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Replace character with U+FFFD if wcwidth() is -1
[st.git] / st.c
1 /* See LICENSE for licence details. */
2 #include <ctype.h>
3 #include <errno.h>
4 #include <fcntl.h>
5 #include <limits.h>
6 #include <locale.h>
7 #include <pwd.h>
8 #include <stdarg.h>
9 #include <stdbool.h>
10 #include <stdio.h>
11 #include <stdlib.h>
12 #include <string.h>
13 #include <signal.h>
14 #include <stdint.h>
15 #include <sys/ioctl.h>
16 #include <sys/select.h>
17 #include <sys/stat.h>
18 #include <sys/time.h>
19 #include <sys/types.h>
20 #include <sys/wait.h>
21 #include <time.h>
22 #include <unistd.h>
23 #include <libgen.h>
24 #include <X11/Xatom.h>
25 #include <X11/Xlib.h>
26 #include <X11/Xutil.h>
27 #include <X11/cursorfont.h>
28 #include <X11/keysym.h>
29 #include <X11/Xft/Xft.h>
30 #include <X11/XKBlib.h>
31 #include <fontconfig/fontconfig.h>
32 #include <wchar.h>
33
34 #include "arg.h"
35
36 char *argv0;
37
38 #define Glyph Glyph_
39 #define Font Font_
40
41 #if defined(__linux)
42 #include <pty.h>
43 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
44 #include <util.h>
45 #elif defined(__FreeBSD__) || defined(__DragonFly__)
46 #include <libutil.h>
47 #endif
48
49
50 /* XEMBED messages */
51 #define XEMBED_FOCUS_IN 4
52 #define XEMBED_FOCUS_OUT 5
53
54 /* Arbitrary sizes */
55 #define UTF_INVALID 0xFFFD
56 #define UTF_SIZ 4
57 #define ESC_BUF_SIZ (128*UTF_SIZ)
58 #define ESC_ARG_SIZ 16
59 #define STR_BUF_SIZ ESC_BUF_SIZ
60 #define STR_ARG_SIZ ESC_ARG_SIZ
61 #define DRAW_BUF_SIZ 20*1024
62 #define XK_ANY_MOD UINT_MAX
63 #define XK_NO_MOD 0
64 #define XK_SWITCH_MOD (1<<13)
65
66 #define REDRAW_TIMEOUT (80*1000) /* 80 ms */
67
68 /* macros */
69 #define MIN(a, b) ((a) < (b) ? (a) : (b))
70 #define MAX(a, b) ((a) < (b) ? (b) : (a))
71 #define LEN(a) (sizeof(a) / sizeof(a)[0])
72 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
73 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
74 #define ISCONTROLC0(c) (BETWEEN(c, 0, 0x1f) || (c) == '\177')
75 #define ISCONTROLC1(c) (BETWEEN(c, 0x80, 0x9f))
76 #define ISCONTROL(c) (ISCONTROLC0(c) || ISCONTROLC1(c))
77 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
78 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
79 #define IS_SET(flag) ((term.mode & (flag)) != 0)
80 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_nsec-t2.tv_nsec)/1E6)
81 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
82
83 #define TRUECOLOR(r,g,b) (1 << 24 | (r) << 16 | (g) << 8 | (b))
84 #define IS_TRUECOL(x) (1 << 24 & (x))
85 #define TRUERED(x) (((x) & 0xff0000) >> 8)
86 #define TRUEGREEN(x) (((x) & 0xff00))
87 #define TRUEBLUE(x) (((x) & 0xff) << 8)
88
89
90 enum glyph_attribute {
91 ATTR_NULL = 0,
92 ATTR_BOLD = 1 << 0,
93 ATTR_FAINT = 1 << 1,
94 ATTR_ITALIC = 1 << 2,
95 ATTR_UNDERLINE = 1 << 3,
96 ATTR_BLINK = 1 << 4,
97 ATTR_REVERSE = 1 << 5,
98 ATTR_INVISIBLE = 1 << 6,
99 ATTR_STRUCK = 1 << 7,
100 ATTR_WRAP = 1 << 8,
101 ATTR_WIDE = 1 << 9,
102 ATTR_WDUMMY = 1 << 10,
103 };
104
105 enum cursor_movement {
106 CURSOR_SAVE,
107 CURSOR_LOAD
108 };
109
110 enum cursor_state {
111 CURSOR_DEFAULT = 0,
112 CURSOR_WRAPNEXT = 1,
113 CURSOR_ORIGIN = 2
114 };
115
116 enum term_mode {
117 MODE_WRAP = 1 << 0,
118 MODE_INSERT = 1 << 1,
119 MODE_APPKEYPAD = 1 << 2,
120 MODE_ALTSCREEN = 1 << 3,
121 MODE_CRLF = 1 << 4,
122 MODE_MOUSEBTN = 1 << 5,
123 MODE_MOUSEMOTION = 1 << 6,
124 MODE_REVERSE = 1 << 7,
125 MODE_KBDLOCK = 1 << 8,
126 MODE_HIDE = 1 << 9,
127 MODE_ECHO = 1 << 10,
128 MODE_APPCURSOR = 1 << 11,
129 MODE_MOUSESGR = 1 << 12,
130 MODE_8BIT = 1 << 13,
131 MODE_BLINK = 1 << 14,
132 MODE_FBLINK = 1 << 15,
133 MODE_FOCUS = 1 << 16,
134 MODE_MOUSEX10 = 1 << 17,
135 MODE_MOUSEMANY = 1 << 18,
136 MODE_BRCKTPASTE = 1 << 19,
137 MODE_PRINT = 1 << 20,
138 MODE_MOUSE = MODE_MOUSEBTN|MODE_MOUSEMOTION|MODE_MOUSEX10\
139 |MODE_MOUSEMANY,
140 };
141
142 enum charset {
143 CS_GRAPHIC0,
144 CS_GRAPHIC1,
145 CS_UK,
146 CS_USA,
147 CS_MULTI,
148 CS_GER,
149 CS_FIN
150 };
151
152 enum escape_state {
153 ESC_START = 1,
154 ESC_CSI = 2,
155 ESC_STR = 4, /* DCS, OSC, PM, APC */
156 ESC_ALTCHARSET = 8,
157 ESC_STR_END = 16, /* a final string was encountered */
158 ESC_TEST = 32, /* Enter in test mode */
159 };
160
161 enum window_state {
162 WIN_VISIBLE = 1,
163 WIN_REDRAW = 2,
164 WIN_FOCUSED = 4
165 };
166
167 enum selection_type {
168 SEL_REGULAR = 1,
169 SEL_RECTANGULAR = 2
170 };
171
172 enum selection_snap {
173 SNAP_WORD = 1,
174 SNAP_LINE = 2
175 };
176
177 typedef unsigned char uchar;
178 typedef unsigned int uint;
179 typedef unsigned long ulong;
180 typedef unsigned short ushort;
181
182 typedef XftDraw *Draw;
183 typedef XftColor Color;
184
185 typedef struct {
186 char c[UTF_SIZ]; /* character code */
187 ushort mode; /* attribute flags */
188 uint32_t fg; /* foreground */
189 uint32_t bg; /* background */
190 } Glyph;
191
192 typedef Glyph *Line;
193
194 typedef struct {
195 Glyph attr; /* current char attributes */
196 int x;
197 int y;
198 char state;
199 } TCursor;
200
201 /* CSI Escape sequence structs */
202 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
203 typedef struct {
204 char buf[ESC_BUF_SIZ]; /* raw string */
205 int len; /* raw string length */
206 char priv;
207 int arg[ESC_ARG_SIZ];
208 int narg; /* nb of args */
209 char mode;
210 } CSIEscape;
211
212 /* STR Escape sequence structs */
213 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
214 typedef struct {
215 char type; /* ESC type ... */
216 char buf[STR_BUF_SIZ]; /* raw string */
217 int len; /* raw string length */
218 char *args[STR_ARG_SIZ];
219 int narg; /* nb of args */
220 } STREscape;
221
222 /* Internal representation of the screen */
223 typedef struct {
224 int row; /* nb row */
225 int col; /* nb col */
226 Line *line; /* screen */
227 Line *alt; /* alternate screen */
228 bool *dirty; /* dirtyness of lines */
229 TCursor c; /* cursor */
230 int top; /* top scroll limit */
231 int bot; /* bottom scroll limit */
232 int mode; /* terminal mode flags */
233 int esc; /* escape state flags */
234 char trantbl[4]; /* charset table translation */
235 int charset; /* current charset */
236 int icharset; /* selected charset for sequence */
237 bool numlock; /* lock numbers in keyboard */
238 bool *tabs;
239 } Term;
240
241 /* Purely graphic info */
242 typedef struct {
243 Display *dpy;
244 Colormap cmap;
245 Window win;
246 Drawable buf;
247 Atom xembed, wmdeletewin, netwmname, netwmpid;
248 XIM xim;
249 XIC xic;
250 Draw draw;
251 Visual *vis;
252 XSetWindowAttributes attrs;
253 int scr;
254 bool isfixed; /* is fixed geometry? */
255 int l, t; /* left and top offset */
256 int gm; /* geometry mask */
257 int tw, th; /* tty width and height */
258 int w, h; /* window width and height */
259 int ch; /* char height */
260 int cw; /* char width */
261 char state; /* focus, redraw, visible */
262 } XWindow;
263
264 typedef struct {
265 uint b;
266 uint mask;
267 char *s;
268 } Mousekey;
269
270 typedef struct {
271 KeySym k;
272 uint mask;
273 char *s;
274 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
275 signed char appkey; /* application keypad */
276 signed char appcursor; /* application cursor */
277 signed char crlf; /* crlf mode */
278 } Key;
279
280 typedef struct {
281 int mode;
282 int type;
283 int snap;
284 /*
285 * Selection variables:
286 * nb – normalized coordinates of the beginning of the selection
287 * ne – normalized coordinates of the end of the selection
288 * ob – original coordinates of the beginning of the selection
289 * oe – original coordinates of the end of the selection
290 */
291 struct {
292 int x, y;
293 } nb, ne, ob, oe;
294
295 char *clip;
296 Atom xtarget;
297 bool alt;
298 struct timespec tclick1;
299 struct timespec tclick2;
300 } Selection;
301
302 typedef union {
303 int i;
304 uint ui;
305 float f;
306 const void *v;
307 } Arg;
308
309 typedef struct {
310 uint mod;
311 KeySym keysym;
312 void (*func)(const Arg *);
313 const Arg arg;
314 } Shortcut;
315
316 /* function definitions used in config.h */
317 static void clippaste(const Arg *);
318 static void numlock(const Arg *);
319 static void selpaste(const Arg *);
320 static void xzoom(const Arg *);
321 static void xzoomabs(const Arg *);
322 static void xzoomreset(const Arg *);
323 static void printsel(const Arg *);
324 static void printscreen(const Arg *) ;
325 static void toggleprinter(const Arg *);
326
327 /* Config.h for applying patches and the configuration. */
328 #include "config.h"
329
330 /* Font structure */
331 typedef struct {
332 int height;
333 int width;
334 int ascent;
335 int descent;
336 short lbearing;
337 short rbearing;
338 XftFont *match;
339 FcFontSet *set;
340 FcPattern *pattern;
341 } Font;
342
343 /* Drawing Context */
344 typedef struct {
345 Color col[MAX(LEN(colorname), 256)];
346 Font font, bfont, ifont, ibfont;
347 GC gc;
348 } DC;
349
350 static void die(const char *, ...);
351 static void draw(void);
352 static void redraw(int);
353 static void drawregion(int, int, int, int);
354 static void execsh(void);
355 static void sigchld(int);
356 static void run(void);
357
358 static void csidump(void);
359 static void csihandle(void);
360 static void csiparse(void);
361 static void csireset(void);
362 static int eschandle(uchar ascii);
363 static void strdump(void);
364 static void strhandle(void);
365 static void strparse(void);
366 static void strreset(void);
367
368 static int tattrset(int);
369 static void tprinter(char *, size_t);
370 static void tdumpsel(void);
371 static void tdumpline(int);
372 static void tdump(void);
373 static void tclearregion(int, int, int, int);
374 static void tcursor(int);
375 static void tdeletechar(int);
376 static void tdeleteline(int);
377 static void tinsertblank(int);
378 static void tinsertblankline(int);
379 static int tlinelen(int);
380 static void tmoveto(int, int);
381 static void tmoveato(int, int);
382 static void tnew(int, int);
383 static void tnewline(int);
384 static void tputtab(int);
385 static void tputc(char *, int);
386 static void treset(void);
387 static void tresize(int, int);
388 static void tscrollup(int, int);
389 static void tscrolldown(int, int);
390 static void tsetattr(int *, int);
391 static void tsetchar(char *, Glyph *, int, int);
392 static void tsetscroll(int, int);
393 static void tswapscreen(void);
394 static void tsetdirt(int, int);
395 static void tsetdirtattr(int);
396 static void tsetmode(bool, bool, int *, int);
397 static void tfulldirt(void);
398 static void techo(char *, int);
399 static void tcontrolcode(uchar );
400 static void tdectest(char );
401 static int32_t tdefcolor(int *, int *, int);
402 static void tdeftran(char);
403 static inline bool match(uint, uint);
404 static void ttynew(void);
405 static void ttyread(void);
406 static void ttyresize(void);
407 static void ttysend(char *, size_t);
408 static void ttywrite(const char *, size_t);
409 static void tstrsequence(uchar c);
410
411 static void xdraws(char *, Glyph, int, int, int, int);
412 static void xhints(void);
413 static void xclear(int, int, int, int);
414 static void xdrawcursor(void);
415 static void xinit(void);
416 static void xloadcols(void);
417 static int xsetcolorname(int, const char *);
418 static int xgeommasktogravity(int);
419 static int xloadfont(Font *, FcPattern *);
420 static void xloadfonts(char *, double);
421 static int xloadfontset(Font *);
422 static void xsettitle(char *);
423 static void xresettitle(void);
424 static void xsetpointermotion(int);
425 static void xseturgency(int);
426 static void xsetsel(char *);
427 static void xtermclear(int, int, int, int);
428 static void xunloadfont(Font *);
429 static void xunloadfonts(void);
430 static void xresize(int, int);
431
432 static void expose(XEvent *);
433 static void visibility(XEvent *);
434 static void unmap(XEvent *);
435 static char *kmap(KeySym, uint);
436 static void kpress(XEvent *);
437 static void cmessage(XEvent *);
438 static void cresize(int, int);
439 static void resize(XEvent *);
440 static void focus(XEvent *);
441 static void brelease(XEvent *);
442 static void bpress(XEvent *);
443 static void bmotion(XEvent *);
444 static void selnotify(XEvent *);
445 static void selclear(XEvent *);
446 static void selrequest(XEvent *);
447
448 static void selinit(void);
449 static void selnormalize(void);
450 static inline bool selected(int, int);
451 static char *getsel(void);
452 static void selcopy(void);
453 static void selscroll(int, int);
454 static void selsnap(int, int *, int *, int);
455 static void getbuttoninfo(XEvent *);
456 static void mousereport(XEvent *);
457
458 static size_t utf8decode(char *, long *, size_t);
459 static long utf8decodebyte(char, size_t *);
460 static size_t utf8encode(long, char *, size_t);
461 static char utf8encodebyte(long, size_t);
462 static size_t utf8len(char *);
463 static size_t utf8validate(long *, size_t);
464
465 static ssize_t xwrite(int, const char *, size_t);
466 static void *xmalloc(size_t);
467 static void *xrealloc(void *, size_t);
468 static char *xstrdup(char *);
469
470 static void usage(void);
471
472 static void (*handler[LASTEvent])(XEvent *) = {
473 [KeyPress] = kpress,
474 [ClientMessage] = cmessage,
475 [ConfigureNotify] = resize,
476 [VisibilityNotify] = visibility,
477 [UnmapNotify] = unmap,
478 [Expose] = expose,
479 [FocusIn] = focus,
480 [FocusOut] = focus,
481 [MotionNotify] = bmotion,
482 [ButtonPress] = bpress,
483 [ButtonRelease] = brelease,
484 [SelectionClear] = selclear,
485 [SelectionNotify] = selnotify,
486 [SelectionRequest] = selrequest,
487 };
488
489 /* Globals */
490 static DC dc;
491 static XWindow xw;
492 static Term term;
493 static CSIEscape csiescseq;
494 static STREscape strescseq;
495 static int cmdfd;
496 static pid_t pid;
497 static Selection sel;
498 static int iofd = STDOUT_FILENO;
499 static char **opt_cmd = NULL;
500 static char *opt_io = NULL;
501 static char *opt_title = NULL;
502 static char *opt_embed = NULL;
503 static char *opt_class = NULL;
504 static char *opt_font = NULL;
505 static int oldbutton = 3; /* button event on startup: 3 = release */
506
507 static char *usedfont = NULL;
508 static double usedfontsize = 0;
509 static double defaultfontsize = 0;
510
511 static uchar utfbyte[UTF_SIZ + 1] = {0x80, 0, 0xC0, 0xE0, 0xF0};
512 static uchar utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
513 static long utfmin[UTF_SIZ + 1] = { 0, 0, 0x80, 0x800, 0x10000};
514 static long utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
515
516 /* Font Ring Cache */
517 enum {
518 FRC_NORMAL,
519 FRC_ITALIC,
520 FRC_BOLD,
521 FRC_ITALICBOLD
522 };
523
524 typedef struct {
525 XftFont *font;
526 int flags;
527 } Fontcache;
528
529 /* Fontcache is an array now. A new font will be appended to the array. */
530 static Fontcache frc[16];
531 static int frclen = 0;
532
533 ssize_t
534 xwrite(int fd, const char *s, size_t len) {
535 size_t aux = len;
536
537 while(len > 0) {
538 ssize_t r = write(fd, s, len);
539 if(r < 0)
540 return r;
541 len -= r;
542 s += r;
543 }
544 return aux;
545 }
546
547 void *
548 xmalloc(size_t len) {
549 void *p = malloc(len);
550
551 if(!p)
552 die("Out of memory\n");
553
554 return p;
555 }
556
557 void *
558 xrealloc(void *p, size_t len) {
559 if((p = realloc(p, len)) == NULL)
560 die("Out of memory\n");
561
562 return p;
563 }
564
565 char *
566 xstrdup(char *s) {
567 if((s = strdup(s)) == NULL)
568 die("Out of memory\n");
569
570 return s;
571 }
572
573 size_t
574 utf8decode(char *c, long *u, size_t clen) {
575 size_t i, j, len, type;
576 long udecoded;
577
578 *u = UTF_INVALID;
579 if(!clen)
580 return 0;
581 udecoded = utf8decodebyte(c[0], &len);
582 if(!BETWEEN(len, 1, UTF_SIZ))
583 return 1;
584 for(i = 1, j = 1; i < clen && j < len; ++i, ++j) {
585 udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
586 if(type != 0)
587 return j;
588 }
589 if(j < len)
590 return 0;
591 *u = udecoded;
592 utf8validate(u, len);
593 return len;
594 }
595
596 long
597 utf8decodebyte(char c, size_t *i) {
598 for(*i = 0; *i < LEN(utfmask); ++(*i))
599 if(((uchar)c & utfmask[*i]) == utfbyte[*i])
600 return (uchar)c & ~utfmask[*i];
601 return 0;
602 }
603
604 size_t
605 utf8encode(long u, char *c, size_t clen) {
606 size_t len, i;
607
608 len = utf8validate(&u, 0);
609 if(clen < len)
610 return 0;
611 for(i = len - 1; i != 0; --i) {
612 c[i] = utf8encodebyte(u, 0);
613 u >>= 6;
614 }
615 c[0] = utf8encodebyte(u, len);
616 return len;
617 }
618
619 char
620 utf8encodebyte(long u, size_t i) {
621 return utfbyte[i] | (u & ~utfmask[i]);
622 }
623
624 size_t
625 utf8len(char *c) {
626 return utf8decode(c, &(long){0}, UTF_SIZ);
627 }
628
629 size_t
630 utf8validate(long *u, size_t i) {
631 if(!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF))
632 *u = UTF_INVALID;
633 for(i = 1; *u > utfmax[i]; ++i)
634 ;
635 return i;
636 }
637
638 static void
639 selinit(void) {
640 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
641 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
642 sel.mode = 0;
643 sel.ob.x = -1;
644 sel.clip = NULL;
645 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
646 if(sel.xtarget == None)
647 sel.xtarget = XA_STRING;
648 }
649
650 static int
651 x2col(int x) {
652 x -= borderpx;
653 x /= xw.cw;
654
655 return LIMIT(x, 0, term.col-1);
656 }
657
658 static int
659 y2row(int y) {
660 y -= borderpx;
661 y /= xw.ch;
662
663 return LIMIT(y, 0, term.row-1);
664 }
665
666 static int tlinelen(int y) {
667 int i = term.col;
668
669 if(term.line[y][i - 1].mode & ATTR_WRAP)
670 return i;
671
672 while(i > 0 && term.line[y][i - 1].c[0] == ' ')
673 --i;
674
675 return i;
676 }
677
678 static void
679 selnormalize(void) {
680 int i;
681
682 if(sel.ob.y == sel.oe.y || sel.type == SEL_RECTANGULAR) {
683 sel.nb.x = MIN(sel.ob.x, sel.oe.x);
684 sel.ne.x = MAX(sel.ob.x, sel.oe.x);
685 } else {
686 sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
687 sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
688 }
689 sel.nb.y = MIN(sel.ob.y, sel.oe.y);
690 sel.ne.y = MAX(sel.ob.y, sel.oe.y);
691
692 selsnap(sel.snap, &sel.nb.x, &sel.nb.y, -1);
693 selsnap(sel.snap, &sel.ne.x, &sel.ne.y, +1);
694
695 /* expand selection over line breaks */
696 if (sel.type == SEL_RECTANGULAR)
697 return;
698 i = tlinelen(sel.nb.y);
699 if (i < sel.nb.x)
700 sel.nb.x = i;
701 if (tlinelen(sel.ne.y) <= sel.ne.x)
702 sel.ne.x = term.col - 1;
703 }
704
705 static inline bool
706 selected(int x, int y) {
707 if(sel.type == SEL_RECTANGULAR)
708 return BETWEEN(y, sel.nb.y, sel.ne.y)
709 && BETWEEN(x, sel.nb.x, sel.ne.x);
710
711 return BETWEEN(y, sel.nb.y, sel.ne.y)
712 && (y != sel.nb.y || x >= sel.nb.x)
713 && (y != sel.ne.y || x <= sel.ne.x);
714 }
715
716 void
717 selsnap(int mode, int *x, int *y, int direction) {
718 int newx, newy, xt, yt;
719 bool delim, prevdelim;
720 Glyph *gp, *prevgp;
721
722 switch(mode) {
723 case SNAP_WORD:
724 /*
725 * Snap around if the word wraps around at the end or
726 * beginning of a line.
727 */
728 prevgp = &term.line[*y][*x];
729 prevdelim = strchr(worddelimiters, prevgp->c[0]) != NULL;
730 for(;;) {
731 newx = *x + direction;
732 newy = *y;
733 if(!BETWEEN(newx, 0, term.col - 1)) {
734 newy += direction;
735 newx = (newx + term.col) % term.col;
736 if (!BETWEEN(newy, 0, term.row - 1))
737 break;
738
739 if(direction > 0)
740 yt = *y, xt = *x;
741 else
742 yt = newy, xt = newx;
743 if(!(term.line[yt][xt].mode & ATTR_WRAP))
744 break;
745 }
746
747 if (newx >= tlinelen(newy))
748 break;
749
750 gp = &term.line[newy][newx];
751 delim = strchr(worddelimiters, gp->c[0]) != NULL;
752 if(!(gp->mode & ATTR_WDUMMY) && (delim != prevdelim
753 || (delim && gp->c[0] != prevgp->c[0])))
754 break;
755
756 *x = newx;
757 *y = newy;
758 prevgp = gp;
759 prevdelim = delim;
760 }
761 break;
762 case SNAP_LINE:
763 /*
764 * Snap around if the the previous line or the current one
765 * has set ATTR_WRAP at its end. Then the whole next or
766 * previous line will be selected.
767 */
768 *x = (direction < 0) ? 0 : term.col - 1;
769 if(direction < 0 && *y > 0) {
770 for(; *y > 0; *y += direction) {
771 if(!(term.line[*y-1][term.col-1].mode
772 & ATTR_WRAP)) {
773 break;
774 }
775 }
776 } else if(direction > 0 && *y < term.row-1) {
777 for(; *y < term.row; *y += direction) {
778 if(!(term.line[*y][term.col-1].mode
779 & ATTR_WRAP)) {
780 break;
781 }
782 }
783 }
784 break;
785 }
786 }
787
788 void
789 getbuttoninfo(XEvent *e) {
790 int type;
791 uint state = e->xbutton.state & ~(Button1Mask | forceselmod);
792
793 sel.alt = IS_SET(MODE_ALTSCREEN);
794
795 sel.oe.x = x2col(e->xbutton.x);
796 sel.oe.y = y2row(e->xbutton.y);
797 selnormalize();
798
799 sel.type = SEL_REGULAR;
800 for(type = 1; type < LEN(selmasks); ++type) {
801 if(match(selmasks[type], state)) {
802 sel.type = type;
803 break;
804 }
805 }
806 }
807
808 void
809 mousereport(XEvent *e) {
810 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
811 button = e->xbutton.button, state = e->xbutton.state,
812 len;
813 char buf[40];
814 static int ox, oy;
815
816 /* from urxvt */
817 if(e->xbutton.type == MotionNotify) {
818 if(x == ox && y == oy)
819 return;
820 if(!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
821 return;
822 /* MOUSE_MOTION: no reporting if no button is pressed */
823 if(IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
824 return;
825
826 button = oldbutton + 32;
827 ox = x;
828 oy = y;
829 } else {
830 if(!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
831 button = 3;
832 } else {
833 button -= Button1;
834 if(button >= 3)
835 button += 64 - 3;
836 }
837 if(e->xbutton.type == ButtonPress) {
838 oldbutton = button;
839 ox = x;
840 oy = y;
841 } else if(e->xbutton.type == ButtonRelease) {
842 oldbutton = 3;
843 /* MODE_MOUSEX10: no button release reporting */
844 if(IS_SET(MODE_MOUSEX10))
845 return;
846 if (button == 64 || button == 65)
847 return;
848 }
849 }
850
851 if(!IS_SET(MODE_MOUSEX10)) {
852 button += (state & ShiftMask ? 4 : 0)
853 + (state & Mod4Mask ? 8 : 0)
854 + (state & ControlMask ? 16 : 0);
855 }
856
857 len = 0;
858 if(IS_SET(MODE_MOUSESGR)) {
859 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
860 button, x+1, y+1,
861 e->xbutton.type == ButtonRelease ? 'm' : 'M');
862 } else if(x < 223 && y < 223) {
863 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
864 32+button, 32+x+1, 32+y+1);
865 } else {
866 return;
867 }
868
869 ttywrite(buf, len);
870 }
871
872 void
873 bpress(XEvent *e) {
874 struct timespec now;
875 Mousekey *mk;
876
877 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
878 mousereport(e);
879 return;
880 }
881
882 for(mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
883 if(e->xbutton.button == mk->b
884 && match(mk->mask, e->xbutton.state)) {
885 ttysend(mk->s, strlen(mk->s));
886 return;
887 }
888 }
889
890 if(e->xbutton.button == Button1) {
891 clock_gettime(CLOCK_MONOTONIC, &now);
892
893 /* Clear previous selection, logically and visually. */
894 selclear(NULL);
895 sel.mode = 1;
896 sel.type = SEL_REGULAR;
897 sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
898 sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
899
900 /*
901 * If the user clicks below predefined timeouts specific
902 * snapping behaviour is exposed.
903 */
904 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
905 sel.snap = SNAP_LINE;
906 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
907 sel.snap = SNAP_WORD;
908 } else {
909 sel.snap = 0;
910 }
911 selnormalize();
912
913 /*
914 * Draw selection, unless it's regular and we don't want to
915 * make clicks visible
916 */
917 if(sel.snap != 0) {
918 sel.mode++;
919 tsetdirt(sel.nb.y, sel.ne.y);
920 }
921 sel.tclick2 = sel.tclick1;
922 sel.tclick1 = now;
923 }
924 }
925
926 char *
927 getsel(void) {
928 char *str, *ptr;
929 int y, bufsize, size, lastx, linelen;
930 Glyph *gp, *last;
931
932 if(sel.ob.x == -1)
933 return NULL;
934
935 bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
936 ptr = str = xmalloc(bufsize);
937
938 /* append every set & selected glyph to the selection */
939 for(y = sel.nb.y; y < sel.ne.y + 1; y++) {
940 linelen = tlinelen(y);
941
942 if(sel.type == SEL_RECTANGULAR) {
943 gp = &term.line[y][sel.nb.x];
944 lastx = sel.ne.x;
945 } else {
946 gp = &term.line[y][sel.nb.y == y ? sel.nb.x : 0];
947 lastx = (sel.ne.y == y) ? sel.ne.x : term.col-1;
948 }
949 last = &term.line[y][MIN(lastx, linelen-1)];
950
951 for( ; gp <= last; ++gp) {
952 if(gp->mode & ATTR_WDUMMY)
953 continue;
954
955 size = utf8len(gp->c);
956 memcpy(ptr, gp->c, size);
957 ptr += size;
958 }
959
960 /*
961 * Copy and pasting of line endings is inconsistent
962 * in the inconsistent terminal and GUI world.
963 * The best solution seems like to produce '\n' when
964 * something is copied from st and convert '\n' to
965 * '\r', when something to be pasted is received by
966 * st.
967 * FIXME: Fix the computer world.
968 */
969 if((y < sel.ne.y || lastx >= linelen) && !(last->mode & ATTR_WRAP))
970 *ptr++ = '\n';
971 }
972 *ptr = 0;
973 return str;
974 }
975
976 void
977 selcopy(void) {
978 xsetsel(getsel());
979 }
980
981 void
982 selnotify(XEvent *e) {
983 ulong nitems, ofs, rem;
984 int format;
985 uchar *data, *last, *repl;
986 Atom type;
987
988 ofs = 0;
989 do {
990 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
991 False, AnyPropertyType, &type, &format,
992 &nitems, &rem, &data)) {
993 fprintf(stderr, "Clipboard allocation failed\n");
994 return;
995 }
996
997 /*
998 * As seen in getsel:
999 * Line endings are inconsistent in the terminal and GUI world
1000 * copy and pasting. When receiving some selection data,
1001 * replace all '\n' with '\r'.
1002 * FIXME: Fix the computer world.
1003 */
1004 repl = data;
1005 last = data + nitems * format / 8;
1006 while((repl = memchr(repl, '\n', last - repl))) {
1007 *repl++ = '\r';
1008 }
1009
1010 if(IS_SET(MODE_BRCKTPASTE))
1011 ttywrite("\033[200~", 6);
1012 ttysend((char *)data, nitems * format / 8);
1013 if(IS_SET(MODE_BRCKTPASTE))
1014 ttywrite("\033[201~", 6);
1015 XFree(data);
1016 /* number of 32-bit chunks returned */
1017 ofs += nitems * format / 32;
1018 } while(rem > 0);
1019 }
1020
1021 void
1022 selpaste(const Arg *dummy) {
1023 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
1024 xw.win, CurrentTime);
1025 }
1026
1027 void
1028 clippaste(const Arg *dummy) {
1029 Atom clipboard;
1030
1031 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1032 XConvertSelection(xw.dpy, clipboard, sel.xtarget, XA_PRIMARY,
1033 xw.win, CurrentTime);
1034 }
1035
1036 void
1037 selclear(XEvent *e) {
1038 if(sel.ob.x == -1)
1039 return;
1040 sel.ob.x = -1;
1041 tsetdirt(sel.nb.y, sel.ne.y);
1042 }
1043
1044 void
1045 selrequest(XEvent *e) {
1046 XSelectionRequestEvent *xsre;
1047 XSelectionEvent xev;
1048 Atom xa_targets, string;
1049
1050 xsre = (XSelectionRequestEvent *) e;
1051 xev.type = SelectionNotify;
1052 xev.requestor = xsre->requestor;
1053 xev.selection = xsre->selection;
1054 xev.target = xsre->target;
1055 xev.time = xsre->time;
1056 /* reject */
1057 xev.property = None;
1058
1059 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
1060 if(xsre->target == xa_targets) {
1061 /* respond with the supported type */
1062 string = sel.xtarget;
1063 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1064 XA_ATOM, 32, PropModeReplace,
1065 (uchar *) &string, 1);
1066 xev.property = xsre->property;
1067 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
1068 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1069 xsre->target, 8, PropModeReplace,
1070 (uchar *) sel.clip, strlen(sel.clip));
1071 xev.property = xsre->property;
1072 }
1073
1074 /* all done, send a notification to the listener */
1075 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
1076 fprintf(stderr, "Error sending SelectionNotify event\n");
1077 }
1078
1079 void
1080 xsetsel(char *str) {
1081 /* register the selection for both the clipboard and the primary */
1082 Atom clipboard;
1083
1084 free(sel.clip);
1085 sel.clip = str;
1086
1087 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
1088
1089 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1090 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
1091 }
1092
1093 void
1094 brelease(XEvent *e) {
1095 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1096 mousereport(e);
1097 return;
1098 }
1099
1100 if(e->xbutton.button == Button2) {
1101 selpaste(NULL);
1102 } else if(e->xbutton.button == Button1) {
1103 if(sel.mode < 2) {
1104 selclear(NULL);
1105 } else {
1106 getbuttoninfo(e);
1107 selcopy();
1108 }
1109 sel.mode = 0;
1110 tsetdirt(sel.nb.y, sel.ne.y);
1111 }
1112 }
1113
1114 void
1115 bmotion(XEvent *e) {
1116 int oldey, oldex, oldsby, oldsey;
1117
1118 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1119 mousereport(e);
1120 return;
1121 }
1122
1123 if(!sel.mode)
1124 return;
1125
1126 sel.mode++;
1127 oldey = sel.oe.y;
1128 oldex = sel.oe.x;
1129 oldsby = sel.nb.y;
1130 oldsey = sel.ne.y;
1131 getbuttoninfo(e);
1132
1133 if(oldey != sel.oe.y || oldex != sel.oe.x)
1134 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
1135 }
1136
1137 void
1138 die(const char *errstr, ...) {
1139 va_list ap;
1140
1141 va_start(ap, errstr);
1142 vfprintf(stderr, errstr, ap);
1143 va_end(ap);
1144 exit(EXIT_FAILURE);
1145 }
1146
1147 void
1148 execsh(void) {
1149 char **args, *sh, *prog;
1150 const struct passwd *pw;
1151 char buf[sizeof(long) * 8 + 1];
1152
1153 errno = 0;
1154 if((pw = getpwuid(getuid())) == NULL) {
1155 if(errno)
1156 die("getpwuid:%s\n", strerror(errno));
1157 else
1158 die("who are you?\n");
1159 }
1160
1161 sh = (pw->pw_shell[0]) ? pw->pw_shell : shell;
1162 if(opt_cmd)
1163 prog = opt_cmd[0];
1164 else if(utmp)
1165 prog = utmp;
1166 else
1167 prog = sh;
1168 args = (opt_cmd) ? opt_cmd : (char *[]) {prog, NULL};
1169
1170 snprintf(buf, sizeof(buf), "%lu", xw.win);
1171
1172 unsetenv("COLUMNS");
1173 unsetenv("LINES");
1174 unsetenv("TERMCAP");
1175 setenv("LOGNAME", pw->pw_name, 1);
1176 setenv("USER", pw->pw_name, 1);
1177 setenv("SHELL", sh, 1);
1178 setenv("HOME", pw->pw_dir, 1);
1179 setenv("TERM", termname, 1);
1180 setenv("WINDOWID", buf, 1);
1181
1182 signal(SIGCHLD, SIG_DFL);
1183 signal(SIGHUP, SIG_DFL);
1184 signal(SIGINT, SIG_DFL);
1185 signal(SIGQUIT, SIG_DFL);
1186 signal(SIGTERM, SIG_DFL);
1187 signal(SIGALRM, SIG_DFL);
1188
1189 execvp(prog, args);
1190 exit(EXIT_FAILURE);
1191 }
1192
1193 void
1194 sigchld(int a) {
1195 int stat, ret;
1196
1197 if(waitpid(pid, &stat, 0) < 0)
1198 die("Waiting for pid %hd failed: %s\n", pid, strerror(errno));
1199
1200 ret = WIFEXITED(stat) ? WEXITSTATUS(stat) : EXIT_FAILURE;
1201 if (ret != EXIT_SUCCESS)
1202 die("child finished with error '%d'\n", stat);
1203 exit(EXIT_SUCCESS);
1204 }
1205
1206 void
1207 ttynew(void) {
1208 int m, s;
1209 struct winsize w = {term.row, term.col, 0, 0};
1210
1211 /* seems to work fine on linux, openbsd and freebsd */
1212 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1213 die("openpty failed: %s\n", strerror(errno));
1214
1215 switch(pid = fork()) {
1216 case -1:
1217 die("fork failed\n");
1218 break;
1219 case 0:
1220 setsid(); /* create a new process group */
1221 dup2(s, STDIN_FILENO);
1222 dup2(s, STDOUT_FILENO);
1223 dup2(s, STDERR_FILENO);
1224 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1225 die("ioctl TIOCSCTTY failed: %s\n", strerror(errno));
1226 close(s);
1227 close(m);
1228 execsh();
1229 break;
1230 default:
1231 close(s);
1232 cmdfd = m;
1233 signal(SIGCHLD, sigchld);
1234 if(opt_io) {
1235 term.mode |= MODE_PRINT;
1236 iofd = (!strcmp(opt_io, "-")) ?
1237 STDOUT_FILENO :
1238 open(opt_io, O_WRONLY | O_CREAT, 0666);
1239 if(iofd < 0) {
1240 fprintf(stderr, "Error opening %s:%s\n",
1241 opt_io, strerror(errno));
1242 }
1243 }
1244 break;
1245 }
1246 }
1247
1248 void
1249 ttyread(void) {
1250 static char buf[BUFSIZ];
1251 static int buflen = 0;
1252 char *ptr;
1253 char s[UTF_SIZ];
1254 int charsize; /* size of utf8 char in bytes */
1255 long unicodep;
1256 int ret;
1257
1258 /* append read bytes to unprocessed bytes */
1259 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1260 die("Couldn't read from shell: %s\n", strerror(errno));
1261
1262 /* process every complete utf8 char */
1263 buflen += ret;
1264 ptr = buf;
1265 while((charsize = utf8decode(ptr, &unicodep, buflen))) {
1266 utf8encode(unicodep, s, UTF_SIZ);
1267 tputc(s, charsize);
1268 ptr += charsize;
1269 buflen -= charsize;
1270 }
1271
1272 /* keep any uncomplete utf8 char for the next call */
1273 memmove(buf, ptr, buflen);
1274 }
1275
1276 void
1277 ttywrite(const char *s, size_t n) {
1278 if(xwrite(cmdfd, s, n) == -1)
1279 die("write error on tty: %s\n", strerror(errno));
1280 }
1281
1282 void
1283 ttysend(char *s, size_t n) {
1284 ttywrite(s, n);
1285 if(IS_SET(MODE_ECHO))
1286 techo(s, n);
1287 }
1288
1289 void
1290 ttyresize(void) {
1291 struct winsize w;
1292
1293 w.ws_row = term.row;
1294 w.ws_col = term.col;
1295 w.ws_xpixel = xw.tw;
1296 w.ws_ypixel = xw.th;
1297 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1298 fprintf(stderr, "Couldn't set window size: %s\n", strerror(errno));
1299 }
1300
1301 int
1302 tattrset(int attr) {
1303 int i, j;
1304
1305 for(i = 0; i < term.row-1; i++) {
1306 for(j = 0; j < term.col-1; j++) {
1307 if(term.line[i][j].mode & attr)
1308 return 1;
1309 }
1310 }
1311
1312 return 0;
1313 }
1314
1315 void
1316 tsetdirt(int top, int bot) {
1317 int i;
1318
1319 LIMIT(top, 0, term.row-1);
1320 LIMIT(bot, 0, term.row-1);
1321
1322 for(i = top; i <= bot; i++)
1323 term.dirty[i] = 1;
1324 }
1325
1326 void
1327 tsetdirtattr(int attr) {
1328 int i, j;
1329
1330 for(i = 0; i < term.row-1; i++) {
1331 for(j = 0; j < term.col-1; j++) {
1332 if(term.line[i][j].mode & attr) {
1333 tsetdirt(i, i);
1334 break;
1335 }
1336 }
1337 }
1338 }
1339
1340 void
1341 tfulldirt(void) {
1342 tsetdirt(0, term.row-1);
1343 }
1344
1345 void
1346 tcursor(int mode) {
1347 static TCursor c[2];
1348 bool alt = IS_SET(MODE_ALTSCREEN);
1349
1350 if(mode == CURSOR_SAVE) {
1351 c[alt] = term.c;
1352 } else if(mode == CURSOR_LOAD) {
1353 term.c = c[alt];
1354 tmoveto(c[alt].x, c[alt].y);
1355 }
1356 }
1357
1358 void
1359 treset(void) {
1360 uint i;
1361
1362 term.c = (TCursor){{
1363 .mode = ATTR_NULL,
1364 .fg = defaultfg,
1365 .bg = defaultbg
1366 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1367
1368 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1369 for(i = tabspaces; i < term.col; i += tabspaces)
1370 term.tabs[i] = 1;
1371 term.top = 0;
1372 term.bot = term.row - 1;
1373 term.mode = MODE_WRAP;
1374 memset(term.trantbl, sizeof(term.trantbl), CS_USA);
1375 term.charset = 0;
1376
1377 for(i = 0; i < 2; i++) {
1378 tmoveto(0, 0);
1379 tcursor(CURSOR_SAVE);
1380 tclearregion(0, 0, term.col-1, term.row-1);
1381 tswapscreen();
1382 }
1383 }
1384
1385 void
1386 tnew(int col, int row) {
1387 term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } };
1388 tresize(col, row);
1389 term.numlock = 1;
1390
1391 treset();
1392 }
1393
1394 void
1395 tswapscreen(void) {
1396 Line *tmp = term.line;
1397
1398 term.line = term.alt;
1399 term.alt = tmp;
1400 term.mode ^= MODE_ALTSCREEN;
1401 tfulldirt();
1402 }
1403
1404 void
1405 tscrolldown(int orig, int n) {
1406 int i;
1407 Line temp;
1408
1409 LIMIT(n, 0, term.bot-orig+1);
1410
1411 tsetdirt(orig, term.bot-n);
1412 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1413
1414 for(i = term.bot; i >= orig+n; i--) {
1415 temp = term.line[i];
1416 term.line[i] = term.line[i-n];
1417 term.line[i-n] = temp;
1418 }
1419
1420 selscroll(orig, n);
1421 }
1422
1423 void
1424 tscrollup(int orig, int n) {
1425 int i;
1426 Line temp;
1427
1428 LIMIT(n, 0, term.bot-orig+1);
1429
1430 tclearregion(0, orig, term.col-1, orig+n-1);
1431 tsetdirt(orig+n, term.bot);
1432
1433 for(i = orig; i <= term.bot-n; i++) {
1434 temp = term.line[i];
1435 term.line[i] = term.line[i+n];
1436 term.line[i+n] = temp;
1437 }
1438
1439 selscroll(orig, -n);
1440 }
1441
1442 void
1443 selscroll(int orig, int n) {
1444 if(sel.ob.x == -1)
1445 return;
1446
1447 if(BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
1448 if((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
1449 selclear(NULL);
1450 return;
1451 }
1452 if(sel.type == SEL_RECTANGULAR) {
1453 if(sel.ob.y < term.top)
1454 sel.ob.y = term.top;
1455 if(sel.oe.y > term.bot)
1456 sel.oe.y = term.bot;
1457 } else {
1458 if(sel.ob.y < term.top) {
1459 sel.ob.y = term.top;
1460 sel.ob.x = 0;
1461 }
1462 if(sel.oe.y > term.bot) {
1463 sel.oe.y = term.bot;
1464 sel.oe.x = term.col;
1465 }
1466 }
1467 selnormalize();
1468 }
1469 }
1470
1471 void
1472 tnewline(int first_col) {
1473 int y = term.c.y;
1474
1475 if(y == term.bot) {
1476 tscrollup(term.top, 1);
1477 } else {
1478 y++;
1479 }
1480 tmoveto(first_col ? 0 : term.c.x, y);
1481 }
1482
1483 void
1484 csiparse(void) {
1485 char *p = csiescseq.buf, *np;
1486 long int v;
1487
1488 csiescseq.narg = 0;
1489 if(*p == '?') {
1490 csiescseq.priv = 1;
1491 p++;
1492 }
1493
1494 csiescseq.buf[csiescseq.len] = '\0';
1495 while(p < csiescseq.buf+csiescseq.len) {
1496 np = NULL;
1497 v = strtol(p, &np, 10);
1498 if(np == p)
1499 v = 0;
1500 if(v == LONG_MAX || v == LONG_MIN)
1501 v = -1;
1502 csiescseq.arg[csiescseq.narg++] = v;
1503 p = np;
1504 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1505 break;
1506 p++;
1507 }
1508 csiescseq.mode = *p;
1509 }
1510
1511 /* for absolute user moves, when decom is set */
1512 void
1513 tmoveato(int x, int y) {
1514 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1515 }
1516
1517 void
1518 tmoveto(int x, int y) {
1519 int miny, maxy;
1520
1521 if(term.c.state & CURSOR_ORIGIN) {
1522 miny = term.top;
1523 maxy = term.bot;
1524 } else {
1525 miny = 0;
1526 maxy = term.row - 1;
1527 }
1528 LIMIT(x, 0, term.col-1);
1529 LIMIT(y, miny, maxy);
1530 term.c.state &= ~CURSOR_WRAPNEXT;
1531 term.c.x = x;
1532 term.c.y = y;
1533 }
1534
1535 void
1536 tsetchar(char *c, Glyph *attr, int x, int y) {
1537 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1538 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1539 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1540 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1541 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1542 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1543 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1544 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1545 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1546 };
1547
1548 /*
1549 * The table is proudly stolen from rxvt.
1550 */
1551 if(term.trantbl[term.charset] == CS_GRAPHIC0) {
1552 if(BETWEEN(c[0], 0x41, 0x7e) && vt100_0[c[0] - 0x41]) {
1553 c = vt100_0[c[0] - 0x41];
1554 }
1555 }
1556
1557 if(term.line[y][x].mode & ATTR_WIDE) {
1558 if(x+1 < term.col) {
1559 term.line[y][x+1].c[0] = ' ';
1560 term.line[y][x+1].mode &= ~ATTR_WDUMMY;
1561 }
1562 } else if(term.line[y][x].mode & ATTR_WDUMMY) {
1563 term.line[y][x-1].c[0] = ' ';
1564 term.line[y][x-1].mode &= ~ATTR_WIDE;
1565 }
1566
1567 term.dirty[y] = 1;
1568 term.line[y][x] = *attr;
1569 memcpy(term.line[y][x].c, c, UTF_SIZ);
1570 }
1571
1572 void
1573 tclearregion(int x1, int y1, int x2, int y2) {
1574 int x, y, temp;
1575 Glyph *gp;
1576
1577 if(x1 > x2)
1578 temp = x1, x1 = x2, x2 = temp;
1579 if(y1 > y2)
1580 temp = y1, y1 = y2, y2 = temp;
1581
1582 LIMIT(x1, 0, term.col-1);
1583 LIMIT(x2, 0, term.col-1);
1584 LIMIT(y1, 0, term.row-1);
1585 LIMIT(y2, 0, term.row-1);
1586
1587 for(y = y1; y <= y2; y++) {
1588 term.dirty[y] = 1;
1589 for(x = x1; x <= x2; x++) {
1590 gp = &term.line[y][x];
1591 if(selected(x, y))
1592 selclear(NULL);
1593 gp->fg = term.c.attr.fg;
1594 gp->bg = term.c.attr.bg;
1595 gp->mode = 0;
1596 memcpy(gp->c, " ", 2);
1597 }
1598 }
1599 }
1600
1601 void
1602 tdeletechar(int n) {
1603 int dst, src, size;
1604 Glyph *line;
1605
1606 LIMIT(n, 0, term.col - term.c.x);
1607
1608 dst = term.c.x;
1609 src = term.c.x + n;
1610 size = term.col - src;
1611 line = term.line[term.c.y];
1612
1613 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1614 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1615 }
1616
1617 void
1618 tinsertblank(int n) {
1619 int dst, src, size;
1620 Glyph *line;
1621
1622 LIMIT(n, 0, term.col - term.c.x);
1623
1624 dst = term.c.x + n;
1625 src = term.c.x;
1626 size = term.col - dst;
1627 line = term.line[term.c.y];
1628
1629 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1630 tclearregion(src, term.c.y, dst - 1, term.c.y);
1631 }
1632
1633 void
1634 tinsertblankline(int n) {
1635 if(BETWEEN(term.c.y, term.top, term.bot))
1636 tscrolldown(term.c.y, n);
1637 }
1638
1639 void
1640 tdeleteline(int n) {
1641 if(BETWEEN(term.c.y, term.top, term.bot))
1642 tscrollup(term.c.y, n);
1643 }
1644
1645 int32_t
1646 tdefcolor(int *attr, int *npar, int l) {
1647 int32_t idx = -1;
1648 uint r, g, b;
1649
1650 switch (attr[*npar + 1]) {
1651 case 2: /* direct color in RGB space */
1652 if (*npar + 4 >= l) {
1653 fprintf(stderr,
1654 "erresc(38): Incorrect number of parameters (%d)\n",
1655 *npar);
1656 break;
1657 }
1658 r = attr[*npar + 2];
1659 g = attr[*npar + 3];
1660 b = attr[*npar + 4];
1661 *npar += 4;
1662 if(!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
1663 fprintf(stderr, "erresc: bad rgb color (%d,%d,%d)\n",
1664 r, g, b);
1665 else
1666 idx = TRUECOLOR(r, g, b);
1667 break;
1668 case 5: /* indexed color */
1669 if (*npar + 2 >= l) {
1670 fprintf(stderr,
1671 "erresc(38): Incorrect number of parameters (%d)\n",
1672 *npar);
1673 break;
1674 }
1675 *npar += 2;
1676 if(!BETWEEN(attr[*npar], 0, 255))
1677 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
1678 else
1679 idx = attr[*npar];
1680 break;
1681 case 0: /* implemented defined (only foreground) */
1682 case 1: /* transparent */
1683 case 3: /* direct color in CMY space */
1684 case 4: /* direct color in CMYK space */
1685 default:
1686 fprintf(stderr,
1687 "erresc(38): gfx attr %d unknown\n", attr[*npar]);
1688 break;
1689 }
1690
1691 return idx;
1692 }
1693
1694 void
1695 tsetattr(int *attr, int l) {
1696 int i;
1697 int32_t idx;
1698
1699 for(i = 0; i < l; i++) {
1700 switch(attr[i]) {
1701 case 0:
1702 term.c.attr.mode &= ~(
1703 ATTR_BOLD |
1704 ATTR_FAINT |
1705 ATTR_ITALIC |
1706 ATTR_UNDERLINE |
1707 ATTR_BLINK |
1708 ATTR_REVERSE |
1709 ATTR_INVISIBLE |
1710 ATTR_STRUCK );
1711 term.c.attr.fg = defaultfg;
1712 term.c.attr.bg = defaultbg;
1713 break;
1714 case 1:
1715 term.c.attr.mode |= ATTR_BOLD;
1716 break;
1717 case 2:
1718 term.c.attr.mode |= ATTR_FAINT;
1719 break;
1720 case 3:
1721 term.c.attr.mode |= ATTR_ITALIC;
1722 break;
1723 case 4:
1724 term.c.attr.mode |= ATTR_UNDERLINE;
1725 break;
1726 case 5: /* slow blink */
1727 /* FALLTHROUGH */
1728 case 6: /* rapid blink */
1729 term.c.attr.mode |= ATTR_BLINK;
1730 break;
1731 case 7:
1732 term.c.attr.mode |= ATTR_REVERSE;
1733 break;
1734 case 8:
1735 term.c.attr.mode |= ATTR_INVISIBLE;
1736 break;
1737 case 9:
1738 term.c.attr.mode |= ATTR_STRUCK;
1739 break;
1740 case 22:
1741 term.c.attr.mode &= ~(ATTR_BOLD | ATTR_FAINT);
1742 break;
1743 case 23:
1744 term.c.attr.mode &= ~ATTR_ITALIC;
1745 break;
1746 case 24:
1747 term.c.attr.mode &= ~ATTR_UNDERLINE;
1748 break;
1749 case 25:
1750 term.c.attr.mode &= ~ATTR_BLINK;
1751 break;
1752 case 27:
1753 term.c.attr.mode &= ~ATTR_REVERSE;
1754 break;
1755 case 28:
1756 term.c.attr.mode &= ~ATTR_INVISIBLE;
1757 break;
1758 case 29:
1759 term.c.attr.mode &= ~ATTR_STRUCK;
1760 break;
1761 case 38:
1762 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1763 term.c.attr.fg = idx;
1764 break;
1765 case 39:
1766 term.c.attr.fg = defaultfg;
1767 break;
1768 case 48:
1769 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1770 term.c.attr.bg = idx;
1771 break;
1772 case 49:
1773 term.c.attr.bg = defaultbg;
1774 break;
1775 default:
1776 if(BETWEEN(attr[i], 30, 37)) {
1777 term.c.attr.fg = attr[i] - 30;
1778 } else if(BETWEEN(attr[i], 40, 47)) {
1779 term.c.attr.bg = attr[i] - 40;
1780 } else if(BETWEEN(attr[i], 90, 97)) {
1781 term.c.attr.fg = attr[i] - 90 + 8;
1782 } else if(BETWEEN(attr[i], 100, 107)) {
1783 term.c.attr.bg = attr[i] - 100 + 8;
1784 } else {
1785 fprintf(stderr,
1786 "erresc(default): gfx attr %d unknown\n",
1787 attr[i]), csidump();
1788 }
1789 break;
1790 }
1791 }
1792 }
1793
1794 void
1795 tsetscroll(int t, int b) {
1796 int temp;
1797
1798 LIMIT(t, 0, term.row-1);
1799 LIMIT(b, 0, term.row-1);
1800 if(t > b) {
1801 temp = t;
1802 t = b;
1803 b = temp;
1804 }
1805 term.top = t;
1806 term.bot = b;
1807 }
1808
1809 void
1810 tsetmode(bool priv, bool set, int *args, int narg) {
1811 int *lim, mode;
1812 bool alt;
1813
1814 for(lim = args + narg; args < lim; ++args) {
1815 if(priv) {
1816 switch(*args) {
1817 case 1: /* DECCKM -- Cursor key */
1818 MODBIT(term.mode, set, MODE_APPCURSOR);
1819 break;
1820 case 5: /* DECSCNM -- Reverse video */
1821 mode = term.mode;
1822 MODBIT(term.mode, set, MODE_REVERSE);
1823 if(mode != term.mode)
1824 redraw(REDRAW_TIMEOUT);
1825 break;
1826 case 6: /* DECOM -- Origin */
1827 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1828 tmoveato(0, 0);
1829 break;
1830 case 7: /* DECAWM -- Auto wrap */
1831 MODBIT(term.mode, set, MODE_WRAP);
1832 break;
1833 case 0: /* Error (IGNORED) */
1834 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1835 case 3: /* DECCOLM -- Column (IGNORED) */
1836 case 4: /* DECSCLM -- Scroll (IGNORED) */
1837 case 8: /* DECARM -- Auto repeat (IGNORED) */
1838 case 18: /* DECPFF -- Printer feed (IGNORED) */
1839 case 19: /* DECPEX -- Printer extent (IGNORED) */
1840 case 42: /* DECNRCM -- National characters (IGNORED) */
1841 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1842 break;
1843 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1844 MODBIT(term.mode, !set, MODE_HIDE);
1845 break;
1846 case 9: /* X10 mouse compatibility mode */
1847 xsetpointermotion(0);
1848 MODBIT(term.mode, 0, MODE_MOUSE);
1849 MODBIT(term.mode, set, MODE_MOUSEX10);
1850 break;
1851 case 1000: /* 1000: report button press */
1852 xsetpointermotion(0);
1853 MODBIT(term.mode, 0, MODE_MOUSE);
1854 MODBIT(term.mode, set, MODE_MOUSEBTN);
1855 break;
1856 case 1002: /* 1002: report motion on button press */
1857 xsetpointermotion(0);
1858 MODBIT(term.mode, 0, MODE_MOUSE);
1859 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1860 break;
1861 case 1003: /* 1003: enable all mouse motions */
1862 xsetpointermotion(set);
1863 MODBIT(term.mode, 0, MODE_MOUSE);
1864 MODBIT(term.mode, set, MODE_MOUSEMANY);
1865 break;
1866 case 1004: /* 1004: send focus events to tty */
1867 MODBIT(term.mode, set, MODE_FOCUS);
1868 break;
1869 case 1006: /* 1006: extended reporting mode */
1870 MODBIT(term.mode, set, MODE_MOUSESGR);
1871 break;
1872 case 1034:
1873 MODBIT(term.mode, set, MODE_8BIT);
1874 break;
1875 case 1049: /* swap screen & set/restore cursor as xterm */
1876 if (!allowaltscreen)
1877 break;
1878 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1879 /* FALLTHROUGH */
1880 case 47: /* swap screen */
1881 case 1047:
1882 if (!allowaltscreen)
1883 break;
1884 alt = IS_SET(MODE_ALTSCREEN);
1885 if(alt) {
1886 tclearregion(0, 0, term.col-1,
1887 term.row-1);
1888 }
1889 if(set ^ alt) /* set is always 1 or 0 */
1890 tswapscreen();
1891 if(*args != 1049)
1892 break;
1893 /* FALLTHROUGH */
1894 case 1048:
1895 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1896 break;
1897 case 2004: /* 2004: bracketed paste mode */
1898 MODBIT(term.mode, set, MODE_BRCKTPASTE);
1899 break;
1900 /* Not implemented mouse modes. See comments there. */
1901 case 1001: /* mouse highlight mode; can hang the
1902 terminal by design when implemented. */
1903 case 1005: /* UTF-8 mouse mode; will confuse
1904 applications not supporting UTF-8
1905 and luit. */
1906 case 1015: /* urxvt mangled mouse mode; incompatible
1907 and can be mistaken for other control
1908 codes. */
1909 default:
1910 fprintf(stderr,
1911 "erresc: unknown private set/reset mode %d\n",
1912 *args);
1913 break;
1914 }
1915 } else {
1916 switch(*args) {
1917 case 0: /* Error (IGNORED) */
1918 break;
1919 case 2: /* KAM -- keyboard action */
1920 MODBIT(term.mode, set, MODE_KBDLOCK);
1921 break;
1922 case 4: /* IRM -- Insertion-replacement */
1923 MODBIT(term.mode, set, MODE_INSERT);
1924 break;
1925 case 12: /* SRM -- Send/Receive */
1926 MODBIT(term.mode, !set, MODE_ECHO);
1927 break;
1928 case 20: /* LNM -- Linefeed/new line */
1929 MODBIT(term.mode, set, MODE_CRLF);
1930 break;
1931 default:
1932 fprintf(stderr,
1933 "erresc: unknown set/reset mode %d\n",
1934 *args);
1935 break;
1936 }
1937 }
1938 }
1939 }
1940
1941 void
1942 csihandle(void) {
1943 char buf[40];
1944 int len;
1945
1946 switch(csiescseq.mode) {
1947 default:
1948 unknown:
1949 fprintf(stderr, "erresc: unknown csi ");
1950 csidump();
1951 /* die(""); */
1952 break;
1953 case '@': /* ICH -- Insert <n> blank char */
1954 DEFAULT(csiescseq.arg[0], 1);
1955 tinsertblank(csiescseq.arg[0]);
1956 break;
1957 case 'A': /* CUU -- Cursor <n> Up */
1958 DEFAULT(csiescseq.arg[0], 1);
1959 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1960 break;
1961 case 'B': /* CUD -- Cursor <n> Down */
1962 case 'e': /* VPR --Cursor <n> Down */
1963 DEFAULT(csiescseq.arg[0], 1);
1964 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1965 break;
1966 case 'i': /* MC -- Media Copy */
1967 switch(csiescseq.arg[0]) {
1968 case 0:
1969 tdump();
1970 break;
1971 case 1:
1972 tdumpline(term.c.y);
1973 break;
1974 case 2:
1975 tdumpsel();
1976 break;
1977 case 4:
1978 term.mode &= ~MODE_PRINT;
1979 break;
1980 case 5:
1981 term.mode |= MODE_PRINT;
1982 break;
1983 }
1984 break;
1985 case 'c': /* DA -- Device Attributes */
1986 if(csiescseq.arg[0] == 0)
1987 ttywrite(vtiden, sizeof(vtiden) - 1);
1988 break;
1989 case 'C': /* CUF -- Cursor <n> Forward */
1990 case 'a': /* HPR -- Cursor <n> Forward */
1991 DEFAULT(csiescseq.arg[0], 1);
1992 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1993 break;
1994 case 'D': /* CUB -- Cursor <n> Backward */
1995 DEFAULT(csiescseq.arg[0], 1);
1996 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1997 break;
1998 case 'E': /* CNL -- Cursor <n> Down and first col */
1999 DEFAULT(csiescseq.arg[0], 1);
2000 tmoveto(0, term.c.y+csiescseq.arg[0]);
2001 break;
2002 case 'F': /* CPL -- Cursor <n> Up and first col */
2003 DEFAULT(csiescseq.arg[0], 1);
2004 tmoveto(0, term.c.y-csiescseq.arg[0]);
2005 break;
2006 case 'g': /* TBC -- Tabulation clear */
2007 switch(csiescseq.arg[0]) {
2008 case 0: /* clear current tab stop */
2009 term.tabs[term.c.x] = 0;
2010 break;
2011 case 3: /* clear all the tabs */
2012 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
2013 break;
2014 default:
2015 goto unknown;
2016 }
2017 break;
2018 case 'G': /* CHA -- Move to <col> */
2019 case '`': /* HPA */
2020 DEFAULT(csiescseq.arg[0], 1);
2021 tmoveto(csiescseq.arg[0]-1, term.c.y);
2022 break;
2023 case 'H': /* CUP -- Move to <row> <col> */
2024 case 'f': /* HVP */
2025 DEFAULT(csiescseq.arg[0], 1);
2026 DEFAULT(csiescseq.arg[1], 1);
2027 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
2028 break;
2029 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
2030 DEFAULT(csiescseq.arg[0], 1);
2031 tputtab(csiescseq.arg[0]);
2032 break;
2033 case 'J': /* ED -- Clear screen */
2034 selclear(NULL);
2035 switch(csiescseq.arg[0]) {
2036 case 0: /* below */
2037 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
2038 if(term.c.y < term.row-1) {
2039 tclearregion(0, term.c.y+1, term.col-1,
2040 term.row-1);
2041 }
2042 break;
2043 case 1: /* above */
2044 if(term.c.y > 1)
2045 tclearregion(0, 0, term.col-1, term.c.y-1);
2046 tclearregion(0, term.c.y, term.c.x, term.c.y);
2047 break;
2048 case 2: /* all */
2049 tclearregion(0, 0, term.col-1, term.row-1);
2050 break;
2051 default:
2052 goto unknown;
2053 }
2054 break;
2055 case 'K': /* EL -- Clear line */
2056 switch(csiescseq.arg[0]) {
2057 case 0: /* right */
2058 tclearregion(term.c.x, term.c.y, term.col-1,
2059 term.c.y);
2060 break;
2061 case 1: /* left */
2062 tclearregion(0, term.c.y, term.c.x, term.c.y);
2063 break;
2064 case 2: /* all */
2065 tclearregion(0, term.c.y, term.col-1, term.c.y);
2066 break;
2067 }
2068 break;
2069 case 'S': /* SU -- Scroll <n> line up */
2070 DEFAULT(csiescseq.arg[0], 1);
2071 tscrollup(term.top, csiescseq.arg[0]);
2072 break;
2073 case 'T': /* SD -- Scroll <n> line down */
2074 DEFAULT(csiescseq.arg[0], 1);
2075 tscrolldown(term.top, csiescseq.arg[0]);
2076 break;
2077 case 'L': /* IL -- Insert <n> blank lines */
2078 DEFAULT(csiescseq.arg[0], 1);
2079 tinsertblankline(csiescseq.arg[0]);
2080 break;
2081 case 'l': /* RM -- Reset Mode */
2082 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
2083 break;
2084 case 'M': /* DL -- Delete <n> lines */
2085 DEFAULT(csiescseq.arg[0], 1);
2086 tdeleteline(csiescseq.arg[0]);
2087 break;
2088 case 'X': /* ECH -- Erase <n> char */
2089 DEFAULT(csiescseq.arg[0], 1);
2090 tclearregion(term.c.x, term.c.y,
2091 term.c.x + csiescseq.arg[0] - 1, term.c.y);
2092 break;
2093 case 'P': /* DCH -- Delete <n> char */
2094 DEFAULT(csiescseq.arg[0], 1);
2095 tdeletechar(csiescseq.arg[0]);
2096 break;
2097 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
2098 DEFAULT(csiescseq.arg[0], 1);
2099 tputtab(-csiescseq.arg[0]);
2100 break;
2101 case 'd': /* VPA -- Move to <row> */
2102 DEFAULT(csiescseq.arg[0], 1);
2103 tmoveato(term.c.x, csiescseq.arg[0]-1);
2104 break;
2105 case 'h': /* SM -- Set terminal mode */
2106 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
2107 break;
2108 case 'm': /* SGR -- Terminal attribute (color) */
2109 tsetattr(csiescseq.arg, csiescseq.narg);
2110 break;
2111 case 'n': /* DSR – Device Status Report (cursor position) */
2112 if (csiescseq.arg[0] == 6) {
2113 len = snprintf(buf, sizeof(buf),"\033[%i;%iR",
2114 term.c.y+1, term.c.x+1);
2115 ttywrite(buf, len);
2116 }
2117 break;
2118 case 'r': /* DECSTBM -- Set Scrolling Region */
2119 if(csiescseq.priv) {
2120 goto unknown;
2121 } else {
2122 DEFAULT(csiescseq.arg[0], 1);
2123 DEFAULT(csiescseq.arg[1], term.row);
2124 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
2125 tmoveato(0, 0);
2126 }
2127 break;
2128 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
2129 tcursor(CURSOR_SAVE);
2130 break;
2131 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
2132 tcursor(CURSOR_LOAD);
2133 break;
2134 }
2135 }
2136
2137 void
2138 csidump(void) {
2139 int i;
2140 uint c;
2141
2142 printf("ESC[");
2143 for(i = 0; i < csiescseq.len; i++) {
2144 c = csiescseq.buf[i] & 0xff;
2145 if(isprint(c)) {
2146 putchar(c);
2147 } else if(c == '\n') {
2148 printf("(\\n)");
2149 } else if(c == '\r') {
2150 printf("(\\r)");
2151 } else if(c == 0x1b) {
2152 printf("(\\e)");
2153 } else {
2154 printf("(%02x)", c);
2155 }
2156 }
2157 putchar('\n');
2158 }
2159
2160 void
2161 csireset(void) {
2162 memset(&csiescseq, 0, sizeof(csiescseq));
2163 }
2164
2165 void
2166 strhandle(void) {
2167 char *p = NULL;
2168 int j, narg, par;
2169
2170 term.esc &= ~(ESC_STR_END|ESC_STR);
2171 strparse();
2172 narg = strescseq.narg;
2173 par = atoi(strescseq.args[0]);
2174
2175 switch(strescseq.type) {
2176 case ']': /* OSC -- Operating System Command */
2177 switch(par) {
2178 case 0:
2179 case 1:
2180 case 2:
2181 if(narg > 1)
2182 xsettitle(strescseq.args[1]);
2183 return;
2184 case 4: /* color set */
2185 if(narg < 3)
2186 break;
2187 p = strescseq.args[2];
2188 /* FALLTHROUGH */
2189 case 104: /* color reset, here p = NULL */
2190 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2191 if(xsetcolorname(j, p)) {
2192 fprintf(stderr, "erresc: invalid color %s\n", p);
2193 } else {
2194 /*
2195 * TODO if defaultbg color is changed, borders
2196 * are dirty
2197 */
2198 redraw(0);
2199 }
2200 return;
2201 }
2202 break;
2203 case 'k': /* old title set compatibility */
2204 xsettitle(strescseq.args[0]);
2205 return;
2206 case 'P': /* DCS -- Device Control String */
2207 case '_': /* APC -- Application Program Command */
2208 case '^': /* PM -- Privacy Message */
2209 return;
2210 }
2211
2212 fprintf(stderr, "erresc: unknown str ");
2213 strdump();
2214 }
2215
2216 void
2217 strparse(void) {
2218 char *p = strescseq.buf;
2219
2220 strescseq.narg = 0;
2221 strescseq.buf[strescseq.len] = '\0';
2222 while(p && strescseq.narg < STR_ARG_SIZ)
2223 strescseq.args[strescseq.narg++] = strsep(&p, ";");
2224 }
2225
2226 void
2227 strdump(void) {
2228 int i;
2229 uint c;
2230
2231 printf("ESC%c", strescseq.type);
2232 for(i = 0; i < strescseq.len; i++) {
2233 c = strescseq.buf[i] & 0xff;
2234 if(c == '\0') {
2235 return;
2236 } else if(isprint(c)) {
2237 putchar(c);
2238 } else if(c == '\n') {
2239 printf("(\\n)");
2240 } else if(c == '\r') {
2241 printf("(\\r)");
2242 } else if(c == 0x1b) {
2243 printf("(\\e)");
2244 } else {
2245 printf("(%02x)", c);
2246 }
2247 }
2248 printf("ESC\\\n");
2249 }
2250
2251 void
2252 strreset(void) {
2253 memset(&strescseq, 0, sizeof(strescseq));
2254 }
2255
2256 void
2257 tprinter(char *s, size_t len) {
2258 if(iofd != -1 && xwrite(iofd, s, len) < 0) {
2259 fprintf(stderr, "Error writing in %s:%s\n",
2260 opt_io, strerror(errno));
2261 close(iofd);
2262 iofd = -1;
2263 }
2264 }
2265
2266 void
2267 toggleprinter(const Arg *arg) {
2268 term.mode ^= MODE_PRINT;
2269 }
2270
2271 void
2272 printscreen(const Arg *arg) {
2273 tdump();
2274 }
2275
2276 void
2277 printsel(const Arg *arg) {
2278 tdumpsel();
2279 }
2280
2281 void
2282 tdumpsel(void) {
2283 char *ptr;
2284
2285 if((ptr = getsel())) {
2286 tprinter(ptr, strlen(ptr));
2287 free(ptr);
2288 }
2289 }
2290
2291 void
2292 tdumpline(int n) {
2293 Glyph *bp, *end;
2294
2295 bp = &term.line[n][0];
2296 end = &bp[MIN(tlinelen(n), term.col) - 1];
2297 if(bp != end || bp->c[0] != ' ') {
2298 for( ;bp <= end; ++bp)
2299 tprinter(bp->c, utf8len(bp->c));
2300 }
2301 tprinter("\n", 1);
2302 }
2303
2304 void
2305 tdump(void) {
2306 int i;
2307
2308 for(i = 0; i < term.row; ++i)
2309 tdumpline(i);
2310 }
2311
2312 void
2313 tputtab(int n) {
2314 uint x = term.c.x;
2315
2316 if(n > 0) {
2317 while(x < term.col && n--)
2318 for(++x; x < term.col && !term.tabs[x]; ++x)
2319 /* nothing */ ;
2320 } else if(n < 0) {
2321 while(x > 0 && n++)
2322 for(--x; x > 0 && !term.tabs[x]; --x)
2323 /* nothing */ ;
2324 }
2325 tmoveto(x, term.c.y);
2326 }
2327
2328 void
2329 techo(char *buf, int len) {
2330 for(; len > 0; buf++, len--) {
2331 char c = *buf;
2332
2333 if(ISCONTROL((uchar) c)) { /* control code */
2334 if(c & 0x80) {
2335 c &= 0x7f;
2336 tputc("^", 1);
2337 tputc("[", 1);
2338 } else if(c != '\n' && c != '\r' && c != '\t') {
2339 c ^= 0x40;
2340 tputc("^", 1);
2341 }
2342 tputc(&c, 1);
2343 } else {
2344 break;
2345 }
2346 }
2347 if(len)
2348 tputc(buf, len);
2349 }
2350
2351 void
2352 tdeftran(char ascii) {
2353 static char cs[] = "0B";
2354 static int vcs[] = {CS_GRAPHIC0, CS_USA};
2355 char *p;
2356
2357 if((p = strchr(cs, ascii)) == NULL) {
2358 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2359 } else {
2360 term.trantbl[term.icharset] = vcs[p - cs];
2361 }
2362 }
2363
2364 void
2365 tdectest(char c) {
2366 static char E[UTF_SIZ] = "E";
2367 int x, y;
2368
2369 if(c == '8') { /* DEC screen alignment test. */
2370 for(x = 0; x < term.col; ++x) {
2371 for(y = 0; y < term.row; ++y)
2372 tsetchar(E, &term.c.attr, x, y);
2373 }
2374 }
2375 }
2376
2377 void
2378 tstrsequence(uchar c) {
2379 if (c & 0x80) {
2380 switch (c) {
2381 case 0x90: /* DCS -- Device Control String */
2382 c = 'P';
2383 break;
2384 case 0x9f: /* APC -- Application Program Command */
2385 c = '_';
2386 break;
2387 case 0x9e: /* PM -- Privacy Message */
2388 c = '^';
2389 break;
2390 case 0x9d: /* OSC -- Operating System Command */
2391 c = ']';
2392 break;
2393 }
2394 }
2395 strreset();
2396 strescseq.type = c;
2397 term.esc |= ESC_STR;
2398 return;
2399 }
2400
2401 void
2402 tcontrolcode(uchar ascii) {
2403 static char question[UTF_SIZ] = "?";
2404
2405 switch(ascii) {
2406 case '\t': /* HT */
2407 tputtab(1);
2408 return;
2409 case '\b': /* BS */
2410 tmoveto(term.c.x-1, term.c.y);
2411 return;
2412 case '\r': /* CR */
2413 tmoveto(0, term.c.y);
2414 return;
2415 case '\f': /* LF */
2416 case '\v': /* VT */
2417 case '\n': /* LF */
2418 /* go to first col if the mode is set */
2419 tnewline(IS_SET(MODE_CRLF));
2420 return;
2421 case '\a': /* BEL */
2422 if(term.esc & ESC_STR_END) {
2423 /* backwards compatibility to xterm */
2424 strhandle();
2425 } else {
2426 if(!(xw.state & WIN_FOCUSED))
2427 xseturgency(1);
2428 if (bellvolume)
2429 XkbBell(xw.dpy, xw.win, bellvolume, (Atom)NULL);
2430 }
2431 break;
2432 case '\033': /* ESC */
2433 csireset();
2434 term.esc &= ~(ESC_CSI|ESC_ALTCHARSET|ESC_TEST);
2435 term.esc |= ESC_START;
2436 return;
2437 case '\016': /* SO (LS1 -- Locking shift 1) */
2438 case '\017': /* SI (LS0 -- Locking shift 0) */
2439 term.charset = 1 - (ascii - '\016');
2440 return;
2441 case '\032': /* SUB */
2442 tsetchar(question, &term.c.attr, term.c.x, term.c.y);
2443 case '\030': /* CAN */
2444 csireset();
2445 break;
2446 case '\005': /* ENQ (IGNORED) */
2447 case '\000': /* NUL (IGNORED) */
2448 case '\021': /* XON (IGNORED) */
2449 case '\023': /* XOFF (IGNORED) */
2450 case 0177: /* DEL (IGNORED) */
2451 return;
2452 case 0x84: /* TODO: IND */
2453 break;
2454 case 0x85: /* NEL -- Next line */
2455 tnewline(1); /* always go to first col */
2456 break;
2457 case 0x88: /* HTS -- Horizontal tab stop */
2458 term.tabs[term.c.x] = 1;
2459 break;
2460 case 0x8d: /* TODO: RI */
2461 case 0x8e: /* TODO: SS2 */
2462 case 0x8f: /* TODO: SS3 */
2463 case 0x98: /* TODO: SOS */
2464 break;
2465 case 0x9a: /* DECID -- Identify Terminal */
2466 ttywrite(vtiden, sizeof(vtiden) - 1);
2467 break;
2468 case 0x9b: /* TODO: CSI */
2469 case 0x9c: /* TODO: ST */
2470 break;
2471 case 0x90: /* DCS -- Device Control String */
2472 case 0x9f: /* APC -- Application Program Command */
2473 case 0x9e: /* PM -- Privacy Message */
2474 case 0x9d: /* OSC -- Operating System Command */
2475 tstrsequence(ascii);
2476 return;
2477 }
2478 /* only CAN, SUB, \a and C1 chars interrupt a sequence */
2479 term.esc &= ~(ESC_STR_END|ESC_STR);
2480 return;
2481 }
2482
2483 /*
2484 * returns 1 when the sequence is finished and it hasn't to read
2485 * more characters for this sequence, otherwise 0
2486 */
2487 int
2488 eschandle(uchar ascii) {
2489 switch(ascii) {
2490 case '[':
2491 term.esc |= ESC_CSI;
2492 return 0;
2493 case '#':
2494 term.esc |= ESC_TEST;
2495 return 0;
2496 case 'P': /* DCS -- Device Control String */
2497 case '_': /* APC -- Application Program Command */
2498 case '^': /* PM -- Privacy Message */
2499 case ']': /* OSC -- Operating System Command */
2500 case 'k': /* old title set compatibility */
2501 tstrsequence(ascii);
2502 return 0;
2503 case 'n': /* LS2 -- Locking shift 2 */
2504 case 'o': /* LS3 -- Locking shift 3 */
2505 term.charset = 2 + (ascii - 'n');
2506 break;
2507 case '(': /* GZD4 -- set primary charset G0 */
2508 case ')': /* G1D4 -- set secondary charset G1 */
2509 case '*': /* G2D4 -- set tertiary charset G2 */
2510 case '+': /* G3D4 -- set quaternary charset G3 */
2511 term.icharset = ascii - '(';
2512 term.esc |= ESC_ALTCHARSET;
2513 return 0;
2514 case 'D': /* IND -- Linefeed */
2515 if(term.c.y == term.bot) {
2516 tscrollup(term.top, 1);
2517 } else {
2518 tmoveto(term.c.x, term.c.y+1);
2519 }
2520 break;
2521 case 'E': /* NEL -- Next line */
2522 tnewline(1); /* always go to first col */
2523 break;
2524 case 'H': /* HTS -- Horizontal tab stop */
2525 term.tabs[term.c.x] = 1;
2526 break;
2527 case 'M': /* RI -- Reverse index */
2528 if(term.c.y == term.top) {
2529 tscrolldown(term.top, 1);
2530 } else {
2531 tmoveto(term.c.x, term.c.y-1);
2532 }
2533 break;
2534 case 'Z': /* DECID -- Identify Terminal */
2535 ttywrite(vtiden, sizeof(vtiden) - 1);
2536 break;
2537 case 'c': /* RIS -- Reset to inital state */
2538 treset();
2539 xresettitle();
2540 xloadcols();
2541 break;
2542 case '=': /* DECPAM -- Application keypad */
2543 term.mode |= MODE_APPKEYPAD;
2544 break;
2545 case '>': /* DECPNM -- Normal keypad */
2546 term.mode &= ~MODE_APPKEYPAD;
2547 break;
2548 case '7': /* DECSC -- Save Cursor */
2549 tcursor(CURSOR_SAVE);
2550 break;
2551 case '8': /* DECRC -- Restore Cursor */
2552 tcursor(CURSOR_LOAD);
2553 break;
2554 case '\\': /* ST -- String Terminator */
2555 if(term.esc & ESC_STR_END)
2556 strhandle();
2557 break;
2558 default:
2559 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2560 (uchar) ascii, isprint(ascii)? ascii:'.');
2561 break;
2562 }
2563 return 1;
2564 }
2565
2566 void
2567 tputc(char *c, int len) {
2568 uchar ascii;
2569 bool control;
2570 long unicodep;
2571 int width;
2572 Glyph *gp;
2573
2574 if(len == 1) {
2575 width = 1;
2576 unicodep = ascii = *c;
2577 } else {
2578 utf8decode(c, &unicodep, UTF_SIZ);
2579 if ((width = wcwidth(unicodep)) == -1) {
2580 c = "\357\277\275"; /* UTF_INVALID */
2581 width = 1;
2582 }
2583 control = ISCONTROLC1(unicodep);
2584 ascii = unicodep;
2585 }
2586
2587 if(IS_SET(MODE_PRINT))
2588 tprinter(c, len);
2589 control = ISCONTROL(unicodep);
2590
2591 /*
2592 * STR sequence must be checked before anything else
2593 * because it uses all following characters until it
2594 * receives a ESC, a SUB, a ST or any other C1 control
2595 * character.
2596 */
2597 if(term.esc & ESC_STR) {
2598 if(width == 1 &&
2599 (ascii == '\a' || ascii == 030 ||
2600 ascii == 032 || ascii == 033 ||
2601 ISCONTROLC1(unicodep))) {
2602 term.esc &= ~(ESC_START|ESC_STR);
2603 term.esc |= ESC_STR_END;
2604 } else if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2605 memmove(&strescseq.buf[strescseq.len], c, len);
2606 strescseq.len += len;
2607 return;
2608 } else {
2609 /*
2610 * Here is a bug in terminals. If the user never sends
2611 * some code to stop the str or esc command, then st
2612 * will stop responding. But this is better than
2613 * silently failing with unknown characters. At least
2614 * then users will report back.
2615 *
2616 * In the case users ever get fixed, here is the code:
2617 */
2618 /*
2619 * term.esc = 0;
2620 * strhandle();
2621 */
2622 return;
2623 }
2624 }
2625
2626 /*
2627 * Actions of control codes must be performed as soon they arrive
2628 * because they can be embedded inside a control sequence, and
2629 * they must not cause conflicts with sequences.
2630 */
2631 if(control) {
2632 tcontrolcode(ascii);
2633 /*
2634 * control codes are not shown ever
2635 */
2636 return;
2637 } else if(term.esc & ESC_START) {
2638 if(term.esc & ESC_CSI) {
2639 csiescseq.buf[csiescseq.len++] = ascii;
2640 if(BETWEEN(ascii, 0x40, 0x7E)
2641 || csiescseq.len >= \
2642 sizeof(csiescseq.buf)-1) {
2643 term.esc = 0;
2644 csiparse();
2645 csihandle();
2646 }
2647 return;
2648 } else if(term.esc & ESC_ALTCHARSET) {
2649 tdeftran(ascii);
2650 } else if(term.esc & ESC_TEST) {
2651 tdectest(ascii);
2652 } else {
2653 if (!eschandle(ascii))
2654 return;
2655 /* sequence already finished */
2656 }
2657 term.esc = 0;
2658 /*
2659 * All characters which form part of a sequence are not
2660 * printed
2661 */
2662 return;
2663 }
2664 if(sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
2665 selclear(NULL);
2666
2667 gp = &term.line[term.c.y][term.c.x];
2668 if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2669 gp->mode |= ATTR_WRAP;
2670 tnewline(1);
2671 }
2672
2673 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col)
2674 memmove(gp+1, gp, (term.col - term.c.x - 1) * sizeof(Glyph));
2675
2676 if(term.c.x+width > term.col)
2677 tnewline(1);
2678
2679 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2680
2681 if(width == 2) {
2682 gp->mode |= ATTR_WIDE;
2683 if(term.c.x+1 < term.col) {
2684 gp[1].c[0] = '\0';
2685 gp[1].mode = ATTR_WDUMMY;
2686 }
2687 }
2688 if(term.c.x+width < term.col) {
2689 tmoveto(term.c.x+width, term.c.y);
2690 } else {
2691 term.c.state |= CURSOR_WRAPNEXT;
2692 }
2693 }
2694
2695 void
2696 tresize(int col, int row) {
2697 int i;
2698 int minrow = MIN(row, term.row);
2699 int mincol = MIN(col, term.col);
2700 int slide = term.c.y - row + 1;
2701 bool *bp;
2702 TCursor c;
2703
2704 if(col < 1 || row < 1) {
2705 fprintf(stderr,
2706 "tresize: error resizing to %dx%d\n", col, row);
2707 return;
2708 }
2709
2710 /* free unneeded rows */
2711 i = 0;
2712 if(slide > 0) {
2713 /*
2714 * slide screen to keep cursor where we expect it -
2715 * tscrollup would work here, but we can optimize to
2716 * memmove because we're freeing the earlier lines
2717 */
2718 for(/* i = 0 */; i < slide; i++) {
2719 free(term.line[i]);
2720 free(term.alt[i]);
2721 }
2722 memmove(term.line, term.line + slide, row * sizeof(Line));
2723 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2724 }
2725 for(i += row; i < term.row; i++) {
2726 free(term.line[i]);
2727 free(term.alt[i]);
2728 }
2729
2730 /* resize to new height */
2731 term.line = xrealloc(term.line, row * sizeof(Line));
2732 term.alt = xrealloc(term.alt, row * sizeof(Line));
2733 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2734 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2735
2736 /* resize each row to new width, zero-pad if needed */
2737 for(i = 0; i < minrow; i++) {
2738 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2739 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2740 }
2741
2742 /* allocate any new rows */
2743 for(/* i == minrow */; i < row; i++) {
2744 term.line[i] = xmalloc(col * sizeof(Glyph));
2745 term.alt[i] = xmalloc(col * sizeof(Glyph));
2746 }
2747 if(col > term.col) {
2748 bp = term.tabs + term.col;
2749
2750 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2751 while(--bp > term.tabs && !*bp)
2752 /* nothing */ ;
2753 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2754 *bp = 1;
2755 }
2756 /* update terminal size */
2757 term.col = col;
2758 term.row = row;
2759 /* reset scrolling region */
2760 tsetscroll(0, row-1);
2761 /* make use of the LIMIT in tmoveto */
2762 tmoveto(term.c.x, term.c.y);
2763 /* Clearing both screens (it makes dirty all lines) */
2764 c = term.c;
2765 for(i = 0; i < 2; i++) {
2766 if(mincol < col && 0 < minrow) {
2767 tclearregion(mincol, 0, col - 1, minrow - 1);
2768 }
2769 if(0 < col && minrow < row) {
2770 tclearregion(0, minrow, col - 1, row - 1);
2771 }
2772 tswapscreen();
2773 tcursor(CURSOR_LOAD);
2774 }
2775 term.c = c;
2776 }
2777
2778 void
2779 xresize(int col, int row) {
2780 xw.tw = MAX(1, col * xw.cw);
2781 xw.th = MAX(1, row * xw.ch);
2782
2783 XFreePixmap(xw.dpy, xw.buf);
2784 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2785 DefaultDepth(xw.dpy, xw.scr));
2786 XftDrawChange(xw.draw, xw.buf);
2787 xclear(0, 0, xw.w, xw.h);
2788 }
2789
2790 static inline ushort
2791 sixd_to_16bit(int x) {
2792 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2793 }
2794
2795 void
2796 xloadcols(void) {
2797 int i;
2798 XRenderColor color = { .alpha = 0xffff };
2799 static bool loaded;
2800 Color *cp;
2801
2802 if(loaded) {
2803 for (cp = dc.col; cp < dc.col + LEN(dc.col); ++cp)
2804 XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
2805 }
2806
2807 /* load colors [0-15] and [256-LEN(colorname)] (config.h) */
2808 for(i = 0; i < LEN(colorname); i++) {
2809 if(!colorname[i])
2810 continue;
2811 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2812 die("Could not allocate color '%s'\n", colorname[i]);
2813 }
2814 }
2815
2816 /* load colors [16-231] ; same colors as xterm */
2817 for(i = 16; i < 6*6*6+16; i++) {
2818 color.red = sixd_to_16bit( ((i-16)/36)%6 );
2819 color.green = sixd_to_16bit( ((i-16)/6) %6 );
2820 color.blue = sixd_to_16bit( ((i-16)/1) %6 );
2821 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i]))
2822 die("Could not allocate color %d\n", i);
2823 }
2824
2825 /* load colors [232-255] ; grayscale */
2826 for(; i < 256; i++) {
2827 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (i-(6*6*6+16));
2828 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i]))
2829 die("Could not allocate color %d\n", i);
2830 }
2831 loaded = true;
2832 }
2833
2834 int
2835 xsetcolorname(int x, const char *name) {
2836 XRenderColor color = { .alpha = 0xffff };
2837 Color ncolor;
2838
2839 if(!BETWEEN(x, 0, LEN(colorname)))
2840 return 1;
2841
2842 if(!name) {
2843 if(BETWEEN(x, 16, 16 + 215)) { /* 256 color */
2844 color.red = sixd_to_16bit( ((x-16)/36)%6 );
2845 color.green = sixd_to_16bit( ((x-16)/6) %6 );
2846 color.blue = sixd_to_16bit( ((x-16)/1) %6 );
2847 if(!XftColorAllocValue(xw.dpy, xw.vis,
2848 xw.cmap, &color, &ncolor)) {
2849 return 1;
2850 }
2851
2852 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2853 dc.col[x] = ncolor;
2854 return 0;
2855 } else if(BETWEEN(x, 16 + 216, 255)) { /* greyscale */
2856 color.red = color.green = color.blue = \
2857 0x0808 + 0x0a0a * (x - (16 + 216));
2858 if(!XftColorAllocValue(xw.dpy, xw.vis,
2859 xw.cmap, &color, &ncolor)) {
2860 return 1;
2861 }
2862
2863 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2864 dc.col[x] = ncolor;
2865 return 0;
2866 } else { /* system colors */
2867 name = colorname[x];
2868 }
2869 }
2870 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &ncolor))
2871 return 1;
2872
2873 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2874 dc.col[x] = ncolor;
2875 return 0;
2876 }
2877
2878 void
2879 xtermclear(int col1, int row1, int col2, int row2) {
2880 XftDrawRect(xw.draw,
2881 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2882 borderpx + col1 * xw.cw,
2883 borderpx + row1 * xw.ch,
2884 (col2-col1+1) * xw.cw,
2885 (row2-row1+1) * xw.ch);
2886 }
2887
2888 /*
2889 * Absolute coordinates.
2890 */
2891 void
2892 xclear(int x1, int y1, int x2, int y2) {
2893 XftDrawRect(xw.draw,
2894 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2895 x1, y1, x2-x1, y2-y1);
2896 }
2897
2898 void
2899 xhints(void) {
2900 XClassHint class = {opt_class ? opt_class : termname, termname};
2901 XWMHints wm = {.flags = InputHint, .input = 1};
2902 XSizeHints *sizeh = NULL;
2903
2904 sizeh = XAllocSizeHints();
2905
2906 sizeh->flags = PSize | PResizeInc | PBaseSize;
2907 sizeh->height = xw.h;
2908 sizeh->width = xw.w;
2909 sizeh->height_inc = xw.ch;
2910 sizeh->width_inc = xw.cw;
2911 sizeh->base_height = 2 * borderpx;
2912 sizeh->base_width = 2 * borderpx;
2913 if(xw.isfixed == True) {
2914 sizeh->flags |= PMaxSize | PMinSize;
2915 sizeh->min_width = sizeh->max_width = xw.w;
2916 sizeh->min_height = sizeh->max_height = xw.h;
2917 }
2918 if(xw.gm & (XValue|YValue)) {
2919 sizeh->flags |= USPosition | PWinGravity;
2920 sizeh->x = xw.l;
2921 sizeh->y = xw.t;
2922 sizeh->win_gravity = xgeommasktogravity(xw.gm);
2923 }
2924
2925 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
2926 &class);
2927 XFree(sizeh);
2928 }
2929
2930 int
2931 xgeommasktogravity(int mask) {
2932 switch(mask & (XNegative|YNegative)) {
2933 case 0:
2934 return NorthWestGravity;
2935 case XNegative:
2936 return NorthEastGravity;
2937 case YNegative:
2938 return SouthWestGravity;
2939 }
2940 return SouthEastGravity;
2941 }
2942
2943 int
2944 xloadfont(Font *f, FcPattern *pattern) {
2945 FcPattern *match;
2946 FcResult result;
2947
2948 match = FcFontMatch(NULL, pattern, &result);
2949 if(!match)
2950 return 1;
2951
2952 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2953 FcPatternDestroy(match);
2954 return 1;
2955 }
2956
2957 f->set = NULL;
2958 f->pattern = FcPatternDuplicate(pattern);
2959
2960 f->ascent = f->match->ascent;
2961 f->descent = f->match->descent;
2962 f->lbearing = 0;
2963 f->rbearing = f->match->max_advance_width;
2964
2965 f->height = f->ascent + f->descent;
2966 f->width = f->lbearing + f->rbearing;
2967
2968 return 0;
2969 }
2970
2971 void
2972 xloadfonts(char *fontstr, double fontsize) {
2973 FcPattern *pattern;
2974 FcResult r_sz, r_psz;
2975 double fontval;
2976 float ceilf(float);
2977
2978 if(fontstr[0] == '-') {
2979 pattern = XftXlfdParse(fontstr, False, False);
2980 } else {
2981 pattern = FcNameParse((FcChar8 *)fontstr);
2982 }
2983
2984 if(!pattern)
2985 die("st: can't open font %s\n", fontstr);
2986
2987 if(fontsize > 0) {
2988 FcPatternDel(pattern, FC_PIXEL_SIZE);
2989 FcPatternDel(pattern, FC_SIZE);
2990 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2991 usedfontsize = fontsize;
2992 } else {
2993 r_psz = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2994 r_sz = FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval);
2995 if(r_psz == FcResultMatch) {
2996 usedfontsize = fontval;
2997 } else if(r_sz == FcResultMatch) {
2998 usedfontsize = -1;
2999 } else {
3000 /*
3001 * Default font size is 12, if none given. This is to
3002 * have a known usedfontsize value.
3003 */
3004 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
3005 usedfontsize = 12;
3006 }
3007 defaultfontsize = usedfontsize;
3008 }
3009
3010 FcConfigSubstitute(0, pattern, FcMatchPattern);
3011 FcDefaultSubstitute(pattern);
3012
3013 if(xloadfont(&dc.font, pattern))
3014 die("st: can't open font %s\n", fontstr);
3015
3016 if(usedfontsize < 0) {
3017 FcPatternGetDouble(dc.font.match->pattern,
3018 FC_PIXEL_SIZE, 0, &fontval);
3019 usedfontsize = fontval;
3020 if(fontsize == 0)
3021 defaultfontsize = fontval;
3022 }
3023
3024 /* Setting character width and height. */
3025 xw.cw = ceilf(dc.font.width * cwscale);
3026 xw.ch = ceilf(dc.font.height * chscale);
3027
3028 FcPatternDel(pattern, FC_SLANT);
3029 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
3030 if(xloadfont(&dc.ifont, pattern))
3031 die("st: can't open font %s\n", fontstr);
3032
3033 FcPatternDel(pattern, FC_WEIGHT);
3034 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
3035 if(xloadfont(&dc.ibfont, pattern))
3036 die("st: can't open font %s\n", fontstr);
3037
3038 FcPatternDel(pattern, FC_SLANT);
3039 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
3040 if(xloadfont(&dc.bfont, pattern))
3041 die("st: can't open font %s\n", fontstr);
3042
3043 FcPatternDestroy(pattern);
3044 }
3045
3046 int
3047 xloadfontset(Font *f) {
3048 FcResult result;
3049
3050 if(!(f->set = FcFontSort(0, f->pattern, FcTrue, 0, &result)))
3051 return 1;
3052 return 0;
3053 }
3054
3055 void
3056 xunloadfont(Font *f) {
3057 XftFontClose(xw.dpy, f->match);
3058 FcPatternDestroy(f->pattern);
3059 if(f->set)
3060 FcFontSetDestroy(f->set);
3061 }
3062
3063 void
3064 xunloadfonts(void) {
3065 /* Free the loaded fonts in the font cache. */
3066 while(frclen > 0)
3067 XftFontClose(xw.dpy, frc[--frclen].font);
3068
3069 xunloadfont(&dc.font);
3070 xunloadfont(&dc.bfont);
3071 xunloadfont(&dc.ifont);
3072 xunloadfont(&dc.ibfont);
3073 }
3074
3075 void
3076 xzoom(const Arg *arg) {
3077 Arg larg;
3078
3079 larg.i = usedfontsize + arg->i;
3080 xzoomabs(&larg);
3081 }
3082
3083 void
3084 xzoomabs(const Arg *arg) {
3085 xunloadfonts();
3086 xloadfonts(usedfont, arg->i);
3087 cresize(0, 0);
3088 redraw(0);
3089 xhints();
3090 }
3091
3092 void
3093 xzoomreset(const Arg *arg) {
3094 Arg larg;
3095
3096 if(defaultfontsize > 0) {
3097 larg.i = defaultfontsize;
3098 xzoomabs(&larg);
3099 }
3100 }
3101
3102 void
3103 xinit(void) {
3104 XGCValues gcvalues;
3105 Cursor cursor;
3106 Window parent;
3107 pid_t thispid = getpid();
3108
3109 if(!(xw.dpy = XOpenDisplay(NULL)))
3110 die("Can't open display\n");
3111 xw.scr = XDefaultScreen(xw.dpy);
3112 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
3113
3114 /* font */
3115 if(!FcInit())
3116 die("Could not init fontconfig.\n");
3117
3118 usedfont = (opt_font == NULL)? font : opt_font;
3119 xloadfonts(usedfont, 0);
3120
3121 /* colors */
3122 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
3123 xloadcols();
3124
3125 /* adjust fixed window geometry */
3126 xw.w = 2 * borderpx + term.col * xw.cw;
3127 xw.h = 2 * borderpx + term.row * xw.ch;
3128 if(xw.gm & XNegative)
3129 xw.l += DisplayWidth(xw.dpy, xw.scr) - xw.w - 2;
3130 if(xw.gm & YNegative)
3131 xw.t += DisplayWidth(xw.dpy, xw.scr) - xw.h - 2;
3132
3133 /* Events */
3134 xw.attrs.background_pixel = dc.col[defaultbg].pixel;
3135 xw.attrs.border_pixel = dc.col[defaultbg].pixel;
3136 xw.attrs.bit_gravity = NorthWestGravity;
3137 xw.attrs.event_mask = FocusChangeMask | KeyPressMask
3138 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
3139 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
3140 xw.attrs.colormap = xw.cmap;
3141
3142 if (!(opt_embed && (parent = strtol(opt_embed, NULL, 0))))
3143 parent = XRootWindow(xw.dpy, xw.scr);
3144 xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
3145 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
3146 xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
3147 | CWEventMask | CWColormap, &xw.attrs);
3148
3149 memset(&gcvalues, 0, sizeof(gcvalues));
3150 gcvalues.graphics_exposures = False;
3151 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
3152 &gcvalues);
3153 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
3154 DefaultDepth(xw.dpy, xw.scr));
3155 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
3156 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
3157
3158 /* Xft rendering context */
3159 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
3160
3161 /* input methods */
3162 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3163 XSetLocaleModifiers("@im=local");
3164 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3165 XSetLocaleModifiers("@im=");
3166 if((xw.xim = XOpenIM(xw.dpy,
3167 NULL, NULL, NULL)) == NULL) {
3168 die("XOpenIM failed. Could not open input"
3169 " device.\n");
3170 }
3171 }
3172 }
3173 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
3174 | XIMStatusNothing, XNClientWindow, xw.win,
3175 XNFocusWindow, xw.win, NULL);
3176 if(xw.xic == NULL)
3177 die("XCreateIC failed. Could not obtain input method.\n");
3178
3179 /* white cursor, black outline */
3180 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
3181 XDefineCursor(xw.dpy, xw.win, cursor);
3182 XRecolorCursor(xw.dpy, cursor,
3183 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
3184 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
3185
3186 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
3187 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
3188 xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
3189 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
3190
3191 xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
3192 XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
3193 PropModeReplace, (uchar *)&thispid, 1);
3194
3195 xresettitle();
3196 XMapWindow(xw.dpy, xw.win);
3197 xhints();
3198 XSync(xw.dpy, False);
3199 }
3200
3201 void
3202 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
3203 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
3204 width = charlen * xw.cw, xp, i;
3205 int frcflags;
3206 int u8fl, u8fblen, u8cblen, doesexist;
3207 char *u8c, *u8fs;
3208 long unicodep;
3209 Font *font = &dc.font;
3210 FcResult fcres;
3211 FcPattern *fcpattern, *fontpattern;
3212 FcFontSet *fcsets[] = { NULL };
3213 FcCharSet *fccharset;
3214 Color *fg, *bg, *temp, revfg, revbg, truefg, truebg;
3215 XRenderColor colfg, colbg;
3216 XRectangle r;
3217 int oneatatime;
3218
3219 frcflags = FRC_NORMAL;
3220
3221 if(base.mode & ATTR_ITALIC) {
3222 if(base.fg == defaultfg)
3223 base.fg = defaultitalic;
3224 font = &dc.ifont;
3225 frcflags = FRC_ITALIC;
3226 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
3227 if(base.fg == defaultfg)
3228 base.fg = defaultitalic;
3229 font = &dc.ibfont;
3230 frcflags = FRC_ITALICBOLD;
3231 } else if(base.mode & ATTR_UNDERLINE) {
3232 if(base.fg == defaultfg)
3233 base.fg = defaultunderline;
3234 }
3235
3236 if(IS_TRUECOL(base.fg)) {
3237 colfg.alpha = 0xffff;
3238 colfg.red = TRUERED(base.fg);
3239 colfg.green = TRUEGREEN(base.fg);
3240 colfg.blue = TRUEBLUE(base.fg);
3241 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
3242 fg = &truefg;
3243 } else {
3244 fg = &dc.col[base.fg];
3245 }
3246
3247 if(IS_TRUECOL(base.bg)) {
3248 colbg.alpha = 0xffff;
3249 colbg.green = TRUEGREEN(base.bg);
3250 colbg.red = TRUERED(base.bg);
3251 colbg.blue = TRUEBLUE(base.bg);
3252 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
3253 bg = &truebg;
3254 } else {
3255 bg = &dc.col[base.bg];
3256 }
3257
3258 if(base.mode & ATTR_BOLD) {
3259 /*
3260 * change basic system colors [0-7]
3261 * to bright system colors [8-15]
3262 */
3263 if(BETWEEN(base.fg, 0, 7) && !(base.mode & ATTR_FAINT))
3264 fg = &dc.col[base.fg + 8];
3265
3266 if(base.mode & ATTR_ITALIC) {
3267 font = &dc.ibfont;
3268 frcflags = FRC_ITALICBOLD;
3269 } else {
3270 font = &dc.bfont;
3271 frcflags = FRC_BOLD;
3272 }
3273 }
3274
3275 if(IS_SET(MODE_REVERSE)) {
3276 if(fg == &dc.col[defaultfg]) {
3277 fg = &dc.col[defaultbg];
3278 } else {
3279 colfg.red = ~fg->color.red;
3280 colfg.green = ~fg->color.green;
3281 colfg.blue = ~fg->color.blue;
3282 colfg.alpha = fg->color.alpha;
3283 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
3284 &revfg);
3285 fg = &revfg;
3286 }
3287
3288 if(bg == &dc.col[defaultbg]) {
3289 bg = &dc.col[defaultfg];
3290 } else {
3291 colbg.red = ~bg->color.red;
3292 colbg.green = ~bg->color.green;
3293 colbg.blue = ~bg->color.blue;
3294 colbg.alpha = bg->color.alpha;
3295 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
3296 &revbg);
3297 bg = &revbg;
3298 }
3299 }
3300
3301 if(base.mode & ATTR_REVERSE) {
3302 temp = fg;
3303 fg = bg;
3304 bg = temp;
3305 }
3306
3307 if(base.mode & ATTR_FAINT && !(base.mode & ATTR_BOLD)) {
3308 colfg.red = fg->color.red / 2;
3309 colfg.green = fg->color.green / 2;
3310 colfg.blue = fg->color.blue / 2;
3311 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
3312 fg = &revfg;
3313 }
3314
3315 if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
3316 fg = bg;
3317
3318 if(base.mode & ATTR_INVISIBLE)
3319 fg = bg;
3320
3321 /* Intelligent cleaning up of the borders. */
3322 if(x == 0) {
3323 xclear(0, (y == 0)? 0 : winy, borderpx,
3324 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
3325 }
3326 if(x + charlen >= term.col) {
3327 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
3328 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
3329 }
3330 if(y == 0)
3331 xclear(winx, 0, winx + width, borderpx);
3332 if(y == term.row-1)
3333 xclear(winx, winy + xw.ch, winx + width, xw.h);
3334
3335 /* Clean up the region we want to draw to. */
3336 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
3337
3338 /* Set the clip region because Xft is sometimes dirty. */
3339 r.x = 0;
3340 r.y = 0;
3341 r.height = xw.ch;
3342 r.width = width;
3343 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
3344
3345 for(xp = winx; bytelen > 0;) {
3346 /*
3347 * Search for the range in the to be printed string of glyphs
3348 * that are in the main font. Then print that range. If
3349 * some glyph is found that is not in the font, do the
3350 * fallback dance.
3351 */
3352 u8fs = s;
3353 u8fblen = 0;
3354 u8fl = 0;
3355 oneatatime = font->width != xw.cw;
3356 for(;;) {
3357 u8c = s;
3358 u8cblen = utf8decode(s, &unicodep, UTF_SIZ);
3359 s += u8cblen;
3360 bytelen -= u8cblen;
3361
3362 doesexist = XftCharExists(xw.dpy, font->match, unicodep);
3363 if(doesexist) {
3364 u8fl++;
3365 u8fblen += u8cblen;
3366 if(!oneatatime && bytelen > 0)
3367 continue;
3368 }
3369
3370 if(u8fl > 0) {
3371 XftDrawStringUtf8(xw.draw, fg,
3372 font->match, xp,
3373 winy + font->ascent,
3374 (FcChar8 *)u8fs,
3375 u8fblen);
3376 xp += xw.cw * u8fl;
3377 }
3378 break;
3379 }
3380 if(doesexist) {
3381 if(oneatatime)
3382 continue;
3383 break;
3384 }
3385
3386 /* Search the font cache. */
3387 for(i = 0; i < frclen; i++) {
3388 if(XftCharExists(xw.dpy, frc[i].font, unicodep)
3389 && frc[i].flags == frcflags) {
3390 break;
3391 }
3392 }
3393
3394 /* Nothing was found. */
3395 if(i >= frclen) {
3396 if(!font->set)
3397 xloadfontset(font);
3398 fcsets[0] = font->set;
3399
3400 /*
3401 * Nothing was found in the cache. Now use
3402 * some dozen of Fontconfig calls to get the
3403 * font for one single character.
3404 *
3405 * Xft and fontconfig are design failures.
3406 */
3407 fcpattern = FcPatternDuplicate(font->pattern);
3408 fccharset = FcCharSetCreate();
3409
3410 FcCharSetAddChar(fccharset, unicodep);
3411 FcPatternAddCharSet(fcpattern, FC_CHARSET,
3412 fccharset);
3413 FcPatternAddBool(fcpattern, FC_SCALABLE,
3414 FcTrue);
3415
3416 FcConfigSubstitute(0, fcpattern,
3417 FcMatchPattern);
3418 FcDefaultSubstitute(fcpattern);
3419
3420 fontpattern = FcFontSetMatch(0, fcsets,
3421 FcTrue, fcpattern, &fcres);
3422
3423 /*
3424 * Overwrite or create the new cache entry.
3425 */
3426 if(frclen >= LEN(frc)) {
3427 frclen = LEN(frc) - 1;
3428 XftFontClose(xw.dpy, frc[frclen].font);
3429 }
3430
3431 frc[frclen].font = XftFontOpenPattern(xw.dpy,
3432 fontpattern);
3433 frc[frclen].flags = frcflags;
3434
3435 i = frclen;
3436 frclen++;
3437
3438 FcPatternDestroy(fcpattern);
3439 FcCharSetDestroy(fccharset);
3440 }
3441
3442 XftDrawStringUtf8(xw.draw, fg, frc[i].font,
3443 xp, winy + frc[i].font->ascent,
3444 (FcChar8 *)u8c, u8cblen);
3445
3446 xp += xw.cw * wcwidth(unicodep);
3447 }
3448
3449 /*
3450 * This is how the loop above actually should be. Why does the
3451 * application have to care about font details?
3452 *
3453 * I have to repeat: Xft and Fontconfig are design failures.
3454 */
3455 /*
3456 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
3457 winy + font->ascent, (FcChar8 *)s, bytelen);
3458 */
3459
3460 if(base.mode & ATTR_UNDERLINE) {
3461 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
3462 width, 1);
3463 }
3464
3465 if(base.mode & ATTR_STRUCK) {
3466 XftDrawRect(xw.draw, fg, winx, winy + 2 * font->ascent / 3,
3467 width, 1);
3468 }
3469
3470 /* Reset clip to none. */
3471 XftDrawSetClip(xw.draw, 0);
3472 }
3473
3474 void
3475 xdrawcursor(void) {
3476 static int oldx = 0, oldy = 0;
3477 int sl, width, curx;
3478 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
3479
3480 LIMIT(oldx, 0, term.col-1);
3481 LIMIT(oldy, 0, term.row-1);
3482
3483 curx = term.c.x;
3484
3485 /* adjust position if in dummy */
3486 if(term.line[oldy][oldx].mode & ATTR_WDUMMY)
3487 oldx--;
3488 if(term.line[term.c.y][curx].mode & ATTR_WDUMMY)
3489 curx--;
3490
3491 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
3492
3493 /* remove the old cursor */
3494 sl = utf8len(term.line[oldy][oldx].c);
3495 width = (term.line[oldy][oldx].mode & ATTR_WIDE)? 2 : 1;
3496 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
3497 oldy, width, sl);
3498
3499 if(IS_SET(MODE_HIDE))
3500 return;
3501
3502 /* draw the new one */
3503 if(xw.state & WIN_FOCUSED) {
3504 if(IS_SET(MODE_REVERSE)) {
3505 g.mode |= ATTR_REVERSE;
3506 g.fg = defaultcs;
3507 g.bg = defaultfg;
3508 }
3509
3510 sl = utf8len(g.c);
3511 width = (term.line[term.c.y][curx].mode & ATTR_WIDE)\
3512 ? 2 : 1;
3513 xdraws(g.c, g, term.c.x, term.c.y, width, sl);
3514 } else {
3515 XftDrawRect(xw.draw, &dc.col[defaultcs],
3516 borderpx + curx * xw.cw,
3517 borderpx + term.c.y * xw.ch,
3518 xw.cw - 1, 1);
3519 XftDrawRect(xw.draw, &dc.col[defaultcs],
3520 borderpx + curx * xw.cw,
3521 borderpx + term.c.y * xw.ch,
3522 1, xw.ch - 1);
3523 XftDrawRect(xw.draw, &dc.col[defaultcs],
3524 borderpx + (curx + 1) * xw.cw - 1,
3525 borderpx + term.c.y * xw.ch,
3526 1, xw.ch - 1);
3527 XftDrawRect(xw.draw, &dc.col[defaultcs],
3528 borderpx + curx * xw.cw,
3529 borderpx + (term.c.y + 1) * xw.ch - 1,
3530 xw.cw, 1);
3531 }
3532 oldx = curx, oldy = term.c.y;
3533 }
3534
3535
3536 void
3537 xsettitle(char *p) {
3538 XTextProperty prop;
3539
3540 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3541 &prop);
3542 XSetWMName(xw.dpy, xw.win, &prop);
3543 XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
3544 XFree(prop.value);
3545 }
3546
3547 void
3548 xresettitle(void) {
3549 xsettitle(opt_title ? opt_title : "st");
3550 }
3551
3552 void
3553 redraw(int timeout) {
3554 struct timespec tv = {0, timeout * 1000};
3555
3556 tfulldirt();
3557 draw();
3558
3559 if(timeout > 0) {
3560 nanosleep(&tv, NULL);
3561 XSync(xw.dpy, False); /* necessary for a good tput flash */
3562 }
3563 }
3564
3565 void
3566 draw(void) {
3567 drawregion(0, 0, term.col, term.row);
3568 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3569 xw.h, 0, 0);
3570 XSetForeground(xw.dpy, dc.gc,
3571 dc.col[IS_SET(MODE_REVERSE)?
3572 defaultfg : defaultbg].pixel);
3573 }
3574
3575 void
3576 drawregion(int x1, int y1, int x2, int y2) {
3577 int ic, ib, x, y, ox, sl;
3578 Glyph base, new;
3579 char buf[DRAW_BUF_SIZ];
3580 bool ena_sel = sel.ob.x != -1 && sel.alt == IS_SET(MODE_ALTSCREEN);
3581 long unicodep;
3582
3583 if(!(xw.state & WIN_VISIBLE))
3584 return;
3585
3586 for(y = y1; y < y2; y++) {
3587 if(!term.dirty[y])
3588 continue;
3589
3590 xtermclear(0, y, term.col, y);
3591 term.dirty[y] = 0;
3592 base = term.line[y][0];
3593 ic = ib = ox = 0;
3594 for(x = x1; x < x2; x++) {
3595 new = term.line[y][x];
3596 if(new.mode == ATTR_WDUMMY)
3597 continue;
3598 if(ena_sel && selected(x, y))
3599 new.mode ^= ATTR_REVERSE;
3600 if(ib > 0 && (ATTRCMP(base, new)
3601 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3602 xdraws(buf, base, ox, y, ic, ib);
3603 ic = ib = 0;
3604 }
3605 if(ib == 0) {
3606 ox = x;
3607 base = new;
3608 }
3609
3610 sl = utf8decode(new.c, &unicodep, UTF_SIZ);
3611 memcpy(buf+ib, new.c, sl);
3612 ib += sl;
3613 ic += (new.mode & ATTR_WIDE)? 2 : 1;
3614 }
3615 if(ib > 0)
3616 xdraws(buf, base, ox, y, ic, ib);
3617 }
3618 xdrawcursor();
3619 }
3620
3621 void
3622 expose(XEvent *ev) {
3623 XExposeEvent *e = &ev->xexpose;
3624
3625 if(xw.state & WIN_REDRAW) {
3626 if(!e->count)
3627 xw.state &= ~WIN_REDRAW;
3628 }
3629 redraw(0);
3630 }
3631
3632 void
3633 visibility(XEvent *ev) {
3634 XVisibilityEvent *e = &ev->xvisibility;
3635
3636 if(e->state == VisibilityFullyObscured) {
3637 xw.state &= ~WIN_VISIBLE;
3638 } else if(!(xw.state & WIN_VISIBLE)) {
3639 /* need a full redraw for next Expose, not just a buf copy */
3640 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3641 }
3642 }
3643
3644 void
3645 unmap(XEvent *ev) {
3646 xw.state &= ~WIN_VISIBLE;
3647 }
3648
3649 void
3650 xsetpointermotion(int set) {
3651 MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
3652 XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
3653 }
3654
3655 void
3656 xseturgency(int add) {
3657 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3658
3659 MODBIT(h->flags, add, XUrgencyHint);
3660 XSetWMHints(xw.dpy, xw.win, h);
3661 XFree(h);
3662 }
3663
3664 void
3665 focus(XEvent *ev) {
3666 XFocusChangeEvent *e = &ev->xfocus;
3667
3668 if(e->mode == NotifyGrab)
3669 return;
3670
3671 if(ev->type == FocusIn) {
3672 XSetICFocus(xw.xic);
3673 xw.state |= WIN_FOCUSED;
3674 xseturgency(0);
3675 if(IS_SET(MODE_FOCUS))
3676 ttywrite("\033[I", 3);
3677 } else {
3678 XUnsetICFocus(xw.xic);
3679 xw.state &= ~WIN_FOCUSED;
3680 if(IS_SET(MODE_FOCUS))
3681 ttywrite("\033[O", 3);
3682 }
3683 }
3684
3685 static inline bool
3686 match(uint mask, uint state) {
3687 return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
3688 }
3689
3690 void
3691 numlock(const Arg *dummy) {
3692 term.numlock ^= 1;
3693 }
3694
3695 char*
3696 kmap(KeySym k, uint state) {
3697 Key *kp;
3698 int i;
3699
3700 /* Check for mapped keys out of X11 function keys. */
3701 for(i = 0; i < LEN(mappedkeys); i++) {
3702 if(mappedkeys[i] == k)
3703 break;
3704 }
3705 if(i == LEN(mappedkeys)) {
3706 if((k & 0xFFFF) < 0xFD00)
3707 return NULL;
3708 }
3709
3710 for(kp = key; kp < key + LEN(key); kp++) {
3711 if(kp->k != k)
3712 continue;
3713
3714 if(!match(kp->mask, state))
3715 continue;
3716
3717 if(IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
3718 continue;
3719 if(term.numlock && kp->appkey == 2)
3720 continue;
3721
3722 if(IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
3723 continue;
3724
3725 if(IS_SET(MODE_CRLF) ? kp->crlf < 0 : kp->crlf > 0)
3726 continue;
3727
3728 return kp->s;
3729 }
3730
3731 return NULL;
3732 }
3733
3734 void
3735 kpress(XEvent *ev) {
3736 XKeyEvent *e = &ev->xkey;
3737 KeySym ksym;
3738 char buf[32], *customkey;
3739 int len;
3740 long c;
3741 Status status;
3742 Shortcut *bp;
3743
3744 if(IS_SET(MODE_KBDLOCK))
3745 return;
3746
3747 len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
3748 /* 1. shortcuts */
3749 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3750 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3751 bp->func(&(bp->arg));
3752 return;
3753 }
3754 }
3755
3756 /* 2. custom keys from config.h */
3757 if((customkey = kmap(ksym, e->state))) {
3758 ttysend(customkey, strlen(customkey));
3759 return;
3760 }
3761
3762 /* 3. composed string from input method */
3763 if(len == 0)
3764 return;
3765 if(len == 1 && e->state & Mod1Mask) {
3766 if(IS_SET(MODE_8BIT)) {
3767 if(*buf < 0177) {
3768 c = *buf | 0x80;
3769 len = utf8encode(c, buf, UTF_SIZ);
3770 }
3771 } else {
3772 buf[1] = buf[0];
3773 buf[0] = '\033';
3774 len = 2;
3775 }
3776 }
3777 ttysend(buf, len);
3778 }
3779
3780
3781 void
3782 cmessage(XEvent *e) {
3783 /*
3784 * See xembed specs
3785 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3786 */
3787 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3788 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3789 xw.state |= WIN_FOCUSED;
3790 xseturgency(0);
3791 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3792 xw.state &= ~WIN_FOCUSED;
3793 }
3794 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3795 /* Send SIGHUP to shell */
3796 kill(pid, SIGHUP);
3797 exit(EXIT_SUCCESS);
3798 }
3799 }
3800
3801 void
3802 cresize(int width, int height) {
3803 int col, row;
3804
3805 if(width != 0)
3806 xw.w = width;
3807 if(height != 0)
3808 xw.h = height;
3809
3810 col = (xw.w - 2 * borderpx) / xw.cw;
3811 row = (xw.h - 2 * borderpx) / xw.ch;
3812
3813 tresize(col, row);
3814 xresize(col, row);
3815 ttyresize();
3816 }
3817
3818 void
3819 resize(XEvent *e) {
3820 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3821 return;
3822
3823 cresize(e->xconfigure.width, e->xconfigure.height);
3824 }
3825
3826 void
3827 run(void) {
3828 XEvent ev;
3829 int w = xw.w, h = xw.h;
3830 fd_set rfd;
3831 int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3832 struct timespec drawtimeout, *tv = NULL, now, last, lastblink;
3833 long deltatime;
3834
3835 /* Waiting for window mapping */
3836 while(1) {
3837 XNextEvent(xw.dpy, &ev);
3838 if(XFilterEvent(&ev, None))
3839 continue;
3840 if(ev.type == ConfigureNotify) {
3841 w = ev.xconfigure.width;
3842 h = ev.xconfigure.height;
3843 } else if(ev.type == MapNotify) {
3844 break;
3845 }
3846 }
3847
3848 ttynew();
3849 cresize(w, h);
3850
3851 clock_gettime(CLOCK_MONOTONIC, &last);
3852 lastblink = last;
3853
3854 for(xev = actionfps;;) {
3855 FD_ZERO(&rfd);
3856 FD_SET(cmdfd, &rfd);
3857 FD_SET(xfd, &rfd);
3858
3859 if(pselect(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv, NULL) < 0) {
3860 if(errno == EINTR)
3861 continue;
3862 die("select failed: %s\n", strerror(errno));
3863 }
3864 if(FD_ISSET(cmdfd, &rfd)) {
3865 ttyread();
3866 if(blinktimeout) {
3867 blinkset = tattrset(ATTR_BLINK);
3868 if(!blinkset)
3869 MODBIT(term.mode, 0, MODE_BLINK);
3870 }
3871 }
3872
3873 if(FD_ISSET(xfd, &rfd))
3874 xev = actionfps;
3875
3876 clock_gettime(CLOCK_MONOTONIC, &now);
3877 drawtimeout.tv_sec = 0;
3878 drawtimeout.tv_nsec = (1000/xfps) * 1E6;
3879 tv = &drawtimeout;
3880
3881 dodraw = 0;
3882 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
3883 tsetdirtattr(ATTR_BLINK);
3884 term.mode ^= MODE_BLINK;
3885 lastblink = now;
3886 dodraw = 1;
3887 }
3888 deltatime = TIMEDIFF(now, last);
3889 if(deltatime > (xev? (1000/xfps) : (1000/actionfps))
3890 || deltatime < 0) {
3891 dodraw = 1;
3892 last = now;
3893 }
3894
3895 if(dodraw) {
3896 while(XPending(xw.dpy)) {
3897 XNextEvent(xw.dpy, &ev);
3898 if(XFilterEvent(&ev, None))
3899 continue;
3900 if(handler[ev.type])
3901 (handler[ev.type])(&ev);
3902 }
3903
3904 draw();
3905 XFlush(xw.dpy);
3906
3907 if(xev && !FD_ISSET(xfd, &rfd))
3908 xev--;
3909 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
3910 if(blinkset) {
3911 if(TIMEDIFF(now, lastblink) \
3912 > blinktimeout) {
3913 drawtimeout.tv_nsec = 1000;
3914 } else {
3915 drawtimeout.tv_nsec = (1E6 * \
3916 (blinktimeout - \
3917 TIMEDIFF(now,
3918 lastblink)));
3919 }
3920 } else {
3921 tv = NULL;
3922 }
3923 }
3924 }
3925 }
3926 }
3927
3928 void
3929 usage(void) {
3930 die("%s " VERSION " (c) 2010-2014 st engineers\n" \
3931 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]\n"
3932 " [-i] [-t title] [-w windowid] [-e command ...]\n", argv0);
3933 }
3934
3935 int
3936 main(int argc, char *argv[]) {
3937 char *titles;
3938 uint cols = 80, rows = 24;
3939
3940 xw.l = xw.t = 0;
3941 xw.isfixed = False;
3942
3943 ARGBEGIN {
3944 case 'a':
3945 allowaltscreen = false;
3946 break;
3947 case 'c':
3948 opt_class = EARGF(usage());
3949 break;
3950 case 'e':
3951 /* eat all remaining arguments */
3952 if(argc > 1) {
3953 opt_cmd = &argv[1];
3954 if(argv[1] != NULL && opt_title == NULL) {
3955 titles = xstrdup(argv[1]);
3956 opt_title = basename(titles);
3957 }
3958 }
3959 goto run;
3960 case 'f':
3961 opt_font = EARGF(usage());
3962 break;
3963 case 'g':
3964 xw.gm = XParseGeometry(EARGF(usage()),
3965 &xw.l, &xw.t, &cols, &rows);
3966 break;
3967 case 'i':
3968 xw.isfixed = True;
3969 break;
3970 case 'o':
3971 opt_io = EARGF(usage());
3972 break;
3973 case 't':
3974 opt_title = EARGF(usage());
3975 break;
3976 case 'w':
3977 opt_embed = EARGF(usage());
3978 break;
3979 case 'v':
3980 default:
3981 usage();
3982 } ARGEND;
3983
3984 run:
3985 setlocale(LC_CTYPE, "");
3986 XSetLocaleModifiers("");
3987 tnew(cols? cols : 1, rows? rows : 1);
3988 xinit();
3989 selinit();
3990 run();
3991
3992 return 0;
3993 }
3994