Xinqi Bao's Git

projects / st.git / blob


6117c929df5a053b5114f913574a7f9000f02379
[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/extensions/Xdbe.h>
29 #include <X11/Xft/Xft.h>
30 #include <fontconfig/fontconfig.h>
31
32 #define Glyph Glyph_
33 #define Font Font_
34 #define Draw XftDraw *
35 #define Colour XftColor
36 #define Colourmap Colormap
37
38 #if defined(__linux)
39 #include <pty.h>
40 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
41 #include <util.h>
42 #elif defined(__FreeBSD__) || defined(__DragonFly__)
43 #include <libutil.h>
44 #endif
45
46 #define USAGE \
47 "st " VERSION " (c) 2010-2013 st engineers\n" \
48 "usage: st [-v] [-c class] [-f font] [-g geometry] [-o file]" \
49 " [-t title] [-w windowid] [-e command ...]\n"
50
51 /* XEMBED messages */
52 #define XEMBED_FOCUS_IN 4
53 #define XEMBED_FOCUS_OUT 5
54
55 /* Arbitrary sizes */
56 #define UTF_SIZ 4
57 #define ESC_BUF_SIZ (128*UTF_SIZ)
58 #define ESC_ARG_SIZ 16
59 #define STR_BUF_SIZ ESC_BUF_SIZ
60 #define STR_ARG_SIZ ESC_ARG_SIZ
61 #define DRAW_BUF_SIZ 20*1024
62 #define XK_ANY_MOD UINT_MAX
63 #define XK_NO_MOD 0
64 #define XK_SWITCH_MOD (1<<13)
65
66 #define REDRAW_TIMEOUT (80*1000) /* 80 ms */
67
68 /* macros */
69 #define SERRNO strerror(errno)
70 #define MIN(a, b) ((a) < (b) ? (a) : (b))
71 #define MAX(a, b) ((a) < (b) ? (b) : (a))
72 #define LEN(a) (sizeof(a) / sizeof(a[0]))
73 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
74 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
75 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
76 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
77 #define IS_SET(flag) ((term.mode & (flag)) != 0)
78 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_usec-t2.tv_usec)/1000)
79
80 #define VT102ID "\033[?6c"
81
82 enum glyph_attribute {
83 ATTR_NULL = 0,
84 ATTR_REVERSE = 1,
85 ATTR_UNDERLINE = 2,
86 ATTR_BOLD = 4,
87 ATTR_GFX = 8,
88 ATTR_ITALIC = 16,
89 ATTR_BLINK = 32,
90 };
91
92 enum cursor_movement {
93 CURSOR_SAVE,
94 CURSOR_LOAD
95 };
96
97 enum cursor_state {
98 CURSOR_DEFAULT = 0,
99 CURSOR_WRAPNEXT = 1,
100 CURSOR_ORIGIN = 2
101 };
102
103 enum glyph_state {
104 GLYPH_SET = 1,
105 GLYPH_DIRTY = 2
106 };
107
108 enum term_mode {
109 MODE_WRAP = 1,
110 MODE_INSERT = 2,
111 MODE_APPKEYPAD = 4,
112 MODE_ALTSCREEN = 8,
113 MODE_CRLF = 16,
114 MODE_MOUSEBTN = 32,
115 MODE_MOUSEMOTION = 64,
116 MODE_MOUSE = 32|64,
117 MODE_REVERSE = 128,
118 MODE_KBDLOCK = 256,
119 MODE_HIDE = 512,
120 MODE_ECHO = 1024,
121 MODE_APPCURSOR = 2048,
122 MODE_MOUSESGR = 4096,
123 };
124
125 enum escape_state {
126 ESC_START = 1,
127 ESC_CSI = 2,
128 ESC_STR = 4, /* DSC, OSC, PM, APC */
129 ESC_ALTCHARSET = 8,
130 ESC_STR_END = 16, /* a final string was encountered */
131 ESC_TEST = 32, /* Enter in test mode */
132 };
133
134 enum window_state {
135 WIN_VISIBLE = 1,
136 WIN_REDRAW = 2,
137 WIN_FOCUSED = 4
138 };
139
140 enum selection_type {
141 SEL_REGULAR = 1,
142 SEL_RECTANGULAR = 2
143 };
144
145 /* bit macro */
146 #undef B0
147 enum { B0=1, B1=2, B2=4, B3=8, B4=16, B5=32, B6=64, B7=128 };
148
149 typedef unsigned char uchar;
150 typedef unsigned int uint;
151 typedef unsigned long ulong;
152 typedef unsigned short ushort;
153
154 typedef struct {
155 char c[UTF_SIZ]; /* character code */
156 uchar mode; /* attribute flags */
157 ushort fg; /* foreground */
158 ushort bg; /* background */
159 uchar state; /* state flags */
160 } Glyph;
161
162 typedef Glyph *Line;
163
164 typedef struct {
165 Glyph attr; /* current char attributes */
166 int x;
167 int y;
168 char state;
169 } TCursor;
170
171 /* CSI Escape sequence structs */
172 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
173 typedef struct {
174 char buf[ESC_BUF_SIZ]; /* raw string */
175 int len; /* raw string length */
176 char priv;
177 int arg[ESC_ARG_SIZ];
178 int narg; /* nb of args */
179 char mode;
180 } CSIEscape;
181
182 /* STR Escape sequence structs */
183 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
184 typedef struct {
185 char type; /* ESC type ... */
186 char buf[STR_BUF_SIZ]; /* raw string */
187 int len; /* raw string length */
188 char *args[STR_ARG_SIZ];
189 int narg; /* nb of args */
190 } STREscape;
191
192 /* Internal representation of the screen */
193 typedef struct {
194 int row; /* nb row */
195 int col; /* nb col */
196 Line *line; /* screen */
197 Line *alt; /* alternate screen */
198 bool *dirty; /* dirtyness of lines */
199 TCursor c; /* cursor */
200 int top; /* top scroll limit */
201 int bot; /* bottom scroll limit */
202 int mode; /* terminal mode flags */
203 int esc; /* escape state flags */
204 bool numlock; /* lock numbers in keyboard */
205 bool *tabs;
206 } Term;
207
208 /* Purely graphic info */
209 typedef struct {
210 Display *dpy;
211 Colourmap cmap;
212 Window win;
213 Drawable buf;
214 Atom xembed, wmdeletewin;
215 XIM xim;
216 XIC xic;
217 Draw draw;
218 Visual *vis;
219 int scr;
220 bool isfixed; /* is fixed geometry? */
221 int fx, fy, fw, fh; /* fixed geometry */
222 int tw, th; /* tty width and height */
223 int w, h; /* window width and height */
224 int ch; /* char height */
225 int cw; /* char width */
226 char state; /* focus, redraw, visible */
227 } XWindow;
228
229 typedef struct {
230 KeySym k;
231 uint mask;
232 char s[ESC_BUF_SIZ];
233 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
234 signed char appkey; /* application keypad */
235 signed char appcursor; /* application cursor */
236 signed char crlf; /* crlf mode */
237 } Key;
238
239 /* TODO: use better name for vars... */
240 typedef struct {
241 int mode;
242 int type;
243 int bx, by;
244 int ex, ey;
245 struct {
246 int x, y;
247 } b, e;
248 char *clip;
249 Atom xtarget;
250 bool alt;
251 struct timeval tclick1;
252 struct timeval tclick2;
253 } Selection;
254
255 typedef union {
256 int i;
257 unsigned int ui;
258 float f;
259 const void *v;
260 } Arg;
261
262 typedef struct {
263 unsigned int mod;
264 KeySym keysym;
265 void (*func)(const Arg *);
266 const Arg arg;
267 } Shortcut;
268
269 /* function definitions used in config.h */
270 static void xzoom(const Arg *);
271 static void selpaste(const Arg *);
272 static void numlock(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 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 bool usedbe = False;
427
428 static char *usedfont = NULL;
429 static int usedfontsize = 0;
430
431 /* Font Ring Cache */
432 enum {
433 FRC_NORMAL,
434 FRC_ITALIC,
435 FRC_BOLD,
436 FRC_ITALICBOLD
437 };
438
439 typedef struct {
440 XftFont *font;
441 long c;
442 int flags;
443 } Fontcache;
444
445 /*
446 * Fontcache is a ring buffer, with frccur as current position and frclen as
447 * the current length of used elements.
448 */
449
450 static Fontcache frc[1024];
451 static int frccur = -1, frclen = 0;
452
453 ssize_t
454 xwrite(int fd, char *s, size_t len) {
455 size_t aux = len;
456
457 while(len > 0) {
458 ssize_t r = write(fd, s, len);
459 if(r < 0)
460 return r;
461 len -= r;
462 s += r;
463 }
464 return aux;
465 }
466
467 void *
468 xmalloc(size_t len) {
469 void *p = malloc(len);
470
471 if(!p)
472 die("Out of memory\n");
473
474 return p;
475 }
476
477 void *
478 xrealloc(void *p, size_t len) {
479 if((p = realloc(p, len)) == NULL)
480 die("Out of memory\n");
481
482 return p;
483 }
484
485 void *
486 xcalloc(size_t nmemb, size_t size) {
487 void *p = calloc(nmemb, size);
488
489 if(!p)
490 die("Out of memory\n");
491
492 return p;
493 }
494
495 int
496 utf8decode(char *s, long *u) {
497 uchar c;
498 int i, n, rtn;
499
500 rtn = 1;
501 c = *s;
502 if(~c & B7) { /* 0xxxxxxx */
503 *u = c;
504 return rtn;
505 } else if((c & (B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */
506 *u = c&(B4|B3|B2|B1|B0);
507 n = 1;
508 } else if((c & (B7|B6|B5|B4)) == (B7|B6|B5)) { /* 1110xxxx */
509 *u = c&(B3|B2|B1|B0);
510 n = 2;
511 } else if((c & (B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) { /* 11110xxx */
512 *u = c & (B2|B1|B0);
513 n = 3;
514 } else {
515 goto invalid;
516 }
517
518 for(i = n, ++s; i > 0; --i, ++rtn, ++s) {
519 c = *s;
520 if((c & (B7|B6)) != B7) /* 10xxxxxx */
521 goto invalid;
522 *u <<= 6;
523 *u |= c & (B5|B4|B3|B2|B1|B0);
524 }
525
526 if((n == 1 && *u < 0x80) ||
527 (n == 2 && *u < 0x800) ||
528 (n == 3 && *u < 0x10000) ||
529 (*u >= 0xD800 && *u <= 0xDFFF)) {
530 goto invalid;
531 }
532
533 return rtn;
534 invalid:
535 *u = 0xFFFD;
536
537 return rtn;
538 }
539
540 int
541 utf8encode(long *u, char *s) {
542 uchar *sp;
543 ulong uc;
544 int i, n;
545
546 sp = (uchar *)s;
547 uc = *u;
548 if(uc < 0x80) {
549 *sp = uc; /* 0xxxxxxx */
550 return 1;
551 } else if(*u < 0x800) {
552 *sp = (uc >> 6) | (B7|B6); /* 110xxxxx */
553 n = 1;
554 } else if(uc < 0x10000) {
555 *sp = (uc >> 12) | (B7|B6|B5); /* 1110xxxx */
556 n = 2;
557 } else if(uc <= 0x10FFFF) {
558 *sp = (uc >> 18) | (B7|B6|B5|B4); /* 11110xxx */
559 n = 3;
560 } else {
561 goto invalid;
562 }
563
564 for(i=n,++sp; i>0; --i,++sp)
565 *sp = ((uc >> 6*(i-1)) & (B5|B4|B3|B2|B1|B0)) | B7; /* 10xxxxxx */
566
567 return n+1;
568 invalid:
569 /* U+FFFD */
570 *s++ = '\xEF';
571 *s++ = '\xBF';
572 *s = '\xBD';
573
574 return 3;
575 }
576
577 /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
578 UTF-8 otherwise return 0 */
579 int
580 isfullutf8(char *s, int b) {
581 uchar *c1, *c2, *c3;
582
583 c1 = (uchar *)s;
584 c2 = (uchar *)++s;
585 c3 = (uchar *)++s;
586 if(b < 1) {
587 return 0;
588 } else if((*c1&(B7|B6|B5)) == (B7|B6) && b == 1) {
589 return 0;
590 } else if((*c1&(B7|B6|B5|B4)) == (B7|B6|B5) &&
591 ((b == 1) ||
592 ((b == 2) && (*c2&(B7|B6)) == B7))) {
593 return 0;
594 } else if((*c1&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4) &&
595 ((b == 1) ||
596 ((b == 2) && (*c2&(B7|B6)) == B7) ||
597 ((b == 3) && (*c2&(B7|B6)) == B7 && (*c3&(B7|B6)) == B7))) {
598 return 0;
599 } else {
600 return 1;
601 }
602 }
603
604 int
605 utf8size(char *s) {
606 uchar c = *s;
607
608 if(~c&B7) {
609 return 1;
610 } else if((c&(B7|B6|B5)) == (B7|B6)) {
611 return 2;
612 } else if((c&(B7|B6|B5|B4)) == (B7|B6|B5)) {
613 return 3;
614 } else {
615 return 4;
616 }
617 }
618
619 void
620 selinit(void) {
621 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
622 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
623 sel.mode = 0;
624 sel.bx = -1;
625 sel.clip = NULL;
626 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
627 if(sel.xtarget == None)
628 sel.xtarget = XA_STRING;
629 }
630
631 static int
632 x2col(int x) {
633 x -= borderpx;
634 x /= xw.cw;
635
636 return LIMIT(x, 0, term.col-1);
637 }
638
639 static int
640 y2row(int y) {
641 y -= borderpx;
642 y /= xw.ch;
643
644 return LIMIT(y, 0, term.row-1);
645 }
646
647 static inline bool
648 selected(int x, int y) {
649 int bx, ex;
650
651 if(sel.ey == y && sel.by == y) {
652 bx = MIN(sel.bx, sel.ex);
653 ex = MAX(sel.bx, sel.ex);
654 return BETWEEN(x, bx, ex);
655 }
656
657 return ((sel.b.y < y && y < sel.e.y)
658 || (y == sel.e.y && x <= sel.e.x))
659 || (y == sel.b.y && x >= sel.b.x
660 && (x <= sel.e.x || sel.b.y != sel.e.y));
661 switch(sel.type) {
662 case SEL_REGULAR:
663 return ((sel.b.y < y && y < sel.e.y)
664 || (y == sel.e.y && x <= sel.e.x))
665 || (y == sel.b.y && x >= sel.b.x
666 && (x <= sel.e.x || sel.b.y != sel.e.y));
667 case SEL_RECTANGULAR:
668 return ((sel.b.y <= y && y <= sel.e.y)
669 && (sel.b.x <= x && x <= sel.e.x));
670 };
671 }
672
673 void
674 getbuttoninfo(XEvent *e) {
675 int type;
676 uint state = e->xbutton.state &~Button1Mask;
677
678 sel.alt = IS_SET(MODE_ALTSCREEN);
679
680 sel.ex = x2col(e->xbutton.x);
681 sel.ey = y2row(e->xbutton.y);
682
683 sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
684 sel.b.y = MIN(sel.by, sel.ey);
685 sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
686 sel.e.y = MAX(sel.by, sel.ey);
687
688 sel.type = SEL_REGULAR;
689 for(type = 1; type < LEN(selmasks); ++type) {
690 if(match(selmasks[type], state)) {
691 sel.type = type;
692 break;
693 }
694 }
695 }
696
697 void
698 mousereport(XEvent *e) {
699 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
700 button = e->xbutton.button, state = e->xbutton.state,
701 len;
702 char buf[40];
703 static int ob, ox, oy;
704
705 /* from urxvt */
706 if(e->xbutton.type == MotionNotify) {
707 if(!IS_SET(MODE_MOUSEMOTION) || (x == ox && y == oy))
708 return;
709 button = ob + 32;
710 ox = x, oy = y;
711 } else if(!IS_SET(MODE_MOUSESGR)
712 && (e->xbutton.type == ButtonRelease
713 || button == AnyButton)) {
714 button = 3;
715 } else {
716 button -= Button1;
717 if(button >= 3)
718 button += 64 - 3;
719 if(e->xbutton.type == ButtonPress) {
720 ob = button;
721 ox = x, oy = y;
722 }
723 }
724
725 button += (state & ShiftMask ? 4 : 0)
726 + (state & Mod4Mask ? 8 : 0)
727 + (state & ControlMask ? 16 : 0);
728
729 len = 0;
730 if(IS_SET(MODE_MOUSESGR)) {
731 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
732 button, x+1, y+1,
733 e->xbutton.type == ButtonRelease ? 'm' : 'M');
734 } else if(x < 223 && y < 223) {
735 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
736 32+button, 32+x+1, 32+y+1);
737 } else {
738 return;
739 }
740
741 ttywrite(buf, len);
742 }
743
744 void
745 bpress(XEvent *e) {
746 if(IS_SET(MODE_MOUSE)) {
747 mousereport(e);
748 } else if(e->xbutton.button == Button1) {
749 if(sel.bx != -1) {
750 sel.bx = -1;
751 tsetdirt(sel.b.y, sel.e.y);
752 draw();
753 }
754 sel.mode = 1;
755 sel.type = SEL_REGULAR;
756 sel.ex = sel.bx = x2col(e->xbutton.x);
757 sel.ey = sel.by = y2row(e->xbutton.y);
758 } else if(e->xbutton.button == Button4) {
759 ttywrite("\031", 1);
760 } else if(e->xbutton.button == Button5) {
761 ttywrite("\005", 1);
762 }
763 }
764
765 void
766 selcopy(void) {
767 char *str, *ptr, *p;
768 int x, y, bufsize, is_selected = 0, size;
769 Glyph *gp, *last;
770
771 if(sel.bx == -1) {
772 str = NULL;
773 } else {
774 bufsize = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
775 ptr = str = xmalloc(bufsize);
776
777 /* append every set & selected glyph to the selection */
778 for(y = sel.b.y; y < sel.e.y + 1; y++) {
779 is_selected = 0;
780 gp = &term.line[y][0];
781 last = gp + term.col;
782
783 while(--last >= gp && !(last->state & GLYPH_SET))
784 /* nothing */;
785
786 for(x = 0; gp <= last; x++, ++gp) {
787 if(!selected(x, y)) {
788 continue;
789 } else {
790 is_selected = 1;
791 }
792
793 p = (gp->state & GLYPH_SET) ? gp->c : " ";
794 size = utf8size(p);
795 memcpy(ptr, p, size);
796 ptr += size;
797 }
798 /* \n at the end of every selected line except for the last one */
799 if(is_selected && y < sel.e.y)
800 *ptr++ = '\n';
801 }
802 *ptr = 0;
803 }
804 xsetsel(str);
805 }
806
807 void
808 selnotify(XEvent *e) {
809 ulong nitems, ofs, rem;
810 int format;
811 uchar *data;
812 Atom type;
813
814 ofs = 0;
815 do {
816 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
817 False, AnyPropertyType, &type, &format,
818 &nitems, &rem, &data)) {
819 fprintf(stderr, "Clipboard allocation failed\n");
820 return;
821 }
822 ttywrite((const char *) data, nitems * format / 8);
823 XFree(data);
824 /* number of 32-bit chunks returned */
825 ofs += nitems * format / 32;
826 } while(rem > 0);
827 }
828
829 void
830 selpaste(const Arg *dummy) {
831 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
832 xw.win, CurrentTime);
833 }
834
835 void selclear(XEvent *e) {
836 if(sel.bx == -1)
837 return;
838 sel.bx = -1;
839 tsetdirt(sel.b.y, sel.e.y);
840 }
841
842 void
843 selrequest(XEvent *e) {
844 XSelectionRequestEvent *xsre;
845 XSelectionEvent xev;
846 Atom xa_targets, string;
847
848 xsre = (XSelectionRequestEvent *) e;
849 xev.type = SelectionNotify;
850 xev.requestor = xsre->requestor;
851 xev.selection = xsre->selection;
852 xev.target = xsre->target;
853 xev.time = xsre->time;
854 /* reject */
855 xev.property = None;
856
857 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
858 if(xsre->target == xa_targets) {
859 /* respond with the supported type */
860 string = sel.xtarget;
861 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
862 XA_ATOM, 32, PropModeReplace,
863 (uchar *) &string, 1);
864 xev.property = xsre->property;
865 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
866 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
867 xsre->target, 8, PropModeReplace,
868 (uchar *) sel.clip, strlen(sel.clip));
869 xev.property = xsre->property;
870 }
871
872 /* all done, send a notification to the listener */
873 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
874 fprintf(stderr, "Error sending SelectionNotify event\n");
875 }
876
877 void
878 xsetsel(char *str) {
879 /* register the selection for both the clipboard and the primary */
880 Atom clipboard;
881
882 free(sel.clip);
883 sel.clip = str;
884
885 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
886
887 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
888 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
889 }
890
891 void
892 brelease(XEvent *e) {
893 struct timeval now;
894
895 if(IS_SET(MODE_MOUSE)) {
896 mousereport(e);
897 return;
898 }
899
900 if(e->xbutton.button == Button2) {
901 selpaste(NULL);
902 } else if(e->xbutton.button == Button1) {
903 sel.mode = 0;
904 getbuttoninfo(e);
905 term.dirty[sel.ey] = 1;
906 if(sel.bx == sel.ex && sel.by == sel.ey) {
907 sel.bx = -1;
908 gettimeofday(&now, NULL);
909
910 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
911 /* triple click on the line */
912 sel.b.x = sel.bx = 0;
913 sel.e.x = sel.ex = term.col;
914 sel.b.y = sel.e.y = sel.ey;
915 selcopy();
916 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
917 /* double click to select word */
918 sel.bx = sel.ex;
919 while(sel.bx > 0 && term.line[sel.ey][sel.bx-1].state & GLYPH_SET &&
920 term.line[sel.ey][sel.bx-1].c[0] != ' ') {
921 sel.bx--;
922 }
923 sel.b.x = sel.bx;
924 while(sel.ex < term.col-1 && term.line[sel.ey][sel.ex+1].state & GLYPH_SET &&
925 term.line[sel.ey][sel.ex+1].c[0] != ' ') {
926 sel.ex++;
927 }
928 sel.e.x = sel.ex;
929 sel.b.y = sel.e.y = sel.ey;
930 selcopy();
931 }
932 } else {
933 selcopy();
934 }
935 }
936
937 memcpy(&sel.tclick2, &sel.tclick1, sizeof(struct timeval));
938 gettimeofday(&sel.tclick1, NULL);
939 }
940
941 void
942 bmotion(XEvent *e) {
943 int oldey, oldex, oldsby, oldsey;
944
945 if(IS_SET(MODE_MOUSE)) {
946 mousereport(e);
947 return;
948 }
949
950 if(!sel.mode)
951 return;
952
953 oldey = sel.ey;
954 oldex = sel.ex;
955 oldsby = sel.b.y;
956 oldsey = sel.e.y;
957 getbuttoninfo(e);
958
959 if(oldey != sel.ey || oldex != sel.ex) {
960 tsetdirt(MIN(sel.b.y, oldsby), MAX(sel.e.y, oldsey));
961 }
962 }
963
964 void
965 die(const char *errstr, ...) {
966 va_list ap;
967
968 va_start(ap, errstr);
969 vfprintf(stderr, errstr, ap);
970 va_end(ap);
971 exit(EXIT_FAILURE);
972 }
973
974 void
975 execsh(void) {
976 char **args;
977 char *envshell = getenv("SHELL");
978 const struct passwd *pass = getpwuid(getuid());
979 char buf[sizeof(long) * 8 + 1];
980
981 unsetenv("COLUMNS");
982 unsetenv("LINES");
983 unsetenv("TERMCAP");
984
985 if(pass) {
986 setenv("LOGNAME", pass->pw_name, 1);
987 setenv("USER", pass->pw_name, 1);
988 setenv("SHELL", pass->pw_shell, 0);
989 setenv("HOME", pass->pw_dir, 0);
990 }
991
992 snprintf(buf, sizeof(buf), "%lu", xw.win);
993 setenv("WINDOWID", buf, 1);
994
995 signal(SIGCHLD, SIG_DFL);
996 signal(SIGHUP, SIG_DFL);
997 signal(SIGINT, SIG_DFL);
998 signal(SIGQUIT, SIG_DFL);
999 signal(SIGTERM, SIG_DFL);
1000 signal(SIGALRM, SIG_DFL);
1001
1002 DEFAULT(envshell, shell);
1003 setenv("TERM", termname, 1);
1004 args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
1005 execvp(args[0], args);
1006 exit(EXIT_FAILURE);
1007 }
1008
1009 void
1010 sigchld(int a) {
1011 int stat = 0;
1012
1013 if(waitpid(pid, &stat, 0) < 0)
1014 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
1015
1016 if(WIFEXITED(stat)) {
1017 exit(WEXITSTATUS(stat));
1018 } else {
1019 exit(EXIT_FAILURE);
1020 }
1021 }
1022
1023 void
1024 ttynew(void) {
1025 int m, s;
1026 struct winsize w = {term.row, term.col, 0, 0};
1027
1028 /* seems to work fine on linux, openbsd and freebsd */
1029 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1030 die("openpty failed: %s\n", SERRNO);
1031
1032 switch(pid = fork()) {
1033 case -1:
1034 die("fork failed\n");
1035 break;
1036 case 0:
1037 setsid(); /* create a new process group */
1038 dup2(s, STDIN_FILENO);
1039 dup2(s, STDOUT_FILENO);
1040 dup2(s, STDERR_FILENO);
1041 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1042 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
1043 close(s);
1044 close(m);
1045 execsh();
1046 break;
1047 default:
1048 close(s);
1049 cmdfd = m;
1050 signal(SIGCHLD, sigchld);
1051 if(opt_io) {
1052 iofd = (!strcmp(opt_io, "-")) ?
1053 STDOUT_FILENO :
1054 open(opt_io, O_WRONLY | O_CREAT, 0666);
1055 if(iofd < 0) {
1056 fprintf(stderr, "Error opening %s:%s\n",
1057 opt_io, strerror(errno));
1058 }
1059 }
1060 }
1061 }
1062
1063 void
1064 dump(char c) {
1065 static int col;
1066
1067 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
1068 if(++col % 10 == 0)
1069 fprintf(stderr, "\n");
1070 }
1071
1072 void
1073 ttyread(void) {
1074 static char buf[BUFSIZ];
1075 static int buflen = 0;
1076 char *ptr;
1077 char s[UTF_SIZ];
1078 int charsize; /* size of utf8 char in bytes */
1079 long utf8c;
1080 int ret;
1081
1082 /* append read bytes to unprocessed bytes */
1083 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1084 die("Couldn't read from shell: %s\n", SERRNO);
1085
1086 /* process every complete utf8 char */
1087 buflen += ret;
1088 ptr = buf;
1089 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
1090 charsize = utf8decode(ptr, &utf8c);
1091 utf8encode(&utf8c, s);
1092 tputc(s, charsize);
1093 ptr += charsize;
1094 buflen -= charsize;
1095 }
1096
1097 /* keep any uncomplete utf8 char for the next call */
1098 memmove(buf, ptr, buflen);
1099 }
1100
1101 void
1102 ttywrite(const char *s, size_t n) {
1103 if(write(cmdfd, s, n) == -1)
1104 die("write error on tty: %s\n", SERRNO);
1105 }
1106
1107 void
1108 ttyresize(void) {
1109 struct winsize w;
1110
1111 w.ws_row = term.row;
1112 w.ws_col = term.col;
1113 w.ws_xpixel = xw.tw;
1114 w.ws_ypixel = xw.th;
1115 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1116 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
1117 }
1118
1119 void
1120 tsetdirt(int top, int bot) {
1121 int i;
1122
1123 LIMIT(top, 0, term.row-1);
1124 LIMIT(bot, 0, term.row-1);
1125
1126 for(i = top; i <= bot; i++)
1127 term.dirty[i] = 1;
1128 }
1129
1130 void
1131 tfulldirt(void) {
1132 tsetdirt(0, term.row-1);
1133 }
1134
1135 void
1136 tcursor(int mode) {
1137 static TCursor c;
1138
1139 if(mode == CURSOR_SAVE) {
1140 c = term.c;
1141 } else if(mode == CURSOR_LOAD) {
1142 term.c = c;
1143 tmoveto(c.x, c.y);
1144 }
1145 }
1146
1147 void
1148 treset(void) {
1149 uint i;
1150
1151 term.c = (TCursor){{
1152 .mode = ATTR_NULL,
1153 .fg = defaultfg,
1154 .bg = defaultbg
1155 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1156
1157 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1158 for(i = tabspaces; i < term.col; i += tabspaces)
1159 term.tabs[i] = 1;
1160 term.top = 0;
1161 term.bot = term.row - 1;
1162 term.mode = MODE_WRAP;
1163
1164 tclearregion(0, 0, term.col-1, term.row-1, 0);
1165 tmoveto(0, 0);
1166 tcursor(CURSOR_SAVE);
1167 }
1168
1169 void
1170 tnew(int col, int row) {
1171 /* set screen size */
1172 term.row = row;
1173 term.col = col;
1174 term.line = xmalloc(term.row * sizeof(Line));
1175 term.alt = xmalloc(term.row * sizeof(Line));
1176 term.dirty = xmalloc(term.row * sizeof(*term.dirty));
1177 term.tabs = xmalloc(term.col * sizeof(*term.tabs));
1178
1179 for(row = 0; row < term.row; row++) {
1180 term.line[row] = xmalloc(term.col * sizeof(Glyph));
1181 term.alt [row] = xmalloc(term.col * sizeof(Glyph));
1182 term.dirty[row] = 0;
1183 }
1184
1185 term.numlock = 1;
1186 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1187 /* setup screen */
1188 treset();
1189 }
1190
1191 void
1192 tswapscreen(void) {
1193 Line *tmp = term.line;
1194
1195 term.line = term.alt;
1196 term.alt = tmp;
1197 term.mode ^= MODE_ALTSCREEN;
1198 tfulldirt();
1199 }
1200
1201 void
1202 tscrolldown(int orig, int n) {
1203 int i;
1204 Line temp;
1205
1206 LIMIT(n, 0, term.bot-orig+1);
1207
1208 tclearregion(0, term.bot-n+1, term.col-1, term.bot, 0);
1209
1210 for(i = term.bot; i >= orig+n; i--) {
1211 temp = term.line[i];
1212 term.line[i] = term.line[i-n];
1213 term.line[i-n] = temp;
1214
1215 term.dirty[i] = 1;
1216 term.dirty[i-n] = 1;
1217 }
1218
1219 selscroll(orig, n);
1220 }
1221
1222 void
1223 tscrollup(int orig, int n) {
1224 int i;
1225 Line temp;
1226 LIMIT(n, 0, term.bot-orig+1);
1227
1228 tclearregion(0, orig, term.col-1, orig+n-1, 0);
1229
1230 for(i = orig; i <= term.bot-n; i++) {
1231 temp = term.line[i];
1232 term.line[i] = term.line[i+n];
1233 term.line[i+n] = temp;
1234
1235 term.dirty[i] = 1;
1236 term.dirty[i+n] = 1;
1237 }
1238
1239 selscroll(orig, -n);
1240 }
1241
1242 void
1243 selscroll(int orig, int n) {
1244 if(sel.bx == -1)
1245 return;
1246
1247 if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
1248 if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
1249 sel.bx = -1;
1250 return;
1251 }
1252 switch(sel.type) {
1253 case SEL_REGULAR:
1254 if(sel.by < term.top) {
1255 sel.by = term.top;
1256 sel.bx = 0;
1257 }
1258 if(sel.ey > term.bot) {
1259 sel.ey = term.bot;
1260 sel.ex = term.col;
1261 }
1262 break;
1263 case SEL_RECTANGULAR:
1264 if(sel.by < term.top)
1265 sel.by = term.top;
1266 if(sel.ey > term.bot)
1267 sel.ey = term.bot;
1268 break;
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 /* int noarg = 1; */
1290 char *p = csiescseq.buf;
1291
1292 csiescseq.narg = 0;
1293 if(*p == '?')
1294 csiescseq.priv = 1, p++;
1295
1296 while(p < csiescseq.buf+csiescseq.len) {
1297 while(isdigit(*p)) {
1298 csiescseq.arg[csiescseq.narg] *= 10;
1299 csiescseq.arg[csiescseq.narg] += *p++ - '0'/*, noarg = 0 */;
1300 }
1301 if(*p == ';' && csiescseq.narg+1 < ESC_ARG_SIZ) {
1302 csiescseq.narg++, p++;
1303 } else {
1304 csiescseq.mode = *p;
1305 csiescseq.narg++;
1306
1307 return;
1308 }
1309 }
1310 }
1311
1312 /* for absolute user moves, when decom is set */
1313 void
1314 tmoveato(int x, int y) {
1315 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1316 }
1317
1318 void
1319 tmoveto(int x, int y) {
1320 int miny, maxy;
1321
1322 if(term.c.state & CURSOR_ORIGIN) {
1323 miny = term.top;
1324 maxy = term.bot;
1325 } else {
1326 miny = 0;
1327 maxy = term.row - 1;
1328 }
1329 LIMIT(x, 0, term.col-1);
1330 LIMIT(y, miny, maxy);
1331 term.c.state &= ~CURSOR_WRAPNEXT;
1332 term.c.x = x;
1333 term.c.y = y;
1334 }
1335
1336 void
1337 tsetchar(char *c, Glyph *attr, int x, int y) {
1338 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1339 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1340 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1341 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1342 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1343 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1344 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1345 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1346 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1347 };
1348
1349 /*
1350 * The table is proudly stolen from rxvt.
1351 */
1352 if(attr->mode & ATTR_GFX) {
1353 if(c[0] >= 0x41 && c[0] <= 0x7e
1354 && vt100_0[c[0] - 0x41]) {
1355 c = vt100_0[c[0] - 0x41];
1356 }
1357 }
1358
1359 term.dirty[y] = 1;
1360 term.line[y][x] = *attr;
1361 memcpy(term.line[y][x].c, c, UTF_SIZ);
1362 term.line[y][x].state |= GLYPH_SET;
1363 }
1364
1365 void
1366 tclearregion(int x1, int y1, int x2, int y2, int bce) {
1367 int x, y, temp;
1368
1369 if(x1 > x2)
1370 temp = x1, x1 = x2, x2 = temp;
1371 if(y1 > y2)
1372 temp = y1, y1 = y2, y2 = temp;
1373
1374 LIMIT(x1, 0, term.col-1);
1375 LIMIT(x2, 0, term.col-1);
1376 LIMIT(y1, 0, term.row-1);
1377 LIMIT(y2, 0, term.row-1);
1378
1379 for(y = y1; y <= y2; y++) {
1380 term.dirty[y] = 1;
1381 for(x = x1; x <= x2; x++) {
1382 if(bce) {
1383 term.line[y][x] = term.c.attr;
1384 memcpy(term.line[y][x].c, " ", 2);
1385 term.line[y][x].state |= GLYPH_SET;
1386 } else {
1387 term.line[y][x].state = 0;
1388 }
1389 }
1390 }
1391 }
1392
1393 void
1394 tdeletechar(int n) {
1395 int src = term.c.x + n;
1396 int dst = term.c.x;
1397 int size = term.col - src;
1398
1399 term.dirty[term.c.y] = 1;
1400
1401 if(src >= term.col) {
1402 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 0);
1403 return;
1404 }
1405
1406 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1407 size * sizeof(Glyph));
1408 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y, 0);
1409 }
1410
1411 void
1412 tinsertblank(int n) {
1413 int src = term.c.x;
1414 int dst = src + n;
1415 int size = term.col - dst;
1416
1417 term.dirty[term.c.y] = 1;
1418
1419 if(dst >= term.col) {
1420 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 0);
1421 return;
1422 }
1423
1424 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1425 size * sizeof(Glyph));
1426 tclearregion(src, term.c.y, dst - 1, term.c.y, 0);
1427 }
1428
1429 void
1430 tinsertblankline(int n) {
1431 if(term.c.y < term.top || term.c.y > term.bot)
1432 return;
1433
1434 tscrolldown(term.c.y, n);
1435 }
1436
1437 void
1438 tdeleteline(int n) {
1439 if(term.c.y < term.top || term.c.y > term.bot)
1440 return;
1441
1442 tscrollup(term.c.y, n);
1443 }
1444
1445 void
1446 tsetattr(int *attr, int l) {
1447 int i;
1448
1449 for(i = 0; i < l; i++) {
1450 switch(attr[i]) {
1451 case 0:
1452 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD \
1453 | ATTR_ITALIC | ATTR_BLINK);
1454 term.c.attr.fg = defaultfg;
1455 term.c.attr.bg = defaultbg;
1456 break;
1457 case 1:
1458 term.c.attr.mode |= ATTR_BOLD;
1459 break;
1460 case 3:
1461 term.c.attr.mode |= ATTR_ITALIC;
1462 break;
1463 case 4:
1464 term.c.attr.mode |= ATTR_UNDERLINE;
1465 break;
1466 case 5: /* slow blink */
1467 case 6: /* rapid blink */
1468 term.c.attr.mode |= ATTR_BLINK;
1469 break;
1470 case 7:
1471 term.c.attr.mode |= ATTR_REVERSE;
1472 break;
1473 case 21:
1474 case 22:
1475 term.c.attr.mode &= ~ATTR_BOLD;
1476 break;
1477 case 23:
1478 term.c.attr.mode &= ~ATTR_ITALIC;
1479 break;
1480 case 24:
1481 term.c.attr.mode &= ~ATTR_UNDERLINE;
1482 break;
1483 case 25:
1484 case 26:
1485 term.c.attr.mode &= ~ATTR_BLINK;
1486 break;
1487 case 27:
1488 term.c.attr.mode &= ~ATTR_REVERSE;
1489 break;
1490 case 38:
1491 if(i + 2 < l && attr[i + 1] == 5) {
1492 i += 2;
1493 if(BETWEEN(attr[i], 0, 255)) {
1494 term.c.attr.fg = attr[i];
1495 } else {
1496 fprintf(stderr,
1497 "erresc: bad fgcolor %d\n",
1498 attr[i]);
1499 }
1500 } else {
1501 fprintf(stderr,
1502 "erresc(38): gfx attr %d unknown\n",
1503 attr[i]);
1504 }
1505 break;
1506 case 39:
1507 term.c.attr.fg = defaultfg;
1508 break;
1509 case 48:
1510 if(i + 2 < l && attr[i + 1] == 5) {
1511 i += 2;
1512 if(BETWEEN(attr[i], 0, 255)) {
1513 term.c.attr.bg = attr[i];
1514 } else {
1515 fprintf(stderr,
1516 "erresc: bad bgcolor %d\n",
1517 attr[i]);
1518 }
1519 } else {
1520 fprintf(stderr,
1521 "erresc(48): gfx attr %d unknown\n",
1522 attr[i]);
1523 }
1524 break;
1525 case 49:
1526 term.c.attr.bg = defaultbg;
1527 break;
1528 default:
1529 if(BETWEEN(attr[i], 30, 37)) {
1530 term.c.attr.fg = attr[i] - 30;
1531 } else if(BETWEEN(attr[i], 40, 47)) {
1532 term.c.attr.bg = attr[i] - 40;
1533 } else if(BETWEEN(attr[i], 90, 97)) {
1534 term.c.attr.fg = attr[i] - 90 + 8;
1535 } else if(BETWEEN(attr[i], 100, 107)) {
1536 term.c.attr.bg = attr[i] - 100 + 8;
1537 } else {
1538 fprintf(stderr,
1539 "erresc(default): gfx attr %d unknown\n",
1540 attr[i]), csidump();
1541 }
1542 break;
1543 }
1544 }
1545 }
1546
1547 void
1548 tsetscroll(int t, int b) {
1549 int temp;
1550
1551 LIMIT(t, 0, term.row-1);
1552 LIMIT(b, 0, term.row-1);
1553 if(t > b) {
1554 temp = t;
1555 t = b;
1556 b = temp;
1557 }
1558 term.top = t;
1559 term.bot = b;
1560 }
1561
1562 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1563
1564 void
1565 tsetmode(bool priv, bool set, int *args, int narg) {
1566 int *lim, mode;
1567 bool alt;
1568
1569 for(lim = args + narg; args < lim; ++args) {
1570 if(priv) {
1571 switch(*args) {
1572 break;
1573 case 1: /* DECCKM -- Cursor key */
1574 MODBIT(term.mode, set, MODE_APPCURSOR);
1575 break;
1576 case 5: /* DECSCNM -- Reverse video */
1577 mode = term.mode;
1578 MODBIT(term.mode, set, MODE_REVERSE);
1579 if(mode != term.mode)
1580 redraw(REDRAW_TIMEOUT);
1581 break;
1582 case 6: /* DECOM -- Origin */
1583 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1584 tmoveato(0, 0);
1585 break;
1586 case 7: /* DECAWM -- Auto wrap */
1587 MODBIT(term.mode, set, MODE_WRAP);
1588 break;
1589 case 0: /* Error (IGNORED) */
1590 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1591 case 3: /* DECCOLM -- Column (IGNORED) */
1592 case 4: /* DECSCLM -- Scroll (IGNORED) */
1593 case 8: /* DECARM -- Auto repeat (IGNORED) */
1594 case 18: /* DECPFF -- Printer feed (IGNORED) */
1595 case 19: /* DECPEX -- Printer extent (IGNORED) */
1596 case 42: /* DECNRCM -- National characters (IGNORED) */
1597 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1598 break;
1599 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1600 MODBIT(term.mode, !set, MODE_HIDE);
1601 break;
1602 case 1000: /* 1000,1002: enable xterm mouse report */
1603 MODBIT(term.mode, set, MODE_MOUSEBTN);
1604 MODBIT(term.mode, 0, MODE_MOUSEMOTION);
1605 break;
1606 case 1002:
1607 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1608 MODBIT(term.mode, 0, MODE_MOUSEBTN);
1609 break;
1610 case 1006:
1611 MODBIT(term.mode, set, MODE_MOUSESGR);
1612 break;
1613 case 1049: /* = 1047 and 1048 */
1614 case 47:
1615 case 1047: {
1616 alt = IS_SET(MODE_ALTSCREEN);
1617 if(alt) {
1618 tclearregion(0, 0, term.col-1,
1619 term.row-1, 0);
1620 }
1621 if(set ^ alt) /* set is always 1 or 0 */
1622 tswapscreen();
1623 if(*args != 1049)
1624 break;
1625 }
1626 /* pass through */
1627 case 1048:
1628 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1629 break;
1630 default:
1631 fprintf(stderr,
1632 "erresc: unknown private set/reset mode %d\n",
1633 *args);
1634 break;
1635 }
1636 } else {
1637 switch(*args) {
1638 case 0: /* Error (IGNORED) */
1639 break;
1640 case 2: /* KAM -- keyboard action */
1641 MODBIT(term.mode, set, MODE_KBDLOCK);
1642 break;
1643 case 4: /* IRM -- Insertion-replacement */
1644 MODBIT(term.mode, set, MODE_INSERT);
1645 break;
1646 case 12: /* SRM -- Send/Receive */
1647 MODBIT(term.mode, !set, MODE_ECHO);
1648 break;
1649 case 20: /* LNM -- Linefeed/new line */
1650 MODBIT(term.mode, set, MODE_CRLF);
1651 break;
1652 default:
1653 fprintf(stderr,
1654 "erresc: unknown set/reset mode %d\n",
1655 *args);
1656 break;
1657 }
1658 }
1659 }
1660 }
1661 #undef MODBIT
1662
1663
1664 void
1665 csihandle(void) {
1666 switch(csiescseq.mode) {
1667 default:
1668 unknown:
1669 fprintf(stderr, "erresc: unknown csi ");
1670 csidump();
1671 /* die(""); */
1672 break;
1673 case '@': /* ICH -- Insert <n> blank char */
1674 DEFAULT(csiescseq.arg[0], 1);
1675 tinsertblank(csiescseq.arg[0]);
1676 break;
1677 case 'A': /* CUU -- Cursor <n> Up */
1678 DEFAULT(csiescseq.arg[0], 1);
1679 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1680 break;
1681 case 'B': /* CUD -- Cursor <n> Down */
1682 case 'e': /* VPR --Cursor <n> Down */
1683 DEFAULT(csiescseq.arg[0], 1);
1684 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1685 break;
1686 case 'c': /* DA -- Device Attributes */
1687 if(csiescseq.arg[0] == 0)
1688 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1689 break;
1690 case 'C': /* CUF -- Cursor <n> Forward */
1691 case 'a': /* HPR -- Cursor <n> Forward */
1692 DEFAULT(csiescseq.arg[0], 1);
1693 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1694 break;
1695 case 'D': /* CUB -- Cursor <n> Backward */
1696 DEFAULT(csiescseq.arg[0], 1);
1697 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1698 break;
1699 case 'E': /* CNL -- Cursor <n> Down and first col */
1700 DEFAULT(csiescseq.arg[0], 1);
1701 tmoveto(0, term.c.y+csiescseq.arg[0]);
1702 break;
1703 case 'F': /* CPL -- Cursor <n> Up and first col */
1704 DEFAULT(csiescseq.arg[0], 1);
1705 tmoveto(0, term.c.y-csiescseq.arg[0]);
1706 break;
1707 case 'g': /* TBC -- Tabulation clear */
1708 switch(csiescseq.arg[0]) {
1709 case 0: /* clear current tab stop */
1710 term.tabs[term.c.x] = 0;
1711 break;
1712 case 3: /* clear all the tabs */
1713 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1714 break;
1715 default:
1716 goto unknown;
1717 }
1718 break;
1719 case 'G': /* CHA -- Move to <col> */
1720 case '`': /* HPA */
1721 DEFAULT(csiescseq.arg[0], 1);
1722 tmoveto(csiescseq.arg[0]-1, term.c.y);
1723 break;
1724 case 'H': /* CUP -- Move to <row> <col> */
1725 case 'f': /* HVP */
1726 DEFAULT(csiescseq.arg[0], 1);
1727 DEFAULT(csiescseq.arg[1], 1);
1728 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1729 break;
1730 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1731 DEFAULT(csiescseq.arg[0], 1);
1732 while(csiescseq.arg[0]--)
1733 tputtab(1);
1734 break;
1735 case 'J': /* ED -- Clear screen */
1736 sel.bx = -1;
1737 switch(csiescseq.arg[0]) {
1738 case 0: /* below */
1739 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 1);
1740 if(term.c.y < term.row-1) {
1741 tclearregion(0, term.c.y+1, term.col-1,
1742 term.row-1, 1);
1743 }
1744 break;
1745 case 1: /* above */
1746 if(term.c.y > 1)
1747 tclearregion(0, 0, term.col-1, term.c.y-1, 1);
1748 tclearregion(0, term.c.y, term.c.x, term.c.y, 1);
1749 break;
1750 case 2: /* all */
1751 tclearregion(0, 0, term.col-1, term.row-1, 1);
1752 break;
1753 default:
1754 goto unknown;
1755 }
1756 break;
1757 case 'K': /* EL -- Clear line */
1758 switch(csiescseq.arg[0]) {
1759 case 0: /* right */
1760 tclearregion(term.c.x, term.c.y, term.col-1,
1761 term.c.y, 1);
1762 break;
1763 case 1: /* left */
1764 tclearregion(0, term.c.y, term.c.x, term.c.y, 1);
1765 break;
1766 case 2: /* all */
1767 tclearregion(0, term.c.y, term.col-1, term.c.y, 1);
1768 break;
1769 }
1770 break;
1771 case 'S': /* SU -- Scroll <n> line up */
1772 DEFAULT(csiescseq.arg[0], 1);
1773 tscrollup(term.top, csiescseq.arg[0]);
1774 break;
1775 case 'T': /* SD -- Scroll <n> line down */
1776 DEFAULT(csiescseq.arg[0], 1);
1777 tscrolldown(term.top, csiescseq.arg[0]);
1778 break;
1779 case 'L': /* IL -- Insert <n> blank lines */
1780 DEFAULT(csiescseq.arg[0], 1);
1781 tinsertblankline(csiescseq.arg[0]);
1782 break;
1783 case 'l': /* RM -- Reset Mode */
1784 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
1785 break;
1786 case 'M': /* DL -- Delete <n> lines */
1787 DEFAULT(csiescseq.arg[0], 1);
1788 tdeleteline(csiescseq.arg[0]);
1789 break;
1790 case 'X': /* ECH -- Erase <n> char */
1791 DEFAULT(csiescseq.arg[0], 1);
1792 tclearregion(term.c.x, term.c.y,
1793 term.c.x + csiescseq.arg[0] - 1, term.c.y, 1);
1794 break;
1795 case 'P': /* DCH -- Delete <n> char */
1796 DEFAULT(csiescseq.arg[0], 1);
1797 tdeletechar(csiescseq.arg[0]);
1798 break;
1799 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
1800 DEFAULT(csiescseq.arg[0], 1);
1801 while(csiescseq.arg[0]--)
1802 tputtab(0);
1803 break;
1804 case 'd': /* VPA -- Move to <row> */
1805 DEFAULT(csiescseq.arg[0], 1);
1806 tmoveato(term.c.x, csiescseq.arg[0]-1);
1807 break;
1808 case 'h': /* SM -- Set terminal mode */
1809 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
1810 break;
1811 case 'm': /* SGR -- Terminal attribute (color) */
1812 tsetattr(csiescseq.arg, csiescseq.narg);
1813 break;
1814 case 'r': /* DECSTBM -- Set Scrolling Region */
1815 if(csiescseq.priv) {
1816 goto unknown;
1817 } else {
1818 DEFAULT(csiescseq.arg[0], 1);
1819 DEFAULT(csiescseq.arg[1], term.row);
1820 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
1821 tmoveato(0, 0);
1822 }
1823 break;
1824 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1825 tcursor(CURSOR_SAVE);
1826 break;
1827 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1828 tcursor(CURSOR_LOAD);
1829 break;
1830 }
1831 }
1832
1833 void
1834 csidump(void) {
1835 int i;
1836 uint c;
1837
1838 printf("ESC[");
1839 for(i = 0; i < csiescseq.len; i++) {
1840 c = csiescseq.buf[i] & 0xff;
1841 if(isprint(c)) {
1842 putchar(c);
1843 } else if(c == '\n') {
1844 printf("(\\n)");
1845 } else if(c == '\r') {
1846 printf("(\\r)");
1847 } else if(c == 0x1b) {
1848 printf("(\\e)");
1849 } else {
1850 printf("(%02x)", c);
1851 }
1852 }
1853 putchar('\n');
1854 }
1855
1856 void
1857 csireset(void) {
1858 memset(&csiescseq, 0, sizeof(csiescseq));
1859 }
1860
1861 void
1862 strhandle(void) {
1863 char *p = NULL;
1864 int i, j, narg;
1865 XTextProperty prop;
1866
1867 strparse();
1868 narg = strescseq.narg;
1869
1870 switch(strescseq.type) {
1871 case ']': /* OSC -- Operating System Command */
1872 switch(i = atoi(strescseq.args[0])) {
1873 case 0:
1874 case 1:
1875 case 2:
1876 if(narg > 1) {
1877 p += 2;
1878 Xutf8TextListToTextProperty(xw.dpy, &p, 1,
1879 XUTF8StringStyle, &prop);
1880 XSetWMName(xw.dpy, xw.win, &prop);
1881 }
1882 break;
1883 case 4: /* color set */
1884 if(narg < 3)
1885 break;
1886 p = strescseq.args[2];
1887 /* fall through */
1888 case 104: /* color reset, here p = NULL */
1889 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
1890 if (!xsetcolorname(j, p)) {
1891 fprintf(stderr, "erresc: invalid color %s\n", p);
1892 } else {
1893 redraw(0); /* TODO if defaultbg color is changed, borders are dirty */
1894 }
1895 break;
1896 default:
1897 fprintf(stderr, "erresc: unknown str ");
1898 strdump();
1899 break;
1900 }
1901 break;
1902 case 'k': /* old title set compatibility */
1903 p += 1;
1904 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
1905 &prop);
1906 XSetWMName(xw.dpy, xw.win, &prop);
1907 break;
1908 case 'P': /* DSC -- Device Control String */
1909 case '_': /* APC -- Application Program Command */
1910 case '^': /* PM -- Privacy Message */
1911 default:
1912 fprintf(stderr, "erresc: unknown str ");
1913 strdump();
1914 /* die(""); */
1915 break;
1916 }
1917 }
1918
1919 void
1920 strparse(void) {
1921 /*
1922 * TODO: Implement parsing like for CSI when required.
1923 * Format: ESC type cmd ';' arg0 [';' argn] ESC \
1924 */
1925 int narg = 0;
1926 char *start = strescseq.buf, *end = start + strescseq.len;
1927 strescseq.args[0] = start;
1928 while(start < end && narg < LEN(strescseq.args)) {
1929 start = memchr(start, ';', end - start);
1930 if(!start)
1931 break;
1932 *start++ = '\0';
1933 if(start < end) {
1934 strescseq.args[++narg] = start;
1935 }
1936 }
1937 strescseq.narg = narg + 1;
1938 }
1939
1940 void
1941 strdump(void) {
1942 int i;
1943 uint c;
1944
1945 printf("ESC%c", strescseq.type);
1946 for(i = 0; i < strescseq.len; i++) {
1947 c = strescseq.buf[i] & 0xff;
1948 if(isprint(c)) {
1949 putchar(c);
1950 } else if(c == '\n') {
1951 printf("(\\n)");
1952 } else if(c == '\r') {
1953 printf("(\\r)");
1954 } else if(c == 0x1b) {
1955 printf("(\\e)");
1956 } else {
1957 printf("(%02x)", c);
1958 }
1959 }
1960 printf("ESC\\\n");
1961 }
1962
1963 void
1964 strreset(void) {
1965 memset(&strescseq, 0, sizeof(strescseq));
1966 }
1967
1968 void
1969 tputtab(bool forward) {
1970 uint x = term.c.x;
1971
1972 if(forward) {
1973 if(x == term.col)
1974 return;
1975 for(++x; x < term.col && !term.tabs[x]; ++x)
1976 /* nothing */ ;
1977 } else {
1978 if(x == 0)
1979 return;
1980 for(--x; x > 0 && !term.tabs[x]; --x)
1981 /* nothing */ ;
1982 }
1983 tmoveto(x, term.c.y);
1984 }
1985
1986 void
1987 techo(char *buf, int len) {
1988 for(; len > 0; buf++, len--) {
1989 char c = *buf;
1990
1991 if(c == '\033') { /* escape */
1992 tputc("^", 1);
1993 tputc("[", 1);
1994 } else if(c < '\x20') { /* control code */
1995 if(c != '\n' && c != '\r' && c != '\t') {
1996 c |= '\x40';
1997 tputc("^", 1);
1998 }
1999 tputc(&c, 1);
2000 } else {
2001 break;
2002 }
2003 }
2004 if(len)
2005 tputc(buf, len);
2006 }
2007
2008 void
2009 tputc(char *c, int len) {
2010 uchar ascii = *c;
2011 bool control = ascii < '\x20' || ascii == 0177;
2012
2013 if(iofd != -1) {
2014 if(xwrite(iofd, c, len) < 0) {
2015 fprintf(stderr, "Error writing in %s:%s\n",
2016 opt_io, strerror(errno));
2017 close(iofd);
2018 iofd = -1;
2019 }
2020 }
2021
2022 /*
2023 * STR sequences must be checked before anything else
2024 * because it can use some control codes as part of the sequence.
2025 */
2026 if(term.esc & ESC_STR) {
2027 switch(ascii) {
2028 case '\033':
2029 term.esc = ESC_START | ESC_STR_END;
2030 break;
2031 case '\a': /* backwards compatibility to xterm */
2032 term.esc = 0;
2033 strhandle();
2034 break;
2035 default:
2036 if(strescseq.len + len < sizeof(strescseq.buf)) {
2037 memmove(&strescseq.buf[strescseq.len], c, len);
2038 strescseq.len += len;
2039 } else {
2040 /*
2041 * Here is a bug in terminals. If the user never sends
2042 * some code to stop the str or esc command, then st
2043 * will stop responding. But this is better than
2044 * silently failing with unknown characters. At least
2045 * then users will report back.
2046 *
2047 * In the case users ever get fixed, here is the code:
2048 */
2049 /*
2050 * term.esc = 0;
2051 * strhandle();
2052 */
2053 }
2054 }
2055 return;
2056 }
2057
2058 /*
2059 * Actions of control codes must be performed as soon they arrive
2060 * because they can be embedded inside a control sequence, and
2061 * they must not cause conflicts with sequences.
2062 */
2063 if(control) {
2064 switch(ascii) {
2065 case '\t': /* HT */
2066 tputtab(1);
2067 return;
2068 case '\b': /* BS */
2069 tmoveto(term.c.x-1, term.c.y);
2070 return;
2071 case '\r': /* CR */
2072 tmoveto(0, term.c.y);
2073 return;
2074 case '\f': /* LF */
2075 case '\v': /* VT */
2076 case '\n': /* LF */
2077 /* go to first col if the mode is set */
2078 tnewline(IS_SET(MODE_CRLF));
2079 return;
2080 case '\a': /* BEL */
2081 if(!(xw.state & WIN_FOCUSED))
2082 xseturgency(1);
2083 return;
2084 case '\033': /* ESC */
2085 csireset();
2086 term.esc = ESC_START;
2087 return;
2088 case '\016': /* SO */
2089 case '\017': /* SI */
2090 /*
2091 * Different charsets are hard to handle. Applications
2092 * should use the right alt charset escapes for the
2093 * only reason they still exist: line drawing. The
2094 * rest is incompatible history st should not support.
2095 */
2096 return;
2097 case '\032': /* SUB */
2098 case '\030': /* CAN */
2099 csireset();
2100 return;
2101 case '\005': /* ENQ (IGNORED) */
2102 case '\000': /* NUL (IGNORED) */
2103 case '\021': /* XON (IGNORED) */
2104 case '\023': /* XOFF (IGNORED) */
2105 case 0177: /* DEL (IGNORED) */
2106 return;
2107 }
2108 } else if(term.esc & ESC_START) {
2109 if(term.esc & ESC_CSI) {
2110 csiescseq.buf[csiescseq.len++] = ascii;
2111 if(BETWEEN(ascii, 0x40, 0x7E)
2112 || csiescseq.len >= ESC_BUF_SIZ) {
2113 term.esc = 0;
2114 csiparse(), csihandle();
2115 }
2116 } else if(term.esc & ESC_STR_END) {
2117 term.esc = 0;
2118 if(ascii == '\\')
2119 strhandle();
2120 } else if(term.esc & ESC_ALTCHARSET) {
2121 switch(ascii) {
2122 case '0': /* Line drawing set */
2123 term.c.attr.mode |= ATTR_GFX;
2124 break;
2125 case 'B': /* USASCII */
2126 term.c.attr.mode &= ~ATTR_GFX;
2127 break;
2128 case 'A': /* UK (IGNORED) */
2129 case '<': /* multinational charset (IGNORED) */
2130 case '5': /* Finnish (IGNORED) */
2131 case 'C': /* Finnish (IGNORED) */
2132 case 'K': /* German (IGNORED) */
2133 break;
2134 default:
2135 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2136 }
2137 term.esc = 0;
2138 } else if(term.esc & ESC_TEST) {
2139 if(ascii == '8') { /* DEC screen alignment test. */
2140 char E[UTF_SIZ] = "E";
2141 int x, y;
2142
2143 for(x = 0; x < term.col; ++x) {
2144 for(y = 0; y < term.row; ++y)
2145 tsetchar(E, &term.c.attr, x, y);
2146 }
2147 }
2148 term.esc = 0;
2149 } else {
2150 switch(ascii) {
2151 case '[':
2152 term.esc |= ESC_CSI;
2153 break;
2154 case '#':
2155 term.esc |= ESC_TEST;
2156 break;
2157 case 'P': /* DCS -- Device Control String */
2158 case '_': /* APC -- Application Program Command */
2159 case '^': /* PM -- Privacy Message */
2160 case ']': /* OSC -- Operating System Command */
2161 case 'k': /* old title set compatibility */
2162 strreset();
2163 strescseq.type = ascii;
2164 term.esc |= ESC_STR;
2165 break;
2166 case '(': /* set primary charset G0 */
2167 term.esc |= ESC_ALTCHARSET;
2168 break;
2169 case ')': /* set secondary charset G1 (IGNORED) */
2170 case '*': /* set tertiary charset G2 (IGNORED) */
2171 case '+': /* set quaternary charset G3 (IGNORED) */
2172 term.esc = 0;
2173 break;
2174 case 'D': /* IND -- Linefeed */
2175 if(term.c.y == term.bot) {
2176 tscrollup(term.top, 1);
2177 } else {
2178 tmoveto(term.c.x, term.c.y+1);
2179 }
2180 term.esc = 0;
2181 break;
2182 case 'E': /* NEL -- Next line */
2183 tnewline(1); /* always go to first col */
2184 term.esc = 0;
2185 break;
2186 case 'H': /* HTS -- Horizontal tab stop */
2187 term.tabs[term.c.x] = 1;
2188 term.esc = 0;
2189 break;
2190 case 'M': /* RI -- Reverse index */
2191 if(term.c.y == term.top) {
2192 tscrolldown(term.top, 1);
2193 } else {
2194 tmoveto(term.c.x, term.c.y-1);
2195 }
2196 term.esc = 0;
2197 break;
2198 case 'Z': /* DECID -- Identify Terminal */
2199 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2200 term.esc = 0;
2201 break;
2202 case 'c': /* RIS -- Reset to inital state */
2203 treset();
2204 term.esc = 0;
2205 xresettitle();
2206 break;
2207 case '=': /* DECPAM -- Application keypad */
2208 term.mode |= MODE_APPKEYPAD;
2209 term.esc = 0;
2210 break;
2211 case '>': /* DECPNM -- Normal keypad */
2212 term.mode &= ~MODE_APPKEYPAD;
2213 term.esc = 0;
2214 break;
2215 case '7': /* DECSC -- Save Cursor */
2216 tcursor(CURSOR_SAVE);
2217 term.esc = 0;
2218 break;
2219 case '8': /* DECRC -- Restore Cursor */
2220 tcursor(CURSOR_LOAD);
2221 term.esc = 0;
2222 break;
2223 case '\\': /* ST -- Stop */
2224 term.esc = 0;
2225 break;
2226 default:
2227 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2228 (uchar) ascii, isprint(ascii)? ascii:'.');
2229 term.esc = 0;
2230 }
2231 }
2232 /*
2233 * All characters which form part of a sequence are not
2234 * printed
2235 */
2236 return;
2237 }
2238 /*
2239 * Display control codes only if we are in graphic mode
2240 */
2241 if(control && !(term.c.attr.mode & ATTR_GFX))
2242 return;
2243 if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
2244 sel.bx = -1;
2245 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
2246 tnewline(1); /* always go to first col */
2247
2248 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col) {
2249 memmove(&term.line[term.c.y][term.c.x+1],
2250 &term.line[term.c.y][term.c.x],
2251 (term.col - term.c.x - 1) * sizeof(Glyph));
2252 }
2253
2254 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2255 if(term.c.x+1 < term.col) {
2256 tmoveto(term.c.x+1, term.c.y);
2257 } else {
2258 term.c.state |= CURSOR_WRAPNEXT;
2259 }
2260 }
2261
2262 int
2263 tresize(int col, int row) {
2264 int i, x;
2265 int minrow = MIN(row, term.row);
2266 int mincol = MIN(col, term.col);
2267 int slide = term.c.y - row + 1;
2268 bool *bp;
2269
2270 if(col < 1 || row < 1)
2271 return 0;
2272
2273 /* free unneeded rows */
2274 i = 0;
2275 if(slide > 0) {
2276 /*
2277 * slide screen to keep cursor where we expect it -
2278 * tscrollup would work here, but we can optimize to
2279 * memmove because we're freeing the earlier lines
2280 */
2281 for(/* i = 0 */; i < slide; i++) {
2282 free(term.line[i]);
2283 free(term.alt[i]);
2284 }
2285 memmove(term.line, term.line + slide, row * sizeof(Line));
2286 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2287 }
2288 for(i += row; i < term.row; i++) {
2289 free(term.line[i]);
2290 free(term.alt[i]);
2291 }
2292
2293 /* resize to new height */
2294 term.line = xrealloc(term.line, row * sizeof(Line));
2295 term.alt = xrealloc(term.alt, row * sizeof(Line));
2296 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2297 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2298
2299 /* resize each row to new width, zero-pad if needed */
2300 for(i = 0; i < minrow; i++) {
2301 term.dirty[i] = 1;
2302 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2303 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2304 for(x = mincol; x < col; x++) {
2305 term.line[i][x].state = 0;
2306 term.alt[i][x].state = 0;
2307 }
2308 }
2309
2310 /* allocate any new rows */
2311 for(/* i == minrow */; i < row; i++) {
2312 term.dirty[i] = 1;
2313 term.line[i] = xcalloc(col, sizeof(Glyph));
2314 term.alt [i] = xcalloc(col, sizeof(Glyph));
2315 }
2316 if(col > term.col) {
2317 bp = term.tabs + term.col;
2318
2319 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2320 while(--bp > term.tabs && !*bp)
2321 /* nothing */ ;
2322 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2323 *bp = 1;
2324 }
2325 /* update terminal size */
2326 term.col = col;
2327 term.row = row;
2328 /* reset scrolling region */
2329 tsetscroll(0, row-1);
2330 /* make use of the LIMIT in tmoveto */
2331 tmoveto(term.c.x, term.c.y);
2332
2333 return (slide > 0);
2334 }
2335
2336 void
2337 xresize(int col, int row) {
2338 xw.tw = MAX(1, col * xw.cw);
2339 xw.th = MAX(1, row * xw.ch);
2340
2341 if(!usedbe) {
2342 XFreePixmap(xw.dpy, xw.buf);
2343 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2344 DefaultDepth(xw.dpy, xw.scr));
2345 XSetForeground(xw.dpy, dc.gc, dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg].pixel);
2346 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
2347 }
2348
2349 XftDrawChange(xw.draw, xw.buf);
2350 }
2351
2352 static inline ushort
2353 sixd_to_16bit(int x) {
2354 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2355 }
2356
2357 void
2358 xloadcols(void) {
2359 int i, r, g, b;
2360 XRenderColor color = { .alpha = 0xffff };
2361
2362 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
2363 for(i = 0; i < LEN(colorname); i++) {
2364 if(!colorname[i])
2365 continue;
2366 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2367 die("Could not allocate color '%s'\n", colorname[i]);
2368 }
2369 }
2370
2371 /* load colors [16-255] ; same colors as xterm */
2372 for(i = 16, r = 0; r < 6; r++) {
2373 for(g = 0; g < 6; g++) {
2374 for(b = 0; b < 6; b++) {
2375 color.red = sixd_to_16bit(r);
2376 color.green = sixd_to_16bit(g);
2377 color.blue = sixd_to_16bit(b);
2378 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i])) {
2379 die("Could not allocate color %d\n", i);
2380 }
2381 i++;
2382 }
2383 }
2384 }
2385
2386 for(r = 0; r < 24; r++, i++) {
2387 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
2388 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color,
2389 &dc.col[i])) {
2390 die("Could not allocate color %d\n", i);
2391 }
2392 }
2393 }
2394
2395 int
2396 xsetcolorname(int x, const char *name) {
2397 XRenderColor color = { .alpha = 0xffff };
2398 Colour colour;
2399 if (x < 0 || x > LEN(colorname))
2400 return -1;
2401 if(!name) {
2402 if(16 <= x && x < 16 + 216) {
2403 int r = (x - 16) / 36, g = ((x - 16) % 36) / 6, b = (x - 16) % 6;
2404 color.red = sixd_to_16bit(r);
2405 color.green = sixd_to_16bit(g);
2406 color.blue = sixd_to_16bit(b);
2407 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2408 return 0; /* something went wrong */
2409 dc.col[x] = colour;
2410 return 1;
2411 } else if (16 + 216 <= x && x < 256) {
2412 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (x - (16 + 216));
2413 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2414 return 0; /* something went wrong */
2415 dc.col[x] = colour;
2416 return 1;
2417 } else {
2418 name = colorname[x];
2419 }
2420 }
2421 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &colour))
2422 return 0;
2423 dc.col[x] = colour;
2424 return 1;
2425 }
2426
2427 void
2428 xtermclear(int col1, int row1, int col2, int row2) {
2429 XftDrawRect(xw.draw,
2430 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2431 borderpx + col1 * xw.cw,
2432 borderpx + row1 * xw.ch,
2433 (col2-col1+1) * xw.cw,
2434 (row2-row1+1) * xw.ch);
2435 }
2436
2437 /*
2438 * Absolute coordinates.
2439 */
2440 void
2441 xclear(int x1, int y1, int x2, int y2) {
2442 XftDrawRect(xw.draw,
2443 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2444 x1, y1, x2-x1, y2-y1);
2445 }
2446
2447 void
2448 xhints(void) {
2449 XClassHint class = {opt_class ? opt_class : termname, termname};
2450 XWMHints wm = {.flags = InputHint, .input = 1};
2451 XSizeHints *sizeh = NULL;
2452
2453 sizeh = XAllocSizeHints();
2454 if(xw.isfixed == False) {
2455 sizeh->flags = PSize | PResizeInc | PBaseSize;
2456 sizeh->height = xw.h;
2457 sizeh->width = xw.w;
2458 sizeh->height_inc = xw.ch;
2459 sizeh->width_inc = xw.cw;
2460 sizeh->base_height = 2 * borderpx;
2461 sizeh->base_width = 2 * borderpx;
2462 } else {
2463 sizeh->flags = PMaxSize | PMinSize;
2464 sizeh->min_width = sizeh->max_width = xw.fw;
2465 sizeh->min_height = sizeh->max_height = xw.fh;
2466 }
2467
2468 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
2469 XFree(sizeh);
2470 }
2471
2472 int
2473 xloadfont(Font *f, FcPattern *pattern) {
2474 FcPattern *match;
2475 FcResult result;
2476
2477 match = FcFontMatch(NULL, pattern, &result);
2478 if(!match)
2479 return 1;
2480
2481 if(!(f->set = FcFontSort(0, match, FcTrue, 0, &result))) {
2482 FcPatternDestroy(match);
2483 return 1;
2484 }
2485
2486 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2487 FcPatternDestroy(match);
2488 return 1;
2489 }
2490
2491 f->pattern = FcPatternDuplicate(pattern);
2492
2493 f->ascent = f->match->ascent;
2494 f->descent = f->match->descent;
2495 f->lbearing = 0;
2496 f->rbearing = f->match->max_advance_width;
2497
2498 f->height = f->match->height;
2499 f->width = f->lbearing + f->rbearing;
2500
2501 return 0;
2502 }
2503
2504 void
2505 xloadfonts(char *fontstr, int fontsize) {
2506 FcPattern *pattern;
2507 FcResult result;
2508 double fontval;
2509
2510 if(fontstr[0] == '-') {
2511 pattern = XftXlfdParse(fontstr, False, False);
2512 } else {
2513 pattern = FcNameParse((FcChar8 *)fontstr);
2514 }
2515
2516 if(!pattern)
2517 die("st: can't open font %s\n", fontstr);
2518
2519 if(fontsize > 0) {
2520 FcPatternDel(pattern, FC_PIXEL_SIZE);
2521 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2522 usedfontsize = fontsize;
2523 } else {
2524 result = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2525 if(result == FcResultMatch) {
2526 usedfontsize = (int)fontval;
2527 } else {
2528 /*
2529 * Default font size is 12, if none given. This is to
2530 * have a known usedfontsize value.
2531 */
2532 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
2533 usedfontsize = 12;
2534 }
2535 }
2536
2537 FcConfigSubstitute(0, pattern, FcMatchPattern);
2538 FcDefaultSubstitute(pattern);
2539
2540 if(xloadfont(&dc.font, pattern))
2541 die("st: can't open font %s\n", fontstr);
2542
2543 /* Setting character width and height. */
2544 xw.cw = dc.font.width;
2545 xw.ch = dc.font.height;
2546
2547 FcPatternDel(pattern, FC_SLANT);
2548 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
2549 if(xloadfont(&dc.ifont, pattern))
2550 die("st: can't open font %s\n", fontstr);
2551
2552 FcPatternDel(pattern, FC_WEIGHT);
2553 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
2554 if(xloadfont(&dc.ibfont, pattern))
2555 die("st: can't open font %s\n", fontstr);
2556
2557 FcPatternDel(pattern, FC_SLANT);
2558 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
2559 if(xloadfont(&dc.bfont, pattern))
2560 die("st: can't open font %s\n", fontstr);
2561
2562 FcPatternDestroy(pattern);
2563 }
2564
2565 void
2566 xunloadfonts(void) {
2567 int i, ip;
2568
2569 /*
2570 * Free the loaded fonts in the font cache. This is done backwards
2571 * from the frccur.
2572 */
2573 for(i = 0, ip = frccur; i < frclen; i++, ip--) {
2574 if(ip < 0)
2575 ip = LEN(frc) - 1;
2576 XftFontClose(xw.dpy, frc[ip].font);
2577 }
2578 frccur = -1;
2579 frclen = 0;
2580
2581 XftFontClose(xw.dpy, dc.font.match);
2582 FcPatternDestroy(dc.font.pattern);
2583 FcFontSetDestroy(dc.font.set);
2584 XftFontClose(xw.dpy, dc.bfont.match);
2585 FcPatternDestroy(dc.bfont.pattern);
2586 FcFontSetDestroy(dc.bfont.set);
2587 XftFontClose(xw.dpy, dc.ifont.match);
2588 FcPatternDestroy(dc.ifont.pattern);
2589 FcFontSetDestroy(dc.ifont.set);
2590 XftFontClose(xw.dpy, dc.ibfont.match);
2591 FcPatternDestroy(dc.ibfont.pattern);
2592 FcFontSetDestroy(dc.ibfont.set);
2593 }
2594
2595 void
2596 xzoom(const Arg *arg) {
2597 xunloadfonts();
2598 xloadfonts(usedfont, usedfontsize + arg->i);
2599 cresize(0, 0);
2600 redraw(0);
2601 }
2602
2603 void
2604 xinit(void) {
2605 XSetWindowAttributes attrs;
2606 XGCValues gcvalues;
2607 Cursor cursor;
2608 Window parent;
2609 int sw, sh, major, minor;
2610
2611 if(!(xw.dpy = XOpenDisplay(NULL)))
2612 die("Can't open display\n");
2613 xw.scr = XDefaultScreen(xw.dpy);
2614 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
2615
2616 /* font */
2617 if(!FcInit())
2618 die("Could not init fontconfig.\n");
2619
2620 usedfont = (opt_font == NULL)? font : opt_font;
2621 xloadfonts(usedfont, 0);
2622
2623 /* colors */
2624 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
2625 xloadcols();
2626
2627 /* adjust fixed window geometry */
2628 if(xw.isfixed) {
2629 sw = DisplayWidth(xw.dpy, xw.scr);
2630 sh = DisplayHeight(xw.dpy, xw.scr);
2631 if(xw.fx < 0)
2632 xw.fx = sw + xw.fx - xw.fw - 1;
2633 if(xw.fy < 0)
2634 xw.fy = sh + xw.fy - xw.fh - 1;
2635
2636 xw.h = xw.fh;
2637 xw.w = xw.fw;
2638 } else {
2639 /* window - default size */
2640 xw.h = 2 * borderpx + term.row * xw.ch;
2641 xw.w = 2 * borderpx + term.col * xw.cw;
2642 xw.fx = 0;
2643 xw.fy = 0;
2644 }
2645
2646 /* Events */
2647 attrs.background_pixel = dc.col[defaultbg].pixel;
2648 attrs.border_pixel = dc.col[defaultbg].pixel;
2649 attrs.bit_gravity = NorthWestGravity;
2650 attrs.event_mask = FocusChangeMask | KeyPressMask
2651 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
2652 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
2653 attrs.colormap = xw.cmap;
2654
2655 parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
2656 XRootWindow(xw.dpy, xw.scr);
2657 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
2658 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
2659 xw.vis,
2660 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
2661 | CWColormap,
2662 &attrs);
2663
2664 /* double buffering */
2665 /*
2666 if(XdbeQueryExtension(xw.dpy, &major, &minor)) {
2667 xw.buf = XdbeAllocateBackBufferName(xw.dpy, xw.win,
2668 XdbeBackground);
2669 usedbe = True;
2670 } else {
2671 */
2672 memset(&gcvalues, 0, sizeof(gcvalues));
2673 gcvalues.graphics_exposures = False;
2674 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
2675 &gcvalues);
2676 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2677 DefaultDepth(xw.dpy, xw.scr));
2678 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
2679 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
2680 //xw.buf = xw.win;
2681 /*
2682 }
2683 */
2684
2685 /* Xft rendering context */
2686 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
2687
2688 /* input methods */
2689 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2690 XSetLocaleModifiers("@im=local");
2691 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2692 XSetLocaleModifiers("@im=");
2693 if((xw.xim = XOpenIM(xw.dpy,
2694 NULL, NULL, NULL)) == NULL) {
2695 die("XOpenIM failed. Could not open input"
2696 " device.\n");
2697 }
2698 }
2699 }
2700 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
2701 | XIMStatusNothing, XNClientWindow, xw.win,
2702 XNFocusWindow, xw.win, NULL);
2703 if(xw.xic == NULL)
2704 die("XCreateIC failed. Could not obtain input method.\n");
2705
2706 /* white cursor, black outline */
2707 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
2708 XDefineCursor(xw.dpy, xw.win, cursor);
2709 XRecolorCursor(xw.dpy, cursor,
2710 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
2711 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
2712
2713 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
2714 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
2715 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
2716
2717 xresettitle();
2718 XMapWindow(xw.dpy, xw.win);
2719 xhints();
2720 XSync(xw.dpy, 0);
2721 }
2722
2723 void
2724 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
2725 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
2726 width = charlen * xw.cw, xp, i;
2727 int frp, frcflags;
2728 int u8fl, u8fblen, u8cblen, doesexist;
2729 char *u8c, *u8fs;
2730 long u8char;
2731 Font *font = &dc.font;
2732 FcResult fcres;
2733 FcPattern *fcpattern, *fontpattern;
2734 FcFontSet *fcsets[] = { NULL };
2735 FcCharSet *fccharset;
2736 Colour *fg = &dc.col[base.fg], *bg = &dc.col[base.bg],
2737 *temp, revfg, revbg;
2738 XRenderColor colfg, colbg;
2739
2740 frcflags = FRC_NORMAL;
2741
2742 if(base.mode & ATTR_BOLD) {
2743 if(BETWEEN(base.fg, 0, 7)) {
2744 /* basic system colors */
2745 fg = &dc.col[base.fg + 8];
2746 } else if(BETWEEN(base.fg, 16, 195)) {
2747 /* 256 colors */
2748 fg = &dc.col[base.fg + 36];
2749 } else if(BETWEEN(base.fg, 232, 251)) {
2750 /* greyscale */
2751 fg = &dc.col[base.fg + 4];
2752 }
2753 /*
2754 * Those ranges will not be brightened:
2755 * 8 - 15 – bright system colors
2756 * 196 - 231 – highest 256 color cube
2757 * 252 - 255 – brightest colors in greyscale
2758 */
2759 font = &dc.bfont;
2760 frcflags = FRC_BOLD;
2761 }
2762
2763 if(base.mode & ATTR_ITALIC) {
2764 font = &dc.ifont;
2765 frcflags = FRC_ITALIC;
2766 }
2767 if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
2768 font = &dc.ibfont;
2769 frcflags = FRC_ITALICBOLD;
2770 }
2771
2772 if(IS_SET(MODE_REVERSE)) {
2773 if(fg == &dc.col[defaultfg]) {
2774 fg = &dc.col[defaultbg];
2775 } else {
2776 colfg.red = ~fg->color.red;
2777 colfg.green = ~fg->color.green;
2778 colfg.blue = ~fg->color.blue;
2779 colfg.alpha = fg->color.alpha;
2780 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
2781 fg = &revfg;
2782 }
2783
2784 if(bg == &dc.col[defaultbg]) {
2785 bg = &dc.col[defaultfg];
2786 } else {
2787 colbg.red = ~bg->color.red;
2788 colbg.green = ~bg->color.green;
2789 colbg.blue = ~bg->color.blue;
2790 colbg.alpha = bg->color.alpha;
2791 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &revbg);
2792 bg = &revbg;
2793 }
2794 }
2795
2796 if(base.mode & ATTR_REVERSE) {
2797 temp = fg;
2798 fg = bg;
2799 bg = temp;
2800 }
2801
2802 /* Intelligent cleaning up of the borders. */
2803 if(x == 0) {
2804 xclear(0, (y == 0)? 0 : winy, borderpx,
2805 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
2806 }
2807 if(x + charlen >= term.col) {
2808 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
2809 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
2810 }
2811 if(y == 0)
2812 xclear(winx, 0, winx + width, borderpx);
2813 if(y == term.row-1)
2814 xclear(winx, winy + xw.ch, winx + width, xw.h);
2815
2816 /* Clean up the region we want to draw to. */
2817 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
2818
2819 fcsets[0] = font->set;
2820 for(xp = winx; bytelen > 0;) {
2821 /*
2822 * Search for the range in the to be printed string of glyphs
2823 * that are in the main font. Then print that range. If
2824 * some glyph is found that is not in the font, do the
2825 * fallback dance.
2826 */
2827 u8fs = s;
2828 u8fblen = 0;
2829 u8fl = 0;
2830 for(;;) {
2831 u8c = s;
2832 u8cblen = utf8decode(s, &u8char);
2833 s += u8cblen;
2834 bytelen -= u8cblen;
2835
2836 doesexist = XftCharIndex(xw.dpy, font->match, u8char);
2837 if(!doesexist || bytelen <= 0) {
2838 if(bytelen <= 0) {
2839 if(doesexist) {
2840 u8fl++;
2841 u8fblen += u8cblen;
2842 }
2843 }
2844
2845 if(u8fl > 0) {
2846 XftDrawStringUtf8(xw.draw, fg,
2847 font->match, xp,
2848 winy + font->ascent,
2849 (FcChar8 *)u8fs,
2850 u8fblen);
2851 xp += font->width * u8fl;
2852 }
2853 break;
2854 }
2855
2856 u8fl++;
2857 u8fblen += u8cblen;
2858 }
2859 if(doesexist)
2860 break;
2861
2862 frp = frccur;
2863 /* Search the font cache. */
2864 for(i = 0; i < frclen; i++, frp--) {
2865 if(frp <= 0)
2866 frp = LEN(frc) - 1;
2867
2868 if(frc[frp].c == u8char
2869 && frc[frp].flags == frcflags) {
2870 break;
2871 }
2872 }
2873
2874 /* Nothing was found. */
2875 if(i >= frclen) {
2876 /*
2877 * Nothing was found in the cache. Now use
2878 * some dozen of Fontconfig calls to get the
2879 * font for one single character.
2880 */
2881 fcpattern = FcPatternDuplicate(font->pattern);
2882 fccharset = FcCharSetCreate();
2883
2884 FcCharSetAddChar(fccharset, u8char);
2885 FcPatternAddCharSet(fcpattern, FC_CHARSET,
2886 fccharset);
2887 FcPatternAddBool(fcpattern, FC_SCALABLE,
2888 FcTrue);
2889
2890 FcConfigSubstitute(0, fcpattern,
2891 FcMatchPattern);
2892 FcDefaultSubstitute(fcpattern);
2893
2894 fontpattern = FcFontSetMatch(0, fcsets,
2895 FcTrue, fcpattern, &fcres);
2896
2897 /*
2898 * Overwrite or create the new cache entry
2899 * entry.
2900 */
2901 frccur++;
2902 frclen++;
2903 if(frccur >= LEN(frc))
2904 frccur = 0;
2905 if(frclen > LEN(frc)) {
2906 frclen = LEN(frc);
2907 XftFontClose(xw.dpy, frc[frccur].font);
2908 }
2909
2910 frc[frccur].font = XftFontOpenPattern(xw.dpy,
2911 fontpattern);
2912 frc[frccur].c = u8char;
2913 frc[frccur].flags = frcflags;
2914
2915 FcPatternDestroy(fcpattern);
2916 FcCharSetDestroy(fccharset);
2917
2918 frp = frccur;
2919 }
2920
2921 XftDrawStringUtf8(xw.draw, fg, frc[frp].font,
2922 xp, winy + frc[frp].font->ascent,
2923 (FcChar8 *)u8c, u8cblen);
2924
2925 xp += font->width;
2926 }
2927
2928 /*
2929 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
2930 winy + font->ascent, (FcChar8 *)s, bytelen);
2931 */
2932
2933 if(base.mode & ATTR_UNDERLINE) {
2934 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
2935 width, 1);
2936 }
2937 }
2938
2939 void
2940 xdrawcursor(void) {
2941 static int oldx = 0, oldy = 0;
2942 int sl;
2943 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs, 0};
2944
2945 LIMIT(oldx, 0, term.col-1);
2946 LIMIT(oldy, 0, term.row-1);
2947
2948 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
2949 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
2950
2951 /* remove the old cursor */
2952 if(term.line[oldy][oldx].state & GLYPH_SET) {
2953 sl = utf8size(term.line[oldy][oldx].c);
2954 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
2955 oldy, 1, sl);
2956 } else {
2957 xtermclear(oldx, oldy, oldx, oldy);
2958 }
2959
2960 /* draw the new one */
2961 if(!(IS_SET(MODE_HIDE))) {
2962 if(!(xw.state & WIN_FOCUSED))
2963 g.bg = defaultucs;
2964
2965 if(IS_SET(MODE_REVERSE))
2966 g.mode |= ATTR_REVERSE, g.fg = defaultcs, g.bg = defaultfg;
2967
2968 sl = utf8size(g.c);
2969 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
2970 oldx = term.c.x, oldy = term.c.y;
2971 }
2972 }
2973
2974 void
2975 xresettitle(void) {
2976 XStoreName(xw.dpy, xw.win, opt_title ? opt_title : "st");
2977 }
2978
2979 void
2980 redraw(int timeout) {
2981 struct timespec tv = {0, timeout * 1000};
2982
2983 tfulldirt();
2984 draw();
2985
2986 if(timeout > 0) {
2987 nanosleep(&tv, NULL);
2988 XSync(xw.dpy, False); /* necessary for a good tput flash */
2989 }
2990 }
2991
2992 void
2993 draw(void) {
2994 XdbeSwapInfo swpinfo[1] = {{xw.win, XdbeCopied}};
2995
2996 drawregion(0, 0, term.col, term.row);
2997 if(usedbe) {
2998 XdbeSwapBuffers(xw.dpy, swpinfo, 1);
2999 } else {
3000 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3001 xw.h, 0, 0);
3002 XSetForeground(xw.dpy, dc.gc, dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg].pixel);
3003 }
3004 }
3005
3006 void
3007 drawregion(int x1, int y1, int x2, int y2) {
3008 int ic, ib, x, y, ox, sl;
3009 Glyph base, new;
3010 char buf[DRAW_BUF_SIZ];
3011 bool ena_sel = sel.bx != -1;
3012
3013 if(sel.alt ^ IS_SET(MODE_ALTSCREEN))
3014 ena_sel = 0;
3015
3016 if(!(xw.state & WIN_VISIBLE))
3017 return;
3018
3019 for(y = y1; y < y2; y++) {
3020 if(!term.dirty[y])
3021 continue;
3022
3023 xtermclear(0, y, term.col, y);
3024 term.dirty[y] = 0;
3025 base = term.line[y][0];
3026 ic = ib = ox = 0;
3027 for(x = x1; x < x2; x++) {
3028 new = term.line[y][x];
3029 if(ena_sel && *(new.c) && selected(x, y))
3030 new.mode ^= ATTR_REVERSE;
3031 if(ib > 0 && (!(new.state & GLYPH_SET)
3032 || ATTRCMP(base, new)
3033 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3034 xdraws(buf, base, ox, y, ic, ib);
3035 ic = ib = 0;
3036 }
3037 if(new.state & GLYPH_SET) {
3038 if(ib == 0) {
3039 ox = x;
3040 base = new;
3041 }
3042
3043 sl = utf8size(new.c);
3044 memcpy(buf+ib, new.c, sl);
3045 ib += sl;
3046 ++ic;
3047 }
3048 }
3049 if(ib > 0)
3050 xdraws(buf, base, ox, y, ic, ib);
3051 }
3052 xdrawcursor();
3053 }
3054
3055 void
3056 expose(XEvent *ev) {
3057 XExposeEvent *e = &ev->xexpose;
3058
3059 if(xw.state & WIN_REDRAW) {
3060 if(!e->count)
3061 xw.state &= ~WIN_REDRAW;
3062 }
3063 redraw(0);
3064 }
3065
3066 void
3067 visibility(XEvent *ev) {
3068 XVisibilityEvent *e = &ev->xvisibility;
3069
3070 if(e->state == VisibilityFullyObscured) {
3071 xw.state &= ~WIN_VISIBLE;
3072 } else if(!(xw.state & WIN_VISIBLE)) {
3073 /* need a full redraw for next Expose, not just a buf copy */
3074 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3075 }
3076 }
3077
3078 void
3079 unmap(XEvent *ev) {
3080 xw.state &= ~WIN_VISIBLE;
3081 }
3082
3083 void
3084 xseturgency(int add) {
3085 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3086
3087 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
3088 XSetWMHints(xw.dpy, xw.win, h);
3089 XFree(h);
3090 }
3091
3092 void
3093 focus(XEvent *ev) {
3094 XFocusChangeEvent *e = &ev->xfocus;
3095
3096 if(e->mode == NotifyGrab)
3097 return;
3098
3099 if(ev->type == FocusIn) {
3100 XSetICFocus(xw.xic);
3101 xw.state |= WIN_FOCUSED;
3102 xseturgency(0);
3103 } else {
3104 XUnsetICFocus(xw.xic);
3105 xw.state &= ~WIN_FOCUSED;
3106 }
3107 }
3108
3109 inline bool
3110 match(uint mask, uint state) {
3111 state &= ~(ignoremod);
3112
3113 if(mask == XK_NO_MOD && state)
3114 return false;
3115 if(mask != XK_ANY_MOD && mask != XK_NO_MOD && !state)
3116 return false;
3117 if((state & mask) != state)
3118 return false;
3119 return true;
3120 }
3121
3122 void
3123 numlock(const Arg *dummy) {
3124 term.numlock ^= 1;
3125 }
3126
3127 char*
3128 kmap(KeySym k, uint state) {
3129 uint mask;
3130 Key *kp;
3131 int i;
3132
3133 /* Check for mapped keys out of X11 function keys. */
3134 for(i = 0; i < LEN(mappedkeys); i++) {
3135 if(mappedkeys[i] == k)
3136 break;
3137 }
3138 if(i == LEN(mappedkeys)) {
3139 if((k & 0xFFFF) < 0xFD00)
3140 return NULL;
3141 }
3142
3143 for(kp = key; kp < key + LEN(key); kp++) {
3144 mask = kp->mask;
3145
3146 if(kp->k != k)
3147 continue;
3148
3149 if(!match(mask, state))
3150 continue;
3151
3152 if(kp->appkey > 0) {
3153 if(!IS_SET(MODE_APPKEYPAD))
3154 continue;
3155 if(term.numlock && kp->appkey == 2)
3156 continue;
3157 } else if(kp->appkey < 0 && IS_SET(MODE_APPKEYPAD)) {
3158 continue;
3159 }
3160
3161 if((kp->appcursor < 0 && IS_SET(MODE_APPCURSOR)) ||
3162 (kp->appcursor > 0
3163 && !IS_SET(MODE_APPCURSOR))) {
3164 continue;
3165 }
3166
3167 if((kp->crlf < 0 && IS_SET(MODE_CRLF)) ||
3168 (kp->crlf > 0 && !IS_SET(MODE_CRLF))) {
3169 continue;
3170 }
3171
3172 return kp->s;
3173 }
3174
3175 return NULL;
3176 }
3177
3178 void
3179 kpress(XEvent *ev) {
3180 XKeyEvent *e = &ev->xkey;
3181 KeySym ksym;
3182 char xstr[31], buf[32], *customkey, *cp = buf;
3183 int len;
3184 Status status;
3185 Shortcut *bp;
3186
3187 if(IS_SET(MODE_KBDLOCK))
3188 return;
3189
3190 len = XmbLookupString(xw.xic, e, xstr, sizeof(xstr), &ksym, &status);
3191 e->state &= ~Mod2Mask;
3192 /* 1. shortcuts */
3193 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3194 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3195 bp->func(&(bp->arg));
3196 return;
3197 }
3198 }
3199
3200 /* 2. custom keys from config.h */
3201 if((customkey = kmap(ksym, e->state))) {
3202 len = strlen(customkey);
3203 memcpy(buf, customkey, len);
3204 /* 2. hardcoded (overrides X lookup) */
3205 } else {
3206 if(len == 0)
3207 return;
3208
3209 if(len == 1 && e->state & Mod1Mask)
3210 *cp++ = '\033';
3211
3212 memcpy(cp, xstr, len);
3213 len = cp - buf + len;
3214 }
3215
3216 ttywrite(buf, len);
3217 if(IS_SET(MODE_ECHO))
3218 techo(buf, len);
3219 }
3220
3221
3222 void
3223 cmessage(XEvent *e) {
3224 /*
3225 * See xembed specs
3226 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3227 */
3228 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3229 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3230 xw.state |= WIN_FOCUSED;
3231 xseturgency(0);
3232 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3233 xw.state &= ~WIN_FOCUSED;
3234 }
3235 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3236 /* Send SIGHUP to shell */
3237 kill(pid, SIGHUP);
3238 exit(EXIT_SUCCESS);
3239 }
3240 }
3241
3242 void
3243 cresize(int width, int height) {
3244 int col, row;
3245
3246 if(width != 0)
3247 xw.w = width;
3248 if(height != 0)
3249 xw.h = height;
3250
3251 col = (xw.w - 2 * borderpx) / xw.cw;
3252 row = (xw.h - 2 * borderpx) / xw.ch;
3253
3254 tresize(col, row);
3255 xresize(col, row);
3256 ttyresize();
3257 }
3258
3259 void
3260 resize(XEvent *e) {
3261 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3262 return;
3263
3264 cresize(e->xconfigure.width, e->xconfigure.height);
3265 }
3266
3267 void
3268 run(void) {
3269 XEvent ev;
3270 fd_set rfd;
3271 int xfd = XConnectionNumber(xw.dpy), xev;
3272 struct timeval drawtimeout, *tv = NULL, now, last;
3273
3274 gettimeofday(&last, NULL);
3275
3276 for(xev = actionfps;;) {
3277 FD_ZERO(&rfd);
3278 FD_SET(cmdfd, &rfd);
3279 FD_SET(xfd, &rfd);
3280 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
3281 if(errno == EINTR)
3282 continue;
3283 die("select failed: %s\n", SERRNO);
3284 }
3285
3286 gettimeofday(&now, NULL);
3287 drawtimeout.tv_sec = 0;
3288 drawtimeout.tv_usec = (1000/xfps) * 1000;
3289 tv = &drawtimeout;
3290
3291 if(FD_ISSET(cmdfd, &rfd))
3292 ttyread();
3293
3294 if(FD_ISSET(xfd, &rfd))
3295 xev = actionfps;
3296
3297 if(TIMEDIFF(now, last) > \
3298 (xev ? (1000/xfps) : (1000/actionfps))) {
3299 while(XPending(xw.dpy)) {
3300 XNextEvent(xw.dpy, &ev);
3301 if(XFilterEvent(&ev, None))
3302 continue;
3303 if(handler[ev.type])
3304 (handler[ev.type])(&ev);
3305 }
3306
3307 draw();
3308 XFlush(xw.dpy);
3309 last = now;
3310
3311 if(xev && !FD_ISSET(xfd, &rfd))
3312 xev--;
3313 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd))
3314 tv = NULL;
3315 }
3316 }
3317 }
3318
3319 int
3320 main(int argc, char *argv[]) {
3321 int i, bitm, xr, yr;
3322 uint wr, hr;
3323
3324 xw.fw = xw.fh = xw.fx = xw.fy = 0;
3325 xw.isfixed = False;
3326
3327 for(i = 1; i < argc; i++) {
3328 switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
3329 case 'c':
3330 if(++i < argc)
3331 opt_class = argv[i];
3332 break;
3333 case 'e':
3334 /* eat all remaining arguments */
3335 if(++i < argc)
3336 opt_cmd = &argv[i];
3337 goto run;
3338 case 'f':
3339 if(++i < argc)
3340 opt_font = argv[i];
3341 break;
3342 case 'g':
3343 if(++i >= argc)
3344 break;
3345
3346 bitm = XParseGeometry(argv[i], &xr, &yr, &wr, &hr);
3347 if(bitm & XValue)
3348 xw.fx = xr;
3349 if(bitm & YValue)
3350 xw.fy = yr;
3351 if(bitm & WidthValue)
3352 xw.fw = (int)wr;
3353 if(bitm & HeightValue)
3354 xw.fh = (int)hr;
3355 if(bitm & XNegative && xw.fx == 0)
3356 xw.fx = -1;
3357 if(bitm & XNegative && xw.fy == 0)
3358 xw.fy = -1;
3359
3360 if(xw.fh != 0 && xw.fw != 0)
3361 xw.isfixed = True;
3362 break;
3363 case 'o':
3364 if(++i < argc)
3365 opt_io = argv[i];
3366 break;
3367 case 't':
3368 if(++i < argc)
3369 opt_title = argv[i];
3370 break;
3371 case 'v':
3372 default:
3373 die(USAGE);
3374 case 'w':
3375 if(++i < argc)
3376 opt_embed = argv[i];
3377 break;
3378 }
3379 }
3380
3381 run:
3382 setlocale(LC_CTYPE, "");
3383 XSetLocaleModifiers("");
3384 tnew(80, 24);
3385 xinit();
3386 ttynew();
3387 selinit();
3388 run();
3389
3390 return 0;
3391 }
3392