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c61b90ab8afb26f0f2e21b031923d66dd11a42ee
[st.git] / st.c
1 /* See LICENSE for licence details. */
2 #include <ctype.h>
3 #include <errno.h>
4 #include <fcntl.h>
5 #include <limits.h>
6 #include <locale.h>
7 #include <pwd.h>
8 #include <stdarg.h>
9 #include <stdbool.h>
10 #include <stdio.h>
11 #include <stdlib.h>
12 #include <string.h>
13 #include <signal.h>
14 #include <stdint.h>
15 #include <sys/ioctl.h>
16 #include <sys/select.h>
17 #include <sys/stat.h>
18 #include <sys/time.h>
19 #include <sys/types.h>
20 #include <sys/wait.h>
21 #include <time.h>
22 #include <unistd.h>
23 #include <libgen.h>
24 #include <X11/Xatom.h>
25 #include <X11/Xlib.h>
26 #include <X11/Xutil.h>
27 #include <X11/cursorfont.h>
28 #include <X11/keysym.h>
29 #include <X11/Xft/Xft.h>
30 #include <X11/XKBlib.h>
31 #include <fontconfig/fontconfig.h>
32 #include <wchar.h>
33
34 #include "arg.h"
35
36 char *argv0;
37
38 #define Glyph Glyph_
39 #define Font Font_
40
41 #if defined(__linux)
42 #include <pty.h>
43 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
44 #include <util.h>
45 #elif defined(__FreeBSD__) || defined(__DragonFly__)
46 #include <libutil.h>
47 #endif
48
49
50 /* XEMBED messages */
51 #define XEMBED_FOCUS_IN 4
52 #define XEMBED_FOCUS_OUT 5
53
54 /* Arbitrary sizes */
55 #define UTF_INVALID 0xFFFD
56 #define UTF_SIZ 4
57 #define ESC_BUF_SIZ (128*UTF_SIZ)
58 #define ESC_ARG_SIZ 16
59 #define STR_BUF_SIZ ESC_BUF_SIZ
60 #define STR_ARG_SIZ ESC_ARG_SIZ
61 #define DRAW_BUF_SIZ 20*1024
62 #define XK_ANY_MOD UINT_MAX
63 #define XK_NO_MOD 0
64 #define XK_SWITCH_MOD (1<<13)
65
66 #define REDRAW_TIMEOUT (80*1000) /* 80 ms */
67
68 /* macros */
69 #define MIN(a, b) ((a) < (b) ? (a) : (b))
70 #define MAX(a, b) ((a) < (b) ? (b) : (a))
71 #define LEN(a) (sizeof(a) / sizeof(a)[0])
72 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
73 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
74 #define ISCONTROLC0(c) (BETWEEN(c, 0, 0x1f) || (c) == '\177')
75 #define ISCONTROLC1(c) (BETWEEN(c, 0x80, 0x9f))
76 #define ISCONTROL(c) (ISCONTROLC0(c) || ISCONTROLC1(c))
77 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
78 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
79 #define IS_SET(flag) ((term.mode & (flag)) != 0)
80 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_nsec-t2.tv_nsec)/1E6)
81 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
82
83 #define TRUECOLOR(r,g,b) (1 << 24 | (r) << 16 | (g) << 8 | (b))
84 #define IS_TRUECOL(x) (1 << 24 & (x))
85 #define TRUERED(x) (((x) & 0xff0000) >> 8)
86 #define TRUEGREEN(x) (((x) & 0xff00))
87 #define TRUEBLUE(x) (((x) & 0xff) << 8)
88
89
90 enum glyph_attribute {
91 ATTR_NULL = 0,
92 ATTR_BOLD = 1 << 0,
93 ATTR_FAINT = 1 << 1,
94 ATTR_ITALIC = 1 << 2,
95 ATTR_UNDERLINE = 1 << 3,
96 ATTR_BLINK = 1 << 4,
97 ATTR_REVERSE = 1 << 5,
98 ATTR_INVISIBLE = 1 << 6,
99 ATTR_STRUCK = 1 << 7,
100 ATTR_WRAP = 1 << 8,
101 ATTR_WIDE = 1 << 9,
102 ATTR_WDUMMY = 1 << 10,
103 };
104
105 enum cursor_movement {
106 CURSOR_SAVE,
107 CURSOR_LOAD
108 };
109
110 enum cursor_state {
111 CURSOR_DEFAULT = 0,
112 CURSOR_WRAPNEXT = 1,
113 CURSOR_ORIGIN = 2
114 };
115
116 enum term_mode {
117 MODE_WRAP = 1 << 0,
118 MODE_INSERT = 1 << 1,
119 MODE_APPKEYPAD = 1 << 2,
120 MODE_ALTSCREEN = 1 << 3,
121 MODE_CRLF = 1 << 4,
122 MODE_MOUSEBTN = 1 << 5,
123 MODE_MOUSEMOTION = 1 << 6,
124 MODE_REVERSE = 1 << 7,
125 MODE_KBDLOCK = 1 << 8,
126 MODE_HIDE = 1 << 9,
127 MODE_ECHO = 1 << 10,
128 MODE_APPCURSOR = 1 << 11,
129 MODE_MOUSESGR = 1 << 12,
130 MODE_8BIT = 1 << 13,
131 MODE_BLINK = 1 << 14,
132 MODE_FBLINK = 1 << 15,
133 MODE_FOCUS = 1 << 16,
134 MODE_MOUSEX10 = 1 << 17,
135 MODE_MOUSEMANY = 1 << 18,
136 MODE_BRCKTPASTE = 1 << 19,
137 MODE_PRINT = 1 << 20,
138 MODE_MOUSE = MODE_MOUSEBTN|MODE_MOUSEMOTION|MODE_MOUSEX10\
139 |MODE_MOUSEMANY,
140 };
141
142 enum charset {
143 CS_GRAPHIC0,
144 CS_GRAPHIC1,
145 CS_UK,
146 CS_USA,
147 CS_MULTI,
148 CS_GER,
149 CS_FIN
150 };
151
152 enum escape_state {
153 ESC_START = 1,
154 ESC_CSI = 2,
155 ESC_STR = 4, /* DCS, OSC, PM, APC */
156 ESC_ALTCHARSET = 8,
157 ESC_STR_END = 16, /* a final string was encountered */
158 ESC_TEST = 32, /* Enter in test mode */
159 };
160
161 enum window_state {
162 WIN_VISIBLE = 1,
163 WIN_REDRAW = 2,
164 WIN_FOCUSED = 4
165 };
166
167 enum selection_type {
168 SEL_REGULAR = 1,
169 SEL_RECTANGULAR = 2
170 };
171
172 enum selection_snap {
173 SNAP_WORD = 1,
174 SNAP_LINE = 2
175 };
176
177 typedef unsigned char uchar;
178 typedef unsigned int uint;
179 typedef unsigned long ulong;
180 typedef unsigned short ushort;
181
182 typedef XftDraw *Draw;
183 typedef XftColor Color;
184
185 typedef struct {
186 char c[UTF_SIZ]; /* character code */
187 ushort mode; /* attribute flags */
188 uint32_t fg; /* foreground */
189 uint32_t bg; /* background */
190 } Glyph;
191
192 typedef Glyph *Line;
193
194 typedef struct {
195 Glyph attr; /* current char attributes */
196 int x;
197 int y;
198 char state;
199 } TCursor;
200
201 /* CSI Escape sequence structs */
202 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
203 typedef struct {
204 char buf[ESC_BUF_SIZ]; /* raw string */
205 int len; /* raw string length */
206 char priv;
207 int arg[ESC_ARG_SIZ];
208 int narg; /* nb of args */
209 char mode;
210 } CSIEscape;
211
212 /* STR Escape sequence structs */
213 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
214 typedef struct {
215 char type; /* ESC type ... */
216 char buf[STR_BUF_SIZ]; /* raw string */
217 int len; /* raw string length */
218 char *args[STR_ARG_SIZ];
219 int narg; /* nb of args */
220 } STREscape;
221
222 /* Internal representation of the screen */
223 typedef struct {
224 int row; /* nb row */
225 int col; /* nb col */
226 Line *line; /* screen */
227 Line *alt; /* alternate screen */
228 bool *dirty; /* dirtyness of lines */
229 TCursor c; /* cursor */
230 int top; /* top scroll limit */
231 int bot; /* bottom scroll limit */
232 int mode; /* terminal mode flags */
233 int esc; /* escape state flags */
234 char trantbl[4]; /* charset table translation */
235 int charset; /* current charset */
236 int icharset; /* selected charset for sequence */
237 bool numlock; /* lock numbers in keyboard */
238 bool *tabs;
239 } Term;
240
241 /* Purely graphic info */
242 typedef struct {
243 Display *dpy;
244 Colormap cmap;
245 Window win;
246 Drawable buf;
247 Atom xembed, wmdeletewin, netwmname, netwmpid;
248 XIM xim;
249 XIC xic;
250 Draw draw;
251 Visual *vis;
252 XSetWindowAttributes attrs;
253 int scr;
254 bool isfixed; /* is fixed geometry? */
255 int l, t; /* left and top offset */
256 int gm; /* geometry mask */
257 int tw, th; /* tty width and height */
258 int w, h; /* window width and height */
259 int ch; /* char height */
260 int cw; /* char width */
261 char state; /* focus, redraw, visible */
262 } XWindow;
263
264 typedef struct {
265 uint b;
266 uint mask;
267 char *s;
268 } Mousekey;
269
270 typedef struct {
271 KeySym k;
272 uint mask;
273 char *s;
274 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
275 signed char appkey; /* application keypad */
276 signed char appcursor; /* application cursor */
277 signed char crlf; /* crlf mode */
278 } Key;
279
280 typedef struct {
281 int mode;
282 int type;
283 int snap;
284 /*
285 * Selection variables:
286 * nb – normalized coordinates of the beginning of the selection
287 * ne – normalized coordinates of the end of the selection
288 * ob – original coordinates of the beginning of the selection
289 * oe – original coordinates of the end of the selection
290 */
291 struct {
292 int x, y;
293 } nb, ne, ob, oe;
294
295 char *clip;
296 Atom xtarget;
297 bool alt;
298 struct timespec tclick1;
299 struct timespec tclick2;
300 } Selection;
301
302 typedef union {
303 int i;
304 uint ui;
305 float f;
306 const void *v;
307 } Arg;
308
309 typedef struct {
310 uint mod;
311 KeySym keysym;
312 void (*func)(const Arg *);
313 const Arg arg;
314 } Shortcut;
315
316 /* function definitions used in config.h */
317 static void clippaste(const Arg *);
318 static void numlock(const Arg *);
319 static void selpaste(const Arg *);
320 static void xzoom(const Arg *);
321 static void xzoomabs(const Arg *);
322 static void xzoomreset(const Arg *);
323 static void printsel(const Arg *);
324 static void printscreen(const Arg *) ;
325 static void toggleprinter(const Arg *);
326
327 /* Config.h for applying patches and the configuration. */
328 #include "config.h"
329
330 /* Font structure */
331 typedef struct {
332 int height;
333 int width;
334 int ascent;
335 int descent;
336 short lbearing;
337 short rbearing;
338 XftFont *match;
339 FcFontSet *set;
340 FcPattern *pattern;
341 } Font;
342
343 /* Drawing Context */
344 typedef struct {
345 Color col[MAX(LEN(colorname), 256)];
346 Font font, bfont, ifont, ibfont;
347 GC gc;
348 } DC;
349
350 static void die(const char *, ...);
351 static void draw(void);
352 static void redraw(int);
353 static void drawregion(int, int, int, int);
354 static void execsh(void);
355 static void sigchld(int);
356 static void run(void);
357
358 static void csidump(void);
359 static void csihandle(void);
360 static void csiparse(void);
361 static void csireset(void);
362 static int eschandle(uchar ascii);
363 static void strdump(void);
364 static void strhandle(void);
365 static void strparse(void);
366 static void strreset(void);
367
368 static int tattrset(int);
369 static void tprinter(char *, size_t);
370 static void tdumpsel(void);
371 static void tdumpline(int);
372 static void tdump(void);
373 static void tclearregion(int, int, int, int);
374 static void tcursor(int);
375 static void tdeletechar(int);
376 static void tdeleteline(int);
377 static void tinsertblank(int);
378 static void tinsertblankline(int);
379 static int tlinelen(int);
380 static void tmoveto(int, int);
381 static void tmoveato(int, int);
382 static void tnew(int, int);
383 static void tnewline(int);
384 static void tputtab(int);
385 static void tputc(char *, int);
386 static void treset(void);
387 static void tresize(int, int);
388 static void tscrollup(int, int);
389 static void tscrolldown(int, int);
390 static void tsetattr(int *, int);
391 static void tsetchar(char *, Glyph *, int, int);
392 static void tsetscroll(int, int);
393 static void tswapscreen(void);
394 static void tsetdirt(int, int);
395 static void tsetdirtattr(int);
396 static void tsetmode(bool, bool, int *, int);
397 static void tfulldirt(void);
398 static void techo(char *, int);
399 static void tcontrolcode(uchar );
400 static void tdectest(char );
401 static int32_t tdefcolor(int *, int *, int);
402 static void tdeftran(char);
403 static inline bool match(uint, uint);
404 static void ttynew(void);
405 static void ttyread(void);
406 static void ttyresize(void);
407 static void ttysend(char *, size_t);
408 static void ttywrite(const char *, size_t);
409 static void tstrsequence(uchar c);
410
411 static void xdraws(char *, Glyph, int, int, int, int);
412 static void xhints(void);
413 static void xclear(int, int, int, int);
414 static void xdrawcursor(void);
415 static void xinit(void);
416 static void xloadcols(void);
417 static int xsetcolorname(int, const char *);
418 static int xgeommasktogravity(int);
419 static int xloadfont(Font *, FcPattern *);
420 static void xloadfonts(char *, double);
421 static int xloadfontset(Font *);
422 static void xsettitle(char *);
423 static void xresettitle(void);
424 static void xsetpointermotion(int);
425 static void xseturgency(int);
426 static void xsetsel(char *);
427 static void xtermclear(int, int, int, int);
428 static void xunloadfont(Font *);
429 static void xunloadfonts(void);
430 static void xresize(int, int);
431
432 static void expose(XEvent *);
433 static void visibility(XEvent *);
434 static void unmap(XEvent *);
435 static char *kmap(KeySym, uint);
436 static void kpress(XEvent *);
437 static void cmessage(XEvent *);
438 static void cresize(int, int);
439 static void resize(XEvent *);
440 static void focus(XEvent *);
441 static void brelease(XEvent *);
442 static void bpress(XEvent *);
443 static void bmotion(XEvent *);
444 static void selnotify(XEvent *);
445 static void selclear(XEvent *);
446 static void selrequest(XEvent *);
447
448 static void selinit(void);
449 static void selnormalize(void);
450 static inline bool selected(int, int);
451 static char *getsel(void);
452 static void selcopy(void);
453 static void selscroll(int, int);
454 static void selsnap(int, int *, int *, int);
455 static void getbuttoninfo(XEvent *);
456 static void mousereport(XEvent *);
457
458 static size_t utf8decode(char *, long *, size_t);
459 static long utf8decodebyte(char, size_t *);
460 static size_t utf8encode(long, char *, size_t);
461 static char utf8encodebyte(long, size_t);
462 static size_t utf8len(char *);
463 static size_t utf8validate(long *, size_t);
464
465 static ssize_t xwrite(int, const char *, size_t);
466 static void *xmalloc(size_t);
467 static void *xrealloc(void *, size_t);
468 static char *xstrdup(char *);
469
470 static void usage(void);
471
472 static void (*handler[LASTEvent])(XEvent *) = {
473 [KeyPress] = kpress,
474 [ClientMessage] = cmessage,
475 [ConfigureNotify] = resize,
476 [VisibilityNotify] = visibility,
477 [UnmapNotify] = unmap,
478 [Expose] = expose,
479 [FocusIn] = focus,
480 [FocusOut] = focus,
481 [MotionNotify] = bmotion,
482 [ButtonPress] = bpress,
483 [ButtonRelease] = brelease,
484 [SelectionClear] = selclear,
485 [SelectionNotify] = selnotify,
486 [SelectionRequest] = selrequest,
487 };
488
489 /* Globals */
490 static DC dc;
491 static XWindow xw;
492 static Term term;
493 static CSIEscape csiescseq;
494 static STREscape strescseq;
495 static int cmdfd;
496 static pid_t pid;
497 static Selection sel;
498 static int iofd = STDOUT_FILENO;
499 static char **opt_cmd = NULL;
500 static char *opt_io = NULL;
501 static char *opt_title = NULL;
502 static char *opt_embed = NULL;
503 static char *opt_class = NULL;
504 static char *opt_font = NULL;
505 static int oldbutton = 3; /* button event on startup: 3 = release */
506
507 static char *usedfont = NULL;
508 static double usedfontsize = 0;
509 static double defaultfontsize = 0;
510
511 static uchar utfbyte[UTF_SIZ + 1] = {0x80, 0, 0xC0, 0xE0, 0xF0};
512 static uchar utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
513 static long utfmin[UTF_SIZ + 1] = { 0, 0, 0x80, 0x800, 0x10000};
514 static long utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
515
516 /* Font Ring Cache */
517 enum {
518 FRC_NORMAL,
519 FRC_ITALIC,
520 FRC_BOLD,
521 FRC_ITALICBOLD
522 };
523
524 typedef struct {
525 XftFont *font;
526 int flags;
527 } Fontcache;
528
529 /* Fontcache is an array now. A new font will be appended to the array. */
530 static Fontcache frc[16];
531 static int frclen = 0;
532
533 ssize_t
534 xwrite(int fd, const char *s, size_t len) {
535 size_t aux = len;
536
537 while(len > 0) {
538 ssize_t r = write(fd, s, len);
539 if(r < 0)
540 return r;
541 len -= r;
542 s += r;
543 }
544 return aux;
545 }
546
547 void *
548 xmalloc(size_t len) {
549 void *p = malloc(len);
550
551 if(!p)
552 die("Out of memory\n");
553
554 return p;
555 }
556
557 void *
558 xrealloc(void *p, size_t len) {
559 if((p = realloc(p, len)) == NULL)
560 die("Out of memory\n");
561
562 return p;
563 }
564
565 char *
566 xstrdup(char *s) {
567 if((s = strdup(s)) == NULL)
568 die("Out of memory\n");
569
570 return s;
571 }
572
573 size_t
574 utf8decode(char *c, long *u, size_t clen) {
575 size_t i, j, len, type;
576 long udecoded;
577
578 *u = UTF_INVALID;
579 if(!clen)
580 return 0;
581 udecoded = utf8decodebyte(c[0], &len);
582 if(!BETWEEN(len, 1, UTF_SIZ))
583 return 1;
584 for(i = 1, j = 1; i < clen && j < len; ++i, ++j) {
585 udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
586 if(type != 0)
587 return j;
588 }
589 if(j < len)
590 return 0;
591 *u = udecoded;
592 utf8validate(u, len);
593 return len;
594 }
595
596 long
597 utf8decodebyte(char c, size_t *i) {
598 for(*i = 0; *i < LEN(utfmask); ++(*i))
599 if(((uchar)c & utfmask[*i]) == utfbyte[*i])
600 return (uchar)c & ~utfmask[*i];
601 return 0;
602 }
603
604 size_t
605 utf8encode(long u, char *c, size_t clen) {
606 size_t len, i;
607
608 len = utf8validate(&u, 0);
609 if(clen < len)
610 return 0;
611 for(i = len - 1; i != 0; --i) {
612 c[i] = utf8encodebyte(u, 0);
613 u >>= 6;
614 }
615 c[0] = utf8encodebyte(u, len);
616 return len;
617 }
618
619 char
620 utf8encodebyte(long u, size_t i) {
621 return utfbyte[i] | (u & ~utfmask[i]);
622 }
623
624 size_t
625 utf8len(char *c) {
626 return utf8decode(c, &(long){0}, UTF_SIZ);
627 }
628
629 size_t
630 utf8validate(long *u, size_t i) {
631 if(!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF))
632 *u = UTF_INVALID;
633 for(i = 1; *u > utfmax[i]; ++i)
634 ;
635 return i;
636 }
637
638 static void
639 selinit(void) {
640 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
641 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
642 sel.mode = 0;
643 sel.ob.x = -1;
644 sel.clip = NULL;
645 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
646 if(sel.xtarget == None)
647 sel.xtarget = XA_STRING;
648 }
649
650 static int
651 x2col(int x) {
652 x -= borderpx;
653 x /= xw.cw;
654
655 return LIMIT(x, 0, term.col-1);
656 }
657
658 static int
659 y2row(int y) {
660 y -= borderpx;
661 y /= xw.ch;
662
663 return LIMIT(y, 0, term.row-1);
664 }
665
666 static int tlinelen(int y) {
667 int i = term.col;
668
669 if(term.line[y][i - 1].mode & ATTR_WRAP)
670 return i;
671
672 while(i > 0 && term.line[y][i - 1].c[0] == ' ')
673 --i;
674
675 return i;
676 }
677
678 static void
679 selnormalize(void) {
680 int i;
681
682 if(sel.ob.y == sel.oe.y || sel.type == SEL_RECTANGULAR) {
683 sel.nb.x = MIN(sel.ob.x, sel.oe.x);
684 sel.ne.x = MAX(sel.ob.x, sel.oe.x);
685 } else {
686 sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
687 sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
688 }
689 sel.nb.y = MIN(sel.ob.y, sel.oe.y);
690 sel.ne.y = MAX(sel.ob.y, sel.oe.y);
691
692 selsnap(sel.snap, &sel.nb.x, &sel.nb.y, -1);
693 selsnap(sel.snap, &sel.ne.x, &sel.ne.y, +1);
694
695 /* expand selection over line breaks */
696 if (sel.type == SEL_RECTANGULAR)
697 return;
698 i = tlinelen(sel.nb.y);
699 if (i < sel.nb.x)
700 sel.nb.x = i;
701 if (tlinelen(sel.ne.y) <= sel.ne.x)
702 sel.ne.x = term.col - 1;
703 }
704
705 static inline bool
706 selected(int x, int y) {
707 if(sel.type == SEL_RECTANGULAR)
708 return BETWEEN(y, sel.nb.y, sel.ne.y)
709 && BETWEEN(x, sel.nb.x, sel.ne.x);
710
711 return BETWEEN(y, sel.nb.y, sel.ne.y)
712 && (y != sel.nb.y || x >= sel.nb.x)
713 && (y != sel.ne.y || x <= sel.ne.x);
714 }
715
716 void
717 selsnap(int mode, int *x, int *y, int direction) {
718 int newx, newy, xt, yt;
719 bool delim, prevdelim;
720 Glyph *gp, *prevgp;
721
722 switch(mode) {
723 case SNAP_WORD:
724 /*
725 * Snap around if the word wraps around at the end or
726 * beginning of a line.
727 */
728 prevgp = &term.line[*y][*x];
729 prevdelim = strchr(worddelimiters, prevgp->c[0]) != NULL;
730 for(;;) {
731 newx = *x + direction;
732 newy = *y;
733 if(!BETWEEN(newx, 0, term.col - 1)) {
734 newy += direction;
735 newx = (newx + term.col) % term.col;
736 if (!BETWEEN(newy, 0, term.row - 1))
737 break;
738
739 if(direction > 0)
740 yt = *y, xt = *x;
741 else
742 yt = newy, xt = newx;
743 if(!(term.line[yt][xt].mode & ATTR_WRAP))
744 break;
745 }
746
747 if (newx >= tlinelen(newy))
748 break;
749
750 gp = &term.line[newy][newx];
751 delim = strchr(worddelimiters, gp->c[0]) != NULL;
752 if(!(gp->mode & ATTR_WDUMMY) && (delim != prevdelim
753 || (delim && gp->c[0] != prevgp->c[0])))
754 break;
755
756 *x = newx;
757 *y = newy;
758 prevgp = gp;
759 prevdelim = delim;
760 }
761 break;
762 case SNAP_LINE:
763 /*
764 * Snap around if the the previous line or the current one
765 * has set ATTR_WRAP at its end. Then the whole next or
766 * previous line will be selected.
767 */
768 *x = (direction < 0) ? 0 : term.col - 1;
769 if(direction < 0 && *y > 0) {
770 for(; *y > 0; *y += direction) {
771 if(!(term.line[*y-1][term.col-1].mode
772 & ATTR_WRAP)) {
773 break;
774 }
775 }
776 } else if(direction > 0 && *y < term.row-1) {
777 for(; *y < term.row; *y += direction) {
778 if(!(term.line[*y][term.col-1].mode
779 & ATTR_WRAP)) {
780 break;
781 }
782 }
783 }
784 break;
785 }
786 }
787
788 void
789 getbuttoninfo(XEvent *e) {
790 int type;
791 uint state = e->xbutton.state & ~(Button1Mask | forceselmod);
792
793 sel.alt = IS_SET(MODE_ALTSCREEN);
794
795 sel.oe.x = x2col(e->xbutton.x);
796 sel.oe.y = y2row(e->xbutton.y);
797 selnormalize();
798
799 sel.type = SEL_REGULAR;
800 for(type = 1; type < LEN(selmasks); ++type) {
801 if(match(selmasks[type], state)) {
802 sel.type = type;
803 break;
804 }
805 }
806 }
807
808 void
809 mousereport(XEvent *e) {
810 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
811 button = e->xbutton.button, state = e->xbutton.state,
812 len;
813 char buf[40];
814 static int ox, oy;
815
816 /* from urxvt */
817 if(e->xbutton.type == MotionNotify) {
818 if(x == ox && y == oy)
819 return;
820 if(!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
821 return;
822 /* MOUSE_MOTION: no reporting if no button is pressed */
823 if(IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
824 return;
825
826 button = oldbutton + 32;
827 ox = x;
828 oy = y;
829 } else {
830 if(!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
831 button = 3;
832 } else {
833 button -= Button1;
834 if(button >= 3)
835 button += 64 - 3;
836 }
837 if(e->xbutton.type == ButtonPress) {
838 oldbutton = button;
839 ox = x;
840 oy = y;
841 } else if(e->xbutton.type == ButtonRelease) {
842 oldbutton = 3;
843 /* MODE_MOUSEX10: no button release reporting */
844 if(IS_SET(MODE_MOUSEX10))
845 return;
846 if (button == 64 || button == 65)
847 return;
848 }
849 }
850
851 if(!IS_SET(MODE_MOUSEX10)) {
852 button += (state & ShiftMask ? 4 : 0)
853 + (state & Mod4Mask ? 8 : 0)
854 + (state & ControlMask ? 16 : 0);
855 }
856
857 len = 0;
858 if(IS_SET(MODE_MOUSESGR)) {
859 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
860 button, x+1, y+1,
861 e->xbutton.type == ButtonRelease ? 'm' : 'M');
862 } else if(x < 223 && y < 223) {
863 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
864 32+button, 32+x+1, 32+y+1);
865 } else {
866 return;
867 }
868
869 ttywrite(buf, len);
870 }
871
872 void
873 bpress(XEvent *e) {
874 struct timespec now;
875 Mousekey *mk;
876
877 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
878 mousereport(e);
879 return;
880 }
881
882 for(mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
883 if(e->xbutton.button == mk->b
884 && match(mk->mask, e->xbutton.state)) {
885 ttysend(mk->s, strlen(mk->s));
886 return;
887 }
888 }
889
890 if(e->xbutton.button == Button1) {
891 clock_gettime(CLOCK_MONOTONIC, &now);
892
893 /* Clear previous selection, logically and visually. */
894 selclear(NULL);
895 sel.mode = 1;
896 sel.type = SEL_REGULAR;
897 sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
898 sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
899
900 /*
901 * If the user clicks below predefined timeouts specific
902 * snapping behaviour is exposed.
903 */
904 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
905 sel.snap = SNAP_LINE;
906 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
907 sel.snap = SNAP_WORD;
908 } else {
909 sel.snap = 0;
910 }
911 selnormalize();
912
913 /*
914 * Draw selection, unless it's regular and we don't want to
915 * make clicks visible
916 */
917 if(sel.snap != 0) {
918 sel.mode++;
919 tsetdirt(sel.nb.y, sel.ne.y);
920 }
921 sel.tclick2 = sel.tclick1;
922 sel.tclick1 = now;
923 }
924 }
925
926 char *
927 getsel(void) {
928 char *str, *ptr;
929 int y, bufsize, size, lastx, linelen;
930 Glyph *gp, *last;
931
932 if(sel.ob.x == -1)
933 return NULL;
934
935 bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
936 ptr = str = xmalloc(bufsize);
937
938 /* append every set & selected glyph to the selection */
939 for(y = sel.nb.y; y < sel.ne.y + 1; y++) {
940 linelen = tlinelen(y);
941
942 if(sel.type == SEL_RECTANGULAR) {
943 gp = &term.line[y][sel.nb.x];
944 lastx = sel.ne.x;
945 } else {
946 gp = &term.line[y][sel.nb.y == y ? sel.nb.x : 0];
947 lastx = (sel.ne.y == y) ? sel.ne.x : term.col-1;
948 }
949 last = &term.line[y][MIN(lastx, linelen-1)];
950
951 for( ; gp <= last; ++gp) {
952 if(gp->mode & ATTR_WDUMMY)
953 continue;
954
955 size = utf8len(gp->c);
956 memcpy(ptr, gp->c, size);
957 ptr += size;
958 }
959
960 /*
961 * Copy and pasting of line endings is inconsistent
962 * in the inconsistent terminal and GUI world.
963 * The best solution seems like to produce '\n' when
964 * something is copied from st and convert '\n' to
965 * '\r', when something to be pasted is received by
966 * st.
967 * FIXME: Fix the computer world.
968 */
969 if((y < sel.ne.y || lastx >= linelen) && !(last->mode & ATTR_WRAP))
970 *ptr++ = '\n';
971 }
972 *ptr = 0;
973 return str;
974 }
975
976 void
977 selcopy(void) {
978 xsetsel(getsel());
979 }
980
981 void
982 selnotify(XEvent *e) {
983 ulong nitems, ofs, rem;
984 int format;
985 uchar *data, *last, *repl;
986 Atom type;
987
988 ofs = 0;
989 do {
990 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
991 False, AnyPropertyType, &type, &format,
992 &nitems, &rem, &data)) {
993 fprintf(stderr, "Clipboard allocation failed\n");
994 return;
995 }
996
997 /*
998 * As seen in getsel:
999 * Line endings are inconsistent in the terminal and GUI world
1000 * copy and pasting. When receiving some selection data,
1001 * replace all '\n' with '\r'.
1002 * FIXME: Fix the computer world.
1003 */
1004 repl = data;
1005 last = data + nitems * format / 8;
1006 while((repl = memchr(repl, '\n', last - repl))) {
1007 *repl++ = '\r';
1008 }
1009
1010 if(IS_SET(MODE_BRCKTPASTE))
1011 ttywrite("\033[200~", 6);
1012 ttysend((char *)data, nitems * format / 8);
1013 if(IS_SET(MODE_BRCKTPASTE))
1014 ttywrite("\033[201~", 6);
1015 XFree(data);
1016 /* number of 32-bit chunks returned */
1017 ofs += nitems * format / 32;
1018 } while(rem > 0);
1019 }
1020
1021 void
1022 selpaste(const Arg *dummy) {
1023 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
1024 xw.win, CurrentTime);
1025 }
1026
1027 void
1028 clippaste(const Arg *dummy) {
1029 Atom clipboard;
1030
1031 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1032 XConvertSelection(xw.dpy, clipboard, sel.xtarget, XA_PRIMARY,
1033 xw.win, CurrentTime);
1034 }
1035
1036 void
1037 selclear(XEvent *e) {
1038 if(sel.ob.x == -1)
1039 return;
1040 sel.ob.x = -1;
1041 tsetdirt(sel.nb.y, sel.ne.y);
1042 }
1043
1044 void
1045 selrequest(XEvent *e) {
1046 XSelectionRequestEvent *xsre;
1047 XSelectionEvent xev;
1048 Atom xa_targets, string;
1049
1050 xsre = (XSelectionRequestEvent *) e;
1051 xev.type = SelectionNotify;
1052 xev.requestor = xsre->requestor;
1053 xev.selection = xsre->selection;
1054 xev.target = xsre->target;
1055 xev.time = xsre->time;
1056 /* reject */
1057 xev.property = None;
1058
1059 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
1060 if(xsre->target == xa_targets) {
1061 /* respond with the supported type */
1062 string = sel.xtarget;
1063 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1064 XA_ATOM, 32, PropModeReplace,
1065 (uchar *) &string, 1);
1066 xev.property = xsre->property;
1067 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
1068 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1069 xsre->target, 8, PropModeReplace,
1070 (uchar *) sel.clip, strlen(sel.clip));
1071 xev.property = xsre->property;
1072 }
1073
1074 /* all done, send a notification to the listener */
1075 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
1076 fprintf(stderr, "Error sending SelectionNotify event\n");
1077 }
1078
1079 void
1080 xsetsel(char *str) {
1081 /* register the selection for both the clipboard and the primary */
1082 Atom clipboard;
1083
1084 free(sel.clip);
1085 sel.clip = str;
1086
1087 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
1088
1089 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1090 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
1091 }
1092
1093 void
1094 brelease(XEvent *e) {
1095 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1096 mousereport(e);
1097 return;
1098 }
1099
1100 if(e->xbutton.button == Button2) {
1101 selpaste(NULL);
1102 } else if(e->xbutton.button == Button1) {
1103 if(sel.mode < 2) {
1104 selclear(NULL);
1105 } else {
1106 getbuttoninfo(e);
1107 selcopy();
1108 }
1109 sel.mode = 0;
1110 tsetdirt(sel.nb.y, sel.ne.y);
1111 }
1112 }
1113
1114 void
1115 bmotion(XEvent *e) {
1116 int oldey, oldex, oldsby, oldsey;
1117
1118 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1119 mousereport(e);
1120 return;
1121 }
1122
1123 if(!sel.mode)
1124 return;
1125
1126 sel.mode++;
1127 oldey = sel.oe.y;
1128 oldex = sel.oe.x;
1129 oldsby = sel.nb.y;
1130 oldsey = sel.ne.y;
1131 getbuttoninfo(e);
1132
1133 if(oldey != sel.oe.y || oldex != sel.oe.x)
1134 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
1135 }
1136
1137 void
1138 die(const char *errstr, ...) {
1139 va_list ap;
1140
1141 va_start(ap, errstr);
1142 vfprintf(stderr, errstr, ap);
1143 va_end(ap);
1144 exit(EXIT_FAILURE);
1145 }
1146
1147 void
1148 execsh(void) {
1149 char **args, *sh;
1150 const struct passwd *pw;
1151 char buf[sizeof(long) * 8 + 1];
1152
1153 errno = 0;
1154 if((pw = getpwuid(getuid())) == NULL) {
1155 if(errno)
1156 die("getpwuid:%s\n", strerror(errno));
1157 else
1158 die("who are you?\n");
1159 }
1160
1161 if (utmp)
1162 sh = utmp;
1163 else if (pw->pw_shell[0])
1164 sh = pw->pw_shell;
1165 else
1166 sh = shell;
1167 args = (opt_cmd) ? opt_cmd : (char *[]){sh, NULL};
1168 snprintf(buf, sizeof(buf), "%lu", xw.win);
1169
1170 unsetenv("COLUMNS");
1171 unsetenv("LINES");
1172 unsetenv("TERMCAP");
1173 setenv("LOGNAME", pw->pw_name, 1);
1174 setenv("USER", pw->pw_name, 1);
1175 setenv("SHELL", args[0], 1);
1176 setenv("HOME", pw->pw_dir, 1);
1177 setenv("TERM", termname, 1);
1178 setenv("WINDOWID", buf, 1);
1179
1180 signal(SIGCHLD, SIG_DFL);
1181 signal(SIGHUP, SIG_DFL);
1182 signal(SIGINT, SIG_DFL);
1183 signal(SIGQUIT, SIG_DFL);
1184 signal(SIGTERM, SIG_DFL);
1185 signal(SIGALRM, SIG_DFL);
1186
1187 execvp(args[0], args);
1188 exit(EXIT_FAILURE);
1189 }
1190
1191 void
1192 sigchld(int a) {
1193 int stat, ret;
1194
1195 if(waitpid(pid, &stat, 0) < 0)
1196 die("Waiting for pid %hd failed: %s\n", pid, strerror(errno));
1197
1198 ret = WIFEXITED(stat) ? WEXITSTATUS(stat) : EXIT_FAILURE;
1199 if (ret != EXIT_SUCCESS)
1200 die("child finished with error '%d'\n", stat);
1201 exit(EXIT_SUCCESS);
1202 }
1203
1204 void
1205 ttynew(void) {
1206 int m, s;
1207 struct winsize w = {term.row, term.col, 0, 0};
1208
1209 /* seems to work fine on linux, openbsd and freebsd */
1210 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1211 die("openpty failed: %s\n", strerror(errno));
1212
1213 switch(pid = fork()) {
1214 case -1:
1215 die("fork failed\n");
1216 break;
1217 case 0:
1218 setsid(); /* create a new process group */
1219 dup2(s, STDIN_FILENO);
1220 dup2(s, STDOUT_FILENO);
1221 dup2(s, STDERR_FILENO);
1222 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1223 die("ioctl TIOCSCTTY failed: %s\n", strerror(errno));
1224 close(s);
1225 close(m);
1226 execsh();
1227 break;
1228 default:
1229 close(s);
1230 cmdfd = m;
1231 signal(SIGCHLD, sigchld);
1232 if(opt_io) {
1233 term.mode |= MODE_PRINT;
1234 iofd = (!strcmp(opt_io, "-")) ?
1235 STDOUT_FILENO :
1236 open(opt_io, O_WRONLY | O_CREAT, 0666);
1237 if(iofd < 0) {
1238 fprintf(stderr, "Error opening %s:%s\n",
1239 opt_io, strerror(errno));
1240 }
1241 }
1242 break;
1243 }
1244 }
1245
1246 void
1247 ttyread(void) {
1248 static char buf[BUFSIZ];
1249 static int buflen = 0;
1250 char *ptr;
1251 char s[UTF_SIZ];
1252 int charsize; /* size of utf8 char in bytes */
1253 long unicodep;
1254 int ret;
1255
1256 /* append read bytes to unprocessed bytes */
1257 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1258 die("Couldn't read from shell: %s\n", strerror(errno));
1259
1260 /* process every complete utf8 char */
1261 buflen += ret;
1262 ptr = buf;
1263 while((charsize = utf8decode(ptr, &unicodep, buflen))) {
1264 utf8encode(unicodep, s, UTF_SIZ);
1265 tputc(s, charsize);
1266 ptr += charsize;
1267 buflen -= charsize;
1268 }
1269
1270 /* keep any uncomplete utf8 char for the next call */
1271 memmove(buf, ptr, buflen);
1272 }
1273
1274 void
1275 ttywrite(const char *s, size_t n) {
1276 if(xwrite(cmdfd, s, n) == -1)
1277 die("write error on tty: %s\n", strerror(errno));
1278 }
1279
1280 void
1281 ttysend(char *s, size_t n) {
1282 ttywrite(s, n);
1283 if(IS_SET(MODE_ECHO))
1284 techo(s, n);
1285 }
1286
1287 void
1288 ttyresize(void) {
1289 struct winsize w;
1290
1291 w.ws_row = term.row;
1292 w.ws_col = term.col;
1293 w.ws_xpixel = xw.tw;
1294 w.ws_ypixel = xw.th;
1295 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1296 fprintf(stderr, "Couldn't set window size: %s\n", strerror(errno));
1297 }
1298
1299 int
1300 tattrset(int attr) {
1301 int i, j;
1302
1303 for(i = 0; i < term.row-1; i++) {
1304 for(j = 0; j < term.col-1; j++) {
1305 if(term.line[i][j].mode & attr)
1306 return 1;
1307 }
1308 }
1309
1310 return 0;
1311 }
1312
1313 void
1314 tsetdirt(int top, int bot) {
1315 int i;
1316
1317 LIMIT(top, 0, term.row-1);
1318 LIMIT(bot, 0, term.row-1);
1319
1320 for(i = top; i <= bot; i++)
1321 term.dirty[i] = 1;
1322 }
1323
1324 void
1325 tsetdirtattr(int attr) {
1326 int i, j;
1327
1328 for(i = 0; i < term.row-1; i++) {
1329 for(j = 0; j < term.col-1; j++) {
1330 if(term.line[i][j].mode & attr) {
1331 tsetdirt(i, i);
1332 break;
1333 }
1334 }
1335 }
1336 }
1337
1338 void
1339 tfulldirt(void) {
1340 tsetdirt(0, term.row-1);
1341 }
1342
1343 void
1344 tcursor(int mode) {
1345 static TCursor c[2];
1346 bool alt = IS_SET(MODE_ALTSCREEN);
1347
1348 if(mode == CURSOR_SAVE) {
1349 c[alt] = term.c;
1350 } else if(mode == CURSOR_LOAD) {
1351 term.c = c[alt];
1352 tmoveto(c[alt].x, c[alt].y);
1353 }
1354 }
1355
1356 void
1357 treset(void) {
1358 uint i;
1359
1360 term.c = (TCursor){{
1361 .mode = ATTR_NULL,
1362 .fg = defaultfg,
1363 .bg = defaultbg
1364 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1365
1366 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1367 for(i = tabspaces; i < term.col; i += tabspaces)
1368 term.tabs[i] = 1;
1369 term.top = 0;
1370 term.bot = term.row - 1;
1371 term.mode = MODE_WRAP;
1372 memset(term.trantbl, sizeof(term.trantbl), CS_USA);
1373 term.charset = 0;
1374
1375 for(i = 0; i < 2; i++) {
1376 tmoveto(0, 0);
1377 tcursor(CURSOR_SAVE);
1378 tclearregion(0, 0, term.col-1, term.row-1);
1379 tswapscreen();
1380 }
1381 }
1382
1383 void
1384 tnew(int col, int row) {
1385 term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } };
1386 tresize(col, row);
1387 term.numlock = 1;
1388
1389 treset();
1390 }
1391
1392 void
1393 tswapscreen(void) {
1394 Line *tmp = term.line;
1395
1396 term.line = term.alt;
1397 term.alt = tmp;
1398 term.mode ^= MODE_ALTSCREEN;
1399 tfulldirt();
1400 }
1401
1402 void
1403 tscrolldown(int orig, int n) {
1404 int i;
1405 Line temp;
1406
1407 LIMIT(n, 0, term.bot-orig+1);
1408
1409 tsetdirt(orig, term.bot-n);
1410 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1411
1412 for(i = term.bot; i >= orig+n; i--) {
1413 temp = term.line[i];
1414 term.line[i] = term.line[i-n];
1415 term.line[i-n] = temp;
1416 }
1417
1418 selscroll(orig, n);
1419 }
1420
1421 void
1422 tscrollup(int orig, int n) {
1423 int i;
1424 Line temp;
1425
1426 LIMIT(n, 0, term.bot-orig+1);
1427
1428 tclearregion(0, orig, term.col-1, orig+n-1);
1429 tsetdirt(orig+n, term.bot);
1430
1431 for(i = orig; i <= term.bot-n; i++) {
1432 temp = term.line[i];
1433 term.line[i] = term.line[i+n];
1434 term.line[i+n] = temp;
1435 }
1436
1437 selscroll(orig, -n);
1438 }
1439
1440 void
1441 selscroll(int orig, int n) {
1442 if(sel.ob.x == -1)
1443 return;
1444
1445 if(BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
1446 if((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
1447 selclear(NULL);
1448 return;
1449 }
1450 if(sel.type == SEL_RECTANGULAR) {
1451 if(sel.ob.y < term.top)
1452 sel.ob.y = term.top;
1453 if(sel.oe.y > term.bot)
1454 sel.oe.y = term.bot;
1455 } else {
1456 if(sel.ob.y < term.top) {
1457 sel.ob.y = term.top;
1458 sel.ob.x = 0;
1459 }
1460 if(sel.oe.y > term.bot) {
1461 sel.oe.y = term.bot;
1462 sel.oe.x = term.col;
1463 }
1464 }
1465 selnormalize();
1466 }
1467 }
1468
1469 void
1470 tnewline(int first_col) {
1471 int y = term.c.y;
1472
1473 if(y == term.bot) {
1474 tscrollup(term.top, 1);
1475 } else {
1476 y++;
1477 }
1478 tmoveto(first_col ? 0 : term.c.x, y);
1479 }
1480
1481 void
1482 csiparse(void) {
1483 char *p = csiescseq.buf, *np;
1484 long int v;
1485
1486 csiescseq.narg = 0;
1487 if(*p == '?') {
1488 csiescseq.priv = 1;
1489 p++;
1490 }
1491
1492 csiescseq.buf[csiescseq.len] = '\0';
1493 while(p < csiescseq.buf+csiescseq.len) {
1494 np = NULL;
1495 v = strtol(p, &np, 10);
1496 if(np == p)
1497 v = 0;
1498 if(v == LONG_MAX || v == LONG_MIN)
1499 v = -1;
1500 csiescseq.arg[csiescseq.narg++] = v;
1501 p = np;
1502 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1503 break;
1504 p++;
1505 }
1506 csiescseq.mode = *p;
1507 }
1508
1509 /* for absolute user moves, when decom is set */
1510 void
1511 tmoveato(int x, int y) {
1512 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1513 }
1514
1515 void
1516 tmoveto(int x, int y) {
1517 int miny, maxy;
1518
1519 if(term.c.state & CURSOR_ORIGIN) {
1520 miny = term.top;
1521 maxy = term.bot;
1522 } else {
1523 miny = 0;
1524 maxy = term.row - 1;
1525 }
1526 LIMIT(x, 0, term.col-1);
1527 LIMIT(y, miny, maxy);
1528 term.c.state &= ~CURSOR_WRAPNEXT;
1529 term.c.x = x;
1530 term.c.y = y;
1531 }
1532
1533 void
1534 tsetchar(char *c, Glyph *attr, int x, int y) {
1535 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1536 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1537 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1538 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1539 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1540 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1541 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1542 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1543 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1544 };
1545
1546 /*
1547 * The table is proudly stolen from rxvt.
1548 */
1549 if(term.trantbl[term.charset] == CS_GRAPHIC0) {
1550 if(BETWEEN(c[0], 0x41, 0x7e) && vt100_0[c[0] - 0x41]) {
1551 c = vt100_0[c[0] - 0x41];
1552 }
1553 }
1554
1555 if(term.line[y][x].mode & ATTR_WIDE) {
1556 if(x+1 < term.col) {
1557 term.line[y][x+1].c[0] = ' ';
1558 term.line[y][x+1].mode &= ~ATTR_WDUMMY;
1559 }
1560 } else if(term.line[y][x].mode & ATTR_WDUMMY) {
1561 term.line[y][x-1].c[0] = ' ';
1562 term.line[y][x-1].mode &= ~ATTR_WIDE;
1563 }
1564
1565 term.dirty[y] = 1;
1566 term.line[y][x] = *attr;
1567 memcpy(term.line[y][x].c, c, UTF_SIZ);
1568 }
1569
1570 void
1571 tclearregion(int x1, int y1, int x2, int y2) {
1572 int x, y, temp;
1573 Glyph *gp;
1574
1575 if(x1 > x2)
1576 temp = x1, x1 = x2, x2 = temp;
1577 if(y1 > y2)
1578 temp = y1, y1 = y2, y2 = temp;
1579
1580 LIMIT(x1, 0, term.col-1);
1581 LIMIT(x2, 0, term.col-1);
1582 LIMIT(y1, 0, term.row-1);
1583 LIMIT(y2, 0, term.row-1);
1584
1585 for(y = y1; y <= y2; y++) {
1586 term.dirty[y] = 1;
1587 for(x = x1; x <= x2; x++) {
1588 gp = &term.line[y][x];
1589 if(selected(x, y))
1590 selclear(NULL);
1591 gp->fg = term.c.attr.fg;
1592 gp->bg = term.c.attr.bg;
1593 gp->mode = 0;
1594 memcpy(gp->c, " ", 2);
1595 }
1596 }
1597 }
1598
1599 void
1600 tdeletechar(int n) {
1601 int dst, src, size;
1602 Glyph *line;
1603
1604 LIMIT(n, 0, term.col - term.c.x);
1605
1606 dst = term.c.x;
1607 src = term.c.x + n;
1608 size = term.col - src;
1609 line = term.line[term.c.y];
1610
1611 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1612 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1613 }
1614
1615 void
1616 tinsertblank(int n) {
1617 int dst, src, size;
1618 Glyph *line;
1619
1620 LIMIT(n, 0, term.col - term.c.x);
1621
1622 dst = term.c.x + n;
1623 src = term.c.x;
1624 size = term.col - dst;
1625 line = term.line[term.c.y];
1626
1627 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1628 tclearregion(src, term.c.y, dst - 1, term.c.y);
1629 }
1630
1631 void
1632 tinsertblankline(int n) {
1633 if(BETWEEN(term.c.y, term.top, term.bot))
1634 tscrolldown(term.c.y, n);
1635 }
1636
1637 void
1638 tdeleteline(int n) {
1639 if(BETWEEN(term.c.y, term.top, term.bot))
1640 tscrollup(term.c.y, n);
1641 }
1642
1643 int32_t
1644 tdefcolor(int *attr, int *npar, int l) {
1645 int32_t idx = -1;
1646 uint r, g, b;
1647
1648 switch (attr[*npar + 1]) {
1649 case 2: /* direct color in RGB space */
1650 if (*npar + 4 >= l) {
1651 fprintf(stderr,
1652 "erresc(38): Incorrect number of parameters (%d)\n",
1653 *npar);
1654 break;
1655 }
1656 r = attr[*npar + 2];
1657 g = attr[*npar + 3];
1658 b = attr[*npar + 4];
1659 *npar += 4;
1660 if(!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
1661 fprintf(stderr, "erresc: bad rgb color (%d,%d,%d)\n",
1662 r, g, b);
1663 else
1664 idx = TRUECOLOR(r, g, b);
1665 break;
1666 case 5: /* indexed color */
1667 if (*npar + 2 >= l) {
1668 fprintf(stderr,
1669 "erresc(38): Incorrect number of parameters (%d)\n",
1670 *npar);
1671 break;
1672 }
1673 *npar += 2;
1674 if(!BETWEEN(attr[*npar], 0, 255))
1675 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
1676 else
1677 idx = attr[*npar];
1678 break;
1679 case 0: /* implemented defined (only foreground) */
1680 case 1: /* transparent */
1681 case 3: /* direct color in CMY space */
1682 case 4: /* direct color in CMYK space */
1683 default:
1684 fprintf(stderr,
1685 "erresc(38): gfx attr %d unknown\n", attr[*npar]);
1686 break;
1687 }
1688
1689 return idx;
1690 }
1691
1692 void
1693 tsetattr(int *attr, int l) {
1694 int i;
1695 int32_t idx;
1696
1697 for(i = 0; i < l; i++) {
1698 switch(attr[i]) {
1699 case 0:
1700 term.c.attr.mode &= ~(
1701 ATTR_BOLD |
1702 ATTR_FAINT |
1703 ATTR_ITALIC |
1704 ATTR_UNDERLINE |
1705 ATTR_BLINK |
1706 ATTR_REVERSE |
1707 ATTR_INVISIBLE |
1708 ATTR_STRUCK );
1709 term.c.attr.fg = defaultfg;
1710 term.c.attr.bg = defaultbg;
1711 break;
1712 case 1:
1713 term.c.attr.mode |= ATTR_BOLD;
1714 break;
1715 case 2:
1716 term.c.attr.mode |= ATTR_FAINT;
1717 break;
1718 case 3:
1719 term.c.attr.mode |= ATTR_ITALIC;
1720 break;
1721 case 4:
1722 term.c.attr.mode |= ATTR_UNDERLINE;
1723 break;
1724 case 5: /* slow blink */
1725 /* FALLTHROUGH */
1726 case 6: /* rapid blink */
1727 term.c.attr.mode |= ATTR_BLINK;
1728 break;
1729 case 7:
1730 term.c.attr.mode |= ATTR_REVERSE;
1731 break;
1732 case 8:
1733 term.c.attr.mode |= ATTR_INVISIBLE;
1734 break;
1735 case 9:
1736 term.c.attr.mode |= ATTR_STRUCK;
1737 break;
1738 case 22:
1739 term.c.attr.mode &= ~(ATTR_BOLD | ATTR_FAINT);
1740 break;
1741 case 23:
1742 term.c.attr.mode &= ~ATTR_ITALIC;
1743 break;
1744 case 24:
1745 term.c.attr.mode &= ~ATTR_UNDERLINE;
1746 break;
1747 case 25:
1748 term.c.attr.mode &= ~ATTR_BLINK;
1749 break;
1750 case 27:
1751 term.c.attr.mode &= ~ATTR_REVERSE;
1752 break;
1753 case 28:
1754 term.c.attr.mode &= ~ATTR_INVISIBLE;
1755 break;
1756 case 29:
1757 term.c.attr.mode &= ~ATTR_STRUCK;
1758 break;
1759 case 38:
1760 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1761 term.c.attr.fg = idx;
1762 break;
1763 case 39:
1764 term.c.attr.fg = defaultfg;
1765 break;
1766 case 48:
1767 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1768 term.c.attr.bg = idx;
1769 break;
1770 case 49:
1771 term.c.attr.bg = defaultbg;
1772 break;
1773 default:
1774 if(BETWEEN(attr[i], 30, 37)) {
1775 term.c.attr.fg = attr[i] - 30;
1776 } else if(BETWEEN(attr[i], 40, 47)) {
1777 term.c.attr.bg = attr[i] - 40;
1778 } else if(BETWEEN(attr[i], 90, 97)) {
1779 term.c.attr.fg = attr[i] - 90 + 8;
1780 } else if(BETWEEN(attr[i], 100, 107)) {
1781 term.c.attr.bg = attr[i] - 100 + 8;
1782 } else {
1783 fprintf(stderr,
1784 "erresc(default): gfx attr %d unknown\n",
1785 attr[i]), csidump();
1786 }
1787 break;
1788 }
1789 }
1790 }
1791
1792 void
1793 tsetscroll(int t, int b) {
1794 int temp;
1795
1796 LIMIT(t, 0, term.row-1);
1797 LIMIT(b, 0, term.row-1);
1798 if(t > b) {
1799 temp = t;
1800 t = b;
1801 b = temp;
1802 }
1803 term.top = t;
1804 term.bot = b;
1805 }
1806
1807 void
1808 tsetmode(bool priv, bool set, int *args, int narg) {
1809 int *lim, mode;
1810 bool alt;
1811
1812 for(lim = args + narg; args < lim; ++args) {
1813 if(priv) {
1814 switch(*args) {
1815 case 1: /* DECCKM -- Cursor key */
1816 MODBIT(term.mode, set, MODE_APPCURSOR);
1817 break;
1818 case 5: /* DECSCNM -- Reverse video */
1819 mode = term.mode;
1820 MODBIT(term.mode, set, MODE_REVERSE);
1821 if(mode != term.mode)
1822 redraw(REDRAW_TIMEOUT);
1823 break;
1824 case 6: /* DECOM -- Origin */
1825 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1826 tmoveato(0, 0);
1827 break;
1828 case 7: /* DECAWM -- Auto wrap */
1829 MODBIT(term.mode, set, MODE_WRAP);
1830 break;
1831 case 0: /* Error (IGNORED) */
1832 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1833 case 3: /* DECCOLM -- Column (IGNORED) */
1834 case 4: /* DECSCLM -- Scroll (IGNORED) */
1835 case 8: /* DECARM -- Auto repeat (IGNORED) */
1836 case 18: /* DECPFF -- Printer feed (IGNORED) */
1837 case 19: /* DECPEX -- Printer extent (IGNORED) */
1838 case 42: /* DECNRCM -- National characters (IGNORED) */
1839 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1840 break;
1841 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1842 MODBIT(term.mode, !set, MODE_HIDE);
1843 break;
1844 case 9: /* X10 mouse compatibility mode */
1845 xsetpointermotion(0);
1846 MODBIT(term.mode, 0, MODE_MOUSE);
1847 MODBIT(term.mode, set, MODE_MOUSEX10);
1848 break;
1849 case 1000: /* 1000: report button press */
1850 xsetpointermotion(0);
1851 MODBIT(term.mode, 0, MODE_MOUSE);
1852 MODBIT(term.mode, set, MODE_MOUSEBTN);
1853 break;
1854 case 1002: /* 1002: report motion on button press */
1855 xsetpointermotion(0);
1856 MODBIT(term.mode, 0, MODE_MOUSE);
1857 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1858 break;
1859 case 1003: /* 1003: enable all mouse motions */
1860 xsetpointermotion(set);
1861 MODBIT(term.mode, 0, MODE_MOUSE);
1862 MODBIT(term.mode, set, MODE_MOUSEMANY);
1863 break;
1864 case 1004: /* 1004: send focus events to tty */
1865 MODBIT(term.mode, set, MODE_FOCUS);
1866 break;
1867 case 1006: /* 1006: extended reporting mode */
1868 MODBIT(term.mode, set, MODE_MOUSESGR);
1869 break;
1870 case 1034:
1871 MODBIT(term.mode, set, MODE_8BIT);
1872 break;
1873 case 1049: /* swap screen & set/restore cursor as xterm */
1874 if (!allowaltscreen)
1875 break;
1876 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1877 /* FALLTHROUGH */
1878 case 47: /* swap screen */
1879 case 1047:
1880 if (!allowaltscreen)
1881 break;
1882 alt = IS_SET(MODE_ALTSCREEN);
1883 if(alt) {
1884 tclearregion(0, 0, term.col-1,
1885 term.row-1);
1886 }
1887 if(set ^ alt) /* set is always 1 or 0 */
1888 tswapscreen();
1889 if(*args != 1049)
1890 break;
1891 /* FALLTHROUGH */
1892 case 1048:
1893 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1894 break;
1895 case 2004: /* 2004: bracketed paste mode */
1896 MODBIT(term.mode, set, MODE_BRCKTPASTE);
1897 break;
1898 /* Not implemented mouse modes. See comments there. */
1899 case 1001: /* mouse highlight mode; can hang the
1900 terminal by design when implemented. */
1901 case 1005: /* UTF-8 mouse mode; will confuse
1902 applications not supporting UTF-8
1903 and luit. */
1904 case 1015: /* urxvt mangled mouse mode; incompatible
1905 and can be mistaken for other control
1906 codes. */
1907 default:
1908 fprintf(stderr,
1909 "erresc: unknown private set/reset mode %d\n",
1910 *args);
1911 break;
1912 }
1913 } else {
1914 switch(*args) {
1915 case 0: /* Error (IGNORED) */
1916 break;
1917 case 2: /* KAM -- keyboard action */
1918 MODBIT(term.mode, set, MODE_KBDLOCK);
1919 break;
1920 case 4: /* IRM -- Insertion-replacement */
1921 MODBIT(term.mode, set, MODE_INSERT);
1922 break;
1923 case 12: /* SRM -- Send/Receive */
1924 MODBIT(term.mode, !set, MODE_ECHO);
1925 break;
1926 case 20: /* LNM -- Linefeed/new line */
1927 MODBIT(term.mode, set, MODE_CRLF);
1928 break;
1929 default:
1930 fprintf(stderr,
1931 "erresc: unknown set/reset mode %d\n",
1932 *args);
1933 break;
1934 }
1935 }
1936 }
1937 }
1938
1939 void
1940 csihandle(void) {
1941 char buf[40];
1942 int len;
1943
1944 switch(csiescseq.mode) {
1945 default:
1946 unknown:
1947 fprintf(stderr, "erresc: unknown csi ");
1948 csidump();
1949 /* die(""); */
1950 break;
1951 case '@': /* ICH -- Insert <n> blank char */
1952 DEFAULT(csiescseq.arg[0], 1);
1953 tinsertblank(csiescseq.arg[0]);
1954 break;
1955 case 'A': /* CUU -- Cursor <n> Up */
1956 DEFAULT(csiescseq.arg[0], 1);
1957 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1958 break;
1959 case 'B': /* CUD -- Cursor <n> Down */
1960 case 'e': /* VPR --Cursor <n> Down */
1961 DEFAULT(csiescseq.arg[0], 1);
1962 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1963 break;
1964 case 'i': /* MC -- Media Copy */
1965 switch(csiescseq.arg[0]) {
1966 case 0:
1967 tdump();
1968 break;
1969 case 1:
1970 tdumpline(term.c.y);
1971 break;
1972 case 2:
1973 tdumpsel();
1974 break;
1975 case 4:
1976 term.mode &= ~MODE_PRINT;
1977 break;
1978 case 5:
1979 term.mode |= MODE_PRINT;
1980 break;
1981 }
1982 break;
1983 case 'c': /* DA -- Device Attributes */
1984 if(csiescseq.arg[0] == 0)
1985 ttywrite(vtiden, sizeof(vtiden) - 1);
1986 break;
1987 case 'C': /* CUF -- Cursor <n> Forward */
1988 case 'a': /* HPR -- Cursor <n> Forward */
1989 DEFAULT(csiescseq.arg[0], 1);
1990 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1991 break;
1992 case 'D': /* CUB -- Cursor <n> Backward */
1993 DEFAULT(csiescseq.arg[0], 1);
1994 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1995 break;
1996 case 'E': /* CNL -- Cursor <n> Down and first col */
1997 DEFAULT(csiescseq.arg[0], 1);
1998 tmoveto(0, term.c.y+csiescseq.arg[0]);
1999 break;
2000 case 'F': /* CPL -- Cursor <n> Up and first col */
2001 DEFAULT(csiescseq.arg[0], 1);
2002 tmoveto(0, term.c.y-csiescseq.arg[0]);
2003 break;
2004 case 'g': /* TBC -- Tabulation clear */
2005 switch(csiescseq.arg[0]) {
2006 case 0: /* clear current tab stop */
2007 term.tabs[term.c.x] = 0;
2008 break;
2009 case 3: /* clear all the tabs */
2010 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
2011 break;
2012 default:
2013 goto unknown;
2014 }
2015 break;
2016 case 'G': /* CHA -- Move to <col> */
2017 case '`': /* HPA */
2018 DEFAULT(csiescseq.arg[0], 1);
2019 tmoveto(csiescseq.arg[0]-1, term.c.y);
2020 break;
2021 case 'H': /* CUP -- Move to <row> <col> */
2022 case 'f': /* HVP */
2023 DEFAULT(csiescseq.arg[0], 1);
2024 DEFAULT(csiescseq.arg[1], 1);
2025 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
2026 break;
2027 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
2028 DEFAULT(csiescseq.arg[0], 1);
2029 tputtab(csiescseq.arg[0]);
2030 break;
2031 case 'J': /* ED -- Clear screen */
2032 selclear(NULL);
2033 switch(csiescseq.arg[0]) {
2034 case 0: /* below */
2035 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
2036 if(term.c.y < term.row-1) {
2037 tclearregion(0, term.c.y+1, term.col-1,
2038 term.row-1);
2039 }
2040 break;
2041 case 1: /* above */
2042 if(term.c.y > 1)
2043 tclearregion(0, 0, term.col-1, term.c.y-1);
2044 tclearregion(0, term.c.y, term.c.x, term.c.y);
2045 break;
2046 case 2: /* all */
2047 tclearregion(0, 0, term.col-1, term.row-1);
2048 break;
2049 default:
2050 goto unknown;
2051 }
2052 break;
2053 case 'K': /* EL -- Clear line */
2054 switch(csiescseq.arg[0]) {
2055 case 0: /* right */
2056 tclearregion(term.c.x, term.c.y, term.col-1,
2057 term.c.y);
2058 break;
2059 case 1: /* left */
2060 tclearregion(0, term.c.y, term.c.x, term.c.y);
2061 break;
2062 case 2: /* all */
2063 tclearregion(0, term.c.y, term.col-1, term.c.y);
2064 break;
2065 }
2066 break;
2067 case 'S': /* SU -- Scroll <n> line up */
2068 DEFAULT(csiescseq.arg[0], 1);
2069 tscrollup(term.top, csiescseq.arg[0]);
2070 break;
2071 case 'T': /* SD -- Scroll <n> line down */
2072 DEFAULT(csiescseq.arg[0], 1);
2073 tscrolldown(term.top, csiescseq.arg[0]);
2074 break;
2075 case 'L': /* IL -- Insert <n> blank lines */
2076 DEFAULT(csiescseq.arg[0], 1);
2077 tinsertblankline(csiescseq.arg[0]);
2078 break;
2079 case 'l': /* RM -- Reset Mode */
2080 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
2081 break;
2082 case 'M': /* DL -- Delete <n> lines */
2083 DEFAULT(csiescseq.arg[0], 1);
2084 tdeleteline(csiescseq.arg[0]);
2085 break;
2086 case 'X': /* ECH -- Erase <n> char */
2087 DEFAULT(csiescseq.arg[0], 1);
2088 tclearregion(term.c.x, term.c.y,
2089 term.c.x + csiescseq.arg[0] - 1, term.c.y);
2090 break;
2091 case 'P': /* DCH -- Delete <n> char */
2092 DEFAULT(csiescseq.arg[0], 1);
2093 tdeletechar(csiescseq.arg[0]);
2094 break;
2095 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
2096 DEFAULT(csiescseq.arg[0], 1);
2097 tputtab(-csiescseq.arg[0]);
2098 break;
2099 case 'd': /* VPA -- Move to <row> */
2100 DEFAULT(csiescseq.arg[0], 1);
2101 tmoveato(term.c.x, csiescseq.arg[0]-1);
2102 break;
2103 case 'h': /* SM -- Set terminal mode */
2104 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
2105 break;
2106 case 'm': /* SGR -- Terminal attribute (color) */
2107 tsetattr(csiescseq.arg, csiescseq.narg);
2108 break;
2109 case 'n': /* DSR – Device Status Report (cursor position) */
2110 if (csiescseq.arg[0] == 6) {
2111 len = snprintf(buf, sizeof(buf),"\033[%i;%iR",
2112 term.c.y+1, term.c.x+1);
2113 ttywrite(buf, len);
2114 }
2115 break;
2116 case 'r': /* DECSTBM -- Set Scrolling Region */
2117 if(csiescseq.priv) {
2118 goto unknown;
2119 } else {
2120 DEFAULT(csiescseq.arg[0], 1);
2121 DEFAULT(csiescseq.arg[1], term.row);
2122 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
2123 tmoveato(0, 0);
2124 }
2125 break;
2126 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
2127 tcursor(CURSOR_SAVE);
2128 break;
2129 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
2130 tcursor(CURSOR_LOAD);
2131 break;
2132 }
2133 }
2134
2135 void
2136 csidump(void) {
2137 int i;
2138 uint c;
2139
2140 printf("ESC[");
2141 for(i = 0; i < csiescseq.len; i++) {
2142 c = csiescseq.buf[i] & 0xff;
2143 if(isprint(c)) {
2144 putchar(c);
2145 } else if(c == '\n') {
2146 printf("(\\n)");
2147 } else if(c == '\r') {
2148 printf("(\\r)");
2149 } else if(c == 0x1b) {
2150 printf("(\\e)");
2151 } else {
2152 printf("(%02x)", c);
2153 }
2154 }
2155 putchar('\n');
2156 }
2157
2158 void
2159 csireset(void) {
2160 memset(&csiescseq, 0, sizeof(csiescseq));
2161 }
2162
2163 void
2164 strhandle(void) {
2165 char *p = NULL;
2166 int j, narg, par;
2167
2168 term.esc &= ~(ESC_STR_END|ESC_STR);
2169 strparse();
2170 narg = strescseq.narg;
2171 par = atoi(strescseq.args[0]);
2172
2173 switch(strescseq.type) {
2174 case ']': /* OSC -- Operating System Command */
2175 switch(par) {
2176 case 0:
2177 case 1:
2178 case 2:
2179 if(narg > 1)
2180 xsettitle(strescseq.args[1]);
2181 return;
2182 case 4: /* color set */
2183 if(narg < 3)
2184 break;
2185 p = strescseq.args[2];
2186 /* FALLTHROUGH */
2187 case 104: /* color reset, here p = NULL */
2188 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2189 if(xsetcolorname(j, p)) {
2190 fprintf(stderr, "erresc: invalid color %s\n", p);
2191 } else {
2192 /*
2193 * TODO if defaultbg color is changed, borders
2194 * are dirty
2195 */
2196 redraw(0);
2197 }
2198 return;
2199 }
2200 break;
2201 case 'k': /* old title set compatibility */
2202 xsettitle(strescseq.args[0]);
2203 return;
2204 case 'P': /* DCS -- Device Control String */
2205 case '_': /* APC -- Application Program Command */
2206 case '^': /* PM -- Privacy Message */
2207 return;
2208 }
2209
2210 fprintf(stderr, "erresc: unknown str ");
2211 strdump();
2212 }
2213
2214 void
2215 strparse(void) {
2216 char *p = strescseq.buf;
2217
2218 strescseq.narg = 0;
2219 strescseq.buf[strescseq.len] = '\0';
2220 while(p && strescseq.narg < STR_ARG_SIZ)
2221 strescseq.args[strescseq.narg++] = strsep(&p, ";");
2222 }
2223
2224 void
2225 strdump(void) {
2226 int i;
2227 uint c;
2228
2229 printf("ESC%c", strescseq.type);
2230 for(i = 0; i < strescseq.len; i++) {
2231 c = strescseq.buf[i] & 0xff;
2232 if(c == '\0') {
2233 return;
2234 } else if(isprint(c)) {
2235 putchar(c);
2236 } else if(c == '\n') {
2237 printf("(\\n)");
2238 } else if(c == '\r') {
2239 printf("(\\r)");
2240 } else if(c == 0x1b) {
2241 printf("(\\e)");
2242 } else {
2243 printf("(%02x)", c);
2244 }
2245 }
2246 printf("ESC\\\n");
2247 }
2248
2249 void
2250 strreset(void) {
2251 memset(&strescseq, 0, sizeof(strescseq));
2252 }
2253
2254 void
2255 tprinter(char *s, size_t len) {
2256 if(iofd != -1 && xwrite(iofd, s, len) < 0) {
2257 fprintf(stderr, "Error writing in %s:%s\n",
2258 opt_io, strerror(errno));
2259 close(iofd);
2260 iofd = -1;
2261 }
2262 }
2263
2264 void
2265 toggleprinter(const Arg *arg) {
2266 term.mode ^= MODE_PRINT;
2267 }
2268
2269 void
2270 printscreen(const Arg *arg) {
2271 tdump();
2272 }
2273
2274 void
2275 printsel(const Arg *arg) {
2276 tdumpsel();
2277 }
2278
2279 void
2280 tdumpsel(void) {
2281 char *ptr;
2282
2283 if((ptr = getsel())) {
2284 tprinter(ptr, strlen(ptr));
2285 free(ptr);
2286 }
2287 }
2288
2289 void
2290 tdumpline(int n) {
2291 Glyph *bp, *end;
2292
2293 bp = &term.line[n][0];
2294 end = &bp[MIN(tlinelen(n), term.col) - 1];
2295 if(bp != end || bp->c[0] != ' ') {
2296 for( ;bp <= end; ++bp)
2297 tprinter(bp->c, utf8len(bp->c));
2298 }
2299 tprinter("\n", 1);
2300 }
2301
2302 void
2303 tdump(void) {
2304 int i;
2305
2306 for(i = 0; i < term.row; ++i)
2307 tdumpline(i);
2308 }
2309
2310 void
2311 tputtab(int n) {
2312 uint x = term.c.x;
2313
2314 if(n > 0) {
2315 while(x < term.col && n--)
2316 for(++x; x < term.col && !term.tabs[x]; ++x)
2317 /* nothing */ ;
2318 } else if(n < 0) {
2319 while(x > 0 && n++)
2320 for(--x; x > 0 && !term.tabs[x]; --x)
2321 /* nothing */ ;
2322 }
2323 tmoveto(x, term.c.y);
2324 }
2325
2326 void
2327 techo(char *buf, int len) {
2328 for(; len > 0; buf++, len--) {
2329 char c = *buf;
2330
2331 if(ISCONTROL((uchar) c)) { /* control code */
2332 if(c & 0x80) {
2333 c &= 0x7f;
2334 tputc("^", 1);
2335 tputc("[", 1);
2336 } else if(c != '\n' && c != '\r' && c != '\t') {
2337 c ^= 0x40;
2338 tputc("^", 1);
2339 }
2340 tputc(&c, 1);
2341 } else {
2342 break;
2343 }
2344 }
2345 if(len)
2346 tputc(buf, len);
2347 }
2348
2349 void
2350 tdeftran(char ascii) {
2351 static char cs[] = "0B";
2352 static int vcs[] = {CS_GRAPHIC0, CS_USA};
2353 char *p;
2354
2355 if((p = strchr(cs, ascii)) == NULL) {
2356 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2357 } else {
2358 term.trantbl[term.icharset] = vcs[p - cs];
2359 }
2360 }
2361
2362 void
2363 tdectest(char c) {
2364 static char E[UTF_SIZ] = "E";
2365 int x, y;
2366
2367 if(c == '8') { /* DEC screen alignment test. */
2368 for(x = 0; x < term.col; ++x) {
2369 for(y = 0; y < term.row; ++y)
2370 tsetchar(E, &term.c.attr, x, y);
2371 }
2372 }
2373 }
2374
2375 void
2376 tstrsequence(uchar c) {
2377 if (c & 0x80) {
2378 switch (c) {
2379 case 0x90: /* DCS -- Device Control String */
2380 c = 'P';
2381 break;
2382 case 0x9f: /* APC -- Application Program Command */
2383 c = '_';
2384 break;
2385 case 0x9e: /* PM -- Privacy Message */
2386 c = '^';
2387 break;
2388 case 0x9d: /* OSC -- Operating System Command */
2389 c = ']';
2390 break;
2391 }
2392 }
2393 strreset();
2394 strescseq.type = c;
2395 term.esc |= ESC_STR;
2396 return;
2397 }
2398
2399 void
2400 tcontrolcode(uchar ascii) {
2401 static char question[UTF_SIZ] = "?";
2402
2403 switch(ascii) {
2404 case '\t': /* HT */
2405 tputtab(1);
2406 return;
2407 case '\b': /* BS */
2408 tmoveto(term.c.x-1, term.c.y);
2409 return;
2410 case '\r': /* CR */
2411 tmoveto(0, term.c.y);
2412 return;
2413 case '\f': /* LF */
2414 case '\v': /* VT */
2415 case '\n': /* LF */
2416 /* go to first col if the mode is set */
2417 tnewline(IS_SET(MODE_CRLF));
2418 return;
2419 case '\a': /* BEL */
2420 if(term.esc & ESC_STR_END) {
2421 /* backwards compatibility to xterm */
2422 strhandle();
2423 } else {
2424 if(!(xw.state & WIN_FOCUSED))
2425 xseturgency(1);
2426 if (bellvolume)
2427 XkbBell(xw.dpy, xw.win, bellvolume, (Atom)NULL);
2428 }
2429 break;
2430 case '\033': /* ESC */
2431 csireset();
2432 term.esc &= ~(ESC_CSI|ESC_ALTCHARSET|ESC_TEST);
2433 term.esc |= ESC_START;
2434 return;
2435 case '\016': /* SO (LS1 -- Locking shift 1) */
2436 case '\017': /* SI (LS0 -- Locking shift 0) */
2437 term.charset = 1 - (ascii - '\016');
2438 return;
2439 case '\032': /* SUB */
2440 tsetchar(question, &term.c.attr, term.c.x, term.c.y);
2441 case '\030': /* CAN */
2442 csireset();
2443 break;
2444 case '\005': /* ENQ (IGNORED) */
2445 case '\000': /* NUL (IGNORED) */
2446 case '\021': /* XON (IGNORED) */
2447 case '\023': /* XOFF (IGNORED) */
2448 case 0177: /* DEL (IGNORED) */
2449 return;
2450 case 0x84: /* TODO: IND */
2451 break;
2452 case 0x85: /* NEL -- Next line */
2453 tnewline(1); /* always go to first col */
2454 break;
2455 case 0x88: /* HTS -- Horizontal tab stop */
2456 term.tabs[term.c.x] = 1;
2457 break;
2458 case 0x8d: /* TODO: RI */
2459 case 0x8e: /* TODO: SS2 */
2460 case 0x8f: /* TODO: SS3 */
2461 case 0x98: /* TODO: SOS */
2462 break;
2463 case 0x9a: /* DECID -- Identify Terminal */
2464 ttywrite(vtiden, sizeof(vtiden) - 1);
2465 break;
2466 case 0x9b: /* TODO: CSI */
2467 case 0x9c: /* TODO: ST */
2468 break;
2469 case 0x90: /* DCS -- Device Control String */
2470 case 0x9f: /* APC -- Application Program Command */
2471 case 0x9e: /* PM -- Privacy Message */
2472 case 0x9d: /* OSC -- Operating System Command */
2473 tstrsequence(ascii);
2474 return;
2475 }
2476 /* only CAN, SUB, \a and C1 chars interrupt a sequence */
2477 term.esc &= ~(ESC_STR_END|ESC_STR);
2478 return;
2479 }
2480
2481 /*
2482 * returns 1 when the sequence is finished and it hasn't to read
2483 * more characters for this sequence, otherwise 0
2484 */
2485 int
2486 eschandle(uchar ascii) {
2487 switch(ascii) {
2488 case '[':
2489 term.esc |= ESC_CSI;
2490 return 0;
2491 case '#':
2492 term.esc |= ESC_TEST;
2493 return 0;
2494 case 'P': /* DCS -- Device Control String */
2495 case '_': /* APC -- Application Program Command */
2496 case '^': /* PM -- Privacy Message */
2497 case ']': /* OSC -- Operating System Command */
2498 case 'k': /* old title set compatibility */
2499 tstrsequence(ascii);
2500 return 0;
2501 case 'n': /* LS2 -- Locking shift 2 */
2502 case 'o': /* LS3 -- Locking shift 3 */
2503 term.charset = 2 + (ascii - 'n');
2504 break;
2505 case '(': /* GZD4 -- set primary charset G0 */
2506 case ')': /* G1D4 -- set secondary charset G1 */
2507 case '*': /* G2D4 -- set tertiary charset G2 */
2508 case '+': /* G3D4 -- set quaternary charset G3 */
2509 term.icharset = ascii - '(';
2510 term.esc |= ESC_ALTCHARSET;
2511 return 0;
2512 case 'D': /* IND -- Linefeed */
2513 if(term.c.y == term.bot) {
2514 tscrollup(term.top, 1);
2515 } else {
2516 tmoveto(term.c.x, term.c.y+1);
2517 }
2518 break;
2519 case 'E': /* NEL -- Next line */
2520 tnewline(1); /* always go to first col */
2521 break;
2522 case 'H': /* HTS -- Horizontal tab stop */
2523 term.tabs[term.c.x] = 1;
2524 break;
2525 case 'M': /* RI -- Reverse index */
2526 if(term.c.y == term.top) {
2527 tscrolldown(term.top, 1);
2528 } else {
2529 tmoveto(term.c.x, term.c.y-1);
2530 }
2531 break;
2532 case 'Z': /* DECID -- Identify Terminal */
2533 ttywrite(vtiden, sizeof(vtiden) - 1);
2534 break;
2535 case 'c': /* RIS -- Reset to inital state */
2536 treset();
2537 xresettitle();
2538 xloadcols();
2539 break;
2540 case '=': /* DECPAM -- Application keypad */
2541 term.mode |= MODE_APPKEYPAD;
2542 break;
2543 case '>': /* DECPNM -- Normal keypad */
2544 term.mode &= ~MODE_APPKEYPAD;
2545 break;
2546 case '7': /* DECSC -- Save Cursor */
2547 tcursor(CURSOR_SAVE);
2548 break;
2549 case '8': /* DECRC -- Restore Cursor */
2550 tcursor(CURSOR_LOAD);
2551 break;
2552 case '\\': /* ST -- String Terminator */
2553 if(term.esc & ESC_STR_END)
2554 strhandle();
2555 break;
2556 default:
2557 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2558 (uchar) ascii, isprint(ascii)? ascii:'.');
2559 break;
2560 }
2561 return 1;
2562 }
2563
2564 void
2565 tputc(char *c, int len) {
2566 uchar ascii;
2567 bool control;
2568 long unicodep;
2569 int width;
2570 Glyph *gp;
2571
2572 if(len == 1) {
2573 width = 1;
2574 unicodep = ascii = *c;
2575 } else {
2576 utf8decode(c, &unicodep, UTF_SIZ);
2577 width = wcwidth(unicodep);
2578 control = ISCONTROLC1(unicodep);
2579 ascii = unicodep;
2580 }
2581
2582 if(IS_SET(MODE_PRINT))
2583 tprinter(c, len);
2584 control = ISCONTROL(unicodep);
2585
2586 /*
2587 * STR sequence must be checked before anything else
2588 * because it uses all following characters until it
2589 * receives a ESC, a SUB, a ST or any other C1 control
2590 * character.
2591 */
2592 if(term.esc & ESC_STR) {
2593 if(width == 1 &&
2594 (ascii == '\a' || ascii == 030 ||
2595 ascii == 032 || ascii == 033 ||
2596 ISCONTROLC1(unicodep))) {
2597 term.esc &= ~(ESC_START|ESC_STR);
2598 term.esc |= ESC_STR_END;
2599 } else if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2600 memmove(&strescseq.buf[strescseq.len], c, len);
2601 strescseq.len += len;
2602 return;
2603 } else {
2604 /*
2605 * Here is a bug in terminals. If the user never sends
2606 * some code to stop the str or esc command, then st
2607 * will stop responding. But this is better than
2608 * silently failing with unknown characters. At least
2609 * then users will report back.
2610 *
2611 * In the case users ever get fixed, here is the code:
2612 */
2613 /*
2614 * term.esc = 0;
2615 * strhandle();
2616 */
2617 return;
2618 }
2619 }
2620
2621 /*
2622 * Actions of control codes must be performed as soon they arrive
2623 * because they can be embedded inside a control sequence, and
2624 * they must not cause conflicts with sequences.
2625 */
2626 if(control) {
2627 tcontrolcode(ascii);
2628 /*
2629 * control codes are not shown ever
2630 */
2631 return;
2632 } else if(term.esc & ESC_START) {
2633 if(term.esc & ESC_CSI) {
2634 csiescseq.buf[csiescseq.len++] = ascii;
2635 if(BETWEEN(ascii, 0x40, 0x7E)
2636 || csiescseq.len >= \
2637 sizeof(csiescseq.buf)-1) {
2638 term.esc = 0;
2639 csiparse();
2640 csihandle();
2641 }
2642 return;
2643 } else if(term.esc & ESC_ALTCHARSET) {
2644 tdeftran(ascii);
2645 } else if(term.esc & ESC_TEST) {
2646 tdectest(ascii);
2647 } else {
2648 if (!eschandle(ascii))
2649 return;
2650 /* sequence already finished */
2651 }
2652 term.esc = 0;
2653 /*
2654 * All characters which form part of a sequence are not
2655 * printed
2656 */
2657 return;
2658 }
2659 if(sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
2660 selclear(NULL);
2661
2662 gp = &term.line[term.c.y][term.c.x];
2663 if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2664 gp->mode |= ATTR_WRAP;
2665 tnewline(1);
2666 }
2667
2668 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col)
2669 memmove(gp+1, gp, (term.col - term.c.x - 1) * sizeof(Glyph));
2670
2671 if(term.c.x+width > term.col)
2672 tnewline(1);
2673
2674 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2675
2676 if(width == 2) {
2677 gp->mode |= ATTR_WIDE;
2678 if(term.c.x+1 < term.col) {
2679 gp[1].c[0] = '\0';
2680 gp[1].mode = ATTR_WDUMMY;
2681 }
2682 }
2683 if(term.c.x+width < term.col) {
2684 tmoveto(term.c.x+width, term.c.y);
2685 } else {
2686 term.c.state |= CURSOR_WRAPNEXT;
2687 }
2688 }
2689
2690 void
2691 tresize(int col, int row) {
2692 int i;
2693 int minrow = MIN(row, term.row);
2694 int mincol = MIN(col, term.col);
2695 int slide = term.c.y - row + 1;
2696 bool *bp;
2697 TCursor c;
2698
2699 if(col < 1 || row < 1) {
2700 fprintf(stderr,
2701 "tresize: error resizing to %dx%d\n", col, row);
2702 return;
2703 }
2704
2705 /* free unneeded rows */
2706 i = 0;
2707 if(slide > 0) {
2708 /*
2709 * slide screen to keep cursor where we expect it -
2710 * tscrollup would work here, but we can optimize to
2711 * memmove because we're freeing the earlier lines
2712 */
2713 for(/* i = 0 */; i < slide; i++) {
2714 free(term.line[i]);
2715 free(term.alt[i]);
2716 }
2717 memmove(term.line, term.line + slide, row * sizeof(Line));
2718 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2719 }
2720 for(i += row; i < term.row; i++) {
2721 free(term.line[i]);
2722 free(term.alt[i]);
2723 }
2724
2725 /* resize to new height */
2726 term.line = xrealloc(term.line, row * sizeof(Line));
2727 term.alt = xrealloc(term.alt, row * sizeof(Line));
2728 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2729 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2730
2731 /* resize each row to new width, zero-pad if needed */
2732 for(i = 0; i < minrow; i++) {
2733 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2734 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2735 }
2736
2737 /* allocate any new rows */
2738 for(/* i == minrow */; i < row; i++) {
2739 term.line[i] = xmalloc(col * sizeof(Glyph));
2740 term.alt[i] = xmalloc(col * sizeof(Glyph));
2741 }
2742 if(col > term.col) {
2743 bp = term.tabs + term.col;
2744
2745 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2746 while(--bp > term.tabs && !*bp)
2747 /* nothing */ ;
2748 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2749 *bp = 1;
2750 }
2751 /* update terminal size */
2752 term.col = col;
2753 term.row = row;
2754 /* reset scrolling region */
2755 tsetscroll(0, row-1);
2756 /* make use of the LIMIT in tmoveto */
2757 tmoveto(term.c.x, term.c.y);
2758 /* Clearing both screens (it makes dirty all lines) */
2759 c = term.c;
2760 for(i = 0; i < 2; i++) {
2761 if(mincol < col && 0 < minrow) {
2762 tclearregion(mincol, 0, col - 1, minrow - 1);
2763 }
2764 if(0 < col && minrow < row) {
2765 tclearregion(0, minrow, col - 1, row - 1);
2766 }
2767 tswapscreen();
2768 tcursor(CURSOR_LOAD);
2769 }
2770 term.c = c;
2771 }
2772
2773 void
2774 xresize(int col, int row) {
2775 xw.tw = MAX(1, col * xw.cw);
2776 xw.th = MAX(1, row * xw.ch);
2777
2778 XFreePixmap(xw.dpy, xw.buf);
2779 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2780 DefaultDepth(xw.dpy, xw.scr));
2781 XftDrawChange(xw.draw, xw.buf);
2782 xclear(0, 0, xw.w, xw.h);
2783 }
2784
2785 static inline ushort
2786 sixd_to_16bit(int x) {
2787 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2788 }
2789
2790 void
2791 xloadcols(void) {
2792 int i;
2793 XRenderColor color = { .alpha = 0xffff };
2794 static bool loaded;
2795 Color *cp;
2796
2797 if(loaded) {
2798 for (cp = dc.col; cp < dc.col + LEN(dc.col); ++cp)
2799 XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
2800 }
2801
2802 /* load colors [0-15] and [256-LEN(colorname)] (config.h) */
2803 for(i = 0; i < LEN(colorname); i++) {
2804 if(!colorname[i])
2805 continue;
2806 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2807 die("Could not allocate color '%s'\n", colorname[i]);
2808 }
2809 }
2810
2811 /* load colors [16-231] ; same colors as xterm */
2812 for(i = 16; i < 6*6*6+16; i++) {
2813 color.red = sixd_to_16bit( ((i-16)/36)%6 );
2814 color.green = sixd_to_16bit( ((i-16)/6) %6 );
2815 color.blue = sixd_to_16bit( ((i-16)/1) %6 );
2816 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i]))
2817 die("Could not allocate color %d\n", i);
2818 }
2819
2820 /* load colors [232-255] ; grayscale */
2821 for(; i < 256; i++) {
2822 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (i-(6*6*6+16));
2823 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i]))
2824 die("Could not allocate color %d\n", i);
2825 }
2826 loaded = true;
2827 }
2828
2829 int
2830 xsetcolorname(int x, const char *name) {
2831 XRenderColor color = { .alpha = 0xffff };
2832 Color ncolor;
2833
2834 if(!BETWEEN(x, 0, LEN(colorname)))
2835 return 1;
2836
2837 if(!name) {
2838 if(BETWEEN(x, 16, 16 + 215)) { /* 256 color */
2839 color.red = sixd_to_16bit( ((x-16)/36)%6 );
2840 color.green = sixd_to_16bit( ((x-16)/6) %6 );
2841 color.blue = sixd_to_16bit( ((x-16)/1) %6 );
2842 if(!XftColorAllocValue(xw.dpy, xw.vis,
2843 xw.cmap, &color, &ncolor)) {
2844 return 1;
2845 }
2846
2847 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2848 dc.col[x] = ncolor;
2849 return 0;
2850 } else if(BETWEEN(x, 16 + 216, 255)) { /* greyscale */
2851 color.red = color.green = color.blue = \
2852 0x0808 + 0x0a0a * (x - (16 + 216));
2853 if(!XftColorAllocValue(xw.dpy, xw.vis,
2854 xw.cmap, &color, &ncolor)) {
2855 return 1;
2856 }
2857
2858 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2859 dc.col[x] = ncolor;
2860 return 0;
2861 } else { /* system colors */
2862 name = colorname[x];
2863 }
2864 }
2865 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &ncolor))
2866 return 1;
2867
2868 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2869 dc.col[x] = ncolor;
2870 return 0;
2871 }
2872
2873 void
2874 xtermclear(int col1, int row1, int col2, int row2) {
2875 XftDrawRect(xw.draw,
2876 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2877 borderpx + col1 * xw.cw,
2878 borderpx + row1 * xw.ch,
2879 (col2-col1+1) * xw.cw,
2880 (row2-row1+1) * xw.ch);
2881 }
2882
2883 /*
2884 * Absolute coordinates.
2885 */
2886 void
2887 xclear(int x1, int y1, int x2, int y2) {
2888 XftDrawRect(xw.draw,
2889 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2890 x1, y1, x2-x1, y2-y1);
2891 }
2892
2893 void
2894 xhints(void) {
2895 XClassHint class = {opt_class ? opt_class : termname, termname};
2896 XWMHints wm = {.flags = InputHint, .input = 1};
2897 XSizeHints *sizeh = NULL;
2898
2899 sizeh = XAllocSizeHints();
2900
2901 sizeh->flags = PSize | PResizeInc | PBaseSize;
2902 sizeh->height = xw.h;
2903 sizeh->width = xw.w;
2904 sizeh->height_inc = xw.ch;
2905 sizeh->width_inc = xw.cw;
2906 sizeh->base_height = 2 * borderpx;
2907 sizeh->base_width = 2 * borderpx;
2908 if(xw.isfixed == True) {
2909 sizeh->flags |= PMaxSize | PMinSize;
2910 sizeh->min_width = sizeh->max_width = xw.w;
2911 sizeh->min_height = sizeh->max_height = xw.h;
2912 }
2913 if(xw.gm & (XValue|YValue)) {
2914 sizeh->flags |= USPosition | PWinGravity;
2915 sizeh->x = xw.l;
2916 sizeh->y = xw.t;
2917 sizeh->win_gravity = xgeommasktogravity(xw.gm);
2918 }
2919
2920 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
2921 &class);
2922 XFree(sizeh);
2923 }
2924
2925 int
2926 xgeommasktogravity(int mask) {
2927 switch(mask & (XNegative|YNegative)) {
2928 case 0:
2929 return NorthWestGravity;
2930 case XNegative:
2931 return NorthEastGravity;
2932 case YNegative:
2933 return SouthWestGravity;
2934 }
2935 return SouthEastGravity;
2936 }
2937
2938 int
2939 xloadfont(Font *f, FcPattern *pattern) {
2940 FcPattern *match;
2941 FcResult result;
2942
2943 match = FcFontMatch(NULL, pattern, &result);
2944 if(!match)
2945 return 1;
2946
2947 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2948 FcPatternDestroy(match);
2949 return 1;
2950 }
2951
2952 f->set = NULL;
2953 f->pattern = FcPatternDuplicate(pattern);
2954
2955 f->ascent = f->match->ascent;
2956 f->descent = f->match->descent;
2957 f->lbearing = 0;
2958 f->rbearing = f->match->max_advance_width;
2959
2960 f->height = f->ascent + f->descent;
2961 f->width = f->lbearing + f->rbearing;
2962
2963 return 0;
2964 }
2965
2966 void
2967 xloadfonts(char *fontstr, double fontsize) {
2968 FcPattern *pattern;
2969 FcResult r_sz, r_psz;
2970 double fontval;
2971 float ceilf(float);
2972
2973 if(fontstr[0] == '-') {
2974 pattern = XftXlfdParse(fontstr, False, False);
2975 } else {
2976 pattern = FcNameParse((FcChar8 *)fontstr);
2977 }
2978
2979 if(!pattern)
2980 die("st: can't open font %s\n", fontstr);
2981
2982 if(fontsize > 0) {
2983 FcPatternDel(pattern, FC_PIXEL_SIZE);
2984 FcPatternDel(pattern, FC_SIZE);
2985 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2986 usedfontsize = fontsize;
2987 } else {
2988 r_psz = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2989 r_sz = FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval);
2990 if(r_psz == FcResultMatch) {
2991 usedfontsize = fontval;
2992 } else if(r_sz == FcResultMatch) {
2993 usedfontsize = -1;
2994 } else {
2995 /*
2996 * Default font size is 12, if none given. This is to
2997 * have a known usedfontsize value.
2998 */
2999 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
3000 usedfontsize = 12;
3001 }
3002 defaultfontsize = usedfontsize;
3003 }
3004
3005 FcConfigSubstitute(0, pattern, FcMatchPattern);
3006 FcDefaultSubstitute(pattern);
3007
3008 if(xloadfont(&dc.font, pattern))
3009 die("st: can't open font %s\n", fontstr);
3010
3011 if(usedfontsize < 0) {
3012 FcPatternGetDouble(dc.font.match->pattern,
3013 FC_PIXEL_SIZE, 0, &fontval);
3014 usedfontsize = fontval;
3015 if(fontsize == 0)
3016 defaultfontsize = fontval;
3017 }
3018
3019 /* Setting character width and height. */
3020 xw.cw = ceilf(dc.font.width * cwscale);
3021 xw.ch = ceilf(dc.font.height * chscale);
3022
3023 FcPatternDel(pattern, FC_SLANT);
3024 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
3025 if(xloadfont(&dc.ifont, pattern))
3026 die("st: can't open font %s\n", fontstr);
3027
3028 FcPatternDel(pattern, FC_WEIGHT);
3029 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
3030 if(xloadfont(&dc.ibfont, pattern))
3031 die("st: can't open font %s\n", fontstr);
3032
3033 FcPatternDel(pattern, FC_SLANT);
3034 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
3035 if(xloadfont(&dc.bfont, pattern))
3036 die("st: can't open font %s\n", fontstr);
3037
3038 FcPatternDestroy(pattern);
3039 }
3040
3041 int
3042 xloadfontset(Font *f) {
3043 FcResult result;
3044
3045 if(!(f->set = FcFontSort(0, f->pattern, FcTrue, 0, &result)))
3046 return 1;
3047 return 0;
3048 }
3049
3050 void
3051 xunloadfont(Font *f) {
3052 XftFontClose(xw.dpy, f->match);
3053 FcPatternDestroy(f->pattern);
3054 if(f->set)
3055 FcFontSetDestroy(f->set);
3056 }
3057
3058 void
3059 xunloadfonts(void) {
3060 /* Free the loaded fonts in the font cache. */
3061 while(frclen > 0)
3062 XftFontClose(xw.dpy, frc[--frclen].font);
3063
3064 xunloadfont(&dc.font);
3065 xunloadfont(&dc.bfont);
3066 xunloadfont(&dc.ifont);
3067 xunloadfont(&dc.ibfont);
3068 }
3069
3070 void
3071 xzoom(const Arg *arg) {
3072 Arg larg;
3073
3074 larg.i = usedfontsize + arg->i;
3075 xzoomabs(&larg);
3076 }
3077
3078 void
3079 xzoomabs(const Arg *arg) {
3080 xunloadfonts();
3081 xloadfonts(usedfont, arg->i);
3082 cresize(0, 0);
3083 redraw(0);
3084 xhints();
3085 }
3086
3087 void
3088 xzoomreset(const Arg *arg) {
3089 Arg larg;
3090
3091 if(defaultfontsize > 0) {
3092 larg.i = defaultfontsize;
3093 xzoomabs(&larg);
3094 }
3095 }
3096
3097 void
3098 xinit(void) {
3099 XGCValues gcvalues;
3100 Cursor cursor;
3101 Window parent;
3102 pid_t thispid = getpid();
3103
3104 if(!(xw.dpy = XOpenDisplay(NULL)))
3105 die("Can't open display\n");
3106 xw.scr = XDefaultScreen(xw.dpy);
3107 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
3108
3109 /* font */
3110 if(!FcInit())
3111 die("Could not init fontconfig.\n");
3112
3113 usedfont = (opt_font == NULL)? font : opt_font;
3114 xloadfonts(usedfont, 0);
3115
3116 /* colors */
3117 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
3118 xloadcols();
3119
3120 /* adjust fixed window geometry */
3121 xw.w = 2 * borderpx + term.col * xw.cw;
3122 xw.h = 2 * borderpx + term.row * xw.ch;
3123 if(xw.gm & XNegative)
3124 xw.l += DisplayWidth(xw.dpy, xw.scr) - xw.w - 2;
3125 if(xw.gm & YNegative)
3126 xw.t += DisplayWidth(xw.dpy, xw.scr) - xw.h - 2;
3127
3128 /* Events */
3129 xw.attrs.background_pixel = dc.col[defaultbg].pixel;
3130 xw.attrs.border_pixel = dc.col[defaultbg].pixel;
3131 xw.attrs.bit_gravity = NorthWestGravity;
3132 xw.attrs.event_mask = FocusChangeMask | KeyPressMask
3133 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
3134 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
3135 xw.attrs.colormap = xw.cmap;
3136
3137 parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
3138 XRootWindow(xw.dpy, xw.scr);
3139 xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
3140 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
3141 xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
3142 | CWEventMask | CWColormap, &xw.attrs);
3143
3144 memset(&gcvalues, 0, sizeof(gcvalues));
3145 gcvalues.graphics_exposures = False;
3146 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
3147 &gcvalues);
3148 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
3149 DefaultDepth(xw.dpy, xw.scr));
3150 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
3151 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
3152
3153 /* Xft rendering context */
3154 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
3155
3156 /* input methods */
3157 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3158 XSetLocaleModifiers("@im=local");
3159 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3160 XSetLocaleModifiers("@im=");
3161 if((xw.xim = XOpenIM(xw.dpy,
3162 NULL, NULL, NULL)) == NULL) {
3163 die("XOpenIM failed. Could not open input"
3164 " device.\n");
3165 }
3166 }
3167 }
3168 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
3169 | XIMStatusNothing, XNClientWindow, xw.win,
3170 XNFocusWindow, xw.win, NULL);
3171 if(xw.xic == NULL)
3172 die("XCreateIC failed. Could not obtain input method.\n");
3173
3174 /* white cursor, black outline */
3175 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
3176 XDefineCursor(xw.dpy, xw.win, cursor);
3177 XRecolorCursor(xw.dpy, cursor,
3178 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
3179 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
3180
3181 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
3182 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
3183 xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
3184 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
3185
3186 xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
3187 XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
3188 PropModeReplace, (uchar *)&thispid, 1);
3189
3190 xresettitle();
3191 XMapWindow(xw.dpy, xw.win);
3192 xhints();
3193 XSync(xw.dpy, False);
3194 }
3195
3196 void
3197 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
3198 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
3199 width = charlen * xw.cw, xp, i;
3200 int frcflags;
3201 int u8fl, u8fblen, u8cblen, doesexist;
3202 char *u8c, *u8fs;
3203 long unicodep;
3204 Font *font = &dc.font;
3205 FcResult fcres;
3206 FcPattern *fcpattern, *fontpattern;
3207 FcFontSet *fcsets[] = { NULL };
3208 FcCharSet *fccharset;
3209 Color *fg, *bg, *temp, revfg, revbg, truefg, truebg;
3210 XRenderColor colfg, colbg;
3211 XRectangle r;
3212 int oneatatime;
3213
3214 frcflags = FRC_NORMAL;
3215
3216 if(base.mode & ATTR_ITALIC) {
3217 if(base.fg == defaultfg)
3218 base.fg = defaultitalic;
3219 font = &dc.ifont;
3220 frcflags = FRC_ITALIC;
3221 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
3222 if(base.fg == defaultfg)
3223 base.fg = defaultitalic;
3224 font = &dc.ibfont;
3225 frcflags = FRC_ITALICBOLD;
3226 } else if(base.mode & ATTR_UNDERLINE) {
3227 if(base.fg == defaultfg)
3228 base.fg = defaultunderline;
3229 }
3230
3231 if(IS_TRUECOL(base.fg)) {
3232 colfg.alpha = 0xffff;
3233 colfg.red = TRUERED(base.fg);
3234 colfg.green = TRUEGREEN(base.fg);
3235 colfg.blue = TRUEBLUE(base.fg);
3236 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
3237 fg = &truefg;
3238 } else {
3239 fg = &dc.col[base.fg];
3240 }
3241
3242 if(IS_TRUECOL(base.bg)) {
3243 colbg.alpha = 0xffff;
3244 colbg.green = TRUEGREEN(base.bg);
3245 colbg.red = TRUERED(base.bg);
3246 colbg.blue = TRUEBLUE(base.bg);
3247 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
3248 bg = &truebg;
3249 } else {
3250 bg = &dc.col[base.bg];
3251 }
3252
3253 if(base.mode & ATTR_BOLD) {
3254 /*
3255 * change basic system colors [0-7]
3256 * to bright system colors [8-15]
3257 */
3258 if(BETWEEN(base.fg, 0, 7) && !(base.mode & ATTR_FAINT))
3259 fg = &dc.col[base.fg + 8];
3260
3261 if(base.mode & ATTR_ITALIC) {
3262 font = &dc.ibfont;
3263 frcflags = FRC_ITALICBOLD;
3264 } else {
3265 font = &dc.bfont;
3266 frcflags = FRC_BOLD;
3267 }
3268 }
3269
3270 if(IS_SET(MODE_REVERSE)) {
3271 if(fg == &dc.col[defaultfg]) {
3272 fg = &dc.col[defaultbg];
3273 } else {
3274 colfg.red = ~fg->color.red;
3275 colfg.green = ~fg->color.green;
3276 colfg.blue = ~fg->color.blue;
3277 colfg.alpha = fg->color.alpha;
3278 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
3279 &revfg);
3280 fg = &revfg;
3281 }
3282
3283 if(bg == &dc.col[defaultbg]) {
3284 bg = &dc.col[defaultfg];
3285 } else {
3286 colbg.red = ~bg->color.red;
3287 colbg.green = ~bg->color.green;
3288 colbg.blue = ~bg->color.blue;
3289 colbg.alpha = bg->color.alpha;
3290 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
3291 &revbg);
3292 bg = &revbg;
3293 }
3294 }
3295
3296 if(base.mode & ATTR_REVERSE) {
3297 temp = fg;
3298 fg = bg;
3299 bg = temp;
3300 }
3301
3302 if(base.mode & ATTR_FAINT && !(base.mode & ATTR_BOLD)) {
3303 colfg.red = fg->color.red / 2;
3304 colfg.green = fg->color.green / 2;
3305 colfg.blue = fg->color.blue / 2;
3306 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
3307 fg = &revfg;
3308 }
3309
3310 if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
3311 fg = bg;
3312
3313 if(base.mode & ATTR_INVISIBLE)
3314 fg = bg;
3315
3316 /* Intelligent cleaning up of the borders. */
3317 if(x == 0) {
3318 xclear(0, (y == 0)? 0 : winy, borderpx,
3319 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
3320 }
3321 if(x + charlen >= term.col) {
3322 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
3323 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
3324 }
3325 if(y == 0)
3326 xclear(winx, 0, winx + width, borderpx);
3327 if(y == term.row-1)
3328 xclear(winx, winy + xw.ch, winx + width, xw.h);
3329
3330 /* Clean up the region we want to draw to. */
3331 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
3332
3333 /* Set the clip region because Xft is sometimes dirty. */
3334 r.x = 0;
3335 r.y = 0;
3336 r.height = xw.ch;
3337 r.width = width;
3338 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
3339
3340 for(xp = winx; bytelen > 0;) {
3341 /*
3342 * Search for the range in the to be printed string of glyphs
3343 * that are in the main font. Then print that range. If
3344 * some glyph is found that is not in the font, do the
3345 * fallback dance.
3346 */
3347 u8fs = s;
3348 u8fblen = 0;
3349 u8fl = 0;
3350 oneatatime = font->width != xw.cw;
3351 for(;;) {
3352 u8c = s;
3353 u8cblen = utf8decode(s, &unicodep, UTF_SIZ);
3354 s += u8cblen;
3355 bytelen -= u8cblen;
3356
3357 doesexist = XftCharExists(xw.dpy, font->match, unicodep);
3358 if(doesexist) {
3359 u8fl++;
3360 u8fblen += u8cblen;
3361 if(!oneatatime && bytelen > 0)
3362 continue;
3363 }
3364
3365 if(u8fl > 0) {
3366 XftDrawStringUtf8(xw.draw, fg,
3367 font->match, xp,
3368 winy + font->ascent,
3369 (FcChar8 *)u8fs,
3370 u8fblen);
3371 xp += xw.cw * u8fl;
3372 }
3373 break;
3374 }
3375 if(doesexist) {
3376 if(oneatatime)
3377 continue;
3378 break;
3379 }
3380
3381 /* Search the font cache. */
3382 for(i = 0; i < frclen; i++) {
3383 if(XftCharExists(xw.dpy, frc[i].font, unicodep)
3384 && frc[i].flags == frcflags) {
3385 break;
3386 }
3387 }
3388
3389 /* Nothing was found. */
3390 if(i >= frclen) {
3391 if(!font->set)
3392 xloadfontset(font);
3393 fcsets[0] = font->set;
3394
3395 /*
3396 * Nothing was found in the cache. Now use
3397 * some dozen of Fontconfig calls to get the
3398 * font for one single character.
3399 *
3400 * Xft and fontconfig are design failures.
3401 */
3402 fcpattern = FcPatternDuplicate(font->pattern);
3403 fccharset = FcCharSetCreate();
3404
3405 FcCharSetAddChar(fccharset, unicodep);
3406 FcPatternAddCharSet(fcpattern, FC_CHARSET,
3407 fccharset);
3408 FcPatternAddBool(fcpattern, FC_SCALABLE,
3409 FcTrue);
3410
3411 FcConfigSubstitute(0, fcpattern,
3412 FcMatchPattern);
3413 FcDefaultSubstitute(fcpattern);
3414
3415 fontpattern = FcFontSetMatch(0, fcsets,
3416 FcTrue, fcpattern, &fcres);
3417
3418 /*
3419 * Overwrite or create the new cache entry.
3420 */
3421 if(frclen >= LEN(frc)) {
3422 frclen = LEN(frc) - 1;
3423 XftFontClose(xw.dpy, frc[frclen].font);
3424 }
3425
3426 frc[frclen].font = XftFontOpenPattern(xw.dpy,
3427 fontpattern);
3428 frc[frclen].flags = frcflags;
3429
3430 i = frclen;
3431 frclen++;
3432
3433 FcPatternDestroy(fcpattern);
3434 FcCharSetDestroy(fccharset);
3435 }
3436
3437 XftDrawStringUtf8(xw.draw, fg, frc[i].font,
3438 xp, winy + frc[i].font->ascent,
3439 (FcChar8 *)u8c, u8cblen);
3440
3441 xp += xw.cw * wcwidth(unicodep);
3442 }
3443
3444 /*
3445 * This is how the loop above actually should be. Why does the
3446 * application have to care about font details?
3447 *
3448 * I have to repeat: Xft and Fontconfig are design failures.
3449 */
3450 /*
3451 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
3452 winy + font->ascent, (FcChar8 *)s, bytelen);
3453 */
3454
3455 if(base.mode & ATTR_UNDERLINE) {
3456 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
3457 width, 1);
3458 }
3459
3460 if(base.mode & ATTR_STRUCK) {
3461 XftDrawRect(xw.draw, fg, winx, winy + 2 * font->ascent / 3,
3462 width, 1);
3463 }
3464
3465 /* Reset clip to none. */
3466 XftDrawSetClip(xw.draw, 0);
3467 }
3468
3469 void
3470 xdrawcursor(void) {
3471 static int oldx = 0, oldy = 0;
3472 int sl, width, curx;
3473 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
3474
3475 LIMIT(oldx, 0, term.col-1);
3476 LIMIT(oldy, 0, term.row-1);
3477
3478 curx = term.c.x;
3479
3480 /* adjust position if in dummy */
3481 if(term.line[oldy][oldx].mode & ATTR_WDUMMY)
3482 oldx--;
3483 if(term.line[term.c.y][curx].mode & ATTR_WDUMMY)
3484 curx--;
3485
3486 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
3487
3488 /* remove the old cursor */
3489 sl = utf8len(term.line[oldy][oldx].c);
3490 width = (term.line[oldy][oldx].mode & ATTR_WIDE)? 2 : 1;
3491 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
3492 oldy, width, sl);
3493
3494 if(IS_SET(MODE_HIDE))
3495 return;
3496
3497 /* draw the new one */
3498 if(xw.state & WIN_FOCUSED) {
3499 if(IS_SET(MODE_REVERSE)) {
3500 g.mode |= ATTR_REVERSE;
3501 g.fg = defaultcs;
3502 g.bg = defaultfg;
3503 }
3504
3505 sl = utf8len(g.c);
3506 width = (term.line[term.c.y][curx].mode & ATTR_WIDE)\
3507 ? 2 : 1;
3508 xdraws(g.c, g, term.c.x, term.c.y, width, sl);
3509 } else {
3510 XftDrawRect(xw.draw, &dc.col[defaultcs],
3511 borderpx + curx * xw.cw,
3512 borderpx + term.c.y * xw.ch,
3513 xw.cw - 1, 1);
3514 XftDrawRect(xw.draw, &dc.col[defaultcs],
3515 borderpx + curx * xw.cw,
3516 borderpx + term.c.y * xw.ch,
3517 1, xw.ch - 1);
3518 XftDrawRect(xw.draw, &dc.col[defaultcs],
3519 borderpx + (curx + 1) * xw.cw - 1,
3520 borderpx + term.c.y * xw.ch,
3521 1, xw.ch - 1);
3522 XftDrawRect(xw.draw, &dc.col[defaultcs],
3523 borderpx + curx * xw.cw,
3524 borderpx + (term.c.y + 1) * xw.ch - 1,
3525 xw.cw, 1);
3526 }
3527 oldx = curx, oldy = term.c.y;
3528 }
3529
3530
3531 void
3532 xsettitle(char *p) {
3533 XTextProperty prop;
3534
3535 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3536 &prop);
3537 XSetWMName(xw.dpy, xw.win, &prop);
3538 XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
3539 XFree(prop.value);
3540 }
3541
3542 void
3543 xresettitle(void) {
3544 xsettitle(opt_title ? opt_title : "st");
3545 }
3546
3547 void
3548 redraw(int timeout) {
3549 struct timespec tv = {0, timeout * 1000};
3550
3551 tfulldirt();
3552 draw();
3553
3554 if(timeout > 0) {
3555 nanosleep(&tv, NULL);
3556 XSync(xw.dpy, False); /* necessary for a good tput flash */
3557 }
3558 }
3559
3560 void
3561 draw(void) {
3562 drawregion(0, 0, term.col, term.row);
3563 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3564 xw.h, 0, 0);
3565 XSetForeground(xw.dpy, dc.gc,
3566 dc.col[IS_SET(MODE_REVERSE)?
3567 defaultfg : defaultbg].pixel);
3568 }
3569
3570 void
3571 drawregion(int x1, int y1, int x2, int y2) {
3572 int ic, ib, x, y, ox, sl;
3573 Glyph base, new;
3574 char buf[DRAW_BUF_SIZ];
3575 bool ena_sel = sel.ob.x != -1 && sel.alt == IS_SET(MODE_ALTSCREEN);
3576 long unicodep;
3577
3578 if(!(xw.state & WIN_VISIBLE))
3579 return;
3580
3581 for(y = y1; y < y2; y++) {
3582 if(!term.dirty[y])
3583 continue;
3584
3585 xtermclear(0, y, term.col, y);
3586 term.dirty[y] = 0;
3587 base = term.line[y][0];
3588 ic = ib = ox = 0;
3589 for(x = x1; x < x2; x++) {
3590 new = term.line[y][x];
3591 if(new.mode == ATTR_WDUMMY)
3592 continue;
3593 if(ena_sel && selected(x, y))
3594 new.mode ^= ATTR_REVERSE;
3595 if(ib > 0 && (ATTRCMP(base, new)
3596 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3597 xdraws(buf, base, ox, y, ic, ib);
3598 ic = ib = 0;
3599 }
3600 if(ib == 0) {
3601 ox = x;
3602 base = new;
3603 }
3604
3605 sl = utf8decode(new.c, &unicodep, UTF_SIZ);
3606 memcpy(buf+ib, new.c, sl);
3607 ib += sl;
3608 ic += (new.mode & ATTR_WIDE)? 2 : 1;
3609 }
3610 if(ib > 0)
3611 xdraws(buf, base, ox, y, ic, ib);
3612 }
3613 xdrawcursor();
3614 }
3615
3616 void
3617 expose(XEvent *ev) {
3618 XExposeEvent *e = &ev->xexpose;
3619
3620 if(xw.state & WIN_REDRAW) {
3621 if(!e->count)
3622 xw.state &= ~WIN_REDRAW;
3623 }
3624 redraw(0);
3625 }
3626
3627 void
3628 visibility(XEvent *ev) {
3629 XVisibilityEvent *e = &ev->xvisibility;
3630
3631 if(e->state == VisibilityFullyObscured) {
3632 xw.state &= ~WIN_VISIBLE;
3633 } else if(!(xw.state & WIN_VISIBLE)) {
3634 /* need a full redraw for next Expose, not just a buf copy */
3635 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3636 }
3637 }
3638
3639 void
3640 unmap(XEvent *ev) {
3641 xw.state &= ~WIN_VISIBLE;
3642 }
3643
3644 void
3645 xsetpointermotion(int set) {
3646 MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
3647 XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
3648 }
3649
3650 void
3651 xseturgency(int add) {
3652 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3653
3654 MODBIT(h->flags, add, XUrgencyHint);
3655 XSetWMHints(xw.dpy, xw.win, h);
3656 XFree(h);
3657 }
3658
3659 void
3660 focus(XEvent *ev) {
3661 XFocusChangeEvent *e = &ev->xfocus;
3662
3663 if(e->mode == NotifyGrab)
3664 return;
3665
3666 if(ev->type == FocusIn) {
3667 XSetICFocus(xw.xic);
3668 xw.state |= WIN_FOCUSED;
3669 xseturgency(0);
3670 if(IS_SET(MODE_FOCUS))
3671 ttywrite("\033[I", 3);
3672 } else {
3673 XUnsetICFocus(xw.xic);
3674 xw.state &= ~WIN_FOCUSED;
3675 if(IS_SET(MODE_FOCUS))
3676 ttywrite("\033[O", 3);
3677 }
3678 }
3679
3680 static inline bool
3681 match(uint mask, uint state) {
3682 return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
3683 }
3684
3685 void
3686 numlock(const Arg *dummy) {
3687 term.numlock ^= 1;
3688 }
3689
3690 char*
3691 kmap(KeySym k, uint state) {
3692 Key *kp;
3693 int i;
3694
3695 /* Check for mapped keys out of X11 function keys. */
3696 for(i = 0; i < LEN(mappedkeys); i++) {
3697 if(mappedkeys[i] == k)
3698 break;
3699 }
3700 if(i == LEN(mappedkeys)) {
3701 if((k & 0xFFFF) < 0xFD00)
3702 return NULL;
3703 }
3704
3705 for(kp = key; kp < key + LEN(key); kp++) {
3706 if(kp->k != k)
3707 continue;
3708
3709 if(!match(kp->mask, state))
3710 continue;
3711
3712 if(IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
3713 continue;
3714 if(term.numlock && kp->appkey == 2)
3715 continue;
3716
3717 if(IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
3718 continue;
3719
3720 if(IS_SET(MODE_CRLF) ? kp->crlf < 0 : kp->crlf > 0)
3721 continue;
3722
3723 return kp->s;
3724 }
3725
3726 return NULL;
3727 }
3728
3729 void
3730 kpress(XEvent *ev) {
3731 XKeyEvent *e = &ev->xkey;
3732 KeySym ksym;
3733 char buf[32], *customkey;
3734 int len;
3735 long c;
3736 Status status;
3737 Shortcut *bp;
3738
3739 if(IS_SET(MODE_KBDLOCK))
3740 return;
3741
3742 len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
3743 /* 1. shortcuts */
3744 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3745 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3746 bp->func(&(bp->arg));
3747 return;
3748 }
3749 }
3750
3751 /* 2. custom keys from config.h */
3752 if((customkey = kmap(ksym, e->state))) {
3753 ttysend(customkey, strlen(customkey));
3754 return;
3755 }
3756
3757 /* 3. composed string from input method */
3758 if(len == 0)
3759 return;
3760 if(len == 1 && e->state & Mod1Mask) {
3761 if(IS_SET(MODE_8BIT)) {
3762 if(*buf < 0177) {
3763 c = *buf | 0x80;
3764 len = utf8encode(c, buf, UTF_SIZ);
3765 }
3766 } else {
3767 buf[1] = buf[0];
3768 buf[0] = '\033';
3769 len = 2;
3770 }
3771 }
3772 ttysend(buf, len);
3773 }
3774
3775
3776 void
3777 cmessage(XEvent *e) {
3778 /*
3779 * See xembed specs
3780 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3781 */
3782 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3783 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3784 xw.state |= WIN_FOCUSED;
3785 xseturgency(0);
3786 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3787 xw.state &= ~WIN_FOCUSED;
3788 }
3789 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3790 /* Send SIGHUP to shell */
3791 kill(pid, SIGHUP);
3792 exit(EXIT_SUCCESS);
3793 }
3794 }
3795
3796 void
3797 cresize(int width, int height) {
3798 int col, row;
3799
3800 if(width != 0)
3801 xw.w = width;
3802 if(height != 0)
3803 xw.h = height;
3804
3805 col = (xw.w - 2 * borderpx) / xw.cw;
3806 row = (xw.h - 2 * borderpx) / xw.ch;
3807
3808 tresize(col, row);
3809 xresize(col, row);
3810 ttyresize();
3811 }
3812
3813 void
3814 resize(XEvent *e) {
3815 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3816 return;
3817
3818 cresize(e->xconfigure.width, e->xconfigure.height);
3819 }
3820
3821 void
3822 run(void) {
3823 XEvent ev;
3824 int w = xw.w, h = xw.h;
3825 fd_set rfd;
3826 int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3827 struct timespec drawtimeout, *tv = NULL, now, last, lastblink;
3828 long deltatime;
3829
3830 /* Waiting for window mapping */
3831 while(1) {
3832 XNextEvent(xw.dpy, &ev);
3833 if(XFilterEvent(&ev, None))
3834 continue;
3835 if(ev.type == ConfigureNotify) {
3836 w = ev.xconfigure.width;
3837 h = ev.xconfigure.height;
3838 } else if(ev.type == MapNotify) {
3839 break;
3840 }
3841 }
3842
3843 ttynew();
3844 cresize(w, h);
3845
3846 clock_gettime(CLOCK_MONOTONIC, &last);
3847 lastblink = last;
3848
3849 for(xev = actionfps;;) {
3850 FD_ZERO(&rfd);
3851 FD_SET(cmdfd, &rfd);
3852 FD_SET(xfd, &rfd);
3853
3854 if(pselect(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv, NULL) < 0) {
3855 if(errno == EINTR)
3856 continue;
3857 die("select failed: %s\n", strerror(errno));
3858 }
3859 if(FD_ISSET(cmdfd, &rfd)) {
3860 ttyread();
3861 if(blinktimeout) {
3862 blinkset = tattrset(ATTR_BLINK);
3863 if(!blinkset)
3864 MODBIT(term.mode, 0, MODE_BLINK);
3865 }
3866 }
3867
3868 if(FD_ISSET(xfd, &rfd))
3869 xev = actionfps;
3870
3871 clock_gettime(CLOCK_MONOTONIC, &now);
3872 drawtimeout.tv_sec = 0;
3873 drawtimeout.tv_nsec = (1000/xfps) * 1E6;
3874 tv = &drawtimeout;
3875
3876 dodraw = 0;
3877 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
3878 tsetdirtattr(ATTR_BLINK);
3879 term.mode ^= MODE_BLINK;
3880 lastblink = now;
3881 dodraw = 1;
3882 }
3883 deltatime = TIMEDIFF(now, last);
3884 if(deltatime > (xev? (1000/xfps) : (1000/actionfps))
3885 || deltatime < 0) {
3886 dodraw = 1;
3887 last = now;
3888 }
3889
3890 if(dodraw) {
3891 while(XPending(xw.dpy)) {
3892 XNextEvent(xw.dpy, &ev);
3893 if(XFilterEvent(&ev, None))
3894 continue;
3895 if(handler[ev.type])
3896 (handler[ev.type])(&ev);
3897 }
3898
3899 draw();
3900 XFlush(xw.dpy);
3901
3902 if(xev && !FD_ISSET(xfd, &rfd))
3903 xev--;
3904 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
3905 if(blinkset) {
3906 if(TIMEDIFF(now, lastblink) \
3907 > blinktimeout) {
3908 drawtimeout.tv_nsec = 1000;
3909 } else {
3910 drawtimeout.tv_nsec = (1E6 * \
3911 (blinktimeout - \
3912 TIMEDIFF(now,
3913 lastblink)));
3914 }
3915 } else {
3916 tv = NULL;
3917 }
3918 }
3919 }
3920 }
3921 }
3922
3923 void
3924 usage(void) {
3925 die("%s " VERSION " (c) 2010-2014 st engineers\n" \
3926 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]\n"
3927 " [-i] [-t title] [-w windowid] [-e command ...]\n", argv0);
3928 }
3929
3930 int
3931 main(int argc, char *argv[]) {
3932 char *titles;
3933 uint cols = 80, rows = 24;
3934
3935 xw.l = xw.t = 0;
3936 xw.isfixed = False;
3937
3938 ARGBEGIN {
3939 case 'a':
3940 allowaltscreen = false;
3941 break;
3942 case 'c':
3943 opt_class = EARGF(usage());
3944 break;
3945 case 'e':
3946 /* eat all remaining arguments */
3947 if(argc > 1) {
3948 opt_cmd = &argv[1];
3949 if(argv[1] != NULL && opt_title == NULL) {
3950 titles = xstrdup(argv[1]);
3951 opt_title = basename(titles);
3952 }
3953 }
3954 goto run;
3955 case 'f':
3956 opt_font = EARGF(usage());
3957 break;
3958 case 'g':
3959 xw.gm = XParseGeometry(EARGF(usage()),
3960 &xw.l, &xw.t, &cols, &rows);
3961 break;
3962 case 'i':
3963 xw.isfixed = True;
3964 break;
3965 case 'o':
3966 opt_io = EARGF(usage());
3967 break;
3968 case 't':
3969 opt_title = EARGF(usage());
3970 break;
3971 case 'w':
3972 opt_embed = EARGF(usage());
3973 break;
3974 case 'v':
3975 default:
3976 usage();
3977 } ARGEND;
3978
3979 run:
3980 setlocale(LC_CTYPE, "");
3981 XSetLocaleModifiers("");
3982 tnew(cols? cols : 1, rows? rows : 1);
3983 xinit();
3984 selinit();
3985 run();
3986
3987 return 0;
3988 }
3989