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[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 <X11/XKBlib.h>
31 #include <fontconfig/fontconfig.h>
32 #include <wchar.h>
33
34 #include "arg.h"
35
36 char *argv0;
37
38 #define Glyph Glyph_
39 #define Font Font_
40
41 #if defined(__linux)
42 #include <pty.h>
43 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
44 #include <util.h>
45 #elif defined(__FreeBSD__) || defined(__DragonFly__)
46 #include <libutil.h>
47 #endif
48
49
50 /* XEMBED messages */
51 #define XEMBED_FOCUS_IN 4
52 #define XEMBED_FOCUS_OUT 5
53
54 /* Arbitrary sizes */
55 #define UTF_INVALID 0xFFFD
56 #define UTF_SIZ 4
57 #define ESC_BUF_SIZ (128*UTF_SIZ)
58 #define ESC_ARG_SIZ 16
59 #define STR_BUF_SIZ ESC_BUF_SIZ
60 #define STR_ARG_SIZ ESC_ARG_SIZ
61 #define DRAW_BUF_SIZ 20*1024
62 #define XK_ANY_MOD UINT_MAX
63 #define XK_NO_MOD 0
64 #define XK_SWITCH_MOD (1<<13)
65
66 #define REDRAW_TIMEOUT (80*1000) /* 80 ms */
67
68 /* macros */
69 #define MIN(a, b) ((a) < (b) ? (a) : (b))
70 #define MAX(a, b) ((a) < (b) ? (b) : (a))
71 #define LEN(a) (sizeof(a) / sizeof(a)[0])
72 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
73 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
74 #define ISCONTROLC0(c) (BETWEEN(c, 0, 0x1f) || (c) == '\177')
75 #define ISCONTROLC1(c) (BETWEEN(c, 0x80, 0x9f))
76 #define ISCONTROL(c) (ISCONTROLC0(c) || ISCONTROLC1(c))
77 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
78 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
79 #define IS_SET(flag) ((term.mode & (flag)) != 0)
80 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_nsec-t2.tv_nsec)/1E6)
81 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
82
83 #define TRUECOLOR(r,g,b) (1 << 24 | (r) << 16 | (g) << 8 | (b))
84 #define IS_TRUECOL(x) (1 << 24 & (x))
85 #define TRUERED(x) (((x) & 0xff0000) >> 8)
86 #define TRUEGREEN(x) (((x) & 0xff00))
87 #define TRUEBLUE(x) (((x) & 0xff) << 8)
88
89
90 enum glyph_attribute {
91 ATTR_NULL = 0,
92 ATTR_BOLD = 1 << 0,
93 ATTR_FAINT = 1 << 1,
94 ATTR_ITALIC = 1 << 2,
95 ATTR_UNDERLINE = 1 << 3,
96 ATTR_BLINK = 1 << 4,
97 ATTR_REVERSE = 1 << 5,
98 ATTR_INVISIBLE = 1 << 6,
99 ATTR_STRUCK = 1 << 7,
100 ATTR_WRAP = 1 << 8,
101 ATTR_WIDE = 1 << 9,
102 ATTR_WDUMMY = 1 << 10,
103 };
104
105 enum cursor_movement {
106 CURSOR_SAVE,
107 CURSOR_LOAD
108 };
109
110 enum cursor_state {
111 CURSOR_DEFAULT = 0,
112 CURSOR_WRAPNEXT = 1,
113 CURSOR_ORIGIN = 2
114 };
115
116 enum term_mode {
117 MODE_WRAP = 1 << 0,
118 MODE_INSERT = 1 << 1,
119 MODE_APPKEYPAD = 1 << 2,
120 MODE_ALTSCREEN = 1 << 3,
121 MODE_CRLF = 1 << 4,
122 MODE_MOUSEBTN = 1 << 5,
123 MODE_MOUSEMOTION = 1 << 6,
124 MODE_REVERSE = 1 << 7,
125 MODE_KBDLOCK = 1 << 8,
126 MODE_HIDE = 1 << 9,
127 MODE_ECHO = 1 << 10,
128 MODE_APPCURSOR = 1 << 11,
129 MODE_MOUSESGR = 1 << 12,
130 MODE_8BIT = 1 << 13,
131 MODE_BLINK = 1 << 14,
132 MODE_FBLINK = 1 << 15,
133 MODE_FOCUS = 1 << 16,
134 MODE_MOUSEX10 = 1 << 17,
135 MODE_MOUSEMANY = 1 << 18,
136 MODE_BRCKTPASTE = 1 << 19,
137 MODE_PRINT = 1 << 20,
138 MODE_MOUSE = MODE_MOUSEBTN|MODE_MOUSEMOTION|MODE_MOUSEX10\
139 |MODE_MOUSEMANY,
140 };
141
142 enum charset {
143 CS_GRAPHIC0,
144 CS_GRAPHIC1,
145 CS_UK,
146 CS_USA,
147 CS_MULTI,
148 CS_GER,
149 CS_FIN
150 };
151
152 enum escape_state {
153 ESC_START = 1,
154 ESC_CSI = 2,
155 ESC_STR = 4, /* DCS, OSC, PM, APC */
156 ESC_ALTCHARSET = 8,
157 ESC_STR_END = 16, /* a final string was encountered */
158 ESC_TEST = 32, /* Enter in test mode */
159 };
160
161 enum window_state {
162 WIN_VISIBLE = 1,
163 WIN_REDRAW = 2,
164 WIN_FOCUSED = 4
165 };
166
167 enum selection_type {
168 SEL_REGULAR = 1,
169 SEL_RECTANGULAR = 2
170 };
171
172 enum selection_snap {
173 SNAP_WORD = 1,
174 SNAP_LINE = 2
175 };
176
177 typedef unsigned char uchar;
178 typedef unsigned int uint;
179 typedef unsigned long ulong;
180 typedef unsigned short ushort;
181
182 typedef XftDraw *Draw;
183 typedef XftColor Color;
184
185 typedef struct {
186 char c[UTF_SIZ]; /* character code */
187 ushort mode; /* attribute flags */
188 uint32_t fg; /* foreground */
189 uint32_t bg; /* background */
190 } Glyph;
191
192 typedef Glyph *Line;
193
194 typedef struct {
195 Glyph attr; /* current char attributes */
196 int x;
197 int y;
198 char state;
199 } TCursor;
200
201 /* CSI Escape sequence structs */
202 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
203 typedef struct {
204 char buf[ESC_BUF_SIZ]; /* raw string */
205 int len; /* raw string length */
206 char priv;
207 int arg[ESC_ARG_SIZ];
208 int narg; /* nb of args */
209 char mode;
210 } CSIEscape;
211
212 /* STR Escape sequence structs */
213 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
214 typedef struct {
215 char type; /* ESC type ... */
216 char buf[STR_BUF_SIZ]; /* raw string */
217 int len; /* raw string length */
218 char *args[STR_ARG_SIZ];
219 int narg; /* nb of args */
220 } STREscape;
221
222 /* Internal representation of the screen */
223 typedef struct {
224 int row; /* nb row */
225 int col; /* nb col */
226 Line *line; /* screen */
227 Line *alt; /* alternate screen */
228 bool *dirty; /* dirtyness of lines */
229 TCursor c; /* cursor */
230 int top; /* top scroll limit */
231 int bot; /* bottom scroll limit */
232 int mode; /* terminal mode flags */
233 int esc; /* escape state flags */
234 char trantbl[4]; /* charset table translation */
235 int charset; /* current charset */
236 int icharset; /* selected charset for sequence */
237 bool numlock; /* lock numbers in keyboard */
238 bool *tabs;
239 } Term;
240
241 /* Purely graphic info */
242 typedef struct {
243 Display *dpy;
244 Colormap cmap;
245 Window win;
246 Drawable buf;
247 Atom xembed, wmdeletewin, netwmname, netwmpid;
248 XIM xim;
249 XIC xic;
250 Draw draw;
251 Visual *vis;
252 XSetWindowAttributes attrs;
253 int scr;
254 bool isfixed; /* is fixed geometry? */
255 int l, t; /* left and top offset */
256 int gm; /* geometry mask */
257 int tw, th; /* tty width and height */
258 int w, h; /* window width and height */
259 int ch; /* char height */
260 int cw; /* char width */
261 char state; /* focus, redraw, visible */
262 } XWindow;
263
264 typedef struct {
265 uint b;
266 uint mask;
267 char *s;
268 } Mousekey;
269
270 typedef struct {
271 KeySym k;
272 uint mask;
273 char *s;
274 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
275 signed char appkey; /* application keypad */
276 signed char appcursor; /* application cursor */
277 signed char crlf; /* crlf mode */
278 } Key;
279
280 typedef struct {
281 int mode;
282 int type;
283 int snap;
284 /*
285 * Selection variables:
286 * nb – normalized coordinates of the beginning of the selection
287 * ne – normalized coordinates of the end of the selection
288 * ob – original coordinates of the beginning of the selection
289 * oe – original coordinates of the end of the selection
290 */
291 struct {
292 int x, y;
293 } nb, ne, ob, oe;
294
295 char *clip;
296 Atom xtarget;
297 bool alt;
298 struct timespec tclick1;
299 struct timespec tclick2;
300 } Selection;
301
302 typedef union {
303 int i;
304 uint ui;
305 float f;
306 const void *v;
307 } Arg;
308
309 typedef struct {
310 uint mod;
311 KeySym keysym;
312 void (*func)(const Arg *);
313 const Arg arg;
314 } Shortcut;
315
316 /* function definitions used in config.h */
317 static void clippaste(const Arg *);
318 static void numlock(const Arg *);
319 static void selpaste(const Arg *);
320 static void xzoom(const Arg *);
321 static void xzoomabs(const Arg *);
322 static void xzoomreset(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 int eschandle(uchar ascii);
363 static void strdump(void);
364 static void strhandle(void);
365 static void strparse(void);
366 static void strreset(void);
367
368 static int tattrset(int);
369 static void tprinter(char *, size_t);
370 static void tdumpsel(void);
371 static void tdumpline(int);
372 static void tdump(void);
373 static void tclearregion(int, int, int, int);
374 static void tcursor(int);
375 static void tdeletechar(int);
376 static void tdeleteline(int);
377 static void tinsertblank(int);
378 static void tinsertblankline(int);
379 static int tlinelen(int);
380 static void tmoveto(int, int);
381 static void tmoveato(int, int);
382 static void tnew(int, int);
383 static void tnewline(int);
384 static void tputtab(int);
385 static void tputc(char *, int);
386 static void treset(void);
387 static void tresize(int, int);
388 static void tscrollup(int, int);
389 static void tscrolldown(int, int);
390 static void tsetattr(int *, int);
391 static void tsetchar(char *, Glyph *, int, int);
392 static void tsetscroll(int, int);
393 static void tswapscreen(void);
394 static void tsetdirt(int, int);
395 static void tsetdirtattr(int);
396 static void tsetmode(bool, bool, int *, int);
397 static void tfulldirt(void);
398 static void techo(char *, int);
399 static void tcontrolcode(uchar );
400 static void tdectest(char );
401 static int32_t tdefcolor(int *, int *, int);
402 static void tdeftran(char);
403 static inline bool match(uint, uint);
404 static void ttynew(void);
405 static void ttyread(void);
406 static void ttyresize(void);
407 static void ttysend(char *, size_t);
408 static void ttywrite(const char *, size_t);
409 static void tstrsequence(uchar c);
410
411 static void xdraws(char *, Glyph, int, int, int, int);
412 static void xhints(void);
413 static void xclear(int, int, int, int);
414 static void xdrawcursor(void);
415 static void xinit(void);
416 static void xloadcols(void);
417 static int xsetcolorname(int, const char *);
418 static int xgeommasktogravity(int);
419 static int xloadfont(Font *, FcPattern *);
420 static void xloadfonts(char *, double);
421 static int xloadfontset(Font *);
422 static void xsettitle(char *);
423 static void xresettitle(void);
424 static void xsetpointermotion(int);
425 static void xseturgency(int);
426 static void xsetsel(char *);
427 static void xtermclear(int, int, int, int);
428 static void xunloadfont(Font *);
429 static void xunloadfonts(void);
430 static void xresize(int, int);
431
432 static void expose(XEvent *);
433 static void visibility(XEvent *);
434 static void unmap(XEvent *);
435 static char *kmap(KeySym, uint);
436 static void kpress(XEvent *);
437 static void cmessage(XEvent *);
438 static void cresize(int, int);
439 static void resize(XEvent *);
440 static void focus(XEvent *);
441 static void brelease(XEvent *);
442 static void bpress(XEvent *);
443 static void bmotion(XEvent *);
444 static void selnotify(XEvent *);
445 static void selclear(XEvent *);
446 static void selrequest(XEvent *);
447
448 static void selinit(void);
449 static void selnormalize(void);
450 static inline bool selected(int, int);
451 static char *getsel(void);
452 static void selcopy(void);
453 static void selscroll(int, int);
454 static void selsnap(int, int *, int *, int);
455 static void getbuttoninfo(XEvent *);
456 static void mousereport(XEvent *);
457
458 static size_t utf8decode(char *, long *, size_t);
459 static long utf8decodebyte(char, size_t *);
460 static size_t utf8encode(long, char *, size_t);
461 static char utf8encodebyte(long, size_t);
462 static size_t utf8len(char *);
463 static size_t utf8validate(long *, size_t);
464
465 static ssize_t xwrite(int, const char *, size_t);
466 static void *xmalloc(size_t);
467 static void *xrealloc(void *, size_t);
468 static char *xstrdup(char *);
469
470 static void usage(void);
471
472 static void (*handler[LASTEvent])(XEvent *) = {
473 [KeyPress] = kpress,
474 [ClientMessage] = cmessage,
475 [ConfigureNotify] = resize,
476 [VisibilityNotify] = visibility,
477 [UnmapNotify] = unmap,
478 [Expose] = expose,
479 [FocusIn] = focus,
480 [FocusOut] = focus,
481 [MotionNotify] = bmotion,
482 [ButtonPress] = bpress,
483 [ButtonRelease] = brelease,
484 [SelectionClear] = selclear,
485 [SelectionNotify] = selnotify,
486 [SelectionRequest] = selrequest,
487 };
488
489 /* Globals */
490 static DC dc;
491 static XWindow xw;
492 static Term term;
493 static CSIEscape csiescseq;
494 static STREscape strescseq;
495 static int cmdfd;
496 static pid_t pid;
497 static Selection sel;
498 static int iofd = STDOUT_FILENO;
499 static char **opt_cmd = NULL;
500 static char *opt_io = NULL;
501 static char *opt_title = NULL;
502 static char *opt_embed = NULL;
503 static char *opt_class = NULL;
504 static char *opt_font = NULL;
505 static int oldbutton = 3; /* button event on startup: 3 = release */
506
507 static char *usedfont = NULL;
508 static double usedfontsize = 0;
509 static double defaultfontsize = 0;
510
511 static uchar utfbyte[UTF_SIZ + 1] = {0x80, 0, 0xC0, 0xE0, 0xF0};
512 static uchar utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
513 static long utfmin[UTF_SIZ + 1] = { 0, 0, 0x80, 0x800, 0x10000};
514 static long utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
515
516 /* Font Ring Cache */
517 enum {
518 FRC_NORMAL,
519 FRC_ITALIC,
520 FRC_BOLD,
521 FRC_ITALICBOLD
522 };
523
524 typedef struct {
525 XftFont *font;
526 int flags;
527 } Fontcache;
528
529 /* Fontcache is an array now. A new font will be appended to the array. */
530 static Fontcache frc[16];
531 static int frclen = 0;
532
533 ssize_t
534 xwrite(int fd, const char *s, size_t len) {
535 size_t aux = len;
536
537 while(len > 0) {
538 ssize_t r = write(fd, s, len);
539 if(r < 0)
540 return r;
541 len -= r;
542 s += r;
543 }
544 return aux;
545 }
546
547 void *
548 xmalloc(size_t len) {
549 void *p = malloc(len);
550
551 if(!p)
552 die("Out of memory\n");
553
554 return p;
555 }
556
557 void *
558 xrealloc(void *p, size_t len) {
559 if((p = realloc(p, len)) == NULL)
560 die("Out of memory\n");
561
562 return p;
563 }
564
565 char *
566 xstrdup(char *s) {
567 if((s = strdup(s)) == NULL)
568 die("Out of memory\n");
569
570 return s;
571 }
572
573 size_t
574 utf8decode(char *c, long *u, size_t clen) {
575 size_t i, j, len, type;
576 long udecoded;
577
578 *u = UTF_INVALID;
579 if(!clen)
580 return 0;
581 udecoded = utf8decodebyte(c[0], &len);
582 if(!BETWEEN(len, 1, UTF_SIZ))
583 return 1;
584 for(i = 1, j = 1; i < clen && j < len; ++i, ++j) {
585 udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
586 if(type != 0)
587 return j;
588 }
589 if(j < len)
590 return 0;
591 *u = udecoded;
592 utf8validate(u, len);
593 return len;
594 }
595
596 long
597 utf8decodebyte(char c, size_t *i) {
598 for(*i = 0; *i < LEN(utfmask); ++(*i))
599 if(((uchar)c & utfmask[*i]) == utfbyte[*i])
600 return (uchar)c & ~utfmask[*i];
601 return 0;
602 }
603
604 size_t
605 utf8encode(long u, char *c, size_t clen) {
606 size_t len, i;
607
608 len = utf8validate(&u, 0);
609 if(clen < len)
610 return 0;
611 for(i = len - 1; i != 0; --i) {
612 c[i] = utf8encodebyte(u, 0);
613 u >>= 6;
614 }
615 c[0] = utf8encodebyte(u, len);
616 return len;
617 }
618
619 char
620 utf8encodebyte(long u, size_t i) {
621 return utfbyte[i] | (u & ~utfmask[i]);
622 }
623
624 size_t
625 utf8len(char *c) {
626 return utf8decode(c, &(long){0}, UTF_SIZ);
627 }
628
629 size_t
630 utf8validate(long *u, size_t i) {
631 if(!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF))
632 *u = UTF_INVALID;
633 for(i = 1; *u > utfmax[i]; ++i)
634 ;
635 return i;
636 }
637
638 static void
639 selinit(void) {
640 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
641 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
642 sel.mode = 0;
643 sel.ob.x = -1;
644 sel.clip = NULL;
645 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
646 if(sel.xtarget == None)
647 sel.xtarget = XA_STRING;
648 }
649
650 static int
651 x2col(int x) {
652 x -= borderpx;
653 x /= xw.cw;
654
655 return LIMIT(x, 0, term.col-1);
656 }
657
658 static int
659 y2row(int y) {
660 y -= borderpx;
661 y /= xw.ch;
662
663 return LIMIT(y, 0, term.row-1);
664 }
665
666 static int tlinelen(int y) {
667 int i = term.col;
668
669 if(term.line[y][i - 1].mode & ATTR_WRAP)
670 return i;
671
672 while(i > 0 && term.line[y][i - 1].c[0] == ' ')
673 --i;
674
675 return i;
676 }
677
678 static void
679 selnormalize(void) {
680 int i;
681
682 if(sel.ob.y == sel.oe.y || sel.type == SEL_RECTANGULAR) {
683 sel.nb.x = MIN(sel.ob.x, sel.oe.x);
684 sel.ne.x = MAX(sel.ob.x, sel.oe.x);
685 } else {
686 sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
687 sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
688 }
689 sel.nb.y = MIN(sel.ob.y, sel.oe.y);
690 sel.ne.y = MAX(sel.ob.y, sel.oe.y);
691
692 selsnap(sel.snap, &sel.nb.x, &sel.nb.y, -1);
693 selsnap(sel.snap, &sel.ne.x, &sel.ne.y, +1);
694
695 /* expand selection over line breaks */
696 if (sel.type == SEL_RECTANGULAR)
697 return;
698 i = tlinelen(sel.nb.y);
699 if (i < sel.nb.x)
700 sel.nb.x = i;
701 if (tlinelen(sel.ne.y) <= sel.ne.x)
702 sel.ne.x = term.col - 1;
703 }
704
705 static inline bool
706 selected(int x, int y) {
707 if(sel.type == SEL_RECTANGULAR)
708 return BETWEEN(y, sel.nb.y, sel.ne.y)
709 && BETWEEN(x, sel.nb.x, sel.ne.x);
710
711 return BETWEEN(y, sel.nb.y, sel.ne.y)
712 && (y != sel.nb.y || x >= sel.nb.x)
713 && (y != sel.ne.y || x <= sel.ne.x);
714 }
715
716 void
717 selsnap(int mode, int *x, int *y, int direction) {
718 int newx, newy, xt, yt;
719 bool delim, prevdelim;
720 Glyph *gp, *prevgp;
721
722 switch(mode) {
723 case SNAP_WORD:
724 /*
725 * Snap around if the word wraps around at the end or
726 * beginning of a line.
727 */
728 prevgp = &term.line[*y][*x];
729 prevdelim = strchr(worddelimiters, prevgp->c[0]) != NULL;
730 for(;;) {
731 newx = *x + direction;
732 newy = *y;
733 if(!BETWEEN(newx, 0, term.col - 1)) {
734 newy += direction;
735 newx = (newx + term.col) % term.col;
736 if (!BETWEEN(newy, 0, term.row - 1))
737 break;
738
739 if(direction > 0)
740 yt = *y, xt = *x;
741 else
742 yt = newy, xt = newx;
743 if(!(term.line[yt][xt].mode & ATTR_WRAP))
744 break;
745 }
746
747 if (newx >= tlinelen(newy))
748 break;
749
750 gp = &term.line[newy][newx];
751 delim = strchr(worddelimiters, gp->c[0]) != NULL;
752 if(!(gp->mode & ATTR_WDUMMY) && (delim != prevdelim
753 || (delim && gp->c[0] != prevgp->c[0])))
754 break;
755
756 *x = newx;
757 *y = newy;
758 prevgp = gp;
759 prevdelim = delim;
760 }
761 break;
762 case SNAP_LINE:
763 /*
764 * Snap around if the the previous line or the current one
765 * has set ATTR_WRAP at its end. Then the whole next or
766 * previous line will be selected.
767 */
768 *x = (direction < 0) ? 0 : term.col - 1;
769 if(direction < 0 && *y > 0) {
770 for(; *y > 0; *y += direction) {
771 if(!(term.line[*y-1][term.col-1].mode
772 & ATTR_WRAP)) {
773 break;
774 }
775 }
776 } else if(direction > 0 && *y < term.row-1) {
777 for(; *y < term.row; *y += direction) {
778 if(!(term.line[*y][term.col-1].mode
779 & ATTR_WRAP)) {
780 break;
781 }
782 }
783 }
784 break;
785 }
786 }
787
788 void
789 getbuttoninfo(XEvent *e) {
790 int type;
791 uint state = e->xbutton.state & ~(Button1Mask | forceselmod);
792
793 sel.alt = IS_SET(MODE_ALTSCREEN);
794
795 sel.oe.x = x2col(e->xbutton.x);
796 sel.oe.y = y2row(e->xbutton.y);
797 selnormalize();
798
799 sel.type = SEL_REGULAR;
800 for(type = 1; type < LEN(selmasks); ++type) {
801 if(match(selmasks[type], state)) {
802 sel.type = type;
803 break;
804 }
805 }
806 }
807
808 void
809 mousereport(XEvent *e) {
810 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
811 button = e->xbutton.button, state = e->xbutton.state,
812 len;
813 char buf[40];
814 static int ox, oy;
815
816 /* from urxvt */
817 if(e->xbutton.type == MotionNotify) {
818 if(x == ox && y == oy)
819 return;
820 if(!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
821 return;
822 /* MOUSE_MOTION: no reporting if no button is pressed */
823 if(IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
824 return;
825
826 button = oldbutton + 32;
827 ox = x;
828 oy = y;
829 } else {
830 if(!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
831 button = 3;
832 } else {
833 button -= Button1;
834 if(button >= 3)
835 button += 64 - 3;
836 }
837 if(e->xbutton.type == ButtonPress) {
838 oldbutton = button;
839 ox = x;
840 oy = y;
841 } else if(e->xbutton.type == ButtonRelease) {
842 oldbutton = 3;
843 /* MODE_MOUSEX10: no button release reporting */
844 if(IS_SET(MODE_MOUSEX10))
845 return;
846 if (button == 64 || button == 65)
847 return;
848 }
849 }
850
851 if(!IS_SET(MODE_MOUSEX10)) {
852 button += (state & ShiftMask ? 4 : 0)
853 + (state & Mod4Mask ? 8 : 0)
854 + (state & ControlMask ? 16 : 0);
855 }
856
857 len = 0;
858 if(IS_SET(MODE_MOUSESGR)) {
859 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
860 button, x+1, y+1,
861 e->xbutton.type == ButtonRelease ? 'm' : 'M');
862 } else if(x < 223 && y < 223) {
863 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
864 32+button, 32+x+1, 32+y+1);
865 } else {
866 return;
867 }
868
869 ttywrite(buf, len);
870 }
871
872 void
873 bpress(XEvent *e) {
874 struct timespec now;
875 Mousekey *mk;
876
877 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
878 mousereport(e);
879 return;
880 }
881
882 for(mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
883 if(e->xbutton.button == mk->b
884 && match(mk->mask, e->xbutton.state)) {
885 ttysend(mk->s, strlen(mk->s));
886 return;
887 }
888 }
889
890 if(e->xbutton.button == Button1) {
891 clock_gettime(CLOCK_MONOTONIC, &now);
892
893 /* Clear previous selection, logically and visually. */
894 selclear(NULL);
895 sel.mode = 1;
896 sel.type = SEL_REGULAR;
897 sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
898 sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
899
900 /*
901 * If the user clicks below predefined timeouts specific
902 * snapping behaviour is exposed.
903 */
904 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
905 sel.snap = SNAP_LINE;
906 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
907 sel.snap = SNAP_WORD;
908 } else {
909 sel.snap = 0;
910 }
911 selnormalize();
912
913 /*
914 * Draw selection, unless it's regular and we don't want to
915 * make clicks visible
916 */
917 if(sel.snap != 0) {
918 sel.mode++;
919 tsetdirt(sel.nb.y, sel.ne.y);
920 }
921 sel.tclick2 = sel.tclick1;
922 sel.tclick1 = now;
923 }
924 }
925
926 char *
927 getsel(void) {
928 char *str, *ptr;
929 int y, bufsize, size, lastx, linelen;
930 Glyph *gp, *last;
931
932 if(sel.ob.x == -1)
933 return NULL;
934
935 bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
936 ptr = str = xmalloc(bufsize);
937
938 /* append every set & selected glyph to the selection */
939 for(y = sel.nb.y; y < sel.ne.y + 1; y++) {
940 linelen = tlinelen(y);
941
942 if(sel.type == SEL_RECTANGULAR) {
943 gp = &term.line[y][sel.nb.x];
944 lastx = sel.ne.x;
945 } else {
946 gp = &term.line[y][sel.nb.y == y ? sel.nb.x : 0];
947 lastx = (sel.ne.y == y) ? sel.ne.x : term.col-1;
948 }
949 last = &term.line[y][MIN(lastx, linelen-1)];
950 while(last >= gp && last->c[0] == ' ')
951 --last;
952
953 for( ; gp <= last; ++gp) {
954 if(gp->mode & ATTR_WDUMMY)
955 continue;
956
957 size = utf8len(gp->c);
958 memcpy(ptr, gp->c, size);
959 ptr += size;
960 }
961
962 /*
963 * Copy and pasting of line endings is inconsistent
964 * in the inconsistent terminal and GUI world.
965 * The best solution seems like to produce '\n' when
966 * something is copied from st and convert '\n' to
967 * '\r', when something to be pasted is received by
968 * st.
969 * FIXME: Fix the computer world.
970 */
971 if((y < sel.ne.y || lastx >= linelen) && !(last->mode & ATTR_WRAP))
972 *ptr++ = '\n';
973 }
974 *ptr = 0;
975 return str;
976 }
977
978 void
979 selcopy(void) {
980 xsetsel(getsel());
981 }
982
983 void
984 selnotify(XEvent *e) {
985 ulong nitems, ofs, rem;
986 int format;
987 uchar *data, *last, *repl;
988 Atom type;
989
990 ofs = 0;
991 do {
992 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
993 False, AnyPropertyType, &type, &format,
994 &nitems, &rem, &data)) {
995 fprintf(stderr, "Clipboard allocation failed\n");
996 return;
997 }
998
999 /*
1000 * As seen in getsel:
1001 * Line endings are inconsistent in the terminal and GUI world
1002 * copy and pasting. When receiving some selection data,
1003 * replace all '\n' with '\r'.
1004 * FIXME: Fix the computer world.
1005 */
1006 repl = data;
1007 last = data + nitems * format / 8;
1008 while((repl = memchr(repl, '\n', last - repl))) {
1009 *repl++ = '\r';
1010 }
1011
1012 if(IS_SET(MODE_BRCKTPASTE))
1013 ttywrite("\033[200~", 6);
1014 ttysend((char *)data, nitems * format / 8);
1015 if(IS_SET(MODE_BRCKTPASTE))
1016 ttywrite("\033[201~", 6);
1017 XFree(data);
1018 /* number of 32-bit chunks returned */
1019 ofs += nitems * format / 32;
1020 } while(rem > 0);
1021 }
1022
1023 void
1024 selpaste(const Arg *dummy) {
1025 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
1026 xw.win, CurrentTime);
1027 }
1028
1029 void
1030 clippaste(const Arg *dummy) {
1031 Atom clipboard;
1032
1033 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1034 XConvertSelection(xw.dpy, clipboard, sel.xtarget, XA_PRIMARY,
1035 xw.win, CurrentTime);
1036 }
1037
1038 void
1039 selclear(XEvent *e) {
1040 if(sel.ob.x == -1)
1041 return;
1042 sel.ob.x = -1;
1043 tsetdirt(sel.nb.y, sel.ne.y);
1044 }
1045
1046 void
1047 selrequest(XEvent *e) {
1048 XSelectionRequestEvent *xsre;
1049 XSelectionEvent xev;
1050 Atom xa_targets, string;
1051
1052 xsre = (XSelectionRequestEvent *) e;
1053 xev.type = SelectionNotify;
1054 xev.requestor = xsre->requestor;
1055 xev.selection = xsre->selection;
1056 xev.target = xsre->target;
1057 xev.time = xsre->time;
1058 /* reject */
1059 xev.property = None;
1060
1061 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
1062 if(xsre->target == xa_targets) {
1063 /* respond with the supported type */
1064 string = sel.xtarget;
1065 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1066 XA_ATOM, 32, PropModeReplace,
1067 (uchar *) &string, 1);
1068 xev.property = xsre->property;
1069 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
1070 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1071 xsre->target, 8, PropModeReplace,
1072 (uchar *) sel.clip, strlen(sel.clip));
1073 xev.property = xsre->property;
1074 }
1075
1076 /* all done, send a notification to the listener */
1077 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
1078 fprintf(stderr, "Error sending SelectionNotify event\n");
1079 }
1080
1081 void
1082 xsetsel(char *str) {
1083 /* register the selection for both the clipboard and the primary */
1084 Atom clipboard;
1085
1086 free(sel.clip);
1087 sel.clip = str;
1088
1089 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
1090
1091 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1092 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
1093 }
1094
1095 void
1096 brelease(XEvent *e) {
1097 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1098 mousereport(e);
1099 return;
1100 }
1101
1102 if(e->xbutton.button == Button2) {
1103 selpaste(NULL);
1104 } else if(e->xbutton.button == Button1) {
1105 if(sel.mode < 2) {
1106 selclear(NULL);
1107 } else {
1108 getbuttoninfo(e);
1109 selcopy();
1110 }
1111 sel.mode = 0;
1112 tsetdirt(sel.nb.y, sel.ne.y);
1113 }
1114 }
1115
1116 void
1117 bmotion(XEvent *e) {
1118 int oldey, oldex, oldsby, oldsey;
1119
1120 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1121 mousereport(e);
1122 return;
1123 }
1124
1125 if(!sel.mode)
1126 return;
1127
1128 sel.mode++;
1129 oldey = sel.oe.y;
1130 oldex = sel.oe.x;
1131 oldsby = sel.nb.y;
1132 oldsey = sel.ne.y;
1133 getbuttoninfo(e);
1134
1135 if(oldey != sel.oe.y || oldex != sel.oe.x)
1136 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
1137 }
1138
1139 void
1140 die(const char *errstr, ...) {
1141 va_list ap;
1142
1143 va_start(ap, errstr);
1144 vfprintf(stderr, errstr, ap);
1145 va_end(ap);
1146 exit(EXIT_FAILURE);
1147 }
1148
1149 void
1150 execsh(void) {
1151 char **args, *sh, *prog;
1152 const struct passwd *pw;
1153 char buf[sizeof(long) * 8 + 1];
1154
1155 errno = 0;
1156 if((pw = getpwuid(getuid())) == NULL) {
1157 if(errno)
1158 die("getpwuid:%s\n", strerror(errno));
1159 else
1160 die("who are you?\n");
1161 }
1162
1163 if (!(sh = getenv("SHELL"))) {
1164 sh = (pw->pw_shell[0]) ? pw->pw_shell : shell;
1165 }
1166
1167 if(opt_cmd)
1168 prog = opt_cmd[0];
1169 else if(utmp)
1170 prog = utmp;
1171 else
1172 prog = sh;
1173 args = (opt_cmd) ? opt_cmd : (char *[]) {prog, NULL};
1174
1175 snprintf(buf, sizeof(buf), "%lu", xw.win);
1176
1177 unsetenv("COLUMNS");
1178 unsetenv("LINES");
1179 unsetenv("TERMCAP");
1180 setenv("LOGNAME", pw->pw_name, 1);
1181 setenv("USER", pw->pw_name, 1);
1182 setenv("SHELL", sh, 1);
1183 setenv("HOME", pw->pw_dir, 1);
1184 setenv("TERM", termname, 1);
1185 setenv("WINDOWID", buf, 1);
1186
1187 signal(SIGCHLD, SIG_DFL);
1188 signal(SIGHUP, SIG_DFL);
1189 signal(SIGINT, SIG_DFL);
1190 signal(SIGQUIT, SIG_DFL);
1191 signal(SIGTERM, SIG_DFL);
1192 signal(SIGALRM, SIG_DFL);
1193
1194 execvp(prog, args);
1195 _exit(EXIT_FAILURE);
1196 }
1197
1198 void
1199 sigchld(int a) {
1200 int stat, ret;
1201
1202 if(waitpid(pid, &stat, 0) < 0)
1203 die("Waiting for pid %hd failed: %s\n", pid, strerror(errno));
1204
1205 ret = WIFEXITED(stat) ? WEXITSTATUS(stat) : EXIT_FAILURE;
1206 if (ret != EXIT_SUCCESS)
1207 die("child finished with error '%d'\n", stat);
1208 exit(EXIT_SUCCESS);
1209 }
1210
1211 void
1212 ttynew(void) {
1213 int m, s;
1214 struct winsize w = {term.row, term.col, 0, 0};
1215
1216 /* seems to work fine on linux, openbsd and freebsd */
1217 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1218 die("openpty failed: %s\n", strerror(errno));
1219
1220 switch(pid = fork()) {
1221 case -1:
1222 die("fork failed\n");
1223 break;
1224 case 0:
1225 setsid(); /* create a new process group */
1226 dup2(s, STDIN_FILENO);
1227 dup2(s, STDOUT_FILENO);
1228 dup2(s, STDERR_FILENO);
1229 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1230 die("ioctl TIOCSCTTY failed: %s\n", strerror(errno));
1231 close(s);
1232 close(m);
1233 execsh();
1234 break;
1235 default:
1236 close(s);
1237 cmdfd = m;
1238 signal(SIGCHLD, sigchld);
1239 if(opt_io) {
1240 term.mode |= MODE_PRINT;
1241 iofd = (!strcmp(opt_io, "-")) ?
1242 STDOUT_FILENO :
1243 open(opt_io, O_WRONLY | O_CREAT, 0666);
1244 if(iofd < 0) {
1245 fprintf(stderr, "Error opening %s:%s\n",
1246 opt_io, strerror(errno));
1247 }
1248 }
1249 break;
1250 }
1251 }
1252
1253 void
1254 ttyread(void) {
1255 static char buf[BUFSIZ];
1256 static int buflen = 0;
1257 char *ptr;
1258 char s[UTF_SIZ];
1259 int charsize; /* size of utf8 char in bytes */
1260 long unicodep;
1261 int ret;
1262
1263 /* append read bytes to unprocessed bytes */
1264 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1265 die("Couldn't read from shell: %s\n", strerror(errno));
1266
1267 /* process every complete utf8 char */
1268 buflen += ret;
1269 ptr = buf;
1270 while((charsize = utf8decode(ptr, &unicodep, buflen))) {
1271 utf8encode(unicodep, s, UTF_SIZ);
1272 tputc(s, charsize);
1273 ptr += charsize;
1274 buflen -= charsize;
1275 }
1276
1277 /* keep any uncomplete utf8 char for the next call */
1278 memmove(buf, ptr, buflen);
1279 }
1280
1281 void
1282 ttywrite(const char *s, size_t n) {
1283 if(xwrite(cmdfd, s, n) == -1)
1284 die("write error on tty: %s\n", strerror(errno));
1285 }
1286
1287 void
1288 ttysend(char *s, size_t n) {
1289 ttywrite(s, n);
1290 if(IS_SET(MODE_ECHO))
1291 techo(s, n);
1292 }
1293
1294 void
1295 ttyresize(void) {
1296 struct winsize w;
1297
1298 w.ws_row = term.row;
1299 w.ws_col = term.col;
1300 w.ws_xpixel = xw.tw;
1301 w.ws_ypixel = xw.th;
1302 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1303 fprintf(stderr, "Couldn't set window size: %s\n", strerror(errno));
1304 }
1305
1306 int
1307 tattrset(int attr) {
1308 int i, j;
1309
1310 for(i = 0; i < term.row-1; i++) {
1311 for(j = 0; j < term.col-1; j++) {
1312 if(term.line[i][j].mode & attr)
1313 return 1;
1314 }
1315 }
1316
1317 return 0;
1318 }
1319
1320 void
1321 tsetdirt(int top, int bot) {
1322 int i;
1323
1324 LIMIT(top, 0, term.row-1);
1325 LIMIT(bot, 0, term.row-1);
1326
1327 for(i = top; i <= bot; i++)
1328 term.dirty[i] = 1;
1329 }
1330
1331 void
1332 tsetdirtattr(int attr) {
1333 int i, j;
1334
1335 for(i = 0; i < term.row-1; i++) {
1336 for(j = 0; j < term.col-1; j++) {
1337 if(term.line[i][j].mode & attr) {
1338 tsetdirt(i, i);
1339 break;
1340 }
1341 }
1342 }
1343 }
1344
1345 void
1346 tfulldirt(void) {
1347 tsetdirt(0, term.row-1);
1348 }
1349
1350 void
1351 tcursor(int mode) {
1352 static TCursor c[2];
1353 bool alt = IS_SET(MODE_ALTSCREEN);
1354
1355 if(mode == CURSOR_SAVE) {
1356 c[alt] = term.c;
1357 } else if(mode == CURSOR_LOAD) {
1358 term.c = c[alt];
1359 tmoveto(c[alt].x, c[alt].y);
1360 }
1361 }
1362
1363 void
1364 treset(void) {
1365 uint i;
1366
1367 term.c = (TCursor){{
1368 .mode = ATTR_NULL,
1369 .fg = defaultfg,
1370 .bg = defaultbg
1371 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1372
1373 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1374 for(i = tabspaces; i < term.col; i += tabspaces)
1375 term.tabs[i] = 1;
1376 term.top = 0;
1377 term.bot = term.row - 1;
1378 term.mode = MODE_WRAP;
1379 memset(term.trantbl, sizeof(term.trantbl), CS_USA);
1380 term.charset = 0;
1381
1382 for(i = 0; i < 2; i++) {
1383 tmoveto(0, 0);
1384 tcursor(CURSOR_SAVE);
1385 tclearregion(0, 0, term.col-1, term.row-1);
1386 tswapscreen();
1387 }
1388 }
1389
1390 void
1391 tnew(int col, int row) {
1392 term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } };
1393 tresize(col, row);
1394 term.numlock = 1;
1395
1396 treset();
1397 }
1398
1399 void
1400 tswapscreen(void) {
1401 Line *tmp = term.line;
1402
1403 term.line = term.alt;
1404 term.alt = tmp;
1405 term.mode ^= MODE_ALTSCREEN;
1406 tfulldirt();
1407 }
1408
1409 void
1410 tscrolldown(int orig, int n) {
1411 int i;
1412 Line temp;
1413
1414 LIMIT(n, 0, term.bot-orig+1);
1415
1416 tsetdirt(orig, term.bot-n);
1417 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1418
1419 for(i = term.bot; i >= orig+n; i--) {
1420 temp = term.line[i];
1421 term.line[i] = term.line[i-n];
1422 term.line[i-n] = temp;
1423 }
1424
1425 selscroll(orig, n);
1426 }
1427
1428 void
1429 tscrollup(int orig, int n) {
1430 int i;
1431 Line temp;
1432
1433 LIMIT(n, 0, term.bot-orig+1);
1434
1435 tclearregion(0, orig, term.col-1, orig+n-1);
1436 tsetdirt(orig+n, term.bot);
1437
1438 for(i = orig; i <= term.bot-n; i++) {
1439 temp = term.line[i];
1440 term.line[i] = term.line[i+n];
1441 term.line[i+n] = temp;
1442 }
1443
1444 selscroll(orig, -n);
1445 }
1446
1447 void
1448 selscroll(int orig, int n) {
1449 if(sel.ob.x == -1)
1450 return;
1451
1452 if(BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
1453 if((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
1454 selclear(NULL);
1455 return;
1456 }
1457 if(sel.type == SEL_RECTANGULAR) {
1458 if(sel.ob.y < term.top)
1459 sel.ob.y = term.top;
1460 if(sel.oe.y > term.bot)
1461 sel.oe.y = term.bot;
1462 } else {
1463 if(sel.ob.y < term.top) {
1464 sel.ob.y = term.top;
1465 sel.ob.x = 0;
1466 }
1467 if(sel.oe.y > term.bot) {
1468 sel.oe.y = term.bot;
1469 sel.oe.x = term.col;
1470 }
1471 }
1472 selnormalize();
1473 }
1474 }
1475
1476 void
1477 tnewline(int first_col) {
1478 int y = term.c.y;
1479
1480 if(y == term.bot) {
1481 tscrollup(term.top, 1);
1482 } else {
1483 y++;
1484 }
1485 tmoveto(first_col ? 0 : term.c.x, y);
1486 }
1487
1488 void
1489 csiparse(void) {
1490 char *p = csiescseq.buf, *np;
1491 long int v;
1492
1493 csiescseq.narg = 0;
1494 if(*p == '?') {
1495 csiescseq.priv = 1;
1496 p++;
1497 }
1498
1499 csiescseq.buf[csiescseq.len] = '\0';
1500 while(p < csiescseq.buf+csiescseq.len) {
1501 np = NULL;
1502 v = strtol(p, &np, 10);
1503 if(np == p)
1504 v = 0;
1505 if(v == LONG_MAX || v == LONG_MIN)
1506 v = -1;
1507 csiescseq.arg[csiescseq.narg++] = v;
1508 p = np;
1509 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1510 break;
1511 p++;
1512 }
1513 csiescseq.mode = *p;
1514 }
1515
1516 /* for absolute user moves, when decom is set */
1517 void
1518 tmoveato(int x, int y) {
1519 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1520 }
1521
1522 void
1523 tmoveto(int x, int y) {
1524 int miny, maxy;
1525
1526 if(term.c.state & CURSOR_ORIGIN) {
1527 miny = term.top;
1528 maxy = term.bot;
1529 } else {
1530 miny = 0;
1531 maxy = term.row - 1;
1532 }
1533 LIMIT(x, 0, term.col-1);
1534 LIMIT(y, miny, maxy);
1535 term.c.state &= ~CURSOR_WRAPNEXT;
1536 term.c.x = x;
1537 term.c.y = y;
1538 }
1539
1540 void
1541 tsetchar(char *c, Glyph *attr, int x, int y) {
1542 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1543 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1544 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1545 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1546 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1547 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1548 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1549 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1550 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1551 };
1552
1553 /*
1554 * The table is proudly stolen from rxvt.
1555 */
1556 if(term.trantbl[term.charset] == CS_GRAPHIC0) {
1557 if(BETWEEN(c[0], 0x41, 0x7e) && vt100_0[c[0] - 0x41]) {
1558 c = vt100_0[c[0] - 0x41];
1559 }
1560 }
1561
1562 if(term.line[y][x].mode & ATTR_WIDE) {
1563 if(x+1 < term.col) {
1564 term.line[y][x+1].c[0] = ' ';
1565 term.line[y][x+1].mode &= ~ATTR_WDUMMY;
1566 }
1567 } else if(term.line[y][x].mode & ATTR_WDUMMY) {
1568 term.line[y][x-1].c[0] = ' ';
1569 term.line[y][x-1].mode &= ~ATTR_WIDE;
1570 }
1571
1572 term.dirty[y] = 1;
1573 term.line[y][x] = *attr;
1574 memcpy(term.line[y][x].c, c, UTF_SIZ);
1575 }
1576
1577 void
1578 tclearregion(int x1, int y1, int x2, int y2) {
1579 int x, y, temp;
1580 Glyph *gp;
1581
1582 if(x1 > x2)
1583 temp = x1, x1 = x2, x2 = temp;
1584 if(y1 > y2)
1585 temp = y1, y1 = y2, y2 = temp;
1586
1587 LIMIT(x1, 0, term.col-1);
1588 LIMIT(x2, 0, term.col-1);
1589 LIMIT(y1, 0, term.row-1);
1590 LIMIT(y2, 0, term.row-1);
1591
1592 for(y = y1; y <= y2; y++) {
1593 term.dirty[y] = 1;
1594 for(x = x1; x <= x2; x++) {
1595 gp = &term.line[y][x];
1596 if(selected(x, y))
1597 selclear(NULL);
1598 gp->fg = term.c.attr.fg;
1599 gp->bg = term.c.attr.bg;
1600 gp->mode = 0;
1601 memcpy(gp->c, " ", 2);
1602 }
1603 }
1604 }
1605
1606 void
1607 tdeletechar(int n) {
1608 int dst, src, size;
1609 Glyph *line;
1610
1611 LIMIT(n, 0, term.col - term.c.x);
1612
1613 dst = term.c.x;
1614 src = term.c.x + n;
1615 size = term.col - src;
1616 line = term.line[term.c.y];
1617
1618 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1619 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1620 }
1621
1622 void
1623 tinsertblank(int n) {
1624 int dst, src, size;
1625 Glyph *line;
1626
1627 LIMIT(n, 0, term.col - term.c.x);
1628
1629 dst = term.c.x + n;
1630 src = term.c.x;
1631 size = term.col - dst;
1632 line = term.line[term.c.y];
1633
1634 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1635 tclearregion(src, term.c.y, dst - 1, term.c.y);
1636 }
1637
1638 void
1639 tinsertblankline(int n) {
1640 if(BETWEEN(term.c.y, term.top, term.bot))
1641 tscrolldown(term.c.y, n);
1642 }
1643
1644 void
1645 tdeleteline(int n) {
1646 if(BETWEEN(term.c.y, term.top, term.bot))
1647 tscrollup(term.c.y, n);
1648 }
1649
1650 int32_t
1651 tdefcolor(int *attr, int *npar, int l) {
1652 int32_t idx = -1;
1653 uint r, g, b;
1654
1655 switch (attr[*npar + 1]) {
1656 case 2: /* direct color in RGB space */
1657 if (*npar + 4 >= l) {
1658 fprintf(stderr,
1659 "erresc(38): Incorrect number of parameters (%d)\n",
1660 *npar);
1661 break;
1662 }
1663 r = attr[*npar + 2];
1664 g = attr[*npar + 3];
1665 b = attr[*npar + 4];
1666 *npar += 4;
1667 if(!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
1668 fprintf(stderr, "erresc: bad rgb color (%d,%d,%d)\n",
1669 r, g, b);
1670 else
1671 idx = TRUECOLOR(r, g, b);
1672 break;
1673 case 5: /* indexed color */
1674 if (*npar + 2 >= l) {
1675 fprintf(stderr,
1676 "erresc(38): Incorrect number of parameters (%d)\n",
1677 *npar);
1678 break;
1679 }
1680 *npar += 2;
1681 if(!BETWEEN(attr[*npar], 0, 255))
1682 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
1683 else
1684 idx = attr[*npar];
1685 break;
1686 case 0: /* implemented defined (only foreground) */
1687 case 1: /* transparent */
1688 case 3: /* direct color in CMY space */
1689 case 4: /* direct color in CMYK space */
1690 default:
1691 fprintf(stderr,
1692 "erresc(38): gfx attr %d unknown\n", attr[*npar]);
1693 break;
1694 }
1695
1696 return idx;
1697 }
1698
1699 void
1700 tsetattr(int *attr, int l) {
1701 int i;
1702 int32_t idx;
1703
1704 for(i = 0; i < l; i++) {
1705 switch(attr[i]) {
1706 case 0:
1707 term.c.attr.mode &= ~(
1708 ATTR_BOLD |
1709 ATTR_FAINT |
1710 ATTR_ITALIC |
1711 ATTR_UNDERLINE |
1712 ATTR_BLINK |
1713 ATTR_REVERSE |
1714 ATTR_INVISIBLE |
1715 ATTR_STRUCK );
1716 term.c.attr.fg = defaultfg;
1717 term.c.attr.bg = defaultbg;
1718 break;
1719 case 1:
1720 term.c.attr.mode |= ATTR_BOLD;
1721 break;
1722 case 2:
1723 term.c.attr.mode |= ATTR_FAINT;
1724 break;
1725 case 3:
1726 term.c.attr.mode |= ATTR_ITALIC;
1727 break;
1728 case 4:
1729 term.c.attr.mode |= ATTR_UNDERLINE;
1730 break;
1731 case 5: /* slow blink */
1732 /* FALLTHROUGH */
1733 case 6: /* rapid blink */
1734 term.c.attr.mode |= ATTR_BLINK;
1735 break;
1736 case 7:
1737 term.c.attr.mode |= ATTR_REVERSE;
1738 break;
1739 case 8:
1740 term.c.attr.mode |= ATTR_INVISIBLE;
1741 break;
1742 case 9:
1743 term.c.attr.mode |= ATTR_STRUCK;
1744 break;
1745 case 22:
1746 term.c.attr.mode &= ~(ATTR_BOLD | ATTR_FAINT);
1747 break;
1748 case 23:
1749 term.c.attr.mode &= ~ATTR_ITALIC;
1750 break;
1751 case 24:
1752 term.c.attr.mode &= ~ATTR_UNDERLINE;
1753 break;
1754 case 25:
1755 term.c.attr.mode &= ~ATTR_BLINK;
1756 break;
1757 case 27:
1758 term.c.attr.mode &= ~ATTR_REVERSE;
1759 break;
1760 case 28:
1761 term.c.attr.mode &= ~ATTR_INVISIBLE;
1762 break;
1763 case 29:
1764 term.c.attr.mode &= ~ATTR_STRUCK;
1765 break;
1766 case 38:
1767 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1768 term.c.attr.fg = idx;
1769 break;
1770 case 39:
1771 term.c.attr.fg = defaultfg;
1772 break;
1773 case 48:
1774 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1775 term.c.attr.bg = idx;
1776 break;
1777 case 49:
1778 term.c.attr.bg = defaultbg;
1779 break;
1780 default:
1781 if(BETWEEN(attr[i], 30, 37)) {
1782 term.c.attr.fg = attr[i] - 30;
1783 } else if(BETWEEN(attr[i], 40, 47)) {
1784 term.c.attr.bg = attr[i] - 40;
1785 } else if(BETWEEN(attr[i], 90, 97)) {
1786 term.c.attr.fg = attr[i] - 90 + 8;
1787 } else if(BETWEEN(attr[i], 100, 107)) {
1788 term.c.attr.bg = attr[i] - 100 + 8;
1789 } else {
1790 fprintf(stderr,
1791 "erresc(default): gfx attr %d unknown\n",
1792 attr[i]), csidump();
1793 }
1794 break;
1795 }
1796 }
1797 }
1798
1799 void
1800 tsetscroll(int t, int b) {
1801 int temp;
1802
1803 LIMIT(t, 0, term.row-1);
1804 LIMIT(b, 0, term.row-1);
1805 if(t > b) {
1806 temp = t;
1807 t = b;
1808 b = temp;
1809 }
1810 term.top = t;
1811 term.bot = b;
1812 }
1813
1814 void
1815 tsetmode(bool priv, bool set, int *args, int narg) {
1816 int *lim, mode;
1817 bool alt;
1818
1819 for(lim = args + narg; args < lim; ++args) {
1820 if(priv) {
1821 switch(*args) {
1822 case 1: /* DECCKM -- Cursor key */
1823 MODBIT(term.mode, set, MODE_APPCURSOR);
1824 break;
1825 case 5: /* DECSCNM -- Reverse video */
1826 mode = term.mode;
1827 MODBIT(term.mode, set, MODE_REVERSE);
1828 if(mode != term.mode)
1829 redraw(REDRAW_TIMEOUT);
1830 break;
1831 case 6: /* DECOM -- Origin */
1832 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1833 tmoveato(0, 0);
1834 break;
1835 case 7: /* DECAWM -- Auto wrap */
1836 MODBIT(term.mode, set, MODE_WRAP);
1837 break;
1838 case 0: /* Error (IGNORED) */
1839 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1840 case 3: /* DECCOLM -- Column (IGNORED) */
1841 case 4: /* DECSCLM -- Scroll (IGNORED) */
1842 case 8: /* DECARM -- Auto repeat (IGNORED) */
1843 case 18: /* DECPFF -- Printer feed (IGNORED) */
1844 case 19: /* DECPEX -- Printer extent (IGNORED) */
1845 case 42: /* DECNRCM -- National characters (IGNORED) */
1846 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1847 break;
1848 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1849 MODBIT(term.mode, !set, MODE_HIDE);
1850 break;
1851 case 9: /* X10 mouse compatibility mode */
1852 xsetpointermotion(0);
1853 MODBIT(term.mode, 0, MODE_MOUSE);
1854 MODBIT(term.mode, set, MODE_MOUSEX10);
1855 break;
1856 case 1000: /* 1000: report button press */
1857 xsetpointermotion(0);
1858 MODBIT(term.mode, 0, MODE_MOUSE);
1859 MODBIT(term.mode, set, MODE_MOUSEBTN);
1860 break;
1861 case 1002: /* 1002: report motion on button press */
1862 xsetpointermotion(0);
1863 MODBIT(term.mode, 0, MODE_MOUSE);
1864 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1865 break;
1866 case 1003: /* 1003: enable all mouse motions */
1867 xsetpointermotion(set);
1868 MODBIT(term.mode, 0, MODE_MOUSE);
1869 MODBIT(term.mode, set, MODE_MOUSEMANY);
1870 break;
1871 case 1004: /* 1004: send focus events to tty */
1872 MODBIT(term.mode, set, MODE_FOCUS);
1873 break;
1874 case 1006: /* 1006: extended reporting mode */
1875 MODBIT(term.mode, set, MODE_MOUSESGR);
1876 break;
1877 case 1034:
1878 MODBIT(term.mode, set, MODE_8BIT);
1879 break;
1880 case 1049: /* swap screen & set/restore cursor as xterm */
1881 if (!allowaltscreen)
1882 break;
1883 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1884 /* FALLTHROUGH */
1885 case 47: /* swap screen */
1886 case 1047:
1887 if (!allowaltscreen)
1888 break;
1889 alt = IS_SET(MODE_ALTSCREEN);
1890 if(alt) {
1891 tclearregion(0, 0, term.col-1,
1892 term.row-1);
1893 }
1894 if(set ^ alt) /* set is always 1 or 0 */
1895 tswapscreen();
1896 if(*args != 1049)
1897 break;
1898 /* FALLTHROUGH */
1899 case 1048:
1900 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1901 break;
1902 case 2004: /* 2004: bracketed paste mode */
1903 MODBIT(term.mode, set, MODE_BRCKTPASTE);
1904 break;
1905 /* Not implemented mouse modes. See comments there. */
1906 case 1001: /* mouse highlight mode; can hang the
1907 terminal by design when implemented. */
1908 case 1005: /* UTF-8 mouse mode; will confuse
1909 applications not supporting UTF-8
1910 and luit. */
1911 case 1015: /* urxvt mangled mouse mode; incompatible
1912 and can be mistaken for other control
1913 codes. */
1914 default:
1915 fprintf(stderr,
1916 "erresc: unknown private set/reset mode %d\n",
1917 *args);
1918 break;
1919 }
1920 } else {
1921 switch(*args) {
1922 case 0: /* Error (IGNORED) */
1923 break;
1924 case 2: /* KAM -- keyboard action */
1925 MODBIT(term.mode, set, MODE_KBDLOCK);
1926 break;
1927 case 4: /* IRM -- Insertion-replacement */
1928 MODBIT(term.mode, set, MODE_INSERT);
1929 break;
1930 case 12: /* SRM -- Send/Receive */
1931 MODBIT(term.mode, !set, MODE_ECHO);
1932 break;
1933 case 20: /* LNM -- Linefeed/new line */
1934 MODBIT(term.mode, set, MODE_CRLF);
1935 break;
1936 default:
1937 fprintf(stderr,
1938 "erresc: unknown set/reset mode %d\n",
1939 *args);
1940 break;
1941 }
1942 }
1943 }
1944 }
1945
1946 void
1947 csihandle(void) {
1948 char buf[40];
1949 int len;
1950
1951 switch(csiescseq.mode) {
1952 default:
1953 unknown:
1954 fprintf(stderr, "erresc: unknown csi ");
1955 csidump();
1956 /* die(""); */
1957 break;
1958 case '@': /* ICH -- Insert <n> blank char */
1959 DEFAULT(csiescseq.arg[0], 1);
1960 tinsertblank(csiescseq.arg[0]);
1961 break;
1962 case 'A': /* CUU -- Cursor <n> Up */
1963 DEFAULT(csiescseq.arg[0], 1);
1964 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1965 break;
1966 case 'B': /* CUD -- Cursor <n> Down */
1967 case 'e': /* VPR --Cursor <n> Down */
1968 DEFAULT(csiescseq.arg[0], 1);
1969 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1970 break;
1971 case 'i': /* MC -- Media Copy */
1972 switch(csiescseq.arg[0]) {
1973 case 0:
1974 tdump();
1975 break;
1976 case 1:
1977 tdumpline(term.c.y);
1978 break;
1979 case 2:
1980 tdumpsel();
1981 break;
1982 case 4:
1983 term.mode &= ~MODE_PRINT;
1984 break;
1985 case 5:
1986 term.mode |= MODE_PRINT;
1987 break;
1988 }
1989 break;
1990 case 'c': /* DA -- Device Attributes */
1991 if(csiescseq.arg[0] == 0)
1992 ttywrite(vtiden, sizeof(vtiden) - 1);
1993 break;
1994 case 'C': /* CUF -- Cursor <n> Forward */
1995 case 'a': /* HPR -- Cursor <n> Forward */
1996 DEFAULT(csiescseq.arg[0], 1);
1997 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1998 break;
1999 case 'D': /* CUB -- Cursor <n> Backward */
2000 DEFAULT(csiescseq.arg[0], 1);
2001 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
2002 break;
2003 case 'E': /* CNL -- Cursor <n> Down and first col */
2004 DEFAULT(csiescseq.arg[0], 1);
2005 tmoveto(0, term.c.y+csiescseq.arg[0]);
2006 break;
2007 case 'F': /* CPL -- Cursor <n> Up and first col */
2008 DEFAULT(csiescseq.arg[0], 1);
2009 tmoveto(0, term.c.y-csiescseq.arg[0]);
2010 break;
2011 case 'g': /* TBC -- Tabulation clear */
2012 switch(csiescseq.arg[0]) {
2013 case 0: /* clear current tab stop */
2014 term.tabs[term.c.x] = 0;
2015 break;
2016 case 3: /* clear all the tabs */
2017 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
2018 break;
2019 default:
2020 goto unknown;
2021 }
2022 break;
2023 case 'G': /* CHA -- Move to <col> */
2024 case '`': /* HPA */
2025 DEFAULT(csiescseq.arg[0], 1);
2026 tmoveto(csiescseq.arg[0]-1, term.c.y);
2027 break;
2028 case 'H': /* CUP -- Move to <row> <col> */
2029 case 'f': /* HVP */
2030 DEFAULT(csiescseq.arg[0], 1);
2031 DEFAULT(csiescseq.arg[1], 1);
2032 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
2033 break;
2034 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
2035 DEFAULT(csiescseq.arg[0], 1);
2036 tputtab(csiescseq.arg[0]);
2037 break;
2038 case 'J': /* ED -- Clear screen */
2039 selclear(NULL);
2040 switch(csiescseq.arg[0]) {
2041 case 0: /* below */
2042 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
2043 if(term.c.y < term.row-1) {
2044 tclearregion(0, term.c.y+1, term.col-1,
2045 term.row-1);
2046 }
2047 break;
2048 case 1: /* above */
2049 if(term.c.y > 1)
2050 tclearregion(0, 0, term.col-1, term.c.y-1);
2051 tclearregion(0, term.c.y, term.c.x, term.c.y);
2052 break;
2053 case 2: /* all */
2054 tclearregion(0, 0, term.col-1, term.row-1);
2055 break;
2056 default:
2057 goto unknown;
2058 }
2059 break;
2060 case 'K': /* EL -- Clear line */
2061 switch(csiescseq.arg[0]) {
2062 case 0: /* right */
2063 tclearregion(term.c.x, term.c.y, term.col-1,
2064 term.c.y);
2065 break;
2066 case 1: /* left */
2067 tclearregion(0, term.c.y, term.c.x, term.c.y);
2068 break;
2069 case 2: /* all */
2070 tclearregion(0, term.c.y, term.col-1, term.c.y);
2071 break;
2072 }
2073 break;
2074 case 'S': /* SU -- Scroll <n> line up */
2075 DEFAULT(csiescseq.arg[0], 1);
2076 tscrollup(term.top, csiescseq.arg[0]);
2077 break;
2078 case 'T': /* SD -- Scroll <n> line down */
2079 DEFAULT(csiescseq.arg[0], 1);
2080 tscrolldown(term.top, csiescseq.arg[0]);
2081 break;
2082 case 'L': /* IL -- Insert <n> blank lines */
2083 DEFAULT(csiescseq.arg[0], 1);
2084 tinsertblankline(csiescseq.arg[0]);
2085 break;
2086 case 'l': /* RM -- Reset Mode */
2087 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
2088 break;
2089 case 'M': /* DL -- Delete <n> lines */
2090 DEFAULT(csiescseq.arg[0], 1);
2091 tdeleteline(csiescseq.arg[0]);
2092 break;
2093 case 'X': /* ECH -- Erase <n> char */
2094 DEFAULT(csiescseq.arg[0], 1);
2095 tclearregion(term.c.x, term.c.y,
2096 term.c.x + csiescseq.arg[0] - 1, term.c.y);
2097 break;
2098 case 'P': /* DCH -- Delete <n> char */
2099 DEFAULT(csiescseq.arg[0], 1);
2100 tdeletechar(csiescseq.arg[0]);
2101 break;
2102 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
2103 DEFAULT(csiescseq.arg[0], 1);
2104 tputtab(-csiescseq.arg[0]);
2105 break;
2106 case 'd': /* VPA -- Move to <row> */
2107 DEFAULT(csiescseq.arg[0], 1);
2108 tmoveato(term.c.x, csiescseq.arg[0]-1);
2109 break;
2110 case 'h': /* SM -- Set terminal mode */
2111 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
2112 break;
2113 case 'm': /* SGR -- Terminal attribute (color) */
2114 tsetattr(csiescseq.arg, csiescseq.narg);
2115 break;
2116 case 'n': /* DSR – Device Status Report (cursor position) */
2117 if (csiescseq.arg[0] == 6) {
2118 len = snprintf(buf, sizeof(buf),"\033[%i;%iR",
2119 term.c.y+1, term.c.x+1);
2120 ttywrite(buf, len);
2121 }
2122 break;
2123 case 'r': /* DECSTBM -- Set Scrolling Region */
2124 if(csiescseq.priv) {
2125 goto unknown;
2126 } else {
2127 DEFAULT(csiescseq.arg[0], 1);
2128 DEFAULT(csiescseq.arg[1], term.row);
2129 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
2130 tmoveato(0, 0);
2131 }
2132 break;
2133 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
2134 tcursor(CURSOR_SAVE);
2135 break;
2136 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
2137 tcursor(CURSOR_LOAD);
2138 break;
2139 }
2140 }
2141
2142 void
2143 csidump(void) {
2144 int i;
2145 uint c;
2146
2147 printf("ESC[");
2148 for(i = 0; i < csiescseq.len; i++) {
2149 c = csiescseq.buf[i] & 0xff;
2150 if(isprint(c)) {
2151 putchar(c);
2152 } else if(c == '\n') {
2153 printf("(\\n)");
2154 } else if(c == '\r') {
2155 printf("(\\r)");
2156 } else if(c == 0x1b) {
2157 printf("(\\e)");
2158 } else {
2159 printf("(%02x)", c);
2160 }
2161 }
2162 putchar('\n');
2163 }
2164
2165 void
2166 csireset(void) {
2167 memset(&csiescseq, 0, sizeof(csiescseq));
2168 }
2169
2170 void
2171 strhandle(void) {
2172 char *p = NULL;
2173 int j, narg, par;
2174
2175 term.esc &= ~(ESC_STR_END|ESC_STR);
2176 strparse();
2177 narg = strescseq.narg;
2178 par = atoi(strescseq.args[0]);
2179
2180 switch(strescseq.type) {
2181 case ']': /* OSC -- Operating System Command */
2182 switch(par) {
2183 case 0:
2184 case 1:
2185 case 2:
2186 if(narg > 1)
2187 xsettitle(strescseq.args[1]);
2188 return;
2189 case 4: /* color set */
2190 if(narg < 3)
2191 break;
2192 p = strescseq.args[2];
2193 /* FALLTHROUGH */
2194 case 104: /* color reset, here p = NULL */
2195 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2196 if(xsetcolorname(j, p)) {
2197 fprintf(stderr, "erresc: invalid color %s\n", p);
2198 } else {
2199 /*
2200 * TODO if defaultbg color is changed, borders
2201 * are dirty
2202 */
2203 redraw(0);
2204 }
2205 return;
2206 }
2207 break;
2208 case 'k': /* old title set compatibility */
2209 xsettitle(strescseq.args[0]);
2210 return;
2211 case 'P': /* DCS -- Device Control String */
2212 case '_': /* APC -- Application Program Command */
2213 case '^': /* PM -- Privacy Message */
2214 return;
2215 }
2216
2217 fprintf(stderr, "erresc: unknown str ");
2218 strdump();
2219 }
2220
2221 void
2222 strparse(void) {
2223 char *p = strescseq.buf;
2224
2225 strescseq.narg = 0;
2226 strescseq.buf[strescseq.len] = '\0';
2227 while(p && strescseq.narg < STR_ARG_SIZ)
2228 strescseq.args[strescseq.narg++] = strsep(&p, ";");
2229 }
2230
2231 void
2232 strdump(void) {
2233 int i;
2234 uint c;
2235
2236 printf("ESC%c", strescseq.type);
2237 for(i = 0; i < strescseq.len; i++) {
2238 c = strescseq.buf[i] & 0xff;
2239 if(c == '\0') {
2240 return;
2241 } else if(isprint(c)) {
2242 putchar(c);
2243 } else if(c == '\n') {
2244 printf("(\\n)");
2245 } else if(c == '\r') {
2246 printf("(\\r)");
2247 } else if(c == 0x1b) {
2248 printf("(\\e)");
2249 } else {
2250 printf("(%02x)", c);
2251 }
2252 }
2253 printf("ESC\\\n");
2254 }
2255
2256 void
2257 strreset(void) {
2258 memset(&strescseq, 0, sizeof(strescseq));
2259 }
2260
2261 void
2262 tprinter(char *s, size_t len) {
2263 if(iofd != -1 && xwrite(iofd, s, len) < 0) {
2264 fprintf(stderr, "Error writing in %s:%s\n",
2265 opt_io, strerror(errno));
2266 close(iofd);
2267 iofd = -1;
2268 }
2269 }
2270
2271 void
2272 toggleprinter(const Arg *arg) {
2273 term.mode ^= MODE_PRINT;
2274 }
2275
2276 void
2277 printscreen(const Arg *arg) {
2278 tdump();
2279 }
2280
2281 void
2282 printsel(const Arg *arg) {
2283 tdumpsel();
2284 }
2285
2286 void
2287 tdumpsel(void) {
2288 char *ptr;
2289
2290 if((ptr = getsel())) {
2291 tprinter(ptr, strlen(ptr));
2292 free(ptr);
2293 }
2294 }
2295
2296 void
2297 tdumpline(int n) {
2298 Glyph *bp, *end;
2299
2300 bp = &term.line[n][0];
2301 end = &bp[MIN(tlinelen(n), term.col) - 1];
2302 if(bp != end || bp->c[0] != ' ') {
2303 for( ;bp <= end; ++bp)
2304 tprinter(bp->c, utf8len(bp->c));
2305 }
2306 tprinter("\n", 1);
2307 }
2308
2309 void
2310 tdump(void) {
2311 int i;
2312
2313 for(i = 0; i < term.row; ++i)
2314 tdumpline(i);
2315 }
2316
2317 void
2318 tputtab(int n) {
2319 uint x = term.c.x;
2320
2321 if(n > 0) {
2322 while(x < term.col && n--)
2323 for(++x; x < term.col && !term.tabs[x]; ++x)
2324 /* nothing */ ;
2325 } else if(n < 0) {
2326 while(x > 0 && n++)
2327 for(--x; x > 0 && !term.tabs[x]; --x)
2328 /* nothing */ ;
2329 }
2330 tmoveto(x, term.c.y);
2331 }
2332
2333 void
2334 techo(char *buf, int len) {
2335 for(; len > 0; buf++, len--) {
2336 char c = *buf;
2337
2338 if(ISCONTROL((uchar) c)) { /* control code */
2339 if(c & 0x80) {
2340 c &= 0x7f;
2341 tputc("^", 1);
2342 tputc("[", 1);
2343 } else if(c != '\n' && c != '\r' && c != '\t') {
2344 c ^= 0x40;
2345 tputc("^", 1);
2346 }
2347 tputc(&c, 1);
2348 } else {
2349 break;
2350 }
2351 }
2352 if(len)
2353 tputc(buf, len);
2354 }
2355
2356 void
2357 tdeftran(char ascii) {
2358 static char cs[] = "0B";
2359 static int vcs[] = {CS_GRAPHIC0, CS_USA};
2360 char *p;
2361
2362 if((p = strchr(cs, ascii)) == NULL) {
2363 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2364 } else {
2365 term.trantbl[term.icharset] = vcs[p - cs];
2366 }
2367 }
2368
2369 void
2370 tdectest(char c) {
2371 static char E[UTF_SIZ] = "E";
2372 int x, y;
2373
2374 if(c == '8') { /* DEC screen alignment test. */
2375 for(x = 0; x < term.col; ++x) {
2376 for(y = 0; y < term.row; ++y)
2377 tsetchar(E, &term.c.attr, x, y);
2378 }
2379 }
2380 }
2381
2382 void
2383 tstrsequence(uchar c) {
2384 if (c & 0x80) {
2385 switch (c) {
2386 case 0x90: /* DCS -- Device Control String */
2387 c = 'P';
2388 break;
2389 case 0x9f: /* APC -- Application Program Command */
2390 c = '_';
2391 break;
2392 case 0x9e: /* PM -- Privacy Message */
2393 c = '^';
2394 break;
2395 case 0x9d: /* OSC -- Operating System Command */
2396 c = ']';
2397 break;
2398 }
2399 }
2400 strreset();
2401 strescseq.type = c;
2402 term.esc |= ESC_STR;
2403 return;
2404 }
2405
2406 void
2407 tcontrolcode(uchar ascii) {
2408 static char question[UTF_SIZ] = "?";
2409
2410 switch(ascii) {
2411 case '\t': /* HT */
2412 tputtab(1);
2413 return;
2414 case '\b': /* BS */
2415 tmoveto(term.c.x-1, term.c.y);
2416 return;
2417 case '\r': /* CR */
2418 tmoveto(0, term.c.y);
2419 return;
2420 case '\f': /* LF */
2421 case '\v': /* VT */
2422 case '\n': /* LF */
2423 /* go to first col if the mode is set */
2424 tnewline(IS_SET(MODE_CRLF));
2425 return;
2426 case '\a': /* BEL */
2427 if(term.esc & ESC_STR_END) {
2428 /* backwards compatibility to xterm */
2429 strhandle();
2430 } else {
2431 if(!(xw.state & WIN_FOCUSED))
2432 xseturgency(1);
2433 if (bellvolume)
2434 XkbBell(xw.dpy, xw.win, bellvolume, (Atom)NULL);
2435 }
2436 break;
2437 case '\033': /* ESC */
2438 csireset();
2439 term.esc &= ~(ESC_CSI|ESC_ALTCHARSET|ESC_TEST);
2440 term.esc |= ESC_START;
2441 return;
2442 case '\016': /* SO (LS1 -- Locking shift 1) */
2443 case '\017': /* SI (LS0 -- Locking shift 0) */
2444 term.charset = 1 - (ascii - '\016');
2445 return;
2446 case '\032': /* SUB */
2447 tsetchar(question, &term.c.attr, term.c.x, term.c.y);
2448 case '\030': /* CAN */
2449 csireset();
2450 break;
2451 case '\005': /* ENQ (IGNORED) */
2452 case '\000': /* NUL (IGNORED) */
2453 case '\021': /* XON (IGNORED) */
2454 case '\023': /* XOFF (IGNORED) */
2455 case 0177: /* DEL (IGNORED) */
2456 return;
2457 case 0x84: /* TODO: IND */
2458 break;
2459 case 0x85: /* NEL -- Next line */
2460 tnewline(1); /* always go to first col */
2461 break;
2462 case 0x88: /* HTS -- Horizontal tab stop */
2463 term.tabs[term.c.x] = 1;
2464 break;
2465 case 0x8d: /* TODO: RI */
2466 case 0x8e: /* TODO: SS2 */
2467 case 0x8f: /* TODO: SS3 */
2468 case 0x98: /* TODO: SOS */
2469 break;
2470 case 0x9a: /* DECID -- Identify Terminal */
2471 ttywrite(vtiden, sizeof(vtiden) - 1);
2472 break;
2473 case 0x9b: /* TODO: CSI */
2474 case 0x9c: /* TODO: ST */
2475 break;
2476 case 0x90: /* DCS -- Device Control String */
2477 case 0x9f: /* APC -- Application Program Command */
2478 case 0x9e: /* PM -- Privacy Message */
2479 case 0x9d: /* OSC -- Operating System Command */
2480 tstrsequence(ascii);
2481 return;
2482 }
2483 /* only CAN, SUB, \a and C1 chars interrupt a sequence */
2484 term.esc &= ~(ESC_STR_END|ESC_STR);
2485 return;
2486 }
2487
2488 /*
2489 * returns 1 when the sequence is finished and it hasn't to read
2490 * more characters for this sequence, otherwise 0
2491 */
2492 int
2493 eschandle(uchar ascii) {
2494 switch(ascii) {
2495 case '[':
2496 term.esc |= ESC_CSI;
2497 return 0;
2498 case '#':
2499 term.esc |= ESC_TEST;
2500 return 0;
2501 case 'P': /* DCS -- Device Control String */
2502 case '_': /* APC -- Application Program Command */
2503 case '^': /* PM -- Privacy Message */
2504 case ']': /* OSC -- Operating System Command */
2505 case 'k': /* old title set compatibility */
2506 tstrsequence(ascii);
2507 return 0;
2508 case 'n': /* LS2 -- Locking shift 2 */
2509 case 'o': /* LS3 -- Locking shift 3 */
2510 term.charset = 2 + (ascii - 'n');
2511 break;
2512 case '(': /* GZD4 -- set primary charset G0 */
2513 case ')': /* G1D4 -- set secondary charset G1 */
2514 case '*': /* G2D4 -- set tertiary charset G2 */
2515 case '+': /* G3D4 -- set quaternary charset G3 */
2516 term.icharset = ascii - '(';
2517 term.esc |= ESC_ALTCHARSET;
2518 return 0;
2519 case 'D': /* IND -- Linefeed */
2520 if(term.c.y == term.bot) {
2521 tscrollup(term.top, 1);
2522 } else {
2523 tmoveto(term.c.x, term.c.y+1);
2524 }
2525 break;
2526 case 'E': /* NEL -- Next line */
2527 tnewline(1); /* always go to first col */
2528 break;
2529 case 'H': /* HTS -- Horizontal tab stop */
2530 term.tabs[term.c.x] = 1;
2531 break;
2532 case 'M': /* RI -- Reverse index */
2533 if(term.c.y == term.top) {
2534 tscrolldown(term.top, 1);
2535 } else {
2536 tmoveto(term.c.x, term.c.y-1);
2537 }
2538 break;
2539 case 'Z': /* DECID -- Identify Terminal */
2540 ttywrite(vtiden, sizeof(vtiden) - 1);
2541 break;
2542 case 'c': /* RIS -- Reset to inital state */
2543 treset();
2544 xresettitle();
2545 xloadcols();
2546 break;
2547 case '=': /* DECPAM -- Application keypad */
2548 term.mode |= MODE_APPKEYPAD;
2549 break;
2550 case '>': /* DECPNM -- Normal keypad */
2551 term.mode &= ~MODE_APPKEYPAD;
2552 break;
2553 case '7': /* DECSC -- Save Cursor */
2554 tcursor(CURSOR_SAVE);
2555 break;
2556 case '8': /* DECRC -- Restore Cursor */
2557 tcursor(CURSOR_LOAD);
2558 break;
2559 case '\\': /* ST -- String Terminator */
2560 if(term.esc & ESC_STR_END)
2561 strhandle();
2562 break;
2563 default:
2564 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2565 (uchar) ascii, isprint(ascii)? ascii:'.');
2566 break;
2567 }
2568 return 1;
2569 }
2570
2571 void
2572 tputc(char *c, int len) {
2573 uchar ascii;
2574 bool control;
2575 long unicodep;
2576 int width;
2577 Glyph *gp;
2578
2579 if(len == 1) {
2580 width = 1;
2581 unicodep = ascii = *c;
2582 } else {
2583 utf8decode(c, &unicodep, UTF_SIZ);
2584 if ((width = wcwidth(unicodep)) == -1) {
2585 c = "\357\277\275"; /* UTF_INVALID */
2586 width = 1;
2587 }
2588 control = ISCONTROLC1(unicodep);
2589 ascii = unicodep;
2590 }
2591
2592 if(IS_SET(MODE_PRINT))
2593 tprinter(c, len);
2594 control = ISCONTROL(unicodep);
2595
2596 /*
2597 * STR sequence must be checked before anything else
2598 * because it uses all following characters until it
2599 * receives a ESC, a SUB, a ST or any other C1 control
2600 * character.
2601 */
2602 if(term.esc & ESC_STR) {
2603 if(width == 1 &&
2604 (ascii == '\a' || ascii == 030 ||
2605 ascii == 032 || ascii == 033 ||
2606 ISCONTROLC1(unicodep))) {
2607 term.esc &= ~(ESC_START|ESC_STR);
2608 term.esc |= ESC_STR_END;
2609 } else if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2610 memmove(&strescseq.buf[strescseq.len], c, len);
2611 strescseq.len += len;
2612 return;
2613 } else {
2614 /*
2615 * Here is a bug in terminals. If the user never sends
2616 * some code to stop the str or esc command, then st
2617 * will stop responding. But this is better than
2618 * silently failing with unknown characters. At least
2619 * then users will report back.
2620 *
2621 * In the case users ever get fixed, here is the code:
2622 */
2623 /*
2624 * term.esc = 0;
2625 * strhandle();
2626 */
2627 return;
2628 }
2629 }
2630
2631 /*
2632 * Actions of control codes must be performed as soon they arrive
2633 * because they can be embedded inside a control sequence, and
2634 * they must not cause conflicts with sequences.
2635 */
2636 if(control) {
2637 tcontrolcode(ascii);
2638 /*
2639 * control codes are not shown ever
2640 */
2641 return;
2642 } else if(term.esc & ESC_START) {
2643 if(term.esc & ESC_CSI) {
2644 csiescseq.buf[csiescseq.len++] = ascii;
2645 if(BETWEEN(ascii, 0x40, 0x7E)
2646 || csiescseq.len >= \
2647 sizeof(csiescseq.buf)-1) {
2648 term.esc = 0;
2649 csiparse();
2650 csihandle();
2651 }
2652 return;
2653 } else if(term.esc & ESC_ALTCHARSET) {
2654 tdeftran(ascii);
2655 } else if(term.esc & ESC_TEST) {
2656 tdectest(ascii);
2657 } else {
2658 if (!eschandle(ascii))
2659 return;
2660 /* sequence already finished */
2661 }
2662 term.esc = 0;
2663 /*
2664 * All characters which form part of a sequence are not
2665 * printed
2666 */
2667 return;
2668 }
2669 if(sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
2670 selclear(NULL);
2671
2672 gp = &term.line[term.c.y][term.c.x];
2673 if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2674 gp->mode |= ATTR_WRAP;
2675 tnewline(1);
2676 }
2677
2678 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col)
2679 memmove(gp+1, gp, (term.col - term.c.x - 1) * sizeof(Glyph));
2680
2681 if(term.c.x+width > term.col)
2682 tnewline(1);
2683
2684 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2685
2686 if(width == 2) {
2687 gp->mode |= ATTR_WIDE;
2688 if(term.c.x+1 < term.col) {
2689 gp[1].c[0] = '\0';
2690 gp[1].mode = ATTR_WDUMMY;
2691 }
2692 }
2693 if(term.c.x+width < term.col) {
2694 tmoveto(term.c.x+width, term.c.y);
2695 } else {
2696 term.c.state |= CURSOR_WRAPNEXT;
2697 }
2698 }
2699
2700 void
2701 tresize(int col, int row) {
2702 int i;
2703 int minrow = MIN(row, term.row);
2704 int mincol = MIN(col, term.col);
2705 int slide = term.c.y - row + 1;
2706 bool *bp;
2707 TCursor c;
2708
2709 if(col < 1 || row < 1) {
2710 fprintf(stderr,
2711 "tresize: error resizing to %dx%d\n", col, row);
2712 return;
2713 }
2714
2715 /* free unneeded rows */
2716 i = 0;
2717 if(slide > 0) {
2718 /*
2719 * slide screen to keep cursor where we expect it -
2720 * tscrollup would work here, but we can optimize to
2721 * memmove because we're freeing the earlier lines
2722 */
2723 for(/* i = 0 */; i < slide; i++) {
2724 free(term.line[i]);
2725 free(term.alt[i]);
2726 }
2727 memmove(term.line, term.line + slide, row * sizeof(Line));
2728 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2729 }
2730 for(i += row; i < term.row; i++) {
2731 free(term.line[i]);
2732 free(term.alt[i]);
2733 }
2734
2735 /* resize to new height */
2736 term.line = xrealloc(term.line, row * sizeof(Line));
2737 term.alt = xrealloc(term.alt, row * sizeof(Line));
2738 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2739 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2740
2741 /* resize each row to new width, zero-pad if needed */
2742 for(i = 0; i < minrow; i++) {
2743 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2744 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2745 }
2746
2747 /* allocate any new rows */
2748 for(/* i == minrow */; i < row; i++) {
2749 term.line[i] = xmalloc(col * sizeof(Glyph));
2750 term.alt[i] = xmalloc(col * sizeof(Glyph));
2751 }
2752 if(col > term.col) {
2753 bp = term.tabs + term.col;
2754
2755 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2756 while(--bp > term.tabs && !*bp)
2757 /* nothing */ ;
2758 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2759 *bp = 1;
2760 }
2761 /* update terminal size */
2762 term.col = col;
2763 term.row = row;
2764 /* reset scrolling region */
2765 tsetscroll(0, row-1);
2766 /* make use of the LIMIT in tmoveto */
2767 tmoveto(term.c.x, term.c.y);
2768 /* Clearing both screens (it makes dirty all lines) */
2769 c = term.c;
2770 for(i = 0; i < 2; i++) {
2771 if(mincol < col && 0 < minrow) {
2772 tclearregion(mincol, 0, col - 1, minrow - 1);
2773 }
2774 if(0 < col && minrow < row) {
2775 tclearregion(0, minrow, col - 1, row - 1);
2776 }
2777 tswapscreen();
2778 tcursor(CURSOR_LOAD);
2779 }
2780 term.c = c;
2781 }
2782
2783 void
2784 xresize(int col, int row) {
2785 xw.tw = MAX(1, col * xw.cw);
2786 xw.th = MAX(1, row * xw.ch);
2787
2788 XFreePixmap(xw.dpy, xw.buf);
2789 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2790 DefaultDepth(xw.dpy, xw.scr));
2791 XftDrawChange(xw.draw, xw.buf);
2792 xclear(0, 0, xw.w, xw.h);
2793 }
2794
2795 static inline ushort
2796 sixd_to_16bit(int x) {
2797 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2798 }
2799
2800 void
2801 xloadcols(void) {
2802 int i;
2803 XRenderColor color = { .alpha = 0xffff };
2804 static bool loaded;
2805 Color *cp;
2806
2807 if(loaded) {
2808 for (cp = dc.col; cp < dc.col + LEN(dc.col); ++cp)
2809 XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
2810 }
2811
2812 /* load colors [0-15] and [256-LEN(colorname)] (config.h) */
2813 for(i = 0; i < LEN(colorname); i++) {
2814 if(!colorname[i])
2815 continue;
2816 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2817 die("Could not allocate color '%s'\n", colorname[i]);
2818 }
2819 }
2820
2821 /* load colors [16-231] ; same colors as xterm */
2822 for(i = 16; i < 6*6*6+16; i++) {
2823 color.red = sixd_to_16bit( ((i-16)/36)%6 );
2824 color.green = sixd_to_16bit( ((i-16)/6) %6 );
2825 color.blue = sixd_to_16bit( ((i-16)/1) %6 );
2826 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i]))
2827 die("Could not allocate color %d\n", i);
2828 }
2829
2830 /* load colors [232-255] ; grayscale */
2831 for(; i < 256; i++) {
2832 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (i-(6*6*6+16));
2833 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i]))
2834 die("Could not allocate color %d\n", i);
2835 }
2836 loaded = true;
2837 }
2838
2839 int
2840 xsetcolorname(int x, const char *name) {
2841 XRenderColor color = { .alpha = 0xffff };
2842 Color ncolor;
2843
2844 if(!BETWEEN(x, 0, LEN(colorname)))
2845 return 1;
2846
2847 if(!name) {
2848 if(BETWEEN(x, 16, 16 + 215)) { /* 256 color */
2849 color.red = sixd_to_16bit( ((x-16)/36)%6 );
2850 color.green = sixd_to_16bit( ((x-16)/6) %6 );
2851 color.blue = sixd_to_16bit( ((x-16)/1) %6 );
2852 if(!XftColorAllocValue(xw.dpy, xw.vis,
2853 xw.cmap, &color, &ncolor)) {
2854 return 1;
2855 }
2856
2857 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2858 dc.col[x] = ncolor;
2859 return 0;
2860 } else if(BETWEEN(x, 16 + 216, 255)) { /* greyscale */
2861 color.red = color.green = color.blue = \
2862 0x0808 + 0x0a0a * (x - (16 + 216));
2863 if(!XftColorAllocValue(xw.dpy, xw.vis,
2864 xw.cmap, &color, &ncolor)) {
2865 return 1;
2866 }
2867
2868 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2869 dc.col[x] = ncolor;
2870 return 0;
2871 } else { /* system colors */
2872 name = colorname[x];
2873 }
2874 }
2875 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &ncolor))
2876 return 1;
2877
2878 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2879 dc.col[x] = ncolor;
2880 return 0;
2881 }
2882
2883 void
2884 xtermclear(int col1, int row1, int col2, int row2) {
2885 XftDrawRect(xw.draw,
2886 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2887 borderpx + col1 * xw.cw,
2888 borderpx + row1 * xw.ch,
2889 (col2-col1+1) * xw.cw,
2890 (row2-row1+1) * xw.ch);
2891 }
2892
2893 /*
2894 * Absolute coordinates.
2895 */
2896 void
2897 xclear(int x1, int y1, int x2, int y2) {
2898 XftDrawRect(xw.draw,
2899 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2900 x1, y1, x2-x1, y2-y1);
2901 }
2902
2903 void
2904 xhints(void) {
2905 XClassHint class = {opt_class ? opt_class : termname, termname};
2906 XWMHints wm = {.flags = InputHint, .input = 1};
2907 XSizeHints *sizeh = NULL;
2908
2909 sizeh = XAllocSizeHints();
2910
2911 sizeh->flags = PSize | PResizeInc | PBaseSize;
2912 sizeh->height = xw.h;
2913 sizeh->width = xw.w;
2914 sizeh->height_inc = xw.ch;
2915 sizeh->width_inc = xw.cw;
2916 sizeh->base_height = 2 * borderpx;
2917 sizeh->base_width = 2 * borderpx;
2918 if(xw.isfixed == True) {
2919 sizeh->flags |= PMaxSize | PMinSize;
2920 sizeh->min_width = sizeh->max_width = xw.w;
2921 sizeh->min_height = sizeh->max_height = xw.h;
2922 }
2923 if(xw.gm & (XValue|YValue)) {
2924 sizeh->flags |= USPosition | PWinGravity;
2925 sizeh->x = xw.l;
2926 sizeh->y = xw.t;
2927 sizeh->win_gravity = xgeommasktogravity(xw.gm);
2928 }
2929
2930 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
2931 &class);
2932 XFree(sizeh);
2933 }
2934
2935 int
2936 xgeommasktogravity(int mask) {
2937 switch(mask & (XNegative|YNegative)) {
2938 case 0:
2939 return NorthWestGravity;
2940 case XNegative:
2941 return NorthEastGravity;
2942 case YNegative:
2943 return SouthWestGravity;
2944 }
2945 return SouthEastGravity;
2946 }
2947
2948 int
2949 xloadfont(Font *f, FcPattern *pattern) {
2950 FcPattern *match;
2951 FcResult result;
2952
2953 match = FcFontMatch(NULL, pattern, &result);
2954 if(!match)
2955 return 1;
2956
2957 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2958 FcPatternDestroy(match);
2959 return 1;
2960 }
2961
2962 f->set = NULL;
2963 f->pattern = FcPatternDuplicate(pattern);
2964
2965 f->ascent = f->match->ascent;
2966 f->descent = f->match->descent;
2967 f->lbearing = 0;
2968 f->rbearing = f->match->max_advance_width;
2969
2970 f->height = f->ascent + f->descent;
2971 f->width = f->lbearing + f->rbearing;
2972
2973 return 0;
2974 }
2975
2976 void
2977 xloadfonts(char *fontstr, double fontsize) {
2978 FcPattern *pattern;
2979 FcResult r_sz, r_psz;
2980 double fontval;
2981 float ceilf(float);
2982
2983 if(fontstr[0] == '-') {
2984 pattern = XftXlfdParse(fontstr, False, False);
2985 } else {
2986 pattern = FcNameParse((FcChar8 *)fontstr);
2987 }
2988
2989 if(!pattern)
2990 die("st: can't open font %s\n", fontstr);
2991
2992 if(fontsize > 0) {
2993 FcPatternDel(pattern, FC_PIXEL_SIZE);
2994 FcPatternDel(pattern, FC_SIZE);
2995 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2996 usedfontsize = fontsize;
2997 } else {
2998 r_psz = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2999 r_sz = FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval);
3000 if(r_psz == FcResultMatch) {
3001 usedfontsize = fontval;
3002 } else if(r_sz == FcResultMatch) {
3003 usedfontsize = -1;
3004 } else {
3005 /*
3006 * Default font size is 12, if none given. This is to
3007 * have a known usedfontsize value.
3008 */
3009 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
3010 usedfontsize = 12;
3011 }
3012 defaultfontsize = usedfontsize;
3013 }
3014
3015 FcConfigSubstitute(0, pattern, FcMatchPattern);
3016 FcDefaultSubstitute(pattern);
3017
3018 if(xloadfont(&dc.font, pattern))
3019 die("st: can't open font %s\n", fontstr);
3020
3021 if(usedfontsize < 0) {
3022 FcPatternGetDouble(dc.font.match->pattern,
3023 FC_PIXEL_SIZE, 0, &fontval);
3024 usedfontsize = fontval;
3025 if(fontsize == 0)
3026 defaultfontsize = fontval;
3027 }
3028
3029 /* Setting character width and height. */
3030 xw.cw = ceilf(dc.font.width * cwscale);
3031 xw.ch = ceilf(dc.font.height * chscale);
3032
3033 FcPatternDel(pattern, FC_SLANT);
3034 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
3035 if(xloadfont(&dc.ifont, pattern))
3036 die("st: can't open font %s\n", fontstr);
3037
3038 FcPatternDel(pattern, FC_WEIGHT);
3039 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
3040 if(xloadfont(&dc.ibfont, pattern))
3041 die("st: can't open font %s\n", fontstr);
3042
3043 FcPatternDel(pattern, FC_SLANT);
3044 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
3045 if(xloadfont(&dc.bfont, pattern))
3046 die("st: can't open font %s\n", fontstr);
3047
3048 FcPatternDestroy(pattern);
3049 }
3050
3051 int
3052 xloadfontset(Font *f) {
3053 FcResult result;
3054
3055 if(!(f->set = FcFontSort(0, f->pattern, FcTrue, 0, &result)))
3056 return 1;
3057 return 0;
3058 }
3059
3060 void
3061 xunloadfont(Font *f) {
3062 XftFontClose(xw.dpy, f->match);
3063 FcPatternDestroy(f->pattern);
3064 if(f->set)
3065 FcFontSetDestroy(f->set);
3066 }
3067
3068 void
3069 xunloadfonts(void) {
3070 /* Free the loaded fonts in the font cache. */
3071 while(frclen > 0)
3072 XftFontClose(xw.dpy, frc[--frclen].font);
3073
3074 xunloadfont(&dc.font);
3075 xunloadfont(&dc.bfont);
3076 xunloadfont(&dc.ifont);
3077 xunloadfont(&dc.ibfont);
3078 }
3079
3080 void
3081 xzoom(const Arg *arg) {
3082 Arg larg;
3083
3084 larg.i = usedfontsize + arg->i;
3085 xzoomabs(&larg);
3086 }
3087
3088 void
3089 xzoomabs(const Arg *arg) {
3090 xunloadfonts();
3091 xloadfonts(usedfont, arg->i);
3092 cresize(0, 0);
3093 redraw(0);
3094 xhints();
3095 }
3096
3097 void
3098 xzoomreset(const Arg *arg) {
3099 Arg larg;
3100
3101 if(defaultfontsize > 0) {
3102 larg.i = defaultfontsize;
3103 xzoomabs(&larg);
3104 }
3105 }
3106
3107 void
3108 xinit(void) {
3109 XGCValues gcvalues;
3110 Cursor cursor;
3111 Window parent;
3112 pid_t thispid = getpid();
3113
3114 if(!(xw.dpy = XOpenDisplay(NULL)))
3115 die("Can't open display\n");
3116 xw.scr = XDefaultScreen(xw.dpy);
3117 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
3118
3119 /* font */
3120 if(!FcInit())
3121 die("Could not init fontconfig.\n");
3122
3123 usedfont = (opt_font == NULL)? font : opt_font;
3124 xloadfonts(usedfont, 0);
3125
3126 /* colors */
3127 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
3128 xloadcols();
3129
3130 /* adjust fixed window geometry */
3131 xw.w = 2 * borderpx + term.col * xw.cw;
3132 xw.h = 2 * borderpx + term.row * xw.ch;
3133 if(xw.gm & XNegative)
3134 xw.l += DisplayWidth(xw.dpy, xw.scr) - xw.w - 2;
3135 if(xw.gm & YNegative)
3136 xw.t += DisplayWidth(xw.dpy, xw.scr) - xw.h - 2;
3137
3138 /* Events */
3139 xw.attrs.background_pixel = dc.col[defaultbg].pixel;
3140 xw.attrs.border_pixel = dc.col[defaultbg].pixel;
3141 xw.attrs.bit_gravity = NorthWestGravity;
3142 xw.attrs.event_mask = FocusChangeMask | KeyPressMask
3143 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
3144 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
3145 xw.attrs.colormap = xw.cmap;
3146
3147 if (!(opt_embed && (parent = strtol(opt_embed, NULL, 0))))
3148 parent = XRootWindow(xw.dpy, xw.scr);
3149 xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
3150 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
3151 xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
3152 | CWEventMask | CWColormap, &xw.attrs);
3153
3154 memset(&gcvalues, 0, sizeof(gcvalues));
3155 gcvalues.graphics_exposures = False;
3156 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
3157 &gcvalues);
3158 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
3159 DefaultDepth(xw.dpy, xw.scr));
3160 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
3161 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
3162
3163 /* Xft rendering context */
3164 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
3165
3166 /* input methods */
3167 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3168 XSetLocaleModifiers("@im=local");
3169 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3170 XSetLocaleModifiers("@im=");
3171 if((xw.xim = XOpenIM(xw.dpy,
3172 NULL, NULL, NULL)) == NULL) {
3173 die("XOpenIM failed. Could not open input"
3174 " device.\n");
3175 }
3176 }
3177 }
3178 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
3179 | XIMStatusNothing, XNClientWindow, xw.win,
3180 XNFocusWindow, xw.win, NULL);
3181 if(xw.xic == NULL)
3182 die("XCreateIC failed. Could not obtain input method.\n");
3183
3184 /* white cursor, black outline */
3185 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
3186 XDefineCursor(xw.dpy, xw.win, cursor);
3187 XRecolorCursor(xw.dpy, cursor,
3188 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
3189 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
3190
3191 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
3192 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
3193 xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
3194 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
3195
3196 xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
3197 XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
3198 PropModeReplace, (uchar *)&thispid, 1);
3199
3200 xresettitle();
3201 XMapWindow(xw.dpy, xw.win);
3202 xhints();
3203 XSync(xw.dpy, False);
3204 }
3205
3206 void
3207 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
3208 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
3209 width = charlen * xw.cw, xp, i;
3210 int frcflags;
3211 int u8fl, u8fblen, u8cblen, doesexist;
3212 char *u8c, *u8fs;
3213 long unicodep;
3214 Font *font = &dc.font;
3215 FcResult fcres;
3216 FcPattern *fcpattern, *fontpattern;
3217 FcFontSet *fcsets[] = { NULL };
3218 FcCharSet *fccharset;
3219 Color *fg, *bg, *temp, revfg, revbg, truefg, truebg;
3220 XRenderColor colfg, colbg;
3221 XRectangle r;
3222 int oneatatime;
3223
3224 frcflags = FRC_NORMAL;
3225
3226 if(base.mode & ATTR_ITALIC) {
3227 if(base.fg == defaultfg)
3228 base.fg = defaultitalic;
3229 font = &dc.ifont;
3230 frcflags = FRC_ITALIC;
3231 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
3232 if(base.fg == defaultfg)
3233 base.fg = defaultitalic;
3234 font = &dc.ibfont;
3235 frcflags = FRC_ITALICBOLD;
3236 } else if(base.mode & ATTR_UNDERLINE) {
3237 if(base.fg == defaultfg)
3238 base.fg = defaultunderline;
3239 }
3240
3241 if(IS_TRUECOL(base.fg)) {
3242 colfg.alpha = 0xffff;
3243 colfg.red = TRUERED(base.fg);
3244 colfg.green = TRUEGREEN(base.fg);
3245 colfg.blue = TRUEBLUE(base.fg);
3246 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
3247 fg = &truefg;
3248 } else {
3249 fg = &dc.col[base.fg];
3250 }
3251
3252 if(IS_TRUECOL(base.bg)) {
3253 colbg.alpha = 0xffff;
3254 colbg.green = TRUEGREEN(base.bg);
3255 colbg.red = TRUERED(base.bg);
3256 colbg.blue = TRUEBLUE(base.bg);
3257 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
3258 bg = &truebg;
3259 } else {
3260 bg = &dc.col[base.bg];
3261 }
3262
3263 if(base.mode & ATTR_BOLD) {
3264 /*
3265 * change basic system colors [0-7]
3266 * to bright system colors [8-15]
3267 */
3268 if(BETWEEN(base.fg, 0, 7) && !(base.mode & ATTR_FAINT))
3269 fg = &dc.col[base.fg + 8];
3270
3271 if(base.mode & ATTR_ITALIC) {
3272 font = &dc.ibfont;
3273 frcflags = FRC_ITALICBOLD;
3274 } else {
3275 font = &dc.bfont;
3276 frcflags = FRC_BOLD;
3277 }
3278 }
3279
3280 if(IS_SET(MODE_REVERSE)) {
3281 if(fg == &dc.col[defaultfg]) {
3282 fg = &dc.col[defaultbg];
3283 } else {
3284 colfg.red = ~fg->color.red;
3285 colfg.green = ~fg->color.green;
3286 colfg.blue = ~fg->color.blue;
3287 colfg.alpha = fg->color.alpha;
3288 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
3289 &revfg);
3290 fg = &revfg;
3291 }
3292
3293 if(bg == &dc.col[defaultbg]) {
3294 bg = &dc.col[defaultfg];
3295 } else {
3296 colbg.red = ~bg->color.red;
3297 colbg.green = ~bg->color.green;
3298 colbg.blue = ~bg->color.blue;
3299 colbg.alpha = bg->color.alpha;
3300 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
3301 &revbg);
3302 bg = &revbg;
3303 }
3304 }
3305
3306 if(base.mode & ATTR_REVERSE) {
3307 temp = fg;
3308 fg = bg;
3309 bg = temp;
3310 }
3311
3312 if(base.mode & ATTR_FAINT && !(base.mode & ATTR_BOLD)) {
3313 colfg.red = fg->color.red / 2;
3314 colfg.green = fg->color.green / 2;
3315 colfg.blue = fg->color.blue / 2;
3316 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
3317 fg = &revfg;
3318 }
3319
3320 if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
3321 fg = bg;
3322
3323 if(base.mode & ATTR_INVISIBLE)
3324 fg = bg;
3325
3326 /* Intelligent cleaning up of the borders. */
3327 if(x == 0) {
3328 xclear(0, (y == 0)? 0 : winy, borderpx,
3329 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
3330 }
3331 if(x + charlen >= term.col) {
3332 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
3333 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
3334 }
3335 if(y == 0)
3336 xclear(winx, 0, winx + width, borderpx);
3337 if(y == term.row-1)
3338 xclear(winx, winy + xw.ch, winx + width, xw.h);
3339
3340 /* Clean up the region we want to draw to. */
3341 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
3342
3343 /* Set the clip region because Xft is sometimes dirty. */
3344 r.x = 0;
3345 r.y = 0;
3346 r.height = xw.ch;
3347 r.width = width;
3348 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
3349
3350 for(xp = winx; bytelen > 0;) {
3351 /*
3352 * Search for the range in the to be printed string of glyphs
3353 * that are in the main font. Then print that range. If
3354 * some glyph is found that is not in the font, do the
3355 * fallback dance.
3356 */
3357 u8fs = s;
3358 u8fblen = 0;
3359 u8fl = 0;
3360 oneatatime = font->width != xw.cw;
3361 for(;;) {
3362 u8c = s;
3363 u8cblen = utf8decode(s, &unicodep, UTF_SIZ);
3364 s += u8cblen;
3365 bytelen -= u8cblen;
3366
3367 doesexist = XftCharExists(xw.dpy, font->match, unicodep);
3368 if(doesexist) {
3369 u8fl++;
3370 u8fblen += u8cblen;
3371 if(!oneatatime && bytelen > 0)
3372 continue;
3373 }
3374
3375 if(u8fl > 0) {
3376 XftDrawStringUtf8(xw.draw, fg,
3377 font->match, xp,
3378 winy + font->ascent,
3379 (FcChar8 *)u8fs,
3380 u8fblen);
3381 xp += xw.cw * u8fl;
3382 }
3383 break;
3384 }
3385 if(doesexist) {
3386 if(oneatatime)
3387 continue;
3388 break;
3389 }
3390
3391 /* Search the font cache. */
3392 for(i = 0; i < frclen; i++) {
3393 if(XftCharExists(xw.dpy, frc[i].font, unicodep)
3394 && frc[i].flags == frcflags) {
3395 break;
3396 }
3397 }
3398
3399 /* Nothing was found. */
3400 if(i >= frclen) {
3401 if(!font->set)
3402 xloadfontset(font);
3403 fcsets[0] = font->set;
3404
3405 /*
3406 * Nothing was found in the cache. Now use
3407 * some dozen of Fontconfig calls to get the
3408 * font for one single character.
3409 *
3410 * Xft and fontconfig are design failures.
3411 */
3412 fcpattern = FcPatternDuplicate(font->pattern);
3413 fccharset = FcCharSetCreate();
3414
3415 FcCharSetAddChar(fccharset, unicodep);
3416 FcPatternAddCharSet(fcpattern, FC_CHARSET,
3417 fccharset);
3418 FcPatternAddBool(fcpattern, FC_SCALABLE,
3419 FcTrue);
3420
3421 FcConfigSubstitute(0, fcpattern,
3422 FcMatchPattern);
3423 FcDefaultSubstitute(fcpattern);
3424
3425 fontpattern = FcFontSetMatch(0, fcsets,
3426 FcTrue, fcpattern, &fcres);
3427
3428 /*
3429 * Overwrite or create the new cache entry.
3430 */
3431 if(frclen >= LEN(frc)) {
3432 frclen = LEN(frc) - 1;
3433 XftFontClose(xw.dpy, frc[frclen].font);
3434 }
3435
3436 frc[frclen].font = XftFontOpenPattern(xw.dpy,
3437 fontpattern);
3438 frc[frclen].flags = frcflags;
3439
3440 i = frclen;
3441 frclen++;
3442
3443 FcPatternDestroy(fcpattern);
3444 FcCharSetDestroy(fccharset);
3445 }
3446
3447 XftDrawStringUtf8(xw.draw, fg, frc[i].font,
3448 xp, winy + frc[i].font->ascent,
3449 (FcChar8 *)u8c, u8cblen);
3450
3451 xp += xw.cw * wcwidth(unicodep);
3452 }
3453
3454 /*
3455 * This is how the loop above actually should be. Why does the
3456 * application have to care about font details?
3457 *
3458 * I have to repeat: Xft and Fontconfig are design failures.
3459 */
3460 /*
3461 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
3462 winy + font->ascent, (FcChar8 *)s, bytelen);
3463 */
3464
3465 if(base.mode & ATTR_UNDERLINE) {
3466 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
3467 width, 1);
3468 }
3469
3470 if(base.mode & ATTR_STRUCK) {
3471 XftDrawRect(xw.draw, fg, winx, winy + 2 * font->ascent / 3,
3472 width, 1);
3473 }
3474
3475 /* Reset clip to none. */
3476 XftDrawSetClip(xw.draw, 0);
3477 }
3478
3479 void
3480 xdrawcursor(void) {
3481 static int oldx = 0, oldy = 0;
3482 int sl, width, curx;
3483 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
3484
3485 LIMIT(oldx, 0, term.col-1);
3486 LIMIT(oldy, 0, term.row-1);
3487
3488 curx = term.c.x;
3489
3490 /* adjust position if in dummy */
3491 if(term.line[oldy][oldx].mode & ATTR_WDUMMY)
3492 oldx--;
3493 if(term.line[term.c.y][curx].mode & ATTR_WDUMMY)
3494 curx--;
3495
3496 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
3497
3498 /* remove the old cursor */
3499 sl = utf8len(term.line[oldy][oldx].c);
3500 width = (term.line[oldy][oldx].mode & ATTR_WIDE)? 2 : 1;
3501 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
3502 oldy, width, sl);
3503
3504 if(IS_SET(MODE_HIDE))
3505 return;
3506
3507 /* draw the new one */
3508 if(xw.state & WIN_FOCUSED) {
3509 if(IS_SET(MODE_REVERSE)) {
3510 g.mode |= ATTR_REVERSE;
3511 g.fg = defaultcs;
3512 g.bg = defaultfg;
3513 }
3514
3515 sl = utf8len(g.c);
3516 width = (term.line[term.c.y][curx].mode & ATTR_WIDE)\
3517 ? 2 : 1;
3518 xdraws(g.c, g, term.c.x, term.c.y, width, sl);
3519 } else {
3520 XftDrawRect(xw.draw, &dc.col[defaultcs],
3521 borderpx + curx * xw.cw,
3522 borderpx + term.c.y * xw.ch,
3523 xw.cw - 1, 1);
3524 XftDrawRect(xw.draw, &dc.col[defaultcs],
3525 borderpx + curx * xw.cw,
3526 borderpx + term.c.y * xw.ch,
3527 1, xw.ch - 1);
3528 XftDrawRect(xw.draw, &dc.col[defaultcs],
3529 borderpx + (curx + 1) * xw.cw - 1,
3530 borderpx + term.c.y * xw.ch,
3531 1, xw.ch - 1);
3532 XftDrawRect(xw.draw, &dc.col[defaultcs],
3533 borderpx + curx * xw.cw,
3534 borderpx + (term.c.y + 1) * xw.ch - 1,
3535 xw.cw, 1);
3536 }
3537 oldx = curx, oldy = term.c.y;
3538 }
3539
3540
3541 void
3542 xsettitle(char *p) {
3543 XTextProperty prop;
3544
3545 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3546 &prop);
3547 XSetWMName(xw.dpy, xw.win, &prop);
3548 XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
3549 XFree(prop.value);
3550 }
3551
3552 void
3553 xresettitle(void) {
3554 xsettitle(opt_title ? opt_title : "st");
3555 }
3556
3557 void
3558 redraw(int timeout) {
3559 struct timespec tv = {0, timeout * 1000};
3560
3561 tfulldirt();
3562 draw();
3563
3564 if(timeout > 0) {
3565 nanosleep(&tv, NULL);
3566 XSync(xw.dpy, False); /* necessary for a good tput flash */
3567 }
3568 }
3569
3570 void
3571 draw(void) {
3572 drawregion(0, 0, term.col, term.row);
3573 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3574 xw.h, 0, 0);
3575 XSetForeground(xw.dpy, dc.gc,
3576 dc.col[IS_SET(MODE_REVERSE)?
3577 defaultfg : defaultbg].pixel);
3578 }
3579
3580 void
3581 drawregion(int x1, int y1, int x2, int y2) {
3582 int ic, ib, x, y, ox, sl;
3583 Glyph base, new;
3584 char buf[DRAW_BUF_SIZ];
3585 bool ena_sel = sel.ob.x != -1 && sel.alt == IS_SET(MODE_ALTSCREEN);
3586 long unicodep;
3587
3588 if(!(xw.state & WIN_VISIBLE))
3589 return;
3590
3591 for(y = y1; y < y2; y++) {
3592 if(!term.dirty[y])
3593 continue;
3594
3595 xtermclear(0, y, term.col, y);
3596 term.dirty[y] = 0;
3597 base = term.line[y][0];
3598 ic = ib = ox = 0;
3599 for(x = x1; x < x2; x++) {
3600 new = term.line[y][x];
3601 if(new.mode == ATTR_WDUMMY)
3602 continue;
3603 if(ena_sel && selected(x, y))
3604 new.mode ^= ATTR_REVERSE;
3605 if(ib > 0 && (ATTRCMP(base, new)
3606 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3607 xdraws(buf, base, ox, y, ic, ib);
3608 ic = ib = 0;
3609 }
3610 if(ib == 0) {
3611 ox = x;
3612 base = new;
3613 }
3614
3615 sl = utf8decode(new.c, &unicodep, UTF_SIZ);
3616 memcpy(buf+ib, new.c, sl);
3617 ib += sl;
3618 ic += (new.mode & ATTR_WIDE)? 2 : 1;
3619 }
3620 if(ib > 0)
3621 xdraws(buf, base, ox, y, ic, ib);
3622 }
3623 xdrawcursor();
3624 }
3625
3626 void
3627 expose(XEvent *ev) {
3628 XExposeEvent *e = &ev->xexpose;
3629
3630 if(xw.state & WIN_REDRAW) {
3631 if(!e->count)
3632 xw.state &= ~WIN_REDRAW;
3633 }
3634 redraw(0);
3635 }
3636
3637 void
3638 visibility(XEvent *ev) {
3639 XVisibilityEvent *e = &ev->xvisibility;
3640
3641 if(e->state == VisibilityFullyObscured) {
3642 xw.state &= ~WIN_VISIBLE;
3643 } else if(!(xw.state & WIN_VISIBLE)) {
3644 /* need a full redraw for next Expose, not just a buf copy */
3645 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3646 }
3647 }
3648
3649 void
3650 unmap(XEvent *ev) {
3651 xw.state &= ~WIN_VISIBLE;
3652 }
3653
3654 void
3655 xsetpointermotion(int set) {
3656 MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
3657 XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
3658 }
3659
3660 void
3661 xseturgency(int add) {
3662 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3663
3664 MODBIT(h->flags, add, XUrgencyHint);
3665 XSetWMHints(xw.dpy, xw.win, h);
3666 XFree(h);
3667 }
3668
3669 void
3670 focus(XEvent *ev) {
3671 XFocusChangeEvent *e = &ev->xfocus;
3672
3673 if(e->mode == NotifyGrab)
3674 return;
3675
3676 if(ev->type == FocusIn) {
3677 XSetICFocus(xw.xic);
3678 xw.state |= WIN_FOCUSED;
3679 xseturgency(0);
3680 if(IS_SET(MODE_FOCUS))
3681 ttywrite("\033[I", 3);
3682 } else {
3683 XUnsetICFocus(xw.xic);
3684 xw.state &= ~WIN_FOCUSED;
3685 if(IS_SET(MODE_FOCUS))
3686 ttywrite("\033[O", 3);
3687 }
3688 }
3689
3690 static inline bool
3691 match(uint mask, uint state) {
3692 return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
3693 }
3694
3695 void
3696 numlock(const Arg *dummy) {
3697 term.numlock ^= 1;
3698 }
3699
3700 char*
3701 kmap(KeySym k, uint state) {
3702 Key *kp;
3703 int i;
3704
3705 /* Check for mapped keys out of X11 function keys. */
3706 for(i = 0; i < LEN(mappedkeys); i++) {
3707 if(mappedkeys[i] == k)
3708 break;
3709 }
3710 if(i == LEN(mappedkeys)) {
3711 if((k & 0xFFFF) < 0xFD00)
3712 return NULL;
3713 }
3714
3715 for(kp = key; kp < key + LEN(key); kp++) {
3716 if(kp->k != k)
3717 continue;
3718
3719 if(!match(kp->mask, state))
3720 continue;
3721
3722 if(IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
3723 continue;
3724 if(term.numlock && kp->appkey == 2)
3725 continue;
3726
3727 if(IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
3728 continue;
3729
3730 if(IS_SET(MODE_CRLF) ? kp->crlf < 0 : kp->crlf > 0)
3731 continue;
3732
3733 return kp->s;
3734 }
3735
3736 return NULL;
3737 }
3738
3739 void
3740 kpress(XEvent *ev) {
3741 XKeyEvent *e = &ev->xkey;
3742 KeySym ksym;
3743 char buf[32], *customkey;
3744 int len;
3745 long c;
3746 Status status;
3747 Shortcut *bp;
3748
3749 if(IS_SET(MODE_KBDLOCK))
3750 return;
3751
3752 len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
3753 /* 1. shortcuts */
3754 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3755 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3756 bp->func(&(bp->arg));
3757 return;
3758 }
3759 }
3760
3761 /* 2. custom keys from config.h */
3762 if((customkey = kmap(ksym, e->state))) {
3763 ttysend(customkey, strlen(customkey));
3764 return;
3765 }
3766
3767 /* 3. composed string from input method */
3768 if(len == 0)
3769 return;
3770 if(len == 1 && e->state & Mod1Mask) {
3771 if(IS_SET(MODE_8BIT)) {
3772 if(*buf < 0177) {
3773 c = *buf | 0x80;
3774 len = utf8encode(c, buf, UTF_SIZ);
3775 }
3776 } else {
3777 buf[1] = buf[0];
3778 buf[0] = '\033';
3779 len = 2;
3780 }
3781 }
3782 ttysend(buf, len);
3783 }
3784
3785
3786 void
3787 cmessage(XEvent *e) {
3788 /*
3789 * See xembed specs
3790 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3791 */
3792 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3793 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3794 xw.state |= WIN_FOCUSED;
3795 xseturgency(0);
3796 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3797 xw.state &= ~WIN_FOCUSED;
3798 }
3799 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3800 /* Send SIGHUP to shell */
3801 kill(pid, SIGHUP);
3802 exit(EXIT_SUCCESS);
3803 }
3804 }
3805
3806 void
3807 cresize(int width, int height) {
3808 int col, row;
3809
3810 if(width != 0)
3811 xw.w = width;
3812 if(height != 0)
3813 xw.h = height;
3814
3815 col = (xw.w - 2 * borderpx) / xw.cw;
3816 row = (xw.h - 2 * borderpx) / xw.ch;
3817
3818 tresize(col, row);
3819 xresize(col, row);
3820 ttyresize();
3821 }
3822
3823 void
3824 resize(XEvent *e) {
3825 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3826 return;
3827
3828 cresize(e->xconfigure.width, e->xconfigure.height);
3829 }
3830
3831 void
3832 run(void) {
3833 XEvent ev;
3834 int w = xw.w, h = xw.h;
3835 fd_set rfd;
3836 int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3837 struct timespec drawtimeout, *tv = NULL, now, last, lastblink;
3838 long deltatime;
3839
3840 /* Waiting for window mapping */
3841 while(1) {
3842 XNextEvent(xw.dpy, &ev);
3843 if(XFilterEvent(&ev, None))
3844 continue;
3845 if(ev.type == ConfigureNotify) {
3846 w = ev.xconfigure.width;
3847 h = ev.xconfigure.height;
3848 } else if(ev.type == MapNotify) {
3849 break;
3850 }
3851 }
3852
3853 ttynew();
3854 cresize(w, h);
3855
3856 clock_gettime(CLOCK_MONOTONIC, &last);
3857 lastblink = last;
3858
3859 for(xev = actionfps;;) {
3860 FD_ZERO(&rfd);
3861 FD_SET(cmdfd, &rfd);
3862 FD_SET(xfd, &rfd);
3863
3864 if(pselect(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv, NULL) < 0) {
3865 if(errno == EINTR)
3866 continue;
3867 die("select failed: %s\n", strerror(errno));
3868 }
3869 if(FD_ISSET(cmdfd, &rfd)) {
3870 ttyread();
3871 if(blinktimeout) {
3872 blinkset = tattrset(ATTR_BLINK);
3873 if(!blinkset)
3874 MODBIT(term.mode, 0, MODE_BLINK);
3875 }
3876 }
3877
3878 if(FD_ISSET(xfd, &rfd))
3879 xev = actionfps;
3880
3881 clock_gettime(CLOCK_MONOTONIC, &now);
3882 drawtimeout.tv_sec = 0;
3883 drawtimeout.tv_nsec = (1000/xfps) * 1E6;
3884 tv = &drawtimeout;
3885
3886 dodraw = 0;
3887 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
3888 tsetdirtattr(ATTR_BLINK);
3889 term.mode ^= MODE_BLINK;
3890 lastblink = now;
3891 dodraw = 1;
3892 }
3893 deltatime = TIMEDIFF(now, last);
3894 if(deltatime > (xev? (1000/xfps) : (1000/actionfps))
3895 || deltatime < 0) {
3896 dodraw = 1;
3897 last = now;
3898 }
3899
3900 if(dodraw) {
3901 while(XPending(xw.dpy)) {
3902 XNextEvent(xw.dpy, &ev);
3903 if(XFilterEvent(&ev, None))
3904 continue;
3905 if(handler[ev.type])
3906 (handler[ev.type])(&ev);
3907 }
3908
3909 draw();
3910 XFlush(xw.dpy);
3911
3912 if(xev && !FD_ISSET(xfd, &rfd))
3913 xev--;
3914 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
3915 if(blinkset) {
3916 if(TIMEDIFF(now, lastblink) \
3917 > blinktimeout) {
3918 drawtimeout.tv_nsec = 1000;
3919 } else {
3920 drawtimeout.tv_nsec = (1E6 * \
3921 (blinktimeout - \
3922 TIMEDIFF(now,
3923 lastblink)));
3924 }
3925 drawtimeout.tv_sec = \
3926 drawtimeout.tv_nsec / 1E9;
3927 drawtimeout.tv_nsec %= (long)1E9;
3928 } else {
3929 tv = NULL;
3930 }
3931 }
3932 }
3933 }
3934 }
3935
3936 void
3937 usage(void) {
3938 die("%s " VERSION " (c) 2010-2014 st engineers\n" \
3939 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]\n"
3940 " [-i] [-t title] [-w windowid] [-e command ...]\n", argv0);
3941 }
3942
3943 int
3944 main(int argc, char *argv[]) {
3945 char *titles;
3946 uint cols = 80, rows = 24;
3947
3948 xw.l = xw.t = 0;
3949 xw.isfixed = False;
3950
3951 ARGBEGIN {
3952 case 'a':
3953 allowaltscreen = false;
3954 break;
3955 case 'c':
3956 opt_class = EARGF(usage());
3957 break;
3958 case 'e':
3959 /* eat all remaining arguments */
3960 if(argc > 1) {
3961 opt_cmd = &argv[1];
3962 if(argv[1] != NULL && opt_title == NULL) {
3963 titles = xstrdup(argv[1]);
3964 opt_title = basename(titles);
3965 }
3966 }
3967 goto run;
3968 case 'f':
3969 opt_font = EARGF(usage());
3970 break;
3971 case 'g':
3972 xw.gm = XParseGeometry(EARGF(usage()),
3973 &xw.l, &xw.t, &cols, &rows);
3974 break;
3975 case 'i':
3976 xw.isfixed = True;
3977 break;
3978 case 'o':
3979 opt_io = EARGF(usage());
3980 break;
3981 case 't':
3982 opt_title = EARGF(usage());
3983 break;
3984 case 'w':
3985 opt_embed = EARGF(usage());
3986 break;
3987 case 'v':
3988 default:
3989 usage();
3990 } ARGEND;
3991
3992 run:
3993 setlocale(LC_CTYPE, "");
3994 XSetLocaleModifiers("");
3995 tnew(cols? cols : 1, rows? rows : 1);
3996 xinit();
3997 selinit();
3998 run();
3999
4000 return 0;
4001 }
4002