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8475878331cf31a07c90edb887cacfba2c1cab5b
[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 };
122
123 enum escape_state {
124 ESC_START = 1,
125 ESC_CSI = 2,
126 ESC_STR = 4, /* DSC, OSC, PM, APC */
127 ESC_ALTCHARSET = 8,
128 ESC_STR_END = 16, /* a final string was encountered */
129 ESC_TEST = 32, /* Enter in test mode */
130 };
131
132 enum window_state {
133 WIN_VISIBLE = 1,
134 WIN_REDRAW = 2,
135 WIN_FOCUSED = 4
136 };
137
138 enum selection_type {
139 SEL_REGULAR = 1,
140 SEL_RECTANGULAR = 2
141 };
142
143 enum selection_snap {
144 SNAP_WORD = 1,
145 SNAP_LINE = 2
146 };
147
148 /* bit macro */
149 #undef B0
150 enum { B0=1, B1=2, B2=4, B3=8, B4=16, B5=32, B6=64, B7=128 };
151
152 typedef unsigned char uchar;
153 typedef unsigned int uint;
154 typedef unsigned long ulong;
155 typedef unsigned short ushort;
156
157 typedef struct {
158 char c[UTF_SIZ]; /* character code */
159 uchar mode; /* attribute flags */
160 ushort fg; /* foreground */
161 ushort bg; /* background */
162 } Glyph;
163
164 typedef Glyph *Line;
165
166 typedef struct {
167 Glyph attr; /* current char attributes */
168 int x;
169 int y;
170 char state;
171 } TCursor;
172
173 /* CSI Escape sequence structs */
174 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
175 typedef struct {
176 char buf[ESC_BUF_SIZ]; /* raw string */
177 int len; /* raw string length */
178 char priv;
179 int arg[ESC_ARG_SIZ];
180 int narg; /* nb of args */
181 char mode;
182 } CSIEscape;
183
184 /* STR Escape sequence structs */
185 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
186 typedef struct {
187 char type; /* ESC type ... */
188 char buf[STR_BUF_SIZ]; /* raw string */
189 int len; /* raw string length */
190 char *args[STR_ARG_SIZ];
191 int narg; /* nb of args */
192 } STREscape;
193
194 /* Internal representation of the screen */
195 typedef struct {
196 int row; /* nb row */
197 int col; /* nb col */
198 Line *line; /* screen */
199 Line *alt; /* alternate screen */
200 bool *dirty; /* dirtyness of lines */
201 TCursor c; /* cursor */
202 int top; /* top scroll limit */
203 int bot; /* bottom scroll limit */
204 int mode; /* terminal mode flags */
205 int esc; /* escape state flags */
206 bool numlock; /* lock numbers in keyboard */
207 bool *tabs;
208 } Term;
209
210 /* Purely graphic info */
211 typedef struct {
212 Display *dpy;
213 Colourmap cmap;
214 Window win;
215 Drawable buf;
216 Atom xembed, wmdeletewin;
217 XIM xim;
218 XIC xic;
219 Draw draw;
220 Visual *vis;
221 int scr;
222 bool isfixed; /* is fixed geometry? */
223 int fx, fy, fw, fh; /* fixed geometry */
224 int tw, th; /* tty width and height */
225 int w, h; /* window width and height */
226 int ch; /* char height */
227 int cw; /* char width */
228 char state; /* focus, redraw, visible */
229 } XWindow;
230
231 typedef struct {
232 int b;
233 uint mask;
234 char s[ESC_BUF_SIZ];
235 } Mousekey;
236
237 typedef struct {
238 KeySym k;
239 uint mask;
240 char s[ESC_BUF_SIZ];
241 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
242 signed char appkey; /* application keypad */
243 signed char appcursor; /* application cursor */
244 signed char crlf; /* crlf mode */
245 } Key;
246
247 /* TODO: use better name for vars... */
248 typedef struct {
249 int mode;
250 int type;
251 int snap;
252 int bx, by;
253 int ex, ey;
254 struct {
255 int x, y;
256 } b, e;
257 char *clip;
258 Atom xtarget;
259 bool alt;
260 struct timeval tclick1;
261 struct timeval tclick2;
262 } Selection;
263
264 typedef union {
265 int i;
266 unsigned int ui;
267 float f;
268 const void *v;
269 } Arg;
270
271 typedef struct {
272 unsigned int mod;
273 KeySym keysym;
274 void (*func)(const Arg *);
275 const Arg arg;
276 } Shortcut;
277
278 /* function definitions used in config.h */
279 static void clippaste(const Arg *);
280 static void numlock(const Arg *);
281 static void selpaste(const Arg *);
282 static void xzoom(const Arg *);
283
284 /* Config.h for applying patches and the configuration. */
285 #include "config.h"
286
287 /* Font structure */
288 typedef struct {
289 int height;
290 int width;
291 int ascent;
292 int descent;
293 short lbearing;
294 short rbearing;
295 XftFont *match;
296 FcFontSet *set;
297 FcPattern *pattern;
298 } Font;
299
300 /* Drawing Context */
301 typedef struct {
302 Colour col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
303 Font font, bfont, ifont, ibfont;
304 GC gc;
305 } DC;
306
307 static void die(const char *, ...);
308 static void draw(void);
309 static void redraw(int);
310 static void drawregion(int, int, int, int);
311 static void execsh(void);
312 static void sigchld(int);
313 static void run(void);
314
315 static void csidump(void);
316 static void csihandle(void);
317 static void csiparse(void);
318 static void csireset(void);
319 static void strdump(void);
320 static void strhandle(void);
321 static void strparse(void);
322 static void strreset(void);
323
324 static int tattrset(int);
325 static void tclearregion(int, int, int, int);
326 static void tcursor(int);
327 static void tdeletechar(int);
328 static void tdeleteline(int);
329 static void tinsertblank(int);
330 static void tinsertblankline(int);
331 static void tmoveto(int, int);
332 static void tmoveato(int x, int y);
333 static void tnew(int, int);
334 static void tnewline(int);
335 static void tputtab(bool);
336 static void tputc(char *, int);
337 static void treset(void);
338 static int tresize(int, int);
339 static void tscrollup(int, int);
340 static void tscrolldown(int, int);
341 static void tsetattr(int*, int);
342 static void tsetchar(char *, Glyph *, int, int);
343 static void tsetscroll(int, int);
344 static void tswapscreen(void);
345 static void tsetdirt(int, int);
346 static void tsetdirtattr(int);
347 static void tsetmode(bool, bool, int *, int);
348 static void tfulldirt(void);
349 static void techo(char *, int);
350
351 static inline bool match(uint, uint);
352 static void ttynew(void);
353 static void ttyread(void);
354 static void ttyresize(void);
355 static void ttywrite(const char *, size_t);
356
357 static void xdraws(char *, Glyph, int, int, int, int);
358 static void xhints(void);
359 static void xclear(int, int, int, int);
360 static void xdrawcursor(void);
361 static void xinit(void);
362 static void xloadcols(void);
363 static int xsetcolorname(int, const char *);
364 static int xloadfont(Font *, FcPattern *);
365 static void xloadfonts(char *, int);
366 static int xloadfontset(Font *);
367 static void xsettitle(char *);
368 static void xresettitle(void);
369 static void xseturgency(int);
370 static void xsetsel(char*);
371 static void xtermclear(int, int, int, int);
372 static void xunloadfont(Font *f);
373 static void xunloadfonts(void);
374 static void xresize(int, int);
375
376 static void expose(XEvent *);
377 static void visibility(XEvent *);
378 static void unmap(XEvent *);
379 static char *kmap(KeySym, uint);
380 static void kpress(XEvent *);
381 static void cmessage(XEvent *);
382 static void cresize(int, int);
383 static void resize(XEvent *);
384 static void focus(XEvent *);
385 static void brelease(XEvent *);
386 static void bpress(XEvent *);
387 static void bmotion(XEvent *);
388 static void selnotify(XEvent *);
389 static void selclear(XEvent *);
390 static void selrequest(XEvent *);
391
392 static void selinit(void);
393 static inline bool selected(int, int);
394 static void selcopy(void);
395 static void selscroll(int, int);
396 static void selsnap(int, int *, int *, int);
397
398 static int utf8decode(char *, long *);
399 static int utf8encode(long *, char *);
400 static int utf8size(char *);
401 static int isfullutf8(char *, int);
402
403 static ssize_t xwrite(int, char *, size_t);
404 static void *xmalloc(size_t);
405 static void *xrealloc(void *, size_t);
406 static void *xcalloc(size_t, size_t);
407
408 static void (*handler[LASTEvent])(XEvent *) = {
409 [KeyPress] = kpress,
410 [ClientMessage] = cmessage,
411 [ConfigureNotify] = resize,
412 [VisibilityNotify] = visibility,
413 [UnmapNotify] = unmap,
414 [Expose] = expose,
415 [FocusIn] = focus,
416 [FocusOut] = focus,
417 [MotionNotify] = bmotion,
418 [ButtonPress] = bpress,
419 [ButtonRelease] = brelease,
420 [SelectionClear] = selclear,
421 [SelectionNotify] = selnotify,
422 [SelectionRequest] = selrequest,
423 };
424
425 /* Globals */
426 static DC dc;
427 static XWindow xw;
428 static Term term;
429 static CSIEscape csiescseq;
430 static STREscape strescseq;
431 static int cmdfd;
432 static pid_t pid;
433 static Selection sel;
434 static int iofd = -1;
435 static char **opt_cmd = NULL;
436 static char *opt_io = NULL;
437 static char *opt_title = NULL;
438 static char *opt_embed = NULL;
439 static char *opt_class = NULL;
440 static char *opt_font = NULL;
441
442 static char *usedfont = NULL;
443 static int usedfontsize = 0;
444
445 /* Font Ring Cache */
446 enum {
447 FRC_NORMAL,
448 FRC_ITALIC,
449 FRC_BOLD,
450 FRC_ITALICBOLD
451 };
452
453 typedef struct {
454 XftFont *font;
455 long c;
456 int flags;
457 } Fontcache;
458
459 /*
460 * Fontcache is a ring buffer, with frccur as current position and frclen as
461 * the current length of used elements.
462 */
463
464 static Fontcache frc[1024];
465 static int frccur = -1, frclen = 0;
466
467 ssize_t
468 xwrite(int fd, char *s, size_t len) {
469 size_t aux = len;
470
471 while(len > 0) {
472 ssize_t r = write(fd, s, len);
473 if(r < 0)
474 return r;
475 len -= r;
476 s += r;
477 }
478 return aux;
479 }
480
481 void *
482 xmalloc(size_t len) {
483 void *p = malloc(len);
484
485 if(!p)
486 die("Out of memory\n");
487
488 return p;
489 }
490
491 void *
492 xrealloc(void *p, size_t len) {
493 if((p = realloc(p, len)) == NULL)
494 die("Out of memory\n");
495
496 return p;
497 }
498
499 void *
500 xcalloc(size_t nmemb, size_t size) {
501 void *p = calloc(nmemb, size);
502
503 if(!p)
504 die("Out of memory\n");
505
506 return p;
507 }
508
509 int
510 utf8decode(char *s, long *u) {
511 uchar c;
512 int i, n, rtn;
513
514 rtn = 1;
515 c = *s;
516 if(~c & B7) { /* 0xxxxxxx */
517 *u = c;
518 return rtn;
519 } else if((c & (B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */
520 *u = c&(B4|B3|B2|B1|B0);
521 n = 1;
522 } else if((c & (B7|B6|B5|B4)) == (B7|B6|B5)) { /* 1110xxxx */
523 *u = c&(B3|B2|B1|B0);
524 n = 2;
525 } else if((c & (B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) { /* 11110xxx */
526 *u = c & (B2|B1|B0);
527 n = 3;
528 } else {
529 goto invalid;
530 }
531
532 for(i = n, ++s; i > 0; --i, ++rtn, ++s) {
533 c = *s;
534 if((c & (B7|B6)) != B7) /* 10xxxxxx */
535 goto invalid;
536 *u <<= 6;
537 *u |= c & (B5|B4|B3|B2|B1|B0);
538 }
539
540 if((n == 1 && *u < 0x80) ||
541 (n == 2 && *u < 0x800) ||
542 (n == 3 && *u < 0x10000) ||
543 (*u >= 0xD800 && *u <= 0xDFFF)) {
544 goto invalid;
545 }
546
547 return rtn;
548 invalid:
549 *u = 0xFFFD;
550
551 return rtn;
552 }
553
554 int
555 utf8encode(long *u, char *s) {
556 uchar *sp;
557 ulong uc;
558 int i, n;
559
560 sp = (uchar *)s;
561 uc = *u;
562 if(uc < 0x80) {
563 *sp = uc; /* 0xxxxxxx */
564 return 1;
565 } else if(*u < 0x800) {
566 *sp = (uc >> 6) | (B7|B6); /* 110xxxxx */
567 n = 1;
568 } else if(uc < 0x10000) {
569 *sp = (uc >> 12) | (B7|B6|B5); /* 1110xxxx */
570 n = 2;
571 } else if(uc <= 0x10FFFF) {
572 *sp = (uc >> 18) | (B7|B6|B5|B4); /* 11110xxx */
573 n = 3;
574 } else {
575 goto invalid;
576 }
577
578 for(i=n,++sp; i>0; --i,++sp)
579 *sp = ((uc >> 6*(i-1)) & (B5|B4|B3|B2|B1|B0)) | B7; /* 10xxxxxx */
580
581 return n+1;
582 invalid:
583 /* U+FFFD */
584 *s++ = '\xEF';
585 *s++ = '\xBF';
586 *s = '\xBD';
587
588 return 3;
589 }
590
591 /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
592 UTF-8 otherwise return 0 */
593 int
594 isfullutf8(char *s, int b) {
595 uchar *c1, *c2, *c3;
596
597 c1 = (uchar *)s;
598 c2 = (uchar *)++s;
599 c3 = (uchar *)++s;
600 if(b < 1) {
601 return 0;
602 } else if((*c1&(B7|B6|B5)) == (B7|B6) && b == 1) {
603 return 0;
604 } else if((*c1&(B7|B6|B5|B4)) == (B7|B6|B5) &&
605 ((b == 1) ||
606 ((b == 2) && (*c2&(B7|B6)) == B7))) {
607 return 0;
608 } else if((*c1&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4) &&
609 ((b == 1) ||
610 ((b == 2) && (*c2&(B7|B6)) == B7) ||
611 ((b == 3) && (*c2&(B7|B6)) == B7 && (*c3&(B7|B6)) == B7))) {
612 return 0;
613 } else {
614 return 1;
615 }
616 }
617
618 int
619 utf8size(char *s) {
620 uchar c = *s;
621
622 if(~c&B7) {
623 return 1;
624 } else if((c&(B7|B6|B5)) == (B7|B6)) {
625 return 2;
626 } else if((c&(B7|B6|B5|B4)) == (B7|B6|B5)) {
627 return 3;
628 } else {
629 return 4;
630 }
631 }
632
633 void
634 selinit(void) {
635 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
636 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
637 sel.mode = 0;
638 sel.bx = -1;
639 sel.clip = NULL;
640 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
641 if(sel.xtarget == None)
642 sel.xtarget = XA_STRING;
643 }
644
645 static int
646 x2col(int x) {
647 x -= borderpx;
648 x /= xw.cw;
649
650 return LIMIT(x, 0, term.col-1);
651 }
652
653 static int
654 y2row(int y) {
655 y -= borderpx;
656 y /= xw.ch;
657
658 return LIMIT(y, 0, term.row-1);
659 }
660
661 static inline bool
662 selected(int x, int y) {
663 int bx, ex;
664
665 if(sel.ey == y && sel.by == y) {
666 bx = MIN(sel.bx, sel.ex);
667 ex = MAX(sel.bx, sel.ex);
668
669 return BETWEEN(x, bx, ex);
670 }
671
672 if(sel.type == SEL_RECTANGULAR) {
673 return ((sel.b.y <= y && y <= sel.e.y)
674 && (sel.b.x <= x && x <= sel.e.x));
675 }
676 return ((sel.b.y < y && y < sel.e.y)
677 || (y == sel.e.y && x <= sel.e.x))
678 || (y == sel.b.y && x >= sel.b.x
679 && (x <= sel.e.x || sel.b.y != sel.e.y));
680 }
681
682 void
683 selsnap(int mode, int *x, int *y, int direction) {
684 int i;
685
686 switch(mode) {
687 case SNAP_WORD:
688 /*
689 * Snap around if the word wraps around at the end or
690 * beginning of a line.
691 */
692 for(;;) {
693 if(direction < 0 && *x <= 0) {
694 if(*y > 0 && term.line[*y - 1][term.col-1].mode
695 & ATTR_WRAP) {
696 *y -= 1;
697 *x = term.col-1;
698 } else {
699 break;
700 }
701 }
702 if(direction > 0 && *x >= term.col-1) {
703 if(*y < term.row-1 && term.line[*y][*x].mode
704 & ATTR_WRAP) {
705 *y += 1;
706 *x = 0;
707 } else {
708 break;
709 }
710 }
711
712 if(strchr(worddelimiters,
713 term.line[*y][*x + direction].c[0])) {
714 break;
715 }
716
717 *x += direction;
718 }
719 break;
720 case SNAP_LINE:
721 /*
722 * Snap around if the the previous line or the current one
723 * has set ATTR_WRAP at its end. Then the whole next or
724 * previous line will be selected.
725 */
726 *x = (direction < 0) ? 0 : term.col - 1;
727 if(direction < 0 && *y > 0) {
728 for(; *y > 0; *y += direction) {
729 if(!(term.line[*y-1][term.col-1].mode
730 & ATTR_WRAP)) {
731 break;
732 }
733 }
734 } else if(direction > 0 && *y < term.row-1) {
735 for(; *y < term.row; *y += direction) {
736 if(!(term.line[*y][term.col-1].mode
737 & ATTR_WRAP)) {
738 break;
739 }
740 }
741 }
742 break;
743 default:
744 /*
745 * Select the whole line when the end of line is reached.
746 */
747 if(direction > 0) {
748 i = term.col;
749 while(--i > 0 && term.line[*y][i].c[0] == ' ')
750 /* nothing */;
751 if(i > 0 && i < *x)
752 *x = term.col - 1;
753 }
754 break;
755 }
756 }
757
758 void
759 getbuttoninfo(XEvent *e) {
760 int type;
761 uint state = e->xbutton.state &~Button1Mask;
762
763 sel.alt = IS_SET(MODE_ALTSCREEN);
764
765 sel.ex = x2col(e->xbutton.x);
766 sel.ey = y2row(e->xbutton.y);
767
768 if (sel.by < sel.ey
769 || (sel.by == sel.ey && sel.bx < sel.ex)) {
770 selsnap(sel.snap, &sel.bx, &sel.by, -1);
771 selsnap(sel.snap, &sel.ex, &sel.ey, +1);
772 } else {
773 selsnap(sel.snap, &sel.ex, &sel.ey, -1);
774 selsnap(sel.snap, &sel.bx, &sel.by, +1);
775 }
776
777 sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
778 sel.b.y = MIN(sel.by, sel.ey);
779 sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
780 sel.e.y = MAX(sel.by, sel.ey);
781
782 sel.type = SEL_REGULAR;
783 for(type = 1; type < LEN(selmasks); ++type) {
784 if(match(selmasks[type], state)) {
785 sel.type = type;
786 break;
787 }
788 }
789 }
790
791 void
792 mousereport(XEvent *e) {
793 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
794 button = e->xbutton.button, state = e->xbutton.state,
795 len;
796 char buf[40];
797 static int ob, ox, oy;
798
799 /* from urxvt */
800 if(e->xbutton.type == MotionNotify) {
801 if(!IS_SET(MODE_MOUSEMOTION) || (x == ox && y == oy))
802 return;
803 button = ob + 32;
804 ox = x, oy = y;
805 } else if(!IS_SET(MODE_MOUSESGR)
806 && (e->xbutton.type == ButtonRelease
807 || button == AnyButton)) {
808 button = 3;
809 } else {
810 button -= Button1;
811 if(button >= 3)
812 button += 64 - 3;
813 if(e->xbutton.type == ButtonPress) {
814 ob = button;
815 ox = x, oy = y;
816 }
817 }
818
819 button += (state & ShiftMask ? 4 : 0)
820 + (state & Mod4Mask ? 8 : 0)
821 + (state & ControlMask ? 16 : 0);
822
823 len = 0;
824 if(IS_SET(MODE_MOUSESGR)) {
825 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
826 button, x+1, y+1,
827 e->xbutton.type == ButtonRelease ? 'm' : 'M');
828 } else if(x < 223 && y < 223) {
829 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
830 32+button, 32+x+1, 32+y+1);
831 } else {
832 return;
833 }
834
835 ttywrite(buf, len);
836 }
837
838 void
839 bpress(XEvent *e) {
840 struct timeval now;
841 Mousekey *mk;
842
843 if(IS_SET(MODE_MOUSE)) {
844 mousereport(e);
845 return;
846 }
847
848 for(mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
849 if(e->xbutton.button == mk->b
850 && match(mk->mask, e->xbutton.state)) {
851 ttywrite(mk->s, strlen(mk->s));
852 if(IS_SET(MODE_ECHO))
853 techo(mk->s, strlen(mk->s));
854 return;
855 }
856 }
857
858 if(e->xbutton.button == Button1) {
859 gettimeofday(&now, NULL);
860
861 /* Clear previous selection, logically and visually. */
862 if(sel.bx != -1) {
863 sel.bx = -1;
864 tsetdirt(sel.b.y, sel.e.y);
865 draw();
866 }
867 sel.mode = 1;
868 sel.type = SEL_REGULAR;
869 sel.ex = sel.bx = x2col(e->xbutton.x);
870 sel.ey = sel.by = y2row(e->xbutton.y);
871
872 /*
873 * If the user clicks below predefined timeouts specific
874 * snapping behaviour is exposed.
875 */
876 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
877 sel.snap = SNAP_LINE;
878 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
879 sel.snap = SNAP_WORD;
880 } else {
881 sel.snap = 0;
882 }
883 selsnap(sel.snap, &sel.bx, &sel.by, -1);
884 selsnap(sel.snap, &sel.ex, &sel.ey, +1);
885 sel.b.x = sel.bx;
886 sel.b.y = sel.by;
887 sel.e.x = sel.ex;
888 sel.e.y = sel.ey;
889
890 /*
891 * Draw selection, unless it's regular and we don't want to
892 * make clicks visible
893 */
894 if(sel.snap != 0) {
895 sel.mode++;
896 tsetdirt(sel.b.y, sel.e.y);
897 draw();
898 }
899 sel.tclick2 = sel.tclick1;
900 sel.tclick1 = now;
901 }
902 }
903
904 void
905 selcopy(void) {
906 char *str, *ptr;
907 int x, y, bufsize, size, i, ex;
908 Glyph *gp, *last;
909
910 if(sel.bx == -1) {
911 str = NULL;
912 } else {
913 bufsize = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
914 ptr = str = xmalloc(bufsize);
915
916 /* append every set & selected glyph to the selection */
917 for(y = sel.b.y; y < sel.e.y + 1; y++) {
918 gp = &term.line[y][0];
919 last = gp + term.col;
920
921 while(--last >= gp && !(selected(last - gp, y) && \
922 strcmp(last->c, " ") != 0))
923 /* nothing */;
924
925 for(x = 0; gp <= last; x++, ++gp) {
926 if(!selected(x, y))
927 continue;
928
929 size = utf8size(gp->c);
930 memcpy(ptr, gp->c, size);
931 ptr += size;
932 }
933
934 /*
935 * Copy and pasting of line endings is inconsistent
936 * in the inconsistent terminal and GUI world.
937 * The best solution seems like to produce '\n' when
938 * something is copied from st and convert '\n' to
939 * '\r', when something to be pasted is received by
940 * st.
941 * FIXME: Fix the computer world.
942 */
943 if(y < sel.e.y && !((gp-1)->mode & ATTR_WRAP))
944 *ptr++ = '\n';
945
946 /*
947 * If the last selected line expands in the selection
948 * after the visible text '\n' is appended.
949 */
950 if(y == sel.e.y) {
951 i = term.col;
952 while(--i > 0 && term.line[y][i].c[0] == ' ')
953 /* nothing */;
954 ex = sel.e.x;
955 if(sel.b.y == sel.e.y && sel.e.x < sel.b.x)
956 ex = sel.b.x;
957 if(i < ex)
958 *ptr++ = '\n';
959 }
960 }
961 *ptr = 0;
962 }
963 xsetsel(str);
964 }
965
966 void
967 selnotify(XEvent *e) {
968 ulong nitems, ofs, rem;
969 int format;
970 uchar *data, *last, *repl;
971 Atom type;
972
973 ofs = 0;
974 do {
975 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
976 False, AnyPropertyType, &type, &format,
977 &nitems, &rem, &data)) {
978 fprintf(stderr, "Clipboard allocation failed\n");
979 return;
980 }
981
982 /*
983 * As seen in selcopy:
984 * Line endings are inconsistent in the terminal and GUI world
985 * copy and pasting. When receiving some selection data,
986 * replace all '\n' with '\r'.
987 * FIXME: Fix the computer world.
988 */
989 repl = data;
990 last = data + nitems * format / 8;
991 while((repl = memchr(repl, '\n', last - repl))) {
992 *repl++ = '\r';
993 }
994
995 ttywrite((const char *)data, nitems * format / 8);
996 XFree(data);
997 /* number of 32-bit chunks returned */
998 ofs += nitems * format / 32;
999 } while(rem > 0);
1000 }
1001
1002 void
1003 selpaste(const Arg *dummy) {
1004 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
1005 xw.win, CurrentTime);
1006 }
1007
1008 void
1009 clippaste(const Arg *dummy) {
1010 Atom clipboard;
1011
1012 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1013 XConvertSelection(xw.dpy, clipboard, sel.xtarget, XA_PRIMARY,
1014 xw.win, CurrentTime);
1015 }
1016
1017 void
1018 selclear(XEvent *e) {
1019 if(sel.bx == -1)
1020 return;
1021 sel.bx = -1;
1022 tsetdirt(sel.b.y, sel.e.y);
1023 }
1024
1025 void
1026 selrequest(XEvent *e) {
1027 XSelectionRequestEvent *xsre;
1028 XSelectionEvent xev;
1029 Atom xa_targets, string;
1030
1031 xsre = (XSelectionRequestEvent *) e;
1032 xev.type = SelectionNotify;
1033 xev.requestor = xsre->requestor;
1034 xev.selection = xsre->selection;
1035 xev.target = xsre->target;
1036 xev.time = xsre->time;
1037 /* reject */
1038 xev.property = None;
1039
1040 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
1041 if(xsre->target == xa_targets) {
1042 /* respond with the supported type */
1043 string = sel.xtarget;
1044 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1045 XA_ATOM, 32, PropModeReplace,
1046 (uchar *) &string, 1);
1047 xev.property = xsre->property;
1048 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
1049 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1050 xsre->target, 8, PropModeReplace,
1051 (uchar *) sel.clip, strlen(sel.clip));
1052 xev.property = xsre->property;
1053 }
1054
1055 /* all done, send a notification to the listener */
1056 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
1057 fprintf(stderr, "Error sending SelectionNotify event\n");
1058 }
1059
1060 void
1061 xsetsel(char *str) {
1062 /* register the selection for both the clipboard and the primary */
1063 Atom clipboard;
1064
1065 free(sel.clip);
1066 sel.clip = str;
1067
1068 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
1069
1070 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1071 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
1072 }
1073
1074 void
1075 brelease(XEvent *e) {
1076 if(IS_SET(MODE_MOUSE)) {
1077 mousereport(e);
1078 return;
1079 }
1080
1081 if(e->xbutton.button == Button2) {
1082 selpaste(NULL);
1083 } else if(e->xbutton.button == Button1) {
1084 if(sel.mode < 2) {
1085 sel.bx = -1;
1086 } else {
1087 getbuttoninfo(e);
1088 selcopy();
1089 }
1090 sel.mode = 0;
1091 term.dirty[sel.ey] = 1;
1092 }
1093 }
1094
1095 void
1096 bmotion(XEvent *e) {
1097 int oldey, oldex, oldsby, oldsey;
1098
1099 if(IS_SET(MODE_MOUSE)) {
1100 mousereport(e);
1101 return;
1102 }
1103
1104 if(!sel.mode)
1105 return;
1106
1107 sel.mode++;
1108 oldey = sel.ey;
1109 oldex = sel.ex;
1110 oldsby = sel.b.y;
1111 oldsey = sel.e.y;
1112 getbuttoninfo(e);
1113
1114 if(oldey != sel.ey || oldex != sel.ex) {
1115 tsetdirt(MIN(sel.b.y, oldsby), MAX(sel.e.y, oldsey));
1116 }
1117 }
1118
1119 void
1120 die(const char *errstr, ...) {
1121 va_list ap;
1122
1123 va_start(ap, errstr);
1124 vfprintf(stderr, errstr, ap);
1125 va_end(ap);
1126 exit(EXIT_FAILURE);
1127 }
1128
1129 void
1130 execsh(void) {
1131 char **args;
1132 char *envshell = getenv("SHELL");
1133 const struct passwd *pass = getpwuid(getuid());
1134 char buf[sizeof(long) * 8 + 1];
1135
1136 unsetenv("COLUMNS");
1137 unsetenv("LINES");
1138 unsetenv("TERMCAP");
1139
1140 if(pass) {
1141 setenv("LOGNAME", pass->pw_name, 1);
1142 setenv("USER", pass->pw_name, 1);
1143 setenv("SHELL", pass->pw_shell, 0);
1144 setenv("HOME", pass->pw_dir, 0);
1145 }
1146
1147 snprintf(buf, sizeof(buf), "%lu", xw.win);
1148 setenv("WINDOWID", buf, 1);
1149
1150 signal(SIGCHLD, SIG_DFL);
1151 signal(SIGHUP, SIG_DFL);
1152 signal(SIGINT, SIG_DFL);
1153 signal(SIGQUIT, SIG_DFL);
1154 signal(SIGTERM, SIG_DFL);
1155 signal(SIGALRM, SIG_DFL);
1156
1157 DEFAULT(envshell, shell);
1158 setenv("TERM", termname, 1);
1159 args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
1160 execvp(args[0], args);
1161 exit(EXIT_FAILURE);
1162 }
1163
1164 void
1165 sigchld(int a) {
1166 int stat = 0;
1167
1168 if(waitpid(pid, &stat, 0) < 0)
1169 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
1170
1171 if(WIFEXITED(stat)) {
1172 exit(WEXITSTATUS(stat));
1173 } else {
1174 exit(EXIT_FAILURE);
1175 }
1176 }
1177
1178 void
1179 ttynew(void) {
1180 int m, s;
1181 struct winsize w = {term.row, term.col, 0, 0};
1182
1183 /* seems to work fine on linux, openbsd and freebsd */
1184 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1185 die("openpty failed: %s\n", SERRNO);
1186
1187 switch(pid = fork()) {
1188 case -1:
1189 die("fork failed\n");
1190 break;
1191 case 0:
1192 setsid(); /* create a new process group */
1193 dup2(s, STDIN_FILENO);
1194 dup2(s, STDOUT_FILENO);
1195 dup2(s, STDERR_FILENO);
1196 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1197 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
1198 close(s);
1199 close(m);
1200 execsh();
1201 break;
1202 default:
1203 close(s);
1204 cmdfd = m;
1205 signal(SIGCHLD, sigchld);
1206 if(opt_io) {
1207 iofd = (!strcmp(opt_io, "-")) ?
1208 STDOUT_FILENO :
1209 open(opt_io, O_WRONLY | O_CREAT, 0666);
1210 if(iofd < 0) {
1211 fprintf(stderr, "Error opening %s:%s\n",
1212 opt_io, strerror(errno));
1213 }
1214 }
1215 }
1216 }
1217
1218 void
1219 dump(char c) {
1220 static int col;
1221
1222 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
1223 if(++col % 10 == 0)
1224 fprintf(stderr, "\n");
1225 }
1226
1227 void
1228 ttyread(void) {
1229 static char buf[BUFSIZ];
1230 static int buflen = 0;
1231 char *ptr;
1232 char s[UTF_SIZ];
1233 int charsize; /* size of utf8 char in bytes */
1234 long utf8c;
1235 int ret;
1236
1237 /* append read bytes to unprocessed bytes */
1238 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1239 die("Couldn't read from shell: %s\n", SERRNO);
1240
1241 /* process every complete utf8 char */
1242 buflen += ret;
1243 ptr = buf;
1244 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
1245 charsize = utf8decode(ptr, &utf8c);
1246 utf8encode(&utf8c, s);
1247 tputc(s, charsize);
1248 ptr += charsize;
1249 buflen -= charsize;
1250 }
1251
1252 /* keep any uncomplete utf8 char for the next call */
1253 memmove(buf, ptr, buflen);
1254 }
1255
1256 void
1257 ttywrite(const char *s, size_t n) {
1258 if(write(cmdfd, s, n) == -1)
1259 die("write error on tty: %s\n", SERRNO);
1260 }
1261
1262 void
1263 ttyresize(void) {
1264 struct winsize w;
1265
1266 w.ws_row = term.row;
1267 w.ws_col = term.col;
1268 w.ws_xpixel = xw.tw;
1269 w.ws_ypixel = xw.th;
1270 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1271 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
1272 }
1273
1274 int
1275 tattrset(int attr) {
1276 int i, j;
1277
1278 for(i = 0; i < term.row-1; i++) {
1279 for(j = 0; j < term.col-1; j++) {
1280 if(term.line[i][j].mode & attr)
1281 return 1;
1282 }
1283 }
1284
1285 return 0;
1286 }
1287
1288 void
1289 tsetdirt(int top, int bot) {
1290 int i;
1291
1292 LIMIT(top, 0, term.row-1);
1293 LIMIT(bot, 0, term.row-1);
1294
1295 for(i = top; i <= bot; i++)
1296 term.dirty[i] = 1;
1297 }
1298
1299 void
1300 tsetdirtattr(int attr) {
1301 int i, j;
1302
1303 for(i = 0; i < term.row-1; i++) {
1304 for(j = 0; j < term.col-1; j++) {
1305 if(term.line[i][j].mode & attr) {
1306 tsetdirt(i, i);
1307 break;
1308 }
1309 }
1310 }
1311 }
1312
1313 void
1314 tfulldirt(void) {
1315 tsetdirt(0, term.row-1);
1316 }
1317
1318 void
1319 tcursor(int mode) {
1320 static TCursor c;
1321
1322 if(mode == CURSOR_SAVE) {
1323 c = term.c;
1324 } else if(mode == CURSOR_LOAD) {
1325 term.c = c;
1326 tmoveto(c.x, c.y);
1327 }
1328 }
1329
1330 void
1331 treset(void) {
1332 uint i;
1333
1334 term.c = (TCursor){{
1335 .mode = ATTR_NULL,
1336 .fg = defaultfg,
1337 .bg = defaultbg
1338 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1339
1340 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1341 for(i = tabspaces; i < term.col; i += tabspaces)
1342 term.tabs[i] = 1;
1343 term.top = 0;
1344 term.bot = term.row - 1;
1345 term.mode = MODE_WRAP;
1346
1347 tclearregion(0, 0, term.col-1, term.row-1);
1348 tmoveto(0, 0);
1349 tcursor(CURSOR_SAVE);
1350 }
1351
1352 void
1353 tnew(int col, int row) {
1354 memset(&term, 0, sizeof(Term));
1355 tresize(col, row);
1356 term.numlock = 1;
1357
1358 treset();
1359 }
1360
1361 void
1362 tswapscreen(void) {
1363 Line *tmp = term.line;
1364
1365 term.line = term.alt;
1366 term.alt = tmp;
1367 term.mode ^= MODE_ALTSCREEN;
1368 tfulldirt();
1369 }
1370
1371 void
1372 tscrolldown(int orig, int n) {
1373 int i;
1374 Line temp;
1375
1376 LIMIT(n, 0, term.bot-orig+1);
1377
1378 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1379
1380 for(i = term.bot; i >= orig+n; i--) {
1381 temp = term.line[i];
1382 term.line[i] = term.line[i-n];
1383 term.line[i-n] = temp;
1384
1385 term.dirty[i] = 1;
1386 term.dirty[i-n] = 1;
1387 }
1388
1389 selscroll(orig, n);
1390 }
1391
1392 void
1393 tscrollup(int orig, int n) {
1394 int i;
1395 Line temp;
1396 LIMIT(n, 0, term.bot-orig+1);
1397
1398 tclearregion(0, orig, term.col-1, orig+n-1);
1399
1400 for(i = orig; i <= term.bot-n; i++) {
1401 temp = term.line[i];
1402 term.line[i] = term.line[i+n];
1403 term.line[i+n] = temp;
1404
1405 term.dirty[i] = 1;
1406 term.dirty[i+n] = 1;
1407 }
1408
1409 selscroll(orig, -n);
1410 }
1411
1412 void
1413 selscroll(int orig, int n) {
1414 if(sel.bx == -1)
1415 return;
1416
1417 if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
1418 if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
1419 sel.bx = -1;
1420 return;
1421 }
1422 if(sel.type == SEL_RECTANGULAR) {
1423 if(sel.by < term.top)
1424 sel.by = term.top;
1425 if(sel.ey > term.bot)
1426 sel.ey = term.bot;
1427 } else {
1428 if(sel.by < term.top) {
1429 sel.by = term.top;
1430 sel.bx = 0;
1431 }
1432 if(sel.ey > term.bot) {
1433 sel.ey = term.bot;
1434 sel.ex = term.col;
1435 }
1436 }
1437 sel.b.y = sel.by, sel.b.x = sel.bx;
1438 sel.e.y = sel.ey, sel.e.x = sel.ex;
1439 }
1440 }
1441
1442 void
1443 tnewline(int first_col) {
1444 int y = term.c.y;
1445
1446 if(y == term.bot) {
1447 tscrollup(term.top, 1);
1448 } else {
1449 y++;
1450 }
1451 tmoveto(first_col ? 0 : term.c.x, y);
1452 }
1453
1454 void
1455 csiparse(void) {
1456 char *p = csiescseq.buf, *np;
1457 long int v;
1458
1459 csiescseq.narg = 0;
1460 if(*p == '?') {
1461 csiescseq.priv = 1;
1462 p++;
1463 }
1464
1465 csiescseq.buf[csiescseq.len] = '\0';
1466 while(p < csiescseq.buf+csiescseq.len) {
1467 np = NULL;
1468 v = strtol(p, &np, 10);
1469 if(np == p)
1470 v = 0;
1471 if(v == LONG_MAX || v == LONG_MIN)
1472 v = -1;
1473 csiescseq.arg[csiescseq.narg++] = v;
1474 p = np;
1475 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1476 break;
1477 p++;
1478 }
1479 csiescseq.mode = *p;
1480 }
1481
1482 /* for absolute user moves, when decom is set */
1483 void
1484 tmoveato(int x, int y) {
1485 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1486 }
1487
1488 void
1489 tmoveto(int x, int y) {
1490 int miny, maxy;
1491
1492 if(term.c.state & CURSOR_ORIGIN) {
1493 miny = term.top;
1494 maxy = term.bot;
1495 } else {
1496 miny = 0;
1497 maxy = term.row - 1;
1498 }
1499 LIMIT(x, 0, term.col-1);
1500 LIMIT(y, miny, maxy);
1501 term.c.state &= ~CURSOR_WRAPNEXT;
1502 term.c.x = x;
1503 term.c.y = y;
1504 }
1505
1506 void
1507 tsetchar(char *c, Glyph *attr, int x, int y) {
1508 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1509 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1510 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1511 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1512 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1513 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1514 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1515 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1516 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1517 };
1518
1519 /*
1520 * The table is proudly stolen from rxvt.
1521 */
1522 if(attr->mode & ATTR_GFX) {
1523 if(c[0] >= 0x41 && c[0] <= 0x7e
1524 && vt100_0[c[0] - 0x41]) {
1525 c = vt100_0[c[0] - 0x41];
1526 }
1527 }
1528
1529 term.dirty[y] = 1;
1530 term.line[y][x] = *attr;
1531 memcpy(term.line[y][x].c, c, UTF_SIZ);
1532 }
1533
1534 void
1535 tclearregion(int x1, int y1, int x2, int y2) {
1536 int x, y, temp;
1537
1538 if(x1 > x2)
1539 temp = x1, x1 = x2, x2 = temp;
1540 if(y1 > y2)
1541 temp = y1, y1 = y2, y2 = temp;
1542
1543 LIMIT(x1, 0, term.col-1);
1544 LIMIT(x2, 0, term.col-1);
1545 LIMIT(y1, 0, term.row-1);
1546 LIMIT(y2, 0, term.row-1);
1547
1548 for(y = y1; y <= y2; y++) {
1549 term.dirty[y] = 1;
1550 for(x = x1; x <= x2; x++) {
1551 if(selected(x, y))
1552 selclear(NULL);
1553 term.line[y][x] = term.c.attr;
1554 memcpy(term.line[y][x].c, " ", 2);
1555 }
1556 }
1557 }
1558
1559 void
1560 tdeletechar(int n) {
1561 int src = term.c.x + n;
1562 int dst = term.c.x;
1563 int size = term.col - src;
1564
1565 term.dirty[term.c.y] = 1;
1566
1567 if(src >= term.col) {
1568 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1569 return;
1570 }
1571
1572 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1573 size * sizeof(Glyph));
1574 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1575 }
1576
1577 void
1578 tinsertblank(int n) {
1579 int src = term.c.x;
1580 int dst = src + n;
1581 int size = term.col - dst;
1582
1583 term.dirty[term.c.y] = 1;
1584
1585 if(dst >= term.col) {
1586 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1587 return;
1588 }
1589
1590 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1591 size * sizeof(Glyph));
1592 tclearregion(src, term.c.y, dst - 1, term.c.y);
1593 }
1594
1595 void
1596 tinsertblankline(int n) {
1597 if(term.c.y < term.top || term.c.y > term.bot)
1598 return;
1599
1600 tscrolldown(term.c.y, n);
1601 }
1602
1603 void
1604 tdeleteline(int n) {
1605 if(term.c.y < term.top || term.c.y > term.bot)
1606 return;
1607
1608 tscrollup(term.c.y, n);
1609 }
1610
1611 void
1612 tsetattr(int *attr, int l) {
1613 int i;
1614
1615 for(i = 0; i < l; i++) {
1616 switch(attr[i]) {
1617 case 0:
1618 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE \
1619 | ATTR_BOLD | ATTR_ITALIC \
1620 | ATTR_BLINK);
1621 term.c.attr.fg = defaultfg;
1622 term.c.attr.bg = defaultbg;
1623 break;
1624 case 1:
1625 term.c.attr.mode |= ATTR_BOLD;
1626 break;
1627 case 3:
1628 term.c.attr.mode |= ATTR_ITALIC;
1629 break;
1630 case 4:
1631 term.c.attr.mode |= ATTR_UNDERLINE;
1632 break;
1633 case 5: /* slow blink */
1634 case 6: /* rapid blink */
1635 term.c.attr.mode |= ATTR_BLINK;
1636 break;
1637 case 7:
1638 term.c.attr.mode |= ATTR_REVERSE;
1639 break;
1640 case 21:
1641 case 22:
1642 term.c.attr.mode &= ~ATTR_BOLD;
1643 break;
1644 case 23:
1645 term.c.attr.mode &= ~ATTR_ITALIC;
1646 break;
1647 case 24:
1648 term.c.attr.mode &= ~ATTR_UNDERLINE;
1649 break;
1650 case 25:
1651 case 26:
1652 term.c.attr.mode &= ~ATTR_BLINK;
1653 break;
1654 case 27:
1655 term.c.attr.mode &= ~ATTR_REVERSE;
1656 break;
1657 case 38:
1658 if(i + 2 < l && attr[i + 1] == 5) {
1659 i += 2;
1660 if(BETWEEN(attr[i], 0, 255)) {
1661 term.c.attr.fg = attr[i];
1662 } else {
1663 fprintf(stderr,
1664 "erresc: bad fgcolor %d\n",
1665 attr[i]);
1666 }
1667 } else {
1668 fprintf(stderr,
1669 "erresc(38): gfx attr %d unknown\n",
1670 attr[i]);
1671 }
1672 break;
1673 case 39:
1674 term.c.attr.fg = defaultfg;
1675 break;
1676 case 48:
1677 if(i + 2 < l && attr[i + 1] == 5) {
1678 i += 2;
1679 if(BETWEEN(attr[i], 0, 255)) {
1680 term.c.attr.bg = attr[i];
1681 } else {
1682 fprintf(stderr,
1683 "erresc: bad bgcolor %d\n",
1684 attr[i]);
1685 }
1686 } else {
1687 fprintf(stderr,
1688 "erresc(48): gfx attr %d unknown\n",
1689 attr[i]);
1690 }
1691 break;
1692 case 49:
1693 term.c.attr.bg = defaultbg;
1694 break;
1695 default:
1696 if(BETWEEN(attr[i], 30, 37)) {
1697 term.c.attr.fg = attr[i] - 30;
1698 } else if(BETWEEN(attr[i], 40, 47)) {
1699 term.c.attr.bg = attr[i] - 40;
1700 } else if(BETWEEN(attr[i], 90, 97)) {
1701 term.c.attr.fg = attr[i] - 90 + 8;
1702 } else if(BETWEEN(attr[i], 100, 107)) {
1703 term.c.attr.bg = attr[i] - 100 + 8;
1704 } else {
1705 fprintf(stderr,
1706 "erresc(default): gfx attr %d unknown\n",
1707 attr[i]), csidump();
1708 }
1709 break;
1710 }
1711 }
1712 }
1713
1714 void
1715 tsetscroll(int t, int b) {
1716 int temp;
1717
1718 LIMIT(t, 0, term.row-1);
1719 LIMIT(b, 0, term.row-1);
1720 if(t > b) {
1721 temp = t;
1722 t = b;
1723 b = temp;
1724 }
1725 term.top = t;
1726 term.bot = b;
1727 }
1728
1729 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1730
1731 void
1732 tsetmode(bool priv, bool set, int *args, int narg) {
1733 int *lim, mode;
1734 bool alt;
1735
1736 for(lim = args + narg; args < lim; ++args) {
1737 if(priv) {
1738 switch(*args) {
1739 break;
1740 case 1: /* DECCKM -- Cursor key */
1741 MODBIT(term.mode, set, MODE_APPCURSOR);
1742 break;
1743 case 5: /* DECSCNM -- Reverse video */
1744 mode = term.mode;
1745 MODBIT(term.mode, set, MODE_REVERSE);
1746 if(mode != term.mode)
1747 redraw(REDRAW_TIMEOUT);
1748 break;
1749 case 6: /* DECOM -- Origin */
1750 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1751 tmoveato(0, 0);
1752 break;
1753 case 7: /* DECAWM -- Auto wrap */
1754 MODBIT(term.mode, set, MODE_WRAP);
1755 break;
1756 case 0: /* Error (IGNORED) */
1757 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1758 case 3: /* DECCOLM -- Column (IGNORED) */
1759 case 4: /* DECSCLM -- Scroll (IGNORED) */
1760 case 8: /* DECARM -- Auto repeat (IGNORED) */
1761 case 18: /* DECPFF -- Printer feed (IGNORED) */
1762 case 19: /* DECPEX -- Printer extent (IGNORED) */
1763 case 42: /* DECNRCM -- National characters (IGNORED) */
1764 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1765 break;
1766 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1767 MODBIT(term.mode, !set, MODE_HIDE);
1768 break;
1769 case 1000: /* 1000,1002: enable xterm mouse report */
1770 MODBIT(term.mode, set, MODE_MOUSEBTN);
1771 MODBIT(term.mode, 0, MODE_MOUSEMOTION);
1772 break;
1773 case 1002:
1774 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1775 MODBIT(term.mode, 0, MODE_MOUSEBTN);
1776 break;
1777 case 1006:
1778 MODBIT(term.mode, set, MODE_MOUSESGR);
1779 break;
1780 case 1034:
1781 MODBIT(term.mode, set, MODE_8BIT);
1782 break;
1783 case 1049: /* = 1047 and 1048 */
1784 case 47:
1785 case 1047:
1786 if (!allowaltscreen)
1787 break;
1788
1789 alt = IS_SET(MODE_ALTSCREEN);
1790 if(alt) {
1791 tclearregion(0, 0, term.col-1,
1792 term.row-1);
1793 }
1794 if(set ^ alt) /* set is always 1 or 0 */
1795 tswapscreen();
1796 if(*args != 1049)
1797 break;
1798 /* FALLTRU */
1799 case 1048:
1800 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1801 break;
1802 default:
1803 fprintf(stderr,
1804 "erresc: unknown private set/reset mode %d\n",
1805 *args);
1806 break;
1807 }
1808 } else {
1809 switch(*args) {
1810 case 0: /* Error (IGNORED) */
1811 break;
1812 case 2: /* KAM -- keyboard action */
1813 MODBIT(term.mode, set, MODE_KBDLOCK);
1814 break;
1815 case 4: /* IRM -- Insertion-replacement */
1816 MODBIT(term.mode, set, MODE_INSERT);
1817 break;
1818 case 12: /* SRM -- Send/Receive */
1819 MODBIT(term.mode, !set, MODE_ECHO);
1820 break;
1821 case 20: /* LNM -- Linefeed/new line */
1822 MODBIT(term.mode, set, MODE_CRLF);
1823 break;
1824 default:
1825 fprintf(stderr,
1826 "erresc: unknown set/reset mode %d\n",
1827 *args);
1828 break;
1829 }
1830 }
1831 }
1832 }
1833 #undef MODBIT
1834
1835
1836 void
1837 csihandle(void) {
1838 switch(csiescseq.mode) {
1839 default:
1840 unknown:
1841 fprintf(stderr, "erresc: unknown csi ");
1842 csidump();
1843 /* die(""); */
1844 break;
1845 case '@': /* ICH -- Insert <n> blank char */
1846 DEFAULT(csiescseq.arg[0], 1);
1847 tinsertblank(csiescseq.arg[0]);
1848 break;
1849 case 'A': /* CUU -- Cursor <n> Up */
1850 DEFAULT(csiescseq.arg[0], 1);
1851 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1852 break;
1853 case 'B': /* CUD -- Cursor <n> Down */
1854 case 'e': /* VPR --Cursor <n> Down */
1855 DEFAULT(csiescseq.arg[0], 1);
1856 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1857 break;
1858 case 'c': /* DA -- Device Attributes */
1859 if(csiescseq.arg[0] == 0)
1860 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1861 break;
1862 case 'C': /* CUF -- Cursor <n> Forward */
1863 case 'a': /* HPR -- Cursor <n> Forward */
1864 DEFAULT(csiescseq.arg[0], 1);
1865 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1866 break;
1867 case 'D': /* CUB -- Cursor <n> Backward */
1868 DEFAULT(csiescseq.arg[0], 1);
1869 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1870 break;
1871 case 'E': /* CNL -- Cursor <n> Down and first col */
1872 DEFAULT(csiescseq.arg[0], 1);
1873 tmoveto(0, term.c.y+csiescseq.arg[0]);
1874 break;
1875 case 'F': /* CPL -- Cursor <n> Up and first col */
1876 DEFAULT(csiescseq.arg[0], 1);
1877 tmoveto(0, term.c.y-csiescseq.arg[0]);
1878 break;
1879 case 'g': /* TBC -- Tabulation clear */
1880 switch(csiescseq.arg[0]) {
1881 case 0: /* clear current tab stop */
1882 term.tabs[term.c.x] = 0;
1883 break;
1884 case 3: /* clear all the tabs */
1885 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1886 break;
1887 default:
1888 goto unknown;
1889 }
1890 break;
1891 case 'G': /* CHA -- Move to <col> */
1892 case '`': /* HPA */
1893 DEFAULT(csiescseq.arg[0], 1);
1894 tmoveto(csiescseq.arg[0]-1, term.c.y);
1895 break;
1896 case 'H': /* CUP -- Move to <row> <col> */
1897 case 'f': /* HVP */
1898 DEFAULT(csiescseq.arg[0], 1);
1899 DEFAULT(csiescseq.arg[1], 1);
1900 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1901 break;
1902 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1903 DEFAULT(csiescseq.arg[0], 1);
1904 while(csiescseq.arg[0]--)
1905 tputtab(1);
1906 break;
1907 case 'J': /* ED -- Clear screen */
1908 sel.bx = -1;
1909 switch(csiescseq.arg[0]) {
1910 case 0: /* below */
1911 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1912 if(term.c.y < term.row-1) {
1913 tclearregion(0, term.c.y+1, term.col-1,
1914 term.row-1);
1915 }
1916 break;
1917 case 1: /* above */
1918 if(term.c.y > 1)
1919 tclearregion(0, 0, term.col-1, term.c.y-1);
1920 tclearregion(0, term.c.y, term.c.x, term.c.y);
1921 break;
1922 case 2: /* all */
1923 tclearregion(0, 0, term.col-1, term.row-1);
1924 break;
1925 default:
1926 goto unknown;
1927 }
1928 break;
1929 case 'K': /* EL -- Clear line */
1930 switch(csiescseq.arg[0]) {
1931 case 0: /* right */
1932 tclearregion(term.c.x, term.c.y, term.col-1,
1933 term.c.y);
1934 break;
1935 case 1: /* left */
1936 tclearregion(0, term.c.y, term.c.x, term.c.y);
1937 break;
1938 case 2: /* all */
1939 tclearregion(0, term.c.y, term.col-1, term.c.y);
1940 break;
1941 }
1942 break;
1943 case 'S': /* SU -- Scroll <n> line up */
1944 DEFAULT(csiescseq.arg[0], 1);
1945 tscrollup(term.top, csiescseq.arg[0]);
1946 break;
1947 case 'T': /* SD -- Scroll <n> line down */
1948 DEFAULT(csiescseq.arg[0], 1);
1949 tscrolldown(term.top, csiescseq.arg[0]);
1950 break;
1951 case 'L': /* IL -- Insert <n> blank lines */
1952 DEFAULT(csiescseq.arg[0], 1);
1953 tinsertblankline(csiescseq.arg[0]);
1954 break;
1955 case 'l': /* RM -- Reset Mode */
1956 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
1957 break;
1958 case 'M': /* DL -- Delete <n> lines */
1959 DEFAULT(csiescseq.arg[0], 1);
1960 tdeleteline(csiescseq.arg[0]);
1961 break;
1962 case 'X': /* ECH -- Erase <n> char */
1963 DEFAULT(csiescseq.arg[0], 1);
1964 tclearregion(term.c.x, term.c.y,
1965 term.c.x + csiescseq.arg[0] - 1, term.c.y);
1966 break;
1967 case 'P': /* DCH -- Delete <n> char */
1968 DEFAULT(csiescseq.arg[0], 1);
1969 tdeletechar(csiescseq.arg[0]);
1970 break;
1971 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
1972 DEFAULT(csiescseq.arg[0], 1);
1973 while(csiescseq.arg[0]--)
1974 tputtab(0);
1975 break;
1976 case 'd': /* VPA -- Move to <row> */
1977 DEFAULT(csiescseq.arg[0], 1);
1978 tmoveato(term.c.x, csiescseq.arg[0]-1);
1979 break;
1980 case 'h': /* SM -- Set terminal mode */
1981 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
1982 break;
1983 case 'm': /* SGR -- Terminal attribute (color) */
1984 tsetattr(csiescseq.arg, csiescseq.narg);
1985 break;
1986 case 'r': /* DECSTBM -- Set Scrolling Region */
1987 if(csiescseq.priv) {
1988 goto unknown;
1989 } else {
1990 DEFAULT(csiescseq.arg[0], 1);
1991 DEFAULT(csiescseq.arg[1], term.row);
1992 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
1993 tmoveato(0, 0);
1994 }
1995 break;
1996 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1997 tcursor(CURSOR_SAVE);
1998 break;
1999 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
2000 tcursor(CURSOR_LOAD);
2001 break;
2002 }
2003 }
2004
2005 void
2006 csidump(void) {
2007 int i;
2008 uint c;
2009
2010 printf("ESC[");
2011 for(i = 0; i < csiescseq.len; i++) {
2012 c = csiescseq.buf[i] & 0xff;
2013 if(isprint(c)) {
2014 putchar(c);
2015 } else if(c == '\n') {
2016 printf("(\\n)");
2017 } else if(c == '\r') {
2018 printf("(\\r)");
2019 } else if(c == 0x1b) {
2020 printf("(\\e)");
2021 } else {
2022 printf("(%02x)", c);
2023 }
2024 }
2025 putchar('\n');
2026 }
2027
2028 void
2029 csireset(void) {
2030 memset(&csiescseq, 0, sizeof(csiescseq));
2031 }
2032
2033 void
2034 strhandle(void) {
2035 char *p = NULL;
2036 int i, j, narg;
2037
2038 strparse();
2039 narg = strescseq.narg;
2040
2041 switch(strescseq.type) {
2042 case ']': /* OSC -- Operating System Command */
2043 switch(i = atoi(strescseq.args[0])) {
2044 case 0:
2045 case 1:
2046 case 2:
2047 if(narg > 1)
2048 xsettitle(strescseq.args[1]);
2049 break;
2050 case 4: /* color set */
2051 if(narg < 3)
2052 break;
2053 p = strescseq.args[2];
2054 /* fall through */
2055 case 104: /* color reset, here p = NULL */
2056 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2057 if (!xsetcolorname(j, p)) {
2058 fprintf(stderr, "erresc: invalid color %s\n", p);
2059 } else {
2060 /*
2061 * TODO if defaultbg color is changed, borders
2062 * are dirty
2063 */
2064 redraw(0);
2065 }
2066 break;
2067 default:
2068 fprintf(stderr, "erresc: unknown str ");
2069 strdump();
2070 break;
2071 }
2072 break;
2073 case 'k': /* old title set compatibility */
2074 xsettitle(strescseq.args[0]);
2075 break;
2076 case 'P': /* DSC -- Device Control String */
2077 case '_': /* APC -- Application Program Command */
2078 case '^': /* PM -- Privacy Message */
2079 default:
2080 fprintf(stderr, "erresc: unknown str ");
2081 strdump();
2082 /* die(""); */
2083 break;
2084 }
2085 }
2086
2087 void
2088 strparse(void) {
2089 char *p = strescseq.buf;
2090
2091 strescseq.narg = 0;
2092 strescseq.buf[strescseq.len] = '\0';
2093 while(p && strescseq.narg < STR_ARG_SIZ)
2094 strescseq.args[strescseq.narg++] = strsep(&p, ";");
2095 }
2096
2097 void
2098 strdump(void) {
2099 int i;
2100 uint c;
2101
2102 printf("ESC%c", strescseq.type);
2103 for(i = 0; i < strescseq.len; i++) {
2104 c = strescseq.buf[i] & 0xff;
2105 if(c == '\0') {
2106 return;
2107 } else if(isprint(c)) {
2108 putchar(c);
2109 } else if(c == '\n') {
2110 printf("(\\n)");
2111 } else if(c == '\r') {
2112 printf("(\\r)");
2113 } else if(c == 0x1b) {
2114 printf("(\\e)");
2115 } else {
2116 printf("(%02x)", c);
2117 }
2118 }
2119 printf("ESC\\\n");
2120 }
2121
2122 void
2123 strreset(void) {
2124 memset(&strescseq, 0, sizeof(strescseq));
2125 }
2126
2127 void
2128 tputtab(bool forward) {
2129 uint x = term.c.x;
2130
2131 if(forward) {
2132 if(x == term.col)
2133 return;
2134 for(++x; x < term.col && !term.tabs[x]; ++x)
2135 /* nothing */ ;
2136 } else {
2137 if(x == 0)
2138 return;
2139 for(--x; x > 0 && !term.tabs[x]; --x)
2140 /* nothing */ ;
2141 }
2142 tmoveto(x, term.c.y);
2143 }
2144
2145 void
2146 techo(char *buf, int len) {
2147 for(; len > 0; buf++, len--) {
2148 char c = *buf;
2149
2150 if(c == '\033') { /* escape */
2151 tputc("^", 1);
2152 tputc("[", 1);
2153 } else if(c < '\x20') { /* control code */
2154 if(c != '\n' && c != '\r' && c != '\t') {
2155 c |= '\x40';
2156 tputc("^", 1);
2157 }
2158 tputc(&c, 1);
2159 } else {
2160 break;
2161 }
2162 }
2163 if(len)
2164 tputc(buf, len);
2165 }
2166
2167 void
2168 tputc(char *c, int len) {
2169 uchar ascii = *c;
2170 bool control = ascii < '\x20' || ascii == 0177;
2171
2172 if(iofd != -1) {
2173 if(xwrite(iofd, c, len) < 0) {
2174 fprintf(stderr, "Error writing in %s:%s\n",
2175 opt_io, strerror(errno));
2176 close(iofd);
2177 iofd = -1;
2178 }
2179 }
2180
2181 /*
2182 * STR sequences must be checked before anything else
2183 * because it can use some control codes as part of the sequence.
2184 */
2185 if(term.esc & ESC_STR) {
2186 switch(ascii) {
2187 case '\033':
2188 term.esc = ESC_START | ESC_STR_END;
2189 break;
2190 case '\a': /* backwards compatibility to xterm */
2191 term.esc = 0;
2192 strhandle();
2193 break;
2194 default:
2195 if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2196 memmove(&strescseq.buf[strescseq.len], c, len);
2197 strescseq.len += len;
2198 } else {
2199 /*
2200 * Here is a bug in terminals. If the user never sends
2201 * some code to stop the str or esc command, then st
2202 * will stop responding. But this is better than
2203 * silently failing with unknown characters. At least
2204 * then users will report back.
2205 *
2206 * In the case users ever get fixed, here is the code:
2207 */
2208 /*
2209 * term.esc = 0;
2210 * strhandle();
2211 */
2212 }
2213 }
2214 return;
2215 }
2216
2217 /*
2218 * Actions of control codes must be performed as soon they arrive
2219 * because they can be embedded inside a control sequence, and
2220 * they must not cause conflicts with sequences.
2221 */
2222 if(control) {
2223 switch(ascii) {
2224 case '\t': /* HT */
2225 tputtab(1);
2226 return;
2227 case '\b': /* BS */
2228 tmoveto(term.c.x-1, term.c.y);
2229 return;
2230 case '\r': /* CR */
2231 tmoveto(0, term.c.y);
2232 return;
2233 case '\f': /* LF */
2234 case '\v': /* VT */
2235 case '\n': /* LF */
2236 /* go to first col if the mode is set */
2237 tnewline(IS_SET(MODE_CRLF));
2238 return;
2239 case '\a': /* BEL */
2240 if(!(xw.state & WIN_FOCUSED))
2241 xseturgency(1);
2242 return;
2243 case '\033': /* ESC */
2244 csireset();
2245 term.esc = ESC_START;
2246 return;
2247 case '\016': /* SO */
2248 case '\017': /* SI */
2249 /*
2250 * Different charsets are hard to handle. Applications
2251 * should use the right alt charset escapes for the
2252 * only reason they still exist: line drawing. The
2253 * rest is incompatible history st should not support.
2254 */
2255 return;
2256 case '\032': /* SUB */
2257 case '\030': /* CAN */
2258 csireset();
2259 return;
2260 case '\005': /* ENQ (IGNORED) */
2261 case '\000': /* NUL (IGNORED) */
2262 case '\021': /* XON (IGNORED) */
2263 case '\023': /* XOFF (IGNORED) */
2264 case 0177: /* DEL (IGNORED) */
2265 return;
2266 }
2267 } else if(term.esc & ESC_START) {
2268 if(term.esc & ESC_CSI) {
2269 csiescseq.buf[csiescseq.len++] = ascii;
2270 if(BETWEEN(ascii, 0x40, 0x7E)
2271 || csiescseq.len >= \
2272 sizeof(csiescseq.buf)-1) {
2273 term.esc = 0;
2274 csiparse();
2275 csihandle();
2276 }
2277 } else if(term.esc & ESC_STR_END) {
2278 term.esc = 0;
2279 if(ascii == '\\')
2280 strhandle();
2281 } else if(term.esc & ESC_ALTCHARSET) {
2282 switch(ascii) {
2283 case '0': /* Line drawing set */
2284 term.c.attr.mode |= ATTR_GFX;
2285 break;
2286 case 'B': /* USASCII */
2287 term.c.attr.mode &= ~ATTR_GFX;
2288 break;
2289 case 'A': /* UK (IGNORED) */
2290 case '<': /* multinational charset (IGNORED) */
2291 case '5': /* Finnish (IGNORED) */
2292 case 'C': /* Finnish (IGNORED) */
2293 case 'K': /* German (IGNORED) */
2294 break;
2295 default:
2296 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2297 }
2298 term.esc = 0;
2299 } else if(term.esc & ESC_TEST) {
2300 if(ascii == '8') { /* DEC screen alignment test. */
2301 char E[UTF_SIZ] = "E";
2302 int x, y;
2303
2304 for(x = 0; x < term.col; ++x) {
2305 for(y = 0; y < term.row; ++y)
2306 tsetchar(E, &term.c.attr, x, y);
2307 }
2308 }
2309 term.esc = 0;
2310 } else {
2311 switch(ascii) {
2312 case '[':
2313 term.esc |= ESC_CSI;
2314 break;
2315 case '#':
2316 term.esc |= ESC_TEST;
2317 break;
2318 case 'P': /* DCS -- Device Control String */
2319 case '_': /* APC -- Application Program Command */
2320 case '^': /* PM -- Privacy Message */
2321 case ']': /* OSC -- Operating System Command */
2322 case 'k': /* old title set compatibility */
2323 strreset();
2324 strescseq.type = ascii;
2325 term.esc |= ESC_STR;
2326 break;
2327 case '(': /* set primary charset G0 */
2328 term.esc |= ESC_ALTCHARSET;
2329 break;
2330 case ')': /* set secondary charset G1 (IGNORED) */
2331 case '*': /* set tertiary charset G2 (IGNORED) */
2332 case '+': /* set quaternary charset G3 (IGNORED) */
2333 term.esc = 0;
2334 break;
2335 case 'D': /* IND -- Linefeed */
2336 if(term.c.y == term.bot) {
2337 tscrollup(term.top, 1);
2338 } else {
2339 tmoveto(term.c.x, term.c.y+1);
2340 }
2341 term.esc = 0;
2342 break;
2343 case 'E': /* NEL -- Next line */
2344 tnewline(1); /* always go to first col */
2345 term.esc = 0;
2346 break;
2347 case 'H': /* HTS -- Horizontal tab stop */
2348 term.tabs[term.c.x] = 1;
2349 term.esc = 0;
2350 break;
2351 case 'M': /* RI -- Reverse index */
2352 if(term.c.y == term.top) {
2353 tscrolldown(term.top, 1);
2354 } else {
2355 tmoveto(term.c.x, term.c.y-1);
2356 }
2357 term.esc = 0;
2358 break;
2359 case 'Z': /* DECID -- Identify Terminal */
2360 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2361 term.esc = 0;
2362 break;
2363 case 'c': /* RIS -- Reset to inital state */
2364 treset();
2365 term.esc = 0;
2366 xresettitle();
2367 break;
2368 case '=': /* DECPAM -- Application keypad */
2369 term.mode |= MODE_APPKEYPAD;
2370 term.esc = 0;
2371 break;
2372 case '>': /* DECPNM -- Normal keypad */
2373 term.mode &= ~MODE_APPKEYPAD;
2374 term.esc = 0;
2375 break;
2376 case '7': /* DECSC -- Save Cursor */
2377 tcursor(CURSOR_SAVE);
2378 term.esc = 0;
2379 break;
2380 case '8': /* DECRC -- Restore Cursor */
2381 tcursor(CURSOR_LOAD);
2382 term.esc = 0;
2383 break;
2384 case '\\': /* ST -- Stop */
2385 term.esc = 0;
2386 break;
2387 default:
2388 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2389 (uchar) ascii, isprint(ascii)? ascii:'.');
2390 term.esc = 0;
2391 }
2392 }
2393 /*
2394 * All characters which form part of a sequence are not
2395 * printed
2396 */
2397 return;
2398 }
2399 /*
2400 * Display control codes only if we are in graphic mode
2401 */
2402 if(control && !(term.c.attr.mode & ATTR_GFX))
2403 return;
2404 if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
2405 sel.bx = -1;
2406 if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2407 term.line[term.c.y][term.c.x].mode |= ATTR_WRAP;
2408 tnewline(1);
2409 }
2410
2411 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col) {
2412 memmove(&term.line[term.c.y][term.c.x+1],
2413 &term.line[term.c.y][term.c.x],
2414 (term.col - term.c.x - 1) * sizeof(Glyph));
2415 }
2416
2417 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2418 if(term.c.x+1 < term.col) {
2419 tmoveto(term.c.x+1, term.c.y);
2420 } else {
2421 term.c.state |= CURSOR_WRAPNEXT;
2422 }
2423 }
2424
2425 int
2426 tresize(int col, int row) {
2427 int i;
2428 int minrow = MIN(row, term.row);
2429 int mincol = MIN(col, term.col);
2430 int slide = term.c.y - row + 1;
2431 bool *bp;
2432 Line *orig;
2433
2434 if(col < 1 || row < 1)
2435 return 0;
2436
2437 /* free unneeded rows */
2438 i = 0;
2439 if(slide > 0) {
2440 /*
2441 * slide screen to keep cursor where we expect it -
2442 * tscrollup would work here, but we can optimize to
2443 * memmove because we're freeing the earlier lines
2444 */
2445 for(/* i = 0 */; i < slide; i++) {
2446 free(term.line[i]);
2447 free(term.alt[i]);
2448 }
2449 memmove(term.line, term.line + slide, row * sizeof(Line));
2450 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2451 }
2452 for(i += row; i < term.row; i++) {
2453 free(term.line[i]);
2454 free(term.alt[i]);
2455 }
2456
2457 /* resize to new height */
2458 term.line = xrealloc(term.line, row * sizeof(Line));
2459 term.alt = xrealloc(term.alt, row * sizeof(Line));
2460 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2461 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2462
2463 /* resize each row to new width, zero-pad if needed */
2464 for(i = 0; i < minrow; i++) {
2465 term.dirty[i] = 1;
2466 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2467 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2468 }
2469
2470 /* allocate any new rows */
2471 for(/* i == minrow */; i < row; i++) {
2472 term.dirty[i] = 1;
2473 term.line[i] = xcalloc(col, sizeof(Glyph));
2474 term.alt [i] = xcalloc(col, sizeof(Glyph));
2475 }
2476 if(col > term.col) {
2477 bp = term.tabs + term.col;
2478
2479 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2480 while(--bp > term.tabs && !*bp)
2481 /* nothing */ ;
2482 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2483 *bp = 1;
2484 }
2485 /* update terminal size */
2486 term.col = col;
2487 term.row = row;
2488 /* reset scrolling region */
2489 tsetscroll(0, row-1);
2490 /* make use of the LIMIT in tmoveto */
2491 tmoveto(term.c.x, term.c.y);
2492 /* Clearing both screens */
2493 orig = term.line;
2494 do {
2495 if(mincol < col && 0 < minrow) {
2496 tclearregion(mincol, 0, col - 1, minrow - 1);
2497 }
2498 if(0 < col && minrow < row) {
2499 tclearregion(0, minrow, col - 1, row - 1);
2500 }
2501 tswapscreen();
2502 } while(orig != term.line);
2503
2504 return (slide > 0);
2505 }
2506
2507 void
2508 xresize(int col, int row) {
2509 xw.tw = MAX(1, col * xw.cw);
2510 xw.th = MAX(1, row * xw.ch);
2511
2512 XFreePixmap(xw.dpy, xw.buf);
2513 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2514 DefaultDepth(xw.dpy, xw.scr));
2515 XftDrawChange(xw.draw, xw.buf);
2516 xclear(0, 0, xw.w, xw.h);
2517 }
2518
2519 static inline ushort
2520 sixd_to_16bit(int x) {
2521 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2522 }
2523
2524 void
2525 xloadcols(void) {
2526 int i, r, g, b;
2527 XRenderColor color = { .alpha = 0xffff };
2528
2529 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
2530 for(i = 0; i < LEN(colorname); i++) {
2531 if(!colorname[i])
2532 continue;
2533 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2534 die("Could not allocate color '%s'\n", colorname[i]);
2535 }
2536 }
2537
2538 /* load colors [16-255] ; same colors as xterm */
2539 for(i = 16, r = 0; r < 6; r++) {
2540 for(g = 0; g < 6; g++) {
2541 for(b = 0; b < 6; b++) {
2542 color.red = sixd_to_16bit(r);
2543 color.green = sixd_to_16bit(g);
2544 color.blue = sixd_to_16bit(b);
2545 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i])) {
2546 die("Could not allocate color %d\n", i);
2547 }
2548 i++;
2549 }
2550 }
2551 }
2552
2553 for(r = 0; r < 24; r++, i++) {
2554 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
2555 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color,
2556 &dc.col[i])) {
2557 die("Could not allocate color %d\n", i);
2558 }
2559 }
2560 }
2561
2562 int
2563 xsetcolorname(int x, const char *name) {
2564 XRenderColor color = { .alpha = 0xffff };
2565 Colour colour;
2566 if (x < 0 || x > LEN(colorname))
2567 return -1;
2568 if(!name) {
2569 if(16 <= x && x < 16 + 216) {
2570 int r = (x - 16) / 36, g = ((x - 16) % 36) / 6, b = (x - 16) % 6;
2571 color.red = sixd_to_16bit(r);
2572 color.green = sixd_to_16bit(g);
2573 color.blue = sixd_to_16bit(b);
2574 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2575 return 0; /* something went wrong */
2576 dc.col[x] = colour;
2577 return 1;
2578 } else if (16 + 216 <= x && x < 256) {
2579 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (x - (16 + 216));
2580 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2581 return 0; /* something went wrong */
2582 dc.col[x] = colour;
2583 return 1;
2584 } else {
2585 name = colorname[x];
2586 }
2587 }
2588 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &colour))
2589 return 0;
2590 dc.col[x] = colour;
2591 return 1;
2592 }
2593
2594 void
2595 xtermclear(int col1, int row1, int col2, int row2) {
2596 XftDrawRect(xw.draw,
2597 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2598 borderpx + col1 * xw.cw,
2599 borderpx + row1 * xw.ch,
2600 (col2-col1+1) * xw.cw,
2601 (row2-row1+1) * xw.ch);
2602 }
2603
2604 /*
2605 * Absolute coordinates.
2606 */
2607 void
2608 xclear(int x1, int y1, int x2, int y2) {
2609 XftDrawRect(xw.draw,
2610 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2611 x1, y1, x2-x1, y2-y1);
2612 }
2613
2614 void
2615 xhints(void) {
2616 XClassHint class = {opt_class ? opt_class : termname, termname};
2617 XWMHints wm = {.flags = InputHint, .input = 1};
2618 XSizeHints *sizeh = NULL;
2619
2620 sizeh = XAllocSizeHints();
2621 if(xw.isfixed == False) {
2622 sizeh->flags = PSize | PResizeInc | PBaseSize;
2623 sizeh->height = xw.h;
2624 sizeh->width = xw.w;
2625 sizeh->height_inc = xw.ch;
2626 sizeh->width_inc = xw.cw;
2627 sizeh->base_height = 2 * borderpx;
2628 sizeh->base_width = 2 * borderpx;
2629 } else {
2630 sizeh->flags = PMaxSize | PMinSize;
2631 sizeh->min_width = sizeh->max_width = xw.fw;
2632 sizeh->min_height = sizeh->max_height = xw.fh;
2633 }
2634
2635 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
2636 XFree(sizeh);
2637 }
2638
2639 int
2640 xloadfont(Font *f, FcPattern *pattern) {
2641 FcPattern *match;
2642 FcResult result;
2643
2644 match = FcFontMatch(NULL, pattern, &result);
2645 if(!match)
2646 return 1;
2647
2648 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2649 FcPatternDestroy(match);
2650 return 1;
2651 }
2652
2653 f->set = NULL;
2654 f->pattern = FcPatternDuplicate(pattern);
2655
2656 f->ascent = f->match->ascent;
2657 f->descent = f->match->descent;
2658 f->lbearing = 0;
2659 f->rbearing = f->match->max_advance_width;
2660
2661 f->height = f->ascent + f->descent;
2662 f->width = f->lbearing + f->rbearing;
2663
2664 return 0;
2665 }
2666
2667 void
2668 xloadfonts(char *fontstr, int fontsize) {
2669 FcPattern *pattern;
2670 FcResult result;
2671 double fontval;
2672
2673 if(fontstr[0] == '-') {
2674 pattern = XftXlfdParse(fontstr, False, False);
2675 } else {
2676 pattern = FcNameParse((FcChar8 *)fontstr);
2677 }
2678
2679 if(!pattern)
2680 die("st: can't open font %s\n", fontstr);
2681
2682 if(fontsize > 0) {
2683 FcPatternDel(pattern, FC_PIXEL_SIZE);
2684 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2685 usedfontsize = fontsize;
2686 } else {
2687 result = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2688 if(result == FcResultMatch) {
2689 usedfontsize = (int)fontval;
2690 } else {
2691 /*
2692 * Default font size is 12, if none given. This is to
2693 * have a known usedfontsize value.
2694 */
2695 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
2696 usedfontsize = 12;
2697 }
2698 }
2699
2700 FcConfigSubstitute(0, pattern, FcMatchPattern);
2701 FcDefaultSubstitute(pattern);
2702
2703 if(xloadfont(&dc.font, pattern))
2704 die("st: can't open font %s\n", fontstr);
2705
2706 /* Setting character width and height. */
2707 xw.cw = dc.font.width;
2708 xw.ch = dc.font.height;
2709
2710 FcPatternDel(pattern, FC_SLANT);
2711 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
2712 if(xloadfont(&dc.ifont, pattern))
2713 die("st: can't open font %s\n", fontstr);
2714
2715 FcPatternDel(pattern, FC_WEIGHT);
2716 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
2717 if(xloadfont(&dc.ibfont, pattern))
2718 die("st: can't open font %s\n", fontstr);
2719
2720 FcPatternDel(pattern, FC_SLANT);
2721 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
2722 if(xloadfont(&dc.bfont, pattern))
2723 die("st: can't open font %s\n", fontstr);
2724
2725 FcPatternDestroy(pattern);
2726 }
2727
2728 int
2729 xloadfontset(Font *f) {
2730 FcResult result;
2731
2732 if(!(f->set = FcFontSort(0, f->pattern, FcTrue, 0, &result)))
2733 return 1;
2734 return 0;
2735 }
2736
2737 void
2738 xunloadfont(Font *f) {
2739 XftFontClose(xw.dpy, f->match);
2740 FcPatternDestroy(f->pattern);
2741 if(f->set)
2742 FcFontSetDestroy(f->set);
2743 }
2744
2745 void
2746 xunloadfonts(void) {
2747 int i, ip;
2748
2749 /*
2750 * Free the loaded fonts in the font cache. This is done backwards
2751 * from the frccur.
2752 */
2753 for(i = 0, ip = frccur; i < frclen; i++, ip--) {
2754 if(ip < 0)
2755 ip = LEN(frc) - 1;
2756 XftFontClose(xw.dpy, frc[ip].font);
2757 }
2758 frccur = -1;
2759 frclen = 0;
2760
2761 xunloadfont(&dc.font);
2762 xunloadfont(&dc.bfont);
2763 xunloadfont(&dc.ifont);
2764 xunloadfont(&dc.ibfont);
2765 }
2766
2767 void
2768 xzoom(const Arg *arg) {
2769 xunloadfonts();
2770 xloadfonts(usedfont, usedfontsize + arg->i);
2771 cresize(0, 0);
2772 redraw(0);
2773 }
2774
2775 void
2776 xinit(void) {
2777 XSetWindowAttributes attrs;
2778 XGCValues gcvalues;
2779 Cursor cursor;
2780 Window parent;
2781 int sw, sh;
2782
2783 if(!(xw.dpy = XOpenDisplay(NULL)))
2784 die("Can't open display\n");
2785 xw.scr = XDefaultScreen(xw.dpy);
2786 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
2787
2788 /* font */
2789 if(!FcInit())
2790 die("Could not init fontconfig.\n");
2791
2792 usedfont = (opt_font == NULL)? font : opt_font;
2793 xloadfonts(usedfont, 0);
2794
2795 /* colors */
2796 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
2797 xloadcols();
2798
2799 /* adjust fixed window geometry */
2800 if(xw.isfixed) {
2801 sw = DisplayWidth(xw.dpy, xw.scr);
2802 sh = DisplayHeight(xw.dpy, xw.scr);
2803 if(xw.fx < 0)
2804 xw.fx = sw + xw.fx - xw.fw - 1;
2805 if(xw.fy < 0)
2806 xw.fy = sh + xw.fy - xw.fh - 1;
2807
2808 xw.h = xw.fh;
2809 xw.w = xw.fw;
2810 } else {
2811 /* window - default size */
2812 xw.h = 2 * borderpx + term.row * xw.ch;
2813 xw.w = 2 * borderpx + term.col * xw.cw;
2814 xw.fx = 0;
2815 xw.fy = 0;
2816 }
2817
2818 /* Events */
2819 attrs.background_pixel = dc.col[defaultbg].pixel;
2820 attrs.border_pixel = dc.col[defaultbg].pixel;
2821 attrs.bit_gravity = NorthWestGravity;
2822 attrs.event_mask = FocusChangeMask | KeyPressMask
2823 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
2824 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
2825 attrs.colormap = xw.cmap;
2826
2827 parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
2828 XRootWindow(xw.dpy, xw.scr);
2829 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
2830 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
2831 xw.vis,
2832 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
2833 | CWColormap,
2834 &attrs);
2835
2836 memset(&gcvalues, 0, sizeof(gcvalues));
2837 gcvalues.graphics_exposures = False;
2838 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
2839 &gcvalues);
2840 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2841 DefaultDepth(xw.dpy, xw.scr));
2842 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
2843 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
2844
2845 /* Xft rendering context */
2846 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
2847
2848 /* input methods */
2849 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2850 XSetLocaleModifiers("@im=local");
2851 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2852 XSetLocaleModifiers("@im=");
2853 if((xw.xim = XOpenIM(xw.dpy,
2854 NULL, NULL, NULL)) == NULL) {
2855 die("XOpenIM failed. Could not open input"
2856 " device.\n");
2857 }
2858 }
2859 }
2860 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
2861 | XIMStatusNothing, XNClientWindow, xw.win,
2862 XNFocusWindow, xw.win, NULL);
2863 if(xw.xic == NULL)
2864 die("XCreateIC failed. Could not obtain input method.\n");
2865
2866 /* white cursor, black outline */
2867 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
2868 XDefineCursor(xw.dpy, xw.win, cursor);
2869 XRecolorCursor(xw.dpy, cursor,
2870 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
2871 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
2872
2873 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
2874 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
2875 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
2876
2877 xresettitle();
2878 XMapWindow(xw.dpy, xw.win);
2879 xhints();
2880 XSync(xw.dpy, 0);
2881 }
2882
2883 void
2884 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
2885 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
2886 width = charlen * xw.cw, xp, i;
2887 int frp, frcflags;
2888 int u8fl, u8fblen, u8cblen, doesexist;
2889 char *u8c, *u8fs;
2890 long u8char;
2891 Font *font = &dc.font;
2892 FcResult fcres;
2893 FcPattern *fcpattern, *fontpattern;
2894 FcFontSet *fcsets[] = { NULL };
2895 FcCharSet *fccharset;
2896 Colour *fg, *bg, *temp, revfg, revbg;
2897 XRenderColor colfg, colbg;
2898 Rectangle r;
2899
2900 frcflags = FRC_NORMAL;
2901
2902 if(base.mode & ATTR_ITALIC) {
2903 if(base.fg == defaultfg)
2904 base.fg = defaultitalic;
2905 font = &dc.ifont;
2906 frcflags = FRC_ITALIC;
2907 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
2908 if(base.fg == defaultfg)
2909 base.fg = defaultitalic;
2910 font = &dc.ibfont;
2911 frcflags = FRC_ITALICBOLD;
2912 } else if(base.mode & ATTR_UNDERLINE) {
2913 if(base.fg == defaultfg)
2914 base.fg = defaultunderline;
2915 }
2916 fg = &dc.col[base.fg];
2917 bg = &dc.col[base.bg];
2918
2919 if(base.mode & ATTR_BOLD) {
2920 if(BETWEEN(base.fg, 0, 7)) {
2921 /* basic system colors */
2922 fg = &dc.col[base.fg + 8];
2923 } else if(BETWEEN(base.fg, 16, 195)) {
2924 /* 256 colors */
2925 fg = &dc.col[base.fg + 36];
2926 } else if(BETWEEN(base.fg, 232, 251)) {
2927 /* greyscale */
2928 fg = &dc.col[base.fg + 4];
2929 }
2930 /*
2931 * Those ranges will not be brightened:
2932 * 8 - 15 – bright system colors
2933 * 196 - 231 – highest 256 color cube
2934 * 252 - 255 – brightest colors in greyscale
2935 */
2936 font = &dc.bfont;
2937 frcflags = FRC_BOLD;
2938 }
2939
2940 if(IS_SET(MODE_REVERSE)) {
2941 if(fg == &dc.col[defaultfg]) {
2942 fg = &dc.col[defaultbg];
2943 } else {
2944 colfg.red = ~fg->color.red;
2945 colfg.green = ~fg->color.green;
2946 colfg.blue = ~fg->color.blue;
2947 colfg.alpha = fg->color.alpha;
2948 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
2949 fg = &revfg;
2950 }
2951
2952 if(bg == &dc.col[defaultbg]) {
2953 bg = &dc.col[defaultfg];
2954 } else {
2955 colbg.red = ~bg->color.red;
2956 colbg.green = ~bg->color.green;
2957 colbg.blue = ~bg->color.blue;
2958 colbg.alpha = bg->color.alpha;
2959 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &revbg);
2960 bg = &revbg;
2961 }
2962 }
2963
2964 if(base.mode & ATTR_REVERSE) {
2965 temp = fg;
2966 fg = bg;
2967 bg = temp;
2968 }
2969
2970 if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
2971 fg = bg;
2972
2973 /* Intelligent cleaning up of the borders. */
2974 if(x == 0) {
2975 xclear(0, (y == 0)? 0 : winy, borderpx,
2976 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
2977 }
2978 if(x + charlen >= term.col) {
2979 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
2980 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
2981 }
2982 if(y == 0)
2983 xclear(winx, 0, winx + width, borderpx);
2984 if(y == term.row-1)
2985 xclear(winx, winy + xw.ch, winx + width, xw.h);
2986
2987 /* Clean up the region we want to draw to. */
2988 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
2989
2990 /* Set the clip region because Xft is sometimes dirty. */
2991 r.x = 0;
2992 r.y = 0;
2993 r.height = xw.ch;
2994 r.width = width;
2995 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
2996
2997 for(xp = winx; bytelen > 0;) {
2998 /*
2999 * Search for the range in the to be printed string of glyphs
3000 * that are in the main font. Then print that range. If
3001 * some glyph is found that is not in the font, do the
3002 * fallback dance.
3003 */
3004 u8fs = s;
3005 u8fblen = 0;
3006 u8fl = 0;
3007 for(;;) {
3008 u8c = s;
3009 u8cblen = utf8decode(s, &u8char);
3010 s += u8cblen;
3011 bytelen -= u8cblen;
3012
3013 doesexist = XftCharIndex(xw.dpy, font->match, u8char);
3014 if(!doesexist || bytelen <= 0) {
3015 if(bytelen <= 0) {
3016 if(doesexist) {
3017 u8fl++;
3018 u8fblen += u8cblen;
3019 }
3020 }
3021
3022 if(u8fl > 0) {
3023 XftDrawStringUtf8(xw.draw, fg,
3024 font->match, xp,
3025 winy + font->ascent,
3026 (FcChar8 *)u8fs,
3027 u8fblen);
3028 xp += font->width * u8fl;
3029
3030 }
3031 break;
3032 }
3033
3034 u8fl++;
3035 u8fblen += u8cblen;
3036 }
3037 if(doesexist)
3038 break;
3039
3040 frp = frccur;
3041 /* Search the font cache. */
3042 for(i = 0; i < frclen; i++, frp--) {
3043 if(frp <= 0)
3044 frp = LEN(frc) - 1;
3045
3046 if(frc[frp].c == u8char
3047 && frc[frp].flags == frcflags) {
3048 break;
3049 }
3050 }
3051
3052 /* Nothing was found. */
3053 if(i >= frclen) {
3054 if(!font->set)
3055 xloadfontset(font);
3056 fcsets[0] = font->set;
3057
3058 /*
3059 * Nothing was found in the cache. Now use
3060 * some dozen of Fontconfig calls to get the
3061 * font for one single character.
3062 */
3063 fcpattern = FcPatternDuplicate(font->pattern);
3064 fccharset = FcCharSetCreate();
3065
3066 FcCharSetAddChar(fccharset, u8char);
3067 FcPatternAddCharSet(fcpattern, FC_CHARSET,
3068 fccharset);
3069 FcPatternAddBool(fcpattern, FC_SCALABLE,
3070 FcTrue);
3071
3072 FcConfigSubstitute(0, fcpattern,
3073 FcMatchPattern);
3074 FcDefaultSubstitute(fcpattern);
3075
3076 fontpattern = FcFontSetMatch(0, fcsets,
3077 FcTrue, fcpattern, &fcres);
3078
3079 /*
3080 * Overwrite or create the new cache entry.
3081 */
3082 frccur++;
3083 frclen++;
3084 if(frccur >= LEN(frc))
3085 frccur = 0;
3086 if(frclen > LEN(frc)) {
3087 frclen = LEN(frc);
3088 XftFontClose(xw.dpy, frc[frccur].font);
3089 }
3090
3091 frc[frccur].font = XftFontOpenPattern(xw.dpy,
3092 fontpattern);
3093 frc[frccur].c = u8char;
3094 frc[frccur].flags = frcflags;
3095
3096 FcPatternDestroy(fcpattern);
3097 FcCharSetDestroy(fccharset);
3098
3099 frp = frccur;
3100 }
3101
3102 XftDrawStringUtf8(xw.draw, fg, frc[frp].font,
3103 xp, winy + frc[frp].font->ascent,
3104 (FcChar8 *)u8c, u8cblen);
3105
3106 xp += font->width;
3107 }
3108
3109 /*
3110 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
3111 winy + font->ascent, (FcChar8 *)s, bytelen);
3112 */
3113
3114 if(base.mode & ATTR_UNDERLINE) {
3115 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
3116 width, 1);
3117 }
3118
3119 /* Reset clip to none. */
3120 XftDrawSetClip(xw.draw, 0);
3121 }
3122
3123 void
3124 xdrawcursor(void) {
3125 static int oldx = 0, oldy = 0;
3126 int sl;
3127 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
3128
3129 LIMIT(oldx, 0, term.col-1);
3130 LIMIT(oldy, 0, term.row-1);
3131
3132 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
3133
3134 /* remove the old cursor */
3135 sl = utf8size(term.line[oldy][oldx].c);
3136 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
3137 oldy, 1, sl);
3138
3139 /* draw the new one */
3140 if(!(IS_SET(MODE_HIDE))) {
3141 if(xw.state & WIN_FOCUSED) {
3142 if(IS_SET(MODE_REVERSE)) {
3143 g.mode |= ATTR_REVERSE;
3144 g.fg = defaultcs;
3145 g.bg = defaultfg;
3146 }
3147
3148 sl = utf8size(g.c);
3149 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
3150 } else {
3151 XftDrawRect(xw.draw, &dc.col[defaultcs],
3152 borderpx + term.c.x * xw.cw,
3153 borderpx + term.c.y * xw.ch,
3154 xw.cw - 1, 1);
3155 XftDrawRect(xw.draw, &dc.col[defaultcs],
3156 borderpx + term.c.x * xw.cw,
3157 borderpx + term.c.y * xw.ch,
3158 1, xw.ch - 1);
3159 XftDrawRect(xw.draw, &dc.col[defaultcs],
3160 borderpx + (term.c.x + 1) * xw.cw - 1,
3161 borderpx + term.c.y * xw.ch,
3162 1, xw.ch - 1);
3163 XftDrawRect(xw.draw, &dc.col[defaultcs],
3164 borderpx + term.c.x * xw.cw,
3165 borderpx + (term.c.y + 1) * xw.ch - 1,
3166 xw.cw, 1);
3167 }
3168 oldx = term.c.x, oldy = term.c.y;
3169 }
3170 }
3171
3172
3173 void
3174 xsettitle(char *p) {
3175 XTextProperty prop;
3176
3177 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3178 &prop);
3179 XSetWMName(xw.dpy, xw.win, &prop);
3180 }
3181
3182 void
3183 xresettitle(void) {
3184 xsettitle(opt_title ? opt_title : "st");
3185 }
3186
3187 void
3188 redraw(int timeout) {
3189 struct timespec tv = {0, timeout * 1000};
3190
3191 tfulldirt();
3192 draw();
3193
3194 if(timeout > 0) {
3195 nanosleep(&tv, NULL);
3196 XSync(xw.dpy, False); /* necessary for a good tput flash */
3197 }
3198 }
3199
3200 void
3201 draw(void) {
3202 drawregion(0, 0, term.col, term.row);
3203 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3204 xw.h, 0, 0);
3205 XSetForeground(xw.dpy, dc.gc,
3206 dc.col[IS_SET(MODE_REVERSE)?
3207 defaultfg : defaultbg].pixel);
3208 }
3209
3210 void
3211 drawregion(int x1, int y1, int x2, int y2) {
3212 int ic, ib, x, y, ox, sl;
3213 Glyph base, new;
3214 char buf[DRAW_BUF_SIZ];
3215 bool ena_sel = sel.bx != -1;
3216
3217 if(sel.alt ^ IS_SET(MODE_ALTSCREEN))
3218 ena_sel = 0;
3219
3220 if(!(xw.state & WIN_VISIBLE))
3221 return;
3222
3223 for(y = y1; y < y2; y++) {
3224 if(!term.dirty[y])
3225 continue;
3226
3227 xtermclear(0, y, term.col, y);
3228 term.dirty[y] = 0;
3229 base = term.line[y][0];
3230 ic = ib = ox = 0;
3231 for(x = x1; x < x2; x++) {
3232 new = term.line[y][x];
3233 if(ena_sel && selected(x, y))
3234 new.mode ^= ATTR_REVERSE;
3235 if(ib > 0 && (ATTRCMP(base, new)
3236 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3237 xdraws(buf, base, ox, y, ic, ib);
3238 ic = ib = 0;
3239 }
3240 if(ib == 0) {
3241 ox = x;
3242 base = new;
3243 }
3244
3245 sl = utf8size(new.c);
3246 memcpy(buf+ib, new.c, sl);
3247 ib += sl;
3248 ++ic;
3249 }
3250 if(ib > 0)
3251 xdraws(buf, base, ox, y, ic, ib);
3252 }
3253 xdrawcursor();
3254 }
3255
3256 void
3257 expose(XEvent *ev) {
3258 XExposeEvent *e = &ev->xexpose;
3259
3260 if(xw.state & WIN_REDRAW) {
3261 if(!e->count)
3262 xw.state &= ~WIN_REDRAW;
3263 }
3264 redraw(0);
3265 }
3266
3267 void
3268 visibility(XEvent *ev) {
3269 XVisibilityEvent *e = &ev->xvisibility;
3270
3271 if(e->state == VisibilityFullyObscured) {
3272 xw.state &= ~WIN_VISIBLE;
3273 } else if(!(xw.state & WIN_VISIBLE)) {
3274 /* need a full redraw for next Expose, not just a buf copy */
3275 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3276 }
3277 }
3278
3279 void
3280 unmap(XEvent *ev) {
3281 xw.state &= ~WIN_VISIBLE;
3282 }
3283
3284 void
3285 xseturgency(int add) {
3286 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3287
3288 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
3289 XSetWMHints(xw.dpy, xw.win, h);
3290 XFree(h);
3291 }
3292
3293 void
3294 focus(XEvent *ev) {
3295 XFocusChangeEvent *e = &ev->xfocus;
3296
3297 if(e->mode == NotifyGrab)
3298 return;
3299
3300 if(ev->type == FocusIn) {
3301 XSetICFocus(xw.xic);
3302 xw.state |= WIN_FOCUSED;
3303 xseturgency(0);
3304 } else {
3305 XUnsetICFocus(xw.xic);
3306 xw.state &= ~WIN_FOCUSED;
3307 }
3308 }
3309
3310 inline bool
3311 match(uint mask, uint state) {
3312 state &= ~(ignoremod);
3313
3314 if(mask == XK_NO_MOD && state)
3315 return false;
3316 if(mask != XK_ANY_MOD && mask != XK_NO_MOD && !state)
3317 return false;
3318 if((state & mask) != state)
3319 return false;
3320 return true;
3321 }
3322
3323 void
3324 numlock(const Arg *dummy) {
3325 term.numlock ^= 1;
3326 }
3327
3328 char*
3329 kmap(KeySym k, uint state) {
3330 uint mask;
3331 Key *kp;
3332 int i;
3333
3334 /* Check for mapped keys out of X11 function keys. */
3335 for(i = 0; i < LEN(mappedkeys); i++) {
3336 if(mappedkeys[i] == k)
3337 break;
3338 }
3339 if(i == LEN(mappedkeys)) {
3340 if((k & 0xFFFF) < 0xFD00)
3341 return NULL;
3342 }
3343
3344 for(kp = key; kp < key + LEN(key); kp++) {
3345 mask = kp->mask;
3346
3347 if(kp->k != k)
3348 continue;
3349
3350 if(!match(mask, state))
3351 continue;
3352
3353 if(kp->appkey > 0) {
3354 if(!IS_SET(MODE_APPKEYPAD))
3355 continue;
3356 if(term.numlock && kp->appkey == 2)
3357 continue;
3358 } else if(kp->appkey < 0 && IS_SET(MODE_APPKEYPAD)) {
3359 continue;
3360 }
3361
3362 if((kp->appcursor < 0 && IS_SET(MODE_APPCURSOR)) ||
3363 (kp->appcursor > 0
3364 && !IS_SET(MODE_APPCURSOR))) {
3365 continue;
3366 }
3367
3368 if((kp->crlf < 0 && IS_SET(MODE_CRLF)) ||
3369 (kp->crlf > 0 && !IS_SET(MODE_CRLF))) {
3370 continue;
3371 }
3372
3373 return kp->s;
3374 }
3375
3376 return NULL;
3377 }
3378
3379 void
3380 kpress(XEvent *ev) {
3381 XKeyEvent *e = &ev->xkey;
3382 KeySym ksym;
3383 char xstr[31], buf[32], *customkey, *cp = buf;
3384 int len, ret;
3385 long c;
3386 Status status;
3387 Shortcut *bp;
3388
3389 if(IS_SET(MODE_KBDLOCK))
3390 return;
3391
3392 len = XmbLookupString(xw.xic, e, xstr, sizeof(xstr), &ksym, &status);
3393 e->state &= ~Mod2Mask;
3394 /* 1. shortcuts */
3395 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3396 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3397 bp->func(&(bp->arg));
3398 return;
3399 }
3400 }
3401
3402 /* 2. custom keys from config.h */
3403 if((customkey = kmap(ksym, e->state))) {
3404 len = strlen(customkey);
3405 memcpy(buf, customkey, len);
3406 /* 3. hardcoded (overrides X lookup) */
3407 } else {
3408 if(len == 0)
3409 return;
3410
3411 if(len == 1 && e->state & Mod1Mask) {
3412 if(IS_SET(MODE_8BIT)) {
3413 if(*xstr < 0177) {
3414 c = *xstr | B7;
3415 ret = utf8encode(&c, cp);
3416 cp += ret;
3417 len = 0;
3418 }
3419 } else {
3420 *cp++ = '\033';
3421 }
3422 }
3423
3424 memcpy(cp, xstr, len);
3425 len = cp - buf + len;
3426 }
3427
3428 ttywrite(buf, len);
3429 if(IS_SET(MODE_ECHO))
3430 techo(buf, len);
3431 }
3432
3433
3434 void
3435 cmessage(XEvent *e) {
3436 /*
3437 * See xembed specs
3438 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3439 */
3440 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3441 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3442 xw.state |= WIN_FOCUSED;
3443 xseturgency(0);
3444 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3445 xw.state &= ~WIN_FOCUSED;
3446 }
3447 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3448 /* Send SIGHUP to shell */
3449 kill(pid, SIGHUP);
3450 exit(EXIT_SUCCESS);
3451 }
3452 }
3453
3454 void
3455 cresize(int width, int height) {
3456 int col, row;
3457
3458 if(width != 0)
3459 xw.w = width;
3460 if(height != 0)
3461 xw.h = height;
3462
3463 col = (xw.w - 2 * borderpx) / xw.cw;
3464 row = (xw.h - 2 * borderpx) / xw.ch;
3465
3466 tresize(col, row);
3467 xresize(col, row);
3468 ttyresize();
3469 }
3470
3471 void
3472 resize(XEvent *e) {
3473 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3474 return;
3475
3476 cresize(e->xconfigure.width, e->xconfigure.height);
3477 }
3478
3479 void
3480 run(void) {
3481 XEvent ev;
3482 fd_set rfd;
3483 int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3484 struct timeval drawtimeout, *tv = NULL, now, last, lastblink;
3485
3486 gettimeofday(&lastblink, NULL);
3487 gettimeofday(&last, NULL);
3488
3489 for(xev = actionfps;;) {
3490 FD_ZERO(&rfd);
3491 FD_SET(cmdfd, &rfd);
3492 FD_SET(xfd, &rfd);
3493
3494 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
3495 if(errno == EINTR)
3496 continue;
3497 die("select failed: %s\n", SERRNO);
3498 }
3499 if(FD_ISSET(cmdfd, &rfd)) {
3500 ttyread();
3501 if(blinktimeout) {
3502 blinkset = tattrset(ATTR_BLINK);
3503 if(!blinkset && term.mode & ATTR_BLINK)
3504 term.mode &= ~(MODE_BLINK);
3505 }
3506 }
3507
3508 if(FD_ISSET(xfd, &rfd))
3509 xev = actionfps;
3510
3511 gettimeofday(&now, NULL);
3512 drawtimeout.tv_sec = 0;
3513 drawtimeout.tv_usec = (1000/xfps) * 1000;
3514 tv = &drawtimeout;
3515
3516 dodraw = 0;
3517 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
3518 tsetdirtattr(ATTR_BLINK);
3519 term.mode ^= MODE_BLINK;
3520 gettimeofday(&lastblink, NULL);
3521 dodraw = 1;
3522 }
3523 if(TIMEDIFF(now, last) \
3524 > (xev? (1000/xfps) : (1000/actionfps))) {
3525 dodraw = 1;
3526 last = now;
3527 }
3528
3529 if(dodraw) {
3530 while(XPending(xw.dpy)) {
3531 XNextEvent(xw.dpy, &ev);
3532 if(XFilterEvent(&ev, None))
3533 continue;
3534 if(handler[ev.type])
3535 (handler[ev.type])(&ev);
3536 }
3537
3538 draw();
3539 XFlush(xw.dpy);
3540
3541 if(xev && !FD_ISSET(xfd, &rfd))
3542 xev--;
3543 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
3544 if(blinkset) {
3545 if(TIMEDIFF(now, lastblink) \
3546 > blinktimeout) {
3547 drawtimeout.tv_usec = 1;
3548 } else {
3549 drawtimeout.tv_usec = (1000 * \
3550 (blinktimeout - \
3551 TIMEDIFF(now,
3552 lastblink)));
3553 }
3554 } else {
3555 tv = NULL;
3556 }
3557 }
3558 }
3559 }
3560 }
3561
3562 void
3563 usage(void) {
3564 die("%s " VERSION " (c) 2010-2013 st engineers\n" \
3565 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]" \
3566 " [-t title] [-w windowid] [-e command ...]\n", argv0);
3567 }
3568
3569 int
3570 main(int argc, char *argv[]) {
3571 int bitm, xr, yr;
3572 uint wr, hr;
3573
3574 xw.fw = xw.fh = xw.fx = xw.fy = 0;
3575 xw.isfixed = False;
3576
3577 ARGBEGIN {
3578 case 'a':
3579 allowaltscreen = false;
3580 break;
3581 case 'c':
3582 opt_class = EARGF(usage());
3583 break;
3584 case 'e':
3585 /* eat all remaining arguments */
3586 if(argc > 1)
3587 opt_cmd = &argv[1];
3588 goto run;
3589 case 'f':
3590 opt_font = EARGF(usage());
3591 break;
3592 case 'g':
3593 bitm = XParseGeometry(EARGF(usage()), &xr, &yr, &wr, &hr);
3594 if(bitm & XValue)
3595 xw.fx = xr;
3596 if(bitm & YValue)
3597 xw.fy = yr;
3598 if(bitm & WidthValue)
3599 xw.fw = (int)wr;
3600 if(bitm & HeightValue)
3601 xw.fh = (int)hr;
3602 if(bitm & XNegative && xw.fx == 0)
3603 xw.fx = -1;
3604 if(bitm & XNegative && xw.fy == 0)
3605 xw.fy = -1;
3606
3607 if(xw.fh != 0 && xw.fw != 0)
3608 xw.isfixed = True;
3609 break;
3610 case 'o':
3611 opt_io = EARGF(usage());
3612 break;
3613 case 't':
3614 opt_title = EARGF(usage());
3615 break;
3616 case 'w':
3617 opt_embed = EARGF(usage());
3618 break;
3619 case 'v':
3620 default:
3621 usage();
3622 } ARGEND;
3623
3624 run:
3625 setlocale(LC_CTYPE, "");
3626 XSetLocaleModifiers("");
3627 tnew(80, 24);
3628 xinit();
3629 ttynew();
3630 selinit();
3631 if(xw.isfixed)
3632 cresize(xw.h, xw.w);
3633 run();
3634
3635 return 0;
3636 }
3637