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Making rectangular selection work again.
[st.git] / st.c
1 /* See LICENSE for licence details. */
2 #include <ctype.h>
3 #include <errno.h>
4 #include <fcntl.h>
5 #include <limits.h>
6 #include <locale.h>
7 #include <pwd.h>
8 #include <stdarg.h>
9 #include <stdbool.h>
10 #include <stdio.h>
11 #include <stdlib.h>
12 #include <string.h>
13 #include <signal.h>
14 #include <sys/ioctl.h>
15 #include <sys/select.h>
16 #include <sys/stat.h>
17 #include <sys/time.h>
18 #include <sys/types.h>
19 #include <sys/wait.h>
20 #include <time.h>
21 #include <unistd.h>
22 #include <X11/Xatom.h>
23 #include <X11/Xlib.h>
24 #include <X11/Xutil.h>
25 #include <X11/cursorfont.h>
26 #include <X11/keysym.h>
27 #include <X11/Xft/Xft.h>
28 #include <fontconfig/fontconfig.h>
29
30 #define Glyph Glyph_
31 #define Font Font_
32 #define Draw XftDraw *
33 #define Colour XftColor
34 #define Colourmap Colormap
35
36 #if defined(__linux)
37 #include <pty.h>
38 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
39 #include <util.h>
40 #elif defined(__FreeBSD__) || defined(__DragonFly__)
41 #include <libutil.h>
42 #endif
43
44 #define USAGE \
45 "st " VERSION " (c) 2010-2013 st engineers\n" \
46 "usage: st [-v] [-c class] [-f font] [-g geometry] [-o file]" \
47 " [-t title] [-w windowid] [-e command ...]\n"
48
49 /* XEMBED messages */
50 #define XEMBED_FOCUS_IN 4
51 #define XEMBED_FOCUS_OUT 5
52
53 /* Arbitrary sizes */
54 #define UTF_SIZ 4
55 #define ESC_BUF_SIZ (128*UTF_SIZ)
56 #define ESC_ARG_SIZ 16
57 #define STR_BUF_SIZ ESC_BUF_SIZ
58 #define STR_ARG_SIZ ESC_ARG_SIZ
59 #define DRAW_BUF_SIZ 20*1024
60 #define XK_ANY_MOD UINT_MAX
61 #define XK_NO_MOD 0
62 #define XK_SWITCH_MOD (1<<13)
63
64 #define REDRAW_TIMEOUT (80*1000) /* 80 ms */
65
66 /* macros */
67 #define SERRNO strerror(errno)
68 #define MIN(a, b) ((a) < (b) ? (a) : (b))
69 #define MAX(a, b) ((a) < (b) ? (b) : (a))
70 #define LEN(a) (sizeof(a) / sizeof(a[0]))
71 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
72 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
73 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
74 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
75 #define IS_SET(flag) ((term.mode & (flag)) != 0)
76 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_usec-t2.tv_usec)/1000)
77
78 #define VT102ID "\033[?6c"
79
80 enum glyph_attribute {
81 ATTR_NULL = 0,
82 ATTR_REVERSE = 1,
83 ATTR_UNDERLINE = 2,
84 ATTR_BOLD = 4,
85 ATTR_GFX = 8,
86 ATTR_ITALIC = 16,
87 ATTR_BLINK = 32,
88 };
89
90 enum cursor_movement {
91 CURSOR_SAVE,
92 CURSOR_LOAD
93 };
94
95 enum cursor_state {
96 CURSOR_DEFAULT = 0,
97 CURSOR_WRAPNEXT = 1,
98 CURSOR_ORIGIN = 2
99 };
100
101 enum glyph_state {
102 GLYPH_SET = 1,
103 GLYPH_DIRTY = 2
104 };
105
106 enum term_mode {
107 MODE_WRAP = 1,
108 MODE_INSERT = 2,
109 MODE_APPKEYPAD = 4,
110 MODE_ALTSCREEN = 8,
111 MODE_CRLF = 16,
112 MODE_MOUSEBTN = 32,
113 MODE_MOUSEMOTION = 64,
114 MODE_MOUSE = 32|64,
115 MODE_REVERSE = 128,
116 MODE_KBDLOCK = 256,
117 MODE_HIDE = 512,
118 MODE_ECHO = 1024,
119 MODE_APPCURSOR = 2048,
120 MODE_MOUSESGR = 4096,
121 };
122
123 enum escape_state {
124 ESC_START = 1,
125 ESC_CSI = 2,
126 ESC_STR = 4, /* DSC, OSC, PM, APC */
127 ESC_ALTCHARSET = 8,
128 ESC_STR_END = 16, /* a final string was encountered */
129 ESC_TEST = 32, /* Enter in test mode */
130 };
131
132 enum window_state {
133 WIN_VISIBLE = 1,
134 WIN_REDRAW = 2,
135 WIN_FOCUSED = 4
136 };
137
138 enum selection_type {
139 SEL_REGULAR = 1,
140 SEL_RECTANGULAR = 2
141 };
142
143 /* bit macro */
144 #undef B0
145 enum { B0=1, B1=2, B2=4, B3=8, B4=16, B5=32, B6=64, B7=128 };
146
147 typedef unsigned char uchar;
148 typedef unsigned int uint;
149 typedef unsigned long ulong;
150 typedef unsigned short ushort;
151
152 typedef struct {
153 char c[UTF_SIZ]; /* character code */
154 uchar mode; /* attribute flags */
155 ushort fg; /* foreground */
156 ushort bg; /* background */
157 uchar state; /* state flags */
158 } Glyph;
159
160 typedef Glyph *Line;
161
162 typedef struct {
163 Glyph attr; /* current char attributes */
164 int x;
165 int y;
166 char state;
167 } TCursor;
168
169 /* CSI Escape sequence structs */
170 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
171 typedef struct {
172 char buf[ESC_BUF_SIZ]; /* raw string */
173 int len; /* raw string length */
174 char priv;
175 int arg[ESC_ARG_SIZ];
176 int narg; /* nb of args */
177 char mode;
178 } CSIEscape;
179
180 /* STR Escape sequence structs */
181 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
182 typedef struct {
183 char type; /* ESC type ... */
184 char buf[STR_BUF_SIZ]; /* raw string */
185 int len; /* raw string length */
186 char *args[STR_ARG_SIZ];
187 int narg; /* nb of args */
188 } STREscape;
189
190 /* Internal representation of the screen */
191 typedef struct {
192 int row; /* nb row */
193 int col; /* nb col */
194 Line *line; /* screen */
195 Line *alt; /* alternate screen */
196 bool *dirty; /* dirtyness of lines */
197 TCursor c; /* cursor */
198 int top; /* top scroll limit */
199 int bot; /* bottom scroll limit */
200 int mode; /* terminal mode flags */
201 int esc; /* escape state flags */
202 bool numlock; /* lock numbers in keyboard */
203 bool *tabs;
204 } Term;
205
206 /* Purely graphic info */
207 typedef struct {
208 Display *dpy;
209 Colourmap cmap;
210 Window win;
211 Drawable buf;
212 Atom xembed, wmdeletewin;
213 XIM xim;
214 XIC xic;
215 Draw draw;
216 Visual *vis;
217 int scr;
218 bool isfixed; /* is fixed geometry? */
219 int fx, fy, fw, fh; /* fixed geometry */
220 int tw, th; /* tty width and height */
221 int w, h; /* window width and height */
222 int ch; /* char height */
223 int cw; /* char width */
224 char state; /* focus, redraw, visible */
225 } XWindow;
226
227 typedef struct {
228 KeySym k;
229 uint mask;
230 char s[ESC_BUF_SIZ];
231 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
232 signed char appkey; /* application keypad */
233 signed char appcursor; /* application cursor */
234 signed char crlf; /* crlf mode */
235 } Key;
236
237 /* TODO: use better name for vars... */
238 typedef struct {
239 int mode;
240 int type;
241 int bx, by;
242 int ex, ey;
243 struct {
244 int x, y;
245 } b, e;
246 char *clip;
247 Atom xtarget;
248 bool alt;
249 struct timeval tclick1;
250 struct timeval tclick2;
251 } Selection;
252
253 typedef union {
254 int i;
255 unsigned int ui;
256 float f;
257 const void *v;
258 } Arg;
259
260 typedef struct {
261 unsigned int mod;
262 KeySym keysym;
263 void (*func)(const Arg *);
264 const Arg arg;
265 } Shortcut;
266
267 /* function definitions used in config.h */
268 static void clippaste(const Arg *);
269 static void numlock(const Arg *);
270 static void selpaste(const Arg *);
271 static void xzoom(const Arg *);
272
273 /* Config.h for applying patches and the configuration. */
274 #include "config.h"
275
276 /* Font structure */
277 typedef struct {
278 int height;
279 int width;
280 int ascent;
281 int descent;
282 short lbearing;
283 short rbearing;
284 XftFont *match;
285 FcFontSet *set;
286 FcPattern *pattern;
287 } Font;
288
289 /* Drawing Context */
290 typedef struct {
291 Colour col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
292 Font font, bfont, ifont, ibfont;
293 GC gc;
294 } DC;
295
296 static void die(const char *, ...);
297 static void draw(void);
298 static void redraw(int);
299 static void drawregion(int, int, int, int);
300 static void execsh(void);
301 static void sigchld(int);
302 static void run(void);
303
304 static void csidump(void);
305 static void csihandle(void);
306 static void csiparse(void);
307 static void csireset(void);
308 static void strdump(void);
309 static void strhandle(void);
310 static void strparse(void);
311 static void strreset(void);
312
313 static void tclearregion(int, int, int, int, int);
314 static void tcursor(int);
315 static void tdeletechar(int);
316 static void tdeleteline(int);
317 static void tinsertblank(int);
318 static void tinsertblankline(int);
319 static void tmoveto(int, int);
320 static void tmoveato(int x, int y);
321 static void tnew(int, int);
322 static void tnewline(int);
323 static void tputtab(bool);
324 static void tputc(char *, int);
325 static void treset(void);
326 static int tresize(int, int);
327 static void tscrollup(int, int);
328 static void tscrolldown(int, int);
329 static void tsetattr(int*, int);
330 static void tsetchar(char *, Glyph *, int, int);
331 static void tsetscroll(int, int);
332 static void tswapscreen(void);
333 static void tsetdirt(int, int);
334 static void tsetmode(bool, bool, int *, int);
335 static void tfulldirt(void);
336 static void techo(char *, int);
337
338 static inline bool match(uint, uint);
339 static void ttynew(void);
340 static void ttyread(void);
341 static void ttyresize(void);
342 static void ttywrite(const char *, size_t);
343
344 static void xdraws(char *, Glyph, int, int, int, int);
345 static void xhints(void);
346 static void xclear(int, int, int, int);
347 static void xdrawcursor(void);
348 static void xinit(void);
349 static void xloadcols(void);
350 static int xsetcolorname(int, const char *);
351 static int xloadfont(Font *, FcPattern *);
352 static void xloadfonts(char *, int);
353 static void xsettitle(char *);
354 static void xresettitle(void);
355 static void xseturgency(int);
356 static void xsetsel(char*);
357 static void xtermclear(int, int, int, int);
358 static void xunloadfonts(void);
359 static void xresize(int, int);
360
361 static void expose(XEvent *);
362 static void visibility(XEvent *);
363 static void unmap(XEvent *);
364 static char *kmap(KeySym, uint);
365 static void kpress(XEvent *);
366 static void cmessage(XEvent *);
367 static void cresize(int, int);
368 static void resize(XEvent *);
369 static void focus(XEvent *);
370 static void brelease(XEvent *);
371 static void bpress(XEvent *);
372 static void bmotion(XEvent *);
373 static void selnotify(XEvent *);
374 static void selclear(XEvent *);
375 static void selrequest(XEvent *);
376
377 static void selinit(void);
378 static inline bool selected(int, int);
379 static void selcopy(void);
380 static void selscroll(int, int);
381
382 static int utf8decode(char *, long *);
383 static int utf8encode(long *, char *);
384 static int utf8size(char *);
385 static int isfullutf8(char *, int);
386
387 static ssize_t xwrite(int, char *, size_t);
388 static void *xmalloc(size_t);
389 static void *xrealloc(void *, size_t);
390 static void *xcalloc(size_t, size_t);
391
392 static void (*handler[LASTEvent])(XEvent *) = {
393 [KeyPress] = kpress,
394 [ClientMessage] = cmessage,
395 [ConfigureNotify] = resize,
396 [VisibilityNotify] = visibility,
397 [UnmapNotify] = unmap,
398 [Expose] = expose,
399 [FocusIn] = focus,
400 [FocusOut] = focus,
401 [MotionNotify] = bmotion,
402 [ButtonPress] = bpress,
403 [ButtonRelease] = brelease,
404 [SelectionClear] = selclear,
405 [SelectionNotify] = selnotify,
406 [SelectionRequest] = selrequest,
407 };
408
409 /* Globals */
410 static DC dc;
411 static XWindow xw;
412 static Term term;
413 static CSIEscape csiescseq;
414 static STREscape strescseq;
415 static int cmdfd;
416 static pid_t pid;
417 static Selection sel;
418 static int iofd = -1;
419 static char **opt_cmd = NULL;
420 static char *opt_io = NULL;
421 static char *opt_title = NULL;
422 static char *opt_embed = NULL;
423 static char *opt_class = NULL;
424 static char *opt_font = NULL;
425
426 static char *usedfont = NULL;
427 static int usedfontsize = 0;
428
429 /* Font Ring Cache */
430 enum {
431 FRC_NORMAL,
432 FRC_ITALIC,
433 FRC_BOLD,
434 FRC_ITALICBOLD
435 };
436
437 typedef struct {
438 XftFont *font;
439 long c;
440 int flags;
441 } Fontcache;
442
443 /*
444 * Fontcache is a ring buffer, with frccur as current position and frclen as
445 * the current length of used elements.
446 */
447
448 static Fontcache frc[1024];
449 static int frccur = -1, frclen = 0;
450
451 ssize_t
452 xwrite(int fd, char *s, size_t len) {
453 size_t aux = len;
454
455 while(len > 0) {
456 ssize_t r = write(fd, s, len);
457 if(r < 0)
458 return r;
459 len -= r;
460 s += r;
461 }
462 return aux;
463 }
464
465 void *
466 xmalloc(size_t len) {
467 void *p = malloc(len);
468
469 if(!p)
470 die("Out of memory\n");
471
472 return p;
473 }
474
475 void *
476 xrealloc(void *p, size_t len) {
477 if((p = realloc(p, len)) == NULL)
478 die("Out of memory\n");
479
480 return p;
481 }
482
483 void *
484 xcalloc(size_t nmemb, size_t size) {
485 void *p = calloc(nmemb, size);
486
487 if(!p)
488 die("Out of memory\n");
489
490 return p;
491 }
492
493 int
494 utf8decode(char *s, long *u) {
495 uchar c;
496 int i, n, rtn;
497
498 rtn = 1;
499 c = *s;
500 if(~c & B7) { /* 0xxxxxxx */
501 *u = c;
502 return rtn;
503 } else if((c & (B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */
504 *u = c&(B4|B3|B2|B1|B0);
505 n = 1;
506 } else if((c & (B7|B6|B5|B4)) == (B7|B6|B5)) { /* 1110xxxx */
507 *u = c&(B3|B2|B1|B0);
508 n = 2;
509 } else if((c & (B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) { /* 11110xxx */
510 *u = c & (B2|B1|B0);
511 n = 3;
512 } else {
513 goto invalid;
514 }
515
516 for(i = n, ++s; i > 0; --i, ++rtn, ++s) {
517 c = *s;
518 if((c & (B7|B6)) != B7) /* 10xxxxxx */
519 goto invalid;
520 *u <<= 6;
521 *u |= c & (B5|B4|B3|B2|B1|B0);
522 }
523
524 if((n == 1 && *u < 0x80) ||
525 (n == 2 && *u < 0x800) ||
526 (n == 3 && *u < 0x10000) ||
527 (*u >= 0xD800 && *u <= 0xDFFF)) {
528 goto invalid;
529 }
530
531 return rtn;
532 invalid:
533 *u = 0xFFFD;
534
535 return rtn;
536 }
537
538 int
539 utf8encode(long *u, char *s) {
540 uchar *sp;
541 ulong uc;
542 int i, n;
543
544 sp = (uchar *)s;
545 uc = *u;
546 if(uc < 0x80) {
547 *sp = uc; /* 0xxxxxxx */
548 return 1;
549 } else if(*u < 0x800) {
550 *sp = (uc >> 6) | (B7|B6); /* 110xxxxx */
551 n = 1;
552 } else if(uc < 0x10000) {
553 *sp = (uc >> 12) | (B7|B6|B5); /* 1110xxxx */
554 n = 2;
555 } else if(uc <= 0x10FFFF) {
556 *sp = (uc >> 18) | (B7|B6|B5|B4); /* 11110xxx */
557 n = 3;
558 } else {
559 goto invalid;
560 }
561
562 for(i=n,++sp; i>0; --i,++sp)
563 *sp = ((uc >> 6*(i-1)) & (B5|B4|B3|B2|B1|B0)) | B7; /* 10xxxxxx */
564
565 return n+1;
566 invalid:
567 /* U+FFFD */
568 *s++ = '\xEF';
569 *s++ = '\xBF';
570 *s = '\xBD';
571
572 return 3;
573 }
574
575 /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
576 UTF-8 otherwise return 0 */
577 int
578 isfullutf8(char *s, int b) {
579 uchar *c1, *c2, *c3;
580
581 c1 = (uchar *)s;
582 c2 = (uchar *)++s;
583 c3 = (uchar *)++s;
584 if(b < 1) {
585 return 0;
586 } else if((*c1&(B7|B6|B5)) == (B7|B6) && b == 1) {
587 return 0;
588 } else if((*c1&(B7|B6|B5|B4)) == (B7|B6|B5) &&
589 ((b == 1) ||
590 ((b == 2) && (*c2&(B7|B6)) == B7))) {
591 return 0;
592 } else if((*c1&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4) &&
593 ((b == 1) ||
594 ((b == 2) && (*c2&(B7|B6)) == B7) ||
595 ((b == 3) && (*c2&(B7|B6)) == B7 && (*c3&(B7|B6)) == B7))) {
596 return 0;
597 } else {
598 return 1;
599 }
600 }
601
602 int
603 utf8size(char *s) {
604 uchar c = *s;
605
606 if(~c&B7) {
607 return 1;
608 } else if((c&(B7|B6|B5)) == (B7|B6)) {
609 return 2;
610 } else if((c&(B7|B6|B5|B4)) == (B7|B6|B5)) {
611 return 3;
612 } else {
613 return 4;
614 }
615 }
616
617 void
618 selinit(void) {
619 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
620 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
621 sel.mode = 0;
622 sel.bx = -1;
623 sel.clip = NULL;
624 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
625 if(sel.xtarget == None)
626 sel.xtarget = XA_STRING;
627 }
628
629 static int
630 x2col(int x) {
631 x -= borderpx;
632 x /= xw.cw;
633
634 return LIMIT(x, 0, term.col-1);
635 }
636
637 static int
638 y2row(int y) {
639 y -= borderpx;
640 y /= xw.ch;
641
642 return LIMIT(y, 0, term.row-1);
643 }
644
645 static inline bool
646 selected(int x, int y) {
647 int bx, ex;
648
649 if(sel.ey == y && sel.by == y) {
650 bx = MIN(sel.bx, sel.ex);
651 ex = MAX(sel.bx, sel.ex);
652
653 return BETWEEN(x, bx, ex);
654 }
655
656 switch(sel.type) {
657 case SEL_REGULAR:
658 return ((sel.b.y < y && y < sel.e.y)
659 || (y == sel.e.y && x <= sel.e.x))
660 || (y == sel.b.y && x >= sel.b.x
661 && (x <= sel.e.x || sel.b.y != sel.e.y));
662 case SEL_RECTANGULAR:
663 return ((sel.b.y <= y && y <= sel.e.y)
664 && (sel.b.x <= x && x <= sel.e.x));
665 };
666 }
667
668 void
669 getbuttoninfo(XEvent *e) {
670 int type;
671 uint state = e->xbutton.state &~Button1Mask;
672
673 sel.alt = IS_SET(MODE_ALTSCREEN);
674
675 sel.ex = x2col(e->xbutton.x);
676 sel.ey = y2row(e->xbutton.y);
677
678 sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
679 sel.b.y = MIN(sel.by, sel.ey);
680 sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
681 sel.e.y = MAX(sel.by, sel.ey);
682
683 sel.type = SEL_REGULAR;
684 for(type = 1; type < LEN(selmasks); ++type) {
685 if(match(selmasks[type], state)) {
686 sel.type = type;
687 break;
688 }
689 }
690 }
691
692 void
693 mousereport(XEvent *e) {
694 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
695 button = e->xbutton.button, state = e->xbutton.state,
696 len;
697 char buf[40];
698 static int ob, ox, oy;
699
700 /* from urxvt */
701 if(e->xbutton.type == MotionNotify) {
702 if(!IS_SET(MODE_MOUSEMOTION) || (x == ox && y == oy))
703 return;
704 button = ob + 32;
705 ox = x, oy = y;
706 } else if(!IS_SET(MODE_MOUSESGR)
707 && (e->xbutton.type == ButtonRelease
708 || button == AnyButton)) {
709 button = 3;
710 } else {
711 button -= Button1;
712 if(button >= 3)
713 button += 64 - 3;
714 if(e->xbutton.type == ButtonPress) {
715 ob = button;
716 ox = x, oy = y;
717 }
718 }
719
720 button += (state & ShiftMask ? 4 : 0)
721 + (state & Mod4Mask ? 8 : 0)
722 + (state & ControlMask ? 16 : 0);
723
724 len = 0;
725 if(IS_SET(MODE_MOUSESGR)) {
726 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
727 button, x+1, y+1,
728 e->xbutton.type == ButtonRelease ? 'm' : 'M');
729 } else if(x < 223 && y < 223) {
730 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
731 32+button, 32+x+1, 32+y+1);
732 } else {
733 return;
734 }
735
736 ttywrite(buf, len);
737 }
738
739 void
740 bpress(XEvent *e) {
741 if(IS_SET(MODE_MOUSE)) {
742 mousereport(e);
743 } else if(e->xbutton.button == Button1) {
744 if(sel.bx != -1) {
745 sel.bx = -1;
746 tsetdirt(sel.b.y, sel.e.y);
747 draw();
748 }
749 sel.mode = 1;
750 sel.type = SEL_REGULAR;
751 sel.ex = sel.bx = x2col(e->xbutton.x);
752 sel.ey = sel.by = y2row(e->xbutton.y);
753 } else if(e->xbutton.button == Button4) {
754 ttywrite("\031", 1);
755 } else if(e->xbutton.button == Button5) {
756 ttywrite("\005", 1);
757 }
758 }
759
760 void
761 selcopy(void) {
762 char *str, *ptr, *p;
763 int x, y, bufsize, is_selected = 0, size;
764 Glyph *gp, *last;
765
766 if(sel.bx == -1) {
767 str = NULL;
768 } else {
769 bufsize = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
770 ptr = str = xmalloc(bufsize);
771
772 /* append every set & selected glyph to the selection */
773 for(y = sel.b.y; y < sel.e.y + 1; y++) {
774 is_selected = 0;
775 gp = &term.line[y][0];
776 last = gp + term.col;
777
778 while(--last >= gp && !(last->state & GLYPH_SET))
779 /* nothing */;
780
781 for(x = 0; gp <= last; x++, ++gp) {
782 if(!selected(x, y)) {
783 continue;
784 } else {
785 is_selected = 1;
786 }
787
788 p = (gp->state & GLYPH_SET) ? gp->c : " ";
789 size = utf8size(p);
790 memcpy(ptr, p, size);
791 ptr += size;
792 }
793 /* \n at the end of every selected line except for the last one */
794 if(is_selected && y < sel.e.y)
795 *ptr++ = '\r';
796 }
797 *ptr = 0;
798 }
799 xsetsel(str);
800 }
801
802 void
803 selnotify(XEvent *e) {
804 ulong nitems, ofs, rem;
805 int format;
806 uchar *data;
807 Atom type;
808
809 ofs = 0;
810 do {
811 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
812 False, AnyPropertyType, &type, &format,
813 &nitems, &rem, &data)) {
814 fprintf(stderr, "Clipboard allocation failed\n");
815 return;
816 }
817 ttywrite((const char *) data, nitems * format / 8);
818 XFree(data);
819 /* number of 32-bit chunks returned */
820 ofs += nitems * format / 32;
821 } while(rem > 0);
822 }
823
824 void
825 selpaste(const Arg *dummy) {
826 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
827 xw.win, CurrentTime);
828 }
829
830 void
831 clippaste(const Arg *dummy) {
832 Atom clipboard;
833
834 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
835 XConvertSelection(xw.dpy, clipboard, sel.xtarget, XA_PRIMARY,
836 xw.win, CurrentTime);
837 }
838
839 void
840 selclear(XEvent *e) {
841 if(sel.bx == -1)
842 return;
843 sel.bx = -1;
844 tsetdirt(sel.b.y, sel.e.y);
845 }
846
847 void
848 selrequest(XEvent *e) {
849 XSelectionRequestEvent *xsre;
850 XSelectionEvent xev;
851 Atom xa_targets, string;
852
853 xsre = (XSelectionRequestEvent *) e;
854 xev.type = SelectionNotify;
855 xev.requestor = xsre->requestor;
856 xev.selection = xsre->selection;
857 xev.target = xsre->target;
858 xev.time = xsre->time;
859 /* reject */
860 xev.property = None;
861
862 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
863 if(xsre->target == xa_targets) {
864 /* respond with the supported type */
865 string = sel.xtarget;
866 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
867 XA_ATOM, 32, PropModeReplace,
868 (uchar *) &string, 1);
869 xev.property = xsre->property;
870 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
871 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
872 xsre->target, 8, PropModeReplace,
873 (uchar *) sel.clip, strlen(sel.clip));
874 xev.property = xsre->property;
875 }
876
877 /* all done, send a notification to the listener */
878 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
879 fprintf(stderr, "Error sending SelectionNotify event\n");
880 }
881
882 void
883 xsetsel(char *str) {
884 /* register the selection for both the clipboard and the primary */
885 Atom clipboard;
886
887 free(sel.clip);
888 sel.clip = str;
889
890 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
891
892 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
893 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
894 }
895
896 void
897 brelease(XEvent *e) {
898 struct timeval now;
899
900 if(IS_SET(MODE_MOUSE)) {
901 mousereport(e);
902 return;
903 }
904
905 if(e->xbutton.button == Button2) {
906 selpaste(NULL);
907 } else if(e->xbutton.button == Button1) {
908 sel.mode = 0;
909 getbuttoninfo(e);
910 term.dirty[sel.ey] = 1;
911 if(sel.bx == sel.ex && sel.by == sel.ey) {
912 sel.bx = -1;
913 gettimeofday(&now, NULL);
914
915 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
916 /* triple click on the line */
917 sel.b.x = sel.bx = 0;
918 sel.e.x = sel.ex = term.col;
919 sel.b.y = sel.e.y = sel.ey;
920 selcopy();
921 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
922 /* double click to select word */
923 sel.bx = sel.ex;
924 while(sel.bx > 0 && term.line[sel.ey][sel.bx-1].state & GLYPH_SET &&
925 term.line[sel.ey][sel.bx-1].c[0] != ' ') {
926 sel.bx--;
927 }
928 sel.b.x = sel.bx;
929 while(sel.ex < term.col-1 && term.line[sel.ey][sel.ex+1].state & GLYPH_SET &&
930 term.line[sel.ey][sel.ex+1].c[0] != ' ') {
931 sel.ex++;
932 }
933 sel.e.x = sel.ex;
934 sel.b.y = sel.e.y = sel.ey;
935 selcopy();
936 }
937 } else {
938 selcopy();
939 }
940 }
941
942 memcpy(&sel.tclick2, &sel.tclick1, sizeof(struct timeval));
943 gettimeofday(&sel.tclick1, NULL);
944 }
945
946 void
947 bmotion(XEvent *e) {
948 int oldey, oldex, oldsby, oldsey;
949
950 if(IS_SET(MODE_MOUSE)) {
951 mousereport(e);
952 return;
953 }
954
955 if(!sel.mode)
956 return;
957
958 oldey = sel.ey;
959 oldex = sel.ex;
960 oldsby = sel.b.y;
961 oldsey = sel.e.y;
962 getbuttoninfo(e);
963
964 if(oldey != sel.ey || oldex != sel.ex) {
965 tsetdirt(MIN(sel.b.y, oldsby), MAX(sel.e.y, oldsey));
966 }
967 }
968
969 void
970 die(const char *errstr, ...) {
971 va_list ap;
972
973 va_start(ap, errstr);
974 vfprintf(stderr, errstr, ap);
975 va_end(ap);
976 exit(EXIT_FAILURE);
977 }
978
979 void
980 execsh(void) {
981 char **args;
982 char *envshell = getenv("SHELL");
983 const struct passwd *pass = getpwuid(getuid());
984 char buf[sizeof(long) * 8 + 1];
985
986 unsetenv("COLUMNS");
987 unsetenv("LINES");
988 unsetenv("TERMCAP");
989
990 if(pass) {
991 setenv("LOGNAME", pass->pw_name, 1);
992 setenv("USER", pass->pw_name, 1);
993 setenv("SHELL", pass->pw_shell, 0);
994 setenv("HOME", pass->pw_dir, 0);
995 }
996
997 snprintf(buf, sizeof(buf), "%lu", xw.win);
998 setenv("WINDOWID", buf, 1);
999
1000 signal(SIGCHLD, SIG_DFL);
1001 signal(SIGHUP, SIG_DFL);
1002 signal(SIGINT, SIG_DFL);
1003 signal(SIGQUIT, SIG_DFL);
1004 signal(SIGTERM, SIG_DFL);
1005 signal(SIGALRM, SIG_DFL);
1006
1007 DEFAULT(envshell, shell);
1008 setenv("TERM", termname, 1);
1009 args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
1010 execvp(args[0], args);
1011 exit(EXIT_FAILURE);
1012 }
1013
1014 void
1015 sigchld(int a) {
1016 int stat = 0;
1017
1018 if(waitpid(pid, &stat, 0) < 0)
1019 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
1020
1021 if(WIFEXITED(stat)) {
1022 exit(WEXITSTATUS(stat));
1023 } else {
1024 exit(EXIT_FAILURE);
1025 }
1026 }
1027
1028 void
1029 ttynew(void) {
1030 int m, s;
1031 struct winsize w = {term.row, term.col, 0, 0};
1032
1033 /* seems to work fine on linux, openbsd and freebsd */
1034 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1035 die("openpty failed: %s\n", SERRNO);
1036
1037 switch(pid = fork()) {
1038 case -1:
1039 die("fork failed\n");
1040 break;
1041 case 0:
1042 setsid(); /* create a new process group */
1043 dup2(s, STDIN_FILENO);
1044 dup2(s, STDOUT_FILENO);
1045 dup2(s, STDERR_FILENO);
1046 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1047 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
1048 close(s);
1049 close(m);
1050 execsh();
1051 break;
1052 default:
1053 close(s);
1054 cmdfd = m;
1055 signal(SIGCHLD, sigchld);
1056 if(opt_io) {
1057 iofd = (!strcmp(opt_io, "-")) ?
1058 STDOUT_FILENO :
1059 open(opt_io, O_WRONLY | O_CREAT, 0666);
1060 if(iofd < 0) {
1061 fprintf(stderr, "Error opening %s:%s\n",
1062 opt_io, strerror(errno));
1063 }
1064 }
1065 }
1066 }
1067
1068 void
1069 dump(char c) {
1070 static int col;
1071
1072 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
1073 if(++col % 10 == 0)
1074 fprintf(stderr, "\n");
1075 }
1076
1077 void
1078 ttyread(void) {
1079 static char buf[BUFSIZ];
1080 static int buflen = 0;
1081 char *ptr;
1082 char s[UTF_SIZ];
1083 int charsize; /* size of utf8 char in bytes */
1084 long utf8c;
1085 int ret;
1086
1087 /* append read bytes to unprocessed bytes */
1088 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1089 die("Couldn't read from shell: %s\n", SERRNO);
1090
1091 /* process every complete utf8 char */
1092 buflen += ret;
1093 ptr = buf;
1094 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
1095 charsize = utf8decode(ptr, &utf8c);
1096 utf8encode(&utf8c, s);
1097 tputc(s, charsize);
1098 ptr += charsize;
1099 buflen -= charsize;
1100 }
1101
1102 /* keep any uncomplete utf8 char for the next call */
1103 memmove(buf, ptr, buflen);
1104 }
1105
1106 void
1107 ttywrite(const char *s, size_t n) {
1108 if(write(cmdfd, s, n) == -1)
1109 die("write error on tty: %s\n", SERRNO);
1110 }
1111
1112 void
1113 ttyresize(void) {
1114 struct winsize w;
1115
1116 w.ws_row = term.row;
1117 w.ws_col = term.col;
1118 w.ws_xpixel = xw.tw;
1119 w.ws_ypixel = xw.th;
1120 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1121 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
1122 }
1123
1124 void
1125 tsetdirt(int top, int bot) {
1126 int i;
1127
1128 LIMIT(top, 0, term.row-1);
1129 LIMIT(bot, 0, term.row-1);
1130
1131 for(i = top; i <= bot; i++)
1132 term.dirty[i] = 1;
1133 }
1134
1135 void
1136 tfulldirt(void) {
1137 tsetdirt(0, term.row-1);
1138 }
1139
1140 void
1141 tcursor(int mode) {
1142 static TCursor c;
1143
1144 if(mode == CURSOR_SAVE) {
1145 c = term.c;
1146 } else if(mode == CURSOR_LOAD) {
1147 term.c = c;
1148 tmoveto(c.x, c.y);
1149 }
1150 }
1151
1152 void
1153 treset(void) {
1154 uint i;
1155
1156 term.c = (TCursor){{
1157 .mode = ATTR_NULL,
1158 .fg = defaultfg,
1159 .bg = defaultbg
1160 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1161
1162 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1163 for(i = tabspaces; i < term.col; i += tabspaces)
1164 term.tabs[i] = 1;
1165 term.top = 0;
1166 term.bot = term.row - 1;
1167 term.mode = MODE_WRAP;
1168
1169 tclearregion(0, 0, term.col-1, term.row-1, 0);
1170 tmoveto(0, 0);
1171 tcursor(CURSOR_SAVE);
1172 }
1173
1174 void
1175 tnew(int col, int row) {
1176 /* set screen size */
1177 term.row = row;
1178 term.col = col;
1179 term.line = xmalloc(term.row * sizeof(Line));
1180 term.alt = xmalloc(term.row * sizeof(Line));
1181 term.dirty = xmalloc(term.row * sizeof(*term.dirty));
1182 term.tabs = xmalloc(term.col * sizeof(*term.tabs));
1183
1184 for(row = 0; row < term.row; row++) {
1185 term.line[row] = xmalloc(term.col * sizeof(Glyph));
1186 term.alt [row] = xmalloc(term.col * sizeof(Glyph));
1187 term.dirty[row] = 0;
1188 }
1189
1190 term.numlock = 1;
1191 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1192 /* setup screen */
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, 0);
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, 0);
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 switch(sel.type) {
1258 case SEL_REGULAR:
1259 if(sel.by < term.top) {
1260 sel.by = term.top;
1261 sel.bx = 0;
1262 }
1263 if(sel.ey > term.bot) {
1264 sel.ey = term.bot;
1265 sel.ex = term.col;
1266 }
1267 break;
1268 case SEL_RECTANGULAR:
1269 if(sel.by < term.top)
1270 sel.by = term.top;
1271 if(sel.ey > term.bot)
1272 sel.ey = term.bot;
1273 break;
1274 };
1275 sel.b.y = sel.by, sel.b.x = sel.bx;
1276 sel.e.y = sel.ey, sel.e.x = sel.ex;
1277 }
1278 }
1279
1280 void
1281 tnewline(int first_col) {
1282 int y = term.c.y;
1283
1284 if(y == term.bot) {
1285 tscrollup(term.top, 1);
1286 } else {
1287 y++;
1288 }
1289 tmoveto(first_col ? 0 : term.c.x, y);
1290 }
1291
1292 void
1293 csiparse(void) {
1294 char *p = csiescseq.buf, *np;
1295 long int v;
1296
1297 csiescseq.narg = 0;
1298 if(*p == '?') {
1299 csiescseq.priv = 1;
1300 p++;
1301 }
1302
1303 csiescseq.buf[csiescseq.len] = '\0';
1304 while(p < csiescseq.buf+csiescseq.len) {
1305 np = NULL;
1306 v = strtol(p, &np, 10);
1307 if(np == p)
1308 v = 0;
1309 if(v == LONG_MAX || v == LONG_MIN)
1310 v = -1;
1311 csiescseq.arg[csiescseq.narg++] = v;
1312 p = np;
1313 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1314 break;
1315 p++;
1316 }
1317 csiescseq.mode = *p;
1318 }
1319
1320 /* for absolute user moves, when decom is set */
1321 void
1322 tmoveato(int x, int y) {
1323 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1324 }
1325
1326 void
1327 tmoveto(int x, int y) {
1328 int miny, maxy;
1329
1330 if(term.c.state & CURSOR_ORIGIN) {
1331 miny = term.top;
1332 maxy = term.bot;
1333 } else {
1334 miny = 0;
1335 maxy = term.row - 1;
1336 }
1337 LIMIT(x, 0, term.col-1);
1338 LIMIT(y, miny, maxy);
1339 term.c.state &= ~CURSOR_WRAPNEXT;
1340 term.c.x = x;
1341 term.c.y = y;
1342 }
1343
1344 void
1345 tsetchar(char *c, Glyph *attr, int x, int y) {
1346 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1347 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1348 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1349 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1350 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1351 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1352 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1353 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1354 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1355 };
1356
1357 /*
1358 * The table is proudly stolen from rxvt.
1359 */
1360 if(attr->mode & ATTR_GFX) {
1361 if(c[0] >= 0x41 && c[0] <= 0x7e
1362 && vt100_0[c[0] - 0x41]) {
1363 c = vt100_0[c[0] - 0x41];
1364 }
1365 }
1366
1367 term.dirty[y] = 1;
1368 term.line[y][x] = *attr;
1369 memcpy(term.line[y][x].c, c, UTF_SIZ);
1370 term.line[y][x].state |= GLYPH_SET;
1371 }
1372
1373 void
1374 tclearregion(int x1, int y1, int x2, int y2, int bce) {
1375 int x, y, temp;
1376
1377 if(x1 > x2)
1378 temp = x1, x1 = x2, x2 = temp;
1379 if(y1 > y2)
1380 temp = y1, y1 = y2, y2 = temp;
1381
1382 LIMIT(x1, 0, term.col-1);
1383 LIMIT(x2, 0, term.col-1);
1384 LIMIT(y1, 0, term.row-1);
1385 LIMIT(y2, 0, term.row-1);
1386
1387 for(y = y1; y <= y2; y++) {
1388 term.dirty[y] = 1;
1389 for(x = x1; x <= x2; x++) {
1390 if(bce) {
1391 term.line[y][x] = term.c.attr;
1392 memcpy(term.line[y][x].c, " ", 2);
1393 term.line[y][x].state |= GLYPH_SET;
1394 } else {
1395 term.line[y][x].state = 0;
1396 }
1397 }
1398 }
1399 }
1400
1401 void
1402 tdeletechar(int n) {
1403 int src = term.c.x + n;
1404 int dst = term.c.x;
1405 int size = term.col - src;
1406
1407 term.dirty[term.c.y] = 1;
1408
1409 if(src >= term.col) {
1410 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 0);
1411 return;
1412 }
1413
1414 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1415 size * sizeof(Glyph));
1416 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y, 0);
1417 }
1418
1419 void
1420 tinsertblank(int n) {
1421 int src = term.c.x;
1422 int dst = src + n;
1423 int size = term.col - dst;
1424
1425 term.dirty[term.c.y] = 1;
1426
1427 if(dst >= term.col) {
1428 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 0);
1429 return;
1430 }
1431
1432 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1433 size * sizeof(Glyph));
1434 tclearregion(src, term.c.y, dst - 1, term.c.y, 0);
1435 }
1436
1437 void
1438 tinsertblankline(int n) {
1439 if(term.c.y < term.top || term.c.y > term.bot)
1440 return;
1441
1442 tscrolldown(term.c.y, n);
1443 }
1444
1445 void
1446 tdeleteline(int n) {
1447 if(term.c.y < term.top || term.c.y > term.bot)
1448 return;
1449
1450 tscrollup(term.c.y, n);
1451 }
1452
1453 void
1454 tsetattr(int *attr, int l) {
1455 int i;
1456
1457 for(i = 0; i < l; i++) {
1458 switch(attr[i]) {
1459 case 0:
1460 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD \
1461 | ATTR_ITALIC | ATTR_BLINK);
1462 term.c.attr.fg = defaultfg;
1463 term.c.attr.bg = defaultbg;
1464 break;
1465 case 1:
1466 term.c.attr.mode |= ATTR_BOLD;
1467 break;
1468 case 3:
1469 term.c.attr.mode |= ATTR_ITALIC;
1470 break;
1471 case 4:
1472 term.c.attr.mode |= ATTR_UNDERLINE;
1473 break;
1474 case 5: /* slow blink */
1475 case 6: /* rapid blink */
1476 term.c.attr.mode |= ATTR_BLINK;
1477 break;
1478 case 7:
1479 term.c.attr.mode |= ATTR_REVERSE;
1480 break;
1481 case 21:
1482 case 22:
1483 term.c.attr.mode &= ~ATTR_BOLD;
1484 break;
1485 case 23:
1486 term.c.attr.mode &= ~ATTR_ITALIC;
1487 break;
1488 case 24:
1489 term.c.attr.mode &= ~ATTR_UNDERLINE;
1490 break;
1491 case 25:
1492 case 26:
1493 term.c.attr.mode &= ~ATTR_BLINK;
1494 break;
1495 case 27:
1496 term.c.attr.mode &= ~ATTR_REVERSE;
1497 break;
1498 case 38:
1499 if(i + 2 < l && attr[i + 1] == 5) {
1500 i += 2;
1501 if(BETWEEN(attr[i], 0, 255)) {
1502 term.c.attr.fg = attr[i];
1503 } else {
1504 fprintf(stderr,
1505 "erresc: bad fgcolor %d\n",
1506 attr[i]);
1507 }
1508 } else {
1509 fprintf(stderr,
1510 "erresc(38): gfx attr %d unknown\n",
1511 attr[i]);
1512 }
1513 break;
1514 case 39:
1515 term.c.attr.fg = defaultfg;
1516 break;
1517 case 48:
1518 if(i + 2 < l && attr[i + 1] == 5) {
1519 i += 2;
1520 if(BETWEEN(attr[i], 0, 255)) {
1521 term.c.attr.bg = attr[i];
1522 } else {
1523 fprintf(stderr,
1524 "erresc: bad bgcolor %d\n",
1525 attr[i]);
1526 }
1527 } else {
1528 fprintf(stderr,
1529 "erresc(48): gfx attr %d unknown\n",
1530 attr[i]);
1531 }
1532 break;
1533 case 49:
1534 term.c.attr.bg = defaultbg;
1535 break;
1536 default:
1537 if(BETWEEN(attr[i], 30, 37)) {
1538 term.c.attr.fg = attr[i] - 30;
1539 } else if(BETWEEN(attr[i], 40, 47)) {
1540 term.c.attr.bg = attr[i] - 40;
1541 } else if(BETWEEN(attr[i], 90, 97)) {
1542 term.c.attr.fg = attr[i] - 90 + 8;
1543 } else if(BETWEEN(attr[i], 100, 107)) {
1544 term.c.attr.bg = attr[i] - 100 + 8;
1545 } else {
1546 fprintf(stderr,
1547 "erresc(default): gfx attr %d unknown\n",
1548 attr[i]), csidump();
1549 }
1550 break;
1551 }
1552 }
1553 }
1554
1555 void
1556 tsetscroll(int t, int b) {
1557 int temp;
1558
1559 LIMIT(t, 0, term.row-1);
1560 LIMIT(b, 0, term.row-1);
1561 if(t > b) {
1562 temp = t;
1563 t = b;
1564 b = temp;
1565 }
1566 term.top = t;
1567 term.bot = b;
1568 }
1569
1570 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1571
1572 void
1573 tsetmode(bool priv, bool set, int *args, int narg) {
1574 int *lim, mode;
1575 bool alt;
1576
1577 for(lim = args + narg; args < lim; ++args) {
1578 if(priv) {
1579 switch(*args) {
1580 break;
1581 case 1: /* DECCKM -- Cursor key */
1582 MODBIT(term.mode, set, MODE_APPCURSOR);
1583 break;
1584 case 5: /* DECSCNM -- Reverse video */
1585 mode = term.mode;
1586 MODBIT(term.mode, set, MODE_REVERSE);
1587 if(mode != term.mode)
1588 redraw(REDRAW_TIMEOUT);
1589 break;
1590 case 6: /* DECOM -- Origin */
1591 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1592 tmoveato(0, 0);
1593 break;
1594 case 7: /* DECAWM -- Auto wrap */
1595 MODBIT(term.mode, set, MODE_WRAP);
1596 break;
1597 case 0: /* Error (IGNORED) */
1598 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1599 case 3: /* DECCOLM -- Column (IGNORED) */
1600 case 4: /* DECSCLM -- Scroll (IGNORED) */
1601 case 8: /* DECARM -- Auto repeat (IGNORED) */
1602 case 18: /* DECPFF -- Printer feed (IGNORED) */
1603 case 19: /* DECPEX -- Printer extent (IGNORED) */
1604 case 42: /* DECNRCM -- National characters (IGNORED) */
1605 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1606 break;
1607 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1608 MODBIT(term.mode, !set, MODE_HIDE);
1609 break;
1610 case 1000: /* 1000,1002: enable xterm mouse report */
1611 MODBIT(term.mode, set, MODE_MOUSEBTN);
1612 MODBIT(term.mode, 0, MODE_MOUSEMOTION);
1613 break;
1614 case 1002:
1615 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1616 MODBIT(term.mode, 0, MODE_MOUSEBTN);
1617 break;
1618 case 1006:
1619 MODBIT(term.mode, set, MODE_MOUSESGR);
1620 break;
1621 case 1049: /* = 1047 and 1048 */
1622 case 47:
1623 case 1047: {
1624 alt = IS_SET(MODE_ALTSCREEN);
1625 if(alt) {
1626 tclearregion(0, 0, term.col-1,
1627 term.row-1, 0);
1628 }
1629 if(set ^ alt) /* set is always 1 or 0 */
1630 tswapscreen();
1631 if(*args != 1049)
1632 break;
1633 }
1634 /* pass through */
1635 case 1048:
1636 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1637 break;
1638 default:
1639 fprintf(stderr,
1640 "erresc: unknown private set/reset mode %d\n",
1641 *args);
1642 break;
1643 }
1644 } else {
1645 switch(*args) {
1646 case 0: /* Error (IGNORED) */
1647 break;
1648 case 2: /* KAM -- keyboard action */
1649 MODBIT(term.mode, set, MODE_KBDLOCK);
1650 break;
1651 case 4: /* IRM -- Insertion-replacement */
1652 MODBIT(term.mode, set, MODE_INSERT);
1653 break;
1654 case 12: /* SRM -- Send/Receive */
1655 MODBIT(term.mode, !set, MODE_ECHO);
1656 break;
1657 case 20: /* LNM -- Linefeed/new line */
1658 MODBIT(term.mode, set, MODE_CRLF);
1659 break;
1660 default:
1661 fprintf(stderr,
1662 "erresc: unknown set/reset mode %d\n",
1663 *args);
1664 break;
1665 }
1666 }
1667 }
1668 }
1669 #undef MODBIT
1670
1671
1672 void
1673 csihandle(void) {
1674 switch(csiescseq.mode) {
1675 default:
1676 unknown:
1677 fprintf(stderr, "erresc: unknown csi ");
1678 csidump();
1679 /* die(""); */
1680 break;
1681 case '@': /* ICH -- Insert <n> blank char */
1682 DEFAULT(csiescseq.arg[0], 1);
1683 tinsertblank(csiescseq.arg[0]);
1684 break;
1685 case 'A': /* CUU -- Cursor <n> Up */
1686 DEFAULT(csiescseq.arg[0], 1);
1687 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1688 break;
1689 case 'B': /* CUD -- Cursor <n> Down */
1690 case 'e': /* VPR --Cursor <n> Down */
1691 DEFAULT(csiescseq.arg[0], 1);
1692 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1693 break;
1694 case 'c': /* DA -- Device Attributes */
1695 if(csiescseq.arg[0] == 0)
1696 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1697 break;
1698 case 'C': /* CUF -- Cursor <n> Forward */
1699 case 'a': /* HPR -- Cursor <n> Forward */
1700 DEFAULT(csiescseq.arg[0], 1);
1701 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1702 break;
1703 case 'D': /* CUB -- Cursor <n> Backward */
1704 DEFAULT(csiescseq.arg[0], 1);
1705 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1706 break;
1707 case 'E': /* CNL -- Cursor <n> Down and first col */
1708 DEFAULT(csiescseq.arg[0], 1);
1709 tmoveto(0, term.c.y+csiescseq.arg[0]);
1710 break;
1711 case 'F': /* CPL -- Cursor <n> Up and first col */
1712 DEFAULT(csiescseq.arg[0], 1);
1713 tmoveto(0, term.c.y-csiescseq.arg[0]);
1714 break;
1715 case 'g': /* TBC -- Tabulation clear */
1716 switch(csiescseq.arg[0]) {
1717 case 0: /* clear current tab stop */
1718 term.tabs[term.c.x] = 0;
1719 break;
1720 case 3: /* clear all the tabs */
1721 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1722 break;
1723 default:
1724 goto unknown;
1725 }
1726 break;
1727 case 'G': /* CHA -- Move to <col> */
1728 case '`': /* HPA */
1729 DEFAULT(csiescseq.arg[0], 1);
1730 tmoveto(csiescseq.arg[0]-1, term.c.y);
1731 break;
1732 case 'H': /* CUP -- Move to <row> <col> */
1733 case 'f': /* HVP */
1734 DEFAULT(csiescseq.arg[0], 1);
1735 DEFAULT(csiescseq.arg[1], 1);
1736 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1737 break;
1738 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1739 DEFAULT(csiescseq.arg[0], 1);
1740 while(csiescseq.arg[0]--)
1741 tputtab(1);
1742 break;
1743 case 'J': /* ED -- Clear screen */
1744 sel.bx = -1;
1745 switch(csiescseq.arg[0]) {
1746 case 0: /* below */
1747 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 1);
1748 if(term.c.y < term.row-1) {
1749 tclearregion(0, term.c.y+1, term.col-1,
1750 term.row-1, 1);
1751 }
1752 break;
1753 case 1: /* above */
1754 if(term.c.y > 1)
1755 tclearregion(0, 0, term.col-1, term.c.y-1, 1);
1756 tclearregion(0, term.c.y, term.c.x, term.c.y, 1);
1757 break;
1758 case 2: /* all */
1759 tclearregion(0, 0, term.col-1, term.row-1, 1);
1760 break;
1761 default:
1762 goto unknown;
1763 }
1764 break;
1765 case 'K': /* EL -- Clear line */
1766 switch(csiescseq.arg[0]) {
1767 case 0: /* right */
1768 tclearregion(term.c.x, term.c.y, term.col-1,
1769 term.c.y, 1);
1770 break;
1771 case 1: /* left */
1772 tclearregion(0, term.c.y, term.c.x, term.c.y, 1);
1773 break;
1774 case 2: /* all */
1775 tclearregion(0, term.c.y, term.col-1, term.c.y, 1);
1776 break;
1777 }
1778 break;
1779 case 'S': /* SU -- Scroll <n> line up */
1780 DEFAULT(csiescseq.arg[0], 1);
1781 tscrollup(term.top, csiescseq.arg[0]);
1782 break;
1783 case 'T': /* SD -- Scroll <n> line down */
1784 DEFAULT(csiescseq.arg[0], 1);
1785 tscrolldown(term.top, csiescseq.arg[0]);
1786 break;
1787 case 'L': /* IL -- Insert <n> blank lines */
1788 DEFAULT(csiescseq.arg[0], 1);
1789 tinsertblankline(csiescseq.arg[0]);
1790 break;
1791 case 'l': /* RM -- Reset Mode */
1792 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
1793 break;
1794 case 'M': /* DL -- Delete <n> lines */
1795 DEFAULT(csiescseq.arg[0], 1);
1796 tdeleteline(csiescseq.arg[0]);
1797 break;
1798 case 'X': /* ECH -- Erase <n> char */
1799 DEFAULT(csiescseq.arg[0], 1);
1800 tclearregion(term.c.x, term.c.y,
1801 term.c.x + csiescseq.arg[0] - 1, term.c.y, 1);
1802 break;
1803 case 'P': /* DCH -- Delete <n> char */
1804 DEFAULT(csiescseq.arg[0], 1);
1805 tdeletechar(csiescseq.arg[0]);
1806 break;
1807 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
1808 DEFAULT(csiescseq.arg[0], 1);
1809 while(csiescseq.arg[0]--)
1810 tputtab(0);
1811 break;
1812 case 'd': /* VPA -- Move to <row> */
1813 DEFAULT(csiescseq.arg[0], 1);
1814 tmoveato(term.c.x, csiescseq.arg[0]-1);
1815 break;
1816 case 'h': /* SM -- Set terminal mode */
1817 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
1818 break;
1819 case 'm': /* SGR -- Terminal attribute (color) */
1820 tsetattr(csiescseq.arg, csiescseq.narg);
1821 break;
1822 case 'r': /* DECSTBM -- Set Scrolling Region */
1823 if(csiescseq.priv) {
1824 goto unknown;
1825 } else {
1826 DEFAULT(csiescseq.arg[0], 1);
1827 DEFAULT(csiescseq.arg[1], term.row);
1828 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
1829 tmoveato(0, 0);
1830 }
1831 break;
1832 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1833 tcursor(CURSOR_SAVE);
1834 break;
1835 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1836 tcursor(CURSOR_LOAD);
1837 break;
1838 }
1839 }
1840
1841 void
1842 csidump(void) {
1843 int i;
1844 uint c;
1845
1846 printf("ESC[");
1847 for(i = 0; i < csiescseq.len; i++) {
1848 c = csiescseq.buf[i] & 0xff;
1849 if(isprint(c)) {
1850 putchar(c);
1851 } else if(c == '\n') {
1852 printf("(\\n)");
1853 } else if(c == '\r') {
1854 printf("(\\r)");
1855 } else if(c == 0x1b) {
1856 printf("(\\e)");
1857 } else {
1858 printf("(%02x)", c);
1859 }
1860 }
1861 putchar('\n');
1862 }
1863
1864 void
1865 csireset(void) {
1866 memset(&csiescseq, 0, sizeof(csiescseq));
1867 }
1868
1869 void
1870 strhandle(void) {
1871 char *p = NULL;
1872 int i, j, narg;
1873
1874 strparse();
1875 narg = strescseq.narg;
1876
1877 switch(strescseq.type) {
1878 case ']': /* OSC -- Operating System Command */
1879 switch(i = atoi(strescseq.args[0])) {
1880 case 0:
1881 case 1:
1882 case 2:
1883 if(narg > 1)
1884 xsettitle(strescseq.args[1]);
1885 break;
1886 case 4: /* color set */
1887 if(narg < 3)
1888 break;
1889 p = strescseq.args[2];
1890 /* fall through */
1891 case 104: /* color reset, here p = NULL */
1892 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
1893 if (!xsetcolorname(j, p)) {
1894 fprintf(stderr, "erresc: invalid color %s\n", p);
1895 } else {
1896 /*
1897 * TODO if defaultbg color is changed, borders
1898 * are dirty
1899 */
1900 redraw(0);
1901 }
1902 break;
1903 default:
1904 fprintf(stderr, "erresc: unknown str ");
1905 strdump();
1906 break;
1907 }
1908 break;
1909 case 'k': /* old title set compatibility */
1910 xsettitle(strescseq.args[0]);
1911 break;
1912 case 'P': /* DSC -- Device Control String */
1913 case '_': /* APC -- Application Program Command */
1914 case '^': /* PM -- Privacy Message */
1915 default:
1916 fprintf(stderr, "erresc: unknown str ");
1917 strdump();
1918 /* die(""); */
1919 break;
1920 }
1921 }
1922
1923 void
1924 strparse(void) {
1925 char *p = strescseq.buf;
1926
1927 strescseq.narg = 0;
1928 strescseq.buf[strescseq.len] = '\0';
1929 while(p && strescseq.narg < STR_ARG_SIZ)
1930 strescseq.args[strescseq.narg++] = strsep(&p, ";");
1931 }
1932
1933 void
1934 strdump(void) {
1935 int i;
1936 uint c;
1937
1938 printf("ESC%c", strescseq.type);
1939 for(i = 0; i < strescseq.len; i++) {
1940 c = strescseq.buf[i] & 0xff;
1941 if(c == '\0') {
1942 return;
1943 } else if(isprint(c)) {
1944 putchar(c);
1945 } else if(c == '\n') {
1946 printf("(\\n)");
1947 } else if(c == '\r') {
1948 printf("(\\r)");
1949 } else if(c == 0x1b) {
1950 printf("(\\e)");
1951 } else {
1952 printf("(%02x)", c);
1953 }
1954 }
1955 printf("ESC\\\n");
1956 }
1957
1958 void
1959 strreset(void) {
1960 memset(&strescseq, 0, sizeof(strescseq));
1961 }
1962
1963 void
1964 tputtab(bool forward) {
1965 uint x = term.c.x;
1966
1967 if(forward) {
1968 if(x == term.col)
1969 return;
1970 for(++x; x < term.col && !term.tabs[x]; ++x)
1971 /* nothing */ ;
1972 } else {
1973 if(x == 0)
1974 return;
1975 for(--x; x > 0 && !term.tabs[x]; --x)
1976 /* nothing */ ;
1977 }
1978 tmoveto(x, term.c.y);
1979 }
1980
1981 void
1982 techo(char *buf, int len) {
1983 for(; len > 0; buf++, len--) {
1984 char c = *buf;
1985
1986 if(c == '\033') { /* escape */
1987 tputc("^", 1);
1988 tputc("[", 1);
1989 } else if(c < '\x20') { /* control code */
1990 if(c != '\n' && c != '\r' && c != '\t') {
1991 c |= '\x40';
1992 tputc("^", 1);
1993 }
1994 tputc(&c, 1);
1995 } else {
1996 break;
1997 }
1998 }
1999 if(len)
2000 tputc(buf, len);
2001 }
2002
2003 void
2004 tputc(char *c, int len) {
2005 uchar ascii = *c;
2006 bool control = ascii < '\x20' || ascii == 0177;
2007
2008 if(iofd != -1) {
2009 if(xwrite(iofd, c, len) < 0) {
2010 fprintf(stderr, "Error writing in %s:%s\n",
2011 opt_io, strerror(errno));
2012 close(iofd);
2013 iofd = -1;
2014 }
2015 }
2016
2017 /*
2018 * STR sequences must be checked before anything else
2019 * because it can use some control codes as part of the sequence.
2020 */
2021 if(term.esc & ESC_STR) {
2022 switch(ascii) {
2023 case '\033':
2024 term.esc = ESC_START | ESC_STR_END;
2025 break;
2026 case '\a': /* backwards compatibility to xterm */
2027 term.esc = 0;
2028 strhandle();
2029 break;
2030 default:
2031 if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2032 memmove(&strescseq.buf[strescseq.len], c, len);
2033 strescseq.len += len;
2034 } else {
2035 /*
2036 * Here is a bug in terminals. If the user never sends
2037 * some code to stop the str or esc command, then st
2038 * will stop responding. But this is better than
2039 * silently failing with unknown characters. At least
2040 * then users will report back.
2041 *
2042 * In the case users ever get fixed, here is the code:
2043 */
2044 /*
2045 * term.esc = 0;
2046 * strhandle();
2047 */
2048 }
2049 }
2050 return;
2051 }
2052
2053 /*
2054 * Actions of control codes must be performed as soon they arrive
2055 * because they can be embedded inside a control sequence, and
2056 * they must not cause conflicts with sequences.
2057 */
2058 if(control) {
2059 switch(ascii) {
2060 case '\t': /* HT */
2061 tputtab(1);
2062 return;
2063 case '\b': /* BS */
2064 tmoveto(term.c.x-1, term.c.y);
2065 return;
2066 case '\r': /* CR */
2067 tmoveto(0, term.c.y);
2068 return;
2069 case '\f': /* LF */
2070 case '\v': /* VT */
2071 case '\n': /* LF */
2072 /* go to first col if the mode is set */
2073 tnewline(IS_SET(MODE_CRLF));
2074 return;
2075 case '\a': /* BEL */
2076 if(!(xw.state & WIN_FOCUSED))
2077 xseturgency(1);
2078 return;
2079 case '\033': /* ESC */
2080 csireset();
2081 term.esc = ESC_START;
2082 return;
2083 case '\016': /* SO */
2084 case '\017': /* SI */
2085 /*
2086 * Different charsets are hard to handle. Applications
2087 * should use the right alt charset escapes for the
2088 * only reason they still exist: line drawing. The
2089 * rest is incompatible history st should not support.
2090 */
2091 return;
2092 case '\032': /* SUB */
2093 case '\030': /* CAN */
2094 csireset();
2095 return;
2096 case '\005': /* ENQ (IGNORED) */
2097 case '\000': /* NUL (IGNORED) */
2098 case '\021': /* XON (IGNORED) */
2099 case '\023': /* XOFF (IGNORED) */
2100 case 0177: /* DEL (IGNORED) */
2101 return;
2102 }
2103 } else if(term.esc & ESC_START) {
2104 if(term.esc & ESC_CSI) {
2105 csiescseq.buf[csiescseq.len++] = ascii;
2106 if(BETWEEN(ascii, 0x40, 0x7E)
2107 || csiescseq.len >= \
2108 sizeof(csiescseq.buf)-1) {
2109 term.esc = 0;
2110 csiparse();
2111 csihandle();
2112 }
2113 } else if(term.esc & ESC_STR_END) {
2114 term.esc = 0;
2115 if(ascii == '\\')
2116 strhandle();
2117 } else if(term.esc & ESC_ALTCHARSET) {
2118 switch(ascii) {
2119 case '0': /* Line drawing set */
2120 term.c.attr.mode |= ATTR_GFX;
2121 break;
2122 case 'B': /* USASCII */
2123 term.c.attr.mode &= ~ATTR_GFX;
2124 break;
2125 case 'A': /* UK (IGNORED) */
2126 case '<': /* multinational charset (IGNORED) */
2127 case '5': /* Finnish (IGNORED) */
2128 case 'C': /* Finnish (IGNORED) */
2129 case 'K': /* German (IGNORED) */
2130 break;
2131 default:
2132 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2133 }
2134 term.esc = 0;
2135 } else if(term.esc & ESC_TEST) {
2136 if(ascii == '8') { /* DEC screen alignment test. */
2137 char E[UTF_SIZ] = "E";
2138 int x, y;
2139
2140 for(x = 0; x < term.col; ++x) {
2141 for(y = 0; y < term.row; ++y)
2142 tsetchar(E, &term.c.attr, x, y);
2143 }
2144 }
2145 term.esc = 0;
2146 } else {
2147 switch(ascii) {
2148 case '[':
2149 term.esc |= ESC_CSI;
2150 break;
2151 case '#':
2152 term.esc |= ESC_TEST;
2153 break;
2154 case 'P': /* DCS -- Device Control String */
2155 case '_': /* APC -- Application Program Command */
2156 case '^': /* PM -- Privacy Message */
2157 case ']': /* OSC -- Operating System Command */
2158 case 'k': /* old title set compatibility */
2159 strreset();
2160 strescseq.type = ascii;
2161 term.esc |= ESC_STR;
2162 break;
2163 case '(': /* set primary charset G0 */
2164 term.esc |= ESC_ALTCHARSET;
2165 break;
2166 case ')': /* set secondary charset G1 (IGNORED) */
2167 case '*': /* set tertiary charset G2 (IGNORED) */
2168 case '+': /* set quaternary charset G3 (IGNORED) */
2169 term.esc = 0;
2170 break;
2171 case 'D': /* IND -- Linefeed */
2172 if(term.c.y == term.bot) {
2173 tscrollup(term.top, 1);
2174 } else {
2175 tmoveto(term.c.x, term.c.y+1);
2176 }
2177 term.esc = 0;
2178 break;
2179 case 'E': /* NEL -- Next line */
2180 tnewline(1); /* always go to first col */
2181 term.esc = 0;
2182 break;
2183 case 'H': /* HTS -- Horizontal tab stop */
2184 term.tabs[term.c.x] = 1;
2185 term.esc = 0;
2186 break;
2187 case 'M': /* RI -- Reverse index */
2188 if(term.c.y == term.top) {
2189 tscrolldown(term.top, 1);
2190 } else {
2191 tmoveto(term.c.x, term.c.y-1);
2192 }
2193 term.esc = 0;
2194 break;
2195 case 'Z': /* DECID -- Identify Terminal */
2196 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2197 term.esc = 0;
2198 break;
2199 case 'c': /* RIS -- Reset to inital state */
2200 treset();
2201 term.esc = 0;
2202 xresettitle();
2203 break;
2204 case '=': /* DECPAM -- Application keypad */
2205 term.mode |= MODE_APPKEYPAD;
2206 term.esc = 0;
2207 break;
2208 case '>': /* DECPNM -- Normal keypad */
2209 term.mode &= ~MODE_APPKEYPAD;
2210 term.esc = 0;
2211 break;
2212 case '7': /* DECSC -- Save Cursor */
2213 tcursor(CURSOR_SAVE);
2214 term.esc = 0;
2215 break;
2216 case '8': /* DECRC -- Restore Cursor */
2217 tcursor(CURSOR_LOAD);
2218 term.esc = 0;
2219 break;
2220 case '\\': /* ST -- Stop */
2221 term.esc = 0;
2222 break;
2223 default:
2224 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2225 (uchar) ascii, isprint(ascii)? ascii:'.');
2226 term.esc = 0;
2227 }
2228 }
2229 /*
2230 * All characters which form part of a sequence are not
2231 * printed
2232 */
2233 return;
2234 }
2235 /*
2236 * Display control codes only if we are in graphic mode
2237 */
2238 if(control && !(term.c.attr.mode & ATTR_GFX))
2239 return;
2240 if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
2241 sel.bx = -1;
2242 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
2243 tnewline(1); /* always go to first col */
2244
2245 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col) {
2246 memmove(&term.line[term.c.y][term.c.x+1],
2247 &term.line[term.c.y][term.c.x],
2248 (term.col - term.c.x - 1) * sizeof(Glyph));
2249 }
2250
2251 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2252 if(term.c.x+1 < term.col) {
2253 tmoveto(term.c.x+1, term.c.y);
2254 } else {
2255 term.c.state |= CURSOR_WRAPNEXT;
2256 }
2257 }
2258
2259 int
2260 tresize(int col, int row) {
2261 int i, x;
2262 int minrow = MIN(row, term.row);
2263 int mincol = MIN(col, term.col);
2264 int slide = term.c.y - row + 1;
2265 bool *bp;
2266
2267 if(col < 1 || row < 1)
2268 return 0;
2269
2270 /* free unneeded rows */
2271 i = 0;
2272 if(slide > 0) {
2273 /*
2274 * slide screen to keep cursor where we expect it -
2275 * tscrollup would work here, but we can optimize to
2276 * memmove because we're freeing the earlier lines
2277 */
2278 for(/* i = 0 */; i < slide; i++) {
2279 free(term.line[i]);
2280 free(term.alt[i]);
2281 }
2282 memmove(term.line, term.line + slide, row * sizeof(Line));
2283 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2284 }
2285 for(i += row; i < term.row; i++) {
2286 free(term.line[i]);
2287 free(term.alt[i]);
2288 }
2289
2290 /* resize to new height */
2291 term.line = xrealloc(term.line, row * sizeof(Line));
2292 term.alt = xrealloc(term.alt, row * sizeof(Line));
2293 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2294 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2295
2296 /* resize each row to new width, zero-pad if needed */
2297 for(i = 0; i < minrow; i++) {
2298 term.dirty[i] = 1;
2299 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2300 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2301 for(x = mincol; x < col; x++) {
2302 term.line[i][x].state = 0;
2303 term.alt[i][x].state = 0;
2304 }
2305 }
2306
2307 /* allocate any new rows */
2308 for(/* i == minrow */; i < row; i++) {
2309 term.dirty[i] = 1;
2310 term.line[i] = xcalloc(col, sizeof(Glyph));
2311 term.alt [i] = xcalloc(col, sizeof(Glyph));
2312 }
2313 if(col > term.col) {
2314 bp = term.tabs + term.col;
2315
2316 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2317 while(--bp > term.tabs && !*bp)
2318 /* nothing */ ;
2319 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2320 *bp = 1;
2321 }
2322 /* update terminal size */
2323 term.col = col;
2324 term.row = row;
2325 /* reset scrolling region */
2326 tsetscroll(0, row-1);
2327 /* make use of the LIMIT in tmoveto */
2328 tmoveto(term.c.x, term.c.y);
2329
2330 return (slide > 0);
2331 }
2332
2333 void
2334 xresize(int col, int row) {
2335 xw.tw = MAX(1, col * xw.cw);
2336 xw.th = MAX(1, row * xw.ch);
2337
2338 XFreePixmap(xw.dpy, xw.buf);
2339 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2340 DefaultDepth(xw.dpy, xw.scr));
2341 XSetForeground(xw.dpy, dc.gc, dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg].pixel);
2342 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
2343
2344 XftDrawChange(xw.draw, xw.buf);
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 = &dc.col[base.fg], *bg = &dc.col[base.bg],
2720 *temp, revfg, revbg;
2721 XRenderColor colfg, colbg;
2722
2723 frcflags = FRC_NORMAL;
2724
2725 if(base.mode & ATTR_BOLD) {
2726 if(BETWEEN(base.fg, 0, 7)) {
2727 /* basic system colors */
2728 fg = &dc.col[base.fg + 8];
2729 } else if(BETWEEN(base.fg, 16, 195)) {
2730 /* 256 colors */
2731 fg = &dc.col[base.fg + 36];
2732 } else if(BETWEEN(base.fg, 232, 251)) {
2733 /* greyscale */
2734 fg = &dc.col[base.fg + 4];
2735 }
2736 /*
2737 * Those ranges will not be brightened:
2738 * 8 - 15 – bright system colors
2739 * 196 - 231 – highest 256 color cube
2740 * 252 - 255 – brightest colors in greyscale
2741 */
2742 font = &dc.bfont;
2743 frcflags = FRC_BOLD;
2744 }
2745
2746 if(base.mode & ATTR_ITALIC) {
2747 font = &dc.ifont;
2748 frcflags = FRC_ITALIC;
2749 }
2750 if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
2751 font = &dc.ibfont;
2752 frcflags = FRC_ITALICBOLD;
2753 }
2754
2755 if(IS_SET(MODE_REVERSE)) {
2756 if(fg == &dc.col[defaultfg]) {
2757 fg = &dc.col[defaultbg];
2758 } else {
2759 colfg.red = ~fg->color.red;
2760 colfg.green = ~fg->color.green;
2761 colfg.blue = ~fg->color.blue;
2762 colfg.alpha = fg->color.alpha;
2763 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
2764 fg = &revfg;
2765 }
2766
2767 if(bg == &dc.col[defaultbg]) {
2768 bg = &dc.col[defaultfg];
2769 } else {
2770 colbg.red = ~bg->color.red;
2771 colbg.green = ~bg->color.green;
2772 colbg.blue = ~bg->color.blue;
2773 colbg.alpha = bg->color.alpha;
2774 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &revbg);
2775 bg = &revbg;
2776 }
2777 }
2778
2779 if(base.mode & ATTR_REVERSE) {
2780 temp = fg;
2781 fg = bg;
2782 bg = temp;
2783 }
2784
2785 /* Intelligent cleaning up of the borders. */
2786 if(x == 0) {
2787 xclear(0, (y == 0)? 0 : winy, borderpx,
2788 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
2789 }
2790 if(x + charlen >= term.col) {
2791 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
2792 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
2793 }
2794 if(y == 0)
2795 xclear(winx, 0, winx + width, borderpx);
2796 if(y == term.row-1)
2797 xclear(winx, winy + xw.ch, winx + width, xw.h);
2798
2799 /* Clean up the region we want to draw to. */
2800 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
2801
2802 fcsets[0] = font->set;
2803 for(xp = winx; bytelen > 0;) {
2804 /*
2805 * Search for the range in the to be printed string of glyphs
2806 * that are in the main font. Then print that range. If
2807 * some glyph is found that is not in the font, do the
2808 * fallback dance.
2809 */
2810 u8fs = s;
2811 u8fblen = 0;
2812 u8fl = 0;
2813 for(;;) {
2814 u8c = s;
2815 u8cblen = utf8decode(s, &u8char);
2816 s += u8cblen;
2817 bytelen -= u8cblen;
2818
2819 doesexist = XftCharIndex(xw.dpy, font->match, u8char);
2820 if(!doesexist || bytelen <= 0) {
2821 if(bytelen <= 0) {
2822 if(doesexist) {
2823 u8fl++;
2824 u8fblen += u8cblen;
2825 }
2826 }
2827
2828 if(u8fl > 0) {
2829 XftDrawStringUtf8(xw.draw, fg,
2830 font->match, xp,
2831 winy + font->ascent,
2832 (FcChar8 *)u8fs,
2833 u8fblen);
2834 xp += font->width * u8fl;
2835 }
2836 break;
2837 }
2838
2839 u8fl++;
2840 u8fblen += u8cblen;
2841 }
2842 if(doesexist)
2843 break;
2844
2845 frp = frccur;
2846 /* Search the font cache. */
2847 for(i = 0; i < frclen; i++, frp--) {
2848 if(frp <= 0)
2849 frp = LEN(frc) - 1;
2850
2851 if(frc[frp].c == u8char
2852 && frc[frp].flags == frcflags) {
2853 break;
2854 }
2855 }
2856
2857 /* Nothing was found. */
2858 if(i >= frclen) {
2859 /*
2860 * Nothing was found in the cache. Now use
2861 * some dozen of Fontconfig calls to get the
2862 * font for one single character.
2863 */
2864 fcpattern = FcPatternDuplicate(font->pattern);
2865 fccharset = FcCharSetCreate();
2866
2867 FcCharSetAddChar(fccharset, u8char);
2868 FcPatternAddCharSet(fcpattern, FC_CHARSET,
2869 fccharset);
2870 FcPatternAddBool(fcpattern, FC_SCALABLE,
2871 FcTrue);
2872
2873 FcConfigSubstitute(0, fcpattern,
2874 FcMatchPattern);
2875 FcDefaultSubstitute(fcpattern);
2876
2877 fontpattern = FcFontSetMatch(0, fcsets,
2878 FcTrue, fcpattern, &fcres);
2879
2880 /*
2881 * Overwrite or create the new cache entry
2882 * entry.
2883 */
2884 frccur++;
2885 frclen++;
2886 if(frccur >= LEN(frc))
2887 frccur = 0;
2888 if(frclen > LEN(frc)) {
2889 frclen = LEN(frc);
2890 XftFontClose(xw.dpy, frc[frccur].font);
2891 }
2892
2893 frc[frccur].font = XftFontOpenPattern(xw.dpy,
2894 fontpattern);
2895 frc[frccur].c = u8char;
2896 frc[frccur].flags = frcflags;
2897
2898 FcPatternDestroy(fcpattern);
2899 FcCharSetDestroy(fccharset);
2900
2901 frp = frccur;
2902 }
2903
2904 XftDrawStringUtf8(xw.draw, fg, frc[frp].font,
2905 xp, winy + frc[frp].font->ascent,
2906 (FcChar8 *)u8c, u8cblen);
2907
2908 xp += font->width;
2909 }
2910
2911 /*
2912 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
2913 winy + font->ascent, (FcChar8 *)s, bytelen);
2914 */
2915
2916 if(base.mode & ATTR_UNDERLINE) {
2917 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
2918 width, 1);
2919 }
2920 }
2921
2922 void
2923 xdrawcursor(void) {
2924 static int oldx = 0, oldy = 0;
2925 int sl;
2926 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs, 0};
2927
2928 LIMIT(oldx, 0, term.col-1);
2929 LIMIT(oldy, 0, term.row-1);
2930
2931 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
2932 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
2933
2934 /* remove the old cursor */
2935 if(term.line[oldy][oldx].state & GLYPH_SET) {
2936 sl = utf8size(term.line[oldy][oldx].c);
2937 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
2938 oldy, 1, sl);
2939 } else {
2940 xtermclear(oldx, oldy, oldx, oldy);
2941 }
2942
2943 /* draw the new one */
2944 if(!(IS_SET(MODE_HIDE))) {
2945 if(!(xw.state & WIN_FOCUSED))
2946 g.bg = defaultucs;
2947
2948 if(IS_SET(MODE_REVERSE))
2949 g.mode |= ATTR_REVERSE, g.fg = defaultcs, g.bg = defaultfg;
2950
2951 sl = utf8size(g.c);
2952 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
2953 oldx = term.c.x, oldy = term.c.y;
2954 }
2955 }
2956
2957
2958 void
2959 xsettitle(char *p) {
2960 XTextProperty prop;
2961
2962 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
2963 &prop);
2964 XSetWMName(xw.dpy, xw.win, &prop);
2965 }
2966
2967 void
2968 xresettitle(void) {
2969 xsettitle(opt_title ? opt_title : "st");
2970 }
2971
2972 void
2973 redraw(int timeout) {
2974 struct timespec tv = {0, timeout * 1000};
2975
2976 tfulldirt();
2977 draw();
2978
2979 if(timeout > 0) {
2980 nanosleep(&tv, NULL);
2981 XSync(xw.dpy, False); /* necessary for a good tput flash */
2982 }
2983 }
2984
2985 void
2986 draw(void) {
2987 drawregion(0, 0, term.col, term.row);
2988 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
2989 xw.h, 0, 0);
2990 XSetForeground(xw.dpy, dc.gc,
2991 dc.col[IS_SET(MODE_REVERSE)?
2992 defaultfg : defaultbg].pixel);
2993 }
2994
2995 void
2996 drawregion(int x1, int y1, int x2, int y2) {
2997 int ic, ib, x, y, ox, sl;
2998 Glyph base, new;
2999 char buf[DRAW_BUF_SIZ];
3000 bool ena_sel = sel.bx != -1;
3001
3002 if(sel.alt ^ IS_SET(MODE_ALTSCREEN))
3003 ena_sel = 0;
3004
3005 if(!(xw.state & WIN_VISIBLE))
3006 return;
3007
3008 for(y = y1; y < y2; y++) {
3009 if(!term.dirty[y])
3010 continue;
3011
3012 xtermclear(0, y, term.col, y);
3013 term.dirty[y] = 0;
3014 base = term.line[y][0];
3015 ic = ib = ox = 0;
3016 for(x = x1; x < x2; x++) {
3017 new = term.line[y][x];
3018 if(ena_sel && *(new.c) && selected(x, y))
3019 new.mode ^= ATTR_REVERSE;
3020 if(ib > 0 && (!(new.state & GLYPH_SET)
3021 || ATTRCMP(base, new)
3022 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3023 xdraws(buf, base, ox, y, ic, ib);
3024 ic = ib = 0;
3025 }
3026 if(new.state & GLYPH_SET) {
3027 if(ib == 0) {
3028 ox = x;
3029 base = new;
3030 }
3031
3032 sl = utf8size(new.c);
3033 memcpy(buf+ib, new.c, sl);
3034 ib += sl;
3035 ++ic;
3036 }
3037 }
3038 if(ib > 0)
3039 xdraws(buf, base, ox, y, ic, ib);
3040 }
3041 xdrawcursor();
3042 }
3043
3044 void
3045 expose(XEvent *ev) {
3046 XExposeEvent *e = &ev->xexpose;
3047
3048 if(xw.state & WIN_REDRAW) {
3049 if(!e->count)
3050 xw.state &= ~WIN_REDRAW;
3051 }
3052 redraw(0);
3053 }
3054
3055 void
3056 visibility(XEvent *ev) {
3057 XVisibilityEvent *e = &ev->xvisibility;
3058
3059 if(e->state == VisibilityFullyObscured) {
3060 xw.state &= ~WIN_VISIBLE;
3061 } else if(!(xw.state & WIN_VISIBLE)) {
3062 /* need a full redraw for next Expose, not just a buf copy */
3063 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3064 }
3065 }
3066
3067 void
3068 unmap(XEvent *ev) {
3069 xw.state &= ~WIN_VISIBLE;
3070 }
3071
3072 void
3073 xseturgency(int add) {
3074 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3075
3076 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
3077 XSetWMHints(xw.dpy, xw.win, h);
3078 XFree(h);
3079 }
3080
3081 void
3082 focus(XEvent *ev) {
3083 XFocusChangeEvent *e = &ev->xfocus;
3084
3085 if(e->mode == NotifyGrab)
3086 return;
3087
3088 if(ev->type == FocusIn) {
3089 XSetICFocus(xw.xic);
3090 xw.state |= WIN_FOCUSED;
3091 xseturgency(0);
3092 } else {
3093 XUnsetICFocus(xw.xic);
3094 xw.state &= ~WIN_FOCUSED;
3095 }
3096 }
3097
3098 inline bool
3099 match(uint mask, uint state) {
3100 state &= ~(ignoremod);
3101
3102 if(mask == XK_NO_MOD && state)
3103 return false;
3104 if(mask != XK_ANY_MOD && mask != XK_NO_MOD && !state)
3105 return false;
3106 if((state & mask) != state)
3107 return false;
3108 return true;
3109 }
3110
3111 void
3112 numlock(const Arg *dummy) {
3113 term.numlock ^= 1;
3114 }
3115
3116 char*
3117 kmap(KeySym k, uint state) {
3118 uint mask;
3119 Key *kp;
3120 int i;
3121
3122 /* Check for mapped keys out of X11 function keys. */
3123 for(i = 0; i < LEN(mappedkeys); i++) {
3124 if(mappedkeys[i] == k)
3125 break;
3126 }
3127 if(i == LEN(mappedkeys)) {
3128 if((k & 0xFFFF) < 0xFD00)
3129 return NULL;
3130 }
3131
3132 for(kp = key; kp < key + LEN(key); kp++) {
3133 mask = kp->mask;
3134
3135 if(kp->k != k)
3136 continue;
3137
3138 if(!match(mask, state))
3139 continue;
3140
3141 if(kp->appkey > 0) {
3142 if(!IS_SET(MODE_APPKEYPAD))
3143 continue;
3144 if(term.numlock && kp->appkey == 2)
3145 continue;
3146 } else if(kp->appkey < 0 && IS_SET(MODE_APPKEYPAD)) {
3147 continue;
3148 }
3149
3150 if((kp->appcursor < 0 && IS_SET(MODE_APPCURSOR)) ||
3151 (kp->appcursor > 0
3152 && !IS_SET(MODE_APPCURSOR))) {
3153 continue;
3154 }
3155
3156 if((kp->crlf < 0 && IS_SET(MODE_CRLF)) ||
3157 (kp->crlf > 0 && !IS_SET(MODE_CRLF))) {
3158 continue;
3159 }
3160
3161 return kp->s;
3162 }
3163
3164 return NULL;
3165 }
3166
3167 void
3168 kpress(XEvent *ev) {
3169 XKeyEvent *e = &ev->xkey;
3170 KeySym ksym;
3171 char xstr[31], buf[32], *customkey, *cp = buf;
3172 int len;
3173 Status status;
3174 Shortcut *bp;
3175
3176 if(IS_SET(MODE_KBDLOCK))
3177 return;
3178
3179 len = XmbLookupString(xw.xic, e, xstr, sizeof(xstr), &ksym, &status);
3180 e->state &= ~Mod2Mask;
3181 /* 1. shortcuts */
3182 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3183 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3184 bp->func(&(bp->arg));
3185 return;
3186 }
3187 }
3188
3189 /* 2. custom keys from config.h */
3190 if((customkey = kmap(ksym, e->state))) {
3191 len = strlen(customkey);
3192 memcpy(buf, customkey, len);
3193 /* 2. hardcoded (overrides X lookup) */
3194 } else {
3195 if(len == 0)
3196 return;
3197
3198 if(len == 1 && e->state & Mod1Mask)
3199 *cp++ = '\033';
3200
3201 memcpy(cp, xstr, len);
3202 len = cp - buf + len;
3203 }
3204
3205 ttywrite(buf, len);
3206 if(IS_SET(MODE_ECHO))
3207 techo(buf, len);
3208 }
3209
3210
3211 void
3212 cmessage(XEvent *e) {
3213 /*
3214 * See xembed specs
3215 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3216 */
3217 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3218 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3219 xw.state |= WIN_FOCUSED;
3220 xseturgency(0);
3221 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3222 xw.state &= ~WIN_FOCUSED;
3223 }
3224 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3225 /* Send SIGHUP to shell */
3226 kill(pid, SIGHUP);
3227 exit(EXIT_SUCCESS);
3228 }
3229 }
3230
3231 void
3232 cresize(int width, int height) {
3233 int col, row;
3234
3235 if(width != 0)
3236 xw.w = width;
3237 if(height != 0)
3238 xw.h = height;
3239
3240 col = (xw.w - 2 * borderpx) / xw.cw;
3241 row = (xw.h - 2 * borderpx) / xw.ch;
3242
3243 tresize(col, row);
3244 xresize(col, row);
3245 ttyresize();
3246 }
3247
3248 void
3249 resize(XEvent *e) {
3250 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3251 return;
3252
3253 cresize(e->xconfigure.width, e->xconfigure.height);
3254 }
3255
3256 void
3257 run(void) {
3258 XEvent ev;
3259 fd_set rfd;
3260 int xfd = XConnectionNumber(xw.dpy), xev;
3261 struct timeval drawtimeout, *tv = NULL, now, last;
3262
3263 gettimeofday(&last, NULL);
3264
3265 for(xev = actionfps;;) {
3266 FD_ZERO(&rfd);
3267 FD_SET(cmdfd, &rfd);
3268 FD_SET(xfd, &rfd);
3269 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
3270 if(errno == EINTR)
3271 continue;
3272 die("select failed: %s\n", SERRNO);
3273 }
3274
3275 gettimeofday(&now, NULL);
3276 drawtimeout.tv_sec = 0;
3277 drawtimeout.tv_usec = (1000/xfps) * 1000;
3278 tv = &drawtimeout;
3279
3280 if(FD_ISSET(cmdfd, &rfd))
3281 ttyread();
3282
3283 if(FD_ISSET(xfd, &rfd))
3284 xev = actionfps;
3285
3286 if(TIMEDIFF(now, last) > \
3287 (xev ? (1000/xfps) : (1000/actionfps))) {
3288 while(XPending(xw.dpy)) {
3289 XNextEvent(xw.dpy, &ev);
3290 if(XFilterEvent(&ev, None))
3291 continue;
3292 if(handler[ev.type])
3293 (handler[ev.type])(&ev);
3294 }
3295
3296 draw();
3297 XFlush(xw.dpy);
3298 last = now;
3299
3300 if(xev && !FD_ISSET(xfd, &rfd))
3301 xev--;
3302 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd))
3303 tv = NULL;
3304 }
3305 }
3306 }
3307
3308 int
3309 main(int argc, char *argv[]) {
3310 int i, bitm, xr, yr;
3311 uint wr, hr;
3312
3313 xw.fw = xw.fh = xw.fx = xw.fy = 0;
3314 xw.isfixed = False;
3315
3316 for(i = 1; i < argc; i++) {
3317 switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
3318 case 'c':
3319 if(++i < argc)
3320 opt_class = argv[i];
3321 break;
3322 case 'e':
3323 /* eat all remaining arguments */
3324 if(++i < argc)
3325 opt_cmd = &argv[i];
3326 goto run;
3327 case 'f':
3328 if(++i < argc)
3329 opt_font = argv[i];
3330 break;
3331 case 'g':
3332 if(++i >= argc)
3333 break;
3334
3335 bitm = XParseGeometry(argv[i], &xr, &yr, &wr, &hr);
3336 if(bitm & XValue)
3337 xw.fx = xr;
3338 if(bitm & YValue)
3339 xw.fy = yr;
3340 if(bitm & WidthValue)
3341 xw.fw = (int)wr;
3342 if(bitm & HeightValue)
3343 xw.fh = (int)hr;
3344 if(bitm & XNegative && xw.fx == 0)
3345 xw.fx = -1;
3346 if(bitm & XNegative && xw.fy == 0)
3347 xw.fy = -1;
3348
3349 if(xw.fh != 0 && xw.fw != 0)
3350 xw.isfixed = True;
3351 break;
3352 case 'o':
3353 if(++i < argc)
3354 opt_io = argv[i];
3355 break;
3356 case 't':
3357 if(++i < argc)
3358 opt_title = argv[i];
3359 break;
3360 case 'v':
3361 default:
3362 die(USAGE);
3363 case 'w':
3364 if(++i < argc)
3365 opt_embed = argv[i];
3366 break;
3367 }
3368 }
3369
3370 run:
3371 setlocale(LC_CTYPE, "");
3372 XSetLocaleModifiers("");
3373 tnew(80, 24);
3374 xinit();
3375 ttynew();
3376 selinit();
3377 run();
3378
3379 return 0;
3380 }
3381