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[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 clippaste(const Arg *);
270 static void numlock(const Arg *);
271 static void selpaste(const Arg *);
272 static void xzoom(const Arg *);
273
274 /* Config.h for applying patches and the configuration. */
275 #include "config.h"
276
277 /* Font structure */
278 typedef struct {
279 int height;
280 int width;
281 int ascent;
282 int descent;
283 short lbearing;
284 short rbearing;
285 XftFont *match;
286 FcFontSet *set;
287 FcPattern *pattern;
288 } Font;
289
290 /* Drawing Context */
291 typedef struct {
292 Colour col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
293 Font font, bfont, ifont, ibfont;
294 GC gc;
295 } DC;
296
297 static void die(const char *, ...);
298 static void draw(void);
299 static void redraw(int);
300 static void drawregion(int, int, int, int);
301 static void execsh(void);
302 static void sigchld(int);
303 static void run(void);
304
305 static void csidump(void);
306 static void csihandle(void);
307 static void csiparse(void);
308 static void csireset(void);
309 static void strdump(void);
310 static void strhandle(void);
311 static void strparse(void);
312 static void strreset(void);
313
314 static void tclearregion(int, int, int, int, int);
315 static void tcursor(int);
316 static void tdeletechar(int);
317 static void tdeleteline(int);
318 static void tinsertblank(int);
319 static void tinsertblankline(int);
320 static void tmoveto(int, int);
321 static void tmoveato(int x, int y);
322 static void tnew(int, int);
323 static void tnewline(int);
324 static void tputtab(bool);
325 static void tputc(char *, int);
326 static void treset(void);
327 static int tresize(int, int);
328 static void tscrollup(int, int);
329 static void tscrolldown(int, int);
330 static void tsetattr(int*, int);
331 static void tsetchar(char *, Glyph *, int, int);
332 static void tsetscroll(int, int);
333 static void tswapscreen(void);
334 static void tsetdirt(int, int);
335 static void tsetmode(bool, bool, int *, int);
336 static void tfulldirt(void);
337 static void techo(char *, int);
338
339 static inline bool match(uint, uint);
340 static void ttynew(void);
341 static void ttyread(void);
342 static void ttyresize(void);
343 static void ttywrite(const char *, size_t);
344
345 static void xdraws(char *, Glyph, int, int, int, int);
346 static void xhints(void);
347 static void xclear(int, int, int, int);
348 static void xdrawcursor(void);
349 static void xinit(void);
350 static void xloadcols(void);
351 static int xsetcolorname(int, const char *);
352 static int xloadfont(Font *, FcPattern *);
353 static void xloadfonts(char *, int);
354 static void xsettitle(char *);
355 static void xresettitle(void);
356 static void xseturgency(int);
357 static void xsetsel(char*);
358 static void xtermclear(int, int, int, int);
359 static void xunloadfonts(void);
360 static void xresize(int, int);
361
362 static void expose(XEvent *);
363 static void visibility(XEvent *);
364 static void unmap(XEvent *);
365 static char *kmap(KeySym, uint);
366 static void kpress(XEvent *);
367 static void cmessage(XEvent *);
368 static void cresize(int, int);
369 static void resize(XEvent *);
370 static void focus(XEvent *);
371 static void brelease(XEvent *);
372 static void bpress(XEvent *);
373 static void bmotion(XEvent *);
374 static void selnotify(XEvent *);
375 static void selclear(XEvent *);
376 static void selrequest(XEvent *);
377
378 static void selinit(void);
379 static inline bool selected(int, int);
380 static void selcopy(void);
381 static void selscroll(int, int);
382
383 static int utf8decode(char *, long *);
384 static int utf8encode(long *, char *);
385 static int utf8size(char *);
386 static int isfullutf8(char *, int);
387
388 static ssize_t xwrite(int, char *, size_t);
389 static void *xmalloc(size_t);
390 static void *xrealloc(void *, size_t);
391 static void *xcalloc(size_t, size_t);
392
393 static void (*handler[LASTEvent])(XEvent *) = {
394 [KeyPress] = kpress,
395 [ClientMessage] = cmessage,
396 [ConfigureNotify] = resize,
397 [VisibilityNotify] = visibility,
398 [UnmapNotify] = unmap,
399 [Expose] = expose,
400 [FocusIn] = focus,
401 [FocusOut] = focus,
402 [MotionNotify] = bmotion,
403 [ButtonPress] = bpress,
404 [ButtonRelease] = brelease,
405 [SelectionClear] = selclear,
406 [SelectionNotify] = selnotify,
407 [SelectionRequest] = selrequest,
408 };
409
410 /* Globals */
411 static DC dc;
412 static XWindow xw;
413 static Term term;
414 static CSIEscape csiescseq;
415 static STREscape strescseq;
416 static int cmdfd;
417 static pid_t pid;
418 static Selection sel;
419 static int iofd = -1;
420 static char **opt_cmd = NULL;
421 static char *opt_io = NULL;
422 static char *opt_title = NULL;
423 static char *opt_embed = NULL;
424 static char *opt_class = NULL;
425 static char *opt_font = NULL;
426
427 static char *usedfont = NULL;
428 static int usedfontsize = 0;
429
430 /* Font Ring Cache */
431 enum {
432 FRC_NORMAL,
433 FRC_ITALIC,
434 FRC_BOLD,
435 FRC_ITALICBOLD
436 };
437
438 typedef struct {
439 XftFont *font;
440 long c;
441 int flags;
442 } Fontcache;
443
444 /*
445 * Fontcache is a ring buffer, with frccur as current position and frclen as
446 * the current length of used elements.
447 */
448
449 static Fontcache frc[1024];
450 static int frccur = -1, frclen = 0;
451
452 ssize_t
453 xwrite(int fd, char *s, size_t len) {
454 size_t aux = len;
455
456 while(len > 0) {
457 ssize_t r = write(fd, s, len);
458 if(r < 0)
459 return r;
460 len -= r;
461 s += r;
462 }
463 return aux;
464 }
465
466 void *
467 xmalloc(size_t len) {
468 void *p = malloc(len);
469
470 if(!p)
471 die("Out of memory\n");
472
473 return p;
474 }
475
476 void *
477 xrealloc(void *p, size_t len) {
478 if((p = realloc(p, len)) == NULL)
479 die("Out of memory\n");
480
481 return p;
482 }
483
484 void *
485 xcalloc(size_t nmemb, size_t size) {
486 void *p = calloc(nmemb, size);
487
488 if(!p)
489 die("Out of memory\n");
490
491 return p;
492 }
493
494 int
495 utf8decode(char *s, long *u) {
496 uchar c;
497 int i, n, rtn;
498
499 rtn = 1;
500 c = *s;
501 if(~c & B7) { /* 0xxxxxxx */
502 *u = c;
503 return rtn;
504 } else if((c & (B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */
505 *u = c&(B4|B3|B2|B1|B0);
506 n = 1;
507 } else if((c & (B7|B6|B5|B4)) == (B7|B6|B5)) { /* 1110xxxx */
508 *u = c&(B3|B2|B1|B0);
509 n = 2;
510 } else if((c & (B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) { /* 11110xxx */
511 *u = c & (B2|B1|B0);
512 n = 3;
513 } else {
514 goto invalid;
515 }
516
517 for(i = n, ++s; i > 0; --i, ++rtn, ++s) {
518 c = *s;
519 if((c & (B7|B6)) != B7) /* 10xxxxxx */
520 goto invalid;
521 *u <<= 6;
522 *u |= c & (B5|B4|B3|B2|B1|B0);
523 }
524
525 if((n == 1 && *u < 0x80) ||
526 (n == 2 && *u < 0x800) ||
527 (n == 3 && *u < 0x10000) ||
528 (*u >= 0xD800 && *u <= 0xDFFF)) {
529 goto invalid;
530 }
531
532 return rtn;
533 invalid:
534 *u = 0xFFFD;
535
536 return rtn;
537 }
538
539 int
540 utf8encode(long *u, char *s) {
541 uchar *sp;
542 ulong uc;
543 int i, n;
544
545 sp = (uchar *)s;
546 uc = *u;
547 if(uc < 0x80) {
548 *sp = uc; /* 0xxxxxxx */
549 return 1;
550 } else if(*u < 0x800) {
551 *sp = (uc >> 6) | (B7|B6); /* 110xxxxx */
552 n = 1;
553 } else if(uc < 0x10000) {
554 *sp = (uc >> 12) | (B7|B6|B5); /* 1110xxxx */
555 n = 2;
556 } else if(uc <= 0x10FFFF) {
557 *sp = (uc >> 18) | (B7|B6|B5|B4); /* 11110xxx */
558 n = 3;
559 } else {
560 goto invalid;
561 }
562
563 for(i=n,++sp; i>0; --i,++sp)
564 *sp = ((uc >> 6*(i-1)) & (B5|B4|B3|B2|B1|B0)) | B7; /* 10xxxxxx */
565
566 return n+1;
567 invalid:
568 /* U+FFFD */
569 *s++ = '\xEF';
570 *s++ = '\xBF';
571 *s = '\xBD';
572
573 return 3;
574 }
575
576 /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
577 UTF-8 otherwise return 0 */
578 int
579 isfullutf8(char *s, int b) {
580 uchar *c1, *c2, *c3;
581
582 c1 = (uchar *)s;
583 c2 = (uchar *)++s;
584 c3 = (uchar *)++s;
585 if(b < 1) {
586 return 0;
587 } else if((*c1&(B7|B6|B5)) == (B7|B6) && b == 1) {
588 return 0;
589 } else if((*c1&(B7|B6|B5|B4)) == (B7|B6|B5) &&
590 ((b == 1) ||
591 ((b == 2) && (*c2&(B7|B6)) == B7))) {
592 return 0;
593 } else if((*c1&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4) &&
594 ((b == 1) ||
595 ((b == 2) && (*c2&(B7|B6)) == B7) ||
596 ((b == 3) && (*c2&(B7|B6)) == B7 && (*c3&(B7|B6)) == B7))) {
597 return 0;
598 } else {
599 return 1;
600 }
601 }
602
603 int
604 utf8size(char *s) {
605 uchar c = *s;
606
607 if(~c&B7) {
608 return 1;
609 } else if((c&(B7|B6|B5)) == (B7|B6)) {
610 return 2;
611 } else if((c&(B7|B6|B5|B4)) == (B7|B6|B5)) {
612 return 3;
613 } else {
614 return 4;
615 }
616 }
617
618 void
619 selinit(void) {
620 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
621 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
622 sel.mode = 0;
623 sel.bx = -1;
624 sel.clip = NULL;
625 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
626 if(sel.xtarget == None)
627 sel.xtarget = XA_STRING;
628 }
629
630 static int
631 x2col(int x) {
632 x -= borderpx;
633 x /= xw.cw;
634
635 return LIMIT(x, 0, term.col-1);
636 }
637
638 static int
639 y2row(int y) {
640 y -= borderpx;
641 y /= xw.ch;
642
643 return LIMIT(y, 0, term.row-1);
644 }
645
646 static inline bool
647 selected(int x, int y) {
648 int bx, ex;
649
650 if(sel.ey == y && sel.by == y) {
651 bx = MIN(sel.bx, sel.ex);
652 ex = MAX(sel.bx, sel.ex);
653 return BETWEEN(x, bx, ex);
654 }
655
656 return ((sel.b.y < y && y < sel.e.y)
657 || (y == sel.e.y && x <= sel.e.x))
658 || (y == sel.b.y && x >= sel.b.x
659 && (x <= sel.e.x || sel.b.y != sel.e.y));
660 switch(sel.type) {
661 case SEL_REGULAR:
662 return ((sel.b.y < y && y < sel.e.y)
663 || (y == sel.e.y && x <= sel.e.x))
664 || (y == sel.b.y && x >= sel.b.x
665 && (x <= sel.e.x || sel.b.y != sel.e.y));
666 case SEL_RECTANGULAR:
667 return ((sel.b.y <= y && y <= sel.e.y)
668 && (sel.b.x <= x && x <= sel.e.x));
669 };
670 }
671
672 void
673 getbuttoninfo(XEvent *e) {
674 int type;
675 uint state = e->xbutton.state &~Button1Mask;
676
677 sel.alt = IS_SET(MODE_ALTSCREEN);
678
679 sel.ex = x2col(e->xbutton.x);
680 sel.ey = y2row(e->xbutton.y);
681
682 sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
683 sel.b.y = MIN(sel.by, sel.ey);
684 sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
685 sel.e.y = MAX(sel.by, sel.ey);
686
687 sel.type = SEL_REGULAR;
688 for(type = 1; type < LEN(selmasks); ++type) {
689 if(match(selmasks[type], state)) {
690 sel.type = type;
691 break;
692 }
693 }
694 }
695
696 void
697 mousereport(XEvent *e) {
698 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
699 button = e->xbutton.button, state = e->xbutton.state,
700 len;
701 char buf[40];
702 static int ob, ox, oy;
703
704 /* from urxvt */
705 if(e->xbutton.type == MotionNotify) {
706 if(!IS_SET(MODE_MOUSEMOTION) || (x == ox && y == oy))
707 return;
708 button = ob + 32;
709 ox = x, oy = y;
710 } else if(!IS_SET(MODE_MOUSESGR)
711 && (e->xbutton.type == ButtonRelease
712 || button == AnyButton)) {
713 button = 3;
714 } else {
715 button -= Button1;
716 if(button >= 3)
717 button += 64 - 3;
718 if(e->xbutton.type == ButtonPress) {
719 ob = button;
720 ox = x, oy = y;
721 }
722 }
723
724 button += (state & ShiftMask ? 4 : 0)
725 + (state & Mod4Mask ? 8 : 0)
726 + (state & ControlMask ? 16 : 0);
727
728 len = 0;
729 if(IS_SET(MODE_MOUSESGR)) {
730 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
731 button, x+1, y+1,
732 e->xbutton.type == ButtonRelease ? 'm' : 'M');
733 } else if(x < 223 && y < 223) {
734 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
735 32+button, 32+x+1, 32+y+1);
736 } else {
737 return;
738 }
739
740 ttywrite(buf, len);
741 }
742
743 void
744 bpress(XEvent *e) {
745 if(IS_SET(MODE_MOUSE)) {
746 mousereport(e);
747 } else if(e->xbutton.button == Button1) {
748 if(sel.bx != -1) {
749 sel.bx = -1;
750 tsetdirt(sel.b.y, sel.e.y);
751 draw();
752 }
753 sel.mode = 1;
754 sel.type = SEL_REGULAR;
755 sel.ex = sel.bx = x2col(e->xbutton.x);
756 sel.ey = sel.by = y2row(e->xbutton.y);
757 } else if(e->xbutton.button == Button4) {
758 ttywrite("\031", 1);
759 } else if(e->xbutton.button == Button5) {
760 ttywrite("\005", 1);
761 }
762 }
763
764 void
765 selcopy(void) {
766 char *str, *ptr, *p;
767 int x, y, bufsize, is_selected = 0, size;
768 Glyph *gp, *last;
769
770 if(sel.bx == -1) {
771 str = NULL;
772 } else {
773 bufsize = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
774 ptr = str = xmalloc(bufsize);
775
776 /* append every set & selected glyph to the selection */
777 for(y = sel.b.y; y < sel.e.y + 1; y++) {
778 is_selected = 0;
779 gp = &term.line[y][0];
780 last = gp + term.col;
781
782 while(--last >= gp && !(last->state & GLYPH_SET))
783 /* nothing */;
784
785 for(x = 0; gp <= last; x++, ++gp) {
786 if(!selected(x, y)) {
787 continue;
788 } else {
789 is_selected = 1;
790 }
791
792 p = (gp->state & GLYPH_SET) ? gp->c : " ";
793 size = utf8size(p);
794 memcpy(ptr, p, size);
795 ptr += size;
796 }
797 /* \n at the end of every selected line except for the last one */
798 if(is_selected && y < sel.e.y)
799 *ptr++ = '\n';
800 }
801 *ptr = 0;
802 }
803 xsetsel(str);
804 }
805
806 void
807 selnotify(XEvent *e) {
808 ulong nitems, ofs, rem;
809 int format;
810 uchar *data;
811 Atom type;
812
813 ofs = 0;
814 do {
815 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
816 False, AnyPropertyType, &type, &format,
817 &nitems, &rem, &data)) {
818 fprintf(stderr, "Clipboard allocation failed\n");
819 return;
820 }
821 ttywrite((const char *) data, nitems * format / 8);
822 XFree(data);
823 /* number of 32-bit chunks returned */
824 ofs += nitems * format / 32;
825 } while(rem > 0);
826 }
827
828 void
829 selpaste(const Arg *dummy) {
830 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
831 xw.win, CurrentTime);
832 }
833
834 void
835 clippaste(const Arg *dummy) {
836 Atom clipboard;
837
838 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
839 XConvertSelection(xw.dpy, clipboard, sel.xtarget, XA_PRIMARY,
840 xw.win, CurrentTime);
841 }
842
843 void
844 selclear(XEvent *e) {
845 if(sel.bx == -1)
846 return;
847 sel.bx = -1;
848 tsetdirt(sel.b.y, sel.e.y);
849 }
850
851 void
852 selrequest(XEvent *e) {
853 XSelectionRequestEvent *xsre;
854 XSelectionEvent xev;
855 Atom xa_targets, string;
856
857 xsre = (XSelectionRequestEvent *) e;
858 xev.type = SelectionNotify;
859 xev.requestor = xsre->requestor;
860 xev.selection = xsre->selection;
861 xev.target = xsre->target;
862 xev.time = xsre->time;
863 /* reject */
864 xev.property = None;
865
866 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
867 if(xsre->target == xa_targets) {
868 /* respond with the supported type */
869 string = sel.xtarget;
870 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
871 XA_ATOM, 32, PropModeReplace,
872 (uchar *) &string, 1);
873 xev.property = xsre->property;
874 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
875 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
876 xsre->target, 8, PropModeReplace,
877 (uchar *) sel.clip, strlen(sel.clip));
878 xev.property = xsre->property;
879 }
880
881 /* all done, send a notification to the listener */
882 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
883 fprintf(stderr, "Error sending SelectionNotify event\n");
884 }
885
886 void
887 xsetsel(char *str) {
888 /* register the selection for both the clipboard and the primary */
889 Atom clipboard;
890
891 free(sel.clip);
892 sel.clip = str;
893
894 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
895
896 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
897 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
898 }
899
900 void
901 brelease(XEvent *e) {
902 struct timeval now;
903
904 if(IS_SET(MODE_MOUSE)) {
905 mousereport(e);
906 return;
907 }
908
909 if(e->xbutton.button == Button2) {
910 selpaste(NULL);
911 } else if(e->xbutton.button == Button1) {
912 sel.mode = 0;
913 getbuttoninfo(e);
914 term.dirty[sel.ey] = 1;
915 if(sel.bx == sel.ex && sel.by == sel.ey) {
916 sel.bx = -1;
917 gettimeofday(&now, NULL);
918
919 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
920 /* triple click on the line */
921 sel.b.x = sel.bx = 0;
922 sel.e.x = sel.ex = term.col;
923 sel.b.y = sel.e.y = sel.ey;
924 selcopy();
925 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
926 /* double click to select word */
927 sel.bx = sel.ex;
928 while(sel.bx > 0 && term.line[sel.ey][sel.bx-1].state & GLYPH_SET &&
929 term.line[sel.ey][sel.bx-1].c[0] != ' ') {
930 sel.bx--;
931 }
932 sel.b.x = sel.bx;
933 while(sel.ex < term.col-1 && term.line[sel.ey][sel.ex+1].state & GLYPH_SET &&
934 term.line[sel.ey][sel.ex+1].c[0] != ' ') {
935 sel.ex++;
936 }
937 sel.e.x = sel.ex;
938 sel.b.y = sel.e.y = sel.ey;
939 selcopy();
940 }
941 } else {
942 selcopy();
943 }
944 }
945
946 memcpy(&sel.tclick2, &sel.tclick1, sizeof(struct timeval));
947 gettimeofday(&sel.tclick1, NULL);
948 }
949
950 void
951 bmotion(XEvent *e) {
952 int oldey, oldex, oldsby, oldsey;
953
954 if(IS_SET(MODE_MOUSE)) {
955 mousereport(e);
956 return;
957 }
958
959 if(!sel.mode)
960 return;
961
962 oldey = sel.ey;
963 oldex = sel.ex;
964 oldsby = sel.b.y;
965 oldsey = sel.e.y;
966 getbuttoninfo(e);
967
968 if(oldey != sel.ey || oldex != sel.ex) {
969 tsetdirt(MIN(sel.b.y, oldsby), MAX(sel.e.y, oldsey));
970 }
971 }
972
973 void
974 die(const char *errstr, ...) {
975 va_list ap;
976
977 va_start(ap, errstr);
978 vfprintf(stderr, errstr, ap);
979 va_end(ap);
980 exit(EXIT_FAILURE);
981 }
982
983 void
984 execsh(void) {
985 char **args;
986 char *envshell = getenv("SHELL");
987 const struct passwd *pass = getpwuid(getuid());
988 char buf[sizeof(long) * 8 + 1];
989
990 unsetenv("COLUMNS");
991 unsetenv("LINES");
992 unsetenv("TERMCAP");
993
994 if(pass) {
995 setenv("LOGNAME", pass->pw_name, 1);
996 setenv("USER", pass->pw_name, 1);
997 setenv("SHELL", pass->pw_shell, 0);
998 setenv("HOME", pass->pw_dir, 0);
999 }
1000
1001 snprintf(buf, sizeof(buf), "%lu", xw.win);
1002 setenv("WINDOWID", buf, 1);
1003
1004 signal(SIGCHLD, SIG_DFL);
1005 signal(SIGHUP, SIG_DFL);
1006 signal(SIGINT, SIG_DFL);
1007 signal(SIGQUIT, SIG_DFL);
1008 signal(SIGTERM, SIG_DFL);
1009 signal(SIGALRM, SIG_DFL);
1010
1011 DEFAULT(envshell, shell);
1012 setenv("TERM", termname, 1);
1013 args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
1014 execvp(args[0], args);
1015 exit(EXIT_FAILURE);
1016 }
1017
1018 void
1019 sigchld(int a) {
1020 int stat = 0;
1021
1022 if(waitpid(pid, &stat, 0) < 0)
1023 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
1024
1025 if(WIFEXITED(stat)) {
1026 exit(WEXITSTATUS(stat));
1027 } else {
1028 exit(EXIT_FAILURE);
1029 }
1030 }
1031
1032 void
1033 ttynew(void) {
1034 int m, s;
1035 struct winsize w = {term.row, term.col, 0, 0};
1036
1037 /* seems to work fine on linux, openbsd and freebsd */
1038 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1039 die("openpty failed: %s\n", SERRNO);
1040
1041 switch(pid = fork()) {
1042 case -1:
1043 die("fork failed\n");
1044 break;
1045 case 0:
1046 setsid(); /* create a new process group */
1047 dup2(s, STDIN_FILENO);
1048 dup2(s, STDOUT_FILENO);
1049 dup2(s, STDERR_FILENO);
1050 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1051 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
1052 close(s);
1053 close(m);
1054 execsh();
1055 break;
1056 default:
1057 close(s);
1058 cmdfd = m;
1059 signal(SIGCHLD, sigchld);
1060 if(opt_io) {
1061 iofd = (!strcmp(opt_io, "-")) ?
1062 STDOUT_FILENO :
1063 open(opt_io, O_WRONLY | O_CREAT, 0666);
1064 if(iofd < 0) {
1065 fprintf(stderr, "Error opening %s:%s\n",
1066 opt_io, strerror(errno));
1067 }
1068 }
1069 }
1070 }
1071
1072 void
1073 dump(char c) {
1074 static int col;
1075
1076 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
1077 if(++col % 10 == 0)
1078 fprintf(stderr, "\n");
1079 }
1080
1081 void
1082 ttyread(void) {
1083 static char buf[BUFSIZ];
1084 static int buflen = 0;
1085 char *ptr;
1086 char s[UTF_SIZ];
1087 int charsize; /* size of utf8 char in bytes */
1088 long utf8c;
1089 int ret;
1090
1091 /* append read bytes to unprocessed bytes */
1092 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1093 die("Couldn't read from shell: %s\n", SERRNO);
1094
1095 /* process every complete utf8 char */
1096 buflen += ret;
1097 ptr = buf;
1098 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
1099 charsize = utf8decode(ptr, &utf8c);
1100 utf8encode(&utf8c, s);
1101 tputc(s, charsize);
1102 ptr += charsize;
1103 buflen -= charsize;
1104 }
1105
1106 /* keep any uncomplete utf8 char for the next call */
1107 memmove(buf, ptr, buflen);
1108 }
1109
1110 void
1111 ttywrite(const char *s, size_t n) {
1112 if(write(cmdfd, s, n) == -1)
1113 die("write error on tty: %s\n", SERRNO);
1114 }
1115
1116 void
1117 ttyresize(void) {
1118 struct winsize w;
1119
1120 w.ws_row = term.row;
1121 w.ws_col = term.col;
1122 w.ws_xpixel = xw.tw;
1123 w.ws_ypixel = xw.th;
1124 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1125 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
1126 }
1127
1128 void
1129 tsetdirt(int top, int bot) {
1130 int i;
1131
1132 LIMIT(top, 0, term.row-1);
1133 LIMIT(bot, 0, term.row-1);
1134
1135 for(i = top; i <= bot; i++)
1136 term.dirty[i] = 1;
1137 }
1138
1139 void
1140 tfulldirt(void) {
1141 tsetdirt(0, term.row-1);
1142 }
1143
1144 void
1145 tcursor(int mode) {
1146 static TCursor c;
1147
1148 if(mode == CURSOR_SAVE) {
1149 c = term.c;
1150 } else if(mode == CURSOR_LOAD) {
1151 term.c = c;
1152 tmoveto(c.x, c.y);
1153 }
1154 }
1155
1156 void
1157 treset(void) {
1158 uint i;
1159
1160 term.c = (TCursor){{
1161 .mode = ATTR_NULL,
1162 .fg = defaultfg,
1163 .bg = defaultbg
1164 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1165
1166 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1167 for(i = tabspaces; i < term.col; i += tabspaces)
1168 term.tabs[i] = 1;
1169 term.top = 0;
1170 term.bot = term.row - 1;
1171 term.mode = MODE_WRAP;
1172
1173 tclearregion(0, 0, term.col-1, term.row-1, 0);
1174 tmoveto(0, 0);
1175 tcursor(CURSOR_SAVE);
1176 }
1177
1178 void
1179 tnew(int col, int row) {
1180 /* set screen size */
1181 term.row = row;
1182 term.col = col;
1183 term.line = xmalloc(term.row * sizeof(Line));
1184 term.alt = xmalloc(term.row * sizeof(Line));
1185 term.dirty = xmalloc(term.row * sizeof(*term.dirty));
1186 term.tabs = xmalloc(term.col * sizeof(*term.tabs));
1187
1188 for(row = 0; row < term.row; row++) {
1189 term.line[row] = xmalloc(term.col * sizeof(Glyph));
1190 term.alt [row] = xmalloc(term.col * sizeof(Glyph));
1191 term.dirty[row] = 0;
1192 }
1193
1194 term.numlock = 1;
1195 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1196 /* setup screen */
1197 treset();
1198 }
1199
1200 void
1201 tswapscreen(void) {
1202 Line *tmp = term.line;
1203
1204 term.line = term.alt;
1205 term.alt = tmp;
1206 term.mode ^= MODE_ALTSCREEN;
1207 tfulldirt();
1208 }
1209
1210 void
1211 tscrolldown(int orig, int n) {
1212 int i;
1213 Line temp;
1214
1215 LIMIT(n, 0, term.bot-orig+1);
1216
1217 tclearregion(0, term.bot-n+1, term.col-1, term.bot, 0);
1218
1219 for(i = term.bot; i >= orig+n; i--) {
1220 temp = term.line[i];
1221 term.line[i] = term.line[i-n];
1222 term.line[i-n] = temp;
1223
1224 term.dirty[i] = 1;
1225 term.dirty[i-n] = 1;
1226 }
1227
1228 selscroll(orig, n);
1229 }
1230
1231 void
1232 tscrollup(int orig, int n) {
1233 int i;
1234 Line temp;
1235 LIMIT(n, 0, term.bot-orig+1);
1236
1237 tclearregion(0, orig, term.col-1, orig+n-1, 0);
1238
1239 for(i = orig; i <= term.bot-n; i++) {
1240 temp = term.line[i];
1241 term.line[i] = term.line[i+n];
1242 term.line[i+n] = temp;
1243
1244 term.dirty[i] = 1;
1245 term.dirty[i+n] = 1;
1246 }
1247
1248 selscroll(orig, -n);
1249 }
1250
1251 void
1252 selscroll(int orig, int n) {
1253 if(sel.bx == -1)
1254 return;
1255
1256 if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
1257 if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
1258 sel.bx = -1;
1259 return;
1260 }
1261 switch(sel.type) {
1262 case SEL_REGULAR:
1263 if(sel.by < term.top) {
1264 sel.by = term.top;
1265 sel.bx = 0;
1266 }
1267 if(sel.ey > term.bot) {
1268 sel.ey = term.bot;
1269 sel.ex = term.col;
1270 }
1271 break;
1272 case SEL_RECTANGULAR:
1273 if(sel.by < term.top)
1274 sel.by = term.top;
1275 if(sel.ey > term.bot)
1276 sel.ey = term.bot;
1277 break;
1278 };
1279 sel.b.y = sel.by, sel.b.x = sel.bx;
1280 sel.e.y = sel.ey, sel.e.x = sel.ex;
1281 }
1282 }
1283
1284 void
1285 tnewline(int first_col) {
1286 int y = term.c.y;
1287
1288 if(y == term.bot) {
1289 tscrollup(term.top, 1);
1290 } else {
1291 y++;
1292 }
1293 tmoveto(first_col ? 0 : term.c.x, y);
1294 }
1295
1296 void
1297 csiparse(void) {
1298 /* int noarg = 1; */
1299 char *p = csiescseq.buf;
1300
1301 csiescseq.narg = 0;
1302 if(*p == '?')
1303 csiescseq.priv = 1, p++;
1304
1305 while(p < csiescseq.buf+csiescseq.len) {
1306 while(isdigit(*p)) {
1307 csiescseq.arg[csiescseq.narg] *= 10;
1308 csiescseq.arg[csiescseq.narg] += *p++ - '0'/*, noarg = 0 */;
1309 }
1310 if(*p == ';' && csiescseq.narg+1 < ESC_ARG_SIZ) {
1311 csiescseq.narg++, p++;
1312 } else {
1313 csiescseq.mode = *p;
1314 csiescseq.narg++;
1315
1316 return;
1317 }
1318 }
1319 }
1320
1321 /* for absolute user moves, when decom is set */
1322 void
1323 tmoveato(int x, int y) {
1324 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1325 }
1326
1327 void
1328 tmoveto(int x, int y) {
1329 int miny, maxy;
1330
1331 if(term.c.state & CURSOR_ORIGIN) {
1332 miny = term.top;
1333 maxy = term.bot;
1334 } else {
1335 miny = 0;
1336 maxy = term.row - 1;
1337 }
1338 LIMIT(x, 0, term.col-1);
1339 LIMIT(y, miny, maxy);
1340 term.c.state &= ~CURSOR_WRAPNEXT;
1341 term.c.x = x;
1342 term.c.y = y;
1343 }
1344
1345 void
1346 tsetchar(char *c, Glyph *attr, int x, int y) {
1347 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1348 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1349 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1350 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1351 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1352 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1353 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1354 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1355 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1356 };
1357
1358 /*
1359 * The table is proudly stolen from rxvt.
1360 */
1361 if(attr->mode & ATTR_GFX) {
1362 if(c[0] >= 0x41 && c[0] <= 0x7e
1363 && vt100_0[c[0] - 0x41]) {
1364 c = vt100_0[c[0] - 0x41];
1365 }
1366 }
1367
1368 term.dirty[y] = 1;
1369 term.line[y][x] = *attr;
1370 memcpy(term.line[y][x].c, c, UTF_SIZ);
1371 term.line[y][x].state |= GLYPH_SET;
1372 }
1373
1374 void
1375 tclearregion(int x1, int y1, int x2, int y2, int bce) {
1376 int x, y, temp;
1377
1378 if(x1 > x2)
1379 temp = x1, x1 = x2, x2 = temp;
1380 if(y1 > y2)
1381 temp = y1, y1 = y2, y2 = temp;
1382
1383 LIMIT(x1, 0, term.col-1);
1384 LIMIT(x2, 0, term.col-1);
1385 LIMIT(y1, 0, term.row-1);
1386 LIMIT(y2, 0, term.row-1);
1387
1388 for(y = y1; y <= y2; y++) {
1389 term.dirty[y] = 1;
1390 for(x = x1; x <= x2; x++) {
1391 if(bce) {
1392 term.line[y][x] = term.c.attr;
1393 memcpy(term.line[y][x].c, " ", 2);
1394 term.line[y][x].state |= GLYPH_SET;
1395 } else {
1396 term.line[y][x].state = 0;
1397 }
1398 }
1399 }
1400 }
1401
1402 void
1403 tdeletechar(int n) {
1404 int src = term.c.x + n;
1405 int dst = term.c.x;
1406 int size = term.col - src;
1407
1408 term.dirty[term.c.y] = 1;
1409
1410 if(src >= term.col) {
1411 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 0);
1412 return;
1413 }
1414
1415 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1416 size * sizeof(Glyph));
1417 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y, 0);
1418 }
1419
1420 void
1421 tinsertblank(int n) {
1422 int src = term.c.x;
1423 int dst = src + n;
1424 int size = term.col - dst;
1425
1426 term.dirty[term.c.y] = 1;
1427
1428 if(dst >= term.col) {
1429 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 0);
1430 return;
1431 }
1432
1433 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1434 size * sizeof(Glyph));
1435 tclearregion(src, term.c.y, dst - 1, term.c.y, 0);
1436 }
1437
1438 void
1439 tinsertblankline(int n) {
1440 if(term.c.y < term.top || term.c.y > term.bot)
1441 return;
1442
1443 tscrolldown(term.c.y, n);
1444 }
1445
1446 void
1447 tdeleteline(int n) {
1448 if(term.c.y < term.top || term.c.y > term.bot)
1449 return;
1450
1451 tscrollup(term.c.y, n);
1452 }
1453
1454 void
1455 tsetattr(int *attr, int l) {
1456 int i;
1457
1458 for(i = 0; i < l; i++) {
1459 switch(attr[i]) {
1460 case 0:
1461 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD \
1462 | ATTR_ITALIC | ATTR_BLINK);
1463 term.c.attr.fg = defaultfg;
1464 term.c.attr.bg = defaultbg;
1465 break;
1466 case 1:
1467 term.c.attr.mode |= ATTR_BOLD;
1468 break;
1469 case 3:
1470 term.c.attr.mode |= ATTR_ITALIC;
1471 break;
1472 case 4:
1473 term.c.attr.mode |= ATTR_UNDERLINE;
1474 break;
1475 case 5: /* slow blink */
1476 case 6: /* rapid blink */
1477 term.c.attr.mode |= ATTR_BLINK;
1478 break;
1479 case 7:
1480 term.c.attr.mode |= ATTR_REVERSE;
1481 break;
1482 case 21:
1483 case 22:
1484 term.c.attr.mode &= ~ATTR_BOLD;
1485 break;
1486 case 23:
1487 term.c.attr.mode &= ~ATTR_ITALIC;
1488 break;
1489 case 24:
1490 term.c.attr.mode &= ~ATTR_UNDERLINE;
1491 break;
1492 case 25:
1493 case 26:
1494 term.c.attr.mode &= ~ATTR_BLINK;
1495 break;
1496 case 27:
1497 term.c.attr.mode &= ~ATTR_REVERSE;
1498 break;
1499 case 38:
1500 if(i + 2 < l && attr[i + 1] == 5) {
1501 i += 2;
1502 if(BETWEEN(attr[i], 0, 255)) {
1503 term.c.attr.fg = attr[i];
1504 } else {
1505 fprintf(stderr,
1506 "erresc: bad fgcolor %d\n",
1507 attr[i]);
1508 }
1509 } else {
1510 fprintf(stderr,
1511 "erresc(38): gfx attr %d unknown\n",
1512 attr[i]);
1513 }
1514 break;
1515 case 39:
1516 term.c.attr.fg = defaultfg;
1517 break;
1518 case 48:
1519 if(i + 2 < l && attr[i + 1] == 5) {
1520 i += 2;
1521 if(BETWEEN(attr[i], 0, 255)) {
1522 term.c.attr.bg = attr[i];
1523 } else {
1524 fprintf(stderr,
1525 "erresc: bad bgcolor %d\n",
1526 attr[i]);
1527 }
1528 } else {
1529 fprintf(stderr,
1530 "erresc(48): gfx attr %d unknown\n",
1531 attr[i]);
1532 }
1533 break;
1534 case 49:
1535 term.c.attr.bg = defaultbg;
1536 break;
1537 default:
1538 if(BETWEEN(attr[i], 30, 37)) {
1539 term.c.attr.fg = attr[i] - 30;
1540 } else if(BETWEEN(attr[i], 40, 47)) {
1541 term.c.attr.bg = attr[i] - 40;
1542 } else if(BETWEEN(attr[i], 90, 97)) {
1543 term.c.attr.fg = attr[i] - 90 + 8;
1544 } else if(BETWEEN(attr[i], 100, 107)) {
1545 term.c.attr.bg = attr[i] - 100 + 8;
1546 } else {
1547 fprintf(stderr,
1548 "erresc(default): gfx attr %d unknown\n",
1549 attr[i]), csidump();
1550 }
1551 break;
1552 }
1553 }
1554 }
1555
1556 void
1557 tsetscroll(int t, int b) {
1558 int temp;
1559
1560 LIMIT(t, 0, term.row-1);
1561 LIMIT(b, 0, term.row-1);
1562 if(t > b) {
1563 temp = t;
1564 t = b;
1565 b = temp;
1566 }
1567 term.top = t;
1568 term.bot = b;
1569 }
1570
1571 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1572
1573 void
1574 tsetmode(bool priv, bool set, int *args, int narg) {
1575 int *lim, mode;
1576 bool alt;
1577
1578 for(lim = args + narg; args < lim; ++args) {
1579 if(priv) {
1580 switch(*args) {
1581 break;
1582 case 1: /* DECCKM -- Cursor key */
1583 MODBIT(term.mode, set, MODE_APPCURSOR);
1584 break;
1585 case 5: /* DECSCNM -- Reverse video */
1586 mode = term.mode;
1587 MODBIT(term.mode, set, MODE_REVERSE);
1588 if(mode != term.mode)
1589 redraw(REDRAW_TIMEOUT);
1590 break;
1591 case 6: /* DECOM -- Origin */
1592 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1593 tmoveato(0, 0);
1594 break;
1595 case 7: /* DECAWM -- Auto wrap */
1596 MODBIT(term.mode, set, MODE_WRAP);
1597 break;
1598 case 0: /* Error (IGNORED) */
1599 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1600 case 3: /* DECCOLM -- Column (IGNORED) */
1601 case 4: /* DECSCLM -- Scroll (IGNORED) */
1602 case 8: /* DECARM -- Auto repeat (IGNORED) */
1603 case 18: /* DECPFF -- Printer feed (IGNORED) */
1604 case 19: /* DECPEX -- Printer extent (IGNORED) */
1605 case 42: /* DECNRCM -- National characters (IGNORED) */
1606 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1607 break;
1608 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1609 MODBIT(term.mode, !set, MODE_HIDE);
1610 break;
1611 case 1000: /* 1000,1002: enable xterm mouse report */
1612 MODBIT(term.mode, set, MODE_MOUSEBTN);
1613 MODBIT(term.mode, 0, MODE_MOUSEMOTION);
1614 break;
1615 case 1002:
1616 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1617 MODBIT(term.mode, 0, MODE_MOUSEBTN);
1618 break;
1619 case 1006:
1620 MODBIT(term.mode, set, MODE_MOUSESGR);
1621 break;
1622 case 1049: /* = 1047 and 1048 */
1623 case 47:
1624 case 1047: {
1625 alt = IS_SET(MODE_ALTSCREEN);
1626 if(alt) {
1627 tclearregion(0, 0, term.col-1,
1628 term.row-1, 0);
1629 }
1630 if(set ^ alt) /* set is always 1 or 0 */
1631 tswapscreen();
1632 if(*args != 1049)
1633 break;
1634 }
1635 /* pass through */
1636 case 1048:
1637 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1638 break;
1639 default:
1640 fprintf(stderr,
1641 "erresc: unknown private set/reset mode %d\n",
1642 *args);
1643 break;
1644 }
1645 } else {
1646 switch(*args) {
1647 case 0: /* Error (IGNORED) */
1648 break;
1649 case 2: /* KAM -- keyboard action */
1650 MODBIT(term.mode, set, MODE_KBDLOCK);
1651 break;
1652 case 4: /* IRM -- Insertion-replacement */
1653 MODBIT(term.mode, set, MODE_INSERT);
1654 break;
1655 case 12: /* SRM -- Send/Receive */
1656 MODBIT(term.mode, !set, MODE_ECHO);
1657 break;
1658 case 20: /* LNM -- Linefeed/new line */
1659 MODBIT(term.mode, set, MODE_CRLF);
1660 break;
1661 default:
1662 fprintf(stderr,
1663 "erresc: unknown set/reset mode %d\n",
1664 *args);
1665 break;
1666 }
1667 }
1668 }
1669 }
1670 #undef MODBIT
1671
1672
1673 void
1674 csihandle(void) {
1675 switch(csiescseq.mode) {
1676 default:
1677 unknown:
1678 fprintf(stderr, "erresc: unknown csi ");
1679 csidump();
1680 /* die(""); */
1681 break;
1682 case '@': /* ICH -- Insert <n> blank char */
1683 DEFAULT(csiescseq.arg[0], 1);
1684 tinsertblank(csiescseq.arg[0]);
1685 break;
1686 case 'A': /* CUU -- Cursor <n> Up */
1687 DEFAULT(csiescseq.arg[0], 1);
1688 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1689 break;
1690 case 'B': /* CUD -- Cursor <n> Down */
1691 case 'e': /* VPR --Cursor <n> Down */
1692 DEFAULT(csiescseq.arg[0], 1);
1693 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1694 break;
1695 case 'c': /* DA -- Device Attributes */
1696 if(csiescseq.arg[0] == 0)
1697 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1698 break;
1699 case 'C': /* CUF -- Cursor <n> Forward */
1700 case 'a': /* HPR -- Cursor <n> Forward */
1701 DEFAULT(csiescseq.arg[0], 1);
1702 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1703 break;
1704 case 'D': /* CUB -- Cursor <n> Backward */
1705 DEFAULT(csiescseq.arg[0], 1);
1706 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1707 break;
1708 case 'E': /* CNL -- Cursor <n> Down and first col */
1709 DEFAULT(csiescseq.arg[0], 1);
1710 tmoveto(0, term.c.y+csiescseq.arg[0]);
1711 break;
1712 case 'F': /* CPL -- Cursor <n> Up and first col */
1713 DEFAULT(csiescseq.arg[0], 1);
1714 tmoveto(0, term.c.y-csiescseq.arg[0]);
1715 break;
1716 case 'g': /* TBC -- Tabulation clear */
1717 switch(csiescseq.arg[0]) {
1718 case 0: /* clear current tab stop */
1719 term.tabs[term.c.x] = 0;
1720 break;
1721 case 3: /* clear all the tabs */
1722 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1723 break;
1724 default:
1725 goto unknown;
1726 }
1727 break;
1728 case 'G': /* CHA -- Move to <col> */
1729 case '`': /* HPA */
1730 DEFAULT(csiescseq.arg[0], 1);
1731 tmoveto(csiescseq.arg[0]-1, term.c.y);
1732 break;
1733 case 'H': /* CUP -- Move to <row> <col> */
1734 case 'f': /* HVP */
1735 DEFAULT(csiescseq.arg[0], 1);
1736 DEFAULT(csiescseq.arg[1], 1);
1737 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1738 break;
1739 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1740 DEFAULT(csiescseq.arg[0], 1);
1741 while(csiescseq.arg[0]--)
1742 tputtab(1);
1743 break;
1744 case 'J': /* ED -- Clear screen */
1745 sel.bx = -1;
1746 switch(csiescseq.arg[0]) {
1747 case 0: /* below */
1748 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 1);
1749 if(term.c.y < term.row-1) {
1750 tclearregion(0, term.c.y+1, term.col-1,
1751 term.row-1, 1);
1752 }
1753 break;
1754 case 1: /* above */
1755 if(term.c.y > 1)
1756 tclearregion(0, 0, term.col-1, term.c.y-1, 1);
1757 tclearregion(0, term.c.y, term.c.x, term.c.y, 1);
1758 break;
1759 case 2: /* all */
1760 tclearregion(0, 0, term.col-1, term.row-1, 1);
1761 break;
1762 default:
1763 goto unknown;
1764 }
1765 break;
1766 case 'K': /* EL -- Clear line */
1767 switch(csiescseq.arg[0]) {
1768 case 0: /* right */
1769 tclearregion(term.c.x, term.c.y, term.col-1,
1770 term.c.y, 1);
1771 break;
1772 case 1: /* left */
1773 tclearregion(0, term.c.y, term.c.x, term.c.y, 1);
1774 break;
1775 case 2: /* all */
1776 tclearregion(0, term.c.y, term.col-1, term.c.y, 1);
1777 break;
1778 }
1779 break;
1780 case 'S': /* SU -- Scroll <n> line up */
1781 DEFAULT(csiescseq.arg[0], 1);
1782 tscrollup(term.top, csiescseq.arg[0]);
1783 break;
1784 case 'T': /* SD -- Scroll <n> line down */
1785 DEFAULT(csiescseq.arg[0], 1);
1786 tscrolldown(term.top, csiescseq.arg[0]);
1787 break;
1788 case 'L': /* IL -- Insert <n> blank lines */
1789 DEFAULT(csiescseq.arg[0], 1);
1790 tinsertblankline(csiescseq.arg[0]);
1791 break;
1792 case 'l': /* RM -- Reset Mode */
1793 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
1794 break;
1795 case 'M': /* DL -- Delete <n> lines */
1796 DEFAULT(csiescseq.arg[0], 1);
1797 tdeleteline(csiescseq.arg[0]);
1798 break;
1799 case 'X': /* ECH -- Erase <n> char */
1800 DEFAULT(csiescseq.arg[0], 1);
1801 tclearregion(term.c.x, term.c.y,
1802 term.c.x + csiescseq.arg[0] - 1, term.c.y, 1);
1803 break;
1804 case 'P': /* DCH -- Delete <n> char */
1805 DEFAULT(csiescseq.arg[0], 1);
1806 tdeletechar(csiescseq.arg[0]);
1807 break;
1808 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
1809 DEFAULT(csiescseq.arg[0], 1);
1810 while(csiescseq.arg[0]--)
1811 tputtab(0);
1812 break;
1813 case 'd': /* VPA -- Move to <row> */
1814 DEFAULT(csiescseq.arg[0], 1);
1815 tmoveato(term.c.x, csiescseq.arg[0]-1);
1816 break;
1817 case 'h': /* SM -- Set terminal mode */
1818 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
1819 break;
1820 case 'm': /* SGR -- Terminal attribute (color) */
1821 tsetattr(csiescseq.arg, csiescseq.narg);
1822 break;
1823 case 'r': /* DECSTBM -- Set Scrolling Region */
1824 if(csiescseq.priv) {
1825 goto unknown;
1826 } else {
1827 DEFAULT(csiescseq.arg[0], 1);
1828 DEFAULT(csiescseq.arg[1], term.row);
1829 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
1830 tmoveato(0, 0);
1831 }
1832 break;
1833 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1834 tcursor(CURSOR_SAVE);
1835 break;
1836 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1837 tcursor(CURSOR_LOAD);
1838 break;
1839 }
1840 }
1841
1842 void
1843 csidump(void) {
1844 int i;
1845 uint c;
1846
1847 printf("ESC[");
1848 for(i = 0; i < csiescseq.len; i++) {
1849 c = csiescseq.buf[i] & 0xff;
1850 if(isprint(c)) {
1851 putchar(c);
1852 } else if(c == '\n') {
1853 printf("(\\n)");
1854 } else if(c == '\r') {
1855 printf("(\\r)");
1856 } else if(c == 0x1b) {
1857 printf("(\\e)");
1858 } else {
1859 printf("(%02x)", c);
1860 }
1861 }
1862 putchar('\n');
1863 }
1864
1865 void
1866 csireset(void) {
1867 memset(&csiescseq, 0, sizeof(csiescseq));
1868 }
1869
1870 void
1871 strhandle(void) {
1872 char *p = NULL;
1873 int i, j, narg;
1874
1875 strparse();
1876 narg = strescseq.narg;
1877
1878 switch(strescseq.type) {
1879 case ']': /* OSC -- Operating System Command */
1880 switch(i = atoi(strescseq.args[0])) {
1881 case 0:
1882 case 1:
1883 case 2:
1884 if(narg > 1)
1885 xsettitle(strescseq.args[1]);
1886 break;
1887 case 4: /* color set */
1888 if(narg < 3)
1889 break;
1890 p = strescseq.args[2];
1891 /* fall through */
1892 case 104: /* color reset, here p = NULL */
1893 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
1894 if (!xsetcolorname(j, p)) {
1895 fprintf(stderr, "erresc: invalid color %s\n", p);
1896 } else {
1897 /*
1898 * TODO if defaultbg color is changed, borders
1899 * are dirty
1900 */
1901 redraw(0);
1902 }
1903 break;
1904 default:
1905 fprintf(stderr, "erresc: unknown str ");
1906 strdump();
1907 break;
1908 }
1909 break;
1910 case 'k': /* old title set compatibility */
1911 xsettitle(strescseq.args[0]);
1912 break;
1913 case 'P': /* DSC -- Device Control String */
1914 case '_': /* APC -- Application Program Command */
1915 case '^': /* PM -- Privacy Message */
1916 default:
1917 fprintf(stderr, "erresc: unknown str ");
1918 strdump();
1919 /* die(""); */
1920 break;
1921 }
1922 }
1923
1924 void
1925 strparse(void) {
1926 /*
1927 * TODO: Implement parsing like for CSI when required.
1928 * Format: ESC type cmd ';' arg0 [';' argn] ESC \
1929 */
1930 int narg = 0;
1931 char *start = strescseq.buf, *end = start + strescseq.len;
1932 strescseq.args[0] = start;
1933 while(start < end && narg < LEN(strescseq.args)) {
1934 start = memchr(start, ';', end - start);
1935 if(!start)
1936 break;
1937 *start++ = '\0';
1938 if(start < end) {
1939 strescseq.args[++narg] = start;
1940 }
1941 }
1942 strescseq.narg = narg + 1;
1943 }
1944
1945 void
1946 strdump(void) {
1947 int i;
1948 uint c;
1949
1950 printf("ESC%c", strescseq.type);
1951 for(i = 0; i < strescseq.len; i++) {
1952 c = strescseq.buf[i] & 0xff;
1953 if(isprint(c)) {
1954 putchar(c);
1955 } else if(c == '\n') {
1956 printf("(\\n)");
1957 } else if(c == '\r') {
1958 printf("(\\r)");
1959 } else if(c == 0x1b) {
1960 printf("(\\e)");
1961 } else {
1962 printf("(%02x)", c);
1963 }
1964 }
1965 printf("ESC\\\n");
1966 }
1967
1968 void
1969 strreset(void) {
1970 memset(&strescseq, 0, sizeof(strescseq));
1971 }
1972
1973 void
1974 tputtab(bool forward) {
1975 uint x = term.c.x;
1976
1977 if(forward) {
1978 if(x == term.col)
1979 return;
1980 for(++x; x < term.col && !term.tabs[x]; ++x)
1981 /* nothing */ ;
1982 } else {
1983 if(x == 0)
1984 return;
1985 for(--x; x > 0 && !term.tabs[x]; --x)
1986 /* nothing */ ;
1987 }
1988 tmoveto(x, term.c.y);
1989 }
1990
1991 void
1992 techo(char *buf, int len) {
1993 for(; len > 0; buf++, len--) {
1994 char c = *buf;
1995
1996 if(c == '\033') { /* escape */
1997 tputc("^", 1);
1998 tputc("[", 1);
1999 } else if(c < '\x20') { /* control code */
2000 if(c != '\n' && c != '\r' && c != '\t') {
2001 c |= '\x40';
2002 tputc("^", 1);
2003 }
2004 tputc(&c, 1);
2005 } else {
2006 break;
2007 }
2008 }
2009 if(len)
2010 tputc(buf, len);
2011 }
2012
2013 void
2014 tputc(char *c, int len) {
2015 uchar ascii = *c;
2016 bool control = ascii < '\x20' || ascii == 0177;
2017
2018 if(iofd != -1) {
2019 if(xwrite(iofd, c, len) < 0) {
2020 fprintf(stderr, "Error writing in %s:%s\n",
2021 opt_io, strerror(errno));
2022 close(iofd);
2023 iofd = -1;
2024 }
2025 }
2026
2027 /*
2028 * STR sequences must be checked before anything else
2029 * because it can use some control codes as part of the sequence.
2030 */
2031 if(term.esc & ESC_STR) {
2032 switch(ascii) {
2033 case '\033':
2034 term.esc = ESC_START | ESC_STR_END;
2035 break;
2036 case '\a': /* backwards compatibility to xterm */
2037 term.esc = 0;
2038 strhandle();
2039 break;
2040 default:
2041 if(strescseq.len + len < sizeof(strescseq.buf)) {
2042 memmove(&strescseq.buf[strescseq.len], c, len);
2043 strescseq.len += len;
2044 } else {
2045 /*
2046 * Here is a bug in terminals. If the user never sends
2047 * some code to stop the str or esc command, then st
2048 * will stop responding. But this is better than
2049 * silently failing with unknown characters. At least
2050 * then users will report back.
2051 *
2052 * In the case users ever get fixed, here is the code:
2053 */
2054 /*
2055 * term.esc = 0;
2056 * strhandle();
2057 */
2058 }
2059 }
2060 return;
2061 }
2062
2063 /*
2064 * Actions of control codes must be performed as soon they arrive
2065 * because they can be embedded inside a control sequence, and
2066 * they must not cause conflicts with sequences.
2067 */
2068 if(control) {
2069 switch(ascii) {
2070 case '\t': /* HT */
2071 tputtab(1);
2072 return;
2073 case '\b': /* BS */
2074 tmoveto(term.c.x-1, term.c.y);
2075 return;
2076 case '\r': /* CR */
2077 tmoveto(0, term.c.y);
2078 return;
2079 case '\f': /* LF */
2080 case '\v': /* VT */
2081 case '\n': /* LF */
2082 /* go to first col if the mode is set */
2083 tnewline(IS_SET(MODE_CRLF));
2084 return;
2085 case '\a': /* BEL */
2086 if(!(xw.state & WIN_FOCUSED))
2087 xseturgency(1);
2088 return;
2089 case '\033': /* ESC */
2090 csireset();
2091 term.esc = ESC_START;
2092 return;
2093 case '\016': /* SO */
2094 case '\017': /* SI */
2095 /*
2096 * Different charsets are hard to handle. Applications
2097 * should use the right alt charset escapes for the
2098 * only reason they still exist: line drawing. The
2099 * rest is incompatible history st should not support.
2100 */
2101 return;
2102 case '\032': /* SUB */
2103 case '\030': /* CAN */
2104 csireset();
2105 return;
2106 case '\005': /* ENQ (IGNORED) */
2107 case '\000': /* NUL (IGNORED) */
2108 case '\021': /* XON (IGNORED) */
2109 case '\023': /* XOFF (IGNORED) */
2110 case 0177: /* DEL (IGNORED) */
2111 return;
2112 }
2113 } else if(term.esc & ESC_START) {
2114 if(term.esc & ESC_CSI) {
2115 csiescseq.buf[csiescseq.len++] = ascii;
2116 if(BETWEEN(ascii, 0x40, 0x7E)
2117 || csiescseq.len >= ESC_BUF_SIZ) {
2118 term.esc = 0;
2119 csiparse(), csihandle();
2120 }
2121 } else if(term.esc & ESC_STR_END) {
2122 term.esc = 0;
2123 if(ascii == '\\')
2124 strhandle();
2125 } else if(term.esc & ESC_ALTCHARSET) {
2126 switch(ascii) {
2127 case '0': /* Line drawing set */
2128 term.c.attr.mode |= ATTR_GFX;
2129 break;
2130 case 'B': /* USASCII */
2131 term.c.attr.mode &= ~ATTR_GFX;
2132 break;
2133 case 'A': /* UK (IGNORED) */
2134 case '<': /* multinational charset (IGNORED) */
2135 case '5': /* Finnish (IGNORED) */
2136 case 'C': /* Finnish (IGNORED) */
2137 case 'K': /* German (IGNORED) */
2138 break;
2139 default:
2140 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2141 }
2142 term.esc = 0;
2143 } else if(term.esc & ESC_TEST) {
2144 if(ascii == '8') { /* DEC screen alignment test. */
2145 char E[UTF_SIZ] = "E";
2146 int x, y;
2147
2148 for(x = 0; x < term.col; ++x) {
2149 for(y = 0; y < term.row; ++y)
2150 tsetchar(E, &term.c.attr, x, y);
2151 }
2152 }
2153 term.esc = 0;
2154 } else {
2155 switch(ascii) {
2156 case '[':
2157 term.esc |= ESC_CSI;
2158 break;
2159 case '#':
2160 term.esc |= ESC_TEST;
2161 break;
2162 case 'P': /* DCS -- Device Control String */
2163 case '_': /* APC -- Application Program Command */
2164 case '^': /* PM -- Privacy Message */
2165 case ']': /* OSC -- Operating System Command */
2166 case 'k': /* old title set compatibility */
2167 strreset();
2168 strescseq.type = ascii;
2169 term.esc |= ESC_STR;
2170 break;
2171 case '(': /* set primary charset G0 */
2172 term.esc |= ESC_ALTCHARSET;
2173 break;
2174 case ')': /* set secondary charset G1 (IGNORED) */
2175 case '*': /* set tertiary charset G2 (IGNORED) */
2176 case '+': /* set quaternary charset G3 (IGNORED) */
2177 term.esc = 0;
2178 break;
2179 case 'D': /* IND -- Linefeed */
2180 if(term.c.y == term.bot) {
2181 tscrollup(term.top, 1);
2182 } else {
2183 tmoveto(term.c.x, term.c.y+1);
2184 }
2185 term.esc = 0;
2186 break;
2187 case 'E': /* NEL -- Next line */
2188 tnewline(1); /* always go to first col */
2189 term.esc = 0;
2190 break;
2191 case 'H': /* HTS -- Horizontal tab stop */
2192 term.tabs[term.c.x] = 1;
2193 term.esc = 0;
2194 break;
2195 case 'M': /* RI -- Reverse index */
2196 if(term.c.y == term.top) {
2197 tscrolldown(term.top, 1);
2198 } else {
2199 tmoveto(term.c.x, term.c.y-1);
2200 }
2201 term.esc = 0;
2202 break;
2203 case 'Z': /* DECID -- Identify Terminal */
2204 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2205 term.esc = 0;
2206 break;
2207 case 'c': /* RIS -- Reset to inital state */
2208 treset();
2209 term.esc = 0;
2210 xresettitle();
2211 break;
2212 case '=': /* DECPAM -- Application keypad */
2213 term.mode |= MODE_APPKEYPAD;
2214 term.esc = 0;
2215 break;
2216 case '>': /* DECPNM -- Normal keypad */
2217 term.mode &= ~MODE_APPKEYPAD;
2218 term.esc = 0;
2219 break;
2220 case '7': /* DECSC -- Save Cursor */
2221 tcursor(CURSOR_SAVE);
2222 term.esc = 0;
2223 break;
2224 case '8': /* DECRC -- Restore Cursor */
2225 tcursor(CURSOR_LOAD);
2226 term.esc = 0;
2227 break;
2228 case '\\': /* ST -- Stop */
2229 term.esc = 0;
2230 break;
2231 default:
2232 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2233 (uchar) ascii, isprint(ascii)? ascii:'.');
2234 term.esc = 0;
2235 }
2236 }
2237 /*
2238 * All characters which form part of a sequence are not
2239 * printed
2240 */
2241 return;
2242 }
2243 /*
2244 * Display control codes only if we are in graphic mode
2245 */
2246 if(control && !(term.c.attr.mode & ATTR_GFX))
2247 return;
2248 if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
2249 sel.bx = -1;
2250 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
2251 tnewline(1); /* always go to first col */
2252
2253 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col) {
2254 memmove(&term.line[term.c.y][term.c.x+1],
2255 &term.line[term.c.y][term.c.x],
2256 (term.col - term.c.x - 1) * sizeof(Glyph));
2257 }
2258
2259 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2260 if(term.c.x+1 < term.col) {
2261 tmoveto(term.c.x+1, term.c.y);
2262 } else {
2263 term.c.state |= CURSOR_WRAPNEXT;
2264 }
2265 }
2266
2267 int
2268 tresize(int col, int row) {
2269 int i, x;
2270 int minrow = MIN(row, term.row);
2271 int mincol = MIN(col, term.col);
2272 int slide = term.c.y - row + 1;
2273 bool *bp;
2274
2275 if(col < 1 || row < 1)
2276 return 0;
2277
2278 /* free unneeded rows */
2279 i = 0;
2280 if(slide > 0) {
2281 /*
2282 * slide screen to keep cursor where we expect it -
2283 * tscrollup would work here, but we can optimize to
2284 * memmove because we're freeing the earlier lines
2285 */
2286 for(/* i = 0 */; i < slide; i++) {
2287 free(term.line[i]);
2288 free(term.alt[i]);
2289 }
2290 memmove(term.line, term.line + slide, row * sizeof(Line));
2291 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2292 }
2293 for(i += row; i < term.row; i++) {
2294 free(term.line[i]);
2295 free(term.alt[i]);
2296 }
2297
2298 /* resize to new height */
2299 term.line = xrealloc(term.line, row * sizeof(Line));
2300 term.alt = xrealloc(term.alt, row * sizeof(Line));
2301 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2302 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2303
2304 /* resize each row to new width, zero-pad if needed */
2305 for(i = 0; i < minrow; i++) {
2306 term.dirty[i] = 1;
2307 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2308 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2309 for(x = mincol; x < col; x++) {
2310 term.line[i][x].state = 0;
2311 term.alt[i][x].state = 0;
2312 }
2313 }
2314
2315 /* allocate any new rows */
2316 for(/* i == minrow */; i < row; i++) {
2317 term.dirty[i] = 1;
2318 term.line[i] = xcalloc(col, sizeof(Glyph));
2319 term.alt [i] = xcalloc(col, sizeof(Glyph));
2320 }
2321 if(col > term.col) {
2322 bp = term.tabs + term.col;
2323
2324 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2325 while(--bp > term.tabs && !*bp)
2326 /* nothing */ ;
2327 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2328 *bp = 1;
2329 }
2330 /* update terminal size */
2331 term.col = col;
2332 term.row = row;
2333 /* reset scrolling region */
2334 tsetscroll(0, row-1);
2335 /* make use of the LIMIT in tmoveto */
2336 tmoveto(term.c.x, term.c.y);
2337
2338 return (slide > 0);
2339 }
2340
2341 void
2342 xresize(int col, int row) {
2343 xw.tw = MAX(1, col * xw.cw);
2344 xw.th = MAX(1, row * xw.ch);
2345
2346 XFreePixmap(xw.dpy, xw.buf);
2347 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2348 DefaultDepth(xw.dpy, xw.scr));
2349 XSetForeground(xw.dpy, dc.gc, dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg].pixel);
2350 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
2351
2352 XftDrawChange(xw.draw, xw.buf);
2353 }
2354
2355 static inline ushort
2356 sixd_to_16bit(int x) {
2357 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2358 }
2359
2360 void
2361 xloadcols(void) {
2362 int i, r, g, b;
2363 XRenderColor color = { .alpha = 0xffff };
2364
2365 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
2366 for(i = 0; i < LEN(colorname); i++) {
2367 if(!colorname[i])
2368 continue;
2369 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2370 die("Could not allocate color '%s'\n", colorname[i]);
2371 }
2372 }
2373
2374 /* load colors [16-255] ; same colors as xterm */
2375 for(i = 16, r = 0; r < 6; r++) {
2376 for(g = 0; g < 6; g++) {
2377 for(b = 0; b < 6; b++) {
2378 color.red = sixd_to_16bit(r);
2379 color.green = sixd_to_16bit(g);
2380 color.blue = sixd_to_16bit(b);
2381 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i])) {
2382 die("Could not allocate color %d\n", i);
2383 }
2384 i++;
2385 }
2386 }
2387 }
2388
2389 for(r = 0; r < 24; r++, i++) {
2390 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
2391 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color,
2392 &dc.col[i])) {
2393 die("Could not allocate color %d\n", i);
2394 }
2395 }
2396 }
2397
2398 int
2399 xsetcolorname(int x, const char *name) {
2400 XRenderColor color = { .alpha = 0xffff };
2401 Colour colour;
2402 if (x < 0 || x > LEN(colorname))
2403 return -1;
2404 if(!name) {
2405 if(16 <= x && x < 16 + 216) {
2406 int r = (x - 16) / 36, g = ((x - 16) % 36) / 6, b = (x - 16) % 6;
2407 color.red = sixd_to_16bit(r);
2408 color.green = sixd_to_16bit(g);
2409 color.blue = sixd_to_16bit(b);
2410 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2411 return 0; /* something went wrong */
2412 dc.col[x] = colour;
2413 return 1;
2414 } else if (16 + 216 <= x && x < 256) {
2415 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (x - (16 + 216));
2416 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2417 return 0; /* something went wrong */
2418 dc.col[x] = colour;
2419 return 1;
2420 } else {
2421 name = colorname[x];
2422 }
2423 }
2424 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &colour))
2425 return 0;
2426 dc.col[x] = colour;
2427 return 1;
2428 }
2429
2430 void
2431 xtermclear(int col1, int row1, int col2, int row2) {
2432 XftDrawRect(xw.draw,
2433 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2434 borderpx + col1 * xw.cw,
2435 borderpx + row1 * xw.ch,
2436 (col2-col1+1) * xw.cw,
2437 (row2-row1+1) * xw.ch);
2438 }
2439
2440 /*
2441 * Absolute coordinates.
2442 */
2443 void
2444 xclear(int x1, int y1, int x2, int y2) {
2445 XftDrawRect(xw.draw,
2446 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2447 x1, y1, x2-x1, y2-y1);
2448 }
2449
2450 void
2451 xhints(void) {
2452 XClassHint class = {opt_class ? opt_class : termname, termname};
2453 XWMHints wm = {.flags = InputHint, .input = 1};
2454 XSizeHints *sizeh = NULL;
2455
2456 sizeh = XAllocSizeHints();
2457 if(xw.isfixed == False) {
2458 sizeh->flags = PSize | PResizeInc | PBaseSize;
2459 sizeh->height = xw.h;
2460 sizeh->width = xw.w;
2461 sizeh->height_inc = xw.ch;
2462 sizeh->width_inc = xw.cw;
2463 sizeh->base_height = 2 * borderpx;
2464 sizeh->base_width = 2 * borderpx;
2465 } else {
2466 sizeh->flags = PMaxSize | PMinSize;
2467 sizeh->min_width = sizeh->max_width = xw.fw;
2468 sizeh->min_height = sizeh->max_height = xw.fh;
2469 }
2470
2471 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
2472 XFree(sizeh);
2473 }
2474
2475 int
2476 xloadfont(Font *f, FcPattern *pattern) {
2477 FcPattern *match;
2478 FcResult result;
2479
2480 match = FcFontMatch(NULL, pattern, &result);
2481 if(!match)
2482 return 1;
2483
2484 if(!(f->set = FcFontSort(0, match, FcTrue, 0, &result))) {
2485 FcPatternDestroy(match);
2486 return 1;
2487 }
2488
2489 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2490 FcPatternDestroy(match);
2491 return 1;
2492 }
2493
2494 f->pattern = FcPatternDuplicate(pattern);
2495
2496 f->ascent = f->match->ascent;
2497 f->descent = f->match->descent;
2498 f->lbearing = 0;
2499 f->rbearing = f->match->max_advance_width;
2500
2501 f->height = f->match->height;
2502 f->width = f->lbearing + f->rbearing;
2503
2504 return 0;
2505 }
2506
2507 void
2508 xloadfonts(char *fontstr, int fontsize) {
2509 FcPattern *pattern;
2510 FcResult result;
2511 double fontval;
2512
2513 if(fontstr[0] == '-') {
2514 pattern = XftXlfdParse(fontstr, False, False);
2515 } else {
2516 pattern = FcNameParse((FcChar8 *)fontstr);
2517 }
2518
2519 if(!pattern)
2520 die("st: can't open font %s\n", fontstr);
2521
2522 if(fontsize > 0) {
2523 FcPatternDel(pattern, FC_PIXEL_SIZE);
2524 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2525 usedfontsize = fontsize;
2526 } else {
2527 result = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2528 if(result == FcResultMatch) {
2529 usedfontsize = (int)fontval;
2530 } else {
2531 /*
2532 * Default font size is 12, if none given. This is to
2533 * have a known usedfontsize value.
2534 */
2535 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
2536 usedfontsize = 12;
2537 }
2538 }
2539
2540 FcConfigSubstitute(0, pattern, FcMatchPattern);
2541 FcDefaultSubstitute(pattern);
2542
2543 if(xloadfont(&dc.font, pattern))
2544 die("st: can't open font %s\n", fontstr);
2545
2546 /* Setting character width and height. */
2547 xw.cw = dc.font.width;
2548 xw.ch = dc.font.height;
2549
2550 FcPatternDel(pattern, FC_SLANT);
2551 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
2552 if(xloadfont(&dc.ifont, pattern))
2553 die("st: can't open font %s\n", fontstr);
2554
2555 FcPatternDel(pattern, FC_WEIGHT);
2556 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
2557 if(xloadfont(&dc.ibfont, pattern))
2558 die("st: can't open font %s\n", fontstr);
2559
2560 FcPatternDel(pattern, FC_SLANT);
2561 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
2562 if(xloadfont(&dc.bfont, pattern))
2563 die("st: can't open font %s\n", fontstr);
2564
2565 FcPatternDestroy(pattern);
2566 }
2567
2568 void
2569 xunloadfonts(void) {
2570 int i, ip;
2571
2572 /*
2573 * Free the loaded fonts in the font cache. This is done backwards
2574 * from the frccur.
2575 */
2576 for(i = 0, ip = frccur; i < frclen; i++, ip--) {
2577 if(ip < 0)
2578 ip = LEN(frc) - 1;
2579 XftFontClose(xw.dpy, frc[ip].font);
2580 }
2581 frccur = -1;
2582 frclen = 0;
2583
2584 XftFontClose(xw.dpy, dc.font.match);
2585 FcPatternDestroy(dc.font.pattern);
2586 FcFontSetDestroy(dc.font.set);
2587 XftFontClose(xw.dpy, dc.bfont.match);
2588 FcPatternDestroy(dc.bfont.pattern);
2589 FcFontSetDestroy(dc.bfont.set);
2590 XftFontClose(xw.dpy, dc.ifont.match);
2591 FcPatternDestroy(dc.ifont.pattern);
2592 FcFontSetDestroy(dc.ifont.set);
2593 XftFontClose(xw.dpy, dc.ibfont.match);
2594 FcPatternDestroy(dc.ibfont.pattern);
2595 FcFontSetDestroy(dc.ibfont.set);
2596 }
2597
2598 void
2599 xzoom(const Arg *arg) {
2600 xunloadfonts();
2601 xloadfonts(usedfont, usedfontsize + arg->i);
2602 cresize(0, 0);
2603 redraw(0);
2604 }
2605
2606 void
2607 xinit(void) {
2608 XSetWindowAttributes attrs;
2609 XGCValues gcvalues;
2610 Cursor cursor;
2611 Window parent;
2612 int sw, sh;
2613
2614 if(!(xw.dpy = XOpenDisplay(NULL)))
2615 die("Can't open display\n");
2616 xw.scr = XDefaultScreen(xw.dpy);
2617 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
2618
2619 /* font */
2620 if(!FcInit())
2621 die("Could not init fontconfig.\n");
2622
2623 usedfont = (opt_font == NULL)? font : opt_font;
2624 xloadfonts(usedfont, 0);
2625
2626 /* colors */
2627 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
2628 xloadcols();
2629
2630 /* adjust fixed window geometry */
2631 if(xw.isfixed) {
2632 sw = DisplayWidth(xw.dpy, xw.scr);
2633 sh = DisplayHeight(xw.dpy, xw.scr);
2634 if(xw.fx < 0)
2635 xw.fx = sw + xw.fx - xw.fw - 1;
2636 if(xw.fy < 0)
2637 xw.fy = sh + xw.fy - xw.fh - 1;
2638
2639 xw.h = xw.fh;
2640 xw.w = xw.fw;
2641 } else {
2642 /* window - default size */
2643 xw.h = 2 * borderpx + term.row * xw.ch;
2644 xw.w = 2 * borderpx + term.col * xw.cw;
2645 xw.fx = 0;
2646 xw.fy = 0;
2647 }
2648
2649 /* Events */
2650 attrs.background_pixel = dc.col[defaultbg].pixel;
2651 attrs.border_pixel = dc.col[defaultbg].pixel;
2652 attrs.bit_gravity = NorthWestGravity;
2653 attrs.event_mask = FocusChangeMask | KeyPressMask
2654 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
2655 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
2656 attrs.colormap = xw.cmap;
2657
2658 parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
2659 XRootWindow(xw.dpy, xw.scr);
2660 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
2661 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
2662 xw.vis,
2663 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
2664 | CWColormap,
2665 &attrs);
2666
2667 memset(&gcvalues, 0, sizeof(gcvalues));
2668 gcvalues.graphics_exposures = False;
2669 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
2670 &gcvalues);
2671 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2672 DefaultDepth(xw.dpy, xw.scr));
2673 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
2674 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
2675
2676 /* Xft rendering context */
2677 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
2678
2679 /* input methods */
2680 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2681 XSetLocaleModifiers("@im=local");
2682 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2683 XSetLocaleModifiers("@im=");
2684 if((xw.xim = XOpenIM(xw.dpy,
2685 NULL, NULL, NULL)) == NULL) {
2686 die("XOpenIM failed. Could not open input"
2687 " device.\n");
2688 }
2689 }
2690 }
2691 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
2692 | XIMStatusNothing, XNClientWindow, xw.win,
2693 XNFocusWindow, xw.win, NULL);
2694 if(xw.xic == NULL)
2695 die("XCreateIC failed. Could not obtain input method.\n");
2696
2697 /* white cursor, black outline */
2698 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
2699 XDefineCursor(xw.dpy, xw.win, cursor);
2700 XRecolorCursor(xw.dpy, cursor,
2701 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
2702 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
2703
2704 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
2705 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
2706 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
2707
2708 xresettitle();
2709 XMapWindow(xw.dpy, xw.win);
2710 xhints();
2711 XSync(xw.dpy, 0);
2712 }
2713
2714 void
2715 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
2716 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
2717 width = charlen * xw.cw, xp, i;
2718 int frp, frcflags;
2719 int u8fl, u8fblen, u8cblen, doesexist;
2720 char *u8c, *u8fs;
2721 long u8char;
2722 Font *font = &dc.font;
2723 FcResult fcres;
2724 FcPattern *fcpattern, *fontpattern;
2725 FcFontSet *fcsets[] = { NULL };
2726 FcCharSet *fccharset;
2727 Colour *fg = &dc.col[base.fg], *bg = &dc.col[base.bg],
2728 *temp, revfg, revbg;
2729 XRenderColor colfg, colbg;
2730
2731 frcflags = FRC_NORMAL;
2732
2733 if(base.mode & ATTR_BOLD) {
2734 if(BETWEEN(base.fg, 0, 7)) {
2735 /* basic system colors */
2736 fg = &dc.col[base.fg + 8];
2737 } else if(BETWEEN(base.fg, 16, 195)) {
2738 /* 256 colors */
2739 fg = &dc.col[base.fg + 36];
2740 } else if(BETWEEN(base.fg, 232, 251)) {
2741 /* greyscale */
2742 fg = &dc.col[base.fg + 4];
2743 }
2744 /*
2745 * Those ranges will not be brightened:
2746 * 8 - 15 – bright system colors
2747 * 196 - 231 – highest 256 color cube
2748 * 252 - 255 – brightest colors in greyscale
2749 */
2750 font = &dc.bfont;
2751 frcflags = FRC_BOLD;
2752 }
2753
2754 if(base.mode & ATTR_ITALIC) {
2755 font = &dc.ifont;
2756 frcflags = FRC_ITALIC;
2757 }
2758 if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
2759 font = &dc.ibfont;
2760 frcflags = FRC_ITALICBOLD;
2761 }
2762
2763 if(IS_SET(MODE_REVERSE)) {
2764 if(fg == &dc.col[defaultfg]) {
2765 fg = &dc.col[defaultbg];
2766 } else {
2767 colfg.red = ~fg->color.red;
2768 colfg.green = ~fg->color.green;
2769 colfg.blue = ~fg->color.blue;
2770 colfg.alpha = fg->color.alpha;
2771 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
2772 fg = &revfg;
2773 }
2774
2775 if(bg == &dc.col[defaultbg]) {
2776 bg = &dc.col[defaultfg];
2777 } else {
2778 colbg.red = ~bg->color.red;
2779 colbg.green = ~bg->color.green;
2780 colbg.blue = ~bg->color.blue;
2781 colbg.alpha = bg->color.alpha;
2782 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &revbg);
2783 bg = &revbg;
2784 }
2785 }
2786
2787 if(base.mode & ATTR_REVERSE) {
2788 temp = fg;
2789 fg = bg;
2790 bg = temp;
2791 }
2792
2793 /* Intelligent cleaning up of the borders. */
2794 if(x == 0) {
2795 xclear(0, (y == 0)? 0 : winy, borderpx,
2796 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
2797 }
2798 if(x + charlen >= term.col) {
2799 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
2800 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
2801 }
2802 if(y == 0)
2803 xclear(winx, 0, winx + width, borderpx);
2804 if(y == term.row-1)
2805 xclear(winx, winy + xw.ch, winx + width, xw.h);
2806
2807 /* Clean up the region we want to draw to. */
2808 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
2809
2810 fcsets[0] = font->set;
2811 for(xp = winx; bytelen > 0;) {
2812 /*
2813 * Search for the range in the to be printed string of glyphs
2814 * that are in the main font. Then print that range. If
2815 * some glyph is found that is not in the font, do the
2816 * fallback dance.
2817 */
2818 u8fs = s;
2819 u8fblen = 0;
2820 u8fl = 0;
2821 for(;;) {
2822 u8c = s;
2823 u8cblen = utf8decode(s, &u8char);
2824 s += u8cblen;
2825 bytelen -= u8cblen;
2826
2827 doesexist = XftCharIndex(xw.dpy, font->match, u8char);
2828 if(!doesexist || bytelen <= 0) {
2829 if(bytelen <= 0) {
2830 if(doesexist) {
2831 u8fl++;
2832 u8fblen += u8cblen;
2833 }
2834 }
2835
2836 if(u8fl > 0) {
2837 XftDrawStringUtf8(xw.draw, fg,
2838 font->match, xp,
2839 winy + font->ascent,
2840 (FcChar8 *)u8fs,
2841 u8fblen);
2842 xp += font->width * u8fl;
2843 }
2844 break;
2845 }
2846
2847 u8fl++;
2848 u8fblen += u8cblen;
2849 }
2850 if(doesexist)
2851 break;
2852
2853 frp = frccur;
2854 /* Search the font cache. */
2855 for(i = 0; i < frclen; i++, frp--) {
2856 if(frp <= 0)
2857 frp = LEN(frc) - 1;
2858
2859 if(frc[frp].c == u8char
2860 && frc[frp].flags == frcflags) {
2861 break;
2862 }
2863 }
2864
2865 /* Nothing was found. */
2866 if(i >= frclen) {
2867 /*
2868 * Nothing was found in the cache. Now use
2869 * some dozen of Fontconfig calls to get the
2870 * font for one single character.
2871 */
2872 fcpattern = FcPatternDuplicate(font->pattern);
2873 fccharset = FcCharSetCreate();
2874
2875 FcCharSetAddChar(fccharset, u8char);
2876 FcPatternAddCharSet(fcpattern, FC_CHARSET,
2877 fccharset);
2878 FcPatternAddBool(fcpattern, FC_SCALABLE,
2879 FcTrue);
2880
2881 FcConfigSubstitute(0, fcpattern,
2882 FcMatchPattern);
2883 FcDefaultSubstitute(fcpattern);
2884
2885 fontpattern = FcFontSetMatch(0, fcsets,
2886 FcTrue, fcpattern, &fcres);
2887
2888 /*
2889 * Overwrite or create the new cache entry
2890 * entry.
2891 */
2892 frccur++;
2893 frclen++;
2894 if(frccur >= LEN(frc))
2895 frccur = 0;
2896 if(frclen > LEN(frc)) {
2897 frclen = LEN(frc);
2898 XftFontClose(xw.dpy, frc[frccur].font);
2899 }
2900
2901 frc[frccur].font = XftFontOpenPattern(xw.dpy,
2902 fontpattern);
2903 frc[frccur].c = u8char;
2904 frc[frccur].flags = frcflags;
2905
2906 FcPatternDestroy(fcpattern);
2907 FcCharSetDestroy(fccharset);
2908
2909 frp = frccur;
2910 }
2911
2912 XftDrawStringUtf8(xw.draw, fg, frc[frp].font,
2913 xp, winy + frc[frp].font->ascent,
2914 (FcChar8 *)u8c, u8cblen);
2915
2916 xp += font->width;
2917 }
2918
2919 /*
2920 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
2921 winy + font->ascent, (FcChar8 *)s, bytelen);
2922 */
2923
2924 if(base.mode & ATTR_UNDERLINE) {
2925 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
2926 width, 1);
2927 }
2928 }
2929
2930 void
2931 xdrawcursor(void) {
2932 static int oldx = 0, oldy = 0;
2933 int sl;
2934 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs, 0};
2935
2936 LIMIT(oldx, 0, term.col-1);
2937 LIMIT(oldy, 0, term.row-1);
2938
2939 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
2940 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
2941
2942 /* remove the old cursor */
2943 if(term.line[oldy][oldx].state & GLYPH_SET) {
2944 sl = utf8size(term.line[oldy][oldx].c);
2945 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
2946 oldy, 1, sl);
2947 } else {
2948 xtermclear(oldx, oldy, oldx, oldy);
2949 }
2950
2951 /* draw the new one */
2952 if(!(IS_SET(MODE_HIDE))) {
2953 if(!(xw.state & WIN_FOCUSED))
2954 g.bg = defaultucs;
2955
2956 if(IS_SET(MODE_REVERSE))
2957 g.mode |= ATTR_REVERSE, g.fg = defaultcs, g.bg = defaultfg;
2958
2959 sl = utf8size(g.c);
2960 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
2961 oldx = term.c.x, oldy = term.c.y;
2962 }
2963 }
2964
2965
2966 void
2967 xsettitle(char *p) {
2968 XTextProperty prop;
2969
2970 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
2971 &prop);
2972 XSetWMName(xw.dpy, xw.win, &prop);
2973 }
2974
2975 void
2976 xresettitle(void) {
2977 xsettitle(opt_title ? opt_title : "st");
2978 }
2979
2980 void
2981 redraw(int timeout) {
2982 struct timespec tv = {0, timeout * 1000};
2983
2984 tfulldirt();
2985 draw();
2986
2987 if(timeout > 0) {
2988 nanosleep(&tv, NULL);
2989 XSync(xw.dpy, False); /* necessary for a good tput flash */
2990 }
2991 }
2992
2993 void
2994 draw(void) {
2995 drawregion(0, 0, term.col, term.row);
2996 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
2997 xw.h, 0, 0);
2998 XSetForeground(xw.dpy, dc.gc,
2999 dc.col[IS_SET(MODE_REVERSE)?
3000 defaultfg : defaultbg].pixel);
3001 }
3002
3003 void
3004 drawregion(int x1, int y1, int x2, int y2) {
3005 int ic, ib, x, y, ox, sl;
3006 Glyph base, new;
3007 char buf[DRAW_BUF_SIZ];
3008 bool ena_sel = sel.bx != -1;
3009
3010 if(sel.alt ^ IS_SET(MODE_ALTSCREEN))
3011 ena_sel = 0;
3012
3013 if(!(xw.state & WIN_VISIBLE))
3014 return;
3015
3016 for(y = y1; y < y2; y++) {
3017 if(!term.dirty[y])
3018 continue;
3019
3020 xtermclear(0, y, term.col, y);
3021 term.dirty[y] = 0;
3022 base = term.line[y][0];
3023 ic = ib = ox = 0;
3024 for(x = x1; x < x2; x++) {
3025 new = term.line[y][x];
3026 if(ena_sel && *(new.c) && selected(x, y))
3027 new.mode ^= ATTR_REVERSE;
3028 if(ib > 0 && (!(new.state & GLYPH_SET)
3029 || ATTRCMP(base, new)
3030 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3031 xdraws(buf, base, ox, y, ic, ib);
3032 ic = ib = 0;
3033 }
3034 if(new.state & GLYPH_SET) {
3035 if(ib == 0) {
3036 ox = x;
3037 base = new;
3038 }
3039
3040 sl = utf8size(new.c);
3041 memcpy(buf+ib, new.c, sl);
3042 ib += sl;
3043 ++ic;
3044 }
3045 }
3046 if(ib > 0)
3047 xdraws(buf, base, ox, y, ic, ib);
3048 }
3049 xdrawcursor();
3050 }
3051
3052 void
3053 expose(XEvent *ev) {
3054 XExposeEvent *e = &ev->xexpose;
3055
3056 if(xw.state & WIN_REDRAW) {
3057 if(!e->count)
3058 xw.state &= ~WIN_REDRAW;
3059 }
3060 redraw(0);
3061 }
3062
3063 void
3064 visibility(XEvent *ev) {
3065 XVisibilityEvent *e = &ev->xvisibility;
3066
3067 if(e->state == VisibilityFullyObscured) {
3068 xw.state &= ~WIN_VISIBLE;
3069 } else if(!(xw.state & WIN_VISIBLE)) {
3070 /* need a full redraw for next Expose, not just a buf copy */
3071 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3072 }
3073 }
3074
3075 void
3076 unmap(XEvent *ev) {
3077 xw.state &= ~WIN_VISIBLE;
3078 }
3079
3080 void
3081 xseturgency(int add) {
3082 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3083
3084 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
3085 XSetWMHints(xw.dpy, xw.win, h);
3086 XFree(h);
3087 }
3088
3089 void
3090 focus(XEvent *ev) {
3091 XFocusChangeEvent *e = &ev->xfocus;
3092
3093 if(e->mode == NotifyGrab)
3094 return;
3095
3096 if(ev->type == FocusIn) {
3097 XSetICFocus(xw.xic);
3098 xw.state |= WIN_FOCUSED;
3099 xseturgency(0);
3100 } else {
3101 XUnsetICFocus(xw.xic);
3102 xw.state &= ~WIN_FOCUSED;
3103 }
3104 }
3105
3106 inline bool
3107 match(uint mask, uint state) {
3108 state &= ~(ignoremod);
3109
3110 if(mask == XK_NO_MOD && state)
3111 return false;
3112 if(mask != XK_ANY_MOD && mask != XK_NO_MOD && !state)
3113 return false;
3114 if((state & mask) != state)
3115 return false;
3116 return true;
3117 }
3118
3119 void
3120 numlock(const Arg *dummy) {
3121 term.numlock ^= 1;
3122 }
3123
3124 char*
3125 kmap(KeySym k, uint state) {
3126 uint mask;
3127 Key *kp;
3128 int i;
3129
3130 /* Check for mapped keys out of X11 function keys. */
3131 for(i = 0; i < LEN(mappedkeys); i++) {
3132 if(mappedkeys[i] == k)
3133 break;
3134 }
3135 if(i == LEN(mappedkeys)) {
3136 if((k & 0xFFFF) < 0xFD00)
3137 return NULL;
3138 }
3139
3140 for(kp = key; kp < key + LEN(key); kp++) {
3141 mask = kp->mask;
3142
3143 if(kp->k != k)
3144 continue;
3145
3146 if(!match(mask, state))
3147 continue;
3148
3149 if(kp->appkey > 0) {
3150 if(!IS_SET(MODE_APPKEYPAD))
3151 continue;
3152 if(term.numlock && kp->appkey == 2)
3153 continue;
3154 } else if(kp->appkey < 0 && IS_SET(MODE_APPKEYPAD)) {
3155 continue;
3156 }
3157
3158 if((kp->appcursor < 0 && IS_SET(MODE_APPCURSOR)) ||
3159 (kp->appcursor > 0
3160 && !IS_SET(MODE_APPCURSOR))) {
3161 continue;
3162 }
3163
3164 if((kp->crlf < 0 && IS_SET(MODE_CRLF)) ||
3165 (kp->crlf > 0 && !IS_SET(MODE_CRLF))) {
3166 continue;
3167 }
3168
3169 return kp->s;
3170 }
3171
3172 return NULL;
3173 }
3174
3175 void
3176 kpress(XEvent *ev) {
3177 XKeyEvent *e = &ev->xkey;
3178 KeySym ksym;
3179 char xstr[31], buf[32], *customkey, *cp = buf;
3180 int len;
3181 Status status;
3182 Shortcut *bp;
3183
3184 if(IS_SET(MODE_KBDLOCK))
3185 return;
3186
3187 len = XmbLookupString(xw.xic, e, xstr, sizeof(xstr), &ksym, &status);
3188 e->state &= ~Mod2Mask;
3189 /* 1. shortcuts */
3190 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3191 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3192 bp->func(&(bp->arg));
3193 return;
3194 }
3195 }
3196
3197 /* 2. custom keys from config.h */
3198 if((customkey = kmap(ksym, e->state))) {
3199 len = strlen(customkey);
3200 memcpy(buf, customkey, len);
3201 /* 2. hardcoded (overrides X lookup) */
3202 } else {
3203 if(len == 0)
3204 return;
3205
3206 if(len == 1 && e->state & Mod1Mask)
3207 *cp++ = '\033';
3208
3209 memcpy(cp, xstr, len);
3210 len = cp - buf + len;
3211 }
3212
3213 ttywrite(buf, len);
3214 if(IS_SET(MODE_ECHO))
3215 techo(buf, len);
3216 }
3217
3218
3219 void
3220 cmessage(XEvent *e) {
3221 /*
3222 * See xembed specs
3223 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3224 */
3225 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3226 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3227 xw.state |= WIN_FOCUSED;
3228 xseturgency(0);
3229 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3230 xw.state &= ~WIN_FOCUSED;
3231 }
3232 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3233 /* Send SIGHUP to shell */
3234 kill(pid, SIGHUP);
3235 exit(EXIT_SUCCESS);
3236 }
3237 }
3238
3239 void
3240 cresize(int width, int height) {
3241 int col, row;
3242
3243 if(width != 0)
3244 xw.w = width;
3245 if(height != 0)
3246 xw.h = height;
3247
3248 col = (xw.w - 2 * borderpx) / xw.cw;
3249 row = (xw.h - 2 * borderpx) / xw.ch;
3250
3251 tresize(col, row);
3252 xresize(col, row);
3253 ttyresize();
3254 }
3255
3256 void
3257 resize(XEvent *e) {
3258 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3259 return;
3260
3261 cresize(e->xconfigure.width, e->xconfigure.height);
3262 }
3263
3264 void
3265 run(void) {
3266 XEvent ev;
3267 fd_set rfd;
3268 int xfd = XConnectionNumber(xw.dpy), xev;
3269 struct timeval drawtimeout, *tv = NULL, now, last;
3270
3271 gettimeofday(&last, NULL);
3272
3273 for(xev = actionfps;;) {
3274 FD_ZERO(&rfd);
3275 FD_SET(cmdfd, &rfd);
3276 FD_SET(xfd, &rfd);
3277 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
3278 if(errno == EINTR)
3279 continue;
3280 die("select failed: %s\n", SERRNO);
3281 }
3282
3283 gettimeofday(&now, NULL);
3284 drawtimeout.tv_sec = 0;
3285 drawtimeout.tv_usec = (1000/xfps) * 1000;
3286 tv = &drawtimeout;
3287
3288 if(FD_ISSET(cmdfd, &rfd))
3289 ttyread();
3290
3291 if(FD_ISSET(xfd, &rfd))
3292 xev = actionfps;
3293
3294 if(TIMEDIFF(now, last) > \
3295 (xev ? (1000/xfps) : (1000/actionfps))) {
3296 while(XPending(xw.dpy)) {
3297 XNextEvent(xw.dpy, &ev);
3298 if(XFilterEvent(&ev, None))
3299 continue;
3300 if(handler[ev.type])
3301 (handler[ev.type])(&ev);
3302 }
3303
3304 draw();
3305 XFlush(xw.dpy);
3306 last = now;
3307
3308 if(xev && !FD_ISSET(xfd, &rfd))
3309 xev--;
3310 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd))
3311 tv = NULL;
3312 }
3313 }
3314 }
3315
3316 int
3317 main(int argc, char *argv[]) {
3318 int i, bitm, xr, yr;
3319 uint wr, hr;
3320
3321 xw.fw = xw.fh = xw.fx = xw.fy = 0;
3322 xw.isfixed = False;
3323
3324 for(i = 1; i < argc; i++) {
3325 switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
3326 case 'c':
3327 if(++i < argc)
3328 opt_class = argv[i];
3329 break;
3330 case 'e':
3331 /* eat all remaining arguments */
3332 if(++i < argc)
3333 opt_cmd = &argv[i];
3334 goto run;
3335 case 'f':
3336 if(++i < argc)
3337 opt_font = argv[i];
3338 break;
3339 case 'g':
3340 if(++i >= argc)
3341 break;
3342
3343 bitm = XParseGeometry(argv[i], &xr, &yr, &wr, &hr);
3344 if(bitm & XValue)
3345 xw.fx = xr;
3346 if(bitm & YValue)
3347 xw.fy = yr;
3348 if(bitm & WidthValue)
3349 xw.fw = (int)wr;
3350 if(bitm & HeightValue)
3351 xw.fh = (int)hr;
3352 if(bitm & XNegative && xw.fx == 0)
3353 xw.fx = -1;
3354 if(bitm & XNegative && xw.fy == 0)
3355 xw.fy = -1;
3356
3357 if(xw.fh != 0 && xw.fw != 0)
3358 xw.isfixed = True;
3359 break;
3360 case 'o':
3361 if(++i < argc)
3362 opt_io = argv[i];
3363 break;
3364 case 't':
3365 if(++i < argc)
3366 opt_title = argv[i];
3367 break;
3368 case 'v':
3369 default:
3370 die(USAGE);
3371 case 'w':
3372 if(++i < argc)
3373 opt_embed = argv[i];
3374 break;
3375 }
3376 }
3377
3378 run:
3379 setlocale(LC_CTYPE, "");
3380 XSetLocaleModifiers("");
3381 tnew(80, 24);
3382 xinit();
3383 ttynew();
3384 selinit();
3385 run();
3386
3387 return 0;
3388 }
3389