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Add some comments about the other mouse reporting modes.
[st.git] / st.c
1 /* See LICENSE for licence details. */
2 #include <ctype.h>
3 #include <errno.h>
4 #include <fcntl.h>
5 #include <limits.h>
6 #include <locale.h>
7 #include <pwd.h>
8 #include <stdarg.h>
9 #include <stdbool.h>
10 #include <stdio.h>
11 #include <stdlib.h>
12 #include <string.h>
13 #include <signal.h>
14 #include <sys/ioctl.h>
15 #include <sys/select.h>
16 #include <sys/stat.h>
17 #include <sys/time.h>
18 #include <sys/types.h>
19 #include <sys/wait.h>
20 #include <time.h>
21 #include <unistd.h>
22 #include <X11/Xatom.h>
23 #include <X11/Xlib.h>
24 #include <X11/Xutil.h>
25 #include <X11/cursorfont.h>
26 #include <X11/keysym.h>
27 #include <X11/Xft/Xft.h>
28 #include <fontconfig/fontconfig.h>
29
30 #include "arg.h"
31
32 char *argv0;
33
34 #define Glyph Glyph_
35 #define Font Font_
36 #define Draw XftDraw *
37 #define Colour XftColor
38 #define Colourmap Colormap
39 #define Rectangle XRectangle
40
41 #if defined(__linux)
42 #include <pty.h>
43 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
44 #include <util.h>
45 #elif defined(__FreeBSD__) || defined(__DragonFly__)
46 #include <libutil.h>
47 #endif
48
49
50 /* XEMBED messages */
51 #define XEMBED_FOCUS_IN 4
52 #define XEMBED_FOCUS_OUT 5
53
54 /* Arbitrary sizes */
55 #define UTF_SIZ 4
56 #define ESC_BUF_SIZ (128*UTF_SIZ)
57 #define ESC_ARG_SIZ 16
58 #define STR_BUF_SIZ ESC_BUF_SIZ
59 #define STR_ARG_SIZ ESC_ARG_SIZ
60 #define DRAW_BUF_SIZ 20*1024
61 #define XK_ANY_MOD UINT_MAX
62 #define XK_NO_MOD 0
63 #define XK_SWITCH_MOD (1<<13)
64
65 #define REDRAW_TIMEOUT (80*1000) /* 80 ms */
66
67 /* macros */
68 #define SERRNO strerror(errno)
69 #define MIN(a, b) ((a) < (b) ? (a) : (b))
70 #define MAX(a, b) ((a) < (b) ? (b) : (a))
71 #define LEN(a) (sizeof(a) / sizeof(a[0]))
72 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
73 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
74 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
75 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
76 #define IS_SET(flag) ((term.mode & (flag)) != 0)
77 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_usec-t2.tv_usec)/1000)
78
79 #define VT102ID "\033[?6c"
80
81 enum glyph_attribute {
82 ATTR_NULL = 0,
83 ATTR_REVERSE = 1,
84 ATTR_UNDERLINE = 2,
85 ATTR_BOLD = 4,
86 ATTR_GFX = 8,
87 ATTR_ITALIC = 16,
88 ATTR_BLINK = 32,
89 ATTR_WRAP = 64,
90 };
91
92 enum cursor_movement {
93 CURSOR_SAVE,
94 CURSOR_LOAD
95 };
96
97 enum cursor_state {
98 CURSOR_DEFAULT = 0,
99 CURSOR_WRAPNEXT = 1,
100 CURSOR_ORIGIN = 2
101 };
102
103 enum term_mode {
104 MODE_WRAP = 1,
105 MODE_INSERT = 2,
106 MODE_APPKEYPAD = 4,
107 MODE_ALTSCREEN = 8,
108 MODE_CRLF = 16,
109 MODE_MOUSEBTN = 32,
110 MODE_MOUSEMOTION = 64,
111 MODE_MOUSE = 32|64,
112 MODE_REVERSE = 128,
113 MODE_KBDLOCK = 256,
114 MODE_HIDE = 512,
115 MODE_ECHO = 1024,
116 MODE_APPCURSOR = 2048,
117 MODE_MOUSESGR = 4096,
118 MODE_8BIT = 8192,
119 MODE_BLINK = 16384,
120 MODE_FBLINK = 32768,
121 MODE_FOCUS = 65536,
122 };
123
124 enum escape_state {
125 ESC_START = 1,
126 ESC_CSI = 2,
127 ESC_STR = 4, /* DSC, OSC, PM, APC */
128 ESC_ALTCHARSET = 8,
129 ESC_STR_END = 16, /* a final string was encountered */
130 ESC_TEST = 32, /* Enter in test mode */
131 };
132
133 enum window_state {
134 WIN_VISIBLE = 1,
135 WIN_REDRAW = 2,
136 WIN_FOCUSED = 4
137 };
138
139 enum selection_type {
140 SEL_REGULAR = 1,
141 SEL_RECTANGULAR = 2
142 };
143
144 enum selection_snap {
145 SNAP_WORD = 1,
146 SNAP_LINE = 2
147 };
148
149 /* bit macro */
150 #undef B0
151 enum { B0=1, B1=2, B2=4, B3=8, B4=16, B5=32, B6=64, B7=128 };
152
153 typedef unsigned char uchar;
154 typedef unsigned int uint;
155 typedef unsigned long ulong;
156 typedef unsigned short ushort;
157
158 typedef struct {
159 char c[UTF_SIZ]; /* character code */
160 uchar mode; /* attribute flags */
161 ushort fg; /* foreground */
162 ushort bg; /* background */
163 } Glyph;
164
165 typedef Glyph *Line;
166
167 typedef struct {
168 Glyph attr; /* current char attributes */
169 int x;
170 int y;
171 char state;
172 } TCursor;
173
174 /* CSI Escape sequence structs */
175 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
176 typedef struct {
177 char buf[ESC_BUF_SIZ]; /* raw string */
178 int len; /* raw string length */
179 char priv;
180 int arg[ESC_ARG_SIZ];
181 int narg; /* nb of args */
182 char mode;
183 } CSIEscape;
184
185 /* STR Escape sequence structs */
186 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
187 typedef struct {
188 char type; /* ESC type ... */
189 char buf[STR_BUF_SIZ]; /* raw string */
190 int len; /* raw string length */
191 char *args[STR_ARG_SIZ];
192 int narg; /* nb of args */
193 } STREscape;
194
195 /* Internal representation of the screen */
196 typedef struct {
197 int row; /* nb row */
198 int col; /* nb col */
199 Line *line; /* screen */
200 Line *alt; /* alternate screen */
201 bool *dirty; /* dirtyness of lines */
202 TCursor c; /* cursor */
203 int top; /* top scroll limit */
204 int bot; /* bottom scroll limit */
205 int mode; /* terminal mode flags */
206 int esc; /* escape state flags */
207 bool numlock; /* lock numbers in keyboard */
208 bool *tabs;
209 } Term;
210
211 /* Purely graphic info */
212 typedef struct {
213 Display *dpy;
214 Colourmap cmap;
215 Window win;
216 Drawable buf;
217 Atom xembed, wmdeletewin;
218 XIM xim;
219 XIC xic;
220 Draw draw;
221 Visual *vis;
222 int scr;
223 bool isfixed; /* is fixed geometry? */
224 int fx, fy, fw, fh; /* fixed geometry */
225 int tw, th; /* tty width and height */
226 int w, h; /* window width and height */
227 int ch; /* char height */
228 int cw; /* char width */
229 char state; /* focus, redraw, visible */
230 } XWindow;
231
232 typedef struct {
233 int b;
234 uint mask;
235 char s[ESC_BUF_SIZ];
236 } Mousekey;
237
238 typedef struct {
239 KeySym k;
240 uint mask;
241 char s[ESC_BUF_SIZ];
242 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
243 signed char appkey; /* application keypad */
244 signed char appcursor; /* application cursor */
245 signed char crlf; /* crlf mode */
246 } Key;
247
248 /* TODO: use better name for vars... */
249 typedef struct {
250 int mode;
251 int type;
252 int snap;
253 /*
254 * Selection variables:
255 * nb – normalized coordinates of the beginning of the selection
256 * ne – normalized coordinates of the end of the selection
257 * ob – original coordinates of the beginning of the selection
258 * oe – original coordinates of the end of the selection
259 */
260 struct {
261 int x, y;
262 } nb, ne, ob, oe;
263
264 char *clip;
265 Atom xtarget;
266 bool alt;
267 struct timeval tclick1;
268 struct timeval tclick2;
269 } Selection;
270
271 typedef union {
272 int i;
273 unsigned int ui;
274 float f;
275 const void *v;
276 } Arg;
277
278 typedef struct {
279 unsigned int mod;
280 KeySym keysym;
281 void (*func)(const Arg *);
282 const Arg arg;
283 } Shortcut;
284
285 /* function definitions used in config.h */
286 static void clippaste(const Arg *);
287 static void numlock(const Arg *);
288 static void selpaste(const Arg *);
289 static void xzoom(const Arg *);
290
291 /* Config.h for applying patches and the configuration. */
292 #include "config.h"
293
294 /* Font structure */
295 typedef struct {
296 int height;
297 int width;
298 int ascent;
299 int descent;
300 short lbearing;
301 short rbearing;
302 XftFont *match;
303 FcFontSet *set;
304 FcPattern *pattern;
305 } Font;
306
307 /* Drawing Context */
308 typedef struct {
309 Colour col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
310 Font font, bfont, ifont, ibfont;
311 GC gc;
312 } DC;
313
314 static void die(const char *, ...);
315 static void draw(void);
316 static void redraw(int);
317 static void drawregion(int, int, int, int);
318 static void execsh(void);
319 static void sigchld(int);
320 static void run(void);
321
322 static void csidump(void);
323 static void csihandle(void);
324 static void csiparse(void);
325 static void csireset(void);
326 static void strdump(void);
327 static void strhandle(void);
328 static void strparse(void);
329 static void strreset(void);
330
331 static int tattrset(int);
332 static void tclearregion(int, int, int, int);
333 static void tcursor(int);
334 static void tdeletechar(int);
335 static void tdeleteline(int);
336 static void tinsertblank(int);
337 static void tinsertblankline(int);
338 static void tmoveto(int, int);
339 static void tmoveato(int x, int y);
340 static void tnew(int, int);
341 static void tnewline(int);
342 static void tputtab(bool);
343 static void tputc(char *, int);
344 static void treset(void);
345 static int tresize(int, int);
346 static void tscrollup(int, int);
347 static void tscrolldown(int, int);
348 static void tsetattr(int*, int);
349 static void tsetchar(char *, Glyph *, int, int);
350 static void tsetscroll(int, int);
351 static void tswapscreen(void);
352 static void tsetdirt(int, int);
353 static void tsetdirtattr(int);
354 static void tsetmode(bool, bool, int *, int);
355 static void tfulldirt(void);
356 static void techo(char *, int);
357
358 static inline bool match(uint, uint);
359 static void ttynew(void);
360 static void ttyread(void);
361 static void ttyresize(void);
362 static void ttywrite(const char *, size_t);
363
364 static void xdraws(char *, Glyph, int, int, int, int);
365 static void xhints(void);
366 static void xclear(int, int, int, int);
367 static void xdrawcursor(void);
368 static void xinit(void);
369 static void xloadcols(void);
370 static int xsetcolorname(int, const char *);
371 static int xloadfont(Font *, FcPattern *);
372 static void xloadfonts(char *, int);
373 static int xloadfontset(Font *);
374 static void xsettitle(char *);
375 static void xresettitle(void);
376 static void xseturgency(int);
377 static void xsetsel(char*);
378 static void xtermclear(int, int, int, int);
379 static void xunloadfont(Font *f);
380 static void xunloadfonts(void);
381 static void xresize(int, int);
382
383 static void expose(XEvent *);
384 static void visibility(XEvent *);
385 static void unmap(XEvent *);
386 static char *kmap(KeySym, uint);
387 static void kpress(XEvent *);
388 static void cmessage(XEvent *);
389 static void cresize(int, int);
390 static void resize(XEvent *);
391 static void focus(XEvent *);
392 static void brelease(XEvent *);
393 static void bpress(XEvent *);
394 static void bmotion(XEvent *);
395 static void selnotify(XEvent *);
396 static void selclear(XEvent *);
397 static void selrequest(XEvent *);
398
399 static void selinit(void);
400 static void selsort(void);
401 static inline bool selected(int, int);
402 static void selcopy(void);
403 static void selscroll(int, int);
404 static void selsnap(int, int *, int *, int);
405
406 static int utf8decode(char *, long *);
407 static int utf8encode(long *, char *);
408 static int utf8size(char *);
409 static int isfullutf8(char *, int);
410
411 static ssize_t xwrite(int, char *, size_t);
412 static void *xmalloc(size_t);
413 static void *xrealloc(void *, size_t);
414 static void *xcalloc(size_t, size_t);
415
416 static void (*handler[LASTEvent])(XEvent *) = {
417 [KeyPress] = kpress,
418 [ClientMessage] = cmessage,
419 [ConfigureNotify] = resize,
420 [VisibilityNotify] = visibility,
421 [UnmapNotify] = unmap,
422 [Expose] = expose,
423 [FocusIn] = focus,
424 [FocusOut] = focus,
425 [MotionNotify] = bmotion,
426 [ButtonPress] = bpress,
427 [ButtonRelease] = brelease,
428 [SelectionClear] = selclear,
429 [SelectionNotify] = selnotify,
430 [SelectionRequest] = selrequest,
431 };
432
433 /* Globals */
434 static DC dc;
435 static XWindow xw;
436 static Term term;
437 static CSIEscape csiescseq;
438 static STREscape strescseq;
439 static int cmdfd;
440 static pid_t pid;
441 static Selection sel;
442 static int iofd = -1;
443 static char **opt_cmd = NULL;
444 static char *opt_io = NULL;
445 static char *opt_title = NULL;
446 static char *opt_embed = NULL;
447 static char *opt_class = NULL;
448 static char *opt_font = NULL;
449
450 static char *usedfont = NULL;
451 static int usedfontsize = 0;
452
453 /* Font Ring Cache */
454 enum {
455 FRC_NORMAL,
456 FRC_ITALIC,
457 FRC_BOLD,
458 FRC_ITALICBOLD
459 };
460
461 typedef struct {
462 XftFont *font;
463 long c;
464 int flags;
465 } Fontcache;
466
467 /*
468 * Fontcache is a ring buffer, with frccur as current position and frclen as
469 * the current length of used elements.
470 */
471
472 static Fontcache frc[1024];
473 static int frccur = -1, frclen = 0;
474
475 ssize_t
476 xwrite(int fd, char *s, size_t len) {
477 size_t aux = len;
478
479 while(len > 0) {
480 ssize_t r = write(fd, s, len);
481 if(r < 0)
482 return r;
483 len -= r;
484 s += r;
485 }
486 return aux;
487 }
488
489 void *
490 xmalloc(size_t len) {
491 void *p = malloc(len);
492
493 if(!p)
494 die("Out of memory\n");
495
496 return p;
497 }
498
499 void *
500 xrealloc(void *p, size_t len) {
501 if((p = realloc(p, len)) == NULL)
502 die("Out of memory\n");
503
504 return p;
505 }
506
507 void *
508 xcalloc(size_t nmemb, size_t size) {
509 void *p = calloc(nmemb, size);
510
511 if(!p)
512 die("Out of memory\n");
513
514 return p;
515 }
516
517 int
518 utf8decode(char *s, long *u) {
519 uchar c;
520 int i, n, rtn;
521
522 rtn = 1;
523 c = *s;
524 if(~c & B7) { /* 0xxxxxxx */
525 *u = c;
526 return rtn;
527 } else if((c & (B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */
528 *u = c&(B4|B3|B2|B1|B0);
529 n = 1;
530 } else if((c & (B7|B6|B5|B4)) == (B7|B6|B5)) { /* 1110xxxx */
531 *u = c&(B3|B2|B1|B0);
532 n = 2;
533 } else if((c & (B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) { /* 11110xxx */
534 *u = c & (B2|B1|B0);
535 n = 3;
536 } else {
537 goto invalid;
538 }
539
540 for(i = n, ++s; i > 0; --i, ++rtn, ++s) {
541 c = *s;
542 if((c & (B7|B6)) != B7) /* 10xxxxxx */
543 goto invalid;
544 *u <<= 6;
545 *u |= c & (B5|B4|B3|B2|B1|B0);
546 }
547
548 if((n == 1 && *u < 0x80) ||
549 (n == 2 && *u < 0x800) ||
550 (n == 3 && *u < 0x10000) ||
551 (*u >= 0xD800 && *u <= 0xDFFF)) {
552 goto invalid;
553 }
554
555 return rtn;
556 invalid:
557 *u = 0xFFFD;
558
559 return rtn;
560 }
561
562 int
563 utf8encode(long *u, char *s) {
564 uchar *sp;
565 ulong uc;
566 int i, n;
567
568 sp = (uchar *)s;
569 uc = *u;
570 if(uc < 0x80) {
571 *sp = uc; /* 0xxxxxxx */
572 return 1;
573 } else if(*u < 0x800) {
574 *sp = (uc >> 6) | (B7|B6); /* 110xxxxx */
575 n = 1;
576 } else if(uc < 0x10000) {
577 *sp = (uc >> 12) | (B7|B6|B5); /* 1110xxxx */
578 n = 2;
579 } else if(uc <= 0x10FFFF) {
580 *sp = (uc >> 18) | (B7|B6|B5|B4); /* 11110xxx */
581 n = 3;
582 } else {
583 goto invalid;
584 }
585
586 for(i=n,++sp; i>0; --i,++sp)
587 *sp = ((uc >> 6*(i-1)) & (B5|B4|B3|B2|B1|B0)) | B7; /* 10xxxxxx */
588
589 return n+1;
590 invalid:
591 /* U+FFFD */
592 *s++ = '\xEF';
593 *s++ = '\xBF';
594 *s = '\xBD';
595
596 return 3;
597 }
598
599 /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
600 UTF-8 otherwise return 0 */
601 int
602 isfullutf8(char *s, int b) {
603 uchar *c1, *c2, *c3;
604
605 c1 = (uchar *)s;
606 c2 = (uchar *)++s;
607 c3 = (uchar *)++s;
608 if(b < 1) {
609 return 0;
610 } else if((*c1&(B7|B6|B5)) == (B7|B6) && b == 1) {
611 return 0;
612 } else if((*c1&(B7|B6|B5|B4)) == (B7|B6|B5) &&
613 ((b == 1) ||
614 ((b == 2) && (*c2&(B7|B6)) == B7))) {
615 return 0;
616 } else if((*c1&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4) &&
617 ((b == 1) ||
618 ((b == 2) && (*c2&(B7|B6)) == B7) ||
619 ((b == 3) && (*c2&(B7|B6)) == B7 && (*c3&(B7|B6)) == B7))) {
620 return 0;
621 } else {
622 return 1;
623 }
624 }
625
626 int
627 utf8size(char *s) {
628 uchar c = *s;
629
630 if(~c&B7) {
631 return 1;
632 } else if((c&(B7|B6|B5)) == (B7|B6)) {
633 return 2;
634 } else if((c&(B7|B6|B5|B4)) == (B7|B6|B5)) {
635 return 3;
636 } else {
637 return 4;
638 }
639 }
640
641 static void
642 selinit(void) {
643 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
644 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
645 sel.mode = 0;
646 sel.ob.x = -1;
647 sel.clip = NULL;
648 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
649 if(sel.xtarget == None)
650 sel.xtarget = XA_STRING;
651 }
652
653 static int
654 x2col(int x) {
655 x -= borderpx;
656 x /= xw.cw;
657
658 return LIMIT(x, 0, term.col-1);
659 }
660
661 static int
662 y2row(int y) {
663 y -= borderpx;
664 y /= xw.ch;
665
666 return LIMIT(y, 0, term.row-1);
667 }
668
669 static void
670 selsort(void) {
671 if(sel.ob.y == sel.oe.y) {
672 sel.nb.x = MIN(sel.ob.x, sel.oe.x);
673 sel.ne.x = MAX(sel.ob.x, sel.oe.x);
674 } else {
675 sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
676 sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
677 }
678 sel.nb.y = MIN(sel.ob.y, sel.oe.y);
679 sel.ne.y = MAX(sel.ob.y, sel.oe.y);
680 }
681
682 static inline bool
683 selected(int x, int y) {
684 if(sel.ne.y == y && sel.nb.y == y)
685 return BETWEEN(x, sel.nb.x, sel.ne.x);
686
687 if(sel.type == SEL_RECTANGULAR) {
688 return ((sel.nb.y <= y && y <= sel.ne.y)
689 && (sel.nb.x <= x && x <= sel.ne.x));
690 }
691
692 return ((sel.nb.y < y && y < sel.ne.y)
693 || (y == sel.ne.y && x <= sel.ne.x))
694 || (y == sel.nb.y && x >= sel.nb.x
695 && (x <= sel.ne.x || sel.nb.y != sel.ne.y));
696 }
697
698 void
699 selsnap(int mode, int *x, int *y, int direction) {
700 int i;
701
702 switch(mode) {
703 case SNAP_WORD:
704 /*
705 * Snap around if the word wraps around at the end or
706 * beginning of a line.
707 */
708 for(;;) {
709 if(direction < 0 && *x <= 0) {
710 if(*y > 0 && term.line[*y - 1][term.col-1].mode
711 & ATTR_WRAP) {
712 *y -= 1;
713 *x = term.col-1;
714 } else {
715 break;
716 }
717 }
718 if(direction > 0 && *x >= term.col-1) {
719 if(*y < term.row-1 && term.line[*y][*x].mode
720 & ATTR_WRAP) {
721 *y += 1;
722 *x = 0;
723 } else {
724 break;
725 }
726 }
727
728 if(strchr(worddelimiters,
729 term.line[*y][*x + direction].c[0])) {
730 break;
731 }
732
733 *x += direction;
734 }
735 break;
736 case SNAP_LINE:
737 /*
738 * Snap around if the the previous line or the current one
739 * has set ATTR_WRAP at its end. Then the whole next or
740 * previous line will be selected.
741 */
742 *x = (direction < 0) ? 0 : term.col - 1;
743 if(direction < 0 && *y > 0) {
744 for(; *y > 0; *y += direction) {
745 if(!(term.line[*y-1][term.col-1].mode
746 & ATTR_WRAP)) {
747 break;
748 }
749 }
750 } else if(direction > 0 && *y < term.row-1) {
751 for(; *y < term.row; *y += direction) {
752 if(!(term.line[*y][term.col-1].mode
753 & ATTR_WRAP)) {
754 break;
755 }
756 }
757 }
758 break;
759 default:
760 /*
761 * Select the whole line when the end of line is reached.
762 */
763 if(direction > 0) {
764 i = term.col;
765 while(--i > 0 && term.line[*y][i].c[0] == ' ')
766 /* nothing */;
767 if(i > 0 && i < *x)
768 *x = term.col - 1;
769 }
770 break;
771 }
772 }
773
774 void
775 getbuttoninfo(XEvent *e) {
776 int type;
777 uint state = e->xbutton.state &~Button1Mask;
778
779 sel.alt = IS_SET(MODE_ALTSCREEN);
780
781 sel.oe.x = x2col(e->xbutton.x);
782 sel.oe.y = y2row(e->xbutton.y);
783
784 if(sel.ob.y < sel.oe.y
785 || (sel.ob.y == sel.oe.y && sel.ob.x < sel.oe.x)) {
786 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
787 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
788 } else {
789 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, -1);
790 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, +1);
791 }
792 selsort();
793
794 sel.type = SEL_REGULAR;
795 for(type = 1; type < LEN(selmasks); ++type) {
796 if(match(selmasks[type], state)) {
797 sel.type = type;
798 break;
799 }
800 }
801 }
802
803 void
804 mousereport(XEvent *e) {
805 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
806 button = e->xbutton.button, state = e->xbutton.state,
807 len;
808 char buf[40];
809 static int ob, ox, oy;
810
811 /* from urxvt */
812 if(e->xbutton.type == MotionNotify) {
813 if(!IS_SET(MODE_MOUSEMOTION) || (x == ox && y == oy))
814 return;
815 button = ob + 32;
816 ox = x;
817 oy = y;
818 } else if(!IS_SET(MODE_MOUSESGR)
819 && (e->xbutton.type == ButtonRelease
820 || button == AnyButton)) {
821 button = 3;
822 } else {
823 button -= Button1;
824 if(button >= 3)
825 button += 64 - 3;
826 if(e->xbutton.type == ButtonPress) {
827 ob = button;
828 ox = x;
829 oy = y;
830 }
831 }
832
833 button += (state & ShiftMask ? 4 : 0)
834 + (state & Mod4Mask ? 8 : 0)
835 + (state & ControlMask ? 16 : 0);
836
837 len = 0;
838 if(IS_SET(MODE_MOUSESGR)) {
839 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
840 button, x+1, y+1,
841 e->xbutton.type == ButtonRelease ? 'm' : 'M');
842 } else if(x < 223 && y < 223) {
843 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
844 32+button, 32+x+1, 32+y+1);
845 } else {
846 return;
847 }
848
849 ttywrite(buf, len);
850 }
851
852 void
853 bpress(XEvent *e) {
854 struct timeval now;
855 Mousekey *mk;
856
857 if(IS_SET(MODE_MOUSE)) {
858 mousereport(e);
859 return;
860 }
861
862 for(mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
863 if(e->xbutton.button == mk->b
864 && match(mk->mask, e->xbutton.state)) {
865 ttywrite(mk->s, strlen(mk->s));
866 if(IS_SET(MODE_ECHO))
867 techo(mk->s, strlen(mk->s));
868 return;
869 }
870 }
871
872 if(e->xbutton.button == Button1) {
873 gettimeofday(&now, NULL);
874
875 /* Clear previous selection, logically and visually. */
876 if(sel.ob.x != -1) {
877 sel.ob.x = -1;
878 tsetdirt(sel.nb.y, sel.ne.y);
879 draw();
880 }
881 sel.mode = 1;
882 sel.type = SEL_REGULAR;
883 sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
884 sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
885
886 /*
887 * If the user clicks below predefined timeouts specific
888 * snapping behaviour is exposed.
889 */
890 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
891 sel.snap = SNAP_LINE;
892 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
893 sel.snap = SNAP_WORD;
894 } else {
895 sel.snap = 0;
896 }
897 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
898 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
899 selsort();
900
901 /*
902 * Draw selection, unless it's regular and we don't want to
903 * make clicks visible
904 */
905 if(sel.snap != 0) {
906 sel.mode++;
907 tsetdirt(sel.nb.y, sel.ne.y);
908 draw();
909 }
910 sel.tclick2 = sel.tclick1;
911 sel.tclick1 = now;
912 }
913 }
914
915 void
916 selcopy(void) {
917 char *str, *ptr;
918 int x, y, bufsize, size, i, ex;
919 Glyph *gp, *last;
920
921 if(sel.ob.x == -1) {
922 str = NULL;
923 } else {
924 bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
925 ptr = str = xmalloc(bufsize);
926
927 /* append every set & selected glyph to the selection */
928 for(y = sel.nb.y; y < sel.ne.y + 1; y++) {
929 gp = &term.line[y][0];
930 last = gp + term.col;
931
932 while(--last >= gp && !(selected(last - gp, y) && \
933 strcmp(last->c, " ") != 0))
934 /* nothing */;
935
936 for(x = 0; gp <= last; x++, ++gp) {
937 if(!selected(x, y))
938 continue;
939
940 size = utf8size(gp->c);
941 memcpy(ptr, gp->c, size);
942 ptr += size;
943 }
944
945 /*
946 * Copy and pasting of line endings is inconsistent
947 * in the inconsistent terminal and GUI world.
948 * The best solution seems like to produce '\n' when
949 * something is copied from st and convert '\n' to
950 * '\r', when something to be pasted is received by
951 * st.
952 * FIXME: Fix the computer world.
953 */
954 if(y < sel.ne.y && !((gp-1)->mode & ATTR_WRAP))
955 *ptr++ = '\n';
956
957 /*
958 * If the last selected line expands in the selection
959 * after the visible text '\n' is appended.
960 */
961 if(y == sel.ne.y) {
962 i = term.col;
963 while(--i > 0 && term.line[y][i].c[0] == ' ')
964 /* nothing */;
965 ex = sel.ne.x;
966 if(sel.nb.y == sel.ne.y && sel.ne.x < sel.nb.x)
967 ex = sel.nb.x;
968 if(i < ex)
969 *ptr++ = '\n';
970 }
971 }
972 *ptr = 0;
973 }
974 xsetsel(str);
975 }
976
977 void
978 selnotify(XEvent *e) {
979 ulong nitems, ofs, rem;
980 int format;
981 uchar *data, *last, *repl;
982 Atom type;
983
984 ofs = 0;
985 do {
986 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
987 False, AnyPropertyType, &type, &format,
988 &nitems, &rem, &data)) {
989 fprintf(stderr, "Clipboard allocation failed\n");
990 return;
991 }
992
993 /*
994 * As seen in selcopy:
995 * Line endings are inconsistent in the terminal and GUI world
996 * copy and pasting. When receiving some selection data,
997 * replace all '\n' with '\r'.
998 * FIXME: Fix the computer world.
999 */
1000 repl = data;
1001 last = data + nitems * format / 8;
1002 while((repl = memchr(repl, '\n', last - repl))) {
1003 *repl++ = '\r';
1004 }
1005
1006 ttywrite((const char *)data, nitems * format / 8);
1007 XFree(data);
1008 /* number of 32-bit chunks returned */
1009 ofs += nitems * format / 32;
1010 } while(rem > 0);
1011 }
1012
1013 void
1014 selpaste(const Arg *dummy) {
1015 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
1016 xw.win, CurrentTime);
1017 }
1018
1019 void
1020 clippaste(const Arg *dummy) {
1021 Atom clipboard;
1022
1023 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1024 XConvertSelection(xw.dpy, clipboard, sel.xtarget, XA_PRIMARY,
1025 xw.win, CurrentTime);
1026 }
1027
1028 void
1029 selclear(XEvent *e) {
1030 if(sel.ob.x == -1)
1031 return;
1032 sel.ob.x = -1;
1033 tsetdirt(sel.nb.y, sel.ne.y);
1034 }
1035
1036 void
1037 selrequest(XEvent *e) {
1038 XSelectionRequestEvent *xsre;
1039 XSelectionEvent xev;
1040 Atom xa_targets, string;
1041
1042 xsre = (XSelectionRequestEvent *) e;
1043 xev.type = SelectionNotify;
1044 xev.requestor = xsre->requestor;
1045 xev.selection = xsre->selection;
1046 xev.target = xsre->target;
1047 xev.time = xsre->time;
1048 /* reject */
1049 xev.property = None;
1050
1051 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
1052 if(xsre->target == xa_targets) {
1053 /* respond with the supported type */
1054 string = sel.xtarget;
1055 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1056 XA_ATOM, 32, PropModeReplace,
1057 (uchar *) &string, 1);
1058 xev.property = xsre->property;
1059 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
1060 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1061 xsre->target, 8, PropModeReplace,
1062 (uchar *) sel.clip, strlen(sel.clip));
1063 xev.property = xsre->property;
1064 }
1065
1066 /* all done, send a notification to the listener */
1067 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
1068 fprintf(stderr, "Error sending SelectionNotify event\n");
1069 }
1070
1071 void
1072 xsetsel(char *str) {
1073 /* register the selection for both the clipboard and the primary */
1074 Atom clipboard;
1075
1076 free(sel.clip);
1077 sel.clip = str;
1078
1079 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
1080
1081 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1082 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
1083 }
1084
1085 void
1086 brelease(XEvent *e) {
1087 if(IS_SET(MODE_MOUSE)) {
1088 mousereport(e);
1089 return;
1090 }
1091
1092 if(e->xbutton.button == Button2) {
1093 selpaste(NULL);
1094 } else if(e->xbutton.button == Button1) {
1095 if(sel.mode < 2) {
1096 sel.ob.x = -1;
1097 } else {
1098 getbuttoninfo(e);
1099 selcopy();
1100 }
1101 sel.mode = 0;
1102 tsetdirt(sel.nb.y, sel.ne.y);
1103 }
1104 }
1105
1106 void
1107 bmotion(XEvent *e) {
1108 int oldey, oldex, oldsby, oldsey;
1109
1110 if(IS_SET(MODE_MOUSE)) {
1111 mousereport(e);
1112 return;
1113 }
1114
1115 if(!sel.mode)
1116 return;
1117
1118 sel.mode++;
1119 oldey = sel.oe.y;
1120 oldex = sel.oe.x;
1121 oldsby = sel.nb.y;
1122 oldsey = sel.ne.y;
1123 getbuttoninfo(e);
1124
1125 if(oldey != sel.oe.y || oldex != sel.oe.x)
1126 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
1127 }
1128
1129 void
1130 die(const char *errstr, ...) {
1131 va_list ap;
1132
1133 va_start(ap, errstr);
1134 vfprintf(stderr, errstr, ap);
1135 va_end(ap);
1136 exit(EXIT_FAILURE);
1137 }
1138
1139 void
1140 execsh(void) {
1141 char **args;
1142 char *envshell = getenv("SHELL");
1143 const struct passwd *pass = getpwuid(getuid());
1144 char buf[sizeof(long) * 8 + 1];
1145
1146 unsetenv("COLUMNS");
1147 unsetenv("LINES");
1148 unsetenv("TERMCAP");
1149
1150 if(pass) {
1151 setenv("LOGNAME", pass->pw_name, 1);
1152 setenv("USER", pass->pw_name, 1);
1153 setenv("SHELL", pass->pw_shell, 0);
1154 setenv("HOME", pass->pw_dir, 0);
1155 }
1156
1157 snprintf(buf, sizeof(buf), "%lu", xw.win);
1158 setenv("WINDOWID", buf, 1);
1159
1160 signal(SIGCHLD, SIG_DFL);
1161 signal(SIGHUP, SIG_DFL);
1162 signal(SIGINT, SIG_DFL);
1163 signal(SIGQUIT, SIG_DFL);
1164 signal(SIGTERM, SIG_DFL);
1165 signal(SIGALRM, SIG_DFL);
1166
1167 DEFAULT(envshell, shell);
1168 setenv("TERM", termname, 1);
1169 args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
1170 execvp(args[0], args);
1171 exit(EXIT_FAILURE);
1172 }
1173
1174 void
1175 sigchld(int a) {
1176 int stat = 0;
1177
1178 if(waitpid(pid, &stat, 0) < 0)
1179 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
1180
1181 if(WIFEXITED(stat)) {
1182 exit(WEXITSTATUS(stat));
1183 } else {
1184 exit(EXIT_FAILURE);
1185 }
1186 }
1187
1188 void
1189 ttynew(void) {
1190 int m, s;
1191 struct winsize w = {term.row, term.col, 0, 0};
1192
1193 /* seems to work fine on linux, openbsd and freebsd */
1194 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1195 die("openpty failed: %s\n", SERRNO);
1196
1197 switch(pid = fork()) {
1198 case -1:
1199 die("fork failed\n");
1200 break;
1201 case 0:
1202 setsid(); /* create a new process group */
1203 dup2(s, STDIN_FILENO);
1204 dup2(s, STDOUT_FILENO);
1205 dup2(s, STDERR_FILENO);
1206 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1207 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
1208 close(s);
1209 close(m);
1210 execsh();
1211 break;
1212 default:
1213 close(s);
1214 cmdfd = m;
1215 signal(SIGCHLD, sigchld);
1216 if(opt_io) {
1217 iofd = (!strcmp(opt_io, "-")) ?
1218 STDOUT_FILENO :
1219 open(opt_io, O_WRONLY | O_CREAT, 0666);
1220 if(iofd < 0) {
1221 fprintf(stderr, "Error opening %s:%s\n",
1222 opt_io, strerror(errno));
1223 }
1224 }
1225 }
1226 }
1227
1228 void
1229 dump(char c) {
1230 static int col;
1231
1232 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
1233 if(++col % 10 == 0)
1234 fprintf(stderr, "\n");
1235 }
1236
1237 void
1238 ttyread(void) {
1239 static char buf[BUFSIZ];
1240 static int buflen = 0;
1241 char *ptr;
1242 char s[UTF_SIZ];
1243 int charsize; /* size of utf8 char in bytes */
1244 long utf8c;
1245 int ret;
1246
1247 /* append read bytes to unprocessed bytes */
1248 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1249 die("Couldn't read from shell: %s\n", SERRNO);
1250
1251 /* process every complete utf8 char */
1252 buflen += ret;
1253 ptr = buf;
1254 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
1255 charsize = utf8decode(ptr, &utf8c);
1256 utf8encode(&utf8c, s);
1257 tputc(s, charsize);
1258 ptr += charsize;
1259 buflen -= charsize;
1260 }
1261
1262 /* keep any uncomplete utf8 char for the next call */
1263 memmove(buf, ptr, buflen);
1264 }
1265
1266 void
1267 ttywrite(const char *s, size_t n) {
1268 if(write(cmdfd, s, n) == -1)
1269 die("write error on tty: %s\n", SERRNO);
1270 }
1271
1272 void
1273 ttyresize(void) {
1274 struct winsize w;
1275
1276 w.ws_row = term.row;
1277 w.ws_col = term.col;
1278 w.ws_xpixel = xw.tw;
1279 w.ws_ypixel = xw.th;
1280 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1281 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
1282 }
1283
1284 int
1285 tattrset(int attr) {
1286 int i, j;
1287
1288 for(i = 0; i < term.row-1; i++) {
1289 for(j = 0; j < term.col-1; j++) {
1290 if(term.line[i][j].mode & attr)
1291 return 1;
1292 }
1293 }
1294
1295 return 0;
1296 }
1297
1298 void
1299 tsetdirt(int top, int bot) {
1300 int i;
1301
1302 LIMIT(top, 0, term.row-1);
1303 LIMIT(bot, 0, term.row-1);
1304
1305 for(i = top; i <= bot; i++)
1306 term.dirty[i] = 1;
1307 }
1308
1309 void
1310 tsetdirtattr(int attr) {
1311 int i, j;
1312
1313 for(i = 0; i < term.row-1; i++) {
1314 for(j = 0; j < term.col-1; j++) {
1315 if(term.line[i][j].mode & attr) {
1316 tsetdirt(i, i);
1317 break;
1318 }
1319 }
1320 }
1321 }
1322
1323 void
1324 tfulldirt(void) {
1325 tsetdirt(0, term.row-1);
1326 }
1327
1328 void
1329 tcursor(int mode) {
1330 static TCursor c;
1331
1332 if(mode == CURSOR_SAVE) {
1333 c = term.c;
1334 } else if(mode == CURSOR_LOAD) {
1335 term.c = c;
1336 tmoveto(c.x, c.y);
1337 }
1338 }
1339
1340 void
1341 treset(void) {
1342 uint i;
1343
1344 term.c = (TCursor){{
1345 .mode = ATTR_NULL,
1346 .fg = defaultfg,
1347 .bg = defaultbg
1348 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1349
1350 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1351 for(i = tabspaces; i < term.col; i += tabspaces)
1352 term.tabs[i] = 1;
1353 term.top = 0;
1354 term.bot = term.row - 1;
1355 term.mode = MODE_WRAP;
1356
1357 tclearregion(0, 0, term.col-1, term.row-1);
1358 tmoveto(0, 0);
1359 tcursor(CURSOR_SAVE);
1360 }
1361
1362 void
1363 tnew(int col, int row) {
1364 memset(&term, 0, sizeof(Term));
1365 tresize(col, row);
1366 term.numlock = 1;
1367
1368 treset();
1369 }
1370
1371 void
1372 tswapscreen(void) {
1373 Line *tmp = term.line;
1374
1375 term.line = term.alt;
1376 term.alt = tmp;
1377 term.mode ^= MODE_ALTSCREEN;
1378 tfulldirt();
1379 }
1380
1381 void
1382 tscrolldown(int orig, int n) {
1383 int i;
1384 Line temp;
1385
1386 LIMIT(n, 0, term.bot-orig+1);
1387
1388 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1389
1390 for(i = term.bot; i >= orig+n; i--) {
1391 temp = term.line[i];
1392 term.line[i] = term.line[i-n];
1393 term.line[i-n] = temp;
1394
1395 term.dirty[i] = 1;
1396 term.dirty[i-n] = 1;
1397 }
1398
1399 selscroll(orig, n);
1400 }
1401
1402 void
1403 tscrollup(int orig, int n) {
1404 int i;
1405 Line temp;
1406 LIMIT(n, 0, term.bot-orig+1);
1407
1408 tclearregion(0, orig, term.col-1, orig+n-1);
1409
1410 for(i = orig; i <= term.bot-n; i++) {
1411 temp = term.line[i];
1412 term.line[i] = term.line[i+n];
1413 term.line[i+n] = temp;
1414
1415 term.dirty[i] = 1;
1416 term.dirty[i+n] = 1;
1417 }
1418
1419 selscroll(orig, -n);
1420 }
1421
1422 void
1423 selscroll(int orig, int n) {
1424 if(sel.ob.x == -1)
1425 return;
1426
1427 if(BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
1428 if((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
1429 sel.ob.x = -1;
1430 return;
1431 }
1432 if(sel.type == SEL_RECTANGULAR) {
1433 if(sel.ob.y < term.top)
1434 sel.ob.y = term.top;
1435 if(sel.oe.y > term.bot)
1436 sel.oe.y = term.bot;
1437 } else {
1438 if(sel.ob.y < term.top) {
1439 sel.ob.y = term.top;
1440 sel.ob.x = 0;
1441 }
1442 if(sel.oe.y > term.bot) {
1443 sel.oe.y = term.bot;
1444 sel.oe.x = term.col;
1445 }
1446 }
1447 selsort();
1448 }
1449 }
1450
1451 void
1452 tnewline(int first_col) {
1453 int y = term.c.y;
1454
1455 if(y == term.bot) {
1456 tscrollup(term.top, 1);
1457 } else {
1458 y++;
1459 }
1460 tmoveto(first_col ? 0 : term.c.x, y);
1461 }
1462
1463 void
1464 csiparse(void) {
1465 char *p = csiescseq.buf, *np;
1466 long int v;
1467
1468 csiescseq.narg = 0;
1469 if(*p == '?') {
1470 csiescseq.priv = 1;
1471 p++;
1472 }
1473
1474 csiescseq.buf[csiescseq.len] = '\0';
1475 while(p < csiescseq.buf+csiescseq.len) {
1476 np = NULL;
1477 v = strtol(p, &np, 10);
1478 if(np == p)
1479 v = 0;
1480 if(v == LONG_MAX || v == LONG_MIN)
1481 v = -1;
1482 csiescseq.arg[csiescseq.narg++] = v;
1483 p = np;
1484 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1485 break;
1486 p++;
1487 }
1488 csiescseq.mode = *p;
1489 }
1490
1491 /* for absolute user moves, when decom is set */
1492 void
1493 tmoveato(int x, int y) {
1494 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1495 }
1496
1497 void
1498 tmoveto(int x, int y) {
1499 int miny, maxy;
1500
1501 if(term.c.state & CURSOR_ORIGIN) {
1502 miny = term.top;
1503 maxy = term.bot;
1504 } else {
1505 miny = 0;
1506 maxy = term.row - 1;
1507 }
1508 LIMIT(x, 0, term.col-1);
1509 LIMIT(y, miny, maxy);
1510 term.c.state &= ~CURSOR_WRAPNEXT;
1511 term.c.x = x;
1512 term.c.y = y;
1513 }
1514
1515 void
1516 tsetchar(char *c, Glyph *attr, int x, int y) {
1517 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1518 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1519 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1520 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1521 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1522 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1523 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1524 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1525 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1526 };
1527
1528 /*
1529 * The table is proudly stolen from rxvt.
1530 */
1531 if(attr->mode & ATTR_GFX) {
1532 if(c[0] >= 0x41 && c[0] <= 0x7e
1533 && vt100_0[c[0] - 0x41]) {
1534 c = vt100_0[c[0] - 0x41];
1535 }
1536 }
1537
1538 term.dirty[y] = 1;
1539 term.line[y][x] = *attr;
1540 memcpy(term.line[y][x].c, c, UTF_SIZ);
1541 }
1542
1543 void
1544 tclearregion(int x1, int y1, int x2, int y2) {
1545 int x, y, temp;
1546
1547 if(x1 > x2)
1548 temp = x1, x1 = x2, x2 = temp;
1549 if(y1 > y2)
1550 temp = y1, y1 = y2, y2 = temp;
1551
1552 LIMIT(x1, 0, term.col-1);
1553 LIMIT(x2, 0, term.col-1);
1554 LIMIT(y1, 0, term.row-1);
1555 LIMIT(y2, 0, term.row-1);
1556
1557 for(y = y1; y <= y2; y++) {
1558 term.dirty[y] = 1;
1559 for(x = x1; x <= x2; x++) {
1560 if(selected(x, y))
1561 selclear(NULL);
1562 term.line[y][x] = term.c.attr;
1563 memcpy(term.line[y][x].c, " ", 2);
1564 }
1565 }
1566 }
1567
1568 void
1569 tdeletechar(int n) {
1570 int src = term.c.x + n;
1571 int dst = term.c.x;
1572 int size = term.col - src;
1573
1574 term.dirty[term.c.y] = 1;
1575
1576 if(src >= term.col) {
1577 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1578 return;
1579 }
1580
1581 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1582 size * sizeof(Glyph));
1583 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1584 }
1585
1586 void
1587 tinsertblank(int n) {
1588 int src = term.c.x;
1589 int dst = src + n;
1590 int size = term.col - dst;
1591
1592 term.dirty[term.c.y] = 1;
1593
1594 if(dst >= term.col) {
1595 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1596 return;
1597 }
1598
1599 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1600 size * sizeof(Glyph));
1601 tclearregion(src, term.c.y, dst - 1, term.c.y);
1602 }
1603
1604 void
1605 tinsertblankline(int n) {
1606 if(term.c.y < term.top || term.c.y > term.bot)
1607 return;
1608
1609 tscrolldown(term.c.y, n);
1610 }
1611
1612 void
1613 tdeleteline(int n) {
1614 if(term.c.y < term.top || term.c.y > term.bot)
1615 return;
1616
1617 tscrollup(term.c.y, n);
1618 }
1619
1620 void
1621 tsetattr(int *attr, int l) {
1622 int i;
1623
1624 for(i = 0; i < l; i++) {
1625 switch(attr[i]) {
1626 case 0:
1627 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE \
1628 | ATTR_BOLD | ATTR_ITALIC \
1629 | ATTR_BLINK);
1630 term.c.attr.fg = defaultfg;
1631 term.c.attr.bg = defaultbg;
1632 break;
1633 case 1:
1634 term.c.attr.mode |= ATTR_BOLD;
1635 break;
1636 case 3:
1637 term.c.attr.mode |= ATTR_ITALIC;
1638 break;
1639 case 4:
1640 term.c.attr.mode |= ATTR_UNDERLINE;
1641 break;
1642 case 5: /* slow blink */
1643 case 6: /* rapid blink */
1644 term.c.attr.mode |= ATTR_BLINK;
1645 break;
1646 case 7:
1647 term.c.attr.mode |= ATTR_REVERSE;
1648 break;
1649 case 21:
1650 case 22:
1651 term.c.attr.mode &= ~ATTR_BOLD;
1652 break;
1653 case 23:
1654 term.c.attr.mode &= ~ATTR_ITALIC;
1655 break;
1656 case 24:
1657 term.c.attr.mode &= ~ATTR_UNDERLINE;
1658 break;
1659 case 25:
1660 case 26:
1661 term.c.attr.mode &= ~ATTR_BLINK;
1662 break;
1663 case 27:
1664 term.c.attr.mode &= ~ATTR_REVERSE;
1665 break;
1666 case 38:
1667 if(i + 2 < l && attr[i + 1] == 5) {
1668 i += 2;
1669 if(BETWEEN(attr[i], 0, 255)) {
1670 term.c.attr.fg = attr[i];
1671 } else {
1672 fprintf(stderr,
1673 "erresc: bad fgcolor %d\n",
1674 attr[i]);
1675 }
1676 } else {
1677 fprintf(stderr,
1678 "erresc(38): gfx attr %d unknown\n",
1679 attr[i]);
1680 }
1681 break;
1682 case 39:
1683 term.c.attr.fg = defaultfg;
1684 break;
1685 case 48:
1686 if(i + 2 < l && attr[i + 1] == 5) {
1687 i += 2;
1688 if(BETWEEN(attr[i], 0, 255)) {
1689 term.c.attr.bg = attr[i];
1690 } else {
1691 fprintf(stderr,
1692 "erresc: bad bgcolor %d\n",
1693 attr[i]);
1694 }
1695 } else {
1696 fprintf(stderr,
1697 "erresc(48): gfx attr %d unknown\n",
1698 attr[i]);
1699 }
1700 break;
1701 case 49:
1702 term.c.attr.bg = defaultbg;
1703 break;
1704 default:
1705 if(BETWEEN(attr[i], 30, 37)) {
1706 term.c.attr.fg = attr[i] - 30;
1707 } else if(BETWEEN(attr[i], 40, 47)) {
1708 term.c.attr.bg = attr[i] - 40;
1709 } else if(BETWEEN(attr[i], 90, 97)) {
1710 term.c.attr.fg = attr[i] - 90 + 8;
1711 } else if(BETWEEN(attr[i], 100, 107)) {
1712 term.c.attr.bg = attr[i] - 100 + 8;
1713 } else {
1714 fprintf(stderr,
1715 "erresc(default): gfx attr %d unknown\n",
1716 attr[i]), csidump();
1717 }
1718 break;
1719 }
1720 }
1721 }
1722
1723 void
1724 tsetscroll(int t, int b) {
1725 int temp;
1726
1727 LIMIT(t, 0, term.row-1);
1728 LIMIT(b, 0, term.row-1);
1729 if(t > b) {
1730 temp = t;
1731 t = b;
1732 b = temp;
1733 }
1734 term.top = t;
1735 term.bot = b;
1736 }
1737
1738 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1739
1740 void
1741 tsetmode(bool priv, bool set, int *args, int narg) {
1742 int *lim, mode;
1743 bool alt;
1744
1745 for(lim = args + narg; args < lim; ++args) {
1746 if(priv) {
1747 switch(*args) {
1748 break;
1749 case 1: /* DECCKM -- Cursor key */
1750 MODBIT(term.mode, set, MODE_APPCURSOR);
1751 break;
1752 case 5: /* DECSCNM -- Reverse video */
1753 mode = term.mode;
1754 MODBIT(term.mode, set, MODE_REVERSE);
1755 if(mode != term.mode)
1756 redraw(REDRAW_TIMEOUT);
1757 break;
1758 case 6: /* DECOM -- Origin */
1759 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1760 tmoveato(0, 0);
1761 break;
1762 case 7: /* DECAWM -- Auto wrap */
1763 MODBIT(term.mode, set, MODE_WRAP);
1764 break;
1765 case 0: /* Error (IGNORED) */
1766 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1767 case 3: /* DECCOLM -- Column (IGNORED) */
1768 case 4: /* DECSCLM -- Scroll (IGNORED) */
1769 case 8: /* DECARM -- Auto repeat (IGNORED) */
1770 case 18: /* DECPFF -- Printer feed (IGNORED) */
1771 case 19: /* DECPEX -- Printer extent (IGNORED) */
1772 case 42: /* DECNRCM -- National characters (IGNORED) */
1773 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1774 break;
1775 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1776 MODBIT(term.mode, !set, MODE_HIDE);
1777 break;
1778 case 1000: /* 1000,1002: enable xterm mouse report */
1779 MODBIT(term.mode, set, MODE_MOUSEBTN);
1780 MODBIT(term.mode, 0, MODE_MOUSEMOTION);
1781 break;
1782 case 1002:
1783 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1784 MODBIT(term.mode, 0, MODE_MOUSEBTN);
1785 break;
1786 case 1003: /* 1003: enable all mouse reports */
1787 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1788 MODBIT(term.mode, set, MODE_MOUSEBTN);
1789 break;
1790 case 1004:
1791 MODBIT(term.mode, set, MODE_FOCUS);
1792 break;
1793 case 1006:
1794 MODBIT(term.mode, set, MODE_MOUSESGR);
1795 break;
1796 case 1034:
1797 MODBIT(term.mode, set, MODE_8BIT);
1798 break;
1799 case 1049: /* = 1047 and 1048 */
1800 case 47:
1801 case 1047:
1802 if (!allowaltscreen)
1803 break;
1804
1805 alt = IS_SET(MODE_ALTSCREEN);
1806 if(alt) {
1807 tclearregion(0, 0, term.col-1,
1808 term.row-1);
1809 }
1810 if(set ^ alt) /* set is always 1 or 0 */
1811 tswapscreen();
1812 if(*args != 1049)
1813 break;
1814 /* FALLTRU */
1815 case 1048:
1816 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1817 break;
1818 /* Not implemented mouse modes. See comments there. */
1819 case 9: /* X10 compatibility mode */
1820 case 1001: /* mouse highlight mode; can hang the
1821 terminal by design when implemented. */
1822 case 1005: /* UTF-8 mouse mode; will confuse
1823 applications not supporting UTF-8
1824 and luit. */
1825 case 1015: /* urxvt mangled mouse mode; incompatible
1826 and can be mistaken for other control
1827 codes. */
1828 default:
1829 fprintf(stderr,
1830 "erresc: unknown private set/reset mode %d\n",
1831 *args);
1832 break;
1833 }
1834 } else {
1835 switch(*args) {
1836 case 0: /* Error (IGNORED) */
1837 break;
1838 case 2: /* KAM -- keyboard action */
1839 MODBIT(term.mode, set, MODE_KBDLOCK);
1840 break;
1841 case 4: /* IRM -- Insertion-replacement */
1842 MODBIT(term.mode, set, MODE_INSERT);
1843 break;
1844 case 12: /* SRM -- Send/Receive */
1845 MODBIT(term.mode, !set, MODE_ECHO);
1846 break;
1847 case 20: /* LNM -- Linefeed/new line */
1848 MODBIT(term.mode, set, MODE_CRLF);
1849 break;
1850 default:
1851 fprintf(stderr,
1852 "erresc: unknown set/reset mode %d\n",
1853 *args);
1854 break;
1855 }
1856 }
1857 }
1858 }
1859 #undef MODBIT
1860
1861
1862 void
1863 csihandle(void) {
1864 switch(csiescseq.mode) {
1865 default:
1866 unknown:
1867 fprintf(stderr, "erresc: unknown csi ");
1868 csidump();
1869 /* die(""); */
1870 break;
1871 case '@': /* ICH -- Insert <n> blank char */
1872 DEFAULT(csiescseq.arg[0], 1);
1873 tinsertblank(csiescseq.arg[0]);
1874 break;
1875 case 'A': /* CUU -- Cursor <n> Up */
1876 DEFAULT(csiescseq.arg[0], 1);
1877 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1878 break;
1879 case 'B': /* CUD -- Cursor <n> Down */
1880 case 'e': /* VPR --Cursor <n> Down */
1881 DEFAULT(csiescseq.arg[0], 1);
1882 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1883 break;
1884 case 'c': /* DA -- Device Attributes */
1885 if(csiescseq.arg[0] == 0)
1886 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1887 break;
1888 case 'C': /* CUF -- Cursor <n> Forward */
1889 case 'a': /* HPR -- Cursor <n> Forward */
1890 DEFAULT(csiescseq.arg[0], 1);
1891 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1892 break;
1893 case 'D': /* CUB -- Cursor <n> Backward */
1894 DEFAULT(csiescseq.arg[0], 1);
1895 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1896 break;
1897 case 'E': /* CNL -- Cursor <n> Down and first col */
1898 DEFAULT(csiescseq.arg[0], 1);
1899 tmoveto(0, term.c.y+csiescseq.arg[0]);
1900 break;
1901 case 'F': /* CPL -- Cursor <n> Up and first col */
1902 DEFAULT(csiescseq.arg[0], 1);
1903 tmoveto(0, term.c.y-csiescseq.arg[0]);
1904 break;
1905 case 'g': /* TBC -- Tabulation clear */
1906 switch(csiescseq.arg[0]) {
1907 case 0: /* clear current tab stop */
1908 term.tabs[term.c.x] = 0;
1909 break;
1910 case 3: /* clear all the tabs */
1911 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1912 break;
1913 default:
1914 goto unknown;
1915 }
1916 break;
1917 case 'G': /* CHA -- Move to <col> */
1918 case '`': /* HPA */
1919 DEFAULT(csiescseq.arg[0], 1);
1920 tmoveto(csiescseq.arg[0]-1, term.c.y);
1921 break;
1922 case 'H': /* CUP -- Move to <row> <col> */
1923 case 'f': /* HVP */
1924 DEFAULT(csiescseq.arg[0], 1);
1925 DEFAULT(csiescseq.arg[1], 1);
1926 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1927 break;
1928 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1929 DEFAULT(csiescseq.arg[0], 1);
1930 while(csiescseq.arg[0]--)
1931 tputtab(1);
1932 break;
1933 case 'J': /* ED -- Clear screen */
1934 sel.ob.x = -1;
1935 switch(csiescseq.arg[0]) {
1936 case 0: /* below */
1937 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1938 if(term.c.y < term.row-1) {
1939 tclearregion(0, term.c.y+1, term.col-1,
1940 term.row-1);
1941 }
1942 break;
1943 case 1: /* above */
1944 if(term.c.y > 1)
1945 tclearregion(0, 0, term.col-1, term.c.y-1);
1946 tclearregion(0, term.c.y, term.c.x, term.c.y);
1947 break;
1948 case 2: /* all */
1949 tclearregion(0, 0, term.col-1, term.row-1);
1950 break;
1951 default:
1952 goto unknown;
1953 }
1954 break;
1955 case 'K': /* EL -- Clear line */
1956 switch(csiescseq.arg[0]) {
1957 case 0: /* right */
1958 tclearregion(term.c.x, term.c.y, term.col-1,
1959 term.c.y);
1960 break;
1961 case 1: /* left */
1962 tclearregion(0, term.c.y, term.c.x, term.c.y);
1963 break;
1964 case 2: /* all */
1965 tclearregion(0, term.c.y, term.col-1, term.c.y);
1966 break;
1967 }
1968 break;
1969 case 'S': /* SU -- Scroll <n> line up */
1970 DEFAULT(csiescseq.arg[0], 1);
1971 tscrollup(term.top, csiescseq.arg[0]);
1972 break;
1973 case 'T': /* SD -- Scroll <n> line down */
1974 DEFAULT(csiescseq.arg[0], 1);
1975 tscrolldown(term.top, csiescseq.arg[0]);
1976 break;
1977 case 'L': /* IL -- Insert <n> blank lines */
1978 DEFAULT(csiescseq.arg[0], 1);
1979 tinsertblankline(csiescseq.arg[0]);
1980 break;
1981 case 'l': /* RM -- Reset Mode */
1982 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
1983 break;
1984 case 'M': /* DL -- Delete <n> lines */
1985 DEFAULT(csiescseq.arg[0], 1);
1986 tdeleteline(csiescseq.arg[0]);
1987 break;
1988 case 'X': /* ECH -- Erase <n> char */
1989 DEFAULT(csiescseq.arg[0], 1);
1990 tclearregion(term.c.x, term.c.y,
1991 term.c.x + csiescseq.arg[0] - 1, term.c.y);
1992 break;
1993 case 'P': /* DCH -- Delete <n> char */
1994 DEFAULT(csiescseq.arg[0], 1);
1995 tdeletechar(csiescseq.arg[0]);
1996 break;
1997 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
1998 DEFAULT(csiescseq.arg[0], 1);
1999 while(csiescseq.arg[0]--)
2000 tputtab(0);
2001 break;
2002 case 'd': /* VPA -- Move to <row> */
2003 DEFAULT(csiescseq.arg[0], 1);
2004 tmoveato(term.c.x, csiescseq.arg[0]-1);
2005 break;
2006 case 'h': /* SM -- Set terminal mode */
2007 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
2008 break;
2009 case 'm': /* SGR -- Terminal attribute (color) */
2010 tsetattr(csiescseq.arg, csiescseq.narg);
2011 break;
2012 case 'r': /* DECSTBM -- Set Scrolling Region */
2013 if(csiescseq.priv) {
2014 goto unknown;
2015 } else {
2016 DEFAULT(csiescseq.arg[0], 1);
2017 DEFAULT(csiescseq.arg[1], term.row);
2018 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
2019 tmoveato(0, 0);
2020 }
2021 break;
2022 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
2023 tcursor(CURSOR_SAVE);
2024 break;
2025 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
2026 tcursor(CURSOR_LOAD);
2027 break;
2028 }
2029 }
2030
2031 void
2032 csidump(void) {
2033 int i;
2034 uint c;
2035
2036 printf("ESC[");
2037 for(i = 0; i < csiescseq.len; i++) {
2038 c = csiescseq.buf[i] & 0xff;
2039 if(isprint(c)) {
2040 putchar(c);
2041 } else if(c == '\n') {
2042 printf("(\\n)");
2043 } else if(c == '\r') {
2044 printf("(\\r)");
2045 } else if(c == 0x1b) {
2046 printf("(\\e)");
2047 } else {
2048 printf("(%02x)", c);
2049 }
2050 }
2051 putchar('\n');
2052 }
2053
2054 void
2055 csireset(void) {
2056 memset(&csiescseq, 0, sizeof(csiescseq));
2057 }
2058
2059 void
2060 strhandle(void) {
2061 char *p = NULL;
2062 int i, j, narg;
2063
2064 strparse();
2065 narg = strescseq.narg;
2066
2067 switch(strescseq.type) {
2068 case ']': /* OSC -- Operating System Command */
2069 switch(i = atoi(strescseq.args[0])) {
2070 case 0:
2071 case 1:
2072 case 2:
2073 if(narg > 1)
2074 xsettitle(strescseq.args[1]);
2075 break;
2076 case 4: /* color set */
2077 if(narg < 3)
2078 break;
2079 p = strescseq.args[2];
2080 /* fall through */
2081 case 104: /* color reset, here p = NULL */
2082 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2083 if (!xsetcolorname(j, p)) {
2084 fprintf(stderr, "erresc: invalid color %s\n", p);
2085 } else {
2086 /*
2087 * TODO if defaultbg color is changed, borders
2088 * are dirty
2089 */
2090 redraw(0);
2091 }
2092 break;
2093 default:
2094 fprintf(stderr, "erresc: unknown str ");
2095 strdump();
2096 break;
2097 }
2098 break;
2099 case 'k': /* old title set compatibility */
2100 xsettitle(strescseq.args[0]);
2101 break;
2102 case 'P': /* DSC -- Device Control String */
2103 case '_': /* APC -- Application Program Command */
2104 case '^': /* PM -- Privacy Message */
2105 default:
2106 fprintf(stderr, "erresc: unknown str ");
2107 strdump();
2108 /* die(""); */
2109 break;
2110 }
2111 }
2112
2113 void
2114 strparse(void) {
2115 char *p = strescseq.buf;
2116
2117 strescseq.narg = 0;
2118 strescseq.buf[strescseq.len] = '\0';
2119 while(p && strescseq.narg < STR_ARG_SIZ)
2120 strescseq.args[strescseq.narg++] = strsep(&p, ";");
2121 }
2122
2123 void
2124 strdump(void) {
2125 int i;
2126 uint c;
2127
2128 printf("ESC%c", strescseq.type);
2129 for(i = 0; i < strescseq.len; i++) {
2130 c = strescseq.buf[i] & 0xff;
2131 if(c == '\0') {
2132 return;
2133 } else if(isprint(c)) {
2134 putchar(c);
2135 } else if(c == '\n') {
2136 printf("(\\n)");
2137 } else if(c == '\r') {
2138 printf("(\\r)");
2139 } else if(c == 0x1b) {
2140 printf("(\\e)");
2141 } else {
2142 printf("(%02x)", c);
2143 }
2144 }
2145 printf("ESC\\\n");
2146 }
2147
2148 void
2149 strreset(void) {
2150 memset(&strescseq, 0, sizeof(strescseq));
2151 }
2152
2153 void
2154 tputtab(bool forward) {
2155 uint x = term.c.x;
2156
2157 if(forward) {
2158 if(x == term.col)
2159 return;
2160 for(++x; x < term.col && !term.tabs[x]; ++x)
2161 /* nothing */ ;
2162 } else {
2163 if(x == 0)
2164 return;
2165 for(--x; x > 0 && !term.tabs[x]; --x)
2166 /* nothing */ ;
2167 }
2168 tmoveto(x, term.c.y);
2169 }
2170
2171 void
2172 techo(char *buf, int len) {
2173 for(; len > 0; buf++, len--) {
2174 char c = *buf;
2175
2176 if(c == '\033') { /* escape */
2177 tputc("^", 1);
2178 tputc("[", 1);
2179 } else if(c < '\x20') { /* control code */
2180 if(c != '\n' && c != '\r' && c != '\t') {
2181 c |= '\x40';
2182 tputc("^", 1);
2183 }
2184 tputc(&c, 1);
2185 } else {
2186 break;
2187 }
2188 }
2189 if(len)
2190 tputc(buf, len);
2191 }
2192
2193 void
2194 tputc(char *c, int len) {
2195 uchar ascii = *c;
2196 bool control = ascii < '\x20' || ascii == 0177;
2197
2198 if(iofd != -1) {
2199 if(xwrite(iofd, c, len) < 0) {
2200 fprintf(stderr, "Error writing in %s:%s\n",
2201 opt_io, strerror(errno));
2202 close(iofd);
2203 iofd = -1;
2204 }
2205 }
2206
2207 /*
2208 * STR sequences must be checked before anything else
2209 * because it can use some control codes as part of the sequence.
2210 */
2211 if(term.esc & ESC_STR) {
2212 switch(ascii) {
2213 case '\033':
2214 term.esc = ESC_START | ESC_STR_END;
2215 break;
2216 case '\a': /* backwards compatibility to xterm */
2217 term.esc = 0;
2218 strhandle();
2219 break;
2220 default:
2221 if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2222 memmove(&strescseq.buf[strescseq.len], c, len);
2223 strescseq.len += len;
2224 } else {
2225 /*
2226 * Here is a bug in terminals. If the user never sends
2227 * some code to stop the str or esc command, then st
2228 * will stop responding. But this is better than
2229 * silently failing with unknown characters. At least
2230 * then users will report back.
2231 *
2232 * In the case users ever get fixed, here is the code:
2233 */
2234 /*
2235 * term.esc = 0;
2236 * strhandle();
2237 */
2238 }
2239 }
2240 return;
2241 }
2242
2243 /*
2244 * Actions of control codes must be performed as soon they arrive
2245 * because they can be embedded inside a control sequence, and
2246 * they must not cause conflicts with sequences.
2247 */
2248 if(control) {
2249 switch(ascii) {
2250 case '\t': /* HT */
2251 tputtab(1);
2252 return;
2253 case '\b': /* BS */
2254 tmoveto(term.c.x-1, term.c.y);
2255 return;
2256 case '\r': /* CR */
2257 tmoveto(0, term.c.y);
2258 return;
2259 case '\f': /* LF */
2260 case '\v': /* VT */
2261 case '\n': /* LF */
2262 /* go to first col if the mode is set */
2263 tnewline(IS_SET(MODE_CRLF));
2264 return;
2265 case '\a': /* BEL */
2266 if(!(xw.state & WIN_FOCUSED))
2267 xseturgency(1);
2268 return;
2269 case '\033': /* ESC */
2270 csireset();
2271 term.esc = ESC_START;
2272 return;
2273 case '\016': /* SO */
2274 case '\017': /* SI */
2275 /*
2276 * Different charsets are hard to handle. Applications
2277 * should use the right alt charset escapes for the
2278 * only reason they still exist: line drawing. The
2279 * rest is incompatible history st should not support.
2280 */
2281 return;
2282 case '\032': /* SUB */
2283 case '\030': /* CAN */
2284 csireset();
2285 return;
2286 case '\005': /* ENQ (IGNORED) */
2287 case '\000': /* NUL (IGNORED) */
2288 case '\021': /* XON (IGNORED) */
2289 case '\023': /* XOFF (IGNORED) */
2290 case 0177: /* DEL (IGNORED) */
2291 return;
2292 }
2293 } else if(term.esc & ESC_START) {
2294 if(term.esc & ESC_CSI) {
2295 csiescseq.buf[csiescseq.len++] = ascii;
2296 if(BETWEEN(ascii, 0x40, 0x7E)
2297 || csiescseq.len >= \
2298 sizeof(csiescseq.buf)-1) {
2299 term.esc = 0;
2300 csiparse();
2301 csihandle();
2302 }
2303 } else if(term.esc & ESC_STR_END) {
2304 term.esc = 0;
2305 if(ascii == '\\')
2306 strhandle();
2307 } else if(term.esc & ESC_ALTCHARSET) {
2308 switch(ascii) {
2309 case '0': /* Line drawing set */
2310 term.c.attr.mode |= ATTR_GFX;
2311 break;
2312 case 'B': /* USASCII */
2313 term.c.attr.mode &= ~ATTR_GFX;
2314 break;
2315 case 'A': /* UK (IGNORED) */
2316 case '<': /* multinational charset (IGNORED) */
2317 case '5': /* Finnish (IGNORED) */
2318 case 'C': /* Finnish (IGNORED) */
2319 case 'K': /* German (IGNORED) */
2320 break;
2321 default:
2322 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2323 }
2324 term.esc = 0;
2325 } else if(term.esc & ESC_TEST) {
2326 if(ascii == '8') { /* DEC screen alignment test. */
2327 char E[UTF_SIZ] = "E";
2328 int x, y;
2329
2330 for(x = 0; x < term.col; ++x) {
2331 for(y = 0; y < term.row; ++y)
2332 tsetchar(E, &term.c.attr, x, y);
2333 }
2334 }
2335 term.esc = 0;
2336 } else {
2337 switch(ascii) {
2338 case '[':
2339 term.esc |= ESC_CSI;
2340 break;
2341 case '#':
2342 term.esc |= ESC_TEST;
2343 break;
2344 case 'P': /* DCS -- Device Control String */
2345 case '_': /* APC -- Application Program Command */
2346 case '^': /* PM -- Privacy Message */
2347 case ']': /* OSC -- Operating System Command */
2348 case 'k': /* old title set compatibility */
2349 strreset();
2350 strescseq.type = ascii;
2351 term.esc |= ESC_STR;
2352 break;
2353 case '(': /* set primary charset G0 */
2354 term.esc |= ESC_ALTCHARSET;
2355 break;
2356 case ')': /* set secondary charset G1 (IGNORED) */
2357 case '*': /* set tertiary charset G2 (IGNORED) */
2358 case '+': /* set quaternary charset G3 (IGNORED) */
2359 term.esc = 0;
2360 break;
2361 case 'D': /* IND -- Linefeed */
2362 if(term.c.y == term.bot) {
2363 tscrollup(term.top, 1);
2364 } else {
2365 tmoveto(term.c.x, term.c.y+1);
2366 }
2367 term.esc = 0;
2368 break;
2369 case 'E': /* NEL -- Next line */
2370 tnewline(1); /* always go to first col */
2371 term.esc = 0;
2372 break;
2373 case 'H': /* HTS -- Horizontal tab stop */
2374 term.tabs[term.c.x] = 1;
2375 term.esc = 0;
2376 break;
2377 case 'M': /* RI -- Reverse index */
2378 if(term.c.y == term.top) {
2379 tscrolldown(term.top, 1);
2380 } else {
2381 tmoveto(term.c.x, term.c.y-1);
2382 }
2383 term.esc = 0;
2384 break;
2385 case 'Z': /* DECID -- Identify Terminal */
2386 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2387 term.esc = 0;
2388 break;
2389 case 'c': /* RIS -- Reset to inital state */
2390 treset();
2391 term.esc = 0;
2392 xresettitle();
2393 break;
2394 case '=': /* DECPAM -- Application keypad */
2395 term.mode |= MODE_APPKEYPAD;
2396 term.esc = 0;
2397 break;
2398 case '>': /* DECPNM -- Normal keypad */
2399 term.mode &= ~MODE_APPKEYPAD;
2400 term.esc = 0;
2401 break;
2402 case '7': /* DECSC -- Save Cursor */
2403 tcursor(CURSOR_SAVE);
2404 term.esc = 0;
2405 break;
2406 case '8': /* DECRC -- Restore Cursor */
2407 tcursor(CURSOR_LOAD);
2408 term.esc = 0;
2409 break;
2410 case '\\': /* ST -- Stop */
2411 term.esc = 0;
2412 break;
2413 default:
2414 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2415 (uchar) ascii, isprint(ascii)? ascii:'.');
2416 term.esc = 0;
2417 }
2418 }
2419 /*
2420 * All characters which form part of a sequence are not
2421 * printed
2422 */
2423 return;
2424 }
2425 /*
2426 * Display control codes only if we are in graphic mode
2427 */
2428 if(control && !(term.c.attr.mode & ATTR_GFX))
2429 return;
2430 if(sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
2431 sel.ob.x = -1;
2432 if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2433 term.line[term.c.y][term.c.x].mode |= ATTR_WRAP;
2434 tnewline(1);
2435 }
2436
2437 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col) {
2438 memmove(&term.line[term.c.y][term.c.x+1],
2439 &term.line[term.c.y][term.c.x],
2440 (term.col - term.c.x - 1) * sizeof(Glyph));
2441 }
2442
2443 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2444 if(term.c.x+1 < term.col) {
2445 tmoveto(term.c.x+1, term.c.y);
2446 } else {
2447 term.c.state |= CURSOR_WRAPNEXT;
2448 }
2449 }
2450
2451 int
2452 tresize(int col, int row) {
2453 int i;
2454 int minrow = MIN(row, term.row);
2455 int mincol = MIN(col, term.col);
2456 int slide = term.c.y - row + 1;
2457 bool *bp;
2458 Line *orig;
2459
2460 if(col < 1 || row < 1)
2461 return 0;
2462
2463 /* free unneeded rows */
2464 i = 0;
2465 if(slide > 0) {
2466 /*
2467 * slide screen to keep cursor where we expect it -
2468 * tscrollup would work here, but we can optimize to
2469 * memmove because we're freeing the earlier lines
2470 */
2471 for(/* i = 0 */; i < slide; i++) {
2472 free(term.line[i]);
2473 free(term.alt[i]);
2474 }
2475 memmove(term.line, term.line + slide, row * sizeof(Line));
2476 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2477 }
2478 for(i += row; i < term.row; i++) {
2479 free(term.line[i]);
2480 free(term.alt[i]);
2481 }
2482
2483 /* resize to new height */
2484 term.line = xrealloc(term.line, row * sizeof(Line));
2485 term.alt = xrealloc(term.alt, row * sizeof(Line));
2486 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2487 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2488
2489 /* resize each row to new width, zero-pad if needed */
2490 for(i = 0; i < minrow; i++) {
2491 term.dirty[i] = 1;
2492 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2493 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2494 }
2495
2496 /* allocate any new rows */
2497 for(/* i == minrow */; i < row; i++) {
2498 term.dirty[i] = 1;
2499 term.line[i] = xcalloc(col, sizeof(Glyph));
2500 term.alt [i] = xcalloc(col, sizeof(Glyph));
2501 }
2502 if(col > term.col) {
2503 bp = term.tabs + term.col;
2504
2505 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2506 while(--bp > term.tabs && !*bp)
2507 /* nothing */ ;
2508 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2509 *bp = 1;
2510 }
2511 /* update terminal size */
2512 term.col = col;
2513 term.row = row;
2514 /* reset scrolling region */
2515 tsetscroll(0, row-1);
2516 /* make use of the LIMIT in tmoveto */
2517 tmoveto(term.c.x, term.c.y);
2518 /* Clearing both screens */
2519 orig = term.line;
2520 do {
2521 if(mincol < col && 0 < minrow) {
2522 tclearregion(mincol, 0, col - 1, minrow - 1);
2523 }
2524 if(0 < col && minrow < row) {
2525 tclearregion(0, minrow, col - 1, row - 1);
2526 }
2527 tswapscreen();
2528 } while(orig != term.line);
2529
2530 return (slide > 0);
2531 }
2532
2533 void
2534 xresize(int col, int row) {
2535 xw.tw = MAX(1, col * xw.cw);
2536 xw.th = MAX(1, row * xw.ch);
2537
2538 XFreePixmap(xw.dpy, xw.buf);
2539 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2540 DefaultDepth(xw.dpy, xw.scr));
2541 XftDrawChange(xw.draw, xw.buf);
2542 xclear(0, 0, xw.w, xw.h);
2543 }
2544
2545 static inline ushort
2546 sixd_to_16bit(int x) {
2547 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2548 }
2549
2550 void
2551 xloadcols(void) {
2552 int i, r, g, b;
2553 XRenderColor color = { .alpha = 0xffff };
2554
2555 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
2556 for(i = 0; i < LEN(colorname); i++) {
2557 if(!colorname[i])
2558 continue;
2559 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2560 die("Could not allocate color '%s'\n", colorname[i]);
2561 }
2562 }
2563
2564 /* load colors [16-255] ; same colors as xterm */
2565 for(i = 16, r = 0; r < 6; r++) {
2566 for(g = 0; g < 6; g++) {
2567 for(b = 0; b < 6; b++) {
2568 color.red = sixd_to_16bit(r);
2569 color.green = sixd_to_16bit(g);
2570 color.blue = sixd_to_16bit(b);
2571 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i])) {
2572 die("Could not allocate color %d\n", i);
2573 }
2574 i++;
2575 }
2576 }
2577 }
2578
2579 for(r = 0; r < 24; r++, i++) {
2580 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
2581 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color,
2582 &dc.col[i])) {
2583 die("Could not allocate color %d\n", i);
2584 }
2585 }
2586 }
2587
2588 int
2589 xsetcolorname(int x, const char *name) {
2590 XRenderColor color = { .alpha = 0xffff };
2591 Colour colour;
2592 if (x < 0 || x > LEN(colorname))
2593 return -1;
2594 if(!name) {
2595 if(16 <= x && x < 16 + 216) {
2596 int r = (x - 16) / 36, g = ((x - 16) % 36) / 6, b = (x - 16) % 6;
2597 color.red = sixd_to_16bit(r);
2598 color.green = sixd_to_16bit(g);
2599 color.blue = sixd_to_16bit(b);
2600 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2601 return 0; /* something went wrong */
2602 dc.col[x] = colour;
2603 return 1;
2604 } else if (16 + 216 <= x && x < 256) {
2605 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (x - (16 + 216));
2606 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2607 return 0; /* something went wrong */
2608 dc.col[x] = colour;
2609 return 1;
2610 } else {
2611 name = colorname[x];
2612 }
2613 }
2614 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &colour))
2615 return 0;
2616 dc.col[x] = colour;
2617 return 1;
2618 }
2619
2620 void
2621 xtermclear(int col1, int row1, int col2, int row2) {
2622 XftDrawRect(xw.draw,
2623 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2624 borderpx + col1 * xw.cw,
2625 borderpx + row1 * xw.ch,
2626 (col2-col1+1) * xw.cw,
2627 (row2-row1+1) * xw.ch);
2628 }
2629
2630 /*
2631 * Absolute coordinates.
2632 */
2633 void
2634 xclear(int x1, int y1, int x2, int y2) {
2635 XftDrawRect(xw.draw,
2636 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2637 x1, y1, x2-x1, y2-y1);
2638 }
2639
2640 void
2641 xhints(void) {
2642 XClassHint class = {opt_class ? opt_class : termname, termname};
2643 XWMHints wm = {.flags = InputHint, .input = 1};
2644 XSizeHints *sizeh = NULL;
2645
2646 sizeh = XAllocSizeHints();
2647 if(xw.isfixed == False) {
2648 sizeh->flags = PSize | PResizeInc | PBaseSize;
2649 sizeh->height = xw.h;
2650 sizeh->width = xw.w;
2651 sizeh->height_inc = xw.ch;
2652 sizeh->width_inc = xw.cw;
2653 sizeh->base_height = 2 * borderpx;
2654 sizeh->base_width = 2 * borderpx;
2655 } else {
2656 sizeh->flags = PMaxSize | PMinSize;
2657 sizeh->min_width = sizeh->max_width = xw.fw;
2658 sizeh->min_height = sizeh->max_height = xw.fh;
2659 }
2660
2661 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
2662 XFree(sizeh);
2663 }
2664
2665 int
2666 xloadfont(Font *f, FcPattern *pattern) {
2667 FcPattern *match;
2668 FcResult result;
2669
2670 match = FcFontMatch(NULL, pattern, &result);
2671 if(!match)
2672 return 1;
2673
2674 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2675 FcPatternDestroy(match);
2676 return 1;
2677 }
2678
2679 f->set = NULL;
2680 f->pattern = FcPatternDuplicate(pattern);
2681
2682 f->ascent = f->match->ascent;
2683 f->descent = f->match->descent;
2684 f->lbearing = 0;
2685 f->rbearing = f->match->max_advance_width;
2686
2687 f->height = f->ascent + f->descent;
2688 f->width = f->lbearing + f->rbearing;
2689
2690 return 0;
2691 }
2692
2693 void
2694 xloadfonts(char *fontstr, int fontsize) {
2695 FcPattern *pattern;
2696 FcResult result;
2697 double fontval;
2698
2699 if(fontstr[0] == '-') {
2700 pattern = XftXlfdParse(fontstr, False, False);
2701 } else {
2702 pattern = FcNameParse((FcChar8 *)fontstr);
2703 }
2704
2705 if(!pattern)
2706 die("st: can't open font %s\n", fontstr);
2707
2708 if(fontsize > 0) {
2709 FcPatternDel(pattern, FC_PIXEL_SIZE);
2710 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2711 usedfontsize = fontsize;
2712 } else {
2713 result = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2714 if(result == FcResultMatch) {
2715 usedfontsize = (int)fontval;
2716 } else {
2717 /*
2718 * Default font size is 12, if none given. This is to
2719 * have a known usedfontsize value.
2720 */
2721 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
2722 usedfontsize = 12;
2723 }
2724 }
2725
2726 FcConfigSubstitute(0, pattern, FcMatchPattern);
2727 FcDefaultSubstitute(pattern);
2728
2729 if(xloadfont(&dc.font, pattern))
2730 die("st: can't open font %s\n", fontstr);
2731
2732 /* Setting character width and height. */
2733 xw.cw = dc.font.width;
2734 xw.ch = dc.font.height;
2735
2736 FcPatternDel(pattern, FC_SLANT);
2737 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
2738 if(xloadfont(&dc.ifont, pattern))
2739 die("st: can't open font %s\n", fontstr);
2740
2741 FcPatternDel(pattern, FC_WEIGHT);
2742 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
2743 if(xloadfont(&dc.ibfont, pattern))
2744 die("st: can't open font %s\n", fontstr);
2745
2746 FcPatternDel(pattern, FC_SLANT);
2747 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
2748 if(xloadfont(&dc.bfont, pattern))
2749 die("st: can't open font %s\n", fontstr);
2750
2751 FcPatternDestroy(pattern);
2752 }
2753
2754 int
2755 xloadfontset(Font *f) {
2756 FcResult result;
2757
2758 if(!(f->set = FcFontSort(0, f->pattern, FcTrue, 0, &result)))
2759 return 1;
2760 return 0;
2761 }
2762
2763 void
2764 xunloadfont(Font *f) {
2765 XftFontClose(xw.dpy, f->match);
2766 FcPatternDestroy(f->pattern);
2767 if(f->set)
2768 FcFontSetDestroy(f->set);
2769 }
2770
2771 void
2772 xunloadfonts(void) {
2773 int i, ip;
2774
2775 /*
2776 * Free the loaded fonts in the font cache. This is done backwards
2777 * from the frccur.
2778 */
2779 for(i = 0, ip = frccur; i < frclen; i++, ip--) {
2780 if(ip < 0)
2781 ip = LEN(frc) - 1;
2782 XftFontClose(xw.dpy, frc[ip].font);
2783 }
2784 frccur = -1;
2785 frclen = 0;
2786
2787 xunloadfont(&dc.font);
2788 xunloadfont(&dc.bfont);
2789 xunloadfont(&dc.ifont);
2790 xunloadfont(&dc.ibfont);
2791 }
2792
2793 void
2794 xzoom(const Arg *arg) {
2795 xunloadfonts();
2796 xloadfonts(usedfont, usedfontsize + arg->i);
2797 cresize(0, 0);
2798 redraw(0);
2799 }
2800
2801 void
2802 xinit(void) {
2803 XSetWindowAttributes attrs;
2804 XGCValues gcvalues;
2805 Cursor cursor;
2806 Window parent;
2807 int sw, sh;
2808
2809 if(!(xw.dpy = XOpenDisplay(NULL)))
2810 die("Can't open display\n");
2811 xw.scr = XDefaultScreen(xw.dpy);
2812 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
2813
2814 /* font */
2815 if(!FcInit())
2816 die("Could not init fontconfig.\n");
2817
2818 usedfont = (opt_font == NULL)? font : opt_font;
2819 xloadfonts(usedfont, 0);
2820
2821 /* colors */
2822 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
2823 xloadcols();
2824
2825 /* adjust fixed window geometry */
2826 if(xw.isfixed) {
2827 sw = DisplayWidth(xw.dpy, xw.scr);
2828 sh = DisplayHeight(xw.dpy, xw.scr);
2829 if(xw.fx < 0)
2830 xw.fx = sw + xw.fx - xw.fw - 1;
2831 if(xw.fy < 0)
2832 xw.fy = sh + xw.fy - xw.fh - 1;
2833
2834 xw.h = xw.fh;
2835 xw.w = xw.fw;
2836 } else {
2837 /* window - default size */
2838 xw.h = 2 * borderpx + term.row * xw.ch;
2839 xw.w = 2 * borderpx + term.col * xw.cw;
2840 xw.fx = 0;
2841 xw.fy = 0;
2842 }
2843
2844 /* Events */
2845 attrs.background_pixel = dc.col[defaultbg].pixel;
2846 attrs.border_pixel = dc.col[defaultbg].pixel;
2847 attrs.bit_gravity = NorthWestGravity;
2848 attrs.event_mask = FocusChangeMask | KeyPressMask
2849 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
2850 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
2851 attrs.colormap = xw.cmap;
2852
2853 parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
2854 XRootWindow(xw.dpy, xw.scr);
2855 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
2856 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
2857 xw.vis,
2858 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
2859 | CWColormap,
2860 &attrs);
2861
2862 memset(&gcvalues, 0, sizeof(gcvalues));
2863 gcvalues.graphics_exposures = False;
2864 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
2865 &gcvalues);
2866 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2867 DefaultDepth(xw.dpy, xw.scr));
2868 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
2869 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
2870
2871 /* Xft rendering context */
2872 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
2873
2874 /* input methods */
2875 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2876 XSetLocaleModifiers("@im=local");
2877 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2878 XSetLocaleModifiers("@im=");
2879 if((xw.xim = XOpenIM(xw.dpy,
2880 NULL, NULL, NULL)) == NULL) {
2881 die("XOpenIM failed. Could not open input"
2882 " device.\n");
2883 }
2884 }
2885 }
2886 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
2887 | XIMStatusNothing, XNClientWindow, xw.win,
2888 XNFocusWindow, xw.win, NULL);
2889 if(xw.xic == NULL)
2890 die("XCreateIC failed. Could not obtain input method.\n");
2891
2892 /* white cursor, black outline */
2893 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
2894 XDefineCursor(xw.dpy, xw.win, cursor);
2895 XRecolorCursor(xw.dpy, cursor,
2896 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
2897 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
2898
2899 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
2900 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
2901 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
2902
2903 xresettitle();
2904 XMapWindow(xw.dpy, xw.win);
2905 xhints();
2906 XSync(xw.dpy, 0);
2907 }
2908
2909 void
2910 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
2911 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
2912 width = charlen * xw.cw, xp, i;
2913 int frp, frcflags;
2914 int u8fl, u8fblen, u8cblen, doesexist;
2915 char *u8c, *u8fs;
2916 long u8char;
2917 Font *font = &dc.font;
2918 FcResult fcres;
2919 FcPattern *fcpattern, *fontpattern;
2920 FcFontSet *fcsets[] = { NULL };
2921 FcCharSet *fccharset;
2922 Colour *fg, *bg, *temp, revfg, revbg;
2923 XRenderColor colfg, colbg;
2924 Rectangle r;
2925
2926 frcflags = FRC_NORMAL;
2927
2928 if(base.mode & ATTR_ITALIC) {
2929 if(base.fg == defaultfg)
2930 base.fg = defaultitalic;
2931 font = &dc.ifont;
2932 frcflags = FRC_ITALIC;
2933 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
2934 if(base.fg == defaultfg)
2935 base.fg = defaultitalic;
2936 font = &dc.ibfont;
2937 frcflags = FRC_ITALICBOLD;
2938 } else if(base.mode & ATTR_UNDERLINE) {
2939 if(base.fg == defaultfg)
2940 base.fg = defaultunderline;
2941 }
2942 fg = &dc.col[base.fg];
2943 bg = &dc.col[base.bg];
2944
2945 if(base.mode & ATTR_BOLD) {
2946 if(BETWEEN(base.fg, 0, 7)) {
2947 /* basic system colors */
2948 fg = &dc.col[base.fg + 8];
2949 } else if(BETWEEN(base.fg, 16, 195)) {
2950 /* 256 colors */
2951 fg = &dc.col[base.fg + 36];
2952 } else if(BETWEEN(base.fg, 232, 251)) {
2953 /* greyscale */
2954 fg = &dc.col[base.fg + 4];
2955 }
2956 /*
2957 * Those ranges will not be brightened:
2958 * 8 - 15 – bright system colors
2959 * 196 - 231 – highest 256 color cube
2960 * 252 - 255 – brightest colors in greyscale
2961 */
2962 font = &dc.bfont;
2963 frcflags = FRC_BOLD;
2964 }
2965
2966 if(IS_SET(MODE_REVERSE)) {
2967 if(fg == &dc.col[defaultfg]) {
2968 fg = &dc.col[defaultbg];
2969 } else {
2970 colfg.red = ~fg->color.red;
2971 colfg.green = ~fg->color.green;
2972 colfg.blue = ~fg->color.blue;
2973 colfg.alpha = fg->color.alpha;
2974 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
2975 fg = &revfg;
2976 }
2977
2978 if(bg == &dc.col[defaultbg]) {
2979 bg = &dc.col[defaultfg];
2980 } else {
2981 colbg.red = ~bg->color.red;
2982 colbg.green = ~bg->color.green;
2983 colbg.blue = ~bg->color.blue;
2984 colbg.alpha = bg->color.alpha;
2985 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &revbg);
2986 bg = &revbg;
2987 }
2988 }
2989
2990 if(base.mode & ATTR_REVERSE) {
2991 temp = fg;
2992 fg = bg;
2993 bg = temp;
2994 }
2995
2996 if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
2997 fg = bg;
2998
2999 /* Intelligent cleaning up of the borders. */
3000 if(x == 0) {
3001 xclear(0, (y == 0)? 0 : winy, borderpx,
3002 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
3003 }
3004 if(x + charlen >= term.col) {
3005 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
3006 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
3007 }
3008 if(y == 0)
3009 xclear(winx, 0, winx + width, borderpx);
3010 if(y == term.row-1)
3011 xclear(winx, winy + xw.ch, winx + width, xw.h);
3012
3013 /* Clean up the region we want to draw to. */
3014 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
3015
3016 /* Set the clip region because Xft is sometimes dirty. */
3017 r.x = 0;
3018 r.y = 0;
3019 r.height = xw.ch;
3020 r.width = width;
3021 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
3022
3023 for(xp = winx; bytelen > 0;) {
3024 /*
3025 * Search for the range in the to be printed string of glyphs
3026 * that are in the main font. Then print that range. If
3027 * some glyph is found that is not in the font, do the
3028 * fallback dance.
3029 */
3030 u8fs = s;
3031 u8fblen = 0;
3032 u8fl = 0;
3033 for(;;) {
3034 u8c = s;
3035 u8cblen = utf8decode(s, &u8char);
3036 s += u8cblen;
3037 bytelen -= u8cblen;
3038
3039 doesexist = XftCharIndex(xw.dpy, font->match, u8char);
3040 if(!doesexist || bytelen <= 0) {
3041 if(bytelen <= 0) {
3042 if(doesexist) {
3043 u8fl++;
3044 u8fblen += u8cblen;
3045 }
3046 }
3047
3048 if(u8fl > 0) {
3049 XftDrawStringUtf8(xw.draw, fg,
3050 font->match, xp,
3051 winy + font->ascent,
3052 (FcChar8 *)u8fs,
3053 u8fblen);
3054 xp += font->width * u8fl;
3055
3056 }
3057 break;
3058 }
3059
3060 u8fl++;
3061 u8fblen += u8cblen;
3062 }
3063 if(doesexist)
3064 break;
3065
3066 frp = frccur;
3067 /* Search the font cache. */
3068 for(i = 0; i < frclen; i++, frp--) {
3069 if(frp <= 0)
3070 frp = LEN(frc) - 1;
3071
3072 if(frc[frp].c == u8char
3073 && frc[frp].flags == frcflags) {
3074 break;
3075 }
3076 }
3077
3078 /* Nothing was found. */
3079 if(i >= frclen) {
3080 if(!font->set)
3081 xloadfontset(font);
3082 fcsets[0] = font->set;
3083
3084 /*
3085 * Nothing was found in the cache. Now use
3086 * some dozen of Fontconfig calls to get the
3087 * font for one single character.
3088 */
3089 fcpattern = FcPatternDuplicate(font->pattern);
3090 fccharset = FcCharSetCreate();
3091
3092 FcCharSetAddChar(fccharset, u8char);
3093 FcPatternAddCharSet(fcpattern, FC_CHARSET,
3094 fccharset);
3095 FcPatternAddBool(fcpattern, FC_SCALABLE,
3096 FcTrue);
3097
3098 FcConfigSubstitute(0, fcpattern,
3099 FcMatchPattern);
3100 FcDefaultSubstitute(fcpattern);
3101
3102 fontpattern = FcFontSetMatch(0, fcsets,
3103 FcTrue, fcpattern, &fcres);
3104
3105 /*
3106 * Overwrite or create the new cache entry.
3107 */
3108 frccur++;
3109 frclen++;
3110 if(frccur >= LEN(frc))
3111 frccur = 0;
3112 if(frclen > LEN(frc)) {
3113 frclen = LEN(frc);
3114 XftFontClose(xw.dpy, frc[frccur].font);
3115 }
3116
3117 frc[frccur].font = XftFontOpenPattern(xw.dpy,
3118 fontpattern);
3119 frc[frccur].c = u8char;
3120 frc[frccur].flags = frcflags;
3121
3122 FcPatternDestroy(fcpattern);
3123 FcCharSetDestroy(fccharset);
3124
3125 frp = frccur;
3126 }
3127
3128 XftDrawStringUtf8(xw.draw, fg, frc[frp].font,
3129 xp, winy + frc[frp].font->ascent,
3130 (FcChar8 *)u8c, u8cblen);
3131
3132 xp += font->width;
3133 }
3134
3135 /*
3136 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
3137 winy + font->ascent, (FcChar8 *)s, bytelen);
3138 */
3139
3140 if(base.mode & ATTR_UNDERLINE) {
3141 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
3142 width, 1);
3143 }
3144
3145 /* Reset clip to none. */
3146 XftDrawSetClip(xw.draw, 0);
3147 }
3148
3149 void
3150 xdrawcursor(void) {
3151 static int oldx = 0, oldy = 0;
3152 int sl;
3153 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
3154
3155 LIMIT(oldx, 0, term.col-1);
3156 LIMIT(oldy, 0, term.row-1);
3157
3158 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
3159
3160 /* remove the old cursor */
3161 sl = utf8size(term.line[oldy][oldx].c);
3162 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
3163 oldy, 1, sl);
3164
3165 /* draw the new one */
3166 if(!(IS_SET(MODE_HIDE))) {
3167 if(xw.state & WIN_FOCUSED) {
3168 if(IS_SET(MODE_REVERSE)) {
3169 g.mode |= ATTR_REVERSE;
3170 g.fg = defaultcs;
3171 g.bg = defaultfg;
3172 }
3173
3174 sl = utf8size(g.c);
3175 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
3176 } else {
3177 XftDrawRect(xw.draw, &dc.col[defaultcs],
3178 borderpx + term.c.x * xw.cw,
3179 borderpx + term.c.y * xw.ch,
3180 xw.cw - 1, 1);
3181 XftDrawRect(xw.draw, &dc.col[defaultcs],
3182 borderpx + term.c.x * xw.cw,
3183 borderpx + term.c.y * xw.ch,
3184 1, xw.ch - 1);
3185 XftDrawRect(xw.draw, &dc.col[defaultcs],
3186 borderpx + (term.c.x + 1) * xw.cw - 1,
3187 borderpx + term.c.y * xw.ch,
3188 1, xw.ch - 1);
3189 XftDrawRect(xw.draw, &dc.col[defaultcs],
3190 borderpx + term.c.x * xw.cw,
3191 borderpx + (term.c.y + 1) * xw.ch - 1,
3192 xw.cw, 1);
3193 }
3194 oldx = term.c.x, oldy = term.c.y;
3195 }
3196 }
3197
3198
3199 void
3200 xsettitle(char *p) {
3201 XTextProperty prop;
3202
3203 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3204 &prop);
3205 XSetWMName(xw.dpy, xw.win, &prop);
3206 }
3207
3208 void
3209 xresettitle(void) {
3210 xsettitle(opt_title ? opt_title : "st");
3211 }
3212
3213 void
3214 redraw(int timeout) {
3215 struct timespec tv = {0, timeout * 1000};
3216
3217 tfulldirt();
3218 draw();
3219
3220 if(timeout > 0) {
3221 nanosleep(&tv, NULL);
3222 XSync(xw.dpy, False); /* necessary for a good tput flash */
3223 }
3224 }
3225
3226 void
3227 draw(void) {
3228 drawregion(0, 0, term.col, term.row);
3229 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3230 xw.h, 0, 0);
3231 XSetForeground(xw.dpy, dc.gc,
3232 dc.col[IS_SET(MODE_REVERSE)?
3233 defaultfg : defaultbg].pixel);
3234 }
3235
3236 void
3237 drawregion(int x1, int y1, int x2, int y2) {
3238 int ic, ib, x, y, ox, sl;
3239 Glyph base, new;
3240 char buf[DRAW_BUF_SIZ];
3241 bool ena_sel = sel.ob.x != -1;
3242
3243 if(sel.alt ^ IS_SET(MODE_ALTSCREEN))
3244 ena_sel = 0;
3245
3246 if(!(xw.state & WIN_VISIBLE))
3247 return;
3248
3249 for(y = y1; y < y2; y++) {
3250 if(!term.dirty[y])
3251 continue;
3252
3253 xtermclear(0, y, term.col, y);
3254 term.dirty[y] = 0;
3255 base = term.line[y][0];
3256 ic = ib = ox = 0;
3257 for(x = x1; x < x2; x++) {
3258 new = term.line[y][x];
3259 if(ena_sel && selected(x, y))
3260 new.mode ^= ATTR_REVERSE;
3261 if(ib > 0 && (ATTRCMP(base, new)
3262 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3263 xdraws(buf, base, ox, y, ic, ib);
3264 ic = ib = 0;
3265 }
3266 if(ib == 0) {
3267 ox = x;
3268 base = new;
3269 }
3270
3271 sl = utf8size(new.c);
3272 memcpy(buf+ib, new.c, sl);
3273 ib += sl;
3274 ++ic;
3275 }
3276 if(ib > 0)
3277 xdraws(buf, base, ox, y, ic, ib);
3278 }
3279 xdrawcursor();
3280 }
3281
3282 void
3283 expose(XEvent *ev) {
3284 XExposeEvent *e = &ev->xexpose;
3285
3286 if(xw.state & WIN_REDRAW) {
3287 if(!e->count)
3288 xw.state &= ~WIN_REDRAW;
3289 }
3290 redraw(0);
3291 }
3292
3293 void
3294 visibility(XEvent *ev) {
3295 XVisibilityEvent *e = &ev->xvisibility;
3296
3297 if(e->state == VisibilityFullyObscured) {
3298 xw.state &= ~WIN_VISIBLE;
3299 } else if(!(xw.state & WIN_VISIBLE)) {
3300 /* need a full redraw for next Expose, not just a buf copy */
3301 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3302 }
3303 }
3304
3305 void
3306 unmap(XEvent *ev) {
3307 xw.state &= ~WIN_VISIBLE;
3308 }
3309
3310 void
3311 xseturgency(int add) {
3312 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3313
3314 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
3315 XSetWMHints(xw.dpy, xw.win, h);
3316 XFree(h);
3317 }
3318
3319 void
3320 focus(XEvent *ev) {
3321 XFocusChangeEvent *e = &ev->xfocus;
3322
3323 if(e->mode == NotifyGrab)
3324 return;
3325
3326 if(ev->type == FocusIn) {
3327 XSetICFocus(xw.xic);
3328 xw.state |= WIN_FOCUSED;
3329 xseturgency(0);
3330 if(IS_SET(MODE_FOCUS))
3331 ttywrite("\033[I", 3);
3332 } else {
3333 XUnsetICFocus(xw.xic);
3334 xw.state &= ~WIN_FOCUSED;
3335 if(IS_SET(MODE_FOCUS))
3336 ttywrite("\033[O", 3);
3337 }
3338 }
3339
3340 inline bool
3341 match(uint mask, uint state) {
3342 state &= ~(ignoremod);
3343
3344 if(mask == XK_NO_MOD && state)
3345 return false;
3346 if(mask != XK_ANY_MOD && mask != XK_NO_MOD && !state)
3347 return false;
3348 if((state & mask) != state)
3349 return false;
3350 return true;
3351 }
3352
3353 void
3354 numlock(const Arg *dummy) {
3355 term.numlock ^= 1;
3356 }
3357
3358 char*
3359 kmap(KeySym k, uint state) {
3360 uint mask;
3361 Key *kp;
3362 int i;
3363
3364 /* Check for mapped keys out of X11 function keys. */
3365 for(i = 0; i < LEN(mappedkeys); i++) {
3366 if(mappedkeys[i] == k)
3367 break;
3368 }
3369 if(i == LEN(mappedkeys)) {
3370 if((k & 0xFFFF) < 0xFD00)
3371 return NULL;
3372 }
3373
3374 for(kp = key; kp < key + LEN(key); kp++) {
3375 mask = kp->mask;
3376
3377 if(kp->k != k)
3378 continue;
3379
3380 if(!match(mask, state))
3381 continue;
3382
3383 if(kp->appkey > 0) {
3384 if(!IS_SET(MODE_APPKEYPAD))
3385 continue;
3386 if(term.numlock && kp->appkey == 2)
3387 continue;
3388 } else if(kp->appkey < 0 && IS_SET(MODE_APPKEYPAD)) {
3389 continue;
3390 }
3391
3392 if((kp->appcursor < 0 && IS_SET(MODE_APPCURSOR)) ||
3393 (kp->appcursor > 0
3394 && !IS_SET(MODE_APPCURSOR))) {
3395 continue;
3396 }
3397
3398 if((kp->crlf < 0 && IS_SET(MODE_CRLF)) ||
3399 (kp->crlf > 0 && !IS_SET(MODE_CRLF))) {
3400 continue;
3401 }
3402
3403 return kp->s;
3404 }
3405
3406 return NULL;
3407 }
3408
3409 void
3410 kpress(XEvent *ev) {
3411 XKeyEvent *e = &ev->xkey;
3412 KeySym ksym;
3413 char xstr[31], buf[32], *customkey, *cp = buf;
3414 int len, ret;
3415 long c;
3416 Status status;
3417 Shortcut *bp;
3418
3419 if(IS_SET(MODE_KBDLOCK))
3420 return;
3421
3422 len = XmbLookupString(xw.xic, e, xstr, sizeof(xstr), &ksym, &status);
3423 e->state &= ~Mod2Mask;
3424 /* 1. shortcuts */
3425 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3426 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3427 bp->func(&(bp->arg));
3428 return;
3429 }
3430 }
3431
3432 /* 2. custom keys from config.h */
3433 if((customkey = kmap(ksym, e->state))) {
3434 len = strlen(customkey);
3435 memcpy(buf, customkey, len);
3436 /* 3. hardcoded (overrides X lookup) */
3437 } else {
3438 if(len == 0)
3439 return;
3440
3441 if(len == 1 && e->state & Mod1Mask) {
3442 if(IS_SET(MODE_8BIT)) {
3443 if(*xstr < 0177) {
3444 c = *xstr | B7;
3445 ret = utf8encode(&c, cp);
3446 cp += ret;
3447 len = 0;
3448 }
3449 } else {
3450 *cp++ = '\033';
3451 }
3452 }
3453
3454 memcpy(cp, xstr, len);
3455 len = cp - buf + len;
3456 }
3457
3458 ttywrite(buf, len);
3459 if(IS_SET(MODE_ECHO))
3460 techo(buf, len);
3461 }
3462
3463
3464 void
3465 cmessage(XEvent *e) {
3466 /*
3467 * See xembed specs
3468 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3469 */
3470 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3471 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3472 xw.state |= WIN_FOCUSED;
3473 xseturgency(0);
3474 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3475 xw.state &= ~WIN_FOCUSED;
3476 }
3477 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3478 /* Send SIGHUP to shell */
3479 kill(pid, SIGHUP);
3480 exit(EXIT_SUCCESS);
3481 }
3482 }
3483
3484 void
3485 cresize(int width, int height) {
3486 int col, row;
3487
3488 if(width != 0)
3489 xw.w = width;
3490 if(height != 0)
3491 xw.h = height;
3492
3493 col = (xw.w - 2 * borderpx) / xw.cw;
3494 row = (xw.h - 2 * borderpx) / xw.ch;
3495
3496 tresize(col, row);
3497 xresize(col, row);
3498 ttyresize();
3499 }
3500
3501 void
3502 resize(XEvent *e) {
3503 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3504 return;
3505
3506 cresize(e->xconfigure.width, e->xconfigure.height);
3507 }
3508
3509 void
3510 run(void) {
3511 XEvent ev;
3512 fd_set rfd;
3513 int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3514 struct timeval drawtimeout, *tv = NULL, now, last, lastblink;
3515
3516 gettimeofday(&lastblink, NULL);
3517 gettimeofday(&last, NULL);
3518
3519 for(xev = actionfps;;) {
3520 FD_ZERO(&rfd);
3521 FD_SET(cmdfd, &rfd);
3522 FD_SET(xfd, &rfd);
3523
3524 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
3525 if(errno == EINTR)
3526 continue;
3527 die("select failed: %s\n", SERRNO);
3528 }
3529 if(FD_ISSET(cmdfd, &rfd)) {
3530 ttyread();
3531 if(blinktimeout) {
3532 blinkset = tattrset(ATTR_BLINK);
3533 if(!blinkset && term.mode & ATTR_BLINK)
3534 term.mode &= ~(MODE_BLINK);
3535 }
3536 }
3537
3538 if(FD_ISSET(xfd, &rfd))
3539 xev = actionfps;
3540
3541 gettimeofday(&now, NULL);
3542 drawtimeout.tv_sec = 0;
3543 drawtimeout.tv_usec = (1000/xfps) * 1000;
3544 tv = &drawtimeout;
3545
3546 dodraw = 0;
3547 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
3548 tsetdirtattr(ATTR_BLINK);
3549 term.mode ^= MODE_BLINK;
3550 gettimeofday(&lastblink, NULL);
3551 dodraw = 1;
3552 }
3553 if(TIMEDIFF(now, last) \
3554 > (xev? (1000/xfps) : (1000/actionfps))) {
3555 dodraw = 1;
3556 last = now;
3557 }
3558
3559 if(dodraw) {
3560 while(XPending(xw.dpy)) {
3561 XNextEvent(xw.dpy, &ev);
3562 if(XFilterEvent(&ev, None))
3563 continue;
3564 if(handler[ev.type])
3565 (handler[ev.type])(&ev);
3566 }
3567
3568 draw();
3569 XFlush(xw.dpy);
3570
3571 if(xev && !FD_ISSET(xfd, &rfd))
3572 xev--;
3573 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
3574 if(blinkset) {
3575 if(TIMEDIFF(now, lastblink) \
3576 > blinktimeout) {
3577 drawtimeout.tv_usec = 1;
3578 } else {
3579 drawtimeout.tv_usec = (1000 * \
3580 (blinktimeout - \
3581 TIMEDIFF(now,
3582 lastblink)));
3583 }
3584 } else {
3585 tv = NULL;
3586 }
3587 }
3588 }
3589 }
3590 }
3591
3592 void
3593 usage(void) {
3594 die("%s " VERSION " (c) 2010-2013 st engineers\n" \
3595 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]" \
3596 " [-t title] [-w windowid] [-e command ...]\n", argv0);
3597 }
3598
3599 int
3600 main(int argc, char *argv[]) {
3601 int bitm, xr, yr;
3602 uint wr, hr;
3603
3604 xw.fw = xw.fh = xw.fx = xw.fy = 0;
3605 xw.isfixed = False;
3606
3607 ARGBEGIN {
3608 case 'a':
3609 allowaltscreen = false;
3610 break;
3611 case 'c':
3612 opt_class = EARGF(usage());
3613 break;
3614 case 'e':
3615 /* eat all remaining arguments */
3616 if(argc > 1)
3617 opt_cmd = &argv[1];
3618 goto run;
3619 case 'f':
3620 opt_font = EARGF(usage());
3621 break;
3622 case 'g':
3623 bitm = XParseGeometry(EARGF(usage()), &xr, &yr, &wr, &hr);
3624 if(bitm & XValue)
3625 xw.fx = xr;
3626 if(bitm & YValue)
3627 xw.fy = yr;
3628 if(bitm & WidthValue)
3629 xw.fw = (int)wr;
3630 if(bitm & HeightValue)
3631 xw.fh = (int)hr;
3632 if(bitm & XNegative && xw.fx == 0)
3633 xw.fx = -1;
3634 if(bitm & XNegative && xw.fy == 0)
3635 xw.fy = -1;
3636
3637 if(xw.fh != 0 && xw.fw != 0)
3638 xw.isfixed = True;
3639 break;
3640 case 'o':
3641 opt_io = EARGF(usage());
3642 break;
3643 case 't':
3644 opt_title = EARGF(usage());
3645 break;
3646 case 'w':
3647 opt_embed = EARGF(usage());
3648 break;
3649 case 'v':
3650 default:
3651 usage();
3652 } ARGEND;
3653
3654 run:
3655 setlocale(LC_CTYPE, "");
3656 XSetLocaleModifiers("");
3657 tnew(80, 24);
3658 xinit();
3659 ttynew();
3660 selinit();
3661 if(xw.isfixed)
3662 cresize(xw.h, xw.w);
3663 run();
3664
3665 return 0;
3666 }
3667