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