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Selection now handles empty lines less counter-intuitively.
[st.git] / st.c
1 /* See LICENSE for licence details. */
2 #include <ctype.h>
3 #include <errno.h>
4 #include <fcntl.h>
5 #include <limits.h>
6 #include <locale.h>
7 #include <pwd.h>
8 #include <stdarg.h>
9 #include <stdbool.h>
10 #include <stdio.h>
11 #include <stdlib.h>
12 #include <string.h>
13 #include <signal.h>
14 #include <sys/ioctl.h>
15 #include <sys/select.h>
16 #include <sys/stat.h>
17 #include <sys/time.h>
18 #include <sys/types.h>
19 #include <sys/wait.h>
20 #include <time.h>
21 #include <unistd.h>
22 #include <X11/Xatom.h>
23 #include <X11/Xlib.h>
24 #include <X11/Xutil.h>
25 #include <X11/cursorfont.h>
26 #include <X11/keysym.h>
27 #include <X11/Xft/Xft.h>
28 #include <fontconfig/fontconfig.h>
29
30 #include "arg.h"
31
32 char *argv0;
33
34 #define Glyph Glyph_
35 #define Font Font_
36 #define Draw XftDraw *
37 #define Colour XftColor
38 #define Colourmap Colormap
39
40 #if defined(__linux)
41 #include <pty.h>
42 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
43 #include <util.h>
44 #elif defined(__FreeBSD__) || defined(__DragonFly__)
45 #include <libutil.h>
46 #endif
47
48
49 /* XEMBED messages */
50 #define XEMBED_FOCUS_IN 4
51 #define XEMBED_FOCUS_OUT 5
52
53 /* Arbitrary sizes */
54 #define UTF_SIZ 4
55 #define ESC_BUF_SIZ (128*UTF_SIZ)
56 #define ESC_ARG_SIZ 16
57 #define STR_BUF_SIZ ESC_BUF_SIZ
58 #define STR_ARG_SIZ ESC_ARG_SIZ
59 #define DRAW_BUF_SIZ 20*1024
60 #define XK_ANY_MOD UINT_MAX
61 #define XK_NO_MOD 0
62 #define XK_SWITCH_MOD (1<<13)
63
64 #define REDRAW_TIMEOUT (80*1000) /* 80 ms */
65
66 /* macros */
67 #define SERRNO strerror(errno)
68 #define MIN(a, b) ((a) < (b) ? (a) : (b))
69 #define MAX(a, b) ((a) < (b) ? (b) : (a))
70 #define LEN(a) (sizeof(a) / sizeof(a[0]))
71 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
72 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
73 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
74 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
75 #define IS_SET(flag) ((term.mode & (flag)) != 0)
76 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_usec-t2.tv_usec)/1000)
77
78 #define VT102ID "\033[?6c"
79
80 enum glyph_attribute {
81 ATTR_NULL = 0,
82 ATTR_REVERSE = 1,
83 ATTR_UNDERLINE = 2,
84 ATTR_BOLD = 4,
85 ATTR_GFX = 8,
86 ATTR_ITALIC = 16,
87 ATTR_BLINK = 32,
88 };
89
90 enum cursor_movement {
91 CURSOR_SAVE,
92 CURSOR_LOAD
93 };
94
95 enum cursor_state {
96 CURSOR_DEFAULT = 0,
97 CURSOR_WRAPNEXT = 1,
98 CURSOR_ORIGIN = 2
99 };
100
101 enum term_mode {
102 MODE_WRAP = 1,
103 MODE_INSERT = 2,
104 MODE_APPKEYPAD = 4,
105 MODE_ALTSCREEN = 8,
106 MODE_CRLF = 16,
107 MODE_MOUSEBTN = 32,
108 MODE_MOUSEMOTION = 64,
109 MODE_MOUSE = 32|64,
110 MODE_REVERSE = 128,
111 MODE_KBDLOCK = 256,
112 MODE_HIDE = 512,
113 MODE_ECHO = 1024,
114 MODE_APPCURSOR = 2048,
115 MODE_MOUSESGR = 4096,
116 };
117
118 enum escape_state {
119 ESC_START = 1,
120 ESC_CSI = 2,
121 ESC_STR = 4, /* DSC, OSC, PM, APC */
122 ESC_ALTCHARSET = 8,
123 ESC_STR_END = 16, /* a final string was encountered */
124 ESC_TEST = 32, /* Enter in test mode */
125 };
126
127 enum window_state {
128 WIN_VISIBLE = 1,
129 WIN_REDRAW = 2,
130 WIN_FOCUSED = 4
131 };
132
133 enum selection_type {
134 SEL_REGULAR = 1,
135 SEL_RECTANGULAR = 2
136 };
137
138 /* bit macro */
139 #undef B0
140 enum { B0=1, B1=2, B2=4, B3=8, B4=16, B5=32, B6=64, B7=128 };
141
142 typedef unsigned char uchar;
143 typedef unsigned int uint;
144 typedef unsigned long ulong;
145 typedef unsigned short ushort;
146
147 typedef struct {
148 char c[UTF_SIZ]; /* character code */
149 uchar mode; /* attribute flags */
150 ushort fg; /* foreground */
151 ushort bg; /* background */
152 } Glyph;
153
154 typedef Glyph *Line;
155
156 typedef struct {
157 Glyph attr; /* current char attributes */
158 int x;
159 int y;
160 char state;
161 } TCursor;
162
163 /* CSI Escape sequence structs */
164 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
165 typedef struct {
166 char buf[ESC_BUF_SIZ]; /* raw string */
167 int len; /* raw string length */
168 char priv;
169 int arg[ESC_ARG_SIZ];
170 int narg; /* nb of args */
171 char mode;
172 } CSIEscape;
173
174 /* STR Escape sequence structs */
175 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
176 typedef struct {
177 char type; /* ESC type ... */
178 char buf[STR_BUF_SIZ]; /* raw string */
179 int len; /* raw string length */
180 char *args[STR_ARG_SIZ];
181 int narg; /* nb of args */
182 } STREscape;
183
184 /* Internal representation of the screen */
185 typedef struct {
186 int row; /* nb row */
187 int col; /* nb col */
188 Line *line; /* screen */
189 Line *alt; /* alternate screen */
190 bool *dirty; /* dirtyness of lines */
191 TCursor c; /* cursor */
192 int top; /* top scroll limit */
193 int bot; /* bottom scroll limit */
194 int mode; /* terminal mode flags */
195 int esc; /* escape state flags */
196 bool numlock; /* lock numbers in keyboard */
197 bool *tabs;
198 } Term;
199
200 /* Purely graphic info */
201 typedef struct {
202 Display *dpy;
203 Colourmap cmap;
204 Window win;
205 Drawable buf;
206 Atom xembed, wmdeletewin;
207 XIM xim;
208 XIC xic;
209 Draw draw;
210 Visual *vis;
211 int scr;
212 bool isfixed; /* is fixed geometry? */
213 int fx, fy, fw, fh; /* fixed geometry */
214 int tw, th; /* tty width and height */
215 int w, h; /* window width and height */
216 int ch; /* char height */
217 int cw; /* char width */
218 char state; /* focus, redraw, visible */
219 } XWindow;
220
221 typedef struct {
222 KeySym k;
223 uint mask;
224 char s[ESC_BUF_SIZ];
225 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
226 signed char appkey; /* application keypad */
227 signed char appcursor; /* application cursor */
228 signed char crlf; /* crlf mode */
229 } Key;
230
231 /* TODO: use better name for vars... */
232 typedef struct {
233 int mode;
234 int type;
235 int bx, by;
236 int ex, ey;
237 struct {
238 int x, y;
239 } b, e;
240 char *clip;
241 Atom xtarget;
242 bool alt;
243 struct timeval tclick1;
244 struct timeval tclick2;
245 } Selection;
246
247 typedef union {
248 int i;
249 unsigned int ui;
250 float f;
251 const void *v;
252 } Arg;
253
254 typedef struct {
255 unsigned int mod;
256 KeySym keysym;
257 void (*func)(const Arg *);
258 const Arg arg;
259 } Shortcut;
260
261 /* function definitions used in config.h */
262 static void clippaste(const Arg *);
263 static void numlock(const Arg *);
264 static void selpaste(const Arg *);
265 static void xzoom(const Arg *);
266
267 /* Config.h for applying patches and the configuration. */
268 #include "config.h"
269
270 /* Font structure */
271 typedef struct {
272 int height;
273 int width;
274 int ascent;
275 int descent;
276 short lbearing;
277 short rbearing;
278 XftFont *match;
279 FcFontSet *set;
280 FcPattern *pattern;
281 } Font;
282
283 /* Drawing Context */
284 typedef struct {
285 Colour col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
286 Font font, bfont, ifont, ibfont;
287 GC gc;
288 } DC;
289
290 static void die(const char *, ...);
291 static void draw(void);
292 static void redraw(int);
293 static void drawregion(int, int, int, int);
294 static void execsh(void);
295 static void sigchld(int);
296 static void run(void);
297
298 static void csidump(void);
299 static void csihandle(void);
300 static void csiparse(void);
301 static void csireset(void);
302 static void strdump(void);
303 static void strhandle(void);
304 static void strparse(void);
305 static void strreset(void);
306
307 static void tclearregion(int, int, int, int);
308 static void tcursor(int);
309 static void tdeletechar(int);
310 static void tdeleteline(int);
311 static void tinsertblank(int);
312 static void tinsertblankline(int);
313 static void tmoveto(int, int);
314 static void tmoveato(int x, int y);
315 static void tnew(int, int);
316 static void tnewline(int);
317 static void tputtab(bool);
318 static void tputc(char *, int);
319 static void treset(void);
320 static int tresize(int, int);
321 static void tscrollup(int, int);
322 static void tscrolldown(int, int);
323 static void tsetattr(int*, int);
324 static void tsetchar(char *, Glyph *, int, int);
325 static void tsetscroll(int, int);
326 static void tswapscreen(void);
327 static void tsetdirt(int, int);
328 static void tsetmode(bool, bool, int *, int);
329 static void tfulldirt(void);
330 static void techo(char *, int);
331
332 static inline bool match(uint, uint);
333 static void ttynew(void);
334 static void ttyread(void);
335 static void ttyresize(void);
336 static void ttywrite(const char *, size_t);
337
338 static void xdraws(char *, Glyph, int, int, int, int);
339 static void xhints(void);
340 static void xclear(int, int, int, int);
341 static void xdrawcursor(void);
342 static void xinit(void);
343 static void xloadcols(void);
344 static int xsetcolorname(int, const char *);
345 static int xloadfont(Font *, FcPattern *);
346 static void xloadfonts(char *, int);
347 static void xsettitle(char *);
348 static void xresettitle(void);
349 static void xseturgency(int);
350 static void xsetsel(char*);
351 static void xtermclear(int, int, int, int);
352 static void xunloadfonts(void);
353 static void xresize(int, int);
354
355 static void expose(XEvent *);
356 static void visibility(XEvent *);
357 static void unmap(XEvent *);
358 static char *kmap(KeySym, uint);
359 static void kpress(XEvent *);
360 static void cmessage(XEvent *);
361 static void cresize(int, int);
362 static void resize(XEvent *);
363 static void focus(XEvent *);
364 static void brelease(XEvent *);
365 static void bpress(XEvent *);
366 static void bmotion(XEvent *);
367 static void selnotify(XEvent *);
368 static void selclear(XEvent *);
369 static void selrequest(XEvent *);
370
371 static void selinit(void);
372 static inline bool selected(int, int);
373 static void selcopy(void);
374 static void selscroll(int, int);
375
376 static int utf8decode(char *, long *);
377 static int utf8encode(long *, char *);
378 static int utf8size(char *);
379 static int isfullutf8(char *, int);
380
381 static ssize_t xwrite(int, char *, size_t);
382 static void *xmalloc(size_t);
383 static void *xrealloc(void *, size_t);
384 static void *xcalloc(size_t, size_t);
385
386 static void (*handler[LASTEvent])(XEvent *) = {
387 [KeyPress] = kpress,
388 [ClientMessage] = cmessage,
389 [ConfigureNotify] = resize,
390 [VisibilityNotify] = visibility,
391 [UnmapNotify] = unmap,
392 [Expose] = expose,
393 [FocusIn] = focus,
394 [FocusOut] = focus,
395 [MotionNotify] = bmotion,
396 [ButtonPress] = bpress,
397 [ButtonRelease] = brelease,
398 [SelectionClear] = selclear,
399 [SelectionNotify] = selnotify,
400 [SelectionRequest] = selrequest,
401 };
402
403 /* Globals */
404 static DC dc;
405 static XWindow xw;
406 static Term term;
407 static CSIEscape csiescseq;
408 static STREscape strescseq;
409 static int cmdfd;
410 static pid_t pid;
411 static Selection sel;
412 static int iofd = -1;
413 static char **opt_cmd = NULL;
414 static char *opt_io = NULL;
415 static char *opt_title = NULL;
416 static char *opt_embed = NULL;
417 static char *opt_class = NULL;
418 static char *opt_font = NULL;
419
420 static char *usedfont = NULL;
421 static int usedfontsize = 0;
422
423 /* Font Ring Cache */
424 enum {
425 FRC_NORMAL,
426 FRC_ITALIC,
427 FRC_BOLD,
428 FRC_ITALICBOLD
429 };
430
431 typedef struct {
432 XftFont *font;
433 long c;
434 int flags;
435 } Fontcache;
436
437 /*
438 * Fontcache is a ring buffer, with frccur as current position and frclen as
439 * the current length of used elements.
440 */
441
442 static Fontcache frc[1024];
443 static int frccur = -1, frclen = 0;
444
445 ssize_t
446 xwrite(int fd, char *s, size_t len) {
447 size_t aux = len;
448
449 while(len > 0) {
450 ssize_t r = write(fd, s, len);
451 if(r < 0)
452 return r;
453 len -= r;
454 s += r;
455 }
456 return aux;
457 }
458
459 void *
460 xmalloc(size_t len) {
461 void *p = malloc(len);
462
463 if(!p)
464 die("Out of memory\n");
465
466 return p;
467 }
468
469 void *
470 xrealloc(void *p, size_t len) {
471 if((p = realloc(p, len)) == NULL)
472 die("Out of memory\n");
473
474 return p;
475 }
476
477 void *
478 xcalloc(size_t nmemb, size_t size) {
479 void *p = calloc(nmemb, size);
480
481 if(!p)
482 die("Out of memory\n");
483
484 return p;
485 }
486
487 int
488 utf8decode(char *s, long *u) {
489 uchar c;
490 int i, n, rtn;
491
492 rtn = 1;
493 c = *s;
494 if(~c & B7) { /* 0xxxxxxx */
495 *u = c;
496 return rtn;
497 } else if((c & (B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */
498 *u = c&(B4|B3|B2|B1|B0);
499 n = 1;
500 } else if((c & (B7|B6|B5|B4)) == (B7|B6|B5)) { /* 1110xxxx */
501 *u = c&(B3|B2|B1|B0);
502 n = 2;
503 } else if((c & (B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) { /* 11110xxx */
504 *u = c & (B2|B1|B0);
505 n = 3;
506 } else {
507 goto invalid;
508 }
509
510 for(i = n, ++s; i > 0; --i, ++rtn, ++s) {
511 c = *s;
512 if((c & (B7|B6)) != B7) /* 10xxxxxx */
513 goto invalid;
514 *u <<= 6;
515 *u |= c & (B5|B4|B3|B2|B1|B0);
516 }
517
518 if((n == 1 && *u < 0x80) ||
519 (n == 2 && *u < 0x800) ||
520 (n == 3 && *u < 0x10000) ||
521 (*u >= 0xD800 && *u <= 0xDFFF)) {
522 goto invalid;
523 }
524
525 return rtn;
526 invalid:
527 *u = 0xFFFD;
528
529 return rtn;
530 }
531
532 int
533 utf8encode(long *u, char *s) {
534 uchar *sp;
535 ulong uc;
536 int i, n;
537
538 sp = (uchar *)s;
539 uc = *u;
540 if(uc < 0x80) {
541 *sp = uc; /* 0xxxxxxx */
542 return 1;
543 } else if(*u < 0x800) {
544 *sp = (uc >> 6) | (B7|B6); /* 110xxxxx */
545 n = 1;
546 } else if(uc < 0x10000) {
547 *sp = (uc >> 12) | (B7|B6|B5); /* 1110xxxx */
548 n = 2;
549 } else if(uc <= 0x10FFFF) {
550 *sp = (uc >> 18) | (B7|B6|B5|B4); /* 11110xxx */
551 n = 3;
552 } else {
553 goto invalid;
554 }
555
556 for(i=n,++sp; i>0; --i,++sp)
557 *sp = ((uc >> 6*(i-1)) & (B5|B4|B3|B2|B1|B0)) | B7; /* 10xxxxxx */
558
559 return n+1;
560 invalid:
561 /* U+FFFD */
562 *s++ = '\xEF';
563 *s++ = '\xBF';
564 *s = '\xBD';
565
566 return 3;
567 }
568
569 /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
570 UTF-8 otherwise return 0 */
571 int
572 isfullutf8(char *s, int b) {
573 uchar *c1, *c2, *c3;
574
575 c1 = (uchar *)s;
576 c2 = (uchar *)++s;
577 c3 = (uchar *)++s;
578 if(b < 1) {
579 return 0;
580 } else if((*c1&(B7|B6|B5)) == (B7|B6) && b == 1) {
581 return 0;
582 } else if((*c1&(B7|B6|B5|B4)) == (B7|B6|B5) &&
583 ((b == 1) ||
584 ((b == 2) && (*c2&(B7|B6)) == B7))) {
585 return 0;
586 } else if((*c1&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4) &&
587 ((b == 1) ||
588 ((b == 2) && (*c2&(B7|B6)) == B7) ||
589 ((b == 3) && (*c2&(B7|B6)) == B7 && (*c3&(B7|B6)) == B7))) {
590 return 0;
591 } else {
592 return 1;
593 }
594 }
595
596 int
597 utf8size(char *s) {
598 uchar c = *s;
599
600 if(~c&B7) {
601 return 1;
602 } else if((c&(B7|B6|B5)) == (B7|B6)) {
603 return 2;
604 } else if((c&(B7|B6|B5|B4)) == (B7|B6|B5)) {
605 return 3;
606 } else {
607 return 4;
608 }
609 }
610
611 void
612 selinit(void) {
613 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
614 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
615 sel.mode = 0;
616 sel.bx = -1;
617 sel.clip = NULL;
618 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
619 if(sel.xtarget == None)
620 sel.xtarget = XA_STRING;
621 }
622
623 static int
624 x2col(int x) {
625 x -= borderpx;
626 x /= xw.cw;
627
628 return LIMIT(x, 0, term.col-1);
629 }
630
631 static int
632 y2row(int y) {
633 y -= borderpx;
634 y /= xw.ch;
635
636 return LIMIT(y, 0, term.row-1);
637 }
638
639 static inline bool
640 selected(int x, int y) {
641 int bx, ex;
642
643 if(sel.ey == y && sel.by == y) {
644 bx = MIN(sel.bx, sel.ex);
645 ex = MAX(sel.bx, sel.ex);
646
647 return BETWEEN(x, bx, ex);
648 }
649
650 if(sel.type == SEL_RECTANGULAR) {
651 return ((sel.b.y <= y && y <= sel.e.y)
652 && (sel.b.x <= x && x <= sel.e.x));
653 }
654 return ((sel.b.y < y && y < sel.e.y)
655 || (y == sel.e.y && x <= sel.e.x))
656 || (y == sel.b.y && x >= sel.b.x
657 && (x <= sel.e.x || sel.b.y != sel.e.y));
658 }
659
660 void
661 getbuttoninfo(XEvent *e) {
662 int type;
663 uint state = e->xbutton.state &~Button1Mask;
664
665 sel.alt = IS_SET(MODE_ALTSCREEN);
666
667 sel.ex = x2col(e->xbutton.x);
668 sel.ey = y2row(e->xbutton.y);
669
670 sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
671 sel.b.y = MIN(sel.by, sel.ey);
672 sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
673 sel.e.y = MAX(sel.by, sel.ey);
674
675 sel.type = SEL_REGULAR;
676 for(type = 1; type < LEN(selmasks); ++type) {
677 if(match(selmasks[type], state)) {
678 sel.type = type;
679 break;
680 }
681 }
682 }
683
684 void
685 mousereport(XEvent *e) {
686 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
687 button = e->xbutton.button, state = e->xbutton.state,
688 len;
689 char buf[40];
690 static int ob, ox, oy;
691
692 /* from urxvt */
693 if(e->xbutton.type == MotionNotify) {
694 if(!IS_SET(MODE_MOUSEMOTION) || (x == ox && y == oy))
695 return;
696 button = ob + 32;
697 ox = x, oy = y;
698 } else if(!IS_SET(MODE_MOUSESGR)
699 && (e->xbutton.type == ButtonRelease
700 || button == AnyButton)) {
701 button = 3;
702 } else {
703 button -= Button1;
704 if(button >= 3)
705 button += 64 - 3;
706 if(e->xbutton.type == ButtonPress) {
707 ob = button;
708 ox = x, oy = y;
709 }
710 }
711
712 button += (state & ShiftMask ? 4 : 0)
713 + (state & Mod4Mask ? 8 : 0)
714 + (state & ControlMask ? 16 : 0);
715
716 len = 0;
717 if(IS_SET(MODE_MOUSESGR)) {
718 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
719 button, x+1, y+1,
720 e->xbutton.type == ButtonRelease ? 'm' : 'M');
721 } else if(x < 223 && y < 223) {
722 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
723 32+button, 32+x+1, 32+y+1);
724 } else {
725 return;
726 }
727
728 ttywrite(buf, len);
729 }
730
731 void
732 bpress(XEvent *e) {
733 if(IS_SET(MODE_MOUSE)) {
734 mousereport(e);
735 } else if(e->xbutton.button == Button1) {
736 if(sel.bx != -1) {
737 sel.bx = -1;
738 tsetdirt(sel.b.y, sel.e.y);
739 draw();
740 }
741 sel.mode = 1;
742 sel.type = SEL_REGULAR;
743 sel.ex = sel.bx = x2col(e->xbutton.x);
744 sel.ey = sel.by = y2row(e->xbutton.y);
745 } else if(e->xbutton.button == Button4) {
746 ttywrite("\031", 1);
747 } else if(e->xbutton.button == Button5) {
748 ttywrite("\005", 1);
749 }
750 }
751
752 void
753 selcopy(void) {
754 char *str, *ptr;
755 int x, y, bufsize, size;
756 Glyph *gp, *last;
757
758 if(sel.bx == -1) {
759 str = NULL;
760 } else {
761 bufsize = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
762 ptr = str = xmalloc(bufsize);
763
764 /* append every set & selected glyph to the selection */
765 for(y = sel.b.y; y < sel.e.y + 1; y++) {
766 gp = &term.line[y][0];
767 last = gp + term.col;
768
769 while(--last >= gp && !(selected(last - gp, y) && \
770 strcmp(last->c, " ") != 0))
771 /* nothing */;
772
773 for(x = 0; gp <= last; x++, ++gp) {
774 if(!selected(x, y)) {
775 continue;
776 }
777
778 size = utf8size(gp->c);
779 memcpy(ptr, gp->c, size);
780 ptr += size;
781 }
782
783 /*
784 * Copy and pasting of line endings is inconsistent
785 * in the inconsistent terminal and GUI world.
786 * The best solution seems like to produce '\n' when
787 * something is copied from st and convert '\n' to
788 * '\r', when something to be pasted is received by
789 * st.
790 * FIXME: Fix the computer world.
791 */
792 if(y < sel.e.y)
793 *ptr++ = '\n';
794 }
795 *ptr = 0;
796 }
797 xsetsel(str);
798 }
799
800 void
801 selnotify(XEvent *e) {
802 ulong nitems, ofs, rem;
803 int format;
804 uchar *data, *last, *repl;
805 Atom type;
806
807 ofs = 0;
808 do {
809 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
810 False, AnyPropertyType, &type, &format,
811 &nitems, &rem, &data)) {
812 fprintf(stderr, "Clipboard allocation failed\n");
813 return;
814 }
815
816 /*
817 * As seen in selcopy:
818 * Line endings are inconsistent in the terminal and GUI world
819 * copy and pasting. When receiving some selection data,
820 * replace all '\n' with '\r'.
821 * FIXME: Fix the computer world.
822 */
823 repl = data;
824 last = data + nitems * format / 8;
825 while((repl = memchr(repl, '\n', last - repl))) {
826 *repl++ = '\r';
827 }
828
829 ttywrite((const char *)data, nitems * format / 8);
830 XFree(data);
831 /* number of 32-bit chunks returned */
832 ofs += nitems * format / 32;
833 } while(rem > 0);
834 }
835
836 void
837 selpaste(const Arg *dummy) {
838 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
839 xw.win, CurrentTime);
840 }
841
842 void
843 clippaste(const Arg *dummy) {
844 Atom clipboard;
845
846 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
847 XConvertSelection(xw.dpy, clipboard, sel.xtarget, XA_PRIMARY,
848 xw.win, CurrentTime);
849 }
850
851 void
852 selclear(XEvent *e) {
853 if(sel.bx == -1)
854 return;
855 sel.bx = -1;
856 tsetdirt(sel.b.y, sel.e.y);
857 }
858
859 void
860 selrequest(XEvent *e) {
861 XSelectionRequestEvent *xsre;
862 XSelectionEvent xev;
863 Atom xa_targets, string;
864
865 xsre = (XSelectionRequestEvent *) e;
866 xev.type = SelectionNotify;
867 xev.requestor = xsre->requestor;
868 xev.selection = xsre->selection;
869 xev.target = xsre->target;
870 xev.time = xsre->time;
871 /* reject */
872 xev.property = None;
873
874 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
875 if(xsre->target == xa_targets) {
876 /* respond with the supported type */
877 string = sel.xtarget;
878 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
879 XA_ATOM, 32, PropModeReplace,
880 (uchar *) &string, 1);
881 xev.property = xsre->property;
882 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
883 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
884 xsre->target, 8, PropModeReplace,
885 (uchar *) sel.clip, strlen(sel.clip));
886 xev.property = xsre->property;
887 }
888
889 /* all done, send a notification to the listener */
890 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
891 fprintf(stderr, "Error sending SelectionNotify event\n");
892 }
893
894 void
895 xsetsel(char *str) {
896 /* register the selection for both the clipboard and the primary */
897 Atom clipboard;
898
899 free(sel.clip);
900 sel.clip = str;
901
902 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
903
904 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
905 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
906 }
907
908 void
909 brelease(XEvent *e) {
910 struct timeval now;
911
912 if(IS_SET(MODE_MOUSE)) {
913 mousereport(e);
914 return;
915 }
916
917 if(e->xbutton.button == Button2) {
918 selpaste(NULL);
919 } else if(e->xbutton.button == Button1) {
920 sel.mode = 0;
921 getbuttoninfo(e);
922 term.dirty[sel.ey] = 1;
923 if(sel.bx == sel.ex && sel.by == sel.ey) {
924 sel.bx = -1;
925 gettimeofday(&now, NULL);
926
927 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
928 /* triple click on the line */
929 sel.b.x = sel.bx = 0;
930 sel.e.x = sel.ex = term.col;
931 sel.b.y = sel.e.y = sel.ey;
932 selcopy();
933 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
934 /* double click to select word */
935 sel.bx = sel.ex;
936 while(sel.bx > 0 && term.line[sel.ey][sel.bx-1].c[0] != ' ') {
937 sel.bx--;
938 }
939 sel.b.x = sel.bx;
940 while(sel.ex < term.col-1 && term.line[sel.ey][sel.ex+1].c[0] != ' ') {
941 sel.ex++;
942 }
943 sel.e.x = sel.ex;
944 sel.b.y = sel.e.y = sel.ey;
945 selcopy();
946 }
947 } else {
948 selcopy();
949 }
950 }
951
952 memcpy(&sel.tclick2, &sel.tclick1, sizeof(struct timeval));
953 gettimeofday(&sel.tclick1, NULL);
954 }
955
956 void
957 bmotion(XEvent *e) {
958 int oldey, oldex, oldsby, oldsey;
959
960 if(IS_SET(MODE_MOUSE)) {
961 mousereport(e);
962 return;
963 }
964
965 if(!sel.mode)
966 return;
967
968 oldey = sel.ey;
969 oldex = sel.ex;
970 oldsby = sel.b.y;
971 oldsey = sel.e.y;
972 getbuttoninfo(e);
973
974 if(oldey != sel.ey || oldex != sel.ex) {
975 tsetdirt(MIN(sel.b.y, oldsby), MAX(sel.e.y, oldsey));
976 }
977 }
978
979 void
980 die(const char *errstr, ...) {
981 va_list ap;
982
983 va_start(ap, errstr);
984 vfprintf(stderr, errstr, ap);
985 va_end(ap);
986 exit(EXIT_FAILURE);
987 }
988
989 void
990 execsh(void) {
991 char **args;
992 char *envshell = getenv("SHELL");
993 const struct passwd *pass = getpwuid(getuid());
994 char buf[sizeof(long) * 8 + 1];
995
996 unsetenv("COLUMNS");
997 unsetenv("LINES");
998 unsetenv("TERMCAP");
999
1000 if(pass) {
1001 setenv("LOGNAME", pass->pw_name, 1);
1002 setenv("USER", pass->pw_name, 1);
1003 setenv("SHELL", pass->pw_shell, 0);
1004 setenv("HOME", pass->pw_dir, 0);
1005 }
1006
1007 snprintf(buf, sizeof(buf), "%lu", xw.win);
1008 setenv("WINDOWID", buf, 1);
1009
1010 signal(SIGCHLD, SIG_DFL);
1011 signal(SIGHUP, SIG_DFL);
1012 signal(SIGINT, SIG_DFL);
1013 signal(SIGQUIT, SIG_DFL);
1014 signal(SIGTERM, SIG_DFL);
1015 signal(SIGALRM, SIG_DFL);
1016
1017 DEFAULT(envshell, shell);
1018 setenv("TERM", termname, 1);
1019 args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
1020 execvp(args[0], args);
1021 exit(EXIT_FAILURE);
1022 }
1023
1024 void
1025 sigchld(int a) {
1026 int stat = 0;
1027
1028 if(waitpid(pid, &stat, 0) < 0)
1029 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
1030
1031 if(WIFEXITED(stat)) {
1032 exit(WEXITSTATUS(stat));
1033 } else {
1034 exit(EXIT_FAILURE);
1035 }
1036 }
1037
1038 void
1039 ttynew(void) {
1040 int m, s;
1041 struct winsize w = {term.row, term.col, 0, 0};
1042
1043 /* seems to work fine on linux, openbsd and freebsd */
1044 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1045 die("openpty failed: %s\n", SERRNO);
1046
1047 switch(pid = fork()) {
1048 case -1:
1049 die("fork failed\n");
1050 break;
1051 case 0:
1052 setsid(); /* create a new process group */
1053 dup2(s, STDIN_FILENO);
1054 dup2(s, STDOUT_FILENO);
1055 dup2(s, STDERR_FILENO);
1056 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1057 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
1058 close(s);
1059 close(m);
1060 execsh();
1061 break;
1062 default:
1063 close(s);
1064 cmdfd = m;
1065 signal(SIGCHLD, sigchld);
1066 if(opt_io) {
1067 iofd = (!strcmp(opt_io, "-")) ?
1068 STDOUT_FILENO :
1069 open(opt_io, O_WRONLY | O_CREAT, 0666);
1070 if(iofd < 0) {
1071 fprintf(stderr, "Error opening %s:%s\n",
1072 opt_io, strerror(errno));
1073 }
1074 }
1075 }
1076 }
1077
1078 void
1079 dump(char c) {
1080 static int col;
1081
1082 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
1083 if(++col % 10 == 0)
1084 fprintf(stderr, "\n");
1085 }
1086
1087 void
1088 ttyread(void) {
1089 static char buf[BUFSIZ];
1090 static int buflen = 0;
1091 char *ptr;
1092 char s[UTF_SIZ];
1093 int charsize; /* size of utf8 char in bytes */
1094 long utf8c;
1095 int ret;
1096
1097 /* append read bytes to unprocessed bytes */
1098 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1099 die("Couldn't read from shell: %s\n", SERRNO);
1100
1101 /* process every complete utf8 char */
1102 buflen += ret;
1103 ptr = buf;
1104 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
1105 charsize = utf8decode(ptr, &utf8c);
1106 utf8encode(&utf8c, s);
1107 tputc(s, charsize);
1108 ptr += charsize;
1109 buflen -= charsize;
1110 }
1111
1112 /* keep any uncomplete utf8 char for the next call */
1113 memmove(buf, ptr, buflen);
1114 }
1115
1116 void
1117 ttywrite(const char *s, size_t n) {
1118 if(write(cmdfd, s, n) == -1)
1119 die("write error on tty: %s\n", SERRNO);
1120 }
1121
1122 void
1123 ttyresize(void) {
1124 struct winsize w;
1125
1126 w.ws_row = term.row;
1127 w.ws_col = term.col;
1128 w.ws_xpixel = xw.tw;
1129 w.ws_ypixel = xw.th;
1130 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1131 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
1132 }
1133
1134 void
1135 tsetdirt(int top, int bot) {
1136 int i;
1137
1138 LIMIT(top, 0, term.row-1);
1139 LIMIT(bot, 0, term.row-1);
1140
1141 for(i = top; i <= bot; i++)
1142 term.dirty[i] = 1;
1143 }
1144
1145 void
1146 tfulldirt(void) {
1147 tsetdirt(0, term.row-1);
1148 }
1149
1150 void
1151 tcursor(int mode) {
1152 static TCursor c;
1153
1154 if(mode == CURSOR_SAVE) {
1155 c = term.c;
1156 } else if(mode == CURSOR_LOAD) {
1157 term.c = c;
1158 tmoveto(c.x, c.y);
1159 }
1160 }
1161
1162 void
1163 treset(void) {
1164 uint i;
1165
1166 term.c = (TCursor){{
1167 .mode = ATTR_NULL,
1168 .fg = defaultfg,
1169 .bg = defaultbg
1170 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1171
1172 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1173 for(i = tabspaces; i < term.col; i += tabspaces)
1174 term.tabs[i] = 1;
1175 term.top = 0;
1176 term.bot = term.row - 1;
1177 term.mode = MODE_WRAP;
1178
1179 tclearregion(0, 0, term.col-1, term.row-1);
1180 tmoveto(0, 0);
1181 tcursor(CURSOR_SAVE);
1182 }
1183
1184 void
1185 tnew(int col, int row) {
1186 memset(&term, 0, sizeof(Term));
1187 tresize(col, row);
1188 term.numlock = 1;
1189
1190 treset();
1191 }
1192
1193 void
1194 tswapscreen(void) {
1195 Line *tmp = term.line;
1196
1197 term.line = term.alt;
1198 term.alt = tmp;
1199 term.mode ^= MODE_ALTSCREEN;
1200 tfulldirt();
1201 }
1202
1203 void
1204 tscrolldown(int orig, int n) {
1205 int i;
1206 Line temp;
1207
1208 LIMIT(n, 0, term.bot-orig+1);
1209
1210 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1211
1212 for(i = term.bot; i >= orig+n; i--) {
1213 temp = term.line[i];
1214 term.line[i] = term.line[i-n];
1215 term.line[i-n] = temp;
1216
1217 term.dirty[i] = 1;
1218 term.dirty[i-n] = 1;
1219 }
1220
1221 selscroll(orig, n);
1222 }
1223
1224 void
1225 tscrollup(int orig, int n) {
1226 int i;
1227 Line temp;
1228 LIMIT(n, 0, term.bot-orig+1);
1229
1230 tclearregion(0, orig, term.col-1, orig+n-1);
1231
1232 for(i = orig; i <= term.bot-n; i++) {
1233 temp = term.line[i];
1234 term.line[i] = term.line[i+n];
1235 term.line[i+n] = temp;
1236
1237 term.dirty[i] = 1;
1238 term.dirty[i+n] = 1;
1239 }
1240
1241 selscroll(orig, -n);
1242 }
1243
1244 void
1245 selscroll(int orig, int n) {
1246 if(sel.bx == -1)
1247 return;
1248
1249 if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
1250 if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
1251 sel.bx = -1;
1252 return;
1253 }
1254 if(sel.type == SEL_RECTANGULAR) {
1255 if(sel.by < term.top)
1256 sel.by = term.top;
1257 if(sel.ey > term.bot)
1258 sel.ey = term.bot;
1259 } else {
1260 if(sel.by < term.top) {
1261 sel.by = term.top;
1262 sel.bx = 0;
1263 }
1264 if(sel.ey > term.bot) {
1265 sel.ey = term.bot;
1266 sel.ex = term.col;
1267 }
1268 }
1269 sel.b.y = sel.by, sel.b.x = sel.bx;
1270 sel.e.y = sel.ey, sel.e.x = sel.ex;
1271 }
1272 }
1273
1274 void
1275 tnewline(int first_col) {
1276 int y = term.c.y;
1277
1278 if(y == term.bot) {
1279 tscrollup(term.top, 1);
1280 } else {
1281 y++;
1282 }
1283 tmoveto(first_col ? 0 : term.c.x, y);
1284 }
1285
1286 void
1287 csiparse(void) {
1288 char *p = csiescseq.buf, *np;
1289 long int v;
1290
1291 csiescseq.narg = 0;
1292 if(*p == '?') {
1293 csiescseq.priv = 1;
1294 p++;
1295 }
1296
1297 csiescseq.buf[csiescseq.len] = '\0';
1298 while(p < csiescseq.buf+csiescseq.len) {
1299 np = NULL;
1300 v = strtol(p, &np, 10);
1301 if(np == p)
1302 v = 0;
1303 if(v == LONG_MAX || v == LONG_MIN)
1304 v = -1;
1305 csiescseq.arg[csiescseq.narg++] = v;
1306 p = np;
1307 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1308 break;
1309 p++;
1310 }
1311 csiescseq.mode = *p;
1312 }
1313
1314 /* for absolute user moves, when decom is set */
1315 void
1316 tmoveato(int x, int y) {
1317 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1318 }
1319
1320 void
1321 tmoveto(int x, int y) {
1322 int miny, maxy;
1323
1324 if(term.c.state & CURSOR_ORIGIN) {
1325 miny = term.top;
1326 maxy = term.bot;
1327 } else {
1328 miny = 0;
1329 maxy = term.row - 1;
1330 }
1331 LIMIT(x, 0, term.col-1);
1332 LIMIT(y, miny, maxy);
1333 term.c.state &= ~CURSOR_WRAPNEXT;
1334 term.c.x = x;
1335 term.c.y = y;
1336 }
1337
1338 void
1339 tsetchar(char *c, Glyph *attr, int x, int y) {
1340 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1341 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1342 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1343 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1344 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1345 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1346 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1347 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1348 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1349 };
1350
1351 /*
1352 * The table is proudly stolen from rxvt.
1353 */
1354 if(attr->mode & ATTR_GFX) {
1355 if(c[0] >= 0x41 && c[0] <= 0x7e
1356 && vt100_0[c[0] - 0x41]) {
1357 c = vt100_0[c[0] - 0x41];
1358 }
1359 }
1360
1361 term.dirty[y] = 1;
1362 term.line[y][x] = *attr;
1363 memcpy(term.line[y][x].c, c, UTF_SIZ);
1364 }
1365
1366 void
1367 tclearregion(int x1, int y1, int x2, int y2) {
1368 int x, y, temp;
1369
1370 if(x1 > x2)
1371 temp = x1, x1 = x2, x2 = temp;
1372 if(y1 > y2)
1373 temp = y1, y1 = y2, y2 = temp;
1374
1375 LIMIT(x1, 0, term.col-1);
1376 LIMIT(x2, 0, term.col-1);
1377 LIMIT(y1, 0, term.row-1);
1378 LIMIT(y2, 0, term.row-1);
1379
1380 for(y = y1; y <= y2; y++) {
1381 term.dirty[y] = 1;
1382 for(x = x1; x <= x2; x++) {
1383 term.line[y][x] = term.c.attr;
1384 memcpy(term.line[y][x].c, " ", 2);
1385 }
1386 }
1387 }
1388
1389 void
1390 tdeletechar(int n) {
1391 int src = term.c.x + n;
1392 int dst = term.c.x;
1393 int size = term.col - src;
1394
1395 term.dirty[term.c.y] = 1;
1396
1397 if(src >= term.col) {
1398 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1399 return;
1400 }
1401
1402 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1403 size * sizeof(Glyph));
1404 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1405 }
1406
1407 void
1408 tinsertblank(int n) {
1409 int src = term.c.x;
1410 int dst = src + n;
1411 int size = term.col - dst;
1412
1413 term.dirty[term.c.y] = 1;
1414
1415 if(dst >= term.col) {
1416 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1417 return;
1418 }
1419
1420 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1421 size * sizeof(Glyph));
1422 tclearregion(src, term.c.y, dst - 1, term.c.y);
1423 }
1424
1425 void
1426 tinsertblankline(int n) {
1427 if(term.c.y < term.top || term.c.y > term.bot)
1428 return;
1429
1430 tscrolldown(term.c.y, n);
1431 }
1432
1433 void
1434 tdeleteline(int n) {
1435 if(term.c.y < term.top || term.c.y > term.bot)
1436 return;
1437
1438 tscrollup(term.c.y, n);
1439 }
1440
1441 void
1442 tsetattr(int *attr, int l) {
1443 int i;
1444
1445 for(i = 0; i < l; i++) {
1446 switch(attr[i]) {
1447 case 0:
1448 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE \
1449 | ATTR_BOLD | ATTR_ITALIC \
1450 | ATTR_BLINK);
1451 term.c.attr.fg = defaultfg;
1452 term.c.attr.bg = defaultbg;
1453 break;
1454 case 1:
1455 term.c.attr.mode |= ATTR_BOLD;
1456 break;
1457 case 3:
1458 term.c.attr.mode |= ATTR_ITALIC;
1459 break;
1460 case 4:
1461 term.c.attr.mode |= ATTR_UNDERLINE;
1462 break;
1463 case 5: /* slow blink */
1464 case 6: /* rapid blink */
1465 term.c.attr.mode |= ATTR_BLINK;
1466 break;
1467 case 7:
1468 term.c.attr.mode |= ATTR_REVERSE;
1469 break;
1470 case 21:
1471 case 22:
1472 term.c.attr.mode &= ~ATTR_BOLD;
1473 break;
1474 case 23:
1475 term.c.attr.mode &= ~ATTR_ITALIC;
1476 break;
1477 case 24:
1478 term.c.attr.mode &= ~ATTR_UNDERLINE;
1479 break;
1480 case 25:
1481 case 26:
1482 term.c.attr.mode &= ~ATTR_BLINK;
1483 break;
1484 case 27:
1485 term.c.attr.mode &= ~ATTR_REVERSE;
1486 break;
1487 case 38:
1488 if(i + 2 < l && attr[i + 1] == 5) {
1489 i += 2;
1490 if(BETWEEN(attr[i], 0, 255)) {
1491 term.c.attr.fg = attr[i];
1492 } else {
1493 fprintf(stderr,
1494 "erresc: bad fgcolor %d\n",
1495 attr[i]);
1496 }
1497 } else {
1498 fprintf(stderr,
1499 "erresc(38): gfx attr %d unknown\n",
1500 attr[i]);
1501 }
1502 break;
1503 case 39:
1504 term.c.attr.fg = defaultfg;
1505 break;
1506 case 48:
1507 if(i + 2 < l && attr[i + 1] == 5) {
1508 i += 2;
1509 if(BETWEEN(attr[i], 0, 255)) {
1510 term.c.attr.bg = attr[i];
1511 } else {
1512 fprintf(stderr,
1513 "erresc: bad bgcolor %d\n",
1514 attr[i]);
1515 }
1516 } else {
1517 fprintf(stderr,
1518 "erresc(48): gfx attr %d unknown\n",
1519 attr[i]);
1520 }
1521 break;
1522 case 49:
1523 term.c.attr.bg = defaultbg;
1524 break;
1525 default:
1526 if(BETWEEN(attr[i], 30, 37)) {
1527 term.c.attr.fg = attr[i] - 30;
1528 } else if(BETWEEN(attr[i], 40, 47)) {
1529 term.c.attr.bg = attr[i] - 40;
1530 } else if(BETWEEN(attr[i], 90, 97)) {
1531 term.c.attr.fg = attr[i] - 90 + 8;
1532 } else if(BETWEEN(attr[i], 100, 107)) {
1533 term.c.attr.bg = attr[i] - 100 + 8;
1534 } else {
1535 fprintf(stderr,
1536 "erresc(default): gfx attr %d unknown\n",
1537 attr[i]), csidump();
1538 }
1539 break;
1540 }
1541 }
1542 }
1543
1544 void
1545 tsetscroll(int t, int b) {
1546 int temp;
1547
1548 LIMIT(t, 0, term.row-1);
1549 LIMIT(b, 0, term.row-1);
1550 if(t > b) {
1551 temp = t;
1552 t = b;
1553 b = temp;
1554 }
1555 term.top = t;
1556 term.bot = b;
1557 }
1558
1559 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1560
1561 void
1562 tsetmode(bool priv, bool set, int *args, int narg) {
1563 int *lim, mode;
1564 bool alt;
1565
1566 for(lim = args + narg; args < lim; ++args) {
1567 if(priv) {
1568 switch(*args) {
1569 break;
1570 case 1: /* DECCKM -- Cursor key */
1571 MODBIT(term.mode, set, MODE_APPCURSOR);
1572 break;
1573 case 5: /* DECSCNM -- Reverse video */
1574 mode = term.mode;
1575 MODBIT(term.mode, set, MODE_REVERSE);
1576 if(mode != term.mode)
1577 redraw(REDRAW_TIMEOUT);
1578 break;
1579 case 6: /* DECOM -- Origin */
1580 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1581 tmoveato(0, 0);
1582 break;
1583 case 7: /* DECAWM -- Auto wrap */
1584 MODBIT(term.mode, set, MODE_WRAP);
1585 break;
1586 case 0: /* Error (IGNORED) */
1587 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1588 case 3: /* DECCOLM -- Column (IGNORED) */
1589 case 4: /* DECSCLM -- Scroll (IGNORED) */
1590 case 8: /* DECARM -- Auto repeat (IGNORED) */
1591 case 18: /* DECPFF -- Printer feed (IGNORED) */
1592 case 19: /* DECPEX -- Printer extent (IGNORED) */
1593 case 42: /* DECNRCM -- National characters (IGNORED) */
1594 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1595 break;
1596 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1597 MODBIT(term.mode, !set, MODE_HIDE);
1598 break;
1599 case 1000: /* 1000,1002: enable xterm mouse report */
1600 MODBIT(term.mode, set, MODE_MOUSEBTN);
1601 MODBIT(term.mode, 0, MODE_MOUSEMOTION);
1602 break;
1603 case 1002:
1604 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1605 MODBIT(term.mode, 0, MODE_MOUSEBTN);
1606 break;
1607 case 1006:
1608 MODBIT(term.mode, set, MODE_MOUSESGR);
1609 break;
1610 case 1049: /* = 1047 and 1048 */
1611 case 47:
1612 case 1047:
1613 if (!allowaltscreen)
1614 break;
1615
1616 alt = IS_SET(MODE_ALTSCREEN);
1617 if(alt) {
1618 tclearregion(0, 0, term.col-1,
1619 term.row-1);
1620 }
1621 if(set ^ alt) /* set is always 1 or 0 */
1622 tswapscreen();
1623 if(*args != 1049)
1624 break;
1625 /* FALLTRU */
1626 case 1048:
1627 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1628 break;
1629 default:
1630 fprintf(stderr,
1631 "erresc: unknown private set/reset mode %d\n",
1632 *args);
1633 break;
1634 }
1635 } else {
1636 switch(*args) {
1637 case 0: /* Error (IGNORED) */
1638 break;
1639 case 2: /* KAM -- keyboard action */
1640 MODBIT(term.mode, set, MODE_KBDLOCK);
1641 break;
1642 case 4: /* IRM -- Insertion-replacement */
1643 MODBIT(term.mode, set, MODE_INSERT);
1644 break;
1645 case 12: /* SRM -- Send/Receive */
1646 MODBIT(term.mode, !set, MODE_ECHO);
1647 break;
1648 case 20: /* LNM -- Linefeed/new line */
1649 MODBIT(term.mode, set, MODE_CRLF);
1650 break;
1651 default:
1652 fprintf(stderr,
1653 "erresc: unknown set/reset mode %d\n",
1654 *args);
1655 break;
1656 }
1657 }
1658 }
1659 }
1660 #undef MODBIT
1661
1662
1663 void
1664 csihandle(void) {
1665 switch(csiescseq.mode) {
1666 default:
1667 unknown:
1668 fprintf(stderr, "erresc: unknown csi ");
1669 csidump();
1670 /* die(""); */
1671 break;
1672 case '@': /* ICH -- Insert <n> blank char */
1673 DEFAULT(csiescseq.arg[0], 1);
1674 tinsertblank(csiescseq.arg[0]);
1675 break;
1676 case 'A': /* CUU -- Cursor <n> Up */
1677 DEFAULT(csiescseq.arg[0], 1);
1678 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1679 break;
1680 case 'B': /* CUD -- Cursor <n> Down */
1681 case 'e': /* VPR --Cursor <n> Down */
1682 DEFAULT(csiescseq.arg[0], 1);
1683 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1684 break;
1685 case 'c': /* DA -- Device Attributes */
1686 if(csiescseq.arg[0] == 0)
1687 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1688 break;
1689 case 'C': /* CUF -- Cursor <n> Forward */
1690 case 'a': /* HPR -- Cursor <n> Forward */
1691 DEFAULT(csiescseq.arg[0], 1);
1692 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1693 break;
1694 case 'D': /* CUB -- Cursor <n> Backward */
1695 DEFAULT(csiescseq.arg[0], 1);
1696 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1697 break;
1698 case 'E': /* CNL -- Cursor <n> Down and first col */
1699 DEFAULT(csiescseq.arg[0], 1);
1700 tmoveto(0, term.c.y+csiescseq.arg[0]);
1701 break;
1702 case 'F': /* CPL -- Cursor <n> Up and first col */
1703 DEFAULT(csiescseq.arg[0], 1);
1704 tmoveto(0, term.c.y-csiescseq.arg[0]);
1705 break;
1706 case 'g': /* TBC -- Tabulation clear */
1707 switch(csiescseq.arg[0]) {
1708 case 0: /* clear current tab stop */
1709 term.tabs[term.c.x] = 0;
1710 break;
1711 case 3: /* clear all the tabs */
1712 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1713 break;
1714 default:
1715 goto unknown;
1716 }
1717 break;
1718 case 'G': /* CHA -- Move to <col> */
1719 case '`': /* HPA */
1720 DEFAULT(csiescseq.arg[0], 1);
1721 tmoveto(csiescseq.arg[0]-1, term.c.y);
1722 break;
1723 case 'H': /* CUP -- Move to <row> <col> */
1724 case 'f': /* HVP */
1725 DEFAULT(csiescseq.arg[0], 1);
1726 DEFAULT(csiescseq.arg[1], 1);
1727 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1728 break;
1729 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1730 DEFAULT(csiescseq.arg[0], 1);
1731 while(csiescseq.arg[0]--)
1732 tputtab(1);
1733 break;
1734 case 'J': /* ED -- Clear screen */
1735 sel.bx = -1;
1736 switch(csiescseq.arg[0]) {
1737 case 0: /* below */
1738 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1739 if(term.c.y < term.row-1) {
1740 tclearregion(0, term.c.y+1, term.col-1,
1741 term.row-1);
1742 }
1743 break;
1744 case 1: /* above */
1745 if(term.c.y > 1)
1746 tclearregion(0, 0, term.col-1, term.c.y-1);
1747 tclearregion(0, term.c.y, term.c.x, term.c.y);
1748 break;
1749 case 2: /* all */
1750 tclearregion(0, 0, term.col-1, term.row-1);
1751 break;
1752 default:
1753 goto unknown;
1754 }
1755 break;
1756 case 'K': /* EL -- Clear line */
1757 switch(csiescseq.arg[0]) {
1758 case 0: /* right */
1759 tclearregion(term.c.x, term.c.y, term.col-1,
1760 term.c.y);
1761 break;
1762 case 1: /* left */
1763 tclearregion(0, term.c.y, term.c.x, term.c.y);
1764 break;
1765 case 2: /* all */
1766 tclearregion(0, term.c.y, term.col-1, term.c.y);
1767 break;
1768 }
1769 break;
1770 case 'S': /* SU -- Scroll <n> line up */
1771 DEFAULT(csiescseq.arg[0], 1);
1772 tscrollup(term.top, csiescseq.arg[0]);
1773 break;
1774 case 'T': /* SD -- Scroll <n> line down */
1775 DEFAULT(csiescseq.arg[0], 1);
1776 tscrolldown(term.top, csiescseq.arg[0]);
1777 break;
1778 case 'L': /* IL -- Insert <n> blank lines */
1779 DEFAULT(csiescseq.arg[0], 1);
1780 tinsertblankline(csiescseq.arg[0]);
1781 break;
1782 case 'l': /* RM -- Reset Mode */
1783 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
1784 break;
1785 case 'M': /* DL -- Delete <n> lines */
1786 DEFAULT(csiescseq.arg[0], 1);
1787 tdeleteline(csiescseq.arg[0]);
1788 break;
1789 case 'X': /* ECH -- Erase <n> char */
1790 DEFAULT(csiescseq.arg[0], 1);
1791 tclearregion(term.c.x, term.c.y,
1792 term.c.x + csiescseq.arg[0] - 1, term.c.y);
1793 break;
1794 case 'P': /* DCH -- Delete <n> char */
1795 DEFAULT(csiescseq.arg[0], 1);
1796 tdeletechar(csiescseq.arg[0]);
1797 break;
1798 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
1799 DEFAULT(csiescseq.arg[0], 1);
1800 while(csiescseq.arg[0]--)
1801 tputtab(0);
1802 break;
1803 case 'd': /* VPA -- Move to <row> */
1804 DEFAULT(csiescseq.arg[0], 1);
1805 tmoveato(term.c.x, csiescseq.arg[0]-1);
1806 break;
1807 case 'h': /* SM -- Set terminal mode */
1808 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
1809 break;
1810 case 'm': /* SGR -- Terminal attribute (color) */
1811 tsetattr(csiescseq.arg, csiescseq.narg);
1812 break;
1813 case 'r': /* DECSTBM -- Set Scrolling Region */
1814 if(csiescseq.priv) {
1815 goto unknown;
1816 } else {
1817 DEFAULT(csiescseq.arg[0], 1);
1818 DEFAULT(csiescseq.arg[1], term.row);
1819 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
1820 tmoveato(0, 0);
1821 }
1822 break;
1823 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1824 tcursor(CURSOR_SAVE);
1825 break;
1826 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1827 tcursor(CURSOR_LOAD);
1828 break;
1829 }
1830 }
1831
1832 void
1833 csidump(void) {
1834 int i;
1835 uint c;
1836
1837 printf("ESC[");
1838 for(i = 0; i < csiescseq.len; i++) {
1839 c = csiescseq.buf[i] & 0xff;
1840 if(isprint(c)) {
1841 putchar(c);
1842 } else if(c == '\n') {
1843 printf("(\\n)");
1844 } else if(c == '\r') {
1845 printf("(\\r)");
1846 } else if(c == 0x1b) {
1847 printf("(\\e)");
1848 } else {
1849 printf("(%02x)", c);
1850 }
1851 }
1852 putchar('\n');
1853 }
1854
1855 void
1856 csireset(void) {
1857 memset(&csiescseq, 0, sizeof(csiescseq));
1858 }
1859
1860 void
1861 strhandle(void) {
1862 char *p = NULL;
1863 int i, j, narg;
1864
1865 strparse();
1866 narg = strescseq.narg;
1867
1868 switch(strescseq.type) {
1869 case ']': /* OSC -- Operating System Command */
1870 switch(i = atoi(strescseq.args[0])) {
1871 case 0:
1872 case 1:
1873 case 2:
1874 if(narg > 1)
1875 xsettitle(strescseq.args[1]);
1876 break;
1877 case 4: /* color set */
1878 if(narg < 3)
1879 break;
1880 p = strescseq.args[2];
1881 /* fall through */
1882 case 104: /* color reset, here p = NULL */
1883 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
1884 if (!xsetcolorname(j, p)) {
1885 fprintf(stderr, "erresc: invalid color %s\n", p);
1886 } else {
1887 /*
1888 * TODO if defaultbg color is changed, borders
1889 * are dirty
1890 */
1891 redraw(0);
1892 }
1893 break;
1894 default:
1895 fprintf(stderr, "erresc: unknown str ");
1896 strdump();
1897 break;
1898 }
1899 break;
1900 case 'k': /* old title set compatibility */
1901 xsettitle(strescseq.args[0]);
1902 break;
1903 case 'P': /* DSC -- Device Control String */
1904 case '_': /* APC -- Application Program Command */
1905 case '^': /* PM -- Privacy Message */
1906 default:
1907 fprintf(stderr, "erresc: unknown str ");
1908 strdump();
1909 /* die(""); */
1910 break;
1911 }
1912 }
1913
1914 void
1915 strparse(void) {
1916 char *p = strescseq.buf;
1917
1918 strescseq.narg = 0;
1919 strescseq.buf[strescseq.len] = '\0';
1920 while(p && strescseq.narg < STR_ARG_SIZ)
1921 strescseq.args[strescseq.narg++] = strsep(&p, ";");
1922 }
1923
1924 void
1925 strdump(void) {
1926 int i;
1927 uint c;
1928
1929 printf("ESC%c", strescseq.type);
1930 for(i = 0; i < strescseq.len; i++) {
1931 c = strescseq.buf[i] & 0xff;
1932 if(c == '\0') {
1933 return;
1934 } else if(isprint(c)) {
1935 putchar(c);
1936 } else if(c == '\n') {
1937 printf("(\\n)");
1938 } else if(c == '\r') {
1939 printf("(\\r)");
1940 } else if(c == 0x1b) {
1941 printf("(\\e)");
1942 } else {
1943 printf("(%02x)", c);
1944 }
1945 }
1946 printf("ESC\\\n");
1947 }
1948
1949 void
1950 strreset(void) {
1951 memset(&strescseq, 0, sizeof(strescseq));
1952 }
1953
1954 void
1955 tputtab(bool forward) {
1956 uint x = term.c.x;
1957
1958 if(forward) {
1959 if(x == term.col)
1960 return;
1961 for(++x; x < term.col && !term.tabs[x]; ++x)
1962 /* nothing */ ;
1963 } else {
1964 if(x == 0)
1965 return;
1966 for(--x; x > 0 && !term.tabs[x]; --x)
1967 /* nothing */ ;
1968 }
1969 tmoveto(x, term.c.y);
1970 }
1971
1972 void
1973 techo(char *buf, int len) {
1974 for(; len > 0; buf++, len--) {
1975 char c = *buf;
1976
1977 if(c == '\033') { /* escape */
1978 tputc("^", 1);
1979 tputc("[", 1);
1980 } else if(c < '\x20') { /* control code */
1981 if(c != '\n' && c != '\r' && c != '\t') {
1982 c |= '\x40';
1983 tputc("^", 1);
1984 }
1985 tputc(&c, 1);
1986 } else {
1987 break;
1988 }
1989 }
1990 if(len)
1991 tputc(buf, len);
1992 }
1993
1994 void
1995 tputc(char *c, int len) {
1996 uchar ascii = *c;
1997 bool control = ascii < '\x20' || ascii == 0177;
1998
1999 if(iofd != -1) {
2000 if(xwrite(iofd, c, len) < 0) {
2001 fprintf(stderr, "Error writing in %s:%s\n",
2002 opt_io, strerror(errno));
2003 close(iofd);
2004 iofd = -1;
2005 }
2006 }
2007
2008 /*
2009 * STR sequences must be checked before anything else
2010 * because it can use some control codes as part of the sequence.
2011 */
2012 if(term.esc & ESC_STR) {
2013 switch(ascii) {
2014 case '\033':
2015 term.esc = ESC_START | ESC_STR_END;
2016 break;
2017 case '\a': /* backwards compatibility to xterm */
2018 term.esc = 0;
2019 strhandle();
2020 break;
2021 default:
2022 if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2023 memmove(&strescseq.buf[strescseq.len], c, len);
2024 strescseq.len += len;
2025 } else {
2026 /*
2027 * Here is a bug in terminals. If the user never sends
2028 * some code to stop the str or esc command, then st
2029 * will stop responding. But this is better than
2030 * silently failing with unknown characters. At least
2031 * then users will report back.
2032 *
2033 * In the case users ever get fixed, here is the code:
2034 */
2035 /*
2036 * term.esc = 0;
2037 * strhandle();
2038 */
2039 }
2040 }
2041 return;
2042 }
2043
2044 /*
2045 * Actions of control codes must be performed as soon they arrive
2046 * because they can be embedded inside a control sequence, and
2047 * they must not cause conflicts with sequences.
2048 */
2049 if(control) {
2050 switch(ascii) {
2051 case '\t': /* HT */
2052 tputtab(1);
2053 return;
2054 case '\b': /* BS */
2055 tmoveto(term.c.x-1, term.c.y);
2056 return;
2057 case '\r': /* CR */
2058 tmoveto(0, term.c.y);
2059 return;
2060 case '\f': /* LF */
2061 case '\v': /* VT */
2062 case '\n': /* LF */
2063 /* go to first col if the mode is set */
2064 tnewline(IS_SET(MODE_CRLF));
2065 return;
2066 case '\a': /* BEL */
2067 if(!(xw.state & WIN_FOCUSED))
2068 xseturgency(1);
2069 return;
2070 case '\033': /* ESC */
2071 csireset();
2072 term.esc = ESC_START;
2073 return;
2074 case '\016': /* SO */
2075 case '\017': /* SI */
2076 /*
2077 * Different charsets are hard to handle. Applications
2078 * should use the right alt charset escapes for the
2079 * only reason they still exist: line drawing. The
2080 * rest is incompatible history st should not support.
2081 */
2082 return;
2083 case '\032': /* SUB */
2084 case '\030': /* CAN */
2085 csireset();
2086 return;
2087 case '\005': /* ENQ (IGNORED) */
2088 case '\000': /* NUL (IGNORED) */
2089 case '\021': /* XON (IGNORED) */
2090 case '\023': /* XOFF (IGNORED) */
2091 case 0177: /* DEL (IGNORED) */
2092 return;
2093 }
2094 } else if(term.esc & ESC_START) {
2095 if(term.esc & ESC_CSI) {
2096 csiescseq.buf[csiescseq.len++] = ascii;
2097 if(BETWEEN(ascii, 0x40, 0x7E)
2098 || csiescseq.len >= \
2099 sizeof(csiescseq.buf)-1) {
2100 term.esc = 0;
2101 csiparse();
2102 csihandle();
2103 }
2104 } else if(term.esc & ESC_STR_END) {
2105 term.esc = 0;
2106 if(ascii == '\\')
2107 strhandle();
2108 } else if(term.esc & ESC_ALTCHARSET) {
2109 switch(ascii) {
2110 case '0': /* Line drawing set */
2111 term.c.attr.mode |= ATTR_GFX;
2112 break;
2113 case 'B': /* USASCII */
2114 term.c.attr.mode &= ~ATTR_GFX;
2115 break;
2116 case 'A': /* UK (IGNORED) */
2117 case '<': /* multinational charset (IGNORED) */
2118 case '5': /* Finnish (IGNORED) */
2119 case 'C': /* Finnish (IGNORED) */
2120 case 'K': /* German (IGNORED) */
2121 break;
2122 default:
2123 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2124 }
2125 term.esc = 0;
2126 } else if(term.esc & ESC_TEST) {
2127 if(ascii == '8') { /* DEC screen alignment test. */
2128 char E[UTF_SIZ] = "E";
2129 int x, y;
2130
2131 for(x = 0; x < term.col; ++x) {
2132 for(y = 0; y < term.row; ++y)
2133 tsetchar(E, &term.c.attr, x, y);
2134 }
2135 }
2136 term.esc = 0;
2137 } else {
2138 switch(ascii) {
2139 case '[':
2140 term.esc |= ESC_CSI;
2141 break;
2142 case '#':
2143 term.esc |= ESC_TEST;
2144 break;
2145 case 'P': /* DCS -- Device Control String */
2146 case '_': /* APC -- Application Program Command */
2147 case '^': /* PM -- Privacy Message */
2148 case ']': /* OSC -- Operating System Command */
2149 case 'k': /* old title set compatibility */
2150 strreset();
2151 strescseq.type = ascii;
2152 term.esc |= ESC_STR;
2153 break;
2154 case '(': /* set primary charset G0 */
2155 term.esc |= ESC_ALTCHARSET;
2156 break;
2157 case ')': /* set secondary charset G1 (IGNORED) */
2158 case '*': /* set tertiary charset G2 (IGNORED) */
2159 case '+': /* set quaternary charset G3 (IGNORED) */
2160 term.esc = 0;
2161 break;
2162 case 'D': /* IND -- Linefeed */
2163 if(term.c.y == term.bot) {
2164 tscrollup(term.top, 1);
2165 } else {
2166 tmoveto(term.c.x, term.c.y+1);
2167 }
2168 term.esc = 0;
2169 break;
2170 case 'E': /* NEL -- Next line */
2171 tnewline(1); /* always go to first col */
2172 term.esc = 0;
2173 break;
2174 case 'H': /* HTS -- Horizontal tab stop */
2175 term.tabs[term.c.x] = 1;
2176 term.esc = 0;
2177 break;
2178 case 'M': /* RI -- Reverse index */
2179 if(term.c.y == term.top) {
2180 tscrolldown(term.top, 1);
2181 } else {
2182 tmoveto(term.c.x, term.c.y-1);
2183 }
2184 term.esc = 0;
2185 break;
2186 case 'Z': /* DECID -- Identify Terminal */
2187 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2188 term.esc = 0;
2189 break;
2190 case 'c': /* RIS -- Reset to inital state */
2191 treset();
2192 term.esc = 0;
2193 xresettitle();
2194 break;
2195 case '=': /* DECPAM -- Application keypad */
2196 term.mode |= MODE_APPKEYPAD;
2197 term.esc = 0;
2198 break;
2199 case '>': /* DECPNM -- Normal keypad */
2200 term.mode &= ~MODE_APPKEYPAD;
2201 term.esc = 0;
2202 break;
2203 case '7': /* DECSC -- Save Cursor */
2204 tcursor(CURSOR_SAVE);
2205 term.esc = 0;
2206 break;
2207 case '8': /* DECRC -- Restore Cursor */
2208 tcursor(CURSOR_LOAD);
2209 term.esc = 0;
2210 break;
2211 case '\\': /* ST -- Stop */
2212 term.esc = 0;
2213 break;
2214 default:
2215 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2216 (uchar) ascii, isprint(ascii)? ascii:'.');
2217 term.esc = 0;
2218 }
2219 }
2220 /*
2221 * All characters which form part of a sequence are not
2222 * printed
2223 */
2224 return;
2225 }
2226 /*
2227 * Display control codes only if we are in graphic mode
2228 */
2229 if(control && !(term.c.attr.mode & ATTR_GFX))
2230 return;
2231 if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
2232 sel.bx = -1;
2233 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
2234 tnewline(1); /* always go to first col */
2235
2236 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col) {
2237 memmove(&term.line[term.c.y][term.c.x+1],
2238 &term.line[term.c.y][term.c.x],
2239 (term.col - term.c.x - 1) * sizeof(Glyph));
2240 }
2241
2242 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2243 if(term.c.x+1 < term.col) {
2244 tmoveto(term.c.x+1, term.c.y);
2245 } else {
2246 term.c.state |= CURSOR_WRAPNEXT;
2247 }
2248 }
2249
2250 int
2251 tresize(int col, int row) {
2252 int i;
2253 int minrow = MIN(row, term.row);
2254 int mincol = MIN(col, term.col);
2255 int slide = term.c.y - row + 1;
2256 bool *bp;
2257 Line *orig;
2258
2259 if(col < 1 || row < 1)
2260 return 0;
2261
2262 /* free unneeded rows */
2263 i = 0;
2264 if(slide > 0) {
2265 /*
2266 * slide screen to keep cursor where we expect it -
2267 * tscrollup would work here, but we can optimize to
2268 * memmove because we're freeing the earlier lines
2269 */
2270 for(/* i = 0 */; i < slide; i++) {
2271 free(term.line[i]);
2272 free(term.alt[i]);
2273 }
2274 memmove(term.line, term.line + slide, row * sizeof(Line));
2275 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2276 }
2277 for(i += row; i < term.row; i++) {
2278 free(term.line[i]);
2279 free(term.alt[i]);
2280 }
2281
2282 /* resize to new height */
2283 term.line = xrealloc(term.line, row * sizeof(Line));
2284 term.alt = xrealloc(term.alt, row * sizeof(Line));
2285 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2286 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2287
2288 /* resize each row to new width, zero-pad if needed */
2289 for(i = 0; i < minrow; i++) {
2290 term.dirty[i] = 1;
2291 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2292 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2293 }
2294
2295 /* allocate any new rows */
2296 for(/* i == minrow */; i < row; i++) {
2297 term.dirty[i] = 1;
2298 term.line[i] = xcalloc(col, sizeof(Glyph));
2299 term.alt [i] = xcalloc(col, sizeof(Glyph));
2300 }
2301 if(col > term.col) {
2302 bp = term.tabs + term.col;
2303
2304 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2305 while(--bp > term.tabs && !*bp)
2306 /* nothing */ ;
2307 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2308 *bp = 1;
2309 }
2310 /* update terminal size */
2311 term.col = col;
2312 term.row = row;
2313 /* reset scrolling region */
2314 tsetscroll(0, row-1);
2315 /* make use of the LIMIT in tmoveto */
2316 tmoveto(term.c.x, term.c.y);
2317 /* Clearing both screens */
2318 orig = term.line;
2319 do {
2320 if(mincol < col && 0 < minrow) {
2321 tclearregion(mincol, 0, col - 1, minrow - 1);
2322 }
2323 if(0 < col && minrow < row) {
2324 tclearregion(0, minrow, col - 1, row - 1);
2325 }
2326 tswapscreen();
2327 } while(orig != term.line);
2328
2329 return (slide > 0);
2330 }
2331
2332 void
2333 xresize(int col, int row) {
2334 xw.tw = MAX(1, col * xw.cw);
2335 xw.th = MAX(1, row * xw.ch);
2336
2337 XFreePixmap(xw.dpy, xw.buf);
2338 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2339 DefaultDepth(xw.dpy, xw.scr));
2340 XftDrawChange(xw.draw, xw.buf);
2341 xclear(0, 0, xw.w, xw.h);
2342 }
2343
2344 static inline ushort
2345 sixd_to_16bit(int x) {
2346 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2347 }
2348
2349 void
2350 xloadcols(void) {
2351 int i, r, g, b;
2352 XRenderColor color = { .alpha = 0xffff };
2353
2354 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
2355 for(i = 0; i < LEN(colorname); i++) {
2356 if(!colorname[i])
2357 continue;
2358 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2359 die("Could not allocate color '%s'\n", colorname[i]);
2360 }
2361 }
2362
2363 /* load colors [16-255] ; same colors as xterm */
2364 for(i = 16, r = 0; r < 6; r++) {
2365 for(g = 0; g < 6; g++) {
2366 for(b = 0; b < 6; b++) {
2367 color.red = sixd_to_16bit(r);
2368 color.green = sixd_to_16bit(g);
2369 color.blue = sixd_to_16bit(b);
2370 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i])) {
2371 die("Could not allocate color %d\n", i);
2372 }
2373 i++;
2374 }
2375 }
2376 }
2377
2378 for(r = 0; r < 24; r++, i++) {
2379 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
2380 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color,
2381 &dc.col[i])) {
2382 die("Could not allocate color %d\n", i);
2383 }
2384 }
2385 }
2386
2387 int
2388 xsetcolorname(int x, const char *name) {
2389 XRenderColor color = { .alpha = 0xffff };
2390 Colour colour;
2391 if (x < 0 || x > LEN(colorname))
2392 return -1;
2393 if(!name) {
2394 if(16 <= x && x < 16 + 216) {
2395 int r = (x - 16) / 36, g = ((x - 16) % 36) / 6, b = (x - 16) % 6;
2396 color.red = sixd_to_16bit(r);
2397 color.green = sixd_to_16bit(g);
2398 color.blue = sixd_to_16bit(b);
2399 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2400 return 0; /* something went wrong */
2401 dc.col[x] = colour;
2402 return 1;
2403 } else if (16 + 216 <= x && x < 256) {
2404 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (x - (16 + 216));
2405 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2406 return 0; /* something went wrong */
2407 dc.col[x] = colour;
2408 return 1;
2409 } else {
2410 name = colorname[x];
2411 }
2412 }
2413 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &colour))
2414 return 0;
2415 dc.col[x] = colour;
2416 return 1;
2417 }
2418
2419 void
2420 xtermclear(int col1, int row1, int col2, int row2) {
2421 XftDrawRect(xw.draw,
2422 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2423 borderpx + col1 * xw.cw,
2424 borderpx + row1 * xw.ch,
2425 (col2-col1+1) * xw.cw,
2426 (row2-row1+1) * xw.ch);
2427 }
2428
2429 /*
2430 * Absolute coordinates.
2431 */
2432 void
2433 xclear(int x1, int y1, int x2, int y2) {
2434 XftDrawRect(xw.draw,
2435 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2436 x1, y1, x2-x1, y2-y1);
2437 }
2438
2439 void
2440 xhints(void) {
2441 XClassHint class = {opt_class ? opt_class : termname, termname};
2442 XWMHints wm = {.flags = InputHint, .input = 1};
2443 XSizeHints *sizeh = NULL;
2444
2445 sizeh = XAllocSizeHints();
2446 if(xw.isfixed == False) {
2447 sizeh->flags = PSize | PResizeInc | PBaseSize;
2448 sizeh->height = xw.h;
2449 sizeh->width = xw.w;
2450 sizeh->height_inc = xw.ch;
2451 sizeh->width_inc = xw.cw;
2452 sizeh->base_height = 2 * borderpx;
2453 sizeh->base_width = 2 * borderpx;
2454 } else {
2455 sizeh->flags = PMaxSize | PMinSize;
2456 sizeh->min_width = sizeh->max_width = xw.fw;
2457 sizeh->min_height = sizeh->max_height = xw.fh;
2458 }
2459
2460 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
2461 XFree(sizeh);
2462 }
2463
2464 int
2465 xloadfont(Font *f, FcPattern *pattern) {
2466 FcPattern *match;
2467 FcResult result;
2468
2469 match = FcFontMatch(NULL, pattern, &result);
2470 if(!match)
2471 return 1;
2472
2473 if(!(f->set = FcFontSort(0, match, FcTrue, 0, &result))) {
2474 FcPatternDestroy(match);
2475 return 1;
2476 }
2477
2478 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2479 FcPatternDestroy(match);
2480 return 1;
2481 }
2482
2483 f->pattern = FcPatternDuplicate(pattern);
2484
2485 f->ascent = f->match->ascent;
2486 f->descent = f->match->descent;
2487 f->lbearing = 0;
2488 f->rbearing = f->match->max_advance_width;
2489
2490 f->height = f->ascent + f->descent;
2491 f->width = f->lbearing + f->rbearing;
2492
2493 return 0;
2494 }
2495
2496 void
2497 xloadfonts(char *fontstr, int fontsize) {
2498 FcPattern *pattern;
2499 FcResult result;
2500 double fontval;
2501
2502 if(fontstr[0] == '-') {
2503 pattern = XftXlfdParse(fontstr, False, False);
2504 } else {
2505 pattern = FcNameParse((FcChar8 *)fontstr);
2506 }
2507
2508 if(!pattern)
2509 die("st: can't open font %s\n", fontstr);
2510
2511 if(fontsize > 0) {
2512 FcPatternDel(pattern, FC_PIXEL_SIZE);
2513 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2514 usedfontsize = fontsize;
2515 } else {
2516 result = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2517 if(result == FcResultMatch) {
2518 usedfontsize = (int)fontval;
2519 } else {
2520 /*
2521 * Default font size is 12, if none given. This is to
2522 * have a known usedfontsize value.
2523 */
2524 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
2525 usedfontsize = 12;
2526 }
2527 }
2528
2529 FcConfigSubstitute(0, pattern, FcMatchPattern);
2530 FcDefaultSubstitute(pattern);
2531
2532 if(xloadfont(&dc.font, pattern))
2533 die("st: can't open font %s\n", fontstr);
2534
2535 /* Setting character width and height. */
2536 xw.cw = dc.font.width;
2537 xw.ch = dc.font.height;
2538
2539 FcPatternDel(pattern, FC_SLANT);
2540 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
2541 if(xloadfont(&dc.ifont, pattern))
2542 die("st: can't open font %s\n", fontstr);
2543
2544 FcPatternDel(pattern, FC_WEIGHT);
2545 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
2546 if(xloadfont(&dc.ibfont, pattern))
2547 die("st: can't open font %s\n", fontstr);
2548
2549 FcPatternDel(pattern, FC_SLANT);
2550 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
2551 if(xloadfont(&dc.bfont, pattern))
2552 die("st: can't open font %s\n", fontstr);
2553
2554 FcPatternDestroy(pattern);
2555 }
2556
2557 void
2558 xunloadfonts(void) {
2559 int i, ip;
2560
2561 /*
2562 * Free the loaded fonts in the font cache. This is done backwards
2563 * from the frccur.
2564 */
2565 for(i = 0, ip = frccur; i < frclen; i++, ip--) {
2566 if(ip < 0)
2567 ip = LEN(frc) - 1;
2568 XftFontClose(xw.dpy, frc[ip].font);
2569 }
2570 frccur = -1;
2571 frclen = 0;
2572
2573 XftFontClose(xw.dpy, dc.font.match);
2574 FcPatternDestroy(dc.font.pattern);
2575 FcFontSetDestroy(dc.font.set);
2576 XftFontClose(xw.dpy, dc.bfont.match);
2577 FcPatternDestroy(dc.bfont.pattern);
2578 FcFontSetDestroy(dc.bfont.set);
2579 XftFontClose(xw.dpy, dc.ifont.match);
2580 FcPatternDestroy(dc.ifont.pattern);
2581 FcFontSetDestroy(dc.ifont.set);
2582 XftFontClose(xw.dpy, dc.ibfont.match);
2583 FcPatternDestroy(dc.ibfont.pattern);
2584 FcFontSetDestroy(dc.ibfont.set);
2585 }
2586
2587 void
2588 xzoom(const Arg *arg) {
2589 xunloadfonts();
2590 xloadfonts(usedfont, usedfontsize + arg->i);
2591 cresize(0, 0);
2592 redraw(0);
2593 }
2594
2595 void
2596 xinit(void) {
2597 XSetWindowAttributes attrs;
2598 XGCValues gcvalues;
2599 Cursor cursor;
2600 Window parent;
2601 int sw, sh;
2602
2603 if(!(xw.dpy = XOpenDisplay(NULL)))
2604 die("Can't open display\n");
2605 xw.scr = XDefaultScreen(xw.dpy);
2606 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
2607
2608 /* font */
2609 if(!FcInit())
2610 die("Could not init fontconfig.\n");
2611
2612 usedfont = (opt_font == NULL)? font : opt_font;
2613 xloadfonts(usedfont, 0);
2614
2615 /* colors */
2616 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
2617 xloadcols();
2618
2619 /* adjust fixed window geometry */
2620 if(xw.isfixed) {
2621 sw = DisplayWidth(xw.dpy, xw.scr);
2622 sh = DisplayHeight(xw.dpy, xw.scr);
2623 if(xw.fx < 0)
2624 xw.fx = sw + xw.fx - xw.fw - 1;
2625 if(xw.fy < 0)
2626 xw.fy = sh + xw.fy - xw.fh - 1;
2627
2628 xw.h = xw.fh;
2629 xw.w = xw.fw;
2630 } else {
2631 /* window - default size */
2632 xw.h = 2 * borderpx + term.row * xw.ch;
2633 xw.w = 2 * borderpx + term.col * xw.cw;
2634 xw.fx = 0;
2635 xw.fy = 0;
2636 }
2637
2638 /* Events */
2639 attrs.background_pixel = dc.col[defaultbg].pixel;
2640 attrs.border_pixel = dc.col[defaultbg].pixel;
2641 attrs.bit_gravity = NorthWestGravity;
2642 attrs.event_mask = FocusChangeMask | KeyPressMask
2643 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
2644 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
2645 attrs.colormap = xw.cmap;
2646
2647 parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
2648 XRootWindow(xw.dpy, xw.scr);
2649 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
2650 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
2651 xw.vis,
2652 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
2653 | CWColormap,
2654 &attrs);
2655
2656 memset(&gcvalues, 0, sizeof(gcvalues));
2657 gcvalues.graphics_exposures = False;
2658 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
2659 &gcvalues);
2660 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2661 DefaultDepth(xw.dpy, xw.scr));
2662 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
2663 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
2664
2665 /* Xft rendering context */
2666 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
2667
2668 /* input methods */
2669 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2670 XSetLocaleModifiers("@im=local");
2671 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2672 XSetLocaleModifiers("@im=");
2673 if((xw.xim = XOpenIM(xw.dpy,
2674 NULL, NULL, NULL)) == NULL) {
2675 die("XOpenIM failed. Could not open input"
2676 " device.\n");
2677 }
2678 }
2679 }
2680 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
2681 | XIMStatusNothing, XNClientWindow, xw.win,
2682 XNFocusWindow, xw.win, NULL);
2683 if(xw.xic == NULL)
2684 die("XCreateIC failed. Could not obtain input method.\n");
2685
2686 /* white cursor, black outline */
2687 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
2688 XDefineCursor(xw.dpy, xw.win, cursor);
2689 XRecolorCursor(xw.dpy, cursor,
2690 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
2691 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
2692
2693 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
2694 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
2695 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
2696
2697 xresettitle();
2698 XMapWindow(xw.dpy, xw.win);
2699 xhints();
2700 XSync(xw.dpy, 0);
2701 }
2702
2703 void
2704 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
2705 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
2706 width = charlen * xw.cw, xp, i;
2707 int frp, frcflags;
2708 int u8fl, u8fblen, u8cblen, doesexist;
2709 char *u8c, *u8fs;
2710 long u8char;
2711 Font *font = &dc.font;
2712 FcResult fcres;
2713 FcPattern *fcpattern, *fontpattern;
2714 FcFontSet *fcsets[] = { NULL };
2715 FcCharSet *fccharset;
2716 Colour *fg, *bg, *temp, revfg, revbg;
2717 XRenderColor colfg, colbg;
2718
2719 frcflags = FRC_NORMAL;
2720
2721 if(base.mode & ATTR_ITALIC) {
2722 if(base.fg == defaultfg)
2723 base.fg = defaultitalic;
2724 font = &dc.ifont;
2725 frcflags = FRC_ITALIC;
2726 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
2727 if(base.fg == defaultfg)
2728 base.fg = defaultitalic;
2729 font = &dc.ibfont;
2730 frcflags = FRC_ITALICBOLD;
2731 } else if(base.mode & ATTR_UNDERLINE) {
2732 if(base.fg == defaultfg)
2733 base.fg = defaultunderline;
2734 }
2735 fg = &dc.col[base.fg];
2736 bg = &dc.col[base.bg];
2737
2738 if(base.mode & ATTR_BOLD) {
2739 if(BETWEEN(base.fg, 0, 7)) {
2740 /* basic system colors */
2741 fg = &dc.col[base.fg + 8];
2742 } else if(BETWEEN(base.fg, 16, 195)) {
2743 /* 256 colors */
2744 fg = &dc.col[base.fg + 36];
2745 } else if(BETWEEN(base.fg, 232, 251)) {
2746 /* greyscale */
2747 fg = &dc.col[base.fg + 4];
2748 }
2749 /*
2750 * Those ranges will not be brightened:
2751 * 8 - 15 – bright system colors
2752 * 196 - 231 – highest 256 color cube
2753 * 252 - 255 – brightest colors in greyscale
2754 */
2755 font = &dc.bfont;
2756 frcflags = FRC_BOLD;
2757 }
2758
2759 if(IS_SET(MODE_REVERSE)) {
2760 if(fg == &dc.col[defaultfg]) {
2761 fg = &dc.col[defaultbg];
2762 } else {
2763 colfg.red = ~fg->color.red;
2764 colfg.green = ~fg->color.green;
2765 colfg.blue = ~fg->color.blue;
2766 colfg.alpha = fg->color.alpha;
2767 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
2768 fg = &revfg;
2769 }
2770
2771 if(bg == &dc.col[defaultbg]) {
2772 bg = &dc.col[defaultfg];
2773 } else {
2774 colbg.red = ~bg->color.red;
2775 colbg.green = ~bg->color.green;
2776 colbg.blue = ~bg->color.blue;
2777 colbg.alpha = bg->color.alpha;
2778 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &revbg);
2779 bg = &revbg;
2780 }
2781 }
2782
2783 if(base.mode & ATTR_REVERSE) {
2784 temp = fg;
2785 fg = bg;
2786 bg = temp;
2787 }
2788
2789 /* Intelligent cleaning up of the borders. */
2790 if(x == 0) {
2791 xclear(0, (y == 0)? 0 : winy, borderpx,
2792 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
2793 }
2794 if(x + charlen >= term.col) {
2795 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
2796 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
2797 }
2798 if(y == 0)
2799 xclear(winx, 0, winx + width, borderpx);
2800 if(y == term.row-1)
2801 xclear(winx, winy + xw.ch, winx + width, xw.h);
2802
2803 /* Clean up the region we want to draw to. */
2804 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
2805
2806 fcsets[0] = font->set;
2807 for(xp = winx; bytelen > 0;) {
2808 /*
2809 * Search for the range in the to be printed string of glyphs
2810 * that are in the main font. Then print that range. If
2811 * some glyph is found that is not in the font, do the
2812 * fallback dance.
2813 */
2814 u8fs = s;
2815 u8fblen = 0;
2816 u8fl = 0;
2817 for(;;) {
2818 u8c = s;
2819 u8cblen = utf8decode(s, &u8char);
2820 s += u8cblen;
2821 bytelen -= u8cblen;
2822
2823 doesexist = XftCharIndex(xw.dpy, font->match, u8char);
2824 if(!doesexist || bytelen <= 0) {
2825 if(bytelen <= 0) {
2826 if(doesexist) {
2827 u8fl++;
2828 u8fblen += u8cblen;
2829 }
2830 }
2831
2832 if(u8fl > 0) {
2833 XftDrawStringUtf8(xw.draw, fg,
2834 font->match, xp,
2835 winy + font->ascent,
2836 (FcChar8 *)u8fs,
2837 u8fblen);
2838 xp += font->width * u8fl;
2839 }
2840 break;
2841 }
2842
2843 u8fl++;
2844 u8fblen += u8cblen;
2845 }
2846 if(doesexist)
2847 break;
2848
2849 frp = frccur;
2850 /* Search the font cache. */
2851 for(i = 0; i < frclen; i++, frp--) {
2852 if(frp <= 0)
2853 frp = LEN(frc) - 1;
2854
2855 if(frc[frp].c == u8char
2856 && frc[frp].flags == frcflags) {
2857 break;
2858 }
2859 }
2860
2861 /* Nothing was found. */
2862 if(i >= frclen) {
2863 /*
2864 * Nothing was found in the cache. Now use
2865 * some dozen of Fontconfig calls to get the
2866 * font for one single character.
2867 */
2868 fcpattern = FcPatternDuplicate(font->pattern);
2869 fccharset = FcCharSetCreate();
2870
2871 FcCharSetAddChar(fccharset, u8char);
2872 FcPatternAddCharSet(fcpattern, FC_CHARSET,
2873 fccharset);
2874 FcPatternAddBool(fcpattern, FC_SCALABLE,
2875 FcTrue);
2876
2877 FcConfigSubstitute(0, fcpattern,
2878 FcMatchPattern);
2879 FcDefaultSubstitute(fcpattern);
2880
2881 fontpattern = FcFontSetMatch(0, fcsets,
2882 FcTrue, fcpattern, &fcres);
2883
2884 /*
2885 * Overwrite or create the new cache entry.
2886 */
2887 frccur++;
2888 frclen++;
2889 if(frccur >= LEN(frc))
2890 frccur = 0;
2891 if(frclen > LEN(frc)) {
2892 frclen = LEN(frc);
2893 XftFontClose(xw.dpy, frc[frccur].font);
2894 }
2895
2896 frc[frccur].font = XftFontOpenPattern(xw.dpy,
2897 fontpattern);
2898 frc[frccur].c = u8char;
2899 frc[frccur].flags = frcflags;
2900
2901 FcPatternDestroy(fcpattern);
2902 FcCharSetDestroy(fccharset);
2903
2904 frp = frccur;
2905 }
2906
2907 XftDrawStringUtf8(xw.draw, fg, frc[frp].font,
2908 xp, winy + frc[frp].font->ascent,
2909 (FcChar8 *)u8c, u8cblen);
2910
2911 xp += font->width;
2912 }
2913
2914 /*
2915 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
2916 winy + font->ascent, (FcChar8 *)s, bytelen);
2917 */
2918
2919 if(base.mode & ATTR_UNDERLINE) {
2920 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
2921 width, 1);
2922 }
2923 }
2924
2925 void
2926 xdrawcursor(void) {
2927 static int oldx = 0, oldy = 0;
2928 int sl;
2929 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
2930
2931 LIMIT(oldx, 0, term.col-1);
2932 LIMIT(oldy, 0, term.row-1);
2933
2934 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
2935
2936 /* remove the old cursor */
2937 sl = utf8size(term.line[oldy][oldx].c);
2938 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
2939 oldy, 1, sl);
2940
2941 /* draw the new one */
2942 if(!(IS_SET(MODE_HIDE))) {
2943 if(xw.state & WIN_FOCUSED) {
2944 if(IS_SET(MODE_REVERSE)) {
2945 g.mode |= ATTR_REVERSE;
2946 g.fg = defaultcs;
2947 g.bg = defaultfg;
2948 }
2949
2950 sl = utf8size(g.c);
2951 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
2952 } else {
2953 XftDrawRect(xw.draw, &dc.col[defaultcs],
2954 borderpx + term.c.x * xw.cw,
2955 borderpx + term.c.y * xw.ch,
2956 xw.cw - 1, 1);
2957 XftDrawRect(xw.draw, &dc.col[defaultcs],
2958 borderpx + term.c.x * xw.cw,
2959 borderpx + term.c.y * xw.ch,
2960 1, xw.ch - 1);
2961 XftDrawRect(xw.draw, &dc.col[defaultcs],
2962 borderpx + (term.c.x + 1) * xw.cw - 1,
2963 borderpx + term.c.y * xw.ch,
2964 1, xw.ch - 1);
2965 XftDrawRect(xw.draw, &dc.col[defaultcs],
2966 borderpx + term.c.x * xw.cw,
2967 borderpx + (term.c.y + 1) * xw.ch - 1,
2968 xw.cw, 1);
2969 }
2970 oldx = term.c.x, oldy = term.c.y;
2971 }
2972 }
2973
2974
2975 void
2976 xsettitle(char *p) {
2977 XTextProperty prop;
2978
2979 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
2980 &prop);
2981 XSetWMName(xw.dpy, xw.win, &prop);
2982 }
2983
2984 void
2985 xresettitle(void) {
2986 xsettitle(opt_title ? opt_title : "st");
2987 }
2988
2989 void
2990 redraw(int timeout) {
2991 struct timespec tv = {0, timeout * 1000};
2992
2993 tfulldirt();
2994 draw();
2995
2996 if(timeout > 0) {
2997 nanosleep(&tv, NULL);
2998 XSync(xw.dpy, False); /* necessary for a good tput flash */
2999 }
3000 }
3001
3002 void
3003 draw(void) {
3004 drawregion(0, 0, term.col, term.row);
3005 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3006 xw.h, 0, 0);
3007 XSetForeground(xw.dpy, dc.gc,
3008 dc.col[IS_SET(MODE_REVERSE)?
3009 defaultfg : defaultbg].pixel);
3010 }
3011
3012 void
3013 drawregion(int x1, int y1, int x2, int y2) {
3014 int ic, ib, x, y, ox, sl;
3015 Glyph base, new;
3016 char buf[DRAW_BUF_SIZ];
3017 bool ena_sel = sel.bx != -1;
3018
3019 if(sel.alt ^ IS_SET(MODE_ALTSCREEN))
3020 ena_sel = 0;
3021
3022 if(!(xw.state & WIN_VISIBLE))
3023 return;
3024
3025 for(y = y1; y < y2; y++) {
3026 if(!term.dirty[y])
3027 continue;
3028
3029 xtermclear(0, y, term.col, y);
3030 term.dirty[y] = 0;
3031 base = term.line[y][0];
3032 ic = ib = ox = 0;
3033 for(x = x1; x < x2; x++) {
3034 new = term.line[y][x];
3035 if(ena_sel && *(new.c) && selected(x, y))
3036 new.mode ^= ATTR_REVERSE;
3037 if(ib > 0 && (ATTRCMP(base, new)
3038 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3039 xdraws(buf, base, ox, y, ic, ib);
3040 ic = ib = 0;
3041 }
3042 if(ib == 0) {
3043 ox = x;
3044 base = new;
3045 }
3046
3047 sl = utf8size(new.c);
3048 memcpy(buf+ib, new.c, sl);
3049 ib += sl;
3050 ++ic;
3051 }
3052 if(ib > 0)
3053 xdraws(buf, base, ox, y, ic, ib);
3054 }
3055 xdrawcursor();
3056 }
3057
3058 void
3059 expose(XEvent *ev) {
3060 XExposeEvent *e = &ev->xexpose;
3061
3062 if(xw.state & WIN_REDRAW) {
3063 if(!e->count)
3064 xw.state &= ~WIN_REDRAW;
3065 }
3066 redraw(0);
3067 }
3068
3069 void
3070 visibility(XEvent *ev) {
3071 XVisibilityEvent *e = &ev->xvisibility;
3072
3073 if(e->state == VisibilityFullyObscured) {
3074 xw.state &= ~WIN_VISIBLE;
3075 } else if(!(xw.state & WIN_VISIBLE)) {
3076 /* need a full redraw for next Expose, not just a buf copy */
3077 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3078 }
3079 }
3080
3081 void
3082 unmap(XEvent *ev) {
3083 xw.state &= ~WIN_VISIBLE;
3084 }
3085
3086 void
3087 xseturgency(int add) {
3088 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3089
3090 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
3091 XSetWMHints(xw.dpy, xw.win, h);
3092 XFree(h);
3093 }
3094
3095 void
3096 focus(XEvent *ev) {
3097 XFocusChangeEvent *e = &ev->xfocus;
3098
3099 if(e->mode == NotifyGrab)
3100 return;
3101
3102 if(ev->type == FocusIn) {
3103 XSetICFocus(xw.xic);
3104 xw.state |= WIN_FOCUSED;
3105 xseturgency(0);
3106 } else {
3107 XUnsetICFocus(xw.xic);
3108 xw.state &= ~WIN_FOCUSED;
3109 }
3110 }
3111
3112 inline bool
3113 match(uint mask, uint state) {
3114 state &= ~(ignoremod);
3115
3116 if(mask == XK_NO_MOD && state)
3117 return false;
3118 if(mask != XK_ANY_MOD && mask != XK_NO_MOD && !state)
3119 return false;
3120 if((state & mask) != state)
3121 return false;
3122 return true;
3123 }
3124
3125 void
3126 numlock(const Arg *dummy) {
3127 term.numlock ^= 1;
3128 }
3129
3130 char*
3131 kmap(KeySym k, uint state) {
3132 uint mask;
3133 Key *kp;
3134 int i;
3135
3136 /* Check for mapped keys out of X11 function keys. */
3137 for(i = 0; i < LEN(mappedkeys); i++) {
3138 if(mappedkeys[i] == k)
3139 break;
3140 }
3141 if(i == LEN(mappedkeys)) {
3142 if((k & 0xFFFF) < 0xFD00)
3143 return NULL;
3144 }
3145
3146 for(kp = key; kp < key + LEN(key); kp++) {
3147 mask = kp->mask;
3148
3149 if(kp->k != k)
3150 continue;
3151
3152 if(!match(mask, state))
3153 continue;
3154
3155 if(kp->appkey > 0) {
3156 if(!IS_SET(MODE_APPKEYPAD))
3157 continue;
3158 if(term.numlock && kp->appkey == 2)
3159 continue;
3160 } else if(kp->appkey < 0 && IS_SET(MODE_APPKEYPAD)) {
3161 continue;
3162 }
3163
3164 if((kp->appcursor < 0 && IS_SET(MODE_APPCURSOR)) ||
3165 (kp->appcursor > 0
3166 && !IS_SET(MODE_APPCURSOR))) {
3167 continue;
3168 }
3169
3170 if((kp->crlf < 0 && IS_SET(MODE_CRLF)) ||
3171 (kp->crlf > 0 && !IS_SET(MODE_CRLF))) {
3172 continue;
3173 }
3174
3175 return kp->s;
3176 }
3177
3178 return NULL;
3179 }
3180
3181 void
3182 kpress(XEvent *ev) {
3183 XKeyEvent *e = &ev->xkey;
3184 KeySym ksym;
3185 char xstr[31], buf[32], *customkey, *cp = buf;
3186 int len;
3187 Status status;
3188 Shortcut *bp;
3189
3190 if(IS_SET(MODE_KBDLOCK))
3191 return;
3192
3193 len = XmbLookupString(xw.xic, e, xstr, sizeof(xstr), &ksym, &status);
3194 e->state &= ~Mod2Mask;
3195 /* 1. shortcuts */
3196 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3197 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3198 bp->func(&(bp->arg));
3199 return;
3200 }
3201 }
3202
3203 /* 2. custom keys from config.h */
3204 if((customkey = kmap(ksym, e->state))) {
3205 len = strlen(customkey);
3206 memcpy(buf, customkey, len);
3207 /* 2. hardcoded (overrides X lookup) */
3208 } else {
3209 if(len == 0)
3210 return;
3211
3212 if(len == 1 && e->state & Mod1Mask)
3213 *cp++ = '\033';
3214
3215 memcpy(cp, xstr, len);
3216 len = cp - buf + len;
3217 }
3218
3219 ttywrite(buf, len);
3220 if(IS_SET(MODE_ECHO))
3221 techo(buf, len);
3222 }
3223
3224
3225 void
3226 cmessage(XEvent *e) {
3227 /*
3228 * See xembed specs
3229 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3230 */
3231 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3232 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3233 xw.state |= WIN_FOCUSED;
3234 xseturgency(0);
3235 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3236 xw.state &= ~WIN_FOCUSED;
3237 }
3238 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3239 /* Send SIGHUP to shell */
3240 kill(pid, SIGHUP);
3241 exit(EXIT_SUCCESS);
3242 }
3243 }
3244
3245 void
3246 cresize(int width, int height) {
3247 int col, row;
3248
3249 if(width != 0)
3250 xw.w = width;
3251 if(height != 0)
3252 xw.h = height;
3253
3254 col = (xw.w - 2 * borderpx) / xw.cw;
3255 row = (xw.h - 2 * borderpx) / xw.ch;
3256
3257 tresize(col, row);
3258 xresize(col, row);
3259 ttyresize();
3260 }
3261
3262 void
3263 resize(XEvent *e) {
3264 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3265 return;
3266
3267 cresize(e->xconfigure.width, e->xconfigure.height);
3268 }
3269
3270 void
3271 run(void) {
3272 XEvent ev;
3273 fd_set rfd;
3274 int xfd = XConnectionNumber(xw.dpy), xev;
3275 struct timeval drawtimeout, *tv = NULL, now, last;
3276
3277 gettimeofday(&last, NULL);
3278
3279 for(xev = actionfps;;) {
3280 FD_ZERO(&rfd);
3281 FD_SET(cmdfd, &rfd);
3282 FD_SET(xfd, &rfd);
3283 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
3284 if(errno == EINTR)
3285 continue;
3286 die("select failed: %s\n", SERRNO);
3287 }
3288
3289 gettimeofday(&now, NULL);
3290 drawtimeout.tv_sec = 0;
3291 drawtimeout.tv_usec = (1000/xfps) * 1000;
3292 tv = &drawtimeout;
3293
3294 if(FD_ISSET(cmdfd, &rfd))
3295 ttyread();
3296
3297 if(FD_ISSET(xfd, &rfd))
3298 xev = actionfps;
3299
3300 if(TIMEDIFF(now, last) > \
3301 (xev ? (1000/xfps) : (1000/actionfps))) {
3302 while(XPending(xw.dpy)) {
3303 XNextEvent(xw.dpy, &ev);
3304 if(XFilterEvent(&ev, None))
3305 continue;
3306 if(handler[ev.type])
3307 (handler[ev.type])(&ev);
3308 }
3309
3310 draw();
3311 XFlush(xw.dpy);
3312 last = now;
3313
3314 if(xev && !FD_ISSET(xfd, &rfd))
3315 xev--;
3316 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd))
3317 tv = NULL;
3318 }
3319 }
3320 }
3321
3322 void
3323 usage(void) {
3324 die("%s " VERSION " (c) 2010-2013 st engineers\n" \
3325 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]" \
3326 " [-t title] [-w windowid] [-e command ...]\n", argv0);
3327 }
3328
3329 int
3330 main(int argc, char *argv[]) {
3331 int bitm, xr, yr;
3332 uint wr, hr;
3333
3334 xw.fw = xw.fh = xw.fx = xw.fy = 0;
3335 xw.isfixed = False;
3336
3337 ARGBEGIN {
3338 case 'a':
3339 allowaltscreen = false;
3340 break;
3341 case 'c':
3342 opt_class = EARGF(usage());
3343 break;
3344 case 'e':
3345 /* eat all remaining arguments */
3346 if(argc > 1)
3347 opt_cmd = &argv[1];
3348 goto run;
3349 case 'f':
3350 opt_font = EARGF(usage());
3351 break;
3352 case 'g':
3353 bitm = XParseGeometry(EARGF(usage()), &xr, &yr, &wr, &hr);
3354 if(bitm & XValue)
3355 xw.fx = xr;
3356 if(bitm & YValue)
3357 xw.fy = yr;
3358 if(bitm & WidthValue)
3359 xw.fw = (int)wr;
3360 if(bitm & HeightValue)
3361 xw.fh = (int)hr;
3362 if(bitm & XNegative && xw.fx == 0)
3363 xw.fx = -1;
3364 if(bitm & XNegative && xw.fy == 0)
3365 xw.fy = -1;
3366
3367 if(xw.fh != 0 && xw.fw != 0)
3368 xw.isfixed = True;
3369 break;
3370 case 'o':
3371 opt_io = EARGF(usage());
3372 break;
3373 case 't':
3374 opt_title = EARGF(usage());
3375 break;
3376 case 'w':
3377 opt_embed = EARGF(usage());
3378 break;
3379 case 'v':
3380 default:
3381 usage();
3382 } ARGEND;
3383
3384 run:
3385 setlocale(LC_CTYPE, "");
3386 XSetLocaleModifiers("");
3387 tnew(80, 24);
3388 xinit();
3389 ttynew();
3390 selinit();
3391 if(xw.isfixed)
3392 cresize(xw.h, xw.w);
3393 run();
3394
3395 return 0;
3396 }
3397