Xinqi Bao's Git

projects / st.git / blob
summary | log | commit | diff | tree
history | raw | HEAD
fix warning
[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 <pty.h>
20 #include <X11/Xlib.h>
21 #include <X11/keysym.h>
22 #include <X11/Xutil.h>
23
24 #if defined(LINUX)
25 #include <pty.h>
26 #elif defined(OPENBSD)
27 #include <util.h>
28 #elif defined(FREEBSD)
29 #include <libutil.h>
30 #endif
31
32 /* Arbitrary sizes */
33 #define ESC_TITLE_SIZ 256
34 #define ESC_BUF_SIZ 256
35 #define ESC_ARG_SIZ 16
36 #define DRAW_BUF_SIZ 1024
37
38 #define SERRNO strerror(errno)
39 #define MIN(a, b) ((a) < (b) ? (a) : (b))
40 #define MAX(a, b) ((a) < (b) ? (b) : (a))
41 #define LEN(a) (sizeof(a) / sizeof(a[0]))
42 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
43 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
44 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
45 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
46 #define IS_SET(flag) (term.mode & (flag))
47
48 /* Attribute, Cursor, Character state, Terminal mode, Screen draw mode */
49 enum { ATTR_NULL=0 , ATTR_REVERSE=1 , ATTR_UNDERLINE=2, ATTR_BOLD=4, ATTR_GFX=8 };
50 enum { CURSOR_UP, CURSOR_DOWN, CURSOR_LEFT, CURSOR_RIGHT, CURSOR_HIDE = 1,
51 CURSOR_DRAW = 0, CURSOR_SAVE, CURSOR_LOAD };
52 enum { GLYPH_SET=1, GLYPH_DIRTY=2 };
53 enum { MODE_WRAP=1, MODE_INSERT=2, MODE_APPKEYPAD=4 };
54 enum { ESC_START=1, ESC_CSI=2, ESC_OSC=4, ESC_TITLE=8, ESC_ALTCHARSET=16 };
55 enum { SCREEN_UPDATE, SCREEN_REDRAW };
56
57 typedef struct {
58 char c; /* character code */
59 char mode; /* attribute flags */
60 int fg; /* foreground */
61 int bg; /* background */
62 char state; /* state flags */
63 } Glyph;
64
65 typedef Glyph* Line;
66
67 typedef struct {
68 Glyph attr; /* current char attributes */
69 int x;
70 int y;
71 char hide;
72 } TCursor;
73
74 /* CSI Escape sequence structs */
75 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
76 typedef struct {
77 char buf[ESC_BUF_SIZ]; /* raw string */
78 int len; /* raw string length */
79 char priv;
80 int arg[ESC_ARG_SIZ];
81 int narg; /* nb of args */
82 char mode;
83 } CSIEscape;
84
85 /* Internal representation of the screen */
86 typedef struct {
87 int row; /* nb row */
88 int col; /* nb col */
89 Line* line; /* screen */
90 TCursor c; /* cursor */
91 int top; /* top scroll limit */
92 int bot; /* bottom scroll limit */
93 int mode; /* terminal mode flags */
94 int esc; /* escape state flags */
95 char title[ESC_TITLE_SIZ];
96 int titlelen;
97 } Term;
98
99 /* Purely graphic info */
100 typedef struct {
101 Display* dis;
102 Window win;
103 Pixmap buf;
104 int scr;
105 int w; /* window width */
106 int h; /* window height */
107 int bufw; /* pixmap width */
108 int bufh; /* pixmap height */
109 int ch; /* char height */
110 int cw; /* char width */
111 } XWindow;
112
113 typedef struct {
114 KeySym k;
115 char s[ESC_BUF_SIZ];
116 } Key;
117
118 /* Drawing Context */
119 typedef struct {
120 unsigned long col[256];
121 XFontStruct* font;
122 XFontStruct* bfont;
123 GC gc;
124 } DC;
125
126 #include "config.h"
127
128 static void die(const char *errstr, ...);
129 static void draw(int);
130 static void execsh(void);
131 static void sigchld(int);
132 static void run(void);
133
134 static void csidump(void);
135 static void csihandle(void);
136 static void csiparse(void);
137 static void csireset(void);
138
139 static void tclearregion(int, int, int, int);
140 static void tcursor(int);
141 static void tdeletechar(int);
142 static void tdeleteline(int);
143 static void tinsertblank(int);
144 static void tinsertblankline(int);
145 static void tmoveto(int, int);
146 static void tnew(int, int);
147 static void tnewline(void);
148 static void tputtab(void);
149 static void tputc(char);
150 static void tputs(char*, int);
151 static void treset(void);
152 static void tresize(int, int);
153 static void tscrollup(int);
154 static void tscrolldown(int);
155 static void tsetattr(int*, int);
156 static void tsetchar(char);
157 static void tsetscroll(int, int);
158
159 static void ttynew(void);
160 static void ttyread(void);
161 static void ttyresize(int, int);
162 static void ttywrite(const char *, size_t);
163
164 static void xbell(void);
165 static void xdraws(char *, Glyph, int, int, int);
166 static void xhints(void);
167 static void xclear(int, int, int, int);
168 static void xcursor(int);
169 static void xinit(void);
170 static void xloadcols(void);
171
172 static void expose(XEvent *);
173 static char* kmap(KeySym);
174 static void kpress(XEvent *);
175 static void resize(XEvent *);
176
177 static void (*handler[LASTEvent])(XEvent *) = {
178 [KeyPress] = kpress,
179 [Expose] = expose,
180 [ConfigureNotify] = resize
181 };
182
183 /* Globals */
184 static DC dc;
185 static XWindow xw;
186 static Term term;
187 static CSIEscape escseq;
188 static int cmdfd;
189 static pid_t pid;
190 static int running;
191
192 #ifdef DEBUG
193 void
194 tdump(void) {
195 int row, col;
196 Glyph c;
197
198 for(row = 0; row < term.row; row++) {
199 for(col = 0; col < term.col; col++) {
200 if(col == term.c.x && row == term.c.y)
201 putchar('#');
202 else {
203 c = term.line[row][col];
204 putchar(c.state & GLYPH_SET ? c.c : '.');
205 }
206 }
207 putchar('\n');
208 }
209 }
210 #endif
211
212 void
213 die(const char *errstr, ...) {
214 va_list ap;
215
216 va_start(ap, errstr);
217 vfprintf(stderr, errstr, ap);
218 va_end(ap);
219 exit(EXIT_FAILURE);
220 }
221
222 void
223 execsh(void) {
224 char *args[3] = {getenv("SHELL"), "-i", NULL};
225 DEFAULT(args[0], "/bin/sh"); /* if getenv() failed */
226 putenv("TERM=" TNAME);
227 execvp(args[0], args);
228 }
229
230 void
231 xbell(void) {
232 XSetForeground(xw.dis, dc.gc, dc.col[BellCol]);
233 XFillRectangle(xw.dis, xw.win, dc.gc, BORDER, BORDER, xw.bufw, xw.bufh);
234 XFlush(xw.dis);
235 usleep(BellTime);
236 draw(SCREEN_REDRAW);
237 }
238
239 void
240 sigchld(int a) {
241 int stat = 0;
242 if(waitpid(pid, &stat, 0) < 0)
243 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
244 if(WIFEXITED(stat))
245 exit(WEXITSTATUS(stat));
246 else
247 exit(EXIT_FAILURE);
248 }
249
250 void
251 ttynew(void) {
252 int m, s;
253
254 /* seems to work fine on linux, openbsd and freebsd */
255 struct winsize w = {term.row, term.col, 0, 0};
256 if(openpty(&m, &s, NULL, NULL, &w) < 0)
257 die("openpty failed: %s\n", SERRNO);
258
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 = (TCursor){{
330 .mode = ATTR_NULL,
331 .fg = DefaultFG,
332 .bg = DefaultBG
333 }, .x = 0, .y = 0, .hide = 0};
334
335 term.top = 0, term.bot = term.row - 1;
336 term.mode = MODE_WRAP;
337 tclearregion(0, 0, term.col-1, term.row-1);
338 }
339
340 void
341 tnew(int col, int row) {
342 /* set screen size */
343 term.row = row, term.col = col;
344 term.line = malloc(term.row * sizeof(Line));
345 for(row = 0 ; row < term.row; row++)
346 term.line[row] = malloc(term.col * sizeof(Glyph));
347 /* setup screen */
348 treset();
349 }
350
351 void
352 tscrolldown (int n) {
353 int i;
354 Line temp;
355
356 LIMIT(n, 0, term.bot-term.top+1);
357
358 for(i = 0; i < n; i++)
359 memset(term.line[term.bot-i], 0, term.col*sizeof(Glyph));
360
361 for(i = term.bot; i >= term.top+n; i--) {
362 temp = term.line[i];
363 term.line[i] = term.line[i-n];
364 term.line[i-n] = temp;
365 }
366 }
367
368 void
369 tscrollup (int n) {
370 int i;
371 Line temp;
372 LIMIT(n, 0, term.bot-term.top+1);
373
374 for(i = 0; i < n; i++)
375 memset(term.line[term.top+i], 0, term.col*sizeof(Glyph));
376
377 for(i = term.top; i <= term.bot-n; i++) {
378 temp = term.line[i];
379 term.line[i] = term.line[i+n];
380 term.line[i+n] = temp;
381 }
382 }
383
384 void
385 tnewline(void) {
386 int y = term.c.y + 1;
387 if(y > term.bot)
388 tscrollup(1), y = term.bot;
389 tmoveto(0, y);
390 }
391
392 void
393 csiparse(void) {
394 /* int noarg = 1; */
395 char *p = escseq.buf;
396
397 escseq.narg = 0;
398 if(*p == '?')
399 escseq.priv = 1, p++;
400
401 while(p < escseq.buf+escseq.len) {
402 while(isdigit(*p)) {
403 escseq.arg[escseq.narg] *= 10;
404 escseq.arg[escseq.narg] += *p++ - '0'/*, noarg = 0 */;
405 }
406 if(*p == ';' && escseq.narg+1 < ESC_ARG_SIZ)
407 escseq.narg++, p++;
408 else {
409 escseq.mode = *p;
410 escseq.narg++;
411 return;
412 }
413 }
414 }
415
416 void
417 tmoveto(int x, int y) {
418 term.c.x = x < 0 ? 0 : x >= term.col ? term.col-1 : x;
419 term.c.y = y < 0 ? 0 : y >= term.row ? term.row-1 : y;
420 }
421
422 void
423 tsetchar(char c) {
424 term.line[term.c.y][term.c.x] = term.c.attr;
425 term.line[term.c.y][term.c.x].c = c;
426 term.line[term.c.y][term.c.x].state |= GLYPH_SET;
427 }
428
429 void
430 tclearregion(int x1, int y1, int x2, int y2) {
431 int y, temp;
432
433 if(x1 > x2)
434 temp = x1, x1 = x2, x2 = temp;
435 if(y1 > y2)
436 temp = y1, y1 = y2, y2 = temp;
437
438 LIMIT(x1, 0, term.col-1);
439 LIMIT(x2, 0, term.col-1);
440 LIMIT(y1, 0, term.row-1);
441 LIMIT(y2, 0, term.row-1);
442
443 for(y = y1; y <= y2; y++)
444 memset(&term.line[y][x1], 0, sizeof(Glyph)*(x2-x1+1));
445 }
446
447 void
448 tdeletechar(int n) {
449 int src = term.c.x + n;
450 int dst = term.c.x;
451 int size = term.col - src;
452
453 if(src >= term.col) {
454 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
455 return;
456 }
457 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
458 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
459 }
460
461 void
462 tinsertblank(int n) {
463 int src = term.c.x;
464 int dst = src + n;
465 int size = term.col - dst;
466
467 if(dst >= term.col) {
468 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
469 return;
470 }
471 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
472 tclearregion(src, term.c.y, dst - 1, term.c.y);
473 }
474
475 void
476 tinsertblankline(int n) {
477 int i;
478 Line blank;
479 int bot = term.bot;
480
481 if(term.c.y > term.bot)
482 bot = term.row - 1;
483 else if(term.c.y < term.top)
484 bot = term.top - 1;
485 if(term.c.y + n >= bot) {
486 tclearregion(0, term.c.y, term.col-1, bot);
487 return;
488 }
489 for(i = bot; i >= term.c.y+n; i--) {
490 /* swap deleted line <-> blanked line */
491 blank = term.line[i];
492 term.line[i] = term.line[i-n];
493 term.line[i-n] = blank;
494 /* blank it */
495 memset(blank, 0, term.col * sizeof(Glyph));
496 }
497 }
498
499 void
500 tdeleteline(int n) {
501 int i;
502 Line blank;
503 int bot = term.bot;
504
505 if(term.c.y > term.bot)
506 bot = term.row - 1;
507 else if(term.c.y < term.top)
508 bot = term.top - 1;
509 if(term.c.y + n >= bot) {
510 tclearregion(0, term.c.y, term.col-1, bot);
511 return;
512 }
513 for(i = term.c.y; i <= bot-n; i++) {
514 /* swap deleted line <-> blanked line */
515 blank = term.line[i];
516 term.line[i] = term.line[i+n];
517 term.line[i+n] = blank;
518 /* blank it */
519 memset(blank, 0, term.col * sizeof(Glyph));
520 }
521 }
522
523 void
524 tsetattr(int *attr, int l) {
525 int i;
526
527 for(i = 0; i < l; i++) {
528 switch(attr[i]) {
529 case 0:
530 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD);
531 term.c.attr.fg = DefaultFG;
532 term.c.attr.bg = DefaultBG;
533 break;
534 case 1:
535 term.c.attr.mode |= ATTR_BOLD;
536 break;
537 case 4:
538 term.c.attr.mode |= ATTR_UNDERLINE;
539 break;
540 case 7:
541 term.c.attr.mode |= ATTR_REVERSE;
542 break;
543 case 22:
544 term.c.attr.mode &= ~ATTR_BOLD;
545 break;
546 case 24:
547 term.c.attr.mode &= ~ATTR_UNDERLINE;
548 break;
549 case 27:
550 term.c.attr.mode &= ~ATTR_REVERSE;
551 break;
552 case 38:
553 if (i + 2 < l && attr[i + 1] == 5) {
554 i += 2;
555 if (BETWEEN(attr[i], 0, 255))
556 term.c.attr.fg = attr[i];
557 else
558 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[i]);
559 }
560 else
561 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
562 break;
563 case 39:
564 term.c.attr.fg = DefaultFG;
565 break;
566 case 48:
567 if (i + 2 < l && attr[i + 1] == 5) {
568 i += 2;
569 if (BETWEEN(attr[i], 0, 255))
570 term.c.attr.bg = attr[i];
571 else
572 fprintf(stderr, "erresc: bad bgcolor %d\n", attr[i]);
573 }
574 else
575 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
576 break;
577 case 49:
578 term.c.attr.bg = DefaultBG;
579 break;
580 default:
581 if(BETWEEN(attr[i], 30, 37))
582 term.c.attr.fg = attr[i] - 30;
583 else if(BETWEEN(attr[i], 40, 47))
584 term.c.attr.bg = attr[i] - 40;
585 else if(BETWEEN(attr[i], 90, 97))
586 term.c.attr.fg = attr[i] - 90 + 8;
587 else if(BETWEEN(attr[i], 100, 107))
588 term.c.attr.fg = attr[i] - 100 + 8;
589 else
590 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
591 break;
592 }
593 }
594 }
595
596 void
597 tsetscroll(int t, int b) {
598 int temp;
599
600 LIMIT(t, 0, term.row-1);
601 LIMIT(b, 0, term.row-1);
602 if(t > b) {
603 temp = t;
604 t = b;
605 b = temp;
606 }
607 term.top = t;
608 term.bot = b;
609 }
610
611 void
612 csihandle(void) {
613 switch(escseq.mode) {
614 default:
615 unknown:
616 printf("erresc: unknown csi ");
617 csidump();
618 /* die(""); */
619 break;
620 case '@': /* ICH -- Insert <n> blank char */
621 DEFAULT(escseq.arg[0], 1);
622 tinsertblank(escseq.arg[0]);
623 break;
624 case 'A': /* CUU -- Cursor <n> Up */
625 case 'e':
626 DEFAULT(escseq.arg[0], 1);
627 tmoveto(term.c.x, term.c.y-escseq.arg[0]);
628 break;
629 case 'B': /* CUD -- Cursor <n> Down */
630 DEFAULT(escseq.arg[0], 1);
631 tmoveto(term.c.x, term.c.y+escseq.arg[0]);
632 break;
633 case 'C': /* CUF -- Cursor <n> Forward */
634 case 'a':
635 DEFAULT(escseq.arg[0], 1);
636 tmoveto(term.c.x+escseq.arg[0], term.c.y);
637 break;
638 case 'D': /* CUB -- Cursor <n> Backward */
639 DEFAULT(escseq.arg[0], 1);
640 tmoveto(term.c.x-escseq.arg[0], term.c.y);
641 break;
642 case 'E': /* CNL -- Cursor <n> Down and first col */
643 DEFAULT(escseq.arg[0], 1);
644 tmoveto(0, term.c.y+escseq.arg[0]);
645 break;
646 case 'F': /* CPL -- Cursor <n> Up and first col */
647 DEFAULT(escseq.arg[0], 1);
648 tmoveto(0, term.c.y-escseq.arg[0]);
649 break;
650 case 'G': /* CHA -- Move to <col> */
651 case '`': /* XXX: HPA -- same? */
652 DEFAULT(escseq.arg[0], 1);
653 tmoveto(escseq.arg[0]-1, term.c.y);
654 break;
655 case 'H': /* CUP -- Move to <row> <col> */
656 case 'f': /* XXX: HVP -- same? */
657 DEFAULT(escseq.arg[0], 1);
658 DEFAULT(escseq.arg[1], 1);
659 tmoveto(escseq.arg[1]-1, escseq.arg[0]-1);
660 break;
661 /* XXX: (CSI n I) CHT -- Cursor Forward Tabulation <n> tab stops */
662 case 'J': /* ED -- Clear screen */
663 switch(escseq.arg[0]) {
664 case 0: /* below */
665 tclearregion(term.c.x, term.c.y, term.col-1, term.row-1);
666 break;
667 case 1: /* above */
668 tclearregion(0, 0, term.c.x, term.c.y);
669 break;
670 case 2: /* all */
671 tclearregion(0, 0, term.col-1, term.row-1);
672 break;
673 case 3: /* XXX: erase saved lines (xterm) */
674 default:
675 goto unknown;
676 }
677 break;
678 case 'K': /* EL -- Clear line */
679 switch(escseq.arg[0]) {
680 case 0: /* right */
681 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
682 break;
683 case 1: /* left */
684 tclearregion(0, term.c.y, term.c.x, term.c.y);
685 break;
686 case 2: /* all */
687 tclearregion(0, term.c.y, term.col-1, term.c.y);
688 break;
689 }
690 break;
691 case 'S': /* SU -- Scroll <n> line up */
692 DEFAULT(escseq.arg[0], 1);
693 tscrollup(escseq.arg[0]);
694 break;
695 case 'T': /* SD -- Scroll <n> line down */
696 DEFAULT(escseq.arg[0], 1);
697 tscrolldown(escseq.arg[0]);
698 break;
699 case 'L': /* IL -- Insert <n> blank lines */
700 DEFAULT(escseq.arg[0], 1);
701 tinsertblankline(escseq.arg[0]);
702 break;
703 case 'l': /* RM -- Reset Mode */
704 if(escseq.priv) {
705 switch(escseq.arg[0]) {
706 case 1:
707 term.mode &= ~MODE_APPKEYPAD;
708 break;
709 case 7:
710 term.mode &= ~MODE_WRAP;
711 break;
712 case 12: /* att610 -- Stop blinking cursor (IGNORED) */
713 break;
714 case 25:
715 term.c.hide = CURSOR_HIDE;
716 break;
717 case 1048: /* XXX: no alt. screen to erase/save */
718 case 1049:
719 tcursor(CURSOR_LOAD);
720 tclearregion(0, 0, term.col-1, term.row-1);
721 break;
722 default:
723 goto unknown;
724 }
725 } else {
726 switch(escseq.arg[0]) {
727 case 4:
728 term.mode &= ~MODE_INSERT;
729 break;
730 default:
731 goto unknown;
732 }
733 }
734 break;
735 case 'M': /* DL -- Delete <n> lines */
736 DEFAULT(escseq.arg[0], 1);
737 tdeleteline(escseq.arg[0]);
738 break;
739 case 'X': /* ECH -- Erase <n> char */
740 DEFAULT(escseq.arg[0], 1);
741 tclearregion(term.c.x, term.c.y, term.c.x + escseq.arg[0], term.c.y);
742 break;
743 case 'P': /* DCH -- Delete <n> char */
744 DEFAULT(escseq.arg[0], 1);
745 tdeletechar(escseq.arg[0]);
746 break;
747 /* XXX: (CSI n Z) CBT -- Cursor Backward Tabulation <n> tab stops */
748 case 'd': /* VPA -- Move to <row> */
749 DEFAULT(escseq.arg[0], 1);
750 tmoveto(term.c.x, escseq.arg[0]-1);
751 break;
752 case 'h': /* SM -- Set terminal mode */
753 if(escseq.priv) {
754 switch(escseq.arg[0]) {
755 case 1:
756 term.mode |= MODE_APPKEYPAD;
757 break;
758 case 7:
759 term.mode |= MODE_WRAP;
760 break;
761 case 12: /* att610 -- Start blinking cursor (IGNORED) */
762 break;
763 case 25:
764 term.c.hide = CURSOR_DRAW;
765 break;
766 case 1048:
767 case 1049: /* XXX: no alt. screen to erase/save */
768 tcursor(CURSOR_SAVE);
769 tclearregion(0, 0, term.col-1, term.row-1);
770 break;
771 default: goto unknown;
772 }
773 } else {
774 switch(escseq.arg[0]) {
775 case 4:
776 term.mode |= MODE_INSERT;
777 break;
778 default: goto unknown;
779 }
780 };
781 break;
782 case 'm': /* SGR -- Terminal attribute (color) */
783 tsetattr(escseq.arg, escseq.narg);
784 break;
785 case 'r': /* DECSTBM -- Set Scrolling Region */
786 if(escseq.priv)
787 goto unknown;
788 else {
789 DEFAULT(escseq.arg[0], 1);
790 DEFAULT(escseq.arg[1], term.row);
791 tsetscroll(escseq.arg[0]-1, escseq.arg[1]-1);
792 }
793 break;
794 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
795 tcursor(CURSOR_SAVE);
796 break;
797 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
798 tcursor(CURSOR_LOAD);
799 break;
800 }
801 }
802
803 void
804 csidump(void) {
805 int i;
806 printf("ESC [ %s", escseq.priv ? "? " : "");
807 if(escseq.narg)
808 for(i = 0; i < escseq.narg; i++)
809 printf("%d ", escseq.arg[i]);
810 if(escseq.mode)
811 putchar(escseq.mode);
812 putchar('\n');
813 }
814
815 void
816 csireset(void) {
817 memset(&escseq, 0, sizeof(escseq));
818 }
819
820 void
821 tputtab(void) {
822 int space = TAB - term.c.x % TAB;
823 tmoveto(term.c.x + space, term.c.y);
824 }
825
826 void
827 tputc(char c) {
828 if(term.esc & ESC_START) {
829 if(term.esc & ESC_CSI) {
830 escseq.buf[escseq.len++] = c;
831 if(BETWEEN(c, 0x40, 0x7E) || escseq.len >= ESC_BUF_SIZ) {
832 term.esc = 0;
833 csiparse(), csihandle();
834 }
835 } else if(term.esc & ESC_OSC) {
836 if(c == ';') {
837 term.titlelen = 0;
838 term.esc = ESC_START | ESC_TITLE;
839 }
840 } else if(term.esc & ESC_TITLE) {
841 if(c == '\a' || term.titlelen+1 >= ESC_TITLE_SIZ) {
842 term.esc = 0;
843 term.title[term.titlelen] = '\0';
844 XStoreName(xw.dis, xw.win, term.title);
845 } else {
846 term.title[term.titlelen++] = c;
847 }
848 } else if(term.esc & ESC_ALTCHARSET) {
849 switch(c) {
850 case '0': /* Line drawing crap */
851 term.c.attr.mode |= ATTR_GFX;
852 break;
853 case 'B': /* Back to regular text */
854 term.c.attr.mode &= ~ATTR_GFX;
855 break;
856 default:
857 printf("esc unhandled charset: ESC ( %c\n", c);
858 }
859 term.esc = 0;
860 } else {
861 switch(c) {
862 case '[':
863 term.esc |= ESC_CSI;
864 break;
865 case ']':
866 term.esc |= ESC_OSC;
867 break;
868 case '(':
869 term.esc |= ESC_ALTCHARSET;
870 break;
871 case 'A':
872 tmoveto(term.c.x, term.c.y-1);
873 term.esc = 0;
874 break;
875 case 'B':
876 tmoveto(term.c.x, term.c.y+1);
877 term.esc = 0;
878 break;
879 case 'C':
880 tmoveto(term.c.x+1, term.c.y);
881 term.esc = 0;
882 break;
883 case 'D': /* XXX: CUP (VT100) or IND (VT52) ... */
884 tmoveto(term.c.x-1, term.c.y);
885 term.esc = 0;
886 break;
887 case 'E': /* NEL -- Next line */
888 tnewline();
889 term.esc = 0;
890 break;
891 case 'M': /* RI -- Reverse index */
892 if(term.c.y == term.top)
893 tscrolldown(1);
894 else
895 tmoveto(term.c.x, term.c.y-1);
896 term.esc = 0;
897 break;
898 case 'c': /* RIS -- Reset to inital state */
899 treset();
900 term.esc = 0;
901 break;
902 case '=': /* DECPAM */
903 term.mode |= MODE_APPKEYPAD;
904 term.esc = 0;
905 break;
906 case '>': /* DECPNM */
907 term.mode &= ~MODE_APPKEYPAD;
908 term.esc = 0;
909 break;
910 case '7':
911 tcursor(CURSOR_SAVE);
912 term.esc = 0;
913 break;
914 case '8':
915 tcursor(CURSOR_LOAD);
916 term.esc = 0;
917 break;
918 default:
919 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n", c, isprint(c)?c:'.');
920 term.esc = 0;
921 }
922 }
923 } else {
924 switch(c) {
925 case '\t':
926 tputtab();
927 break;
928 case '\b':
929 tmoveto(term.c.x-1, term.c.y);
930 break;
931 case '\r':
932 tmoveto(0, term.c.y);
933 break;
934 case '\n':
935 tnewline();
936 break;
937 case '\a':
938 xbell();
939 break;
940 case '\033':
941 csireset();
942 term.esc = ESC_START;
943 break;
944 default:
945 tsetchar(c);
946 if(term.c.x+1 < term.col) {
947 tmoveto(term.c.x+1, term.c.y);
948 } else if(IS_SET(MODE_WRAP))
949 tnewline();
950 break;
951 }
952 }
953 }
954
955 void
956 tputs(char *s, int len) {
957 for(; len > 0; len--)
958 tputc(*s++);
959 }
960
961 void
962 tresize(int col, int row) {
963 int i;
964 int minrow = MIN(row, term.row);
965 int mincol = MIN(col, term.col);
966
967 if(col < 1 || row < 1)
968 return;
969
970 /* free uneeded rows */
971 for(i = row; i < term.row; i++)
972 free(term.line[i]);
973
974 /* resize to new height */
975 term.line = realloc(term.line, row * sizeof(Line));
976
977 /* resize each row to new width, zero-pad if needed */
978 for(i = 0; i < minrow; i++) {
979 term.line[i] = realloc(term.line[i], col * sizeof(Glyph));
980 memset(term.line[i] + mincol, 0, (col - mincol) * sizeof(Glyph));
981 }
982
983 /* allocate any new rows */
984 for(/* i == minrow */; i < row; i++)
985 term.line[i] = calloc(col, sizeof(Glyph));
986
987 LIMIT(term.c.x, 0, col-1);
988 LIMIT(term.c.y, 0, row-1);
989 LIMIT(term.top, 0, row-1);
990 LIMIT(term.bot, 0, row-1);
991
992 term.bot = row-1;
993 term.col = col, term.row = row;
994 }
995
996 void
997 xloadcols(void) {
998 int i, r, g, b;
999 XColor color;
1000 Colormap cmap = DefaultColormap(xw.dis, xw.scr);
1001 unsigned long white = WhitePixel(xw.dis, xw.scr);
1002
1003 for(i = 0; i < 16; i++) {
1004 if (!XAllocNamedColor(xw.dis, cmap, colorname[i], &color, &color)) {
1005 dc.col[i] = white;
1006 fprintf(stderr, "Could not allocate color '%s'\n", colorname[i]);
1007 } else
1008 dc.col[i] = color.pixel;
1009 }
1010
1011 /* same colors as xterm */
1012 for(r = 0; r < 6; r++)
1013 for(g = 0; g < 6; g++)
1014 for(b = 0; b < 6; b++) {
1015 color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
1016 color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
1017 color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
1018 if (!XAllocColor(xw.dis, cmap, &color)) {
1019 dc.col[i] = white;
1020 fprintf(stderr, "Could not allocate color %d\n", i);
1021 } else
1022 dc.col[i] = color.pixel;
1023 i++;
1024 }
1025
1026 for(r = 0; r < 24; r++, i++) {
1027 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
1028 if (!XAllocColor(xw.dis, cmap, &color)) {
1029 dc.col[i] = white;
1030 fprintf(stderr, "Could not allocate color %d\n", i);
1031 } else
1032 dc.col[i] = color.pixel;
1033 }
1034 }
1035
1036 void
1037 xclear(int x1, int y1, int x2, int y2) {
1038 XSetForeground(xw.dis, dc.gc, dc.col[DefaultBG]);
1039 XFillRectangle(xw.dis, xw.buf, dc.gc,
1040 x1 * xw.cw, y1 * xw.ch,
1041 (x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch);
1042 }
1043
1044 void
1045 xhints(void)
1046 {
1047 XClassHint class = {TNAME, TNAME};
1048 XWMHints wm = {.flags = InputHint, .input = 1};
1049 XSizeHints size = {
1050 .flags = PSize | PResizeInc | PBaseSize,
1051 .height = xw.h,
1052 .width = xw.w,
1053 .height_inc = xw.ch,
1054 .width_inc = xw.cw,
1055 .base_height = 2*BORDER,
1056 .base_width = 2*BORDER,
1057 };
1058 XSetWMProperties(xw.dis, xw.win, NULL, NULL, NULL, 0, &size, &wm, &class);
1059 }
1060
1061 void
1062 xinit(void) {
1063 if(!(xw.dis = XOpenDisplay(NULL)))
1064 die("Can't open display\n");
1065 xw.scr = XDefaultScreen(xw.dis);
1066
1067 /* font */
1068 if(!(dc.font = XLoadQueryFont(xw.dis, FONT)) || !(dc.bfont = XLoadQueryFont(xw.dis, BOLDFONT)))
1069 die("Can't load font %s\n", dc.font ? BOLDFONT : FONT);
1070
1071 /* XXX: Assuming same size for bold font */
1072 xw.cw = dc.font->max_bounds.rbearing - dc.font->min_bounds.lbearing;
1073 xw.ch = dc.font->ascent + dc.font->descent;
1074
1075 /* colors */
1076 xloadcols();
1077
1078 term.c.attr.fg = DefaultFG;
1079 term.c.attr.bg = DefaultBG;
1080 term.c.attr.mode = ATTR_NULL;
1081 /* windows */
1082 xw.h = term.row * xw.ch + 2*BORDER;
1083 xw.w = term.col * xw.cw + 2*BORDER;
1084 xw.win = XCreateSimpleWindow(xw.dis, XRootWindow(xw.dis, xw.scr), 0, 0,
1085 xw.w, xw.h, 0,
1086 dc.col[DefaultBG],
1087 dc.col[DefaultBG]);
1088 xw.bufw = xw.w - 2*BORDER;
1089 xw.bufh = xw.h - 2*BORDER;
1090 xw.buf = XCreatePixmap(xw.dis, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dis, xw.scr));
1091 /* gc */
1092 dc.gc = XCreateGC(xw.dis, xw.win, 0, NULL);
1093 XMapWindow(xw.dis, xw.win);
1094 xhints();
1095 XStoreName(xw.dis, xw.win, "st");
1096 XSync(xw.dis, 0);
1097 }
1098
1099 void
1100 xdraws(char *s, Glyph base, int x, int y, int len) {
1101 unsigned long xfg, xbg;
1102 int winx = x*xw.cw, winy = y*xw.ch + dc.font->ascent, width = len*xw.cw;
1103 int i;
1104
1105 if(base.mode & ATTR_REVERSE)
1106 xfg = dc.col[base.bg], xbg = dc.col[base.fg];
1107 else
1108 xfg = dc.col[base.fg], xbg = dc.col[base.bg];
1109
1110 XSetBackground(xw.dis, dc.gc, xbg);
1111 XSetForeground(xw.dis, dc.gc, xfg);
1112
1113 if(base.mode & ATTR_GFX)
1114 for(i = 0; i < len; i++)
1115 s[i] = gfx[(int)s[i]];
1116
1117 XSetFont(xw.dis, dc.gc, base.mode & ATTR_BOLD ? dc.bfont->fid : dc.font->fid);
1118 XDrawImageString(xw.dis, xw.buf, dc.gc, winx, winy, s, len);
1119
1120 if(base.mode & ATTR_UNDERLINE)
1121 XDrawLine(xw.dis, xw.buf, dc.gc, winx, winy+1, winx+width-1, winy+1);
1122 }
1123
1124 void
1125 xcursor(int mode) {
1126 static int oldx = 0;
1127 static int oldy = 0;
1128 Glyph g = {' ', ATTR_NULL, DefaultBG, DefaultCS, 0};
1129
1130 LIMIT(oldx, 0, term.col-1);
1131 LIMIT(oldy, 0, term.row-1);
1132
1133 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
1134 g.c = term.line[term.c.y][term.c.x].c;
1135
1136 /* remove the old cursor */
1137 if(term.line[oldy][oldx].state & GLYPH_SET)
1138 xdraws(&term.line[oldy][oldx].c, term.line[oldy][oldx], oldx, oldy, 1);
1139 else
1140 xclear(oldx, oldy, oldx, oldy);
1141
1142 /* draw the new one */
1143 if(mode == CURSOR_DRAW) {
1144 xdraws(&g.c, g, term.c.x, term.c.y, 1);
1145 oldx = term.c.x, oldy = term.c.y;
1146 }
1147 }
1148
1149 #ifdef DEBUG
1150 /* basic drawing routines */
1151 void
1152 xdrawc(int x, int y, Glyph g) {
1153 XRectangle r = { x * xw.cw, y * xw.ch, xw.cw, xw.ch };
1154 XSetBackground(xw.dis, dc.gc, dc.col[g.bg]);
1155 XSetForeground(xw.dis, dc.gc, dc.col[g.fg]);
1156 XSetFont(xw.dis, dc.gc, g.mode & ATTR_BOLD ? dc.bfont->fid : dc.font->fid);
1157 XDrawImageString(xw.dis, xw.buf, dc.gc, r.x, r.y+dc.font->ascent, &g.c, 1);
1158 }
1159
1160 void
1161 draw(int dummy) {
1162 int x, y;
1163
1164 xclear(0, 0, term.col-1, term.row-1);
1165 for(y = 0; y < term.row; y++)
1166 for(x = 0; x < term.col; x++)
1167 if(term.line[y][x].state & GLYPH_SET)
1168 xdrawc(x, y, term.line[y][x]);
1169
1170 xcursor(term.c.hide);
1171 XCopyArea(xw.dis, xw.buf, xw.win, dc.gc, 0, 0, xw.bufw, xw.bufh, BORDER, BORDER);
1172 XFlush(xw.dis);
1173 }
1174
1175 #else
1176 /* optimized drawing routine */
1177 void
1178 draw(int redraw_all) {
1179 int i, x, y, ox;
1180 Glyph base, new;
1181 char buf[DRAW_BUF_SIZ];
1182
1183 XSetForeground(xw.dis, dc.gc, dc.col[DefaultBG]);
1184 XFillRectangle(xw.dis, xw.buf, dc.gc, 0, 0, xw.bufw, xw.bufh);
1185 for(y = 0; y < term.row; y++) {
1186 base = term.line[y][0];
1187 i = ox = 0;
1188 for(x = 0; x < term.col; x++) {
1189 new = term.line[y][x];
1190 if(i > 0 && (!(new.state & GLYPH_SET) || ATTRCMP(base, new) ||
1191 i >= DRAW_BUF_SIZ)) {
1192 xdraws(buf, base, ox, y, i);
1193 i = 0;
1194 }
1195 if(new.state & GLYPH_SET) {
1196 if(i == 0) {
1197 ox = x;
1198 base = new;
1199 }
1200 buf[i++] = new.c;
1201 }
1202 }
1203 if(i > 0)
1204 xdraws(buf, base, ox, y, i);
1205 }
1206 xcursor(term.c.hide);
1207 XCopyArea(xw.dis, xw.buf, xw.win, dc.gc, 0, 0, xw.bufw, xw.bufh, BORDER, BORDER);
1208 XFlush(xw.dis);
1209 }
1210
1211 #endif
1212
1213 void
1214 expose(XEvent *ev) {
1215 draw(SCREEN_REDRAW);
1216 }
1217
1218 char*
1219 kmap(KeySym k) {
1220 int i;
1221 for(i = 0; i < LEN(key); i++)
1222 if(key[i].k == k)
1223 return (char*)key[i].s;
1224 return NULL;
1225 }
1226
1227 void
1228 kpress(XEvent *ev) {
1229 XKeyEvent *e = &ev->xkey;
1230 KeySym ksym;
1231 char buf[32];
1232 char *customkey;
1233 int len;
1234 int meta;
1235 int shift;
1236
1237 meta = e->state & Mod1Mask;
1238 shift = e->state & ShiftMask;
1239 len = XLookupString(e, buf, sizeof(buf), &ksym, NULL);
1240
1241 if((customkey = kmap(ksym)))
1242 ttywrite(customkey, strlen(customkey));
1243 else if(len > 0) {
1244 buf[sizeof(buf)-1] = '\0';
1245 if(meta && len == 1)
1246 ttywrite("\033", 1);
1247 ttywrite(buf, len);
1248 } else
1249 switch(ksym) {
1250 case XK_Up:
1251 case XK_Down:
1252 case XK_Left:
1253 case XK_Right:
1254 sprintf(buf, "\033%c%c", IS_SET(MODE_APPKEYPAD) ? 'O' : '[', "DACB"[ksym - XK_Left]);
1255 ttywrite(buf, 3);
1256 break;
1257 case XK_Insert:
1258 if(shift)
1259 draw(1), puts("draw!")/* XXX: paste X clipboard */;
1260 break;
1261 default:
1262 fprintf(stderr, "errkey: %d\n", (int)ksym);
1263 break;
1264 }
1265 }
1266
1267 void
1268 resize(XEvent *e) {
1269 int col, row;
1270
1271 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
1272 return;
1273
1274 xw.w = e->xconfigure.width;
1275 xw.h = e->xconfigure.height;
1276 xw.bufw = xw.w - 2*BORDER;
1277 xw.bufh = xw.h - 2*BORDER;
1278 col = xw.bufw / xw.cw;
1279 row = xw.bufh / xw.ch;
1280 tresize(col, row);
1281 ttyresize(col, row);
1282 XFreePixmap(xw.dis, xw.buf);
1283 xw.buf = XCreatePixmap(xw.dis, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dis, xw.scr));
1284 draw(SCREEN_REDRAW);
1285 }
1286
1287 void
1288 run(void) {
1289 XEvent ev;
1290 fd_set rfd;
1291 int xfd = XConnectionNumber(xw.dis);
1292
1293 running = 1;
1294 XSelectInput(xw.dis, xw.win, ExposureMask | KeyPressMask | StructureNotifyMask);
1295 XResizeWindow(xw.dis, xw.win, xw.w, xw.h); /* XXX: fix resize bug in wmii (?) */
1296
1297 while(running) {
1298 FD_ZERO(&rfd);
1299 FD_SET(cmdfd, &rfd);
1300 FD_SET(xfd, &rfd);
1301 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, NULL) < 0) {
1302 if(errno == EINTR)
1303 continue;
1304 die("select failed: %s\n", SERRNO);
1305 }
1306 if(FD_ISSET(cmdfd, &rfd)) {
1307 ttyread();
1308 draw(SCREEN_UPDATE);
1309 }
1310 while(XPending(xw.dis)) {
1311 XNextEvent(xw.dis, &ev);
1312 if(handler[ev.type])
1313 (handler[ev.type])(&ev);
1314 }
1315 }
1316 }
1317
1318 int
1319 main(int argc, char *argv[]) {
1320 if(argc == 2 && !strncmp("-v", argv[1], 3))
1321 die("st-" VERSION ", (c) 2010 st engineers\n");
1322 else if(argc != 1)
1323 die("usage: st [-v]\n");
1324 setlocale(LC_CTYPE, "");
1325 tnew(80, 24);
1326 ttynew();
1327 xinit();
1328 run();
1329 return 0;
1330 }