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use memmove() instead of memcpy() in ttyread().
[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__) || defined(__APPLE__)
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* dpy;
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 x, y, sz, sl, ls = 0;
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.dpy, 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.dpy, 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.dpy, "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.dpy, XA_PRIMARY, xw.win, CurrentTime);
502
503 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
504 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
505
506 XFlush(xw.dpy);
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 static char buf[BUFSIZ];
610 static int buflen = 0;
611 char *ptr;
612 char s[UTF_SIZ];
613 int charsize; /* size of utf8 char in bytes */
614 long utf8c;
615 int ret;
616
617 /* append read bytes to unprocessed bytes */
618 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
619 die("Couldn't read from shell: %s\n", SERRNO);
620
621 /* process every complete utf8 char */
622 buflen += ret;
623 ptr = buf;
624 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
625 charsize = utf8decode(ptr, &utf8c);
626 utf8encode(&utf8c, s);
627 tputc(s);
628 ptr += charsize;
629 buflen -= charsize;
630 }
631
632 /* keep any uncomplete utf8 char for the next call */
633 memmove(buf, ptr, buflen);
634 }
635
636 void
637 ttywrite(const char *s, size_t n) {
638 if(write(cmdfd, s, n) == -1)
639 die("write error on tty: %s\n", SERRNO);
640 }
641
642 void
643 ttyresize(int x, int y) {
644 struct winsize w;
645
646 w.ws_row = term.row;
647 w.ws_col = term.col;
648 w.ws_xpixel = w.ws_ypixel = 0;
649 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
650 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
651 }
652
653 void
654 tcursor(int mode) {
655 static TCursor c;
656
657 if(mode == CURSOR_SAVE)
658 c = term.c;
659 else if(mode == CURSOR_LOAD)
660 term.c = c, tmoveto(c.x, c.y);
661 }
662
663 void
664 treset(void) {
665 term.c = (TCursor){{
666 .mode = ATTR_NULL,
667 .fg = DefaultFG,
668 .bg = DefaultBG
669 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
670
671 term.top = 0, term.bot = term.row - 1;
672 term.mode = MODE_WRAP;
673 tclearregion(0, 0, term.col-1, term.row-1);
674 }
675
676 void
677 tnew(int col, int row) {
678 /* set screen size */
679 term.row = row, term.col = col;
680 term.line = malloc(term.row * sizeof(Line));
681 term.alt = malloc(term.row * sizeof(Line));
682 for(row = 0 ; row < term.row; row++) {
683 term.line[row] = malloc(term.col * sizeof(Glyph));
684 term.alt [row] = malloc(term.col * sizeof(Glyph));
685 }
686 /* setup screen */
687 treset();
688 }
689
690 void
691 tswapscreen(void) {
692 Line* tmp = term.line;
693 term.line = term.alt;
694 term.alt = tmp;
695 term.mode ^= MODE_ALTSCREEN;
696 }
697
698 void
699 tscrolldown(int orig, int n) {
700 int i;
701 Line temp;
702
703 LIMIT(n, 0, term.bot-orig+1);
704
705 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
706
707 for(i = term.bot; i >= orig+n; i--) {
708 temp = term.line[i];
709 term.line[i] = term.line[i-n];
710 term.line[i-n] = temp;
711 }
712 }
713
714 void
715 tscrollup(int orig, int n) {
716 int i;
717 Line temp;
718 LIMIT(n, 0, term.bot-orig+1);
719
720 tclearregion(0, orig, term.col-1, orig+n-1);
721
722 for(i = orig; i <= term.bot-n; i++) {
723 temp = term.line[i];
724 term.line[i] = term.line[i+n];
725 term.line[i+n] = temp;
726 }
727 }
728
729 void
730 tnewline(int first_col) {
731 int y = term.c.y;
732 if(y == term.bot)
733 tscrollup(term.top, 1);
734 else
735 y++;
736 tmoveto(first_col ? 0 : term.c.x, y);
737 }
738
739 void
740 csiparse(void) {
741 /* int noarg = 1; */
742 char *p = escseq.buf;
743
744 escseq.narg = 0;
745 if(*p == '?')
746 escseq.priv = 1, p++;
747
748 while(p < escseq.buf+escseq.len) {
749 while(isdigit(*p)) {
750 escseq.arg[escseq.narg] *= 10;
751 escseq.arg[escseq.narg] += *p++ - '0'/*, noarg = 0 */;
752 }
753 if(*p == ';' && escseq.narg+1 < ESC_ARG_SIZ)
754 escseq.narg++, p++;
755 else {
756 escseq.mode = *p;
757 escseq.narg++;
758 return;
759 }
760 }
761 }
762
763 void
764 tmoveto(int x, int y) {
765 LIMIT(x, 0, term.col-1);
766 LIMIT(y, 0, term.row-1);
767 term.c.state &= ~CURSOR_WRAPNEXT;
768 term.c.x = x;
769 term.c.y = y;
770 }
771
772 void
773 tsetchar(char *c) {
774 term.line[term.c.y][term.c.x] = term.c.attr;
775 memcpy(term.line[term.c.y][term.c.x].c, c, UTF_SIZ);
776 term.line[term.c.y][term.c.x].state |= GLYPH_SET;
777 }
778
779 void
780 tclearregion(int x1, int y1, int x2, int y2) {
781 int x, y, temp;
782
783 if(x1 > x2)
784 temp = x1, x1 = x2, x2 = temp;
785 if(y1 > y2)
786 temp = y1, y1 = y2, y2 = temp;
787
788 LIMIT(x1, 0, term.col-1);
789 LIMIT(x2, 0, term.col-1);
790 LIMIT(y1, 0, term.row-1);
791 LIMIT(y2, 0, term.row-1);
792
793 for(y = y1; y <= y2; y++)
794 for(x = x1; x <= x2; x++)
795 term.line[y][x].state = 0;
796 }
797
798 void
799 tdeletechar(int n) {
800 int src = term.c.x + n;
801 int dst = term.c.x;
802 int size = term.col - src;
803
804 if(src >= term.col) {
805 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
806 return;
807 }
808 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
809 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
810 }
811
812 void
813 tinsertblank(int n) {
814 int src = term.c.x;
815 int dst = src + n;
816 int size = term.col - dst;
817
818 if(dst >= term.col) {
819 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
820 return;
821 }
822 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
823 tclearregion(src, term.c.y, dst - 1, term.c.y);
824 }
825
826 void
827 tinsertblankline(int n) {
828 if(term.c.y < term.top || term.c.y > term.bot)
829 return;
830
831 tscrolldown(term.c.y, n);
832 }
833
834 void
835 tdeleteline(int n) {
836 if(term.c.y < term.top || term.c.y > term.bot)
837 return;
838
839 tscrollup(term.c.y, n);
840 }
841
842 void
843 tsetattr(int *attr, int l) {
844 int i;
845
846 for(i = 0; i < l; i++) {
847 switch(attr[i]) {
848 case 0:
849 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD);
850 term.c.attr.fg = DefaultFG;
851 term.c.attr.bg = DefaultBG;
852 break;
853 case 1:
854 term.c.attr.mode |= ATTR_BOLD;
855 break;
856 case 4:
857 term.c.attr.mode |= ATTR_UNDERLINE;
858 break;
859 case 7:
860 term.c.attr.mode |= ATTR_REVERSE;
861 break;
862 case 22:
863 term.c.attr.mode &= ~ATTR_BOLD;
864 break;
865 case 24:
866 term.c.attr.mode &= ~ATTR_UNDERLINE;
867 break;
868 case 27:
869 term.c.attr.mode &= ~ATTR_REVERSE;
870 break;
871 case 38:
872 if (i + 2 < l && attr[i + 1] == 5) {
873 i += 2;
874 if (BETWEEN(attr[i], 0, 255))
875 term.c.attr.fg = attr[i];
876 else
877 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[i]);
878 }
879 else
880 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
881 break;
882 case 39:
883 term.c.attr.fg = DefaultFG;
884 break;
885 case 48:
886 if (i + 2 < l && attr[i + 1] == 5) {
887 i += 2;
888 if (BETWEEN(attr[i], 0, 255))
889 term.c.attr.bg = attr[i];
890 else
891 fprintf(stderr, "erresc: bad bgcolor %d\n", attr[i]);
892 }
893 else
894 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
895 break;
896 case 49:
897 term.c.attr.bg = DefaultBG;
898 break;
899 default:
900 if(BETWEEN(attr[i], 30, 37))
901 term.c.attr.fg = attr[i] - 30;
902 else if(BETWEEN(attr[i], 40, 47))
903 term.c.attr.bg = attr[i] - 40;
904 else if(BETWEEN(attr[i], 90, 97))
905 term.c.attr.fg = attr[i] - 90 + 8;
906 else if(BETWEEN(attr[i], 100, 107))
907 term.c.attr.fg = attr[i] - 100 + 8;
908 else
909 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]), csidump();
910
911 break;
912 }
913 }
914 }
915
916 void
917 tsetscroll(int t, int b) {
918 int temp;
919
920 LIMIT(t, 0, term.row-1);
921 LIMIT(b, 0, term.row-1);
922 if(t > b) {
923 temp = t;
924 t = b;
925 b = temp;
926 }
927 term.top = t;
928 term.bot = b;
929 }
930
931 void
932 csihandle(void) {
933 switch(escseq.mode) {
934 default:
935 unknown:
936 printf("erresc: unknown csi ");
937 csidump();
938 /* die(""); */
939 break;
940 case '@': /* ICH -- Insert <n> blank char */
941 DEFAULT(escseq.arg[0], 1);
942 tinsertblank(escseq.arg[0]);
943 break;
944 case 'A': /* CUU -- Cursor <n> Up */
945 case 'e':
946 DEFAULT(escseq.arg[0], 1);
947 tmoveto(term.c.x, term.c.y-escseq.arg[0]);
948 break;
949 case 'B': /* CUD -- Cursor <n> Down */
950 DEFAULT(escseq.arg[0], 1);
951 tmoveto(term.c.x, term.c.y+escseq.arg[0]);
952 break;
953 case 'C': /* CUF -- Cursor <n> Forward */
954 case 'a':
955 DEFAULT(escseq.arg[0], 1);
956 tmoveto(term.c.x+escseq.arg[0], term.c.y);
957 break;
958 case 'D': /* CUB -- Cursor <n> Backward */
959 DEFAULT(escseq.arg[0], 1);
960 tmoveto(term.c.x-escseq.arg[0], term.c.y);
961 break;
962 case 'E': /* CNL -- Cursor <n> Down and first col */
963 DEFAULT(escseq.arg[0], 1);
964 tmoveto(0, term.c.y+escseq.arg[0]);
965 break;
966 case 'F': /* CPL -- Cursor <n> Up and first col */
967 DEFAULT(escseq.arg[0], 1);
968 tmoveto(0, term.c.y-escseq.arg[0]);
969 break;
970 case 'G': /* CHA -- Move to <col> */
971 case '`': /* XXX: HPA -- same? */
972 DEFAULT(escseq.arg[0], 1);
973 tmoveto(escseq.arg[0]-1, term.c.y);
974 break;
975 case 'H': /* CUP -- Move to <row> <col> */
976 case 'f': /* XXX: HVP -- same? */
977 DEFAULT(escseq.arg[0], 1);
978 DEFAULT(escseq.arg[1], 1);
979 tmoveto(escseq.arg[1]-1, escseq.arg[0]-1);
980 break;
981 /* XXX: (CSI n I) CHT -- Cursor Forward Tabulation <n> tab stops */
982 case 'J': /* ED -- Clear screen */
983 switch(escseq.arg[0]) {
984 case 0: /* below */
985 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
986 if(term.c.y < term.row-1)
987 tclearregion(0, term.c.y+1, term.col-1, term.row-1);
988 break;
989 case 1: /* above */
990 if(term.c.y > 1)
991 tclearregion(0, 0, term.col-1, term.c.y-1);
992 tclearregion(0, term.c.y, term.c.x, term.c.y);
993 break;
994 case 2: /* all */
995 tclearregion(0, 0, term.col-1, term.row-1);
996 break;
997 default:
998 goto unknown;
999 }
1000 break;
1001 case 'K': /* EL -- Clear line */
1002 switch(escseq.arg[0]) {
1003 case 0: /* right */
1004 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1005 break;
1006 case 1: /* left */
1007 tclearregion(0, term.c.y, term.c.x, term.c.y);
1008 break;
1009 case 2: /* all */
1010 tclearregion(0, term.c.y, term.col-1, term.c.y);
1011 break;
1012 }
1013 break;
1014 case 'S': /* SU -- Scroll <n> line up */
1015 DEFAULT(escseq.arg[0], 1);
1016 tscrollup(term.top, escseq.arg[0]);
1017 break;
1018 case 'T': /* SD -- Scroll <n> line down */
1019 DEFAULT(escseq.arg[0], 1);
1020 tscrolldown(term.top, escseq.arg[0]);
1021 break;
1022 case 'L': /* IL -- Insert <n> blank lines */
1023 DEFAULT(escseq.arg[0], 1);
1024 tinsertblankline(escseq.arg[0]);
1025 break;
1026 case 'l': /* RM -- Reset Mode */
1027 if(escseq.priv) {
1028 switch(escseq.arg[0]) {
1029 case 1:
1030 term.mode &= ~MODE_APPKEYPAD;
1031 break;
1032 case 5: /* TODO: DECSCNM -- Remove reverse video */
1033 break;
1034 case 7:
1035 term.mode &= ~MODE_WRAP;
1036 break;
1037 case 12: /* att610 -- Stop blinking cursor (IGNORED) */
1038 break;
1039 case 20:
1040 term.mode &= ~MODE_CRLF;
1041 break;
1042 case 25:
1043 term.c.state |= CURSOR_HIDE;
1044 break;
1045 case 1049: /* = 1047 and 1048 */
1046 case 1047:
1047 if(IS_SET(MODE_ALTSCREEN)) {
1048 tclearregion(0, 0, term.col-1, term.row-1);
1049 tswapscreen();
1050 }
1051 if(escseq.arg[0] == 1047)
1052 break;
1053 case 1048:
1054 tcursor(CURSOR_LOAD);
1055 break;
1056 default:
1057 goto unknown;
1058 }
1059 } else {
1060 switch(escseq.arg[0]) {
1061 case 4:
1062 term.mode &= ~MODE_INSERT;
1063 break;
1064 default:
1065 goto unknown;
1066 }
1067 }
1068 break;
1069 case 'M': /* DL -- Delete <n> lines */
1070 DEFAULT(escseq.arg[0], 1);
1071 tdeleteline(escseq.arg[0]);
1072 break;
1073 case 'X': /* ECH -- Erase <n> char */
1074 DEFAULT(escseq.arg[0], 1);
1075 tclearregion(term.c.x, term.c.y, term.c.x + escseq.arg[0], term.c.y);
1076 break;
1077 case 'P': /* DCH -- Delete <n> char */
1078 DEFAULT(escseq.arg[0], 1);
1079 tdeletechar(escseq.arg[0]);
1080 break;
1081 /* XXX: (CSI n Z) CBT -- Cursor Backward Tabulation <n> tab stops */
1082 case 'd': /* VPA -- Move to <row> */
1083 DEFAULT(escseq.arg[0], 1);
1084 tmoveto(term.c.x, escseq.arg[0]-1);
1085 break;
1086 case 'h': /* SM -- Set terminal mode */
1087 if(escseq.priv) {
1088 switch(escseq.arg[0]) {
1089 case 1:
1090 term.mode |= MODE_APPKEYPAD;
1091 break;
1092 case 5: /* DECSCNM -- Reverve video */
1093 /* TODO: set REVERSE on the whole screen (f) */
1094 break;
1095 case 7:
1096 term.mode |= MODE_WRAP;
1097 break;
1098 case 20:
1099 term.mode |= MODE_CRLF;
1100 break;
1101 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1102 /* fallthrough for xterm cvvis = CSI [ ? 12 ; 25 h */
1103 if(escseq.narg > 1 && escseq.arg[1] != 25)
1104 break;
1105 case 25:
1106 term.c.state &= ~CURSOR_HIDE;
1107 break;
1108 case 1049: /* = 1047 and 1048 */
1109 case 1047:
1110 if(IS_SET(MODE_ALTSCREEN))
1111 tclearregion(0, 0, term.col-1, term.row-1);
1112 else
1113 tswapscreen();
1114 if(escseq.arg[0] == 1047)
1115 break;
1116 case 1048:
1117 tcursor(CURSOR_SAVE);
1118 break;
1119 default: goto unknown;
1120 }
1121 } else {
1122 switch(escseq.arg[0]) {
1123 case 4:
1124 term.mode |= MODE_INSERT;
1125 break;
1126 default: goto unknown;
1127 }
1128 };
1129 break;
1130 case 'm': /* SGR -- Terminal attribute (color) */
1131 tsetattr(escseq.arg, escseq.narg);
1132 break;
1133 case 'r': /* DECSTBM -- Set Scrolling Region */
1134 if(escseq.priv)
1135 goto unknown;
1136 else {
1137 DEFAULT(escseq.arg[0], 1);
1138 DEFAULT(escseq.arg[1], term.row);
1139 tsetscroll(escseq.arg[0]-1, escseq.arg[1]-1);
1140 tmoveto(0, 0);
1141 }
1142 break;
1143 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1144 tcursor(CURSOR_SAVE);
1145 break;
1146 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1147 tcursor(CURSOR_LOAD);
1148 break;
1149 }
1150 }
1151
1152 void
1153 csidump(void) {
1154 int i;
1155 printf("ESC [ %s", escseq.priv ? "? " : "");
1156 if(escseq.narg)
1157 for(i = 0; i < escseq.narg; i++)
1158 printf("%d ", escseq.arg[i]);
1159 if(escseq.mode)
1160 putchar(escseq.mode);
1161 putchar('\n');
1162 }
1163
1164 void
1165 csireset(void) {
1166 memset(&escseq, 0, sizeof(escseq));
1167 }
1168
1169 void
1170 tputtab(void) {
1171 int space = TAB - term.c.x % TAB;
1172 tmoveto(term.c.x + space, term.c.y);
1173 }
1174
1175 void
1176 tputc(char *c) {
1177 char ascii = *c;
1178 if(term.esc & ESC_START) {
1179 if(term.esc & ESC_CSI) {
1180 escseq.buf[escseq.len++] = ascii;
1181 if(BETWEEN(ascii, 0x40, 0x7E) || escseq.len >= ESC_BUF_SIZ) {
1182 term.esc = 0;
1183 csiparse(), csihandle();
1184 }
1185 /* TODO: handle other OSC */
1186 } else if(term.esc & ESC_OSC) {
1187 if(ascii == ';') {
1188 term.titlelen = 0;
1189 term.esc = ESC_START | ESC_TITLE;
1190 }
1191 } else if(term.esc & ESC_TITLE) {
1192 if(ascii == '\a' || term.titlelen+1 >= ESC_TITLE_SIZ) {
1193 term.esc = 0;
1194 term.title[term.titlelen] = '\0';
1195 XStoreName(xw.dpy, xw.win, term.title);
1196 } else {
1197 term.title[term.titlelen++] = ascii;
1198 }
1199 } else if(term.esc & ESC_ALTCHARSET) {
1200 switch(ascii) {
1201 case '0': /* Line drawing crap */
1202 term.c.attr.mode |= ATTR_GFX;
1203 break;
1204 case 'B': /* Back to regular text */
1205 term.c.attr.mode &= ~ATTR_GFX;
1206 break;
1207 default:
1208 printf("esc unhandled charset: ESC ( %c\n", ascii);
1209 }
1210 term.esc = 0;
1211 } else {
1212 switch(ascii) {
1213 case '[':
1214 term.esc |= ESC_CSI;
1215 break;
1216 case ']':
1217 term.esc |= ESC_OSC;
1218 break;
1219 case '(':
1220 term.esc |= ESC_ALTCHARSET;
1221 break;
1222 case 'D': /* IND -- Linefeed */
1223 if(term.c.y == term.bot)
1224 tscrollup(term.top, 1);
1225 else
1226 tmoveto(term.c.x, term.c.y+1);
1227 term.esc = 0;
1228 break;
1229 case 'E': /* NEL -- Next line */
1230 tnewline(1); /* always go to first col */
1231 term.esc = 0;
1232 break;
1233 case 'M': /* RI -- Reverse index */
1234 if(term.c.y == term.top)
1235 tscrolldown(term.top, 1);
1236 else
1237 tmoveto(term.c.x, term.c.y-1);
1238 term.esc = 0;
1239 break;
1240 case 'c': /* RIS -- Reset to inital state */
1241 treset();
1242 term.esc = 0;
1243 break;
1244 case '=': /* DECPAM -- Application keypad */
1245 term.mode |= MODE_APPKEYPAD;
1246 term.esc = 0;
1247 break;
1248 case '>': /* DECPNM -- Normal keypad */
1249 term.mode &= ~MODE_APPKEYPAD;
1250 term.esc = 0;
1251 break;
1252 case '7': /* DECSC -- Save Cursor */
1253 tcursor(CURSOR_SAVE);
1254 term.esc = 0;
1255 break;
1256 case '8': /* DECRC -- Restore Cursor */
1257 tcursor(CURSOR_LOAD);
1258 term.esc = 0;
1259 break;
1260 default:
1261 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
1262 (unsigned char) ascii, isprint(ascii)?ascii:'.');
1263 term.esc = 0;
1264 }
1265 }
1266 } else {
1267 switch(ascii) {
1268 case '\t':
1269 tputtab();
1270 break;
1271 case '\b':
1272 tmoveto(term.c.x-1, term.c.y);
1273 break;
1274 case '\r':
1275 tmoveto(0, term.c.y);
1276 break;
1277 case '\f':
1278 case '\v':
1279 case '\n':
1280 /* go to first col if the mode is set */
1281 tnewline(IS_SET(MODE_CRLF));
1282 break;
1283 case '\a':
1284 if(!(xw.state & WIN_FOCUSED))
1285 xseturgency(1);
1286 break;
1287 case '\033':
1288 csireset();
1289 term.esc = ESC_START;
1290 break;
1291 default:
1292 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
1293 tnewline(1); /* always go to first col */
1294 tsetchar(c);
1295 if(term.c.x+1 < term.col)
1296 tmoveto(term.c.x+1, term.c.y);
1297 else
1298 term.c.state |= CURSOR_WRAPNEXT;
1299 break;
1300 }
1301 }
1302 }
1303
1304 int
1305 tresize(int col, int row) {
1306 int i, x;
1307 int minrow = MIN(row, term.row);
1308 int mincol = MIN(col, term.col);
1309 int slide = term.c.y - row + 1;
1310
1311 if(col < 1 || row < 1)
1312 return 0;
1313
1314 /* free unneeded rows */
1315 i = 0;
1316 if(slide > 0) {
1317 /* slide screen to keep cursor where we expect it -
1318 * tscrollup would work here, but we can optimize to
1319 * memmove because we're freeing the earlier lines */
1320 for(/* i = 0 */; i < slide; i++) {
1321 free(term.line[i]);
1322 free(term.alt[i]);
1323 }
1324 memmove(term.line, term.line + slide, row * sizeof(Line));
1325 memmove(term.alt, term.alt + slide, row * sizeof(Line));
1326 }
1327 for(i += row; i < term.row; i++) {
1328 free(term.line[i]);
1329 free(term.alt[i]);
1330 }
1331
1332 /* resize to new height */
1333 term.line = realloc(term.line, row * sizeof(Line));
1334 term.alt = realloc(term.alt, row * sizeof(Line));
1335
1336 /* resize each row to new width, zero-pad if needed */
1337 for(i = 0; i < minrow; i++) {
1338 term.line[i] = realloc(term.line[i], col * sizeof(Glyph));
1339 term.alt[i] = realloc(term.alt[i], col * sizeof(Glyph));
1340 for(x = mincol; x < col; x++) {
1341 term.line[i][x].state = 0;
1342 term.alt[i][x].state = 0;
1343 }
1344 }
1345
1346 /* allocate any new rows */
1347 for(/* i == minrow */; i < row; i++) {
1348 term.line[i] = calloc(col, sizeof(Glyph));
1349 term.alt [i] = calloc(col, sizeof(Glyph));
1350 }
1351
1352 /* update terminal size */
1353 term.col = col, term.row = row;
1354 /* make use of the LIMIT in tmoveto */
1355 tmoveto(term.c.x, term.c.y);
1356 /* reset scrolling region */
1357 tsetscroll(0, row-1);
1358 return (slide > 0);
1359 }
1360
1361 void
1362 xresize(int col, int row) {
1363 Pixmap newbuf;
1364 int oldw, oldh;
1365
1366 oldw = xw.bufw;
1367 oldh = xw.bufh;
1368 xw.bufw = MAX(1, col * xw.cw);
1369 xw.bufh = MAX(1, row * xw.ch);
1370 newbuf = XCreatePixmap(xw.dpy, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dpy, xw.scr));
1371 XCopyArea(xw.dpy, xw.buf, newbuf, dc.gc, 0, 0, xw.bufw, xw.bufh, 0, 0);
1372 XFreePixmap(xw.dpy, xw.buf);
1373 XSetForeground(xw.dpy, dc.gc, dc.col[DefaultBG]);
1374 if(xw.bufw > oldw)
1375 XFillRectangle(xw.dpy, newbuf, dc.gc, oldw, 0,
1376 xw.bufw-oldw, MIN(xw.bufh, oldh));
1377 else if(xw.bufw < oldw && (BORDER > 0 || xw.w > xw.bufw))
1378 XClearArea(xw.dpy, xw.win, BORDER+xw.bufw, BORDER,
1379 xw.w-xw.bufh-BORDER, BORDER+MIN(xw.bufh, oldh),
1380 False);
1381 if(xw.bufh > oldh)
1382 XFillRectangle(xw.dpy, newbuf, dc.gc, 0, oldh,
1383 xw.bufw, xw.bufh-oldh);
1384 else if(xw.bufh < oldh && (BORDER > 0 || xw.h > xw.bufh))
1385 XClearArea(xw.dpy, xw.win, BORDER, BORDER+xw.bufh,
1386 xw.w-2*BORDER, xw.h-xw.bufh-BORDER,
1387 False);
1388 xw.buf = newbuf;
1389 }
1390
1391 void
1392 xloadcols(void) {
1393 int i, r, g, b;
1394 XColor color;
1395 unsigned long white = WhitePixel(xw.dpy, xw.scr);
1396
1397 for(i = 0; i < 16; i++) {
1398 if (!XAllocNamedColor(xw.dpy, xw.cmap, colorname[i], &color, &color)) {
1399 dc.col[i] = white;
1400 fprintf(stderr, "Could not allocate color '%s'\n", colorname[i]);
1401 } else
1402 dc.col[i] = color.pixel;
1403 }
1404
1405 /* same colors as xterm */
1406 for(r = 0; r < 6; r++)
1407 for(g = 0; g < 6; g++)
1408 for(b = 0; b < 6; b++) {
1409 color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
1410 color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
1411 color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
1412 if (!XAllocColor(xw.dpy, xw.cmap, &color)) {
1413 dc.col[i] = white;
1414 fprintf(stderr, "Could not allocate color %d\n", i);
1415 } else
1416 dc.col[i] = color.pixel;
1417 i++;
1418 }
1419
1420 for(r = 0; r < 24; r++, i++) {
1421 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
1422 if (!XAllocColor(xw.dpy, xw.cmap, &color)) {
1423 dc.col[i] = white;
1424 fprintf(stderr, "Could not allocate color %d\n", i);
1425 } else
1426 dc.col[i] = color.pixel;
1427 }
1428 }
1429
1430 void
1431 xclear(int x1, int y1, int x2, int y2) {
1432 XSetForeground(xw.dpy, dc.gc, dc.col[DefaultBG]);
1433 XFillRectangle(xw.dpy, xw.buf, dc.gc,
1434 x1 * xw.cw, y1 * xw.ch,
1435 (x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch);
1436 }
1437
1438 void
1439 xhints(void)
1440 {
1441 XClassHint class = {opt_class ? opt_class : TNAME, TNAME};
1442 XWMHints wm = {.flags = InputHint, .input = 1};
1443 XSizeHints size = {
1444 .flags = PSize | PResizeInc | PBaseSize,
1445 .height = xw.h,
1446 .width = xw.w,
1447 .height_inc = xw.ch,
1448 .width_inc = xw.cw,
1449 .base_height = 2*BORDER,
1450 .base_width = 2*BORDER,
1451 };
1452 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, &size, &wm, &class);
1453 }
1454
1455 XFontSet
1456 xinitfont(char *fontstr)
1457 {
1458 XFontSet set;
1459 char *def, **missing;
1460 int n;
1461
1462 missing = NULL;
1463 set = XCreateFontSet(xw.dpy, fontstr, &missing, &n, &def);
1464 if(missing) {
1465 while(n--)
1466 fprintf(stderr, "st: missing fontset: %s\n", missing[n]);
1467 XFreeStringList(missing);
1468 }
1469 return set;
1470 }
1471
1472 void
1473 xgetfontinfo(XFontSet set, int *ascent, int *descent, short *lbearing, short *rbearing)
1474 {
1475 XFontStruct **xfonts;
1476 char **font_names;
1477 int i, n;
1478
1479 *ascent = *descent = *lbearing = *rbearing = 0;
1480 n = XFontsOfFontSet(set, &xfonts, &font_names);
1481 for(i = 0; i < n; i++) {
1482 *ascent = MAX(*ascent, (*xfonts)->ascent);
1483 *descent = MAX(*descent, (*xfonts)->descent);
1484 *lbearing = MAX(*lbearing, (*xfonts)->min_bounds.lbearing);
1485 *rbearing = MAX(*rbearing, (*xfonts)->max_bounds.rbearing);
1486 xfonts++;
1487 }
1488 }
1489
1490 void
1491 initfonts(char *fontstr, char *bfontstr)
1492 {
1493 if((dc.font.set = xinitfont(fontstr)) == NULL ||
1494 (dc.bfont.set = xinitfont(bfontstr)) == NULL)
1495 die("Can't load font %s\n", dc.font.set ? BOLDFONT : FONT);
1496 xgetfontinfo(dc.font.set, &dc.font.ascent, &dc.font.descent,
1497 &dc.font.lbearing, &dc.font.rbearing);
1498 xgetfontinfo(dc.bfont.set, &dc.bfont.ascent, &dc.bfont.descent,
1499 &dc.bfont.lbearing, &dc.bfont.rbearing);
1500 }
1501
1502 void
1503 xinit(void) {
1504 XSetWindowAttributes attrs;
1505
1506 if(!(xw.dpy = XOpenDisplay(NULL)))
1507 die("Can't open display\n");
1508 xw.scr = XDefaultScreen(xw.dpy);
1509
1510 /* font */
1511 initfonts(FONT, BOLDFONT);
1512
1513 /* XXX: Assuming same size for bold font */
1514 xw.cw = dc.font.rbearing - dc.font.lbearing;
1515 xw.ch = dc.font.ascent + dc.font.descent;
1516
1517 /* colors */
1518 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
1519 xloadcols();
1520
1521 /* window - default size */
1522 xw.bufh = 24 * xw.ch;
1523 xw.bufw = 80 * xw.cw;
1524 xw.h = xw.bufh + 2*BORDER;
1525 xw.w = xw.bufw + 2*BORDER;
1526
1527 attrs.background_pixel = dc.col[DefaultBG];
1528 attrs.border_pixel = dc.col[DefaultBG];
1529 attrs.bit_gravity = NorthWestGravity;
1530 attrs.event_mask = FocusChangeMask | KeyPressMask
1531 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
1532 | PointerMotionMask | ButtonPressMask | ButtonReleaseMask;
1533 attrs.colormap = xw.cmap;
1534
1535 xw.win = XCreateWindow(xw.dpy, XRootWindow(xw.dpy, xw.scr), 0, 0,
1536 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
1537 XDefaultVisual(xw.dpy, xw.scr),
1538 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
1539 | CWColormap,
1540 &attrs);
1541 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dpy, xw.scr));
1542
1543
1544 /* input methods */
1545 xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL);
1546 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
1547 | XIMStatusNothing, XNClientWindow, xw.win,
1548 XNFocusWindow, xw.win, NULL);
1549 /* gc */
1550 dc.gc = XCreateGC(xw.dpy, xw.win, 0, NULL);
1551
1552 XMapWindow(xw.dpy, xw.win);
1553 xhints();
1554 XStoreName(xw.dpy, xw.win, opt_title ? opt_title : "st");
1555 XSync(xw.dpy, 0);
1556 }
1557
1558 void
1559 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
1560 unsigned long xfg, xbg;
1561 int winx = x*xw.cw, winy = y*xw.ch + dc.font.ascent, width = charlen*xw.cw;
1562 int i;
1563
1564 if(base.mode & ATTR_REVERSE)
1565 xfg = dc.col[base.bg], xbg = dc.col[base.fg];
1566 else
1567 xfg = dc.col[base.fg], xbg = dc.col[base.bg];
1568
1569 XSetBackground(xw.dpy, dc.gc, xbg);
1570 XSetForeground(xw.dpy, dc.gc, xfg);
1571
1572 if(base.mode & ATTR_GFX) {
1573 for(i = 0; i < bytelen; i++) {
1574 char c = gfx[(unsigned int)s[i] % 256];
1575 if(c)
1576 s[i] = c;
1577 else if(s[i] > 0x5f)
1578 s[i] -= 0x5f;
1579 }
1580 }
1581
1582 XmbDrawImageString(xw.dpy, xw.buf, base.mode & ATTR_BOLD ? dc.bfont.set : dc.font.set,
1583 dc.gc, winx, winy, s, bytelen);
1584
1585 if(base.mode & ATTR_UNDERLINE)
1586 XDrawLine(xw.dpy, xw.buf, dc.gc, winx, winy+1, winx+width-1, winy+1);
1587 }
1588
1589 void
1590 xdrawcursor(void) {
1591 static int oldx = 0;
1592 static int oldy = 0;
1593 int sl;
1594 Glyph g = {{' '}, ATTR_NULL, DefaultBG, DefaultCS, 0};
1595
1596 LIMIT(oldx, 0, term.col-1);
1597 LIMIT(oldy, 0, term.row-1);
1598
1599 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
1600 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
1601
1602 /* remove the old cursor */
1603 if(term.line[oldy][oldx].state & GLYPH_SET) {
1604 sl = utf8size(term.line[oldy][oldx].c);
1605 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx, oldy, 1, sl);
1606 } else
1607 xclear(oldx, oldy, oldx, oldy);
1608
1609 /* draw the new one */
1610 if(!(term.c.state & CURSOR_HIDE) && (xw.state & WIN_FOCUSED)) {
1611 sl = utf8size(g.c);
1612 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
1613 oldx = term.c.x, oldy = term.c.y;
1614 }
1615 }
1616
1617 #ifdef DEBUG
1618 /* basic drawing routines */
1619 void
1620 xdrawc(int x, int y, Glyph g) {
1621 int sl = utf8size(g.c);
1622 XRectangle r = { x * xw.cw, y * xw.ch, xw.cw, xw.ch };
1623 XSetBackground(xw.dpy, dc.gc, dc.col[g.bg]);
1624 XSetForeground(xw.dpy, dc.gc, dc.col[g.fg]);
1625 XmbDrawImageString(xw.dpy, xw.buf, g.mode&ATTR_BOLD?dc.bfont.fs:dc.font.fs,
1626 dc.gc, r.x, r.y+dc.font.ascent, g.c, sl);
1627 }
1628
1629 void
1630 draw(int dummy) {
1631 int x, y;
1632
1633 xclear(0, 0, term.col-1, term.row-1);
1634 for(y = 0; y < term.row; y++)
1635 for(x = 0; x < term.col; x++)
1636 if(term.line[y][x].state & GLYPH_SET)
1637 xdrawc(x, y, term.line[y][x]);
1638
1639 xdrawcursor();
1640 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.bufw, xw.bufh, BORDER, BORDER);
1641 XFlush(xw.dpy);
1642 }
1643
1644 #else
1645 /* optimized drawing routine */
1646 void
1647 draw(int redraw_all) {
1648 int ic, ib, x, y, ox, sl;
1649 Glyph base, new;
1650 char buf[DRAW_BUF_SIZ];
1651
1652 if(!(xw.state & WIN_VISIBLE))
1653 return;
1654
1655 xclear(0, 0, term.col-1, term.row-1);
1656 for(y = 0; y < term.row; y++) {
1657 base = term.line[y][0];
1658 ic = ib = ox = 0;
1659 for(x = 0; x < term.col; x++) {
1660 new = term.line[y][x];
1661 if(sel.bx!=-1 && *(new.c) && selected(x, y))
1662 new.mode ^= ATTR_REVERSE;
1663 if(ib > 0 && (!(new.state & GLYPH_SET) || ATTRCMP(base, new) ||
1664 ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
1665 xdraws(buf, base, ox, y, ic, ib);
1666 ic = ib = 0;
1667 }
1668 if(new.state & GLYPH_SET) {
1669 if(ib == 0) {
1670 ox = x;
1671 base = new;
1672 }
1673 sl = utf8size(new.c);
1674 memcpy(buf+ib, new.c, sl);
1675 ib += sl;
1676 ++ic;
1677 }
1678 }
1679 if(ib > 0)
1680 xdraws(buf, base, ox, y, ic, ib);
1681 }
1682 xdrawcursor();
1683 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.bufw, xw.bufh, BORDER, BORDER);
1684 }
1685
1686 #endif
1687
1688 void
1689 expose(XEvent *ev) {
1690 XExposeEvent *e = &ev->xexpose;
1691 if(xw.state & WIN_REDRAW) {
1692 if(!e->count) {
1693 xw.state &= ~WIN_REDRAW;
1694 draw(SCREEN_REDRAW);
1695 }
1696 } else
1697 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, e->x-BORDER, e->y-BORDER,
1698 e->width, e->height, e->x, e->y);
1699 }
1700
1701 void
1702 visibility(XEvent *ev) {
1703 XVisibilityEvent *e = &ev->xvisibility;
1704 if(e->state == VisibilityFullyObscured)
1705 xw.state &= ~WIN_VISIBLE;
1706 else if(!(xw.state & WIN_VISIBLE))
1707 /* need a full redraw for next Expose, not just a buf copy */
1708 xw.state |= WIN_VISIBLE | WIN_REDRAW;
1709 }
1710
1711 void
1712 unmap(XEvent *ev) {
1713 xw.state &= ~WIN_VISIBLE;
1714 }
1715
1716 void
1717 xseturgency(int add) {
1718 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
1719 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
1720 XSetWMHints(xw.dpy, xw.win, h);
1721 XFree(h);
1722 }
1723
1724 void
1725 focus(XEvent *ev) {
1726 if(ev->type == FocusIn) {
1727 xw.state |= WIN_FOCUSED;
1728 xseturgency(0);
1729 } else
1730 xw.state &= ~WIN_FOCUSED;
1731 draw(SCREEN_UPDATE);
1732 }
1733
1734 char*
1735 kmap(KeySym k) {
1736 int i;
1737 for(i = 0; i < LEN(key); i++)
1738 if(key[i].k == k)
1739 return (char*)key[i].s;
1740 return NULL;
1741 }
1742
1743 void
1744 kpress(XEvent *ev) {
1745 XKeyEvent *e = &ev->xkey;
1746 KeySym ksym;
1747 char buf[32];
1748 char *customkey;
1749 int len;
1750 int meta;
1751 int shift;
1752 Status status;
1753
1754 meta = e->state & Mod1Mask;
1755 shift = e->state & ShiftMask;
1756 len = XmbLookupString(xw.xic, e, buf, sizeof(buf), &ksym, &status);
1757
1758 /* 1. custom keys from config.h */
1759 if((customkey = kmap(ksym)))
1760 ttywrite(customkey, strlen(customkey));
1761 /* 2. hardcoded (overrides X lookup) */
1762 else
1763 switch(ksym) {
1764 case XK_Up:
1765 case XK_Down:
1766 case XK_Left:
1767 case XK_Right:
1768 sprintf(buf, "\033%c%c", IS_SET(MODE_APPKEYPAD) ? 'O' : '[', "DACB"[ksym - XK_Left]);
1769 ttywrite(buf, 3);
1770 break;
1771 case XK_Insert:
1772 if(shift)
1773 selpaste();
1774 break;
1775 case XK_Return:
1776 if(IS_SET(MODE_CRLF))
1777 ttywrite("\r\n", 2);
1778 else
1779 ttywrite("\r", 1);
1780 break;
1781 /* 3. X lookup */
1782 default:
1783 if(len > 0) {
1784 if(meta && len == 1)
1785 ttywrite("\033", 1);
1786 ttywrite(buf, len);
1787 } else /* 4. nothing to send */
1788 fprintf(stderr, "errkey: %d\n", (int)ksym);
1789 break;
1790 }
1791 }
1792
1793 void
1794 resize(XEvent *e) {
1795 int col, row;
1796
1797 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
1798 return;
1799
1800 xw.w = e->xconfigure.width;
1801 xw.h = e->xconfigure.height;
1802 col = (xw.w - 2*BORDER) / xw.cw;
1803 row = (xw.h - 2*BORDER) / xw.ch;
1804 if(col == term.col && row == term.row)
1805 return;
1806 if(tresize(col, row))
1807 draw(SCREEN_REDRAW);
1808 ttyresize(col, row);
1809 xresize(col, row);
1810 }
1811
1812 void
1813 run(void) {
1814 XEvent ev;
1815 fd_set rfd;
1816 int xfd = XConnectionNumber(xw.dpy);
1817
1818 for(;;) {
1819 FD_ZERO(&rfd);
1820 FD_SET(cmdfd, &rfd);
1821 FD_SET(xfd, &rfd);
1822 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, NULL) < 0) {
1823 if(errno == EINTR)
1824 continue;
1825 die("select failed: %s\n", SERRNO);
1826 }
1827 if(FD_ISSET(cmdfd, &rfd)) {
1828 ttyread();
1829 draw(SCREEN_UPDATE);
1830 }
1831 while(XPending(xw.dpy)) {
1832 XNextEvent(xw.dpy, &ev);
1833 if (XFilterEvent(&ev, xw.win))
1834 continue;
1835 if(handler[ev.type])
1836 (handler[ev.type])(&ev);
1837 }
1838 }
1839 }
1840
1841 int
1842 main(int argc, char *argv[]) {
1843 int i;
1844
1845 for(i = 1; i < argc; i++) {
1846 switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
1847 case 't':
1848 if(++i < argc) opt_title = argv[i];
1849 break;
1850 case 'c':
1851 if(++i < argc) opt_class = argv[i];
1852 break;
1853 case 'e':
1854 if(++i < argc) opt_cmd = argv[i];
1855 break;
1856 case 'v':
1857 default:
1858 die(USAGE);
1859 }
1860 }
1861 setlocale(LC_CTYPE, "");
1862 tnew(80, 24);
1863 ttynew();
1864 xinit();
1865 selinit();
1866 run();
1867 return 0;
1868 }