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-e flag handles arguments.
[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;
549 char *envshell = getenv("SHELL");
550 DEFAULT(envshell, "sh");
551
552 if(opt_cmd)
553 args = (char*[]){"sh", "-c", opt_cmd, NULL};
554 else
555 args = (char*[]){envshell, "-i", NULL};
556
557 putenv("TERM="TNAME);
558 execvp(args[0], args);
559 }
560
561 void
562 sigchld(int a) {
563 int stat = 0;
564 if(waitpid(pid, &stat, 0) < 0)
565 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
566 if(WIFEXITED(stat))
567 exit(WEXITSTATUS(stat));
568 else
569 exit(EXIT_FAILURE);
570 }
571
572 void
573 ttynew(void) {
574 int m, s;
575
576 /* seems to work fine on linux, openbsd and freebsd */
577 struct winsize w = {term.row, term.col, 0, 0};
578 if(openpty(&m, &s, NULL, NULL, &w) < 0)
579 die("openpty failed: %s\n", SERRNO);
580
581 switch(pid = fork()) {
582 case -1:
583 die("fork failed\n");
584 break;
585 case 0:
586 setsid(); /* create a new process group */
587 dup2(s, STDIN_FILENO);
588 dup2(s, STDOUT_FILENO);
589 dup2(s, STDERR_FILENO);
590 if(ioctl(s, TIOCSCTTY, NULL) < 0)
591 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
592 close(s);
593 close(m);
594 execsh();
595 break;
596 default:
597 close(s);
598 cmdfd = m;
599 signal(SIGCHLD, sigchld);
600 }
601 }
602
603 void
604 dump(char c) {
605 static int col;
606 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
607 if(++col % 10 == 0)
608 fprintf(stderr, "\n");
609 }
610
611 void
612 ttyread(void) {
613 static char buf[BUFSIZ];
614 static int buflen = 0;
615 char *ptr;
616 char s[UTF_SIZ];
617 int charsize; /* size of utf8 char in bytes */
618 long utf8c;
619 int ret;
620
621 /* append read bytes to unprocessed bytes */
622 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
623 die("Couldn't read from shell: %s\n", SERRNO);
624
625 /* process every complete utf8 char */
626 buflen += ret;
627 ptr = buf;
628 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
629 charsize = utf8decode(ptr, &utf8c);
630 utf8encode(&utf8c, s);
631 tputc(s);
632 ptr += charsize;
633 buflen -= charsize;
634 }
635
636 /* keep any uncomplete utf8 char for the next call */
637 memmove(buf, ptr, buflen);
638 }
639
640 void
641 ttywrite(const char *s, size_t n) {
642 if(write(cmdfd, s, n) == -1)
643 die("write error on tty: %s\n", SERRNO);
644 }
645
646 void
647 ttyresize(int x, int y) {
648 struct winsize w;
649
650 w.ws_row = term.row;
651 w.ws_col = term.col;
652 w.ws_xpixel = w.ws_ypixel = 0;
653 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
654 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
655 }
656
657 void
658 tcursor(int mode) {
659 static TCursor c;
660
661 if(mode == CURSOR_SAVE)
662 c = term.c;
663 else if(mode == CURSOR_LOAD)
664 term.c = c, tmoveto(c.x, c.y);
665 }
666
667 void
668 treset(void) {
669 term.c = (TCursor){{
670 .mode = ATTR_NULL,
671 .fg = DefaultFG,
672 .bg = DefaultBG
673 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
674
675 term.top = 0, term.bot = term.row - 1;
676 term.mode = MODE_WRAP;
677 tclearregion(0, 0, term.col-1, term.row-1);
678 }
679
680 void
681 tnew(int col, int row) {
682 /* set screen size */
683 term.row = row, term.col = col;
684 term.line = malloc(term.row * sizeof(Line));
685 term.alt = malloc(term.row * sizeof(Line));
686 for(row = 0 ; row < term.row; row++) {
687 term.line[row] = malloc(term.col * sizeof(Glyph));
688 term.alt [row] = malloc(term.col * sizeof(Glyph));
689 }
690 /* setup screen */
691 treset();
692 }
693
694 void
695 tswapscreen(void) {
696 Line* tmp = term.line;
697 term.line = term.alt;
698 term.alt = tmp;
699 term.mode ^= MODE_ALTSCREEN;
700 }
701
702 void
703 tscrolldown(int orig, int n) {
704 int i;
705 Line temp;
706
707 LIMIT(n, 0, term.bot-orig+1);
708
709 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
710
711 for(i = term.bot; i >= orig+n; i--) {
712 temp = term.line[i];
713 term.line[i] = term.line[i-n];
714 term.line[i-n] = temp;
715 }
716 }
717
718 void
719 tscrollup(int orig, int n) {
720 int i;
721 Line temp;
722 LIMIT(n, 0, term.bot-orig+1);
723
724 tclearregion(0, orig, term.col-1, orig+n-1);
725
726 for(i = orig; i <= term.bot-n; i++) {
727 temp = term.line[i];
728 term.line[i] = term.line[i+n];
729 term.line[i+n] = temp;
730 }
731 }
732
733 void
734 tnewline(int first_col) {
735 int y = term.c.y;
736 if(y == term.bot)
737 tscrollup(term.top, 1);
738 else
739 y++;
740 tmoveto(first_col ? 0 : term.c.x, y);
741 }
742
743 void
744 csiparse(void) {
745 /* int noarg = 1; */
746 char *p = escseq.buf;
747
748 escseq.narg = 0;
749 if(*p == '?')
750 escseq.priv = 1, p++;
751
752 while(p < escseq.buf+escseq.len) {
753 while(isdigit(*p)) {
754 escseq.arg[escseq.narg] *= 10;
755 escseq.arg[escseq.narg] += *p++ - '0'/*, noarg = 0 */;
756 }
757 if(*p == ';' && escseq.narg+1 < ESC_ARG_SIZ)
758 escseq.narg++, p++;
759 else {
760 escseq.mode = *p;
761 escseq.narg++;
762 return;
763 }
764 }
765 }
766
767 void
768 tmoveto(int x, int y) {
769 LIMIT(x, 0, term.col-1);
770 LIMIT(y, 0, term.row-1);
771 term.c.state &= ~CURSOR_WRAPNEXT;
772 term.c.x = x;
773 term.c.y = y;
774 }
775
776 void
777 tsetchar(char *c) {
778 term.line[term.c.y][term.c.x] = term.c.attr;
779 memcpy(term.line[term.c.y][term.c.x].c, c, UTF_SIZ);
780 term.line[term.c.y][term.c.x].state |= GLYPH_SET;
781 }
782
783 void
784 tclearregion(int x1, int y1, int x2, int y2) {
785 int x, y, temp;
786
787 if(x1 > x2)
788 temp = x1, x1 = x2, x2 = temp;
789 if(y1 > y2)
790 temp = y1, y1 = y2, y2 = temp;
791
792 LIMIT(x1, 0, term.col-1);
793 LIMIT(x2, 0, term.col-1);
794 LIMIT(y1, 0, term.row-1);
795 LIMIT(y2, 0, term.row-1);
796
797 for(y = y1; y <= y2; y++)
798 for(x = x1; x <= x2; x++)
799 term.line[y][x].state = 0;
800 }
801
802 void
803 tdeletechar(int n) {
804 int src = term.c.x + n;
805 int dst = term.c.x;
806 int size = term.col - src;
807
808 if(src >= term.col) {
809 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
810 return;
811 }
812 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
813 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
814 }
815
816 void
817 tinsertblank(int n) {
818 int src = term.c.x;
819 int dst = src + n;
820 int size = term.col - dst;
821
822 if(dst >= term.col) {
823 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
824 return;
825 }
826 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
827 tclearregion(src, term.c.y, dst - 1, term.c.y);
828 }
829
830 void
831 tinsertblankline(int n) {
832 if(term.c.y < term.top || term.c.y > term.bot)
833 return;
834
835 tscrolldown(term.c.y, n);
836 }
837
838 void
839 tdeleteline(int n) {
840 if(term.c.y < term.top || term.c.y > term.bot)
841 return;
842
843 tscrollup(term.c.y, n);
844 }
845
846 void
847 tsetattr(int *attr, int l) {
848 int i;
849
850 for(i = 0; i < l; i++) {
851 switch(attr[i]) {
852 case 0:
853 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD);
854 term.c.attr.fg = DefaultFG;
855 term.c.attr.bg = DefaultBG;
856 break;
857 case 1:
858 term.c.attr.mode |= ATTR_BOLD;
859 break;
860 case 4:
861 term.c.attr.mode |= ATTR_UNDERLINE;
862 break;
863 case 7:
864 term.c.attr.mode |= ATTR_REVERSE;
865 break;
866 case 22:
867 term.c.attr.mode &= ~ATTR_BOLD;
868 break;
869 case 24:
870 term.c.attr.mode &= ~ATTR_UNDERLINE;
871 break;
872 case 27:
873 term.c.attr.mode &= ~ATTR_REVERSE;
874 break;
875 case 38:
876 if (i + 2 < l && attr[i + 1] == 5) {
877 i += 2;
878 if (BETWEEN(attr[i], 0, 255))
879 term.c.attr.fg = attr[i];
880 else
881 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[i]);
882 }
883 else
884 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
885 break;
886 case 39:
887 term.c.attr.fg = DefaultFG;
888 break;
889 case 48:
890 if (i + 2 < l && attr[i + 1] == 5) {
891 i += 2;
892 if (BETWEEN(attr[i], 0, 255))
893 term.c.attr.bg = attr[i];
894 else
895 fprintf(stderr, "erresc: bad bgcolor %d\n", attr[i]);
896 }
897 else
898 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
899 break;
900 case 49:
901 term.c.attr.bg = DefaultBG;
902 break;
903 default:
904 if(BETWEEN(attr[i], 30, 37))
905 term.c.attr.fg = attr[i] - 30;
906 else if(BETWEEN(attr[i], 40, 47))
907 term.c.attr.bg = attr[i] - 40;
908 else if(BETWEEN(attr[i], 90, 97))
909 term.c.attr.fg = attr[i] - 90 + 8;
910 else if(BETWEEN(attr[i], 100, 107))
911 term.c.attr.fg = attr[i] - 100 + 8;
912 else
913 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]), csidump();
914
915 break;
916 }
917 }
918 }
919
920 void
921 tsetscroll(int t, int b) {
922 int temp;
923
924 LIMIT(t, 0, term.row-1);
925 LIMIT(b, 0, term.row-1);
926 if(t > b) {
927 temp = t;
928 t = b;
929 b = temp;
930 }
931 term.top = t;
932 term.bot = b;
933 }
934
935 void
936 csihandle(void) {
937 switch(escseq.mode) {
938 default:
939 unknown:
940 printf("erresc: unknown csi ");
941 csidump();
942 /* die(""); */
943 break;
944 case '@': /* ICH -- Insert <n> blank char */
945 DEFAULT(escseq.arg[0], 1);
946 tinsertblank(escseq.arg[0]);
947 break;
948 case 'A': /* CUU -- Cursor <n> Up */
949 case 'e':
950 DEFAULT(escseq.arg[0], 1);
951 tmoveto(term.c.x, term.c.y-escseq.arg[0]);
952 break;
953 case 'B': /* CUD -- Cursor <n> Down */
954 DEFAULT(escseq.arg[0], 1);
955 tmoveto(term.c.x, term.c.y+escseq.arg[0]);
956 break;
957 case 'C': /* CUF -- Cursor <n> Forward */
958 case 'a':
959 DEFAULT(escseq.arg[0], 1);
960 tmoveto(term.c.x+escseq.arg[0], term.c.y);
961 break;
962 case 'D': /* CUB -- Cursor <n> Backward */
963 DEFAULT(escseq.arg[0], 1);
964 tmoveto(term.c.x-escseq.arg[0], term.c.y);
965 break;
966 case 'E': /* CNL -- Cursor <n> Down and first col */
967 DEFAULT(escseq.arg[0], 1);
968 tmoveto(0, term.c.y+escseq.arg[0]);
969 break;
970 case 'F': /* CPL -- Cursor <n> Up and first col */
971 DEFAULT(escseq.arg[0], 1);
972 tmoveto(0, term.c.y-escseq.arg[0]);
973 break;
974 case 'G': /* CHA -- Move to <col> */
975 case '`': /* XXX: HPA -- same? */
976 DEFAULT(escseq.arg[0], 1);
977 tmoveto(escseq.arg[0]-1, term.c.y);
978 break;
979 case 'H': /* CUP -- Move to <row> <col> */
980 case 'f': /* XXX: HVP -- same? */
981 DEFAULT(escseq.arg[0], 1);
982 DEFAULT(escseq.arg[1], 1);
983 tmoveto(escseq.arg[1]-1, escseq.arg[0]-1);
984 break;
985 /* XXX: (CSI n I) CHT -- Cursor Forward Tabulation <n> tab stops */
986 case 'J': /* ED -- Clear screen */
987 switch(escseq.arg[0]) {
988 case 0: /* below */
989 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
990 if(term.c.y < term.row-1)
991 tclearregion(0, term.c.y+1, term.col-1, term.row-1);
992 break;
993 case 1: /* above */
994 if(term.c.y > 1)
995 tclearregion(0, 0, term.col-1, term.c.y-1);
996 tclearregion(0, term.c.y, term.c.x, term.c.y);
997 break;
998 case 2: /* all */
999 tclearregion(0, 0, term.col-1, term.row-1);
1000 break;
1001 default:
1002 goto unknown;
1003 }
1004 break;
1005 case 'K': /* EL -- Clear line */
1006 switch(escseq.arg[0]) {
1007 case 0: /* right */
1008 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1009 break;
1010 case 1: /* left */
1011 tclearregion(0, term.c.y, term.c.x, term.c.y);
1012 break;
1013 case 2: /* all */
1014 tclearregion(0, term.c.y, term.col-1, term.c.y);
1015 break;
1016 }
1017 break;
1018 case 'S': /* SU -- Scroll <n> line up */
1019 DEFAULT(escseq.arg[0], 1);
1020 tscrollup(term.top, escseq.arg[0]);
1021 break;
1022 case 'T': /* SD -- Scroll <n> line down */
1023 DEFAULT(escseq.arg[0], 1);
1024 tscrolldown(term.top, escseq.arg[0]);
1025 break;
1026 case 'L': /* IL -- Insert <n> blank lines */
1027 DEFAULT(escseq.arg[0], 1);
1028 tinsertblankline(escseq.arg[0]);
1029 break;
1030 case 'l': /* RM -- Reset Mode */
1031 if(escseq.priv) {
1032 switch(escseq.arg[0]) {
1033 case 1:
1034 term.mode &= ~MODE_APPKEYPAD;
1035 break;
1036 case 5: /* TODO: DECSCNM -- Remove reverse video */
1037 break;
1038 case 7:
1039 term.mode &= ~MODE_WRAP;
1040 break;
1041 case 12: /* att610 -- Stop blinking cursor (IGNORED) */
1042 break;
1043 case 20:
1044 term.mode &= ~MODE_CRLF;
1045 break;
1046 case 25:
1047 term.c.state |= CURSOR_HIDE;
1048 break;
1049 case 1049: /* = 1047 and 1048 */
1050 case 1047:
1051 if(IS_SET(MODE_ALTSCREEN)) {
1052 tclearregion(0, 0, term.col-1, term.row-1);
1053 tswapscreen();
1054 }
1055 if(escseq.arg[0] == 1047)
1056 break;
1057 case 1048:
1058 tcursor(CURSOR_LOAD);
1059 break;
1060 default:
1061 goto unknown;
1062 }
1063 } else {
1064 switch(escseq.arg[0]) {
1065 case 4:
1066 term.mode &= ~MODE_INSERT;
1067 break;
1068 default:
1069 goto unknown;
1070 }
1071 }
1072 break;
1073 case 'M': /* DL -- Delete <n> lines */
1074 DEFAULT(escseq.arg[0], 1);
1075 tdeleteline(escseq.arg[0]);
1076 break;
1077 case 'X': /* ECH -- Erase <n> char */
1078 DEFAULT(escseq.arg[0], 1);
1079 tclearregion(term.c.x, term.c.y, term.c.x + escseq.arg[0], term.c.y);
1080 break;
1081 case 'P': /* DCH -- Delete <n> char */
1082 DEFAULT(escseq.arg[0], 1);
1083 tdeletechar(escseq.arg[0]);
1084 break;
1085 /* XXX: (CSI n Z) CBT -- Cursor Backward Tabulation <n> tab stops */
1086 case 'd': /* VPA -- Move to <row> */
1087 DEFAULT(escseq.arg[0], 1);
1088 tmoveto(term.c.x, escseq.arg[0]-1);
1089 break;
1090 case 'h': /* SM -- Set terminal mode */
1091 if(escseq.priv) {
1092 switch(escseq.arg[0]) {
1093 case 1:
1094 term.mode |= MODE_APPKEYPAD;
1095 break;
1096 case 5: /* DECSCNM -- Reverve video */
1097 /* TODO: set REVERSE on the whole screen (f) */
1098 break;
1099 case 7:
1100 term.mode |= MODE_WRAP;
1101 break;
1102 case 20:
1103 term.mode |= MODE_CRLF;
1104 break;
1105 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1106 /* fallthrough for xterm cvvis = CSI [ ? 12 ; 25 h */
1107 if(escseq.narg > 1 && escseq.arg[1] != 25)
1108 break;
1109 case 25:
1110 term.c.state &= ~CURSOR_HIDE;
1111 break;
1112 case 1049: /* = 1047 and 1048 */
1113 case 1047:
1114 if(IS_SET(MODE_ALTSCREEN))
1115 tclearregion(0, 0, term.col-1, term.row-1);
1116 else
1117 tswapscreen();
1118 if(escseq.arg[0] == 1047)
1119 break;
1120 case 1048:
1121 tcursor(CURSOR_SAVE);
1122 break;
1123 default: goto unknown;
1124 }
1125 } else {
1126 switch(escseq.arg[0]) {
1127 case 4:
1128 term.mode |= MODE_INSERT;
1129 break;
1130 default: goto unknown;
1131 }
1132 };
1133 break;
1134 case 'm': /* SGR -- Terminal attribute (color) */
1135 tsetattr(escseq.arg, escseq.narg);
1136 break;
1137 case 'r': /* DECSTBM -- Set Scrolling Region */
1138 if(escseq.priv)
1139 goto unknown;
1140 else {
1141 DEFAULT(escseq.arg[0], 1);
1142 DEFAULT(escseq.arg[1], term.row);
1143 tsetscroll(escseq.arg[0]-1, escseq.arg[1]-1);
1144 tmoveto(0, 0);
1145 }
1146 break;
1147 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1148 tcursor(CURSOR_SAVE);
1149 break;
1150 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1151 tcursor(CURSOR_LOAD);
1152 break;
1153 }
1154 }
1155
1156 void
1157 csidump(void) {
1158 int i;
1159 printf("ESC [ %s", escseq.priv ? "? " : "");
1160 if(escseq.narg)
1161 for(i = 0; i < escseq.narg; i++)
1162 printf("%d ", escseq.arg[i]);
1163 if(escseq.mode)
1164 putchar(escseq.mode);
1165 putchar('\n');
1166 }
1167
1168 void
1169 csireset(void) {
1170 memset(&escseq, 0, sizeof(escseq));
1171 }
1172
1173 void
1174 tputtab(void) {
1175 int space = TAB - term.c.x % TAB;
1176 tmoveto(term.c.x + space, term.c.y);
1177 }
1178
1179 void
1180 tputc(char *c) {
1181 char ascii = *c;
1182 if(term.esc & ESC_START) {
1183 if(term.esc & ESC_CSI) {
1184 escseq.buf[escseq.len++] = ascii;
1185 if(BETWEEN(ascii, 0x40, 0x7E) || escseq.len >= ESC_BUF_SIZ) {
1186 term.esc = 0;
1187 csiparse(), csihandle();
1188 }
1189 /* TODO: handle other OSC */
1190 } else if(term.esc & ESC_OSC) {
1191 if(ascii == ';') {
1192 term.titlelen = 0;
1193 term.esc = ESC_START | ESC_TITLE;
1194 }
1195 } else if(term.esc & ESC_TITLE) {
1196 if(ascii == '\a' || term.titlelen+1 >= ESC_TITLE_SIZ) {
1197 term.esc = 0;
1198 term.title[term.titlelen] = '\0';
1199 XStoreName(xw.dpy, xw.win, term.title);
1200 } else {
1201 term.title[term.titlelen++] = ascii;
1202 }
1203 } else if(term.esc & ESC_ALTCHARSET) {
1204 switch(ascii) {
1205 case '0': /* Line drawing crap */
1206 term.c.attr.mode |= ATTR_GFX;
1207 break;
1208 case 'B': /* Back to regular text */
1209 term.c.attr.mode &= ~ATTR_GFX;
1210 break;
1211 default:
1212 printf("esc unhandled charset: ESC ( %c\n", ascii);
1213 }
1214 term.esc = 0;
1215 } else {
1216 switch(ascii) {
1217 case '[':
1218 term.esc |= ESC_CSI;
1219 break;
1220 case ']':
1221 term.esc |= ESC_OSC;
1222 break;
1223 case '(':
1224 term.esc |= ESC_ALTCHARSET;
1225 break;
1226 case 'D': /* IND -- Linefeed */
1227 if(term.c.y == term.bot)
1228 tscrollup(term.top, 1);
1229 else
1230 tmoveto(term.c.x, term.c.y+1);
1231 term.esc = 0;
1232 break;
1233 case 'E': /* NEL -- Next line */
1234 tnewline(1); /* always go to first col */
1235 term.esc = 0;
1236 break;
1237 case 'M': /* RI -- Reverse index */
1238 if(term.c.y == term.top)
1239 tscrolldown(term.top, 1);
1240 else
1241 tmoveto(term.c.x, term.c.y-1);
1242 term.esc = 0;
1243 break;
1244 case 'c': /* RIS -- Reset to inital state */
1245 treset();
1246 term.esc = 0;
1247 break;
1248 case '=': /* DECPAM -- Application keypad */
1249 term.mode |= MODE_APPKEYPAD;
1250 term.esc = 0;
1251 break;
1252 case '>': /* DECPNM -- Normal keypad */
1253 term.mode &= ~MODE_APPKEYPAD;
1254 term.esc = 0;
1255 break;
1256 case '7': /* DECSC -- Save Cursor */
1257 tcursor(CURSOR_SAVE);
1258 term.esc = 0;
1259 break;
1260 case '8': /* DECRC -- Restore Cursor */
1261 tcursor(CURSOR_LOAD);
1262 term.esc = 0;
1263 break;
1264 default:
1265 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
1266 (unsigned char) ascii, isprint(ascii)?ascii:'.');
1267 term.esc = 0;
1268 }
1269 }
1270 } else {
1271 switch(ascii) {
1272 case '\t':
1273 tputtab();
1274 break;
1275 case '\b':
1276 tmoveto(term.c.x-1, term.c.y);
1277 break;
1278 case '\r':
1279 tmoveto(0, term.c.y);
1280 break;
1281 case '\f':
1282 case '\v':
1283 case '\n':
1284 /* go to first col if the mode is set */
1285 tnewline(IS_SET(MODE_CRLF));
1286 break;
1287 case '\a':
1288 if(!(xw.state & WIN_FOCUSED))
1289 xseturgency(1);
1290 break;
1291 case '\033':
1292 csireset();
1293 term.esc = ESC_START;
1294 break;
1295 default:
1296 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
1297 tnewline(1); /* always go to first col */
1298 tsetchar(c);
1299 if(term.c.x+1 < term.col)
1300 tmoveto(term.c.x+1, term.c.y);
1301 else
1302 term.c.state |= CURSOR_WRAPNEXT;
1303 break;
1304 }
1305 }
1306 }
1307
1308 int
1309 tresize(int col, int row) {
1310 int i, x;
1311 int minrow = MIN(row, term.row);
1312 int mincol = MIN(col, term.col);
1313 int slide = term.c.y - row + 1;
1314
1315 if(col < 1 || row < 1)
1316 return 0;
1317
1318 /* free unneeded rows */
1319 i = 0;
1320 if(slide > 0) {
1321 /* slide screen to keep cursor where we expect it -
1322 * tscrollup would work here, but we can optimize to
1323 * memmove because we're freeing the earlier lines */
1324 for(/* i = 0 */; i < slide; i++) {
1325 free(term.line[i]);
1326 free(term.alt[i]);
1327 }
1328 memmove(term.line, term.line + slide, row * sizeof(Line));
1329 memmove(term.alt, term.alt + slide, row * sizeof(Line));
1330 }
1331 for(i += row; i < term.row; i++) {
1332 free(term.line[i]);
1333 free(term.alt[i]);
1334 }
1335
1336 /* resize to new height */
1337 term.line = realloc(term.line, row * sizeof(Line));
1338 term.alt = realloc(term.alt, row * sizeof(Line));
1339
1340 /* resize each row to new width, zero-pad if needed */
1341 for(i = 0; i < minrow; i++) {
1342 term.line[i] = realloc(term.line[i], col * sizeof(Glyph));
1343 term.alt[i] = realloc(term.alt[i], col * sizeof(Glyph));
1344 for(x = mincol; x < col; x++) {
1345 term.line[i][x].state = 0;
1346 term.alt[i][x].state = 0;
1347 }
1348 }
1349
1350 /* allocate any new rows */
1351 for(/* i == minrow */; i < row; i++) {
1352 term.line[i] = calloc(col, sizeof(Glyph));
1353 term.alt [i] = calloc(col, sizeof(Glyph));
1354 }
1355
1356 /* update terminal size */
1357 term.col = col, term.row = row;
1358 /* make use of the LIMIT in tmoveto */
1359 tmoveto(term.c.x, term.c.y);
1360 /* reset scrolling region */
1361 tsetscroll(0, row-1);
1362 return (slide > 0);
1363 }
1364
1365 void
1366 xresize(int col, int row) {
1367 Pixmap newbuf;
1368 int oldw, oldh;
1369
1370 oldw = xw.bufw;
1371 oldh = xw.bufh;
1372 xw.bufw = MAX(1, col * xw.cw);
1373 xw.bufh = MAX(1, row * xw.ch);
1374 newbuf = XCreatePixmap(xw.dpy, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dpy, xw.scr));
1375 XCopyArea(xw.dpy, xw.buf, newbuf, dc.gc, 0, 0, xw.bufw, xw.bufh, 0, 0);
1376 XFreePixmap(xw.dpy, xw.buf);
1377 XSetForeground(xw.dpy, dc.gc, dc.col[DefaultBG]);
1378 if(xw.bufw > oldw)
1379 XFillRectangle(xw.dpy, newbuf, dc.gc, oldw, 0,
1380 xw.bufw-oldw, MIN(xw.bufh, oldh));
1381 else if(xw.bufw < oldw && (BORDER > 0 || xw.w > xw.bufw))
1382 XClearArea(xw.dpy, xw.win, BORDER+xw.bufw, BORDER,
1383 xw.w-xw.bufh-BORDER, BORDER+MIN(xw.bufh, oldh),
1384 False);
1385 if(xw.bufh > oldh)
1386 XFillRectangle(xw.dpy, newbuf, dc.gc, 0, oldh,
1387 xw.bufw, xw.bufh-oldh);
1388 else if(xw.bufh < oldh && (BORDER > 0 || xw.h > xw.bufh))
1389 XClearArea(xw.dpy, xw.win, BORDER, BORDER+xw.bufh,
1390 xw.w-2*BORDER, xw.h-xw.bufh-BORDER,
1391 False);
1392 xw.buf = newbuf;
1393 }
1394
1395 void
1396 xloadcols(void) {
1397 int i, r, g, b;
1398 XColor color;
1399 unsigned long white = WhitePixel(xw.dpy, xw.scr);
1400
1401 for(i = 0; i < 16; i++) {
1402 if (!XAllocNamedColor(xw.dpy, xw.cmap, colorname[i], &color, &color)) {
1403 dc.col[i] = white;
1404 fprintf(stderr, "Could not allocate color '%s'\n", colorname[i]);
1405 } else
1406 dc.col[i] = color.pixel;
1407 }
1408
1409 /* same colors as xterm */
1410 for(r = 0; r < 6; r++)
1411 for(g = 0; g < 6; g++)
1412 for(b = 0; b < 6; b++) {
1413 color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
1414 color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
1415 color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
1416 if (!XAllocColor(xw.dpy, xw.cmap, &color)) {
1417 dc.col[i] = white;
1418 fprintf(stderr, "Could not allocate color %d\n", i);
1419 } else
1420 dc.col[i] = color.pixel;
1421 i++;
1422 }
1423
1424 for(r = 0; r < 24; r++, i++) {
1425 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
1426 if (!XAllocColor(xw.dpy, xw.cmap, &color)) {
1427 dc.col[i] = white;
1428 fprintf(stderr, "Could not allocate color %d\n", i);
1429 } else
1430 dc.col[i] = color.pixel;
1431 }
1432 }
1433
1434 void
1435 xclear(int x1, int y1, int x2, int y2) {
1436 XSetForeground(xw.dpy, dc.gc, dc.col[DefaultBG]);
1437 XFillRectangle(xw.dpy, xw.buf, dc.gc,
1438 x1 * xw.cw, y1 * xw.ch,
1439 (x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch);
1440 }
1441
1442 void
1443 xhints(void)
1444 {
1445 XClassHint class = {opt_class ? opt_class : TNAME, TNAME};
1446 XWMHints wm = {.flags = InputHint, .input = 1};
1447 XSizeHints size = {
1448 .flags = PSize | PResizeInc | PBaseSize,
1449 .height = xw.h,
1450 .width = xw.w,
1451 .height_inc = xw.ch,
1452 .width_inc = xw.cw,
1453 .base_height = 2*BORDER,
1454 .base_width = 2*BORDER,
1455 };
1456 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, &size, &wm, &class);
1457 }
1458
1459 XFontSet
1460 xinitfont(char *fontstr)
1461 {
1462 XFontSet set;
1463 char *def, **missing;
1464 int n;
1465
1466 missing = NULL;
1467 set = XCreateFontSet(xw.dpy, fontstr, &missing, &n, &def);
1468 if(missing) {
1469 while(n--)
1470 fprintf(stderr, "st: missing fontset: %s\n", missing[n]);
1471 XFreeStringList(missing);
1472 }
1473 return set;
1474 }
1475
1476 void
1477 xgetfontinfo(XFontSet set, int *ascent, int *descent, short *lbearing, short *rbearing)
1478 {
1479 XFontStruct **xfonts;
1480 char **font_names;
1481 int i, n;
1482
1483 *ascent = *descent = *lbearing = *rbearing = 0;
1484 n = XFontsOfFontSet(set, &xfonts, &font_names);
1485 for(i = 0; i < n; i++) {
1486 *ascent = MAX(*ascent, (*xfonts)->ascent);
1487 *descent = MAX(*descent, (*xfonts)->descent);
1488 *lbearing = MAX(*lbearing, (*xfonts)->min_bounds.lbearing);
1489 *rbearing = MAX(*rbearing, (*xfonts)->max_bounds.rbearing);
1490 xfonts++;
1491 }
1492 }
1493
1494 void
1495 initfonts(char *fontstr, char *bfontstr)
1496 {
1497 if((dc.font.set = xinitfont(fontstr)) == NULL ||
1498 (dc.bfont.set = xinitfont(bfontstr)) == NULL)
1499 die("Can't load font %s\n", dc.font.set ? BOLDFONT : FONT);
1500 xgetfontinfo(dc.font.set, &dc.font.ascent, &dc.font.descent,
1501 &dc.font.lbearing, &dc.font.rbearing);
1502 xgetfontinfo(dc.bfont.set, &dc.bfont.ascent, &dc.bfont.descent,
1503 &dc.bfont.lbearing, &dc.bfont.rbearing);
1504 }
1505
1506 void
1507 xinit(void) {
1508 XSetWindowAttributes attrs;
1509
1510 if(!(xw.dpy = XOpenDisplay(NULL)))
1511 die("Can't open display\n");
1512 xw.scr = XDefaultScreen(xw.dpy);
1513
1514 /* font */
1515 initfonts(FONT, BOLDFONT);
1516
1517 /* XXX: Assuming same size for bold font */
1518 xw.cw = dc.font.rbearing - dc.font.lbearing;
1519 xw.ch = dc.font.ascent + dc.font.descent;
1520
1521 /* colors */
1522 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
1523 xloadcols();
1524
1525 /* window - default size */
1526 xw.bufh = 24 * xw.ch;
1527 xw.bufw = 80 * xw.cw;
1528 xw.h = xw.bufh + 2*BORDER;
1529 xw.w = xw.bufw + 2*BORDER;
1530
1531 attrs.background_pixel = dc.col[DefaultBG];
1532 attrs.border_pixel = dc.col[DefaultBG];
1533 attrs.bit_gravity = NorthWestGravity;
1534 attrs.event_mask = FocusChangeMask | KeyPressMask
1535 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
1536 | PointerMotionMask | ButtonPressMask | ButtonReleaseMask;
1537 attrs.colormap = xw.cmap;
1538
1539 xw.win = XCreateWindow(xw.dpy, XRootWindow(xw.dpy, xw.scr), 0, 0,
1540 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
1541 XDefaultVisual(xw.dpy, xw.scr),
1542 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
1543 | CWColormap,
1544 &attrs);
1545 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dpy, xw.scr));
1546
1547
1548 /* input methods */
1549 xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL);
1550 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
1551 | XIMStatusNothing, XNClientWindow, xw.win,
1552 XNFocusWindow, xw.win, NULL);
1553 /* gc */
1554 dc.gc = XCreateGC(xw.dpy, xw.win, 0, NULL);
1555
1556 XMapWindow(xw.dpy, xw.win);
1557 xhints();
1558 XStoreName(xw.dpy, xw.win, opt_title ? opt_title : "st");
1559 XSync(xw.dpy, 0);
1560 }
1561
1562 void
1563 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
1564 unsigned long xfg, xbg;
1565 int winx = x*xw.cw, winy = y*xw.ch + dc.font.ascent, width = charlen*xw.cw;
1566 int i;
1567
1568 if(base.mode & ATTR_REVERSE)
1569 xfg = dc.col[base.bg], xbg = dc.col[base.fg];
1570 else
1571 xfg = dc.col[base.fg], xbg = dc.col[base.bg];
1572
1573 XSetBackground(xw.dpy, dc.gc, xbg);
1574 XSetForeground(xw.dpy, dc.gc, xfg);
1575
1576 if(base.mode & ATTR_GFX) {
1577 for(i = 0; i < bytelen; i++) {
1578 char c = gfx[(unsigned int)s[i] % 256];
1579 if(c)
1580 s[i] = c;
1581 else if(s[i] > 0x5f)
1582 s[i] -= 0x5f;
1583 }
1584 }
1585
1586 XmbDrawImageString(xw.dpy, xw.buf, base.mode & ATTR_BOLD ? dc.bfont.set : dc.font.set,
1587 dc.gc, winx, winy, s, bytelen);
1588
1589 if(base.mode & ATTR_UNDERLINE)
1590 XDrawLine(xw.dpy, xw.buf, dc.gc, winx, winy+1, winx+width-1, winy+1);
1591 }
1592
1593 void
1594 xdrawcursor(void) {
1595 static int oldx = 0;
1596 static int oldy = 0;
1597 int sl;
1598 Glyph g = {{' '}, ATTR_NULL, DefaultBG, DefaultCS, 0};
1599
1600 LIMIT(oldx, 0, term.col-1);
1601 LIMIT(oldy, 0, term.row-1);
1602
1603 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
1604 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
1605
1606 /* remove the old cursor */
1607 if(term.line[oldy][oldx].state & GLYPH_SET) {
1608 sl = utf8size(term.line[oldy][oldx].c);
1609 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx, oldy, 1, sl);
1610 } else
1611 xclear(oldx, oldy, oldx, oldy);
1612
1613 /* draw the new one */
1614 if(!(term.c.state & CURSOR_HIDE) && (xw.state & WIN_FOCUSED)) {
1615 sl = utf8size(g.c);
1616 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
1617 oldx = term.c.x, oldy = term.c.y;
1618 }
1619 }
1620
1621 #ifdef DEBUG
1622 /* basic drawing routines */
1623 void
1624 xdrawc(int x, int y, Glyph g) {
1625 int sl = utf8size(g.c);
1626 XRectangle r = { x * xw.cw, y * xw.ch, xw.cw, xw.ch };
1627 XSetBackground(xw.dpy, dc.gc, dc.col[g.bg]);
1628 XSetForeground(xw.dpy, dc.gc, dc.col[g.fg]);
1629 XmbDrawImageString(xw.dpy, xw.buf, g.mode&ATTR_BOLD?dc.bfont.fs:dc.font.fs,
1630 dc.gc, r.x, r.y+dc.font.ascent, g.c, sl);
1631 }
1632
1633 void
1634 draw(int dummy) {
1635 int x, y;
1636
1637 xclear(0, 0, term.col-1, term.row-1);
1638 for(y = 0; y < term.row; y++)
1639 for(x = 0; x < term.col; x++)
1640 if(term.line[y][x].state & GLYPH_SET)
1641 xdrawc(x, y, term.line[y][x]);
1642
1643 xdrawcursor();
1644 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.bufw, xw.bufh, BORDER, BORDER);
1645 XFlush(xw.dpy);
1646 }
1647
1648 #else
1649 /* optimized drawing routine */
1650 void
1651 draw(int redraw_all) {
1652 int ic, ib, x, y, ox, sl;
1653 Glyph base, new;
1654 char buf[DRAW_BUF_SIZ];
1655
1656 if(!(xw.state & WIN_VISIBLE))
1657 return;
1658
1659 xclear(0, 0, term.col-1, term.row-1);
1660 for(y = 0; y < term.row; y++) {
1661 base = term.line[y][0];
1662 ic = ib = ox = 0;
1663 for(x = 0; x < term.col; x++) {
1664 new = term.line[y][x];
1665 if(sel.bx!=-1 && *(new.c) && selected(x, y))
1666 new.mode ^= ATTR_REVERSE;
1667 if(ib > 0 && (!(new.state & GLYPH_SET) || ATTRCMP(base, new) ||
1668 ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
1669 xdraws(buf, base, ox, y, ic, ib);
1670 ic = ib = 0;
1671 }
1672 if(new.state & GLYPH_SET) {
1673 if(ib == 0) {
1674 ox = x;
1675 base = new;
1676 }
1677 sl = utf8size(new.c);
1678 memcpy(buf+ib, new.c, sl);
1679 ib += sl;
1680 ++ic;
1681 }
1682 }
1683 if(ib > 0)
1684 xdraws(buf, base, ox, y, ic, ib);
1685 }
1686 xdrawcursor();
1687 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.bufw, xw.bufh, BORDER, BORDER);
1688 }
1689
1690 #endif
1691
1692 void
1693 expose(XEvent *ev) {
1694 XExposeEvent *e = &ev->xexpose;
1695 if(xw.state & WIN_REDRAW) {
1696 if(!e->count) {
1697 xw.state &= ~WIN_REDRAW;
1698 draw(SCREEN_REDRAW);
1699 }
1700 } else
1701 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, e->x-BORDER, e->y-BORDER,
1702 e->width, e->height, e->x, e->y);
1703 }
1704
1705 void
1706 visibility(XEvent *ev) {
1707 XVisibilityEvent *e = &ev->xvisibility;
1708 if(e->state == VisibilityFullyObscured)
1709 xw.state &= ~WIN_VISIBLE;
1710 else if(!(xw.state & WIN_VISIBLE))
1711 /* need a full redraw for next Expose, not just a buf copy */
1712 xw.state |= WIN_VISIBLE | WIN_REDRAW;
1713 }
1714
1715 void
1716 unmap(XEvent *ev) {
1717 xw.state &= ~WIN_VISIBLE;
1718 }
1719
1720 void
1721 xseturgency(int add) {
1722 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
1723 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
1724 XSetWMHints(xw.dpy, xw.win, h);
1725 XFree(h);
1726 }
1727
1728 void
1729 focus(XEvent *ev) {
1730 if(ev->type == FocusIn) {
1731 xw.state |= WIN_FOCUSED;
1732 xseturgency(0);
1733 } else
1734 xw.state &= ~WIN_FOCUSED;
1735 draw(SCREEN_UPDATE);
1736 }
1737
1738 char*
1739 kmap(KeySym k) {
1740 int i;
1741 for(i = 0; i < LEN(key); i++)
1742 if(key[i].k == k)
1743 return (char*)key[i].s;
1744 return NULL;
1745 }
1746
1747 void
1748 kpress(XEvent *ev) {
1749 XKeyEvent *e = &ev->xkey;
1750 KeySym ksym;
1751 char buf[32];
1752 char *customkey;
1753 int len;
1754 int meta;
1755 int shift;
1756 Status status;
1757
1758 meta = e->state & Mod1Mask;
1759 shift = e->state & ShiftMask;
1760 len = XmbLookupString(xw.xic, e, buf, sizeof(buf), &ksym, &status);
1761
1762 /* 1. custom keys from config.h */
1763 if((customkey = kmap(ksym)))
1764 ttywrite(customkey, strlen(customkey));
1765 /* 2. hardcoded (overrides X lookup) */
1766 else
1767 switch(ksym) {
1768 case XK_Up:
1769 case XK_Down:
1770 case XK_Left:
1771 case XK_Right:
1772 sprintf(buf, "\033%c%c", IS_SET(MODE_APPKEYPAD) ? 'O' : '[', "DACB"[ksym - XK_Left]);
1773 ttywrite(buf, 3);
1774 break;
1775 case XK_Insert:
1776 if(shift)
1777 selpaste();
1778 break;
1779 case XK_Return:
1780 if(IS_SET(MODE_CRLF))
1781 ttywrite("\r\n", 2);
1782 else
1783 ttywrite("\r", 1);
1784 break;
1785 /* 3. X lookup */
1786 default:
1787 if(len > 0) {
1788 if(meta && len == 1)
1789 ttywrite("\033", 1);
1790 ttywrite(buf, len);
1791 } else /* 4. nothing to send */
1792 fprintf(stderr, "errkey: %d\n", (int)ksym);
1793 break;
1794 }
1795 }
1796
1797 void
1798 resize(XEvent *e) {
1799 int col, row;
1800
1801 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
1802 return;
1803
1804 xw.w = e->xconfigure.width;
1805 xw.h = e->xconfigure.height;
1806 col = (xw.w - 2*BORDER) / xw.cw;
1807 row = (xw.h - 2*BORDER) / xw.ch;
1808 if(col == term.col && row == term.row)
1809 return;
1810 if(tresize(col, row))
1811 draw(SCREEN_REDRAW);
1812 ttyresize(col, row);
1813 xresize(col, row);
1814 }
1815
1816 void
1817 run(void) {
1818 XEvent ev;
1819 fd_set rfd;
1820 int xfd = XConnectionNumber(xw.dpy);
1821
1822 for(;;) {
1823 FD_ZERO(&rfd);
1824 FD_SET(cmdfd, &rfd);
1825 FD_SET(xfd, &rfd);
1826 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, NULL) < 0) {
1827 if(errno == EINTR)
1828 continue;
1829 die("select failed: %s\n", SERRNO);
1830 }
1831 if(FD_ISSET(cmdfd, &rfd)) {
1832 ttyread();
1833 draw(SCREEN_UPDATE);
1834 }
1835 while(XPending(xw.dpy)) {
1836 XNextEvent(xw.dpy, &ev);
1837 if (XFilterEvent(&ev, xw.win))
1838 continue;
1839 if(handler[ev.type])
1840 (handler[ev.type])(&ev);
1841 }
1842 }
1843 }
1844
1845 int
1846 main(int argc, char *argv[]) {
1847 int i;
1848
1849 for(i = 1; i < argc; i++) {
1850 switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
1851 case 't':
1852 if(++i < argc) opt_title = argv[i];
1853 break;
1854 case 'c':
1855 if(++i < argc) opt_class = argv[i];
1856 break;
1857 case 'e':
1858 if(++i < argc) opt_cmd = argv[i];
1859 break;
1860 case 'v':
1861 default:
1862 die(USAGE);
1863 }
1864 }
1865 setlocale(LC_CTYPE, "");
1866 tnew(80, 24);
1867 ttynew();
1868 xinit();
1869 selinit();
1870 run();
1871 return 0;
1872 }