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[st.git] / st.c
1 /* See LICENSE for licence details. */
2 #include <ctype.h>
3 #include <errno.h>
4 #include <fcntl.h>
5 #include <limits.h>
6 #include <locale.h>
7 #include <pwd.h>
8 #include <stdarg.h>
9 #include <stdbool.h>
10 #include <stdio.h>
11 #include <stdlib.h>
12 #include <string.h>
13 #include <signal.h>
14 #include <stdint.h>
15 #include <sys/ioctl.h>
16 #include <sys/select.h>
17 #include <sys/stat.h>
18 #include <sys/time.h>
19 #include <sys/types.h>
20 #include <sys/wait.h>
21 #include <time.h>
22 #include <unistd.h>
23 #include <libgen.h>
24 #include <X11/Xatom.h>
25 #include <X11/Xlib.h>
26 #include <X11/Xutil.h>
27 #include <X11/cursorfont.h>
28 #include <X11/keysym.h>
29 #include <X11/Xft/Xft.h>
30 #include <X11/XKBlib.h>
31 #include <fontconfig/fontconfig.h>
32 #include <wchar.h>
33
34 #include "arg.h"
35
36 char *argv0;
37
38 #define Glyph Glyph_
39 #define Font Font_
40
41 #if defined(__linux)
42 #include <pty.h>
43 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
44 #include <util.h>
45 #elif defined(__FreeBSD__) || defined(__DragonFly__)
46 #include <libutil.h>
47 #endif
48
49
50 /* XEMBED messages */
51 #define XEMBED_FOCUS_IN 4
52 #define XEMBED_FOCUS_OUT 5
53
54 /* Arbitrary sizes */
55 #define UTF_INVALID 0xFFFD
56 #define UTF_SIZ 4
57 #define ESC_BUF_SIZ (128*UTF_SIZ)
58 #define ESC_ARG_SIZ 16
59 #define STR_BUF_SIZ ESC_BUF_SIZ
60 #define STR_ARG_SIZ ESC_ARG_SIZ
61 #define DRAW_BUF_SIZ 20*1024
62 #define XK_ANY_MOD UINT_MAX
63 #define XK_NO_MOD 0
64 #define XK_SWITCH_MOD (1<<13)
65
66 /* macros */
67 #define MIN(a, b) ((a) < (b) ? (a) : (b))
68 #define MAX(a, b) ((a) < (b) ? (b) : (a))
69 #define LEN(a) (sizeof(a) / sizeof(a)[0])
70 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
71 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
72 #define ISCONTROLC0(c) (BETWEEN(c, 0, 0x1f) || (c) == '\177')
73 #define ISCONTROLC1(c) (BETWEEN(c, 0x80, 0x9f))
74 #define ISCONTROL(c) (ISCONTROLC0(c) || ISCONTROLC1(c))
75 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
76 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
77 #define IS_SET(flag) ((term.mode & (flag)) != 0)
78 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_nsec-t2.tv_nsec)/1E6)
79 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
80
81 #define TRUECOLOR(r,g,b) (1 << 24 | (r) << 16 | (g) << 8 | (b))
82 #define IS_TRUECOL(x) (1 << 24 & (x))
83 #define TRUERED(x) (((x) & 0xff0000) >> 8)
84 #define TRUEGREEN(x) (((x) & 0xff00))
85 #define TRUEBLUE(x) (((x) & 0xff) << 8)
86
87
88 enum glyph_attribute {
89 ATTR_NULL = 0,
90 ATTR_BOLD = 1 << 0,
91 ATTR_FAINT = 1 << 1,
92 ATTR_ITALIC = 1 << 2,
93 ATTR_UNDERLINE = 1 << 3,
94 ATTR_BLINK = 1 << 4,
95 ATTR_REVERSE = 1 << 5,
96 ATTR_INVISIBLE = 1 << 6,
97 ATTR_STRUCK = 1 << 7,
98 ATTR_WRAP = 1 << 8,
99 ATTR_WIDE = 1 << 9,
100 ATTR_WDUMMY = 1 << 10,
101 };
102
103 enum cursor_movement {
104 CURSOR_SAVE,
105 CURSOR_LOAD
106 };
107
108 enum cursor_state {
109 CURSOR_DEFAULT = 0,
110 CURSOR_WRAPNEXT = 1,
111 CURSOR_ORIGIN = 2
112 };
113
114 enum term_mode {
115 MODE_WRAP = 1 << 0,
116 MODE_INSERT = 1 << 1,
117 MODE_APPKEYPAD = 1 << 2,
118 MODE_ALTSCREEN = 1 << 3,
119 MODE_CRLF = 1 << 4,
120 MODE_MOUSEBTN = 1 << 5,
121 MODE_MOUSEMOTION = 1 << 6,
122 MODE_REVERSE = 1 << 7,
123 MODE_KBDLOCK = 1 << 8,
124 MODE_HIDE = 1 << 9,
125 MODE_ECHO = 1 << 10,
126 MODE_APPCURSOR = 1 << 11,
127 MODE_MOUSESGR = 1 << 12,
128 MODE_8BIT = 1 << 13,
129 MODE_BLINK = 1 << 14,
130 MODE_FBLINK = 1 << 15,
131 MODE_FOCUS = 1 << 16,
132 MODE_MOUSEX10 = 1 << 17,
133 MODE_MOUSEMANY = 1 << 18,
134 MODE_BRCKTPASTE = 1 << 19,
135 MODE_PRINT = 1 << 20,
136 MODE_MOUSE = MODE_MOUSEBTN|MODE_MOUSEMOTION|MODE_MOUSEX10\
137 |MODE_MOUSEMANY,
138 };
139
140 enum charset {
141 CS_GRAPHIC0,
142 CS_GRAPHIC1,
143 CS_UK,
144 CS_USA,
145 CS_MULTI,
146 CS_GER,
147 CS_FIN
148 };
149
150 enum escape_state {
151 ESC_START = 1,
152 ESC_CSI = 2,
153 ESC_STR = 4, /* DCS, OSC, PM, APC */
154 ESC_ALTCHARSET = 8,
155 ESC_STR_END = 16, /* a final string was encountered */
156 ESC_TEST = 32, /* Enter in test mode */
157 };
158
159 enum window_state {
160 WIN_VISIBLE = 1,
161 WIN_REDRAW = 2,
162 WIN_FOCUSED = 4
163 };
164
165 enum selection_type {
166 SEL_REGULAR = 1,
167 SEL_RECTANGULAR = 2
168 };
169
170 enum selection_snap {
171 SNAP_WORD = 1,
172 SNAP_LINE = 2
173 };
174
175 typedef unsigned char uchar;
176 typedef unsigned int uint;
177 typedef unsigned long ulong;
178 typedef unsigned short ushort;
179
180 typedef XftDraw *Draw;
181 typedef XftColor Color;
182
183 typedef struct {
184 char c[UTF_SIZ]; /* character code */
185 ushort mode; /* attribute flags */
186 uint32_t fg; /* foreground */
187 uint32_t bg; /* background */
188 } Glyph;
189
190 typedef Glyph *Line;
191
192 typedef struct {
193 Glyph attr; /* current char attributes */
194 int x;
195 int y;
196 char state;
197 } TCursor;
198
199 /* CSI Escape sequence structs */
200 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
201 typedef struct {
202 char buf[ESC_BUF_SIZ]; /* raw string */
203 int len; /* raw string length */
204 char priv;
205 int arg[ESC_ARG_SIZ];
206 int narg; /* nb of args */
207 char mode;
208 } CSIEscape;
209
210 /* STR Escape sequence structs */
211 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
212 typedef struct {
213 char type; /* ESC type ... */
214 char buf[STR_BUF_SIZ]; /* raw string */
215 int len; /* raw string length */
216 char *args[STR_ARG_SIZ];
217 int narg; /* nb of args */
218 } STREscape;
219
220 /* Internal representation of the screen */
221 typedef struct {
222 int row; /* nb row */
223 int col; /* nb col */
224 Line *line; /* screen */
225 Line *alt; /* alternate screen */
226 bool *dirty; /* dirtyness of lines */
227 TCursor c; /* cursor */
228 int top; /* top scroll limit */
229 int bot; /* bottom scroll limit */
230 int mode; /* terminal mode flags */
231 int esc; /* escape state flags */
232 char trantbl[4]; /* charset table translation */
233 int charset; /* current charset */
234 int icharset; /* selected charset for sequence */
235 bool numlock; /* lock numbers in keyboard */
236 bool *tabs;
237 } Term;
238
239 /* Purely graphic info */
240 typedef struct {
241 Display *dpy;
242 Colormap cmap;
243 Window win;
244 Drawable buf;
245 Atom xembed, wmdeletewin, netwmname, netwmpid;
246 XIM xim;
247 XIC xic;
248 Draw draw;
249 Visual *vis;
250 XSetWindowAttributes attrs;
251 int scr;
252 bool isfixed; /* is fixed geometry? */
253 int l, t; /* left and top offset */
254 int gm; /* geometry mask */
255 int tw, th; /* tty width and height */
256 int w, h; /* window width and height */
257 int ch; /* char height */
258 int cw; /* char width */
259 char state; /* focus, redraw, visible */
260 } XWindow;
261
262 typedef struct {
263 uint b;
264 uint mask;
265 char *s;
266 } Mousekey;
267
268 typedef struct {
269 KeySym k;
270 uint mask;
271 char *s;
272 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
273 signed char appkey; /* application keypad */
274 signed char appcursor; /* application cursor */
275 signed char crlf; /* crlf mode */
276 } Key;
277
278 typedef struct {
279 int mode;
280 int type;
281 int snap;
282 /*
283 * Selection variables:
284 * nb – normalized coordinates of the beginning of the selection
285 * ne – normalized coordinates of the end of the selection
286 * ob – original coordinates of the beginning of the selection
287 * oe – original coordinates of the end of the selection
288 */
289 struct {
290 int x, y;
291 } nb, ne, ob, oe;
292
293 char *clip;
294 Atom xtarget;
295 bool alt;
296 struct timespec tclick1;
297 struct timespec tclick2;
298 } Selection;
299
300 typedef union {
301 int i;
302 uint ui;
303 float f;
304 const void *v;
305 } Arg;
306
307 typedef struct {
308 uint mod;
309 KeySym keysym;
310 void (*func)(const Arg *);
311 const Arg arg;
312 } Shortcut;
313
314 /* function definitions used in config.h */
315 static void clippaste(const Arg *);
316 static void numlock(const Arg *);
317 static void selpaste(const Arg *);
318 static void xzoom(const Arg *);
319 static void xzoomabs(const Arg *);
320 static void xzoomreset(const Arg *);
321 static void printsel(const Arg *);
322 static void printscreen(const Arg *) ;
323 static void toggleprinter(const Arg *);
324
325 /* Config.h for applying patches and the configuration. */
326 #include "config.h"
327
328 /* Font structure */
329 typedef struct {
330 int height;
331 int width;
332 int ascent;
333 int descent;
334 short lbearing;
335 short rbearing;
336 XftFont *match;
337 FcFontSet *set;
338 FcPattern *pattern;
339 } Font;
340
341 /* Drawing Context */
342 typedef struct {
343 Color col[MAX(LEN(colorname), 256)];
344 Font font, bfont, ifont, ibfont;
345 GC gc;
346 } DC;
347
348 static void die(const char *, ...);
349 static void draw(void);
350 static void redraw(void);
351 static void drawregion(int, int, int, int);
352 static void execsh(void);
353 static void sigchld(int);
354 static void run(void);
355
356 static void csidump(void);
357 static void csihandle(void);
358 static void csiparse(void);
359 static void csireset(void);
360 static int eschandle(uchar ascii);
361 static void strdump(void);
362 static void strhandle(void);
363 static void strparse(void);
364 static void strreset(void);
365
366 static int tattrset(int);
367 static void tprinter(char *, size_t);
368 static void tdumpsel(void);
369 static void tdumpline(int);
370 static void tdump(void);
371 static void tclearregion(int, int, int, int);
372 static void tcursor(int);
373 static void tdeletechar(int);
374 static void tdeleteline(int);
375 static void tinsertblank(int);
376 static void tinsertblankline(int);
377 static int tlinelen(int);
378 static void tmoveto(int, int);
379 static void tmoveato(int, int);
380 static void tnew(int, int);
381 static void tnewline(int);
382 static void tputtab(int);
383 static void tputc(char *, int);
384 static void treset(void);
385 static void tresize(int, int);
386 static void tscrollup(int, int);
387 static void tscrolldown(int, int);
388 static void tsetattr(int *, int);
389 static void tsetchar(char *, Glyph *, int, int);
390 static void tsetscroll(int, int);
391 static void tswapscreen(void);
392 static void tsetdirt(int, int);
393 static void tsetdirtattr(int);
394 static void tsetmode(bool, bool, int *, int);
395 static void tfulldirt(void);
396 static void techo(char *, int);
397 static void tcontrolcode(uchar );
398 static void tdectest(char );
399 static int32_t tdefcolor(int *, int *, int);
400 static void tdeftran(char);
401 static inline bool match(uint, uint);
402 static void ttynew(void);
403 static void ttyread(void);
404 static void ttyresize(void);
405 static void ttysend(char *, size_t);
406 static void ttywrite(const char *, size_t);
407 static void tstrsequence(uchar c);
408
409 static void xdraws(char *, Glyph, int, int, int, int);
410 static void xhints(void);
411 static void xclear(int, int, int, int);
412 static void xdrawcursor(void);
413 static void xinit(void);
414 static void xloadcols(void);
415 static int xsetcolorname(int, const char *);
416 static int xgeommasktogravity(int);
417 static int xloadfont(Font *, FcPattern *);
418 static void xloadfonts(char *, double);
419 static int xloadfontset(Font *);
420 static void xsettitle(char *);
421 static void xresettitle(void);
422 static void xsetpointermotion(int);
423 static void xseturgency(int);
424 static void xsetsel(char *);
425 static void xtermclear(int, int, int, int);
426 static void xunloadfont(Font *);
427 static void xunloadfonts(void);
428 static void xresize(int, int);
429
430 static void expose(XEvent *);
431 static void visibility(XEvent *);
432 static void unmap(XEvent *);
433 static char *kmap(KeySym, uint);
434 static void kpress(XEvent *);
435 static void cmessage(XEvent *);
436 static void cresize(int, int);
437 static void resize(XEvent *);
438 static void focus(XEvent *);
439 static void brelease(XEvent *);
440 static void bpress(XEvent *);
441 static void bmotion(XEvent *);
442 static void selnotify(XEvent *);
443 static void selclear(XEvent *);
444 static void selrequest(XEvent *);
445
446 static void selinit(void);
447 static void selnormalize(void);
448 static inline bool selected(int, int);
449 static char *getsel(void);
450 static void selcopy(void);
451 static void selscroll(int, int);
452 static void selsnap(int, int *, int *, int);
453 static void getbuttoninfo(XEvent *);
454 static void mousereport(XEvent *);
455
456 static size_t utf8decode(char *, long *, size_t);
457 static long utf8decodebyte(char, size_t *);
458 static size_t utf8encode(long, char *, size_t);
459 static char utf8encodebyte(long, size_t);
460 static size_t utf8len(char *);
461 static size_t utf8validate(long *, size_t);
462
463 static ssize_t xwrite(int, const char *, size_t);
464 static void *xmalloc(size_t);
465 static void *xrealloc(void *, size_t);
466 static char *xstrdup(char *);
467
468 static void usage(void);
469
470 static void (*handler[LASTEvent])(XEvent *) = {
471 [KeyPress] = kpress,
472 [ClientMessage] = cmessage,
473 [ConfigureNotify] = resize,
474 [VisibilityNotify] = visibility,
475 [UnmapNotify] = unmap,
476 [Expose] = expose,
477 [FocusIn] = focus,
478 [FocusOut] = focus,
479 [MotionNotify] = bmotion,
480 [ButtonPress] = bpress,
481 [ButtonRelease] = brelease,
482 [SelectionClear] = selclear,
483 [SelectionNotify] = selnotify,
484 [SelectionRequest] = selrequest,
485 };
486
487 /* Globals */
488 static DC dc;
489 static XWindow xw;
490 static Term term;
491 static CSIEscape csiescseq;
492 static STREscape strescseq;
493 static int cmdfd;
494 static pid_t pid;
495 static Selection sel;
496 static int iofd = STDOUT_FILENO;
497 static char **opt_cmd = NULL;
498 static char *opt_io = NULL;
499 static char *opt_title = NULL;
500 static char *opt_embed = NULL;
501 static char *opt_class = NULL;
502 static char *opt_font = NULL;
503 static int oldbutton = 3; /* button event on startup: 3 = release */
504
505 static char *usedfont = NULL;
506 static double usedfontsize = 0;
507 static double defaultfontsize = 0;
508
509 static uchar utfbyte[UTF_SIZ + 1] = {0x80, 0, 0xC0, 0xE0, 0xF0};
510 static uchar utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
511 static long utfmin[UTF_SIZ + 1] = { 0, 0, 0x80, 0x800, 0x10000};
512 static long utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
513
514 /* Font Ring Cache */
515 enum {
516 FRC_NORMAL,
517 FRC_ITALIC,
518 FRC_BOLD,
519 FRC_ITALICBOLD
520 };
521
522 typedef struct {
523 XftFont *font;
524 int flags;
525 } Fontcache;
526
527 /* Fontcache is an array now. A new font will be appended to the array. */
528 static Fontcache frc[16];
529 static int frclen = 0;
530
531 ssize_t
532 xwrite(int fd, const char *s, size_t len) {
533 size_t aux = len;
534
535 while(len > 0) {
536 ssize_t r = write(fd, s, len);
537 if(r < 0)
538 return r;
539 len -= r;
540 s += r;
541 }
542 return aux;
543 }
544
545 void *
546 xmalloc(size_t len) {
547 void *p = malloc(len);
548
549 if(!p)
550 die("Out of memory\n");
551
552 return p;
553 }
554
555 void *
556 xrealloc(void *p, size_t len) {
557 if((p = realloc(p, len)) == NULL)
558 die("Out of memory\n");
559
560 return p;
561 }
562
563 char *
564 xstrdup(char *s) {
565 if((s = strdup(s)) == NULL)
566 die("Out of memory\n");
567
568 return s;
569 }
570
571 size_t
572 utf8decode(char *c, long *u, size_t clen) {
573 size_t i, j, len, type;
574 long udecoded;
575
576 *u = UTF_INVALID;
577 if(!clen)
578 return 0;
579 udecoded = utf8decodebyte(c[0], &len);
580 if(!BETWEEN(len, 1, UTF_SIZ))
581 return 1;
582 for(i = 1, j = 1; i < clen && j < len; ++i, ++j) {
583 udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
584 if(type != 0)
585 return j;
586 }
587 if(j < len)
588 return 0;
589 *u = udecoded;
590 utf8validate(u, len);
591 return len;
592 }
593
594 long
595 utf8decodebyte(char c, size_t *i) {
596 for(*i = 0; *i < LEN(utfmask); ++(*i))
597 if(((uchar)c & utfmask[*i]) == utfbyte[*i])
598 return (uchar)c & ~utfmask[*i];
599 return 0;
600 }
601
602 size_t
603 utf8encode(long u, char *c, size_t clen) {
604 size_t len, i;
605
606 len = utf8validate(&u, 0);
607 if(clen < len)
608 return 0;
609 for(i = len - 1; i != 0; --i) {
610 c[i] = utf8encodebyte(u, 0);
611 u >>= 6;
612 }
613 c[0] = utf8encodebyte(u, len);
614 return len;
615 }
616
617 char
618 utf8encodebyte(long u, size_t i) {
619 return utfbyte[i] | (u & ~utfmask[i]);
620 }
621
622 size_t
623 utf8len(char *c) {
624 return utf8decode(c, &(long){0}, UTF_SIZ);
625 }
626
627 size_t
628 utf8validate(long *u, size_t i) {
629 if(!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF))
630 *u = UTF_INVALID;
631 for(i = 1; *u > utfmax[i]; ++i)
632 ;
633 return i;
634 }
635
636 static void
637 selinit(void) {
638 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
639 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
640 sel.mode = 0;
641 sel.ob.x = -1;
642 sel.clip = NULL;
643 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
644 if(sel.xtarget == None)
645 sel.xtarget = XA_STRING;
646 }
647
648 static int
649 x2col(int x) {
650 x -= borderpx;
651 x /= xw.cw;
652
653 return LIMIT(x, 0, term.col-1);
654 }
655
656 static int
657 y2row(int y) {
658 y -= borderpx;
659 y /= xw.ch;
660
661 return LIMIT(y, 0, term.row-1);
662 }
663
664 static int tlinelen(int y) {
665 int i = term.col;
666
667 if(term.line[y][i - 1].mode & ATTR_WRAP)
668 return i;
669
670 while(i > 0 && term.line[y][i - 1].c[0] == ' ')
671 --i;
672
673 return i;
674 }
675
676 static void
677 selnormalize(void) {
678 int i;
679
680 if(sel.ob.y == sel.oe.y || sel.type == SEL_RECTANGULAR) {
681 sel.nb.x = MIN(sel.ob.x, sel.oe.x);
682 sel.ne.x = MAX(sel.ob.x, sel.oe.x);
683 } else {
684 sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
685 sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
686 }
687 sel.nb.y = MIN(sel.ob.y, sel.oe.y);
688 sel.ne.y = MAX(sel.ob.y, sel.oe.y);
689
690 selsnap(sel.snap, &sel.nb.x, &sel.nb.y, -1);
691 selsnap(sel.snap, &sel.ne.x, &sel.ne.y, +1);
692
693 /* expand selection over line breaks */
694 if (sel.type == SEL_RECTANGULAR)
695 return;
696 i = tlinelen(sel.nb.y);
697 if (i < sel.nb.x)
698 sel.nb.x = i;
699 if (tlinelen(sel.ne.y) <= sel.ne.x)
700 sel.ne.x = term.col - 1;
701 }
702
703 static inline bool
704 selected(int x, int y) {
705 if(sel.type == SEL_RECTANGULAR)
706 return BETWEEN(y, sel.nb.y, sel.ne.y)
707 && BETWEEN(x, sel.nb.x, sel.ne.x);
708
709 return BETWEEN(y, sel.nb.y, sel.ne.y)
710 && (y != sel.nb.y || x >= sel.nb.x)
711 && (y != sel.ne.y || x <= sel.ne.x);
712 }
713
714 void
715 selsnap(int mode, int *x, int *y, int direction) {
716 int newx, newy, xt, yt;
717 bool delim, prevdelim;
718 Glyph *gp, *prevgp;
719
720 switch(mode) {
721 case SNAP_WORD:
722 /*
723 * Snap around if the word wraps around at the end or
724 * beginning of a line.
725 */
726 prevgp = &term.line[*y][*x];
727 prevdelim = strchr(worddelimiters, prevgp->c[0]) != NULL;
728 for(;;) {
729 newx = *x + direction;
730 newy = *y;
731 if(!BETWEEN(newx, 0, term.col - 1)) {
732 newy += direction;
733 newx = (newx + term.col) % term.col;
734 if (!BETWEEN(newy, 0, term.row - 1))
735 break;
736
737 if(direction > 0)
738 yt = *y, xt = *x;
739 else
740 yt = newy, xt = newx;
741 if(!(term.line[yt][xt].mode & ATTR_WRAP))
742 break;
743 }
744
745 if (newx >= tlinelen(newy))
746 break;
747
748 gp = &term.line[newy][newx];
749 delim = strchr(worddelimiters, gp->c[0]) != NULL;
750 if(!(gp->mode & ATTR_WDUMMY) && (delim != prevdelim
751 || (delim && gp->c[0] != prevgp->c[0])))
752 break;
753
754 *x = newx;
755 *y = newy;
756 prevgp = gp;
757 prevdelim = delim;
758 }
759 break;
760 case SNAP_LINE:
761 /*
762 * Snap around if the the previous line or the current one
763 * has set ATTR_WRAP at its end. Then the whole next or
764 * previous line will be selected.
765 */
766 *x = (direction < 0) ? 0 : term.col - 1;
767 if(direction < 0 && *y > 0) {
768 for(; *y > 0; *y += direction) {
769 if(!(term.line[*y-1][term.col-1].mode
770 & ATTR_WRAP)) {
771 break;
772 }
773 }
774 } else if(direction > 0 && *y < term.row-1) {
775 for(; *y < term.row; *y += direction) {
776 if(!(term.line[*y][term.col-1].mode
777 & ATTR_WRAP)) {
778 break;
779 }
780 }
781 }
782 break;
783 }
784 }
785
786 void
787 getbuttoninfo(XEvent *e) {
788 int type;
789 uint state = e->xbutton.state & ~(Button1Mask | forceselmod);
790
791 sel.alt = IS_SET(MODE_ALTSCREEN);
792
793 sel.oe.x = x2col(e->xbutton.x);
794 sel.oe.y = y2row(e->xbutton.y);
795 selnormalize();
796
797 sel.type = SEL_REGULAR;
798 for(type = 1; type < LEN(selmasks); ++type) {
799 if(match(selmasks[type], state)) {
800 sel.type = type;
801 break;
802 }
803 }
804 }
805
806 void
807 mousereport(XEvent *e) {
808 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
809 button = e->xbutton.button, state = e->xbutton.state,
810 len;
811 char buf[40];
812 static int ox, oy;
813
814 /* from urxvt */
815 if(e->xbutton.type == MotionNotify) {
816 if(x == ox && y == oy)
817 return;
818 if(!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
819 return;
820 /* MOUSE_MOTION: no reporting if no button is pressed */
821 if(IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
822 return;
823
824 button = oldbutton + 32;
825 ox = x;
826 oy = y;
827 } else {
828 if(!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
829 button = 3;
830 } else {
831 button -= Button1;
832 if(button >= 3)
833 button += 64 - 3;
834 }
835 if(e->xbutton.type == ButtonPress) {
836 oldbutton = button;
837 ox = x;
838 oy = y;
839 } else if(e->xbutton.type == ButtonRelease) {
840 oldbutton = 3;
841 /* MODE_MOUSEX10: no button release reporting */
842 if(IS_SET(MODE_MOUSEX10))
843 return;
844 if (button == 64 || button == 65)
845 return;
846 }
847 }
848
849 if(!IS_SET(MODE_MOUSEX10)) {
850 button += (state & ShiftMask ? 4 : 0)
851 + (state & Mod4Mask ? 8 : 0)
852 + (state & ControlMask ? 16 : 0);
853 }
854
855 len = 0;
856 if(IS_SET(MODE_MOUSESGR)) {
857 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
858 button, x+1, y+1,
859 e->xbutton.type == ButtonRelease ? 'm' : 'M');
860 } else if(x < 223 && y < 223) {
861 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
862 32+button, 32+x+1, 32+y+1);
863 } else {
864 return;
865 }
866
867 ttywrite(buf, len);
868 }
869
870 void
871 bpress(XEvent *e) {
872 struct timespec now;
873 Mousekey *mk;
874
875 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
876 mousereport(e);
877 return;
878 }
879
880 for(mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
881 if(e->xbutton.button == mk->b
882 && match(mk->mask, e->xbutton.state)) {
883 ttysend(mk->s, strlen(mk->s));
884 return;
885 }
886 }
887
888 if(e->xbutton.button == Button1) {
889 clock_gettime(CLOCK_MONOTONIC, &now);
890
891 /* Clear previous selection, logically and visually. */
892 selclear(NULL);
893 sel.mode = 1;
894 sel.type = SEL_REGULAR;
895 sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
896 sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
897
898 /*
899 * If the user clicks below predefined timeouts specific
900 * snapping behaviour is exposed.
901 */
902 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
903 sel.snap = SNAP_LINE;
904 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
905 sel.snap = SNAP_WORD;
906 } else {
907 sel.snap = 0;
908 }
909 selnormalize();
910
911 /*
912 * Draw selection, unless it's regular and we don't want to
913 * make clicks visible
914 */
915 if(sel.snap != 0) {
916 sel.mode++;
917 tsetdirt(sel.nb.y, sel.ne.y);
918 }
919 sel.tclick2 = sel.tclick1;
920 sel.tclick1 = now;
921 }
922 }
923
924 char *
925 getsel(void) {
926 char *str, *ptr;
927 int y, bufsize, size, lastx, linelen;
928 Glyph *gp, *last;
929
930 if(sel.ob.x == -1)
931 return NULL;
932
933 bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
934 ptr = str = xmalloc(bufsize);
935
936 /* append every set & selected glyph to the selection */
937 for(y = sel.nb.y; y < sel.ne.y + 1; y++) {
938 linelen = tlinelen(y);
939
940 if(sel.type == SEL_RECTANGULAR) {
941 gp = &term.line[y][sel.nb.x];
942 lastx = sel.ne.x;
943 } else {
944 gp = &term.line[y][sel.nb.y == y ? sel.nb.x : 0];
945 lastx = (sel.ne.y == y) ? sel.ne.x : term.col-1;
946 }
947 last = &term.line[y][MIN(lastx, linelen-1)];
948 while(last >= gp && last->c[0] == ' ')
949 --last;
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();
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();
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 gp = &term.line[term.c.y][term.c.x];
2675 }
2676
2677 if(IS_SET(MODE_INSERT) && term.c.x+width < term.col)
2678 memmove(gp+width, gp, (term.col - term.c.x - width) * sizeof(Glyph));
2679
2680 if(term.c.x+width > term.col) {
2681 tnewline(1);
2682 gp = &term.line[term.c.y][term.c.x];
2683 }
2684
2685 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2686
2687 if(width == 2) {
2688 gp->mode |= ATTR_WIDE;
2689 if(term.c.x+1 < term.col) {
2690 gp[1].c[0] = '\0';
2691 gp[1].mode = ATTR_WDUMMY;
2692 }
2693 }
2694 if(term.c.x+width < term.col) {
2695 tmoveto(term.c.x+width, term.c.y);
2696 } else {
2697 term.c.state |= CURSOR_WRAPNEXT;
2698 }
2699 }
2700
2701 void
2702 tresize(int col, int row) {
2703 int i;
2704 int minrow = MIN(row, term.row);
2705 int mincol = MIN(col, term.col);
2706 int slide = term.c.y - row + 1;
2707 bool *bp;
2708 TCursor c;
2709
2710 if(col < 1 || row < 1) {
2711 fprintf(stderr,
2712 "tresize: error resizing to %dx%d\n", col, row);
2713 return;
2714 }
2715
2716 /* free unneeded rows */
2717 i = 0;
2718 if(slide > 0) {
2719 /*
2720 * slide screen to keep cursor where we expect it -
2721 * tscrollup would work here, but we can optimize to
2722 * memmove because we're freeing the earlier lines
2723 */
2724 for(/* i = 0 */; i < slide; i++) {
2725 free(term.line[i]);
2726 free(term.alt[i]);
2727 }
2728 memmove(term.line, term.line + slide, row * sizeof(Line));
2729 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2730 }
2731 for(i += row; i < term.row; i++) {
2732 free(term.line[i]);
2733 free(term.alt[i]);
2734 }
2735
2736 /* resize to new height */
2737 term.line = xrealloc(term.line, row * sizeof(Line));
2738 term.alt = xrealloc(term.alt, row * sizeof(Line));
2739 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2740 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2741
2742 /* resize each row to new width, zero-pad if needed */
2743 for(i = 0; i < minrow; i++) {
2744 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2745 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2746 }
2747
2748 /* allocate any new rows */
2749 for(/* i == minrow */; i < row; i++) {
2750 term.line[i] = xmalloc(col * sizeof(Glyph));
2751 term.alt[i] = xmalloc(col * sizeof(Glyph));
2752 }
2753 if(col > term.col) {
2754 bp = term.tabs + term.col;
2755
2756 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2757 while(--bp > term.tabs && !*bp)
2758 /* nothing */ ;
2759 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2760 *bp = 1;
2761 }
2762 /* update terminal size */
2763 term.col = col;
2764 term.row = row;
2765 /* reset scrolling region */
2766 tsetscroll(0, row-1);
2767 /* make use of the LIMIT in tmoveto */
2768 tmoveto(term.c.x, term.c.y);
2769 /* Clearing both screens (it makes dirty all lines) */
2770 c = term.c;
2771 for(i = 0; i < 2; i++) {
2772 if(mincol < col && 0 < minrow) {
2773 tclearregion(mincol, 0, col - 1, minrow - 1);
2774 }
2775 if(0 < col && minrow < row) {
2776 tclearregion(0, minrow, col - 1, row - 1);
2777 }
2778 tswapscreen();
2779 tcursor(CURSOR_LOAD);
2780 }
2781 term.c = c;
2782 }
2783
2784 void
2785 xresize(int col, int row) {
2786 xw.tw = MAX(1, col * xw.cw);
2787 xw.th = MAX(1, row * xw.ch);
2788
2789 XFreePixmap(xw.dpy, xw.buf);
2790 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2791 DefaultDepth(xw.dpy, xw.scr));
2792 XftDrawChange(xw.draw, xw.buf);
2793 xclear(0, 0, xw.w, xw.h);
2794 }
2795
2796 static inline ushort
2797 sixd_to_16bit(int x) {
2798 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2799 }
2800
2801 void
2802 xloadcols(void) {
2803 int i;
2804 XRenderColor color = { .alpha = 0xffff };
2805 static bool loaded;
2806 Color *cp;
2807
2808 if(loaded) {
2809 for (cp = dc.col; cp < dc.col + LEN(dc.col); ++cp)
2810 XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
2811 }
2812
2813 /* load colors [0-15] and [256-LEN(colorname)] (config.h) */
2814 for(i = 0; i < LEN(colorname); i++) {
2815 if(!colorname[i])
2816 continue;
2817 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2818 die("Could not allocate color '%s'\n", colorname[i]);
2819 }
2820 }
2821
2822 /* load colors [16-231] ; same colors as xterm */
2823 for(i = 16; i < 6*6*6+16; i++) {
2824 color.red = sixd_to_16bit( ((i-16)/36)%6 );
2825 color.green = sixd_to_16bit( ((i-16)/6) %6 );
2826 color.blue = sixd_to_16bit( ((i-16)/1) %6 );
2827 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i]))
2828 die("Could not allocate color %d\n", i);
2829 }
2830
2831 /* load colors [232-255] ; grayscale */
2832 for(; i < 256; i++) {
2833 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (i-(6*6*6+16));
2834 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i]))
2835 die("Could not allocate color %d\n", i);
2836 }
2837 loaded = true;
2838 }
2839
2840 int
2841 xsetcolorname(int x, const char *name) {
2842 XRenderColor color = { .alpha = 0xffff };
2843 Color ncolor;
2844
2845 if(!BETWEEN(x, 0, LEN(colorname)))
2846 return 1;
2847
2848 if(!name) {
2849 if(BETWEEN(x, 16, 16 + 215)) { /* 256 color */
2850 color.red = sixd_to_16bit( ((x-16)/36)%6 );
2851 color.green = sixd_to_16bit( ((x-16)/6) %6 );
2852 color.blue = sixd_to_16bit( ((x-16)/1) %6 );
2853 if(!XftColorAllocValue(xw.dpy, xw.vis,
2854 xw.cmap, &color, &ncolor)) {
2855 return 1;
2856 }
2857
2858 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2859 dc.col[x] = ncolor;
2860 return 0;
2861 } else if(BETWEEN(x, 16 + 216, 255)) { /* greyscale */
2862 color.red = color.green = color.blue = \
2863 0x0808 + 0x0a0a * (x - (16 + 216));
2864 if(!XftColorAllocValue(xw.dpy, xw.vis,
2865 xw.cmap, &color, &ncolor)) {
2866 return 1;
2867 }
2868
2869 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2870 dc.col[x] = ncolor;
2871 return 0;
2872 } else { /* system colors */
2873 name = colorname[x];
2874 }
2875 }
2876 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &ncolor))
2877 return 1;
2878
2879 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2880 dc.col[x] = ncolor;
2881 return 0;
2882 }
2883
2884 void
2885 xtermclear(int col1, int row1, int col2, int row2) {
2886 XftDrawRect(xw.draw,
2887 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2888 borderpx + col1 * xw.cw,
2889 borderpx + row1 * xw.ch,
2890 (col2-col1+1) * xw.cw,
2891 (row2-row1+1) * xw.ch);
2892 }
2893
2894 /*
2895 * Absolute coordinates.
2896 */
2897 void
2898 xclear(int x1, int y1, int x2, int y2) {
2899 XftDrawRect(xw.draw,
2900 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2901 x1, y1, x2-x1, y2-y1);
2902 }
2903
2904 void
2905 xhints(void) {
2906 XClassHint class = {opt_class ? opt_class : termname, termname};
2907 XWMHints wm = {.flags = InputHint, .input = 1};
2908 XSizeHints *sizeh = NULL;
2909
2910 sizeh = XAllocSizeHints();
2911
2912 sizeh->flags = PSize | PResizeInc | PBaseSize;
2913 sizeh->height = xw.h;
2914 sizeh->width = xw.w;
2915 sizeh->height_inc = xw.ch;
2916 sizeh->width_inc = xw.cw;
2917 sizeh->base_height = 2 * borderpx;
2918 sizeh->base_width = 2 * borderpx;
2919 if(xw.isfixed == True) {
2920 sizeh->flags |= PMaxSize | PMinSize;
2921 sizeh->min_width = sizeh->max_width = xw.w;
2922 sizeh->min_height = sizeh->max_height = xw.h;
2923 }
2924 if(xw.gm & (XValue|YValue)) {
2925 sizeh->flags |= USPosition | PWinGravity;
2926 sizeh->x = xw.l;
2927 sizeh->y = xw.t;
2928 sizeh->win_gravity = xgeommasktogravity(xw.gm);
2929 }
2930
2931 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
2932 &class);
2933 XFree(sizeh);
2934 }
2935
2936 int
2937 xgeommasktogravity(int mask) {
2938 switch(mask & (XNegative|YNegative)) {
2939 case 0:
2940 return NorthWestGravity;
2941 case XNegative:
2942 return NorthEastGravity;
2943 case YNegative:
2944 return SouthWestGravity;
2945 }
2946 return SouthEastGravity;
2947 }
2948
2949 int
2950 xloadfont(Font *f, FcPattern *pattern) {
2951 FcPattern *match;
2952 FcResult result;
2953
2954 match = FcFontMatch(NULL, pattern, &result);
2955 if(!match)
2956 return 1;
2957
2958 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2959 FcPatternDestroy(match);
2960 return 1;
2961 }
2962
2963 f->set = NULL;
2964 f->pattern = FcPatternDuplicate(pattern);
2965
2966 f->ascent = f->match->ascent;
2967 f->descent = f->match->descent;
2968 f->lbearing = 0;
2969 f->rbearing = f->match->max_advance_width;
2970
2971 f->height = f->ascent + f->descent;
2972 f->width = f->lbearing + f->rbearing;
2973
2974 return 0;
2975 }
2976
2977 void
2978 xloadfonts(char *fontstr, double fontsize) {
2979 FcPattern *pattern;
2980 FcResult r_sz, r_psz;
2981 double fontval;
2982 float ceilf(float);
2983
2984 if(fontstr[0] == '-') {
2985 pattern = XftXlfdParse(fontstr, False, False);
2986 } else {
2987 pattern = FcNameParse((FcChar8 *)fontstr);
2988 }
2989
2990 if(!pattern)
2991 die("st: can't open font %s\n", fontstr);
2992
2993 if(fontsize > 1) {
2994 FcPatternDel(pattern, FC_PIXEL_SIZE);
2995 FcPatternDel(pattern, FC_SIZE);
2996 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2997 usedfontsize = fontsize;
2998 } else {
2999 r_psz = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
3000 r_sz = FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval);
3001 if(r_psz == FcResultMatch) {
3002 usedfontsize = fontval;
3003 } else if(r_sz == FcResultMatch) {
3004 usedfontsize = -1;
3005 } else {
3006 /*
3007 * Default font size is 12, if none given. This is to
3008 * have a known usedfontsize value.
3009 */
3010 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
3011 usedfontsize = 12;
3012 }
3013 defaultfontsize = usedfontsize;
3014 }
3015
3016 FcConfigSubstitute(0, pattern, FcMatchPattern);
3017 FcDefaultSubstitute(pattern);
3018
3019 if(xloadfont(&dc.font, pattern))
3020 die("st: can't open font %s\n", fontstr);
3021
3022 if(usedfontsize < 0) {
3023 FcPatternGetDouble(dc.font.match->pattern,
3024 FC_PIXEL_SIZE, 0, &fontval);
3025 usedfontsize = fontval;
3026 if(fontsize == 0)
3027 defaultfontsize = fontval;
3028 }
3029
3030 /* Setting character width and height. */
3031 xw.cw = ceilf(dc.font.width * cwscale);
3032 xw.ch = ceilf(dc.font.height * chscale);
3033
3034 FcPatternDel(pattern, FC_SLANT);
3035 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
3036 if(xloadfont(&dc.ifont, pattern))
3037 die("st: can't open font %s\n", fontstr);
3038
3039 FcPatternDel(pattern, FC_WEIGHT);
3040 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
3041 if(xloadfont(&dc.ibfont, pattern))
3042 die("st: can't open font %s\n", fontstr);
3043
3044 FcPatternDel(pattern, FC_SLANT);
3045 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
3046 if(xloadfont(&dc.bfont, pattern))
3047 die("st: can't open font %s\n", fontstr);
3048
3049 FcPatternDestroy(pattern);
3050 }
3051
3052 int
3053 xloadfontset(Font *f) {
3054 FcResult result;
3055
3056 if(!(f->set = FcFontSort(0, f->pattern, FcTrue, 0, &result)))
3057 return 1;
3058 return 0;
3059 }
3060
3061 void
3062 xunloadfont(Font *f) {
3063 XftFontClose(xw.dpy, f->match);
3064 FcPatternDestroy(f->pattern);
3065 if(f->set)
3066 FcFontSetDestroy(f->set);
3067 }
3068
3069 void
3070 xunloadfonts(void) {
3071 /* Free the loaded fonts in the font cache. */
3072 while(frclen > 0)
3073 XftFontClose(xw.dpy, frc[--frclen].font);
3074
3075 xunloadfont(&dc.font);
3076 xunloadfont(&dc.bfont);
3077 xunloadfont(&dc.ifont);
3078 xunloadfont(&dc.ibfont);
3079 }
3080
3081 void
3082 xzoom(const Arg *arg) {
3083 Arg larg;
3084
3085 larg.i = usedfontsize + arg->i;
3086 xzoomabs(&larg);
3087 }
3088
3089 void
3090 xzoomabs(const Arg *arg) {
3091 xunloadfonts();
3092 xloadfonts(usedfont, arg->i);
3093 cresize(0, 0);
3094 redraw();
3095 xhints();
3096 }
3097
3098 void
3099 xzoomreset(const Arg *arg) {
3100 Arg larg;
3101
3102 if(defaultfontsize > 0) {
3103 larg.i = defaultfontsize;
3104 xzoomabs(&larg);
3105 }
3106 }
3107
3108 void
3109 xinit(void) {
3110 XGCValues gcvalues;
3111 Cursor cursor;
3112 Window parent;
3113 pid_t thispid = getpid();
3114
3115 if(!(xw.dpy = XOpenDisplay(NULL)))
3116 die("Can't open display\n");
3117 xw.scr = XDefaultScreen(xw.dpy);
3118 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
3119
3120 /* font */
3121 if(!FcInit())
3122 die("Could not init fontconfig.\n");
3123
3124 usedfont = (opt_font == NULL)? font : opt_font;
3125 xloadfonts(usedfont, 0);
3126
3127 /* colors */
3128 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
3129 xloadcols();
3130
3131 /* adjust fixed window geometry */
3132 xw.w = 2 * borderpx + term.col * xw.cw;
3133 xw.h = 2 * borderpx + term.row * xw.ch;
3134 if(xw.gm & XNegative)
3135 xw.l += DisplayWidth(xw.dpy, xw.scr) - xw.w - 2;
3136 if(xw.gm & YNegative)
3137 xw.t += DisplayWidth(xw.dpy, xw.scr) - xw.h - 2;
3138
3139 /* Events */
3140 xw.attrs.background_pixel = dc.col[defaultbg].pixel;
3141 xw.attrs.border_pixel = dc.col[defaultbg].pixel;
3142 xw.attrs.bit_gravity = NorthWestGravity;
3143 xw.attrs.event_mask = FocusChangeMask | KeyPressMask
3144 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
3145 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
3146 xw.attrs.colormap = xw.cmap;
3147
3148 if (!(opt_embed && (parent = strtol(opt_embed, NULL, 0))))
3149 parent = XRootWindow(xw.dpy, xw.scr);
3150 xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
3151 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
3152 xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
3153 | CWEventMask | CWColormap, &xw.attrs);
3154
3155 memset(&gcvalues, 0, sizeof(gcvalues));
3156 gcvalues.graphics_exposures = False;
3157 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
3158 &gcvalues);
3159 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
3160 DefaultDepth(xw.dpy, xw.scr));
3161 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
3162 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
3163
3164 /* Xft rendering context */
3165 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
3166
3167 /* input methods */
3168 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3169 XSetLocaleModifiers("@im=local");
3170 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3171 XSetLocaleModifiers("@im=");
3172 if((xw.xim = XOpenIM(xw.dpy,
3173 NULL, NULL, NULL)) == NULL) {
3174 die("XOpenIM failed. Could not open input"
3175 " device.\n");
3176 }
3177 }
3178 }
3179 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
3180 | XIMStatusNothing, XNClientWindow, xw.win,
3181 XNFocusWindow, xw.win, NULL);
3182 if(xw.xic == NULL)
3183 die("XCreateIC failed. Could not obtain input method.\n");
3184
3185 /* white cursor, black outline */
3186 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
3187 XDefineCursor(xw.dpy, xw.win, cursor);
3188 XRecolorCursor(xw.dpy, cursor,
3189 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
3190 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
3191
3192 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
3193 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
3194 xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
3195 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
3196
3197 xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
3198 XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
3199 PropModeReplace, (uchar *)&thispid, 1);
3200
3201 xresettitle();
3202 XMapWindow(xw.dpy, xw.win);
3203 xhints();
3204 XSync(xw.dpy, False);
3205 }
3206
3207 void
3208 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
3209 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
3210 width = charlen * xw.cw, xp, i;
3211 int frcflags;
3212 int u8fl, u8fblen, u8cblen, doesexist;
3213 char *u8c, *u8fs;
3214 long unicodep;
3215 Font *font = &dc.font;
3216 FcResult fcres;
3217 FcPattern *fcpattern, *fontpattern;
3218 FcFontSet *fcsets[] = { NULL };
3219 FcCharSet *fccharset;
3220 Color *fg, *bg, *temp, revfg, revbg, truefg, truebg;
3221 XRenderColor colfg, colbg;
3222 XRectangle r;
3223 int oneatatime;
3224
3225 frcflags = FRC_NORMAL;
3226
3227 if(base.mode & ATTR_ITALIC) {
3228 if(base.fg == defaultfg)
3229 base.fg = defaultitalic;
3230 font = &dc.ifont;
3231 frcflags = FRC_ITALIC;
3232 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
3233 if(base.fg == defaultfg)
3234 base.fg = defaultitalic;
3235 font = &dc.ibfont;
3236 frcflags = FRC_ITALICBOLD;
3237 } else if(base.mode & ATTR_UNDERLINE) {
3238 if(base.fg == defaultfg)
3239 base.fg = defaultunderline;
3240 }
3241
3242 if(IS_TRUECOL(base.fg)) {
3243 colfg.alpha = 0xffff;
3244 colfg.red = TRUERED(base.fg);
3245 colfg.green = TRUEGREEN(base.fg);
3246 colfg.blue = TRUEBLUE(base.fg);
3247 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
3248 fg = &truefg;
3249 } else {
3250 fg = &dc.col[base.fg];
3251 }
3252
3253 if(IS_TRUECOL(base.bg)) {
3254 colbg.alpha = 0xffff;
3255 colbg.green = TRUEGREEN(base.bg);
3256 colbg.red = TRUERED(base.bg);
3257 colbg.blue = TRUEBLUE(base.bg);
3258 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
3259 bg = &truebg;
3260 } else {
3261 bg = &dc.col[base.bg];
3262 }
3263
3264 if(base.mode & ATTR_BOLD) {
3265 /*
3266 * change basic system colors [0-7]
3267 * to bright system colors [8-15]
3268 */
3269 if(BETWEEN(base.fg, 0, 7) && !(base.mode & ATTR_FAINT))
3270 fg = &dc.col[base.fg + 8];
3271
3272 if(base.mode & ATTR_ITALIC) {
3273 font = &dc.ibfont;
3274 frcflags = FRC_ITALICBOLD;
3275 } else {
3276 font = &dc.bfont;
3277 frcflags = FRC_BOLD;
3278 }
3279 }
3280
3281 if(IS_SET(MODE_REVERSE)) {
3282 if(fg == &dc.col[defaultfg]) {
3283 fg = &dc.col[defaultbg];
3284 } else {
3285 colfg.red = ~fg->color.red;
3286 colfg.green = ~fg->color.green;
3287 colfg.blue = ~fg->color.blue;
3288 colfg.alpha = fg->color.alpha;
3289 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
3290 &revfg);
3291 fg = &revfg;
3292 }
3293
3294 if(bg == &dc.col[defaultbg]) {
3295 bg = &dc.col[defaultfg];
3296 } else {
3297 colbg.red = ~bg->color.red;
3298 colbg.green = ~bg->color.green;
3299 colbg.blue = ~bg->color.blue;
3300 colbg.alpha = bg->color.alpha;
3301 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
3302 &revbg);
3303 bg = &revbg;
3304 }
3305 }
3306
3307 if(base.mode & ATTR_REVERSE) {
3308 temp = fg;
3309 fg = bg;
3310 bg = temp;
3311 }
3312
3313 if(base.mode & ATTR_FAINT && !(base.mode & ATTR_BOLD)) {
3314 colfg.red = fg->color.red / 2;
3315 colfg.green = fg->color.green / 2;
3316 colfg.blue = fg->color.blue / 2;
3317 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
3318 fg = &revfg;
3319 }
3320
3321 if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
3322 fg = bg;
3323
3324 if(base.mode & ATTR_INVISIBLE)
3325 fg = bg;
3326
3327 /* Intelligent cleaning up of the borders. */
3328 if(x == 0) {
3329 xclear(0, (y == 0)? 0 : winy, borderpx,
3330 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
3331 }
3332 if(x + charlen >= term.col) {
3333 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
3334 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
3335 }
3336 if(y == 0)
3337 xclear(winx, 0, winx + width, borderpx);
3338 if(y == term.row-1)
3339 xclear(winx, winy + xw.ch, winx + width, xw.h);
3340
3341 /* Clean up the region we want to draw to. */
3342 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
3343
3344 /* Set the clip region because Xft is sometimes dirty. */
3345 r.x = 0;
3346 r.y = 0;
3347 r.height = xw.ch;
3348 r.width = width;
3349 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
3350
3351 for(xp = winx; bytelen > 0;) {
3352 /*
3353 * Search for the range in the to be printed string of glyphs
3354 * that are in the main font. Then print that range. If
3355 * some glyph is found that is not in the font, do the
3356 * fallback dance.
3357 */
3358 u8fs = s;
3359 u8fblen = 0;
3360 u8fl = 0;
3361 oneatatime = font->width != xw.cw;
3362 for(;;) {
3363 u8c = s;
3364 u8cblen = utf8decode(s, &unicodep, UTF_SIZ);
3365 s += u8cblen;
3366 bytelen -= u8cblen;
3367
3368 doesexist = XftCharExists(xw.dpy, font->match, unicodep);
3369 if(doesexist) {
3370 u8fl++;
3371 u8fblen += u8cblen;
3372 if(!oneatatime && bytelen > 0)
3373 continue;
3374 }
3375
3376 if(u8fl > 0) {
3377 XftDrawStringUtf8(xw.draw, fg,
3378 font->match, xp,
3379 winy + font->ascent,
3380 (FcChar8 *)u8fs,
3381 u8fblen);
3382 xp += xw.cw * u8fl;
3383 }
3384 break;
3385 }
3386 if(doesexist) {
3387 if(oneatatime)
3388 continue;
3389 break;
3390 }
3391
3392 /* Search the font cache. */
3393 for(i = 0; i < frclen; i++) {
3394 if(XftCharExists(xw.dpy, frc[i].font, unicodep)
3395 && frc[i].flags == frcflags) {
3396 break;
3397 }
3398 }
3399
3400 /* Nothing was found. */
3401 if(i >= frclen) {
3402 if(!font->set)
3403 xloadfontset(font);
3404 fcsets[0] = font->set;
3405
3406 /*
3407 * Nothing was found in the cache. Now use
3408 * some dozen of Fontconfig calls to get the
3409 * font for one single character.
3410 *
3411 * Xft and fontconfig are design failures.
3412 */
3413 fcpattern = FcPatternDuplicate(font->pattern);
3414 fccharset = FcCharSetCreate();
3415
3416 FcCharSetAddChar(fccharset, unicodep);
3417 FcPatternAddCharSet(fcpattern, FC_CHARSET,
3418 fccharset);
3419 FcPatternAddBool(fcpattern, FC_SCALABLE,
3420 FcTrue);
3421
3422 FcConfigSubstitute(0, fcpattern,
3423 FcMatchPattern);
3424 FcDefaultSubstitute(fcpattern);
3425
3426 fontpattern = FcFontSetMatch(0, fcsets,
3427 FcTrue, fcpattern, &fcres);
3428
3429 /*
3430 * Overwrite or create the new cache entry.
3431 */
3432 if(frclen >= LEN(frc)) {
3433 frclen = LEN(frc) - 1;
3434 XftFontClose(xw.dpy, frc[frclen].font);
3435 }
3436
3437 frc[frclen].font = XftFontOpenPattern(xw.dpy,
3438 fontpattern);
3439 frc[frclen].flags = frcflags;
3440
3441 i = frclen;
3442 frclen++;
3443
3444 FcPatternDestroy(fcpattern);
3445 FcCharSetDestroy(fccharset);
3446 }
3447
3448 XftDrawStringUtf8(xw.draw, fg, frc[i].font,
3449 xp, winy + frc[i].font->ascent,
3450 (FcChar8 *)u8c, u8cblen);
3451
3452 xp += xw.cw * wcwidth(unicodep);
3453 }
3454
3455 /*
3456 * This is how the loop above actually should be. Why does the
3457 * application have to care about font details?
3458 *
3459 * I have to repeat: Xft and Fontconfig are design failures.
3460 */
3461 /*
3462 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
3463 winy + font->ascent, (FcChar8 *)s, bytelen);
3464 */
3465
3466 if(base.mode & ATTR_UNDERLINE) {
3467 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
3468 width, 1);
3469 }
3470
3471 if(base.mode & ATTR_STRUCK) {
3472 XftDrawRect(xw.draw, fg, winx, winy + 2 * font->ascent / 3,
3473 width, 1);
3474 }
3475
3476 /* Reset clip to none. */
3477 XftDrawSetClip(xw.draw, 0);
3478 }
3479
3480 void
3481 xdrawcursor(void) {
3482 static int oldx = 0, oldy = 0;
3483 int sl, width, curx;
3484 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
3485
3486 LIMIT(oldx, 0, term.col-1);
3487 LIMIT(oldy, 0, term.row-1);
3488
3489 curx = term.c.x;
3490
3491 /* adjust position if in dummy */
3492 if(term.line[oldy][oldx].mode & ATTR_WDUMMY)
3493 oldx--;
3494 if(term.line[term.c.y][curx].mode & ATTR_WDUMMY)
3495 curx--;
3496
3497 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
3498
3499 /* remove the old cursor */
3500 sl = utf8len(term.line[oldy][oldx].c);
3501 width = (term.line[oldy][oldx].mode & ATTR_WIDE)? 2 : 1;
3502 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
3503 oldy, width, sl);
3504
3505 if(IS_SET(MODE_HIDE))
3506 return;
3507
3508 /* draw the new one */
3509 if(xw.state & WIN_FOCUSED) {
3510 if(IS_SET(MODE_REVERSE)) {
3511 g.mode |= ATTR_REVERSE;
3512 g.fg = defaultcs;
3513 g.bg = defaultfg;
3514 }
3515
3516 sl = utf8len(g.c);
3517 width = (term.line[term.c.y][curx].mode & ATTR_WIDE)\
3518 ? 2 : 1;
3519 xdraws(g.c, g, term.c.x, term.c.y, width, sl);
3520 } else {
3521 XftDrawRect(xw.draw, &dc.col[defaultcs],
3522 borderpx + curx * xw.cw,
3523 borderpx + term.c.y * xw.ch,
3524 xw.cw - 1, 1);
3525 XftDrawRect(xw.draw, &dc.col[defaultcs],
3526 borderpx + curx * xw.cw,
3527 borderpx + term.c.y * xw.ch,
3528 1, xw.ch - 1);
3529 XftDrawRect(xw.draw, &dc.col[defaultcs],
3530 borderpx + (curx + 1) * xw.cw - 1,
3531 borderpx + term.c.y * xw.ch,
3532 1, xw.ch - 1);
3533 XftDrawRect(xw.draw, &dc.col[defaultcs],
3534 borderpx + curx * xw.cw,
3535 borderpx + (term.c.y + 1) * xw.ch - 1,
3536 xw.cw, 1);
3537 }
3538 oldx = curx, oldy = term.c.y;
3539 }
3540
3541
3542 void
3543 xsettitle(char *p) {
3544 XTextProperty prop;
3545
3546 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3547 &prop);
3548 XSetWMName(xw.dpy, xw.win, &prop);
3549 XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
3550 XFree(prop.value);
3551 }
3552
3553 void
3554 xresettitle(void) {
3555 xsettitle(opt_title ? opt_title : "st");
3556 }
3557
3558 void
3559 redraw(void) {
3560 tfulldirt();
3561 draw();
3562 }
3563
3564 void
3565 draw(void) {
3566 drawregion(0, 0, term.col, term.row);
3567 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3568 xw.h, 0, 0);
3569 XSetForeground(xw.dpy, dc.gc,
3570 dc.col[IS_SET(MODE_REVERSE)?
3571 defaultfg : defaultbg].pixel);
3572 }
3573
3574 void
3575 drawregion(int x1, int y1, int x2, int y2) {
3576 int ic, ib, x, y, ox, sl;
3577 Glyph base, new;
3578 char buf[DRAW_BUF_SIZ];
3579 bool ena_sel = sel.ob.x != -1 && sel.alt == IS_SET(MODE_ALTSCREEN);
3580 long unicodep;
3581
3582 if(!(xw.state & WIN_VISIBLE))
3583 return;
3584
3585 for(y = y1; y < y2; y++) {
3586 if(!term.dirty[y])
3587 continue;
3588
3589 xtermclear(0, y, term.col, y);
3590 term.dirty[y] = 0;
3591 base = term.line[y][0];
3592 ic = ib = ox = 0;
3593 for(x = x1; x < x2; x++) {
3594 new = term.line[y][x];
3595 if(new.mode == ATTR_WDUMMY)
3596 continue;
3597 if(ena_sel && selected(x, y))
3598 new.mode ^= ATTR_REVERSE;
3599 if(ib > 0 && (ATTRCMP(base, new)
3600 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3601 xdraws(buf, base, ox, y, ic, ib);
3602 ic = ib = 0;
3603 }
3604 if(ib == 0) {
3605 ox = x;
3606 base = new;
3607 }
3608
3609 sl = utf8decode(new.c, &unicodep, UTF_SIZ);
3610 memcpy(buf+ib, new.c, sl);
3611 ib += sl;
3612 ic += (new.mode & ATTR_WIDE)? 2 : 1;
3613 }
3614 if(ib > 0)
3615 xdraws(buf, base, ox, y, ic, ib);
3616 }
3617 xdrawcursor();
3618 }
3619
3620 void
3621 expose(XEvent *ev) {
3622 XExposeEvent *e = &ev->xexpose;
3623
3624 if(xw.state & WIN_REDRAW) {
3625 if(!e->count)
3626 xw.state &= ~WIN_REDRAW;
3627 }
3628 redraw();
3629 }
3630
3631 void
3632 visibility(XEvent *ev) {
3633 XVisibilityEvent *e = &ev->xvisibility;
3634
3635 if(e->state == VisibilityFullyObscured) {
3636 xw.state &= ~WIN_VISIBLE;
3637 } else if(!(xw.state & WIN_VISIBLE)) {
3638 /* need a full redraw for next Expose, not just a buf copy */
3639 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3640 }
3641 }
3642
3643 void
3644 unmap(XEvent *ev) {
3645 xw.state &= ~WIN_VISIBLE;
3646 }
3647
3648 void
3649 xsetpointermotion(int set) {
3650 MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
3651 XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
3652 }
3653
3654 void
3655 xseturgency(int add) {
3656 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3657
3658 MODBIT(h->flags, add, XUrgencyHint);
3659 XSetWMHints(xw.dpy, xw.win, h);
3660 XFree(h);
3661 }
3662
3663 void
3664 focus(XEvent *ev) {
3665 XFocusChangeEvent *e = &ev->xfocus;
3666
3667 if(e->mode == NotifyGrab)
3668 return;
3669
3670 if(ev->type == FocusIn) {
3671 XSetICFocus(xw.xic);
3672 xw.state |= WIN_FOCUSED;
3673 xseturgency(0);
3674 if(IS_SET(MODE_FOCUS))
3675 ttywrite("\033[I", 3);
3676 } else {
3677 XUnsetICFocus(xw.xic);
3678 xw.state &= ~WIN_FOCUSED;
3679 if(IS_SET(MODE_FOCUS))
3680 ttywrite("\033[O", 3);
3681 }
3682 }
3683
3684 static inline bool
3685 match(uint mask, uint state) {
3686 return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
3687 }
3688
3689 void
3690 numlock(const Arg *dummy) {
3691 term.numlock ^= 1;
3692 }
3693
3694 char*
3695 kmap(KeySym k, uint state) {
3696 Key *kp;
3697 int i;
3698
3699 /* Check for mapped keys out of X11 function keys. */
3700 for(i = 0; i < LEN(mappedkeys); i++) {
3701 if(mappedkeys[i] == k)
3702 break;
3703 }
3704 if(i == LEN(mappedkeys)) {
3705 if((k & 0xFFFF) < 0xFD00)
3706 return NULL;
3707 }
3708
3709 for(kp = key; kp < key + LEN(key); kp++) {
3710 if(kp->k != k)
3711 continue;
3712
3713 if(!match(kp->mask, state))
3714 continue;
3715
3716 if(IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
3717 continue;
3718 if(term.numlock && kp->appkey == 2)
3719 continue;
3720
3721 if(IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
3722 continue;
3723
3724 if(IS_SET(MODE_CRLF) ? kp->crlf < 0 : kp->crlf > 0)
3725 continue;
3726
3727 return kp->s;
3728 }
3729
3730 return NULL;
3731 }
3732
3733 void
3734 kpress(XEvent *ev) {
3735 XKeyEvent *e = &ev->xkey;
3736 KeySym ksym;
3737 char buf[32], *customkey;
3738 int len;
3739 long c;
3740 Status status;
3741 Shortcut *bp;
3742
3743 if(IS_SET(MODE_KBDLOCK))
3744 return;
3745
3746 len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
3747 /* 1. shortcuts */
3748 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3749 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3750 bp->func(&(bp->arg));
3751 return;
3752 }
3753 }
3754
3755 /* 2. custom keys from config.h */
3756 if((customkey = kmap(ksym, e->state))) {
3757 ttysend(customkey, strlen(customkey));
3758 return;
3759 }
3760
3761 /* 3. composed string from input method */
3762 if(len == 0)
3763 return;
3764 if(len == 1 && e->state & Mod1Mask) {
3765 if(IS_SET(MODE_8BIT)) {
3766 if(*buf < 0177) {
3767 c = *buf | 0x80;
3768 len = utf8encode(c, buf, UTF_SIZ);
3769 }
3770 } else {
3771 buf[1] = buf[0];
3772 buf[0] = '\033';
3773 len = 2;
3774 }
3775 }
3776 ttysend(buf, len);
3777 }
3778
3779
3780 void
3781 cmessage(XEvent *e) {
3782 /*
3783 * See xembed specs
3784 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3785 */
3786 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3787 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3788 xw.state |= WIN_FOCUSED;
3789 xseturgency(0);
3790 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3791 xw.state &= ~WIN_FOCUSED;
3792 }
3793 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3794 /* Send SIGHUP to shell */
3795 kill(pid, SIGHUP);
3796 exit(EXIT_SUCCESS);
3797 }
3798 }
3799
3800 void
3801 cresize(int width, int height) {
3802 int col, row;
3803
3804 if(width != 0)
3805 xw.w = width;
3806 if(height != 0)
3807 xw.h = height;
3808
3809 col = (xw.w - 2 * borderpx) / xw.cw;
3810 row = (xw.h - 2 * borderpx) / xw.ch;
3811
3812 tresize(col, row);
3813 xresize(col, row);
3814 ttyresize();
3815 }
3816
3817 void
3818 resize(XEvent *e) {
3819 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3820 return;
3821
3822 cresize(e->xconfigure.width, e->xconfigure.height);
3823 }
3824
3825 void
3826 run(void) {
3827 XEvent ev;
3828 int w = xw.w, h = xw.h;
3829 fd_set rfd;
3830 int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3831 struct timespec drawtimeout, *tv = NULL, now, last, lastblink;
3832 long deltatime;
3833
3834 /* Waiting for window mapping */
3835 while(1) {
3836 XNextEvent(xw.dpy, &ev);
3837 if(XFilterEvent(&ev, None))
3838 continue;
3839 if(ev.type == ConfigureNotify) {
3840 w = ev.xconfigure.width;
3841 h = ev.xconfigure.height;
3842 } else if(ev.type == MapNotify) {
3843 break;
3844 }
3845 }
3846
3847 ttynew();
3848 cresize(w, h);
3849
3850 clock_gettime(CLOCK_MONOTONIC, &last);
3851 lastblink = last;
3852
3853 for(xev = actionfps;;) {
3854 FD_ZERO(&rfd);
3855 FD_SET(cmdfd, &rfd);
3856 FD_SET(xfd, &rfd);
3857
3858 if(pselect(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv, NULL) < 0) {
3859 if(errno == EINTR)
3860 continue;
3861 die("select failed: %s\n", strerror(errno));
3862 }
3863 if(FD_ISSET(cmdfd, &rfd)) {
3864 ttyread();
3865 if(blinktimeout) {
3866 blinkset = tattrset(ATTR_BLINK);
3867 if(!blinkset)
3868 MODBIT(term.mode, 0, MODE_BLINK);
3869 }
3870 }
3871
3872 if(FD_ISSET(xfd, &rfd))
3873 xev = actionfps;
3874
3875 clock_gettime(CLOCK_MONOTONIC, &now);
3876 drawtimeout.tv_sec = 0;
3877 drawtimeout.tv_nsec = (1000/xfps) * 1E6;
3878 tv = &drawtimeout;
3879
3880 dodraw = 0;
3881 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
3882 tsetdirtattr(ATTR_BLINK);
3883 term.mode ^= MODE_BLINK;
3884 lastblink = now;
3885 dodraw = 1;
3886 }
3887 deltatime = TIMEDIFF(now, last);
3888 if(deltatime > (xev? (1000/xfps) : (1000/actionfps))
3889 || deltatime < 0) {
3890 dodraw = 1;
3891 last = now;
3892 }
3893
3894 if(dodraw) {
3895 while(XPending(xw.dpy)) {
3896 XNextEvent(xw.dpy, &ev);
3897 if(XFilterEvent(&ev, None))
3898 continue;
3899 if(handler[ev.type])
3900 (handler[ev.type])(&ev);
3901 }
3902
3903 draw();
3904 XFlush(xw.dpy);
3905
3906 if(xev && !FD_ISSET(xfd, &rfd))
3907 xev--;
3908 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
3909 if(blinkset) {
3910 if(TIMEDIFF(now, lastblink) \
3911 > blinktimeout) {
3912 drawtimeout.tv_nsec = 1000;
3913 } else {
3914 drawtimeout.tv_nsec = (1E6 * \
3915 (blinktimeout - \
3916 TIMEDIFF(now,
3917 lastblink)));
3918 }
3919 drawtimeout.tv_sec = \
3920 drawtimeout.tv_nsec / 1E9;
3921 drawtimeout.tv_nsec %= (long)1E9;
3922 } else {
3923 tv = NULL;
3924 }
3925 }
3926 }
3927 }
3928 }
3929
3930 void
3931 usage(void) {
3932 die("%s " VERSION " (c) 2010-2015 st engineers\n" \
3933 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]\n"
3934 " [-i] [-t title] [-w windowid] [-e command ...]\n", argv0);
3935 }
3936
3937 int
3938 main(int argc, char *argv[]) {
3939 char *titles;
3940 uint cols = 80, rows = 24;
3941
3942 xw.l = xw.t = 0;
3943 xw.isfixed = False;
3944
3945 ARGBEGIN {
3946 case 'a':
3947 allowaltscreen = false;
3948 break;
3949 case 'c':
3950 opt_class = EARGF(usage());
3951 break;
3952 case 'e':
3953 /* eat all remaining arguments */
3954 if(argc > 1) {
3955 opt_cmd = &argv[1];
3956 if(argv[1] != NULL && opt_title == NULL) {
3957 titles = xstrdup(argv[1]);
3958 opt_title = basename(titles);
3959 }
3960 }
3961 goto run;
3962 case 'f':
3963 opt_font = EARGF(usage());
3964 break;
3965 case 'g':
3966 xw.gm = XParseGeometry(EARGF(usage()),
3967 &xw.l, &xw.t, &cols, &rows);
3968 break;
3969 case 'i':
3970 xw.isfixed = True;
3971 break;
3972 case 'o':
3973 opt_io = EARGF(usage());
3974 break;
3975 case 't':
3976 opt_title = EARGF(usage());
3977 break;
3978 case 'w':
3979 opt_embed = EARGF(usage());
3980 break;
3981 case 'v':
3982 default:
3983 usage();
3984 } ARGEND;
3985
3986 run:
3987 setlocale(LC_CTYPE, "");
3988 XSetLocaleModifiers("");
3989 tnew(cols? cols : 1, rows? rows : 1);
3990 xinit();
3991 selinit();
3992 run();
3993
3994 return 0;
3995 }
3996