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Adding PgUp and PgDown + Ctrl to config.def.h
[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 #define Glyph Glyph_
31 #define Font Font_
32 #define Draw XftDraw *
33 #define Colour XftColor
34 #define Colourmap Colormap
35
36 #if defined(__linux)
37 #include <pty.h>
38 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
39 #include <util.h>
40 #elif defined(__FreeBSD__) || defined(__DragonFly__)
41 #include <libutil.h>
42 #endif
43
44 #define USAGE \
45 "st " VERSION " (c) 2010-2013 st engineers\n" \
46 "usage: st [-v] [-c class] [-f font] [-g geometry] [-o file]" \
47 " [-t title] [-w windowid] [-e command ...]\n"
48
49 /* XEMBED messages */
50 #define XEMBED_FOCUS_IN 4
51 #define XEMBED_FOCUS_OUT 5
52
53 /* Arbitrary sizes */
54 #define UTF_SIZ 4
55 #define ESC_BUF_SIZ (128*UTF_SIZ)
56 #define ESC_ARG_SIZ 16
57 #define STR_BUF_SIZ ESC_BUF_SIZ
58 #define STR_ARG_SIZ ESC_ARG_SIZ
59 #define DRAW_BUF_SIZ 20*1024
60 #define XK_ANY_MOD UINT_MAX
61 #define XK_NO_MOD 0
62 #define XK_SWITCH_MOD (1<<13)
63
64 #define REDRAW_TIMEOUT (80*1000) /* 80 ms */
65
66 /* macros */
67 #define SERRNO strerror(errno)
68 #define MIN(a, b) ((a) < (b) ? (a) : (b))
69 #define MAX(a, b) ((a) < (b) ? (b) : (a))
70 #define LEN(a) (sizeof(a) / sizeof(a[0]))
71 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
72 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
73 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
74 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
75 #define IS_SET(flag) ((term.mode & (flag)) != 0)
76 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_usec-t2.tv_usec)/1000)
77
78 #define VT102ID "\033[?6c"
79
80 enum glyph_attribute {
81 ATTR_NULL = 0,
82 ATTR_REVERSE = 1,
83 ATTR_UNDERLINE = 2,
84 ATTR_BOLD = 4,
85 ATTR_GFX = 8,
86 ATTR_ITALIC = 16,
87 ATTR_BLINK = 32,
88 };
89
90 enum cursor_movement {
91 CURSOR_SAVE,
92 CURSOR_LOAD
93 };
94
95 enum cursor_state {
96 CURSOR_DEFAULT = 0,
97 CURSOR_WRAPNEXT = 1,
98 CURSOR_ORIGIN = 2
99 };
100
101 enum glyph_state {
102 GLYPH_SET = 1,
103 GLYPH_DIRTY = 2
104 };
105
106 enum term_mode {
107 MODE_WRAP = 1,
108 MODE_INSERT = 2,
109 MODE_APPKEYPAD = 4,
110 MODE_ALTSCREEN = 8,
111 MODE_CRLF = 16,
112 MODE_MOUSEBTN = 32,
113 MODE_MOUSEMOTION = 64,
114 MODE_MOUSE = 32|64,
115 MODE_REVERSE = 128,
116 MODE_KBDLOCK = 256,
117 MODE_HIDE = 512,
118 MODE_ECHO = 1024,
119 MODE_APPCURSOR = 2048,
120 MODE_MOUSESGR = 4096,
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 /* bit macro */
144 #undef B0
145 enum { B0=1, B1=2, B2=4, B3=8, B4=16, B5=32, B6=64, B7=128 };
146
147 typedef unsigned char uchar;
148 typedef unsigned int uint;
149 typedef unsigned long ulong;
150 typedef unsigned short ushort;
151
152 typedef struct {
153 char c[UTF_SIZ]; /* character code */
154 uchar mode; /* attribute flags */
155 ushort fg; /* foreground */
156 ushort bg; /* background */
157 uchar state; /* state flags */
158 } Glyph;
159
160 typedef Glyph *Line;
161
162 typedef struct {
163 Glyph attr; /* current char attributes */
164 int x;
165 int y;
166 char state;
167 } TCursor;
168
169 /* CSI Escape sequence structs */
170 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
171 typedef struct {
172 char buf[ESC_BUF_SIZ]; /* raw string */
173 int len; /* raw string length */
174 char priv;
175 int arg[ESC_ARG_SIZ];
176 int narg; /* nb of args */
177 char mode;
178 } CSIEscape;
179
180 /* STR Escape sequence structs */
181 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
182 typedef struct {
183 char type; /* ESC type ... */
184 char buf[STR_BUF_SIZ]; /* raw string */
185 int len; /* raw string length */
186 char *args[STR_ARG_SIZ];
187 int narg; /* nb of args */
188 } STREscape;
189
190 /* Internal representation of the screen */
191 typedef struct {
192 int row; /* nb row */
193 int col; /* nb col */
194 Line *line; /* screen */
195 Line *alt; /* alternate screen */
196 bool *dirty; /* dirtyness of lines */
197 TCursor c; /* cursor */
198 int top; /* top scroll limit */
199 int bot; /* bottom scroll limit */
200 int mode; /* terminal mode flags */
201 int esc; /* escape state flags */
202 bool numlock; /* lock numbers in keyboard */
203 bool *tabs;
204 } Term;
205
206 /* Purely graphic info */
207 typedef struct {
208 Display *dpy;
209 Colourmap cmap;
210 Window win;
211 Drawable buf;
212 Atom xembed, wmdeletewin;
213 XIM xim;
214 XIC xic;
215 Draw draw;
216 Visual *vis;
217 int scr;
218 bool isfixed; /* is fixed geometry? */
219 int fx, fy, fw, fh; /* fixed geometry */
220 int tw, th; /* tty width and height */
221 int w, h; /* window width and height */
222 int ch; /* char height */
223 int cw; /* char width */
224 char state; /* focus, redraw, visible */
225 } XWindow;
226
227 typedef struct {
228 KeySym k;
229 uint mask;
230 char s[ESC_BUF_SIZ];
231 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
232 signed char appkey; /* application keypad */
233 signed char appcursor; /* application cursor */
234 signed char crlf; /* crlf mode */
235 } Key;
236
237 /* TODO: use better name for vars... */
238 typedef struct {
239 int mode;
240 int type;
241 int bx, by;
242 int ex, ey;
243 struct {
244 int x, y;
245 } b, e;
246 char *clip;
247 Atom xtarget;
248 bool alt;
249 struct timeval tclick1;
250 struct timeval tclick2;
251 } Selection;
252
253 typedef union {
254 int i;
255 unsigned int ui;
256 float f;
257 const void *v;
258 } Arg;
259
260 typedef struct {
261 unsigned int mod;
262 KeySym keysym;
263 void (*func)(const Arg *);
264 const Arg arg;
265 } Shortcut;
266
267 /* function definitions used in config.h */
268 static void clippaste(const Arg *);
269 static void numlock(const Arg *);
270 static void selpaste(const Arg *);
271 static void xzoom(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
653 return BETWEEN(x, bx, ex);
654 }
655
656 if(sel.type == SEL_RECTANGULAR) {
657 return ((sel.b.y <= y && y <= sel.e.y)
658 && (sel.b.x <= x && x <= sel.e.x));
659 }
660 return ((sel.b.y < y && y < sel.e.y)
661 || (y == sel.e.y && x <= sel.e.x))
662 || (y == sel.b.y && x >= sel.b.x
663 && (x <= sel.e.x || sel.b.y != sel.e.y));
664 }
665
666 void
667 getbuttoninfo(XEvent *e) {
668 int type;
669 uint state = e->xbutton.state &~Button1Mask;
670
671 sel.alt = IS_SET(MODE_ALTSCREEN);
672
673 sel.ex = x2col(e->xbutton.x);
674 sel.ey = y2row(e->xbutton.y);
675
676 sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
677 sel.b.y = MIN(sel.by, sel.ey);
678 sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
679 sel.e.y = MAX(sel.by, sel.ey);
680
681 sel.type = SEL_REGULAR;
682 for(type = 1; type < LEN(selmasks); ++type) {
683 if(match(selmasks[type], state)) {
684 sel.type = type;
685 break;
686 }
687 }
688 }
689
690 void
691 mousereport(XEvent *e) {
692 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
693 button = e->xbutton.button, state = e->xbutton.state,
694 len;
695 char buf[40];
696 static int ob, ox, oy;
697
698 /* from urxvt */
699 if(e->xbutton.type == MotionNotify) {
700 if(!IS_SET(MODE_MOUSEMOTION) || (x == ox && y == oy))
701 return;
702 button = ob + 32;
703 ox = x, oy = y;
704 } else if(!IS_SET(MODE_MOUSESGR)
705 && (e->xbutton.type == ButtonRelease
706 || button == AnyButton)) {
707 button = 3;
708 } else {
709 button -= Button1;
710 if(button >= 3)
711 button += 64 - 3;
712 if(e->xbutton.type == ButtonPress) {
713 ob = button;
714 ox = x, oy = y;
715 }
716 }
717
718 button += (state & ShiftMask ? 4 : 0)
719 + (state & Mod4Mask ? 8 : 0)
720 + (state & ControlMask ? 16 : 0);
721
722 len = 0;
723 if(IS_SET(MODE_MOUSESGR)) {
724 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
725 button, x+1, y+1,
726 e->xbutton.type == ButtonRelease ? 'm' : 'M');
727 } else if(x < 223 && y < 223) {
728 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
729 32+button, 32+x+1, 32+y+1);
730 } else {
731 return;
732 }
733
734 ttywrite(buf, len);
735 }
736
737 void
738 bpress(XEvent *e) {
739 if(IS_SET(MODE_MOUSE)) {
740 mousereport(e);
741 } else if(e->xbutton.button == Button1) {
742 if(sel.bx != -1) {
743 sel.bx = -1;
744 tsetdirt(sel.b.y, sel.e.y);
745 draw();
746 }
747 sel.mode = 1;
748 sel.type = SEL_REGULAR;
749 sel.ex = sel.bx = x2col(e->xbutton.x);
750 sel.ey = sel.by = y2row(e->xbutton.y);
751 } else if(e->xbutton.button == Button4) {
752 ttywrite("\031", 1);
753 } else if(e->xbutton.button == Button5) {
754 ttywrite("\005", 1);
755 }
756 }
757
758 void
759 selcopy(void) {
760 char *str, *ptr, *p;
761 int x, y, bufsize, is_selected = 0, size;
762 Glyph *gp, *last;
763
764 if(sel.bx == -1) {
765 str = NULL;
766 } else {
767 bufsize = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
768 ptr = str = xmalloc(bufsize);
769
770 /* append every set & selected glyph to the selection */
771 for(y = sel.b.y; y < sel.e.y + 1; y++) {
772 is_selected = 0;
773 gp = &term.line[y][0];
774 last = gp + term.col;
775
776 while(--last >= gp && !(last->state & GLYPH_SET))
777 /* nothing */;
778
779 for(x = 0; gp <= last; x++, ++gp) {
780 if(!selected(x, y)) {
781 continue;
782 } else {
783 is_selected = 1;
784 }
785
786 p = (gp->state & GLYPH_SET) ? gp->c : " ";
787 size = utf8size(p);
788 memcpy(ptr, p, size);
789 ptr += size;
790 }
791 /* \n at the end of every selected line except for the last one */
792 if(is_selected && y < sel.e.y)
793 *ptr++ = '\r';
794 }
795 *ptr = 0;
796 }
797 xsetsel(str);
798 }
799
800 void
801 selnotify(XEvent *e) {
802 ulong nitems, ofs, rem;
803 int format;
804 uchar *data;
805 Atom type;
806
807 ofs = 0;
808 do {
809 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
810 False, AnyPropertyType, &type, &format,
811 &nitems, &rem, &data)) {
812 fprintf(stderr, "Clipboard allocation failed\n");
813 return;
814 }
815 ttywrite((const char *) data, nitems * format / 8);
816 XFree(data);
817 /* number of 32-bit chunks returned */
818 ofs += nitems * format / 32;
819 } while(rem > 0);
820 }
821
822 void
823 selpaste(const Arg *dummy) {
824 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
825 xw.win, CurrentTime);
826 }
827
828 void
829 clippaste(const Arg *dummy) {
830 Atom clipboard;
831
832 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
833 XConvertSelection(xw.dpy, clipboard, sel.xtarget, XA_PRIMARY,
834 xw.win, CurrentTime);
835 }
836
837 void
838 selclear(XEvent *e) {
839 if(sel.bx == -1)
840 return;
841 sel.bx = -1;
842 tsetdirt(sel.b.y, sel.e.y);
843 }
844
845 void
846 selrequest(XEvent *e) {
847 XSelectionRequestEvent *xsre;
848 XSelectionEvent xev;
849 Atom xa_targets, string;
850
851 xsre = (XSelectionRequestEvent *) e;
852 xev.type = SelectionNotify;
853 xev.requestor = xsre->requestor;
854 xev.selection = xsre->selection;
855 xev.target = xsre->target;
856 xev.time = xsre->time;
857 /* reject */
858 xev.property = None;
859
860 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
861 if(xsre->target == xa_targets) {
862 /* respond with the supported type */
863 string = sel.xtarget;
864 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
865 XA_ATOM, 32, PropModeReplace,
866 (uchar *) &string, 1);
867 xev.property = xsre->property;
868 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
869 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
870 xsre->target, 8, PropModeReplace,
871 (uchar *) sel.clip, strlen(sel.clip));
872 xev.property = xsre->property;
873 }
874
875 /* all done, send a notification to the listener */
876 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
877 fprintf(stderr, "Error sending SelectionNotify event\n");
878 }
879
880 void
881 xsetsel(char *str) {
882 /* register the selection for both the clipboard and the primary */
883 Atom clipboard;
884
885 free(sel.clip);
886 sel.clip = str;
887
888 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
889
890 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
891 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
892 }
893
894 void
895 brelease(XEvent *e) {
896 struct timeval now;
897
898 if(IS_SET(MODE_MOUSE)) {
899 mousereport(e);
900 return;
901 }
902
903 if(e->xbutton.button == Button2) {
904 selpaste(NULL);
905 } else if(e->xbutton.button == Button1) {
906 sel.mode = 0;
907 getbuttoninfo(e);
908 term.dirty[sel.ey] = 1;
909 if(sel.bx == sel.ex && sel.by == sel.ey) {
910 sel.bx = -1;
911 gettimeofday(&now, NULL);
912
913 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
914 /* triple click on the line */
915 sel.b.x = sel.bx = 0;
916 sel.e.x = sel.ex = term.col;
917 sel.b.y = sel.e.y = sel.ey;
918 selcopy();
919 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
920 /* double click to select word */
921 sel.bx = sel.ex;
922 while(sel.bx > 0 && term.line[sel.ey][sel.bx-1].state & GLYPH_SET &&
923 term.line[sel.ey][sel.bx-1].c[0] != ' ') {
924 sel.bx--;
925 }
926 sel.b.x = sel.bx;
927 while(sel.ex < term.col-1 && term.line[sel.ey][sel.ex+1].state & GLYPH_SET &&
928 term.line[sel.ey][sel.ex+1].c[0] != ' ') {
929 sel.ex++;
930 }
931 sel.e.x = sel.ex;
932 sel.b.y = sel.e.y = sel.ey;
933 selcopy();
934 }
935 } else {
936 selcopy();
937 }
938 }
939
940 memcpy(&sel.tclick2, &sel.tclick1, sizeof(struct timeval));
941 gettimeofday(&sel.tclick1, NULL);
942 }
943
944 void
945 bmotion(XEvent *e) {
946 int oldey, oldex, oldsby, oldsey;
947
948 if(IS_SET(MODE_MOUSE)) {
949 mousereport(e);
950 return;
951 }
952
953 if(!sel.mode)
954 return;
955
956 oldey = sel.ey;
957 oldex = sel.ex;
958 oldsby = sel.b.y;
959 oldsey = sel.e.y;
960 getbuttoninfo(e);
961
962 if(oldey != sel.ey || oldex != sel.ex) {
963 tsetdirt(MIN(sel.b.y, oldsby), MAX(sel.e.y, oldsey));
964 }
965 }
966
967 void
968 die(const char *errstr, ...) {
969 va_list ap;
970
971 va_start(ap, errstr);
972 vfprintf(stderr, errstr, ap);
973 va_end(ap);
974 exit(EXIT_FAILURE);
975 }
976
977 void
978 execsh(void) {
979 char **args;
980 char *envshell = getenv("SHELL");
981 const struct passwd *pass = getpwuid(getuid());
982 char buf[sizeof(long) * 8 + 1];
983
984 unsetenv("COLUMNS");
985 unsetenv("LINES");
986 unsetenv("TERMCAP");
987
988 if(pass) {
989 setenv("LOGNAME", pass->pw_name, 1);
990 setenv("USER", pass->pw_name, 1);
991 setenv("SHELL", pass->pw_shell, 0);
992 setenv("HOME", pass->pw_dir, 0);
993 }
994
995 snprintf(buf, sizeof(buf), "%lu", xw.win);
996 setenv("WINDOWID", buf, 1);
997
998 signal(SIGCHLD, SIG_DFL);
999 signal(SIGHUP, SIG_DFL);
1000 signal(SIGINT, SIG_DFL);
1001 signal(SIGQUIT, SIG_DFL);
1002 signal(SIGTERM, SIG_DFL);
1003 signal(SIGALRM, SIG_DFL);
1004
1005 DEFAULT(envshell, shell);
1006 setenv("TERM", termname, 1);
1007 args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
1008 execvp(args[0], args);
1009 exit(EXIT_FAILURE);
1010 }
1011
1012 void
1013 sigchld(int a) {
1014 int stat = 0;
1015
1016 if(waitpid(pid, &stat, 0) < 0)
1017 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
1018
1019 if(WIFEXITED(stat)) {
1020 exit(WEXITSTATUS(stat));
1021 } else {
1022 exit(EXIT_FAILURE);
1023 }
1024 }
1025
1026 void
1027 ttynew(void) {
1028 int m, s;
1029 struct winsize w = {term.row, term.col, 0, 0};
1030
1031 /* seems to work fine on linux, openbsd and freebsd */
1032 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1033 die("openpty failed: %s\n", SERRNO);
1034
1035 switch(pid = fork()) {
1036 case -1:
1037 die("fork failed\n");
1038 break;
1039 case 0:
1040 setsid(); /* create a new process group */
1041 dup2(s, STDIN_FILENO);
1042 dup2(s, STDOUT_FILENO);
1043 dup2(s, STDERR_FILENO);
1044 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1045 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
1046 close(s);
1047 close(m);
1048 execsh();
1049 break;
1050 default:
1051 close(s);
1052 cmdfd = m;
1053 signal(SIGCHLD, sigchld);
1054 if(opt_io) {
1055 iofd = (!strcmp(opt_io, "-")) ?
1056 STDOUT_FILENO :
1057 open(opt_io, O_WRONLY | O_CREAT, 0666);
1058 if(iofd < 0) {
1059 fprintf(stderr, "Error opening %s:%s\n",
1060 opt_io, strerror(errno));
1061 }
1062 }
1063 }
1064 }
1065
1066 void
1067 dump(char c) {
1068 static int col;
1069
1070 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
1071 if(++col % 10 == 0)
1072 fprintf(stderr, "\n");
1073 }
1074
1075 void
1076 ttyread(void) {
1077 static char buf[BUFSIZ];
1078 static int buflen = 0;
1079 char *ptr;
1080 char s[UTF_SIZ];
1081 int charsize; /* size of utf8 char in bytes */
1082 long utf8c;
1083 int ret;
1084
1085 /* append read bytes to unprocessed bytes */
1086 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1087 die("Couldn't read from shell: %s\n", SERRNO);
1088
1089 /* process every complete utf8 char */
1090 buflen += ret;
1091 ptr = buf;
1092 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
1093 charsize = utf8decode(ptr, &utf8c);
1094 utf8encode(&utf8c, s);
1095 tputc(s, charsize);
1096 ptr += charsize;
1097 buflen -= charsize;
1098 }
1099
1100 /* keep any uncomplete utf8 char for the next call */
1101 memmove(buf, ptr, buflen);
1102 }
1103
1104 void
1105 ttywrite(const char *s, size_t n) {
1106 if(write(cmdfd, s, n) == -1)
1107 die("write error on tty: %s\n", SERRNO);
1108 }
1109
1110 void
1111 ttyresize(void) {
1112 struct winsize w;
1113
1114 w.ws_row = term.row;
1115 w.ws_col = term.col;
1116 w.ws_xpixel = xw.tw;
1117 w.ws_ypixel = xw.th;
1118 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1119 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
1120 }
1121
1122 void
1123 tsetdirt(int top, int bot) {
1124 int i;
1125
1126 LIMIT(top, 0, term.row-1);
1127 LIMIT(bot, 0, term.row-1);
1128
1129 for(i = top; i <= bot; i++)
1130 term.dirty[i] = 1;
1131 }
1132
1133 void
1134 tfulldirt(void) {
1135 tsetdirt(0, term.row-1);
1136 }
1137
1138 void
1139 tcursor(int mode) {
1140 static TCursor c;
1141
1142 if(mode == CURSOR_SAVE) {
1143 c = term.c;
1144 } else if(mode == CURSOR_LOAD) {
1145 term.c = c;
1146 tmoveto(c.x, c.y);
1147 }
1148 }
1149
1150 void
1151 treset(void) {
1152 uint i;
1153
1154 term.c = (TCursor){{
1155 .mode = ATTR_NULL,
1156 .fg = defaultfg,
1157 .bg = defaultbg
1158 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1159
1160 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1161 for(i = tabspaces; i < term.col; i += tabspaces)
1162 term.tabs[i] = 1;
1163 term.top = 0;
1164 term.bot = term.row - 1;
1165 term.mode = MODE_WRAP;
1166
1167 tclearregion(0, 0, term.col-1, term.row-1, 0);
1168 tmoveto(0, 0);
1169 tcursor(CURSOR_SAVE);
1170 }
1171
1172 void
1173 tnew(int col, int row) {
1174 /* set screen size */
1175 term.row = row;
1176 term.col = col;
1177 term.line = xmalloc(term.row * sizeof(Line));
1178 term.alt = xmalloc(term.row * sizeof(Line));
1179 term.dirty = xmalloc(term.row * sizeof(*term.dirty));
1180 term.tabs = xmalloc(term.col * sizeof(*term.tabs));
1181
1182 for(row = 0; row < term.row; row++) {
1183 term.line[row] = xmalloc(term.col * sizeof(Glyph));
1184 term.alt [row] = xmalloc(term.col * sizeof(Glyph));
1185 term.dirty[row] = 0;
1186 }
1187
1188 term.numlock = 1;
1189 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1190 /* setup screen */
1191 treset();
1192 }
1193
1194 void
1195 tswapscreen(void) {
1196 Line *tmp = term.line;
1197
1198 term.line = term.alt;
1199 term.alt = tmp;
1200 term.mode ^= MODE_ALTSCREEN;
1201 tfulldirt();
1202 }
1203
1204 void
1205 tscrolldown(int orig, int n) {
1206 int i;
1207 Line temp;
1208
1209 LIMIT(n, 0, term.bot-orig+1);
1210
1211 tclearregion(0, term.bot-n+1, term.col-1, term.bot, 0);
1212
1213 for(i = term.bot; i >= orig+n; i--) {
1214 temp = term.line[i];
1215 term.line[i] = term.line[i-n];
1216 term.line[i-n] = temp;
1217
1218 term.dirty[i] = 1;
1219 term.dirty[i-n] = 1;
1220 }
1221
1222 selscroll(orig, n);
1223 }
1224
1225 void
1226 tscrollup(int orig, int n) {
1227 int i;
1228 Line temp;
1229 LIMIT(n, 0, term.bot-orig+1);
1230
1231 tclearregion(0, orig, term.col-1, orig+n-1, 0);
1232
1233 for(i = orig; i <= term.bot-n; i++) {
1234 temp = term.line[i];
1235 term.line[i] = term.line[i+n];
1236 term.line[i+n] = temp;
1237
1238 term.dirty[i] = 1;
1239 term.dirty[i+n] = 1;
1240 }
1241
1242 selscroll(orig, -n);
1243 }
1244
1245 void
1246 selscroll(int orig, int n) {
1247 if(sel.bx == -1)
1248 return;
1249
1250 if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
1251 if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
1252 sel.bx = -1;
1253 return;
1254 }
1255 if(sel.type == SEL_RECTANGULAR) {
1256 if(sel.by < term.top)
1257 sel.by = term.top;
1258 if(sel.ey > term.bot)
1259 sel.ey = term.bot;
1260 } else {
1261 if(sel.by < term.top) {
1262 sel.by = term.top;
1263 sel.bx = 0;
1264 }
1265 if(sel.ey > term.bot) {
1266 sel.ey = term.bot;
1267 sel.ex = term.col;
1268 }
1269 }
1270 sel.b.y = sel.by, sel.b.x = sel.bx;
1271 sel.e.y = sel.ey, sel.e.x = sel.ex;
1272 }
1273 }
1274
1275 void
1276 tnewline(int first_col) {
1277 int y = term.c.y;
1278
1279 if(y == term.bot) {
1280 tscrollup(term.top, 1);
1281 } else {
1282 y++;
1283 }
1284 tmoveto(first_col ? 0 : term.c.x, y);
1285 }
1286
1287 void
1288 csiparse(void) {
1289 char *p = csiescseq.buf, *np;
1290 long int v;
1291
1292 csiescseq.narg = 0;
1293 if(*p == '?') {
1294 csiescseq.priv = 1;
1295 p++;
1296 }
1297
1298 csiescseq.buf[csiescseq.len] = '\0';
1299 while(p < csiescseq.buf+csiescseq.len) {
1300 np = NULL;
1301 v = strtol(p, &np, 10);
1302 if(np == p)
1303 v = 0;
1304 if(v == LONG_MAX || v == LONG_MIN)
1305 v = -1;
1306 csiescseq.arg[csiescseq.narg++] = v;
1307 p = np;
1308 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1309 break;
1310 p++;
1311 }
1312 csiescseq.mode = *p;
1313 }
1314
1315 /* for absolute user moves, when decom is set */
1316 void
1317 tmoveato(int x, int y) {
1318 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1319 }
1320
1321 void
1322 tmoveto(int x, int y) {
1323 int miny, maxy;
1324
1325 if(term.c.state & CURSOR_ORIGIN) {
1326 miny = term.top;
1327 maxy = term.bot;
1328 } else {
1329 miny = 0;
1330 maxy = term.row - 1;
1331 }
1332 LIMIT(x, 0, term.col-1);
1333 LIMIT(y, miny, maxy);
1334 term.c.state &= ~CURSOR_WRAPNEXT;
1335 term.c.x = x;
1336 term.c.y = y;
1337 }
1338
1339 void
1340 tsetchar(char *c, Glyph *attr, int x, int y) {
1341 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1342 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1343 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1344 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1345 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1346 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1347 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1348 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1349 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1350 };
1351
1352 /*
1353 * The table is proudly stolen from rxvt.
1354 */
1355 if(attr->mode & ATTR_GFX) {
1356 if(c[0] >= 0x41 && c[0] <= 0x7e
1357 && vt100_0[c[0] - 0x41]) {
1358 c = vt100_0[c[0] - 0x41];
1359 }
1360 }
1361
1362 term.dirty[y] = 1;
1363 term.line[y][x] = *attr;
1364 memcpy(term.line[y][x].c, c, UTF_SIZ);
1365 term.line[y][x].state |= GLYPH_SET;
1366 }
1367
1368 void
1369 tclearregion(int x1, int y1, int x2, int y2, int bce) {
1370 int x, y, temp;
1371
1372 if(x1 > x2)
1373 temp = x1, x1 = x2, x2 = temp;
1374 if(y1 > y2)
1375 temp = y1, y1 = y2, y2 = temp;
1376
1377 LIMIT(x1, 0, term.col-1);
1378 LIMIT(x2, 0, term.col-1);
1379 LIMIT(y1, 0, term.row-1);
1380 LIMIT(y2, 0, term.row-1);
1381
1382 for(y = y1; y <= y2; y++) {
1383 term.dirty[y] = 1;
1384 for(x = x1; x <= x2; x++) {
1385 if(bce) {
1386 term.line[y][x] = term.c.attr;
1387 memcpy(term.line[y][x].c, " ", 2);
1388 term.line[y][x].state |= GLYPH_SET;
1389 } else {
1390 term.line[y][x].state = 0;
1391 }
1392 }
1393 }
1394 }
1395
1396 void
1397 tdeletechar(int n) {
1398 int src = term.c.x + n;
1399 int dst = term.c.x;
1400 int size = term.col - src;
1401
1402 term.dirty[term.c.y] = 1;
1403
1404 if(src >= term.col) {
1405 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 0);
1406 return;
1407 }
1408
1409 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1410 size * sizeof(Glyph));
1411 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y, 0);
1412 }
1413
1414 void
1415 tinsertblank(int n) {
1416 int src = term.c.x;
1417 int dst = src + n;
1418 int size = term.col - dst;
1419
1420 term.dirty[term.c.y] = 1;
1421
1422 if(dst >= term.col) {
1423 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 0);
1424 return;
1425 }
1426
1427 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1428 size * sizeof(Glyph));
1429 tclearregion(src, term.c.y, dst - 1, term.c.y, 0);
1430 }
1431
1432 void
1433 tinsertblankline(int n) {
1434 if(term.c.y < term.top || term.c.y > term.bot)
1435 return;
1436
1437 tscrolldown(term.c.y, n);
1438 }
1439
1440 void
1441 tdeleteline(int n) {
1442 if(term.c.y < term.top || term.c.y > term.bot)
1443 return;
1444
1445 tscrollup(term.c.y, n);
1446 }
1447
1448 void
1449 tsetattr(int *attr, int l) {
1450 int i;
1451
1452 for(i = 0; i < l; i++) {
1453 switch(attr[i]) {
1454 case 0:
1455 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD \
1456 | ATTR_ITALIC | ATTR_BLINK);
1457 term.c.attr.fg = defaultfg;
1458 term.c.attr.bg = defaultbg;
1459 break;
1460 case 1:
1461 term.c.attr.mode |= ATTR_BOLD;
1462 break;
1463 case 3:
1464 term.c.attr.mode |= ATTR_ITALIC;
1465 break;
1466 case 4:
1467 term.c.attr.mode |= ATTR_UNDERLINE;
1468 break;
1469 case 5: /* slow blink */
1470 case 6: /* rapid blink */
1471 term.c.attr.mode |= ATTR_BLINK;
1472 break;
1473 case 7:
1474 term.c.attr.mode |= ATTR_REVERSE;
1475 break;
1476 case 21:
1477 case 22:
1478 term.c.attr.mode &= ~ATTR_BOLD;
1479 break;
1480 case 23:
1481 term.c.attr.mode &= ~ATTR_ITALIC;
1482 break;
1483 case 24:
1484 term.c.attr.mode &= ~ATTR_UNDERLINE;
1485 break;
1486 case 25:
1487 case 26:
1488 term.c.attr.mode &= ~ATTR_BLINK;
1489 break;
1490 case 27:
1491 term.c.attr.mode &= ~ATTR_REVERSE;
1492 break;
1493 case 38:
1494 if(i + 2 < l && attr[i + 1] == 5) {
1495 i += 2;
1496 if(BETWEEN(attr[i], 0, 255)) {
1497 term.c.attr.fg = attr[i];
1498 } else {
1499 fprintf(stderr,
1500 "erresc: bad fgcolor %d\n",
1501 attr[i]);
1502 }
1503 } else {
1504 fprintf(stderr,
1505 "erresc(38): gfx attr %d unknown\n",
1506 attr[i]);
1507 }
1508 break;
1509 case 39:
1510 term.c.attr.fg = defaultfg;
1511 break;
1512 case 48:
1513 if(i + 2 < l && attr[i + 1] == 5) {
1514 i += 2;
1515 if(BETWEEN(attr[i], 0, 255)) {
1516 term.c.attr.bg = attr[i];
1517 } else {
1518 fprintf(stderr,
1519 "erresc: bad bgcolor %d\n",
1520 attr[i]);
1521 }
1522 } else {
1523 fprintf(stderr,
1524 "erresc(48): gfx attr %d unknown\n",
1525 attr[i]);
1526 }
1527 break;
1528 case 49:
1529 term.c.attr.bg = defaultbg;
1530 break;
1531 default:
1532 if(BETWEEN(attr[i], 30, 37)) {
1533 term.c.attr.fg = attr[i] - 30;
1534 } else if(BETWEEN(attr[i], 40, 47)) {
1535 term.c.attr.bg = attr[i] - 40;
1536 } else if(BETWEEN(attr[i], 90, 97)) {
1537 term.c.attr.fg = attr[i] - 90 + 8;
1538 } else if(BETWEEN(attr[i], 100, 107)) {
1539 term.c.attr.bg = attr[i] - 100 + 8;
1540 } else {
1541 fprintf(stderr,
1542 "erresc(default): gfx attr %d unknown\n",
1543 attr[i]), csidump();
1544 }
1545 break;
1546 }
1547 }
1548 }
1549
1550 void
1551 tsetscroll(int t, int b) {
1552 int temp;
1553
1554 LIMIT(t, 0, term.row-1);
1555 LIMIT(b, 0, term.row-1);
1556 if(t > b) {
1557 temp = t;
1558 t = b;
1559 b = temp;
1560 }
1561 term.top = t;
1562 term.bot = b;
1563 }
1564
1565 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1566
1567 void
1568 tsetmode(bool priv, bool set, int *args, int narg) {
1569 int *lim, mode;
1570 bool alt;
1571
1572 for(lim = args + narg; args < lim; ++args) {
1573 if(priv) {
1574 switch(*args) {
1575 break;
1576 case 1: /* DECCKM -- Cursor key */
1577 MODBIT(term.mode, set, MODE_APPCURSOR);
1578 break;
1579 case 5: /* DECSCNM -- Reverse video */
1580 mode = term.mode;
1581 MODBIT(term.mode, set, MODE_REVERSE);
1582 if(mode != term.mode)
1583 redraw(REDRAW_TIMEOUT);
1584 break;
1585 case 6: /* DECOM -- Origin */
1586 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1587 tmoveato(0, 0);
1588 break;
1589 case 7: /* DECAWM -- Auto wrap */
1590 MODBIT(term.mode, set, MODE_WRAP);
1591 break;
1592 case 0: /* Error (IGNORED) */
1593 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1594 case 3: /* DECCOLM -- Column (IGNORED) */
1595 case 4: /* DECSCLM -- Scroll (IGNORED) */
1596 case 8: /* DECARM -- Auto repeat (IGNORED) */
1597 case 18: /* DECPFF -- Printer feed (IGNORED) */
1598 case 19: /* DECPEX -- Printer extent (IGNORED) */
1599 case 42: /* DECNRCM -- National characters (IGNORED) */
1600 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1601 break;
1602 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1603 MODBIT(term.mode, !set, MODE_HIDE);
1604 break;
1605 case 1000: /* 1000,1002: enable xterm mouse report */
1606 MODBIT(term.mode, set, MODE_MOUSEBTN);
1607 MODBIT(term.mode, 0, MODE_MOUSEMOTION);
1608 break;
1609 case 1002:
1610 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1611 MODBIT(term.mode, 0, MODE_MOUSEBTN);
1612 break;
1613 case 1006:
1614 MODBIT(term.mode, set, MODE_MOUSESGR);
1615 break;
1616 case 1049: /* = 1047 and 1048 */
1617 case 47:
1618 case 1047: {
1619 alt = IS_SET(MODE_ALTSCREEN);
1620 if(alt) {
1621 tclearregion(0, 0, term.col-1,
1622 term.row-1, 0);
1623 }
1624 if(set ^ alt) /* set is always 1 or 0 */
1625 tswapscreen();
1626 if(*args != 1049)
1627 break;
1628 }
1629 /* pass through */
1630 case 1048:
1631 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1632 break;
1633 default:
1634 fprintf(stderr,
1635 "erresc: unknown private set/reset mode %d\n",
1636 *args);
1637 break;
1638 }
1639 } else {
1640 switch(*args) {
1641 case 0: /* Error (IGNORED) */
1642 break;
1643 case 2: /* KAM -- keyboard action */
1644 MODBIT(term.mode, set, MODE_KBDLOCK);
1645 break;
1646 case 4: /* IRM -- Insertion-replacement */
1647 MODBIT(term.mode, set, MODE_INSERT);
1648 break;
1649 case 12: /* SRM -- Send/Receive */
1650 MODBIT(term.mode, !set, MODE_ECHO);
1651 break;
1652 case 20: /* LNM -- Linefeed/new line */
1653 MODBIT(term.mode, set, MODE_CRLF);
1654 break;
1655 default:
1656 fprintf(stderr,
1657 "erresc: unknown set/reset mode %d\n",
1658 *args);
1659 break;
1660 }
1661 }
1662 }
1663 }
1664 #undef MODBIT
1665
1666
1667 void
1668 csihandle(void) {
1669 switch(csiescseq.mode) {
1670 default:
1671 unknown:
1672 fprintf(stderr, "erresc: unknown csi ");
1673 csidump();
1674 /* die(""); */
1675 break;
1676 case '@': /* ICH -- Insert <n> blank char */
1677 DEFAULT(csiescseq.arg[0], 1);
1678 tinsertblank(csiescseq.arg[0]);
1679 break;
1680 case 'A': /* CUU -- Cursor <n> Up */
1681 DEFAULT(csiescseq.arg[0], 1);
1682 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1683 break;
1684 case 'B': /* CUD -- Cursor <n> Down */
1685 case 'e': /* VPR --Cursor <n> Down */
1686 DEFAULT(csiescseq.arg[0], 1);
1687 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1688 break;
1689 case 'c': /* DA -- Device Attributes */
1690 if(csiescseq.arg[0] == 0)
1691 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1692 break;
1693 case 'C': /* CUF -- Cursor <n> Forward */
1694 case 'a': /* HPR -- Cursor <n> Forward */
1695 DEFAULT(csiescseq.arg[0], 1);
1696 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1697 break;
1698 case 'D': /* CUB -- Cursor <n> Backward */
1699 DEFAULT(csiescseq.arg[0], 1);
1700 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1701 break;
1702 case 'E': /* CNL -- Cursor <n> Down and first col */
1703 DEFAULT(csiescseq.arg[0], 1);
1704 tmoveto(0, term.c.y+csiescseq.arg[0]);
1705 break;
1706 case 'F': /* CPL -- Cursor <n> Up and first col */
1707 DEFAULT(csiescseq.arg[0], 1);
1708 tmoveto(0, term.c.y-csiescseq.arg[0]);
1709 break;
1710 case 'g': /* TBC -- Tabulation clear */
1711 switch(csiescseq.arg[0]) {
1712 case 0: /* clear current tab stop */
1713 term.tabs[term.c.x] = 0;
1714 break;
1715 case 3: /* clear all the tabs */
1716 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1717 break;
1718 default:
1719 goto unknown;
1720 }
1721 break;
1722 case 'G': /* CHA -- Move to <col> */
1723 case '`': /* HPA */
1724 DEFAULT(csiescseq.arg[0], 1);
1725 tmoveto(csiescseq.arg[0]-1, term.c.y);
1726 break;
1727 case 'H': /* CUP -- Move to <row> <col> */
1728 case 'f': /* HVP */
1729 DEFAULT(csiescseq.arg[0], 1);
1730 DEFAULT(csiescseq.arg[1], 1);
1731 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1732 break;
1733 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1734 DEFAULT(csiescseq.arg[0], 1);
1735 while(csiescseq.arg[0]--)
1736 tputtab(1);
1737 break;
1738 case 'J': /* ED -- Clear screen */
1739 sel.bx = -1;
1740 switch(csiescseq.arg[0]) {
1741 case 0: /* below */
1742 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 1);
1743 if(term.c.y < term.row-1) {
1744 tclearregion(0, term.c.y+1, term.col-1,
1745 term.row-1, 1);
1746 }
1747 break;
1748 case 1: /* above */
1749 if(term.c.y > 1)
1750 tclearregion(0, 0, term.col-1, term.c.y-1, 1);
1751 tclearregion(0, term.c.y, term.c.x, term.c.y, 1);
1752 break;
1753 case 2: /* all */
1754 tclearregion(0, 0, term.col-1, term.row-1, 1);
1755 break;
1756 default:
1757 goto unknown;
1758 }
1759 break;
1760 case 'K': /* EL -- Clear line */
1761 switch(csiescseq.arg[0]) {
1762 case 0: /* right */
1763 tclearregion(term.c.x, term.c.y, term.col-1,
1764 term.c.y, 1);
1765 break;
1766 case 1: /* left */
1767 tclearregion(0, term.c.y, term.c.x, term.c.y, 1);
1768 break;
1769 case 2: /* all */
1770 tclearregion(0, term.c.y, term.col-1, term.c.y, 1);
1771 break;
1772 }
1773 break;
1774 case 'S': /* SU -- Scroll <n> line up */
1775 DEFAULT(csiescseq.arg[0], 1);
1776 tscrollup(term.top, csiescseq.arg[0]);
1777 break;
1778 case 'T': /* SD -- Scroll <n> line down */
1779 DEFAULT(csiescseq.arg[0], 1);
1780 tscrolldown(term.top, csiescseq.arg[0]);
1781 break;
1782 case 'L': /* IL -- Insert <n> blank lines */
1783 DEFAULT(csiescseq.arg[0], 1);
1784 tinsertblankline(csiescseq.arg[0]);
1785 break;
1786 case 'l': /* RM -- Reset Mode */
1787 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
1788 break;
1789 case 'M': /* DL -- Delete <n> lines */
1790 DEFAULT(csiescseq.arg[0], 1);
1791 tdeleteline(csiescseq.arg[0]);
1792 break;
1793 case 'X': /* ECH -- Erase <n> char */
1794 DEFAULT(csiescseq.arg[0], 1);
1795 tclearregion(term.c.x, term.c.y,
1796 term.c.x + csiescseq.arg[0] - 1, term.c.y, 1);
1797 break;
1798 case 'P': /* DCH -- Delete <n> char */
1799 DEFAULT(csiescseq.arg[0], 1);
1800 tdeletechar(csiescseq.arg[0]);
1801 break;
1802 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
1803 DEFAULT(csiescseq.arg[0], 1);
1804 while(csiescseq.arg[0]--)
1805 tputtab(0);
1806 break;
1807 case 'd': /* VPA -- Move to <row> */
1808 DEFAULT(csiescseq.arg[0], 1);
1809 tmoveato(term.c.x, csiescseq.arg[0]-1);
1810 break;
1811 case 'h': /* SM -- Set terminal mode */
1812 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
1813 break;
1814 case 'm': /* SGR -- Terminal attribute (color) */
1815 tsetattr(csiescseq.arg, csiescseq.narg);
1816 break;
1817 case 'r': /* DECSTBM -- Set Scrolling Region */
1818 if(csiescseq.priv) {
1819 goto unknown;
1820 } else {
1821 DEFAULT(csiescseq.arg[0], 1);
1822 DEFAULT(csiescseq.arg[1], term.row);
1823 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
1824 tmoveato(0, 0);
1825 }
1826 break;
1827 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1828 tcursor(CURSOR_SAVE);
1829 break;
1830 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1831 tcursor(CURSOR_LOAD);
1832 break;
1833 }
1834 }
1835
1836 void
1837 csidump(void) {
1838 int i;
1839 uint c;
1840
1841 printf("ESC[");
1842 for(i = 0; i < csiescseq.len; i++) {
1843 c = csiescseq.buf[i] & 0xff;
1844 if(isprint(c)) {
1845 putchar(c);
1846 } else if(c == '\n') {
1847 printf("(\\n)");
1848 } else if(c == '\r') {
1849 printf("(\\r)");
1850 } else if(c == 0x1b) {
1851 printf("(\\e)");
1852 } else {
1853 printf("(%02x)", c);
1854 }
1855 }
1856 putchar('\n');
1857 }
1858
1859 void
1860 csireset(void) {
1861 memset(&csiescseq, 0, sizeof(csiescseq));
1862 }
1863
1864 void
1865 strhandle(void) {
1866 char *p = NULL;
1867 int i, j, narg;
1868
1869 strparse();
1870 narg = strescseq.narg;
1871
1872 switch(strescseq.type) {
1873 case ']': /* OSC -- Operating System Command */
1874 switch(i = atoi(strescseq.args[0])) {
1875 case 0:
1876 case 1:
1877 case 2:
1878 if(narg > 1)
1879 xsettitle(strescseq.args[1]);
1880 break;
1881 case 4: /* color set */
1882 if(narg < 3)
1883 break;
1884 p = strescseq.args[2];
1885 /* fall through */
1886 case 104: /* color reset, here p = NULL */
1887 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
1888 if (!xsetcolorname(j, p)) {
1889 fprintf(stderr, "erresc: invalid color %s\n", p);
1890 } else {
1891 /*
1892 * TODO if defaultbg color is changed, borders
1893 * are dirty
1894 */
1895 redraw(0);
1896 }
1897 break;
1898 default:
1899 fprintf(stderr, "erresc: unknown str ");
1900 strdump();
1901 break;
1902 }
1903 break;
1904 case 'k': /* old title set compatibility */
1905 xsettitle(strescseq.args[0]);
1906 break;
1907 case 'P': /* DSC -- Device Control String */
1908 case '_': /* APC -- Application Program Command */
1909 case '^': /* PM -- Privacy Message */
1910 default:
1911 fprintf(stderr, "erresc: unknown str ");
1912 strdump();
1913 /* die(""); */
1914 break;
1915 }
1916 }
1917
1918 void
1919 strparse(void) {
1920 char *p = strescseq.buf;
1921
1922 strescseq.narg = 0;
1923 strescseq.buf[strescseq.len] = '\0';
1924 while(p && strescseq.narg < STR_ARG_SIZ)
1925 strescseq.args[strescseq.narg++] = strsep(&p, ";");
1926 }
1927
1928 void
1929 strdump(void) {
1930 int i;
1931 uint c;
1932
1933 printf("ESC%c", strescseq.type);
1934 for(i = 0; i < strescseq.len; i++) {
1935 c = strescseq.buf[i] & 0xff;
1936 if(c == '\0') {
1937 return;
1938 } else if(isprint(c)) {
1939 putchar(c);
1940 } else if(c == '\n') {
1941 printf("(\\n)");
1942 } else if(c == '\r') {
1943 printf("(\\r)");
1944 } else if(c == 0x1b) {
1945 printf("(\\e)");
1946 } else {
1947 printf("(%02x)", c);
1948 }
1949 }
1950 printf("ESC\\\n");
1951 }
1952
1953 void
1954 strreset(void) {
1955 memset(&strescseq, 0, sizeof(strescseq));
1956 }
1957
1958 void
1959 tputtab(bool forward) {
1960 uint x = term.c.x;
1961
1962 if(forward) {
1963 if(x == term.col)
1964 return;
1965 for(++x; x < term.col && !term.tabs[x]; ++x)
1966 /* nothing */ ;
1967 } else {
1968 if(x == 0)
1969 return;
1970 for(--x; x > 0 && !term.tabs[x]; --x)
1971 /* nothing */ ;
1972 }
1973 tmoveto(x, term.c.y);
1974 }
1975
1976 void
1977 techo(char *buf, int len) {
1978 for(; len > 0; buf++, len--) {
1979 char c = *buf;
1980
1981 if(c == '\033') { /* escape */
1982 tputc("^", 1);
1983 tputc("[", 1);
1984 } else if(c < '\x20') { /* control code */
1985 if(c != '\n' && c != '\r' && c != '\t') {
1986 c |= '\x40';
1987 tputc("^", 1);
1988 }
1989 tputc(&c, 1);
1990 } else {
1991 break;
1992 }
1993 }
1994 if(len)
1995 tputc(buf, len);
1996 }
1997
1998 void
1999 tputc(char *c, int len) {
2000 uchar ascii = *c;
2001 bool control = ascii < '\x20' || ascii == 0177;
2002
2003 if(iofd != -1) {
2004 if(xwrite(iofd, c, len) < 0) {
2005 fprintf(stderr, "Error writing in %s:%s\n",
2006 opt_io, strerror(errno));
2007 close(iofd);
2008 iofd = -1;
2009 }
2010 }
2011
2012 /*
2013 * STR sequences must be checked before anything else
2014 * because it can use some control codes as part of the sequence.
2015 */
2016 if(term.esc & ESC_STR) {
2017 switch(ascii) {
2018 case '\033':
2019 term.esc = ESC_START | ESC_STR_END;
2020 break;
2021 case '\a': /* backwards compatibility to xterm */
2022 term.esc = 0;
2023 strhandle();
2024 break;
2025 default:
2026 if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2027 memmove(&strescseq.buf[strescseq.len], c, len);
2028 strescseq.len += len;
2029 } else {
2030 /*
2031 * Here is a bug in terminals. If the user never sends
2032 * some code to stop the str or esc command, then st
2033 * will stop responding. But this is better than
2034 * silently failing with unknown characters. At least
2035 * then users will report back.
2036 *
2037 * In the case users ever get fixed, here is the code:
2038 */
2039 /*
2040 * term.esc = 0;
2041 * strhandle();
2042 */
2043 }
2044 }
2045 return;
2046 }
2047
2048 /*
2049 * Actions of control codes must be performed as soon they arrive
2050 * because they can be embedded inside a control sequence, and
2051 * they must not cause conflicts with sequences.
2052 */
2053 if(control) {
2054 switch(ascii) {
2055 case '\t': /* HT */
2056 tputtab(1);
2057 return;
2058 case '\b': /* BS */
2059 tmoveto(term.c.x-1, term.c.y);
2060 return;
2061 case '\r': /* CR */
2062 tmoveto(0, term.c.y);
2063 return;
2064 case '\f': /* LF */
2065 case '\v': /* VT */
2066 case '\n': /* LF */
2067 /* go to first col if the mode is set */
2068 tnewline(IS_SET(MODE_CRLF));
2069 return;
2070 case '\a': /* BEL */
2071 if(!(xw.state & WIN_FOCUSED))
2072 xseturgency(1);
2073 return;
2074 case '\033': /* ESC */
2075 csireset();
2076 term.esc = ESC_START;
2077 return;
2078 case '\016': /* SO */
2079 case '\017': /* SI */
2080 /*
2081 * Different charsets are hard to handle. Applications
2082 * should use the right alt charset escapes for the
2083 * only reason they still exist: line drawing. The
2084 * rest is incompatible history st should not support.
2085 */
2086 return;
2087 case '\032': /* SUB */
2088 case '\030': /* CAN */
2089 csireset();
2090 return;
2091 case '\005': /* ENQ (IGNORED) */
2092 case '\000': /* NUL (IGNORED) */
2093 case '\021': /* XON (IGNORED) */
2094 case '\023': /* XOFF (IGNORED) */
2095 case 0177: /* DEL (IGNORED) */
2096 return;
2097 }
2098 } else if(term.esc & ESC_START) {
2099 if(term.esc & ESC_CSI) {
2100 csiescseq.buf[csiescseq.len++] = ascii;
2101 if(BETWEEN(ascii, 0x40, 0x7E)
2102 || csiescseq.len >= \
2103 sizeof(csiescseq.buf)-1) {
2104 term.esc = 0;
2105 csiparse();
2106 csihandle();
2107 }
2108 } else if(term.esc & ESC_STR_END) {
2109 term.esc = 0;
2110 if(ascii == '\\')
2111 strhandle();
2112 } else if(term.esc & ESC_ALTCHARSET) {
2113 switch(ascii) {
2114 case '0': /* Line drawing set */
2115 term.c.attr.mode |= ATTR_GFX;
2116 break;
2117 case 'B': /* USASCII */
2118 term.c.attr.mode &= ~ATTR_GFX;
2119 break;
2120 case 'A': /* UK (IGNORED) */
2121 case '<': /* multinational charset (IGNORED) */
2122 case '5': /* Finnish (IGNORED) */
2123 case 'C': /* Finnish (IGNORED) */
2124 case 'K': /* German (IGNORED) */
2125 break;
2126 default:
2127 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2128 }
2129 term.esc = 0;
2130 } else if(term.esc & ESC_TEST) {
2131 if(ascii == '8') { /* DEC screen alignment test. */
2132 char E[UTF_SIZ] = "E";
2133 int x, y;
2134
2135 for(x = 0; x < term.col; ++x) {
2136 for(y = 0; y < term.row; ++y)
2137 tsetchar(E, &term.c.attr, x, y);
2138 }
2139 }
2140 term.esc = 0;
2141 } else {
2142 switch(ascii) {
2143 case '[':
2144 term.esc |= ESC_CSI;
2145 break;
2146 case '#':
2147 term.esc |= ESC_TEST;
2148 break;
2149 case 'P': /* DCS -- Device Control String */
2150 case '_': /* APC -- Application Program Command */
2151 case '^': /* PM -- Privacy Message */
2152 case ']': /* OSC -- Operating System Command */
2153 case 'k': /* old title set compatibility */
2154 strreset();
2155 strescseq.type = ascii;
2156 term.esc |= ESC_STR;
2157 break;
2158 case '(': /* set primary charset G0 */
2159 term.esc |= ESC_ALTCHARSET;
2160 break;
2161 case ')': /* set secondary charset G1 (IGNORED) */
2162 case '*': /* set tertiary charset G2 (IGNORED) */
2163 case '+': /* set quaternary charset G3 (IGNORED) */
2164 term.esc = 0;
2165 break;
2166 case 'D': /* IND -- Linefeed */
2167 if(term.c.y == term.bot) {
2168 tscrollup(term.top, 1);
2169 } else {
2170 tmoveto(term.c.x, term.c.y+1);
2171 }
2172 term.esc = 0;
2173 break;
2174 case 'E': /* NEL -- Next line */
2175 tnewline(1); /* always go to first col */
2176 term.esc = 0;
2177 break;
2178 case 'H': /* HTS -- Horizontal tab stop */
2179 term.tabs[term.c.x] = 1;
2180 term.esc = 0;
2181 break;
2182 case 'M': /* RI -- Reverse index */
2183 if(term.c.y == term.top) {
2184 tscrolldown(term.top, 1);
2185 } else {
2186 tmoveto(term.c.x, term.c.y-1);
2187 }
2188 term.esc = 0;
2189 break;
2190 case 'Z': /* DECID -- Identify Terminal */
2191 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2192 term.esc = 0;
2193 break;
2194 case 'c': /* RIS -- Reset to inital state */
2195 treset();
2196 term.esc = 0;
2197 xresettitle();
2198 break;
2199 case '=': /* DECPAM -- Application keypad */
2200 term.mode |= MODE_APPKEYPAD;
2201 term.esc = 0;
2202 break;
2203 case '>': /* DECPNM -- Normal keypad */
2204 term.mode &= ~MODE_APPKEYPAD;
2205 term.esc = 0;
2206 break;
2207 case '7': /* DECSC -- Save Cursor */
2208 tcursor(CURSOR_SAVE);
2209 term.esc = 0;
2210 break;
2211 case '8': /* DECRC -- Restore Cursor */
2212 tcursor(CURSOR_LOAD);
2213 term.esc = 0;
2214 break;
2215 case '\\': /* ST -- Stop */
2216 term.esc = 0;
2217 break;
2218 default:
2219 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2220 (uchar) ascii, isprint(ascii)? ascii:'.');
2221 term.esc = 0;
2222 }
2223 }
2224 /*
2225 * All characters which form part of a sequence are not
2226 * printed
2227 */
2228 return;
2229 }
2230 /*
2231 * Display control codes only if we are in graphic mode
2232 */
2233 if(control && !(term.c.attr.mode & ATTR_GFX))
2234 return;
2235 if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
2236 sel.bx = -1;
2237 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
2238 tnewline(1); /* always go to first col */
2239
2240 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col) {
2241 memmove(&term.line[term.c.y][term.c.x+1],
2242 &term.line[term.c.y][term.c.x],
2243 (term.col - term.c.x - 1) * sizeof(Glyph));
2244 }
2245
2246 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2247 if(term.c.x+1 < term.col) {
2248 tmoveto(term.c.x+1, term.c.y);
2249 } else {
2250 term.c.state |= CURSOR_WRAPNEXT;
2251 }
2252 }
2253
2254 int
2255 tresize(int col, int row) {
2256 int i, x;
2257 int minrow = MIN(row, term.row);
2258 int mincol = MIN(col, term.col);
2259 int slide = term.c.y - row + 1;
2260 bool *bp;
2261
2262 if(col < 1 || row < 1)
2263 return 0;
2264
2265 /* free unneeded rows */
2266 i = 0;
2267 if(slide > 0) {
2268 /*
2269 * slide screen to keep cursor where we expect it -
2270 * tscrollup would work here, but we can optimize to
2271 * memmove because we're freeing the earlier lines
2272 */
2273 for(/* i = 0 */; i < slide; i++) {
2274 free(term.line[i]);
2275 free(term.alt[i]);
2276 }
2277 memmove(term.line, term.line + slide, row * sizeof(Line));
2278 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2279 }
2280 for(i += row; i < term.row; i++) {
2281 free(term.line[i]);
2282 free(term.alt[i]);
2283 }
2284
2285 /* resize to new height */
2286 term.line = xrealloc(term.line, row * sizeof(Line));
2287 term.alt = xrealloc(term.alt, row * sizeof(Line));
2288 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2289 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2290
2291 /* resize each row to new width, zero-pad if needed */
2292 for(i = 0; i < minrow; i++) {
2293 term.dirty[i] = 1;
2294 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2295 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2296 for(x = mincol; x < col; x++) {
2297 term.line[i][x].state = 0;
2298 term.alt[i][x].state = 0;
2299 }
2300 }
2301
2302 /* allocate any new rows */
2303 for(/* i == minrow */; i < row; i++) {
2304 term.dirty[i] = 1;
2305 term.line[i] = xcalloc(col, sizeof(Glyph));
2306 term.alt [i] = xcalloc(col, sizeof(Glyph));
2307 }
2308 if(col > term.col) {
2309 bp = term.tabs + term.col;
2310
2311 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2312 while(--bp > term.tabs && !*bp)
2313 /* nothing */ ;
2314 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2315 *bp = 1;
2316 }
2317 /* update terminal size */
2318 term.col = col;
2319 term.row = row;
2320 /* reset scrolling region */
2321 tsetscroll(0, row-1);
2322 /* make use of the LIMIT in tmoveto */
2323 tmoveto(term.c.x, term.c.y);
2324
2325 return (slide > 0);
2326 }
2327
2328 void
2329 xresize(int col, int row) {
2330 xw.tw = MAX(1, col * xw.cw);
2331 xw.th = MAX(1, row * xw.ch);
2332
2333 XFreePixmap(xw.dpy, xw.buf);
2334 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2335 DefaultDepth(xw.dpy, xw.scr));
2336 XSetForeground(xw.dpy, dc.gc, dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg].pixel);
2337 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
2338
2339 XftDrawChange(xw.draw, xw.buf);
2340 }
2341
2342 static inline ushort
2343 sixd_to_16bit(int x) {
2344 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2345 }
2346
2347 void
2348 xloadcols(void) {
2349 int i, r, g, b;
2350 XRenderColor color = { .alpha = 0xffff };
2351
2352 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
2353 for(i = 0; i < LEN(colorname); i++) {
2354 if(!colorname[i])
2355 continue;
2356 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2357 die("Could not allocate color '%s'\n", colorname[i]);
2358 }
2359 }
2360
2361 /* load colors [16-255] ; same colors as xterm */
2362 for(i = 16, r = 0; r < 6; r++) {
2363 for(g = 0; g < 6; g++) {
2364 for(b = 0; b < 6; b++) {
2365 color.red = sixd_to_16bit(r);
2366 color.green = sixd_to_16bit(g);
2367 color.blue = sixd_to_16bit(b);
2368 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i])) {
2369 die("Could not allocate color %d\n", i);
2370 }
2371 i++;
2372 }
2373 }
2374 }
2375
2376 for(r = 0; r < 24; r++, i++) {
2377 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
2378 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color,
2379 &dc.col[i])) {
2380 die("Could not allocate color %d\n", i);
2381 }
2382 }
2383 }
2384
2385 int
2386 xsetcolorname(int x, const char *name) {
2387 XRenderColor color = { .alpha = 0xffff };
2388 Colour colour;
2389 if (x < 0 || x > LEN(colorname))
2390 return -1;
2391 if(!name) {
2392 if(16 <= x && x < 16 + 216) {
2393 int r = (x - 16) / 36, g = ((x - 16) % 36) / 6, b = (x - 16) % 6;
2394 color.red = sixd_to_16bit(r);
2395 color.green = sixd_to_16bit(g);
2396 color.blue = sixd_to_16bit(b);
2397 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2398 return 0; /* something went wrong */
2399 dc.col[x] = colour;
2400 return 1;
2401 } else if (16 + 216 <= x && x < 256) {
2402 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (x - (16 + 216));
2403 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2404 return 0; /* something went wrong */
2405 dc.col[x] = colour;
2406 return 1;
2407 } else {
2408 name = colorname[x];
2409 }
2410 }
2411 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &colour))
2412 return 0;
2413 dc.col[x] = colour;
2414 return 1;
2415 }
2416
2417 void
2418 xtermclear(int col1, int row1, int col2, int row2) {
2419 XftDrawRect(xw.draw,
2420 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2421 borderpx + col1 * xw.cw,
2422 borderpx + row1 * xw.ch,
2423 (col2-col1+1) * xw.cw,
2424 (row2-row1+1) * xw.ch);
2425 }
2426
2427 /*
2428 * Absolute coordinates.
2429 */
2430 void
2431 xclear(int x1, int y1, int x2, int y2) {
2432 XftDrawRect(xw.draw,
2433 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2434 x1, y1, x2-x1, y2-y1);
2435 }
2436
2437 void
2438 xhints(void) {
2439 XClassHint class = {opt_class ? opt_class : termname, termname};
2440 XWMHints wm = {.flags = InputHint, .input = 1};
2441 XSizeHints *sizeh = NULL;
2442
2443 sizeh = XAllocSizeHints();
2444 if(xw.isfixed == False) {
2445 sizeh->flags = PSize | PResizeInc | PBaseSize;
2446 sizeh->height = xw.h;
2447 sizeh->width = xw.w;
2448 sizeh->height_inc = xw.ch;
2449 sizeh->width_inc = xw.cw;
2450 sizeh->base_height = 2 * borderpx;
2451 sizeh->base_width = 2 * borderpx;
2452 } else {
2453 sizeh->flags = PMaxSize | PMinSize;
2454 sizeh->min_width = sizeh->max_width = xw.fw;
2455 sizeh->min_height = sizeh->max_height = xw.fh;
2456 }
2457
2458 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
2459 XFree(sizeh);
2460 }
2461
2462 int
2463 xloadfont(Font *f, FcPattern *pattern) {
2464 FcPattern *match;
2465 FcResult result;
2466
2467 match = FcFontMatch(NULL, pattern, &result);
2468 if(!match)
2469 return 1;
2470
2471 if(!(f->set = FcFontSort(0, match, FcTrue, 0, &result))) {
2472 FcPatternDestroy(match);
2473 return 1;
2474 }
2475
2476 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2477 FcPatternDestroy(match);
2478 return 1;
2479 }
2480
2481 f->pattern = FcPatternDuplicate(pattern);
2482
2483 f->ascent = f->match->ascent;
2484 f->descent = f->match->descent;
2485 f->lbearing = 0;
2486 f->rbearing = f->match->max_advance_width;
2487
2488 f->height = f->ascent + f->descent;
2489 f->width = f->lbearing + f->rbearing;
2490
2491 return 0;
2492 }
2493
2494 void
2495 xloadfonts(char *fontstr, int fontsize) {
2496 FcPattern *pattern;
2497 FcResult result;
2498 double fontval;
2499
2500 if(fontstr[0] == '-') {
2501 pattern = XftXlfdParse(fontstr, False, False);
2502 } else {
2503 pattern = FcNameParse((FcChar8 *)fontstr);
2504 }
2505
2506 if(!pattern)
2507 die("st: can't open font %s\n", fontstr);
2508
2509 if(fontsize > 0) {
2510 FcPatternDel(pattern, FC_PIXEL_SIZE);
2511 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2512 usedfontsize = fontsize;
2513 } else {
2514 result = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2515 if(result == FcResultMatch) {
2516 usedfontsize = (int)fontval;
2517 } else {
2518 /*
2519 * Default font size is 12, if none given. This is to
2520 * have a known usedfontsize value.
2521 */
2522 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
2523 usedfontsize = 12;
2524 }
2525 }
2526
2527 FcConfigSubstitute(0, pattern, FcMatchPattern);
2528 FcDefaultSubstitute(pattern);
2529
2530 if(xloadfont(&dc.font, pattern))
2531 die("st: can't open font %s\n", fontstr);
2532
2533 /* Setting character width and height. */
2534 xw.cw = dc.font.width;
2535 xw.ch = dc.font.height;
2536
2537 FcPatternDel(pattern, FC_SLANT);
2538 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
2539 if(xloadfont(&dc.ifont, pattern))
2540 die("st: can't open font %s\n", fontstr);
2541
2542 FcPatternDel(pattern, FC_WEIGHT);
2543 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
2544 if(xloadfont(&dc.ibfont, pattern))
2545 die("st: can't open font %s\n", fontstr);
2546
2547 FcPatternDel(pattern, FC_SLANT);
2548 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
2549 if(xloadfont(&dc.bfont, pattern))
2550 die("st: can't open font %s\n", fontstr);
2551
2552 FcPatternDestroy(pattern);
2553 }
2554
2555 void
2556 xunloadfonts(void) {
2557 int i, ip;
2558
2559 /*
2560 * Free the loaded fonts in the font cache. This is done backwards
2561 * from the frccur.
2562 */
2563 for(i = 0, ip = frccur; i < frclen; i++, ip--) {
2564 if(ip < 0)
2565 ip = LEN(frc) - 1;
2566 XftFontClose(xw.dpy, frc[ip].font);
2567 }
2568 frccur = -1;
2569 frclen = 0;
2570
2571 XftFontClose(xw.dpy, dc.font.match);
2572 FcPatternDestroy(dc.font.pattern);
2573 FcFontSetDestroy(dc.font.set);
2574 XftFontClose(xw.dpy, dc.bfont.match);
2575 FcPatternDestroy(dc.bfont.pattern);
2576 FcFontSetDestroy(dc.bfont.set);
2577 XftFontClose(xw.dpy, dc.ifont.match);
2578 FcPatternDestroy(dc.ifont.pattern);
2579 FcFontSetDestroy(dc.ifont.set);
2580 XftFontClose(xw.dpy, dc.ibfont.match);
2581 FcPatternDestroy(dc.ibfont.pattern);
2582 FcFontSetDestroy(dc.ibfont.set);
2583 }
2584
2585 void
2586 xzoom(const Arg *arg) {
2587 xunloadfonts();
2588 xloadfonts(usedfont, usedfontsize + arg->i);
2589 cresize(0, 0);
2590 redraw(0);
2591 }
2592
2593 void
2594 xinit(void) {
2595 XSetWindowAttributes attrs;
2596 XGCValues gcvalues;
2597 Cursor cursor;
2598 Window parent;
2599 int sw, sh;
2600
2601 if(!(xw.dpy = XOpenDisplay(NULL)))
2602 die("Can't open display\n");
2603 xw.scr = XDefaultScreen(xw.dpy);
2604 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
2605
2606 /* font */
2607 if(!FcInit())
2608 die("Could not init fontconfig.\n");
2609
2610 usedfont = (opt_font == NULL)? font : opt_font;
2611 xloadfonts(usedfont, 0);
2612
2613 /* colors */
2614 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
2615 xloadcols();
2616
2617 /* adjust fixed window geometry */
2618 if(xw.isfixed) {
2619 sw = DisplayWidth(xw.dpy, xw.scr);
2620 sh = DisplayHeight(xw.dpy, xw.scr);
2621 if(xw.fx < 0)
2622 xw.fx = sw + xw.fx - xw.fw - 1;
2623 if(xw.fy < 0)
2624 xw.fy = sh + xw.fy - xw.fh - 1;
2625
2626 xw.h = xw.fh;
2627 xw.w = xw.fw;
2628 } else {
2629 /* window - default size */
2630 xw.h = 2 * borderpx + term.row * xw.ch;
2631 xw.w = 2 * borderpx + term.col * xw.cw;
2632 xw.fx = 0;
2633 xw.fy = 0;
2634 }
2635
2636 /* Events */
2637 attrs.background_pixel = dc.col[defaultbg].pixel;
2638 attrs.border_pixel = dc.col[defaultbg].pixel;
2639 attrs.bit_gravity = NorthWestGravity;
2640 attrs.event_mask = FocusChangeMask | KeyPressMask
2641 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
2642 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
2643 attrs.colormap = xw.cmap;
2644
2645 parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
2646 XRootWindow(xw.dpy, xw.scr);
2647 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
2648 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
2649 xw.vis,
2650 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
2651 | CWColormap,
2652 &attrs);
2653
2654 memset(&gcvalues, 0, sizeof(gcvalues));
2655 gcvalues.graphics_exposures = False;
2656 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
2657 &gcvalues);
2658 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2659 DefaultDepth(xw.dpy, xw.scr));
2660 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
2661 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
2662
2663 /* Xft rendering context */
2664 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
2665
2666 /* input methods */
2667 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2668 XSetLocaleModifiers("@im=local");
2669 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2670 XSetLocaleModifiers("@im=");
2671 if((xw.xim = XOpenIM(xw.dpy,
2672 NULL, NULL, NULL)) == NULL) {
2673 die("XOpenIM failed. Could not open input"
2674 " device.\n");
2675 }
2676 }
2677 }
2678 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
2679 | XIMStatusNothing, XNClientWindow, xw.win,
2680 XNFocusWindow, xw.win, NULL);
2681 if(xw.xic == NULL)
2682 die("XCreateIC failed. Could not obtain input method.\n");
2683
2684 /* white cursor, black outline */
2685 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
2686 XDefineCursor(xw.dpy, xw.win, cursor);
2687 XRecolorCursor(xw.dpy, cursor,
2688 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
2689 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
2690
2691 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
2692 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
2693 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
2694
2695 xresettitle();
2696 XMapWindow(xw.dpy, xw.win);
2697 xhints();
2698 XSync(xw.dpy, 0);
2699 }
2700
2701 void
2702 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
2703 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
2704 width = charlen * xw.cw, xp, i;
2705 int frp, frcflags;
2706 int u8fl, u8fblen, u8cblen, doesexist;
2707 char *u8c, *u8fs;
2708 long u8char;
2709 Font *font = &dc.font;
2710 FcResult fcres;
2711 FcPattern *fcpattern, *fontpattern;
2712 FcFontSet *fcsets[] = { NULL };
2713 FcCharSet *fccharset;
2714 Colour *fg = &dc.col[base.fg], *bg = &dc.col[base.bg],
2715 *temp, revfg, revbg;
2716 XRenderColor colfg, colbg;
2717
2718 frcflags = FRC_NORMAL;
2719
2720 if(base.mode & ATTR_BOLD) {
2721 if(BETWEEN(base.fg, 0, 7)) {
2722 /* basic system colors */
2723 fg = &dc.col[base.fg + 8];
2724 } else if(BETWEEN(base.fg, 16, 195)) {
2725 /* 256 colors */
2726 fg = &dc.col[base.fg + 36];
2727 } else if(BETWEEN(base.fg, 232, 251)) {
2728 /* greyscale */
2729 fg = &dc.col[base.fg + 4];
2730 }
2731 /*
2732 * Those ranges will not be brightened:
2733 * 8 - 15 – bright system colors
2734 * 196 - 231 – highest 256 color cube
2735 * 252 - 255 – brightest colors in greyscale
2736 */
2737 font = &dc.bfont;
2738 frcflags = FRC_BOLD;
2739 }
2740
2741 if(base.mode & ATTR_ITALIC) {
2742 font = &dc.ifont;
2743 frcflags = FRC_ITALIC;
2744 }
2745 if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
2746 font = &dc.ibfont;
2747 frcflags = FRC_ITALICBOLD;
2748 }
2749
2750 if(IS_SET(MODE_REVERSE)) {
2751 if(fg == &dc.col[defaultfg]) {
2752 fg = &dc.col[defaultbg];
2753 } else {
2754 colfg.red = ~fg->color.red;
2755 colfg.green = ~fg->color.green;
2756 colfg.blue = ~fg->color.blue;
2757 colfg.alpha = fg->color.alpha;
2758 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
2759 fg = &revfg;
2760 }
2761
2762 if(bg == &dc.col[defaultbg]) {
2763 bg = &dc.col[defaultfg];
2764 } else {
2765 colbg.red = ~bg->color.red;
2766 colbg.green = ~bg->color.green;
2767 colbg.blue = ~bg->color.blue;
2768 colbg.alpha = bg->color.alpha;
2769 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &revbg);
2770 bg = &revbg;
2771 }
2772 }
2773
2774 if(base.mode & ATTR_REVERSE) {
2775 temp = fg;
2776 fg = bg;
2777 bg = temp;
2778 }
2779
2780 /* Intelligent cleaning up of the borders. */
2781 if(x == 0) {
2782 xclear(0, (y == 0)? 0 : winy, borderpx,
2783 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
2784 }
2785 if(x + charlen >= term.col) {
2786 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
2787 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
2788 }
2789 if(y == 0)
2790 xclear(winx, 0, winx + width, borderpx);
2791 if(y == term.row-1)
2792 xclear(winx, winy + xw.ch, winx + width, xw.h);
2793
2794 /* Clean up the region we want to draw to. */
2795 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
2796
2797 fcsets[0] = font->set;
2798 for(xp = winx; bytelen > 0;) {
2799 /*
2800 * Search for the range in the to be printed string of glyphs
2801 * that are in the main font. Then print that range. If
2802 * some glyph is found that is not in the font, do the
2803 * fallback dance.
2804 */
2805 u8fs = s;
2806 u8fblen = 0;
2807 u8fl = 0;
2808 for(;;) {
2809 u8c = s;
2810 u8cblen = utf8decode(s, &u8char);
2811 s += u8cblen;
2812 bytelen -= u8cblen;
2813
2814 doesexist = XftCharIndex(xw.dpy, font->match, u8char);
2815 if(!doesexist || bytelen <= 0) {
2816 if(bytelen <= 0) {
2817 if(doesexist) {
2818 u8fl++;
2819 u8fblen += u8cblen;
2820 }
2821 }
2822
2823 if(u8fl > 0) {
2824 XftDrawStringUtf8(xw.draw, fg,
2825 font->match, xp,
2826 winy + font->ascent,
2827 (FcChar8 *)u8fs,
2828 u8fblen);
2829 xp += font->width * u8fl;
2830 }
2831 break;
2832 }
2833
2834 u8fl++;
2835 u8fblen += u8cblen;
2836 }
2837 if(doesexist)
2838 break;
2839
2840 frp = frccur;
2841 /* Search the font cache. */
2842 for(i = 0; i < frclen; i++, frp--) {
2843 if(frp <= 0)
2844 frp = LEN(frc) - 1;
2845
2846 if(frc[frp].c == u8char
2847 && frc[frp].flags == frcflags) {
2848 break;
2849 }
2850 }
2851
2852 /* Nothing was found. */
2853 if(i >= frclen) {
2854 /*
2855 * Nothing was found in the cache. Now use
2856 * some dozen of Fontconfig calls to get the
2857 * font for one single character.
2858 */
2859 fcpattern = FcPatternDuplicate(font->pattern);
2860 fccharset = FcCharSetCreate();
2861
2862 FcCharSetAddChar(fccharset, u8char);
2863 FcPatternAddCharSet(fcpattern, FC_CHARSET,
2864 fccharset);
2865 FcPatternAddBool(fcpattern, FC_SCALABLE,
2866 FcTrue);
2867
2868 FcConfigSubstitute(0, fcpattern,
2869 FcMatchPattern);
2870 FcDefaultSubstitute(fcpattern);
2871
2872 fontpattern = FcFontSetMatch(0, fcsets,
2873 FcTrue, fcpattern, &fcres);
2874
2875 /*
2876 * Overwrite or create the new cache entry
2877 * entry.
2878 */
2879 frccur++;
2880 frclen++;
2881 if(frccur >= LEN(frc))
2882 frccur = 0;
2883 if(frclen > LEN(frc)) {
2884 frclen = LEN(frc);
2885 XftFontClose(xw.dpy, frc[frccur].font);
2886 }
2887
2888 frc[frccur].font = XftFontOpenPattern(xw.dpy,
2889 fontpattern);
2890 frc[frccur].c = u8char;
2891 frc[frccur].flags = frcflags;
2892
2893 FcPatternDestroy(fcpattern);
2894 FcCharSetDestroy(fccharset);
2895
2896 frp = frccur;
2897 }
2898
2899 XftDrawStringUtf8(xw.draw, fg, frc[frp].font,
2900 xp, winy + frc[frp].font->ascent,
2901 (FcChar8 *)u8c, u8cblen);
2902
2903 xp += font->width;
2904 }
2905
2906 /*
2907 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
2908 winy + font->ascent, (FcChar8 *)s, bytelen);
2909 */
2910
2911 if(base.mode & ATTR_UNDERLINE) {
2912 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
2913 width, 1);
2914 }
2915 }
2916
2917 void
2918 xdrawcursor(void) {
2919 static int oldx = 0, oldy = 0;
2920 int sl;
2921 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs, 0};
2922
2923 LIMIT(oldx, 0, term.col-1);
2924 LIMIT(oldy, 0, term.row-1);
2925
2926 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
2927 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
2928
2929 /* remove the old cursor */
2930 if(term.line[oldy][oldx].state & GLYPH_SET) {
2931 sl = utf8size(term.line[oldy][oldx].c);
2932 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
2933 oldy, 1, sl);
2934 } else {
2935 xtermclear(oldx, oldy, oldx, oldy);
2936 }
2937
2938 /* draw the new one */
2939 if(!(IS_SET(MODE_HIDE))) {
2940 if(!(xw.state & WIN_FOCUSED))
2941 g.bg = defaultucs;
2942
2943 if(IS_SET(MODE_REVERSE))
2944 g.mode |= ATTR_REVERSE, g.fg = defaultcs, g.bg = defaultfg;
2945
2946 sl = utf8size(g.c);
2947 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
2948 oldx = term.c.x, oldy = term.c.y;
2949 }
2950 }
2951
2952
2953 void
2954 xsettitle(char *p) {
2955 XTextProperty prop;
2956
2957 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
2958 &prop);
2959 XSetWMName(xw.dpy, xw.win, &prop);
2960 }
2961
2962 void
2963 xresettitle(void) {
2964 xsettitle(opt_title ? opt_title : "st");
2965 }
2966
2967 void
2968 redraw(int timeout) {
2969 struct timespec tv = {0, timeout * 1000};
2970
2971 tfulldirt();
2972 draw();
2973
2974 if(timeout > 0) {
2975 nanosleep(&tv, NULL);
2976 XSync(xw.dpy, False); /* necessary for a good tput flash */
2977 }
2978 }
2979
2980 void
2981 draw(void) {
2982 drawregion(0, 0, term.col, term.row);
2983 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
2984 xw.h, 0, 0);
2985 XSetForeground(xw.dpy, dc.gc,
2986 dc.col[IS_SET(MODE_REVERSE)?
2987 defaultfg : defaultbg].pixel);
2988 }
2989
2990 void
2991 drawregion(int x1, int y1, int x2, int y2) {
2992 int ic, ib, x, y, ox, sl;
2993 Glyph base, new;
2994 char buf[DRAW_BUF_SIZ];
2995 bool ena_sel = sel.bx != -1;
2996
2997 if(sel.alt ^ IS_SET(MODE_ALTSCREEN))
2998 ena_sel = 0;
2999
3000 if(!(xw.state & WIN_VISIBLE))
3001 return;
3002
3003 for(y = y1; y < y2; y++) {
3004 if(!term.dirty[y])
3005 continue;
3006
3007 xtermclear(0, y, term.col, y);
3008 term.dirty[y] = 0;
3009 base = term.line[y][0];
3010 ic = ib = ox = 0;
3011 for(x = x1; x < x2; x++) {
3012 new = term.line[y][x];
3013 if(ena_sel && *(new.c) && selected(x, y))
3014 new.mode ^= ATTR_REVERSE;
3015 if(ib > 0 && (!(new.state & GLYPH_SET)
3016 || ATTRCMP(base, new)
3017 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3018 xdraws(buf, base, ox, y, ic, ib);
3019 ic = ib = 0;
3020 }
3021 if(new.state & GLYPH_SET) {
3022 if(ib == 0) {
3023 ox = x;
3024 base = new;
3025 }
3026
3027 sl = utf8size(new.c);
3028 memcpy(buf+ib, new.c, sl);
3029 ib += sl;
3030 ++ic;
3031 }
3032 }
3033 if(ib > 0)
3034 xdraws(buf, base, ox, y, ic, ib);
3035 }
3036 xdrawcursor();
3037 }
3038
3039 void
3040 expose(XEvent *ev) {
3041 XExposeEvent *e = &ev->xexpose;
3042
3043 if(xw.state & WIN_REDRAW) {
3044 if(!e->count)
3045 xw.state &= ~WIN_REDRAW;
3046 }
3047 redraw(0);
3048 }
3049
3050 void
3051 visibility(XEvent *ev) {
3052 XVisibilityEvent *e = &ev->xvisibility;
3053
3054 if(e->state == VisibilityFullyObscured) {
3055 xw.state &= ~WIN_VISIBLE;
3056 } else if(!(xw.state & WIN_VISIBLE)) {
3057 /* need a full redraw for next Expose, not just a buf copy */
3058 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3059 }
3060 }
3061
3062 void
3063 unmap(XEvent *ev) {
3064 xw.state &= ~WIN_VISIBLE;
3065 }
3066
3067 void
3068 xseturgency(int add) {
3069 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3070
3071 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
3072 XSetWMHints(xw.dpy, xw.win, h);
3073 XFree(h);
3074 }
3075
3076 void
3077 focus(XEvent *ev) {
3078 XFocusChangeEvent *e = &ev->xfocus;
3079
3080 if(e->mode == NotifyGrab)
3081 return;
3082
3083 if(ev->type == FocusIn) {
3084 XSetICFocus(xw.xic);
3085 xw.state |= WIN_FOCUSED;
3086 xseturgency(0);
3087 } else {
3088 XUnsetICFocus(xw.xic);
3089 xw.state &= ~WIN_FOCUSED;
3090 }
3091 }
3092
3093 inline bool
3094 match(uint mask, uint state) {
3095 state &= ~(ignoremod);
3096
3097 if(mask == XK_NO_MOD && state)
3098 return false;
3099 if(mask != XK_ANY_MOD && mask != XK_NO_MOD && !state)
3100 return false;
3101 if((state & mask) != state)
3102 return false;
3103 return true;
3104 }
3105
3106 void
3107 numlock(const Arg *dummy) {
3108 term.numlock ^= 1;
3109 }
3110
3111 char*
3112 kmap(KeySym k, uint state) {
3113 uint mask;
3114 Key *kp;
3115 int i;
3116
3117 /* Check for mapped keys out of X11 function keys. */
3118 for(i = 0; i < LEN(mappedkeys); i++) {
3119 if(mappedkeys[i] == k)
3120 break;
3121 }
3122 if(i == LEN(mappedkeys)) {
3123 if((k & 0xFFFF) < 0xFD00)
3124 return NULL;
3125 }
3126
3127 for(kp = key; kp < key + LEN(key); kp++) {
3128 mask = kp->mask;
3129
3130 if(kp->k != k)
3131 continue;
3132
3133 if(!match(mask, state))
3134 continue;
3135
3136 if(kp->appkey > 0) {
3137 if(!IS_SET(MODE_APPKEYPAD))
3138 continue;
3139 if(term.numlock && kp->appkey == 2)
3140 continue;
3141 } else if(kp->appkey < 0 && IS_SET(MODE_APPKEYPAD)) {
3142 continue;
3143 }
3144
3145 if((kp->appcursor < 0 && IS_SET(MODE_APPCURSOR)) ||
3146 (kp->appcursor > 0
3147 && !IS_SET(MODE_APPCURSOR))) {
3148 continue;
3149 }
3150
3151 if((kp->crlf < 0 && IS_SET(MODE_CRLF)) ||
3152 (kp->crlf > 0 && !IS_SET(MODE_CRLF))) {
3153 continue;
3154 }
3155
3156 return kp->s;
3157 }
3158
3159 return NULL;
3160 }
3161
3162 void
3163 kpress(XEvent *ev) {
3164 XKeyEvent *e = &ev->xkey;
3165 KeySym ksym;
3166 char xstr[31], buf[32], *customkey, *cp = buf;
3167 int len;
3168 Status status;
3169 Shortcut *bp;
3170
3171 if(IS_SET(MODE_KBDLOCK))
3172 return;
3173
3174 len = XmbLookupString(xw.xic, e, xstr, sizeof(xstr), &ksym, &status);
3175 e->state &= ~Mod2Mask;
3176 /* 1. shortcuts */
3177 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3178 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3179 bp->func(&(bp->arg));
3180 return;
3181 }
3182 }
3183
3184 /* 2. custom keys from config.h */
3185 if((customkey = kmap(ksym, e->state))) {
3186 len = strlen(customkey);
3187 memcpy(buf, customkey, len);
3188 /* 2. hardcoded (overrides X lookup) */
3189 } else {
3190 if(len == 0)
3191 return;
3192
3193 if(len == 1 && e->state & Mod1Mask)
3194 *cp++ = '\033';
3195
3196 memcpy(cp, xstr, len);
3197 len = cp - buf + len;
3198 }
3199
3200 ttywrite(buf, len);
3201 if(IS_SET(MODE_ECHO))
3202 techo(buf, len);
3203 }
3204
3205
3206 void
3207 cmessage(XEvent *e) {
3208 /*
3209 * See xembed specs
3210 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3211 */
3212 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3213 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3214 xw.state |= WIN_FOCUSED;
3215 xseturgency(0);
3216 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3217 xw.state &= ~WIN_FOCUSED;
3218 }
3219 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3220 /* Send SIGHUP to shell */
3221 kill(pid, SIGHUP);
3222 exit(EXIT_SUCCESS);
3223 }
3224 }
3225
3226 void
3227 cresize(int width, int height) {
3228 int col, row;
3229
3230 if(width != 0)
3231 xw.w = width;
3232 if(height != 0)
3233 xw.h = height;
3234
3235 col = (xw.w - 2 * borderpx) / xw.cw;
3236 row = (xw.h - 2 * borderpx) / xw.ch;
3237
3238 tresize(col, row);
3239 xresize(col, row);
3240 ttyresize();
3241 }
3242
3243 void
3244 resize(XEvent *e) {
3245 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3246 return;
3247
3248 cresize(e->xconfigure.width, e->xconfigure.height);
3249 }
3250
3251 void
3252 run(void) {
3253 XEvent ev;
3254 fd_set rfd;
3255 int xfd = XConnectionNumber(xw.dpy), xev;
3256 struct timeval drawtimeout, *tv = NULL, now, last;
3257
3258 gettimeofday(&last, NULL);
3259
3260 for(xev = actionfps;;) {
3261 FD_ZERO(&rfd);
3262 FD_SET(cmdfd, &rfd);
3263 FD_SET(xfd, &rfd);
3264 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
3265 if(errno == EINTR)
3266 continue;
3267 die("select failed: %s\n", SERRNO);
3268 }
3269
3270 gettimeofday(&now, NULL);
3271 drawtimeout.tv_sec = 0;
3272 drawtimeout.tv_usec = (1000/xfps) * 1000;
3273 tv = &drawtimeout;
3274
3275 if(FD_ISSET(cmdfd, &rfd))
3276 ttyread();
3277
3278 if(FD_ISSET(xfd, &rfd))
3279 xev = actionfps;
3280
3281 if(TIMEDIFF(now, last) > \
3282 (xev ? (1000/xfps) : (1000/actionfps))) {
3283 while(XPending(xw.dpy)) {
3284 XNextEvent(xw.dpy, &ev);
3285 if(XFilterEvent(&ev, None))
3286 continue;
3287 if(handler[ev.type])
3288 (handler[ev.type])(&ev);
3289 }
3290
3291 draw();
3292 XFlush(xw.dpy);
3293 last = now;
3294
3295 if(xev && !FD_ISSET(xfd, &rfd))
3296 xev--;
3297 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd))
3298 tv = NULL;
3299 }
3300 }
3301 }
3302
3303 int
3304 main(int argc, char *argv[]) {
3305 int i, bitm, xr, yr;
3306 uint wr, hr;
3307
3308 xw.fw = xw.fh = xw.fx = xw.fy = 0;
3309 xw.isfixed = False;
3310
3311 for(i = 1; i < argc; i++) {
3312 switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
3313 case 'c':
3314 if(++i < argc)
3315 opt_class = argv[i];
3316 break;
3317 case 'e':
3318 /* eat all remaining arguments */
3319 if(++i < argc)
3320 opt_cmd = &argv[i];
3321 goto run;
3322 case 'f':
3323 if(++i < argc)
3324 opt_font = argv[i];
3325 break;
3326 case 'g':
3327 if(++i >= argc)
3328 break;
3329
3330 bitm = XParseGeometry(argv[i], &xr, &yr, &wr, &hr);
3331 if(bitm & XValue)
3332 xw.fx = xr;
3333 if(bitm & YValue)
3334 xw.fy = yr;
3335 if(bitm & WidthValue)
3336 xw.fw = (int)wr;
3337 if(bitm & HeightValue)
3338 xw.fh = (int)hr;
3339 if(bitm & XNegative && xw.fx == 0)
3340 xw.fx = -1;
3341 if(bitm & XNegative && xw.fy == 0)
3342 xw.fy = -1;
3343
3344 if(xw.fh != 0 && xw.fw != 0)
3345 xw.isfixed = True;
3346 break;
3347 case 'o':
3348 if(++i < argc)
3349 opt_io = argv[i];
3350 break;
3351 case 't':
3352 if(++i < argc)
3353 opt_title = argv[i];
3354 break;
3355 case 'v':
3356 default:
3357 die(USAGE);
3358 case 'w':
3359 if(++i < argc)
3360 opt_embed = argv[i];
3361 break;
3362 }
3363 }
3364
3365 run:
3366 setlocale(LC_CTYPE, "");
3367 XSetLocaleModifiers("");
3368 tnew(80, 24);
3369 xinit();
3370 ttynew();
3371 selinit();
3372 run();
3373
3374 return 0;
3375 }
3376