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