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Fix memmove() invocation with src/dst being NULL
[st.git] / st.c
1 /* See LICENSE for license details. */
2 #include <ctype.h>
3 #include <errno.h>
4 #include <fcntl.h>
5 #include <limits.h>
6 #include <locale.h>
7 #include <pwd.h>
8 #include <stdarg.h>
9 #include <stdbool.h>
10 #include <stdio.h>
11 #include <stdlib.h>
12 #include <string.h>
13 #include <signal.h>
14 #include <stdint.h>
15 #include <sys/ioctl.h>
16 #include <sys/select.h>
17 #include <sys/stat.h>
18 #include <sys/time.h>
19 #include <sys/types.h>
20 #include <sys/wait.h>
21 #include <time.h>
22 #include <unistd.h>
23 #include <libgen.h>
24 #include <X11/Xatom.h>
25 #include <X11/Xlib.h>
26 #include <X11/Xutil.h>
27 #include <X11/cursorfont.h>
28 #include <X11/keysym.h>
29 #include <X11/Xft/Xft.h>
30 #include <X11/XKBlib.h>
31 #include <fontconfig/fontconfig.h>
32 #include <wchar.h>
33
34 #include "arg.h"
35
36 char *argv0;
37
38 #define Glyph Glyph_
39 #define Font Font_
40
41 #if defined(__linux)
42 #include <pty.h>
43 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
44 #include <util.h>
45 #elif defined(__FreeBSD__) || defined(__DragonFly__)
46 #include <libutil.h>
47 #endif
48
49
50 /* XEMBED messages */
51 #define XEMBED_FOCUS_IN 4
52 #define XEMBED_FOCUS_OUT 5
53
54 /* Arbitrary sizes */
55 #define UTF_INVALID 0xFFFD
56 #define UTF_SIZ 4
57 #define ESC_BUF_SIZ (128*UTF_SIZ)
58 #define ESC_ARG_SIZ 16
59 #define STR_BUF_SIZ ESC_BUF_SIZ
60 #define STR_ARG_SIZ ESC_ARG_SIZ
61 #define DRAW_BUF_SIZ 20*1024
62 #define XK_ANY_MOD UINT_MAX
63 #define XK_NO_MOD 0
64 #define XK_SWITCH_MOD (1<<13)
65
66 /* macros */
67 #define MIN(a, b) ((a) < (b) ? (a) : (b))
68 #define MAX(a, b) ((a) < (b) ? (b) : (a))
69 #define LEN(a) (sizeof(a) / sizeof(a)[0])
70 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
71 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
72 #define ISCONTROLC0(c) (BETWEEN(c, 0, 0x1f) || (c) == '\177')
73 #define ISCONTROLC1(c) (BETWEEN(c, 0x80, 0x9f))
74 #define ISCONTROL(c) (ISCONTROLC0(c) || ISCONTROLC1(c))
75 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
76 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
77 #define IS_SET(flag) ((term.mode & (flag)) != 0)
78 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_nsec-t2.tv_nsec)/1E6)
79 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
80
81 #define TRUECOLOR(r,g,b) (1 << 24 | (r) << 16 | (g) << 8 | (b))
82 #define IS_TRUECOL(x) (1 << 24 & (x))
83 #define TRUERED(x) (((x) & 0xff0000) >> 8)
84 #define TRUEGREEN(x) (((x) & 0xff00))
85 #define TRUEBLUE(x) (((x) & 0xff) << 8)
86
87
88 enum glyph_attribute {
89 ATTR_NULL = 0,
90 ATTR_BOLD = 1 << 0,
91 ATTR_FAINT = 1 << 1,
92 ATTR_ITALIC = 1 << 2,
93 ATTR_UNDERLINE = 1 << 3,
94 ATTR_BLINK = 1 << 4,
95 ATTR_REVERSE = 1 << 5,
96 ATTR_INVISIBLE = 1 << 6,
97 ATTR_STRUCK = 1 << 7,
98 ATTR_WRAP = 1 << 8,
99 ATTR_WIDE = 1 << 9,
100 ATTR_WDUMMY = 1 << 10,
101 };
102
103 enum cursor_movement {
104 CURSOR_SAVE,
105 CURSOR_LOAD
106 };
107
108 enum cursor_state {
109 CURSOR_DEFAULT = 0,
110 CURSOR_WRAPNEXT = 1,
111 CURSOR_ORIGIN = 2
112 };
113
114 enum term_mode {
115 MODE_WRAP = 1 << 0,
116 MODE_INSERT = 1 << 1,
117 MODE_APPKEYPAD = 1 << 2,
118 MODE_ALTSCREEN = 1 << 3,
119 MODE_CRLF = 1 << 4,
120 MODE_MOUSEBTN = 1 << 5,
121 MODE_MOUSEMOTION = 1 << 6,
122 MODE_REVERSE = 1 << 7,
123 MODE_KBDLOCK = 1 << 8,
124 MODE_HIDE = 1 << 9,
125 MODE_ECHO = 1 << 10,
126 MODE_APPCURSOR = 1 << 11,
127 MODE_MOUSESGR = 1 << 12,
128 MODE_8BIT = 1 << 13,
129 MODE_BLINK = 1 << 14,
130 MODE_FBLINK = 1 << 15,
131 MODE_FOCUS = 1 << 16,
132 MODE_MOUSEX10 = 1 << 17,
133 MODE_MOUSEMANY = 1 << 18,
134 MODE_BRCKTPASTE = 1 << 19,
135 MODE_PRINT = 1 << 20,
136 MODE_MOUSE = MODE_MOUSEBTN|MODE_MOUSEMOTION|MODE_MOUSEX10\
137 |MODE_MOUSEMANY,
138 };
139
140 enum charset {
141 CS_GRAPHIC0,
142 CS_GRAPHIC1,
143 CS_UK,
144 CS_USA,
145 CS_MULTI,
146 CS_GER,
147 CS_FIN
148 };
149
150 enum escape_state {
151 ESC_START = 1,
152 ESC_CSI = 2,
153 ESC_STR = 4, /* DCS, OSC, PM, APC */
154 ESC_ALTCHARSET = 8,
155 ESC_STR_END = 16, /* a final string was encountered */
156 ESC_TEST = 32, /* Enter in test mode */
157 };
158
159 enum window_state {
160 WIN_VISIBLE = 1,
161 WIN_REDRAW = 2,
162 WIN_FOCUSED = 4
163 };
164
165 enum selection_type {
166 SEL_REGULAR = 1,
167 SEL_RECTANGULAR = 2
168 };
169
170 enum selection_snap {
171 SNAP_WORD = 1,
172 SNAP_LINE = 2
173 };
174
175 typedef unsigned char uchar;
176 typedef unsigned int uint;
177 typedef unsigned long ulong;
178 typedef unsigned short ushort;
179
180 typedef XftDraw *Draw;
181 typedef XftColor Color;
182
183 typedef struct {
184 char c[UTF_SIZ]; /* character code */
185 ushort mode; /* attribute flags */
186 uint32_t fg; /* foreground */
187 uint32_t bg; /* background */
188 } Glyph;
189
190 typedef Glyph *Line;
191
192 typedef struct {
193 Glyph attr; /* current char attributes */
194 int x;
195 int y;
196 char state;
197 } TCursor;
198
199 /* CSI Escape sequence structs */
200 /* ESC '[' [[ [<priv>] <arg> [;]] <mode> [<mode>]] */
201 typedef struct {
202 char buf[ESC_BUF_SIZ]; /* raw string */
203 int len; /* raw string length */
204 char priv;
205 int arg[ESC_ARG_SIZ];
206 int narg; /* nb of args */
207 char mode[2];
208 } CSIEscape;
209
210 /* STR Escape sequence structs */
211 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
212 typedef struct {
213 char type; /* ESC type ... */
214 char buf[STR_BUF_SIZ]; /* raw string */
215 int len; /* raw string length */
216 char *args[STR_ARG_SIZ];
217 int narg; /* nb of args */
218 } STREscape;
219
220 /* Internal representation of the screen */
221 typedef struct {
222 int row; /* nb row */
223 int col; /* nb col */
224 Line *line; /* screen */
225 Line *alt; /* alternate screen */
226 bool *dirty; /* dirtyness of lines */
227 TCursor c; /* cursor */
228 int top; /* top scroll limit */
229 int bot; /* bottom scroll limit */
230 int mode; /* terminal mode flags */
231 int esc; /* escape state flags */
232 char trantbl[4]; /* charset table translation */
233 int charset; /* current charset */
234 int icharset; /* selected charset for sequence */
235 bool numlock; /* lock numbers in keyboard */
236 bool *tabs;
237 } Term;
238
239 /* Purely graphic info */
240 typedef struct {
241 Display *dpy;
242 Colormap cmap;
243 Window win;
244 Drawable buf;
245 Atom xembed, wmdeletewin, netwmname, netwmpid;
246 XIM xim;
247 XIC xic;
248 Draw draw;
249 Visual *vis;
250 XSetWindowAttributes attrs;
251 int scr;
252 bool isfixed; /* is fixed geometry? */
253 int l, t; /* left and top offset */
254 int gm; /* geometry mask */
255 int tw, th; /* tty width and height */
256 int w, h; /* window width and height */
257 int ch; /* char height */
258 int cw; /* char width */
259 char state; /* focus, redraw, visible */
260 int cursor; /* cursor style */
261 } XWindow;
262
263 typedef struct {
264 uint b;
265 uint mask;
266 char *s;
267 } Mousekey;
268
269 typedef struct {
270 KeySym k;
271 uint mask;
272 char *s;
273 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
274 signed char appkey; /* application keypad */
275 signed char appcursor; /* application cursor */
276 signed char crlf; /* crlf mode */
277 } Key;
278
279 typedef struct {
280 int mode;
281 int type;
282 int snap;
283 /*
284 * Selection variables:
285 * nb – normalized coordinates of the beginning of the selection
286 * ne – normalized coordinates of the end of the selection
287 * ob – original coordinates of the beginning of the selection
288 * oe – original coordinates of the end of the selection
289 */
290 struct {
291 int x, y;
292 } nb, ne, ob, oe;
293
294 char *primary, *clipboard;
295 Atom xtarget;
296 bool alt;
297 struct timespec tclick1;
298 struct timespec tclick2;
299 } Selection;
300
301 typedef union {
302 int i;
303 uint ui;
304 float f;
305 const void *v;
306 } Arg;
307
308 typedef struct {
309 uint mod;
310 KeySym keysym;
311 void (*func)(const Arg *);
312 const Arg arg;
313 } Shortcut;
314
315 /* function definitions used in config.h */
316 static void clipcopy(const Arg *);
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(void);
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);
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);
410
411 static inline ushort sixd_to_16bit(int);
412 static void xdraws(char *, Glyph, int, int, int, int);
413 static void xhints(void);
414 static void xclear(int, int, int, int);
415 static void xdrawcursor(void);
416 static void xinit(void);
417 static void xloadcols(void);
418 static int xsetcolorname(int, const char *);
419 static int xgeommasktogravity(int);
420 static int xloadfont(Font *, FcPattern *);
421 static void xloadfonts(char *, double);
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 *, Time);
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(Time);
453 static void selscroll(int, int);
454 static void selsnap(int, int *, int *, int);
455 static int x2col(int);
456 static int y2row(int);
457 static void getbuttoninfo(XEvent *);
458 static void mousereport(XEvent *);
459
460 static size_t utf8decode(char *, long *, size_t);
461 static long utf8decodebyte(char, size_t *);
462 static size_t utf8encode(long, char *, size_t);
463 static char utf8encodebyte(long, size_t);
464 static size_t utf8len(char *);
465 static size_t utf8validate(long *, size_t);
466
467 static ssize_t xwrite(int, const char *, size_t);
468 static void *xmalloc(size_t);
469 static void *xrealloc(void *, size_t);
470 static char *xstrdup(char *);
471
472 static void usage(void);
473
474 static void (*handler[LASTEvent])(XEvent *) = {
475 [KeyPress] = kpress,
476 [ClientMessage] = cmessage,
477 [ConfigureNotify] = resize,
478 [VisibilityNotify] = visibility,
479 [UnmapNotify] = unmap,
480 [Expose] = expose,
481 [FocusIn] = focus,
482 [FocusOut] = focus,
483 [MotionNotify] = bmotion,
484 [ButtonPress] = bpress,
485 [ButtonRelease] = brelease,
486 /*
487 * Uncomment if you want the selection to disappear when you select something
488 * different in another window.
489 */
490 /* [SelectionClear] = selclear, */
491 [SelectionNotify] = selnotify,
492 [SelectionRequest] = selrequest,
493 };
494
495 /* Globals */
496 static DC dc;
497 static XWindow xw;
498 static Term term;
499 static CSIEscape csiescseq;
500 static STREscape strescseq;
501 static int cmdfd;
502 static pid_t pid;
503 static Selection sel;
504 static int iofd = STDOUT_FILENO;
505 static char **opt_cmd = NULL;
506 static char *opt_io = NULL;
507 static char *opt_title = NULL;
508 static char *opt_embed = NULL;
509 static char *opt_class = NULL;
510 static char *opt_font = NULL;
511 static int oldbutton = 3; /* button event on startup: 3 = release */
512
513 static char *usedfont = NULL;
514 static double usedfontsize = 0;
515 static double defaultfontsize = 0;
516
517 static uchar utfbyte[UTF_SIZ + 1] = {0x80, 0, 0xC0, 0xE0, 0xF0};
518 static uchar utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
519 static long utfmin[UTF_SIZ + 1] = { 0, 0, 0x80, 0x800, 0x10000};
520 static long utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
521
522 /* Font Ring Cache */
523 enum {
524 FRC_NORMAL,
525 FRC_ITALIC,
526 FRC_BOLD,
527 FRC_ITALICBOLD
528 };
529
530 typedef struct {
531 XftFont *font;
532 int flags;
533 long unicodep;
534 } Fontcache;
535
536 /* Fontcache is an array now. A new font will be appended to the array. */
537 static Fontcache frc[16];
538 static int frclen = 0;
539
540 ssize_t
541 xwrite(int fd, const char *s, size_t len) {
542 size_t aux = len;
543
544 while(len > 0) {
545 ssize_t r = write(fd, s, len);
546 if(r < 0)
547 return r;
548 len -= r;
549 s += r;
550 }
551 return aux;
552 }
553
554 void *
555 xmalloc(size_t len) {
556 void *p = malloc(len);
557
558 if(!p)
559 die("Out of memory\n");
560
561 return p;
562 }
563
564 void *
565 xrealloc(void *p, size_t len) {
566 if((p = realloc(p, len)) == NULL)
567 die("Out of memory\n");
568
569 return p;
570 }
571
572 char *
573 xstrdup(char *s) {
574 if((s = strdup(s)) == NULL)
575 die("Out of memory\n");
576
577 return s;
578 }
579
580 size_t
581 utf8decode(char *c, long *u, size_t clen) {
582 size_t i, j, len, type;
583 long udecoded;
584
585 *u = UTF_INVALID;
586 if(!clen)
587 return 0;
588 udecoded = utf8decodebyte(c[0], &len);
589 if(!BETWEEN(len, 1, UTF_SIZ))
590 return 1;
591 for(i = 1, j = 1; i < clen && j < len; ++i, ++j) {
592 udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
593 if(type != 0)
594 return j;
595 }
596 if(j < len)
597 return 0;
598 *u = udecoded;
599 utf8validate(u, len);
600 return len;
601 }
602
603 long
604 utf8decodebyte(char c, size_t *i) {
605 for(*i = 0; *i < LEN(utfmask); ++(*i))
606 if(((uchar)c & utfmask[*i]) == utfbyte[*i])
607 return (uchar)c & ~utfmask[*i];
608 return 0;
609 }
610
611 size_t
612 utf8encode(long u, char *c, size_t clen) {
613 size_t len, i;
614
615 len = utf8validate(&u, 0);
616 if(clen < len)
617 return 0;
618 for(i = len - 1; i != 0; --i) {
619 c[i] = utf8encodebyte(u, 0);
620 u >>= 6;
621 }
622 c[0] = utf8encodebyte(u, len);
623 return len;
624 }
625
626 char
627 utf8encodebyte(long u, size_t i) {
628 return utfbyte[i] | (u & ~utfmask[i]);
629 }
630
631 size_t
632 utf8len(char *c) {
633 return utf8decode(c, &(long){0}, UTF_SIZ);
634 }
635
636 size_t
637 utf8validate(long *u, size_t i) {
638 if(!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF))
639 *u = UTF_INVALID;
640 for(i = 1; *u > utfmax[i]; ++i)
641 ;
642 return i;
643 }
644
645 void
646 selinit(void) {
647 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
648 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
649 sel.mode = 0;
650 sel.ob.x = -1;
651 sel.primary = NULL;
652 sel.clipboard = NULL;
653 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
654 if(sel.xtarget == None)
655 sel.xtarget = XA_STRING;
656 }
657
658 int
659 x2col(int x) {
660 x -= borderpx;
661 x /= xw.cw;
662
663 return LIMIT(x, 0, term.col-1);
664 }
665
666 int
667 y2row(int y) {
668 y -= borderpx;
669 y /= xw.ch;
670
671 return LIMIT(y, 0, term.row-1);
672 }
673
674 int tlinelen(int y) {
675 int i = term.col;
676
677 if(term.line[y][i - 1].mode & ATTR_WRAP)
678 return i;
679
680 while(i > 0 && term.line[y][i - 1].c[0] == ' ')
681 --i;
682
683 return i;
684 }
685
686 void
687 selnormalize(void) {
688 int i;
689
690 if(sel.ob.y == sel.oe.y || sel.type == SEL_RECTANGULAR) {
691 sel.nb.x = MIN(sel.ob.x, sel.oe.x);
692 sel.ne.x = MAX(sel.ob.x, sel.oe.x);
693 } else {
694 sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
695 sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
696 }
697 sel.nb.y = MIN(sel.ob.y, sel.oe.y);
698 sel.ne.y = MAX(sel.ob.y, sel.oe.y);
699
700 selsnap(sel.snap, &sel.nb.x, &sel.nb.y, -1);
701 selsnap(sel.snap, &sel.ne.x, &sel.ne.y, +1);
702
703 /* expand selection over line breaks */
704 if (sel.type == SEL_RECTANGULAR)
705 return;
706 i = tlinelen(sel.nb.y);
707 if (i < sel.nb.x)
708 sel.nb.x = i;
709 if (tlinelen(sel.ne.y) <= sel.ne.x)
710 sel.ne.x = term.col - 1;
711 }
712
713 bool
714 selected(int x, int y) {
715 if(sel.type == SEL_RECTANGULAR)
716 return BETWEEN(y, sel.nb.y, sel.ne.y)
717 && BETWEEN(x, sel.nb.x, sel.ne.x);
718
719 return BETWEEN(y, sel.nb.y, sel.ne.y)
720 && (y != sel.nb.y || x >= sel.nb.x)
721 && (y != sel.ne.y || x <= sel.ne.x);
722 }
723
724 void
725 selsnap(int mode, int *x, int *y, int direction) {
726 int newx, newy, xt, yt;
727 bool delim, prevdelim;
728 Glyph *gp, *prevgp;
729
730 switch(mode) {
731 case SNAP_WORD:
732 /*
733 * Snap around if the word wraps around at the end or
734 * beginning of a line.
735 */
736 prevgp = &term.line[*y][*x];
737 prevdelim = strchr(worddelimiters, prevgp->c[0]) != NULL;
738 for(;;) {
739 newx = *x + direction;
740 newy = *y;
741 if(!BETWEEN(newx, 0, term.col - 1)) {
742 newy += direction;
743 newx = (newx + term.col) % term.col;
744 if (!BETWEEN(newy, 0, term.row - 1))
745 break;
746
747 if(direction > 0)
748 yt = *y, xt = *x;
749 else
750 yt = newy, xt = newx;
751 if(!(term.line[yt][xt].mode & ATTR_WRAP))
752 break;
753 }
754
755 if (newx >= tlinelen(newy))
756 break;
757
758 gp = &term.line[newy][newx];
759 delim = strchr(worddelimiters, gp->c[0]) != NULL;
760 if(!(gp->mode & ATTR_WDUMMY) && (delim != prevdelim
761 || (delim && gp->c[0] != prevgp->c[0])))
762 break;
763
764 *x = newx;
765 *y = newy;
766 prevgp = gp;
767 prevdelim = delim;
768 }
769 break;
770 case SNAP_LINE:
771 /*
772 * Snap around if the the previous line or the current one
773 * has set ATTR_WRAP at its end. Then the whole next or
774 * previous line will be selected.
775 */
776 *x = (direction < 0) ? 0 : term.col - 1;
777 if(direction < 0 && *y > 0) {
778 for(; *y > 0; *y += direction) {
779 if(!(term.line[*y-1][term.col-1].mode
780 & ATTR_WRAP)) {
781 break;
782 }
783 }
784 } else if(direction > 0 && *y < term.row-1) {
785 for(; *y < term.row; *y += direction) {
786 if(!(term.line[*y][term.col-1].mode
787 & ATTR_WRAP)) {
788 break;
789 }
790 }
791 }
792 break;
793 }
794 }
795
796 void
797 getbuttoninfo(XEvent *e) {
798 int type;
799 uint state = e->xbutton.state & ~(Button1Mask | forceselmod);
800
801 sel.alt = IS_SET(MODE_ALTSCREEN);
802
803 sel.oe.x = x2col(e->xbutton.x);
804 sel.oe.y = y2row(e->xbutton.y);
805 selnormalize();
806
807 sel.type = SEL_REGULAR;
808 for(type = 1; type < LEN(selmasks); ++type) {
809 if(match(selmasks[type], state)) {
810 sel.type = type;
811 break;
812 }
813 }
814 }
815
816 void
817 mousereport(XEvent *e) {
818 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
819 button = e->xbutton.button, state = e->xbutton.state,
820 len;
821 char buf[40];
822 static int ox, oy;
823
824 /* from urxvt */
825 if(e->xbutton.type == MotionNotify) {
826 if(x == ox && y == oy)
827 return;
828 if(!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
829 return;
830 /* MOUSE_MOTION: no reporting if no button is pressed */
831 if(IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
832 return;
833
834 button = oldbutton + 32;
835 ox = x;
836 oy = y;
837 } else {
838 if(!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
839 button = 3;
840 } else {
841 button -= Button1;
842 if(button >= 3)
843 button += 64 - 3;
844 }
845 if(e->xbutton.type == ButtonPress) {
846 oldbutton = button;
847 ox = x;
848 oy = y;
849 } else if(e->xbutton.type == ButtonRelease) {
850 oldbutton = 3;
851 /* MODE_MOUSEX10: no button release reporting */
852 if(IS_SET(MODE_MOUSEX10))
853 return;
854 if (button == 64 || button == 65)
855 return;
856 }
857 }
858
859 if(!IS_SET(MODE_MOUSEX10)) {
860 button += (state & ShiftMask ? 4 : 0)
861 + (state & Mod4Mask ? 8 : 0)
862 + (state & ControlMask ? 16 : 0);
863 }
864
865 len = 0;
866 if(IS_SET(MODE_MOUSESGR)) {
867 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
868 button, x+1, y+1,
869 e->xbutton.type == ButtonRelease ? 'm' : 'M');
870 } else if(x < 223 && y < 223) {
871 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
872 32+button, 32+x+1, 32+y+1);
873 } else {
874 return;
875 }
876
877 ttywrite(buf, len);
878 }
879
880 void
881 bpress(XEvent *e) {
882 struct timespec now;
883 Mousekey *mk;
884
885 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
886 mousereport(e);
887 return;
888 }
889
890 for(mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
891 if(e->xbutton.button == mk->b
892 && match(mk->mask, e->xbutton.state)) {
893 ttysend(mk->s, strlen(mk->s));
894 return;
895 }
896 }
897
898 if(e->xbutton.button == Button1) {
899 clock_gettime(CLOCK_MONOTONIC, &now);
900
901 /* Clear previous selection, logically and visually. */
902 selclear(NULL);
903 sel.mode = 1;
904 sel.type = SEL_REGULAR;
905 sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
906 sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
907
908 /*
909 * If the user clicks below predefined timeouts specific
910 * snapping behaviour is exposed.
911 */
912 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
913 sel.snap = SNAP_LINE;
914 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
915 sel.snap = SNAP_WORD;
916 } else {
917 sel.snap = 0;
918 }
919 selnormalize();
920
921 /*
922 * Draw selection, unless it's regular and we don't want to
923 * make clicks visible
924 */
925 if(sel.snap != 0) {
926 sel.mode++;
927 tsetdirt(sel.nb.y, sel.ne.y);
928 }
929 sel.tclick2 = sel.tclick1;
930 sel.tclick1 = now;
931 }
932 }
933
934 char *
935 getsel(void) {
936 char *str, *ptr;
937 int y, bufsize, size, lastx, linelen;
938 Glyph *gp, *last;
939
940 if(sel.ob.x == -1)
941 return NULL;
942
943 bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
944 ptr = str = xmalloc(bufsize);
945
946 /* append every set & selected glyph to the selection */
947 for(y = sel.nb.y; y <= sel.ne.y; y++) {
948 linelen = tlinelen(y);
949
950 if(sel.type == SEL_RECTANGULAR) {
951 gp = &term.line[y][sel.nb.x];
952 lastx = sel.ne.x;
953 } else {
954 gp = &term.line[y][sel.nb.y == y ? sel.nb.x : 0];
955 lastx = (sel.ne.y == y) ? sel.ne.x : term.col-1;
956 }
957 last = &term.line[y][MIN(lastx, linelen-1)];
958 while(last >= gp && last->c[0] == ' ')
959 --last;
960
961 for( ; gp <= last; ++gp) {
962 if(gp->mode & ATTR_WDUMMY)
963 continue;
964
965 size = utf8len(gp->c);
966 memcpy(ptr, gp->c, size);
967 ptr += size;
968 }
969
970 /*
971 * Copy and pasting of line endings is inconsistent
972 * in the inconsistent terminal and GUI world.
973 * The best solution seems like to produce '\n' when
974 * something is copied from st and convert '\n' to
975 * '\r', when something to be pasted is received by
976 * st.
977 * FIXME: Fix the computer world.
978 */
979 if((y < sel.ne.y || lastx >= linelen) && !(last->mode & ATTR_WRAP))
980 *ptr++ = '\n';
981 }
982 *ptr = 0;
983 return str;
984 }
985
986 void
987 selcopy(Time t) {
988 xsetsel(getsel(), t);
989 }
990
991 void
992 selnotify(XEvent *e) {
993 ulong nitems, ofs, rem;
994 int format;
995 uchar *data, *last, *repl;
996 Atom type;
997 XSelectionEvent *xsev;
998
999 ofs = 0;
1000 xsev = &e->xselection;
1001 if (xsev->property == None)
1002 return;
1003 do {
1004 if(XGetWindowProperty(xw.dpy, xw.win, xsev->property, ofs,
1005 BUFSIZ/4, False, AnyPropertyType,
1006 &type, &format, &nitems, &rem,
1007 &data)) {
1008 fprintf(stderr, "Clipboard allocation failed\n");
1009 return;
1010 }
1011
1012 /*
1013 * As seen in getsel:
1014 * Line endings are inconsistent in the terminal and GUI world
1015 * copy and pasting. When receiving some selection data,
1016 * replace all '\n' with '\r'.
1017 * FIXME: Fix the computer world.
1018 */
1019 repl = data;
1020 last = data + nitems * format / 8;
1021 while((repl = memchr(repl, '\n', last - repl))) {
1022 *repl++ = '\r';
1023 }
1024
1025 if(IS_SET(MODE_BRCKTPASTE))
1026 ttywrite("\033[200~", 6);
1027 ttysend((char *)data, nitems * format / 8);
1028 if(IS_SET(MODE_BRCKTPASTE))
1029 ttywrite("\033[201~", 6);
1030 XFree(data);
1031 /* number of 32-bit chunks returned */
1032 ofs += nitems * format / 32;
1033 } while(rem > 0);
1034 }
1035
1036 void
1037 selpaste(const Arg *dummy) {
1038 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
1039 xw.win, CurrentTime);
1040 }
1041
1042 void
1043 clipcopy(const Arg *dummy) {
1044 Atom clipboard;
1045
1046 if(sel.clipboard != NULL)
1047 free(sel.clipboard);
1048
1049 if(sel.primary != NULL) {
1050 sel.clipboard = xstrdup(sel.primary);
1051 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1052 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
1053 }
1054 }
1055
1056 void
1057 clippaste(const Arg *dummy) {
1058 Atom clipboard;
1059
1060 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1061 XConvertSelection(xw.dpy, clipboard, sel.xtarget, clipboard,
1062 xw.win, CurrentTime);
1063 }
1064
1065 void
1066 selclear(XEvent *e) {
1067 if(sel.ob.x == -1)
1068 return;
1069 sel.ob.x = -1;
1070 tsetdirt(sel.nb.y, sel.ne.y);
1071 }
1072
1073 void
1074 selrequest(XEvent *e) {
1075 XSelectionRequestEvent *xsre;
1076 XSelectionEvent xev;
1077 Atom xa_targets, string, clipboard;
1078 char *seltext;
1079
1080 xsre = (XSelectionRequestEvent *) e;
1081 xev.type = SelectionNotify;
1082 xev.requestor = xsre->requestor;
1083 xev.selection = xsre->selection;
1084 xev.target = xsre->target;
1085 xev.time = xsre->time;
1086 if (xsre->property == None)
1087 xsre->property = xsre->target;
1088
1089 /* reject */
1090 xev.property = None;
1091
1092 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
1093 if(xsre->target == xa_targets) {
1094 /* respond with the supported type */
1095 string = sel.xtarget;
1096 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1097 XA_ATOM, 32, PropModeReplace,
1098 (uchar *) &string, 1);
1099 xev.property = xsre->property;
1100 } else if(xsre->target == sel.xtarget || xsre->target == XA_STRING) {
1101 /*
1102 * xith XA_STRING non ascii characters may be incorrect in the
1103 * requestor. It is not our problem, use utf8.
1104 */
1105 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1106 if(xsre->selection == XA_PRIMARY) {
1107 seltext = sel.primary;
1108 } else if(xsre->selection == clipboard) {
1109 seltext = sel.clipboard;
1110 } else {
1111 fprintf(stderr,
1112 "Unhandled clipboard selection 0x%lx\n",
1113 xsre->selection);
1114 return;
1115 }
1116 if(seltext != NULL) {
1117 XChangeProperty(xsre->display, xsre->requestor,
1118 xsre->property, xsre->target,
1119 8, PropModeReplace,
1120 (uchar *)seltext, strlen(seltext));
1121 xev.property = xsre->property;
1122 }
1123 }
1124
1125 /* all done, send a notification to the listener */
1126 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
1127 fprintf(stderr, "Error sending SelectionNotify event\n");
1128 }
1129
1130 void
1131 xsetsel(char *str, Time t) {
1132 free(sel.primary);
1133 sel.primary = str;
1134
1135 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, t);
1136 if (XGetSelectionOwner(xw.dpy, XA_PRIMARY) != xw.win)
1137 selclear(0);
1138 }
1139
1140 void
1141 brelease(XEvent *e) {
1142 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1143 mousereport(e);
1144 return;
1145 }
1146
1147 if(e->xbutton.button == Button2) {
1148 selpaste(NULL);
1149 } else if(e->xbutton.button == Button1) {
1150 if(sel.mode < 2) {
1151 selclear(NULL);
1152 } else {
1153 getbuttoninfo(e);
1154 selcopy(e->xbutton.time);
1155 }
1156 sel.mode = 0;
1157 tsetdirt(sel.nb.y, sel.ne.y);
1158 }
1159 }
1160
1161 void
1162 bmotion(XEvent *e) {
1163 int oldey, oldex, oldsby, oldsey;
1164
1165 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1166 mousereport(e);
1167 return;
1168 }
1169
1170 if(!sel.mode)
1171 return;
1172
1173 sel.mode++;
1174 oldey = sel.oe.y;
1175 oldex = sel.oe.x;
1176 oldsby = sel.nb.y;
1177 oldsey = sel.ne.y;
1178 getbuttoninfo(e);
1179
1180 if(oldey != sel.oe.y || oldex != sel.oe.x)
1181 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
1182 }
1183
1184 void
1185 die(const char *errstr, ...) {
1186 va_list ap;
1187
1188 va_start(ap, errstr);
1189 vfprintf(stderr, errstr, ap);
1190 va_end(ap);
1191 exit(EXIT_FAILURE);
1192 }
1193
1194 void
1195 execsh(void) {
1196 char **args, *sh, *prog;
1197 const struct passwd *pw;
1198 char buf[sizeof(long) * 8 + 1];
1199
1200 errno = 0;
1201 if((pw = getpwuid(getuid())) == NULL) {
1202 if(errno)
1203 die("getpwuid:%s\n", strerror(errno));
1204 else
1205 die("who are you?\n");
1206 }
1207
1208 if (!(sh = getenv("SHELL"))) {
1209 sh = (pw->pw_shell[0]) ? pw->pw_shell : shell;
1210 }
1211
1212 if(opt_cmd)
1213 prog = opt_cmd[0];
1214 else if(utmp)
1215 prog = utmp;
1216 else
1217 prog = sh;
1218 args = (opt_cmd) ? opt_cmd : (char *[]) {prog, NULL};
1219
1220 snprintf(buf, sizeof(buf), "%lu", xw.win);
1221
1222 unsetenv("COLUMNS");
1223 unsetenv("LINES");
1224 unsetenv("TERMCAP");
1225 setenv("LOGNAME", pw->pw_name, 1);
1226 setenv("USER", pw->pw_name, 1);
1227 setenv("SHELL", sh, 1);
1228 setenv("HOME", pw->pw_dir, 1);
1229 setenv("TERM", termname, 1);
1230 setenv("WINDOWID", buf, 1);
1231
1232 signal(SIGCHLD, SIG_DFL);
1233 signal(SIGHUP, SIG_DFL);
1234 signal(SIGINT, SIG_DFL);
1235 signal(SIGQUIT, SIG_DFL);
1236 signal(SIGTERM, SIG_DFL);
1237 signal(SIGALRM, SIG_DFL);
1238
1239 execvp(prog, args);
1240 _exit(EXIT_FAILURE);
1241 }
1242
1243 void
1244 sigchld(int a) {
1245 int stat, ret;
1246
1247 if(waitpid(pid, &stat, 0) < 0)
1248 die("Waiting for pid %hd failed: %s\n", pid, strerror(errno));
1249
1250 ret = WIFEXITED(stat) ? WEXITSTATUS(stat) : EXIT_FAILURE;
1251 if (ret != EXIT_SUCCESS)
1252 die("child finished with error '%d'\n", stat);
1253 exit(EXIT_SUCCESS);
1254 }
1255
1256 void
1257 ttynew(void) {
1258 int m, s;
1259 struct winsize w = {term.row, term.col, 0, 0};
1260
1261 /* seems to work fine on linux, openbsd and freebsd */
1262 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1263 die("openpty failed: %s\n", strerror(errno));
1264
1265 switch(pid = fork()) {
1266 case -1:
1267 die("fork failed\n");
1268 break;
1269 case 0:
1270 setsid(); /* create a new process group */
1271 dup2(s, STDIN_FILENO);
1272 dup2(s, STDOUT_FILENO);
1273 dup2(s, STDERR_FILENO);
1274 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1275 die("ioctl TIOCSCTTY failed: %s\n", strerror(errno));
1276 close(s);
1277 close(m);
1278 execsh();
1279 break;
1280 default:
1281 close(s);
1282 cmdfd = m;
1283 signal(SIGCHLD, sigchld);
1284 if(opt_io) {
1285 term.mode |= MODE_PRINT;
1286 iofd = (!strcmp(opt_io, "-")) ?
1287 STDOUT_FILENO :
1288 open(opt_io, O_WRONLY | O_CREAT, 0666);
1289 if(iofd < 0) {
1290 fprintf(stderr, "Error opening %s:%s\n",
1291 opt_io, strerror(errno));
1292 }
1293 }
1294 break;
1295 }
1296 }
1297
1298 void
1299 ttyread(void) {
1300 static char buf[BUFSIZ];
1301 static int buflen = 0;
1302 char *ptr;
1303 char s[UTF_SIZ];
1304 int charsize; /* size of utf8 char in bytes */
1305 long unicodep;
1306 int ret;
1307
1308 /* append read bytes to unprocessed bytes */
1309 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1310 die("Couldn't read from shell: %s\n", strerror(errno));
1311
1312 /* process every complete utf8 char */
1313 buflen += ret;
1314 ptr = buf;
1315 while((charsize = utf8decode(ptr, &unicodep, buflen))) {
1316 utf8encode(unicodep, s, UTF_SIZ);
1317 tputc(s, charsize);
1318 ptr += charsize;
1319 buflen -= charsize;
1320 }
1321
1322 /* keep any uncomplete utf8 char for the next call */
1323 memmove(buf, ptr, buflen);
1324 }
1325
1326 void
1327 ttywrite(const char *s, size_t n) {
1328 if(xwrite(cmdfd, s, n) == -1)
1329 die("write error on tty: %s\n", strerror(errno));
1330 }
1331
1332 void
1333 ttysend(char *s, size_t n) {
1334 ttywrite(s, n);
1335 if(IS_SET(MODE_ECHO))
1336 techo(s, n);
1337 }
1338
1339 void
1340 ttyresize(void) {
1341 struct winsize w;
1342
1343 w.ws_row = term.row;
1344 w.ws_col = term.col;
1345 w.ws_xpixel = xw.tw;
1346 w.ws_ypixel = xw.th;
1347 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1348 fprintf(stderr, "Couldn't set window size: %s\n", strerror(errno));
1349 }
1350
1351 int
1352 tattrset(int attr) {
1353 int i, j;
1354
1355 for(i = 0; i < term.row-1; i++) {
1356 for(j = 0; j < term.col-1; j++) {
1357 if(term.line[i][j].mode & attr)
1358 return 1;
1359 }
1360 }
1361
1362 return 0;
1363 }
1364
1365 void
1366 tsetdirt(int top, int bot) {
1367 int i;
1368
1369 LIMIT(top, 0, term.row-1);
1370 LIMIT(bot, 0, term.row-1);
1371
1372 for(i = top; i <= bot; i++)
1373 term.dirty[i] = 1;
1374 }
1375
1376 void
1377 tsetdirtattr(int attr) {
1378 int i, j;
1379
1380 for(i = 0; i < term.row-1; i++) {
1381 for(j = 0; j < term.col-1; j++) {
1382 if(term.line[i][j].mode & attr) {
1383 tsetdirt(i, i);
1384 break;
1385 }
1386 }
1387 }
1388 }
1389
1390 void
1391 tfulldirt(void) {
1392 tsetdirt(0, term.row-1);
1393 }
1394
1395 void
1396 tcursor(int mode) {
1397 static TCursor c[2];
1398 bool alt = IS_SET(MODE_ALTSCREEN);
1399
1400 if(mode == CURSOR_SAVE) {
1401 c[alt] = term.c;
1402 } else if(mode == CURSOR_LOAD) {
1403 term.c = c[alt];
1404 tmoveto(c[alt].x, c[alt].y);
1405 }
1406 }
1407
1408 void
1409 treset(void) {
1410 uint i;
1411
1412 term.c = (TCursor){{
1413 .mode = ATTR_NULL,
1414 .fg = defaultfg,
1415 .bg = defaultbg
1416 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1417
1418 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1419 for(i = tabspaces; i < term.col; i += tabspaces)
1420 term.tabs[i] = 1;
1421 term.top = 0;
1422 term.bot = term.row - 1;
1423 term.mode = MODE_WRAP;
1424 memset(term.trantbl, sizeof(term.trantbl), CS_USA);
1425 term.charset = 0;
1426
1427 for(i = 0; i < 2; i++) {
1428 tmoveto(0, 0);
1429 tcursor(CURSOR_SAVE);
1430 tclearregion(0, 0, term.col-1, term.row-1);
1431 tswapscreen();
1432 }
1433 }
1434
1435 void
1436 tnew(int col, int row) {
1437 term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } };
1438 tresize(col, row);
1439 term.numlock = 1;
1440
1441 treset();
1442 }
1443
1444 void
1445 tswapscreen(void) {
1446 Line *tmp = term.line;
1447
1448 term.line = term.alt;
1449 term.alt = tmp;
1450 term.mode ^= MODE_ALTSCREEN;
1451 tfulldirt();
1452 }
1453
1454 void
1455 tscrolldown(int orig, int n) {
1456 int i;
1457 Line temp;
1458
1459 LIMIT(n, 0, term.bot-orig+1);
1460
1461 tsetdirt(orig, term.bot-n);
1462 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1463
1464 for(i = term.bot; i >= orig+n; i--) {
1465 temp = term.line[i];
1466 term.line[i] = term.line[i-n];
1467 term.line[i-n] = temp;
1468 }
1469
1470 selscroll(orig, n);
1471 }
1472
1473 void
1474 tscrollup(int orig, int n) {
1475 int i;
1476 Line temp;
1477
1478 LIMIT(n, 0, term.bot-orig+1);
1479
1480 tclearregion(0, orig, term.col-1, orig+n-1);
1481 tsetdirt(orig+n, term.bot);
1482
1483 for(i = orig; i <= term.bot-n; i++) {
1484 temp = term.line[i];
1485 term.line[i] = term.line[i+n];
1486 term.line[i+n] = temp;
1487 }
1488
1489 selscroll(orig, -n);
1490 }
1491
1492 void
1493 selscroll(int orig, int n) {
1494 if(sel.ob.x == -1)
1495 return;
1496
1497 if(BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
1498 if((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
1499 selclear(NULL);
1500 return;
1501 }
1502 if(sel.type == SEL_RECTANGULAR) {
1503 if(sel.ob.y < term.top)
1504 sel.ob.y = term.top;
1505 if(sel.oe.y > term.bot)
1506 sel.oe.y = term.bot;
1507 } else {
1508 if(sel.ob.y < term.top) {
1509 sel.ob.y = term.top;
1510 sel.ob.x = 0;
1511 }
1512 if(sel.oe.y > term.bot) {
1513 sel.oe.y = term.bot;
1514 sel.oe.x = term.col;
1515 }
1516 }
1517 selnormalize();
1518 }
1519 }
1520
1521 void
1522 tnewline(int first_col) {
1523 int y = term.c.y;
1524
1525 if(y == term.bot) {
1526 tscrollup(term.top, 1);
1527 } else {
1528 y++;
1529 }
1530 tmoveto(first_col ? 0 : term.c.x, y);
1531 }
1532
1533 void
1534 csiparse(void) {
1535 char *p = csiescseq.buf, *np;
1536 long int v;
1537
1538 csiescseq.narg = 0;
1539 if(*p == '?') {
1540 csiescseq.priv = 1;
1541 p++;
1542 }
1543
1544 csiescseq.buf[csiescseq.len] = '\0';
1545 while(p < csiescseq.buf+csiescseq.len) {
1546 np = NULL;
1547 v = strtol(p, &np, 10);
1548 if(np == p)
1549 v = 0;
1550 if(v == LONG_MAX || v == LONG_MIN)
1551 v = -1;
1552 csiescseq.arg[csiescseq.narg++] = v;
1553 p = np;
1554 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1555 break;
1556 p++;
1557 }
1558 csiescseq.mode[0] = *p++;
1559 csiescseq.mode[1] = (p < csiescseq.buf+csiescseq.len) ? *p : '\0';
1560 }
1561
1562 /* for absolute user moves, when decom is set */
1563 void
1564 tmoveato(int x, int y) {
1565 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1566 }
1567
1568 void
1569 tmoveto(int x, int y) {
1570 int miny, maxy;
1571
1572 if(term.c.state & CURSOR_ORIGIN) {
1573 miny = term.top;
1574 maxy = term.bot;
1575 } else {
1576 miny = 0;
1577 maxy = term.row - 1;
1578 }
1579 term.c.state &= ~CURSOR_WRAPNEXT;
1580 term.c.x = LIMIT(x, 0, term.col-1);
1581 term.c.y = LIMIT(y, miny, maxy);
1582 }
1583
1584 void
1585 tsetchar(char *c, Glyph *attr, int x, int y) {
1586 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1587 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1588 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1589 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1590 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1591 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1592 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1593 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1594 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1595 };
1596
1597 /*
1598 * The table is proudly stolen from rxvt.
1599 */
1600 if(term.trantbl[term.charset] == CS_GRAPHIC0) {
1601 if(BETWEEN(c[0], 0x41, 0x7e) && vt100_0[c[0] - 0x41]) {
1602 c = vt100_0[c[0] - 0x41];
1603 }
1604 }
1605
1606 if(term.line[y][x].mode & ATTR_WIDE) {
1607 if(x+1 < term.col) {
1608 term.line[y][x+1].c[0] = ' ';
1609 term.line[y][x+1].mode &= ~ATTR_WDUMMY;
1610 }
1611 } else if(term.line[y][x].mode & ATTR_WDUMMY) {
1612 term.line[y][x-1].c[0] = ' ';
1613 term.line[y][x-1].mode &= ~ATTR_WIDE;
1614 }
1615
1616 term.dirty[y] = 1;
1617 term.line[y][x] = *attr;
1618 memcpy(term.line[y][x].c, c, UTF_SIZ);
1619 }
1620
1621 void
1622 tclearregion(int x1, int y1, int x2, int y2) {
1623 int x, y, temp;
1624 Glyph *gp;
1625
1626 if(x1 > x2)
1627 temp = x1, x1 = x2, x2 = temp;
1628 if(y1 > y2)
1629 temp = y1, y1 = y2, y2 = temp;
1630
1631 LIMIT(x1, 0, term.col-1);
1632 LIMIT(x2, 0, term.col-1);
1633 LIMIT(y1, 0, term.row-1);
1634 LIMIT(y2, 0, term.row-1);
1635
1636 for(y = y1; y <= y2; y++) {
1637 term.dirty[y] = 1;
1638 for(x = x1; x <= x2; x++) {
1639 gp = &term.line[y][x];
1640 if(selected(x, y))
1641 selclear(NULL);
1642 gp->fg = term.c.attr.fg;
1643 gp->bg = term.c.attr.bg;
1644 gp->mode = 0;
1645 memcpy(gp->c, " ", 2);
1646 }
1647 }
1648 }
1649
1650 void
1651 tdeletechar(int n) {
1652 int dst, src, size;
1653 Glyph *line;
1654
1655 LIMIT(n, 0, term.col - term.c.x);
1656
1657 dst = term.c.x;
1658 src = term.c.x + n;
1659 size = term.col - src;
1660 line = term.line[term.c.y];
1661
1662 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1663 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1664 }
1665
1666 void
1667 tinsertblank(int n) {
1668 int dst, src, size;
1669 Glyph *line;
1670
1671 LIMIT(n, 0, term.col - term.c.x);
1672
1673 dst = term.c.x + n;
1674 src = term.c.x;
1675 size = term.col - dst;
1676 line = term.line[term.c.y];
1677
1678 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1679 tclearregion(src, term.c.y, dst - 1, term.c.y);
1680 }
1681
1682 void
1683 tinsertblankline(int n) {
1684 if(BETWEEN(term.c.y, term.top, term.bot))
1685 tscrolldown(term.c.y, n);
1686 }
1687
1688 void
1689 tdeleteline(int n) {
1690 if(BETWEEN(term.c.y, term.top, term.bot))
1691 tscrollup(term.c.y, n);
1692 }
1693
1694 int32_t
1695 tdefcolor(int *attr, int *npar, int l) {
1696 int32_t idx = -1;
1697 uint r, g, b;
1698
1699 switch (attr[*npar + 1]) {
1700 case 2: /* direct color in RGB space */
1701 if (*npar + 4 >= l) {
1702 fprintf(stderr,
1703 "erresc(38): Incorrect number of parameters (%d)\n",
1704 *npar);
1705 break;
1706 }
1707 r = attr[*npar + 2];
1708 g = attr[*npar + 3];
1709 b = attr[*npar + 4];
1710 *npar += 4;
1711 if(!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
1712 fprintf(stderr, "erresc: bad rgb color (%d,%d,%d)\n",
1713 r, g, b);
1714 else
1715 idx = TRUECOLOR(r, g, b);
1716 break;
1717 case 5: /* indexed color */
1718 if (*npar + 2 >= l) {
1719 fprintf(stderr,
1720 "erresc(38): Incorrect number of parameters (%d)\n",
1721 *npar);
1722 break;
1723 }
1724 *npar += 2;
1725 if(!BETWEEN(attr[*npar], 0, 255))
1726 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
1727 else
1728 idx = attr[*npar];
1729 break;
1730 case 0: /* implemented defined (only foreground) */
1731 case 1: /* transparent */
1732 case 3: /* direct color in CMY space */
1733 case 4: /* direct color in CMYK space */
1734 default:
1735 fprintf(stderr,
1736 "erresc(38): gfx attr %d unknown\n", attr[*npar]);
1737 break;
1738 }
1739
1740 return idx;
1741 }
1742
1743 void
1744 tsetattr(int *attr, int l) {
1745 int i;
1746 int32_t idx;
1747
1748 for(i = 0; i < l; i++) {
1749 switch(attr[i]) {
1750 case 0:
1751 term.c.attr.mode &= ~(
1752 ATTR_BOLD |
1753 ATTR_FAINT |
1754 ATTR_ITALIC |
1755 ATTR_UNDERLINE |
1756 ATTR_BLINK |
1757 ATTR_REVERSE |
1758 ATTR_INVISIBLE |
1759 ATTR_STRUCK );
1760 term.c.attr.fg = defaultfg;
1761 term.c.attr.bg = defaultbg;
1762 break;
1763 case 1:
1764 term.c.attr.mode |= ATTR_BOLD;
1765 break;
1766 case 2:
1767 term.c.attr.mode |= ATTR_FAINT;
1768 break;
1769 case 3:
1770 term.c.attr.mode |= ATTR_ITALIC;
1771 break;
1772 case 4:
1773 term.c.attr.mode |= ATTR_UNDERLINE;
1774 break;
1775 case 5: /* slow blink */
1776 /* FALLTHROUGH */
1777 case 6: /* rapid blink */
1778 term.c.attr.mode |= ATTR_BLINK;
1779 break;
1780 case 7:
1781 term.c.attr.mode |= ATTR_REVERSE;
1782 break;
1783 case 8:
1784 term.c.attr.mode |= ATTR_INVISIBLE;
1785 break;
1786 case 9:
1787 term.c.attr.mode |= ATTR_STRUCK;
1788 break;
1789 case 22:
1790 term.c.attr.mode &= ~(ATTR_BOLD | ATTR_FAINT);
1791 break;
1792 case 23:
1793 term.c.attr.mode &= ~ATTR_ITALIC;
1794 break;
1795 case 24:
1796 term.c.attr.mode &= ~ATTR_UNDERLINE;
1797 break;
1798 case 25:
1799 term.c.attr.mode &= ~ATTR_BLINK;
1800 break;
1801 case 27:
1802 term.c.attr.mode &= ~ATTR_REVERSE;
1803 break;
1804 case 28:
1805 term.c.attr.mode &= ~ATTR_INVISIBLE;
1806 break;
1807 case 29:
1808 term.c.attr.mode &= ~ATTR_STRUCK;
1809 break;
1810 case 38:
1811 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1812 term.c.attr.fg = idx;
1813 break;
1814 case 39:
1815 term.c.attr.fg = defaultfg;
1816 break;
1817 case 48:
1818 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1819 term.c.attr.bg = idx;
1820 break;
1821 case 49:
1822 term.c.attr.bg = defaultbg;
1823 break;
1824 default:
1825 if(BETWEEN(attr[i], 30, 37)) {
1826 term.c.attr.fg = attr[i] - 30;
1827 } else if(BETWEEN(attr[i], 40, 47)) {
1828 term.c.attr.bg = attr[i] - 40;
1829 } else if(BETWEEN(attr[i], 90, 97)) {
1830 term.c.attr.fg = attr[i] - 90 + 8;
1831 } else if(BETWEEN(attr[i], 100, 107)) {
1832 term.c.attr.bg = attr[i] - 100 + 8;
1833 } else {
1834 fprintf(stderr,
1835 "erresc(default): gfx attr %d unknown\n",
1836 attr[i]), csidump();
1837 }
1838 break;
1839 }
1840 }
1841 }
1842
1843 void
1844 tsetscroll(int t, int b) {
1845 int temp;
1846
1847 LIMIT(t, 0, term.row-1);
1848 LIMIT(b, 0, term.row-1);
1849 if(t > b) {
1850 temp = t;
1851 t = b;
1852 b = temp;
1853 }
1854 term.top = t;
1855 term.bot = b;
1856 }
1857
1858 void
1859 tsetmode(bool priv, bool set, int *args, int narg) {
1860 int *lim, mode;
1861 bool alt;
1862
1863 for(lim = args + narg; args < lim; ++args) {
1864 if(priv) {
1865 switch(*args) {
1866 case 1: /* DECCKM -- Cursor key */
1867 MODBIT(term.mode, set, MODE_APPCURSOR);
1868 break;
1869 case 5: /* DECSCNM -- Reverse video */
1870 mode = term.mode;
1871 MODBIT(term.mode, set, MODE_REVERSE);
1872 if(mode != term.mode)
1873 redraw();
1874 break;
1875 case 6: /* DECOM -- Origin */
1876 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1877 tmoveato(0, 0);
1878 break;
1879 case 7: /* DECAWM -- Auto wrap */
1880 MODBIT(term.mode, set, MODE_WRAP);
1881 break;
1882 case 0: /* Error (IGNORED) */
1883 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1884 case 3: /* DECCOLM -- Column (IGNORED) */
1885 case 4: /* DECSCLM -- Scroll (IGNORED) */
1886 case 8: /* DECARM -- Auto repeat (IGNORED) */
1887 case 18: /* DECPFF -- Printer feed (IGNORED) */
1888 case 19: /* DECPEX -- Printer extent (IGNORED) */
1889 case 42: /* DECNRCM -- National characters (IGNORED) */
1890 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1891 break;
1892 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1893 MODBIT(term.mode, !set, MODE_HIDE);
1894 break;
1895 case 9: /* X10 mouse compatibility mode */
1896 xsetpointermotion(0);
1897 MODBIT(term.mode, 0, MODE_MOUSE);
1898 MODBIT(term.mode, set, MODE_MOUSEX10);
1899 break;
1900 case 1000: /* 1000: report button press */
1901 xsetpointermotion(0);
1902 MODBIT(term.mode, 0, MODE_MOUSE);
1903 MODBIT(term.mode, set, MODE_MOUSEBTN);
1904 break;
1905 case 1002: /* 1002: report motion on button press */
1906 xsetpointermotion(0);
1907 MODBIT(term.mode, 0, MODE_MOUSE);
1908 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1909 break;
1910 case 1003: /* 1003: enable all mouse motions */
1911 xsetpointermotion(set);
1912 MODBIT(term.mode, 0, MODE_MOUSE);
1913 MODBIT(term.mode, set, MODE_MOUSEMANY);
1914 break;
1915 case 1004: /* 1004: send focus events to tty */
1916 MODBIT(term.mode, set, MODE_FOCUS);
1917 break;
1918 case 1006: /* 1006: extended reporting mode */
1919 MODBIT(term.mode, set, MODE_MOUSESGR);
1920 break;
1921 case 1034:
1922 MODBIT(term.mode, set, MODE_8BIT);
1923 break;
1924 case 1049: /* swap screen & set/restore cursor as xterm */
1925 if (!allowaltscreen)
1926 break;
1927 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1928 /* FALLTHROUGH */
1929 case 47: /* swap screen */
1930 case 1047:
1931 if (!allowaltscreen)
1932 break;
1933 alt = IS_SET(MODE_ALTSCREEN);
1934 if(alt) {
1935 tclearregion(0, 0, term.col-1,
1936 term.row-1);
1937 }
1938 if(set ^ alt) /* set is always 1 or 0 */
1939 tswapscreen();
1940 if(*args != 1049)
1941 break;
1942 /* FALLTHROUGH */
1943 case 1048:
1944 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1945 break;
1946 case 2004: /* 2004: bracketed paste mode */
1947 MODBIT(term.mode, set, MODE_BRCKTPASTE);
1948 break;
1949 /* Not implemented mouse modes. See comments there. */
1950 case 1001: /* mouse highlight mode; can hang the
1951 terminal by design when implemented. */
1952 case 1005: /* UTF-8 mouse mode; will confuse
1953 applications not supporting UTF-8
1954 and luit. */
1955 case 1015: /* urxvt mangled mouse mode; incompatible
1956 and can be mistaken for other control
1957 codes. */
1958 default:
1959 fprintf(stderr,
1960 "erresc: unknown private set/reset mode %d\n",
1961 *args);
1962 break;
1963 }
1964 } else {
1965 switch(*args) {
1966 case 0: /* Error (IGNORED) */
1967 break;
1968 case 2: /* KAM -- keyboard action */
1969 MODBIT(term.mode, set, MODE_KBDLOCK);
1970 break;
1971 case 4: /* IRM -- Insertion-replacement */
1972 MODBIT(term.mode, set, MODE_INSERT);
1973 break;
1974 case 12: /* SRM -- Send/Receive */
1975 MODBIT(term.mode, !set, MODE_ECHO);
1976 break;
1977 case 20: /* LNM -- Linefeed/new line */
1978 MODBIT(term.mode, set, MODE_CRLF);
1979 break;
1980 default:
1981 fprintf(stderr,
1982 "erresc: unknown set/reset mode %d\n",
1983 *args);
1984 break;
1985 }
1986 }
1987 }
1988 }
1989
1990 void
1991 csihandle(void) {
1992 char buf[40];
1993 int len;
1994
1995 switch(csiescseq.mode[0]) {
1996 default:
1997 unknown:
1998 fprintf(stderr, "erresc: unknown csi ");
1999 csidump();
2000 /* die(""); */
2001 break;
2002 case '@': /* ICH -- Insert <n> blank char */
2003 DEFAULT(csiescseq.arg[0], 1);
2004 tinsertblank(csiescseq.arg[0]);
2005 break;
2006 case 'A': /* CUU -- Cursor <n> Up */
2007 DEFAULT(csiescseq.arg[0], 1);
2008 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
2009 break;
2010 case 'B': /* CUD -- Cursor <n> Down */
2011 case 'e': /* VPR --Cursor <n> Down */
2012 DEFAULT(csiescseq.arg[0], 1);
2013 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
2014 break;
2015 case 'i': /* MC -- Media Copy */
2016 switch(csiescseq.arg[0]) {
2017 case 0:
2018 tdump();
2019 break;
2020 case 1:
2021 tdumpline(term.c.y);
2022 break;
2023 case 2:
2024 tdumpsel();
2025 break;
2026 case 4:
2027 term.mode &= ~MODE_PRINT;
2028 break;
2029 case 5:
2030 term.mode |= MODE_PRINT;
2031 break;
2032 }
2033 break;
2034 case 'c': /* DA -- Device Attributes */
2035 if(csiescseq.arg[0] == 0)
2036 ttywrite(vtiden, sizeof(vtiden) - 1);
2037 break;
2038 case 'C': /* CUF -- Cursor <n> Forward */
2039 case 'a': /* HPR -- Cursor <n> Forward */
2040 DEFAULT(csiescseq.arg[0], 1);
2041 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
2042 break;
2043 case 'D': /* CUB -- Cursor <n> Backward */
2044 DEFAULT(csiescseq.arg[0], 1);
2045 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
2046 break;
2047 case 'E': /* CNL -- Cursor <n> Down and first col */
2048 DEFAULT(csiescseq.arg[0], 1);
2049 tmoveto(0, term.c.y+csiescseq.arg[0]);
2050 break;
2051 case 'F': /* CPL -- Cursor <n> Up and first col */
2052 DEFAULT(csiescseq.arg[0], 1);
2053 tmoveto(0, term.c.y-csiescseq.arg[0]);
2054 break;
2055 case 'g': /* TBC -- Tabulation clear */
2056 switch(csiescseq.arg[0]) {
2057 case 0: /* clear current tab stop */
2058 term.tabs[term.c.x] = 0;
2059 break;
2060 case 3: /* clear all the tabs */
2061 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
2062 break;
2063 default:
2064 goto unknown;
2065 }
2066 break;
2067 case 'G': /* CHA -- Move to <col> */
2068 case '`': /* HPA */
2069 DEFAULT(csiescseq.arg[0], 1);
2070 tmoveto(csiescseq.arg[0]-1, term.c.y);
2071 break;
2072 case 'H': /* CUP -- Move to <row> <col> */
2073 case 'f': /* HVP */
2074 DEFAULT(csiescseq.arg[0], 1);
2075 DEFAULT(csiescseq.arg[1], 1);
2076 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
2077 break;
2078 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
2079 DEFAULT(csiescseq.arg[0], 1);
2080 tputtab(csiescseq.arg[0]);
2081 break;
2082 case 'J': /* ED -- Clear screen */
2083 selclear(NULL);
2084 switch(csiescseq.arg[0]) {
2085 case 0: /* below */
2086 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
2087 if(term.c.y < term.row-1) {
2088 tclearregion(0, term.c.y+1, term.col-1,
2089 term.row-1);
2090 }
2091 break;
2092 case 1: /* above */
2093 if(term.c.y > 1)
2094 tclearregion(0, 0, term.col-1, term.c.y-1);
2095 tclearregion(0, term.c.y, term.c.x, term.c.y);
2096 break;
2097 case 2: /* all */
2098 tclearregion(0, 0, term.col-1, term.row-1);
2099 break;
2100 default:
2101 goto unknown;
2102 }
2103 break;
2104 case 'K': /* EL -- Clear line */
2105 switch(csiescseq.arg[0]) {
2106 case 0: /* right */
2107 tclearregion(term.c.x, term.c.y, term.col-1,
2108 term.c.y);
2109 break;
2110 case 1: /* left */
2111 tclearregion(0, term.c.y, term.c.x, term.c.y);
2112 break;
2113 case 2: /* all */
2114 tclearregion(0, term.c.y, term.col-1, term.c.y);
2115 break;
2116 }
2117 break;
2118 case 'S': /* SU -- Scroll <n> line up */
2119 DEFAULT(csiescseq.arg[0], 1);
2120 tscrollup(term.top, csiescseq.arg[0]);
2121 break;
2122 case 'T': /* SD -- Scroll <n> line down */
2123 DEFAULT(csiescseq.arg[0], 1);
2124 tscrolldown(term.top, csiescseq.arg[0]);
2125 break;
2126 case 'L': /* IL -- Insert <n> blank lines */
2127 DEFAULT(csiescseq.arg[0], 1);
2128 tinsertblankline(csiescseq.arg[0]);
2129 break;
2130 case 'l': /* RM -- Reset Mode */
2131 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
2132 break;
2133 case 'M': /* DL -- Delete <n> lines */
2134 DEFAULT(csiescseq.arg[0], 1);
2135 tdeleteline(csiescseq.arg[0]);
2136 break;
2137 case 'X': /* ECH -- Erase <n> char */
2138 DEFAULT(csiescseq.arg[0], 1);
2139 tclearregion(term.c.x, term.c.y,
2140 term.c.x + csiescseq.arg[0] - 1, term.c.y);
2141 break;
2142 case 'P': /* DCH -- Delete <n> char */
2143 DEFAULT(csiescseq.arg[0], 1);
2144 tdeletechar(csiescseq.arg[0]);
2145 break;
2146 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
2147 DEFAULT(csiescseq.arg[0], 1);
2148 tputtab(-csiescseq.arg[0]);
2149 break;
2150 case 'd': /* VPA -- Move to <row> */
2151 DEFAULT(csiescseq.arg[0], 1);
2152 tmoveato(term.c.x, csiescseq.arg[0]-1);
2153 break;
2154 case 'h': /* SM -- Set terminal mode */
2155 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
2156 break;
2157 case 'm': /* SGR -- Terminal attribute (color) */
2158 tsetattr(csiescseq.arg, csiescseq.narg);
2159 break;
2160 case 'n': /* DSR – Device Status Report (cursor position) */
2161 if (csiescseq.arg[0] == 6) {
2162 len = snprintf(buf, sizeof(buf),"\033[%i;%iR",
2163 term.c.y+1, term.c.x+1);
2164 ttywrite(buf, len);
2165 }
2166 break;
2167 case 'r': /* DECSTBM -- Set Scrolling Region */
2168 if(csiescseq.priv) {
2169 goto unknown;
2170 } else {
2171 DEFAULT(csiescseq.arg[0], 1);
2172 DEFAULT(csiescseq.arg[1], term.row);
2173 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
2174 tmoveato(0, 0);
2175 }
2176 break;
2177 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
2178 tcursor(CURSOR_SAVE);
2179 break;
2180 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
2181 tcursor(CURSOR_LOAD);
2182 break;
2183 case ' ':
2184 switch (csiescseq.mode[1]) {
2185 case 'q': /* DECSCUSR -- Set Cursor Style */
2186 DEFAULT(csiescseq.arg[0], 1);
2187 if (!BETWEEN(csiescseq.arg[0], 0, 6)) {
2188 goto unknown;
2189 }
2190 xw.cursor = csiescseq.arg[0];
2191 break;
2192 default:
2193 goto unknown;
2194 }
2195 break;
2196 }
2197 }
2198
2199 void
2200 csidump(void) {
2201 int i;
2202 uint c;
2203
2204 printf("ESC[");
2205 for(i = 0; i < csiescseq.len; i++) {
2206 c = csiescseq.buf[i] & 0xff;
2207 if(isprint(c)) {
2208 putchar(c);
2209 } else if(c == '\n') {
2210 printf("(\\n)");
2211 } else if(c == '\r') {
2212 printf("(\\r)");
2213 } else if(c == 0x1b) {
2214 printf("(\\e)");
2215 } else {
2216 printf("(%02x)", c);
2217 }
2218 }
2219 putchar('\n');
2220 }
2221
2222 void
2223 csireset(void) {
2224 memset(&csiescseq, 0, sizeof(csiescseq));
2225 }
2226
2227 void
2228 strhandle(void) {
2229 char *p = NULL;
2230 int j, narg, par;
2231
2232 term.esc &= ~(ESC_STR_END|ESC_STR);
2233 strparse();
2234 narg = strescseq.narg;
2235 par = atoi(strescseq.args[0]);
2236
2237 switch(strescseq.type) {
2238 case ']': /* OSC -- Operating System Command */
2239 switch(par) {
2240 case 0:
2241 case 1:
2242 case 2:
2243 if(narg > 1)
2244 xsettitle(strescseq.args[1]);
2245 return;
2246 case 4: /* color set */
2247 if(narg < 3)
2248 break;
2249 p = strescseq.args[2];
2250 /* FALLTHROUGH */
2251 case 104: /* color reset, here p = NULL */
2252 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2253 if(xsetcolorname(j, p)) {
2254 fprintf(stderr, "erresc: invalid color %s\n", p);
2255 } else {
2256 /*
2257 * TODO if defaultbg color is changed, borders
2258 * are dirty
2259 */
2260 redraw();
2261 }
2262 return;
2263 }
2264 break;
2265 case 'k': /* old title set compatibility */
2266 xsettitle(strescseq.args[0]);
2267 return;
2268 case 'P': /* DCS -- Device Control String */
2269 case '_': /* APC -- Application Program Command */
2270 case '^': /* PM -- Privacy Message */
2271 return;
2272 }
2273
2274 fprintf(stderr, "erresc: unknown str ");
2275 strdump();
2276 }
2277
2278 void
2279 strparse(void) {
2280 int c;
2281 char *p = strescseq.buf;
2282
2283 strescseq.narg = 0;
2284 strescseq.buf[strescseq.len] = '\0';
2285
2286 if(*p == '\0')
2287 return;
2288
2289 while(strescseq.narg < STR_ARG_SIZ) {
2290 strescseq.args[strescseq.narg++] = p;
2291 while((c = *p) != ';' && c != '\0')
2292 ++p;
2293 if(c == '\0')
2294 return;
2295 *p++ = '\0';
2296 }
2297 }
2298
2299 void
2300 strdump(void) {
2301 int i;
2302 uint c;
2303
2304 printf("ESC%c", strescseq.type);
2305 for(i = 0; i < strescseq.len; i++) {
2306 c = strescseq.buf[i] & 0xff;
2307 if(c == '\0') {
2308 return;
2309 } else if(isprint(c)) {
2310 putchar(c);
2311 } else if(c == '\n') {
2312 printf("(\\n)");
2313 } else if(c == '\r') {
2314 printf("(\\r)");
2315 } else if(c == 0x1b) {
2316 printf("(\\e)");
2317 } else {
2318 printf("(%02x)", c);
2319 }
2320 }
2321 printf("ESC\\\n");
2322 }
2323
2324 void
2325 strreset(void) {
2326 memset(&strescseq, 0, sizeof(strescseq));
2327 }
2328
2329 void
2330 tprinter(char *s, size_t len) {
2331 if(iofd != -1 && xwrite(iofd, s, len) < 0) {
2332 fprintf(stderr, "Error writing in %s:%s\n",
2333 opt_io, strerror(errno));
2334 close(iofd);
2335 iofd = -1;
2336 }
2337 }
2338
2339 void
2340 toggleprinter(const Arg *arg) {
2341 term.mode ^= MODE_PRINT;
2342 }
2343
2344 void
2345 printscreen(const Arg *arg) {
2346 tdump();
2347 }
2348
2349 void
2350 printsel(const Arg *arg) {
2351 tdumpsel();
2352 }
2353
2354 void
2355 tdumpsel(void) {
2356 char *ptr;
2357
2358 if((ptr = getsel())) {
2359 tprinter(ptr, strlen(ptr));
2360 free(ptr);
2361 }
2362 }
2363
2364 void
2365 tdumpline(int n) {
2366 Glyph *bp, *end;
2367
2368 bp = &term.line[n][0];
2369 end = &bp[MIN(tlinelen(n), term.col) - 1];
2370 if(bp != end || bp->c[0] != ' ') {
2371 for( ;bp <= end; ++bp)
2372 tprinter(bp->c, utf8len(bp->c));
2373 }
2374 tprinter("\n", 1);
2375 }
2376
2377 void
2378 tdump(void) {
2379 int i;
2380
2381 for(i = 0; i < term.row; ++i)
2382 tdumpline(i);
2383 }
2384
2385 void
2386 tputtab(int n) {
2387 uint x = term.c.x;
2388
2389 if(n > 0) {
2390 while(x < term.col && n--)
2391 for(++x; x < term.col && !term.tabs[x]; ++x)
2392 /* nothing */ ;
2393 } else if(n < 0) {
2394 while(x > 0 && n++)
2395 for(--x; x > 0 && !term.tabs[x]; --x)
2396 /* nothing */ ;
2397 }
2398 term.c.x = LIMIT(x, 0, term.col-1);
2399 }
2400
2401 void
2402 techo(char *buf, int len) {
2403 for(; len > 0; buf++, len--) {
2404 char c = *buf;
2405
2406 if(ISCONTROL((uchar) c)) { /* control code */
2407 if(c & 0x80) {
2408 c &= 0x7f;
2409 tputc("^", 1);
2410 tputc("[", 1);
2411 } else if(c != '\n' && c != '\r' && c != '\t') {
2412 c ^= 0x40;
2413 tputc("^", 1);
2414 }
2415 tputc(&c, 1);
2416 } else {
2417 break;
2418 }
2419 }
2420 if(len)
2421 tputc(buf, len);
2422 }
2423
2424 void
2425 tdeftran(char ascii) {
2426 static char cs[] = "0B";
2427 static int vcs[] = {CS_GRAPHIC0, CS_USA};
2428 char *p;
2429
2430 if((p = strchr(cs, ascii)) == NULL) {
2431 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2432 } else {
2433 term.trantbl[term.icharset] = vcs[p - cs];
2434 }
2435 }
2436
2437 void
2438 tdectest(char c) {
2439 static char E[UTF_SIZ] = "E";
2440 int x, y;
2441
2442 if(c == '8') { /* DEC screen alignment test. */
2443 for(x = 0; x < term.col; ++x) {
2444 for(y = 0; y < term.row; ++y)
2445 tsetchar(E, &term.c.attr, x, y);
2446 }
2447 }
2448 }
2449
2450 void
2451 tstrsequence(uchar c) {
2452 switch (c) {
2453 case 0x90: /* DCS -- Device Control String */
2454 c = 'P';
2455 break;
2456 case 0x9f: /* APC -- Application Program Command */
2457 c = '_';
2458 break;
2459 case 0x9e: /* PM -- Privacy Message */
2460 c = '^';
2461 break;
2462 case 0x9d: /* OSC -- Operating System Command */
2463 c = ']';
2464 break;
2465 }
2466 strreset();
2467 strescseq.type = c;
2468 term.esc |= ESC_STR;
2469 return;
2470 }
2471
2472 void
2473 tcontrolcode(uchar ascii) {
2474 static char question[UTF_SIZ] = "?";
2475
2476 switch(ascii) {
2477 case '\t': /* HT */
2478 tputtab(1);
2479 return;
2480 case '\b': /* BS */
2481 tmoveto(term.c.x-1, term.c.y);
2482 return;
2483 case '\r': /* CR */
2484 tmoveto(0, term.c.y);
2485 return;
2486 case '\f': /* LF */
2487 case '\v': /* VT */
2488 case '\n': /* LF */
2489 /* go to first col if the mode is set */
2490 tnewline(IS_SET(MODE_CRLF));
2491 return;
2492 case '\a': /* BEL */
2493 if(term.esc & ESC_STR_END) {
2494 /* backwards compatibility to xterm */
2495 strhandle();
2496 } else {
2497 if(!(xw.state & WIN_FOCUSED))
2498 xseturgency(1);
2499 if (bellvolume)
2500 XkbBell(xw.dpy, xw.win, bellvolume, (Atom)NULL);
2501 }
2502 break;
2503 case '\033': /* ESC */
2504 csireset();
2505 term.esc &= ~(ESC_CSI|ESC_ALTCHARSET|ESC_TEST);
2506 term.esc |= ESC_START;
2507 return;
2508 case '\016': /* SO (LS1 -- Locking shift 1) */
2509 case '\017': /* SI (LS0 -- Locking shift 0) */
2510 term.charset = 1 - (ascii - '\016');
2511 return;
2512 case '\032': /* SUB */
2513 tsetchar(question, &term.c.attr, term.c.x, term.c.y);
2514 case '\030': /* CAN */
2515 csireset();
2516 break;
2517 case '\005': /* ENQ (IGNORED) */
2518 case '\000': /* NUL (IGNORED) */
2519 case '\021': /* XON (IGNORED) */
2520 case '\023': /* XOFF (IGNORED) */
2521 case 0177: /* DEL (IGNORED) */
2522 return;
2523 case 0x84: /* TODO: IND */
2524 break;
2525 case 0x85: /* NEL -- Next line */
2526 tnewline(1); /* always go to first col */
2527 break;
2528 case 0x88: /* HTS -- Horizontal tab stop */
2529 term.tabs[term.c.x] = 1;
2530 break;
2531 case 0x8d: /* TODO: RI */
2532 case 0x8e: /* TODO: SS2 */
2533 case 0x8f: /* TODO: SS3 */
2534 case 0x98: /* TODO: SOS */
2535 break;
2536 case 0x9a: /* DECID -- Identify Terminal */
2537 ttywrite(vtiden, sizeof(vtiden) - 1);
2538 break;
2539 case 0x9b: /* TODO: CSI */
2540 case 0x9c: /* TODO: ST */
2541 break;
2542 case 0x90: /* DCS -- Device Control String */
2543 case 0x9f: /* APC -- Application Program Command */
2544 case 0x9e: /* PM -- Privacy Message */
2545 case 0x9d: /* OSC -- Operating System Command */
2546 tstrsequence(ascii);
2547 return;
2548 }
2549 /* only CAN, SUB, \a and C1 chars interrupt a sequence */
2550 term.esc &= ~(ESC_STR_END|ESC_STR);
2551 return;
2552 }
2553
2554 /*
2555 * returns 1 when the sequence is finished and it hasn't to read
2556 * more characters for this sequence, otherwise 0
2557 */
2558 int
2559 eschandle(uchar ascii) {
2560 switch(ascii) {
2561 case '[':
2562 term.esc |= ESC_CSI;
2563 return 0;
2564 case '#':
2565 term.esc |= ESC_TEST;
2566 return 0;
2567 case 'P': /* DCS -- Device Control String */
2568 case '_': /* APC -- Application Program Command */
2569 case '^': /* PM -- Privacy Message */
2570 case ']': /* OSC -- Operating System Command */
2571 case 'k': /* old title set compatibility */
2572 tstrsequence(ascii);
2573 return 0;
2574 case 'n': /* LS2 -- Locking shift 2 */
2575 case 'o': /* LS3 -- Locking shift 3 */
2576 term.charset = 2 + (ascii - 'n');
2577 break;
2578 case '(': /* GZD4 -- set primary charset G0 */
2579 case ')': /* G1D4 -- set secondary charset G1 */
2580 case '*': /* G2D4 -- set tertiary charset G2 */
2581 case '+': /* G3D4 -- set quaternary charset G3 */
2582 term.icharset = ascii - '(';
2583 term.esc |= ESC_ALTCHARSET;
2584 return 0;
2585 case 'D': /* IND -- Linefeed */
2586 if(term.c.y == term.bot) {
2587 tscrollup(term.top, 1);
2588 } else {
2589 tmoveto(term.c.x, term.c.y+1);
2590 }
2591 break;
2592 case 'E': /* NEL -- Next line */
2593 tnewline(1); /* always go to first col */
2594 break;
2595 case 'H': /* HTS -- Horizontal tab stop */
2596 term.tabs[term.c.x] = 1;
2597 break;
2598 case 'M': /* RI -- Reverse index */
2599 if(term.c.y == term.top) {
2600 tscrolldown(term.top, 1);
2601 } else {
2602 tmoveto(term.c.x, term.c.y-1);
2603 }
2604 break;
2605 case 'Z': /* DECID -- Identify Terminal */
2606 ttywrite(vtiden, sizeof(vtiden) - 1);
2607 break;
2608 case 'c': /* RIS -- Reset to inital state */
2609 treset();
2610 xresettitle();
2611 xloadcols();
2612 break;
2613 case '=': /* DECPAM -- Application keypad */
2614 term.mode |= MODE_APPKEYPAD;
2615 break;
2616 case '>': /* DECPNM -- Normal keypad */
2617 term.mode &= ~MODE_APPKEYPAD;
2618 break;
2619 case '7': /* DECSC -- Save Cursor */
2620 tcursor(CURSOR_SAVE);
2621 break;
2622 case '8': /* DECRC -- Restore Cursor */
2623 tcursor(CURSOR_LOAD);
2624 break;
2625 case '\\': /* ST -- String Terminator */
2626 if(term.esc & ESC_STR_END)
2627 strhandle();
2628 break;
2629 default:
2630 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2631 (uchar) ascii, isprint(ascii)? ascii:'.');
2632 break;
2633 }
2634 return 1;
2635 }
2636
2637 void
2638 tputc(char *c, int len) {
2639 uchar ascii;
2640 bool control;
2641 long unicodep;
2642 int width;
2643 Glyph *gp;
2644
2645 if(len == 1) {
2646 width = 1;
2647 unicodep = ascii = *c;
2648 } else {
2649 utf8decode(c, &unicodep, UTF_SIZ);
2650 if ((width = wcwidth(unicodep)) == -1) {
2651 c = "\357\277\275"; /* UTF_INVALID */
2652 width = 1;
2653 }
2654 ascii = unicodep;
2655 }
2656
2657 if(IS_SET(MODE_PRINT))
2658 tprinter(c, len);
2659 control = ISCONTROL(unicodep);
2660
2661 /*
2662 * STR sequence must be checked before anything else
2663 * because it uses all following characters until it
2664 * receives a ESC, a SUB, a ST or any other C1 control
2665 * character.
2666 */
2667 if(term.esc & ESC_STR) {
2668 if(len == 1 &&
2669 (ascii == '\a' || ascii == 030 ||
2670 ascii == 032 || ascii == 033 ||
2671 ISCONTROLC1(unicodep))) {
2672 term.esc &= ~(ESC_START|ESC_STR);
2673 term.esc |= ESC_STR_END;
2674 } else if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2675 memmove(&strescseq.buf[strescseq.len], c, len);
2676 strescseq.len += len;
2677 return;
2678 } else {
2679 /*
2680 * Here is a bug in terminals. If the user never sends
2681 * some code to stop the str or esc command, then st
2682 * will stop responding. But this is better than
2683 * silently failing with unknown characters. At least
2684 * then users will report back.
2685 *
2686 * In the case users ever get fixed, here is the code:
2687 */
2688 /*
2689 * term.esc = 0;
2690 * strhandle();
2691 */
2692 return;
2693 }
2694 }
2695
2696 /*
2697 * Actions of control codes must be performed as soon they arrive
2698 * because they can be embedded inside a control sequence, and
2699 * they must not cause conflicts with sequences.
2700 */
2701 if(control) {
2702 tcontrolcode(ascii);
2703 /*
2704 * control codes are not shown ever
2705 */
2706 return;
2707 } else if(term.esc & ESC_START) {
2708 if(term.esc & ESC_CSI) {
2709 csiescseq.buf[csiescseq.len++] = ascii;
2710 if(BETWEEN(ascii, 0x40, 0x7E)
2711 || csiescseq.len >= \
2712 sizeof(csiescseq.buf)-1) {
2713 term.esc = 0;
2714 csiparse();
2715 csihandle();
2716 }
2717 return;
2718 } else if(term.esc & ESC_ALTCHARSET) {
2719 tdeftran(ascii);
2720 } else if(term.esc & ESC_TEST) {
2721 tdectest(ascii);
2722 } else {
2723 if (!eschandle(ascii))
2724 return;
2725 /* sequence already finished */
2726 }
2727 term.esc = 0;
2728 /*
2729 * All characters which form part of a sequence are not
2730 * printed
2731 */
2732 return;
2733 }
2734 if(sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
2735 selclear(NULL);
2736
2737 gp = &term.line[term.c.y][term.c.x];
2738 if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2739 gp->mode |= ATTR_WRAP;
2740 tnewline(1);
2741 gp = &term.line[term.c.y][term.c.x];
2742 }
2743
2744 if(IS_SET(MODE_INSERT) && term.c.x+width < term.col)
2745 memmove(gp+width, gp, (term.col - term.c.x - width) * sizeof(Glyph));
2746
2747 if(term.c.x+width > term.col) {
2748 tnewline(1);
2749 gp = &term.line[term.c.y][term.c.x];
2750 }
2751
2752 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2753
2754 if(width == 2) {
2755 gp->mode |= ATTR_WIDE;
2756 if(term.c.x+1 < term.col) {
2757 gp[1].c[0] = '\0';
2758 gp[1].mode = ATTR_WDUMMY;
2759 }
2760 }
2761 if(term.c.x+width < term.col) {
2762 tmoveto(term.c.x+width, term.c.y);
2763 } else {
2764 term.c.state |= CURSOR_WRAPNEXT;
2765 }
2766 }
2767
2768 void
2769 tresize(int col, int row) {
2770 int i;
2771 int minrow = MIN(row, term.row);
2772 int mincol = MIN(col, term.col);
2773 bool *bp;
2774 TCursor c;
2775
2776 if(col < 1 || row < 1) {
2777 fprintf(stderr,
2778 "tresize: error resizing to %dx%d\n", col, row);
2779 return;
2780 }
2781
2782 /*
2783 * slide screen to keep cursor where we expect it -
2784 * tscrollup would work here, but we can optimize to
2785 * memmove because we're freeing the earlier lines
2786 */
2787 for(i = 0; i <= term.c.y - row; i++) {
2788 free(term.line[i]);
2789 free(term.alt[i]);
2790 }
2791 /* ensure that both src and dst are not NULL */
2792 if (i > 0) {
2793 memmove(term.line, term.line + i, row * sizeof(Line));
2794 memmove(term.alt, term.alt + i, row * sizeof(Line));
2795 }
2796 for(i += row; i < term.row; i++) {
2797 free(term.line[i]);
2798 free(term.alt[i]);
2799 }
2800
2801 /* resize to new height */
2802 term.line = xrealloc(term.line, row * sizeof(Line));
2803 term.alt = xrealloc(term.alt, row * sizeof(Line));
2804 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2805 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2806
2807 /* resize each row to new width, zero-pad if needed */
2808 for(i = 0; i < minrow; i++) {
2809 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2810 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2811 }
2812
2813 /* allocate any new rows */
2814 for(/* i == minrow */; i < row; i++) {
2815 term.line[i] = xmalloc(col * sizeof(Glyph));
2816 term.alt[i] = xmalloc(col * sizeof(Glyph));
2817 }
2818 if(col > term.col) {
2819 bp = term.tabs + term.col;
2820
2821 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2822 while(--bp > term.tabs && !*bp)
2823 /* nothing */ ;
2824 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2825 *bp = 1;
2826 }
2827 /* update terminal size */
2828 term.col = col;
2829 term.row = row;
2830 /* reset scrolling region */
2831 tsetscroll(0, row-1);
2832 /* make use of the LIMIT in tmoveto */
2833 tmoveto(term.c.x, term.c.y);
2834 /* Clearing both screens (it makes dirty all lines) */
2835 c = term.c;
2836 for(i = 0; i < 2; i++) {
2837 if(mincol < col && 0 < minrow) {
2838 tclearregion(mincol, 0, col - 1, minrow - 1);
2839 }
2840 if(0 < col && minrow < row) {
2841 tclearregion(0, minrow, col - 1, row - 1);
2842 }
2843 tswapscreen();
2844 tcursor(CURSOR_LOAD);
2845 }
2846 term.c = c;
2847 }
2848
2849 void
2850 xresize(int col, int row) {
2851 xw.tw = MAX(1, col * xw.cw);
2852 xw.th = MAX(1, row * xw.ch);
2853
2854 XFreePixmap(xw.dpy, xw.buf);
2855 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2856 DefaultDepth(xw.dpy, xw.scr));
2857 XftDrawChange(xw.draw, xw.buf);
2858 xclear(0, 0, xw.w, xw.h);
2859 }
2860
2861 ushort
2862 sixd_to_16bit(int x) {
2863 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2864 }
2865
2866 void
2867 xloadcols(void) {
2868 int i;
2869 XRenderColor color = { .alpha = 0xffff };
2870 static bool loaded;
2871 Color *cp;
2872
2873 if(loaded) {
2874 for (cp = dc.col; cp < dc.col + LEN(dc.col); ++cp)
2875 XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
2876 }
2877
2878 /* load colors [0-15] and [256-LEN(colorname)] (config.h) */
2879 for(i = 0; i < LEN(colorname); i++) {
2880 if(!colorname[i])
2881 continue;
2882 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2883 die("Could not allocate color '%s'\n", colorname[i]);
2884 }
2885 }
2886
2887 /* load colors [16-231] ; same colors as xterm */
2888 for(i = 16; i < 6*6*6+16; i++) {
2889 color.red = sixd_to_16bit( ((i-16)/36)%6 );
2890 color.green = sixd_to_16bit( ((i-16)/6) %6 );
2891 color.blue = sixd_to_16bit( ((i-16)/1) %6 );
2892 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i]))
2893 die("Could not allocate color %d\n", i);
2894 }
2895
2896 /* load colors [232-255] ; grayscale */
2897 for(; i < 256; i++) {
2898 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (i-(6*6*6+16));
2899 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i]))
2900 die("Could not allocate color %d\n", i);
2901 }
2902 loaded = true;
2903 }
2904
2905 int
2906 xsetcolorname(int x, const char *name) {
2907 XRenderColor color = { .alpha = 0xffff };
2908 Color ncolor;
2909
2910 if(!BETWEEN(x, 0, LEN(colorname)))
2911 return 1;
2912
2913 if(!name) {
2914 if(BETWEEN(x, 16, 16 + 215)) { /* 256 color */
2915 color.red = sixd_to_16bit( ((x-16)/36)%6 );
2916 color.green = sixd_to_16bit( ((x-16)/6) %6 );
2917 color.blue = sixd_to_16bit( ((x-16)/1) %6 );
2918 if(!XftColorAllocValue(xw.dpy, xw.vis,
2919 xw.cmap, &color, &ncolor)) {
2920 return 1;
2921 }
2922
2923 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2924 dc.col[x] = ncolor;
2925 return 0;
2926 } else if(BETWEEN(x, 16 + 216, 255)) { /* greyscale */
2927 color.red = color.green = color.blue = \
2928 0x0808 + 0x0a0a * (x - (16 + 216));
2929 if(!XftColorAllocValue(xw.dpy, xw.vis,
2930 xw.cmap, &color, &ncolor)) {
2931 return 1;
2932 }
2933
2934 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2935 dc.col[x] = ncolor;
2936 return 0;
2937 } else { /* system colors */
2938 name = colorname[x];
2939 }
2940 }
2941 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &ncolor))
2942 return 1;
2943
2944 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2945 dc.col[x] = ncolor;
2946 return 0;
2947 }
2948
2949 void
2950 xtermclear(int col1, int row1, int col2, int row2) {
2951 XftDrawRect(xw.draw,
2952 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2953 borderpx + col1 * xw.cw,
2954 borderpx + row1 * xw.ch,
2955 (col2-col1+1) * xw.cw,
2956 (row2-row1+1) * xw.ch);
2957 }
2958
2959 /*
2960 * Absolute coordinates.
2961 */
2962 void
2963 xclear(int x1, int y1, int x2, int y2) {
2964 XftDrawRect(xw.draw,
2965 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2966 x1, y1, x2-x1, y2-y1);
2967 }
2968
2969 void
2970 xhints(void) {
2971 XClassHint class = {opt_class ? opt_class : termname, termname};
2972 XWMHints wm = {.flags = InputHint, .input = 1};
2973 XSizeHints *sizeh = NULL;
2974
2975 sizeh = XAllocSizeHints();
2976
2977 sizeh->flags = PSize | PResizeInc | PBaseSize;
2978 sizeh->height = xw.h;
2979 sizeh->width = xw.w;
2980 sizeh->height_inc = xw.ch;
2981 sizeh->width_inc = xw.cw;
2982 sizeh->base_height = 2 * borderpx;
2983 sizeh->base_width = 2 * borderpx;
2984 if(xw.isfixed == True) {
2985 sizeh->flags |= PMaxSize | PMinSize;
2986 sizeh->min_width = sizeh->max_width = xw.w;
2987 sizeh->min_height = sizeh->max_height = xw.h;
2988 }
2989 if(xw.gm & (XValue|YValue)) {
2990 sizeh->flags |= USPosition | PWinGravity;
2991 sizeh->x = xw.l;
2992 sizeh->y = xw.t;
2993 sizeh->win_gravity = xgeommasktogravity(xw.gm);
2994 }
2995
2996 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
2997 &class);
2998 XFree(sizeh);
2999 }
3000
3001 int
3002 xgeommasktogravity(int mask) {
3003 switch(mask & (XNegative|YNegative)) {
3004 case 0:
3005 return NorthWestGravity;
3006 case XNegative:
3007 return NorthEastGravity;
3008 case YNegative:
3009 return SouthWestGravity;
3010 }
3011 return SouthEastGravity;
3012 }
3013
3014 int
3015 xloadfont(Font *f, FcPattern *pattern) {
3016 FcPattern *match;
3017 FcResult result;
3018
3019 match = FcFontMatch(NULL, pattern, &result);
3020 if(!match)
3021 return 1;
3022
3023 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
3024 FcPatternDestroy(match);
3025 return 1;
3026 }
3027
3028 f->set = NULL;
3029 f->pattern = FcPatternDuplicate(pattern);
3030
3031 f->ascent = f->match->ascent;
3032 f->descent = f->match->descent;
3033 f->lbearing = 0;
3034 f->rbearing = f->match->max_advance_width;
3035
3036 f->height = f->ascent + f->descent;
3037 f->width = f->lbearing + f->rbearing;
3038
3039 return 0;
3040 }
3041
3042 void
3043 xloadfonts(char *fontstr, double fontsize) {
3044 FcPattern *pattern;
3045 FcResult r_sz, r_psz;
3046 double fontval;
3047 float ceilf(float);
3048
3049 if(fontstr[0] == '-') {
3050 pattern = XftXlfdParse(fontstr, False, False);
3051 } else {
3052 pattern = FcNameParse((FcChar8 *)fontstr);
3053 }
3054
3055 if(!pattern)
3056 die("st: can't open font %s\n", fontstr);
3057
3058 if(fontsize > 1) {
3059 FcPatternDel(pattern, FC_PIXEL_SIZE);
3060 FcPatternDel(pattern, FC_SIZE);
3061 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
3062 usedfontsize = fontsize;
3063 } else {
3064 r_psz = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
3065 r_sz = FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval);
3066 if(r_psz == FcResultMatch) {
3067 usedfontsize = fontval;
3068 } else if(r_sz == FcResultMatch) {
3069 usedfontsize = -1;
3070 } else {
3071 /*
3072 * Default font size is 12, if none given. This is to
3073 * have a known usedfontsize value.
3074 */
3075 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
3076 usedfontsize = 12;
3077 }
3078 defaultfontsize = usedfontsize;
3079 }
3080
3081 FcConfigSubstitute(0, pattern, FcMatchPattern);
3082 FcDefaultSubstitute(pattern);
3083
3084 if(xloadfont(&dc.font, pattern))
3085 die("st: can't open font %s\n", fontstr);
3086
3087 if(usedfontsize < 0) {
3088 FcPatternGetDouble(dc.font.match->pattern,
3089 FC_PIXEL_SIZE, 0, &fontval);
3090 usedfontsize = fontval;
3091 if(fontsize == 0)
3092 defaultfontsize = fontval;
3093 }
3094
3095 /* Setting character width and height. */
3096 xw.cw = ceilf(dc.font.width * cwscale);
3097 xw.ch = ceilf(dc.font.height * chscale);
3098
3099 FcPatternDel(pattern, FC_SLANT);
3100 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
3101 if(xloadfont(&dc.ifont, pattern))
3102 die("st: can't open font %s\n", fontstr);
3103
3104 FcPatternDel(pattern, FC_WEIGHT);
3105 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
3106 if(xloadfont(&dc.ibfont, pattern))
3107 die("st: can't open font %s\n", fontstr);
3108
3109 FcPatternDel(pattern, FC_SLANT);
3110 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
3111 if(xloadfont(&dc.bfont, pattern))
3112 die("st: can't open font %s\n", fontstr);
3113
3114 FcPatternDestroy(pattern);
3115 }
3116
3117 void
3118 xunloadfont(Font *f) {
3119 XftFontClose(xw.dpy, f->match);
3120 FcPatternDestroy(f->pattern);
3121 if(f->set)
3122 FcFontSetDestroy(f->set);
3123 }
3124
3125 void
3126 xunloadfonts(void) {
3127 /* Free the loaded fonts in the font cache. */
3128 while(frclen > 0)
3129 XftFontClose(xw.dpy, frc[--frclen].font);
3130
3131 xunloadfont(&dc.font);
3132 xunloadfont(&dc.bfont);
3133 xunloadfont(&dc.ifont);
3134 xunloadfont(&dc.ibfont);
3135 }
3136
3137 void
3138 xzoom(const Arg *arg) {
3139 Arg larg;
3140
3141 larg.i = usedfontsize + arg->i;
3142 xzoomabs(&larg);
3143 }
3144
3145 void
3146 xzoomabs(const Arg *arg) {
3147 xunloadfonts();
3148 xloadfonts(usedfont, arg->i);
3149 cresize(0, 0);
3150 redraw();
3151 xhints();
3152 }
3153
3154 void
3155 xzoomreset(const Arg *arg) {
3156 Arg larg;
3157
3158 if(defaultfontsize > 0) {
3159 larg.i = defaultfontsize;
3160 xzoomabs(&larg);
3161 }
3162 }
3163
3164 void
3165 xinit(void) {
3166 XGCValues gcvalues;
3167 Cursor cursor;
3168 Window parent;
3169 pid_t thispid = getpid();
3170
3171 if(!(xw.dpy = XOpenDisplay(NULL)))
3172 die("Can't open display\n");
3173 xw.scr = XDefaultScreen(xw.dpy);
3174 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
3175
3176 /* font */
3177 if(!FcInit())
3178 die("Could not init fontconfig.\n");
3179
3180 usedfont = (opt_font == NULL)? font : opt_font;
3181 xloadfonts(usedfont, 0);
3182
3183 /* colors */
3184 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
3185 xloadcols();
3186
3187 /* adjust fixed window geometry */
3188 xw.w = 2 * borderpx + term.col * xw.cw;
3189 xw.h = 2 * borderpx + term.row * xw.ch;
3190 if(xw.gm & XNegative)
3191 xw.l += DisplayWidth(xw.dpy, xw.scr) - xw.w - 2;
3192 if(xw.gm & YNegative)
3193 xw.t += DisplayWidth(xw.dpy, xw.scr) - xw.h - 2;
3194
3195 /* Events */
3196 xw.attrs.background_pixel = dc.col[defaultbg].pixel;
3197 xw.attrs.border_pixel = dc.col[defaultbg].pixel;
3198 xw.attrs.bit_gravity = NorthWestGravity;
3199 xw.attrs.event_mask = FocusChangeMask | KeyPressMask
3200 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
3201 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
3202 xw.attrs.colormap = xw.cmap;
3203
3204 if (!(opt_embed && (parent = strtol(opt_embed, NULL, 0))))
3205 parent = XRootWindow(xw.dpy, xw.scr);
3206 xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
3207 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
3208 xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
3209 | CWEventMask | CWColormap, &xw.attrs);
3210
3211 memset(&gcvalues, 0, sizeof(gcvalues));
3212 gcvalues.graphics_exposures = False;
3213 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
3214 &gcvalues);
3215 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
3216 DefaultDepth(xw.dpy, xw.scr));
3217 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
3218 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
3219
3220 /* Xft rendering context */
3221 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
3222
3223 /* input methods */
3224 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3225 XSetLocaleModifiers("@im=local");
3226 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3227 XSetLocaleModifiers("@im=");
3228 if((xw.xim = XOpenIM(xw.dpy,
3229 NULL, NULL, NULL)) == NULL) {
3230 die("XOpenIM failed. Could not open input"
3231 " device.\n");
3232 }
3233 }
3234 }
3235 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
3236 | XIMStatusNothing, XNClientWindow, xw.win,
3237 XNFocusWindow, xw.win, NULL);
3238 if(xw.xic == NULL)
3239 die("XCreateIC failed. Could not obtain input method.\n");
3240
3241 /* white cursor, black outline */
3242 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
3243 XDefineCursor(xw.dpy, xw.win, cursor);
3244 XRecolorCursor(xw.dpy, cursor,
3245 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
3246 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
3247
3248 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
3249 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
3250 xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
3251 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
3252
3253 xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
3254 XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
3255 PropModeReplace, (uchar *)&thispid, 1);
3256
3257 xresettitle();
3258 XMapWindow(xw.dpy, xw.win);
3259 xhints();
3260 XSync(xw.dpy, False);
3261 }
3262
3263 void
3264 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
3265 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
3266 width = charlen * xw.cw, xp, i;
3267 int frcflags, charexists;
3268 int u8fl, u8fblen, u8cblen, doesexist;
3269 char *u8c, *u8fs;
3270 long unicodep;
3271 Font *font = &dc.font;
3272 FcResult fcres;
3273 FcPattern *fcpattern, *fontpattern;
3274 FcFontSet *fcsets[] = { NULL };
3275 FcCharSet *fccharset;
3276 Color *fg, *bg, *temp, revfg, revbg, truefg, truebg;
3277 XRenderColor colfg, colbg;
3278 XRectangle r;
3279 int oneatatime;
3280
3281 frcflags = FRC_NORMAL;
3282
3283 if(base.mode & ATTR_ITALIC) {
3284 if(base.fg == defaultfg)
3285 base.fg = defaultitalic;
3286 font = &dc.ifont;
3287 frcflags = FRC_ITALIC;
3288 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
3289 if(base.fg == defaultfg)
3290 base.fg = defaultitalic;
3291 font = &dc.ibfont;
3292 frcflags = FRC_ITALICBOLD;
3293 } else if(base.mode & ATTR_UNDERLINE) {
3294 if(base.fg == defaultfg)
3295 base.fg = defaultunderline;
3296 }
3297
3298 if(IS_TRUECOL(base.fg)) {
3299 colfg.alpha = 0xffff;
3300 colfg.red = TRUERED(base.fg);
3301 colfg.green = TRUEGREEN(base.fg);
3302 colfg.blue = TRUEBLUE(base.fg);
3303 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
3304 fg = &truefg;
3305 } else {
3306 fg = &dc.col[base.fg];
3307 }
3308
3309 if(IS_TRUECOL(base.bg)) {
3310 colbg.alpha = 0xffff;
3311 colbg.green = TRUEGREEN(base.bg);
3312 colbg.red = TRUERED(base.bg);
3313 colbg.blue = TRUEBLUE(base.bg);
3314 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
3315 bg = &truebg;
3316 } else {
3317 bg = &dc.col[base.bg];
3318 }
3319
3320 if(base.mode & ATTR_BOLD) {
3321 /*
3322 * change basic system colors [0-7]
3323 * to bright system colors [8-15]
3324 */
3325 if(BETWEEN(base.fg, 0, 7) && !(base.mode & ATTR_FAINT))
3326 fg = &dc.col[base.fg + 8];
3327
3328 if(base.mode & ATTR_ITALIC) {
3329 font = &dc.ibfont;
3330 frcflags = FRC_ITALICBOLD;
3331 } else {
3332 font = &dc.bfont;
3333 frcflags = FRC_BOLD;
3334 }
3335 }
3336
3337 if(IS_SET(MODE_REVERSE)) {
3338 if(fg == &dc.col[defaultfg]) {
3339 fg = &dc.col[defaultbg];
3340 } else {
3341 colfg.red = ~fg->color.red;
3342 colfg.green = ~fg->color.green;
3343 colfg.blue = ~fg->color.blue;
3344 colfg.alpha = fg->color.alpha;
3345 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
3346 &revfg);
3347 fg = &revfg;
3348 }
3349
3350 if(bg == &dc.col[defaultbg]) {
3351 bg = &dc.col[defaultfg];
3352 } else {
3353 colbg.red = ~bg->color.red;
3354 colbg.green = ~bg->color.green;
3355 colbg.blue = ~bg->color.blue;
3356 colbg.alpha = bg->color.alpha;
3357 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
3358 &revbg);
3359 bg = &revbg;
3360 }
3361 }
3362
3363 if(base.mode & ATTR_REVERSE) {
3364 temp = fg;
3365 fg = bg;
3366 bg = temp;
3367 }
3368
3369 if(base.mode & ATTR_FAINT && !(base.mode & ATTR_BOLD)) {
3370 colfg.red = fg->color.red / 2;
3371 colfg.green = fg->color.green / 2;
3372 colfg.blue = fg->color.blue / 2;
3373 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
3374 fg = &revfg;
3375 }
3376
3377 if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
3378 fg = bg;
3379
3380 if(base.mode & ATTR_INVISIBLE)
3381 fg = bg;
3382
3383 /* Intelligent cleaning up of the borders. */
3384 if(x == 0) {
3385 xclear(0, (y == 0)? 0 : winy, borderpx,
3386 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
3387 }
3388 if(x + charlen >= term.col) {
3389 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
3390 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
3391 }
3392 if(y == 0)
3393 xclear(winx, 0, winx + width, borderpx);
3394 if(y == term.row-1)
3395 xclear(winx, winy + xw.ch, winx + width, xw.h);
3396
3397 /* Clean up the region we want to draw to. */
3398 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
3399
3400 /* Set the clip region because Xft is sometimes dirty. */
3401 r.x = 0;
3402 r.y = 0;
3403 r.height = xw.ch;
3404 r.width = width;
3405 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
3406
3407 for(xp = winx; bytelen > 0;) {
3408 /*
3409 * Search for the range in the to be printed string of glyphs
3410 * that are in the main font. Then print that range. If
3411 * some glyph is found that is not in the font, do the
3412 * fallback dance.
3413 */
3414 u8fs = s;
3415 u8fblen = 0;
3416 u8fl = 0;
3417 oneatatime = font->width != xw.cw;
3418 for(;;) {
3419 u8c = s;
3420 u8cblen = utf8decode(s, &unicodep, UTF_SIZ);
3421 s += u8cblen;
3422 bytelen -= u8cblen;
3423
3424 doesexist = XftCharExists(xw.dpy, font->match, unicodep);
3425 if(doesexist) {
3426 u8fl++;
3427 u8fblen += u8cblen;
3428 if(!oneatatime && bytelen > 0)
3429 continue;
3430 }
3431
3432 if(u8fl > 0) {
3433 XftDrawStringUtf8(xw.draw, fg,
3434 font->match, xp,
3435 winy + font->ascent,
3436 (FcChar8 *)u8fs,
3437 u8fblen);
3438 xp += xw.cw * u8fl;
3439 }
3440 break;
3441 }
3442 if(doesexist) {
3443 if(oneatatime)
3444 continue;
3445 break;
3446 }
3447
3448 /* Search the font cache. */
3449 for(i = 0; i < frclen; i++) {
3450 charexists = XftCharExists(xw.dpy, frc[i].font, unicodep);
3451 /* Everything correct. */
3452 if(charexists && frc[i].flags == frcflags)
3453 break;
3454 /* We got a default font for a not found glyph. */
3455 if(!charexists && frc[i].flags == frcflags \
3456 && frc[i].unicodep == unicodep) {
3457 break;
3458 }
3459 }
3460
3461 /* Nothing was found. */
3462 if(i >= frclen) {
3463 if(!font->set)
3464 font->set = FcFontSort(0, font->pattern,
3465 FcTrue, 0, &fcres);
3466 fcsets[0] = font->set;
3467
3468 /*
3469 * Nothing was found in the cache. Now use
3470 * some dozen of Fontconfig calls to get the
3471 * font for one single character.
3472 *
3473 * Xft and fontconfig are design failures.
3474 */
3475 fcpattern = FcPatternDuplicate(font->pattern);
3476 fccharset = FcCharSetCreate();
3477
3478 FcCharSetAddChar(fccharset, unicodep);
3479 FcPatternAddCharSet(fcpattern, FC_CHARSET,
3480 fccharset);
3481 FcPatternAddBool(fcpattern, FC_SCALABLE,
3482 FcTrue);
3483
3484 FcConfigSubstitute(0, fcpattern,
3485 FcMatchPattern);
3486 FcDefaultSubstitute(fcpattern);
3487
3488 fontpattern = FcFontSetMatch(0, fcsets, 1,
3489 fcpattern, &fcres);
3490
3491 /*
3492 * Overwrite or create the new cache entry.
3493 */
3494 if(frclen >= LEN(frc)) {
3495 frclen = LEN(frc) - 1;
3496 XftFontClose(xw.dpy, frc[frclen].font);
3497 frc[frclen].unicodep = 0;
3498 }
3499
3500 frc[frclen].font = XftFontOpenPattern(xw.dpy,
3501 fontpattern);
3502 frc[frclen].flags = frcflags;
3503 frc[frclen].unicodep = unicodep;
3504
3505 i = frclen;
3506 frclen++;
3507
3508 FcPatternDestroy(fcpattern);
3509 FcCharSetDestroy(fccharset);
3510 }
3511
3512 XftDrawStringUtf8(xw.draw, fg, frc[i].font,
3513 xp, winy + frc[i].font->ascent,
3514 (FcChar8 *)u8c, u8cblen);
3515
3516 xp += xw.cw * wcwidth(unicodep);
3517 }
3518
3519 /*
3520 * This is how the loop above actually should be. Why does the
3521 * application have to care about font details?
3522 *
3523 * I have to repeat: Xft and Fontconfig are design failures.
3524 */
3525 /*
3526 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
3527 winy + font->ascent, (FcChar8 *)s, bytelen);
3528 */
3529
3530 if(base.mode & ATTR_UNDERLINE) {
3531 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
3532 width, 1);
3533 }
3534
3535 if(base.mode & ATTR_STRUCK) {
3536 XftDrawRect(xw.draw, fg, winx, winy + 2 * font->ascent / 3,
3537 width, 1);
3538 }
3539
3540 /* Reset clip to none. */
3541 XftDrawSetClip(xw.draw, 0);
3542 }
3543
3544 void
3545 xdrawcursor(void) {
3546 static int oldx = 0, oldy = 0;
3547 int sl, width, curx;
3548 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
3549
3550 LIMIT(oldx, 0, term.col-1);
3551 LIMIT(oldy, 0, term.row-1);
3552
3553 curx = term.c.x;
3554
3555 /* adjust position if in dummy */
3556 if(term.line[oldy][oldx].mode & ATTR_WDUMMY)
3557 oldx--;
3558 if(term.line[term.c.y][curx].mode & ATTR_WDUMMY)
3559 curx--;
3560
3561 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
3562
3563 /* remove the old cursor */
3564 sl = utf8len(term.line[oldy][oldx].c);
3565 width = (term.line[oldy][oldx].mode & ATTR_WIDE)? 2 : 1;
3566 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
3567 oldy, width, sl);
3568
3569 if(IS_SET(MODE_HIDE))
3570 return;
3571
3572 /* draw the new one */
3573 if(xw.state & WIN_FOCUSED) {
3574 switch (xw.cursor) {
3575 case 0: /* Blinking Block */
3576 case 1: /* Blinking Block (Default) */
3577 case 2: /* Steady Block */
3578 if(IS_SET(MODE_REVERSE)) {
3579 g.mode |= ATTR_REVERSE;
3580 g.fg = defaultcs;
3581 g.bg = defaultfg;
3582 }
3583
3584 sl = utf8len(g.c);
3585 width = (term.line[term.c.y][curx].mode & ATTR_WIDE)\
3586 ? 2 : 1;
3587 xdraws(g.c, g, term.c.x, term.c.y, width, sl);
3588 break;
3589 case 3: /* Blinking Underline */
3590 case 4: /* Steady Underline */
3591 XftDrawRect(xw.draw, &dc.col[defaultcs],
3592 borderpx + curx * xw.cw,
3593 borderpx + (term.c.y + 1) * xw.ch - cursorthickness,
3594 xw.cw, cursorthickness);
3595 break;
3596 case 5: /* Blinking bar */
3597 case 6: /* Steady bar */
3598 XftDrawRect(xw.draw, &dc.col[defaultcs],
3599 borderpx + curx * xw.cw,
3600 borderpx + term.c.y * xw.ch,
3601 cursorthickness, xw.ch);
3602 break;
3603 }
3604 } else {
3605 XftDrawRect(xw.draw, &dc.col[defaultcs],
3606 borderpx + curx * xw.cw,
3607 borderpx + term.c.y * xw.ch,
3608 xw.cw - 1, 1);
3609 XftDrawRect(xw.draw, &dc.col[defaultcs],
3610 borderpx + curx * xw.cw,
3611 borderpx + term.c.y * xw.ch,
3612 1, xw.ch - 1);
3613 XftDrawRect(xw.draw, &dc.col[defaultcs],
3614 borderpx + (curx + 1) * xw.cw - 1,
3615 borderpx + term.c.y * xw.ch,
3616 1, xw.ch - 1);
3617 XftDrawRect(xw.draw, &dc.col[defaultcs],
3618 borderpx + curx * xw.cw,
3619 borderpx + (term.c.y + 1) * xw.ch - 1,
3620 xw.cw, 1);
3621 }
3622 oldx = curx, oldy = term.c.y;
3623 }
3624
3625
3626 void
3627 xsettitle(char *p) {
3628 XTextProperty prop;
3629
3630 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3631 &prop);
3632 XSetWMName(xw.dpy, xw.win, &prop);
3633 XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
3634 XFree(prop.value);
3635 }
3636
3637 void
3638 xresettitle(void) {
3639 xsettitle(opt_title ? opt_title : "st");
3640 }
3641
3642 void
3643 redraw(void) {
3644 tfulldirt();
3645 draw();
3646 }
3647
3648 void
3649 draw(void) {
3650 drawregion(0, 0, term.col, term.row);
3651 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3652 xw.h, 0, 0);
3653 XSetForeground(xw.dpy, dc.gc,
3654 dc.col[IS_SET(MODE_REVERSE)?
3655 defaultfg : defaultbg].pixel);
3656 }
3657
3658 void
3659 drawregion(int x1, int y1, int x2, int y2) {
3660 int ic, ib, x, y, ox, sl;
3661 Glyph base, new;
3662 char buf[DRAW_BUF_SIZ];
3663 bool ena_sel = sel.ob.x != -1 && sel.alt == IS_SET(MODE_ALTSCREEN);
3664 long unicodep;
3665
3666 if(!(xw.state & WIN_VISIBLE))
3667 return;
3668
3669 for(y = y1; y < y2; y++) {
3670 if(!term.dirty[y])
3671 continue;
3672
3673 xtermclear(0, y, term.col, y);
3674 term.dirty[y] = 0;
3675 base = term.line[y][0];
3676 ic = ib = ox = 0;
3677 for(x = x1; x < x2; x++) {
3678 new = term.line[y][x];
3679 if(new.mode == ATTR_WDUMMY)
3680 continue;
3681 if(ena_sel && selected(x, y))
3682 new.mode ^= ATTR_REVERSE;
3683 if(ib > 0 && (ATTRCMP(base, new)
3684 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3685 xdraws(buf, base, ox, y, ic, ib);
3686 ic = ib = 0;
3687 }
3688 if(ib == 0) {
3689 ox = x;
3690 base = new;
3691 }
3692
3693 sl = utf8decode(new.c, &unicodep, UTF_SIZ);
3694 memcpy(buf+ib, new.c, sl);
3695 ib += sl;
3696 ic += (new.mode & ATTR_WIDE)? 2 : 1;
3697 }
3698 if(ib > 0)
3699 xdraws(buf, base, ox, y, ic, ib);
3700 }
3701 xdrawcursor();
3702 }
3703
3704 void
3705 expose(XEvent *ev) {
3706 XExposeEvent *e = &ev->xexpose;
3707
3708 if(xw.state & WIN_REDRAW) {
3709 if(!e->count)
3710 xw.state &= ~WIN_REDRAW;
3711 }
3712 redraw();
3713 }
3714
3715 void
3716 visibility(XEvent *ev) {
3717 XVisibilityEvent *e = &ev->xvisibility;
3718
3719 if(e->state == VisibilityFullyObscured) {
3720 xw.state &= ~WIN_VISIBLE;
3721 } else if(!(xw.state & WIN_VISIBLE)) {
3722 /* need a full redraw for next Expose, not just a buf copy */
3723 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3724 }
3725 }
3726
3727 void
3728 unmap(XEvent *ev) {
3729 xw.state &= ~WIN_VISIBLE;
3730 }
3731
3732 void
3733 xsetpointermotion(int set) {
3734 MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
3735 XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
3736 }
3737
3738 void
3739 xseturgency(int add) {
3740 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3741
3742 MODBIT(h->flags, add, XUrgencyHint);
3743 XSetWMHints(xw.dpy, xw.win, h);
3744 XFree(h);
3745 }
3746
3747 void
3748 focus(XEvent *ev) {
3749 XFocusChangeEvent *e = &ev->xfocus;
3750
3751 if(e->mode == NotifyGrab)
3752 return;
3753
3754 if(ev->type == FocusIn) {
3755 XSetICFocus(xw.xic);
3756 xw.state |= WIN_FOCUSED;
3757 xseturgency(0);
3758 if(IS_SET(MODE_FOCUS))
3759 ttywrite("\033[I", 3);
3760 } else {
3761 XUnsetICFocus(xw.xic);
3762 xw.state &= ~WIN_FOCUSED;
3763 if(IS_SET(MODE_FOCUS))
3764 ttywrite("\033[O", 3);
3765 }
3766 }
3767
3768 bool
3769 match(uint mask, uint state) {
3770 return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
3771 }
3772
3773 void
3774 numlock(const Arg *dummy) {
3775 term.numlock ^= 1;
3776 }
3777
3778 char*
3779 kmap(KeySym k, uint state) {
3780 Key *kp;
3781 int i;
3782
3783 /* Check for mapped keys out of X11 function keys. */
3784 for(i = 0; i < LEN(mappedkeys); i++) {
3785 if(mappedkeys[i] == k)
3786 break;
3787 }
3788 if(i == LEN(mappedkeys)) {
3789 if((k & 0xFFFF) < 0xFD00)
3790 return NULL;
3791 }
3792
3793 for(kp = key; kp < key + LEN(key); kp++) {
3794 if(kp->k != k)
3795 continue;
3796
3797 if(!match(kp->mask, state))
3798 continue;
3799
3800 if(IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
3801 continue;
3802 if(term.numlock && kp->appkey == 2)
3803 continue;
3804
3805 if(IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
3806 continue;
3807
3808 if(IS_SET(MODE_CRLF) ? kp->crlf < 0 : kp->crlf > 0)
3809 continue;
3810
3811 return kp->s;
3812 }
3813
3814 return NULL;
3815 }
3816
3817 void
3818 kpress(XEvent *ev) {
3819 XKeyEvent *e = &ev->xkey;
3820 KeySym ksym;
3821 char buf[32], *customkey;
3822 int len;
3823 long c;
3824 Status status;
3825 Shortcut *bp;
3826
3827 if(IS_SET(MODE_KBDLOCK))
3828 return;
3829
3830 len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
3831 /* 1. shortcuts */
3832 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3833 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3834 bp->func(&(bp->arg));
3835 return;
3836 }
3837 }
3838
3839 /* 2. custom keys from config.h */
3840 if((customkey = kmap(ksym, e->state))) {
3841 ttysend(customkey, strlen(customkey));
3842 return;
3843 }
3844
3845 /* 3. composed string from input method */
3846 if(len == 0)
3847 return;
3848 if(len == 1 && e->state & Mod1Mask) {
3849 if(IS_SET(MODE_8BIT)) {
3850 if(*buf < 0177) {
3851 c = *buf | 0x80;
3852 len = utf8encode(c, buf, UTF_SIZ);
3853 }
3854 } else {
3855 buf[1] = buf[0];
3856 buf[0] = '\033';
3857 len = 2;
3858 }
3859 }
3860 ttysend(buf, len);
3861 }
3862
3863
3864 void
3865 cmessage(XEvent *e) {
3866 /*
3867 * See xembed specs
3868 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3869 */
3870 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3871 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3872 xw.state |= WIN_FOCUSED;
3873 xseturgency(0);
3874 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3875 xw.state &= ~WIN_FOCUSED;
3876 }
3877 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3878 /* Send SIGHUP to shell */
3879 kill(pid, SIGHUP);
3880 exit(EXIT_SUCCESS);
3881 }
3882 }
3883
3884 void
3885 cresize(int width, int height) {
3886 int col, row;
3887
3888 if(width != 0)
3889 xw.w = width;
3890 if(height != 0)
3891 xw.h = height;
3892
3893 col = (xw.w - 2 * borderpx) / xw.cw;
3894 row = (xw.h - 2 * borderpx) / xw.ch;
3895
3896 tresize(col, row);
3897 xresize(col, row);
3898 ttyresize();
3899 }
3900
3901 void
3902 resize(XEvent *e) {
3903 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3904 return;
3905
3906 cresize(e->xconfigure.width, e->xconfigure.height);
3907 }
3908
3909 void
3910 run(void) {
3911 XEvent ev;
3912 int w = xw.w, h = xw.h;
3913 fd_set rfd;
3914 int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3915 struct timespec drawtimeout, *tv = NULL, now, last, lastblink;
3916 long deltatime;
3917
3918 /* Waiting for window mapping */
3919 do {
3920 XNextEvent(xw.dpy, &ev);
3921 if(ev.type == ConfigureNotify) {
3922 w = ev.xconfigure.width;
3923 h = ev.xconfigure.height;
3924 }
3925 } while(ev.type != MapNotify);
3926
3927 ttynew();
3928 cresize(w, h);
3929
3930 clock_gettime(CLOCK_MONOTONIC, &last);
3931 lastblink = last;
3932
3933 for(xev = actionfps;;) {
3934 FD_ZERO(&rfd);
3935 FD_SET(cmdfd, &rfd);
3936 FD_SET(xfd, &rfd);
3937
3938 if(pselect(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv, NULL) < 0) {
3939 if(errno == EINTR)
3940 continue;
3941 die("select failed: %s\n", strerror(errno));
3942 }
3943 if(FD_ISSET(cmdfd, &rfd)) {
3944 ttyread();
3945 if(blinktimeout) {
3946 blinkset = tattrset(ATTR_BLINK);
3947 if(!blinkset)
3948 MODBIT(term.mode, 0, MODE_BLINK);
3949 }
3950 }
3951
3952 if(FD_ISSET(xfd, &rfd))
3953 xev = actionfps;
3954
3955 clock_gettime(CLOCK_MONOTONIC, &now);
3956 drawtimeout.tv_sec = 0;
3957 drawtimeout.tv_nsec = (1000/xfps) * 1E6;
3958 tv = &drawtimeout;
3959
3960 dodraw = 0;
3961 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
3962 tsetdirtattr(ATTR_BLINK);
3963 term.mode ^= MODE_BLINK;
3964 lastblink = now;
3965 dodraw = 1;
3966 }
3967 deltatime = TIMEDIFF(now, last);
3968 if(deltatime > (xev? (1000/xfps) : (1000/actionfps))
3969 || deltatime < 0) {
3970 dodraw = 1;
3971 last = now;
3972 }
3973
3974 if(dodraw) {
3975 while(XPending(xw.dpy)) {
3976 XNextEvent(xw.dpy, &ev);
3977 if(XFilterEvent(&ev, None))
3978 continue;
3979 if(handler[ev.type])
3980 (handler[ev.type])(&ev);
3981 }
3982
3983 draw();
3984 XFlush(xw.dpy);
3985
3986 if(xev && !FD_ISSET(xfd, &rfd))
3987 xev--;
3988 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
3989 if(blinkset) {
3990 if(TIMEDIFF(now, lastblink) \
3991 > blinktimeout) {
3992 drawtimeout.tv_nsec = 1000;
3993 } else {
3994 drawtimeout.tv_nsec = (1E6 * \
3995 (blinktimeout - \
3996 TIMEDIFF(now,
3997 lastblink)));
3998 }
3999 drawtimeout.tv_sec = \
4000 drawtimeout.tv_nsec / 1E9;
4001 drawtimeout.tv_nsec %= (long)1E9;
4002 } else {
4003 tv = NULL;
4004 }
4005 }
4006 }
4007 }
4008 }
4009
4010 void
4011 usage(void) {
4012 die("%s " VERSION " (c) 2010-2015 st engineers\n" \
4013 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]\n"
4014 " [-i] [-t title] [-w windowid] [-e command ...] [command ...]\n",
4015 argv0);
4016 }
4017
4018 int
4019 main(int argc, char *argv[]) {
4020 uint cols = 80, rows = 24;
4021
4022 xw.l = xw.t = 0;
4023 xw.isfixed = False;
4024 xw.cursor = 0;
4025
4026 ARGBEGIN {
4027 case 'a':
4028 allowaltscreen = false;
4029 break;
4030 case 'c':
4031 opt_class = EARGF(usage());
4032 break;
4033 case 'e':
4034 if(argc > 1)
4035 --argc, ++argv;
4036 goto run;
4037 case 'f':
4038 opt_font = EARGF(usage());
4039 break;
4040 case 'g':
4041 xw.gm = XParseGeometry(EARGF(usage()),
4042 &xw.l, &xw.t, &cols, &rows);
4043 break;
4044 case 'i':
4045 xw.isfixed = True;
4046 break;
4047 case 'o':
4048 opt_io = EARGF(usage());
4049 break;
4050 case 't':
4051 opt_title = EARGF(usage());
4052 break;
4053 case 'w':
4054 opt_embed = EARGF(usage());
4055 break;
4056 case 'v':
4057 default:
4058 usage();
4059 } ARGEND;
4060
4061 run:
4062 if(argc > 0) {
4063 /* eat all remaining arguments */
4064 opt_cmd = argv;
4065 if(!opt_title)
4066 opt_title = basename(xstrdup(argv[0]));
4067 }
4068 setlocale(LC_CTYPE, "");
4069 XSetLocaleModifiers("");
4070 tnew(MAX(cols, 1), MAX(rows, 1));
4071 xinit();
4072 selinit();
4073 run();
4074
4075 return 0;
4076 }
4077