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