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Fix bug restoring cursor position
[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 }
1080
1081 void
1082 tnew(int col, int row) {
1083 /* set screen size */
1084 term.row = row;
1085 term.col = col;
1086 term.line = xmalloc(term.row * sizeof(Line));
1087 term.alt = xmalloc(term.row * sizeof(Line));
1088 term.dirty = xmalloc(term.row * sizeof(*term.dirty));
1089 term.tabs = xmalloc(term.col * sizeof(*term.tabs));
1090
1091 for(row = 0; row < term.row; row++) {
1092 term.line[row] = xmalloc(term.col * sizeof(Glyph));
1093 term.alt [row] = xmalloc(term.col * sizeof(Glyph));
1094 term.dirty[row] = 0;
1095 }
1096 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1097 /* setup screen */
1098 treset();
1099 }
1100
1101 void
1102 tswapscreen(void) {
1103 Line *tmp = term.line;
1104
1105 term.line = term.alt;
1106 term.alt = tmp;
1107 term.mode ^= MODE_ALTSCREEN;
1108 tfulldirt();
1109 }
1110
1111 void
1112 tscrolldown(int orig, int n) {
1113 int i;
1114 Line temp;
1115
1116 LIMIT(n, 0, term.bot-orig+1);
1117
1118 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1119
1120 for(i = term.bot; i >= orig+n; i--) {
1121 temp = term.line[i];
1122 term.line[i] = term.line[i-n];
1123 term.line[i-n] = temp;
1124
1125 term.dirty[i] = 1;
1126 term.dirty[i-n] = 1;
1127 }
1128
1129 selscroll(orig, n);
1130 }
1131
1132 void
1133 tscrollup(int orig, int n) {
1134 int i;
1135 Line temp;
1136 LIMIT(n, 0, term.bot-orig+1);
1137
1138 tclearregion(0, orig, term.col-1, orig+n-1);
1139
1140 for(i = orig; i <= term.bot-n; i++) {
1141 temp = term.line[i];
1142 term.line[i] = term.line[i+n];
1143 term.line[i+n] = temp;
1144
1145 term.dirty[i] = 1;
1146 term.dirty[i+n] = 1;
1147 }
1148
1149 selscroll(orig, -n);
1150 }
1151
1152 void
1153 selscroll(int orig, int n) {
1154 if(sel.bx == -1)
1155 return;
1156
1157 if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
1158 if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
1159 sel.bx = -1;
1160 return;
1161 }
1162 if(sel.by < term.top) {
1163 sel.by = term.top;
1164 sel.bx = 0;
1165 }
1166 if(sel.ey > term.bot) {
1167 sel.ey = term.bot;
1168 sel.ex = term.col;
1169 }
1170 sel.b.y = sel.by, sel.b.x = sel.bx;
1171 sel.e.y = sel.ey, sel.e.x = sel.ex;
1172 }
1173 }
1174
1175 void
1176 tnewline(int first_col) {
1177 int y = term.c.y;
1178
1179 if(y == term.bot) {
1180 tscrollup(term.top, 1);
1181 } else {
1182 y++;
1183 }
1184 tmoveto(first_col ? 0 : term.c.x, y);
1185 }
1186
1187 void
1188 csiparse(void) {
1189 /* int noarg = 1; */
1190 char *p = csiescseq.buf;
1191
1192 csiescseq.narg = 0;
1193 if(*p == '?')
1194 csiescseq.priv = 1, p++;
1195
1196 while(p < csiescseq.buf+csiescseq.len) {
1197 while(isdigit(*p)) {
1198 csiescseq.arg[csiescseq.narg] *= 10;
1199 csiescseq.arg[csiescseq.narg] += *p++ - '0'/*, noarg = 0 */;
1200 }
1201 if(*p == ';' && csiescseq.narg+1 < ESC_ARG_SIZ) {
1202 csiescseq.narg++, p++;
1203 } else {
1204 csiescseq.mode = *p;
1205 csiescseq.narg++;
1206
1207 return;
1208 }
1209 }
1210 }
1211
1212 void
1213 tmoveto(int x, int y) {
1214 LIMIT(x, 0, term.col-1);
1215 LIMIT(y, 0, term.row-1);
1216 term.c.state &= ~CURSOR_WRAPNEXT;
1217 term.c.x = x;
1218 term.c.y = y;
1219 }
1220
1221 void
1222 tsetchar(char *c, Glyph *attr, int x, int y) {
1223 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1224 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1225 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1226 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1227 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1228 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1229 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1230 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1231 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1232 };
1233
1234 /*
1235 * The table is proudly stolen from rxvt.
1236 */
1237 if(attr->mode & ATTR_GFX) {
1238 if(c[0] >= 0x41 && c[0] <= 0x7e
1239 && vt100_0[c[0] - 0x41]) {
1240 c = vt100_0[c[0] - 0x41];
1241 }
1242 }
1243
1244 term.dirty[y] = 1;
1245 term.line[y][x] = *attr;
1246 memcpy(term.line[y][x].c, c, UTF_SIZ);
1247 term.line[y][x].state |= GLYPH_SET;
1248 }
1249
1250 void
1251 tclearregion(int x1, int y1, int x2, int y2) {
1252 int x, y, temp;
1253
1254 if(x1 > x2)
1255 temp = x1, x1 = x2, x2 = temp;
1256 if(y1 > y2)
1257 temp = y1, y1 = y2, y2 = temp;
1258
1259 LIMIT(x1, 0, term.col-1);
1260 LIMIT(x2, 0, term.col-1);
1261 LIMIT(y1, 0, term.row-1);
1262 LIMIT(y2, 0, term.row-1);
1263
1264 for(y = y1; y <= y2; y++) {
1265 term.dirty[y] = 1;
1266 for(x = x1; x <= x2; x++)
1267 term.line[y][x].state = 0;
1268 }
1269 }
1270
1271 void
1272 tdeletechar(int n) {
1273 int src = term.c.x + n;
1274 int dst = term.c.x;
1275 int size = term.col - src;
1276
1277 term.dirty[term.c.y] = 1;
1278
1279 if(src >= term.col) {
1280 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1281 return;
1282 }
1283
1284 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1285 size * sizeof(Glyph));
1286 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1287 }
1288
1289 void
1290 tinsertblank(int n) {
1291 int src = term.c.x;
1292 int dst = src + n;
1293 int size = term.col - dst;
1294
1295 term.dirty[term.c.y] = 1;
1296
1297 if(dst >= term.col) {
1298 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1299 return;
1300 }
1301
1302 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1303 size * sizeof(Glyph));
1304 tclearregion(src, term.c.y, dst - 1, term.c.y);
1305 }
1306
1307 void
1308 tinsertblankline(int n) {
1309 if(term.c.y < term.top || term.c.y > term.bot)
1310 return;
1311
1312 tscrolldown(term.c.y, n);
1313 }
1314
1315 void
1316 tdeleteline(int n) {
1317 if(term.c.y < term.top || term.c.y > term.bot)
1318 return;
1319
1320 tscrollup(term.c.y, n);
1321 }
1322
1323 void
1324 tsetattr(int *attr, int l) {
1325 int i;
1326
1327 for(i = 0; i < l; i++) {
1328 switch(attr[i]) {
1329 case 0:
1330 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD \
1331 | ATTR_ITALIC | ATTR_BLINK);
1332 term.c.attr.fg = defaultfg;
1333 term.c.attr.bg = defaultbg;
1334 break;
1335 case 1:
1336 term.c.attr.mode |= ATTR_BOLD;
1337 break;
1338 case 3: /* enter standout (highlight) */
1339 term.c.attr.mode |= ATTR_ITALIC;
1340 break;
1341 case 4:
1342 term.c.attr.mode |= ATTR_UNDERLINE;
1343 break;
1344 case 5:
1345 term.c.attr.mode |= ATTR_BLINK;
1346 break;
1347 case 7:
1348 term.c.attr.mode |= ATTR_REVERSE;
1349 break;
1350 case 21:
1351 case 22:
1352 term.c.attr.mode &= ~ATTR_BOLD;
1353 break;
1354 case 23: /* leave standout (highlight) mode */
1355 term.c.attr.mode &= ~ATTR_ITALIC;
1356 break;
1357 case 24:
1358 term.c.attr.mode &= ~ATTR_UNDERLINE;
1359 break;
1360 case 25:
1361 term.c.attr.mode &= ~ATTR_BLINK;
1362 break;
1363 case 27:
1364 term.c.attr.mode &= ~ATTR_REVERSE;
1365 break;
1366 case 38:
1367 if(i + 2 < l && attr[i + 1] == 5) {
1368 i += 2;
1369 if(BETWEEN(attr[i], 0, 255)) {
1370 term.c.attr.fg = attr[i];
1371 } else {
1372 fprintf(stderr,
1373 "erresc: bad fgcolor %d\n",
1374 attr[i]);
1375 }
1376 } else {
1377 fprintf(stderr,
1378 "erresc(38): gfx attr %d unknown\n",
1379 attr[i]);
1380 }
1381 break;
1382 case 39:
1383 term.c.attr.fg = defaultfg;
1384 break;
1385 case 48:
1386 if(i + 2 < l && attr[i + 1] == 5) {
1387 i += 2;
1388 if(BETWEEN(attr[i], 0, 255)) {
1389 term.c.attr.bg = attr[i];
1390 } else {
1391 fprintf(stderr,
1392 "erresc: bad bgcolor %d\n",
1393 attr[i]);
1394 }
1395 } else {
1396 fprintf(stderr,
1397 "erresc(48): gfx attr %d unknown\n",
1398 attr[i]);
1399 }
1400 break;
1401 case 49:
1402 term.c.attr.bg = defaultbg;
1403 break;
1404 default:
1405 if(BETWEEN(attr[i], 30, 37)) {
1406 term.c.attr.fg = attr[i] - 30;
1407 } else if(BETWEEN(attr[i], 40, 47)) {
1408 term.c.attr.bg = attr[i] - 40;
1409 } else if(BETWEEN(attr[i], 90, 97)) {
1410 term.c.attr.fg = attr[i] - 90 + 8;
1411 } else if(BETWEEN(attr[i], 100, 107)) {
1412 term.c.attr.bg = attr[i] - 100 + 8;
1413 } else {
1414 fprintf(stderr,
1415 "erresc(default): gfx attr %d unknown\n",
1416 attr[i]), csidump();
1417 }
1418 break;
1419 }
1420 }
1421 }
1422
1423 void
1424 tsetscroll(int t, int b) {
1425 int temp;
1426
1427 LIMIT(t, 0, term.row-1);
1428 LIMIT(b, 0, term.row-1);
1429 if(t > b) {
1430 temp = t;
1431 t = b;
1432 b = temp;
1433 }
1434 term.top = t;
1435 term.bot = b;
1436 }
1437
1438 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1439
1440 void
1441 tsetmode(bool priv, bool set, int *args, int narg) {
1442 int *lim, mode;
1443
1444 for(lim = args + narg; args < lim; ++args) {
1445 if(priv) {
1446 switch(*args) {
1447 break;
1448 case 1: /* DECCKM -- Cursor key */
1449 MODBIT(term.mode, set, MODE_APPKEYPAD);
1450 break;
1451 case 5: /* DECSCNM -- Reverse video */
1452 mode = term.mode;
1453 MODBIT(term.mode, set, MODE_REVERSE);
1454 if(mode != term.mode)
1455 redraw();
1456 break;
1457 case 6: /* XXX: DECOM -- Origin */
1458 break;
1459 case 7: /* DECAWM -- Auto wrap */
1460 MODBIT(term.mode, set, MODE_WRAP);
1461 break;
1462 case 8: /* XXX: DECARM -- Auto repeat */
1463 break;
1464 case 0: /* Error (IGNORED) */
1465 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1466 break;
1467 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1468 MODBIT(term.mode, !set, MODE_HIDE);
1469 break;
1470 case 1000: /* 1000,1002: enable xterm mouse report */
1471 MODBIT(term.mode, set, MODE_MOUSEBTN);
1472 break;
1473 case 1002:
1474 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1475 break;
1476 case 1049: /* = 1047 and 1048 */
1477 case 47:
1478 case 1047:
1479 if(IS_SET(MODE_ALTSCREEN))
1480 tclearregion(0, 0, term.col-1, term.row-1);
1481 if((set && !IS_SET(MODE_ALTSCREEN)) ||
1482 (!set && IS_SET(MODE_ALTSCREEN))) {
1483 tswapscreen();
1484 }
1485 if(*args != 1049)
1486 break;
1487 /* pass through */
1488 case 1048:
1489 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1490 break;
1491 default:
1492 /* case 2: DECANM -- ANSI/VT52 (NOT SUPPOURTED) */
1493 /* case 3: DECCOLM -- Column (NOT SUPPORTED) */
1494 /* case 4: DECSCLM -- Scroll (NOT SUPPORTED) */
1495 /* case 18: DECPFF -- Printer feed (NOT SUPPORTED) */
1496 /* case 19: DECPEX -- Printer extent (NOT SUPPORTED) */
1497 /* case 42: DECNRCM -- National characters (NOT SUPPORTED) */
1498 fprintf(stderr,
1499 "erresc: unknown private set/reset mode %d\n",
1500 *args);
1501 break;
1502 }
1503 } else {
1504 switch(*args) {
1505 case 0: /* Error (IGNORED) */
1506 break;
1507 case 2: /* KAM -- keyboard action */
1508 MODBIT(term.mode, set, MODE_KBDLOCK);
1509 break;
1510 case 4: /* IRM -- Insertion-replacement */
1511 MODBIT(term.mode, set, MODE_INSERT);
1512 break;
1513 case 12: /* XXX: SRM -- Send/Receive */
1514 break;
1515 case 20: /* LNM -- Linefeed/new line */
1516 MODBIT(term.mode, set, MODE_CRLF);
1517 break;
1518 default:
1519 fprintf(stderr,
1520 "erresc: unknown set/reset mode %d\n",
1521 *args);
1522 break;
1523 }
1524 }
1525 }
1526 }
1527 #undef MODBIT
1528
1529
1530 void
1531 csihandle(void) {
1532 switch(csiescseq.mode) {
1533 default:
1534 unknown:
1535 fprintf(stderr, "erresc: unknown csi ");
1536 csidump();
1537 /* die(""); */
1538 break;
1539 case '@': /* ICH -- Insert <n> blank char */
1540 DEFAULT(csiescseq.arg[0], 1);
1541 tinsertblank(csiescseq.arg[0]);
1542 break;
1543 case 'A': /* CUU -- Cursor <n> Up */
1544 case 'e':
1545 DEFAULT(csiescseq.arg[0], 1);
1546 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1547 break;
1548 case 'B': /* CUD -- Cursor <n> Down */
1549 DEFAULT(csiescseq.arg[0], 1);
1550 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1551 break;
1552 case 'c': /* DA -- Device Attributes */
1553 if(csiescseq.arg[0] == 0)
1554 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1555 break;
1556 case 'C': /* CUF -- Cursor <n> Forward */
1557 case 'a':
1558 DEFAULT(csiescseq.arg[0], 1);
1559 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1560 break;
1561 case 'D': /* CUB -- Cursor <n> Backward */
1562 DEFAULT(csiescseq.arg[0], 1);
1563 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1564 break;
1565 case 'E': /* CNL -- Cursor <n> Down and first col */
1566 DEFAULT(csiescseq.arg[0], 1);
1567 tmoveto(0, term.c.y+csiescseq.arg[0]);
1568 break;
1569 case 'F': /* CPL -- Cursor <n> Up and first col */
1570 DEFAULT(csiescseq.arg[0], 1);
1571 tmoveto(0, term.c.y-csiescseq.arg[0]);
1572 break;
1573 case 'g': /* TBC -- Tabulation clear */
1574 switch (csiescseq.arg[0]) {
1575 case 0: /* clear current tab stop */
1576 term.tabs[term.c.x] = 0;
1577 break;
1578 case 3: /* clear all the tabs */
1579 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1580 break;
1581 default:
1582 goto unknown;
1583 }
1584 break;
1585 case 'G': /* CHA -- Move to <col> */
1586 case '`': /* HPA */
1587 DEFAULT(csiescseq.arg[0], 1);
1588 tmoveto(csiescseq.arg[0]-1, term.c.y);
1589 break;
1590 case 'H': /* CUP -- Move to <row> <col> */
1591 case 'f': /* HVP */
1592 DEFAULT(csiescseq.arg[0], 1);
1593 DEFAULT(csiescseq.arg[1], 1);
1594 tmoveto(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1595 break;
1596 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1597 DEFAULT(csiescseq.arg[0], 1);
1598 while(csiescseq.arg[0]--)
1599 tputtab(1);
1600 break;
1601 case 'J': /* ED -- Clear screen */
1602 sel.bx = -1;
1603 switch(csiescseq.arg[0]) {
1604 case 0: /* below */
1605 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1606 if(term.c.y < term.row-1)
1607 tclearregion(0, term.c.y+1, term.col-1, term.row-1);
1608 break;
1609 case 1: /* above */
1610 if(term.c.y > 1)
1611 tclearregion(0, 0, term.col-1, term.c.y-1);
1612 tclearregion(0, term.c.y, term.c.x, term.c.y);
1613 break;
1614 case 2: /* all */
1615 tclearregion(0, 0, term.col-1, term.row-1);
1616 break;
1617 default:
1618 goto unknown;
1619 }
1620 break;
1621 case 'K': /* EL -- Clear line */
1622 switch(csiescseq.arg[0]) {
1623 case 0: /* right */
1624 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1625 break;
1626 case 1: /* left */
1627 tclearregion(0, term.c.y, term.c.x, term.c.y);
1628 break;
1629 case 2: /* all */
1630 tclearregion(0, term.c.y, term.col-1, term.c.y);
1631 break;
1632 }
1633 break;
1634 case 'S': /* SU -- Scroll <n> line up */
1635 DEFAULT(csiescseq.arg[0], 1);
1636 tscrollup(term.top, csiescseq.arg[0]);
1637 break;
1638 case 'T': /* SD -- Scroll <n> line down */
1639 DEFAULT(csiescseq.arg[0], 1);
1640 tscrolldown(term.top, csiescseq.arg[0]);
1641 break;
1642 case 'L': /* IL -- Insert <n> blank lines */
1643 DEFAULT(csiescseq.arg[0], 1);
1644 tinsertblankline(csiescseq.arg[0]);
1645 break;
1646 case 'l': /* RM -- Reset Mode */
1647 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
1648 break;
1649 case 'M': /* DL -- Delete <n> lines */
1650 DEFAULT(csiescseq.arg[0], 1);
1651 tdeleteline(csiescseq.arg[0]);
1652 break;
1653 case 'X': /* ECH -- Erase <n> char */
1654 DEFAULT(csiescseq.arg[0], 1);
1655 tclearregion(term.c.x, term.c.y, term.c.x + csiescseq.arg[0], term.c.y);
1656 break;
1657 case 'P': /* DCH -- Delete <n> char */
1658 DEFAULT(csiescseq.arg[0], 1);
1659 tdeletechar(csiescseq.arg[0]);
1660 break;
1661 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
1662 DEFAULT(csiescseq.arg[0], 1);
1663 while(csiescseq.arg[0]--)
1664 tputtab(0);
1665 break;
1666 case 'd': /* VPA -- Move to <row> */
1667 DEFAULT(csiescseq.arg[0], 1);
1668 tmoveto(term.c.x, csiescseq.arg[0]-1);
1669 break;
1670 case 'h': /* SM -- Set terminal mode */
1671 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
1672 break;
1673 case 'm': /* SGR -- Terminal attribute (color) */
1674 tsetattr(csiescseq.arg, csiescseq.narg);
1675 break;
1676 case 'r': /* DECSTBM -- Set Scrolling Region */
1677 if(csiescseq.priv) {
1678 goto unknown;
1679 } else {
1680 DEFAULT(csiescseq.arg[0], 1);
1681 DEFAULT(csiescseq.arg[1], term.row);
1682 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
1683 tmoveto(0, 0);
1684 }
1685 break;
1686 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1687 tcursor(CURSOR_SAVE);
1688 break;
1689 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1690 tcursor(CURSOR_LOAD);
1691 break;
1692 }
1693 }
1694
1695 void
1696 csidump(void) {
1697 int i;
1698 uint c;
1699
1700 printf("ESC[");
1701 for(i = 0; i < csiescseq.len; i++) {
1702 c = csiescseq.buf[i] & 0xff;
1703 if(isprint(c)) {
1704 putchar(c);
1705 } else if(c == '\n') {
1706 printf("(\\n)");
1707 } else if(c == '\r') {
1708 printf("(\\r)");
1709 } else if(c == 0x1b) {
1710 printf("(\\e)");
1711 } else {
1712 printf("(%02x)", c);
1713 }
1714 }
1715 putchar('\n');
1716 }
1717
1718 void
1719 csireset(void) {
1720 memset(&csiescseq, 0, sizeof(csiescseq));
1721 }
1722
1723 void
1724 strhandle(void) {
1725 char *p;
1726
1727 /*
1728 * TODO: make this being useful in case of color palette change.
1729 */
1730 strparse();
1731
1732 p = strescseq.buf;
1733
1734 switch(strescseq.type) {
1735 case ']': /* OSC -- Operating System Command */
1736 switch(p[0]) {
1737 case '0':
1738 case '1':
1739 case '2':
1740 /*
1741 * TODO: Handle special chars in string, like umlauts.
1742 */
1743 if(p[1] == ';') {
1744 XStoreName(xw.dpy, xw.win, strescseq.buf+2);
1745 }
1746 break;
1747 case ';':
1748 XStoreName(xw.dpy, xw.win, strescseq.buf+1);
1749 break;
1750 case '4': /* TODO: Set color (arg0) to "rgb:%hexr/$hexg/$hexb" (arg1) */
1751 break;
1752 default:
1753 fprintf(stderr, "erresc: unknown str ");
1754 strdump();
1755 break;
1756 }
1757 break;
1758 case 'k': /* old title set compatibility */
1759 XStoreName(xw.dpy, xw.win, strescseq.buf);
1760 break;
1761 case 'P': /* DSC -- Device Control String */
1762 case '_': /* APC -- Application Program Command */
1763 case '^': /* PM -- Privacy Message */
1764 default:
1765 fprintf(stderr, "erresc: unknown str ");
1766 strdump();
1767 /* die(""); */
1768 break;
1769 }
1770 }
1771
1772 void
1773 strparse(void) {
1774 /*
1775 * TODO: Implement parsing like for CSI when required.
1776 * Format: ESC type cmd ';' arg0 [';' argn] ESC \
1777 */
1778 return;
1779 }
1780
1781 void
1782 strdump(void) {
1783 int i;
1784 uint c;
1785
1786 printf("ESC%c", strescseq.type);
1787 for(i = 0; i < strescseq.len; i++) {
1788 c = strescseq.buf[i] & 0xff;
1789 if(isprint(c)) {
1790 putchar(c);
1791 } else if(c == '\n') {
1792 printf("(\\n)");
1793 } else if(c == '\r') {
1794 printf("(\\r)");
1795 } else if(c == 0x1b) {
1796 printf("(\\e)");
1797 } else {
1798 printf("(%02x)", c);
1799 }
1800 }
1801 printf("ESC\\\n");
1802 }
1803
1804 void
1805 strreset(void) {
1806 memset(&strescseq, 0, sizeof(strescseq));
1807 }
1808
1809 void
1810 tputtab(bool forward) {
1811 uint x = term.c.x;
1812
1813 if(forward) {
1814 if(x == term.col)
1815 return;
1816 for(++x; x < term.col && !term.tabs[x]; ++x)
1817 /* nothing */ ;
1818 } else {
1819 if(x == 0)
1820 return;
1821 for(--x; x > 0 && !term.tabs[x]; --x)
1822 /* nothing */ ;
1823 }
1824 tmoveto(x, term.c.y);
1825 }
1826
1827 void
1828 tputc(char *c, int len) {
1829 uchar ascii = *c;
1830 bool control = ascii < '\x20' || ascii == 0177;
1831
1832 if(iofd != -1) {
1833 if (xwrite(iofd, c, len) < 0) {
1834 fprintf(stderr, "Error writting in %s:%s\n",
1835 opt_io, strerror(errno));
1836 close(iofd);
1837 iofd = -1;
1838 }
1839 }
1840 /*
1841 * STR sequences must be checked before anything else
1842 * because it can use some control codes as part of the sequence.
1843 */
1844 if(term.esc & ESC_STR) {
1845 switch(ascii) {
1846 case '\033':
1847 term.esc = ESC_START | ESC_STR_END;
1848 break;
1849 case '\a': /* backwards compatibility to xterm */
1850 term.esc = 0;
1851 strhandle();
1852 break;
1853 default:
1854 strescseq.buf[strescseq.len++] = ascii;
1855 if(strescseq.len+1 >= STR_BUF_SIZ) {
1856 term.esc = 0;
1857 strhandle();
1858 }
1859 }
1860 return;
1861 }
1862
1863 /*
1864 * Actions of control codes must be performed as soon they arrive
1865 * because they can be embedded inside a control sequence, and
1866 * they must not cause conflicts with sequences.
1867 */
1868 if(control) {
1869 switch(ascii) {
1870 case '\t': /* HT */
1871 tputtab(1);
1872 return;
1873 case '\b': /* BS */
1874 tmoveto(term.c.x-1, term.c.y);
1875 return;
1876 case '\r': /* CR */
1877 tmoveto(0, term.c.y);
1878 return;
1879 case '\f': /* LF */
1880 case '\v': /* VT */
1881 case '\n': /* LF */
1882 /* go to first col if the mode is set */
1883 tnewline(IS_SET(MODE_CRLF));
1884 return;
1885 case '\a': /* BEL */
1886 if(!(xw.state & WIN_FOCUSED))
1887 xseturgency(1);
1888 return;
1889 case '\033': /* ESC */
1890 csireset();
1891 term.esc = ESC_START;
1892 return;
1893 case '\016': /* SO */
1894 term.c.attr.mode |= ATTR_GFX;
1895 return;
1896 case '\017': /* SI */
1897 term.c.attr.mode &= ~ATTR_GFX;
1898 return;
1899 case '\032': /* SUB */
1900 case '\030': /* CAN */
1901 csireset();
1902 return;
1903 case '\005': /* ENQ (IGNORED) */
1904 case '\000': /* NUL (IGNORED) */
1905 case '\021': /* XON (IGNORED) */
1906 case '\023': /* XOFF (IGNORED) */
1907 case 0177: /* DEL (IGNORED) */
1908 return;
1909 }
1910 } else if(term.esc & ESC_START) {
1911 if(term.esc & ESC_CSI) {
1912 csiescseq.buf[csiescseq.len++] = ascii;
1913 if(BETWEEN(ascii, 0x40, 0x7E)
1914 || csiescseq.len >= ESC_BUF_SIZ) {
1915 term.esc = 0;
1916 csiparse(), csihandle();
1917 }
1918 } else if(term.esc & ESC_STR_END) {
1919 term.esc = 0;
1920 if(ascii == '\\')
1921 strhandle();
1922 } else if(term.esc & ESC_ALTCHARSET) {
1923 switch(ascii) {
1924 case '0': /* Line drawing set */
1925 term.c.attr.mode |= ATTR_GFX;
1926 break;
1927 case 'B': /* USASCII */
1928 term.c.attr.mode &= ~ATTR_GFX;
1929 break;
1930 case 'A': /* UK (IGNORED) */
1931 case '<': /* multinational charset (IGNORED) */
1932 case '5': /* Finnish (IGNORED) */
1933 case 'C': /* Finnish (IGNORED) */
1934 case 'K': /* German (IGNORED) */
1935 break;
1936 default:
1937 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
1938 }
1939 term.esc = 0;
1940 } else if(term.esc & ESC_TEST) {
1941 if(ascii == '8') { /* DEC screen alignment test. */
1942 char E[UTF_SIZ] = "E";
1943 int x, y;
1944
1945 for(x = 0; x < term.col; ++x) {
1946 for(y = 0; y < term.row; ++y)
1947 tsetchar(E, &term.c.attr, x, y);
1948 }
1949 }
1950 term.esc = 0;
1951 } else {
1952 switch(ascii) {
1953 case '[':
1954 term.esc |= ESC_CSI;
1955 break;
1956 case '#':
1957 term.esc |= ESC_TEST;
1958 break;
1959 case 'P': /* DCS -- Device Control String */
1960 case '_': /* APC -- Application Program Command */
1961 case '^': /* PM -- Privacy Message */
1962 case ']': /* OSC -- Operating System Command */
1963 case 'k': /* old title set compatibility */
1964 strreset();
1965 strescseq.type = ascii;
1966 term.esc |= ESC_STR;
1967 break;
1968 case '(': /* set primary charset G0 */
1969 term.esc |= ESC_ALTCHARSET;
1970 break;
1971 case ')': /* set secondary charset G1 (IGNORED) */
1972 case '*': /* set tertiary charset G2 (IGNORED) */
1973 case '+': /* set quaternary charset G3 (IGNORED) */
1974 term.esc = 0;
1975 break;
1976 case 'D': /* IND -- Linefeed */
1977 if(term.c.y == term.bot) {
1978 tscrollup(term.top, 1);
1979 } else {
1980 tmoveto(term.c.x, term.c.y+1);
1981 }
1982 term.esc = 0;
1983 break;
1984 case 'E': /* NEL -- Next line */
1985 tnewline(1); /* always go to first col */
1986 term.esc = 0;
1987 break;
1988 case 'H': /* HTS -- Horizontal tab stop */
1989 term.tabs[term.c.x] = 1;
1990 term.esc = 0;
1991 break;
1992 case 'M': /* RI -- Reverse index */
1993 if(term.c.y == term.top) {
1994 tscrolldown(term.top, 1);
1995 } else {
1996 tmoveto(term.c.x, term.c.y-1);
1997 }
1998 term.esc = 0;
1999 break;
2000 case 'Z': /* DECID -- Identify Terminal */
2001 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2002 term.esc = 0;
2003 break;
2004 case 'c': /* RIS -- Reset to inital state */
2005 treset();
2006 term.esc = 0;
2007 xresettitle();
2008 break;
2009 case '=': /* DECPAM -- Application keypad */
2010 term.mode |= MODE_APPKEYPAD;
2011 term.esc = 0;
2012 break;
2013 case '>': /* DECPNM -- Normal keypad */
2014 term.mode &= ~MODE_APPKEYPAD;
2015 term.esc = 0;
2016 break;
2017 case '7': /* DECSC -- Save Cursor */
2018 tcursor(CURSOR_SAVE);
2019 term.esc = 0;
2020 break;
2021 case '8': /* DECRC -- Restore Cursor */
2022 tcursor(CURSOR_LOAD);
2023 term.esc = 0;
2024 break;
2025 case '\\': /* ST -- Stop */
2026 term.esc = 0;
2027 break;
2028 default:
2029 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2030 (uchar) ascii, isprint(ascii)? ascii:'.');
2031 term.esc = 0;
2032 }
2033 }
2034 /*
2035 * All characters which forms part of a sequence are not
2036 * printed
2037 */
2038 return;
2039 }
2040 /*
2041 * Display control codes only if we are in graphic mode
2042 */
2043 if(control && !(term.c.attr.mode & ATTR_GFX))
2044 return;
2045 if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
2046 sel.bx = -1;
2047 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
2048 tnewline(1); /* always go to first col */
2049 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2050 if(term.c.x+1 < term.col)
2051 tmoveto(term.c.x+1, term.c.y);
2052 else
2053 term.c.state |= CURSOR_WRAPNEXT;
2054 }
2055
2056 int
2057 tresize(int col, int row) {
2058 int i, x;
2059 int minrow = MIN(row, term.row);
2060 int mincol = MIN(col, term.col);
2061 int slide = term.c.y - row + 1;
2062 bool *bp;
2063
2064 if(col < 1 || row < 1)
2065 return 0;
2066
2067 /* free unneeded rows */
2068 i = 0;
2069 if(slide > 0) {
2070 /* slide screen to keep cursor where we expect it -
2071 * tscrollup would work here, but we can optimize to
2072 * memmove because we're freeing the earlier lines */
2073 for(/* i = 0 */; i < slide; i++) {
2074 free(term.line[i]);
2075 free(term.alt[i]);
2076 }
2077 memmove(term.line, term.line + slide, row * sizeof(Line));
2078 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2079 }
2080 for(i += row; i < term.row; i++) {
2081 free(term.line[i]);
2082 free(term.alt[i]);
2083 }
2084
2085 /* resize to new height */
2086 term.line = xrealloc(term.line, row * sizeof(Line));
2087 term.alt = xrealloc(term.alt, row * sizeof(Line));
2088 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2089 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2090
2091 /* resize each row to new width, zero-pad if needed */
2092 for(i = 0; i < minrow; i++) {
2093 term.dirty[i] = 1;
2094 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2095 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2096 for(x = mincol; x < col; x++) {
2097 term.line[i][x].state = 0;
2098 term.alt[i][x].state = 0;
2099 }
2100 }
2101
2102 /* allocate any new rows */
2103 for(/* i == minrow */; i < row; i++) {
2104 term.dirty[i] = 1;
2105 term.line[i] = xcalloc(col, sizeof(Glyph));
2106 term.alt [i] = xcalloc(col, sizeof(Glyph));
2107 }
2108 if(col > term.col) {
2109 bp = term.tabs + term.col;
2110
2111 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2112 while(--bp > term.tabs && !*bp)
2113 /* nothing */ ;
2114 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2115 *bp = 1;
2116 }
2117 /* update terminal size */
2118 term.col = col;
2119 term.row = row;
2120 /* make use of the LIMIT in tmoveto */
2121 tmoveto(term.c.x, term.c.y);
2122 /* reset scrolling region */
2123 tsetscroll(0, row-1);
2124
2125 return (slide > 0);
2126 }
2127
2128 void
2129 xresize(int col, int row) {
2130 xw.tw = MAX(1, 2*borderpx + col * xw.cw);
2131 xw.th = MAX(1, 2*borderpx + row * xw.ch);
2132
2133 XftDrawChange(xw.xft_draw, xw.buf);
2134 }
2135
2136 void
2137 xloadcols(void) {
2138 int i, r, g, b;
2139 XRenderColor xft_color = { .alpha = 0 };
2140
2141 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
2142 for(i = 0; i < LEN(colorname); i++) {
2143 if(!colorname[i])
2144 continue;
2145 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.xft_col[i])) {
2146 die("Could not allocate color '%s'\n", colorname[i]);
2147 }
2148 }
2149
2150 /* load colors [16-255] ; same colors as xterm */
2151 for(i = 16, r = 0; r < 6; r++) {
2152 for(g = 0; g < 6; g++) {
2153 for(b = 0; b < 6; b++) {
2154 xft_color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
2155 xft_color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
2156 xft_color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
2157 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &xft_color, &dc.xft_col[i])) {
2158 die("Could not allocate color %d\n", i);
2159 }
2160 i++;
2161 }
2162 }
2163 }
2164
2165 for(r = 0; r < 24; r++, i++) {
2166 xft_color.red = xft_color.green = xft_color.blue = 0x0808 + 0x0a0a * r;
2167 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &xft_color,
2168 &dc.xft_col[i])) {
2169 die("Could not allocate color %d\n", i);
2170 }
2171 }
2172 }
2173
2174 void
2175 xtermclear(int col1, int row1, int col2, int row2) {
2176 XftDrawRect(xw.xft_draw,
2177 &dc.xft_col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2178 borderpx + col1 * xw.cw,
2179 borderpx + row1 * xw.ch,
2180 (col2-col1+1) * xw.cw,
2181 (row2-row1+1) * xw.ch);
2182 }
2183
2184 /*
2185 * Absolute coordinates.
2186 */
2187 void
2188 xclear(int x1, int y1, int x2, int y2) {
2189 XftDrawRect(xw.xft_draw,
2190 &dc.xft_col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2191 x1, y1, x2-x1, y2-y1);
2192 }
2193
2194 void
2195 xhints(void) {
2196 XClassHint class = {opt_class ? opt_class : termname, termname};
2197 XWMHints wm = {.flags = InputHint, .input = 1};
2198 XSizeHints *sizeh = NULL;
2199
2200 sizeh = XAllocSizeHints();
2201 if(xw.isfixed == False) {
2202 sizeh->flags = PSize | PResizeInc | PBaseSize;
2203 sizeh->height = xw.h;
2204 sizeh->width = xw.w;
2205 sizeh->height_inc = xw.ch;
2206 sizeh->width_inc = xw.cw;
2207 sizeh->base_height = 2*borderpx;
2208 sizeh->base_width = 2*borderpx;
2209 } else {
2210 sizeh->flags = PMaxSize | PMinSize;
2211 sizeh->min_width = sizeh->max_width = xw.fw;
2212 sizeh->min_height = sizeh->max_height = xw.fh;
2213 }
2214
2215 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
2216 XFree(sizeh);
2217 }
2218
2219 int
2220 xloadfont(Font *f, FcPattern *pattern) {
2221 FcPattern *match;
2222 FcResult result;
2223
2224 match = XftFontMatch(xw.dpy, xw.scr, pattern, &result);
2225 if(!match)
2226 return 1;
2227 if(!(f->xft_set = XftFontOpenPattern(xw.dpy, match))) {
2228 FcPatternDestroy(match);
2229 return 1;
2230 }
2231
2232 f->ascent = f->xft_set->ascent;
2233 f->descent = f->xft_set->descent;
2234 f->lbearing = 0;
2235 f->rbearing = f->xft_set->max_advance_width;
2236
2237 f->height = f->xft_set->height;
2238 f->width = f->lbearing + f->rbearing;
2239
2240 return 0;
2241 }
2242
2243 void
2244 xloadfonts(char *fontstr, int fontsize) {
2245 FcPattern *pattern;
2246 FcResult result;
2247 double fontval;
2248
2249 if(fontstr[0] == '-') {
2250 pattern = XftXlfdParse(fontstr, False, False);
2251 } else {
2252 pattern = FcNameParse((FcChar8 *)fontstr);
2253 }
2254
2255 if(!pattern)
2256 die("st: can't open font %s\n", fontstr);
2257
2258 if(fontsize > 0) {
2259 FcPatternDel(pattern, FC_PIXEL_SIZE);
2260 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2261 usedfontsize = fontsize;
2262 } else {
2263 result = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2264 if(result == FcResultMatch) {
2265 usedfontsize = (int)fontval;
2266 } else {
2267 /*
2268 * Default font size is 12, if none given. This is to
2269 * have a known usedfontsize value.
2270 */
2271 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
2272 usedfontsize = 12;
2273 }
2274 }
2275
2276 if(xloadfont(&dc.font, pattern))
2277 die("st: can't open font %s\n", fontstr);
2278
2279 /* Setting character width and height. */
2280 xw.cw = dc.font.width;
2281 xw.ch = dc.font.height;
2282
2283 FcPatternDel(pattern, FC_WEIGHT);
2284 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
2285 if(xloadfont(&dc.bfont, pattern))
2286 die("st: can't open font %s\n", fontstr);
2287
2288 FcPatternDel(pattern, FC_SLANT);
2289 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
2290 if(xloadfont(&dc.ibfont, pattern))
2291 die("st: can't open font %s\n", fontstr);
2292
2293 FcPatternDel(pattern, FC_WEIGHT);
2294 if(xloadfont(&dc.ifont, pattern))
2295 die("st: can't open font %s\n", fontstr);
2296
2297 FcPatternDestroy(pattern);
2298 }
2299
2300 void
2301 xzoom(const Arg *arg)
2302 {
2303 xloadfonts(usedfont, usedfontsize + arg->i);
2304 cresize(0, 0);
2305 draw();
2306 }
2307
2308 void
2309 xinit(void) {
2310 XSetWindowAttributes attrs;
2311 Cursor cursor;
2312 Window parent;
2313 int sw, sh, major, minor;
2314
2315 if(!(xw.dpy = XOpenDisplay(NULL)))
2316 die("Can't open display\n");
2317 xw.scr = XDefaultScreen(xw.dpy);
2318 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
2319
2320 /* font */
2321 usedfont = (opt_font == NULL)? font : opt_font;
2322 xloadfonts(usedfont, 0);
2323
2324 /* colors */
2325 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
2326 xloadcols();
2327
2328 /* adjust fixed window geometry */
2329 if(xw.isfixed) {
2330 sw = DisplayWidth(xw.dpy, xw.scr);
2331 sh = DisplayHeight(xw.dpy, xw.scr);
2332 if(xw.fx < 0)
2333 xw.fx = sw + xw.fx - xw.fw - 1;
2334 if(xw.fy < 0)
2335 xw.fy = sh + xw.fy - xw.fh - 1;
2336
2337 xw.h = xw.fh;
2338 xw.w = xw.fw;
2339 } else {
2340 /* window - default size */
2341 xw.h = 2*borderpx + term.row * xw.ch;
2342 xw.w = 2*borderpx + term.col * xw.cw;
2343 xw.fx = 0;
2344 xw.fy = 0;
2345 }
2346
2347 attrs.background_pixel = dc.xft_col[defaultbg].pixel;
2348 attrs.border_pixel = dc.xft_col[defaultbg].pixel;
2349 attrs.bit_gravity = NorthWestGravity;
2350 attrs.event_mask = FocusChangeMask | KeyPressMask
2351 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
2352 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
2353 attrs.colormap = xw.cmap;
2354
2355 parent = opt_embed ? strtol(opt_embed, NULL, 0) : XRootWindow(xw.dpy, xw.scr);
2356 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
2357 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
2358 xw.vis,
2359 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
2360 | CWColormap,
2361 &attrs);
2362
2363 /* double buffering */
2364 if(!XdbeQueryExtension(xw.dpy, &major, &minor))
2365 die("Xdbe extension is not present\n");
2366 xw.buf = XdbeAllocateBackBufferName(xw.dpy, xw.win, XdbeCopied);
2367
2368 /* Xft rendering context */
2369 xw.xft_draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
2370
2371 /* input methods */
2372 xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL);
2373 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
2374 | XIMStatusNothing, XNClientWindow, xw.win,
2375 XNFocusWindow, xw.win, NULL);
2376 /* gc */
2377 dc.gc = XCreateGC(xw.dpy, xw.win, 0, NULL);
2378
2379 /* white cursor, black outline */
2380 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
2381 XDefineCursor(xw.dpy, xw.win, cursor);
2382 XRecolorCursor(xw.dpy, cursor,
2383 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
2384 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
2385
2386 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
2387 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
2388 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
2389
2390 xresettitle();
2391 XMapWindow(xw.dpy, xw.win);
2392 xhints();
2393 XSync(xw.dpy, 0);
2394 }
2395
2396 void
2397 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
2398 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
2399 width = charlen * xw.cw;
2400 Font *font = &dc.font;
2401 XGlyphInfo extents;
2402 XftColor *fg = &dc.xft_col[base.fg], *bg = &dc.xft_col[base.bg],
2403 *temp, revfg, revbg;
2404 XRenderColor colfg, colbg;
2405
2406 if(base.mode & ATTR_BOLD) {
2407 if(BETWEEN(base.fg, 0, 7)) {
2408 /* basic system colors */
2409 fg = &dc.xft_col[base.fg + 8];
2410 } else if(BETWEEN(base.fg, 16, 195)) {
2411 /* 256 colors */
2412 fg = &dc.xft_col[base.fg + 36];
2413 } else if(BETWEEN(base.fg, 232, 251)) {
2414 /* greyscale */
2415 fg = &dc.xft_col[base.fg + 4];
2416 }
2417 /*
2418 * Those ranges will not be brightened:
2419 * 8 - 15 – bright system colors
2420 * 196 - 231 – highest 256 color cube
2421 * 252 - 255 – brightest colors in greyscale
2422 */
2423 font = &dc.bfont;
2424 }
2425
2426 if(base.mode & ATTR_ITALIC)
2427 font = &dc.ifont;
2428 if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD))
2429 font = &dc.ibfont;
2430
2431 if(IS_SET(MODE_REVERSE)) {
2432 if(fg == &dc.xft_col[defaultfg]) {
2433 fg = &dc.xft_col[defaultbg];
2434 } else {
2435 colfg.red = ~fg->color.red;
2436 colfg.green = ~fg->color.green;
2437 colfg.blue = ~fg->color.blue;
2438 colfg.alpha = fg->color.alpha;
2439 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
2440 fg = &revfg;
2441 }
2442
2443 if(bg == &dc.xft_col[defaultbg]) {
2444 bg = &dc.xft_col[defaultfg];
2445 } else {
2446 colbg.red = ~bg->color.red;
2447 colbg.green = ~bg->color.green;
2448 colbg.blue = ~bg->color.blue;
2449 colbg.alpha = bg->color.alpha;
2450 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &revbg);
2451 bg = &revbg;
2452 }
2453 }
2454
2455 if(base.mode & ATTR_REVERSE)
2456 temp = fg, fg = bg, bg = temp;
2457
2458 XftTextExtentsUtf8(xw.dpy, font->xft_set, (FcChar8 *)s, bytelen,
2459 &extents);
2460 width = extents.xOff;
2461
2462 /* Intelligent cleaning up of the borders. */
2463 if(x == 0) {
2464 xclear(0, (y == 0)? 0 : winy, borderpx,
2465 winy + xw.ch + (y == term.row-1)? xw.h : 0);
2466 }
2467 if(x + charlen >= term.col-1) {
2468 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
2469 (y == term.row-1)? xw.h : (winy + xw.ch));
2470 }
2471 if(y == 0)
2472 xclear(winx, 0, winx + width, borderpx);
2473 if(y == term.row-1)
2474 xclear(winx, winy + xw.ch, winx + width, xw.h);
2475
2476 XftDrawRect(xw.xft_draw, bg, winx, winy, width, xw.ch);
2477 XftDrawStringUtf8(xw.xft_draw, fg, font->xft_set, winx,
2478 winy + font->ascent, (FcChar8 *)s, bytelen);
2479
2480 if(base.mode & ATTR_UNDERLINE) {
2481 XftDrawRect(xw.xft_draw, fg, winx, winy + font->ascent + 1,
2482 width, 1);
2483 }
2484 }
2485
2486 void
2487 xdrawcursor(void) {
2488 static int oldx = 0, oldy = 0;
2489 int sl;
2490 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs, 0};
2491
2492 LIMIT(oldx, 0, term.col-1);
2493 LIMIT(oldy, 0, term.row-1);
2494
2495 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
2496 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
2497
2498 /* remove the old cursor */
2499 if(term.line[oldy][oldx].state & GLYPH_SET) {
2500 sl = utf8size(term.line[oldy][oldx].c);
2501 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
2502 oldy, 1, sl);
2503 } else {
2504 xtermclear(oldx, oldy, oldx, oldy);
2505 }
2506
2507 /* draw the new one */
2508 if(!(IS_SET(MODE_HIDE))) {
2509 if(!(xw.state & WIN_FOCUSED))
2510 g.bg = defaultucs;
2511
2512 if(IS_SET(MODE_REVERSE))
2513 g.mode |= ATTR_REVERSE, g.fg = defaultcs, g.bg = defaultfg;
2514
2515 sl = utf8size(g.c);
2516 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
2517 oldx = term.c.x, oldy = term.c.y;
2518 }
2519 }
2520
2521 void
2522 xresettitle(void) {
2523 XStoreName(xw.dpy, xw.win, opt_title ? opt_title : "st");
2524 }
2525
2526 void
2527 redraw(void) {
2528 struct timespec tv = {0, REDRAW_TIMEOUT * 1000};
2529
2530 tfulldirt();
2531 draw();
2532 XSync(xw.dpy, False); /* necessary for a good tput flash */
2533 nanosleep(&tv, NULL);
2534 }
2535
2536 void
2537 draw(void) {
2538 XdbeSwapInfo swpinfo[1] = {{xw.win, XdbeCopied}};
2539
2540 drawregion(0, 0, term.col, term.row);
2541 XdbeSwapBuffers(xw.dpy, swpinfo, 1);
2542 }
2543
2544 void
2545 drawregion(int x1, int y1, int x2, int y2) {
2546 int ic, ib, x, y, ox, sl;
2547 Glyph base, new;
2548 char buf[DRAW_BUF_SIZ];
2549 bool ena_sel = sel.bx != -1, alt = IS_SET(MODE_ALTSCREEN);
2550
2551 if((sel.alt && !alt) || (!sel.alt && alt))
2552 ena_sel = 0;
2553 if(!(xw.state & WIN_VISIBLE))
2554 return;
2555
2556 for(y = y1; y < y2; y++) {
2557 if(!term.dirty[y])
2558 continue;
2559
2560 xtermclear(0, y, term.col, y);
2561 term.dirty[y] = 0;
2562 base = term.line[y][0];
2563 ic = ib = ox = 0;
2564 for(x = x1; x < x2; x++) {
2565 new = term.line[y][x];
2566 if(ena_sel && *(new.c) && selected(x, y))
2567 new.mode ^= ATTR_REVERSE;
2568 if(ib > 0 && (!(new.state & GLYPH_SET)
2569 || ATTRCMP(base, new)
2570 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
2571 xdraws(buf, base, ox, y, ic, ib);
2572 ic = ib = 0;
2573 }
2574 if(new.state & GLYPH_SET) {
2575 if(ib == 0) {
2576 ox = x;
2577 base = new;
2578 }
2579 sl = utf8size(new.c);
2580 memcpy(buf+ib, new.c, sl);
2581 ib += sl;
2582 ++ic;
2583 }
2584 }
2585 if(ib > 0)
2586 xdraws(buf, base, ox, y, ic, ib);
2587 }
2588 xdrawcursor();
2589 }
2590
2591 void
2592 expose(XEvent *ev) {
2593 XExposeEvent *e = &ev->xexpose;
2594
2595 if(xw.state & WIN_REDRAW) {
2596 if(!e->count)
2597 xw.state &= ~WIN_REDRAW;
2598 }
2599 }
2600
2601 void
2602 visibility(XEvent *ev) {
2603 XVisibilityEvent *e = &ev->xvisibility;
2604
2605 if(e->state == VisibilityFullyObscured) {
2606 xw.state &= ~WIN_VISIBLE;
2607 } else if(!(xw.state & WIN_VISIBLE)) {
2608 /* need a full redraw for next Expose, not just a buf copy */
2609 xw.state |= WIN_VISIBLE | WIN_REDRAW;
2610 }
2611 }
2612
2613 void
2614 unmap(XEvent *ev) {
2615 xw.state &= ~WIN_VISIBLE;
2616 }
2617
2618 void
2619 xseturgency(int add) {
2620 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
2621
2622 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
2623 XSetWMHints(xw.dpy, xw.win, h);
2624 XFree(h);
2625 }
2626
2627 void
2628 focus(XEvent *ev) {
2629 if(ev->type == FocusIn) {
2630 XSetICFocus(xw.xic);
2631 xw.state |= WIN_FOCUSED;
2632 xseturgency(0);
2633 } else {
2634 XUnsetICFocus(xw.xic);
2635 xw.state &= ~WIN_FOCUSED;
2636 }
2637 }
2638
2639 char*
2640 kmap(KeySym k, uint state) {
2641 int i;
2642 uint mask;
2643
2644 state &= ~Mod2Mask;
2645 for(i = 0; i < LEN(key); i++) {
2646 mask = key[i].mask;
2647
2648 if(key[i].k == k && ((state & mask) == mask
2649 || (mask == XK_NO_MOD && !state))) {
2650 return (char*)key[i].s;
2651 }
2652 }
2653 return NULL;
2654 }
2655
2656 void
2657 kpress(XEvent *ev) {
2658 XKeyEvent *e = &ev->xkey;
2659 KeySym ksym;
2660 char buf[32], *customkey;
2661 int len, meta, shift, i;
2662 Status status;
2663
2664 if (IS_SET(MODE_KBDLOCK))
2665 return;
2666
2667 meta = e->state & Mod1Mask;
2668 shift = e->state & ShiftMask;
2669 len = XmbLookupString(xw.xic, e, buf, sizeof(buf), &ksym, &status);
2670
2671 /* 1. shortcuts */
2672 for(i = 0; i < LEN(shortcuts); i++) {
2673 if((ksym == shortcuts[i].keysym)
2674 && (CLEANMASK(shortcuts[i].mod) == \
2675 CLEANMASK(e->state))
2676 && shortcuts[i].func) {
2677 shortcuts[i].func(&(shortcuts[i].arg));
2678 }
2679 }
2680
2681 /* 2. custom keys from config.h */
2682 if((customkey = kmap(ksym, e->state))) {
2683 ttywrite(customkey, strlen(customkey));
2684 /* 2. hardcoded (overrides X lookup) */
2685 } else {
2686 switch(ksym) {
2687 case XK_Up:
2688 case XK_Down:
2689 case XK_Left:
2690 case XK_Right:
2691 /* XXX: shift up/down doesn't work */
2692 sprintf(buf, "\033%c%c",
2693 IS_SET(MODE_APPKEYPAD) ? 'O' : '[',
2694 (shift ? "dacb":"DACB")[ksym - XK_Left]);
2695 ttywrite(buf, 3);
2696 break;
2697 case XK_Insert:
2698 if(shift)
2699 selpaste();
2700 break;
2701 case XK_Return:
2702 if(meta)
2703 ttywrite("\033", 1);
2704
2705 if(IS_SET(MODE_CRLF)) {
2706 ttywrite("\r\n", 2);
2707 } else {
2708 ttywrite("\r", 1);
2709 }
2710 break;
2711 /* 3. X lookup */
2712 default:
2713 if(len > 0) {
2714 if(meta && len == 1)
2715 ttywrite("\033", 1);
2716 ttywrite(buf, len);
2717 }
2718 break;
2719 }
2720 }
2721 }
2722
2723 void
2724 cmessage(XEvent *e) {
2725 /* See xembed specs
2726 http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html */
2727 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
2728 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
2729 xw.state |= WIN_FOCUSED;
2730 xseturgency(0);
2731 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
2732 xw.state &= ~WIN_FOCUSED;
2733 }
2734 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
2735 /* Send SIGHUP to shell */
2736 kill(pid, SIGHUP);
2737 exit(EXIT_SUCCESS);
2738 }
2739 }
2740
2741 void
2742 cresize(int width, int height)
2743 {
2744 int col, row;
2745
2746 if(width != 0)
2747 xw.w = width;
2748 if(height != 0)
2749 xw.h = height;
2750
2751 col = (xw.w - 2*borderpx) / xw.cw;
2752 row = (xw.h - 2*borderpx) / xw.ch;
2753
2754 tresize(col, row);
2755 xresize(col, row);
2756 ttyresize();
2757 }
2758
2759 void
2760 resize(XEvent *e) {
2761 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
2762 return;
2763
2764 cresize(e->xconfigure.width, e->xconfigure.height);
2765 }
2766
2767 void
2768 run(void) {
2769 XEvent ev;
2770 fd_set rfd;
2771 int xfd = XConnectionNumber(xw.dpy), i;
2772 struct timeval drawtimeout, *tv = NULL;
2773
2774 for(i = 0;; i++) {
2775 FD_ZERO(&rfd);
2776 FD_SET(cmdfd, &rfd);
2777 FD_SET(xfd, &rfd);
2778 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
2779 if(errno == EINTR)
2780 continue;
2781 die("select failed: %s\n", SERRNO);
2782 }
2783
2784 /*
2785 * Stop after a certain number of reads so the user does not
2786 * feel like the system is stuttering.
2787 */
2788 if(i < 1000 && FD_ISSET(cmdfd, &rfd)) {
2789 ttyread();
2790
2791 /*
2792 * Just wait a bit so it isn't disturbing the
2793 * user and the system is able to write something.
2794 */
2795 drawtimeout.tv_sec = 0;
2796 drawtimeout.tv_usec = 5;
2797 tv = &drawtimeout;
2798 continue;
2799 }
2800 i = 0;
2801 tv = NULL;
2802
2803 while(XPending(xw.dpy)) {
2804 XNextEvent(xw.dpy, &ev);
2805 if(XFilterEvent(&ev, None))
2806 continue;
2807 if(handler[ev.type])
2808 (handler[ev.type])(&ev);
2809 }
2810
2811 draw();
2812 XFlush(xw.dpy);
2813 }
2814 }
2815
2816 int
2817 main(int argc, char *argv[]) {
2818 int i, bitm, xr, yr;
2819 uint wr, hr;
2820
2821 xw.fw = xw.fh = xw.fx = xw.fy = 0;
2822 xw.isfixed = False;
2823
2824 for(i = 1; i < argc; i++) {
2825 switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
2826 case 'c':
2827 if(++i < argc)
2828 opt_class = argv[i];
2829 break;
2830 case 'e':
2831 /* eat every remaining arguments */
2832 if(++i < argc)
2833 opt_cmd = &argv[i];
2834 goto run;
2835 case 'f':
2836 if(++i < argc)
2837 opt_font = argv[i];
2838 break;
2839 case 'g':
2840 if(++i >= argc)
2841 break;
2842
2843 bitm = XParseGeometry(argv[i], &xr, &yr, &wr, &hr);
2844 if(bitm & XValue)
2845 xw.fx = xr;
2846 if(bitm & YValue)
2847 xw.fy = yr;
2848 if(bitm & WidthValue)
2849 xw.fw = (int)wr;
2850 if(bitm & HeightValue)
2851 xw.fh = (int)hr;
2852 if(bitm & XNegative && xw.fx == 0)
2853 xw.fx = -1;
2854 if(bitm & XNegative && xw.fy == 0)
2855 xw.fy = -1;
2856
2857 if(xw.fh != 0 && xw.fw != 0)
2858 xw.isfixed = True;
2859 break;
2860 case 'o':
2861 if(++i < argc)
2862 opt_io = argv[i];
2863 break;
2864 case 't':
2865 if(++i < argc)
2866 opt_title = argv[i];
2867 break;
2868 case 'v':
2869 default:
2870 die(USAGE);
2871 case 'w':
2872 if(++i < argc)
2873 opt_embed = argv[i];
2874 break;
2875 }
2876 }
2877
2878 run:
2879 setlocale(LC_CTYPE, "");
2880 XSetLocaleModifiers("");
2881 tnew(80, 24);
2882 xinit();
2883 ttynew();
2884 selinit();
2885 run();
2886 return 0;
2887 }
2888