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add support for utf8 clipboard. fix usage message.
[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/Xatom.h>
20 #include <X11/Xlib.h>
21 #include <X11/Xutil.h>
22 #include <X11/cursorfont.h>
23 #include <X11/keysym.h>
24
25 #if defined(__linux)
26 #include <pty.h>
27 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
28 #include <util.h>
29 #elif defined(__FreeBSD__) || defined(__DragonFly__)
30 #include <libutil.h>
31 #endif
32
33 #define USAGE \
34 "st-" VERSION ", (c) 2010 st engineers\n" \
35 "usage: st [-t title] [-c class] [-v] [-e cmd]\n"
36
37 /* Arbitrary sizes */
38 #define ESC_TITLE_SIZ 256
39 #define ESC_BUF_SIZ 256
40 #define ESC_ARG_SIZ 16
41 #define DRAW_BUF_SIZ 1024
42 #define UTF_SIZ 4
43
44 #define SERRNO strerror(errno)
45 #define MIN(a, b) ((a) < (b) ? (a) : (b))
46 #define MAX(a, b) ((a) < (b) ? (b) : (a))
47 #define LEN(a) (sizeof(a) / sizeof(a[0]))
48 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
49 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
50 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
51 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
52 #define IS_SET(flag) (term.mode & (flag))
53
54 /* Attribute, Cursor, Character state, Terminal mode, Screen draw mode */
55 enum { ATTR_NULL=0 , ATTR_REVERSE=1 , ATTR_UNDERLINE=2, ATTR_BOLD=4, ATTR_GFX=8 };
56 enum { CURSOR_UP, CURSOR_DOWN, CURSOR_LEFT, CURSOR_RIGHT,
57 CURSOR_SAVE, CURSOR_LOAD };
58 enum { CURSOR_DEFAULT = 0, CURSOR_HIDE = 1, CURSOR_WRAPNEXT = 2 };
59 enum { GLYPH_SET=1, GLYPH_DIRTY=2 };
60 enum { MODE_WRAP=1, MODE_INSERT=2, MODE_APPKEYPAD=4, MODE_ALTSCREEN=8,
61 MODE_CRLF=16 };
62 enum { ESC_START=1, ESC_CSI=2, ESC_OSC=4, ESC_TITLE=8, ESC_ALTCHARSET=16 };
63 enum { SCREEN_UPDATE, SCREEN_REDRAW };
64 enum { WIN_VISIBLE=1, WIN_REDRAW=2, WIN_FOCUSED=4 };
65
66 #undef B0
67 enum { B0=1, B1=2, B2=4, B3=8, B4=16, B5=32, B6=64, B7=128 };
68
69 typedef struct {
70 char c[UTF_SIZ]; /* character code */
71 char mode; /* attribute flags */
72 int fg; /* foreground */
73 int bg; /* background */
74 char state; /* state flags */
75 } Glyph;
76
77 typedef Glyph* Line;
78
79 typedef struct {
80 Glyph attr; /* current char attributes */
81 int x;
82 int y;
83 char state;
84 } TCursor;
85
86 /* CSI Escape sequence structs */
87 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
88 typedef struct {
89 char buf[ESC_BUF_SIZ]; /* raw string */
90 int len; /* raw string length */
91 char priv;
92 int arg[ESC_ARG_SIZ];
93 int narg; /* nb of args */
94 char mode;
95 } CSIEscape;
96
97 /* Internal representation of the screen */
98 typedef struct {
99 int row; /* nb row */
100 int col; /* nb col */
101 Line* line; /* screen */
102 Line* alt; /* alternate screen */
103 TCursor c; /* cursor */
104 int top; /* top scroll limit */
105 int bot; /* bottom scroll limit */
106 int mode; /* terminal mode flags */
107 int esc; /* escape state flags */
108 char title[ESC_TITLE_SIZ];
109 int titlelen;
110 } Term;
111
112 /* Purely graphic info */
113 typedef struct {
114 Display* dpy;
115 Colormap cmap;
116 Window win;
117 Pixmap buf;
118 XIM xim;
119 XIC xic;
120 int scr;
121 int w; /* window width */
122 int h; /* window height */
123 int bufw; /* pixmap width */
124 int bufh; /* pixmap height */
125 int ch; /* char height */
126 int cw; /* char width */
127 char state; /* focus, redraw, visible */
128 } XWindow;
129
130 typedef struct {
131 KeySym k;
132 char s[ESC_BUF_SIZ];
133 } Key;
134
135 /* Drawing Context */
136 typedef struct {
137 unsigned long col[256];
138 GC gc;
139 struct {
140 int ascent;
141 int descent;
142 short lbearing;
143 short rbearing;
144 XFontSet set;
145 } font, bfont;
146 } DC;
147
148 /* TODO: use better name for vars... */
149 typedef struct {
150 int mode;
151 int bx, by;
152 int ex, ey;
153 struct {int x, y;} b, e;
154 char *clip;
155 Atom xtarget;
156 } Selection;
157
158 #include "config.h"
159
160 static void die(const char *errstr, ...);
161 static void draw(int);
162 static void execsh(void);
163 static void sigchld(int);
164 static void run(void);
165
166 static void csidump(void);
167 static void csihandle(void);
168 static void csiparse(void);
169 static void csireset(void);
170
171 static void tclearregion(int, int, int, int);
172 static void tcursor(int);
173 static void tdeletechar(int);
174 static void tdeleteline(int);
175 static void tinsertblank(int);
176 static void tinsertblankline(int);
177 static void tmoveto(int, int);
178 static void tnew(int, int);
179 static void tnewline(int);
180 static void tputtab(void);
181 static void tputc(char*);
182 static void treset(void);
183 static int tresize(int, int);
184 static void tscrollup(int, int);
185 static void tscrolldown(int, int);
186 static void tsetattr(int*, int);
187 static void tsetchar(char*);
188 static void tsetscroll(int, int);
189 static void tswapscreen(void);
190
191 static void ttynew(void);
192 static void ttyread(void);
193 static void ttyresize(int, int);
194 static void ttywrite(const char *, size_t);
195
196 static void xdraws(char *, Glyph, int, int, int, int);
197 static void xhints(void);
198 static void xclear(int, int, int, int);
199 static void xdrawcursor(void);
200 static void xinit(void);
201 static void xloadcols(void);
202 static void xseturgency(int);
203 static void xsetsel(char*);
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 selnotify(XEvent *);
217 static void selrequest(XEvent *);
218
219 static void selinit(void);
220 static inline int selected(int, int);
221 static void selcopy(void);
222 static void selpaste(void);
223
224 static int utf8decode(char *, long *);
225 static int utf8encode(long *, char *);
226 static int utf8size(char *);
227 static int isfullutf8(char *, int);
228
229 static void (*handler[LASTEvent])(XEvent *) = {
230 [KeyPress] = kpress,
231 [ConfigureNotify] = resize,
232 [VisibilityNotify] = visibility,
233 [UnmapNotify] = unmap,
234 [Expose] = expose,
235 [FocusIn] = focus,
236 [FocusOut] = focus,
237 [MotionNotify] = bmotion,
238 [ButtonPress] = bpress,
239 [ButtonRelease] = brelease,
240 [SelectionNotify] = selnotify,
241 [SelectionRequest] = selrequest,
242 };
243
244 /* Globals */
245 static DC dc;
246 static XWindow xw;
247 static Term term;
248 static CSIEscape escseq;
249 static int cmdfd;
250 static pid_t pid;
251 static Selection sel;
252 static char **opt_cmd = NULL;
253 static char *opt_title = NULL;
254 static char *opt_class = NULL;
255
256 int
257 utf8decode(char *s, long *u) {
258 unsigned char c;
259 int i, n, rtn;
260
261 rtn = 1;
262 c = *s;
263 if(~c&B7) { /* 0xxxxxxx */
264 *u = c;
265 return rtn;
266 } else if((c&(B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */
267 *u = c&(B4|B3|B2|B1|B0);
268 n = 1;
269 } else if((c&(B7|B6|B5|B4)) == (B7|B6|B5)) { /* 1110xxxx */
270 *u = c&(B3|B2|B1|B0);
271 n = 2;
272 } else if((c&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) { /* 11110xxx */
273 *u = c&(B2|B1|B0);
274 n = 3;
275 } else
276 goto invalid;
277 for(i=n,++s; i>0; --i,++rtn,++s) {
278 c = *s;
279 if((c&(B7|B6)) != B7) /* 10xxxxxx */
280 goto invalid;
281 *u <<= 6;
282 *u |= c&(B5|B4|B3|B2|B1|B0);
283 }
284 if((n == 1 && *u < 0x80) ||
285 (n == 2 && *u < 0x800) ||
286 (n == 3 && *u < 0x10000) ||
287 (*u >= 0xD800 && *u <= 0xDFFF))
288 goto invalid;
289 return rtn;
290 invalid:
291 *u = 0xFFFD;
292 return rtn;
293 }
294
295 int
296 utf8encode(long *u, char *s) {
297 unsigned char *sp;
298 unsigned long uc;
299 int i, n;
300
301 sp = (unsigned char*) s;
302 uc = *u;
303 if(uc < 0x80) {
304 *sp = uc; /* 0xxxxxxx */
305 return 1;
306 } else if(*u < 0x800) {
307 *sp = (uc >> 6) | (B7|B6); /* 110xxxxx */
308 n = 1;
309 } else if(uc < 0x10000) {
310 *sp = (uc >> 12) | (B7|B6|B5); /* 1110xxxx */
311 n = 2;
312 } else if(uc <= 0x10FFFF) {
313 *sp = (uc >> 18) | (B7|B6|B5|B4); /* 11110xxx */
314 n = 3;
315 } else {
316 goto invalid;
317 }
318 for(i=n,++sp; i>0; --i,++sp)
319 *sp = ((uc >> 6*(i-1)) & (B5|B4|B3|B2|B1|B0)) | B7; /* 10xxxxxx */
320 return n+1;
321 invalid:
322 /* U+FFFD */
323 *s++ = '\xEF';
324 *s++ = '\xBF';
325 *s = '\xBD';
326 return 3;
327 }
328
329 /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
330 UTF-8 otherwise return 0 */
331 int
332 isfullutf8(char *s, int b) {
333 unsigned char *c1, *c2, *c3;
334
335 c1 = (unsigned char *) s;
336 c2 = (unsigned char *) ++s;
337 c3 = (unsigned char *) ++s;
338 if(b < 1)
339 return 0;
340 else if((*c1&(B7|B6|B5)) == (B7|B6) && b == 1)
341 return 0;
342 else if((*c1&(B7|B6|B5|B4)) == (B7|B6|B5) &&
343 ((b == 1) ||
344 ((b == 2) && (*c2&(B7|B6)) == B7)))
345 return 0;
346 else if((*c1&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4) &&
347 ((b == 1) ||
348 ((b == 2) && (*c2&(B7|B6)) == B7) ||
349 ((b == 3) && (*c2&(B7|B6)) == B7 && (*c3&(B7|B6)) == B7)))
350 return 0;
351 else
352 return 1;
353 }
354
355 int
356 utf8size(char *s) {
357 unsigned char c = *s;
358
359 if (~c&B7)
360 return 1;
361 else if ((c&(B7|B6|B5)) == (B7|B6))
362 return 2;
363 else if ((c&(B7|B6|B5|B4)) == (B7|B6|B5))
364 return 3;
365 else
366 return 4;
367 }
368
369 void
370 selinit(void) {
371 sel.mode = 0;
372 sel.bx = -1;
373 sel.clip = NULL;
374 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
375 if(sel.xtarget == None)
376 sel.xtarget = XA_STRING;
377 }
378
379 static inline int
380 selected(int x, int y) {
381 if(sel.ey == y && sel.by == y) {
382 int bx = MIN(sel.bx, sel.ex);
383 int ex = MAX(sel.bx, sel.ex);
384 return BETWEEN(x, bx, ex);
385 }
386 return ((sel.b.y < y&&y < sel.e.y) || (y==sel.e.y && x<=sel.e.x))
387 || (y==sel.b.y && x>=sel.b.x && (x<=sel.e.x || sel.b.y!=sel.e.y));
388 }
389
390 void
391 getbuttoninfo(XEvent *e, int *b, int *x, int *y) {
392 if(b)
393 *b = e->xbutton.button;
394
395 *x = e->xbutton.x/xw.cw;
396 *y = e->xbutton.y/xw.ch;
397 sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
398 sel.b.y = MIN(sel.by, sel.ey);
399 sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
400 sel.e.y = MAX(sel.by, sel.ey);
401 }
402
403 void
404 bpress(XEvent *e) {
405 sel.mode = 1;
406 sel.ex = sel.bx = e->xbutton.x/xw.cw;
407 sel.ey = sel.by = e->xbutton.y/xw.ch;
408 }
409
410 void
411 selcopy(void) {
412 char *str, *ptr;
413 int x, y, sz, sl, ls = 0;
414
415 if(sel.bx == -1)
416 str = NULL;
417 else {
418 sz = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
419 ptr = str = malloc(sz);
420 for(y = 0; y < term.row; y++) {
421 for(x = 0; x < term.col; x++)
422 if(term.line[y][x].state & GLYPH_SET && (ls = selected(x, y))) {
423 sl = utf8size(term.line[y][x].c);
424 memcpy(ptr, term.line[y][x].c, sl);
425 ptr += sl;
426 }
427 if(ls && y < sel.e.y)
428 *ptr++ = '\n';
429 }
430 *ptr = 0;
431 }
432 xsetsel(str);
433 }
434
435 void
436 selnotify(XEvent *e) {
437 unsigned long nitems;
438 unsigned long ofs, rem;
439 int format;
440 unsigned char *data;
441 Atom type;
442
443 ofs = 0;
444 do {
445 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
446 False, AnyPropertyType, &type, &format,
447 &nitems, &rem, &data)) {
448 fprintf(stderr, "Clipboard allocation failed\n");
449 return;
450 }
451 ttywrite((const char *) data, nitems * format / 8);
452 XFree(data);
453 /* number of 32-bit chunks returned */
454 ofs += nitems * format / 32;
455 } while(rem > 0);
456 }
457
458 void
459 selpaste() {
460 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY, xw.win, CurrentTime);
461 }
462
463 void
464 selrequest(XEvent *e) {
465 XSelectionRequestEvent *xsre;
466 XSelectionEvent xev;
467 Atom xa_targets;
468
469 xsre = (XSelectionRequestEvent *) e;
470 xev.type = SelectionNotify;
471 xev.requestor = xsre->requestor;
472 xev.selection = xsre->selection;
473 xev.target = xsre->target;
474 xev.time = xsre->time;
475 /* reject */
476 xev.property = None;
477
478 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
479 if(xsre->target == xa_targets) {
480 /* respond with the supported type */
481 Atom string = sel.xtarget;
482 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
483 XA_ATOM, 32, PropModeReplace,
484 (unsigned char *) &string, 1);
485 xev.property = xsre->property;
486 } else if(xsre->target == XA_STRING) {
487 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
488 xsre->target, 8, PropModeReplace,
489 (unsigned char *) sel.clip, strlen(sel.clip));
490 xev.property = xsre->property;
491 }
492
493 /* all done, send a notification to the listener */
494 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
495 fprintf(stderr, "Error sending SelectionNotify event\n");
496 }
497
498 void
499 xsetsel(char *str) {
500 /* register the selection for both the clipboard and the primary */
501 Atom clipboard;
502
503 free(sel.clip);
504 sel.clip = str;
505
506 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
507
508 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
509 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
510
511 XFlush(xw.dpy);
512 }
513
514 /* TODO: doubleclick to select word */
515 void
516 brelease(XEvent *e) {
517 int b;
518 sel.mode = 0;
519 getbuttoninfo(e, &b, &sel.ex, &sel.ey);
520 if(sel.bx==sel.ex && sel.by==sel.ey) {
521 sel.bx = -1;
522 if(b==2)
523 selpaste();
524 } else {
525 if(b==1)
526 selcopy();
527 }
528 draw(1);
529 }
530
531 void
532 bmotion(XEvent *e) {
533 if (sel.mode) {
534 getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
535 /* XXX: draw() can't keep up, disabled for now.
536 selection is visible on button release.
537 draw(1); */
538 }
539 }
540
541 void
542 die(const char *errstr, ...) {
543 va_list ap;
544
545 va_start(ap, errstr);
546 vfprintf(stderr, errstr, ap);
547 va_end(ap);
548 exit(EXIT_FAILURE);
549 }
550
551 void
552 execsh(void) {
553 char **args;
554 char *envshell = getenv("SHELL");
555
556 DEFAULT(envshell, "sh");
557 putenv("TERM="TNAME);
558 args = opt_cmd ? opt_cmd : (char*[]){envshell, "-i", NULL};
559 execvp(args[0], args);
560 exit(EXIT_FAILURE);
561 }
562
563 void
564 sigchld(int a) {
565 int stat = 0;
566 if(waitpid(pid, &stat, 0) < 0)
567 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
568 if(WIFEXITED(stat))
569 exit(WEXITSTATUS(stat));
570 else
571 exit(EXIT_FAILURE);
572 }
573
574 void
575 ttynew(void) {
576 int m, s;
577
578 /* seems to work fine on linux, openbsd and freebsd */
579 struct winsize w = {term.row, term.col, 0, 0};
580 if(openpty(&m, &s, NULL, NULL, &w) < 0)
581 die("openpty failed: %s\n", SERRNO);
582
583 switch(pid = fork()) {
584 case -1:
585 die("fork failed\n");
586 break;
587 case 0:
588 setsid(); /* create a new process group */
589 dup2(s, STDIN_FILENO);
590 dup2(s, STDOUT_FILENO);
591 dup2(s, STDERR_FILENO);
592 if(ioctl(s, TIOCSCTTY, NULL) < 0)
593 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
594 close(s);
595 close(m);
596 execsh();
597 break;
598 default:
599 close(s);
600 cmdfd = m;
601 signal(SIGCHLD, sigchld);
602 }
603 }
604
605 void
606 dump(char c) {
607 static int col;
608 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
609 if(++col % 10 == 0)
610 fprintf(stderr, "\n");
611 }
612
613 void
614 ttyread(void) {
615 static char buf[BUFSIZ];
616 static int buflen = 0;
617 char *ptr;
618 char s[UTF_SIZ];
619 int charsize; /* size of utf8 char in bytes */
620 long utf8c;
621 int ret;
622
623 /* append read bytes to unprocessed bytes */
624 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
625 die("Couldn't read from shell: %s\n", SERRNO);
626
627 /* process every complete utf8 char */
628 buflen += ret;
629 ptr = buf;
630 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
631 charsize = utf8decode(ptr, &utf8c);
632 utf8encode(&utf8c, s);
633 tputc(s);
634 ptr += charsize;
635 buflen -= charsize;
636 }
637
638 /* keep any uncomplete utf8 char for the next call */
639 memmove(buf, ptr, buflen);
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 fprintf(stderr, "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.dpy, 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 fprintf(stderr, "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.dpy, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dpy, xw.scr));
1377 XCopyArea(xw.dpy, xw.buf, newbuf, dc.gc, 0, 0, xw.bufw, xw.bufh, 0, 0);
1378 XFreePixmap(xw.dpy, xw.buf);
1379 XSetForeground(xw.dpy, dc.gc, dc.col[DefaultBG]);
1380 if(xw.bufw > oldw)
1381 XFillRectangle(xw.dpy, 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.dpy, 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.dpy, 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.dpy, 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.dpy, xw.scr);
1402
1403 for(i = 0; i < 16; i++) {
1404 if (!XAllocNamedColor(xw.dpy, 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.dpy, 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.dpy, 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.dpy, dc.gc, dc.col[DefaultBG]);
1439 XFillRectangle(xw.dpy, 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.dpy, xw.win, NULL, NULL, NULL, 0, &size, &wm, &class);
1459 }
1460
1461 XFontSet
1462 xinitfont(char *fontstr)
1463 {
1464 XFontSet set;
1465 char *def, **missing;
1466 int n;
1467
1468 missing = NULL;
1469 set = XCreateFontSet(xw.dpy, fontstr, &missing, &n, &def);
1470 if(missing) {
1471 while(n--)
1472 fprintf(stderr, "st: missing fontset: %s\n", missing[n]);
1473 XFreeStringList(missing);
1474 }
1475 return set;
1476 }
1477
1478 void
1479 xgetfontinfo(XFontSet set, int *ascent, int *descent, short *lbearing, short *rbearing)
1480 {
1481 XFontStruct **xfonts;
1482 char **font_names;
1483 int i, n;
1484
1485 *ascent = *descent = *lbearing = *rbearing = 0;
1486 n = XFontsOfFontSet(set, &xfonts, &font_names);
1487 for(i = 0; i < n; i++) {
1488 *ascent = MAX(*ascent, (*xfonts)->ascent);
1489 *descent = MAX(*descent, (*xfonts)->descent);
1490 *lbearing = MAX(*lbearing, (*xfonts)->min_bounds.lbearing);
1491 *rbearing = MAX(*rbearing, (*xfonts)->max_bounds.rbearing);
1492 xfonts++;
1493 }
1494 }
1495
1496 void
1497 initfonts(char *fontstr, char *bfontstr)
1498 {
1499 if((dc.font.set = xinitfont(fontstr)) == NULL ||
1500 (dc.bfont.set = xinitfont(bfontstr)) == NULL)
1501 die("Can't load font %s\n", dc.font.set ? BOLDFONT : FONT);
1502 xgetfontinfo(dc.font.set, &dc.font.ascent, &dc.font.descent,
1503 &dc.font.lbearing, &dc.font.rbearing);
1504 xgetfontinfo(dc.bfont.set, &dc.bfont.ascent, &dc.bfont.descent,
1505 &dc.bfont.lbearing, &dc.bfont.rbearing);
1506 }
1507
1508 void
1509 xinit(void) {
1510 XSetWindowAttributes attrs;
1511 Cursor cursor;
1512
1513 if(!(xw.dpy = XOpenDisplay(NULL)))
1514 die("Can't open display\n");
1515 xw.scr = XDefaultScreen(xw.dpy);
1516
1517 /* font */
1518 initfonts(FONT, BOLDFONT);
1519
1520 /* XXX: Assuming same size for bold font */
1521 xw.cw = dc.font.rbearing - dc.font.lbearing;
1522 xw.ch = dc.font.ascent + dc.font.descent;
1523
1524 /* colors */
1525 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
1526 xloadcols();
1527
1528 /* window - default size */
1529 xw.bufh = 24 * xw.ch;
1530 xw.bufw = 80 * xw.cw;
1531 xw.h = xw.bufh + 2*BORDER;
1532 xw.w = xw.bufw + 2*BORDER;
1533
1534 attrs.background_pixel = dc.col[DefaultBG];
1535 attrs.border_pixel = dc.col[DefaultBG];
1536 attrs.bit_gravity = NorthWestGravity;
1537 attrs.event_mask = FocusChangeMask | KeyPressMask
1538 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
1539 | PointerMotionMask | ButtonPressMask | ButtonReleaseMask;
1540 attrs.colormap = xw.cmap;
1541
1542 xw.win = XCreateWindow(xw.dpy, XRootWindow(xw.dpy, xw.scr), 0, 0,
1543 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
1544 XDefaultVisual(xw.dpy, xw.scr),
1545 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
1546 | CWColormap,
1547 &attrs);
1548 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dpy, xw.scr));
1549
1550
1551 /* input methods */
1552 xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL);
1553 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
1554 | XIMStatusNothing, XNClientWindow, xw.win,
1555 XNFocusWindow, xw.win, NULL);
1556 /* gc */
1557 dc.gc = XCreateGC(xw.dpy, xw.win, 0, NULL);
1558
1559 /* white cursor, black outline */
1560 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
1561 XDefineCursor(xw.dpy, xw.win, cursor);
1562 XRecolorCursor(xw.dpy, cursor,
1563 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
1564 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
1565
1566 XMapWindow(xw.dpy, xw.win);
1567 xhints();
1568 XStoreName(xw.dpy, xw.win, opt_title ? opt_title : "st");
1569 XSync(xw.dpy, 0);
1570 }
1571
1572 void
1573 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
1574 unsigned long xfg, xbg;
1575 int winx = x*xw.cw, winy = y*xw.ch + dc.font.ascent, width = charlen*xw.cw;
1576 int i;
1577
1578 if(base.mode & ATTR_REVERSE)
1579 xfg = dc.col[base.bg], xbg = dc.col[base.fg];
1580 else
1581 xfg = dc.col[base.fg], xbg = dc.col[base.bg];
1582
1583 XSetBackground(xw.dpy, dc.gc, xbg);
1584 XSetForeground(xw.dpy, dc.gc, xfg);
1585
1586 if(base.mode & ATTR_GFX) {
1587 for(i = 0; i < bytelen; i++) {
1588 char c = gfx[(unsigned int)s[i] % 256];
1589 if(c)
1590 s[i] = c;
1591 else if(s[i] > 0x5f)
1592 s[i] -= 0x5f;
1593 }
1594 }
1595
1596 XmbDrawImageString(xw.dpy, xw.buf, base.mode & ATTR_BOLD ? dc.bfont.set : dc.font.set,
1597 dc.gc, winx, winy, s, bytelen);
1598
1599 if(base.mode & ATTR_UNDERLINE)
1600 XDrawLine(xw.dpy, xw.buf, dc.gc, winx, winy+1, winx+width-1, winy+1);
1601 }
1602
1603 void
1604 xdrawcursor(void) {
1605 static int oldx = 0;
1606 static int oldy = 0;
1607 int sl;
1608 Glyph g = {{' '}, ATTR_NULL, DefaultBG, DefaultCS, 0};
1609
1610 LIMIT(oldx, 0, term.col-1);
1611 LIMIT(oldy, 0, term.row-1);
1612
1613 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
1614 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
1615
1616 /* remove the old cursor */
1617 if(term.line[oldy][oldx].state & GLYPH_SET) {
1618 sl = utf8size(term.line[oldy][oldx].c);
1619 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx, oldy, 1, sl);
1620 } else
1621 xclear(oldx, oldy, oldx, oldy);
1622
1623 /* draw the new one */
1624 if(!(term.c.state & CURSOR_HIDE) && (xw.state & WIN_FOCUSED)) {
1625 sl = utf8size(g.c);
1626 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
1627 oldx = term.c.x, oldy = term.c.y;
1628 }
1629 }
1630
1631 #ifdef DEBUG
1632 /* basic drawing routines */
1633 void
1634 xdrawc(int x, int y, Glyph g) {
1635 int sl = utf8size(g.c);
1636 XRectangle r = { x * xw.cw, y * xw.ch, xw.cw, xw.ch };
1637 XSetBackground(xw.dpy, dc.gc, dc.col[g.bg]);
1638 XSetForeground(xw.dpy, dc.gc, dc.col[g.fg]);
1639 XmbDrawImageString(xw.dpy, xw.buf, g.mode&ATTR_BOLD?dc.bfont.fs:dc.font.fs,
1640 dc.gc, r.x, r.y+dc.font.ascent, g.c, sl);
1641 }
1642
1643 void
1644 draw(int dummy) {
1645 int x, y;
1646
1647 xclear(0, 0, term.col-1, term.row-1);
1648 for(y = 0; y < term.row; y++)
1649 for(x = 0; x < term.col; x++)
1650 if(term.line[y][x].state & GLYPH_SET)
1651 xdrawc(x, y, term.line[y][x]);
1652
1653 xdrawcursor();
1654 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.bufw, xw.bufh, BORDER, BORDER);
1655 XFlush(xw.dpy);
1656 }
1657
1658 #else
1659 /* optimized drawing routine */
1660 void
1661 draw(int redraw_all) {
1662 int ic, ib, x, y, ox, sl;
1663 Glyph base, new;
1664 char buf[DRAW_BUF_SIZ];
1665
1666 if(!(xw.state & WIN_VISIBLE))
1667 return;
1668
1669 xclear(0, 0, term.col-1, term.row-1);
1670 for(y = 0; y < term.row; y++) {
1671 base = term.line[y][0];
1672 ic = ib = ox = 0;
1673 for(x = 0; x < term.col; x++) {
1674 new = term.line[y][x];
1675 if(sel.bx!=-1 && *(new.c) && selected(x, y))
1676 new.mode ^= ATTR_REVERSE;
1677 if(ib > 0 && (!(new.state & GLYPH_SET) || ATTRCMP(base, new) ||
1678 ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
1679 xdraws(buf, base, ox, y, ic, ib);
1680 ic = ib = 0;
1681 }
1682 if(new.state & GLYPH_SET) {
1683 if(ib == 0) {
1684 ox = x;
1685 base = new;
1686 }
1687 sl = utf8size(new.c);
1688 memcpy(buf+ib, new.c, sl);
1689 ib += sl;
1690 ++ic;
1691 }
1692 }
1693 if(ib > 0)
1694 xdraws(buf, base, ox, y, ic, ib);
1695 }
1696 xdrawcursor();
1697 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.bufw, xw.bufh, BORDER, BORDER);
1698 }
1699
1700 #endif
1701
1702 void
1703 expose(XEvent *ev) {
1704 XExposeEvent *e = &ev->xexpose;
1705 if(xw.state & WIN_REDRAW) {
1706 if(!e->count) {
1707 xw.state &= ~WIN_REDRAW;
1708 draw(SCREEN_REDRAW);
1709 }
1710 } else
1711 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, e->x-BORDER, e->y-BORDER,
1712 e->width, e->height, e->x, e->y);
1713 }
1714
1715 void
1716 visibility(XEvent *ev) {
1717 XVisibilityEvent *e = &ev->xvisibility;
1718 if(e->state == VisibilityFullyObscured)
1719 xw.state &= ~WIN_VISIBLE;
1720 else if(!(xw.state & WIN_VISIBLE))
1721 /* need a full redraw for next Expose, not just a buf copy */
1722 xw.state |= WIN_VISIBLE | WIN_REDRAW;
1723 }
1724
1725 void
1726 unmap(XEvent *ev) {
1727 xw.state &= ~WIN_VISIBLE;
1728 }
1729
1730 void
1731 xseturgency(int add) {
1732 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
1733 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
1734 XSetWMHints(xw.dpy, xw.win, h);
1735 XFree(h);
1736 }
1737
1738 void
1739 focus(XEvent *ev) {
1740 if(ev->type == FocusIn) {
1741 xw.state |= WIN_FOCUSED;
1742 xseturgency(0);
1743 } else
1744 xw.state &= ~WIN_FOCUSED;
1745 draw(SCREEN_UPDATE);
1746 }
1747
1748 char*
1749 kmap(KeySym k) {
1750 int i;
1751 for(i = 0; i < LEN(key); i++)
1752 if(key[i].k == k)
1753 return (char*)key[i].s;
1754 return NULL;
1755 }
1756
1757 void
1758 kpress(XEvent *ev) {
1759 XKeyEvent *e = &ev->xkey;
1760 KeySym ksym;
1761 char buf[32];
1762 char *customkey;
1763 int len;
1764 int meta;
1765 int shift;
1766 Status status;
1767
1768 meta = e->state & Mod1Mask;
1769 shift = e->state & ShiftMask;
1770 len = XmbLookupString(xw.xic, e, buf, sizeof(buf), &ksym, &status);
1771
1772 /* 1. custom keys from config.h */
1773 if((customkey = kmap(ksym)))
1774 ttywrite(customkey, strlen(customkey));
1775 /* 2. hardcoded (overrides X lookup) */
1776 else
1777 switch(ksym) {
1778 case XK_Up:
1779 case XK_Down:
1780 case XK_Left:
1781 case XK_Right:
1782 sprintf(buf, "\033%c%c", IS_SET(MODE_APPKEYPAD) ? 'O' : '[', "DACB"[ksym - XK_Left]);
1783 ttywrite(buf, 3);
1784 break;
1785 case XK_Insert:
1786 if(shift)
1787 selpaste();
1788 break;
1789 case XK_Return:
1790 if(IS_SET(MODE_CRLF))
1791 ttywrite("\r\n", 2);
1792 else
1793 ttywrite("\r", 1);
1794 break;
1795 /* 3. X lookup */
1796 default:
1797 if(len > 0) {
1798 if(meta && len == 1)
1799 ttywrite("\033", 1);
1800 ttywrite(buf, len);
1801 }
1802 break;
1803 }
1804 }
1805
1806 void
1807 resize(XEvent *e) {
1808 int col, row;
1809
1810 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
1811 return;
1812
1813 xw.w = e->xconfigure.width;
1814 xw.h = e->xconfigure.height;
1815 col = (xw.w - 2*BORDER) / xw.cw;
1816 row = (xw.h - 2*BORDER) / xw.ch;
1817 if(col == term.col && row == term.row)
1818 return;
1819 if(tresize(col, row))
1820 draw(SCREEN_REDRAW);
1821 ttyresize(col, row);
1822 xresize(col, row);
1823 }
1824
1825 void
1826 run(void) {
1827 XEvent ev;
1828 fd_set rfd;
1829 int xfd = XConnectionNumber(xw.dpy);
1830
1831 for(;;) {
1832 FD_ZERO(&rfd);
1833 FD_SET(cmdfd, &rfd);
1834 FD_SET(xfd, &rfd);
1835 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, NULL) < 0) {
1836 if(errno == EINTR)
1837 continue;
1838 die("select failed: %s\n", SERRNO);
1839 }
1840 if(FD_ISSET(cmdfd, &rfd)) {
1841 ttyread();
1842 draw(SCREEN_UPDATE);
1843 }
1844 while(XPending(xw.dpy)) {
1845 XNextEvent(xw.dpy, &ev);
1846 if (XFilterEvent(&ev, xw.win))
1847 continue;
1848 if(handler[ev.type])
1849 (handler[ev.type])(&ev);
1850 }
1851 }
1852 }
1853
1854 int
1855 main(int argc, char *argv[]) {
1856 int i;
1857
1858 for(i = 1; i < argc; i++) {
1859 switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
1860 case 't':
1861 if(++i < argc) opt_title = argv[i];
1862 break;
1863 case 'c':
1864 if(++i < argc) opt_class = argv[i];
1865 break;
1866 case 'e':
1867 if(++i < argc) opt_cmd = &argv[i];
1868 break;
1869 case 'v':
1870 default:
1871 die(USAGE);
1872 }
1873 /* -e eats every remaining arguments */
1874 if(opt_cmd)
1875 break;
1876 }
1877 setlocale(LC_CTYPE, "");
1878 tnew(80, 24);
1879 ttynew();
1880 xinit();
1881 selinit();
1882 run();
1883 return 0;
1884 }