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Add a hack to handle unknown chars in fontconfig.
[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 long unicodep;
526 } Fontcache;
527
528 /* Fontcache is an array now. A new font will be appended to the array. */
529 static Fontcache frc[16];
530 static int frclen = 0;
531
532 ssize_t
533 xwrite(int fd, const char *s, size_t len) {
534 size_t aux = len;
535
536 while(len > 0) {
537 ssize_t r = write(fd, s, len);
538 if(r < 0)
539 return r;
540 len -= r;
541 s += r;
542 }
543 return aux;
544 }
545
546 void *
547 xmalloc(size_t len) {
548 void *p = malloc(len);
549
550 if(!p)
551 die("Out of memory\n");
552
553 return p;
554 }
555
556 void *
557 xrealloc(void *p, size_t len) {
558 if((p = realloc(p, len)) == NULL)
559 die("Out of memory\n");
560
561 return p;
562 }
563
564 char *
565 xstrdup(char *s) {
566 if((s = strdup(s)) == NULL)
567 die("Out of memory\n");
568
569 return s;
570 }
571
572 size_t
573 utf8decode(char *c, long *u, size_t clen) {
574 size_t i, j, len, type;
575 long udecoded;
576
577 *u = UTF_INVALID;
578 if(!clen)
579 return 0;
580 udecoded = utf8decodebyte(c[0], &len);
581 if(!BETWEEN(len, 1, UTF_SIZ))
582 return 1;
583 for(i = 1, j = 1; i < clen && j < len; ++i, ++j) {
584 udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
585 if(type != 0)
586 return j;
587 }
588 if(j < len)
589 return 0;
590 *u = udecoded;
591 utf8validate(u, len);
592 return len;
593 }
594
595 long
596 utf8decodebyte(char c, size_t *i) {
597 for(*i = 0; *i < LEN(utfmask); ++(*i))
598 if(((uchar)c & utfmask[*i]) == utfbyte[*i])
599 return (uchar)c & ~utfmask[*i];
600 return 0;
601 }
602
603 size_t
604 utf8encode(long u, char *c, size_t clen) {
605 size_t len, i;
606
607 len = utf8validate(&u, 0);
608 if(clen < len)
609 return 0;
610 for(i = len - 1; i != 0; --i) {
611 c[i] = utf8encodebyte(u, 0);
612 u >>= 6;
613 }
614 c[0] = utf8encodebyte(u, len);
615 return len;
616 }
617
618 char
619 utf8encodebyte(long u, size_t i) {
620 return utfbyte[i] | (u & ~utfmask[i]);
621 }
622
623 size_t
624 utf8len(char *c) {
625 return utf8decode(c, &(long){0}, UTF_SIZ);
626 }
627
628 size_t
629 utf8validate(long *u, size_t i) {
630 if(!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF))
631 *u = UTF_INVALID;
632 for(i = 1; *u > utfmax[i]; ++i)
633 ;
634 return i;
635 }
636
637 static void
638 selinit(void) {
639 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
640 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
641 sel.mode = 0;
642 sel.ob.x = -1;
643 sel.clip = NULL;
644 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
645 if(sel.xtarget == None)
646 sel.xtarget = XA_STRING;
647 }
648
649 static int
650 x2col(int x) {
651 x -= borderpx;
652 x /= xw.cw;
653
654 return LIMIT(x, 0, term.col-1);
655 }
656
657 static int
658 y2row(int y) {
659 y -= borderpx;
660 y /= xw.ch;
661
662 return LIMIT(y, 0, term.row-1);
663 }
664
665 static int tlinelen(int y) {
666 int i = term.col;
667
668 if(term.line[y][i - 1].mode & ATTR_WRAP)
669 return i;
670
671 while(i > 0 && term.line[y][i - 1].c[0] == ' ')
672 --i;
673
674 return i;
675 }
676
677 static void
678 selnormalize(void) {
679 int i;
680
681 if(sel.ob.y == sel.oe.y || sel.type == SEL_RECTANGULAR) {
682 sel.nb.x = MIN(sel.ob.x, sel.oe.x);
683 sel.ne.x = MAX(sel.ob.x, sel.oe.x);
684 } else {
685 sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
686 sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
687 }
688 sel.nb.y = MIN(sel.ob.y, sel.oe.y);
689 sel.ne.y = MAX(sel.ob.y, sel.oe.y);
690
691 selsnap(sel.snap, &sel.nb.x, &sel.nb.y, -1);
692 selsnap(sel.snap, &sel.ne.x, &sel.ne.y, +1);
693
694 /* expand selection over line breaks */
695 if (sel.type == SEL_RECTANGULAR)
696 return;
697 i = tlinelen(sel.nb.y);
698 if (i < sel.nb.x)
699 sel.nb.x = i;
700 if (tlinelen(sel.ne.y) <= sel.ne.x)
701 sel.ne.x = term.col - 1;
702 }
703
704 static inline bool
705 selected(int x, int y) {
706 if(sel.type == SEL_RECTANGULAR)
707 return BETWEEN(y, sel.nb.y, sel.ne.y)
708 && BETWEEN(x, sel.nb.x, sel.ne.x);
709
710 return BETWEEN(y, sel.nb.y, sel.ne.y)
711 && (y != sel.nb.y || x >= sel.nb.x)
712 && (y != sel.ne.y || x <= sel.ne.x);
713 }
714
715 void
716 selsnap(int mode, int *x, int *y, int direction) {
717 int newx, newy, xt, yt;
718 bool delim, prevdelim;
719 Glyph *gp, *prevgp;
720
721 switch(mode) {
722 case SNAP_WORD:
723 /*
724 * Snap around if the word wraps around at the end or
725 * beginning of a line.
726 */
727 prevgp = &term.line[*y][*x];
728 prevdelim = strchr(worddelimiters, prevgp->c[0]) != NULL;
729 for(;;) {
730 newx = *x + direction;
731 newy = *y;
732 if(!BETWEEN(newx, 0, term.col - 1)) {
733 newy += direction;
734 newx = (newx + term.col) % term.col;
735 if (!BETWEEN(newy, 0, term.row - 1))
736 break;
737
738 if(direction > 0)
739 yt = *y, xt = *x;
740 else
741 yt = newy, xt = newx;
742 if(!(term.line[yt][xt].mode & ATTR_WRAP))
743 break;
744 }
745
746 if (newx >= tlinelen(newy))
747 break;
748
749 gp = &term.line[newy][newx];
750 delim = strchr(worddelimiters, gp->c[0]) != NULL;
751 if(!(gp->mode & ATTR_WDUMMY) && (delim != prevdelim
752 || (delim && gp->c[0] != prevgp->c[0])))
753 break;
754
755 *x = newx;
756 *y = newy;
757 prevgp = gp;
758 prevdelim = delim;
759 }
760 break;
761 case SNAP_LINE:
762 /*
763 * Snap around if the the previous line or the current one
764 * has set ATTR_WRAP at its end. Then the whole next or
765 * previous line will be selected.
766 */
767 *x = (direction < 0) ? 0 : term.col - 1;
768 if(direction < 0 && *y > 0) {
769 for(; *y > 0; *y += direction) {
770 if(!(term.line[*y-1][term.col-1].mode
771 & ATTR_WRAP)) {
772 break;
773 }
774 }
775 } else if(direction > 0 && *y < term.row-1) {
776 for(; *y < term.row; *y += direction) {
777 if(!(term.line[*y][term.col-1].mode
778 & ATTR_WRAP)) {
779 break;
780 }
781 }
782 }
783 break;
784 }
785 }
786
787 void
788 getbuttoninfo(XEvent *e) {
789 int type;
790 uint state = e->xbutton.state & ~(Button1Mask | forceselmod);
791
792 sel.alt = IS_SET(MODE_ALTSCREEN);
793
794 sel.oe.x = x2col(e->xbutton.x);
795 sel.oe.y = y2row(e->xbutton.y);
796 selnormalize();
797
798 sel.type = SEL_REGULAR;
799 for(type = 1; type < LEN(selmasks); ++type) {
800 if(match(selmasks[type], state)) {
801 sel.type = type;
802 break;
803 }
804 }
805 }
806
807 void
808 mousereport(XEvent *e) {
809 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
810 button = e->xbutton.button, state = e->xbutton.state,
811 len;
812 char buf[40];
813 static int ox, oy;
814
815 /* from urxvt */
816 if(e->xbutton.type == MotionNotify) {
817 if(x == ox && y == oy)
818 return;
819 if(!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
820 return;
821 /* MOUSE_MOTION: no reporting if no button is pressed */
822 if(IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
823 return;
824
825 button = oldbutton + 32;
826 ox = x;
827 oy = y;
828 } else {
829 if(!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
830 button = 3;
831 } else {
832 button -= Button1;
833 if(button >= 3)
834 button += 64 - 3;
835 }
836 if(e->xbutton.type == ButtonPress) {
837 oldbutton = button;
838 ox = x;
839 oy = y;
840 } else if(e->xbutton.type == ButtonRelease) {
841 oldbutton = 3;
842 /* MODE_MOUSEX10: no button release reporting */
843 if(IS_SET(MODE_MOUSEX10))
844 return;
845 if (button == 64 || button == 65)
846 return;
847 }
848 }
849
850 if(!IS_SET(MODE_MOUSEX10)) {
851 button += (state & ShiftMask ? 4 : 0)
852 + (state & Mod4Mask ? 8 : 0)
853 + (state & ControlMask ? 16 : 0);
854 }
855
856 len = 0;
857 if(IS_SET(MODE_MOUSESGR)) {
858 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
859 button, x+1, y+1,
860 e->xbutton.type == ButtonRelease ? 'm' : 'M');
861 } else if(x < 223 && y < 223) {
862 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
863 32+button, 32+x+1, 32+y+1);
864 } else {
865 return;
866 }
867
868 ttywrite(buf, len);
869 }
870
871 void
872 bpress(XEvent *e) {
873 struct timespec now;
874 Mousekey *mk;
875
876 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
877 mousereport(e);
878 return;
879 }
880
881 for(mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
882 if(e->xbutton.button == mk->b
883 && match(mk->mask, e->xbutton.state)) {
884 ttysend(mk->s, strlen(mk->s));
885 return;
886 }
887 }
888
889 if(e->xbutton.button == Button1) {
890 clock_gettime(CLOCK_MONOTONIC, &now);
891
892 /* Clear previous selection, logically and visually. */
893 selclear(NULL);
894 sel.mode = 1;
895 sel.type = SEL_REGULAR;
896 sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
897 sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
898
899 /*
900 * If the user clicks below predefined timeouts specific
901 * snapping behaviour is exposed.
902 */
903 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
904 sel.snap = SNAP_LINE;
905 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
906 sel.snap = SNAP_WORD;
907 } else {
908 sel.snap = 0;
909 }
910 selnormalize();
911
912 /*
913 * Draw selection, unless it's regular and we don't want to
914 * make clicks visible
915 */
916 if(sel.snap != 0) {
917 sel.mode++;
918 tsetdirt(sel.nb.y, sel.ne.y);
919 }
920 sel.tclick2 = sel.tclick1;
921 sel.tclick1 = now;
922 }
923 }
924
925 char *
926 getsel(void) {
927 char *str, *ptr;
928 int y, bufsize, size, lastx, linelen;
929 Glyph *gp, *last;
930
931 if(sel.ob.x == -1)
932 return NULL;
933
934 bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
935 ptr = str = xmalloc(bufsize);
936
937 /* append every set & selected glyph to the selection */
938 for(y = sel.nb.y; y < sel.ne.y + 1; y++) {
939 linelen = tlinelen(y);
940
941 if(sel.type == SEL_RECTANGULAR) {
942 gp = &term.line[y][sel.nb.x];
943 lastx = sel.ne.x;
944 } else {
945 gp = &term.line[y][sel.nb.y == y ? sel.nb.x : 0];
946 lastx = (sel.ne.y == y) ? sel.ne.x : term.col-1;
947 }
948 last = &term.line[y][MIN(lastx, linelen-1)];
949 while(last >= gp && last->c[0] == ' ')
950 --last;
951
952 for( ; gp <= last; ++gp) {
953 if(gp->mode & ATTR_WDUMMY)
954 continue;
955
956 size = utf8len(gp->c);
957 memcpy(ptr, gp->c, size);
958 ptr += size;
959 }
960
961 /*
962 * Copy and pasting of line endings is inconsistent
963 * in the inconsistent terminal and GUI world.
964 * The best solution seems like to produce '\n' when
965 * something is copied from st and convert '\n' to
966 * '\r', when something to be pasted is received by
967 * st.
968 * FIXME: Fix the computer world.
969 */
970 if((y < sel.ne.y || lastx >= linelen) && !(last->mode & ATTR_WRAP))
971 *ptr++ = '\n';
972 }
973 *ptr = 0;
974 return str;
975 }
976
977 void
978 selcopy(void) {
979 xsetsel(getsel());
980 }
981
982 void
983 selnotify(XEvent *e) {
984 ulong nitems, ofs, rem;
985 int format;
986 uchar *data, *last, *repl;
987 Atom type;
988
989 ofs = 0;
990 do {
991 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
992 False, AnyPropertyType, &type, &format,
993 &nitems, &rem, &data)) {
994 fprintf(stderr, "Clipboard allocation failed\n");
995 return;
996 }
997
998 /*
999 * As seen in getsel:
1000 * Line endings are inconsistent in the terminal and GUI world
1001 * copy and pasting. When receiving some selection data,
1002 * replace all '\n' with '\r'.
1003 * FIXME: Fix the computer world.
1004 */
1005 repl = data;
1006 last = data + nitems * format / 8;
1007 while((repl = memchr(repl, '\n', last - repl))) {
1008 *repl++ = '\r';
1009 }
1010
1011 if(IS_SET(MODE_BRCKTPASTE))
1012 ttywrite("\033[200~", 6);
1013 ttysend((char *)data, nitems * format / 8);
1014 if(IS_SET(MODE_BRCKTPASTE))
1015 ttywrite("\033[201~", 6);
1016 XFree(data);
1017 /* number of 32-bit chunks returned */
1018 ofs += nitems * format / 32;
1019 } while(rem > 0);
1020 }
1021
1022 void
1023 selpaste(const Arg *dummy) {
1024 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
1025 xw.win, CurrentTime);
1026 }
1027
1028 void
1029 clippaste(const Arg *dummy) {
1030 Atom clipboard;
1031
1032 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1033 XConvertSelection(xw.dpy, clipboard, sel.xtarget, XA_PRIMARY,
1034 xw.win, CurrentTime);
1035 }
1036
1037 void
1038 selclear(XEvent *e) {
1039 if(sel.ob.x == -1)
1040 return;
1041 sel.ob.x = -1;
1042 tsetdirt(sel.nb.y, sel.ne.y);
1043 }
1044
1045 void
1046 selrequest(XEvent *e) {
1047 XSelectionRequestEvent *xsre;
1048 XSelectionEvent xev;
1049 Atom xa_targets, string;
1050
1051 xsre = (XSelectionRequestEvent *) e;
1052 xev.type = SelectionNotify;
1053 xev.requestor = xsre->requestor;
1054 xev.selection = xsre->selection;
1055 xev.target = xsre->target;
1056 xev.time = xsre->time;
1057 /* reject */
1058 xev.property = None;
1059
1060 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
1061 if(xsre->target == xa_targets) {
1062 /* respond with the supported type */
1063 string = sel.xtarget;
1064 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1065 XA_ATOM, 32, PropModeReplace,
1066 (uchar *) &string, 1);
1067 xev.property = xsre->property;
1068 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
1069 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1070 xsre->target, 8, PropModeReplace,
1071 (uchar *) sel.clip, strlen(sel.clip));
1072 xev.property = xsre->property;
1073 }
1074
1075 /* all done, send a notification to the listener */
1076 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
1077 fprintf(stderr, "Error sending SelectionNotify event\n");
1078 }
1079
1080 void
1081 xsetsel(char *str) {
1082 /* register the selection for both the clipboard and the primary */
1083 Atom clipboard;
1084
1085 free(sel.clip);
1086 sel.clip = str;
1087
1088 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
1089
1090 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1091 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
1092 }
1093
1094 void
1095 brelease(XEvent *e) {
1096 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1097 mousereport(e);
1098 return;
1099 }
1100
1101 if(e->xbutton.button == Button2) {
1102 selpaste(NULL);
1103 } else if(e->xbutton.button == Button1) {
1104 if(sel.mode < 2) {
1105 selclear(NULL);
1106 } else {
1107 getbuttoninfo(e);
1108 selcopy();
1109 }
1110 sel.mode = 0;
1111 tsetdirt(sel.nb.y, sel.ne.y);
1112 }
1113 }
1114
1115 void
1116 bmotion(XEvent *e) {
1117 int oldey, oldex, oldsby, oldsey;
1118
1119 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1120 mousereport(e);
1121 return;
1122 }
1123
1124 if(!sel.mode)
1125 return;
1126
1127 sel.mode++;
1128 oldey = sel.oe.y;
1129 oldex = sel.oe.x;
1130 oldsby = sel.nb.y;
1131 oldsey = sel.ne.y;
1132 getbuttoninfo(e);
1133
1134 if(oldey != sel.oe.y || oldex != sel.oe.x)
1135 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
1136 }
1137
1138 void
1139 die(const char *errstr, ...) {
1140 va_list ap;
1141
1142 va_start(ap, errstr);
1143 vfprintf(stderr, errstr, ap);
1144 va_end(ap);
1145 exit(EXIT_FAILURE);
1146 }
1147
1148 void
1149 execsh(void) {
1150 char **args, *sh, *prog;
1151 const struct passwd *pw;
1152 char buf[sizeof(long) * 8 + 1];
1153
1154 errno = 0;
1155 if((pw = getpwuid(getuid())) == NULL) {
1156 if(errno)
1157 die("getpwuid:%s\n", strerror(errno));
1158 else
1159 die("who are you?\n");
1160 }
1161
1162 if (!(sh = getenv("SHELL"))) {
1163 sh = (pw->pw_shell[0]) ? pw->pw_shell : shell;
1164 }
1165
1166 if(opt_cmd)
1167 prog = opt_cmd[0];
1168 else if(utmp)
1169 prog = utmp;
1170 else
1171 prog = sh;
1172 args = (opt_cmd) ? opt_cmd : (char *[]) {prog, NULL};
1173
1174 snprintf(buf, sizeof(buf), "%lu", xw.win);
1175
1176 unsetenv("COLUMNS");
1177 unsetenv("LINES");
1178 unsetenv("TERMCAP");
1179 setenv("LOGNAME", pw->pw_name, 1);
1180 setenv("USER", pw->pw_name, 1);
1181 setenv("SHELL", sh, 1);
1182 setenv("HOME", pw->pw_dir, 1);
1183 setenv("TERM", termname, 1);
1184 setenv("WINDOWID", buf, 1);
1185
1186 signal(SIGCHLD, SIG_DFL);
1187 signal(SIGHUP, SIG_DFL);
1188 signal(SIGINT, SIG_DFL);
1189 signal(SIGQUIT, SIG_DFL);
1190 signal(SIGTERM, SIG_DFL);
1191 signal(SIGALRM, SIG_DFL);
1192
1193 execvp(prog, args);
1194 _exit(EXIT_FAILURE);
1195 }
1196
1197 void
1198 sigchld(int a) {
1199 int stat, ret;
1200
1201 if(waitpid(pid, &stat, 0) < 0)
1202 die("Waiting for pid %hd failed: %s\n", pid, strerror(errno));
1203
1204 ret = WIFEXITED(stat) ? WEXITSTATUS(stat) : EXIT_FAILURE;
1205 if (ret != EXIT_SUCCESS)
1206 die("child finished with error '%d'\n", stat);
1207 exit(EXIT_SUCCESS);
1208 }
1209
1210 void
1211 ttynew(void) {
1212 int m, s;
1213 struct winsize w = {term.row, term.col, 0, 0};
1214
1215 /* seems to work fine on linux, openbsd and freebsd */
1216 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1217 die("openpty failed: %s\n", strerror(errno));
1218
1219 switch(pid = fork()) {
1220 case -1:
1221 die("fork failed\n");
1222 break;
1223 case 0:
1224 setsid(); /* create a new process group */
1225 dup2(s, STDIN_FILENO);
1226 dup2(s, STDOUT_FILENO);
1227 dup2(s, STDERR_FILENO);
1228 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1229 die("ioctl TIOCSCTTY failed: %s\n", strerror(errno));
1230 close(s);
1231 close(m);
1232 execsh();
1233 break;
1234 default:
1235 close(s);
1236 cmdfd = m;
1237 signal(SIGCHLD, sigchld);
1238 if(opt_io) {
1239 term.mode |= MODE_PRINT;
1240 iofd = (!strcmp(opt_io, "-")) ?
1241 STDOUT_FILENO :
1242 open(opt_io, O_WRONLY | O_CREAT, 0666);
1243 if(iofd < 0) {
1244 fprintf(stderr, "Error opening %s:%s\n",
1245 opt_io, strerror(errno));
1246 }
1247 }
1248 break;
1249 }
1250 }
1251
1252 void
1253 ttyread(void) {
1254 static char buf[BUFSIZ];
1255 static int buflen = 0;
1256 char *ptr;
1257 char s[UTF_SIZ];
1258 int charsize; /* size of utf8 char in bytes */
1259 long unicodep;
1260 int ret;
1261
1262 /* append read bytes to unprocessed bytes */
1263 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1264 die("Couldn't read from shell: %s\n", strerror(errno));
1265
1266 /* process every complete utf8 char */
1267 buflen += ret;
1268 ptr = buf;
1269 while((charsize = utf8decode(ptr, &unicodep, buflen))) {
1270 utf8encode(unicodep, s, UTF_SIZ);
1271 tputc(s, charsize);
1272 ptr += charsize;
1273 buflen -= charsize;
1274 }
1275
1276 /* keep any uncomplete utf8 char for the next call */
1277 memmove(buf, ptr, buflen);
1278 }
1279
1280 void
1281 ttywrite(const char *s, size_t n) {
1282 if(xwrite(cmdfd, s, n) == -1)
1283 die("write error on tty: %s\n", strerror(errno));
1284 }
1285
1286 void
1287 ttysend(char *s, size_t n) {
1288 ttywrite(s, n);
1289 if(IS_SET(MODE_ECHO))
1290 techo(s, n);
1291 }
1292
1293 void
1294 ttyresize(void) {
1295 struct winsize w;
1296
1297 w.ws_row = term.row;
1298 w.ws_col = term.col;
1299 w.ws_xpixel = xw.tw;
1300 w.ws_ypixel = xw.th;
1301 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1302 fprintf(stderr, "Couldn't set window size: %s\n", strerror(errno));
1303 }
1304
1305 int
1306 tattrset(int attr) {
1307 int i, j;
1308
1309 for(i = 0; i < term.row-1; i++) {
1310 for(j = 0; j < term.col-1; j++) {
1311 if(term.line[i][j].mode & attr)
1312 return 1;
1313 }
1314 }
1315
1316 return 0;
1317 }
1318
1319 void
1320 tsetdirt(int top, int bot) {
1321 int i;
1322
1323 LIMIT(top, 0, term.row-1);
1324 LIMIT(bot, 0, term.row-1);
1325
1326 for(i = top; i <= bot; i++)
1327 term.dirty[i] = 1;
1328 }
1329
1330 void
1331 tsetdirtattr(int attr) {
1332 int i, j;
1333
1334 for(i = 0; i < term.row-1; i++) {
1335 for(j = 0; j < term.col-1; j++) {
1336 if(term.line[i][j].mode & attr) {
1337 tsetdirt(i, i);
1338 break;
1339 }
1340 }
1341 }
1342 }
1343
1344 void
1345 tfulldirt(void) {
1346 tsetdirt(0, term.row-1);
1347 }
1348
1349 void
1350 tcursor(int mode) {
1351 static TCursor c[2];
1352 bool alt = IS_SET(MODE_ALTSCREEN);
1353
1354 if(mode == CURSOR_SAVE) {
1355 c[alt] = term.c;
1356 } else if(mode == CURSOR_LOAD) {
1357 term.c = c[alt];
1358 tmoveto(c[alt].x, c[alt].y);
1359 }
1360 }
1361
1362 void
1363 treset(void) {
1364 uint i;
1365
1366 term.c = (TCursor){{
1367 .mode = ATTR_NULL,
1368 .fg = defaultfg,
1369 .bg = defaultbg
1370 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1371
1372 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1373 for(i = tabspaces; i < term.col; i += tabspaces)
1374 term.tabs[i] = 1;
1375 term.top = 0;
1376 term.bot = term.row - 1;
1377 term.mode = MODE_WRAP;
1378 memset(term.trantbl, sizeof(term.trantbl), CS_USA);
1379 term.charset = 0;
1380
1381 for(i = 0; i < 2; i++) {
1382 tmoveto(0, 0);
1383 tcursor(CURSOR_SAVE);
1384 tclearregion(0, 0, term.col-1, term.row-1);
1385 tswapscreen();
1386 }
1387 }
1388
1389 void
1390 tnew(int col, int row) {
1391 term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } };
1392 tresize(col, row);
1393 term.numlock = 1;
1394
1395 treset();
1396 }
1397
1398 void
1399 tswapscreen(void) {
1400 Line *tmp = term.line;
1401
1402 term.line = term.alt;
1403 term.alt = tmp;
1404 term.mode ^= MODE_ALTSCREEN;
1405 tfulldirt();
1406 }
1407
1408 void
1409 tscrolldown(int orig, int n) {
1410 int i;
1411 Line temp;
1412
1413 LIMIT(n, 0, term.bot-orig+1);
1414
1415 tsetdirt(orig, term.bot-n);
1416 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1417
1418 for(i = term.bot; i >= orig+n; i--) {
1419 temp = term.line[i];
1420 term.line[i] = term.line[i-n];
1421 term.line[i-n] = temp;
1422 }
1423
1424 selscroll(orig, n);
1425 }
1426
1427 void
1428 tscrollup(int orig, int n) {
1429 int i;
1430 Line temp;
1431
1432 LIMIT(n, 0, term.bot-orig+1);
1433
1434 tclearregion(0, orig, term.col-1, orig+n-1);
1435 tsetdirt(orig+n, term.bot);
1436
1437 for(i = orig; i <= term.bot-n; i++) {
1438 temp = term.line[i];
1439 term.line[i] = term.line[i+n];
1440 term.line[i+n] = temp;
1441 }
1442
1443 selscroll(orig, -n);
1444 }
1445
1446 void
1447 selscroll(int orig, int n) {
1448 if(sel.ob.x == -1)
1449 return;
1450
1451 if(BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
1452 if((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
1453 selclear(NULL);
1454 return;
1455 }
1456 if(sel.type == SEL_RECTANGULAR) {
1457 if(sel.ob.y < term.top)
1458 sel.ob.y = term.top;
1459 if(sel.oe.y > term.bot)
1460 sel.oe.y = term.bot;
1461 } else {
1462 if(sel.ob.y < term.top) {
1463 sel.ob.y = term.top;
1464 sel.ob.x = 0;
1465 }
1466 if(sel.oe.y > term.bot) {
1467 sel.oe.y = term.bot;
1468 sel.oe.x = term.col;
1469 }
1470 }
1471 selnormalize();
1472 }
1473 }
1474
1475 void
1476 tnewline(int first_col) {
1477 int y = term.c.y;
1478
1479 if(y == term.bot) {
1480 tscrollup(term.top, 1);
1481 } else {
1482 y++;
1483 }
1484 tmoveto(first_col ? 0 : term.c.x, y);
1485 }
1486
1487 void
1488 csiparse(void) {
1489 char *p = csiescseq.buf, *np;
1490 long int v;
1491
1492 csiescseq.narg = 0;
1493 if(*p == '?') {
1494 csiescseq.priv = 1;
1495 p++;
1496 }
1497
1498 csiescseq.buf[csiescseq.len] = '\0';
1499 while(p < csiescseq.buf+csiescseq.len) {
1500 np = NULL;
1501 v = strtol(p, &np, 10);
1502 if(np == p)
1503 v = 0;
1504 if(v == LONG_MAX || v == LONG_MIN)
1505 v = -1;
1506 csiescseq.arg[csiescseq.narg++] = v;
1507 p = np;
1508 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1509 break;
1510 p++;
1511 }
1512 csiescseq.mode = *p;
1513 }
1514
1515 /* for absolute user moves, when decom is set */
1516 void
1517 tmoveato(int x, int y) {
1518 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1519 }
1520
1521 void
1522 tmoveto(int x, int y) {
1523 int miny, maxy;
1524
1525 if(term.c.state & CURSOR_ORIGIN) {
1526 miny = term.top;
1527 maxy = term.bot;
1528 } else {
1529 miny = 0;
1530 maxy = term.row - 1;
1531 }
1532 LIMIT(x, 0, term.col-1);
1533 LIMIT(y, miny, maxy);
1534 term.c.state &= ~CURSOR_WRAPNEXT;
1535 term.c.x = x;
1536 term.c.y = y;
1537 }
1538
1539 void
1540 tsetchar(char *c, Glyph *attr, int x, int y) {
1541 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1542 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1543 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1544 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1545 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1546 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1547 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1548 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1549 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1550 };
1551
1552 /*
1553 * The table is proudly stolen from rxvt.
1554 */
1555 if(term.trantbl[term.charset] == CS_GRAPHIC0) {
1556 if(BETWEEN(c[0], 0x41, 0x7e) && vt100_0[c[0] - 0x41]) {
1557 c = vt100_0[c[0] - 0x41];
1558 }
1559 }
1560
1561 if(term.line[y][x].mode & ATTR_WIDE) {
1562 if(x+1 < term.col) {
1563 term.line[y][x+1].c[0] = ' ';
1564 term.line[y][x+1].mode &= ~ATTR_WDUMMY;
1565 }
1566 } else if(term.line[y][x].mode & ATTR_WDUMMY) {
1567 term.line[y][x-1].c[0] = ' ';
1568 term.line[y][x-1].mode &= ~ATTR_WIDE;
1569 }
1570
1571 term.dirty[y] = 1;
1572 term.line[y][x] = *attr;
1573 memcpy(term.line[y][x].c, c, UTF_SIZ);
1574 }
1575
1576 void
1577 tclearregion(int x1, int y1, int x2, int y2) {
1578 int x, y, temp;
1579 Glyph *gp;
1580
1581 if(x1 > x2)
1582 temp = x1, x1 = x2, x2 = temp;
1583 if(y1 > y2)
1584 temp = y1, y1 = y2, y2 = temp;
1585
1586 LIMIT(x1, 0, term.col-1);
1587 LIMIT(x2, 0, term.col-1);
1588 LIMIT(y1, 0, term.row-1);
1589 LIMIT(y2, 0, term.row-1);
1590
1591 for(y = y1; y <= y2; y++) {
1592 term.dirty[y] = 1;
1593 for(x = x1; x <= x2; x++) {
1594 gp = &term.line[y][x];
1595 if(selected(x, y))
1596 selclear(NULL);
1597 gp->fg = term.c.attr.fg;
1598 gp->bg = term.c.attr.bg;
1599 gp->mode = 0;
1600 memcpy(gp->c, " ", 2);
1601 }
1602 }
1603 }
1604
1605 void
1606 tdeletechar(int n) {
1607 int dst, src, size;
1608 Glyph *line;
1609
1610 LIMIT(n, 0, term.col - term.c.x);
1611
1612 dst = term.c.x;
1613 src = term.c.x + n;
1614 size = term.col - src;
1615 line = term.line[term.c.y];
1616
1617 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1618 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1619 }
1620
1621 void
1622 tinsertblank(int n) {
1623 int dst, src, size;
1624 Glyph *line;
1625
1626 LIMIT(n, 0, term.col - term.c.x);
1627
1628 dst = term.c.x + n;
1629 src = term.c.x;
1630 size = term.col - dst;
1631 line = term.line[term.c.y];
1632
1633 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1634 tclearregion(src, term.c.y, dst - 1, term.c.y);
1635 }
1636
1637 void
1638 tinsertblankline(int n) {
1639 if(BETWEEN(term.c.y, term.top, term.bot))
1640 tscrolldown(term.c.y, n);
1641 }
1642
1643 void
1644 tdeleteline(int n) {
1645 if(BETWEEN(term.c.y, term.top, term.bot))
1646 tscrollup(term.c.y, n);
1647 }
1648
1649 int32_t
1650 tdefcolor(int *attr, int *npar, int l) {
1651 int32_t idx = -1;
1652 uint r, g, b;
1653
1654 switch (attr[*npar + 1]) {
1655 case 2: /* direct color in RGB space */
1656 if (*npar + 4 >= l) {
1657 fprintf(stderr,
1658 "erresc(38): Incorrect number of parameters (%d)\n",
1659 *npar);
1660 break;
1661 }
1662 r = attr[*npar + 2];
1663 g = attr[*npar + 3];
1664 b = attr[*npar + 4];
1665 *npar += 4;
1666 if(!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
1667 fprintf(stderr, "erresc: bad rgb color (%d,%d,%d)\n",
1668 r, g, b);
1669 else
1670 idx = TRUECOLOR(r, g, b);
1671 break;
1672 case 5: /* indexed color */
1673 if (*npar + 2 >= l) {
1674 fprintf(stderr,
1675 "erresc(38): Incorrect number of parameters (%d)\n",
1676 *npar);
1677 break;
1678 }
1679 *npar += 2;
1680 if(!BETWEEN(attr[*npar], 0, 255))
1681 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
1682 else
1683 idx = attr[*npar];
1684 break;
1685 case 0: /* implemented defined (only foreground) */
1686 case 1: /* transparent */
1687 case 3: /* direct color in CMY space */
1688 case 4: /* direct color in CMYK space */
1689 default:
1690 fprintf(stderr,
1691 "erresc(38): gfx attr %d unknown\n", attr[*npar]);
1692 break;
1693 }
1694
1695 return idx;
1696 }
1697
1698 void
1699 tsetattr(int *attr, int l) {
1700 int i;
1701 int32_t idx;
1702
1703 for(i = 0; i < l; i++) {
1704 switch(attr[i]) {
1705 case 0:
1706 term.c.attr.mode &= ~(
1707 ATTR_BOLD |
1708 ATTR_FAINT |
1709 ATTR_ITALIC |
1710 ATTR_UNDERLINE |
1711 ATTR_BLINK |
1712 ATTR_REVERSE |
1713 ATTR_INVISIBLE |
1714 ATTR_STRUCK );
1715 term.c.attr.fg = defaultfg;
1716 term.c.attr.bg = defaultbg;
1717 break;
1718 case 1:
1719 term.c.attr.mode |= ATTR_BOLD;
1720 break;
1721 case 2:
1722 term.c.attr.mode |= ATTR_FAINT;
1723 break;
1724 case 3:
1725 term.c.attr.mode |= ATTR_ITALIC;
1726 break;
1727 case 4:
1728 term.c.attr.mode |= ATTR_UNDERLINE;
1729 break;
1730 case 5: /* slow blink */
1731 /* FALLTHROUGH */
1732 case 6: /* rapid blink */
1733 term.c.attr.mode |= ATTR_BLINK;
1734 break;
1735 case 7:
1736 term.c.attr.mode |= ATTR_REVERSE;
1737 break;
1738 case 8:
1739 term.c.attr.mode |= ATTR_INVISIBLE;
1740 break;
1741 case 9:
1742 term.c.attr.mode |= ATTR_STRUCK;
1743 break;
1744 case 22:
1745 term.c.attr.mode &= ~(ATTR_BOLD | ATTR_FAINT);
1746 break;
1747 case 23:
1748 term.c.attr.mode &= ~ATTR_ITALIC;
1749 break;
1750 case 24:
1751 term.c.attr.mode &= ~ATTR_UNDERLINE;
1752 break;
1753 case 25:
1754 term.c.attr.mode &= ~ATTR_BLINK;
1755 break;
1756 case 27:
1757 term.c.attr.mode &= ~ATTR_REVERSE;
1758 break;
1759 case 28:
1760 term.c.attr.mode &= ~ATTR_INVISIBLE;
1761 break;
1762 case 29:
1763 term.c.attr.mode &= ~ATTR_STRUCK;
1764 break;
1765 case 38:
1766 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1767 term.c.attr.fg = idx;
1768 break;
1769 case 39:
1770 term.c.attr.fg = defaultfg;
1771 break;
1772 case 48:
1773 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1774 term.c.attr.bg = idx;
1775 break;
1776 case 49:
1777 term.c.attr.bg = defaultbg;
1778 break;
1779 default:
1780 if(BETWEEN(attr[i], 30, 37)) {
1781 term.c.attr.fg = attr[i] - 30;
1782 } else if(BETWEEN(attr[i], 40, 47)) {
1783 term.c.attr.bg = attr[i] - 40;
1784 } else if(BETWEEN(attr[i], 90, 97)) {
1785 term.c.attr.fg = attr[i] - 90 + 8;
1786 } else if(BETWEEN(attr[i], 100, 107)) {
1787 term.c.attr.bg = attr[i] - 100 + 8;
1788 } else {
1789 fprintf(stderr,
1790 "erresc(default): gfx attr %d unknown\n",
1791 attr[i]), csidump();
1792 }
1793 break;
1794 }
1795 }
1796 }
1797
1798 void
1799 tsetscroll(int t, int b) {
1800 int temp;
1801
1802 LIMIT(t, 0, term.row-1);
1803 LIMIT(b, 0, term.row-1);
1804 if(t > b) {
1805 temp = t;
1806 t = b;
1807 b = temp;
1808 }
1809 term.top = t;
1810 term.bot = b;
1811 }
1812
1813 void
1814 tsetmode(bool priv, bool set, int *args, int narg) {
1815 int *lim, mode;
1816 bool alt;
1817
1818 for(lim = args + narg; args < lim; ++args) {
1819 if(priv) {
1820 switch(*args) {
1821 case 1: /* DECCKM -- Cursor key */
1822 MODBIT(term.mode, set, MODE_APPCURSOR);
1823 break;
1824 case 5: /* DECSCNM -- Reverse video */
1825 mode = term.mode;
1826 MODBIT(term.mode, set, MODE_REVERSE);
1827 if(mode != term.mode)
1828 redraw();
1829 break;
1830 case 6: /* DECOM -- Origin */
1831 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1832 tmoveato(0, 0);
1833 break;
1834 case 7: /* DECAWM -- Auto wrap */
1835 MODBIT(term.mode, set, MODE_WRAP);
1836 break;
1837 case 0: /* Error (IGNORED) */
1838 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1839 case 3: /* DECCOLM -- Column (IGNORED) */
1840 case 4: /* DECSCLM -- Scroll (IGNORED) */
1841 case 8: /* DECARM -- Auto repeat (IGNORED) */
1842 case 18: /* DECPFF -- Printer feed (IGNORED) */
1843 case 19: /* DECPEX -- Printer extent (IGNORED) */
1844 case 42: /* DECNRCM -- National characters (IGNORED) */
1845 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1846 break;
1847 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1848 MODBIT(term.mode, !set, MODE_HIDE);
1849 break;
1850 case 9: /* X10 mouse compatibility mode */
1851 xsetpointermotion(0);
1852 MODBIT(term.mode, 0, MODE_MOUSE);
1853 MODBIT(term.mode, set, MODE_MOUSEX10);
1854 break;
1855 case 1000: /* 1000: report button press */
1856 xsetpointermotion(0);
1857 MODBIT(term.mode, 0, MODE_MOUSE);
1858 MODBIT(term.mode, set, MODE_MOUSEBTN);
1859 break;
1860 case 1002: /* 1002: report motion on button press */
1861 xsetpointermotion(0);
1862 MODBIT(term.mode, 0, MODE_MOUSE);
1863 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1864 break;
1865 case 1003: /* 1003: enable all mouse motions */
1866 xsetpointermotion(set);
1867 MODBIT(term.mode, 0, MODE_MOUSE);
1868 MODBIT(term.mode, set, MODE_MOUSEMANY);
1869 break;
1870 case 1004: /* 1004: send focus events to tty */
1871 MODBIT(term.mode, set, MODE_FOCUS);
1872 break;
1873 case 1006: /* 1006: extended reporting mode */
1874 MODBIT(term.mode, set, MODE_MOUSESGR);
1875 break;
1876 case 1034:
1877 MODBIT(term.mode, set, MODE_8BIT);
1878 break;
1879 case 1049: /* swap screen & set/restore cursor as xterm */
1880 if (!allowaltscreen)
1881 break;
1882 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1883 /* FALLTHROUGH */
1884 case 47: /* swap screen */
1885 case 1047:
1886 if (!allowaltscreen)
1887 break;
1888 alt = IS_SET(MODE_ALTSCREEN);
1889 if(alt) {
1890 tclearregion(0, 0, term.col-1,
1891 term.row-1);
1892 }
1893 if(set ^ alt) /* set is always 1 or 0 */
1894 tswapscreen();
1895 if(*args != 1049)
1896 break;
1897 /* FALLTHROUGH */
1898 case 1048:
1899 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1900 break;
1901 case 2004: /* 2004: bracketed paste mode */
1902 MODBIT(term.mode, set, MODE_BRCKTPASTE);
1903 break;
1904 /* Not implemented mouse modes. See comments there. */
1905 case 1001: /* mouse highlight mode; can hang the
1906 terminal by design when implemented. */
1907 case 1005: /* UTF-8 mouse mode; will confuse
1908 applications not supporting UTF-8
1909 and luit. */
1910 case 1015: /* urxvt mangled mouse mode; incompatible
1911 and can be mistaken for other control
1912 codes. */
1913 default:
1914 fprintf(stderr,
1915 "erresc: unknown private set/reset mode %d\n",
1916 *args);
1917 break;
1918 }
1919 } else {
1920 switch(*args) {
1921 case 0: /* Error (IGNORED) */
1922 break;
1923 case 2: /* KAM -- keyboard action */
1924 MODBIT(term.mode, set, MODE_KBDLOCK);
1925 break;
1926 case 4: /* IRM -- Insertion-replacement */
1927 MODBIT(term.mode, set, MODE_INSERT);
1928 break;
1929 case 12: /* SRM -- Send/Receive */
1930 MODBIT(term.mode, !set, MODE_ECHO);
1931 break;
1932 case 20: /* LNM -- Linefeed/new line */
1933 MODBIT(term.mode, set, MODE_CRLF);
1934 break;
1935 default:
1936 fprintf(stderr,
1937 "erresc: unknown set/reset mode %d\n",
1938 *args);
1939 break;
1940 }
1941 }
1942 }
1943 }
1944
1945 void
1946 csihandle(void) {
1947 char buf[40];
1948 int len;
1949
1950 switch(csiescseq.mode) {
1951 default:
1952 unknown:
1953 fprintf(stderr, "erresc: unknown csi ");
1954 csidump();
1955 /* die(""); */
1956 break;
1957 case '@': /* ICH -- Insert <n> blank char */
1958 DEFAULT(csiescseq.arg[0], 1);
1959 tinsertblank(csiescseq.arg[0]);
1960 break;
1961 case 'A': /* CUU -- Cursor <n> Up */
1962 DEFAULT(csiescseq.arg[0], 1);
1963 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1964 break;
1965 case 'B': /* CUD -- Cursor <n> Down */
1966 case 'e': /* VPR --Cursor <n> Down */
1967 DEFAULT(csiescseq.arg[0], 1);
1968 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1969 break;
1970 case 'i': /* MC -- Media Copy */
1971 switch(csiescseq.arg[0]) {
1972 case 0:
1973 tdump();
1974 break;
1975 case 1:
1976 tdumpline(term.c.y);
1977 break;
1978 case 2:
1979 tdumpsel();
1980 break;
1981 case 4:
1982 term.mode &= ~MODE_PRINT;
1983 break;
1984 case 5:
1985 term.mode |= MODE_PRINT;
1986 break;
1987 }
1988 break;
1989 case 'c': /* DA -- Device Attributes */
1990 if(csiescseq.arg[0] == 0)
1991 ttywrite(vtiden, sizeof(vtiden) - 1);
1992 break;
1993 case 'C': /* CUF -- Cursor <n> Forward */
1994 case 'a': /* HPR -- Cursor <n> Forward */
1995 DEFAULT(csiescseq.arg[0], 1);
1996 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1997 break;
1998 case 'D': /* CUB -- Cursor <n> Backward */
1999 DEFAULT(csiescseq.arg[0], 1);
2000 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
2001 break;
2002 case 'E': /* CNL -- Cursor <n> Down and first col */
2003 DEFAULT(csiescseq.arg[0], 1);
2004 tmoveto(0, term.c.y+csiescseq.arg[0]);
2005 break;
2006 case 'F': /* CPL -- Cursor <n> Up and first col */
2007 DEFAULT(csiescseq.arg[0], 1);
2008 tmoveto(0, term.c.y-csiescseq.arg[0]);
2009 break;
2010 case 'g': /* TBC -- Tabulation clear */
2011 switch(csiescseq.arg[0]) {
2012 case 0: /* clear current tab stop */
2013 term.tabs[term.c.x] = 0;
2014 break;
2015 case 3: /* clear all the tabs */
2016 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
2017 break;
2018 default:
2019 goto unknown;
2020 }
2021 break;
2022 case 'G': /* CHA -- Move to <col> */
2023 case '`': /* HPA */
2024 DEFAULT(csiescseq.arg[0], 1);
2025 tmoveto(csiescseq.arg[0]-1, term.c.y);
2026 break;
2027 case 'H': /* CUP -- Move to <row> <col> */
2028 case 'f': /* HVP */
2029 DEFAULT(csiescseq.arg[0], 1);
2030 DEFAULT(csiescseq.arg[1], 1);
2031 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
2032 break;
2033 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
2034 DEFAULT(csiescseq.arg[0], 1);
2035 tputtab(csiescseq.arg[0]);
2036 break;
2037 case 'J': /* ED -- Clear screen */
2038 selclear(NULL);
2039 switch(csiescseq.arg[0]) {
2040 case 0: /* below */
2041 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
2042 if(term.c.y < term.row-1) {
2043 tclearregion(0, term.c.y+1, term.col-1,
2044 term.row-1);
2045 }
2046 break;
2047 case 1: /* above */
2048 if(term.c.y > 1)
2049 tclearregion(0, 0, term.col-1, term.c.y-1);
2050 tclearregion(0, term.c.y, term.c.x, term.c.y);
2051 break;
2052 case 2: /* all */
2053 tclearregion(0, 0, term.col-1, term.row-1);
2054 break;
2055 default:
2056 goto unknown;
2057 }
2058 break;
2059 case 'K': /* EL -- Clear line */
2060 switch(csiescseq.arg[0]) {
2061 case 0: /* right */
2062 tclearregion(term.c.x, term.c.y, term.col-1,
2063 term.c.y);
2064 break;
2065 case 1: /* left */
2066 tclearregion(0, term.c.y, term.c.x, term.c.y);
2067 break;
2068 case 2: /* all */
2069 tclearregion(0, term.c.y, term.col-1, term.c.y);
2070 break;
2071 }
2072 break;
2073 case 'S': /* SU -- Scroll <n> line up */
2074 DEFAULT(csiescseq.arg[0], 1);
2075 tscrollup(term.top, csiescseq.arg[0]);
2076 break;
2077 case 'T': /* SD -- Scroll <n> line down */
2078 DEFAULT(csiescseq.arg[0], 1);
2079 tscrolldown(term.top, csiescseq.arg[0]);
2080 break;
2081 case 'L': /* IL -- Insert <n> blank lines */
2082 DEFAULT(csiescseq.arg[0], 1);
2083 tinsertblankline(csiescseq.arg[0]);
2084 break;
2085 case 'l': /* RM -- Reset Mode */
2086 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
2087 break;
2088 case 'M': /* DL -- Delete <n> lines */
2089 DEFAULT(csiescseq.arg[0], 1);
2090 tdeleteline(csiescseq.arg[0]);
2091 break;
2092 case 'X': /* ECH -- Erase <n> char */
2093 DEFAULT(csiescseq.arg[0], 1);
2094 tclearregion(term.c.x, term.c.y,
2095 term.c.x + csiescseq.arg[0] - 1, term.c.y);
2096 break;
2097 case 'P': /* DCH -- Delete <n> char */
2098 DEFAULT(csiescseq.arg[0], 1);
2099 tdeletechar(csiescseq.arg[0]);
2100 break;
2101 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
2102 DEFAULT(csiescseq.arg[0], 1);
2103 tputtab(-csiescseq.arg[0]);
2104 break;
2105 case 'd': /* VPA -- Move to <row> */
2106 DEFAULT(csiescseq.arg[0], 1);
2107 tmoveato(term.c.x, csiescseq.arg[0]-1);
2108 break;
2109 case 'h': /* SM -- Set terminal mode */
2110 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
2111 break;
2112 case 'm': /* SGR -- Terminal attribute (color) */
2113 tsetattr(csiescseq.arg, csiescseq.narg);
2114 break;
2115 case 'n': /* DSR – Device Status Report (cursor position) */
2116 if (csiescseq.arg[0] == 6) {
2117 len = snprintf(buf, sizeof(buf),"\033[%i;%iR",
2118 term.c.y+1, term.c.x+1);
2119 ttywrite(buf, len);
2120 }
2121 break;
2122 case 'r': /* DECSTBM -- Set Scrolling Region */
2123 if(csiescseq.priv) {
2124 goto unknown;
2125 } else {
2126 DEFAULT(csiescseq.arg[0], 1);
2127 DEFAULT(csiescseq.arg[1], term.row);
2128 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
2129 tmoveato(0, 0);
2130 }
2131 break;
2132 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
2133 tcursor(CURSOR_SAVE);
2134 break;
2135 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
2136 tcursor(CURSOR_LOAD);
2137 break;
2138 }
2139 }
2140
2141 void
2142 csidump(void) {
2143 int i;
2144 uint c;
2145
2146 printf("ESC[");
2147 for(i = 0; i < csiescseq.len; i++) {
2148 c = csiescseq.buf[i] & 0xff;
2149 if(isprint(c)) {
2150 putchar(c);
2151 } else if(c == '\n') {
2152 printf("(\\n)");
2153 } else if(c == '\r') {
2154 printf("(\\r)");
2155 } else if(c == 0x1b) {
2156 printf("(\\e)");
2157 } else {
2158 printf("(%02x)", c);
2159 }
2160 }
2161 putchar('\n');
2162 }
2163
2164 void
2165 csireset(void) {
2166 memset(&csiescseq, 0, sizeof(csiescseq));
2167 }
2168
2169 void
2170 strhandle(void) {
2171 char *p = NULL;
2172 int j, narg, par;
2173
2174 term.esc &= ~(ESC_STR_END|ESC_STR);
2175 strparse();
2176 narg = strescseq.narg;
2177 par = atoi(strescseq.args[0]);
2178
2179 switch(strescseq.type) {
2180 case ']': /* OSC -- Operating System Command */
2181 switch(par) {
2182 case 0:
2183 case 1:
2184 case 2:
2185 if(narg > 1)
2186 xsettitle(strescseq.args[1]);
2187 return;
2188 case 4: /* color set */
2189 if(narg < 3)
2190 break;
2191 p = strescseq.args[2];
2192 /* FALLTHROUGH */
2193 case 104: /* color reset, here p = NULL */
2194 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2195 if(xsetcolorname(j, p)) {
2196 fprintf(stderr, "erresc: invalid color %s\n", p);
2197 } else {
2198 /*
2199 * TODO if defaultbg color is changed, borders
2200 * are dirty
2201 */
2202 redraw();
2203 }
2204 return;
2205 }
2206 break;
2207 case 'k': /* old title set compatibility */
2208 xsettitle(strescseq.args[0]);
2209 return;
2210 case 'P': /* DCS -- Device Control String */
2211 case '_': /* APC -- Application Program Command */
2212 case '^': /* PM -- Privacy Message */
2213 return;
2214 }
2215
2216 fprintf(stderr, "erresc: unknown str ");
2217 strdump();
2218 }
2219
2220 void
2221 strparse(void) {
2222 char *p = strescseq.buf;
2223
2224 strescseq.narg = 0;
2225 strescseq.buf[strescseq.len] = '\0';
2226 while(p && strescseq.narg < STR_ARG_SIZ)
2227 strescseq.args[strescseq.narg++] = strsep(&p, ";");
2228 }
2229
2230 void
2231 strdump(void) {
2232 int i;
2233 uint c;
2234
2235 printf("ESC%c", strescseq.type);
2236 for(i = 0; i < strescseq.len; i++) {
2237 c = strescseq.buf[i] & 0xff;
2238 if(c == '\0') {
2239 return;
2240 } else if(isprint(c)) {
2241 putchar(c);
2242 } else if(c == '\n') {
2243 printf("(\\n)");
2244 } else if(c == '\r') {
2245 printf("(\\r)");
2246 } else if(c == 0x1b) {
2247 printf("(\\e)");
2248 } else {
2249 printf("(%02x)", c);
2250 }
2251 }
2252 printf("ESC\\\n");
2253 }
2254
2255 void
2256 strreset(void) {
2257 memset(&strescseq, 0, sizeof(strescseq));
2258 }
2259
2260 void
2261 tprinter(char *s, size_t len) {
2262 if(iofd != -1 && xwrite(iofd, s, len) < 0) {
2263 fprintf(stderr, "Error writing in %s:%s\n",
2264 opt_io, strerror(errno));
2265 close(iofd);
2266 iofd = -1;
2267 }
2268 }
2269
2270 void
2271 toggleprinter(const Arg *arg) {
2272 term.mode ^= MODE_PRINT;
2273 }
2274
2275 void
2276 printscreen(const Arg *arg) {
2277 tdump();
2278 }
2279
2280 void
2281 printsel(const Arg *arg) {
2282 tdumpsel();
2283 }
2284
2285 void
2286 tdumpsel(void) {
2287 char *ptr;
2288
2289 if((ptr = getsel())) {
2290 tprinter(ptr, strlen(ptr));
2291 free(ptr);
2292 }
2293 }
2294
2295 void
2296 tdumpline(int n) {
2297 Glyph *bp, *end;
2298
2299 bp = &term.line[n][0];
2300 end = &bp[MIN(tlinelen(n), term.col) - 1];
2301 if(bp != end || bp->c[0] != ' ') {
2302 for( ;bp <= end; ++bp)
2303 tprinter(bp->c, utf8len(bp->c));
2304 }
2305 tprinter("\n", 1);
2306 }
2307
2308 void
2309 tdump(void) {
2310 int i;
2311
2312 for(i = 0; i < term.row; ++i)
2313 tdumpline(i);
2314 }
2315
2316 void
2317 tputtab(int n) {
2318 uint x = term.c.x;
2319
2320 if(n > 0) {
2321 while(x < term.col && n--)
2322 for(++x; x < term.col && !term.tabs[x]; ++x)
2323 /* nothing */ ;
2324 } else if(n < 0) {
2325 while(x > 0 && n++)
2326 for(--x; x > 0 && !term.tabs[x]; --x)
2327 /* nothing */ ;
2328 }
2329 tmoveto(x, term.c.y);
2330 }
2331
2332 void
2333 techo(char *buf, int len) {
2334 for(; len > 0; buf++, len--) {
2335 char c = *buf;
2336
2337 if(ISCONTROL((uchar) c)) { /* control code */
2338 if(c & 0x80) {
2339 c &= 0x7f;
2340 tputc("^", 1);
2341 tputc("[", 1);
2342 } else if(c != '\n' && c != '\r' && c != '\t') {
2343 c ^= 0x40;
2344 tputc("^", 1);
2345 }
2346 tputc(&c, 1);
2347 } else {
2348 break;
2349 }
2350 }
2351 if(len)
2352 tputc(buf, len);
2353 }
2354
2355 void
2356 tdeftran(char ascii) {
2357 static char cs[] = "0B";
2358 static int vcs[] = {CS_GRAPHIC0, CS_USA};
2359 char *p;
2360
2361 if((p = strchr(cs, ascii)) == NULL) {
2362 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2363 } else {
2364 term.trantbl[term.icharset] = vcs[p - cs];
2365 }
2366 }
2367
2368 void
2369 tdectest(char c) {
2370 static char E[UTF_SIZ] = "E";
2371 int x, y;
2372
2373 if(c == '8') { /* DEC screen alignment test. */
2374 for(x = 0; x < term.col; ++x) {
2375 for(y = 0; y < term.row; ++y)
2376 tsetchar(E, &term.c.attr, x, y);
2377 }
2378 }
2379 }
2380
2381 void
2382 tstrsequence(uchar c) {
2383 if (c & 0x80) {
2384 switch (c) {
2385 case 0x90: /* DCS -- Device Control String */
2386 c = 'P';
2387 break;
2388 case 0x9f: /* APC -- Application Program Command */
2389 c = '_';
2390 break;
2391 case 0x9e: /* PM -- Privacy Message */
2392 c = '^';
2393 break;
2394 case 0x9d: /* OSC -- Operating System Command */
2395 c = ']';
2396 break;
2397 }
2398 }
2399 strreset();
2400 strescseq.type = c;
2401 term.esc |= ESC_STR;
2402 return;
2403 }
2404
2405 void
2406 tcontrolcode(uchar ascii) {
2407 static char question[UTF_SIZ] = "?";
2408
2409 switch(ascii) {
2410 case '\t': /* HT */
2411 tputtab(1);
2412 return;
2413 case '\b': /* BS */
2414 tmoveto(term.c.x-1, term.c.y);
2415 return;
2416 case '\r': /* CR */
2417 tmoveto(0, term.c.y);
2418 return;
2419 case '\f': /* LF */
2420 case '\v': /* VT */
2421 case '\n': /* LF */
2422 /* go to first col if the mode is set */
2423 tnewline(IS_SET(MODE_CRLF));
2424 return;
2425 case '\a': /* BEL */
2426 if(term.esc & ESC_STR_END) {
2427 /* backwards compatibility to xterm */
2428 strhandle();
2429 } else {
2430 if(!(xw.state & WIN_FOCUSED))
2431 xseturgency(1);
2432 if (bellvolume)
2433 XkbBell(xw.dpy, xw.win, bellvolume, (Atom)NULL);
2434 }
2435 break;
2436 case '\033': /* ESC */
2437 csireset();
2438 term.esc &= ~(ESC_CSI|ESC_ALTCHARSET|ESC_TEST);
2439 term.esc |= ESC_START;
2440 return;
2441 case '\016': /* SO (LS1 -- Locking shift 1) */
2442 case '\017': /* SI (LS0 -- Locking shift 0) */
2443 term.charset = 1 - (ascii - '\016');
2444 return;
2445 case '\032': /* SUB */
2446 tsetchar(question, &term.c.attr, term.c.x, term.c.y);
2447 case '\030': /* CAN */
2448 csireset();
2449 break;
2450 case '\005': /* ENQ (IGNORED) */
2451 case '\000': /* NUL (IGNORED) */
2452 case '\021': /* XON (IGNORED) */
2453 case '\023': /* XOFF (IGNORED) */
2454 case 0177: /* DEL (IGNORED) */
2455 return;
2456 case 0x84: /* TODO: IND */
2457 break;
2458 case 0x85: /* NEL -- Next line */
2459 tnewline(1); /* always go to first col */
2460 break;
2461 case 0x88: /* HTS -- Horizontal tab stop */
2462 term.tabs[term.c.x] = 1;
2463 break;
2464 case 0x8d: /* TODO: RI */
2465 case 0x8e: /* TODO: SS2 */
2466 case 0x8f: /* TODO: SS3 */
2467 case 0x98: /* TODO: SOS */
2468 break;
2469 case 0x9a: /* DECID -- Identify Terminal */
2470 ttywrite(vtiden, sizeof(vtiden) - 1);
2471 break;
2472 case 0x9b: /* TODO: CSI */
2473 case 0x9c: /* TODO: ST */
2474 break;
2475 case 0x90: /* DCS -- Device Control String */
2476 case 0x9f: /* APC -- Application Program Command */
2477 case 0x9e: /* PM -- Privacy Message */
2478 case 0x9d: /* OSC -- Operating System Command */
2479 tstrsequence(ascii);
2480 return;
2481 }
2482 /* only CAN, SUB, \a and C1 chars interrupt a sequence */
2483 term.esc &= ~(ESC_STR_END|ESC_STR);
2484 return;
2485 }
2486
2487 /*
2488 * returns 1 when the sequence is finished and it hasn't to read
2489 * more characters for this sequence, otherwise 0
2490 */
2491 int
2492 eschandle(uchar ascii) {
2493 switch(ascii) {
2494 case '[':
2495 term.esc |= ESC_CSI;
2496 return 0;
2497 case '#':
2498 term.esc |= ESC_TEST;
2499 return 0;
2500 case 'P': /* DCS -- Device Control String */
2501 case '_': /* APC -- Application Program Command */
2502 case '^': /* PM -- Privacy Message */
2503 case ']': /* OSC -- Operating System Command */
2504 case 'k': /* old title set compatibility */
2505 tstrsequence(ascii);
2506 return 0;
2507 case 'n': /* LS2 -- Locking shift 2 */
2508 case 'o': /* LS3 -- Locking shift 3 */
2509 term.charset = 2 + (ascii - 'n');
2510 break;
2511 case '(': /* GZD4 -- set primary charset G0 */
2512 case ')': /* G1D4 -- set secondary charset G1 */
2513 case '*': /* G2D4 -- set tertiary charset G2 */
2514 case '+': /* G3D4 -- set quaternary charset G3 */
2515 term.icharset = ascii - '(';
2516 term.esc |= ESC_ALTCHARSET;
2517 return 0;
2518 case 'D': /* IND -- Linefeed */
2519 if(term.c.y == term.bot) {
2520 tscrollup(term.top, 1);
2521 } else {
2522 tmoveto(term.c.x, term.c.y+1);
2523 }
2524 break;
2525 case 'E': /* NEL -- Next line */
2526 tnewline(1); /* always go to first col */
2527 break;
2528 case 'H': /* HTS -- Horizontal tab stop */
2529 term.tabs[term.c.x] = 1;
2530 break;
2531 case 'M': /* RI -- Reverse index */
2532 if(term.c.y == term.top) {
2533 tscrolldown(term.top, 1);
2534 } else {
2535 tmoveto(term.c.x, term.c.y-1);
2536 }
2537 break;
2538 case 'Z': /* DECID -- Identify Terminal */
2539 ttywrite(vtiden, sizeof(vtiden) - 1);
2540 break;
2541 case 'c': /* RIS -- Reset to inital state */
2542 treset();
2543 xresettitle();
2544 xloadcols();
2545 break;
2546 case '=': /* DECPAM -- Application keypad */
2547 term.mode |= MODE_APPKEYPAD;
2548 break;
2549 case '>': /* DECPNM -- Normal keypad */
2550 term.mode &= ~MODE_APPKEYPAD;
2551 break;
2552 case '7': /* DECSC -- Save Cursor */
2553 tcursor(CURSOR_SAVE);
2554 break;
2555 case '8': /* DECRC -- Restore Cursor */
2556 tcursor(CURSOR_LOAD);
2557 break;
2558 case '\\': /* ST -- String Terminator */
2559 if(term.esc & ESC_STR_END)
2560 strhandle();
2561 break;
2562 default:
2563 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2564 (uchar) ascii, isprint(ascii)? ascii:'.');
2565 break;
2566 }
2567 return 1;
2568 }
2569
2570 void
2571 tputc(char *c, int len) {
2572 uchar ascii;
2573 bool control;
2574 long unicodep;
2575 int width;
2576 Glyph *gp;
2577
2578 if(len == 1) {
2579 width = 1;
2580 unicodep = ascii = *c;
2581 } else {
2582 utf8decode(c, &unicodep, UTF_SIZ);
2583 if ((width = wcwidth(unicodep)) == -1) {
2584 c = "\357\277\275"; /* UTF_INVALID */
2585 width = 1;
2586 }
2587 control = ISCONTROLC1(unicodep);
2588 ascii = unicodep;
2589 }
2590
2591 if(IS_SET(MODE_PRINT))
2592 tprinter(c, len);
2593 control = ISCONTROL(unicodep);
2594
2595 /*
2596 * STR sequence must be checked before anything else
2597 * because it uses all following characters until it
2598 * receives a ESC, a SUB, a ST or any other C1 control
2599 * character.
2600 */
2601 if(term.esc & ESC_STR) {
2602 if(width == 1 &&
2603 (ascii == '\a' || ascii == 030 ||
2604 ascii == 032 || ascii == 033 ||
2605 ISCONTROLC1(unicodep))) {
2606 term.esc &= ~(ESC_START|ESC_STR);
2607 term.esc |= ESC_STR_END;
2608 } else if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2609 memmove(&strescseq.buf[strescseq.len], c, len);
2610 strescseq.len += len;
2611 return;
2612 } else {
2613 /*
2614 * Here is a bug in terminals. If the user never sends
2615 * some code to stop the str or esc command, then st
2616 * will stop responding. But this is better than
2617 * silently failing with unknown characters. At least
2618 * then users will report back.
2619 *
2620 * In the case users ever get fixed, here is the code:
2621 */
2622 /*
2623 * term.esc = 0;
2624 * strhandle();
2625 */
2626 return;
2627 }
2628 }
2629
2630 /*
2631 * Actions of control codes must be performed as soon they arrive
2632 * because they can be embedded inside a control sequence, and
2633 * they must not cause conflicts with sequences.
2634 */
2635 if(control) {
2636 tcontrolcode(ascii);
2637 /*
2638 * control codes are not shown ever
2639 */
2640 return;
2641 } else if(term.esc & ESC_START) {
2642 if(term.esc & ESC_CSI) {
2643 csiescseq.buf[csiescseq.len++] = ascii;
2644 if(BETWEEN(ascii, 0x40, 0x7E)
2645 || csiescseq.len >= \
2646 sizeof(csiescseq.buf)-1) {
2647 term.esc = 0;
2648 csiparse();
2649 csihandle();
2650 }
2651 return;
2652 } else if(term.esc & ESC_ALTCHARSET) {
2653 tdeftran(ascii);
2654 } else if(term.esc & ESC_TEST) {
2655 tdectest(ascii);
2656 } else {
2657 if (!eschandle(ascii))
2658 return;
2659 /* sequence already finished */
2660 }
2661 term.esc = 0;
2662 /*
2663 * All characters which form part of a sequence are not
2664 * printed
2665 */
2666 return;
2667 }
2668 if(sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
2669 selclear(NULL);
2670
2671 gp = &term.line[term.c.y][term.c.x];
2672 if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2673 gp->mode |= ATTR_WRAP;
2674 tnewline(1);
2675 gp = &term.line[term.c.y][term.c.x];
2676 }
2677
2678 if(IS_SET(MODE_INSERT) && term.c.x+width < term.col)
2679 memmove(gp+width, gp, (term.col - term.c.x - width) * sizeof(Glyph));
2680
2681 if(term.c.x+width > term.col) {
2682 tnewline(1);
2683 gp = &term.line[term.c.y][term.c.x];
2684 }
2685
2686 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2687
2688 if(width == 2) {
2689 gp->mode |= ATTR_WIDE;
2690 if(term.c.x+1 < term.col) {
2691 gp[1].c[0] = '\0';
2692 gp[1].mode = ATTR_WDUMMY;
2693 }
2694 }
2695 if(term.c.x+width < term.col) {
2696 tmoveto(term.c.x+width, term.c.y);
2697 } else {
2698 term.c.state |= CURSOR_WRAPNEXT;
2699 }
2700 }
2701
2702 void
2703 tresize(int col, int row) {
2704 int i;
2705 int minrow = MIN(row, term.row);
2706 int mincol = MIN(col, term.col);
2707 int slide = term.c.y - row + 1;
2708 bool *bp;
2709 TCursor c;
2710
2711 if(col < 1 || row < 1) {
2712 fprintf(stderr,
2713 "tresize: error resizing to %dx%d\n", col, row);
2714 return;
2715 }
2716
2717 /* free unneeded rows */
2718 i = 0;
2719 if(slide > 0) {
2720 /*
2721 * slide screen to keep cursor where we expect it -
2722 * tscrollup would work here, but we can optimize to
2723 * memmove because we're freeing the earlier lines
2724 */
2725 for(/* i = 0 */; i < slide; i++) {
2726 free(term.line[i]);
2727 free(term.alt[i]);
2728 }
2729 memmove(term.line, term.line + slide, row * sizeof(Line));
2730 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2731 }
2732 for(i += row; i < term.row; i++) {
2733 free(term.line[i]);
2734 free(term.alt[i]);
2735 }
2736
2737 /* resize to new height */
2738 term.line = xrealloc(term.line, row * sizeof(Line));
2739 term.alt = xrealloc(term.alt, row * sizeof(Line));
2740 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2741 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2742
2743 /* resize each row to new width, zero-pad if needed */
2744 for(i = 0; i < minrow; i++) {
2745 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2746 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2747 }
2748
2749 /* allocate any new rows */
2750 for(/* i == minrow */; i < row; i++) {
2751 term.line[i] = xmalloc(col * sizeof(Glyph));
2752 term.alt[i] = xmalloc(col * sizeof(Glyph));
2753 }
2754 if(col > term.col) {
2755 bp = term.tabs + term.col;
2756
2757 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2758 while(--bp > term.tabs && !*bp)
2759 /* nothing */ ;
2760 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2761 *bp = 1;
2762 }
2763 /* update terminal size */
2764 term.col = col;
2765 term.row = row;
2766 /* reset scrolling region */
2767 tsetscroll(0, row-1);
2768 /* make use of the LIMIT in tmoveto */
2769 tmoveto(term.c.x, term.c.y);
2770 /* Clearing both screens (it makes dirty all lines) */
2771 c = term.c;
2772 for(i = 0; i < 2; i++) {
2773 if(mincol < col && 0 < minrow) {
2774 tclearregion(mincol, 0, col - 1, minrow - 1);
2775 }
2776 if(0 < col && minrow < row) {
2777 tclearregion(0, minrow, col - 1, row - 1);
2778 }
2779 tswapscreen();
2780 tcursor(CURSOR_LOAD);
2781 }
2782 term.c = c;
2783 }
2784
2785 void
2786 xresize(int col, int row) {
2787 xw.tw = MAX(1, col * xw.cw);
2788 xw.th = MAX(1, row * xw.ch);
2789
2790 XFreePixmap(xw.dpy, xw.buf);
2791 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2792 DefaultDepth(xw.dpy, xw.scr));
2793 XftDrawChange(xw.draw, xw.buf);
2794 xclear(0, 0, xw.w, xw.h);
2795 }
2796
2797 static inline ushort
2798 sixd_to_16bit(int x) {
2799 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2800 }
2801
2802 void
2803 xloadcols(void) {
2804 int i;
2805 XRenderColor color = { .alpha = 0xffff };
2806 static bool loaded;
2807 Color *cp;
2808
2809 if(loaded) {
2810 for (cp = dc.col; cp < dc.col + LEN(dc.col); ++cp)
2811 XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
2812 }
2813
2814 /* load colors [0-15] and [256-LEN(colorname)] (config.h) */
2815 for(i = 0; i < LEN(colorname); i++) {
2816 if(!colorname[i])
2817 continue;
2818 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2819 die("Could not allocate color '%s'\n", colorname[i]);
2820 }
2821 }
2822
2823 /* load colors [16-231] ; same colors as xterm */
2824 for(i = 16; i < 6*6*6+16; i++) {
2825 color.red = sixd_to_16bit( ((i-16)/36)%6 );
2826 color.green = sixd_to_16bit( ((i-16)/6) %6 );
2827 color.blue = sixd_to_16bit( ((i-16)/1) %6 );
2828 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i]))
2829 die("Could not allocate color %d\n", i);
2830 }
2831
2832 /* load colors [232-255] ; grayscale */
2833 for(; i < 256; i++) {
2834 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (i-(6*6*6+16));
2835 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i]))
2836 die("Could not allocate color %d\n", i);
2837 }
2838 loaded = true;
2839 }
2840
2841 int
2842 xsetcolorname(int x, const char *name) {
2843 XRenderColor color = { .alpha = 0xffff };
2844 Color ncolor;
2845
2846 if(!BETWEEN(x, 0, LEN(colorname)))
2847 return 1;
2848
2849 if(!name) {
2850 if(BETWEEN(x, 16, 16 + 215)) { /* 256 color */
2851 color.red = sixd_to_16bit( ((x-16)/36)%6 );
2852 color.green = sixd_to_16bit( ((x-16)/6) %6 );
2853 color.blue = sixd_to_16bit( ((x-16)/1) %6 );
2854 if(!XftColorAllocValue(xw.dpy, xw.vis,
2855 xw.cmap, &color, &ncolor)) {
2856 return 1;
2857 }
2858
2859 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2860 dc.col[x] = ncolor;
2861 return 0;
2862 } else if(BETWEEN(x, 16 + 216, 255)) { /* greyscale */
2863 color.red = color.green = color.blue = \
2864 0x0808 + 0x0a0a * (x - (16 + 216));
2865 if(!XftColorAllocValue(xw.dpy, xw.vis,
2866 xw.cmap, &color, &ncolor)) {
2867 return 1;
2868 }
2869
2870 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2871 dc.col[x] = ncolor;
2872 return 0;
2873 } else { /* system colors */
2874 name = colorname[x];
2875 }
2876 }
2877 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &ncolor))
2878 return 1;
2879
2880 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2881 dc.col[x] = ncolor;
2882 return 0;
2883 }
2884
2885 void
2886 xtermclear(int col1, int row1, int col2, int row2) {
2887 XftDrawRect(xw.draw,
2888 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2889 borderpx + col1 * xw.cw,
2890 borderpx + row1 * xw.ch,
2891 (col2-col1+1) * xw.cw,
2892 (row2-row1+1) * xw.ch);
2893 }
2894
2895 /*
2896 * Absolute coordinates.
2897 */
2898 void
2899 xclear(int x1, int y1, int x2, int y2) {
2900 XftDrawRect(xw.draw,
2901 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2902 x1, y1, x2-x1, y2-y1);
2903 }
2904
2905 void
2906 xhints(void) {
2907 XClassHint class = {opt_class ? opt_class : termname, termname};
2908 XWMHints wm = {.flags = InputHint, .input = 1};
2909 XSizeHints *sizeh = NULL;
2910
2911 sizeh = XAllocSizeHints();
2912
2913 sizeh->flags = PSize | PResizeInc | PBaseSize;
2914 sizeh->height = xw.h;
2915 sizeh->width = xw.w;
2916 sizeh->height_inc = xw.ch;
2917 sizeh->width_inc = xw.cw;
2918 sizeh->base_height = 2 * borderpx;
2919 sizeh->base_width = 2 * borderpx;
2920 if(xw.isfixed == True) {
2921 sizeh->flags |= PMaxSize | PMinSize;
2922 sizeh->min_width = sizeh->max_width = xw.w;
2923 sizeh->min_height = sizeh->max_height = xw.h;
2924 }
2925 if(xw.gm & (XValue|YValue)) {
2926 sizeh->flags |= USPosition | PWinGravity;
2927 sizeh->x = xw.l;
2928 sizeh->y = xw.t;
2929 sizeh->win_gravity = xgeommasktogravity(xw.gm);
2930 }
2931
2932 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
2933 &class);
2934 XFree(sizeh);
2935 }
2936
2937 int
2938 xgeommasktogravity(int mask) {
2939 switch(mask & (XNegative|YNegative)) {
2940 case 0:
2941 return NorthWestGravity;
2942 case XNegative:
2943 return NorthEastGravity;
2944 case YNegative:
2945 return SouthWestGravity;
2946 }
2947 return SouthEastGravity;
2948 }
2949
2950 int
2951 xloadfont(Font *f, FcPattern *pattern) {
2952 FcPattern *match;
2953 FcResult result;
2954
2955 match = FcFontMatch(NULL, pattern, &result);
2956 if(!match)
2957 return 1;
2958
2959 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2960 FcPatternDestroy(match);
2961 return 1;
2962 }
2963
2964 f->set = NULL;
2965 f->pattern = FcPatternDuplicate(pattern);
2966
2967 f->ascent = f->match->ascent;
2968 f->descent = f->match->descent;
2969 f->lbearing = 0;
2970 f->rbearing = f->match->max_advance_width;
2971
2972 f->height = f->ascent + f->descent;
2973 f->width = f->lbearing + f->rbearing;
2974
2975 return 0;
2976 }
2977
2978 void
2979 xloadfonts(char *fontstr, double fontsize) {
2980 FcPattern *pattern;
2981 FcResult r_sz, r_psz;
2982 double fontval;
2983 float ceilf(float);
2984
2985 if(fontstr[0] == '-') {
2986 pattern = XftXlfdParse(fontstr, False, False);
2987 } else {
2988 pattern = FcNameParse((FcChar8 *)fontstr);
2989 }
2990
2991 if(!pattern)
2992 die("st: can't open font %s\n", fontstr);
2993
2994 if(fontsize > 1) {
2995 FcPatternDel(pattern, FC_PIXEL_SIZE);
2996 FcPatternDel(pattern, FC_SIZE);
2997 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2998 usedfontsize = fontsize;
2999 } else {
3000 r_psz = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
3001 r_sz = FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval);
3002 if(r_psz == FcResultMatch) {
3003 usedfontsize = fontval;
3004 } else if(r_sz == FcResultMatch) {
3005 usedfontsize = -1;
3006 } else {
3007 /*
3008 * Default font size is 12, if none given. This is to
3009 * have a known usedfontsize value.
3010 */
3011 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
3012 usedfontsize = 12;
3013 }
3014 defaultfontsize = usedfontsize;
3015 }
3016
3017 FcConfigSubstitute(0, pattern, FcMatchPattern);
3018 FcDefaultSubstitute(pattern);
3019
3020 if(xloadfont(&dc.font, pattern))
3021 die("st: can't open font %s\n", fontstr);
3022
3023 if(usedfontsize < 0) {
3024 FcPatternGetDouble(dc.font.match->pattern,
3025 FC_PIXEL_SIZE, 0, &fontval);
3026 usedfontsize = fontval;
3027 if(fontsize == 0)
3028 defaultfontsize = fontval;
3029 }
3030
3031 /* Setting character width and height. */
3032 xw.cw = ceilf(dc.font.width * cwscale);
3033 xw.ch = ceilf(dc.font.height * chscale);
3034
3035 FcPatternDel(pattern, FC_SLANT);
3036 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
3037 if(xloadfont(&dc.ifont, pattern))
3038 die("st: can't open font %s\n", fontstr);
3039
3040 FcPatternDel(pattern, FC_WEIGHT);
3041 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
3042 if(xloadfont(&dc.ibfont, pattern))
3043 die("st: can't open font %s\n", fontstr);
3044
3045 FcPatternDel(pattern, FC_SLANT);
3046 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
3047 if(xloadfont(&dc.bfont, pattern))
3048 die("st: can't open font %s\n", fontstr);
3049
3050 FcPatternDestroy(pattern);
3051 }
3052
3053 int
3054 xloadfontset(Font *f) {
3055 FcResult result;
3056
3057 if(!(f->set = FcFontSort(0, f->pattern, FcTrue, 0, &result)))
3058 return 1;
3059 return 0;
3060 }
3061
3062 void
3063 xunloadfont(Font *f) {
3064 XftFontClose(xw.dpy, f->match);
3065 FcPatternDestroy(f->pattern);
3066 if(f->set)
3067 FcFontSetDestroy(f->set);
3068 }
3069
3070 void
3071 xunloadfonts(void) {
3072 /* Free the loaded fonts in the font cache. */
3073 while(frclen > 0)
3074 XftFontClose(xw.dpy, frc[--frclen].font);
3075
3076 xunloadfont(&dc.font);
3077 xunloadfont(&dc.bfont);
3078 xunloadfont(&dc.ifont);
3079 xunloadfont(&dc.ibfont);
3080 }
3081
3082 void
3083 xzoom(const Arg *arg) {
3084 Arg larg;
3085
3086 larg.i = usedfontsize + arg->i;
3087 xzoomabs(&larg);
3088 }
3089
3090 void
3091 xzoomabs(const Arg *arg) {
3092 xunloadfonts();
3093 xloadfonts(usedfont, arg->i);
3094 cresize(0, 0);
3095 redraw();
3096 xhints();
3097 }
3098
3099 void
3100 xzoomreset(const Arg *arg) {
3101 Arg larg;
3102
3103 if(defaultfontsize > 0) {
3104 larg.i = defaultfontsize;
3105 xzoomabs(&larg);
3106 }
3107 }
3108
3109 void
3110 xinit(void) {
3111 XGCValues gcvalues;
3112 Cursor cursor;
3113 Window parent;
3114 pid_t thispid = getpid();
3115
3116 if(!(xw.dpy = XOpenDisplay(NULL)))
3117 die("Can't open display\n");
3118 xw.scr = XDefaultScreen(xw.dpy);
3119 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
3120
3121 /* font */
3122 if(!FcInit())
3123 die("Could not init fontconfig.\n");
3124
3125 usedfont = (opt_font == NULL)? font : opt_font;
3126 xloadfonts(usedfont, 0);
3127
3128 /* colors */
3129 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
3130 xloadcols();
3131
3132 /* adjust fixed window geometry */
3133 xw.w = 2 * borderpx + term.col * xw.cw;
3134 xw.h = 2 * borderpx + term.row * xw.ch;
3135 if(xw.gm & XNegative)
3136 xw.l += DisplayWidth(xw.dpy, xw.scr) - xw.w - 2;
3137 if(xw.gm & YNegative)
3138 xw.t += DisplayWidth(xw.dpy, xw.scr) - xw.h - 2;
3139
3140 /* Events */
3141 xw.attrs.background_pixel = dc.col[defaultbg].pixel;
3142 xw.attrs.border_pixel = dc.col[defaultbg].pixel;
3143 xw.attrs.bit_gravity = NorthWestGravity;
3144 xw.attrs.event_mask = FocusChangeMask | KeyPressMask
3145 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
3146 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
3147 xw.attrs.colormap = xw.cmap;
3148
3149 if (!(opt_embed && (parent = strtol(opt_embed, NULL, 0))))
3150 parent = XRootWindow(xw.dpy, xw.scr);
3151 xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
3152 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
3153 xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
3154 | CWEventMask | CWColormap, &xw.attrs);
3155
3156 memset(&gcvalues, 0, sizeof(gcvalues));
3157 gcvalues.graphics_exposures = False;
3158 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
3159 &gcvalues);
3160 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
3161 DefaultDepth(xw.dpy, xw.scr));
3162 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
3163 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
3164
3165 /* Xft rendering context */
3166 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
3167
3168 /* input methods */
3169 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3170 XSetLocaleModifiers("@im=local");
3171 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3172 XSetLocaleModifiers("@im=");
3173 if((xw.xim = XOpenIM(xw.dpy,
3174 NULL, NULL, NULL)) == NULL) {
3175 die("XOpenIM failed. Could not open input"
3176 " device.\n");
3177 }
3178 }
3179 }
3180 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
3181 | XIMStatusNothing, XNClientWindow, xw.win,
3182 XNFocusWindow, xw.win, NULL);
3183 if(xw.xic == NULL)
3184 die("XCreateIC failed. Could not obtain input method.\n");
3185
3186 /* white cursor, black outline */
3187 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
3188 XDefineCursor(xw.dpy, xw.win, cursor);
3189 XRecolorCursor(xw.dpy, cursor,
3190 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
3191 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
3192
3193 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
3194 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
3195 xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
3196 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
3197
3198 xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
3199 XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
3200 PropModeReplace, (uchar *)&thispid, 1);
3201
3202 xresettitle();
3203 XMapWindow(xw.dpy, xw.win);
3204 xhints();
3205 XSync(xw.dpy, False);
3206 }
3207
3208 void
3209 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
3210 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
3211 width = charlen * xw.cw, xp, i;
3212 int frcflags, charexists;
3213 int u8fl, u8fblen, u8cblen, doesexist;
3214 char *u8c, *u8fs;
3215 long unicodep;
3216 Font *font = &dc.font;
3217 FcResult fcres;
3218 FcPattern *fcpattern, *fontpattern;
3219 FcFontSet *fcsets[] = { NULL };
3220 FcCharSet *fccharset;
3221 Color *fg, *bg, *temp, revfg, revbg, truefg, truebg;
3222 XRenderColor colfg, colbg;
3223 XRectangle r;
3224 int oneatatime;
3225
3226 frcflags = FRC_NORMAL;
3227
3228 if(base.mode & ATTR_ITALIC) {
3229 if(base.fg == defaultfg)
3230 base.fg = defaultitalic;
3231 font = &dc.ifont;
3232 frcflags = FRC_ITALIC;
3233 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
3234 if(base.fg == defaultfg)
3235 base.fg = defaultitalic;
3236 font = &dc.ibfont;
3237 frcflags = FRC_ITALICBOLD;
3238 } else if(base.mode & ATTR_UNDERLINE) {
3239 if(base.fg == defaultfg)
3240 base.fg = defaultunderline;
3241 }
3242
3243 if(IS_TRUECOL(base.fg)) {
3244 colfg.alpha = 0xffff;
3245 colfg.red = TRUERED(base.fg);
3246 colfg.green = TRUEGREEN(base.fg);
3247 colfg.blue = TRUEBLUE(base.fg);
3248 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
3249 fg = &truefg;
3250 } else {
3251 fg = &dc.col[base.fg];
3252 }
3253
3254 if(IS_TRUECOL(base.bg)) {
3255 colbg.alpha = 0xffff;
3256 colbg.green = TRUEGREEN(base.bg);
3257 colbg.red = TRUERED(base.bg);
3258 colbg.blue = TRUEBLUE(base.bg);
3259 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
3260 bg = &truebg;
3261 } else {
3262 bg = &dc.col[base.bg];
3263 }
3264
3265 if(base.mode & ATTR_BOLD) {
3266 /*
3267 * change basic system colors [0-7]
3268 * to bright system colors [8-15]
3269 */
3270 if(BETWEEN(base.fg, 0, 7) && !(base.mode & ATTR_FAINT))
3271 fg = &dc.col[base.fg + 8];
3272
3273 if(base.mode & ATTR_ITALIC) {
3274 font = &dc.ibfont;
3275 frcflags = FRC_ITALICBOLD;
3276 } else {
3277 font = &dc.bfont;
3278 frcflags = FRC_BOLD;
3279 }
3280 }
3281
3282 if(IS_SET(MODE_REVERSE)) {
3283 if(fg == &dc.col[defaultfg]) {
3284 fg = &dc.col[defaultbg];
3285 } else {
3286 colfg.red = ~fg->color.red;
3287 colfg.green = ~fg->color.green;
3288 colfg.blue = ~fg->color.blue;
3289 colfg.alpha = fg->color.alpha;
3290 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
3291 &revfg);
3292 fg = &revfg;
3293 }
3294
3295 if(bg == &dc.col[defaultbg]) {
3296 bg = &dc.col[defaultfg];
3297 } else {
3298 colbg.red = ~bg->color.red;
3299 colbg.green = ~bg->color.green;
3300 colbg.blue = ~bg->color.blue;
3301 colbg.alpha = bg->color.alpha;
3302 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
3303 &revbg);
3304 bg = &revbg;
3305 }
3306 }
3307
3308 if(base.mode & ATTR_REVERSE) {
3309 temp = fg;
3310 fg = bg;
3311 bg = temp;
3312 }
3313
3314 if(base.mode & ATTR_FAINT && !(base.mode & ATTR_BOLD)) {
3315 colfg.red = fg->color.red / 2;
3316 colfg.green = fg->color.green / 2;
3317 colfg.blue = fg->color.blue / 2;
3318 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
3319 fg = &revfg;
3320 }
3321
3322 if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
3323 fg = bg;
3324
3325 if(base.mode & ATTR_INVISIBLE)
3326 fg = bg;
3327
3328 /* Intelligent cleaning up of the borders. */
3329 if(x == 0) {
3330 xclear(0, (y == 0)? 0 : winy, borderpx,
3331 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
3332 }
3333 if(x + charlen >= term.col) {
3334 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
3335 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
3336 }
3337 if(y == 0)
3338 xclear(winx, 0, winx + width, borderpx);
3339 if(y == term.row-1)
3340 xclear(winx, winy + xw.ch, winx + width, xw.h);
3341
3342 /* Clean up the region we want to draw to. */
3343 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
3344
3345 /* Set the clip region because Xft is sometimes dirty. */
3346 r.x = 0;
3347 r.y = 0;
3348 r.height = xw.ch;
3349 r.width = width;
3350 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
3351
3352 for(xp = winx; bytelen > 0;) {
3353 /*
3354 * Search for the range in the to be printed string of glyphs
3355 * that are in the main font. Then print that range. If
3356 * some glyph is found that is not in the font, do the
3357 * fallback dance.
3358 */
3359 u8fs = s;
3360 u8fblen = 0;
3361 u8fl = 0;
3362 oneatatime = font->width != xw.cw;
3363 for(;;) {
3364 u8c = s;
3365 u8cblen = utf8decode(s, &unicodep, UTF_SIZ);
3366 s += u8cblen;
3367 bytelen -= u8cblen;
3368
3369 doesexist = XftCharExists(xw.dpy, font->match, unicodep);
3370 if(doesexist) {
3371 u8fl++;
3372 u8fblen += u8cblen;
3373 if(!oneatatime && bytelen > 0)
3374 continue;
3375 }
3376
3377 if(u8fl > 0) {
3378 XftDrawStringUtf8(xw.draw, fg,
3379 font->match, xp,
3380 winy + font->ascent,
3381 (FcChar8 *)u8fs,
3382 u8fblen);
3383 xp += xw.cw * u8fl;
3384 }
3385 break;
3386 }
3387 if(doesexist) {
3388 if(oneatatime)
3389 continue;
3390 break;
3391 }
3392
3393 /* Search the font cache. */
3394 for(i = 0; i < frclen; i++) {
3395 charexists = XftCharExists(xw.dpy, frc[i].font, unicodep);
3396 /* Everything correct. */
3397 if(charexists && frc[i].flags == frcflags)
3398 break;
3399 /* We got a default font for a not found glyph. */
3400 if(!charexists && frc[i].flags == frcflags \
3401 && unicodep == unicodep) {
3402 break;
3403 }
3404 }
3405
3406 /* Nothing was found. */
3407 if(i >= frclen) {
3408 if(!font->set)
3409 xloadfontset(font);
3410 fcsets[0] = font->set;
3411
3412 /*
3413 * Nothing was found in the cache. Now use
3414 * some dozen of Fontconfig calls to get the
3415 * font for one single character.
3416 *
3417 * Xft and fontconfig are design failures.
3418 */
3419 fcpattern = FcPatternDuplicate(font->pattern);
3420 fccharset = FcCharSetCreate();
3421
3422 FcCharSetAddChar(fccharset, unicodep);
3423 FcPatternAddCharSet(fcpattern, FC_CHARSET,
3424 fccharset);
3425 FcPatternAddBool(fcpattern, FC_SCALABLE,
3426 FcTrue);
3427
3428 FcConfigSubstitute(0, fcpattern,
3429 FcMatchPattern);
3430 FcPatternPrint(fcpattern);
3431 FcDefaultSubstitute(fcpattern);
3432
3433 fontpattern = FcFontSetMatch(0, fcsets, 1,
3434 fcpattern, &fcres);
3435
3436 /*
3437 * Overwrite or create the new cache entry.
3438 */
3439 if(frclen >= LEN(frc)) {
3440 frclen = LEN(frc) - 1;
3441 XftFontClose(xw.dpy, frc[frclen].font);
3442 frc[frclen].unicodep = 0;
3443 }
3444
3445 frc[frclen].font = XftFontOpenPattern(xw.dpy,
3446 fontpattern);
3447 frc[frclen].flags = frcflags;
3448 frc[frclen].unicodep = unicodep;
3449
3450 i = frclen;
3451 frclen++;
3452
3453 FcPatternDestroy(fcpattern);
3454 FcCharSetDestroy(fccharset);
3455 }
3456
3457 XftDrawStringUtf8(xw.draw, fg, frc[i].font,
3458 xp, winy + frc[i].font->ascent,
3459 (FcChar8 *)u8c, u8cblen);
3460
3461 xp += xw.cw * wcwidth(unicodep);
3462 }
3463
3464 /*
3465 * This is how the loop above actually should be. Why does the
3466 * application have to care about font details?
3467 *
3468 * I have to repeat: Xft and Fontconfig are design failures.
3469 */
3470 /*
3471 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
3472 winy + font->ascent, (FcChar8 *)s, bytelen);
3473 */
3474
3475 if(base.mode & ATTR_UNDERLINE) {
3476 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
3477 width, 1);
3478 }
3479
3480 if(base.mode & ATTR_STRUCK) {
3481 XftDrawRect(xw.draw, fg, winx, winy + 2 * font->ascent / 3,
3482 width, 1);
3483 }
3484
3485 /* Reset clip to none. */
3486 XftDrawSetClip(xw.draw, 0);
3487 }
3488
3489 void
3490 xdrawcursor(void) {
3491 static int oldx = 0, oldy = 0;
3492 int sl, width, curx;
3493 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
3494
3495 LIMIT(oldx, 0, term.col-1);
3496 LIMIT(oldy, 0, term.row-1);
3497
3498 curx = term.c.x;
3499
3500 /* adjust position if in dummy */
3501 if(term.line[oldy][oldx].mode & ATTR_WDUMMY)
3502 oldx--;
3503 if(term.line[term.c.y][curx].mode & ATTR_WDUMMY)
3504 curx--;
3505
3506 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
3507
3508 /* remove the old cursor */
3509 sl = utf8len(term.line[oldy][oldx].c);
3510 width = (term.line[oldy][oldx].mode & ATTR_WIDE)? 2 : 1;
3511 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
3512 oldy, width, sl);
3513
3514 if(IS_SET(MODE_HIDE))
3515 return;
3516
3517 /* draw the new one */
3518 if(xw.state & WIN_FOCUSED) {
3519 if(IS_SET(MODE_REVERSE)) {
3520 g.mode |= ATTR_REVERSE;
3521 g.fg = defaultcs;
3522 g.bg = defaultfg;
3523 }
3524
3525 sl = utf8len(g.c);
3526 width = (term.line[term.c.y][curx].mode & ATTR_WIDE)\
3527 ? 2 : 1;
3528 xdraws(g.c, g, term.c.x, term.c.y, width, sl);
3529 } else {
3530 XftDrawRect(xw.draw, &dc.col[defaultcs],
3531 borderpx + curx * xw.cw,
3532 borderpx + term.c.y * xw.ch,
3533 xw.cw - 1, 1);
3534 XftDrawRect(xw.draw, &dc.col[defaultcs],
3535 borderpx + curx * xw.cw,
3536 borderpx + term.c.y * xw.ch,
3537 1, xw.ch - 1);
3538 XftDrawRect(xw.draw, &dc.col[defaultcs],
3539 borderpx + (curx + 1) * xw.cw - 1,
3540 borderpx + term.c.y * xw.ch,
3541 1, xw.ch - 1);
3542 XftDrawRect(xw.draw, &dc.col[defaultcs],
3543 borderpx + curx * xw.cw,
3544 borderpx + (term.c.y + 1) * xw.ch - 1,
3545 xw.cw, 1);
3546 }
3547 oldx = curx, oldy = term.c.y;
3548 }
3549
3550
3551 void
3552 xsettitle(char *p) {
3553 XTextProperty prop;
3554
3555 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3556 &prop);
3557 XSetWMName(xw.dpy, xw.win, &prop);
3558 XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
3559 XFree(prop.value);
3560 }
3561
3562 void
3563 xresettitle(void) {
3564 xsettitle(opt_title ? opt_title : "st");
3565 }
3566
3567 void
3568 redraw(void) {
3569 tfulldirt();
3570 draw();
3571 }
3572
3573 void
3574 draw(void) {
3575 drawregion(0, 0, term.col, term.row);
3576 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3577 xw.h, 0, 0);
3578 XSetForeground(xw.dpy, dc.gc,
3579 dc.col[IS_SET(MODE_REVERSE)?
3580 defaultfg : defaultbg].pixel);
3581 }
3582
3583 void
3584 drawregion(int x1, int y1, int x2, int y2) {
3585 int ic, ib, x, y, ox, sl;
3586 Glyph base, new;
3587 char buf[DRAW_BUF_SIZ];
3588 bool ena_sel = sel.ob.x != -1 && sel.alt == IS_SET(MODE_ALTSCREEN);
3589 long unicodep;
3590
3591 if(!(xw.state & WIN_VISIBLE))
3592 return;
3593
3594 for(y = y1; y < y2; y++) {
3595 if(!term.dirty[y])
3596 continue;
3597
3598 xtermclear(0, y, term.col, y);
3599 term.dirty[y] = 0;
3600 base = term.line[y][0];
3601 ic = ib = ox = 0;
3602 for(x = x1; x < x2; x++) {
3603 new = term.line[y][x];
3604 if(new.mode == ATTR_WDUMMY)
3605 continue;
3606 if(ena_sel && selected(x, y))
3607 new.mode ^= ATTR_REVERSE;
3608 if(ib > 0 && (ATTRCMP(base, new)
3609 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3610 xdraws(buf, base, ox, y, ic, ib);
3611 ic = ib = 0;
3612 }
3613 if(ib == 0) {
3614 ox = x;
3615 base = new;
3616 }
3617
3618 sl = utf8decode(new.c, &unicodep, UTF_SIZ);
3619 memcpy(buf+ib, new.c, sl);
3620 ib += sl;
3621 ic += (new.mode & ATTR_WIDE)? 2 : 1;
3622 }
3623 if(ib > 0)
3624 xdraws(buf, base, ox, y, ic, ib);
3625 }
3626 xdrawcursor();
3627 }
3628
3629 void
3630 expose(XEvent *ev) {
3631 XExposeEvent *e = &ev->xexpose;
3632
3633 if(xw.state & WIN_REDRAW) {
3634 if(!e->count)
3635 xw.state &= ~WIN_REDRAW;
3636 }
3637 redraw();
3638 }
3639
3640 void
3641 visibility(XEvent *ev) {
3642 XVisibilityEvent *e = &ev->xvisibility;
3643
3644 if(e->state == VisibilityFullyObscured) {
3645 xw.state &= ~WIN_VISIBLE;
3646 } else if(!(xw.state & WIN_VISIBLE)) {
3647 /* need a full redraw for next Expose, not just a buf copy */
3648 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3649 }
3650 }
3651
3652 void
3653 unmap(XEvent *ev) {
3654 xw.state &= ~WIN_VISIBLE;
3655 }
3656
3657 void
3658 xsetpointermotion(int set) {
3659 MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
3660 XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
3661 }
3662
3663 void
3664 xseturgency(int add) {
3665 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3666
3667 MODBIT(h->flags, add, XUrgencyHint);
3668 XSetWMHints(xw.dpy, xw.win, h);
3669 XFree(h);
3670 }
3671
3672 void
3673 focus(XEvent *ev) {
3674 XFocusChangeEvent *e = &ev->xfocus;
3675
3676 if(e->mode == NotifyGrab)
3677 return;
3678
3679 if(ev->type == FocusIn) {
3680 XSetICFocus(xw.xic);
3681 xw.state |= WIN_FOCUSED;
3682 xseturgency(0);
3683 if(IS_SET(MODE_FOCUS))
3684 ttywrite("\033[I", 3);
3685 } else {
3686 XUnsetICFocus(xw.xic);
3687 xw.state &= ~WIN_FOCUSED;
3688 if(IS_SET(MODE_FOCUS))
3689 ttywrite("\033[O", 3);
3690 }
3691 }
3692
3693 static inline bool
3694 match(uint mask, uint state) {
3695 return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
3696 }
3697
3698 void
3699 numlock(const Arg *dummy) {
3700 term.numlock ^= 1;
3701 }
3702
3703 char*
3704 kmap(KeySym k, uint state) {
3705 Key *kp;
3706 int i;
3707
3708 /* Check for mapped keys out of X11 function keys. */
3709 for(i = 0; i < LEN(mappedkeys); i++) {
3710 if(mappedkeys[i] == k)
3711 break;
3712 }
3713 if(i == LEN(mappedkeys)) {
3714 if((k & 0xFFFF) < 0xFD00)
3715 return NULL;
3716 }
3717
3718 for(kp = key; kp < key + LEN(key); kp++) {
3719 if(kp->k != k)
3720 continue;
3721
3722 if(!match(kp->mask, state))
3723 continue;
3724
3725 if(IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
3726 continue;
3727 if(term.numlock && kp->appkey == 2)
3728 continue;
3729
3730 if(IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
3731 continue;
3732
3733 if(IS_SET(MODE_CRLF) ? kp->crlf < 0 : kp->crlf > 0)
3734 continue;
3735
3736 return kp->s;
3737 }
3738
3739 return NULL;
3740 }
3741
3742 void
3743 kpress(XEvent *ev) {
3744 XKeyEvent *e = &ev->xkey;
3745 KeySym ksym;
3746 char buf[32], *customkey;
3747 int len;
3748 long c;
3749 Status status;
3750 Shortcut *bp;
3751
3752 if(IS_SET(MODE_KBDLOCK))
3753 return;
3754
3755 len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
3756 /* 1. shortcuts */
3757 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3758 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3759 bp->func(&(bp->arg));
3760 return;
3761 }
3762 }
3763
3764 /* 2. custom keys from config.h */
3765 if((customkey = kmap(ksym, e->state))) {
3766 ttysend(customkey, strlen(customkey));
3767 return;
3768 }
3769
3770 /* 3. composed string from input method */
3771 if(len == 0)
3772 return;
3773 if(len == 1 && e->state & Mod1Mask) {
3774 if(IS_SET(MODE_8BIT)) {
3775 if(*buf < 0177) {
3776 c = *buf | 0x80;
3777 len = utf8encode(c, buf, UTF_SIZ);
3778 }
3779 } else {
3780 buf[1] = buf[0];
3781 buf[0] = '\033';
3782 len = 2;
3783 }
3784 }
3785 ttysend(buf, len);
3786 }
3787
3788
3789 void
3790 cmessage(XEvent *e) {
3791 /*
3792 * See xembed specs
3793 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3794 */
3795 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3796 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3797 xw.state |= WIN_FOCUSED;
3798 xseturgency(0);
3799 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3800 xw.state &= ~WIN_FOCUSED;
3801 }
3802 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3803 /* Send SIGHUP to shell */
3804 kill(pid, SIGHUP);
3805 exit(EXIT_SUCCESS);
3806 }
3807 }
3808
3809 void
3810 cresize(int width, int height) {
3811 int col, row;
3812
3813 if(width != 0)
3814 xw.w = width;
3815 if(height != 0)
3816 xw.h = height;
3817
3818 col = (xw.w - 2 * borderpx) / xw.cw;
3819 row = (xw.h - 2 * borderpx) / xw.ch;
3820
3821 tresize(col, row);
3822 xresize(col, row);
3823 ttyresize();
3824 }
3825
3826 void
3827 resize(XEvent *e) {
3828 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3829 return;
3830
3831 cresize(e->xconfigure.width, e->xconfigure.height);
3832 }
3833
3834 void
3835 run(void) {
3836 XEvent ev;
3837 int w = xw.w, h = xw.h;
3838 fd_set rfd;
3839 int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3840 struct timespec drawtimeout, *tv = NULL, now, last, lastblink;
3841 long deltatime;
3842
3843 /* Waiting for window mapping */
3844 while(1) {
3845 XNextEvent(xw.dpy, &ev);
3846 if(XFilterEvent(&ev, None))
3847 continue;
3848 if(ev.type == ConfigureNotify) {
3849 w = ev.xconfigure.width;
3850 h = ev.xconfigure.height;
3851 } else if(ev.type == MapNotify) {
3852 break;
3853 }
3854 }
3855
3856 ttynew();
3857 cresize(w, h);
3858
3859 clock_gettime(CLOCK_MONOTONIC, &last);
3860 lastblink = last;
3861
3862 for(xev = actionfps;;) {
3863 FD_ZERO(&rfd);
3864 FD_SET(cmdfd, &rfd);
3865 FD_SET(xfd, &rfd);
3866
3867 if(pselect(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv, NULL) < 0) {
3868 if(errno == EINTR)
3869 continue;
3870 die("select failed: %s\n", strerror(errno));
3871 }
3872 if(FD_ISSET(cmdfd, &rfd)) {
3873 ttyread();
3874 if(blinktimeout) {
3875 blinkset = tattrset(ATTR_BLINK);
3876 if(!blinkset)
3877 MODBIT(term.mode, 0, MODE_BLINK);
3878 }
3879 }
3880
3881 if(FD_ISSET(xfd, &rfd))
3882 xev = actionfps;
3883
3884 clock_gettime(CLOCK_MONOTONIC, &now);
3885 drawtimeout.tv_sec = 0;
3886 drawtimeout.tv_nsec = (1000/xfps) * 1E6;
3887 tv = &drawtimeout;
3888
3889 dodraw = 0;
3890 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
3891 tsetdirtattr(ATTR_BLINK);
3892 term.mode ^= MODE_BLINK;
3893 lastblink = now;
3894 dodraw = 1;
3895 }
3896 deltatime = TIMEDIFF(now, last);
3897 if(deltatime > (xev? (1000/xfps) : (1000/actionfps))
3898 || deltatime < 0) {
3899 dodraw = 1;
3900 last = now;
3901 }
3902
3903 if(dodraw) {
3904 while(XPending(xw.dpy)) {
3905 XNextEvent(xw.dpy, &ev);
3906 if(XFilterEvent(&ev, None))
3907 continue;
3908 if(handler[ev.type])
3909 (handler[ev.type])(&ev);
3910 }
3911
3912 draw();
3913 XFlush(xw.dpy);
3914
3915 if(xev && !FD_ISSET(xfd, &rfd))
3916 xev--;
3917 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
3918 if(blinkset) {
3919 if(TIMEDIFF(now, lastblink) \
3920 > blinktimeout) {
3921 drawtimeout.tv_nsec = 1000;
3922 } else {
3923 drawtimeout.tv_nsec = (1E6 * \
3924 (blinktimeout - \
3925 TIMEDIFF(now,
3926 lastblink)));
3927 }
3928 drawtimeout.tv_sec = \
3929 drawtimeout.tv_nsec / 1E9;
3930 drawtimeout.tv_nsec %= (long)1E9;
3931 } else {
3932 tv = NULL;
3933 }
3934 }
3935 }
3936 }
3937 }
3938
3939 void
3940 usage(void) {
3941 die("%s " VERSION " (c) 2010-2015 st engineers\n" \
3942 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]\n"
3943 " [-i] [-t title] [-w windowid] [-e command ...]\n", argv0);
3944 }
3945
3946 int
3947 main(int argc, char *argv[]) {
3948 char *titles;
3949 uint cols = 80, rows = 24;
3950
3951 xw.l = xw.t = 0;
3952 xw.isfixed = False;
3953
3954 ARGBEGIN {
3955 case 'a':
3956 allowaltscreen = false;
3957 break;
3958 case 'c':
3959 opt_class = EARGF(usage());
3960 break;
3961 case 'e':
3962 /* eat all remaining arguments */
3963 if(argc > 1) {
3964 opt_cmd = &argv[1];
3965 if(argv[1] != NULL && opt_title == NULL) {
3966 titles = xstrdup(argv[1]);
3967 opt_title = basename(titles);
3968 }
3969 }
3970 goto run;
3971 case 'f':
3972 opt_font = EARGF(usage());
3973 break;
3974 case 'g':
3975 xw.gm = XParseGeometry(EARGF(usage()),
3976 &xw.l, &xw.t, &cols, &rows);
3977 break;
3978 case 'i':
3979 xw.isfixed = True;
3980 break;
3981 case 'o':
3982 opt_io = EARGF(usage());
3983 break;
3984 case 't':
3985 opt_title = EARGF(usage());
3986 break;
3987 case 'w':
3988 opt_embed = EARGF(usage());
3989 break;
3990 case 'v':
3991 default:
3992 usage();
3993 } ARGEND;
3994
3995 run:
3996 setlocale(LC_CTYPE, "");
3997 XSetLocaleModifiers("");
3998 tnew(cols? cols : 1, rows? rows : 1);
3999 xinit();
4000 selinit();
4001 run();
4002
4003 return 0;
4004 }
4005