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4fc4d3d93749c5eb0e4d1e9614dae554e4cbba4d
[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 <stdbool.h>
10 #include <stdio.h>
11 #include <stdlib.h>
12 #include <string.h>
13 #include <signal.h>
14 #include <sys/ioctl.h>
15 #include <sys/select.h>
16 #include <sys/stat.h>
17 #include <sys/time.h>
18 #include <sys/types.h>
19 #include <sys/wait.h>
20 #include <time.h>
21 #include <unistd.h>
22 #include <X11/Xatom.h>
23 #include <X11/Xlib.h>
24 #include <X11/Xutil.h>
25 #include <X11/cursorfont.h>
26 #include <X11/keysym.h>
27 #include <X11/extensions/Xdbe.h>
28
29 #if defined(__linux)
30 #include <pty.h>
31 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
32 #include <util.h>
33 #elif defined(__FreeBSD__) || defined(__DragonFly__)
34 #include <libutil.h>
35 #endif
36
37 #define USAGE \
38 "st " VERSION " (c) 2010-2012 st engineers\n" \
39 "usage: st [-t title] [-c class] [-w windowid] [-v] [-e command...]\n"
40
41 /* XEMBED messages */
42 #define XEMBED_FOCUS_IN 4
43 #define XEMBED_FOCUS_OUT 5
44
45 /* Arbitrary sizes */
46 #define ESC_TITLE_SIZ 256
47 #define ESC_BUF_SIZ 256
48 #define ESC_ARG_SIZ 16
49 #define DRAW_BUF_SIZ 1024
50 #define UTF_SIZ 4
51 #define XK_NO_MOD UINT_MAX
52 #define XK_ANY_MOD 0
53
54 #define SELECT_TIMEOUT (20*1000) /* 20 ms */
55 #define DRAW_TIMEOUT (20*1000) /* 20 ms */
56
57 #define SERRNO strerror(errno)
58 #define MIN(a, b) ((a) < (b) ? (a) : (b))
59 #define MAX(a, b) ((a) < (b) ? (b) : (a))
60 #define LEN(a) (sizeof(a) / sizeof(a[0]))
61 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
62 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
63 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
64 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
65 #define IS_SET(flag) (term.mode & (flag))
66 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_usec-t2.tv_usec)/1000)
67 #define X2COL(x) (((x) - BORDER)/xw.cw)
68 #define Y2ROW(y) (((y) - BORDER)/xw.ch)
69
70 enum glyph_attribute {
71 ATTR_NULL = 0,
72 ATTR_REVERSE = 1,
73 ATTR_UNDERLINE = 2,
74 ATTR_BOLD = 4,
75 ATTR_GFX = 8,
76 };
77
78 enum cursor_movement {
79 CURSOR_UP,
80 CURSOR_DOWN,
81 CURSOR_LEFT,
82 CURSOR_RIGHT,
83 CURSOR_SAVE,
84 CURSOR_LOAD
85 };
86
87 enum cursor_state {
88 CURSOR_DEFAULT = 0,
89 CURSOR_HIDE = 1,
90 CURSOR_WRAPNEXT = 2
91 };
92
93 enum glyph_state {
94 GLYPH_SET = 1,
95 GLYPH_DIRTY = 2
96 };
97
98 enum term_mode {
99 MODE_WRAP = 1,
100 MODE_INSERT = 2,
101 MODE_APPKEYPAD = 4,
102 MODE_ALTSCREEN = 8,
103 MODE_CRLF = 16,
104 MODE_MOUSEBTN = 32,
105 MODE_MOUSEMOTION = 64,
106 MODE_MOUSE = 32|64,
107 MODE_REVERSE = 128
108 };
109
110 enum escape_state {
111 ESC_START = 1,
112 ESC_CSI = 2,
113 ESC_OSC = 4,
114 ESC_TITLE = 8,
115 ESC_ALTCHARSET = 16
116 };
117
118 enum window_state {
119 WIN_VISIBLE = 1,
120 WIN_REDRAW = 2,
121 WIN_FOCUSED = 4
122 };
123
124 /* bit macro */
125 #undef B0
126 enum { B0=1, B1=2, B2=4, B3=8, B4=16, B5=32, B6=64, B7=128 };
127
128 typedef unsigned char uchar;
129 typedef unsigned int uint;
130 typedef unsigned long ulong;
131 typedef unsigned short ushort;
132
133 typedef struct {
134 char c[UTF_SIZ]; /* character code */
135 uchar mode; /* attribute flags */
136 ushort fg; /* foreground */
137 ushort bg; /* background */
138 uchar state; /* state flags */
139 } Glyph;
140
141 typedef Glyph* Line;
142
143 typedef struct {
144 Glyph attr; /* current char attributes */
145 int x;
146 int y;
147 char state;
148 } TCursor;
149
150 /* CSI Escape sequence structs */
151 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
152 typedef struct {
153 char buf[ESC_BUF_SIZ]; /* raw string */
154 int len; /* raw string length */
155 char priv;
156 int arg[ESC_ARG_SIZ];
157 int narg; /* nb of args */
158 char mode;
159 } CSIEscape;
160
161 /* Internal representation of the screen */
162 typedef struct {
163 int row; /* nb row */
164 int col; /* nb col */
165 Line* line; /* screen */
166 Line* alt; /* alternate screen */
167 bool* dirty; /* dirtyness of lines */
168 TCursor c; /* cursor */
169 int top; /* top scroll limit */
170 int bot; /* bottom scroll limit */
171 int mode; /* terminal mode flags */
172 int esc; /* escape state flags */
173 char title[ESC_TITLE_SIZ];
174 int titlelen;
175 } Term;
176
177 /* Purely graphic info */
178 typedef struct {
179 Display* dpy;
180 Colormap cmap;
181 Window win;
182 XdbeBackBuffer buf;
183 Atom xembed;
184 XIM xim;
185 XIC xic;
186 int scr;
187 int w; /* window width */
188 int h; /* window height */
189 int ch; /* char height */
190 int cw; /* char width */
191 char state; /* focus, redraw, visible */
192 struct timeval lastdraw;
193 } XWindow;
194
195 typedef struct {
196 KeySym k;
197 uint mask;
198 char s[ESC_BUF_SIZ];
199 } Key;
200
201
202 /* TODO: use better name for vars... */
203 typedef struct {
204 int mode;
205 int bx, by;
206 int ex, ey;
207 struct {int x, y;} b, e;
208 char *clip;
209 Atom xtarget;
210 struct timeval tclick1;
211 struct timeval tclick2;
212 } Selection;
213
214 #include "config.h"
215
216 /* Drawing Context */
217 typedef struct {
218 ulong col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
219 GC gc;
220 struct {
221 int ascent;
222 int descent;
223 short lbearing;
224 short rbearing;
225 XFontSet set;
226 } font, bfont;
227 } DC;
228
229 static void die(const char*, ...);
230 static void draw(void);
231 static void drawregion(int, int, int, int);
232 static void execsh(void);
233 static void sigchld(int);
234 static void run(void);
235 static bool last_draw_too_old(void);
236
237 static void csidump(void);
238 static void csihandle(void);
239 static void csiparse(void);
240 static void csireset(void);
241
242 static void tclearregion(int, int, int, int);
243 static void tcursor(int);
244 static void tdeletechar(int);
245 static void tdeleteline(int);
246 static void tinsertblank(int);
247 static void tinsertblankline(int);
248 static void tmoveto(int, int);
249 static void tnew(int, int);
250 static void tnewline(int);
251 static void tputtab(void);
252 static void tputc(char*);
253 static void treset(void);
254 static int tresize(int, int);
255 static void tscrollup(int, int);
256 static void tscrolldown(int, int);
257 static void tsetattr(int*, int);
258 static void tsetchar(char*);
259 static void tsetscroll(int, int);
260 static void tswapscreen(void);
261 static void tsetdirt(int, int);
262 static void tfulldirt(void);
263
264 static void ttynew(void);
265 static void ttyread(void);
266 static void ttyresize(int, int);
267 static void ttywrite(const char *, size_t);
268
269 static void xdraws(char *, Glyph, int, int, int, int);
270 static void xhints(void);
271 static void xclear(int, int, int, int);
272 static void xcopy();
273 static void xdrawcursor(void);
274 static void xinit(void);
275 static void xloadcols(void);
276 static void xseturgency(int);
277 static void xsetsel(char*);
278 static void xresize(int, int);
279
280 static void expose(XEvent *);
281 static void visibility(XEvent *);
282 static void unmap(XEvent *);
283 static char* kmap(KeySym, uint);
284 static void kpress(XEvent *);
285 static void cmessage(XEvent *);
286 static void resize(XEvent *);
287 static void focus(XEvent *);
288 static void brelease(XEvent *);
289 static void bpress(XEvent *);
290 static void bmotion(XEvent *);
291 static void selnotify(XEvent *);
292 static void selrequest(XEvent *);
293
294 static void selinit(void);
295 static inline bool selected(int, int);
296 static void selcopy(void);
297 static void selpaste();
298 static void selscroll(int, int);
299
300 static int utf8decode(char *, long *);
301 static int utf8encode(long *, char *);
302 static int utf8size(char *);
303 static int isfullutf8(char *, int);
304
305 static void (*handler[LASTEvent])(XEvent *) = {
306 [KeyPress] = kpress,
307 [ClientMessage] = cmessage,
308 [ConfigureNotify] = resize,
309 [VisibilityNotify] = visibility,
310 [UnmapNotify] = unmap,
311 [Expose] = expose,
312 [FocusIn] = focus,
313 [FocusOut] = focus,
314 [MotionNotify] = bmotion,
315 [ButtonPress] = bpress,
316 [ButtonRelease] = brelease,
317 [SelectionNotify] = selnotify,
318 [SelectionRequest] = selrequest,
319 };
320
321 /* Globals */
322 static DC dc;
323 static XWindow xw;
324 static Term term;
325 static CSIEscape escseq;
326 static int cmdfd;
327 static pid_t pid;
328 static Selection sel;
329 static char **opt_cmd = NULL;
330 static char *opt_title = NULL;
331 static char *opt_embed = NULL;
332 static char *opt_class = NULL;
333
334 int
335 utf8decode(char *s, long *u) {
336 uchar c;
337 int i, n, rtn;
338
339 rtn = 1;
340 c = *s;
341 if(~c & B7) { /* 0xxxxxxx */
342 *u = c;
343 return rtn;
344 } else if((c & (B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */
345 *u = c&(B4|B3|B2|B1|B0);
346 n = 1;
347 } else if((c & (B7|B6|B5|B4)) == (B7|B6|B5)) { /* 1110xxxx */
348 *u = c&(B3|B2|B1|B0);
349 n = 2;
350 } else if((c & (B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) { /* 11110xxx */
351 *u = c & (B2|B1|B0);
352 n = 3;
353 } else
354 goto invalid;
355 for(i = n, ++s; i > 0; --i, ++rtn, ++s) {
356 c = *s;
357 if((c & (B7|B6)) != B7) /* 10xxxxxx */
358 goto invalid;
359 *u <<= 6;
360 *u |= c & (B5|B4|B3|B2|B1|B0);
361 }
362 if((n == 1 && *u < 0x80) ||
363 (n == 2 && *u < 0x800) ||
364 (n == 3 && *u < 0x10000) ||
365 (*u >= 0xD800 && *u <= 0xDFFF))
366 goto invalid;
367 return rtn;
368 invalid:
369 *u = 0xFFFD;
370 return rtn;
371 }
372
373 int
374 utf8encode(long *u, char *s) {
375 uchar *sp;
376 ulong uc;
377 int i, n;
378
379 sp = (uchar*) s;
380 uc = *u;
381 if(uc < 0x80) {
382 *sp = uc; /* 0xxxxxxx */
383 return 1;
384 } else if(*u < 0x800) {
385 *sp = (uc >> 6) | (B7|B6); /* 110xxxxx */
386 n = 1;
387 } else if(uc < 0x10000) {
388 *sp = (uc >> 12) | (B7|B6|B5); /* 1110xxxx */
389 n = 2;
390 } else if(uc <= 0x10FFFF) {
391 *sp = (uc >> 18) | (B7|B6|B5|B4); /* 11110xxx */
392 n = 3;
393 } else {
394 goto invalid;
395 }
396 for(i=n,++sp; i>0; --i,++sp)
397 *sp = ((uc >> 6*(i-1)) & (B5|B4|B3|B2|B1|B0)) | B7; /* 10xxxxxx */
398 return n+1;
399 invalid:
400 /* U+FFFD */
401 *s++ = '\xEF';
402 *s++ = '\xBF';
403 *s = '\xBD';
404 return 3;
405 }
406
407 /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
408 UTF-8 otherwise return 0 */
409 int
410 isfullutf8(char *s, int b) {
411 uchar *c1, *c2, *c3;
412
413 c1 = (uchar *) s;
414 c2 = (uchar *) ++s;
415 c3 = (uchar *) ++s;
416 if(b < 1)
417 return 0;
418 else if((*c1&(B7|B6|B5)) == (B7|B6) && b == 1)
419 return 0;
420 else if((*c1&(B7|B6|B5|B4)) == (B7|B6|B5) &&
421 ((b == 1) ||
422 ((b == 2) && (*c2&(B7|B6)) == B7)))
423 return 0;
424 else if((*c1&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4) &&
425 ((b == 1) ||
426 ((b == 2) && (*c2&(B7|B6)) == B7) ||
427 ((b == 3) && (*c2&(B7|B6)) == B7 && (*c3&(B7|B6)) == B7)))
428 return 0;
429 else
430 return 1;
431 }
432
433 int
434 utf8size(char *s) {
435 uchar c = *s;
436
437 if(~c&B7)
438 return 1;
439 else if((c&(B7|B6|B5)) == (B7|B6))
440 return 2;
441 else if((c&(B7|B6|B5|B4)) == (B7|B6|B5))
442 return 3;
443 else
444 return 4;
445 }
446
447 void
448 selinit(void) {
449 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
450 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
451 sel.mode = 0;
452 sel.bx = -1;
453 sel.clip = NULL;
454 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
455 if(sel.xtarget == None)
456 sel.xtarget = XA_STRING;
457 }
458
459 static inline bool
460 selected(int x, int y) {
461 if(sel.ey == y && sel.by == y) {
462 int bx = MIN(sel.bx, sel.ex);
463 int ex = MAX(sel.bx, sel.ex);
464 return BETWEEN(x, bx, ex);
465 }
466 return ((sel.b.y < y&&y < sel.e.y) || (y==sel.e.y && x<=sel.e.x))
467 || (y==sel.b.y && x>=sel.b.x && (x<=sel.e.x || sel.b.y!=sel.e.y));
468 }
469
470 void
471 getbuttoninfo(XEvent *e, int *b, int *x, int *y) {
472 if(b)
473 *b = e->xbutton.button;
474
475 *x = X2COL(e->xbutton.x);
476 *y = Y2ROW(e->xbutton.y);
477 sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
478 sel.b.y = MIN(sel.by, sel.ey);
479 sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
480 sel.e.y = MAX(sel.by, sel.ey);
481 }
482
483 void
484 mousereport(XEvent *e) {
485 int x = X2COL(e->xbutton.x);
486 int y = Y2ROW(e->xbutton.y);
487 int button = e->xbutton.button;
488 int state = e->xbutton.state;
489 char buf[] = { '\033', '[', 'M', 0, 32+x+1, 32+y+1 };
490 static int ob, ox, oy;
491
492 /* from urxvt */
493 if(e->xbutton.type == MotionNotify) {
494 if(!IS_SET(MODE_MOUSEMOTION) || (x == ox && y == oy))
495 return;
496 button = ob + 32;
497 ox = x, oy = y;
498 } else if(e->xbutton.type == ButtonRelease || button == AnyButton) {
499 button = 3;
500 } else {
501 button -= Button1;
502 if(button >= 3)
503 button += 64 - 3;
504 if(e->xbutton.type == ButtonPress) {
505 ob = button;
506 ox = x, oy = y;
507 }
508 }
509
510 buf[3] = 32 + button + (state & ShiftMask ? 4 : 0)
511 + (state & Mod4Mask ? 8 : 0)
512 + (state & ControlMask ? 16 : 0);
513
514 ttywrite(buf, sizeof(buf));
515 }
516
517 void
518 bpress(XEvent *e) {
519 if(IS_SET(MODE_MOUSE))
520 mousereport(e);
521 else if(e->xbutton.button == Button1) {
522 if(sel.bx != -1)
523 tsetdirt(sel.b.y, sel.e.y);
524 sel.mode = 1;
525 sel.ex = sel.bx = X2COL(e->xbutton.x);
526 sel.ey = sel.by = Y2ROW(e->xbutton.y);
527 }
528 }
529
530 void
531 selcopy(void) {
532 char *str, *ptr;
533 int x, y, bufsize, is_selected = 0;
534
535 if(sel.bx == -1)
536 str = NULL;
537
538 else {
539 bufsize = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
540 ptr = str = malloc(bufsize);
541
542 /* append every set & selected glyph to the selection */
543 for(y = 0; y < term.row; y++) {
544 for(x = 0; x < term.col; x++) {
545 is_selected = selected(x, y);
546 if((term.line[y][x].state & GLYPH_SET) && is_selected) {
547 int size = utf8size(term.line[y][x].c);
548 memcpy(ptr, term.line[y][x].c, size);
549 ptr += size;
550 }
551 }
552
553 /* \n at the end of every selected line except for the last one */
554 if(is_selected && y < sel.e.y)
555 *ptr++ = '\n';
556 }
557 *ptr = 0;
558 }
559 xsetsel(str);
560 }
561
562 void
563 selnotify(XEvent *e) {
564 ulong nitems, ofs, rem;
565 int format;
566 uchar *data;
567 Atom type;
568
569 ofs = 0;
570 do {
571 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
572 False, AnyPropertyType, &type, &format,
573 &nitems, &rem, &data)) {
574 fprintf(stderr, "Clipboard allocation failed\n");
575 return;
576 }
577 ttywrite((const char *) data, nitems * format / 8);
578 XFree(data);
579 /* number of 32-bit chunks returned */
580 ofs += nitems * format / 32;
581 } while(rem > 0);
582 }
583
584 void
585 selpaste() {
586 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY, xw.win, CurrentTime);
587 }
588
589 void
590 selrequest(XEvent *e) {
591 XSelectionRequestEvent *xsre;
592 XSelectionEvent xev;
593 Atom xa_targets;
594
595 xsre = (XSelectionRequestEvent *) e;
596 xev.type = SelectionNotify;
597 xev.requestor = xsre->requestor;
598 xev.selection = xsre->selection;
599 xev.target = xsre->target;
600 xev.time = xsre->time;
601 /* reject */
602 xev.property = None;
603
604 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
605 if(xsre->target == xa_targets) {
606 /* respond with the supported type */
607 Atom string = sel.xtarget;
608 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
609 XA_ATOM, 32, PropModeReplace,
610 (uchar *) &string, 1);
611 xev.property = xsre->property;
612 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
613 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
614 xsre->target, 8, PropModeReplace,
615 (uchar *) sel.clip, strlen(sel.clip));
616 xev.property = xsre->property;
617 }
618
619 /* all done, send a notification to the listener */
620 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
621 fprintf(stderr, "Error sending SelectionNotify event\n");
622 }
623
624 void
625 xsetsel(char *str) {
626 /* register the selection for both the clipboard and the primary */
627 Atom clipboard;
628
629 free(sel.clip);
630 sel.clip = str;
631
632 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
633
634 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
635 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
636
637 XFlush(xw.dpy);
638 }
639
640 void
641 brelease(XEvent *e) {
642 if(IS_SET(MODE_MOUSE)) {
643 mousereport(e);
644 return;
645 }
646 if(e->xbutton.button == Button2)
647 selpaste();
648 else if(e->xbutton.button == Button1) {
649 sel.mode = 0;
650 getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
651 term.dirty[sel.ey] = 1;
652 if(sel.bx == sel.ex && sel.by == sel.ey) {
653 struct timeval now;
654 sel.bx = -1;
655 gettimeofday(&now, NULL);
656
657 if(TIMEDIFF(now, sel.tclick2) <= TRIPLECLICK_TIMEOUT) {
658 /* triple click on the line */
659 sel.b.x = sel.bx = 0;
660 sel.e.x = sel.ex = term.col;
661 sel.b.y = sel.e.y = sel.ey;
662 selcopy();
663 } else if(TIMEDIFF(now, sel.tclick1) <= DOUBLECLICK_TIMEOUT) {
664 /* double click to select word */
665 sel.bx = sel.ex;
666 while(sel.bx > 0 && term.line[sel.ey][sel.bx-1].state & GLYPH_SET &&
667 term.line[sel.ey][sel.bx-1].c[0] != ' ') sel.bx--;
668 sel.b.x = sel.bx;
669 while(sel.ex < term.col-1 && term.line[sel.ey][sel.ex+1].state & GLYPH_SET &&
670 term.line[sel.ey][sel.ex+1].c[0] != ' ') sel.ex++;
671 sel.e.x = sel.ex;
672 sel.b.y = sel.e.y = sel.ey;
673 selcopy();
674 }
675 } else
676 selcopy();
677 }
678 memcpy(&sel.tclick2, &sel.tclick1, sizeof(struct timeval));
679 gettimeofday(&sel.tclick1, NULL);
680 draw();
681 }
682
683 void
684 bmotion(XEvent *e) {
685 if(IS_SET(MODE_MOUSE)) {
686 mousereport(e);
687 return;
688 }
689 if(sel.mode) {
690 int oldey = sel.ey, oldex = sel.ex;
691 getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
692
693 if(oldey != sel.ey || oldex != sel.ex) {
694 int starty = MIN(oldey, sel.ey);
695 int endy = MAX(oldey, sel.ey);
696 tsetdirt(starty, endy);
697 draw();
698 }
699 }
700 }
701
702 void
703 die(const char *errstr, ...) {
704 va_list ap;
705
706 va_start(ap, errstr);
707 vfprintf(stderr, errstr, ap);
708 va_end(ap);
709 exit(EXIT_FAILURE);
710 }
711
712 void
713 execsh(void) {
714 char **args;
715 char *envshell = getenv("SHELL");
716
717 DEFAULT(envshell, SHELL);
718 putenv("TERM="TNAME);
719 args = opt_cmd ? opt_cmd : (char*[]){envshell, "-i", NULL};
720 execvp(args[0], args);
721 exit(EXIT_FAILURE);
722 }
723
724 void
725 sigchld(int a) {
726 int stat = 0;
727 if(waitpid(pid, &stat, 0) < 0)
728 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
729 if(WIFEXITED(stat))
730 exit(WEXITSTATUS(stat));
731 else
732 exit(EXIT_FAILURE);
733 }
734
735 void
736 ttynew(void) {
737 int m, s;
738
739 /* seems to work fine on linux, openbsd and freebsd */
740 struct winsize w = {term.row, term.col, 0, 0};
741 if(openpty(&m, &s, NULL, NULL, &w) < 0)
742 die("openpty failed: %s\n", SERRNO);
743
744 switch(pid = fork()) {
745 case -1:
746 die("fork failed\n");
747 break;
748 case 0:
749 setsid(); /* create a new process group */
750 dup2(s, STDIN_FILENO);
751 dup2(s, STDOUT_FILENO);
752 dup2(s, STDERR_FILENO);
753 if(ioctl(s, TIOCSCTTY, NULL) < 0)
754 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
755 close(s);
756 close(m);
757 execsh();
758 break;
759 default:
760 close(s);
761 cmdfd = m;
762 signal(SIGCHLD, sigchld);
763 }
764 }
765
766 void
767 dump(char c) {
768 static int col;
769 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
770 if(++col % 10 == 0)
771 fprintf(stderr, "\n");
772 }
773
774 void
775 ttyread(void) {
776 static char buf[BUFSIZ];
777 static int buflen = 0;
778 char *ptr;
779 char s[UTF_SIZ];
780 int charsize; /* size of utf8 char in bytes */
781 long utf8c;
782 int ret;
783
784 /* append read bytes to unprocessed bytes */
785 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
786 die("Couldn't read from shell: %s\n", SERRNO);
787
788 /* process every complete utf8 char */
789 buflen += ret;
790 ptr = buf;
791 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
792 charsize = utf8decode(ptr, &utf8c);
793 utf8encode(&utf8c, s);
794 tputc(s);
795 ptr += charsize;
796 buflen -= charsize;
797 }
798
799 /* keep any uncomplete utf8 char for the next call */
800 memmove(buf, ptr, buflen);
801 }
802
803 void
804 ttywrite(const char *s, size_t n) {
805 if(write(cmdfd, s, n) == -1)
806 die("write error on tty: %s\n", SERRNO);
807 }
808
809 void
810 ttyresize(int x, int y) {
811 struct winsize w;
812
813 w.ws_row = term.row;
814 w.ws_col = term.col;
815 w.ws_xpixel = w.ws_ypixel = 0;
816 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
817 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
818 }
819
820 void
821 tsetdirt(int top, int bot)
822 {
823 int i;
824
825 LIMIT(top, 0, term.row-1);
826 LIMIT(bot, 0, term.row-1);
827
828 for(i = top; i <= bot; i++)
829 term.dirty[i] = 1;
830 }
831
832 void
833 tfulldirt(void)
834 {
835 tsetdirt(0, term.row-1);
836 }
837
838 void
839 tcursor(int mode) {
840 static TCursor c;
841
842 if(mode == CURSOR_SAVE)
843 c = term.c;
844 else if(mode == CURSOR_LOAD)
845 term.c = c, tmoveto(c.x, c.y);
846 }
847
848 void
849 treset(void) {
850 term.c = (TCursor){{
851 .mode = ATTR_NULL,
852 .fg = DefaultFG,
853 .bg = DefaultBG
854 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
855
856 term.top = 0, term.bot = term.row - 1;
857 term.mode = MODE_WRAP;
858 tclearregion(0, 0, term.col-1, term.row-1);
859 }
860
861 void
862 tnew(int col, int row) {
863 /* set screen size */
864 term.row = row, term.col = col;
865 term.line = malloc(term.row * sizeof(Line));
866 term.alt = malloc(term.row * sizeof(Line));
867 term.dirty = malloc(term.row * sizeof(*term.dirty));
868
869 for(row = 0; row < term.row; row++) {
870 term.line[row] = malloc(term.col * sizeof(Glyph));
871 term.alt [row] = malloc(term.col * sizeof(Glyph));
872 term.dirty[row] = 0;
873 }
874 /* setup screen */
875 treset();
876 }
877
878 void
879 tswapscreen(void) {
880 Line* tmp = term.line;
881 term.line = term.alt;
882 term.alt = tmp;
883 term.mode ^= MODE_ALTSCREEN;
884 tfulldirt();
885 }
886
887 void
888 tscrolldown(int orig, int n) {
889 int i;
890 Line temp;
891
892 LIMIT(n, 0, term.bot-orig+1);
893
894 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
895
896 for(i = term.bot; i >= orig+n; i--) {
897 temp = term.line[i];
898 term.line[i] = term.line[i-n];
899 term.line[i-n] = temp;
900
901 term.dirty[i] = 1;
902 term.dirty[i-n] = 1;
903 }
904
905 selscroll(orig, n);
906 }
907
908 void
909 tscrollup(int orig, int n) {
910 int i;
911 Line temp;
912 LIMIT(n, 0, term.bot-orig+1);
913
914 tclearregion(0, orig, term.col-1, orig+n-1);
915
916 for(i = orig; i <= term.bot-n; i++) {
917 temp = term.line[i];
918 term.line[i] = term.line[i+n];
919 term.line[i+n] = temp;
920
921 term.dirty[i] = 1;
922 term.dirty[i+n] = 1;
923 }
924
925 selscroll(orig, -n);
926 }
927
928 void
929 selscroll(int orig, int n) {
930 if(sel.bx == -1)
931 return;
932
933 if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
934 if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
935 sel.bx = -1;
936 return;
937 }
938 if(sel.by < term.top) {
939 sel.by = term.top;
940 sel.bx = 0;
941 }
942 if(sel.ey > term.bot) {
943 sel.ey = term.bot;
944 sel.ex = term.col;
945 }
946 sel.b.y = sel.by, sel.b.x = sel.bx;
947 sel.e.y = sel.ey, sel.e.x = sel.ex;
948 }
949 }
950
951 void
952 tnewline(int first_col) {
953 int y = term.c.y;
954 if(y == term.bot)
955 tscrollup(term.top, 1);
956 else
957 y++;
958 tmoveto(first_col ? 0 : term.c.x, y);
959 }
960
961 void
962 csiparse(void) {
963 /* int noarg = 1; */
964 char *p = escseq.buf;
965
966 escseq.narg = 0;
967 if(*p == '?')
968 escseq.priv = 1, p++;
969
970 while(p < escseq.buf+escseq.len) {
971 while(isdigit(*p)) {
972 escseq.arg[escseq.narg] *= 10;
973 escseq.arg[escseq.narg] += *p++ - '0'/*, noarg = 0 */;
974 }
975 if(*p == ';' && escseq.narg+1 < ESC_ARG_SIZ)
976 escseq.narg++, p++;
977 else {
978 escseq.mode = *p;
979 escseq.narg++;
980 return;
981 }
982 }
983 }
984
985 void
986 tmoveto(int x, int y) {
987 LIMIT(x, 0, term.col-1);
988 LIMIT(y, 0, term.row-1);
989 term.c.state &= ~CURSOR_WRAPNEXT;
990 term.c.x = x;
991 term.c.y = y;
992 }
993
994 void
995 tsetchar(char *c) {
996 term.dirty[term.c.y] = 1;
997 term.line[term.c.y][term.c.x] = term.c.attr;
998 memcpy(term.line[term.c.y][term.c.x].c, c, UTF_SIZ);
999 term.line[term.c.y][term.c.x].state |= GLYPH_SET;
1000 }
1001
1002 void
1003 tclearregion(int x1, int y1, int x2, int y2) {
1004 int x, y, temp;
1005
1006 if(x1 > x2)
1007 temp = x1, x1 = x2, x2 = temp;
1008 if(y1 > y2)
1009 temp = y1, y1 = y2, y2 = temp;
1010
1011 LIMIT(x1, 0, term.col-1);
1012 LIMIT(x2, 0, term.col-1);
1013 LIMIT(y1, 0, term.row-1);
1014 LIMIT(y2, 0, term.row-1);
1015
1016 for(y = y1; y <= y2; y++) {
1017 term.dirty[y] = 1;
1018 for(x = x1; x <= x2; x++)
1019 term.line[y][x].state = 0;
1020 }
1021 }
1022
1023 void
1024 tdeletechar(int n) {
1025 int src = term.c.x + n;
1026 int dst = term.c.x;
1027 int size = term.col - src;
1028
1029 term.dirty[term.c.y] = 1;
1030
1031 if(src >= term.col) {
1032 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1033 return;
1034 }
1035 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
1036 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1037 }
1038
1039 void
1040 tinsertblank(int n) {
1041 int src = term.c.x;
1042 int dst = src + n;
1043 int size = term.col - dst;
1044
1045 term.dirty[term.c.y] = 1;
1046
1047 if(dst >= term.col) {
1048 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1049 return;
1050 }
1051 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
1052 tclearregion(src, term.c.y, dst - 1, term.c.y);
1053 }
1054
1055 void
1056 tinsertblankline(int n) {
1057 if(term.c.y < term.top || term.c.y > term.bot)
1058 return;
1059
1060 tscrolldown(term.c.y, n);
1061 }
1062
1063 void
1064 tdeleteline(int n) {
1065 if(term.c.y < term.top || term.c.y > term.bot)
1066 return;
1067
1068 tscrollup(term.c.y, n);
1069 }
1070
1071 void
1072 tsetattr(int *attr, int l) {
1073 int i;
1074
1075 for(i = 0; i < l; i++) {
1076 switch(attr[i]) {
1077 case 0:
1078 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD);
1079 term.c.attr.fg = DefaultFG;
1080 term.c.attr.bg = DefaultBG;
1081 break;
1082 case 1:
1083 term.c.attr.mode |= ATTR_BOLD;
1084 break;
1085 case 4:
1086 term.c.attr.mode |= ATTR_UNDERLINE;
1087 break;
1088 case 7:
1089 term.c.attr.mode |= ATTR_REVERSE;
1090 break;
1091 case 22:
1092 term.c.attr.mode &= ~ATTR_BOLD;
1093 break;
1094 case 24:
1095 term.c.attr.mode &= ~ATTR_UNDERLINE;
1096 break;
1097 case 27:
1098 term.c.attr.mode &= ~ATTR_REVERSE;
1099 break;
1100 case 38:
1101 if(i + 2 < l && attr[i + 1] == 5) {
1102 i += 2;
1103 if(BETWEEN(attr[i], 0, 255))
1104 term.c.attr.fg = attr[i];
1105 else
1106 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[i]);
1107 }
1108 else
1109 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
1110 break;
1111 case 39:
1112 term.c.attr.fg = DefaultFG;
1113 break;
1114 case 48:
1115 if(i + 2 < l && attr[i + 1] == 5) {
1116 i += 2;
1117 if(BETWEEN(attr[i], 0, 255))
1118 term.c.attr.bg = attr[i];
1119 else
1120 fprintf(stderr, "erresc: bad bgcolor %d\n", attr[i]);
1121 }
1122 else
1123 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
1124 break;
1125 case 49:
1126 term.c.attr.bg = DefaultBG;
1127 break;
1128 default:
1129 if(BETWEEN(attr[i], 30, 37))
1130 term.c.attr.fg = attr[i] - 30;
1131 else if(BETWEEN(attr[i], 40, 47))
1132 term.c.attr.bg = attr[i] - 40;
1133 else if(BETWEEN(attr[i], 90, 97))
1134 term.c.attr.fg = attr[i] - 90 + 8;
1135 else if(BETWEEN(attr[i], 100, 107))
1136 term.c.attr.fg = attr[i] - 100 + 8;
1137 else
1138 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]), csidump();
1139
1140 break;
1141 }
1142 }
1143 }
1144
1145 void
1146 tsetscroll(int t, int b) {
1147 int temp;
1148
1149 LIMIT(t, 0, term.row-1);
1150 LIMIT(b, 0, term.row-1);
1151 if(t > b) {
1152 temp = t;
1153 t = b;
1154 b = temp;
1155 }
1156 term.top = t;
1157 term.bot = b;
1158 }
1159
1160 void
1161 csihandle(void) {
1162 switch(escseq.mode) {
1163 default:
1164 unknown:
1165 fprintf(stderr, "erresc: unknown csi ");
1166 csidump();
1167 /* die(""); */
1168 break;
1169 case '@': /* ICH -- Insert <n> blank char */
1170 DEFAULT(escseq.arg[0], 1);
1171 tinsertblank(escseq.arg[0]);
1172 break;
1173 case 'A': /* CUU -- Cursor <n> Up */
1174 case 'e':
1175 DEFAULT(escseq.arg[0], 1);
1176 tmoveto(term.c.x, term.c.y-escseq.arg[0]);
1177 break;
1178 case 'B': /* CUD -- Cursor <n> Down */
1179 DEFAULT(escseq.arg[0], 1);
1180 tmoveto(term.c.x, term.c.y+escseq.arg[0]);
1181 break;
1182 case 'C': /* CUF -- Cursor <n> Forward */
1183 case 'a':
1184 DEFAULT(escseq.arg[0], 1);
1185 tmoveto(term.c.x+escseq.arg[0], term.c.y);
1186 break;
1187 case 'D': /* CUB -- Cursor <n> Backward */
1188 DEFAULT(escseq.arg[0], 1);
1189 tmoveto(term.c.x-escseq.arg[0], term.c.y);
1190 break;
1191 case 'E': /* CNL -- Cursor <n> Down and first col */
1192 DEFAULT(escseq.arg[0], 1);
1193 tmoveto(0, term.c.y+escseq.arg[0]);
1194 break;
1195 case 'F': /* CPL -- Cursor <n> Up and first col */
1196 DEFAULT(escseq.arg[0], 1);
1197 tmoveto(0, term.c.y-escseq.arg[0]);
1198 break;
1199 case 'G': /* CHA -- Move to <col> */
1200 case '`': /* XXX: HPA -- same? */
1201 DEFAULT(escseq.arg[0], 1);
1202 tmoveto(escseq.arg[0]-1, term.c.y);
1203 break;
1204 case 'H': /* CUP -- Move to <row> <col> */
1205 case 'f': /* XXX: HVP -- same? */
1206 DEFAULT(escseq.arg[0], 1);
1207 DEFAULT(escseq.arg[1], 1);
1208 tmoveto(escseq.arg[1]-1, escseq.arg[0]-1);
1209 break;
1210 /* XXX: (CSI n I) CHT -- Cursor Forward Tabulation <n> tab stops */
1211 case 'J': /* ED -- Clear screen */
1212 sel.bx = -1;
1213 switch(escseq.arg[0]) {
1214 case 0: /* below */
1215 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1216 if(term.c.y < term.row-1)
1217 tclearregion(0, term.c.y+1, term.col-1, term.row-1);
1218 break;
1219 case 1: /* above */
1220 if(term.c.y > 1)
1221 tclearregion(0, 0, term.col-1, term.c.y-1);
1222 tclearregion(0, term.c.y, term.c.x, term.c.y);
1223 break;
1224 case 2: /* all */
1225 tclearregion(0, 0, term.col-1, term.row-1);
1226 break;
1227 default:
1228 goto unknown;
1229 }
1230 break;
1231 case 'K': /* EL -- Clear line */
1232 switch(escseq.arg[0]) {
1233 case 0: /* right */
1234 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1235 break;
1236 case 1: /* left */
1237 tclearregion(0, term.c.y, term.c.x, term.c.y);
1238 break;
1239 case 2: /* all */
1240 tclearregion(0, term.c.y, term.col-1, term.c.y);
1241 break;
1242 }
1243 break;
1244 case 'S': /* SU -- Scroll <n> line up */
1245 DEFAULT(escseq.arg[0], 1);
1246 tscrollup(term.top, escseq.arg[0]);
1247 break;
1248 case 'T': /* SD -- Scroll <n> line down */
1249 DEFAULT(escseq.arg[0], 1);
1250 tscrolldown(term.top, escseq.arg[0]);
1251 break;
1252 case 'L': /* IL -- Insert <n> blank lines */
1253 DEFAULT(escseq.arg[0], 1);
1254 tinsertblankline(escseq.arg[0]);
1255 break;
1256 case 'l': /* RM -- Reset Mode */
1257 if(escseq.priv) {
1258 switch(escseq.arg[0]) {
1259 case 1:
1260 term.mode &= ~MODE_APPKEYPAD;
1261 break;
1262 case 5: /* DECSCNM -- Remove reverse 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 12: /* att610 -- Stop blinking cursor (IGNORED) */
1272 break;
1273 case 20:
1274 term.mode &= ~MODE_CRLF;
1275 break;
1276 case 25:
1277 term.c.state |= CURSOR_HIDE;
1278 break;
1279 case 1000: /* disable X11 xterm mouse reporting */
1280 term.mode &= ~MODE_MOUSEBTN;
1281 break;
1282 case 1002:
1283 term.mode &= ~MODE_MOUSEMOTION;
1284 break;
1285 case 1049: /* = 1047 and 1048 */
1286 case 47:
1287 case 1047:
1288 if(IS_SET(MODE_ALTSCREEN)) {
1289 tclearregion(0, 0, term.col-1, term.row-1);
1290 tswapscreen();
1291 }
1292 if(escseq.arg[0] != 1049)
1293 break;
1294 case 1048:
1295 tcursor(CURSOR_LOAD);
1296 break;
1297 default:
1298 goto unknown;
1299 }
1300 } else {
1301 switch(escseq.arg[0]) {
1302 case 4:
1303 term.mode &= ~MODE_INSERT;
1304 break;
1305 default:
1306 goto unknown;
1307 }
1308 }
1309 break;
1310 case 'M': /* DL -- Delete <n> lines */
1311 DEFAULT(escseq.arg[0], 1);
1312 tdeleteline(escseq.arg[0]);
1313 break;
1314 case 'X': /* ECH -- Erase <n> char */
1315 DEFAULT(escseq.arg[0], 1);
1316 tclearregion(term.c.x, term.c.y, term.c.x + escseq.arg[0], term.c.y);
1317 break;
1318 case 'P': /* DCH -- Delete <n> char */
1319 DEFAULT(escseq.arg[0], 1);
1320 tdeletechar(escseq.arg[0]);
1321 break;
1322 /* XXX: (CSI n Z) CBT -- Cursor Backward Tabulation <n> tab stops */
1323 case 'd': /* VPA -- Move to <row> */
1324 DEFAULT(escseq.arg[0], 1);
1325 tmoveto(term.c.x, escseq.arg[0]-1);
1326 break;
1327 case 'h': /* SM -- Set terminal mode */
1328 if(escseq.priv) {
1329 switch(escseq.arg[0]) {
1330 case 1:
1331 term.mode |= MODE_APPKEYPAD;
1332 break;
1333 case 5: /* DECSCNM -- Reverve video */
1334 if(!IS_SET(MODE_REVERSE)) {
1335 term.mode |= MODE_REVERSE;
1336 draw();
1337 }
1338 break;
1339 case 7:
1340 term.mode |= MODE_WRAP;
1341 break;
1342 case 20:
1343 term.mode |= MODE_CRLF;
1344 break;
1345 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1346 /* fallthrough for xterm cvvis = CSI [ ? 12 ; 25 h */
1347 if(escseq.narg > 1 && escseq.arg[1] != 25)
1348 break;
1349 case 25:
1350 term.c.state &= ~CURSOR_HIDE;
1351 break;
1352 case 1000: /* 1000,1002: enable xterm mouse report */
1353 term.mode |= MODE_MOUSEBTN;
1354 break;
1355 case 1002:
1356 term.mode |= MODE_MOUSEMOTION;
1357 break;
1358 case 1049: /* = 1047 and 1048 */
1359 case 47:
1360 case 1047:
1361 if(IS_SET(MODE_ALTSCREEN))
1362 tclearregion(0, 0, term.col-1, term.row-1);
1363 else
1364 tswapscreen();
1365 if(escseq.arg[0] != 1049)
1366 break;
1367 case 1048:
1368 tcursor(CURSOR_SAVE);
1369 break;
1370 default: goto unknown;
1371 }
1372 } else {
1373 switch(escseq.arg[0]) {
1374 case 4:
1375 term.mode |= MODE_INSERT;
1376 break;
1377 default: goto unknown;
1378 }
1379 };
1380 break;
1381 case 'm': /* SGR -- Terminal attribute (color) */
1382 tsetattr(escseq.arg, escseq.narg);
1383 break;
1384 case 'r': /* DECSTBM -- Set Scrolling Region */
1385 if(escseq.priv)
1386 goto unknown;
1387 else {
1388 DEFAULT(escseq.arg[0], 1);
1389 DEFAULT(escseq.arg[1], term.row);
1390 tsetscroll(escseq.arg[0]-1, escseq.arg[1]-1);
1391 tmoveto(0, 0);
1392 }
1393 break;
1394 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1395 tcursor(CURSOR_SAVE);
1396 break;
1397 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1398 tcursor(CURSOR_LOAD);
1399 break;
1400 }
1401 }
1402
1403 void
1404 csidump(void) {
1405 int i;
1406 printf("ESC[");
1407 for(i = 0; i < escseq.len; i++) {
1408 uint c = escseq.buf[i] & 0xff;
1409 if(isprint(c)) putchar(c);
1410 else if(c == '\n') printf("(\\n)");
1411 else if(c == '\r') printf("(\\r)");
1412 else if(c == 0x1b) printf("(\\e)");
1413 else printf("(%02x)", c);
1414 }
1415 putchar('\n');
1416 }
1417
1418 void
1419 csireset(void) {
1420 memset(&escseq, 0, sizeof(escseq));
1421 }
1422
1423 void
1424 tputtab(void) {
1425 int space = TAB - term.c.x % TAB;
1426 tmoveto(term.c.x + space, term.c.y);
1427 }
1428
1429 void
1430 tputc(char *c) {
1431 char ascii = *c;
1432 if(term.esc & ESC_START) {
1433 if(term.esc & ESC_CSI) {
1434 escseq.buf[escseq.len++] = ascii;
1435 if(BETWEEN(ascii, 0x40, 0x7E) || escseq.len >= ESC_BUF_SIZ) {
1436 term.esc = 0;
1437 csiparse(), csihandle();
1438 }
1439 /* TODO: handle other OSC */
1440 } else if(term.esc & ESC_OSC) {
1441 if(ascii == ';') {
1442 term.titlelen = 0;
1443 term.esc = ESC_START | ESC_TITLE;
1444 }
1445 } else if(term.esc & ESC_TITLE) {
1446 if(ascii == '\a' || term.titlelen+1 >= ESC_TITLE_SIZ) {
1447 term.esc = 0;
1448 term.title[term.titlelen] = '\0';
1449 XStoreName(xw.dpy, xw.win, term.title);
1450 } else {
1451 term.title[term.titlelen++] = ascii;
1452 }
1453 } else if(term.esc & ESC_ALTCHARSET) {
1454 switch(ascii) {
1455 case '0': /* Line drawing crap */
1456 term.c.attr.mode |= ATTR_GFX;
1457 break;
1458 case 'B': /* Back to regular text */
1459 term.c.attr.mode &= ~ATTR_GFX;
1460 break;
1461 default:
1462 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
1463 }
1464 term.esc = 0;
1465 } else {
1466 switch(ascii) {
1467 case '[':
1468 term.esc |= ESC_CSI;
1469 break;
1470 case ']':
1471 term.esc |= ESC_OSC;
1472 break;
1473 case '(':
1474 term.esc |= ESC_ALTCHARSET;
1475 break;
1476 case 'D': /* IND -- Linefeed */
1477 if(term.c.y == term.bot)
1478 tscrollup(term.top, 1);
1479 else
1480 tmoveto(term.c.x, term.c.y+1);
1481 term.esc = 0;
1482 break;
1483 case 'E': /* NEL -- Next line */
1484 tnewline(1); /* always go to first col */
1485 term.esc = 0;
1486 break;
1487 case 'M': /* RI -- Reverse index */
1488 if(term.c.y == term.top)
1489 tscrolldown(term.top, 1);
1490 else
1491 tmoveto(term.c.x, term.c.y-1);
1492 term.esc = 0;
1493 break;
1494 case 'c': /* RIS -- Reset to inital state */
1495 treset();
1496 term.esc = 0;
1497 break;
1498 case '=': /* DECPAM -- Application keypad */
1499 term.mode |= MODE_APPKEYPAD;
1500 term.esc = 0;
1501 break;
1502 case '>': /* DECPNM -- Normal keypad */
1503 term.mode &= ~MODE_APPKEYPAD;
1504 term.esc = 0;
1505 break;
1506 case '7': /* DECSC -- Save Cursor */
1507 tcursor(CURSOR_SAVE);
1508 term.esc = 0;
1509 break;
1510 case '8': /* DECRC -- Restore Cursor */
1511 tcursor(CURSOR_LOAD);
1512 term.esc = 0;
1513 break;
1514 default:
1515 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
1516 (uchar) ascii, isprint(ascii)?ascii:'.');
1517 term.esc = 0;
1518 }
1519 }
1520 } else {
1521 if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
1522 sel.bx = -1;
1523 switch(ascii) {
1524 case '\t':
1525 tputtab();
1526 break;
1527 case '\b':
1528 tmoveto(term.c.x-1, term.c.y);
1529 break;
1530 case '\r':
1531 tmoveto(0, term.c.y);
1532 break;
1533 case '\f':
1534 case '\v':
1535 case '\n':
1536 /* go to first col if the mode is set */
1537 tnewline(IS_SET(MODE_CRLF));
1538 break;
1539 case '\a':
1540 if(!(xw.state & WIN_FOCUSED))
1541 xseturgency(1);
1542 break;
1543 case '\033':
1544 csireset();
1545 term.esc = ESC_START;
1546 break;
1547 default:
1548 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
1549 tnewline(1); /* always go to first col */
1550 tsetchar(c);
1551 if(term.c.x+1 < term.col)
1552 tmoveto(term.c.x+1, term.c.y);
1553 else
1554 term.c.state |= CURSOR_WRAPNEXT;
1555 }
1556 }
1557 }
1558
1559 int
1560 tresize(int col, int row) {
1561 int i, x;
1562 int minrow = MIN(row, term.row);
1563 int mincol = MIN(col, term.col);
1564 int slide = term.c.y - row + 1;
1565
1566 if(col < 1 || row < 1)
1567 return 0;
1568
1569 /* free unneeded rows */
1570 i = 0;
1571 if(slide > 0) {
1572 /* slide screen to keep cursor where we expect it -
1573 * tscrollup would work here, but we can optimize to
1574 * memmove because we're freeing the earlier lines */
1575 for(/* i = 0 */; i < slide; i++) {
1576 free(term.line[i]);
1577 free(term.alt[i]);
1578 }
1579 memmove(term.line, term.line + slide, row * sizeof(Line));
1580 memmove(term.alt, term.alt + slide, row * sizeof(Line));
1581 }
1582 for(i += row; i < term.row; i++) {
1583 free(term.line[i]);
1584 free(term.alt[i]);
1585 }
1586
1587 /* resize to new height */
1588 term.line = realloc(term.line, row * sizeof(Line));
1589 term.alt = realloc(term.alt, row * sizeof(Line));
1590 term.dirty = realloc(term.dirty, row * sizeof(*term.dirty));
1591
1592 /* resize each row to new width, zero-pad if needed */
1593 for(i = 0; i < minrow; i++) {
1594 term.dirty[i] = 1;
1595 term.line[i] = realloc(term.line[i], col * sizeof(Glyph));
1596 term.alt[i] = realloc(term.alt[i], col * sizeof(Glyph));
1597 for(x = mincol; x < col; x++) {
1598 term.line[i][x].state = 0;
1599 term.alt[i][x].state = 0;
1600 }
1601 }
1602
1603 /* allocate any new rows */
1604 for(/* i == minrow */; i < row; i++) {
1605 term.dirty[i] = 1;
1606 term.line[i] = calloc(col, sizeof(Glyph));
1607 term.alt [i] = calloc(col, sizeof(Glyph));
1608 }
1609
1610 /* update terminal size */
1611 term.col = col, term.row = row;
1612 /* make use of the LIMIT in tmoveto */
1613 tmoveto(term.c.x, term.c.y);
1614 /* reset scrolling region */
1615 tsetscroll(0, row-1);
1616
1617 return (slide > 0);
1618 }
1619
1620 void
1621 xresize(int col, int row) {
1622 xw.w = MAX(1, 2*BORDER + col * xw.cw);
1623 xw.h = MAX(1, 2*BORDER + row * xw.ch);
1624 }
1625
1626 void
1627 xloadcols(void) {
1628 int i, r, g, b;
1629 XColor color;
1630 ulong white = WhitePixel(xw.dpy, xw.scr);
1631
1632 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
1633 for(i = 0; i < LEN(colorname); i++) {
1634 if(!colorname[i])
1635 continue;
1636 if(!XAllocNamedColor(xw.dpy, xw.cmap, colorname[i], &color, &color)) {
1637 dc.col[i] = white;
1638 fprintf(stderr, "Could not allocate color '%s'\n", colorname[i]);
1639 } else
1640 dc.col[i] = color.pixel;
1641 }
1642
1643 /* load colors [16-255] ; same colors as xterm */
1644 for(i = 16, r = 0; r < 6; r++)
1645 for(g = 0; g < 6; g++)
1646 for(b = 0; b < 6; b++) {
1647 color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
1648 color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
1649 color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
1650 if(!XAllocColor(xw.dpy, xw.cmap, &color)) {
1651 dc.col[i] = white;
1652 fprintf(stderr, "Could not allocate color %d\n", i);
1653 } else
1654 dc.col[i] = color.pixel;
1655 i++;
1656 }
1657
1658 for(r = 0; r < 24; r++, i++) {
1659 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
1660 if (!XAllocColor(xw.dpy, xw.cmap, &color)) {
1661 dc.col[i] = white;
1662 fprintf(stderr, "Could not allocate color %d\n", i);
1663 } else
1664 dc.col[i] = color.pixel;
1665 }
1666 }
1667
1668 void
1669 xclear(int x1, int y1, int x2, int y2) {
1670 XSetForeground(xw.dpy, dc.gc, dc.col[IS_SET(MODE_REVERSE) ? DefaultFG : DefaultBG]);
1671 XFillRectangle(xw.dpy, xw.buf, dc.gc,
1672 BORDER + x1 * xw.cw, BORDER + y1 * xw.ch,
1673 (x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch);
1674 }
1675
1676 void
1677 xhints(void) {
1678 XClassHint class = {opt_class ? opt_class : TNAME, TNAME};
1679 XWMHints wm = {.flags = InputHint, .input = 1};
1680 XSizeHints size = {
1681 .flags = PSize | PResizeInc | PBaseSize,
1682 .height = xw.h,
1683 .width = xw.w,
1684 .height_inc = xw.ch,
1685 .width_inc = xw.cw,
1686 .base_height = 2*BORDER,
1687 .base_width = 2*BORDER,
1688 };
1689 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, &size, &wm, &class);
1690 }
1691
1692 XFontSet
1693 xinitfont(char *fontstr) {
1694 XFontSet set;
1695 char *def, **missing;
1696 int n;
1697
1698 missing = NULL;
1699 set = XCreateFontSet(xw.dpy, fontstr, &missing, &n, &def);
1700 if(missing) {
1701 while(n--)
1702 fprintf(stderr, "st: missing fontset: %s\n", missing[n]);
1703 XFreeStringList(missing);
1704 }
1705 return set;
1706 }
1707
1708 void
1709 xgetfontinfo(XFontSet set, int *ascent, int *descent, short *lbearing, short *rbearing) {
1710 XFontStruct **xfonts;
1711 char **font_names;
1712 int i, n;
1713
1714 *ascent = *descent = *lbearing = *rbearing = 0;
1715 n = XFontsOfFontSet(set, &xfonts, &font_names);
1716 for(i = 0; i < n; i++) {
1717 *ascent = MAX(*ascent, (*xfonts)->ascent);
1718 *descent = MAX(*descent, (*xfonts)->descent);
1719 *lbearing = MAX(*lbearing, (*xfonts)->min_bounds.lbearing);
1720 *rbearing = MAX(*rbearing, (*xfonts)->max_bounds.rbearing);
1721 xfonts++;
1722 }
1723 }
1724
1725 void
1726 initfonts(char *fontstr, char *bfontstr) {
1727 if((dc.font.set = xinitfont(fontstr)) == NULL ||
1728 (dc.bfont.set = xinitfont(bfontstr)) == NULL)
1729 die("Can't load font %s\n", dc.font.set ? BOLDFONT : FONT);
1730 xgetfontinfo(dc.font.set, &dc.font.ascent, &dc.font.descent,
1731 &dc.font.lbearing, &dc.font.rbearing);
1732 xgetfontinfo(dc.bfont.set, &dc.bfont.ascent, &dc.bfont.descent,
1733 &dc.bfont.lbearing, &dc.bfont.rbearing);
1734 }
1735
1736 void
1737 xinit(void) {
1738 XSetWindowAttributes attrs;
1739 Cursor cursor;
1740 Window parent;
1741
1742 if(!(xw.dpy = XOpenDisplay(NULL)))
1743 die("Can't open display\n");
1744 xw.scr = XDefaultScreen(xw.dpy);
1745
1746 /* font */
1747 initfonts(FONT, BOLDFONT);
1748
1749 /* XXX: Assuming same size for bold font */
1750 xw.cw = dc.font.rbearing - dc.font.lbearing;
1751 xw.ch = dc.font.ascent + dc.font.descent;
1752
1753 /* colors */
1754 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
1755 xloadcols();
1756
1757 /* window - default size */
1758 xw.h = 2*BORDER + term.row * xw.ch;
1759 xw.w = 2*BORDER + term.col * xw.cw;
1760
1761 attrs.background_pixel = dc.col[DefaultBG];
1762 attrs.border_pixel = dc.col[DefaultBG];
1763 attrs.bit_gravity = NorthWestGravity;
1764 attrs.event_mask = FocusChangeMask | KeyPressMask
1765 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
1766 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask
1767 | EnterWindowMask | LeaveWindowMask;
1768 attrs.colormap = xw.cmap;
1769
1770 parent = opt_embed ? strtol(opt_embed, NULL, 0) : XRootWindow(xw.dpy, xw.scr);
1771 xw.win = XCreateWindow(xw.dpy, parent, 0, 0,
1772 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
1773 XDefaultVisual(xw.dpy, xw.scr),
1774 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
1775 | CWColormap,
1776 &attrs);
1777 xw.buf = XdbeAllocateBackBufferName(xw.dpy, xw.win, XdbeCopied);
1778
1779
1780 /* input methods */
1781 xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL);
1782 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
1783 | XIMStatusNothing, XNClientWindow, xw.win,
1784 XNFocusWindow, xw.win, NULL);
1785 /* gc */
1786 dc.gc = XCreateGC(xw.dpy, xw.win, 0, NULL);
1787
1788 /* white cursor, black outline */
1789 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
1790 XDefineCursor(xw.dpy, xw.win, cursor);
1791 XRecolorCursor(xw.dpy, cursor,
1792 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
1793 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
1794
1795 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
1796
1797 XStoreName(xw.dpy, xw.win, opt_title ? opt_title : "st");
1798 XMapWindow(xw.dpy, xw.win);
1799 xhints();
1800 XSync(xw.dpy, 0);
1801 }
1802
1803 void
1804 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
1805 int fg = base.fg, bg = base.bg, temp;
1806 int winx = BORDER+x*xw.cw, winy = BORDER+y*xw.ch + dc.font.ascent, width = charlen*xw.cw;
1807 XFontSet fontset = dc.font.set;
1808 int i;
1809
1810 /* only switch default fg/bg if term is in RV mode */
1811 if(IS_SET(MODE_REVERSE)) {
1812 if(fg == DefaultFG)
1813 fg = DefaultBG;
1814 if(bg == DefaultBG)
1815 bg = DefaultFG;
1816 }
1817
1818 if(base.mode & ATTR_REVERSE)
1819 temp = fg, fg = bg, bg = temp;
1820
1821 if(base.mode & ATTR_BOLD) {
1822 fg += 8;
1823 fontset = dc.bfont.set;
1824 }
1825
1826 XSetBackground(xw.dpy, dc.gc, dc.col[bg]);
1827 XSetForeground(xw.dpy, dc.gc, dc.col[fg]);
1828
1829 if(base.mode & ATTR_GFX) {
1830 for(i = 0; i < bytelen; i++) {
1831 char c = gfx[(uint)s[i] % 256];
1832 if(c)
1833 s[i] = c;
1834 else if(s[i] > 0x5f)
1835 s[i] -= 0x5f;
1836 }
1837 }
1838
1839 XmbDrawImageString(xw.dpy, xw.buf, fontset, dc.gc, winx, winy, s, bytelen);
1840
1841 if(base.mode & ATTR_UNDERLINE)
1842 XDrawLine(xw.dpy, xw.buf, dc.gc, winx, winy+1, winx+width-1, winy+1);
1843 }
1844
1845 /* copy buffer pixmap to screen pixmap */
1846 void
1847 xcopy() {
1848 XdbeSwapInfo swpinfo[1] = {{xw.win, XdbeCopied}};
1849 XdbeSwapBuffers(xw.dpy, swpinfo, 1);
1850
1851 }
1852
1853 void
1854 xdrawcursor(void) {
1855 static int oldx = 0;
1856 static int oldy = 0;
1857 int sl;
1858 Glyph g = {{' '}, ATTR_NULL, DefaultBG, DefaultCS, 0};
1859
1860 LIMIT(oldx, 0, term.col-1);
1861 LIMIT(oldy, 0, term.row-1);
1862
1863 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
1864 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
1865
1866 /* remove the old cursor */
1867 if(term.line[oldy][oldx].state & GLYPH_SET) {
1868 sl = utf8size(term.line[oldy][oldx].c);
1869 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx, oldy, 1, sl);
1870 } else
1871 xclear(oldx, oldy, oldx, oldy);
1872
1873 xcopy(oldx, oldy, 1, 1);
1874
1875 /* draw the new one */
1876 if(!(term.c.state & CURSOR_HIDE)) {
1877 if(!(xw.state & WIN_FOCUSED))
1878 g.bg = DefaultUCS;
1879
1880 if(IS_SET(MODE_REVERSE))
1881 g.mode |= ATTR_REVERSE, g.fg = DefaultCS, g.bg = DefaultFG;
1882
1883 sl = utf8size(g.c);
1884 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
1885 oldx = term.c.x, oldy = term.c.y;
1886 }
1887
1888 xcopy(term.c.x, term.c.y, 1, 1);
1889 }
1890
1891 void
1892 draw() {
1893 drawregion(0, 0, term.col, term.row);
1894 xcopy();
1895 gettimeofday(&xw.lastdraw, NULL);
1896 }
1897
1898 void
1899 drawregion(int x1, int y1, int x2, int y2) {
1900 int ic, ib, x, y, ox, sl;
1901 Glyph base, new;
1902 char buf[DRAW_BUF_SIZ];
1903
1904 if(!(xw.state & WIN_VISIBLE))
1905 return;
1906
1907 for(y = y1; y < y2; y++) {
1908 if(!term.dirty[y])
1909 continue;
1910 xclear(0, y, term.col, y);
1911 term.dirty[y] = 0;
1912 base = term.line[y][0];
1913 ic = ib = ox = 0;
1914 for(x = x1; x < x2; x++) {
1915 new = term.line[y][x];
1916 if(sel.bx != -1 && *(new.c) && selected(x, y))
1917 new.mode ^= ATTR_REVERSE;
1918 if(ib > 0 && (!(new.state & GLYPH_SET) || ATTRCMP(base, new) ||
1919 ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
1920 xdraws(buf, base, ox, y, ic, ib);
1921 ic = ib = 0;
1922 }
1923 if(new.state & GLYPH_SET) {
1924 if(ib == 0) {
1925 ox = x;
1926 base = new;
1927 }
1928 sl = utf8size(new.c);
1929 memcpy(buf+ib, new.c, sl);
1930 ib += sl;
1931 ++ic;
1932 }
1933 }
1934 if(ib > 0)
1935 xdraws(buf, base, ox, y, ic, ib);
1936 }
1937 xdrawcursor();
1938 }
1939
1940 void
1941 expose(XEvent *ev) {
1942 XExposeEvent *e = &ev->xexpose;
1943 if(xw.state & WIN_REDRAW) {
1944 if(!e->count)
1945 xw.state &= ~WIN_REDRAW;
1946 }
1947 xcopy();
1948 }
1949
1950 void
1951 visibility(XEvent *ev) {
1952 XVisibilityEvent *e = &ev->xvisibility;
1953 if(e->state == VisibilityFullyObscured)
1954 xw.state &= ~WIN_VISIBLE;
1955 else if(!(xw.state & WIN_VISIBLE))
1956 /* need a full redraw for next Expose, not just a buf copy */
1957 xw.state |= WIN_VISIBLE | WIN_REDRAW;
1958 }
1959
1960 void
1961 unmap(XEvent *ev) {
1962 xw.state &= ~WIN_VISIBLE;
1963 }
1964
1965 void
1966 xseturgency(int add) {
1967 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
1968 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
1969 XSetWMHints(xw.dpy, xw.win, h);
1970 XFree(h);
1971 }
1972
1973 void
1974 focus(XEvent *ev) {
1975 if(ev->type == FocusIn) {
1976 xw.state |= WIN_FOCUSED;
1977 xseturgency(0);
1978 } else
1979 xw.state &= ~WIN_FOCUSED;
1980 draw();
1981 }
1982
1983 char*
1984 kmap(KeySym k, uint state) {
1985 int i;
1986 state &= ~Mod2Mask;
1987 for(i = 0; i < LEN(key); i++) {
1988 uint mask = key[i].mask;
1989 if(key[i].k == k && ((state & mask) == mask || (mask == XK_NO_MOD && !state)))
1990 return (char*)key[i].s;
1991 }
1992 return NULL;
1993 }
1994
1995 void
1996 kpress(XEvent *ev) {
1997 XKeyEvent *e = &ev->xkey;
1998 KeySym ksym;
1999 char buf[32];
2000 char *customkey;
2001 int len;
2002 int meta;
2003 int shift;
2004 Status status;
2005
2006 meta = e->state & Mod1Mask;
2007 shift = e->state & ShiftMask;
2008 len = XmbLookupString(xw.xic, e, buf, sizeof(buf), &ksym, &status);
2009
2010 /* 1. custom keys from config.h */
2011 if((customkey = kmap(ksym, e->state)))
2012 ttywrite(customkey, strlen(customkey));
2013 /* 2. hardcoded (overrides X lookup) */
2014 else
2015 switch(ksym) {
2016 case XK_Up:
2017 case XK_Down:
2018 case XK_Left:
2019 case XK_Right:
2020 /* XXX: shift up/down doesn't work */
2021 sprintf(buf, "\033%c%c", IS_SET(MODE_APPKEYPAD) ? 'O' : '[', (shift ? "dacb":"DACB")[ksym - XK_Left]);
2022 ttywrite(buf, 3);
2023 break;
2024 case XK_Insert:
2025 if(shift)
2026 selpaste();
2027 break;
2028 case XK_Return:
2029 if(IS_SET(MODE_CRLF))
2030 ttywrite("\r\n", 2);
2031 else
2032 ttywrite("\r", 1);
2033 break;
2034 /* 3. X lookup */
2035 default:
2036 if(len > 0) {
2037 if(meta && len == 1)
2038 ttywrite("\033", 1);
2039 ttywrite(buf, len);
2040 }
2041 break;
2042 }
2043 }
2044
2045 void
2046 cmessage(XEvent *e) {
2047 /* See xembed specs
2048 http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html */
2049 if (e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
2050 if (e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
2051 xw.state |= WIN_FOCUSED;
2052 xseturgency(0);
2053 } else if (e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
2054 xw.state &= ~WIN_FOCUSED;
2055 }
2056 draw();
2057 }
2058 }
2059
2060 void
2061 resize(XEvent *e) {
2062 int col, row;
2063
2064 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
2065 return;
2066
2067 xw.w = e->xconfigure.width;
2068 xw.h = e->xconfigure.height;
2069 col = (xw.w - 2*BORDER) / xw.cw;
2070 row = (xw.h - 2*BORDER) / xw.ch;
2071 if(col == term.col && row == term.row)
2072 return;
2073 if(tresize(col, row))
2074 draw();
2075 ttyresize(col, row);
2076 xresize(col, row);
2077 }
2078
2079 bool
2080 last_draw_too_old(void) {
2081 struct timeval now;
2082 gettimeofday(&now, NULL);
2083 return TIMEDIFF(now, xw.lastdraw) >= DRAW_TIMEOUT/1000;
2084 }
2085
2086 void
2087 run(void) {
2088 XEvent ev;
2089 fd_set rfd;
2090 int xfd = XConnectionNumber(xw.dpy);
2091 struct timeval timeout = {0};
2092 bool stuff_to_print = 0;
2093
2094 for(;;) {
2095 FD_ZERO(&rfd);
2096 FD_SET(cmdfd, &rfd);
2097 FD_SET(xfd, &rfd);
2098 timeout.tv_sec = 0;
2099 timeout.tv_usec = SELECT_TIMEOUT;
2100 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, &timeout) < 0) {
2101 if(errno == EINTR)
2102 continue;
2103 die("select failed: %s\n", SERRNO);
2104 }
2105 if(FD_ISSET(cmdfd, &rfd)) {
2106 ttyread();
2107 stuff_to_print = 1;
2108 }
2109
2110 if(stuff_to_print && last_draw_too_old()) {
2111 stuff_to_print = 0;
2112 draw();
2113 }
2114
2115 while(XPending(xw.dpy)) {
2116 XNextEvent(xw.dpy, &ev);
2117 if(XFilterEvent(&ev, xw.win))
2118 continue;
2119 if(handler[ev.type])
2120 (handler[ev.type])(&ev);
2121 }
2122 }
2123 }
2124
2125 int
2126 main(int argc, char *argv[]) {
2127 int i;
2128
2129 for(i = 1; i < argc; i++) {
2130 switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
2131 case 't':
2132 if(++i < argc) opt_title = argv[i];
2133 break;
2134 case 'c':
2135 if(++i < argc) opt_class = argv[i];
2136 break;
2137 case 'w':
2138 if(++i < argc) opt_embed = argv[i];
2139 break;
2140 case 'e':
2141 /* eat every remaining arguments */
2142 if(++i < argc) opt_cmd = &argv[i];
2143 goto run;
2144 case 'v':
2145 default:
2146 die(USAGE);
2147 }
2148 }
2149
2150 run:
2151 setlocale(LC_CTYPE, "");
2152 tnew(80, 24);
2153 ttynew();
2154 xinit();
2155 selinit();
2156 run();
2157 return 0;
2158 }