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0f47d6df704b882b3770a7c87a5093c3cbe19cbf
[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(term.line[*y][*x + direction].c[0] == ' ')
711 break;
712
713 *x += direction;
714 }
715 break;
716 case SNAP_LINE:
717 /*
718 * Snap around if the the previous line or the current one
719 * has set ATTR_WRAP at its end. Then the whole next or
720 * previous line will be selected.
721 */
722 *x = (direction < 0) ? 0 : term.col - 1;
723 if(direction < 0 && *y > 0) {
724 for(; *y > 0; *y += direction) {
725 if(!(term.line[*y-1][term.col-1].mode
726 & ATTR_WRAP)) {
727 break;
728 }
729 }
730 } else if(direction > 0 && *y < term.row-1) {
731 for(; *y < term.row; *y += direction) {
732 if(!(term.line[*y][term.col-1].mode
733 & ATTR_WRAP)) {
734 break;
735 }
736 }
737 }
738 break;
739 default:
740 /*
741 * Select the whole line when the end of line is reached.
742 */
743 if(direction > 0) {
744 i = term.col;
745 while(--i > 0 && term.line[*y][i].c[0] == ' ')
746 /* nothing */;
747 if(i > 0 && i < *x)
748 *x = term.col - 1;
749 }
750 break;
751 }
752 }
753
754 void
755 getbuttoninfo(XEvent *e) {
756 int type;
757 uint state = e->xbutton.state &~Button1Mask;
758
759 sel.alt = IS_SET(MODE_ALTSCREEN);
760
761 sel.ex = x2col(e->xbutton.x);
762 sel.ey = y2row(e->xbutton.y);
763
764 if (sel.by < sel.ey
765 || (sel.by == sel.ey && sel.bx < sel.ex)) {
766 selsnap(sel.snap, &sel.bx, &sel.by, -1);
767 selsnap(sel.snap, &sel.ex, &sel.ey, +1);
768 } else {
769 selsnap(sel.snap, &sel.ex, &sel.ey, -1);
770 selsnap(sel.snap, &sel.bx, &sel.by, +1);
771 }
772
773 sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
774 sel.b.y = MIN(sel.by, sel.ey);
775 sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
776 sel.e.y = MAX(sel.by, sel.ey);
777
778 sel.type = SEL_REGULAR;
779 for(type = 1; type < LEN(selmasks); ++type) {
780 if(match(selmasks[type], state)) {
781 sel.type = type;
782 break;
783 }
784 }
785 }
786
787 void
788 mousereport(XEvent *e) {
789 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
790 button = e->xbutton.button, state = e->xbutton.state,
791 len;
792 char buf[40];
793 static int ob, ox, oy;
794
795 /* from urxvt */
796 if(e->xbutton.type == MotionNotify) {
797 if(!IS_SET(MODE_MOUSEMOTION) || (x == ox && y == oy))
798 return;
799 button = ob + 32;
800 ox = x, oy = y;
801 } else if(!IS_SET(MODE_MOUSESGR)
802 && (e->xbutton.type == ButtonRelease
803 || button == AnyButton)) {
804 button = 3;
805 } else {
806 button -= Button1;
807 if(button >= 3)
808 button += 64 - 3;
809 if(e->xbutton.type == ButtonPress) {
810 ob = button;
811 ox = x, oy = y;
812 }
813 }
814
815 button += (state & ShiftMask ? 4 : 0)
816 + (state & Mod4Mask ? 8 : 0)
817 + (state & ControlMask ? 16 : 0);
818
819 len = 0;
820 if(IS_SET(MODE_MOUSESGR)) {
821 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
822 button, x+1, y+1,
823 e->xbutton.type == ButtonRelease ? 'm' : 'M');
824 } else if(x < 223 && y < 223) {
825 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
826 32+button, 32+x+1, 32+y+1);
827 } else {
828 return;
829 }
830
831 ttywrite(buf, len);
832 }
833
834 void
835 bpress(XEvent *e) {
836 struct timeval now;
837 Mousekey *mk;
838
839 if(IS_SET(MODE_MOUSE)) {
840 mousereport(e);
841 return;
842 }
843
844 for(mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
845 if(e->xbutton.button == mk->b
846 && match(mk->mask, e->xbutton.state)) {
847 ttywrite(mk->s, strlen(mk->s));
848 if(IS_SET(MODE_ECHO))
849 techo(mk->s, strlen(mk->s));
850 return;
851 }
852 }
853
854 if(e->xbutton.button == Button1) {
855 gettimeofday(&now, NULL);
856
857 /* Clear previous selection, logically and visually. */
858 if(sel.bx != -1) {
859 sel.bx = -1;
860 tsetdirt(sel.b.y, sel.e.y);
861 draw();
862 }
863 sel.mode = 1;
864 sel.type = SEL_REGULAR;
865 sel.ex = sel.bx = x2col(e->xbutton.x);
866 sel.ey = sel.by = y2row(e->xbutton.y);
867
868 /*
869 * If the user clicks below predefined timeouts specific
870 * snapping behaviour is exposed.
871 */
872 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
873 sel.snap = SNAP_LINE;
874 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
875 sel.snap = SNAP_WORD;
876 } else {
877 sel.snap = 0;
878 }
879 selsnap(sel.snap, &sel.bx, &sel.by, -1);
880 selsnap(sel.snap, &sel.ex, &sel.ey, +1);
881 sel.b.x = sel.bx;
882 sel.b.y = sel.by;
883 sel.e.x = sel.ex;
884 sel.e.y = sel.ey;
885
886 /*
887 * Draw selection, unless it's regular and we don't want to
888 * make clicks visible
889 */
890 if(sel.snap != 0) {
891 sel.mode++;
892 tsetdirt(sel.b.y, sel.e.y);
893 draw();
894 }
895 sel.tclick2 = sel.tclick1;
896 sel.tclick1 = now;
897 }
898 }
899
900 void
901 selcopy(void) {
902 char *str, *ptr;
903 int x, y, bufsize, size, i, ex;
904 Glyph *gp, *last;
905
906 if(sel.bx == -1) {
907 str = NULL;
908 } else {
909 bufsize = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
910 ptr = str = xmalloc(bufsize);
911
912 /* append every set & selected glyph to the selection */
913 for(y = sel.b.y; y < sel.e.y + 1; y++) {
914 gp = &term.line[y][0];
915 last = gp + term.col;
916
917 while(--last >= gp && !(selected(last - gp, y) && \
918 strcmp(last->c, " ") != 0))
919 /* nothing */;
920
921 for(x = 0; gp <= last; x++, ++gp) {
922 if(!selected(x, y))
923 continue;
924
925 size = utf8size(gp->c);
926 memcpy(ptr, gp->c, size);
927 ptr += size;
928 }
929
930 /*
931 * Copy and pasting of line endings is inconsistent
932 * in the inconsistent terminal and GUI world.
933 * The best solution seems like to produce '\n' when
934 * something is copied from st and convert '\n' to
935 * '\r', when something to be pasted is received by
936 * st.
937 * FIXME: Fix the computer world.
938 */
939 if(y < sel.e.y && !((gp-1)->mode & ATTR_WRAP))
940 *ptr++ = '\n';
941
942 /*
943 * If the last selected line expands in the selection
944 * after the visible text '\n' is appended.
945 */
946 if(y == sel.e.y) {
947 i = term.col;
948 while(--i > 0 && term.line[y][i].c[0] == ' ')
949 /* nothing */;
950 ex = sel.e.x;
951 if(sel.b.y == sel.e.y && sel.e.x < sel.b.x)
952 ex = sel.b.x;
953 if(i < ex)
954 *ptr++ = '\n';
955 }
956 }
957 *ptr = 0;
958 }
959 xsetsel(str);
960 }
961
962 void
963 selnotify(XEvent *e) {
964 ulong nitems, ofs, rem;
965 int format;
966 uchar *data, *last, *repl;
967 Atom type;
968
969 ofs = 0;
970 do {
971 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
972 False, AnyPropertyType, &type, &format,
973 &nitems, &rem, &data)) {
974 fprintf(stderr, "Clipboard allocation failed\n");
975 return;
976 }
977
978 /*
979 * As seen in selcopy:
980 * Line endings are inconsistent in the terminal and GUI world
981 * copy and pasting. When receiving some selection data,
982 * replace all '\n' with '\r'.
983 * FIXME: Fix the computer world.
984 */
985 repl = data;
986 last = data + nitems * format / 8;
987 while((repl = memchr(repl, '\n', last - repl))) {
988 *repl++ = '\r';
989 }
990
991 ttywrite((const char *)data, nitems * format / 8);
992 XFree(data);
993 /* number of 32-bit chunks returned */
994 ofs += nitems * format / 32;
995 } while(rem > 0);
996 }
997
998 void
999 selpaste(const Arg *dummy) {
1000 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
1001 xw.win, CurrentTime);
1002 }
1003
1004 void
1005 clippaste(const Arg *dummy) {
1006 Atom clipboard;
1007
1008 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1009 XConvertSelection(xw.dpy, clipboard, sel.xtarget, XA_PRIMARY,
1010 xw.win, CurrentTime);
1011 }
1012
1013 void
1014 selclear(XEvent *e) {
1015 if(sel.bx == -1)
1016 return;
1017 sel.bx = -1;
1018 tsetdirt(sel.b.y, sel.e.y);
1019 }
1020
1021 void
1022 selrequest(XEvent *e) {
1023 XSelectionRequestEvent *xsre;
1024 XSelectionEvent xev;
1025 Atom xa_targets, string;
1026
1027 xsre = (XSelectionRequestEvent *) e;
1028 xev.type = SelectionNotify;
1029 xev.requestor = xsre->requestor;
1030 xev.selection = xsre->selection;
1031 xev.target = xsre->target;
1032 xev.time = xsre->time;
1033 /* reject */
1034 xev.property = None;
1035
1036 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
1037 if(xsre->target == xa_targets) {
1038 /* respond with the supported type */
1039 string = sel.xtarget;
1040 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1041 XA_ATOM, 32, PropModeReplace,
1042 (uchar *) &string, 1);
1043 xev.property = xsre->property;
1044 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
1045 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1046 xsre->target, 8, PropModeReplace,
1047 (uchar *) sel.clip, strlen(sel.clip));
1048 xev.property = xsre->property;
1049 }
1050
1051 /* all done, send a notification to the listener */
1052 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
1053 fprintf(stderr, "Error sending SelectionNotify event\n");
1054 }
1055
1056 void
1057 xsetsel(char *str) {
1058 /* register the selection for both the clipboard and the primary */
1059 Atom clipboard;
1060
1061 free(sel.clip);
1062 sel.clip = str;
1063
1064 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
1065
1066 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1067 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
1068 }
1069
1070 void
1071 brelease(XEvent *e) {
1072 if(IS_SET(MODE_MOUSE)) {
1073 mousereport(e);
1074 return;
1075 }
1076
1077 if(e->xbutton.button == Button2) {
1078 selpaste(NULL);
1079 } else if(e->xbutton.button == Button1) {
1080 if(sel.mode < 2) {
1081 sel.bx = -1;
1082 } else {
1083 getbuttoninfo(e);
1084 selcopy();
1085 }
1086 sel.mode = 0;
1087 term.dirty[sel.ey] = 1;
1088 }
1089 }
1090
1091 void
1092 bmotion(XEvent *e) {
1093 int oldey, oldex, oldsby, oldsey;
1094
1095 if(IS_SET(MODE_MOUSE)) {
1096 mousereport(e);
1097 return;
1098 }
1099
1100 if(!sel.mode)
1101 return;
1102
1103 sel.mode++;
1104 oldey = sel.ey;
1105 oldex = sel.ex;
1106 oldsby = sel.b.y;
1107 oldsey = sel.e.y;
1108 getbuttoninfo(e);
1109
1110 if(oldey != sel.ey || oldex != sel.ex) {
1111 tsetdirt(MIN(sel.b.y, oldsby), MAX(sel.e.y, oldsey));
1112 }
1113 }
1114
1115 void
1116 die(const char *errstr, ...) {
1117 va_list ap;
1118
1119 va_start(ap, errstr);
1120 vfprintf(stderr, errstr, ap);
1121 va_end(ap);
1122 exit(EXIT_FAILURE);
1123 }
1124
1125 void
1126 execsh(void) {
1127 char **args;
1128 char *envshell = getenv("SHELL");
1129 const struct passwd *pass = getpwuid(getuid());
1130 char buf[sizeof(long) * 8 + 1];
1131
1132 unsetenv("COLUMNS");
1133 unsetenv("LINES");
1134 unsetenv("TERMCAP");
1135
1136 if(pass) {
1137 setenv("LOGNAME", pass->pw_name, 1);
1138 setenv("USER", pass->pw_name, 1);
1139 setenv("SHELL", pass->pw_shell, 0);
1140 setenv("HOME", pass->pw_dir, 0);
1141 }
1142
1143 snprintf(buf, sizeof(buf), "%lu", xw.win);
1144 setenv("WINDOWID", buf, 1);
1145
1146 signal(SIGCHLD, SIG_DFL);
1147 signal(SIGHUP, SIG_DFL);
1148 signal(SIGINT, SIG_DFL);
1149 signal(SIGQUIT, SIG_DFL);
1150 signal(SIGTERM, SIG_DFL);
1151 signal(SIGALRM, SIG_DFL);
1152
1153 DEFAULT(envshell, shell);
1154 setenv("TERM", termname, 1);
1155 args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
1156 execvp(args[0], args);
1157 exit(EXIT_FAILURE);
1158 }
1159
1160 void
1161 sigchld(int a) {
1162 int stat = 0;
1163
1164 if(waitpid(pid, &stat, 0) < 0)
1165 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
1166
1167 if(WIFEXITED(stat)) {
1168 exit(WEXITSTATUS(stat));
1169 } else {
1170 exit(EXIT_FAILURE);
1171 }
1172 }
1173
1174 void
1175 ttynew(void) {
1176 int m, s;
1177 struct winsize w = {term.row, term.col, 0, 0};
1178
1179 /* seems to work fine on linux, openbsd and freebsd */
1180 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1181 die("openpty failed: %s\n", SERRNO);
1182
1183 switch(pid = fork()) {
1184 case -1:
1185 die("fork failed\n");
1186 break;
1187 case 0:
1188 setsid(); /* create a new process group */
1189 dup2(s, STDIN_FILENO);
1190 dup2(s, STDOUT_FILENO);
1191 dup2(s, STDERR_FILENO);
1192 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1193 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
1194 close(s);
1195 close(m);
1196 execsh();
1197 break;
1198 default:
1199 close(s);
1200 cmdfd = m;
1201 signal(SIGCHLD, sigchld);
1202 if(opt_io) {
1203 iofd = (!strcmp(opt_io, "-")) ?
1204 STDOUT_FILENO :
1205 open(opt_io, O_WRONLY | O_CREAT, 0666);
1206 if(iofd < 0) {
1207 fprintf(stderr, "Error opening %s:%s\n",
1208 opt_io, strerror(errno));
1209 }
1210 }
1211 }
1212 }
1213
1214 void
1215 dump(char c) {
1216 static int col;
1217
1218 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
1219 if(++col % 10 == 0)
1220 fprintf(stderr, "\n");
1221 }
1222
1223 void
1224 ttyread(void) {
1225 static char buf[BUFSIZ];
1226 static int buflen = 0;
1227 char *ptr;
1228 char s[UTF_SIZ];
1229 int charsize; /* size of utf8 char in bytes */
1230 long utf8c;
1231 int ret;
1232
1233 /* append read bytes to unprocessed bytes */
1234 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1235 die("Couldn't read from shell: %s\n", SERRNO);
1236
1237 /* process every complete utf8 char */
1238 buflen += ret;
1239 ptr = buf;
1240 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
1241 charsize = utf8decode(ptr, &utf8c);
1242 utf8encode(&utf8c, s);
1243 tputc(s, charsize);
1244 ptr += charsize;
1245 buflen -= charsize;
1246 }
1247
1248 /* keep any uncomplete utf8 char for the next call */
1249 memmove(buf, ptr, buflen);
1250 }
1251
1252 void
1253 ttywrite(const char *s, size_t n) {
1254 if(write(cmdfd, s, n) == -1)
1255 die("write error on tty: %s\n", SERRNO);
1256 }
1257
1258 void
1259 ttyresize(void) {
1260 struct winsize w;
1261
1262 w.ws_row = term.row;
1263 w.ws_col = term.col;
1264 w.ws_xpixel = xw.tw;
1265 w.ws_ypixel = xw.th;
1266 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1267 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
1268 }
1269
1270 int
1271 tattrset(int attr) {
1272 int i, j;
1273
1274 for(i = 0; i < term.row-1; i++) {
1275 for(j = 0; j < term.col-1; j++) {
1276 if(term.line[i][j].mode & attr)
1277 return 1;
1278 }
1279 }
1280
1281 return 0;
1282 }
1283
1284 void
1285 tsetdirt(int top, int bot) {
1286 int i;
1287
1288 LIMIT(top, 0, term.row-1);
1289 LIMIT(bot, 0, term.row-1);
1290
1291 for(i = top; i <= bot; i++)
1292 term.dirty[i] = 1;
1293 }
1294
1295 void
1296 tsetdirtattr(int attr) {
1297 int i, j;
1298
1299 for(i = 0; i < term.row-1; i++) {
1300 for(j = 0; j < term.col-1; j++) {
1301 if(term.line[i][j].mode & attr) {
1302 tsetdirt(i, i);
1303 break;
1304 }
1305 }
1306 }
1307 }
1308
1309 void
1310 tfulldirt(void) {
1311 tsetdirt(0, term.row-1);
1312 }
1313
1314 void
1315 tcursor(int mode) {
1316 static TCursor c;
1317
1318 if(mode == CURSOR_SAVE) {
1319 c = term.c;
1320 } else if(mode == CURSOR_LOAD) {
1321 term.c = c;
1322 tmoveto(c.x, c.y);
1323 }
1324 }
1325
1326 void
1327 treset(void) {
1328 uint i;
1329
1330 term.c = (TCursor){{
1331 .mode = ATTR_NULL,
1332 .fg = defaultfg,
1333 .bg = defaultbg
1334 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1335
1336 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1337 for(i = tabspaces; i < term.col; i += tabspaces)
1338 term.tabs[i] = 1;
1339 term.top = 0;
1340 term.bot = term.row - 1;
1341 term.mode = MODE_WRAP;
1342
1343 tclearregion(0, 0, term.col-1, term.row-1);
1344 tmoveto(0, 0);
1345 tcursor(CURSOR_SAVE);
1346 }
1347
1348 void
1349 tnew(int col, int row) {
1350 memset(&term, 0, sizeof(Term));
1351 tresize(col, row);
1352 term.numlock = 1;
1353
1354 treset();
1355 }
1356
1357 void
1358 tswapscreen(void) {
1359 Line *tmp = term.line;
1360
1361 term.line = term.alt;
1362 term.alt = tmp;
1363 term.mode ^= MODE_ALTSCREEN;
1364 tfulldirt();
1365 }
1366
1367 void
1368 tscrolldown(int orig, int n) {
1369 int i;
1370 Line temp;
1371
1372 LIMIT(n, 0, term.bot-orig+1);
1373
1374 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1375
1376 for(i = term.bot; i >= orig+n; i--) {
1377 temp = term.line[i];
1378 term.line[i] = term.line[i-n];
1379 term.line[i-n] = temp;
1380
1381 term.dirty[i] = 1;
1382 term.dirty[i-n] = 1;
1383 }
1384
1385 selscroll(orig, n);
1386 }
1387
1388 void
1389 tscrollup(int orig, int n) {
1390 int i;
1391 Line temp;
1392 LIMIT(n, 0, term.bot-orig+1);
1393
1394 tclearregion(0, orig, term.col-1, orig+n-1);
1395
1396 for(i = orig; i <= term.bot-n; i++) {
1397 temp = term.line[i];
1398 term.line[i] = term.line[i+n];
1399 term.line[i+n] = temp;
1400
1401 term.dirty[i] = 1;
1402 term.dirty[i+n] = 1;
1403 }
1404
1405 selscroll(orig, -n);
1406 }
1407
1408 void
1409 selscroll(int orig, int n) {
1410 if(sel.bx == -1)
1411 return;
1412
1413 if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
1414 if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
1415 sel.bx = -1;
1416 return;
1417 }
1418 if(sel.type == SEL_RECTANGULAR) {
1419 if(sel.by < term.top)
1420 sel.by = term.top;
1421 if(sel.ey > term.bot)
1422 sel.ey = term.bot;
1423 } else {
1424 if(sel.by < term.top) {
1425 sel.by = term.top;
1426 sel.bx = 0;
1427 }
1428 if(sel.ey > term.bot) {
1429 sel.ey = term.bot;
1430 sel.ex = term.col;
1431 }
1432 }
1433 sel.b.y = sel.by, sel.b.x = sel.bx;
1434 sel.e.y = sel.ey, sel.e.x = sel.ex;
1435 }
1436 }
1437
1438 void
1439 tnewline(int first_col) {
1440 int y = term.c.y;
1441
1442 if(y == term.bot) {
1443 tscrollup(term.top, 1);
1444 } else {
1445 y++;
1446 }
1447 tmoveto(first_col ? 0 : term.c.x, y);
1448 }
1449
1450 void
1451 csiparse(void) {
1452 char *p = csiescseq.buf, *np;
1453 long int v;
1454
1455 csiescseq.narg = 0;
1456 if(*p == '?') {
1457 csiescseq.priv = 1;
1458 p++;
1459 }
1460
1461 csiescseq.buf[csiescseq.len] = '\0';
1462 while(p < csiescseq.buf+csiescseq.len) {
1463 np = NULL;
1464 v = strtol(p, &np, 10);
1465 if(np == p)
1466 v = 0;
1467 if(v == LONG_MAX || v == LONG_MIN)
1468 v = -1;
1469 csiescseq.arg[csiescseq.narg++] = v;
1470 p = np;
1471 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1472 break;
1473 p++;
1474 }
1475 csiescseq.mode = *p;
1476 }
1477
1478 /* for absolute user moves, when decom is set */
1479 void
1480 tmoveato(int x, int y) {
1481 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1482 }
1483
1484 void
1485 tmoveto(int x, int y) {
1486 int miny, maxy;
1487
1488 if(term.c.state & CURSOR_ORIGIN) {
1489 miny = term.top;
1490 maxy = term.bot;
1491 } else {
1492 miny = 0;
1493 maxy = term.row - 1;
1494 }
1495 LIMIT(x, 0, term.col-1);
1496 LIMIT(y, miny, maxy);
1497 term.c.state &= ~CURSOR_WRAPNEXT;
1498 term.c.x = x;
1499 term.c.y = y;
1500 }
1501
1502 void
1503 tsetchar(char *c, Glyph *attr, int x, int y) {
1504 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1505 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1506 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1507 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1508 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1509 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1510 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1511 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1512 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1513 };
1514
1515 /*
1516 * The table is proudly stolen from rxvt.
1517 */
1518 if(attr->mode & ATTR_GFX) {
1519 if(c[0] >= 0x41 && c[0] <= 0x7e
1520 && vt100_0[c[0] - 0x41]) {
1521 c = vt100_0[c[0] - 0x41];
1522 }
1523 }
1524
1525 term.dirty[y] = 1;
1526 term.line[y][x] = *attr;
1527 memcpy(term.line[y][x].c, c, UTF_SIZ);
1528 }
1529
1530 void
1531 tclearregion(int x1, int y1, int x2, int y2) {
1532 int x, y, temp;
1533
1534 if(x1 > x2)
1535 temp = x1, x1 = x2, x2 = temp;
1536 if(y1 > y2)
1537 temp = y1, y1 = y2, y2 = temp;
1538
1539 LIMIT(x1, 0, term.col-1);
1540 LIMIT(x2, 0, term.col-1);
1541 LIMIT(y1, 0, term.row-1);
1542 LIMIT(y2, 0, term.row-1);
1543
1544 for(y = y1; y <= y2; y++) {
1545 term.dirty[y] = 1;
1546 for(x = x1; x <= x2; x++) {
1547 if(selected(x, y))
1548 selclear(NULL);
1549 term.line[y][x] = term.c.attr;
1550 memcpy(term.line[y][x].c, " ", 2);
1551 }
1552 }
1553 }
1554
1555 void
1556 tdeletechar(int n) {
1557 int src = term.c.x + n;
1558 int dst = term.c.x;
1559 int size = term.col - src;
1560
1561 term.dirty[term.c.y] = 1;
1562
1563 if(src >= term.col) {
1564 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1565 return;
1566 }
1567
1568 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1569 size * sizeof(Glyph));
1570 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1571 }
1572
1573 void
1574 tinsertblank(int n) {
1575 int src = term.c.x;
1576 int dst = src + n;
1577 int size = term.col - dst;
1578
1579 term.dirty[term.c.y] = 1;
1580
1581 if(dst >= term.col) {
1582 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1583 return;
1584 }
1585
1586 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1587 size * sizeof(Glyph));
1588 tclearregion(src, term.c.y, dst - 1, term.c.y);
1589 }
1590
1591 void
1592 tinsertblankline(int n) {
1593 if(term.c.y < term.top || term.c.y > term.bot)
1594 return;
1595
1596 tscrolldown(term.c.y, n);
1597 }
1598
1599 void
1600 tdeleteline(int n) {
1601 if(term.c.y < term.top || term.c.y > term.bot)
1602 return;
1603
1604 tscrollup(term.c.y, n);
1605 }
1606
1607 void
1608 tsetattr(int *attr, int l) {
1609 int i;
1610
1611 for(i = 0; i < l; i++) {
1612 switch(attr[i]) {
1613 case 0:
1614 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE \
1615 | ATTR_BOLD | ATTR_ITALIC \
1616 | ATTR_BLINK);
1617 term.c.attr.fg = defaultfg;
1618 term.c.attr.bg = defaultbg;
1619 break;
1620 case 1:
1621 term.c.attr.mode |= ATTR_BOLD;
1622 break;
1623 case 3:
1624 term.c.attr.mode |= ATTR_ITALIC;
1625 break;
1626 case 4:
1627 term.c.attr.mode |= ATTR_UNDERLINE;
1628 break;
1629 case 5: /* slow blink */
1630 case 6: /* rapid blink */
1631 term.c.attr.mode |= ATTR_BLINK;
1632 break;
1633 case 7:
1634 term.c.attr.mode |= ATTR_REVERSE;
1635 break;
1636 case 21:
1637 case 22:
1638 term.c.attr.mode &= ~ATTR_BOLD;
1639 break;
1640 case 23:
1641 term.c.attr.mode &= ~ATTR_ITALIC;
1642 break;
1643 case 24:
1644 term.c.attr.mode &= ~ATTR_UNDERLINE;
1645 break;
1646 case 25:
1647 case 26:
1648 term.c.attr.mode &= ~ATTR_BLINK;
1649 break;
1650 case 27:
1651 term.c.attr.mode &= ~ATTR_REVERSE;
1652 break;
1653 case 38:
1654 if(i + 2 < l && attr[i + 1] == 5) {
1655 i += 2;
1656 if(BETWEEN(attr[i], 0, 255)) {
1657 term.c.attr.fg = attr[i];
1658 } else {
1659 fprintf(stderr,
1660 "erresc: bad fgcolor %d\n",
1661 attr[i]);
1662 }
1663 } else {
1664 fprintf(stderr,
1665 "erresc(38): gfx attr %d unknown\n",
1666 attr[i]);
1667 }
1668 break;
1669 case 39:
1670 term.c.attr.fg = defaultfg;
1671 break;
1672 case 48:
1673 if(i + 2 < l && attr[i + 1] == 5) {
1674 i += 2;
1675 if(BETWEEN(attr[i], 0, 255)) {
1676 term.c.attr.bg = attr[i];
1677 } else {
1678 fprintf(stderr,
1679 "erresc: bad bgcolor %d\n",
1680 attr[i]);
1681 }
1682 } else {
1683 fprintf(stderr,
1684 "erresc(48): gfx attr %d unknown\n",
1685 attr[i]);
1686 }
1687 break;
1688 case 49:
1689 term.c.attr.bg = defaultbg;
1690 break;
1691 default:
1692 if(BETWEEN(attr[i], 30, 37)) {
1693 term.c.attr.fg = attr[i] - 30;
1694 } else if(BETWEEN(attr[i], 40, 47)) {
1695 term.c.attr.bg = attr[i] - 40;
1696 } else if(BETWEEN(attr[i], 90, 97)) {
1697 term.c.attr.fg = attr[i] - 90 + 8;
1698 } else if(BETWEEN(attr[i], 100, 107)) {
1699 term.c.attr.bg = attr[i] - 100 + 8;
1700 } else {
1701 fprintf(stderr,
1702 "erresc(default): gfx attr %d unknown\n",
1703 attr[i]), csidump();
1704 }
1705 break;
1706 }
1707 }
1708 }
1709
1710 void
1711 tsetscroll(int t, int b) {
1712 int temp;
1713
1714 LIMIT(t, 0, term.row-1);
1715 LIMIT(b, 0, term.row-1);
1716 if(t > b) {
1717 temp = t;
1718 t = b;
1719 b = temp;
1720 }
1721 term.top = t;
1722 term.bot = b;
1723 }
1724
1725 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1726
1727 void
1728 tsetmode(bool priv, bool set, int *args, int narg) {
1729 int *lim, mode;
1730 bool alt;
1731
1732 for(lim = args + narg; args < lim; ++args) {
1733 if(priv) {
1734 switch(*args) {
1735 break;
1736 case 1: /* DECCKM -- Cursor key */
1737 MODBIT(term.mode, set, MODE_APPCURSOR);
1738 break;
1739 case 5: /* DECSCNM -- Reverse video */
1740 mode = term.mode;
1741 MODBIT(term.mode, set, MODE_REVERSE);
1742 if(mode != term.mode)
1743 redraw(REDRAW_TIMEOUT);
1744 break;
1745 case 6: /* DECOM -- Origin */
1746 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1747 tmoveato(0, 0);
1748 break;
1749 case 7: /* DECAWM -- Auto wrap */
1750 MODBIT(term.mode, set, MODE_WRAP);
1751 break;
1752 case 0: /* Error (IGNORED) */
1753 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1754 case 3: /* DECCOLM -- Column (IGNORED) */
1755 case 4: /* DECSCLM -- Scroll (IGNORED) */
1756 case 8: /* DECARM -- Auto repeat (IGNORED) */
1757 case 18: /* DECPFF -- Printer feed (IGNORED) */
1758 case 19: /* DECPEX -- Printer extent (IGNORED) */
1759 case 42: /* DECNRCM -- National characters (IGNORED) */
1760 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1761 break;
1762 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1763 MODBIT(term.mode, !set, MODE_HIDE);
1764 break;
1765 case 1000: /* 1000,1002: enable xterm mouse report */
1766 MODBIT(term.mode, set, MODE_MOUSEBTN);
1767 MODBIT(term.mode, 0, MODE_MOUSEMOTION);
1768 break;
1769 case 1002:
1770 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1771 MODBIT(term.mode, 0, MODE_MOUSEBTN);
1772 break;
1773 case 1006:
1774 MODBIT(term.mode, set, MODE_MOUSESGR);
1775 break;
1776 case 1034:
1777 MODBIT(term.mode, set, MODE_8BIT);
1778 break;
1779 case 1049: /* = 1047 and 1048 */
1780 case 47:
1781 case 1047:
1782 if (!allowaltscreen)
1783 break;
1784
1785 alt = IS_SET(MODE_ALTSCREEN);
1786 if(alt) {
1787 tclearregion(0, 0, term.col-1,
1788 term.row-1);
1789 }
1790 if(set ^ alt) /* set is always 1 or 0 */
1791 tswapscreen();
1792 if(*args != 1049)
1793 break;
1794 /* FALLTRU */
1795 case 1048:
1796 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1797 break;
1798 default:
1799 fprintf(stderr,
1800 "erresc: unknown private set/reset mode %d\n",
1801 *args);
1802 break;
1803 }
1804 } else {
1805 switch(*args) {
1806 case 0: /* Error (IGNORED) */
1807 break;
1808 case 2: /* KAM -- keyboard action */
1809 MODBIT(term.mode, set, MODE_KBDLOCK);
1810 break;
1811 case 4: /* IRM -- Insertion-replacement */
1812 MODBIT(term.mode, set, MODE_INSERT);
1813 break;
1814 case 12: /* SRM -- Send/Receive */
1815 MODBIT(term.mode, !set, MODE_ECHO);
1816 break;
1817 case 20: /* LNM -- Linefeed/new line */
1818 MODBIT(term.mode, set, MODE_CRLF);
1819 break;
1820 default:
1821 fprintf(stderr,
1822 "erresc: unknown set/reset mode %d\n",
1823 *args);
1824 break;
1825 }
1826 }
1827 }
1828 }
1829 #undef MODBIT
1830
1831
1832 void
1833 csihandle(void) {
1834 switch(csiescseq.mode) {
1835 default:
1836 unknown:
1837 fprintf(stderr, "erresc: unknown csi ");
1838 csidump();
1839 /* die(""); */
1840 break;
1841 case '@': /* ICH -- Insert <n> blank char */
1842 DEFAULT(csiescseq.arg[0], 1);
1843 tinsertblank(csiescseq.arg[0]);
1844 break;
1845 case 'A': /* CUU -- Cursor <n> Up */
1846 DEFAULT(csiescseq.arg[0], 1);
1847 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1848 break;
1849 case 'B': /* CUD -- Cursor <n> Down */
1850 case 'e': /* VPR --Cursor <n> Down */
1851 DEFAULT(csiescseq.arg[0], 1);
1852 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1853 break;
1854 case 'c': /* DA -- Device Attributes */
1855 if(csiescseq.arg[0] == 0)
1856 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1857 break;
1858 case 'C': /* CUF -- Cursor <n> Forward */
1859 case 'a': /* HPR -- Cursor <n> Forward */
1860 DEFAULT(csiescseq.arg[0], 1);
1861 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1862 break;
1863 case 'D': /* CUB -- Cursor <n> Backward */
1864 DEFAULT(csiescseq.arg[0], 1);
1865 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1866 break;
1867 case 'E': /* CNL -- Cursor <n> Down and first col */
1868 DEFAULT(csiescseq.arg[0], 1);
1869 tmoveto(0, term.c.y+csiescseq.arg[0]);
1870 break;
1871 case 'F': /* CPL -- Cursor <n> Up and first col */
1872 DEFAULT(csiescseq.arg[0], 1);
1873 tmoveto(0, term.c.y-csiescseq.arg[0]);
1874 break;
1875 case 'g': /* TBC -- Tabulation clear */
1876 switch(csiescseq.arg[0]) {
1877 case 0: /* clear current tab stop */
1878 term.tabs[term.c.x] = 0;
1879 break;
1880 case 3: /* clear all the tabs */
1881 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1882 break;
1883 default:
1884 goto unknown;
1885 }
1886 break;
1887 case 'G': /* CHA -- Move to <col> */
1888 case '`': /* HPA */
1889 DEFAULT(csiescseq.arg[0], 1);
1890 tmoveto(csiescseq.arg[0]-1, term.c.y);
1891 break;
1892 case 'H': /* CUP -- Move to <row> <col> */
1893 case 'f': /* HVP */
1894 DEFAULT(csiescseq.arg[0], 1);
1895 DEFAULT(csiescseq.arg[1], 1);
1896 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1897 break;
1898 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1899 DEFAULT(csiescseq.arg[0], 1);
1900 while(csiescseq.arg[0]--)
1901 tputtab(1);
1902 break;
1903 case 'J': /* ED -- Clear screen */
1904 sel.bx = -1;
1905 switch(csiescseq.arg[0]) {
1906 case 0: /* below */
1907 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1908 if(term.c.y < term.row-1) {
1909 tclearregion(0, term.c.y+1, term.col-1,
1910 term.row-1);
1911 }
1912 break;
1913 case 1: /* above */
1914 if(term.c.y > 1)
1915 tclearregion(0, 0, term.col-1, term.c.y-1);
1916 tclearregion(0, term.c.y, term.c.x, term.c.y);
1917 break;
1918 case 2: /* all */
1919 tclearregion(0, 0, term.col-1, term.row-1);
1920 break;
1921 default:
1922 goto unknown;
1923 }
1924 break;
1925 case 'K': /* EL -- Clear line */
1926 switch(csiescseq.arg[0]) {
1927 case 0: /* right */
1928 tclearregion(term.c.x, term.c.y, term.col-1,
1929 term.c.y);
1930 break;
1931 case 1: /* left */
1932 tclearregion(0, term.c.y, term.c.x, term.c.y);
1933 break;
1934 case 2: /* all */
1935 tclearregion(0, term.c.y, term.col-1, term.c.y);
1936 break;
1937 }
1938 break;
1939 case 'S': /* SU -- Scroll <n> line up */
1940 DEFAULT(csiescseq.arg[0], 1);
1941 tscrollup(term.top, csiescseq.arg[0]);
1942 break;
1943 case 'T': /* SD -- Scroll <n> line down */
1944 DEFAULT(csiescseq.arg[0], 1);
1945 tscrolldown(term.top, csiescseq.arg[0]);
1946 break;
1947 case 'L': /* IL -- Insert <n> blank lines */
1948 DEFAULT(csiescseq.arg[0], 1);
1949 tinsertblankline(csiescseq.arg[0]);
1950 break;
1951 case 'l': /* RM -- Reset Mode */
1952 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
1953 break;
1954 case 'M': /* DL -- Delete <n> lines */
1955 DEFAULT(csiescseq.arg[0], 1);
1956 tdeleteline(csiescseq.arg[0]);
1957 break;
1958 case 'X': /* ECH -- Erase <n> char */
1959 DEFAULT(csiescseq.arg[0], 1);
1960 tclearregion(term.c.x, term.c.y,
1961 term.c.x + csiescseq.arg[0] - 1, term.c.y);
1962 break;
1963 case 'P': /* DCH -- Delete <n> char */
1964 DEFAULT(csiescseq.arg[0], 1);
1965 tdeletechar(csiescseq.arg[0]);
1966 break;
1967 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
1968 DEFAULT(csiescseq.arg[0], 1);
1969 while(csiescseq.arg[0]--)
1970 tputtab(0);
1971 break;
1972 case 'd': /* VPA -- Move to <row> */
1973 DEFAULT(csiescseq.arg[0], 1);
1974 tmoveato(term.c.x, csiescseq.arg[0]-1);
1975 break;
1976 case 'h': /* SM -- Set terminal mode */
1977 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
1978 break;
1979 case 'm': /* SGR -- Terminal attribute (color) */
1980 tsetattr(csiescseq.arg, csiescseq.narg);
1981 break;
1982 case 'r': /* DECSTBM -- Set Scrolling Region */
1983 if(csiescseq.priv) {
1984 goto unknown;
1985 } else {
1986 DEFAULT(csiescseq.arg[0], 1);
1987 DEFAULT(csiescseq.arg[1], term.row);
1988 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
1989 tmoveato(0, 0);
1990 }
1991 break;
1992 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1993 tcursor(CURSOR_SAVE);
1994 break;
1995 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1996 tcursor(CURSOR_LOAD);
1997 break;
1998 }
1999 }
2000
2001 void
2002 csidump(void) {
2003 int i;
2004 uint c;
2005
2006 printf("ESC[");
2007 for(i = 0; i < csiescseq.len; i++) {
2008 c = csiescseq.buf[i] & 0xff;
2009 if(isprint(c)) {
2010 putchar(c);
2011 } else if(c == '\n') {
2012 printf("(\\n)");
2013 } else if(c == '\r') {
2014 printf("(\\r)");
2015 } else if(c == 0x1b) {
2016 printf("(\\e)");
2017 } else {
2018 printf("(%02x)", c);
2019 }
2020 }
2021 putchar('\n');
2022 }
2023
2024 void
2025 csireset(void) {
2026 memset(&csiescseq, 0, sizeof(csiescseq));
2027 }
2028
2029 void
2030 strhandle(void) {
2031 char *p = NULL;
2032 int i, j, narg;
2033
2034 strparse();
2035 narg = strescseq.narg;
2036
2037 switch(strescseq.type) {
2038 case ']': /* OSC -- Operating System Command */
2039 switch(i = atoi(strescseq.args[0])) {
2040 case 0:
2041 case 1:
2042 case 2:
2043 if(narg > 1)
2044 xsettitle(strescseq.args[1]);
2045 break;
2046 case 4: /* color set */
2047 if(narg < 3)
2048 break;
2049 p = strescseq.args[2];
2050 /* fall through */
2051 case 104: /* color reset, here p = NULL */
2052 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2053 if (!xsetcolorname(j, p)) {
2054 fprintf(stderr, "erresc: invalid color %s\n", p);
2055 } else {
2056 /*
2057 * TODO if defaultbg color is changed, borders
2058 * are dirty
2059 */
2060 redraw(0);
2061 }
2062 break;
2063 default:
2064 fprintf(stderr, "erresc: unknown str ");
2065 strdump();
2066 break;
2067 }
2068 break;
2069 case 'k': /* old title set compatibility */
2070 xsettitle(strescseq.args[0]);
2071 break;
2072 case 'P': /* DSC -- Device Control String */
2073 case '_': /* APC -- Application Program Command */
2074 case '^': /* PM -- Privacy Message */
2075 default:
2076 fprintf(stderr, "erresc: unknown str ");
2077 strdump();
2078 /* die(""); */
2079 break;
2080 }
2081 }
2082
2083 void
2084 strparse(void) {
2085 char *p = strescseq.buf;
2086
2087 strescseq.narg = 0;
2088 strescseq.buf[strescseq.len] = '\0';
2089 while(p && strescseq.narg < STR_ARG_SIZ)
2090 strescseq.args[strescseq.narg++] = strsep(&p, ";");
2091 }
2092
2093 void
2094 strdump(void) {
2095 int i;
2096 uint c;
2097
2098 printf("ESC%c", strescseq.type);
2099 for(i = 0; i < strescseq.len; i++) {
2100 c = strescseq.buf[i] & 0xff;
2101 if(c == '\0') {
2102 return;
2103 } else if(isprint(c)) {
2104 putchar(c);
2105 } else if(c == '\n') {
2106 printf("(\\n)");
2107 } else if(c == '\r') {
2108 printf("(\\r)");
2109 } else if(c == 0x1b) {
2110 printf("(\\e)");
2111 } else {
2112 printf("(%02x)", c);
2113 }
2114 }
2115 printf("ESC\\\n");
2116 }
2117
2118 void
2119 strreset(void) {
2120 memset(&strescseq, 0, sizeof(strescseq));
2121 }
2122
2123 void
2124 tputtab(bool forward) {
2125 uint x = term.c.x;
2126
2127 if(forward) {
2128 if(x == term.col)
2129 return;
2130 for(++x; x < term.col && !term.tabs[x]; ++x)
2131 /* nothing */ ;
2132 } else {
2133 if(x == 0)
2134 return;
2135 for(--x; x > 0 && !term.tabs[x]; --x)
2136 /* nothing */ ;
2137 }
2138 tmoveto(x, term.c.y);
2139 }
2140
2141 void
2142 techo(char *buf, int len) {
2143 for(; len > 0; buf++, len--) {
2144 char c = *buf;
2145
2146 if(c == '\033') { /* escape */
2147 tputc("^", 1);
2148 tputc("[", 1);
2149 } else if(c < '\x20') { /* control code */
2150 if(c != '\n' && c != '\r' && c != '\t') {
2151 c |= '\x40';
2152 tputc("^", 1);
2153 }
2154 tputc(&c, 1);
2155 } else {
2156 break;
2157 }
2158 }
2159 if(len)
2160 tputc(buf, len);
2161 }
2162
2163 void
2164 tputc(char *c, int len) {
2165 uchar ascii = *c;
2166 bool control = ascii < '\x20' || ascii == 0177;
2167
2168 if(iofd != -1) {
2169 if(xwrite(iofd, c, len) < 0) {
2170 fprintf(stderr, "Error writing in %s:%s\n",
2171 opt_io, strerror(errno));
2172 close(iofd);
2173 iofd = -1;
2174 }
2175 }
2176
2177 /*
2178 * STR sequences must be checked before anything else
2179 * because it can use some control codes as part of the sequence.
2180 */
2181 if(term.esc & ESC_STR) {
2182 switch(ascii) {
2183 case '\033':
2184 term.esc = ESC_START | ESC_STR_END;
2185 break;
2186 case '\a': /* backwards compatibility to xterm */
2187 term.esc = 0;
2188 strhandle();
2189 break;
2190 default:
2191 if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2192 memmove(&strescseq.buf[strescseq.len], c, len);
2193 strescseq.len += len;
2194 } else {
2195 /*
2196 * Here is a bug in terminals. If the user never sends
2197 * some code to stop the str or esc command, then st
2198 * will stop responding. But this is better than
2199 * silently failing with unknown characters. At least
2200 * then users will report back.
2201 *
2202 * In the case users ever get fixed, here is the code:
2203 */
2204 /*
2205 * term.esc = 0;
2206 * strhandle();
2207 */
2208 }
2209 }
2210 return;
2211 }
2212
2213 /*
2214 * Actions of control codes must be performed as soon they arrive
2215 * because they can be embedded inside a control sequence, and
2216 * they must not cause conflicts with sequences.
2217 */
2218 if(control) {
2219 switch(ascii) {
2220 case '\t': /* HT */
2221 tputtab(1);
2222 return;
2223 case '\b': /* BS */
2224 tmoveto(term.c.x-1, term.c.y);
2225 return;
2226 case '\r': /* CR */
2227 tmoveto(0, term.c.y);
2228 return;
2229 case '\f': /* LF */
2230 case '\v': /* VT */
2231 case '\n': /* LF */
2232 /* go to first col if the mode is set */
2233 tnewline(IS_SET(MODE_CRLF));
2234 return;
2235 case '\a': /* BEL */
2236 if(!(xw.state & WIN_FOCUSED))
2237 xseturgency(1);
2238 return;
2239 case '\033': /* ESC */
2240 csireset();
2241 term.esc = ESC_START;
2242 return;
2243 case '\016': /* SO */
2244 case '\017': /* SI */
2245 /*
2246 * Different charsets are hard to handle. Applications
2247 * should use the right alt charset escapes for the
2248 * only reason they still exist: line drawing. The
2249 * rest is incompatible history st should not support.
2250 */
2251 return;
2252 case '\032': /* SUB */
2253 case '\030': /* CAN */
2254 csireset();
2255 return;
2256 case '\005': /* ENQ (IGNORED) */
2257 case '\000': /* NUL (IGNORED) */
2258 case '\021': /* XON (IGNORED) */
2259 case '\023': /* XOFF (IGNORED) */
2260 case 0177: /* DEL (IGNORED) */
2261 return;
2262 }
2263 } else if(term.esc & ESC_START) {
2264 if(term.esc & ESC_CSI) {
2265 csiescseq.buf[csiescseq.len++] = ascii;
2266 if(BETWEEN(ascii, 0x40, 0x7E)
2267 || csiescseq.len >= \
2268 sizeof(csiescseq.buf)-1) {
2269 term.esc = 0;
2270 csiparse();
2271 csihandle();
2272 }
2273 } else if(term.esc & ESC_STR_END) {
2274 term.esc = 0;
2275 if(ascii == '\\')
2276 strhandle();
2277 } else if(term.esc & ESC_ALTCHARSET) {
2278 switch(ascii) {
2279 case '0': /* Line drawing set */
2280 term.c.attr.mode |= ATTR_GFX;
2281 break;
2282 case 'B': /* USASCII */
2283 term.c.attr.mode &= ~ATTR_GFX;
2284 break;
2285 case 'A': /* UK (IGNORED) */
2286 case '<': /* multinational charset (IGNORED) */
2287 case '5': /* Finnish (IGNORED) */
2288 case 'C': /* Finnish (IGNORED) */
2289 case 'K': /* German (IGNORED) */
2290 break;
2291 default:
2292 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2293 }
2294 term.esc = 0;
2295 } else if(term.esc & ESC_TEST) {
2296 if(ascii == '8') { /* DEC screen alignment test. */
2297 char E[UTF_SIZ] = "E";
2298 int x, y;
2299
2300 for(x = 0; x < term.col; ++x) {
2301 for(y = 0; y < term.row; ++y)
2302 tsetchar(E, &term.c.attr, x, y);
2303 }
2304 }
2305 term.esc = 0;
2306 } else {
2307 switch(ascii) {
2308 case '[':
2309 term.esc |= ESC_CSI;
2310 break;
2311 case '#':
2312 term.esc |= ESC_TEST;
2313 break;
2314 case 'P': /* DCS -- Device Control String */
2315 case '_': /* APC -- Application Program Command */
2316 case '^': /* PM -- Privacy Message */
2317 case ']': /* OSC -- Operating System Command */
2318 case 'k': /* old title set compatibility */
2319 strreset();
2320 strescseq.type = ascii;
2321 term.esc |= ESC_STR;
2322 break;
2323 case '(': /* set primary charset G0 */
2324 term.esc |= ESC_ALTCHARSET;
2325 break;
2326 case ')': /* set secondary charset G1 (IGNORED) */
2327 case '*': /* set tertiary charset G2 (IGNORED) */
2328 case '+': /* set quaternary charset G3 (IGNORED) */
2329 term.esc = 0;
2330 break;
2331 case 'D': /* IND -- Linefeed */
2332 if(term.c.y == term.bot) {
2333 tscrollup(term.top, 1);
2334 } else {
2335 tmoveto(term.c.x, term.c.y+1);
2336 }
2337 term.esc = 0;
2338 break;
2339 case 'E': /* NEL -- Next line */
2340 tnewline(1); /* always go to first col */
2341 term.esc = 0;
2342 break;
2343 case 'H': /* HTS -- Horizontal tab stop */
2344 term.tabs[term.c.x] = 1;
2345 term.esc = 0;
2346 break;
2347 case 'M': /* RI -- Reverse index */
2348 if(term.c.y == term.top) {
2349 tscrolldown(term.top, 1);
2350 } else {
2351 tmoveto(term.c.x, term.c.y-1);
2352 }
2353 term.esc = 0;
2354 break;
2355 case 'Z': /* DECID -- Identify Terminal */
2356 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2357 term.esc = 0;
2358 break;
2359 case 'c': /* RIS -- Reset to inital state */
2360 treset();
2361 term.esc = 0;
2362 xresettitle();
2363 break;
2364 case '=': /* DECPAM -- Application keypad */
2365 term.mode |= MODE_APPKEYPAD;
2366 term.esc = 0;
2367 break;
2368 case '>': /* DECPNM -- Normal keypad */
2369 term.mode &= ~MODE_APPKEYPAD;
2370 term.esc = 0;
2371 break;
2372 case '7': /* DECSC -- Save Cursor */
2373 tcursor(CURSOR_SAVE);
2374 term.esc = 0;
2375 break;
2376 case '8': /* DECRC -- Restore Cursor */
2377 tcursor(CURSOR_LOAD);
2378 term.esc = 0;
2379 break;
2380 case '\\': /* ST -- Stop */
2381 term.esc = 0;
2382 break;
2383 default:
2384 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2385 (uchar) ascii, isprint(ascii)? ascii:'.');
2386 term.esc = 0;
2387 }
2388 }
2389 /*
2390 * All characters which form part of a sequence are not
2391 * printed
2392 */
2393 return;
2394 }
2395 /*
2396 * Display control codes only if we are in graphic mode
2397 */
2398 if(control && !(term.c.attr.mode & ATTR_GFX))
2399 return;
2400 if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
2401 sel.bx = -1;
2402 if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2403 term.line[term.c.y][term.c.x].mode |= ATTR_WRAP;
2404 tnewline(1);
2405 }
2406
2407 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col) {
2408 memmove(&term.line[term.c.y][term.c.x+1],
2409 &term.line[term.c.y][term.c.x],
2410 (term.col - term.c.x - 1) * sizeof(Glyph));
2411 }
2412
2413 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2414 if(term.c.x+1 < term.col) {
2415 tmoveto(term.c.x+1, term.c.y);
2416 } else {
2417 term.c.state |= CURSOR_WRAPNEXT;
2418 }
2419 }
2420
2421 int
2422 tresize(int col, int row) {
2423 int i;
2424 int minrow = MIN(row, term.row);
2425 int mincol = MIN(col, term.col);
2426 int slide = term.c.y - row + 1;
2427 bool *bp;
2428 Line *orig;
2429
2430 if(col < 1 || row < 1)
2431 return 0;
2432
2433 /* free unneeded rows */
2434 i = 0;
2435 if(slide > 0) {
2436 /*
2437 * slide screen to keep cursor where we expect it -
2438 * tscrollup would work here, but we can optimize to
2439 * memmove because we're freeing the earlier lines
2440 */
2441 for(/* i = 0 */; i < slide; i++) {
2442 free(term.line[i]);
2443 free(term.alt[i]);
2444 }
2445 memmove(term.line, term.line + slide, row * sizeof(Line));
2446 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2447 }
2448 for(i += row; i < term.row; i++) {
2449 free(term.line[i]);
2450 free(term.alt[i]);
2451 }
2452
2453 /* resize to new height */
2454 term.line = xrealloc(term.line, row * sizeof(Line));
2455 term.alt = xrealloc(term.alt, row * sizeof(Line));
2456 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2457 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2458
2459 /* resize each row to new width, zero-pad if needed */
2460 for(i = 0; i < minrow; i++) {
2461 term.dirty[i] = 1;
2462 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2463 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2464 }
2465
2466 /* allocate any new rows */
2467 for(/* i == minrow */; i < row; i++) {
2468 term.dirty[i] = 1;
2469 term.line[i] = xcalloc(col, sizeof(Glyph));
2470 term.alt [i] = xcalloc(col, sizeof(Glyph));
2471 }
2472 if(col > term.col) {
2473 bp = term.tabs + term.col;
2474
2475 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2476 while(--bp > term.tabs && !*bp)
2477 /* nothing */ ;
2478 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2479 *bp = 1;
2480 }
2481 /* update terminal size */
2482 term.col = col;
2483 term.row = row;
2484 /* reset scrolling region */
2485 tsetscroll(0, row-1);
2486 /* make use of the LIMIT in tmoveto */
2487 tmoveto(term.c.x, term.c.y);
2488 /* Clearing both screens */
2489 orig = term.line;
2490 do {
2491 if(mincol < col && 0 < minrow) {
2492 tclearregion(mincol, 0, col - 1, minrow - 1);
2493 }
2494 if(0 < col && minrow < row) {
2495 tclearregion(0, minrow, col - 1, row - 1);
2496 }
2497 tswapscreen();
2498 } while(orig != term.line);
2499
2500 return (slide > 0);
2501 }
2502
2503 void
2504 xresize(int col, int row) {
2505 xw.tw = MAX(1, col * xw.cw);
2506 xw.th = MAX(1, row * xw.ch);
2507
2508 XFreePixmap(xw.dpy, xw.buf);
2509 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2510 DefaultDepth(xw.dpy, xw.scr));
2511 XftDrawChange(xw.draw, xw.buf);
2512 xclear(0, 0, xw.w, xw.h);
2513 }
2514
2515 static inline ushort
2516 sixd_to_16bit(int x) {
2517 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2518 }
2519
2520 void
2521 xloadcols(void) {
2522 int i, r, g, b;
2523 XRenderColor color = { .alpha = 0xffff };
2524
2525 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
2526 for(i = 0; i < LEN(colorname); i++) {
2527 if(!colorname[i])
2528 continue;
2529 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2530 die("Could not allocate color '%s'\n", colorname[i]);
2531 }
2532 }
2533
2534 /* load colors [16-255] ; same colors as xterm */
2535 for(i = 16, r = 0; r < 6; r++) {
2536 for(g = 0; g < 6; g++) {
2537 for(b = 0; b < 6; b++) {
2538 color.red = sixd_to_16bit(r);
2539 color.green = sixd_to_16bit(g);
2540 color.blue = sixd_to_16bit(b);
2541 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i])) {
2542 die("Could not allocate color %d\n", i);
2543 }
2544 i++;
2545 }
2546 }
2547 }
2548
2549 for(r = 0; r < 24; r++, i++) {
2550 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
2551 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color,
2552 &dc.col[i])) {
2553 die("Could not allocate color %d\n", i);
2554 }
2555 }
2556 }
2557
2558 int
2559 xsetcolorname(int x, const char *name) {
2560 XRenderColor color = { .alpha = 0xffff };
2561 Colour colour;
2562 if (x < 0 || x > LEN(colorname))
2563 return -1;
2564 if(!name) {
2565 if(16 <= x && x < 16 + 216) {
2566 int r = (x - 16) / 36, g = ((x - 16) % 36) / 6, b = (x - 16) % 6;
2567 color.red = sixd_to_16bit(r);
2568 color.green = sixd_to_16bit(g);
2569 color.blue = sixd_to_16bit(b);
2570 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2571 return 0; /* something went wrong */
2572 dc.col[x] = colour;
2573 return 1;
2574 } else if (16 + 216 <= x && x < 256) {
2575 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (x - (16 + 216));
2576 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2577 return 0; /* something went wrong */
2578 dc.col[x] = colour;
2579 return 1;
2580 } else {
2581 name = colorname[x];
2582 }
2583 }
2584 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &colour))
2585 return 0;
2586 dc.col[x] = colour;
2587 return 1;
2588 }
2589
2590 void
2591 xtermclear(int col1, int row1, int col2, int row2) {
2592 XftDrawRect(xw.draw,
2593 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2594 borderpx + col1 * xw.cw,
2595 borderpx + row1 * xw.ch,
2596 (col2-col1+1) * xw.cw,
2597 (row2-row1+1) * xw.ch);
2598 }
2599
2600 /*
2601 * Absolute coordinates.
2602 */
2603 void
2604 xclear(int x1, int y1, int x2, int y2) {
2605 XftDrawRect(xw.draw,
2606 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2607 x1, y1, x2-x1, y2-y1);
2608 }
2609
2610 void
2611 xhints(void) {
2612 XClassHint class = {opt_class ? opt_class : termname, termname};
2613 XWMHints wm = {.flags = InputHint, .input = 1};
2614 XSizeHints *sizeh = NULL;
2615
2616 sizeh = XAllocSizeHints();
2617 if(xw.isfixed == False) {
2618 sizeh->flags = PSize | PResizeInc | PBaseSize;
2619 sizeh->height = xw.h;
2620 sizeh->width = xw.w;
2621 sizeh->height_inc = xw.ch;
2622 sizeh->width_inc = xw.cw;
2623 sizeh->base_height = 2 * borderpx;
2624 sizeh->base_width = 2 * borderpx;
2625 } else {
2626 sizeh->flags = PMaxSize | PMinSize;
2627 sizeh->min_width = sizeh->max_width = xw.fw;
2628 sizeh->min_height = sizeh->max_height = xw.fh;
2629 }
2630
2631 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
2632 XFree(sizeh);
2633 }
2634
2635 int
2636 xloadfont(Font *f, FcPattern *pattern) {
2637 FcPattern *match;
2638 FcResult result;
2639
2640 match = FcFontMatch(NULL, pattern, &result);
2641 if(!match)
2642 return 1;
2643
2644 if(!(f->set = FcFontSort(0, match, FcTrue, 0, &result))) {
2645 FcPatternDestroy(match);
2646 return 1;
2647 }
2648
2649 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2650 FcPatternDestroy(match);
2651 return 1;
2652 }
2653
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 void
2729 xunloadfonts(void) {
2730 int i, ip;
2731
2732 /*
2733 * Free the loaded fonts in the font cache. This is done backwards
2734 * from the frccur.
2735 */
2736 for(i = 0, ip = frccur; i < frclen; i++, ip--) {
2737 if(ip < 0)
2738 ip = LEN(frc) - 1;
2739 XftFontClose(xw.dpy, frc[ip].font);
2740 }
2741 frccur = -1;
2742 frclen = 0;
2743
2744 XftFontClose(xw.dpy, dc.font.match);
2745 FcPatternDestroy(dc.font.pattern);
2746 FcFontSetDestroy(dc.font.set);
2747 XftFontClose(xw.dpy, dc.bfont.match);
2748 FcPatternDestroy(dc.bfont.pattern);
2749 FcFontSetDestroy(dc.bfont.set);
2750 XftFontClose(xw.dpy, dc.ifont.match);
2751 FcPatternDestroy(dc.ifont.pattern);
2752 FcFontSetDestroy(dc.ifont.set);
2753 XftFontClose(xw.dpy, dc.ibfont.match);
2754 FcPatternDestroy(dc.ibfont.pattern);
2755 FcFontSetDestroy(dc.ibfont.set);
2756 }
2757
2758 void
2759 xzoom(const Arg *arg) {
2760 xunloadfonts();
2761 xloadfonts(usedfont, usedfontsize + arg->i);
2762 cresize(0, 0);
2763 redraw(0);
2764 }
2765
2766 void
2767 xinit(void) {
2768 XSetWindowAttributes attrs;
2769 XGCValues gcvalues;
2770 Cursor cursor;
2771 Window parent;
2772 int sw, sh;
2773
2774 if(!(xw.dpy = XOpenDisplay(NULL)))
2775 die("Can't open display\n");
2776 xw.scr = XDefaultScreen(xw.dpy);
2777 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
2778
2779 /* font */
2780 if(!FcInit())
2781 die("Could not init fontconfig.\n");
2782
2783 usedfont = (opt_font == NULL)? font : opt_font;
2784 xloadfonts(usedfont, 0);
2785
2786 /* colors */
2787 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
2788 xloadcols();
2789
2790 /* adjust fixed window geometry */
2791 if(xw.isfixed) {
2792 sw = DisplayWidth(xw.dpy, xw.scr);
2793 sh = DisplayHeight(xw.dpy, xw.scr);
2794 if(xw.fx < 0)
2795 xw.fx = sw + xw.fx - xw.fw - 1;
2796 if(xw.fy < 0)
2797 xw.fy = sh + xw.fy - xw.fh - 1;
2798
2799 xw.h = xw.fh;
2800 xw.w = xw.fw;
2801 } else {
2802 /* window - default size */
2803 xw.h = 2 * borderpx + term.row * xw.ch;
2804 xw.w = 2 * borderpx + term.col * xw.cw;
2805 xw.fx = 0;
2806 xw.fy = 0;
2807 }
2808
2809 /* Events */
2810 attrs.background_pixel = dc.col[defaultbg].pixel;
2811 attrs.border_pixel = dc.col[defaultbg].pixel;
2812 attrs.bit_gravity = NorthWestGravity;
2813 attrs.event_mask = FocusChangeMask | KeyPressMask
2814 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
2815 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
2816 attrs.colormap = xw.cmap;
2817
2818 parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
2819 XRootWindow(xw.dpy, xw.scr);
2820 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
2821 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
2822 xw.vis,
2823 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
2824 | CWColormap,
2825 &attrs);
2826
2827 memset(&gcvalues, 0, sizeof(gcvalues));
2828 gcvalues.graphics_exposures = False;
2829 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
2830 &gcvalues);
2831 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2832 DefaultDepth(xw.dpy, xw.scr));
2833 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
2834 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
2835
2836 /* Xft rendering context */
2837 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
2838
2839 /* input methods */
2840 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2841 XSetLocaleModifiers("@im=local");
2842 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2843 XSetLocaleModifiers("@im=");
2844 if((xw.xim = XOpenIM(xw.dpy,
2845 NULL, NULL, NULL)) == NULL) {
2846 die("XOpenIM failed. Could not open input"
2847 " device.\n");
2848 }
2849 }
2850 }
2851 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
2852 | XIMStatusNothing, XNClientWindow, xw.win,
2853 XNFocusWindow, xw.win, NULL);
2854 if(xw.xic == NULL)
2855 die("XCreateIC failed. Could not obtain input method.\n");
2856
2857 /* white cursor, black outline */
2858 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
2859 XDefineCursor(xw.dpy, xw.win, cursor);
2860 XRecolorCursor(xw.dpy, cursor,
2861 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
2862 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
2863
2864 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
2865 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
2866 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
2867
2868 xresettitle();
2869 XMapWindow(xw.dpy, xw.win);
2870 xhints();
2871 XSync(xw.dpy, 0);
2872 }
2873
2874 void
2875 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
2876 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
2877 width = charlen * xw.cw, xp, i;
2878 int frp, frcflags;
2879 int u8fl, u8fblen, u8cblen, doesexist;
2880 char *u8c, *u8fs;
2881 long u8char;
2882 Font *font = &dc.font;
2883 FcResult fcres;
2884 FcPattern *fcpattern, *fontpattern;
2885 FcFontSet *fcsets[] = { NULL };
2886 FcCharSet *fccharset;
2887 Colour *fg, *bg, *temp, revfg, revbg;
2888 XRenderColor colfg, colbg;
2889 Rectangle r;
2890
2891 frcflags = FRC_NORMAL;
2892
2893 if(base.mode & ATTR_ITALIC) {
2894 if(base.fg == defaultfg)
2895 base.fg = defaultitalic;
2896 font = &dc.ifont;
2897 frcflags = FRC_ITALIC;
2898 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
2899 if(base.fg == defaultfg)
2900 base.fg = defaultitalic;
2901 font = &dc.ibfont;
2902 frcflags = FRC_ITALICBOLD;
2903 } else if(base.mode & ATTR_UNDERLINE) {
2904 if(base.fg == defaultfg)
2905 base.fg = defaultunderline;
2906 }
2907 fg = &dc.col[base.fg];
2908 bg = &dc.col[base.bg];
2909
2910 if(base.mode & ATTR_BOLD) {
2911 if(BETWEEN(base.fg, 0, 7)) {
2912 /* basic system colors */
2913 fg = &dc.col[base.fg + 8];
2914 } else if(BETWEEN(base.fg, 16, 195)) {
2915 /* 256 colors */
2916 fg = &dc.col[base.fg + 36];
2917 } else if(BETWEEN(base.fg, 232, 251)) {
2918 /* greyscale */
2919 fg = &dc.col[base.fg + 4];
2920 }
2921 /*
2922 * Those ranges will not be brightened:
2923 * 8 - 15 – bright system colors
2924 * 196 - 231 – highest 256 color cube
2925 * 252 - 255 – brightest colors in greyscale
2926 */
2927 font = &dc.bfont;
2928 frcflags = FRC_BOLD;
2929 }
2930
2931 if(IS_SET(MODE_REVERSE)) {
2932 if(fg == &dc.col[defaultfg]) {
2933 fg = &dc.col[defaultbg];
2934 } else {
2935 colfg.red = ~fg->color.red;
2936 colfg.green = ~fg->color.green;
2937 colfg.blue = ~fg->color.blue;
2938 colfg.alpha = fg->color.alpha;
2939 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
2940 fg = &revfg;
2941 }
2942
2943 if(bg == &dc.col[defaultbg]) {
2944 bg = &dc.col[defaultfg];
2945 } else {
2946 colbg.red = ~bg->color.red;
2947 colbg.green = ~bg->color.green;
2948 colbg.blue = ~bg->color.blue;
2949 colbg.alpha = bg->color.alpha;
2950 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &revbg);
2951 bg = &revbg;
2952 }
2953 }
2954
2955 if(base.mode & ATTR_REVERSE) {
2956 temp = fg;
2957 fg = bg;
2958 bg = temp;
2959 }
2960
2961 if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
2962 fg = bg;
2963
2964 /* Intelligent cleaning up of the borders. */
2965 if(x == 0) {
2966 xclear(0, (y == 0)? 0 : winy, borderpx,
2967 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
2968 }
2969 if(x + charlen >= term.col) {
2970 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
2971 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
2972 }
2973 if(y == 0)
2974 xclear(winx, 0, winx + width, borderpx);
2975 if(y == term.row-1)
2976 xclear(winx, winy + xw.ch, winx + width, xw.h);
2977
2978 /* Clean up the region we want to draw to. */
2979 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
2980
2981 /* Set the clip region because Xft is sometimes dirty. */
2982 r.x = 0;
2983 r.y = 0;
2984 r.height = xw.ch;
2985 r.width = width;
2986 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
2987
2988 fcsets[0] = font->set;
2989 for(xp = winx; bytelen > 0;) {
2990 /*
2991 * Search for the range in the to be printed string of glyphs
2992 * that are in the main font. Then print that range. If
2993 * some glyph is found that is not in the font, do the
2994 * fallback dance.
2995 */
2996 u8fs = s;
2997 u8fblen = 0;
2998 u8fl = 0;
2999 for(;;) {
3000 u8c = s;
3001 u8cblen = utf8decode(s, &u8char);
3002 s += u8cblen;
3003 bytelen -= u8cblen;
3004
3005 doesexist = XftCharIndex(xw.dpy, font->match, u8char);
3006 if(!doesexist || bytelen <= 0) {
3007 if(bytelen <= 0) {
3008 if(doesexist) {
3009 u8fl++;
3010 u8fblen += u8cblen;
3011 }
3012 }
3013
3014 if(u8fl > 0) {
3015 XftDrawStringUtf8(xw.draw, fg,
3016 font->match, xp,
3017 winy + font->ascent,
3018 (FcChar8 *)u8fs,
3019 u8fblen);
3020 xp += font->width * u8fl;
3021
3022 }
3023 break;
3024 }
3025
3026 u8fl++;
3027 u8fblen += u8cblen;
3028 }
3029 if(doesexist)
3030 break;
3031
3032 frp = frccur;
3033 /* Search the font cache. */
3034 for(i = 0; i < frclen; i++, frp--) {
3035 if(frp <= 0)
3036 frp = LEN(frc) - 1;
3037
3038 if(frc[frp].c == u8char
3039 && frc[frp].flags == frcflags) {
3040 break;
3041 }
3042 }
3043
3044 /* Nothing was found. */
3045 if(i >= frclen) {
3046 /*
3047 * Nothing was found in the cache. Now use
3048 * some dozen of Fontconfig calls to get the
3049 * font for one single character.
3050 */
3051 fcpattern = FcPatternDuplicate(font->pattern);
3052 fccharset = FcCharSetCreate();
3053
3054 FcCharSetAddChar(fccharset, u8char);
3055 FcPatternAddCharSet(fcpattern, FC_CHARSET,
3056 fccharset);
3057 FcPatternAddBool(fcpattern, FC_SCALABLE,
3058 FcTrue);
3059
3060 FcConfigSubstitute(0, fcpattern,
3061 FcMatchPattern);
3062 FcDefaultSubstitute(fcpattern);
3063
3064 fontpattern = FcFontSetMatch(0, fcsets,
3065 FcTrue, fcpattern, &fcres);
3066
3067 /*
3068 * Overwrite or create the new cache entry.
3069 */
3070 frccur++;
3071 frclen++;
3072 if(frccur >= LEN(frc))
3073 frccur = 0;
3074 if(frclen > LEN(frc)) {
3075 frclen = LEN(frc);
3076 XftFontClose(xw.dpy, frc[frccur].font);
3077 }
3078
3079 frc[frccur].font = XftFontOpenPattern(xw.dpy,
3080 fontpattern);
3081 frc[frccur].c = u8char;
3082 frc[frccur].flags = frcflags;
3083
3084 FcPatternDestroy(fcpattern);
3085 FcCharSetDestroy(fccharset);
3086
3087 frp = frccur;
3088 }
3089
3090 XftDrawStringUtf8(xw.draw, fg, frc[frp].font,
3091 xp, winy + frc[frp].font->ascent,
3092 (FcChar8 *)u8c, u8cblen);
3093
3094 xp += font->width;
3095 }
3096
3097 /*
3098 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
3099 winy + font->ascent, (FcChar8 *)s, bytelen);
3100 */
3101
3102 if(base.mode & ATTR_UNDERLINE) {
3103 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
3104 width, 1);
3105 }
3106
3107 /* Reset clip to none. */
3108 XftDrawSetClip(xw.draw, 0);
3109 }
3110
3111 void
3112 xdrawcursor(void) {
3113 static int oldx = 0, oldy = 0;
3114 int sl;
3115 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
3116
3117 LIMIT(oldx, 0, term.col-1);
3118 LIMIT(oldy, 0, term.row-1);
3119
3120 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
3121
3122 /* remove the old cursor */
3123 sl = utf8size(term.line[oldy][oldx].c);
3124 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
3125 oldy, 1, sl);
3126
3127 /* draw the new one */
3128 if(!(IS_SET(MODE_HIDE))) {
3129 if(xw.state & WIN_FOCUSED) {
3130 if(IS_SET(MODE_REVERSE)) {
3131 g.mode |= ATTR_REVERSE;
3132 g.fg = defaultcs;
3133 g.bg = defaultfg;
3134 }
3135
3136 sl = utf8size(g.c);
3137 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
3138 } else {
3139 XftDrawRect(xw.draw, &dc.col[defaultcs],
3140 borderpx + term.c.x * xw.cw,
3141 borderpx + term.c.y * xw.ch,
3142 xw.cw - 1, 1);
3143 XftDrawRect(xw.draw, &dc.col[defaultcs],
3144 borderpx + term.c.x * xw.cw,
3145 borderpx + term.c.y * xw.ch,
3146 1, xw.ch - 1);
3147 XftDrawRect(xw.draw, &dc.col[defaultcs],
3148 borderpx + (term.c.x + 1) * xw.cw - 1,
3149 borderpx + term.c.y * xw.ch,
3150 1, xw.ch - 1);
3151 XftDrawRect(xw.draw, &dc.col[defaultcs],
3152 borderpx + term.c.x * xw.cw,
3153 borderpx + (term.c.y + 1) * xw.ch - 1,
3154 xw.cw, 1);
3155 }
3156 oldx = term.c.x, oldy = term.c.y;
3157 }
3158 }
3159
3160
3161 void
3162 xsettitle(char *p) {
3163 XTextProperty prop;
3164
3165 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3166 &prop);
3167 XSetWMName(xw.dpy, xw.win, &prop);
3168 }
3169
3170 void
3171 xresettitle(void) {
3172 xsettitle(opt_title ? opt_title : "st");
3173 }
3174
3175 void
3176 redraw(int timeout) {
3177 struct timespec tv = {0, timeout * 1000};
3178
3179 tfulldirt();
3180 draw();
3181
3182 if(timeout > 0) {
3183 nanosleep(&tv, NULL);
3184 XSync(xw.dpy, False); /* necessary for a good tput flash */
3185 }
3186 }
3187
3188 void
3189 draw(void) {
3190 drawregion(0, 0, term.col, term.row);
3191 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3192 xw.h, 0, 0);
3193 XSetForeground(xw.dpy, dc.gc,
3194 dc.col[IS_SET(MODE_REVERSE)?
3195 defaultfg : defaultbg].pixel);
3196 }
3197
3198 void
3199 drawregion(int x1, int y1, int x2, int y2) {
3200 int ic, ib, x, y, ox, sl;
3201 Glyph base, new;
3202 char buf[DRAW_BUF_SIZ];
3203 bool ena_sel = sel.bx != -1;
3204
3205 if(sel.alt ^ IS_SET(MODE_ALTSCREEN))
3206 ena_sel = 0;
3207
3208 if(!(xw.state & WIN_VISIBLE))
3209 return;
3210
3211 for(y = y1; y < y2; y++) {
3212 if(!term.dirty[y])
3213 continue;
3214
3215 xtermclear(0, y, term.col, y);
3216 term.dirty[y] = 0;
3217 base = term.line[y][0];
3218 ic = ib = ox = 0;
3219 for(x = x1; x < x2; x++) {
3220 new = term.line[y][x];
3221 if(ena_sel && selected(x, y))
3222 new.mode ^= ATTR_REVERSE;
3223 if(ib > 0 && (ATTRCMP(base, new)
3224 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3225 xdraws(buf, base, ox, y, ic, ib);
3226 ic = ib = 0;
3227 }
3228 if(ib == 0) {
3229 ox = x;
3230 base = new;
3231 }
3232
3233 sl = utf8size(new.c);
3234 memcpy(buf+ib, new.c, sl);
3235 ib += sl;
3236 ++ic;
3237 }
3238 if(ib > 0)
3239 xdraws(buf, base, ox, y, ic, ib);
3240 }
3241 xdrawcursor();
3242 }
3243
3244 void
3245 expose(XEvent *ev) {
3246 XExposeEvent *e = &ev->xexpose;
3247
3248 if(xw.state & WIN_REDRAW) {
3249 if(!e->count)
3250 xw.state &= ~WIN_REDRAW;
3251 }
3252 redraw(0);
3253 }
3254
3255 void
3256 visibility(XEvent *ev) {
3257 XVisibilityEvent *e = &ev->xvisibility;
3258
3259 if(e->state == VisibilityFullyObscured) {
3260 xw.state &= ~WIN_VISIBLE;
3261 } else if(!(xw.state & WIN_VISIBLE)) {
3262 /* need a full redraw for next Expose, not just a buf copy */
3263 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3264 }
3265 }
3266
3267 void
3268 unmap(XEvent *ev) {
3269 xw.state &= ~WIN_VISIBLE;
3270 }
3271
3272 void
3273 xseturgency(int add) {
3274 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3275
3276 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
3277 XSetWMHints(xw.dpy, xw.win, h);
3278 XFree(h);
3279 }
3280
3281 void
3282 focus(XEvent *ev) {
3283 XFocusChangeEvent *e = &ev->xfocus;
3284
3285 if(e->mode == NotifyGrab)
3286 return;
3287
3288 if(ev->type == FocusIn) {
3289 XSetICFocus(xw.xic);
3290 xw.state |= WIN_FOCUSED;
3291 xseturgency(0);
3292 } else {
3293 XUnsetICFocus(xw.xic);
3294 xw.state &= ~WIN_FOCUSED;
3295 }
3296 }
3297
3298 inline bool
3299 match(uint mask, uint state) {
3300 state &= ~(ignoremod);
3301
3302 if(mask == XK_NO_MOD && state)
3303 return false;
3304 if(mask != XK_ANY_MOD && mask != XK_NO_MOD && !state)
3305 return false;
3306 if((state & mask) != state)
3307 return false;
3308 return true;
3309 }
3310
3311 void
3312 numlock(const Arg *dummy) {
3313 term.numlock ^= 1;
3314 }
3315
3316 char*
3317 kmap(KeySym k, uint state) {
3318 uint mask;
3319 Key *kp;
3320 int i;
3321
3322 /* Check for mapped keys out of X11 function keys. */
3323 for(i = 0; i < LEN(mappedkeys); i++) {
3324 if(mappedkeys[i] == k)
3325 break;
3326 }
3327 if(i == LEN(mappedkeys)) {
3328 if((k & 0xFFFF) < 0xFD00)
3329 return NULL;
3330 }
3331
3332 for(kp = key; kp < key + LEN(key); kp++) {
3333 mask = kp->mask;
3334
3335 if(kp->k != k)
3336 continue;
3337
3338 if(!match(mask, state))
3339 continue;
3340
3341 if(kp->appkey > 0) {
3342 if(!IS_SET(MODE_APPKEYPAD))
3343 continue;
3344 if(term.numlock && kp->appkey == 2)
3345 continue;
3346 } else if(kp->appkey < 0 && IS_SET(MODE_APPKEYPAD)) {
3347 continue;
3348 }
3349
3350 if((kp->appcursor < 0 && IS_SET(MODE_APPCURSOR)) ||
3351 (kp->appcursor > 0
3352 && !IS_SET(MODE_APPCURSOR))) {
3353 continue;
3354 }
3355
3356 if((kp->crlf < 0 && IS_SET(MODE_CRLF)) ||
3357 (kp->crlf > 0 && !IS_SET(MODE_CRLF))) {
3358 continue;
3359 }
3360
3361 return kp->s;
3362 }
3363
3364 return NULL;
3365 }
3366
3367 void
3368 kpress(XEvent *ev) {
3369 XKeyEvent *e = &ev->xkey;
3370 KeySym ksym;
3371 char xstr[31], buf[32], *customkey, *cp = buf;
3372 int len, ret;
3373 long c;
3374 Status status;
3375 Shortcut *bp;
3376
3377 if(IS_SET(MODE_KBDLOCK))
3378 return;
3379
3380 len = XmbLookupString(xw.xic, e, xstr, sizeof(xstr), &ksym, &status);
3381 e->state &= ~Mod2Mask;
3382 /* 1. shortcuts */
3383 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3384 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3385 bp->func(&(bp->arg));
3386 return;
3387 }
3388 }
3389
3390 /* 2. custom keys from config.h */
3391 if((customkey = kmap(ksym, e->state))) {
3392 len = strlen(customkey);
3393 memcpy(buf, customkey, len);
3394 /* 3. hardcoded (overrides X lookup) */
3395 } else {
3396 if(len == 0)
3397 return;
3398
3399 if(len == 1 && e->state & Mod1Mask) {
3400 if(IS_SET(MODE_8BIT)) {
3401 if(*xstr < 0177) {
3402 c = *xstr | B7;
3403 ret = utf8encode(&c, cp);
3404 cp += ret;
3405 len = 0;
3406 }
3407 } else {
3408 *cp++ = '\033';
3409 }
3410 }
3411
3412 memcpy(cp, xstr, len);
3413 len = cp - buf + len;
3414 }
3415
3416 ttywrite(buf, len);
3417 if(IS_SET(MODE_ECHO))
3418 techo(buf, len);
3419 }
3420
3421
3422 void
3423 cmessage(XEvent *e) {
3424 /*
3425 * See xembed specs
3426 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3427 */
3428 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3429 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3430 xw.state |= WIN_FOCUSED;
3431 xseturgency(0);
3432 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3433 xw.state &= ~WIN_FOCUSED;
3434 }
3435 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3436 /* Send SIGHUP to shell */
3437 kill(pid, SIGHUP);
3438 exit(EXIT_SUCCESS);
3439 }
3440 }
3441
3442 void
3443 cresize(int width, int height) {
3444 int col, row;
3445
3446 if(width != 0)
3447 xw.w = width;
3448 if(height != 0)
3449 xw.h = height;
3450
3451 col = (xw.w - 2 * borderpx) / xw.cw;
3452 row = (xw.h - 2 * borderpx) / xw.ch;
3453
3454 tresize(col, row);
3455 xresize(col, row);
3456 ttyresize();
3457 }
3458
3459 void
3460 resize(XEvent *e) {
3461 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3462 return;
3463
3464 cresize(e->xconfigure.width, e->xconfigure.height);
3465 }
3466
3467 void
3468 run(void) {
3469 XEvent ev;
3470 fd_set rfd;
3471 int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3472 struct timeval drawtimeout, *tv = NULL, now, last, lastblink;
3473
3474 gettimeofday(&lastblink, NULL);
3475 gettimeofday(&last, NULL);
3476
3477 for(xev = actionfps;;) {
3478 FD_ZERO(&rfd);
3479 FD_SET(cmdfd, &rfd);
3480 FD_SET(xfd, &rfd);
3481
3482 switch(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
3483 case -1:
3484 if(errno == EINTR)
3485 continue;
3486 die("select failed: %s\n", SERRNO);
3487 default:
3488 if(FD_ISSET(cmdfd, &rfd)) {
3489 ttyread();
3490 if(blinktimeout) {
3491 blinkset = tattrset(ATTR_BLINK);
3492 if(!blinkset && term.mode & ATTR_BLINK)
3493 term.mode &= ~(MODE_BLINK);
3494 }
3495 }
3496
3497 if(FD_ISSET(xfd, &rfd))
3498 xev = actionfps;
3499 break;
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