Xinqi Bao's Git

projects / st.git / blob
summary | log | commit | diff | tree
history | raw | HEAD
Removing the overdrawing of some fonts.
[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 #define Rectangle XRectangle
40
41 #if defined(__linux)
42 #include <pty.h>
43 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
44 #include <util.h>
45 #elif defined(__FreeBSD__) || defined(__DragonFly__)
46 #include <libutil.h>
47 #endif
48
49
50 /* XEMBED messages */
51 #define XEMBED_FOCUS_IN 4
52 #define XEMBED_FOCUS_OUT 5
53
54 /* Arbitrary sizes */
55 #define UTF_SIZ 4
56 #define ESC_BUF_SIZ (128*UTF_SIZ)
57 #define ESC_ARG_SIZ 16
58 #define STR_BUF_SIZ ESC_BUF_SIZ
59 #define STR_ARG_SIZ ESC_ARG_SIZ
60 #define DRAW_BUF_SIZ 20*1024
61 #define XK_ANY_MOD UINT_MAX
62 #define XK_NO_MOD 0
63 #define XK_SWITCH_MOD (1<<13)
64
65 #define REDRAW_TIMEOUT (80*1000) /* 80 ms */
66
67 /* macros */
68 #define SERRNO strerror(errno)
69 #define MIN(a, b) ((a) < (b) ? (a) : (b))
70 #define MAX(a, b) ((a) < (b) ? (b) : (a))
71 #define LEN(a) (sizeof(a) / sizeof(a[0]))
72 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
73 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
74 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
75 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
76 #define IS_SET(flag) ((term.mode & (flag)) != 0)
77 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_usec-t2.tv_usec)/1000)
78
79 #define VT102ID "\033[?6c"
80
81 enum glyph_attribute {
82 ATTR_NULL = 0,
83 ATTR_REVERSE = 1,
84 ATTR_UNDERLINE = 2,
85 ATTR_BOLD = 4,
86 ATTR_GFX = 8,
87 ATTR_ITALIC = 16,
88 ATTR_BLINK = 32,
89 ATTR_WRAP = 64,
90 };
91
92 enum cursor_movement {
93 CURSOR_SAVE,
94 CURSOR_LOAD
95 };
96
97 enum cursor_state {
98 CURSOR_DEFAULT = 0,
99 CURSOR_WRAPNEXT = 1,
100 CURSOR_ORIGIN = 2
101 };
102
103 enum term_mode {
104 MODE_WRAP = 1,
105 MODE_INSERT = 2,
106 MODE_APPKEYPAD = 4,
107 MODE_ALTSCREEN = 8,
108 MODE_CRLF = 16,
109 MODE_MOUSEBTN = 32,
110 MODE_MOUSEMOTION = 64,
111 MODE_MOUSE = 32|64,
112 MODE_REVERSE = 128,
113 MODE_KBDLOCK = 256,
114 MODE_HIDE = 512,
115 MODE_ECHO = 1024,
116 MODE_APPCURSOR = 2048,
117 MODE_MOUSESGR = 4096,
118 MODE_8BIT = 8192,
119 };
120
121 enum escape_state {
122 ESC_START = 1,
123 ESC_CSI = 2,
124 ESC_STR = 4, /* DSC, OSC, PM, APC */
125 ESC_ALTCHARSET = 8,
126 ESC_STR_END = 16, /* a final string was encountered */
127 ESC_TEST = 32, /* Enter in test mode */
128 };
129
130 enum window_state {
131 WIN_VISIBLE = 1,
132 WIN_REDRAW = 2,
133 WIN_FOCUSED = 4
134 };
135
136 enum selection_type {
137 SEL_REGULAR = 1,
138 SEL_RECTANGULAR = 2
139 };
140
141 enum selection_snap {
142 SNAP_WORD = 1,
143 SNAP_LINE = 2
144 };
145
146 /* bit macro */
147 #undef B0
148 enum { B0=1, B1=2, B2=4, B3=8, B4=16, B5=32, B6=64, B7=128 };
149
150 typedef unsigned char uchar;
151 typedef unsigned int uint;
152 typedef unsigned long ulong;
153 typedef unsigned short ushort;
154
155 typedef struct {
156 char c[UTF_SIZ]; /* character code */
157 uchar mode; /* attribute flags */
158 ushort fg; /* foreground */
159 ushort bg; /* background */
160 } Glyph;
161
162 typedef Glyph *Line;
163
164 typedef struct {
165 Glyph attr; /* current char attributes */
166 int x;
167 int y;
168 char state;
169 } TCursor;
170
171 /* CSI Escape sequence structs */
172 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
173 typedef struct {
174 char buf[ESC_BUF_SIZ]; /* raw string */
175 int len; /* raw string length */
176 char priv;
177 int arg[ESC_ARG_SIZ];
178 int narg; /* nb of args */
179 char mode;
180 } CSIEscape;
181
182 /* STR Escape sequence structs */
183 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
184 typedef struct {
185 char type; /* ESC type ... */
186 char buf[STR_BUF_SIZ]; /* raw string */
187 int len; /* raw string length */
188 char *args[STR_ARG_SIZ];
189 int narg; /* nb of args */
190 } STREscape;
191
192 /* Internal representation of the screen */
193 typedef struct {
194 int row; /* nb row */
195 int col; /* nb col */
196 Line *line; /* screen */
197 Line *alt; /* alternate screen */
198 bool *dirty; /* dirtyness of lines */
199 TCursor c; /* cursor */
200 int top; /* top scroll limit */
201 int bot; /* bottom scroll limit */
202 int mode; /* terminal mode flags */
203 int esc; /* escape state flags */
204 bool numlock; /* lock numbers in keyboard */
205 bool *tabs;
206 } Term;
207
208 /* Purely graphic info */
209 typedef struct {
210 Display *dpy;
211 Colourmap cmap;
212 Window win;
213 Drawable buf;
214 Atom xembed, wmdeletewin;
215 XIM xim;
216 XIC xic;
217 Draw draw;
218 Visual *vis;
219 int scr;
220 bool isfixed; /* is fixed geometry? */
221 int fx, fy, fw, fh; /* fixed geometry */
222 int tw, th; /* tty width and height */
223 int w, h; /* window width and height */
224 int ch; /* char height */
225 int cw; /* char width */
226 char state; /* focus, redraw, visible */
227 } XWindow;
228
229 typedef struct {
230 KeySym k;
231 uint mask;
232 char s[ESC_BUF_SIZ];
233 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
234 signed char appkey; /* application keypad */
235 signed char appcursor; /* application cursor */
236 signed char crlf; /* crlf mode */
237 } Key;
238
239 /* TODO: use better name for vars... */
240 typedef struct {
241 int mode;
242 int type;
243 int snap;
244 int bx, by;
245 int ex, ey;
246 struct {
247 int x, y;
248 } b, e;
249 char *clip;
250 Atom xtarget;
251 bool alt;
252 struct timeval tclick1;
253 struct timeval tclick2;
254 } Selection;
255
256 typedef union {
257 int i;
258 unsigned int ui;
259 float f;
260 const void *v;
261 } Arg;
262
263 typedef struct {
264 unsigned int mod;
265 KeySym keysym;
266 void (*func)(const Arg *);
267 const Arg arg;
268 } Shortcut;
269
270 /* function definitions used in config.h */
271 static void clippaste(const Arg *);
272 static void numlock(const Arg *);
273 static void selpaste(const Arg *);
274 static void xzoom(const Arg *);
275
276 /* Config.h for applying patches and the configuration. */
277 #include "config.h"
278
279 /* Font structure */
280 typedef struct {
281 int height;
282 int width;
283 int ascent;
284 int descent;
285 short lbearing;
286 short rbearing;
287 XftFont *match;
288 FcFontSet *set;
289 FcPattern *pattern;
290 } Font;
291
292 /* Drawing Context */
293 typedef struct {
294 Colour col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
295 Font font, bfont, ifont, ibfont;
296 GC gc;
297 } DC;
298
299 static void die(const char *, ...);
300 static void draw(void);
301 static void redraw(int);
302 static void drawregion(int, int, int, int);
303 static void execsh(void);
304 static void sigchld(int);
305 static void run(void);
306
307 static void csidump(void);
308 static void csihandle(void);
309 static void csiparse(void);
310 static void csireset(void);
311 static void strdump(void);
312 static void strhandle(void);
313 static void strparse(void);
314 static void strreset(void);
315
316 static void tclearregion(int, int, int, int);
317 static void tcursor(int);
318 static void tdeletechar(int);
319 static void tdeleteline(int);
320 static void tinsertblank(int);
321 static void tinsertblankline(int);
322 static void tmoveto(int, int);
323 static void tmoveato(int x, int y);
324 static void tnew(int, int);
325 static void tnewline(int);
326 static void tputtab(bool);
327 static void tputc(char *, int);
328 static void treset(void);
329 static int tresize(int, int);
330 static void tscrollup(int, int);
331 static void tscrolldown(int, int);
332 static void tsetattr(int*, int);
333 static void tsetchar(char *, Glyph *, int, int);
334 static void tsetscroll(int, int);
335 static void tswapscreen(void);
336 static void tsetdirt(int, int);
337 static void tsetmode(bool, bool, int *, int);
338 static void tfulldirt(void);
339 static void techo(char *, int);
340
341 static inline bool match(uint, uint);
342 static void ttynew(void);
343 static void ttyread(void);
344 static void ttyresize(void);
345 static void ttywrite(const char *, size_t);
346
347 static void xdraws(char *, Glyph, int, int, int, int);
348 static void xhints(void);
349 static void xclear(int, int, int, int);
350 static void xdrawcursor(void);
351 static void xinit(void);
352 static void xloadcols(void);
353 static int xsetcolorname(int, const char *);
354 static int xloadfont(Font *, FcPattern *);
355 static void xloadfonts(char *, int);
356 static void xsettitle(char *);
357 static void xresettitle(void);
358 static void xseturgency(int);
359 static void xsetsel(char*);
360 static void xtermclear(int, int, int, int);
361 static void xunloadfonts(void);
362 static void xresize(int, int);
363
364 static void expose(XEvent *);
365 static void visibility(XEvent *);
366 static void unmap(XEvent *);
367 static char *kmap(KeySym, uint);
368 static void kpress(XEvent *);
369 static void cmessage(XEvent *);
370 static void cresize(int, int);
371 static void resize(XEvent *);
372 static void focus(XEvent *);
373 static void brelease(XEvent *);
374 static void bpress(XEvent *);
375 static void bmotion(XEvent *);
376 static void selnotify(XEvent *);
377 static void selclear(XEvent *);
378 static void selrequest(XEvent *);
379
380 static void selinit(void);
381 static inline bool selected(int, int);
382 static void selcopy(void);
383 static void selscroll(int, int);
384 static void selsnap(int, int *, int *, int);
385
386 static int utf8decode(char *, long *);
387 static int utf8encode(long *, char *);
388 static int utf8size(char *);
389 static int isfullutf8(char *, int);
390
391 static ssize_t xwrite(int, char *, size_t);
392 static void *xmalloc(size_t);
393 static void *xrealloc(void *, size_t);
394 static void *xcalloc(size_t, size_t);
395
396 static void (*handler[LASTEvent])(XEvent *) = {
397 [KeyPress] = kpress,
398 [ClientMessage] = cmessage,
399 [ConfigureNotify] = resize,
400 [VisibilityNotify] = visibility,
401 [UnmapNotify] = unmap,
402 [Expose] = expose,
403 [FocusIn] = focus,
404 [FocusOut] = focus,
405 [MotionNotify] = bmotion,
406 [ButtonPress] = bpress,
407 [ButtonRelease] = brelease,
408 [SelectionClear] = selclear,
409 [SelectionNotify] = selnotify,
410 [SelectionRequest] = selrequest,
411 };
412
413 /* Globals */
414 static DC dc;
415 static XWindow xw;
416 static Term term;
417 static CSIEscape csiescseq;
418 static STREscape strescseq;
419 static int cmdfd;
420 static pid_t pid;
421 static Selection sel;
422 static int iofd = -1;
423 static char **opt_cmd = NULL;
424 static char *opt_io = NULL;
425 static char *opt_title = NULL;
426 static char *opt_embed = NULL;
427 static char *opt_class = NULL;
428 static char *opt_font = NULL;
429
430 static char *usedfont = NULL;
431 static int usedfontsize = 0;
432
433 /* Font Ring Cache */
434 enum {
435 FRC_NORMAL,
436 FRC_ITALIC,
437 FRC_BOLD,
438 FRC_ITALICBOLD
439 };
440
441 typedef struct {
442 XftFont *font;
443 long c;
444 int flags;
445 } Fontcache;
446
447 /*
448 * Fontcache is a ring buffer, with frccur as current position and frclen as
449 * the current length of used elements.
450 */
451
452 static Fontcache frc[1024];
453 static int frccur = -1, frclen = 0;
454
455 ssize_t
456 xwrite(int fd, char *s, size_t len) {
457 size_t aux = len;
458
459 while(len > 0) {
460 ssize_t r = write(fd, s, len);
461 if(r < 0)
462 return r;
463 len -= r;
464 s += r;
465 }
466 return aux;
467 }
468
469 void *
470 xmalloc(size_t len) {
471 void *p = malloc(len);
472
473 if(!p)
474 die("Out of memory\n");
475
476 return p;
477 }
478
479 void *
480 xrealloc(void *p, size_t len) {
481 if((p = realloc(p, len)) == NULL)
482 die("Out of memory\n");
483
484 return p;
485 }
486
487 void *
488 xcalloc(size_t nmemb, size_t size) {
489 void *p = calloc(nmemb, size);
490
491 if(!p)
492 die("Out of memory\n");
493
494 return p;
495 }
496
497 int
498 utf8decode(char *s, long *u) {
499 uchar c;
500 int i, n, rtn;
501
502 rtn = 1;
503 c = *s;
504 if(~c & B7) { /* 0xxxxxxx */
505 *u = c;
506 return rtn;
507 } else if((c & (B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */
508 *u = c&(B4|B3|B2|B1|B0);
509 n = 1;
510 } else if((c & (B7|B6|B5|B4)) == (B7|B6|B5)) { /* 1110xxxx */
511 *u = c&(B3|B2|B1|B0);
512 n = 2;
513 } else if((c & (B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) { /* 11110xxx */
514 *u = c & (B2|B1|B0);
515 n = 3;
516 } else {
517 goto invalid;
518 }
519
520 for(i = n, ++s; i > 0; --i, ++rtn, ++s) {
521 c = *s;
522 if((c & (B7|B6)) != B7) /* 10xxxxxx */
523 goto invalid;
524 *u <<= 6;
525 *u |= c & (B5|B4|B3|B2|B1|B0);
526 }
527
528 if((n == 1 && *u < 0x80) ||
529 (n == 2 && *u < 0x800) ||
530 (n == 3 && *u < 0x10000) ||
531 (*u >= 0xD800 && *u <= 0xDFFF)) {
532 goto invalid;
533 }
534
535 return rtn;
536 invalid:
537 *u = 0xFFFD;
538
539 return rtn;
540 }
541
542 int
543 utf8encode(long *u, char *s) {
544 uchar *sp;
545 ulong uc;
546 int i, n;
547
548 sp = (uchar *)s;
549 uc = *u;
550 if(uc < 0x80) {
551 *sp = uc; /* 0xxxxxxx */
552 return 1;
553 } else if(*u < 0x800) {
554 *sp = (uc >> 6) | (B7|B6); /* 110xxxxx */
555 n = 1;
556 } else if(uc < 0x10000) {
557 *sp = (uc >> 12) | (B7|B6|B5); /* 1110xxxx */
558 n = 2;
559 } else if(uc <= 0x10FFFF) {
560 *sp = (uc >> 18) | (B7|B6|B5|B4); /* 11110xxx */
561 n = 3;
562 } else {
563 goto invalid;
564 }
565
566 for(i=n,++sp; i>0; --i,++sp)
567 *sp = ((uc >> 6*(i-1)) & (B5|B4|B3|B2|B1|B0)) | B7; /* 10xxxxxx */
568
569 return n+1;
570 invalid:
571 /* U+FFFD */
572 *s++ = '\xEF';
573 *s++ = '\xBF';
574 *s = '\xBD';
575
576 return 3;
577 }
578
579 /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
580 UTF-8 otherwise return 0 */
581 int
582 isfullutf8(char *s, int b) {
583 uchar *c1, *c2, *c3;
584
585 c1 = (uchar *)s;
586 c2 = (uchar *)++s;
587 c3 = (uchar *)++s;
588 if(b < 1) {
589 return 0;
590 } else if((*c1&(B7|B6|B5)) == (B7|B6) && b == 1) {
591 return 0;
592 } else if((*c1&(B7|B6|B5|B4)) == (B7|B6|B5) &&
593 ((b == 1) ||
594 ((b == 2) && (*c2&(B7|B6)) == B7))) {
595 return 0;
596 } else if((*c1&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4) &&
597 ((b == 1) ||
598 ((b == 2) && (*c2&(B7|B6)) == B7) ||
599 ((b == 3) && (*c2&(B7|B6)) == B7 && (*c3&(B7|B6)) == B7))) {
600 return 0;
601 } else {
602 return 1;
603 }
604 }
605
606 int
607 utf8size(char *s) {
608 uchar c = *s;
609
610 if(~c&B7) {
611 return 1;
612 } else if((c&(B7|B6|B5)) == (B7|B6)) {
613 return 2;
614 } else if((c&(B7|B6|B5|B4)) == (B7|B6|B5)) {
615 return 3;
616 } else {
617 return 4;
618 }
619 }
620
621 void
622 selinit(void) {
623 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
624 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
625 sel.mode = 0;
626 sel.bx = -1;
627 sel.clip = NULL;
628 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
629 if(sel.xtarget == None)
630 sel.xtarget = XA_STRING;
631 }
632
633 static int
634 x2col(int x) {
635 x -= borderpx;
636 x /= xw.cw;
637
638 return LIMIT(x, 0, term.col-1);
639 }
640
641 static int
642 y2row(int y) {
643 y -= borderpx;
644 y /= xw.ch;
645
646 return LIMIT(y, 0, term.row-1);
647 }
648
649 static inline bool
650 selected(int x, int y) {
651 int bx, ex;
652
653 if(sel.ey == y && sel.by == y) {
654 bx = MIN(sel.bx, sel.ex);
655 ex = MAX(sel.bx, sel.ex);
656
657 return BETWEEN(x, bx, ex);
658 }
659
660 if(sel.type == SEL_RECTANGULAR) {
661 return ((sel.b.y <= y && y <= sel.e.y)
662 && (sel.b.x <= x && x <= sel.e.x));
663 }
664 return ((sel.b.y < y && y < sel.e.y)
665 || (y == sel.e.y && x <= sel.e.x))
666 || (y == sel.b.y && x >= sel.b.x
667 && (x <= sel.e.x || sel.b.y != sel.e.y));
668 }
669
670 void
671 selsnap(int mode, int *x, int *y, int direction) {
672 switch(mode) {
673 case SNAP_WORD:
674 while(*x > 0 && *x < term.col-1
675 && term.line[*y][*x + direction].c[0] != ' ') {
676 *x += direction;
677 }
678 break;
679 case SNAP_LINE:
680 *x = (direction < 0) ? 0 : term.col - 1;
681 break;
682 default:
683 break;
684 }
685 }
686
687 void
688 getbuttoninfo(XEvent *e) {
689 int type;
690 uint state = e->xbutton.state &~Button1Mask;
691
692 sel.alt = IS_SET(MODE_ALTSCREEN);
693
694 sel.ex = x2col(e->xbutton.x);
695 sel.ey = y2row(e->xbutton.y);
696
697 if (sel.by < sel.ey
698 || (sel.by == sel.ey && sel.bx < sel.ex)) {
699 selsnap(sel.snap, &sel.bx, &sel.by, -1);
700 selsnap(sel.snap, &sel.ex, &sel.ey, +1);
701 } else {
702 selsnap(sel.snap, &sel.ex, &sel.ey, -1);
703 selsnap(sel.snap, &sel.bx, &sel.by, +1);
704 }
705
706 sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
707 sel.b.y = MIN(sel.by, sel.ey);
708 sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
709 sel.e.y = MAX(sel.by, sel.ey);
710
711 sel.type = SEL_REGULAR;
712 for(type = 1; type < LEN(selmasks); ++type) {
713 if(match(selmasks[type], state)) {
714 sel.type = type;
715 break;
716 }
717 }
718 }
719
720 void
721 mousereport(XEvent *e) {
722 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
723 button = e->xbutton.button, state = e->xbutton.state,
724 len;
725 char buf[40];
726 static int ob, ox, oy;
727
728 /* from urxvt */
729 if(e->xbutton.type == MotionNotify) {
730 if(!IS_SET(MODE_MOUSEMOTION) || (x == ox && y == oy))
731 return;
732 button = ob + 32;
733 ox = x, oy = y;
734 } else if(!IS_SET(MODE_MOUSESGR)
735 && (e->xbutton.type == ButtonRelease
736 || button == AnyButton)) {
737 button = 3;
738 } else {
739 button -= Button1;
740 if(button >= 3)
741 button += 64 - 3;
742 if(e->xbutton.type == ButtonPress) {
743 ob = button;
744 ox = x, oy = y;
745 }
746 }
747
748 button += (state & ShiftMask ? 4 : 0)
749 + (state & Mod4Mask ? 8 : 0)
750 + (state & ControlMask ? 16 : 0);
751
752 len = 0;
753 if(IS_SET(MODE_MOUSESGR)) {
754 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
755 button, x+1, y+1,
756 e->xbutton.type == ButtonRelease ? 'm' : 'M');
757 } else if(x < 223 && y < 223) {
758 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
759 32+button, 32+x+1, 32+y+1);
760 } else {
761 return;
762 }
763
764 ttywrite(buf, len);
765 }
766
767 void
768 bpress(XEvent *e) {
769 struct timeval now;
770
771 if(IS_SET(MODE_MOUSE)) {
772 mousereport(e);
773 } else if(e->xbutton.button == Button1) {
774 gettimeofday(&now, NULL);
775
776 /* Clear previous selection, logically and visually. */
777 if(sel.bx != -1) {
778 sel.bx = -1;
779 tsetdirt(sel.b.y, sel.e.y);
780 draw();
781 }
782 sel.mode = 1;
783 sel.type = SEL_REGULAR;
784 sel.ex = sel.bx = x2col(e->xbutton.x);
785 sel.ey = sel.by = y2row(e->xbutton.y);
786
787 /*
788 * Snap handling.
789 * If user clicks are fasst enough (e.g. below timeouts),
790 * we ignore if his hand slipped left or down and accidentally
791 * selected more; we are just snapping to whatever we're
792 * snapping.
793 */
794 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
795 sel.snap = SNAP_LINE;
796 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
797 sel.snap = SNAP_WORD;
798 } else {
799 sel.snap = 0;
800 }
801 selsnap(sel.snap, &sel.bx, &sel.by, -1);
802 selsnap(sel.snap, &sel.ex, &sel.ey, 1);
803 sel.b.x = sel.bx;
804 sel.b.y = sel.by;
805 sel.e.x = sel.ex;
806 sel.e.y = sel.ey;
807
808 /*
809 * Draw selection, unless it's regular and we don't want to
810 * make clicks visible
811 */
812 if (sel.snap != 0) {
813 tsetdirt(sel.b.y, sel.e.y);
814 draw();
815 }
816 sel.tclick2 = sel.tclick1;
817 sel.tclick1 = now;
818 } else if(e->xbutton.button == Button4) {
819 ttywrite("\031", 1);
820 } else if(e->xbutton.button == Button5) {
821 ttywrite("\005", 1);
822 }
823 }
824
825 void
826 selcopy(void) {
827 char *str, *ptr;
828 int x, y, bufsize, size;
829 Glyph *gp, *last;
830
831 if(sel.bx == -1) {
832 str = NULL;
833 } else {
834 bufsize = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
835 ptr = str = xmalloc(bufsize);
836
837 /* append every set & selected glyph to the selection */
838 for(y = sel.b.y; y < sel.e.y + 1; y++) {
839 gp = &term.line[y][0];
840 last = gp + term.col;
841
842 while(--last >= gp && !(selected(last - gp, y) && \
843 strcmp(last->c, " ") != 0))
844 /* nothing */;
845
846 for(x = 0; gp <= last; x++, ++gp) {
847 if(!selected(x, y))
848 continue;
849
850 size = utf8size(gp->c);
851 memcpy(ptr, gp->c, size);
852 ptr += size;
853 }
854
855 /*
856 * Copy and pasting of line endings is inconsistent
857 * in the inconsistent terminal and GUI world.
858 * The best solution seems like to produce '\n' when
859 * something is copied from st and convert '\n' to
860 * '\r', when something to be pasted is received by
861 * st.
862 * FIXME: Fix the computer world.
863 */
864 if(y < sel.e.y && !((gp-1)->mode & ATTR_WRAP))
865 *ptr++ = '\n';
866 }
867 *ptr = 0;
868 }
869 xsetsel(str);
870 }
871
872 void
873 selnotify(XEvent *e) {
874 ulong nitems, ofs, rem;
875 int format;
876 uchar *data, *last, *repl;
877 Atom type;
878
879 ofs = 0;
880 do {
881 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
882 False, AnyPropertyType, &type, &format,
883 &nitems, &rem, &data)) {
884 fprintf(stderr, "Clipboard allocation failed\n");
885 return;
886 }
887
888 /*
889 * As seen in selcopy:
890 * Line endings are inconsistent in the terminal and GUI world
891 * copy and pasting. When receiving some selection data,
892 * replace all '\n' with '\r'.
893 * FIXME: Fix the computer world.
894 */
895 repl = data;
896 last = data + nitems * format / 8;
897 while((repl = memchr(repl, '\n', last - repl))) {
898 *repl++ = '\r';
899 }
900
901 ttywrite((const char *)data, nitems * format / 8);
902 XFree(data);
903 /* number of 32-bit chunks returned */
904 ofs += nitems * format / 32;
905 } while(rem > 0);
906 }
907
908 void
909 selpaste(const Arg *dummy) {
910 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
911 xw.win, CurrentTime);
912 }
913
914 void
915 clippaste(const Arg *dummy) {
916 Atom clipboard;
917
918 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
919 XConvertSelection(xw.dpy, clipboard, sel.xtarget, XA_PRIMARY,
920 xw.win, CurrentTime);
921 }
922
923 void
924 selclear(XEvent *e) {
925 if(sel.bx == -1)
926 return;
927 sel.bx = -1;
928 tsetdirt(sel.b.y, sel.e.y);
929 }
930
931 void
932 selrequest(XEvent *e) {
933 XSelectionRequestEvent *xsre;
934 XSelectionEvent xev;
935 Atom xa_targets, string;
936
937 xsre = (XSelectionRequestEvent *) e;
938 xev.type = SelectionNotify;
939 xev.requestor = xsre->requestor;
940 xev.selection = xsre->selection;
941 xev.target = xsre->target;
942 xev.time = xsre->time;
943 /* reject */
944 xev.property = None;
945
946 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
947 if(xsre->target == xa_targets) {
948 /* respond with the supported type */
949 string = sel.xtarget;
950 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
951 XA_ATOM, 32, PropModeReplace,
952 (uchar *) &string, 1);
953 xev.property = xsre->property;
954 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
955 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
956 xsre->target, 8, PropModeReplace,
957 (uchar *) sel.clip, strlen(sel.clip));
958 xev.property = xsre->property;
959 }
960
961 /* all done, send a notification to the listener */
962 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
963 fprintf(stderr, "Error sending SelectionNotify event\n");
964 }
965
966 void
967 xsetsel(char *str) {
968 /* register the selection for both the clipboard and the primary */
969 Atom clipboard;
970
971 free(sel.clip);
972 sel.clip = str;
973
974 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
975
976 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
977 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
978 }
979
980 void
981 brelease(XEvent *e) {
982 if(IS_SET(MODE_MOUSE)) {
983 mousereport(e);
984 return;
985 }
986
987 if(e->xbutton.button == Button2) {
988 selpaste(NULL);
989 } else if(e->xbutton.button == Button1) {
990 sel.mode = 0;
991 getbuttoninfo(e);
992 term.dirty[sel.ey] = 1;
993 if(sel.bx == sel.ex && sel.by == sel.ey) {
994 sel.bx = -1;
995 } else {
996 selcopy();
997 }
998 }
999 }
1000
1001 void
1002 bmotion(XEvent *e) {
1003 int oldey, oldex, oldsby, oldsey;
1004
1005 if(IS_SET(MODE_MOUSE)) {
1006 mousereport(e);
1007 return;
1008 }
1009
1010 if(!sel.mode)
1011 return;
1012
1013 oldey = sel.ey;
1014 oldex = sel.ex;
1015 oldsby = sel.b.y;
1016 oldsey = sel.e.y;
1017 getbuttoninfo(e);
1018
1019 if(oldey != sel.ey || oldex != sel.ex) {
1020 tsetdirt(MIN(sel.b.y, oldsby), MAX(sel.e.y, oldsey));
1021 }
1022 }
1023
1024 void
1025 die(const char *errstr, ...) {
1026 va_list ap;
1027
1028 va_start(ap, errstr);
1029 vfprintf(stderr, errstr, ap);
1030 va_end(ap);
1031 exit(EXIT_FAILURE);
1032 }
1033
1034 void
1035 execsh(void) {
1036 char **args;
1037 char *envshell = getenv("SHELL");
1038 const struct passwd *pass = getpwuid(getuid());
1039 char buf[sizeof(long) * 8 + 1];
1040
1041 unsetenv("COLUMNS");
1042 unsetenv("LINES");
1043 unsetenv("TERMCAP");
1044
1045 if(pass) {
1046 setenv("LOGNAME", pass->pw_name, 1);
1047 setenv("USER", pass->pw_name, 1);
1048 setenv("SHELL", pass->pw_shell, 0);
1049 setenv("HOME", pass->pw_dir, 0);
1050 }
1051
1052 snprintf(buf, sizeof(buf), "%lu", xw.win);
1053 setenv("WINDOWID", buf, 1);
1054
1055 signal(SIGCHLD, SIG_DFL);
1056 signal(SIGHUP, SIG_DFL);
1057 signal(SIGINT, SIG_DFL);
1058 signal(SIGQUIT, SIG_DFL);
1059 signal(SIGTERM, SIG_DFL);
1060 signal(SIGALRM, SIG_DFL);
1061
1062 DEFAULT(envshell, shell);
1063 setenv("TERM", termname, 1);
1064 args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
1065 execvp(args[0], args);
1066 exit(EXIT_FAILURE);
1067 }
1068
1069 void
1070 sigchld(int a) {
1071 int stat = 0;
1072
1073 if(waitpid(pid, &stat, 0) < 0)
1074 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
1075
1076 if(WIFEXITED(stat)) {
1077 exit(WEXITSTATUS(stat));
1078 } else {
1079 exit(EXIT_FAILURE);
1080 }
1081 }
1082
1083 void
1084 ttynew(void) {
1085 int m, s;
1086 struct winsize w = {term.row, term.col, 0, 0};
1087
1088 /* seems to work fine on linux, openbsd and freebsd */
1089 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1090 die("openpty failed: %s\n", SERRNO);
1091
1092 switch(pid = fork()) {
1093 case -1:
1094 die("fork failed\n");
1095 break;
1096 case 0:
1097 setsid(); /* create a new process group */
1098 dup2(s, STDIN_FILENO);
1099 dup2(s, STDOUT_FILENO);
1100 dup2(s, STDERR_FILENO);
1101 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1102 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
1103 close(s);
1104 close(m);
1105 execsh();
1106 break;
1107 default:
1108 close(s);
1109 cmdfd = m;
1110 signal(SIGCHLD, sigchld);
1111 if(opt_io) {
1112 iofd = (!strcmp(opt_io, "-")) ?
1113 STDOUT_FILENO :
1114 open(opt_io, O_WRONLY | O_CREAT, 0666);
1115 if(iofd < 0) {
1116 fprintf(stderr, "Error opening %s:%s\n",
1117 opt_io, strerror(errno));
1118 }
1119 }
1120 }
1121 }
1122
1123 void
1124 dump(char c) {
1125 static int col;
1126
1127 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
1128 if(++col % 10 == 0)
1129 fprintf(stderr, "\n");
1130 }
1131
1132 void
1133 ttyread(void) {
1134 static char buf[BUFSIZ];
1135 static int buflen = 0;
1136 char *ptr;
1137 char s[UTF_SIZ];
1138 int charsize; /* size of utf8 char in bytes */
1139 long utf8c;
1140 int ret;
1141
1142 /* append read bytes to unprocessed bytes */
1143 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1144 die("Couldn't read from shell: %s\n", SERRNO);
1145
1146 /* process every complete utf8 char */
1147 buflen += ret;
1148 ptr = buf;
1149 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
1150 charsize = utf8decode(ptr, &utf8c);
1151 utf8encode(&utf8c, s);
1152 tputc(s, charsize);
1153 ptr += charsize;
1154 buflen -= charsize;
1155 }
1156
1157 /* keep any uncomplete utf8 char for the next call */
1158 memmove(buf, ptr, buflen);
1159 }
1160
1161 void
1162 ttywrite(const char *s, size_t n) {
1163 if(write(cmdfd, s, n) == -1)
1164 die("write error on tty: %s\n", SERRNO);
1165 }
1166
1167 void
1168 ttyresize(void) {
1169 struct winsize w;
1170
1171 w.ws_row = term.row;
1172 w.ws_col = term.col;
1173 w.ws_xpixel = xw.tw;
1174 w.ws_ypixel = xw.th;
1175 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1176 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
1177 }
1178
1179 void
1180 tsetdirt(int top, int bot) {
1181 int i;
1182
1183 LIMIT(top, 0, term.row-1);
1184 LIMIT(bot, 0, term.row-1);
1185
1186 for(i = top; i <= bot; i++)
1187 term.dirty[i] = 1;
1188 }
1189
1190 void
1191 tfulldirt(void) {
1192 tsetdirt(0, term.row-1);
1193 }
1194
1195 void
1196 tcursor(int mode) {
1197 static TCursor c;
1198
1199 if(mode == CURSOR_SAVE) {
1200 c = term.c;
1201 } else if(mode == CURSOR_LOAD) {
1202 term.c = c;
1203 tmoveto(c.x, c.y);
1204 }
1205 }
1206
1207 void
1208 treset(void) {
1209 uint i;
1210
1211 term.c = (TCursor){{
1212 .mode = ATTR_NULL,
1213 .fg = defaultfg,
1214 .bg = defaultbg
1215 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1216
1217 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1218 for(i = tabspaces; i < term.col; i += tabspaces)
1219 term.tabs[i] = 1;
1220 term.top = 0;
1221 term.bot = term.row - 1;
1222 term.mode = MODE_WRAP;
1223
1224 tclearregion(0, 0, term.col-1, term.row-1);
1225 tmoveto(0, 0);
1226 tcursor(CURSOR_SAVE);
1227 }
1228
1229 void
1230 tnew(int col, int row) {
1231 memset(&term, 0, sizeof(Term));
1232 tresize(col, row);
1233 term.numlock = 1;
1234
1235 treset();
1236 }
1237
1238 void
1239 tswapscreen(void) {
1240 Line *tmp = term.line;
1241
1242 term.line = term.alt;
1243 term.alt = tmp;
1244 term.mode ^= MODE_ALTSCREEN;
1245 tfulldirt();
1246 }
1247
1248 void
1249 tscrolldown(int orig, int n) {
1250 int i;
1251 Line temp;
1252
1253 LIMIT(n, 0, term.bot-orig+1);
1254
1255 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1256
1257 for(i = term.bot; i >= orig+n; i--) {
1258 temp = term.line[i];
1259 term.line[i] = term.line[i-n];
1260 term.line[i-n] = temp;
1261
1262 term.dirty[i] = 1;
1263 term.dirty[i-n] = 1;
1264 }
1265
1266 selscroll(orig, n);
1267 }
1268
1269 void
1270 tscrollup(int orig, int n) {
1271 int i;
1272 Line temp;
1273 LIMIT(n, 0, term.bot-orig+1);
1274
1275 tclearregion(0, orig, term.col-1, orig+n-1);
1276
1277 for(i = orig; i <= term.bot-n; i++) {
1278 temp = term.line[i];
1279 term.line[i] = term.line[i+n];
1280 term.line[i+n] = temp;
1281
1282 term.dirty[i] = 1;
1283 term.dirty[i+n] = 1;
1284 }
1285
1286 selscroll(orig, -n);
1287 }
1288
1289 void
1290 selscroll(int orig, int n) {
1291 if(sel.bx == -1)
1292 return;
1293
1294 if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
1295 if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
1296 sel.bx = -1;
1297 return;
1298 }
1299 if(sel.type == SEL_RECTANGULAR) {
1300 if(sel.by < term.top)
1301 sel.by = term.top;
1302 if(sel.ey > term.bot)
1303 sel.ey = term.bot;
1304 } else {
1305 if(sel.by < term.top) {
1306 sel.by = term.top;
1307 sel.bx = 0;
1308 }
1309 if(sel.ey > term.bot) {
1310 sel.ey = term.bot;
1311 sel.ex = term.col;
1312 }
1313 }
1314 sel.b.y = sel.by, sel.b.x = sel.bx;
1315 sel.e.y = sel.ey, sel.e.x = sel.ex;
1316 }
1317 }
1318
1319 void
1320 tnewline(int first_col) {
1321 int y = term.c.y;
1322
1323 if(y == term.bot) {
1324 tscrollup(term.top, 1);
1325 } else {
1326 y++;
1327 }
1328 tmoveto(first_col ? 0 : term.c.x, y);
1329 }
1330
1331 void
1332 csiparse(void) {
1333 char *p = csiescseq.buf, *np;
1334 long int v;
1335
1336 csiescseq.narg = 0;
1337 if(*p == '?') {
1338 csiescseq.priv = 1;
1339 p++;
1340 }
1341
1342 csiescseq.buf[csiescseq.len] = '\0';
1343 while(p < csiescseq.buf+csiescseq.len) {
1344 np = NULL;
1345 v = strtol(p, &np, 10);
1346 if(np == p)
1347 v = 0;
1348 if(v == LONG_MAX || v == LONG_MIN)
1349 v = -1;
1350 csiescseq.arg[csiescseq.narg++] = v;
1351 p = np;
1352 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1353 break;
1354 p++;
1355 }
1356 csiescseq.mode = *p;
1357 }
1358
1359 /* for absolute user moves, when decom is set */
1360 void
1361 tmoveato(int x, int y) {
1362 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1363 }
1364
1365 void
1366 tmoveto(int x, int y) {
1367 int miny, maxy;
1368
1369 if(term.c.state & CURSOR_ORIGIN) {
1370 miny = term.top;
1371 maxy = term.bot;
1372 } else {
1373 miny = 0;
1374 maxy = term.row - 1;
1375 }
1376 LIMIT(x, 0, term.col-1);
1377 LIMIT(y, miny, maxy);
1378 term.c.state &= ~CURSOR_WRAPNEXT;
1379 term.c.x = x;
1380 term.c.y = y;
1381 }
1382
1383 void
1384 tsetchar(char *c, Glyph *attr, int x, int y) {
1385 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1386 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1387 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1388 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1389 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1390 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1391 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1392 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1393 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1394 };
1395
1396 /*
1397 * The table is proudly stolen from rxvt.
1398 */
1399 if(attr->mode & ATTR_GFX) {
1400 if(c[0] >= 0x41 && c[0] <= 0x7e
1401 && vt100_0[c[0] - 0x41]) {
1402 c = vt100_0[c[0] - 0x41];
1403 }
1404 }
1405
1406 term.dirty[y] = 1;
1407 term.line[y][x] = *attr;
1408 memcpy(term.line[y][x].c, c, UTF_SIZ);
1409 }
1410
1411 void
1412 tclearregion(int x1, int y1, int x2, int y2) {
1413 int x, y, temp;
1414
1415 if(x1 > x2)
1416 temp = x1, x1 = x2, x2 = temp;
1417 if(y1 > y2)
1418 temp = y1, y1 = y2, y2 = temp;
1419
1420 LIMIT(x1, 0, term.col-1);
1421 LIMIT(x2, 0, term.col-1);
1422 LIMIT(y1, 0, term.row-1);
1423 LIMIT(y2, 0, term.row-1);
1424
1425 for(y = y1; y <= y2; y++) {
1426 term.dirty[y] = 1;
1427 for(x = x1; x <= x2; x++) {
1428 term.line[y][x] = term.c.attr;
1429 memcpy(term.line[y][x].c, " ", 2);
1430 }
1431 }
1432 }
1433
1434 void
1435 tdeletechar(int n) {
1436 int src = term.c.x + n;
1437 int dst = term.c.x;
1438 int size = term.col - src;
1439
1440 term.dirty[term.c.y] = 1;
1441
1442 if(src >= term.col) {
1443 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1444 return;
1445 }
1446
1447 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1448 size * sizeof(Glyph));
1449 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1450 }
1451
1452 void
1453 tinsertblank(int n) {
1454 int src = term.c.x;
1455 int dst = src + n;
1456 int size = term.col - dst;
1457
1458 term.dirty[term.c.y] = 1;
1459
1460 if(dst >= term.col) {
1461 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1462 return;
1463 }
1464
1465 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1466 size * sizeof(Glyph));
1467 tclearregion(src, term.c.y, dst - 1, term.c.y);
1468 }
1469
1470 void
1471 tinsertblankline(int n) {
1472 if(term.c.y < term.top || term.c.y > term.bot)
1473 return;
1474
1475 tscrolldown(term.c.y, n);
1476 }
1477
1478 void
1479 tdeleteline(int n) {
1480 if(term.c.y < term.top || term.c.y > term.bot)
1481 return;
1482
1483 tscrollup(term.c.y, n);
1484 }
1485
1486 void
1487 tsetattr(int *attr, int l) {
1488 int i;
1489
1490 for(i = 0; i < l; i++) {
1491 switch(attr[i]) {
1492 case 0:
1493 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE \
1494 | ATTR_BOLD | ATTR_ITALIC \
1495 | ATTR_BLINK);
1496 term.c.attr.fg = defaultfg;
1497 term.c.attr.bg = defaultbg;
1498 break;
1499 case 1:
1500 term.c.attr.mode |= ATTR_BOLD;
1501 break;
1502 case 3:
1503 term.c.attr.mode |= ATTR_ITALIC;
1504 break;
1505 case 4:
1506 term.c.attr.mode |= ATTR_UNDERLINE;
1507 break;
1508 case 5: /* slow blink */
1509 case 6: /* rapid blink */
1510 term.c.attr.mode |= ATTR_BLINK;
1511 break;
1512 case 7:
1513 term.c.attr.mode |= ATTR_REVERSE;
1514 break;
1515 case 21:
1516 case 22:
1517 term.c.attr.mode &= ~ATTR_BOLD;
1518 break;
1519 case 23:
1520 term.c.attr.mode &= ~ATTR_ITALIC;
1521 break;
1522 case 24:
1523 term.c.attr.mode &= ~ATTR_UNDERLINE;
1524 break;
1525 case 25:
1526 case 26:
1527 term.c.attr.mode &= ~ATTR_BLINK;
1528 break;
1529 case 27:
1530 term.c.attr.mode &= ~ATTR_REVERSE;
1531 break;
1532 case 38:
1533 if(i + 2 < l && attr[i + 1] == 5) {
1534 i += 2;
1535 if(BETWEEN(attr[i], 0, 255)) {
1536 term.c.attr.fg = attr[i];
1537 } else {
1538 fprintf(stderr,
1539 "erresc: bad fgcolor %d\n",
1540 attr[i]);
1541 }
1542 } else {
1543 fprintf(stderr,
1544 "erresc(38): gfx attr %d unknown\n",
1545 attr[i]);
1546 }
1547 break;
1548 case 39:
1549 term.c.attr.fg = defaultfg;
1550 break;
1551 case 48:
1552 if(i + 2 < l && attr[i + 1] == 5) {
1553 i += 2;
1554 if(BETWEEN(attr[i], 0, 255)) {
1555 term.c.attr.bg = attr[i];
1556 } else {
1557 fprintf(stderr,
1558 "erresc: bad bgcolor %d\n",
1559 attr[i]);
1560 }
1561 } else {
1562 fprintf(stderr,
1563 "erresc(48): gfx attr %d unknown\n",
1564 attr[i]);
1565 }
1566 break;
1567 case 49:
1568 term.c.attr.bg = defaultbg;
1569 break;
1570 default:
1571 if(BETWEEN(attr[i], 30, 37)) {
1572 term.c.attr.fg = attr[i] - 30;
1573 } else if(BETWEEN(attr[i], 40, 47)) {
1574 term.c.attr.bg = attr[i] - 40;
1575 } else if(BETWEEN(attr[i], 90, 97)) {
1576 term.c.attr.fg = attr[i] - 90 + 8;
1577 } else if(BETWEEN(attr[i], 100, 107)) {
1578 term.c.attr.bg = attr[i] - 100 + 8;
1579 } else {
1580 fprintf(stderr,
1581 "erresc(default): gfx attr %d unknown\n",
1582 attr[i]), csidump();
1583 }
1584 break;
1585 }
1586 }
1587 }
1588
1589 void
1590 tsetscroll(int t, int b) {
1591 int temp;
1592
1593 LIMIT(t, 0, term.row-1);
1594 LIMIT(b, 0, term.row-1);
1595 if(t > b) {
1596 temp = t;
1597 t = b;
1598 b = temp;
1599 }
1600 term.top = t;
1601 term.bot = b;
1602 }
1603
1604 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1605
1606 void
1607 tsetmode(bool priv, bool set, int *args, int narg) {
1608 int *lim, mode;
1609 bool alt;
1610
1611 for(lim = args + narg; args < lim; ++args) {
1612 if(priv) {
1613 switch(*args) {
1614 break;
1615 case 1: /* DECCKM -- Cursor key */
1616 MODBIT(term.mode, set, MODE_APPCURSOR);
1617 break;
1618 case 5: /* DECSCNM -- Reverse video */
1619 mode = term.mode;
1620 MODBIT(term.mode, set, MODE_REVERSE);
1621 if(mode != term.mode)
1622 redraw(REDRAW_TIMEOUT);
1623 break;
1624 case 6: /* DECOM -- Origin */
1625 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1626 tmoveato(0, 0);
1627 break;
1628 case 7: /* DECAWM -- Auto wrap */
1629 MODBIT(term.mode, set, MODE_WRAP);
1630 break;
1631 case 0: /* Error (IGNORED) */
1632 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1633 case 3: /* DECCOLM -- Column (IGNORED) */
1634 case 4: /* DECSCLM -- Scroll (IGNORED) */
1635 case 8: /* DECARM -- Auto repeat (IGNORED) */
1636 case 18: /* DECPFF -- Printer feed (IGNORED) */
1637 case 19: /* DECPEX -- Printer extent (IGNORED) */
1638 case 42: /* DECNRCM -- National characters (IGNORED) */
1639 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1640 break;
1641 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1642 MODBIT(term.mode, !set, MODE_HIDE);
1643 break;
1644 case 1000: /* 1000,1002: enable xterm mouse report */
1645 MODBIT(term.mode, set, MODE_MOUSEBTN);
1646 MODBIT(term.mode, 0, MODE_MOUSEMOTION);
1647 break;
1648 case 1002:
1649 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1650 MODBIT(term.mode, 0, MODE_MOUSEBTN);
1651 break;
1652 case 1006:
1653 MODBIT(term.mode, set, MODE_MOUSESGR);
1654 break;
1655 case 1034:
1656 MODBIT(term.mode, set, MODE_8BIT);
1657 break;
1658 case 1049: /* = 1047 and 1048 */
1659 case 47:
1660 case 1047:
1661 if (!allowaltscreen)
1662 break;
1663
1664 alt = IS_SET(MODE_ALTSCREEN);
1665 if(alt) {
1666 tclearregion(0, 0, term.col-1,
1667 term.row-1);
1668 }
1669 if(set ^ alt) /* set is always 1 or 0 */
1670 tswapscreen();
1671 if(*args != 1049)
1672 break;
1673 /* FALLTRU */
1674 case 1048:
1675 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1676 break;
1677 default:
1678 fprintf(stderr,
1679 "erresc: unknown private set/reset mode %d\n",
1680 *args);
1681 break;
1682 }
1683 } else {
1684 switch(*args) {
1685 case 0: /* Error (IGNORED) */
1686 break;
1687 case 2: /* KAM -- keyboard action */
1688 MODBIT(term.mode, set, MODE_KBDLOCK);
1689 break;
1690 case 4: /* IRM -- Insertion-replacement */
1691 MODBIT(term.mode, set, MODE_INSERT);
1692 break;
1693 case 12: /* SRM -- Send/Receive */
1694 MODBIT(term.mode, !set, MODE_ECHO);
1695 break;
1696 case 20: /* LNM -- Linefeed/new line */
1697 MODBIT(term.mode, set, MODE_CRLF);
1698 break;
1699 default:
1700 fprintf(stderr,
1701 "erresc: unknown set/reset mode %d\n",
1702 *args);
1703 break;
1704 }
1705 }
1706 }
1707 }
1708 #undef MODBIT
1709
1710
1711 void
1712 csihandle(void) {
1713 switch(csiescseq.mode) {
1714 default:
1715 unknown:
1716 fprintf(stderr, "erresc: unknown csi ");
1717 csidump();
1718 /* die(""); */
1719 break;
1720 case '@': /* ICH -- Insert <n> blank char */
1721 DEFAULT(csiescseq.arg[0], 1);
1722 tinsertblank(csiescseq.arg[0]);
1723 break;
1724 case 'A': /* CUU -- Cursor <n> Up */
1725 DEFAULT(csiescseq.arg[0], 1);
1726 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1727 break;
1728 case 'B': /* CUD -- Cursor <n> Down */
1729 case 'e': /* VPR --Cursor <n> Down */
1730 DEFAULT(csiescseq.arg[0], 1);
1731 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1732 break;
1733 case 'c': /* DA -- Device Attributes */
1734 if(csiescseq.arg[0] == 0)
1735 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1736 break;
1737 case 'C': /* CUF -- Cursor <n> Forward */
1738 case 'a': /* HPR -- Cursor <n> Forward */
1739 DEFAULT(csiescseq.arg[0], 1);
1740 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1741 break;
1742 case 'D': /* CUB -- Cursor <n> Backward */
1743 DEFAULT(csiescseq.arg[0], 1);
1744 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1745 break;
1746 case 'E': /* CNL -- Cursor <n> Down and first col */
1747 DEFAULT(csiescseq.arg[0], 1);
1748 tmoveto(0, term.c.y+csiescseq.arg[0]);
1749 break;
1750 case 'F': /* CPL -- Cursor <n> Up and first col */
1751 DEFAULT(csiescseq.arg[0], 1);
1752 tmoveto(0, term.c.y-csiescseq.arg[0]);
1753 break;
1754 case 'g': /* TBC -- Tabulation clear */
1755 switch(csiescseq.arg[0]) {
1756 case 0: /* clear current tab stop */
1757 term.tabs[term.c.x] = 0;
1758 break;
1759 case 3: /* clear all the tabs */
1760 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1761 break;
1762 default:
1763 goto unknown;
1764 }
1765 break;
1766 case 'G': /* CHA -- Move to <col> */
1767 case '`': /* HPA */
1768 DEFAULT(csiescseq.arg[0], 1);
1769 tmoveto(csiescseq.arg[0]-1, term.c.y);
1770 break;
1771 case 'H': /* CUP -- Move to <row> <col> */
1772 case 'f': /* HVP */
1773 DEFAULT(csiescseq.arg[0], 1);
1774 DEFAULT(csiescseq.arg[1], 1);
1775 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1776 break;
1777 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1778 DEFAULT(csiescseq.arg[0], 1);
1779 while(csiescseq.arg[0]--)
1780 tputtab(1);
1781 break;
1782 case 'J': /* ED -- Clear screen */
1783 sel.bx = -1;
1784 switch(csiescseq.arg[0]) {
1785 case 0: /* below */
1786 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1787 if(term.c.y < term.row-1) {
1788 tclearregion(0, term.c.y+1, term.col-1,
1789 term.row-1);
1790 }
1791 break;
1792 case 1: /* above */
1793 if(term.c.y > 1)
1794 tclearregion(0, 0, term.col-1, term.c.y-1);
1795 tclearregion(0, term.c.y, term.c.x, term.c.y);
1796 break;
1797 case 2: /* all */
1798 tclearregion(0, 0, term.col-1, term.row-1);
1799 break;
1800 default:
1801 goto unknown;
1802 }
1803 break;
1804 case 'K': /* EL -- Clear line */
1805 switch(csiescseq.arg[0]) {
1806 case 0: /* right */
1807 tclearregion(term.c.x, term.c.y, term.col-1,
1808 term.c.y);
1809 break;
1810 case 1: /* left */
1811 tclearregion(0, term.c.y, term.c.x, term.c.y);
1812 break;
1813 case 2: /* all */
1814 tclearregion(0, term.c.y, term.col-1, term.c.y);
1815 break;
1816 }
1817 break;
1818 case 'S': /* SU -- Scroll <n> line up */
1819 DEFAULT(csiescseq.arg[0], 1);
1820 tscrollup(term.top, csiescseq.arg[0]);
1821 break;
1822 case 'T': /* SD -- Scroll <n> line down */
1823 DEFAULT(csiescseq.arg[0], 1);
1824 tscrolldown(term.top, csiescseq.arg[0]);
1825 break;
1826 case 'L': /* IL -- Insert <n> blank lines */
1827 DEFAULT(csiescseq.arg[0], 1);
1828 tinsertblankline(csiescseq.arg[0]);
1829 break;
1830 case 'l': /* RM -- Reset Mode */
1831 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
1832 break;
1833 case 'M': /* DL -- Delete <n> lines */
1834 DEFAULT(csiescseq.arg[0], 1);
1835 tdeleteline(csiescseq.arg[0]);
1836 break;
1837 case 'X': /* ECH -- Erase <n> char */
1838 DEFAULT(csiescseq.arg[0], 1);
1839 tclearregion(term.c.x, term.c.y,
1840 term.c.x + csiescseq.arg[0] - 1, term.c.y);
1841 break;
1842 case 'P': /* DCH -- Delete <n> char */
1843 DEFAULT(csiescseq.arg[0], 1);
1844 tdeletechar(csiescseq.arg[0]);
1845 break;
1846 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
1847 DEFAULT(csiescseq.arg[0], 1);
1848 while(csiescseq.arg[0]--)
1849 tputtab(0);
1850 break;
1851 case 'd': /* VPA -- Move to <row> */
1852 DEFAULT(csiescseq.arg[0], 1);
1853 tmoveato(term.c.x, csiescseq.arg[0]-1);
1854 break;
1855 case 'h': /* SM -- Set terminal mode */
1856 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
1857 break;
1858 case 'm': /* SGR -- Terminal attribute (color) */
1859 tsetattr(csiescseq.arg, csiescseq.narg);
1860 break;
1861 case 'r': /* DECSTBM -- Set Scrolling Region */
1862 if(csiescseq.priv) {
1863 goto unknown;
1864 } else {
1865 DEFAULT(csiescseq.arg[0], 1);
1866 DEFAULT(csiescseq.arg[1], term.row);
1867 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
1868 tmoveato(0, 0);
1869 }
1870 break;
1871 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1872 tcursor(CURSOR_SAVE);
1873 break;
1874 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1875 tcursor(CURSOR_LOAD);
1876 break;
1877 }
1878 }
1879
1880 void
1881 csidump(void) {
1882 int i;
1883 uint c;
1884
1885 printf("ESC[");
1886 for(i = 0; i < csiescseq.len; i++) {
1887 c = csiescseq.buf[i] & 0xff;
1888 if(isprint(c)) {
1889 putchar(c);
1890 } else if(c == '\n') {
1891 printf("(\\n)");
1892 } else if(c == '\r') {
1893 printf("(\\r)");
1894 } else if(c == 0x1b) {
1895 printf("(\\e)");
1896 } else {
1897 printf("(%02x)", c);
1898 }
1899 }
1900 putchar('\n');
1901 }
1902
1903 void
1904 csireset(void) {
1905 memset(&csiescseq, 0, sizeof(csiescseq));
1906 }
1907
1908 void
1909 strhandle(void) {
1910 char *p = NULL;
1911 int i, j, narg;
1912
1913 strparse();
1914 narg = strescseq.narg;
1915
1916 switch(strescseq.type) {
1917 case ']': /* OSC -- Operating System Command */
1918 switch(i = atoi(strescseq.args[0])) {
1919 case 0:
1920 case 1:
1921 case 2:
1922 if(narg > 1)
1923 xsettitle(strescseq.args[1]);
1924 break;
1925 case 4: /* color set */
1926 if(narg < 3)
1927 break;
1928 p = strescseq.args[2];
1929 /* fall through */
1930 case 104: /* color reset, here p = NULL */
1931 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
1932 if (!xsetcolorname(j, p)) {
1933 fprintf(stderr, "erresc: invalid color %s\n", p);
1934 } else {
1935 /*
1936 * TODO if defaultbg color is changed, borders
1937 * are dirty
1938 */
1939 redraw(0);
1940 }
1941 break;
1942 default:
1943 fprintf(stderr, "erresc: unknown str ");
1944 strdump();
1945 break;
1946 }
1947 break;
1948 case 'k': /* old title set compatibility */
1949 xsettitle(strescseq.args[0]);
1950 break;
1951 case 'P': /* DSC -- Device Control String */
1952 case '_': /* APC -- Application Program Command */
1953 case '^': /* PM -- Privacy Message */
1954 default:
1955 fprintf(stderr, "erresc: unknown str ");
1956 strdump();
1957 /* die(""); */
1958 break;
1959 }
1960 }
1961
1962 void
1963 strparse(void) {
1964 char *p = strescseq.buf;
1965
1966 strescseq.narg = 0;
1967 strescseq.buf[strescseq.len] = '\0';
1968 while(p && strescseq.narg < STR_ARG_SIZ)
1969 strescseq.args[strescseq.narg++] = strsep(&p, ";");
1970 }
1971
1972 void
1973 strdump(void) {
1974 int i;
1975 uint c;
1976
1977 printf("ESC%c", strescseq.type);
1978 for(i = 0; i < strescseq.len; i++) {
1979 c = strescseq.buf[i] & 0xff;
1980 if(c == '\0') {
1981 return;
1982 } else if(isprint(c)) {
1983 putchar(c);
1984 } else if(c == '\n') {
1985 printf("(\\n)");
1986 } else if(c == '\r') {
1987 printf("(\\r)");
1988 } else if(c == 0x1b) {
1989 printf("(\\e)");
1990 } else {
1991 printf("(%02x)", c);
1992 }
1993 }
1994 printf("ESC\\\n");
1995 }
1996
1997 void
1998 strreset(void) {
1999 memset(&strescseq, 0, sizeof(strescseq));
2000 }
2001
2002 void
2003 tputtab(bool forward) {
2004 uint x = term.c.x;
2005
2006 if(forward) {
2007 if(x == term.col)
2008 return;
2009 for(++x; x < term.col && !term.tabs[x]; ++x)
2010 /* nothing */ ;
2011 } else {
2012 if(x == 0)
2013 return;
2014 for(--x; x > 0 && !term.tabs[x]; --x)
2015 /* nothing */ ;
2016 }
2017 tmoveto(x, term.c.y);
2018 }
2019
2020 void
2021 techo(char *buf, int len) {
2022 for(; len > 0; buf++, len--) {
2023 char c = *buf;
2024
2025 if(c == '\033') { /* escape */
2026 tputc("^", 1);
2027 tputc("[", 1);
2028 } else if(c < '\x20') { /* control code */
2029 if(c != '\n' && c != '\r' && c != '\t') {
2030 c |= '\x40';
2031 tputc("^", 1);
2032 }
2033 tputc(&c, 1);
2034 } else {
2035 break;
2036 }
2037 }
2038 if(len)
2039 tputc(buf, len);
2040 }
2041
2042 void
2043 tputc(char *c, int len) {
2044 uchar ascii = *c;
2045 bool control = ascii < '\x20' || ascii == 0177;
2046
2047 if(iofd != -1) {
2048 if(xwrite(iofd, c, len) < 0) {
2049 fprintf(stderr, "Error writing in %s:%s\n",
2050 opt_io, strerror(errno));
2051 close(iofd);
2052 iofd = -1;
2053 }
2054 }
2055
2056 /*
2057 * STR sequences must be checked before anything else
2058 * because it can use some control codes as part of the sequence.
2059 */
2060 if(term.esc & ESC_STR) {
2061 switch(ascii) {
2062 case '\033':
2063 term.esc = ESC_START | ESC_STR_END;
2064 break;
2065 case '\a': /* backwards compatibility to xterm */
2066 term.esc = 0;
2067 strhandle();
2068 break;
2069 default:
2070 if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2071 memmove(&strescseq.buf[strescseq.len], c, len);
2072 strescseq.len += len;
2073 } else {
2074 /*
2075 * Here is a bug in terminals. If the user never sends
2076 * some code to stop the str or esc command, then st
2077 * will stop responding. But this is better than
2078 * silently failing with unknown characters. At least
2079 * then users will report back.
2080 *
2081 * In the case users ever get fixed, here is the code:
2082 */
2083 /*
2084 * term.esc = 0;
2085 * strhandle();
2086 */
2087 }
2088 }
2089 return;
2090 }
2091
2092 /*
2093 * Actions of control codes must be performed as soon they arrive
2094 * because they can be embedded inside a control sequence, and
2095 * they must not cause conflicts with sequences.
2096 */
2097 if(control) {
2098 switch(ascii) {
2099 case '\t': /* HT */
2100 tputtab(1);
2101 return;
2102 case '\b': /* BS */
2103 tmoveto(term.c.x-1, term.c.y);
2104 return;
2105 case '\r': /* CR */
2106 tmoveto(0, term.c.y);
2107 return;
2108 case '\f': /* LF */
2109 case '\v': /* VT */
2110 case '\n': /* LF */
2111 /* go to first col if the mode is set */
2112 tnewline(IS_SET(MODE_CRLF));
2113 return;
2114 case '\a': /* BEL */
2115 if(!(xw.state & WIN_FOCUSED))
2116 xseturgency(1);
2117 return;
2118 case '\033': /* ESC */
2119 csireset();
2120 term.esc = ESC_START;
2121 return;
2122 case '\016': /* SO */
2123 case '\017': /* SI */
2124 /*
2125 * Different charsets are hard to handle. Applications
2126 * should use the right alt charset escapes for the
2127 * only reason they still exist: line drawing. The
2128 * rest is incompatible history st should not support.
2129 */
2130 return;
2131 case '\032': /* SUB */
2132 case '\030': /* CAN */
2133 csireset();
2134 return;
2135 case '\005': /* ENQ (IGNORED) */
2136 case '\000': /* NUL (IGNORED) */
2137 case '\021': /* XON (IGNORED) */
2138 case '\023': /* XOFF (IGNORED) */
2139 case 0177: /* DEL (IGNORED) */
2140 return;
2141 }
2142 } else if(term.esc & ESC_START) {
2143 if(term.esc & ESC_CSI) {
2144 csiescseq.buf[csiescseq.len++] = ascii;
2145 if(BETWEEN(ascii, 0x40, 0x7E)
2146 || csiescseq.len >= \
2147 sizeof(csiescseq.buf)-1) {
2148 term.esc = 0;
2149 csiparse();
2150 csihandle();
2151 }
2152 } else if(term.esc & ESC_STR_END) {
2153 term.esc = 0;
2154 if(ascii == '\\')
2155 strhandle();
2156 } else if(term.esc & ESC_ALTCHARSET) {
2157 switch(ascii) {
2158 case '0': /* Line drawing set */
2159 term.c.attr.mode |= ATTR_GFX;
2160 break;
2161 case 'B': /* USASCII */
2162 term.c.attr.mode &= ~ATTR_GFX;
2163 break;
2164 case 'A': /* UK (IGNORED) */
2165 case '<': /* multinational charset (IGNORED) */
2166 case '5': /* Finnish (IGNORED) */
2167 case 'C': /* Finnish (IGNORED) */
2168 case 'K': /* German (IGNORED) */
2169 break;
2170 default:
2171 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2172 }
2173 term.esc = 0;
2174 } else if(term.esc & ESC_TEST) {
2175 if(ascii == '8') { /* DEC screen alignment test. */
2176 char E[UTF_SIZ] = "E";
2177 int x, y;
2178
2179 for(x = 0; x < term.col; ++x) {
2180 for(y = 0; y < term.row; ++y)
2181 tsetchar(E, &term.c.attr, x, y);
2182 }
2183 }
2184 term.esc = 0;
2185 } else {
2186 switch(ascii) {
2187 case '[':
2188 term.esc |= ESC_CSI;
2189 break;
2190 case '#':
2191 term.esc |= ESC_TEST;
2192 break;
2193 case 'P': /* DCS -- Device Control String */
2194 case '_': /* APC -- Application Program Command */
2195 case '^': /* PM -- Privacy Message */
2196 case ']': /* OSC -- Operating System Command */
2197 case 'k': /* old title set compatibility */
2198 strreset();
2199 strescseq.type = ascii;
2200 term.esc |= ESC_STR;
2201 break;
2202 case '(': /* set primary charset G0 */
2203 term.esc |= ESC_ALTCHARSET;
2204 break;
2205 case ')': /* set secondary charset G1 (IGNORED) */
2206 case '*': /* set tertiary charset G2 (IGNORED) */
2207 case '+': /* set quaternary charset G3 (IGNORED) */
2208 term.esc = 0;
2209 break;
2210 case 'D': /* IND -- Linefeed */
2211 if(term.c.y == term.bot) {
2212 tscrollup(term.top, 1);
2213 } else {
2214 tmoveto(term.c.x, term.c.y+1);
2215 }
2216 term.esc = 0;
2217 break;
2218 case 'E': /* NEL -- Next line */
2219 tnewline(1); /* always go to first col */
2220 term.esc = 0;
2221 break;
2222 case 'H': /* HTS -- Horizontal tab stop */
2223 term.tabs[term.c.x] = 1;
2224 term.esc = 0;
2225 break;
2226 case 'M': /* RI -- Reverse index */
2227 if(term.c.y == term.top) {
2228 tscrolldown(term.top, 1);
2229 } else {
2230 tmoveto(term.c.x, term.c.y-1);
2231 }
2232 term.esc = 0;
2233 break;
2234 case 'Z': /* DECID -- Identify Terminal */
2235 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2236 term.esc = 0;
2237 break;
2238 case 'c': /* RIS -- Reset to inital state */
2239 treset();
2240 term.esc = 0;
2241 xresettitle();
2242 break;
2243 case '=': /* DECPAM -- Application keypad */
2244 term.mode |= MODE_APPKEYPAD;
2245 term.esc = 0;
2246 break;
2247 case '>': /* DECPNM -- Normal keypad */
2248 term.mode &= ~MODE_APPKEYPAD;
2249 term.esc = 0;
2250 break;
2251 case '7': /* DECSC -- Save Cursor */
2252 tcursor(CURSOR_SAVE);
2253 term.esc = 0;
2254 break;
2255 case '8': /* DECRC -- Restore Cursor */
2256 tcursor(CURSOR_LOAD);
2257 term.esc = 0;
2258 break;
2259 case '\\': /* ST -- Stop */
2260 term.esc = 0;
2261 break;
2262 default:
2263 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2264 (uchar) ascii, isprint(ascii)? ascii:'.');
2265 term.esc = 0;
2266 }
2267 }
2268 /*
2269 * All characters which form part of a sequence are not
2270 * printed
2271 */
2272 return;
2273 }
2274 /*
2275 * Display control codes only if we are in graphic mode
2276 */
2277 if(control && !(term.c.attr.mode & ATTR_GFX))
2278 return;
2279 if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
2280 sel.bx = -1;
2281 if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2282 term.line[term.c.y][term.c.x].mode |= ATTR_WRAP;
2283 tnewline(1);
2284 }
2285
2286 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col) {
2287 memmove(&term.line[term.c.y][term.c.x+1],
2288 &term.line[term.c.y][term.c.x],
2289 (term.col - term.c.x - 1) * sizeof(Glyph));
2290 }
2291
2292 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2293 if(term.c.x+1 < term.col) {
2294 tmoveto(term.c.x+1, term.c.y);
2295 } else {
2296 term.c.state |= CURSOR_WRAPNEXT;
2297 }
2298 }
2299
2300 int
2301 tresize(int col, int row) {
2302 int i;
2303 int minrow = MIN(row, term.row);
2304 int mincol = MIN(col, term.col);
2305 int slide = term.c.y - row + 1;
2306 bool *bp;
2307 Line *orig;
2308
2309 if(col < 1 || row < 1)
2310 return 0;
2311
2312 /* free unneeded rows */
2313 i = 0;
2314 if(slide > 0) {
2315 /*
2316 * slide screen to keep cursor where we expect it -
2317 * tscrollup would work here, but we can optimize to
2318 * memmove because we're freeing the earlier lines
2319 */
2320 for(/* i = 0 */; i < slide; i++) {
2321 free(term.line[i]);
2322 free(term.alt[i]);
2323 }
2324 memmove(term.line, term.line + slide, row * sizeof(Line));
2325 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2326 }
2327 for(i += row; i < term.row; i++) {
2328 free(term.line[i]);
2329 free(term.alt[i]);
2330 }
2331
2332 /* resize to new height */
2333 term.line = xrealloc(term.line, row * sizeof(Line));
2334 term.alt = xrealloc(term.alt, row * sizeof(Line));
2335 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2336 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2337
2338 /* resize each row to new width, zero-pad if needed */
2339 for(i = 0; i < minrow; i++) {
2340 term.dirty[i] = 1;
2341 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2342 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2343 }
2344
2345 /* allocate any new rows */
2346 for(/* i == minrow */; i < row; i++) {
2347 term.dirty[i] = 1;
2348 term.line[i] = xcalloc(col, sizeof(Glyph));
2349 term.alt [i] = xcalloc(col, sizeof(Glyph));
2350 }
2351 if(col > term.col) {
2352 bp = term.tabs + term.col;
2353
2354 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2355 while(--bp > term.tabs && !*bp)
2356 /* nothing */ ;
2357 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2358 *bp = 1;
2359 }
2360 /* update terminal size */
2361 term.col = col;
2362 term.row = row;
2363 /* reset scrolling region */
2364 tsetscroll(0, row-1);
2365 /* make use of the LIMIT in tmoveto */
2366 tmoveto(term.c.x, term.c.y);
2367 /* Clearing both screens */
2368 orig = term.line;
2369 do {
2370 if(mincol < col && 0 < minrow) {
2371 tclearregion(mincol, 0, col - 1, minrow - 1);
2372 }
2373 if(0 < col && minrow < row) {
2374 tclearregion(0, minrow, col - 1, row - 1);
2375 }
2376 tswapscreen();
2377 } while(orig != term.line);
2378
2379 return (slide > 0);
2380 }
2381
2382 void
2383 xresize(int col, int row) {
2384 xw.tw = MAX(1, col * xw.cw);
2385 xw.th = MAX(1, row * xw.ch);
2386
2387 XFreePixmap(xw.dpy, xw.buf);
2388 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2389 DefaultDepth(xw.dpy, xw.scr));
2390 XftDrawChange(xw.draw, xw.buf);
2391 xclear(0, 0, xw.w, xw.h);
2392 }
2393
2394 static inline ushort
2395 sixd_to_16bit(int x) {
2396 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2397 }
2398
2399 void
2400 xloadcols(void) {
2401 int i, r, g, b;
2402 XRenderColor color = { .alpha = 0xffff };
2403
2404 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
2405 for(i = 0; i < LEN(colorname); i++) {
2406 if(!colorname[i])
2407 continue;
2408 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2409 die("Could not allocate color '%s'\n", colorname[i]);
2410 }
2411 }
2412
2413 /* load colors [16-255] ; same colors as xterm */
2414 for(i = 16, r = 0; r < 6; r++) {
2415 for(g = 0; g < 6; g++) {
2416 for(b = 0; b < 6; b++) {
2417 color.red = sixd_to_16bit(r);
2418 color.green = sixd_to_16bit(g);
2419 color.blue = sixd_to_16bit(b);
2420 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i])) {
2421 die("Could not allocate color %d\n", i);
2422 }
2423 i++;
2424 }
2425 }
2426 }
2427
2428 for(r = 0; r < 24; r++, i++) {
2429 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
2430 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color,
2431 &dc.col[i])) {
2432 die("Could not allocate color %d\n", i);
2433 }
2434 }
2435 }
2436
2437 int
2438 xsetcolorname(int x, const char *name) {
2439 XRenderColor color = { .alpha = 0xffff };
2440 Colour colour;
2441 if (x < 0 || x > LEN(colorname))
2442 return -1;
2443 if(!name) {
2444 if(16 <= x && x < 16 + 216) {
2445 int r = (x - 16) / 36, g = ((x - 16) % 36) / 6, b = (x - 16) % 6;
2446 color.red = sixd_to_16bit(r);
2447 color.green = sixd_to_16bit(g);
2448 color.blue = sixd_to_16bit(b);
2449 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2450 return 0; /* something went wrong */
2451 dc.col[x] = colour;
2452 return 1;
2453 } else if (16 + 216 <= x && x < 256) {
2454 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (x - (16 + 216));
2455 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2456 return 0; /* something went wrong */
2457 dc.col[x] = colour;
2458 return 1;
2459 } else {
2460 name = colorname[x];
2461 }
2462 }
2463 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &colour))
2464 return 0;
2465 dc.col[x] = colour;
2466 return 1;
2467 }
2468
2469 void
2470 xtermclear(int col1, int row1, int col2, int row2) {
2471 XftDrawRect(xw.draw,
2472 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2473 borderpx + col1 * xw.cw,
2474 borderpx + row1 * xw.ch,
2475 (col2-col1+1) * xw.cw,
2476 (row2-row1+1) * xw.ch);
2477 }
2478
2479 /*
2480 * Absolute coordinates.
2481 */
2482 void
2483 xclear(int x1, int y1, int x2, int y2) {
2484 XftDrawRect(xw.draw,
2485 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2486 x1, y1, x2-x1, y2-y1);
2487 }
2488
2489 void
2490 xhints(void) {
2491 XClassHint class = {opt_class ? opt_class : termname, termname};
2492 XWMHints wm = {.flags = InputHint, .input = 1};
2493 XSizeHints *sizeh = NULL;
2494
2495 sizeh = XAllocSizeHints();
2496 if(xw.isfixed == False) {
2497 sizeh->flags = PSize | PResizeInc | PBaseSize;
2498 sizeh->height = xw.h;
2499 sizeh->width = xw.w;
2500 sizeh->height_inc = xw.ch;
2501 sizeh->width_inc = xw.cw;
2502 sizeh->base_height = 2 * borderpx;
2503 sizeh->base_width = 2 * borderpx;
2504 } else {
2505 sizeh->flags = PMaxSize | PMinSize;
2506 sizeh->min_width = sizeh->max_width = xw.fw;
2507 sizeh->min_height = sizeh->max_height = xw.fh;
2508 }
2509
2510 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
2511 XFree(sizeh);
2512 }
2513
2514 int
2515 xloadfont(Font *f, FcPattern *pattern) {
2516 FcPattern *match;
2517 FcResult result;
2518
2519 match = FcFontMatch(NULL, pattern, &result);
2520 if(!match)
2521 return 1;
2522
2523 if(!(f->set = FcFontSort(0, match, FcTrue, 0, &result))) {
2524 FcPatternDestroy(match);
2525 return 1;
2526 }
2527
2528 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2529 FcPatternDestroy(match);
2530 return 1;
2531 }
2532
2533 f->pattern = FcPatternDuplicate(pattern);
2534
2535 f->ascent = f->match->ascent;
2536 f->descent = f->match->descent;
2537 f->lbearing = 0;
2538 f->rbearing = f->match->max_advance_width;
2539
2540 f->height = f->ascent + f->descent;
2541 f->width = f->lbearing + f->rbearing;
2542
2543 return 0;
2544 }
2545
2546 void
2547 xloadfonts(char *fontstr, int fontsize) {
2548 FcPattern *pattern;
2549 FcResult result;
2550 double fontval;
2551
2552 if(fontstr[0] == '-') {
2553 pattern = XftXlfdParse(fontstr, False, False);
2554 } else {
2555 pattern = FcNameParse((FcChar8 *)fontstr);
2556 }
2557
2558 if(!pattern)
2559 die("st: can't open font %s\n", fontstr);
2560
2561 if(fontsize > 0) {
2562 FcPatternDel(pattern, FC_PIXEL_SIZE);
2563 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2564 usedfontsize = fontsize;
2565 } else {
2566 result = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2567 if(result == FcResultMatch) {
2568 usedfontsize = (int)fontval;
2569 } else {
2570 /*
2571 * Default font size is 12, if none given. This is to
2572 * have a known usedfontsize value.
2573 */
2574 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
2575 usedfontsize = 12;
2576 }
2577 }
2578
2579 FcConfigSubstitute(0, pattern, FcMatchPattern);
2580 FcDefaultSubstitute(pattern);
2581
2582 if(xloadfont(&dc.font, pattern))
2583 die("st: can't open font %s\n", fontstr);
2584
2585 /* Setting character width and height. */
2586 xw.cw = dc.font.width;
2587 xw.ch = dc.font.height;
2588
2589 FcPatternDel(pattern, FC_SLANT);
2590 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
2591 if(xloadfont(&dc.ifont, pattern))
2592 die("st: can't open font %s\n", fontstr);
2593
2594 FcPatternDel(pattern, FC_WEIGHT);
2595 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
2596 if(xloadfont(&dc.ibfont, pattern))
2597 die("st: can't open font %s\n", fontstr);
2598
2599 FcPatternDel(pattern, FC_SLANT);
2600 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
2601 if(xloadfont(&dc.bfont, pattern))
2602 die("st: can't open font %s\n", fontstr);
2603
2604 FcPatternDestroy(pattern);
2605 }
2606
2607 void
2608 xunloadfonts(void) {
2609 int i, ip;
2610
2611 /*
2612 * Free the loaded fonts in the font cache. This is done backwards
2613 * from the frccur.
2614 */
2615 for(i = 0, ip = frccur; i < frclen; i++, ip--) {
2616 if(ip < 0)
2617 ip = LEN(frc) - 1;
2618 XftFontClose(xw.dpy, frc[ip].font);
2619 }
2620 frccur = -1;
2621 frclen = 0;
2622
2623 XftFontClose(xw.dpy, dc.font.match);
2624 FcPatternDestroy(dc.font.pattern);
2625 FcFontSetDestroy(dc.font.set);
2626 XftFontClose(xw.dpy, dc.bfont.match);
2627 FcPatternDestroy(dc.bfont.pattern);
2628 FcFontSetDestroy(dc.bfont.set);
2629 XftFontClose(xw.dpy, dc.ifont.match);
2630 FcPatternDestroy(dc.ifont.pattern);
2631 FcFontSetDestroy(dc.ifont.set);
2632 XftFontClose(xw.dpy, dc.ibfont.match);
2633 FcPatternDestroy(dc.ibfont.pattern);
2634 FcFontSetDestroy(dc.ibfont.set);
2635 }
2636
2637 void
2638 xzoom(const Arg *arg) {
2639 xunloadfonts();
2640 xloadfonts(usedfont, usedfontsize + arg->i);
2641 cresize(0, 0);
2642 redraw(0);
2643 }
2644
2645 void
2646 xinit(void) {
2647 XSetWindowAttributes attrs;
2648 XGCValues gcvalues;
2649 Cursor cursor;
2650 Window parent;
2651 int sw, sh;
2652
2653 if(!(xw.dpy = XOpenDisplay(NULL)))
2654 die("Can't open display\n");
2655 xw.scr = XDefaultScreen(xw.dpy);
2656 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
2657
2658 /* font */
2659 if(!FcInit())
2660 die("Could not init fontconfig.\n");
2661
2662 usedfont = (opt_font == NULL)? font : opt_font;
2663 xloadfonts(usedfont, 0);
2664
2665 /* colors */
2666 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
2667 xloadcols();
2668
2669 /* adjust fixed window geometry */
2670 if(xw.isfixed) {
2671 sw = DisplayWidth(xw.dpy, xw.scr);
2672 sh = DisplayHeight(xw.dpy, xw.scr);
2673 if(xw.fx < 0)
2674 xw.fx = sw + xw.fx - xw.fw - 1;
2675 if(xw.fy < 0)
2676 xw.fy = sh + xw.fy - xw.fh - 1;
2677
2678 xw.h = xw.fh;
2679 xw.w = xw.fw;
2680 } else {
2681 /* window - default size */
2682 xw.h = 2 * borderpx + term.row * xw.ch;
2683 xw.w = 2 * borderpx + term.col * xw.cw;
2684 xw.fx = 0;
2685 xw.fy = 0;
2686 }
2687
2688 /* Events */
2689 attrs.background_pixel = dc.col[defaultbg].pixel;
2690 attrs.border_pixel = dc.col[defaultbg].pixel;
2691 attrs.bit_gravity = NorthWestGravity;
2692 attrs.event_mask = FocusChangeMask | KeyPressMask
2693 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
2694 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
2695 attrs.colormap = xw.cmap;
2696
2697 parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
2698 XRootWindow(xw.dpy, xw.scr);
2699 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
2700 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
2701 xw.vis,
2702 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
2703 | CWColormap,
2704 &attrs);
2705
2706 memset(&gcvalues, 0, sizeof(gcvalues));
2707 gcvalues.graphics_exposures = False;
2708 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
2709 &gcvalues);
2710 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2711 DefaultDepth(xw.dpy, xw.scr));
2712 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
2713 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
2714
2715 /* Xft rendering context */
2716 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
2717
2718 /* input methods */
2719 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2720 XSetLocaleModifiers("@im=local");
2721 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2722 XSetLocaleModifiers("@im=");
2723 if((xw.xim = XOpenIM(xw.dpy,
2724 NULL, NULL, NULL)) == NULL) {
2725 die("XOpenIM failed. Could not open input"
2726 " device.\n");
2727 }
2728 }
2729 }
2730 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
2731 | XIMStatusNothing, XNClientWindow, xw.win,
2732 XNFocusWindow, xw.win, NULL);
2733 if(xw.xic == NULL)
2734 die("XCreateIC failed. Could not obtain input method.\n");
2735
2736 /* white cursor, black outline */
2737 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
2738 XDefineCursor(xw.dpy, xw.win, cursor);
2739 XRecolorCursor(xw.dpy, cursor,
2740 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
2741 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
2742
2743 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
2744 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
2745 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
2746
2747 xresettitle();
2748 XMapWindow(xw.dpy, xw.win);
2749 xhints();
2750 XSync(xw.dpy, 0);
2751 }
2752
2753 void
2754 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
2755 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
2756 width = charlen * xw.cw, xp, i;
2757 int frp, frcflags;
2758 int u8fl, u8fblen, u8cblen, doesexist;
2759 char *u8c, *u8fs;
2760 long u8char;
2761 Font *font = &dc.font;
2762 FcResult fcres;
2763 FcPattern *fcpattern, *fontpattern;
2764 FcFontSet *fcsets[] = { NULL };
2765 FcCharSet *fccharset;
2766 Colour *fg, *bg, *temp, revfg, revbg;
2767 XRenderColor colfg, colbg;
2768 Rectangle r;
2769
2770 frcflags = FRC_NORMAL;
2771
2772 if(base.mode & ATTR_ITALIC) {
2773 if(base.fg == defaultfg)
2774 base.fg = defaultitalic;
2775 font = &dc.ifont;
2776 frcflags = FRC_ITALIC;
2777 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
2778 if(base.fg == defaultfg)
2779 base.fg = defaultitalic;
2780 font = &dc.ibfont;
2781 frcflags = FRC_ITALICBOLD;
2782 } else if(base.mode & ATTR_UNDERLINE) {
2783 if(base.fg == defaultfg)
2784 base.fg = defaultunderline;
2785 }
2786 fg = &dc.col[base.fg];
2787 bg = &dc.col[base.bg];
2788
2789 if(base.mode & ATTR_BOLD) {
2790 if(BETWEEN(base.fg, 0, 7)) {
2791 /* basic system colors */
2792 fg = &dc.col[base.fg + 8];
2793 } else if(BETWEEN(base.fg, 16, 195)) {
2794 /* 256 colors */
2795 fg = &dc.col[base.fg + 36];
2796 } else if(BETWEEN(base.fg, 232, 251)) {
2797 /* greyscale */
2798 fg = &dc.col[base.fg + 4];
2799 }
2800 /*
2801 * Those ranges will not be brightened:
2802 * 8 - 15 – bright system colors
2803 * 196 - 231 – highest 256 color cube
2804 * 252 - 255 – brightest colors in greyscale
2805 */
2806 font = &dc.bfont;
2807 frcflags = FRC_BOLD;
2808 }
2809
2810 if(IS_SET(MODE_REVERSE)) {
2811 if(fg == &dc.col[defaultfg]) {
2812 fg = &dc.col[defaultbg];
2813 } else {
2814 colfg.red = ~fg->color.red;
2815 colfg.green = ~fg->color.green;
2816 colfg.blue = ~fg->color.blue;
2817 colfg.alpha = fg->color.alpha;
2818 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
2819 fg = &revfg;
2820 }
2821
2822 if(bg == &dc.col[defaultbg]) {
2823 bg = &dc.col[defaultfg];
2824 } else {
2825 colbg.red = ~bg->color.red;
2826 colbg.green = ~bg->color.green;
2827 colbg.blue = ~bg->color.blue;
2828 colbg.alpha = bg->color.alpha;
2829 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &revbg);
2830 bg = &revbg;
2831 }
2832 }
2833
2834 if(base.mode & ATTR_REVERSE) {
2835 temp = fg;
2836 fg = bg;
2837 bg = temp;
2838 }
2839
2840 /* Intelligent cleaning up of the borders. */
2841 if(x == 0) {
2842 xclear(0, (y == 0)? 0 : winy, borderpx,
2843 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
2844 }
2845 if(x + charlen >= term.col) {
2846 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
2847 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
2848 }
2849 if(y == 0)
2850 xclear(winx, 0, winx + width, borderpx);
2851 if(y == term.row-1)
2852 xclear(winx, winy + xw.ch, winx + width, xw.h);
2853
2854 /* Clean up the region we want to draw to. */
2855 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
2856 r.x = 0;
2857 r.y = 0;
2858 r.height = xw.ch;
2859 r.width = width;
2860 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
2861
2862 fcsets[0] = font->set;
2863 for(xp = winx; bytelen > 0;) {
2864 /*
2865 * Search for the range in the to be printed string of glyphs
2866 * that are in the main font. Then print that range. If
2867 * some glyph is found that is not in the font, do the
2868 * fallback dance.
2869 */
2870 u8fs = s;
2871 u8fblen = 0;
2872 u8fl = 0;
2873 for(;;) {
2874 u8c = s;
2875 u8cblen = utf8decode(s, &u8char);
2876 s += u8cblen;
2877 bytelen -= u8cblen;
2878
2879 doesexist = XftCharIndex(xw.dpy, font->match, u8char);
2880 if(!doesexist || bytelen <= 0) {
2881 if(bytelen <= 0) {
2882 if(doesexist) {
2883 u8fl++;
2884 u8fblen += u8cblen;
2885 }
2886 }
2887
2888 if(u8fl > 0) {
2889 XftDrawStringUtf8(xw.draw, fg,
2890 font->match, xp,
2891 winy + font->ascent,
2892 (FcChar8 *)u8fs,
2893 u8fblen);
2894 xp += font->width * u8fl;
2895
2896 }
2897 break;
2898 }
2899
2900 u8fl++;
2901 u8fblen += u8cblen;
2902 }
2903 if(doesexist)
2904 break;
2905
2906 frp = frccur;
2907 /* Search the font cache. */
2908 for(i = 0; i < frclen; i++, frp--) {
2909 if(frp <= 0)
2910 frp = LEN(frc) - 1;
2911
2912 if(frc[frp].c == u8char
2913 && frc[frp].flags == frcflags) {
2914 break;
2915 }
2916 }
2917
2918 /* Nothing was found. */
2919 if(i >= frclen) {
2920 /*
2921 * Nothing was found in the cache. Now use
2922 * some dozen of Fontconfig calls to get the
2923 * font for one single character.
2924 */
2925 fcpattern = FcPatternDuplicate(font->pattern);
2926 fccharset = FcCharSetCreate();
2927
2928 FcCharSetAddChar(fccharset, u8char);
2929 FcPatternAddCharSet(fcpattern, FC_CHARSET,
2930 fccharset);
2931 FcPatternAddBool(fcpattern, FC_SCALABLE,
2932 FcTrue);
2933
2934 FcConfigSubstitute(0, fcpattern,
2935 FcMatchPattern);
2936 FcDefaultSubstitute(fcpattern);
2937
2938 fontpattern = FcFontSetMatch(0, fcsets,
2939 FcTrue, fcpattern, &fcres);
2940
2941 /*
2942 * Overwrite or create the new cache entry.
2943 */
2944 frccur++;
2945 frclen++;
2946 if(frccur >= LEN(frc))
2947 frccur = 0;
2948 if(frclen > LEN(frc)) {
2949 frclen = LEN(frc);
2950 XftFontClose(xw.dpy, frc[frccur].font);
2951 }
2952
2953 frc[frccur].font = XftFontOpenPattern(xw.dpy,
2954 fontpattern);
2955 frc[frccur].c = u8char;
2956 frc[frccur].flags = frcflags;
2957
2958 FcPatternDestroy(fcpattern);
2959 FcCharSetDestroy(fccharset);
2960
2961 frp = frccur;
2962 }
2963
2964 XftDrawStringUtf8(xw.draw, fg, frc[frp].font,
2965 xp, winy + frc[frp].font->ascent,
2966 (FcChar8 *)u8c, u8cblen);
2967
2968 xp += font->width;
2969 }
2970
2971 /*
2972 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
2973 winy + font->ascent, (FcChar8 *)s, bytelen);
2974 */
2975
2976 if(base.mode & ATTR_UNDERLINE) {
2977 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
2978 width, 1);
2979 }
2980
2981 /* Reset clip to none. */
2982 XftDrawSetClip(xw.draw, 0);
2983 }
2984
2985 void
2986 xdrawcursor(void) {
2987 static int oldx = 0, oldy = 0;
2988 int sl;
2989 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
2990
2991 LIMIT(oldx, 0, term.col-1);
2992 LIMIT(oldy, 0, term.row-1);
2993
2994 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
2995
2996 /* remove the old cursor */
2997 sl = utf8size(term.line[oldy][oldx].c);
2998 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
2999 oldy, 1, sl);
3000
3001 /* draw the new one */
3002 if(!(IS_SET(MODE_HIDE))) {
3003 if(xw.state & WIN_FOCUSED) {
3004 if(IS_SET(MODE_REVERSE)) {
3005 g.mode |= ATTR_REVERSE;
3006 g.fg = defaultcs;
3007 g.bg = defaultfg;
3008 }
3009
3010 sl = utf8size(g.c);
3011 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
3012 } else {
3013 XftDrawRect(xw.draw, &dc.col[defaultcs],
3014 borderpx + term.c.x * xw.cw,
3015 borderpx + term.c.y * xw.ch,
3016 xw.cw - 1, 1);
3017 XftDrawRect(xw.draw, &dc.col[defaultcs],
3018 borderpx + term.c.x * xw.cw,
3019 borderpx + term.c.y * xw.ch,
3020 1, xw.ch - 1);
3021 XftDrawRect(xw.draw, &dc.col[defaultcs],
3022 borderpx + (term.c.x + 1) * xw.cw - 1,
3023 borderpx + term.c.y * xw.ch,
3024 1, xw.ch - 1);
3025 XftDrawRect(xw.draw, &dc.col[defaultcs],
3026 borderpx + term.c.x * xw.cw,
3027 borderpx + (term.c.y + 1) * xw.ch - 1,
3028 xw.cw, 1);
3029 }
3030 oldx = term.c.x, oldy = term.c.y;
3031 }
3032 }
3033
3034
3035 void
3036 xsettitle(char *p) {
3037 XTextProperty prop;
3038
3039 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3040 &prop);
3041 XSetWMName(xw.dpy, xw.win, &prop);
3042 }
3043
3044 void
3045 xresettitle(void) {
3046 xsettitle(opt_title ? opt_title : "st");
3047 }
3048
3049 void
3050 redraw(int timeout) {
3051 struct timespec tv = {0, timeout * 1000};
3052
3053 tfulldirt();
3054 draw();
3055
3056 if(timeout > 0) {
3057 nanosleep(&tv, NULL);
3058 XSync(xw.dpy, False); /* necessary for a good tput flash */
3059 }
3060 }
3061
3062 void
3063 draw(void) {
3064 drawregion(0, 0, term.col, term.row);
3065 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3066 xw.h, 0, 0);
3067 XSetForeground(xw.dpy, dc.gc,
3068 dc.col[IS_SET(MODE_REVERSE)?
3069 defaultfg : defaultbg].pixel);
3070 }
3071
3072 void
3073 drawregion(int x1, int y1, int x2, int y2) {
3074 int ic, ib, x, y, ox, sl;
3075 Glyph base, new;
3076 char buf[DRAW_BUF_SIZ];
3077 bool ena_sel = sel.bx != -1;
3078
3079 if(sel.alt ^ IS_SET(MODE_ALTSCREEN))
3080 ena_sel = 0;
3081
3082 if(!(xw.state & WIN_VISIBLE))
3083 return;
3084
3085 for(y = y1; y < y2; y++) {
3086 if(!term.dirty[y])
3087 continue;
3088
3089 xtermclear(0, y, term.col, y);
3090 term.dirty[y] = 0;
3091 base = term.line[y][0];
3092 ic = ib = ox = 0;
3093 for(x = x1; x < x2; x++) {
3094 new = term.line[y][x];
3095 if(ena_sel && *(new.c) && selected(x, y))
3096 new.mode ^= ATTR_REVERSE;
3097 if(ib > 0 && (ATTRCMP(base, new)
3098 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3099 xdraws(buf, base, ox, y, ic, ib);
3100 ic = ib = 0;
3101 }
3102 if(ib == 0) {
3103 ox = x;
3104 base = new;
3105 }
3106
3107 sl = utf8size(new.c);
3108 memcpy(buf+ib, new.c, sl);
3109 ib += sl;
3110 ++ic;
3111 }
3112 if(ib > 0)
3113 xdraws(buf, base, ox, y, ic, ib);
3114 }
3115 xdrawcursor();
3116 }
3117
3118 void
3119 expose(XEvent *ev) {
3120 XExposeEvent *e = &ev->xexpose;
3121
3122 if(xw.state & WIN_REDRAW) {
3123 if(!e->count)
3124 xw.state &= ~WIN_REDRAW;
3125 }
3126 redraw(0);
3127 }
3128
3129 void
3130 visibility(XEvent *ev) {
3131 XVisibilityEvent *e = &ev->xvisibility;
3132
3133 if(e->state == VisibilityFullyObscured) {
3134 xw.state &= ~WIN_VISIBLE;
3135 } else if(!(xw.state & WIN_VISIBLE)) {
3136 /* need a full redraw for next Expose, not just a buf copy */
3137 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3138 }
3139 }
3140
3141 void
3142 unmap(XEvent *ev) {
3143 xw.state &= ~WIN_VISIBLE;
3144 }
3145
3146 void
3147 xseturgency(int add) {
3148 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3149
3150 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
3151 XSetWMHints(xw.dpy, xw.win, h);
3152 XFree(h);
3153 }
3154
3155 void
3156 focus(XEvent *ev) {
3157 XFocusChangeEvent *e = &ev->xfocus;
3158
3159 if(e->mode == NotifyGrab)
3160 return;
3161
3162 if(ev->type == FocusIn) {
3163 XSetICFocus(xw.xic);
3164 xw.state |= WIN_FOCUSED;
3165 xseturgency(0);
3166 } else {
3167 XUnsetICFocus(xw.xic);
3168 xw.state &= ~WIN_FOCUSED;
3169 }
3170 }
3171
3172 inline bool
3173 match(uint mask, uint state) {
3174 state &= ~(ignoremod);
3175
3176 if(mask == XK_NO_MOD && state)
3177 return false;
3178 if(mask != XK_ANY_MOD && mask != XK_NO_MOD && !state)
3179 return false;
3180 if((state & mask) != state)
3181 return false;
3182 return true;
3183 }
3184
3185 void
3186 numlock(const Arg *dummy) {
3187 term.numlock ^= 1;
3188 }
3189
3190 char*
3191 kmap(KeySym k, uint state) {
3192 uint mask;
3193 Key *kp;
3194 int i;
3195
3196 /* Check for mapped keys out of X11 function keys. */
3197 for(i = 0; i < LEN(mappedkeys); i++) {
3198 if(mappedkeys[i] == k)
3199 break;
3200 }
3201 if(i == LEN(mappedkeys)) {
3202 if((k & 0xFFFF) < 0xFD00)
3203 return NULL;
3204 }
3205
3206 for(kp = key; kp < key + LEN(key); kp++) {
3207 mask = kp->mask;
3208
3209 if(kp->k != k)
3210 continue;
3211
3212 if(!match(mask, state))
3213 continue;
3214
3215 if(kp->appkey > 0) {
3216 if(!IS_SET(MODE_APPKEYPAD))
3217 continue;
3218 if(term.numlock && kp->appkey == 2)
3219 continue;
3220 } else if(kp->appkey < 0 && IS_SET(MODE_APPKEYPAD)) {
3221 continue;
3222 }
3223
3224 if((kp->appcursor < 0 && IS_SET(MODE_APPCURSOR)) ||
3225 (kp->appcursor > 0
3226 && !IS_SET(MODE_APPCURSOR))) {
3227 continue;
3228 }
3229
3230 if((kp->crlf < 0 && IS_SET(MODE_CRLF)) ||
3231 (kp->crlf > 0 && !IS_SET(MODE_CRLF))) {
3232 continue;
3233 }
3234
3235 return kp->s;
3236 }
3237
3238 return NULL;
3239 }
3240
3241 void
3242 kpress(XEvent *ev) {
3243 XKeyEvent *e = &ev->xkey;
3244 KeySym ksym;
3245 char xstr[31], buf[32], *customkey, *cp = buf;
3246 int len, ret;
3247 long c;
3248 Status status;
3249 Shortcut *bp;
3250
3251 if(IS_SET(MODE_KBDLOCK))
3252 return;
3253
3254 len = XmbLookupString(xw.xic, e, xstr, sizeof(xstr), &ksym, &status);
3255 e->state &= ~Mod2Mask;
3256 /* 1. shortcuts */
3257 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3258 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3259 bp->func(&(bp->arg));
3260 return;
3261 }
3262 }
3263
3264 /* 2. custom keys from config.h */
3265 if((customkey = kmap(ksym, e->state))) {
3266 len = strlen(customkey);
3267 memcpy(buf, customkey, len);
3268 /* 3. hardcoded (overrides X lookup) */
3269 } else {
3270 if(len == 0)
3271 return;
3272
3273 if(len == 1 && e->state & Mod1Mask) {
3274 if(IS_SET(MODE_8BIT)) {
3275 if(*xstr < 0177) {
3276 c = *xstr | B7;
3277 ret = utf8encode(&c, cp);
3278 cp += ret;
3279 len = 0;
3280 }
3281 } else {
3282 *cp++ = '\033';
3283 }
3284 }
3285
3286 memcpy(cp, xstr, len);
3287 len = cp - buf + len;
3288 }
3289
3290 ttywrite(buf, len);
3291 if(IS_SET(MODE_ECHO))
3292 techo(buf, len);
3293 }
3294
3295
3296 void
3297 cmessage(XEvent *e) {
3298 /*
3299 * See xembed specs
3300 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3301 */
3302 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3303 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3304 xw.state |= WIN_FOCUSED;
3305 xseturgency(0);
3306 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3307 xw.state &= ~WIN_FOCUSED;
3308 }
3309 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3310 /* Send SIGHUP to shell */
3311 kill(pid, SIGHUP);
3312 exit(EXIT_SUCCESS);
3313 }
3314 }
3315
3316 void
3317 cresize(int width, int height) {
3318 int col, row;
3319
3320 if(width != 0)
3321 xw.w = width;
3322 if(height != 0)
3323 xw.h = height;
3324
3325 col = (xw.w - 2 * borderpx) / xw.cw;
3326 row = (xw.h - 2 * borderpx) / xw.ch;
3327
3328 tresize(col, row);
3329 xresize(col, row);
3330 ttyresize();
3331 }
3332
3333 void
3334 resize(XEvent *e) {
3335 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3336 return;
3337
3338 cresize(e->xconfigure.width, e->xconfigure.height);
3339 }
3340
3341 void
3342 run(void) {
3343 XEvent ev;
3344 fd_set rfd;
3345 int xfd = XConnectionNumber(xw.dpy), xev;
3346 struct timeval drawtimeout, *tv = NULL, now, last;
3347
3348 gettimeofday(&last, NULL);
3349
3350 for(xev = actionfps;;) {
3351 FD_ZERO(&rfd);
3352 FD_SET(cmdfd, &rfd);
3353 FD_SET(xfd, &rfd);
3354 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
3355 if(errno == EINTR)
3356 continue;
3357 die("select failed: %s\n", SERRNO);
3358 }
3359
3360 gettimeofday(&now, NULL);
3361 drawtimeout.tv_sec = 0;
3362 drawtimeout.tv_usec = (1000/xfps) * 1000;
3363 tv = &drawtimeout;
3364
3365 if(FD_ISSET(cmdfd, &rfd))
3366 ttyread();
3367
3368 if(FD_ISSET(xfd, &rfd))
3369 xev = actionfps;
3370
3371 if(TIMEDIFF(now, last) > \
3372 (xev ? (1000/xfps) : (1000/actionfps))) {
3373 while(XPending(xw.dpy)) {
3374 XNextEvent(xw.dpy, &ev);
3375 if(XFilterEvent(&ev, None))
3376 continue;
3377 if(handler[ev.type])
3378 (handler[ev.type])(&ev);
3379 }
3380
3381 draw();
3382 XFlush(xw.dpy);
3383 last = now;
3384
3385 if(xev && !FD_ISSET(xfd, &rfd))
3386 xev--;
3387 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd))
3388 tv = NULL;
3389 }
3390 }
3391 }
3392
3393 void
3394 usage(void) {
3395 die("%s " VERSION " (c) 2010-2013 st engineers\n" \
3396 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]" \
3397 " [-t title] [-w windowid] [-e command ...]\n", argv0);
3398 }
3399
3400 int
3401 main(int argc, char *argv[]) {
3402 int bitm, xr, yr;
3403 uint wr, hr;
3404
3405 xw.fw = xw.fh = xw.fx = xw.fy = 0;
3406 xw.isfixed = False;
3407
3408 ARGBEGIN {
3409 case 'a':
3410 allowaltscreen = false;
3411 break;
3412 case 'c':
3413 opt_class = EARGF(usage());
3414 break;
3415 case 'e':
3416 /* eat all remaining arguments */
3417 if(argc > 1)
3418 opt_cmd = &argv[1];
3419 goto run;
3420 case 'f':
3421 opt_font = EARGF(usage());
3422 break;
3423 case 'g':
3424 bitm = XParseGeometry(EARGF(usage()), &xr, &yr, &wr, &hr);
3425 if(bitm & XValue)
3426 xw.fx = xr;
3427 if(bitm & YValue)
3428 xw.fy = yr;
3429 if(bitm & WidthValue)
3430 xw.fw = (int)wr;
3431 if(bitm & HeightValue)
3432 xw.fh = (int)hr;
3433 if(bitm & XNegative && xw.fx == 0)
3434 xw.fx = -1;
3435 if(bitm & XNegative && xw.fy == 0)
3436 xw.fy = -1;
3437
3438 if(xw.fh != 0 && xw.fw != 0)
3439 xw.isfixed = True;
3440 break;
3441 case 'o':
3442 opt_io = EARGF(usage());
3443 break;
3444 case 't':
3445 opt_title = EARGF(usage());
3446 break;
3447 case 'w':
3448 opt_embed = EARGF(usage());
3449 break;
3450 case 'v':
3451 default:
3452 usage();
3453 } ARGEND;
3454
3455 run:
3456 setlocale(LC_CTYPE, "");
3457 XSetLocaleModifiers("");
3458 tnew(80, 24);
3459 xinit();
3460 ttynew();
3461 selinit();
3462 if(xw.isfixed)
3463 cresize(xw.h, xw.w);
3464 run();
3465
3466 return 0;
3467 }
3468