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Fixing the selection in a single line again.
[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
792 selsort();
793
794 sel.type = SEL_REGULAR;
795 for(type = 1; type < LEN(selmasks); ++type) {
796 if(match(selmasks[type], state)) {
797 sel.type = type;
798 break;
799 }
800 }
801 }
802
803 void
804 mousereport(XEvent *e) {
805 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
806 button = e->xbutton.button, state = e->xbutton.state,
807 len;
808 char buf[40];
809 static int ob, ox, oy;
810
811 /* from urxvt */
812 if(e->xbutton.type == MotionNotify) {
813 if(!IS_SET(MODE_MOUSEMOTION) || (x == ox && y == oy))
814 return;
815 button = ob + 32;
816 ox = x;
817 oy = y;
818 } else if(!IS_SET(MODE_MOUSESGR)
819 && (e->xbutton.type == ButtonRelease
820 || button == AnyButton)) {
821 button = 3;
822 } else {
823 button -= Button1;
824 if(button >= 3)
825 button += 64 - 3;
826 if(e->xbutton.type == ButtonPress) {
827 ob = button;
828 ox = x;
829 oy = y;
830 }
831 }
832
833 button += (state & ShiftMask ? 4 : 0)
834 + (state & Mod4Mask ? 8 : 0)
835 + (state & ControlMask ? 16 : 0);
836
837 len = 0;
838 if(IS_SET(MODE_MOUSESGR)) {
839 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
840 button, x+1, y+1,
841 e->xbutton.type == ButtonRelease ? 'm' : 'M');
842 } else if(x < 223 && y < 223) {
843 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
844 32+button, 32+x+1, 32+y+1);
845 } else {
846 return;
847 }
848
849 ttywrite(buf, len);
850 }
851
852 void
853 bpress(XEvent *e) {
854 struct timeval now;
855 Mousekey *mk;
856
857 if(IS_SET(MODE_MOUSE)) {
858 mousereport(e);
859 return;
860 }
861
862 for(mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
863 if(e->xbutton.button == mk->b
864 && match(mk->mask, e->xbutton.state)) {
865 ttywrite(mk->s, strlen(mk->s));
866 if(IS_SET(MODE_ECHO))
867 techo(mk->s, strlen(mk->s));
868 return;
869 }
870 }
871
872 if(e->xbutton.button == Button1) {
873 gettimeofday(&now, NULL);
874
875 /* Clear previous selection, logically and visually. */
876 if(sel.ob.x != -1) {
877 sel.ob.x = -1;
878 tsetdirt(sel.nb.y, sel.ne.y);
879 draw();
880 }
881 sel.mode = 1;
882 sel.type = SEL_REGULAR;
883 sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
884 sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
885
886 /*
887 * If the user clicks below predefined timeouts specific
888 * snapping behaviour is exposed.
889 */
890 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
891 sel.snap = SNAP_LINE;
892 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
893 sel.snap = SNAP_WORD;
894 } else {
895 sel.snap = 0;
896 }
897 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
898 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
899 selsort();
900
901 /*
902 * Draw selection, unless it's regular and we don't want to
903 * make clicks visible
904 */
905 if(sel.snap != 0) {
906 sel.mode++;
907 tsetdirt(sel.nb.y, sel.ne.y);
908 draw();
909 }
910 sel.tclick2 = sel.tclick1;
911 sel.tclick1 = now;
912 }
913 }
914
915 void
916 selcopy(void) {
917 char *str, *ptr;
918 int x, y, bufsize, size, i, ex;
919 Glyph *gp, *last;
920
921 if(sel.ob.x == -1) {
922 str = NULL;
923 } else {
924 bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
925 ptr = str = xmalloc(bufsize);
926
927 /* append every set & selected glyph to the selection */
928 for(y = sel.nb.y; y < sel.ne.y + 1; y++) {
929 gp = &term.line[y][0];
930 last = gp + term.col;
931
932 while(--last >= gp && !(selected(last - gp, y) && \
933 strcmp(last->c, " ") != 0))
934 /* nothing */;
935
936 for(x = 0; gp <= last; x++, ++gp) {
937 if(!selected(x, y))
938 continue;
939
940 size = utf8size(gp->c);
941 memcpy(ptr, gp->c, size);
942 ptr += size;
943 }
944
945 /*
946 * Copy and pasting of line endings is inconsistent
947 * in the inconsistent terminal and GUI world.
948 * The best solution seems like to produce '\n' when
949 * something is copied from st and convert '\n' to
950 * '\r', when something to be pasted is received by
951 * st.
952 * FIXME: Fix the computer world.
953 */
954 if(y < sel.ne.y && !((gp-1)->mode & ATTR_WRAP))
955 *ptr++ = '\n';
956
957 /*
958 * If the last selected line expands in the selection
959 * after the visible text '\n' is appended.
960 */
961 if(y == sel.ne.y) {
962 i = term.col;
963 while(--i > 0 && term.line[y][i].c[0] == ' ')
964 /* nothing */;
965 ex = sel.ne.x;
966 if(sel.nb.y == sel.ne.y && sel.ne.x < sel.nb.x)
967 ex = sel.nb.x;
968 if(i < ex)
969 *ptr++ = '\n';
970 }
971 }
972 *ptr = 0;
973 }
974 xsetsel(str);
975 }
976
977 void
978 selnotify(XEvent *e) {
979 ulong nitems, ofs, rem;
980 int format;
981 uchar *data, *last, *repl;
982 Atom type;
983
984 ofs = 0;
985 do {
986 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
987 False, AnyPropertyType, &type, &format,
988 &nitems, &rem, &data)) {
989 fprintf(stderr, "Clipboard allocation failed\n");
990 return;
991 }
992
993 /*
994 * As seen in selcopy:
995 * Line endings are inconsistent in the terminal and GUI world
996 * copy and pasting. When receiving some selection data,
997 * replace all '\n' with '\r'.
998 * FIXME: Fix the computer world.
999 */
1000 repl = data;
1001 last = data + nitems * format / 8;
1002 while((repl = memchr(repl, '\n', last - repl))) {
1003 *repl++ = '\r';
1004 }
1005
1006 ttywrite((const char *)data, nitems * format / 8);
1007 XFree(data);
1008 /* number of 32-bit chunks returned */
1009 ofs += nitems * format / 32;
1010 } while(rem > 0);
1011 }
1012
1013 void
1014 selpaste(const Arg *dummy) {
1015 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
1016 xw.win, CurrentTime);
1017 }
1018
1019 void
1020 clippaste(const Arg *dummy) {
1021 Atom clipboard;
1022
1023 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1024 XConvertSelection(xw.dpy, clipboard, sel.xtarget, XA_PRIMARY,
1025 xw.win, CurrentTime);
1026 }
1027
1028 void
1029 selclear(XEvent *e) {
1030 if(sel.ob.x == -1)
1031 return;
1032 sel.ob.x = -1;
1033 tsetdirt(sel.nb.y, sel.ne.y);
1034 }
1035
1036 void
1037 selrequest(XEvent *e) {
1038 XSelectionRequestEvent *xsre;
1039 XSelectionEvent xev;
1040 Atom xa_targets, string;
1041
1042 xsre = (XSelectionRequestEvent *) e;
1043 xev.type = SelectionNotify;
1044 xev.requestor = xsre->requestor;
1045 xev.selection = xsre->selection;
1046 xev.target = xsre->target;
1047 xev.time = xsre->time;
1048 /* reject */
1049 xev.property = None;
1050
1051 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
1052 if(xsre->target == xa_targets) {
1053 /* respond with the supported type */
1054 string = sel.xtarget;
1055 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1056 XA_ATOM, 32, PropModeReplace,
1057 (uchar *) &string, 1);
1058 xev.property = xsre->property;
1059 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
1060 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1061 xsre->target, 8, PropModeReplace,
1062 (uchar *) sel.clip, strlen(sel.clip));
1063 xev.property = xsre->property;
1064 }
1065
1066 /* all done, send a notification to the listener */
1067 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
1068 fprintf(stderr, "Error sending SelectionNotify event\n");
1069 }
1070
1071 void
1072 xsetsel(char *str) {
1073 /* register the selection for both the clipboard and the primary */
1074 Atom clipboard;
1075
1076 free(sel.clip);
1077 sel.clip = str;
1078
1079 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
1080
1081 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1082 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
1083 }
1084
1085 void
1086 brelease(XEvent *e) {
1087 if(IS_SET(MODE_MOUSE)) {
1088 mousereport(e);
1089 return;
1090 }
1091
1092 if(e->xbutton.button == Button2) {
1093 selpaste(NULL);
1094 } else if(e->xbutton.button == Button1) {
1095 if(sel.mode < 2) {
1096 sel.ob.x = -1;
1097 } else {
1098 getbuttoninfo(e);
1099 selcopy();
1100 }
1101 sel.mode = 0;
1102 term.dirty[sel.oe.y] = 1;
1103 }
1104 }
1105
1106 void
1107 bmotion(XEvent *e) {
1108 int oldey, oldex, oldsby, oldsey;
1109
1110 if(IS_SET(MODE_MOUSE)) {
1111 mousereport(e);
1112 return;
1113 }
1114
1115 if(!sel.mode)
1116 return;
1117
1118 sel.mode++;
1119 oldey = sel.oe.y;
1120 oldex = sel.oe.x;
1121 oldsby = sel.nb.y;
1122 oldsey = sel.ne.y;
1123 getbuttoninfo(e);
1124
1125 if(oldey != sel.oe.y || oldex != sel.oe.x)
1126 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
1127 }
1128
1129 void
1130 die(const char *errstr, ...) {
1131 va_list ap;
1132
1133 va_start(ap, errstr);
1134 vfprintf(stderr, errstr, ap);
1135 va_end(ap);
1136 exit(EXIT_FAILURE);
1137 }
1138
1139 void
1140 execsh(void) {
1141 char **args;
1142 char *envshell = getenv("SHELL");
1143 const struct passwd *pass = getpwuid(getuid());
1144 char buf[sizeof(long) * 8 + 1];
1145
1146 unsetenv("COLUMNS");
1147 unsetenv("LINES");
1148 unsetenv("TERMCAP");
1149
1150 if(pass) {
1151 setenv("LOGNAME", pass->pw_name, 1);
1152 setenv("USER", pass->pw_name, 1);
1153 setenv("SHELL", pass->pw_shell, 0);
1154 setenv("HOME", pass->pw_dir, 0);
1155 }
1156
1157 snprintf(buf, sizeof(buf), "%lu", xw.win);
1158 setenv("WINDOWID", buf, 1);
1159
1160 signal(SIGCHLD, SIG_DFL);
1161 signal(SIGHUP, SIG_DFL);
1162 signal(SIGINT, SIG_DFL);
1163 signal(SIGQUIT, SIG_DFL);
1164 signal(SIGTERM, SIG_DFL);
1165 signal(SIGALRM, SIG_DFL);
1166
1167 DEFAULT(envshell, shell);
1168 setenv("TERM", termname, 1);
1169 args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
1170 execvp(args[0], args);
1171 exit(EXIT_FAILURE);
1172 }
1173
1174 void
1175 sigchld(int a) {
1176 int stat = 0;
1177
1178 if(waitpid(pid, &stat, 0) < 0)
1179 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
1180
1181 if(WIFEXITED(stat)) {
1182 exit(WEXITSTATUS(stat));
1183 } else {
1184 exit(EXIT_FAILURE);
1185 }
1186 }
1187
1188 void
1189 ttynew(void) {
1190 int m, s;
1191 struct winsize w = {term.row, term.col, 0, 0};
1192
1193 /* seems to work fine on linux, openbsd and freebsd */
1194 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1195 die("openpty failed: %s\n", SERRNO);
1196
1197 switch(pid = fork()) {
1198 case -1:
1199 die("fork failed\n");
1200 break;
1201 case 0:
1202 setsid(); /* create a new process group */
1203 dup2(s, STDIN_FILENO);
1204 dup2(s, STDOUT_FILENO);
1205 dup2(s, STDERR_FILENO);
1206 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1207 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
1208 close(s);
1209 close(m);
1210 execsh();
1211 break;
1212 default:
1213 close(s);
1214 cmdfd = m;
1215 signal(SIGCHLD, sigchld);
1216 if(opt_io) {
1217 iofd = (!strcmp(opt_io, "-")) ?
1218 STDOUT_FILENO :
1219 open(opt_io, O_WRONLY | O_CREAT, 0666);
1220 if(iofd < 0) {
1221 fprintf(stderr, "Error opening %s:%s\n",
1222 opt_io, strerror(errno));
1223 }
1224 }
1225 }
1226 }
1227
1228 void
1229 dump(char c) {
1230 static int col;
1231
1232 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
1233 if(++col % 10 == 0)
1234 fprintf(stderr, "\n");
1235 }
1236
1237 void
1238 ttyread(void) {
1239 static char buf[BUFSIZ];
1240 static int buflen = 0;
1241 char *ptr;
1242 char s[UTF_SIZ];
1243 int charsize; /* size of utf8 char in bytes */
1244 long utf8c;
1245 int ret;
1246
1247 /* append read bytes to unprocessed bytes */
1248 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1249 die("Couldn't read from shell: %s\n", SERRNO);
1250
1251 /* process every complete utf8 char */
1252 buflen += ret;
1253 ptr = buf;
1254 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
1255 charsize = utf8decode(ptr, &utf8c);
1256 utf8encode(&utf8c, s);
1257 tputc(s, charsize);
1258 ptr += charsize;
1259 buflen -= charsize;
1260 }
1261
1262 /* keep any uncomplete utf8 char for the next call */
1263 memmove(buf, ptr, buflen);
1264 }
1265
1266 void
1267 ttywrite(const char *s, size_t n) {
1268 if(write(cmdfd, s, n) == -1)
1269 die("write error on tty: %s\n", SERRNO);
1270 }
1271
1272 void
1273 ttyresize(void) {
1274 struct winsize w;
1275
1276 w.ws_row = term.row;
1277 w.ws_col = term.col;
1278 w.ws_xpixel = xw.tw;
1279 w.ws_ypixel = xw.th;
1280 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1281 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
1282 }
1283
1284 int
1285 tattrset(int attr) {
1286 int i, j;
1287
1288 for(i = 0; i < term.row-1; i++) {
1289 for(j = 0; j < term.col-1; j++) {
1290 if(term.line[i][j].mode & attr)
1291 return 1;
1292 }
1293 }
1294
1295 return 0;
1296 }
1297
1298 void
1299 tsetdirt(int top, int bot) {
1300 int i;
1301
1302 LIMIT(top, 0, term.row-1);
1303 LIMIT(bot, 0, term.row-1);
1304
1305 for(i = top; i <= bot; i++)
1306 term.dirty[i] = 1;
1307 }
1308
1309 void
1310 tsetdirtattr(int attr) {
1311 int i, j;
1312
1313 for(i = 0; i < term.row-1; i++) {
1314 for(j = 0; j < term.col-1; j++) {
1315 if(term.line[i][j].mode & attr) {
1316 tsetdirt(i, i);
1317 break;
1318 }
1319 }
1320 }
1321 }
1322
1323 void
1324 tfulldirt(void) {
1325 tsetdirt(0, term.row-1);
1326 }
1327
1328 void
1329 tcursor(int mode) {
1330 static TCursor c;
1331
1332 if(mode == CURSOR_SAVE) {
1333 c = term.c;
1334 } else if(mode == CURSOR_LOAD) {
1335 term.c = c;
1336 tmoveto(c.x, c.y);
1337 }
1338 }
1339
1340 void
1341 treset(void) {
1342 uint i;
1343
1344 term.c = (TCursor){{
1345 .mode = ATTR_NULL,
1346 .fg = defaultfg,
1347 .bg = defaultbg
1348 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1349
1350 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1351 for(i = tabspaces; i < term.col; i += tabspaces)
1352 term.tabs[i] = 1;
1353 term.top = 0;
1354 term.bot = term.row - 1;
1355 term.mode = MODE_WRAP;
1356
1357 tclearregion(0, 0, term.col-1, term.row-1);
1358 tmoveto(0, 0);
1359 tcursor(CURSOR_SAVE);
1360 }
1361
1362 void
1363 tnew(int col, int row) {
1364 memset(&term, 0, sizeof(Term));
1365 tresize(col, row);
1366 term.numlock = 1;
1367
1368 treset();
1369 }
1370
1371 void
1372 tswapscreen(void) {
1373 Line *tmp = term.line;
1374
1375 term.line = term.alt;
1376 term.alt = tmp;
1377 term.mode ^= MODE_ALTSCREEN;
1378 tfulldirt();
1379 }
1380
1381 void
1382 tscrolldown(int orig, int n) {
1383 int i;
1384 Line temp;
1385
1386 LIMIT(n, 0, term.bot-orig+1);
1387
1388 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1389
1390 for(i = term.bot; i >= orig+n; i--) {
1391 temp = term.line[i];
1392 term.line[i] = term.line[i-n];
1393 term.line[i-n] = temp;
1394
1395 term.dirty[i] = 1;
1396 term.dirty[i-n] = 1;
1397 }
1398
1399 selscroll(orig, n);
1400 }
1401
1402 void
1403 tscrollup(int orig, int n) {
1404 int i;
1405 Line temp;
1406 LIMIT(n, 0, term.bot-orig+1);
1407
1408 tclearregion(0, orig, term.col-1, orig+n-1);
1409
1410 for(i = orig; i <= term.bot-n; i++) {
1411 temp = term.line[i];
1412 term.line[i] = term.line[i+n];
1413 term.line[i+n] = temp;
1414
1415 term.dirty[i] = 1;
1416 term.dirty[i+n] = 1;
1417 }
1418
1419 selscroll(orig, -n);
1420 }
1421
1422 void
1423 selscroll(int orig, int n) {
1424 if(sel.ob.x == -1)
1425 return;
1426
1427 if(BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
1428 if((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
1429 sel.ob.x = -1;
1430 return;
1431 }
1432 if(sel.type == SEL_RECTANGULAR) {
1433 if(sel.ob.y < term.top)
1434 sel.ob.y = term.top;
1435 if(sel.oe.y > term.bot)
1436 sel.oe.y = term.bot;
1437 } else {
1438 if(sel.ob.y < term.top) {
1439 sel.ob.y = term.top;
1440 sel.ob.x = 0;
1441 }
1442 if(sel.oe.y > term.bot) {
1443 sel.oe.y = term.bot;
1444 sel.oe.x = term.col;
1445 }
1446 }
1447 selsort();
1448 }
1449 }
1450
1451 void
1452 tnewline(int first_col) {
1453 int y = term.c.y;
1454
1455 if(y == term.bot) {
1456 tscrollup(term.top, 1);
1457 } else {
1458 y++;
1459 }
1460 tmoveto(first_col ? 0 : term.c.x, y);
1461 }
1462
1463 void
1464 csiparse(void) {
1465 char *p = csiescseq.buf, *np;
1466 long int v;
1467
1468 csiescseq.narg = 0;
1469 if(*p == '?') {
1470 csiescseq.priv = 1;
1471 p++;
1472 }
1473
1474 csiescseq.buf[csiescseq.len] = '\0';
1475 while(p < csiescseq.buf+csiescseq.len) {
1476 np = NULL;
1477 v = strtol(p, &np, 10);
1478 if(np == p)
1479 v = 0;
1480 if(v == LONG_MAX || v == LONG_MIN)
1481 v = -1;
1482 csiescseq.arg[csiescseq.narg++] = v;
1483 p = np;
1484 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1485 break;
1486 p++;
1487 }
1488 csiescseq.mode = *p;
1489 }
1490
1491 /* for absolute user moves, when decom is set */
1492 void
1493 tmoveato(int x, int y) {
1494 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1495 }
1496
1497 void
1498 tmoveto(int x, int y) {
1499 int miny, maxy;
1500
1501 if(term.c.state & CURSOR_ORIGIN) {
1502 miny = term.top;
1503 maxy = term.bot;
1504 } else {
1505 miny = 0;
1506 maxy = term.row - 1;
1507 }
1508 LIMIT(x, 0, term.col-1);
1509 LIMIT(y, miny, maxy);
1510 term.c.state &= ~CURSOR_WRAPNEXT;
1511 term.c.x = x;
1512 term.c.y = y;
1513 }
1514
1515 void
1516 tsetchar(char *c, Glyph *attr, int x, int y) {
1517 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1518 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1519 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1520 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1521 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1522 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1523 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1524 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1525 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1526 };
1527
1528 /*
1529 * The table is proudly stolen from rxvt.
1530 */
1531 if(attr->mode & ATTR_GFX) {
1532 if(c[0] >= 0x41 && c[0] <= 0x7e
1533 && vt100_0[c[0] - 0x41]) {
1534 c = vt100_0[c[0] - 0x41];
1535 }
1536 }
1537
1538 term.dirty[y] = 1;
1539 term.line[y][x] = *attr;
1540 memcpy(term.line[y][x].c, c, UTF_SIZ);
1541 }
1542
1543 void
1544 tclearregion(int x1, int y1, int x2, int y2) {
1545 int x, y, temp;
1546
1547 if(x1 > x2)
1548 temp = x1, x1 = x2, x2 = temp;
1549 if(y1 > y2)
1550 temp = y1, y1 = y2, y2 = temp;
1551
1552 LIMIT(x1, 0, term.col-1);
1553 LIMIT(x2, 0, term.col-1);
1554 LIMIT(y1, 0, term.row-1);
1555 LIMIT(y2, 0, term.row-1);
1556
1557 for(y = y1; y <= y2; y++) {
1558 term.dirty[y] = 1;
1559 for(x = x1; x <= x2; x++) {
1560 if(selected(x, y))
1561 selclear(NULL);
1562 term.line[y][x] = term.c.attr;
1563 memcpy(term.line[y][x].c, " ", 2);
1564 }
1565 }
1566 }
1567
1568 void
1569 tdeletechar(int n) {
1570 int src = term.c.x + n;
1571 int dst = term.c.x;
1572 int size = term.col - src;
1573
1574 term.dirty[term.c.y] = 1;
1575
1576 if(src >= term.col) {
1577 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1578 return;
1579 }
1580
1581 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1582 size * sizeof(Glyph));
1583 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1584 }
1585
1586 void
1587 tinsertblank(int n) {
1588 int src = term.c.x;
1589 int dst = src + n;
1590 int size = term.col - dst;
1591
1592 term.dirty[term.c.y] = 1;
1593
1594 if(dst >= term.col) {
1595 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1596 return;
1597 }
1598
1599 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1600 size * sizeof(Glyph));
1601 tclearregion(src, term.c.y, dst - 1, term.c.y);
1602 }
1603
1604 void
1605 tinsertblankline(int n) {
1606 if(term.c.y < term.top || term.c.y > term.bot)
1607 return;
1608
1609 tscrolldown(term.c.y, n);
1610 }
1611
1612 void
1613 tdeleteline(int n) {
1614 if(term.c.y < term.top || term.c.y > term.bot)
1615 return;
1616
1617 tscrollup(term.c.y, n);
1618 }
1619
1620 void
1621 tsetattr(int *attr, int l) {
1622 int i;
1623
1624 for(i = 0; i < l; i++) {
1625 switch(attr[i]) {
1626 case 0:
1627 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE \
1628 | ATTR_BOLD | ATTR_ITALIC \
1629 | ATTR_BLINK);
1630 term.c.attr.fg = defaultfg;
1631 term.c.attr.bg = defaultbg;
1632 break;
1633 case 1:
1634 term.c.attr.mode |= ATTR_BOLD;
1635 break;
1636 case 3:
1637 term.c.attr.mode |= ATTR_ITALIC;
1638 break;
1639 case 4:
1640 term.c.attr.mode |= ATTR_UNDERLINE;
1641 break;
1642 case 5: /* slow blink */
1643 case 6: /* rapid blink */
1644 term.c.attr.mode |= ATTR_BLINK;
1645 break;
1646 case 7:
1647 term.c.attr.mode |= ATTR_REVERSE;
1648 break;
1649 case 21:
1650 case 22:
1651 term.c.attr.mode &= ~ATTR_BOLD;
1652 break;
1653 case 23:
1654 term.c.attr.mode &= ~ATTR_ITALIC;
1655 break;
1656 case 24:
1657 term.c.attr.mode &= ~ATTR_UNDERLINE;
1658 break;
1659 case 25:
1660 case 26:
1661 term.c.attr.mode &= ~ATTR_BLINK;
1662 break;
1663 case 27:
1664 term.c.attr.mode &= ~ATTR_REVERSE;
1665 break;
1666 case 38:
1667 if(i + 2 < l && attr[i + 1] == 5) {
1668 i += 2;
1669 if(BETWEEN(attr[i], 0, 255)) {
1670 term.c.attr.fg = attr[i];
1671 } else {
1672 fprintf(stderr,
1673 "erresc: bad fgcolor %d\n",
1674 attr[i]);
1675 }
1676 } else {
1677 fprintf(stderr,
1678 "erresc(38): gfx attr %d unknown\n",
1679 attr[i]);
1680 }
1681 break;
1682 case 39:
1683 term.c.attr.fg = defaultfg;
1684 break;
1685 case 48:
1686 if(i + 2 < l && attr[i + 1] == 5) {
1687 i += 2;
1688 if(BETWEEN(attr[i], 0, 255)) {
1689 term.c.attr.bg = attr[i];
1690 } else {
1691 fprintf(stderr,
1692 "erresc: bad bgcolor %d\n",
1693 attr[i]);
1694 }
1695 } else {
1696 fprintf(stderr,
1697 "erresc(48): gfx attr %d unknown\n",
1698 attr[i]);
1699 }
1700 break;
1701 case 49:
1702 term.c.attr.bg = defaultbg;
1703 break;
1704 default:
1705 if(BETWEEN(attr[i], 30, 37)) {
1706 term.c.attr.fg = attr[i] - 30;
1707 } else if(BETWEEN(attr[i], 40, 47)) {
1708 term.c.attr.bg = attr[i] - 40;
1709 } else if(BETWEEN(attr[i], 90, 97)) {
1710 term.c.attr.fg = attr[i] - 90 + 8;
1711 } else if(BETWEEN(attr[i], 100, 107)) {
1712 term.c.attr.bg = attr[i] - 100 + 8;
1713 } else {
1714 fprintf(stderr,
1715 "erresc(default): gfx attr %d unknown\n",
1716 attr[i]), csidump();
1717 }
1718 break;
1719 }
1720 }
1721 }
1722
1723 void
1724 tsetscroll(int t, int b) {
1725 int temp;
1726
1727 LIMIT(t, 0, term.row-1);
1728 LIMIT(b, 0, term.row-1);
1729 if(t > b) {
1730 temp = t;
1731 t = b;
1732 b = temp;
1733 }
1734 term.top = t;
1735 term.bot = b;
1736 }
1737
1738 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1739
1740 void
1741 tsetmode(bool priv, bool set, int *args, int narg) {
1742 int *lim, mode;
1743 bool alt;
1744
1745 for(lim = args + narg; args < lim; ++args) {
1746 if(priv) {
1747 switch(*args) {
1748 break;
1749 case 1: /* DECCKM -- Cursor key */
1750 MODBIT(term.mode, set, MODE_APPCURSOR);
1751 break;
1752 case 5: /* DECSCNM -- Reverse video */
1753 mode = term.mode;
1754 MODBIT(term.mode, set, MODE_REVERSE);
1755 if(mode != term.mode)
1756 redraw(REDRAW_TIMEOUT);
1757 break;
1758 case 6: /* DECOM -- Origin */
1759 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1760 tmoveato(0, 0);
1761 break;
1762 case 7: /* DECAWM -- Auto wrap */
1763 MODBIT(term.mode, set, MODE_WRAP);
1764 break;
1765 case 0: /* Error (IGNORED) */
1766 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1767 case 3: /* DECCOLM -- Column (IGNORED) */
1768 case 4: /* DECSCLM -- Scroll (IGNORED) */
1769 case 8: /* DECARM -- Auto repeat (IGNORED) */
1770 case 18: /* DECPFF -- Printer feed (IGNORED) */
1771 case 19: /* DECPEX -- Printer extent (IGNORED) */
1772 case 42: /* DECNRCM -- National characters (IGNORED) */
1773 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1774 break;
1775 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1776 MODBIT(term.mode, !set, MODE_HIDE);
1777 break;
1778 case 1000: /* 1000,1002: enable xterm mouse report */
1779 MODBIT(term.mode, set, MODE_MOUSEBTN);
1780 MODBIT(term.mode, 0, MODE_MOUSEMOTION);
1781 break;
1782 case 1002:
1783 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1784 MODBIT(term.mode, 0, MODE_MOUSEBTN);
1785 break;
1786 case 1006:
1787 MODBIT(term.mode, set, MODE_MOUSESGR);
1788 break;
1789 case 1034:
1790 MODBIT(term.mode, set, MODE_8BIT);
1791 break;
1792 case 1049: /* = 1047 and 1048 */
1793 case 47:
1794 case 1047:
1795 if (!allowaltscreen)
1796 break;
1797
1798 alt = IS_SET(MODE_ALTSCREEN);
1799 if(alt) {
1800 tclearregion(0, 0, term.col-1,
1801 term.row-1);
1802 }
1803 if(set ^ alt) /* set is always 1 or 0 */
1804 tswapscreen();
1805 if(*args != 1049)
1806 break;
1807 /* FALLTRU */
1808 case 1048:
1809 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1810 break;
1811 default:
1812 fprintf(stderr,
1813 "erresc: unknown private set/reset mode %d\n",
1814 *args);
1815 break;
1816 }
1817 } else {
1818 switch(*args) {
1819 case 0: /* Error (IGNORED) */
1820 break;
1821 case 2: /* KAM -- keyboard action */
1822 MODBIT(term.mode, set, MODE_KBDLOCK);
1823 break;
1824 case 4: /* IRM -- Insertion-replacement */
1825 MODBIT(term.mode, set, MODE_INSERT);
1826 break;
1827 case 12: /* SRM -- Send/Receive */
1828 MODBIT(term.mode, !set, MODE_ECHO);
1829 break;
1830 case 20: /* LNM -- Linefeed/new line */
1831 MODBIT(term.mode, set, MODE_CRLF);
1832 break;
1833 default:
1834 fprintf(stderr,
1835 "erresc: unknown set/reset mode %d\n",
1836 *args);
1837 break;
1838 }
1839 }
1840 }
1841 }
1842 #undef MODBIT
1843
1844
1845 void
1846 csihandle(void) {
1847 switch(csiescseq.mode) {
1848 default:
1849 unknown:
1850 fprintf(stderr, "erresc: unknown csi ");
1851 csidump();
1852 /* die(""); */
1853 break;
1854 case '@': /* ICH -- Insert <n> blank char */
1855 DEFAULT(csiescseq.arg[0], 1);
1856 tinsertblank(csiescseq.arg[0]);
1857 break;
1858 case 'A': /* CUU -- Cursor <n> Up */
1859 DEFAULT(csiescseq.arg[0], 1);
1860 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1861 break;
1862 case 'B': /* CUD -- Cursor <n> Down */
1863 case 'e': /* VPR --Cursor <n> Down */
1864 DEFAULT(csiescseq.arg[0], 1);
1865 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1866 break;
1867 case 'c': /* DA -- Device Attributes */
1868 if(csiescseq.arg[0] == 0)
1869 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1870 break;
1871 case 'C': /* CUF -- Cursor <n> Forward */
1872 case 'a': /* HPR -- Cursor <n> Forward */
1873 DEFAULT(csiescseq.arg[0], 1);
1874 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1875 break;
1876 case 'D': /* CUB -- Cursor <n> Backward */
1877 DEFAULT(csiescseq.arg[0], 1);
1878 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1879 break;
1880 case 'E': /* CNL -- Cursor <n> Down and first col */
1881 DEFAULT(csiescseq.arg[0], 1);
1882 tmoveto(0, term.c.y+csiescseq.arg[0]);
1883 break;
1884 case 'F': /* CPL -- Cursor <n> Up and first col */
1885 DEFAULT(csiescseq.arg[0], 1);
1886 tmoveto(0, term.c.y-csiescseq.arg[0]);
1887 break;
1888 case 'g': /* TBC -- Tabulation clear */
1889 switch(csiescseq.arg[0]) {
1890 case 0: /* clear current tab stop */
1891 term.tabs[term.c.x] = 0;
1892 break;
1893 case 3: /* clear all the tabs */
1894 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1895 break;
1896 default:
1897 goto unknown;
1898 }
1899 break;
1900 case 'G': /* CHA -- Move to <col> */
1901 case '`': /* HPA */
1902 DEFAULT(csiescseq.arg[0], 1);
1903 tmoveto(csiescseq.arg[0]-1, term.c.y);
1904 break;
1905 case 'H': /* CUP -- Move to <row> <col> */
1906 case 'f': /* HVP */
1907 DEFAULT(csiescseq.arg[0], 1);
1908 DEFAULT(csiescseq.arg[1], 1);
1909 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1910 break;
1911 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1912 DEFAULT(csiescseq.arg[0], 1);
1913 while(csiescseq.arg[0]--)
1914 tputtab(1);
1915 break;
1916 case 'J': /* ED -- Clear screen */
1917 sel.ob.x = -1;
1918 switch(csiescseq.arg[0]) {
1919 case 0: /* below */
1920 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1921 if(term.c.y < term.row-1) {
1922 tclearregion(0, term.c.y+1, term.col-1,
1923 term.row-1);
1924 }
1925 break;
1926 case 1: /* above */
1927 if(term.c.y > 1)
1928 tclearregion(0, 0, term.col-1, term.c.y-1);
1929 tclearregion(0, term.c.y, term.c.x, term.c.y);
1930 break;
1931 case 2: /* all */
1932 tclearregion(0, 0, term.col-1, term.row-1);
1933 break;
1934 default:
1935 goto unknown;
1936 }
1937 break;
1938 case 'K': /* EL -- Clear line */
1939 switch(csiescseq.arg[0]) {
1940 case 0: /* right */
1941 tclearregion(term.c.x, term.c.y, term.col-1,
1942 term.c.y);
1943 break;
1944 case 1: /* left */
1945 tclearregion(0, term.c.y, term.c.x, term.c.y);
1946 break;
1947 case 2: /* all */
1948 tclearregion(0, term.c.y, term.col-1, term.c.y);
1949 break;
1950 }
1951 break;
1952 case 'S': /* SU -- Scroll <n> line up */
1953 DEFAULT(csiescseq.arg[0], 1);
1954 tscrollup(term.top, csiescseq.arg[0]);
1955 break;
1956 case 'T': /* SD -- Scroll <n> line down */
1957 DEFAULT(csiescseq.arg[0], 1);
1958 tscrolldown(term.top, csiescseq.arg[0]);
1959 break;
1960 case 'L': /* IL -- Insert <n> blank lines */
1961 DEFAULT(csiescseq.arg[0], 1);
1962 tinsertblankline(csiescseq.arg[0]);
1963 break;
1964 case 'l': /* RM -- Reset Mode */
1965 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
1966 break;
1967 case 'M': /* DL -- Delete <n> lines */
1968 DEFAULT(csiescseq.arg[0], 1);
1969 tdeleteline(csiescseq.arg[0]);
1970 break;
1971 case 'X': /* ECH -- Erase <n> char */
1972 DEFAULT(csiescseq.arg[0], 1);
1973 tclearregion(term.c.x, term.c.y,
1974 term.c.x + csiescseq.arg[0] - 1, term.c.y);
1975 break;
1976 case 'P': /* DCH -- Delete <n> char */
1977 DEFAULT(csiescseq.arg[0], 1);
1978 tdeletechar(csiescseq.arg[0]);
1979 break;
1980 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
1981 DEFAULT(csiescseq.arg[0], 1);
1982 while(csiescseq.arg[0]--)
1983 tputtab(0);
1984 break;
1985 case 'd': /* VPA -- Move to <row> */
1986 DEFAULT(csiescseq.arg[0], 1);
1987 tmoveato(term.c.x, csiescseq.arg[0]-1);
1988 break;
1989 case 'h': /* SM -- Set terminal mode */
1990 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
1991 break;
1992 case 'm': /* SGR -- Terminal attribute (color) */
1993 tsetattr(csiescseq.arg, csiescseq.narg);
1994 break;
1995 case 'r': /* DECSTBM -- Set Scrolling Region */
1996 if(csiescseq.priv) {
1997 goto unknown;
1998 } else {
1999 DEFAULT(csiescseq.arg[0], 1);
2000 DEFAULT(csiescseq.arg[1], term.row);
2001 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
2002 tmoveato(0, 0);
2003 }
2004 break;
2005 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
2006 tcursor(CURSOR_SAVE);
2007 break;
2008 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
2009 tcursor(CURSOR_LOAD);
2010 break;
2011 }
2012 }
2013
2014 void
2015 csidump(void) {
2016 int i;
2017 uint c;
2018
2019 printf("ESC[");
2020 for(i = 0; i < csiescseq.len; i++) {
2021 c = csiescseq.buf[i] & 0xff;
2022 if(isprint(c)) {
2023 putchar(c);
2024 } else if(c == '\n') {
2025 printf("(\\n)");
2026 } else if(c == '\r') {
2027 printf("(\\r)");
2028 } else if(c == 0x1b) {
2029 printf("(\\e)");
2030 } else {
2031 printf("(%02x)", c);
2032 }
2033 }
2034 putchar('\n');
2035 }
2036
2037 void
2038 csireset(void) {
2039 memset(&csiescseq, 0, sizeof(csiescseq));
2040 }
2041
2042 void
2043 strhandle(void) {
2044 char *p = NULL;
2045 int i, j, narg;
2046
2047 strparse();
2048 narg = strescseq.narg;
2049
2050 switch(strescseq.type) {
2051 case ']': /* OSC -- Operating System Command */
2052 switch(i = atoi(strescseq.args[0])) {
2053 case 0:
2054 case 1:
2055 case 2:
2056 if(narg > 1)
2057 xsettitle(strescseq.args[1]);
2058 break;
2059 case 4: /* color set */
2060 if(narg < 3)
2061 break;
2062 p = strescseq.args[2];
2063 /* fall through */
2064 case 104: /* color reset, here p = NULL */
2065 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2066 if (!xsetcolorname(j, p)) {
2067 fprintf(stderr, "erresc: invalid color %s\n", p);
2068 } else {
2069 /*
2070 * TODO if defaultbg color is changed, borders
2071 * are dirty
2072 */
2073 redraw(0);
2074 }
2075 break;
2076 default:
2077 fprintf(stderr, "erresc: unknown str ");
2078 strdump();
2079 break;
2080 }
2081 break;
2082 case 'k': /* old title set compatibility */
2083 xsettitle(strescseq.args[0]);
2084 break;
2085 case 'P': /* DSC -- Device Control String */
2086 case '_': /* APC -- Application Program Command */
2087 case '^': /* PM -- Privacy Message */
2088 default:
2089 fprintf(stderr, "erresc: unknown str ");
2090 strdump();
2091 /* die(""); */
2092 break;
2093 }
2094 }
2095
2096 void
2097 strparse(void) {
2098 char *p = strescseq.buf;
2099
2100 strescseq.narg = 0;
2101 strescseq.buf[strescseq.len] = '\0';
2102 while(p && strescseq.narg < STR_ARG_SIZ)
2103 strescseq.args[strescseq.narg++] = strsep(&p, ";");
2104 }
2105
2106 void
2107 strdump(void) {
2108 int i;
2109 uint c;
2110
2111 printf("ESC%c", strescseq.type);
2112 for(i = 0; i < strescseq.len; i++) {
2113 c = strescseq.buf[i] & 0xff;
2114 if(c == '\0') {
2115 return;
2116 } else if(isprint(c)) {
2117 putchar(c);
2118 } else if(c == '\n') {
2119 printf("(\\n)");
2120 } else if(c == '\r') {
2121 printf("(\\r)");
2122 } else if(c == 0x1b) {
2123 printf("(\\e)");
2124 } else {
2125 printf("(%02x)", c);
2126 }
2127 }
2128 printf("ESC\\\n");
2129 }
2130
2131 void
2132 strreset(void) {
2133 memset(&strescseq, 0, sizeof(strescseq));
2134 }
2135
2136 void
2137 tputtab(bool forward) {
2138 uint x = term.c.x;
2139
2140 if(forward) {
2141 if(x == term.col)
2142 return;
2143 for(++x; x < term.col && !term.tabs[x]; ++x)
2144 /* nothing */ ;
2145 } else {
2146 if(x == 0)
2147 return;
2148 for(--x; x > 0 && !term.tabs[x]; --x)
2149 /* nothing */ ;
2150 }
2151 tmoveto(x, term.c.y);
2152 }
2153
2154 void
2155 techo(char *buf, int len) {
2156 for(; len > 0; buf++, len--) {
2157 char c = *buf;
2158
2159 if(c == '\033') { /* escape */
2160 tputc("^", 1);
2161 tputc("[", 1);
2162 } else if(c < '\x20') { /* control code */
2163 if(c != '\n' && c != '\r' && c != '\t') {
2164 c |= '\x40';
2165 tputc("^", 1);
2166 }
2167 tputc(&c, 1);
2168 } else {
2169 break;
2170 }
2171 }
2172 if(len)
2173 tputc(buf, len);
2174 }
2175
2176 void
2177 tputc(char *c, int len) {
2178 uchar ascii = *c;
2179 bool control = ascii < '\x20' || ascii == 0177;
2180
2181 if(iofd != -1) {
2182 if(xwrite(iofd, c, len) < 0) {
2183 fprintf(stderr, "Error writing in %s:%s\n",
2184 opt_io, strerror(errno));
2185 close(iofd);
2186 iofd = -1;
2187 }
2188 }
2189
2190 /*
2191 * STR sequences must be checked before anything else
2192 * because it can use some control codes as part of the sequence.
2193 */
2194 if(term.esc & ESC_STR) {
2195 switch(ascii) {
2196 case '\033':
2197 term.esc = ESC_START | ESC_STR_END;
2198 break;
2199 case '\a': /* backwards compatibility to xterm */
2200 term.esc = 0;
2201 strhandle();
2202 break;
2203 default:
2204 if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2205 memmove(&strescseq.buf[strescseq.len], c, len);
2206 strescseq.len += len;
2207 } else {
2208 /*
2209 * Here is a bug in terminals. If the user never sends
2210 * some code to stop the str or esc command, then st
2211 * will stop responding. But this is better than
2212 * silently failing with unknown characters. At least
2213 * then users will report back.
2214 *
2215 * In the case users ever get fixed, here is the code:
2216 */
2217 /*
2218 * term.esc = 0;
2219 * strhandle();
2220 */
2221 }
2222 }
2223 return;
2224 }
2225
2226 /*
2227 * Actions of control codes must be performed as soon they arrive
2228 * because they can be embedded inside a control sequence, and
2229 * they must not cause conflicts with sequences.
2230 */
2231 if(control) {
2232 switch(ascii) {
2233 case '\t': /* HT */
2234 tputtab(1);
2235 return;
2236 case '\b': /* BS */
2237 tmoveto(term.c.x-1, term.c.y);
2238 return;
2239 case '\r': /* CR */
2240 tmoveto(0, term.c.y);
2241 return;
2242 case '\f': /* LF */
2243 case '\v': /* VT */
2244 case '\n': /* LF */
2245 /* go to first col if the mode is set */
2246 tnewline(IS_SET(MODE_CRLF));
2247 return;
2248 case '\a': /* BEL */
2249 if(!(xw.state & WIN_FOCUSED))
2250 xseturgency(1);
2251 return;
2252 case '\033': /* ESC */
2253 csireset();
2254 term.esc = ESC_START;
2255 return;
2256 case '\016': /* SO */
2257 case '\017': /* SI */
2258 /*
2259 * Different charsets are hard to handle. Applications
2260 * should use the right alt charset escapes for the
2261 * only reason they still exist: line drawing. The
2262 * rest is incompatible history st should not support.
2263 */
2264 return;
2265 case '\032': /* SUB */
2266 case '\030': /* CAN */
2267 csireset();
2268 return;
2269 case '\005': /* ENQ (IGNORED) */
2270 case '\000': /* NUL (IGNORED) */
2271 case '\021': /* XON (IGNORED) */
2272 case '\023': /* XOFF (IGNORED) */
2273 case 0177: /* DEL (IGNORED) */
2274 return;
2275 }
2276 } else if(term.esc & ESC_START) {
2277 if(term.esc & ESC_CSI) {
2278 csiescseq.buf[csiescseq.len++] = ascii;
2279 if(BETWEEN(ascii, 0x40, 0x7E)
2280 || csiescseq.len >= \
2281 sizeof(csiescseq.buf)-1) {
2282 term.esc = 0;
2283 csiparse();
2284 csihandle();
2285 }
2286 } else if(term.esc & ESC_STR_END) {
2287 term.esc = 0;
2288 if(ascii == '\\')
2289 strhandle();
2290 } else if(term.esc & ESC_ALTCHARSET) {
2291 switch(ascii) {
2292 case '0': /* Line drawing set */
2293 term.c.attr.mode |= ATTR_GFX;
2294 break;
2295 case 'B': /* USASCII */
2296 term.c.attr.mode &= ~ATTR_GFX;
2297 break;
2298 case 'A': /* UK (IGNORED) */
2299 case '<': /* multinational charset (IGNORED) */
2300 case '5': /* Finnish (IGNORED) */
2301 case 'C': /* Finnish (IGNORED) */
2302 case 'K': /* German (IGNORED) */
2303 break;
2304 default:
2305 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2306 }
2307 term.esc = 0;
2308 } else if(term.esc & ESC_TEST) {
2309 if(ascii == '8') { /* DEC screen alignment test. */
2310 char E[UTF_SIZ] = "E";
2311 int x, y;
2312
2313 for(x = 0; x < term.col; ++x) {
2314 for(y = 0; y < term.row; ++y)
2315 tsetchar(E, &term.c.attr, x, y);
2316 }
2317 }
2318 term.esc = 0;
2319 } else {
2320 switch(ascii) {
2321 case '[':
2322 term.esc |= ESC_CSI;
2323 break;
2324 case '#':
2325 term.esc |= ESC_TEST;
2326 break;
2327 case 'P': /* DCS -- Device Control String */
2328 case '_': /* APC -- Application Program Command */
2329 case '^': /* PM -- Privacy Message */
2330 case ']': /* OSC -- Operating System Command */
2331 case 'k': /* old title set compatibility */
2332 strreset();
2333 strescseq.type = ascii;
2334 term.esc |= ESC_STR;
2335 break;
2336 case '(': /* set primary charset G0 */
2337 term.esc |= ESC_ALTCHARSET;
2338 break;
2339 case ')': /* set secondary charset G1 (IGNORED) */
2340 case '*': /* set tertiary charset G2 (IGNORED) */
2341 case '+': /* set quaternary charset G3 (IGNORED) */
2342 term.esc = 0;
2343 break;
2344 case 'D': /* IND -- Linefeed */
2345 if(term.c.y == term.bot) {
2346 tscrollup(term.top, 1);
2347 } else {
2348 tmoveto(term.c.x, term.c.y+1);
2349 }
2350 term.esc = 0;
2351 break;
2352 case 'E': /* NEL -- Next line */
2353 tnewline(1); /* always go to first col */
2354 term.esc = 0;
2355 break;
2356 case 'H': /* HTS -- Horizontal tab stop */
2357 term.tabs[term.c.x] = 1;
2358 term.esc = 0;
2359 break;
2360 case 'M': /* RI -- Reverse index */
2361 if(term.c.y == term.top) {
2362 tscrolldown(term.top, 1);
2363 } else {
2364 tmoveto(term.c.x, term.c.y-1);
2365 }
2366 term.esc = 0;
2367 break;
2368 case 'Z': /* DECID -- Identify Terminal */
2369 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2370 term.esc = 0;
2371 break;
2372 case 'c': /* RIS -- Reset to inital state */
2373 treset();
2374 term.esc = 0;
2375 xresettitle();
2376 break;
2377 case '=': /* DECPAM -- Application keypad */
2378 term.mode |= MODE_APPKEYPAD;
2379 term.esc = 0;
2380 break;
2381 case '>': /* DECPNM -- Normal keypad */
2382 term.mode &= ~MODE_APPKEYPAD;
2383 term.esc = 0;
2384 break;
2385 case '7': /* DECSC -- Save Cursor */
2386 tcursor(CURSOR_SAVE);
2387 term.esc = 0;
2388 break;
2389 case '8': /* DECRC -- Restore Cursor */
2390 tcursor(CURSOR_LOAD);
2391 term.esc = 0;
2392 break;
2393 case '\\': /* ST -- Stop */
2394 term.esc = 0;
2395 break;
2396 default:
2397 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2398 (uchar) ascii, isprint(ascii)? ascii:'.');
2399 term.esc = 0;
2400 }
2401 }
2402 /*
2403 * All characters which form part of a sequence are not
2404 * printed
2405 */
2406 return;
2407 }
2408 /*
2409 * Display control codes only if we are in graphic mode
2410 */
2411 if(control && !(term.c.attr.mode & ATTR_GFX))
2412 return;
2413 if(sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
2414 sel.ob.x = -1;
2415 if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2416 term.line[term.c.y][term.c.x].mode |= ATTR_WRAP;
2417 tnewline(1);
2418 }
2419
2420 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col) {
2421 memmove(&term.line[term.c.y][term.c.x+1],
2422 &term.line[term.c.y][term.c.x],
2423 (term.col - term.c.x - 1) * sizeof(Glyph));
2424 }
2425
2426 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2427 if(term.c.x+1 < term.col) {
2428 tmoveto(term.c.x+1, term.c.y);
2429 } else {
2430 term.c.state |= CURSOR_WRAPNEXT;
2431 }
2432 }
2433
2434 int
2435 tresize(int col, int row) {
2436 int i;
2437 int minrow = MIN(row, term.row);
2438 int mincol = MIN(col, term.col);
2439 int slide = term.c.y - row + 1;
2440 bool *bp;
2441 Line *orig;
2442
2443 if(col < 1 || row < 1)
2444 return 0;
2445
2446 /* free unneeded rows */
2447 i = 0;
2448 if(slide > 0) {
2449 /*
2450 * slide screen to keep cursor where we expect it -
2451 * tscrollup would work here, but we can optimize to
2452 * memmove because we're freeing the earlier lines
2453 */
2454 for(/* i = 0 */; i < slide; i++) {
2455 free(term.line[i]);
2456 free(term.alt[i]);
2457 }
2458 memmove(term.line, term.line + slide, row * sizeof(Line));
2459 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2460 }
2461 for(i += row; i < term.row; i++) {
2462 free(term.line[i]);
2463 free(term.alt[i]);
2464 }
2465
2466 /* resize to new height */
2467 term.line = xrealloc(term.line, row * sizeof(Line));
2468 term.alt = xrealloc(term.alt, row * sizeof(Line));
2469 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2470 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2471
2472 /* resize each row to new width, zero-pad if needed */
2473 for(i = 0; i < minrow; i++) {
2474 term.dirty[i] = 1;
2475 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2476 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2477 }
2478
2479 /* allocate any new rows */
2480 for(/* i == minrow */; i < row; i++) {
2481 term.dirty[i] = 1;
2482 term.line[i] = xcalloc(col, sizeof(Glyph));
2483 term.alt [i] = xcalloc(col, sizeof(Glyph));
2484 }
2485 if(col > term.col) {
2486 bp = term.tabs + term.col;
2487
2488 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2489 while(--bp > term.tabs && !*bp)
2490 /* nothing */ ;
2491 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2492 *bp = 1;
2493 }
2494 /* update terminal size */
2495 term.col = col;
2496 term.row = row;
2497 /* reset scrolling region */
2498 tsetscroll(0, row-1);
2499 /* make use of the LIMIT in tmoveto */
2500 tmoveto(term.c.x, term.c.y);
2501 /* Clearing both screens */
2502 orig = term.line;
2503 do {
2504 if(mincol < col && 0 < minrow) {
2505 tclearregion(mincol, 0, col - 1, minrow - 1);
2506 }
2507 if(0 < col && minrow < row) {
2508 tclearregion(0, minrow, col - 1, row - 1);
2509 }
2510 tswapscreen();
2511 } while(orig != term.line);
2512
2513 return (slide > 0);
2514 }
2515
2516 void
2517 xresize(int col, int row) {
2518 xw.tw = MAX(1, col * xw.cw);
2519 xw.th = MAX(1, row * xw.ch);
2520
2521 XFreePixmap(xw.dpy, xw.buf);
2522 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2523 DefaultDepth(xw.dpy, xw.scr));
2524 XftDrawChange(xw.draw, xw.buf);
2525 xclear(0, 0, xw.w, xw.h);
2526 }
2527
2528 static inline ushort
2529 sixd_to_16bit(int x) {
2530 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2531 }
2532
2533 void
2534 xloadcols(void) {
2535 int i, r, g, b;
2536 XRenderColor color = { .alpha = 0xffff };
2537
2538 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
2539 for(i = 0; i < LEN(colorname); i++) {
2540 if(!colorname[i])
2541 continue;
2542 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2543 die("Could not allocate color '%s'\n", colorname[i]);
2544 }
2545 }
2546
2547 /* load colors [16-255] ; same colors as xterm */
2548 for(i = 16, r = 0; r < 6; r++) {
2549 for(g = 0; g < 6; g++) {
2550 for(b = 0; b < 6; b++) {
2551 color.red = sixd_to_16bit(r);
2552 color.green = sixd_to_16bit(g);
2553 color.blue = sixd_to_16bit(b);
2554 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i])) {
2555 die("Could not allocate color %d\n", i);
2556 }
2557 i++;
2558 }
2559 }
2560 }
2561
2562 for(r = 0; r < 24; r++, i++) {
2563 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
2564 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color,
2565 &dc.col[i])) {
2566 die("Could not allocate color %d\n", i);
2567 }
2568 }
2569 }
2570
2571 int
2572 xsetcolorname(int x, const char *name) {
2573 XRenderColor color = { .alpha = 0xffff };
2574 Colour colour;
2575 if (x < 0 || x > LEN(colorname))
2576 return -1;
2577 if(!name) {
2578 if(16 <= x && x < 16 + 216) {
2579 int r = (x - 16) / 36, g = ((x - 16) % 36) / 6, b = (x - 16) % 6;
2580 color.red = sixd_to_16bit(r);
2581 color.green = sixd_to_16bit(g);
2582 color.blue = sixd_to_16bit(b);
2583 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2584 return 0; /* something went wrong */
2585 dc.col[x] = colour;
2586 return 1;
2587 } else if (16 + 216 <= x && x < 256) {
2588 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (x - (16 + 216));
2589 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2590 return 0; /* something went wrong */
2591 dc.col[x] = colour;
2592 return 1;
2593 } else {
2594 name = colorname[x];
2595 }
2596 }
2597 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &colour))
2598 return 0;
2599 dc.col[x] = colour;
2600 return 1;
2601 }
2602
2603 void
2604 xtermclear(int col1, int row1, int col2, int row2) {
2605 XftDrawRect(xw.draw,
2606 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2607 borderpx + col1 * xw.cw,
2608 borderpx + row1 * xw.ch,
2609 (col2-col1+1) * xw.cw,
2610 (row2-row1+1) * xw.ch);
2611 }
2612
2613 /*
2614 * Absolute coordinates.
2615 */
2616 void
2617 xclear(int x1, int y1, int x2, int y2) {
2618 XftDrawRect(xw.draw,
2619 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2620 x1, y1, x2-x1, y2-y1);
2621 }
2622
2623 void
2624 xhints(void) {
2625 XClassHint class = {opt_class ? opt_class : termname, termname};
2626 XWMHints wm = {.flags = InputHint, .input = 1};
2627 XSizeHints *sizeh = NULL;
2628
2629 sizeh = XAllocSizeHints();
2630 if(xw.isfixed == False) {
2631 sizeh->flags = PSize | PResizeInc | PBaseSize;
2632 sizeh->height = xw.h;
2633 sizeh->width = xw.w;
2634 sizeh->height_inc = xw.ch;
2635 sizeh->width_inc = xw.cw;
2636 sizeh->base_height = 2 * borderpx;
2637 sizeh->base_width = 2 * borderpx;
2638 } else {
2639 sizeh->flags = PMaxSize | PMinSize;
2640 sizeh->min_width = sizeh->max_width = xw.fw;
2641 sizeh->min_height = sizeh->max_height = xw.fh;
2642 }
2643
2644 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
2645 XFree(sizeh);
2646 }
2647
2648 int
2649 xloadfont(Font *f, FcPattern *pattern) {
2650 FcPattern *match;
2651 FcResult result;
2652
2653 match = FcFontMatch(NULL, pattern, &result);
2654 if(!match)
2655 return 1;
2656
2657 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2658 FcPatternDestroy(match);
2659 return 1;
2660 }
2661
2662 f->set = NULL;
2663 f->pattern = FcPatternDuplicate(pattern);
2664
2665 f->ascent = f->match->ascent;
2666 f->descent = f->match->descent;
2667 f->lbearing = 0;
2668 f->rbearing = f->match->max_advance_width;
2669
2670 f->height = f->ascent + f->descent;
2671 f->width = f->lbearing + f->rbearing;
2672
2673 return 0;
2674 }
2675
2676 void
2677 xloadfonts(char *fontstr, int fontsize) {
2678 FcPattern *pattern;
2679 FcResult result;
2680 double fontval;
2681
2682 if(fontstr[0] == '-') {
2683 pattern = XftXlfdParse(fontstr, False, False);
2684 } else {
2685 pattern = FcNameParse((FcChar8 *)fontstr);
2686 }
2687
2688 if(!pattern)
2689 die("st: can't open font %s\n", fontstr);
2690
2691 if(fontsize > 0) {
2692 FcPatternDel(pattern, FC_PIXEL_SIZE);
2693 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2694 usedfontsize = fontsize;
2695 } else {
2696 result = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2697 if(result == FcResultMatch) {
2698 usedfontsize = (int)fontval;
2699 } else {
2700 /*
2701 * Default font size is 12, if none given. This is to
2702 * have a known usedfontsize value.
2703 */
2704 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
2705 usedfontsize = 12;
2706 }
2707 }
2708
2709 FcConfigSubstitute(0, pattern, FcMatchPattern);
2710 FcDefaultSubstitute(pattern);
2711
2712 if(xloadfont(&dc.font, pattern))
2713 die("st: can't open font %s\n", fontstr);
2714
2715 /* Setting character width and height. */
2716 xw.cw = dc.font.width;
2717 xw.ch = dc.font.height;
2718
2719 FcPatternDel(pattern, FC_SLANT);
2720 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
2721 if(xloadfont(&dc.ifont, pattern))
2722 die("st: can't open font %s\n", fontstr);
2723
2724 FcPatternDel(pattern, FC_WEIGHT);
2725 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
2726 if(xloadfont(&dc.ibfont, pattern))
2727 die("st: can't open font %s\n", fontstr);
2728
2729 FcPatternDel(pattern, FC_SLANT);
2730 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
2731 if(xloadfont(&dc.bfont, pattern))
2732 die("st: can't open font %s\n", fontstr);
2733
2734 FcPatternDestroy(pattern);
2735 }
2736
2737 int
2738 xloadfontset(Font *f) {
2739 FcResult result;
2740
2741 if(!(f->set = FcFontSort(0, f->pattern, FcTrue, 0, &result)))
2742 return 1;
2743 return 0;
2744 }
2745
2746 void
2747 xunloadfont(Font *f) {
2748 XftFontClose(xw.dpy, f->match);
2749 FcPatternDestroy(f->pattern);
2750 if(f->set)
2751 FcFontSetDestroy(f->set);
2752 }
2753
2754 void
2755 xunloadfonts(void) {
2756 int i, ip;
2757
2758 /*
2759 * Free the loaded fonts in the font cache. This is done backwards
2760 * from the frccur.
2761 */
2762 for(i = 0, ip = frccur; i < frclen; i++, ip--) {
2763 if(ip < 0)
2764 ip = LEN(frc) - 1;
2765 XftFontClose(xw.dpy, frc[ip].font);
2766 }
2767 frccur = -1;
2768 frclen = 0;
2769
2770 xunloadfont(&dc.font);
2771 xunloadfont(&dc.bfont);
2772 xunloadfont(&dc.ifont);
2773 xunloadfont(&dc.ibfont);
2774 }
2775
2776 void
2777 xzoom(const Arg *arg) {
2778 xunloadfonts();
2779 xloadfonts(usedfont, usedfontsize + arg->i);
2780 cresize(0, 0);
2781 redraw(0);
2782 }
2783
2784 void
2785 xinit(void) {
2786 XSetWindowAttributes attrs;
2787 XGCValues gcvalues;
2788 Cursor cursor;
2789 Window parent;
2790 int sw, sh;
2791
2792 if(!(xw.dpy = XOpenDisplay(NULL)))
2793 die("Can't open display\n");
2794 xw.scr = XDefaultScreen(xw.dpy);
2795 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
2796
2797 /* font */
2798 if(!FcInit())
2799 die("Could not init fontconfig.\n");
2800
2801 usedfont = (opt_font == NULL)? font : opt_font;
2802 xloadfonts(usedfont, 0);
2803
2804 /* colors */
2805 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
2806 xloadcols();
2807
2808 /* adjust fixed window geometry */
2809 if(xw.isfixed) {
2810 sw = DisplayWidth(xw.dpy, xw.scr);
2811 sh = DisplayHeight(xw.dpy, xw.scr);
2812 if(xw.fx < 0)
2813 xw.fx = sw + xw.fx - xw.fw - 1;
2814 if(xw.fy < 0)
2815 xw.fy = sh + xw.fy - xw.fh - 1;
2816
2817 xw.h = xw.fh;
2818 xw.w = xw.fw;
2819 } else {
2820 /* window - default size */
2821 xw.h = 2 * borderpx + term.row * xw.ch;
2822 xw.w = 2 * borderpx + term.col * xw.cw;
2823 xw.fx = 0;
2824 xw.fy = 0;
2825 }
2826
2827 /* Events */
2828 attrs.background_pixel = dc.col[defaultbg].pixel;
2829 attrs.border_pixel = dc.col[defaultbg].pixel;
2830 attrs.bit_gravity = NorthWestGravity;
2831 attrs.event_mask = FocusChangeMask | KeyPressMask
2832 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
2833 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
2834 attrs.colormap = xw.cmap;
2835
2836 parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
2837 XRootWindow(xw.dpy, xw.scr);
2838 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
2839 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
2840 xw.vis,
2841 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
2842 | CWColormap,
2843 &attrs);
2844
2845 memset(&gcvalues, 0, sizeof(gcvalues));
2846 gcvalues.graphics_exposures = False;
2847 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
2848 &gcvalues);
2849 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2850 DefaultDepth(xw.dpy, xw.scr));
2851 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
2852 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
2853
2854 /* Xft rendering context */
2855 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
2856
2857 /* input methods */
2858 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2859 XSetLocaleModifiers("@im=local");
2860 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2861 XSetLocaleModifiers("@im=");
2862 if((xw.xim = XOpenIM(xw.dpy,
2863 NULL, NULL, NULL)) == NULL) {
2864 die("XOpenIM failed. Could not open input"
2865 " device.\n");
2866 }
2867 }
2868 }
2869 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
2870 | XIMStatusNothing, XNClientWindow, xw.win,
2871 XNFocusWindow, xw.win, NULL);
2872 if(xw.xic == NULL)
2873 die("XCreateIC failed. Could not obtain input method.\n");
2874
2875 /* white cursor, black outline */
2876 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
2877 XDefineCursor(xw.dpy, xw.win, cursor);
2878 XRecolorCursor(xw.dpy, cursor,
2879 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
2880 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
2881
2882 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
2883 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
2884 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
2885
2886 xresettitle();
2887 XMapWindow(xw.dpy, xw.win);
2888 xhints();
2889 XSync(xw.dpy, 0);
2890 }
2891
2892 void
2893 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
2894 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
2895 width = charlen * xw.cw, xp, i;
2896 int frp, frcflags;
2897 int u8fl, u8fblen, u8cblen, doesexist;
2898 char *u8c, *u8fs;
2899 long u8char;
2900 Font *font = &dc.font;
2901 FcResult fcres;
2902 FcPattern *fcpattern, *fontpattern;
2903 FcFontSet *fcsets[] = { NULL };
2904 FcCharSet *fccharset;
2905 Colour *fg, *bg, *temp, revfg, revbg;
2906 XRenderColor colfg, colbg;
2907 Rectangle r;
2908
2909 frcflags = FRC_NORMAL;
2910
2911 if(base.mode & ATTR_ITALIC) {
2912 if(base.fg == defaultfg)
2913 base.fg = defaultitalic;
2914 font = &dc.ifont;
2915 frcflags = FRC_ITALIC;
2916 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
2917 if(base.fg == defaultfg)
2918 base.fg = defaultitalic;
2919 font = &dc.ibfont;
2920 frcflags = FRC_ITALICBOLD;
2921 } else if(base.mode & ATTR_UNDERLINE) {
2922 if(base.fg == defaultfg)
2923 base.fg = defaultunderline;
2924 }
2925 fg = &dc.col[base.fg];
2926 bg = &dc.col[base.bg];
2927
2928 if(base.mode & ATTR_BOLD) {
2929 if(BETWEEN(base.fg, 0, 7)) {
2930 /* basic system colors */
2931 fg = &dc.col[base.fg + 8];
2932 } else if(BETWEEN(base.fg, 16, 195)) {
2933 /* 256 colors */
2934 fg = &dc.col[base.fg + 36];
2935 } else if(BETWEEN(base.fg, 232, 251)) {
2936 /* greyscale */
2937 fg = &dc.col[base.fg + 4];
2938 }
2939 /*
2940 * Those ranges will not be brightened:
2941 * 8 - 15 – bright system colors
2942 * 196 - 231 – highest 256 color cube
2943 * 252 - 255 – brightest colors in greyscale
2944 */
2945 font = &dc.bfont;
2946 frcflags = FRC_BOLD;
2947 }
2948
2949 if(IS_SET(MODE_REVERSE)) {
2950 if(fg == &dc.col[defaultfg]) {
2951 fg = &dc.col[defaultbg];
2952 } else {
2953 colfg.red = ~fg->color.red;
2954 colfg.green = ~fg->color.green;
2955 colfg.blue = ~fg->color.blue;
2956 colfg.alpha = fg->color.alpha;
2957 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
2958 fg = &revfg;
2959 }
2960
2961 if(bg == &dc.col[defaultbg]) {
2962 bg = &dc.col[defaultfg];
2963 } else {
2964 colbg.red = ~bg->color.red;
2965 colbg.green = ~bg->color.green;
2966 colbg.blue = ~bg->color.blue;
2967 colbg.alpha = bg->color.alpha;
2968 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &revbg);
2969 bg = &revbg;
2970 }
2971 }
2972
2973 if(base.mode & ATTR_REVERSE) {
2974 temp = fg;
2975 fg = bg;
2976 bg = temp;
2977 }
2978
2979 if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
2980 fg = bg;
2981
2982 /* Intelligent cleaning up of the borders. */
2983 if(x == 0) {
2984 xclear(0, (y == 0)? 0 : winy, borderpx,
2985 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
2986 }
2987 if(x + charlen >= term.col) {
2988 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
2989 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
2990 }
2991 if(y == 0)
2992 xclear(winx, 0, winx + width, borderpx);
2993 if(y == term.row-1)
2994 xclear(winx, winy + xw.ch, winx + width, xw.h);
2995
2996 /* Clean up the region we want to draw to. */
2997 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
2998
2999 /* Set the clip region because Xft is sometimes dirty. */
3000 r.x = 0;
3001 r.y = 0;
3002 r.height = xw.ch;
3003 r.width = width;
3004 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
3005
3006 for(xp = winx; bytelen > 0;) {
3007 /*
3008 * Search for the range in the to be printed string of glyphs
3009 * that are in the main font. Then print that range. If
3010 * some glyph is found that is not in the font, do the
3011 * fallback dance.
3012 */
3013 u8fs = s;
3014 u8fblen = 0;
3015 u8fl = 0;
3016 for(;;) {
3017 u8c = s;
3018 u8cblen = utf8decode(s, &u8char);
3019 s += u8cblen;
3020 bytelen -= u8cblen;
3021
3022 doesexist = XftCharIndex(xw.dpy, font->match, u8char);
3023 if(!doesexist || bytelen <= 0) {
3024 if(bytelen <= 0) {
3025 if(doesexist) {
3026 u8fl++;
3027 u8fblen += u8cblen;
3028 }
3029 }
3030
3031 if(u8fl > 0) {
3032 XftDrawStringUtf8(xw.draw, fg,
3033 font->match, xp,
3034 winy + font->ascent,
3035 (FcChar8 *)u8fs,
3036 u8fblen);
3037 xp += font->width * u8fl;
3038
3039 }
3040 break;
3041 }
3042
3043 u8fl++;
3044 u8fblen += u8cblen;
3045 }
3046 if(doesexist)
3047 break;
3048
3049 frp = frccur;
3050 /* Search the font cache. */
3051 for(i = 0; i < frclen; i++, frp--) {
3052 if(frp <= 0)
3053 frp = LEN(frc) - 1;
3054
3055 if(frc[frp].c == u8char
3056 && frc[frp].flags == frcflags) {
3057 break;
3058 }
3059 }
3060
3061 /* Nothing was found. */
3062 if(i >= frclen) {
3063 if(!font->set)
3064 xloadfontset(font);
3065 fcsets[0] = font->set;
3066
3067 /*
3068 * Nothing was found in the cache. Now use
3069 * some dozen of Fontconfig calls to get the
3070 * font for one single character.
3071 */
3072 fcpattern = FcPatternDuplicate(font->pattern);
3073 fccharset = FcCharSetCreate();
3074
3075 FcCharSetAddChar(fccharset, u8char);
3076 FcPatternAddCharSet(fcpattern, FC_CHARSET,
3077 fccharset);
3078 FcPatternAddBool(fcpattern, FC_SCALABLE,
3079 FcTrue);
3080
3081 FcConfigSubstitute(0, fcpattern,
3082 FcMatchPattern);
3083 FcDefaultSubstitute(fcpattern);
3084
3085 fontpattern = FcFontSetMatch(0, fcsets,
3086 FcTrue, fcpattern, &fcres);
3087
3088 /*
3089 * Overwrite or create the new cache entry.
3090 */
3091 frccur++;
3092 frclen++;
3093 if(frccur >= LEN(frc))
3094 frccur = 0;
3095 if(frclen > LEN(frc)) {
3096 frclen = LEN(frc);
3097 XftFontClose(xw.dpy, frc[frccur].font);
3098 }
3099
3100 frc[frccur].font = XftFontOpenPattern(xw.dpy,
3101 fontpattern);
3102 frc[frccur].c = u8char;
3103 frc[frccur].flags = frcflags;
3104
3105 FcPatternDestroy(fcpattern);
3106 FcCharSetDestroy(fccharset);
3107
3108 frp = frccur;
3109 }
3110
3111 XftDrawStringUtf8(xw.draw, fg, frc[frp].font,
3112 xp, winy + frc[frp].font->ascent,
3113 (FcChar8 *)u8c, u8cblen);
3114
3115 xp += font->width;
3116 }
3117
3118 /*
3119 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
3120 winy + font->ascent, (FcChar8 *)s, bytelen);
3121 */
3122
3123 if(base.mode & ATTR_UNDERLINE) {
3124 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
3125 width, 1);
3126 }
3127
3128 /* Reset clip to none. */
3129 XftDrawSetClip(xw.draw, 0);
3130 }
3131
3132 void
3133 xdrawcursor(void) {
3134 static int oldx = 0, oldy = 0;
3135 int sl;
3136 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
3137
3138 LIMIT(oldx, 0, term.col-1);
3139 LIMIT(oldy, 0, term.row-1);
3140
3141 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
3142
3143 /* remove the old cursor */
3144 sl = utf8size(term.line[oldy][oldx].c);
3145 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
3146 oldy, 1, sl);
3147
3148 /* draw the new one */
3149 if(!(IS_SET(MODE_HIDE))) {
3150 if(xw.state & WIN_FOCUSED) {
3151 if(IS_SET(MODE_REVERSE)) {
3152 g.mode |= ATTR_REVERSE;
3153 g.fg = defaultcs;
3154 g.bg = defaultfg;
3155 }
3156
3157 sl = utf8size(g.c);
3158 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
3159 } else {
3160 XftDrawRect(xw.draw, &dc.col[defaultcs],
3161 borderpx + term.c.x * xw.cw,
3162 borderpx + term.c.y * xw.ch,
3163 xw.cw - 1, 1);
3164 XftDrawRect(xw.draw, &dc.col[defaultcs],
3165 borderpx + term.c.x * xw.cw,
3166 borderpx + term.c.y * xw.ch,
3167 1, xw.ch - 1);
3168 XftDrawRect(xw.draw, &dc.col[defaultcs],
3169 borderpx + (term.c.x + 1) * xw.cw - 1,
3170 borderpx + term.c.y * xw.ch,
3171 1, xw.ch - 1);
3172 XftDrawRect(xw.draw, &dc.col[defaultcs],
3173 borderpx + term.c.x * xw.cw,
3174 borderpx + (term.c.y + 1) * xw.ch - 1,
3175 xw.cw, 1);
3176 }
3177 oldx = term.c.x, oldy = term.c.y;
3178 }
3179 }
3180
3181
3182 void
3183 xsettitle(char *p) {
3184 XTextProperty prop;
3185
3186 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3187 &prop);
3188 XSetWMName(xw.dpy, xw.win, &prop);
3189 }
3190
3191 void
3192 xresettitle(void) {
3193 xsettitle(opt_title ? opt_title : "st");
3194 }
3195
3196 void
3197 redraw(int timeout) {
3198 struct timespec tv = {0, timeout * 1000};
3199
3200 tfulldirt();
3201 draw();
3202
3203 if(timeout > 0) {
3204 nanosleep(&tv, NULL);
3205 XSync(xw.dpy, False); /* necessary for a good tput flash */
3206 }
3207 }
3208
3209 void
3210 draw(void) {
3211 drawregion(0, 0, term.col, term.row);
3212 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3213 xw.h, 0, 0);
3214 XSetForeground(xw.dpy, dc.gc,
3215 dc.col[IS_SET(MODE_REVERSE)?
3216 defaultfg : defaultbg].pixel);
3217 }
3218
3219 void
3220 drawregion(int x1, int y1, int x2, int y2) {
3221 int ic, ib, x, y, ox, sl;
3222 Glyph base, new;
3223 char buf[DRAW_BUF_SIZ];
3224 bool ena_sel = sel.ob.x != -1;
3225
3226 if(sel.alt ^ IS_SET(MODE_ALTSCREEN))
3227 ena_sel = 0;
3228
3229 if(!(xw.state & WIN_VISIBLE))
3230 return;
3231
3232 for(y = y1; y < y2; y++) {
3233 if(!term.dirty[y])
3234 continue;
3235
3236 xtermclear(0, y, term.col, y);
3237 term.dirty[y] = 0;
3238 base = term.line[y][0];
3239 ic = ib = ox = 0;
3240 for(x = x1; x < x2; x++) {
3241 new = term.line[y][x];
3242 if(ena_sel && selected(x, y))
3243 new.mode ^= ATTR_REVERSE;
3244 if(ib > 0 && (ATTRCMP(base, new)
3245 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3246 xdraws(buf, base, ox, y, ic, ib);
3247 ic = ib = 0;
3248 }
3249 if(ib == 0) {
3250 ox = x;
3251 base = new;
3252 }
3253
3254 sl = utf8size(new.c);
3255 memcpy(buf+ib, new.c, sl);
3256 ib += sl;
3257 ++ic;
3258 }
3259 if(ib > 0)
3260 xdraws(buf, base, ox, y, ic, ib);
3261 }
3262 xdrawcursor();
3263 }
3264
3265 void
3266 expose(XEvent *ev) {
3267 XExposeEvent *e = &ev->xexpose;
3268
3269 if(xw.state & WIN_REDRAW) {
3270 if(!e->count)
3271 xw.state &= ~WIN_REDRAW;
3272 }
3273 redraw(0);
3274 }
3275
3276 void
3277 visibility(XEvent *ev) {
3278 XVisibilityEvent *e = &ev->xvisibility;
3279
3280 if(e->state == VisibilityFullyObscured) {
3281 xw.state &= ~WIN_VISIBLE;
3282 } else if(!(xw.state & WIN_VISIBLE)) {
3283 /* need a full redraw for next Expose, not just a buf copy */
3284 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3285 }
3286 }
3287
3288 void
3289 unmap(XEvent *ev) {
3290 xw.state &= ~WIN_VISIBLE;
3291 }
3292
3293 void
3294 xseturgency(int add) {
3295 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3296
3297 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
3298 XSetWMHints(xw.dpy, xw.win, h);
3299 XFree(h);
3300 }
3301
3302 void
3303 focus(XEvent *ev) {
3304 XFocusChangeEvent *e = &ev->xfocus;
3305
3306 if(e->mode == NotifyGrab)
3307 return;
3308
3309 if(ev->type == FocusIn) {
3310 XSetICFocus(xw.xic);
3311 xw.state |= WIN_FOCUSED;
3312 xseturgency(0);
3313 } else {
3314 XUnsetICFocus(xw.xic);
3315 xw.state &= ~WIN_FOCUSED;
3316 }
3317 }
3318
3319 inline bool
3320 match(uint mask, uint state) {
3321 state &= ~(ignoremod);
3322
3323 if(mask == XK_NO_MOD && state)
3324 return false;
3325 if(mask != XK_ANY_MOD && mask != XK_NO_MOD && !state)
3326 return false;
3327 if((state & mask) != state)
3328 return false;
3329 return true;
3330 }
3331
3332 void
3333 numlock(const Arg *dummy) {
3334 term.numlock ^= 1;
3335 }
3336
3337 char*
3338 kmap(KeySym k, uint state) {
3339 uint mask;
3340 Key *kp;
3341 int i;
3342
3343 /* Check for mapped keys out of X11 function keys. */
3344 for(i = 0; i < LEN(mappedkeys); i++) {
3345 if(mappedkeys[i] == k)
3346 break;
3347 }
3348 if(i == LEN(mappedkeys)) {
3349 if((k & 0xFFFF) < 0xFD00)
3350 return NULL;
3351 }
3352
3353 for(kp = key; kp < key + LEN(key); kp++) {
3354 mask = kp->mask;
3355
3356 if(kp->k != k)
3357 continue;
3358
3359 if(!match(mask, state))
3360 continue;
3361
3362 if(kp->appkey > 0) {
3363 if(!IS_SET(MODE_APPKEYPAD))
3364 continue;
3365 if(term.numlock && kp->appkey == 2)
3366 continue;
3367 } else if(kp->appkey < 0 && IS_SET(MODE_APPKEYPAD)) {
3368 continue;
3369 }
3370
3371 if((kp->appcursor < 0 && IS_SET(MODE_APPCURSOR)) ||
3372 (kp->appcursor > 0
3373 && !IS_SET(MODE_APPCURSOR))) {
3374 continue;
3375 }
3376
3377 if((kp->crlf < 0 && IS_SET(MODE_CRLF)) ||
3378 (kp->crlf > 0 && !IS_SET(MODE_CRLF))) {
3379 continue;
3380 }
3381
3382 return kp->s;
3383 }
3384
3385 return NULL;
3386 }
3387
3388 void
3389 kpress(XEvent *ev) {
3390 XKeyEvent *e = &ev->xkey;
3391 KeySym ksym;
3392 char xstr[31], buf[32], *customkey, *cp = buf;
3393 int len, ret;
3394 long c;
3395 Status status;
3396 Shortcut *bp;
3397
3398 if(IS_SET(MODE_KBDLOCK))
3399 return;
3400
3401 len = XmbLookupString(xw.xic, e, xstr, sizeof(xstr), &ksym, &status);
3402 e->state &= ~Mod2Mask;
3403 /* 1. shortcuts */
3404 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3405 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3406 bp->func(&(bp->arg));
3407 return;
3408 }
3409 }
3410
3411 /* 2. custom keys from config.h */
3412 if((customkey = kmap(ksym, e->state))) {
3413 len = strlen(customkey);
3414 memcpy(buf, customkey, len);
3415 /* 3. hardcoded (overrides X lookup) */
3416 } else {
3417 if(len == 0)
3418 return;
3419
3420 if(len == 1 && e->state & Mod1Mask) {
3421 if(IS_SET(MODE_8BIT)) {
3422 if(*xstr < 0177) {
3423 c = *xstr | B7;
3424 ret = utf8encode(&c, cp);
3425 cp += ret;
3426 len = 0;
3427 }
3428 } else {
3429 *cp++ = '\033';
3430 }
3431 }
3432
3433 memcpy(cp, xstr, len);
3434 len = cp - buf + len;
3435 }
3436
3437 ttywrite(buf, len);
3438 if(IS_SET(MODE_ECHO))
3439 techo(buf, len);
3440 }
3441
3442
3443 void
3444 cmessage(XEvent *e) {
3445 /*
3446 * See xembed specs
3447 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3448 */
3449 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3450 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3451 xw.state |= WIN_FOCUSED;
3452 xseturgency(0);
3453 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3454 xw.state &= ~WIN_FOCUSED;
3455 }
3456 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3457 /* Send SIGHUP to shell */
3458 kill(pid, SIGHUP);
3459 exit(EXIT_SUCCESS);
3460 }
3461 }
3462
3463 void
3464 cresize(int width, int height) {
3465 int col, row;
3466
3467 if(width != 0)
3468 xw.w = width;
3469 if(height != 0)
3470 xw.h = height;
3471
3472 col = (xw.w - 2 * borderpx) / xw.cw;
3473 row = (xw.h - 2 * borderpx) / xw.ch;
3474
3475 tresize(col, row);
3476 xresize(col, row);
3477 ttyresize();
3478 }
3479
3480 void
3481 resize(XEvent *e) {
3482 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3483 return;
3484
3485 cresize(e->xconfigure.width, e->xconfigure.height);
3486 }
3487
3488 void
3489 run(void) {
3490 XEvent ev;
3491 fd_set rfd;
3492 int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3493 struct timeval drawtimeout, *tv = NULL, now, last, lastblink;
3494
3495 gettimeofday(&lastblink, NULL);
3496 gettimeofday(&last, NULL);
3497
3498 for(xev = actionfps;;) {
3499 FD_ZERO(&rfd);
3500 FD_SET(cmdfd, &rfd);
3501 FD_SET(xfd, &rfd);
3502
3503 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
3504 if(errno == EINTR)
3505 continue;
3506 die("select failed: %s\n", SERRNO);
3507 }
3508 if(FD_ISSET(cmdfd, &rfd)) {
3509 ttyread();
3510 if(blinktimeout) {
3511 blinkset = tattrset(ATTR_BLINK);
3512 if(!blinkset && term.mode & ATTR_BLINK)
3513 term.mode &= ~(MODE_BLINK);
3514 }
3515 }
3516
3517 if(FD_ISSET(xfd, &rfd))
3518 xev = actionfps;
3519
3520 gettimeofday(&now, NULL);
3521 drawtimeout.tv_sec = 0;
3522 drawtimeout.tv_usec = (1000/xfps) * 1000;
3523 tv = &drawtimeout;
3524
3525 dodraw = 0;
3526 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
3527 tsetdirtattr(ATTR_BLINK);
3528 term.mode ^= MODE_BLINK;
3529 gettimeofday(&lastblink, NULL);
3530 dodraw = 1;
3531 }
3532 if(TIMEDIFF(now, last) \
3533 > (xev? (1000/xfps) : (1000/actionfps))) {
3534 dodraw = 1;
3535 last = now;
3536 }
3537
3538 if(dodraw) {
3539 while(XPending(xw.dpy)) {
3540 XNextEvent(xw.dpy, &ev);
3541 if(XFilterEvent(&ev, None))
3542 continue;
3543 if(handler[ev.type])
3544 (handler[ev.type])(&ev);
3545 }
3546
3547 draw();
3548 XFlush(xw.dpy);
3549
3550 if(xev && !FD_ISSET(xfd, &rfd))
3551 xev--;
3552 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
3553 if(blinkset) {
3554 if(TIMEDIFF(now, lastblink) \
3555 > blinktimeout) {
3556 drawtimeout.tv_usec = 1;
3557 } else {
3558 drawtimeout.tv_usec = (1000 * \
3559 (blinktimeout - \
3560 TIMEDIFF(now,
3561 lastblink)));
3562 }
3563 } else {
3564 tv = NULL;
3565 }
3566 }
3567 }
3568 }
3569 }
3570
3571 void
3572 usage(void) {
3573 die("%s " VERSION " (c) 2010-2013 st engineers\n" \
3574 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]" \
3575 " [-t title] [-w windowid] [-e command ...]\n", argv0);
3576 }
3577
3578 int
3579 main(int argc, char *argv[]) {
3580 int bitm, xr, yr;
3581 uint wr, hr;
3582
3583 xw.fw = xw.fh = xw.fx = xw.fy = 0;
3584 xw.isfixed = False;
3585
3586 ARGBEGIN {
3587 case 'a':
3588 allowaltscreen = false;
3589 break;
3590 case 'c':
3591 opt_class = EARGF(usage());
3592 break;
3593 case 'e':
3594 /* eat all remaining arguments */
3595 if(argc > 1)
3596 opt_cmd = &argv[1];
3597 goto run;
3598 case 'f':
3599 opt_font = EARGF(usage());
3600 break;
3601 case 'g':
3602 bitm = XParseGeometry(EARGF(usage()), &xr, &yr, &wr, &hr);
3603 if(bitm & XValue)
3604 xw.fx = xr;
3605 if(bitm & YValue)
3606 xw.fy = yr;
3607 if(bitm & WidthValue)
3608 xw.fw = (int)wr;
3609 if(bitm & HeightValue)
3610 xw.fh = (int)hr;
3611 if(bitm & XNegative && xw.fx == 0)
3612 xw.fx = -1;
3613 if(bitm & XNegative && xw.fy == 0)
3614 xw.fy = -1;
3615
3616 if(xw.fh != 0 && xw.fw != 0)
3617 xw.isfixed = True;
3618 break;
3619 case 'o':
3620 opt_io = EARGF(usage());
3621 break;
3622 case 't':
3623 opt_title = EARGF(usage());
3624 break;
3625 case 'w':
3626 opt_embed = EARGF(usage());
3627 break;
3628 case 'v':
3629 default:
3630 usage();
3631 } ARGEND;
3632
3633 run:
3634 setlocale(LC_CTYPE, "");
3635 XSetLocaleModifiers("");
3636 tnew(80, 24);
3637 xinit();
3638 ttynew();
3639 selinit();
3640 if(xw.isfixed)
3641 cresize(xw.h, xw.w);
3642 run();
3643
3644 return 0;
3645 }
3646