg[0]-1);
850 break;
851 case 'h': /* SM -- Set terminal mode */
852 if(escseq.priv) {
853 switch(escseq.arg[0]) {
854 case 1:
855 term.mode |= MODE_APPKEYPAD;
856 break;
857 case 5: /* DECSCNM -- Reverve video */
858 /* TODO: set REVERSE on the whole screen (f) */
859 break;
860 case 7:
861 term.mode |= MODE_WRAP;
862 break;
863 case 12: /* att610 -- Start blinking cursor (IGNORED) */
864 /* fallthrough for xterm cvvis = CSI [ ? 12 ; 25 h */
865 if(escseq.narg > 1 && escseq.arg[1] != 25)
866 break;
867 case 25:
868 term.c.state &= ~CURSOR_HIDE;
869 break;
870 case 1049: /* = 1047 and 1048 */
871 case 1047:
872 if(IS_SET(MODE_ALTSCREEN))
873 tclearregion(0, 0, term.col-1, term.row-1);
874 else
875 tswapscreen();
876 if(escseq.arg[0] == 1047)
877 break;
878 case 1048:
879 tcursor(CURSOR_SAVE);
880 break;
881 default: goto unknown;
882 }
883 } else {
884 switch(escseq.arg[0]) {
885 case 4:
886 term.mode |= MODE_INSERT;
887 break;
888 default: goto unknown;
889 }
890 };
891 break;
892 case 'm': /* SGR -- Terminal attribute (color) */
893 tsetattr(escseq.arg, escseq.narg);
894 break;
895 case 'r': /* DECSTBM -- Set Scrolling Region */
896 if(escseq.priv)
897 goto unknown;
898 else {
899 DEFAULT(escseq.arg[0], 1);
900 DEFAULT(escseq.arg[1], term.row);
901 tsetscroll(escseq.arg[0]-1, escseq.arg[1]-1);
902 tmoveto(0, 0);
903 }
904 break;
905 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
906 tcursor(CURSOR_SAVE);
907 break;
908 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
909 tcursor(CURSOR_LOAD);
910 break;
911 }
912 }
913
914 void
915 csidump(void) {
916 int i;
917 printf("ESC [ %s", escseq.priv ? "? " : "");
918 if(escseq.narg)
919 for(i = 0; i < escseq.narg; i++)
920 printf("%d ", escseq.arg[i]);
921 if(escseq.mode)
922 putchar(escseq.mode);
923 putchar('\n');
924 }
925
926 void
927 csireset(void) {
928 memset(&escseq, 0, sizeof(escseq));
929 }
930
931 void
932 tputtab(void) {
933 int space = TAB - term.c.x % TAB;
934 tmoveto(term.c.x + space, term.c.y);
935 }
936
937 void
938 tputc(char c) {
939 if(term.esc & ESC_START) {
940 if(term.esc & ESC_CSI) {
941 escseq.buf[escseq.len++] = c;
942 if(BETWEEN(c, 0x40, 0x7E) || escseq.len >= ESC_BUF_SIZ) {
943 term.esc = 0;
944 csiparse(), csihandle();
945 }
946 /* TODO: handle other OSC */
947 } else if(term.esc & ESC_OSC) {
948 if(c == ';') {
949 term.titlelen = 0;
950 term.esc = ESC_START | ESC_TITLE;
951 }
952 } else if(term.esc & ESC_TITLE) {
953 if(c == '\a' || term.titlelen+1 >= ESC_TITLE_SIZ) {
954 term.esc = 0;
955 term.title[term.titlelen] = '\0';
956 XStoreName(xw.dis, xw.win, term.title);
957 } else {
958 term.title[term.titlelen++] = c;
959 }
960 } else if(term.esc & ESC_ALTCHARSET) {
961 switch(c) {
962 case '0': /* Line drawing crap */
963 term.c.attr.mode |= ATTR_GFX;
964 break;
965 case 'B': /* Back to regular text */
966 term.c.attr.mode &= ~ATTR_GFX;
967 break;
968 default:
969 printf("esc unhandled charset: ESC ( %c\n", c);
970 }
971 term.esc = 0;
972 } else {
973 switch(c) {
974 case '[':
975 term.esc |= ESC_CSI;
976 break;
977 case ']':
978 term.esc |= ESC_OSC;
979 break;
980 case '(':
981 term.esc |= ESC_ALTCHARSET;
982 break;
983 case 'D': /* IND -- Linefeed */
984 if(term.c.y == term.bot)
985 tscrollup(term.top, 1);
986 else
987 tmoveto(term.c.x, term.c.y+1);
988 term.esc = 0;
989 break;
990 case 'E': /* NEL -- Next line */
991 tnewline();
992 term.esc = 0;
993 break;
994 case 'M': /* RI -- Reverse index */
995 if(term.c.y == term.top)
996 tscrolldown(term.top, 1);
997 else
998 tmoveto(term.c.x, term.c.y-1);
999 term.esc = 0;
1000 break;
1001 case 'c': /* RIS -- Reset to inital state */
1002 treset();
1003 term.esc = 0;
1004 break;
1005 case '=': /* DECPAM -- Application keypad */
1006 term.mode |= MODE_APPKEYPAD;
1007 term.esc = 0;
1008 break;
1009 case '>': /* DECPNM -- Normal keypad */
1010 term.mode &= ~MODE_APPKEYPAD;
1011 term.esc = 0;
1012 break;
1013 case '7': /* DECSC -- Save Cursor */
1014 tcursor(CURSOR_SAVE);
1015 term.esc = 0;
1016 break;
1017 case '8': /* DECRC -- Restore Cursor */
1018 tcursor(CURSOR_LOAD);
1019 term.esc = 0;
1020 break;
1021 default:
1022 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n", c, isprint(c)?c:'.');
1023 term.esc = 0;
1024 }
1025 }
1026 } else {
1027 switch(c) {
1028 case '\t':
1029 tputtab();
1030 break;
1031 case '\b':
1032 tmoveto(term.c.x-1, term.c.y);
1033 break;
1034 case '\r':
1035 tmoveto(0, term.c.y);
1036 break;
1037 case '\n':
1038 tnewline();
1039 break;
1040 case '\a':
1041 if(!xw.hasfocus)
1042 xseturgency(1);
1043 break;
1044 case '\033':
1045 csireset();
1046 term.esc = ESC_START;
1047 break;
1048 default:
1049 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
1050 tnewline();
1051 tsetchar(c);
1052 if(term.c.x+1 < term.col)
1053 tmoveto(term.c.x+1, term.c.y);
1054 else
1055 term.c.state |= CURSOR_WRAPNEXT;
1056 break;
1057 }
1058 }
1059 }
1060
1061 void
1062 tputs(char *s, int len) {
1063 for(; len > 0; len--)
1064 tputc(*s++);
1065 }
1066
1067 void
1068 tresize(int col, int row) {
1069 int i;
1070 int minrow = MIN(row, term.row);
1071 int mincol = MIN(col, term.col);
1072 int slide = term.c.y - row + 1;
1073
1074 if(col < 1 || row < 1)
1075 return;
1076
1077 /* free unneeded rows */
1078 i = 0;
1079 if(slide > 0) {
1080 /* slide screen to keep cursor where we expect it -
1081 * tscrollup would work here, but we can optimize to
1082 * memmove because we're freeing the earlier lines */
1083 for(/* i = 0 */; i < slide; i++) {
1084 free(term.line[i]);
1085 free(term.alt[i]);
1086 }
1087 memmove(term.line, term.line + slide, row * sizeof(Line));
1088 memmove(term.alt, term.alt + slide, row * sizeof(Line));
1089 }
1090 for(i += row; i < term.row; i++) {
1091 free(term.line[i]);
1092 free(term.alt[i]);
1093 }
1094
1095 /* resize to new height */
1096 term.line = realloc(term.line, row * sizeof(Line));
1097 term.alt = realloc(term.alt, row * sizeof(Line));
1098
1099 /* resize each row to new width, zero-pad if needed */
1100 for(i = 0; i < minrow; i++) {
1101 term.line[i] = realloc(term.line[i], col * sizeof(Glyph));
1102 term.alt[i] = realloc(term.alt[i], col * sizeof(Glyph));
1103 memset(term.line[i] + mincol, 0, (col - mincol) * sizeof(Glyph));
1104 memset(term.alt[i] + mincol, 0, (col - mincol) * sizeof(Glyph));
1105 }
1106
1107 /* allocate any new rows */
1108 for(/* i == minrow */; i < row; i++) {
1109 term.line[i] = calloc(col, sizeof(Glyph));
1110 term.alt [i] = calloc(col, sizeof(Glyph));
1111 }
1112
1113 /* update terminal size */
1114 term.col = col, term.row = row;
1115 /* make use of the LIMIT in tmoveto */
1116 tmoveto(term.c.x, term.c.y);
1117 /* reset scrolling region */
1118 tsetscroll(0, row-1);
1119 }
1120
1121 void
1122 xloadcols(void) {
1123 int i, r, g, b;
1124 XColor color;
1125 unsigned long white = WhitePixel(xw.dis, xw.scr);
1126
1127 for(i = 0; i < 16; i++) {
1128 if (!XAllocNamedColor(xw.dis, xw.cmap, colorname[i], &color, &color)) {
1129 dc.col[i] = white;
1130 fprintf(stderr, "Could not allocate color '%s'\n", colorname[i]);
1131 } else
1132 dc.col[i] = color.pixel;
1133 }
1134
1135 /* same colors as xterm */
1136 for(r = 0; r < 6; r++)
1137 for(g = 0; g < 6; g++)
1138 for(b = 0; b < 6; b++) {
1139 color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
1140 color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
1141 color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
1142 if (!XAllocColor(xw.dis, xw.cmap, &color)) {
1143 dc.col[i] = white;
1144 fprintf(stderr, "Could not allocate color %d\n", i);
1145 } else
1146 dc.col[i] = color.pixel;
1147 i++;
1148 }
1149
1150 for(r = 0; r < 24; r++, i++) {
1151 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
1152 if (!XAllocColor(xw.dis, xw.cmap, &color)) {
1153 dc.col[i] = white;
1154 fprintf(stderr, "Could not allocate color %d\n", i);
1155 } else
1156 dc.col[i] = color.pixel;
1157 }
1158 }
1159
1160 void
1161 xclear(int x1, int y1, int x2, int y2) {
1162 XSetForeground(xw.dis, dc.gc, dc.col[DefaultBG]);
1163 XFillRectangle(xw.dis, xw.buf, dc.gc,
1164 x1 * xw.cw, y1 * xw.ch,
1165 (x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch);
1166 }
1167
1168 void
1169 xhints(void)
1170 {
1171 XClassHint class = {TNAME, TNAME};
1172 XWMHints wm = {.flags = InputHint, .input = 1};
1173 XSizeHints size = {
1174 .flags = PSize | PResizeInc | PBaseSize,
1175 .height = xw.h,
1176 .width = xw.w,
1177 .height_inc = xw.ch,
1178 .width_inc = xw.cw,
1179 .base_height = 2*BORDER,
1180 .base_width = 2*BORDER,
1181 };
1182 XSetWMProperties(xw.dis, xw.win, NULL, NULL, NULL, 0, &size, &wm, &class);
1183 }
1184
1185 void
1186 xinit(void) {
1187 XSetWindowAttributes attrs;
1188
1189 if(!(xw.dis = XOpenDisplay(NULL)))
1190 die("Can't open display\n");
1191 xw.scr = XDefaultScreen(xw.dis);
1192
1193 /* font */
1194 if(!(dc.font = XLoadQueryFont(xw.dis, FONT)) || !(dc.bfont = XLoadQueryFont(xw.dis, BOLDFONT)))
1195 die("Can't load font %s\n", dc.font ? BOLDFONT : FONT);
1196
1197 /* XXX: Assuming same size for bold font */
1198 xw.cw = dc.font->max_bounds.rbearing - dc.font->min_bounds.lbearing;
1199 xw.ch = dc.font->ascent + dc.font->descent;
1200
1201 /* colors */
1202 xw.cmap = XDefaultColormap(xw.dis, xw.scr);
1203 xloadcols();
1204
1205 /* window - default size */
1206 xw.bufh = 24 * xw.ch;
1207 xw.bufw = 80 * xw.cw;
1208 xw.h = xw.bufh + 2*BORDER;
1209 xw.w = xw.bufw + 2*BORDER;
1210
1211 attrs.background_pixel = dc.col[DefaultBG];
1212 attrs.border_pixel = dc.col[DefaultBG];
1213 attrs.bit_gravity = NorthWestGravity;
1214 attrs.event_mask = ExposureMask | KeyPressMask
1215 | StructureNotifyMask | FocusChangeMask | PointerMotionMask
1216 | ButtonPressMask | ButtonReleaseMask;
1217 attrs.colormap = xw.cmap;
1218
1219 xw.win = XCreateWindow(xw.dis, XRootWindow(xw.dis, xw.scr), 0, 0,
1220 xw.w, xw.h, 0, XDefaultDepth(xw.dis, xw.scr), InputOutput,
1221 XDefaultVisual(xw.dis, xw.scr),
1222 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
1223 | CWColormap,
1224 &attrs);
1225 xw.buf = XCreatePixmap(xw.dis, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dis, xw.scr));
1226 /* gc */
1227 dc.gc = XCreateGC(xw.dis, xw.win, 0, NULL);
1228
1229 XMapWindow(xw.dis, xw.win);
1230 xhints();
1231 XStoreName(xw.dis, xw.win, opt_title ? opt_title : "st");
1232 XSync(xw.dis, 0);
1233 }
1234
1235 void
1236 xdraws(char *s, Glyph base, int x, int y, int len) {
1237 unsigned long xfg, xbg;
1238 int winx = x*xw.cw, winy = y*xw.ch + dc.font->ascent, width = len*xw.cw;
1239 int i;
1240
1241 if(base.mode & ATTR_REVERSE)
1242 xfg = dc.col[base.bg], xbg = dc.col[base.fg];
1243 else
1244 xfg = dc.col[base.fg], xbg = dc.col[base.bg];
1245
1246 XSetBackground(xw.dis, dc.gc, xbg);
1247 XSetForeground(xw.dis, dc.gc, xfg);
1248
1249 if(base.mode & ATTR_GFX)
1250 for(i = 0; i < len; i++) {
1251 char c = gfx[(unsigned int)s[i] % 256];
1252 if(c)
1253 s[i] = c;
1254 else if(s[i] > 0x5f)
1255 s[i] -= 0x5f;
1256 }
1257
1258 XSetFont(xw.dis, dc.gc, base.mode & ATTR_BOLD ? dc.bfont->fid : dc.font->fid);
1259 XDrawImageString(xw.dis, xw.buf, dc.gc, winx, winy, s, len);
1260
1261 if(base.mode & ATTR_UNDERLINE)
1262 XDrawLine(xw.dis, xw.buf, dc.gc, winx, winy+1, winx+width-1, winy+1);
1263 }
1264
1265 void
1266 xdrawcursor(void) {
1267 static int oldx = 0;
1268 static int oldy = 0;
1269 Glyph g = {' ', ATTR_NULL, DefaultBG, DefaultCS, 0};
1270
1271 LIMIT(oldx, 0, term.col-1);
1272 LIMIT(oldy, 0, term.row-1);
1273
1274 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
1275 g.c = term.line[term.c.y][term.c.x].c;
1276
1277 /* remove the old cursor */
1278 if(term.line[oldy][oldx].state & GLYPH_SET)
1279 xdraws(&term.line[oldy][oldx].c, term.line[oldy][oldx], oldx, oldy, 1);
1280 else
1281 xclear(oldx, oldy, oldx, oldy);
1282
1283 /* draw the new one */
1284 if(!(term.c.state & CURSOR_HIDE) && xw.hasfocus) {
1285 xdraws(&g.c, g, term.c.x, term.c.y, 1);
1286 oldx = term.c.x, oldy = term.c.y;
1287 }
1288 }
1289
1290 #ifdef DEBUG
1291 /* basic drawing routines */
1292 void
1293 xdrawc(int x, int y, Glyph g) {
1294 XRectangle r = { x * xw.cw, y * xw.ch, xw.cw, xw.ch };
1295 XSetBackground(xw.dis, dc.gc, dc.col[g.bg]);
1296 XSetForeground(xw.dis, dc.gc, dc.col[g.fg]);
1297 XSetFont(xw.dis, dc.gc, g.mode & ATTR_BOLD ? dc.bfont->fid : dc.font->fid);
1298 XDrawImageString(xw.dis, xw.buf, dc.gc, r.x, r.y+dc.font->ascent, &g.c, 1);
1299 }
1300
1301 void
1302 draw(int dummy) {
1303 int x, y;
1304
1305 xclear(0, 0, term.col-1, term.row-1);
1306 for(y = 0; y < term.row; y++)
1307 for(x = 0; x < term.col; x++)
1308 if(term.line[y][x].state & GLYPH_SET)
1309 xdrawc(x, y, term.line[y][x]);
1310
1311 xdrawcursor();
1312 XCopyArea(xw.dis, xw.buf, xw.win, dc.gc, 0, 0, xw.bufw, xw.bufh, BORDER, BORDER);
1313 XFlush(xw.dis);
1314 }
1315
1316 #else
1317 /* optimized drawing routine */
1318 void
1319 draw(int redraw_all) {
1320 int i, x, y, ox;
1321 Glyph base, new;
1322 char buf[DRAW_BUF_SIZ];
1323
1324 XSetForeground(xw.dis, dc.gc, dc.col[DefaultBG]);
1325 XFillRectangle(xw.dis, xw.buf, dc.gc, 0, 0, xw.bufw, xw.bufh);
1326 for(y = 0; y < term.row; y++) {
1327 base = term.line[y][0];
1328 i = ox = 0;
1329 for(x = 0; x < term.col; x++) {
1330 new = term.line[y][x];
1331 if(sel.bx!=-1 && new.c && selected(x, y))
1332 new.mode ^= ATTR_REVERSE;
1333 if(i > 0 && (!(new.state & GLYPH_SET) || ATTRCMP(base, new) ||
1334 i >= DRAW_BUF_SIZ)) {
1335 xdraws(buf, base, ox, y, i);
1336 i = 0;
1337 }
1338 if(new.state & GLYPH_SET) {
1339 if(i == 0) {
1340 ox = x;
1341 base = new;
1342 }
1343 buf[i++] = new.c;
1344 }
1345 }
1346 if(i > 0)
1347 xdraws(buf, base, ox, y, i);
1348 }
1349 xdrawcursor();
1350 XCopyArea(xw.dis, xw.buf, xw.win, dc.gc, 0, 0, xw.bufw, xw.bufh, BORDER, BORDER);
1351 XFlush(xw.dis);
1352 }
1353
1354 #endif
1355
1356 void
1357 expose(XEvent *ev) {
1358 draw(SCREEN_REDRAW);
1359 }
1360
1361 void
1362 xseturgency(int add) {
1363 XWMHints *h = XGetWMHints(xw.dis, xw.win);
1364 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
1365 XSetWMHints(xw.dis, xw.win, h);
1366 XFree(h);
1367 }
1368
1369 void
1370 focus(XEvent *ev) {
1371 if((xw.hasfocus = ev->type == FocusIn))
1372 xseturgency(0);
1373 draw(SCREEN_UPDATE);
1374 }
1375
1376 char*
1377 kmap(KeySym k) {
1378 int i;
1379 for(i = 0; i < LEN(key); i++)
1380 if(key[i].k == k)
1381 return (char*)key[i].s;
1382 return NULL;
1383 }
1384
1385 void
1386 kpress(XEvent *ev) {
1387 XKeyEvent *e = &ev->xkey;
1388 KeySym ksym;
1389 char buf[32];
1390 char *customkey;
1391 int len;
1392 int meta;
1393 int shift;
1394
1395 meta = e->state & Mod1Mask;
1396 shift = e->state & ShiftMask;
1397 len = XLookupString(e, buf, sizeof(buf), &ksym, NULL);
1398
1399 if((customkey = kmap(ksym)))
1400 ttywrite(customkey, strlen(customkey));
1401 else if(len > 0) {
1402 buf[sizeof(buf)-1] = '\0';
1403 if(meta && len == 1)
1404 ttywrite("\033", 1);
1405 ttywrite(buf, len);
1406 } else
1407 switch(ksym) {
1408 case XK_Up:
1409 case XK_Down:
1410 case XK_Left:
1411 case XK_Right:
1412 sprintf(buf, "\033%c%c", IS_SET(MODE_APPKEYPAD) ? 'O' : '[', "DACB"[ksym - XK_Left]);
1413 ttywrite(buf, 3);
1414 break;
1415 case XK_Insert:
1416 if(shift)
1417 selpaste(), draw(1);
1418 break;
1419 default:
1420 fprintf(stderr, "errkey: %d\n", (int)ksym);
1421 break;
1422 }
1423 }
1424
1425 void
1426 resize(XEvent *e) {
1427 int col, row;
1428
1429 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
1430 return;
1431
1432 xw.w = e->xconfigure.width;
1433 xw.h = e->xconfigure.height;
1434 xw.bufw = xw.w - 2*BORDER;
1435 xw.bufh = xw.h - 2*BORDER;
1436 col = xw.bufw / xw.cw;
1437 row = xw.bufh / xw.ch;
1438 tresize(col, row);
1439 ttyresize(col, row);
1440 xw.bufh = MAX(1, xw.bufh);
1441 xw.bufw = MAX(1, xw.bufw);
1442 XFreePixmap(xw.dis, xw.buf);
1443 xw.buf = XCreatePixmap(xw.dis, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dis, xw.scr));
1444 }
1445
1446 void
1447 run(void) {
1448 XEvent ev;
1449 fd_set rfd;
1450 int xfd = XConnectionNumber(xw.dis);
1451
1452 for(;;) {
1453 FD_ZERO(&rfd);
1454 FD_SET(cmdfd, &rfd);
1455 FD_SET(xfd, &rfd);
1456 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, NULL) < 0) {
1457 if(errno == EINTR)
1458 continue;
1459 die("select failed: %s\n", SERRNO);
1460 }
1461 if(FD_ISSET(cmdfd, &rfd)) {
1462 ttyread();
1463 draw(SCREEN_UPDATE);
1464 }
1465 while(XPending(xw.dis)) {
1466 XNextEvent(xw.dis, &ev);
1467 if(handler[ev.type])
1468 (handler[ev.type])(&ev);
1469 }
1470 }
1471 }
1472
1473 int
1474 main(int argc, char *argv[]) {
1475 int i;
1476
1477 for(i = 1; i < argc; i++) {
1478 switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
1479 case 't':
1480 if(++i < argc) opt_title = argv[i];
1481 break;
1482 case 'e':
1483 if(++i < argc) opt_cmd = argv[i];
1484 break;
1485 case 'v':
1486 default:
1487 die(USAGE);
1488 }
1489 }
1490 setlocale(LC_CTYPE, "");
1491 tnew(80, 24);
1492 ttynew();
1493 xinit();
1494 selinit();
1495 run();
1496 return 0;
1497 }