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Very minor grammar fixes in FAQ
[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 <stdint.h>
15 #include <sys/ioctl.h>
16 #include <sys/select.h>
17 #include <sys/stat.h>
18 #include <sys/time.h>
19 #include <sys/types.h>
20 #include <sys/wait.h>
21 #include <time.h>
22 #include <unistd.h>
23 #include <libgen.h>
24 #include <X11/Xatom.h>
25 #include <X11/Xlib.h>
26 #include <X11/Xutil.h>
27 #include <X11/cursorfont.h>
28 #include <X11/keysym.h>
29 #include <X11/Xft/Xft.h>
30 #include <fontconfig/fontconfig.h>
31 #include <wchar.h>
32
33 #include "arg.h"
34
35 char *argv0;
36
37 #define Glyph Glyph_
38 #define Font Font_
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_INVALID 0xFFFD
55 #define UTF_SIZ 4
56 #define ESC_BUF_SIZ (128*UTF_SIZ)
57 #define ESC_ARG_SIZ 16
58 #define STR_BUF_SIZ ESC_BUF_SIZ
59 #define STR_ARG_SIZ ESC_ARG_SIZ
60 #define DRAW_BUF_SIZ 20*1024
61 #define XK_ANY_MOD UINT_MAX
62 #define XK_NO_MOD 0
63 #define XK_SWITCH_MOD (1<<13)
64
65 #define REDRAW_TIMEOUT (80*1000) /* 80 ms */
66
67 /* macros */
68 #define 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 ISCONTROLC0(c) (BETWEEN(c, 0, 0x1f))
74 #define ISCONTROLC1(c) (BETWEEN(c, 0x80, 0x9f))
75 #define ISCONTROL(c) (ISCONTROLC0(c) || ISCONTROLC1(c))
76 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
77 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
78 #define IS_SET(flag) ((term.mode & (flag)) != 0)
79 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_nsec-t2.tv_nsec)/1E6)
80 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
81
82 #define TRUECOLOR(r,g,b) (1 << 24 | (r) << 16 | (g) << 8 | (b))
83 #define IS_TRUECOL(x) (1 << 24 & (x))
84 #define TRUERED(x) (((x) & 0xff0000) >> 8)
85 #define TRUEGREEN(x) (((x) & 0xff00))
86 #define TRUEBLUE(x) (((x) & 0xff) << 8)
87
88
89 #define VT102ID "\033[?6c"
90
91 enum glyph_attribute {
92 ATTR_NULL = 0,
93 ATTR_BOLD = 1,
94 ATTR_FAINT = 2,
95 ATTR_ITALIC = 4,
96 ATTR_UNDERLINE = 8,
97 ATTR_BLINK = 16,
98 ATTR_FASTBLINK = 32,
99 ATTR_REVERSE = 64,
100 ATTR_INVISIBLE = 128,
101 ATTR_STRUCK = 256,
102 ATTR_WRAP = 512,
103 ATTR_WIDE = 1024,
104 ATTR_WDUMMY = 2048,
105 };
106
107 enum cursor_movement {
108 CURSOR_SAVE,
109 CURSOR_LOAD
110 };
111
112 enum cursor_state {
113 CURSOR_DEFAULT = 0,
114 CURSOR_WRAPNEXT = 1,
115 CURSOR_ORIGIN = 2
116 };
117
118 enum term_mode {
119 MODE_WRAP = 1,
120 MODE_INSERT = 2,
121 MODE_APPKEYPAD = 4,
122 MODE_ALTSCREEN = 8,
123 MODE_CRLF = 16,
124 MODE_MOUSEBTN = 32,
125 MODE_MOUSEMOTION = 64,
126 MODE_REVERSE = 128,
127 MODE_KBDLOCK = 256,
128 MODE_HIDE = 512,
129 MODE_ECHO = 1024,
130 MODE_APPCURSOR = 2048,
131 MODE_MOUSESGR = 4096,
132 MODE_8BIT = 8192,
133 MODE_BLINK = 16384,
134 MODE_FBLINK = 32768,
135 MODE_FOCUS = 65536,
136 MODE_MOUSEX10 = 131072,
137 MODE_MOUSEMANY = 262144,
138 MODE_BRCKTPASTE = 524288,
139 MODE_PRINT = 1048576,
140 MODE_MOUSE = MODE_MOUSEBTN|MODE_MOUSEMOTION|MODE_MOUSEX10\
141 |MODE_MOUSEMANY,
142 };
143
144 enum charset {
145 CS_GRAPHIC0,
146 CS_GRAPHIC1,
147 CS_UK,
148 CS_USA,
149 CS_MULTI,
150 CS_GER,
151 CS_FIN
152 };
153
154 enum escape_state {
155 ESC_START = 1,
156 ESC_CSI = 2,
157 ESC_STR = 4, /* DCS, OSC, PM, APC */
158 ESC_ALTCHARSET = 8,
159 ESC_STR_END = 16, /* a final string was encountered */
160 ESC_TEST = 32, /* Enter in test mode */
161 };
162
163 enum window_state {
164 WIN_VISIBLE = 1,
165 WIN_REDRAW = 2,
166 WIN_FOCUSED = 4
167 };
168
169 enum selection_type {
170 SEL_REGULAR = 1,
171 SEL_RECTANGULAR = 2
172 };
173
174 enum selection_snap {
175 SNAP_WORD = 1,
176 SNAP_LINE = 2
177 };
178
179 typedef unsigned char uchar;
180 typedef unsigned int uint;
181 typedef unsigned long ulong;
182 typedef unsigned short ushort;
183
184 typedef XftDraw *Draw;
185 typedef XftColor Color;
186
187 typedef struct {
188 char c[UTF_SIZ]; /* character code */
189 ushort mode; /* attribute flags */
190 uint32_t fg; /* foreground */
191 uint32_t bg; /* background */
192 } Glyph;
193
194 typedef Glyph *Line;
195
196 typedef struct {
197 Glyph attr; /* current char attributes */
198 int x;
199 int y;
200 char state;
201 } TCursor;
202
203 /* CSI Escape sequence structs */
204 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
205 typedef struct {
206 char buf[ESC_BUF_SIZ]; /* raw string */
207 int len; /* raw string length */
208 char priv;
209 int arg[ESC_ARG_SIZ];
210 int narg; /* nb of args */
211 char mode;
212 } CSIEscape;
213
214 /* STR Escape sequence structs */
215 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
216 typedef struct {
217 char type; /* ESC type ... */
218 char buf[STR_BUF_SIZ]; /* raw string */
219 int len; /* raw string length */
220 char *args[STR_ARG_SIZ];
221 int narg; /* nb of args */
222 } STREscape;
223
224 /* Internal representation of the screen */
225 typedef struct {
226 int row; /* nb row */
227 int col; /* nb col */
228 Line *line; /* screen */
229 Line *alt; /* alternate screen */
230 bool *dirty; /* dirtyness of lines */
231 TCursor c; /* cursor */
232 int top; /* top scroll limit */
233 int bot; /* bottom scroll limit */
234 int mode; /* terminal mode flags */
235 int esc; /* escape state flags */
236 char trantbl[4]; /* charset table translation */
237 int charset; /* current charset */
238 int icharset; /* selected charset for sequence */
239 bool numlock; /* lock numbers in keyboard */
240 bool *tabs;
241 } Term;
242
243 /* Purely graphic info */
244 typedef struct {
245 Display *dpy;
246 Colormap cmap;
247 Window win;
248 Drawable buf;
249 Atom xembed, wmdeletewin, netwmname, netwmpid;
250 XIM xim;
251 XIC xic;
252 Draw draw;
253 Visual *vis;
254 XSetWindowAttributes attrs;
255 int scr;
256 bool isfixed; /* is fixed geometry? */
257 int l, t; /* left and top offset */
258 int gm; /* geometry mask */
259 int tw, th; /* tty width and height */
260 int w, h; /* window width and height */
261 int ch; /* char height */
262 int cw; /* char width */
263 char state; /* focus, redraw, visible */
264 } XWindow;
265
266 typedef struct {
267 uint b;
268 uint mask;
269 char *s;
270 } Mousekey;
271
272 typedef struct {
273 KeySym k;
274 uint mask;
275 char *s;
276 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
277 signed char appkey; /* application keypad */
278 signed char appcursor; /* application cursor */
279 signed char crlf; /* crlf mode */
280 } Key;
281
282 typedef struct {
283 int mode;
284 int type;
285 int snap;
286 /*
287 * Selection variables:
288 * nb – normalized coordinates of the beginning of the selection
289 * ne – normalized coordinates of the end of the selection
290 * ob – original coordinates of the beginning of the selection
291 * oe – original coordinates of the end of the selection
292 */
293 struct {
294 int x, y;
295 } nb, ne, ob, oe;
296
297 char *clip;
298 Atom xtarget;
299 bool alt;
300 struct timespec tclick1;
301 struct timespec tclick2;
302 } Selection;
303
304 typedef union {
305 int i;
306 uint ui;
307 float f;
308 const void *v;
309 } Arg;
310
311 typedef struct {
312 uint mod;
313 KeySym keysym;
314 void (*func)(const Arg *);
315 const Arg arg;
316 } Shortcut;
317
318 /* function definitions used in config.h */
319 static void clippaste(const Arg *);
320 static void numlock(const Arg *);
321 static void selpaste(const Arg *);
322 static void xzoom(const Arg *);
323 static void printsel(const Arg *);
324 static void printscreen(const Arg *) ;
325 static void toggleprinter(const Arg *);
326
327 /* Config.h for applying patches and the configuration. */
328 #include "config.h"
329
330 /* Font structure */
331 typedef struct {
332 int height;
333 int width;
334 int ascent;
335 int descent;
336 short lbearing;
337 short rbearing;
338 XftFont *match;
339 FcFontSet *set;
340 FcPattern *pattern;
341 } Font;
342
343 /* Drawing Context */
344 typedef struct {
345 Color col[MAX(LEN(colorname), 256)];
346 Font font, bfont, ifont, ibfont;
347 GC gc;
348 } DC;
349
350 static void die(const char *, ...);
351 static void draw(void);
352 static void redraw(int);
353 static void drawregion(int, int, int, int);
354 static void execsh(void);
355 static void sigchld(int);
356 static void run(void);
357
358 static void csidump(void);
359 static void csihandle(void);
360 static void csiparse(void);
361 static void csireset(void);
362 static void strdump(void);
363 static void strhandle(void);
364 static void strparse(void);
365 static void strreset(void);
366
367 static int tattrset(int);
368 static void tprinter(char *, size_t);
369 static void tdumpsel(void);
370 static void tdumpline(int);
371 static void tdump(void);
372 static void tclearregion(int, int, int, int);
373 static void tcursor(int);
374 static void tdeletechar(int);
375 static void tdeleteline(int);
376 static void tinsertblank(int);
377 static void tinsertblankline(int);
378 static int tlinelen(int);
379 static void tmoveto(int, int);
380 static void tmoveato(int, int);
381 static void tnew(int, int);
382 static void tnewline(int);
383 static void tputtab(int);
384 static void tputc(char *, int);
385 static void treset(void);
386 static int tresize(int, int);
387 static void tscrollup(int, int);
388 static void tscrolldown(int, int);
389 static void tsetattr(int *, int);
390 static void tsetchar(char *, Glyph *, int, int);
391 static void tsetscroll(int, int);
392 static void tswapscreen(void);
393 static void tsetdirt(int, int);
394 static void tsetdirtattr(int);
395 static void tsetmode(bool, bool, int *, int);
396 static void tfulldirt(void);
397 static void techo(char *, int);
398 static void tcontrolcode(uchar );
399 static void tdectest(char );
400 static int32_t tdefcolor(int *, int *, int);
401 static void tdeftran(char);
402 static inline bool match(uint, uint);
403 static void ttynew(void);
404 static void ttyread(void);
405 static void ttyresize(void);
406 static void ttysend(char *, size_t);
407 static void ttywrite(const char *, size_t);
408 static void tstrsequence(uchar c);
409
410 static void xdraws(char *, Glyph, int, int, int, int);
411 static void xhints(void);
412 static void xclear(int, int, int, int);
413 static void xdrawcursor(void);
414 static void xinit(void);
415 static void xloadcols(void);
416 static int xsetcolorname(int, const char *);
417 static int xgeommasktogravity(int);
418 static int xloadfont(Font *, FcPattern *);
419 static void xloadfonts(char *, double);
420 static int xloadfontset(Font *);
421 static void xsettitle(char *);
422 static void xresettitle(void);
423 static void xsetpointermotion(int);
424 static void xseturgency(int);
425 static void xsetsel(char *);
426 static void xtermclear(int, int, int, int);
427 static void xunloadfont(Font *);
428 static void xunloadfonts(void);
429 static void xresize(int, int);
430
431 static void expose(XEvent *);
432 static void visibility(XEvent *);
433 static void unmap(XEvent *);
434 static char *kmap(KeySym, uint);
435 static void kpress(XEvent *);
436 static void cmessage(XEvent *);
437 static void cresize(int, int);
438 static void resize(XEvent *);
439 static void focus(XEvent *);
440 static void brelease(XEvent *);
441 static void bpress(XEvent *);
442 static void bmotion(XEvent *);
443 static void selnotify(XEvent *);
444 static void selclear(XEvent *);
445 static void selrequest(XEvent *);
446
447 static void selinit(void);
448 static void selnormalize(void);
449 static inline bool selected(int, int);
450 static char *getsel(void);
451 static void selcopy(void);
452 static void selscroll(int, int);
453 static void selsnap(int, int *, int *, int);
454 static void getbuttoninfo(XEvent *);
455 static void mousereport(XEvent *);
456
457 static size_t utf8decode(char *, long *, size_t);
458 static long utf8decodebyte(char, size_t *);
459 static size_t utf8encode(long, char *, size_t);
460 static char utf8encodebyte(long, size_t);
461 static size_t utf8len(char *);
462 static size_t utf8validate(long *, size_t);
463
464 static ssize_t xwrite(int, const char *, size_t);
465 static void *xmalloc(size_t);
466 static void *xrealloc(void *, size_t);
467 static char *xstrdup(char *);
468
469 static void usage(void);
470
471 static void (*handler[LASTEvent])(XEvent *) = {
472 [KeyPress] = kpress,
473 [ClientMessage] = cmessage,
474 [ConfigureNotify] = resize,
475 [VisibilityNotify] = visibility,
476 [UnmapNotify] = unmap,
477 [Expose] = expose,
478 [FocusIn] = focus,
479 [FocusOut] = focus,
480 [MotionNotify] = bmotion,
481 [ButtonPress] = bpress,
482 [ButtonRelease] = brelease,
483 [SelectionClear] = selclear,
484 [SelectionNotify] = selnotify,
485 [SelectionRequest] = selrequest,
486 };
487
488 /* Globals */
489 static DC dc;
490 static XWindow xw;
491 static Term term;
492 static CSIEscape csiescseq;
493 static STREscape strescseq;
494 static int cmdfd;
495 static pid_t pid;
496 static Selection sel;
497 static int iofd = STDOUT_FILENO;
498 static char **opt_cmd = NULL;
499 static char *opt_io = NULL;
500 static char *opt_title = NULL;
501 static char *opt_embed = NULL;
502 static char *opt_class = NULL;
503 static char *opt_font = NULL;
504 static int oldbutton = 3; /* button event on startup: 3 = release */
505
506 static char *usedfont = NULL;
507 static double usedfontsize = 0;
508
509 static uchar utfbyte[UTF_SIZ + 1] = {0x80, 0, 0xC0, 0xE0, 0xF0};
510 static uchar utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
511 static long utfmin[UTF_SIZ + 1] = { 0, 0, 0x80, 0x800, 0x10000};
512 static long utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
513
514 /* Font Ring Cache */
515 enum {
516 FRC_NORMAL,
517 FRC_ITALIC,
518 FRC_BOLD,
519 FRC_ITALICBOLD
520 };
521
522 typedef struct {
523 XftFont *font;
524 int flags;
525 } Fontcache;
526
527 /* Fontcache is an array now. A new font will be appended to the array. */
528 static Fontcache frc[16];
529 static int frclen = 0;
530
531 ssize_t
532 xwrite(int fd, const char *s, size_t len) {
533 size_t aux = len;
534
535 while(len > 0) {
536 ssize_t r = write(fd, s, len);
537 if(r < 0)
538 return r;
539 len -= r;
540 s += r;
541 }
542 return aux;
543 }
544
545 void *
546 xmalloc(size_t len) {
547 void *p = malloc(len);
548
549 if(!p)
550 die("Out of memory\n");
551
552 return p;
553 }
554
555 void *
556 xrealloc(void *p, size_t len) {
557 if((p = realloc(p, len)) == NULL)
558 die("Out of memory\n");
559
560 return p;
561 }
562
563 char *
564 xstrdup(char *s) {
565 if((s = strdup(s)) == NULL)
566 die("Out of memory\n");
567
568 return s;
569 }
570
571 size_t
572 utf8decode(char *c, long *u, size_t clen) {
573 size_t i, j, len, type;
574 long udecoded;
575
576 *u = UTF_INVALID;
577 if(!clen)
578 return 0;
579 udecoded = utf8decodebyte(c[0], &len);
580 if(!BETWEEN(len, 1, UTF_SIZ))
581 return 1;
582 for(i = 1, j = 1; i < clen && j < len; ++i, ++j) {
583 udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
584 if(type != 0)
585 return j;
586 }
587 if(j < len)
588 return 0;
589 *u = udecoded;
590 utf8validate(u, len);
591 return len;
592 }
593
594 long
595 utf8decodebyte(char c, size_t *i) {
596 for(*i = 0; *i < LEN(utfmask); ++(*i))
597 if(((uchar)c & utfmask[*i]) == utfbyte[*i])
598 return (uchar)c & ~utfmask[*i];
599 return 0;
600 }
601
602 size_t
603 utf8encode(long u, char *c, size_t clen) {
604 size_t len, i;
605
606 len = utf8validate(&u, 0);
607 if(clen < len)
608 return 0;
609 for(i = len - 1; i != 0; --i) {
610 c[i] = utf8encodebyte(u, 0);
611 u >>= 6;
612 }
613 c[0] = utf8encodebyte(u, len);
614 return len;
615 }
616
617 char
618 utf8encodebyte(long u, size_t i) {
619 return utfbyte[i] | (u & ~utfmask[i]);
620 }
621
622 size_t
623 utf8len(char *c) {
624 return utf8decode(c, &(long){0}, UTF_SIZ);
625 }
626
627 size_t
628 utf8validate(long *u, size_t i) {
629 if(!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF))
630 *u = UTF_INVALID;
631 for(i = 1; *u > utfmax[i]; ++i)
632 ;
633 return i;
634 }
635
636 static void
637 selinit(void) {
638 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
639 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
640 sel.mode = 0;
641 sel.ob.x = -1;
642 sel.clip = NULL;
643 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
644 if(sel.xtarget == None)
645 sel.xtarget = XA_STRING;
646 }
647
648 static int
649 x2col(int x) {
650 x -= borderpx;
651 x /= xw.cw;
652
653 return LIMIT(x, 0, term.col-1);
654 }
655
656 static int
657 y2row(int y) {
658 y -= borderpx;
659 y /= xw.ch;
660
661 return LIMIT(y, 0, term.row-1);
662 }
663
664 static int tlinelen(int y) {
665 int i = term.col;
666
667 while (i > 0 && term.line[y][i - 1].c[0] == ' ')
668 --i;
669
670 return i;
671 }
672
673 static void
674 selnormalize(void) {
675 int i;
676
677 if(sel.ob.y == sel.oe.y || sel.type == SEL_RECTANGULAR) {
678 sel.nb.x = MIN(sel.ob.x, sel.oe.x);
679 sel.ne.x = MAX(sel.ob.x, sel.oe.x);
680 } else {
681 sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
682 sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
683 }
684 sel.nb.y = MIN(sel.ob.y, sel.oe.y);
685 sel.ne.y = MAX(sel.ob.y, sel.oe.y);
686
687 /* expand selection over line breaks */
688 if (sel.type == SEL_RECTANGULAR)
689 return;
690 i = tlinelen(sel.nb.y);
691 if (i < sel.nb.x)
692 sel.nb.x = i;
693 if (tlinelen(sel.ne.y) <= sel.ne.x)
694 sel.ne.x = term.col - 1;
695 }
696
697 static inline bool
698 selected(int x, int y) {
699 if(sel.type == SEL_RECTANGULAR)
700 return BETWEEN(y, sel.nb.y, sel.ne.y)
701 && BETWEEN(x, sel.nb.x, sel.ne.x);
702
703 return BETWEEN(y, sel.nb.y, sel.ne.y)
704 && (y != sel.nb.y || x >= sel.nb.x)
705 && (y != sel.ne.y || x <= sel.ne.x);
706 }
707
708 void
709 selsnap(int mode, int *x, int *y, int direction) {
710 int newx, newy, xt, yt;
711 Glyph *gp;
712
713 switch(mode) {
714 case SNAP_WORD:
715 /*
716 * Snap around if the word wraps around at the end or
717 * beginning of a line.
718 */
719 for(;;) {
720 newx = *x + direction;
721 newy = *y;
722 if(!BETWEEN(newx, 0, term.col - 1)) {
723 newy += direction;
724 newx = (newx + term.col) % term.col;
725 if (!BETWEEN(newy, 0, term.row - 1))
726 break;
727
728 if(direction > 0)
729 yt = *y, xt = *x;
730 else
731 yt = newy, xt = newx;
732 if(!(term.line[yt][xt].mode & ATTR_WRAP))
733 break;
734 }
735
736 if (newx >= tlinelen(newy))
737 break;
738
739 gp = &term.line[newy][newx];
740 if (!(gp->mode & ATTR_WDUMMY) && strchr(worddelimiters, gp->c[0]))
741 break;
742
743 *x = newx;
744 *y = newy;
745 }
746 break;
747 case SNAP_LINE:
748 /*
749 * Snap around if the the previous line or the current one
750 * has set ATTR_WRAP at its end. Then the whole next or
751 * previous line will be selected.
752 */
753 *x = (direction < 0) ? 0 : term.col - 1;
754 if(direction < 0 && *y > 0) {
755 for(; *y > 0; *y += direction) {
756 if(!(term.line[*y-1][term.col-1].mode
757 & ATTR_WRAP)) {
758 break;
759 }
760 }
761 } else if(direction > 0 && *y < term.row-1) {
762 for(; *y < term.row; *y += direction) {
763 if(!(term.line[*y][term.col-1].mode
764 & ATTR_WRAP)) {
765 break;
766 }
767 }
768 }
769 break;
770 }
771 }
772
773 void
774 getbuttoninfo(XEvent *e) {
775 int type;
776 uint state = e->xbutton.state & ~(Button1Mask | forceselmod);
777
778 sel.alt = IS_SET(MODE_ALTSCREEN);
779
780 sel.oe.x = x2col(e->xbutton.x);
781 sel.oe.y = y2row(e->xbutton.y);
782
783 if(sel.ob.y < sel.oe.y
784 || (sel.ob.y == sel.oe.y && sel.ob.x < sel.oe.x)) {
785 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
786 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
787 } else {
788 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, -1);
789 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, +1);
790 }
791 selnormalize();
792
793 sel.type = SEL_REGULAR;
794 for(type = 1; type < LEN(selmasks); ++type) {
795 if(match(selmasks[type], state)) {
796 sel.type = type;
797 break;
798 }
799 }
800 }
801
802 void
803 mousereport(XEvent *e) {
804 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
805 button = e->xbutton.button, state = e->xbutton.state,
806 len;
807 char buf[40];
808 static int ox, oy;
809
810 /* from urxvt */
811 if(e->xbutton.type == MotionNotify) {
812 if(x == ox && y == oy)
813 return;
814 if(!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
815 return;
816 /* MOUSE_MOTION: no reporting if no button is pressed */
817 if(IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
818 return;
819
820 button = oldbutton + 32;
821 ox = x;
822 oy = y;
823 } else {
824 if(!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
825 button = 3;
826 } else {
827 button -= Button1;
828 if(button >= 3)
829 button += 64 - 3;
830 }
831 if(e->xbutton.type == ButtonPress) {
832 oldbutton = button;
833 ox = x;
834 oy = y;
835 } else if(e->xbutton.type == ButtonRelease) {
836 oldbutton = 3;
837 /* MODE_MOUSEX10: no button release reporting */
838 if(IS_SET(MODE_MOUSEX10))
839 return;
840 if (button == 64 || button == 65)
841 return;
842 }
843 }
844
845 if(!IS_SET(MODE_MOUSEX10)) {
846 button += (state & ShiftMask ? 4 : 0)
847 + (state & Mod4Mask ? 8 : 0)
848 + (state & ControlMask ? 16 : 0);
849 }
850
851 len = 0;
852 if(IS_SET(MODE_MOUSESGR)) {
853 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
854 button, x+1, y+1,
855 e->xbutton.type == ButtonRelease ? 'm' : 'M');
856 } else if(x < 223 && y < 223) {
857 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
858 32+button, 32+x+1, 32+y+1);
859 } else {
860 return;
861 }
862
863 ttywrite(buf, len);
864 }
865
866 void
867 bpress(XEvent *e) {
868 struct timespec now;
869 Mousekey *mk;
870
871 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
872 mousereport(e);
873 return;
874 }
875
876 for(mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
877 if(e->xbutton.button == mk->b
878 && match(mk->mask, e->xbutton.state)) {
879 ttysend(mk->s, strlen(mk->s));
880 return;
881 }
882 }
883
884 if(e->xbutton.button == Button1) {
885 clock_gettime(CLOCK_MONOTONIC, &now);
886
887 /* Clear previous selection, logically and visually. */
888 selclear(NULL);
889 sel.mode = 1;
890 sel.type = SEL_REGULAR;
891 sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
892 sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
893
894 /*
895 * If the user clicks below predefined timeouts specific
896 * snapping behaviour is exposed.
897 */
898 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
899 sel.snap = SNAP_LINE;
900 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
901 sel.snap = SNAP_WORD;
902 } else {
903 sel.snap = 0;
904 }
905 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
906 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
907 selnormalize();
908
909 /*
910 * Draw selection, unless it's regular and we don't want to
911 * make clicks visible
912 */
913 if(sel.snap != 0) {
914 sel.mode++;
915 tsetdirt(sel.nb.y, sel.ne.y);
916 }
917 sel.tclick2 = sel.tclick1;
918 sel.tclick1 = now;
919 }
920 }
921
922 char *
923 getsel(void) {
924 char *str, *ptr;
925 int y, bufsize, size, lastx, linelen;
926 Glyph *gp, *last;
927
928 if(sel.ob.x == -1)
929 return NULL;
930
931 bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
932 ptr = str = xmalloc(bufsize);
933
934 /* append every set & selected glyph to the selection */
935 for(y = sel.nb.y; y < sel.ne.y + 1; y++) {
936 linelen = tlinelen(y);
937
938 if(sel.type == SEL_RECTANGULAR) {
939 gp = &term.line[y][sel.nb.x];
940 lastx = sel.ne.x;
941 } else {
942 gp = &term.line[y][sel.nb.y == y ? sel.nb.x : 0];
943 lastx = (sel.ne.y == y) ? sel.ne.x : term.col-1;
944 }
945 last = &term.line[y][MIN(lastx, linelen-1)];
946
947 for( ; gp <= last; ++gp) {
948 if(gp->mode & ATTR_WDUMMY)
949 continue;
950
951 size = utf8len(gp->c);
952 memcpy(ptr, gp->c, size);
953 ptr += size;
954 }
955
956 /*
957 * Copy and pasting of line endings is inconsistent
958 * in the inconsistent terminal and GUI world.
959 * The best solution seems like to produce '\n' when
960 * something is copied from st and convert '\n' to
961 * '\r', when something to be pasted is received by
962 * st.
963 * FIXME: Fix the computer world.
964 */
965 if(sel.ne.y > y || lastx >= linelen)
966 *ptr++ = '\n';
967 }
968 *ptr = 0;
969 return str;
970 }
971
972 void
973 selcopy(void) {
974 xsetsel(getsel());
975 }
976
977 void
978 selnotify(XEvent *e) {
979 ulong nitems, ofs, rem;
980 int format;
981 uchar *data, *last, *repl;
982 Atom type;
983
984 ofs = 0;
985 do {
986 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
987 False, AnyPropertyType, &type, &format,
988 &nitems, &rem, &data)) {
989 fprintf(stderr, "Clipboard allocation failed\n");
990 return;
991 }
992
993 /*
994 * As seen in getsel:
995 * Line endings are inconsistent in the terminal and GUI world
996 * copy and pasting. When receiving some selection data,
997 * replace all '\n' with '\r'.
998 * FIXME: Fix the computer world.
999 */
1000 repl = data;
1001 last = data + nitems * format / 8;
1002 while((repl = memchr(repl, '\n', last - repl))) {
1003 *repl++ = '\r';
1004 }
1005
1006 if(IS_SET(MODE_BRCKTPASTE))
1007 ttywrite("\033[200~", 6);
1008 ttysend((char *)data, nitems * format / 8);
1009 if(IS_SET(MODE_BRCKTPASTE))
1010 ttywrite("\033[201~", 6);
1011 XFree(data);
1012 /* number of 32-bit chunks returned */
1013 ofs += nitems * format / 32;
1014 } while(rem > 0);
1015 }
1016
1017 void
1018 selpaste(const Arg *dummy) {
1019 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
1020 xw.win, CurrentTime);
1021 }
1022
1023 void
1024 clippaste(const Arg *dummy) {
1025 Atom clipboard;
1026
1027 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1028 XConvertSelection(xw.dpy, clipboard, sel.xtarget, XA_PRIMARY,
1029 xw.win, CurrentTime);
1030 }
1031
1032 void
1033 selclear(XEvent *e) {
1034 if(sel.ob.x == -1)
1035 return;
1036 sel.ob.x = -1;
1037 tsetdirt(sel.nb.y, sel.ne.y);
1038 }
1039
1040 void
1041 selrequest(XEvent *e) {
1042 XSelectionRequestEvent *xsre;
1043 XSelectionEvent xev;
1044 Atom xa_targets, string;
1045
1046 xsre = (XSelectionRequestEvent *) e;
1047 xev.type = SelectionNotify;
1048 xev.requestor = xsre->requestor;
1049 xev.selection = xsre->selection;
1050 xev.target = xsre->target;
1051 xev.time = xsre->time;
1052 /* reject */
1053 xev.property = None;
1054
1055 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
1056 if(xsre->target == xa_targets) {
1057 /* respond with the supported type */
1058 string = sel.xtarget;
1059 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1060 XA_ATOM, 32, PropModeReplace,
1061 (uchar *) &string, 1);
1062 xev.property = xsre->property;
1063 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
1064 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1065 xsre->target, 8, PropModeReplace,
1066 (uchar *) sel.clip, strlen(sel.clip));
1067 xev.property = xsre->property;
1068 }
1069
1070 /* all done, send a notification to the listener */
1071 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
1072 fprintf(stderr, "Error sending SelectionNotify event\n");
1073 }
1074
1075 void
1076 xsetsel(char *str) {
1077 /* register the selection for both the clipboard and the primary */
1078 Atom clipboard;
1079
1080 free(sel.clip);
1081 sel.clip = str;
1082
1083 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
1084
1085 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1086 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
1087 }
1088
1089 void
1090 brelease(XEvent *e) {
1091 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1092 mousereport(e);
1093 return;
1094 }
1095
1096 if(e->xbutton.button == Button2) {
1097 selpaste(NULL);
1098 } else if(e->xbutton.button == Button1) {
1099 if(sel.mode < 2) {
1100 selclear(NULL);
1101 } else {
1102 getbuttoninfo(e);
1103 selcopy();
1104 }
1105 sel.mode = 0;
1106 tsetdirt(sel.nb.y, sel.ne.y);
1107 }
1108 }
1109
1110 void
1111 bmotion(XEvent *e) {
1112 int oldey, oldex, oldsby, oldsey;
1113
1114 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1115 mousereport(e);
1116 return;
1117 }
1118
1119 if(!sel.mode)
1120 return;
1121
1122 sel.mode++;
1123 oldey = sel.oe.y;
1124 oldex = sel.oe.x;
1125 oldsby = sel.nb.y;
1126 oldsey = sel.ne.y;
1127 getbuttoninfo(e);
1128
1129 if(oldey != sel.oe.y || oldex != sel.oe.x)
1130 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
1131 }
1132
1133 void
1134 die(const char *errstr, ...) {
1135 va_list ap;
1136
1137 va_start(ap, errstr);
1138 vfprintf(stderr, errstr, ap);
1139 va_end(ap);
1140 exit(EXIT_FAILURE);
1141 }
1142
1143 void
1144 execsh(void) {
1145 char **args;
1146 char *envshell = getenv("SHELL");
1147 const struct passwd *pass = getpwuid(getuid());
1148 char buf[sizeof(long) * 8 + 1];
1149
1150 unsetenv("COLUMNS");
1151 unsetenv("LINES");
1152 unsetenv("TERMCAP");
1153
1154 if(pass) {
1155 setenv("LOGNAME", pass->pw_name, 1);
1156 setenv("USER", pass->pw_name, 1);
1157 setenv("SHELL", pass->pw_shell, 0);
1158 setenv("HOME", pass->pw_dir, 0);
1159 }
1160
1161 snprintf(buf, sizeof(buf), "%lu", xw.win);
1162 setenv("WINDOWID", buf, 1);
1163
1164 signal(SIGCHLD, SIG_DFL);
1165 signal(SIGHUP, SIG_DFL);
1166 signal(SIGINT, SIG_DFL);
1167 signal(SIGQUIT, SIG_DFL);
1168 signal(SIGTERM, SIG_DFL);
1169 signal(SIGALRM, SIG_DFL);
1170
1171 DEFAULT(envshell, shell);
1172 setenv("TERM", termname, 1);
1173 args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
1174 execvp(args[0], args);
1175 exit(EXIT_FAILURE);
1176 }
1177
1178 void
1179 sigchld(int a) {
1180 int stat = 0;
1181
1182 if(waitpid(pid, &stat, 0) < 0)
1183 die("Waiting for pid %hd failed: %s\n", pid, strerror(errno));
1184
1185 if(WIFEXITED(stat)) {
1186 exit(WEXITSTATUS(stat));
1187 } else {
1188 exit(EXIT_FAILURE);
1189 }
1190 }
1191
1192 void
1193 ttynew(void) {
1194 int m, s;
1195 struct winsize w = {term.row, term.col, 0, 0};
1196
1197 /* seems to work fine on linux, openbsd and freebsd */
1198 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1199 die("openpty failed: %s\n", strerror(errno));
1200
1201 switch(pid = fork()) {
1202 case -1:
1203 die("fork failed\n");
1204 break;
1205 case 0:
1206 setsid(); /* create a new process group */
1207 dup2(s, STDIN_FILENO);
1208 dup2(s, STDOUT_FILENO);
1209 dup2(s, STDERR_FILENO);
1210 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1211 die("ioctl TIOCSCTTY failed: %s\n", strerror(errno));
1212 close(s);
1213 close(m);
1214 execsh();
1215 break;
1216 default:
1217 close(s);
1218 cmdfd = m;
1219 signal(SIGCHLD, sigchld);
1220 if(opt_io) {
1221 term.mode |= MODE_PRINT;
1222 iofd = (!strcmp(opt_io, "-")) ?
1223 STDOUT_FILENO :
1224 open(opt_io, O_WRONLY | O_CREAT, 0666);
1225 if(iofd < 0) {
1226 fprintf(stderr, "Error opening %s:%s\n",
1227 opt_io, strerror(errno));
1228 }
1229 }
1230 break;
1231 }
1232 }
1233
1234 void
1235 ttyread(void) {
1236 static char buf[BUFSIZ];
1237 static int buflen = 0;
1238 char *ptr;
1239 char s[UTF_SIZ];
1240 int charsize; /* size of utf8 char in bytes */
1241 long unicodep;
1242 int ret;
1243
1244 /* append read bytes to unprocessed bytes */
1245 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1246 die("Couldn't read from shell: %s\n", strerror(errno));
1247
1248 /* process every complete utf8 char */
1249 buflen += ret;
1250 ptr = buf;
1251 while((charsize = utf8decode(ptr, &unicodep, buflen))) {
1252 utf8encode(unicodep, s, UTF_SIZ);
1253 tputc(s, charsize);
1254 ptr += charsize;
1255 buflen -= charsize;
1256 }
1257
1258 /* keep any uncomplete utf8 char for the next call */
1259 memmove(buf, ptr, buflen);
1260 }
1261
1262 void
1263 ttywrite(const char *s, size_t n) {
1264 if(xwrite(cmdfd, s, n) == -1)
1265 die("write error on tty: %s\n", strerror(errno));
1266 }
1267
1268 void
1269 ttysend(char *s, size_t n) {
1270 ttywrite(s, n);
1271 if(IS_SET(MODE_ECHO))
1272 techo(s, n);
1273 }
1274
1275 void
1276 ttyresize(void) {
1277 struct winsize w;
1278
1279 w.ws_row = term.row;
1280 w.ws_col = term.col;
1281 w.ws_xpixel = xw.tw;
1282 w.ws_ypixel = xw.th;
1283 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1284 fprintf(stderr, "Couldn't set window size: %s\n", strerror(errno));
1285 }
1286
1287 int
1288 tattrset(int attr) {
1289 int i, j;
1290
1291 for(i = 0; i < term.row-1; i++) {
1292 for(j = 0; j < term.col-1; j++) {
1293 if(term.line[i][j].mode & attr)
1294 return 1;
1295 }
1296 }
1297
1298 return 0;
1299 }
1300
1301 void
1302 tsetdirt(int top, int bot) {
1303 int i;
1304
1305 LIMIT(top, 0, term.row-1);
1306 LIMIT(bot, 0, term.row-1);
1307
1308 for(i = top; i <= bot; i++)
1309 term.dirty[i] = 1;
1310 }
1311
1312 void
1313 tsetdirtattr(int attr) {
1314 int i, j;
1315
1316 for(i = 0; i < term.row-1; i++) {
1317 for(j = 0; j < term.col-1; j++) {
1318 if(term.line[i][j].mode & attr) {
1319 tsetdirt(i, i);
1320 break;
1321 }
1322 }
1323 }
1324 }
1325
1326 void
1327 tfulldirt(void) {
1328 tsetdirt(0, term.row-1);
1329 }
1330
1331 void
1332 tcursor(int mode) {
1333 static TCursor c[2];
1334 bool alt = IS_SET(MODE_ALTSCREEN);
1335
1336 if(mode == CURSOR_SAVE) {
1337 c[alt] = term.c;
1338 } else if(mode == CURSOR_LOAD) {
1339 term.c = c[alt];
1340 tmoveto(c[alt].x, c[alt].y);
1341 }
1342 }
1343
1344 void
1345 treset(void) {
1346 uint i;
1347
1348 term.c = (TCursor){{
1349 .mode = ATTR_NULL,
1350 .fg = defaultfg,
1351 .bg = defaultbg
1352 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1353
1354 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1355 for(i = tabspaces; i < term.col; i += tabspaces)
1356 term.tabs[i] = 1;
1357 term.top = 0;
1358 term.bot = term.row - 1;
1359 term.mode = MODE_WRAP;
1360 memset(term.trantbl, sizeof(term.trantbl), CS_USA);
1361 term.charset = 0;
1362
1363 tclearregion(0, 0, term.col-1, term.row-1);
1364 tmoveto(0, 0);
1365 tcursor(CURSOR_SAVE);
1366 }
1367
1368 void
1369 tnew(int col, int row) {
1370 term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } };
1371 tresize(col, row);
1372 term.numlock = 1;
1373
1374 treset();
1375 }
1376
1377 void
1378 tswapscreen(void) {
1379 Line *tmp = term.line;
1380
1381 term.line = term.alt;
1382 term.alt = tmp;
1383 term.mode ^= MODE_ALTSCREEN;
1384 tfulldirt();
1385 }
1386
1387 void
1388 tscrolldown(int orig, int n) {
1389 int i;
1390 Line temp;
1391
1392 LIMIT(n, 0, term.bot-orig+1);
1393
1394 tsetdirt(orig, term.bot-n);
1395 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1396
1397 for(i = term.bot; i >= orig+n; i--) {
1398 temp = term.line[i];
1399 term.line[i] = term.line[i-n];
1400 term.line[i-n] = temp;
1401 }
1402
1403 selscroll(orig, n);
1404 }
1405
1406 void
1407 tscrollup(int orig, int n) {
1408 int i;
1409 Line temp;
1410
1411 LIMIT(n, 0, term.bot-orig+1);
1412
1413 tclearregion(0, orig, term.col-1, orig+n-1);
1414 tsetdirt(orig+n, term.bot);
1415
1416 for(i = orig; i <= term.bot-n; i++) {
1417 temp = term.line[i];
1418 term.line[i] = term.line[i+n];
1419 term.line[i+n] = temp;
1420 }
1421
1422 selscroll(orig, -n);
1423 }
1424
1425 void
1426 selscroll(int orig, int n) {
1427 if(sel.ob.x == -1)
1428 return;
1429
1430 if(BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
1431 if((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
1432 selclear(NULL);
1433 return;
1434 }
1435 if(sel.type == SEL_RECTANGULAR) {
1436 if(sel.ob.y < term.top)
1437 sel.ob.y = term.top;
1438 if(sel.oe.y > term.bot)
1439 sel.oe.y = term.bot;
1440 } else {
1441 if(sel.ob.y < term.top) {
1442 sel.ob.y = term.top;
1443 sel.ob.x = 0;
1444 }
1445 if(sel.oe.y > term.bot) {
1446 sel.oe.y = term.bot;
1447 sel.oe.x = term.col;
1448 }
1449 }
1450 selnormalize();
1451 }
1452 }
1453
1454 void
1455 tnewline(int first_col) {
1456 int y = term.c.y;
1457
1458 if(y == term.bot) {
1459 tscrollup(term.top, 1);
1460 } else {
1461 y++;
1462 }
1463 tmoveto(first_col ? 0 : term.c.x, y);
1464 }
1465
1466 void
1467 csiparse(void) {
1468 char *p = csiescseq.buf, *np;
1469 long int v;
1470
1471 csiescseq.narg = 0;
1472 if(*p == '?') {
1473 csiescseq.priv = 1;
1474 p++;
1475 }
1476
1477 csiescseq.buf[csiescseq.len] = '\0';
1478 while(p < csiescseq.buf+csiescseq.len) {
1479 np = NULL;
1480 v = strtol(p, &np, 10);
1481 if(np == p)
1482 v = 0;
1483 if(v == LONG_MAX || v == LONG_MIN)
1484 v = -1;
1485 csiescseq.arg[csiescseq.narg++] = v;
1486 p = np;
1487 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1488 break;
1489 p++;
1490 }
1491 csiescseq.mode = *p;
1492 }
1493
1494 /* for absolute user moves, when decom is set */
1495 void
1496 tmoveato(int x, int y) {
1497 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1498 }
1499
1500 void
1501 tmoveto(int x, int y) {
1502 int miny, maxy;
1503
1504 if(term.c.state & CURSOR_ORIGIN) {
1505 miny = term.top;
1506 maxy = term.bot;
1507 } else {
1508 miny = 0;
1509 maxy = term.row - 1;
1510 }
1511 LIMIT(x, 0, term.col-1);
1512 LIMIT(y, miny, maxy);
1513 term.c.state &= ~CURSOR_WRAPNEXT;
1514 term.c.x = x;
1515 term.c.y = y;
1516 }
1517
1518 void
1519 tsetchar(char *c, Glyph *attr, int x, int y) {
1520 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1521 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1522 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1523 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1524 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1525 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1526 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1527 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1528 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1529 };
1530
1531 /*
1532 * The table is proudly stolen from rxvt.
1533 */
1534 if(term.trantbl[term.charset] == CS_GRAPHIC0) {
1535 if(BETWEEN(c[0], 0x41, 0x7e) && vt100_0[c[0] - 0x41]) {
1536 c = vt100_0[c[0] - 0x41];
1537 }
1538 }
1539
1540 if(term.line[y][x].mode & ATTR_WIDE) {
1541 if(x+1 < term.col) {
1542 term.line[y][x+1].c[0] = ' ';
1543 term.line[y][x+1].mode &= ~ATTR_WDUMMY;
1544 }
1545 } else if(term.line[y][x].mode & ATTR_WDUMMY) {
1546 term.line[y][x-1].c[0] = ' ';
1547 term.line[y][x-1].mode &= ~ATTR_WIDE;
1548 }
1549
1550 term.dirty[y] = 1;
1551 term.line[y][x] = *attr;
1552 memcpy(term.line[y][x].c, c, UTF_SIZ);
1553 }
1554
1555 void
1556 tclearregion(int x1, int y1, int x2, int y2) {
1557 int x, y, temp;
1558
1559 if(x1 > x2)
1560 temp = x1, x1 = x2, x2 = temp;
1561 if(y1 > y2)
1562 temp = y1, y1 = y2, y2 = temp;
1563
1564 LIMIT(x1, 0, term.col-1);
1565 LIMIT(x2, 0, term.col-1);
1566 LIMIT(y1, 0, term.row-1);
1567 LIMIT(y2, 0, term.row-1);
1568
1569 for(y = y1; y <= y2; y++) {
1570 term.dirty[y] = 1;
1571 for(x = x1; x <= x2; x++) {
1572 if(selected(x, y))
1573 selclear(NULL);
1574 term.line[y][x] = term.c.attr;
1575 memcpy(term.line[y][x].c, " ", 2);
1576 }
1577 }
1578 }
1579
1580 void
1581 tdeletechar(int n) {
1582 int dst, src, size;
1583 Glyph *line;
1584
1585 LIMIT(n, 0, term.col - term.c.x);
1586
1587 dst = term.c.x;
1588 src = term.c.x + n;
1589 size = term.col - src;
1590 line = term.line[term.c.y];
1591
1592 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1593 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1594 }
1595
1596 void
1597 tinsertblank(int n) {
1598 int dst, src, size;
1599 Glyph *line;
1600
1601 LIMIT(n, 0, term.col - term.c.x);
1602
1603 dst = term.c.x + n;
1604 src = term.c.x;
1605 size = term.col - dst;
1606 line = term.line[term.c.y];
1607
1608 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1609 tclearregion(src, term.c.y, dst - 1, term.c.y);
1610 }
1611
1612 void
1613 tinsertblankline(int n) {
1614 if(BETWEEN(term.c.y, term.top, term.bot))
1615 tscrolldown(term.c.y, n);
1616 }
1617
1618 void
1619 tdeleteline(int n) {
1620 if(BETWEEN(term.c.y, term.top, term.bot))
1621 tscrollup(term.c.y, n);
1622 }
1623
1624 int32_t
1625 tdefcolor(int *attr, int *npar, int l) {
1626 int32_t idx = -1;
1627 uint r, g, b;
1628
1629 switch (attr[*npar + 1]) {
1630 case 2: /* direct color in RGB space */
1631 if (*npar + 4 >= l) {
1632 fprintf(stderr,
1633 "erresc(38): Incorrect number of parameters (%d)\n",
1634 *npar);
1635 break;
1636 }
1637 r = attr[*npar + 2];
1638 g = attr[*npar + 3];
1639 b = attr[*npar + 4];
1640 *npar += 4;
1641 if(!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
1642 fprintf(stderr, "erresc: bad rgb color (%d,%d,%d)\n",
1643 r, g, b);
1644 else
1645 idx = TRUECOLOR(r, g, b);
1646 break;
1647 case 5: /* indexed color */
1648 if (*npar + 2 >= l) {
1649 fprintf(stderr,
1650 "erresc(38): Incorrect number of parameters (%d)\n",
1651 *npar);
1652 break;
1653 }
1654 *npar += 2;
1655 if(!BETWEEN(attr[*npar], 0, 255))
1656 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
1657 else
1658 idx = attr[*npar];
1659 break;
1660 case 0: /* implemented defined (only foreground) */
1661 case 1: /* transparent */
1662 case 3: /* direct color in CMY space */
1663 case 4: /* direct color in CMYK space */
1664 default:
1665 fprintf(stderr,
1666 "erresc(38): gfx attr %d unknown\n", attr[*npar]);
1667 break;
1668 }
1669
1670 return idx;
1671 }
1672
1673 void
1674 tsetattr(int *attr, int l) {
1675 int i;
1676 int32_t idx;
1677
1678 for(i = 0; i < l; i++) {
1679 switch(attr[i]) {
1680 case 0:
1681 term.c.attr.mode &= ~(
1682 ATTR_BOLD |
1683 ATTR_FAINT |
1684 ATTR_ITALIC |
1685 ATTR_UNDERLINE |
1686 ATTR_BLINK |
1687 ATTR_FASTBLINK |
1688 ATTR_REVERSE |
1689 ATTR_INVISIBLE |
1690 ATTR_STRUCK );
1691 term.c.attr.fg = defaultfg;
1692 term.c.attr.bg = defaultbg;
1693 break;
1694 case 1:
1695 term.c.attr.mode |= ATTR_BOLD;
1696 break;
1697 case 2:
1698 term.c.attr.mode |= ATTR_FAINT;
1699 break;
1700 case 3:
1701 term.c.attr.mode |= ATTR_ITALIC;
1702 break;
1703 case 4:
1704 term.c.attr.mode |= ATTR_UNDERLINE;
1705 break;
1706 case 5: /* slow blink */
1707 term.c.attr.mode |= ATTR_BLINK;
1708 break;
1709 case 6: /* rapid blink */
1710 term.c.attr.mode |= ATTR_FASTBLINK;
1711 break;
1712 case 7:
1713 term.c.attr.mode |= ATTR_REVERSE;
1714 break;
1715 case 8:
1716 term.c.attr.mode |= ATTR_INVISIBLE;
1717 break;
1718 case 9:
1719 term.c.attr.mode |= ATTR_STRUCK;
1720 break;
1721 case 21:
1722 term.c.attr.mode &= ~ATTR_BOLD;
1723 break;
1724 case 22:
1725 term.c.attr.mode &= ~ATTR_FAINT;
1726 break;
1727 case 23:
1728 term.c.attr.mode &= ~ATTR_ITALIC;
1729 break;
1730 case 24:
1731 term.c.attr.mode &= ~ATTR_UNDERLINE;
1732 break;
1733 case 25:
1734 term.c.attr.mode &= ~ATTR_BLINK;
1735 break;
1736 case 26:
1737 term.c.attr.mode &= ~ATTR_FASTBLINK;
1738 break;
1739 case 27:
1740 term.c.attr.mode &= ~ATTR_REVERSE;
1741 break;
1742 case 28:
1743 term.c.attr.mode &= ~ATTR_INVISIBLE;
1744 break;
1745 case 29:
1746 term.c.attr.mode &= ~ATTR_STRUCK;
1747 break;
1748 case 38:
1749 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1750 term.c.attr.fg = idx;
1751 break;
1752 case 39:
1753 term.c.attr.fg = defaultfg;
1754 break;
1755 case 48:
1756 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1757 term.c.attr.bg = idx;
1758 break;
1759 case 49:
1760 term.c.attr.bg = defaultbg;
1761 break;
1762 default:
1763 if(BETWEEN(attr[i], 30, 37)) {
1764 term.c.attr.fg = attr[i] - 30;
1765 } else if(BETWEEN(attr[i], 40, 47)) {
1766 term.c.attr.bg = attr[i] - 40;
1767 } else if(BETWEEN(attr[i], 90, 97)) {
1768 term.c.attr.fg = attr[i] - 90 + 8;
1769 } else if(BETWEEN(attr[i], 100, 107)) {
1770 term.c.attr.bg = attr[i] - 100 + 8;
1771 } else {
1772 fprintf(stderr,
1773 "erresc(default): gfx attr %d unknown\n",
1774 attr[i]), csidump();
1775 }
1776 break;
1777 }
1778 }
1779 }
1780
1781 void
1782 tsetscroll(int t, int b) {
1783 int temp;
1784
1785 LIMIT(t, 0, term.row-1);
1786 LIMIT(b, 0, term.row-1);
1787 if(t > b) {
1788 temp = t;
1789 t = b;
1790 b = temp;
1791 }
1792 term.top = t;
1793 term.bot = b;
1794 }
1795
1796 void
1797 tsetmode(bool priv, bool set, int *args, int narg) {
1798 int *lim, mode;
1799 bool alt;
1800
1801 for(lim = args + narg; args < lim; ++args) {
1802 if(priv) {
1803 switch(*args) {
1804 case 1: /* DECCKM -- Cursor key */
1805 MODBIT(term.mode, set, MODE_APPCURSOR);
1806 break;
1807 case 5: /* DECSCNM -- Reverse video */
1808 mode = term.mode;
1809 MODBIT(term.mode, set, MODE_REVERSE);
1810 if(mode != term.mode)
1811 redraw(REDRAW_TIMEOUT);
1812 break;
1813 case 6: /* DECOM -- Origin */
1814 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1815 tmoveato(0, 0);
1816 break;
1817 case 7: /* DECAWM -- Auto wrap */
1818 MODBIT(term.mode, set, MODE_WRAP);
1819 break;
1820 case 0: /* Error (IGNORED) */
1821 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1822 case 3: /* DECCOLM -- Column (IGNORED) */
1823 case 4: /* DECSCLM -- Scroll (IGNORED) */
1824 case 8: /* DECARM -- Auto repeat (IGNORED) */
1825 case 18: /* DECPFF -- Printer feed (IGNORED) */
1826 case 19: /* DECPEX -- Printer extent (IGNORED) */
1827 case 42: /* DECNRCM -- National characters (IGNORED) */
1828 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1829 break;
1830 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1831 MODBIT(term.mode, !set, MODE_HIDE);
1832 break;
1833 case 9: /* X10 mouse compatibility mode */
1834 xsetpointermotion(0);
1835 MODBIT(term.mode, 0, MODE_MOUSE);
1836 MODBIT(term.mode, set, MODE_MOUSEX10);
1837 break;
1838 case 1000: /* 1000: report button press */
1839 xsetpointermotion(0);
1840 MODBIT(term.mode, 0, MODE_MOUSE);
1841 MODBIT(term.mode, set, MODE_MOUSEBTN);
1842 break;
1843 case 1002: /* 1002: report motion on button press */
1844 xsetpointermotion(0);
1845 MODBIT(term.mode, 0, MODE_MOUSE);
1846 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1847 break;
1848 case 1003: /* 1003: enable all mouse motions */
1849 xsetpointermotion(set);
1850 MODBIT(term.mode, 0, MODE_MOUSE);
1851 MODBIT(term.mode, set, MODE_MOUSEMANY);
1852 break;
1853 case 1004: /* 1004: send focus events to tty */
1854 MODBIT(term.mode, set, MODE_FOCUS);
1855 break;
1856 case 1006: /* 1006: extended reporting mode */
1857 MODBIT(term.mode, set, MODE_MOUSESGR);
1858 break;
1859 case 1034:
1860 MODBIT(term.mode, set, MODE_8BIT);
1861 break;
1862 case 1049: /* swap screen & set/restore cursor as xterm */
1863 if (!allowaltscreen)
1864 break;
1865 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1866 /* FALLTHROUGH */
1867 case 47: /* swap screen */
1868 case 1047:
1869 if (!allowaltscreen)
1870 break;
1871 alt = IS_SET(MODE_ALTSCREEN);
1872 if(alt) {
1873 tclearregion(0, 0, term.col-1,
1874 term.row-1);
1875 }
1876 if(set ^ alt) /* set is always 1 or 0 */
1877 tswapscreen();
1878 if(*args != 1049)
1879 break;
1880 /* FALLTHROUGH */
1881 case 1048:
1882 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1883 break;
1884 case 2004: /* 2004: bracketed paste mode */
1885 MODBIT(term.mode, set, MODE_BRCKTPASTE);
1886 break;
1887 /* Not implemented mouse modes. See comments there. */
1888 case 1001: /* mouse highlight mode; can hang the
1889 terminal by design when implemented. */
1890 case 1005: /* UTF-8 mouse mode; will confuse
1891 applications not supporting UTF-8
1892 and luit. */
1893 case 1015: /* urxvt mangled mouse mode; incompatible
1894 and can be mistaken for other control
1895 codes. */
1896 default:
1897 fprintf(stderr,
1898 "erresc: unknown private set/reset mode %d\n",
1899 *args);
1900 break;
1901 }
1902 } else {
1903 switch(*args) {
1904 case 0: /* Error (IGNORED) */
1905 break;
1906 case 2: /* KAM -- keyboard action */
1907 MODBIT(term.mode, set, MODE_KBDLOCK);
1908 break;
1909 case 4: /* IRM -- Insertion-replacement */
1910 MODBIT(term.mode, set, MODE_INSERT);
1911 break;
1912 case 12: /* SRM -- Send/Receive */
1913 MODBIT(term.mode, !set, MODE_ECHO);
1914 break;
1915 case 20: /* LNM -- Linefeed/new line */
1916 MODBIT(term.mode, set, MODE_CRLF);
1917 break;
1918 default:
1919 fprintf(stderr,
1920 "erresc: unknown set/reset mode %d\n",
1921 *args);
1922 break;
1923 }
1924 }
1925 }
1926 }
1927
1928 void
1929 csihandle(void) {
1930 char buf[40];
1931 int len;
1932
1933 switch(csiescseq.mode) {
1934 default:
1935 unknown:
1936 fprintf(stderr, "erresc: unknown csi ");
1937 csidump();
1938 /* die(""); */
1939 break;
1940 case '@': /* ICH -- Insert <n> blank char */
1941 DEFAULT(csiescseq.arg[0], 1);
1942 tinsertblank(csiescseq.arg[0]);
1943 break;
1944 case 'A': /* CUU -- Cursor <n> Up */
1945 DEFAULT(csiescseq.arg[0], 1);
1946 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1947 break;
1948 case 'B': /* CUD -- Cursor <n> Down */
1949 case 'e': /* VPR --Cursor <n> Down */
1950 DEFAULT(csiescseq.arg[0], 1);
1951 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1952 break;
1953 case 'i': /* MC -- Media Copy */
1954 switch(csiescseq.arg[0]) {
1955 case 0:
1956 tdump();
1957 break;
1958 case 1:
1959 tdumpline(term.c.y);
1960 break;
1961 case 2:
1962 tdumpsel();
1963 break;
1964 case 4:
1965 term.mode &= ~MODE_PRINT;
1966 break;
1967 case 5:
1968 term.mode |= MODE_PRINT;
1969 break;
1970 }
1971 break;
1972 case 'c': /* DA -- Device Attributes */
1973 if(csiescseq.arg[0] == 0)
1974 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1975 break;
1976 case 'C': /* CUF -- Cursor <n> Forward */
1977 case 'a': /* HPR -- Cursor <n> Forward */
1978 DEFAULT(csiescseq.arg[0], 1);
1979 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1980 break;
1981 case 'D': /* CUB -- Cursor <n> Backward */
1982 DEFAULT(csiescseq.arg[0], 1);
1983 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1984 break;
1985 case 'E': /* CNL -- Cursor <n> Down and first col */
1986 DEFAULT(csiescseq.arg[0], 1);
1987 tmoveto(0, term.c.y+csiescseq.arg[0]);
1988 break;
1989 case 'F': /* CPL -- Cursor <n> Up and first col */
1990 DEFAULT(csiescseq.arg[0], 1);
1991 tmoveto(0, term.c.y-csiescseq.arg[0]);
1992 break;
1993 case 'g': /* TBC -- Tabulation clear */
1994 switch(csiescseq.arg[0]) {
1995 case 0: /* clear current tab stop */
1996 term.tabs[term.c.x] = 0;
1997 break;
1998 case 3: /* clear all the tabs */
1999 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
2000 break;
2001 default:
2002 goto unknown;
2003 }
2004 break;
2005 case 'G': /* CHA -- Move to <col> */
2006 case '`': /* HPA */
2007 DEFAULT(csiescseq.arg[0], 1);
2008 tmoveto(csiescseq.arg[0]-1, term.c.y);
2009 break;
2010 case 'H': /* CUP -- Move to <row> <col> */
2011 case 'f': /* HVP */
2012 DEFAULT(csiescseq.arg[0], 1);
2013 DEFAULT(csiescseq.arg[1], 1);
2014 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
2015 break;
2016 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
2017 DEFAULT(csiescseq.arg[0], 1);
2018 tputtab(csiescseq.arg[0]);
2019 break;
2020 case 'J': /* ED -- Clear screen */
2021 selclear(NULL);
2022 switch(csiescseq.arg[0]) {
2023 case 0: /* below */
2024 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
2025 if(term.c.y < term.row-1) {
2026 tclearregion(0, term.c.y+1, term.col-1,
2027 term.row-1);
2028 }
2029 break;
2030 case 1: /* above */
2031 if(term.c.y > 1)
2032 tclearregion(0, 0, term.col-1, term.c.y-1);
2033 tclearregion(0, term.c.y, term.c.x, term.c.y);
2034 break;
2035 case 2: /* all */
2036 tclearregion(0, 0, term.col-1, term.row-1);
2037 break;
2038 default:
2039 goto unknown;
2040 }
2041 break;
2042 case 'K': /* EL -- Clear line */
2043 switch(csiescseq.arg[0]) {
2044 case 0: /* right */
2045 tclearregion(term.c.x, term.c.y, term.col-1,
2046 term.c.y);
2047 break;
2048 case 1: /* left */
2049 tclearregion(0, term.c.y, term.c.x, term.c.y);
2050 break;
2051 case 2: /* all */
2052 tclearregion(0, term.c.y, term.col-1, term.c.y);
2053 break;
2054 }
2055 break;
2056 case 'S': /* SU -- Scroll <n> line up */
2057 DEFAULT(csiescseq.arg[0], 1);
2058 tscrollup(term.top, csiescseq.arg[0]);
2059 break;
2060 case 'T': /* SD -- Scroll <n> line down */
2061 DEFAULT(csiescseq.arg[0], 1);
2062 tscrolldown(term.top, csiescseq.arg[0]);
2063 break;
2064 case 'L': /* IL -- Insert <n> blank lines */
2065 DEFAULT(csiescseq.arg[0], 1);
2066 tinsertblankline(csiescseq.arg[0]);
2067 break;
2068 case 'l': /* RM -- Reset Mode */
2069 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
2070 break;
2071 case 'M': /* DL -- Delete <n> lines */
2072 DEFAULT(csiescseq.arg[0], 1);
2073 tdeleteline(csiescseq.arg[0]);
2074 break;
2075 case 'X': /* ECH -- Erase <n> char */
2076 DEFAULT(csiescseq.arg[0], 1);
2077 tclearregion(term.c.x, term.c.y,
2078 term.c.x + csiescseq.arg[0] - 1, term.c.y);
2079 break;
2080 case 'P': /* DCH -- Delete <n> char */
2081 DEFAULT(csiescseq.arg[0], 1);
2082 tdeletechar(csiescseq.arg[0]);
2083 break;
2084 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
2085 DEFAULT(csiescseq.arg[0], 1);
2086 tputtab(-csiescseq.arg[0]);
2087 break;
2088 case 'd': /* VPA -- Move to <row> */
2089 DEFAULT(csiescseq.arg[0], 1);
2090 tmoveato(term.c.x, csiescseq.arg[0]-1);
2091 break;
2092 case 'h': /* SM -- Set terminal mode */
2093 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
2094 break;
2095 case 'm': /* SGR -- Terminal attribute (color) */
2096 tsetattr(csiescseq.arg, csiescseq.narg);
2097 break;
2098 case 'n': /* DSR – Device Status Report (cursor position) */
2099 if (csiescseq.arg[0] == 6) {
2100 len = snprintf(buf, sizeof(buf),"\033[%i;%iR",
2101 term.c.y+1, term.c.x+1);
2102 ttywrite(buf, len);
2103 }
2104 break;
2105 case 'r': /* DECSTBM -- Set Scrolling Region */
2106 if(csiescseq.priv) {
2107 goto unknown;
2108 } else {
2109 DEFAULT(csiescseq.arg[0], 1);
2110 DEFAULT(csiescseq.arg[1], term.row);
2111 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
2112 tmoveato(0, 0);
2113 }
2114 break;
2115 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
2116 tcursor(CURSOR_SAVE);
2117 break;
2118 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
2119 tcursor(CURSOR_LOAD);
2120 break;
2121 }
2122 }
2123
2124 void
2125 csidump(void) {
2126 int i;
2127 uint c;
2128
2129 printf("ESC[");
2130 for(i = 0; i < csiescseq.len; i++) {
2131 c = csiescseq.buf[i] & 0xff;
2132 if(isprint(c)) {
2133 putchar(c);
2134 } else if(c == '\n') {
2135 printf("(\\n)");
2136 } else if(c == '\r') {
2137 printf("(\\r)");
2138 } else if(c == 0x1b) {
2139 printf("(\\e)");
2140 } else {
2141 printf("(%02x)", c);
2142 }
2143 }
2144 putchar('\n');
2145 }
2146
2147 void
2148 csireset(void) {
2149 memset(&csiescseq, 0, sizeof(csiescseq));
2150 }
2151
2152 void
2153 strhandle(void) {
2154 char *p = NULL;
2155 int j, narg, par;
2156
2157 term.esc &= ~(ESC_STR_END|ESC_STR);
2158 strparse();
2159 narg = strescseq.narg;
2160 par = atoi(strescseq.args[0]);
2161
2162 switch(strescseq.type) {
2163 case ']': /* OSC -- Operating System Command */
2164 switch(par) {
2165 case 0:
2166 case 1:
2167 case 2:
2168 if(narg > 1)
2169 xsettitle(strescseq.args[1]);
2170 return;
2171 case 4: /* color set */
2172 if(narg < 3)
2173 break;
2174 p = strescseq.args[2];
2175 /* FALLTHROUGH */
2176 case 104: /* color reset, here p = NULL */
2177 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2178 if(xsetcolorname(j, p)) {
2179 fprintf(stderr, "erresc: invalid color %s\n", p);
2180 } else {
2181 /*
2182 * TODO if defaultbg color is changed, borders
2183 * are dirty
2184 */
2185 redraw(0);
2186 }
2187 return;
2188 }
2189 break;
2190 case 'k': /* old title set compatibility */
2191 xsettitle(strescseq.args[0]);
2192 return;
2193 case 'P': /* DCS -- Device Control String */
2194 case '_': /* APC -- Application Program Command */
2195 case '^': /* PM -- Privacy Message */
2196 return;
2197 }
2198
2199 fprintf(stderr, "erresc: unknown str ");
2200 strdump();
2201 }
2202
2203 void
2204 strparse(void) {
2205 char *p = strescseq.buf;
2206
2207 strescseq.narg = 0;
2208 strescseq.buf[strescseq.len] = '\0';
2209 while(p && strescseq.narg < STR_ARG_SIZ)
2210 strescseq.args[strescseq.narg++] = strsep(&p, ";");
2211 }
2212
2213 void
2214 strdump(void) {
2215 int i;
2216 uint c;
2217
2218 printf("ESC%c", strescseq.type);
2219 for(i = 0; i < strescseq.len; i++) {
2220 c = strescseq.buf[i] & 0xff;
2221 if(c == '\0') {
2222 return;
2223 } else if(isprint(c)) {
2224 putchar(c);
2225 } else if(c == '\n') {
2226 printf("(\\n)");
2227 } else if(c == '\r') {
2228 printf("(\\r)");
2229 } else if(c == 0x1b) {
2230 printf("(\\e)");
2231 } else {
2232 printf("(%02x)", c);
2233 }
2234 }
2235 printf("ESC\\\n");
2236 }
2237
2238 void
2239 strreset(void) {
2240 memset(&strescseq, 0, sizeof(strescseq));
2241 }
2242
2243 void
2244 tprinter(char *s, size_t len) {
2245 if(iofd != -1 && xwrite(iofd, s, len) < 0) {
2246 fprintf(stderr, "Error writing in %s:%s\n",
2247 opt_io, strerror(errno));
2248 close(iofd);
2249 iofd = -1;
2250 }
2251 }
2252
2253 void
2254 toggleprinter(const Arg *arg) {
2255 term.mode ^= MODE_PRINT;
2256 }
2257
2258 void
2259 printscreen(const Arg *arg) {
2260 tdump();
2261 }
2262
2263 void
2264 printsel(const Arg *arg) {
2265 tdumpsel();
2266 }
2267
2268 void
2269 tdumpsel(void) {
2270 char *ptr;
2271
2272 if((ptr = getsel())) {
2273 tprinter(ptr, strlen(ptr));
2274 free(ptr);
2275 }
2276 }
2277
2278 void
2279 tdumpline(int n) {
2280 Glyph *bp, *end;
2281
2282 bp = &term.line[n][0];
2283 end = &bp[MIN(tlinelen(n), term.col) - 1];
2284 if(bp != end || bp->c[0] != ' ') {
2285 for( ;bp <= end; ++bp)
2286 tprinter(bp->c, utf8len(bp->c));
2287 }
2288 tprinter("\n", 1);
2289 }
2290
2291 void
2292 tdump(void) {
2293 int i;
2294
2295 for(i = 0; i < term.row; ++i)
2296 tdumpline(i);
2297 }
2298
2299 void
2300 tputtab(int n) {
2301 uint x = term.c.x;
2302
2303 if(n > 0) {
2304 while(x < term.col && n--)
2305 for(++x; x < term.col && !term.tabs[x]; ++x)
2306 /* nothing */ ;
2307 } else if(n < 0) {
2308 while(x > 0 && n++)
2309 for(--x; x > 0 && !term.tabs[x]; --x)
2310 /* nothing */ ;
2311 }
2312 tmoveto(x, term.c.y);
2313 }
2314
2315 void
2316 techo(char *buf, int len) {
2317 for(; len > 0; buf++, len--) {
2318 char c = *buf;
2319
2320 if(ISCONTROL(c)) { /* control code */
2321 if(c & 0x80) {
2322 c &= 0x7f;
2323 tputc("^", 1);
2324 tputc("[", 1);
2325 } else if(c != '\n' && c != '\r' && c != '\t') {
2326 c ^= '\x40';
2327 tputc("^", 1);
2328 }
2329 tputc(&c, 1);
2330 } else {
2331 break;
2332 }
2333 }
2334 if(len)
2335 tputc(buf, len);
2336 }
2337
2338 void
2339 tdeftran(char ascii) {
2340 static char cs[] = "0B";
2341 static int vcs[] = {CS_GRAPHIC0, CS_USA};
2342 char *p;
2343
2344 if((p = strchr(cs, ascii)) == NULL) {
2345 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2346 } else {
2347 term.trantbl[term.icharset] = vcs[p - cs];
2348 }
2349 }
2350
2351 void
2352 tstrsequence(uchar c) {
2353 if (c & 0x80) {
2354 switch (c) {
2355 case 0x90: /* DCS -- Device Control String */
2356 c = 'P';
2357 break;
2358 case 0x9f: /* APC -- Application Program Command */
2359 c = '_';
2360 break;
2361 case 0x9e: /* PM -- Privacy Message */
2362 c = '^';
2363 break;
2364 case 0x9d: /* OSC -- Operating System Command */
2365 c = ']';
2366 break;
2367 }
2368 }
2369 strreset();
2370 strescseq.type = c;
2371 term.esc |= ESC_STR;
2372 return;
2373 }
2374
2375 void
2376 tcontrolcode(uchar ascii) {
2377 static char question[UTF_SIZ] = "?";
2378
2379 switch(ascii) {
2380 case '\t': /* HT */
2381 tputtab(1);
2382 return;
2383 case '\b': /* BS */
2384 tmoveto(term.c.x-1, term.c.y);
2385 return;
2386 case '\r': /* CR */
2387 tmoveto(0, term.c.y);
2388 return;
2389 case '\f': /* LF */
2390 case '\v': /* VT */
2391 case '\n': /* LF */
2392 /* go to first col if the mode is set */
2393 tnewline(IS_SET(MODE_CRLF));
2394 return;
2395 case '\a': /* BEL */
2396 if(term.esc & ESC_STR_END) {
2397 /* backwards compatibility to xterm */
2398 strhandle();
2399 } else {
2400 if(!(xw.state & WIN_FOCUSED))
2401 xseturgency(1);
2402 if (bellvolume)
2403 XBell(xw.dpy, bellvolume);
2404 }
2405 break;
2406 case '\033': /* ESC */
2407 csireset();
2408 term.esc &= ~(ESC_CSI|ESC_ALTCHARSET|ESC_TEST);
2409 term.esc |= ESC_START;
2410 return;
2411 case '\016': /* SO */
2412 term.charset = 0;
2413 return;
2414 case '\017': /* SI */
2415 term.charset = 1;
2416 return;
2417 case '\032': /* SUB */
2418 tsetchar(question, &term.c.attr, term.c.x, term.c.y);
2419 case '\030': /* CAN */
2420 csireset();
2421 break;
2422 case '\005': /* ENQ (IGNORED) */
2423 case '\000': /* NUL (IGNORED) */
2424 case '\021': /* XON (IGNORED) */
2425 case '\023': /* XOFF (IGNORED) */
2426 case 0177: /* DEL (IGNORED) */
2427 return;
2428 case 0x84: /* TODO: IND */
2429 break;
2430 case 0x85: /* NEL -- Next line */
2431 tnewline(1); /* always go to first col */
2432 break;
2433 case 0x88: /* HTS -- Horizontal tab stop */
2434 term.tabs[term.c.x] = 1;
2435 break;
2436 case 0x8d: /* TODO: RI */
2437 case 0x8e: /* TODO: SS2 */
2438 case 0x8f: /* TODO: SS3 */
2439 case 0x98: /* TODO: SOS */
2440 break;
2441 case 0x9a: /* DECID -- Identify Terminal */
2442 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2443 break;
2444 case 0x9b: /* TODO: CSI */
2445 case 0x9c: /* TODO: ST */
2446 break;
2447 case 0x90: /* DCS -- Device Control String */
2448 case 0x9f: /* APC -- Application Program Command */
2449 case 0x9e: /* PM -- Privacy Message */
2450 case 0x9d: /* OSC -- Operating System Command */
2451 tstrsequence(ascii);
2452 return;
2453 }
2454 /* only CAN, SUB, \a and C1 chars interrupt a sequence */
2455 term.esc &= ~(ESC_STR_END|ESC_STR);
2456 return;
2457 }
2458
2459 void
2460 tdectest(char c) {
2461 static char E[UTF_SIZ] = "E";
2462 int x, y;
2463
2464 if(c == '8') { /* DEC screen alignment test. */
2465 for(x = 0; x < term.col; ++x) {
2466 for(y = 0; y < term.row; ++y)
2467 tsetchar(E, &term.c.attr, x, y);
2468 }
2469 }
2470 }
2471
2472 void
2473 tputc(char *c, int len) {
2474 uchar ascii;
2475 bool control;
2476 long unicodep;
2477 int width;
2478 Glyph *gp;
2479
2480 if(len == 1) {
2481 width = 1;
2482 unicodep = ascii = *c;
2483 } else {
2484 utf8decode(c, &unicodep, UTF_SIZ);
2485 width = wcwidth(unicodep);
2486 control = ISCONTROLC1(unicodep);
2487 ascii = unicodep;
2488 }
2489
2490 if(IS_SET(MODE_PRINT))
2491 tprinter(c, len);
2492 control = ISCONTROL(unicodep);
2493
2494 /*
2495 * STR sequence must be checked before anything else
2496 * because it uses all following characters until it
2497 * receives a ESC, a SUB, a ST or any other C1 control
2498 * character.
2499 */
2500 if(term.esc & ESC_STR) {
2501 if(width == 1 &&
2502 (ascii == '\a' || ascii == 030 ||
2503 ascii == 032 || ascii == 033 ||
2504 ISCONTROLC1(unicodep))) {
2505 term.esc &= ~(ESC_START|ESC_STR);
2506 term.esc |= ESC_STR_END;
2507 } else if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2508 memmove(&strescseq.buf[strescseq.len], c, len);
2509 strescseq.len += len;
2510 return;
2511 } else {
2512 /*
2513 * Here is a bug in terminals. If the user never sends
2514 * some code to stop the str or esc command, then st
2515 * will stop responding. But this is better than
2516 * silently failing with unknown characters. At least
2517 * then users will report back.
2518 *
2519 * In the case users ever get fixed, here is the code:
2520 */
2521 /*
2522 * term.esc = 0;
2523 * strhandle();
2524 */
2525 return;
2526 }
2527 }
2528
2529 /*
2530 * Actions of control codes must be performed as soon they arrive
2531 * because they can be embedded inside a control sequence, and
2532 * they must not cause conflicts with sequences.
2533 */
2534 if(control) {
2535 tcontrolcode(ascii);
2536 /*
2537 * control codes are not shown ever
2538 */
2539 return;
2540 } else if(term.esc & ESC_START) {
2541 if(term.esc & ESC_CSI) {
2542 csiescseq.buf[csiescseq.len++] = ascii;
2543 if(BETWEEN(ascii, 0x40, 0x7E)
2544 || csiescseq.len >= \
2545 sizeof(csiescseq.buf)-1) {
2546 term.esc = 0;
2547 csiparse();
2548 csihandle();
2549 }
2550 return;
2551 } else if(term.esc & ESC_ALTCHARSET) {
2552 tdeftran(ascii);
2553 } else if(term.esc & ESC_TEST) {
2554 tdectest(ascii);
2555 } else {
2556 switch(ascii) {
2557 case '[':
2558 term.esc |= ESC_CSI;
2559 return;
2560 case '#':
2561 term.esc |= ESC_TEST;
2562 return;
2563 case 'P': /* DCS -- Device Control String */
2564 case '_': /* APC -- Application Program Command */
2565 case '^': /* PM -- Privacy Message */
2566 case ']': /* OSC -- Operating System Command */
2567 case 'k': /* old title set compatibility */
2568 tstrsequence(ascii);
2569 return;
2570 case '(': /* set primary charset G0 */
2571 case ')': /* set secondary charset G1 */
2572 case '*': /* set tertiary charset G2 */
2573 case '+': /* set quaternary charset G3 */
2574 term.icharset = ascii - '(';
2575 term.esc |= ESC_ALTCHARSET;
2576 return;
2577 case 'D': /* IND -- Linefeed */
2578 if(term.c.y == term.bot) {
2579 tscrollup(term.top, 1);
2580 } else {
2581 tmoveto(term.c.x, term.c.y+1);
2582 }
2583 break;
2584 case 'E': /* NEL -- Next line */
2585 tnewline(1); /* always go to first col */
2586 break;
2587 case 'H': /* HTS -- Horizontal tab stop */
2588 term.tabs[term.c.x] = 1;
2589 break;
2590 case 'M': /* RI -- Reverse index */
2591 if(term.c.y == term.top) {
2592 tscrolldown(term.top, 1);
2593 } else {
2594 tmoveto(term.c.x, term.c.y-1);
2595 }
2596 break;
2597 case 'Z': /* DECID -- Identify Terminal */
2598 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2599 break;
2600 case 'c': /* RIS -- Reset to inital state */
2601 treset();
2602 xresettitle();
2603 xloadcols();
2604 break;
2605 case '=': /* DECPAM -- Application keypad */
2606 term.mode |= MODE_APPKEYPAD;
2607 break;
2608 case '>': /* DECPNM -- Normal keypad */
2609 term.mode &= ~MODE_APPKEYPAD;
2610 break;
2611 case '7': /* DECSC -- Save Cursor */
2612 tcursor(CURSOR_SAVE);
2613 break;
2614 case '8': /* DECRC -- Restore Cursor */
2615 tcursor(CURSOR_LOAD);
2616 break;
2617 case '\\': /* ST -- String Terminator */
2618 if(term.esc & ESC_STR_END)
2619 strhandle();
2620 break;
2621 default:
2622 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2623 (uchar) ascii, isprint(ascii)? ascii:'.');
2624 break;
2625 }
2626 }
2627 term.esc = 0;
2628 /*
2629 * All characters which form part of a sequence are not
2630 * printed
2631 */
2632 return;
2633 }
2634 if(sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
2635 selclear(NULL);
2636
2637 gp = &term.line[term.c.y][term.c.x];
2638 if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2639 gp->mode |= ATTR_WRAP;
2640 tnewline(1);
2641 }
2642
2643 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col)
2644 memmove(gp+1, gp, (term.col - term.c.x - 1) * sizeof(Glyph));
2645
2646 if(term.c.x+width > term.col)
2647 tnewline(1);
2648
2649 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2650
2651 if(width == 2) {
2652 gp->mode |= ATTR_WIDE;
2653 if(term.c.x+1 < term.col) {
2654 gp[1].c[0] = '\0';
2655 gp[1].mode = ATTR_WDUMMY;
2656 }
2657 }
2658 if(term.c.x+width < term.col) {
2659 tmoveto(term.c.x+width, term.c.y);
2660 } else {
2661 term.c.state |= CURSOR_WRAPNEXT;
2662 }
2663 }
2664
2665 int
2666 tresize(int col, int row) {
2667 int i;
2668 int minrow = MIN(row, term.row);
2669 int mincol = MIN(col, term.col);
2670 int slide = term.c.y - row + 1;
2671 bool *bp;
2672 Line *orig;
2673 TCursor c;
2674
2675 if(col < 1 || row < 1)
2676 return 0;
2677
2678 /* free unneeded rows */
2679 i = 0;
2680 if(slide > 0) {
2681 /*
2682 * slide screen to keep cursor where we expect it -
2683 * tscrollup would work here, but we can optimize to
2684 * memmove because we're freeing the earlier lines
2685 */
2686 for(/* i = 0 */; i < slide; i++) {
2687 free(term.line[i]);
2688 free(term.alt[i]);
2689 }
2690 memmove(term.line, term.line + slide, row * sizeof(Line));
2691 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2692 }
2693 for(i += row; i < term.row; i++) {
2694 free(term.line[i]);
2695 free(term.alt[i]);
2696 }
2697
2698 /* resize to new height */
2699 term.line = xrealloc(term.line, row * sizeof(Line));
2700 term.alt = xrealloc(term.alt, row * sizeof(Line));
2701 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2702 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2703
2704 /* resize each row to new width, zero-pad if needed */
2705 for(i = 0; i < minrow; i++) {
2706 term.dirty[i] = 1;
2707 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2708 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2709 }
2710
2711 /* allocate any new rows */
2712 for(/* i == minrow */; i < row; i++) {
2713 term.dirty[i] = 1;
2714 term.line[i] = xmalloc(col * sizeof(Glyph));
2715 term.alt[i] = xmalloc(col * sizeof(Glyph));
2716 }
2717 if(col > term.col) {
2718 bp = term.tabs + term.col;
2719
2720 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2721 while(--bp > term.tabs && !*bp)
2722 /* nothing */ ;
2723 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2724 *bp = 1;
2725 }
2726 /* update terminal size */
2727 term.col = col;
2728 term.row = row;
2729 /* reset scrolling region */
2730 tsetscroll(0, row-1);
2731 /* make use of the LIMIT in tmoveto */
2732 tmoveto(term.c.x, term.c.y);
2733 /* Clearing both screens */
2734 orig = term.line;
2735 c = term.c;
2736 do {
2737 if(mincol < col && 0 < minrow) {
2738 tclearregion(mincol, 0, col - 1, minrow - 1);
2739 }
2740 if(0 < col && minrow < row) {
2741 tclearregion(0, minrow, col - 1, row - 1);
2742 }
2743 tswapscreen();
2744 tcursor(CURSOR_LOAD);
2745 } while(orig != term.line);
2746 term.c = c;
2747
2748 return (slide > 0);
2749 }
2750
2751 void
2752 xresize(int col, int row) {
2753 xw.tw = MAX(1, col * xw.cw);
2754 xw.th = MAX(1, row * xw.ch);
2755
2756 XFreePixmap(xw.dpy, xw.buf);
2757 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2758 DefaultDepth(xw.dpy, xw.scr));
2759 XftDrawChange(xw.draw, xw.buf);
2760 xclear(0, 0, xw.w, xw.h);
2761 }
2762
2763 static inline ushort
2764 sixd_to_16bit(int x) {
2765 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2766 }
2767
2768 void
2769 xloadcols(void) {
2770 int i;
2771 XRenderColor color = { .alpha = 0xffff };
2772 static bool loaded;
2773 Color *cp;
2774
2775 if(loaded) {
2776 for (cp = dc.col; cp < dc.col + LEN(dc.col); ++cp)
2777 XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
2778 }
2779
2780 /* load colors [0-15] and [256-LEN(colorname)] (config.h) */
2781 for(i = 0; i < LEN(colorname); i++) {
2782 if(!colorname[i])
2783 continue;
2784 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2785 die("Could not allocate color '%s'\n", colorname[i]);
2786 }
2787 }
2788
2789 /* load colors [16-231] ; same colors as xterm */
2790 for(i = 16; i < 6*6*6+16; i++) {
2791 color.red = sixd_to_16bit( ((i-16)/36)%6 );
2792 color.green = sixd_to_16bit( ((i-16)/6) %6 );
2793 color.blue = sixd_to_16bit( ((i-16)/1) %6 );
2794 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i]))
2795 die("Could not allocate color %d\n", i);
2796 }
2797
2798 /* load colors [232-255] ; grayscale */
2799 for(; i < 256; i++) {
2800 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (i-(6*6*6+16));
2801 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i]))
2802 die("Could not allocate color %d\n", i);
2803 }
2804 loaded = true;
2805 }
2806
2807 int
2808 xsetcolorname(int x, const char *name) {
2809 XRenderColor color = { .alpha = 0xffff };
2810 Color ncolor;
2811
2812 if(!BETWEEN(x, 0, LEN(colorname)))
2813 return 1;
2814
2815 if(!name) {
2816 if(BETWEEN(x, 16, 16 + 215)) { /* 256 color */
2817 color.red = sixd_to_16bit( ((x-16)/36)%6 );
2818 color.green = sixd_to_16bit( ((x-16)/6) %6 );
2819 color.blue = sixd_to_16bit( ((x-16)/1) %6 );
2820 if(!XftColorAllocValue(xw.dpy, xw.vis,
2821 xw.cmap, &color, &ncolor)) {
2822 return 1;
2823 }
2824
2825 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2826 dc.col[x] = ncolor;
2827 return 0;
2828 } else if(BETWEEN(x, 16 + 216, 255)) { /* greyscale */
2829 color.red = color.green = color.blue = \
2830 0x0808 + 0x0a0a * (x - (16 + 216));
2831 if(!XftColorAllocValue(xw.dpy, xw.vis,
2832 xw.cmap, &color, &ncolor)) {
2833 return 1;
2834 }
2835
2836 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2837 dc.col[x] = ncolor;
2838 return 0;
2839 } else { /* system colors */
2840 name = colorname[x];
2841 }
2842 }
2843 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &ncolor))
2844 return 1;
2845
2846 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2847 dc.col[x] = ncolor;
2848 return 0;
2849 }
2850
2851 void
2852 xtermclear(int col1, int row1, int col2, int row2) {
2853 XftDrawRect(xw.draw,
2854 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2855 borderpx + col1 * xw.cw,
2856 borderpx + row1 * xw.ch,
2857 (col2-col1+1) * xw.cw,
2858 (row2-row1+1) * xw.ch);
2859 }
2860
2861 /*
2862 * Absolute coordinates.
2863 */
2864 void
2865 xclear(int x1, int y1, int x2, int y2) {
2866 XftDrawRect(xw.draw,
2867 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2868 x1, y1, x2-x1, y2-y1);
2869 }
2870
2871 void
2872 xhints(void) {
2873 XClassHint class = {opt_class ? opt_class : termname, termname};
2874 XWMHints wm = {.flags = InputHint, .input = 1};
2875 XSizeHints *sizeh = NULL;
2876
2877 sizeh = XAllocSizeHints();
2878
2879 sizeh->flags = PSize | PResizeInc | PBaseSize;
2880 sizeh->height = xw.h;
2881 sizeh->width = xw.w;
2882 sizeh->height_inc = xw.ch;
2883 sizeh->width_inc = xw.cw;
2884 sizeh->base_height = 2 * borderpx;
2885 sizeh->base_width = 2 * borderpx;
2886 if(xw.isfixed == True) {
2887 sizeh->flags |= PMaxSize | PMinSize;
2888 sizeh->min_width = sizeh->max_width = xw.w;
2889 sizeh->min_height = sizeh->max_height = xw.h;
2890 }
2891 if(xw.gm & (XValue|YValue)) {
2892 sizeh->flags |= USPosition | PWinGravity;
2893 sizeh->x = xw.l;
2894 sizeh->y = xw.t;
2895 sizeh->win_gravity = xgeommasktogravity(xw.gm);
2896 }
2897
2898 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
2899 &class);
2900 XFree(sizeh);
2901 }
2902
2903 int
2904 xgeommasktogravity(int mask) {
2905 switch(mask & (XNegative|YNegative)) {
2906 case 0:
2907 return NorthWestGravity;
2908 case XNegative:
2909 return NorthEastGravity;
2910 case YNegative:
2911 return SouthWestGravity;
2912 }
2913 return SouthEastGravity;
2914 }
2915
2916 int
2917 xloadfont(Font *f, FcPattern *pattern) {
2918 FcPattern *match;
2919 FcResult result;
2920
2921 match = FcFontMatch(NULL, pattern, &result);
2922 if(!match)
2923 return 1;
2924
2925 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2926 FcPatternDestroy(match);
2927 return 1;
2928 }
2929
2930 f->set = NULL;
2931 f->pattern = FcPatternDuplicate(pattern);
2932
2933 f->ascent = f->match->ascent;
2934 f->descent = f->match->descent;
2935 f->lbearing = 0;
2936 f->rbearing = f->match->max_advance_width;
2937
2938 f->height = f->ascent + f->descent;
2939 f->width = f->lbearing + f->rbearing;
2940
2941 return 0;
2942 }
2943
2944 void
2945 xloadfonts(char *fontstr, double fontsize) {
2946 FcPattern *pattern;
2947 FcResult r_sz, r_psz;
2948 double fontval;
2949 float ceilf(float);
2950
2951 if(fontstr[0] == '-') {
2952 pattern = XftXlfdParse(fontstr, False, False);
2953 } else {
2954 pattern = FcNameParse((FcChar8 *)fontstr);
2955 }
2956
2957 if(!pattern)
2958 die("st: can't open font %s\n", fontstr);
2959
2960 if(fontsize > 0) {
2961 FcPatternDel(pattern, FC_PIXEL_SIZE);
2962 FcPatternDel(pattern, FC_SIZE);
2963 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2964 usedfontsize = fontsize;
2965 } else {
2966 r_psz = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2967 r_sz = FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval);
2968 if(r_psz == FcResultMatch) {
2969 usedfontsize = fontval;
2970 } else if(r_sz == FcResultMatch) {
2971 usedfontsize = -1;
2972 } else {
2973 /*
2974 * Default font size is 12, if none given. This is to
2975 * have a known usedfontsize value.
2976 */
2977 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
2978 usedfontsize = 12;
2979 }
2980 }
2981
2982 FcConfigSubstitute(0, pattern, FcMatchPattern);
2983 FcDefaultSubstitute(pattern);
2984
2985 if(xloadfont(&dc.font, pattern))
2986 die("st: can't open font %s\n", fontstr);
2987
2988 if(usedfontsize < 0) {
2989 FcPatternGetDouble(dc.font.match->pattern,
2990 FC_PIXEL_SIZE, 0, &fontval);
2991 usedfontsize = fontval;
2992 }
2993
2994 /* Setting character width and height. */
2995 xw.cw = ceilf(dc.font.width * cwscale);
2996 xw.ch = ceilf(dc.font.height * chscale);
2997
2998 FcPatternDel(pattern, FC_SLANT);
2999 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
3000 if(xloadfont(&dc.ifont, pattern))
3001 die("st: can't open font %s\n", fontstr);
3002
3003 FcPatternDel(pattern, FC_WEIGHT);
3004 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
3005 if(xloadfont(&dc.ibfont, pattern))
3006 die("st: can't open font %s\n", fontstr);
3007
3008 FcPatternDel(pattern, FC_SLANT);
3009 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
3010 if(xloadfont(&dc.bfont, pattern))
3011 die("st: can't open font %s\n", fontstr);
3012
3013 FcPatternDestroy(pattern);
3014 }
3015
3016 int
3017 xloadfontset(Font *f) {
3018 FcResult result;
3019
3020 if(!(f->set = FcFontSort(0, f->pattern, FcTrue, 0, &result)))
3021 return 1;
3022 return 0;
3023 }
3024
3025 void
3026 xunloadfont(Font *f) {
3027 XftFontClose(xw.dpy, f->match);
3028 FcPatternDestroy(f->pattern);
3029 if(f->set)
3030 FcFontSetDestroy(f->set);
3031 }
3032
3033 void
3034 xunloadfonts(void) {
3035 /* Free the loaded fonts in the font cache. */
3036 while(frclen > 0)
3037 XftFontClose(xw.dpy, frc[--frclen].font);
3038
3039 xunloadfont(&dc.font);
3040 xunloadfont(&dc.bfont);
3041 xunloadfont(&dc.ifont);
3042 xunloadfont(&dc.ibfont);
3043 }
3044
3045 void
3046 xzoom(const Arg *arg) {
3047 xunloadfonts();
3048 xloadfonts(usedfont, usedfontsize + arg->i);
3049 cresize(0, 0);
3050 redraw(0);
3051 xhints();
3052 }
3053
3054 void
3055 xinit(void) {
3056 XGCValues gcvalues;
3057 Cursor cursor;
3058 Window parent;
3059 pid_t thispid = getpid();
3060
3061 if(!(xw.dpy = XOpenDisplay(NULL)))
3062 die("Can't open display\n");
3063 xw.scr = XDefaultScreen(xw.dpy);
3064 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
3065
3066 /* font */
3067 if(!FcInit())
3068 die("Could not init fontconfig.\n");
3069
3070 usedfont = (opt_font == NULL)? font : opt_font;
3071 xloadfonts(usedfont, 0);
3072
3073 /* colors */
3074 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
3075 xloadcols();
3076
3077 /* adjust fixed window geometry */
3078 xw.w = 2 * borderpx + term.col * xw.cw;
3079 xw.h = 2 * borderpx + term.row * xw.ch;
3080 if(xw.gm & XNegative)
3081 xw.l += DisplayWidth(xw.dpy, xw.scr) - xw.w - 2;
3082 if(xw.gm & YNegative)
3083 xw.t += DisplayWidth(xw.dpy, xw.scr) - xw.h - 2;
3084
3085 /* Events */
3086 xw.attrs.background_pixel = dc.col[defaultbg].pixel;
3087 xw.attrs.border_pixel = dc.col[defaultbg].pixel;
3088 xw.attrs.bit_gravity = NorthWestGravity;
3089 xw.attrs.event_mask = FocusChangeMask | KeyPressMask
3090 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
3091 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
3092 xw.attrs.colormap = xw.cmap;
3093
3094 parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
3095 XRootWindow(xw.dpy, xw.scr);
3096 xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
3097 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
3098 xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
3099 | CWEventMask | CWColormap, &xw.attrs);
3100
3101 memset(&gcvalues, 0, sizeof(gcvalues));
3102 gcvalues.graphics_exposures = False;
3103 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
3104 &gcvalues);
3105 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
3106 DefaultDepth(xw.dpy, xw.scr));
3107 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
3108 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
3109
3110 /* Xft rendering context */
3111 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
3112
3113 /* input methods */
3114 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3115 XSetLocaleModifiers("@im=local");
3116 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3117 XSetLocaleModifiers("@im=");
3118 if((xw.xim = XOpenIM(xw.dpy,
3119 NULL, NULL, NULL)) == NULL) {
3120 die("XOpenIM failed. Could not open input"
3121 " device.\n");
3122 }
3123 }
3124 }
3125 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
3126 | XIMStatusNothing, XNClientWindow, xw.win,
3127 XNFocusWindow, xw.win, NULL);
3128 if(xw.xic == NULL)
3129 die("XCreateIC failed. Could not obtain input method.\n");
3130
3131 /* white cursor, black outline */
3132 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
3133 XDefineCursor(xw.dpy, xw.win, cursor);
3134 XRecolorCursor(xw.dpy, cursor,
3135 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
3136 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
3137
3138 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
3139 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
3140 xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
3141 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
3142
3143 xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
3144 XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
3145 PropModeReplace, (uchar *)&thispid, 1);
3146
3147 xresettitle();
3148 XMapWindow(xw.dpy, xw.win);
3149 xhints();
3150 XSync(xw.dpy, False);
3151 }
3152
3153 void
3154 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
3155 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
3156 width = charlen * xw.cw, xp, i;
3157 int frcflags;
3158 int u8fl, u8fblen, u8cblen, doesexist;
3159 char *u8c, *u8fs;
3160 long unicodep;
3161 Font *font = &dc.font;
3162 FcResult fcres;
3163 FcPattern *fcpattern, *fontpattern;
3164 FcFontSet *fcsets[] = { NULL };
3165 FcCharSet *fccharset;
3166 Color *fg, *bg, *temp, revfg, revbg, truefg, truebg;
3167 XRenderColor colfg, colbg;
3168 XRectangle r;
3169 int oneatatime;
3170
3171 frcflags = FRC_NORMAL;
3172
3173 if(base.mode & ATTR_ITALIC) {
3174 if(base.fg == defaultfg)
3175 base.fg = defaultitalic;
3176 font = &dc.ifont;
3177 frcflags = FRC_ITALIC;
3178 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
3179 if(base.fg == defaultfg)
3180 base.fg = defaultitalic;
3181 font = &dc.ibfont;
3182 frcflags = FRC_ITALICBOLD;
3183 } else if(base.mode & ATTR_UNDERLINE) {
3184 if(base.fg == defaultfg)
3185 base.fg = defaultunderline;
3186 }
3187
3188 if(IS_TRUECOL(base.fg)) {
3189 colfg.alpha = 0xffff;
3190 colfg.red = TRUERED(base.fg);
3191 colfg.green = TRUEGREEN(base.fg);
3192 colfg.blue = TRUEBLUE(base.fg);
3193 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
3194 fg = &truefg;
3195 } else {
3196 fg = &dc.col[base.fg];
3197 }
3198
3199 if(IS_TRUECOL(base.bg)) {
3200 colbg.alpha = 0xffff;
3201 colbg.green = TRUEGREEN(base.bg);
3202 colbg.red = TRUERED(base.bg);
3203 colbg.blue = TRUEBLUE(base.bg);
3204 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
3205 bg = &truebg;
3206 } else {
3207 bg = &dc.col[base.bg];
3208 }
3209
3210 if(base.mode & ATTR_BOLD) {
3211 /*
3212 * change basic system colors [0-7]
3213 * to bright system colors [8-15]
3214 */
3215 if(BETWEEN(base.fg, 0, 7) && !(base.mode & ATTR_FAINT))
3216 fg = &dc.col[base.fg + 8];
3217
3218 if(base.mode & ATTR_ITALIC) {
3219 font = &dc.ibfont;
3220 frcflags = FRC_ITALICBOLD;
3221 } else {
3222 font = &dc.bfont;
3223 frcflags = FRC_BOLD;
3224 }
3225 }
3226
3227 if(IS_SET(MODE_REVERSE)) {
3228 if(fg == &dc.col[defaultfg]) {
3229 fg = &dc.col[defaultbg];
3230 } else {
3231 colfg.red = ~fg->color.red;
3232 colfg.green = ~fg->color.green;
3233 colfg.blue = ~fg->color.blue;
3234 colfg.alpha = fg->color.alpha;
3235 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
3236 &revfg);
3237 fg = &revfg;
3238 }
3239
3240 if(bg == &dc.col[defaultbg]) {
3241 bg = &dc.col[defaultfg];
3242 } else {
3243 colbg.red = ~bg->color.red;
3244 colbg.green = ~bg->color.green;
3245 colbg.blue = ~bg->color.blue;
3246 colbg.alpha = bg->color.alpha;
3247 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
3248 &revbg);
3249 bg = &revbg;
3250 }
3251 }
3252
3253 if(base.mode & ATTR_REVERSE) {
3254 temp = fg;
3255 fg = bg;
3256 bg = temp;
3257 }
3258
3259 if(base.mode & ATTR_FAINT && !(base.mode & ATTR_BOLD)) {
3260 colfg.red = fg->color.red / 2;
3261 colfg.green = fg->color.green / 2;
3262 colfg.blue = fg->color.blue / 2;
3263 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
3264 fg = &revfg;
3265 }
3266
3267 if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
3268 fg = bg;
3269
3270 if(base.mode & ATTR_INVISIBLE)
3271 fg = bg;
3272
3273 /* Intelligent cleaning up of the borders. */
3274 if(x == 0) {
3275 xclear(0, (y == 0)? 0 : winy, borderpx,
3276 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
3277 }
3278 if(x + charlen >= term.col) {
3279 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
3280 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
3281 }
3282 if(y == 0)
3283 xclear(winx, 0, winx + width, borderpx);
3284 if(y == term.row-1)
3285 xclear(winx, winy + xw.ch, winx + width, xw.h);
3286
3287 /* Clean up the region we want to draw to. */
3288 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
3289
3290 /* Set the clip region because Xft is sometimes dirty. */
3291 r.x = 0;
3292 r.y = 0;
3293 r.height = xw.ch;
3294 r.width = width;
3295 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
3296
3297 for(xp = winx; bytelen > 0;) {
3298 /*
3299 * Search for the range in the to be printed string of glyphs
3300 * that are in the main font. Then print that range. If
3301 * some glyph is found that is not in the font, do the
3302 * fallback dance.
3303 */
3304 u8fs = s;
3305 u8fblen = 0;
3306 u8fl = 0;
3307 oneatatime = font->width != xw.cw;
3308 for(;;) {
3309 u8c = s;
3310 u8cblen = utf8decode(s, &unicodep, UTF_SIZ);
3311 s += u8cblen;
3312 bytelen -= u8cblen;
3313
3314 doesexist = XftCharExists(xw.dpy, font->match, unicodep);
3315 if(doesexist) {
3316 u8fl++;
3317 u8fblen += u8cblen;
3318 if(!oneatatime && bytelen > 0)
3319 continue;
3320 }
3321
3322 if(u8fl > 0) {
3323 XftDrawStringUtf8(xw.draw, fg,
3324 font->match, xp,
3325 winy + font->ascent,
3326 (FcChar8 *)u8fs,
3327 u8fblen);
3328 xp += xw.cw * u8fl;
3329 }
3330 break;
3331 }
3332 if(doesexist) {
3333 if(oneatatime)
3334 continue;
3335 break;
3336 }
3337
3338 /* Search the font cache. */
3339 for(i = 0; i < frclen; i++) {
3340 if(XftCharExists(xw.dpy, frc[i].font, unicodep)
3341 && frc[i].flags == frcflags) {
3342 break;
3343 }
3344 }
3345
3346 /* Nothing was found. */
3347 if(i >= frclen) {
3348 if(!font->set)
3349 xloadfontset(font);
3350 fcsets[0] = font->set;
3351
3352 /*
3353 * Nothing was found in the cache. Now use
3354 * some dozen of Fontconfig calls to get the
3355 * font for one single character.
3356 *
3357 * Xft and fontconfig are design failures.
3358 */
3359 fcpattern = FcPatternDuplicate(font->pattern);
3360 fccharset = FcCharSetCreate();
3361
3362 FcCharSetAddChar(fccharset, unicodep);
3363 FcPatternAddCharSet(fcpattern, FC_CHARSET,
3364 fccharset);
3365 FcPatternAddBool(fcpattern, FC_SCALABLE,
3366 FcTrue);
3367
3368 FcConfigSubstitute(0, fcpattern,
3369 FcMatchPattern);
3370 FcDefaultSubstitute(fcpattern);
3371
3372 fontpattern = FcFontSetMatch(0, fcsets,
3373 FcTrue, fcpattern, &fcres);
3374
3375 /*
3376 * Overwrite or create the new cache entry.
3377 */
3378 if(frclen >= LEN(frc)) {
3379 frclen = LEN(frc) - 1;
3380 XftFontClose(xw.dpy, frc[frclen].font);
3381 }
3382
3383 frc[frclen].font = XftFontOpenPattern(xw.dpy,
3384 fontpattern);
3385 frc[frclen].flags = frcflags;
3386
3387 i = frclen;
3388 frclen++;
3389
3390 FcPatternDestroy(fcpattern);
3391 FcCharSetDestroy(fccharset);
3392 }
3393
3394 XftDrawStringUtf8(xw.draw, fg, frc[i].font,
3395 xp, winy + frc[i].font->ascent,
3396 (FcChar8 *)u8c, u8cblen);
3397
3398 xp += xw.cw * wcwidth(unicodep);
3399 }
3400
3401 /*
3402 * This is how the loop above actually should be. Why does the
3403 * application have to care about font details?
3404 *
3405 * I have to repeat: Xft and Fontconfig are design failures.
3406 */
3407 /*
3408 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
3409 winy + font->ascent, (FcChar8 *)s, bytelen);
3410 */
3411
3412 if(base.mode & ATTR_UNDERLINE) {
3413 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
3414 width, 1);
3415 }
3416
3417 if(base.mode & ATTR_STRUCK) {
3418 XftDrawRect(xw.draw, fg, winx, winy + 2 * font->ascent / 3,
3419 width, 1);
3420 }
3421
3422 /* Reset clip to none. */
3423 XftDrawSetClip(xw.draw, 0);
3424 }
3425
3426 void
3427 xdrawcursor(void) {
3428 static int oldx = 0, oldy = 0;
3429 int sl, width, curx;
3430 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
3431
3432 LIMIT(oldx, 0, term.col-1);
3433 LIMIT(oldy, 0, term.row-1);
3434
3435 curx = term.c.x;
3436
3437 /* adjust position if in dummy */
3438 if(term.line[oldy][oldx].mode & ATTR_WDUMMY)
3439 oldx--;
3440 if(term.line[term.c.y][curx].mode & ATTR_WDUMMY)
3441 curx--;
3442
3443 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
3444
3445 /* remove the old cursor */
3446 sl = utf8len(term.line[oldy][oldx].c);
3447 width = (term.line[oldy][oldx].mode & ATTR_WIDE)? 2 : 1;
3448 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
3449 oldy, width, sl);
3450
3451 /* draw the new one */
3452 if(!(IS_SET(MODE_HIDE))) {
3453 if(xw.state & WIN_FOCUSED) {
3454 if(IS_SET(MODE_REVERSE)) {
3455 g.mode |= ATTR_REVERSE;
3456 g.fg = defaultcs;
3457 g.bg = defaultfg;
3458 }
3459
3460 sl = utf8len(g.c);
3461 width = (term.line[term.c.y][curx].mode & ATTR_WIDE)\
3462 ? 2 : 1;
3463 xdraws(g.c, g, term.c.x, term.c.y, width, sl);
3464 } else {
3465 XftDrawRect(xw.draw, &dc.col[defaultcs],
3466 borderpx + curx * xw.cw,
3467 borderpx + term.c.y * xw.ch,
3468 xw.cw - 1, 1);
3469 XftDrawRect(xw.draw, &dc.col[defaultcs],
3470 borderpx + curx * xw.cw,
3471 borderpx + term.c.y * xw.ch,
3472 1, xw.ch - 1);
3473 XftDrawRect(xw.draw, &dc.col[defaultcs],
3474 borderpx + (curx + 1) * xw.cw - 1,
3475 borderpx + term.c.y * xw.ch,
3476 1, xw.ch - 1);
3477 XftDrawRect(xw.draw, &dc.col[defaultcs],
3478 borderpx + curx * xw.cw,
3479 borderpx + (term.c.y + 1) * xw.ch - 1,
3480 xw.cw, 1);
3481 }
3482 oldx = curx, oldy = term.c.y;
3483 }
3484 }
3485
3486
3487 void
3488 xsettitle(char *p) {
3489 XTextProperty prop;
3490
3491 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3492 &prop);
3493 XSetWMName(xw.dpy, xw.win, &prop);
3494 XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
3495 XFree(prop.value);
3496 }
3497
3498 void
3499 xresettitle(void) {
3500 xsettitle(opt_title ? opt_title : "st");
3501 }
3502
3503 void
3504 redraw(int timeout) {
3505 struct timespec tv = {0, timeout * 1000};
3506
3507 tfulldirt();
3508 draw();
3509
3510 if(timeout > 0) {
3511 nanosleep(&tv, NULL);
3512 XSync(xw.dpy, False); /* necessary for a good tput flash */
3513 }
3514 }
3515
3516 void
3517 draw(void) {
3518 drawregion(0, 0, term.col, term.row);
3519 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3520 xw.h, 0, 0);
3521 XSetForeground(xw.dpy, dc.gc,
3522 dc.col[IS_SET(MODE_REVERSE)?
3523 defaultfg : defaultbg].pixel);
3524 }
3525
3526 void
3527 drawregion(int x1, int y1, int x2, int y2) {
3528 int ic, ib, x, y, ox, sl;
3529 Glyph base, new;
3530 char buf[DRAW_BUF_SIZ];
3531 bool ena_sel = sel.ob.x != -1 && sel.alt == IS_SET(MODE_ALTSCREEN);
3532 long unicodep;
3533
3534 if(!(xw.state & WIN_VISIBLE))
3535 return;
3536
3537 for(y = y1; y < y2; y++) {
3538 if(!term.dirty[y])
3539 continue;
3540
3541 xtermclear(0, y, term.col, y);
3542 term.dirty[y] = 0;
3543 base = term.line[y][0];
3544 ic = ib = ox = 0;
3545 for(x = x1; x < x2; x++) {
3546 new = term.line[y][x];
3547 if(new.mode == ATTR_WDUMMY)
3548 continue;
3549 if(ena_sel && selected(x, y))
3550 new.mode ^= ATTR_REVERSE;
3551 if(ib > 0 && (ATTRCMP(base, new)
3552 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3553 xdraws(buf, base, ox, y, ic, ib);
3554 ic = ib = 0;
3555 }
3556 if(ib == 0) {
3557 ox = x;
3558 base = new;
3559 }
3560
3561 sl = utf8decode(new.c, &unicodep, UTF_SIZ);
3562 memcpy(buf+ib, new.c, sl);
3563 ib += sl;
3564 ic += (new.mode & ATTR_WIDE)? 2 : 1;
3565 }
3566 if(ib > 0)
3567 xdraws(buf, base, ox, y, ic, ib);
3568 }
3569 xdrawcursor();
3570 }
3571
3572 void
3573 expose(XEvent *ev) {
3574 XExposeEvent *e = &ev->xexpose;
3575
3576 if(xw.state & WIN_REDRAW) {
3577 if(!e->count)
3578 xw.state &= ~WIN_REDRAW;
3579 }
3580 redraw(0);
3581 }
3582
3583 void
3584 visibility(XEvent *ev) {
3585 XVisibilityEvent *e = &ev->xvisibility;
3586
3587 if(e->state == VisibilityFullyObscured) {
3588 xw.state &= ~WIN_VISIBLE;
3589 } else if(!(xw.state & WIN_VISIBLE)) {
3590 /* need a full redraw for next Expose, not just a buf copy */
3591 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3592 }
3593 }
3594
3595 void
3596 unmap(XEvent *ev) {
3597 xw.state &= ~WIN_VISIBLE;
3598 }
3599
3600 void
3601 xsetpointermotion(int set) {
3602 MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
3603 XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
3604 }
3605
3606 void
3607 xseturgency(int add) {
3608 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3609
3610 MODBIT(h->flags, add, XUrgencyHint);
3611 XSetWMHints(xw.dpy, xw.win, h);
3612 XFree(h);
3613 }
3614
3615 void
3616 focus(XEvent *ev) {
3617 XFocusChangeEvent *e = &ev->xfocus;
3618
3619 if(e->mode == NotifyGrab)
3620 return;
3621
3622 if(ev->type == FocusIn) {
3623 XSetICFocus(xw.xic);
3624 xw.state |= WIN_FOCUSED;
3625 xseturgency(0);
3626 if(IS_SET(MODE_FOCUS))
3627 ttywrite("\033[I", 3);
3628 } else {
3629 XUnsetICFocus(xw.xic);
3630 xw.state &= ~WIN_FOCUSED;
3631 if(IS_SET(MODE_FOCUS))
3632 ttywrite("\033[O", 3);
3633 }
3634 }
3635
3636 static inline bool
3637 match(uint mask, uint state) {
3638 return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
3639 }
3640
3641 void
3642 numlock(const Arg *dummy) {
3643 term.numlock ^= 1;
3644 }
3645
3646 char*
3647 kmap(KeySym k, uint state) {
3648 Key *kp;
3649 int i;
3650
3651 /* Check for mapped keys out of X11 function keys. */
3652 for(i = 0; i < LEN(mappedkeys); i++) {
3653 if(mappedkeys[i] == k)
3654 break;
3655 }
3656 if(i == LEN(mappedkeys)) {
3657 if((k & 0xFFFF) < 0xFD00)
3658 return NULL;
3659 }
3660
3661 for(kp = key; kp < key + LEN(key); kp++) {
3662 if(kp->k != k)
3663 continue;
3664
3665 if(!match(kp->mask, state))
3666 continue;
3667
3668 if(IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
3669 continue;
3670 if(term.numlock && kp->appkey == 2)
3671 continue;
3672
3673 if(IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
3674 continue;
3675
3676 if(IS_SET(MODE_CRLF) ? kp->crlf < 0 : kp->crlf > 0)
3677 continue;
3678
3679 return kp->s;
3680 }
3681
3682 return NULL;
3683 }
3684
3685 void
3686 kpress(XEvent *ev) {
3687 XKeyEvent *e = &ev->xkey;
3688 KeySym ksym;
3689 char buf[32], *customkey;
3690 int len;
3691 long c;
3692 Status status;
3693 Shortcut *bp;
3694
3695 if(IS_SET(MODE_KBDLOCK))
3696 return;
3697
3698 len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
3699 /* 1. shortcuts */
3700 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3701 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3702 bp->func(&(bp->arg));
3703 return;
3704 }
3705 }
3706
3707 /* 2. custom keys from config.h */
3708 if((customkey = kmap(ksym, e->state))) {
3709 ttysend(customkey, strlen(customkey));
3710 return;
3711 }
3712
3713 /* 3. composed string from input method */
3714 if(len == 0)
3715 return;
3716 if(len == 1 && e->state & Mod1Mask) {
3717 if(IS_SET(MODE_8BIT)) {
3718 if(*buf < 0177) {
3719 c = *buf | 0x80;
3720 len = utf8encode(c, buf, UTF_SIZ);
3721 }
3722 } else {
3723 buf[1] = buf[0];
3724 buf[0] = '\033';
3725 len = 2;
3726 }
3727 }
3728 ttysend(buf, len);
3729 }
3730
3731
3732 void
3733 cmessage(XEvent *e) {
3734 /*
3735 * See xembed specs
3736 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3737 */
3738 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3739 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3740 xw.state |= WIN_FOCUSED;
3741 xseturgency(0);
3742 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3743 xw.state &= ~WIN_FOCUSED;
3744 }
3745 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3746 /* Send SIGHUP to shell */
3747 kill(pid, SIGHUP);
3748 exit(EXIT_SUCCESS);
3749 }
3750 }
3751
3752 void
3753 cresize(int width, int height) {
3754 int col, row;
3755
3756 if(width != 0)
3757 xw.w = width;
3758 if(height != 0)
3759 xw.h = height;
3760
3761 col = (xw.w - 2 * borderpx) / xw.cw;
3762 row = (xw.h - 2 * borderpx) / xw.ch;
3763
3764 tresize(col, row);
3765 xresize(col, row);
3766 ttyresize();
3767 }
3768
3769 void
3770 resize(XEvent *e) {
3771 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3772 return;
3773
3774 cresize(e->xconfigure.width, e->xconfigure.height);
3775 }
3776
3777 void
3778 run(void) {
3779 XEvent ev;
3780 int w = xw.w, h = xw.h;
3781 fd_set rfd;
3782 int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3783 struct timespec drawtimeout, *tv = NULL, now, last, lastblink;
3784 long deltatime;
3785
3786 /* Waiting for window mapping */
3787 while(1) {
3788 XNextEvent(xw.dpy, &ev);
3789 if(XFilterEvent(&ev, None))
3790 continue;
3791 if(ev.type == ConfigureNotify) {
3792 w = ev.xconfigure.width;
3793 h = ev.xconfigure.height;
3794 } else if(ev.type == MapNotify) {
3795 break;
3796 }
3797 }
3798
3799 ttynew();
3800 cresize(w, h);
3801
3802 clock_gettime(CLOCK_MONOTONIC, &last);
3803 lastblink = last;
3804
3805 for(xev = actionfps;;) {
3806 FD_ZERO(&rfd);
3807 FD_SET(cmdfd, &rfd);
3808 FD_SET(xfd, &rfd);
3809
3810 if(pselect(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv, NULL) < 0) {
3811 if(errno == EINTR)
3812 continue;
3813 die("select failed: %s\n", strerror(errno));
3814 }
3815 if(FD_ISSET(cmdfd, &rfd)) {
3816 ttyread();
3817 if(blinktimeout) {
3818 blinkset = tattrset(ATTR_BLINK);
3819 if(!blinkset)
3820 MODBIT(term.mode, 0, MODE_BLINK);
3821 }
3822 }
3823
3824 if(FD_ISSET(xfd, &rfd))
3825 xev = actionfps;
3826
3827 clock_gettime(CLOCK_MONOTONIC, &now);
3828 drawtimeout.tv_sec = 0;
3829 drawtimeout.tv_nsec = (1000/xfps) * 1E6;
3830 tv = &drawtimeout;
3831
3832 dodraw = 0;
3833 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
3834 tsetdirtattr(ATTR_BLINK);
3835 term.mode ^= MODE_BLINK;
3836 lastblink = now;
3837 dodraw = 1;
3838 }
3839 deltatime = TIMEDIFF(now, last);
3840 if(deltatime > (xev? (1000/xfps) : (1000/actionfps))
3841 || deltatime < 0) {
3842 dodraw = 1;
3843 last = now;
3844 }
3845
3846 if(dodraw) {
3847 while(XPending(xw.dpy)) {
3848 XNextEvent(xw.dpy, &ev);
3849 if(XFilterEvent(&ev, None))
3850 continue;
3851 if(handler[ev.type])
3852 (handler[ev.type])(&ev);
3853 }
3854
3855 draw();
3856 XFlush(xw.dpy);
3857
3858 if(xev && !FD_ISSET(xfd, &rfd))
3859 xev--;
3860 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
3861 if(blinkset) {
3862 if(TIMEDIFF(now, lastblink) \
3863 > blinktimeout) {
3864 drawtimeout.tv_nsec = 1000;
3865 } else {
3866 drawtimeout.tv_nsec = (1E6 * \
3867 (blinktimeout - \
3868 TIMEDIFF(now,
3869 lastblink)));
3870 }
3871 } else {
3872 tv = NULL;
3873 }
3874 }
3875 }
3876 }
3877 }
3878
3879 void
3880 usage(void) {
3881 die("%s " VERSION " (c) 2010-2014 st engineers\n" \
3882 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]" \
3883 " [-t title] [-w windowid] [-e command ...]\n", argv0);
3884 }
3885
3886 int
3887 main(int argc, char *argv[]) {
3888 char *titles;
3889 uint cols = 80, rows = 24;
3890
3891 xw.l = xw.t = 0;
3892 xw.isfixed = False;
3893
3894 ARGBEGIN {
3895 case 'a':
3896 allowaltscreen = false;
3897 break;
3898 case 'c':
3899 opt_class = EARGF(usage());
3900 break;
3901 case 'e':
3902 /* eat all remaining arguments */
3903 if(argc > 1) {
3904 opt_cmd = &argv[1];
3905 if(argv[1] != NULL && opt_title == NULL) {
3906 titles = xstrdup(argv[1]);
3907 opt_title = basename(titles);
3908 }
3909 }
3910 goto run;
3911 case 'f':
3912 opt_font = EARGF(usage());
3913 break;
3914 case 'g':
3915 xw.gm = XParseGeometry(EARGF(usage()),
3916 &xw.l, &xw.t, &cols, &rows);
3917 break;
3918 case 'i':
3919 xw.isfixed = True;
3920 break;
3921 case 'o':
3922 opt_io = EARGF(usage());
3923 break;
3924 case 't':
3925 opt_title = EARGF(usage());
3926 break;
3927 case 'w':
3928 opt_embed = EARGF(usage());
3929 break;
3930 case 'v':
3931 default:
3932 usage();
3933 } ARGEND;
3934
3935 run:
3936 setlocale(LC_CTYPE, "");
3937 XSetLocaleModifiers("");
3938 tnew(cols? cols : 1, rows? rows : 1);
3939 xinit();
3940 selinit();
3941 run();
3942
3943 return 0;
3944 }
3945