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