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Fixing the selection handling to allow one char selection.
[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 * If the user clicks below predefined timeouts specific
789 * snapping behaviour is exposed.
790 */
791 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
792 sel.snap = SNAP_LINE;
793 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
794 sel.snap = SNAP_WORD;
795 } else {
796 sel.snap = 0;
797 }
798 selsnap(sel.snap, &sel.bx, &sel.by, -1);
799 selsnap(sel.snap, &sel.ex, &sel.ey, 1);
800 sel.b.x = sel.bx;
801 sel.b.y = sel.by;
802 sel.e.x = sel.ex;
803 sel.e.y = sel.ey;
804
805 /*
806 * Draw selection, unless it's regular and we don't want to
807 * make clicks visible
808 */
809 if(sel.snap != 0) {
810 sel.mode++;
811 tsetdirt(sel.b.y, sel.e.y);
812 draw();
813 }
814 sel.tclick2 = sel.tclick1;
815 sel.tclick1 = now;
816 } else if(e->xbutton.button == Button4) {
817 ttywrite("\031", 1);
818 } else if(e->xbutton.button == Button5) {
819 ttywrite("\005", 1);
820 }
821 }
822
823 void
824 selcopy(void) {
825 char *str, *ptr;
826 int x, y, bufsize, size;
827 Glyph *gp, *last;
828
829 if(sel.bx == -1) {
830 str = NULL;
831 } else {
832 bufsize = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
833 ptr = str = xmalloc(bufsize);
834
835 /* append every set & selected glyph to the selection */
836 for(y = sel.b.y; y < sel.e.y + 1; y++) {
837 gp = &term.line[y][0];
838 last = gp + term.col;
839
840 while(--last >= gp && !(selected(last - gp, y) && \
841 strcmp(last->c, " ") != 0))
842 /* nothing */;
843
844 for(x = 0; gp <= last; x++, ++gp) {
845 if(!selected(x, y))
846 continue;
847
848 size = utf8size(gp->c);
849 memcpy(ptr, gp->c, size);
850 ptr += size;
851 }
852
853 /*
854 * Copy and pasting of line endings is inconsistent
855 * in the inconsistent terminal and GUI world.
856 * The best solution seems like to produce '\n' when
857 * something is copied from st and convert '\n' to
858 * '\r', when something to be pasted is received by
859 * st.
860 * FIXME: Fix the computer world.
861 */
862 if(y < sel.e.y && !((gp-1)->mode & ATTR_WRAP))
863 *ptr++ = '\n';
864 }
865 *ptr = 0;
866 }
867 xsetsel(str);
868 }
869
870 void
871 selnotify(XEvent *e) {
872 ulong nitems, ofs, rem;
873 int format;
874 uchar *data, *last, *repl;
875 Atom type;
876
877 ofs = 0;
878 do {
879 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
880 False, AnyPropertyType, &type, &format,
881 &nitems, &rem, &data)) {
882 fprintf(stderr, "Clipboard allocation failed\n");
883 return;
884 }
885
886 /*
887 * As seen in selcopy:
888 * Line endings are inconsistent in the terminal and GUI world
889 * copy and pasting. When receiving some selection data,
890 * replace all '\n' with '\r'.
891 * FIXME: Fix the computer world.
892 */
893 repl = data;
894 last = data + nitems * format / 8;
895 while((repl = memchr(repl, '\n', last - repl))) {
896 *repl++ = '\r';
897 }
898
899 ttywrite((const char *)data, nitems * format / 8);
900 XFree(data);
901 /* number of 32-bit chunks returned */
902 ofs += nitems * format / 32;
903 } while(rem > 0);
904 }
905
906 void
907 selpaste(const Arg *dummy) {
908 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
909 xw.win, CurrentTime);
910 }
911
912 void
913 clippaste(const Arg *dummy) {
914 Atom clipboard;
915
916 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
917 XConvertSelection(xw.dpy, clipboard, sel.xtarget, XA_PRIMARY,
918 xw.win, CurrentTime);
919 }
920
921 void
922 selclear(XEvent *e) {
923 if(sel.bx == -1)
924 return;
925 sel.bx = -1;
926 tsetdirt(sel.b.y, sel.e.y);
927 }
928
929 void
930 selrequest(XEvent *e) {
931 XSelectionRequestEvent *xsre;
932 XSelectionEvent xev;
933 Atom xa_targets, string;
934
935 xsre = (XSelectionRequestEvent *) e;
936 xev.type = SelectionNotify;
937 xev.requestor = xsre->requestor;
938 xev.selection = xsre->selection;
939 xev.target = xsre->target;
940 xev.time = xsre->time;
941 /* reject */
942 xev.property = None;
943
944 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
945 if(xsre->target == xa_targets) {
946 /* respond with the supported type */
947 string = sel.xtarget;
948 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
949 XA_ATOM, 32, PropModeReplace,
950 (uchar *) &string, 1);
951 xev.property = xsre->property;
952 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
953 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
954 xsre->target, 8, PropModeReplace,
955 (uchar *) sel.clip, strlen(sel.clip));
956 xev.property = xsre->property;
957 }
958
959 /* all done, send a notification to the listener */
960 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
961 fprintf(stderr, "Error sending SelectionNotify event\n");
962 }
963
964 void
965 xsetsel(char *str) {
966 /* register the selection for both the clipboard and the primary */
967 Atom clipboard;
968
969 free(sel.clip);
970 sel.clip = str;
971
972 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
973
974 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
975 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
976 }
977
978 void
979 brelease(XEvent *e) {
980 if(IS_SET(MODE_MOUSE)) {
981 mousereport(e);
982 return;
983 }
984
985 if(e->xbutton.button == Button2) {
986 selpaste(NULL);
987 } else if(e->xbutton.button == Button1) {
988 if(sel.mode < 2) {
989 sel.bx = -1;
990 } else {
991 getbuttoninfo(e);
992 selcopy();
993 }
994 sel.mode = 0;
995 term.dirty[sel.ey] = 1;
996 }
997 }
998
999 void
1000 bmotion(XEvent *e) {
1001 int oldey, oldex, oldsby, oldsey;
1002
1003 if(IS_SET(MODE_MOUSE)) {
1004 mousereport(e);
1005 return;
1006 }
1007
1008 if(!sel.mode)
1009 return;
1010
1011 sel.mode++;
1012 oldey = sel.ey;
1013 oldex = sel.ex;
1014 oldsby = sel.b.y;
1015 oldsey = sel.e.y;
1016 getbuttoninfo(e);
1017
1018 if(oldey != sel.ey || oldex != sel.ex) {
1019 tsetdirt(MIN(sel.b.y, oldsby), MAX(sel.e.y, oldsey));
1020 }
1021 }
1022
1023 void
1024 die(const char *errstr, ...) {
1025 va_list ap;
1026
1027 va_start(ap, errstr);
1028 vfprintf(stderr, errstr, ap);
1029 va_end(ap);
1030 exit(EXIT_FAILURE);
1031 }
1032
1033 void
1034 execsh(void) {
1035 char **args;
1036 char *envshell = getenv("SHELL");
1037 const struct passwd *pass = getpwuid(getuid());
1038 char buf[sizeof(long) * 8 + 1];
1039
1040 unsetenv("COLUMNS");
1041 unsetenv("LINES");
1042 unsetenv("TERMCAP");
1043
1044 if(pass) {
1045 setenv("LOGNAME", pass->pw_name, 1);
1046 setenv("USER", pass->pw_name, 1);
1047 setenv("SHELL", pass->pw_shell, 0);
1048 setenv("HOME", pass->pw_dir, 0);
1049 }
1050
1051 snprintf(buf, sizeof(buf), "%lu", xw.win);
1052 setenv("WINDOWID", buf, 1);
1053
1054 signal(SIGCHLD, SIG_DFL);
1055 signal(SIGHUP, SIG_DFL);
1056 signal(SIGINT, SIG_DFL);
1057 signal(SIGQUIT, SIG_DFL);
1058 signal(SIGTERM, SIG_DFL);
1059 signal(SIGALRM, SIG_DFL);
1060
1061 DEFAULT(envshell, shell);
1062 setenv("TERM", termname, 1);
1063 args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
1064 execvp(args[0], args);
1065 exit(EXIT_FAILURE);
1066 }
1067
1068 void
1069 sigchld(int a) {
1070 int stat = 0;
1071
1072 if(waitpid(pid, &stat, 0) < 0)
1073 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
1074
1075 if(WIFEXITED(stat)) {
1076 exit(WEXITSTATUS(stat));
1077 } else {
1078 exit(EXIT_FAILURE);
1079 }
1080 }
1081
1082 void
1083 ttynew(void) {
1084 int m, s;
1085 struct winsize w = {term.row, term.col, 0, 0};
1086
1087 /* seems to work fine on linux, openbsd and freebsd */
1088 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1089 die("openpty failed: %s\n", SERRNO);
1090
1091 switch(pid = fork()) {
1092 case -1:
1093 die("fork failed\n");
1094 break;
1095 case 0:
1096 setsid(); /* create a new process group */
1097 dup2(s, STDIN_FILENO);
1098 dup2(s, STDOUT_FILENO);
1099 dup2(s, STDERR_FILENO);
1100 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1101 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
1102 close(s);
1103 close(m);
1104 execsh();
1105 break;
1106 default:
1107 close(s);
1108 cmdfd = m;
1109 signal(SIGCHLD, sigchld);
1110 if(opt_io) {
1111 iofd = (!strcmp(opt_io, "-")) ?
1112 STDOUT_FILENO :
1113 open(opt_io, O_WRONLY | O_CREAT, 0666);
1114 if(iofd < 0) {
1115 fprintf(stderr, "Error opening %s:%s\n",
1116 opt_io, strerror(errno));
1117 }
1118 }
1119 }
1120 }
1121
1122 void
1123 dump(char c) {
1124 static int col;
1125
1126 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
1127 if(++col % 10 == 0)
1128 fprintf(stderr, "\n");
1129 }
1130
1131 void
1132 ttyread(void) {
1133 static char buf[BUFSIZ];
1134 static int buflen = 0;
1135 char *ptr;
1136 char s[UTF_SIZ];
1137 int charsize; /* size of utf8 char in bytes */
1138 long utf8c;
1139 int ret;
1140
1141 /* append read bytes to unprocessed bytes */
1142 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1143 die("Couldn't read from shell: %s\n", SERRNO);
1144
1145 /* process every complete utf8 char */
1146 buflen += ret;
1147 ptr = buf;
1148 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
1149 charsize = utf8decode(ptr, &utf8c);
1150 utf8encode(&utf8c, s);
1151 tputc(s, charsize);
1152 ptr += charsize;
1153 buflen -= charsize;
1154 }
1155
1156 /* keep any uncomplete utf8 char for the next call */
1157 memmove(buf, ptr, buflen);
1158 }
1159
1160 void
1161 ttywrite(const char *s, size_t n) {
1162 if(write(cmdfd, s, n) == -1)
1163 die("write error on tty: %s\n", SERRNO);
1164 }
1165
1166 void
1167 ttyresize(void) {
1168 struct winsize w;
1169
1170 w.ws_row = term.row;
1171 w.ws_col = term.col;
1172 w.ws_xpixel = xw.tw;
1173 w.ws_ypixel = xw.th;
1174 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1175 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
1176 }
1177
1178 void
1179 tsetdirt(int top, int bot) {
1180 int i;
1181
1182 LIMIT(top, 0, term.row-1);
1183 LIMIT(bot, 0, term.row-1);
1184
1185 for(i = top; i <= bot; i++)
1186 term.dirty[i] = 1;
1187 }
1188
1189 void
1190 tfulldirt(void) {
1191 tsetdirt(0, term.row-1);
1192 }
1193
1194 void
1195 tcursor(int mode) {
1196 static TCursor c;
1197
1198 if(mode == CURSOR_SAVE) {
1199 c = term.c;
1200 } else if(mode == CURSOR_LOAD) {
1201 term.c = c;
1202 tmoveto(c.x, c.y);
1203 }
1204 }
1205
1206 void
1207 treset(void) {
1208 uint i;
1209
1210 term.c = (TCursor){{
1211 .mode = ATTR_NULL,
1212 .fg = defaultfg,
1213 .bg = defaultbg
1214 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1215
1216 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1217 for(i = tabspaces; i < term.col; i += tabspaces)
1218 term.tabs[i] = 1;
1219 term.top = 0;
1220 term.bot = term.row - 1;
1221 term.mode = MODE_WRAP;
1222
1223 tclearregion(0, 0, term.col-1, term.row-1);
1224 tmoveto(0, 0);
1225 tcursor(CURSOR_SAVE);
1226 }
1227
1228 void
1229 tnew(int col, int row) {
1230 memset(&term, 0, sizeof(Term));
1231 tresize(col, row);
1232 term.numlock = 1;
1233
1234 treset();
1235 }
1236
1237 void
1238 tswapscreen(void) {
1239 Line *tmp = term.line;
1240
1241 term.line = term.alt;
1242 term.alt = tmp;
1243 term.mode ^= MODE_ALTSCREEN;
1244 tfulldirt();
1245 }
1246
1247 void
1248 tscrolldown(int orig, int n) {
1249 int i;
1250 Line temp;
1251
1252 LIMIT(n, 0, term.bot-orig+1);
1253
1254 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1255
1256 for(i = term.bot; i >= orig+n; i--) {
1257 temp = term.line[i];
1258 term.line[i] = term.line[i-n];
1259 term.line[i-n] = temp;
1260
1261 term.dirty[i] = 1;
1262 term.dirty[i-n] = 1;
1263 }
1264
1265 selscroll(orig, n);
1266 }
1267
1268 void
1269 tscrollup(int orig, int n) {
1270 int i;
1271 Line temp;
1272 LIMIT(n, 0, term.bot-orig+1);
1273
1274 tclearregion(0, orig, term.col-1, orig+n-1);
1275
1276 for(i = orig; i <= term.bot-n; i++) {
1277 temp = term.line[i];
1278 term.line[i] = term.line[i+n];
1279 term.line[i+n] = temp;
1280
1281 term.dirty[i] = 1;
1282 term.dirty[i+n] = 1;
1283 }
1284
1285 selscroll(orig, -n);
1286 }
1287
1288 void
1289 selscroll(int orig, int n) {
1290 if(sel.bx == -1)
1291 return;
1292
1293 if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
1294 if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
1295 sel.bx = -1;
1296 return;
1297 }
1298 if(sel.type == SEL_RECTANGULAR) {
1299 if(sel.by < term.top)
1300 sel.by = term.top;
1301 if(sel.ey > term.bot)
1302 sel.ey = term.bot;
1303 } else {
1304 if(sel.by < term.top) {
1305 sel.by = term.top;
1306 sel.bx = 0;
1307 }
1308 if(sel.ey > term.bot) {
1309 sel.ey = term.bot;
1310 sel.ex = term.col;
1311 }
1312 }
1313 sel.b.y = sel.by, sel.b.x = sel.bx;
1314 sel.e.y = sel.ey, sel.e.x = sel.ex;
1315 }
1316 }
1317
1318 void
1319 tnewline(int first_col) {
1320 int y = term.c.y;
1321
1322 if(y == term.bot) {
1323 tscrollup(term.top, 1);
1324 } else {
1325 y++;
1326 }
1327 tmoveto(first_col ? 0 : term.c.x, y);
1328 }
1329
1330 void
1331 csiparse(void) {
1332 char *p = csiescseq.buf, *np;
1333 long int v;
1334
1335 csiescseq.narg = 0;
1336 if(*p == '?') {
1337 csiescseq.priv = 1;
1338 p++;
1339 }
1340
1341 csiescseq.buf[csiescseq.len] = '\0';
1342 while(p < csiescseq.buf+csiescseq.len) {
1343 np = NULL;
1344 v = strtol(p, &np, 10);
1345 if(np == p)
1346 v = 0;
1347 if(v == LONG_MAX || v == LONG_MIN)
1348 v = -1;
1349 csiescseq.arg[csiescseq.narg++] = v;
1350 p = np;
1351 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1352 break;
1353 p++;
1354 }
1355 csiescseq.mode = *p;
1356 }
1357
1358 /* for absolute user moves, when decom is set */
1359 void
1360 tmoveato(int x, int y) {
1361 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1362 }
1363
1364 void
1365 tmoveto(int x, int y) {
1366 int miny, maxy;
1367
1368 if(term.c.state & CURSOR_ORIGIN) {
1369 miny = term.top;
1370 maxy = term.bot;
1371 } else {
1372 miny = 0;
1373 maxy = term.row - 1;
1374 }
1375 LIMIT(x, 0, term.col-1);
1376 LIMIT(y, miny, maxy);
1377 term.c.state &= ~CURSOR_WRAPNEXT;
1378 term.c.x = x;
1379 term.c.y = y;
1380 }
1381
1382 void
1383 tsetchar(char *c, Glyph *attr, int x, int y) {
1384 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1385 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1386 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1387 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1388 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1389 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1390 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1391 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1392 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1393 };
1394
1395 /*
1396 * The table is proudly stolen from rxvt.
1397 */
1398 if(attr->mode & ATTR_GFX) {
1399 if(c[0] >= 0x41 && c[0] <= 0x7e
1400 && vt100_0[c[0] - 0x41]) {
1401 c = vt100_0[c[0] - 0x41];
1402 }
1403 }
1404
1405 term.dirty[y] = 1;
1406 term.line[y][x] = *attr;
1407 memcpy(term.line[y][x].c, c, UTF_SIZ);
1408 }
1409
1410 void
1411 tclearregion(int x1, int y1, int x2, int y2) {
1412 int x, y, temp;
1413
1414 if(x1 > x2)
1415 temp = x1, x1 = x2, x2 = temp;
1416 if(y1 > y2)
1417 temp = y1, y1 = y2, y2 = temp;
1418
1419 LIMIT(x1, 0, term.col-1);
1420 LIMIT(x2, 0, term.col-1);
1421 LIMIT(y1, 0, term.row-1);
1422 LIMIT(y2, 0, term.row-1);
1423
1424 for(y = y1; y <= y2; y++) {
1425 term.dirty[y] = 1;
1426 for(x = x1; x <= x2; x++) {
1427 if(selected(x, y))
1428 selclear(NULL);
1429 term.line[y][x] = term.c.attr;
1430 memcpy(term.line[y][x].c, " ", 2);
1431 }
1432 }
1433 }
1434
1435 void
1436 tdeletechar(int n) {
1437 int src = term.c.x + n;
1438 int dst = term.c.x;
1439 int size = term.col - src;
1440
1441 term.dirty[term.c.y] = 1;
1442
1443 if(src >= term.col) {
1444 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1445 return;
1446 }
1447
1448 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1449 size * sizeof(Glyph));
1450 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1451 }
1452
1453 void
1454 tinsertblank(int n) {
1455 int src = term.c.x;
1456 int dst = src + n;
1457 int size = term.col - dst;
1458
1459 term.dirty[term.c.y] = 1;
1460
1461 if(dst >= term.col) {
1462 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1463 return;
1464 }
1465
1466 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1467 size * sizeof(Glyph));
1468 tclearregion(src, term.c.y, dst - 1, term.c.y);
1469 }
1470
1471 void
1472 tinsertblankline(int n) {
1473 if(term.c.y < term.top || term.c.y > term.bot)
1474 return;
1475
1476 tscrolldown(term.c.y, n);
1477 }
1478
1479 void
1480 tdeleteline(int n) {
1481 if(term.c.y < term.top || term.c.y > term.bot)
1482 return;
1483
1484 tscrollup(term.c.y, n);
1485 }
1486
1487 void
1488 tsetattr(int *attr, int l) {
1489 int i;
1490
1491 for(i = 0; i < l; i++) {
1492 switch(attr[i]) {
1493 case 0:
1494 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE \
1495 | ATTR_BOLD | ATTR_ITALIC \
1496 | ATTR_BLINK);
1497 term.c.attr.fg = defaultfg;
1498 term.c.attr.bg = defaultbg;
1499 break;
1500 case 1:
1501 term.c.attr.mode |= ATTR_BOLD;
1502 break;
1503 case 3:
1504 term.c.attr.mode |= ATTR_ITALIC;
1505 break;
1506 case 4:
1507 term.c.attr.mode |= ATTR_UNDERLINE;
1508 break;
1509 case 5: /* slow blink */
1510 case 6: /* rapid blink */
1511 term.c.attr.mode |= ATTR_BLINK;
1512 break;
1513 case 7:
1514 term.c.attr.mode |= ATTR_REVERSE;
1515 break;
1516 case 21:
1517 case 22:
1518 term.c.attr.mode &= ~ATTR_BOLD;
1519 break;
1520 case 23:
1521 term.c.attr.mode &= ~ATTR_ITALIC;
1522 break;
1523 case 24:
1524 term.c.attr.mode &= ~ATTR_UNDERLINE;
1525 break;
1526 case 25:
1527 case 26:
1528 term.c.attr.mode &= ~ATTR_BLINK;
1529 break;
1530 case 27:
1531 term.c.attr.mode &= ~ATTR_REVERSE;
1532 break;
1533 case 38:
1534 if(i + 2 < l && attr[i + 1] == 5) {
1535 i += 2;
1536 if(BETWEEN(attr[i], 0, 255)) {
1537 term.c.attr.fg = attr[i];
1538 } else {
1539 fprintf(stderr,
1540 "erresc: bad fgcolor %d\n",
1541 attr[i]);
1542 }
1543 } else {
1544 fprintf(stderr,
1545 "erresc(38): gfx attr %d unknown\n",
1546 attr[i]);
1547 }
1548 break;
1549 case 39:
1550 term.c.attr.fg = defaultfg;
1551 break;
1552 case 48:
1553 if(i + 2 < l && attr[i + 1] == 5) {
1554 i += 2;
1555 if(BETWEEN(attr[i], 0, 255)) {
1556 term.c.attr.bg = attr[i];
1557 } else {
1558 fprintf(stderr,
1559 "erresc: bad bgcolor %d\n",
1560 attr[i]);
1561 }
1562 } else {
1563 fprintf(stderr,
1564 "erresc(48): gfx attr %d unknown\n",
1565 attr[i]);
1566 }
1567 break;
1568 case 49:
1569 term.c.attr.bg = defaultbg;
1570 break;
1571 default:
1572 if(BETWEEN(attr[i], 30, 37)) {
1573 term.c.attr.fg = attr[i] - 30;
1574 } else if(BETWEEN(attr[i], 40, 47)) {
1575 term.c.attr.bg = attr[i] - 40;
1576 } else if(BETWEEN(attr[i], 90, 97)) {
1577 term.c.attr.fg = attr[i] - 90 + 8;
1578 } else if(BETWEEN(attr[i], 100, 107)) {
1579 term.c.attr.bg = attr[i] - 100 + 8;
1580 } else {
1581 fprintf(stderr,
1582 "erresc(default): gfx attr %d unknown\n",
1583 attr[i]), csidump();
1584 }
1585 break;
1586 }
1587 }
1588 }
1589
1590 void
1591 tsetscroll(int t, int b) {
1592 int temp;
1593
1594 LIMIT(t, 0, term.row-1);
1595 LIMIT(b, 0, term.row-1);
1596 if(t > b) {
1597 temp = t;
1598 t = b;
1599 b = temp;
1600 }
1601 term.top = t;
1602 term.bot = b;
1603 }
1604
1605 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1606
1607 void
1608 tsetmode(bool priv, bool set, int *args, int narg) {
1609 int *lim, mode;
1610 bool alt;
1611
1612 for(lim = args + narg; args < lim; ++args) {
1613 if(priv) {
1614 switch(*args) {
1615 break;
1616 case 1: /* DECCKM -- Cursor key */
1617 MODBIT(term.mode, set, MODE_APPCURSOR);
1618 break;
1619 case 5: /* DECSCNM -- Reverse video */
1620 mode = term.mode;
1621 MODBIT(term.mode, set, MODE_REVERSE);
1622 if(mode != term.mode)
1623 redraw(REDRAW_TIMEOUT);
1624 break;
1625 case 6: /* DECOM -- Origin */
1626 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1627 tmoveato(0, 0);
1628 break;
1629 case 7: /* DECAWM -- Auto wrap */
1630 MODBIT(term.mode, set, MODE_WRAP);
1631 break;
1632 case 0: /* Error (IGNORED) */
1633 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1634 case 3: /* DECCOLM -- Column (IGNORED) */
1635 case 4: /* DECSCLM -- Scroll (IGNORED) */
1636 case 8: /* DECARM -- Auto repeat (IGNORED) */
1637 case 18: /* DECPFF -- Printer feed (IGNORED) */
1638 case 19: /* DECPEX -- Printer extent (IGNORED) */
1639 case 42: /* DECNRCM -- National characters (IGNORED) */
1640 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1641 break;
1642 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1643 MODBIT(term.mode, !set, MODE_HIDE);
1644 break;
1645 case 1000: /* 1000,1002: enable xterm mouse report */
1646 MODBIT(term.mode, set, MODE_MOUSEBTN);
1647 MODBIT(term.mode, 0, MODE_MOUSEMOTION);
1648 break;
1649 case 1002:
1650 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1651 MODBIT(term.mode, 0, MODE_MOUSEBTN);
1652 break;
1653 case 1006:
1654 MODBIT(term.mode, set, MODE_MOUSESGR);
1655 break;
1656 case 1034:
1657 MODBIT(term.mode, set, MODE_8BIT);
1658 break;
1659 case 1049: /* = 1047 and 1048 */
1660 case 47:
1661 case 1047:
1662 if (!allowaltscreen)
1663 break;
1664
1665 alt = IS_SET(MODE_ALTSCREEN);
1666 if(alt) {
1667 tclearregion(0, 0, term.col-1,
1668 term.row-1);
1669 }
1670 if(set ^ alt) /* set is always 1 or 0 */
1671 tswapscreen();
1672 if(*args != 1049)
1673 break;
1674 /* FALLTRU */
1675 case 1048:
1676 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1677 break;
1678 default:
1679 fprintf(stderr,
1680 "erresc: unknown private set/reset mode %d\n",
1681 *args);
1682 break;
1683 }
1684 } else {
1685 switch(*args) {
1686 case 0: /* Error (IGNORED) */
1687 break;
1688 case 2: /* KAM -- keyboard action */
1689 MODBIT(term.mode, set, MODE_KBDLOCK);
1690 break;
1691 case 4: /* IRM -- Insertion-replacement */
1692 MODBIT(term.mode, set, MODE_INSERT);
1693 break;
1694 case 12: /* SRM -- Send/Receive */
1695 MODBIT(term.mode, !set, MODE_ECHO);
1696 break;
1697 case 20: /* LNM -- Linefeed/new line */
1698 MODBIT(term.mode, set, MODE_CRLF);
1699 break;
1700 default:
1701 fprintf(stderr,
1702 "erresc: unknown set/reset mode %d\n",
1703 *args);
1704 break;
1705 }
1706 }
1707 }
1708 }
1709 #undef MODBIT
1710
1711
1712 void
1713 csihandle(void) {
1714 switch(csiescseq.mode) {
1715 default:
1716 unknown:
1717 fprintf(stderr, "erresc: unknown csi ");
1718 csidump();
1719 /* die(""); */
1720 break;
1721 case '@': /* ICH -- Insert <n> blank char */
1722 DEFAULT(csiescseq.arg[0], 1);
1723 tinsertblank(csiescseq.arg[0]);
1724 break;
1725 case 'A': /* CUU -- Cursor <n> Up */
1726 DEFAULT(csiescseq.arg[0], 1);
1727 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1728 break;
1729 case 'B': /* CUD -- Cursor <n> Down */
1730 case 'e': /* VPR --Cursor <n> Down */
1731 DEFAULT(csiescseq.arg[0], 1);
1732 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1733 break;
1734 case 'c': /* DA -- Device Attributes */
1735 if(csiescseq.arg[0] == 0)
1736 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1737 break;
1738 case 'C': /* CUF -- Cursor <n> Forward */
1739 case 'a': /* HPR -- Cursor <n> Forward */
1740 DEFAULT(csiescseq.arg[0], 1);
1741 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1742 break;
1743 case 'D': /* CUB -- Cursor <n> Backward */
1744 DEFAULT(csiescseq.arg[0], 1);
1745 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1746 break;
1747 case 'E': /* CNL -- Cursor <n> Down and first col */
1748 DEFAULT(csiescseq.arg[0], 1);
1749 tmoveto(0, term.c.y+csiescseq.arg[0]);
1750 break;
1751 case 'F': /* CPL -- Cursor <n> Up and first col */
1752 DEFAULT(csiescseq.arg[0], 1);
1753 tmoveto(0, term.c.y-csiescseq.arg[0]);
1754 break;
1755 case 'g': /* TBC -- Tabulation clear */
1756 switch(csiescseq.arg[0]) {
1757 case 0: /* clear current tab stop */
1758 term.tabs[term.c.x] = 0;
1759 break;
1760 case 3: /* clear all the tabs */
1761 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1762 break;
1763 default:
1764 goto unknown;
1765 }
1766 break;
1767 case 'G': /* CHA -- Move to <col> */
1768 case '`': /* HPA */
1769 DEFAULT(csiescseq.arg[0], 1);
1770 tmoveto(csiescseq.arg[0]-1, term.c.y);
1771 break;
1772 case 'H': /* CUP -- Move to <row> <col> */
1773 case 'f': /* HVP */
1774 DEFAULT(csiescseq.arg[0], 1);
1775 DEFAULT(csiescseq.arg[1], 1);
1776 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1777 break;
1778 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1779 DEFAULT(csiescseq.arg[0], 1);
1780 while(csiescseq.arg[0]--)
1781 tputtab(1);
1782 break;
1783 case 'J': /* ED -- Clear screen */
1784 sel.bx = -1;
1785 switch(csiescseq.arg[0]) {
1786 case 0: /* below */
1787 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1788 if(term.c.y < term.row-1) {
1789 tclearregion(0, term.c.y+1, term.col-1,
1790 term.row-1);
1791 }
1792 break;
1793 case 1: /* above */
1794 if(term.c.y > 1)
1795 tclearregion(0, 0, term.col-1, term.c.y-1);
1796 tclearregion(0, term.c.y, term.c.x, term.c.y);
1797 break;
1798 case 2: /* all */
1799 tclearregion(0, 0, term.col-1, term.row-1);
1800 break;
1801 default:
1802 goto unknown;
1803 }
1804 break;
1805 case 'K': /* EL -- Clear line */
1806 switch(csiescseq.arg[0]) {
1807 case 0: /* right */
1808 tclearregion(term.c.x, term.c.y, term.col-1,
1809 term.c.y);
1810 break;
1811 case 1: /* left */
1812 tclearregion(0, term.c.y, term.c.x, term.c.y);
1813 break;
1814 case 2: /* all */
1815 tclearregion(0, term.c.y, term.col-1, term.c.y);
1816 break;
1817 }
1818 break;
1819 case 'S': /* SU -- Scroll <n> line up */
1820 DEFAULT(csiescseq.arg[0], 1);
1821 tscrollup(term.top, csiescseq.arg[0]);
1822 break;
1823 case 'T': /* SD -- Scroll <n> line down */
1824 DEFAULT(csiescseq.arg[0], 1);
1825 tscrolldown(term.top, csiescseq.arg[0]);
1826 break;
1827 case 'L': /* IL -- Insert <n> blank lines */
1828 DEFAULT(csiescseq.arg[0], 1);
1829 tinsertblankline(csiescseq.arg[0]);
1830 break;
1831 case 'l': /* RM -- Reset Mode */
1832 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
1833 break;
1834 case 'M': /* DL -- Delete <n> lines */
1835 DEFAULT(csiescseq.arg[0], 1);
1836 tdeleteline(csiescseq.arg[0]);
1837 break;
1838 case 'X': /* ECH -- Erase <n> char */
1839 DEFAULT(csiescseq.arg[0], 1);
1840 tclearregion(term.c.x, term.c.y,
1841 term.c.x + csiescseq.arg[0] - 1, term.c.y);
1842 break;
1843 case 'P': /* DCH -- Delete <n> char */
1844 DEFAULT(csiescseq.arg[0], 1);
1845 tdeletechar(csiescseq.arg[0]);
1846 break;
1847 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
1848 DEFAULT(csiescseq.arg[0], 1);
1849 while(csiescseq.arg[0]--)
1850 tputtab(0);
1851 break;
1852 case 'd': /* VPA -- Move to <row> */
1853 DEFAULT(csiescseq.arg[0], 1);
1854 tmoveato(term.c.x, csiescseq.arg[0]-1);
1855 break;
1856 case 'h': /* SM -- Set terminal mode */
1857 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
1858 break;
1859 case 'm': /* SGR -- Terminal attribute (color) */
1860 tsetattr(csiescseq.arg, csiescseq.narg);
1861 break;
1862 case 'r': /* DECSTBM -- Set Scrolling Region */
1863 if(csiescseq.priv) {
1864 goto unknown;
1865 } else {
1866 DEFAULT(csiescseq.arg[0], 1);
1867 DEFAULT(csiescseq.arg[1], term.row);
1868 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
1869 tmoveato(0, 0);
1870 }
1871 break;
1872 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1873 tcursor(CURSOR_SAVE);
1874 break;
1875 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1876 tcursor(CURSOR_LOAD);
1877 break;
1878 }
1879 }
1880
1881 void
1882 csidump(void) {
1883 int i;
1884 uint c;
1885
1886 printf("ESC[");
1887 for(i = 0; i < csiescseq.len; i++) {
1888 c = csiescseq.buf[i] & 0xff;
1889 if(isprint(c)) {
1890 putchar(c);
1891 } else if(c == '\n') {
1892 printf("(\\n)");
1893 } else if(c == '\r') {
1894 printf("(\\r)");
1895 } else if(c == 0x1b) {
1896 printf("(\\e)");
1897 } else {
1898 printf("(%02x)", c);
1899 }
1900 }
1901 putchar('\n');
1902 }
1903
1904 void
1905 csireset(void) {
1906 memset(&csiescseq, 0, sizeof(csiescseq));
1907 }
1908
1909 void
1910 strhandle(void) {
1911 char *p = NULL;
1912 int i, j, narg;
1913
1914 strparse();
1915 narg = strescseq.narg;
1916
1917 switch(strescseq.type) {
1918 case ']': /* OSC -- Operating System Command */
1919 switch(i = atoi(strescseq.args[0])) {
1920 case 0:
1921 case 1:
1922 case 2:
1923 if(narg > 1)
1924 xsettitle(strescseq.args[1]);
1925 break;
1926 case 4: /* color set */
1927 if(narg < 3)
1928 break;
1929 p = strescseq.args[2];
1930 /* fall through */
1931 case 104: /* color reset, here p = NULL */
1932 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
1933 if (!xsetcolorname(j, p)) {
1934 fprintf(stderr, "erresc: invalid color %s\n", p);
1935 } else {
1936 /*
1937 * TODO if defaultbg color is changed, borders
1938 * are dirty
1939 */
1940 redraw(0);
1941 }
1942 break;
1943 default:
1944 fprintf(stderr, "erresc: unknown str ");
1945 strdump();
1946 break;
1947 }
1948 break;
1949 case 'k': /* old title set compatibility */
1950 xsettitle(strescseq.args[0]);
1951 break;
1952 case 'P': /* DSC -- Device Control String */
1953 case '_': /* APC -- Application Program Command */
1954 case '^': /* PM -- Privacy Message */
1955 default:
1956 fprintf(stderr, "erresc: unknown str ");
1957 strdump();
1958 /* die(""); */
1959 break;
1960 }
1961 }
1962
1963 void
1964 strparse(void) {
1965 char *p = strescseq.buf;
1966
1967 strescseq.narg = 0;
1968 strescseq.buf[strescseq.len] = '\0';
1969 while(p && strescseq.narg < STR_ARG_SIZ)
1970 strescseq.args[strescseq.narg++] = strsep(&p, ";");
1971 }
1972
1973 void
1974 strdump(void) {
1975 int i;
1976 uint c;
1977
1978 printf("ESC%c", strescseq.type);
1979 for(i = 0; i < strescseq.len; i++) {
1980 c = strescseq.buf[i] & 0xff;
1981 if(c == '\0') {
1982 return;
1983 } else if(isprint(c)) {
1984 putchar(c);
1985 } else if(c == '\n') {
1986 printf("(\\n)");
1987 } else if(c == '\r') {
1988 printf("(\\r)");
1989 } else if(c == 0x1b) {
1990 printf("(\\e)");
1991 } else {
1992 printf("(%02x)", c);
1993 }
1994 }
1995 printf("ESC\\\n");
1996 }
1997
1998 void
1999 strreset(void) {
2000 memset(&strescseq, 0, sizeof(strescseq));
2001 }
2002
2003 void
2004 tputtab(bool forward) {
2005 uint x = term.c.x;
2006
2007 if(forward) {
2008 if(x == term.col)
2009 return;
2010 for(++x; x < term.col && !term.tabs[x]; ++x)
2011 /* nothing */ ;
2012 } else {
2013 if(x == 0)
2014 return;
2015 for(--x; x > 0 && !term.tabs[x]; --x)
2016 /* nothing */ ;
2017 }
2018 tmoveto(x, term.c.y);
2019 }
2020
2021 void
2022 techo(char *buf, int len) {
2023 for(; len > 0; buf++, len--) {
2024 char c = *buf;
2025
2026 if(c == '\033') { /* escape */
2027 tputc("^", 1);
2028 tputc("[", 1);
2029 } else if(c < '\x20') { /* control code */
2030 if(c != '\n' && c != '\r' && c != '\t') {
2031 c |= '\x40';
2032 tputc("^", 1);
2033 }
2034 tputc(&c, 1);
2035 } else {
2036 break;
2037 }
2038 }
2039 if(len)
2040 tputc(buf, len);
2041 }
2042
2043 void
2044 tputc(char *c, int len) {
2045 uchar ascii = *c;
2046 bool control = ascii < '\x20' || ascii == 0177;
2047
2048 if(iofd != -1) {
2049 if(xwrite(iofd, c, len) < 0) {
2050 fprintf(stderr, "Error writing in %s:%s\n",
2051 opt_io, strerror(errno));
2052 close(iofd);
2053 iofd = -1;
2054 }
2055 }
2056
2057 /*
2058 * STR sequences must be checked before anything else
2059 * because it can use some control codes as part of the sequence.
2060 */
2061 if(term.esc & ESC_STR) {
2062 switch(ascii) {
2063 case '\033':
2064 term.esc = ESC_START | ESC_STR_END;
2065 break;
2066 case '\a': /* backwards compatibility to xterm */
2067 term.esc = 0;
2068 strhandle();
2069 break;
2070 default:
2071 if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2072 memmove(&strescseq.buf[strescseq.len], c, len);
2073 strescseq.len += len;
2074 } else {
2075 /*
2076 * Here is a bug in terminals. If the user never sends
2077 * some code to stop the str or esc command, then st
2078 * will stop responding. But this is better than
2079 * silently failing with unknown characters. At least
2080 * then users will report back.
2081 *
2082 * In the case users ever get fixed, here is the code:
2083 */
2084 /*
2085 * term.esc = 0;
2086 * strhandle();
2087 */
2088 }
2089 }
2090 return;
2091 }
2092
2093 /*
2094 * Actions of control codes must be performed as soon they arrive
2095 * because they can be embedded inside a control sequence, and
2096 * they must not cause conflicts with sequences.
2097 */
2098 if(control) {
2099 switch(ascii) {
2100 case '\t': /* HT */
2101 tputtab(1);
2102 return;
2103 case '\b': /* BS */
2104 tmoveto(term.c.x-1, term.c.y);
2105 return;
2106 case '\r': /* CR */
2107 tmoveto(0, term.c.y);
2108 return;
2109 case '\f': /* LF */
2110 case '\v': /* VT */
2111 case '\n': /* LF */
2112 /* go to first col if the mode is set */
2113 tnewline(IS_SET(MODE_CRLF));
2114 return;
2115 case '\a': /* BEL */
2116 if(!(xw.state & WIN_FOCUSED))
2117 xseturgency(1);
2118 return;
2119 case '\033': /* ESC */
2120 csireset();
2121 term.esc = ESC_START;
2122 return;
2123 case '\016': /* SO */
2124 case '\017': /* SI */
2125 /*
2126 * Different charsets are hard to handle. Applications
2127 * should use the right alt charset escapes for the
2128 * only reason they still exist: line drawing. The
2129 * rest is incompatible history st should not support.
2130 */
2131 return;
2132 case '\032': /* SUB */
2133 case '\030': /* CAN */
2134 csireset();
2135 return;
2136 case '\005': /* ENQ (IGNORED) */
2137 case '\000': /* NUL (IGNORED) */
2138 case '\021': /* XON (IGNORED) */
2139 case '\023': /* XOFF (IGNORED) */
2140 case 0177: /* DEL (IGNORED) */
2141 return;
2142 }
2143 } else if(term.esc & ESC_START) {
2144 if(term.esc & ESC_CSI) {
2145 csiescseq.buf[csiescseq.len++] = ascii;
2146 if(BETWEEN(ascii, 0x40, 0x7E)
2147 || csiescseq.len >= \
2148 sizeof(csiescseq.buf)-1) {
2149 term.esc = 0;
2150 csiparse();
2151 csihandle();
2152 }
2153 } else if(term.esc & ESC_STR_END) {
2154 term.esc = 0;
2155 if(ascii == '\\')
2156 strhandle();
2157 } else if(term.esc & ESC_ALTCHARSET) {
2158 switch(ascii) {
2159 case '0': /* Line drawing set */
2160 term.c.attr.mode |= ATTR_GFX;
2161 break;
2162 case 'B': /* USASCII */
2163 term.c.attr.mode &= ~ATTR_GFX;
2164 break;
2165 case 'A': /* UK (IGNORED) */
2166 case '<': /* multinational charset (IGNORED) */
2167 case '5': /* Finnish (IGNORED) */
2168 case 'C': /* Finnish (IGNORED) */
2169 case 'K': /* German (IGNORED) */
2170 break;
2171 default:
2172 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2173 }
2174 term.esc = 0;
2175 } else if(term.esc & ESC_TEST) {
2176 if(ascii == '8') { /* DEC screen alignment test. */
2177 char E[UTF_SIZ] = "E";
2178 int x, y;
2179
2180 for(x = 0; x < term.col; ++x) {
2181 for(y = 0; y < term.row; ++y)
2182 tsetchar(E, &term.c.attr, x, y);
2183 }
2184 }
2185 term.esc = 0;
2186 } else {
2187 switch(ascii) {
2188 case '[':
2189 term.esc |= ESC_CSI;
2190 break;
2191 case '#':
2192 term.esc |= ESC_TEST;
2193 break;
2194 case 'P': /* DCS -- Device Control String */
2195 case '_': /* APC -- Application Program Command */
2196 case '^': /* PM -- Privacy Message */
2197 case ']': /* OSC -- Operating System Command */
2198 case 'k': /* old title set compatibility */
2199 strreset();
2200 strescseq.type = ascii;
2201 term.esc |= ESC_STR;
2202 break;
2203 case '(': /* set primary charset G0 */
2204 term.esc |= ESC_ALTCHARSET;
2205 break;
2206 case ')': /* set secondary charset G1 (IGNORED) */
2207 case '*': /* set tertiary charset G2 (IGNORED) */
2208 case '+': /* set quaternary charset G3 (IGNORED) */
2209 term.esc = 0;
2210 break;
2211 case 'D': /* IND -- Linefeed */
2212 if(term.c.y == term.bot) {
2213 tscrollup(term.top, 1);
2214 } else {
2215 tmoveto(term.c.x, term.c.y+1);
2216 }
2217 term.esc = 0;
2218 break;
2219 case 'E': /* NEL -- Next line */
2220 tnewline(1); /* always go to first col */
2221 term.esc = 0;
2222 break;
2223 case 'H': /* HTS -- Horizontal tab stop */
2224 term.tabs[term.c.x] = 1;
2225 term.esc = 0;
2226 break;
2227 case 'M': /* RI -- Reverse index */
2228 if(term.c.y == term.top) {
2229 tscrolldown(term.top, 1);
2230 } else {
2231 tmoveto(term.c.x, term.c.y-1);
2232 }
2233 term.esc = 0;
2234 break;
2235 case 'Z': /* DECID -- Identify Terminal */
2236 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2237 term.esc = 0;
2238 break;
2239 case 'c': /* RIS -- Reset to inital state */
2240 treset();
2241 term.esc = 0;
2242 xresettitle();
2243 break;
2244 case '=': /* DECPAM -- Application keypad */
2245 term.mode |= MODE_APPKEYPAD;
2246 term.esc = 0;
2247 break;
2248 case '>': /* DECPNM -- Normal keypad */
2249 term.mode &= ~MODE_APPKEYPAD;
2250 term.esc = 0;
2251 break;
2252 case '7': /* DECSC -- Save Cursor */
2253 tcursor(CURSOR_SAVE);
2254 term.esc = 0;
2255 break;
2256 case '8': /* DECRC -- Restore Cursor */
2257 tcursor(CURSOR_LOAD);
2258 term.esc = 0;
2259 break;
2260 case '\\': /* ST -- Stop */
2261 term.esc = 0;
2262 break;
2263 default:
2264 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2265 (uchar) ascii, isprint(ascii)? ascii:'.');
2266 term.esc = 0;
2267 }
2268 }
2269 /*
2270 * All characters which form part of a sequence are not
2271 * printed
2272 */
2273 return;
2274 }
2275 /*
2276 * Display control codes only if we are in graphic mode
2277 */
2278 if(control && !(term.c.attr.mode & ATTR_GFX))
2279 return;
2280 if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
2281 sel.bx = -1;
2282 if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2283 term.line[term.c.y][term.c.x].mode |= ATTR_WRAP;
2284 tnewline(1);
2285 }
2286
2287 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col) {
2288 memmove(&term.line[term.c.y][term.c.x+1],
2289 &term.line[term.c.y][term.c.x],
2290 (term.col - term.c.x - 1) * sizeof(Glyph));
2291 }
2292
2293 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2294 if(term.c.x+1 < term.col) {
2295 tmoveto(term.c.x+1, term.c.y);
2296 } else {
2297 term.c.state |= CURSOR_WRAPNEXT;
2298 }
2299 }
2300
2301 int
2302 tresize(int col, int row) {
2303 int i;
2304 int minrow = MIN(row, term.row);
2305 int mincol = MIN(col, term.col);
2306 int slide = term.c.y - row + 1;
2307 bool *bp;
2308 Line *orig;
2309
2310 if(col < 1 || row < 1)
2311 return 0;
2312
2313 /* free unneeded rows */
2314 i = 0;
2315 if(slide > 0) {
2316 /*
2317 * slide screen to keep cursor where we expect it -
2318 * tscrollup would work here, but we can optimize to
2319 * memmove because we're freeing the earlier lines
2320 */
2321 for(/* i = 0 */; i < slide; i++) {
2322 free(term.line[i]);
2323 free(term.alt[i]);
2324 }
2325 memmove(term.line, term.line + slide, row * sizeof(Line));
2326 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2327 }
2328 for(i += row; i < term.row; i++) {
2329 free(term.line[i]);
2330 free(term.alt[i]);
2331 }
2332
2333 /* resize to new height */
2334 term.line = xrealloc(term.line, row * sizeof(Line));
2335 term.alt = xrealloc(term.alt, row * sizeof(Line));
2336 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2337 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2338
2339 /* resize each row to new width, zero-pad if needed */
2340 for(i = 0; i < minrow; i++) {
2341 term.dirty[i] = 1;
2342 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2343 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2344 }
2345
2346 /* allocate any new rows */
2347 for(/* i == minrow */; i < row; i++) {
2348 term.dirty[i] = 1;
2349 term.line[i] = xcalloc(col, sizeof(Glyph));
2350 term.alt [i] = xcalloc(col, sizeof(Glyph));
2351 }
2352 if(col > term.col) {
2353 bp = term.tabs + term.col;
2354
2355 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2356 while(--bp > term.tabs && !*bp)
2357 /* nothing */ ;
2358 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2359 *bp = 1;
2360 }
2361 /* update terminal size */
2362 term.col = col;
2363 term.row = row;
2364 /* reset scrolling region */
2365 tsetscroll(0, row-1);
2366 /* make use of the LIMIT in tmoveto */
2367 tmoveto(term.c.x, term.c.y);
2368 /* Clearing both screens */
2369 orig = term.line;
2370 do {
2371 if(mincol < col && 0 < minrow) {
2372 tclearregion(mincol, 0, col - 1, minrow - 1);
2373 }
2374 if(0 < col && minrow < row) {
2375 tclearregion(0, minrow, col - 1, row - 1);
2376 }
2377 tswapscreen();
2378 } while(orig != term.line);
2379
2380 return (slide > 0);
2381 }
2382
2383 void
2384 xresize(int col, int row) {
2385 xw.tw = MAX(1, col * xw.cw);
2386 xw.th = MAX(1, row * xw.ch);
2387
2388 XFreePixmap(xw.dpy, xw.buf);
2389 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2390 DefaultDepth(xw.dpy, xw.scr));
2391 XftDrawChange(xw.draw, xw.buf);
2392 xclear(0, 0, xw.w, xw.h);
2393 }
2394
2395 static inline ushort
2396 sixd_to_16bit(int x) {
2397 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2398 }
2399
2400 void
2401 xloadcols(void) {
2402 int i, r, g, b;
2403 XRenderColor color = { .alpha = 0xffff };
2404
2405 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
2406 for(i = 0; i < LEN(colorname); i++) {
2407 if(!colorname[i])
2408 continue;
2409 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2410 die("Could not allocate color '%s'\n", colorname[i]);
2411 }
2412 }
2413
2414 /* load colors [16-255] ; same colors as xterm */
2415 for(i = 16, r = 0; r < 6; r++) {
2416 for(g = 0; g < 6; g++) {
2417 for(b = 0; b < 6; b++) {
2418 color.red = sixd_to_16bit(r);
2419 color.green = sixd_to_16bit(g);
2420 color.blue = sixd_to_16bit(b);
2421 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i])) {
2422 die("Could not allocate color %d\n", i);
2423 }
2424 i++;
2425 }
2426 }
2427 }
2428
2429 for(r = 0; r < 24; r++, i++) {
2430 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
2431 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color,
2432 &dc.col[i])) {
2433 die("Could not allocate color %d\n", i);
2434 }
2435 }
2436 }
2437
2438 int
2439 xsetcolorname(int x, const char *name) {
2440 XRenderColor color = { .alpha = 0xffff };
2441 Colour colour;
2442 if (x < 0 || x > LEN(colorname))
2443 return -1;
2444 if(!name) {
2445 if(16 <= x && x < 16 + 216) {
2446 int r = (x - 16) / 36, g = ((x - 16) % 36) / 6, b = (x - 16) % 6;
2447 color.red = sixd_to_16bit(r);
2448 color.green = sixd_to_16bit(g);
2449 color.blue = sixd_to_16bit(b);
2450 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2451 return 0; /* something went wrong */
2452 dc.col[x] = colour;
2453 return 1;
2454 } else if (16 + 216 <= x && x < 256) {
2455 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (x - (16 + 216));
2456 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2457 return 0; /* something went wrong */
2458 dc.col[x] = colour;
2459 return 1;
2460 } else {
2461 name = colorname[x];
2462 }
2463 }
2464 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &colour))
2465 return 0;
2466 dc.col[x] = colour;
2467 return 1;
2468 }
2469
2470 void
2471 xtermclear(int col1, int row1, int col2, int row2) {
2472 XftDrawRect(xw.draw,
2473 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2474 borderpx + col1 * xw.cw,
2475 borderpx + row1 * xw.ch,
2476 (col2-col1+1) * xw.cw,
2477 (row2-row1+1) * xw.ch);
2478 }
2479
2480 /*
2481 * Absolute coordinates.
2482 */
2483 void
2484 xclear(int x1, int y1, int x2, int y2) {
2485 XftDrawRect(xw.draw,
2486 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2487 x1, y1, x2-x1, y2-y1);
2488 }
2489
2490 void
2491 xhints(void) {
2492 XClassHint class = {opt_class ? opt_class : termname, termname};
2493 XWMHints wm = {.flags = InputHint, .input = 1};
2494 XSizeHints *sizeh = NULL;
2495
2496 sizeh = XAllocSizeHints();
2497 if(xw.isfixed == False) {
2498 sizeh->flags = PSize | PResizeInc | PBaseSize;
2499 sizeh->height = xw.h;
2500 sizeh->width = xw.w;
2501 sizeh->height_inc = xw.ch;
2502 sizeh->width_inc = xw.cw;
2503 sizeh->base_height = 2 * borderpx;
2504 sizeh->base_width = 2 * borderpx;
2505 } else {
2506 sizeh->flags = PMaxSize | PMinSize;
2507 sizeh->min_width = sizeh->max_width = xw.fw;
2508 sizeh->min_height = sizeh->max_height = xw.fh;
2509 }
2510
2511 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
2512 XFree(sizeh);
2513 }
2514
2515 int
2516 xloadfont(Font *f, FcPattern *pattern) {
2517 FcPattern *match;
2518 FcResult result;
2519
2520 match = FcFontMatch(NULL, pattern, &result);
2521 if(!match)
2522 return 1;
2523
2524 if(!(f->set = FcFontSort(0, match, FcTrue, 0, &result))) {
2525 FcPatternDestroy(match);
2526 return 1;
2527 }
2528
2529 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2530 FcPatternDestroy(match);
2531 return 1;
2532 }
2533
2534 f->pattern = FcPatternDuplicate(pattern);
2535
2536 f->ascent = f->match->ascent;
2537 f->descent = f->match->descent;
2538 f->lbearing = 0;
2539 f->rbearing = f->match->max_advance_width;
2540
2541 f->height = f->ascent + f->descent;
2542 f->width = f->lbearing + f->rbearing;
2543
2544 return 0;
2545 }
2546
2547 void
2548 xloadfonts(char *fontstr, int fontsize) {
2549 FcPattern *pattern;
2550 FcResult result;
2551 double fontval;
2552
2553 if(fontstr[0] == '-') {
2554 pattern = XftXlfdParse(fontstr, False, False);
2555 } else {
2556 pattern = FcNameParse((FcChar8 *)fontstr);
2557 }
2558
2559 if(!pattern)
2560 die("st: can't open font %s\n", fontstr);
2561
2562 if(fontsize > 0) {
2563 FcPatternDel(pattern, FC_PIXEL_SIZE);
2564 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2565 usedfontsize = fontsize;
2566 } else {
2567 result = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2568 if(result == FcResultMatch) {
2569 usedfontsize = (int)fontval;
2570 } else {
2571 /*
2572 * Default font size is 12, if none given. This is to
2573 * have a known usedfontsize value.
2574 */
2575 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
2576 usedfontsize = 12;
2577 }
2578 }
2579
2580 FcConfigSubstitute(0, pattern, FcMatchPattern);
2581 FcDefaultSubstitute(pattern);
2582
2583 if(xloadfont(&dc.font, pattern))
2584 die("st: can't open font %s\n", fontstr);
2585
2586 /* Setting character width and height. */
2587 xw.cw = dc.font.width;
2588 xw.ch = dc.font.height;
2589
2590 FcPatternDel(pattern, FC_SLANT);
2591 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
2592 if(xloadfont(&dc.ifont, pattern))
2593 die("st: can't open font %s\n", fontstr);
2594
2595 FcPatternDel(pattern, FC_WEIGHT);
2596 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
2597 if(xloadfont(&dc.ibfont, pattern))
2598 die("st: can't open font %s\n", fontstr);
2599
2600 FcPatternDel(pattern, FC_SLANT);
2601 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
2602 if(xloadfont(&dc.bfont, pattern))
2603 die("st: can't open font %s\n", fontstr);
2604
2605 FcPatternDestroy(pattern);
2606 }
2607
2608 void
2609 xunloadfonts(void) {
2610 int i, ip;
2611
2612 /*
2613 * Free the loaded fonts in the font cache. This is done backwards
2614 * from the frccur.
2615 */
2616 for(i = 0, ip = frccur; i < frclen; i++, ip--) {
2617 if(ip < 0)
2618 ip = LEN(frc) - 1;
2619 XftFontClose(xw.dpy, frc[ip].font);
2620 }
2621 frccur = -1;
2622 frclen = 0;
2623
2624 XftFontClose(xw.dpy, dc.font.match);
2625 FcPatternDestroy(dc.font.pattern);
2626 FcFontSetDestroy(dc.font.set);
2627 XftFontClose(xw.dpy, dc.bfont.match);
2628 FcPatternDestroy(dc.bfont.pattern);
2629 FcFontSetDestroy(dc.bfont.set);
2630 XftFontClose(xw.dpy, dc.ifont.match);
2631 FcPatternDestroy(dc.ifont.pattern);
2632 FcFontSetDestroy(dc.ifont.set);
2633 XftFontClose(xw.dpy, dc.ibfont.match);
2634 FcPatternDestroy(dc.ibfont.pattern);
2635 FcFontSetDestroy(dc.ibfont.set);
2636 }
2637
2638 void
2639 xzoom(const Arg *arg) {
2640 xunloadfonts();
2641 xloadfonts(usedfont, usedfontsize + arg->i);
2642 cresize(0, 0);
2643 redraw(0);
2644 }
2645
2646 void
2647 xinit(void) {
2648 XSetWindowAttributes attrs;
2649 XGCValues gcvalues;
2650 Cursor cursor;
2651 Window parent;
2652 int sw, sh;
2653
2654 if(!(xw.dpy = XOpenDisplay(NULL)))
2655 die("Can't open display\n");
2656 xw.scr = XDefaultScreen(xw.dpy);
2657 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
2658
2659 /* font */
2660 if(!FcInit())
2661 die("Could not init fontconfig.\n");
2662
2663 usedfont = (opt_font == NULL)? font : opt_font;
2664 xloadfonts(usedfont, 0);
2665
2666 /* colors */
2667 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
2668 xloadcols();
2669
2670 /* adjust fixed window geometry */
2671 if(xw.isfixed) {
2672 sw = DisplayWidth(xw.dpy, xw.scr);
2673 sh = DisplayHeight(xw.dpy, xw.scr);
2674 if(xw.fx < 0)
2675 xw.fx = sw + xw.fx - xw.fw - 1;
2676 if(xw.fy < 0)
2677 xw.fy = sh + xw.fy - xw.fh - 1;
2678
2679 xw.h = xw.fh;
2680 xw.w = xw.fw;
2681 } else {
2682 /* window - default size */
2683 xw.h = 2 * borderpx + term.row * xw.ch;
2684 xw.w = 2 * borderpx + term.col * xw.cw;
2685 xw.fx = 0;
2686 xw.fy = 0;
2687 }
2688
2689 /* Events */
2690 attrs.background_pixel = dc.col[defaultbg].pixel;
2691 attrs.border_pixel = dc.col[defaultbg].pixel;
2692 attrs.bit_gravity = NorthWestGravity;
2693 attrs.event_mask = FocusChangeMask | KeyPressMask
2694 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
2695 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
2696 attrs.colormap = xw.cmap;
2697
2698 parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
2699 XRootWindow(xw.dpy, xw.scr);
2700 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
2701 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
2702 xw.vis,
2703 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
2704 | CWColormap,
2705 &attrs);
2706
2707 memset(&gcvalues, 0, sizeof(gcvalues));
2708 gcvalues.graphics_exposures = False;
2709 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
2710 &gcvalues);
2711 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2712 DefaultDepth(xw.dpy, xw.scr));
2713 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
2714 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
2715
2716 /* Xft rendering context */
2717 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
2718
2719 /* input methods */
2720 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2721 XSetLocaleModifiers("@im=local");
2722 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2723 XSetLocaleModifiers("@im=");
2724 if((xw.xim = XOpenIM(xw.dpy,
2725 NULL, NULL, NULL)) == NULL) {
2726 die("XOpenIM failed. Could not open input"
2727 " device.\n");
2728 }
2729 }
2730 }
2731 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
2732 | XIMStatusNothing, XNClientWindow, xw.win,
2733 XNFocusWindow, xw.win, NULL);
2734 if(xw.xic == NULL)
2735 die("XCreateIC failed. Could not obtain input method.\n");
2736
2737 /* white cursor, black outline */
2738 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
2739 XDefineCursor(xw.dpy, xw.win, cursor);
2740 XRecolorCursor(xw.dpy, cursor,
2741 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
2742 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
2743
2744 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
2745 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
2746 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
2747
2748 xresettitle();
2749 XMapWindow(xw.dpy, xw.win);
2750 xhints();
2751 XSync(xw.dpy, 0);
2752 }
2753
2754 void
2755 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
2756 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
2757 width = charlen * xw.cw, xp, i;
2758 int frp, frcflags;
2759 int u8fl, u8fblen, u8cblen, doesexist;
2760 char *u8c, *u8fs;
2761 long u8char;
2762 Font *font = &dc.font;
2763 FcResult fcres;
2764 FcPattern *fcpattern, *fontpattern;
2765 FcFontSet *fcsets[] = { NULL };
2766 FcCharSet *fccharset;
2767 Colour *fg, *bg, *temp, revfg, revbg;
2768 XRenderColor colfg, colbg;
2769 Rectangle r;
2770
2771 frcflags = FRC_NORMAL;
2772
2773 if(base.mode & ATTR_ITALIC) {
2774 if(base.fg == defaultfg)
2775 base.fg = defaultitalic;
2776 font = &dc.ifont;
2777 frcflags = FRC_ITALIC;
2778 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
2779 if(base.fg == defaultfg)
2780 base.fg = defaultitalic;
2781 font = &dc.ibfont;
2782 frcflags = FRC_ITALICBOLD;
2783 } else if(base.mode & ATTR_UNDERLINE) {
2784 if(base.fg == defaultfg)
2785 base.fg = defaultunderline;
2786 }
2787 fg = &dc.col[base.fg];
2788 bg = &dc.col[base.bg];
2789
2790 if(base.mode & ATTR_BOLD) {
2791 if(BETWEEN(base.fg, 0, 7)) {
2792 /* basic system colors */
2793 fg = &dc.col[base.fg + 8];
2794 } else if(BETWEEN(base.fg, 16, 195)) {
2795 /* 256 colors */
2796 fg = &dc.col[base.fg + 36];
2797 } else if(BETWEEN(base.fg, 232, 251)) {
2798 /* greyscale */
2799 fg = &dc.col[base.fg + 4];
2800 }
2801 /*
2802 * Those ranges will not be brightened:
2803 * 8 - 15 – bright system colors
2804 * 196 - 231 – highest 256 color cube
2805 * 252 - 255 – brightest colors in greyscale
2806 */
2807 font = &dc.bfont;
2808 frcflags = FRC_BOLD;
2809 }
2810
2811 if(IS_SET(MODE_REVERSE)) {
2812 if(fg == &dc.col[defaultfg]) {
2813 fg = &dc.col[defaultbg];
2814 } else {
2815 colfg.red = ~fg->color.red;
2816 colfg.green = ~fg->color.green;
2817 colfg.blue = ~fg->color.blue;
2818 colfg.alpha = fg->color.alpha;
2819 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
2820 fg = &revfg;
2821 }
2822
2823 if(bg == &dc.col[defaultbg]) {
2824 bg = &dc.col[defaultfg];
2825 } else {
2826 colbg.red = ~bg->color.red;
2827 colbg.green = ~bg->color.green;
2828 colbg.blue = ~bg->color.blue;
2829 colbg.alpha = bg->color.alpha;
2830 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &revbg);
2831 bg = &revbg;
2832 }
2833 }
2834
2835 if(base.mode & ATTR_REVERSE) {
2836 temp = fg;
2837 fg = bg;
2838 bg = temp;
2839 }
2840
2841 /* Intelligent cleaning up of the borders. */
2842 if(x == 0) {
2843 xclear(0, (y == 0)? 0 : winy, borderpx,
2844 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
2845 }
2846 if(x + charlen >= term.col) {
2847 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
2848 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
2849 }
2850 if(y == 0)
2851 xclear(winx, 0, winx + width, borderpx);
2852 if(y == term.row-1)
2853 xclear(winx, winy + xw.ch, winx + width, xw.h);
2854
2855 /* Clean up the region we want to draw to. */
2856 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
2857
2858 /* Set the clip region because Xft is sometimes dirty. */
2859 r.x = 0;
2860 r.y = 0;
2861 r.height = xw.ch;
2862 r.width = width;
2863 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
2864
2865 fcsets[0] = font->set;
2866 for(xp = winx; bytelen > 0;) {
2867 /*
2868 * Search for the range in the to be printed string of glyphs
2869 * that are in the main font. Then print that range. If
2870 * some glyph is found that is not in the font, do the
2871 * fallback dance.
2872 */
2873 u8fs = s;
2874 u8fblen = 0;
2875 u8fl = 0;
2876 for(;;) {
2877 u8c = s;
2878 u8cblen = utf8decode(s, &u8char);
2879 s += u8cblen;
2880 bytelen -= u8cblen;
2881
2882 doesexist = XftCharIndex(xw.dpy, font->match, u8char);
2883 if(!doesexist || bytelen <= 0) {
2884 if(bytelen <= 0) {
2885 if(doesexist) {
2886 u8fl++;
2887 u8fblen += u8cblen;
2888 }
2889 }
2890
2891 if(u8fl > 0) {
2892 XftDrawStringUtf8(xw.draw, fg,
2893 font->match, xp,
2894 winy + font->ascent,
2895 (FcChar8 *)u8fs,
2896 u8fblen);
2897 xp += font->width * u8fl;
2898
2899 }
2900 break;
2901 }
2902
2903 u8fl++;
2904 u8fblen += u8cblen;
2905 }
2906 if(doesexist)
2907 break;
2908
2909 frp = frccur;
2910 /* Search the font cache. */
2911 for(i = 0; i < frclen; i++, frp--) {
2912 if(frp <= 0)
2913 frp = LEN(frc) - 1;
2914
2915 if(frc[frp].c == u8char
2916 && frc[frp].flags == frcflags) {
2917 break;
2918 }
2919 }
2920
2921 /* Nothing was found. */
2922 if(i >= frclen) {
2923 /*
2924 * Nothing was found in the cache. Now use
2925 * some dozen of Fontconfig calls to get the
2926 * font for one single character.
2927 */
2928 fcpattern = FcPatternDuplicate(font->pattern);
2929 fccharset = FcCharSetCreate();
2930
2931 FcCharSetAddChar(fccharset, u8char);
2932 FcPatternAddCharSet(fcpattern, FC_CHARSET,
2933 fccharset);
2934 FcPatternAddBool(fcpattern, FC_SCALABLE,
2935 FcTrue);
2936
2937 FcConfigSubstitute(0, fcpattern,
2938 FcMatchPattern);
2939 FcDefaultSubstitute(fcpattern);
2940
2941 fontpattern = FcFontSetMatch(0, fcsets,
2942 FcTrue, fcpattern, &fcres);
2943
2944 /*
2945 * Overwrite or create the new cache entry.
2946 */
2947 frccur++;
2948 frclen++;
2949 if(frccur >= LEN(frc))
2950 frccur = 0;
2951 if(frclen > LEN(frc)) {
2952 frclen = LEN(frc);
2953 XftFontClose(xw.dpy, frc[frccur].font);
2954 }
2955
2956 frc[frccur].font = XftFontOpenPattern(xw.dpy,
2957 fontpattern);
2958 frc[frccur].c = u8char;
2959 frc[frccur].flags = frcflags;
2960
2961 FcPatternDestroy(fcpattern);
2962 FcCharSetDestroy(fccharset);
2963
2964 frp = frccur;
2965 }
2966
2967 XftDrawStringUtf8(xw.draw, fg, frc[frp].font,
2968 xp, winy + frc[frp].font->ascent,
2969 (FcChar8 *)u8c, u8cblen);
2970
2971 xp += font->width;
2972 }
2973
2974 /*
2975 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
2976 winy + font->ascent, (FcChar8 *)s, bytelen);
2977 */
2978
2979 if(base.mode & ATTR_UNDERLINE) {
2980 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
2981 width, 1);
2982 }
2983
2984 /* Reset clip to none. */
2985 XftDrawSetClip(xw.draw, 0);
2986 }
2987
2988 void
2989 xdrawcursor(void) {
2990 static int oldx = 0, oldy = 0;
2991 int sl;
2992 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
2993
2994 LIMIT(oldx, 0, term.col-1);
2995 LIMIT(oldy, 0, term.row-1);
2996
2997 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
2998
2999 /* remove the old cursor */
3000 sl = utf8size(term.line[oldy][oldx].c);
3001 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
3002 oldy, 1, sl);
3003
3004 /* draw the new one */
3005 if(!(IS_SET(MODE_HIDE))) {
3006 if(xw.state & WIN_FOCUSED) {
3007 if(IS_SET(MODE_REVERSE)) {
3008 g.mode |= ATTR_REVERSE;
3009 g.fg = defaultcs;
3010 g.bg = defaultfg;
3011 }
3012
3013 sl = utf8size(g.c);
3014 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
3015 } else {
3016 XftDrawRect(xw.draw, &dc.col[defaultcs],
3017 borderpx + term.c.x * xw.cw,
3018 borderpx + term.c.y * xw.ch,
3019 xw.cw - 1, 1);
3020 XftDrawRect(xw.draw, &dc.col[defaultcs],
3021 borderpx + term.c.x * xw.cw,
3022 borderpx + term.c.y * xw.ch,
3023 1, xw.ch - 1);
3024 XftDrawRect(xw.draw, &dc.col[defaultcs],
3025 borderpx + (term.c.x + 1) * xw.cw - 1,
3026 borderpx + term.c.y * xw.ch,
3027 1, xw.ch - 1);
3028 XftDrawRect(xw.draw, &dc.col[defaultcs],
3029 borderpx + term.c.x * xw.cw,
3030 borderpx + (term.c.y + 1) * xw.ch - 1,
3031 xw.cw, 1);
3032 }
3033 oldx = term.c.x, oldy = term.c.y;
3034 }
3035 }
3036
3037
3038 void
3039 xsettitle(char *p) {
3040 XTextProperty prop;
3041
3042 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3043 &prop);
3044 XSetWMName(xw.dpy, xw.win, &prop);
3045 }
3046
3047 void
3048 xresettitle(void) {
3049 xsettitle(opt_title ? opt_title : "st");
3050 }
3051
3052 void
3053 redraw(int timeout) {
3054 struct timespec tv = {0, timeout * 1000};
3055
3056 tfulldirt();
3057 draw();
3058
3059 if(timeout > 0) {
3060 nanosleep(&tv, NULL);
3061 XSync(xw.dpy, False); /* necessary for a good tput flash */
3062 }
3063 }
3064
3065 void
3066 draw(void) {
3067 drawregion(0, 0, term.col, term.row);
3068 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3069 xw.h, 0, 0);
3070 XSetForeground(xw.dpy, dc.gc,
3071 dc.col[IS_SET(MODE_REVERSE)?
3072 defaultfg : defaultbg].pixel);
3073 }
3074
3075 void
3076 drawregion(int x1, int y1, int x2, int y2) {
3077 int ic, ib, x, y, ox, sl;
3078 Glyph base, new;
3079 char buf[DRAW_BUF_SIZ];
3080 bool ena_sel = sel.bx != -1;
3081
3082 if(sel.alt ^ IS_SET(MODE_ALTSCREEN))
3083 ena_sel = 0;
3084
3085 if(!(xw.state & WIN_VISIBLE))
3086 return;
3087
3088 for(y = y1; y < y2; y++) {
3089 if(!term.dirty[y])
3090 continue;
3091
3092 xtermclear(0, y, term.col, y);
3093 term.dirty[y] = 0;
3094 base = term.line[y][0];
3095 ic = ib = ox = 0;
3096 for(x = x1; x < x2; x++) {
3097 new = term.line[y][x];
3098 if(ena_sel && selected(x, y))
3099 new.mode ^= ATTR_REVERSE;
3100 if(ib > 0 && (ATTRCMP(base, new)
3101 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3102 xdraws(buf, base, ox, y, ic, ib);
3103 ic = ib = 0;
3104 }
3105 if(ib == 0) {
3106 ox = x;
3107 base = new;
3108 }
3109
3110 sl = utf8size(new.c);
3111 memcpy(buf+ib, new.c, sl);
3112 ib += sl;
3113 ++ic;
3114 }
3115 if(ib > 0)
3116 xdraws(buf, base, ox, y, ic, ib);
3117 }
3118 xdrawcursor();
3119 }
3120
3121 void
3122 expose(XEvent *ev) {
3123 XExposeEvent *e = &ev->xexpose;
3124
3125 if(xw.state & WIN_REDRAW) {
3126 if(!e->count)
3127 xw.state &= ~WIN_REDRAW;
3128 }
3129 redraw(0);
3130 }
3131
3132 void
3133 visibility(XEvent *ev) {
3134 XVisibilityEvent *e = &ev->xvisibility;
3135
3136 if(e->state == VisibilityFullyObscured) {
3137 xw.state &= ~WIN_VISIBLE;
3138 } else if(!(xw.state & WIN_VISIBLE)) {
3139 /* need a full redraw for next Expose, not just a buf copy */
3140 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3141 }
3142 }
3143
3144 void
3145 unmap(XEvent *ev) {
3146 xw.state &= ~WIN_VISIBLE;
3147 }
3148
3149 void
3150 xseturgency(int add) {
3151 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3152
3153 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
3154 XSetWMHints(xw.dpy, xw.win, h);
3155 XFree(h);
3156 }
3157
3158 void
3159 focus(XEvent *ev) {
3160 XFocusChangeEvent *e = &ev->xfocus;
3161
3162 if(e->mode == NotifyGrab)
3163 return;
3164
3165 if(ev->type == FocusIn) {
3166 XSetICFocus(xw.xic);
3167 xw.state |= WIN_FOCUSED;
3168 xseturgency(0);
3169 } else {
3170 XUnsetICFocus(xw.xic);
3171 xw.state &= ~WIN_FOCUSED;
3172 }
3173 }
3174
3175 inline bool
3176 match(uint mask, uint state) {
3177 state &= ~(ignoremod);
3178
3179 if(mask == XK_NO_MOD && state)
3180 return false;
3181 if(mask != XK_ANY_MOD && mask != XK_NO_MOD && !state)
3182 return false;
3183 if((state & mask) != state)
3184 return false;
3185 return true;
3186 }
3187
3188 void
3189 numlock(const Arg *dummy) {
3190 term.numlock ^= 1;
3191 }
3192
3193 char*
3194 kmap(KeySym k, uint state) {
3195 uint mask;
3196 Key *kp;
3197 int i;
3198
3199 /* Check for mapped keys out of X11 function keys. */
3200 for(i = 0; i < LEN(mappedkeys); i++) {
3201 if(mappedkeys[i] == k)
3202 break;
3203 }
3204 if(i == LEN(mappedkeys)) {
3205 if((k & 0xFFFF) < 0xFD00)
3206 return NULL;
3207 }
3208
3209 for(kp = key; kp < key + LEN(key); kp++) {
3210 mask = kp->mask;
3211
3212 if(kp->k != k)
3213 continue;
3214
3215 if(!match(mask, state))
3216 continue;
3217
3218 if(kp->appkey > 0) {
3219 if(!IS_SET(MODE_APPKEYPAD))
3220 continue;
3221 if(term.numlock && kp->appkey == 2)
3222 continue;
3223 } else if(kp->appkey < 0 && IS_SET(MODE_APPKEYPAD)) {
3224 continue;
3225 }
3226
3227 if((kp->appcursor < 0 && IS_SET(MODE_APPCURSOR)) ||
3228 (kp->appcursor > 0
3229 && !IS_SET(MODE_APPCURSOR))) {
3230 continue;
3231 }
3232
3233 if((kp->crlf < 0 && IS_SET(MODE_CRLF)) ||
3234 (kp->crlf > 0 && !IS_SET(MODE_CRLF))) {
3235 continue;
3236 }
3237
3238 return kp->s;
3239 }
3240
3241 return NULL;
3242 }
3243
3244 void
3245 kpress(XEvent *ev) {
3246 XKeyEvent *e = &ev->xkey;
3247 KeySym ksym;
3248 char xstr[31], buf[32], *customkey, *cp = buf;
3249 int len, ret;
3250 long c;
3251 Status status;
3252 Shortcut *bp;
3253
3254 if(IS_SET(MODE_KBDLOCK))
3255 return;
3256
3257 len = XmbLookupString(xw.xic, e, xstr, sizeof(xstr), &ksym, &status);
3258 e->state &= ~Mod2Mask;
3259 /* 1. shortcuts */
3260 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3261 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3262 bp->func(&(bp->arg));
3263 return;
3264 }
3265 }
3266
3267 /* 2. custom keys from config.h */
3268 if((customkey = kmap(ksym, e->state))) {
3269 len = strlen(customkey);
3270 memcpy(buf, customkey, len);
3271 /* 3. hardcoded (overrides X lookup) */
3272 } else {
3273 if(len == 0)
3274 return;
3275
3276 if(len == 1 && e->state & Mod1Mask) {
3277 if(IS_SET(MODE_8BIT)) {
3278 if(*xstr < 0177) {
3279 c = *xstr | B7;
3280 ret = utf8encode(&c, cp);
3281 cp += ret;
3282 len = 0;
3283 }
3284 } else {
3285 *cp++ = '\033';
3286 }
3287 }
3288
3289 memcpy(cp, xstr, len);
3290 len = cp - buf + len;
3291 }
3292
3293 ttywrite(buf, len);
3294 if(IS_SET(MODE_ECHO))
3295 techo(buf, len);
3296 }
3297
3298
3299 void
3300 cmessage(XEvent *e) {
3301 /*
3302 * See xembed specs
3303 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3304 */
3305 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3306 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3307 xw.state |= WIN_FOCUSED;
3308 xseturgency(0);
3309 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3310 xw.state &= ~WIN_FOCUSED;
3311 }
3312 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3313 /* Send SIGHUP to shell */
3314 kill(pid, SIGHUP);
3315 exit(EXIT_SUCCESS);
3316 }
3317 }
3318
3319 void
3320 cresize(int width, int height) {
3321 int col, row;
3322
3323 if(width != 0)
3324 xw.w = width;
3325 if(height != 0)
3326 xw.h = height;
3327
3328 col = (xw.w - 2 * borderpx) / xw.cw;
3329 row = (xw.h - 2 * borderpx) / xw.ch;
3330
3331 tresize(col, row);
3332 xresize(col, row);
3333 ttyresize();
3334 }
3335
3336 void
3337 resize(XEvent *e) {
3338 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3339 return;
3340
3341 cresize(e->xconfigure.width, e->xconfigure.height);
3342 }
3343
3344 void
3345 run(void) {
3346 XEvent ev;
3347 fd_set rfd;
3348 int xfd = XConnectionNumber(xw.dpy), xev;
3349 struct timeval drawtimeout, *tv = NULL, now, last;
3350
3351 gettimeofday(&last, NULL);
3352
3353 for(xev = actionfps;;) {
3354 FD_ZERO(&rfd);
3355 FD_SET(cmdfd, &rfd);
3356 FD_SET(xfd, &rfd);
3357 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
3358 if(errno == EINTR)
3359 continue;
3360 die("select failed: %s\n", SERRNO);
3361 }
3362
3363 gettimeofday(&now, NULL);
3364 drawtimeout.tv_sec = 0;
3365 drawtimeout.tv_usec = (1000/xfps) * 1000;
3366 tv = &drawtimeout;
3367
3368 if(FD_ISSET(cmdfd, &rfd))
3369 ttyread();
3370
3371 if(FD_ISSET(xfd, &rfd))
3372 xev = actionfps;
3373
3374 if(TIMEDIFF(now, last) > \
3375 (xev ? (1000/xfps) : (1000/actionfps))) {
3376 while(XPending(xw.dpy)) {
3377 XNextEvent(xw.dpy, &ev);
3378 if(XFilterEvent(&ev, None))
3379 continue;
3380 if(handler[ev.type])
3381 (handler[ev.type])(&ev);
3382 }
3383
3384 draw();
3385 XFlush(xw.dpy);
3386 last = now;
3387
3388 if(xev && !FD_ISSET(xfd, &rfd))
3389 xev--;
3390 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd))
3391 tv = NULL;
3392 }
3393 }
3394 }
3395
3396 void
3397 usage(void) {
3398 die("%s " VERSION " (c) 2010-2013 st engineers\n" \
3399 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]" \
3400 " [-t title] [-w windowid] [-e command ...]\n", argv0);
3401 }
3402
3403 int
3404 main(int argc, char *argv[]) {
3405 int bitm, xr, yr;
3406 uint wr, hr;
3407
3408 xw.fw = xw.fh = xw.fx = xw.fy = 0;
3409 xw.isfixed = False;
3410
3411 ARGBEGIN {
3412 case 'a':
3413 allowaltscreen = false;
3414 break;
3415 case 'c':
3416 opt_class = EARGF(usage());
3417 break;
3418 case 'e':
3419 /* eat all remaining arguments */
3420 if(argc > 1)
3421 opt_cmd = &argv[1];
3422 goto run;
3423 case 'f':
3424 opt_font = EARGF(usage());
3425 break;
3426 case 'g':
3427 bitm = XParseGeometry(EARGF(usage()), &xr, &yr, &wr, &hr);
3428 if(bitm & XValue)
3429 xw.fx = xr;
3430 if(bitm & YValue)
3431 xw.fy = yr;
3432 if(bitm & WidthValue)
3433 xw.fw = (int)wr;
3434 if(bitm & HeightValue)
3435 xw.fh = (int)hr;
3436 if(bitm & XNegative && xw.fx == 0)
3437 xw.fx = -1;
3438 if(bitm & XNegative && xw.fy == 0)
3439 xw.fy = -1;
3440
3441 if(xw.fh != 0 && xw.fw != 0)
3442 xw.isfixed = True;
3443 break;
3444 case 'o':
3445 opt_io = EARGF(usage());
3446 break;
3447 case 't':
3448 opt_title = EARGF(usage());
3449 break;
3450 case 'w':
3451 opt_embed = EARGF(usage());
3452 break;
3453 case 'v':
3454 default:
3455 usage();
3456 } ARGEND;
3457
3458 run:
3459 setlocale(LC_CTYPE, "");
3460 XSetLocaleModifiers("");
3461 tnew(80, 24);
3462 xinit();
3463 ttynew();
3464 selinit();
3465 if(xw.isfixed)
3466 cresize(xw.h, xw.w);
3467 run();
3468
3469 return 0;
3470 }
3471