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