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