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