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Removing dbe and introducing umlauts to titles.
[st.git] / st.c
1 /* See LICENSE for licence details. */
2 #define _XOPEN_SOURCE 600
3 #include <ctype.h>
4 #include <errno.h>
5 #include <fcntl.h>
6 #include <limits.h>
7 #include <locale.h>
8 #include <pwd.h>
9 #include <stdarg.h>
10 #include <stdbool.h>
11 #include <stdio.h>
12 #include <stdlib.h>
13 #include <string.h>
14 #include <signal.h>
15 #include <sys/ioctl.h>
16 #include <sys/select.h>
17 #include <sys/stat.h>
18 #include <sys/time.h>
19 #include <sys/types.h>
20 #include <sys/wait.h>
21 #include <time.h>
22 #include <unistd.h>
23 #include <X11/Xatom.h>
24 #include <X11/Xlib.h>
25 #include <X11/Xutil.h>
26 #include <X11/cursorfont.h>
27 #include <X11/keysym.h>
28 #include <X11/Xft/Xft.h>
29 #include <fontconfig/fontconfig.h>
30
31 #define Glyph Glyph_
32 #define Font Font_
33 #define Draw XftDraw *
34 #define Colour XftColor
35 #define Colourmap Colormap
36
37 #if defined(__linux)
38 #include <pty.h>
39 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
40 #include <util.h>
41 #elif defined(__FreeBSD__) || defined(__DragonFly__)
42 #include <libutil.h>
43 #endif
44
45 #define USAGE \
46 "st " VERSION " (c) 2010-2013 st engineers\n" \
47 "usage: st [-v] [-c class] [-f font] [-g geometry] [-o file]" \
48 " [-t title] [-w windowid] [-e command ...]\n"
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 };
90
91 enum cursor_movement {
92 CURSOR_SAVE,
93 CURSOR_LOAD
94 };
95
96 enum cursor_state {
97 CURSOR_DEFAULT = 0,
98 CURSOR_WRAPNEXT = 1,
99 CURSOR_ORIGIN = 2
100 };
101
102 enum glyph_state {
103 GLYPH_SET = 1,
104 GLYPH_DIRTY = 2
105 };
106
107 enum term_mode {
108 MODE_WRAP = 1,
109 MODE_INSERT = 2,
110 MODE_APPKEYPAD = 4,
111 MODE_ALTSCREEN = 8,
112 MODE_CRLF = 16,
113 MODE_MOUSEBTN = 32,
114 MODE_MOUSEMOTION = 64,
115 MODE_MOUSE = 32|64,
116 MODE_REVERSE = 128,
117 MODE_KBDLOCK = 256,
118 MODE_HIDE = 512,
119 MODE_ECHO = 1024,
120 MODE_APPCURSOR = 2048,
121 MODE_MOUSESGR = 4096,
122 };
123
124 enum escape_state {
125 ESC_START = 1,
126 ESC_CSI = 2,
127 ESC_STR = 4, /* DSC, OSC, PM, APC */
128 ESC_ALTCHARSET = 8,
129 ESC_STR_END = 16, /* a final string was encountered */
130 ESC_TEST = 32, /* Enter in test mode */
131 };
132
133 enum window_state {
134 WIN_VISIBLE = 1,
135 WIN_REDRAW = 2,
136 WIN_FOCUSED = 4
137 };
138
139 enum selection_type {
140 SEL_REGULAR = 1,
141 SEL_RECTANGULAR = 2
142 };
143
144 /* bit macro */
145 #undef B0
146 enum { B0=1, B1=2, B2=4, B3=8, B4=16, B5=32, B6=64, B7=128 };
147
148 typedef unsigned char uchar;
149 typedef unsigned int uint;
150 typedef unsigned long ulong;
151 typedef unsigned short ushort;
152
153 typedef struct {
154 char c[UTF_SIZ]; /* character code */
155 uchar mode; /* attribute flags */
156 ushort fg; /* foreground */
157 ushort bg; /* background */
158 uchar state; /* state flags */
159 } Glyph;
160
161 typedef Glyph *Line;
162
163 typedef struct {
164 Glyph attr; /* current char attributes */
165 int x;
166 int y;
167 char state;
168 } TCursor;
169
170 /* CSI Escape sequence structs */
171 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
172 typedef struct {
173 char buf[ESC_BUF_SIZ]; /* raw string */
174 int len; /* raw string length */
175 char priv;
176 int arg[ESC_ARG_SIZ];
177 int narg; /* nb of args */
178 char mode;
179 } CSIEscape;
180
181 /* STR Escape sequence structs */
182 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
183 typedef struct {
184 char type; /* ESC type ... */
185 char buf[STR_BUF_SIZ]; /* raw string */
186 int len; /* raw string length */
187 char *args[STR_ARG_SIZ];
188 int narg; /* nb of args */
189 } STREscape;
190
191 /* Internal representation of the screen */
192 typedef struct {
193 int row; /* nb row */
194 int col; /* nb col */
195 Line *line; /* screen */
196 Line *alt; /* alternate screen */
197 bool *dirty; /* dirtyness of lines */
198 TCursor c; /* cursor */
199 int top; /* top scroll limit */
200 int bot; /* bottom scroll limit */
201 int mode; /* terminal mode flags */
202 int esc; /* escape state flags */
203 bool numlock; /* lock numbers in keyboard */
204 bool *tabs;
205 } Term;
206
207 /* Purely graphic info */
208 typedef struct {
209 Display *dpy;
210 Colourmap cmap;
211 Window win;
212 Drawable buf;
213 Atom xembed, wmdeletewin;
214 XIM xim;
215 XIC xic;
216 Draw draw;
217 Visual *vis;
218 int scr;
219 bool isfixed; /* is fixed geometry? */
220 int fx, fy, fw, fh; /* fixed geometry */
221 int tw, th; /* tty width and height */
222 int w, h; /* window width and height */
223 int ch; /* char height */
224 int cw; /* char width */
225 char state; /* focus, redraw, visible */
226 } XWindow;
227
228 typedef struct {
229 KeySym k;
230 uint mask;
231 char s[ESC_BUF_SIZ];
232 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
233 signed char appkey; /* application keypad */
234 signed char appcursor; /* application cursor */
235 signed char crlf; /* crlf mode */
236 } Key;
237
238 /* TODO: use better name for vars... */
239 typedef struct {
240 int mode;
241 int type;
242 int bx, by;
243 int ex, ey;
244 struct {
245 int x, y;
246 } b, e;
247 char *clip;
248 Atom xtarget;
249 bool alt;
250 struct timeval tclick1;
251 struct timeval tclick2;
252 } Selection;
253
254 typedef union {
255 int i;
256 unsigned int ui;
257 float f;
258 const void *v;
259 } Arg;
260
261 typedef struct {
262 unsigned int mod;
263 KeySym keysym;
264 void (*func)(const Arg *);
265 const Arg arg;
266 } Shortcut;
267
268 /* function definitions used in config.h */
269 static void xzoom(const Arg *);
270 static void selpaste(const Arg *);
271 static void numlock(const Arg *);
272
273 /* Config.h for applying patches and the configuration. */
274 #include "config.h"
275
276 /* Font structure */
277 typedef struct {
278 int height;
279 int width;
280 int ascent;
281 int descent;
282 short lbearing;
283 short rbearing;
284 XftFont *match;
285 FcFontSet *set;
286 FcPattern *pattern;
287 } Font;
288
289 /* Drawing Context */
290 typedef struct {
291 Colour col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
292 Font font, bfont, ifont, ibfont;
293 GC gc;
294 } DC;
295
296 static void die(const char *, ...);
297 static void draw(void);
298 static void redraw(int);
299 static void drawregion(int, int, int, int);
300 static void execsh(void);
301 static void sigchld(int);
302 static void run(void);
303
304 static void csidump(void);
305 static void csihandle(void);
306 static void csiparse(void);
307 static void csireset(void);
308 static void strdump(void);
309 static void strhandle(void);
310 static void strparse(void);
311 static void strreset(void);
312
313 static void tclearregion(int, int, int, int, int);
314 static void tcursor(int);
315 static void tdeletechar(int);
316 static void tdeleteline(int);
317 static void tinsertblank(int);
318 static void tinsertblankline(int);
319 static void tmoveto(int, int);
320 static void tmoveato(int x, int y);
321 static void tnew(int, int);
322 static void tnewline(int);
323 static void tputtab(bool);
324 static void tputc(char *, int);
325 static void treset(void);
326 static int tresize(int, int);
327 static void tscrollup(int, int);
328 static void tscrolldown(int, int);
329 static void tsetattr(int*, int);
330 static void tsetchar(char *, Glyph *, int, int);
331 static void tsetscroll(int, int);
332 static void tswapscreen(void);
333 static void tsetdirt(int, int);
334 static void tsetmode(bool, bool, int *, int);
335 static void tfulldirt(void);
336 static void techo(char *, int);
337
338 static inline bool match(uint, uint);
339 static void ttynew(void);
340 static void ttyread(void);
341 static void ttyresize(void);
342 static void ttywrite(const char *, size_t);
343
344 static void xdraws(char *, Glyph, int, int, int, int);
345 static void xhints(void);
346 static void xclear(int, int, int, int);
347 static void xdrawcursor(void);
348 static void xinit(void);
349 static void xloadcols(void);
350 static int xsetcolorname(int, const char *);
351 static int xloadfont(Font *, FcPattern *);
352 static void xloadfonts(char *, int);
353 static void xsettitle(char *);
354 static void xresettitle(void);
355 static void xseturgency(int);
356 static void xsetsel(char*);
357 static void xtermclear(int, int, int, int);
358 static void xunloadfonts(void);
359 static void xresize(int, int);
360
361 static void expose(XEvent *);
362 static void visibility(XEvent *);
363 static void unmap(XEvent *);
364 static char *kmap(KeySym, uint);
365 static void kpress(XEvent *);
366 static void cmessage(XEvent *);
367 static void cresize(int, int);
368 static void resize(XEvent *);
369 static void focus(XEvent *);
370 static void brelease(XEvent *);
371 static void bpress(XEvent *);
372 static void bmotion(XEvent *);
373 static void selnotify(XEvent *);
374 static void selclear(XEvent *);
375 static void selrequest(XEvent *);
376
377 static void selinit(void);
378 static inline bool selected(int, int);
379 static void selcopy(void);
380 static void selscroll(int, int);
381
382 static int utf8decode(char *, long *);
383 static int utf8encode(long *, char *);
384 static int utf8size(char *);
385 static int isfullutf8(char *, int);
386
387 static ssize_t xwrite(int, char *, size_t);
388 static void *xmalloc(size_t);
389 static void *xrealloc(void *, size_t);
390 static void *xcalloc(size_t, size_t);
391
392 static void (*handler[LASTEvent])(XEvent *) = {
393 [KeyPress] = kpress,
394 [ClientMessage] = cmessage,
395 [ConfigureNotify] = resize,
396 [VisibilityNotify] = visibility,
397 [UnmapNotify] = unmap,
398 [Expose] = expose,
399 [FocusIn] = focus,
400 [FocusOut] = focus,
401 [MotionNotify] = bmotion,
402 [ButtonPress] = bpress,
403 [ButtonRelease] = brelease,
404 [SelectionClear] = selclear,
405 [SelectionNotify] = selnotify,
406 [SelectionRequest] = selrequest,
407 };
408
409 /* Globals */
410 static DC dc;
411 static XWindow xw;
412 static Term term;
413 static CSIEscape csiescseq;
414 static STREscape strescseq;
415 static int cmdfd;
416 static pid_t pid;
417 static Selection sel;
418 static int iofd = -1;
419 static char **opt_cmd = NULL;
420 static char *opt_io = NULL;
421 static char *opt_title = NULL;
422 static char *opt_embed = NULL;
423 static char *opt_class = NULL;
424 static char *opt_font = NULL;
425
426 static char *usedfont = NULL;
427 static int usedfontsize = 0;
428
429 /* Font Ring Cache */
430 enum {
431 FRC_NORMAL,
432 FRC_ITALIC,
433 FRC_BOLD,
434 FRC_ITALICBOLD
435 };
436
437 typedef struct {
438 XftFont *font;
439 long c;
440 int flags;
441 } Fontcache;
442
443 /*
444 * Fontcache is a ring buffer, with frccur as current position and frclen as
445 * the current length of used elements.
446 */
447
448 static Fontcache frc[1024];
449 static int frccur = -1, frclen = 0;
450
451 ssize_t
452 xwrite(int fd, char *s, size_t len) {
453 size_t aux = len;
454
455 while(len > 0) {
456 ssize_t r = write(fd, s, len);
457 if(r < 0)
458 return r;
459 len -= r;
460 s += r;
461 }
462 return aux;
463 }
464
465 void *
466 xmalloc(size_t len) {
467 void *p = malloc(len);
468
469 if(!p)
470 die("Out of memory\n");
471
472 return p;
473 }
474
475 void *
476 xrealloc(void *p, size_t len) {
477 if((p = realloc(p, len)) == NULL)
478 die("Out of memory\n");
479
480 return p;
481 }
482
483 void *
484 xcalloc(size_t nmemb, size_t size) {
485 void *p = calloc(nmemb, size);
486
487 if(!p)
488 die("Out of memory\n");
489
490 return p;
491 }
492
493 int
494 utf8decode(char *s, long *u) {
495 uchar c;
496 int i, n, rtn;
497
498 rtn = 1;
499 c = *s;
500 if(~c & B7) { /* 0xxxxxxx */
501 *u = c;
502 return rtn;
503 } else if((c & (B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */
504 *u = c&(B4|B3|B2|B1|B0);
505 n = 1;
506 } else if((c & (B7|B6|B5|B4)) == (B7|B6|B5)) { /* 1110xxxx */
507 *u = c&(B3|B2|B1|B0);
508 n = 2;
509 } else if((c & (B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) { /* 11110xxx */
510 *u = c & (B2|B1|B0);
511 n = 3;
512 } else {
513 goto invalid;
514 }
515
516 for(i = n, ++s; i > 0; --i, ++rtn, ++s) {
517 c = *s;
518 if((c & (B7|B6)) != B7) /* 10xxxxxx */
519 goto invalid;
520 *u <<= 6;
521 *u |= c & (B5|B4|B3|B2|B1|B0);
522 }
523
524 if((n == 1 && *u < 0x80) ||
525 (n == 2 && *u < 0x800) ||
526 (n == 3 && *u < 0x10000) ||
527 (*u >= 0xD800 && *u <= 0xDFFF)) {
528 goto invalid;
529 }
530
531 return rtn;
532 invalid:
533 *u = 0xFFFD;
534
535 return rtn;
536 }
537
538 int
539 utf8encode(long *u, char *s) {
540 uchar *sp;
541 ulong uc;
542 int i, n;
543
544 sp = (uchar *)s;
545 uc = *u;
546 if(uc < 0x80) {
547 *sp = uc; /* 0xxxxxxx */
548 return 1;
549 } else if(*u < 0x800) {
550 *sp = (uc >> 6) | (B7|B6); /* 110xxxxx */
551 n = 1;
552 } else if(uc < 0x10000) {
553 *sp = (uc >> 12) | (B7|B6|B5); /* 1110xxxx */
554 n = 2;
555 } else if(uc <= 0x10FFFF) {
556 *sp = (uc >> 18) | (B7|B6|B5|B4); /* 11110xxx */
557 n = 3;
558 } else {
559 goto invalid;
560 }
561
562 for(i=n,++sp; i>0; --i,++sp)
563 *sp = ((uc >> 6*(i-1)) & (B5|B4|B3|B2|B1|B0)) | B7; /* 10xxxxxx */
564
565 return n+1;
566 invalid:
567 /* U+FFFD */
568 *s++ = '\xEF';
569 *s++ = '\xBF';
570 *s = '\xBD';
571
572 return 3;
573 }
574
575 /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
576 UTF-8 otherwise return 0 */
577 int
578 isfullutf8(char *s, int b) {
579 uchar *c1, *c2, *c3;
580
581 c1 = (uchar *)s;
582 c2 = (uchar *)++s;
583 c3 = (uchar *)++s;
584 if(b < 1) {
585 return 0;
586 } else if((*c1&(B7|B6|B5)) == (B7|B6) && b == 1) {
587 return 0;
588 } else if((*c1&(B7|B6|B5|B4)) == (B7|B6|B5) &&
589 ((b == 1) ||
590 ((b == 2) && (*c2&(B7|B6)) == B7))) {
591 return 0;
592 } else if((*c1&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4) &&
593 ((b == 1) ||
594 ((b == 2) && (*c2&(B7|B6)) == B7) ||
595 ((b == 3) && (*c2&(B7|B6)) == B7 && (*c3&(B7|B6)) == B7))) {
596 return 0;
597 } else {
598 return 1;
599 }
600 }
601
602 int
603 utf8size(char *s) {
604 uchar c = *s;
605
606 if(~c&B7) {
607 return 1;
608 } else if((c&(B7|B6|B5)) == (B7|B6)) {
609 return 2;
610 } else if((c&(B7|B6|B5|B4)) == (B7|B6|B5)) {
611 return 3;
612 } else {
613 return 4;
614 }
615 }
616
617 void
618 selinit(void) {
619 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
620 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
621 sel.mode = 0;
622 sel.bx = -1;
623 sel.clip = NULL;
624 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
625 if(sel.xtarget == None)
626 sel.xtarget = XA_STRING;
627 }
628
629 static int
630 x2col(int x) {
631 x -= borderpx;
632 x /= xw.cw;
633
634 return LIMIT(x, 0, term.col-1);
635 }
636
637 static int
638 y2row(int y) {
639 y -= borderpx;
640 y /= xw.ch;
641
642 return LIMIT(y, 0, term.row-1);
643 }
644
645 static inline bool
646 selected(int x, int y) {
647 int bx, ex;
648
649 if(sel.ey == y && sel.by == y) {
650 bx = MIN(sel.bx, sel.ex);
651 ex = MAX(sel.bx, sel.ex);
652 return BETWEEN(x, bx, ex);
653 }
654
655 return ((sel.b.y < y && y < sel.e.y)
656 || (y == sel.e.y && x <= sel.e.x))
657 || (y == sel.b.y && x >= sel.b.x
658 && (x <= sel.e.x || sel.b.y != sel.e.y));
659 switch(sel.type) {
660 case SEL_REGULAR:
661 return ((sel.b.y < y && y < sel.e.y)
662 || (y == sel.e.y && x <= sel.e.x))
663 || (y == sel.b.y && x >= sel.b.x
664 && (x <= sel.e.x || sel.b.y != sel.e.y));
665 case SEL_RECTANGULAR:
666 return ((sel.b.y <= y && y <= sel.e.y)
667 && (sel.b.x <= x && x <= sel.e.x));
668 };
669 }
670
671 void
672 getbuttoninfo(XEvent *e) {
673 int type;
674 uint state = e->xbutton.state &~Button1Mask;
675
676 sel.alt = IS_SET(MODE_ALTSCREEN);
677
678 sel.ex = x2col(e->xbutton.x);
679 sel.ey = y2row(e->xbutton.y);
680
681 sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
682 sel.b.y = MIN(sel.by, sel.ey);
683 sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
684 sel.e.y = MAX(sel.by, sel.ey);
685
686 sel.type = SEL_REGULAR;
687 for(type = 1; type < LEN(selmasks); ++type) {
688 if(match(selmasks[type], state)) {
689 sel.type = type;
690 break;
691 }
692 }
693 }
694
695 void
696 mousereport(XEvent *e) {
697 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
698 button = e->xbutton.button, state = e->xbutton.state,
699 len;
700 char buf[40];
701 static int ob, ox, oy;
702
703 /* from urxvt */
704 if(e->xbutton.type == MotionNotify) {
705 if(!IS_SET(MODE_MOUSEMOTION) || (x == ox && y == oy))
706 return;
707 button = ob + 32;
708 ox = x, oy = y;
709 } else if(!IS_SET(MODE_MOUSESGR)
710 && (e->xbutton.type == ButtonRelease
711 || button == AnyButton)) {
712 button = 3;
713 } else {
714 button -= Button1;
715 if(button >= 3)
716 button += 64 - 3;
717 if(e->xbutton.type == ButtonPress) {
718 ob = button;
719 ox = x, oy = y;
720 }
721 }
722
723 button += (state & ShiftMask ? 4 : 0)
724 + (state & Mod4Mask ? 8 : 0)
725 + (state & ControlMask ? 16 : 0);
726
727 len = 0;
728 if(IS_SET(MODE_MOUSESGR)) {
729 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
730 button, x+1, y+1,
731 e->xbutton.type == ButtonRelease ? 'm' : 'M');
732 } else if(x < 223 && y < 223) {
733 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
734 32+button, 32+x+1, 32+y+1);
735 } else {
736 return;
737 }
738
739 ttywrite(buf, len);
740 }
741
742 void
743 bpress(XEvent *e) {
744 if(IS_SET(MODE_MOUSE)) {
745 mousereport(e);
746 } else if(e->xbutton.button == Button1) {
747 if(sel.bx != -1) {
748 sel.bx = -1;
749 tsetdirt(sel.b.y, sel.e.y);
750 draw();
751 }
752 sel.mode = 1;
753 sel.type = SEL_REGULAR;
754 sel.ex = sel.bx = x2col(e->xbutton.x);
755 sel.ey = sel.by = y2row(e->xbutton.y);
756 } else if(e->xbutton.button == Button4) {
757 ttywrite("\031", 1);
758 } else if(e->xbutton.button == Button5) {
759 ttywrite("\005", 1);
760 }
761 }
762
763 void
764 selcopy(void) {
765 char *str, *ptr, *p;
766 int x, y, bufsize, is_selected = 0, size;
767 Glyph *gp, *last;
768
769 if(sel.bx == -1) {
770 str = NULL;
771 } else {
772 bufsize = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
773 ptr = str = xmalloc(bufsize);
774
775 /* append every set & selected glyph to the selection */
776 for(y = sel.b.y; y < sel.e.y + 1; y++) {
777 is_selected = 0;
778 gp = &term.line[y][0];
779 last = gp + term.col;
780
781 while(--last >= gp && !(last->state & GLYPH_SET))
782 /* nothing */;
783
784 for(x = 0; gp <= last; x++, ++gp) {
785 if(!selected(x, y)) {
786 continue;
787 } else {
788 is_selected = 1;
789 }
790
791 p = (gp->state & GLYPH_SET) ? gp->c : " ";
792 size = utf8size(p);
793 memcpy(ptr, p, size);
794 ptr += size;
795 }
796 /* \n at the end of every selected line except for the last one */
797 if(is_selected && y < sel.e.y)
798 *ptr++ = '\n';
799 }
800 *ptr = 0;
801 }
802 xsetsel(str);
803 }
804
805 void
806 selnotify(XEvent *e) {
807 ulong nitems, ofs, rem;
808 int format;
809 uchar *data;
810 Atom type;
811
812 ofs = 0;
813 do {
814 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
815 False, AnyPropertyType, &type, &format,
816 &nitems, &rem, &data)) {
817 fprintf(stderr, "Clipboard allocation failed\n");
818 return;
819 }
820 ttywrite((const char *) data, nitems * format / 8);
821 XFree(data);
822 /* number of 32-bit chunks returned */
823 ofs += nitems * format / 32;
824 } while(rem > 0);
825 }
826
827 void
828 selpaste(const Arg *dummy) {
829 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
830 xw.win, CurrentTime);
831 }
832
833 void selclear(XEvent *e) {
834 if(sel.bx == -1)
835 return;
836 sel.bx = -1;
837 tsetdirt(sel.b.y, sel.e.y);
838 }
839
840 void
841 selrequest(XEvent *e) {
842 XSelectionRequestEvent *xsre;
843 XSelectionEvent xev;
844 Atom xa_targets, string;
845
846 xsre = (XSelectionRequestEvent *) e;
847 xev.type = SelectionNotify;
848 xev.requestor = xsre->requestor;
849 xev.selection = xsre->selection;
850 xev.target = xsre->target;
851 xev.time = xsre->time;
852 /* reject */
853 xev.property = None;
854
855 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
856 if(xsre->target == xa_targets) {
857 /* respond with the supported type */
858 string = sel.xtarget;
859 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
860 XA_ATOM, 32, PropModeReplace,
861 (uchar *) &string, 1);
862 xev.property = xsre->property;
863 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
864 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
865 xsre->target, 8, PropModeReplace,
866 (uchar *) sel.clip, strlen(sel.clip));
867 xev.property = xsre->property;
868 }
869
870 /* all done, send a notification to the listener */
871 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
872 fprintf(stderr, "Error sending SelectionNotify event\n");
873 }
874
875 void
876 xsetsel(char *str) {
877 /* register the selection for both the clipboard and the primary */
878 Atom clipboard;
879
880 free(sel.clip);
881 sel.clip = str;
882
883 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
884
885 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
886 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
887 }
888
889 void
890 brelease(XEvent *e) {
891 struct timeval now;
892
893 if(IS_SET(MODE_MOUSE)) {
894 mousereport(e);
895 return;
896 }
897
898 if(e->xbutton.button == Button2) {
899 selpaste(NULL);
900 } else if(e->xbutton.button == Button1) {
901 sel.mode = 0;
902 getbuttoninfo(e);
903 term.dirty[sel.ey] = 1;
904 if(sel.bx == sel.ex && sel.by == sel.ey) {
905 sel.bx = -1;
906 gettimeofday(&now, NULL);
907
908 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
909 /* triple click on the line */
910 sel.b.x = sel.bx = 0;
911 sel.e.x = sel.ex = term.col;
912 sel.b.y = sel.e.y = sel.ey;
913 selcopy();
914 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
915 /* double click to select word */
916 sel.bx = sel.ex;
917 while(sel.bx > 0 && term.line[sel.ey][sel.bx-1].state & GLYPH_SET &&
918 term.line[sel.ey][sel.bx-1].c[0] != ' ') {
919 sel.bx--;
920 }
921 sel.b.x = sel.bx;
922 while(sel.ex < term.col-1 && term.line[sel.ey][sel.ex+1].state & GLYPH_SET &&
923 term.line[sel.ey][sel.ex+1].c[0] != ' ') {
924 sel.ex++;
925 }
926 sel.e.x = sel.ex;
927 sel.b.y = sel.e.y = sel.ey;
928 selcopy();
929 }
930 } else {
931 selcopy();
932 }
933 }
934
935 memcpy(&sel.tclick2, &sel.tclick1, sizeof(struct timeval));
936 gettimeofday(&sel.tclick1, NULL);
937 }
938
939 void
940 bmotion(XEvent *e) {
941 int oldey, oldex, oldsby, oldsey;
942
943 if(IS_SET(MODE_MOUSE)) {
944 mousereport(e);
945 return;
946 }
947
948 if(!sel.mode)
949 return;
950
951 oldey = sel.ey;
952 oldex = sel.ex;
953 oldsby = sel.b.y;
954 oldsey = sel.e.y;
955 getbuttoninfo(e);
956
957 if(oldey != sel.ey || oldex != sel.ex) {
958 tsetdirt(MIN(sel.b.y, oldsby), MAX(sel.e.y, oldsey));
959 }
960 }
961
962 void
963 die(const char *errstr, ...) {
964 va_list ap;
965
966 va_start(ap, errstr);
967 vfprintf(stderr, errstr, ap);
968 va_end(ap);
969 exit(EXIT_FAILURE);
970 }
971
972 void
973 execsh(void) {
974 char **args;
975 char *envshell = getenv("SHELL");
976 const struct passwd *pass = getpwuid(getuid());
977 char buf[sizeof(long) * 8 + 1];
978
979 unsetenv("COLUMNS");
980 unsetenv("LINES");
981 unsetenv("TERMCAP");
982
983 if(pass) {
984 setenv("LOGNAME", pass->pw_name, 1);
985 setenv("USER", pass->pw_name, 1);
986 setenv("SHELL", pass->pw_shell, 0);
987 setenv("HOME", pass->pw_dir, 0);
988 }
989
990 snprintf(buf, sizeof(buf), "%lu", xw.win);
991 setenv("WINDOWID", buf, 1);
992
993 signal(SIGCHLD, SIG_DFL);
994 signal(SIGHUP, SIG_DFL);
995 signal(SIGINT, SIG_DFL);
996 signal(SIGQUIT, SIG_DFL);
997 signal(SIGTERM, SIG_DFL);
998 signal(SIGALRM, SIG_DFL);
999
1000 DEFAULT(envshell, shell);
1001 setenv("TERM", termname, 1);
1002 args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
1003 execvp(args[0], args);
1004 exit(EXIT_FAILURE);
1005 }
1006
1007 void
1008 sigchld(int a) {
1009 int stat = 0;
1010
1011 if(waitpid(pid, &stat, 0) < 0)
1012 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
1013
1014 if(WIFEXITED(stat)) {
1015 exit(WEXITSTATUS(stat));
1016 } else {
1017 exit(EXIT_FAILURE);
1018 }
1019 }
1020
1021 void
1022 ttynew(void) {
1023 int m, s;
1024 struct winsize w = {term.row, term.col, 0, 0};
1025
1026 /* seems to work fine on linux, openbsd and freebsd */
1027 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1028 die("openpty failed: %s\n", SERRNO);
1029
1030 switch(pid = fork()) {
1031 case -1:
1032 die("fork failed\n");
1033 break;
1034 case 0:
1035 setsid(); /* create a new process group */
1036 dup2(s, STDIN_FILENO);
1037 dup2(s, STDOUT_FILENO);
1038 dup2(s, STDERR_FILENO);
1039 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1040 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
1041 close(s);
1042 close(m);
1043 execsh();
1044 break;
1045 default:
1046 close(s);
1047 cmdfd = m;
1048 signal(SIGCHLD, sigchld);
1049 if(opt_io) {
1050 iofd = (!strcmp(opt_io, "-")) ?
1051 STDOUT_FILENO :
1052 open(opt_io, O_WRONLY | O_CREAT, 0666);
1053 if(iofd < 0) {
1054 fprintf(stderr, "Error opening %s:%s\n",
1055 opt_io, strerror(errno));
1056 }
1057 }
1058 }
1059 }
1060
1061 void
1062 dump(char c) {
1063 static int col;
1064
1065 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
1066 if(++col % 10 == 0)
1067 fprintf(stderr, "\n");
1068 }
1069
1070 void
1071 ttyread(void) {
1072 static char buf[BUFSIZ];
1073 static int buflen = 0;
1074 char *ptr;
1075 char s[UTF_SIZ];
1076 int charsize; /* size of utf8 char in bytes */
1077 long utf8c;
1078 int ret;
1079
1080 /* append read bytes to unprocessed bytes */
1081 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1082 die("Couldn't read from shell: %s\n", SERRNO);
1083
1084 /* process every complete utf8 char */
1085 buflen += ret;
1086 ptr = buf;
1087 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
1088 charsize = utf8decode(ptr, &utf8c);
1089 utf8encode(&utf8c, s);
1090 tputc(s, charsize);
1091 ptr += charsize;
1092 buflen -= charsize;
1093 }
1094
1095 /* keep any uncomplete utf8 char for the next call */
1096 memmove(buf, ptr, buflen);
1097 }
1098
1099 void
1100 ttywrite(const char *s, size_t n) {
1101 if(write(cmdfd, s, n) == -1)
1102 die("write error on tty: %s\n", SERRNO);
1103 }
1104
1105 void
1106 ttyresize(void) {
1107 struct winsize w;
1108
1109 w.ws_row = term.row;
1110 w.ws_col = term.col;
1111 w.ws_xpixel = xw.tw;
1112 w.ws_ypixel = xw.th;
1113 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1114 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
1115 }
1116
1117 void
1118 tsetdirt(int top, int bot) {
1119 int i;
1120
1121 LIMIT(top, 0, term.row-1);
1122 LIMIT(bot, 0, term.row-1);
1123
1124 for(i = top; i <= bot; i++)
1125 term.dirty[i] = 1;
1126 }
1127
1128 void
1129 tfulldirt(void) {
1130 tsetdirt(0, term.row-1);
1131 }
1132
1133 void
1134 tcursor(int mode) {
1135 static TCursor c;
1136
1137 if(mode == CURSOR_SAVE) {
1138 c = term.c;
1139 } else if(mode == CURSOR_LOAD) {
1140 term.c = c;
1141 tmoveto(c.x, c.y);
1142 }
1143 }
1144
1145 void
1146 treset(void) {
1147 uint i;
1148
1149 term.c = (TCursor){{
1150 .mode = ATTR_NULL,
1151 .fg = defaultfg,
1152 .bg = defaultbg
1153 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1154
1155 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1156 for(i = tabspaces; i < term.col; i += tabspaces)
1157 term.tabs[i] = 1;
1158 term.top = 0;
1159 term.bot = term.row - 1;
1160 term.mode = MODE_WRAP;
1161
1162 tclearregion(0, 0, term.col-1, term.row-1, 0);
1163 tmoveto(0, 0);
1164 tcursor(CURSOR_SAVE);
1165 }
1166
1167 void
1168 tnew(int col, int row) {
1169 /* set screen size */
1170 term.row = row;
1171 term.col = col;
1172 term.line = xmalloc(term.row * sizeof(Line));
1173 term.alt = xmalloc(term.row * sizeof(Line));
1174 term.dirty = xmalloc(term.row * sizeof(*term.dirty));
1175 term.tabs = xmalloc(term.col * sizeof(*term.tabs));
1176
1177 for(row = 0; row < term.row; row++) {
1178 term.line[row] = xmalloc(term.col * sizeof(Glyph));
1179 term.alt [row] = xmalloc(term.col * sizeof(Glyph));
1180 term.dirty[row] = 0;
1181 }
1182
1183 term.numlock = 1;
1184 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1185 /* setup screen */
1186 treset();
1187 }
1188
1189 void
1190 tswapscreen(void) {
1191 Line *tmp = term.line;
1192
1193 term.line = term.alt;
1194 term.alt = tmp;
1195 term.mode ^= MODE_ALTSCREEN;
1196 tfulldirt();
1197 }
1198
1199 void
1200 tscrolldown(int orig, int n) {
1201 int i;
1202 Line temp;
1203
1204 LIMIT(n, 0, term.bot-orig+1);
1205
1206 tclearregion(0, term.bot-n+1, term.col-1, term.bot, 0);
1207
1208 for(i = term.bot; i >= orig+n; i--) {
1209 temp = term.line[i];
1210 term.line[i] = term.line[i-n];
1211 term.line[i-n] = temp;
1212
1213 term.dirty[i] = 1;
1214 term.dirty[i-n] = 1;
1215 }
1216
1217 selscroll(orig, n);
1218 }
1219
1220 void
1221 tscrollup(int orig, int n) {
1222 int i;
1223 Line temp;
1224 LIMIT(n, 0, term.bot-orig+1);
1225
1226 tclearregion(0, orig, term.col-1, orig+n-1, 0);
1227
1228 for(i = orig; i <= term.bot-n; i++) {
1229 temp = term.line[i];
1230 term.line[i] = term.line[i+n];
1231 term.line[i+n] = temp;
1232
1233 term.dirty[i] = 1;
1234 term.dirty[i+n] = 1;
1235 }
1236
1237 selscroll(orig, -n);
1238 }
1239
1240 void
1241 selscroll(int orig, int n) {
1242 if(sel.bx == -1)
1243 return;
1244
1245 if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
1246 if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
1247 sel.bx = -1;
1248 return;
1249 }
1250 switch(sel.type) {
1251 case SEL_REGULAR:
1252 if(sel.by < term.top) {
1253 sel.by = term.top;
1254 sel.bx = 0;
1255 }
1256 if(sel.ey > term.bot) {
1257 sel.ey = term.bot;
1258 sel.ex = term.col;
1259 }
1260 break;
1261 case SEL_RECTANGULAR:
1262 if(sel.by < term.top)
1263 sel.by = term.top;
1264 if(sel.ey > term.bot)
1265 sel.ey = term.bot;
1266 break;
1267 };
1268 sel.b.y = sel.by, sel.b.x = sel.bx;
1269 sel.e.y = sel.ey, sel.e.x = sel.ex;
1270 }
1271 }
1272
1273 void
1274 tnewline(int first_col) {
1275 int y = term.c.y;
1276
1277 if(y == term.bot) {
1278 tscrollup(term.top, 1);
1279 } else {
1280 y++;
1281 }
1282 tmoveto(first_col ? 0 : term.c.x, y);
1283 }
1284
1285 void
1286 csiparse(void) {
1287 /* int noarg = 1; */
1288 char *p = csiescseq.buf;
1289
1290 csiescseq.narg = 0;
1291 if(*p == '?')
1292 csiescseq.priv = 1, p++;
1293
1294 while(p < csiescseq.buf+csiescseq.len) {
1295 while(isdigit(*p)) {
1296 csiescseq.arg[csiescseq.narg] *= 10;
1297 csiescseq.arg[csiescseq.narg] += *p++ - '0'/*, noarg = 0 */;
1298 }
1299 if(*p == ';' && csiescseq.narg+1 < ESC_ARG_SIZ) {
1300 csiescseq.narg++, p++;
1301 } else {
1302 csiescseq.mode = *p;
1303 csiescseq.narg++;
1304
1305 return;
1306 }
1307 }
1308 }
1309
1310 /* for absolute user moves, when decom is set */
1311 void
1312 tmoveato(int x, int y) {
1313 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1314 }
1315
1316 void
1317 tmoveto(int x, int y) {
1318 int miny, maxy;
1319
1320 if(term.c.state & CURSOR_ORIGIN) {
1321 miny = term.top;
1322 maxy = term.bot;
1323 } else {
1324 miny = 0;
1325 maxy = term.row - 1;
1326 }
1327 LIMIT(x, 0, term.col-1);
1328 LIMIT(y, miny, maxy);
1329 term.c.state &= ~CURSOR_WRAPNEXT;
1330 term.c.x = x;
1331 term.c.y = y;
1332 }
1333
1334 void
1335 tsetchar(char *c, Glyph *attr, int x, int y) {
1336 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1337 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1338 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1339 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1340 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1341 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1342 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1343 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1344 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1345 };
1346
1347 /*
1348 * The table is proudly stolen from rxvt.
1349 */
1350 if(attr->mode & ATTR_GFX) {
1351 if(c[0] >= 0x41 && c[0] <= 0x7e
1352 && vt100_0[c[0] - 0x41]) {
1353 c = vt100_0[c[0] - 0x41];
1354 }
1355 }
1356
1357 term.dirty[y] = 1;
1358 term.line[y][x] = *attr;
1359 memcpy(term.line[y][x].c, c, UTF_SIZ);
1360 term.line[y][x].state |= GLYPH_SET;
1361 }
1362
1363 void
1364 tclearregion(int x1, int y1, int x2, int y2, int bce) {
1365 int x, y, temp;
1366
1367 if(x1 > x2)
1368 temp = x1, x1 = x2, x2 = temp;
1369 if(y1 > y2)
1370 temp = y1, y1 = y2, y2 = temp;
1371
1372 LIMIT(x1, 0, term.col-1);
1373 LIMIT(x2, 0, term.col-1);
1374 LIMIT(y1, 0, term.row-1);
1375 LIMIT(y2, 0, term.row-1);
1376
1377 for(y = y1; y <= y2; y++) {
1378 term.dirty[y] = 1;
1379 for(x = x1; x <= x2; x++) {
1380 if(bce) {
1381 term.line[y][x] = term.c.attr;
1382 memcpy(term.line[y][x].c, " ", 2);
1383 term.line[y][x].state |= GLYPH_SET;
1384 } else {
1385 term.line[y][x].state = 0;
1386 }
1387 }
1388 }
1389 }
1390
1391 void
1392 tdeletechar(int n) {
1393 int src = term.c.x + n;
1394 int dst = term.c.x;
1395 int size = term.col - src;
1396
1397 term.dirty[term.c.y] = 1;
1398
1399 if(src >= term.col) {
1400 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 0);
1401 return;
1402 }
1403
1404 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1405 size * sizeof(Glyph));
1406 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y, 0);
1407 }
1408
1409 void
1410 tinsertblank(int n) {
1411 int src = term.c.x;
1412 int dst = src + n;
1413 int size = term.col - dst;
1414
1415 term.dirty[term.c.y] = 1;
1416
1417 if(dst >= term.col) {
1418 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 0);
1419 return;
1420 }
1421
1422 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1423 size * sizeof(Glyph));
1424 tclearregion(src, term.c.y, dst - 1, term.c.y, 0);
1425 }
1426
1427 void
1428 tinsertblankline(int n) {
1429 if(term.c.y < term.top || term.c.y > term.bot)
1430 return;
1431
1432 tscrolldown(term.c.y, n);
1433 }
1434
1435 void
1436 tdeleteline(int n) {
1437 if(term.c.y < term.top || term.c.y > term.bot)
1438 return;
1439
1440 tscrollup(term.c.y, n);
1441 }
1442
1443 void
1444 tsetattr(int *attr, int l) {
1445 int i;
1446
1447 for(i = 0; i < l; i++) {
1448 switch(attr[i]) {
1449 case 0:
1450 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD \
1451 | ATTR_ITALIC | ATTR_BLINK);
1452 term.c.attr.fg = defaultfg;
1453 term.c.attr.bg = defaultbg;
1454 break;
1455 case 1:
1456 term.c.attr.mode |= ATTR_BOLD;
1457 break;
1458 case 3:
1459 term.c.attr.mode |= ATTR_ITALIC;
1460 break;
1461 case 4:
1462 term.c.attr.mode |= ATTR_UNDERLINE;
1463 break;
1464 case 5: /* slow blink */
1465 case 6: /* rapid blink */
1466 term.c.attr.mode |= ATTR_BLINK;
1467 break;
1468 case 7:
1469 term.c.attr.mode |= ATTR_REVERSE;
1470 break;
1471 case 21:
1472 case 22:
1473 term.c.attr.mode &= ~ATTR_BOLD;
1474 break;
1475 case 23:
1476 term.c.attr.mode &= ~ATTR_ITALIC;
1477 break;
1478 case 24:
1479 term.c.attr.mode &= ~ATTR_UNDERLINE;
1480 break;
1481 case 25:
1482 case 26:
1483 term.c.attr.mode &= ~ATTR_BLINK;
1484 break;
1485 case 27:
1486 term.c.attr.mode &= ~ATTR_REVERSE;
1487 break;
1488 case 38:
1489 if(i + 2 < l && attr[i + 1] == 5) {
1490 i += 2;
1491 if(BETWEEN(attr[i], 0, 255)) {
1492 term.c.attr.fg = attr[i];
1493 } else {
1494 fprintf(stderr,
1495 "erresc: bad fgcolor %d\n",
1496 attr[i]);
1497 }
1498 } else {
1499 fprintf(stderr,
1500 "erresc(38): gfx attr %d unknown\n",
1501 attr[i]);
1502 }
1503 break;
1504 case 39:
1505 term.c.attr.fg = defaultfg;
1506 break;
1507 case 48:
1508 if(i + 2 < l && attr[i + 1] == 5) {
1509 i += 2;
1510 if(BETWEEN(attr[i], 0, 255)) {
1511 term.c.attr.bg = attr[i];
1512 } else {
1513 fprintf(stderr,
1514 "erresc: bad bgcolor %d\n",
1515 attr[i]);
1516 }
1517 } else {
1518 fprintf(stderr,
1519 "erresc(48): gfx attr %d unknown\n",
1520 attr[i]);
1521 }
1522 break;
1523 case 49:
1524 term.c.attr.bg = defaultbg;
1525 break;
1526 default:
1527 if(BETWEEN(attr[i], 30, 37)) {
1528 term.c.attr.fg = attr[i] - 30;
1529 } else if(BETWEEN(attr[i], 40, 47)) {
1530 term.c.attr.bg = attr[i] - 40;
1531 } else if(BETWEEN(attr[i], 90, 97)) {
1532 term.c.attr.fg = attr[i] - 90 + 8;
1533 } else if(BETWEEN(attr[i], 100, 107)) {
1534 term.c.attr.bg = attr[i] - 100 + 8;
1535 } else {
1536 fprintf(stderr,
1537 "erresc(default): gfx attr %d unknown\n",
1538 attr[i]), csidump();
1539 }
1540 break;
1541 }
1542 }
1543 }
1544
1545 void
1546 tsetscroll(int t, int b) {
1547 int temp;
1548
1549 LIMIT(t, 0, term.row-1);
1550 LIMIT(b, 0, term.row-1);
1551 if(t > b) {
1552 temp = t;
1553 t = b;
1554 b = temp;
1555 }
1556 term.top = t;
1557 term.bot = b;
1558 }
1559
1560 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1561
1562 void
1563 tsetmode(bool priv, bool set, int *args, int narg) {
1564 int *lim, mode;
1565 bool alt;
1566
1567 for(lim = args + narg; args < lim; ++args) {
1568 if(priv) {
1569 switch(*args) {
1570 break;
1571 case 1: /* DECCKM -- Cursor key */
1572 MODBIT(term.mode, set, MODE_APPCURSOR);
1573 break;
1574 case 5: /* DECSCNM -- Reverse video */
1575 mode = term.mode;
1576 MODBIT(term.mode, set, MODE_REVERSE);
1577 if(mode != term.mode)
1578 redraw(REDRAW_TIMEOUT);
1579 break;
1580 case 6: /* DECOM -- Origin */
1581 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1582 tmoveato(0, 0);
1583 break;
1584 case 7: /* DECAWM -- Auto wrap */
1585 MODBIT(term.mode, set, MODE_WRAP);
1586 break;
1587 case 0: /* Error (IGNORED) */
1588 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1589 case 3: /* DECCOLM -- Column (IGNORED) */
1590 case 4: /* DECSCLM -- Scroll (IGNORED) */
1591 case 8: /* DECARM -- Auto repeat (IGNORED) */
1592 case 18: /* DECPFF -- Printer feed (IGNORED) */
1593 case 19: /* DECPEX -- Printer extent (IGNORED) */
1594 case 42: /* DECNRCM -- National characters (IGNORED) */
1595 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1596 break;
1597 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1598 MODBIT(term.mode, !set, MODE_HIDE);
1599 break;
1600 case 1000: /* 1000,1002: enable xterm mouse report */
1601 MODBIT(term.mode, set, MODE_MOUSEBTN);
1602 MODBIT(term.mode, 0, MODE_MOUSEMOTION);
1603 break;
1604 case 1002:
1605 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1606 MODBIT(term.mode, 0, MODE_MOUSEBTN);
1607 break;
1608 case 1006:
1609 MODBIT(term.mode, set, MODE_MOUSESGR);
1610 break;
1611 case 1049: /* = 1047 and 1048 */
1612 case 47:
1613 case 1047: {
1614 alt = IS_SET(MODE_ALTSCREEN);
1615 if(alt) {
1616 tclearregion(0, 0, term.col-1,
1617 term.row-1, 0);
1618 }
1619 if(set ^ alt) /* set is always 1 or 0 */
1620 tswapscreen();
1621 if(*args != 1049)
1622 break;
1623 }
1624 /* pass through */
1625 case 1048:
1626 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1627 break;
1628 default:
1629 fprintf(stderr,
1630 "erresc: unknown private set/reset mode %d\n",
1631 *args);
1632 break;
1633 }
1634 } else {
1635 switch(*args) {
1636 case 0: /* Error (IGNORED) */
1637 break;
1638 case 2: /* KAM -- keyboard action */
1639 MODBIT(term.mode, set, MODE_KBDLOCK);
1640 break;
1641 case 4: /* IRM -- Insertion-replacement */
1642 MODBIT(term.mode, set, MODE_INSERT);
1643 break;
1644 case 12: /* SRM -- Send/Receive */
1645 MODBIT(term.mode, !set, MODE_ECHO);
1646 break;
1647 case 20: /* LNM -- Linefeed/new line */
1648 MODBIT(term.mode, set, MODE_CRLF);
1649 break;
1650 default:
1651 fprintf(stderr,
1652 "erresc: unknown set/reset mode %d\n",
1653 *args);
1654 break;
1655 }
1656 }
1657 }
1658 }
1659 #undef MODBIT
1660
1661
1662 void
1663 csihandle(void) {
1664 switch(csiescseq.mode) {
1665 default:
1666 unknown:
1667 fprintf(stderr, "erresc: unknown csi ");
1668 csidump();
1669 /* die(""); */
1670 break;
1671 case '@': /* ICH -- Insert <n> blank char */
1672 DEFAULT(csiescseq.arg[0], 1);
1673 tinsertblank(csiescseq.arg[0]);
1674 break;
1675 case 'A': /* CUU -- Cursor <n> Up */
1676 DEFAULT(csiescseq.arg[0], 1);
1677 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1678 break;
1679 case 'B': /* CUD -- Cursor <n> Down */
1680 case 'e': /* VPR --Cursor <n> Down */
1681 DEFAULT(csiescseq.arg[0], 1);
1682 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1683 break;
1684 case 'c': /* DA -- Device Attributes */
1685 if(csiescseq.arg[0] == 0)
1686 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1687 break;
1688 case 'C': /* CUF -- Cursor <n> Forward */
1689 case 'a': /* HPR -- Cursor <n> Forward */
1690 DEFAULT(csiescseq.arg[0], 1);
1691 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1692 break;
1693 case 'D': /* CUB -- Cursor <n> Backward */
1694 DEFAULT(csiescseq.arg[0], 1);
1695 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1696 break;
1697 case 'E': /* CNL -- Cursor <n> Down and first col */
1698 DEFAULT(csiescseq.arg[0], 1);
1699 tmoveto(0, term.c.y+csiescseq.arg[0]);
1700 break;
1701 case 'F': /* CPL -- Cursor <n> Up and first col */
1702 DEFAULT(csiescseq.arg[0], 1);
1703 tmoveto(0, term.c.y-csiescseq.arg[0]);
1704 break;
1705 case 'g': /* TBC -- Tabulation clear */
1706 switch(csiescseq.arg[0]) {
1707 case 0: /* clear current tab stop */
1708 term.tabs[term.c.x] = 0;
1709 break;
1710 case 3: /* clear all the tabs */
1711 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1712 break;
1713 default:
1714 goto unknown;
1715 }
1716 break;
1717 case 'G': /* CHA -- Move to <col> */
1718 case '`': /* HPA */
1719 DEFAULT(csiescseq.arg[0], 1);
1720 tmoveto(csiescseq.arg[0]-1, term.c.y);
1721 break;
1722 case 'H': /* CUP -- Move to <row> <col> */
1723 case 'f': /* HVP */
1724 DEFAULT(csiescseq.arg[0], 1);
1725 DEFAULT(csiescseq.arg[1], 1);
1726 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1727 break;
1728 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1729 DEFAULT(csiescseq.arg[0], 1);
1730 while(csiescseq.arg[0]--)
1731 tputtab(1);
1732 break;
1733 case 'J': /* ED -- Clear screen */
1734 sel.bx = -1;
1735 switch(csiescseq.arg[0]) {
1736 case 0: /* below */
1737 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 1);
1738 if(term.c.y < term.row-1) {
1739 tclearregion(0, term.c.y+1, term.col-1,
1740 term.row-1, 1);
1741 }
1742 break;
1743 case 1: /* above */
1744 if(term.c.y > 1)
1745 tclearregion(0, 0, term.col-1, term.c.y-1, 1);
1746 tclearregion(0, term.c.y, term.c.x, term.c.y, 1);
1747 break;
1748 case 2: /* all */
1749 tclearregion(0, 0, term.col-1, term.row-1, 1);
1750 break;
1751 default:
1752 goto unknown;
1753 }
1754 break;
1755 case 'K': /* EL -- Clear line */
1756 switch(csiescseq.arg[0]) {
1757 case 0: /* right */
1758 tclearregion(term.c.x, term.c.y, term.col-1,
1759 term.c.y, 1);
1760 break;
1761 case 1: /* left */
1762 tclearregion(0, term.c.y, term.c.x, term.c.y, 1);
1763 break;
1764 case 2: /* all */
1765 tclearregion(0, term.c.y, term.col-1, term.c.y, 1);
1766 break;
1767 }
1768 break;
1769 case 'S': /* SU -- Scroll <n> line up */
1770 DEFAULT(csiescseq.arg[0], 1);
1771 tscrollup(term.top, csiescseq.arg[0]);
1772 break;
1773 case 'T': /* SD -- Scroll <n> line down */
1774 DEFAULT(csiescseq.arg[0], 1);
1775 tscrolldown(term.top, csiescseq.arg[0]);
1776 break;
1777 case 'L': /* IL -- Insert <n> blank lines */
1778 DEFAULT(csiescseq.arg[0], 1);
1779 tinsertblankline(csiescseq.arg[0]);
1780 break;
1781 case 'l': /* RM -- Reset Mode */
1782 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
1783 break;
1784 case 'M': /* DL -- Delete <n> lines */
1785 DEFAULT(csiescseq.arg[0], 1);
1786 tdeleteline(csiescseq.arg[0]);
1787 break;
1788 case 'X': /* ECH -- Erase <n> char */
1789 DEFAULT(csiescseq.arg[0], 1);
1790 tclearregion(term.c.x, term.c.y,
1791 term.c.x + csiescseq.arg[0] - 1, term.c.y, 1);
1792 break;
1793 case 'P': /* DCH -- Delete <n> char */
1794 DEFAULT(csiescseq.arg[0], 1);
1795 tdeletechar(csiescseq.arg[0]);
1796 break;
1797 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
1798 DEFAULT(csiescseq.arg[0], 1);
1799 while(csiescseq.arg[0]--)
1800 tputtab(0);
1801 break;
1802 case 'd': /* VPA -- Move to <row> */
1803 DEFAULT(csiescseq.arg[0], 1);
1804 tmoveato(term.c.x, csiescseq.arg[0]-1);
1805 break;
1806 case 'h': /* SM -- Set terminal mode */
1807 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
1808 break;
1809 case 'm': /* SGR -- Terminal attribute (color) */
1810 tsetattr(csiescseq.arg, csiescseq.narg);
1811 break;
1812 case 'r': /* DECSTBM -- Set Scrolling Region */
1813 if(csiescseq.priv) {
1814 goto unknown;
1815 } else {
1816 DEFAULT(csiescseq.arg[0], 1);
1817 DEFAULT(csiescseq.arg[1], term.row);
1818 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
1819 tmoveato(0, 0);
1820 }
1821 break;
1822 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1823 tcursor(CURSOR_SAVE);
1824 break;
1825 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1826 tcursor(CURSOR_LOAD);
1827 break;
1828 }
1829 }
1830
1831 void
1832 csidump(void) {
1833 int i;
1834 uint c;
1835
1836 printf("ESC[");
1837 for(i = 0; i < csiescseq.len; i++) {
1838 c = csiescseq.buf[i] & 0xff;
1839 if(isprint(c)) {
1840 putchar(c);
1841 } else if(c == '\n') {
1842 printf("(\\n)");
1843 } else if(c == '\r') {
1844 printf("(\\r)");
1845 } else if(c == 0x1b) {
1846 printf("(\\e)");
1847 } else {
1848 printf("(%02x)", c);
1849 }
1850 }
1851 putchar('\n');
1852 }
1853
1854 void
1855 csireset(void) {
1856 memset(&csiescseq, 0, sizeof(csiescseq));
1857 }
1858
1859 void
1860 strhandle(void) {
1861 char *p = NULL;
1862 int i, j, narg;
1863
1864 strparse();
1865 narg = strescseq.narg;
1866
1867 switch(strescseq.type) {
1868 case ']': /* OSC -- Operating System Command */
1869 switch(i = atoi(strescseq.args[0])) {
1870 case 0:
1871 case 1:
1872 case 2:
1873 if(narg > 1)
1874 xsettitle(strescseq.args[1]);
1875 break;
1876 case 4: /* color set */
1877 if(narg < 3)
1878 break;
1879 p = strescseq.args[2];
1880 /* fall through */
1881 case 104: /* color reset, here p = NULL */
1882 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
1883 if (!xsetcolorname(j, p)) {
1884 fprintf(stderr, "erresc: invalid color %s\n", p);
1885 } else {
1886 /*
1887 * TODO if defaultbg color is changed, borders
1888 * are dirty
1889 */
1890 redraw(0);
1891 }
1892 break;
1893 default:
1894 fprintf(stderr, "erresc: unknown str ");
1895 strdump();
1896 break;
1897 }
1898 break;
1899 case 'k': /* old title set compatibility */
1900 xsettitle(strescseq.args[0]);
1901 break;
1902 case 'P': /* DSC -- Device Control String */
1903 case '_': /* APC -- Application Program Command */
1904 case '^': /* PM -- Privacy Message */
1905 default:
1906 fprintf(stderr, "erresc: unknown str ");
1907 strdump();
1908 /* die(""); */
1909 break;
1910 }
1911 }
1912
1913 void
1914 strparse(void) {
1915 /*
1916 * TODO: Implement parsing like for CSI when required.
1917 * Format: ESC type cmd ';' arg0 [';' argn] ESC \
1918 */
1919 int narg = 0;
1920 char *start = strescseq.buf, *end = start + strescseq.len;
1921 strescseq.args[0] = start;
1922 while(start < end && narg < LEN(strescseq.args)) {
1923 start = memchr(start, ';', end - start);
1924 if(!start)
1925 break;
1926 *start++ = '\0';
1927 if(start < end) {
1928 strescseq.args[++narg] = start;
1929 }
1930 }
1931 strescseq.narg = narg + 1;
1932 }
1933
1934 void
1935 strdump(void) {
1936 int i;
1937 uint c;
1938
1939 printf("ESC%c", strescseq.type);
1940 for(i = 0; i < strescseq.len; i++) {
1941 c = strescseq.buf[i] & 0xff;
1942 if(isprint(c)) {
1943 putchar(c);
1944 } else if(c == '\n') {
1945 printf("(\\n)");
1946 } else if(c == '\r') {
1947 printf("(\\r)");
1948 } else if(c == 0x1b) {
1949 printf("(\\e)");
1950 } else {
1951 printf("(%02x)", c);
1952 }
1953 }
1954 printf("ESC\\\n");
1955 }
1956
1957 void
1958 strreset(void) {
1959 memset(&strescseq, 0, sizeof(strescseq));
1960 }
1961
1962 void
1963 tputtab(bool forward) {
1964 uint x = term.c.x;
1965
1966 if(forward) {
1967 if(x == term.col)
1968 return;
1969 for(++x; x < term.col && !term.tabs[x]; ++x)
1970 /* nothing */ ;
1971 } else {
1972 if(x == 0)
1973 return;
1974 for(--x; x > 0 && !term.tabs[x]; --x)
1975 /* nothing */ ;
1976 }
1977 tmoveto(x, term.c.y);
1978 }
1979
1980 void
1981 techo(char *buf, int len) {
1982 for(; len > 0; buf++, len--) {
1983 char c = *buf;
1984
1985 if(c == '\033') { /* escape */
1986 tputc("^", 1);
1987 tputc("[", 1);
1988 } else if(c < '\x20') { /* control code */
1989 if(c != '\n' && c != '\r' && c != '\t') {
1990 c |= '\x40';
1991 tputc("^", 1);
1992 }
1993 tputc(&c, 1);
1994 } else {
1995 break;
1996 }
1997 }
1998 if(len)
1999 tputc(buf, len);
2000 }
2001
2002 void
2003 tputc(char *c, int len) {
2004 uchar ascii = *c;
2005 bool control = ascii < '\x20' || ascii == 0177;
2006
2007 if(iofd != -1) {
2008 if(xwrite(iofd, c, len) < 0) {
2009 fprintf(stderr, "Error writing in %s:%s\n",
2010 opt_io, strerror(errno));
2011 close(iofd);
2012 iofd = -1;
2013 }
2014 }
2015
2016 /*
2017 * STR sequences must be checked before anything else
2018 * because it can use some control codes as part of the sequence.
2019 */
2020 if(term.esc & ESC_STR) {
2021 switch(ascii) {
2022 case '\033':
2023 term.esc = ESC_START | ESC_STR_END;
2024 break;
2025 case '\a': /* backwards compatibility to xterm */
2026 term.esc = 0;
2027 strhandle();
2028 break;
2029 default:
2030 if(strescseq.len + len < sizeof(strescseq.buf)) {
2031 memmove(&strescseq.buf[strescseq.len], c, len);
2032 strescseq.len += len;
2033 } else {
2034 /*
2035 * Here is a bug in terminals. If the user never sends
2036 * some code to stop the str or esc command, then st
2037 * will stop responding. But this is better than
2038 * silently failing with unknown characters. At least
2039 * then users will report back.
2040 *
2041 * In the case users ever get fixed, here is the code:
2042 */
2043 /*
2044 * term.esc = 0;
2045 * strhandle();
2046 */
2047 }
2048 }
2049 return;
2050 }
2051
2052 /*
2053 * Actions of control codes must be performed as soon they arrive
2054 * because they can be embedded inside a control sequence, and
2055 * they must not cause conflicts with sequences.
2056 */
2057 if(control) {
2058 switch(ascii) {
2059 case '\t': /* HT */
2060 tputtab(1);
2061 return;
2062 case '\b': /* BS */
2063 tmoveto(term.c.x-1, term.c.y);
2064 return;
2065 case '\r': /* CR */
2066 tmoveto(0, term.c.y);
2067 return;
2068 case '\f': /* LF */
2069 case '\v': /* VT */
2070 case '\n': /* LF */
2071 /* go to first col if the mode is set */
2072 tnewline(IS_SET(MODE_CRLF));
2073 return;
2074 case '\a': /* BEL */
2075 if(!(xw.state & WIN_FOCUSED))
2076 xseturgency(1);
2077 return;
2078 case '\033': /* ESC */
2079 csireset();
2080 term.esc = ESC_START;
2081 return;
2082 case '\016': /* SO */
2083 case '\017': /* SI */
2084 /*
2085 * Different charsets are hard to handle. Applications
2086 * should use the right alt charset escapes for the
2087 * only reason they still exist: line drawing. The
2088 * rest is incompatible history st should not support.
2089 */
2090 return;
2091 case '\032': /* SUB */
2092 case '\030': /* CAN */
2093 csireset();
2094 return;
2095 case '\005': /* ENQ (IGNORED) */
2096 case '\000': /* NUL (IGNORED) */
2097 case '\021': /* XON (IGNORED) */
2098 case '\023': /* XOFF (IGNORED) */
2099 case 0177: /* DEL (IGNORED) */
2100 return;
2101 }
2102 } else if(term.esc & ESC_START) {
2103 if(term.esc & ESC_CSI) {
2104 csiescseq.buf[csiescseq.len++] = ascii;
2105 if(BETWEEN(ascii, 0x40, 0x7E)
2106 || csiescseq.len >= ESC_BUF_SIZ) {
2107 term.esc = 0;
2108 csiparse(), csihandle();
2109 }
2110 } else if(term.esc & ESC_STR_END) {
2111 term.esc = 0;
2112 if(ascii == '\\')
2113 strhandle();
2114 } else if(term.esc & ESC_ALTCHARSET) {
2115 switch(ascii) {
2116 case '0': /* Line drawing set */
2117 term.c.attr.mode |= ATTR_GFX;
2118 break;
2119 case 'B': /* USASCII */
2120 term.c.attr.mode &= ~ATTR_GFX;
2121 break;
2122 case 'A': /* UK (IGNORED) */
2123 case '<': /* multinational charset (IGNORED) */
2124 case '5': /* Finnish (IGNORED) */
2125 case 'C': /* Finnish (IGNORED) */
2126 case 'K': /* German (IGNORED) */
2127 break;
2128 default:
2129 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2130 }
2131 term.esc = 0;
2132 } else if(term.esc & ESC_TEST) {
2133 if(ascii == '8') { /* DEC screen alignment test. */
2134 char E[UTF_SIZ] = "E";
2135 int x, y;
2136
2137 for(x = 0; x < term.col; ++x) {
2138 for(y = 0; y < term.row; ++y)
2139 tsetchar(E, &term.c.attr, x, y);
2140 }
2141 }
2142 term.esc = 0;
2143 } else {
2144 switch(ascii) {
2145 case '[':
2146 term.esc |= ESC_CSI;
2147 break;
2148 case '#':
2149 term.esc |= ESC_TEST;
2150 break;
2151 case 'P': /* DCS -- Device Control String */
2152 case '_': /* APC -- Application Program Command */
2153 case '^': /* PM -- Privacy Message */
2154 case ']': /* OSC -- Operating System Command */
2155 case 'k': /* old title set compatibility */
2156 strreset();
2157 strescseq.type = ascii;
2158 term.esc |= ESC_STR;
2159 break;
2160 case '(': /* set primary charset G0 */
2161 term.esc |= ESC_ALTCHARSET;
2162 break;
2163 case ')': /* set secondary charset G1 (IGNORED) */
2164 case '*': /* set tertiary charset G2 (IGNORED) */
2165 case '+': /* set quaternary charset G3 (IGNORED) */
2166 term.esc = 0;
2167 break;
2168 case 'D': /* IND -- Linefeed */
2169 if(term.c.y == term.bot) {
2170 tscrollup(term.top, 1);
2171 } else {
2172 tmoveto(term.c.x, term.c.y+1);
2173 }
2174 term.esc = 0;
2175 break;
2176 case 'E': /* NEL -- Next line */
2177 tnewline(1); /* always go to first col */
2178 term.esc = 0;
2179 break;
2180 case 'H': /* HTS -- Horizontal tab stop */
2181 term.tabs[term.c.x] = 1;
2182 term.esc = 0;
2183 break;
2184 case 'M': /* RI -- Reverse index */
2185 if(term.c.y == term.top) {
2186 tscrolldown(term.top, 1);
2187 } else {
2188 tmoveto(term.c.x, term.c.y-1);
2189 }
2190 term.esc = 0;
2191 break;
2192 case 'Z': /* DECID -- Identify Terminal */
2193 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2194 term.esc = 0;
2195 break;
2196 case 'c': /* RIS -- Reset to inital state */
2197 treset();
2198 term.esc = 0;
2199 xresettitle();
2200 break;
2201 case '=': /* DECPAM -- Application keypad */
2202 term.mode |= MODE_APPKEYPAD;
2203 term.esc = 0;
2204 break;
2205 case '>': /* DECPNM -- Normal keypad */
2206 term.mode &= ~MODE_APPKEYPAD;
2207 term.esc = 0;
2208 break;
2209 case '7': /* DECSC -- Save Cursor */
2210 tcursor(CURSOR_SAVE);
2211 term.esc = 0;
2212 break;
2213 case '8': /* DECRC -- Restore Cursor */
2214 tcursor(CURSOR_LOAD);
2215 term.esc = 0;
2216 break;
2217 case '\\': /* ST -- Stop */
2218 term.esc = 0;
2219 break;
2220 default:
2221 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2222 (uchar) ascii, isprint(ascii)? ascii:'.');
2223 term.esc = 0;
2224 }
2225 }
2226 /*
2227 * All characters which form part of a sequence are not
2228 * printed
2229 */
2230 return;
2231 }
2232 /*
2233 * Display control codes only if we are in graphic mode
2234 */
2235 if(control && !(term.c.attr.mode & ATTR_GFX))
2236 return;
2237 if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
2238 sel.bx = -1;
2239 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
2240 tnewline(1); /* always go to first col */
2241
2242 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col) {
2243 memmove(&term.line[term.c.y][term.c.x+1],
2244 &term.line[term.c.y][term.c.x],
2245 (term.col - term.c.x - 1) * sizeof(Glyph));
2246 }
2247
2248 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2249 if(term.c.x+1 < term.col) {
2250 tmoveto(term.c.x+1, term.c.y);
2251 } else {
2252 term.c.state |= CURSOR_WRAPNEXT;
2253 }
2254 }
2255
2256 int
2257 tresize(int col, int row) {
2258 int i, x;
2259 int minrow = MIN(row, term.row);
2260 int mincol = MIN(col, term.col);
2261 int slide = term.c.y - row + 1;
2262 bool *bp;
2263
2264 if(col < 1 || row < 1)
2265 return 0;
2266
2267 /* free unneeded rows */
2268 i = 0;
2269 if(slide > 0) {
2270 /*
2271 * slide screen to keep cursor where we expect it -
2272 * tscrollup would work here, but we can optimize to
2273 * memmove because we're freeing the earlier lines
2274 */
2275 for(/* i = 0 */; i < slide; i++) {
2276 free(term.line[i]);
2277 free(term.alt[i]);
2278 }
2279 memmove(term.line, term.line + slide, row * sizeof(Line));
2280 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2281 }
2282 for(i += row; i < term.row; i++) {
2283 free(term.line[i]);
2284 free(term.alt[i]);
2285 }
2286
2287 /* resize to new height */
2288 term.line = xrealloc(term.line, row * sizeof(Line));
2289 term.alt = xrealloc(term.alt, row * sizeof(Line));
2290 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2291 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2292
2293 /* resize each row to new width, zero-pad if needed */
2294 for(i = 0; i < minrow; i++) {
2295 term.dirty[i] = 1;
2296 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2297 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2298 for(x = mincol; x < col; x++) {
2299 term.line[i][x].state = 0;
2300 term.alt[i][x].state = 0;
2301 }
2302 }
2303
2304 /* allocate any new rows */
2305 for(/* i == minrow */; i < row; i++) {
2306 term.dirty[i] = 1;
2307 term.line[i] = xcalloc(col, sizeof(Glyph));
2308 term.alt [i] = xcalloc(col, sizeof(Glyph));
2309 }
2310 if(col > term.col) {
2311 bp = term.tabs + term.col;
2312
2313 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2314 while(--bp > term.tabs && !*bp)
2315 /* nothing */ ;
2316 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2317 *bp = 1;
2318 }
2319 /* update terminal size */
2320 term.col = col;
2321 term.row = row;
2322 /* reset scrolling region */
2323 tsetscroll(0, row-1);
2324 /* make use of the LIMIT in tmoveto */
2325 tmoveto(term.c.x, term.c.y);
2326
2327 return (slide > 0);
2328 }
2329
2330 void
2331 xresize(int col, int row) {
2332 xw.tw = MAX(1, col * xw.cw);
2333 xw.th = MAX(1, row * xw.ch);
2334
2335 XFreePixmap(xw.dpy, xw.buf);
2336 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2337 DefaultDepth(xw.dpy, xw.scr));
2338 XSetForeground(xw.dpy, dc.gc, dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg].pixel);
2339 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
2340
2341 XftDrawChange(xw.draw, xw.buf);
2342 }
2343
2344 static inline ushort
2345 sixd_to_16bit(int x) {
2346 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2347 }
2348
2349 void
2350 xloadcols(void) {
2351 int i, r, g, b;
2352 XRenderColor color = { .alpha = 0xffff };
2353
2354 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
2355 for(i = 0; i < LEN(colorname); i++) {
2356 if(!colorname[i])
2357 continue;
2358 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2359 die("Could not allocate color '%s'\n", colorname[i]);
2360 }
2361 }
2362
2363 /* load colors [16-255] ; same colors as xterm */
2364 for(i = 16, r = 0; r < 6; r++) {
2365 for(g = 0; g < 6; g++) {
2366 for(b = 0; b < 6; b++) {
2367 color.red = sixd_to_16bit(r);
2368 color.green = sixd_to_16bit(g);
2369 color.blue = sixd_to_16bit(b);
2370 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i])) {
2371 die("Could not allocate color %d\n", i);
2372 }
2373 i++;
2374 }
2375 }
2376 }
2377
2378 for(r = 0; r < 24; r++, i++) {
2379 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
2380 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color,
2381 &dc.col[i])) {
2382 die("Could not allocate color %d\n", i);
2383 }
2384 }
2385 }
2386
2387 int
2388 xsetcolorname(int x, const char *name) {
2389 XRenderColor color = { .alpha = 0xffff };
2390 Colour colour;
2391 if (x < 0 || x > LEN(colorname))
2392 return -1;
2393 if(!name) {
2394 if(16 <= x && x < 16 + 216) {
2395 int r = (x - 16) / 36, g = ((x - 16) % 36) / 6, b = (x - 16) % 6;
2396 color.red = sixd_to_16bit(r);
2397 color.green = sixd_to_16bit(g);
2398 color.blue = sixd_to_16bit(b);
2399 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2400 return 0; /* something went wrong */
2401 dc.col[x] = colour;
2402 return 1;
2403 } else if (16 + 216 <= x && x < 256) {
2404 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (x - (16 + 216));
2405 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2406 return 0; /* something went wrong */
2407 dc.col[x] = colour;
2408 return 1;
2409 } else {
2410 name = colorname[x];
2411 }
2412 }
2413 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &colour))
2414 return 0;
2415 dc.col[x] = colour;
2416 return 1;
2417 }
2418
2419 void
2420 xtermclear(int col1, int row1, int col2, int row2) {
2421 XftDrawRect(xw.draw,
2422 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2423 borderpx + col1 * xw.cw,
2424 borderpx + row1 * xw.ch,
2425 (col2-col1+1) * xw.cw,
2426 (row2-row1+1) * xw.ch);
2427 }
2428
2429 /*
2430 * Absolute coordinates.
2431 */
2432 void
2433 xclear(int x1, int y1, int x2, int y2) {
2434 XftDrawRect(xw.draw,
2435 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2436 x1, y1, x2-x1, y2-y1);
2437 }
2438
2439 void
2440 xhints(void) {
2441 XClassHint class = {opt_class ? opt_class : termname, termname};
2442 XWMHints wm = {.flags = InputHint, .input = 1};
2443 XSizeHints *sizeh = NULL;
2444
2445 sizeh = XAllocSizeHints();
2446 if(xw.isfixed == False) {
2447 sizeh->flags = PSize | PResizeInc | PBaseSize;
2448 sizeh->height = xw.h;
2449 sizeh->width = xw.w;
2450 sizeh->height_inc = xw.ch;
2451 sizeh->width_inc = xw.cw;
2452 sizeh->base_height = 2 * borderpx;
2453 sizeh->base_width = 2 * borderpx;
2454 } else {
2455 sizeh->flags = PMaxSize | PMinSize;
2456 sizeh->min_width = sizeh->max_width = xw.fw;
2457 sizeh->min_height = sizeh->max_height = xw.fh;
2458 }
2459
2460 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
2461 XFree(sizeh);
2462 }
2463
2464 int
2465 xloadfont(Font *f, FcPattern *pattern) {
2466 FcPattern *match;
2467 FcResult result;
2468
2469 match = FcFontMatch(NULL, pattern, &result);
2470 if(!match)
2471 return 1;
2472
2473 if(!(f->set = FcFontSort(0, match, FcTrue, 0, &result))) {
2474 FcPatternDestroy(match);
2475 return 1;
2476 }
2477
2478 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2479 FcPatternDestroy(match);
2480 return 1;
2481 }
2482
2483 f->pattern = FcPatternDuplicate(pattern);
2484
2485 f->ascent = f->match->ascent;
2486 f->descent = f->match->descent;
2487 f->lbearing = 0;
2488 f->rbearing = f->match->max_advance_width;
2489
2490 f->height = f->match->height;
2491 f->width = f->lbearing + f->rbearing;
2492
2493 return 0;
2494 }
2495
2496 void
2497 xloadfonts(char *fontstr, int fontsize) {
2498 FcPattern *pattern;
2499 FcResult result;
2500 double fontval;
2501
2502 if(fontstr[0] == '-') {
2503 pattern = XftXlfdParse(fontstr, False, False);
2504 } else {
2505 pattern = FcNameParse((FcChar8 *)fontstr);
2506 }
2507
2508 if(!pattern)
2509 die("st: can't open font %s\n", fontstr);
2510
2511 if(fontsize > 0) {
2512 FcPatternDel(pattern, FC_PIXEL_SIZE);
2513 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2514 usedfontsize = fontsize;
2515 } else {
2516 result = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2517 if(result == FcResultMatch) {
2518 usedfontsize = (int)fontval;
2519 } else {
2520 /*
2521 * Default font size is 12, if none given. This is to
2522 * have a known usedfontsize value.
2523 */
2524 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
2525 usedfontsize = 12;
2526 }
2527 }
2528
2529 FcConfigSubstitute(0, pattern, FcMatchPattern);
2530 FcDefaultSubstitute(pattern);
2531
2532 if(xloadfont(&dc.font, pattern))
2533 die("st: can't open font %s\n", fontstr);
2534
2535 /* Setting character width and height. */
2536 xw.cw = dc.font.width;
2537 xw.ch = dc.font.height;
2538
2539 FcPatternDel(pattern, FC_SLANT);
2540 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
2541 if(xloadfont(&dc.ifont, pattern))
2542 die("st: can't open font %s\n", fontstr);
2543
2544 FcPatternDel(pattern, FC_WEIGHT);
2545 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
2546 if(xloadfont(&dc.ibfont, pattern))
2547 die("st: can't open font %s\n", fontstr);
2548
2549 FcPatternDel(pattern, FC_SLANT);
2550 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
2551 if(xloadfont(&dc.bfont, pattern))
2552 die("st: can't open font %s\n", fontstr);
2553
2554 FcPatternDestroy(pattern);
2555 }
2556
2557 void
2558 xunloadfonts(void) {
2559 int i, ip;
2560
2561 /*
2562 * Free the loaded fonts in the font cache. This is done backwards
2563 * from the frccur.
2564 */
2565 for(i = 0, ip = frccur; i < frclen; i++, ip--) {
2566 if(ip < 0)
2567 ip = LEN(frc) - 1;
2568 XftFontClose(xw.dpy, frc[ip].font);
2569 }
2570 frccur = -1;
2571 frclen = 0;
2572
2573 XftFontClose(xw.dpy, dc.font.match);
2574 FcPatternDestroy(dc.font.pattern);
2575 FcFontSetDestroy(dc.font.set);
2576 XftFontClose(xw.dpy, dc.bfont.match);
2577 FcPatternDestroy(dc.bfont.pattern);
2578 FcFontSetDestroy(dc.bfont.set);
2579 XftFontClose(xw.dpy, dc.ifont.match);
2580 FcPatternDestroy(dc.ifont.pattern);
2581 FcFontSetDestroy(dc.ifont.set);
2582 XftFontClose(xw.dpy, dc.ibfont.match);
2583 FcPatternDestroy(dc.ibfont.pattern);
2584 FcFontSetDestroy(dc.ibfont.set);
2585 }
2586
2587 void
2588 xzoom(const Arg *arg) {
2589 xunloadfonts();
2590 xloadfonts(usedfont, usedfontsize + arg->i);
2591 cresize(0, 0);
2592 redraw(0);
2593 }
2594
2595 void
2596 xinit(void) {
2597 XSetWindowAttributes attrs;
2598 XGCValues gcvalues;
2599 Cursor cursor;
2600 Window parent;
2601 int sw, sh;
2602
2603 if(!(xw.dpy = XOpenDisplay(NULL)))
2604 die("Can't open display\n");
2605 xw.scr = XDefaultScreen(xw.dpy);
2606 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
2607
2608 /* font */
2609 if(!FcInit())
2610 die("Could not init fontconfig.\n");
2611
2612 usedfont = (opt_font == NULL)? font : opt_font;
2613 xloadfonts(usedfont, 0);
2614
2615 /* colors */
2616 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
2617 xloadcols();
2618
2619 /* adjust fixed window geometry */
2620 if(xw.isfixed) {
2621 sw = DisplayWidth(xw.dpy, xw.scr);
2622 sh = DisplayHeight(xw.dpy, xw.scr);
2623 if(xw.fx < 0)
2624 xw.fx = sw + xw.fx - xw.fw - 1;
2625 if(xw.fy < 0)
2626 xw.fy = sh + xw.fy - xw.fh - 1;
2627
2628 xw.h = xw.fh;
2629 xw.w = xw.fw;
2630 } else {
2631 /* window - default size */
2632 xw.h = 2 * borderpx + term.row * xw.ch;
2633 xw.w = 2 * borderpx + term.col * xw.cw;
2634 xw.fx = 0;
2635 xw.fy = 0;
2636 }
2637
2638 /* Events */
2639 attrs.background_pixel = dc.col[defaultbg].pixel;
2640 attrs.border_pixel = dc.col[defaultbg].pixel;
2641 attrs.bit_gravity = NorthWestGravity;
2642 attrs.event_mask = FocusChangeMask | KeyPressMask
2643 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
2644 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
2645 attrs.colormap = xw.cmap;
2646
2647 parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
2648 XRootWindow(xw.dpy, xw.scr);
2649 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
2650 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
2651 xw.vis,
2652 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
2653 | CWColormap,
2654 &attrs);
2655
2656 memset(&gcvalues, 0, sizeof(gcvalues));
2657 gcvalues.graphics_exposures = False;
2658 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
2659 &gcvalues);
2660 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2661 DefaultDepth(xw.dpy, xw.scr));
2662 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
2663 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
2664
2665 /* Xft rendering context */
2666 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
2667
2668 /* input methods */
2669 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2670 XSetLocaleModifiers("@im=local");
2671 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2672 XSetLocaleModifiers("@im=");
2673 if((xw.xim = XOpenIM(xw.dpy,
2674 NULL, NULL, NULL)) == NULL) {
2675 die("XOpenIM failed. Could not open input"
2676 " device.\n");
2677 }
2678 }
2679 }
2680 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
2681 | XIMStatusNothing, XNClientWindow, xw.win,
2682 XNFocusWindow, xw.win, NULL);
2683 if(xw.xic == NULL)
2684 die("XCreateIC failed. Could not obtain input method.\n");
2685
2686 /* white cursor, black outline */
2687 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
2688 XDefineCursor(xw.dpy, xw.win, cursor);
2689 XRecolorCursor(xw.dpy, cursor,
2690 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
2691 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
2692
2693 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
2694 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
2695 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
2696
2697 xresettitle();
2698 XMapWindow(xw.dpy, xw.win);
2699 xhints();
2700 XSync(xw.dpy, 0);
2701 }
2702
2703 void
2704 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
2705 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
2706 width = charlen * xw.cw, xp, i;
2707 int frp, frcflags;
2708 int u8fl, u8fblen, u8cblen, doesexist;
2709 char *u8c, *u8fs;
2710 long u8char;
2711 Font *font = &dc.font;
2712 FcResult fcres;
2713 FcPattern *fcpattern, *fontpattern;
2714 FcFontSet *fcsets[] = { NULL };
2715 FcCharSet *fccharset;
2716 Colour *fg = &dc.col[base.fg], *bg = &dc.col[base.bg],
2717 *temp, revfg, revbg;
2718 XRenderColor colfg, colbg;
2719
2720 frcflags = FRC_NORMAL;
2721
2722 if(base.mode & ATTR_BOLD) {
2723 if(BETWEEN(base.fg, 0, 7)) {
2724 /* basic system colors */
2725 fg = &dc.col[base.fg + 8];
2726 } else if(BETWEEN(base.fg, 16, 195)) {
2727 /* 256 colors */
2728 fg = &dc.col[base.fg + 36];
2729 } else if(BETWEEN(base.fg, 232, 251)) {
2730 /* greyscale */
2731 fg = &dc.col[base.fg + 4];
2732 }
2733 /*
2734 * Those ranges will not be brightened:
2735 * 8 - 15 – bright system colors
2736 * 196 - 231 – highest 256 color cube
2737 * 252 - 255 – brightest colors in greyscale
2738 */
2739 font = &dc.bfont;
2740 frcflags = FRC_BOLD;
2741 }
2742
2743 if(base.mode & ATTR_ITALIC) {
2744 font = &dc.ifont;
2745 frcflags = FRC_ITALIC;
2746 }
2747 if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
2748 font = &dc.ibfont;
2749 frcflags = FRC_ITALICBOLD;
2750 }
2751
2752 if(IS_SET(MODE_REVERSE)) {
2753 if(fg == &dc.col[defaultfg]) {
2754 fg = &dc.col[defaultbg];
2755 } else {
2756 colfg.red = ~fg->color.red;
2757 colfg.green = ~fg->color.green;
2758 colfg.blue = ~fg->color.blue;
2759 colfg.alpha = fg->color.alpha;
2760 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
2761 fg = &revfg;
2762 }
2763
2764 if(bg == &dc.col[defaultbg]) {
2765 bg = &dc.col[defaultfg];
2766 } else {
2767 colbg.red = ~bg->color.red;
2768 colbg.green = ~bg->color.green;
2769 colbg.blue = ~bg->color.blue;
2770 colbg.alpha = bg->color.alpha;
2771 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &revbg);
2772 bg = &revbg;
2773 }
2774 }
2775
2776 if(base.mode & ATTR_REVERSE) {
2777 temp = fg;
2778 fg = bg;
2779 bg = temp;
2780 }
2781
2782 /* Intelligent cleaning up of the borders. */
2783 if(x == 0) {
2784 xclear(0, (y == 0)? 0 : winy, borderpx,
2785 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
2786 }
2787 if(x + charlen >= term.col) {
2788 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
2789 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
2790 }
2791 if(y == 0)
2792 xclear(winx, 0, winx + width, borderpx);
2793 if(y == term.row-1)
2794 xclear(winx, winy + xw.ch, winx + width, xw.h);
2795
2796 /* Clean up the region we want to draw to. */
2797 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
2798
2799 fcsets[0] = font->set;
2800 for(xp = winx; bytelen > 0;) {
2801 /*
2802 * Search for the range in the to be printed string of glyphs
2803 * that are in the main font. Then print that range. If
2804 * some glyph is found that is not in the font, do the
2805 * fallback dance.
2806 */
2807 u8fs = s;
2808 u8fblen = 0;
2809 u8fl = 0;
2810 for(;;) {
2811 u8c = s;
2812 u8cblen = utf8decode(s, &u8char);
2813 s += u8cblen;
2814 bytelen -= u8cblen;
2815
2816 doesexist = XftCharIndex(xw.dpy, font->match, u8char);
2817 if(!doesexist || bytelen <= 0) {
2818 if(bytelen <= 0) {
2819 if(doesexist) {
2820 u8fl++;
2821 u8fblen += u8cblen;
2822 }
2823 }
2824
2825 if(u8fl > 0) {
2826 XftDrawStringUtf8(xw.draw, fg,
2827 font->match, xp,
2828 winy + font->ascent,
2829 (FcChar8 *)u8fs,
2830 u8fblen);
2831 xp += font->width * u8fl;
2832 }
2833 break;
2834 }
2835
2836 u8fl++;
2837 u8fblen += u8cblen;
2838 }
2839 if(doesexist)
2840 break;
2841
2842 frp = frccur;
2843 /* Search the font cache. */
2844 for(i = 0; i < frclen; i++, frp--) {
2845 if(frp <= 0)
2846 frp = LEN(frc) - 1;
2847
2848 if(frc[frp].c == u8char
2849 && frc[frp].flags == frcflags) {
2850 break;
2851 }
2852 }
2853
2854 /* Nothing was found. */
2855 if(i >= frclen) {
2856 /*
2857 * Nothing was found in the cache. Now use
2858 * some dozen of Fontconfig calls to get the
2859 * font for one single character.
2860 */
2861 fcpattern = FcPatternDuplicate(font->pattern);
2862 fccharset = FcCharSetCreate();
2863
2864 FcCharSetAddChar(fccharset, u8char);
2865 FcPatternAddCharSet(fcpattern, FC_CHARSET,
2866 fccharset);
2867 FcPatternAddBool(fcpattern, FC_SCALABLE,
2868 FcTrue);
2869
2870 FcConfigSubstitute(0, fcpattern,
2871 FcMatchPattern);
2872 FcDefaultSubstitute(fcpattern);
2873
2874 fontpattern = FcFontSetMatch(0, fcsets,
2875 FcTrue, fcpattern, &fcres);
2876
2877 /*
2878 * Overwrite or create the new cache entry
2879 * entry.
2880 */
2881 frccur++;
2882 frclen++;
2883 if(frccur >= LEN(frc))
2884 frccur = 0;
2885 if(frclen > LEN(frc)) {
2886 frclen = LEN(frc);
2887 XftFontClose(xw.dpy, frc[frccur].font);
2888 }
2889
2890 frc[frccur].font = XftFontOpenPattern(xw.dpy,
2891 fontpattern);
2892 frc[frccur].c = u8char;
2893 frc[frccur].flags = frcflags;
2894
2895 FcPatternDestroy(fcpattern);
2896 FcCharSetDestroy(fccharset);
2897
2898 frp = frccur;
2899 }
2900
2901 XftDrawStringUtf8(xw.draw, fg, frc[frp].font,
2902 xp, winy + frc[frp].font->ascent,
2903 (FcChar8 *)u8c, u8cblen);
2904
2905 xp += font->width;
2906 }
2907
2908 /*
2909 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
2910 winy + font->ascent, (FcChar8 *)s, bytelen);
2911 */
2912
2913 if(base.mode & ATTR_UNDERLINE) {
2914 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
2915 width, 1);
2916 }
2917 }
2918
2919 void
2920 xdrawcursor(void) {
2921 static int oldx = 0, oldy = 0;
2922 int sl;
2923 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs, 0};
2924
2925 LIMIT(oldx, 0, term.col-1);
2926 LIMIT(oldy, 0, term.row-1);
2927
2928 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
2929 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
2930
2931 /* remove the old cursor */
2932 if(term.line[oldy][oldx].state & GLYPH_SET) {
2933 sl = utf8size(term.line[oldy][oldx].c);
2934 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
2935 oldy, 1, sl);
2936 } else {
2937 xtermclear(oldx, oldy, oldx, oldy);
2938 }
2939
2940 /* draw the new one */
2941 if(!(IS_SET(MODE_HIDE))) {
2942 if(!(xw.state & WIN_FOCUSED))
2943 g.bg = defaultucs;
2944
2945 if(IS_SET(MODE_REVERSE))
2946 g.mode |= ATTR_REVERSE, g.fg = defaultcs, g.bg = defaultfg;
2947
2948 sl = utf8size(g.c);
2949 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
2950 oldx = term.c.x, oldy = term.c.y;
2951 }
2952 }
2953
2954
2955 void
2956 xsettitle(char *p) {
2957 XTextProperty prop;
2958
2959 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
2960 &prop);
2961 XSetWMName(xw.dpy, xw.win, &prop);
2962 }
2963
2964 void
2965 xresettitle(void) {
2966 xsettitle(opt_title ? opt_title : "st");
2967 }
2968
2969 void
2970 redraw(int timeout) {
2971 struct timespec tv = {0, timeout * 1000};
2972
2973 tfulldirt();
2974 draw();
2975
2976 if(timeout > 0) {
2977 nanosleep(&tv, NULL);
2978 XSync(xw.dpy, False); /* necessary for a good tput flash */
2979 }
2980 }
2981
2982 void
2983 draw(void) {
2984 drawregion(0, 0, term.col, term.row);
2985 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
2986 xw.h, 0, 0);
2987 XSetForeground(xw.dpy, dc.gc,
2988 dc.col[IS_SET(MODE_REVERSE)?
2989 defaultfg : defaultbg].pixel);
2990 }
2991
2992 void
2993 drawregion(int x1, int y1, int x2, int y2) {
2994 int ic, ib, x, y, ox, sl;
2995 Glyph base, new;
2996 char buf[DRAW_BUF_SIZ];
2997 bool ena_sel = sel.bx != -1;
2998
2999 if(sel.alt ^ IS_SET(MODE_ALTSCREEN))
3000 ena_sel = 0;
3001
3002 if(!(xw.state & WIN_VISIBLE))
3003 return;
3004
3005 for(y = y1; y < y2; y++) {
3006 if(!term.dirty[y])
3007 continue;
3008
3009 xtermclear(0, y, term.col, y);
3010 term.dirty[y] = 0;
3011 base = term.line[y][0];
3012 ic = ib = ox = 0;
3013 for(x = x1; x < x2; x++) {
3014 new = term.line[y][x];
3015 if(ena_sel && *(new.c) && selected(x, y))
3016 new.mode ^= ATTR_REVERSE;
3017 if(ib > 0 && (!(new.state & GLYPH_SET)
3018 || ATTRCMP(base, new)
3019 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3020 xdraws(buf, base, ox, y, ic, ib);
3021 ic = ib = 0;
3022 }
3023 if(new.state & GLYPH_SET) {
3024 if(ib == 0) {
3025 ox = x;
3026 base = new;
3027 }
3028
3029 sl = utf8size(new.c);
3030 memcpy(buf+ib, new.c, sl);
3031 ib += sl;
3032 ++ic;
3033 }
3034 }
3035 if(ib > 0)
3036 xdraws(buf, base, ox, y, ic, ib);
3037 }
3038 xdrawcursor();
3039 }
3040
3041 void
3042 expose(XEvent *ev) {
3043 XExposeEvent *e = &ev->xexpose;
3044
3045 if(xw.state & WIN_REDRAW) {
3046 if(!e->count)
3047 xw.state &= ~WIN_REDRAW;
3048 }
3049 redraw(0);
3050 }
3051
3052 void
3053 visibility(XEvent *ev) {
3054 XVisibilityEvent *e = &ev->xvisibility;
3055
3056 if(e->state == VisibilityFullyObscured) {
3057 xw.state &= ~WIN_VISIBLE;
3058 } else if(!(xw.state & WIN_VISIBLE)) {
3059 /* need a full redraw for next Expose, not just a buf copy */
3060 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3061 }
3062 }
3063
3064 void
3065 unmap(XEvent *ev) {
3066 xw.state &= ~WIN_VISIBLE;
3067 }
3068
3069 void
3070 xseturgency(int add) {
3071 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3072
3073 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
3074 XSetWMHints(xw.dpy, xw.win, h);
3075 XFree(h);
3076 }
3077
3078 void
3079 focus(XEvent *ev) {
3080 XFocusChangeEvent *e = &ev->xfocus;
3081
3082 if(e->mode == NotifyGrab)
3083 return;
3084
3085 if(ev->type == FocusIn) {
3086 XSetICFocus(xw.xic);
3087 xw.state |= WIN_FOCUSED;
3088 xseturgency(0);
3089 } else {
3090 XUnsetICFocus(xw.xic);
3091 xw.state &= ~WIN_FOCUSED;
3092 }
3093 }
3094
3095 inline bool
3096 match(uint mask, uint state) {
3097 state &= ~(ignoremod);
3098
3099 if(mask == XK_NO_MOD && state)
3100 return false;
3101 if(mask != XK_ANY_MOD && mask != XK_NO_MOD && !state)
3102 return false;
3103 if((state & mask) != state)
3104 return false;
3105 return true;
3106 }
3107
3108 void
3109 numlock(const Arg *dummy) {
3110 term.numlock ^= 1;
3111 }
3112
3113 char*
3114 kmap(KeySym k, uint state) {
3115 uint mask;
3116 Key *kp;
3117 int i;
3118
3119 /* Check for mapped keys out of X11 function keys. */
3120 for(i = 0; i < LEN(mappedkeys); i++) {
3121 if(mappedkeys[i] == k)
3122 break;
3123 }
3124 if(i == LEN(mappedkeys)) {
3125 if((k & 0xFFFF) < 0xFD00)
3126 return NULL;
3127 }
3128
3129 for(kp = key; kp < key + LEN(key); kp++) {
3130 mask = kp->mask;
3131
3132 if(kp->k != k)
3133 continue;
3134
3135 if(!match(mask, state))
3136 continue;
3137
3138 if(kp->appkey > 0) {
3139 if(!IS_SET(MODE_APPKEYPAD))
3140 continue;
3141 if(term.numlock && kp->appkey == 2)
3142 continue;
3143 } else if(kp->appkey < 0 && IS_SET(MODE_APPKEYPAD)) {
3144 continue;
3145 }
3146
3147 if((kp->appcursor < 0 && IS_SET(MODE_APPCURSOR)) ||
3148 (kp->appcursor > 0
3149 && !IS_SET(MODE_APPCURSOR))) {
3150 continue;
3151 }
3152
3153 if((kp->crlf < 0 && IS_SET(MODE_CRLF)) ||
3154 (kp->crlf > 0 && !IS_SET(MODE_CRLF))) {
3155 continue;
3156 }
3157
3158 return kp->s;
3159 }
3160
3161 return NULL;
3162 }
3163
3164 void
3165 kpress(XEvent *ev) {
3166 XKeyEvent *e = &ev->xkey;
3167 KeySym ksym;
3168 char xstr[31], buf[32], *customkey, *cp = buf;
3169 int len;
3170 Status status;
3171 Shortcut *bp;
3172
3173 if(IS_SET(MODE_KBDLOCK))
3174 return;
3175
3176 len = XmbLookupString(xw.xic, e, xstr, sizeof(xstr), &ksym, &status);
3177 e->state &= ~Mod2Mask;
3178 /* 1. shortcuts */
3179 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3180 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3181 bp->func(&(bp->arg));
3182 return;
3183 }
3184 }
3185
3186 /* 2. custom keys from config.h */
3187 if((customkey = kmap(ksym, e->state))) {
3188 len = strlen(customkey);
3189 memcpy(buf, customkey, len);
3190 /* 2. hardcoded (overrides X lookup) */
3191 } else {
3192 if(len == 0)
3193 return;
3194
3195 if(len == 1 && e->state & Mod1Mask)
3196 *cp++ = '\033';
3197
3198 memcpy(cp, xstr, len);
3199 len = cp - buf + len;
3200 }
3201
3202 ttywrite(buf, len);
3203 if(IS_SET(MODE_ECHO))
3204 techo(buf, len);
3205 }
3206
3207
3208 void
3209 cmessage(XEvent *e) {
3210 /*
3211 * See xembed specs
3212 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3213 */
3214 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3215 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3216 xw.state |= WIN_FOCUSED;
3217 xseturgency(0);
3218 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3219 xw.state &= ~WIN_FOCUSED;
3220 }
3221 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3222 /* Send SIGHUP to shell */
3223 kill(pid, SIGHUP);
3224 exit(EXIT_SUCCESS);
3225 }
3226 }
3227
3228 void
3229 cresize(int width, int height) {
3230 int col, row;
3231
3232 if(width != 0)
3233 xw.w = width;
3234 if(height != 0)
3235 xw.h = height;
3236
3237 col = (xw.w - 2 * borderpx) / xw.cw;
3238 row = (xw.h - 2 * borderpx) / xw.ch;
3239
3240 tresize(col, row);
3241 xresize(col, row);
3242 ttyresize();
3243 }
3244
3245 void
3246 resize(XEvent *e) {
3247 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3248 return;
3249
3250 cresize(e->xconfigure.width, e->xconfigure.height);
3251 }
3252
3253 void
3254 run(void) {
3255 XEvent ev;
3256 fd_set rfd;
3257 int xfd = XConnectionNumber(xw.dpy), xev;
3258 struct timeval drawtimeout, *tv = NULL, now, last;
3259
3260 gettimeofday(&last, NULL);
3261
3262 for(xev = actionfps;;) {
3263 FD_ZERO(&rfd);
3264 FD_SET(cmdfd, &rfd);
3265 FD_SET(xfd, &rfd);
3266 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
3267 if(errno == EINTR)
3268 continue;
3269 die("select failed: %s\n", SERRNO);
3270 }
3271
3272 gettimeofday(&now, NULL);
3273 drawtimeout.tv_sec = 0;
3274 drawtimeout.tv_usec = (1000/xfps) * 1000;
3275 tv = &drawtimeout;
3276
3277 if(FD_ISSET(cmdfd, &rfd))
3278 ttyread();
3279
3280 if(FD_ISSET(xfd, &rfd))
3281 xev = actionfps;
3282
3283 if(TIMEDIFF(now, last) > \
3284 (xev ? (1000/xfps) : (1000/actionfps))) {
3285 while(XPending(xw.dpy)) {
3286 XNextEvent(xw.dpy, &ev);
3287 if(XFilterEvent(&ev, None))
3288 continue;
3289 if(handler[ev.type])
3290 (handler[ev.type])(&ev);
3291 }
3292
3293 draw();
3294 XFlush(xw.dpy);
3295 last = now;
3296
3297 if(xev && !FD_ISSET(xfd, &rfd))
3298 xev--;
3299 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd))
3300 tv = NULL;
3301 }
3302 }
3303 }
3304
3305 int
3306 main(int argc, char *argv[]) {
3307 int i, bitm, xr, yr;
3308 uint wr, hr;
3309
3310 xw.fw = xw.fh = xw.fx = xw.fy = 0;
3311 xw.isfixed = False;
3312
3313 for(i = 1; i < argc; i++) {
3314 switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
3315 case 'c':
3316 if(++i < argc)
3317 opt_class = argv[i];
3318 break;
3319 case 'e':
3320 /* eat all remaining arguments */
3321 if(++i < argc)
3322 opt_cmd = &argv[i];
3323 goto run;
3324 case 'f':
3325 if(++i < argc)
3326 opt_font = argv[i];
3327 break;
3328 case 'g':
3329 if(++i >= argc)
3330 break;
3331
3332 bitm = XParseGeometry(argv[i], &xr, &yr, &wr, &hr);
3333 if(bitm & XValue)
3334 xw.fx = xr;
3335 if(bitm & YValue)
3336 xw.fy = yr;
3337 if(bitm & WidthValue)
3338 xw.fw = (int)wr;
3339 if(bitm & HeightValue)
3340 xw.fh = (int)hr;
3341 if(bitm & XNegative && xw.fx == 0)
3342 xw.fx = -1;
3343 if(bitm & XNegative && xw.fy == 0)
3344 xw.fy = -1;
3345
3346 if(xw.fh != 0 && xw.fw != 0)
3347 xw.isfixed = True;
3348 break;
3349 case 'o':
3350 if(++i < argc)
3351 opt_io = argv[i];
3352 break;
3353 case 't':
3354 if(++i < argc)
3355 opt_title = argv[i];
3356 break;
3357 case 'v':
3358 default:
3359 die(USAGE);
3360 case 'w':
3361 if(++i < argc)
3362 opt_embed = argv[i];
3363 break;
3364 }
3365 }
3366
3367 run:
3368 setlocale(LC_CTYPE, "");
3369 XSetLocaleModifiers("");
3370 tnew(80, 24);
3371 xinit();
3372 ttynew();
3373 selinit();
3374 run();
3375
3376 return 0;
3377 }
3378