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Added support for double/triple click+dragging.
[st.git] / st.c
1 /* See LICENSE for licence details. */
2 #include <ctype.h>
3 #include <errno.h>
4 #include <fcntl.h>
5 #include <limits.h>
6 #include <locale.h>
7 #include <pwd.h>
8 #include <stdarg.h>
9 #include <stdbool.h>
10 #include <stdio.h>
11 #include <stdlib.h>
12 #include <string.h>
13 #include <signal.h>
14 #include <sys/ioctl.h>
15 #include <sys/select.h>
16 #include <sys/stat.h>
17 #include <sys/time.h>
18 #include <sys/types.h>
19 #include <sys/wait.h>
20 #include <time.h>
21 #include <unistd.h>
22 #include <X11/Xatom.h>
23 #include <X11/Xlib.h>
24 #include <X11/Xutil.h>
25 #include <X11/cursorfont.h>
26 #include <X11/keysym.h>
27 #include <X11/Xft/Xft.h>
28 #include <fontconfig/fontconfig.h>
29
30 #include "arg.h"
31
32 char *argv0;
33
34 #define Glyph Glyph_
35 #define Font Font_
36 #define Draw XftDraw *
37 #define Colour XftColor
38 #define Colourmap Colormap
39
40 #if defined(__linux)
41 #include <pty.h>
42 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
43 #include <util.h>
44 #elif defined(__FreeBSD__) || defined(__DragonFly__)
45 #include <libutil.h>
46 #endif
47
48
49 /* XEMBED messages */
50 #define XEMBED_FOCUS_IN 4
51 #define XEMBED_FOCUS_OUT 5
52
53 /* Arbitrary sizes */
54 #define UTF_SIZ 4
55 #define ESC_BUF_SIZ (128*UTF_SIZ)
56 #define ESC_ARG_SIZ 16
57 #define STR_BUF_SIZ ESC_BUF_SIZ
58 #define STR_ARG_SIZ ESC_ARG_SIZ
59 #define DRAW_BUF_SIZ 20*1024
60 #define XK_ANY_MOD UINT_MAX
61 #define XK_NO_MOD 0
62 #define XK_SWITCH_MOD (1<<13)
63
64 #define REDRAW_TIMEOUT (80*1000) /* 80 ms */
65
66 /* macros */
67 #define SERRNO strerror(errno)
68 #define MIN(a, b) ((a) < (b) ? (a) : (b))
69 #define MAX(a, b) ((a) < (b) ? (b) : (a))
70 #define LEN(a) (sizeof(a) / sizeof(a[0]))
71 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
72 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
73 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
74 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
75 #define IS_SET(flag) ((term.mode & (flag)) != 0)
76 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_usec-t2.tv_usec)/1000)
77
78 #define VT102ID "\033[?6c"
79
80 enum glyph_attribute {
81 ATTR_NULL = 0,
82 ATTR_REVERSE = 1,
83 ATTR_UNDERLINE = 2,
84 ATTR_BOLD = 4,
85 ATTR_GFX = 8,
86 ATTR_ITALIC = 16,
87 ATTR_BLINK = 32,
88 };
89
90 enum cursor_movement {
91 CURSOR_SAVE,
92 CURSOR_LOAD
93 };
94
95 enum cursor_state {
96 CURSOR_DEFAULT = 0,
97 CURSOR_WRAPNEXT = 1,
98 CURSOR_ORIGIN = 2
99 };
100
101 enum term_mode {
102 MODE_WRAP = 1,
103 MODE_INSERT = 2,
104 MODE_APPKEYPAD = 4,
105 MODE_ALTSCREEN = 8,
106 MODE_CRLF = 16,
107 MODE_MOUSEBTN = 32,
108 MODE_MOUSEMOTION = 64,
109 MODE_MOUSE = 32|64,
110 MODE_REVERSE = 128,
111 MODE_KBDLOCK = 256,
112 MODE_HIDE = 512,
113 MODE_ECHO = 1024,
114 MODE_APPCURSOR = 2048,
115 MODE_MOUSESGR = 4096,
116 };
117
118 enum escape_state {
119 ESC_START = 1,
120 ESC_CSI = 2,
121 ESC_STR = 4, /* DSC, OSC, PM, APC */
122 ESC_ALTCHARSET = 8,
123 ESC_STR_END = 16, /* a final string was encountered */
124 ESC_TEST = 32, /* Enter in test mode */
125 };
126
127 enum window_state {
128 WIN_VISIBLE = 1,
129 WIN_REDRAW = 2,
130 WIN_FOCUSED = 4
131 };
132
133 enum selection_type {
134 SEL_REGULAR = 1,
135 SEL_RECTANGULAR = 2
136 };
137
138 enum selection_snap {
139 SNAP_WORD = 1,
140 SNAP_LINE = 2
141 };
142
143 /* bit macro */
144 #undef B0
145 enum { B0=1, B1=2, B2=4, B3=8, B4=16, B5=32, B6=64, B7=128 };
146
147 typedef unsigned char uchar;
148 typedef unsigned int uint;
149 typedef unsigned long ulong;
150 typedef unsigned short ushort;
151
152 typedef struct {
153 char c[UTF_SIZ]; /* character code */
154 uchar mode; /* attribute flags */
155 ushort fg; /* foreground */
156 ushort bg; /* background */
157 } Glyph;
158
159 typedef Glyph *Line;
160
161 typedef struct {
162 Glyph attr; /* current char attributes */
163 int x;
164 int y;
165 char state;
166 } TCursor;
167
168 /* CSI Escape sequence structs */
169 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
170 typedef struct {
171 char buf[ESC_BUF_SIZ]; /* raw string */
172 int len; /* raw string length */
173 char priv;
174 int arg[ESC_ARG_SIZ];
175 int narg; /* nb of args */
176 char mode;
177 } CSIEscape;
178
179 /* STR Escape sequence structs */
180 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
181 typedef struct {
182 char type; /* ESC type ... */
183 char buf[STR_BUF_SIZ]; /* raw string */
184 int len; /* raw string length */
185 char *args[STR_ARG_SIZ];
186 int narg; /* nb of args */
187 } STREscape;
188
189 /* Internal representation of the screen */
190 typedef struct {
191 int row; /* nb row */
192 int col; /* nb col */
193 Line *line; /* screen */
194 Line *alt; /* alternate screen */
195 bool *dirty; /* dirtyness of lines */
196 TCursor c; /* cursor */
197 int top; /* top scroll limit */
198 int bot; /* bottom scroll limit */
199 int mode; /* terminal mode flags */
200 int esc; /* escape state flags */
201 bool numlock; /* lock numbers in keyboard */
202 bool *tabs;
203 } Term;
204
205 /* Purely graphic info */
206 typedef struct {
207 Display *dpy;
208 Colourmap cmap;
209 Window win;
210 Drawable buf;
211 Atom xembed, wmdeletewin;
212 XIM xim;
213 XIC xic;
214 Draw draw;
215 Visual *vis;
216 int scr;
217 bool isfixed; /* is fixed geometry? */
218 int fx, fy, fw, fh; /* fixed geometry */
219 int tw, th; /* tty width and height */
220 int w, h; /* window width and height */
221 int ch; /* char height */
222 int cw; /* char width */
223 char state; /* focus, redraw, visible */
224 } XWindow;
225
226 typedef struct {
227 KeySym k;
228 uint mask;
229 char s[ESC_BUF_SIZ];
230 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
231 signed char appkey; /* application keypad */
232 signed char appcursor; /* application cursor */
233 signed char crlf; /* crlf mode */
234 } Key;
235
236 /* TODO: use better name for vars... */
237 typedef struct {
238 int mode;
239 int type;
240 int snap;
241 int bx, by;
242 int ex, ey;
243 struct {
244 int x, y;
245 } b, e;
246 char *clip;
247 Atom xtarget;
248 bool alt;
249 struct timeval tclick1;
250 struct timeval tclick2;
251 } Selection;
252
253 typedef union {
254 int i;
255 unsigned int ui;
256 float f;
257 const void *v;
258 } Arg;
259
260 typedef struct {
261 unsigned int mod;
262 KeySym keysym;
263 void (*func)(const Arg *);
264 const Arg arg;
265 } Shortcut;
266
267 /* function definitions used in config.h */
268 static void clippaste(const Arg *);
269 static void numlock(const Arg *);
270 static void selpaste(const Arg *);
271 static void xzoom(const Arg *);
272
273 /* Config.h for applying patches and the configuration. */
274 #include "config.h"
275
276 /* Font structure */
277 typedef struct {
278 int height;
279 int width;
280 int ascent;
281 int descent;
282 short lbearing;
283 short rbearing;
284 XftFont *match;
285 FcFontSet *set;
286 FcPattern *pattern;
287 } Font;
288
289 /* Drawing Context */
290 typedef struct {
291 Colour col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
292 Font font, bfont, ifont, ibfont;
293 GC gc;
294 } DC;
295
296 static void die(const char *, ...);
297 static void draw(void);
298 static void redraw(int);
299 static void drawregion(int, int, int, int);
300 static void execsh(void);
301 static void sigchld(int);
302 static void run(void);
303
304 static void csidump(void);
305 static void csihandle(void);
306 static void csiparse(void);
307 static void csireset(void);
308 static void strdump(void);
309 static void strhandle(void);
310 static void strparse(void);
311 static void strreset(void);
312
313 static void tclearregion(int, int, int, int);
314 static void tcursor(int);
315 static void tdeletechar(int);
316 static void tdeleteline(int);
317 static void tinsertblank(int);
318 static void tinsertblankline(int);
319 static void tmoveto(int, int);
320 static void tmoveato(int x, int y);
321 static void tnew(int, int);
322 static void tnewline(int);
323 static void tputtab(bool);
324 static void tputc(char *, int);
325 static void treset(void);
326 static int tresize(int, int);
327 static void tscrollup(int, int);
328 static void tscrolldown(int, int);
329 static void tsetattr(int*, int);
330 static void tsetchar(char *, Glyph *, int, int);
331 static void tsetscroll(int, int);
332 static void tswapscreen(void);
333 static void tsetdirt(int, int);
334 static void tsetmode(bool, bool, int *, int);
335 static void tfulldirt(void);
336 static void techo(char *, int);
337
338 static inline bool match(uint, uint);
339 static void ttynew(void);
340 static void ttyread(void);
341 static void ttyresize(void);
342 static void ttywrite(const char *, size_t);
343
344 static void xdraws(char *, Glyph, int, int, int, int);
345 static void xhints(void);
346 static void xclear(int, int, int, int);
347 static void xdrawcursor(void);
348 static void xinit(void);
349 static void xloadcols(void);
350 static int xsetcolorname(int, const char *);
351 static int xloadfont(Font *, FcPattern *);
352 static void xloadfonts(char *, int);
353 static void xsettitle(char *);
354 static void xresettitle(void);
355 static void xseturgency(int);
356 static void xsetsel(char*);
357 static void xtermclear(int, int, int, int);
358 static void xunloadfonts(void);
359 static void xresize(int, int);
360
361 static void expose(XEvent *);
362 static void visibility(XEvent *);
363 static void unmap(XEvent *);
364 static char *kmap(KeySym, uint);
365 static void kpress(XEvent *);
366 static void cmessage(XEvent *);
367 static void cresize(int, int);
368 static void resize(XEvent *);
369 static void focus(XEvent *);
370 static void brelease(XEvent *);
371 static void bpress(XEvent *);
372 static void bmotion(XEvent *);
373 static void selnotify(XEvent *);
374 static void selclear(XEvent *);
375 static void selrequest(XEvent *);
376
377 static void selinit(void);
378 static inline bool selected(int, int);
379 static void selcopy(void);
380 static void selscroll(int, int);
381 static void selsnap(int, int *, int *, int);
382
383 static int utf8decode(char *, long *);
384 static int utf8encode(long *, char *);
385 static int utf8size(char *);
386 static int isfullutf8(char *, int);
387
388 static ssize_t xwrite(int, char *, size_t);
389 static void *xmalloc(size_t);
390 static void *xrealloc(void *, size_t);
391 static void *xcalloc(size_t, size_t);
392
393 static void (*handler[LASTEvent])(XEvent *) = {
394 [KeyPress] = kpress,
395 [ClientMessage] = cmessage,
396 [ConfigureNotify] = resize,
397 [VisibilityNotify] = visibility,
398 [UnmapNotify] = unmap,
399 [Expose] = expose,
400 [FocusIn] = focus,
401 [FocusOut] = focus,
402 [MotionNotify] = bmotion,
403 [ButtonPress] = bpress,
404 [ButtonRelease] = brelease,
405 [SelectionClear] = selclear,
406 [SelectionNotify] = selnotify,
407 [SelectionRequest] = selrequest,
408 };
409
410 /* Globals */
411 static DC dc;
412 static XWindow xw;
413 static Term term;
414 static CSIEscape csiescseq;
415 static STREscape strescseq;
416 static int cmdfd;
417 static pid_t pid;
418 static Selection sel;
419 static int iofd = -1;
420 static char **opt_cmd = NULL;
421 static char *opt_io = NULL;
422 static char *opt_title = NULL;
423 static char *opt_embed = NULL;
424 static char *opt_class = NULL;
425 static char *opt_font = NULL;
426
427 static char *usedfont = NULL;
428 static int usedfontsize = 0;
429
430 /* Font Ring Cache */
431 enum {
432 FRC_NORMAL,
433 FRC_ITALIC,
434 FRC_BOLD,
435 FRC_ITALICBOLD
436 };
437
438 typedef struct {
439 XftFont *font;
440 long c;
441 int flags;
442 } Fontcache;
443
444 /*
445 * Fontcache is a ring buffer, with frccur as current position and frclen as
446 * the current length of used elements.
447 */
448
449 static Fontcache frc[1024];
450 static int frccur = -1, frclen = 0;
451
452 ssize_t
453 xwrite(int fd, char *s, size_t len) {
454 size_t aux = len;
455
456 while(len > 0) {
457 ssize_t r = write(fd, s, len);
458 if(r < 0)
459 return r;
460 len -= r;
461 s += r;
462 }
463 return aux;
464 }
465
466 void *
467 xmalloc(size_t len) {
468 void *p = malloc(len);
469
470 if(!p)
471 die("Out of memory\n");
472
473 return p;
474 }
475
476 void *
477 xrealloc(void *p, size_t len) {
478 if((p = realloc(p, len)) == NULL)
479 die("Out of memory\n");
480
481 return p;
482 }
483
484 void *
485 xcalloc(size_t nmemb, size_t size) {
486 void *p = calloc(nmemb, size);
487
488 if(!p)
489 die("Out of memory\n");
490
491 return p;
492 }
493
494 int
495 utf8decode(char *s, long *u) {
496 uchar c;
497 int i, n, rtn;
498
499 rtn = 1;
500 c = *s;
501 if(~c & B7) { /* 0xxxxxxx */
502 *u = c;
503 return rtn;
504 } else if((c & (B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */
505 *u = c&(B4|B3|B2|B1|B0);
506 n = 1;
507 } else if((c & (B7|B6|B5|B4)) == (B7|B6|B5)) { /* 1110xxxx */
508 *u = c&(B3|B2|B1|B0);
509 n = 2;
510 } else if((c & (B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) { /* 11110xxx */
511 *u = c & (B2|B1|B0);
512 n = 3;
513 } else {
514 goto invalid;
515 }
516
517 for(i = n, ++s; i > 0; --i, ++rtn, ++s) {
518 c = *s;
519 if((c & (B7|B6)) != B7) /* 10xxxxxx */
520 goto invalid;
521 *u <<= 6;
522 *u |= c & (B5|B4|B3|B2|B1|B0);
523 }
524
525 if((n == 1 && *u < 0x80) ||
526 (n == 2 && *u < 0x800) ||
527 (n == 3 && *u < 0x10000) ||
528 (*u >= 0xD800 && *u <= 0xDFFF)) {
529 goto invalid;
530 }
531
532 return rtn;
533 invalid:
534 *u = 0xFFFD;
535
536 return rtn;
537 }
538
539 int
540 utf8encode(long *u, char *s) {
541 uchar *sp;
542 ulong uc;
543 int i, n;
544
545 sp = (uchar *)s;
546 uc = *u;
547 if(uc < 0x80) {
548 *sp = uc; /* 0xxxxxxx */
549 return 1;
550 } else if(*u < 0x800) {
551 *sp = (uc >> 6) | (B7|B6); /* 110xxxxx */
552 n = 1;
553 } else if(uc < 0x10000) {
554 *sp = (uc >> 12) | (B7|B6|B5); /* 1110xxxx */
555 n = 2;
556 } else if(uc <= 0x10FFFF) {
557 *sp = (uc >> 18) | (B7|B6|B5|B4); /* 11110xxx */
558 n = 3;
559 } else {
560 goto invalid;
561 }
562
563 for(i=n,++sp; i>0; --i,++sp)
564 *sp = ((uc >> 6*(i-1)) & (B5|B4|B3|B2|B1|B0)) | B7; /* 10xxxxxx */
565
566 return n+1;
567 invalid:
568 /* U+FFFD */
569 *s++ = '\xEF';
570 *s++ = '\xBF';
571 *s = '\xBD';
572
573 return 3;
574 }
575
576 /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
577 UTF-8 otherwise return 0 */
578 int
579 isfullutf8(char *s, int b) {
580 uchar *c1, *c2, *c3;
581
582 c1 = (uchar *)s;
583 c2 = (uchar *)++s;
584 c3 = (uchar *)++s;
585 if(b < 1) {
586 return 0;
587 } else if((*c1&(B7|B6|B5)) == (B7|B6) && b == 1) {
588 return 0;
589 } else if((*c1&(B7|B6|B5|B4)) == (B7|B6|B5) &&
590 ((b == 1) ||
591 ((b == 2) && (*c2&(B7|B6)) == B7))) {
592 return 0;
593 } else if((*c1&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4) &&
594 ((b == 1) ||
595 ((b == 2) && (*c2&(B7|B6)) == B7) ||
596 ((b == 3) && (*c2&(B7|B6)) == B7 && (*c3&(B7|B6)) == B7))) {
597 return 0;
598 } else {
599 return 1;
600 }
601 }
602
603 int
604 utf8size(char *s) {
605 uchar c = *s;
606
607 if(~c&B7) {
608 return 1;
609 } else if((c&(B7|B6|B5)) == (B7|B6)) {
610 return 2;
611 } else if((c&(B7|B6|B5|B4)) == (B7|B6|B5)) {
612 return 3;
613 } else {
614 return 4;
615 }
616 }
617
618 void
619 selinit(void) {
620 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
621 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
622 sel.mode = 0;
623 sel.bx = -1;
624 sel.clip = NULL;
625 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
626 if(sel.xtarget == None)
627 sel.xtarget = XA_STRING;
628 }
629
630 static int
631 x2col(int x) {
632 x -= borderpx;
633 x /= xw.cw;
634
635 return LIMIT(x, 0, term.col-1);
636 }
637
638 static int
639 y2row(int y) {
640 y -= borderpx;
641 y /= xw.ch;
642
643 return LIMIT(y, 0, term.row-1);
644 }
645
646 static inline bool
647 selected(int x, int y) {
648 int bx, ex;
649
650 if(sel.ey == y && sel.by == y) {
651 bx = MIN(sel.bx, sel.ex);
652 ex = MAX(sel.bx, sel.ex);
653
654 return BETWEEN(x, bx, ex);
655 }
656
657 if(sel.type == SEL_RECTANGULAR) {
658 return ((sel.b.y <= y && y <= sel.e.y)
659 && (sel.b.x <= x && x <= sel.e.x));
660 }
661 return ((sel.b.y < y && y < sel.e.y)
662 || (y == sel.e.y && x <= sel.e.x))
663 || (y == sel.b.y && x >= sel.b.x
664 && (x <= sel.e.x || sel.b.y != sel.e.y));
665 }
666
667 void
668 selsnap(int mode, int *x, int *y, int direction) {
669 switch(mode) {
670 case SNAP_WORD:
671 while(*x > 0 && *x < term.col-1 && term.line[*y][*x + direction].c[0] != ' ') {
672 *x += direction;
673 }
674 break;
675
676 case SNAP_LINE:
677 *x = (direction < 0) ? 0 : term.col - 1;
678 break;
679
680 default:
681 /* do nothing */
682 break;
683 }
684 }
685
686 void
687 getbuttoninfo(XEvent *e) {
688 int type;
689 uint state = e->xbutton.state &~Button1Mask;
690
691 sel.alt = IS_SET(MODE_ALTSCREEN);
692
693 sel.ex = x2col(e->xbutton.x);
694 sel.ey = y2row(e->xbutton.y);
695
696 if (sel.by < sel.ey
697 || (sel.by == sel.ey && sel.bx < sel.ex)) {
698 selsnap(sel.snap, &sel.bx, &sel.by, -1);
699 selsnap(sel.snap, &sel.ex, &sel.ey, +1);
700 } else {
701 selsnap(sel.snap, &sel.ex, &sel.ey, -1);
702 selsnap(sel.snap, &sel.bx, &sel.by, +1);
703 }
704
705 sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
706 sel.b.y = MIN(sel.by, sel.ey);
707 sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
708 sel.e.y = MAX(sel.by, sel.ey);
709
710 sel.type = SEL_REGULAR;
711 for(type = 1; type < LEN(selmasks); ++type) {
712 if(match(selmasks[type], state)) {
713 sel.type = type;
714 break;
715 }
716 }
717 }
718
719 void
720 mousereport(XEvent *e) {
721 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
722 button = e->xbutton.button, state = e->xbutton.state,
723 len;
724 char buf[40];
725 static int ob, ox, oy;
726
727 /* from urxvt */
728 if(e->xbutton.type == MotionNotify) {
729 if(!IS_SET(MODE_MOUSEMOTION) || (x == ox && y == oy))
730 return;
731 button = ob + 32;
732 ox = x, oy = y;
733 } else if(!IS_SET(MODE_MOUSESGR)
734 && (e->xbutton.type == ButtonRelease
735 || button == AnyButton)) {
736 button = 3;
737 } else {
738 button -= Button1;
739 if(button >= 3)
740 button += 64 - 3;
741 if(e->xbutton.type == ButtonPress) {
742 ob = button;
743 ox = x, oy = y;
744 }
745 }
746
747 button += (state & ShiftMask ? 4 : 0)
748 + (state & Mod4Mask ? 8 : 0)
749 + (state & ControlMask ? 16 : 0);
750
751 len = 0;
752 if(IS_SET(MODE_MOUSESGR)) {
753 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
754 button, x+1, y+1,
755 e->xbutton.type == ButtonRelease ? 'm' : 'M');
756 } else if(x < 223 && y < 223) {
757 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
758 32+button, 32+x+1, 32+y+1);
759 } else {
760 return;
761 }
762
763 ttywrite(buf, len);
764 }
765
766 void
767 bpress(XEvent *e) {
768 struct timeval now;
769
770 if(IS_SET(MODE_MOUSE)) {
771 mousereport(e);
772 } else if(e->xbutton.button == Button1) {
773 gettimeofday(&now, NULL);
774 /* Clear previous selection, logically and visually. */
775 if(sel.bx != -1) {
776 sel.bx = -1;
777 tsetdirt(sel.b.y, sel.e.y);
778 draw();
779 }
780 sel.mode = 1;
781 sel.type = SEL_REGULAR;
782 sel.ex = sel.bx = x2col(e->xbutton.x);
783 sel.ey = sel.by = y2row(e->xbutton.y);
784 /*
785 * Snap handling.
786 * If user clicks are fasst enough (e.g. below timeouts),
787 * we ignore if his hand slipped left or down and accidentally selected more;
788 * we are just snapping to whatever we're snapping.
789 */
790 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
791 /* Snap to line */
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, sel.b.y = sel.by, sel.e.x = sel.ex, sel.e.y = sel.ey;
801 /* Draw selection, unless it's regular and we don't want to make clicks visible */
802 if (sel.snap != 0) {
803 tsetdirt(sel.b.y, sel.e.y);
804 draw();
805 }
806 sel.tclick2 = sel.tclick1;
807 sel.tclick1 = now;
808 } else if(e->xbutton.button == Button4) {
809 ttywrite("\031", 1);
810 } else if(e->xbutton.button == Button5) {
811 ttywrite("\005", 1);
812 }
813 }
814
815 void
816 selcopy(void) {
817 char *str, *ptr;
818 int x, y, bufsize, size;
819 Glyph *gp, *last;
820
821 if(sel.bx == -1) {
822 str = NULL;
823 } else {
824 bufsize = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
825 ptr = str = xmalloc(bufsize);
826
827 /* append every set & selected glyph to the selection */
828 for(y = sel.b.y; y < sel.e.y + 1; y++) {
829 gp = &term.line[y][0];
830 last = gp + term.col;
831
832 while(--last >= gp && !(selected(last - gp, y) && \
833 strcmp(last->c, " ") != 0))
834 /* nothing */;
835
836 for(x = 0; gp <= last; x++, ++gp) {
837 if(!selected(x, y)) {
838 continue;
839 }
840
841 size = utf8size(gp->c);
842 memcpy(ptr, gp->c, size);
843 ptr += size;
844 }
845
846 /*
847 * Copy and pasting of line endings is inconsistent
848 * in the inconsistent terminal and GUI world.
849 * The best solution seems like to produce '\n' when
850 * something is copied from st and convert '\n' to
851 * '\r', when something to be pasted is received by
852 * st.
853 * FIXME: Fix the computer world.
854 */
855 if(y < sel.e.y)
856 *ptr++ = '\n';
857 }
858 *ptr = 0;
859 }
860 xsetsel(str);
861 }
862
863 void
864 selnotify(XEvent *e) {
865 ulong nitems, ofs, rem;
866 int format;
867 uchar *data, *last, *repl;
868 Atom type;
869
870 ofs = 0;
871 do {
872 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
873 False, AnyPropertyType, &type, &format,
874 &nitems, &rem, &data)) {
875 fprintf(stderr, "Clipboard allocation failed\n");
876 return;
877 }
878
879 /*
880 * As seen in selcopy:
881 * Line endings are inconsistent in the terminal and GUI world
882 * copy and pasting. When receiving some selection data,
883 * replace all '\n' with '\r'.
884 * FIXME: Fix the computer world.
885 */
886 repl = data;
887 last = data + nitems * format / 8;
888 while((repl = memchr(repl, '\n', last - repl))) {
889 *repl++ = '\r';
890 }
891
892 ttywrite((const char *)data, nitems * format / 8);
893 XFree(data);
894 /* number of 32-bit chunks returned */
895 ofs += nitems * format / 32;
896 } while(rem > 0);
897 }
898
899 void
900 selpaste(const Arg *dummy) {
901 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
902 xw.win, CurrentTime);
903 }
904
905 void
906 clippaste(const Arg *dummy) {
907 Atom clipboard;
908
909 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
910 XConvertSelection(xw.dpy, clipboard, sel.xtarget, XA_PRIMARY,
911 xw.win, CurrentTime);
912 }
913
914 void
915 selclear(XEvent *e) {
916 if(sel.bx == -1)
917 return;
918 sel.bx = -1;
919 tsetdirt(sel.b.y, sel.e.y);
920 }
921
922 void
923 selrequest(XEvent *e) {
924 XSelectionRequestEvent *xsre;
925 XSelectionEvent xev;
926 Atom xa_targets, string;
927
928 xsre = (XSelectionRequestEvent *) e;
929 xev.type = SelectionNotify;
930 xev.requestor = xsre->requestor;
931 xev.selection = xsre->selection;
932 xev.target = xsre->target;
933 xev.time = xsre->time;
934 /* reject */
935 xev.property = None;
936
937 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
938 if(xsre->target == xa_targets) {
939 /* respond with the supported type */
940 string = sel.xtarget;
941 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
942 XA_ATOM, 32, PropModeReplace,
943 (uchar *) &string, 1);
944 xev.property = xsre->property;
945 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
946 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
947 xsre->target, 8, PropModeReplace,
948 (uchar *) sel.clip, strlen(sel.clip));
949 xev.property = xsre->property;
950 }
951
952 /* all done, send a notification to the listener */
953 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
954 fprintf(stderr, "Error sending SelectionNotify event\n");
955 }
956
957 void
958 xsetsel(char *str) {
959 /* register the selection for both the clipboard and the primary */
960 Atom clipboard;
961
962 free(sel.clip);
963 sel.clip = str;
964
965 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
966
967 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
968 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
969 }
970
971 void
972 brelease(XEvent *e) {
973 if(IS_SET(MODE_MOUSE)) {
974 mousereport(e);
975 return;
976 }
977
978 if(e->xbutton.button == Button2) {
979 selpaste(NULL);
980 } else if(e->xbutton.button == Button1) {
981 sel.mode = 0;
982 getbuttoninfo(e);
983 term.dirty[sel.ey] = 1;
984 if(sel.bx == sel.ex && sel.by == sel.ey) {
985 sel.bx = -1;
986 } else {
987 selcopy();
988 }
989 }
990 }
991
992 void
993 bmotion(XEvent *e) {
994 int oldey, oldex, oldsby, oldsey;
995
996 if(IS_SET(MODE_MOUSE)) {
997 mousereport(e);
998 return;
999 }
1000
1001 if(!sel.mode)
1002 return;
1003
1004 oldey = sel.ey;
1005 oldex = sel.ex;
1006 oldsby = sel.b.y;
1007 oldsey = sel.e.y;
1008 getbuttoninfo(e);
1009
1010 if(oldey != sel.ey || oldex != sel.ex) {
1011 tsetdirt(MIN(sel.b.y, oldsby), MAX(sel.e.y, oldsey));
1012 }
1013 }
1014
1015 void
1016 die(const char *errstr, ...) {
1017 va_list ap;
1018
1019 va_start(ap, errstr);
1020 vfprintf(stderr, errstr, ap);
1021 va_end(ap);
1022 exit(EXIT_FAILURE);
1023 }
1024
1025 void
1026 execsh(void) {
1027 char **args;
1028 char *envshell = getenv("SHELL");
1029 const struct passwd *pass = getpwuid(getuid());
1030 char buf[sizeof(long) * 8 + 1];
1031
1032 unsetenv("COLUMNS");
1033 unsetenv("LINES");
1034 unsetenv("TERMCAP");
1035
1036 if(pass) {
1037 setenv("LOGNAME", pass->pw_name, 1);
1038 setenv("USER", pass->pw_name, 1);
1039 setenv("SHELL", pass->pw_shell, 0);
1040 setenv("HOME", pass->pw_dir, 0);
1041 }
1042
1043 snprintf(buf, sizeof(buf), "%lu", xw.win);
1044 setenv("WINDOWID", buf, 1);
1045
1046 signal(SIGCHLD, SIG_DFL);
1047 signal(SIGHUP, SIG_DFL);
1048 signal(SIGINT, SIG_DFL);
1049 signal(SIGQUIT, SIG_DFL);
1050 signal(SIGTERM, SIG_DFL);
1051 signal(SIGALRM, SIG_DFL);
1052
1053 DEFAULT(envshell, shell);
1054 setenv("TERM", termname, 1);
1055 args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
1056 execvp(args[0], args);
1057 exit(EXIT_FAILURE);
1058 }
1059
1060 void
1061 sigchld(int a) {
1062 int stat = 0;
1063
1064 if(waitpid(pid, &stat, 0) < 0)
1065 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
1066
1067 if(WIFEXITED(stat)) {
1068 exit(WEXITSTATUS(stat));
1069 } else {
1070 exit(EXIT_FAILURE);
1071 }
1072 }
1073
1074 void
1075 ttynew(void) {
1076 int m, s;
1077 struct winsize w = {term.row, term.col, 0, 0};
1078
1079 /* seems to work fine on linux, openbsd and freebsd */
1080 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1081 die("openpty failed: %s\n", SERRNO);
1082
1083 switch(pid = fork()) {
1084 case -1:
1085 die("fork failed\n");
1086 break;
1087 case 0:
1088 setsid(); /* create a new process group */
1089 dup2(s, STDIN_FILENO);
1090 dup2(s, STDOUT_FILENO);
1091 dup2(s, STDERR_FILENO);
1092 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1093 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
1094 close(s);
1095 close(m);
1096 execsh();
1097 break;
1098 default:
1099 close(s);
1100 cmdfd = m;
1101 signal(SIGCHLD, sigchld);
1102 if(opt_io) {
1103 iofd = (!strcmp(opt_io, "-")) ?
1104 STDOUT_FILENO :
1105 open(opt_io, O_WRONLY | O_CREAT, 0666);
1106 if(iofd < 0) {
1107 fprintf(stderr, "Error opening %s:%s\n",
1108 opt_io, strerror(errno));
1109 }
1110 }
1111 }
1112 }
1113
1114 void
1115 dump(char c) {
1116 static int col;
1117
1118 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
1119 if(++col % 10 == 0)
1120 fprintf(stderr, "\n");
1121 }
1122
1123 void
1124 ttyread(void) {
1125 static char buf[BUFSIZ];
1126 static int buflen = 0;
1127 char *ptr;
1128 char s[UTF_SIZ];
1129 int charsize; /* size of utf8 char in bytes */
1130 long utf8c;
1131 int ret;
1132
1133 /* append read bytes to unprocessed bytes */
1134 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1135 die("Couldn't read from shell: %s\n", SERRNO);
1136
1137 /* process every complete utf8 char */
1138 buflen += ret;
1139 ptr = buf;
1140 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
1141 charsize = utf8decode(ptr, &utf8c);
1142 utf8encode(&utf8c, s);
1143 tputc(s, charsize);
1144 ptr += charsize;
1145 buflen -= charsize;
1146 }
1147
1148 /* keep any uncomplete utf8 char for the next call */
1149 memmove(buf, ptr, buflen);
1150 }
1151
1152 void
1153 ttywrite(const char *s, size_t n) {
1154 if(write(cmdfd, s, n) == -1)
1155 die("write error on tty: %s\n", SERRNO);
1156 }
1157
1158 void
1159 ttyresize(void) {
1160 struct winsize w;
1161
1162 w.ws_row = term.row;
1163 w.ws_col = term.col;
1164 w.ws_xpixel = xw.tw;
1165 w.ws_ypixel = xw.th;
1166 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1167 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
1168 }
1169
1170 void
1171 tsetdirt(int top, int bot) {
1172 int i;
1173
1174 LIMIT(top, 0, term.row-1);
1175 LIMIT(bot, 0, term.row-1);
1176
1177 for(i = top; i <= bot; i++)
1178 term.dirty[i] = 1;
1179 }
1180
1181 void
1182 tfulldirt(void) {
1183 tsetdirt(0, term.row-1);
1184 }
1185
1186 void
1187 tcursor(int mode) {
1188 static TCursor c;
1189
1190 if(mode == CURSOR_SAVE) {
1191 c = term.c;
1192 } else if(mode == CURSOR_LOAD) {
1193 term.c = c;
1194 tmoveto(c.x, c.y);
1195 }
1196 }
1197
1198 void
1199 treset(void) {
1200 uint i;
1201
1202 term.c = (TCursor){{
1203 .mode = ATTR_NULL,
1204 .fg = defaultfg,
1205 .bg = defaultbg
1206 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1207
1208 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1209 for(i = tabspaces; i < term.col; i += tabspaces)
1210 term.tabs[i] = 1;
1211 term.top = 0;
1212 term.bot = term.row - 1;
1213 term.mode = MODE_WRAP;
1214
1215 tclearregion(0, 0, term.col-1, term.row-1);
1216 tmoveto(0, 0);
1217 tcursor(CURSOR_SAVE);
1218 }
1219
1220 void
1221 tnew(int col, int row) {
1222 memset(&term, 0, sizeof(Term));
1223 tresize(col, row);
1224 term.numlock = 1;
1225
1226 treset();
1227 }
1228
1229 void
1230 tswapscreen(void) {
1231 Line *tmp = term.line;
1232
1233 term.line = term.alt;
1234 term.alt = tmp;
1235 term.mode ^= MODE_ALTSCREEN;
1236 tfulldirt();
1237 }
1238
1239 void
1240 tscrolldown(int orig, int n) {
1241 int i;
1242 Line temp;
1243
1244 LIMIT(n, 0, term.bot-orig+1);
1245
1246 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1247
1248 for(i = term.bot; i >= orig+n; i--) {
1249 temp = term.line[i];
1250 term.line[i] = term.line[i-n];
1251 term.line[i-n] = temp;
1252
1253 term.dirty[i] = 1;
1254 term.dirty[i-n] = 1;
1255 }
1256
1257 selscroll(orig, n);
1258 }
1259
1260 void
1261 tscrollup(int orig, int n) {
1262 int i;
1263 Line temp;
1264 LIMIT(n, 0, term.bot-orig+1);
1265
1266 tclearregion(0, orig, term.col-1, orig+n-1);
1267
1268 for(i = orig; i <= term.bot-n; i++) {
1269 temp = term.line[i];
1270 term.line[i] = term.line[i+n];
1271 term.line[i+n] = temp;
1272
1273 term.dirty[i] = 1;
1274 term.dirty[i+n] = 1;
1275 }
1276
1277 selscroll(orig, -n);
1278 }
1279
1280 void
1281 selscroll(int orig, int n) {
1282 if(sel.bx == -1)
1283 return;
1284
1285 if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
1286 if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
1287 sel.bx = -1;
1288 return;
1289 }
1290 if(sel.type == SEL_RECTANGULAR) {
1291 if(sel.by < term.top)
1292 sel.by = term.top;
1293 if(sel.ey > term.bot)
1294 sel.ey = term.bot;
1295 } else {
1296 if(sel.by < term.top) {
1297 sel.by = term.top;
1298 sel.bx = 0;
1299 }
1300 if(sel.ey > term.bot) {
1301 sel.ey = term.bot;
1302 sel.ex = term.col;
1303 }
1304 }
1305 sel.b.y = sel.by, sel.b.x = sel.bx;
1306 sel.e.y = sel.ey, sel.e.x = sel.ex;
1307 }
1308 }
1309
1310 void
1311 tnewline(int first_col) {
1312 int y = term.c.y;
1313
1314 if(y == term.bot) {
1315 tscrollup(term.top, 1);
1316 } else {
1317 y++;
1318 }
1319 tmoveto(first_col ? 0 : term.c.x, y);
1320 }
1321
1322 void
1323 csiparse(void) {
1324 char *p = csiescseq.buf, *np;
1325 long int v;
1326
1327 csiescseq.narg = 0;
1328 if(*p == '?') {
1329 csiescseq.priv = 1;
1330 p++;
1331 }
1332
1333 csiescseq.buf[csiescseq.len] = '\0';
1334 while(p < csiescseq.buf+csiescseq.len) {
1335 np = NULL;
1336 v = strtol(p, &np, 10);
1337 if(np == p)
1338 v = 0;
1339 if(v == LONG_MAX || v == LONG_MIN)
1340 v = -1;
1341 csiescseq.arg[csiescseq.narg++] = v;
1342 p = np;
1343 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1344 break;
1345 p++;
1346 }
1347 csiescseq.mode = *p;
1348 }
1349
1350 /* for absolute user moves, when decom is set */
1351 void
1352 tmoveato(int x, int y) {
1353 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1354 }
1355
1356 void
1357 tmoveto(int x, int y) {
1358 int miny, maxy;
1359
1360 if(term.c.state & CURSOR_ORIGIN) {
1361 miny = term.top;
1362 maxy = term.bot;
1363 } else {
1364 miny = 0;
1365 maxy = term.row - 1;
1366 }
1367 LIMIT(x, 0, term.col-1);
1368 LIMIT(y, miny, maxy);
1369 term.c.state &= ~CURSOR_WRAPNEXT;
1370 term.c.x = x;
1371 term.c.y = y;
1372 }
1373
1374 void
1375 tsetchar(char *c, Glyph *attr, int x, int y) {
1376 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1377 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1378 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1379 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1380 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1381 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1382 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1383 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1384 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1385 };
1386
1387 /*
1388 * The table is proudly stolen from rxvt.
1389 */
1390 if(attr->mode & ATTR_GFX) {
1391 if(c[0] >= 0x41 && c[0] <= 0x7e
1392 && vt100_0[c[0] - 0x41]) {
1393 c = vt100_0[c[0] - 0x41];
1394 }
1395 }
1396
1397 term.dirty[y] = 1;
1398 term.line[y][x] = *attr;
1399 memcpy(term.line[y][x].c, c, UTF_SIZ);
1400 }
1401
1402 void
1403 tclearregion(int x1, int y1, int x2, int y2) {
1404 int x, y, temp;
1405
1406 if(x1 > x2)
1407 temp = x1, x1 = x2, x2 = temp;
1408 if(y1 > y2)
1409 temp = y1, y1 = y2, y2 = temp;
1410
1411 LIMIT(x1, 0, term.col-1);
1412 LIMIT(x2, 0, term.col-1);
1413 LIMIT(y1, 0, term.row-1);
1414 LIMIT(y2, 0, term.row-1);
1415
1416 for(y = y1; y <= y2; y++) {
1417 term.dirty[y] = 1;
1418 for(x = x1; x <= x2; x++) {
1419 term.line[y][x] = term.c.attr;
1420 memcpy(term.line[y][x].c, " ", 2);
1421 }
1422 }
1423 }
1424
1425 void
1426 tdeletechar(int n) {
1427 int src = term.c.x + n;
1428 int dst = term.c.x;
1429 int size = term.col - src;
1430
1431 term.dirty[term.c.y] = 1;
1432
1433 if(src >= term.col) {
1434 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1435 return;
1436 }
1437
1438 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1439 size * sizeof(Glyph));
1440 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1441 }
1442
1443 void
1444 tinsertblank(int n) {
1445 int src = term.c.x;
1446 int dst = src + n;
1447 int size = term.col - dst;
1448
1449 term.dirty[term.c.y] = 1;
1450
1451 if(dst >= term.col) {
1452 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1453 return;
1454 }
1455
1456 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1457 size * sizeof(Glyph));
1458 tclearregion(src, term.c.y, dst - 1, term.c.y);
1459 }
1460
1461 void
1462 tinsertblankline(int n) {
1463 if(term.c.y < term.top || term.c.y > term.bot)
1464 return;
1465
1466 tscrolldown(term.c.y, n);
1467 }
1468
1469 void
1470 tdeleteline(int n) {
1471 if(term.c.y < term.top || term.c.y > term.bot)
1472 return;
1473
1474 tscrollup(term.c.y, n);
1475 }
1476
1477 void
1478 tsetattr(int *attr, int l) {
1479 int i;
1480
1481 for(i = 0; i < l; i++) {
1482 switch(attr[i]) {
1483 case 0:
1484 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE \
1485 | ATTR_BOLD | ATTR_ITALIC \
1486 | ATTR_BLINK);
1487 term.c.attr.fg = defaultfg;
1488 term.c.attr.bg = defaultbg;
1489 break;
1490 case 1:
1491 term.c.attr.mode |= ATTR_BOLD;
1492 break;
1493 case 3:
1494 term.c.attr.mode |= ATTR_ITALIC;
1495 break;
1496 case 4:
1497 term.c.attr.mode |= ATTR_UNDERLINE;
1498 break;
1499 case 5: /* slow blink */
1500 case 6: /* rapid blink */
1501 term.c.attr.mode |= ATTR_BLINK;
1502 break;
1503 case 7:
1504 term.c.attr.mode |= ATTR_REVERSE;
1505 break;
1506 case 21:
1507 case 22:
1508 term.c.attr.mode &= ~ATTR_BOLD;
1509 break;
1510 case 23:
1511 term.c.attr.mode &= ~ATTR_ITALIC;
1512 break;
1513 case 24:
1514 term.c.attr.mode &= ~ATTR_UNDERLINE;
1515 break;
1516 case 25:
1517 case 26:
1518 term.c.attr.mode &= ~ATTR_BLINK;
1519 break;
1520 case 27:
1521 term.c.attr.mode &= ~ATTR_REVERSE;
1522 break;
1523 case 38:
1524 if(i + 2 < l && attr[i + 1] == 5) {
1525 i += 2;
1526 if(BETWEEN(attr[i], 0, 255)) {
1527 term.c.attr.fg = attr[i];
1528 } else {
1529 fprintf(stderr,
1530 "erresc: bad fgcolor %d\n",
1531 attr[i]);
1532 }
1533 } else {
1534 fprintf(stderr,
1535 "erresc(38): gfx attr %d unknown\n",
1536 attr[i]);
1537 }
1538 break;
1539 case 39:
1540 term.c.attr.fg = defaultfg;
1541 break;
1542 case 48:
1543 if(i + 2 < l && attr[i + 1] == 5) {
1544 i += 2;
1545 if(BETWEEN(attr[i], 0, 255)) {
1546 term.c.attr.bg = attr[i];
1547 } else {
1548 fprintf(stderr,
1549 "erresc: bad bgcolor %d\n",
1550 attr[i]);
1551 }
1552 } else {
1553 fprintf(stderr,
1554 "erresc(48): gfx attr %d unknown\n",
1555 attr[i]);
1556 }
1557 break;
1558 case 49:
1559 term.c.attr.bg = defaultbg;
1560 break;
1561 default:
1562 if(BETWEEN(attr[i], 30, 37)) {
1563 term.c.attr.fg = attr[i] - 30;
1564 } else if(BETWEEN(attr[i], 40, 47)) {
1565 term.c.attr.bg = attr[i] - 40;
1566 } else if(BETWEEN(attr[i], 90, 97)) {
1567 term.c.attr.fg = attr[i] - 90 + 8;
1568 } else if(BETWEEN(attr[i], 100, 107)) {
1569 term.c.attr.bg = attr[i] - 100 + 8;
1570 } else {
1571 fprintf(stderr,
1572 "erresc(default): gfx attr %d unknown\n",
1573 attr[i]), csidump();
1574 }
1575 break;
1576 }
1577 }
1578 }
1579
1580 void
1581 tsetscroll(int t, int b) {
1582 int temp;
1583
1584 LIMIT(t, 0, term.row-1);
1585 LIMIT(b, 0, term.row-1);
1586 if(t > b) {
1587 temp = t;
1588 t = b;
1589 b = temp;
1590 }
1591 term.top = t;
1592 term.bot = b;
1593 }
1594
1595 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1596
1597 void
1598 tsetmode(bool priv, bool set, int *args, int narg) {
1599 int *lim, mode;
1600 bool alt;
1601
1602 for(lim = args + narg; args < lim; ++args) {
1603 if(priv) {
1604 switch(*args) {
1605 break;
1606 case 1: /* DECCKM -- Cursor key */
1607 MODBIT(term.mode, set, MODE_APPCURSOR);
1608 break;
1609 case 5: /* DECSCNM -- Reverse video */
1610 mode = term.mode;
1611 MODBIT(term.mode, set, MODE_REVERSE);
1612 if(mode != term.mode)
1613 redraw(REDRAW_TIMEOUT);
1614 break;
1615 case 6: /* DECOM -- Origin */
1616 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1617 tmoveato(0, 0);
1618 break;
1619 case 7: /* DECAWM -- Auto wrap */
1620 MODBIT(term.mode, set, MODE_WRAP);
1621 break;
1622 case 0: /* Error (IGNORED) */
1623 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1624 case 3: /* DECCOLM -- Column (IGNORED) */
1625 case 4: /* DECSCLM -- Scroll (IGNORED) */
1626 case 8: /* DECARM -- Auto repeat (IGNORED) */
1627 case 18: /* DECPFF -- Printer feed (IGNORED) */
1628 case 19: /* DECPEX -- Printer extent (IGNORED) */
1629 case 42: /* DECNRCM -- National characters (IGNORED) */
1630 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1631 break;
1632 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1633 MODBIT(term.mode, !set, MODE_HIDE);
1634 break;
1635 case 1000: /* 1000,1002: enable xterm mouse report */
1636 MODBIT(term.mode, set, MODE_MOUSEBTN);
1637 MODBIT(term.mode, 0, MODE_MOUSEMOTION);
1638 break;
1639 case 1002:
1640 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1641 MODBIT(term.mode, 0, MODE_MOUSEBTN);
1642 break;
1643 case 1006:
1644 MODBIT(term.mode, set, MODE_MOUSESGR);
1645 break;
1646 case 1049: /* = 1047 and 1048 */
1647 case 47:
1648 case 1047:
1649 if (!allowaltscreen)
1650 break;
1651
1652 alt = IS_SET(MODE_ALTSCREEN);
1653 if(alt) {
1654 tclearregion(0, 0, term.col-1,
1655 term.row-1);
1656 }
1657 if(set ^ alt) /* set is always 1 or 0 */
1658 tswapscreen();
1659 if(*args != 1049)
1660 break;
1661 /* FALLTRU */
1662 case 1048:
1663 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1664 break;
1665 default:
1666 fprintf(stderr,
1667 "erresc: unknown private set/reset mode %d\n",
1668 *args);
1669 break;
1670 }
1671 } else {
1672 switch(*args) {
1673 case 0: /* Error (IGNORED) */
1674 break;
1675 case 2: /* KAM -- keyboard action */
1676 MODBIT(term.mode, set, MODE_KBDLOCK);
1677 break;
1678 case 4: /* IRM -- Insertion-replacement */
1679 MODBIT(term.mode, set, MODE_INSERT);
1680 break;
1681 case 12: /* SRM -- Send/Receive */
1682 MODBIT(term.mode, !set, MODE_ECHO);
1683 break;
1684 case 20: /* LNM -- Linefeed/new line */
1685 MODBIT(term.mode, set, MODE_CRLF);
1686 break;
1687 default:
1688 fprintf(stderr,
1689 "erresc: unknown set/reset mode %d\n",
1690 *args);
1691 break;
1692 }
1693 }
1694 }
1695 }
1696 #undef MODBIT
1697
1698
1699 void
1700 csihandle(void) {
1701 switch(csiescseq.mode) {
1702 default:
1703 unknown:
1704 fprintf(stderr, "erresc: unknown csi ");
1705 csidump();
1706 /* die(""); */
1707 break;
1708 case '@': /* ICH -- Insert <n> blank char */
1709 DEFAULT(csiescseq.arg[0], 1);
1710 tinsertblank(csiescseq.arg[0]);
1711 break;
1712 case 'A': /* CUU -- Cursor <n> Up */
1713 DEFAULT(csiescseq.arg[0], 1);
1714 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1715 break;
1716 case 'B': /* CUD -- Cursor <n> Down */
1717 case 'e': /* VPR --Cursor <n> Down */
1718 DEFAULT(csiescseq.arg[0], 1);
1719 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1720 break;
1721 case 'c': /* DA -- Device Attributes */
1722 if(csiescseq.arg[0] == 0)
1723 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1724 break;
1725 case 'C': /* CUF -- Cursor <n> Forward */
1726 case 'a': /* HPR -- Cursor <n> Forward */
1727 DEFAULT(csiescseq.arg[0], 1);
1728 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1729 break;
1730 case 'D': /* CUB -- Cursor <n> Backward */
1731 DEFAULT(csiescseq.arg[0], 1);
1732 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1733 break;
1734 case 'E': /* CNL -- Cursor <n> Down and first col */
1735 DEFAULT(csiescseq.arg[0], 1);
1736 tmoveto(0, term.c.y+csiescseq.arg[0]);
1737 break;
1738 case 'F': /* CPL -- Cursor <n> Up and first col */
1739 DEFAULT(csiescseq.arg[0], 1);
1740 tmoveto(0, term.c.y-csiescseq.arg[0]);
1741 break;
1742 case 'g': /* TBC -- Tabulation clear */
1743 switch(csiescseq.arg[0]) {
1744 case 0: /* clear current tab stop */
1745 term.tabs[term.c.x] = 0;
1746 break;
1747 case 3: /* clear all the tabs */
1748 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1749 break;
1750 default:
1751 goto unknown;
1752 }
1753 break;
1754 case 'G': /* CHA -- Move to <col> */
1755 case '`': /* HPA */
1756 DEFAULT(csiescseq.arg[0], 1);
1757 tmoveto(csiescseq.arg[0]-1, term.c.y);
1758 break;
1759 case 'H': /* CUP -- Move to <row> <col> */
1760 case 'f': /* HVP */
1761 DEFAULT(csiescseq.arg[0], 1);
1762 DEFAULT(csiescseq.arg[1], 1);
1763 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1764 break;
1765 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1766 DEFAULT(csiescseq.arg[0], 1);
1767 while(csiescseq.arg[0]--)
1768 tputtab(1);
1769 break;
1770 case 'J': /* ED -- Clear screen */
1771 sel.bx = -1;
1772 switch(csiescseq.arg[0]) {
1773 case 0: /* below */
1774 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1775 if(term.c.y < term.row-1) {
1776 tclearregion(0, term.c.y+1, term.col-1,
1777 term.row-1);
1778 }
1779 break;
1780 case 1: /* above */
1781 if(term.c.y > 1)
1782 tclearregion(0, 0, term.col-1, term.c.y-1);
1783 tclearregion(0, term.c.y, term.c.x, term.c.y);
1784 break;
1785 case 2: /* all */
1786 tclearregion(0, 0, term.col-1, term.row-1);
1787 break;
1788 default:
1789 goto unknown;
1790 }
1791 break;
1792 case 'K': /* EL -- Clear line */
1793 switch(csiescseq.arg[0]) {
1794 case 0: /* right */
1795 tclearregion(term.c.x, term.c.y, term.col-1,
1796 term.c.y);
1797 break;
1798 case 1: /* left */
1799 tclearregion(0, term.c.y, term.c.x, term.c.y);
1800 break;
1801 case 2: /* all */
1802 tclearregion(0, term.c.y, term.col-1, term.c.y);
1803 break;
1804 }
1805 break;
1806 case 'S': /* SU -- Scroll <n> line up */
1807 DEFAULT(csiescseq.arg[0], 1);
1808 tscrollup(term.top, csiescseq.arg[0]);
1809 break;
1810 case 'T': /* SD -- Scroll <n> line down */
1811 DEFAULT(csiescseq.arg[0], 1);
1812 tscrolldown(term.top, csiescseq.arg[0]);
1813 break;
1814 case 'L': /* IL -- Insert <n> blank lines */
1815 DEFAULT(csiescseq.arg[0], 1);
1816 tinsertblankline(csiescseq.arg[0]);
1817 break;
1818 case 'l': /* RM -- Reset Mode */
1819 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
1820 break;
1821 case 'M': /* DL -- Delete <n> lines */
1822 DEFAULT(csiescseq.arg[0], 1);
1823 tdeleteline(csiescseq.arg[0]);
1824 break;
1825 case 'X': /* ECH -- Erase <n> char */
1826 DEFAULT(csiescseq.arg[0], 1);
1827 tclearregion(term.c.x, term.c.y,
1828 term.c.x + csiescseq.arg[0] - 1, term.c.y);
1829 break;
1830 case 'P': /* DCH -- Delete <n> char */
1831 DEFAULT(csiescseq.arg[0], 1);
1832 tdeletechar(csiescseq.arg[0]);
1833 break;
1834 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
1835 DEFAULT(csiescseq.arg[0], 1);
1836 while(csiescseq.arg[0]--)
1837 tputtab(0);
1838 break;
1839 case 'd': /* VPA -- Move to <row> */
1840 DEFAULT(csiescseq.arg[0], 1);
1841 tmoveato(term.c.x, csiescseq.arg[0]-1);
1842 break;
1843 case 'h': /* SM -- Set terminal mode */
1844 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
1845 break;
1846 case 'm': /* SGR -- Terminal attribute (color) */
1847 tsetattr(csiescseq.arg, csiescseq.narg);
1848 break;
1849 case 'r': /* DECSTBM -- Set Scrolling Region */
1850 if(csiescseq.priv) {
1851 goto unknown;
1852 } else {
1853 DEFAULT(csiescseq.arg[0], 1);
1854 DEFAULT(csiescseq.arg[1], term.row);
1855 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
1856 tmoveato(0, 0);
1857 }
1858 break;
1859 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1860 tcursor(CURSOR_SAVE);
1861 break;
1862 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1863 tcursor(CURSOR_LOAD);
1864 break;
1865 }
1866 }
1867
1868 void
1869 csidump(void) {
1870 int i;
1871 uint c;
1872
1873 printf("ESC[");
1874 for(i = 0; i < csiescseq.len; i++) {
1875 c = csiescseq.buf[i] & 0xff;
1876 if(isprint(c)) {
1877 putchar(c);
1878 } else if(c == '\n') {
1879 printf("(\\n)");
1880 } else if(c == '\r') {
1881 printf("(\\r)");
1882 } else if(c == 0x1b) {
1883 printf("(\\e)");
1884 } else {
1885 printf("(%02x)", c);
1886 }
1887 }
1888 putchar('\n');
1889 }
1890
1891 void
1892 csireset(void) {
1893 memset(&csiescseq, 0, sizeof(csiescseq));
1894 }
1895
1896 void
1897 strhandle(void) {
1898 char *p = NULL;
1899 int i, j, narg;
1900
1901 strparse();
1902 narg = strescseq.narg;
1903
1904 switch(strescseq.type) {
1905 case ']': /* OSC -- Operating System Command */
1906 switch(i = atoi(strescseq.args[0])) {
1907 case 0:
1908 case 1:
1909 case 2:
1910 if(narg > 1)
1911 xsettitle(strescseq.args[1]);
1912 break;
1913 case 4: /* color set */
1914 if(narg < 3)
1915 break;
1916 p = strescseq.args[2];
1917 /* fall through */
1918 case 104: /* color reset, here p = NULL */
1919 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
1920 if (!xsetcolorname(j, p)) {
1921 fprintf(stderr, "erresc: invalid color %s\n", p);
1922 } else {
1923 /*
1924 * TODO if defaultbg color is changed, borders
1925 * are dirty
1926 */
1927 redraw(0);
1928 }
1929 break;
1930 default:
1931 fprintf(stderr, "erresc: unknown str ");
1932 strdump();
1933 break;
1934 }
1935 break;
1936 case 'k': /* old title set compatibility */
1937 xsettitle(strescseq.args[0]);
1938 break;
1939 case 'P': /* DSC -- Device Control String */
1940 case '_': /* APC -- Application Program Command */
1941 case '^': /* PM -- Privacy Message */
1942 default:
1943 fprintf(stderr, "erresc: unknown str ");
1944 strdump();
1945 /* die(""); */
1946 break;
1947 }
1948 }
1949
1950 void
1951 strparse(void) {
1952 char *p = strescseq.buf;
1953
1954 strescseq.narg = 0;
1955 strescseq.buf[strescseq.len] = '\0';
1956 while(p && strescseq.narg < STR_ARG_SIZ)
1957 strescseq.args[strescseq.narg++] = strsep(&p, ";");
1958 }
1959
1960 void
1961 strdump(void) {
1962 int i;
1963 uint c;
1964
1965 printf("ESC%c", strescseq.type);
1966 for(i = 0; i < strescseq.len; i++) {
1967 c = strescseq.buf[i] & 0xff;
1968 if(c == '\0') {
1969 return;
1970 } else if(isprint(c)) {
1971 putchar(c);
1972 } else if(c == '\n') {
1973 printf("(\\n)");
1974 } else if(c == '\r') {
1975 printf("(\\r)");
1976 } else if(c == 0x1b) {
1977 printf("(\\e)");
1978 } else {
1979 printf("(%02x)", c);
1980 }
1981 }
1982 printf("ESC\\\n");
1983 }
1984
1985 void
1986 strreset(void) {
1987 memset(&strescseq, 0, sizeof(strescseq));
1988 }
1989
1990 void
1991 tputtab(bool forward) {
1992 uint x = term.c.x;
1993
1994 if(forward) {
1995 if(x == term.col)
1996 return;
1997 for(++x; x < term.col && !term.tabs[x]; ++x)
1998 /* nothing */ ;
1999 } else {
2000 if(x == 0)
2001 return;
2002 for(--x; x > 0 && !term.tabs[x]; --x)
2003 /* nothing */ ;
2004 }
2005 tmoveto(x, term.c.y);
2006 }
2007
2008 void
2009 techo(char *buf, int len) {
2010 for(; len > 0; buf++, len--) {
2011 char c = *buf;
2012
2013 if(c == '\033') { /* escape */
2014 tputc("^", 1);
2015 tputc("[", 1);
2016 } else if(c < '\x20') { /* control code */
2017 if(c != '\n' && c != '\r' && c != '\t') {
2018 c |= '\x40';
2019 tputc("^", 1);
2020 }
2021 tputc(&c, 1);
2022 } else {
2023 break;
2024 }
2025 }
2026 if(len)
2027 tputc(buf, len);
2028 }
2029
2030 void
2031 tputc(char *c, int len) {
2032 uchar ascii = *c;
2033 bool control = ascii < '\x20' || ascii == 0177;
2034
2035 if(iofd != -1) {
2036 if(xwrite(iofd, c, len) < 0) {
2037 fprintf(stderr, "Error writing in %s:%s\n",
2038 opt_io, strerror(errno));
2039 close(iofd);
2040 iofd = -1;
2041 }
2042 }
2043
2044 /*
2045 * STR sequences must be checked before anything else
2046 * because it can use some control codes as part of the sequence.
2047 */
2048 if(term.esc & ESC_STR) {
2049 switch(ascii) {
2050 case '\033':
2051 term.esc = ESC_START | ESC_STR_END;
2052 break;
2053 case '\a': /* backwards compatibility to xterm */
2054 term.esc = 0;
2055 strhandle();
2056 break;
2057 default:
2058 if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2059 memmove(&strescseq.buf[strescseq.len], c, len);
2060 strescseq.len += len;
2061 } else {
2062 /*
2063 * Here is a bug in terminals. If the user never sends
2064 * some code to stop the str or esc command, then st
2065 * will stop responding. But this is better than
2066 * silently failing with unknown characters. At least
2067 * then users will report back.
2068 *
2069 * In the case users ever get fixed, here is the code:
2070 */
2071 /*
2072 * term.esc = 0;
2073 * strhandle();
2074 */
2075 }
2076 }
2077 return;
2078 }
2079
2080 /*
2081 * Actions of control codes must be performed as soon they arrive
2082 * because they can be embedded inside a control sequence, and
2083 * they must not cause conflicts with sequences.
2084 */
2085 if(control) {
2086 switch(ascii) {
2087 case '\t': /* HT */
2088 tputtab(1);
2089 return;
2090 case '\b': /* BS */
2091 tmoveto(term.c.x-1, term.c.y);
2092 return;
2093 case '\r': /* CR */
2094 tmoveto(0, term.c.y);
2095 return;
2096 case '\f': /* LF */
2097 case '\v': /* VT */
2098 case '\n': /* LF */
2099 /* go to first col if the mode is set */
2100 tnewline(IS_SET(MODE_CRLF));
2101 return;
2102 case '\a': /* BEL */
2103 if(!(xw.state & WIN_FOCUSED))
2104 xseturgency(1);
2105 return;
2106 case '\033': /* ESC */
2107 csireset();
2108 term.esc = ESC_START;
2109 return;
2110 case '\016': /* SO */
2111 case '\017': /* SI */
2112 /*
2113 * Different charsets are hard to handle. Applications
2114 * should use the right alt charset escapes for the
2115 * only reason they still exist: line drawing. The
2116 * rest is incompatible history st should not support.
2117 */
2118 return;
2119 case '\032': /* SUB */
2120 case '\030': /* CAN */
2121 csireset();
2122 return;
2123 case '\005': /* ENQ (IGNORED) */
2124 case '\000': /* NUL (IGNORED) */
2125 case '\021': /* XON (IGNORED) */
2126 case '\023': /* XOFF (IGNORED) */
2127 case 0177: /* DEL (IGNORED) */
2128 return;
2129 }
2130 } else if(term.esc & ESC_START) {
2131 if(term.esc & ESC_CSI) {
2132 csiescseq.buf[csiescseq.len++] = ascii;
2133 if(BETWEEN(ascii, 0x40, 0x7E)
2134 || csiescseq.len >= \
2135 sizeof(csiescseq.buf)-1) {
2136 term.esc = 0;
2137 csiparse();
2138 csihandle();
2139 }
2140 } else if(term.esc & ESC_STR_END) {
2141 term.esc = 0;
2142 if(ascii == '\\')
2143 strhandle();
2144 } else if(term.esc & ESC_ALTCHARSET) {
2145 switch(ascii) {
2146 case '0': /* Line drawing set */
2147 term.c.attr.mode |= ATTR_GFX;
2148 break;
2149 case 'B': /* USASCII */
2150 term.c.attr.mode &= ~ATTR_GFX;
2151 break;
2152 case 'A': /* UK (IGNORED) */
2153 case '<': /* multinational charset (IGNORED) */
2154 case '5': /* Finnish (IGNORED) */
2155 case 'C': /* Finnish (IGNORED) */
2156 case 'K': /* German (IGNORED) */
2157 break;
2158 default:
2159 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2160 }
2161 term.esc = 0;
2162 } else if(term.esc & ESC_TEST) {
2163 if(ascii == '8') { /* DEC screen alignment test. */
2164 char E[UTF_SIZ] = "E";
2165 int x, y;
2166
2167 for(x = 0; x < term.col; ++x) {
2168 for(y = 0; y < term.row; ++y)
2169 tsetchar(E, &term.c.attr, x, y);
2170 }
2171 }
2172 term.esc = 0;
2173 } else {
2174 switch(ascii) {
2175 case '[':
2176 term.esc |= ESC_CSI;
2177 break;
2178 case '#':
2179 term.esc |= ESC_TEST;
2180 break;
2181 case 'P': /* DCS -- Device Control String */
2182 case '_': /* APC -- Application Program Command */
2183 case '^': /* PM -- Privacy Message */
2184 case ']': /* OSC -- Operating System Command */
2185 case 'k': /* old title set compatibility */
2186 strreset();
2187 strescseq.type = ascii;
2188 term.esc |= ESC_STR;
2189 break;
2190 case '(': /* set primary charset G0 */
2191 term.esc |= ESC_ALTCHARSET;
2192 break;
2193 case ')': /* set secondary charset G1 (IGNORED) */
2194 case '*': /* set tertiary charset G2 (IGNORED) */
2195 case '+': /* set quaternary charset G3 (IGNORED) */
2196 term.esc = 0;
2197 break;
2198 case 'D': /* IND -- Linefeed */
2199 if(term.c.y == term.bot) {
2200 tscrollup(term.top, 1);
2201 } else {
2202 tmoveto(term.c.x, term.c.y+1);
2203 }
2204 term.esc = 0;
2205 break;
2206 case 'E': /* NEL -- Next line */
2207 tnewline(1); /* always go to first col */
2208 term.esc = 0;
2209 break;
2210 case 'H': /* HTS -- Horizontal tab stop */
2211 term.tabs[term.c.x] = 1;
2212 term.esc = 0;
2213 break;
2214 case 'M': /* RI -- Reverse index */
2215 if(term.c.y == term.top) {
2216 tscrolldown(term.top, 1);
2217 } else {
2218 tmoveto(term.c.x, term.c.y-1);
2219 }
2220 term.esc = 0;
2221 break;
2222 case 'Z': /* DECID -- Identify Terminal */
2223 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2224 term.esc = 0;
2225 break;
2226 case 'c': /* RIS -- Reset to inital state */
2227 treset();
2228 term.esc = 0;
2229 xresettitle();
2230 break;
2231 case '=': /* DECPAM -- Application keypad */
2232 term.mode |= MODE_APPKEYPAD;
2233 term.esc = 0;
2234 break;
2235 case '>': /* DECPNM -- Normal keypad */
2236 term.mode &= ~MODE_APPKEYPAD;
2237 term.esc = 0;
2238 break;
2239 case '7': /* DECSC -- Save Cursor */
2240 tcursor(CURSOR_SAVE);
2241 term.esc = 0;
2242 break;
2243 case '8': /* DECRC -- Restore Cursor */
2244 tcursor(CURSOR_LOAD);
2245 term.esc = 0;
2246 break;
2247 case '\\': /* ST -- Stop */
2248 term.esc = 0;
2249 break;
2250 default:
2251 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2252 (uchar) ascii, isprint(ascii)? ascii:'.');
2253 term.esc = 0;
2254 }
2255 }
2256 /*
2257 * All characters which form part of a sequence are not
2258 * printed
2259 */
2260 return;
2261 }
2262 /*
2263 * Display control codes only if we are in graphic mode
2264 */
2265 if(control && !(term.c.attr.mode & ATTR_GFX))
2266 return;
2267 if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
2268 sel.bx = -1;
2269 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
2270 tnewline(1); /* always go to first col */
2271
2272 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col) {
2273 memmove(&term.line[term.c.y][term.c.x+1],
2274 &term.line[term.c.y][term.c.x],
2275 (term.col - term.c.x - 1) * sizeof(Glyph));
2276 }
2277
2278 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2279 if(term.c.x+1 < term.col) {
2280 tmoveto(term.c.x+1, term.c.y);
2281 } else {
2282 term.c.state |= CURSOR_WRAPNEXT;
2283 }
2284 }
2285
2286 int
2287 tresize(int col, int row) {
2288 int i;
2289 int minrow = MIN(row, term.row);
2290 int mincol = MIN(col, term.col);
2291 int slide = term.c.y - row + 1;
2292 bool *bp;
2293 Line *orig;
2294
2295 if(col < 1 || row < 1)
2296 return 0;
2297
2298 /* free unneeded rows */
2299 i = 0;
2300 if(slide > 0) {
2301 /*
2302 * slide screen to keep cursor where we expect it -
2303 * tscrollup would work here, but we can optimize to
2304 * memmove because we're freeing the earlier lines
2305 */
2306 for(/* i = 0 */; i < slide; i++) {
2307 free(term.line[i]);
2308 free(term.alt[i]);
2309 }
2310 memmove(term.line, term.line + slide, row * sizeof(Line));
2311 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2312 }
2313 for(i += row; i < term.row; i++) {
2314 free(term.line[i]);
2315 free(term.alt[i]);
2316 }
2317
2318 /* resize to new height */
2319 term.line = xrealloc(term.line, row * sizeof(Line));
2320 term.alt = xrealloc(term.alt, row * sizeof(Line));
2321 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2322 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2323
2324 /* resize each row to new width, zero-pad if needed */
2325 for(i = 0; i < minrow; i++) {
2326 term.dirty[i] = 1;
2327 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2328 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2329 }
2330
2331 /* allocate any new rows */
2332 for(/* i == minrow */; i < row; i++) {
2333 term.dirty[i] = 1;
2334 term.line[i] = xcalloc(col, sizeof(Glyph));
2335 term.alt [i] = xcalloc(col, sizeof(Glyph));
2336 }
2337 if(col > term.col) {
2338 bp = term.tabs + term.col;
2339
2340 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2341 while(--bp > term.tabs && !*bp)
2342 /* nothing */ ;
2343 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2344 *bp = 1;
2345 }
2346 /* update terminal size */
2347 term.col = col;
2348 term.row = row;
2349 /* reset scrolling region */
2350 tsetscroll(0, row-1);
2351 /* make use of the LIMIT in tmoveto */
2352 tmoveto(term.c.x, term.c.y);
2353 /* Clearing both screens */
2354 orig = term.line;
2355 do {
2356 if(mincol < col && 0 < minrow) {
2357 tclearregion(mincol, 0, col - 1, minrow - 1);
2358 }
2359 if(0 < col && minrow < row) {
2360 tclearregion(0, minrow, col - 1, row - 1);
2361 }
2362 tswapscreen();
2363 } while(orig != term.line);
2364
2365 return (slide > 0);
2366 }
2367
2368 void
2369 xresize(int col, int row) {
2370 xw.tw = MAX(1, col * xw.cw);
2371 xw.th = MAX(1, row * xw.ch);
2372
2373 XFreePixmap(xw.dpy, xw.buf);
2374 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2375 DefaultDepth(xw.dpy, xw.scr));
2376 XftDrawChange(xw.draw, xw.buf);
2377 xclear(0, 0, xw.w, xw.h);
2378 }
2379
2380 static inline ushort
2381 sixd_to_16bit(int x) {
2382 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2383 }
2384
2385 void
2386 xloadcols(void) {
2387 int i, r, g, b;
2388 XRenderColor color = { .alpha = 0xffff };
2389
2390 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
2391 for(i = 0; i < LEN(colorname); i++) {
2392 if(!colorname[i])
2393 continue;
2394 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2395 die("Could not allocate color '%s'\n", colorname[i]);
2396 }
2397 }
2398
2399 /* load colors [16-255] ; same colors as xterm */
2400 for(i = 16, r = 0; r < 6; r++) {
2401 for(g = 0; g < 6; g++) {
2402 for(b = 0; b < 6; b++) {
2403 color.red = sixd_to_16bit(r);
2404 color.green = sixd_to_16bit(g);
2405 color.blue = sixd_to_16bit(b);
2406 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i])) {
2407 die("Could not allocate color %d\n", i);
2408 }
2409 i++;
2410 }
2411 }
2412 }
2413
2414 for(r = 0; r < 24; r++, i++) {
2415 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
2416 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color,
2417 &dc.col[i])) {
2418 die("Could not allocate color %d\n", i);
2419 }
2420 }
2421 }
2422
2423 int
2424 xsetcolorname(int x, const char *name) {
2425 XRenderColor color = { .alpha = 0xffff };
2426 Colour colour;
2427 if (x < 0 || x > LEN(colorname))
2428 return -1;
2429 if(!name) {
2430 if(16 <= x && x < 16 + 216) {
2431 int r = (x - 16) / 36, g = ((x - 16) % 36) / 6, b = (x - 16) % 6;
2432 color.red = sixd_to_16bit(r);
2433 color.green = sixd_to_16bit(g);
2434 color.blue = sixd_to_16bit(b);
2435 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2436 return 0; /* something went wrong */
2437 dc.col[x] = colour;
2438 return 1;
2439 } else if (16 + 216 <= x && x < 256) {
2440 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (x - (16 + 216));
2441 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2442 return 0; /* something went wrong */
2443 dc.col[x] = colour;
2444 return 1;
2445 } else {
2446 name = colorname[x];
2447 }
2448 }
2449 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &colour))
2450 return 0;
2451 dc.col[x] = colour;
2452 return 1;
2453 }
2454
2455 void
2456 xtermclear(int col1, int row1, int col2, int row2) {
2457 XftDrawRect(xw.draw,
2458 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2459 borderpx + col1 * xw.cw,
2460 borderpx + row1 * xw.ch,
2461 (col2-col1+1) * xw.cw,
2462 (row2-row1+1) * xw.ch);
2463 }
2464
2465 /*
2466 * Absolute coordinates.
2467 */
2468 void
2469 xclear(int x1, int y1, int x2, int y2) {
2470 XftDrawRect(xw.draw,
2471 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2472 x1, y1, x2-x1, y2-y1);
2473 }
2474
2475 void
2476 xhints(void) {
2477 XClassHint class = {opt_class ? opt_class : termname, termname};
2478 XWMHints wm = {.flags = InputHint, .input = 1};
2479 XSizeHints *sizeh = NULL;
2480
2481 sizeh = XAllocSizeHints();
2482 if(xw.isfixed == False) {
2483 sizeh->flags = PSize | PResizeInc | PBaseSize;
2484 sizeh->height = xw.h;
2485 sizeh->width = xw.w;
2486 sizeh->height_inc = xw.ch;
2487 sizeh->width_inc = xw.cw;
2488 sizeh->base_height = 2 * borderpx;
2489 sizeh->base_width = 2 * borderpx;
2490 } else {
2491 sizeh->flags = PMaxSize | PMinSize;
2492 sizeh->min_width = sizeh->max_width = xw.fw;
2493 sizeh->min_height = sizeh->max_height = xw.fh;
2494 }
2495
2496 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
2497 XFree(sizeh);
2498 }
2499
2500 int
2501 xloadfont(Font *f, FcPattern *pattern) {
2502 FcPattern *match;
2503 FcResult result;
2504
2505 match = FcFontMatch(NULL, pattern, &result);
2506 if(!match)
2507 return 1;
2508
2509 if(!(f->set = FcFontSort(0, match, FcTrue, 0, &result))) {
2510 FcPatternDestroy(match);
2511 return 1;
2512 }
2513
2514 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2515 FcPatternDestroy(match);
2516 return 1;
2517 }
2518
2519 f->pattern = FcPatternDuplicate(pattern);
2520
2521 f->ascent = f->match->ascent;
2522 f->descent = f->match->descent;
2523 f->lbearing = 0;
2524 f->rbearing = f->match->max_advance_width;
2525
2526 f->height = f->ascent + f->descent;
2527 f->width = f->lbearing + f->rbearing;
2528
2529 return 0;
2530 }
2531
2532 void
2533 xloadfonts(char *fontstr, int fontsize) {
2534 FcPattern *pattern;
2535 FcResult result;
2536 double fontval;
2537
2538 if(fontstr[0] == '-') {
2539 pattern = XftXlfdParse(fontstr, False, False);
2540 } else {
2541 pattern = FcNameParse((FcChar8 *)fontstr);
2542 }
2543
2544 if(!pattern)
2545 die("st: can't open font %s\n", fontstr);
2546
2547 if(fontsize > 0) {
2548 FcPatternDel(pattern, FC_PIXEL_SIZE);
2549 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2550 usedfontsize = fontsize;
2551 } else {
2552 result = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2553 if(result == FcResultMatch) {
2554 usedfontsize = (int)fontval;
2555 } else {
2556 /*
2557 * Default font size is 12, if none given. This is to
2558 * have a known usedfontsize value.
2559 */
2560 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
2561 usedfontsize = 12;
2562 }
2563 }
2564
2565 FcConfigSubstitute(0, pattern, FcMatchPattern);
2566 FcDefaultSubstitute(pattern);
2567
2568 if(xloadfont(&dc.font, pattern))
2569 die("st: can't open font %s\n", fontstr);
2570
2571 /* Setting character width and height. */
2572 xw.cw = dc.font.width;
2573 xw.ch = dc.font.height;
2574
2575 FcPatternDel(pattern, FC_SLANT);
2576 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
2577 if(xloadfont(&dc.ifont, pattern))
2578 die("st: can't open font %s\n", fontstr);
2579
2580 FcPatternDel(pattern, FC_WEIGHT);
2581 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
2582 if(xloadfont(&dc.ibfont, pattern))
2583 die("st: can't open font %s\n", fontstr);
2584
2585 FcPatternDel(pattern, FC_SLANT);
2586 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
2587 if(xloadfont(&dc.bfont, pattern))
2588 die("st: can't open font %s\n", fontstr);
2589
2590 FcPatternDestroy(pattern);
2591 }
2592
2593 void
2594 xunloadfonts(void) {
2595 int i, ip;
2596
2597 /*
2598 * Free the loaded fonts in the font cache. This is done backwards
2599 * from the frccur.
2600 */
2601 for(i = 0, ip = frccur; i < frclen; i++, ip--) {
2602 if(ip < 0)
2603 ip = LEN(frc) - 1;
2604 XftFontClose(xw.dpy, frc[ip].font);
2605 }
2606 frccur = -1;
2607 frclen = 0;
2608
2609 XftFontClose(xw.dpy, dc.font.match);
2610 FcPatternDestroy(dc.font.pattern);
2611 FcFontSetDestroy(dc.font.set);
2612 XftFontClose(xw.dpy, dc.bfont.match);
2613 FcPatternDestroy(dc.bfont.pattern);
2614 FcFontSetDestroy(dc.bfont.set);
2615 XftFontClose(xw.dpy, dc.ifont.match);
2616 FcPatternDestroy(dc.ifont.pattern);
2617 FcFontSetDestroy(dc.ifont.set);
2618 XftFontClose(xw.dpy, dc.ibfont.match);
2619 FcPatternDestroy(dc.ibfont.pattern);
2620 FcFontSetDestroy(dc.ibfont.set);
2621 }
2622
2623 void
2624 xzoom(const Arg *arg) {
2625 xunloadfonts();
2626 xloadfonts(usedfont, usedfontsize + arg->i);
2627 cresize(0, 0);
2628 redraw(0);
2629 }
2630
2631 void
2632 xinit(void) {
2633 XSetWindowAttributes attrs;
2634 XGCValues gcvalues;
2635 Cursor cursor;
2636 Window parent;
2637 int sw, sh;
2638
2639 if(!(xw.dpy = XOpenDisplay(NULL)))
2640 die("Can't open display\n");
2641 xw.scr = XDefaultScreen(xw.dpy);
2642 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
2643
2644 /* font */
2645 if(!FcInit())
2646 die("Could not init fontconfig.\n");
2647
2648 usedfont = (opt_font == NULL)? font : opt_font;
2649 xloadfonts(usedfont, 0);
2650
2651 /* colors */
2652 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
2653 xloadcols();
2654
2655 /* adjust fixed window geometry */
2656 if(xw.isfixed) {
2657 sw = DisplayWidth(xw.dpy, xw.scr);
2658 sh = DisplayHeight(xw.dpy, xw.scr);
2659 if(xw.fx < 0)
2660 xw.fx = sw + xw.fx - xw.fw - 1;
2661 if(xw.fy < 0)
2662 xw.fy = sh + xw.fy - xw.fh - 1;
2663
2664 xw.h = xw.fh;
2665 xw.w = xw.fw;
2666 } else {
2667 /* window - default size */
2668 xw.h = 2 * borderpx + term.row * xw.ch;
2669 xw.w = 2 * borderpx + term.col * xw.cw;
2670 xw.fx = 0;
2671 xw.fy = 0;
2672 }
2673
2674 /* Events */
2675 attrs.background_pixel = dc.col[defaultbg].pixel;
2676 attrs.border_pixel = dc.col[defaultbg].pixel;
2677 attrs.bit_gravity = NorthWestGravity;
2678 attrs.event_mask = FocusChangeMask | KeyPressMask
2679 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
2680 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
2681 attrs.colormap = xw.cmap;
2682
2683 parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
2684 XRootWindow(xw.dpy, xw.scr);
2685 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
2686 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
2687 xw.vis,
2688 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
2689 | CWColormap,
2690 &attrs);
2691
2692 memset(&gcvalues, 0, sizeof(gcvalues));
2693 gcvalues.graphics_exposures = False;
2694 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
2695 &gcvalues);
2696 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2697 DefaultDepth(xw.dpy, xw.scr));
2698 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
2699 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
2700
2701 /* Xft rendering context */
2702 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
2703
2704 /* input methods */
2705 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2706 XSetLocaleModifiers("@im=local");
2707 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2708 XSetLocaleModifiers("@im=");
2709 if((xw.xim = XOpenIM(xw.dpy,
2710 NULL, NULL, NULL)) == NULL) {
2711 die("XOpenIM failed. Could not open input"
2712 " device.\n");
2713 }
2714 }
2715 }
2716 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
2717 | XIMStatusNothing, XNClientWindow, xw.win,
2718 XNFocusWindow, xw.win, NULL);
2719 if(xw.xic == NULL)
2720 die("XCreateIC failed. Could not obtain input method.\n");
2721
2722 /* white cursor, black outline */
2723 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
2724 XDefineCursor(xw.dpy, xw.win, cursor);
2725 XRecolorCursor(xw.dpy, cursor,
2726 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
2727 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
2728
2729 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
2730 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
2731 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
2732
2733 xresettitle();
2734 XMapWindow(xw.dpy, xw.win);
2735 xhints();
2736 XSync(xw.dpy, 0);
2737 }
2738
2739 void
2740 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
2741 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
2742 width = charlen * xw.cw, xp, i;
2743 int frp, frcflags;
2744 int u8fl, u8fblen, u8cblen, doesexist;
2745 char *u8c, *u8fs;
2746 long u8char;
2747 Font *font = &dc.font;
2748 FcResult fcres;
2749 FcPattern *fcpattern, *fontpattern;
2750 FcFontSet *fcsets[] = { NULL };
2751 FcCharSet *fccharset;
2752 Colour *fg, *bg, *temp, revfg, revbg;
2753 XRenderColor colfg, colbg;
2754
2755 frcflags = FRC_NORMAL;
2756
2757 if(base.mode & ATTR_ITALIC) {
2758 if(base.fg == defaultfg)
2759 base.fg = defaultitalic;
2760 font = &dc.ifont;
2761 frcflags = FRC_ITALIC;
2762 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
2763 if(base.fg == defaultfg)
2764 base.fg = defaultitalic;
2765 font = &dc.ibfont;
2766 frcflags = FRC_ITALICBOLD;
2767 } else if(base.mode & ATTR_UNDERLINE) {
2768 if(base.fg == defaultfg)
2769 base.fg = defaultunderline;
2770 }
2771 fg = &dc.col[base.fg];
2772 bg = &dc.col[base.bg];
2773
2774 if(base.mode & ATTR_BOLD) {
2775 if(BETWEEN(base.fg, 0, 7)) {
2776 /* basic system colors */
2777 fg = &dc.col[base.fg + 8];
2778 } else if(BETWEEN(base.fg, 16, 195)) {
2779 /* 256 colors */
2780 fg = &dc.col[base.fg + 36];
2781 } else if(BETWEEN(base.fg, 232, 251)) {
2782 /* greyscale */
2783 fg = &dc.col[base.fg + 4];
2784 }
2785 /*
2786 * Those ranges will not be brightened:
2787 * 8 - 15 – bright system colors
2788 * 196 - 231 – highest 256 color cube
2789 * 252 - 255 – brightest colors in greyscale
2790 */
2791 font = &dc.bfont;
2792 frcflags = FRC_BOLD;
2793 }
2794
2795 if(IS_SET(MODE_REVERSE)) {
2796 if(fg == &dc.col[defaultfg]) {
2797 fg = &dc.col[defaultbg];
2798 } else {
2799 colfg.red = ~fg->color.red;
2800 colfg.green = ~fg->color.green;
2801 colfg.blue = ~fg->color.blue;
2802 colfg.alpha = fg->color.alpha;
2803 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
2804 fg = &revfg;
2805 }
2806
2807 if(bg == &dc.col[defaultbg]) {
2808 bg = &dc.col[defaultfg];
2809 } else {
2810 colbg.red = ~bg->color.red;
2811 colbg.green = ~bg->color.green;
2812 colbg.blue = ~bg->color.blue;
2813 colbg.alpha = bg->color.alpha;
2814 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &revbg);
2815 bg = &revbg;
2816 }
2817 }
2818
2819 if(base.mode & ATTR_REVERSE) {
2820 temp = fg;
2821 fg = bg;
2822 bg = temp;
2823 }
2824
2825 /* Intelligent cleaning up of the borders. */
2826 if(x == 0) {
2827 xclear(0, (y == 0)? 0 : winy, borderpx,
2828 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
2829 }
2830 if(x + charlen >= term.col) {
2831 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
2832 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
2833 }
2834 if(y == 0)
2835 xclear(winx, 0, winx + width, borderpx);
2836 if(y == term.row-1)
2837 xclear(winx, winy + xw.ch, winx + width, xw.h);
2838
2839 /* Clean up the region we want to draw to. */
2840 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
2841
2842 fcsets[0] = font->set;
2843 for(xp = winx; bytelen > 0;) {
2844 /*
2845 * Search for the range in the to be printed string of glyphs
2846 * that are in the main font. Then print that range. If
2847 * some glyph is found that is not in the font, do the
2848 * fallback dance.
2849 */
2850 u8fs = s;
2851 u8fblen = 0;
2852 u8fl = 0;
2853 for(;;) {
2854 u8c = s;
2855 u8cblen = utf8decode(s, &u8char);
2856 s += u8cblen;
2857 bytelen -= u8cblen;
2858
2859 doesexist = XftCharIndex(xw.dpy, font->match, u8char);
2860 if(!doesexist || bytelen <= 0) {
2861 if(bytelen <= 0) {
2862 if(doesexist) {
2863 u8fl++;
2864 u8fblen += u8cblen;
2865 }
2866 }
2867
2868 if(u8fl > 0) {
2869 XftDrawStringUtf8(xw.draw, fg,
2870 font->match, xp,
2871 winy + font->ascent,
2872 (FcChar8 *)u8fs,
2873 u8fblen);
2874 xp += font->width * u8fl;
2875 }
2876 break;
2877 }
2878
2879 u8fl++;
2880 u8fblen += u8cblen;
2881 }
2882 if(doesexist)
2883 break;
2884
2885 frp = frccur;
2886 /* Search the font cache. */
2887 for(i = 0; i < frclen; i++, frp--) {
2888 if(frp <= 0)
2889 frp = LEN(frc) - 1;
2890
2891 if(frc[frp].c == u8char
2892 && frc[frp].flags == frcflags) {
2893 break;
2894 }
2895 }
2896
2897 /* Nothing was found. */
2898 if(i >= frclen) {
2899 /*
2900 * Nothing was found in the cache. Now use
2901 * some dozen of Fontconfig calls to get the
2902 * font for one single character.
2903 */
2904 fcpattern = FcPatternDuplicate(font->pattern);
2905 fccharset = FcCharSetCreate();
2906
2907 FcCharSetAddChar(fccharset, u8char);
2908 FcPatternAddCharSet(fcpattern, FC_CHARSET,
2909 fccharset);
2910 FcPatternAddBool(fcpattern, FC_SCALABLE,
2911 FcTrue);
2912
2913 FcConfigSubstitute(0, fcpattern,
2914 FcMatchPattern);
2915 FcDefaultSubstitute(fcpattern);
2916
2917 fontpattern = FcFontSetMatch(0, fcsets,
2918 FcTrue, fcpattern, &fcres);
2919
2920 /*
2921 * Overwrite or create the new cache entry.
2922 */
2923 frccur++;
2924 frclen++;
2925 if(frccur >= LEN(frc))
2926 frccur = 0;
2927 if(frclen > LEN(frc)) {
2928 frclen = LEN(frc);
2929 XftFontClose(xw.dpy, frc[frccur].font);
2930 }
2931
2932 frc[frccur].font = XftFontOpenPattern(xw.dpy,
2933 fontpattern);
2934 frc[frccur].c = u8char;
2935 frc[frccur].flags = frcflags;
2936
2937 FcPatternDestroy(fcpattern);
2938 FcCharSetDestroy(fccharset);
2939
2940 frp = frccur;
2941 }
2942
2943 XftDrawStringUtf8(xw.draw, fg, frc[frp].font,
2944 xp, winy + frc[frp].font->ascent,
2945 (FcChar8 *)u8c, u8cblen);
2946
2947 xp += font->width;
2948 }
2949
2950 /*
2951 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
2952 winy + font->ascent, (FcChar8 *)s, bytelen);
2953 */
2954
2955 if(base.mode & ATTR_UNDERLINE) {
2956 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
2957 width, 1);
2958 }
2959 }
2960
2961 void
2962 xdrawcursor(void) {
2963 static int oldx = 0, oldy = 0;
2964 int sl;
2965 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
2966
2967 LIMIT(oldx, 0, term.col-1);
2968 LIMIT(oldy, 0, term.row-1);
2969
2970 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
2971
2972 /* remove the old cursor */
2973 sl = utf8size(term.line[oldy][oldx].c);
2974 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
2975 oldy, 1, sl);
2976
2977 /* draw the new one */
2978 if(!(IS_SET(MODE_HIDE))) {
2979 if(xw.state & WIN_FOCUSED) {
2980 if(IS_SET(MODE_REVERSE)) {
2981 g.mode |= ATTR_REVERSE;
2982 g.fg = defaultcs;
2983 g.bg = defaultfg;
2984 }
2985
2986 sl = utf8size(g.c);
2987 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
2988 } else {
2989 XftDrawRect(xw.draw, &dc.col[defaultcs],
2990 borderpx + term.c.x * xw.cw,
2991 borderpx + term.c.y * xw.ch,
2992 xw.cw - 1, 1);
2993 XftDrawRect(xw.draw, &dc.col[defaultcs],
2994 borderpx + term.c.x * xw.cw,
2995 borderpx + term.c.y * xw.ch,
2996 1, xw.ch - 1);
2997 XftDrawRect(xw.draw, &dc.col[defaultcs],
2998 borderpx + (term.c.x + 1) * xw.cw - 1,
2999 borderpx + term.c.y * xw.ch,
3000 1, xw.ch - 1);
3001 XftDrawRect(xw.draw, &dc.col[defaultcs],
3002 borderpx + term.c.x * xw.cw,
3003 borderpx + (term.c.y + 1) * xw.ch - 1,
3004 xw.cw, 1);
3005 }
3006 oldx = term.c.x, oldy = term.c.y;
3007 }
3008 }
3009
3010
3011 void
3012 xsettitle(char *p) {
3013 XTextProperty prop;
3014
3015 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3016 &prop);
3017 XSetWMName(xw.dpy, xw.win, &prop);
3018 }
3019
3020 void
3021 xresettitle(void) {
3022 xsettitle(opt_title ? opt_title : "st");
3023 }
3024
3025 void
3026 redraw(int timeout) {
3027 struct timespec tv = {0, timeout * 1000};
3028
3029 tfulldirt();
3030 draw();
3031
3032 if(timeout > 0) {
3033 nanosleep(&tv, NULL);
3034 XSync(xw.dpy, False); /* necessary for a good tput flash */
3035 }
3036 }
3037
3038 void
3039 draw(void) {
3040 drawregion(0, 0, term.col, term.row);
3041 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3042 xw.h, 0, 0);
3043 XSetForeground(xw.dpy, dc.gc,
3044 dc.col[IS_SET(MODE_REVERSE)?
3045 defaultfg : defaultbg].pixel);
3046 }
3047
3048 void
3049 drawregion(int x1, int y1, int x2, int y2) {
3050 int ic, ib, x, y, ox, sl;
3051 Glyph base, new;
3052 char buf[DRAW_BUF_SIZ];
3053 bool ena_sel = sel.bx != -1;
3054
3055 if(sel.alt ^ IS_SET(MODE_ALTSCREEN))
3056 ena_sel = 0;
3057
3058 if(!(xw.state & WIN_VISIBLE))
3059 return;
3060
3061 for(y = y1; y < y2; y++) {
3062 if(!term.dirty[y])
3063 continue;
3064
3065 xtermclear(0, y, term.col, y);
3066 term.dirty[y] = 0;
3067 base = term.line[y][0];
3068 ic = ib = ox = 0;
3069 for(x = x1; x < x2; x++) {
3070 new = term.line[y][x];
3071 if(ena_sel && *(new.c) && selected(x, y))
3072 new.mode ^= ATTR_REVERSE;
3073 if(ib > 0 && (ATTRCMP(base, new)
3074 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3075 xdraws(buf, base, ox, y, ic, ib);
3076 ic = ib = 0;
3077 }
3078 if(ib == 0) {
3079 ox = x;
3080 base = new;
3081 }
3082
3083 sl = utf8size(new.c);
3084 memcpy(buf+ib, new.c, sl);
3085 ib += sl;
3086 ++ic;
3087 }
3088 if(ib > 0)
3089 xdraws(buf, base, ox, y, ic, ib);
3090 }
3091 xdrawcursor();
3092 }
3093
3094 void
3095 expose(XEvent *ev) {
3096 XExposeEvent *e = &ev->xexpose;
3097
3098 if(xw.state & WIN_REDRAW) {
3099 if(!e->count)
3100 xw.state &= ~WIN_REDRAW;
3101 }
3102 redraw(0);
3103 }
3104
3105 void
3106 visibility(XEvent *ev) {
3107 XVisibilityEvent *e = &ev->xvisibility;
3108
3109 if(e->state == VisibilityFullyObscured) {
3110 xw.state &= ~WIN_VISIBLE;
3111 } else if(!(xw.state & WIN_VISIBLE)) {
3112 /* need a full redraw for next Expose, not just a buf copy */
3113 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3114 }
3115 }
3116
3117 void
3118 unmap(XEvent *ev) {
3119 xw.state &= ~WIN_VISIBLE;
3120 }
3121
3122 void
3123 xseturgency(int add) {
3124 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3125
3126 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
3127 XSetWMHints(xw.dpy, xw.win, h);
3128 XFree(h);
3129 }
3130
3131 void
3132 focus(XEvent *ev) {
3133 XFocusChangeEvent *e = &ev->xfocus;
3134
3135 if(e->mode == NotifyGrab)
3136 return;
3137
3138 if(ev->type == FocusIn) {
3139 XSetICFocus(xw.xic);
3140 xw.state |= WIN_FOCUSED;
3141 xseturgency(0);
3142 } else {
3143 XUnsetICFocus(xw.xic);
3144 xw.state &= ~WIN_FOCUSED;
3145 }
3146 }
3147
3148 inline bool
3149 match(uint mask, uint state) {
3150 state &= ~(ignoremod);
3151
3152 if(mask == XK_NO_MOD && state)
3153 return false;
3154 if(mask != XK_ANY_MOD && mask != XK_NO_MOD && !state)
3155 return false;
3156 if((state & mask) != state)
3157 return false;
3158 return true;
3159 }
3160
3161 void
3162 numlock(const Arg *dummy) {
3163 term.numlock ^= 1;
3164 }
3165
3166 char*
3167 kmap(KeySym k, uint state) {
3168 uint mask;
3169 Key *kp;
3170 int i;
3171
3172 /* Check for mapped keys out of X11 function keys. */
3173 for(i = 0; i < LEN(mappedkeys); i++) {
3174 if(mappedkeys[i] == k)
3175 break;
3176 }
3177 if(i == LEN(mappedkeys)) {
3178 if((k & 0xFFFF) < 0xFD00)
3179 return NULL;
3180 }
3181
3182 for(kp = key; kp < key + LEN(key); kp++) {
3183 mask = kp->mask;
3184
3185 if(kp->k != k)
3186 continue;
3187
3188 if(!match(mask, state))
3189 continue;
3190
3191 if(kp->appkey > 0) {
3192 if(!IS_SET(MODE_APPKEYPAD))
3193 continue;
3194 if(term.numlock && kp->appkey == 2)
3195 continue;
3196 } else if(kp->appkey < 0 && IS_SET(MODE_APPKEYPAD)) {
3197 continue;
3198 }
3199
3200 if((kp->appcursor < 0 && IS_SET(MODE_APPCURSOR)) ||
3201 (kp->appcursor > 0
3202 && !IS_SET(MODE_APPCURSOR))) {
3203 continue;
3204 }
3205
3206 if((kp->crlf < 0 && IS_SET(MODE_CRLF)) ||
3207 (kp->crlf > 0 && !IS_SET(MODE_CRLF))) {
3208 continue;
3209 }
3210
3211 return kp->s;
3212 }
3213
3214 return NULL;
3215 }
3216
3217 void
3218 kpress(XEvent *ev) {
3219 XKeyEvent *e = &ev->xkey;
3220 KeySym ksym;
3221 char xstr[31], buf[32], *customkey, *cp = buf;
3222 int len;
3223 Status status;
3224 Shortcut *bp;
3225
3226 if(IS_SET(MODE_KBDLOCK))
3227 return;
3228
3229 len = XmbLookupString(xw.xic, e, xstr, sizeof(xstr), &ksym, &status);
3230 e->state &= ~Mod2Mask;
3231 /* 1. shortcuts */
3232 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3233 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3234 bp->func(&(bp->arg));
3235 return;
3236 }
3237 }
3238
3239 /* 2. custom keys from config.h */
3240 if((customkey = kmap(ksym, e->state))) {
3241 len = strlen(customkey);
3242 memcpy(buf, customkey, len);
3243 /* 2. hardcoded (overrides X lookup) */
3244 } else {
3245 if(len == 0)
3246 return;
3247
3248 if(len == 1 && e->state & Mod1Mask)
3249 *cp++ = '\033';
3250
3251 memcpy(cp, xstr, len);
3252 len = cp - buf + len;
3253 }
3254
3255 ttywrite(buf, len);
3256 if(IS_SET(MODE_ECHO))
3257 techo(buf, len);
3258 }
3259
3260
3261 void
3262 cmessage(XEvent *e) {
3263 /*
3264 * See xembed specs
3265 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3266 */
3267 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3268 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3269 xw.state |= WIN_FOCUSED;
3270 xseturgency(0);
3271 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3272 xw.state &= ~WIN_FOCUSED;
3273 }
3274 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3275 /* Send SIGHUP to shell */
3276 kill(pid, SIGHUP);
3277 exit(EXIT_SUCCESS);
3278 }
3279 }
3280
3281 void
3282 cresize(int width, int height) {
3283 int col, row;
3284
3285 if(width != 0)
3286 xw.w = width;
3287 if(height != 0)
3288 xw.h = height;
3289
3290 col = (xw.w - 2 * borderpx) / xw.cw;
3291 row = (xw.h - 2 * borderpx) / xw.ch;
3292
3293 tresize(col, row);
3294 xresize(col, row);
3295 ttyresize();
3296 }
3297
3298 void
3299 resize(XEvent *e) {
3300 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3301 return;
3302
3303 cresize(e->xconfigure.width, e->xconfigure.height);
3304 }
3305
3306 void
3307 run(void) {
3308 XEvent ev;
3309 fd_set rfd;
3310 int xfd = XConnectionNumber(xw.dpy), xev;
3311 struct timeval drawtimeout, *tv = NULL, now, last;
3312
3313 gettimeofday(&last, NULL);
3314
3315 for(xev = actionfps;;) {
3316 FD_ZERO(&rfd);
3317 FD_SET(cmdfd, &rfd);
3318 FD_SET(xfd, &rfd);
3319 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
3320 if(errno == EINTR)
3321 continue;
3322 die("select failed: %s\n", SERRNO);
3323 }
3324
3325 gettimeofday(&now, NULL);
3326 drawtimeout.tv_sec = 0;
3327 drawtimeout.tv_usec = (1000/xfps) * 1000;
3328 tv = &drawtimeout;
3329
3330 if(FD_ISSET(cmdfd, &rfd))
3331 ttyread();
3332
3333 if(FD_ISSET(xfd, &rfd))
3334 xev = actionfps;
3335
3336 if(TIMEDIFF(now, last) > \
3337 (xev ? (1000/xfps) : (1000/actionfps))) {
3338 while(XPending(xw.dpy)) {
3339 XNextEvent(xw.dpy, &ev);
3340 if(XFilterEvent(&ev, None))
3341 continue;
3342 if(handler[ev.type])
3343 (handler[ev.type])(&ev);
3344 }
3345
3346 draw();
3347 XFlush(xw.dpy);
3348 last = now;
3349
3350 if(xev && !FD_ISSET(xfd, &rfd))
3351 xev--;
3352 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd))
3353 tv = NULL;
3354 }
3355 }
3356 }
3357
3358 void
3359 usage(void) {
3360 die("%s " VERSION " (c) 2010-2013 st engineers\n" \
3361 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]" \
3362 " [-t title] [-w windowid] [-e command ...]\n", argv0);
3363 }
3364
3365 int
3366 main(int argc, char *argv[]) {
3367 int bitm, xr, yr;
3368 uint wr, hr;
3369
3370 xw.fw = xw.fh = xw.fx = xw.fy = 0;
3371 xw.isfixed = False;
3372
3373 ARGBEGIN {
3374 case 'a':
3375 allowaltscreen = false;
3376 break;
3377 case 'c':
3378 opt_class = EARGF(usage());
3379 break;
3380 case 'e':
3381 /* eat all remaining arguments */
3382 if(argc > 1)
3383 opt_cmd = &argv[1];
3384 goto run;
3385 case 'f':
3386 opt_font = EARGF(usage());
3387 break;
3388 case 'g':
3389 bitm = XParseGeometry(EARGF(usage()), &xr, &yr, &wr, &hr);
3390 if(bitm & XValue)
3391 xw.fx = xr;
3392 if(bitm & YValue)
3393 xw.fy = yr;
3394 if(bitm & WidthValue)
3395 xw.fw = (int)wr;
3396 if(bitm & HeightValue)
3397 xw.fh = (int)hr;
3398 if(bitm & XNegative && xw.fx == 0)
3399 xw.fx = -1;
3400 if(bitm & XNegative && xw.fy == 0)
3401 xw.fy = -1;
3402
3403 if(xw.fh != 0 && xw.fw != 0)
3404 xw.isfixed = True;
3405 break;
3406 case 'o':
3407 opt_io = EARGF(usage());
3408 break;
3409 case 't':
3410 opt_title = EARGF(usage());
3411 break;
3412 case 'w':
3413 opt_embed = EARGF(usage());
3414 break;
3415 case 'v':
3416 default:
3417 usage();
3418 } ARGEND;
3419
3420 run:
3421 setlocale(LC_CTYPE, "");
3422 XSetLocaleModifiers("");
3423 tnew(80, 24);
3424 xinit();
3425 ttynew();
3426 selinit();
3427 if(xw.isfixed)
3428 cresize(xw.h, xw.w);
3429 run();
3430
3431 return 0;
3432 }
3433