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Fixing bad highlighting on first SNAP_WORD multiline select.
[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 if(sel.ob.y == sel.oe.y) {
671 sel.nb.x = MIN(sel.ob.x, sel.oe.x);
672 sel.ne.x = MAX(sel.ob.x, sel.oe.x);
673 } else {
674 sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
675 sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
676 }
677 sel.nb.y = MIN(sel.ob.y, sel.oe.y);
678 sel.ne.y = MAX(sel.ob.y, sel.oe.y);
679 }
680
681 static inline bool
682 selected(int x, int y) {
683 if(sel.ne.y == y && sel.nb.y == y)
684 return BETWEEN(x, sel.nb.x, sel.ne.x);
685
686 if(sel.type == SEL_RECTANGULAR) {
687 return ((sel.nb.y <= y && y <= sel.ne.y)
688 && (sel.nb.x <= x && x <= sel.ne.x));
689 }
690
691 return ((sel.nb.y < y && y < sel.ne.y)
692 || (y == sel.ne.y && x <= sel.ne.x))
693 || (y == sel.nb.y && x >= sel.nb.x
694 && (x <= sel.ne.x || sel.nb.y != sel.ne.y));
695 }
696
697 void
698 selsnap(int mode, int *x, int *y, int direction) {
699 int i;
700
701 switch(mode) {
702 case SNAP_WORD:
703 /*
704 * Snap around if the word wraps around at the end or
705 * beginning of a line.
706 */
707 for(;;) {
708 if(direction < 0 && *x <= 0) {
709 if(*y > 0 && term.line[*y - 1][term.col-1].mode
710 & ATTR_WRAP) {
711 *y -= 1;
712 *x = term.col-1;
713 } else {
714 break;
715 }
716 }
717 if(direction > 0 && *x >= term.col-1) {
718 if(*y < term.row-1 && term.line[*y][*x].mode
719 & ATTR_WRAP) {
720 *y += 1;
721 *x = 0;
722 } else {
723 break;
724 }
725 }
726
727 if(strchr(worddelimiters,
728 term.line[*y][*x + direction].c[0])) {
729 break;
730 }
731
732 *x += direction;
733 }
734 break;
735 case SNAP_LINE:
736 /*
737 * Snap around if the the previous line or the current one
738 * has set ATTR_WRAP at its end. Then the whole next or
739 * previous line will be selected.
740 */
741 *x = (direction < 0) ? 0 : term.col - 1;
742 if(direction < 0 && *y > 0) {
743 for(; *y > 0; *y += direction) {
744 if(!(term.line[*y-1][term.col-1].mode
745 & ATTR_WRAP)) {
746 break;
747 }
748 }
749 } else if(direction > 0 && *y < term.row-1) {
750 for(; *y < term.row; *y += direction) {
751 if(!(term.line[*y][term.col-1].mode
752 & ATTR_WRAP)) {
753 break;
754 }
755 }
756 }
757 break;
758 default:
759 /*
760 * Select the whole line when the end of line is reached.
761 */
762 if(direction > 0) {
763 i = term.col;
764 while(--i > 0 && term.line[*y][i].c[0] == ' ')
765 /* nothing */;
766 if(i > 0 && i < *x)
767 *x = term.col - 1;
768 }
769 break;
770 }
771 }
772
773 void
774 getbuttoninfo(XEvent *e) {
775 int type;
776 uint state = e->xbutton.state &~Button1Mask;
777
778 sel.alt = IS_SET(MODE_ALTSCREEN);
779
780 sel.oe.x = x2col(e->xbutton.x);
781 sel.oe.y = y2row(e->xbutton.y);
782
783 if(sel.ob.y < sel.oe.y
784 || (sel.ob.y == sel.oe.y && sel.ob.x < sel.oe.x)) {
785 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
786 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
787 } else {
788 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, -1);
789 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, +1);
790 }
791 selsort();
792
793 sel.type = SEL_REGULAR;
794 for(type = 1; type < LEN(selmasks); ++type) {
795 if(match(selmasks[type], state)) {
796 sel.type = type;
797 break;
798 }
799 }
800 }
801
802 void
803 mousereport(XEvent *e) {
804 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
805 button = e->xbutton.button, state = e->xbutton.state,
806 len;
807 char buf[40];
808 static int ob, ox, oy;
809
810 /* from urxvt */
811 if(e->xbutton.type == MotionNotify) {
812 if(!IS_SET(MODE_MOUSEMOTION) || (x == ox && y == oy))
813 return;
814 button = ob + 32;
815 ox = x;
816 oy = y;
817 } else if(!IS_SET(MODE_MOUSESGR)
818 && (e->xbutton.type == ButtonRelease
819 || button == AnyButton)) {
820 button = 3;
821 } else {
822 button -= Button1;
823 if(button >= 3)
824 button += 64 - 3;
825 if(e->xbutton.type == ButtonPress) {
826 ob = button;
827 ox = x;
828 oy = y;
829 }
830 }
831
832 button += (state & ShiftMask ? 4 : 0)
833 + (state & Mod4Mask ? 8 : 0)
834 + (state & ControlMask ? 16 : 0);
835
836 len = 0;
837 if(IS_SET(MODE_MOUSESGR)) {
838 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
839 button, x+1, y+1,
840 e->xbutton.type == ButtonRelease ? 'm' : 'M');
841 } else if(x < 223 && y < 223) {
842 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
843 32+button, 32+x+1, 32+y+1);
844 } else {
845 return;
846 }
847
848 ttywrite(buf, len);
849 }
850
851 void
852 bpress(XEvent *e) {
853 struct timeval now;
854 Mousekey *mk;
855
856 if(IS_SET(MODE_MOUSE)) {
857 mousereport(e);
858 return;
859 }
860
861 for(mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
862 if(e->xbutton.button == mk->b
863 && match(mk->mask, e->xbutton.state)) {
864 ttywrite(mk->s, strlen(mk->s));
865 if(IS_SET(MODE_ECHO))
866 techo(mk->s, strlen(mk->s));
867 return;
868 }
869 }
870
871 if(e->xbutton.button == Button1) {
872 gettimeofday(&now, NULL);
873
874 /* Clear previous selection, logically and visually. */
875 if(sel.ob.x != -1) {
876 sel.ob.x = -1;
877 tsetdirt(sel.nb.y, sel.ne.y);
878 draw();
879 }
880 sel.mode = 1;
881 sel.type = SEL_REGULAR;
882 sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
883 sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
884
885 /*
886 * If the user clicks below predefined timeouts specific
887 * snapping behaviour is exposed.
888 */
889 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
890 sel.snap = SNAP_LINE;
891 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
892 sel.snap = SNAP_WORD;
893 } else {
894 sel.snap = 0;
895 }
896 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
897 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
898 selsort();
899
900 /*
901 * Draw selection, unless it's regular and we don't want to
902 * make clicks visible
903 */
904 if(sel.snap != 0) {
905 sel.mode++;
906 tsetdirt(sel.nb.y, sel.ne.y);
907 draw();
908 }
909 sel.tclick2 = sel.tclick1;
910 sel.tclick1 = now;
911 }
912 }
913
914 void
915 selcopy(void) {
916 char *str, *ptr;
917 int x, y, bufsize, size, i, ex;
918 Glyph *gp, *last;
919
920 if(sel.ob.x == -1) {
921 str = NULL;
922 } else {
923 bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
924 ptr = str = xmalloc(bufsize);
925
926 /* append every set & selected glyph to the selection */
927 for(y = sel.nb.y; y < sel.ne.y + 1; y++) {
928 gp = &term.line[y][0];
929 last = gp + term.col;
930
931 while(--last >= gp && !(selected(last - gp, y) && \
932 strcmp(last->c, " ") != 0))
933 /* nothing */;
934
935 for(x = 0; gp <= last; x++, ++gp) {
936 if(!selected(x, y))
937 continue;
938
939 size = utf8size(gp->c);
940 memcpy(ptr, gp->c, size);
941 ptr += size;
942 }
943
944 /*
945 * Copy and pasting of line endings is inconsistent
946 * in the inconsistent terminal and GUI world.
947 * The best solution seems like to produce '\n' when
948 * something is copied from st and convert '\n' to
949 * '\r', when something to be pasted is received by
950 * st.
951 * FIXME: Fix the computer world.
952 */
953 if(y < sel.ne.y && !((gp-1)->mode & ATTR_WRAP))
954 *ptr++ = '\n';
955
956 /*
957 * If the last selected line expands in the selection
958 * after the visible text '\n' is appended.
959 */
960 if(y == sel.ne.y) {
961 i = term.col;
962 while(--i > 0 && term.line[y][i].c[0] == ' ')
963 /* nothing */;
964 ex = sel.ne.x;
965 if(sel.nb.y == sel.ne.y && sel.ne.x < sel.nb.x)
966 ex = sel.nb.x;
967 if(i < ex)
968 *ptr++ = '\n';
969 }
970 }
971 *ptr = 0;
972 }
973 xsetsel(str);
974 }
975
976 void
977 selnotify(XEvent *e) {
978 ulong nitems, ofs, rem;
979 int format;
980 uchar *data, *last, *repl;
981 Atom type;
982
983 ofs = 0;
984 do {
985 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
986 False, AnyPropertyType, &type, &format,
987 &nitems, &rem, &data)) {
988 fprintf(stderr, "Clipboard allocation failed\n");
989 return;
990 }
991
992 /*
993 * As seen in selcopy:
994 * Line endings are inconsistent in the terminal and GUI world
995 * copy and pasting. When receiving some selection data,
996 * replace all '\n' with '\r'.
997 * FIXME: Fix the computer world.
998 */
999 repl = data;
1000 last = data + nitems * format / 8;
1001 while((repl = memchr(repl, '\n', last - repl))) {
1002 *repl++ = '\r';
1003 }
1004
1005 ttywrite((const char *)data, nitems * format / 8);
1006 XFree(data);
1007 /* number of 32-bit chunks returned */
1008 ofs += nitems * format / 32;
1009 } while(rem > 0);
1010 }
1011
1012 void
1013 selpaste(const Arg *dummy) {
1014 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
1015 xw.win, CurrentTime);
1016 }
1017
1018 void
1019 clippaste(const Arg *dummy) {
1020 Atom clipboard;
1021
1022 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1023 XConvertSelection(xw.dpy, clipboard, sel.xtarget, XA_PRIMARY,
1024 xw.win, CurrentTime);
1025 }
1026
1027 void
1028 selclear(XEvent *e) {
1029 if(sel.ob.x == -1)
1030 return;
1031 sel.ob.x = -1;
1032 tsetdirt(sel.nb.y, sel.ne.y);
1033 }
1034
1035 void
1036 selrequest(XEvent *e) {
1037 XSelectionRequestEvent *xsre;
1038 XSelectionEvent xev;
1039 Atom xa_targets, string;
1040
1041 xsre = (XSelectionRequestEvent *) e;
1042 xev.type = SelectionNotify;
1043 xev.requestor = xsre->requestor;
1044 xev.selection = xsre->selection;
1045 xev.target = xsre->target;
1046 xev.time = xsre->time;
1047 /* reject */
1048 xev.property = None;
1049
1050 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
1051 if(xsre->target == xa_targets) {
1052 /* respond with the supported type */
1053 string = sel.xtarget;
1054 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1055 XA_ATOM, 32, PropModeReplace,
1056 (uchar *) &string, 1);
1057 xev.property = xsre->property;
1058 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
1059 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1060 xsre->target, 8, PropModeReplace,
1061 (uchar *) sel.clip, strlen(sel.clip));
1062 xev.property = xsre->property;
1063 }
1064
1065 /* all done, send a notification to the listener */
1066 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
1067 fprintf(stderr, "Error sending SelectionNotify event\n");
1068 }
1069
1070 void
1071 xsetsel(char *str) {
1072 /* register the selection for both the clipboard and the primary */
1073 Atom clipboard;
1074
1075 free(sel.clip);
1076 sel.clip = str;
1077
1078 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
1079
1080 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1081 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
1082 }
1083
1084 void
1085 brelease(XEvent *e) {
1086 if(IS_SET(MODE_MOUSE)) {
1087 mousereport(e);
1088 return;
1089 }
1090
1091 if(e->xbutton.button == Button2) {
1092 selpaste(NULL);
1093 } else if(e->xbutton.button == Button1) {
1094 if(sel.mode < 2) {
1095 sel.ob.x = -1;
1096 } else {
1097 getbuttoninfo(e);
1098 selcopy();
1099 }
1100 sel.mode = 0;
1101 tsetdirt(sel.nb.y, sel.ne.y);
1102 }
1103 }
1104
1105 void
1106 bmotion(XEvent *e) {
1107 int oldey, oldex, oldsby, oldsey;
1108
1109 if(IS_SET(MODE_MOUSE)) {
1110 mousereport(e);
1111 return;
1112 }
1113
1114 if(!sel.mode)
1115 return;
1116
1117 sel.mode++;
1118 oldey = sel.oe.y;
1119 oldex = sel.oe.x;
1120 oldsby = sel.nb.y;
1121 oldsey = sel.ne.y;
1122 getbuttoninfo(e);
1123
1124 if(oldey != sel.oe.y || oldex != sel.oe.x)
1125 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
1126 }
1127
1128 void
1129 die(const char *errstr, ...) {
1130 va_list ap;
1131
1132 va_start(ap, errstr);
1133 vfprintf(stderr, errstr, ap);
1134 va_end(ap);
1135 exit(EXIT_FAILURE);
1136 }
1137
1138 void
1139 execsh(void) {
1140 char **args;
1141 char *envshell = getenv("SHELL");
1142 const struct passwd *pass = getpwuid(getuid());
1143 char buf[sizeof(long) * 8 + 1];
1144
1145 unsetenv("COLUMNS");
1146 unsetenv("LINES");
1147 unsetenv("TERMCAP");
1148
1149 if(pass) {
1150 setenv("LOGNAME", pass->pw_name, 1);
1151 setenv("USER", pass->pw_name, 1);
1152 setenv("SHELL", pass->pw_shell, 0);
1153 setenv("HOME", pass->pw_dir, 0);
1154 }
1155
1156 snprintf(buf, sizeof(buf), "%lu", xw.win);
1157 setenv("WINDOWID", buf, 1);
1158
1159 signal(SIGCHLD, SIG_DFL);
1160 signal(SIGHUP, SIG_DFL);
1161 signal(SIGINT, SIG_DFL);
1162 signal(SIGQUIT, SIG_DFL);
1163 signal(SIGTERM, SIG_DFL);
1164 signal(SIGALRM, SIG_DFL);
1165
1166 DEFAULT(envshell, shell);
1167 setenv("TERM", termname, 1);
1168 args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
1169 execvp(args[0], args);
1170 exit(EXIT_FAILURE);
1171 }
1172
1173 void
1174 sigchld(int a) {
1175 int stat = 0;
1176
1177 if(waitpid(pid, &stat, 0) < 0)
1178 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
1179
1180 if(WIFEXITED(stat)) {
1181 exit(WEXITSTATUS(stat));
1182 } else {
1183 exit(EXIT_FAILURE);
1184 }
1185 }
1186
1187 void
1188 ttynew(void) {
1189 int m, s;
1190 struct winsize w = {term.row, term.col, 0, 0};
1191
1192 /* seems to work fine on linux, openbsd and freebsd */
1193 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1194 die("openpty failed: %s\n", SERRNO);
1195
1196 switch(pid = fork()) {
1197 case -1:
1198 die("fork failed\n");
1199 break;
1200 case 0:
1201 setsid(); /* create a new process group */
1202 dup2(s, STDIN_FILENO);
1203 dup2(s, STDOUT_FILENO);
1204 dup2(s, STDERR_FILENO);
1205 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1206 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
1207 close(s);
1208 close(m);
1209 execsh();
1210 break;
1211 default:
1212 close(s);
1213 cmdfd = m;
1214 signal(SIGCHLD, sigchld);
1215 if(opt_io) {
1216 iofd = (!strcmp(opt_io, "-")) ?
1217 STDOUT_FILENO :
1218 open(opt_io, O_WRONLY | O_CREAT, 0666);
1219 if(iofd < 0) {
1220 fprintf(stderr, "Error opening %s:%s\n",
1221 opt_io, strerror(errno));
1222 }
1223 }
1224 }
1225 }
1226
1227 void
1228 dump(char c) {
1229 static int col;
1230
1231 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
1232 if(++col % 10 == 0)
1233 fprintf(stderr, "\n");
1234 }
1235
1236 void
1237 ttyread(void) {
1238 static char buf[BUFSIZ];
1239 static int buflen = 0;
1240 char *ptr;
1241 char s[UTF_SIZ];
1242 int charsize; /* size of utf8 char in bytes */
1243 long utf8c;
1244 int ret;
1245
1246 /* append read bytes to unprocessed bytes */
1247 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1248 die("Couldn't read from shell: %s\n", SERRNO);
1249
1250 /* process every complete utf8 char */
1251 buflen += ret;
1252 ptr = buf;
1253 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
1254 charsize = utf8decode(ptr, &utf8c);
1255 utf8encode(&utf8c, s);
1256 tputc(s, charsize);
1257 ptr += charsize;
1258 buflen -= charsize;
1259 }
1260
1261 /* keep any uncomplete utf8 char for the next call */
1262 memmove(buf, ptr, buflen);
1263 }
1264
1265 void
1266 ttywrite(const char *s, size_t n) {
1267 if(write(cmdfd, s, n) == -1)
1268 die("write error on tty: %s\n", SERRNO);
1269 }
1270
1271 void
1272 ttyresize(void) {
1273 struct winsize w;
1274
1275 w.ws_row = term.row;
1276 w.ws_col = term.col;
1277 w.ws_xpixel = xw.tw;
1278 w.ws_ypixel = xw.th;
1279 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1280 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
1281 }
1282
1283 int
1284 tattrset(int attr) {
1285 int i, j;
1286
1287 for(i = 0; i < term.row-1; i++) {
1288 for(j = 0; j < term.col-1; j++) {
1289 if(term.line[i][j].mode & attr)
1290 return 1;
1291 }
1292 }
1293
1294 return 0;
1295 }
1296
1297 void
1298 tsetdirt(int top, int bot) {
1299 int i;
1300
1301 LIMIT(top, 0, term.row-1);
1302 LIMIT(bot, 0, term.row-1);
1303
1304 for(i = top; i <= bot; i++)
1305 term.dirty[i] = 1;
1306 }
1307
1308 void
1309 tsetdirtattr(int attr) {
1310 int i, j;
1311
1312 for(i = 0; i < term.row-1; i++) {
1313 for(j = 0; j < term.col-1; j++) {
1314 if(term.line[i][j].mode & attr) {
1315 tsetdirt(i, i);
1316 break;
1317 }
1318 }
1319 }
1320 }
1321
1322 void
1323 tfulldirt(void) {
1324 tsetdirt(0, term.row-1);
1325 }
1326
1327 void
1328 tcursor(int mode) {
1329 static TCursor c;
1330
1331 if(mode == CURSOR_SAVE) {
1332 c = term.c;
1333 } else if(mode == CURSOR_LOAD) {
1334 term.c = c;
1335 tmoveto(c.x, c.y);
1336 }
1337 }
1338
1339 void
1340 treset(void) {
1341 uint i;
1342
1343 term.c = (TCursor){{
1344 .mode = ATTR_NULL,
1345 .fg = defaultfg,
1346 .bg = defaultbg
1347 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1348
1349 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1350 for(i = tabspaces; i < term.col; i += tabspaces)
1351 term.tabs[i] = 1;
1352 term.top = 0;
1353 term.bot = term.row - 1;
1354 term.mode = MODE_WRAP;
1355
1356 tclearregion(0, 0, term.col-1, term.row-1);
1357 tmoveto(0, 0);
1358 tcursor(CURSOR_SAVE);
1359 }
1360
1361 void
1362 tnew(int col, int row) {
1363 memset(&term, 0, sizeof(Term));
1364 tresize(col, row);
1365 term.numlock = 1;
1366
1367 treset();
1368 }
1369
1370 void
1371 tswapscreen(void) {
1372 Line *tmp = term.line;
1373
1374 term.line = term.alt;
1375 term.alt = tmp;
1376 term.mode ^= MODE_ALTSCREEN;
1377 tfulldirt();
1378 }
1379
1380 void
1381 tscrolldown(int orig, int n) {
1382 int i;
1383 Line temp;
1384
1385 LIMIT(n, 0, term.bot-orig+1);
1386
1387 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1388
1389 for(i = term.bot; i >= orig+n; i--) {
1390 temp = term.line[i];
1391 term.line[i] = term.line[i-n];
1392 term.line[i-n] = temp;
1393
1394 term.dirty[i] = 1;
1395 term.dirty[i-n] = 1;
1396 }
1397
1398 selscroll(orig, n);
1399 }
1400
1401 void
1402 tscrollup(int orig, int n) {
1403 int i;
1404 Line temp;
1405 LIMIT(n, 0, term.bot-orig+1);
1406
1407 tclearregion(0, orig, term.col-1, orig+n-1);
1408
1409 for(i = orig; i <= term.bot-n; i++) {
1410 temp = term.line[i];
1411 term.line[i] = term.line[i+n];
1412 term.line[i+n] = temp;
1413
1414 term.dirty[i] = 1;
1415 term.dirty[i+n] = 1;
1416 }
1417
1418 selscroll(orig, -n);
1419 }
1420
1421 void
1422 selscroll(int orig, int n) {
1423 if(sel.ob.x == -1)
1424 return;
1425
1426 if(BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
1427 if((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
1428 sel.ob.x = -1;
1429 return;
1430 }
1431 if(sel.type == SEL_RECTANGULAR) {
1432 if(sel.ob.y < term.top)
1433 sel.ob.y = term.top;
1434 if(sel.oe.y > term.bot)
1435 sel.oe.y = term.bot;
1436 } else {
1437 if(sel.ob.y < term.top) {
1438 sel.ob.y = term.top;
1439 sel.ob.x = 0;
1440 }
1441 if(sel.oe.y > term.bot) {
1442 sel.oe.y = term.bot;
1443 sel.oe.x = term.col;
1444 }
1445 }
1446 selsort();
1447 }
1448 }
1449
1450 void
1451 tnewline(int first_col) {
1452 int y = term.c.y;
1453
1454 if(y == term.bot) {
1455 tscrollup(term.top, 1);
1456 } else {
1457 y++;
1458 }
1459 tmoveto(first_col ? 0 : term.c.x, y);
1460 }
1461
1462 void
1463 csiparse(void) {
1464 char *p = csiescseq.buf, *np;
1465 long int v;
1466
1467 csiescseq.narg = 0;
1468 if(*p == '?') {
1469 csiescseq.priv = 1;
1470 p++;
1471 }
1472
1473 csiescseq.buf[csiescseq.len] = '\0';
1474 while(p < csiescseq.buf+csiescseq.len) {
1475 np = NULL;
1476 v = strtol(p, &np, 10);
1477 if(np == p)
1478 v = 0;
1479 if(v == LONG_MAX || v == LONG_MIN)
1480 v = -1;
1481 csiescseq.arg[csiescseq.narg++] = v;
1482 p = np;
1483 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1484 break;
1485 p++;
1486 }
1487 csiescseq.mode = *p;
1488 }
1489
1490 /* for absolute user moves, when decom is set */
1491 void
1492 tmoveato(int x, int y) {
1493 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1494 }
1495
1496 void
1497 tmoveto(int x, int y) {
1498 int miny, maxy;
1499
1500 if(term.c.state & CURSOR_ORIGIN) {
1501 miny = term.top;
1502 maxy = term.bot;
1503 } else {
1504 miny = 0;
1505 maxy = term.row - 1;
1506 }
1507 LIMIT(x, 0, term.col-1);
1508 LIMIT(y, miny, maxy);
1509 term.c.state &= ~CURSOR_WRAPNEXT;
1510 term.c.x = x;
1511 term.c.y = y;
1512 }
1513
1514 void
1515 tsetchar(char *c, Glyph *attr, int x, int y) {
1516 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1517 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1518 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1519 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1520 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1521 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1522 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1523 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1524 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1525 };
1526
1527 /*
1528 * The table is proudly stolen from rxvt.
1529 */
1530 if(attr->mode & ATTR_GFX) {
1531 if(c[0] >= 0x41 && c[0] <= 0x7e
1532 && vt100_0[c[0] - 0x41]) {
1533 c = vt100_0[c[0] - 0x41];
1534 }
1535 }
1536
1537 term.dirty[y] = 1;
1538 term.line[y][x] = *attr;
1539 memcpy(term.line[y][x].c, c, UTF_SIZ);
1540 }
1541
1542 void
1543 tclearregion(int x1, int y1, int x2, int y2) {
1544 int x, y, temp;
1545
1546 if(x1 > x2)
1547 temp = x1, x1 = x2, x2 = temp;
1548 if(y1 > y2)
1549 temp = y1, y1 = y2, y2 = temp;
1550
1551 LIMIT(x1, 0, term.col-1);
1552 LIMIT(x2, 0, term.col-1);
1553 LIMIT(y1, 0, term.row-1);
1554 LIMIT(y2, 0, term.row-1);
1555
1556 for(y = y1; y <= y2; y++) {
1557 term.dirty[y] = 1;
1558 for(x = x1; x <= x2; x++) {
1559 if(selected(x, y))
1560 selclear(NULL);
1561 term.line[y][x] = term.c.attr;
1562 memcpy(term.line[y][x].c, " ", 2);
1563 }
1564 }
1565 }
1566
1567 void
1568 tdeletechar(int n) {
1569 int src = term.c.x + n;
1570 int dst = term.c.x;
1571 int size = term.col - src;
1572
1573 term.dirty[term.c.y] = 1;
1574
1575 if(src >= term.col) {
1576 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1577 return;
1578 }
1579
1580 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1581 size * sizeof(Glyph));
1582 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1583 }
1584
1585 void
1586 tinsertblank(int n) {
1587 int src = term.c.x;
1588 int dst = src + n;
1589 int size = term.col - dst;
1590
1591 term.dirty[term.c.y] = 1;
1592
1593 if(dst >= term.col) {
1594 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1595 return;
1596 }
1597
1598 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1599 size * sizeof(Glyph));
1600 tclearregion(src, term.c.y, dst - 1, term.c.y);
1601 }
1602
1603 void
1604 tinsertblankline(int n) {
1605 if(term.c.y < term.top || term.c.y > term.bot)
1606 return;
1607
1608 tscrolldown(term.c.y, n);
1609 }
1610
1611 void
1612 tdeleteline(int n) {
1613 if(term.c.y < term.top || term.c.y > term.bot)
1614 return;
1615
1616 tscrollup(term.c.y, n);
1617 }
1618
1619 void
1620 tsetattr(int *attr, int l) {
1621 int i;
1622
1623 for(i = 0; i < l; i++) {
1624 switch(attr[i]) {
1625 case 0:
1626 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE \
1627 | ATTR_BOLD | ATTR_ITALIC \
1628 | ATTR_BLINK);
1629 term.c.attr.fg = defaultfg;
1630 term.c.attr.bg = defaultbg;
1631 break;
1632 case 1:
1633 term.c.attr.mode |= ATTR_BOLD;
1634 break;
1635 case 3:
1636 term.c.attr.mode |= ATTR_ITALIC;
1637 break;
1638 case 4:
1639 term.c.attr.mode |= ATTR_UNDERLINE;
1640 break;
1641 case 5: /* slow blink */
1642 case 6: /* rapid blink */
1643 term.c.attr.mode |= ATTR_BLINK;
1644 break;
1645 case 7:
1646 term.c.attr.mode |= ATTR_REVERSE;
1647 break;
1648 case 21:
1649 case 22:
1650 term.c.attr.mode &= ~ATTR_BOLD;
1651 break;
1652 case 23:
1653 term.c.attr.mode &= ~ATTR_ITALIC;
1654 break;
1655 case 24:
1656 term.c.attr.mode &= ~ATTR_UNDERLINE;
1657 break;
1658 case 25:
1659 case 26:
1660 term.c.attr.mode &= ~ATTR_BLINK;
1661 break;
1662 case 27:
1663 term.c.attr.mode &= ~ATTR_REVERSE;
1664 break;
1665 case 38:
1666 if(i + 2 < l && attr[i + 1] == 5) {
1667 i += 2;
1668 if(BETWEEN(attr[i], 0, 255)) {
1669 term.c.attr.fg = attr[i];
1670 } else {
1671 fprintf(stderr,
1672 "erresc: bad fgcolor %d\n",
1673 attr[i]);
1674 }
1675 } else {
1676 fprintf(stderr,
1677 "erresc(38): gfx attr %d unknown\n",
1678 attr[i]);
1679 }
1680 break;
1681 case 39:
1682 term.c.attr.fg = defaultfg;
1683 break;
1684 case 48:
1685 if(i + 2 < l && attr[i + 1] == 5) {
1686 i += 2;
1687 if(BETWEEN(attr[i], 0, 255)) {
1688 term.c.attr.bg = attr[i];
1689 } else {
1690 fprintf(stderr,
1691 "erresc: bad bgcolor %d\n",
1692 attr[i]);
1693 }
1694 } else {
1695 fprintf(stderr,
1696 "erresc(48): gfx attr %d unknown\n",
1697 attr[i]);
1698 }
1699 break;
1700 case 49:
1701 term.c.attr.bg = defaultbg;
1702 break;
1703 default:
1704 if(BETWEEN(attr[i], 30, 37)) {
1705 term.c.attr.fg = attr[i] - 30;
1706 } else if(BETWEEN(attr[i], 40, 47)) {
1707 term.c.attr.bg = attr[i] - 40;
1708 } else if(BETWEEN(attr[i], 90, 97)) {
1709 term.c.attr.fg = attr[i] - 90 + 8;
1710 } else if(BETWEEN(attr[i], 100, 107)) {
1711 term.c.attr.bg = attr[i] - 100 + 8;
1712 } else {
1713 fprintf(stderr,
1714 "erresc(default): gfx attr %d unknown\n",
1715 attr[i]), csidump();
1716 }
1717 break;
1718 }
1719 }
1720 }
1721
1722 void
1723 tsetscroll(int t, int b) {
1724 int temp;
1725
1726 LIMIT(t, 0, term.row-1);
1727 LIMIT(b, 0, term.row-1);
1728 if(t > b) {
1729 temp = t;
1730 t = b;
1731 b = temp;
1732 }
1733 term.top = t;
1734 term.bot = b;
1735 }
1736
1737 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1738
1739 void
1740 tsetmode(bool priv, bool set, int *args, int narg) {
1741 int *lim, mode;
1742 bool alt;
1743
1744 for(lim = args + narg; args < lim; ++args) {
1745 if(priv) {
1746 switch(*args) {
1747 break;
1748 case 1: /* DECCKM -- Cursor key */
1749 MODBIT(term.mode, set, MODE_APPCURSOR);
1750 break;
1751 case 5: /* DECSCNM -- Reverse video */
1752 mode = term.mode;
1753 MODBIT(term.mode, set, MODE_REVERSE);
1754 if(mode != term.mode)
1755 redraw(REDRAW_TIMEOUT);
1756 break;
1757 case 6: /* DECOM -- Origin */
1758 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1759 tmoveato(0, 0);
1760 break;
1761 case 7: /* DECAWM -- Auto wrap */
1762 MODBIT(term.mode, set, MODE_WRAP);
1763 break;
1764 case 0: /* Error (IGNORED) */
1765 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1766 case 3: /* DECCOLM -- Column (IGNORED) */
1767 case 4: /* DECSCLM -- Scroll (IGNORED) */
1768 case 8: /* DECARM -- Auto repeat (IGNORED) */
1769 case 18: /* DECPFF -- Printer feed (IGNORED) */
1770 case 19: /* DECPEX -- Printer extent (IGNORED) */
1771 case 42: /* DECNRCM -- National characters (IGNORED) */
1772 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1773 break;
1774 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1775 MODBIT(term.mode, !set, MODE_HIDE);
1776 break;
1777 case 1000: /* 1000,1002: enable xterm mouse report */
1778 MODBIT(term.mode, set, MODE_MOUSEBTN);
1779 MODBIT(term.mode, 0, MODE_MOUSEMOTION);
1780 break;
1781 case 1002:
1782 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1783 MODBIT(term.mode, 0, MODE_MOUSEBTN);
1784 break;
1785 case 1006:
1786 MODBIT(term.mode, set, MODE_MOUSESGR);
1787 break;
1788 case 1034:
1789 MODBIT(term.mode, set, MODE_8BIT);
1790 break;
1791 case 1049: /* = 1047 and 1048 */
1792 case 47:
1793 case 1047:
1794 if (!allowaltscreen)
1795 break;
1796
1797 alt = IS_SET(MODE_ALTSCREEN);
1798 if(alt) {
1799 tclearregion(0, 0, term.col-1,
1800 term.row-1);
1801 }
1802 if(set ^ alt) /* set is always 1 or 0 */
1803 tswapscreen();
1804 if(*args != 1049)
1805 break;
1806 /* FALLTRU */
1807 case 1048:
1808 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1809 break;
1810 default:
1811 fprintf(stderr,
1812 "erresc: unknown private set/reset mode %d\n",
1813 *args);
1814 break;
1815 }
1816 } else {
1817 switch(*args) {
1818 case 0: /* Error (IGNORED) */
1819 break;
1820 case 2: /* KAM -- keyboard action */
1821 MODBIT(term.mode, set, MODE_KBDLOCK);
1822 break;
1823 case 4: /* IRM -- Insertion-replacement */
1824 MODBIT(term.mode, set, MODE_INSERT);
1825 break;
1826 case 12: /* SRM -- Send/Receive */
1827 MODBIT(term.mode, !set, MODE_ECHO);
1828 break;
1829 case 20: /* LNM -- Linefeed/new line */
1830 MODBIT(term.mode, set, MODE_CRLF);
1831 break;
1832 default:
1833 fprintf(stderr,
1834 "erresc: unknown set/reset mode %d\n",
1835 *args);
1836 break;
1837 }
1838 }
1839 }
1840 }
1841 #undef MODBIT
1842
1843
1844 void
1845 csihandle(void) {
1846 switch(csiescseq.mode) {
1847 default:
1848 unknown:
1849 fprintf(stderr, "erresc: unknown csi ");
1850 csidump();
1851 /* die(""); */
1852 break;
1853 case '@': /* ICH -- Insert <n> blank char */
1854 DEFAULT(csiescseq.arg[0], 1);
1855 tinsertblank(csiescseq.arg[0]);
1856 break;
1857 case 'A': /* CUU -- Cursor <n> Up */
1858 DEFAULT(csiescseq.arg[0], 1);
1859 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1860 break;
1861 case 'B': /* CUD -- Cursor <n> Down */
1862 case 'e': /* VPR --Cursor <n> Down */
1863 DEFAULT(csiescseq.arg[0], 1);
1864 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1865 break;
1866 case 'c': /* DA -- Device Attributes */
1867 if(csiescseq.arg[0] == 0)
1868 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1869 break;
1870 case 'C': /* CUF -- Cursor <n> Forward */
1871 case 'a': /* HPR -- Cursor <n> Forward */
1872 DEFAULT(csiescseq.arg[0], 1);
1873 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1874 break;
1875 case 'D': /* CUB -- Cursor <n> Backward */
1876 DEFAULT(csiescseq.arg[0], 1);
1877 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1878 break;
1879 case 'E': /* CNL -- Cursor <n> Down and first col */
1880 DEFAULT(csiescseq.arg[0], 1);
1881 tmoveto(0, term.c.y+csiescseq.arg[0]);
1882 break;
1883 case 'F': /* CPL -- Cursor <n> Up and first col */
1884 DEFAULT(csiescseq.arg[0], 1);
1885 tmoveto(0, term.c.y-csiescseq.arg[0]);
1886 break;
1887 case 'g': /* TBC -- Tabulation clear */
1888 switch(csiescseq.arg[0]) {
1889 case 0: /* clear current tab stop */
1890 term.tabs[term.c.x] = 0;
1891 break;
1892 case 3: /* clear all the tabs */
1893 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1894 break;
1895 default:
1896 goto unknown;
1897 }
1898 break;
1899 case 'G': /* CHA -- Move to <col> */
1900 case '`': /* HPA */
1901 DEFAULT(csiescseq.arg[0], 1);
1902 tmoveto(csiescseq.arg[0]-1, term.c.y);
1903 break;
1904 case 'H': /* CUP -- Move to <row> <col> */
1905 case 'f': /* HVP */
1906 DEFAULT(csiescseq.arg[0], 1);
1907 DEFAULT(csiescseq.arg[1], 1);
1908 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1909 break;
1910 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1911 DEFAULT(csiescseq.arg[0], 1);
1912 while(csiescseq.arg[0]--)
1913 tputtab(1);
1914 break;
1915 case 'J': /* ED -- Clear screen */
1916 sel.ob.x = -1;
1917 switch(csiescseq.arg[0]) {
1918 case 0: /* below */
1919 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1920 if(term.c.y < term.row-1) {
1921 tclearregion(0, term.c.y+1, term.col-1,
1922 term.row-1);
1923 }
1924 break;
1925 case 1: /* above */
1926 if(term.c.y > 1)
1927 tclearregion(0, 0, term.col-1, term.c.y-1);
1928 tclearregion(0, term.c.y, term.c.x, term.c.y);
1929 break;
1930 case 2: /* all */
1931 tclearregion(0, 0, term.col-1, term.row-1);
1932 break;
1933 default:
1934 goto unknown;
1935 }
1936 break;
1937 case 'K': /* EL -- Clear line */
1938 switch(csiescseq.arg[0]) {
1939 case 0: /* right */
1940 tclearregion(term.c.x, term.c.y, term.col-1,
1941 term.c.y);
1942 break;
1943 case 1: /* left */
1944 tclearregion(0, term.c.y, term.c.x, term.c.y);
1945 break;
1946 case 2: /* all */
1947 tclearregion(0, term.c.y, term.col-1, term.c.y);
1948 break;
1949 }
1950 break;
1951 case 'S': /* SU -- Scroll <n> line up */
1952 DEFAULT(csiescseq.arg[0], 1);
1953 tscrollup(term.top, csiescseq.arg[0]);
1954 break;
1955 case 'T': /* SD -- Scroll <n> line down */
1956 DEFAULT(csiescseq.arg[0], 1);
1957 tscrolldown(term.top, csiescseq.arg[0]);
1958 break;
1959 case 'L': /* IL -- Insert <n> blank lines */
1960 DEFAULT(csiescseq.arg[0], 1);
1961 tinsertblankline(csiescseq.arg[0]);
1962 break;
1963 case 'l': /* RM -- Reset Mode */
1964 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
1965 break;
1966 case 'M': /* DL -- Delete <n> lines */
1967 DEFAULT(csiescseq.arg[0], 1);
1968 tdeleteline(csiescseq.arg[0]);
1969 break;
1970 case 'X': /* ECH -- Erase <n> char */
1971 DEFAULT(csiescseq.arg[0], 1);
1972 tclearregion(term.c.x, term.c.y,
1973 term.c.x + csiescseq.arg[0] - 1, term.c.y);
1974 break;
1975 case 'P': /* DCH -- Delete <n> char */
1976 DEFAULT(csiescseq.arg[0], 1);
1977 tdeletechar(csiescseq.arg[0]);
1978 break;
1979 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
1980 DEFAULT(csiescseq.arg[0], 1);
1981 while(csiescseq.arg[0]--)
1982 tputtab(0);
1983 break;
1984 case 'd': /* VPA -- Move to <row> */
1985 DEFAULT(csiescseq.arg[0], 1);
1986 tmoveato(term.c.x, csiescseq.arg[0]-1);
1987 break;
1988 case 'h': /* SM -- Set terminal mode */
1989 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
1990 break;
1991 case 'm': /* SGR -- Terminal attribute (color) */
1992 tsetattr(csiescseq.arg, csiescseq.narg);
1993 break;
1994 case 'r': /* DECSTBM -- Set Scrolling Region */
1995 if(csiescseq.priv) {
1996 goto unknown;
1997 } else {
1998 DEFAULT(csiescseq.arg[0], 1);
1999 DEFAULT(csiescseq.arg[1], term.row);
2000 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
2001 tmoveato(0, 0);
2002 }
2003 break;
2004 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
2005 tcursor(CURSOR_SAVE);
2006 break;
2007 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
2008 tcursor(CURSOR_LOAD);
2009 break;
2010 }
2011 }
2012
2013 void
2014 csidump(void) {
2015 int i;
2016 uint c;
2017
2018 printf("ESC[");
2019 for(i = 0; i < csiescseq.len; i++) {
2020 c = csiescseq.buf[i] & 0xff;
2021 if(isprint(c)) {
2022 putchar(c);
2023 } else if(c == '\n') {
2024 printf("(\\n)");
2025 } else if(c == '\r') {
2026 printf("(\\r)");
2027 } else if(c == 0x1b) {
2028 printf("(\\e)");
2029 } else {
2030 printf("(%02x)", c);
2031 }
2032 }
2033 putchar('\n');
2034 }
2035
2036 void
2037 csireset(void) {
2038 memset(&csiescseq, 0, sizeof(csiescseq));
2039 }
2040
2041 void
2042 strhandle(void) {
2043 char *p = NULL;
2044 int i, j, narg;
2045
2046 strparse();
2047 narg = strescseq.narg;
2048
2049 switch(strescseq.type) {
2050 case ']': /* OSC -- Operating System Command */
2051 switch(i = atoi(strescseq.args[0])) {
2052 case 0:
2053 case 1:
2054 case 2:
2055 if(narg > 1)
2056 xsettitle(strescseq.args[1]);
2057 break;
2058 case 4: /* color set */
2059 if(narg < 3)
2060 break;
2061 p = strescseq.args[2];
2062 /* fall through */
2063 case 104: /* color reset, here p = NULL */
2064 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2065 if (!xsetcolorname(j, p)) {
2066 fprintf(stderr, "erresc: invalid color %s\n", p);
2067 } else {
2068 /*
2069 * TODO if defaultbg color is changed, borders
2070 * are dirty
2071 */
2072 redraw(0);
2073 }
2074 break;
2075 default:
2076 fprintf(stderr, "erresc: unknown str ");
2077 strdump();
2078 break;
2079 }
2080 break;
2081 case 'k': /* old title set compatibility */
2082 xsettitle(strescseq.args[0]);
2083 break;
2084 case 'P': /* DSC -- Device Control String */
2085 case '_': /* APC -- Application Program Command */
2086 case '^': /* PM -- Privacy Message */
2087 default:
2088 fprintf(stderr, "erresc: unknown str ");
2089 strdump();
2090 /* die(""); */
2091 break;
2092 }
2093 }
2094
2095 void
2096 strparse(void) {
2097 char *p = strescseq.buf;
2098
2099 strescseq.narg = 0;
2100 strescseq.buf[strescseq.len] = '\0';
2101 while(p && strescseq.narg < STR_ARG_SIZ)
2102 strescseq.args[strescseq.narg++] = strsep(&p, ";");
2103 }
2104
2105 void
2106 strdump(void) {
2107 int i;
2108 uint c;
2109
2110 printf("ESC%c", strescseq.type);
2111 for(i = 0; i < strescseq.len; i++) {
2112 c = strescseq.buf[i] & 0xff;
2113 if(c == '\0') {
2114 return;
2115 } else if(isprint(c)) {
2116 putchar(c);
2117 } else if(c == '\n') {
2118 printf("(\\n)");
2119 } else if(c == '\r') {
2120 printf("(\\r)");
2121 } else if(c == 0x1b) {
2122 printf("(\\e)");
2123 } else {
2124 printf("(%02x)", c);
2125 }
2126 }
2127 printf("ESC\\\n");
2128 }
2129
2130 void
2131 strreset(void) {
2132 memset(&strescseq, 0, sizeof(strescseq));
2133 }
2134
2135 void
2136 tputtab(bool forward) {
2137 uint x = term.c.x;
2138
2139 if(forward) {
2140 if(x == term.col)
2141 return;
2142 for(++x; x < term.col && !term.tabs[x]; ++x)
2143 /* nothing */ ;
2144 } else {
2145 if(x == 0)
2146 return;
2147 for(--x; x > 0 && !term.tabs[x]; --x)
2148 /* nothing */ ;
2149 }
2150 tmoveto(x, term.c.y);
2151 }
2152
2153 void
2154 techo(char *buf, int len) {
2155 for(; len > 0; buf++, len--) {
2156 char c = *buf;
2157
2158 if(c == '\033') { /* escape */
2159 tputc("^", 1);
2160 tputc("[", 1);
2161 } else if(c < '\x20') { /* control code */
2162 if(c != '\n' && c != '\r' && c != '\t') {
2163 c |= '\x40';
2164 tputc("^", 1);
2165 }
2166 tputc(&c, 1);
2167 } else {
2168 break;
2169 }
2170 }
2171 if(len)
2172 tputc(buf, len);
2173 }
2174
2175 void
2176 tputc(char *c, int len) {
2177 uchar ascii = *c;
2178 bool control = ascii < '\x20' || ascii == 0177;
2179
2180 if(iofd != -1) {
2181 if(xwrite(iofd, c, len) < 0) {
2182 fprintf(stderr, "Error writing in %s:%s\n",
2183 opt_io, strerror(errno));
2184 close(iofd);
2185 iofd = -1;
2186 }
2187 }
2188
2189 /*
2190 * STR sequences must be checked before anything else
2191 * because it can use some control codes as part of the sequence.
2192 */
2193 if(term.esc & ESC_STR) {
2194 switch(ascii) {
2195 case '\033':
2196 term.esc = ESC_START | ESC_STR_END;
2197 break;
2198 case '\a': /* backwards compatibility to xterm */
2199 term.esc = 0;
2200 strhandle();
2201 break;
2202 default:
2203 if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2204 memmove(&strescseq.buf[strescseq.len], c, len);
2205 strescseq.len += len;
2206 } else {
2207 /*
2208 * Here is a bug in terminals. If the user never sends
2209 * some code to stop the str or esc command, then st
2210 * will stop responding. But this is better than
2211 * silently failing with unknown characters. At least
2212 * then users will report back.
2213 *
2214 * In the case users ever get fixed, here is the code:
2215 */
2216 /*
2217 * term.esc = 0;
2218 * strhandle();
2219 */
2220 }
2221 }
2222 return;
2223 }
2224
2225 /*
2226 * Actions of control codes must be performed as soon they arrive
2227 * because they can be embedded inside a control sequence, and
2228 * they must not cause conflicts with sequences.
2229 */
2230 if(control) {
2231 switch(ascii) {
2232 case '\t': /* HT */
2233 tputtab(1);
2234 return;
2235 case '\b': /* BS */
2236 tmoveto(term.c.x-1, term.c.y);
2237 return;
2238 case '\r': /* CR */
2239 tmoveto(0, term.c.y);
2240 return;
2241 case '\f': /* LF */
2242 case '\v': /* VT */
2243 case '\n': /* LF */
2244 /* go to first col if the mode is set */
2245 tnewline(IS_SET(MODE_CRLF));
2246 return;
2247 case '\a': /* BEL */
2248 if(!(xw.state & WIN_FOCUSED))
2249 xseturgency(1);
2250 return;
2251 case '\033': /* ESC */
2252 csireset();
2253 term.esc = ESC_START;
2254 return;
2255 case '\016': /* SO */
2256 case '\017': /* SI */
2257 /*
2258 * Different charsets are hard to handle. Applications
2259 * should use the right alt charset escapes for the
2260 * only reason they still exist: line drawing. The
2261 * rest is incompatible history st should not support.
2262 */
2263 return;
2264 case '\032': /* SUB */
2265 case '\030': /* CAN */
2266 csireset();
2267 return;
2268 case '\005': /* ENQ (IGNORED) */
2269 case '\000': /* NUL (IGNORED) */
2270 case '\021': /* XON (IGNORED) */
2271 case '\023': /* XOFF (IGNORED) */
2272 case 0177: /* DEL (IGNORED) */
2273 return;
2274 }
2275 } else if(term.esc & ESC_START) {
2276 if(term.esc & ESC_CSI) {
2277 csiescseq.buf[csiescseq.len++] = ascii;
2278 if(BETWEEN(ascii, 0x40, 0x7E)
2279 || csiescseq.len >= \
2280 sizeof(csiescseq.buf)-1) {
2281 term.esc = 0;
2282 csiparse();
2283 csihandle();
2284 }
2285 } else if(term.esc & ESC_STR_END) {
2286 term.esc = 0;
2287 if(ascii == '\\')
2288 strhandle();
2289 } else if(term.esc & ESC_ALTCHARSET) {
2290 switch(ascii) {
2291 case '0': /* Line drawing set */
2292 term.c.attr.mode |= ATTR_GFX;
2293 break;
2294 case 'B': /* USASCII */
2295 term.c.attr.mode &= ~ATTR_GFX;
2296 break;
2297 case 'A': /* UK (IGNORED) */
2298 case '<': /* multinational charset (IGNORED) */
2299 case '5': /* Finnish (IGNORED) */
2300 case 'C': /* Finnish (IGNORED) */
2301 case 'K': /* German (IGNORED) */
2302 break;
2303 default:
2304 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2305 }
2306 term.esc = 0;
2307 } else if(term.esc & ESC_TEST) {
2308 if(ascii == '8') { /* DEC screen alignment test. */
2309 char E[UTF_SIZ] = "E";
2310 int x, y;
2311
2312 for(x = 0; x < term.col; ++x) {
2313 for(y = 0; y < term.row; ++y)
2314 tsetchar(E, &term.c.attr, x, y);
2315 }
2316 }
2317 term.esc = 0;
2318 } else {
2319 switch(ascii) {
2320 case '[':
2321 term.esc |= ESC_CSI;
2322 break;
2323 case '#':
2324 term.esc |= ESC_TEST;
2325 break;
2326 case 'P': /* DCS -- Device Control String */
2327 case '_': /* APC -- Application Program Command */
2328 case '^': /* PM -- Privacy Message */
2329 case ']': /* OSC -- Operating System Command */
2330 case 'k': /* old title set compatibility */
2331 strreset();
2332 strescseq.type = ascii;
2333 term.esc |= ESC_STR;
2334 break;
2335 case '(': /* set primary charset G0 */
2336 term.esc |= ESC_ALTCHARSET;
2337 break;
2338 case ')': /* set secondary charset G1 (IGNORED) */
2339 case '*': /* set tertiary charset G2 (IGNORED) */
2340 case '+': /* set quaternary charset G3 (IGNORED) */
2341 term.esc = 0;
2342 break;
2343 case 'D': /* IND -- Linefeed */
2344 if(term.c.y == term.bot) {
2345 tscrollup(term.top, 1);
2346 } else {
2347 tmoveto(term.c.x, term.c.y+1);
2348 }
2349 term.esc = 0;
2350 break;
2351 case 'E': /* NEL -- Next line */
2352 tnewline(1); /* always go to first col */
2353 term.esc = 0;
2354 break;
2355 case 'H': /* HTS -- Horizontal tab stop */
2356 term.tabs[term.c.x] = 1;
2357 term.esc = 0;
2358 break;
2359 case 'M': /* RI -- Reverse index */
2360 if(term.c.y == term.top) {
2361 tscrolldown(term.top, 1);
2362 } else {
2363 tmoveto(term.c.x, term.c.y-1);
2364 }
2365 term.esc = 0;
2366 break;
2367 case 'Z': /* DECID -- Identify Terminal */
2368 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2369 term.esc = 0;
2370 break;
2371 case 'c': /* RIS -- Reset to inital state */
2372 treset();
2373 term.esc = 0;
2374 xresettitle();
2375 break;
2376 case '=': /* DECPAM -- Application keypad */
2377 term.mode |= MODE_APPKEYPAD;
2378 term.esc = 0;
2379 break;
2380 case '>': /* DECPNM -- Normal keypad */
2381 term.mode &= ~MODE_APPKEYPAD;
2382 term.esc = 0;
2383 break;
2384 case '7': /* DECSC -- Save Cursor */
2385 tcursor(CURSOR_SAVE);
2386 term.esc = 0;
2387 break;
2388 case '8': /* DECRC -- Restore Cursor */
2389 tcursor(CURSOR_LOAD);
2390 term.esc = 0;
2391 break;
2392 case '\\': /* ST -- Stop */
2393 term.esc = 0;
2394 break;
2395 default:
2396 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2397 (uchar) ascii, isprint(ascii)? ascii:'.');
2398 term.esc = 0;
2399 }
2400 }
2401 /*
2402 * All characters which form part of a sequence are not
2403 * printed
2404 */
2405 return;
2406 }
2407 /*
2408 * Display control codes only if we are in graphic mode
2409 */
2410 if(control && !(term.c.attr.mode & ATTR_GFX))
2411 return;
2412 if(sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
2413 sel.ob.x = -1;
2414 if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2415 term.line[term.c.y][term.c.x].mode |= ATTR_WRAP;
2416 tnewline(1);
2417 }
2418
2419 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col) {
2420 memmove(&term.line[term.c.y][term.c.x+1],
2421 &term.line[term.c.y][term.c.x],
2422 (term.col - term.c.x - 1) * sizeof(Glyph));
2423 }
2424
2425 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2426 if(term.c.x+1 < term.col) {
2427 tmoveto(term.c.x+1, term.c.y);
2428 } else {
2429 term.c.state |= CURSOR_WRAPNEXT;
2430 }
2431 }
2432
2433 int
2434 tresize(int col, int row) {
2435 int i;
2436 int minrow = MIN(row, term.row);
2437 int mincol = MIN(col, term.col);
2438 int slide = term.c.y - row + 1;
2439 bool *bp;
2440 Line *orig;
2441
2442 if(col < 1 || row < 1)
2443 return 0;
2444
2445 /* free unneeded rows */
2446 i = 0;
2447 if(slide > 0) {
2448 /*
2449 * slide screen to keep cursor where we expect it -
2450 * tscrollup would work here, but we can optimize to
2451 * memmove because we're freeing the earlier lines
2452 */
2453 for(/* i = 0 */; i < slide; i++) {
2454 free(term.line[i]);
2455 free(term.alt[i]);
2456 }
2457 memmove(term.line, term.line + slide, row * sizeof(Line));
2458 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2459 }
2460 for(i += row; i < term.row; i++) {
2461 free(term.line[i]);
2462 free(term.alt[i]);
2463 }
2464
2465 /* resize to new height */
2466 term.line = xrealloc(term.line, row * sizeof(Line));
2467 term.alt = xrealloc(term.alt, row * sizeof(Line));
2468 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2469 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2470
2471 /* resize each row to new width, zero-pad if needed */
2472 for(i = 0; i < minrow; i++) {
2473 term.dirty[i] = 1;
2474 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2475 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2476 }
2477
2478 /* allocate any new rows */
2479 for(/* i == minrow */; i < row; i++) {
2480 term.dirty[i] = 1;
2481 term.line[i] = xcalloc(col, sizeof(Glyph));
2482 term.alt [i] = xcalloc(col, sizeof(Glyph));
2483 }
2484 if(col > term.col) {
2485 bp = term.tabs + term.col;
2486
2487 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2488 while(--bp > term.tabs && !*bp)
2489 /* nothing */ ;
2490 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2491 *bp = 1;
2492 }
2493 /* update terminal size */
2494 term.col = col;
2495 term.row = row;
2496 /* reset scrolling region */
2497 tsetscroll(0, row-1);
2498 /* make use of the LIMIT in tmoveto */
2499 tmoveto(term.c.x, term.c.y);
2500 /* Clearing both screens */
2501 orig = term.line;
2502 do {
2503 if(mincol < col && 0 < minrow) {
2504 tclearregion(mincol, 0, col - 1, minrow - 1);
2505 }
2506 if(0 < col && minrow < row) {
2507 tclearregion(0, minrow, col - 1, row - 1);
2508 }
2509 tswapscreen();
2510 } while(orig != term.line);
2511
2512 return (slide > 0);
2513 }
2514
2515 void
2516 xresize(int col, int row) {
2517 xw.tw = MAX(1, col * xw.cw);
2518 xw.th = MAX(1, row * xw.ch);
2519
2520 XFreePixmap(xw.dpy, xw.buf);
2521 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2522 DefaultDepth(xw.dpy, xw.scr));
2523 XftDrawChange(xw.draw, xw.buf);
2524 xclear(0, 0, xw.w, xw.h);
2525 }
2526
2527 static inline ushort
2528 sixd_to_16bit(int x) {
2529 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2530 }
2531
2532 void
2533 xloadcols(void) {
2534 int i, r, g, b;
2535 XRenderColor color = { .alpha = 0xffff };
2536
2537 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
2538 for(i = 0; i < LEN(colorname); i++) {
2539 if(!colorname[i])
2540 continue;
2541 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2542 die("Could not allocate color '%s'\n", colorname[i]);
2543 }
2544 }
2545
2546 /* load colors [16-255] ; same colors as xterm */
2547 for(i = 16, r = 0; r < 6; r++) {
2548 for(g = 0; g < 6; g++) {
2549 for(b = 0; b < 6; b++) {
2550 color.red = sixd_to_16bit(r);
2551 color.green = sixd_to_16bit(g);
2552 color.blue = sixd_to_16bit(b);
2553 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i])) {
2554 die("Could not allocate color %d\n", i);
2555 }
2556 i++;
2557 }
2558 }
2559 }
2560
2561 for(r = 0; r < 24; r++, i++) {
2562 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
2563 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color,
2564 &dc.col[i])) {
2565 die("Could not allocate color %d\n", i);
2566 }
2567 }
2568 }
2569
2570 int
2571 xsetcolorname(int x, const char *name) {
2572 XRenderColor color = { .alpha = 0xffff };
2573 Colour colour;
2574 if (x < 0 || x > LEN(colorname))
2575 return -1;
2576 if(!name) {
2577 if(16 <= x && x < 16 + 216) {
2578 int r = (x - 16) / 36, g = ((x - 16) % 36) / 6, b = (x - 16) % 6;
2579 color.red = sixd_to_16bit(r);
2580 color.green = sixd_to_16bit(g);
2581 color.blue = sixd_to_16bit(b);
2582 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2583 return 0; /* something went wrong */
2584 dc.col[x] = colour;
2585 return 1;
2586 } else if (16 + 216 <= x && x < 256) {
2587 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (x - (16 + 216));
2588 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2589 return 0; /* something went wrong */
2590 dc.col[x] = colour;
2591 return 1;
2592 } else {
2593 name = colorname[x];
2594 }
2595 }
2596 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &colour))
2597 return 0;
2598 dc.col[x] = colour;
2599 return 1;
2600 }
2601
2602 void
2603 xtermclear(int col1, int row1, int col2, int row2) {
2604 XftDrawRect(xw.draw,
2605 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2606 borderpx + col1 * xw.cw,
2607 borderpx + row1 * xw.ch,
2608 (col2-col1+1) * xw.cw,
2609 (row2-row1+1) * xw.ch);
2610 }
2611
2612 /*
2613 * Absolute coordinates.
2614 */
2615 void
2616 xclear(int x1, int y1, int x2, int y2) {
2617 XftDrawRect(xw.draw,
2618 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2619 x1, y1, x2-x1, y2-y1);
2620 }
2621
2622 void
2623 xhints(void) {
2624 XClassHint class = {opt_class ? opt_class : termname, termname};
2625 XWMHints wm = {.flags = InputHint, .input = 1};
2626 XSizeHints *sizeh = NULL;
2627
2628 sizeh = XAllocSizeHints();
2629 if(xw.isfixed == False) {
2630 sizeh->flags = PSize | PResizeInc | PBaseSize;
2631 sizeh->height = xw.h;
2632 sizeh->width = xw.w;
2633 sizeh->height_inc = xw.ch;
2634 sizeh->width_inc = xw.cw;
2635 sizeh->base_height = 2 * borderpx;
2636 sizeh->base_width = 2 * borderpx;
2637 } else {
2638 sizeh->flags = PMaxSize | PMinSize;
2639 sizeh->min_width = sizeh->max_width = xw.fw;
2640 sizeh->min_height = sizeh->max_height = xw.fh;
2641 }
2642
2643 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
2644 XFree(sizeh);
2645 }
2646
2647 int
2648 xloadfont(Font *f, FcPattern *pattern) {
2649 FcPattern *match;
2650 FcResult result;
2651
2652 match = FcFontMatch(NULL, pattern, &result);
2653 if(!match)
2654 return 1;
2655
2656 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2657 FcPatternDestroy(match);
2658 return 1;
2659 }
2660
2661 f->set = NULL;
2662 f->pattern = FcPatternDuplicate(pattern);
2663
2664 f->ascent = f->match->ascent;
2665 f->descent = f->match->descent;
2666 f->lbearing = 0;
2667 f->rbearing = f->match->max_advance_width;
2668
2669 f->height = f->ascent + f->descent;
2670 f->width = f->lbearing + f->rbearing;
2671
2672 return 0;
2673 }
2674
2675 void
2676 xloadfonts(char *fontstr, int fontsize) {
2677 FcPattern *pattern;
2678 FcResult result;
2679 double fontval;
2680
2681 if(fontstr[0] == '-') {
2682 pattern = XftXlfdParse(fontstr, False, False);
2683 } else {
2684 pattern = FcNameParse((FcChar8 *)fontstr);
2685 }
2686
2687 if(!pattern)
2688 die("st: can't open font %s\n", fontstr);
2689
2690 if(fontsize > 0) {
2691 FcPatternDel(pattern, FC_PIXEL_SIZE);
2692 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2693 usedfontsize = fontsize;
2694 } else {
2695 result = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2696 if(result == FcResultMatch) {
2697 usedfontsize = (int)fontval;
2698 } else {
2699 /*
2700 * Default font size is 12, if none given. This is to
2701 * have a known usedfontsize value.
2702 */
2703 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
2704 usedfontsize = 12;
2705 }
2706 }
2707
2708 FcConfigSubstitute(0, pattern, FcMatchPattern);
2709 FcDefaultSubstitute(pattern);
2710
2711 if(xloadfont(&dc.font, pattern))
2712 die("st: can't open font %s\n", fontstr);
2713
2714 /* Setting character width and height. */
2715 xw.cw = dc.font.width;
2716 xw.ch = dc.font.height;
2717
2718 FcPatternDel(pattern, FC_SLANT);
2719 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
2720 if(xloadfont(&dc.ifont, pattern))
2721 die("st: can't open font %s\n", fontstr);
2722
2723 FcPatternDel(pattern, FC_WEIGHT);
2724 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
2725 if(xloadfont(&dc.ibfont, pattern))
2726 die("st: can't open font %s\n", fontstr);
2727
2728 FcPatternDel(pattern, FC_SLANT);
2729 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
2730 if(xloadfont(&dc.bfont, pattern))
2731 die("st: can't open font %s\n", fontstr);
2732
2733 FcPatternDestroy(pattern);
2734 }
2735
2736 int
2737 xloadfontset(Font *f) {
2738 FcResult result;
2739
2740 if(!(f->set = FcFontSort(0, f->pattern, FcTrue, 0, &result)))
2741 return 1;
2742 return 0;
2743 }
2744
2745 void
2746 xunloadfont(Font *f) {
2747 XftFontClose(xw.dpy, f->match);
2748 FcPatternDestroy(f->pattern);
2749 if(f->set)
2750 FcFontSetDestroy(f->set);
2751 }
2752
2753 void
2754 xunloadfonts(void) {
2755 int i, ip;
2756
2757 /*
2758 * Free the loaded fonts in the font cache. This is done backwards
2759 * from the frccur.
2760 */
2761 for(i = 0, ip = frccur; i < frclen; i++, ip--) {
2762 if(ip < 0)
2763 ip = LEN(frc) - 1;
2764 XftFontClose(xw.dpy, frc[ip].font);
2765 }
2766 frccur = -1;
2767 frclen = 0;
2768
2769 xunloadfont(&dc.font);
2770 xunloadfont(&dc.bfont);
2771 xunloadfont(&dc.ifont);
2772 xunloadfont(&dc.ibfont);
2773 }
2774
2775 void
2776 xzoom(const Arg *arg) {
2777 xunloadfonts();
2778 xloadfonts(usedfont, usedfontsize + arg->i);
2779 cresize(0, 0);
2780 redraw(0);
2781 }
2782
2783 void
2784 xinit(void) {
2785 XSetWindowAttributes attrs;
2786 XGCValues gcvalues;
2787 Cursor cursor;
2788 Window parent;
2789 int sw, sh;
2790
2791 if(!(xw.dpy = XOpenDisplay(NULL)))
2792 die("Can't open display\n");
2793 xw.scr = XDefaultScreen(xw.dpy);
2794 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
2795
2796 /* font */
2797 if(!FcInit())
2798 die("Could not init fontconfig.\n");
2799
2800 usedfont = (opt_font == NULL)? font : opt_font;
2801 xloadfonts(usedfont, 0);
2802
2803 /* colors */
2804 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
2805 xloadcols();
2806
2807 /* adjust fixed window geometry */
2808 if(xw.isfixed) {
2809 sw = DisplayWidth(xw.dpy, xw.scr);
2810 sh = DisplayHeight(xw.dpy, xw.scr);
2811 if(xw.fx < 0)
2812 xw.fx = sw + xw.fx - xw.fw - 1;
2813 if(xw.fy < 0)
2814 xw.fy = sh + xw.fy - xw.fh - 1;
2815
2816 xw.h = xw.fh;
2817 xw.w = xw.fw;
2818 } else {
2819 /* window - default size */
2820 xw.h = 2 * borderpx + term.row * xw.ch;
2821 xw.w = 2 * borderpx + term.col * xw.cw;
2822 xw.fx = 0;
2823 xw.fy = 0;
2824 }
2825
2826 /* Events */
2827 attrs.background_pixel = dc.col[defaultbg].pixel;
2828 attrs.border_pixel = dc.col[defaultbg].pixel;
2829 attrs.bit_gravity = NorthWestGravity;
2830 attrs.event_mask = FocusChangeMask | KeyPressMask
2831 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
2832 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
2833 attrs.colormap = xw.cmap;
2834
2835 parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
2836 XRootWindow(xw.dpy, xw.scr);
2837 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
2838 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
2839 xw.vis,
2840 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
2841 | CWColormap,
2842 &attrs);
2843
2844 memset(&gcvalues, 0, sizeof(gcvalues));
2845 gcvalues.graphics_exposures = False;
2846 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
2847 &gcvalues);
2848 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2849 DefaultDepth(xw.dpy, xw.scr));
2850 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
2851 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
2852
2853 /* Xft rendering context */
2854 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
2855
2856 /* input methods */
2857 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2858 XSetLocaleModifiers("@im=local");
2859 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2860 XSetLocaleModifiers("@im=");
2861 if((xw.xim = XOpenIM(xw.dpy,
2862 NULL, NULL, NULL)) == NULL) {
2863 die("XOpenIM failed. Could not open input"
2864 " device.\n");
2865 }
2866 }
2867 }
2868 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
2869 | XIMStatusNothing, XNClientWindow, xw.win,
2870 XNFocusWindow, xw.win, NULL);
2871 if(xw.xic == NULL)
2872 die("XCreateIC failed. Could not obtain input method.\n");
2873
2874 /* white cursor, black outline */
2875 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
2876 XDefineCursor(xw.dpy, xw.win, cursor);
2877 XRecolorCursor(xw.dpy, cursor,
2878 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
2879 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
2880
2881 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
2882 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
2883 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
2884
2885 xresettitle();
2886 XMapWindow(xw.dpy, xw.win);
2887 xhints();
2888 XSync(xw.dpy, 0);
2889 }
2890
2891 void
2892 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
2893 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
2894 width = charlen * xw.cw, xp, i;
2895 int frp, frcflags;
2896 int u8fl, u8fblen, u8cblen, doesexist;
2897 char *u8c, *u8fs;
2898 long u8char;
2899 Font *font = &dc.font;
2900 FcResult fcres;
2901 FcPattern *fcpattern, *fontpattern;
2902 FcFontSet *fcsets[] = { NULL };
2903 FcCharSet *fccharset;
2904 Colour *fg, *bg, *temp, revfg, revbg;
2905 XRenderColor colfg, colbg;
2906 Rectangle r;
2907
2908 frcflags = FRC_NORMAL;
2909
2910 if(base.mode & ATTR_ITALIC) {
2911 if(base.fg == defaultfg)
2912 base.fg = defaultitalic;
2913 font = &dc.ifont;
2914 frcflags = FRC_ITALIC;
2915 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
2916 if(base.fg == defaultfg)
2917 base.fg = defaultitalic;
2918 font = &dc.ibfont;
2919 frcflags = FRC_ITALICBOLD;
2920 } else if(base.mode & ATTR_UNDERLINE) {
2921 if(base.fg == defaultfg)
2922 base.fg = defaultunderline;
2923 }
2924 fg = &dc.col[base.fg];
2925 bg = &dc.col[base.bg];
2926
2927 if(base.mode & ATTR_BOLD) {
2928 if(BETWEEN(base.fg, 0, 7)) {
2929 /* basic system colors */
2930 fg = &dc.col[base.fg + 8];
2931 } else if(BETWEEN(base.fg, 16, 195)) {
2932 /* 256 colors */
2933 fg = &dc.col[base.fg + 36];
2934 } else if(BETWEEN(base.fg, 232, 251)) {
2935 /* greyscale */
2936 fg = &dc.col[base.fg + 4];
2937 }
2938 /*
2939 * Those ranges will not be brightened:
2940 * 8 - 15 – bright system colors
2941 * 196 - 231 – highest 256 color cube
2942 * 252 - 255 – brightest colors in greyscale
2943 */
2944 font = &dc.bfont;
2945 frcflags = FRC_BOLD;
2946 }
2947
2948 if(IS_SET(MODE_REVERSE)) {
2949 if(fg == &dc.col[defaultfg]) {
2950 fg = &dc.col[defaultbg];
2951 } else {
2952 colfg.red = ~fg->color.red;
2953 colfg.green = ~fg->color.green;
2954 colfg.blue = ~fg->color.blue;
2955 colfg.alpha = fg->color.alpha;
2956 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
2957 fg = &revfg;
2958 }
2959
2960 if(bg == &dc.col[defaultbg]) {
2961 bg = &dc.col[defaultfg];
2962 } else {
2963 colbg.red = ~bg->color.red;
2964 colbg.green = ~bg->color.green;
2965 colbg.blue = ~bg->color.blue;
2966 colbg.alpha = bg->color.alpha;
2967 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &revbg);
2968 bg = &revbg;
2969 }
2970 }
2971
2972 if(base.mode & ATTR_REVERSE) {
2973 temp = fg;
2974 fg = bg;
2975 bg = temp;
2976 }
2977
2978 if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
2979 fg = bg;
2980
2981 /* Intelligent cleaning up of the borders. */
2982 if(x == 0) {
2983 xclear(0, (y == 0)? 0 : winy, borderpx,
2984 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
2985 }
2986 if(x + charlen >= term.col) {
2987 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
2988 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
2989 }
2990 if(y == 0)
2991 xclear(winx, 0, winx + width, borderpx);
2992 if(y == term.row-1)
2993 xclear(winx, winy + xw.ch, winx + width, xw.h);
2994
2995 /* Clean up the region we want to draw to. */
2996 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
2997
2998 /* Set the clip region because Xft is sometimes dirty. */
2999 r.x = 0;
3000 r.y = 0;
3001 r.height = xw.ch;
3002 r.width = width;
3003 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
3004
3005 for(xp = winx; bytelen > 0;) {
3006 /*
3007 * Search for the range in the to be printed string of glyphs
3008 * that are in the main font. Then print that range. If
3009 * some glyph is found that is not in the font, do the
3010 * fallback dance.
3011 */
3012 u8fs = s;
3013 u8fblen = 0;
3014 u8fl = 0;
3015 for(;;) {
3016 u8c = s;
3017 u8cblen = utf8decode(s, &u8char);
3018 s += u8cblen;
3019 bytelen -= u8cblen;
3020
3021 doesexist = XftCharIndex(xw.dpy, font->match, u8char);
3022 if(!doesexist || bytelen <= 0) {
3023 if(bytelen <= 0) {
3024 if(doesexist) {
3025 u8fl++;
3026 u8fblen += u8cblen;
3027 }
3028 }
3029
3030 if(u8fl > 0) {
3031 XftDrawStringUtf8(xw.draw, fg,
3032 font->match, xp,
3033 winy + font->ascent,
3034 (FcChar8 *)u8fs,
3035 u8fblen);
3036 xp += font->width * u8fl;
3037
3038 }
3039 break;
3040 }
3041
3042 u8fl++;
3043 u8fblen += u8cblen;
3044 }
3045 if(doesexist)
3046 break;
3047
3048 frp = frccur;
3049 /* Search the font cache. */
3050 for(i = 0; i < frclen; i++, frp--) {
3051 if(frp <= 0)
3052 frp = LEN(frc) - 1;
3053
3054 if(frc[frp].c == u8char
3055 && frc[frp].flags == frcflags) {
3056 break;
3057 }
3058 }
3059
3060 /* Nothing was found. */
3061 if(i >= frclen) {
3062 if(!font->set)
3063 xloadfontset(font);
3064 fcsets[0] = font->set;
3065
3066 /*
3067 * Nothing was found in the cache. Now use
3068 * some dozen of Fontconfig calls to get the
3069 * font for one single character.
3070 */
3071 fcpattern = FcPatternDuplicate(font->pattern);
3072 fccharset = FcCharSetCreate();
3073
3074 FcCharSetAddChar(fccharset, u8char);
3075 FcPatternAddCharSet(fcpattern, FC_CHARSET,
3076 fccharset);
3077 FcPatternAddBool(fcpattern, FC_SCALABLE,
3078 FcTrue);
3079
3080 FcConfigSubstitute(0, fcpattern,
3081 FcMatchPattern);
3082 FcDefaultSubstitute(fcpattern);
3083
3084 fontpattern = FcFontSetMatch(0, fcsets,
3085 FcTrue, fcpattern, &fcres);
3086
3087 /*
3088 * Overwrite or create the new cache entry.
3089 */
3090 frccur++;
3091 frclen++;
3092 if(frccur >= LEN(frc))
3093 frccur = 0;
3094 if(frclen > LEN(frc)) {
3095 frclen = LEN(frc);
3096 XftFontClose(xw.dpy, frc[frccur].font);
3097 }
3098
3099 frc[frccur].font = XftFontOpenPattern(xw.dpy,
3100 fontpattern);
3101 frc[frccur].c = u8char;
3102 frc[frccur].flags = frcflags;
3103
3104 FcPatternDestroy(fcpattern);
3105 FcCharSetDestroy(fccharset);
3106
3107 frp = frccur;
3108 }
3109
3110 XftDrawStringUtf8(xw.draw, fg, frc[frp].font,
3111 xp, winy + frc[frp].font->ascent,
3112 (FcChar8 *)u8c, u8cblen);
3113
3114 xp += font->width;
3115 }
3116
3117 /*
3118 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
3119 winy + font->ascent, (FcChar8 *)s, bytelen);
3120 */
3121
3122 if(base.mode & ATTR_UNDERLINE) {
3123 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
3124 width, 1);
3125 }
3126
3127 /* Reset clip to none. */
3128 XftDrawSetClip(xw.draw, 0);
3129 }
3130
3131 void
3132 xdrawcursor(void) {
3133 static int oldx = 0, oldy = 0;
3134 int sl;
3135 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
3136
3137 LIMIT(oldx, 0, term.col-1);
3138 LIMIT(oldy, 0, term.row-1);
3139
3140 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
3141
3142 /* remove the old cursor */
3143 sl = utf8size(term.line[oldy][oldx].c);
3144 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
3145 oldy, 1, sl);
3146
3147 /* draw the new one */
3148 if(!(IS_SET(MODE_HIDE))) {
3149 if(xw.state & WIN_FOCUSED) {
3150 if(IS_SET(MODE_REVERSE)) {
3151 g.mode |= ATTR_REVERSE;
3152 g.fg = defaultcs;
3153 g.bg = defaultfg;
3154 }
3155
3156 sl = utf8size(g.c);
3157 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
3158 } else {
3159 XftDrawRect(xw.draw, &dc.col[defaultcs],
3160 borderpx + term.c.x * xw.cw,
3161 borderpx + term.c.y * xw.ch,
3162 xw.cw - 1, 1);
3163 XftDrawRect(xw.draw, &dc.col[defaultcs],
3164 borderpx + term.c.x * xw.cw,
3165 borderpx + term.c.y * xw.ch,
3166 1, xw.ch - 1);
3167 XftDrawRect(xw.draw, &dc.col[defaultcs],
3168 borderpx + (term.c.x + 1) * xw.cw - 1,
3169 borderpx + term.c.y * xw.ch,
3170 1, xw.ch - 1);
3171 XftDrawRect(xw.draw, &dc.col[defaultcs],
3172 borderpx + term.c.x * xw.cw,
3173 borderpx + (term.c.y + 1) * xw.ch - 1,
3174 xw.cw, 1);
3175 }
3176 oldx = term.c.x, oldy = term.c.y;
3177 }
3178 }
3179
3180
3181 void
3182 xsettitle(char *p) {
3183 XTextProperty prop;
3184
3185 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3186 &prop);
3187 XSetWMName(xw.dpy, xw.win, &prop);
3188 }
3189
3190 void
3191 xresettitle(void) {
3192 xsettitle(opt_title ? opt_title : "st");
3193 }
3194
3195 void
3196 redraw(int timeout) {
3197 struct timespec tv = {0, timeout * 1000};
3198
3199 tfulldirt();
3200 draw();
3201
3202 if(timeout > 0) {
3203 nanosleep(&tv, NULL);
3204 XSync(xw.dpy, False); /* necessary for a good tput flash */
3205 }
3206 }
3207
3208 void
3209 draw(void) {
3210 drawregion(0, 0, term.col, term.row);
3211 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3212 xw.h, 0, 0);
3213 XSetForeground(xw.dpy, dc.gc,
3214 dc.col[IS_SET(MODE_REVERSE)?
3215 defaultfg : defaultbg].pixel);
3216 }
3217
3218 void
3219 drawregion(int x1, int y1, int x2, int y2) {
3220 int ic, ib, x, y, ox, sl;
3221 Glyph base, new;
3222 char buf[DRAW_BUF_SIZ];
3223 bool ena_sel = sel.ob.x != -1;
3224
3225 if(sel.alt ^ IS_SET(MODE_ALTSCREEN))
3226 ena_sel = 0;
3227
3228 if(!(xw.state & WIN_VISIBLE))
3229 return;
3230
3231 for(y = y1; y < y2; y++) {
3232 if(!term.dirty[y])
3233 continue;
3234
3235 xtermclear(0, y, term.col, y);
3236 term.dirty[y] = 0;
3237 base = term.line[y][0];
3238 ic = ib = ox = 0;
3239 for(x = x1; x < x2; x++) {
3240 new = term.line[y][x];
3241 if(ena_sel && selected(x, y))
3242 new.mode ^= ATTR_REVERSE;
3243 if(ib > 0 && (ATTRCMP(base, new)
3244 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3245 xdraws(buf, base, ox, y, ic, ib);
3246 ic = ib = 0;
3247 }
3248 if(ib == 0) {
3249 ox = x;
3250 base = new;
3251 }
3252
3253 sl = utf8size(new.c);
3254 memcpy(buf+ib, new.c, sl);
3255 ib += sl;
3256 ++ic;
3257 }
3258 if(ib > 0)
3259 xdraws(buf, base, ox, y, ic, ib);
3260 }
3261 xdrawcursor();
3262 }
3263
3264 void
3265 expose(XEvent *ev) {
3266 XExposeEvent *e = &ev->xexpose;
3267
3268 if(xw.state & WIN_REDRAW) {
3269 if(!e->count)
3270 xw.state &= ~WIN_REDRAW;
3271 }
3272 redraw(0);
3273 }
3274
3275 void
3276 visibility(XEvent *ev) {
3277 XVisibilityEvent *e = &ev->xvisibility;
3278
3279 if(e->state == VisibilityFullyObscured) {
3280 xw.state &= ~WIN_VISIBLE;
3281 } else if(!(xw.state & WIN_VISIBLE)) {
3282 /* need a full redraw for next Expose, not just a buf copy */
3283 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3284 }
3285 }
3286
3287 void
3288 unmap(XEvent *ev) {
3289 xw.state &= ~WIN_VISIBLE;
3290 }
3291
3292 void
3293 xseturgency(int add) {
3294 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3295
3296 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
3297 XSetWMHints(xw.dpy, xw.win, h);
3298 XFree(h);
3299 }
3300
3301 void
3302 focus(XEvent *ev) {
3303 XFocusChangeEvent *e = &ev->xfocus;
3304
3305 if(e->mode == NotifyGrab)
3306 return;
3307
3308 if(ev->type == FocusIn) {
3309 XSetICFocus(xw.xic);
3310 xw.state |= WIN_FOCUSED;
3311 xseturgency(0);
3312 } else {
3313 XUnsetICFocus(xw.xic);
3314 xw.state &= ~WIN_FOCUSED;
3315 }
3316 }
3317
3318 inline bool
3319 match(uint mask, uint state) {
3320 state &= ~(ignoremod);
3321
3322 if(mask == XK_NO_MOD && state)
3323 return false;
3324 if(mask != XK_ANY_MOD && mask != XK_NO_MOD && !state)
3325 return false;
3326 if((state & mask) != state)
3327 return false;
3328 return true;
3329 }
3330
3331 void
3332 numlock(const Arg *dummy) {
3333 term.numlock ^= 1;
3334 }
3335
3336 char*
3337 kmap(KeySym k, uint state) {
3338 uint mask;
3339 Key *kp;
3340 int i;
3341
3342 /* Check for mapped keys out of X11 function keys. */
3343 for(i = 0; i < LEN(mappedkeys); i++) {
3344 if(mappedkeys[i] == k)
3345 break;
3346 }
3347 if(i == LEN(mappedkeys)) {
3348 if((k & 0xFFFF) < 0xFD00)
3349 return NULL;
3350 }
3351
3352 for(kp = key; kp < key + LEN(key); kp++) {
3353 mask = kp->mask;
3354
3355 if(kp->k != k)
3356 continue;
3357
3358 if(!match(mask, state))
3359 continue;
3360
3361 if(kp->appkey > 0) {
3362 if(!IS_SET(MODE_APPKEYPAD))
3363 continue;
3364 if(term.numlock && kp->appkey == 2)
3365 continue;
3366 } else if(kp->appkey < 0 && IS_SET(MODE_APPKEYPAD)) {
3367 continue;
3368 }
3369
3370 if((kp->appcursor < 0 && IS_SET(MODE_APPCURSOR)) ||
3371 (kp->appcursor > 0
3372 && !IS_SET(MODE_APPCURSOR))) {
3373 continue;
3374 }
3375
3376 if((kp->crlf < 0 && IS_SET(MODE_CRLF)) ||
3377 (kp->crlf > 0 && !IS_SET(MODE_CRLF))) {
3378 continue;
3379 }
3380
3381 return kp->s;
3382 }
3383
3384 return NULL;
3385 }
3386
3387 void
3388 kpress(XEvent *ev) {
3389 XKeyEvent *e = &ev->xkey;
3390 KeySym ksym;
3391 char xstr[31], buf[32], *customkey, *cp = buf;
3392 int len, ret;
3393 long c;
3394 Status status;
3395 Shortcut *bp;
3396
3397 if(IS_SET(MODE_KBDLOCK))
3398 return;
3399
3400 len = XmbLookupString(xw.xic, e, xstr, sizeof(xstr), &ksym, &status);
3401 e->state &= ~Mod2Mask;
3402 /* 1. shortcuts */
3403 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3404 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3405 bp->func(&(bp->arg));
3406 return;
3407 }
3408 }
3409
3410 /* 2. custom keys from config.h */
3411 if((customkey = kmap(ksym, e->state))) {
3412 len = strlen(customkey);
3413 memcpy(buf, customkey, len);
3414 /* 3. hardcoded (overrides X lookup) */
3415 } else {
3416 if(len == 0)
3417 return;
3418
3419 if(len == 1 && e->state & Mod1Mask) {
3420 if(IS_SET(MODE_8BIT)) {
3421 if(*xstr < 0177) {
3422 c = *xstr | B7;
3423 ret = utf8encode(&c, cp);
3424 cp += ret;
3425 len = 0;
3426 }
3427 } else {
3428 *cp++ = '\033';
3429 }
3430 }
3431
3432 memcpy(cp, xstr, len);
3433 len = cp - buf + len;
3434 }
3435
3436 ttywrite(buf, len);
3437 if(IS_SET(MODE_ECHO))
3438 techo(buf, len);
3439 }
3440
3441
3442 void
3443 cmessage(XEvent *e) {
3444 /*
3445 * See xembed specs
3446 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3447 */
3448 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3449 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3450 xw.state |= WIN_FOCUSED;
3451 xseturgency(0);
3452 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3453 xw.state &= ~WIN_FOCUSED;
3454 }
3455 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3456 /* Send SIGHUP to shell */
3457 kill(pid, SIGHUP);
3458 exit(EXIT_SUCCESS);
3459 }
3460 }
3461
3462 void
3463 cresize(int width, int height) {
3464 int col, row;
3465
3466 if(width != 0)
3467 xw.w = width;
3468 if(height != 0)
3469 xw.h = height;
3470
3471 col = (xw.w - 2 * borderpx) / xw.cw;
3472 row = (xw.h - 2 * borderpx) / xw.ch;
3473
3474 tresize(col, row);
3475 xresize(col, row);
3476 ttyresize();
3477 }
3478
3479 void
3480 resize(XEvent *e) {
3481 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3482 return;
3483
3484 cresize(e->xconfigure.width, e->xconfigure.height);
3485 }
3486
3487 void
3488 run(void) {
3489 XEvent ev;
3490 fd_set rfd;
3491 int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3492 struct timeval drawtimeout, *tv = NULL, now, last, lastblink;
3493
3494 gettimeofday(&lastblink, NULL);
3495 gettimeofday(&last, NULL);
3496
3497 for(xev = actionfps;;) {
3498 FD_ZERO(&rfd);
3499 FD_SET(cmdfd, &rfd);
3500 FD_SET(xfd, &rfd);
3501
3502 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
3503 if(errno == EINTR)
3504 continue;
3505 die("select failed: %s\n", SERRNO);
3506 }
3507 if(FD_ISSET(cmdfd, &rfd)) {
3508 ttyread();
3509 if(blinktimeout) {
3510 blinkset = tattrset(ATTR_BLINK);
3511 if(!blinkset && term.mode & ATTR_BLINK)
3512 term.mode &= ~(MODE_BLINK);
3513 }
3514 }
3515
3516 if(FD_ISSET(xfd, &rfd))
3517 xev = actionfps;
3518
3519 gettimeofday(&now, NULL);
3520 drawtimeout.tv_sec = 0;
3521 drawtimeout.tv_usec = (1000/xfps) * 1000;
3522 tv = &drawtimeout;
3523
3524 dodraw = 0;
3525 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
3526 tsetdirtattr(ATTR_BLINK);
3527 term.mode ^= MODE_BLINK;
3528 gettimeofday(&lastblink, NULL);
3529 dodraw = 1;
3530 }
3531 if(TIMEDIFF(now, last) \
3532 > (xev? (1000/xfps) : (1000/actionfps))) {
3533 dodraw = 1;
3534 last = now;
3535 }
3536
3537 if(dodraw) {
3538 while(XPending(xw.dpy)) {
3539 XNextEvent(xw.dpy, &ev);
3540 if(XFilterEvent(&ev, None))
3541 continue;
3542 if(handler[ev.type])
3543 (handler[ev.type])(&ev);
3544 }
3545
3546 draw();
3547 XFlush(xw.dpy);
3548
3549 if(xev && !FD_ISSET(xfd, &rfd))
3550 xev--;
3551 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
3552 if(blinkset) {
3553 if(TIMEDIFF(now, lastblink) \
3554 > blinktimeout) {
3555 drawtimeout.tv_usec = 1;
3556 } else {
3557 drawtimeout.tv_usec = (1000 * \
3558 (blinktimeout - \
3559 TIMEDIFF(now,
3560 lastblink)));
3561 }
3562 } else {
3563 tv = NULL;
3564 }
3565 }
3566 }
3567 }
3568 }
3569
3570 void
3571 usage(void) {
3572 die("%s " VERSION " (c) 2010-2013 st engineers\n" \
3573 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]" \
3574 " [-t title] [-w windowid] [-e command ...]\n", argv0);
3575 }
3576
3577 int
3578 main(int argc, char *argv[]) {
3579 int bitm, xr, yr;
3580 uint wr, hr;
3581
3582 xw.fw = xw.fh = xw.fx = xw.fy = 0;
3583 xw.isfixed = False;
3584
3585 ARGBEGIN {
3586 case 'a':
3587 allowaltscreen = false;
3588 break;
3589 case 'c':
3590 opt_class = EARGF(usage());
3591 break;
3592 case 'e':
3593 /* eat all remaining arguments */
3594 if(argc > 1)
3595 opt_cmd = &argv[1];
3596 goto run;
3597 case 'f':
3598 opt_font = EARGF(usage());
3599 break;
3600 case 'g':
3601 bitm = XParseGeometry(EARGF(usage()), &xr, &yr, &wr, &hr);
3602 if(bitm & XValue)
3603 xw.fx = xr;
3604 if(bitm & YValue)
3605 xw.fy = yr;
3606 if(bitm & WidthValue)
3607 xw.fw = (int)wr;
3608 if(bitm & HeightValue)
3609 xw.fh = (int)hr;
3610 if(bitm & XNegative && xw.fx == 0)
3611 xw.fx = -1;
3612 if(bitm & XNegative && xw.fy == 0)
3613 xw.fy = -1;
3614
3615 if(xw.fh != 0 && xw.fw != 0)
3616 xw.isfixed = True;
3617 break;
3618 case 'o':
3619 opt_io = EARGF(usage());
3620 break;
3621 case 't':
3622 opt_title = EARGF(usage());
3623 break;
3624 case 'w':
3625 opt_embed = EARGF(usage());
3626 break;
3627 case 'v':
3628 default:
3629 usage();
3630 } ARGEND;
3631
3632 run:
3633 setlocale(LC_CTYPE, "");
3634 XSetLocaleModifiers("");
3635 tnew(80, 24);
3636 xinit();
3637 ttynew();
3638 selinit();
3639 if(xw.isfixed)
3640 cresize(xw.h, xw.w);
3641 run();
3642
3643 return 0;
3644 }
3645