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fixed backspace problem, updated terminfo entry and moved TNAME in config.h.
[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 /* Arbitrary sizes */
24 #define ESC_TITLE_SIZ 256
25 #define ESC_BUF_SIZ 256
26 #define ESC_ARG_SIZ 16
27 #define DRAW_BUF_SIZ 1024
28
29 #define SERRNO strerror(errno)
30 #define MIN(a, b) ((a) < (b) ? (a) : (b))
31 #define MAX(a, b) ((a) < (b) ? (b) : (a))
32 #define LEN(a) (sizeof(a) / sizeof(a[0]))
33 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
34 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
35 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
36 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
37
38 /* Attribute, Cursor, Character state, Terminal mode, Screen draw mode */
39 enum { ATTR_NULL=0 , ATTR_REVERSE=1 , ATTR_UNDERLINE=2, ATTR_BOLD=4, ATTR_GFX=8 };
40 enum { CURSOR_UP, CURSOR_DOWN, CURSOR_LEFT, CURSOR_RIGHT, CURSOR_HIDE, CURSOR_DRAW,
41 CURSOR_SAVE, CURSOR_LOAD };
42 enum { GLYPH_SET=1, GLYPH_DIRTY=2 };
43 enum { MODE_WRAP=1, MODE_INSERT=2, MODE_APPKEYPAD=4 };
44 enum { ESC_START=1, ESC_CSI=2, ESC_OSC=4, ESC_TITLE=8, ESC_ALTCHARSET=16 };
45 enum { SCREEN_UPDATE, SCREEN_REDRAW };
46
47 typedef struct {
48 char c; /* character code */
49 char mode; /* attribute flags */
50 int fg; /* foreground */
51 int bg; /* background */
52 char state; /* state flags */
53 } Glyph;
54
55 typedef Glyph* Line;
56
57 typedef struct {
58 Glyph attr; /* current char attributes */
59 int x;
60 int y;
61 } TCursor;
62
63 /* CSI Escape sequence structs */
64 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
65 typedef struct {
66 char buf[ESC_BUF_SIZ]; /* raw string */
67 int len; /* raw string length */
68 char priv;
69 int arg[ESC_ARG_SIZ];
70 int narg; /* nb of args */
71 char mode;
72 } CSIEscape;
73
74 /* Internal representation of the screen */
75 typedef struct {
76 int row; /* nb row */
77 int col; /* nb col */
78 Line* line; /* screen */
79 TCursor c; /* cursor */
80 char hidec;
81 int top; /* top scroll limit */
82 int bot; /* bottom scroll limit */
83 int mode; /* terminal mode flags */
84 int esc; /* escape state flags */
85 char title[ESC_TITLE_SIZ];
86 int titlelen;
87 } Term;
88
89 /* Purely graphic info */
90 typedef struct {
91 Display* dis;
92 Window win;
93 Pixmap buf;
94 int scr;
95 int w; /* window width */
96 int h; /* window height */
97 int bufw; /* pixmap width */
98 int bufh; /* pixmap height */
99 int ch; /* char height */
100 int cw; /* char width */
101 } XWindow;
102
103 typedef struct {
104 KeySym k;
105 char s[ESC_BUF_SIZ];
106 } Key;
107
108 /* Drawing Context */
109 typedef struct {
110 unsigned long col[256];
111 XFontStruct* font;
112 XFontStruct* bfont;
113 GC gc;
114 } DC;
115
116 #include "config.h"
117
118 static void die(const char *errstr, ...);
119 static void draw(int);
120 static void execsh(void);
121 static void sigchld(int);
122 static void run(void);
123
124 static void csidump(void);
125 static void csihandle(void);
126 static void csiparse(void);
127 static void csireset(void);
128
129 static void tclearregion(int, int, int, int);
130 static void tcursor(int);
131 static void tmovecursor(int);
132 static void tdeletechar(int);
133 static void tdeleteline(int);
134 static void tinsertblank(int);
135 static void tinsertblankline(int);
136 static void tmoveto(int, int);
137 static void tnew(int, int);
138 static void tnewline(void);
139 static void tputc(char);
140 static void tputs(char*, int);
141 static void treset(void);
142 static void tresize(int, int);
143 static void tscroll(void);
144 static void tscrollup(int);
145 static void tscrolldown(int);
146 static void tsetattr(int*, int);
147 static void tsetchar(char);
148 static void tsetscroll(int, int);
149
150 static void ttynew(void);
151 static void ttyread(void);
152 static void ttyresize(int, int);
153 static void ttywrite(const char *, size_t);
154
155 static void xclear(int, int, int, int);
156 static void xcursor(int);
157 static void xinit(void);
158 static void xloadcols(void);
159
160 static void expose(XEvent *);
161 static char* kmap(KeySym);
162 static void kpress(XEvent *);
163 static void resize(XEvent *);
164
165 static void (*handler[LASTEvent])(XEvent *) = {
166 [KeyPress] = kpress,
167 [Expose] = expose,
168 [ConfigureNotify] = resize
169 };
170
171 /* Globals */
172 static DC dc;
173 static XWindow xw;
174 static Term term;
175 static CSIEscape escseq;
176 static int cmdfd;
177 static pid_t pid;
178 static int running;
179
180 #ifdef DEBUG
181 void
182 tdump(void) {
183 int row, col;
184 Glyph c;
185
186 for(row = 0; row < term.row; row++) {
187 for(col = 0; col < term.col; col++) {
188 if(col == term.c.x && row == term.c.y)
189 putchar('#');
190 else {
191 c = term.line[row][col];
192 putchar(c.state & GLYPH_SET ? c.c : '.');
193 }
194 }
195 putchar('\n');
196 }
197 }
198 #endif
199
200 void
201 die(const char *errstr, ...) {
202 va_list ap;
203
204 va_start(ap, errstr);
205 vfprintf(stderr, errstr, ap);
206 va_end(ap);
207 exit(EXIT_FAILURE);
208 }
209
210 void
211 execsh(void) {
212 char *args[3] = {getenv("SHELL"), "-i", NULL};
213 DEFAULT(args[0], "/bin/sh"); /* default shell if getenv() failed */
214 putenv("TERM=" TNAME);
215 execvp(args[0], args);
216 }
217
218 void
219 xbell(void) { /* visual bell */
220 XRectangle r = { BORDER, BORDER, xw.bufw, xw.bufh };
221 XSetForeground(xw.dis, dc.gc, dc.col[BellCol]);
222 XFillRectangles(xw.dis, xw.win, dc.gc, &r, 1);
223 /* usleep(30000); */
224 draw(SCREEN_REDRAW);
225 }
226
227 void
228 sigchld(int a) {
229 int stat = 0;
230 if(waitpid(pid, &stat, 0) < 0)
231 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
232 if(WIFEXITED(stat))
233 exit(WEXITSTATUS(stat));
234 else
235 exit(EXIT_FAILURE);
236 }
237
238 void
239 ttynew(void) {
240 int m, s;
241 char *pts;
242
243 if((m = posix_openpt(O_RDWR | O_NOCTTY)) < 0)
244 die("openpt failed: %s\n", SERRNO);
245 if(grantpt(m) < 0)
246 die("grandpt failed: %s\n", SERRNO);
247 if(unlockpt(m) < 0)
248 die("unlockpt failed: %s\n", SERRNO);
249 if(!(pts = ptsname(m)))
250 die("ptsname failed: %s\n", SERRNO);
251 if((s = open(pts, O_RDWR | O_NOCTTY)) < 0)
252 die("Couldn't open slave: %s\n", SERRNO);
253 fcntl(s, F_SETFL, O_NDELAY);
254 switch(pid = fork()) {
255 case -1:
256 die("fork failed\n");
257 break;
258 case 0:
259 setsid(); /* create a new process group */
260 dup2(s, STDIN_FILENO);
261 dup2(s, STDOUT_FILENO);
262 dup2(s, STDERR_FILENO);
263 if(ioctl(s, TIOCSCTTY, NULL) < 0)
264 die("ioctl TTIOCSTTY failed: %s\n", SERRNO);
265 execsh();
266 break;
267 default:
268 close(s);
269 cmdfd = m;
270 signal(SIGCHLD, sigchld);
271 }
272 }
273
274 void
275 dump(char c) {
276 static int col;
277 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
278 if(++col % 10 == 0)
279 fprintf(stderr, "\n");
280 }
281
282 void
283 ttyread(void) {
284 char buf[BUFSIZ] = {0};
285 int ret;
286
287 if((ret = read(cmdfd, buf, BUFSIZ)) < 0)
288 die("Couldn't read from shell: %s\n", SERRNO);
289 else
290 tputs(buf, ret);
291 }
292
293 void
294 ttywrite(const char *s, size_t n) {
295 if(write(cmdfd, s, n) == -1)
296 die("write error on tty: %s\n", SERRNO);
297 }
298
299 void
300 ttyresize(int x, int y) {
301 struct winsize w;
302
303 w.ws_row = term.row;
304 w.ws_col = term.col;
305 w.ws_xpixel = w.ws_ypixel = 0;
306 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
307 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
308 }
309
310 void
311 tcursor(int mode) {
312 static TCursor c;
313
314 if(mode == CURSOR_SAVE)
315 c = term.c;
316 else if(mode == CURSOR_LOAD)
317 term.c = c, tmoveto(c.x, c.y);
318 }
319
320 void
321 treset(void) {
322 term.c.attr.mode = ATTR_NULL;
323 term.c.attr.fg = DefaultFG;
324 term.c.attr.bg = DefaultBG;
325 term.c.x = term.c.y = 0;
326 term.hidec = 0;
327 term.top = 0, term.bot = term.row - 1;
328 term.mode = MODE_WRAP;
329 tclearregion(0, 0, term.col-1, term.row-1);
330 }
331
332 void
333 tnew(int col, int row) { /* screen size */
334 term.row = row, term.col = col;
335 term.top = 0, term.bot = term.row - 1;
336 /* mode */
337 term.mode = MODE_WRAP;
338 /* cursor */
339 term.c.attr.mode = ATTR_NULL;
340 term.c.attr.fg = DefaultFG;
341 term.c.attr.bg = DefaultBG;
342 term.c.x = term.c.y = 0;
343 term.hidec = 0;
344 /* allocate screen */
345 term.line = calloc(term.row, sizeof(Line));
346 for(row = 0 ; row < term.row; row++)
347 term.line[row] = calloc(term.col, sizeof(Glyph));
348 }
349
350 /* TODO: Replace with scrollup/scolldown */
351 void
352 tscroll(void) {
353 Line temp = term.line[term.top];
354 int i;
355
356 for(i = term.top; i < term.bot; i++)
357 term.line[i] = term.line[i+1];
358 memset(temp, 0, sizeof(Glyph) * term.col);
359 term.line[term.bot] = temp;
360 }
361
362 void
363 tscrolldown (int n) {
364 int i;
365 Line temp;
366
367 LIMIT(n, 0, term.bot-term.top+1);
368
369 for(i = 0; i < n; i++)
370 memset(term.line[term.bot-i], 0, term.col*sizeof(Glyph));
371
372 for(i = term.bot; i >= term.top+n; i--) {
373 temp = term.line[i];
374 term.line[i] = term.line[i-n];
375 term.line[i-n] = temp;
376 }
377 }
378
379 void
380 tscrollup (int n) {
381 int i;
382 Line temp;
383 LIMIT(n, 0, term.bot-term.top+1);
384
385 for(i = 0; i < n; i++)
386 memset(term.line[term.top+i], 0, term.col*sizeof(Glyph));
387
388 for(i = term.top; i <= term.bot-n; i++) {
389 temp = term.line[i];
390 term.line[i] = term.line[i+n];
391 term.line[i+n] = temp;
392 }
393 }
394
395 void
396 tnewline(void) {
397 int y = term.c.y + 1;
398 if(y > term.bot)
399 tscroll(), y = term.bot;
400 tmoveto(0, y);
401 }
402
403 void
404 csiparse(void) {
405 /* int noarg = 1; */
406 char *p = escseq.buf;
407
408 escseq.narg = 0;
409 if(*p == '?')
410 escseq.priv = 1, p++;
411
412 while(p < escseq.buf+escseq.len) {
413 while(isdigit(*p)) {
414 escseq.arg[escseq.narg] *= 10;
415 escseq.arg[escseq.narg] += *p++ - '0'/*, noarg = 0 */;
416 }
417 if(*p == ';' && escseq.narg+1 < ESC_ARG_SIZ)
418 escseq.narg++, p++;
419 else {
420 escseq.mode = *p;
421 escseq.narg++;
422 return;
423 }
424 }
425 }
426
427 void
428 tmoveto(int x, int y) {
429 term.c.x = x < 0 ? 0 : x >= term.col ? term.col-1 : x;
430 term.c.y = y < 0 ? 0 : y >= term.row ? term.row-1 : y;
431 }
432
433 void
434 tmovecursor(int dir) {
435 int xf = term.c.x, yf = term.c.y;
436
437 switch(dir) {
438 case CURSOR_UP:
439 yf--;
440 break;
441 case CURSOR_DOWN:
442 yf++;
443 break;
444 case CURSOR_LEFT:
445 xf--;
446 if(term.mode & MODE_WRAP && xf < 0) {
447 xf = term.col-1, yf--;
448 if(yf < term.top)
449 yf = term.top, xf = 0;
450 }
451 break;
452 case CURSOR_RIGHT:
453 xf++;
454 if(term.mode & MODE_WRAP && xf >= term.col) {
455 xf = 0, yf++;
456 if(yf > term.bot)
457 yf = term.bot, tscroll();
458 }
459 break;
460 }
461 tmoveto(xf, yf);
462 }
463
464 void
465 tsetchar(char c) {
466 term.line[term.c.y][term.c.x] = term.c.attr;
467 term.line[term.c.y][term.c.x].c = c;
468 term.line[term.c.y][term.c.x].state |= GLYPH_SET;
469 }
470
471 void
472 tclearregion(int x1, int y1, int x2, int y2) {
473 int y, temp;
474
475 if(x1 > x2)
476 temp = x1, x1 = x2, x2 = temp;
477 if(y1 > y2)
478 temp = y1, y1 = y2, y2 = temp;
479
480 LIMIT(x1, 0, term.col-1);
481 LIMIT(x2, 0, term.col-1);
482 LIMIT(y1, 0, term.row-1);
483 LIMIT(y2, 0, term.row-1);
484
485 for(y = y1; y <= y2; y++)
486 memset(&term.line[y][x1], 0, sizeof(Glyph)*(x2-x1+1));
487 }
488
489 void
490 tdeletechar(int n) {
491 int src = term.c.x + n;
492 int dst = term.c.x;
493 int size = term.col - src;
494
495 if(src >= term.col) {
496 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
497 return;
498 }
499 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
500 tclearregion(term.col-size, term.c.y, term.col-1, term.c.y);
501 }
502
503 void
504 tinsertblank(int n) {
505 int src = term.c.x;
506 int dst = src + n;
507 int size = term.col - n - src;
508
509 if(dst >= term.col) {
510 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
511 return;
512 }
513 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
514 tclearregion(src, term.c.y, dst, term.c.y);
515 }
516
517 void
518 tinsertblankline(int n) {
519 int i;
520 Line blank;
521 int bot = term.bot;
522
523 if(term.c.y > term.bot)
524 bot = term.row - 1;
525 else if(term.c.y < term.top)
526 bot = term.top - 1;
527 if(term.c.y + n >= bot) {
528 tclearregion(0, term.c.y, term.col-1, bot);
529 return;
530 }
531 for(i = bot; i >= term.c.y+n; i--) {
532 /* swap deleted line <-> blanked line */
533 blank = term.line[i];
534 term.line[i] = term.line[i-n];
535 term.line[i-n] = blank;
536 /* blank it */
537 memset(blank, 0, term.col * sizeof(Glyph));
538 }
539 }
540
541 void
542 tdeleteline(int n) {
543 int i;
544 Line blank;
545 int bot = term.bot;
546
547 if(term.c.y > term.bot)
548 bot = term.row - 1;
549 else if(term.c.y < term.top)
550 bot = term.top - 1;
551 if(term.c.y + n >= bot) {
552 tclearregion(0, term.c.y, term.col-1, bot);
553 return;
554 }
555 for(i = term.c.y; i <= bot-n; i++) {
556 /* swap deleted line <-> blanked line */
557 blank = term.line[i];
558 term.line[i] = term.line[i+n];
559 term.line[i+n] = blank;
560 /* blank it */
561 memset(blank, 0, term.col * sizeof(Glyph));
562 }
563 }
564
565 void
566 tsetattr(int *attr, int l) {
567 int i;
568
569 for(i = 0; i < l; i++) {
570 switch(attr[i]) {
571 case 0:
572 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD);
573 term.c.attr.fg = DefaultFG;
574 term.c.attr.bg = DefaultBG;
575 break;
576 case 1:
577 term.c.attr.mode |= ATTR_BOLD;
578 break;
579 case 4:
580 term.c.attr.mode |= ATTR_UNDERLINE;
581 break;
582 case 7:
583 term.c.attr.mode |= ATTR_REVERSE;
584 break;
585 case 22:
586 term.c.attr.mode &= ~ATTR_BOLD;
587 break;
588 case 24:
589 term.c.attr.mode &= ~ATTR_UNDERLINE;
590 break;
591 case 27:
592 term.c.attr.mode &= ~ATTR_REVERSE;
593 break;
594 case 38:
595 if (i + 2 < l && attr[i + 1] == 5) {
596 i += 2;
597 if (BETWEEN(attr[i], 0, 255))
598 term.c.attr.fg = attr[i];
599 else
600 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[i]);
601 }
602 else
603 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
604 break;
605 case 39:
606 term.c.attr.fg = DefaultFG;
607 break;
608 case 48:
609 if (i + 2 < l && attr[i + 1] == 5) {
610 i += 2;
611 if (BETWEEN(attr[i], 0, 255))
612 term.c.attr.bg = attr[i];
613 else
614 fprintf(stderr, "erresc: bad bgcolor %d\n", attr[i]);
615 }
616 else
617 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
618 break;
619 case 49:
620 term.c.attr.bg = DefaultBG;
621 break;
622 default:
623 if(BETWEEN(attr[i], 30, 37))
624 term.c.attr.fg = attr[i] - 30;
625 else if(BETWEEN(attr[i], 40, 47))
626 term.c.attr.bg = attr[i] - 40;
627 else if(BETWEEN(attr[i], 90, 97))
628 term.c.attr.fg = attr[i] - 90 + 8;
629 else if(BETWEEN(attr[i], 100, 107))
630 term.c.attr.fg = attr[i] - 100 + 8;
631 else
632 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
633 break;
634 }
635 }
636 }
637
638 void
639 tsetscroll(int t, int b) {
640 int temp;
641
642 LIMIT(t, 0, term.row-1);
643 LIMIT(b, 0, term.row-1);
644 if(t > b) {
645 temp = t;
646 t = b;
647 b = temp;
648 }
649 term.top = t;
650 term.bot = b;
651 }
652
653 void
654 csihandle(void) {
655 switch(escseq.mode) {
656 default:
657 unknown:
658 printf("erresc: unknown csi ");
659 csidump();
660 /* die(""); */
661 break;
662 case '@': /* ICH -- Insert <n> blank char */
663 DEFAULT(escseq.arg[0], 1);
664 tinsertblank(escseq.arg[0]);
665 break;
666 case 'A': /* CUU -- Cursor <n> Up */
667 case 'e':
668 DEFAULT(escseq.arg[0], 1);
669 tmoveto(term.c.x, term.c.y-escseq.arg[0]);
670 break;
671 case 'B': /* CUD -- Cursor <n> Down */
672 DEFAULT(escseq.arg[0], 1);
673 tmoveto(term.c.x, term.c.y+escseq.arg[0]);
674 break;
675 case 'C': /* CUF -- Cursor <n> Forward */
676 case 'a':
677 DEFAULT(escseq.arg[0], 1);
678 tmoveto(term.c.x+escseq.arg[0], term.c.y);
679 break;
680 case 'D': /* CUB -- Cursor <n> Backward */
681 DEFAULT(escseq.arg[0], 1);
682 tmoveto(term.c.x-escseq.arg[0], term.c.y);
683 break;
684 case 'E': /* CNL -- Cursor <n> Down and first col */
685 DEFAULT(escseq.arg[0], 1);
686 tmoveto(0, term.c.y+escseq.arg[0]);
687 break;
688 case 'F': /* CPL -- Cursor <n> Up and first col */
689 DEFAULT(escseq.arg[0], 1);
690 tmoveto(0, term.c.y-escseq.arg[0]);
691 break;
692 case 'G': /* CHA -- Move to <col> */
693 case '`': /* XXX: HPA -- same? */
694 DEFAULT(escseq.arg[0], 1);
695 tmoveto(escseq.arg[0]-1, term.c.y);
696 break;
697 case 'H': /* CUP -- Move to <row> <col> */
698 case 'f': /* XXX: HVP -- same? */
699 DEFAULT(escseq.arg[0], 1);
700 DEFAULT(escseq.arg[1], 1);
701 tmoveto(escseq.arg[1]-1, escseq.arg[0]-1);
702 break;
703 /* XXX: (CSI n I) CHT -- Cursor Forward Tabulation <n> tab stops */
704 case 'J': /* ED -- Clear screen */
705 switch(escseq.arg[0]) {
706 case 0: /* below */
707 tclearregion(term.c.x, term.c.y, term.col-1, term.row-1);
708 break;
709 case 1: /* above */
710 tclearregion(0, 0, term.c.x, term.c.y);
711 break;
712 case 2: /* all */
713 tclearregion(0, 0, term.col-1, term.row-1);
714 break;
715 case 3: /* XXX: erase saved lines (xterm) */
716 default:
717 goto unknown;
718 }
719 break;
720 case 'K': /* EL -- Clear line */
721 switch(escseq.arg[0]) {
722 case 0: /* right */
723 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
724 break;
725 case 1: /* left */
726 tclearregion(0, term.c.y, term.c.x, term.c.y);
727 break;
728 case 2: /* all */
729 tclearregion(0, term.c.y, term.col-1, term.c.y);
730 break;
731 }
732 break;
733 case 'S': /* SU -- Scroll <n> line up */
734 DEFAULT(escseq.arg[0], 1);
735 tscrollup(escseq.arg[0]);
736 break;
737 case 'T': /* SD -- Scroll <n> line down */
738 DEFAULT(escseq.arg[0], 1);
739 tscrolldown(escseq.arg[0]);
740 break;
741 case 'L': /* IL -- Insert <n> blank lines */
742 DEFAULT(escseq.arg[0], 1);
743 tinsertblankline(escseq.arg[0]);
744 break;
745 case 'l': /* RM -- Reset Mode */
746 if(escseq.priv) {
747 switch(escseq.arg[0]) {
748 case 1:
749 term.mode &= ~MODE_APPKEYPAD;
750 break;
751 case 7:
752 term.mode &= ~MODE_WRAP;
753 break;
754 case 12: /* att610 -- Stop blinking cursor (IGNORED) */
755 break;
756 case 25:
757 term.hidec = 1;
758 break;
759 case 1048: /* XXX: no alt. screen to erase/save */
760 case 1049:
761 tcursor(CURSOR_LOAD);
762 tclearregion(0, 0, term.col-1, term.row-1);
763 break;
764 default:
765 goto unknown;
766 }
767 } else {
768 switch(escseq.arg[0]) {
769 case 4:
770 term.mode &= ~MODE_INSERT;
771 break;
772 default:
773 goto unknown;
774 }
775 }
776 break;
777 case 'M': /* DL -- Delete <n> lines */
778 DEFAULT(escseq.arg[0], 1);
779 tdeleteline(escseq.arg[0]);
780 break;
781 case 'X': /* ECH -- Erase <n> char */
782 DEFAULT(escseq.arg[0], 1);
783 tclearregion(term.c.x, term.c.y, term.c.x + escseq.arg[0], term.c.y);
784 break;
785 case 'P': /* DCH -- Delete <n> char */
786 DEFAULT(escseq.arg[0], 1);
787 tdeletechar(escseq.arg[0]);
788 break;
789 /* XXX: (CSI n Z) CBT -- Cursor Backward Tabulation <n> tab stops */
790 case 'd': /* VPA -- Move to <row> */
791 DEFAULT(escseq.arg[0], 1);
792 tmoveto(term.c.x, escseq.arg[0]-1);
793 break;
794 case 'h': /* SM -- Set terminal mode */
795 if(escseq.priv) {
796 switch(escseq.arg[0]) {
797 case 1:
798 term.mode |= MODE_APPKEYPAD;
799 break;
800 case 7:
801 term.mode |= MODE_WRAP;
802 break;
803 case 12: /* att610 -- Start blinking cursor (IGNORED) */
804 break;
805 case 25:
806 term.hidec = 0;
807 break;
808 case 1048:
809 case 1049: /* XXX: no alt. screen to erase/save */
810 tcursor(CURSOR_SAVE);
811 tclearregion(0, 0, term.col-1, term.row-1);
812 break;
813 default: goto unknown;
814 }
815 } else {
816 switch(escseq.arg[0]) {
817 case 4:
818 term.mode |= MODE_INSERT;
819 break;
820 default: goto unknown;
821 }
822 };
823 break;
824 case 'm': /* SGR -- Terminal attribute (color) */
825 tsetattr(escseq.arg, escseq.narg);
826 break;
827 case 'r': /* DECSTBM -- Set Scrolling Region */
828 if(escseq.priv)
829 goto unknown;
830 else {
831 DEFAULT(escseq.arg[0], 1);
832 DEFAULT(escseq.arg[1], term.row);
833 tsetscroll(escseq.arg[0]-1, escseq.arg[1]-1);
834 }
835 break;
836 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
837 tcursor(CURSOR_SAVE);
838 break;
839 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
840 tcursor(CURSOR_LOAD);
841 break;
842 }
843 }
844
845 void
846 csidump(void) {
847 int i;
848 printf("ESC [ %s", escseq.priv ? "? " : "");
849 if(escseq.narg)
850 for(i = 0; i < escseq.narg; i++)
851 printf("%d ", escseq.arg[i]);
852 if(escseq.mode)
853 putchar(escseq.mode);
854 putchar('\n');
855 }
856
857 void
858 csireset(void) {
859 memset(&escseq, 0, sizeof(escseq));
860 }
861
862 void
863 tputtab(void) {
864 int space = TAB - term.c.x % TAB;
865
866 if(term.c.x + space >= term.col)
867 space--;
868
869 for(; space > 0; space--)
870 tmovecursor(CURSOR_RIGHT);
871 }
872
873 void
874 tputc(char c) {
875 if(term.esc & ESC_START) {
876 if(term.esc & ESC_CSI) {
877 escseq.buf[escseq.len++] = c;
878 if(BETWEEN(c, 0x40, 0x7E) || escseq.len >= ESC_BUF_SIZ) {
879 term.esc = 0;
880 csiparse(), csihandle();
881 }
882 } else if(term.esc & ESC_OSC) {
883 if(c == ';') {
884 term.titlelen = 0;
885 term.esc = ESC_START | ESC_TITLE;
886 }
887 } else if(term.esc & ESC_TITLE) {
888 if(c == '\a' || term.titlelen+1 >= ESC_TITLE_SIZ) {
889 term.esc = 0;
890 term.title[term.titlelen] = '\0';
891 XStoreName(xw.dis, xw.win, term.title);
892 } else {
893 term.title[term.titlelen++] = c;
894 }
895 } else if(term.esc & ESC_ALTCHARSET) {
896 switch(c) {
897 case '0': /* Line drawing crap */
898 term.c.attr.mode |= ATTR_GFX;
899 break;
900 case 'B': /* Back to regular text */
901 term.c.attr.mode &= ~ATTR_GFX;
902 break;
903 default:
904 printf("esc unhandled charset: ESC ( %c\n", c);
905 }
906 term.esc = 0;
907 } else {
908 switch(c) {
909 case '[':
910 term.esc |= ESC_CSI;
911 break;
912 case ']':
913 term.esc |= ESC_OSC;
914 break;
915 case '(':
916 term.esc |= ESC_ALTCHARSET;
917 break;
918 case 'A':
919 tmoveto(term.c.x, term.c.y-1);
920 term.esc = 0;
921 break;
922 case 'B':
923 tmoveto(term.c.x, term.c.y+1);
924 term.esc = 0;
925 break;
926 case 'C':
927 tmoveto(term.c.x+1, term.c.y);
928 term.esc = 0;
929 break;
930 case 'D': /* XXX: CUP (VT100) or IND (VT52) ... */
931 tmoveto(term.c.x-1, term.c.y);
932 term.esc = 0;
933 break;
934 case 'E': /* NEL -- Next line */
935 tnewline();
936 term.esc = 0;
937 break;
938 case 'M': /* RI -- Reverse index */
939 if(term.c.y == term.top)
940 tscrolldown(1);
941 else
942 tmoveto(term.c.x, term.c.y-1);
943 term.esc = 0;
944 break;
945 case 'c': /* RIS -- Reset to inital state */
946 treset();
947 term.esc = 0;
948 break;
949 case '=': /* DECPAM */
950 term.mode |= MODE_APPKEYPAD;
951 term.esc = 0;
952 break;
953 case '>': /* DECPNM */
954 term.mode &= ~MODE_APPKEYPAD;
955 term.esc = 0;
956 break;
957 case '7':
958 tcursor(CURSOR_SAVE);
959 term.esc = 0;
960 break;
961 case '8':
962 tcursor(CURSOR_LOAD);
963 term.esc = 0;
964 break;
965 default:
966 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n", c, isprint(c)?c:'.');
967 term.esc = 0;
968 }
969 }
970 } else {
971 switch(c) {
972 case '\t':
973 tputtab();
974 break;
975 case '\b':
976 tmovecursor(CURSOR_LEFT);
977 break;
978 case '\r':
979 tmoveto(0, term.c.y);
980 break;
981 case '\n':
982 tnewline();
983 break;
984 case '\a':
985 xbell();
986 break;
987 case '\033':
988 csireset();
989 term.esc = ESC_START;
990 break;
991 default:
992 tsetchar(c);
993 tmovecursor(CURSOR_RIGHT);
994 break;
995 }
996 }
997 }
998
999 void
1000 tputs(char *s, int len) {
1001 for(; len > 0; len--)
1002 tputc(*s++);
1003 }
1004
1005 void
1006 tresize(int col, int row) {
1007 int i;
1008 Line *line;
1009 int minrow = MIN(row, term.row);
1010 int mincol = MIN(col, term.col);
1011
1012 if(col < 1 || row < 1)
1013 return;
1014 /* alloc */
1015 line = calloc(row, sizeof(Line));
1016 for(i = 0 ; i < row; i++)
1017 line[i] = calloc(col, sizeof(Glyph));
1018 /* copy */
1019 for(i = 0 ; i < minrow; i++)
1020 memcpy(line[i], term.line[i], mincol * sizeof(Glyph));
1021 /* free */
1022 for(i = 0; i < term.row; i++)
1023 free(term.line[i]);
1024 free(term.line);
1025
1026 LIMIT(term.c.x, 0, col-1);
1027 LIMIT(term.c.y, 0, row-1);
1028 LIMIT(term.top, 0, row-1);
1029 LIMIT(term.bot, 0, row-1);
1030
1031 term.bot = row-1;
1032 term.line = line;
1033 term.col = col, term.row = row;
1034 }
1035
1036 void
1037 xloadcols(void) {
1038 int i, r, g, b;
1039 XColor color;
1040 Colormap cmap = DefaultColormap(xw.dis, xw.scr);
1041 unsigned long white = WhitePixel(xw.dis, xw.scr);
1042
1043 for(i = 0; i < 16; i++) {
1044 if (!XAllocNamedColor(xw.dis, cmap, colorname[i], &color, &color)) {
1045 dc.col[i] = white;
1046 fprintf(stderr, "Could not allocate color '%s'\n", colorname[i]);
1047 } else
1048 dc.col[i] = color.pixel;
1049 }
1050
1051 /* same colors as xterm */
1052 for(r = 0; r < 6; r++)
1053 for(g = 0; g < 6; g++)
1054 for(b = 0; b < 6; b++) {
1055 color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
1056 color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
1057 color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
1058 if (!XAllocColor(xw.dis, cmap, &color)) {
1059 dc.col[i] = white;
1060 fprintf(stderr, "Could not allocate color %d\n", i);
1061 } else
1062 dc.col[i] = color.pixel;
1063 i++;
1064 }
1065
1066 for(r = 0; r < 24; r++, i++) {
1067 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
1068 if (!XAllocColor(xw.dis, cmap, &color)) {
1069 dc.col[i] = white;
1070 fprintf(stderr, "Could not allocate color %d\n", i);
1071 } else
1072 dc.col[i] = color.pixel;
1073 }
1074 }
1075
1076 void
1077 xclear(int x1, int y1, int x2, int y2) {
1078 XSetForeground(xw.dis, dc.gc, dc.col[DefaultBG]);
1079 XFillRectangle(xw.dis, xw.buf, dc.gc,
1080 x1 * xw.cw, y1 * xw.ch,
1081 (x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch);
1082 }
1083
1084 void
1085 xhints(void)
1086 {
1087 XClassHint class = {TNAME, TNAME};
1088 XWMHints wm = {.flags = InputHint, .input = 1};
1089 XSizeHints size = {
1090 .flags = PSize | PResizeInc | PBaseSize,
1091 .height = xw.h,
1092 .width = xw.w,
1093 .height_inc = xw.ch,
1094 .width_inc = xw.cw,
1095 .base_height = 2*BORDER,
1096 .base_width = 2*BORDER,
1097 };
1098 XSetWMProperties(xw.dis, xw.win, NULL, NULL, NULL, 0, &size, &wm, &class);
1099 }
1100
1101 void
1102 xinit(void) {
1103 xw.dis = XOpenDisplay(NULL);
1104 xw.scr = XDefaultScreen(xw.dis);
1105 if(!xw.dis)
1106 die("Can't open display\n");
1107
1108 /* font */
1109 if(!(dc.font = XLoadQueryFont(xw.dis, FONT)) || !(dc.bfont = XLoadQueryFont(xw.dis, BOLDFONT)))
1110 die("Can't load font %s\n", dc.font ? BOLDFONT : FONT);
1111
1112 /* XXX: Assuming same size for bold font */
1113 xw.cw = dc.font->max_bounds.rbearing - dc.font->min_bounds.lbearing;
1114 xw.ch = dc.font->ascent + dc.font->descent;
1115
1116 /* colors */
1117 xloadcols();
1118
1119 term.c.attr.fg = DefaultFG;
1120 term.c.attr.bg = DefaultBG;
1121 term.c.attr.mode = ATTR_NULL;
1122 /* windows */
1123 xw.h = term.row * xw.ch + 2*BORDER;
1124 xw.w = term.col * xw.cw + 2*BORDER;
1125 xw.win = XCreateSimpleWindow(xw.dis, XRootWindow(xw.dis, xw.scr), 0, 0,
1126 xw.w, xw.h, 0,
1127 dc.col[DefaultBG],
1128 dc.col[DefaultBG]);
1129 xw.bufw = xw.w - 2*BORDER;
1130 xw.bufh = xw.h - 2*BORDER;
1131 xw.buf = XCreatePixmap(xw.dis, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dis, xw.scr));
1132 /* gc */
1133 dc.gc = XCreateGC(xw.dis, xw.win, 0, NULL);
1134 XMapWindow(xw.dis, xw.win);
1135 xhints();
1136 XStoreName(xw.dis, xw.win, "st");
1137 XSync(xw.dis, 0);
1138 }
1139
1140 void
1141 xdraws(char *s, Glyph base, int x, int y, int len) {
1142 unsigned long xfg, xbg;
1143 int winx = x*xw.cw, winy = y*xw.ch + dc.font->ascent, width = len*xw.cw;
1144 int i;
1145
1146 if(base.mode & ATTR_REVERSE)
1147 xfg = dc.col[base.bg], xbg = dc.col[base.fg];
1148 else
1149 xfg = dc.col[base.fg], xbg = dc.col[base.bg];
1150
1151 XSetBackground(xw.dis, dc.gc, xbg);
1152 XSetForeground(xw.dis, dc.gc, xfg);
1153
1154 if(base.mode & ATTR_GFX)
1155 for(i = 0; i < len; i++)
1156 s[i] = gfx[(int)s[i]];
1157
1158 XSetFont(xw.dis, dc.gc, base.mode & ATTR_BOLD ? dc.bfont->fid : dc.font->fid);
1159 XDrawImageString(xw.dis, xw.buf, dc.gc, winx, winy, s, len);
1160
1161 if(base.mode & ATTR_UNDERLINE)
1162 XDrawLine(xw.dis, xw.buf, dc.gc, winx, winy+1, winx+width-1, winy+1);
1163 }
1164
1165 void
1166 xcursor(int mode) {
1167 static int oldx = 0;
1168 static int oldy = 0;
1169 Glyph g = {' ', ATTR_NULL, DefaultBG, DefaultCS, 0};
1170
1171 LIMIT(oldx, 0, term.col-1);
1172 LIMIT(oldy, 0, term.row-1);
1173
1174 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
1175 g.c = term.line[term.c.y][term.c.x].c;
1176
1177 /* remove the old cursor */
1178 if(term.line[oldy][oldx].state & GLYPH_SET)
1179 xdraws(&term.line[oldy][oldx].c, term.line[oldy][oldx], oldx, oldy, 1);
1180 else
1181 xclear(oldx, oldy, oldx, oldy);
1182
1183 /* draw the new one */
1184 if(mode == CURSOR_DRAW) {
1185 xdraws(&g.c, g, term.c.x, term.c.y, 1);
1186 oldx = term.c.x, oldy = term.c.y;
1187 }
1188 }
1189
1190 #ifdef DEBUG
1191 /* basic drawing routines */
1192 void
1193 xdrawc(int x, int y, Glyph g) {
1194 XRectangle r = { x * xw.cw, y * xw.ch, xw.cw, xw.ch };
1195 XSetBackground(xw.dis, dc.gc, dc.col[g.bg]);
1196 XSetForeground(xw.dis, dc.gc, dc.col[g.fg]);
1197 XSetFont(xw.dis, dc.gc, g.mode & ATTR_BOLD ? dc.bfont->fid : dc.font->fid);
1198 XDrawImageString(xw.dis, xw.buf, dc.gc, r.x, r.y+dc.font->ascent, &g.c, 1);
1199 }
1200
1201 void
1202 draw(int dummy) {
1203 int x, y;
1204
1205 xclear(0, 0, term.col-1, term.row-1);
1206 for(y = 0; y < term.row; y++)
1207 for(x = 0; x < term.col; x++)
1208 if(term.line[y][x].state & GLYPH_SET)
1209 xdrawc(x, y, term.line[y][x]);
1210
1211 if(!term.hidec)
1212 xcursor(CURSOR_DRAW);
1213 XCopyArea(xw.dis, xw.buf, xw.win, dc.gc, 0, 0, xw.bufw, xw.bufh, BORDER, BORDER);
1214 XFlush(xw.dis);
1215 }
1216
1217 #else
1218 /* optimized drawing routine */
1219 void
1220 draw(int redraw_all) {
1221 int i, x, y, ox;
1222 Glyph base, new;
1223 char buf[DRAW_BUF_SIZ];
1224
1225 XSetForeground(xw.dis, dc.gc, dc.col[DefaultBG]);
1226 XFillRectangle(xw.dis, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
1227 for(y = 0; y < term.row; y++) {
1228 base = term.line[y][0];
1229 i = ox = 0;
1230 for(x = 0; x < term.col; x++) {
1231 new = term.line[y][x];
1232 if(!ATTRCMP(base, new) && i < DRAW_BUF_SIZ)
1233 buf[i++] = new.c;
1234 else {
1235 xdraws(buf, base, ox, y, i);
1236 buf[0] = new.c;
1237 i = 1;
1238 ox = x;
1239 base = new;
1240 }
1241 }
1242 xdraws(buf, base, ox, y, i);
1243 }
1244 xcursor(term.hidec ? CURSOR_HIDE : CURSOR_DRAW);
1245 XCopyArea(xw.dis, xw.buf, xw.win, dc.gc, 0, 0, xw.bufw, xw.bufh, BORDER, BORDER);
1246 XFlush(xw.dis);
1247 }
1248
1249 #endif
1250
1251 void
1252 expose(XEvent *ev) {
1253 draw(SCREEN_REDRAW);
1254 }
1255
1256 char*
1257 kmap(KeySym k) {
1258 int i;
1259 for(i = 0; i < LEN(key); i++)
1260 if(key[i].k == k)
1261 return (char*)key[i].s;
1262 return NULL;
1263 }
1264
1265 void
1266 kpress(XEvent *ev) {
1267 XKeyEvent *e = &ev->xkey;
1268 KeySym ksym;
1269 char buf[32];
1270 char *customkey;
1271 int len;
1272 int meta;
1273 int shift;
1274
1275 meta = e->state & Mod1Mask;
1276 shift = e->state & ShiftMask;
1277 len = XLookupString(e, buf, sizeof(buf), &ksym, NULL);
1278
1279 if((customkey = kmap(ksym)))
1280 ttywrite(customkey, strlen(customkey));
1281 else if(len > 0) {
1282 buf[sizeof(buf)-1] = '\0';
1283 if(meta && len == 1)
1284 ttywrite("\033", 1);
1285 ttywrite(buf, len);
1286 } else
1287 switch(ksym) {
1288 case XK_Up:
1289 case XK_Down:
1290 case XK_Left:
1291 case XK_Right:
1292 sprintf(buf, "\033%c%c", term.mode & MODE_APPKEYPAD ? 'O' : '[', "DACB"[ksym - XK_Left]);
1293 ttywrite(buf, 3);
1294 break;
1295 case XK_Insert:
1296 if(shift)
1297 draw(1), puts("draw!")/* XXX: paste X clipboard */;
1298 break;
1299 default:
1300 fprintf(stderr, "errkey: %d\n", (int)ksym);
1301 break;
1302 }
1303 }
1304
1305 void
1306 resize(XEvent *e) {
1307 int col, row;
1308
1309 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
1310 return;
1311
1312 xw.w = e->xconfigure.width;
1313 xw.h = e->xconfigure.height;
1314 xw.bufw = xw.w - 2*BORDER;
1315 xw.bufh = xw.h - 2*BORDER;
1316 col = xw.bufw / xw.cw;
1317 row = xw.bufh / xw.ch;
1318 tresize(col, row);
1319 ttyresize(col, row);
1320 XFreePixmap(xw.dis, xw.buf);
1321 xw.buf = XCreatePixmap(xw.dis, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dis, xw.scr));
1322 draw(SCREEN_REDRAW);
1323 }
1324
1325 void
1326 run(void) {
1327 XEvent ev;
1328 fd_set rfd;
1329 int xfd = XConnectionNumber(xw.dis);
1330
1331 running = 1;
1332 XSelectInput(xw.dis, xw.win, ExposureMask | KeyPressMask | StructureNotifyMask);
1333 XResizeWindow(xw.dis, xw.win, xw.w, xw.h); /* XXX: fix resize bug in wmii (?) */
1334
1335 while(running) {
1336 FD_ZERO(&rfd);
1337 FD_SET(cmdfd, &rfd);
1338 FD_SET(xfd, &rfd);
1339 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, NULL) == -1) {
1340 if(errno == EINTR)
1341 continue;
1342 die("select failed: %s\n", SERRNO);
1343 }
1344 if(FD_ISSET(cmdfd, &rfd)) {
1345 ttyread();
1346 draw(SCREEN_UPDATE);
1347 }
1348 while(XPending(xw.dis)) {
1349 XNextEvent(xw.dis, &ev);
1350 if(handler[ev.type])
1351 (handler[ev.type])(&ev);
1352 }
1353 }
1354 }
1355
1356 int
1357 main(int argc, char *argv[]) {
1358 if(argc == 2 && !strncmp("-v", argv[1], 3))
1359 die("st-" VERSION ", © 2009 st engineers\n");
1360 else if(argc != 1)
1361 die("usage: st [-v]\n");
1362 setlocale(LC_CTYPE, "");
1363 tnew(80, 24);
1364 ttynew();
1365 xinit();
1366 run();
1367 return 0;
1368 }