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len assignment is never used
[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 ISDELIM(u) (BETWEEN(u, 0, 127) && strchr(worddelimiters, u) != NULL)
76 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
77 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
78 #define IS_SET(flag) ((term.mode & (flag)) != 0)
79 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_nsec-t2.tv_nsec)/1E6)
80 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
81
82 #define TRUECOLOR(r,g,b) (1 << 24 | (r) << 16 | (g) << 8 | (b))
83 #define IS_TRUECOL(x) (1 << 24 & (x))
84 #define TRUERED(x) (((x) & 0xff0000) >> 8)
85 #define TRUEGREEN(x) (((x) & 0xff00))
86 #define TRUEBLUE(x) (((x) & 0xff) << 8)
87
88
89 enum glyph_attribute {
90 ATTR_NULL = 0,
91 ATTR_BOLD = 1 << 0,
92 ATTR_FAINT = 1 << 1,
93 ATTR_ITALIC = 1 << 2,
94 ATTR_UNDERLINE = 1 << 3,
95 ATTR_BLINK = 1 << 4,
96 ATTR_REVERSE = 1 << 5,
97 ATTR_INVISIBLE = 1 << 6,
98 ATTR_STRUCK = 1 << 7,
99 ATTR_WRAP = 1 << 8,
100 ATTR_WIDE = 1 << 9,
101 ATTR_WDUMMY = 1 << 10,
102 };
103
104 enum cursor_movement {
105 CURSOR_SAVE,
106 CURSOR_LOAD
107 };
108
109 enum cursor_state {
110 CURSOR_DEFAULT = 0,
111 CURSOR_WRAPNEXT = 1,
112 CURSOR_ORIGIN = 2
113 };
114
115 enum term_mode {
116 MODE_WRAP = 1 << 0,
117 MODE_INSERT = 1 << 1,
118 MODE_APPKEYPAD = 1 << 2,
119 MODE_ALTSCREEN = 1 << 3,
120 MODE_CRLF = 1 << 4,
121 MODE_MOUSEBTN = 1 << 5,
122 MODE_MOUSEMOTION = 1 << 6,
123 MODE_REVERSE = 1 << 7,
124 MODE_KBDLOCK = 1 << 8,
125 MODE_HIDE = 1 << 9,
126 MODE_ECHO = 1 << 10,
127 MODE_APPCURSOR = 1 << 11,
128 MODE_MOUSESGR = 1 << 12,
129 MODE_8BIT = 1 << 13,
130 MODE_BLINK = 1 << 14,
131 MODE_FBLINK = 1 << 15,
132 MODE_FOCUS = 1 << 16,
133 MODE_MOUSEX10 = 1 << 17,
134 MODE_MOUSEMANY = 1 << 18,
135 MODE_BRCKTPASTE = 1 << 19,
136 MODE_PRINT = 1 << 20,
137 MODE_MOUSE = MODE_MOUSEBTN|MODE_MOUSEMOTION|MODE_MOUSEX10\
138 |MODE_MOUSEMANY,
139 };
140
141 enum charset {
142 CS_GRAPHIC0,
143 CS_GRAPHIC1,
144 CS_UK,
145 CS_USA,
146 CS_MULTI,
147 CS_GER,
148 CS_FIN
149 };
150
151 enum escape_state {
152 ESC_START = 1,
153 ESC_CSI = 2,
154 ESC_STR = 4, /* DCS, OSC, PM, APC */
155 ESC_ALTCHARSET = 8,
156 ESC_STR_END = 16, /* a final string was encountered */
157 ESC_TEST = 32, /* Enter in test mode */
158 };
159
160 enum window_state {
161 WIN_VISIBLE = 1,
162 WIN_FOCUSED = 2
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 long u; /* character code */
185 ushort mode; /* attribute flags */
186 ushort fg; /* foreground */
187 ushort 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 stty(void);
356 static void sigchld(int);
357 static void run(void);
358
359 static void csidump(void);
360 static void csihandle(void);
361 static void csiparse(void);
362 static void csireset(void);
363 static int eschandle(uchar);
364 static void strdump(void);
365 static void strhandle(void);
366 static void strparse(void);
367 static void strreset(void);
368
369 static int tattrset(int);
370 static void tprinter(char *, size_t);
371 static void tdumpsel(void);
372 static void tdumpline(int);
373 static void tdump(void);
374 static void tclearregion(int, int, int, int);
375 static void tcursor(int);
376 static void tdeletechar(int);
377 static void tdeleteline(int);
378 static void tinsertblank(int);
379 static void tinsertblankline(int);
380 static int tlinelen(int);
381 static void tmoveto(int, int);
382 static void tmoveato(int, int);
383 static void tnew(int, int);
384 static void tnewline(int);
385 static void tputtab(int);
386 static void tputc(long);
387 static void treset(void);
388 static void tresize(int, int);
389 static void tscrollup(int, int);
390 static void tscrolldown(int, int);
391 static void tsetattr(int *, int);
392 static void tsetchar(long, Glyph *, int, int);
393 static void tsetscroll(int, int);
394 static void tswapscreen(void);
395 static void tsetdirt(int, int);
396 static void tsetdirtattr(int);
397 static void tsetmode(bool, bool, int *, int);
398 static void tfulldirt(void);
399 static void techo(long);
400 static void tcontrolcode(uchar );
401 static void tdectest(char );
402 static int32_t tdefcolor(int *, int *, int);
403 static void tdeftran(char);
404 static inline bool match(uint, uint);
405 static void ttynew(void);
406 static void ttyread(void);
407 static void ttyresize(void);
408 static void ttysend(char *, size_t);
409 static void ttywrite(const char *, size_t);
410 static void tstrsequence(uchar);
411
412 static inline ushort sixd_to_16bit(int);
413 static void xdraws(char *, Glyph, int, int, int, int);
414 static void xdrawglyph(Glyph, int, int);
415 static void xhints(void);
416 static void xclear(int, int, int, int);
417 static void xdrawcursor(void);
418 static void xinit(void);
419 static void xloadcols(void);
420 static int xsetcolorname(int, const char *);
421 static int xgeommasktogravity(int);
422 static int xloadfont(Font *, FcPattern *);
423 static void xloadfonts(char *, double);
424 static void xsettitle(char *);
425 static void xresettitle(void);
426 static void xsetpointermotion(int);
427 static void xseturgency(int);
428 static void xsetsel(char *, Time);
429 static void xtermclear(int, int, int, int);
430 static void xunloadfont(Font *);
431 static void xunloadfonts(void);
432 static void xresize(int, int);
433
434 static void expose(XEvent *);
435 static void visibility(XEvent *);
436 static void unmap(XEvent *);
437 static char *kmap(KeySym, uint);
438 static void kpress(XEvent *);
439 static void cmessage(XEvent *);
440 static void cresize(int, int);
441 static void resize(XEvent *);
442 static void focus(XEvent *);
443 static void brelease(XEvent *);
444 static void bpress(XEvent *);
445 static void bmotion(XEvent *);
446 static void selnotify(XEvent *);
447 static void selclear(XEvent *);
448 static void selrequest(XEvent *);
449
450 static void selinit(void);
451 static void selnormalize(void);
452 static inline bool selected(int, int);
453 static char *getsel(void);
454 static void selcopy(Time);
455 static void selscroll(int, int);
456 static void selsnap(int, int *, int *, int);
457 static int x2col(int);
458 static int y2row(int);
459 static void getbuttoninfo(XEvent *);
460 static void mousereport(XEvent *);
461
462 static size_t utf8decode(char *, long *, size_t);
463 static long utf8decodebyte(char, size_t *);
464 static size_t utf8encode(long, char *);
465 static char utf8encodebyte(long, size_t);
466 static size_t utf8validate(long *, size_t);
467
468 static ssize_t xwrite(int, const char *, size_t);
469 static void *xmalloc(size_t);
470 static void *xrealloc(void *, size_t);
471 static char *xstrdup(char *);
472
473 static void usage(void);
474
475 static void (*handler[LASTEvent])(XEvent *) = {
476 [KeyPress] = kpress,
477 [ClientMessage] = cmessage,
478 [ConfigureNotify] = resize,
479 [VisibilityNotify] = visibility,
480 [UnmapNotify] = unmap,
481 [Expose] = expose,
482 [FocusIn] = focus,
483 [FocusOut] = focus,
484 [MotionNotify] = bmotion,
485 [ButtonPress] = bpress,
486 [ButtonRelease] = brelease,
487 /*
488 * Uncomment if you want the selection to disappear when you select something
489 * different in another window.
490 */
491 /* [SelectionClear] = selclear, */
492 [SelectionNotify] = selnotify,
493 [SelectionRequest] = selrequest,
494 };
495
496 /* Globals */
497 static DC dc;
498 static XWindow xw;
499 static Term term;
500 static CSIEscape csiescseq;
501 static STREscape strescseq;
502 static int cmdfd;
503 static pid_t pid;
504 static Selection sel;
505 static int iofd = STDOUT_FILENO;
506 static char **opt_cmd = NULL;
507 static char *opt_io = NULL;
508 static char *opt_title = NULL;
509 static char *opt_embed = NULL;
510 static char *opt_class = NULL;
511 static char *opt_font = NULL;
512 static char *opt_line = NULL;
513 static int oldbutton = 3; /* button event on startup: 3 = release */
514
515 static char *usedfont = NULL;
516 static double usedfontsize = 0;
517 static double defaultfontsize = 0;
518
519 static uchar utfbyte[UTF_SIZ + 1] = {0x80, 0, 0xC0, 0xE0, 0xF0};
520 static uchar utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
521 static long utfmin[UTF_SIZ + 1] = { 0, 0, 0x80, 0x800, 0x10000};
522 static long utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
523
524 /* Font Ring Cache */
525 enum {
526 FRC_NORMAL,
527 FRC_ITALIC,
528 FRC_BOLD,
529 FRC_ITALICBOLD
530 };
531
532 typedef struct {
533 XftFont *font;
534 int flags;
535 long unicodep;
536 } Fontcache;
537
538 /* Fontcache is an array now. A new font will be appended to the array. */
539 static Fontcache frc[16];
540 static int frclen = 0;
541
542 ssize_t
543 xwrite(int fd, const char *s, size_t len) {
544 size_t aux = len;
545
546 while(len > 0) {
547 ssize_t r = write(fd, s, len);
548 if(r < 0)
549 return r;
550 len -= r;
551 s += r;
552 }
553 return aux;
554 }
555
556 void *
557 xmalloc(size_t len) {
558 void *p = malloc(len);
559
560 if(!p)
561 die("Out of memory\n");
562
563 return p;
564 }
565
566 void *
567 xrealloc(void *p, size_t len) {
568 if((p = realloc(p, len)) == NULL)
569 die("Out of memory\n");
570
571 return p;
572 }
573
574 char *
575 xstrdup(char *s) {
576 if((s = strdup(s)) == NULL)
577 die("Out of memory\n");
578
579 return s;
580 }
581
582 size_t
583 utf8decode(char *c, long *u, size_t clen) {
584 size_t i, j, len, type;
585 long udecoded;
586
587 *u = UTF_INVALID;
588 if(!clen)
589 return 0;
590 udecoded = utf8decodebyte(c[0], &len);
591 if(!BETWEEN(len, 1, UTF_SIZ))
592 return 1;
593 for(i = 1, j = 1; i < clen && j < len; ++i, ++j) {
594 udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
595 if(type != 0)
596 return j;
597 }
598 if(j < len)
599 return 0;
600 *u = udecoded;
601 utf8validate(u, len);
602 return len;
603 }
604
605 long
606 utf8decodebyte(char c, size_t *i) {
607 for(*i = 0; *i < LEN(utfmask); ++(*i))
608 if(((uchar)c & utfmask[*i]) == utfbyte[*i])
609 return (uchar)c & ~utfmask[*i];
610 return 0;
611 }
612
613 size_t
614 utf8encode(long u, char *c) {
615 size_t len, i;
616
617 len = utf8validate(&u, 0);
618 if(len > UTF_SIZ)
619 return 0;
620 for(i = len - 1; i != 0; --i) {
621 c[i] = utf8encodebyte(u, 0);
622 u >>= 6;
623 }
624 c[0] = utf8encodebyte(u, len);
625 return len;
626 }
627
628 char
629 utf8encodebyte(long u, size_t i) {
630 return utfbyte[i] | (u & ~utfmask[i]);
631 }
632
633 size_t
634 utf8validate(long *u, size_t i) {
635 if(!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF))
636 *u = UTF_INVALID;
637 for(i = 1; *u > utfmax[i]; ++i)
638 ;
639 return i;
640 }
641
642 void
643 selinit(void) {
644 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
645 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
646 sel.mode = 0;
647 sel.ob.x = -1;
648 sel.primary = NULL;
649 sel.clipboard = NULL;
650 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
651 if(sel.xtarget == None)
652 sel.xtarget = XA_STRING;
653 }
654
655 int
656 x2col(int x) {
657 x -= borderpx;
658 x /= xw.cw;
659
660 return LIMIT(x, 0, term.col-1);
661 }
662
663 int
664 y2row(int y) {
665 y -= borderpx;
666 y /= xw.ch;
667
668 return LIMIT(y, 0, term.row-1);
669 }
670
671 int
672 tlinelen(int y) {
673 int i = term.col;
674
675 if(term.line[y][i - 1].mode & ATTR_WRAP)
676 return i;
677
678 while(i > 0 && term.line[y][i - 1].u == ' ')
679 --i;
680
681 return i;
682 }
683
684 void
685 selnormalize(void) {
686 int i;
687
688 if(sel.ob.y == sel.oe.y || sel.type == SEL_RECTANGULAR) {
689 sel.nb.x = MIN(sel.ob.x, sel.oe.x);
690 sel.ne.x = MAX(sel.ob.x, sel.oe.x);
691 } else {
692 sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
693 sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
694 }
695 sel.nb.y = MIN(sel.ob.y, sel.oe.y);
696 sel.ne.y = MAX(sel.ob.y, sel.oe.y);
697
698 selsnap(sel.snap, &sel.nb.x, &sel.nb.y, -1);
699 selsnap(sel.snap, &sel.ne.x, &sel.ne.y, +1);
700
701 /* expand selection over line breaks */
702 if (sel.type == SEL_RECTANGULAR)
703 return;
704 i = tlinelen(sel.nb.y);
705 if (i < sel.nb.x)
706 sel.nb.x = i;
707 if (tlinelen(sel.ne.y) <= sel.ne.x)
708 sel.ne.x = term.col - 1;
709 }
710
711 bool
712 selected(int x, int y) {
713 if(sel.type == SEL_RECTANGULAR)
714 return BETWEEN(y, sel.nb.y, sel.ne.y)
715 && BETWEEN(x, sel.nb.x, sel.ne.x);
716
717 return BETWEEN(y, sel.nb.y, sel.ne.y)
718 && (y != sel.nb.y || x >= sel.nb.x)
719 && (y != sel.ne.y || x <= sel.ne.x);
720 }
721
722 void
723 selsnap(int mode, int *x, int *y, int direction) {
724 int newx, newy, xt, yt;
725 bool delim, prevdelim;
726 Glyph *gp, *prevgp;
727
728 switch(mode) {
729 case SNAP_WORD:
730 /*
731 * Snap around if the word wraps around at the end or
732 * beginning of a line.
733 */
734 prevgp = &term.line[*y][*x];
735 prevdelim = ISDELIM(prevgp->u);
736 for(;;) {
737 newx = *x + direction;
738 newy = *y;
739 if(!BETWEEN(newx, 0, term.col - 1)) {
740 newy += direction;
741 newx = (newx + term.col) % term.col;
742 if (!BETWEEN(newy, 0, term.row - 1))
743 break;
744
745 if(direction > 0)
746 yt = *y, xt = *x;
747 else
748 yt = newy, xt = newx;
749 if(!(term.line[yt][xt].mode & ATTR_WRAP))
750 break;
751 }
752
753 if (newx >= tlinelen(newy))
754 break;
755
756 gp = &term.line[newy][newx];
757 delim = ISDELIM(gp->u);
758 if(!(gp->mode & ATTR_WDUMMY) && (delim != prevdelim
759 || (delim && gp->u != prevgp->u)))
760 break;
761
762 *x = newx;
763 *y = newy;
764 prevgp = gp;
765 prevdelim = delim;
766 }
767 break;
768 case SNAP_LINE:
769 /*
770 * Snap around if the the previous line or the current one
771 * has set ATTR_WRAP at its end. Then the whole next or
772 * previous line will be selected.
773 */
774 *x = (direction < 0) ? 0 : term.col - 1;
775 if(direction < 0 && *y > 0) {
776 for(; *y > 0; *y += direction) {
777 if(!(term.line[*y-1][term.col-1].mode
778 & ATTR_WRAP)) {
779 break;
780 }
781 }
782 } else if(direction > 0 && *y < term.row-1) {
783 for(; *y < term.row; *y += direction) {
784 if(!(term.line[*y][term.col-1].mode
785 & ATTR_WRAP)) {
786 break;
787 }
788 }
789 }
790 break;
791 }
792 }
793
794 void
795 getbuttoninfo(XEvent *e) {
796 int type;
797 uint state = e->xbutton.state & ~(Button1Mask | forceselmod);
798
799 sel.alt = IS_SET(MODE_ALTSCREEN);
800
801 sel.oe.x = x2col(e->xbutton.x);
802 sel.oe.y = y2row(e->xbutton.y);
803 selnormalize();
804
805 sel.type = SEL_REGULAR;
806 for(type = 1; type < LEN(selmasks); ++type) {
807 if(match(selmasks[type], state)) {
808 sel.type = type;
809 break;
810 }
811 }
812 }
813
814 void
815 mousereport(XEvent *e) {
816 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
817 button = e->xbutton.button, state = e->xbutton.state,
818 len;
819 char buf[40];
820 static int ox, oy;
821
822 /* from urxvt */
823 if(e->xbutton.type == MotionNotify) {
824 if(x == ox && y == oy)
825 return;
826 if(!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
827 return;
828 /* MOUSE_MOTION: no reporting if no button is pressed */
829 if(IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
830 return;
831
832 button = oldbutton + 32;
833 ox = x;
834 oy = y;
835 } else {
836 if(!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
837 button = 3;
838 } else {
839 button -= Button1;
840 if(button >= 3)
841 button += 64 - 3;
842 }
843 if(e->xbutton.type == ButtonPress) {
844 oldbutton = button;
845 ox = x;
846 oy = y;
847 } else if(e->xbutton.type == ButtonRelease) {
848 oldbutton = 3;
849 /* MODE_MOUSEX10: no button release reporting */
850 if(IS_SET(MODE_MOUSEX10))
851 return;
852 if (button == 64 || button == 65)
853 return;
854 }
855 }
856
857 if(!IS_SET(MODE_MOUSEX10)) {
858 button += ((state & ShiftMask ) ? 4 : 0)
859 + ((state & Mod4Mask ) ? 8 : 0)
860 + ((state & ControlMask) ? 16 : 0);
861 }
862
863 if(IS_SET(MODE_MOUSESGR)) {
864 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
865 button, x+1, y+1,
866 e->xbutton.type == ButtonRelease ? 'm' : 'M');
867 } else if(x < 223 && y < 223) {
868 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
869 32+button, 32+x+1, 32+y+1);
870 } else {
871 return;
872 }
873
874 ttywrite(buf, len);
875 }
876
877 void
878 bpress(XEvent *e) {
879 struct timespec now;
880 Mousekey *mk;
881
882 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
883 mousereport(e);
884 return;
885 }
886
887 for(mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
888 if(e->xbutton.button == mk->b
889 && match(mk->mask, e->xbutton.state)) {
890 ttysend(mk->s, strlen(mk->s));
891 return;
892 }
893 }
894
895 if(e->xbutton.button == Button1) {
896 clock_gettime(CLOCK_MONOTONIC, &now);
897
898 /* Clear previous selection, logically and visually. */
899 selclear(NULL);
900 sel.mode = 1;
901 sel.type = SEL_REGULAR;
902 sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
903 sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
904
905 /*
906 * If the user clicks below predefined timeouts specific
907 * snapping behaviour is exposed.
908 */
909 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
910 sel.snap = SNAP_LINE;
911 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
912 sel.snap = SNAP_WORD;
913 } else {
914 sel.snap = 0;
915 }
916 selnormalize();
917
918 /*
919 * Draw selection, unless it's regular and we don't want to
920 * make clicks visible
921 */
922 if(sel.snap != 0) {
923 sel.mode++;
924 tsetdirt(sel.nb.y, sel.ne.y);
925 }
926 sel.tclick2 = sel.tclick1;
927 sel.tclick1 = now;
928 }
929 }
930
931 char *
932 getsel(void) {
933 char *str, *ptr;
934 int y, bufsize, lastx, linelen;
935 Glyph *gp, *last;
936
937 if(sel.ob.x == -1)
938 return NULL;
939
940 bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
941 ptr = str = xmalloc(bufsize);
942
943 /* append every set & selected glyph to the selection */
944 for(y = sel.nb.y; y <= sel.ne.y; y++) {
945 linelen = tlinelen(y);
946
947 if(sel.type == SEL_RECTANGULAR) {
948 gp = &term.line[y][sel.nb.x];
949 lastx = sel.ne.x;
950 } else {
951 gp = &term.line[y][sel.nb.y == y ? sel.nb.x : 0];
952 lastx = (sel.ne.y == y) ? sel.ne.x : term.col-1;
953 }
954 last = &term.line[y][MIN(lastx, linelen-1)];
955 while(last >= gp && last->u == ' ')
956 --last;
957
958 for( ; gp <= last; ++gp) {
959 if(gp->mode & ATTR_WDUMMY)
960 continue;
961
962 ptr += utf8encode(gp->u, ptr);
963 }
964
965 /*
966 * Copy and pasting of line endings is inconsistent
967 * in the inconsistent terminal and GUI world.
968 * The best solution seems like to produce '\n' when
969 * something is copied from st and convert '\n' to
970 * '\r', when something to be pasted is received by
971 * st.
972 * FIXME: Fix the computer world.
973 */
974 if((y < sel.ne.y || lastx >= linelen) && !(last->mode & ATTR_WRAP))
975 *ptr++ = '\n';
976 }
977 *ptr = 0;
978 return str;
979 }
980
981 void
982 selcopy(Time t) {
983 xsetsel(getsel(), t);
984 }
985
986 void
987 selnotify(XEvent *e) {
988 ulong nitems, ofs, rem;
989 int format;
990 uchar *data, *last, *repl;
991 Atom type;
992 XSelectionEvent *xsev;
993
994 ofs = 0;
995 xsev = &e->xselection;
996 if (xsev->property == None)
997 return;
998 do {
999 if(XGetWindowProperty(xw.dpy, xw.win, xsev->property, ofs,
1000 BUFSIZ/4, False, AnyPropertyType,
1001 &type, &format, &nitems, &rem,
1002 &data)) {
1003 fprintf(stderr, "Clipboard allocation failed\n");
1004 return;
1005 }
1006
1007 /*
1008 * As seen in getsel:
1009 * Line endings are inconsistent in the terminal and GUI world
1010 * copy and pasting. When receiving some selection data,
1011 * replace all '\n' with '\r'.
1012 * FIXME: Fix the computer world.
1013 */
1014 repl = data;
1015 last = data + nitems * format / 8;
1016 while((repl = memchr(repl, '\n', last - repl))) {
1017 *repl++ = '\r';
1018 }
1019
1020 if(IS_SET(MODE_BRCKTPASTE))
1021 ttywrite("\033[200~", 6);
1022 ttysend((char *)data, nitems * format / 8);
1023 if(IS_SET(MODE_BRCKTPASTE))
1024 ttywrite("\033[201~", 6);
1025 XFree(data);
1026 /* number of 32-bit chunks returned */
1027 ofs += nitems * format / 32;
1028 } while(rem > 0);
1029 }
1030
1031 void
1032 selpaste(const Arg *dummy) {
1033 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
1034 xw.win, CurrentTime);
1035 }
1036
1037 void
1038 clipcopy(const Arg *dummy) {
1039 Atom clipboard;
1040
1041 if(sel.clipboard != NULL)
1042 free(sel.clipboard);
1043
1044 if(sel.primary != NULL) {
1045 sel.clipboard = xstrdup(sel.primary);
1046 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1047 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
1048 }
1049 }
1050
1051 void
1052 clippaste(const Arg *dummy) {
1053 Atom clipboard;
1054
1055 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1056 XConvertSelection(xw.dpy, clipboard, sel.xtarget, clipboard,
1057 xw.win, CurrentTime);
1058 }
1059
1060 void
1061 selclear(XEvent *e) {
1062 if(sel.ob.x == -1)
1063 return;
1064 sel.ob.x = -1;
1065 tsetdirt(sel.nb.y, sel.ne.y);
1066 }
1067
1068 void
1069 selrequest(XEvent *e) {
1070 XSelectionRequestEvent *xsre;
1071 XSelectionEvent xev;
1072 Atom xa_targets, string, clipboard;
1073 char *seltext;
1074
1075 xsre = (XSelectionRequestEvent *) e;
1076 xev.type = SelectionNotify;
1077 xev.requestor = xsre->requestor;
1078 xev.selection = xsre->selection;
1079 xev.target = xsre->target;
1080 xev.time = xsre->time;
1081 if (xsre->property == None)
1082 xsre->property = xsre->target;
1083
1084 /* reject */
1085 xev.property = None;
1086
1087 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
1088 if(xsre->target == xa_targets) {
1089 /* respond with the supported type */
1090 string = sel.xtarget;
1091 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1092 XA_ATOM, 32, PropModeReplace,
1093 (uchar *) &string, 1);
1094 xev.property = xsre->property;
1095 } else if(xsre->target == sel.xtarget || xsre->target == XA_STRING) {
1096 /*
1097 * xith XA_STRING non ascii characters may be incorrect in the
1098 * requestor. It is not our problem, use utf8.
1099 */
1100 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1101 if(xsre->selection == XA_PRIMARY) {
1102 seltext = sel.primary;
1103 } else if(xsre->selection == clipboard) {
1104 seltext = sel.clipboard;
1105 } else {
1106 fprintf(stderr,
1107 "Unhandled clipboard selection 0x%lx\n",
1108 xsre->selection);
1109 return;
1110 }
1111 if(seltext != NULL) {
1112 XChangeProperty(xsre->display, xsre->requestor,
1113 xsre->property, xsre->target,
1114 8, PropModeReplace,
1115 (uchar *)seltext, strlen(seltext));
1116 xev.property = xsre->property;
1117 }
1118 }
1119
1120 /* all done, send a notification to the listener */
1121 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
1122 fprintf(stderr, "Error sending SelectionNotify event\n");
1123 }
1124
1125 void
1126 xsetsel(char *str, Time t) {
1127 free(sel.primary);
1128 sel.primary = str;
1129
1130 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, t);
1131 if (XGetSelectionOwner(xw.dpy, XA_PRIMARY) != xw.win)
1132 selclear(0);
1133 }
1134
1135 void
1136 brelease(XEvent *e) {
1137 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1138 mousereport(e);
1139 return;
1140 }
1141
1142 if(e->xbutton.button == Button2) {
1143 selpaste(NULL);
1144 } else if(e->xbutton.button == Button1) {
1145 if(sel.mode < 2) {
1146 selclear(NULL);
1147 } else {
1148 getbuttoninfo(e);
1149 selcopy(e->xbutton.time);
1150 }
1151 sel.mode = 0;
1152 tsetdirt(sel.nb.y, sel.ne.y);
1153 }
1154 }
1155
1156 void
1157 bmotion(XEvent *e) {
1158 int oldey, oldex, oldsby, oldsey;
1159
1160 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1161 mousereport(e);
1162 return;
1163 }
1164
1165 if(!sel.mode)
1166 return;
1167
1168 sel.mode++;
1169 oldey = sel.oe.y;
1170 oldex = sel.oe.x;
1171 oldsby = sel.nb.y;
1172 oldsey = sel.ne.y;
1173 getbuttoninfo(e);
1174
1175 if(oldey != sel.oe.y || oldex != sel.oe.x)
1176 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
1177 }
1178
1179 void
1180 die(const char *errstr, ...) {
1181 va_list ap;
1182
1183 va_start(ap, errstr);
1184 vfprintf(stderr, errstr, ap);
1185 va_end(ap);
1186 exit(EXIT_FAILURE);
1187 }
1188
1189 void
1190 execsh(void) {
1191 char **args, *sh, *prog;
1192 const struct passwd *pw;
1193 char buf[sizeof(long) * 8 + 1];
1194
1195 errno = 0;
1196 if((pw = getpwuid(getuid())) == NULL) {
1197 if(errno)
1198 die("getpwuid:%s\n", strerror(errno));
1199 else
1200 die("who are you?\n");
1201 }
1202
1203 if (!(sh = getenv("SHELL"))) {
1204 sh = (pw->pw_shell[0]) ? pw->pw_shell : shell;
1205 }
1206
1207 if(opt_cmd)
1208 prog = opt_cmd[0];
1209 else if(utmp)
1210 prog = utmp;
1211 else
1212 prog = sh;
1213 args = (opt_cmd) ? opt_cmd : (char *[]) {prog, NULL};
1214
1215 snprintf(buf, sizeof(buf), "%lu", xw.win);
1216
1217 unsetenv("COLUMNS");
1218 unsetenv("LINES");
1219 unsetenv("TERMCAP");
1220 setenv("LOGNAME", pw->pw_name, 1);
1221 setenv("USER", pw->pw_name, 1);
1222 setenv("SHELL", sh, 1);
1223 setenv("HOME", pw->pw_dir, 1);
1224 setenv("TERM", termname, 1);
1225 setenv("WINDOWID", buf, 1);
1226
1227 signal(SIGCHLD, SIG_DFL);
1228 signal(SIGHUP, SIG_DFL);
1229 signal(SIGINT, SIG_DFL);
1230 signal(SIGQUIT, SIG_DFL);
1231 signal(SIGTERM, SIG_DFL);
1232 signal(SIGALRM, SIG_DFL);
1233
1234 execvp(prog, args);
1235 _exit(EXIT_FAILURE);
1236 }
1237
1238 void
1239 sigchld(int a) {
1240 int stat, ret;
1241
1242 if(waitpid(pid, &stat, 0) < 0)
1243 die("Waiting for pid %hd failed: %s\n", pid, strerror(errno));
1244
1245 ret = WIFEXITED(stat) ? WEXITSTATUS(stat) : EXIT_FAILURE;
1246 if (ret != EXIT_SUCCESS)
1247 die("child finished with error '%d'\n", stat);
1248 exit(EXIT_SUCCESS);
1249 }
1250
1251
1252 void
1253 stty(void)
1254 {
1255 char cmd[_POSIX_ARG_MAX], **p, *q, *s;
1256 size_t n, siz;
1257
1258 if((n = strlen(stty_args)) > sizeof(cmd)-1)
1259 die("incorrect stty parameters\n");
1260 memcpy(cmd, stty_args, n);
1261 q = cmd + n;
1262 siz = sizeof(cmd) - n;
1263 for(p = opt_cmd; p && (s = *p); ++p) {
1264 if((n = strlen(s)) > siz-1)
1265 die("stty parameter length too long\n");
1266 *q++ = ' ';
1267 q = memcpy(q, s, n);
1268 q += n;
1269 siz-= n + 1;
1270 }
1271 *q = '\0';
1272 if (system(cmd) != 0)
1273 perror("Couldn't call stty");
1274 }
1275
1276 void
1277 ttynew(void) {
1278 int m, s;
1279 struct winsize w = {term.row, term.col, 0, 0};
1280
1281 if(opt_io) {
1282 term.mode |= MODE_PRINT;
1283 iofd = (!strcmp(opt_io, "-")) ?
1284 STDOUT_FILENO :
1285 open(opt_io, O_WRONLY | O_CREAT, 0666);
1286 if(iofd < 0) {
1287 fprintf(stderr, "Error opening %s:%s\n",
1288 opt_io, strerror(errno));
1289 }
1290 }
1291
1292 if (opt_line) {
1293 if((cmdfd = open(opt_line, O_RDWR)) < 0)
1294 die("open line failed: %s\n", strerror(errno));
1295 close(STDIN_FILENO);
1296 dup(cmdfd);
1297 stty();
1298 return;
1299 }
1300
1301 /* seems to work fine on linux, openbsd and freebsd */
1302 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1303 die("openpty failed: %s\n", strerror(errno));
1304
1305 switch(pid = fork()) {
1306 case -1:
1307 die("fork failed\n");
1308 break;
1309 case 0:
1310 close(iofd);
1311 setsid(); /* create a new process group */
1312 dup2(s, STDIN_FILENO);
1313 dup2(s, STDOUT_FILENO);
1314 dup2(s, STDERR_FILENO);
1315 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1316 die("ioctl TIOCSCTTY failed: %s\n", strerror(errno));
1317 close(s);
1318 close(m);
1319 execsh();
1320 break;
1321 default:
1322 close(s);
1323 cmdfd = m;
1324 signal(SIGCHLD, sigchld);
1325 break;
1326 }
1327 }
1328
1329 void
1330 ttyread(void) {
1331 static char buf[BUFSIZ];
1332 static int buflen = 0;
1333 char *ptr;
1334 int charsize; /* size of utf8 char in bytes */
1335 long unicodep;
1336 int ret;
1337
1338 /* append read bytes to unprocessed bytes */
1339 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1340 die("Couldn't read from shell: %s\n", strerror(errno));
1341
1342 /* process every complete utf8 char */
1343 buflen += ret;
1344 ptr = buf;
1345 while((charsize = utf8decode(ptr, &unicodep, buflen))) {
1346 tputc(unicodep);
1347 ptr += charsize;
1348 buflen -= charsize;
1349 }
1350
1351 /* keep any uncomplete utf8 char for the next call */
1352 memmove(buf, ptr, buflen);
1353 }
1354
1355 void
1356 ttywrite(const char *s, size_t n) {
1357 if(xwrite(cmdfd, s, n) == -1)
1358 die("write error on tty: %s\n", strerror(errno));
1359 }
1360
1361 void
1362 ttysend(char *s, size_t n) {
1363 int len;
1364 long u;
1365
1366 ttywrite(s, n);
1367 if(IS_SET(MODE_ECHO))
1368 while((len = utf8decode(s, &u, n)) > 0) {
1369 techo(u);
1370 n -= len;
1371 s += len;
1372 }
1373 }
1374
1375 void
1376 ttyresize(void) {
1377 struct winsize w;
1378
1379 w.ws_row = term.row;
1380 w.ws_col = term.col;
1381 w.ws_xpixel = xw.tw;
1382 w.ws_ypixel = xw.th;
1383 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1384 fprintf(stderr, "Couldn't set window size: %s\n", strerror(errno));
1385 }
1386
1387 int
1388 tattrset(int attr) {
1389 int i, j;
1390
1391 for(i = 0; i < term.row-1; i++) {
1392 for(j = 0; j < term.col-1; j++) {
1393 if(term.line[i][j].mode & attr)
1394 return 1;
1395 }
1396 }
1397
1398 return 0;
1399 }
1400
1401 void
1402 tsetdirt(int top, int bot) {
1403 int i;
1404
1405 LIMIT(top, 0, term.row-1);
1406 LIMIT(bot, 0, term.row-1);
1407
1408 for(i = top; i <= bot; i++)
1409 term.dirty[i] = 1;
1410 }
1411
1412 void
1413 tsetdirtattr(int attr) {
1414 int i, j;
1415
1416 for(i = 0; i < term.row-1; i++) {
1417 for(j = 0; j < term.col-1; j++) {
1418 if(term.line[i][j].mode & attr) {
1419 tsetdirt(i, i);
1420 break;
1421 }
1422 }
1423 }
1424 }
1425
1426 void
1427 tfulldirt(void) {
1428 tsetdirt(0, term.row-1);
1429 }
1430
1431 void
1432 tcursor(int mode) {
1433 static TCursor c[2];
1434 bool alt = IS_SET(MODE_ALTSCREEN);
1435
1436 if(mode == CURSOR_SAVE) {
1437 c[alt] = term.c;
1438 } else if(mode == CURSOR_LOAD) {
1439 term.c = c[alt];
1440 tmoveto(c[alt].x, c[alt].y);
1441 }
1442 }
1443
1444 void
1445 treset(void) {
1446 uint i;
1447
1448 term.c = (TCursor){{
1449 .mode = ATTR_NULL,
1450 .fg = defaultfg,
1451 .bg = defaultbg
1452 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1453
1454 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1455 for(i = tabspaces; i < term.col; i += tabspaces)
1456 term.tabs[i] = 1;
1457 term.top = 0;
1458 term.bot = term.row - 1;
1459 term.mode = MODE_WRAP;
1460 memset(term.trantbl, CS_USA, sizeof(term.trantbl));
1461 term.charset = 0;
1462
1463 for(i = 0; i < 2; i++) {
1464 tmoveto(0, 0);
1465 tcursor(CURSOR_SAVE);
1466 tclearregion(0, 0, term.col-1, term.row-1);
1467 tswapscreen();
1468 }
1469 }
1470
1471 void
1472 tnew(int col, int row) {
1473 term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } };
1474 tresize(col, row);
1475 term.numlock = 1;
1476
1477 treset();
1478 }
1479
1480 void
1481 tswapscreen(void) {
1482 Line *tmp = term.line;
1483
1484 term.line = term.alt;
1485 term.alt = tmp;
1486 term.mode ^= MODE_ALTSCREEN;
1487 tfulldirt();
1488 }
1489
1490 void
1491 tscrolldown(int orig, int n) {
1492 int i;
1493 Line temp;
1494
1495 LIMIT(n, 0, term.bot-orig+1);
1496
1497 tsetdirt(orig, term.bot-n);
1498 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1499
1500 for(i = term.bot; i >= orig+n; i--) {
1501 temp = term.line[i];
1502 term.line[i] = term.line[i-n];
1503 term.line[i-n] = temp;
1504 }
1505
1506 selscroll(orig, n);
1507 }
1508
1509 void
1510 tscrollup(int orig, int n) {
1511 int i;
1512 Line temp;
1513
1514 LIMIT(n, 0, term.bot-orig+1);
1515
1516 tclearregion(0, orig, term.col-1, orig+n-1);
1517 tsetdirt(orig+n, term.bot);
1518
1519 for(i = orig; i <= term.bot-n; i++) {
1520 temp = term.line[i];
1521 term.line[i] = term.line[i+n];
1522 term.line[i+n] = temp;
1523 }
1524
1525 selscroll(orig, -n);
1526 }
1527
1528 void
1529 selscroll(int orig, int n) {
1530 if(sel.ob.x == -1)
1531 return;
1532
1533 if(BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
1534 if((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
1535 selclear(NULL);
1536 return;
1537 }
1538 if(sel.type == SEL_RECTANGULAR) {
1539 if(sel.ob.y < term.top)
1540 sel.ob.y = term.top;
1541 if(sel.oe.y > term.bot)
1542 sel.oe.y = term.bot;
1543 } else {
1544 if(sel.ob.y < term.top) {
1545 sel.ob.y = term.top;
1546 sel.ob.x = 0;
1547 }
1548 if(sel.oe.y > term.bot) {
1549 sel.oe.y = term.bot;
1550 sel.oe.x = term.col;
1551 }
1552 }
1553 selnormalize();
1554 }
1555 }
1556
1557 void
1558 tnewline(int first_col) {
1559 int y = term.c.y;
1560
1561 if(y == term.bot) {
1562 tscrollup(term.top, 1);
1563 } else {
1564 y++;
1565 }
1566 tmoveto(first_col ? 0 : term.c.x, y);
1567 }
1568
1569 void
1570 csiparse(void) {
1571 char *p = csiescseq.buf, *np;
1572 long int v;
1573
1574 csiescseq.narg = 0;
1575 if(*p == '?') {
1576 csiescseq.priv = 1;
1577 p++;
1578 }
1579
1580 csiescseq.buf[csiescseq.len] = '\0';
1581 while(p < csiescseq.buf+csiescseq.len) {
1582 np = NULL;
1583 v = strtol(p, &np, 10);
1584 if(np == p)
1585 v = 0;
1586 if(v == LONG_MAX || v == LONG_MIN)
1587 v = -1;
1588 csiescseq.arg[csiescseq.narg++] = v;
1589 p = np;
1590 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1591 break;
1592 p++;
1593 }
1594 csiescseq.mode[0] = *p++;
1595 csiescseq.mode[1] = (p < csiescseq.buf+csiescseq.len) ? *p : '\0';
1596 }
1597
1598 /* for absolute user moves, when decom is set */
1599 void
1600 tmoveato(int x, int y) {
1601 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1602 }
1603
1604 void
1605 tmoveto(int x, int y) {
1606 int miny, maxy;
1607
1608 if(term.c.state & CURSOR_ORIGIN) {
1609 miny = term.top;
1610 maxy = term.bot;
1611 } else {
1612 miny = 0;
1613 maxy = term.row - 1;
1614 }
1615 term.c.state &= ~CURSOR_WRAPNEXT;
1616 term.c.x = LIMIT(x, 0, term.col-1);
1617 term.c.y = LIMIT(y, miny, maxy);
1618 }
1619
1620 void
1621 tsetchar(long u, Glyph *attr, int x, int y) {
1622 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1623 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1624 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1625 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1626 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1627 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1628 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1629 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1630 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1631 };
1632
1633 /*
1634 * The table is proudly stolen from rxvt.
1635 */
1636 if(term.trantbl[term.charset] == CS_GRAPHIC0 &&
1637 BETWEEN(u, 0x41, 0x7e) && vt100_0[u - 0x41])
1638 utf8decode(vt100_0[u - 0x41], &u, UTF_SIZ);
1639
1640 if(term.line[y][x].mode & ATTR_WIDE) {
1641 if(x+1 < term.col) {
1642 term.line[y][x+1].u = ' ';
1643 term.line[y][x+1].mode &= ~ATTR_WDUMMY;
1644 }
1645 } else if(term.line[y][x].mode & ATTR_WDUMMY) {
1646 term.line[y][x-1].u = ' ';
1647 term.line[y][x-1].mode &= ~ATTR_WIDE;
1648 }
1649
1650 term.dirty[y] = 1;
1651 term.line[y][x] = *attr;
1652 term.line[y][x].u = u;
1653 }
1654
1655 void
1656 tclearregion(int x1, int y1, int x2, int y2) {
1657 int x, y, temp;
1658 Glyph *gp;
1659
1660 if(x1 > x2)
1661 temp = x1, x1 = x2, x2 = temp;
1662 if(y1 > y2)
1663 temp = y1, y1 = y2, y2 = temp;
1664
1665 LIMIT(x1, 0, term.col-1);
1666 LIMIT(x2, 0, term.col-1);
1667 LIMIT(y1, 0, term.row-1);
1668 LIMIT(y2, 0, term.row-1);
1669
1670 for(y = y1; y <= y2; y++) {
1671 term.dirty[y] = 1;
1672 for(x = x1; x <= x2; x++) {
1673 gp = &term.line[y][x];
1674 if(selected(x, y))
1675 selclear(NULL);
1676 gp->fg = term.c.attr.fg;
1677 gp->bg = term.c.attr.bg;
1678 gp->mode = 0;
1679 gp->u = ' ';
1680 }
1681 }
1682 }
1683
1684 void
1685 tdeletechar(int n) {
1686 int dst, src, size;
1687 Glyph *line;
1688
1689 LIMIT(n, 0, term.col - term.c.x);
1690
1691 dst = term.c.x;
1692 src = term.c.x + n;
1693 size = term.col - src;
1694 line = term.line[term.c.y];
1695
1696 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1697 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1698 }
1699
1700 void
1701 tinsertblank(int n) {
1702 int dst, src, size;
1703 Glyph *line;
1704
1705 LIMIT(n, 0, term.col - term.c.x);
1706
1707 dst = term.c.x + n;
1708 src = term.c.x;
1709 size = term.col - dst;
1710 line = term.line[term.c.y];
1711
1712 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1713 tclearregion(src, term.c.y, dst - 1, term.c.y);
1714 }
1715
1716 void
1717 tinsertblankline(int n) {
1718 if(BETWEEN(term.c.y, term.top, term.bot))
1719 tscrolldown(term.c.y, n);
1720 }
1721
1722 void
1723 tdeleteline(int n) {
1724 if(BETWEEN(term.c.y, term.top, term.bot))
1725 tscrollup(term.c.y, n);
1726 }
1727
1728 int32_t
1729 tdefcolor(int *attr, int *npar, int l) {
1730 int32_t idx = -1;
1731 uint r, g, b;
1732
1733 switch (attr[*npar + 1]) {
1734 case 2: /* direct color in RGB space */
1735 if (*npar + 4 >= l) {
1736 fprintf(stderr,
1737 "erresc(38): Incorrect number of parameters (%d)\n",
1738 *npar);
1739 break;
1740 }
1741 r = attr[*npar + 2];
1742 g = attr[*npar + 3];
1743 b = attr[*npar + 4];
1744 *npar += 4;
1745 if(!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
1746 fprintf(stderr, "erresc: bad rgb color (%u,%u,%u)\n",
1747 r, g, b);
1748 else
1749 idx = TRUECOLOR(r, g, b);
1750 break;
1751 case 5: /* indexed color */
1752 if (*npar + 2 >= l) {
1753 fprintf(stderr,
1754 "erresc(38): Incorrect number of parameters (%d)\n",
1755 *npar);
1756 break;
1757 }
1758 *npar += 2;
1759 if(!BETWEEN(attr[*npar], 0, 255))
1760 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
1761 else
1762 idx = attr[*npar];
1763 break;
1764 case 0: /* implemented defined (only foreground) */
1765 case 1: /* transparent */
1766 case 3: /* direct color in CMY space */
1767 case 4: /* direct color in CMYK space */
1768 default:
1769 fprintf(stderr,
1770 "erresc(38): gfx attr %d unknown\n", attr[*npar]);
1771 break;
1772 }
1773
1774 return idx;
1775 }
1776
1777 void
1778 tsetattr(int *attr, int l) {
1779 int i;
1780 int32_t idx;
1781
1782 for(i = 0; i < l; i++) {
1783 switch(attr[i]) {
1784 case 0:
1785 term.c.attr.mode &= ~(
1786 ATTR_BOLD |
1787 ATTR_FAINT |
1788 ATTR_ITALIC |
1789 ATTR_UNDERLINE |
1790 ATTR_BLINK |
1791 ATTR_REVERSE |
1792 ATTR_INVISIBLE |
1793 ATTR_STRUCK );
1794 term.c.attr.fg = defaultfg;
1795 term.c.attr.bg = defaultbg;
1796 break;
1797 case 1:
1798 term.c.attr.mode |= ATTR_BOLD;
1799 break;
1800 case 2:
1801 term.c.attr.mode |= ATTR_FAINT;
1802 break;
1803 case 3:
1804 term.c.attr.mode |= ATTR_ITALIC;
1805 break;
1806 case 4:
1807 term.c.attr.mode |= ATTR_UNDERLINE;
1808 break;
1809 case 5: /* slow blink */
1810 /* FALLTHROUGH */
1811 case 6: /* rapid blink */
1812 term.c.attr.mode |= ATTR_BLINK;
1813 break;
1814 case 7:
1815 term.c.attr.mode |= ATTR_REVERSE;
1816 break;
1817 case 8:
1818 term.c.attr.mode |= ATTR_INVISIBLE;
1819 break;
1820 case 9:
1821 term.c.attr.mode |= ATTR_STRUCK;
1822 break;
1823 case 22:
1824 term.c.attr.mode &= ~(ATTR_BOLD | ATTR_FAINT);
1825 break;
1826 case 23:
1827 term.c.attr.mode &= ~ATTR_ITALIC;
1828 break;
1829 case 24:
1830 term.c.attr.mode &= ~ATTR_UNDERLINE;
1831 break;
1832 case 25:
1833 term.c.attr.mode &= ~ATTR_BLINK;
1834 break;
1835 case 27:
1836 term.c.attr.mode &= ~ATTR_REVERSE;
1837 break;
1838 case 28:
1839 term.c.attr.mode &= ~ATTR_INVISIBLE;
1840 break;
1841 case 29:
1842 term.c.attr.mode &= ~ATTR_STRUCK;
1843 break;
1844 case 38:
1845 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1846 term.c.attr.fg = idx;
1847 break;
1848 case 39:
1849 term.c.attr.fg = defaultfg;
1850 break;
1851 case 48:
1852 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1853 term.c.attr.bg = idx;
1854 break;
1855 case 49:
1856 term.c.attr.bg = defaultbg;
1857 break;
1858 default:
1859 if(BETWEEN(attr[i], 30, 37)) {
1860 term.c.attr.fg = attr[i] - 30;
1861 } else if(BETWEEN(attr[i], 40, 47)) {
1862 term.c.attr.bg = attr[i] - 40;
1863 } else if(BETWEEN(attr[i], 90, 97)) {
1864 term.c.attr.fg = attr[i] - 90 + 8;
1865 } else if(BETWEEN(attr[i], 100, 107)) {
1866 term.c.attr.bg = attr[i] - 100 + 8;
1867 } else {
1868 fprintf(stderr,
1869 "erresc(default): gfx attr %d unknown\n",
1870 attr[i]), csidump();
1871 }
1872 break;
1873 }
1874 }
1875 }
1876
1877 void
1878 tsetscroll(int t, int b) {
1879 int temp;
1880
1881 LIMIT(t, 0, term.row-1);
1882 LIMIT(b, 0, term.row-1);
1883 if(t > b) {
1884 temp = t;
1885 t = b;
1886 b = temp;
1887 }
1888 term.top = t;
1889 term.bot = b;
1890 }
1891
1892 void
1893 tsetmode(bool priv, bool set, int *args, int narg) {
1894 int *lim, mode;
1895 bool alt;
1896
1897 for(lim = args + narg; args < lim; ++args) {
1898 if(priv) {
1899 switch(*args) {
1900 case 1: /* DECCKM -- Cursor key */
1901 MODBIT(term.mode, set, MODE_APPCURSOR);
1902 break;
1903 case 5: /* DECSCNM -- Reverse video */
1904 mode = term.mode;
1905 MODBIT(term.mode, set, MODE_REVERSE);
1906 if(mode != term.mode)
1907 redraw();
1908 break;
1909 case 6: /* DECOM -- Origin */
1910 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1911 tmoveato(0, 0);
1912 break;
1913 case 7: /* DECAWM -- Auto wrap */
1914 MODBIT(term.mode, set, MODE_WRAP);
1915 break;
1916 case 0: /* Error (IGNORED) */
1917 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1918 case 3: /* DECCOLM -- Column (IGNORED) */
1919 case 4: /* DECSCLM -- Scroll (IGNORED) */
1920 case 8: /* DECARM -- Auto repeat (IGNORED) */
1921 case 18: /* DECPFF -- Printer feed (IGNORED) */
1922 case 19: /* DECPEX -- Printer extent (IGNORED) */
1923 case 42: /* DECNRCM -- National characters (IGNORED) */
1924 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1925 break;
1926 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1927 MODBIT(term.mode, !set, MODE_HIDE);
1928 break;
1929 case 9: /* X10 mouse compatibility mode */
1930 xsetpointermotion(0);
1931 MODBIT(term.mode, 0, MODE_MOUSE);
1932 MODBIT(term.mode, set, MODE_MOUSEX10);
1933 break;
1934 case 1000: /* 1000: report button press */
1935 xsetpointermotion(0);
1936 MODBIT(term.mode, 0, MODE_MOUSE);
1937 MODBIT(term.mode, set, MODE_MOUSEBTN);
1938 break;
1939 case 1002: /* 1002: report motion on button press */
1940 xsetpointermotion(0);
1941 MODBIT(term.mode, 0, MODE_MOUSE);
1942 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1943 break;
1944 case 1003: /* 1003: enable all mouse motions */
1945 xsetpointermotion(set);
1946 MODBIT(term.mode, 0, MODE_MOUSE);
1947 MODBIT(term.mode, set, MODE_MOUSEMANY);
1948 break;
1949 case 1004: /* 1004: send focus events to tty */
1950 MODBIT(term.mode, set, MODE_FOCUS);
1951 break;
1952 case 1006: /* 1006: extended reporting mode */
1953 MODBIT(term.mode, set, MODE_MOUSESGR);
1954 break;
1955 case 1034:
1956 MODBIT(term.mode, set, MODE_8BIT);
1957 break;
1958 case 1049: /* swap screen & set/restore cursor as xterm */
1959 if (!allowaltscreen)
1960 break;
1961 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1962 /* FALLTHROUGH */
1963 case 47: /* swap screen */
1964 case 1047:
1965 if (!allowaltscreen)
1966 break;
1967 alt = IS_SET(MODE_ALTSCREEN);
1968 if(alt) {
1969 tclearregion(0, 0, term.col-1,
1970 term.row-1);
1971 }
1972 if(set ^ alt) /* set is always 1 or 0 */
1973 tswapscreen();
1974 if(*args != 1049)
1975 break;
1976 /* FALLTHROUGH */
1977 case 1048:
1978 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1979 break;
1980 case 2004: /* 2004: bracketed paste mode */
1981 MODBIT(term.mode, set, MODE_BRCKTPASTE);
1982 break;
1983 /* Not implemented mouse modes. See comments there. */
1984 case 1001: /* mouse highlight mode; can hang the
1985 terminal by design when implemented. */
1986 case 1005: /* UTF-8 mouse mode; will confuse
1987 applications not supporting UTF-8
1988 and luit. */
1989 case 1015: /* urxvt mangled mouse mode; incompatible
1990 and can be mistaken for other control
1991 codes. */
1992 default:
1993 fprintf(stderr,
1994 "erresc: unknown private set/reset mode %d\n",
1995 *args);
1996 break;
1997 }
1998 } else {
1999 switch(*args) {
2000 case 0: /* Error (IGNORED) */
2001 break;
2002 case 2: /* KAM -- keyboard action */
2003 MODBIT(term.mode, set, MODE_KBDLOCK);
2004 break;
2005 case 4: /* IRM -- Insertion-replacement */
2006 MODBIT(term.mode, set, MODE_INSERT);
2007 break;
2008 case 12: /* SRM -- Send/Receive */
2009 MODBIT(term.mode, !set, MODE_ECHO);
2010 break;
2011 case 20: /* LNM -- Linefeed/new line */
2012 MODBIT(term.mode, set, MODE_CRLF);
2013 break;
2014 default:
2015 fprintf(stderr,
2016 "erresc: unknown set/reset mode %d\n",
2017 *args);
2018 break;
2019 }
2020 }
2021 }
2022 }
2023
2024 void
2025 csihandle(void) {
2026 char buf[40];
2027 int len;
2028
2029 switch(csiescseq.mode[0]) {
2030 default:
2031 unknown:
2032 fprintf(stderr, "erresc: unknown csi ");
2033 csidump();
2034 /* die(""); */
2035 break;
2036 case '@': /* ICH -- Insert <n> blank char */
2037 DEFAULT(csiescseq.arg[0], 1);
2038 tinsertblank(csiescseq.arg[0]);
2039 break;
2040 case 'A': /* CUU -- Cursor <n> Up */
2041 DEFAULT(csiescseq.arg[0], 1);
2042 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
2043 break;
2044 case 'B': /* CUD -- Cursor <n> Down */
2045 case 'e': /* VPR --Cursor <n> Down */
2046 DEFAULT(csiescseq.arg[0], 1);
2047 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
2048 break;
2049 case 'i': /* MC -- Media Copy */
2050 switch(csiescseq.arg[0]) {
2051 case 0:
2052 tdump();
2053 break;
2054 case 1:
2055 tdumpline(term.c.y);
2056 break;
2057 case 2:
2058 tdumpsel();
2059 break;
2060 case 4:
2061 term.mode &= ~MODE_PRINT;
2062 break;
2063 case 5:
2064 term.mode |= MODE_PRINT;
2065 break;
2066 }
2067 break;
2068 case 'c': /* DA -- Device Attributes */
2069 if(csiescseq.arg[0] == 0)
2070 ttywrite(vtiden, sizeof(vtiden) - 1);
2071 break;
2072 case 'C': /* CUF -- Cursor <n> Forward */
2073 case 'a': /* HPR -- Cursor <n> Forward */
2074 DEFAULT(csiescseq.arg[0], 1);
2075 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
2076 break;
2077 case 'D': /* CUB -- Cursor <n> Backward */
2078 DEFAULT(csiescseq.arg[0], 1);
2079 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
2080 break;
2081 case 'E': /* CNL -- Cursor <n> Down and first col */
2082 DEFAULT(csiescseq.arg[0], 1);
2083 tmoveto(0, term.c.y+csiescseq.arg[0]);
2084 break;
2085 case 'F': /* CPL -- Cursor <n> Up and first col */
2086 DEFAULT(csiescseq.arg[0], 1);
2087 tmoveto(0, term.c.y-csiescseq.arg[0]);
2088 break;
2089 case 'g': /* TBC -- Tabulation clear */
2090 switch(csiescseq.arg[0]) {
2091 case 0: /* clear current tab stop */
2092 term.tabs[term.c.x] = 0;
2093 break;
2094 case 3: /* clear all the tabs */
2095 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
2096 break;
2097 default:
2098 goto unknown;
2099 }
2100 break;
2101 case 'G': /* CHA -- Move to <col> */
2102 case '`': /* HPA */
2103 DEFAULT(csiescseq.arg[0], 1);
2104 tmoveto(csiescseq.arg[0]-1, term.c.y);
2105 break;
2106 case 'H': /* CUP -- Move to <row> <col> */
2107 case 'f': /* HVP */
2108 DEFAULT(csiescseq.arg[0], 1);
2109 DEFAULT(csiescseq.arg[1], 1);
2110 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
2111 break;
2112 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
2113 DEFAULT(csiescseq.arg[0], 1);
2114 tputtab(csiescseq.arg[0]);
2115 break;
2116 case 'J': /* ED -- Clear screen */
2117 selclear(NULL);
2118 switch(csiescseq.arg[0]) {
2119 case 0: /* below */
2120 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
2121 if(term.c.y < term.row-1) {
2122 tclearregion(0, term.c.y+1, term.col-1,
2123 term.row-1);
2124 }
2125 break;
2126 case 1: /* above */
2127 if(term.c.y > 1)
2128 tclearregion(0, 0, term.col-1, term.c.y-1);
2129 tclearregion(0, term.c.y, term.c.x, term.c.y);
2130 break;
2131 case 2: /* all */
2132 tclearregion(0, 0, term.col-1, term.row-1);
2133 break;
2134 default:
2135 goto unknown;
2136 }
2137 break;
2138 case 'K': /* EL -- Clear line */
2139 switch(csiescseq.arg[0]) {
2140 case 0: /* right */
2141 tclearregion(term.c.x, term.c.y, term.col-1,
2142 term.c.y);
2143 break;
2144 case 1: /* left */
2145 tclearregion(0, term.c.y, term.c.x, term.c.y);
2146 break;
2147 case 2: /* all */
2148 tclearregion(0, term.c.y, term.col-1, term.c.y);
2149 break;
2150 }
2151 break;
2152 case 'S': /* SU -- Scroll <n> line up */
2153 DEFAULT(csiescseq.arg[0], 1);
2154 tscrollup(term.top, csiescseq.arg[0]);
2155 break;
2156 case 'T': /* SD -- Scroll <n> line down */
2157 DEFAULT(csiescseq.arg[0], 1);
2158 tscrolldown(term.top, csiescseq.arg[0]);
2159 break;
2160 case 'L': /* IL -- Insert <n> blank lines */
2161 DEFAULT(csiescseq.arg[0], 1);
2162 tinsertblankline(csiescseq.arg[0]);
2163 break;
2164 case 'l': /* RM -- Reset Mode */
2165 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
2166 break;
2167 case 'M': /* DL -- Delete <n> lines */
2168 DEFAULT(csiescseq.arg[0], 1);
2169 tdeleteline(csiescseq.arg[0]);
2170 break;
2171 case 'X': /* ECH -- Erase <n> char */
2172 DEFAULT(csiescseq.arg[0], 1);
2173 tclearregion(term.c.x, term.c.y,
2174 term.c.x + csiescseq.arg[0] - 1, term.c.y);
2175 break;
2176 case 'P': /* DCH -- Delete <n> char */
2177 DEFAULT(csiescseq.arg[0], 1);
2178 tdeletechar(csiescseq.arg[0]);
2179 break;
2180 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
2181 DEFAULT(csiescseq.arg[0], 1);
2182 tputtab(-csiescseq.arg[0]);
2183 break;
2184 case 'd': /* VPA -- Move to <row> */
2185 DEFAULT(csiescseq.arg[0], 1);
2186 tmoveato(term.c.x, csiescseq.arg[0]-1);
2187 break;
2188 case 'h': /* SM -- Set terminal mode */
2189 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
2190 break;
2191 case 'm': /* SGR -- Terminal attribute (color) */
2192 tsetattr(csiescseq.arg, csiescseq.narg);
2193 break;
2194 case 'n': /* DSR – Device Status Report (cursor position) */
2195 if (csiescseq.arg[0] == 6) {
2196 len = snprintf(buf, sizeof(buf),"\033[%i;%iR",
2197 term.c.y+1, term.c.x+1);
2198 ttywrite(buf, len);
2199 }
2200 break;
2201 case 'r': /* DECSTBM -- Set Scrolling Region */
2202 if(csiescseq.priv) {
2203 goto unknown;
2204 } else {
2205 DEFAULT(csiescseq.arg[0], 1);
2206 DEFAULT(csiescseq.arg[1], term.row);
2207 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
2208 tmoveato(0, 0);
2209 }
2210 break;
2211 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
2212 tcursor(CURSOR_SAVE);
2213 break;
2214 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
2215 tcursor(CURSOR_LOAD);
2216 break;
2217 case ' ':
2218 switch (csiescseq.mode[1]) {
2219 case 'q': /* DECSCUSR -- Set Cursor Style */
2220 DEFAULT(csiescseq.arg[0], 1);
2221 if (!BETWEEN(csiescseq.arg[0], 0, 6)) {
2222 goto unknown;
2223 }
2224 xw.cursor = csiescseq.arg[0];
2225 break;
2226 default:
2227 goto unknown;
2228 }
2229 break;
2230 }
2231 }
2232
2233 void
2234 csidump(void) {
2235 int i;
2236 uint c;
2237
2238 printf("ESC[");
2239 for(i = 0; i < csiescseq.len; i++) {
2240 c = csiescseq.buf[i] & 0xff;
2241 if(isprint(c)) {
2242 putchar(c);
2243 } else if(c == '\n') {
2244 printf("(\\n)");
2245 } else if(c == '\r') {
2246 printf("(\\r)");
2247 } else if(c == 0x1b) {
2248 printf("(\\e)");
2249 } else {
2250 printf("(%02x)", c);
2251 }
2252 }
2253 putchar('\n');
2254 }
2255
2256 void
2257 csireset(void) {
2258 memset(&csiescseq, 0, sizeof(csiescseq));
2259 }
2260
2261 void
2262 strhandle(void) {
2263 char *p = NULL;
2264 int j, narg, par;
2265
2266 term.esc &= ~(ESC_STR_END|ESC_STR);
2267 strparse();
2268 par = (narg = strescseq.narg) ? atoi(strescseq.args[0]) : 0;
2269
2270 switch(strescseq.type) {
2271 case ']': /* OSC -- Operating System Command */
2272 switch(par) {
2273 case 0:
2274 case 1:
2275 case 2:
2276 if(narg > 1)
2277 xsettitle(strescseq.args[1]);
2278 return;
2279 case 4: /* color set */
2280 if(narg < 3)
2281 break;
2282 p = strescseq.args[2];
2283 /* FALLTHROUGH */
2284 case 104: /* color reset, here p = NULL */
2285 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2286 if(xsetcolorname(j, p)) {
2287 fprintf(stderr, "erresc: invalid color %s\n", p);
2288 } else {
2289 /*
2290 * TODO if defaultbg color is changed, borders
2291 * are dirty
2292 */
2293 redraw();
2294 }
2295 return;
2296 }
2297 break;
2298 case 'k': /* old title set compatibility */
2299 xsettitle(strescseq.args[0]);
2300 return;
2301 case 'P': /* DCS -- Device Control String */
2302 case '_': /* APC -- Application Program Command */
2303 case '^': /* PM -- Privacy Message */
2304 return;
2305 }
2306
2307 fprintf(stderr, "erresc: unknown str ");
2308 strdump();
2309 }
2310
2311 void
2312 strparse(void) {
2313 int c;
2314 char *p = strescseq.buf;
2315
2316 strescseq.narg = 0;
2317 strescseq.buf[strescseq.len] = '\0';
2318
2319 if(*p == '\0')
2320 return;
2321
2322 while(strescseq.narg < STR_ARG_SIZ) {
2323 strescseq.args[strescseq.narg++] = p;
2324 while((c = *p) != ';' && c != '\0')
2325 ++p;
2326 if(c == '\0')
2327 return;
2328 *p++ = '\0';
2329 }
2330 }
2331
2332 void
2333 strdump(void) {
2334 int i;
2335 uint c;
2336
2337 printf("ESC%c", strescseq.type);
2338 for(i = 0; i < strescseq.len; i++) {
2339 c = strescseq.buf[i] & 0xff;
2340 if(c == '\0') {
2341 return;
2342 } else if(isprint(c)) {
2343 putchar(c);
2344 } else if(c == '\n') {
2345 printf("(\\n)");
2346 } else if(c == '\r') {
2347 printf("(\\r)");
2348 } else if(c == 0x1b) {
2349 printf("(\\e)");
2350 } else {
2351 printf("(%02x)", c);
2352 }
2353 }
2354 printf("ESC\\\n");
2355 }
2356
2357 void
2358 strreset(void) {
2359 memset(&strescseq, 0, sizeof(strescseq));
2360 }
2361
2362 void
2363 tprinter(char *s, size_t len) {
2364 if(iofd != -1 && xwrite(iofd, s, len) < 0) {
2365 fprintf(stderr, "Error writing in %s:%s\n",
2366 opt_io, strerror(errno));
2367 close(iofd);
2368 iofd = -1;
2369 }
2370 }
2371
2372 void
2373 toggleprinter(const Arg *arg) {
2374 term.mode ^= MODE_PRINT;
2375 }
2376
2377 void
2378 printscreen(const Arg *arg) {
2379 tdump();
2380 }
2381
2382 void
2383 printsel(const Arg *arg) {
2384 tdumpsel();
2385 }
2386
2387 void
2388 tdumpsel(void) {
2389 char *ptr;
2390
2391 if((ptr = getsel())) {
2392 tprinter(ptr, strlen(ptr));
2393 free(ptr);
2394 }
2395 }
2396
2397 void
2398 tdumpline(int n) {
2399 char buf[UTF_SIZ];
2400 Glyph *bp, *end;
2401
2402 bp = &term.line[n][0];
2403 end = &bp[MIN(tlinelen(n), term.col) - 1];
2404 if(bp != end || bp->u != ' ') {
2405 for( ;bp <= end; ++bp)
2406 tprinter(buf, utf8encode(bp->u, buf));
2407 }
2408 tprinter("\n", 1);
2409 }
2410
2411 void
2412 tdump(void) {
2413 int i;
2414
2415 for(i = 0; i < term.row; ++i)
2416 tdumpline(i);
2417 }
2418
2419 void
2420 tputtab(int n) {
2421 uint x = term.c.x;
2422
2423 if(n > 0) {
2424 while(x < term.col && n--)
2425 for(++x; x < term.col && !term.tabs[x]; ++x)
2426 /* nothing */ ;
2427 } else if(n < 0) {
2428 while(x > 0 && n++)
2429 for(--x; x > 0 && !term.tabs[x]; --x)
2430 /* nothing */ ;
2431 }
2432 term.c.x = LIMIT(x, 0, term.col-1);
2433 }
2434
2435 void
2436 techo(long u) {
2437 if(ISCONTROL(u)) { /* control code */
2438 if(u & 0x80) {
2439 u &= 0x7f;
2440 tputc('^');
2441 tputc('[');
2442 } else if(u != '\n' && u != '\r' && u != '\t') {
2443 u ^= 0x40;
2444 tputc('^');
2445 }
2446 }
2447 tputc(u);
2448 }
2449
2450 void
2451 tdeftran(char ascii) {
2452 static char cs[] = "0B";
2453 static int vcs[] = {CS_GRAPHIC0, CS_USA};
2454 char *p;
2455
2456 if((p = strchr(cs, ascii)) == NULL) {
2457 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2458 } else {
2459 term.trantbl[term.icharset] = vcs[p - cs];
2460 }
2461 }
2462
2463 void
2464 tdectest(char c) {
2465 int x, y;
2466
2467 if(c == '8') { /* DEC screen alignment test. */
2468 for(x = 0; x < term.col; ++x) {
2469 for(y = 0; y < term.row; ++y)
2470 tsetchar('E', &term.c.attr, x, y);
2471 }
2472 }
2473 }
2474
2475 void
2476 tstrsequence(uchar c) {
2477 switch (c) {
2478 case 0x90: /* DCS -- Device Control String */
2479 c = 'P';
2480 break;
2481 case 0x9f: /* APC -- Application Program Command */
2482 c = '_';
2483 break;
2484 case 0x9e: /* PM -- Privacy Message */
2485 c = '^';
2486 break;
2487 case 0x9d: /* OSC -- Operating System Command */
2488 c = ']';
2489 break;
2490 }
2491 strreset();
2492 strescseq.type = c;
2493 term.esc |= ESC_STR;
2494 }
2495
2496 void
2497 tcontrolcode(uchar ascii) {
2498 switch(ascii) {
2499 case '\t': /* HT */
2500 tputtab(1);
2501 return;
2502 case '\b': /* BS */
2503 tmoveto(term.c.x-1, term.c.y);
2504 return;
2505 case '\r': /* CR */
2506 tmoveto(0, term.c.y);
2507 return;
2508 case '\f': /* LF */
2509 case '\v': /* VT */
2510 case '\n': /* LF */
2511 /* go to first col if the mode is set */
2512 tnewline(IS_SET(MODE_CRLF));
2513 return;
2514 case '\a': /* BEL */
2515 if(term.esc & ESC_STR_END) {
2516 /* backwards compatibility to xterm */
2517 strhandle();
2518 } else {
2519 if(!(xw.state & WIN_FOCUSED))
2520 xseturgency(1);
2521 if (bellvolume)
2522 XkbBell(xw.dpy, xw.win, bellvolume, (Atom)NULL);
2523 }
2524 break;
2525 case '\033': /* ESC */
2526 csireset();
2527 term.esc &= ~(ESC_CSI|ESC_ALTCHARSET|ESC_TEST);
2528 term.esc |= ESC_START;
2529 return;
2530 case '\016': /* SO (LS1 -- Locking shift 1) */
2531 case '\017': /* SI (LS0 -- Locking shift 0) */
2532 term.charset = 1 - (ascii - '\016');
2533 return;
2534 case '\032': /* SUB */
2535 tsetchar('?', &term.c.attr, term.c.x, term.c.y);
2536 case '\030': /* CAN */
2537 csireset();
2538 break;
2539 case '\005': /* ENQ (IGNORED) */
2540 case '\000': /* NUL (IGNORED) */
2541 case '\021': /* XON (IGNORED) */
2542 case '\023': /* XOFF (IGNORED) */
2543 case 0177: /* DEL (IGNORED) */
2544 return;
2545 case 0x84: /* TODO: IND */
2546 break;
2547 case 0x85: /* NEL -- Next line */
2548 tnewline(1); /* always go to first col */
2549 break;
2550 case 0x88: /* HTS -- Horizontal tab stop */
2551 term.tabs[term.c.x] = 1;
2552 break;
2553 case 0x8d: /* TODO: RI */
2554 case 0x8e: /* TODO: SS2 */
2555 case 0x8f: /* TODO: SS3 */
2556 case 0x98: /* TODO: SOS */
2557 break;
2558 case 0x9a: /* DECID -- Identify Terminal */
2559 ttywrite(vtiden, sizeof(vtiden) - 1);
2560 break;
2561 case 0x9b: /* TODO: CSI */
2562 case 0x9c: /* TODO: ST */
2563 break;
2564 case 0x90: /* DCS -- Device Control String */
2565 case 0x9f: /* APC -- Application Program Command */
2566 case 0x9e: /* PM -- Privacy Message */
2567 case 0x9d: /* OSC -- Operating System Command */
2568 tstrsequence(ascii);
2569 return;
2570 }
2571 /* only CAN, SUB, \a and C1 chars interrupt a sequence */
2572 term.esc &= ~(ESC_STR_END|ESC_STR);
2573 }
2574
2575 /*
2576 * returns 1 when the sequence is finished and it hasn't to read
2577 * more characters for this sequence, otherwise 0
2578 */
2579 int
2580 eschandle(uchar ascii) {
2581 switch(ascii) {
2582 case '[':
2583 term.esc |= ESC_CSI;
2584 return 0;
2585 case '#':
2586 term.esc |= ESC_TEST;
2587 return 0;
2588 case 'P': /* DCS -- Device Control String */
2589 case '_': /* APC -- Application Program Command */
2590 case '^': /* PM -- Privacy Message */
2591 case ']': /* OSC -- Operating System Command */
2592 case 'k': /* old title set compatibility */
2593 tstrsequence(ascii);
2594 return 0;
2595 case 'n': /* LS2 -- Locking shift 2 */
2596 case 'o': /* LS3 -- Locking shift 3 */
2597 term.charset = 2 + (ascii - 'n');
2598 break;
2599 case '(': /* GZD4 -- set primary charset G0 */
2600 case ')': /* G1D4 -- set secondary charset G1 */
2601 case '*': /* G2D4 -- set tertiary charset G2 */
2602 case '+': /* G3D4 -- set quaternary charset G3 */
2603 term.icharset = ascii - '(';
2604 term.esc |= ESC_ALTCHARSET;
2605 return 0;
2606 case 'D': /* IND -- Linefeed */
2607 if(term.c.y == term.bot) {
2608 tscrollup(term.top, 1);
2609 } else {
2610 tmoveto(term.c.x, term.c.y+1);
2611 }
2612 break;
2613 case 'E': /* NEL -- Next line */
2614 tnewline(1); /* always go to first col */
2615 break;
2616 case 'H': /* HTS -- Horizontal tab stop */
2617 term.tabs[term.c.x] = 1;
2618 break;
2619 case 'M': /* RI -- Reverse index */
2620 if(term.c.y == term.top) {
2621 tscrolldown(term.top, 1);
2622 } else {
2623 tmoveto(term.c.x, term.c.y-1);
2624 }
2625 break;
2626 case 'Z': /* DECID -- Identify Terminal */
2627 ttywrite(vtiden, sizeof(vtiden) - 1);
2628 break;
2629 case 'c': /* RIS -- Reset to inital state */
2630 treset();
2631 xresettitle();
2632 xloadcols();
2633 break;
2634 case '=': /* DECPAM -- Application keypad */
2635 term.mode |= MODE_APPKEYPAD;
2636 break;
2637 case '>': /* DECPNM -- Normal keypad */
2638 term.mode &= ~MODE_APPKEYPAD;
2639 break;
2640 case '7': /* DECSC -- Save Cursor */
2641 tcursor(CURSOR_SAVE);
2642 break;
2643 case '8': /* DECRC -- Restore Cursor */
2644 tcursor(CURSOR_LOAD);
2645 break;
2646 case '\\': /* ST -- String Terminator */
2647 if(term.esc & ESC_STR_END)
2648 strhandle();
2649 break;
2650 default:
2651 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2652 (uchar) ascii, isprint(ascii)? ascii:'.');
2653 break;
2654 }
2655 return 1;
2656 }
2657
2658 void
2659 tputc(long u) {
2660 char c[UTF_SIZ];
2661 bool control;
2662 int width, len;
2663 Glyph *gp;
2664
2665 len = utf8encode(u, c);
2666 if((width = wcwidth(u)) == -1) {
2667 memcpy(c, "\357\277\275", 4); /* UTF_INVALID */
2668 width = 1;
2669 }
2670
2671 if(IS_SET(MODE_PRINT))
2672 tprinter(c, len);
2673 control = ISCONTROL(u);
2674
2675 /*
2676 * STR sequence must be checked before anything else
2677 * because it uses all following characters until it
2678 * receives a ESC, a SUB, a ST or any other C1 control
2679 * character.
2680 */
2681 if(term.esc & ESC_STR) {
2682 if(u == '\a' || u == 030 || u == 032 || u == 033 ||
2683 ISCONTROLC1(u)) {
2684 term.esc &= ~(ESC_START|ESC_STR);
2685 term.esc |= ESC_STR_END;
2686 } else if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2687 memmove(&strescseq.buf[strescseq.len], c, len);
2688 strescseq.len += len;
2689 return;
2690 } else {
2691 /*
2692 * Here is a bug in terminals. If the user never sends
2693 * some code to stop the str or esc command, then st
2694 * will stop responding. But this is better than
2695 * silently failing with unknown characters. At least
2696 * then users will report back.
2697 *
2698 * In the case users ever get fixed, here is the code:
2699 */
2700 /*
2701 * term.esc = 0;
2702 * strhandle();
2703 */
2704 return;
2705 }
2706 }
2707
2708 /*
2709 * Actions of control codes must be performed as soon they arrive
2710 * because they can be embedded inside a control sequence, and
2711 * they must not cause conflicts with sequences.
2712 */
2713 if(control) {
2714 tcontrolcode(u);
2715 /*
2716 * control codes are not shown ever
2717 */
2718 return;
2719 } else if(term.esc & ESC_START) {
2720 if(term.esc & ESC_CSI) {
2721 csiescseq.buf[csiescseq.len++] = u;
2722 if(BETWEEN(u, 0x40, 0x7E)
2723 || csiescseq.len >= \
2724 sizeof(csiescseq.buf)-1) {
2725 term.esc = 0;
2726 csiparse();
2727 csihandle();
2728 }
2729 return;
2730 } else if(term.esc & ESC_ALTCHARSET) {
2731 tdeftran(u);
2732 } else if(term.esc & ESC_TEST) {
2733 tdectest(u);
2734 } else {
2735 if (!eschandle(u))
2736 return;
2737 /* sequence already finished */
2738 }
2739 term.esc = 0;
2740 /*
2741 * All characters which form part of a sequence are not
2742 * printed
2743 */
2744 return;
2745 }
2746 if(sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
2747 selclear(NULL);
2748
2749 gp = &term.line[term.c.y][term.c.x];
2750 if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2751 gp->mode |= ATTR_WRAP;
2752 tnewline(1);
2753 gp = &term.line[term.c.y][term.c.x];
2754 }
2755
2756 if(IS_SET(MODE_INSERT) && term.c.x+width < term.col)
2757 memmove(gp+width, gp, (term.col - term.c.x - width) * sizeof(Glyph));
2758
2759 if(term.c.x+width > term.col) {
2760 tnewline(1);
2761 gp = &term.line[term.c.y][term.c.x];
2762 }
2763
2764 tsetchar(u, &term.c.attr, term.c.x, term.c.y);
2765
2766 if(width == 2) {
2767 gp->mode |= ATTR_WIDE;
2768 if(term.c.x+1 < term.col) {
2769 gp[1].u = '\0';
2770 gp[1].mode = ATTR_WDUMMY;
2771 }
2772 }
2773 if(term.c.x+width < term.col) {
2774 tmoveto(term.c.x+width, term.c.y);
2775 } else {
2776 term.c.state |= CURSOR_WRAPNEXT;
2777 }
2778 }
2779
2780 void
2781 tresize(int col, int row) {
2782 int i;
2783 int minrow = MIN(row, term.row);
2784 int mincol = MIN(col, term.col);
2785 bool *bp;
2786 TCursor c;
2787
2788 if(col < 1 || row < 1) {
2789 fprintf(stderr,
2790 "tresize: error resizing to %dx%d\n", col, row);
2791 return;
2792 }
2793
2794 /*
2795 * slide screen to keep cursor where we expect it -
2796 * tscrollup would work here, but we can optimize to
2797 * memmove because we're freeing the earlier lines
2798 */
2799 for(i = 0; i <= term.c.y - row; i++) {
2800 free(term.line[i]);
2801 free(term.alt[i]);
2802 }
2803 /* ensure that both src and dst are not NULL */
2804 if (i > 0) {
2805 memmove(term.line, term.line + i, row * sizeof(Line));
2806 memmove(term.alt, term.alt + i, row * sizeof(Line));
2807 }
2808 for(i += row; i < term.row; i++) {
2809 free(term.line[i]);
2810 free(term.alt[i]);
2811 }
2812
2813 /* resize to new height */
2814 term.line = xrealloc(term.line, row * sizeof(Line));
2815 term.alt = xrealloc(term.alt, row * sizeof(Line));
2816 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2817 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2818
2819 /* resize each row to new width, zero-pad if needed */
2820 for(i = 0; i < minrow; i++) {
2821 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2822 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2823 }
2824
2825 /* allocate any new rows */
2826 for(/* i == minrow */; i < row; i++) {
2827 term.line[i] = xmalloc(col * sizeof(Glyph));
2828 term.alt[i] = xmalloc(col * sizeof(Glyph));
2829 }
2830 if(col > term.col) {
2831 bp = term.tabs + term.col;
2832
2833 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2834 while(--bp > term.tabs && !*bp)
2835 /* nothing */ ;
2836 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2837 *bp = 1;
2838 }
2839 /* update terminal size */
2840 term.col = col;
2841 term.row = row;
2842 /* reset scrolling region */
2843 tsetscroll(0, row-1);
2844 /* make use of the LIMIT in tmoveto */
2845 tmoveto(term.c.x, term.c.y);
2846 /* Clearing both screens (it makes dirty all lines) */
2847 c = term.c;
2848 for(i = 0; i < 2; i++) {
2849 if(mincol < col && 0 < minrow) {
2850 tclearregion(mincol, 0, col - 1, minrow - 1);
2851 }
2852 if(0 < col && minrow < row) {
2853 tclearregion(0, minrow, col - 1, row - 1);
2854 }
2855 tswapscreen();
2856 tcursor(CURSOR_LOAD);
2857 }
2858 term.c = c;
2859 }
2860
2861 void
2862 xresize(int col, int row) {
2863 xw.tw = MAX(1, col * xw.cw);
2864 xw.th = MAX(1, row * xw.ch);
2865
2866 XFreePixmap(xw.dpy, xw.buf);
2867 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2868 DefaultDepth(xw.dpy, xw.scr));
2869 XftDrawChange(xw.draw, xw.buf);
2870 xclear(0, 0, xw.w, xw.h);
2871 }
2872
2873 ushort
2874 sixd_to_16bit(int x) {
2875 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2876 }
2877
2878 bool
2879 xloadcolor(int i, const char *name, Color *ncolor) {
2880 XRenderColor color = { .alpha = 0xffff };
2881
2882 if(!name) {
2883 if(BETWEEN(i, 16, 255)) { /* 256 color */
2884 if(i < 6*6*6+16) { /* same colors as xterm */
2885 color.red = sixd_to_16bit( ((i-16)/36)%6 );
2886 color.green = sixd_to_16bit( ((i-16)/6) %6 );
2887 color.blue = sixd_to_16bit( ((i-16)/1) %6 );
2888 } else { /* greyscale */
2889 color.red = 0x0808 + 0x0a0a * (i - (6*6*6+16));
2890 color.green = color.blue = color.red;
2891 }
2892 return XftColorAllocValue(xw.dpy, xw.vis,
2893 xw.cmap, &color, ncolor);
2894 } else
2895 name = colorname[i];
2896 }
2897 return XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, ncolor);
2898 }
2899
2900 void
2901 xloadcols(void) {
2902 int i;
2903 static bool loaded;
2904 Color *cp;
2905
2906 if(loaded) {
2907 for (cp = dc.col; cp < &dc.col[LEN(dc.col)]; ++cp)
2908 XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
2909 }
2910
2911 for(i = 0; i < LEN(dc.col); i++)
2912 if(!xloadcolor(i, NULL, &dc.col[i])) {
2913 if(colorname[i])
2914 die("Could not allocate color '%s'\n", colorname[i]);
2915 else
2916 die("Could not allocate color %d\n", i);
2917 }
2918 loaded = true;
2919 }
2920
2921 int
2922 xsetcolorname(int x, const char *name) {
2923 Color ncolor;
2924
2925 if(!BETWEEN(x, 0, LEN(dc.col)))
2926 return 1;
2927
2928
2929 if(!xloadcolor(x, name, &ncolor))
2930 return 1;
2931
2932 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2933 dc.col[x] = ncolor;
2934 return 0;
2935 }
2936
2937 void
2938 xtermclear(int col1, int row1, int col2, int row2) {
2939 XftDrawRect(xw.draw,
2940 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2941 borderpx + col1 * xw.cw,
2942 borderpx + row1 * xw.ch,
2943 (col2-col1+1) * xw.cw,
2944 (row2-row1+1) * xw.ch);
2945 }
2946
2947 /*
2948 * Absolute coordinates.
2949 */
2950 void
2951 xclear(int x1, int y1, int x2, int y2) {
2952 XftDrawRect(xw.draw,
2953 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2954 x1, y1, x2-x1, y2-y1);
2955 }
2956
2957 void
2958 xhints(void) {
2959 XClassHint class = {opt_class ? opt_class : termname, termname};
2960 XWMHints wm = {.flags = InputHint, .input = 1};
2961 XSizeHints *sizeh = NULL;
2962
2963 sizeh = XAllocSizeHints();
2964
2965 sizeh->flags = PSize | PResizeInc | PBaseSize;
2966 sizeh->height = xw.h;
2967 sizeh->width = xw.w;
2968 sizeh->height_inc = xw.ch;
2969 sizeh->width_inc = xw.cw;
2970 sizeh->base_height = 2 * borderpx;
2971 sizeh->base_width = 2 * borderpx;
2972 if(xw.isfixed == True) {
2973 sizeh->flags |= PMaxSize | PMinSize;
2974 sizeh->min_width = sizeh->max_width = xw.w;
2975 sizeh->min_height = sizeh->max_height = xw.h;
2976 }
2977 if(xw.gm & (XValue|YValue)) {
2978 sizeh->flags |= USPosition | PWinGravity;
2979 sizeh->x = xw.l;
2980 sizeh->y = xw.t;
2981 sizeh->win_gravity = xgeommasktogravity(xw.gm);
2982 }
2983
2984 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
2985 &class);
2986 XFree(sizeh);
2987 }
2988
2989 int
2990 xgeommasktogravity(int mask) {
2991 switch(mask & (XNegative|YNegative)) {
2992 case 0:
2993 return NorthWestGravity;
2994 case XNegative:
2995 return NorthEastGravity;
2996 case YNegative:
2997 return SouthWestGravity;
2998 }
2999 return SouthEastGravity;
3000 }
3001
3002 int
3003 xloadfont(Font *f, FcPattern *pattern) {
3004 FcPattern *match;
3005 FcResult result;
3006
3007 match = FcFontMatch(NULL, pattern, &result);
3008 if(!match)
3009 return 1;
3010
3011 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
3012 FcPatternDestroy(match);
3013 return 1;
3014 }
3015
3016 f->set = NULL;
3017 f->pattern = FcPatternDuplicate(pattern);
3018
3019 f->ascent = f->match->ascent;
3020 f->descent = f->match->descent;
3021 f->lbearing = 0;
3022 f->rbearing = f->match->max_advance_width;
3023
3024 f->height = f->ascent + f->descent;
3025 f->width = f->lbearing + f->rbearing;
3026
3027 return 0;
3028 }
3029
3030 void
3031 xloadfonts(char *fontstr, double fontsize) {
3032 FcPattern *pattern;
3033 FcResult r_sz, r_psz;
3034 double fontval;
3035 float ceilf(float);
3036
3037 if(fontstr[0] == '-') {
3038 pattern = XftXlfdParse(fontstr, False, False);
3039 } else {
3040 pattern = FcNameParse((FcChar8 *)fontstr);
3041 }
3042
3043 if(!pattern)
3044 die("st: can't open font %s\n", fontstr);
3045
3046 if(fontsize > 1) {
3047 FcPatternDel(pattern, FC_PIXEL_SIZE);
3048 FcPatternDel(pattern, FC_SIZE);
3049 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
3050 usedfontsize = fontsize;
3051 } else {
3052 r_psz = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
3053 r_sz = FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval);
3054 if(r_psz == FcResultMatch) {
3055 usedfontsize = fontval;
3056 } else if(r_sz == FcResultMatch) {
3057 usedfontsize = -1;
3058 } else {
3059 /*
3060 * Default font size is 12, if none given. This is to
3061 * have a known usedfontsize value.
3062 */
3063 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
3064 usedfontsize = 12;
3065 }
3066 defaultfontsize = usedfontsize;
3067 }
3068
3069 FcConfigSubstitute(0, pattern, FcMatchPattern);
3070 FcDefaultSubstitute(pattern);
3071
3072 if(xloadfont(&dc.font, pattern))
3073 die("st: can't open font %s\n", fontstr);
3074
3075 if(usedfontsize < 0) {
3076 FcPatternGetDouble(dc.font.match->pattern,
3077 FC_PIXEL_SIZE, 0, &fontval);
3078 usedfontsize = fontval;
3079 if(fontsize == 0)
3080 defaultfontsize = fontval;
3081 }
3082
3083 /* Setting character width and height. */
3084 xw.cw = ceilf(dc.font.width * cwscale);
3085 xw.ch = ceilf(dc.font.height * chscale);
3086
3087 FcPatternDel(pattern, FC_SLANT);
3088 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
3089 if(xloadfont(&dc.ifont, pattern))
3090 die("st: can't open font %s\n", fontstr);
3091
3092 FcPatternDel(pattern, FC_WEIGHT);
3093 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
3094 if(xloadfont(&dc.ibfont, pattern))
3095 die("st: can't open font %s\n", fontstr);
3096
3097 FcPatternDel(pattern, FC_SLANT);
3098 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
3099 if(xloadfont(&dc.bfont, pattern))
3100 die("st: can't open font %s\n", fontstr);
3101
3102 FcPatternDestroy(pattern);
3103 }
3104
3105 void
3106 xunloadfont(Font *f) {
3107 XftFontClose(xw.dpy, f->match);
3108 FcPatternDestroy(f->pattern);
3109 if(f->set)
3110 FcFontSetDestroy(f->set);
3111 }
3112
3113 void
3114 xunloadfonts(void) {
3115 /* Free the loaded fonts in the font cache. */
3116 while(frclen > 0)
3117 XftFontClose(xw.dpy, frc[--frclen].font);
3118
3119 xunloadfont(&dc.font);
3120 xunloadfont(&dc.bfont);
3121 xunloadfont(&dc.ifont);
3122 xunloadfont(&dc.ibfont);
3123 }
3124
3125 void
3126 xzoom(const Arg *arg) {
3127 Arg larg;
3128
3129 larg.i = usedfontsize + arg->i;
3130 xzoomabs(&larg);
3131 }
3132
3133 void
3134 xzoomabs(const Arg *arg) {
3135 xunloadfonts();
3136 xloadfonts(usedfont, arg->i);
3137 cresize(0, 0);
3138 redraw();
3139 xhints();
3140 }
3141
3142 void
3143 xzoomreset(const Arg *arg) {
3144 Arg larg;
3145
3146 if(defaultfontsize > 0) {
3147 larg.i = defaultfontsize;
3148 xzoomabs(&larg);
3149 }
3150 }
3151
3152 void
3153 xinit(void) {
3154 XGCValues gcvalues;
3155 Cursor cursor;
3156 Window parent;
3157 pid_t thispid = getpid();
3158
3159 if(!(xw.dpy = XOpenDisplay(NULL)))
3160 die("Can't open display\n");
3161 xw.scr = XDefaultScreen(xw.dpy);
3162 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
3163
3164 /* font */
3165 if(!FcInit())
3166 die("Could not init fontconfig.\n");
3167
3168 usedfont = (opt_font == NULL)? font : opt_font;
3169 xloadfonts(usedfont, 0);
3170
3171 /* colors */
3172 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
3173 xloadcols();
3174
3175 /* adjust fixed window geometry */
3176 xw.w = 2 * borderpx + term.col * xw.cw;
3177 xw.h = 2 * borderpx + term.row * xw.ch;
3178 if(xw.gm & XNegative)
3179 xw.l += DisplayWidth(xw.dpy, xw.scr) - xw.w - 2;
3180 if(xw.gm & YNegative)
3181 xw.t += DisplayWidth(xw.dpy, xw.scr) - xw.h - 2;
3182
3183 /* Events */
3184 xw.attrs.background_pixel = dc.col[defaultbg].pixel;
3185 xw.attrs.border_pixel = dc.col[defaultbg].pixel;
3186 xw.attrs.bit_gravity = NorthWestGravity;
3187 xw.attrs.event_mask = FocusChangeMask | KeyPressMask
3188 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
3189 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
3190 xw.attrs.colormap = xw.cmap;
3191
3192 if (!(opt_embed && (parent = strtol(opt_embed, NULL, 0))))
3193 parent = XRootWindow(xw.dpy, xw.scr);
3194 xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
3195 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
3196 xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
3197 | CWEventMask | CWColormap, &xw.attrs);
3198
3199 memset(&gcvalues, 0, sizeof(gcvalues));
3200 gcvalues.graphics_exposures = False;
3201 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
3202 &gcvalues);
3203 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
3204 DefaultDepth(xw.dpy, xw.scr));
3205 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
3206 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
3207
3208 /* Xft rendering context */
3209 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
3210
3211 /* input methods */
3212 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3213 XSetLocaleModifiers("@im=local");
3214 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3215 XSetLocaleModifiers("@im=");
3216 if((xw.xim = XOpenIM(xw.dpy,
3217 NULL, NULL, NULL)) == NULL) {
3218 die("XOpenIM failed. Could not open input"
3219 " device.\n");
3220 }
3221 }
3222 }
3223 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
3224 | XIMStatusNothing, XNClientWindow, xw.win,
3225 XNFocusWindow, xw.win, NULL);
3226 if(xw.xic == NULL)
3227 die("XCreateIC failed. Could not obtain input method.\n");
3228
3229 /* white cursor, black outline */
3230 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
3231 XDefineCursor(xw.dpy, xw.win, cursor);
3232 XRecolorCursor(xw.dpy, cursor,
3233 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
3234 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
3235
3236 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
3237 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
3238 xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
3239 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
3240
3241 xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
3242 XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
3243 PropModeReplace, (uchar *)&thispid, 1);
3244
3245 xresettitle();
3246 XMapWindow(xw.dpy, xw.win);
3247 xhints();
3248 XSync(xw.dpy, False);
3249 }
3250
3251 void
3252 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
3253 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
3254 width = charlen * xw.cw, xp, i;
3255 int frcflags, charexists;
3256 int u8fl, u8fblen, u8cblen, doesexist;
3257 char *u8c, *u8fs;
3258 long unicodep;
3259 Font *font = &dc.font;
3260 FcResult fcres;
3261 FcPattern *fcpattern, *fontpattern;
3262 FcFontSet *fcsets[] = { NULL };
3263 FcCharSet *fccharset;
3264 Color *fg, *bg, *temp, revfg, revbg, truefg, truebg;
3265 XRenderColor colfg, colbg;
3266 XRectangle r;
3267 int oneatatime;
3268
3269 frcflags = FRC_NORMAL;
3270
3271 if(base.mode & ATTR_ITALIC) {
3272 if(base.fg == defaultfg)
3273 base.fg = defaultitalic;
3274 font = &dc.ifont;
3275 frcflags = FRC_ITALIC;
3276 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
3277 if(base.fg == defaultfg)
3278 base.fg = defaultitalic;
3279 font = &dc.ibfont;
3280 frcflags = FRC_ITALICBOLD;
3281 } else if(base.mode & ATTR_UNDERLINE) {
3282 if(base.fg == defaultfg)
3283 base.fg = defaultunderline;
3284 }
3285
3286 if(IS_TRUECOL(base.fg)) {
3287 colfg.alpha = 0xffff;
3288 colfg.red = TRUERED(base.fg);
3289 colfg.green = TRUEGREEN(base.fg);
3290 colfg.blue = TRUEBLUE(base.fg);
3291 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
3292 fg = &truefg;
3293 } else {
3294 fg = &dc.col[base.fg];
3295 }
3296
3297 if(IS_TRUECOL(base.bg)) {
3298 colbg.alpha = 0xffff;
3299 colbg.green = TRUEGREEN(base.bg);
3300 colbg.red = TRUERED(base.bg);
3301 colbg.blue = TRUEBLUE(base.bg);
3302 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
3303 bg = &truebg;
3304 } else {
3305 bg = &dc.col[base.bg];
3306 }
3307
3308 if(base.mode & ATTR_BOLD) {
3309 /*
3310 * change basic system colors [0-7]
3311 * to bright system colors [8-15]
3312 */
3313 if(BETWEEN(base.fg, 0, 7) && !(base.mode & ATTR_FAINT))
3314 fg = &dc.col[base.fg + 8];
3315
3316 if(base.mode & ATTR_ITALIC) {
3317 font = &dc.ibfont;
3318 frcflags = FRC_ITALICBOLD;
3319 } else {
3320 font = &dc.bfont;
3321 frcflags = FRC_BOLD;
3322 }
3323 }
3324
3325 if(IS_SET(MODE_REVERSE)) {
3326 if(fg == &dc.col[defaultfg]) {
3327 fg = &dc.col[defaultbg];
3328 } else {
3329 colfg.red = ~fg->color.red;
3330 colfg.green = ~fg->color.green;
3331 colfg.blue = ~fg->color.blue;
3332 colfg.alpha = fg->color.alpha;
3333 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
3334 &revfg);
3335 fg = &revfg;
3336 }
3337
3338 if(bg == &dc.col[defaultbg]) {
3339 bg = &dc.col[defaultfg];
3340 } else {
3341 colbg.red = ~bg->color.red;
3342 colbg.green = ~bg->color.green;
3343 colbg.blue = ~bg->color.blue;
3344 colbg.alpha = bg->color.alpha;
3345 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
3346 &revbg);
3347 bg = &revbg;
3348 }
3349 }
3350
3351 if(base.mode & ATTR_REVERSE) {
3352 temp = fg;
3353 fg = bg;
3354 bg = temp;
3355 }
3356
3357 if(base.mode & ATTR_FAINT && !(base.mode & ATTR_BOLD)) {
3358 colfg.red = fg->color.red / 2;
3359 colfg.green = fg->color.green / 2;
3360 colfg.blue = fg->color.blue / 2;
3361 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
3362 fg = &revfg;
3363 }
3364
3365 if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
3366 fg = bg;
3367
3368 if(base.mode & ATTR_INVISIBLE)
3369 fg = bg;
3370
3371 /* Intelligent cleaning up of the borders. */
3372 if(x == 0) {
3373 xclear(0, (y == 0)? 0 : winy, borderpx,
3374 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
3375 }
3376 if(x + charlen >= term.col) {
3377 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
3378 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
3379 }
3380 if(y == 0)
3381 xclear(winx, 0, winx + width, borderpx);
3382 if(y == term.row-1)
3383 xclear(winx, winy + xw.ch, winx + width, xw.h);
3384
3385 /* Clean up the region we want to draw to. */
3386 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
3387
3388 /* Set the clip region because Xft is sometimes dirty. */
3389 r.x = 0;
3390 r.y = 0;
3391 r.height = xw.ch;
3392 r.width = width;
3393 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
3394
3395 for(xp = winx; bytelen > 0;) {
3396 /*
3397 * Search for the range in the to be printed string of glyphs
3398 * that are in the main font. Then print that range. If
3399 * some glyph is found that is not in the font, do the
3400 * fallback dance.
3401 */
3402 u8fs = s;
3403 u8fblen = 0;
3404 u8fl = 0;
3405 oneatatime = font->width != xw.cw;
3406 for(;;) {
3407 u8c = s;
3408 u8cblen = utf8decode(s, &unicodep, UTF_SIZ);
3409 s += u8cblen;
3410 bytelen -= u8cblen;
3411
3412 doesexist = XftCharExists(xw.dpy, font->match, unicodep);
3413 if(doesexist) {
3414 u8fl++;
3415 u8fblen += u8cblen;
3416 if(!oneatatime && bytelen > 0)
3417 continue;
3418 }
3419
3420 if(u8fl > 0) {
3421 XftDrawStringUtf8(xw.draw, fg,
3422 font->match, xp,
3423 winy + font->ascent,
3424 (FcChar8 *)u8fs,
3425 u8fblen);
3426 xp += xw.cw * u8fl;
3427 }
3428 break;
3429 }
3430 if(doesexist) {
3431 if(oneatatime)
3432 continue;
3433 break;
3434 }
3435
3436 /* Search the font cache. */
3437 for(i = 0; i < frclen; i++) {
3438 charexists = XftCharExists(xw.dpy, frc[i].font, unicodep);
3439 /* Everything correct. */
3440 if(charexists && frc[i].flags == frcflags)
3441 break;
3442 /* We got a default font for a not found glyph. */
3443 if(!charexists && frc[i].flags == frcflags \
3444 && frc[i].unicodep == unicodep) {
3445 break;
3446 }
3447 }
3448
3449 /* Nothing was found. */
3450 if(i >= frclen) {
3451 if(!font->set)
3452 font->set = FcFontSort(0, font->pattern,
3453 FcTrue, 0, &fcres);
3454 fcsets[0] = font->set;
3455
3456 /*
3457 * Nothing was found in the cache. Now use
3458 * some dozen of Fontconfig calls to get the
3459 * font for one single character.
3460 *
3461 * Xft and fontconfig are design failures.
3462 */
3463 fcpattern = FcPatternDuplicate(font->pattern);
3464 fccharset = FcCharSetCreate();
3465
3466 FcCharSetAddChar(fccharset, unicodep);
3467 FcPatternAddCharSet(fcpattern, FC_CHARSET,
3468 fccharset);
3469 FcPatternAddBool(fcpattern, FC_SCALABLE,
3470 FcTrue);
3471
3472 FcConfigSubstitute(0, fcpattern,
3473 FcMatchPattern);
3474 FcDefaultSubstitute(fcpattern);
3475
3476 fontpattern = FcFontSetMatch(0, fcsets, 1,
3477 fcpattern, &fcres);
3478
3479 /*
3480 * Overwrite or create the new cache entry.
3481 */
3482 if(frclen >= LEN(frc)) {
3483 frclen = LEN(frc) - 1;
3484 XftFontClose(xw.dpy, frc[frclen].font);
3485 frc[frclen].unicodep = 0;
3486 }
3487
3488 frc[frclen].font = XftFontOpenPattern(xw.dpy,
3489 fontpattern);
3490 frc[frclen].flags = frcflags;
3491 frc[frclen].unicodep = unicodep;
3492
3493 i = frclen;
3494 frclen++;
3495
3496 FcPatternDestroy(fcpattern);
3497 FcCharSetDestroy(fccharset);
3498 }
3499
3500 XftDrawStringUtf8(xw.draw, fg, frc[i].font,
3501 xp, winy + frc[i].font->ascent,
3502 (FcChar8 *)u8c, u8cblen);
3503
3504 xp += xw.cw * wcwidth(unicodep);
3505 }
3506
3507 /*
3508 * This is how the loop above actually should be. Why does the
3509 * application have to care about font details?
3510 *
3511 * I have to repeat: Xft and Fontconfig are design failures.
3512 */
3513 /*
3514 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
3515 winy + font->ascent, (FcChar8 *)s, bytelen);
3516 */
3517
3518 if(base.mode & ATTR_UNDERLINE) {
3519 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
3520 width, 1);
3521 }
3522
3523 if(base.mode & ATTR_STRUCK) {
3524 XftDrawRect(xw.draw, fg, winx, winy + 2 * font->ascent / 3,
3525 width, 1);
3526 }
3527
3528 /* Reset clip to none. */
3529 XftDrawSetClip(xw.draw, 0);
3530 }
3531
3532 void
3533 xdrawglyph(Glyph g, int x, int y) {
3534 static char buf[UTF_SIZ];
3535 size_t len = utf8encode(g.u, buf);
3536 int width = g.mode & ATTR_WIDE ? 2 : 1;
3537
3538 xdraws(buf, g, x, y, width, len);
3539 }
3540
3541 void
3542 xdrawcursor(void) {
3543 static int oldx = 0, oldy = 0;
3544 int curx;
3545 Glyph g = {' ', ATTR_NULL, defaultbg, defaultcs};
3546
3547 LIMIT(oldx, 0, term.col-1);
3548 LIMIT(oldy, 0, term.row-1);
3549
3550 curx = term.c.x;
3551
3552 /* adjust position if in dummy */
3553 if(term.line[oldy][oldx].mode & ATTR_WDUMMY)
3554 oldx--;
3555 if(term.line[term.c.y][curx].mode & ATTR_WDUMMY)
3556 curx--;
3557
3558 g.u = term.line[term.c.y][term.c.x].u;
3559
3560 /* remove the old cursor */
3561 xdrawglyph(term.line[oldy][oldx], oldx, oldy);
3562
3563 if(IS_SET(MODE_HIDE))
3564 return;
3565
3566 /* draw the new one */
3567 if(xw.state & WIN_FOCUSED) {
3568 switch (xw.cursor) {
3569 case 0: /* Blinking Block */
3570 case 1: /* Blinking Block (Default) */
3571 case 2: /* Steady Block */
3572 if(IS_SET(MODE_REVERSE)) {
3573 g.mode |= ATTR_REVERSE;
3574 g.fg = defaultcs;
3575 g.bg = defaultfg;
3576 }
3577
3578 g.mode |= term.line[term.c.y][curx].mode & ATTR_WIDE;
3579 xdrawglyph(g, term.c.x, term.c.y);
3580 break;
3581 case 3: /* Blinking Underline */
3582 case 4: /* Steady Underline */
3583 XftDrawRect(xw.draw, &dc.col[defaultcs],
3584 borderpx + curx * xw.cw,
3585 borderpx + (term.c.y + 1) * xw.ch - cursorthickness,
3586 xw.cw, cursorthickness);
3587 break;
3588 case 5: /* Blinking bar */
3589 case 6: /* Steady bar */
3590 XftDrawRect(xw.draw, &dc.col[defaultcs],
3591 borderpx + curx * xw.cw,
3592 borderpx + term.c.y * xw.ch,
3593 cursorthickness, xw.ch);
3594 break;
3595 }
3596 } else {
3597 XftDrawRect(xw.draw, &dc.col[defaultcs],
3598 borderpx + curx * xw.cw,
3599 borderpx + term.c.y * xw.ch,
3600 xw.cw - 1, 1);
3601 XftDrawRect(xw.draw, &dc.col[defaultcs],
3602 borderpx + curx * xw.cw,
3603 borderpx + term.c.y * xw.ch,
3604 1, xw.ch - 1);
3605 XftDrawRect(xw.draw, &dc.col[defaultcs],
3606 borderpx + (curx + 1) * xw.cw - 1,
3607 borderpx + term.c.y * xw.ch,
3608 1, xw.ch - 1);
3609 XftDrawRect(xw.draw, &dc.col[defaultcs],
3610 borderpx + curx * xw.cw,
3611 borderpx + (term.c.y + 1) * xw.ch - 1,
3612 xw.cw, 1);
3613 }
3614 oldx = curx, oldy = term.c.y;
3615 }
3616
3617
3618 void
3619 xsettitle(char *p) {
3620 XTextProperty prop;
3621
3622 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3623 &prop);
3624 XSetWMName(xw.dpy, xw.win, &prop);
3625 XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
3626 XFree(prop.value);
3627 }
3628
3629 void
3630 xresettitle(void) {
3631 xsettitle(opt_title ? opt_title : "st");
3632 }
3633
3634 void
3635 redraw(void) {
3636 tfulldirt();
3637 draw();
3638 }
3639
3640 void
3641 draw(void) {
3642 drawregion(0, 0, term.col, term.row);
3643 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3644 xw.h, 0, 0);
3645 XSetForeground(xw.dpy, dc.gc,
3646 dc.col[IS_SET(MODE_REVERSE)?
3647 defaultfg : defaultbg].pixel);
3648 }
3649
3650 void
3651 drawregion(int x1, int y1, int x2, int y2) {
3652 int ic, ib, x, y, ox;
3653 Glyph base, new;
3654 char buf[DRAW_BUF_SIZ];
3655 bool ena_sel = sel.ob.x != -1 && sel.alt == IS_SET(MODE_ALTSCREEN);
3656
3657 if(!(xw.state & WIN_VISIBLE))
3658 return;
3659
3660 for(y = y1; y < y2; y++) {
3661 if(!term.dirty[y])
3662 continue;
3663
3664 xtermclear(0, y, term.col, y);
3665 term.dirty[y] = 0;
3666 base = term.line[y][0];
3667 ic = ib = ox = 0;
3668 for(x = x1; x < x2; x++) {
3669 new = term.line[y][x];
3670 if(new.mode == ATTR_WDUMMY)
3671 continue;
3672 if(ena_sel && selected(x, y))
3673 new.mode ^= ATTR_REVERSE;
3674 if(ib > 0 && (ATTRCMP(base, new)
3675 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3676 xdraws(buf, base, ox, y, ic, ib);
3677 ic = ib = 0;
3678 }
3679 if(ib == 0) {
3680 ox = x;
3681 base = new;
3682 }
3683
3684 ib += utf8encode(new.u, buf+ib);
3685 ic += (new.mode & ATTR_WIDE)? 2 : 1;
3686 }
3687 if(ib > 0)
3688 xdraws(buf, base, ox, y, ic, ib);
3689 }
3690 xdrawcursor();
3691 }
3692
3693 void
3694 expose(XEvent *ev) {
3695 redraw();
3696 }
3697
3698 void
3699 visibility(XEvent *ev) {
3700 XVisibilityEvent *e = &ev->xvisibility;
3701
3702 MODBIT(xw.state, e->state != VisibilityFullyObscured, WIN_VISIBLE);
3703 }
3704
3705 void
3706 unmap(XEvent *ev) {
3707 xw.state &= ~WIN_VISIBLE;
3708 }
3709
3710 void
3711 xsetpointermotion(int set) {
3712 MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
3713 XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
3714 }
3715
3716 void
3717 xseturgency(int add) {
3718 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3719
3720 MODBIT(h->flags, add, XUrgencyHint);
3721 XSetWMHints(xw.dpy, xw.win, h);
3722 XFree(h);
3723 }
3724
3725 void
3726 focus(XEvent *ev) {
3727 XFocusChangeEvent *e = &ev->xfocus;
3728
3729 if(e->mode == NotifyGrab)
3730 return;
3731
3732 if(ev->type == FocusIn) {
3733 XSetICFocus(xw.xic);
3734 xw.state |= WIN_FOCUSED;
3735 xseturgency(0);
3736 if(IS_SET(MODE_FOCUS))
3737 ttywrite("\033[I", 3);
3738 } else {
3739 XUnsetICFocus(xw.xic);
3740 xw.state &= ~WIN_FOCUSED;
3741 if(IS_SET(MODE_FOCUS))
3742 ttywrite("\033[O", 3);
3743 }
3744 }
3745
3746 bool
3747 match(uint mask, uint state) {
3748 return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
3749 }
3750
3751 void
3752 numlock(const Arg *dummy) {
3753 term.numlock ^= 1;
3754 }
3755
3756 char*
3757 kmap(KeySym k, uint state) {
3758 Key *kp;
3759 int i;
3760
3761 /* Check for mapped keys out of X11 function keys. */
3762 for(i = 0; i < LEN(mappedkeys); i++) {
3763 if(mappedkeys[i] == k)
3764 break;
3765 }
3766 if(i == LEN(mappedkeys)) {
3767 if((k & 0xFFFF) < 0xFD00)
3768 return NULL;
3769 }
3770
3771 for(kp = key; kp < key + LEN(key); kp++) {
3772 if(kp->k != k)
3773 continue;
3774
3775 if(!match(kp->mask, state))
3776 continue;
3777
3778 if(IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
3779 continue;
3780 if(term.numlock && kp->appkey == 2)
3781 continue;
3782
3783 if(IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
3784 continue;
3785
3786 if(IS_SET(MODE_CRLF) ? kp->crlf < 0 : kp->crlf > 0)
3787 continue;
3788
3789 return kp->s;
3790 }
3791
3792 return NULL;
3793 }
3794
3795 void
3796 kpress(XEvent *ev) {
3797 XKeyEvent *e = &ev->xkey;
3798 KeySym ksym;
3799 char buf[32], *customkey;
3800 int len;
3801 long c;
3802 Status status;
3803 Shortcut *bp;
3804
3805 if(IS_SET(MODE_KBDLOCK))
3806 return;
3807
3808 len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
3809 /* 1. shortcuts */
3810 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3811 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3812 bp->func(&(bp->arg));
3813 return;
3814 }
3815 }
3816
3817 /* 2. custom keys from config.h */
3818 if((customkey = kmap(ksym, e->state))) {
3819 ttysend(customkey, strlen(customkey));
3820 return;
3821 }
3822
3823 /* 3. composed string from input method */
3824 if(len == 0)
3825 return;
3826 if(len == 1 && e->state & Mod1Mask) {
3827 if(IS_SET(MODE_8BIT)) {
3828 if(*buf < 0177) {
3829 c = *buf | 0x80;
3830 len = utf8encode(c, buf);
3831 }
3832 } else {
3833 buf[1] = buf[0];
3834 buf[0] = '\033';
3835 len = 2;
3836 }
3837 }
3838 ttysend(buf, len);
3839 }
3840
3841
3842 void
3843 cmessage(XEvent *e) {
3844 /*
3845 * See xembed specs
3846 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3847 */
3848 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3849 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3850 xw.state |= WIN_FOCUSED;
3851 xseturgency(0);
3852 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3853 xw.state &= ~WIN_FOCUSED;
3854 }
3855 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3856 /* Send SIGHUP to shell */
3857 kill(pid, SIGHUP);
3858 exit(EXIT_SUCCESS);
3859 }
3860 }
3861
3862 void
3863 cresize(int width, int height) {
3864 int col, row;
3865
3866 if(width != 0)
3867 xw.w = width;
3868 if(height != 0)
3869 xw.h = height;
3870
3871 col = (xw.w - 2 * borderpx) / xw.cw;
3872 row = (xw.h - 2 * borderpx) / xw.ch;
3873
3874 tresize(col, row);
3875 xresize(col, row);
3876 ttyresize();
3877 }
3878
3879 void
3880 resize(XEvent *e) {
3881 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3882 return;
3883
3884 cresize(e->xconfigure.width, e->xconfigure.height);
3885 }
3886
3887 void
3888 run(void) {
3889 XEvent ev;
3890 int w = xw.w, h = xw.h;
3891 fd_set rfd;
3892 int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3893 struct timespec drawtimeout, *tv = NULL, now, last, lastblink;
3894 long deltatime;
3895
3896 /* Waiting for window mapping */
3897 do {
3898 XNextEvent(xw.dpy, &ev);
3899 if(ev.type == ConfigureNotify) {
3900 w = ev.xconfigure.width;
3901 h = ev.xconfigure.height;
3902 }
3903 } while(ev.type != MapNotify);
3904
3905 ttynew();
3906 cresize(w, h);
3907
3908 clock_gettime(CLOCK_MONOTONIC, &last);
3909 lastblink = last;
3910
3911 for(xev = actionfps;;) {
3912 FD_ZERO(&rfd);
3913 FD_SET(cmdfd, &rfd);
3914 FD_SET(xfd, &rfd);
3915
3916 if(pselect(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv, NULL) < 0) {
3917 if(errno == EINTR)
3918 continue;
3919 die("select failed: %s\n", strerror(errno));
3920 }
3921 if(FD_ISSET(cmdfd, &rfd)) {
3922 ttyread();
3923 if(blinktimeout) {
3924 blinkset = tattrset(ATTR_BLINK);
3925 if(!blinkset)
3926 MODBIT(term.mode, 0, MODE_BLINK);
3927 }
3928 }
3929
3930 if(FD_ISSET(xfd, &rfd))
3931 xev = actionfps;
3932
3933 clock_gettime(CLOCK_MONOTONIC, &now);
3934 drawtimeout.tv_sec = 0;
3935 drawtimeout.tv_nsec = (1000 * 1E6)/ xfps;
3936 tv = &drawtimeout;
3937
3938 dodraw = 0;
3939 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
3940 tsetdirtattr(ATTR_BLINK);
3941 term.mode ^= MODE_BLINK;
3942 lastblink = now;
3943 dodraw = 1;
3944 }
3945 deltatime = TIMEDIFF(now, last);
3946 if(deltatime > 1000 / (xev ? xfps : actionfps)) {
3947 dodraw = 1;
3948 last = now;
3949 }
3950
3951 if(dodraw) {
3952 while(XPending(xw.dpy)) {
3953 XNextEvent(xw.dpy, &ev);
3954 if(XFilterEvent(&ev, None))
3955 continue;
3956 if(handler[ev.type])
3957 (handler[ev.type])(&ev);
3958 }
3959
3960 draw();
3961 XFlush(xw.dpy);
3962
3963 if(xev && !FD_ISSET(xfd, &rfd))
3964 xev--;
3965 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
3966 if(blinkset) {
3967 if(TIMEDIFF(now, lastblink) \
3968 > blinktimeout) {
3969 drawtimeout.tv_nsec = 1000;
3970 } else {
3971 drawtimeout.tv_nsec = (1E6 * \
3972 (blinktimeout - \
3973 TIMEDIFF(now,
3974 lastblink)));
3975 }
3976 drawtimeout.tv_sec = \
3977 drawtimeout.tv_nsec / 1E9;
3978 drawtimeout.tv_nsec %= (long)1E9;
3979 } else {
3980 tv = NULL;
3981 }
3982 }
3983 }
3984 }
3985 }
3986
3987 void
3988 usage(void) {
3989 die("%s " VERSION " (c) 2010-2015 st engineers\n"
3990 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]\n"
3991 " [-i] [-t title] [-w windowid] [-e command ...] [command ...]\n"
3992 " st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]\n"
3993 " [-i] [-t title] [-w windowid] [-l line] [stty_args ...]\n",
3994 argv0);
3995 }
3996
3997 int
3998 main(int argc, char *argv[]) {
3999 uint cols = 80, rows = 24;
4000
4001 xw.l = xw.t = 0;
4002 xw.isfixed = False;
4003 xw.cursor = 0;
4004
4005 ARGBEGIN {
4006 case 'a':
4007 allowaltscreen = false;
4008 break;
4009 case 'c':
4010 opt_class = EARGF(usage());
4011 break;
4012 case 'e':
4013 if(argc > 1)
4014 --argc, ++argv;
4015 goto run;
4016 case 'f':
4017 opt_font = EARGF(usage());
4018 break;
4019 case 'g':
4020 xw.gm = XParseGeometry(EARGF(usage()),
4021 &xw.l, &xw.t, &cols, &rows);
4022 break;
4023 case 'i':
4024 xw.isfixed = True;
4025 break;
4026 case 'o':
4027 opt_io = EARGF(usage());
4028 break;
4029 case 'l':
4030 opt_line = EARGF(usage());
4031 break;
4032 case 't':
4033 opt_title = EARGF(usage());
4034 break;
4035 case 'w':
4036 opt_embed = EARGF(usage());
4037 break;
4038 case 'v':
4039 default:
4040 usage();
4041 } ARGEND;
4042
4043 run:
4044 if(argc > 0) {
4045 /* eat all remaining arguments */
4046 opt_cmd = argv;
4047 if(!opt_title && !opt_line)
4048 opt_title = basename(xstrdup(argv[0]));
4049 }
4050 setlocale(LC_CTYPE, "");
4051 XSetLocaleModifiers("");
4052 tnew(MAX(cols, 1), MAX(rows, 1));
4053 xinit();
4054 selinit();
4055 run();
4056
4057 return 0;
4058 }
4059