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[st.git] / st.c
1 /* See LICENSE for licence details. */
2 #define _XOPEN_SOURCE 600
3 #include <ctype.h>
4 #include <errno.h>
5 #include <fcntl.h>
6 #include <limits.h>
7 #include <locale.h>
8 #include <stdarg.h>
9 #include <stdio.h>
10 #include <stdlib.h>
11 #include <string.h>
12 #include <signal.h>
13 #include <sys/ioctl.h>
14 #include <sys/select.h>
15 #include <sys/stat.h>
16 #include <sys/types.h>
17 #include <sys/wait.h>
18 #include <unistd.h>
19 #include <X11/Xlib.h>
20 #include <X11/Xatom.h>
21 #include <X11/keysym.h>
22 #include <X11/Xutil.h>
23
24 #if defined(__linux)
25 #include <pty.h>
26 #elif defined(__OpenBSD__) || defined(__NetBSD__)
27 #include <util.h>
28 #elif defined(__FreeBSD__) || defined(__DragonFly__)
29 #include <libutil.h>
30 #endif
31
32 #define USAGE \
33 "st-" VERSION ", (c) 2010 st engineers\n" \
34 "usage: st [-t title] [-c class] [-e cmd] [-v]\n"
35
36 /* Arbitrary sizes */
37 #define ESC_TITLE_SIZ 256
38 #define ESC_BUF_SIZ 256
39 #define ESC_ARG_SIZ 16
40 #define DRAW_BUF_SIZ 1024
41 #define UTF_SIZ 4
42
43 #define SERRNO strerror(errno)
44 #define MIN(a, b) ((a) < (b) ? (a) : (b))
45 #define MAX(a, b) ((a) < (b) ? (b) : (a))
46 #define LEN(a) (sizeof(a) / sizeof(a[0]))
47 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
48 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
49 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
50 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
51 #define IS_SET(flag) (term.mode & (flag))
52
53 /* Attribute, Cursor, Character state, Terminal mode, Screen draw mode */
54 enum { ATTR_NULL=0 , ATTR_REVERSE=1 , ATTR_UNDERLINE=2, ATTR_BOLD=4, ATTR_GFX=8 };
55 enum { CURSOR_UP, CURSOR_DOWN, CURSOR_LEFT, CURSOR_RIGHT,
56 CURSOR_SAVE, CURSOR_LOAD };
57 enum { CURSOR_DEFAULT = 0, CURSOR_HIDE = 1, CURSOR_WRAPNEXT = 2 };
58 enum { GLYPH_SET=1, GLYPH_DIRTY=2 };
59 enum { MODE_WRAP=1, MODE_INSERT=2, MODE_APPKEYPAD=4, MODE_ALTSCREEN=8,
60 MODE_CRLF=16 };
61 enum { ESC_START=1, ESC_CSI=2, ESC_OSC=4, ESC_TITLE=8, ESC_ALTCHARSET=16 };
62 enum { SCREEN_UPDATE, SCREEN_REDRAW };
63 enum { WIN_VISIBLE=1, WIN_REDRAW=2, WIN_FOCUSED=4 };
64
65 #undef B0
66 enum { B0=1, B1=2, B2=4, B3=8, B4=16, B5=32, B6=64, B7=128 };
67
68 typedef struct {
69 char c[UTF_SIZ]; /* character code */
70 char mode; /* attribute flags */
71 int fg; /* foreground */
72 int bg; /* background */
73 char state; /* state flags */
74 } Glyph;
75
76 typedef Glyph* Line;
77
78 typedef struct {
79 Glyph attr; /* current char attributes */
80 int x;
81 int y;
82 char state;
83 } TCursor;
84
85 /* CSI Escape sequence structs */
86 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
87 typedef struct {
88 char buf[ESC_BUF_SIZ]; /* raw string */
89 int len; /* raw string length */
90 char priv;
91 int arg[ESC_ARG_SIZ];
92 int narg; /* nb of args */
93 char mode;
94 } CSIEscape;
95
96 /* Internal representation of the screen */
97 typedef struct {
98 int row; /* nb row */
99 int col; /* nb col */
100 Line* line; /* screen */
101 Line* alt; /* alternate screen */
102 TCursor c; /* cursor */
103 int top; /* top scroll limit */
104 int bot; /* bottom scroll limit */
105 int mode; /* terminal mode flags */
106 int esc; /* escape state flags */
107 char title[ESC_TITLE_SIZ];
108 int titlelen;
109 } Term;
110
111 /* Purely graphic info */
112 typedef struct {
113 Display* dis;
114 Colormap cmap;
115 Window win;
116 Pixmap buf;
117 XIM xim;
118 XIC xic;
119 int scr;
120 int w; /* window width */
121 int h; /* window height */
122 int bufw; /* pixmap width */
123 int bufh; /* pixmap height */
124 int ch; /* char height */
125 int cw; /* char width */
126 char state; /* focus, redraw, visible */
127 } XWindow;
128
129 typedef struct {
130 KeySym k;
131 char s[ESC_BUF_SIZ];
132 } Key;
133
134 /* Drawing Context */
135 typedef struct {
136 unsigned long col[256];
137 GC gc;
138 struct {
139 int ascent;
140 int descent;
141 short lbearing;
142 short rbearing;
143 XFontSet set;
144 } font, bfont;
145 } DC;
146
147 /* TODO: use better name for vars... */
148 typedef struct {
149 int mode;
150 int bx, by;
151 int ex, ey;
152 struct {int x, y;} b, e;
153 char *clip;
154 } Selection;
155
156 #include "config.h"
157
158 static void die(const char *errstr, ...);
159 static void draw(int);
160 static void execsh(void);
161 static void sigchld(int);
162 static void run(void);
163
164 static void csidump(void);
165 static void csihandle(void);
166 static void csiparse(void);
167 static void csireset(void);
168
169 static void tclearregion(int, int, int, int);
170 static void tcursor(int);
171 static void tdeletechar(int);
172 static void tdeleteline(int);
173 static void tinsertblank(int);
174 static void tinsertblankline(int);
175 static void tmoveto(int, int);
176 static void tnew(int, int);
177 static void tnewline(int);
178 static void tputtab(void);
179 static void tputc(char*);
180 static void treset(void);
181 static int tresize(int, int);
182 static void tscrollup(int, int);
183 static void tscrolldown(int, int);
184 static void tsetattr(int*, int);
185 static void tsetchar(char*);
186 static void tsetscroll(int, int);
187 static void tswapscreen(void);
188
189 static void ttynew(void);
190 static void ttyread(void);
191 static void ttyresize(int, int);
192 static void ttywrite(const char *, size_t);
193
194 static void xdraws(char *, Glyph, int, int, int, int);
195 static void xhints(void);
196 static void xclear(int, int, int, int);
197 static void xdrawcursor(void);
198 static void xinit(void);
199 static void xloadcols(void);
200 static void xseturgency(int);
201 static void xsetsel(char*);
202 static void xresize(int, int);
203
204 static void expose(XEvent *);
205 static void visibility(XEvent *);
206 static void unmap(XEvent *);
207 static char* kmap(KeySym);
208 static void kpress(XEvent *);
209 static void resize(XEvent *);
210 static void focus(XEvent *);
211 static void brelease(XEvent *);
212 static void bpress(XEvent *);
213 static void bmotion(XEvent *);
214 static void selnotify(XEvent *);
215 static void selrequest(XEvent *);
216
217 static void selinit(void);
218 static inline int selected(int, int);
219 static void selcopy(void);
220 static void selpaste(void);
221
222 static int utf8decode(char *, long *);
223 static int utf8encode(long *, char *);
224 static int utf8size(char *);
225 static int isfullutf8(char *, int);
226
227 static void (*handler[LASTEvent])(XEvent *) = {
228 [KeyPress] = kpress,
229 [ConfigureNotify] = resize,
230 [VisibilityNotify] = visibility,
231 [UnmapNotify] = unmap,
232 [Expose] = expose,
233 [FocusIn] = focus,
234 [FocusOut] = focus,
235 [MotionNotify] = bmotion,
236 [ButtonPress] = bpress,
237 [ButtonRelease] = brelease,
238 [SelectionNotify] = selnotify,
239 [SelectionRequest] = selrequest,
240 };
241
242 /* Globals */
243 static DC dc;
244 static XWindow xw;
245 static Term term;
246 static CSIEscape escseq;
247 static int cmdfd;
248 static pid_t pid;
249 static Selection sel;
250 static char *opt_cmd = NULL;
251 static char *opt_title = NULL;
252 static char *opt_class = NULL;
253
254 int
255 utf8decode(char *s, long *u) {
256 unsigned char c;
257 int i, n, rtn;
258
259 rtn = 1;
260 c = *s;
261 if(~c&B7) { /* 0xxxxxxx */
262 *u = c;
263 return rtn;
264 } else if((c&(B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */
265 *u = c&(B4|B3|B2|B1|B0);
266 n = 1;
267 } else if((c&(B7|B6|B5|B4)) == (B7|B6|B5)) { /* 1110xxxx */
268 *u = c&(B3|B2|B1|B0);
269 n = 2;
270 } else if((c&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) { /* 11110xxx */
271 *u = c&(B2|B1|B0);
272 n = 3;
273 } else
274 goto invalid;
275 for(i=n,++s; i>0; --i,++rtn,++s) {
276 c = *s;
277 if((c&(B7|B6)) != B7) /* 10xxxxxx */
278 goto invalid;
279 *u <<= 6;
280 *u |= c&(B5|B4|B3|B2|B1|B0);
281 }
282 if((n == 1 && *u < 0x80) ||
283 (n == 2 && *u < 0x800) ||
284 (n == 3 && *u < 0x10000) ||
285 (*u >= 0xD800 && *u <= 0xDFFF))
286 goto invalid;
287 return rtn;
288 invalid:
289 *u = 0xFFFD;
290 return rtn;
291 }
292
293 int
294 utf8encode(long *u, char *s) {
295 unsigned char *sp;
296 unsigned long uc;
297 int i, n;
298
299 sp = (unsigned char*) s;
300 uc = *u;
301 if(uc < 0x80) {
302 *sp = uc; /* 0xxxxxxx */
303 return 1;
304 } else if(*u < 0x800) {
305 *sp = (uc >> 6) | (B7|B6); /* 110xxxxx */
306 n = 1;
307 } else if(uc < 0x10000) {
308 *sp = (uc >> 12) | (B7|B6|B5); /* 1110xxxx */
309 n = 2;
310 } else if(uc <= 0x10FFFF) {
311 *sp = (uc >> 18) | (B7|B6|B5|B4); /* 11110xxx */
312 n = 3;
313 } else {
314 goto invalid;
315 }
316 for(i=n,++sp; i>0; --i,++sp)
317 *sp = ((uc >> 6*(i-1)) & (B5|B4|B3|B2|B1|B0)) | B7; /* 10xxxxxx */
318 return n+1;
319 invalid:
320 /* U+FFFD */
321 *s++ = '\xEF';
322 *s++ = '\xBF';
323 *s = '\xBD';
324 return 3;
325 }
326
327 /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
328 UTF-8 otherwise return 0 */
329 int
330 isfullutf8(char *s, int b) {
331 unsigned char *c1, *c2, *c3;
332
333 c1 = (unsigned char *) s;
334 c2 = (unsigned char *) ++s;
335 c3 = (unsigned char *) ++s;
336 if(b < 1)
337 return 0;
338 else if((*c1&(B7|B6|B5)) == (B7|B6) && b == 1)
339 return 0;
340 else if((*c1&(B7|B6|B5|B4)) == (B7|B6|B5) &&
341 ((b == 1) ||
342 ((b == 2) && (*c2&(B7|B6)) == B7)))
343 return 0;
344 else if((*c1&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4) &&
345 ((b == 1) ||
346 ((b == 2) && (*c2&(B7|B6)) == B7) ||
347 ((b == 3) && (*c2&(B7|B6)) == B7 && (*c3&(B7|B6)) == B7)))
348 return 0;
349 else
350 return 1;
351 }
352
353 int
354 utf8size(char *s) {
355 unsigned char c = *s;
356
357 if (~c&B7)
358 return 1;
359 else if ((c&(B7|B6|B5)) == (B7|B6))
360 return 2;
361 else if ((c&(B7|B6|B5|B4)) == (B7|B6|B5))
362 return 3;
363 else
364 return 4;
365 }
366
367 void
368 selinit(void) {
369 sel.mode = 0;
370 sel.bx = -1;
371 sel.clip = NULL;
372 }
373
374 static inline int
375 selected(int x, int y) {
376 if(sel.ey == y && sel.by == y) {
377 int bx = MIN(sel.bx, sel.ex);
378 int ex = MAX(sel.bx, sel.ex);
379 return BETWEEN(x, bx, ex);
380 }
381 return ((sel.b.y < y&&y < sel.e.y) || (y==sel.e.y && x<=sel.e.x))
382 || (y==sel.b.y && x>=sel.b.x && (x<=sel.e.x || sel.b.y!=sel.e.y));
383 }
384
385 void
386 getbuttoninfo(XEvent *e, int *b, int *x, int *y) {
387 if(b)
388 *b = e->xbutton.button;
389
390 *x = e->xbutton.x/xw.cw;
391 *y = e->xbutton.y/xw.ch;
392 sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
393 sel.b.y = MIN(sel.by, sel.ey);
394 sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
395 sel.e.y = MAX(sel.by, sel.ey);
396 }
397
398 void
399 bpress(XEvent *e) {
400 sel.mode = 1;
401 sel.ex = sel.bx = e->xbutton.x/xw.cw;
402 sel.ey = sel.by = e->xbutton.y/xw.ch;
403 }
404
405 void
406 selcopy(void) {
407 char *str, *ptr;
408 int ls, x, y, sz, sl;
409
410 if(sel.bx == -1)
411 str = NULL;
412 else {
413 sz = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
414 ptr = str = malloc(sz);
415 for(y = 0; y < term.row; y++) {
416 for(x = 0; x < term.col; x++)
417 if(term.line[y][x].state & GLYPH_SET && (ls = selected(x, y))) {
418 sl = utf8size(term.line[y][x].c);
419 memcpy(ptr, term.line[y][x].c, sl);
420 ptr += sl;
421 }
422 if(ls)
423 *ptr = '\n', ptr++;
424 }
425 *ptr = 0;
426 }
427 xsetsel(str);
428 }
429
430 void
431 selnotify(XEvent *e) {
432 unsigned long nitems;
433 unsigned long ofs, rem;
434 int format;
435 unsigned char *data;
436 Atom type;
437
438 ofs = 0;
439 do {
440 if(XGetWindowProperty(xw.dis, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
441 False, AnyPropertyType, &type, &format,
442 &nitems, &rem, &data)) {
443 fprintf(stderr, "Clipboard allocation failed\n");
444 return;
445 }
446 ttywrite((const char *) data, nitems * format / 8);
447 XFree(data);
448 /* number of 32-bit chunks returned */
449 ofs += nitems * format / 32;
450 } while(rem > 0);
451 }
452
453 void
454 selpaste() {
455 XConvertSelection(xw.dis, XA_PRIMARY, XA_STRING, XA_PRIMARY, xw.win, CurrentTime);
456 }
457
458 void
459 selrequest(XEvent *e) {
460 XSelectionRequestEvent *xsre;
461 XSelectionEvent xev;
462 Atom xa_targets;
463
464 xsre = (XSelectionRequestEvent *) e;
465 xev.type = SelectionNotify;
466 xev.requestor = xsre->requestor;
467 xev.selection = xsre->selection;
468 xev.target = xsre->target;
469 xev.time = xsre->time;
470 /* reject */
471 xev.property = None;
472
473 xa_targets = XInternAtom(xw.dis, "TARGETS", 0);
474 if(xsre->target == xa_targets) {
475 /* respond with the supported type */
476 Atom string = XA_STRING;
477 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
478 XA_ATOM, 32, PropModeReplace,
479 (unsigned char *) &string, 1);
480 xev.property = xsre->property;
481 } else if(xsre->target == XA_STRING) {
482 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
483 xsre->target, 8, PropModeReplace,
484 (unsigned char *) sel.clip, strlen(sel.clip));
485 xev.property = xsre->property;
486 }
487
488 /* all done, send a notification to the listener */
489 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
490 fprintf(stderr, "Error sending SelectionNotify event\n");
491 }
492
493 void
494 xsetsel(char *str) {
495 /* register the selection for both the clipboard and the primary */
496 Atom clipboard;
497
498 free(sel.clip);
499 sel.clip = str;
500
501 XSetSelectionOwner(xw.dis, XA_PRIMARY, xw.win, CurrentTime);
502
503 clipboard = XInternAtom(xw.dis, "CLIPBOARD", 0);
504 XSetSelectionOwner(xw.dis, clipboard, xw.win, CurrentTime);
505
506 XFlush(xw.dis);
507 }
508
509 /* TODO: doubleclick to select word */
510 void
511 brelease(XEvent *e) {
512 int b;
513 sel.mode = 0;
514 getbuttoninfo(e, &b, &sel.ex, &sel.ey);
515 if(sel.bx==sel.ex && sel.by==sel.ey) {
516 sel.bx = -1;
517 if(b==2)
518 selpaste();
519 } else {
520 if(b==1)
521 selcopy();
522 }
523 draw(1);
524 }
525
526 void
527 bmotion(XEvent *e) {
528 if (sel.mode) {
529 getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
530 /* XXX: draw() can't keep up, disabled for now.
531 selection is visible on button release.
532 draw(1); */
533 }
534 }
535
536 void
537 die(const char *errstr, ...) {
538 va_list ap;
539
540 va_start(ap, errstr);
541 vfprintf(stderr, errstr, ap);
542 va_end(ap);
543 exit(EXIT_FAILURE);
544 }
545
546 void
547 execsh(void) {
548 char *args[] = {getenv("SHELL"), "-i", NULL};
549 if(opt_cmd)
550 args[0] = opt_cmd, args[1] = NULL;
551 else
552 DEFAULT(args[0], SHELL);
553 putenv("TERM="TNAME);
554 execvp(args[0], args);
555 }
556
557 void
558 sigchld(int a) {
559 int stat = 0;
560 if(waitpid(pid, &stat, 0) < 0)
561 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
562 if(WIFEXITED(stat))
563 exit(WEXITSTATUS(stat));
564 else
565 exit(EXIT_FAILURE);
566 }
567
568 void
569 ttynew(void) {
570 int m, s;
571
572 /* seems to work fine on linux, openbsd and freebsd */
573 struct winsize w = {term.row, term.col, 0, 0};
574 if(openpty(&m, &s, NULL, NULL, &w) < 0)
575 die("openpty failed: %s\n", SERRNO);
576
577 switch(pid = fork()) {
578 case -1:
579 die("fork failed\n");
580 break;
581 case 0:
582 setsid(); /* create a new process group */
583 dup2(s, STDIN_FILENO);
584 dup2(s, STDOUT_FILENO);
585 dup2(s, STDERR_FILENO);
586 if(ioctl(s, TIOCSCTTY, NULL) < 0)
587 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
588 close(s);
589 close(m);
590 execsh();
591 break;
592 default:
593 close(s);
594 cmdfd = m;
595 signal(SIGCHLD, sigchld);
596 }
597 }
598
599 void
600 dump(char c) {
601 static int col;
602 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
603 if(++col % 10 == 0)
604 fprintf(stderr, "\n");
605 }
606
607 void
608 ttyread(void) {
609 char buf[BUFSIZ], *ptr;
610 char s[UTF_SIZ];
611 int ret, br;
612 static int buflen = 0;
613 long u;
614
615 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
616 die("Couldn't read from shell: %s\n", SERRNO);
617 else {
618 buflen += ret;
619 for(ptr=buf; buflen>=UTF_SIZ||isfullutf8(ptr,buflen); buflen-=br) {
620 br = utf8decode(ptr, &u);
621 utf8encode(&u, s);
622 tputc(s);
623 ptr += br;
624 }
625 memcpy(buf, ptr, buflen);
626 }
627 }
628
629 void
630 ttywrite(const char *s, size_t n) {
631 if(write(cmdfd, s, n) == -1)
632 die("write error on tty: %s\n", SERRNO);
633 }
634
635 void
636 ttyresize(int x, int y) {
637 struct winsize w;
638
639 w.ws_row = term.row;
640 w.ws_col = term.col;
641 w.ws_xpixel = w.ws_ypixel = 0;
642 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
643 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
644 }
645
646 void
647 tcursor(int mode) {
648 static TCursor c;
649
650 if(mode == CURSOR_SAVE)
651 c = term.c;
652 else if(mode == CURSOR_LOAD)
653 term.c = c, tmoveto(c.x, c.y);
654 }
655
656 void
657 treset(void) {
658 term.c = (TCursor){{
659 .mode = ATTR_NULL,
660 .fg = DefaultFG,
661 .bg = DefaultBG
662 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
663
664 term.top = 0, term.bot = term.row - 1;
665 term.mode = MODE_WRAP;
666 tclearregion(0, 0, term.col-1, term.row-1);
667 }
668
669 void
670 tnew(int col, int row) {
671 /* set screen size */
672 term.row = row, term.col = col;
673 term.line = malloc(term.row * sizeof(Line));
674 term.alt = malloc(term.row * sizeof(Line));
675 for(row = 0 ; row < term.row; row++) {
676 term.line[row] = malloc(term.col * sizeof(Glyph));
677 term.alt [row] = malloc(term.col * sizeof(Glyph));
678 }
679 /* setup screen */
680 treset();
681 }
682
683 void
684 tswapscreen(void) {
685 Line* tmp = term.line;
686 term.line = term.alt;
687 term.alt = tmp;
688 term.mode ^= MODE_ALTSCREEN;
689 }
690
691 void
692 tscrolldown(int orig, int n) {
693 int i;
694 Line temp;
695
696 LIMIT(n, 0, term.bot-orig+1);
697
698 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
699
700 for(i = term.bot; i >= orig+n; i--) {
701 temp = term.line[i];
702 term.line[i] = term.line[i-n];
703 term.line[i-n] = temp;
704 }
705 }
706
707 void
708 tscrollup(int orig, int n) {
709 int i;
710 Line temp;
711 LIMIT(n, 0, term.bot-orig+1);
712
713 tclearregion(0, orig, term.col-1, orig+n-1);
714
715 for(i = orig; i <= term.bot-n; i++) {
716 temp = term.line[i];
717 term.line[i] = term.line[i+n];
718 term.line[i+n] = temp;
719 }
720 }
721
722 void
723 tnewline(int first_col) {
724 int y = term.c.y;
725 if(y == term.bot)
726 tscrollup(term.top, 1);
727 else
728 y++;
729 tmoveto(first_col ? 0 : term.c.x, y);
730 }
731
732 void
733 csiparse(void) {
734 /* int noarg = 1; */
735 char *p = escseq.buf;
736
737 escseq.narg = 0;
738 if(*p == '?')
739 escseq.priv = 1, p++;
740
741 while(p < escseq.buf+escseq.len) {
742 while(isdigit(*p)) {
743 escseq.arg[escseq.narg] *= 10;
744 escseq.arg[escseq.narg] += *p++ - '0'/*, noarg = 0 */;
745 }
746 if(*p == ';' && escseq.narg+1 < ESC_ARG_SIZ)
747 escseq.narg++, p++;
748 else {
749 escseq.mode = *p;
750 escseq.narg++;
751 return;
752 }
753 }
754 }
755
756 void
757 tmoveto(int x, int y) {
758 LIMIT(x, 0, term.col-1);
759 LIMIT(y, 0, term.row-1);
760 term.c.state &= ~CURSOR_WRAPNEXT;
761 term.c.x = x;
762 term.c.y = y;
763 }
764
765 void
766 tsetchar(char *c) {
767 term.line[term.c.y][term.c.x] = term.c.attr;
768 memcpy(term.line[term.c.y][term.c.x].c, c, UTF_SIZ);
769 term.line[term.c.y][term.c.x].state |= GLYPH_SET;
770 }
771
772 void
773 tclearregion(int x1, int y1, int x2, int y2) {
774 int x, y, temp;
775
776 if(x1 > x2)
777 temp = x1, x1 = x2, x2 = temp;
778 if(y1 > y2)
779 temp = y1, y1 = y2, y2 = temp;
780
781 LIMIT(x1, 0, term.col-1);
782 LIMIT(x2, 0, term.col-1);
783 LIMIT(y1, 0, term.row-1);
784 LIMIT(y2, 0, term.row-1);
785
786 for(y = y1; y <= y2; y++)
787 for(x = x1; x <= x2; x++)
788 term.line[y][x].state = 0;
789 }
790
791 void
792 tdeletechar(int n) {
793 int src = term.c.x + n;
794 int dst = term.c.x;
795 int size = term.col - src;
796
797 if(src >= term.col) {
798 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
799 return;
800 }
801 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
802 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
803 }
804
805 void
806 tinsertblank(int n) {
807 int src = term.c.x;
808 int dst = src + n;
809 int size = term.col - dst;
810
811 if(dst >= term.col) {
812 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
813 return;
814 }
815 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
816 tclearregion(src, term.c.y, dst - 1, term.c.y);
817 }
818
819 void
820 tinsertblankline(int n) {
821 if(term.c.y < term.top || term.c.y > term.bot)
822 return;
823
824 tscrolldown(term.c.y, n);
825 }
826
827 void
828 tdeleteline(int n) {
829 if(term.c.y < term.top || term.c.y > term.bot)
830 return;
831
832 tscrollup(term.c.y, n);
833 }
834
835 void
836 tsetattr(int *attr, int l) {
837 int i;
838
839 for(i = 0; i < l; i++) {
840 switch(attr[i]) {
841 case 0:
842 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD);
843 term.c.attr.fg = DefaultFG;
844 term.c.attr.bg = DefaultBG;
845 break;
846 case 1:
847 term.c.attr.mode |= ATTR_BOLD;
848 break;
849 case 4:
850 term.c.attr.mode |= ATTR_UNDERLINE;
851 break;
852 case 7:
853 term.c.attr.mode |= ATTR_REVERSE;
854 break;
855 case 22:
856 term.c.attr.mode &= ~ATTR_BOLD;
857 break;
858 case 24:
859 term.c.attr.mode &= ~ATTR_UNDERLINE;
860 break;
861 case 27:
862 term.c.attr.mode &= ~ATTR_REVERSE;
863 break;
864 case 38:
865 if (i + 2 < l && attr[i + 1] == 5) {
866 i += 2;
867 if (BETWEEN(attr[i], 0, 255))
868 term.c.attr.fg = attr[i];
869 else
870 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[i]);
871 }
872 else
873 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
874 break;
875 case 39:
876 term.c.attr.fg = DefaultFG;
877 break;
878 case 48:
879 if (i + 2 < l && attr[i + 1] == 5) {
880 i += 2;
881 if (BETWEEN(attr[i], 0, 255))
882 term.c.attr.bg = attr[i];
883 else
884 fprintf(stderr, "erresc: bad bgcolor %d\n", attr[i]);
885 }
886 else
887 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
888 break;
889 case 49:
890 term.c.attr.bg = DefaultBG;
891 break;
892 default:
893 if(BETWEEN(attr[i], 30, 37))
894 term.c.attr.fg = attr[i] - 30;
895 else if(BETWEEN(attr[i], 40, 47))
896 term.c.attr.bg = attr[i] - 40;
897 else if(BETWEEN(attr[i], 90, 97))
898 term.c.attr.fg = attr[i] - 90 + 8;
899 else if(BETWEEN(attr[i], 100, 107))
900 term.c.attr.fg = attr[i] - 100 + 8;
901 else
902 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]), csidump();
903
904 break;
905 }
906 }
907 }
908
909 void
910 tsetscroll(int t, int b) {
911 int temp;
912
913 LIMIT(t, 0, term.row-1);
914 LIMIT(b, 0, term.row-1);
915 if(t > b) {
916 temp = t;
917 t = b;
918 b = temp;
919 }
920 term.top = t;
921 term.bot = b;
922 }
923
924 void
925 csihandle(void) {
926 switch(escseq.mode) {
927 default:
928 unknown:
929 printf("erresc: unknown csi ");
930 csidump();
931 /* die(""); */
932 break;
933 case '@': /* ICH -- Insert <n> blank char */
934 DEFAULT(escseq.arg[0], 1);
935 tinsertblank(escseq.arg[0]);
936 break;
937 case 'A': /* CUU -- Cursor <n> Up */
938 case 'e':
939 DEFAULT(escseq.arg[0], 1);
940 tmoveto(term.c.x, term.c.y-escseq.arg[0]);
941 break;
942 case 'B': /* CUD -- Cursor <n> Down */
943 DEFAULT(escseq.arg[0], 1);
944 tmoveto(term.c.x, term.c.y+escseq.arg[0]);
945 break;
946 case 'C': /* CUF -- Cursor <n> Forward */
947 case 'a':
948 DEFAULT(escseq.arg[0], 1);
949 tmoveto(term.c.x+escseq.arg[0], term.c.y);
950 break;
951 case 'D': /* CUB -- Cursor <n> Backward */
952 DEFAULT(escseq.arg[0], 1);
953 tmoveto(term.c.x-escseq.arg[0], term.c.y);
954 break;
955 case 'E': /* CNL -- Cursor <n> Down and first col */
956 DEFAULT(escseq.arg[0], 1);
957 tmoveto(0, term.c.y+escseq.arg[0]);
958 break;
959 case 'F': /* CPL -- Cursor <n> Up and first col */
960 DEFAULT(escseq.arg[0], 1);
961 tmoveto(0, term.c.y-escseq.arg[0]);
962 break;
963 case 'G': /* CHA -- Move to <col> */
964 case '`': /* XXX: HPA -- same? */
965 DEFAULT(escseq.arg[0], 1);
966 tmoveto(escseq.arg[0]-1, term.c.y);
967 break;
968 case 'H': /* CUP -- Move to <row> <col> */
969 case 'f': /* XXX: HVP -- same? */
970 DEFAULT(escseq.arg[0], 1);
971 DEFAULT(escseq.arg[1], 1);
972 tmoveto(escseq.arg[1]-1, escseq.arg[0]-1);
973 break;
974 /* XXX: (CSI n I) CHT -- Cursor Forward Tabulation <n> tab stops */
975 case 'J': /* ED -- Clear screen */
976 switch(escseq.arg[0]) {
977 case 0: /* below */
978 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
979 if(term.c.y < term.row-1)
980 tclearregion(0, term.c.y+1, term.col-1, term.row-1);
981 break;
982 case 1: /* above */
983 if(term.c.y > 1)
984 tclearregion(0, 0, term.col-1, term.c.y-1);
985 tclearregion(0, term.c.y, term.c.x, term.c.y);
986 break;
987 case 2: /* all */
988 tclearregion(0, 0, term.col-1, term.row-1);
989 break;
990 default:
991 goto unknown;
992 }
993 break;
994 case 'K': /* EL -- Clear line */
995 switch(escseq.arg[0]) {
996 case 0: /* right */
997 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
998 break;
999 case 1: /* left */
1000 tclearregion(0, term.c.y, term.c.x, term.c.y);
1001 break;
1002 case 2: /* all */
1003 tclearregion(0, term.c.y, term.col-1, term.c.y);
1004 break;
1005 }
1006 break;
1007 case 'S': /* SU -- Scroll <n> line up */
1008 DEFAULT(escseq.arg[0], 1);
1009 tscrollup(term.top, escseq.arg[0]);
1010 break;
1011 case 'T': /* SD -- Scroll <n> line down */
1012 DEFAULT(escseq.arg[0], 1);
1013 tscrolldown(term.top, escseq.arg[0]);
1014 break;
1015 case 'L': /* IL -- Insert <n> blank lines */
1016 DEFAULT(escseq.arg[0], 1);
1017 tinsertblankline(escseq.arg[0]);
1018 break;
1019 case 'l': /* RM -- Reset Mode */
1020 if(escseq.priv) {
1021 switch(escseq.arg[0]) {
1022 case 1:
1023 term.mode &= ~MODE_APPKEYPAD;
1024 break;
1025 case 5: /* TODO: DECSCNM -- Remove reverse video */
1026 break;
1027 case 7:
1028 term.mode &= ~MODE_WRAP;
1029 break;
1030 case 12: /* att610 -- Stop blinking cursor (IGNORED) */
1031 break;
1032 case 20:
1033 term.mode &= ~MODE_CRLF;
1034 break;
1035 case 25:
1036 term.c.state |= CURSOR_HIDE;
1037 break;
1038 case 1049: /* = 1047 and 1048 */
1039 case 1047:
1040 if(IS_SET(MODE_ALTSCREEN)) {
1041 tclearregion(0, 0, term.col-1, term.row-1);
1042 tswapscreen();
1043 }
1044 if(escseq.arg[0] == 1047)
1045 break;
1046 case 1048:
1047 tcursor(CURSOR_LOAD);
1048 break;
1049 default:
1050 goto unknown;
1051 }
1052 } else {
1053 switch(escseq.arg[0]) {
1054 case 4:
1055 term.mode &= ~MODE_INSERT;
1056 break;
1057 default:
1058 goto unknown;
1059 }
1060 }
1061 break;
1062 case 'M': /* DL -- Delete <n> lines */
1063 DEFAULT(escseq.arg[0], 1);
1064 tdeleteline(escseq.arg[0]);
1065 break;
1066 case 'X': /* ECH -- Erase <n> char */
1067 DEFAULT(escseq.arg[0], 1);
1068 tclearregion(term.c.x, term.c.y, term.c.x + escseq.arg[0], term.c.y);
1069 break;
1070 case 'P': /* DCH -- Delete <n> char */
1071 DEFAULT(escseq.arg[0], 1);
1072 tdeletechar(escseq.arg[0]);
1073 break;
1074 /* XXX: (CSI n Z) CBT -- Cursor Backward Tabulation <n> tab stops */
1075 case 'd': /* VPA -- Move to <row> */
1076 DEFAULT(escseq.arg[0], 1);
1077 tmoveto(term.c.x, escseq.arg[0]-1);
1078 break;
1079 case 'h': /* SM -- Set terminal mode */
1080 if(escseq.priv) {
1081 switch(escseq.arg[0]) {
1082 case 1:
1083 term.mode |= MODE_APPKEYPAD;
1084 break;
1085 case 5: /* DECSCNM -- Reverve video */
1086 /* TODO: set REVERSE on the whole screen (f) */
1087 break;
1088 case 7:
1089 term.mode |= MODE_WRAP;
1090 break;
1091 case 20:
1092 term.mode |= MODE_CRLF;
1093 break;
1094 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1095 /* fallthrough for xterm cvvis = CSI [ ? 12 ; 25 h */
1096 if(escseq.narg > 1 && escseq.arg[1] != 25)
1097 break;
1098 case 25:
1099 term.c.state &= ~CURSOR_HIDE;
1100 break;
1101 case 1049: /* = 1047 and 1048 */
1102 case 1047:
1103 if(IS_SET(MODE_ALTSCREEN))
1104 tclearregion(0, 0, term.col-1, term.row-1);
1105 else
1106 tswapscreen();
1107 if(escseq.arg[0] == 1047)
1108 break;
1109 case 1048:
1110 tcursor(CURSOR_SAVE);
1111 break;
1112 default: goto unknown;
1113 }
1114 } else {
1115 switch(escseq.arg[0]) {
1116 case 4:
1117 term.mode |= MODE_INSERT;
1118 break;
1119 default: goto unknown;
1120 }
1121 };
1122 break;
1123 case 'm': /* SGR -- Terminal attribute (color) */
1124 tsetattr(escseq.arg, escseq.narg);
1125 break;
1126 case 'r': /* DECSTBM -- Set Scrolling Region */
1127 if(escseq.priv)
1128 goto unknown;
1129 else {
1130 DEFAULT(escseq.arg[0], 1);
1131 DEFAULT(escseq.arg[1], term.row);
1132 tsetscroll(escseq.arg[0]-1, escseq.arg[1]-1);
1133 tmoveto(0, 0);
1134 }
1135 break;
1136 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1137 tcursor(CURSOR_SAVE);
1138 break;
1139 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1140 tcursor(CURSOR_LOAD);
1141 break;
1142 }
1143 }
1144
1145 void
1146 csidump(void) {
1147 int i;
1148 printf("ESC [ %s", escseq.priv ? "? " : "");
1149 if(escseq.narg)
1150 for(i = 0; i < escseq.narg; i++)
1151 printf("%d ", escseq.arg[i]);
1152 if(escseq.mode)
1153 putchar(escseq.mode);
1154 putchar('\n');
1155 }
1156
1157 void
1158 csireset(void) {
1159 memset(&escseq, 0, sizeof(escseq));
1160 }
1161
1162 void
1163 tputtab(void) {
1164 int space = TAB - term.c.x % TAB;
1165 tmoveto(term.c.x + space, term.c.y);
1166 }
1167
1168 void
1169 tputc(char *c) {
1170 char ascii = *c;
1171 if(term.esc & ESC_START) {
1172 if(term.esc & ESC_CSI) {
1173 escseq.buf[escseq.len++] = ascii;
1174 if(BETWEEN(ascii, 0x40, 0x7E) || escseq.len >= ESC_BUF_SIZ) {
1175 term.esc = 0;
1176 csiparse(), csihandle();
1177 }
1178 /* TODO: handle other OSC */
1179 } else if(term.esc & ESC_OSC) {
1180 if(ascii == ';') {
1181 term.titlelen = 0;
1182 term.esc = ESC_START | ESC_TITLE;
1183 }
1184 } else if(term.esc & ESC_TITLE) {
1185 if(ascii == '\a' || term.titlelen+1 >= ESC_TITLE_SIZ) {
1186 term.esc = 0;
1187 term.title[term.titlelen] = '\0';
1188 XStoreName(xw.dis, xw.win, term.title);
1189 } else {
1190 term.title[term.titlelen++] = ascii;
1191 }
1192 } else if(term.esc & ESC_ALTCHARSET) {
1193 switch(ascii) {
1194 case '0': /* Line drawing crap */
1195 term.c.attr.mode |= ATTR_GFX;
1196 break;
1197 case 'B': /* Back to regular text */
1198 term.c.attr.mode &= ~ATTR_GFX;
1199 break;
1200 default:
1201 printf("esc unhandled charset: ESC ( %c\n", ascii);
1202 }
1203 term.esc = 0;
1204 } else {
1205 switch(ascii) {
1206 case '[':
1207 term.esc |= ESC_CSI;
1208 break;
1209 case ']':
1210 term.esc |= ESC_OSC;
1211 break;
1212 case '(':
1213 term.esc |= ESC_ALTCHARSET;
1214 break;
1215 case 'D': /* IND -- Linefeed */
1216 if(term.c.y == term.bot)
1217 tscrollup(term.top, 1);
1218 else
1219 tmoveto(term.c.x, term.c.y+1);
1220 term.esc = 0;
1221 break;
1222 case 'E': /* NEL -- Next line */
1223 tnewline(1); /* always go to first col */
1224 term.esc = 0;
1225 break;
1226 case 'M': /* RI -- Reverse index */
1227 if(term.c.y == term.top)
1228 tscrolldown(term.top, 1);
1229 else
1230 tmoveto(term.c.x, term.c.y-1);
1231 term.esc = 0;
1232 break;
1233 case 'c': /* RIS -- Reset to inital state */
1234 treset();
1235 term.esc = 0;
1236 break;
1237 case '=': /* DECPAM -- Application keypad */
1238 term.mode |= MODE_APPKEYPAD;
1239 term.esc = 0;
1240 break;
1241 case '>': /* DECPNM -- Normal keypad */
1242 term.mode &= ~MODE_APPKEYPAD;
1243 term.esc = 0;
1244 break;
1245 case '7': /* DECSC -- Save Cursor */
1246 tcursor(CURSOR_SAVE);
1247 term.esc = 0;
1248 break;
1249 case '8': /* DECRC -- Restore Cursor */
1250 tcursor(CURSOR_LOAD);
1251 term.esc = 0;
1252 break;
1253 default:
1254 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
1255 (unsigned char) ascii, isprint(ascii)?ascii:'.');
1256 term.esc = 0;
1257 }
1258 }
1259 } else {
1260 switch(ascii) {
1261 case '\t':
1262 tputtab();
1263 break;
1264 case '\b':
1265 tmoveto(term.c.x-1, term.c.y);
1266 break;
1267 case '\r':
1268 tmoveto(0, term.c.y);
1269 break;
1270 case '\f':
1271 case '\v':
1272 case '\n':
1273 /* go to first col if the mode is set */
1274 tnewline(IS_SET(MODE_CRLF));
1275 break;
1276 case '\a':
1277 if(!(xw.state & WIN_FOCUSED))
1278 xseturgency(1);
1279 break;
1280 case '\033':
1281 csireset();
1282 term.esc = ESC_START;
1283 break;
1284 default:
1285 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
1286 tnewline(1); /* always go to first col */
1287 tsetchar(c);
1288 if(term.c.x+1 < term.col)
1289 tmoveto(term.c.x+1, term.c.y);
1290 else
1291 term.c.state |= CURSOR_WRAPNEXT;
1292 break;
1293 }
1294 }
1295 }
1296
1297 int
1298 tresize(int col, int row) {
1299 int i, x;
1300 int minrow = MIN(row, term.row);
1301 int mincol = MIN(col, term.col);
1302 int slide = term.c.y - row + 1;
1303
1304 if(col < 1 || row < 1)
1305 return 0;
1306
1307 /* free unneeded rows */
1308 i = 0;
1309 if(slide > 0) {
1310 /* slide screen to keep cursor where we expect it -
1311 * tscrollup would work here, but we can optimize to
1312 * memmove because we're freeing the earlier lines */
1313 for(/* i = 0 */; i < slide; i++) {
1314 free(term.line[i]);
1315 free(term.alt[i]);
1316 }
1317 memmove(term.line, term.line + slide, row * sizeof(Line));
1318 memmove(term.alt, term.alt + slide, row * sizeof(Line));
1319 }
1320 for(i += row; i < term.row; i++) {
1321 free(term.line[i]);
1322 free(term.alt[i]);
1323 }
1324
1325 /* resize to new height */
1326 term.line = realloc(term.line, row * sizeof(Line));
1327 term.alt = realloc(term.alt, row * sizeof(Line));
1328
1329 /* resize each row to new width, zero-pad if needed */
1330 for(i = 0; i < minrow; i++) {
1331 term.line[i] = realloc(term.line[i], col * sizeof(Glyph));
1332 term.alt[i] = realloc(term.alt[i], col * sizeof(Glyph));
1333 for(x = mincol; x < col; x++) {
1334 term.line[i][x].state = 0;
1335 term.alt[i][x].state = 0;
1336 }
1337 }
1338
1339 /* allocate any new rows */
1340 for(/* i == minrow */; i < row; i++) {
1341 term.line[i] = calloc(col, sizeof(Glyph));
1342 term.alt [i] = calloc(col, sizeof(Glyph));
1343 }
1344
1345 /* update terminal size */
1346 term.col = col, term.row = row;
1347 /* make use of the LIMIT in tmoveto */
1348 tmoveto(term.c.x, term.c.y);
1349 /* reset scrolling region */
1350 tsetscroll(0, row-1);
1351 return (slide > 0);
1352 }
1353
1354 void
1355 xresize(int col, int row) {
1356 Pixmap newbuf;
1357 int oldw, oldh;
1358
1359 oldw = xw.bufw;
1360 oldh = xw.bufh;
1361 xw.bufw = MAX(1, col * xw.cw);
1362 xw.bufh = MAX(1, row * xw.ch);
1363 newbuf = XCreatePixmap(xw.dis, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dis, xw.scr));
1364 XCopyArea(xw.dis, xw.buf, newbuf, dc.gc, 0, 0, xw.bufw, xw.bufh, 0, 0);
1365 XFreePixmap(xw.dis, xw.buf);
1366 XSetForeground(xw.dis, dc.gc, dc.col[DefaultBG]);
1367 if(xw.bufw > oldw)
1368 XFillRectangle(xw.dis, newbuf, dc.gc, oldw, 0,
1369 xw.bufw-oldw, MIN(xw.bufh, oldh));
1370 else if(xw.bufw < oldw && (BORDER > 0 || xw.w > xw.bufw))
1371 XClearArea(xw.dis, xw.win, BORDER+xw.bufw, BORDER,
1372 xw.w-xw.bufh-BORDER, BORDER+MIN(xw.bufh, oldh),
1373 False);
1374 if(xw.bufh > oldh)
1375 XFillRectangle(xw.dis, newbuf, dc.gc, 0, oldh,
1376 xw.bufw, xw.bufh-oldh);
1377 else if(xw.bufh < oldh && (BORDER > 0 || xw.h > xw.bufh))
1378 XClearArea(xw.dis, xw.win, BORDER, BORDER+xw.bufh,
1379 xw.w-2*BORDER, xw.h-xw.bufh-BORDER,
1380 False);
1381 xw.buf = newbuf;
1382 }
1383
1384 void
1385 xloadcols(void) {
1386 int i, r, g, b;
1387 XColor color;
1388 unsigned long white = WhitePixel(xw.dis, xw.scr);
1389
1390 for(i = 0; i < 16; i++) {
1391 if (!XAllocNamedColor(xw.dis, xw.cmap, colorname[i], &color, &color)) {
1392 dc.col[i] = white;
1393 fprintf(stderr, "Could not allocate color '%s'\n", colorname[i]);
1394 } else
1395 dc.col[i] = color.pixel;
1396 }
1397
1398 /* same colors as xterm */
1399 for(r = 0; r < 6; r++)
1400 for(g = 0; g < 6; g++)
1401 for(b = 0; b < 6; b++) {
1402 color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
1403 color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
1404 color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
1405 if (!XAllocColor(xw.dis, xw.cmap, &color)) {
1406 dc.col[i] = white;
1407 fprintf(stderr, "Could not allocate color %d\n", i);
1408 } else
1409 dc.col[i] = color.pixel;
1410 i++;
1411 }
1412
1413 for(r = 0; r < 24; r++, i++) {
1414 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
1415 if (!XAllocColor(xw.dis, xw.cmap, &color)) {
1416 dc.col[i] = white;
1417 fprintf(stderr, "Could not allocate color %d\n", i);
1418 } else
1419 dc.col[i] = color.pixel;
1420 }
1421 }
1422
1423 void
1424 xclear(int x1, int y1, int x2, int y2) {
1425 XSetForeground(xw.dis, dc.gc, dc.col[DefaultBG]);
1426 XFillRectangle(xw.dis, xw.buf, dc.gc,
1427 x1 * xw.cw, y1 * xw.ch,
1428 (x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch);
1429 }
1430
1431 void
1432 xhints(void)
1433 {
1434 XClassHint class = {opt_class ? opt_class : TNAME, TNAME};
1435 XWMHints wm = {.flags = InputHint, .input = 1};
1436 XSizeHints size = {
1437 .flags = PSize | PResizeInc | PBaseSize,
1438 .height = xw.h,
1439 .width = xw.w,
1440 .height_inc = xw.ch,
1441 .width_inc = xw.cw,
1442 .base_height = 2*BORDER,
1443 .base_width = 2*BORDER,
1444 };
1445 XSetWMProperties(xw.dis, xw.win, NULL, NULL, NULL, 0, &size, &wm, &class);
1446 }
1447
1448 XFontSet
1449 xinitfont(char *fontstr)
1450 {
1451 XFontSet set;
1452 char *def, **missing;
1453 int n;
1454
1455 missing = NULL;
1456 set = XCreateFontSet(xw.dis, fontstr, &missing, &n, &def);
1457 if(missing) {
1458 while(n--)
1459 fprintf(stderr, "st: missing fontset: %s\n", missing[n]);
1460 XFreeStringList(missing);
1461 }
1462 return set;
1463 }
1464
1465 void
1466 xgetfontinfo(XFontSet set, int *ascent, int *descent, short *lbearing, short *rbearing)
1467 {
1468 XFontStruct **xfonts;
1469 char **font_names;
1470 int i, n;
1471
1472 *ascent = *descent = *lbearing = *rbearing = 0;
1473 n = XFontsOfFontSet(set, &xfonts, &font_names);
1474 for(i = 0; i < n; i++) {
1475 *ascent = MAX(*ascent, (*xfonts)->ascent);
1476 *descent = MAX(*descent, (*xfonts)->descent);
1477 *lbearing = MAX(*lbearing, (*xfonts)->min_bounds.lbearing);
1478 *rbearing = MAX(*rbearing, (*xfonts)->max_bounds.rbearing);
1479 xfonts++;
1480 }
1481 }
1482
1483 void
1484 initfonts(char *fontstr, char *bfontstr)
1485 {
1486 if((dc.font.set = xinitfont(fontstr)) == NULL ||
1487 (dc.bfont.set = xinitfont(bfontstr)) == NULL)
1488 die("Can't load font %s\n", dc.font.set ? BOLDFONT : FONT);
1489 xgetfontinfo(dc.font.set, &dc.font.ascent, &dc.font.descent,
1490 &dc.font.lbearing, &dc.font.rbearing);
1491 xgetfontinfo(dc.bfont.set, &dc.bfont.ascent, &dc.bfont.descent,
1492 &dc.bfont.lbearing, &dc.bfont.rbearing);
1493 }
1494
1495 void
1496 xinit(void) {
1497 XSetWindowAttributes attrs;
1498
1499 if(!(xw.dis = XOpenDisplay(NULL)))
1500 die("Can't open display\n");
1501 xw.scr = XDefaultScreen(xw.dis);
1502
1503 /* font */
1504 initfonts(FONT, BOLDFONT);
1505
1506 /* XXX: Assuming same size for bold font */
1507 xw.cw = dc.font.rbearing - dc.font.lbearing;
1508 xw.ch = dc.font.ascent + dc.font.descent;
1509
1510 /* colors */
1511 xw.cmap = XDefaultColormap(xw.dis, xw.scr);
1512 xloadcols();
1513
1514 /* window - default size */
1515 xw.bufh = 24 * xw.ch;
1516 xw.bufw = 80 * xw.cw;
1517 xw.h = xw.bufh + 2*BORDER;
1518 xw.w = xw.bufw + 2*BORDER;
1519
1520 attrs.background_pixel = dc.col[DefaultBG];
1521 attrs.border_pixel = dc.col[DefaultBG];
1522 attrs.bit_gravity = NorthWestGravity;
1523 attrs.event_mask = FocusChangeMask | KeyPressMask
1524 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
1525 | PointerMotionMask | ButtonPressMask | ButtonReleaseMask;
1526 attrs.colormap = xw.cmap;
1527
1528 xw.win = XCreateWindow(xw.dis, XRootWindow(xw.dis, xw.scr), 0, 0,
1529 xw.w, xw.h, 0, XDefaultDepth(xw.dis, xw.scr), InputOutput,
1530 XDefaultVisual(xw.dis, xw.scr),
1531 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
1532 | CWColormap,
1533 &attrs);
1534 xw.buf = XCreatePixmap(xw.dis, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dis, xw.scr));
1535
1536
1537 /* input methods */
1538 xw.xim = XOpenIM(xw.dis, NULL, NULL, NULL);
1539 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
1540 | XIMStatusNothing, XNClientWindow, xw.win,
1541 XNFocusWindow, xw.win, NULL);
1542 /* gc */
1543 dc.gc = XCreateGC(xw.dis, xw.win, 0, NULL);
1544
1545 XMapWindow(xw.dis, xw.win);
1546 xhints();
1547 XStoreName(xw.dis, xw.win, opt_title ? opt_title : "st");
1548 XSync(xw.dis, 0);
1549 }
1550
1551 void
1552 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
1553 unsigned long xfg, xbg;
1554 int winx = x*xw.cw, winy = y*xw.ch + dc.font.ascent, width = charlen*xw.cw;
1555 int i;
1556
1557 if(base.mode & ATTR_REVERSE)
1558 xfg = dc.col[base.bg], xbg = dc.col[base.fg];
1559 else
1560 xfg = dc.col[base.fg], xbg = dc.col[base.bg];
1561
1562 XSetBackground(xw.dis, dc.gc, xbg);
1563 XSetForeground(xw.dis, dc.gc, xfg);
1564
1565 if(base.mode & ATTR_GFX)
1566 for(i = 0; i < bytelen; i++) {
1567 char c = gfx[(unsigned int)s[i] % 256];
1568 if(c)
1569 s[i] = c;
1570 else if(s[i] > 0x5f)
1571 s[i] -= 0x5f;
1572 }
1573
1574 XmbDrawImageString(xw.dis, xw.buf, base.mode & ATTR_BOLD ? dc.bfont.set : dc.font.set,
1575 dc.gc, winx, winy, s, bytelen);
1576
1577 if(base.mode & ATTR_UNDERLINE)
1578 XDrawLine(xw.dis, xw.buf, dc.gc, winx, winy+1, winx+width-1, winy+1);
1579 }
1580
1581 void
1582 xdrawcursor(void) {
1583 static int oldx = 0;
1584 static int oldy = 0;
1585 int sl;
1586 Glyph g = {{' '}, ATTR_NULL, DefaultBG, DefaultCS, 0};
1587
1588 LIMIT(oldx, 0, term.col-1);
1589 LIMIT(oldy, 0, term.row-1);
1590
1591 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
1592 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
1593
1594 /* remove the old cursor */
1595 if(term.line[oldy][oldx].state & GLYPH_SET) {
1596 sl = utf8size(term.line[oldy][oldx].c);
1597 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx, oldy, 1, sl);
1598 } else
1599 xclear(oldx, oldy, oldx, oldy);
1600
1601 /* draw the new one */
1602 if(!(term.c.state & CURSOR_HIDE) && (xw.state & WIN_FOCUSED)) {
1603 sl = utf8size(g.c);
1604 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
1605 oldx = term.c.x, oldy = term.c.y;
1606 }
1607 }
1608
1609 #ifdef DEBUG
1610 /* basic drawing routines */
1611 void
1612 xdrawc(int x, int y, Glyph g) {
1613 int sl = utf8size(g.c);
1614 XRectangle r = { x * xw.cw, y * xw.ch, xw.cw, xw.ch };
1615 XSetBackground(xw.dis, dc.gc, dc.col[g.bg]);
1616 XSetForeground(xw.dis, dc.gc, dc.col[g.fg]);
1617 XmbDrawImageString(xw.dis, xw.buf, g.mode&ATTR_BOLD?dc.bfont.fs:dc.font.fs,
1618 dc.gc, r.x, r.y+dc.font.ascent, g.c, sl);
1619 }
1620
1621 void
1622 draw(int dummy) {
1623 int x, y;
1624
1625 xclear(0, 0, term.col-1, term.row-1);
1626 for(y = 0; y < term.row; y++)
1627 for(x = 0; x < term.col; x++)
1628 if(term.line[y][x].state & GLYPH_SET)
1629 xdrawc(x, y, term.line[y][x]);
1630
1631 xdrawcursor();
1632 XCopyArea(xw.dis, xw.buf, xw.win, dc.gc, 0, 0, xw.bufw, xw.bufh, BORDER, BORDER);
1633 XFlush(xw.dis);
1634 }
1635
1636 #else
1637 /* optimized drawing routine */
1638 void
1639 draw(int redraw_all) {
1640 int ic, ib, x, y, ox, sl;
1641 Glyph base, new;
1642 char buf[DRAW_BUF_SIZ];
1643
1644 if(!(xw.state & WIN_VISIBLE))
1645 return;
1646
1647 xclear(0, 0, term.col-1, term.row-1);
1648 for(y = 0; y < term.row; y++) {
1649 base = term.line[y][0];
1650 ic = ib = ox = 0;
1651 for(x = 0; x < term.col; x++) {
1652 new = term.line[y][x];
1653 if(sel.bx!=-1 && *(new.c) && selected(x, y))
1654 new.mode ^= ATTR_REVERSE;
1655 if(ib > 0 && (!(new.state & GLYPH_SET) || ATTRCMP(base, new) ||
1656 ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
1657 xdraws(buf, base, ox, y, ic, ib);
1658 ic = ib = 0;
1659 }
1660 if(new.state & GLYPH_SET) {
1661 if(ib == 0) {
1662 ox = x;
1663 base = new;
1664 }
1665 sl = utf8size(new.c);
1666 memcpy(buf+ib, new.c, sl);
1667 ib += sl;
1668 ++ic;
1669 }
1670 }
1671 if(ib > 0)
1672 xdraws(buf, base, ox, y, ic, ib);
1673 }
1674 xdrawcursor();
1675 XCopyArea(xw.dis, xw.buf, xw.win, dc.gc, 0, 0, xw.bufw, xw.bufh, BORDER, BORDER);
1676 }
1677
1678 #endif
1679
1680 void
1681 expose(XEvent *ev) {
1682 XExposeEvent *e = &ev->xexpose;
1683 if(xw.state & WIN_REDRAW) {
1684 if(!e->count) {
1685 xw.state &= ~WIN_REDRAW;
1686 draw(SCREEN_REDRAW);
1687 }
1688 } else
1689 XCopyArea(xw.dis, xw.buf, xw.win, dc.gc, e->x-BORDER, e->y-BORDER,
1690 e->width, e->height, e->x, e->y);
1691 }
1692
1693 void
1694 visibility(XEvent *ev) {
1695 XVisibilityEvent *e = &ev->xvisibility;
1696 if(e->state == VisibilityFullyObscured)
1697 xw.state &= ~WIN_VISIBLE;
1698 else if(!(xw.state & WIN_VISIBLE))
1699 /* need a full redraw for next Expose, not just a buf copy */
1700 xw.state |= WIN_VISIBLE | WIN_REDRAW;
1701 }
1702
1703 void
1704 unmap(XEvent *ev) {
1705 xw.state &= ~WIN_VISIBLE;
1706 }
1707
1708 void
1709 xseturgency(int add) {
1710 XWMHints *h = XGetWMHints(xw.dis, xw.win);
1711 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
1712 XSetWMHints(xw.dis, xw.win, h);
1713 XFree(h);
1714 }
1715
1716 void
1717 focus(XEvent *ev) {
1718 if(ev->type == FocusIn) {
1719 xw.state |= WIN_FOCUSED;
1720 xseturgency(0);
1721 } else
1722 xw.state &= ~WIN_FOCUSED;
1723 draw(SCREEN_UPDATE);
1724 }
1725
1726 char*
1727 kmap(KeySym k) {
1728 int i;
1729 for(i = 0; i < LEN(key); i++)
1730 if(key[i].k == k)
1731 return (char*)key[i].s;
1732 return NULL;
1733 }
1734
1735 void
1736 kpress(XEvent *ev) {
1737 XKeyEvent *e = &ev->xkey;
1738 KeySym ksym;
1739 char buf[32];
1740 char *customkey;
1741 int len;
1742 int meta;
1743 int shift;
1744 Status status;
1745
1746 meta = e->state & Mod1Mask;
1747 shift = e->state & ShiftMask;
1748 len = XmbLookupString(xw.xic, e, buf, sizeof(buf), &ksym, &status);
1749
1750 /* 1. custom keys from config.h */
1751 if((customkey = kmap(ksym)))
1752 ttywrite(customkey, strlen(customkey));
1753 /* 2. hardcoded (overrides X lookup) */
1754 else
1755 switch(ksym) {
1756 case XK_Up:
1757 case XK_Down:
1758 case XK_Left:
1759 case XK_Right:
1760 sprintf(buf, "\033%c%c", IS_SET(MODE_APPKEYPAD) ? 'O' : '[', "DACB"[ksym - XK_Left]);
1761 ttywrite(buf, 3);
1762 break;
1763 case XK_Insert:
1764 if(shift)
1765 selpaste();
1766 break;
1767 case XK_Return:
1768 if(IS_SET(MODE_CRLF))
1769 ttywrite("\r\n", 2);
1770 else
1771 ttywrite("\r", 1);
1772 break;
1773 /* 3. X lookup */
1774 default:
1775 if(len > 0) {
1776 buf[sizeof(buf)-1] = '\0';
1777 if(meta && len == 1)
1778 ttywrite("\033", 1);
1779 ttywrite(buf, len);
1780 } else /* 4. nothing to send */
1781 fprintf(stderr, "errkey: %d\n", (int)ksym);
1782 break;
1783 }
1784 }
1785
1786 void
1787 resize(XEvent *e) {
1788 int col, row;
1789
1790 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
1791 return;
1792
1793 xw.w = e->xconfigure.width;
1794 xw.h = e->xconfigure.height;
1795 col = (xw.w - 2*BORDER) / xw.cw;
1796 row = (xw.h - 2*BORDER) / xw.ch;
1797 if(col == term.col && row == term.row)
1798 return;
1799 if(tresize(col, row))
1800 draw(SCREEN_REDRAW);
1801 ttyresize(col, row);
1802 xresize(col, row);
1803 }
1804
1805 void
1806 run(void) {
1807 XEvent ev;
1808 fd_set rfd;
1809 int xfd = XConnectionNumber(xw.dis);
1810
1811 for(;;) {
1812 FD_ZERO(&rfd);
1813 FD_SET(cmdfd, &rfd);
1814 FD_SET(xfd, &rfd);
1815 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, NULL) < 0) {
1816 if(errno == EINTR)
1817 continue;
1818 die("select failed: %s\n", SERRNO);
1819 }
1820 if(FD_ISSET(cmdfd, &rfd)) {
1821 ttyread();
1822 draw(SCREEN_UPDATE);
1823 }
1824 while(XPending(xw.dis)) {
1825 XNextEvent(xw.dis, &ev);
1826 if (XFilterEvent(&ev, xw.win))
1827 continue;
1828 if(handler[ev.type])
1829 (handler[ev.type])(&ev);
1830 }
1831 }
1832 }
1833
1834 int
1835 main(int argc, char *argv[]) {
1836 int i;
1837
1838 for(i = 1; i < argc; i++) {
1839 switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
1840 case 't':
1841 if(++i < argc) opt_title = argv[i];
1842 break;
1843 case 'c':
1844 if(++i < argc) opt_class = argv[i];
1845 break;
1846 case 'e':
1847 if(++i < argc) opt_cmd = argv[i];
1848 break;
1849 case 'v':
1850 default:
1851 die(USAGE);
1852 }
1853 }
1854 setlocale(LC_CTYPE, "");
1855 tnew(80, 24);
1856 ttynew();
1857 xinit();
1858 selinit();
1859 run();
1860 return 0;
1861 }