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Move unsupported sequences to ignored.
[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 <pwd.h>
9 #include <stdarg.h>
10 #include <stdbool.h>
11 #include <stdio.h>
12 #include <stdlib.h>
13 #include <string.h>
14 #include <signal.h>
15 #include <sys/ioctl.h>
16 #include <sys/select.h>
17 #include <sys/stat.h>
18 #include <sys/time.h>
19 #include <sys/types.h>
20 #include <sys/wait.h>
21 #include <time.h>
22 #include <unistd.h>
23 #include <X11/Xatom.h>
24 #include <X11/Xlib.h>
25 #include <X11/Xutil.h>
26 #include <X11/cursorfont.h>
27 #include <X11/keysym.h>
28 #include <X11/extensions/Xdbe.h>
29 #include <X11/Xft/Xft.h>
30 #include <fontconfig/fontconfig.h>
31 #define Glyph Glyph_
32 #define Font Font_
33
34 #if defined(__linux)
35 #include <pty.h>
36 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
37 #include <util.h>
38 #elif defined(__FreeBSD__) || defined(__DragonFly__)
39 #include <libutil.h>
40 #endif
41
42 #define USAGE \
43 "st " VERSION " (c) 2010-2012 st engineers\n" \
44 "usage: st [-v] [-c class] [-f font] [-g geometry] [-o file]" \
45 " [-t title] [-w windowid] [-e command ...]\n"
46
47 /* XEMBED messages */
48 #define XEMBED_FOCUS_IN 4
49 #define XEMBED_FOCUS_OUT 5
50
51 /* Arbitrary sizes */
52 #define ESC_BUF_SIZ 256
53 #define ESC_ARG_SIZ 16
54 #define STR_BUF_SIZ 256
55 #define STR_ARG_SIZ 16
56 #define DRAW_BUF_SIZ 20*1024
57 #define UTF_SIZ 4
58 #define XK_NO_MOD UINT_MAX
59 #define XK_ANY_MOD 0
60
61 #define REDRAW_TIMEOUT (80*1000) /* 80 ms */
62
63 /* macros */
64 #define CLEANMASK(mask) (mask & (ShiftMask|ControlMask|Mod1Mask|Mod2Mask|Mod3Mask|Mod4Mask|Mod5Mask))
65 #define SERRNO strerror(errno)
66 #define MIN(a, b) ((a) < (b) ? (a) : (b))
67 #define MAX(a, b) ((a) < (b) ? (b) : (a))
68 #define LEN(a) (sizeof(a) / sizeof(a[0]))
69 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
70 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
71 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
72 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
73 #define IS_SET(flag) (term.mode & (flag))
74 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_usec-t2.tv_usec)/1000)
75
76 #define VT102ID "\033[?6c"
77
78 enum glyph_attribute {
79 ATTR_NULL = 0,
80 ATTR_REVERSE = 1,
81 ATTR_UNDERLINE = 2,
82 ATTR_BOLD = 4,
83 ATTR_GFX = 8,
84 ATTR_ITALIC = 16,
85 ATTR_BLINK = 32,
86 };
87
88 enum cursor_movement {
89 CURSOR_UP,
90 CURSOR_DOWN,
91 CURSOR_LEFT,
92 CURSOR_RIGHT,
93 CURSOR_SAVE,
94 CURSOR_LOAD
95 };
96
97 enum cursor_state {
98 CURSOR_DEFAULT = 0,
99 CURSOR_WRAPNEXT = 1,
100 CURSOR_ORIGIN = 2
101 };
102
103 enum glyph_state {
104 GLYPH_SET = 1,
105 GLYPH_DIRTY = 2
106 };
107
108 enum term_mode {
109 MODE_WRAP = 1,
110 MODE_INSERT = 2,
111 MODE_APPKEYPAD = 4,
112 MODE_ALTSCREEN = 8,
113 MODE_CRLF = 16,
114 MODE_MOUSEBTN = 32,
115 MODE_MOUSEMOTION = 64,
116 MODE_MOUSE = 32|64,
117 MODE_REVERSE = 128,
118 MODE_KBDLOCK = 256,
119 MODE_HIDE = 512
120 };
121
122 enum escape_state {
123 ESC_START = 1,
124 ESC_CSI = 2,
125 ESC_STR = 4, /* DSC, OSC, PM, APC */
126 ESC_ALTCHARSET = 8,
127 ESC_STR_END = 16, /* a final string was encountered */
128 ESC_TEST = 32, /* Enter in test mode */
129 };
130
131 enum window_state {
132 WIN_VISIBLE = 1,
133 WIN_REDRAW = 2,
134 WIN_FOCUSED = 4
135 };
136
137 /* bit macro */
138 #undef B0
139 enum { B0=1, B1=2, B2=4, B3=8, B4=16, B5=32, B6=64, B7=128 };
140
141 typedef unsigned char uchar;
142 typedef unsigned int uint;
143 typedef unsigned long ulong;
144 typedef unsigned short ushort;
145
146 typedef struct {
147 char c[UTF_SIZ]; /* character code */
148 uchar mode; /* attribute flags */
149 ushort fg; /* foreground */
150 ushort bg; /* background */
151 uchar state; /* state flags */
152 } Glyph;
153
154 typedef Glyph* Line;
155
156 typedef struct {
157 Glyph attr; /* current char attributes */
158 int x;
159 int y;
160 char state;
161 } TCursor;
162
163 /* CSI Escape sequence structs */
164 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
165 typedef struct {
166 char buf[ESC_BUF_SIZ]; /* raw string */
167 int len; /* raw string length */
168 char priv;
169 int arg[ESC_ARG_SIZ];
170 int narg; /* nb of args */
171 char mode;
172 } CSIEscape;
173
174 /* STR Escape sequence structs */
175 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
176 typedef struct {
177 char type; /* ESC type ... */
178 char buf[STR_BUF_SIZ]; /* raw string */
179 int len; /* raw string length */
180 char *args[STR_ARG_SIZ];
181 int narg; /* nb of args */
182 } STREscape;
183
184 /* Internal representation of the screen */
185 typedef struct {
186 int row; /* nb row */
187 int col; /* nb col */
188 Line *line; /* screen */
189 Line *alt; /* alternate screen */
190 bool *dirty; /* dirtyness of lines */
191 TCursor c; /* cursor */
192 int top; /* top scroll limit */
193 int bot; /* bottom scroll limit */
194 int mode; /* terminal mode flags */
195 int esc; /* escape state flags */
196 bool *tabs;
197 } Term;
198
199 /* Purely graphic info */
200 typedef struct {
201 Display* dpy;
202 Colormap cmap;
203 Window win;
204 XdbeBackBuffer buf;
205 Atom xembed, wmdeletewin;
206 XIM xim;
207 XIC xic;
208 XftDraw *xft_draw;
209 Visual *vis;
210 int scr;
211 bool isfixed; /* is fixed geometry? */
212 int fx, fy, fw, fh; /* fixed geometry */
213 int tw, th; /* tty width and height */
214 int w; /* window width */
215 int h; /* window height */
216 int ch; /* char height */
217 int cw; /* char width */
218 char state; /* focus, redraw, visible */
219 } XWindow;
220
221 typedef struct {
222 KeySym k;
223 uint mask;
224 char s[ESC_BUF_SIZ];
225 } Key;
226
227 /* TODO: use better name for vars... */
228 typedef struct {
229 int mode;
230 int bx, by;
231 int ex, ey;
232 struct {
233 int x, y;
234 } b, e;
235 char *clip;
236 Atom xtarget;
237 bool alt;
238 struct timeval tclick1;
239 struct timeval tclick2;
240 } Selection;
241
242 typedef union {
243 int i;
244 unsigned int ui;
245 float f;
246 const void *v;
247 } Arg;
248
249 typedef struct {
250 unsigned int mod;
251 KeySym keysym;
252 void (*func)(const Arg *);
253 const Arg arg;
254 } Shortcut;
255
256 /* function definitions used in config.h */
257 static void xzoom(const Arg *);
258
259 /* Config.h for applying patches and the configuration. */
260 #include "config.h"
261
262 /* Font structure */
263 typedef struct {
264 int height;
265 int width;
266 int ascent;
267 int descent;
268 short lbearing;
269 short rbearing;
270 XftFont *xft_set;
271 } Font;
272
273 /* Drawing Context */
274 typedef struct {
275 XftColor xft_col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
276 GC gc;
277 Font font, bfont, ifont, ibfont;
278 } DC;
279
280 static void die(const char *, ...);
281 static void draw(void);
282 static void redraw(void);
283 static void drawregion(int, int, int, int);
284 static void execsh(void);
285 static void sigchld(int);
286 static void run(void);
287
288 static void csidump(void);
289 static void csihandle(void);
290 static void csiparse(void);
291 static void csireset(void);
292 static void strdump(void);
293 static void strhandle(void);
294 static void strparse(void);
295 static void strreset(void);
296
297 static void tclearregion(int, int, int, int);
298 static void tcursor(int);
299 static void tdeletechar(int);
300 static void tdeleteline(int);
301 static void tinsertblank(int);
302 static void tinsertblankline(int);
303 static void tmoveto(int, int);
304 static void tmoveato(int x, int y);
305 static void tnew(int, int);
306 static void tnewline(int);
307 static void tputtab(bool);
308 static void tputc(char *, int);
309 static void treset(void);
310 static int tresize(int, int);
311 static void tscrollup(int, int);
312 static void tscrolldown(int, int);
313 static void tsetattr(int*, int);
314 static void tsetchar(char *, Glyph *, int, int);
315 static void tsetscroll(int, int);
316 static void tswapscreen(void);
317 static void tsetdirt(int, int);
318 static void tsetmode(bool, bool, int *, int);
319 static void tfulldirt(void);
320
321 static void ttynew(void);
322 static void ttyread(void);
323 static void ttyresize(void);
324 static void ttywrite(const char *, size_t);
325
326 static void xdraws(char *, Glyph, int, int, int, int);
327 static void xhints(void);
328 static void xclear(int, int, int, int);
329 static void xdrawcursor(void);
330 static void xinit(void);
331 static void xloadcols(void);
332 static void xresettitle(void);
333 static void xseturgency(int);
334 static void xsetsel(char*);
335 static void xtermclear(int, int, int, int);
336 static void xresize(int, int);
337
338 static void expose(XEvent *);
339 static void visibility(XEvent *);
340 static void unmap(XEvent *);
341 static char *kmap(KeySym, uint);
342 static void kpress(XEvent *);
343 static void cmessage(XEvent *);
344 static void cresize(int width, int height);
345 static void resize(XEvent *);
346 static void focus(XEvent *);
347 static void brelease(XEvent *);
348 static void bpress(XEvent *);
349 static void bmotion(XEvent *);
350 static void selnotify(XEvent *);
351 static void selclear(XEvent *);
352 static void selrequest(XEvent *);
353
354 static void selinit(void);
355 static inline bool selected(int, int);
356 static void selcopy(void);
357 static void selpaste(void);
358 static void selscroll(int, int);
359
360 static int utf8decode(char *, long *);
361 static int utf8encode(long *, char *);
362 static int utf8size(char *);
363 static int isfullutf8(char *, int);
364
365 static ssize_t xwrite(int, char *, size_t);
366 static void *xmalloc(size_t);
367 static void *xrealloc(void *, size_t);
368 static void *xcalloc(size_t nmemb, size_t size);
369
370 static void (*handler[LASTEvent])(XEvent *) = {
371 [KeyPress] = kpress,
372 [ClientMessage] = cmessage,
373 [ConfigureNotify] = resize,
374 [VisibilityNotify] = visibility,
375 [UnmapNotify] = unmap,
376 [Expose] = expose,
377 [FocusIn] = focus,
378 [FocusOut] = focus,
379 [MotionNotify] = bmotion,
380 [ButtonPress] = bpress,
381 [ButtonRelease] = brelease,
382 [SelectionClear] = selclear,
383 [SelectionNotify] = selnotify,
384 [SelectionRequest] = selrequest,
385 };
386
387 /* Globals */
388 static DC dc;
389 static XWindow xw;
390 static Term term;
391 static CSIEscape csiescseq;
392 static STREscape strescseq;
393 static int cmdfd;
394 static pid_t pid;
395 static Selection sel;
396 static int iofd = -1;
397 static char **opt_cmd = NULL;
398 static char *opt_io = NULL;
399 static char *opt_title = NULL;
400 static char *opt_embed = NULL;
401 static char *opt_class = NULL;
402 static char *opt_font = NULL;
403
404 static char *usedfont = NULL;
405 static int usedfontsize = 0;
406
407 ssize_t
408 xwrite(int fd, char *s, size_t len) {
409 size_t aux = len;
410
411 while(len > 0) {
412 ssize_t r = write(fd, s, len);
413 if(r < 0)
414 return r;
415 len -= r;
416 s += r;
417 }
418 return aux;
419 }
420
421 void *
422 xmalloc(size_t len) {
423 void *p = malloc(len);
424
425 if(!p)
426 die("Out of memory\n");
427
428 return p;
429 }
430
431 void *
432 xrealloc(void *p, size_t len) {
433 if((p = realloc(p, len)) == NULL)
434 die("Out of memory\n");
435
436 return p;
437 }
438
439 void *
440 xcalloc(size_t nmemb, size_t size) {
441 void *p = calloc(nmemb, size);
442
443 if(!p)
444 die("Out of memory\n");
445
446 return p;
447 }
448
449 int
450 utf8decode(char *s, long *u) {
451 uchar c;
452 int i, n, rtn;
453
454 rtn = 1;
455 c = *s;
456 if(~c & B7) { /* 0xxxxxxx */
457 *u = c;
458 return rtn;
459 } else if((c & (B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */
460 *u = c&(B4|B3|B2|B1|B0);
461 n = 1;
462 } else if((c & (B7|B6|B5|B4)) == (B7|B6|B5)) { /* 1110xxxx */
463 *u = c&(B3|B2|B1|B0);
464 n = 2;
465 } else if((c & (B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) { /* 11110xxx */
466 *u = c & (B2|B1|B0);
467 n = 3;
468 } else {
469 goto invalid;
470 }
471
472 for(i = n, ++s; i > 0; --i, ++rtn, ++s) {
473 c = *s;
474 if((c & (B7|B6)) != B7) /* 10xxxxxx */
475 goto invalid;
476 *u <<= 6;
477 *u |= c & (B5|B4|B3|B2|B1|B0);
478 }
479
480 if((n == 1 && *u < 0x80) ||
481 (n == 2 && *u < 0x800) ||
482 (n == 3 && *u < 0x10000) ||
483 (*u >= 0xD800 && *u <= 0xDFFF)) {
484 goto invalid;
485 }
486
487 return rtn;
488 invalid:
489 *u = 0xFFFD;
490
491 return rtn;
492 }
493
494 int
495 utf8encode(long *u, char *s) {
496 uchar *sp;
497 ulong uc;
498 int i, n;
499
500 sp = (uchar *)s;
501 uc = *u;
502 if(uc < 0x80) {
503 *sp = uc; /* 0xxxxxxx */
504 return 1;
505 } else if(*u < 0x800) {
506 *sp = (uc >> 6) | (B7|B6); /* 110xxxxx */
507 n = 1;
508 } else if(uc < 0x10000) {
509 *sp = (uc >> 12) | (B7|B6|B5); /* 1110xxxx */
510 n = 2;
511 } else if(uc <= 0x10FFFF) {
512 *sp = (uc >> 18) | (B7|B6|B5|B4); /* 11110xxx */
513 n = 3;
514 } else {
515 goto invalid;
516 }
517
518 for(i=n,++sp; i>0; --i,++sp)
519 *sp = ((uc >> 6*(i-1)) & (B5|B4|B3|B2|B1|B0)) | B7; /* 10xxxxxx */
520
521 return n+1;
522 invalid:
523 /* U+FFFD */
524 *s++ = '\xEF';
525 *s++ = '\xBF';
526 *s = '\xBD';
527
528 return 3;
529 }
530
531 /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
532 UTF-8 otherwise return 0 */
533 int
534 isfullutf8(char *s, int b) {
535 uchar *c1, *c2, *c3;
536
537 c1 = (uchar *)s;
538 c2 = (uchar *)++s;
539 c3 = (uchar *)++s;
540 if(b < 1) {
541 return 0;
542 } else if((*c1&(B7|B6|B5)) == (B7|B6) && b == 1) {
543 return 0;
544 } else if((*c1&(B7|B6|B5|B4)) == (B7|B6|B5) &&
545 ((b == 1) ||
546 ((b == 2) && (*c2&(B7|B6)) == B7))) {
547 return 0;
548 } else if((*c1&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4) &&
549 ((b == 1) ||
550 ((b == 2) && (*c2&(B7|B6)) == B7) ||
551 ((b == 3) && (*c2&(B7|B6)) == B7 && (*c3&(B7|B6)) == B7))) {
552 return 0;
553 } else {
554 return 1;
555 }
556 }
557
558 int
559 utf8size(char *s) {
560 uchar c = *s;
561
562 if(~c&B7) {
563 return 1;
564 } else if((c&(B7|B6|B5)) == (B7|B6)) {
565 return 2;
566 } else if((c&(B7|B6|B5|B4)) == (B7|B6|B5)) {
567 return 3;
568 } else {
569 return 4;
570 }
571 }
572
573 void
574 selinit(void) {
575 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
576 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
577 sel.mode = 0;
578 sel.bx = -1;
579 sel.clip = NULL;
580 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
581 if(sel.xtarget == None)
582 sel.xtarget = XA_STRING;
583 }
584
585 static int
586 x2col(int x) {
587 x -= borderpx;
588 x /= xw.cw;
589
590 return LIMIT(x, 0, term.col-1);
591 }
592
593 static int
594 y2row(int y) {
595 y -= borderpx;
596 y /= xw.ch;
597
598 return LIMIT(y, 0, term.row-1);
599 }
600
601 static inline bool
602 selected(int x, int y) {
603 int bx, ex;
604
605 if(sel.ey == y && sel.by == y) {
606 bx = MIN(sel.bx, sel.ex);
607 ex = MAX(sel.bx, sel.ex);
608 return BETWEEN(x, bx, ex);
609 }
610
611 return ((sel.b.y < y && y < sel.e.y)
612 || (y == sel.e.y && x <= sel.e.x))
613 || (y == sel.b.y && x >= sel.b.x
614 && (x <= sel.e.x || sel.b.y != sel.e.y));
615 }
616
617 void
618 getbuttoninfo(XEvent *e, int *b, int *x, int *y) {
619 if(b)
620 *b = e->xbutton.button;
621
622 *x = x2col(e->xbutton.x);
623 *y = y2row(e->xbutton.y);
624
625 sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
626 sel.b.y = MIN(sel.by, sel.ey);
627 sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
628 sel.e.y = MAX(sel.by, sel.ey);
629 }
630
631 void
632 mousereport(XEvent *e) {
633 int x = x2col(e->xbutton.x);
634 int y = y2row(e->xbutton.y);
635 int button = e->xbutton.button;
636 int state = e->xbutton.state;
637 char buf[] = { '\033', '[', 'M', 0, 32+x+1, 32+y+1 };
638 static int ob, ox, oy;
639
640 /* from urxvt */
641 if(e->xbutton.type == MotionNotify) {
642 if(!IS_SET(MODE_MOUSEMOTION) || (x == ox && y == oy))
643 return;
644 button = ob + 32;
645 ox = x, oy = y;
646 } else if(e->xbutton.type == ButtonRelease || button == AnyButton) {
647 button = 3;
648 } else {
649 button -= Button1;
650 if(button >= 3)
651 button += 64 - 3;
652 if(e->xbutton.type == ButtonPress) {
653 ob = button;
654 ox = x, oy = y;
655 }
656 }
657
658 buf[3] = 32 + button + (state & ShiftMask ? 4 : 0)
659 + (state & Mod4Mask ? 8 : 0)
660 + (state & ControlMask ? 16 : 0);
661
662 ttywrite(buf, sizeof(buf));
663 }
664
665 void
666 bpress(XEvent *e) {
667 if(IS_SET(MODE_MOUSE)) {
668 mousereport(e);
669 } else if(e->xbutton.button == Button1) {
670 if(sel.bx != -1) {
671 sel.bx = -1;
672 tsetdirt(sel.b.y, sel.e.y);
673 draw();
674 }
675 sel.mode = 1;
676 sel.ex = sel.bx = x2col(e->xbutton.x);
677 sel.ey = sel.by = y2row(e->xbutton.y);
678 } else if(e->xbutton.button == Button4) {
679 ttywrite("\031", 1);
680 } else if(e->xbutton.button == Button5) {
681 ttywrite("\005", 1);
682 }
683 }
684
685 void
686 selcopy(void) {
687 char *str, *ptr, *p;
688 int x, y, bufsize, is_selected = 0, size;
689 Glyph *gp, *last;
690
691 if(sel.bx == -1) {
692 str = NULL;
693 } else {
694 bufsize = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
695 ptr = str = xmalloc(bufsize);
696
697 /* append every set & selected glyph to the selection */
698 for(y = 0; y < term.row; y++) {
699 gp = &term.line[y][0];
700 last = gp + term.col;
701
702 while(--last >= gp && !(last->state & GLYPH_SET))
703 /* nothing */;
704
705 for(x = 0; gp <= last; x++, ++gp) {
706 if(!(is_selected = selected(x, y)))
707 continue;
708
709 p = (gp->state & GLYPH_SET) ? gp->c : " ";
710 size = utf8size(p);
711 memcpy(ptr, p, size);
712 ptr += size;
713 }
714 /* \n at the end of every selected line except for the last one */
715 if(is_selected && y < sel.e.y)
716 *ptr++ = '\n';
717 }
718 *ptr = 0;
719 }
720 sel.alt = IS_SET(MODE_ALTSCREEN);
721 xsetsel(str);
722 }
723
724 void
725 selnotify(XEvent *e) {
726 ulong nitems, ofs, rem;
727 int format;
728 uchar *data;
729 Atom type;
730
731 ofs = 0;
732 do {
733 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
734 False, AnyPropertyType, &type, &format,
735 &nitems, &rem, &data)) {
736 fprintf(stderr, "Clipboard allocation failed\n");
737 return;
738 }
739 ttywrite((const char *) data, nitems * format / 8);
740 XFree(data);
741 /* number of 32-bit chunks returned */
742 ofs += nitems * format / 32;
743 } while(rem > 0);
744 }
745
746 void
747 selpaste(void) {
748 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
749 xw.win, CurrentTime);
750 }
751
752 void selclear(XEvent *e) {
753 if(sel.bx == -1)
754 return;
755 sel.bx = -1;
756 tsetdirt(sel.b.y, sel.e.y);
757 }
758
759 void
760 selrequest(XEvent *e) {
761 XSelectionRequestEvent *xsre;
762 XSelectionEvent xev;
763 Atom xa_targets, string;
764
765 xsre = (XSelectionRequestEvent *) e;
766 xev.type = SelectionNotify;
767 xev.requestor = xsre->requestor;
768 xev.selection = xsre->selection;
769 xev.target = xsre->target;
770 xev.time = xsre->time;
771 /* reject */
772 xev.property = None;
773
774 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
775 if(xsre->target == xa_targets) {
776 /* respond with the supported type */
777 string = sel.xtarget;
778 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
779 XA_ATOM, 32, PropModeReplace,
780 (uchar *) &string, 1);
781 xev.property = xsre->property;
782 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
783 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
784 xsre->target, 8, PropModeReplace,
785 (uchar *) sel.clip, strlen(sel.clip));
786 xev.property = xsre->property;
787 }
788
789 /* all done, send a notification to the listener */
790 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
791 fprintf(stderr, "Error sending SelectionNotify event\n");
792 }
793
794 void
795 xsetsel(char *str) {
796 /* register the selection for both the clipboard and the primary */
797 Atom clipboard;
798
799 free(sel.clip);
800 sel.clip = str;
801
802 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
803
804 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
805 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
806 }
807
808 void
809 brelease(XEvent *e) {
810 struct timeval now;
811
812 if(IS_SET(MODE_MOUSE)) {
813 mousereport(e);
814 return;
815 }
816
817 if(e->xbutton.button == Button2) {
818 selpaste();
819 } else if(e->xbutton.button == Button1) {
820 sel.mode = 0;
821 getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
822 term.dirty[sel.ey] = 1;
823 if(sel.bx == sel.ex && sel.by == sel.ey) {
824 sel.bx = -1;
825 gettimeofday(&now, NULL);
826
827 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
828 /* triple click on the line */
829 sel.b.x = sel.bx = 0;
830 sel.e.x = sel.ex = term.col;
831 sel.b.y = sel.e.y = sel.ey;
832 selcopy();
833 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
834 /* double click to select word */
835 sel.bx = sel.ex;
836 while(sel.bx > 0 && term.line[sel.ey][sel.bx-1].state & GLYPH_SET &&
837 term.line[sel.ey][sel.bx-1].c[0] != ' ') {
838 sel.bx--;
839 }
840 sel.b.x = sel.bx;
841 while(sel.ex < term.col-1 && term.line[sel.ey][sel.ex+1].state & GLYPH_SET &&
842 term.line[sel.ey][sel.ex+1].c[0] != ' ') {
843 sel.ex++;
844 }
845 sel.e.x = sel.ex;
846 sel.b.y = sel.e.y = sel.ey;
847 selcopy();
848 }
849 } else {
850 selcopy();
851 }
852 }
853
854 memcpy(&sel.tclick2, &sel.tclick1, sizeof(struct timeval));
855 gettimeofday(&sel.tclick1, NULL);
856 }
857
858 void
859 bmotion(XEvent *e) {
860 int starty, endy, oldey, oldex;
861
862 if(IS_SET(MODE_MOUSE)) {
863 mousereport(e);
864 return;
865 }
866
867 if(sel.mode) {
868 oldey = sel.ey;
869 oldex = sel.ex;
870 getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
871
872 if(oldey != sel.ey || oldex != sel.ex) {
873 starty = MIN(oldey, sel.ey);
874 endy = MAX(oldey, sel.ey);
875 tsetdirt(starty, endy);
876 }
877 }
878 }
879
880 void
881 die(const char *errstr, ...) {
882 va_list ap;
883
884 va_start(ap, errstr);
885 vfprintf(stderr, errstr, ap);
886 va_end(ap);
887 exit(EXIT_FAILURE);
888 }
889
890 void
891 execsh(void) {
892 char **args;
893 char *envshell = getenv("SHELL");
894 const struct passwd *pass = getpwuid(getuid());
895 char buf[sizeof(long) * 8 + 1];
896
897 unsetenv("COLUMNS");
898 unsetenv("LINES");
899 unsetenv("TERMCAP");
900
901 if(pass) {
902 setenv("LOGNAME", pass->pw_name, 1);
903 setenv("USER", pass->pw_name, 1);
904 setenv("SHELL", pass->pw_shell, 0);
905 setenv("HOME", pass->pw_dir, 0);
906 }
907
908 snprintf(buf, sizeof(buf), "%lu", xw.win);
909 setenv("WINDOWID", buf, 1);
910
911 signal(SIGCHLD, SIG_DFL);
912 signal(SIGHUP, SIG_DFL);
913 signal(SIGINT, SIG_DFL);
914 signal(SIGQUIT, SIG_DFL);
915 signal(SIGTERM, SIG_DFL);
916 signal(SIGALRM, SIG_DFL);
917
918 DEFAULT(envshell, shell);
919 setenv("TERM", termname, 1);
920 args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
921 execvp(args[0], args);
922 exit(EXIT_FAILURE);
923 }
924
925 void
926 sigchld(int a) {
927 int stat = 0;
928
929 if(waitpid(pid, &stat, 0) < 0)
930 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
931
932 if(WIFEXITED(stat)) {
933 exit(WEXITSTATUS(stat));
934 } else {
935 exit(EXIT_FAILURE);
936 }
937 }
938
939 void
940 ttynew(void) {
941 int m, s;
942 struct winsize w = {term.row, term.col, 0, 0};
943
944 /* seems to work fine on linux, openbsd and freebsd */
945 if(openpty(&m, &s, NULL, NULL, &w) < 0)
946 die("openpty failed: %s\n", SERRNO);
947
948 switch(pid = fork()) {
949 case -1:
950 die("fork failed\n");
951 break;
952 case 0:
953 setsid(); /* create a new process group */
954 dup2(s, STDIN_FILENO);
955 dup2(s, STDOUT_FILENO);
956 dup2(s, STDERR_FILENO);
957 if(ioctl(s, TIOCSCTTY, NULL) < 0)
958 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
959 close(s);
960 close(m);
961 execsh();
962 break;
963 default:
964 close(s);
965 cmdfd = m;
966 signal(SIGCHLD, sigchld);
967 if(opt_io) {
968 iofd = (!strcmp(opt_io, "-")) ?
969 STDOUT_FILENO :
970 open(opt_io, O_WRONLY | O_CREAT, 0666);
971 if(iofd < 0) {
972 fprintf(stderr, "Error opening %s:%s\n",
973 opt_io, strerror(errno));
974 }
975 }
976 }
977 }
978
979 void
980 dump(char c) {
981 static int col;
982
983 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
984 if(++col % 10 == 0)
985 fprintf(stderr, "\n");
986 }
987
988 void
989 ttyread(void) {
990 static char buf[BUFSIZ];
991 static int buflen = 0;
992 char *ptr;
993 char s[UTF_SIZ];
994 int charsize; /* size of utf8 char in bytes */
995 long utf8c;
996 int ret;
997
998 /* append read bytes to unprocessed bytes */
999 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1000 die("Couldn't read from shell: %s\n", SERRNO);
1001
1002 /* process every complete utf8 char */
1003 buflen += ret;
1004 ptr = buf;
1005 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
1006 charsize = utf8decode(ptr, &utf8c);
1007 utf8encode(&utf8c, s);
1008 tputc(s, charsize);
1009 ptr += charsize;
1010 buflen -= charsize;
1011 }
1012
1013 /* keep any uncomplete utf8 char for the next call */
1014 memmove(buf, ptr, buflen);
1015 }
1016
1017 void
1018 ttywrite(const char *s, size_t n) {
1019 if(write(cmdfd, s, n) == -1)
1020 die("write error on tty: %s\n", SERRNO);
1021 }
1022
1023 void
1024 ttyresize(void) {
1025 struct winsize w;
1026
1027 w.ws_row = term.row;
1028 w.ws_col = term.col;
1029 w.ws_xpixel = xw.tw;
1030 w.ws_ypixel = xw.th;
1031 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1032 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
1033 }
1034
1035 void
1036 tsetdirt(int top, int bot) {
1037 int i;
1038
1039 LIMIT(top, 0, term.row-1);
1040 LIMIT(bot, 0, term.row-1);
1041
1042 for(i = top; i <= bot; i++)
1043 term.dirty[i] = 1;
1044 }
1045
1046 void
1047 tfulldirt(void) {
1048 tsetdirt(0, term.row-1);
1049 }
1050
1051 void
1052 tcursor(int mode) {
1053 static TCursor c;
1054
1055 if(mode == CURSOR_SAVE) {
1056 c = term.c;
1057 } else if(mode == CURSOR_LOAD) {
1058 term.c = c;
1059 tmoveto(c.x, c.y);
1060 }
1061 }
1062
1063 void
1064 treset(void) {
1065 uint i;
1066
1067 term.c = (TCursor){{
1068 .mode = ATTR_NULL,
1069 .fg = defaultfg,
1070 .bg = defaultbg
1071 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1072
1073 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1074 for(i = tabspaces; i < term.col; i += tabspaces)
1075 term.tabs[i] = 1;
1076 term.top = 0;
1077 term.bot = term.row - 1;
1078 term.mode = MODE_WRAP;
1079
1080 tclearregion(0, 0, term.col-1, term.row-1);
1081 tmoveto(0, 0);
1082 tcursor(CURSOR_SAVE);
1083 }
1084
1085 void
1086 tnew(int col, int row) {
1087 /* set screen size */
1088 term.row = row;
1089 term.col = col;
1090 term.line = xmalloc(term.row * sizeof(Line));
1091 term.alt = xmalloc(term.row * sizeof(Line));
1092 term.dirty = xmalloc(term.row * sizeof(*term.dirty));
1093 term.tabs = xmalloc(term.col * sizeof(*term.tabs));
1094
1095 for(row = 0; row < term.row; row++) {
1096 term.line[row] = xmalloc(term.col * sizeof(Glyph));
1097 term.alt [row] = xmalloc(term.col * sizeof(Glyph));
1098 term.dirty[row] = 0;
1099 }
1100 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1101 /* setup screen */
1102 treset();
1103 }
1104
1105 void
1106 tswapscreen(void) {
1107 Line *tmp = term.line;
1108
1109 term.line = term.alt;
1110 term.alt = tmp;
1111 term.mode ^= MODE_ALTSCREEN;
1112 tfulldirt();
1113 }
1114
1115 void
1116 tscrolldown(int orig, int n) {
1117 int i;
1118 Line temp;
1119
1120 LIMIT(n, 0, term.bot-orig+1);
1121
1122 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1123
1124 for(i = term.bot; i >= orig+n; i--) {
1125 temp = term.line[i];
1126 term.line[i] = term.line[i-n];
1127 term.line[i-n] = temp;
1128
1129 term.dirty[i] = 1;
1130 term.dirty[i-n] = 1;
1131 }
1132
1133 selscroll(orig, n);
1134 }
1135
1136 void
1137 tscrollup(int orig, int n) {
1138 int i;
1139 Line temp;
1140 LIMIT(n, 0, term.bot-orig+1);
1141
1142 tclearregion(0, orig, term.col-1, orig+n-1);
1143
1144 for(i = orig; i <= term.bot-n; i++) {
1145 temp = term.line[i];
1146 term.line[i] = term.line[i+n];
1147 term.line[i+n] = temp;
1148
1149 term.dirty[i] = 1;
1150 term.dirty[i+n] = 1;
1151 }
1152
1153 selscroll(orig, -n);
1154 }
1155
1156 void
1157 selscroll(int orig, int n) {
1158 if(sel.bx == -1)
1159 return;
1160
1161 if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
1162 if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
1163 sel.bx = -1;
1164 return;
1165 }
1166 if(sel.by < term.top) {
1167 sel.by = term.top;
1168 sel.bx = 0;
1169 }
1170 if(sel.ey > term.bot) {
1171 sel.ey = term.bot;
1172 sel.ex = term.col;
1173 }
1174 sel.b.y = sel.by, sel.b.x = sel.bx;
1175 sel.e.y = sel.ey, sel.e.x = sel.ex;
1176 }
1177 }
1178
1179 void
1180 tnewline(int first_col) {
1181 int y = term.c.y;
1182
1183 if(y == term.bot) {
1184 tscrollup(term.top, 1);
1185 } else {
1186 y++;
1187 }
1188 tmoveto(first_col ? 0 : term.c.x, y);
1189 }
1190
1191 void
1192 csiparse(void) {
1193 /* int noarg = 1; */
1194 char *p = csiescseq.buf;
1195
1196 csiescseq.narg = 0;
1197 if(*p == '?')
1198 csiescseq.priv = 1, p++;
1199
1200 while(p < csiescseq.buf+csiescseq.len) {
1201 while(isdigit(*p)) {
1202 csiescseq.arg[csiescseq.narg] *= 10;
1203 csiescseq.arg[csiescseq.narg] += *p++ - '0'/*, noarg = 0 */;
1204 }
1205 if(*p == ';' && csiescseq.narg+1 < ESC_ARG_SIZ) {
1206 csiescseq.narg++, p++;
1207 } else {
1208 csiescseq.mode = *p;
1209 csiescseq.narg++;
1210
1211 return;
1212 }
1213 }
1214 }
1215
1216 /* for absolute user moves, when decom is set */
1217 void
1218 tmoveato(int x, int y) {
1219 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1220 }
1221
1222 void
1223 tmoveto(int x, int y) {
1224 int miny, maxy;
1225
1226 if(term.c.state & CURSOR_ORIGIN) {
1227 miny = term.top;
1228 maxy = term.bot;
1229 } else {
1230 miny = 0;
1231 maxy = term.row - 1;
1232 }
1233 LIMIT(x, 0, term.col-1);
1234 LIMIT(y, miny, maxy);
1235 term.c.state &= ~CURSOR_WRAPNEXT;
1236 term.c.x = x;
1237 term.c.y = y;
1238 }
1239
1240 void
1241 tsetchar(char *c, Glyph *attr, int x, int y) {
1242 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1243 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1244 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1245 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1246 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1247 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1248 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1249 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1250 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1251 };
1252
1253 /*
1254 * The table is proudly stolen from rxvt.
1255 */
1256 if(attr->mode & ATTR_GFX) {
1257 if(c[0] >= 0x41 && c[0] <= 0x7e
1258 && vt100_0[c[0] - 0x41]) {
1259 c = vt100_0[c[0] - 0x41];
1260 }
1261 }
1262
1263 term.dirty[y] = 1;
1264 term.line[y][x] = *attr;
1265 memcpy(term.line[y][x].c, c, UTF_SIZ);
1266 term.line[y][x].state |= GLYPH_SET;
1267 }
1268
1269 void
1270 tclearregion(int x1, int y1, int x2, int y2) {
1271 int x, y, temp;
1272
1273 if(x1 > x2)
1274 temp = x1, x1 = x2, x2 = temp;
1275 if(y1 > y2)
1276 temp = y1, y1 = y2, y2 = temp;
1277
1278 LIMIT(x1, 0, term.col-1);
1279 LIMIT(x2, 0, term.col-1);
1280 LIMIT(y1, 0, term.row-1);
1281 LIMIT(y2, 0, term.row-1);
1282
1283 for(y = y1; y <= y2; y++) {
1284 term.dirty[y] = 1;
1285 for(x = x1; x <= x2; x++)
1286 term.line[y][x].state = 0;
1287 }
1288 }
1289
1290 void
1291 tdeletechar(int n) {
1292 int src = term.c.x + n;
1293 int dst = term.c.x;
1294 int size = term.col - src;
1295
1296 term.dirty[term.c.y] = 1;
1297
1298 if(src >= term.col) {
1299 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1300 return;
1301 }
1302
1303 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1304 size * sizeof(Glyph));
1305 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1306 }
1307
1308 void
1309 tinsertblank(int n) {
1310 int src = term.c.x;
1311 int dst = src + n;
1312 int size = term.col - dst;
1313
1314 term.dirty[term.c.y] = 1;
1315
1316 if(dst >= term.col) {
1317 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1318 return;
1319 }
1320
1321 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1322 size * sizeof(Glyph));
1323 tclearregion(src, term.c.y, dst - 1, term.c.y);
1324 }
1325
1326 void
1327 tinsertblankline(int n) {
1328 if(term.c.y < term.top || term.c.y > term.bot)
1329 return;
1330
1331 tscrolldown(term.c.y, n);
1332 }
1333
1334 void
1335 tdeleteline(int n) {
1336 if(term.c.y < term.top || term.c.y > term.bot)
1337 return;
1338
1339 tscrollup(term.c.y, n);
1340 }
1341
1342 void
1343 tsetattr(int *attr, int l) {
1344 int i;
1345
1346 for(i = 0; i < l; i++) {
1347 switch(attr[i]) {
1348 case 0:
1349 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD \
1350 | ATTR_ITALIC | ATTR_BLINK);
1351 term.c.attr.fg = defaultfg;
1352 term.c.attr.bg = defaultbg;
1353 break;
1354 case 1:
1355 term.c.attr.mode |= ATTR_BOLD;
1356 break;
1357 case 3: /* enter standout (highlight) */
1358 term.c.attr.mode |= ATTR_ITALIC;
1359 break;
1360 case 4:
1361 term.c.attr.mode |= ATTR_UNDERLINE;
1362 break;
1363 case 5:
1364 term.c.attr.mode |= ATTR_BLINK;
1365 break;
1366 case 7:
1367 term.c.attr.mode |= ATTR_REVERSE;
1368 break;
1369 case 21:
1370 case 22:
1371 term.c.attr.mode &= ~ATTR_BOLD;
1372 break;
1373 case 23: /* leave standout (highlight) mode */
1374 term.c.attr.mode &= ~ATTR_ITALIC;
1375 break;
1376 case 24:
1377 term.c.attr.mode &= ~ATTR_UNDERLINE;
1378 break;
1379 case 25:
1380 term.c.attr.mode &= ~ATTR_BLINK;
1381 break;
1382 case 27:
1383 term.c.attr.mode &= ~ATTR_REVERSE;
1384 break;
1385 case 38:
1386 if(i + 2 < l && attr[i + 1] == 5) {
1387 i += 2;
1388 if(BETWEEN(attr[i], 0, 255)) {
1389 term.c.attr.fg = attr[i];
1390 } else {
1391 fprintf(stderr,
1392 "erresc: bad fgcolor %d\n",
1393 attr[i]);
1394 }
1395 } else {
1396 fprintf(stderr,
1397 "erresc(38): gfx attr %d unknown\n",
1398 attr[i]);
1399 }
1400 break;
1401 case 39:
1402 term.c.attr.fg = defaultfg;
1403 break;
1404 case 48:
1405 if(i + 2 < l && attr[i + 1] == 5) {
1406 i += 2;
1407 if(BETWEEN(attr[i], 0, 255)) {
1408 term.c.attr.bg = attr[i];
1409 } else {
1410 fprintf(stderr,
1411 "erresc: bad bgcolor %d\n",
1412 attr[i]);
1413 }
1414 } else {
1415 fprintf(stderr,
1416 "erresc(48): gfx attr %d unknown\n",
1417 attr[i]);
1418 }
1419 break;
1420 case 49:
1421 term.c.attr.bg = defaultbg;
1422 break;
1423 default:
1424 if(BETWEEN(attr[i], 30, 37)) {
1425 term.c.attr.fg = attr[i] - 30;
1426 } else if(BETWEEN(attr[i], 40, 47)) {
1427 term.c.attr.bg = attr[i] - 40;
1428 } else if(BETWEEN(attr[i], 90, 97)) {
1429 term.c.attr.fg = attr[i] - 90 + 8;
1430 } else if(BETWEEN(attr[i], 100, 107)) {
1431 term.c.attr.bg = attr[i] - 100 + 8;
1432 } else {
1433 fprintf(stderr,
1434 "erresc(default): gfx attr %d unknown\n",
1435 attr[i]), csidump();
1436 }
1437 break;
1438 }
1439 }
1440 }
1441
1442 void
1443 tsetscroll(int t, int b) {
1444 int temp;
1445
1446 LIMIT(t, 0, term.row-1);
1447 LIMIT(b, 0, term.row-1);
1448 if(t > b) {
1449 temp = t;
1450 t = b;
1451 b = temp;
1452 }
1453 term.top = t;
1454 term.bot = b;
1455 }
1456
1457 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1458
1459 void
1460 tsetmode(bool priv, bool set, int *args, int narg) {
1461 int *lim, mode;
1462
1463 for(lim = args + narg; args < lim; ++args) {
1464 if(priv) {
1465 switch(*args) {
1466 break;
1467 case 1: /* DECCKM -- Cursor key */
1468 MODBIT(term.mode, set, MODE_APPKEYPAD);
1469 break;
1470 case 5: /* DECSCNM -- Reverse video */
1471 mode = term.mode;
1472 MODBIT(term.mode, set, MODE_REVERSE);
1473 if(mode != term.mode)
1474 redraw();
1475 break;
1476 case 6: /* DECOM -- Origin */
1477 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1478 tmoveato(0, 0);
1479 break;
1480 case 7: /* DECAWM -- Auto wrap */
1481 MODBIT(term.mode, set, MODE_WRAP);
1482 break;
1483 case 0: /* Error (IGNORED) */
1484 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1485 case 3: /* DECCOLM -- Column (IGNORED) */
1486 case 4: /* DECSCLM -- Scroll (IGNORED) */
1487 case 8: /* DECARM -- Auto repeat (IGNORED) */
1488 case 18: /* DECPFF -- Printer feed (IGNORED) */
1489 case 19: /* DECPEX -- Printer extent (IGNORED) */
1490 case 42: /* DECNRCM -- National characters (IGNORED) */
1491 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1492 break;
1493 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1494 MODBIT(term.mode, !set, MODE_HIDE);
1495 break;
1496 case 1000: /* 1000,1002: enable xterm mouse report */
1497 MODBIT(term.mode, set, MODE_MOUSEBTN);
1498 break;
1499 case 1002:
1500 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1501 break;
1502 case 1049: /* = 1047 and 1048 */
1503 case 47:
1504 case 1047: {
1505 bool alt = IS_SET(MODE_ALTSCREEN) != 0;
1506 if(alt)
1507 tclearregion(0, 0, term.col-1, term.row-1);
1508 if(set ^ alt) /* set is always 1 or 0 */
1509 tswapscreen();
1510 if(*args != 1049)
1511 break;
1512 }
1513 /* pass through */
1514 case 1048:
1515 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1516 break;
1517 default:
1518 fprintf(stderr,
1519 "erresc: unknown private set/reset mode %d\n",
1520 *args);
1521 break;
1522 }
1523 } else {
1524 switch(*args) {
1525 case 0: /* Error (IGNORED) */
1526 break;
1527 case 2: /* KAM -- keyboard action */
1528 MODBIT(term.mode, set, MODE_KBDLOCK);
1529 break;
1530 case 4: /* IRM -- Insertion-replacement */
1531 MODBIT(term.mode, set, MODE_INSERT);
1532 break;
1533 case 12: /* XXX: SRM -- Send/Receive */
1534 break;
1535 case 20: /* LNM -- Linefeed/new line */
1536 MODBIT(term.mode, set, MODE_CRLF);
1537 break;
1538 default:
1539 fprintf(stderr,
1540 "erresc: unknown set/reset mode %d\n",
1541 *args);
1542 break;
1543 }
1544 }
1545 }
1546 }
1547 #undef MODBIT
1548
1549
1550 void
1551 csihandle(void) {
1552 switch(csiescseq.mode) {
1553 default:
1554 unknown:
1555 fprintf(stderr, "erresc: unknown csi ");
1556 csidump();
1557 /* die(""); */
1558 break;
1559 case '@': /* ICH -- Insert <n> blank char */
1560 DEFAULT(csiescseq.arg[0], 1);
1561 tinsertblank(csiescseq.arg[0]);
1562 break;
1563 case 'A': /* CUU -- Cursor <n> Up */
1564 DEFAULT(csiescseq.arg[0], 1);
1565 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1566 break;
1567 case 'B': /* CUD -- Cursor <n> Down */
1568 case 'e': /* VPR --Cursor <n> Down */
1569 DEFAULT(csiescseq.arg[0], 1);
1570 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1571 break;
1572 case 'c': /* DA -- Device Attributes */
1573 if(csiescseq.arg[0] == 0)
1574 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1575 break;
1576 case 'C': /* CUF -- Cursor <n> Forward */
1577 case 'a': /* HPR -- Cursor <n> Forward */
1578 DEFAULT(csiescseq.arg[0], 1);
1579 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1580 break;
1581 case 'D': /* CUB -- Cursor <n> Backward */
1582 DEFAULT(csiescseq.arg[0], 1);
1583 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1584 break;
1585 case 'E': /* CNL -- Cursor <n> Down and first col */
1586 DEFAULT(csiescseq.arg[0], 1);
1587 tmoveto(0, term.c.y+csiescseq.arg[0]);
1588 break;
1589 case 'F': /* CPL -- Cursor <n> Up and first col */
1590 DEFAULT(csiescseq.arg[0], 1);
1591 tmoveto(0, term.c.y-csiescseq.arg[0]);
1592 break;
1593 case 'g': /* TBC -- Tabulation clear */
1594 switch (csiescseq.arg[0]) {
1595 case 0: /* clear current tab stop */
1596 term.tabs[term.c.x] = 0;
1597 break;
1598 case 3: /* clear all the tabs */
1599 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1600 break;
1601 default:
1602 goto unknown;
1603 }
1604 break;
1605 case 'G': /* CHA -- Move to <col> */
1606 case '`': /* HPA */
1607 DEFAULT(csiescseq.arg[0], 1);
1608 tmoveto(csiescseq.arg[0]-1, term.c.y);
1609 break;
1610 case 'H': /* CUP -- Move to <row> <col> */
1611 case 'f': /* HVP */
1612 DEFAULT(csiescseq.arg[0], 1);
1613 DEFAULT(csiescseq.arg[1], 1);
1614 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1615 break;
1616 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1617 DEFAULT(csiescseq.arg[0], 1);
1618 while(csiescseq.arg[0]--)
1619 tputtab(1);
1620 break;
1621 case 'J': /* ED -- Clear screen */
1622 sel.bx = -1;
1623 switch(csiescseq.arg[0]) {
1624 case 0: /* below */
1625 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1626 if(term.c.y < term.row-1)
1627 tclearregion(0, term.c.y+1, term.col-1, term.row-1);
1628 break;
1629 case 1: /* above */
1630 if(term.c.y > 1)
1631 tclearregion(0, 0, term.col-1, term.c.y-1);
1632 tclearregion(0, term.c.y, term.c.x, term.c.y);
1633 break;
1634 case 2: /* all */
1635 tclearregion(0, 0, term.col-1, term.row-1);
1636 break;
1637 default:
1638 goto unknown;
1639 }
1640 break;
1641 case 'K': /* EL -- Clear line */
1642 switch(csiescseq.arg[0]) {
1643 case 0: /* right */
1644 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1645 break;
1646 case 1: /* left */
1647 tclearregion(0, term.c.y, term.c.x, term.c.y);
1648 break;
1649 case 2: /* all */
1650 tclearregion(0, term.c.y, term.col-1, term.c.y);
1651 break;
1652 }
1653 break;
1654 case 'S': /* SU -- Scroll <n> line up */
1655 DEFAULT(csiescseq.arg[0], 1);
1656 tscrollup(term.top, csiescseq.arg[0]);
1657 break;
1658 case 'T': /* SD -- Scroll <n> line down */
1659 DEFAULT(csiescseq.arg[0], 1);
1660 tscrolldown(term.top, csiescseq.arg[0]);
1661 break;
1662 case 'L': /* IL -- Insert <n> blank lines */
1663 DEFAULT(csiescseq.arg[0], 1);
1664 tinsertblankline(csiescseq.arg[0]);
1665 break;
1666 case 'l': /* RM -- Reset Mode */
1667 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
1668 break;
1669 case 'M': /* DL -- Delete <n> lines */
1670 DEFAULT(csiescseq.arg[0], 1);
1671 tdeleteline(csiescseq.arg[0]);
1672 break;
1673 case 'X': /* ECH -- Erase <n> char */
1674 DEFAULT(csiescseq.arg[0], 1);
1675 tclearregion(term.c.x, term.c.y, term.c.x + csiescseq.arg[0], term.c.y);
1676 break;
1677 case 'P': /* DCH -- Delete <n> char */
1678 DEFAULT(csiescseq.arg[0], 1);
1679 tdeletechar(csiescseq.arg[0]);
1680 break;
1681 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
1682 DEFAULT(csiescseq.arg[0], 1);
1683 while(csiescseq.arg[0]--)
1684 tputtab(0);
1685 break;
1686 case 'd': /* VPA -- Move to <row> */
1687 DEFAULT(csiescseq.arg[0], 1);
1688 tmoveato(term.c.x, csiescseq.arg[0]-1);
1689 break;
1690 case 'h': /* SM -- Set terminal mode */
1691 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
1692 break;
1693 case 'm': /* SGR -- Terminal attribute (color) */
1694 tsetattr(csiescseq.arg, csiescseq.narg);
1695 break;
1696 case 'r': /* DECSTBM -- Set Scrolling Region */
1697 if(csiescseq.priv) {
1698 goto unknown;
1699 } else {
1700 DEFAULT(csiescseq.arg[0], 1);
1701 DEFAULT(csiescseq.arg[1], term.row);
1702 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
1703 tmoveato(0, 0);
1704 }
1705 break;
1706 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1707 tcursor(CURSOR_SAVE);
1708 break;
1709 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1710 tcursor(CURSOR_LOAD);
1711 break;
1712 }
1713 }
1714
1715 void
1716 csidump(void) {
1717 int i;
1718 uint c;
1719
1720 printf("ESC[");
1721 for(i = 0; i < csiescseq.len; i++) {
1722 c = csiescseq.buf[i] & 0xff;
1723 if(isprint(c)) {
1724 putchar(c);
1725 } else if(c == '\n') {
1726 printf("(\\n)");
1727 } else if(c == '\r') {
1728 printf("(\\r)");
1729 } else if(c == 0x1b) {
1730 printf("(\\e)");
1731 } else {
1732 printf("(%02x)", c);
1733 }
1734 }
1735 putchar('\n');
1736 }
1737
1738 void
1739 csireset(void) {
1740 memset(&csiescseq, 0, sizeof(csiescseq));
1741 }
1742
1743 void
1744 strhandle(void) {
1745 char *p;
1746
1747 /*
1748 * TODO: make this being useful in case of color palette change.
1749 */
1750 strparse();
1751
1752 p = strescseq.buf;
1753
1754 switch(strescseq.type) {
1755 case ']': /* OSC -- Operating System Command */
1756 switch(p[0]) {
1757 case '0':
1758 case '1':
1759 case '2':
1760 /*
1761 * TODO: Handle special chars in string, like umlauts.
1762 */
1763 if(p[1] == ';') {
1764 XStoreName(xw.dpy, xw.win, strescseq.buf+2);
1765 }
1766 break;
1767 case ';':
1768 XStoreName(xw.dpy, xw.win, strescseq.buf+1);
1769 break;
1770 case '4': /* TODO: Set color (arg0) to "rgb:%hexr/$hexg/$hexb" (arg1) */
1771 break;
1772 default:
1773 fprintf(stderr, "erresc: unknown str ");
1774 strdump();
1775 break;
1776 }
1777 break;
1778 case 'k': /* old title set compatibility */
1779 XStoreName(xw.dpy, xw.win, strescseq.buf);
1780 break;
1781 case 'P': /* DSC -- Device Control String */
1782 case '_': /* APC -- Application Program Command */
1783 case '^': /* PM -- Privacy Message */
1784 default:
1785 fprintf(stderr, "erresc: unknown str ");
1786 strdump();
1787 /* die(""); */
1788 break;
1789 }
1790 }
1791
1792 void
1793 strparse(void) {
1794 /*
1795 * TODO: Implement parsing like for CSI when required.
1796 * Format: ESC type cmd ';' arg0 [';' argn] ESC \
1797 */
1798 return;
1799 }
1800
1801 void
1802 strdump(void) {
1803 int i;
1804 uint c;
1805
1806 printf("ESC%c", strescseq.type);
1807 for(i = 0; i < strescseq.len; i++) {
1808 c = strescseq.buf[i] & 0xff;
1809 if(isprint(c)) {
1810 putchar(c);
1811 } else if(c == '\n') {
1812 printf("(\\n)");
1813 } else if(c == '\r') {
1814 printf("(\\r)");
1815 } else if(c == 0x1b) {
1816 printf("(\\e)");
1817 } else {
1818 printf("(%02x)", c);
1819 }
1820 }
1821 printf("ESC\\\n");
1822 }
1823
1824 void
1825 strreset(void) {
1826 memset(&strescseq, 0, sizeof(strescseq));
1827 }
1828
1829 void
1830 tputtab(bool forward) {
1831 uint x = term.c.x;
1832
1833 if(forward) {
1834 if(x == term.col)
1835 return;
1836 for(++x; x < term.col && !term.tabs[x]; ++x)
1837 /* nothing */ ;
1838 } else {
1839 if(x == 0)
1840 return;
1841 for(--x; x > 0 && !term.tabs[x]; --x)
1842 /* nothing */ ;
1843 }
1844 tmoveto(x, term.c.y);
1845 }
1846
1847 void
1848 tputc(char *c, int len) {
1849 uchar ascii = *c;
1850 bool control = ascii < '\x20' || ascii == 0177;
1851
1852 if(iofd != -1) {
1853 if (xwrite(iofd, c, len) < 0) {
1854 fprintf(stderr, "Error writting in %s:%s\n",
1855 opt_io, strerror(errno));
1856 close(iofd);
1857 iofd = -1;
1858 }
1859 }
1860 /*
1861 * STR sequences must be checked before anything else
1862 * because it can use some control codes as part of the sequence.
1863 */
1864 if(term.esc & ESC_STR) {
1865 switch(ascii) {
1866 case '\033':
1867 term.esc = ESC_START | ESC_STR_END;
1868 break;
1869 case '\a': /* backwards compatibility to xterm */
1870 term.esc = 0;
1871 strhandle();
1872 break;
1873 default:
1874 strescseq.buf[strescseq.len++] = ascii;
1875 if(strescseq.len+1 >= STR_BUF_SIZ) {
1876 term.esc = 0;
1877 strhandle();
1878 }
1879 }
1880 return;
1881 }
1882
1883 /*
1884 * Actions of control codes must be performed as soon they arrive
1885 * because they can be embedded inside a control sequence, and
1886 * they must not cause conflicts with sequences.
1887 */
1888 if(control) {
1889 switch(ascii) {
1890 case '\t': /* HT */
1891 tputtab(1);
1892 return;
1893 case '\b': /* BS */
1894 tmoveto(term.c.x-1, term.c.y);
1895 return;
1896 case '\r': /* CR */
1897 tmoveto(0, term.c.y);
1898 return;
1899 case '\f': /* LF */
1900 case '\v': /* VT */
1901 case '\n': /* LF */
1902 /* go to first col if the mode is set */
1903 tnewline(IS_SET(MODE_CRLF));
1904 return;
1905 case '\a': /* BEL */
1906 if(!(xw.state & WIN_FOCUSED))
1907 xseturgency(1);
1908 return;
1909 case '\033': /* ESC */
1910 csireset();
1911 term.esc = ESC_START;
1912 return;
1913 case '\016': /* SO */
1914 term.c.attr.mode |= ATTR_GFX;
1915 return;
1916 case '\017': /* SI */
1917 term.c.attr.mode &= ~ATTR_GFX;
1918 return;
1919 case '\032': /* SUB */
1920 case '\030': /* CAN */
1921 csireset();
1922 return;
1923 case '\005': /* ENQ (IGNORED) */
1924 case '\000': /* NUL (IGNORED) */
1925 case '\021': /* XON (IGNORED) */
1926 case '\023': /* XOFF (IGNORED) */
1927 case 0177: /* DEL (IGNORED) */
1928 return;
1929 }
1930 } else if(term.esc & ESC_START) {
1931 if(term.esc & ESC_CSI) {
1932 csiescseq.buf[csiescseq.len++] = ascii;
1933 if(BETWEEN(ascii, 0x40, 0x7E)
1934 || csiescseq.len >= ESC_BUF_SIZ) {
1935 term.esc = 0;
1936 csiparse(), csihandle();
1937 }
1938 } else if(term.esc & ESC_STR_END) {
1939 term.esc = 0;
1940 if(ascii == '\\')
1941 strhandle();
1942 } else if(term.esc & ESC_ALTCHARSET) {
1943 switch(ascii) {
1944 case '0': /* Line drawing set */
1945 term.c.attr.mode |= ATTR_GFX;
1946 break;
1947 case 'B': /* USASCII */
1948 term.c.attr.mode &= ~ATTR_GFX;
1949 break;
1950 case 'A': /* UK (IGNORED) */
1951 case '<': /* multinational charset (IGNORED) */
1952 case '5': /* Finnish (IGNORED) */
1953 case 'C': /* Finnish (IGNORED) */
1954 case 'K': /* German (IGNORED) */
1955 break;
1956 default:
1957 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
1958 }
1959 term.esc = 0;
1960 } else if(term.esc & ESC_TEST) {
1961 if(ascii == '8') { /* DEC screen alignment test. */
1962 char E[UTF_SIZ] = "E";
1963 int x, y;
1964
1965 for(x = 0; x < term.col; ++x) {
1966 for(y = 0; y < term.row; ++y)
1967 tsetchar(E, &term.c.attr, x, y);
1968 }
1969 }
1970 term.esc = 0;
1971 } else {
1972 switch(ascii) {
1973 case '[':
1974 term.esc |= ESC_CSI;
1975 break;
1976 case '#':
1977 term.esc |= ESC_TEST;
1978 break;
1979 case 'P': /* DCS -- Device Control String */
1980 case '_': /* APC -- Application Program Command */
1981 case '^': /* PM -- Privacy Message */
1982 case ']': /* OSC -- Operating System Command */
1983 case 'k': /* old title set compatibility */
1984 strreset();
1985 strescseq.type = ascii;
1986 term.esc |= ESC_STR;
1987 break;
1988 case '(': /* set primary charset G0 */
1989 term.esc |= ESC_ALTCHARSET;
1990 break;
1991 case ')': /* set secondary charset G1 (IGNORED) */
1992 case '*': /* set tertiary charset G2 (IGNORED) */
1993 case '+': /* set quaternary charset G3 (IGNORED) */
1994 term.esc = 0;
1995 break;
1996 case 'D': /* IND -- Linefeed */
1997 if(term.c.y == term.bot) {
1998 tscrollup(term.top, 1);
1999 } else {
2000 tmoveto(term.c.x, term.c.y+1);
2001 }
2002 term.esc = 0;
2003 break;
2004 case 'E': /* NEL -- Next line */
2005 tnewline(1); /* always go to first col */
2006 term.esc = 0;
2007 break;
2008 case 'H': /* HTS -- Horizontal tab stop */
2009 term.tabs[term.c.x] = 1;
2010 term.esc = 0;
2011 break;
2012 case 'M': /* RI -- Reverse index */
2013 if(term.c.y == term.top) {
2014 tscrolldown(term.top, 1);
2015 } else {
2016 tmoveto(term.c.x, term.c.y-1);
2017 }
2018 term.esc = 0;
2019 break;
2020 case 'Z': /* DECID -- Identify Terminal */
2021 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2022 term.esc = 0;
2023 break;
2024 case 'c': /* RIS -- Reset to inital state */
2025 treset();
2026 term.esc = 0;
2027 xresettitle();
2028 break;
2029 case '=': /* DECPAM -- Application keypad */
2030 term.mode |= MODE_APPKEYPAD;
2031 term.esc = 0;
2032 break;
2033 case '>': /* DECPNM -- Normal keypad */
2034 term.mode &= ~MODE_APPKEYPAD;
2035 term.esc = 0;
2036 break;
2037 case '7': /* DECSC -- Save Cursor */
2038 tcursor(CURSOR_SAVE);
2039 term.esc = 0;
2040 break;
2041 case '8': /* DECRC -- Restore Cursor */
2042 tcursor(CURSOR_LOAD);
2043 term.esc = 0;
2044 break;
2045 case '\\': /* ST -- Stop */
2046 term.esc = 0;
2047 break;
2048 default:
2049 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2050 (uchar) ascii, isprint(ascii)? ascii:'.');
2051 term.esc = 0;
2052 }
2053 }
2054 /*
2055 * All characters which forms part of a sequence are not
2056 * printed
2057 */
2058 return;
2059 }
2060 /*
2061 * Display control codes only if we are in graphic mode
2062 */
2063 if(control && !(term.c.attr.mode & ATTR_GFX))
2064 return;
2065 if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
2066 sel.bx = -1;
2067 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
2068 tnewline(1); /* always go to first col */
2069 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2070 if(term.c.x+1 < term.col)
2071 tmoveto(term.c.x+1, term.c.y);
2072 else
2073 term.c.state |= CURSOR_WRAPNEXT;
2074 }
2075
2076 int
2077 tresize(int col, int row) {
2078 int i, x;
2079 int minrow = MIN(row, term.row);
2080 int mincol = MIN(col, term.col);
2081 int slide = term.c.y - row + 1;
2082 bool *bp;
2083
2084 if(col < 1 || row < 1)
2085 return 0;
2086
2087 /* free unneeded rows */
2088 i = 0;
2089 if(slide > 0) {
2090 /* slide screen to keep cursor where we expect it -
2091 * tscrollup would work here, but we can optimize to
2092 * memmove because we're freeing the earlier lines */
2093 for(/* i = 0 */; i < slide; i++) {
2094 free(term.line[i]);
2095 free(term.alt[i]);
2096 }
2097 memmove(term.line, term.line + slide, row * sizeof(Line));
2098 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2099 }
2100 for(i += row; i < term.row; i++) {
2101 free(term.line[i]);
2102 free(term.alt[i]);
2103 }
2104
2105 /* resize to new height */
2106 term.line = xrealloc(term.line, row * sizeof(Line));
2107 term.alt = xrealloc(term.alt, row * sizeof(Line));
2108 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2109 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2110
2111 /* resize each row to new width, zero-pad if needed */
2112 for(i = 0; i < minrow; i++) {
2113 term.dirty[i] = 1;
2114 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2115 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2116 for(x = mincol; x < col; x++) {
2117 term.line[i][x].state = 0;
2118 term.alt[i][x].state = 0;
2119 }
2120 }
2121
2122 /* allocate any new rows */
2123 for(/* i == minrow */; i < row; i++) {
2124 term.dirty[i] = 1;
2125 term.line[i] = xcalloc(col, sizeof(Glyph));
2126 term.alt [i] = xcalloc(col, sizeof(Glyph));
2127 }
2128 if(col > term.col) {
2129 bp = term.tabs + term.col;
2130
2131 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2132 while(--bp > term.tabs && !*bp)
2133 /* nothing */ ;
2134 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2135 *bp = 1;
2136 }
2137 /* update terminal size */
2138 term.col = col;
2139 term.row = row;
2140 /* reset scrolling region */
2141 tsetscroll(0, row-1);
2142 /* make use of the LIMIT in tmoveto */
2143 tmoveto(term.c.x, term.c.y);
2144
2145 return (slide > 0);
2146 }
2147
2148 void
2149 xresize(int col, int row) {
2150 xw.tw = MAX(1, 2*borderpx + col * xw.cw);
2151 xw.th = MAX(1, 2*borderpx + row * xw.ch);
2152
2153 XftDrawChange(xw.xft_draw, xw.buf);
2154 }
2155
2156 void
2157 xloadcols(void) {
2158 int i, r, g, b;
2159 XRenderColor xft_color = { .alpha = 0 };
2160
2161 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
2162 for(i = 0; i < LEN(colorname); i++) {
2163 if(!colorname[i])
2164 continue;
2165 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.xft_col[i])) {
2166 die("Could not allocate color '%s'\n", colorname[i]);
2167 }
2168 }
2169
2170 /* load colors [16-255] ; same colors as xterm */
2171 for(i = 16, r = 0; r < 6; r++) {
2172 for(g = 0; g < 6; g++) {
2173 for(b = 0; b < 6; b++) {
2174 xft_color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
2175 xft_color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
2176 xft_color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
2177 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &xft_color, &dc.xft_col[i])) {
2178 die("Could not allocate color %d\n", i);
2179 }
2180 i++;
2181 }
2182 }
2183 }
2184
2185 for(r = 0; r < 24; r++, i++) {
2186 xft_color.red = xft_color.green = xft_color.blue = 0x0808 + 0x0a0a * r;
2187 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &xft_color,
2188 &dc.xft_col[i])) {
2189 die("Could not allocate color %d\n", i);
2190 }
2191 }
2192 }
2193
2194 void
2195 xtermclear(int col1, int row1, int col2, int row2) {
2196 XftDrawRect(xw.xft_draw,
2197 &dc.xft_col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2198 borderpx + col1 * xw.cw,
2199 borderpx + row1 * xw.ch,
2200 (col2-col1+1) * xw.cw,
2201 (row2-row1+1) * xw.ch);
2202 }
2203
2204 /*
2205 * Absolute coordinates.
2206 */
2207 void
2208 xclear(int x1, int y1, int x2, int y2) {
2209 XftDrawRect(xw.xft_draw,
2210 &dc.xft_col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2211 x1, y1, x2-x1, y2-y1);
2212 }
2213
2214 void
2215 xhints(void) {
2216 XClassHint class = {opt_class ? opt_class : termname, termname};
2217 XWMHints wm = {.flags = InputHint, .input = 1};
2218 XSizeHints *sizeh = NULL;
2219
2220 sizeh = XAllocSizeHints();
2221 if(xw.isfixed == False) {
2222 sizeh->flags = PSize | PResizeInc | PBaseSize;
2223 sizeh->height = xw.h;
2224 sizeh->width = xw.w;
2225 sizeh->height_inc = xw.ch;
2226 sizeh->width_inc = xw.cw;
2227 sizeh->base_height = 2*borderpx;
2228 sizeh->base_width = 2*borderpx;
2229 } else {
2230 sizeh->flags = PMaxSize | PMinSize;
2231 sizeh->min_width = sizeh->max_width = xw.fw;
2232 sizeh->min_height = sizeh->max_height = xw.fh;
2233 }
2234
2235 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
2236 XFree(sizeh);
2237 }
2238
2239 int
2240 xloadfont(Font *f, FcPattern *pattern) {
2241 FcPattern *match;
2242 FcResult result;
2243
2244 match = XftFontMatch(xw.dpy, xw.scr, pattern, &result);
2245 if(!match)
2246 return 1;
2247 if(!(f->xft_set = XftFontOpenPattern(xw.dpy, match))) {
2248 FcPatternDestroy(match);
2249 return 1;
2250 }
2251
2252 f->ascent = f->xft_set->ascent;
2253 f->descent = f->xft_set->descent;
2254 f->lbearing = 0;
2255 f->rbearing = f->xft_set->max_advance_width;
2256
2257 f->height = f->xft_set->height;
2258 f->width = f->lbearing + f->rbearing;
2259
2260 return 0;
2261 }
2262
2263 void
2264 xloadfonts(char *fontstr, int fontsize) {
2265 FcPattern *pattern;
2266 FcResult result;
2267 double fontval;
2268
2269 if(fontstr[0] == '-') {
2270 pattern = XftXlfdParse(fontstr, False, False);
2271 } else {
2272 pattern = FcNameParse((FcChar8 *)fontstr);
2273 }
2274
2275 if(!pattern)
2276 die("st: can't open font %s\n", fontstr);
2277
2278 if(fontsize > 0) {
2279 FcPatternDel(pattern, FC_PIXEL_SIZE);
2280 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2281 usedfontsize = fontsize;
2282 } else {
2283 result = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2284 if(result == FcResultMatch) {
2285 usedfontsize = (int)fontval;
2286 } else {
2287 /*
2288 * Default font size is 12, if none given. This is to
2289 * have a known usedfontsize value.
2290 */
2291 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
2292 usedfontsize = 12;
2293 }
2294 }
2295
2296 if(xloadfont(&dc.font, pattern))
2297 die("st: can't open font %s\n", fontstr);
2298
2299 /* Setting character width and height. */
2300 xw.cw = dc.font.width;
2301 xw.ch = dc.font.height;
2302
2303 FcPatternDel(pattern, FC_WEIGHT);
2304 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
2305 if(xloadfont(&dc.bfont, pattern))
2306 die("st: can't open font %s\n", fontstr);
2307
2308 FcPatternDel(pattern, FC_SLANT);
2309 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
2310 if(xloadfont(&dc.ibfont, pattern))
2311 die("st: can't open font %s\n", fontstr);
2312
2313 FcPatternDel(pattern, FC_WEIGHT);
2314 if(xloadfont(&dc.ifont, pattern))
2315 die("st: can't open font %s\n", fontstr);
2316
2317 FcPatternDestroy(pattern);
2318 }
2319
2320 void
2321 xzoom(const Arg *arg)
2322 {
2323 xloadfonts(usedfont, usedfontsize + arg->i);
2324 cresize(0, 0);
2325 draw();
2326 }
2327
2328 void
2329 xinit(void) {
2330 XSetWindowAttributes attrs;
2331 Cursor cursor;
2332 Window parent;
2333 int sw, sh, major, minor;
2334
2335 if(!(xw.dpy = XOpenDisplay(NULL)))
2336 die("Can't open display\n");
2337 xw.scr = XDefaultScreen(xw.dpy);
2338 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
2339
2340 /* font */
2341 usedfont = (opt_font == NULL)? font : opt_font;
2342 xloadfonts(usedfont, 0);
2343
2344 /* colors */
2345 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
2346 xloadcols();
2347
2348 /* adjust fixed window geometry */
2349 if(xw.isfixed) {
2350 sw = DisplayWidth(xw.dpy, xw.scr);
2351 sh = DisplayHeight(xw.dpy, xw.scr);
2352 if(xw.fx < 0)
2353 xw.fx = sw + xw.fx - xw.fw - 1;
2354 if(xw.fy < 0)
2355 xw.fy = sh + xw.fy - xw.fh - 1;
2356
2357 xw.h = xw.fh;
2358 xw.w = xw.fw;
2359 } else {
2360 /* window - default size */
2361 xw.h = 2*borderpx + term.row * xw.ch;
2362 xw.w = 2*borderpx + term.col * xw.cw;
2363 xw.fx = 0;
2364 xw.fy = 0;
2365 }
2366
2367 attrs.background_pixel = dc.xft_col[defaultbg].pixel;
2368 attrs.border_pixel = dc.xft_col[defaultbg].pixel;
2369 attrs.bit_gravity = NorthWestGravity;
2370 attrs.event_mask = FocusChangeMask | KeyPressMask
2371 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
2372 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
2373 attrs.colormap = xw.cmap;
2374
2375 parent = opt_embed ? strtol(opt_embed, NULL, 0) : XRootWindow(xw.dpy, xw.scr);
2376 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
2377 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
2378 xw.vis,
2379 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
2380 | CWColormap,
2381 &attrs);
2382
2383 /* double buffering */
2384 if(!XdbeQueryExtension(xw.dpy, &major, &minor))
2385 die("Xdbe extension is not present\n");
2386 xw.buf = XdbeAllocateBackBufferName(xw.dpy, xw.win, XdbeCopied);
2387
2388 /* Xft rendering context */
2389 xw.xft_draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
2390
2391 /* input methods */
2392 xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL);
2393 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
2394 | XIMStatusNothing, XNClientWindow, xw.win,
2395 XNFocusWindow, xw.win, NULL);
2396 /* gc */
2397 dc.gc = XCreateGC(xw.dpy, xw.win, 0, NULL);
2398
2399 /* white cursor, black outline */
2400 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
2401 XDefineCursor(xw.dpy, xw.win, cursor);
2402 XRecolorCursor(xw.dpy, cursor,
2403 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
2404 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
2405
2406 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
2407 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
2408 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
2409
2410 xresettitle();
2411 XMapWindow(xw.dpy, xw.win);
2412 xhints();
2413 XSync(xw.dpy, 0);
2414 }
2415
2416 void
2417 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
2418 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
2419 width = charlen * xw.cw;
2420 Font *font = &dc.font;
2421 XGlyphInfo extents;
2422 XftColor *fg = &dc.xft_col[base.fg], *bg = &dc.xft_col[base.bg],
2423 *temp, revfg, revbg;
2424 XRenderColor colfg, colbg;
2425
2426 if(base.mode & ATTR_BOLD) {
2427 if(BETWEEN(base.fg, 0, 7)) {
2428 /* basic system colors */
2429 fg = &dc.xft_col[base.fg + 8];
2430 } else if(BETWEEN(base.fg, 16, 195)) {
2431 /* 256 colors */
2432 fg = &dc.xft_col[base.fg + 36];
2433 } else if(BETWEEN(base.fg, 232, 251)) {
2434 /* greyscale */
2435 fg = &dc.xft_col[base.fg + 4];
2436 }
2437 /*
2438 * Those ranges will not be brightened:
2439 * 8 - 15 – bright system colors
2440 * 196 - 231 – highest 256 color cube
2441 * 252 - 255 – brightest colors in greyscale
2442 */
2443 font = &dc.bfont;
2444 }
2445
2446 if(base.mode & ATTR_ITALIC)
2447 font = &dc.ifont;
2448 if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD))
2449 font = &dc.ibfont;
2450
2451 if(IS_SET(MODE_REVERSE)) {
2452 if(fg == &dc.xft_col[defaultfg]) {
2453 fg = &dc.xft_col[defaultbg];
2454 } else {
2455 colfg.red = ~fg->color.red;
2456 colfg.green = ~fg->color.green;
2457 colfg.blue = ~fg->color.blue;
2458 colfg.alpha = fg->color.alpha;
2459 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
2460 fg = &revfg;
2461 }
2462
2463 if(bg == &dc.xft_col[defaultbg]) {
2464 bg = &dc.xft_col[defaultfg];
2465 } else {
2466 colbg.red = ~bg->color.red;
2467 colbg.green = ~bg->color.green;
2468 colbg.blue = ~bg->color.blue;
2469 colbg.alpha = bg->color.alpha;
2470 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &revbg);
2471 bg = &revbg;
2472 }
2473 }
2474
2475 if(base.mode & ATTR_REVERSE)
2476 temp = fg, fg = bg, bg = temp;
2477
2478 XftTextExtentsUtf8(xw.dpy, font->xft_set, (FcChar8 *)s, bytelen,
2479 &extents);
2480 width = extents.xOff;
2481
2482 /* Intelligent cleaning up of the borders. */
2483 if(x == 0) {
2484 xclear(0, (y == 0)? 0 : winy, borderpx,
2485 winy + xw.ch + (y == term.row-1)? xw.h : 0);
2486 }
2487 if(x + charlen >= term.col-1) {
2488 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
2489 (y == term.row-1)? xw.h : (winy + xw.ch));
2490 }
2491 if(y == 0)
2492 xclear(winx, 0, winx + width, borderpx);
2493 if(y == term.row-1)
2494 xclear(winx, winy + xw.ch, winx + width, xw.h);
2495
2496 XftDrawRect(xw.xft_draw, bg, winx, winy, width, xw.ch);
2497 XftDrawStringUtf8(xw.xft_draw, fg, font->xft_set, winx,
2498 winy + font->ascent, (FcChar8 *)s, bytelen);
2499
2500 if(base.mode & ATTR_UNDERLINE) {
2501 XftDrawRect(xw.xft_draw, fg, winx, winy + font->ascent + 1,
2502 width, 1);
2503 }
2504 }
2505
2506 void
2507 xdrawcursor(void) {
2508 static int oldx = 0, oldy = 0;
2509 int sl;
2510 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs, 0};
2511
2512 LIMIT(oldx, 0, term.col-1);
2513 LIMIT(oldy, 0, term.row-1);
2514
2515 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
2516 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
2517
2518 /* remove the old cursor */
2519 if(term.line[oldy][oldx].state & GLYPH_SET) {
2520 sl = utf8size(term.line[oldy][oldx].c);
2521 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
2522 oldy, 1, sl);
2523 } else {
2524 xtermclear(oldx, oldy, oldx, oldy);
2525 }
2526
2527 /* draw the new one */
2528 if(!(IS_SET(MODE_HIDE))) {
2529 if(!(xw.state & WIN_FOCUSED))
2530 g.bg = defaultucs;
2531
2532 if(IS_SET(MODE_REVERSE))
2533 g.mode |= ATTR_REVERSE, g.fg = defaultcs, g.bg = defaultfg;
2534
2535 sl = utf8size(g.c);
2536 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
2537 oldx = term.c.x, oldy = term.c.y;
2538 }
2539 }
2540
2541 void
2542 xresettitle(void) {
2543 XStoreName(xw.dpy, xw.win, opt_title ? opt_title : "st");
2544 }
2545
2546 void
2547 redraw(void) {
2548 struct timespec tv = {0, REDRAW_TIMEOUT * 1000};
2549
2550 tfulldirt();
2551 draw();
2552 XSync(xw.dpy, False); /* necessary for a good tput flash */
2553 nanosleep(&tv, NULL);
2554 }
2555
2556 void
2557 draw(void) {
2558 XdbeSwapInfo swpinfo[1] = {{xw.win, XdbeCopied}};
2559
2560 drawregion(0, 0, term.col, term.row);
2561 XdbeSwapBuffers(xw.dpy, swpinfo, 1);
2562 }
2563
2564 void
2565 drawregion(int x1, int y1, int x2, int y2) {
2566 int ic, ib, x, y, ox, sl;
2567 Glyph base, new;
2568 char buf[DRAW_BUF_SIZ];
2569 bool ena_sel = sel.bx != -1, alt = IS_SET(MODE_ALTSCREEN) != 0;
2570
2571 if((sel.alt != 0) ^ alt)
2572 ena_sel = 0;
2573 if(!(xw.state & WIN_VISIBLE))
2574 return;
2575
2576 for(y = y1; y < y2; y++) {
2577 if(!term.dirty[y])
2578 continue;
2579
2580 xtermclear(0, y, term.col, y);
2581 term.dirty[y] = 0;
2582 base = term.line[y][0];
2583 ic = ib = ox = 0;
2584 for(x = x1; x < x2; x++) {
2585 new = term.line[y][x];
2586 if(ena_sel && *(new.c) && selected(x, y))
2587 new.mode ^= ATTR_REVERSE;
2588 if(ib > 0 && (!(new.state & GLYPH_SET)
2589 || ATTRCMP(base, new)
2590 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
2591 xdraws(buf, base, ox, y, ic, ib);
2592 ic = ib = 0;
2593 }
2594 if(new.state & GLYPH_SET) {
2595 if(ib == 0) {
2596 ox = x;
2597 base = new;
2598 }
2599 sl = utf8size(new.c);
2600 memcpy(buf+ib, new.c, sl);
2601 ib += sl;
2602 ++ic;
2603 }
2604 }
2605 if(ib > 0)
2606 xdraws(buf, base, ox, y, ic, ib);
2607 }
2608 xdrawcursor();
2609 }
2610
2611 void
2612 expose(XEvent *ev) {
2613 XExposeEvent *e = &ev->xexpose;
2614
2615 if(xw.state & WIN_REDRAW) {
2616 if(!e->count)
2617 xw.state &= ~WIN_REDRAW;
2618 }
2619 }
2620
2621 void
2622 visibility(XEvent *ev) {
2623 XVisibilityEvent *e = &ev->xvisibility;
2624
2625 if(e->state == VisibilityFullyObscured) {
2626 xw.state &= ~WIN_VISIBLE;
2627 } else if(!(xw.state & WIN_VISIBLE)) {
2628 /* need a full redraw for next Expose, not just a buf copy */
2629 xw.state |= WIN_VISIBLE | WIN_REDRAW;
2630 }
2631 }
2632
2633 void
2634 unmap(XEvent *ev) {
2635 xw.state &= ~WIN_VISIBLE;
2636 }
2637
2638 void
2639 xseturgency(int add) {
2640 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
2641
2642 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
2643 XSetWMHints(xw.dpy, xw.win, h);
2644 XFree(h);
2645 }
2646
2647 void
2648 focus(XEvent *ev) {
2649 if(ev->type == FocusIn) {
2650 XSetICFocus(xw.xic);
2651 xw.state |= WIN_FOCUSED;
2652 xseturgency(0);
2653 } else {
2654 XUnsetICFocus(xw.xic);
2655 xw.state &= ~WIN_FOCUSED;
2656 }
2657 }
2658
2659 char*
2660 kmap(KeySym k, uint state) {
2661 int i;
2662 uint mask;
2663
2664 state &= ~Mod2Mask;
2665 for(i = 0; i < LEN(key); i++) {
2666 mask = key[i].mask;
2667
2668 if(key[i].k == k && ((state & mask) == mask
2669 || (mask == XK_NO_MOD && !state))) {
2670 return (char*)key[i].s;
2671 }
2672 }
2673 return NULL;
2674 }
2675
2676 void
2677 kpress(XEvent *ev) {
2678 XKeyEvent *e = &ev->xkey;
2679 KeySym ksym;
2680 char buf[32], *customkey;
2681 int len, meta, shift, i;
2682 Status status;
2683
2684 if (IS_SET(MODE_KBDLOCK))
2685 return;
2686
2687 meta = e->state & Mod1Mask;
2688 shift = e->state & ShiftMask;
2689 len = XmbLookupString(xw.xic, e, buf, sizeof(buf), &ksym, &status);
2690
2691 /* 1. shortcuts */
2692 for(i = 0; i < LEN(shortcuts); i++) {
2693 if((ksym == shortcuts[i].keysym)
2694 && (CLEANMASK(shortcuts[i].mod) == \
2695 CLEANMASK(e->state))
2696 && shortcuts[i].func) {
2697 shortcuts[i].func(&(shortcuts[i].arg));
2698 }
2699 }
2700
2701 /* 2. custom keys from config.h */
2702 if((customkey = kmap(ksym, e->state))) {
2703 ttywrite(customkey, strlen(customkey));
2704 /* 2. hardcoded (overrides X lookup) */
2705 } else {
2706 switch(ksym) {
2707 case XK_Up:
2708 case XK_Down:
2709 case XK_Left:
2710 case XK_Right:
2711 /* XXX: shift up/down doesn't work */
2712 sprintf(buf, "\033%c%c",
2713 IS_SET(MODE_APPKEYPAD) ? 'O' : '[',
2714 (shift ? "dacb":"DACB")[ksym - XK_Left]);
2715 ttywrite(buf, 3);
2716 break;
2717 case XK_Insert:
2718 if(shift)
2719 selpaste();
2720 break;
2721 case XK_Return:
2722 if(meta)
2723 ttywrite("\033", 1);
2724
2725 if(IS_SET(MODE_CRLF)) {
2726 ttywrite("\r\n", 2);
2727 } else {
2728 ttywrite("\r", 1);
2729 }
2730 break;
2731 /* 3. X lookup */
2732 default:
2733 if(len > 0) {
2734 if(meta && len == 1)
2735 ttywrite("\033", 1);
2736 ttywrite(buf, len);
2737 }
2738 break;
2739 }
2740 }
2741 }
2742
2743 void
2744 cmessage(XEvent *e) {
2745 /* See xembed specs
2746 http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html */
2747 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
2748 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
2749 xw.state |= WIN_FOCUSED;
2750 xseturgency(0);
2751 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
2752 xw.state &= ~WIN_FOCUSED;
2753 }
2754 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
2755 /* Send SIGHUP to shell */
2756 kill(pid, SIGHUP);
2757 exit(EXIT_SUCCESS);
2758 }
2759 }
2760
2761 void
2762 cresize(int width, int height)
2763 {
2764 int col, row;
2765
2766 if(width != 0)
2767 xw.w = width;
2768 if(height != 0)
2769 xw.h = height;
2770
2771 col = (xw.w - 2*borderpx) / xw.cw;
2772 row = (xw.h - 2*borderpx) / xw.ch;
2773
2774 tresize(col, row);
2775 xresize(col, row);
2776 ttyresize();
2777 }
2778
2779 void
2780 resize(XEvent *e) {
2781 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
2782 return;
2783
2784 cresize(e->xconfigure.width, e->xconfigure.height);
2785 }
2786
2787 void
2788 run(void) {
2789 XEvent ev;
2790 fd_set rfd;
2791 int xfd = XConnectionNumber(xw.dpy), i;
2792 struct timeval drawtimeout, *tv = NULL;
2793
2794 for(i = 0;; i++) {
2795 FD_ZERO(&rfd);
2796 FD_SET(cmdfd, &rfd);
2797 FD_SET(xfd, &rfd);
2798 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
2799 if(errno == EINTR)
2800 continue;
2801 die("select failed: %s\n", SERRNO);
2802 }
2803
2804 /*
2805 * Stop after a certain number of reads so the user does not
2806 * feel like the system is stuttering.
2807 */
2808 if(i < 1000 && FD_ISSET(cmdfd, &rfd)) {
2809 ttyread();
2810
2811 /*
2812 * Just wait a bit so it isn't disturbing the
2813 * user and the system is able to write something.
2814 */
2815 drawtimeout.tv_sec = 0;
2816 drawtimeout.tv_usec = 5;
2817 tv = &drawtimeout;
2818 continue;
2819 }
2820 i = 0;
2821 tv = NULL;
2822
2823 while(XPending(xw.dpy)) {
2824 XNextEvent(xw.dpy, &ev);
2825 if(XFilterEvent(&ev, None))
2826 continue;
2827 if(handler[ev.type])
2828 (handler[ev.type])(&ev);
2829 }
2830
2831 draw();
2832 XFlush(xw.dpy);
2833 }
2834 }
2835
2836 int
2837 main(int argc, char *argv[]) {
2838 int i, bitm, xr, yr;
2839 uint wr, hr;
2840
2841 xw.fw = xw.fh = xw.fx = xw.fy = 0;
2842 xw.isfixed = False;
2843
2844 for(i = 1; i < argc; i++) {
2845 switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
2846 case 'c':
2847 if(++i < argc)
2848 opt_class = argv[i];
2849 break;
2850 case 'e':
2851 /* eat every remaining arguments */
2852 if(++i < argc)
2853 opt_cmd = &argv[i];
2854 goto run;
2855 case 'f':
2856 if(++i < argc)
2857 opt_font = argv[i];
2858 break;
2859 case 'g':
2860 if(++i >= argc)
2861 break;
2862
2863 bitm = XParseGeometry(argv[i], &xr, &yr, &wr, &hr);
2864 if(bitm & XValue)
2865 xw.fx = xr;
2866 if(bitm & YValue)
2867 xw.fy = yr;
2868 if(bitm & WidthValue)
2869 xw.fw = (int)wr;
2870 if(bitm & HeightValue)
2871 xw.fh = (int)hr;
2872 if(bitm & XNegative && xw.fx == 0)
2873 xw.fx = -1;
2874 if(bitm & XNegative && xw.fy == 0)
2875 xw.fy = -1;
2876
2877 if(xw.fh != 0 && xw.fw != 0)
2878 xw.isfixed = True;
2879 break;
2880 case 'o':
2881 if(++i < argc)
2882 opt_io = argv[i];
2883 break;
2884 case 't':
2885 if(++i < argc)
2886 opt_title = argv[i];
2887 break;
2888 case 'v':
2889 default:
2890 die(USAGE);
2891 case 'w':
2892 if(++i < argc)
2893 opt_embed = argv[i];
2894 break;
2895 }
2896 }
2897
2898 run:
2899 setlocale(LC_CTYPE, "");
2900 XSetLocaleModifiers("");
2901 tnew(80, 24);
2902 xinit();
2903 ttynew();
2904 selinit();
2905 run();
2906 return 0;
2907 }
2908