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Restoring the Alt + Backspace functionality. Thanks Brandon Invergo!
[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
32 #define Glyph Glyph_
33 #define Font Font_
34 #define Draw XftDraw *
35 #define Colour XftColor
36 #define Colourmap Colormap
37
38 #if defined(__linux)
39 #include <pty.h>
40 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
41 #include <util.h>
42 #elif defined(__FreeBSD__) || defined(__DragonFly__)
43 #include <libutil.h>
44 #endif
45
46 #define USAGE \
47 "st " VERSION " (c) 2010-2012 st engineers\n" \
48 "usage: st [-v] [-c class] [-f font] [-g geometry] [-o file]" \
49 " [-t title] [-w windowid] [-e command ...]\n"
50
51 /* XEMBED messages */
52 #define XEMBED_FOCUS_IN 4
53 #define XEMBED_FOCUS_OUT 5
54
55 /* Arbitrary sizes */
56 #define ESC_BUF_SIZ 256
57 #define ESC_ARG_SIZ 16
58 #define STR_BUF_SIZ 256
59 #define STR_ARG_SIZ 16
60 #define DRAW_BUF_SIZ 20*1024
61 #define UTF_SIZ 4
62 #define XK_ANY_MOD UINT_MAX
63 #define XK_NO_MOD 0
64
65 #define REDRAW_TIMEOUT (80*1000) /* 80 ms */
66
67 /* macros */
68 #define SERRNO strerror(errno)
69 #define MIN(a, b) ((a) < (b) ? (a) : (b))
70 #define MAX(a, b) ((a) < (b) ? (b) : (a))
71 #define LEN(a) (sizeof(a) / sizeof(a[0]))
72 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
73 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
74 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
75 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
76 #define IS_SET(flag) (term.mode & (flag))
77 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_usec-t2.tv_usec)/1000)
78
79 #define VT102ID "\033[?6c"
80
81 enum glyph_attribute {
82 ATTR_NULL = 0,
83 ATTR_REVERSE = 1,
84 ATTR_UNDERLINE = 2,
85 ATTR_BOLD = 4,
86 ATTR_GFX = 8,
87 ATTR_ITALIC = 16,
88 ATTR_BLINK = 32,
89 };
90
91 enum cursor_movement {
92 CURSOR_SAVE,
93 CURSOR_LOAD
94 };
95
96 enum cursor_state {
97 CURSOR_DEFAULT = 0,
98 CURSOR_WRAPNEXT = 1,
99 CURSOR_ORIGIN = 2
100 };
101
102 enum glyph_state {
103 GLYPH_SET = 1,
104 GLYPH_DIRTY = 2
105 };
106
107 enum term_mode {
108 MODE_WRAP = 1,
109 MODE_INSERT = 2,
110 MODE_APPKEYPAD = 4,
111 MODE_ALTSCREEN = 8,
112 MODE_CRLF = 16,
113 MODE_MOUSEBTN = 32,
114 MODE_MOUSEMOTION = 64,
115 MODE_MOUSE = 32|64,
116 MODE_REVERSE = 128,
117 MODE_KBDLOCK = 256,
118 MODE_HIDE = 512,
119 MODE_ECHO = 1024,
120 MODE_APPCURSOR = 2048
121 };
122
123 enum escape_state {
124 ESC_START = 1,
125 ESC_CSI = 2,
126 ESC_STR = 4, /* DSC, OSC, PM, APC */
127 ESC_ALTCHARSET = 8,
128 ESC_STR_END = 16, /* a final string was encountered */
129 ESC_TEST = 32, /* Enter in test mode */
130 };
131
132 enum window_state {
133 WIN_VISIBLE = 1,
134 WIN_REDRAW = 2,
135 WIN_FOCUSED = 4
136 };
137
138 /* bit macro */
139 #undef B0
140 enum { B0=1, B1=2, B2=4, B3=8, B4=16, B5=32, B6=64, B7=128 };
141
142 typedef unsigned char uchar;
143 typedef unsigned int uint;
144 typedef unsigned long ulong;
145 typedef unsigned short ushort;
146
147 typedef struct {
148 char c[UTF_SIZ]; /* character code */
149 uchar mode; /* attribute flags */
150 ushort fg; /* foreground */
151 ushort bg; /* background */
152 uchar state; /* state flags */
153 } Glyph;
154
155 typedef Glyph* Line;
156
157 typedef struct {
158 Glyph attr; /* current char attributes */
159 int x;
160 int y;
161 char state;
162 } TCursor;
163
164 /* CSI Escape sequence structs */
165 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
166 typedef struct {
167 char buf[ESC_BUF_SIZ]; /* raw string */
168 int len; /* raw string length */
169 char priv;
170 int arg[ESC_ARG_SIZ];
171 int narg; /* nb of args */
172 char mode;
173 } CSIEscape;
174
175 /* STR Escape sequence structs */
176 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
177 typedef struct {
178 char type; /* ESC type ... */
179 char buf[STR_BUF_SIZ]; /* raw string */
180 int len; /* raw string length */
181 char *args[STR_ARG_SIZ];
182 int narg; /* nb of args */
183 } STREscape;
184
185 /* Internal representation of the screen */
186 typedef struct {
187 int row; /* nb row */
188 int col; /* nb col */
189 Line *line; /* screen */
190 Line *alt; /* alternate screen */
191 bool *dirty; /* dirtyness of lines */
192 TCursor c; /* cursor */
193 int top; /* top scroll limit */
194 int bot; /* bottom scroll limit */
195 int mode; /* terminal mode flags */
196 int esc; /* escape state flags */
197 bool *tabs;
198 } Term;
199
200 /* Purely graphic info */
201 typedef struct {
202 Display *dpy;
203 Colourmap cmap;
204 Window win;
205 XdbeBackBuffer buf;
206 Atom xembed, wmdeletewin;
207 XIM xim;
208 XIC xic;
209 Draw draw;
210 Visual *vis;
211 int scr;
212 bool isfixed; /* is fixed geometry? */
213 int fx, fy, fw, fh; /* fixed geometry */
214 int tw, th; /* tty width and height */
215 int w; /* window width */
216 int h; /* window height */
217 int ch; /* char height */
218 int cw; /* char width */
219 char state; /* focus, redraw, visible */
220 } XWindow;
221
222 typedef struct {
223 KeySym k;
224 uint mask;
225 char s[ESC_BUF_SIZ];
226 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
227 signed char appkey; /* application keypad */
228 signed char appcursor; /* application cursor */
229 signed char crlf; /* crlf mode */
230 } Key;
231
232 /* TODO: use better name for vars... */
233 typedef struct {
234 int mode;
235 int bx, by;
236 int ex, ey;
237 struct {
238 int x, y;
239 } b, e;
240 char *clip;
241 Atom xtarget;
242 bool alt;
243 struct timeval tclick1;
244 struct timeval tclick2;
245 } Selection;
246
247 typedef union {
248 int i;
249 unsigned int ui;
250 float f;
251 const void *v;
252 } Arg;
253
254 typedef struct {
255 unsigned int mod;
256 KeySym keysym;
257 void (*func)(const Arg *);
258 const Arg arg;
259 } Shortcut;
260
261 /* function definitions used in config.h */
262 static void xzoom(const Arg *);
263 static void selpaste(const Arg *);
264
265 /* Config.h for applying patches and the configuration. */
266 #include "config.h"
267
268 /* Font structure */
269 typedef struct {
270 int height;
271 int width;
272 int ascent;
273 int descent;
274 short lbearing;
275 short rbearing;
276 XftFont *set;
277 } Font;
278
279 /* Drawing Context */
280 typedef struct {
281 Colour col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
282 Font font, bfont, ifont, ibfont;
283 } DC;
284
285 static void die(const char *, ...);
286 static void draw(void);
287 static void redraw(void);
288 static void drawregion(int, int, int, int);
289 static void execsh(void);
290 static void sigchld(int);
291 static void run(void);
292
293 static void csidump(void);
294 static void csihandle(void);
295 static void csiparse(void);
296 static void csireset(void);
297 static void strdump(void);
298 static void strhandle(void);
299 static void strparse(void);
300 static void strreset(void);
301
302 static void tclearregion(int, int, int, int);
303 static void tcursor(int);
304 static void tdeletechar(int);
305 static void tdeleteline(int);
306 static void tinsertblank(int);
307 static void tinsertblankline(int);
308 static void tmoveto(int, int);
309 static void tmoveato(int x, int y);
310 static void tnew(int, int);
311 static void tnewline(int);
312 static void tputtab(bool);
313 static void tputc(char *, int);
314 static void treset(void);
315 static int tresize(int, int);
316 static void tscrollup(int, int);
317 static void tscrolldown(int, int);
318 static void tsetattr(int*, int);
319 static void tsetchar(char *, Glyph *, int, int);
320 static void tsetscroll(int, int);
321 static void tswapscreen(void);
322 static void tsetdirt(int, int);
323 static void tsetmode(bool, bool, int *, int);
324 static void tfulldirt(void);
325 static void techo(char *, int);
326
327 static inline bool match(uint, uint);
328 static void ttynew(void);
329 static void ttyread(void);
330 static void ttyresize(void);
331 static void ttywrite(const char *, size_t);
332
333 static void xdraws(char *, Glyph, int, int, int, int);
334 static void xhints(void);
335 static void xclear(int, int, int, int);
336 static void xdrawcursor(void);
337 static void xinit(void);
338 static void xloadcols(void);
339 static void xresettitle(void);
340 static void xseturgency(int);
341 static void xsetsel(char*);
342 static void xtermclear(int, int, int, int);
343 static void xresize(int, int);
344
345 static void expose(XEvent *);
346 static void visibility(XEvent *);
347 static void unmap(XEvent *);
348 static char *kmap(KeySym, uint);
349 static void kpress(XEvent *);
350 static void cmessage(XEvent *);
351 static void cresize(int width, int height);
352 static void resize(XEvent *);
353 static void focus(XEvent *);
354 static void brelease(XEvent *);
355 static void bpress(XEvent *);
356 static void bmotion(XEvent *);
357 static void selnotify(XEvent *);
358 static void selclear(XEvent *);
359 static void selrequest(XEvent *);
360
361 static void selinit(void);
362 static inline bool selected(int, int);
363 static void selcopy(void);
364 static void selscroll(int, int);
365
366 static int utf8decode(char *, long *);
367 static int utf8encode(long *, char *);
368 static int utf8size(char *);
369 static int isfullutf8(char *, int);
370
371 static ssize_t xwrite(int, char *, size_t);
372 static void *xmalloc(size_t);
373 static void *xrealloc(void *, size_t);
374 static void *xcalloc(size_t nmemb, size_t size);
375
376 static void (*handler[LASTEvent])(XEvent *) = {
377 [KeyPress] = kpress,
378 [ClientMessage] = cmessage,
379 [ConfigureNotify] = resize,
380 [VisibilityNotify] = visibility,
381 [UnmapNotify] = unmap,
382 [Expose] = expose,
383 [FocusIn] = focus,
384 [FocusOut] = focus,
385 [MotionNotify] = bmotion,
386 [ButtonPress] = bpress,
387 [ButtonRelease] = brelease,
388 [SelectionClear] = selclear,
389 [SelectionNotify] = selnotify,
390 [SelectionRequest] = selrequest,
391 };
392
393 /* Globals */
394 static DC dc;
395 static XWindow xw;
396 static Term term;
397 static CSIEscape csiescseq;
398 static STREscape strescseq;
399 static int cmdfd;
400 static pid_t pid;
401 static Selection sel;
402 static int iofd = -1;
403 static char **opt_cmd = NULL;
404 static char *opt_io = NULL;
405 static char *opt_title = NULL;
406 static char *opt_embed = NULL;
407 static char *opt_class = NULL;
408 static char *opt_font = NULL;
409
410 static char *usedfont = NULL;
411 static int usedfontsize = 0;
412
413 ssize_t
414 xwrite(int fd, char *s, size_t len) {
415 size_t aux = len;
416
417 while(len > 0) {
418 ssize_t r = write(fd, s, len);
419 if(r < 0)
420 return r;
421 len -= r;
422 s += r;
423 }
424 return aux;
425 }
426
427 void *
428 xmalloc(size_t len) {
429 void *p = malloc(len);
430
431 if(!p)
432 die("Out of memory\n");
433
434 return p;
435 }
436
437 void *
438 xrealloc(void *p, size_t len) {
439 if((p = realloc(p, len)) == NULL)
440 die("Out of memory\n");
441
442 return p;
443 }
444
445 void *
446 xcalloc(size_t nmemb, size_t size) {
447 void *p = calloc(nmemb, size);
448
449 if(!p)
450 die("Out of memory\n");
451
452 return p;
453 }
454
455 int
456 utf8decode(char *s, long *u) {
457 uchar c;
458 int i, n, rtn;
459
460 rtn = 1;
461 c = *s;
462 if(~c & B7) { /* 0xxxxxxx */
463 *u = c;
464 return rtn;
465 } else if((c & (B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */
466 *u = c&(B4|B3|B2|B1|B0);
467 n = 1;
468 } else if((c & (B7|B6|B5|B4)) == (B7|B6|B5)) { /* 1110xxxx */
469 *u = c&(B3|B2|B1|B0);
470 n = 2;
471 } else if((c & (B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) { /* 11110xxx */
472 *u = c & (B2|B1|B0);
473 n = 3;
474 } else {
475 goto invalid;
476 }
477
478 for(i = n, ++s; i > 0; --i, ++rtn, ++s) {
479 c = *s;
480 if((c & (B7|B6)) != B7) /* 10xxxxxx */
481 goto invalid;
482 *u <<= 6;
483 *u |= c & (B5|B4|B3|B2|B1|B0);
484 }
485
486 if((n == 1 && *u < 0x80) ||
487 (n == 2 && *u < 0x800) ||
488 (n == 3 && *u < 0x10000) ||
489 (*u >= 0xD800 && *u <= 0xDFFF)) {
490 goto invalid;
491 }
492
493 return rtn;
494 invalid:
495 *u = 0xFFFD;
496
497 return rtn;
498 }
499
500 int
501 utf8encode(long *u, char *s) {
502 uchar *sp;
503 ulong uc;
504 int i, n;
505
506 sp = (uchar *)s;
507 uc = *u;
508 if(uc < 0x80) {
509 *sp = uc; /* 0xxxxxxx */
510 return 1;
511 } else if(*u < 0x800) {
512 *sp = (uc >> 6) | (B7|B6); /* 110xxxxx */
513 n = 1;
514 } else if(uc < 0x10000) {
515 *sp = (uc >> 12) | (B7|B6|B5); /* 1110xxxx */
516 n = 2;
517 } else if(uc <= 0x10FFFF) {
518 *sp = (uc >> 18) | (B7|B6|B5|B4); /* 11110xxx */
519 n = 3;
520 } else {
521 goto invalid;
522 }
523
524 for(i=n,++sp; i>0; --i,++sp)
525 *sp = ((uc >> 6*(i-1)) & (B5|B4|B3|B2|B1|B0)) | B7; /* 10xxxxxx */
526
527 return n+1;
528 invalid:
529 /* U+FFFD */
530 *s++ = '\xEF';
531 *s++ = '\xBF';
532 *s = '\xBD';
533
534 return 3;
535 }
536
537 /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
538 UTF-8 otherwise return 0 */
539 int
540 isfullutf8(char *s, int b) {
541 uchar *c1, *c2, *c3;
542
543 c1 = (uchar *)s;
544 c2 = (uchar *)++s;
545 c3 = (uchar *)++s;
546 if(b < 1) {
547 return 0;
548 } else if((*c1&(B7|B6|B5)) == (B7|B6) && b == 1) {
549 return 0;
550 } else if((*c1&(B7|B6|B5|B4)) == (B7|B6|B5) &&
551 ((b == 1) ||
552 ((b == 2) && (*c2&(B7|B6)) == B7))) {
553 return 0;
554 } else if((*c1&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4) &&
555 ((b == 1) ||
556 ((b == 2) && (*c2&(B7|B6)) == B7) ||
557 ((b == 3) && (*c2&(B7|B6)) == B7 && (*c3&(B7|B6)) == B7))) {
558 return 0;
559 } else {
560 return 1;
561 }
562 }
563
564 int
565 utf8size(char *s) {
566 uchar c = *s;
567
568 if(~c&B7) {
569 return 1;
570 } else if((c&(B7|B6|B5)) == (B7|B6)) {
571 return 2;
572 } else if((c&(B7|B6|B5|B4)) == (B7|B6|B5)) {
573 return 3;
574 } else {
575 return 4;
576 }
577 }
578
579 void
580 selinit(void) {
581 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
582 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
583 sel.mode = 0;
584 sel.bx = -1;
585 sel.clip = NULL;
586 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
587 if(sel.xtarget == None)
588 sel.xtarget = XA_STRING;
589 }
590
591 static int
592 x2col(int x) {
593 x -= borderpx;
594 x /= xw.cw;
595
596 return LIMIT(x, 0, term.col-1);
597 }
598
599 static int
600 y2row(int y) {
601 y -= borderpx;
602 y /= xw.ch;
603
604 return LIMIT(y, 0, term.row-1);
605 }
606
607 static inline bool
608 selected(int x, int y) {
609 int bx, ex;
610
611 if(sel.ey == y && sel.by == y) {
612 bx = MIN(sel.bx, sel.ex);
613 ex = MAX(sel.bx, sel.ex);
614 return BETWEEN(x, bx, ex);
615 }
616
617 return ((sel.b.y < y && y < sel.e.y)
618 || (y == sel.e.y && x <= sel.e.x))
619 || (y == sel.b.y && x >= sel.b.x
620 && (x <= sel.e.x || sel.b.y != sel.e.y));
621 }
622
623 void
624 getbuttoninfo(XEvent *e) {
625 sel.ex = x2col(e->xbutton.x);
626 sel.ey = y2row(e->xbutton.y);
627
628 sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
629 sel.b.y = MIN(sel.by, sel.ey);
630 sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
631 sel.e.y = MAX(sel.by, sel.ey);
632 }
633
634 void
635 mousereport(XEvent *e) {
636 int x = x2col(e->xbutton.x);
637 int y = y2row(e->xbutton.y);
638 int button = e->xbutton.button;
639 int state = e->xbutton.state;
640 char buf[] = { '\033', '[', 'M', 0, 32+x+1, 32+y+1 };
641 static int ob, ox, oy;
642
643 /* from urxvt */
644 if(e->xbutton.type == MotionNotify) {
645 if(!IS_SET(MODE_MOUSEMOTION) || (x == ox && y == oy))
646 return;
647 button = ob + 32;
648 ox = x, oy = y;
649 } else if(e->xbutton.type == ButtonRelease || button == AnyButton) {
650 button = 3;
651 } else {
652 button -= Button1;
653 if(button >= 3)
654 button += 64 - 3;
655 if(e->xbutton.type == ButtonPress) {
656 ob = button;
657 ox = x, oy = y;
658 }
659 }
660
661 buf[3] = 32 + button + (state & ShiftMask ? 4 : 0)
662 + (state & Mod4Mask ? 8 : 0)
663 + (state & ControlMask ? 16 : 0);
664
665 ttywrite(buf, sizeof(buf));
666 }
667
668 void
669 bpress(XEvent *e) {
670 if(IS_SET(MODE_MOUSE)) {
671 mousereport(e);
672 } else if(e->xbutton.button == Button1) {
673 if(sel.bx != -1) {
674 sel.bx = -1;
675 tsetdirt(sel.b.y, sel.e.y);
676 draw();
677 }
678 sel.mode = 1;
679 sel.ex = sel.bx = x2col(e->xbutton.x);
680 sel.ey = sel.by = y2row(e->xbutton.y);
681 } else if(e->xbutton.button == Button4) {
682 ttywrite("\031", 1);
683 } else if(e->xbutton.button == Button5) {
684 ttywrite("\005", 1);
685 }
686 }
687
688 void
689 selcopy(void) {
690 char *str, *ptr, *p;
691 int x, y, bufsize, is_selected = 0, size;
692 Glyph *gp, *last;
693
694 if(sel.bx == -1) {
695 str = NULL;
696 } else {
697 bufsize = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
698 ptr = str = xmalloc(bufsize);
699
700 /* append every set & selected glyph to the selection */
701 for(y = 0; y < term.row; y++) {
702 gp = &term.line[y][0];
703 last = gp + term.col;
704
705 while(--last >= gp && !(last->state & GLYPH_SET))
706 /* nothing */;
707
708 for(x = 0; gp <= last; x++, ++gp) {
709 if(!(is_selected = selected(x, y)))
710 continue;
711
712 p = (gp->state & GLYPH_SET) ? gp->c : " ";
713 size = utf8size(p);
714 memcpy(ptr, p, size);
715 ptr += size;
716 }
717 /* \n at the end of every selected line except for the last one */
718 if(is_selected && y < sel.e.y)
719 *ptr++ = '\n';
720 }
721 *ptr = 0;
722 }
723 sel.alt = IS_SET(MODE_ALTSCREEN);
724 xsetsel(str);
725 }
726
727 void
728 selnotify(XEvent *e) {
729 ulong nitems, ofs, rem;
730 int format;
731 uchar *data;
732 Atom type;
733
734 ofs = 0;
735 do {
736 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
737 False, AnyPropertyType, &type, &format,
738 &nitems, &rem, &data)) {
739 fprintf(stderr, "Clipboard allocation failed\n");
740 return;
741 }
742 ttywrite((const char *) data, nitems * format / 8);
743 XFree(data);
744 /* number of 32-bit chunks returned */
745 ofs += nitems * format / 32;
746 } while(rem > 0);
747 }
748
749 void
750 selpaste(const Arg *dummy) {
751 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
752 xw.win, CurrentTime);
753 }
754
755 void selclear(XEvent *e) {
756 if(sel.bx == -1)
757 return;
758 sel.bx = -1;
759 tsetdirt(sel.b.y, sel.e.y);
760 }
761
762 void
763 selrequest(XEvent *e) {
764 XSelectionRequestEvent *xsre;
765 XSelectionEvent xev;
766 Atom xa_targets, string;
767
768 xsre = (XSelectionRequestEvent *) e;
769 xev.type = SelectionNotify;
770 xev.requestor = xsre->requestor;
771 xev.selection = xsre->selection;
772 xev.target = xsre->target;
773 xev.time = xsre->time;
774 /* reject */
775 xev.property = None;
776
777 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
778 if(xsre->target == xa_targets) {
779 /* respond with the supported type */
780 string = sel.xtarget;
781 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
782 XA_ATOM, 32, PropModeReplace,
783 (uchar *) &string, 1);
784 xev.property = xsre->property;
785 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
786 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
787 xsre->target, 8, PropModeReplace,
788 (uchar *) sel.clip, strlen(sel.clip));
789 xev.property = xsre->property;
790 }
791
792 /* all done, send a notification to the listener */
793 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
794 fprintf(stderr, "Error sending SelectionNotify event\n");
795 }
796
797 void
798 xsetsel(char *str) {
799 /* register the selection for both the clipboard and the primary */
800 Atom clipboard;
801
802 free(sel.clip);
803 sel.clip = str;
804
805 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
806
807 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
808 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
809 }
810
811 void
812 brelease(XEvent *e) {
813 struct timeval now;
814
815 if(IS_SET(MODE_MOUSE)) {
816 mousereport(e);
817 return;
818 }
819
820 if(e->xbutton.button == Button2) {
821 selpaste(NULL);
822 } else if(e->xbutton.button == Button1) {
823 sel.mode = 0;
824 getbuttoninfo(e);
825 term.dirty[sel.ey] = 1;
826 if(sel.bx == sel.ex && sel.by == sel.ey) {
827 sel.bx = -1;
828 gettimeofday(&now, NULL);
829
830 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
831 /* triple click on the line */
832 sel.b.x = sel.bx = 0;
833 sel.e.x = sel.ex = term.col;
834 sel.b.y = sel.e.y = sel.ey;
835 selcopy();
836 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
837 /* double click to select word */
838 sel.bx = sel.ex;
839 while(sel.bx > 0 && term.line[sel.ey][sel.bx-1].state & GLYPH_SET &&
840 term.line[sel.ey][sel.bx-1].c[0] != ' ') {
841 sel.bx--;
842 }
843 sel.b.x = sel.bx;
844 while(sel.ex < term.col-1 && term.line[sel.ey][sel.ex+1].state & GLYPH_SET &&
845 term.line[sel.ey][sel.ex+1].c[0] != ' ') {
846 sel.ex++;
847 }
848 sel.e.x = sel.ex;
849 sel.b.y = sel.e.y = sel.ey;
850 selcopy();
851 }
852 } else {
853 selcopy();
854 }
855 }
856
857 memcpy(&sel.tclick2, &sel.tclick1, sizeof(struct timeval));
858 gettimeofday(&sel.tclick1, NULL);
859 }
860
861 void
862 bmotion(XEvent *e) {
863 int starty, endy, oldey, oldex;
864
865 if(IS_SET(MODE_MOUSE)) {
866 mousereport(e);
867 return;
868 }
869
870 if(sel.mode) {
871 oldey = sel.ey;
872 oldex = sel.ex;
873 getbuttoninfo(e);
874
875 if(oldey != sel.ey || oldex != sel.ex) {
876 starty = MIN(oldey, sel.ey);
877 endy = MAX(oldey, sel.ey);
878 tsetdirt(starty, endy);
879 }
880 }
881 }
882
883 void
884 die(const char *errstr, ...) {
885 va_list ap;
886
887 va_start(ap, errstr);
888 vfprintf(stderr, errstr, ap);
889 va_end(ap);
890 exit(EXIT_FAILURE);
891 }
892
893 void
894 execsh(void) {
895 char **args;
896 char *envshell = getenv("SHELL");
897 const struct passwd *pass = getpwuid(getuid());
898 char buf[sizeof(long) * 8 + 1];
899
900 unsetenv("COLUMNS");
901 unsetenv("LINES");
902 unsetenv("TERMCAP");
903
904 if(pass) {
905 setenv("LOGNAME", pass->pw_name, 1);
906 setenv("USER", pass->pw_name, 1);
907 setenv("SHELL", pass->pw_shell, 0);
908 setenv("HOME", pass->pw_dir, 0);
909 }
910
911 snprintf(buf, sizeof(buf), "%lu", xw.win);
912 setenv("WINDOWID", buf, 1);
913
914 signal(SIGCHLD, SIG_DFL);
915 signal(SIGHUP, SIG_DFL);
916 signal(SIGINT, SIG_DFL);
917 signal(SIGQUIT, SIG_DFL);
918 signal(SIGTERM, SIG_DFL);
919 signal(SIGALRM, SIG_DFL);
920
921 DEFAULT(envshell, shell);
922 setenv("TERM", termname, 1);
923 args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
924 execvp(args[0], args);
925 exit(EXIT_FAILURE);
926 }
927
928 void
929 sigchld(int a) {
930 int stat = 0;
931
932 if(waitpid(pid, &stat, 0) < 0)
933 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
934
935 if(WIFEXITED(stat)) {
936 exit(WEXITSTATUS(stat));
937 } else {
938 exit(EXIT_FAILURE);
939 }
940 }
941
942 void
943 ttynew(void) {
944 int m, s;
945 struct winsize w = {term.row, term.col, 0, 0};
946
947 /* seems to work fine on linux, openbsd and freebsd */
948 if(openpty(&m, &s, NULL, NULL, &w) < 0)
949 die("openpty failed: %s\n", SERRNO);
950
951 switch(pid = fork()) {
952 case -1:
953 die("fork failed\n");
954 break;
955 case 0:
956 setsid(); /* create a new process group */
957 dup2(s, STDIN_FILENO);
958 dup2(s, STDOUT_FILENO);
959 dup2(s, STDERR_FILENO);
960 if(ioctl(s, TIOCSCTTY, NULL) < 0)
961 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
962 close(s);
963 close(m);
964 execsh();
965 break;
966 default:
967 close(s);
968 cmdfd = m;
969 signal(SIGCHLD, sigchld);
970 if(opt_io) {
971 iofd = (!strcmp(opt_io, "-")) ?
972 STDOUT_FILENO :
973 open(opt_io, O_WRONLY | O_CREAT, 0666);
974 if(iofd < 0) {
975 fprintf(stderr, "Error opening %s:%s\n",
976 opt_io, strerror(errno));
977 }
978 }
979 }
980 }
981
982 void
983 dump(char c) {
984 static int col;
985
986 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
987 if(++col % 10 == 0)
988 fprintf(stderr, "\n");
989 }
990
991 void
992 ttyread(void) {
993 static char buf[BUFSIZ];
994 static int buflen = 0;
995 char *ptr;
996 char s[UTF_SIZ];
997 int charsize; /* size of utf8 char in bytes */
998 long utf8c;
999 int ret;
1000
1001 /* append read bytes to unprocessed bytes */
1002 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1003 die("Couldn't read from shell: %s\n", SERRNO);
1004
1005 /* process every complete utf8 char */
1006 buflen += ret;
1007 ptr = buf;
1008 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
1009 charsize = utf8decode(ptr, &utf8c);
1010 utf8encode(&utf8c, s);
1011 tputc(s, charsize);
1012 ptr += charsize;
1013 buflen -= charsize;
1014 }
1015
1016 /* keep any uncomplete utf8 char for the next call */
1017 memmove(buf, ptr, buflen);
1018 }
1019
1020 void
1021 ttywrite(const char *s, size_t n) {
1022 if(write(cmdfd, s, n) == -1)
1023 die("write error on tty: %s\n", SERRNO);
1024 }
1025
1026 void
1027 ttyresize(void) {
1028 struct winsize w;
1029
1030 w.ws_row = term.row;
1031 w.ws_col = term.col;
1032 w.ws_xpixel = xw.tw;
1033 w.ws_ypixel = xw.th;
1034 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1035 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
1036 }
1037
1038 void
1039 tsetdirt(int top, int bot) {
1040 int i;
1041
1042 LIMIT(top, 0, term.row-1);
1043 LIMIT(bot, 0, term.row-1);
1044
1045 for(i = top; i <= bot; i++)
1046 term.dirty[i] = 1;
1047 }
1048
1049 void
1050 tfulldirt(void) {
1051 tsetdirt(0, term.row-1);
1052 }
1053
1054 void
1055 tcursor(int mode) {
1056 static TCursor c;
1057
1058 if(mode == CURSOR_SAVE) {
1059 c = term.c;
1060 } else if(mode == CURSOR_LOAD) {
1061 term.c = c;
1062 tmoveto(c.x, c.y);
1063 }
1064 }
1065
1066 void
1067 treset(void) {
1068 uint i;
1069
1070 term.c = (TCursor){{
1071 .mode = ATTR_NULL,
1072 .fg = defaultfg,
1073 .bg = defaultbg
1074 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1075
1076 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1077 for(i = tabspaces; i < term.col; i += tabspaces)
1078 term.tabs[i] = 1;
1079 term.top = 0;
1080 term.bot = term.row - 1;
1081 term.mode = MODE_WRAP;
1082
1083 tclearregion(0, 0, term.col-1, term.row-1);
1084 tmoveto(0, 0);
1085 tcursor(CURSOR_SAVE);
1086 }
1087
1088 void
1089 tnew(int col, int row) {
1090 /* set screen size */
1091 term.row = row;
1092 term.col = col;
1093 term.line = xmalloc(term.row * sizeof(Line));
1094 term.alt = xmalloc(term.row * sizeof(Line));
1095 term.dirty = xmalloc(term.row * sizeof(*term.dirty));
1096 term.tabs = xmalloc(term.col * sizeof(*term.tabs));
1097
1098 for(row = 0; row < term.row; row++) {
1099 term.line[row] = xmalloc(term.col * sizeof(Glyph));
1100 term.alt [row] = xmalloc(term.col * sizeof(Glyph));
1101 term.dirty[row] = 0;
1102 }
1103 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1104 /* setup screen */
1105 treset();
1106 }
1107
1108 void
1109 tswapscreen(void) {
1110 Line *tmp = term.line;
1111
1112 term.line = term.alt;
1113 term.alt = tmp;
1114 term.mode ^= MODE_ALTSCREEN;
1115 tfulldirt();
1116 }
1117
1118 void
1119 tscrolldown(int orig, int n) {
1120 int i;
1121 Line temp;
1122
1123 LIMIT(n, 0, term.bot-orig+1);
1124
1125 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1126
1127 for(i = term.bot; i >= orig+n; i--) {
1128 temp = term.line[i];
1129 term.line[i] = term.line[i-n];
1130 term.line[i-n] = temp;
1131
1132 term.dirty[i] = 1;
1133 term.dirty[i-n] = 1;
1134 }
1135
1136 selscroll(orig, n);
1137 }
1138
1139 void
1140 tscrollup(int orig, int n) {
1141 int i;
1142 Line temp;
1143 LIMIT(n, 0, term.bot-orig+1);
1144
1145 tclearregion(0, orig, term.col-1, orig+n-1);
1146
1147 for(i = orig; i <= term.bot-n; i++) {
1148 temp = term.line[i];
1149 term.line[i] = term.line[i+n];
1150 term.line[i+n] = temp;
1151
1152 term.dirty[i] = 1;
1153 term.dirty[i+n] = 1;
1154 }
1155
1156 selscroll(orig, -n);
1157 }
1158
1159 void
1160 selscroll(int orig, int n) {
1161 if(sel.bx == -1)
1162 return;
1163
1164 if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
1165 if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
1166 sel.bx = -1;
1167 return;
1168 }
1169 if(sel.by < term.top) {
1170 sel.by = term.top;
1171 sel.bx = 0;
1172 }
1173 if(sel.ey > term.bot) {
1174 sel.ey = term.bot;
1175 sel.ex = term.col;
1176 }
1177 sel.b.y = sel.by, sel.b.x = sel.bx;
1178 sel.e.y = sel.ey, sel.e.x = sel.ex;
1179 }
1180 }
1181
1182 void
1183 tnewline(int first_col) {
1184 int y = term.c.y;
1185
1186 if(y == term.bot) {
1187 tscrollup(term.top, 1);
1188 } else {
1189 y++;
1190 }
1191 tmoveto(first_col ? 0 : term.c.x, y);
1192 }
1193
1194 void
1195 csiparse(void) {
1196 /* int noarg = 1; */
1197 char *p = csiescseq.buf;
1198
1199 csiescseq.narg = 0;
1200 if(*p == '?')
1201 csiescseq.priv = 1, p++;
1202
1203 while(p < csiescseq.buf+csiescseq.len) {
1204 while(isdigit(*p)) {
1205 csiescseq.arg[csiescseq.narg] *= 10;
1206 csiescseq.arg[csiescseq.narg] += *p++ - '0'/*, noarg = 0 */;
1207 }
1208 if(*p == ';' && csiescseq.narg+1 < ESC_ARG_SIZ) {
1209 csiescseq.narg++, p++;
1210 } else {
1211 csiescseq.mode = *p;
1212 csiescseq.narg++;
1213
1214 return;
1215 }
1216 }
1217 }
1218
1219 /* for absolute user moves, when decom is set */
1220 void
1221 tmoveato(int x, int y) {
1222 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1223 }
1224
1225 void
1226 tmoveto(int x, int y) {
1227 int miny, maxy;
1228
1229 if(term.c.state & CURSOR_ORIGIN) {
1230 miny = term.top;
1231 maxy = term.bot;
1232 } else {
1233 miny = 0;
1234 maxy = term.row - 1;
1235 }
1236 LIMIT(x, 0, term.col-1);
1237 LIMIT(y, miny, maxy);
1238 term.c.state &= ~CURSOR_WRAPNEXT;
1239 term.c.x = x;
1240 term.c.y = y;
1241 }
1242
1243 void
1244 tsetchar(char *c, Glyph *attr, int x, int y) {
1245 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1246 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1247 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1248 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1249 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1250 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1251 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1252 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1253 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1254 };
1255
1256 /*
1257 * The table is proudly stolen from rxvt.
1258 */
1259 if(attr->mode & ATTR_GFX) {
1260 if(c[0] >= 0x41 && c[0] <= 0x7e
1261 && vt100_0[c[0] - 0x41]) {
1262 c = vt100_0[c[0] - 0x41];
1263 }
1264 }
1265
1266 term.dirty[y] = 1;
1267 term.line[y][x] = *attr;
1268 memcpy(term.line[y][x].c, c, UTF_SIZ);
1269 term.line[y][x].state |= GLYPH_SET;
1270 }
1271
1272 void
1273 tclearregion(int x1, int y1, int x2, int y2) {
1274 int x, y, temp;
1275
1276 if(x1 > x2)
1277 temp = x1, x1 = x2, x2 = temp;
1278 if(y1 > y2)
1279 temp = y1, y1 = y2, y2 = temp;
1280
1281 LIMIT(x1, 0, term.col-1);
1282 LIMIT(x2, 0, term.col-1);
1283 LIMIT(y1, 0, term.row-1);
1284 LIMIT(y2, 0, term.row-1);
1285
1286 for(y = y1; y <= y2; y++) {
1287 term.dirty[y] = 1;
1288 for(x = x1; x <= x2; x++)
1289 term.line[y][x].state = 0;
1290 }
1291 }
1292
1293 void
1294 tdeletechar(int n) {
1295 int src = term.c.x + n;
1296 int dst = term.c.x;
1297 int size = term.col - src;
1298
1299 term.dirty[term.c.y] = 1;
1300
1301 if(src >= term.col) {
1302 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1303 return;
1304 }
1305
1306 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1307 size * sizeof(Glyph));
1308 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1309 }
1310
1311 void
1312 tinsertblank(int n) {
1313 int src = term.c.x;
1314 int dst = src + n;
1315 int size = term.col - dst;
1316
1317 term.dirty[term.c.y] = 1;
1318
1319 if(dst >= term.col) {
1320 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1321 return;
1322 }
1323
1324 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1325 size * sizeof(Glyph));
1326 tclearregion(src, term.c.y, dst - 1, term.c.y);
1327 }
1328
1329 void
1330 tinsertblankline(int n) {
1331 if(term.c.y < term.top || term.c.y > term.bot)
1332 return;
1333
1334 tscrolldown(term.c.y, n);
1335 }
1336
1337 void
1338 tdeleteline(int n) {
1339 if(term.c.y < term.top || term.c.y > term.bot)
1340 return;
1341
1342 tscrollup(term.c.y, n);
1343 }
1344
1345 void
1346 tsetattr(int *attr, int l) {
1347 int i;
1348
1349 for(i = 0; i < l; i++) {
1350 switch(attr[i]) {
1351 case 0:
1352 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD \
1353 | ATTR_ITALIC | ATTR_BLINK);
1354 term.c.attr.fg = defaultfg;
1355 term.c.attr.bg = defaultbg;
1356 break;
1357 case 1:
1358 term.c.attr.mode |= ATTR_BOLD;
1359 break;
1360 case 3: /* enter standout (highlight) */
1361 term.c.attr.mode |= ATTR_ITALIC;
1362 break;
1363 case 4:
1364 term.c.attr.mode |= ATTR_UNDERLINE;
1365 break;
1366 case 5:
1367 term.c.attr.mode |= ATTR_BLINK;
1368 break;
1369 case 7:
1370 term.c.attr.mode |= ATTR_REVERSE;
1371 break;
1372 case 21:
1373 case 22:
1374 term.c.attr.mode &= ~ATTR_BOLD;
1375 break;
1376 case 23: /* leave standout (highlight) mode */
1377 term.c.attr.mode &= ~ATTR_ITALIC;
1378 break;
1379 case 24:
1380 term.c.attr.mode &= ~ATTR_UNDERLINE;
1381 break;
1382 case 25:
1383 term.c.attr.mode &= ~ATTR_BLINK;
1384 break;
1385 case 27:
1386 term.c.attr.mode &= ~ATTR_REVERSE;
1387 break;
1388 case 38:
1389 if(i + 2 < l && attr[i + 1] == 5) {
1390 i += 2;
1391 if(BETWEEN(attr[i], 0, 255)) {
1392 term.c.attr.fg = attr[i];
1393 } else {
1394 fprintf(stderr,
1395 "erresc: bad fgcolor %d\n",
1396 attr[i]);
1397 }
1398 } else {
1399 fprintf(stderr,
1400 "erresc(38): gfx attr %d unknown\n",
1401 attr[i]);
1402 }
1403 break;
1404 case 39:
1405 term.c.attr.fg = defaultfg;
1406 break;
1407 case 48:
1408 if(i + 2 < l && attr[i + 1] == 5) {
1409 i += 2;
1410 if(BETWEEN(attr[i], 0, 255)) {
1411 term.c.attr.bg = attr[i];
1412 } else {
1413 fprintf(stderr,
1414 "erresc: bad bgcolor %d\n",
1415 attr[i]);
1416 }
1417 } else {
1418 fprintf(stderr,
1419 "erresc(48): gfx attr %d unknown\n",
1420 attr[i]);
1421 }
1422 break;
1423 case 49:
1424 term.c.attr.bg = defaultbg;
1425 break;
1426 default:
1427 if(BETWEEN(attr[i], 30, 37)) {
1428 term.c.attr.fg = attr[i] - 30;
1429 } else if(BETWEEN(attr[i], 40, 47)) {
1430 term.c.attr.bg = attr[i] - 40;
1431 } else if(BETWEEN(attr[i], 90, 97)) {
1432 term.c.attr.fg = attr[i] - 90 + 8;
1433 } else if(BETWEEN(attr[i], 100, 107)) {
1434 term.c.attr.bg = attr[i] - 100 + 8;
1435 } else {
1436 fprintf(stderr,
1437 "erresc(default): gfx attr %d unknown\n",
1438 attr[i]), csidump();
1439 }
1440 break;
1441 }
1442 }
1443 }
1444
1445 void
1446 tsetscroll(int t, int b) {
1447 int temp;
1448
1449 LIMIT(t, 0, term.row-1);
1450 LIMIT(b, 0, term.row-1);
1451 if(t > b) {
1452 temp = t;
1453 t = b;
1454 b = temp;
1455 }
1456 term.top = t;
1457 term.bot = b;
1458 }
1459
1460 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1461
1462 void
1463 tsetmode(bool priv, bool set, int *args, int narg) {
1464 int *lim, mode;
1465 bool alt;
1466
1467 for(lim = args + narg; args < lim; ++args) {
1468 if(priv) {
1469 switch(*args) {
1470 break;
1471 case 1: /* DECCKM -- Cursor key */
1472 MODBIT(term.mode, set, MODE_APPCURSOR);
1473 break;
1474 case 5: /* DECSCNM -- Reverse video */
1475 mode = term.mode;
1476 MODBIT(term.mode, set, MODE_REVERSE);
1477 if(mode != term.mode)
1478 redraw();
1479 break;
1480 case 6: /* DECOM -- Origin */
1481 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1482 tmoveato(0, 0);
1483 break;
1484 case 7: /* DECAWM -- Auto wrap */
1485 MODBIT(term.mode, set, MODE_WRAP);
1486 break;
1487 case 0: /* Error (IGNORED) */
1488 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1489 case 3: /* DECCOLM -- Column (IGNORED) */
1490 case 4: /* DECSCLM -- Scroll (IGNORED) */
1491 case 8: /* DECARM -- Auto repeat (IGNORED) */
1492 case 18: /* DECPFF -- Printer feed (IGNORED) */
1493 case 19: /* DECPEX -- Printer extent (IGNORED) */
1494 case 42: /* DECNRCM -- National characters (IGNORED) */
1495 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1496 break;
1497 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1498 MODBIT(term.mode, !set, MODE_HIDE);
1499 break;
1500 case 1000: /* 1000,1002: enable xterm mouse report */
1501 MODBIT(term.mode, set, MODE_MOUSEBTN);
1502 break;
1503 case 1002:
1504 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1505 break;
1506 case 1049: /* = 1047 and 1048 */
1507 case 47:
1508 case 1047: {
1509 alt = IS_SET(MODE_ALTSCREEN) != 0;
1510 if(alt)
1511 tclearregion(0, 0, term.col-1, term.row-1);
1512 if(set ^ alt) /* set is always 1 or 0 */
1513 tswapscreen();
1514 if(*args != 1049)
1515 break;
1516 }
1517 /* pass through */
1518 case 1048:
1519 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1520 break;
1521 default:
1522 fprintf(stderr,
1523 "erresc: unknown private set/reset mode %d\n",
1524 *args);
1525 break;
1526 }
1527 } else {
1528 switch(*args) {
1529 case 0: /* Error (IGNORED) */
1530 break;
1531 case 2: /* KAM -- keyboard action */
1532 MODBIT(term.mode, set, MODE_KBDLOCK);
1533 break;
1534 case 4: /* IRM -- Insertion-replacement */
1535 MODBIT(term.mode, set, MODE_INSERT);
1536 break;
1537 case 12: /* SRM -- Send/Receive */
1538 MODBIT(term.mode, !set, MODE_ECHO);
1539 break;
1540 case 20: /* LNM -- Linefeed/new line */
1541 MODBIT(term.mode, set, MODE_CRLF);
1542 break;
1543 default:
1544 fprintf(stderr,
1545 "erresc: unknown set/reset mode %d\n",
1546 *args);
1547 break;
1548 }
1549 }
1550 }
1551 }
1552 #undef MODBIT
1553
1554
1555 void
1556 csihandle(void) {
1557 switch(csiescseq.mode) {
1558 default:
1559 unknown:
1560 fprintf(stderr, "erresc: unknown csi ");
1561 csidump();
1562 /* die(""); */
1563 break;
1564 case '@': /* ICH -- Insert <n> blank char */
1565 DEFAULT(csiescseq.arg[0], 1);
1566 tinsertblank(csiescseq.arg[0]);
1567 break;
1568 case 'A': /* CUU -- Cursor <n> Up */
1569 DEFAULT(csiescseq.arg[0], 1);
1570 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1571 break;
1572 case 'B': /* CUD -- Cursor <n> Down */
1573 case 'e': /* VPR --Cursor <n> Down */
1574 DEFAULT(csiescseq.arg[0], 1);
1575 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1576 break;
1577 case 'c': /* DA -- Device Attributes */
1578 if(csiescseq.arg[0] == 0)
1579 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1580 break;
1581 case 'C': /* CUF -- Cursor <n> Forward */
1582 case 'a': /* HPR -- Cursor <n> Forward */
1583 DEFAULT(csiescseq.arg[0], 1);
1584 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1585 break;
1586 case 'D': /* CUB -- Cursor <n> Backward */
1587 DEFAULT(csiescseq.arg[0], 1);
1588 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1589 break;
1590 case 'E': /* CNL -- Cursor <n> Down and first col */
1591 DEFAULT(csiescseq.arg[0], 1);
1592 tmoveto(0, term.c.y+csiescseq.arg[0]);
1593 break;
1594 case 'F': /* CPL -- Cursor <n> Up and first col */
1595 DEFAULT(csiescseq.arg[0], 1);
1596 tmoveto(0, term.c.y-csiescseq.arg[0]);
1597 break;
1598 case 'g': /* TBC -- Tabulation clear */
1599 switch (csiescseq.arg[0]) {
1600 case 0: /* clear current tab stop */
1601 term.tabs[term.c.x] = 0;
1602 break;
1603 case 3: /* clear all the tabs */
1604 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1605 break;
1606 default:
1607 goto unknown;
1608 }
1609 break;
1610 case 'G': /* CHA -- Move to <col> */
1611 case '`': /* HPA */
1612 DEFAULT(csiescseq.arg[0], 1);
1613 tmoveto(csiescseq.arg[0]-1, term.c.y);
1614 break;
1615 case 'H': /* CUP -- Move to <row> <col> */
1616 case 'f': /* HVP */
1617 DEFAULT(csiescseq.arg[0], 1);
1618 DEFAULT(csiescseq.arg[1], 1);
1619 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1620 break;
1621 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1622 DEFAULT(csiescseq.arg[0], 1);
1623 while(csiescseq.arg[0]--)
1624 tputtab(1);
1625 break;
1626 case 'J': /* ED -- Clear screen */
1627 sel.bx = -1;
1628 switch(csiescseq.arg[0]) {
1629 case 0: /* below */
1630 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1631 if(term.c.y < term.row-1)
1632 tclearregion(0, term.c.y+1, term.col-1, term.row-1);
1633 break;
1634 case 1: /* above */
1635 if(term.c.y > 1)
1636 tclearregion(0, 0, term.col-1, term.c.y-1);
1637 tclearregion(0, term.c.y, term.c.x, term.c.y);
1638 break;
1639 case 2: /* all */
1640 tclearregion(0, 0, term.col-1, term.row-1);
1641 break;
1642 default:
1643 goto unknown;
1644 }
1645 break;
1646 case 'K': /* EL -- Clear line */
1647 switch(csiescseq.arg[0]) {
1648 case 0: /* right */
1649 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1650 break;
1651 case 1: /* left */
1652 tclearregion(0, term.c.y, term.c.x, term.c.y);
1653 break;
1654 case 2: /* all */
1655 tclearregion(0, term.c.y, term.col-1, term.c.y);
1656 break;
1657 }
1658 break;
1659 case 'S': /* SU -- Scroll <n> line up */
1660 DEFAULT(csiescseq.arg[0], 1);
1661 tscrollup(term.top, csiescseq.arg[0]);
1662 break;
1663 case 'T': /* SD -- Scroll <n> line down */
1664 DEFAULT(csiescseq.arg[0], 1);
1665 tscrolldown(term.top, csiescseq.arg[0]);
1666 break;
1667 case 'L': /* IL -- Insert <n> blank lines */
1668 DEFAULT(csiescseq.arg[0], 1);
1669 tinsertblankline(csiescseq.arg[0]);
1670 break;
1671 case 'l': /* RM -- Reset Mode */
1672 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
1673 break;
1674 case 'M': /* DL -- Delete <n> lines */
1675 DEFAULT(csiescseq.arg[0], 1);
1676 tdeleteline(csiescseq.arg[0]);
1677 break;
1678 case 'X': /* ECH -- Erase <n> char */
1679 DEFAULT(csiescseq.arg[0], 1);
1680 tclearregion(term.c.x, term.c.y, term.c.x + csiescseq.arg[0], term.c.y);
1681 break;
1682 case 'P': /* DCH -- Delete <n> char */
1683 DEFAULT(csiescseq.arg[0], 1);
1684 tdeletechar(csiescseq.arg[0]);
1685 break;
1686 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
1687 DEFAULT(csiescseq.arg[0], 1);
1688 while(csiescseq.arg[0]--)
1689 tputtab(0);
1690 break;
1691 case 'd': /* VPA -- Move to <row> */
1692 DEFAULT(csiescseq.arg[0], 1);
1693 tmoveato(term.c.x, csiescseq.arg[0]-1);
1694 break;
1695 case 'h': /* SM -- Set terminal mode */
1696 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
1697 break;
1698 case 'm': /* SGR -- Terminal attribute (color) */
1699 tsetattr(csiescseq.arg, csiescseq.narg);
1700 break;
1701 case 'r': /* DECSTBM -- Set Scrolling Region */
1702 if(csiescseq.priv) {
1703 goto unknown;
1704 } else {
1705 DEFAULT(csiescseq.arg[0], 1);
1706 DEFAULT(csiescseq.arg[1], term.row);
1707 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
1708 tmoveato(0, 0);
1709 }
1710 break;
1711 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1712 tcursor(CURSOR_SAVE);
1713 break;
1714 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1715 tcursor(CURSOR_LOAD);
1716 break;
1717 }
1718 }
1719
1720 void
1721 csidump(void) {
1722 int i;
1723 uint c;
1724
1725 printf("ESC[");
1726 for(i = 0; i < csiescseq.len; i++) {
1727 c = csiescseq.buf[i] & 0xff;
1728 if(isprint(c)) {
1729 putchar(c);
1730 } else if(c == '\n') {
1731 printf("(\\n)");
1732 } else if(c == '\r') {
1733 printf("(\\r)");
1734 } else if(c == 0x1b) {
1735 printf("(\\e)");
1736 } else {
1737 printf("(%02x)", c);
1738 }
1739 }
1740 putchar('\n');
1741 }
1742
1743 void
1744 csireset(void) {
1745 memset(&csiescseq, 0, sizeof(csiescseq));
1746 }
1747
1748 void
1749 strhandle(void) {
1750 char *p;
1751
1752 /*
1753 * TODO: make this being useful in case of color palette change.
1754 */
1755 strparse();
1756
1757 p = strescseq.buf;
1758
1759 switch(strescseq.type) {
1760 case ']': /* OSC -- Operating System Command */
1761 switch(p[0]) {
1762 case '0':
1763 case '1':
1764 case '2':
1765 /*
1766 * TODO: Handle special chars in string, like umlauts.
1767 */
1768 if(p[1] == ';') {
1769 XStoreName(xw.dpy, xw.win, strescseq.buf+2);
1770 }
1771 break;
1772 case ';':
1773 XStoreName(xw.dpy, xw.win, strescseq.buf+1);
1774 break;
1775 case '4': /* TODO: Set color (arg0) to "rgb:%hexr/$hexg/$hexb" (arg1) */
1776 break;
1777 default:
1778 fprintf(stderr, "erresc: unknown str ");
1779 strdump();
1780 break;
1781 }
1782 break;
1783 case 'k': /* old title set compatibility */
1784 XStoreName(xw.dpy, xw.win, strescseq.buf);
1785 break;
1786 case 'P': /* DSC -- Device Control String */
1787 case '_': /* APC -- Application Program Command */
1788 case '^': /* PM -- Privacy Message */
1789 default:
1790 fprintf(stderr, "erresc: unknown str ");
1791 strdump();
1792 /* die(""); */
1793 break;
1794 }
1795 }
1796
1797 void
1798 strparse(void) {
1799 /*
1800 * TODO: Implement parsing like for CSI when required.
1801 * Format: ESC type cmd ';' arg0 [';' argn] ESC \
1802 */
1803 return;
1804 }
1805
1806 void
1807 strdump(void) {
1808 int i;
1809 uint c;
1810
1811 printf("ESC%c", strescseq.type);
1812 for(i = 0; i < strescseq.len; i++) {
1813 c = strescseq.buf[i] & 0xff;
1814 if(isprint(c)) {
1815 putchar(c);
1816 } else if(c == '\n') {
1817 printf("(\\n)");
1818 } else if(c == '\r') {
1819 printf("(\\r)");
1820 } else if(c == 0x1b) {
1821 printf("(\\e)");
1822 } else {
1823 printf("(%02x)", c);
1824 }
1825 }
1826 printf("ESC\\\n");
1827 }
1828
1829 void
1830 strreset(void) {
1831 memset(&strescseq, 0, sizeof(strescseq));
1832 }
1833
1834 void
1835 tputtab(bool forward) {
1836 uint x = term.c.x;
1837
1838 if(forward) {
1839 if(x == term.col)
1840 return;
1841 for(++x; x < term.col && !term.tabs[x]; ++x)
1842 /* nothing */ ;
1843 } else {
1844 if(x == 0)
1845 return;
1846 for(--x; x > 0 && !term.tabs[x]; --x)
1847 /* nothing */ ;
1848 }
1849 tmoveto(x, term.c.y);
1850 }
1851
1852 void
1853 techo(char *buf, int len) {
1854 for(; len > 0; buf++, len--) {
1855 char c = *buf;
1856
1857 if(c == '\033') { /* escape */
1858 tputc("^", 1);
1859 tputc("[", 1);
1860 } else if (c < '\x20') { /* control code */
1861 if(c != '\n' && c != '\r' && c != '\t') {
1862 c |= '\x40';
1863 tputc("^", 1);
1864 }
1865 tputc(&c, 1);
1866 } else {
1867 break;
1868 }
1869 }
1870 if (len)
1871 tputc(buf, len);
1872 }
1873
1874 void
1875 tputc(char *c, int len) {
1876 uchar ascii = *c;
1877 bool control = ascii < '\x20' || ascii == 0177;
1878
1879 if(iofd != -1) {
1880 if (xwrite(iofd, c, len) < 0) {
1881 fprintf(stderr, "Error writting in %s:%s\n",
1882 opt_io, strerror(errno));
1883 close(iofd);
1884 iofd = -1;
1885 }
1886 }
1887 /*
1888 * STR sequences must be checked before anything else
1889 * because it can use some control codes as part of the sequence.
1890 */
1891 if(term.esc & ESC_STR) {
1892 switch(ascii) {
1893 case '\033':
1894 term.esc = ESC_START | ESC_STR_END;
1895 break;
1896 case '\a': /* backwards compatibility to xterm */
1897 term.esc = 0;
1898 strhandle();
1899 break;
1900 default:
1901 strescseq.buf[strescseq.len++] = ascii;
1902 if(strescseq.len+1 >= STR_BUF_SIZ) {
1903 term.esc = 0;
1904 strhandle();
1905 }
1906 }
1907 return;
1908 }
1909
1910 /*
1911 * Actions of control codes must be performed as soon they arrive
1912 * because they can be embedded inside a control sequence, and
1913 * they must not cause conflicts with sequences.
1914 */
1915 if(control) {
1916 switch(ascii) {
1917 case '\t': /* HT */
1918 tputtab(1);
1919 return;
1920 case '\b': /* BS */
1921 tmoveto(term.c.x-1, term.c.y);
1922 return;
1923 case '\r': /* CR */
1924 tmoveto(0, term.c.y);
1925 return;
1926 case '\f': /* LF */
1927 case '\v': /* VT */
1928 case '\n': /* LF */
1929 /* go to first col if the mode is set */
1930 tnewline(IS_SET(MODE_CRLF));
1931 return;
1932 case '\a': /* BEL */
1933 if(!(xw.state & WIN_FOCUSED))
1934 xseturgency(1);
1935 return;
1936 case '\033': /* ESC */
1937 csireset();
1938 term.esc = ESC_START;
1939 return;
1940 case '\016': /* SO */
1941 term.c.attr.mode |= ATTR_GFX;
1942 return;
1943 case '\017': /* SI */
1944 term.c.attr.mode &= ~ATTR_GFX;
1945 return;
1946 case '\032': /* SUB */
1947 case '\030': /* CAN */
1948 csireset();
1949 return;
1950 case '\005': /* ENQ (IGNORED) */
1951 case '\000': /* NUL (IGNORED) */
1952 case '\021': /* XON (IGNORED) */
1953 case '\023': /* XOFF (IGNORED) */
1954 case 0177: /* DEL (IGNORED) */
1955 return;
1956 }
1957 } else if(term.esc & ESC_START) {
1958 if(term.esc & ESC_CSI) {
1959 csiescseq.buf[csiescseq.len++] = ascii;
1960 if(BETWEEN(ascii, 0x40, 0x7E)
1961 || csiescseq.len >= ESC_BUF_SIZ) {
1962 term.esc = 0;
1963 csiparse(), csihandle();
1964 }
1965 } else if(term.esc & ESC_STR_END) {
1966 term.esc = 0;
1967 if(ascii == '\\')
1968 strhandle();
1969 } else if(term.esc & ESC_ALTCHARSET) {
1970 switch(ascii) {
1971 case '0': /* Line drawing set */
1972 term.c.attr.mode |= ATTR_GFX;
1973 break;
1974 case 'B': /* USASCII */
1975 term.c.attr.mode &= ~ATTR_GFX;
1976 break;
1977 case 'A': /* UK (IGNORED) */
1978 case '<': /* multinational charset (IGNORED) */
1979 case '5': /* Finnish (IGNORED) */
1980 case 'C': /* Finnish (IGNORED) */
1981 case 'K': /* German (IGNORED) */
1982 break;
1983 default:
1984 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
1985 }
1986 term.esc = 0;
1987 } else if(term.esc & ESC_TEST) {
1988 if(ascii == '8') { /* DEC screen alignment test. */
1989 char E[UTF_SIZ] = "E";
1990 int x, y;
1991
1992 for(x = 0; x < term.col; ++x) {
1993 for(y = 0; y < term.row; ++y)
1994 tsetchar(E, &term.c.attr, x, y);
1995 }
1996 }
1997 term.esc = 0;
1998 } else {
1999 switch(ascii) {
2000 case '[':
2001 term.esc |= ESC_CSI;
2002 break;
2003 case '#':
2004 term.esc |= ESC_TEST;
2005 break;
2006 case 'P': /* DCS -- Device Control String */
2007 case '_': /* APC -- Application Program Command */
2008 case '^': /* PM -- Privacy Message */
2009 case ']': /* OSC -- Operating System Command */
2010 case 'k': /* old title set compatibility */
2011 strreset();
2012 strescseq.type = ascii;
2013 term.esc |= ESC_STR;
2014 break;
2015 case '(': /* set primary charset G0 */
2016 term.esc |= ESC_ALTCHARSET;
2017 break;
2018 case ')': /* set secondary charset G1 (IGNORED) */
2019 case '*': /* set tertiary charset G2 (IGNORED) */
2020 case '+': /* set quaternary charset G3 (IGNORED) */
2021 term.esc = 0;
2022 break;
2023 case 'D': /* IND -- Linefeed */
2024 if(term.c.y == term.bot) {
2025 tscrollup(term.top, 1);
2026 } else {
2027 tmoveto(term.c.x, term.c.y+1);
2028 }
2029 term.esc = 0;
2030 break;
2031 case 'E': /* NEL -- Next line */
2032 tnewline(1); /* always go to first col */
2033 term.esc = 0;
2034 break;
2035 case 'H': /* HTS -- Horizontal tab stop */
2036 term.tabs[term.c.x] = 1;
2037 term.esc = 0;
2038 break;
2039 case 'M': /* RI -- Reverse index */
2040 if(term.c.y == term.top) {
2041 tscrolldown(term.top, 1);
2042 } else {
2043 tmoveto(term.c.x, term.c.y-1);
2044 }
2045 term.esc = 0;
2046 break;
2047 case 'Z': /* DECID -- Identify Terminal */
2048 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2049 term.esc = 0;
2050 break;
2051 case 'c': /* RIS -- Reset to inital state */
2052 treset();
2053 term.esc = 0;
2054 xresettitle();
2055 break;
2056 case '=': /* DECPAM -- Application keypad */
2057 term.mode |= MODE_APPKEYPAD;
2058 term.esc = 0;
2059 break;
2060 case '>': /* DECPNM -- Normal keypad */
2061 term.mode &= ~MODE_APPKEYPAD;
2062 term.esc = 0;
2063 break;
2064 case '7': /* DECSC -- Save Cursor */
2065 tcursor(CURSOR_SAVE);
2066 term.esc = 0;
2067 break;
2068 case '8': /* DECRC -- Restore Cursor */
2069 tcursor(CURSOR_LOAD);
2070 term.esc = 0;
2071 break;
2072 case '\\': /* ST -- Stop */
2073 term.esc = 0;
2074 break;
2075 default:
2076 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2077 (uchar) ascii, isprint(ascii)? ascii:'.');
2078 term.esc = 0;
2079 }
2080 }
2081 /*
2082 * All characters which form part of a sequence are not
2083 * printed
2084 */
2085 return;
2086 }
2087 /*
2088 * Display control codes only if we are in graphic mode
2089 */
2090 if(control && !(term.c.attr.mode & ATTR_GFX))
2091 return;
2092 if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
2093 sel.bx = -1;
2094 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
2095 tnewline(1); /* always go to first col */
2096
2097 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col) {
2098 memmove(&term.line[term.c.y][term.c.x+1],
2099 &term.line[term.c.y][term.c.x],
2100 (term.col - term.c.x - 1) * sizeof(Glyph));
2101 }
2102
2103 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2104 if(term.c.x+1 < term.col) {
2105 tmoveto(term.c.x+1, term.c.y);
2106 } else {
2107 term.c.state |= CURSOR_WRAPNEXT;
2108 }
2109 }
2110
2111 int
2112 tresize(int col, int row) {
2113 int i, x;
2114 int minrow = MIN(row, term.row);
2115 int mincol = MIN(col, term.col);
2116 int slide = term.c.y - row + 1;
2117 bool *bp;
2118
2119 if(col < 1 || row < 1)
2120 return 0;
2121
2122 /* free unneeded rows */
2123 i = 0;
2124 if(slide > 0) {
2125 /* slide screen to keep cursor where we expect it -
2126 * tscrollup would work here, but we can optimize to
2127 * memmove because we're freeing the earlier lines */
2128 for(/* i = 0 */; i < slide; i++) {
2129 free(term.line[i]);
2130 free(term.alt[i]);
2131 }
2132 memmove(term.line, term.line + slide, row * sizeof(Line));
2133 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2134 }
2135 for(i += row; i < term.row; i++) {
2136 free(term.line[i]);
2137 free(term.alt[i]);
2138 }
2139
2140 /* resize to new height */
2141 term.line = xrealloc(term.line, row * sizeof(Line));
2142 term.alt = xrealloc(term.alt, row * sizeof(Line));
2143 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2144 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2145
2146 /* resize each row to new width, zero-pad if needed */
2147 for(i = 0; i < minrow; i++) {
2148 term.dirty[i] = 1;
2149 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2150 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2151 for(x = mincol; x < col; x++) {
2152 term.line[i][x].state = 0;
2153 term.alt[i][x].state = 0;
2154 }
2155 }
2156
2157 /* allocate any new rows */
2158 for(/* i == minrow */; i < row; i++) {
2159 term.dirty[i] = 1;
2160 term.line[i] = xcalloc(col, sizeof(Glyph));
2161 term.alt [i] = xcalloc(col, sizeof(Glyph));
2162 }
2163 if(col > term.col) {
2164 bp = term.tabs + term.col;
2165
2166 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2167 while(--bp > term.tabs && !*bp)
2168 /* nothing */ ;
2169 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2170 *bp = 1;
2171 }
2172 /* update terminal size */
2173 term.col = col;
2174 term.row = row;
2175 /* reset scrolling region */
2176 tsetscroll(0, row-1);
2177 /* make use of the LIMIT in tmoveto */
2178 tmoveto(term.c.x, term.c.y);
2179
2180 return (slide > 0);
2181 }
2182
2183 void
2184 xresize(int col, int row) {
2185 xw.tw = MAX(1, 2*borderpx + col * xw.cw);
2186 xw.th = MAX(1, 2*borderpx + row * xw.ch);
2187
2188 XftDrawChange(xw.draw, xw.buf);
2189 }
2190
2191 void
2192 xloadcols(void) {
2193 int i, r, g, b;
2194 XRenderColor color = { .alpha = 0 };
2195
2196 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
2197 for(i = 0; i < LEN(colorname); i++) {
2198 if(!colorname[i])
2199 continue;
2200 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2201 die("Could not allocate color '%s'\n", colorname[i]);
2202 }
2203 }
2204
2205 /* load colors [16-255] ; same colors as xterm */
2206 for(i = 16, r = 0; r < 6; r++) {
2207 for(g = 0; g < 6; g++) {
2208 for(b = 0; b < 6; b++) {
2209 color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
2210 color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
2211 color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
2212 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i])) {
2213 die("Could not allocate color %d\n", i);
2214 }
2215 i++;
2216 }
2217 }
2218 }
2219
2220 for(r = 0; r < 24; r++, i++) {
2221 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
2222 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color,
2223 &dc.col[i])) {
2224 die("Could not allocate color %d\n", i);
2225 }
2226 }
2227 }
2228
2229 void
2230 xtermclear(int col1, int row1, int col2, int row2) {
2231 XftDrawRect(xw.draw,
2232 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2233 borderpx + col1 * xw.cw,
2234 borderpx + row1 * xw.ch,
2235 (col2-col1+1) * xw.cw,
2236 (row2-row1+1) * xw.ch);
2237 }
2238
2239 /*
2240 * Absolute coordinates.
2241 */
2242 void
2243 xclear(int x1, int y1, int x2, int y2) {
2244 XftDrawRect(xw.draw,
2245 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2246 x1, y1, x2-x1, y2-y1);
2247 }
2248
2249 void
2250 xhints(void) {
2251 XClassHint class = {opt_class ? opt_class : termname, termname};
2252 XWMHints wm = {.flags = InputHint, .input = 1};
2253 XSizeHints *sizeh = NULL;
2254
2255 sizeh = XAllocSizeHints();
2256 if(xw.isfixed == False) {
2257 sizeh->flags = PSize | PResizeInc | PBaseSize;
2258 sizeh->height = xw.h;
2259 sizeh->width = xw.w;
2260 sizeh->height_inc = xw.ch;
2261 sizeh->width_inc = xw.cw;
2262 sizeh->base_height = 2*borderpx;
2263 sizeh->base_width = 2*borderpx;
2264 } else {
2265 sizeh->flags = PMaxSize | PMinSize;
2266 sizeh->min_width = sizeh->max_width = xw.fw;
2267 sizeh->min_height = sizeh->max_height = xw.fh;
2268 }
2269
2270 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
2271 XFree(sizeh);
2272 }
2273
2274 int
2275 xloadfont(Font *f, FcPattern *pattern) {
2276 FcPattern *match;
2277 FcResult result;
2278
2279 match = XftFontMatch(xw.dpy, xw.scr, pattern, &result);
2280 if(!match)
2281 return 1;
2282 if(!(f->set = XftFontOpenPattern(xw.dpy, match))) {
2283 FcPatternDestroy(match);
2284 return 1;
2285 }
2286
2287 f->ascent = f->set->ascent;
2288 f->descent = f->set->descent;
2289 f->lbearing = 0;
2290 f->rbearing = f->set->max_advance_width;
2291
2292 f->height = f->set->height;
2293 f->width = f->lbearing + f->rbearing;
2294
2295 return 0;
2296 }
2297
2298 void
2299 xloadfonts(char *fontstr, int fontsize) {
2300 FcPattern *pattern;
2301 FcResult result;
2302 double fontval;
2303
2304 if(fontstr[0] == '-') {
2305 pattern = XftXlfdParse(fontstr, False, False);
2306 } else {
2307 pattern = FcNameParse((FcChar8 *)fontstr);
2308 }
2309
2310 if(!pattern)
2311 die("st: can't open font %s\n", fontstr);
2312
2313 if(fontsize > 0) {
2314 FcPatternDel(pattern, FC_PIXEL_SIZE);
2315 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2316 usedfontsize = fontsize;
2317 } else {
2318 result = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2319 if(result == FcResultMatch) {
2320 usedfontsize = (int)fontval;
2321 } else {
2322 /*
2323 * Default font size is 12, if none given. This is to
2324 * have a known usedfontsize value.
2325 */
2326 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
2327 usedfontsize = 12;
2328 }
2329 }
2330
2331 if(xloadfont(&dc.font, pattern))
2332 die("st: can't open font %s\n", fontstr);
2333
2334 /* Setting character width and height. */
2335 xw.cw = dc.font.width;
2336 xw.ch = dc.font.height;
2337
2338 FcPatternDel(pattern, FC_WEIGHT);
2339 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
2340 if(xloadfont(&dc.bfont, pattern))
2341 die("st: can't open font %s\n", fontstr);
2342
2343 FcPatternDel(pattern, FC_SLANT);
2344 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
2345 if(xloadfont(&dc.ibfont, pattern))
2346 die("st: can't open font %s\n", fontstr);
2347
2348 FcPatternDel(pattern, FC_WEIGHT);
2349 if(xloadfont(&dc.ifont, pattern))
2350 die("st: can't open font %s\n", fontstr);
2351
2352 FcPatternDestroy(pattern);
2353 }
2354
2355 void
2356 xzoom(const Arg *arg)
2357 {
2358 xloadfonts(usedfont, usedfontsize + arg->i);
2359 cresize(0, 0);
2360 draw();
2361 }
2362
2363 void
2364 xinit(void) {
2365 XSetWindowAttributes attrs;
2366 Cursor cursor;
2367 Window parent;
2368 int sw, sh, major, minor;
2369
2370 if(!(xw.dpy = XOpenDisplay(NULL)))
2371 die("Can't open display\n");
2372 xw.scr = XDefaultScreen(xw.dpy);
2373 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
2374
2375 /* font */
2376 usedfont = (opt_font == NULL)? font : opt_font;
2377 xloadfonts(usedfont, 0);
2378
2379 /* colors */
2380 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
2381 xloadcols();
2382
2383 /* adjust fixed window geometry */
2384 if(xw.isfixed) {
2385 sw = DisplayWidth(xw.dpy, xw.scr);
2386 sh = DisplayHeight(xw.dpy, xw.scr);
2387 if(xw.fx < 0)
2388 xw.fx = sw + xw.fx - xw.fw - 1;
2389 if(xw.fy < 0)
2390 xw.fy = sh + xw.fy - xw.fh - 1;
2391
2392 xw.h = xw.fh;
2393 xw.w = xw.fw;
2394 } else {
2395 /* window - default size */
2396 xw.h = 2*borderpx + term.row * xw.ch;
2397 xw.w = 2*borderpx + term.col * xw.cw;
2398 xw.fx = 0;
2399 xw.fy = 0;
2400 }
2401
2402 attrs.background_pixel = dc.col[defaultbg].pixel;
2403 attrs.border_pixel = dc.col[defaultbg].pixel;
2404 attrs.bit_gravity = NorthWestGravity;
2405 attrs.event_mask = FocusChangeMask | KeyPressMask
2406 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
2407 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
2408 attrs.colormap = xw.cmap;
2409
2410 parent = opt_embed ? strtol(opt_embed, NULL, 0) : XRootWindow(xw.dpy, xw.scr);
2411 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
2412 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
2413 xw.vis,
2414 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
2415 | CWColormap,
2416 &attrs);
2417
2418 /* double buffering */
2419 if(!XdbeQueryExtension(xw.dpy, &major, &minor))
2420 die("Xdbe extension is not present\n");
2421 xw.buf = XdbeAllocateBackBufferName(xw.dpy, xw.win, XdbeCopied);
2422
2423 /* Xft rendering context */
2424 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
2425
2426 /* input methods */
2427 xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL);
2428 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
2429 | XIMStatusNothing, XNClientWindow, xw.win,
2430 XNFocusWindow, xw.win, NULL);
2431
2432 /* white cursor, black outline */
2433 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
2434 XDefineCursor(xw.dpy, xw.win, cursor);
2435 XRecolorCursor(xw.dpy, cursor,
2436 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
2437 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
2438
2439 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
2440 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
2441 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
2442
2443 xresettitle();
2444 XMapWindow(xw.dpy, xw.win);
2445 xhints();
2446 XSync(xw.dpy, 0);
2447 }
2448
2449 void
2450 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
2451 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
2452 width = charlen * xw.cw;
2453 Font *font = &dc.font;
2454 XGlyphInfo extents;
2455 Colour *fg = &dc.col[base.fg], *bg = &dc.col[base.bg],
2456 *temp, revfg, revbg;
2457 XRenderColor colfg, colbg;
2458
2459 if(base.mode & ATTR_BOLD) {
2460 if(BETWEEN(base.fg, 0, 7)) {
2461 /* basic system colors */
2462 fg = &dc.col[base.fg + 8];
2463 } else if(BETWEEN(base.fg, 16, 195)) {
2464 /* 256 colors */
2465 fg = &dc.col[base.fg + 36];
2466 } else if(BETWEEN(base.fg, 232, 251)) {
2467 /* greyscale */
2468 fg = &dc.col[base.fg + 4];
2469 }
2470 /*
2471 * Those ranges will not be brightened:
2472 * 8 - 15 – bright system colors
2473 * 196 - 231 – highest 256 color cube
2474 * 252 - 255 – brightest colors in greyscale
2475 */
2476 font = &dc.bfont;
2477 }
2478
2479 if(base.mode & ATTR_ITALIC)
2480 font = &dc.ifont;
2481 if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD))
2482 font = &dc.ibfont;
2483
2484 if(IS_SET(MODE_REVERSE)) {
2485 if(fg == &dc.col[defaultfg]) {
2486 fg = &dc.col[defaultbg];
2487 } else {
2488 colfg.red = ~fg->color.red;
2489 colfg.green = ~fg->color.green;
2490 colfg.blue = ~fg->color.blue;
2491 colfg.alpha = fg->color.alpha;
2492 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
2493 fg = &revfg;
2494 }
2495
2496 if(bg == &dc.col[defaultbg]) {
2497 bg = &dc.col[defaultfg];
2498 } else {
2499 colbg.red = ~bg->color.red;
2500 colbg.green = ~bg->color.green;
2501 colbg.blue = ~bg->color.blue;
2502 colbg.alpha = bg->color.alpha;
2503 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &revbg);
2504 bg = &revbg;
2505 }
2506 }
2507
2508 if(base.mode & ATTR_REVERSE)
2509 temp = fg, fg = bg, bg = temp;
2510
2511 XftTextExtentsUtf8(xw.dpy, font->set, (FcChar8 *)s, bytelen,
2512 &extents);
2513 width = extents.xOff;
2514
2515 /* Intelligent cleaning up of the borders. */
2516 if(x == 0) {
2517 xclear(0, (y == 0)? 0 : winy, borderpx,
2518 winy + xw.ch + (y == term.row-1)? xw.h : 0);
2519 }
2520 if(x + charlen >= term.col-1) {
2521 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
2522 (y == term.row-1)? xw.h : (winy + xw.ch));
2523 }
2524 if(y == 0)
2525 xclear(winx, 0, winx + width, borderpx);
2526 if(y == term.row-1)
2527 xclear(winx, winy + xw.ch, winx + width, xw.h);
2528
2529 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
2530 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
2531 winy + font->ascent, (FcChar8 *)s, bytelen);
2532
2533 if(base.mode & ATTR_UNDERLINE) {
2534 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
2535 width, 1);
2536 }
2537 }
2538
2539 void
2540 xdrawcursor(void) {
2541 static int oldx = 0, oldy = 0;
2542 int sl;
2543 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs, 0};
2544
2545 LIMIT(oldx, 0, term.col-1);
2546 LIMIT(oldy, 0, term.row-1);
2547
2548 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
2549 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
2550
2551 /* remove the old cursor */
2552 if(term.line[oldy][oldx].state & GLYPH_SET) {
2553 sl = utf8size(term.line[oldy][oldx].c);
2554 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
2555 oldy, 1, sl);
2556 } else {
2557 xtermclear(oldx, oldy, oldx, oldy);
2558 }
2559
2560 /* draw the new one */
2561 if(!(IS_SET(MODE_HIDE))) {
2562 if(!(xw.state & WIN_FOCUSED))
2563 g.bg = defaultucs;
2564
2565 if(IS_SET(MODE_REVERSE))
2566 g.mode |= ATTR_REVERSE, g.fg = defaultcs, g.bg = defaultfg;
2567
2568 sl = utf8size(g.c);
2569 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
2570 oldx = term.c.x, oldy = term.c.y;
2571 }
2572 }
2573
2574 void
2575 xresettitle(void) {
2576 XStoreName(xw.dpy, xw.win, opt_title ? opt_title : "st");
2577 }
2578
2579 void
2580 redraw(void) {
2581 struct timespec tv = {0, REDRAW_TIMEOUT * 1000};
2582
2583 tfulldirt();
2584 draw();
2585 XSync(xw.dpy, False); /* necessary for a good tput flash */
2586 nanosleep(&tv, NULL);
2587 }
2588
2589 void
2590 draw(void) {
2591 XdbeSwapInfo swpinfo[1] = {{xw.win, XdbeCopied}};
2592
2593 drawregion(0, 0, term.col, term.row);
2594 XdbeSwapBuffers(xw.dpy, swpinfo, 1);
2595 }
2596
2597 void
2598 drawregion(int x1, int y1, int x2, int y2) {
2599 int ic, ib, x, y, ox, sl;
2600 Glyph base, new;
2601 char buf[DRAW_BUF_SIZ];
2602 bool ena_sel = sel.bx != -1, alt = IS_SET(MODE_ALTSCREEN) != 0;
2603
2604 if((sel.alt != 0) ^ alt)
2605 ena_sel = 0;
2606 if(!(xw.state & WIN_VISIBLE))
2607 return;
2608
2609 for(y = y1; y < y2; y++) {
2610 if(!term.dirty[y])
2611 continue;
2612
2613 xtermclear(0, y, term.col, y);
2614 term.dirty[y] = 0;
2615 base = term.line[y][0];
2616 ic = ib = ox = 0;
2617 for(x = x1; x < x2; x++) {
2618 new = term.line[y][x];
2619 if(ena_sel && *(new.c) && selected(x, y))
2620 new.mode ^= ATTR_REVERSE;
2621 if(ib > 0 && (!(new.state & GLYPH_SET)
2622 || ATTRCMP(base, new)
2623 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
2624 xdraws(buf, base, ox, y, ic, ib);
2625 ic = ib = 0;
2626 }
2627 if(new.state & GLYPH_SET) {
2628 if(ib == 0) {
2629 ox = x;
2630 base = new;
2631 }
2632 sl = utf8size(new.c);
2633 memcpy(buf+ib, new.c, sl);
2634 ib += sl;
2635 ++ic;
2636 }
2637 }
2638 if(ib > 0)
2639 xdraws(buf, base, ox, y, ic, ib);
2640 }
2641 xdrawcursor();
2642 }
2643
2644 void
2645 expose(XEvent *ev) {
2646 XExposeEvent *e = &ev->xexpose;
2647
2648 if(xw.state & WIN_REDRAW) {
2649 if(!e->count)
2650 xw.state &= ~WIN_REDRAW;
2651 }
2652 }
2653
2654 void
2655 visibility(XEvent *ev) {
2656 XVisibilityEvent *e = &ev->xvisibility;
2657
2658 if(e->state == VisibilityFullyObscured) {
2659 xw.state &= ~WIN_VISIBLE;
2660 } else if(!(xw.state & WIN_VISIBLE)) {
2661 /* need a full redraw for next Expose, not just a buf copy */
2662 xw.state |= WIN_VISIBLE | WIN_REDRAW;
2663 }
2664 }
2665
2666 void
2667 unmap(XEvent *ev) {
2668 xw.state &= ~WIN_VISIBLE;
2669 }
2670
2671 void
2672 xseturgency(int add) {
2673 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
2674
2675 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
2676 XSetWMHints(xw.dpy, xw.win, h);
2677 XFree(h);
2678 }
2679
2680 void
2681 focus(XEvent *ev) {
2682 if(ev->type == FocusIn) {
2683 XSetICFocus(xw.xic);
2684 xw.state |= WIN_FOCUSED;
2685 xseturgency(0);
2686 } else {
2687 XUnsetICFocus(xw.xic);
2688 xw.state &= ~WIN_FOCUSED;
2689 }
2690 }
2691
2692 inline bool
2693 match(uint mask, uint state) {
2694 if(mask == XK_NO_MOD && state)
2695 return false;
2696 if(mask != XK_ANY_MOD && mask != XK_NO_MOD && !state)
2697 return false;
2698 if((state & mask) != state)
2699 return false;
2700 return true;
2701 }
2702
2703 char*
2704 kmap(KeySym k, uint state) {
2705 uint mask;
2706 Key *kp;
2707 int i;
2708
2709 /* Check for mapped keys out of X11 function keys. */
2710 for(i = 0; i < LEN(mappedkeys); i++) {
2711 if(mappedkeys[i] == k)
2712 break;
2713 }
2714 if(i == LEN(mappedkeys)) {
2715 if((k & 0xFFFF) < 0xFF00)
2716 return NULL;
2717 }
2718
2719 for(kp = key; kp < key + LEN(key); kp++) {
2720 mask = kp->mask;
2721
2722 if(kp->k != k)
2723 continue;
2724
2725 if(!match(mask, state))
2726 continue;
2727
2728 if((kp->appkey < 0 && IS_SET(MODE_APPKEYPAD)) ||
2729 (kp->appkey > 0 && !IS_SET(MODE_APPKEYPAD))) {
2730 continue;
2731 }
2732
2733 if((kp->appcursor < 0 && IS_SET(MODE_APPCURSOR)) ||
2734 (kp->appcursor > 0 && !IS_SET(MODE_APPCURSOR))) {
2735 continue;
2736 }
2737
2738 if((kp->crlf < 0 && IS_SET(MODE_CRLF)) ||
2739 (kp->crlf > 0 && !IS_SET(MODE_CRLF))) {
2740 continue;
2741 }
2742
2743 return kp->s;
2744 }
2745
2746 return NULL;
2747 }
2748
2749 void
2750 kpress(XEvent *ev) {
2751 XKeyEvent *e = &ev->xkey;
2752 KeySym ksym;
2753 char xstr[31], buf[32], *customkey, *cp = buf;
2754 int len;
2755 Status status;
2756 Shortcut *bp;
2757
2758 if (IS_SET(MODE_KBDLOCK))
2759 return;
2760
2761 len = XmbLookupString(xw.xic, e, xstr, sizeof(xstr), &ksym, &status);
2762 e->state &= ~Mod2Mask;
2763 /* 1. shortcuts */
2764 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
2765 if(ksym == bp->keysym && match(bp->mod, e->state)) {
2766 bp->func(&(bp->arg));
2767 return;
2768 }
2769 }
2770
2771 /* 2. custom keys from config.h */
2772 if((customkey = kmap(ksym, e->state))) {
2773 len = strlen(customkey);
2774 memcpy(buf, customkey, len);
2775 /* 2. hardcoded (overrides X lookup) */
2776 } else {
2777 if(len == 0)
2778 return;
2779
2780 if (len == 1 && e->state & Mod1Mask)
2781 *cp++ = '\033';
2782
2783 memcpy(cp, xstr, len);
2784 len = cp - buf + len;
2785 }
2786
2787 ttywrite(buf, len);
2788 if(IS_SET(MODE_ECHO))
2789 techo(buf, len);
2790 }
2791
2792
2793 void
2794 cmessage(XEvent *e) {
2795 /* See xembed specs
2796 http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html */
2797 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
2798 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
2799 xw.state |= WIN_FOCUSED;
2800 xseturgency(0);
2801 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
2802 xw.state &= ~WIN_FOCUSED;
2803 }
2804 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
2805 /* Send SIGHUP to shell */
2806 kill(pid, SIGHUP);
2807 exit(EXIT_SUCCESS);
2808 }
2809 }
2810
2811 void
2812 cresize(int width, int height)
2813 {
2814 int col, row;
2815
2816 if(width != 0)
2817 xw.w = width;
2818 if(height != 0)
2819 xw.h = height;
2820
2821 col = (xw.w - 2*borderpx) / xw.cw;
2822 row = (xw.h - 2*borderpx) / xw.ch;
2823
2824 tresize(col, row);
2825 xresize(col, row);
2826 ttyresize();
2827 }
2828
2829 void
2830 resize(XEvent *e) {
2831 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
2832 return;
2833
2834 cresize(e->xconfigure.width, e->xconfigure.height);
2835 }
2836
2837 void
2838 run(void) {
2839 XEvent ev;
2840 fd_set rfd;
2841 int xfd = XConnectionNumber(xw.dpy), i;
2842 struct timeval drawtimeout, *tv = NULL;
2843
2844 for(i = 0;; i++) {
2845 FD_ZERO(&rfd);
2846 FD_SET(cmdfd, &rfd);
2847 FD_SET(xfd, &rfd);
2848 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
2849 if(errno == EINTR)
2850 continue;
2851 die("select failed: %s\n", SERRNO);
2852 }
2853
2854 /*
2855 * Stop after a certain number of reads so the user does not
2856 * feel like the system is stuttering.
2857 */
2858 if(i < 1000 && FD_ISSET(cmdfd, &rfd)) {
2859 ttyread();
2860
2861 /*
2862 * Just wait a bit so it isn't disturbing the
2863 * user and the system is able to write something.
2864 */
2865 drawtimeout.tv_sec = 0;
2866 drawtimeout.tv_usec = 5;
2867 tv = &drawtimeout;
2868 continue;
2869 }
2870 i = 0;
2871 tv = NULL;
2872
2873 while(XPending(xw.dpy)) {
2874 XNextEvent(xw.dpy, &ev);
2875 if(XFilterEvent(&ev, None))
2876 continue;
2877 if(handler[ev.type])
2878 (handler[ev.type])(&ev);
2879 }
2880
2881 draw();
2882 XFlush(xw.dpy);
2883 }
2884 }
2885
2886 int
2887 main(int argc, char *argv[]) {
2888 int i, bitm, xr, yr;
2889 uint wr, hr;
2890
2891 xw.fw = xw.fh = xw.fx = xw.fy = 0;
2892 xw.isfixed = False;
2893
2894 for(i = 1; i < argc; i++) {
2895 switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
2896 case 'c':
2897 if(++i < argc)
2898 opt_class = argv[i];
2899 break;
2900 case 'e':
2901 /* eat all remaining arguments */
2902 if(++i < argc)
2903 opt_cmd = &argv[i];
2904 goto run;
2905 case 'f':
2906 if(++i < argc)
2907 opt_font = argv[i];
2908 break;
2909 case 'g':
2910 if(++i >= argc)
2911 break;
2912
2913 bitm = XParseGeometry(argv[i], &xr, &yr, &wr, &hr);
2914 if(bitm & XValue)
2915 xw.fx = xr;
2916 if(bitm & YValue)
2917 xw.fy = yr;
2918 if(bitm & WidthValue)
2919 xw.fw = (int)wr;
2920 if(bitm & HeightValue)
2921 xw.fh = (int)hr;
2922 if(bitm & XNegative && xw.fx == 0)
2923 xw.fx = -1;
2924 if(bitm & XNegative && xw.fy == 0)
2925 xw.fy = -1;
2926
2927 if(xw.fh != 0 && xw.fw != 0)
2928 xw.isfixed = True;
2929 break;
2930 case 'o':
2931 if(++i < argc)
2932 opt_io = argv[i];
2933 break;
2934 case 't':
2935 if(++i < argc)
2936 opt_title = argv[i];
2937 break;
2938 case 'v':
2939 default:
2940 die(USAGE);
2941 case 'w':
2942 if(++i < argc)
2943 opt_embed = argv[i];
2944 break;
2945 }
2946 }
2947
2948 run:
2949 setlocale(LC_CTYPE, "");
2950 XSetLocaleModifiers("");
2951 tnew(80, 24);
2952 xinit();
2953 ttynew();
2954 selinit();
2955 run();
2956
2957 return 0;
2958 }
2959