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[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 XIM xim;
111 XIC xic;
112 int scr;
113 int w; /* window width */
114 int h; /* window height */
115 int bufw; /* pixmap width */
116 int bufh; /* pixmap height */
117 int ch; /* char height */
118 int cw; /* char width */
119 int focus;
120 int vis; /* is visible */
121 } XWindow;
122
123 typedef struct {
124 KeySym k;
125 char s[ESC_BUF_SIZ];
126 } Key;
127
128 /* Drawing Context */
129 typedef struct {
130 unsigned long col[256];
131 XFontStruct* font;
132 XFontStruct* bfont;
133 GC gc;
134 } DC;
135
136 /* TODO: use better name for vars... */
137 typedef struct {
138 int mode;
139 int bx, by;
140 int ex, ey;
141 struct {int x, y;} b, e;
142 char *clip;
143 } Selection;
144
145 #include "config.h"
146
147 static void die(const char *errstr, ...);
148 static void draw(int);
149 static void execsh(void);
150 static void sigchld(int);
151 static void run(void);
152
153 static void csidump(void);
154 static void csihandle(void);
155 static void csiparse(void);
156 static void csireset(void);
157
158 static void tclearregion(int, int, int, int);
159 static void tcursor(int);
160 static void tdeletechar(int);
161 static void tdeleteline(int);
162 static void tinsertblank(int);
163 static void tinsertblankline(int);
164 static void tmoveto(int, int);
165 static void tnew(int, int);
166 static void tnewline(void);
167 static void tputtab(void);
168 static void tputc(char);
169 static void tputs(char*, int);
170 static void treset(void);
171 static void tresize(int, int);
172 static void tscrollup(int, int);
173 static void tscrolldown(int, int);
174 static void tsetattr(int*, int);
175 static void tsetchar(char);
176 static void tsetscroll(int, int);
177 static void tswapscreen(void);
178
179 static void ttynew(void);
180 static void ttyread(void);
181 static void ttyresize(int, int);
182 static void ttywrite(const char *, size_t);
183
184 static void xdraws(char *, Glyph, int, int, int);
185 static void xhints(void);
186 static void xclear(int, int, int, int);
187 static void xdrawcursor(void);
188 static void xinit(void);
189 static void xloadcols(void);
190 static void xseturgency(int);
191
192 static void expose(XEvent *);
193 static void visibility(XEvent *);
194 static void unmap(XEvent *);
195 static char* kmap(KeySym);
196 static void kpress(XEvent *);
197 static void resize(XEvent *);
198 static void focus(XEvent *);
199 static void brelease(XEvent *);
200 static void bpress(XEvent *);
201 static void bmotion(XEvent *);
202
203
204 static void (*handler[LASTEvent])(XEvent *) = {
205 [KeyPress] = kpress,
206 [ConfigureNotify] = resize,
207 [VisibilityNotify] = visibility,
208 [UnmapNotify] = unmap,
209 [Expose] = expose,
210 [FocusIn] = focus,
211 [FocusOut] = focus,
212 [MotionNotify] = bmotion,
213 [ButtonPress] = bpress,
214 [ButtonRelease] = brelease,
215 };
216
217 /* Globals */
218 static DC dc;
219 static XWindow xw;
220 static Term term;
221 static CSIEscape escseq;
222 static int cmdfd;
223 static pid_t pid;
224 static Selection sel;
225 static char *opt_cmd = NULL;
226 static char *opt_title = NULL;
227
228 void
229 selinit(void) {
230 sel.mode = 0;
231 sel.bx = -1;
232 sel.clip = NULL;
233 }
234
235 static inline int selected(int x, int y) {
236 if(sel.ey == y && sel.by == y) {
237 int bx = MIN(sel.bx, sel.ex);
238 int ex = MAX(sel.bx, sel.ex);
239 return BETWEEN(x, bx, ex);
240 }
241 return ((sel.b.y < y&&y < sel.e.y) || (y==sel.e.y && x<=sel.e.x))
242 || (y==sel.b.y && x>=sel.b.x && (x<=sel.e.x || sel.b.y!=sel.e.y));
243 }
244
245 static void getbuttoninfo(XEvent *e, int *b, int *x, int *y) {
246 if(b)
247 *b = e->xbutton.button;
248
249 *x = e->xbutton.x/xw.cw;
250 *y = e->xbutton.y/xw.ch;
251 sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
252 sel.b.y = MIN(sel.by, sel.ey);
253 sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
254 sel.e.y = MAX(sel.by, sel.ey);
255 }
256
257 static void bpress(XEvent *e) {
258 sel.mode = 1;
259 sel.ex = sel.bx = e->xbutton.x/xw.cw;
260 sel.ey = sel.by = e->xbutton.y/xw.ch;
261 }
262
263 static char *getseltext() {
264 char *str, *ptr;
265 int ls, x, y, sz;
266 if(sel.bx == -1)
267 return NULL;
268 sz = (term.col+1) * (sel.e.y-sel.b.y+1);
269 ptr = str = malloc(sz);
270 for(y = 0; y < term.row; y++) {
271 for(x = 0; x < term.col; x++)
272 if(term.line[y][x].state & GLYPH_SET && (ls = selected(x, y)))
273 *ptr = term.line[y][x].c, ptr++;
274 if(ls)
275 *ptr = '\n', ptr++;
276 }
277 *ptr = 0;
278 return str;
279 }
280
281 /* TODO: use X11 clipboard */
282 static void selcopy(char *str) {
283 free(sel.clip);
284 sel.clip = str;
285 }
286
287 static void selpaste() {
288 if(sel.clip)
289 ttywrite(sel.clip, strlen(sel.clip));
290 }
291
292 /* TODO: doubleclick to select word */
293 static void brelease(XEvent *e) {
294 int b;
295 sel.mode = 0;
296 getbuttoninfo(e, &b, &sel.ex, &sel.ey);
297 if(sel.bx==sel.ex && sel.by==sel.ey) {
298 sel.bx = -1;
299 if(b==2)
300 selpaste();
301 } else {
302 if(b==1)
303 selcopy(getseltext());
304 }
305 draw(1);
306 }
307
308 static void bmotion(XEvent *e) {
309 if (sel.mode) {
310 getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
311 draw(1);
312 }
313 }
314
315 #ifdef DEBUG
316 void
317 tdump(void) {
318 int row, col;
319 Glyph c;
320
321 for(row = 0; row < term.row; row++) {
322 for(col = 0; col < term.col; col++) {
323 if(col == term.c.x && row == term.c.y)
324 putchar('#');
325 else {
326 c = term.line[row][col];
327 putchar(c.state & GLYPH_SET ? c.c : '.');
328 }
329 }
330 putchar('\n');
331 }
332 }
333 #endif
334
335 void
336 die(const char *errstr, ...) {
337 va_list ap;
338
339 va_start(ap, errstr);
340 vfprintf(stderr, errstr, ap);
341 va_end(ap);
342 exit(EXIT_FAILURE);
343 }
344
345 void
346 execsh(void) {
347 char *args[] = {getenv("SHELL"), "-i", NULL};
348 if(opt_cmd)
349 args[0] = opt_cmd, args[1] = NULL;
350 else
351 DEFAULT(args[0], SHELL);
352 putenv("TERM="TNAME);
353 execvp(args[0], args);
354 }
355
356 void
357 sigchld(int a) {
358 int stat = 0;
359 if(waitpid(pid, &stat, 0) < 0)
360 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
361 if(WIFEXITED(stat))
362 exit(WEXITSTATUS(stat));
363 else
364 exit(EXIT_FAILURE);
365 }
366
367 void
368 ttynew(void) {
369 int m, s;
370
371 /* seems to work fine on linux, openbsd and freebsd */
372 struct winsize w = {term.row, term.col, 0, 0};
373 if(openpty(&m, &s, NULL, NULL, &w) < 0)
374 die("openpty failed: %s\n", SERRNO);
375
376 switch(pid = fork()) {
377 case -1:
378 die("fork failed\n");
379 break;
380 case 0:
381 setsid(); /* create a new process group */
382 dup2(s, STDIN_FILENO);
383 dup2(s, STDOUT_FILENO);
384 dup2(s, STDERR_FILENO);
385 if(ioctl(s, TIOCSCTTY, NULL) < 0)
386 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
387 close(s);
388 close(m);
389 execsh();
390 break;
391 default:
392 close(s);
393 cmdfd = m;
394 signal(SIGCHLD, sigchld);
395 }
396 }
397
398 void
399 dump(char c) {
400 static int col;
401 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
402 if(++col % 10 == 0)
403 fprintf(stderr, "\n");
404 }
405
406 void
407 ttyread(void) {
408 char buf[BUFSIZ];
409 int ret;
410
411 if((ret = read(cmdfd, buf, LEN(buf))) < 0)
412 die("Couldn't read from shell: %s\n", SERRNO);
413 else
414 tputs(buf, ret);
415 }
416
417 void
418 ttywrite(const char *s, size_t n) {
419 if(write(cmdfd, s, n) == -1)
420 die("write error on tty: %s\n", SERRNO);
421 }
422
423 void
424 ttyresize(int x, int y) {
425 struct winsize w;
426
427 w.ws_row = term.row;
428 w.ws_col = term.col;
429 w.ws_xpixel = w.ws_ypixel = 0;
430 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
431 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
432 }
433
434 void
435 tcursor(int mode) {
436 static TCursor c;
437
438 if(mode == CURSOR_SAVE)
439 c = term.c;
440 else if(mode == CURSOR_LOAD)
441 term.c = c, tmoveto(c.x, c.y);
442 }
443
444 void
445 treset(void) {
446 term.c = (TCursor){{
447 .mode = ATTR_NULL,
448 .fg = DefaultFG,
449 .bg = DefaultBG
450 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
451
452 term.top = 0, term.bot = term.row - 1;
453 term.mode = MODE_WRAP;
454 tclearregion(0, 0, term.col-1, term.row-1);
455 }
456
457 void
458 tnew(int col, int row) {
459 /* set screen size */
460 term.row = row, term.col = col;
461 term.line = malloc(term.row * sizeof(Line));
462 term.alt = malloc(term.row * sizeof(Line));
463 for(row = 0 ; row < term.row; row++) {
464 term.line[row] = malloc(term.col * sizeof(Glyph));
465 term.alt [row] = malloc(term.col * sizeof(Glyph));
466 }
467 /* setup screen */
468 treset();
469 }
470
471 void
472 tswapscreen(void) {
473 Line* tmp = term.line;
474 term.line = term.alt;
475 term.alt = tmp;
476 term.mode ^= MODE_ALTSCREEN;
477 }
478
479 void
480 tscrolldown(int orig, int n) {
481 int i;
482 Line temp;
483
484 LIMIT(n, 0, term.bot-orig+1);
485
486 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
487
488 for(i = term.bot; i >= orig+n; i--) {
489 temp = term.line[i];
490 term.line[i] = term.line[i-n];
491 term.line[i-n] = temp;
492 }
493 }
494
495 void
496 tscrollup(int orig, int n) {
497 int i;
498 Line temp;
499 LIMIT(n, 0, term.bot-orig+1);
500
501 tclearregion(0, orig, term.col-1, orig+n-1);
502
503 for(i = orig; i <= term.bot-n; i++) {
504 temp = term.line[i];
505 term.line[i] = term.line[i+n];
506 term.line[i+n] = temp;
507 }
508 }
509
510 void
511 tnewline(void) {
512 int y = term.c.y;
513 if(term.c.y == term.bot)
514 tscrollup(term.top, 1);
515 else
516 y++;
517 tmoveto(0, y);
518 }
519
520 void
521 csiparse(void) {
522 /* int noarg = 1; */
523 char *p = escseq.buf;
524
525 escseq.narg = 0;
526 if(*p == '?')
527 escseq.priv = 1, p++;
528
529 while(p < escseq.buf+escseq.len) {
530 while(isdigit(*p)) {
531 escseq.arg[escseq.narg] *= 10;
532 escseq.arg[escseq.narg] += *p++ - '0'/*, noarg = 0 */;
533 }
534 if(*p == ';' && escseq.narg+1 < ESC_ARG_SIZ)
535 escseq.narg++, p++;
536 else {
537 escseq.mode = *p;
538 escseq.narg++;
539 return;
540 }
541 }
542 }
543
544 void
545 tmoveto(int x, int y) {
546 LIMIT(x, 0, term.col-1);
547 LIMIT(y, 0, term.row-1);
548 term.c.state &= ~CURSOR_WRAPNEXT;
549 term.c.x = x;
550 term.c.y = y;
551 }
552
553 void
554 tsetchar(char c) {
555 term.line[term.c.y][term.c.x] = term.c.attr;
556 term.line[term.c.y][term.c.x].c = c;
557 term.line[term.c.y][term.c.x].state |= GLYPH_SET;
558 }
559
560 void
561 tclearregion(int x1, int y1, int x2, int y2) {
562 int y, temp;
563
564 if(x1 > x2)
565 temp = x1, x1 = x2, x2 = temp;
566 if(y1 > y2)
567 temp = y1, y1 = y2, y2 = temp;
568
569 LIMIT(x1, 0, term.col-1);
570 LIMIT(x2, 0, term.col-1);
571 LIMIT(y1, 0, term.row-1);
572 LIMIT(y2, 0, term.row-1);
573
574 for(y = y1; y <= y2; y++)
575 memset(&term.line[y][x1], 0, sizeof(Glyph)*(x2-x1+1));
576 }
577
578 void
579 tdeletechar(int n) {
580 int src = term.c.x + n;
581 int dst = term.c.x;
582 int size = term.col - src;
583
584 if(src >= 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(term.col-n, term.c.y, term.col-1, term.c.y);
590 }
591
592 void
593 tinsertblank(int n) {
594 int src = term.c.x;
595 int dst = src + n;
596 int size = term.col - dst;
597
598 if(dst >= term.col) {
599 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
600 return;
601 }
602 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
603 tclearregion(src, term.c.y, dst - 1, term.c.y);
604 }
605
606 void
607 tinsertblankline(int n) {
608 if(term.c.y < term.top || term.c.y > term.bot)
609 return;
610
611 tscrolldown(term.c.y, n);
612 }
613
614 void
615 tdeleteline(int n) {
616 if(term.c.y < term.top || term.c.y > term.bot)
617 return;
618
619 tscrollup(term.c.y, n);
620 }
621
622 void
623 tsetattr(int *attr, int l) {
624 int i;
625
626 for(i = 0; i < l; i++) {
627 switch(attr[i]) {
628 case 0:
629 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD);
630 term.c.attr.fg = DefaultFG;
631 term.c.attr.bg = DefaultBG;
632 break;
633 case 1:
634 term.c.attr.mode |= ATTR_BOLD;
635 break;
636 case 4:
637 term.c.attr.mode |= ATTR_UNDERLINE;
638 break;
639 case 7:
640 term.c.attr.mode |= ATTR_REVERSE;
641 break;
642 case 22:
643 term.c.attr.mode &= ~ATTR_BOLD;
644 break;
645 case 24:
646 term.c.attr.mode &= ~ATTR_UNDERLINE;
647 break;
648 case 27:
649 term.c.attr.mode &= ~ATTR_REVERSE;
650 break;
651 case 38:
652 if (i + 2 < l && attr[i + 1] == 5) {
653 i += 2;
654 if (BETWEEN(attr[i], 0, 255))
655 term.c.attr.fg = attr[i];
656 else
657 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[i]);
658 }
659 else
660 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
661 break;
662 case 39:
663 term.c.attr.fg = DefaultFG;
664 break;
665 case 48:
666 if (i + 2 < l && attr[i + 1] == 5) {
667 i += 2;
668 if (BETWEEN(attr[i], 0, 255))
669 term.c.attr.bg = attr[i];
670 else
671 fprintf(stderr, "erresc: bad bgcolor %d\n", attr[i]);
672 }
673 else
674 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
675 break;
676 case 49:
677 term.c.attr.bg = DefaultBG;
678 break;
679 default:
680 if(BETWEEN(attr[i], 30, 37))
681 term.c.attr.fg = attr[i] - 30;
682 else if(BETWEEN(attr[i], 40, 47))
683 term.c.attr.bg = attr[i] - 40;
684 else if(BETWEEN(attr[i], 90, 97))
685 term.c.attr.fg = attr[i] - 90 + 8;
686 else if(BETWEEN(attr[i], 100, 107))
687 term.c.attr.fg = attr[i] - 100 + 8;
688 else
689 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]), csidump();
690
691 break;
692 }
693 }
694 }
695
696 void
697 tsetscroll(int t, int b) {
698 int temp;
699
700 LIMIT(t, 0, term.row-1);
701 LIMIT(b, 0, term.row-1);
702 if(t > b) {
703 temp = t;
704 t = b;
705 b = temp;
706 }
707 term.top = t;
708 term.bot = b;
709 }
710
711 void
712 csihandle(void) {
713 switch(escseq.mode) {
714 default:
715 unknown:
716 printf("erresc: unknown csi ");
717 csidump();
718 /* die(""); */
719 break;
720 case '@': /* ICH -- Insert <n> blank char */
721 DEFAULT(escseq.arg[0], 1);
722 tinsertblank(escseq.arg[0]);
723 break;
724 case 'A': /* CUU -- Cursor <n> Up */
725 case 'e':
726 DEFAULT(escseq.arg[0], 1);
727 tmoveto(term.c.x, term.c.y-escseq.arg[0]);
728 break;
729 case 'B': /* CUD -- Cursor <n> Down */
730 DEFAULT(escseq.arg[0], 1);
731 tmoveto(term.c.x, term.c.y+escseq.arg[0]);
732 break;
733 case 'C': /* CUF -- Cursor <n> Forward */
734 case 'a':
735 DEFAULT(escseq.arg[0], 1);
736 tmoveto(term.c.x+escseq.arg[0], term.c.y);
737 break;
738 case 'D': /* CUB -- Cursor <n> Backward */
739 DEFAULT(escseq.arg[0], 1);
740 tmoveto(term.c.x-escseq.arg[0], term.c.y);
741 break;
742 case 'E': /* CNL -- Cursor <n> Down and first col */
743 DEFAULT(escseq.arg[0], 1);
744 tmoveto(0, term.c.y+escseq.arg[0]);
745 break;
746 case 'F': /* CPL -- Cursor <n> Up and first col */
747 DEFAULT(escseq.arg[0], 1);
748 tmoveto(0, term.c.y-escseq.arg[0]);
749 break;
750 case 'G': /* CHA -- Move to <col> */
751 case '`': /* XXX: HPA -- same? */
752 DEFAULT(escseq.arg[0], 1);
753 tmoveto(escseq.arg[0]-1, term.c.y);
754 break;
755 case 'H': /* CUP -- Move to <row> <col> */
756 case 'f': /* XXX: HVP -- same? */
757 DEFAULT(escseq.arg[0], 1);
758 DEFAULT(escseq.arg[1], 1);
759 tmoveto(escseq.arg[1]-1, escseq.arg[0]-1);
760 break;
761 /* XXX: (CSI n I) CHT -- Cursor Forward Tabulation <n> tab stops */
762 case 'J': /* ED -- Clear screen */
763 switch(escseq.arg[0]) {
764 case 0: /* below */
765 tclearregion(term.c.x, term.c.y, term.col-1, term.row-1);
766 break;
767 case 1: /* above */
768 tclearregion(0, 0, term.c.x, term.c.y);
769 break;
770 case 2: /* all */
771 tclearregion(0, 0, term.col-1, term.row-1);
772 break;
773 default:
774 goto unknown;
775 }
776 break;
777 case 'K': /* EL -- Clear line */
778 switch(escseq.arg[0]) {
779 case 0: /* right */
780 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
781 break;
782 case 1: /* left */
783 tclearregion(0, term.c.y, term.c.x, term.c.y);
784 break;
785 case 2: /* all */
786 tclearregion(0, term.c.y, term.col-1, term.c.y);
787 break;
788 }
789 break;
790 case 'S': /* SU -- Scroll <n> line up */
791 DEFAULT(escseq.arg[0], 1);
792 tscrollup(term.top, escseq.arg[0]);
793 break;
794 case 'T': /* SD -- Scroll <n> line down */
795 DEFAULT(escseq.arg[0], 1);
796 tscrolldown(term.top, escseq.arg[0]);
797 break;
798 case 'L': /* IL -- Insert <n> blank lines */
799 DEFAULT(escseq.arg[0], 1);
800 tinsertblankline(escseq.arg[0]);
801 break;
802 case 'l': /* RM -- Reset Mode */
803 if(escseq.priv) {
804 switch(escseq.arg[0]) {
805 case 1:
806 term.mode &= ~MODE_APPKEYPAD;
807 break;
808 case 5: /* TODO: DECSCNM -- Remove reverse video */
809 break;
810 case 7:
811 term.mode &= ~MODE_WRAP;
812 break;
813 case 12: /* att610 -- Stop blinking cursor (IGNORED) */
814 break;
815 case 25:
816 term.c.state |= CURSOR_HIDE;
817 break;
818 case 1049: /* = 1047 and 1048 */
819 case 1047:
820 if(IS_SET(MODE_ALTSCREEN)) {
821 tclearregion(0, 0, term.col-1, term.row-1);
822 tswapscreen();
823 }
824 if(escseq.arg[0] == 1047)
825 break;
826 case 1048:
827 tcursor(CURSOR_LOAD);
828 break;
829 default:
830 goto unknown;
831 }
832 } else {
833 switch(escseq.arg[0]) {
834 case 4:
835 term.mode &= ~MODE_INSERT;
836 break;
837 default:
838 goto unknown;
839 }
840 }
841 break;
842 case 'M': /* DL -- Delete <n> lines */
843 DEFAULT(escseq.arg[0], 1);
844 tdeleteline(escseq.arg[0]);
845 break;
846 case 'X': /* ECH -- Erase <n> char */
847 DEFAULT(escseq.arg[0], 1);
848 tclearregion(term.c.x, term.c.y, term.c.x + escseq.arg[0], term.c.y);
849 break;
850 case 'P': /* DCH -- Delete <n> char */
851 DEFAULT(escseq.arg[0], 1);
852 tdeletechar(escseq.arg[0]);
853 break;
854 /* XXX: (CSI n Z) CBT -- Cursor Backward Tabulation <n> tab stops */
855 case 'd': /* VPA -- Move to <row> */
856 DEFAULT(escseq.arg[0], 1);
857 tmoveto(term.c.x, escseq.arg[0]-1);
858 break;
859 case 'h': /* SM -- Set terminal mode */
860 if(escseq.priv) {
861 switch(escseq.arg[0]) {
862 case 1:
863 term.mode |= MODE_APPKEYPAD;
864 break;
865 case 5: /* DECSCNM -- Reverve video */
866 /* TODO: set REVERSE on the whole screen (f) */
867 break;
868 case 7:
869 term.mode |= MODE_WRAP;
870 break;
871 case 12: /* att610 -- Start blinking cursor (IGNORED) */
872 /* fallthrough for xterm cvvis = CSI [ ? 12 ; 25 h */
873 if(escseq.narg > 1 && escseq.arg[1] != 25)
874 break;
875 case 25:
876 term.c.state &= ~CURSOR_HIDE;
877 break;
878 case 1049: /* = 1047 and 1048 */
879 case 1047:
880 if(IS_SET(MODE_ALTSCREEN))
881 tclearregion(0, 0, term.col-1, term.row-1);
882 else
883 tswapscreen();
884 if(escseq.arg[0] == 1047)
885 break;
886 case 1048:
887 tcursor(CURSOR_SAVE);
888 break;
889 default: goto unknown;
890 }
891 } else {
892 switch(escseq.arg[0]) {
893 case 4:
894 term.mode |= MODE_INSERT;
895 break;
896 default: goto unknown;
897 }
898 };
899 break;
900 case 'm': /* SGR -- Terminal attribute (color) */
901 tsetattr(escseq.arg, escseq.narg);
902 break;
903 case 'r': /* DECSTBM -- Set Scrolling Region */
904 if(escseq.priv)
905 goto unknown;
906 else {
907 DEFAULT(escseq.arg[0], 1);
908 DEFAULT(escseq.arg[1], term.row);
909 tsetscroll(escseq.arg[0]-1, escseq.arg[1]-1);
910 tmoveto(0, 0);
911 }
912 break;
913 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
914 tcursor(CURSOR_SAVE);
915 break;
916 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
917 tcursor(CURSOR_LOAD);
918 break;
919 }
920 }
921
922 void
923 csidump(void) {
924 int i;
925 printf("ESC [ %s", escseq.priv ? "? " : "");
926 if(escseq.narg)
927 for(i = 0; i < escseq.narg; i++)
928 printf("%d ", escseq.arg[i]);
929 if(escseq.mode)
930 putchar(escseq.mode);
931 putchar('\n');
932 }
933
934 void
935 csireset(void) {
936 memset(&escseq, 0, sizeof(escseq));
937 }
938
939 void
940 tputtab(void) {
941 int space = TAB - term.c.x % TAB;
942 tmoveto(term.c.x + space, term.c.y);
943 }
944
945 void
946 tputc(char c) {
947 if(term.esc & ESC_START) {
948 if(term.esc & ESC_CSI) {
949 escseq.buf[escseq.len++] = c;
950 if(BETWEEN(c, 0x40, 0x7E) || escseq.len >= ESC_BUF_SIZ) {
951 term.esc = 0;
952 csiparse(), csihandle();
953 }
954 /* TODO: handle other OSC */
955 } else if(term.esc & ESC_OSC) {
956 if(c == ';') {
957 term.titlelen = 0;
958 term.esc = ESC_START | ESC_TITLE;
959 }
960 } else if(term.esc & ESC_TITLE) {
961 if(c == '\a' || term.titlelen+1 >= ESC_TITLE_SIZ) {
962 term.esc = 0;
963 term.title[term.titlelen] = '\0';
964 XStoreName(xw.dis, xw.win, term.title);
965 } else {
966 term.title[term.titlelen++] = c;
967 }
968 } else if(term.esc & ESC_ALTCHARSET) {
969 switch(c) {
970 case '0': /* Line drawing crap */
971 term.c.attr.mode |= ATTR_GFX;
972 break;
973 case 'B': /* Back to regular text */
974 term.c.attr.mode &= ~ATTR_GFX;
975 break;
976 default:
977 printf("esc unhandled charset: ESC ( %c\n", c);
978 }
979 term.esc = 0;
980 } else {
981 switch(c) {
982 case '[':
983 term.esc |= ESC_CSI;
984 break;
985 case ']':
986 term.esc |= ESC_OSC;
987 break;
988 case '(':
989 term.esc |= ESC_ALTCHARSET;
990 break;
991 case 'D': /* IND -- Linefeed */
992 if(term.c.y == term.bot)
993 tscrollup(term.top, 1);
994 else
995 tmoveto(term.c.x, term.c.y+1);
996 term.esc = 0;
997 break;
998 case 'E': /* NEL -- Next line */
999 tnewline();
1000 term.esc = 0;
1001 break;
1002 case 'M': /* RI -- Reverse index */
1003 if(term.c.y == term.top)
1004 tscrolldown(term.top, 1);
1005 else
1006 tmoveto(term.c.x, term.c.y-1);
1007 term.esc = 0;
1008 break;
1009 case 'c': /* RIS -- Reset to inital state */
1010 treset();
1011 term.esc = 0;
1012 break;
1013 case '=': /* DECPAM -- Application keypad */
1014 term.mode |= MODE_APPKEYPAD;
1015 term.esc = 0;
1016 break;
1017 case '>': /* DECPNM -- Normal keypad */
1018 term.mode &= ~MODE_APPKEYPAD;
1019 term.esc = 0;
1020 break;
1021 case '7': /* DECSC -- Save Cursor */
1022 tcursor(CURSOR_SAVE);
1023 term.esc = 0;
1024 break;
1025 case '8': /* DECRC -- Restore Cursor */
1026 tcursor(CURSOR_LOAD);
1027 term.esc = 0;
1028 break;
1029 default:
1030 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n", c, isprint(c)?c:'.');
1031 term.esc = 0;
1032 }
1033 }
1034 } else {
1035 switch(c) {
1036 case '\t':
1037 tputtab();
1038 break;
1039 case '\b':
1040 tmoveto(term.c.x-1, term.c.y);
1041 break;
1042 case '\r':
1043 tmoveto(0, term.c.y);
1044 break;
1045 case '\n':
1046 tnewline();
1047 break;
1048 case '\a':
1049 if(!xw.focus)
1050 xseturgency(1);
1051 break;
1052 case '\033':
1053 csireset();
1054 term.esc = ESC_START;
1055 break;
1056 default:
1057 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
1058 tnewline();
1059 tsetchar(c);
1060 if(term.c.x+1 < term.col)
1061 tmoveto(term.c.x+1, term.c.y);
1062 else
1063 term.c.state |= CURSOR_WRAPNEXT;
1064 break;
1065 }
1066 }
1067 }
1068
1069 void
1070 tputs(char *s, int len) {
1071 for(; len > 0; len--)
1072 tputc(*s++);
1073 }
1074
1075 void
1076 tresize(int col, int row) {
1077 int i;
1078 int minrow = MIN(row, term.row);
1079 int mincol = MIN(col, term.col);
1080 int slide = term.c.y - row + 1;
1081
1082 if(col < 1 || row < 1)
1083 return;
1084
1085 /* free unneeded rows */
1086 i = 0;
1087 if(slide > 0) {
1088 /* slide screen to keep cursor where we expect it -
1089 * tscrollup would work here, but we can optimize to
1090 * memmove because we're freeing the earlier lines */
1091 for(/* i = 0 */; i < slide; i++) {
1092 free(term.line[i]);
1093 free(term.alt[i]);
1094 }
1095 memmove(term.line, term.line + slide, row * sizeof(Line));
1096 memmove(term.alt, term.alt + slide, row * sizeof(Line));
1097 }
1098 for(i += row; i < term.row; i++) {
1099 free(term.line[i]);
1100 free(term.alt[i]);
1101 }
1102
1103 /* resize to new height */
1104 term.line = realloc(term.line, row * sizeof(Line));
1105 term.alt = realloc(term.alt, row * sizeof(Line));
1106
1107 /* resize each row to new width, zero-pad if needed */
1108 for(i = 0; i < minrow; i++) {
1109 term.line[i] = realloc(term.line[i], col * sizeof(Glyph));
1110 term.alt[i] = realloc(term.alt[i], col * sizeof(Glyph));
1111 memset(term.line[i] + mincol, 0, (col - mincol) * sizeof(Glyph));
1112 memset(term.alt[i] + mincol, 0, (col - mincol) * sizeof(Glyph));
1113 }
1114
1115 /* allocate any new rows */
1116 for(/* i == minrow */; i < row; i++) {
1117 term.line[i] = calloc(col, sizeof(Glyph));
1118 term.alt [i] = calloc(col, sizeof(Glyph));
1119 }
1120
1121 /* update terminal size */
1122 term.col = col, term.row = row;
1123 /* make use of the LIMIT in tmoveto */
1124 tmoveto(term.c.x, term.c.y);
1125 /* reset scrolling region */
1126 tsetscroll(0, row-1);
1127 }
1128
1129 void
1130 xloadcols(void) {
1131 int i, r, g, b;
1132 XColor color;
1133 unsigned long white = WhitePixel(xw.dis, xw.scr);
1134
1135 for(i = 0; i < 16; i++) {
1136 if (!XAllocNamedColor(xw.dis, xw.cmap, colorname[i], &color, &color)) {
1137 dc.col[i] = white;
1138 fprintf(stderr, "Could not allocate color '%s'\n", colorname[i]);
1139 } else
1140 dc.col[i] = color.pixel;
1141 }
1142
1143 /* same colors as xterm */
1144 for(r = 0; r < 6; r++)
1145 for(g = 0; g < 6; g++)
1146 for(b = 0; b < 6; b++) {
1147 color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
1148 color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
1149 color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
1150 if (!XAllocColor(xw.dis, xw.cmap, &color)) {
1151 dc.col[i] = white;
1152 fprintf(stderr, "Could not allocate color %d\n", i);
1153 } else
1154 dc.col[i] = color.pixel;
1155 i++;
1156 }
1157
1158 for(r = 0; r < 24; r++, i++) {
1159 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
1160 if (!XAllocColor(xw.dis, xw.cmap, &color)) {
1161 dc.col[i] = white;
1162 fprintf(stderr, "Could not allocate color %d\n", i);
1163 } else
1164 dc.col[i] = color.pixel;
1165 }
1166 }
1167
1168 void
1169 xclear(int x1, int y1, int x2, int y2) {
1170 XSetForeground(xw.dis, dc.gc, dc.col[DefaultBG]);
1171 XFillRectangle(xw.dis, xw.buf, dc.gc,
1172 x1 * xw.cw, y1 * xw.ch,
1173 (x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch);
1174 }
1175
1176 void
1177 xhints(void)
1178 {
1179 XClassHint class = {TNAME, TNAME};
1180 XWMHints wm = {.flags = InputHint, .input = 1};
1181 XSizeHints size = {
1182 .flags = PSize | PResizeInc | PBaseSize,
1183 .height = xw.h,
1184 .width = xw.w,
1185 .height_inc = xw.ch,
1186 .width_inc = xw.cw,
1187 .base_height = 2*BORDER,
1188 .base_width = 2*BORDER,
1189 };
1190 XSetWMProperties(xw.dis, xw.win, NULL, NULL, NULL, 0, &size, &wm, &class);
1191 }
1192
1193 void
1194 xinit(void) {
1195 XSetWindowAttributes attrs;
1196
1197 if(!(xw.dis = XOpenDisplay(NULL)))
1198 die("Can't open display\n");
1199 xw.scr = XDefaultScreen(xw.dis);
1200
1201 /* font */
1202 if(!(dc.font = XLoadQueryFont(xw.dis, FONT)) || !(dc.bfont = XLoadQueryFont(xw.dis, BOLDFONT)))
1203 die("Can't load font %s\n", dc.font ? BOLDFONT : FONT);
1204
1205 /* XXX: Assuming same size for bold font */
1206 xw.cw = dc.font->max_bounds.rbearing - dc.font->min_bounds.lbearing;
1207 xw.ch = dc.font->ascent + dc.font->descent;
1208
1209 /* colors */
1210 xw.cmap = XDefaultColormap(xw.dis, xw.scr);
1211 xloadcols();
1212
1213 /* window - default size */
1214 xw.bufh = 24 * xw.ch;
1215 xw.bufw = 80 * xw.cw;
1216 xw.h = xw.bufh + 2*BORDER;
1217 xw.w = xw.bufw + 2*BORDER;
1218
1219 attrs.background_pixel = dc.col[DefaultBG];
1220 attrs.border_pixel = dc.col[DefaultBG];
1221 attrs.bit_gravity = NorthWestGravity;
1222 attrs.event_mask = FocusChangeMask | KeyPressMask
1223 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
1224 | PointerMotionMask | ButtonPressMask | ButtonReleaseMask;
1225 attrs.colormap = xw.cmap;
1226
1227 xw.win = XCreateWindow(xw.dis, XRootWindow(xw.dis, xw.scr), 0, 0,
1228 xw.w, xw.h, 0, XDefaultDepth(xw.dis, xw.scr), InputOutput,
1229 XDefaultVisual(xw.dis, xw.scr),
1230 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
1231 | CWColormap,
1232 &attrs);
1233 xw.buf = XCreatePixmap(xw.dis, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dis, xw.scr));
1234
1235
1236 /* input methods */
1237 xw.xim = XOpenIM(xw.dis, NULL, NULL, NULL);
1238 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
1239 | XIMStatusNothing, XNClientWindow, xw.win,
1240 XNFocusWindow, xw.win, NULL);
1241 /* gc */
1242 dc.gc = XCreateGC(xw.dis, xw.win, 0, NULL);
1243
1244 XMapWindow(xw.dis, xw.win);
1245 xhints();
1246 XStoreName(xw.dis, xw.win, opt_title ? opt_title : "st");
1247 XSync(xw.dis, 0);
1248 }
1249
1250 void
1251 xdraws(char *s, Glyph base, int x, int y, int len) {
1252 unsigned long xfg, xbg;
1253 int winx = x*xw.cw, winy = y*xw.ch + dc.font->ascent, width = len*xw.cw;
1254 int i;
1255
1256 if(base.mode & ATTR_REVERSE)
1257 xfg = dc.col[base.bg], xbg = dc.col[base.fg];
1258 else
1259 xfg = dc.col[base.fg], xbg = dc.col[base.bg];
1260
1261 XSetBackground(xw.dis, dc.gc, xbg);
1262 XSetForeground(xw.dis, dc.gc, xfg);
1263
1264 if(base.mode & ATTR_GFX)
1265 for(i = 0; i < len; i++) {
1266 char c = gfx[(unsigned int)s[i] % 256];
1267 if(c)
1268 s[i] = c;
1269 else if(s[i] > 0x5f)
1270 s[i] -= 0x5f;
1271 }
1272
1273 XSetFont(xw.dis, dc.gc, base.mode & ATTR_BOLD ? dc.bfont->fid : dc.font->fid);
1274 XDrawImageString(xw.dis, xw.buf, dc.gc, winx, winy, s, len);
1275
1276 if(base.mode & ATTR_UNDERLINE)
1277 XDrawLine(xw.dis, xw.buf, dc.gc, winx, winy+1, winx+width-1, winy+1);
1278 }
1279
1280 void
1281 xdrawcursor(void) {
1282 static int oldx = 0;
1283 static int oldy = 0;
1284 Glyph g = {' ', ATTR_NULL, DefaultBG, DefaultCS, 0};
1285
1286 LIMIT(oldx, 0, term.col-1);
1287 LIMIT(oldy, 0, term.row-1);
1288
1289 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
1290 g.c = term.line[term.c.y][term.c.x].c;
1291
1292 /* remove the old cursor */
1293 if(term.line[oldy][oldx].state & GLYPH_SET)
1294 xdraws(&term.line[oldy][oldx].c, term.line[oldy][oldx], oldx, oldy, 1);
1295 else
1296 xclear(oldx, oldy, oldx, oldy);
1297
1298 /* draw the new one */
1299 if(!(term.c.state & CURSOR_HIDE) && xw.focus) {
1300 xdraws(&g.c, g, term.c.x, term.c.y, 1);
1301 oldx = term.c.x, oldy = term.c.y;
1302 }
1303 }
1304
1305 #ifdef DEBUG
1306 /* basic drawing routines */
1307 void
1308 xdrawc(int x, int y, Glyph g) {
1309 XRectangle r = { x * xw.cw, y * xw.ch, xw.cw, xw.ch };
1310 XSetBackground(xw.dis, dc.gc, dc.col[g.bg]);
1311 XSetForeground(xw.dis, dc.gc, dc.col[g.fg]);
1312 XSetFont(xw.dis, dc.gc, g.mode & ATTR_BOLD ? dc.bfont->fid : dc.font->fid);
1313 XDrawImageString(xw.dis, xw.buf, dc.gc, r.x, r.y+dc.font->ascent, &g.c, 1);
1314 }
1315
1316 void
1317 draw(int dummy) {
1318 int x, y;
1319
1320 xclear(0, 0, term.col-1, term.row-1);
1321 for(y = 0; y < term.row; y++)
1322 for(x = 0; x < term.col; x++)
1323 if(term.line[y][x].state & GLYPH_SET)
1324 xdrawc(x, y, term.line[y][x]);
1325
1326 xdrawcursor();
1327 XCopyArea(xw.dis, xw.buf, xw.win, dc.gc, 0, 0, xw.bufw, xw.bufh, BORDER, BORDER);
1328 XFlush(xw.dis);
1329 }
1330
1331 #else
1332 /* optimized drawing routine */
1333 void
1334 draw(int redraw_all) {
1335 int i, x, y, ox;
1336 Glyph base, new;
1337 char buf[DRAW_BUF_SIZ];
1338
1339 if(!xw.vis)
1340 return;
1341
1342 xclear(0, 0, term.col-1, term.row-1);
1343 for(y = 0; y < term.row; y++) {
1344 base = term.line[y][0];
1345 i = ox = 0;
1346 for(x = 0; x < term.col; x++) {
1347 new = term.line[y][x];
1348 if(sel.bx!=-1 && new.c && selected(x, y))
1349 new.mode ^= ATTR_REVERSE;
1350 if(i > 0 && (!(new.state & GLYPH_SET) || ATTRCMP(base, new) ||
1351 i >= DRAW_BUF_SIZ)) {
1352 xdraws(buf, base, ox, y, i);
1353 i = 0;
1354 }
1355 if(new.state & GLYPH_SET) {
1356 if(i == 0) {
1357 ox = x;
1358 base = new;
1359 }
1360 buf[i++] = new.c;
1361 }
1362 }
1363 if(i > 0)
1364 xdraws(buf, base, ox, y, i);
1365 }
1366 xdrawcursor();
1367 XCopyArea(xw.dis, xw.buf, xw.win, dc.gc, 0, 0, xw.bufw, xw.bufh, BORDER, BORDER);
1368 XFlush(xw.dis);
1369 }
1370
1371 #endif
1372
1373 void
1374 expose(XEvent *ev) {
1375 draw(SCREEN_REDRAW);
1376 }
1377
1378 void
1379 visibility(XEvent *ev) {
1380 XVisibilityEvent *e = &ev->xvisibility;
1381 /* XXX if this goes from 0 to 1, need a full redraw for next Expose,
1382 * not just a buf copy */
1383 xw.vis = e->state != VisibilityFullyObscured;
1384 }
1385
1386 void
1387 unmap(XEvent *ev) {
1388 xw.vis = 0;
1389 }
1390
1391 void
1392 xseturgency(int add) {
1393 XWMHints *h = XGetWMHints(xw.dis, xw.win);
1394 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
1395 XSetWMHints(xw.dis, xw.win, h);
1396 XFree(h);
1397 }
1398
1399 void
1400 focus(XEvent *ev) {
1401 if((xw.focus = ev->type == FocusIn))
1402 xseturgency(0);
1403 draw(SCREEN_UPDATE);
1404 }
1405
1406 char*
1407 kmap(KeySym k) {
1408 int i;
1409 for(i = 0; i < LEN(key); i++)
1410 if(key[i].k == k)
1411 return (char*)key[i].s;
1412 return NULL;
1413 }
1414
1415 void
1416 kpress(XEvent *ev) {
1417 XKeyEvent *e = &ev->xkey;
1418 KeySym ksym;
1419 char buf[32];
1420 char *customkey;
1421 int len;
1422 int meta;
1423 int shift;
1424 Status status;
1425
1426 meta = e->state & Mod1Mask;
1427 shift = e->state & ShiftMask;
1428 len = XmbLookupString(xw.xic, e, buf, sizeof(buf), &ksym, &status);
1429
1430 if((customkey = kmap(ksym)))
1431 ttywrite(customkey, strlen(customkey));
1432 else if(len > 0) {
1433 buf[sizeof(buf)-1] = '\0';
1434 if(meta && len == 1)
1435 ttywrite("\033", 1);
1436 ttywrite(buf, len);
1437 } else
1438 switch(ksym) {
1439 case XK_Up:
1440 case XK_Down:
1441 case XK_Left:
1442 case XK_Right:
1443 sprintf(buf, "\033%c%c", IS_SET(MODE_APPKEYPAD) ? 'O' : '[', "DACB"[ksym - XK_Left]);
1444 ttywrite(buf, 3);
1445 break;
1446 case XK_Insert:
1447 if(shift)
1448 selpaste(), draw(1);
1449 break;
1450 default:
1451 fprintf(stderr, "errkey: %d\n", (int)ksym);
1452 break;
1453 }
1454 }
1455
1456 void
1457 resize(XEvent *e) {
1458 int col, row;
1459
1460 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
1461 return;
1462
1463 xw.w = e->xconfigure.width;
1464 xw.h = e->xconfigure.height;
1465 xw.bufw = xw.w - 2*BORDER;
1466 xw.bufh = xw.h - 2*BORDER;
1467 col = xw.bufw / xw.cw;
1468 row = xw.bufh / xw.ch;
1469 tresize(col, row);
1470 ttyresize(col, row);
1471 xw.bufh = MAX(1, xw.bufh);
1472 xw.bufw = MAX(1, xw.bufw);
1473 XFreePixmap(xw.dis, xw.buf);
1474 xw.buf = XCreatePixmap(xw.dis, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dis, xw.scr));
1475 }
1476
1477 void
1478 run(void) {
1479 XEvent ev;
1480 fd_set rfd;
1481 int xfd = XConnectionNumber(xw.dis);
1482
1483 for(;;) {
1484 FD_ZERO(&rfd);
1485 FD_SET(cmdfd, &rfd);
1486 FD_SET(xfd, &rfd);
1487 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, NULL) < 0) {
1488 if(errno == EINTR)
1489 continue;
1490 die("select failed: %s\n", SERRNO);
1491 }
1492 if(FD_ISSET(cmdfd, &rfd)) {
1493 ttyread();
1494 draw(SCREEN_UPDATE);
1495 }
1496 while(XPending(xw.dis)) {
1497 XNextEvent(xw.dis, &ev);
1498 if (XFilterEvent(&ev, xw.win))
1499 continue;
1500 if(handler[ev.type])
1501 (handler[ev.type])(&ev);
1502 }
1503 }
1504 }
1505
1506 int
1507 main(int argc, char *argv[]) {
1508 int i;
1509
1510 for(i = 1; i < argc; i++) {
1511 switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
1512 case 't':
1513 if(++i < argc) opt_title = argv[i];
1514 break;
1515 case 'e':
1516 if(++i < argc) opt_cmd = argv[i];
1517 break;
1518 case 'v':
1519 default:
1520 die(USAGE);
1521 }
1522 }
1523 setlocale(LC_CTYPE, "");
1524 tnew(80, 24);
1525 ttynew();
1526 xinit();
1527 selinit();
1528 run();
1529 return 0;
1530 }