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