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53c524fb02a5bfebd6c0122c8159daa66d17a0fa
[st.git] / st.c
1 /* See LICENSE for licence details. */
2 #include <ctype.h>
3 #include <errno.h>
4 #include <fcntl.h>
5 #include <limits.h>
6 #include <locale.h>
7 #include <pwd.h>
8 #include <stdarg.h>
9 #include <stdbool.h>
10 #include <stdio.h>
11 #include <stdlib.h>
12 #include <string.h>
13 #include <signal.h>
14 #include <sys/ioctl.h>
15 #include <sys/select.h>
16 #include <sys/stat.h>
17 #include <sys/time.h>
18 #include <sys/types.h>
19 #include <sys/wait.h>
20 #include <time.h>
21 #include <unistd.h>
22 #include <X11/Xatom.h>
23 #include <X11/Xlib.h>
24 #include <X11/Xutil.h>
25 #include <X11/cursorfont.h>
26 #include <X11/keysym.h>
27 #include <X11/Xft/Xft.h>
28 #include <fontconfig/fontconfig.h>
29
30 #include "arg.h"
31
32 char *argv0;
33
34 #define Glyph Glyph_
35 #define Font Font_
36 #define Draw XftDraw *
37 #define Colour XftColor
38 #define Colourmap Colormap
39
40 #if defined(__linux)
41 #include <pty.h>
42 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
43 #include <util.h>
44 #elif defined(__FreeBSD__) || defined(__DragonFly__)
45 #include <libutil.h>
46 #endif
47
48
49 /* XEMBED messages */
50 #define XEMBED_FOCUS_IN 4
51 #define XEMBED_FOCUS_OUT 5
52
53 /* Arbitrary sizes */
54 #define UTF_SIZ 4
55 #define ESC_BUF_SIZ (128*UTF_SIZ)
56 #define ESC_ARG_SIZ 16
57 #define STR_BUF_SIZ ESC_BUF_SIZ
58 #define STR_ARG_SIZ ESC_ARG_SIZ
59 #define DRAW_BUF_SIZ 20*1024
60 #define XK_ANY_MOD UINT_MAX
61 #define XK_NO_MOD 0
62 #define XK_SWITCH_MOD (1<<13)
63
64 #define REDRAW_TIMEOUT (80*1000) /* 80 ms */
65
66 /* macros */
67 #define SERRNO strerror(errno)
68 #define MIN(a, b) ((a) < (b) ? (a) : (b))
69 #define MAX(a, b) ((a) < (b) ? (b) : (a))
70 #define LEN(a) (sizeof(a) / sizeof(a[0]))
71 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
72 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
73 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
74 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
75 #define IS_SET(flag) ((term.mode & (flag)) != 0)
76 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_usec-t2.tv_usec)/1000)
77
78 #define VT102ID "\033[?6c"
79
80 enum glyph_attribute {
81 ATTR_NULL = 0,
82 ATTR_REVERSE = 1,
83 ATTR_UNDERLINE = 2,
84 ATTR_BOLD = 4,
85 ATTR_GFX = 8,
86 ATTR_ITALIC = 16,
87 ATTR_BLINK = 32,
88 };
89
90 enum cursor_movement {
91 CURSOR_SAVE,
92 CURSOR_LOAD
93 };
94
95 enum cursor_state {
96 CURSOR_DEFAULT = 0,
97 CURSOR_WRAPNEXT = 1,
98 CURSOR_ORIGIN = 2
99 };
100
101 enum term_mode {
102 MODE_WRAP = 1,
103 MODE_INSERT = 2,
104 MODE_APPKEYPAD = 4,
105 MODE_ALTSCREEN = 8,
106 MODE_CRLF = 16,
107 MODE_MOUSEBTN = 32,
108 MODE_MOUSEMOTION = 64,
109 MODE_MOUSE = 32|64,
110 MODE_REVERSE = 128,
111 MODE_KBDLOCK = 256,
112 MODE_HIDE = 512,
113 MODE_ECHO = 1024,
114 MODE_APPCURSOR = 2048,
115 MODE_MOUSESGR = 4096,
116 };
117
118 enum escape_state {
119 ESC_START = 1,
120 ESC_CSI = 2,
121 ESC_STR = 4, /* DSC, OSC, PM, APC */
122 ESC_ALTCHARSET = 8,
123 ESC_STR_END = 16, /* a final string was encountered */
124 ESC_TEST = 32, /* Enter in test mode */
125 };
126
127 enum window_state {
128 WIN_VISIBLE = 1,
129 WIN_REDRAW = 2,
130 WIN_FOCUSED = 4
131 };
132
133 enum selection_type {
134 SEL_REGULAR = 1,
135 SEL_RECTANGULAR = 2
136 };
137
138 /* bit macro */
139 #undef B0
140 enum { B0=1, B1=2, B2=4, B3=8, B4=16, B5=32, B6=64, B7=128 };
141
142 typedef unsigned char uchar;
143 typedef unsigned int uint;
144 typedef unsigned long ulong;
145 typedef unsigned short ushort;
146
147 typedef struct {
148 char c[UTF_SIZ]; /* character code */
149 uchar mode; /* attribute flags */
150 ushort fg; /* foreground */
151 ushort bg; /* background */
152 } Glyph;
153
154 typedef Glyph *Line;
155
156 typedef struct {
157 Glyph attr; /* current char attributes */
158 int x;
159 int y;
160 char state;
161 } TCursor;
162
163 /* CSI Escape sequence structs */
164 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
165 typedef struct {
166 char buf[ESC_BUF_SIZ]; /* raw string */
167 int len; /* raw string length */
168 char priv;
169 int arg[ESC_ARG_SIZ];
170 int narg; /* nb of args */
171 char mode;
172 } CSIEscape;
173
174 /* STR Escape sequence structs */
175 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
176 typedef struct {
177 char type; /* ESC type ... */
178 char buf[STR_BUF_SIZ]; /* raw string */
179 int len; /* raw string length */
180 char *args[STR_ARG_SIZ];
181 int narg; /* nb of args */
182 } STREscape;
183
184 /* Internal representation of the screen */
185 typedef struct {
186 int row; /* nb row */
187 int col; /* nb col */
188 Line *line; /* screen */
189 Line *alt; /* alternate screen */
190 bool *dirty; /* dirtyness of lines */
191 TCursor c; /* cursor */
192 int top; /* top scroll limit */
193 int bot; /* bottom scroll limit */
194 int mode; /* terminal mode flags */
195 int esc; /* escape state flags */
196 bool numlock; /* lock numbers in keyboard */
197 bool *tabs;
198 } Term;
199
200 /* Purely graphic info */
201 typedef struct {
202 Display *dpy;
203 Colourmap cmap;
204 Window win;
205 Drawable buf;
206 Atom xembed, wmdeletewin;
207 XIM xim;
208 XIC xic;
209 Draw draw;
210 Visual *vis;
211 int scr;
212 bool isfixed; /* is fixed geometry? */
213 int fx, fy, fw, fh; /* fixed geometry */
214 int tw, th; /* tty width and height */
215 int w, h; /* window width and height */
216 int ch; /* char height */
217 int cw; /* char width */
218 char state; /* focus, redraw, visible */
219 } XWindow;
220
221 typedef struct {
222 KeySym k;
223 uint mask;
224 char s[ESC_BUF_SIZ];
225 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
226 signed char appkey; /* application keypad */
227 signed char appcursor; /* application cursor */
228 signed char crlf; /* crlf mode */
229 } Key;
230
231 /* TODO: use better name for vars... */
232 typedef struct {
233 int mode;
234 int type;
235 int bx, by;
236 int ex, ey;
237 struct {
238 int x, y;
239 } b, e;
240 char *clip;
241 Atom xtarget;
242 bool alt;
243 struct timeval tclick1;
244 struct timeval tclick2;
245 } Selection;
246
247 typedef union {
248 int i;
249 unsigned int ui;
250 float f;
251 const void *v;
252 } Arg;
253
254 typedef struct {
255 unsigned int mod;
256 KeySym keysym;
257 void (*func)(const Arg *);
258 const Arg arg;
259 } Shortcut;
260
261 /* function definitions used in config.h */
262 static void clippaste(const Arg *);
263 static void numlock(const Arg *);
264 static void selpaste(const Arg *);
265 static void xzoom(const Arg *);
266
267 /* Config.h for applying patches and the configuration. */
268 #include "config.h"
269
270 /* Font structure */
271 typedef struct {
272 int height;
273 int width;
274 int ascent;
275 int descent;
276 short lbearing;
277 short rbearing;
278 XftFont *match;
279 FcFontSet *set;
280 FcPattern *pattern;
281 } Font;
282
283 /* Drawing Context */
284 typedef struct {
285 Colour col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
286 Font font, bfont, ifont, ibfont;
287 GC gc;
288 } DC;
289
290 static void die(const char *, ...);
291 static void draw(void);
292 static void redraw(int);
293 static void drawregion(int, int, int, int);
294 static void execsh(void);
295 static void sigchld(int);
296 static void run(void);
297
298 static void csidump(void);
299 static void csihandle(void);
300 static void csiparse(void);
301 static void csireset(void);
302 static void strdump(void);
303 static void strhandle(void);
304 static void strparse(void);
305 static void strreset(void);
306
307 static void tclearregion(int, int, int, int);
308 static void tcursor(int);
309 static void tdeletechar(int);
310 static void tdeleteline(int);
311 static void tinsertblank(int);
312 static void tinsertblankline(int);
313 static void tmoveto(int, int);
314 static void tmoveato(int x, int y);
315 static void tnew(int, int);
316 static void tnewline(int);
317 static void tputtab(bool);
318 static void tputc(char *, int);
319 static void treset(void);
320 static int tresize(int, int);
321 static void tscrollup(int, int);
322 static void tscrolldown(int, int);
323 static void tsetattr(int*, int);
324 static void tsetchar(char *, Glyph *, int, int);
325 static void tsetscroll(int, int);
326 static void tswapscreen(void);
327 static void tsetdirt(int, int);
328 static void tsetmode(bool, bool, int *, int);
329 static void tfulldirt(void);
330 static void techo(char *, int);
331
332 static inline bool match(uint, uint);
333 static void ttynew(void);
334 static void ttyread(void);
335 static void ttyresize(void);
336 static void ttywrite(const char *, size_t);
337
338 static void xdraws(char *, Glyph, int, int, int, int);
339 static void xhints(void);
340 static void xclear(int, int, int, int);
341 static void xdrawcursor(void);
342 static void xinit(void);
343 static void xloadcols(void);
344 static int xsetcolorname(int, const char *);
345 static int xloadfont(Font *, FcPattern *);
346 static void xloadfonts(char *, int);
347 static void xsettitle(char *);
348 static void xresettitle(void);
349 static void xseturgency(int);
350 static void xsetsel(char*);
351 static void xtermclear(int, int, int, int);
352 static void xunloadfonts(void);
353 static void xresize(int, int);
354
355 static void expose(XEvent *);
356 static void visibility(XEvent *);
357 static void unmap(XEvent *);
358 static char *kmap(KeySym, uint);
359 static void kpress(XEvent *);
360 static void cmessage(XEvent *);
361 static void cresize(int, int);
362 static void resize(XEvent *);
363 static void focus(XEvent *);
364 static void brelease(XEvent *);
365 static void bpress(XEvent *);
366 static void bmotion(XEvent *);
367 static void selnotify(XEvent *);
368 static void selclear(XEvent *);
369 static void selrequest(XEvent *);
370
371 static void selinit(void);
372 static inline bool selected(int, int);
373 static void selcopy(void);
374 static void selscroll(int, int);
375
376 static int utf8decode(char *, long *);
377 static int utf8encode(long *, char *);
378 static int utf8size(char *);
379 static int isfullutf8(char *, int);
380
381 static ssize_t xwrite(int, char *, size_t);
382 static void *xmalloc(size_t);
383 static void *xrealloc(void *, size_t);
384 static void *xcalloc(size_t, size_t);
385
386 static void (*handler[LASTEvent])(XEvent *) = {
387 [KeyPress] = kpress,
388 [ClientMessage] = cmessage,
389 [ConfigureNotify] = resize,
390 [VisibilityNotify] = visibility,
391 [UnmapNotify] = unmap,
392 [Expose] = expose,
393 [FocusIn] = focus,
394 [FocusOut] = focus,
395 [MotionNotify] = bmotion,
396 [ButtonPress] = bpress,
397 [ButtonRelease] = brelease,
398 [SelectionClear] = selclear,
399 [SelectionNotify] = selnotify,
400 [SelectionRequest] = selrequest,
401 };
402
403 /* Globals */
404 static DC dc;
405 static XWindow xw;
406 static Term term;
407 static CSIEscape csiescseq;
408 static STREscape strescseq;
409 static int cmdfd;
410 static pid_t pid;
411 static Selection sel;
412 static int iofd = -1;
413 static char **opt_cmd = NULL;
414 static char *opt_io = NULL;
415 static char *opt_title = NULL;
416 static char *opt_embed = NULL;
417 static char *opt_class = NULL;
418 static char *opt_font = NULL;
419
420 static char *usedfont = NULL;
421 static int usedfontsize = 0;
422
423 /* Font Ring Cache */
424 enum {
425 FRC_NORMAL,
426 FRC_ITALIC,
427 FRC_BOLD,
428 FRC_ITALICBOLD
429 };
430
431 typedef struct {
432 XftFont *font;
433 long c;
434 int flags;
435 } Fontcache;
436
437 /*
438 * Fontcache is a ring buffer, with frccur as current position and frclen as
439 * the current length of used elements.
440 */
441
442 static Fontcache frc[1024];
443 static int frccur = -1, frclen = 0;
444
445 ssize_t
446 xwrite(int fd, char *s, size_t len) {
447 size_t aux = len;
448
449 while(len > 0) {
450 ssize_t r = write(fd, s, len);
451 if(r < 0)
452 return r;
453 len -= r;
454 s += r;
455 }
456 return aux;
457 }
458
459 void *
460 xmalloc(size_t len) {
461 void *p = malloc(len);
462
463 if(!p)
464 die("Out of memory\n");
465
466 return p;
467 }
468
469 void *
470 xrealloc(void *p, size_t len) {
471 if((p = realloc(p, len)) == NULL)
472 die("Out of memory\n");
473
474 return p;
475 }
476
477 void *
478 xcalloc(size_t nmemb, size_t size) {
479 void *p = calloc(nmemb, size);
480
481 if(!p)
482 die("Out of memory\n");
483
484 return p;
485 }
486
487 int
488 utf8decode(char *s, long *u) {
489 uchar c;
490 int i, n, rtn;
491
492 rtn = 1;
493 c = *s;
494 if(~c & B7) { /* 0xxxxxxx */
495 *u = c;
496 return rtn;
497 } else if((c & (B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */
498 *u = c&(B4|B3|B2|B1|B0);
499 n = 1;
500 } else if((c & (B7|B6|B5|B4)) == (B7|B6|B5)) { /* 1110xxxx */
501 *u = c&(B3|B2|B1|B0);
502 n = 2;
503 } else if((c & (B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) { /* 11110xxx */
504 *u = c & (B2|B1|B0);
505 n = 3;
506 } else {
507 goto invalid;
508 }
509
510 for(i = n, ++s; i > 0; --i, ++rtn, ++s) {
511 c = *s;
512 if((c & (B7|B6)) != B7) /* 10xxxxxx */
513 goto invalid;
514 *u <<= 6;
515 *u |= c & (B5|B4|B3|B2|B1|B0);
516 }
517
518 if((n == 1 && *u < 0x80) ||
519 (n == 2 && *u < 0x800) ||
520 (n == 3 && *u < 0x10000) ||
521 (*u >= 0xD800 && *u <= 0xDFFF)) {
522 goto invalid;
523 }
524
525 return rtn;
526 invalid:
527 *u = 0xFFFD;
528
529 return rtn;
530 }
531
532 int
533 utf8encode(long *u, char *s) {
534 uchar *sp;
535 ulong uc;
536 int i, n;
537
538 sp = (uchar *)s;
539 uc = *u;
540 if(uc < 0x80) {
541 *sp = uc; /* 0xxxxxxx */
542 return 1;
543 } else if(*u < 0x800) {
544 *sp = (uc >> 6) | (B7|B6); /* 110xxxxx */
545 n = 1;
546 } else if(uc < 0x10000) {
547 *sp = (uc >> 12) | (B7|B6|B5); /* 1110xxxx */
548 n = 2;
549 } else if(uc <= 0x10FFFF) {
550 *sp = (uc >> 18) | (B7|B6|B5|B4); /* 11110xxx */
551 n = 3;
552 } else {
553 goto invalid;
554 }
555
556 for(i=n,++sp; i>0; --i,++sp)
557 *sp = ((uc >> 6*(i-1)) & (B5|B4|B3|B2|B1|B0)) | B7; /* 10xxxxxx */
558
559 return n+1;
560 invalid:
561 /* U+FFFD */
562 *s++ = '\xEF';
563 *s++ = '\xBF';
564 *s = '\xBD';
565
566 return 3;
567 }
568
569 /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
570 UTF-8 otherwise return 0 */
571 int
572 isfullutf8(char *s, int b) {
573 uchar *c1, *c2, *c3;
574
575 c1 = (uchar *)s;
576 c2 = (uchar *)++s;
577 c3 = (uchar *)++s;
578 if(b < 1) {
579 return 0;
580 } else if((*c1&(B7|B6|B5)) == (B7|B6) && b == 1) {
581 return 0;
582 } else if((*c1&(B7|B6|B5|B4)) == (B7|B6|B5) &&
583 ((b == 1) ||
584 ((b == 2) && (*c2&(B7|B6)) == B7))) {
585 return 0;
586 } else if((*c1&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4) &&
587 ((b == 1) ||
588 ((b == 2) && (*c2&(B7|B6)) == B7) ||
589 ((b == 3) && (*c2&(B7|B6)) == B7 && (*c3&(B7|B6)) == B7))) {
590 return 0;
591 } else {
592 return 1;
593 }
594 }
595
596 int
597 utf8size(char *s) {
598 uchar c = *s;
599
600 if(~c&B7) {
601 return 1;
602 } else if((c&(B7|B6|B5)) == (B7|B6)) {
603 return 2;
604 } else if((c&(B7|B6|B5|B4)) == (B7|B6|B5)) {
605 return 3;
606 } else {
607 return 4;
608 }
609 }
610
611 void
612 selinit(void) {
613 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
614 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
615 sel.mode = 0;
616 sel.bx = -1;
617 sel.clip = NULL;
618 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
619 if(sel.xtarget == None)
620 sel.xtarget = XA_STRING;
621 }
622
623 static int
624 x2col(int x) {
625 x -= borderpx;
626 x /= xw.cw;
627
628 return LIMIT(x, 0, term.col-1);
629 }
630
631 static int
632 y2row(int y) {
633 y -= borderpx;
634 y /= xw.ch;
635
636 return LIMIT(y, 0, term.row-1);
637 }
638
639 static inline bool
640 selected(int x, int y) {
641 int bx, ex;
642
643 if(sel.ey == y && sel.by == y) {
644 bx = MIN(sel.bx, sel.ex);
645 ex = MAX(sel.bx, sel.ex);
646
647 return BETWEEN(x, bx, ex);
648 }
649
650 if(sel.type == SEL_RECTANGULAR) {
651 return ((sel.b.y <= y && y <= sel.e.y)
652 && (sel.b.x <= x && x <= sel.e.x));
653 }
654 return ((sel.b.y < y && y < sel.e.y)
655 || (y == sel.e.y && x <= sel.e.x))
656 || (y == sel.b.y && x >= sel.b.x
657 && (x <= sel.e.x || sel.b.y != sel.e.y));
658 }
659
660 void
661 getbuttoninfo(XEvent *e) {
662 int type;
663 uint state = e->xbutton.state &~Button1Mask;
664
665 sel.alt = IS_SET(MODE_ALTSCREEN);
666
667 sel.ex = x2col(e->xbutton.x);
668 sel.ey = y2row(e->xbutton.y);
669
670 sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
671 sel.b.y = MIN(sel.by, sel.ey);
672 sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
673 sel.e.y = MAX(sel.by, sel.ey);
674
675 sel.type = SEL_REGULAR;
676 for(type = 1; type < LEN(selmasks); ++type) {
677 if(match(selmasks[type], state)) {
678 sel.type = type;
679 break;
680 }
681 }
682 }
683
684 void
685 mousereport(XEvent *e) {
686 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
687 button = e->xbutton.button, state = e->xbutton.state,
688 len;
689 char buf[40];
690 static int ob, ox, oy;
691
692 /* from urxvt */
693 if(e->xbutton.type == MotionNotify) {
694 if(!IS_SET(MODE_MOUSEMOTION) || (x == ox && y == oy))
695 return;
696 button = ob + 32;
697 ox = x, oy = y;
698 } else if(!IS_SET(MODE_MOUSESGR)
699 && (e->xbutton.type == ButtonRelease
700 || button == AnyButton)) {
701 button = 3;
702 } else {
703 button -= Button1;
704 if(button >= 3)
705 button += 64 - 3;
706 if(e->xbutton.type == ButtonPress) {
707 ob = button;
708 ox = x, oy = y;
709 }
710 }
711
712 button += (state & ShiftMask ? 4 : 0)
713 + (state & Mod4Mask ? 8 : 0)
714 + (state & ControlMask ? 16 : 0);
715
716 len = 0;
717 if(IS_SET(MODE_MOUSESGR)) {
718 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
719 button, x+1, y+1,
720 e->xbutton.type == ButtonRelease ? 'm' : 'M');
721 } else if(x < 223 && y < 223) {
722 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
723 32+button, 32+x+1, 32+y+1);
724 } else {
725 return;
726 }
727
728 ttywrite(buf, len);
729 }
730
731 void
732 bpress(XEvent *e) {
733 if(IS_SET(MODE_MOUSE)) {
734 mousereport(e);
735 } else if(e->xbutton.button == Button1) {
736 if(sel.bx != -1) {
737 sel.bx = -1;
738 tsetdirt(sel.b.y, sel.e.y);
739 draw();
740 }
741 sel.mode = 1;
742 sel.type = SEL_REGULAR;
743 sel.ex = sel.bx = x2col(e->xbutton.x);
744 sel.ey = sel.by = y2row(e->xbutton.y);
745 } else if(e->xbutton.button == Button4) {
746 ttywrite("\031", 1);
747 } else if(e->xbutton.button == Button5) {
748 ttywrite("\005", 1);
749 }
750 }
751
752 void
753 selcopy(void) {
754 char *str, *ptr;
755 int x, y, bufsize, isselected = 0, size;
756 Glyph *gp, *last;
757
758 if(sel.bx == -1) {
759 str = NULL;
760 } else {
761 bufsize = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
762 ptr = str = xmalloc(bufsize);
763
764 /* append every set & selected glyph to the selection */
765 for(y = sel.b.y; y < sel.e.y + 1; y++) {
766 isselected = 0;
767 gp = &term.line[y][0];
768 last = gp + term.col;
769
770 while(--last >= gp && !(selected(last - gp, y) && \
771 strcmp(last->c, " ") != 0))
772 /* nothing */;
773
774 for(x = 0; gp <= last; x++, ++gp) {
775 if(!selected(x, y)) {
776 continue;
777 } else {
778 isselected = 1;
779 }
780
781 size = utf8size(gp->c);
782 memcpy(ptr, gp->c, size);
783 ptr += size;
784 }
785
786 /*
787 * Copy and pasting of line endings is inconsistent
788 * in the inconsistent terminal and GUI world.
789 * The best solution seems like to produce '\n' when
790 * something is copied from st and convert '\n' to
791 * '\r', when something to be pasted is received by
792 * st.
793 * FIXME: Fix the computer world.
794 */
795 if(isselected && y < sel.e.y)
796 *ptr++ = '\n';
797 }
798 *ptr = 0;
799 }
800 xsetsel(str);
801 }
802
803 void
804 selnotify(XEvent *e) {
805 ulong nitems, ofs, rem;
806 int format;
807 uchar *data, *last, *repl;
808 Atom type;
809
810 ofs = 0;
811 do {
812 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
813 False, AnyPropertyType, &type, &format,
814 &nitems, &rem, &data)) {
815 fprintf(stderr, "Clipboard allocation failed\n");
816 return;
817 }
818
819 /*
820 * As seen in selcopy:
821 * Line endings are inconsistent in the terminal and GUI world
822 * copy and pasting. When receiving some selection data,
823 * replace all '\n' with '\r'.
824 * FIXME: Fix the computer world.
825 */
826 repl = data;
827 last = data + nitems * format / 8;
828 while((repl = memchr(repl, '\n', last - repl))) {
829 *repl++ = '\r';
830 }
831
832 ttywrite((const char *)data, nitems * format / 8);
833 XFree(data);
834 /* number of 32-bit chunks returned */
835 ofs += nitems * format / 32;
836 } while(rem > 0);
837 }
838
839 void
840 selpaste(const Arg *dummy) {
841 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
842 xw.win, CurrentTime);
843 }
844
845 void
846 clippaste(const Arg *dummy) {
847 Atom clipboard;
848
849 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
850 XConvertSelection(xw.dpy, clipboard, sel.xtarget, XA_PRIMARY,
851 xw.win, CurrentTime);
852 }
853
854 void
855 selclear(XEvent *e) {
856 if(sel.bx == -1)
857 return;
858 sel.bx = -1;
859 tsetdirt(sel.b.y, sel.e.y);
860 }
861
862 void
863 selrequest(XEvent *e) {
864 XSelectionRequestEvent *xsre;
865 XSelectionEvent xev;
866 Atom xa_targets, string;
867
868 xsre = (XSelectionRequestEvent *) e;
869 xev.type = SelectionNotify;
870 xev.requestor = xsre->requestor;
871 xev.selection = xsre->selection;
872 xev.target = xsre->target;
873 xev.time = xsre->time;
874 /* reject */
875 xev.property = None;
876
877 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
878 if(xsre->target == xa_targets) {
879 /* respond with the supported type */
880 string = sel.xtarget;
881 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
882 XA_ATOM, 32, PropModeReplace,
883 (uchar *) &string, 1);
884 xev.property = xsre->property;
885 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
886 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
887 xsre->target, 8, PropModeReplace,
888 (uchar *) sel.clip, strlen(sel.clip));
889 xev.property = xsre->property;
890 }
891
892 /* all done, send a notification to the listener */
893 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
894 fprintf(stderr, "Error sending SelectionNotify event\n");
895 }
896
897 void
898 xsetsel(char *str) {
899 /* register the selection for both the clipboard and the primary */
900 Atom clipboard;
901
902 free(sel.clip);
903 sel.clip = str;
904
905 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
906
907 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
908 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
909 }
910
911 void
912 brelease(XEvent *e) {
913 struct timeval now;
914
915 if(IS_SET(MODE_MOUSE)) {
916 mousereport(e);
917 return;
918 }
919
920 if(e->xbutton.button == Button2) {
921 selpaste(NULL);
922 } else if(e->xbutton.button == Button1) {
923 sel.mode = 0;
924 getbuttoninfo(e);
925 term.dirty[sel.ey] = 1;
926 if(sel.bx == sel.ex && sel.by == sel.ey) {
927 sel.bx = -1;
928 gettimeofday(&now, NULL);
929
930 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
931 /* triple click on the line */
932 sel.b.x = sel.bx = 0;
933 sel.e.x = sel.ex = term.col;
934 sel.b.y = sel.e.y = sel.ey;
935 selcopy();
936 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
937 /* double click to select word */
938 sel.bx = sel.ex;
939 while(sel.bx > 0 && term.line[sel.ey][sel.bx-1].c[0] != ' ') {
940 sel.bx--;
941 }
942 sel.b.x = sel.bx;
943 while(sel.ex < term.col-1 && term.line[sel.ey][sel.ex+1].c[0] != ' ') {
944 sel.ex++;
945 }
946 sel.e.x = sel.ex;
947 sel.b.y = sel.e.y = sel.ey;
948 selcopy();
949 }
950 } else {
951 selcopy();
952 }
953 }
954
955 memcpy(&sel.tclick2, &sel.tclick1, sizeof(struct timeval));
956 gettimeofday(&sel.tclick1, NULL);
957 }
958
959 void
960 bmotion(XEvent *e) {
961 int oldey, oldex, oldsby, oldsey;
962
963 if(IS_SET(MODE_MOUSE)) {
964 mousereport(e);
965 return;
966 }
967
968 if(!sel.mode)
969 return;
970
971 oldey = sel.ey;
972 oldex = sel.ex;
973 oldsby = sel.b.y;
974 oldsey = sel.e.y;
975 getbuttoninfo(e);
976
977 if(oldey != sel.ey || oldex != sel.ex) {
978 tsetdirt(MIN(sel.b.y, oldsby), MAX(sel.e.y, oldsey));
979 }
980 }
981
982 void
983 die(const char *errstr, ...) {
984 va_list ap;
985
986 va_start(ap, errstr);
987 vfprintf(stderr, errstr, ap);
988 va_end(ap);
989 exit(EXIT_FAILURE);
990 }
991
992 void
993 execsh(void) {
994 char **args;
995 char *envshell = getenv("SHELL");
996 const struct passwd *pass = getpwuid(getuid());
997 char buf[sizeof(long) * 8 + 1];
998
999 unsetenv("COLUMNS");
1000 unsetenv("LINES");
1001 unsetenv("TERMCAP");
1002
1003 if(pass) {
1004 setenv("LOGNAME", pass->pw_name, 1);
1005 setenv("USER", pass->pw_name, 1);
1006 setenv("SHELL", pass->pw_shell, 0);
1007 setenv("HOME", pass->pw_dir, 0);
1008 }
1009
1010 snprintf(buf, sizeof(buf), "%lu", xw.win);
1011 setenv("WINDOWID", buf, 1);
1012
1013 signal(SIGCHLD, SIG_DFL);
1014 signal(SIGHUP, SIG_DFL);
1015 signal(SIGINT, SIG_DFL);
1016 signal(SIGQUIT, SIG_DFL);
1017 signal(SIGTERM, SIG_DFL);
1018 signal(SIGALRM, SIG_DFL);
1019
1020 DEFAULT(envshell, shell);
1021 setenv("TERM", termname, 1);
1022 args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
1023 execvp(args[0], args);
1024 exit(EXIT_FAILURE);
1025 }
1026
1027 void
1028 sigchld(int a) {
1029 int stat = 0;
1030
1031 if(waitpid(pid, &stat, 0) < 0)
1032 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
1033
1034 if(WIFEXITED(stat)) {
1035 exit(WEXITSTATUS(stat));
1036 } else {
1037 exit(EXIT_FAILURE);
1038 }
1039 }
1040
1041 void
1042 ttynew(void) {
1043 int m, s;
1044 struct winsize w = {term.row, term.col, 0, 0};
1045
1046 /* seems to work fine on linux, openbsd and freebsd */
1047 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1048 die("openpty failed: %s\n", SERRNO);
1049
1050 switch(pid = fork()) {
1051 case -1:
1052 die("fork failed\n");
1053 break;
1054 case 0:
1055 setsid(); /* create a new process group */
1056 dup2(s, STDIN_FILENO);
1057 dup2(s, STDOUT_FILENO);
1058 dup2(s, STDERR_FILENO);
1059 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1060 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
1061 close(s);
1062 close(m);
1063 execsh();
1064 break;
1065 default:
1066 close(s);
1067 cmdfd = m;
1068 signal(SIGCHLD, sigchld);
1069 if(opt_io) {
1070 iofd = (!strcmp(opt_io, "-")) ?
1071 STDOUT_FILENO :
1072 open(opt_io, O_WRONLY | O_CREAT, 0666);
1073 if(iofd < 0) {
1074 fprintf(stderr, "Error opening %s:%s\n",
1075 opt_io, strerror(errno));
1076 }
1077 }
1078 }
1079 }
1080
1081 void
1082 dump(char c) {
1083 static int col;
1084
1085 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
1086 if(++col % 10 == 0)
1087 fprintf(stderr, "\n");
1088 }
1089
1090 void
1091 ttyread(void) {
1092 static char buf[BUFSIZ];
1093 static int buflen = 0;
1094 char *ptr;
1095 char s[UTF_SIZ];
1096 int charsize; /* size of utf8 char in bytes */
1097 long utf8c;
1098 int ret;
1099
1100 /* append read bytes to unprocessed bytes */
1101 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1102 die("Couldn't read from shell: %s\n", SERRNO);
1103
1104 /* process every complete utf8 char */
1105 buflen += ret;
1106 ptr = buf;
1107 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
1108 charsize = utf8decode(ptr, &utf8c);
1109 utf8encode(&utf8c, s);
1110 tputc(s, charsize);
1111 ptr += charsize;
1112 buflen -= charsize;
1113 }
1114
1115 /* keep any uncomplete utf8 char for the next call */
1116 memmove(buf, ptr, buflen);
1117 }
1118
1119 void
1120 ttywrite(const char *s, size_t n) {
1121 if(write(cmdfd, s, n) == -1)
1122 die("write error on tty: %s\n", SERRNO);
1123 }
1124
1125 void
1126 ttyresize(void) {
1127 struct winsize w;
1128
1129 w.ws_row = term.row;
1130 w.ws_col = term.col;
1131 w.ws_xpixel = xw.tw;
1132 w.ws_ypixel = xw.th;
1133 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1134 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
1135 }
1136
1137 void
1138 tsetdirt(int top, int bot) {
1139 int i;
1140
1141 LIMIT(top, 0, term.row-1);
1142 LIMIT(bot, 0, term.row-1);
1143
1144 for(i = top; i <= bot; i++)
1145 term.dirty[i] = 1;
1146 }
1147
1148 void
1149 tfulldirt(void) {
1150 tsetdirt(0, term.row-1);
1151 }
1152
1153 void
1154 tcursor(int mode) {
1155 static TCursor c;
1156
1157 if(mode == CURSOR_SAVE) {
1158 c = term.c;
1159 } else if(mode == CURSOR_LOAD) {
1160 term.c = c;
1161 tmoveto(c.x, c.y);
1162 }
1163 }
1164
1165 void
1166 treset(void) {
1167 uint i;
1168
1169 term.c = (TCursor){{
1170 .mode = ATTR_NULL,
1171 .fg = defaultfg,
1172 .bg = defaultbg
1173 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1174
1175 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1176 for(i = tabspaces; i < term.col; i += tabspaces)
1177 term.tabs[i] = 1;
1178 term.top = 0;
1179 term.bot = term.row - 1;
1180 term.mode = MODE_WRAP;
1181
1182 tclearregion(0, 0, term.col-1, term.row-1);
1183 tmoveto(0, 0);
1184 tcursor(CURSOR_SAVE);
1185 }
1186
1187 void
1188 tnew(int col, int row) {
1189 memset(&term, 0, sizeof(Term));
1190 tresize(col, row);
1191 term.numlock = 1;
1192
1193 treset();
1194 }
1195
1196 void
1197 tswapscreen(void) {
1198 Line *tmp = term.line;
1199
1200 term.line = term.alt;
1201 term.alt = tmp;
1202 term.mode ^= MODE_ALTSCREEN;
1203 tfulldirt();
1204 }
1205
1206 void
1207 tscrolldown(int orig, int n) {
1208 int i;
1209 Line temp;
1210
1211 LIMIT(n, 0, term.bot-orig+1);
1212
1213 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1214
1215 for(i = term.bot; i >= orig+n; i--) {
1216 temp = term.line[i];
1217 term.line[i] = term.line[i-n];
1218 term.line[i-n] = temp;
1219
1220 term.dirty[i] = 1;
1221 term.dirty[i-n] = 1;
1222 }
1223
1224 selscroll(orig, n);
1225 }
1226
1227 void
1228 tscrollup(int orig, int n) {
1229 int i;
1230 Line temp;
1231 LIMIT(n, 0, term.bot-orig+1);
1232
1233 tclearregion(0, orig, term.col-1, orig+n-1);
1234
1235 for(i = orig; i <= term.bot-n; i++) {
1236 temp = term.line[i];
1237 term.line[i] = term.line[i+n];
1238 term.line[i+n] = temp;
1239
1240 term.dirty[i] = 1;
1241 term.dirty[i+n] = 1;
1242 }
1243
1244 selscroll(orig, -n);
1245 }
1246
1247 void
1248 selscroll(int orig, int n) {
1249 if(sel.bx == -1)
1250 return;
1251
1252 if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
1253 if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
1254 sel.bx = -1;
1255 return;
1256 }
1257 if(sel.type == SEL_RECTANGULAR) {
1258 if(sel.by < term.top)
1259 sel.by = term.top;
1260 if(sel.ey > term.bot)
1261 sel.ey = term.bot;
1262 } else {
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 }
1272 sel.b.y = sel.by, sel.b.x = sel.bx;
1273 sel.e.y = sel.ey, sel.e.x = sel.ex;
1274 }
1275 }
1276
1277 void
1278 tnewline(int first_col) {
1279 int y = term.c.y;
1280
1281 if(y == term.bot) {
1282 tscrollup(term.top, 1);
1283 } else {
1284 y++;
1285 }
1286 tmoveto(first_col ? 0 : term.c.x, y);
1287 }
1288
1289 void
1290 csiparse(void) {
1291 char *p = csiescseq.buf, *np;
1292 long int v;
1293
1294 csiescseq.narg = 0;
1295 if(*p == '?') {
1296 csiescseq.priv = 1;
1297 p++;
1298 }
1299
1300 csiescseq.buf[csiescseq.len] = '\0';
1301 while(p < csiescseq.buf+csiescseq.len) {
1302 np = NULL;
1303 v = strtol(p, &np, 10);
1304 if(np == p)
1305 v = 0;
1306 if(v == LONG_MAX || v == LONG_MIN)
1307 v = -1;
1308 csiescseq.arg[csiescseq.narg++] = v;
1309 p = np;
1310 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1311 break;
1312 p++;
1313 }
1314 csiescseq.mode = *p;
1315 }
1316
1317 /* for absolute user moves, when decom is set */
1318 void
1319 tmoveato(int x, int y) {
1320 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1321 }
1322
1323 void
1324 tmoveto(int x, int y) {
1325 int miny, maxy;
1326
1327 if(term.c.state & CURSOR_ORIGIN) {
1328 miny = term.top;
1329 maxy = term.bot;
1330 } else {
1331 miny = 0;
1332 maxy = term.row - 1;
1333 }
1334 LIMIT(x, 0, term.col-1);
1335 LIMIT(y, miny, maxy);
1336 term.c.state &= ~CURSOR_WRAPNEXT;
1337 term.c.x = x;
1338 term.c.y = y;
1339 }
1340
1341 void
1342 tsetchar(char *c, Glyph *attr, int x, int y) {
1343 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1344 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1345 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1346 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1347 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1348 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1349 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1350 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1351 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1352 };
1353
1354 /*
1355 * The table is proudly stolen from rxvt.
1356 */
1357 if(attr->mode & ATTR_GFX) {
1358 if(c[0] >= 0x41 && c[0] <= 0x7e
1359 && vt100_0[c[0] - 0x41]) {
1360 c = vt100_0[c[0] - 0x41];
1361 }
1362 }
1363
1364 term.dirty[y] = 1;
1365 term.line[y][x] = *attr;
1366 memcpy(term.line[y][x].c, c, UTF_SIZ);
1367 }
1368
1369 void
1370 tclearregion(int x1, int y1, int x2, int y2) {
1371 int x, y, temp;
1372
1373 if(x1 > x2)
1374 temp = x1, x1 = x2, x2 = temp;
1375 if(y1 > y2)
1376 temp = y1, y1 = y2, y2 = temp;
1377
1378 LIMIT(x1, 0, term.col-1);
1379 LIMIT(x2, 0, term.col-1);
1380 LIMIT(y1, 0, term.row-1);
1381 LIMIT(y2, 0, term.row-1);
1382
1383 for(y = y1; y <= y2; y++) {
1384 term.dirty[y] = 1;
1385 for(x = x1; x <= x2; x++) {
1386 term.line[y][x] = term.c.attr;
1387 memcpy(term.line[y][x].c, " ", 2);
1388 }
1389 }
1390 }
1391
1392 void
1393 tdeletechar(int n) {
1394 int src = term.c.x + n;
1395 int dst = term.c.x;
1396 int size = term.col - src;
1397
1398 term.dirty[term.c.y] = 1;
1399
1400 if(src >= term.col) {
1401 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1402 return;
1403 }
1404
1405 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1406 size * sizeof(Glyph));
1407 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1408 }
1409
1410 void
1411 tinsertblank(int n) {
1412 int src = term.c.x;
1413 int dst = src + n;
1414 int size = term.col - dst;
1415
1416 term.dirty[term.c.y] = 1;
1417
1418 if(dst >= term.col) {
1419 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1420 return;
1421 }
1422
1423 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1424 size * sizeof(Glyph));
1425 tclearregion(src, term.c.y, dst - 1, term.c.y);
1426 }
1427
1428 void
1429 tinsertblankline(int n) {
1430 if(term.c.y < term.top || term.c.y > term.bot)
1431 return;
1432
1433 tscrolldown(term.c.y, n);
1434 }
1435
1436 void
1437 tdeleteline(int n) {
1438 if(term.c.y < term.top || term.c.y > term.bot)
1439 return;
1440
1441 tscrollup(term.c.y, n);
1442 }
1443
1444 void
1445 tsetattr(int *attr, int l) {
1446 int i;
1447
1448 for(i = 0; i < l; i++) {
1449 switch(attr[i]) {
1450 case 0:
1451 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE \
1452 | ATTR_BOLD | ATTR_ITALIC \
1453 | 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 if (!allowaltscreen)
1617 break;
1618
1619 alt = IS_SET(MODE_ALTSCREEN);
1620 if(alt) {
1621 tclearregion(0, 0, term.col-1,
1622 term.row-1);
1623 }
1624 if(set ^ alt) /* set is always 1 or 0 */
1625 tswapscreen();
1626 if(*args != 1049)
1627 break;
1628 /* FALLTRU */
1629 case 1048:
1630 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1631 break;
1632 default:
1633 fprintf(stderr,
1634 "erresc: unknown private set/reset mode %d\n",
1635 *args);
1636 break;
1637 }
1638 } else {
1639 switch(*args) {
1640 case 0: /* Error (IGNORED) */
1641 break;
1642 case 2: /* KAM -- keyboard action */
1643 MODBIT(term.mode, set, MODE_KBDLOCK);
1644 break;
1645 case 4: /* IRM -- Insertion-replacement */
1646 MODBIT(term.mode, set, MODE_INSERT);
1647 break;
1648 case 12: /* SRM -- Send/Receive */
1649 MODBIT(term.mode, !set, MODE_ECHO);
1650 break;
1651 case 20: /* LNM -- Linefeed/new line */
1652 MODBIT(term.mode, set, MODE_CRLF);
1653 break;
1654 default:
1655 fprintf(stderr,
1656 "erresc: unknown set/reset mode %d\n",
1657 *args);
1658 break;
1659 }
1660 }
1661 }
1662 }
1663 #undef MODBIT
1664
1665
1666 void
1667 csihandle(void) {
1668 switch(csiescseq.mode) {
1669 default:
1670 unknown:
1671 fprintf(stderr, "erresc: unknown csi ");
1672 csidump();
1673 /* die(""); */
1674 break;
1675 case '@': /* ICH -- Insert <n> blank char */
1676 DEFAULT(csiescseq.arg[0], 1);
1677 tinsertblank(csiescseq.arg[0]);
1678 break;
1679 case 'A': /* CUU -- Cursor <n> Up */
1680 DEFAULT(csiescseq.arg[0], 1);
1681 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1682 break;
1683 case 'B': /* CUD -- Cursor <n> Down */
1684 case 'e': /* VPR --Cursor <n> Down */
1685 DEFAULT(csiescseq.arg[0], 1);
1686 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1687 break;
1688 case 'c': /* DA -- Device Attributes */
1689 if(csiescseq.arg[0] == 0)
1690 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1691 break;
1692 case 'C': /* CUF -- Cursor <n> Forward */
1693 case 'a': /* HPR -- Cursor <n> Forward */
1694 DEFAULT(csiescseq.arg[0], 1);
1695 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1696 break;
1697 case 'D': /* CUB -- Cursor <n> Backward */
1698 DEFAULT(csiescseq.arg[0], 1);
1699 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1700 break;
1701 case 'E': /* CNL -- Cursor <n> Down and first col */
1702 DEFAULT(csiescseq.arg[0], 1);
1703 tmoveto(0, term.c.y+csiescseq.arg[0]);
1704 break;
1705 case 'F': /* CPL -- Cursor <n> Up and first col */
1706 DEFAULT(csiescseq.arg[0], 1);
1707 tmoveto(0, term.c.y-csiescseq.arg[0]);
1708 break;
1709 case 'g': /* TBC -- Tabulation clear */
1710 switch(csiescseq.arg[0]) {
1711 case 0: /* clear current tab stop */
1712 term.tabs[term.c.x] = 0;
1713 break;
1714 case 3: /* clear all the tabs */
1715 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1716 break;
1717 default:
1718 goto unknown;
1719 }
1720 break;
1721 case 'G': /* CHA -- Move to <col> */
1722 case '`': /* HPA */
1723 DEFAULT(csiescseq.arg[0], 1);
1724 tmoveto(csiescseq.arg[0]-1, term.c.y);
1725 break;
1726 case 'H': /* CUP -- Move to <row> <col> */
1727 case 'f': /* HVP */
1728 DEFAULT(csiescseq.arg[0], 1);
1729 DEFAULT(csiescseq.arg[1], 1);
1730 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1731 break;
1732 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1733 DEFAULT(csiescseq.arg[0], 1);
1734 while(csiescseq.arg[0]--)
1735 tputtab(1);
1736 break;
1737 case 'J': /* ED -- Clear screen */
1738 sel.bx = -1;
1739 switch(csiescseq.arg[0]) {
1740 case 0: /* below */
1741 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1742 if(term.c.y < term.row-1) {
1743 tclearregion(0, term.c.y+1, term.col-1,
1744 term.row-1);
1745 }
1746 break;
1747 case 1: /* above */
1748 if(term.c.y > 1)
1749 tclearregion(0, 0, term.col-1, term.c.y-1);
1750 tclearregion(0, term.c.y, term.c.x, term.c.y);
1751 break;
1752 case 2: /* all */
1753 tclearregion(0, 0, term.col-1, term.row-1);
1754 break;
1755 default:
1756 goto unknown;
1757 }
1758 break;
1759 case 'K': /* EL -- Clear line */
1760 switch(csiescseq.arg[0]) {
1761 case 0: /* right */
1762 tclearregion(term.c.x, term.c.y, term.col-1,
1763 term.c.y);
1764 break;
1765 case 1: /* left */
1766 tclearregion(0, term.c.y, term.c.x, term.c.y);
1767 break;
1768 case 2: /* all */
1769 tclearregion(0, term.c.y, term.col-1, term.c.y);
1770 break;
1771 }
1772 break;
1773 case 'S': /* SU -- Scroll <n> line up */
1774 DEFAULT(csiescseq.arg[0], 1);
1775 tscrollup(term.top, csiescseq.arg[0]);
1776 break;
1777 case 'T': /* SD -- Scroll <n> line down */
1778 DEFAULT(csiescseq.arg[0], 1);
1779 tscrolldown(term.top, csiescseq.arg[0]);
1780 break;
1781 case 'L': /* IL -- Insert <n> blank lines */
1782 DEFAULT(csiescseq.arg[0], 1);
1783 tinsertblankline(csiescseq.arg[0]);
1784 break;
1785 case 'l': /* RM -- Reset Mode */
1786 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
1787 break;
1788 case 'M': /* DL -- Delete <n> lines */
1789 DEFAULT(csiescseq.arg[0], 1);
1790 tdeleteline(csiescseq.arg[0]);
1791 break;
1792 case 'X': /* ECH -- Erase <n> char */
1793 DEFAULT(csiescseq.arg[0], 1);
1794 tclearregion(term.c.x, term.c.y,
1795 term.c.x + csiescseq.arg[0] - 1, term.c.y);
1796 break;
1797 case 'P': /* DCH -- Delete <n> char */
1798 DEFAULT(csiescseq.arg[0], 1);
1799 tdeletechar(csiescseq.arg[0]);
1800 break;
1801 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
1802 DEFAULT(csiescseq.arg[0], 1);
1803 while(csiescseq.arg[0]--)
1804 tputtab(0);
1805 break;
1806 case 'd': /* VPA -- Move to <row> */
1807 DEFAULT(csiescseq.arg[0], 1);
1808 tmoveato(term.c.x, csiescseq.arg[0]-1);
1809 break;
1810 case 'h': /* SM -- Set terminal mode */
1811 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
1812 break;
1813 case 'm': /* SGR -- Terminal attribute (color) */
1814 tsetattr(csiescseq.arg, csiescseq.narg);
1815 break;
1816 case 'r': /* DECSTBM -- Set Scrolling Region */
1817 if(csiescseq.priv) {
1818 goto unknown;
1819 } else {
1820 DEFAULT(csiescseq.arg[0], 1);
1821 DEFAULT(csiescseq.arg[1], term.row);
1822 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
1823 tmoveato(0, 0);
1824 }
1825 break;
1826 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1827 tcursor(CURSOR_SAVE);
1828 break;
1829 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1830 tcursor(CURSOR_LOAD);
1831 break;
1832 }
1833 }
1834
1835 void
1836 csidump(void) {
1837 int i;
1838 uint c;
1839
1840 printf("ESC[");
1841 for(i = 0; i < csiescseq.len; i++) {
1842 c = csiescseq.buf[i] & 0xff;
1843 if(isprint(c)) {
1844 putchar(c);
1845 } else if(c == '\n') {
1846 printf("(\\n)");
1847 } else if(c == '\r') {
1848 printf("(\\r)");
1849 } else if(c == 0x1b) {
1850 printf("(\\e)");
1851 } else {
1852 printf("(%02x)", c);
1853 }
1854 }
1855 putchar('\n');
1856 }
1857
1858 void
1859 csireset(void) {
1860 memset(&csiescseq, 0, sizeof(csiescseq));
1861 }
1862
1863 void
1864 strhandle(void) {
1865 char *p = NULL;
1866 int i, j, narg;
1867
1868 strparse();
1869 narg = strescseq.narg;
1870
1871 switch(strescseq.type) {
1872 case ']': /* OSC -- Operating System Command */
1873 switch(i = atoi(strescseq.args[0])) {
1874 case 0:
1875 case 1:
1876 case 2:
1877 if(narg > 1)
1878 xsettitle(strescseq.args[1]);
1879 break;
1880 case 4: /* color set */
1881 if(narg < 3)
1882 break;
1883 p = strescseq.args[2];
1884 /* fall through */
1885 case 104: /* color reset, here p = NULL */
1886 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
1887 if (!xsetcolorname(j, p)) {
1888 fprintf(stderr, "erresc: invalid color %s\n", p);
1889 } else {
1890 /*
1891 * TODO if defaultbg color is changed, borders
1892 * are dirty
1893 */
1894 redraw(0);
1895 }
1896 break;
1897 default:
1898 fprintf(stderr, "erresc: unknown str ");
1899 strdump();
1900 break;
1901 }
1902 break;
1903 case 'k': /* old title set compatibility */
1904 xsettitle(strescseq.args[0]);
1905 break;
1906 case 'P': /* DSC -- Device Control String */
1907 case '_': /* APC -- Application Program Command */
1908 case '^': /* PM -- Privacy Message */
1909 default:
1910 fprintf(stderr, "erresc: unknown str ");
1911 strdump();
1912 /* die(""); */
1913 break;
1914 }
1915 }
1916
1917 void
1918 strparse(void) {
1919 char *p = strescseq.buf;
1920
1921 strescseq.narg = 0;
1922 strescseq.buf[strescseq.len] = '\0';
1923 while(p && strescseq.narg < STR_ARG_SIZ)
1924 strescseq.args[strescseq.narg++] = strsep(&p, ";");
1925 }
1926
1927 void
1928 strdump(void) {
1929 int i;
1930 uint c;
1931
1932 printf("ESC%c", strescseq.type);
1933 for(i = 0; i < strescseq.len; i++) {
1934 c = strescseq.buf[i] & 0xff;
1935 if(c == '\0') {
1936 return;
1937 } else if(isprint(c)) {
1938 putchar(c);
1939 } else if(c == '\n') {
1940 printf("(\\n)");
1941 } else if(c == '\r') {
1942 printf("(\\r)");
1943 } else if(c == 0x1b) {
1944 printf("(\\e)");
1945 } else {
1946 printf("(%02x)", c);
1947 }
1948 }
1949 printf("ESC\\\n");
1950 }
1951
1952 void
1953 strreset(void) {
1954 memset(&strescseq, 0, sizeof(strescseq));
1955 }
1956
1957 void
1958 tputtab(bool forward) {
1959 uint x = term.c.x;
1960
1961 if(forward) {
1962 if(x == term.col)
1963 return;
1964 for(++x; x < term.col && !term.tabs[x]; ++x)
1965 /* nothing */ ;
1966 } else {
1967 if(x == 0)
1968 return;
1969 for(--x; x > 0 && !term.tabs[x]; --x)
1970 /* nothing */ ;
1971 }
1972 tmoveto(x, term.c.y);
1973 }
1974
1975 void
1976 techo(char *buf, int len) {
1977 for(; len > 0; buf++, len--) {
1978 char c = *buf;
1979
1980 if(c == '\033') { /* escape */
1981 tputc("^", 1);
1982 tputc("[", 1);
1983 } else if(c < '\x20') { /* control code */
1984 if(c != '\n' && c != '\r' && c != '\t') {
1985 c |= '\x40';
1986 tputc("^", 1);
1987 }
1988 tputc(&c, 1);
1989 } else {
1990 break;
1991 }
1992 }
1993 if(len)
1994 tputc(buf, len);
1995 }
1996
1997 void
1998 tputc(char *c, int len) {
1999 uchar ascii = *c;
2000 bool control = ascii < '\x20' || ascii == 0177;
2001
2002 if(iofd != -1) {
2003 if(xwrite(iofd, c, len) < 0) {
2004 fprintf(stderr, "Error writing in %s:%s\n",
2005 opt_io, strerror(errno));
2006 close(iofd);
2007 iofd = -1;
2008 }
2009 }
2010
2011 /*
2012 * STR sequences must be checked before anything else
2013 * because it can use some control codes as part of the sequence.
2014 */
2015 if(term.esc & ESC_STR) {
2016 switch(ascii) {
2017 case '\033':
2018 term.esc = ESC_START | ESC_STR_END;
2019 break;
2020 case '\a': /* backwards compatibility to xterm */
2021 term.esc = 0;
2022 strhandle();
2023 break;
2024 default:
2025 if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2026 memmove(&strescseq.buf[strescseq.len], c, len);
2027 strescseq.len += len;
2028 } else {
2029 /*
2030 * Here is a bug in terminals. If the user never sends
2031 * some code to stop the str or esc command, then st
2032 * will stop responding. But this is better than
2033 * silently failing with unknown characters. At least
2034 * then users will report back.
2035 *
2036 * In the case users ever get fixed, here is the code:
2037 */
2038 /*
2039 * term.esc = 0;
2040 * strhandle();
2041 */
2042 }
2043 }
2044 return;
2045 }
2046
2047 /*
2048 * Actions of control codes must be performed as soon they arrive
2049 * because they can be embedded inside a control sequence, and
2050 * they must not cause conflicts with sequences.
2051 */
2052 if(control) {
2053 switch(ascii) {
2054 case '\t': /* HT */
2055 tputtab(1);
2056 return;
2057 case '\b': /* BS */
2058 tmoveto(term.c.x-1, term.c.y);
2059 return;
2060 case '\r': /* CR */
2061 tmoveto(0, term.c.y);
2062 return;
2063 case '\f': /* LF */
2064 case '\v': /* VT */
2065 case '\n': /* LF */
2066 /* go to first col if the mode is set */
2067 tnewline(IS_SET(MODE_CRLF));
2068 return;
2069 case '\a': /* BEL */
2070 if(!(xw.state & WIN_FOCUSED))
2071 xseturgency(1);
2072 return;
2073 case '\033': /* ESC */
2074 csireset();
2075 term.esc = ESC_START;
2076 return;
2077 case '\016': /* SO */
2078 case '\017': /* SI */
2079 /*
2080 * Different charsets are hard to handle. Applications
2081 * should use the right alt charset escapes for the
2082 * only reason they still exist: line drawing. The
2083 * rest is incompatible history st should not support.
2084 */
2085 return;
2086 case '\032': /* SUB */
2087 case '\030': /* CAN */
2088 csireset();
2089 return;
2090 case '\005': /* ENQ (IGNORED) */
2091 case '\000': /* NUL (IGNORED) */
2092 case '\021': /* XON (IGNORED) */
2093 case '\023': /* XOFF (IGNORED) */
2094 case 0177: /* DEL (IGNORED) */
2095 return;
2096 }
2097 } else if(term.esc & ESC_START) {
2098 if(term.esc & ESC_CSI) {
2099 csiescseq.buf[csiescseq.len++] = ascii;
2100 if(BETWEEN(ascii, 0x40, 0x7E)
2101 || csiescseq.len >= \
2102 sizeof(csiescseq.buf)-1) {
2103 term.esc = 0;
2104 csiparse();
2105 csihandle();
2106 }
2107 } else if(term.esc & ESC_STR_END) {
2108 term.esc = 0;
2109 if(ascii == '\\')
2110 strhandle();
2111 } else if(term.esc & ESC_ALTCHARSET) {
2112 switch(ascii) {
2113 case '0': /* Line drawing set */
2114 term.c.attr.mode |= ATTR_GFX;
2115 break;
2116 case 'B': /* USASCII */
2117 term.c.attr.mode &= ~ATTR_GFX;
2118 break;
2119 case 'A': /* UK (IGNORED) */
2120 case '<': /* multinational charset (IGNORED) */
2121 case '5': /* Finnish (IGNORED) */
2122 case 'C': /* Finnish (IGNORED) */
2123 case 'K': /* German (IGNORED) */
2124 break;
2125 default:
2126 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2127 }
2128 term.esc = 0;
2129 } else if(term.esc & ESC_TEST) {
2130 if(ascii == '8') { /* DEC screen alignment test. */
2131 char E[UTF_SIZ] = "E";
2132 int x, y;
2133
2134 for(x = 0; x < term.col; ++x) {
2135 for(y = 0; y < term.row; ++y)
2136 tsetchar(E, &term.c.attr, x, y);
2137 }
2138 }
2139 term.esc = 0;
2140 } else {
2141 switch(ascii) {
2142 case '[':
2143 term.esc |= ESC_CSI;
2144 break;
2145 case '#':
2146 term.esc |= ESC_TEST;
2147 break;
2148 case 'P': /* DCS -- Device Control String */
2149 case '_': /* APC -- Application Program Command */
2150 case '^': /* PM -- Privacy Message */
2151 case ']': /* OSC -- Operating System Command */
2152 case 'k': /* old title set compatibility */
2153 strreset();
2154 strescseq.type = ascii;
2155 term.esc |= ESC_STR;
2156 break;
2157 case '(': /* set primary charset G0 */
2158 term.esc |= ESC_ALTCHARSET;
2159 break;
2160 case ')': /* set secondary charset G1 (IGNORED) */
2161 case '*': /* set tertiary charset G2 (IGNORED) */
2162 case '+': /* set quaternary charset G3 (IGNORED) */
2163 term.esc = 0;
2164 break;
2165 case 'D': /* IND -- Linefeed */
2166 if(term.c.y == term.bot) {
2167 tscrollup(term.top, 1);
2168 } else {
2169 tmoveto(term.c.x, term.c.y+1);
2170 }
2171 term.esc = 0;
2172 break;
2173 case 'E': /* NEL -- Next line */
2174 tnewline(1); /* always go to first col */
2175 term.esc = 0;
2176 break;
2177 case 'H': /* HTS -- Horizontal tab stop */
2178 term.tabs[term.c.x] = 1;
2179 term.esc = 0;
2180 break;
2181 case 'M': /* RI -- Reverse index */
2182 if(term.c.y == term.top) {
2183 tscrolldown(term.top, 1);
2184 } else {
2185 tmoveto(term.c.x, term.c.y-1);
2186 }
2187 term.esc = 0;
2188 break;
2189 case 'Z': /* DECID -- Identify Terminal */
2190 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2191 term.esc = 0;
2192 break;
2193 case 'c': /* RIS -- Reset to inital state */
2194 treset();
2195 term.esc = 0;
2196 xresettitle();
2197 break;
2198 case '=': /* DECPAM -- Application keypad */
2199 term.mode |= MODE_APPKEYPAD;
2200 term.esc = 0;
2201 break;
2202 case '>': /* DECPNM -- Normal keypad */
2203 term.mode &= ~MODE_APPKEYPAD;
2204 term.esc = 0;
2205 break;
2206 case '7': /* DECSC -- Save Cursor */
2207 tcursor(CURSOR_SAVE);
2208 term.esc = 0;
2209 break;
2210 case '8': /* DECRC -- Restore Cursor */
2211 tcursor(CURSOR_LOAD);
2212 term.esc = 0;
2213 break;
2214 case '\\': /* ST -- Stop */
2215 term.esc = 0;
2216 break;
2217 default:
2218 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2219 (uchar) ascii, isprint(ascii)? ascii:'.');
2220 term.esc = 0;
2221 }
2222 }
2223 /*
2224 * All characters which form part of a sequence are not
2225 * printed
2226 */
2227 return;
2228 }
2229 /*
2230 * Display control codes only if we are in graphic mode
2231 */
2232 if(control && !(term.c.attr.mode & ATTR_GFX))
2233 return;
2234 if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
2235 sel.bx = -1;
2236 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
2237 tnewline(1); /* always go to first col */
2238
2239 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col) {
2240 memmove(&term.line[term.c.y][term.c.x+1],
2241 &term.line[term.c.y][term.c.x],
2242 (term.col - term.c.x - 1) * sizeof(Glyph));
2243 }
2244
2245 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2246 if(term.c.x+1 < term.col) {
2247 tmoveto(term.c.x+1, term.c.y);
2248 } else {
2249 term.c.state |= CURSOR_WRAPNEXT;
2250 }
2251 }
2252
2253 int
2254 tresize(int col, int row) {
2255 int i;
2256 int minrow = MIN(row, term.row);
2257 int mincol = MIN(col, term.col);
2258 int slide = term.c.y - row + 1;
2259 bool *bp;
2260 Line *orig;
2261
2262 if(col < 1 || row < 1)
2263 return 0;
2264
2265 /* free unneeded rows */
2266 i = 0;
2267 if(slide > 0) {
2268 /*
2269 * slide screen to keep cursor where we expect it -
2270 * tscrollup would work here, but we can optimize to
2271 * memmove because we're freeing the earlier lines
2272 */
2273 for(/* i = 0 */; i < slide; i++) {
2274 free(term.line[i]);
2275 free(term.alt[i]);
2276 }
2277 memmove(term.line, term.line + slide, row * sizeof(Line));
2278 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2279 }
2280 for(i += row; i < term.row; i++) {
2281 free(term.line[i]);
2282 free(term.alt[i]);
2283 }
2284
2285 /* resize to new height */
2286 term.line = xrealloc(term.line, row * sizeof(Line));
2287 term.alt = xrealloc(term.alt, row * sizeof(Line));
2288 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2289 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2290
2291 /* resize each row to new width, zero-pad if needed */
2292 for(i = 0; i < minrow; i++) {
2293 term.dirty[i] = 1;
2294 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2295 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2296 }
2297
2298 /* allocate any new rows */
2299 for(/* i == minrow */; i < row; i++) {
2300 term.dirty[i] = 1;
2301 term.line[i] = xcalloc(col, sizeof(Glyph));
2302 term.alt [i] = xcalloc(col, sizeof(Glyph));
2303 }
2304 if(col > term.col) {
2305 bp = term.tabs + term.col;
2306
2307 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2308 while(--bp > term.tabs && !*bp)
2309 /* nothing */ ;
2310 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2311 *bp = 1;
2312 }
2313 /* update terminal size */
2314 term.col = col;
2315 term.row = row;
2316 /* reset scrolling region */
2317 tsetscroll(0, row-1);
2318 /* make use of the LIMIT in tmoveto */
2319 tmoveto(term.c.x, term.c.y);
2320 /* Clearing both screens */
2321 orig = term.line;
2322 do {
2323 if(mincol < col && 0 < minrow) {
2324 tclearregion(mincol, 0, col - 1, minrow - 1);
2325 }
2326 if(0 < col && minrow < row) {
2327 tclearregion(0, minrow, col - 1, row - 1);
2328 }
2329 tswapscreen();
2330 } while(orig != term.line);
2331
2332 return (slide > 0);
2333 }
2334
2335 void
2336 xresize(int col, int row) {
2337 xw.tw = MAX(1, col * xw.cw);
2338 xw.th = MAX(1, row * xw.ch);
2339
2340 XFreePixmap(xw.dpy, xw.buf);
2341 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2342 DefaultDepth(xw.dpy, xw.scr));
2343 XftDrawChange(xw.draw, xw.buf);
2344 xclear(0, 0, xw.w, xw.h);
2345 }
2346
2347 static inline ushort
2348 sixd_to_16bit(int x) {
2349 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2350 }
2351
2352 void
2353 xloadcols(void) {
2354 int i, r, g, b;
2355 XRenderColor color = { .alpha = 0xffff };
2356
2357 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
2358 for(i = 0; i < LEN(colorname); i++) {
2359 if(!colorname[i])
2360 continue;
2361 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2362 die("Could not allocate color '%s'\n", colorname[i]);
2363 }
2364 }
2365
2366 /* load colors [16-255] ; same colors as xterm */
2367 for(i = 16, r = 0; r < 6; r++) {
2368 for(g = 0; g < 6; g++) {
2369 for(b = 0; b < 6; b++) {
2370 color.red = sixd_to_16bit(r);
2371 color.green = sixd_to_16bit(g);
2372 color.blue = sixd_to_16bit(b);
2373 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i])) {
2374 die("Could not allocate color %d\n", i);
2375 }
2376 i++;
2377 }
2378 }
2379 }
2380
2381 for(r = 0; r < 24; r++, i++) {
2382 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
2383 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color,
2384 &dc.col[i])) {
2385 die("Could not allocate color %d\n", i);
2386 }
2387 }
2388 }
2389
2390 int
2391 xsetcolorname(int x, const char *name) {
2392 XRenderColor color = { .alpha = 0xffff };
2393 Colour colour;
2394 if (x < 0 || x > LEN(colorname))
2395 return -1;
2396 if(!name) {
2397 if(16 <= x && x < 16 + 216) {
2398 int r = (x - 16) / 36, g = ((x - 16) % 36) / 6, b = (x - 16) % 6;
2399 color.red = sixd_to_16bit(r);
2400 color.green = sixd_to_16bit(g);
2401 color.blue = sixd_to_16bit(b);
2402 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2403 return 0; /* something went wrong */
2404 dc.col[x] = colour;
2405 return 1;
2406 } else if (16 + 216 <= x && x < 256) {
2407 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (x - (16 + 216));
2408 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2409 return 0; /* something went wrong */
2410 dc.col[x] = colour;
2411 return 1;
2412 } else {
2413 name = colorname[x];
2414 }
2415 }
2416 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &colour))
2417 return 0;
2418 dc.col[x] = colour;
2419 return 1;
2420 }
2421
2422 void
2423 xtermclear(int col1, int row1, int col2, int row2) {
2424 XftDrawRect(xw.draw,
2425 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2426 borderpx + col1 * xw.cw,
2427 borderpx + row1 * xw.ch,
2428 (col2-col1+1) * xw.cw,
2429 (row2-row1+1) * xw.ch);
2430 }
2431
2432 /*
2433 * Absolute coordinates.
2434 */
2435 void
2436 xclear(int x1, int y1, int x2, int y2) {
2437 XftDrawRect(xw.draw,
2438 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2439 x1, y1, x2-x1, y2-y1);
2440 }
2441
2442 void
2443 xhints(void) {
2444 XClassHint class = {opt_class ? opt_class : termname, termname};
2445 XWMHints wm = {.flags = InputHint, .input = 1};
2446 XSizeHints *sizeh = NULL;
2447
2448 sizeh = XAllocSizeHints();
2449 if(xw.isfixed == False) {
2450 sizeh->flags = PSize | PResizeInc | PBaseSize;
2451 sizeh->height = xw.h;
2452 sizeh->width = xw.w;
2453 sizeh->height_inc = xw.ch;
2454 sizeh->width_inc = xw.cw;
2455 sizeh->base_height = 2 * borderpx;
2456 sizeh->base_width = 2 * borderpx;
2457 } else {
2458 sizeh->flags = PMaxSize | PMinSize;
2459 sizeh->min_width = sizeh->max_width = xw.fw;
2460 sizeh->min_height = sizeh->max_height = xw.fh;
2461 }
2462
2463 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
2464 XFree(sizeh);
2465 }
2466
2467 int
2468 xloadfont(Font *f, FcPattern *pattern) {
2469 FcPattern *match;
2470 FcResult result;
2471
2472 match = FcFontMatch(NULL, pattern, &result);
2473 if(!match)
2474 return 1;
2475
2476 if(!(f->set = FcFontSort(0, match, FcTrue, 0, &result))) {
2477 FcPatternDestroy(match);
2478 return 1;
2479 }
2480
2481 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2482 FcPatternDestroy(match);
2483 return 1;
2484 }
2485
2486 f->pattern = FcPatternDuplicate(pattern);
2487
2488 f->ascent = f->match->ascent;
2489 f->descent = f->match->descent;
2490 f->lbearing = 0;
2491 f->rbearing = f->match->max_advance_width;
2492
2493 f->height = f->ascent + f->descent;
2494 f->width = f->lbearing + f->rbearing;
2495
2496 return 0;
2497 }
2498
2499 void
2500 xloadfonts(char *fontstr, int fontsize) {
2501 FcPattern *pattern;
2502 FcResult result;
2503 double fontval;
2504
2505 if(fontstr[0] == '-') {
2506 pattern = XftXlfdParse(fontstr, False, False);
2507 } else {
2508 pattern = FcNameParse((FcChar8 *)fontstr);
2509 }
2510
2511 if(!pattern)
2512 die("st: can't open font %s\n", fontstr);
2513
2514 if(fontsize > 0) {
2515 FcPatternDel(pattern, FC_PIXEL_SIZE);
2516 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2517 usedfontsize = fontsize;
2518 } else {
2519 result = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2520 if(result == FcResultMatch) {
2521 usedfontsize = (int)fontval;
2522 } else {
2523 /*
2524 * Default font size is 12, if none given. This is to
2525 * have a known usedfontsize value.
2526 */
2527 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
2528 usedfontsize = 12;
2529 }
2530 }
2531
2532 FcConfigSubstitute(0, pattern, FcMatchPattern);
2533 FcDefaultSubstitute(pattern);
2534
2535 if(xloadfont(&dc.font, pattern))
2536 die("st: can't open font %s\n", fontstr);
2537
2538 /* Setting character width and height. */
2539 xw.cw = dc.font.width;
2540 xw.ch = dc.font.height;
2541
2542 FcPatternDel(pattern, FC_SLANT);
2543 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
2544 if(xloadfont(&dc.ifont, pattern))
2545 die("st: can't open font %s\n", fontstr);
2546
2547 FcPatternDel(pattern, FC_WEIGHT);
2548 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
2549 if(xloadfont(&dc.ibfont, pattern))
2550 die("st: can't open font %s\n", fontstr);
2551
2552 FcPatternDel(pattern, FC_SLANT);
2553 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
2554 if(xloadfont(&dc.bfont, pattern))
2555 die("st: can't open font %s\n", fontstr);
2556
2557 FcPatternDestroy(pattern);
2558 }
2559
2560 void
2561 xunloadfonts(void) {
2562 int i, ip;
2563
2564 /*
2565 * Free the loaded fonts in the font cache. This is done backwards
2566 * from the frccur.
2567 */
2568 for(i = 0, ip = frccur; i < frclen; i++, ip--) {
2569 if(ip < 0)
2570 ip = LEN(frc) - 1;
2571 XftFontClose(xw.dpy, frc[ip].font);
2572 }
2573 frccur = -1;
2574 frclen = 0;
2575
2576 XftFontClose(xw.dpy, dc.font.match);
2577 FcPatternDestroy(dc.font.pattern);
2578 FcFontSetDestroy(dc.font.set);
2579 XftFontClose(xw.dpy, dc.bfont.match);
2580 FcPatternDestroy(dc.bfont.pattern);
2581 FcFontSetDestroy(dc.bfont.set);
2582 XftFontClose(xw.dpy, dc.ifont.match);
2583 FcPatternDestroy(dc.ifont.pattern);
2584 FcFontSetDestroy(dc.ifont.set);
2585 XftFontClose(xw.dpy, dc.ibfont.match);
2586 FcPatternDestroy(dc.ibfont.pattern);
2587 FcFontSetDestroy(dc.ibfont.set);
2588 }
2589
2590 void
2591 xzoom(const Arg *arg) {
2592 xunloadfonts();
2593 xloadfonts(usedfont, usedfontsize + arg->i);
2594 cresize(0, 0);
2595 redraw(0);
2596 }
2597
2598 void
2599 xinit(void) {
2600 XSetWindowAttributes attrs;
2601 XGCValues gcvalues;
2602 Cursor cursor;
2603 Window parent;
2604 int sw, sh;
2605
2606 if(!(xw.dpy = XOpenDisplay(NULL)))
2607 die("Can't open display\n");
2608 xw.scr = XDefaultScreen(xw.dpy);
2609 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
2610
2611 /* font */
2612 if(!FcInit())
2613 die("Could not init fontconfig.\n");
2614
2615 usedfont = (opt_font == NULL)? font : opt_font;
2616 xloadfonts(usedfont, 0);
2617
2618 /* colors */
2619 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
2620 xloadcols();
2621
2622 /* adjust fixed window geometry */
2623 if(xw.isfixed) {
2624 sw = DisplayWidth(xw.dpy, xw.scr);
2625 sh = DisplayHeight(xw.dpy, xw.scr);
2626 if(xw.fx < 0)
2627 xw.fx = sw + xw.fx - xw.fw - 1;
2628 if(xw.fy < 0)
2629 xw.fy = sh + xw.fy - xw.fh - 1;
2630
2631 xw.h = xw.fh;
2632 xw.w = xw.fw;
2633 } else {
2634 /* window - default size */
2635 xw.h = 2 * borderpx + term.row * xw.ch;
2636 xw.w = 2 * borderpx + term.col * xw.cw;
2637 xw.fx = 0;
2638 xw.fy = 0;
2639 }
2640
2641 /* Events */
2642 attrs.background_pixel = dc.col[defaultbg].pixel;
2643 attrs.border_pixel = dc.col[defaultbg].pixel;
2644 attrs.bit_gravity = NorthWestGravity;
2645 attrs.event_mask = FocusChangeMask | KeyPressMask
2646 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
2647 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
2648 attrs.colormap = xw.cmap;
2649
2650 parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
2651 XRootWindow(xw.dpy, xw.scr);
2652 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
2653 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
2654 xw.vis,
2655 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
2656 | CWColormap,
2657 &attrs);
2658
2659 memset(&gcvalues, 0, sizeof(gcvalues));
2660 gcvalues.graphics_exposures = False;
2661 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
2662 &gcvalues);
2663 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2664 DefaultDepth(xw.dpy, xw.scr));
2665 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
2666 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
2667
2668 /* Xft rendering context */
2669 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
2670
2671 /* input methods */
2672 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2673 XSetLocaleModifiers("@im=local");
2674 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2675 XSetLocaleModifiers("@im=");
2676 if((xw.xim = XOpenIM(xw.dpy,
2677 NULL, NULL, NULL)) == NULL) {
2678 die("XOpenIM failed. Could not open input"
2679 " device.\n");
2680 }
2681 }
2682 }
2683 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
2684 | XIMStatusNothing, XNClientWindow, xw.win,
2685 XNFocusWindow, xw.win, NULL);
2686 if(xw.xic == NULL)
2687 die("XCreateIC failed. Could not obtain input method.\n");
2688
2689 /* white cursor, black outline */
2690 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
2691 XDefineCursor(xw.dpy, xw.win, cursor);
2692 XRecolorCursor(xw.dpy, cursor,
2693 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
2694 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
2695
2696 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
2697 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
2698 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
2699
2700 xresettitle();
2701 XMapWindow(xw.dpy, xw.win);
2702 xhints();
2703 XSync(xw.dpy, 0);
2704 }
2705
2706 void
2707 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
2708 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
2709 width = charlen * xw.cw, xp, i;
2710 int frp, frcflags;
2711 int u8fl, u8fblen, u8cblen, doesexist;
2712 char *u8c, *u8fs;
2713 long u8char;
2714 Font *font = &dc.font;
2715 FcResult fcres;
2716 FcPattern *fcpattern, *fontpattern;
2717 FcFontSet *fcsets[] = { NULL };
2718 FcCharSet *fccharset;
2719 Colour *fg, *bg, *temp, revfg, revbg;
2720 XRenderColor colfg, colbg;
2721
2722 frcflags = FRC_NORMAL;
2723
2724 if(base.mode & ATTR_ITALIC) {
2725 if(base.fg == defaultfg)
2726 base.fg = defaultitalic;
2727 font = &dc.ifont;
2728 frcflags = FRC_ITALIC;
2729 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
2730 if(base.fg == defaultfg)
2731 base.fg = defaultitalic;
2732 font = &dc.ibfont;
2733 frcflags = FRC_ITALICBOLD;
2734 } else if(base.mode & ATTR_UNDERLINE) {
2735 if(base.fg == defaultfg)
2736 base.fg = defaultunderline;
2737 }
2738 fg = &dc.col[base.fg];
2739 bg = &dc.col[base.bg];
2740
2741 if(base.mode & ATTR_BOLD) {
2742 if(BETWEEN(base.fg, 0, 7)) {
2743 /* basic system colors */
2744 fg = &dc.col[base.fg + 8];
2745 } else if(BETWEEN(base.fg, 16, 195)) {
2746 /* 256 colors */
2747 fg = &dc.col[base.fg + 36];
2748 } else if(BETWEEN(base.fg, 232, 251)) {
2749 /* greyscale */
2750 fg = &dc.col[base.fg + 4];
2751 }
2752 /*
2753 * Those ranges will not be brightened:
2754 * 8 - 15 – bright system colors
2755 * 196 - 231 – highest 256 color cube
2756 * 252 - 255 – brightest colors in greyscale
2757 */
2758 font = &dc.bfont;
2759 frcflags = FRC_BOLD;
2760 }
2761
2762 if(IS_SET(MODE_REVERSE)) {
2763 if(fg == &dc.col[defaultfg]) {
2764 fg = &dc.col[defaultbg];
2765 } else {
2766 colfg.red = ~fg->color.red;
2767 colfg.green = ~fg->color.green;
2768 colfg.blue = ~fg->color.blue;
2769 colfg.alpha = fg->color.alpha;
2770 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
2771 fg = &revfg;
2772 }
2773
2774 if(bg == &dc.col[defaultbg]) {
2775 bg = &dc.col[defaultfg];
2776 } else {
2777 colbg.red = ~bg->color.red;
2778 colbg.green = ~bg->color.green;
2779 colbg.blue = ~bg->color.blue;
2780 colbg.alpha = bg->color.alpha;
2781 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &revbg);
2782 bg = &revbg;
2783 }
2784 }
2785
2786 if(base.mode & ATTR_REVERSE) {
2787 temp = fg;
2788 fg = bg;
2789 bg = temp;
2790 }
2791
2792 /* Intelligent cleaning up of the borders. */
2793 if(x == 0) {
2794 xclear(0, (y == 0)? 0 : winy, borderpx,
2795 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
2796 }
2797 if(x + charlen >= term.col) {
2798 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
2799 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
2800 }
2801 if(y == 0)
2802 xclear(winx, 0, winx + width, borderpx);
2803 if(y == term.row-1)
2804 xclear(winx, winy + xw.ch, winx + width, xw.h);
2805
2806 /* Clean up the region we want to draw to. */
2807 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
2808
2809 fcsets[0] = font->set;
2810 for(xp = winx; bytelen > 0;) {
2811 /*
2812 * Search for the range in the to be printed string of glyphs
2813 * that are in the main font. Then print that range. If
2814 * some glyph is found that is not in the font, do the
2815 * fallback dance.
2816 */
2817 u8fs = s;
2818 u8fblen = 0;
2819 u8fl = 0;
2820 for(;;) {
2821 u8c = s;
2822 u8cblen = utf8decode(s, &u8char);
2823 s += u8cblen;
2824 bytelen -= u8cblen;
2825
2826 doesexist = XftCharIndex(xw.dpy, font->match, u8char);
2827 if(!doesexist || bytelen <= 0) {
2828 if(bytelen <= 0) {
2829 if(doesexist) {
2830 u8fl++;
2831 u8fblen += u8cblen;
2832 }
2833 }
2834
2835 if(u8fl > 0) {
2836 XftDrawStringUtf8(xw.draw, fg,
2837 font->match, xp,
2838 winy + font->ascent,
2839 (FcChar8 *)u8fs,
2840 u8fblen);
2841 xp += font->width * u8fl;
2842 }
2843 break;
2844 }
2845
2846 u8fl++;
2847 u8fblen += u8cblen;
2848 }
2849 if(doesexist)
2850 break;
2851
2852 frp = frccur;
2853 /* Search the font cache. */
2854 for(i = 0; i < frclen; i++, frp--) {
2855 if(frp <= 0)
2856 frp = LEN(frc) - 1;
2857
2858 if(frc[frp].c == u8char
2859 && frc[frp].flags == frcflags) {
2860 break;
2861 }
2862 }
2863
2864 /* Nothing was found. */
2865 if(i >= frclen) {
2866 /*
2867 * Nothing was found in the cache. Now use
2868 * some dozen of Fontconfig calls to get the
2869 * font for one single character.
2870 */
2871 fcpattern = FcPatternDuplicate(font->pattern);
2872 fccharset = FcCharSetCreate();
2873
2874 FcCharSetAddChar(fccharset, u8char);
2875 FcPatternAddCharSet(fcpattern, FC_CHARSET,
2876 fccharset);
2877 FcPatternAddBool(fcpattern, FC_SCALABLE,
2878 FcTrue);
2879
2880 FcConfigSubstitute(0, fcpattern,
2881 FcMatchPattern);
2882 FcDefaultSubstitute(fcpattern);
2883
2884 fontpattern = FcFontSetMatch(0, fcsets,
2885 FcTrue, fcpattern, &fcres);
2886
2887 /*
2888 * Overwrite or create the new cache entry.
2889 */
2890 frccur++;
2891 frclen++;
2892 if(frccur >= LEN(frc))
2893 frccur = 0;
2894 if(frclen > LEN(frc)) {
2895 frclen = LEN(frc);
2896 XftFontClose(xw.dpy, frc[frccur].font);
2897 }
2898
2899 frc[frccur].font = XftFontOpenPattern(xw.dpy,
2900 fontpattern);
2901 frc[frccur].c = u8char;
2902 frc[frccur].flags = frcflags;
2903
2904 FcPatternDestroy(fcpattern);
2905 FcCharSetDestroy(fccharset);
2906
2907 frp = frccur;
2908 }
2909
2910 XftDrawStringUtf8(xw.draw, fg, frc[frp].font,
2911 xp, winy + frc[frp].font->ascent,
2912 (FcChar8 *)u8c, u8cblen);
2913
2914 xp += font->width;
2915 }
2916
2917 /*
2918 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
2919 winy + font->ascent, (FcChar8 *)s, bytelen);
2920 */
2921
2922 if(base.mode & ATTR_UNDERLINE) {
2923 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
2924 width, 1);
2925 }
2926 }
2927
2928 void
2929 xdrawcursor(void) {
2930 static int oldx = 0, oldy = 0;
2931 int sl;
2932 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
2933
2934 LIMIT(oldx, 0, term.col-1);
2935 LIMIT(oldy, 0, term.row-1);
2936
2937 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
2938
2939 /* remove the old cursor */
2940 sl = utf8size(term.line[oldy][oldx].c);
2941 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
2942 oldy, 1, sl);
2943
2944 /* draw the new one */
2945 if(!(IS_SET(MODE_HIDE))) {
2946 if(xw.state & WIN_FOCUSED) {
2947 if(IS_SET(MODE_REVERSE)) {
2948 g.mode |= ATTR_REVERSE;
2949 g.fg = defaultcs;
2950 g.bg = defaultfg;
2951 }
2952
2953 sl = utf8size(g.c);
2954 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
2955 } else {
2956 XftDrawRect(xw.draw, &dc.col[defaultcs],
2957 borderpx + term.c.x * xw.cw,
2958 borderpx + term.c.y * xw.ch,
2959 xw.cw - 1, 1);
2960 XftDrawRect(xw.draw, &dc.col[defaultcs],
2961 borderpx + term.c.x * xw.cw,
2962 borderpx + term.c.y * xw.ch,
2963 1, xw.ch - 1);
2964 XftDrawRect(xw.draw, &dc.col[defaultcs],
2965 borderpx + (term.c.x + 1) * xw.cw - 1,
2966 borderpx + term.c.y * xw.ch,
2967 1, xw.ch - 1);
2968 XftDrawRect(xw.draw, &dc.col[defaultcs],
2969 borderpx + term.c.x * xw.cw,
2970 borderpx + (term.c.y + 1) * xw.ch - 1,
2971 xw.cw, 1);
2972 }
2973 oldx = term.c.x, oldy = term.c.y;
2974 }
2975 }
2976
2977
2978 void
2979 xsettitle(char *p) {
2980 XTextProperty prop;
2981
2982 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
2983 &prop);
2984 XSetWMName(xw.dpy, xw.win, &prop);
2985 }
2986
2987 void
2988 xresettitle(void) {
2989 xsettitle(opt_title ? opt_title : "st");
2990 }
2991
2992 void
2993 redraw(int timeout) {
2994 struct timespec tv = {0, timeout * 1000};
2995
2996 tfulldirt();
2997 draw();
2998
2999 if(timeout > 0) {
3000 nanosleep(&tv, NULL);
3001 XSync(xw.dpy, False); /* necessary for a good tput flash */
3002 }
3003 }
3004
3005 void
3006 draw(void) {
3007 drawregion(0, 0, term.col, term.row);
3008 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3009 xw.h, 0, 0);
3010 XSetForeground(xw.dpy, dc.gc,
3011 dc.col[IS_SET(MODE_REVERSE)?
3012 defaultfg : defaultbg].pixel);
3013 }
3014
3015 void
3016 drawregion(int x1, int y1, int x2, int y2) {
3017 int ic, ib, x, y, ox, sl;
3018 Glyph base, new;
3019 char buf[DRAW_BUF_SIZ];
3020 bool ena_sel = sel.bx != -1;
3021
3022 if(sel.alt ^ IS_SET(MODE_ALTSCREEN))
3023 ena_sel = 0;
3024
3025 if(!(xw.state & WIN_VISIBLE))
3026 return;
3027
3028 for(y = y1; y < y2; y++) {
3029 if(!term.dirty[y])
3030 continue;
3031
3032 xtermclear(0, y, term.col, y);
3033 term.dirty[y] = 0;
3034 base = term.line[y][0];
3035 ic = ib = ox = 0;
3036 for(x = x1; x < x2; x++) {
3037 new = term.line[y][x];
3038 if(ena_sel && *(new.c) && selected(x, y))
3039 new.mode ^= ATTR_REVERSE;
3040 if(ib > 0 && (ATTRCMP(base, new)
3041 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3042 xdraws(buf, base, ox, y, ic, ib);
3043 ic = ib = 0;
3044 }
3045 if(ib == 0) {
3046 ox = x;
3047 base = new;
3048 }
3049
3050 sl = utf8size(new.c);
3051 memcpy(buf+ib, new.c, sl);
3052 ib += sl;
3053 ++ic;
3054 }
3055 if(ib > 0)
3056 xdraws(buf, base, ox, y, ic, ib);
3057 }
3058 xdrawcursor();
3059 }
3060
3061 void
3062 expose(XEvent *ev) {
3063 XExposeEvent *e = &ev->xexpose;
3064
3065 if(xw.state & WIN_REDRAW) {
3066 if(!e->count)
3067 xw.state &= ~WIN_REDRAW;
3068 }
3069 redraw(0);
3070 }
3071
3072 void
3073 visibility(XEvent *ev) {
3074 XVisibilityEvent *e = &ev->xvisibility;
3075
3076 if(e->state == VisibilityFullyObscured) {
3077 xw.state &= ~WIN_VISIBLE;
3078 } else if(!(xw.state & WIN_VISIBLE)) {
3079 /* need a full redraw for next Expose, not just a buf copy */
3080 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3081 }
3082 }
3083
3084 void
3085 unmap(XEvent *ev) {
3086 xw.state &= ~WIN_VISIBLE;
3087 }
3088
3089 void
3090 xseturgency(int add) {
3091 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3092
3093 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
3094 XSetWMHints(xw.dpy, xw.win, h);
3095 XFree(h);
3096 }
3097
3098 void
3099 focus(XEvent *ev) {
3100 XFocusChangeEvent *e = &ev->xfocus;
3101
3102 if(e->mode == NotifyGrab)
3103 return;
3104
3105 if(ev->type == FocusIn) {
3106 XSetICFocus(xw.xic);
3107 xw.state |= WIN_FOCUSED;
3108 xseturgency(0);
3109 } else {
3110 XUnsetICFocus(xw.xic);
3111 xw.state &= ~WIN_FOCUSED;
3112 }
3113 }
3114
3115 inline bool
3116 match(uint mask, uint state) {
3117 state &= ~(ignoremod);
3118
3119 if(mask == XK_NO_MOD && state)
3120 return false;
3121 if(mask != XK_ANY_MOD && mask != XK_NO_MOD && !state)
3122 return false;
3123 if((state & mask) != state)
3124 return false;
3125 return true;
3126 }
3127
3128 void
3129 numlock(const Arg *dummy) {
3130 term.numlock ^= 1;
3131 }
3132
3133 char*
3134 kmap(KeySym k, uint state) {
3135 uint mask;
3136 Key *kp;
3137 int i;
3138
3139 /* Check for mapped keys out of X11 function keys. */
3140 for(i = 0; i < LEN(mappedkeys); i++) {
3141 if(mappedkeys[i] == k)
3142 break;
3143 }
3144 if(i == LEN(mappedkeys)) {
3145 if((k & 0xFFFF) < 0xFD00)
3146 return NULL;
3147 }
3148
3149 for(kp = key; kp < key + LEN(key); kp++) {
3150 mask = kp->mask;
3151
3152 if(kp->k != k)
3153 continue;
3154
3155 if(!match(mask, state))
3156 continue;
3157
3158 if(kp->appkey > 0) {
3159 if(!IS_SET(MODE_APPKEYPAD))
3160 continue;
3161 if(term.numlock && kp->appkey == 2)
3162 continue;
3163 } else if(kp->appkey < 0 && IS_SET(MODE_APPKEYPAD)) {
3164 continue;
3165 }
3166
3167 if((kp->appcursor < 0 && IS_SET(MODE_APPCURSOR)) ||
3168 (kp->appcursor > 0
3169 && !IS_SET(MODE_APPCURSOR))) {
3170 continue;
3171 }
3172
3173 if((kp->crlf < 0 && IS_SET(MODE_CRLF)) ||
3174 (kp->crlf > 0 && !IS_SET(MODE_CRLF))) {
3175 continue;
3176 }
3177
3178 return kp->s;
3179 }
3180
3181 return NULL;
3182 }
3183
3184 void
3185 kpress(XEvent *ev) {
3186 XKeyEvent *e = &ev->xkey;
3187 KeySym ksym;
3188 char xstr[31], buf[32], *customkey, *cp = buf;
3189 int len;
3190 Status status;
3191 Shortcut *bp;
3192
3193 if(IS_SET(MODE_KBDLOCK))
3194 return;
3195
3196 len = XmbLookupString(xw.xic, e, xstr, sizeof(xstr), &ksym, &status);
3197 e->state &= ~Mod2Mask;
3198 /* 1. shortcuts */
3199 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3200 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3201 bp->func(&(bp->arg));
3202 return;
3203 }
3204 }
3205
3206 /* 2. custom keys from config.h */
3207 if((customkey = kmap(ksym, e->state))) {
3208 len = strlen(customkey);
3209 memcpy(buf, customkey, len);
3210 /* 2. hardcoded (overrides X lookup) */
3211 } else {
3212 if(len == 0)
3213 return;
3214
3215 if(len == 1 && e->state & Mod1Mask)
3216 *cp++ = '\033';
3217
3218 memcpy(cp, xstr, len);
3219 len = cp - buf + len;
3220 }
3221
3222 ttywrite(buf, len);
3223 if(IS_SET(MODE_ECHO))
3224 techo(buf, len);
3225 }
3226
3227
3228 void
3229 cmessage(XEvent *e) {
3230 /*
3231 * See xembed specs
3232 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3233 */
3234 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3235 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3236 xw.state |= WIN_FOCUSED;
3237 xseturgency(0);
3238 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3239 xw.state &= ~WIN_FOCUSED;
3240 }
3241 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3242 /* Send SIGHUP to shell */
3243 kill(pid, SIGHUP);
3244 exit(EXIT_SUCCESS);
3245 }
3246 }
3247
3248 void
3249 cresize(int width, int height) {
3250 int col, row;
3251
3252 if(width != 0)
3253 xw.w = width;
3254 if(height != 0)
3255 xw.h = height;
3256
3257 col = (xw.w - 2 * borderpx) / xw.cw;
3258 row = (xw.h - 2 * borderpx) / xw.ch;
3259
3260 tresize(col, row);
3261 xresize(col, row);
3262 ttyresize();
3263 }
3264
3265 void
3266 resize(XEvent *e) {
3267 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3268 return;
3269
3270 cresize(e->xconfigure.width, e->xconfigure.height);
3271 }
3272
3273 void
3274 run(void) {
3275 XEvent ev;
3276 fd_set rfd;
3277 int xfd = XConnectionNumber(xw.dpy), xev;
3278 struct timeval drawtimeout, *tv = NULL, now, last;
3279
3280 gettimeofday(&last, NULL);
3281
3282 for(xev = actionfps;;) {
3283 FD_ZERO(&rfd);
3284 FD_SET(cmdfd, &rfd);
3285 FD_SET(xfd, &rfd);
3286 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
3287 if(errno == EINTR)
3288 continue;
3289 die("select failed: %s\n", SERRNO);
3290 }
3291
3292 gettimeofday(&now, NULL);
3293 drawtimeout.tv_sec = 0;
3294 drawtimeout.tv_usec = (1000/xfps) * 1000;
3295 tv = &drawtimeout;
3296
3297 if(FD_ISSET(cmdfd, &rfd))
3298 ttyread();
3299
3300 if(FD_ISSET(xfd, &rfd))
3301 xev = actionfps;
3302
3303 if(TIMEDIFF(now, last) > \
3304 (xev ? (1000/xfps) : (1000/actionfps))) {
3305 while(XPending(xw.dpy)) {
3306 XNextEvent(xw.dpy, &ev);
3307 if(XFilterEvent(&ev, None))
3308 continue;
3309 if(handler[ev.type])
3310 (handler[ev.type])(&ev);
3311 }
3312
3313 draw();
3314 XFlush(xw.dpy);
3315 last = now;
3316
3317 if(xev && !FD_ISSET(xfd, &rfd))
3318 xev--;
3319 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd))
3320 tv = NULL;
3321 }
3322 }
3323 }
3324
3325 void
3326 usage(void) {
3327 die("%s " VERSION " (c) 2010-2013 st engineers\n" \
3328 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]" \
3329 " [-t title] [-w windowid] [-e command ...]\n", argv0);
3330 }
3331
3332 int
3333 main(int argc, char *argv[]) {
3334 int bitm, xr, yr;
3335 uint wr, hr;
3336
3337 xw.fw = xw.fh = xw.fx = xw.fy = 0;
3338 xw.isfixed = False;
3339
3340 ARGBEGIN {
3341 case 'a':
3342 allowaltscreen = false;
3343 break;
3344 case 'c':
3345 opt_class = EARGF(usage());
3346 break;
3347 case 'e':
3348 /* eat all remaining arguments */
3349 if(argc > 1)
3350 opt_cmd = &argv[1];
3351 goto run;
3352 case 'f':
3353 opt_font = EARGF(usage());
3354 break;
3355 case 'g':
3356 bitm = XParseGeometry(EARGF(usage()), &xr, &yr, &wr, &hr);
3357 if(bitm & XValue)
3358 xw.fx = xr;
3359 if(bitm & YValue)
3360 xw.fy = yr;
3361 if(bitm & WidthValue)
3362 xw.fw = (int)wr;
3363 if(bitm & HeightValue)
3364 xw.fh = (int)hr;
3365 if(bitm & XNegative && xw.fx == 0)
3366 xw.fx = -1;
3367 if(bitm & XNegative && xw.fy == 0)
3368 xw.fy = -1;
3369
3370 if(xw.fh != 0 && xw.fw != 0)
3371 xw.isfixed = True;
3372 break;
3373 case 'o':
3374 opt_io = EARGF(usage());
3375 break;
3376 case 't':
3377 opt_title = EARGF(usage());
3378 break;
3379 case 'w':
3380 opt_embed = EARGF(usage());
3381 break;
3382 case 'v':
3383 default:
3384 usage();
3385 } ARGEND;
3386
3387 run:
3388 setlocale(LC_CTYPE, "");
3389 XSetLocaleModifiers("");
3390 tnew(80, 24);
3391 xinit();
3392 ttynew();
3393 selinit();
3394 if(xw.isfixed)
3395 cresize(xw.h, xw.w);
3396 run();
3397
3398 return 0;
3399 }
3400