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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) *b = e->xbutton.state,
247 *b=*b==4096?5:*b==2048?4:*b==1024?3:*b==512?2:*b==256?1:-1;
248 *x = e->xbutton.x/xw.cw;
249 *y = e->xbutton.y/xw.ch;
250 sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
251 sel.b.y = MIN(sel.by, sel.ey);
252 sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
253 sel.e.y = MAX(sel.by, sel.ey);
254 }
255
256 static void bpress(XEvent *e) {
257 sel.mode = 1;
258 sel.ex = sel.bx = e->xbutton.x/xw.cw;
259 sel.ey = sel.by = e->xbutton.y/xw.ch;
260 }
261
262 static char *getseltext() {
263 char *str, *ptr;
264 int ls, x, y, sz;
265 if(sel.bx == -1)
266 return NULL;
267 sz = (term.col+1) * (sel.e.y-sel.b.y+1);
268 ptr = str = malloc(sz);
269 for(y = 0; y < term.row; y++) {
270 for(x = 0; x < term.col; x++)
271 if(term.line[y][x].state & GLYPH_SET && (ls = selected(x, y)))
272 *ptr = term.line[y][x].c, ptr++;
273 if(ls)
274 *ptr = '\n', ptr++;
275 }
276 *ptr = 0;
277 return str;
278 }
279
280 /* TODO: use X11 clipboard */
281 static void selcopy(char *str) {
282 free(sel.clip);
283 sel.clip = str;
284 }
285
286 static void selpaste() {
287 if(sel.clip)
288 ttywrite(sel.clip, strlen(sel.clip));
289 }
290
291 /* TODO: doubleclick to select word */
292 static void brelease(XEvent *e) {
293 int b;
294 sel.mode = 0;
295 getbuttoninfo(e, &b, &sel.ex, &sel.ey);
296 if(sel.bx==sel.ex && sel.by==sel.ey) {
297 sel.bx = -1;
298 if(b==2)
299 selpaste();
300 } else {
301 if(b==1)
302 selcopy(getseltext());
303 }
304 draw(1);
305 }
306
307 static void bmotion(XEvent *e) {
308 if (sel.mode) {
309 getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
310 draw(1);
311 }
312 }
313
314 #ifdef DEBUG
315 void
316 tdump(void) {
317 int row, col;
318 Glyph c;
319
320 for(row = 0; row < term.row; row++) {
321 for(col = 0; col < term.col; col++) {
322 if(col == term.c.x && row == term.c.y)
323 putchar('#');
324 else {
325 c = term.line[row][col];
326 putchar(c.state & GLYPH_SET ? c.c : '.');
327 }
328 }
329 putchar('\n');
330 }
331 }
332 #endif
333
334 void
335 die(const char *errstr, ...) {
336 va_list ap;
337
338 va_start(ap, errstr);
339 vfprintf(stderr, errstr, ap);
340 va_end(ap);
341 exit(EXIT_FAILURE);
342 }
343
344 void
345 execsh(void) {
346 char *args[] = {getenv("SHELL"), "-i", NULL};
347 if(opt_cmd)
348 args[0] = opt_cmd, args[1] = NULL;
349 else
350 DEFAULT(args[0], SHELL);
351 putenv("TERM="TNAME);
352 execvp(args[0], args);
353 }
354
355 void
356 sigchld(int a) {
357 int stat = 0;
358 if(waitpid(pid, &stat, 0) < 0)
359 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
360 if(WIFEXITED(stat))
361 exit(WEXITSTATUS(stat));
362 else
363 exit(EXIT_FAILURE);
364 }
365
366 void
367 ttynew(void) {
368 int m, s;
369
370 /* seems to work fine on linux, openbsd and freebsd */
371 struct winsize w = {term.row, term.col, 0, 0};
372 if(openpty(&m, &s, NULL, NULL, &w) < 0)
373 die("openpty failed: %s\n", SERRNO);
374
375 switch(pid = fork()) {
376 case -1:
377 die("fork failed\n");
378 break;
379 case 0:
380 setsid(); /* create a new process group */
381 dup2(s, STDIN_FILENO);
382 dup2(s, STDOUT_FILENO);
383 dup2(s, STDERR_FILENO);
384 if(ioctl(s, TIOCSCTTY, NULL) < 0)
385 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
386 close(s);
387 close(m);
388 execsh();
389 break;
390 default:
391 close(s);
392 cmdfd = m;
393 signal(SIGCHLD, sigchld);
394 }
395 }
396
397 void
398 dump(char c) {
399 static int col;
400 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
401 if(++col % 10 == 0)
402 fprintf(stderr, "\n");
403 }
404
405 void
406 ttyread(void) {
407 char buf[BUFSIZ];
408 int ret;
409
410 if((ret = read(cmdfd, buf, LEN(buf))) < 0)
411 die("Couldn't read from shell: %s\n", SERRNO);
412 else
413 tputs(buf, ret);
414 }
415
416 void
417 ttywrite(const char *s, size_t n) {
418 if(write(cmdfd, s, n) == -1)
419 die("write error on tty: %s\n", SERRNO);
420 }
421
422 void
423 ttyresize(int x, int y) {
424 struct winsize w;
425
426 w.ws_row = term.row;
427 w.ws_col = term.col;
428 w.ws_xpixel = w.ws_ypixel = 0;
429 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
430 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
431 }
432
433 void
434 tcursor(int mode) {
435 static TCursor c;
436
437 if(mode == CURSOR_SAVE)
438 c = term.c;
439 else if(mode == CURSOR_LOAD)
440 term.c = c, tmoveto(c.x, c.y);
441 }
442
443 void
444 treset(void) {
445 term.c = (TCursor){{
446 .mode = ATTR_NULL,
447 .fg = DefaultFG,
448 .bg = DefaultBG
449 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
450
451 term.top = 0, term.bot = term.row - 1;
452 term.mode = MODE_WRAP;
453 tclearregion(0, 0, term.col-1, term.row-1);
454 }
455
456 void
457 tnew(int col, int row) {
458 /* set screen size */
459 term.row = row, term.col = col;
460 term.line = malloc(term.row * sizeof(Line));
461 term.alt = malloc(term.row * sizeof(Line));
462 for(row = 0 ; row < term.row; row++) {
463 term.line[row] = malloc(term.col * sizeof(Glyph));
464 term.alt [row] = malloc(term.col * sizeof(Glyph));
465 }
466 /* setup screen */
467 treset();
468 }
469
470 void
471 tswapscreen(void) {
472 Line* tmp = term.line;
473 term.line = term.alt;
474 term.alt = tmp;
475 term.mode ^= MODE_ALTSCREEN;
476 }
477
478 void
479 tscrolldown(int orig, int n) {
480 int i;
481 Line temp;
482
483 LIMIT(n, 0, term.bot-orig+1);
484
485 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
486
487 for(i = term.bot; i >= orig+n; i--) {
488 temp = term.line[i];
489 term.line[i] = term.line[i-n];
490 term.line[i-n] = temp;
491 }
492 }
493
494 void
495 tscrollup(int orig, int n) {
496 int i;
497 Line temp;
498 LIMIT(n, 0, term.bot-orig+1);
499
500 tclearregion(0, orig, term.col-1, orig+n-1);
501
502 for(i = orig; i <= term.bot-n; i++) {
503 temp = term.line[i];
504 term.line[i] = term.line[i+n];
505 term.line[i+n] = temp;
506 }
507 }
508
509 void
510 tnewline(void) {
511 int y = term.c.y;
512 if(term.c.y == term.bot)
513 tscrollup(term.top, 1);
514 else
515 y++;
516 tmoveto(0, y);
517 }
518
519 void
520 csiparse(void) {
521 /* int noarg = 1; */
522 char *p = escseq.buf;
523
524 escseq.narg = 0;
525 if(*p == '?')
526 escseq.priv = 1, p++;
527
528 while(p < escseq.buf+escseq.len) {
529 while(isdigit(*p)) {
530 escseq.arg[escseq.narg] *= 10;
531 escseq.arg[escseq.narg] += *p++ - '0'/*, noarg = 0 */;
532 }
533 if(*p == ';' && escseq.narg+1 < ESC_ARG_SIZ)
534 escseq.narg++, p++;
535 else {
536 escseq.mode = *p;
537 escseq.narg++;
538 return;
539 }
540 }
541 }
542
543 void
544 tmoveto(int x, int y) {
545 LIMIT(x, 0, term.col-1);
546 LIMIT(y, 0, term.row-1);
547 term.c.state &= ~CURSOR_WRAPNEXT;
548 term.c.x = x;
549 term.c.y = y;
550 }
551
552 void
553 tsetchar(char c) {
554 term.line[term.c.y][term.c.x] = term.c.attr;
555 term.line[term.c.y][term.c.x].c = c;
556 term.line[term.c.y][term.c.x].state |= GLYPH_SET;
557 }
558
559 void
560 tclearregion(int x1, int y1, int x2, int y2) {
561 int y, temp;
562
563 if(x1 > x2)
564 temp = x1, x1 = x2, x2 = temp;
565 if(y1 > y2)
566 temp = y1, y1 = y2, y2 = temp;
567
568 LIMIT(x1, 0, term.col-1);
569 LIMIT(x2, 0, term.col-1);
570 LIMIT(y1, 0, term.row-1);
571 LIMIT(y2, 0, term.row-1);
572
573 for(y = y1; y <= y2; y++)
574 memset(&term.line[y][x1], 0, sizeof(Glyph)*(x2-x1+1));
575 }
576
577 void
578 tdeletechar(int n) {
579 int src = term.c.x + n;
580 int dst = term.c.x;
581 int size = term.col - src;
582
583 if(src >= term.col) {
584 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
585 return;
586 }
587 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
588 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
589 }
590
591 void
592 tinsertblank(int n) {
593 int src = term.c.x;
594 int dst = src + n;
595 int size = term.col - dst;
596
597 if(dst >= term.col) {
598 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
599 return;
600 }
601 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
602 tclearregion(src, term.c.y, dst - 1, term.c.y);
603 }
604
605 void
606 tinsertblankline(int n) {
607 if(term.c.y < term.top || term.c.y > term.bot)
608 return;
609
610 tscrolldown(term.c.y, n);
611 }
612
613 void
614 tdeleteline(int n) {
615 if(term.c.y < term.top || term.c.y > term.bot)
616 return;
617
618 tscrollup(term.c.y, n);
619 }
620
621 void
622 tsetattr(int *attr, int l) {
623 int i;
624
625 for(i = 0; i < l; i++) {
626 switch(attr[i]) {
627 case 0:
628 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD);
629 term.c.attr.fg = DefaultFG;
630 term.c.attr.bg = DefaultBG;
631 break;
632 case 1:
633 term.c.attr.mode |= ATTR_BOLD;
634 break;
635 case 4:
636 term.c.attr.mode |= ATTR_UNDERLINE;
637 break;
638 case 7:
639 term.c.attr.mode |= ATTR_REVERSE;
640 break;
641 case 22:
642 term.c.attr.mode &= ~ATTR_BOLD;
643 break;
644 case 24:
645 term.c.attr.mode &= ~ATTR_UNDERLINE;
646 break;
647 case 27:
648 term.c.attr.mode &= ~ATTR_REVERSE;
649 break;
650 case 38:
651 if (i + 2 < l && attr[i + 1] == 5) {
652 i += 2;
653 if (BETWEEN(attr[i], 0, 255))
654 term.c.attr.fg = attr[i];
655 else
656 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[i]);
657 }
658 else
659 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
660 break;
661 case 39:
662 term.c.attr.fg = DefaultFG;
663 break;
664 case 48:
665 if (i + 2 < l && attr[i + 1] == 5) {
666 i += 2;
667 if (BETWEEN(attr[i], 0, 255))
668 term.c.attr.bg = attr[i];
669 else
670 fprintf(stderr, "erresc: bad bgcolor %d\n", attr[i]);
671 }
672 else
673 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
674 break;
675 case 49:
676 term.c.attr.bg = DefaultBG;
677 break;
678 default:
679 if(BETWEEN(attr[i], 30, 37))
680 term.c.attr.fg = attr[i] - 30;
681 else if(BETWEEN(attr[i], 40, 47))
682 term.c.attr.bg = attr[i] - 40;
683 else if(BETWEEN(attr[i], 90, 97))
684 term.c.attr.fg = attr[i] - 90 + 8;
685 else if(BETWEEN(attr[i], 100, 107))
686 term.c.attr.fg = attr[i] - 100 + 8;
687 else
688 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]), csidump();
689
690 break;
691 }
692 }
693 }
694
695 void
696 tsetscroll(int t, int b) {
697 int temp;
698
699 LIMIT(t, 0, term.row-1);
700 LIMIT(b, 0, term.row-1);
701 if(t > b) {
702 temp = t;
703 t = b;
704 b = temp;
705 }
706 term.top = t;
707 term.bot = b;
708 }
709
710 void
711 csihandle(void) {
712 switch(escseq.mode) {
713 default:
714 unknown:
715 printf("erresc: unknown csi ");
716 csidump();
717 /* die(""); */
718 break;
719 case '@': /* ICH -- Insert <n> blank char */
720 DEFAULT(escseq.arg[0], 1);
721 tinsertblank(escseq.arg[0]);
722 break;
723 case 'A': /* CUU -- Cursor <n> Up */
724 case 'e':
725 DEFAULT(escseq.arg[0], 1);
726 tmoveto(term.c.x, term.c.y-escseq.arg[0]);
727 break;
728 case 'B': /* CUD -- Cursor <n> Down */
729 DEFAULT(escseq.arg[0], 1);
730 tmoveto(term.c.x, term.c.y+escseq.arg[0]);
731 break;
732 case 'C': /* CUF -- Cursor <n> Forward */
733 case 'a':
734 DEFAULT(escseq.arg[0], 1);
735 tmoveto(term.c.x+escseq.arg[0], term.c.y);
736 break;
737 case 'D': /* CUB -- Cursor <n> Backward */
738 DEFAULT(escseq.arg[0], 1);
739 tmoveto(term.c.x-escseq.arg[0], term.c.y);
740 break;
741 case 'E': /* CNL -- Cursor <n> Down and first col */
742 DEFAULT(escseq.arg[0], 1);
743 tmoveto(0, term.c.y+escseq.arg[0]);
744 break;
745 case 'F': /* CPL -- Cursor <n> Up and first col */
746 DEFAULT(escseq.arg[0], 1);
747 tmoveto(0, term.c.y-escseq.arg[0]);
748 break;
749 case 'G': /* CHA -- Move to <col> */
750 case '`': /* XXX: HPA -- same? */
751 DEFAULT(escseq.arg[0], 1);
752 tmoveto(escseq.arg[0]-1, term.c.y);
753 break;
754 case 'H': /* CUP -- Move to <row> <col> */
755 case 'f': /* XXX: HVP -- same? */
756 DEFAULT(escseq.arg[0], 1);
757 DEFAULT(escseq.arg[1], 1);
758 tmoveto(escseq.arg[1]-1, escseq.arg[0]-1);
759 break;
760 /* XXX: (CSI n I) CHT -- Cursor Forward Tabulation <n> tab stops */
761 case 'J': /* ED -- Clear screen */
762 switch(escseq.arg[0]) {
763 case 0: /* below */
764 tclearregion(term.c.x, term.c.y, term.col-1, term.row-1);
765 break;
766 case 1: /* above */
767 tclearregion(0, 0, term.c.x, term.c.y);
768 break;
769 case 2: /* all */
770 tclearregion(0, 0, term.col-1, term.row-1);
771 break;
772 default:
773 goto unknown;
774 }
775 break;
776 case 'K': /* EL -- Clear line */
777 switch(escseq.arg[0]) {
778 case 0: /* right */
779 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
780 break;
781 case 1: /* left */
782 tclearregion(0, term.c.y, term.c.x, term.c.y);
783 break;
784 case 2: /* all */
785 tclearregion(0, term.c.y, term.col-1, term.c.y);
786 break;
787 }
788 break;
789 case 'S': /* SU -- Scroll <n> line up */
790 DEFAULT(escseq.arg[0], 1);
791 tscrollup(term.top, escseq.arg[0]);
792 break;
793 case 'T': /* SD -- Scroll <n> line down */
794 DEFAULT(escseq.arg[0], 1);
795 tscrolldown(term.top, escseq.arg[0]);
796 break;
797 case 'L': /* IL -- Insert <n> blank lines */
798 DEFAULT(escseq.arg[0], 1);
799 tinsertblankline(escseq.arg[0]);
800 break;
801 case 'l': /* RM -- Reset Mode */
802 if(escseq.priv) {
803 switch(escseq.arg[0]) {
804 case 1:
805 term.mode &= ~MODE_APPKEYPAD;
806 break;
807 case 5: /* TODO: DECSCNM -- Remove reverse video */
808 break;
809 case 7:
810 term.mode &= ~MODE_WRAP;
811 break;
812 case 12: /* att610 -- Stop blinking cursor (IGNORED) */
813 break;
814 case 25:
815 term.c.state |= CURSOR_HIDE;
816 break;
817 case 1049: /* = 1047 and 1048 */
818 case 1047:
819 if(IS_SET(MODE_ALTSCREEN)) {
820 tclearregion(0, 0, term.col-1, term.row-1);
821 tswapscreen();
822 }
823 if(escseq.arg[0] == 1047)
824 break;
825 case 1048:
826 tcursor(CURSOR_LOAD);
827 break;
828 default:
829 goto unknown;
830 }
831 } else {
832 switch(escseq.arg[0]) {
833 case 4:
834 term.mode &= ~MODE_INSERT;
835 break;
836 default:
837 goto unknown;
838 }
839 }
840 break;
841 case 'M': /* DL -- Delete <n> lines */
842 DEFAULT(escseq.arg[0], 1);
843 tdeleteline(escseq.arg[0]);
844 break;
845 case 'X': /* ECH -- Erase <n> char */
846 DEFAULT(escseq.arg[0], 1);
847 tclearregion(term.c.x, term.c.y, term.c.x + escseq.arg[0], term.c.y);
848 break;
849 case 'P': /* DCH -- Delete <n> char */
850 DEFAULT(escseq.arg[0], 1);
851 tdeletechar(escseq.arg[0]);
852 break;
853 /* XXX: (CSI n Z) CBT -- Cursor Backward Tabulation <n> tab stops */
854 case 'd': /* VPA -- Move to <row> */
855 DEFAULT(escseq.arg[0], 1);
856 tmoveto(term.c.x, escseq.arg[0]-1);
857 break;
858 case 'h': /* SM -- Set terminal mode */
859 if(escseq.priv) {
860 switch(escseq.arg[0]) {
861 case 1:
862 term.mode |= MODE_APPKEYPAD;
863 break;
864 case 5: /* DECSCNM -- Reverve video */
865 /* TODO: set REVERSE on the whole screen (f) */
866 break;
867 case 7:
868 term.mode |= MODE_WRAP;
869 break;
870 case 12: /* att610 -- Start blinking cursor (IGNORED) */
871 /* fallthrough for xterm cvvis = CSI [ ? 12 ; 25 h */
872 if(escseq.narg > 1 && escseq.arg[1] != 25)
873 break;
874 case 25:
875 term.c.state &= ~CURSOR_HIDE;
876 break;
877 case 1049: /* = 1047 and 1048 */
878 case 1047:
879 if(IS_SET(MODE_ALTSCREEN))
880 tclearregion(0, 0, term.col-1, term.row-1);
881 else
882 tswapscreen();
883 if(escseq.arg[0] == 1047)
884 break;
885 case 1048:
886 tcursor(CURSOR_SAVE);
887 break;
888 default: goto unknown;
889 }
890 } else {
891 switch(escseq.arg[0]) {
892 case 4:
893 term.mode |= MODE_INSERT;
894 break;
895 default: goto unknown;
896 }
897 };
898 break;
899 case 'm': /* SGR -- Terminal attribute (color) */
900 tsetattr(escseq.arg, escseq.narg);
901 break;
902 case 'r': /* DECSTBM -- Set Scrolling Region */
903 if(escseq.priv)
904 goto unknown;
905 else {
906 DEFAULT(escseq.arg[0], 1);
907 DEFAULT(escseq.arg[1], term.row);
908 tsetscroll(escseq.arg[0]-1, escseq.arg[1]-1);
909 tmoveto(0, 0);
910 }
911 break;
912 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
913 tcursor(CURSOR_SAVE);
914 break;
915 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
916 tcursor(CURSOR_LOAD);
917 break;
918 }
919 }
920
921 void
922 csidump(void) {
923 int i;
924 printf("ESC [ %s", escseq.priv ? "? " : "");
925 if(escseq.narg)
926 for(i = 0; i < escseq.narg; i++)
927 printf("%d ", escseq.arg[i]);
928 if(escseq.mode)
929 putchar(escseq.mode);
930 putchar('\n');
931 }
932
933 void
934 csireset(void) {
935 memset(&escseq, 0, sizeof(escseq));
936 }
937
938 void
939 tputtab(void) {
940 int space = TAB - term.c.x % TAB;
941 tmoveto(term.c.x + space, term.c.y);
942 }
943
944 void
945 tputc(char c) {
946 if(term.esc & ESC_START) {
947 if(term.esc & ESC_CSI) {
948 escseq.buf[escseq.len++] = c;
949 if(BETWEEN(c, 0x40, 0x7E) || escseq.len >= ESC_BUF_SIZ) {
950 term.esc = 0;
951 csiparse(), csihandle();
952 }
953 /* TODO: handle other OSC */
954 } else if(term.esc & ESC_OSC) {
955 if(c == ';') {
956 term.titlelen = 0;
957 term.esc = ESC_START | ESC_TITLE;
958 }
959 } else if(term.esc & ESC_TITLE) {
960 if(c == '\a' || term.titlelen+1 >= ESC_TITLE_SIZ) {
961 term.esc = 0;
962 term.title[term.titlelen] = '\0';
963 XStoreName(xw.dis, xw.win, term.title);
964 } else {
965 term.title[term.titlelen++] = c;
966 }
967 } else if(term.esc & ESC_ALTCHARSET) {
968 switch(c) {
969 case '0': /* Line drawing crap */
970 term.c.attr.mode |= ATTR_GFX;
971 break;
972 case 'B': /* Back to regular text */
973 term.c.attr.mode &= ~ATTR_GFX;
974 break;
975 default:
976 printf("esc unhandled charset: ESC ( %c\n", c);
977 }
978 term.esc = 0;
979 } else {
980 switch(c) {
981 case '[':
982 term.esc |= ESC_CSI;
983 break;
984 case ']':
985 term.esc |= ESC_OSC;
986 break;
987 case '(':
988 term.esc |= ESC_ALTCHARSET;
989 break;
990 case 'D': /* IND -- Linefeed */
991 if(term.c.y == term.bot)
992 tscrollup(term.top, 1);
993 else
994 tmoveto(term.c.x, term.c.y+1);
995 term.esc = 0;
996 break;
997 case 'E': /* NEL -- Next line */
998 tnewline();
999 term.esc = 0;
1000 break;
1001 case 'M': /* RI -- Reverse index */
1002 if(term.c.y == term.top)
1003 tscrolldown(term.top, 1);
1004 else
1005 tmoveto(term.c.x, term.c.y-1);
1006 term.esc = 0;
1007 break;
1008 case 'c': /* RIS -- Reset to inital state */
1009 treset();
1010 term.esc = 0;
1011 break;
1012 case '=': /* DECPAM -- Application keypad */
1013 term.mode |= MODE_APPKEYPAD;
1014 term.esc = 0;
1015 break;
1016 case '>': /* DECPNM -- Normal keypad */
1017 term.mode &= ~MODE_APPKEYPAD;
1018 term.esc = 0;
1019 break;
1020 case '7': /* DECSC -- Save Cursor */
1021 tcursor(CURSOR_SAVE);
1022 term.esc = 0;
1023 break;
1024 case '8': /* DECRC -- Restore Cursor */
1025 tcursor(CURSOR_LOAD);
1026 term.esc = 0;
1027 break;
1028 default:
1029 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n", c, isprint(c)?c:'.');
1030 term.esc = 0;
1031 }
1032 }
1033 } else {
1034 switch(c) {
1035 case '\t':
1036 tputtab();
1037 break;
1038 case '\b':
1039 tmoveto(term.c.x-1, term.c.y);
1040 break;
1041 case '\r':
1042 tmoveto(0, term.c.y);
1043 break;
1044 case '\n':
1045 tnewline();
1046 break;
1047 case '\a':
1048 if(!xw.focus)
1049 xseturgency(1);
1050 break;
1051 case '\033':
1052 csireset();
1053 term.esc = ESC_START;
1054 break;
1055 default:
1056 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
1057 tnewline();
1058 tsetchar(c);
1059 if(term.c.x+1 < term.col)
1060 tmoveto(term.c.x+1, term.c.y);
1061 else
1062 term.c.state |= CURSOR_WRAPNEXT;
1063 break;
1064 }
1065 }
1066 }
1067
1068 void
1069 tputs(char *s, int len) {
1070 for(; len > 0; len--)
1071 tputc(*s++);
1072 }
1073
1074 void
1075 tresize(int col, int row) {
1076 int i;
1077 int minrow = MIN(row, term.row);
1078 int mincol = MIN(col, term.col);
1079 int slide = term.c.y - row + 1;
1080
1081 if(col < 1 || row < 1)
1082 return;
1083
1084 /* free unneeded rows */
1085 i = 0;
1086 if(slide > 0) {
1087 /* slide screen to keep cursor where we expect it -
1088 * tscrollup would work here, but we can optimize to
1089 * memmove because we're freeing the earlier lines */
1090 for(/* i = 0 */; i < slide; i++) {
1091 free(term.line[i]);
1092 free(term.alt[i]);
1093 }
1094 memmove(term.line, term.line + slide, row * sizeof(Line));
1095 memmove(term.alt, term.alt + slide, row * sizeof(Line));
1096 }
1097 for(i += row; i < term.row; i++) {
1098 free(term.line[i]);
1099 free(term.alt[i]);
1100 }
1101
1102 /* resize to new height */
1103 term.line = realloc(term.line, row * sizeof(Line));
1104 term.alt = realloc(term.alt, row * sizeof(Line));
1105
1106 /* resize each row to new width, zero-pad if needed */
1107 for(i = 0; i < minrow; i++) {
1108 term.line[i] = realloc(term.line[i], col * sizeof(Glyph));
1109 term.alt[i] = realloc(term.alt[i], col * sizeof(Glyph));
1110 memset(term.line[i] + mincol, 0, (col - mincol) * sizeof(Glyph));
1111 memset(term.alt[i] + mincol, 0, (col - mincol) * sizeof(Glyph));
1112 }
1113
1114 /* allocate any new rows */
1115 for(/* i == minrow */; i < row; i++) {
1116 term.line[i] = calloc(col, sizeof(Glyph));
1117 term.alt [i] = calloc(col, sizeof(Glyph));
1118 }
1119
1120 /* update terminal size */
1121 term.col = col, term.row = row;
1122 /* make use of the LIMIT in tmoveto */
1123 tmoveto(term.c.x, term.c.y);
1124 /* reset scrolling region */
1125 tsetscroll(0, row-1);
1126 }
1127
1128 void
1129 xloadcols(void) {
1130 int i, r, g, b;
1131 XColor color;
1132 unsigned long white = WhitePixel(xw.dis, xw.scr);
1133
1134 for(i = 0; i < 16; i++) {
1135 if (!XAllocNamedColor(xw.dis, xw.cmap, colorname[i], &color, &color)) {
1136 dc.col[i] = white;
1137 fprintf(stderr, "Could not allocate color '%s'\n", colorname[i]);
1138 } else
1139 dc.col[i] = color.pixel;
1140 }
1141
1142 /* same colors as xterm */
1143 for(r = 0; r < 6; r++)
1144 for(g = 0; g < 6; g++)
1145 for(b = 0; b < 6; b++) {
1146 color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
1147 color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
1148 color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
1149 if (!XAllocColor(xw.dis, xw.cmap, &color)) {
1150 dc.col[i] = white;
1151 fprintf(stderr, "Could not allocate color %d\n", i);
1152 } else
1153 dc.col[i] = color.pixel;
1154 i++;
1155 }
1156
1157 for(r = 0; r < 24; r++, i++) {
1158 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
1159 if (!XAllocColor(xw.dis, xw.cmap, &color)) {
1160 dc.col[i] = white;
1161 fprintf(stderr, "Could not allocate color %d\n", i);
1162 } else
1163 dc.col[i] = color.pixel;
1164 }
1165 }
1166
1167 void
1168 xclear(int x1, int y1, int x2, int y2) {
1169 XSetForeground(xw.dis, dc.gc, dc.col[DefaultBG]);
1170 XFillRectangle(xw.dis, xw.buf, dc.gc,
1171 x1 * xw.cw, y1 * xw.ch,
1172 (x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch);
1173 }
1174
1175 void
1176 xhints(void)
1177 {
1178 XClassHint class = {TNAME, TNAME};
1179 XWMHints wm = {.flags = InputHint, .input = 1};
1180 XSizeHints size = {
1181 .flags = PSize | PResizeInc | PBaseSize,
1182 .height = xw.h,
1183 .width = xw.w,
1184 .height_inc = xw.ch,
1185 .width_inc = xw.cw,
1186 .base_height = 2*BORDER,
1187 .base_width = 2*BORDER,
1188 };
1189 XSetWMProperties(xw.dis, xw.win, NULL, NULL, NULL, 0, &size, &wm, &class);
1190 }
1191
1192 void
1193 xinit(void) {
1194 XSetWindowAttributes attrs;
1195
1196 if(!(xw.dis = XOpenDisplay(NULL)))
1197 die("Can't open display\n");
1198 xw.scr = XDefaultScreen(xw.dis);
1199
1200 /* font */
1201 if(!(dc.font = XLoadQueryFont(xw.dis, FONT)) || !(dc.bfont = XLoadQueryFont(xw.dis, BOLDFONT)))
1202 die("Can't load font %s\n", dc.font ? BOLDFONT : FONT);
1203
1204 /* XXX: Assuming same size for bold font */
1205 xw.cw = dc.font->max_bounds.rbearing - dc.font->min_bounds.lbearing;
1206 xw.ch = dc.font->ascent + dc.font->descent;
1207
1208 /* colors */
1209 xw.cmap = XDefaultColormap(xw.dis, xw.scr);
1210 xloadcols();
1211
1212 /* window - default size */
1213 xw.bufh = 24 * xw.ch;
1214 xw.bufw = 80 * xw.cw;
1215 xw.h = xw.bufh + 2*BORDER;
1216 xw.w = xw.bufw + 2*BORDER;
1217
1218 attrs.background_pixel = dc.col[DefaultBG];
1219 attrs.border_pixel = dc.col[DefaultBG];
1220 attrs.bit_gravity = NorthWestGravity;
1221 attrs.event_mask = FocusChangeMask | KeyPressMask
1222 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
1223 | PointerMotionMask | ButtonPressMask | ButtonReleaseMask;
1224 attrs.colormap = xw.cmap;
1225
1226 xw.win = XCreateWindow(xw.dis, XRootWindow(xw.dis, xw.scr), 0, 0,
1227 xw.w, xw.h, 0, XDefaultDepth(xw.dis, xw.scr), InputOutput,
1228 XDefaultVisual(xw.dis, xw.scr),
1229 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
1230 | CWColormap,
1231 &attrs);
1232 xw.buf = XCreatePixmap(xw.dis, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dis, xw.scr));
1233
1234
1235 /* input methods */
1236 xw.xim = XOpenIM(xw.dis, NULL, NULL, NULL);
1237 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
1238 | XIMStatusNothing, XNClientWindow, xw.win,
1239 XNFocusWindow, xw.win, NULL);
1240 /* gc */
1241 dc.gc = XCreateGC(xw.dis, xw.win, 0, NULL);
1242
1243 XMapWindow(xw.dis, xw.win);
1244 xhints();
1245 XStoreName(xw.dis, xw.win, opt_title ? opt_title : "st");
1246 XSync(xw.dis, 0);
1247 }
1248
1249 void
1250 xdraws(char *s, Glyph base, int x, int y, int len) {
1251 unsigned long xfg, xbg;
1252 int winx = x*xw.cw, winy = y*xw.ch + dc.font->ascent, width = len*xw.cw;
1253 int i;
1254
1255 if(base.mode & ATTR_REVERSE)
1256 xfg = dc.col[base.bg], xbg = dc.col[base.fg];
1257 else
1258 xfg = dc.col[base.fg], xbg = dc.col[base.bg];
1259
1260 XSetBackground(xw.dis, dc.gc, xbg);
1261 XSetForeground(xw.dis, dc.gc, xfg);
1262
1263 if(base.mode & ATTR_GFX)
1264 for(i = 0; i < len; i++) {
1265 char c = gfx[(unsigned int)s[i] % 256];
1266 if(c)
1267 s[i] = c;
1268 else if(s[i] > 0x5f)
1269 s[i] -= 0x5f;
1270 }
1271
1272 XSetFont(xw.dis, dc.gc, base.mode & ATTR_BOLD ? dc.bfont->fid : dc.font->fid);
1273 XDrawImageString(xw.dis, xw.buf, dc.gc, winx, winy, s, len);
1274
1275 if(base.mode & ATTR_UNDERLINE)
1276 XDrawLine(xw.dis, xw.buf, dc.gc, winx, winy+1, winx+width-1, winy+1);
1277 }
1278
1279 void
1280 xdrawcursor(void) {
1281 static int oldx = 0;
1282 static int oldy = 0;
1283 Glyph g = {' ', ATTR_NULL, DefaultBG, DefaultCS, 0};
1284
1285 LIMIT(oldx, 0, term.col-1);
1286 LIMIT(oldy, 0, term.row-1);
1287
1288 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
1289 g.c = term.line[term.c.y][term.c.x].c;
1290
1291 /* remove the old cursor */
1292 if(term.line[oldy][oldx].state & GLYPH_SET)
1293 xdraws(&term.line[oldy][oldx].c, term.line[oldy][oldx], oldx, oldy, 1);
1294 else
1295 xclear(oldx, oldy, oldx, oldy);
1296
1297 /* draw the new one */
1298 if(!(term.c.state & CURSOR_HIDE) && xw.focus) {
1299 xdraws(&g.c, g, term.c.x, term.c.y, 1);
1300 oldx = term.c.x, oldy = term.c.y;
1301 }
1302 }
1303
1304 #ifdef DEBUG
1305 /* basic drawing routines */
1306 void
1307 xdrawc(int x, int y, Glyph g) {
1308 XRectangle r = { x * xw.cw, y * xw.ch, xw.cw, xw.ch };
1309 XSetBackground(xw.dis, dc.gc, dc.col[g.bg]);
1310 XSetForeground(xw.dis, dc.gc, dc.col[g.fg]);
1311 XSetFont(xw.dis, dc.gc, g.mode & ATTR_BOLD ? dc.bfont->fid : dc.font->fid);
1312 XDrawImageString(xw.dis, xw.buf, dc.gc, r.x, r.y+dc.font->ascent, &g.c, 1);
1313 }
1314
1315 void
1316 draw(int dummy) {
1317 int x, y;
1318
1319 xclear(0, 0, term.col-1, term.row-1);
1320 for(y = 0; y < term.row; y++)
1321 for(x = 0; x < term.col; x++)
1322 if(term.line[y][x].state & GLYPH_SET)
1323 xdrawc(x, y, term.line[y][x]);
1324
1325 xdrawcursor();
1326 XCopyArea(xw.dis, xw.buf, xw.win, dc.gc, 0, 0, xw.bufw, xw.bufh, BORDER, BORDER);
1327 XFlush(xw.dis);
1328 }
1329
1330 #else
1331 /* optimized drawing routine */
1332 void
1333 draw(int redraw_all) {
1334 int i, x, y, ox;
1335 Glyph base, new;
1336 char buf[DRAW_BUF_SIZ];
1337
1338 if(!xw.vis)
1339 return;
1340
1341 xclear(0, 0, term.col-1, term.row-1);
1342 for(y = 0; y < term.row; y++) {
1343 base = term.line[y][0];
1344 i = ox = 0;
1345 for(x = 0; x < term.col; x++) {
1346 new = term.line[y][x];
1347 if(sel.bx!=-1 && new.c && selected(x, y))
1348 new.mode ^= ATTR_REVERSE;
1349 if(i > 0 && (!(new.state & GLYPH_SET) || ATTRCMP(base, new) ||
1350 i >= DRAW_BUF_SIZ)) {
1351 xdraws(buf, base, ox, y, i);
1352 i = 0;
1353 }
1354 if(new.state & GLYPH_SET) {
1355 if(i == 0) {
1356 ox = x;
1357 base = new;
1358 }
1359 buf[i++] = new.c;
1360 }
1361 }
1362 if(i > 0)
1363 xdraws(buf, base, ox, y, i);
1364 }
1365 xdrawcursor();
1366 XCopyArea(xw.dis, xw.buf, xw.win, dc.gc, 0, 0, xw.bufw, xw.bufh, BORDER, BORDER);
1367 XFlush(xw.dis);
1368 }
1369
1370 #endif
1371
1372 void
1373 expose(XEvent *ev) {
1374 draw(SCREEN_REDRAW);
1375 }
1376
1377 void
1378 visibility(XEvent *ev) {
1379 XVisibilityEvent *e = &ev->xvisibility;
1380 /* XXX if this goes from 0 to 1, need a full redraw for next Expose,
1381 * not just a buf copy */
1382 xw.vis = e->state != VisibilityFullyObscured;
1383 }
1384
1385 void
1386 unmap(XEvent *ev) {
1387 xw.vis = 0;
1388 }
1389
1390 void
1391 xseturgency(int add) {
1392 XWMHints *h = XGetWMHints(xw.dis, xw.win);
1393 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
1394 XSetWMHints(xw.dis, xw.win, h);
1395 XFree(h);
1396 }
1397
1398 void
1399 focus(XEvent *ev) {
1400 if((xw.focus = ev->type == FocusIn))
1401 xseturgency(0);
1402 draw(SCREEN_UPDATE);
1403 }
1404
1405 char*
1406 kmap(KeySym k) {
1407 int i;
1408 for(i = 0; i < LEN(key); i++)
1409 if(key[i].k == k)
1410 return (char*)key[i].s;
1411 return NULL;
1412 }
1413
1414 void
1415 kpress(XEvent *ev) {
1416 XKeyEvent *e = &ev->xkey;
1417 KeySym ksym;
1418 char buf[32];
1419 char *customkey;
1420 int len;
1421 int meta;
1422 int shift;
1423 Status status;
1424
1425 meta = e->state & Mod1Mask;
1426 shift = e->state & ShiftMask;
1427 len = XmbLookupString(xw.xic, e, buf, sizeof(buf), &ksym, &status);
1428
1429 if((customkey = kmap(ksym)))
1430 ttywrite(customkey, strlen(customkey));
1431 else if(len > 0) {
1432 buf[sizeof(buf)-1] = '\0';
1433 if(meta && len == 1)
1434 ttywrite("\033", 1);
1435 ttywrite(buf, len);
1436 } else
1437 switch(ksym) {
1438 case XK_Up:
1439 case XK_Down:
1440 case XK_Left:
1441 case XK_Right:
1442 sprintf(buf, "\033%c%c", IS_SET(MODE_APPKEYPAD) ? 'O' : '[', "DACB"[ksym - XK_Left]);
1443 ttywrite(buf, 3);
1444 break;
1445 case XK_Insert:
1446 if(shift)
1447 selpaste(), draw(1);
1448 break;
1449 default:
1450 fprintf(stderr, "errkey: %d\n", (int)ksym);
1451 break;
1452 }
1453 }
1454
1455 void
1456 resize(XEvent *e) {
1457 int col, row;
1458
1459 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
1460 return;
1461
1462 xw.w = e->xconfigure.width;
1463 xw.h = e->xconfigure.height;
1464 xw.bufw = xw.w - 2*BORDER;
1465 xw.bufh = xw.h - 2*BORDER;
1466 col = xw.bufw / xw.cw;
1467 row = xw.bufh / xw.ch;
1468 tresize(col, row);
1469 ttyresize(col, row);
1470 xw.bufh = MAX(1, xw.bufh);
1471 xw.bufw = MAX(1, xw.bufw);
1472 XFreePixmap(xw.dis, xw.buf);
1473 xw.buf = XCreatePixmap(xw.dis, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dis, xw.scr));
1474 }
1475
1476 void
1477 run(void) {
1478 XEvent ev;
1479 fd_set rfd;
1480 int xfd = XConnectionNumber(xw.dis);
1481
1482 for(;;) {
1483 FD_ZERO(&rfd);
1484 FD_SET(cmdfd, &rfd);
1485 FD_SET(xfd, &rfd);
1486 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, NULL) < 0) {
1487 if(errno == EINTR)
1488 continue;
1489 die("select failed: %s\n", SERRNO);
1490 }
1491 if(FD_ISSET(cmdfd, &rfd)) {
1492 ttyread();
1493 draw(SCREEN_UPDATE);
1494 }
1495 while(XPending(xw.dis)) {
1496 XNextEvent(xw.dis, &ev);
1497 if (XFilterEvent(&ev, xw.win))
1498 continue;
1499 if(handler[ev.type])
1500 (handler[ev.type])(&ev);
1501 }
1502 }
1503 }
1504
1505 int
1506 main(int argc, char *argv[]) {
1507 int i;
1508
1509 for(i = 1; i < argc; i++) {
1510 switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
1511 case 't':
1512 if(++i < argc) opt_title = argv[i];
1513 break;
1514 case 'e':
1515 if(++i < argc) opt_cmd = argv[i];
1516 break;
1517 case 'v':
1518 default:
1519 die(USAGE);
1520 }
1521 }
1522 setlocale(LC_CTYPE, "");
1523 tnew(80, 24);
1524 ttynew();
1525 xinit();
1526 selinit();
1527 run();
1528 return 0;
1529 }