Xinqi Bao's Git

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