Xinqi Bao's Git

projects / st.git / blob


e1934435b6f8aada31ffaed553da12d9c02a2966
[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 #include <sys/time.h>
26 #include <time.h>
27
28 #if defined(__linux)
29 #include <pty.h>
30 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
31 #include <util.h>
32 #elif defined(__FreeBSD__) || defined(__DragonFly__)
33 #include <libutil.h>
34 #endif
35
36 #define USAGE \
37 "st " VERSION " (c) 2010-2011 st engineers\n" \
38 "usage: st [-t title] [-c class] [-w windowid] [-v] [-e command...]\n"
39
40 /* XEMBED messages */
41 #define XEMBED_FOCUS_IN 4
42 #define XEMBED_FOCUS_OUT 5
43
44 /* Arbitrary sizes */
45 #define ESC_TITLE_SIZ 256
46 #define ESC_BUF_SIZ 256
47 #define ESC_ARG_SIZ 16
48 #define DRAW_BUF_SIZ 1024
49 #define UTF_SIZ 4
50 #define XK_NO_MOD UINT_MAX
51 #define XK_ANY_MOD 0
52
53 #define SERRNO strerror(errno)
54 #define MIN(a, b) ((a) < (b) ? (a) : (b))
55 #define MAX(a, b) ((a) < (b) ? (b) : (a))
56 #define LEN(a) (sizeof(a) / sizeof(a[0]))
57 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
58 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
59 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
60 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
61 #define IS_SET(flag) (term.mode & (flag))
62 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_usec-t2.tv_usec)/1000)
63 #define X2COL(x) (((x) - BORDER)/xw.cw)
64 #define Y2ROW(y) (((y) - BORDER)/xw.ch)
65
66 /* Attribute, Cursor, Character state, Terminal mode, Screen draw mode */
67 enum { ATTR_NULL=0 , ATTR_REVERSE=1 , ATTR_UNDERLINE=2, ATTR_BOLD=4, ATTR_GFX=8 };
68 enum { CURSOR_UP, CURSOR_DOWN, CURSOR_LEFT, CURSOR_RIGHT,
69 CURSOR_SAVE, CURSOR_LOAD };
70 enum { CURSOR_DEFAULT = 0, CURSOR_HIDE = 1, CURSOR_WRAPNEXT = 2 };
71 enum { GLYPH_SET=1, GLYPH_DIRTY=2 };
72 enum { MODE_WRAP=1, MODE_INSERT=2, MODE_APPKEYPAD=4, MODE_ALTSCREEN=8,
73 MODE_CRLF=16, MODE_MOUSEBTN=32, MODE_MOUSEMOTION=64, MODE_MOUSE=32|64, MODE_REVERSE=128 };
74 enum { ESC_START=1, ESC_CSI=2, ESC_OSC=4, ESC_TITLE=8, ESC_ALTCHARSET=16 };
75 enum { WIN_VISIBLE=1, WIN_REDRAW=2, WIN_FOCUSED=4 };
76
77 #undef B0
78 enum { B0=1, B1=2, B2=4, B3=8, B4=16, B5=32, B6=64, B7=128 };
79
80 typedef struct {
81 char c[UTF_SIZ]; /* character code */
82 char mode; /* attribute flags */
83 int fg; /* foreground */
84 int bg; /* background */
85 char state; /* state flags */
86 } Glyph;
87
88 typedef Glyph* Line;
89
90 typedef struct {
91 Glyph attr; /* current char attributes */
92 int x;
93 int y;
94 char state;
95 } TCursor;
96
97 /* CSI Escape sequence structs */
98 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
99 typedef struct {
100 char buf[ESC_BUF_SIZ]; /* raw string */
101 int len; /* raw string length */
102 char priv;
103 int arg[ESC_ARG_SIZ];
104 int narg; /* nb of args */
105 char mode;
106 } CSIEscape;
107
108 /* Internal representation of the screen */
109 typedef struct {
110 int row; /* nb row */
111 int col; /* nb col */
112 Line* line; /* screen */
113 Line* alt; /* alternate screen */
114 char* dirty; /* dirtyness of lines */
115 TCursor c; /* cursor */
116 int top; /* top scroll limit */
117 int bot; /* bottom scroll limit */
118 int mode; /* terminal mode flags */
119 int esc; /* escape state flags */
120 char title[ESC_TITLE_SIZ];
121 int titlelen;
122 } Term;
123
124 /* Purely graphic info */
125 typedef struct {
126 Display* dpy;
127 Colormap cmap;
128 Window win;
129 Pixmap buf;
130 Atom xembed;
131 XIM xim;
132 XIC xic;
133 int scr;
134 int w; /* window width */
135 int h; /* window height */
136 int bufw; /* pixmap width */
137 int bufh; /* pixmap height */
138 int ch; /* char height */
139 int cw; /* char width */
140 char state; /* focus, redraw, visible */
141 } XWindow;
142
143 typedef struct {
144 KeySym k;
145 unsigned int mask;
146 char s[ESC_BUF_SIZ];
147 } Key;
148
149 /* Drawing Context */
150 typedef struct {
151 unsigned long col[256];
152 GC gc;
153 struct {
154 int ascent;
155 int descent;
156 short lbearing;
157 short rbearing;
158 XFontSet set;
159 } font, bfont;
160 } DC;
161
162 /* TODO: use better name for vars... */
163 typedef struct {
164 int mode;
165 int bx, by;
166 int ex, ey;
167 struct {int x, y;} b, e;
168 char *clip;
169 Atom xtarget;
170 struct timeval tclick1;
171 struct timeval tclick2;
172 } Selection;
173
174 #include "config.h"
175
176 static void die(const char*, ...);
177 static void draw(void);
178 static void drawregion(int, int, int, int);
179 static void execsh(void);
180 static void sigchld(int);
181 static void run(void);
182
183 static void csidump(void);
184 static void csihandle(void);
185 static void csiparse(void);
186 static void csireset(void);
187
188 static void tclearregion(int, int, int, int);
189 static void tcursor(int);
190 static void tdeletechar(int);
191 static void tdeleteline(int);
192 static void tinsertblank(int);
193 static void tinsertblankline(int);
194 static void tmoveto(int, int);
195 static void tnew(int, int);
196 static void tnewline(int);
197 static void tputtab(void);
198 static void tputc(char*);
199 static void treset(void);
200 static int tresize(int, int);
201 static void tscrollup(int, int);
202 static void tscrolldown(int, int);
203 static void tsetattr(int*, int);
204 static void tsetchar(char*);
205 static void tsetscroll(int, int);
206 static void tswapscreen(void);
207 static void tfulldirt(void);
208
209 static void ttynew(void);
210 static void ttyread(void);
211 static void ttyresize(int, int);
212 static void ttywrite(const char *, size_t);
213
214 static void xdraws(char *, Glyph, int, int, int, int);
215 static void xhints(void);
216 static void xclear(int, int, int, int);
217 static void xdrawcursor(void);
218 static void xinit(void);
219 static void xloadcols(void);
220 static void xseturgency(int);
221 static void xsetsel(char*);
222 static void xresize(int, int);
223
224 static void expose(XEvent *);
225 static void visibility(XEvent *);
226 static void unmap(XEvent *);
227 static char* kmap(KeySym, unsigned int state);
228 static void kpress(XEvent *);
229 static void cmessage(XEvent *);
230 static void resize(XEvent *);
231 static void focus(XEvent *);
232 static void brelease(XEvent *);
233 static void bpress(XEvent *);
234 static void bmotion(XEvent *);
235 static void selnotify(XEvent *);
236 static void selrequest(XEvent *);
237
238 static void selinit(void);
239 static inline int selected(int, int);
240 static void selcopy(void);
241 static void selpaste();
242 static void selscroll(int, int);
243
244 static int utf8decode(char *, long *);
245 static int utf8encode(long *, char *);
246 static int utf8size(char *);
247 static int isfullutf8(char *, int);
248
249 static void (*handler[LASTEvent])(XEvent *) = {
250 [KeyPress] = kpress,
251 [ClientMessage] = cmessage,
252 [ConfigureNotify] = resize,
253 [VisibilityNotify] = visibility,
254 [UnmapNotify] = unmap,
255 [Expose] = expose,
256 [FocusIn] = focus,
257 [FocusOut] = focus,
258 [MotionNotify] = bmotion,
259 [ButtonPress] = bpress,
260 [ButtonRelease] = brelease,
261 [SelectionNotify] = selnotify,
262 [SelectionRequest] = selrequest,
263 };
264
265 /* Globals */
266 static DC dc;
267 static XWindow xw;
268 static Term term;
269 static CSIEscape escseq;
270 static int cmdfd;
271 static pid_t pid;
272 static Selection sel;
273 static char **opt_cmd = NULL;
274 static char *opt_title = NULL;
275 static char *opt_embed = NULL;
276 static char *opt_class = NULL;
277
278 int
279 utf8decode(char *s, long *u) {
280 unsigned char c;
281 int i, n, rtn;
282
283 rtn = 1;
284 c = *s;
285 if(~c&B7) { /* 0xxxxxxx */
286 *u = c;
287 return rtn;
288 } else if((c&(B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */
289 *u = c&(B4|B3|B2|B1|B0);
290 n = 1;
291 } else if((c&(B7|B6|B5|B4)) == (B7|B6|B5)) { /* 1110xxxx */
292 *u = c&(B3|B2|B1|B0);
293 n = 2;
294 } else if((c&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) { /* 11110xxx */
295 *u = c&(B2|B1|B0);
296 n = 3;
297 } else
298 goto invalid;
299 for(i=n,++s; i>0; --i,++rtn,++s) {
300 c = *s;
301 if((c&(B7|B6)) != B7) /* 10xxxxxx */
302 goto invalid;
303 *u <<= 6;
304 *u |= c&(B5|B4|B3|B2|B1|B0);
305 }
306 if((n == 1 && *u < 0x80) ||
307 (n == 2 && *u < 0x800) ||
308 (n == 3 && *u < 0x10000) ||
309 (*u >= 0xD800 && *u <= 0xDFFF))
310 goto invalid;
311 return rtn;
312 invalid:
313 *u = 0xFFFD;
314 return rtn;
315 }
316
317 int
318 utf8encode(long *u, char *s) {
319 unsigned char *sp;
320 unsigned long uc;
321 int i, n;
322
323 sp = (unsigned char*) s;
324 uc = *u;
325 if(uc < 0x80) {
326 *sp = uc; /* 0xxxxxxx */
327 return 1;
328 } else if(*u < 0x800) {
329 *sp = (uc >> 6) | (B7|B6); /* 110xxxxx */
330 n = 1;
331 } else if(uc < 0x10000) {
332 *sp = (uc >> 12) | (B7|B6|B5); /* 1110xxxx */
333 n = 2;
334 } else if(uc <= 0x10FFFF) {
335 *sp = (uc >> 18) | (B7|B6|B5|B4); /* 11110xxx */
336 n = 3;
337 } else {
338 goto invalid;
339 }
340 for(i=n,++sp; i>0; --i,++sp)
341 *sp = ((uc >> 6*(i-1)) & (B5|B4|B3|B2|B1|B0)) | B7; /* 10xxxxxx */
342 return n+1;
343 invalid:
344 /* U+FFFD */
345 *s++ = '\xEF';
346 *s++ = '\xBF';
347 *s = '\xBD';
348 return 3;
349 }
350
351 /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
352 UTF-8 otherwise return 0 */
353 int
354 isfullutf8(char *s, int b) {
355 unsigned char *c1, *c2, *c3;
356
357 c1 = (unsigned char *) s;
358 c2 = (unsigned char *) ++s;
359 c3 = (unsigned char *) ++s;
360 if(b < 1)
361 return 0;
362 else if((*c1&(B7|B6|B5)) == (B7|B6) && b == 1)
363 return 0;
364 else if((*c1&(B7|B6|B5|B4)) == (B7|B6|B5) &&
365 ((b == 1) ||
366 ((b == 2) && (*c2&(B7|B6)) == B7)))
367 return 0;
368 else if((*c1&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4) &&
369 ((b == 1) ||
370 ((b == 2) && (*c2&(B7|B6)) == B7) ||
371 ((b == 3) && (*c2&(B7|B6)) == B7 && (*c3&(B7|B6)) == B7)))
372 return 0;
373 else
374 return 1;
375 }
376
377 int
378 utf8size(char *s) {
379 unsigned char c = *s;
380
381 if(~c&B7)
382 return 1;
383 else if((c&(B7|B6|B5)) == (B7|B6))
384 return 2;
385 else if((c&(B7|B6|B5|B4)) == (B7|B6|B5))
386 return 3;
387 else
388 return 4;
389 }
390
391 void
392 selinit(void) {
393 sel.tclick1.tv_sec = 0;
394 sel.tclick1.tv_usec = 0;
395 sel.mode = 0;
396 sel.bx = -1;
397 sel.clip = NULL;
398 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
399 if(sel.xtarget == None)
400 sel.xtarget = XA_STRING;
401 }
402
403 static inline int
404 selected(int x, int y) {
405 if(sel.ey == y && sel.by == y) {
406 int bx = MIN(sel.bx, sel.ex);
407 int ex = MAX(sel.bx, sel.ex);
408 return BETWEEN(x, bx, ex);
409 }
410 return ((sel.b.y < y&&y < sel.e.y) || (y==sel.e.y && x<=sel.e.x))
411 || (y==sel.b.y && x>=sel.b.x && (x<=sel.e.x || sel.b.y!=sel.e.y));
412 }
413
414 void
415 getbuttoninfo(XEvent *e, int *b, int *x, int *y) {
416 if(b)
417 *b = e->xbutton.button;
418
419 *x = X2COL(e->xbutton.x);
420 *y = Y2ROW(e->xbutton.y);
421 sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
422 sel.b.y = MIN(sel.by, sel.ey);
423 sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
424 sel.e.y = MAX(sel.by, sel.ey);
425 }
426
427 void
428 mousereport(XEvent *e) {
429 int x = X2COL(e->xbutton.x);
430 int y = Y2ROW(e->xbutton.y);
431 int button = e->xbutton.button;
432 int state = e->xbutton.state;
433 char buf[] = { '\033', '[', 'M', 0, 32+x+1, 32+y+1 };
434 static int ob, ox, oy;
435
436 /* from urxvt */
437 if(e->xbutton.type == MotionNotify) {
438 if(!IS_SET(MODE_MOUSEMOTION) || (x == ox && y == oy))
439 return;
440 button = ob + 32;
441 ox = x, oy = y;
442 } else if(e->xbutton.type == ButtonRelease || button == AnyButton) {
443 button = 3;
444 } else {
445 button -= Button1;
446 if(button >= 3)
447 button += 64 - 3;
448 if(e->xbutton.type == ButtonPress) {
449 ob = button;
450 ox = x, oy = y;
451 }
452 }
453
454 buf[3] = 32 + button + (state & ShiftMask ? 4 : 0)
455 + (state & Mod4Mask ? 8 : 0)
456 + (state & ControlMask ? 16 : 0);
457
458 ttywrite(buf, sizeof(buf));
459 }
460
461 void
462 bpress(XEvent *e) {
463 if(IS_SET(MODE_MOUSE))
464 mousereport(e);
465 else if(e->xbutton.button == Button1) {
466 if(sel.bx != -1)
467 for(int i=sel.b.y; i<=sel.e.y; i++)
468 term.dirty[i] = 1;
469 sel.mode = 1;
470 sel.ex = sel.bx = X2COL(e->xbutton.x);
471 sel.ey = sel.by = Y2ROW(e->xbutton.y);
472 }
473 }
474
475 void
476 selcopy(void) {
477 char *str, *ptr;
478 int x, y, sz, sl, ls = 0;
479
480 if(sel.bx == -1)
481 str = NULL;
482 else {
483 sz = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
484 ptr = str = malloc(sz);
485 for(y = 0; y < term.row; y++) {
486 for(x = 0; x < term.col; x++)
487 if(term.line[y][x].state & GLYPH_SET && (ls = selected(x, y))) {
488 sl = utf8size(term.line[y][x].c);
489 memcpy(ptr, term.line[y][x].c, sl);
490 ptr += sl;
491 }
492 if(ls && y < sel.e.y)
493 *ptr++ = '\n';
494 }
495 *ptr = 0;
496 }
497 xsetsel(str);
498 }
499
500 void
501 selnotify(XEvent *e) {
502 unsigned long nitems, ofs, rem;
503 int format;
504 unsigned char *data;
505 Atom type;
506
507 ofs = 0;
508 do {
509 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
510 False, AnyPropertyType, &type, &format,
511 &nitems, &rem, &data)) {
512 fprintf(stderr, "Clipboard allocation failed\n");
513 return;
514 }
515 ttywrite((const char *) data, nitems * format / 8);
516 XFree(data);
517 /* number of 32-bit chunks returned */
518 ofs += nitems * format / 32;
519 } while(rem > 0);
520 }
521
522 void
523 selpaste() {
524 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY, xw.win, CurrentTime);
525 }
526
527 void
528 selrequest(XEvent *e) {
529 XSelectionRequestEvent *xsre;
530 XSelectionEvent xev;
531 Atom xa_targets;
532
533 xsre = (XSelectionRequestEvent *) e;
534 xev.type = SelectionNotify;
535 xev.requestor = xsre->requestor;
536 xev.selection = xsre->selection;
537 xev.target = xsre->target;
538 xev.time = xsre->time;
539 /* reject */
540 xev.property = None;
541
542 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
543 if(xsre->target == xa_targets) {
544 /* respond with the supported type */
545 Atom string = sel.xtarget;
546 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
547 XA_ATOM, 32, PropModeReplace,
548 (unsigned char *) &string, 1);
549 xev.property = xsre->property;
550 } else if(xsre->target == sel.xtarget) {
551 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
552 xsre->target, 8, PropModeReplace,
553 (unsigned char *) sel.clip, strlen(sel.clip));
554 xev.property = xsre->property;
555 }
556
557 /* all done, send a notification to the listener */
558 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
559 fprintf(stderr, "Error sending SelectionNotify event\n");
560 }
561
562 void
563 xsetsel(char *str) {
564 /* register the selection for both the clipboard and the primary */
565 Atom clipboard;
566
567 free(sel.clip);
568 sel.clip = str;
569
570 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
571
572 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
573 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
574
575 XFlush(xw.dpy);
576 }
577
578 void
579 brelease(XEvent *e) {
580 if(IS_SET(MODE_MOUSE)) {
581 mousereport(e);
582 return;
583 }
584 if(e->xbutton.button == Button2)
585 selpaste();
586 else if(e->xbutton.button == Button1) {
587 sel.mode = 0;
588 getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
589 term.dirty[sel.ey] = 1;
590 if(sel.bx == sel.ex && sel.by == sel.ey) {
591 struct timeval now;
592 sel.bx = -1;
593 gettimeofday(&now, NULL);
594
595 if(TIMEDIFF(now, sel.tclick2) <= TRIPLECLICK_TIMEOUT) {
596 /* triple click on the line */
597 sel.b.x = sel.bx = 0;
598 sel.e.x = sel.ex = term.col;
599 sel.b.y = sel.e.y = sel.ey;
600 selcopy();
601 } else if(TIMEDIFF(now, sel.tclick1) <= DOUBLECLICK_TIMEOUT) {
602 /* double click to select word */
603 sel.bx = sel.ex;
604 while(sel.bx > 0 && term.line[sel.ey][sel.bx-1].state & GLYPH_SET &&
605 term.line[sel.ey][sel.bx-1].c[0] != ' ') sel.bx--;
606 sel.b.x = sel.bx;
607 while(sel.ex < term.col-1 && term.line[sel.ey][sel.ex+1].state & GLYPH_SET &&
608 term.line[sel.ey][sel.ex+1].c[0] != ' ') sel.ex++;
609 sel.e.x = sel.ex;
610 sel.b.y = sel.e.y = sel.ey;
611 selcopy();
612 }
613 } else
614 selcopy();
615 }
616 memcpy(&sel.tclick2, &sel.tclick1, sizeof(struct timeval));
617 gettimeofday(&sel.tclick1, NULL);
618 draw();
619 }
620
621 void
622 bmotion(XEvent *e) {
623 if(IS_SET(MODE_MOUSE)) {
624 mousereport(e);
625 return;
626 }
627 if(sel.mode) {
628 int oldey = sel.ey, oldex = sel.ex;
629 getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
630
631 if(oldey != sel.ey || oldex != sel.ex) {
632 int starty = MIN(oldey, sel.ey);
633 int endy = MAX(oldey, sel.ey);
634 for(int i=starty; i<=endy; i++)
635 term.dirty[i] = 1;
636 draw();
637 }
638 }
639 }
640
641 void
642 die(const char *errstr, ...) {
643 va_list ap;
644
645 va_start(ap, errstr);
646 vfprintf(stderr, errstr, ap);
647 va_end(ap);
648 exit(EXIT_FAILURE);
649 }
650
651 void
652 execsh(void) {
653 char **args;
654 char *envshell = getenv("SHELL");
655
656 DEFAULT(envshell, "sh");
657 putenv("TERM="TNAME);
658 args = opt_cmd ? opt_cmd : (char*[]){envshell, "-i", NULL};
659 execvp(args[0], args);
660 exit(EXIT_FAILURE);
661 }
662
663 void
664 sigchld(int a) {
665 int stat = 0;
666 if(waitpid(pid, &stat, 0) < 0)
667 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
668 if(WIFEXITED(stat))
669 exit(WEXITSTATUS(stat));
670 else
671 exit(EXIT_FAILURE);
672 }
673
674 void
675 ttynew(void) {
676 int m, s;
677
678 /* seems to work fine on linux, openbsd and freebsd */
679 struct winsize w = {term.row, term.col, 0, 0};
680 if(openpty(&m, &s, NULL, NULL, &w) < 0)
681 die("openpty failed: %s\n", SERRNO);
682
683 switch(pid = fork()) {
684 case -1:
685 die("fork failed\n");
686 break;
687 case 0:
688 setsid(); /* create a new process group */
689 dup2(s, STDIN_FILENO);
690 dup2(s, STDOUT_FILENO);
691 dup2(s, STDERR_FILENO);
692 if(ioctl(s, TIOCSCTTY, NULL) < 0)
693 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
694 close(s);
695 close(m);
696 execsh();
697 break;
698 default:
699 close(s);
700 cmdfd = m;
701 signal(SIGCHLD, sigchld);
702 }
703 }
704
705 void
706 dump(char c) {
707 static int col;
708 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
709 if(++col % 10 == 0)
710 fprintf(stderr, "\n");
711 }
712
713 void
714 ttyread(void) {
715 static char buf[BUFSIZ];
716 static int buflen = 0;
717 char *ptr;
718 char s[UTF_SIZ];
719 int charsize; /* size of utf8 char in bytes */
720 long utf8c;
721 int ret;
722
723 /* append read bytes to unprocessed bytes */
724 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
725 die("Couldn't read from shell: %s\n", SERRNO);
726
727 /* process every complete utf8 char */
728 buflen += ret;
729 ptr = buf;
730 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
731 charsize = utf8decode(ptr, &utf8c);
732 utf8encode(&utf8c, s);
733 tputc(s);
734 ptr += charsize;
735 buflen -= charsize;
736 }
737
738 /* keep any uncomplete utf8 char for the next call */
739 memmove(buf, ptr, buflen);
740 }
741
742 void
743 ttywrite(const char *s, size_t n) {
744 if(write(cmdfd, s, n) == -1)
745 die("write error on tty: %s\n", SERRNO);
746 }
747
748 void
749 ttyresize(int x, int y) {
750 struct winsize w;
751
752 w.ws_row = term.row;
753 w.ws_col = term.col;
754 w.ws_xpixel = w.ws_ypixel = 0;
755 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
756 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
757 }
758
759 void
760 tfulldirt(void)
761 {
762 int i;
763 for(i = 0; i < term.row; i++)
764 term.dirty[i] = 1;
765 }
766
767 void
768 tcursor(int mode) {
769 static TCursor c;
770
771 if(mode == CURSOR_SAVE)
772 c = term.c;
773 else if(mode == CURSOR_LOAD)
774 term.c = c, tmoveto(c.x, c.y);
775 }
776
777 void
778 treset(void) {
779 term.c = (TCursor){{
780 .mode = ATTR_NULL,
781 .fg = DefaultFG,
782 .bg = DefaultBG
783 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
784
785 term.top = 0, term.bot = term.row - 1;
786 term.mode = MODE_WRAP;
787 tclearregion(0, 0, term.col-1, term.row-1);
788 }
789
790 void
791 tnew(int col, int row) {
792 /* set screen size */
793 term.row = row, term.col = col;
794 term.line = malloc(term.row * sizeof(Line));
795 term.alt = malloc(term.row * sizeof(Line));
796 term.dirty = malloc(term.row * sizeof(*term.dirty));
797
798 for(row = 0; row < term.row; row++) {
799 term.line[row] = malloc(term.col * sizeof(Glyph));
800 term.alt [row] = malloc(term.col * sizeof(Glyph));
801 term.dirty[row] = 0;
802 }
803 /* setup screen */
804 treset();
805 }
806
807 void
808 tswapscreen(void) {
809 Line* tmp = term.line;
810 term.line = term.alt;
811 term.alt = tmp;
812 term.mode ^= MODE_ALTSCREEN;
813 tfulldirt();
814 }
815
816 void
817 tscrolldown(int orig, int n) {
818 int i;
819 Line temp;
820
821 LIMIT(n, 0, term.bot-orig+1);
822
823 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
824
825 for(i = term.bot; i >= orig+n; i--) {
826 temp = term.line[i];
827 term.line[i] = term.line[i-n];
828 term.line[i-n] = temp;
829
830 term.dirty[i] = 1;
831 term.dirty[i-n] = 1;
832 }
833
834 selscroll(orig, n);
835 }
836
837 void
838 tscrollup(int orig, int n) {
839 int i;
840 Line temp;
841 LIMIT(n, 0, term.bot-orig+1);
842
843 tclearregion(0, orig, term.col-1, orig+n-1);
844
845 for(i = orig; i <= term.bot-n; i++) {
846 temp = term.line[i];
847 term.line[i] = term.line[i+n];
848 term.line[i+n] = temp;
849
850 term.dirty[i] = 1;
851 term.dirty[i+n] = 1;
852 }
853
854 selscroll(orig, -n);
855 }
856
857 void
858 selscroll(int orig, int n) {
859 if(sel.bx == -1)
860 return;
861
862 if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
863 if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
864 sel.bx = -1;
865 return;
866 }
867 if(sel.by < term.top) {
868 sel.by = term.top;
869 sel.bx = 0;
870 }
871 if(sel.ey > term.bot) {
872 sel.ey = term.bot;
873 sel.ex = term.col;
874 }
875 sel.b.y = sel.by, sel.b.x = sel.bx;
876 sel.e.y = sel.ey, sel.e.x = sel.ex;
877 }
878 }
879
880 void
881 tnewline(int first_col) {
882 int y = term.c.y;
883 if(y == term.bot)
884 tscrollup(term.top, 1);
885 else
886 y++;
887 tmoveto(first_col ? 0 : term.c.x, y);
888 }
889
890 void
891 csiparse(void) {
892 /* int noarg = 1; */
893 char *p = escseq.buf;
894
895 escseq.narg = 0;
896 if(*p == '?')
897 escseq.priv = 1, p++;
898
899 while(p < escseq.buf+escseq.len) {
900 while(isdigit(*p)) {
901 escseq.arg[escseq.narg] *= 10;
902 escseq.arg[escseq.narg] += *p++ - '0'/*, noarg = 0 */;
903 }
904 if(*p == ';' && escseq.narg+1 < ESC_ARG_SIZ)
905 escseq.narg++, p++;
906 else {
907 escseq.mode = *p;
908 escseq.narg++;
909 return;
910 }
911 }
912 }
913
914 void
915 tmoveto(int x, int y) {
916 LIMIT(x, 0, term.col-1);
917 LIMIT(y, 0, term.row-1);
918 term.c.state &= ~CURSOR_WRAPNEXT;
919 term.c.x = x;
920 term.c.y = y;
921 }
922
923 void
924 tsetchar(char *c) {
925 term.dirty[term.c.y] = 1;
926 term.line[term.c.y][term.c.x] = term.c.attr;
927 memcpy(term.line[term.c.y][term.c.x].c, c, UTF_SIZ);
928 term.line[term.c.y][term.c.x].state |= GLYPH_SET;
929 }
930
931 void
932 tclearregion(int x1, int y1, int x2, int y2) {
933 int x, y, temp;
934
935 if(x1 > x2)
936 temp = x1, x1 = x2, x2 = temp;
937 if(y1 > y2)
938 temp = y1, y1 = y2, y2 = temp;
939
940 LIMIT(x1, 0, term.col-1);
941 LIMIT(x2, 0, term.col-1);
942 LIMIT(y1, 0, term.row-1);
943 LIMIT(y2, 0, term.row-1);
944
945 for(y = y1; y <= y2; y++) {
946 term.dirty[y] = 1;
947 for(x = x1; x <= x2; x++)
948 term.line[y][x].state = 0;
949 }
950 }
951
952 void
953 tdeletechar(int n) {
954 int src = term.c.x + n;
955 int dst = term.c.x;
956 int size = term.col - src;
957
958 term.dirty[term.c.y] = 1;
959
960 if(src >= term.col) {
961 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
962 return;
963 }
964 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
965 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
966 }
967
968 void
969 tinsertblank(int n) {
970 int src = term.c.x;
971 int dst = src + n;
972 int size = term.col - dst;
973
974 term.dirty[term.c.y] = 1;
975
976 if(dst >= term.col) {
977 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
978 return;
979 }
980 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
981 tclearregion(src, term.c.y, dst - 1, term.c.y);
982 }
983
984 void
985 tinsertblankline(int n) {
986 if(term.c.y < term.top || term.c.y > term.bot)
987 return;
988
989 tscrolldown(term.c.y, n);
990 }
991
992 void
993 tdeleteline(int n) {
994 if(term.c.y < term.top || term.c.y > term.bot)
995 return;
996
997 tscrollup(term.c.y, n);
998 }
999
1000 void
1001 tsetattr(int *attr, int l) {
1002 int i;
1003
1004 for(i = 0; i < l; i++) {
1005 switch(attr[i]) {
1006 case 0:
1007 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD);
1008 term.c.attr.fg = DefaultFG;
1009 term.c.attr.bg = DefaultBG;
1010 break;
1011 case 1:
1012 term.c.attr.mode |= ATTR_BOLD;
1013 break;
1014 case 4:
1015 term.c.attr.mode |= ATTR_UNDERLINE;
1016 break;
1017 case 7:
1018 term.c.attr.mode |= ATTR_REVERSE;
1019 break;
1020 case 22:
1021 term.c.attr.mode &= ~ATTR_BOLD;
1022 break;
1023 case 24:
1024 term.c.attr.mode &= ~ATTR_UNDERLINE;
1025 break;
1026 case 27:
1027 term.c.attr.mode &= ~ATTR_REVERSE;
1028 break;
1029 case 38:
1030 if(i + 2 < l && attr[i + 1] == 5) {
1031 i += 2;
1032 if(BETWEEN(attr[i], 0, 255))
1033 term.c.attr.fg = attr[i];
1034 else
1035 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[i]);
1036 }
1037 else
1038 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
1039 break;
1040 case 39:
1041 term.c.attr.fg = DefaultFG;
1042 break;
1043 case 48:
1044 if(i + 2 < l && attr[i + 1] == 5) {
1045 i += 2;
1046 if(BETWEEN(attr[i], 0, 255))
1047 term.c.attr.bg = attr[i];
1048 else
1049 fprintf(stderr, "erresc: bad bgcolor %d\n", attr[i]);
1050 }
1051 else
1052 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
1053 break;
1054 case 49:
1055 term.c.attr.bg = DefaultBG;
1056 break;
1057 default:
1058 if(BETWEEN(attr[i], 30, 37))
1059 term.c.attr.fg = attr[i] - 30;
1060 else if(BETWEEN(attr[i], 40, 47))
1061 term.c.attr.bg = attr[i] - 40;
1062 else if(BETWEEN(attr[i], 90, 97))
1063 term.c.attr.fg = attr[i] - 90 + 8;
1064 else if(BETWEEN(attr[i], 100, 107))
1065 term.c.attr.fg = attr[i] - 100 + 8;
1066 else
1067 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]), csidump();
1068
1069 break;
1070 }
1071 }
1072 }
1073
1074 void
1075 tsetscroll(int t, int b) {
1076 int temp;
1077
1078 LIMIT(t, 0, term.row-1);
1079 LIMIT(b, 0, term.row-1);
1080 if(t > b) {
1081 temp = t;
1082 t = b;
1083 b = temp;
1084 }
1085 term.top = t;
1086 term.bot = b;
1087 }
1088
1089 void
1090 csihandle(void) {
1091 switch(escseq.mode) {
1092 default:
1093 unknown:
1094 fprintf(stderr, "erresc: unknown csi ");
1095 csidump();
1096 /* die(""); */
1097 break;
1098 case '@': /* ICH -- Insert <n> blank char */
1099 DEFAULT(escseq.arg[0], 1);
1100 tinsertblank(escseq.arg[0]);
1101 break;
1102 case 'A': /* CUU -- Cursor <n> Up */
1103 case 'e':
1104 DEFAULT(escseq.arg[0], 1);
1105 tmoveto(term.c.x, term.c.y-escseq.arg[0]);
1106 break;
1107 case 'B': /* CUD -- Cursor <n> Down */
1108 DEFAULT(escseq.arg[0], 1);
1109 tmoveto(term.c.x, term.c.y+escseq.arg[0]);
1110 break;
1111 case 'C': /* CUF -- Cursor <n> Forward */
1112 case 'a':
1113 DEFAULT(escseq.arg[0], 1);
1114 tmoveto(term.c.x+escseq.arg[0], term.c.y);
1115 break;
1116 case 'D': /* CUB -- Cursor <n> Backward */
1117 DEFAULT(escseq.arg[0], 1);
1118 tmoveto(term.c.x-escseq.arg[0], term.c.y);
1119 break;
1120 case 'E': /* CNL -- Cursor <n> Down and first col */
1121 DEFAULT(escseq.arg[0], 1);
1122 tmoveto(0, term.c.y+escseq.arg[0]);
1123 break;
1124 case 'F': /* CPL -- Cursor <n> Up and first col */
1125 DEFAULT(escseq.arg[0], 1);
1126 tmoveto(0, term.c.y-escseq.arg[0]);
1127 break;
1128 case 'G': /* CHA -- Move to <col> */
1129 case '`': /* XXX: HPA -- same? */
1130 DEFAULT(escseq.arg[0], 1);
1131 tmoveto(escseq.arg[0]-1, term.c.y);
1132 break;
1133 case 'H': /* CUP -- Move to <row> <col> */
1134 case 'f': /* XXX: HVP -- same? */
1135 DEFAULT(escseq.arg[0], 1);
1136 DEFAULT(escseq.arg[1], 1);
1137 tmoveto(escseq.arg[1]-1, escseq.arg[0]-1);
1138 break;
1139 /* XXX: (CSI n I) CHT -- Cursor Forward Tabulation <n> tab stops */
1140 case 'J': /* ED -- Clear screen */
1141 sel.bx = -1;
1142 switch(escseq.arg[0]) {
1143 case 0: /* below */
1144 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1145 if(term.c.y < term.row-1)
1146 tclearregion(0, term.c.y+1, term.col-1, term.row-1);
1147 break;
1148 case 1: /* above */
1149 if(term.c.y > 1)
1150 tclearregion(0, 0, term.col-1, term.c.y-1);
1151 tclearregion(0, term.c.y, term.c.x, term.c.y);
1152 break;
1153 case 2: /* all */
1154 tclearregion(0, 0, term.col-1, term.row-1);
1155 break;
1156 default:
1157 goto unknown;
1158 }
1159 break;
1160 case 'K': /* EL -- Clear line */
1161 switch(escseq.arg[0]) {
1162 case 0: /* right */
1163 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1164 break;
1165 case 1: /* left */
1166 tclearregion(0, term.c.y, term.c.x, term.c.y);
1167 break;
1168 case 2: /* all */
1169 tclearregion(0, term.c.y, term.col-1, term.c.y);
1170 break;
1171 }
1172 break;
1173 case 'S': /* SU -- Scroll <n> line up */
1174 DEFAULT(escseq.arg[0], 1);
1175 tscrollup(term.top, escseq.arg[0]);
1176 break;
1177 case 'T': /* SD -- Scroll <n> line down */
1178 DEFAULT(escseq.arg[0], 1);
1179 tscrolldown(term.top, escseq.arg[0]);
1180 break;
1181 case 'L': /* IL -- Insert <n> blank lines */
1182 DEFAULT(escseq.arg[0], 1);
1183 tinsertblankline(escseq.arg[0]);
1184 break;
1185 case 'l': /* RM -- Reset Mode */
1186 if(escseq.priv) {
1187 switch(escseq.arg[0]) {
1188 case 1:
1189 term.mode &= ~MODE_APPKEYPAD;
1190 break;
1191 case 5: /* DECSCNM -- Remove reverse video */
1192 if(IS_SET(MODE_REVERSE)) {
1193 term.mode &= ~MODE_REVERSE;
1194 draw();
1195 }
1196 break;
1197 case 7:
1198 term.mode &= ~MODE_WRAP;
1199 break;
1200 case 12: /* att610 -- Stop blinking cursor (IGNORED) */
1201 break;
1202 case 20:
1203 term.mode &= ~MODE_CRLF;
1204 break;
1205 case 25:
1206 term.c.state |= CURSOR_HIDE;
1207 break;
1208 case 1000: /* disable X11 xterm mouse reporting */
1209 term.mode &= ~MODE_MOUSEBTN;
1210 break;
1211 case 1002:
1212 term.mode &= ~MODE_MOUSEMOTION;
1213 break;
1214 case 1049: /* = 1047 and 1048 */
1215 case 47:
1216 case 1047:
1217 if(IS_SET(MODE_ALTSCREEN)) {
1218 tclearregion(0, 0, term.col-1, term.row-1);
1219 tswapscreen();
1220 }
1221 if(escseq.arg[0] != 1049)
1222 break;
1223 case 1048:
1224 tcursor(CURSOR_LOAD);
1225 break;
1226 default:
1227 goto unknown;
1228 }
1229 } else {
1230 switch(escseq.arg[0]) {
1231 case 4:
1232 term.mode &= ~MODE_INSERT;
1233 break;
1234 default:
1235 goto unknown;
1236 }
1237 }
1238 break;
1239 case 'M': /* DL -- Delete <n> lines */
1240 DEFAULT(escseq.arg[0], 1);
1241 tdeleteline(escseq.arg[0]);
1242 break;
1243 case 'X': /* ECH -- Erase <n> char */
1244 DEFAULT(escseq.arg[0], 1);
1245 tclearregion(term.c.x, term.c.y, term.c.x + escseq.arg[0], term.c.y);
1246 break;
1247 case 'P': /* DCH -- Delete <n> char */
1248 DEFAULT(escseq.arg[0], 1);
1249 tdeletechar(escseq.arg[0]);
1250 break;
1251 /* XXX: (CSI n Z) CBT -- Cursor Backward Tabulation <n> tab stops */
1252 case 'd': /* VPA -- Move to <row> */
1253 DEFAULT(escseq.arg[0], 1);
1254 tmoveto(term.c.x, escseq.arg[0]-1);
1255 break;
1256 case 'h': /* SM -- Set terminal mode */
1257 if(escseq.priv) {
1258 switch(escseq.arg[0]) {
1259 case 1:
1260 term.mode |= MODE_APPKEYPAD;
1261 break;
1262 case 5: /* DECSCNM -- Reverve video */
1263 if(!IS_SET(MODE_REVERSE)) {
1264 term.mode |= MODE_REVERSE;
1265 draw();
1266 }
1267 break;
1268 case 7:
1269 term.mode |= MODE_WRAP;
1270 break;
1271 case 20:
1272 term.mode |= MODE_CRLF;
1273 break;
1274 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1275 /* fallthrough for xterm cvvis = CSI [ ? 12 ; 25 h */
1276 if(escseq.narg > 1 && escseq.arg[1] != 25)
1277 break;
1278 case 25:
1279 term.c.state &= ~CURSOR_HIDE;
1280 break;
1281 case 1000: /* 1000,1002: enable xterm mouse report */
1282 term.mode |= MODE_MOUSEBTN;
1283 break;
1284 case 1002:
1285 term.mode |= MODE_MOUSEMOTION;
1286 break;
1287 case 1049: /* = 1047 and 1048 */
1288 case 47:
1289 case 1047:
1290 if(IS_SET(MODE_ALTSCREEN))
1291 tclearregion(0, 0, term.col-1, term.row-1);
1292 else
1293 tswapscreen();
1294 if(escseq.arg[0] != 1049)
1295 break;
1296 case 1048:
1297 tcursor(CURSOR_SAVE);
1298 break;
1299 default: goto unknown;
1300 }
1301 } else {
1302 switch(escseq.arg[0]) {
1303 case 4:
1304 term.mode |= MODE_INSERT;
1305 break;
1306 default: goto unknown;
1307 }
1308 };
1309 break;
1310 case 'm': /* SGR -- Terminal attribute (color) */
1311 tsetattr(escseq.arg, escseq.narg);
1312 break;
1313 case 'r': /* DECSTBM -- Set Scrolling Region */
1314 if(escseq.priv)
1315 goto unknown;
1316 else {
1317 DEFAULT(escseq.arg[0], 1);
1318 DEFAULT(escseq.arg[1], term.row);
1319 tsetscroll(escseq.arg[0]-1, escseq.arg[1]-1);
1320 tmoveto(0, 0);
1321 }
1322 break;
1323 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1324 tcursor(CURSOR_SAVE);
1325 break;
1326 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1327 tcursor(CURSOR_LOAD);
1328 break;
1329 }
1330 }
1331
1332 void
1333 csidump(void) {
1334 int i;
1335 printf("ESC [ %s", escseq.priv ? "? " : "");
1336 if(escseq.narg)
1337 for(i = 0; i < escseq.narg; i++)
1338 printf("%d ", escseq.arg[i]);
1339 if(escseq.mode)
1340 putchar(escseq.mode);
1341 putchar('\n');
1342 }
1343
1344 void
1345 csireset(void) {
1346 memset(&escseq, 0, sizeof(escseq));
1347 }
1348
1349 void
1350 tputtab(void) {
1351 int space = TAB - term.c.x % TAB;
1352 tmoveto(term.c.x + space, term.c.y);
1353 }
1354
1355 void
1356 tputc(char *c) {
1357 char ascii = *c;
1358 if(term.esc & ESC_START) {
1359 if(term.esc & ESC_CSI) {
1360 escseq.buf[escseq.len++] = ascii;
1361 if(BETWEEN(ascii, 0x40, 0x7E) || escseq.len >= ESC_BUF_SIZ) {
1362 term.esc = 0;
1363 csiparse(), csihandle();
1364 }
1365 /* TODO: handle other OSC */
1366 } else if(term.esc & ESC_OSC) {
1367 if(ascii == ';') {
1368 term.titlelen = 0;
1369 term.esc = ESC_START | ESC_TITLE;
1370 }
1371 } else if(term.esc & ESC_TITLE) {
1372 if(ascii == '\a' || term.titlelen+1 >= ESC_TITLE_SIZ) {
1373 term.esc = 0;
1374 term.title[term.titlelen] = '\0';
1375 XStoreName(xw.dpy, xw.win, term.title);
1376 } else {
1377 term.title[term.titlelen++] = ascii;
1378 }
1379 } else if(term.esc & ESC_ALTCHARSET) {
1380 switch(ascii) {
1381 case '0': /* Line drawing crap */
1382 term.c.attr.mode |= ATTR_GFX;
1383 break;
1384 case 'B': /* Back to regular text */
1385 term.c.attr.mode &= ~ATTR_GFX;
1386 break;
1387 default:
1388 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
1389 }
1390 term.esc = 0;
1391 } else {
1392 switch(ascii) {
1393 case '[':
1394 term.esc |= ESC_CSI;
1395 break;
1396 case ']':
1397 term.esc |= ESC_OSC;
1398 break;
1399 case '(':
1400 term.esc |= ESC_ALTCHARSET;
1401 break;
1402 case 'D': /* IND -- Linefeed */
1403 if(term.c.y == term.bot)
1404 tscrollup(term.top, 1);
1405 else
1406 tmoveto(term.c.x, term.c.y+1);
1407 term.esc = 0;
1408 break;
1409 case 'E': /* NEL -- Next line */
1410 tnewline(1); /* always go to first col */
1411 term.esc = 0;
1412 break;
1413 case 'M': /* RI -- Reverse index */
1414 if(term.c.y == term.top)
1415 tscrolldown(term.top, 1);
1416 else
1417 tmoveto(term.c.x, term.c.y-1);
1418 term.esc = 0;
1419 break;
1420 case 'c': /* RIS -- Reset to inital state */
1421 treset();
1422 term.esc = 0;
1423 break;
1424 case '=': /* DECPAM -- Application keypad */
1425 term.mode |= MODE_APPKEYPAD;
1426 term.esc = 0;
1427 break;
1428 case '>': /* DECPNM -- Normal keypad */
1429 term.mode &= ~MODE_APPKEYPAD;
1430 term.esc = 0;
1431 break;
1432 case '7': /* DECSC -- Save Cursor */
1433 tcursor(CURSOR_SAVE);
1434 term.esc = 0;
1435 break;
1436 case '8': /* DECRC -- Restore Cursor */
1437 tcursor(CURSOR_LOAD);
1438 term.esc = 0;
1439 break;
1440 default:
1441 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
1442 (unsigned char) ascii, isprint(ascii)?ascii:'.');
1443 term.esc = 0;
1444 }
1445 }
1446 } else {
1447 if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
1448 sel.bx = -1;
1449 switch(ascii) {
1450 case '\t':
1451 tputtab();
1452 break;
1453 case '\b':
1454 tmoveto(term.c.x-1, term.c.y);
1455 break;
1456 case '\r':
1457 tmoveto(0, term.c.y);
1458 break;
1459 case '\f':
1460 case '\v':
1461 case '\n':
1462 /* go to first col if the mode is set */
1463 tnewline(IS_SET(MODE_CRLF));
1464 break;
1465 case '\a':
1466 if(!(xw.state & WIN_FOCUSED))
1467 xseturgency(1);
1468 break;
1469 case '\033':
1470 csireset();
1471 term.esc = ESC_START;
1472 break;
1473 default:
1474 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
1475 tnewline(1); /* always go to first col */
1476 tsetchar(c);
1477 if(term.c.x+1 < term.col)
1478 tmoveto(term.c.x+1, term.c.y);
1479 else
1480 term.c.state |= CURSOR_WRAPNEXT;
1481 }
1482 }
1483 }
1484
1485 int
1486 tresize(int col, int row) {
1487 int i, x;
1488 int minrow = MIN(row, term.row);
1489 int mincol = MIN(col, term.col);
1490 int slide = term.c.y - row + 1;
1491
1492 if(col < 1 || row < 1)
1493 return 0;
1494
1495 /* free unneeded rows */
1496 i = 0;
1497 if(slide > 0) {
1498 /* slide screen to keep cursor where we expect it -
1499 * tscrollup would work here, but we can optimize to
1500 * memmove because we're freeing the earlier lines */
1501 for(/* i = 0 */; i < slide; i++) {
1502 free(term.line[i]);
1503 free(term.alt[i]);
1504 }
1505 memmove(term.line, term.line + slide, row * sizeof(Line));
1506 memmove(term.alt, term.alt + slide, row * sizeof(Line));
1507 }
1508 for(i += row; i < term.row; i++) {
1509 free(term.line[i]);
1510 free(term.alt[i]);
1511 }
1512
1513 /* resize to new height */
1514 term.line = realloc(term.line, row * sizeof(Line));
1515 term.alt = realloc(term.alt, row * sizeof(Line));
1516 term.dirty = realloc(term.dirty, row * sizeof(*term.dirty));
1517
1518 /* resize each row to new width, zero-pad if needed */
1519 for(i = 0; i < minrow; i++) {
1520 term.dirty[i] = 1;
1521 term.line[i] = realloc(term.line[i], col * sizeof(Glyph));
1522 term.alt[i] = realloc(term.alt[i], col * sizeof(Glyph));
1523 for(x = mincol; x < col; x++) {
1524 term.line[i][x].state = 0;
1525 term.alt[i][x].state = 0;
1526 }
1527 }
1528
1529 /* allocate any new rows */
1530 for(/* i == minrow */; i < row; i++) {
1531 term.dirty[i] = 1;
1532 term.line[i] = calloc(col, sizeof(Glyph));
1533 term.alt [i] = calloc(col, sizeof(Glyph));
1534 }
1535
1536 /* update terminal size */
1537 term.col = col, term.row = row;
1538 /* make use of the LIMIT in tmoveto */
1539 tmoveto(term.c.x, term.c.y);
1540 /* reset scrolling region */
1541 tsetscroll(0, row-1);
1542
1543 return (slide > 0);
1544 }
1545
1546 void
1547 xresize(int col, int row) {
1548 Pixmap newbuf;
1549 int oldw, oldh;
1550
1551 oldw = xw.bufw;
1552 oldh = xw.bufh;
1553 xw.bufw = MAX(1, col * xw.cw);
1554 xw.bufh = MAX(1, row * xw.ch);
1555 newbuf = XCreatePixmap(xw.dpy, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dpy, xw.scr));
1556 XCopyArea(xw.dpy, xw.buf, newbuf, dc.gc, 0, 0, xw.bufw, xw.bufh, 0, 0);
1557 XFreePixmap(xw.dpy, xw.buf);
1558 XSetForeground(xw.dpy, dc.gc, dc.col[DefaultBG]);
1559 if(xw.bufw > oldw)
1560 XFillRectangle(xw.dpy, newbuf, dc.gc, oldw, 0,
1561 xw.bufw-oldw, MIN(xw.bufh, oldh));
1562 else if(xw.bufw < oldw && (BORDER > 0 || xw.w > xw.bufw))
1563 XClearArea(xw.dpy, xw.win, BORDER+xw.bufw, BORDER,
1564 xw.w-xw.bufh-BORDER, BORDER+MIN(xw.bufh, oldh),
1565 False);
1566 if(xw.bufh > oldh)
1567 XFillRectangle(xw.dpy, newbuf, dc.gc, 0, oldh,
1568 xw.bufw, xw.bufh-oldh);
1569 else if(xw.bufh < oldh && (BORDER > 0 || xw.h > xw.bufh))
1570 XClearArea(xw.dpy, xw.win, BORDER, BORDER+xw.bufh,
1571 xw.w-2*BORDER, xw.h-xw.bufh-BORDER,
1572 False);
1573 xw.buf = newbuf;
1574 }
1575
1576 void
1577 xloadcols(void) {
1578 int i, r, g, b;
1579 XColor color;
1580 unsigned long white = WhitePixel(xw.dpy, xw.scr);
1581
1582 for(i = 0; i < LEN(colorname); i++) {
1583 if(!XAllocNamedColor(xw.dpy, xw.cmap, colorname[i], &color, &color)) {
1584 dc.col[i] = white;
1585 fprintf(stderr, "Could not allocate color '%s'\n", colorname[i]);
1586 } else
1587 dc.col[i] = color.pixel;
1588 }
1589
1590 /* same colors as xterm */
1591 for(r = 0; r < 6; r++)
1592 for(g = 0; g < 6; g++)
1593 for(b = 0; b < 6; b++) {
1594 color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
1595 color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
1596 color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
1597 if(!XAllocColor(xw.dpy, xw.cmap, &color)) {
1598 dc.col[i] = white;
1599 fprintf(stderr, "Could not allocate color %d\n", i);
1600 } else
1601 dc.col[i] = color.pixel;
1602 i++;
1603 }
1604
1605 for(r = 0; r < 24; r++, i++) {
1606 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
1607 if (!XAllocColor(xw.dpy, xw.cmap, &color)) {
1608 dc.col[i] = white;
1609 fprintf(stderr, "Could not allocate color %d\n", i);
1610 } else
1611 dc.col[i] = color.pixel;
1612 }
1613 }
1614
1615 void
1616 xclear(int x1, int y1, int x2, int y2) {
1617 XSetForeground(xw.dpy, dc.gc, dc.col[IS_SET(MODE_REVERSE) ? DefaultFG : DefaultBG]);
1618 XFillRectangle(xw.dpy, xw.buf, dc.gc,
1619 x1 * xw.cw, y1 * xw.ch,
1620 (x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch);
1621 }
1622
1623 void
1624 xhints(void) {
1625 XClassHint class = {opt_class ? opt_class : TNAME, TNAME};
1626 XWMHints wm = {.flags = InputHint, .input = 1};
1627 XSizeHints size = {
1628 .flags = PSize | PResizeInc | PBaseSize,
1629 .height = xw.h,
1630 .width = xw.w,
1631 .height_inc = xw.ch,
1632 .width_inc = xw.cw,
1633 .base_height = 2*BORDER,
1634 .base_width = 2*BORDER,
1635 };
1636 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, &size, &wm, &class);
1637 }
1638
1639 XFontSet
1640 xinitfont(char *fontstr) {
1641 XFontSet set;
1642 char *def, **missing;
1643 int n;
1644
1645 missing = NULL;
1646 set = XCreateFontSet(xw.dpy, fontstr, &missing, &n, &def);
1647 if(missing) {
1648 while(n--)
1649 fprintf(stderr, "st: missing fontset: %s\n", missing[n]);
1650 XFreeStringList(missing);
1651 }
1652 return set;
1653 }
1654
1655 void
1656 xgetfontinfo(XFontSet set, int *ascent, int *descent, short *lbearing, short *rbearing) {
1657 XFontStruct **xfonts;
1658 char **font_names;
1659 int i, n;
1660
1661 *ascent = *descent = *lbearing = *rbearing = 0;
1662 n = XFontsOfFontSet(set, &xfonts, &font_names);
1663 for(i = 0; i < n; i++) {
1664 *ascent = MAX(*ascent, (*xfonts)->ascent);
1665 *descent = MAX(*descent, (*xfonts)->descent);
1666 *lbearing = MAX(*lbearing, (*xfonts)->min_bounds.lbearing);
1667 *rbearing = MAX(*rbearing, (*xfonts)->max_bounds.rbearing);
1668 xfonts++;
1669 }
1670 }
1671
1672 void
1673 initfonts(char *fontstr, char *bfontstr) {
1674 if((dc.font.set = xinitfont(fontstr)) == NULL ||
1675 (dc.bfont.set = xinitfont(bfontstr)) == NULL)
1676 die("Can't load font %s\n", dc.font.set ? BOLDFONT : FONT);
1677 xgetfontinfo(dc.font.set, &dc.font.ascent, &dc.font.descent,
1678 &dc.font.lbearing, &dc.font.rbearing);
1679 xgetfontinfo(dc.bfont.set, &dc.bfont.ascent, &dc.bfont.descent,
1680 &dc.bfont.lbearing, &dc.bfont.rbearing);
1681 }
1682
1683 void
1684 xinit(void) {
1685 XSetWindowAttributes attrs;
1686 Cursor cursor;
1687 Window parent;
1688
1689 if(!(xw.dpy = XOpenDisplay(NULL)))
1690 die("Can't open display\n");
1691 xw.scr = XDefaultScreen(xw.dpy);
1692
1693 /* font */
1694 initfonts(FONT, BOLDFONT);
1695
1696 /* XXX: Assuming same size for bold font */
1697 xw.cw = dc.font.rbearing - dc.font.lbearing;
1698 xw.ch = dc.font.ascent + dc.font.descent;
1699
1700 /* colors */
1701 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
1702 xloadcols();
1703
1704 /* window - default size */
1705 xw.bufh = term.row * xw.ch;
1706 xw.bufw = term.col * xw.cw;
1707 xw.h = xw.bufh + 2*BORDER;
1708 xw.w = xw.bufw + 2*BORDER;
1709
1710 attrs.background_pixel = dc.col[DefaultBG];
1711 attrs.border_pixel = dc.col[DefaultBG];
1712 attrs.bit_gravity = NorthWestGravity;
1713 attrs.event_mask = FocusChangeMask | KeyPressMask
1714 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
1715 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask
1716 | EnterWindowMask | LeaveWindowMask;
1717 attrs.colormap = xw.cmap;
1718
1719 parent = opt_embed ? strtol(opt_embed, NULL, 0) : XRootWindow(xw.dpy, xw.scr);
1720 xw.win = XCreateWindow(xw.dpy, parent, 0, 0,
1721 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
1722 XDefaultVisual(xw.dpy, xw.scr),
1723 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
1724 | CWColormap,
1725 &attrs);
1726 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dpy, xw.scr));
1727
1728
1729 /* input methods */
1730 xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL);
1731 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
1732 | XIMStatusNothing, XNClientWindow, xw.win,
1733 XNFocusWindow, xw.win, NULL);
1734 /* gc */
1735 dc.gc = XCreateGC(xw.dpy, xw.win, 0, NULL);
1736
1737 /* white cursor, black outline */
1738 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
1739 XDefineCursor(xw.dpy, xw.win, cursor);
1740 XRecolorCursor(xw.dpy, cursor,
1741 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
1742 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
1743
1744 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
1745
1746 XStoreName(xw.dpy, xw.win, opt_title ? opt_title : "st");
1747 XMapWindow(xw.dpy, xw.win);
1748 xhints();
1749 XSync(xw.dpy, 0);
1750 }
1751
1752 void
1753 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
1754 unsigned long xfg = dc.col[base.fg], xbg = dc.col[base.bg], temp;
1755 int winx = x*xw.cw, winy = y*xw.ch + dc.font.ascent, width = charlen*xw.cw;
1756 int i;
1757
1758 /* only switch default fg/bg if term is in RV mode */
1759 if(IS_SET(MODE_REVERSE)) {
1760 if(base.fg == DefaultFG)
1761 xfg = dc.col[DefaultBG];
1762 if(base.bg == DefaultBG)
1763 xbg = dc.col[DefaultFG];
1764 }
1765
1766 if(base.mode & ATTR_REVERSE)
1767 temp = xfg, xfg = xbg, xbg = temp;
1768
1769 XSetBackground(xw.dpy, dc.gc, xbg);
1770 XSetForeground(xw.dpy, dc.gc, xfg);
1771
1772 if(base.mode & ATTR_GFX) {
1773 for(i = 0; i < bytelen; i++) {
1774 char c = gfx[(unsigned int)s[i] % 256];
1775 if(c)
1776 s[i] = c;
1777 else if(s[i] > 0x5f)
1778 s[i] -= 0x5f;
1779 }
1780 }
1781
1782 XmbDrawImageString(xw.dpy, xw.buf, base.mode & ATTR_BOLD ? dc.bfont.set : dc.font.set,
1783 dc.gc, winx, winy, s, bytelen);
1784
1785 if(base.mode & ATTR_UNDERLINE)
1786 XDrawLine(xw.dpy, xw.buf, dc.gc, winx, winy+1, winx+width-1, winy+1);
1787 }
1788
1789 void
1790 xdrawcursor(void) {
1791 static int oldx = 0;
1792 static int oldy = 0;
1793 int sl;
1794 Glyph g = {{' '}, ATTR_NULL, DefaultBG, DefaultCS, 0};
1795
1796 LIMIT(oldx, 0, term.col-1);
1797 LIMIT(oldy, 0, term.row-1);
1798
1799 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
1800 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
1801
1802 /* remove the old cursor */
1803 if(term.line[oldy][oldx].state & GLYPH_SET) {
1804 sl = utf8size(term.line[oldy][oldx].c);
1805 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx, oldy, 1, sl);
1806 } else
1807 xclear(oldx, oldy, oldx, oldy);
1808
1809 /* draw the new one */
1810 if(!(term.c.state & CURSOR_HIDE) && (xw.state & WIN_FOCUSED)) {
1811 sl = utf8size(g.c);
1812 if(IS_SET(MODE_REVERSE))
1813 g.mode |= ATTR_REVERSE, g.fg = DefaultCS, g.bg = DefaultFG;
1814 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
1815 oldx = term.c.x, oldy = term.c.y;
1816 }
1817 }
1818
1819 void
1820 draw() {
1821 drawregion(0, 0, term.col, term.row);
1822 }
1823
1824 void
1825 drawregion(int x1, int y1, int x2, int y2) {
1826 int ic, ib, x, y, ox, sl;
1827 Glyph base, new;
1828 char buf[DRAW_BUF_SIZ];
1829
1830 if(!(xw.state & WIN_VISIBLE))
1831 return;
1832
1833 for(y = y1; y < y2; y++) {
1834 if(!term.dirty[y])
1835 continue;
1836 xclear(0, y, term.col, y);
1837 term.dirty[y] = 0;
1838 base = term.line[y][0];
1839 ic = ib = ox = 0;
1840 for(x = x1; x < x2; x++) {
1841 new = term.line[y][x];
1842 if(sel.bx != -1 && *(new.c) && selected(x, y))
1843 new.mode ^= ATTR_REVERSE;
1844 if(ib > 0 && (!(new.state & GLYPH_SET) || ATTRCMP(base, new) ||
1845 ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
1846 xdraws(buf, base, ox, y, ic, ib);
1847 ic = ib = 0;
1848 }
1849 if(new.state & GLYPH_SET) {
1850 if(ib == 0) {
1851 ox = x;
1852 base = new;
1853 }
1854 sl = utf8size(new.c);
1855 memcpy(buf+ib, new.c, sl);
1856 ib += sl;
1857 ++ic;
1858 }
1859 }
1860 if(ib > 0)
1861 xdraws(buf, base, ox, y, ic, ib);
1862 }
1863 xdrawcursor();
1864 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, x1*xw.cw, y1*xw.ch, x2*xw.cw, y2*xw.ch, BORDER, BORDER);
1865 }
1866
1867 void
1868 expose(XEvent *ev) {
1869 XExposeEvent *e = &ev->xexpose;
1870 if(xw.state & WIN_REDRAW) {
1871 if(!e->count) {
1872 xw.state &= ~WIN_REDRAW;
1873 draw();
1874 }
1875 } else
1876 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, e->x-BORDER, e->y-BORDER,
1877 e->width, e->height, e->x, e->y);
1878 }
1879
1880 void
1881 visibility(XEvent *ev) {
1882 XVisibilityEvent *e = &ev->xvisibility;
1883 if(e->state == VisibilityFullyObscured)
1884 xw.state &= ~WIN_VISIBLE;
1885 else if(!(xw.state & WIN_VISIBLE))
1886 /* need a full redraw for next Expose, not just a buf copy */
1887 xw.state |= WIN_VISIBLE | WIN_REDRAW;
1888 }
1889
1890 void
1891 unmap(XEvent *ev) {
1892 xw.state &= ~WIN_VISIBLE;
1893 }
1894
1895 void
1896 xseturgency(int add) {
1897 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
1898 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
1899 XSetWMHints(xw.dpy, xw.win, h);
1900 XFree(h);
1901 }
1902
1903 void
1904 focus(XEvent *ev) {
1905 if(ev->type == FocusIn) {
1906 xw.state |= WIN_FOCUSED;
1907 xseturgency(0);
1908 } else
1909 xw.state &= ~WIN_FOCUSED;
1910 draw();
1911 }
1912
1913 char*
1914 kmap(KeySym k, unsigned int state) {
1915 int i;
1916 state &= ~Mod2Mask;
1917 for(i = 0; i < LEN(key); i++) {
1918 unsigned int mask = key[i].mask;
1919 if(key[i].k == k && ((state & mask) == mask || (mask == XK_NO_MOD && !state)))
1920 return (char*)key[i].s;
1921 }
1922 return NULL;
1923 }
1924
1925 void
1926 kpress(XEvent *ev) {
1927 XKeyEvent *e = &ev->xkey;
1928 KeySym ksym;
1929 char buf[32];
1930 char *customkey;
1931 int len;
1932 int meta;
1933 int shift;
1934 Status status;
1935
1936 meta = e->state & Mod1Mask;
1937 shift = e->state & ShiftMask;
1938 len = XmbLookupString(xw.xic, e, buf, sizeof(buf), &ksym, &status);
1939
1940 /* 1. custom keys from config.h */
1941 if((customkey = kmap(ksym, e->state)))
1942 ttywrite(customkey, strlen(customkey));
1943 /* 2. hardcoded (overrides X lookup) */
1944 else
1945 switch(ksym) {
1946 case XK_Up:
1947 case XK_Down:
1948 case XK_Left:
1949 case XK_Right:
1950 /* XXX: shift up/down doesn't work */
1951 sprintf(buf, "\033%c%c", IS_SET(MODE_APPKEYPAD) ? 'O' : '[', (shift ? "dacb":"DACB")[ksym - XK_Left]);
1952 ttywrite(buf, 3);
1953 break;
1954 case XK_Insert:
1955 if(shift)
1956 selpaste();
1957 break;
1958 case XK_Return:
1959 if(IS_SET(MODE_CRLF))
1960 ttywrite("\r\n", 2);
1961 else
1962 ttywrite("\r", 1);
1963 break;
1964 /* 3. X lookup */
1965 default:
1966 if(len > 0) {
1967 if(meta && len == 1)
1968 ttywrite("\033", 1);
1969 ttywrite(buf, len);
1970 }
1971 break;
1972 }
1973 }
1974
1975 void
1976 cmessage(XEvent *e) {
1977 /* See xembed specs
1978 http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html */
1979 if (e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
1980 if (e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
1981 xw.state |= WIN_FOCUSED;
1982 xseturgency(0);
1983 } else if (e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
1984 xw.state &= ~WIN_FOCUSED;
1985 }
1986 draw();
1987 }
1988 }
1989
1990 void
1991 resize(XEvent *e) {
1992 int col, row;
1993
1994 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
1995 return;
1996
1997 xw.w = e->xconfigure.width;
1998 xw.h = e->xconfigure.height;
1999 col = (xw.w - 2*BORDER) / xw.cw;
2000 row = (xw.h - 2*BORDER) / xw.ch;
2001 if(col == term.col && row == term.row)
2002 return;
2003 if(tresize(col, row))
2004 draw();
2005 ttyresize(col, row);
2006 xresize(col, row);
2007 }
2008
2009 void
2010 run(void) {
2011 XEvent ev;
2012 fd_set rfd;
2013 int xfd = XConnectionNumber(xw.dpy);
2014
2015 for(;;) {
2016 FD_ZERO(&rfd);
2017 FD_SET(cmdfd, &rfd);
2018 FD_SET(xfd, &rfd);
2019 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, NULL) < 0) {
2020 if(errno == EINTR)
2021 continue;
2022 die("select failed: %s\n", SERRNO);
2023 }
2024 if(FD_ISSET(cmdfd, &rfd)) {
2025 ttyread();
2026 draw();
2027 }
2028 while(XPending(xw.dpy)) {
2029 XNextEvent(xw.dpy, &ev);
2030 if(XFilterEvent(&ev, xw.win))
2031 continue;
2032 if(handler[ev.type])
2033 (handler[ev.type])(&ev);
2034 }
2035 }
2036 }
2037
2038 int
2039 main(int argc, char *argv[]) {
2040 int i;
2041
2042 for(i = 1; i < argc; i++) {
2043 switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
2044 case 't':
2045 if(++i < argc) opt_title = argv[i];
2046 break;
2047 case 'c':
2048 if(++i < argc) opt_class = argv[i];
2049 break;
2050 case 'w':
2051 if(++i < argc) opt_embed = argv[i];
2052 break;
2053 case 'e':
2054 /* eat every remaining arguments */
2055 if(++i < argc) opt_cmd = &argv[i];
2056 goto run;
2057 case 'v':
2058 default:
2059 die(USAGE);
2060 }
2061 }
2062
2063 run:
2064 setlocale(LC_CTYPE, "");
2065 tnew(80, 24);
2066 ttynew();
2067 xinit();
2068 selinit();
2069 run();
2070 return 0;
2071 }