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[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)) != 0)
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 numlock; /* lock numbers in keyboard */
198 bool *tabs;
199 } Term;
200
201 /* Purely graphic info */
202 typedef struct {
203 Display *dpy;
204 Colourmap cmap;
205 Window win;
206 XdbeBackBuffer buf;
207 Atom xembed, wmdeletewin;
208 XIM xim;
209 XIC xic;
210 Draw draw;
211 Visual *vis;
212 int scr;
213 bool isfixed; /* is fixed geometry? */
214 int fx, fy, fw, fh; /* fixed geometry */
215 int tw, th; /* tty width and height */
216 int w; /* window width */
217 int h; /* window height */
218 int ch; /* char height */
219 int cw; /* char width */
220 char state; /* focus, redraw, visible */
221 } XWindow;
222
223 typedef struct {
224 KeySym k;
225 uint mask;
226 char s[ESC_BUF_SIZ];
227 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
228 signed char appkey; /* application keypad */
229 signed char appcursor; /* application cursor */
230 signed char crlf; /* crlf mode */
231 } Key;
232
233 /* TODO: use better name for vars... */
234 typedef struct {
235 int mode;
236 int bx, by;
237 int ex, ey;
238 struct {
239 int x, y;
240 } b, e;
241 char *clip;
242 Atom xtarget;
243 bool alt;
244 struct timeval tclick1;
245 struct timeval tclick2;
246 } Selection;
247
248 typedef union {
249 int i;
250 unsigned int ui;
251 float f;
252 const void *v;
253 } Arg;
254
255 typedef struct {
256 unsigned int mod;
257 KeySym keysym;
258 void (*func)(const Arg *);
259 const Arg arg;
260 } Shortcut;
261
262 /* function definitions used in config.h */
263 static void xzoom(const Arg *);
264 static void selpaste(const Arg *);
265 static void numlock(const Arg *);
266
267 /* Config.h for applying patches and the configuration. */
268 #include "config.h"
269
270 /* Font structure */
271 typedef struct {
272 int height;
273 int width;
274 int ascent;
275 int descent;
276 short lbearing;
277 short rbearing;
278 XftFont *set;
279 } Font;
280
281 /* Drawing Context */
282 typedef struct {
283 Colour col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
284 Font font, bfont, ifont, ibfont;
285 } DC;
286
287 static void die(const char *, ...);
288 static void draw(void);
289 static void redraw(void);
290 static void drawregion(int, int, int, int);
291 static void execsh(void);
292 static void sigchld(int);
293 static void run(void);
294
295 static void csidump(void);
296 static void csihandle(void);
297 static void csiparse(void);
298 static void csireset(void);
299 static void strdump(void);
300 static void strhandle(void);
301 static void strparse(void);
302 static void strreset(void);
303
304 static void tclearregion(int, int, int, int);
305 static void tcursor(int);
306 static void tdeletechar(int);
307 static void tdeleteline(int);
308 static void tinsertblank(int);
309 static void tinsertblankline(int);
310 static void tmoveto(int, int);
311 static void tmoveato(int x, int y);
312 static void tnew(int, int);
313 static void tnewline(int);
314 static void tputtab(bool);
315 static void tputc(char *, int);
316 static void treset(void);
317 static int tresize(int, int);
318 static void tscrollup(int, int);
319 static void tscrolldown(int, int);
320 static void tsetattr(int*, int);
321 static void tsetchar(char *, Glyph *, int, int);
322 static void tsetscroll(int, int);
323 static void tswapscreen(void);
324 static void tsetdirt(int, int);
325 static void tsetmode(bool, bool, int *, int);
326 static void tfulldirt(void);
327 static void techo(char *, int);
328
329 static inline bool match(uint, uint);
330 static void ttynew(void);
331 static void ttyread(void);
332 static void ttyresize(void);
333 static void ttywrite(const char *, size_t);
334
335 static void xdraws(char *, Glyph, int, int, int, int);
336 static void xhints(void);
337 static void xclear(int, int, int, int);
338 static void xdrawcursor(void);
339 static void xinit(void);
340 static void xloadcols(void);
341 static void xresettitle(void);
342 static void xseturgency(int);
343 static void xsetsel(char*);
344 static void xtermclear(int, int, int, int);
345 static void xresize(int, int);
346
347 static void expose(XEvent *);
348 static void visibility(XEvent *);
349 static void unmap(XEvent *);
350 static char *kmap(KeySym, uint);
351 static void kpress(XEvent *);
352 static void cmessage(XEvent *);
353 static void cresize(int width, int height);
354 static void resize(XEvent *);
355 static void focus(XEvent *);
356 static void brelease(XEvent *);
357 static void bpress(XEvent *);
358 static void bmotion(XEvent *);
359 static void selnotify(XEvent *);
360 static void selclear(XEvent *);
361 static void selrequest(XEvent *);
362
363 static void selinit(void);
364 static inline bool selected(int, int);
365 static void selcopy(void);
366 static void selscroll(int, int);
367
368 static int utf8decode(char *, long *);
369 static int utf8encode(long *, char *);
370 static int utf8size(char *);
371 static int isfullutf8(char *, int);
372
373 static ssize_t xwrite(int, char *, size_t);
374 static void *xmalloc(size_t);
375 static void *xrealloc(void *, size_t);
376 static void *xcalloc(size_t nmemb, size_t size);
377
378 static void (*handler[LASTEvent])(XEvent *) = {
379 [KeyPress] = kpress,
380 [ClientMessage] = cmessage,
381 [ConfigureNotify] = resize,
382 [VisibilityNotify] = visibility,
383 [UnmapNotify] = unmap,
384 [Expose] = expose,
385 [FocusIn] = focus,
386 [FocusOut] = focus,
387 [MotionNotify] = bmotion,
388 [ButtonPress] = bpress,
389 [ButtonRelease] = brelease,
390 [SelectionClear] = selclear,
391 [SelectionNotify] = selnotify,
392 [SelectionRequest] = selrequest,
393 };
394
395 /* Globals */
396 static DC dc;
397 static XWindow xw;
398 static Term term;
399 static CSIEscape csiescseq;
400 static STREscape strescseq;
401 static int cmdfd;
402 static pid_t pid;
403 static Selection sel;
404 static int iofd = -1;
405 static char **opt_cmd = NULL;
406 static char *opt_io = NULL;
407 static char *opt_title = NULL;
408 static char *opt_embed = NULL;
409 static char *opt_class = NULL;
410 static char *opt_font = NULL;
411
412 static char *usedfont = NULL;
413 static int usedfontsize = 0;
414
415 ssize_t
416 xwrite(int fd, char *s, size_t len) {
417 size_t aux = len;
418
419 while(len > 0) {
420 ssize_t r = write(fd, s, len);
421 if(r < 0)
422 return r;
423 len -= r;
424 s += r;
425 }
426 return aux;
427 }
428
429 void *
430 xmalloc(size_t len) {
431 void *p = malloc(len);
432
433 if(!p)
434 die("Out of memory\n");
435
436 return p;
437 }
438
439 void *
440 xrealloc(void *p, size_t len) {
441 if((p = realloc(p, len)) == NULL)
442 die("Out of memory\n");
443
444 return p;
445 }
446
447 void *
448 xcalloc(size_t nmemb, size_t size) {
449 void *p = calloc(nmemb, size);
450
451 if(!p)
452 die("Out of memory\n");
453
454 return p;
455 }
456
457 int
458 utf8decode(char *s, long *u) {
459 uchar c;
460 int i, n, rtn;
461
462 rtn = 1;
463 c = *s;
464 if(~c & B7) { /* 0xxxxxxx */
465 *u = c;
466 return rtn;
467 } else if((c & (B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */
468 *u = c&(B4|B3|B2|B1|B0);
469 n = 1;
470 } else if((c & (B7|B6|B5|B4)) == (B7|B6|B5)) { /* 1110xxxx */
471 *u = c&(B3|B2|B1|B0);
472 n = 2;
473 } else if((c & (B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) { /* 11110xxx */
474 *u = c & (B2|B1|B0);
475 n = 3;
476 } else {
477 goto invalid;
478 }
479
480 for(i = n, ++s; i > 0; --i, ++rtn, ++s) {
481 c = *s;
482 if((c & (B7|B6)) != B7) /* 10xxxxxx */
483 goto invalid;
484 *u <<= 6;
485 *u |= c & (B5|B4|B3|B2|B1|B0);
486 }
487
488 if((n == 1 && *u < 0x80) ||
489 (n == 2 && *u < 0x800) ||
490 (n == 3 && *u < 0x10000) ||
491 (*u >= 0xD800 && *u <= 0xDFFF)) {
492 goto invalid;
493 }
494
495 return rtn;
496 invalid:
497 *u = 0xFFFD;
498
499 return rtn;
500 }
501
502 int
503 utf8encode(long *u, char *s) {
504 uchar *sp;
505 ulong uc;
506 int i, n;
507
508 sp = (uchar *)s;
509 uc = *u;
510 if(uc < 0x80) {
511 *sp = uc; /* 0xxxxxxx */
512 return 1;
513 } else if(*u < 0x800) {
514 *sp = (uc >> 6) | (B7|B6); /* 110xxxxx */
515 n = 1;
516 } else if(uc < 0x10000) {
517 *sp = (uc >> 12) | (B7|B6|B5); /* 1110xxxx */
518 n = 2;
519 } else if(uc <= 0x10FFFF) {
520 *sp = (uc >> 18) | (B7|B6|B5|B4); /* 11110xxx */
521 n = 3;
522 } else {
523 goto invalid;
524 }
525
526 for(i=n,++sp; i>0; --i,++sp)
527 *sp = ((uc >> 6*(i-1)) & (B5|B4|B3|B2|B1|B0)) | B7; /* 10xxxxxx */
528
529 return n+1;
530 invalid:
531 /* U+FFFD */
532 *s++ = '\xEF';
533 *s++ = '\xBF';
534 *s = '\xBD';
535
536 return 3;
537 }
538
539 /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
540 UTF-8 otherwise return 0 */
541 int
542 isfullutf8(char *s, int b) {
543 uchar *c1, *c2, *c3;
544
545 c1 = (uchar *)s;
546 c2 = (uchar *)++s;
547 c3 = (uchar *)++s;
548 if(b < 1) {
549 return 0;
550 } else if((*c1&(B7|B6|B5)) == (B7|B6) && b == 1) {
551 return 0;
552 } else if((*c1&(B7|B6|B5|B4)) == (B7|B6|B5) &&
553 ((b == 1) ||
554 ((b == 2) && (*c2&(B7|B6)) == B7))) {
555 return 0;
556 } else if((*c1&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4) &&
557 ((b == 1) ||
558 ((b == 2) && (*c2&(B7|B6)) == B7) ||
559 ((b == 3) && (*c2&(B7|B6)) == B7 && (*c3&(B7|B6)) == B7))) {
560 return 0;
561 } else {
562 return 1;
563 }
564 }
565
566 int
567 utf8size(char *s) {
568 uchar c = *s;
569
570 if(~c&B7) {
571 return 1;
572 } else if((c&(B7|B6|B5)) == (B7|B6)) {
573 return 2;
574 } else if((c&(B7|B6|B5|B4)) == (B7|B6|B5)) {
575 return 3;
576 } else {
577 return 4;
578 }
579 }
580
581 void
582 selinit(void) {
583 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
584 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
585 sel.mode = 0;
586 sel.bx = -1;
587 sel.clip = NULL;
588 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
589 if(sel.xtarget == None)
590 sel.xtarget = XA_STRING;
591 }
592
593 static int
594 x2col(int x) {
595 x -= borderpx;
596 x /= xw.cw;
597
598 return LIMIT(x, 0, term.col-1);
599 }
600
601 static int
602 y2row(int y) {
603 y -= borderpx;
604 y /= xw.ch;
605
606 return LIMIT(y, 0, term.row-1);
607 }
608
609 static inline bool
610 selected(int x, int y) {
611 int bx, ex;
612
613 if(sel.ey == y && sel.by == y) {
614 bx = MIN(sel.bx, sel.ex);
615 ex = MAX(sel.bx, sel.ex);
616 return BETWEEN(x, bx, ex);
617 }
618
619 return ((sel.b.y < y && y < sel.e.y)
620 || (y == sel.e.y && x <= sel.e.x))
621 || (y == sel.b.y && x >= sel.b.x
622 && (x <= sel.e.x || sel.b.y != sel.e.y));
623 }
624
625 void
626 getbuttoninfo(XEvent *e) {
627 sel.alt = IS_SET(MODE_ALTSCREEN);
628
629 sel.ex = x2col(e->xbutton.x);
630 sel.ey = y2row(e->xbutton.y);
631
632 sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
633 sel.b.y = MIN(sel.by, sel.ey);
634 sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
635 sel.e.y = MAX(sel.by, sel.ey);
636 }
637
638 void
639 mousereport(XEvent *e) {
640 int x = x2col(e->xbutton.x);
641 int y = y2row(e->xbutton.y);
642 int button = e->xbutton.button;
643 int state = e->xbutton.state;
644 char buf[] = { '\033', '[', 'M', 0, 32+x+1, 32+y+1 };
645 static int ob, ox, oy;
646
647 /* from urxvt */
648 if(e->xbutton.type == MotionNotify) {
649 if(!IS_SET(MODE_MOUSEMOTION) || (x == ox && y == oy))
650 return;
651 button = ob + 32;
652 ox = x, oy = y;
653 } else if(e->xbutton.type == ButtonRelease || button == AnyButton) {
654 button = 3;
655 } else {
656 button -= Button1;
657 if(button >= 3)
658 button += 64 - 3;
659 if(e->xbutton.type == ButtonPress) {
660 ob = button;
661 ox = x, oy = y;
662 }
663 }
664
665 buf[3] = 32 + button + (state & ShiftMask ? 4 : 0)
666 + (state & Mod4Mask ? 8 : 0)
667 + (state & ControlMask ? 16 : 0);
668
669 ttywrite(buf, sizeof(buf));
670 }
671
672 void
673 bpress(XEvent *e) {
674 if(IS_SET(MODE_MOUSE)) {
675 mousereport(e);
676 } else if(e->xbutton.button == Button1) {
677 if(sel.bx != -1) {
678 sel.bx = -1;
679 tsetdirt(sel.b.y, sel.e.y);
680 draw();
681 }
682 sel.mode = 1;
683 sel.ex = sel.bx = x2col(e->xbutton.x);
684 sel.ey = sel.by = y2row(e->xbutton.y);
685 } else if(e->xbutton.button == Button4) {
686 ttywrite("\031", 1);
687 } else if(e->xbutton.button == Button5) {
688 ttywrite("\005", 1);
689 }
690 }
691
692 void
693 selcopy(void) {
694 char *str, *ptr, *p;
695 int x, y, bufsize, is_selected = 0, size;
696 Glyph *gp, *last;
697
698 if(sel.bx == -1) {
699 str = NULL;
700 } else {
701 bufsize = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
702 ptr = str = xmalloc(bufsize);
703
704 /* append every set & selected glyph to the selection */
705 for(y = 0; y < term.row; y++) {
706 gp = &term.line[y][0];
707 last = gp + term.col;
708
709 while(--last >= gp && !(last->state & GLYPH_SET))
710 /* nothing */;
711
712 for(x = 0; gp <= last; x++, ++gp) {
713 if(!(is_selected = selected(x, y)))
714 continue;
715
716 p = (gp->state & GLYPH_SET) ? gp->c : " ";
717 size = utf8size(p);
718 memcpy(ptr, p, size);
719 ptr += size;
720 }
721 /* \n at the end of every selected line except for the last one */
722 if(is_selected && y < sel.e.y)
723 *ptr++ = '\n';
724 }
725 *ptr = 0;
726 }
727 xsetsel(str);
728 }
729
730 void
731 selnotify(XEvent *e) {
732 ulong nitems, ofs, rem;
733 int format;
734 uchar *data;
735 Atom type;
736
737 ofs = 0;
738 do {
739 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
740 False, AnyPropertyType, &type, &format,
741 &nitems, &rem, &data)) {
742 fprintf(stderr, "Clipboard allocation failed\n");
743 return;
744 }
745 ttywrite((const char *) data, nitems * format / 8);
746 XFree(data);
747 /* number of 32-bit chunks returned */
748 ofs += nitems * format / 32;
749 } while(rem > 0);
750 }
751
752 void
753 selpaste(const Arg *dummy) {
754 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
755 xw.win, CurrentTime);
756 }
757
758 void selclear(XEvent *e) {
759 if(sel.bx == -1)
760 return;
761 sel.bx = -1;
762 tsetdirt(sel.b.y, sel.e.y);
763 }
764
765 void
766 selrequest(XEvent *e) {
767 XSelectionRequestEvent *xsre;
768 XSelectionEvent xev;
769 Atom xa_targets, string;
770
771 xsre = (XSelectionRequestEvent *) e;
772 xev.type = SelectionNotify;
773 xev.requestor = xsre->requestor;
774 xev.selection = xsre->selection;
775 xev.target = xsre->target;
776 xev.time = xsre->time;
777 /* reject */
778 xev.property = None;
779
780 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
781 if(xsre->target == xa_targets) {
782 /* respond with the supported type */
783 string = sel.xtarget;
784 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
785 XA_ATOM, 32, PropModeReplace,
786 (uchar *) &string, 1);
787 xev.property = xsre->property;
788 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
789 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
790 xsre->target, 8, PropModeReplace,
791 (uchar *) sel.clip, strlen(sel.clip));
792 xev.property = xsre->property;
793 }
794
795 /* all done, send a notification to the listener */
796 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
797 fprintf(stderr, "Error sending SelectionNotify event\n");
798 }
799
800 void
801 xsetsel(char *str) {
802 /* register the selection for both the clipboard and the primary */
803 Atom clipboard;
804
805 free(sel.clip);
806 sel.clip = str;
807
808 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
809
810 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
811 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
812 }
813
814 void
815 brelease(XEvent *e) {
816 struct timeval now;
817
818 if(IS_SET(MODE_MOUSE)) {
819 mousereport(e);
820 return;
821 }
822
823 if(e->xbutton.button == Button2) {
824 selpaste(NULL);
825 } else if(e->xbutton.button == Button1) {
826 sel.mode = 0;
827 getbuttoninfo(e);
828 term.dirty[sel.ey] = 1;
829 if(sel.bx == sel.ex && sel.by == sel.ey) {
830 sel.bx = -1;
831 gettimeofday(&now, NULL);
832
833 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
834 /* triple click on the line */
835 sel.b.x = sel.bx = 0;
836 sel.e.x = sel.ex = term.col;
837 sel.b.y = sel.e.y = sel.ey;
838 selcopy();
839 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
840 /* double click to select word */
841 sel.bx = sel.ex;
842 while(sel.bx > 0 && term.line[sel.ey][sel.bx-1].state & GLYPH_SET &&
843 term.line[sel.ey][sel.bx-1].c[0] != ' ') {
844 sel.bx--;
845 }
846 sel.b.x = sel.bx;
847 while(sel.ex < term.col-1 && term.line[sel.ey][sel.ex+1].state & GLYPH_SET &&
848 term.line[sel.ey][sel.ex+1].c[0] != ' ') {
849 sel.ex++;
850 }
851 sel.e.x = sel.ex;
852 sel.b.y = sel.e.y = sel.ey;
853 selcopy();
854 }
855 } else {
856 selcopy();
857 }
858 }
859
860 memcpy(&sel.tclick2, &sel.tclick1, sizeof(struct timeval));
861 gettimeofday(&sel.tclick1, NULL);
862 }
863
864 void
865 bmotion(XEvent *e) {
866 int starty, endy, oldey, oldex;
867
868 if(IS_SET(MODE_MOUSE)) {
869 mousereport(e);
870 return;
871 }
872
873 if(!sel.mode)
874 return;
875
876 oldey = sel.ey;
877 oldex = sel.ex;
878 getbuttoninfo(e);
879
880 if(oldey != sel.ey || oldex != sel.ex) {
881 starty = MIN(oldey, sel.ey);
882 endy = MAX(oldey, sel.ey);
883 tsetdirt(starty, endy);
884 }
885 }
886
887 void
888 die(const char *errstr, ...) {
889 va_list ap;
890
891 va_start(ap, errstr);
892 vfprintf(stderr, errstr, ap);
893 va_end(ap);
894 exit(EXIT_FAILURE);
895 }
896
897 void
898 execsh(void) {
899 char **args;
900 char *envshell = getenv("SHELL");
901 const struct passwd *pass = getpwuid(getuid());
902 char buf[sizeof(long) * 8 + 1];
903
904 unsetenv("COLUMNS");
905 unsetenv("LINES");
906 unsetenv("TERMCAP");
907
908 if(pass) {
909 setenv("LOGNAME", pass->pw_name, 1);
910 setenv("USER", pass->pw_name, 1);
911 setenv("SHELL", pass->pw_shell, 0);
912 setenv("HOME", pass->pw_dir, 0);
913 }
914
915 snprintf(buf, sizeof(buf), "%lu", xw.win);
916 setenv("WINDOWID", buf, 1);
917
918 signal(SIGCHLD, SIG_DFL);
919 signal(SIGHUP, SIG_DFL);
920 signal(SIGINT, SIG_DFL);
921 signal(SIGQUIT, SIG_DFL);
922 signal(SIGTERM, SIG_DFL);
923 signal(SIGALRM, SIG_DFL);
924
925 DEFAULT(envshell, shell);
926 setenv("TERM", termname, 1);
927 args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
928 execvp(args[0], args);
929 exit(EXIT_FAILURE);
930 }
931
932 void
933 sigchld(int a) {
934 int stat = 0;
935
936 if(waitpid(pid, &stat, 0) < 0)
937 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
938
939 if(WIFEXITED(stat)) {
940 exit(WEXITSTATUS(stat));
941 } else {
942 exit(EXIT_FAILURE);
943 }
944 }
945
946 void
947 ttynew(void) {
948 int m, s;
949 struct winsize w = {term.row, term.col, 0, 0};
950
951 /* seems to work fine on linux, openbsd and freebsd */
952 if(openpty(&m, &s, NULL, NULL, &w) < 0)
953 die("openpty failed: %s\n", SERRNO);
954
955 switch(pid = fork()) {
956 case -1:
957 die("fork failed\n");
958 break;
959 case 0:
960 setsid(); /* create a new process group */
961 dup2(s, STDIN_FILENO);
962 dup2(s, STDOUT_FILENO);
963 dup2(s, STDERR_FILENO);
964 if(ioctl(s, TIOCSCTTY, NULL) < 0)
965 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
966 close(s);
967 close(m);
968 execsh();
969 break;
970 default:
971 close(s);
972 cmdfd = m;
973 signal(SIGCHLD, sigchld);
974 if(opt_io) {
975 iofd = (!strcmp(opt_io, "-")) ?
976 STDOUT_FILENO :
977 open(opt_io, O_WRONLY | O_CREAT, 0666);
978 if(iofd < 0) {
979 fprintf(stderr, "Error opening %s:%s\n",
980 opt_io, strerror(errno));
981 }
982 }
983 }
984 }
985
986 void
987 dump(char c) {
988 static int col;
989
990 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
991 if(++col % 10 == 0)
992 fprintf(stderr, "\n");
993 }
994
995 void
996 ttyread(void) {
997 static char buf[BUFSIZ];
998 static int buflen = 0;
999 char *ptr;
1000 char s[UTF_SIZ];
1001 int charsize; /* size of utf8 char in bytes */
1002 long utf8c;
1003 int ret;
1004
1005 /* append read bytes to unprocessed bytes */
1006 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1007 die("Couldn't read from shell: %s\n", SERRNO);
1008
1009 /* process every complete utf8 char */
1010 buflen += ret;
1011 ptr = buf;
1012 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
1013 charsize = utf8decode(ptr, &utf8c);
1014 utf8encode(&utf8c, s);
1015 tputc(s, charsize);
1016 ptr += charsize;
1017 buflen -= charsize;
1018 }
1019
1020 /* keep any uncomplete utf8 char for the next call */
1021 memmove(buf, ptr, buflen);
1022 }
1023
1024 void
1025 ttywrite(const char *s, size_t n) {
1026 if(write(cmdfd, s, n) == -1)
1027 die("write error on tty: %s\n", SERRNO);
1028 }
1029
1030 void
1031 ttyresize(void) {
1032 struct winsize w;
1033
1034 w.ws_row = term.row;
1035 w.ws_col = term.col;
1036 w.ws_xpixel = xw.tw;
1037 w.ws_ypixel = xw.th;
1038 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1039 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
1040 }
1041
1042 void
1043 tsetdirt(int top, int bot) {
1044 int i;
1045
1046 LIMIT(top, 0, term.row-1);
1047 LIMIT(bot, 0, term.row-1);
1048
1049 for(i = top; i <= bot; i++)
1050 term.dirty[i] = 1;
1051 }
1052
1053 void
1054 tfulldirt(void) {
1055 tsetdirt(0, term.row-1);
1056 }
1057
1058 void
1059 tcursor(int mode) {
1060 static TCursor c;
1061
1062 if(mode == CURSOR_SAVE) {
1063 c = term.c;
1064 } else if(mode == CURSOR_LOAD) {
1065 term.c = c;
1066 tmoveto(c.x, c.y);
1067 }
1068 }
1069
1070 void
1071 treset(void) {
1072 uint i;
1073
1074 term.c = (TCursor){{
1075 .mode = ATTR_NULL,
1076 .fg = defaultfg,
1077 .bg = defaultbg
1078 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1079
1080 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1081 for(i = tabspaces; i < term.col; i += tabspaces)
1082 term.tabs[i] = 1;
1083 term.top = 0;
1084 term.bot = term.row - 1;
1085 term.mode = MODE_WRAP;
1086
1087 tclearregion(0, 0, term.col-1, term.row-1);
1088 tmoveto(0, 0);
1089 tcursor(CURSOR_SAVE);
1090 }
1091
1092 void
1093 tnew(int col, int row) {
1094 /* set screen size */
1095 term.row = row;
1096 term.col = col;
1097 term.line = xmalloc(term.row * sizeof(Line));
1098 term.alt = xmalloc(term.row * sizeof(Line));
1099 term.dirty = xmalloc(term.row * sizeof(*term.dirty));
1100 term.tabs = xmalloc(term.col * sizeof(*term.tabs));
1101
1102 for(row = 0; row < term.row; row++) {
1103 term.line[row] = xmalloc(term.col * sizeof(Glyph));
1104 term.alt [row] = xmalloc(term.col * sizeof(Glyph));
1105 term.dirty[row] = 0;
1106 }
1107
1108 term.numlock = 1;
1109 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1110 /* setup screen */
1111 treset();
1112 }
1113
1114 void
1115 tswapscreen(void) {
1116 Line *tmp = term.line;
1117
1118 term.line = term.alt;
1119 term.alt = tmp;
1120 term.mode ^= MODE_ALTSCREEN;
1121 tfulldirt();
1122 }
1123
1124 void
1125 tscrolldown(int orig, int n) {
1126 int i;
1127 Line temp;
1128
1129 LIMIT(n, 0, term.bot-orig+1);
1130
1131 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1132
1133 for(i = term.bot; i >= orig+n; i--) {
1134 temp = term.line[i];
1135 term.line[i] = term.line[i-n];
1136 term.line[i-n] = temp;
1137
1138 term.dirty[i] = 1;
1139 term.dirty[i-n] = 1;
1140 }
1141
1142 selscroll(orig, n);
1143 }
1144
1145 void
1146 tscrollup(int orig, int n) {
1147 int i;
1148 Line temp;
1149 LIMIT(n, 0, term.bot-orig+1);
1150
1151 tclearregion(0, orig, term.col-1, orig+n-1);
1152
1153 for(i = orig; i <= term.bot-n; i++) {
1154 temp = term.line[i];
1155 term.line[i] = term.line[i+n];
1156 term.line[i+n] = temp;
1157
1158 term.dirty[i] = 1;
1159 term.dirty[i+n] = 1;
1160 }
1161
1162 selscroll(orig, -n);
1163 }
1164
1165 void
1166 selscroll(int orig, int n) {
1167 if(sel.bx == -1)
1168 return;
1169
1170 if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
1171 if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
1172 sel.bx = -1;
1173 return;
1174 }
1175 if(sel.by < term.top) {
1176 sel.by = term.top;
1177 sel.bx = 0;
1178 }
1179 if(sel.ey > term.bot) {
1180 sel.ey = term.bot;
1181 sel.ex = term.col;
1182 }
1183 sel.b.y = sel.by, sel.b.x = sel.bx;
1184 sel.e.y = sel.ey, sel.e.x = sel.ex;
1185 }
1186 }
1187
1188 void
1189 tnewline(int first_col) {
1190 int y = term.c.y;
1191
1192 if(y == term.bot) {
1193 tscrollup(term.top, 1);
1194 } else {
1195 y++;
1196 }
1197 tmoveto(first_col ? 0 : term.c.x, y);
1198 }
1199
1200 void
1201 csiparse(void) {
1202 /* int noarg = 1; */
1203 char *p = csiescseq.buf;
1204
1205 csiescseq.narg = 0;
1206 if(*p == '?')
1207 csiescseq.priv = 1, p++;
1208
1209 while(p < csiescseq.buf+csiescseq.len) {
1210 while(isdigit(*p)) {
1211 csiescseq.arg[csiescseq.narg] *= 10;
1212 csiescseq.arg[csiescseq.narg] += *p++ - '0'/*, noarg = 0 */;
1213 }
1214 if(*p == ';' && csiescseq.narg+1 < ESC_ARG_SIZ) {
1215 csiescseq.narg++, p++;
1216 } else {
1217 csiescseq.mode = *p;
1218 csiescseq.narg++;
1219
1220 return;
1221 }
1222 }
1223 }
1224
1225 /* for absolute user moves, when decom is set */
1226 void
1227 tmoveato(int x, int y) {
1228 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1229 }
1230
1231 void
1232 tmoveto(int x, int y) {
1233 int miny, maxy;
1234
1235 if(term.c.state & CURSOR_ORIGIN) {
1236 miny = term.top;
1237 maxy = term.bot;
1238 } else {
1239 miny = 0;
1240 maxy = term.row - 1;
1241 }
1242 LIMIT(x, 0, term.col-1);
1243 LIMIT(y, miny, maxy);
1244 term.c.state &= ~CURSOR_WRAPNEXT;
1245 term.c.x = x;
1246 term.c.y = y;
1247 }
1248
1249 void
1250 tsetchar(char *c, Glyph *attr, int x, int y) {
1251 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1252 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1253 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1254 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1255 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1256 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1257 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1258 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1259 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1260 };
1261
1262 /*
1263 * The table is proudly stolen from rxvt.
1264 */
1265 if(attr->mode & ATTR_GFX) {
1266 if(c[0] >= 0x41 && c[0] <= 0x7e
1267 && vt100_0[c[0] - 0x41]) {
1268 c = vt100_0[c[0] - 0x41];
1269 }
1270 }
1271
1272 term.dirty[y] = 1;
1273 term.line[y][x] = *attr;
1274 memcpy(term.line[y][x].c, c, UTF_SIZ);
1275 term.line[y][x].state |= GLYPH_SET;
1276 }
1277
1278 void
1279 tclearregion(int x1, int y1, int x2, int y2) {
1280 int x, y, temp;
1281
1282 if(x1 > x2)
1283 temp = x1, x1 = x2, x2 = temp;
1284 if(y1 > y2)
1285 temp = y1, y1 = y2, y2 = temp;
1286
1287 LIMIT(x1, 0, term.col-1);
1288 LIMIT(x2, 0, term.col-1);
1289 LIMIT(y1, 0, term.row-1);
1290 LIMIT(y2, 0, term.row-1);
1291
1292 for(y = y1; y <= y2; y++) {
1293 term.dirty[y] = 1;
1294 for(x = x1; x <= x2; x++)
1295 term.line[y][x].state = 0;
1296 }
1297 }
1298
1299 void
1300 tdeletechar(int n) {
1301 int src = term.c.x + n;
1302 int dst = term.c.x;
1303 int size = term.col - src;
1304
1305 term.dirty[term.c.y] = 1;
1306
1307 if(src >= term.col) {
1308 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1309 return;
1310 }
1311
1312 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1313 size * sizeof(Glyph));
1314 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1315 }
1316
1317 void
1318 tinsertblank(int n) {
1319 int src = term.c.x;
1320 int dst = src + n;
1321 int size = term.col - dst;
1322
1323 term.dirty[term.c.y] = 1;
1324
1325 if(dst >= term.col) {
1326 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1327 return;
1328 }
1329
1330 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1331 size * sizeof(Glyph));
1332 tclearregion(src, term.c.y, dst - 1, term.c.y);
1333 }
1334
1335 void
1336 tinsertblankline(int n) {
1337 if(term.c.y < term.top || term.c.y > term.bot)
1338 return;
1339
1340 tscrolldown(term.c.y, n);
1341 }
1342
1343 void
1344 tdeleteline(int n) {
1345 if(term.c.y < term.top || term.c.y > term.bot)
1346 return;
1347
1348 tscrollup(term.c.y, n);
1349 }
1350
1351 void
1352 tsetattr(int *attr, int l) {
1353 int i;
1354
1355 for(i = 0; i < l; i++) {
1356 switch(attr[i]) {
1357 case 0:
1358 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD \
1359 | ATTR_ITALIC | ATTR_BLINK);
1360 term.c.attr.fg = defaultfg;
1361 term.c.attr.bg = defaultbg;
1362 break;
1363 case 1:
1364 term.c.attr.mode |= ATTR_BOLD;
1365 break;
1366 case 3: /* enter standout (highlight) */
1367 term.c.attr.mode |= ATTR_ITALIC;
1368 break;
1369 case 4:
1370 term.c.attr.mode |= ATTR_UNDERLINE;
1371 break;
1372 case 5:
1373 term.c.attr.mode |= ATTR_BLINK;
1374 break;
1375 case 7:
1376 term.c.attr.mode |= ATTR_REVERSE;
1377 break;
1378 case 21:
1379 case 22:
1380 term.c.attr.mode &= ~ATTR_BOLD;
1381 break;
1382 case 23: /* leave standout (highlight) mode */
1383 term.c.attr.mode &= ~ATTR_ITALIC;
1384 break;
1385 case 24:
1386 term.c.attr.mode &= ~ATTR_UNDERLINE;
1387 break;
1388 case 25:
1389 term.c.attr.mode &= ~ATTR_BLINK;
1390 break;
1391 case 27:
1392 term.c.attr.mode &= ~ATTR_REVERSE;
1393 break;
1394 case 38:
1395 if(i + 2 < l && attr[i + 1] == 5) {
1396 i += 2;
1397 if(BETWEEN(attr[i], 0, 255)) {
1398 term.c.attr.fg = attr[i];
1399 } else {
1400 fprintf(stderr,
1401 "erresc: bad fgcolor %d\n",
1402 attr[i]);
1403 }
1404 } else {
1405 fprintf(stderr,
1406 "erresc(38): gfx attr %d unknown\n",
1407 attr[i]);
1408 }
1409 break;
1410 case 39:
1411 term.c.attr.fg = defaultfg;
1412 break;
1413 case 48:
1414 if(i + 2 < l && attr[i + 1] == 5) {
1415 i += 2;
1416 if(BETWEEN(attr[i], 0, 255)) {
1417 term.c.attr.bg = attr[i];
1418 } else {
1419 fprintf(stderr,
1420 "erresc: bad bgcolor %d\n",
1421 attr[i]);
1422 }
1423 } else {
1424 fprintf(stderr,
1425 "erresc(48): gfx attr %d unknown\n",
1426 attr[i]);
1427 }
1428 break;
1429 case 49:
1430 term.c.attr.bg = defaultbg;
1431 break;
1432 default:
1433 if(BETWEEN(attr[i], 30, 37)) {
1434 term.c.attr.fg = attr[i] - 30;
1435 } else if(BETWEEN(attr[i], 40, 47)) {
1436 term.c.attr.bg = attr[i] - 40;
1437 } else if(BETWEEN(attr[i], 90, 97)) {
1438 term.c.attr.fg = attr[i] - 90 + 8;
1439 } else if(BETWEEN(attr[i], 100, 107)) {
1440 term.c.attr.bg = attr[i] - 100 + 8;
1441 } else {
1442 fprintf(stderr,
1443 "erresc(default): gfx attr %d unknown\n",
1444 attr[i]), csidump();
1445 }
1446 break;
1447 }
1448 }
1449 }
1450
1451 void
1452 tsetscroll(int t, int b) {
1453 int temp;
1454
1455 LIMIT(t, 0, term.row-1);
1456 LIMIT(b, 0, term.row-1);
1457 if(t > b) {
1458 temp = t;
1459 t = b;
1460 b = temp;
1461 }
1462 term.top = t;
1463 term.bot = b;
1464 }
1465
1466 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1467
1468 void
1469 tsetmode(bool priv, bool set, int *args, int narg) {
1470 int *lim, mode;
1471 bool alt;
1472
1473 for(lim = args + narg; args < lim; ++args) {
1474 if(priv) {
1475 switch(*args) {
1476 break;
1477 case 1: /* DECCKM -- Cursor key */
1478 MODBIT(term.mode, set, MODE_APPCURSOR);
1479 break;
1480 case 5: /* DECSCNM -- Reverse video */
1481 mode = term.mode;
1482 MODBIT(term.mode, set, MODE_REVERSE);
1483 if(mode != term.mode)
1484 redraw();
1485 break;
1486 case 6: /* DECOM -- Origin */
1487 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1488 tmoveato(0, 0);
1489 break;
1490 case 7: /* DECAWM -- Auto wrap */
1491 MODBIT(term.mode, set, MODE_WRAP);
1492 break;
1493 case 0: /* Error (IGNORED) */
1494 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1495 case 3: /* DECCOLM -- Column (IGNORED) */
1496 case 4: /* DECSCLM -- Scroll (IGNORED) */
1497 case 8: /* DECARM -- Auto repeat (IGNORED) */
1498 case 18: /* DECPFF -- Printer feed (IGNORED) */
1499 case 19: /* DECPEX -- Printer extent (IGNORED) */
1500 case 42: /* DECNRCM -- National characters (IGNORED) */
1501 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1502 break;
1503 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1504 MODBIT(term.mode, !set, MODE_HIDE);
1505 break;
1506 case 1000: /* 1000,1002: enable xterm mouse report */
1507 MODBIT(term.mode, set, MODE_MOUSEBTN);
1508 break;
1509 case 1002:
1510 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1511 break;
1512 case 1049: /* = 1047 and 1048 */
1513 case 47:
1514 case 1047: {
1515 alt = IS_SET(MODE_ALTSCREEN);
1516 if(alt)
1517 tclearregion(0, 0, term.col-1, term.row-1);
1518 if(set ^ alt) /* set is always 1 or 0 */
1519 tswapscreen();
1520 if(*args != 1049)
1521 break;
1522 }
1523 /* pass through */
1524 case 1048:
1525 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1526 break;
1527 default:
1528 fprintf(stderr,
1529 "erresc: unknown private set/reset mode %d\n",
1530 *args);
1531 break;
1532 }
1533 } else {
1534 switch(*args) {
1535 case 0: /* Error (IGNORED) */
1536 break;
1537 case 2: /* KAM -- keyboard action */
1538 MODBIT(term.mode, set, MODE_KBDLOCK);
1539 break;
1540 case 4: /* IRM -- Insertion-replacement */
1541 MODBIT(term.mode, set, MODE_INSERT);
1542 break;
1543 case 12: /* SRM -- Send/Receive */
1544 MODBIT(term.mode, !set, MODE_ECHO);
1545 break;
1546 case 20: /* LNM -- Linefeed/new line */
1547 MODBIT(term.mode, set, MODE_CRLF);
1548 break;
1549 default:
1550 fprintf(stderr,
1551 "erresc: unknown set/reset mode %d\n",
1552 *args);
1553 break;
1554 }
1555 }
1556 }
1557 }
1558 #undef MODBIT
1559
1560
1561 void
1562 csihandle(void) {
1563 switch(csiescseq.mode) {
1564 default:
1565 unknown:
1566 fprintf(stderr, "erresc: unknown csi ");
1567 csidump();
1568 /* die(""); */
1569 break;
1570 case '@': /* ICH -- Insert <n> blank char */
1571 DEFAULT(csiescseq.arg[0], 1);
1572 tinsertblank(csiescseq.arg[0]);
1573 break;
1574 case 'A': /* CUU -- Cursor <n> Up */
1575 DEFAULT(csiescseq.arg[0], 1);
1576 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1577 break;
1578 case 'B': /* CUD -- Cursor <n> Down */
1579 case 'e': /* VPR --Cursor <n> Down */
1580 DEFAULT(csiescseq.arg[0], 1);
1581 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1582 break;
1583 case 'c': /* DA -- Device Attributes */
1584 if(csiescseq.arg[0] == 0)
1585 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1586 break;
1587 case 'C': /* CUF -- Cursor <n> Forward */
1588 case 'a': /* HPR -- Cursor <n> Forward */
1589 DEFAULT(csiescseq.arg[0], 1);
1590 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1591 break;
1592 case 'D': /* CUB -- Cursor <n> Backward */
1593 DEFAULT(csiescseq.arg[0], 1);
1594 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1595 break;
1596 case 'E': /* CNL -- Cursor <n> Down and first col */
1597 DEFAULT(csiescseq.arg[0], 1);
1598 tmoveto(0, term.c.y+csiescseq.arg[0]);
1599 break;
1600 case 'F': /* CPL -- Cursor <n> Up and first col */
1601 DEFAULT(csiescseq.arg[0], 1);
1602 tmoveto(0, term.c.y-csiescseq.arg[0]);
1603 break;
1604 case 'g': /* TBC -- Tabulation clear */
1605 switch (csiescseq.arg[0]) {
1606 case 0: /* clear current tab stop */
1607 term.tabs[term.c.x] = 0;
1608 break;
1609 case 3: /* clear all the tabs */
1610 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1611 break;
1612 default:
1613 goto unknown;
1614 }
1615 break;
1616 case 'G': /* CHA -- Move to <col> */
1617 case '`': /* HPA */
1618 DEFAULT(csiescseq.arg[0], 1);
1619 tmoveto(csiescseq.arg[0]-1, term.c.y);
1620 break;
1621 case 'H': /* CUP -- Move to <row> <col> */
1622 case 'f': /* HVP */
1623 DEFAULT(csiescseq.arg[0], 1);
1624 DEFAULT(csiescseq.arg[1], 1);
1625 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1626 break;
1627 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1628 DEFAULT(csiescseq.arg[0], 1);
1629 while(csiescseq.arg[0]--)
1630 tputtab(1);
1631 break;
1632 case 'J': /* ED -- Clear screen */
1633 sel.bx = -1;
1634 switch(csiescseq.arg[0]) {
1635 case 0: /* below */
1636 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1637 if(term.c.y < term.row-1)
1638 tclearregion(0, term.c.y+1, term.col-1, term.row-1);
1639 break;
1640 case 1: /* above */
1641 if(term.c.y > 1)
1642 tclearregion(0, 0, term.col-1, term.c.y-1);
1643 tclearregion(0, term.c.y, term.c.x, term.c.y);
1644 break;
1645 case 2: /* all */
1646 tclearregion(0, 0, term.col-1, term.row-1);
1647 break;
1648 default:
1649 goto unknown;
1650 }
1651 break;
1652 case 'K': /* EL -- Clear line */
1653 switch(csiescseq.arg[0]) {
1654 case 0: /* right */
1655 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1656 break;
1657 case 1: /* left */
1658 tclearregion(0, term.c.y, term.c.x, term.c.y);
1659 break;
1660 case 2: /* all */
1661 tclearregion(0, term.c.y, term.col-1, term.c.y);
1662 break;
1663 }
1664 break;
1665 case 'S': /* SU -- Scroll <n> line up */
1666 DEFAULT(csiescseq.arg[0], 1);
1667 tscrollup(term.top, csiescseq.arg[0]);
1668 break;
1669 case 'T': /* SD -- Scroll <n> line down */
1670 DEFAULT(csiescseq.arg[0], 1);
1671 tscrolldown(term.top, csiescseq.arg[0]);
1672 break;
1673 case 'L': /* IL -- Insert <n> blank lines */
1674 DEFAULT(csiescseq.arg[0], 1);
1675 tinsertblankline(csiescseq.arg[0]);
1676 break;
1677 case 'l': /* RM -- Reset Mode */
1678 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
1679 break;
1680 case 'M': /* DL -- Delete <n> lines */
1681 DEFAULT(csiescseq.arg[0], 1);
1682 tdeleteline(csiescseq.arg[0]);
1683 break;
1684 case 'X': /* ECH -- Erase <n> char */
1685 DEFAULT(csiescseq.arg[0], 1);
1686 tclearregion(term.c.x, term.c.y, term.c.x + csiescseq.arg[0], term.c.y);
1687 break;
1688 case 'P': /* DCH -- Delete <n> char */
1689 DEFAULT(csiescseq.arg[0], 1);
1690 tdeletechar(csiescseq.arg[0]);
1691 break;
1692 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
1693 DEFAULT(csiescseq.arg[0], 1);
1694 while(csiescseq.arg[0]--)
1695 tputtab(0);
1696 break;
1697 case 'd': /* VPA -- Move to <row> */
1698 DEFAULT(csiescseq.arg[0], 1);
1699 tmoveato(term.c.x, csiescseq.arg[0]-1);
1700 break;
1701 case 'h': /* SM -- Set terminal mode */
1702 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
1703 break;
1704 case 'm': /* SGR -- Terminal attribute (color) */
1705 tsetattr(csiescseq.arg, csiescseq.narg);
1706 break;
1707 case 'r': /* DECSTBM -- Set Scrolling Region */
1708 if(csiescseq.priv) {
1709 goto unknown;
1710 } else {
1711 DEFAULT(csiescseq.arg[0], 1);
1712 DEFAULT(csiescseq.arg[1], term.row);
1713 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
1714 tmoveato(0, 0);
1715 }
1716 break;
1717 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1718 tcursor(CURSOR_SAVE);
1719 break;
1720 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1721 tcursor(CURSOR_LOAD);
1722 break;
1723 }
1724 }
1725
1726 void
1727 csidump(void) {
1728 int i;
1729 uint c;
1730
1731 printf("ESC[");
1732 for(i = 0; i < csiescseq.len; i++) {
1733 c = csiescseq.buf[i] & 0xff;
1734 if(isprint(c)) {
1735 putchar(c);
1736 } else if(c == '\n') {
1737 printf("(\\n)");
1738 } else if(c == '\r') {
1739 printf("(\\r)");
1740 } else if(c == 0x1b) {
1741 printf("(\\e)");
1742 } else {
1743 printf("(%02x)", c);
1744 }
1745 }
1746 putchar('\n');
1747 }
1748
1749 void
1750 csireset(void) {
1751 memset(&csiescseq, 0, sizeof(csiescseq));
1752 }
1753
1754 void
1755 strhandle(void) {
1756 char *p;
1757
1758 /*
1759 * TODO: make this being useful in case of color palette change.
1760 */
1761 strparse();
1762
1763 p = strescseq.buf;
1764
1765 switch(strescseq.type) {
1766 case ']': /* OSC -- Operating System Command */
1767 switch(p[0]) {
1768 case '0':
1769 case '1':
1770 case '2':
1771 /*
1772 * TODO: Handle special chars in string, like umlauts.
1773 */
1774 if(p[1] == ';') {
1775 XStoreName(xw.dpy, xw.win, strescseq.buf+2);
1776 }
1777 break;
1778 case ';':
1779 XStoreName(xw.dpy, xw.win, strescseq.buf+1);
1780 break;
1781 case '4': /* TODO: Set color (arg0) to "rgb:%hexr/$hexg/$hexb" (arg1) */
1782 break;
1783 default:
1784 fprintf(stderr, "erresc: unknown str ");
1785 strdump();
1786 break;
1787 }
1788 break;
1789 case 'k': /* old title set compatibility */
1790 XStoreName(xw.dpy, xw.win, strescseq.buf);
1791 break;
1792 case 'P': /* DSC -- Device Control String */
1793 case '_': /* APC -- Application Program Command */
1794 case '^': /* PM -- Privacy Message */
1795 default:
1796 fprintf(stderr, "erresc: unknown str ");
1797 strdump();
1798 /* die(""); */
1799 break;
1800 }
1801 }
1802
1803 void
1804 strparse(void) {
1805 /*
1806 * TODO: Implement parsing like for CSI when required.
1807 * Format: ESC type cmd ';' arg0 [';' argn] ESC \
1808 */
1809 return;
1810 }
1811
1812 void
1813 strdump(void) {
1814 int i;
1815 uint c;
1816
1817 printf("ESC%c", strescseq.type);
1818 for(i = 0; i < strescseq.len; i++) {
1819 c = strescseq.buf[i] & 0xff;
1820 if(isprint(c)) {
1821 putchar(c);
1822 } else if(c == '\n') {
1823 printf("(\\n)");
1824 } else if(c == '\r') {
1825 printf("(\\r)");
1826 } else if(c == 0x1b) {
1827 printf("(\\e)");
1828 } else {
1829 printf("(%02x)", c);
1830 }
1831 }
1832 printf("ESC\\\n");
1833 }
1834
1835 void
1836 strreset(void) {
1837 memset(&strescseq, 0, sizeof(strescseq));
1838 }
1839
1840 void
1841 tputtab(bool forward) {
1842 uint x = term.c.x;
1843
1844 if(forward) {
1845 if(x == term.col)
1846 return;
1847 for(++x; x < term.col && !term.tabs[x]; ++x)
1848 /* nothing */ ;
1849 } else {
1850 if(x == 0)
1851 return;
1852 for(--x; x > 0 && !term.tabs[x]; --x)
1853 /* nothing */ ;
1854 }
1855 tmoveto(x, term.c.y);
1856 }
1857
1858 void
1859 techo(char *buf, int len) {
1860 for(; len > 0; buf++, len--) {
1861 char c = *buf;
1862
1863 if(c == '\033') { /* escape */
1864 tputc("^", 1);
1865 tputc("[", 1);
1866 } else if (c < '\x20') { /* control code */
1867 if(c != '\n' && c != '\r' && c != '\t') {
1868 c |= '\x40';
1869 tputc("^", 1);
1870 }
1871 tputc(&c, 1);
1872 } else {
1873 break;
1874 }
1875 }
1876 if (len)
1877 tputc(buf, len);
1878 }
1879
1880 void
1881 tputc(char *c, int len) {
1882 uchar ascii = *c;
1883 bool control = ascii < '\x20' || ascii == 0177;
1884
1885 if(iofd != -1) {
1886 if (xwrite(iofd, c, len) < 0) {
1887 fprintf(stderr, "Error writting in %s:%s\n",
1888 opt_io, strerror(errno));
1889 close(iofd);
1890 iofd = -1;
1891 }
1892 }
1893 /*
1894 * STR sequences must be checked before anything else
1895 * because it can use some control codes as part of the sequence.
1896 */
1897 if(term.esc & ESC_STR) {
1898 switch(ascii) {
1899 case '\033':
1900 term.esc = ESC_START | ESC_STR_END;
1901 break;
1902 case '\a': /* backwards compatibility to xterm */
1903 term.esc = 0;
1904 strhandle();
1905 break;
1906 default:
1907 strescseq.buf[strescseq.len++] = ascii;
1908 if(strescseq.len+1 >= STR_BUF_SIZ) {
1909 term.esc = 0;
1910 strhandle();
1911 }
1912 }
1913 return;
1914 }
1915
1916 /*
1917 * Actions of control codes must be performed as soon they arrive
1918 * because they can be embedded inside a control sequence, and
1919 * they must not cause conflicts with sequences.
1920 */
1921 if(control) {
1922 switch(ascii) {
1923 case '\t': /* HT */
1924 tputtab(1);
1925 return;
1926 case '\b': /* BS */
1927 tmoveto(term.c.x-1, term.c.y);
1928 return;
1929 case '\r': /* CR */
1930 tmoveto(0, term.c.y);
1931 return;
1932 case '\f': /* LF */
1933 case '\v': /* VT */
1934 case '\n': /* LF */
1935 /* go to first col if the mode is set */
1936 tnewline(IS_SET(MODE_CRLF));
1937 return;
1938 case '\a': /* BEL */
1939 if(!(xw.state & WIN_FOCUSED))
1940 xseturgency(1);
1941 return;
1942 case '\033': /* ESC */
1943 csireset();
1944 term.esc = ESC_START;
1945 return;
1946 case '\016': /* SO */
1947 term.c.attr.mode |= ATTR_GFX;
1948 return;
1949 case '\017': /* SI */
1950 term.c.attr.mode &= ~ATTR_GFX;
1951 return;
1952 case '\032': /* SUB */
1953 case '\030': /* CAN */
1954 csireset();
1955 return;
1956 case '\005': /* ENQ (IGNORED) */
1957 case '\000': /* NUL (IGNORED) */
1958 case '\021': /* XON (IGNORED) */
1959 case '\023': /* XOFF (IGNORED) */
1960 case 0177: /* DEL (IGNORED) */
1961 return;
1962 }
1963 } else if(term.esc & ESC_START) {
1964 if(term.esc & ESC_CSI) {
1965 csiescseq.buf[csiescseq.len++] = ascii;
1966 if(BETWEEN(ascii, 0x40, 0x7E)
1967 || csiescseq.len >= ESC_BUF_SIZ) {
1968 term.esc = 0;
1969 csiparse(), csihandle();
1970 }
1971 } else if(term.esc & ESC_STR_END) {
1972 term.esc = 0;
1973 if(ascii == '\\')
1974 strhandle();
1975 } else if(term.esc & ESC_ALTCHARSET) {
1976 switch(ascii) {
1977 case '0': /* Line drawing set */
1978 term.c.attr.mode |= ATTR_GFX;
1979 break;
1980 case 'B': /* USASCII */
1981 term.c.attr.mode &= ~ATTR_GFX;
1982 break;
1983 case 'A': /* UK (IGNORED) */
1984 case '<': /* multinational charset (IGNORED) */
1985 case '5': /* Finnish (IGNORED) */
1986 case 'C': /* Finnish (IGNORED) */
1987 case 'K': /* German (IGNORED) */
1988 break;
1989 default:
1990 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
1991 }
1992 term.esc = 0;
1993 } else if(term.esc & ESC_TEST) {
1994 if(ascii == '8') { /* DEC screen alignment test. */
1995 char E[UTF_SIZ] = "E";
1996 int x, y;
1997
1998 for(x = 0; x < term.col; ++x) {
1999 for(y = 0; y < term.row; ++y)
2000 tsetchar(E, &term.c.attr, x, y);
2001 }
2002 }
2003 term.esc = 0;
2004 } else {
2005 switch(ascii) {
2006 case '[':
2007 term.esc |= ESC_CSI;
2008 break;
2009 case '#':
2010 term.esc |= ESC_TEST;
2011 break;
2012 case 'P': /* DCS -- Device Control String */
2013 case '_': /* APC -- Application Program Command */
2014 case '^': /* PM -- Privacy Message */
2015 case ']': /* OSC -- Operating System Command */
2016 case 'k': /* old title set compatibility */
2017 strreset();
2018 strescseq.type = ascii;
2019 term.esc |= ESC_STR;
2020 break;
2021 case '(': /* set primary charset G0 */
2022 term.esc |= ESC_ALTCHARSET;
2023 break;
2024 case ')': /* set secondary charset G1 (IGNORED) */
2025 case '*': /* set tertiary charset G2 (IGNORED) */
2026 case '+': /* set quaternary charset G3 (IGNORED) */
2027 term.esc = 0;
2028 break;
2029 case 'D': /* IND -- Linefeed */
2030 if(term.c.y == term.bot) {
2031 tscrollup(term.top, 1);
2032 } else {
2033 tmoveto(term.c.x, term.c.y+1);
2034 }
2035 term.esc = 0;
2036 break;
2037 case 'E': /* NEL -- Next line */
2038 tnewline(1); /* always go to first col */
2039 term.esc = 0;
2040 break;
2041 case 'H': /* HTS -- Horizontal tab stop */
2042 term.tabs[term.c.x] = 1;
2043 term.esc = 0;
2044 break;
2045 case 'M': /* RI -- Reverse index */
2046 if(term.c.y == term.top) {
2047 tscrolldown(term.top, 1);
2048 } else {
2049 tmoveto(term.c.x, term.c.y-1);
2050 }
2051 term.esc = 0;
2052 break;
2053 case 'Z': /* DECID -- Identify Terminal */
2054 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2055 term.esc = 0;
2056 break;
2057 case 'c': /* RIS -- Reset to inital state */
2058 treset();
2059 term.esc = 0;
2060 xresettitle();
2061 break;
2062 case '=': /* DECPAM -- Application keypad */
2063 term.mode |= MODE_APPKEYPAD;
2064 term.esc = 0;
2065 break;
2066 case '>': /* DECPNM -- Normal keypad */
2067 term.mode &= ~MODE_APPKEYPAD;
2068 term.esc = 0;
2069 break;
2070 case '7': /* DECSC -- Save Cursor */
2071 tcursor(CURSOR_SAVE);
2072 term.esc = 0;
2073 break;
2074 case '8': /* DECRC -- Restore Cursor */
2075 tcursor(CURSOR_LOAD);
2076 term.esc = 0;
2077 break;
2078 case '\\': /* ST -- Stop */
2079 term.esc = 0;
2080 break;
2081 default:
2082 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2083 (uchar) ascii, isprint(ascii)? ascii:'.');
2084 term.esc = 0;
2085 }
2086 }
2087 /*
2088 * All characters which form part of a sequence are not
2089 * printed
2090 */
2091 return;
2092 }
2093 /*
2094 * Display control codes only if we are in graphic mode
2095 */
2096 if(control && !(term.c.attr.mode & ATTR_GFX))
2097 return;
2098 if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
2099 sel.bx = -1;
2100 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
2101 tnewline(1); /* always go to first col */
2102
2103 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col) {
2104 memmove(&term.line[term.c.y][term.c.x+1],
2105 &term.line[term.c.y][term.c.x],
2106 (term.col - term.c.x - 1) * sizeof(Glyph));
2107 }
2108
2109 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2110 if(term.c.x+1 < term.col) {
2111 tmoveto(term.c.x+1, term.c.y);
2112 } else {
2113 term.c.state |= CURSOR_WRAPNEXT;
2114 }
2115 }
2116
2117 int
2118 tresize(int col, int row) {
2119 int i, x;
2120 int minrow = MIN(row, term.row);
2121 int mincol = MIN(col, term.col);
2122 int slide = term.c.y - row + 1;
2123 bool *bp;
2124
2125 if(col < 1 || row < 1)
2126 return 0;
2127
2128 /* free unneeded rows */
2129 i = 0;
2130 if(slide > 0) {
2131 /* slide screen to keep cursor where we expect it -
2132 * tscrollup would work here, but we can optimize to
2133 * memmove because we're freeing the earlier lines */
2134 for(/* i = 0 */; i < slide; i++) {
2135 free(term.line[i]);
2136 free(term.alt[i]);
2137 }
2138 memmove(term.line, term.line + slide, row * sizeof(Line));
2139 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2140 }
2141 for(i += row; i < term.row; i++) {
2142 free(term.line[i]);
2143 free(term.alt[i]);
2144 }
2145
2146 /* resize to new height */
2147 term.line = xrealloc(term.line, row * sizeof(Line));
2148 term.alt = xrealloc(term.alt, row * sizeof(Line));
2149 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2150 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2151
2152 /* resize each row to new width, zero-pad if needed */
2153 for(i = 0; i < minrow; i++) {
2154 term.dirty[i] = 1;
2155 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2156 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2157 for(x = mincol; x < col; x++) {
2158 term.line[i][x].state = 0;
2159 term.alt[i][x].state = 0;
2160 }
2161 }
2162
2163 /* allocate any new rows */
2164 for(/* i == minrow */; i < row; i++) {
2165 term.dirty[i] = 1;
2166 term.line[i] = xcalloc(col, sizeof(Glyph));
2167 term.alt [i] = xcalloc(col, sizeof(Glyph));
2168 }
2169 if(col > term.col) {
2170 bp = term.tabs + term.col;
2171
2172 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2173 while(--bp > term.tabs && !*bp)
2174 /* nothing */ ;
2175 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2176 *bp = 1;
2177 }
2178 /* update terminal size */
2179 term.col = col;
2180 term.row = row;
2181 /* reset scrolling region */
2182 tsetscroll(0, row-1);
2183 /* make use of the LIMIT in tmoveto */
2184 tmoveto(term.c.x, term.c.y);
2185
2186 return (slide > 0);
2187 }
2188
2189 void
2190 xresize(int col, int row) {
2191 xw.tw = MAX(1, col * xw.cw);
2192 xw.th = MAX(1, row * xw.ch);
2193
2194 XftDrawChange(xw.draw, xw.buf);
2195 }
2196
2197 void
2198 xloadcols(void) {
2199 int i, r, g, b;
2200 XRenderColor color = { .alpha = 0 };
2201
2202 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
2203 for(i = 0; i < LEN(colorname); i++) {
2204 if(!colorname[i])
2205 continue;
2206 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2207 die("Could not allocate color '%s'\n", colorname[i]);
2208 }
2209 }
2210
2211 /* load colors [16-255] ; same colors as xterm */
2212 for(i = 16, r = 0; r < 6; r++) {
2213 for(g = 0; g < 6; g++) {
2214 for(b = 0; b < 6; b++) {
2215 color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
2216 color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
2217 color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
2218 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i])) {
2219 die("Could not allocate color %d\n", i);
2220 }
2221 i++;
2222 }
2223 }
2224 }
2225
2226 for(r = 0; r < 24; r++, i++) {
2227 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
2228 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color,
2229 &dc.col[i])) {
2230 die("Could not allocate color %d\n", i);
2231 }
2232 }
2233 }
2234
2235 void
2236 xtermclear(int col1, int row1, int col2, int row2) {
2237 XftDrawRect(xw.draw,
2238 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2239 borderpx + col1 * xw.cw,
2240 borderpx + row1 * xw.ch,
2241 (col2-col1+1) * xw.cw,
2242 (row2-row1+1) * xw.ch);
2243 }
2244
2245 /*
2246 * Absolute coordinates.
2247 */
2248 void
2249 xclear(int x1, int y1, int x2, int y2) {
2250 XftDrawRect(xw.draw,
2251 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2252 x1, y1, x2-x1, y2-y1);
2253 }
2254
2255 void
2256 xhints(void) {
2257 XClassHint class = {opt_class ? opt_class : termname, termname};
2258 XWMHints wm = {.flags = InputHint, .input = 1};
2259 XSizeHints *sizeh = NULL;
2260
2261 sizeh = XAllocSizeHints();
2262 if(xw.isfixed == False) {
2263 sizeh->flags = PSize | PResizeInc | PBaseSize;
2264 sizeh->height = xw.h;
2265 sizeh->width = xw.w;
2266 sizeh->height_inc = xw.ch;
2267 sizeh->width_inc = xw.cw;
2268 sizeh->base_height = 2 * borderpx;
2269 sizeh->base_width = 2 * borderpx;
2270 } else {
2271 sizeh->flags = PMaxSize | PMinSize;
2272 sizeh->min_width = sizeh->max_width = xw.fw;
2273 sizeh->min_height = sizeh->max_height = xw.fh;
2274 }
2275
2276 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
2277 XFree(sizeh);
2278 }
2279
2280 int
2281 xloadfont(Font *f, FcPattern *pattern) {
2282 FcPattern *match;
2283 FcResult result;
2284
2285 match = XftFontMatch(xw.dpy, xw.scr, pattern, &result);
2286 if(!match)
2287 return 1;
2288 if(!(f->set = XftFontOpenPattern(xw.dpy, match))) {
2289 FcPatternDestroy(match);
2290 return 1;
2291 }
2292
2293 f->ascent = f->set->ascent;
2294 f->descent = f->set->descent;
2295 f->lbearing = 0;
2296 f->rbearing = f->set->max_advance_width;
2297
2298 f->height = f->set->height;
2299 f->width = f->lbearing + f->rbearing;
2300
2301 return 0;
2302 }
2303
2304 void
2305 xloadfonts(char *fontstr, int fontsize) {
2306 FcPattern *pattern;
2307 FcResult result;
2308 double fontval;
2309
2310 if(fontstr[0] == '-') {
2311 pattern = XftXlfdParse(fontstr, False, False);
2312 } else {
2313 pattern = FcNameParse((FcChar8 *)fontstr);
2314 }
2315
2316 if(!pattern)
2317 die("st: can't open font %s\n", fontstr);
2318
2319 if(fontsize > 0) {
2320 FcPatternDel(pattern, FC_PIXEL_SIZE);
2321 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2322 usedfontsize = fontsize;
2323 } else {
2324 result = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2325 if(result == FcResultMatch) {
2326 usedfontsize = (int)fontval;
2327 } else {
2328 /*
2329 * Default font size is 12, if none given. This is to
2330 * have a known usedfontsize value.
2331 */
2332 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
2333 usedfontsize = 12;
2334 }
2335 }
2336
2337 if(xloadfont(&dc.font, pattern))
2338 die("st: can't open font %s\n", fontstr);
2339
2340 /* Setting character width and height. */
2341 xw.cw = dc.font.width;
2342 xw.ch = dc.font.height;
2343
2344 FcPatternDel(pattern, FC_WEIGHT);
2345 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
2346 if(xloadfont(&dc.bfont, pattern))
2347 die("st: can't open font %s\n", fontstr);
2348
2349 FcPatternDel(pattern, FC_SLANT);
2350 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
2351 if(xloadfont(&dc.ibfont, pattern))
2352 die("st: can't open font %s\n", fontstr);
2353
2354 FcPatternDel(pattern, FC_WEIGHT);
2355 if(xloadfont(&dc.ifont, pattern))
2356 die("st: can't open font %s\n", fontstr);
2357
2358 FcPatternDestroy(pattern);
2359 }
2360
2361 void
2362 xzoom(const Arg *arg)
2363 {
2364 xloadfonts(usedfont, usedfontsize + arg->i);
2365 cresize(0, 0);
2366 draw();
2367 }
2368
2369 void
2370 xinit(void) {
2371 XSetWindowAttributes attrs;
2372 Cursor cursor;
2373 Window parent;
2374 int sw, sh, major, minor;
2375
2376 if(!(xw.dpy = XOpenDisplay(NULL)))
2377 die("Can't open display\n");
2378 xw.scr = XDefaultScreen(xw.dpy);
2379 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
2380
2381 /* font */
2382 usedfont = (opt_font == NULL)? font : opt_font;
2383 xloadfonts(usedfont, 0);
2384
2385 /* colors */
2386 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
2387 xloadcols();
2388
2389 /* adjust fixed window geometry */
2390 if(xw.isfixed) {
2391 sw = DisplayWidth(xw.dpy, xw.scr);
2392 sh = DisplayHeight(xw.dpy, xw.scr);
2393 if(xw.fx < 0)
2394 xw.fx = sw + xw.fx - xw.fw - 1;
2395 if(xw.fy < 0)
2396 xw.fy = sh + xw.fy - xw.fh - 1;
2397
2398 xw.h = xw.fh;
2399 xw.w = xw.fw;
2400 } else {
2401 /* window - default size */
2402 xw.h = 2 * borderpx + term.row * xw.ch;
2403 xw.w = 2 * borderpx + term.col * xw.cw;
2404 xw.fx = 0;
2405 xw.fy = 0;
2406 }
2407
2408 attrs.background_pixel = dc.col[defaultbg].pixel;
2409 attrs.border_pixel = dc.col[defaultbg].pixel;
2410 attrs.bit_gravity = NorthWestGravity;
2411 attrs.event_mask = FocusChangeMask | KeyPressMask
2412 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
2413 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
2414 attrs.colormap = xw.cmap;
2415
2416 parent = opt_embed ? strtol(opt_embed, NULL, 0) : XRootWindow(xw.dpy, xw.scr);
2417 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
2418 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
2419 xw.vis,
2420 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
2421 | CWColormap,
2422 &attrs);
2423
2424 /* double buffering */
2425 if(!XdbeQueryExtension(xw.dpy, &major, &minor))
2426 die("Xdbe extension is not present\n");
2427 xw.buf = XdbeAllocateBackBufferName(xw.dpy, xw.win, XdbeCopied);
2428
2429 /* Xft rendering context */
2430 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
2431
2432 /* input methods */
2433 xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL);
2434 if(xw.xim == NULL)
2435 die("XOpenIM failed. Could not open input device.\n");
2436 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
2437 | XIMStatusNothing, XNClientWindow, xw.win,
2438 XNFocusWindow, xw.win, NULL);
2439 if(xw.xic == NULL)
2440 die("XCreateIC failed. Could not obtain input method.\n");
2441
2442 /* white cursor, black outline */
2443 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
2444 XDefineCursor(xw.dpy, xw.win, cursor);
2445 XRecolorCursor(xw.dpy, cursor,
2446 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
2447 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
2448
2449 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
2450 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
2451 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
2452
2453 xresettitle();
2454 XMapWindow(xw.dpy, xw.win);
2455 xhints();
2456 XSync(xw.dpy, 0);
2457 }
2458
2459 void
2460 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
2461 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
2462 width = charlen * xw.cw;
2463 Font *font = &dc.font;
2464 XGlyphInfo extents;
2465 Colour *fg = &dc.col[base.fg], *bg = &dc.col[base.bg],
2466 *temp, revfg, revbg;
2467 XRenderColor colfg, colbg;
2468
2469 if(base.mode & ATTR_BOLD) {
2470 if(BETWEEN(base.fg, 0, 7)) {
2471 /* basic system colors */
2472 fg = &dc.col[base.fg + 8];
2473 } else if(BETWEEN(base.fg, 16, 195)) {
2474 /* 256 colors */
2475 fg = &dc.col[base.fg + 36];
2476 } else if(BETWEEN(base.fg, 232, 251)) {
2477 /* greyscale */
2478 fg = &dc.col[base.fg + 4];
2479 }
2480 /*
2481 * Those ranges will not be brightened:
2482 * 8 - 15 – bright system colors
2483 * 196 - 231 – highest 256 color cube
2484 * 252 - 255 – brightest colors in greyscale
2485 */
2486 font = &dc.bfont;
2487 }
2488
2489 if(base.mode & ATTR_ITALIC)
2490 font = &dc.ifont;
2491 if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD))
2492 font = &dc.ibfont;
2493
2494 if(IS_SET(MODE_REVERSE)) {
2495 if(fg == &dc.col[defaultfg]) {
2496 fg = &dc.col[defaultbg];
2497 } else {
2498 colfg.red = ~fg->color.red;
2499 colfg.green = ~fg->color.green;
2500 colfg.blue = ~fg->color.blue;
2501 colfg.alpha = fg->color.alpha;
2502 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
2503 fg = &revfg;
2504 }
2505
2506 if(bg == &dc.col[defaultbg]) {
2507 bg = &dc.col[defaultfg];
2508 } else {
2509 colbg.red = ~bg->color.red;
2510 colbg.green = ~bg->color.green;
2511 colbg.blue = ~bg->color.blue;
2512 colbg.alpha = bg->color.alpha;
2513 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &revbg);
2514 bg = &revbg;
2515 }
2516 }
2517
2518 if(base.mode & ATTR_REVERSE)
2519 temp = fg, fg = bg, bg = temp;
2520
2521 XftTextExtentsUtf8(xw.dpy, font->set, (FcChar8 *)s, bytelen,
2522 &extents);
2523 width = extents.xOff;
2524
2525 /* Intelligent cleaning up of the borders. */
2526 if(x == 0) {
2527 xclear(0, (y == 0)? 0 : winy, borderpx,
2528 winy + xw.ch + ((y == term.row-1)? xw.h : 0));
2529 }
2530 if(x + charlen >= term.col-1) {
2531 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
2532 ((y == term.row-1)? xw.h : (winy + xw.ch)));
2533 }
2534 if(y == 0)
2535 xclear(winx, 0, winx + width, borderpx);
2536 if(y == term.row-1)
2537 xclear(winx, winy + xw.ch, winx + width, xw.h);
2538
2539 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
2540 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
2541 winy + font->ascent, (FcChar8 *)s, bytelen);
2542
2543 if(base.mode & ATTR_UNDERLINE) {
2544 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
2545 width, 1);
2546 }
2547 }
2548
2549 void
2550 xdrawcursor(void) {
2551 static int oldx = 0, oldy = 0;
2552 int sl;
2553 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs, 0};
2554
2555 LIMIT(oldx, 0, term.col-1);
2556 LIMIT(oldy, 0, term.row-1);
2557
2558 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
2559 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
2560
2561 /* remove the old cursor */
2562 if(term.line[oldy][oldx].state & GLYPH_SET) {
2563 sl = utf8size(term.line[oldy][oldx].c);
2564 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
2565 oldy, 1, sl);
2566 } else {
2567 xtermclear(oldx, oldy, oldx, oldy);
2568 }
2569
2570 /* draw the new one */
2571 if(!(IS_SET(MODE_HIDE))) {
2572 if(!(xw.state & WIN_FOCUSED))
2573 g.bg = defaultucs;
2574
2575 if(IS_SET(MODE_REVERSE))
2576 g.mode |= ATTR_REVERSE, g.fg = defaultcs, g.bg = defaultfg;
2577
2578 sl = utf8size(g.c);
2579 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
2580 oldx = term.c.x, oldy = term.c.y;
2581 }
2582 }
2583
2584 void
2585 xresettitle(void) {
2586 XStoreName(xw.dpy, xw.win, opt_title ? opt_title : "st");
2587 }
2588
2589 void
2590 redraw(void) {
2591 struct timespec tv = {0, REDRAW_TIMEOUT * 1000};
2592
2593 tfulldirt();
2594 draw();
2595 XSync(xw.dpy, False); /* necessary for a good tput flash */
2596 nanosleep(&tv, NULL);
2597 }
2598
2599 void
2600 draw(void) {
2601 XdbeSwapInfo swpinfo[1] = {{xw.win, XdbeCopied}};
2602
2603 drawregion(0, 0, term.col, term.row);
2604 XdbeSwapBuffers(xw.dpy, swpinfo, 1);
2605 }
2606
2607 void
2608 drawregion(int x1, int y1, int x2, int y2) {
2609 int ic, ib, x, y, ox, sl;
2610 Glyph base, new;
2611 char buf[DRAW_BUF_SIZ];
2612 bool ena_sel = sel.bx != -1;
2613
2614 if(sel.alt ^ IS_SET(MODE_ALTSCREEN))
2615 ena_sel = 0;
2616
2617 if(!(xw.state & WIN_VISIBLE))
2618 return;
2619
2620 for(y = y1; y < y2; y++) {
2621 if(!term.dirty[y])
2622 continue;
2623
2624 xtermclear(0, y, term.col, y);
2625 term.dirty[y] = 0;
2626 base = term.line[y][0];
2627 ic = ib = ox = 0;
2628 for(x = x1; x < x2; x++) {
2629 new = term.line[y][x];
2630 if(ena_sel && *(new.c) && selected(x, y))
2631 new.mode ^= ATTR_REVERSE;
2632 if(ib > 0 && (!(new.state & GLYPH_SET)
2633 || ATTRCMP(base, new)
2634 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
2635 xdraws(buf, base, ox, y, ic, ib);
2636 ic = ib = 0;
2637 }
2638 if(new.state & GLYPH_SET) {
2639 if(ib == 0) {
2640 ox = x;
2641 base = new;
2642 }
2643 sl = utf8size(new.c);
2644 memcpy(buf+ib, new.c, sl);
2645 ib += sl;
2646 ++ic;
2647 }
2648 }
2649 if(ib > 0)
2650 xdraws(buf, base, ox, y, ic, ib);
2651 }
2652 xdrawcursor();
2653 }
2654
2655 void
2656 expose(XEvent *ev) {
2657 XExposeEvent *e = &ev->xexpose;
2658
2659 if(xw.state & WIN_REDRAW) {
2660 if(!e->count)
2661 xw.state &= ~WIN_REDRAW;
2662 }
2663 }
2664
2665 void
2666 visibility(XEvent *ev) {
2667 XVisibilityEvent *e = &ev->xvisibility;
2668
2669 if(e->state == VisibilityFullyObscured) {
2670 xw.state &= ~WIN_VISIBLE;
2671 } else if(!(xw.state & WIN_VISIBLE)) {
2672 /* need a full redraw for next Expose, not just a buf copy */
2673 xw.state |= WIN_VISIBLE | WIN_REDRAW;
2674 }
2675 }
2676
2677 void
2678 unmap(XEvent *ev) {
2679 xw.state &= ~WIN_VISIBLE;
2680 }
2681
2682 void
2683 xseturgency(int add) {
2684 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
2685
2686 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
2687 XSetWMHints(xw.dpy, xw.win, h);
2688 XFree(h);
2689 }
2690
2691 void
2692 focus(XEvent *ev) {
2693 if(ev->type == FocusIn) {
2694 XSetICFocus(xw.xic);
2695 xw.state |= WIN_FOCUSED;
2696 xseturgency(0);
2697 } else {
2698 XUnsetICFocus(xw.xic);
2699 xw.state &= ~WIN_FOCUSED;
2700 }
2701 }
2702
2703 inline bool
2704 match(uint mask, uint state) {
2705 if(mask == XK_NO_MOD && state)
2706 return false;
2707 if(mask != XK_ANY_MOD && mask != XK_NO_MOD && !state)
2708 return false;
2709 if((state & mask) != state)
2710 return false;
2711 return true;
2712 }
2713
2714 void
2715 numlock(const Arg *dummy) {
2716 term.numlock ^= 1;
2717 }
2718
2719 char*
2720 kmap(KeySym k, uint state) {
2721 uint mask;
2722 Key *kp;
2723 int i;
2724
2725 /* Check for mapped keys out of X11 function keys. */
2726 for(i = 0; i < LEN(mappedkeys); i++) {
2727 if(mappedkeys[i] == k)
2728 break;
2729 }
2730 if(i == LEN(mappedkeys)) {
2731 if((k & 0xFFFF) < 0xFD00)
2732 return NULL;
2733 }
2734
2735 for(kp = key; kp < key + LEN(key); kp++) {
2736 mask = kp->mask;
2737
2738 if(kp->k != k)
2739 continue;
2740
2741 if(!match(mask, state))
2742 continue;
2743
2744 if(kp->appkey > 0) {
2745 if(!IS_SET(MODE_APPKEYPAD))
2746 continue;
2747 if(term.numlock && kp->appkey == 2)
2748 continue;
2749 } else if(kp->appkey < 0 && IS_SET(MODE_APPKEYPAD)) {
2750 continue;
2751 }
2752
2753 if((kp->appcursor < 0 && IS_SET(MODE_APPCURSOR)) ||
2754 (kp->appcursor > 0
2755 && !IS_SET(MODE_APPCURSOR))) {
2756 continue;
2757 }
2758
2759 if((kp->crlf < 0 && IS_SET(MODE_CRLF)) ||
2760 (kp->crlf > 0 && !IS_SET(MODE_CRLF))) {
2761 continue;
2762 }
2763
2764 return kp->s;
2765 }
2766
2767 return NULL;
2768 }
2769
2770 void
2771 kpress(XEvent *ev) {
2772 XKeyEvent *e = &ev->xkey;
2773 KeySym ksym;
2774 char xstr[31], buf[32], *customkey, *cp = buf;
2775 int len;
2776 Status status;
2777 Shortcut *bp;
2778
2779 if (IS_SET(MODE_KBDLOCK))
2780 return;
2781
2782 len = XmbLookupString(xw.xic, e, xstr, sizeof(xstr), &ksym, &status);
2783 e->state &= ~Mod2Mask;
2784 /* 1. shortcuts */
2785 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
2786 if(ksym == bp->keysym && match(bp->mod, e->state)) {
2787 bp->func(&(bp->arg));
2788 return;
2789 }
2790 }
2791
2792 /* 2. custom keys from config.h */
2793 if((customkey = kmap(ksym, e->state))) {
2794 len = strlen(customkey);
2795 memcpy(buf, customkey, len);
2796 /* 2. hardcoded (overrides X lookup) */
2797 } else {
2798 if(len == 0)
2799 return;
2800
2801 if (len == 1 && e->state & Mod1Mask)
2802 *cp++ = '\033';
2803
2804 memcpy(cp, xstr, len);
2805 len = cp - buf + len;
2806 }
2807
2808 ttywrite(buf, len);
2809 if(IS_SET(MODE_ECHO))
2810 techo(buf, len);
2811 }
2812
2813
2814 void
2815 cmessage(XEvent *e) {
2816 /* See xembed specs
2817 http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html */
2818 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
2819 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
2820 xw.state |= WIN_FOCUSED;
2821 xseturgency(0);
2822 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
2823 xw.state &= ~WIN_FOCUSED;
2824 }
2825 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
2826 /* Send SIGHUP to shell */
2827 kill(pid, SIGHUP);
2828 exit(EXIT_SUCCESS);
2829 }
2830 }
2831
2832 void
2833 cresize(int width, int height)
2834 {
2835 int col, row;
2836
2837 if(width != 0)
2838 xw.w = width;
2839 if(height != 0)
2840 xw.h = height;
2841
2842 col = (xw.w - 2 * borderpx) / xw.cw;
2843 row = (xw.h - 2 * borderpx) / xw.ch;
2844
2845 tresize(col, row);
2846 xresize(col, row);
2847 ttyresize();
2848 }
2849
2850 void
2851 resize(XEvent *e) {
2852 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
2853 return;
2854
2855 cresize(e->xconfigure.width, e->xconfigure.height);
2856 }
2857
2858 void
2859 run(void) {
2860 XEvent ev;
2861 fd_set rfd;
2862 int xfd = XConnectionNumber(xw.dpy), i;
2863 struct timeval drawtimeout, *tv = NULL;
2864
2865 for(i = 0;; i++) {
2866 FD_ZERO(&rfd);
2867 FD_SET(cmdfd, &rfd);
2868 FD_SET(xfd, &rfd);
2869 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
2870 if(errno == EINTR)
2871 continue;
2872 die("select failed: %s\n", SERRNO);
2873 }
2874
2875 /*
2876 * Stop after a certain number of reads so the user does not
2877 * feel like the system is stuttering.
2878 */
2879 if(i < 1000 && FD_ISSET(cmdfd, &rfd)) {
2880 ttyread();
2881
2882 /*
2883 * Just wait a bit so it isn't disturbing the
2884 * user and the system is able to write something.
2885 */
2886 drawtimeout.tv_sec = 0;
2887 drawtimeout.tv_usec = 5;
2888 tv = &drawtimeout;
2889 continue;
2890 }
2891 i = 0;
2892 tv = NULL;
2893
2894 while(XPending(xw.dpy)) {
2895 XNextEvent(xw.dpy, &ev);
2896 if(XFilterEvent(&ev, None))
2897 continue;
2898 if(handler[ev.type])
2899 (handler[ev.type])(&ev);
2900 }
2901
2902 draw();
2903 XFlush(xw.dpy);
2904 }
2905 }
2906
2907 int
2908 main(int argc, char *argv[]) {
2909 int i, bitm, xr, yr;
2910 uint wr, hr;
2911
2912 xw.fw = xw.fh = xw.fx = xw.fy = 0;
2913 xw.isfixed = False;
2914
2915 for(i = 1; i < argc; i++) {
2916 switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
2917 case 'c':
2918 if(++i < argc)
2919 opt_class = argv[i];
2920 break;
2921 case 'e':
2922 /* eat all remaining arguments */
2923 if(++i < argc)
2924 opt_cmd = &argv[i];
2925 goto run;
2926 case 'f':
2927 if(++i < argc)
2928 opt_font = argv[i];
2929 break;
2930 case 'g':
2931 if(++i >= argc)
2932 break;
2933
2934 bitm = XParseGeometry(argv[i], &xr, &yr, &wr, &hr);
2935 if(bitm & XValue)
2936 xw.fx = xr;
2937 if(bitm & YValue)
2938 xw.fy = yr;
2939 if(bitm & WidthValue)
2940 xw.fw = (int)wr;
2941 if(bitm & HeightValue)
2942 xw.fh = (int)hr;
2943 if(bitm & XNegative && xw.fx == 0)
2944 xw.fx = -1;
2945 if(bitm & XNegative && xw.fy == 0)
2946 xw.fy = -1;
2947
2948 if(xw.fh != 0 && xw.fw != 0)
2949 xw.isfixed = True;
2950 break;
2951 case 'o':
2952 if(++i < argc)
2953 opt_io = argv[i];
2954 break;
2955 case 't':
2956 if(++i < argc)
2957 opt_title = argv[i];
2958 break;
2959 case 'v':
2960 default:
2961 die(USAGE);
2962 case 'w':
2963 if(++i < argc)
2964 opt_embed = argv[i];
2965 break;
2966 }
2967 }
2968
2969 run:
2970 setlocale(LC_CTYPE, "");
2971 XSetLocaleModifiers("");
2972 tnew(80, 24);
2973 xinit();
2974 ttynew();
2975 selinit();
2976 run();
2977
2978 return 0;
2979 }
2980