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[st.git] / st.c
1 /* See LICENSE for licence details. */
2 #include <ctype.h>
3 #include <errno.h>
4 #include <fcntl.h>
5 #include <limits.h>
6 #include <locale.h>
7 #include <pwd.h>
8 #include <stdarg.h>
9 #include <stdbool.h>
10 #include <stdio.h>
11 #include <stdlib.h>
12 #include <string.h>
13 #include <signal.h>
14 #include <stdint.h>
15 #include <sys/ioctl.h>
16 #include <sys/select.h>
17 #include <sys/stat.h>
18 #include <sys/time.h>
19 #include <sys/types.h>
20 #include <sys/wait.h>
21 #include <time.h>
22 #include <unistd.h>
23 #include <libgen.h>
24 #include <X11/Xatom.h>
25 #include <X11/Xlib.h>
26 #include <X11/Xutil.h>
27 #include <X11/cursorfont.h>
28 #include <X11/keysym.h>
29 #include <X11/Xft/Xft.h>
30 #include <X11/XKBlib.h>
31 #include <fontconfig/fontconfig.h>
32 #include <wchar.h>
33
34 #include "arg.h"
35
36 char *argv0;
37
38 #define Glyph Glyph_
39 #define Font Font_
40
41 #if defined(__linux)
42 #include <pty.h>
43 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
44 #include <util.h>
45 #elif defined(__FreeBSD__) || defined(__DragonFly__)
46 #include <libutil.h>
47 #endif
48
49
50 /* XEMBED messages */
51 #define XEMBED_FOCUS_IN 4
52 #define XEMBED_FOCUS_OUT 5
53
54 /* Arbitrary sizes */
55 #define UTF_INVALID 0xFFFD
56 #define UTF_SIZ 4
57 #define ESC_BUF_SIZ (128*UTF_SIZ)
58 #define ESC_ARG_SIZ 16
59 #define STR_BUF_SIZ ESC_BUF_SIZ
60 #define STR_ARG_SIZ ESC_ARG_SIZ
61 #define DRAW_BUF_SIZ 20*1024
62 #define XK_ANY_MOD UINT_MAX
63 #define XK_NO_MOD 0
64 #define XK_SWITCH_MOD (1<<13)
65
66 /* macros */
67 #define MIN(a, b) ((a) < (b) ? (a) : (b))
68 #define MAX(a, b) ((a) < (b) ? (b) : (a))
69 #define LEN(a) (sizeof(a) / sizeof(a)[0])
70 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
71 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
72 #define ISCONTROLC0(c) (BETWEEN(c, 0, 0x1f) || (c) == '\177')
73 #define ISCONTROLC1(c) (BETWEEN(c, 0x80, 0x9f))
74 #define ISCONTROL(c) (ISCONTROLC0(c) || ISCONTROLC1(c))
75 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
76 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
77 #define IS_SET(flag) ((term.mode & (flag)) != 0)
78 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_nsec-t2.tv_nsec)/1E6)
79 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
80
81 #define TRUECOLOR(r,g,b) (1 << 24 | (r) << 16 | (g) << 8 | (b))
82 #define IS_TRUECOL(x) (1 << 24 & (x))
83 #define TRUERED(x) (((x) & 0xff0000) >> 8)
84 #define TRUEGREEN(x) (((x) & 0xff00))
85 #define TRUEBLUE(x) (((x) & 0xff) << 8)
86
87
88 enum glyph_attribute {
89 ATTR_NULL = 0,
90 ATTR_BOLD = 1 << 0,
91 ATTR_FAINT = 1 << 1,
92 ATTR_ITALIC = 1 << 2,
93 ATTR_UNDERLINE = 1 << 3,
94 ATTR_BLINK = 1 << 4,
95 ATTR_REVERSE = 1 << 5,
96 ATTR_INVISIBLE = 1 << 6,
97 ATTR_STRUCK = 1 << 7,
98 ATTR_WRAP = 1 << 8,
99 ATTR_WIDE = 1 << 9,
100 ATTR_WDUMMY = 1 << 10,
101 };
102
103 enum cursor_movement {
104 CURSOR_SAVE,
105 CURSOR_LOAD
106 };
107
108 enum cursor_state {
109 CURSOR_DEFAULT = 0,
110 CURSOR_WRAPNEXT = 1,
111 CURSOR_ORIGIN = 2
112 };
113
114 enum term_mode {
115 MODE_WRAP = 1 << 0,
116 MODE_INSERT = 1 << 1,
117 MODE_APPKEYPAD = 1 << 2,
118 MODE_ALTSCREEN = 1 << 3,
119 MODE_CRLF = 1 << 4,
120 MODE_MOUSEBTN = 1 << 5,
121 MODE_MOUSEMOTION = 1 << 6,
122 MODE_REVERSE = 1 << 7,
123 MODE_KBDLOCK = 1 << 8,
124 MODE_HIDE = 1 << 9,
125 MODE_ECHO = 1 << 10,
126 MODE_APPCURSOR = 1 << 11,
127 MODE_MOUSESGR = 1 << 12,
128 MODE_8BIT = 1 << 13,
129 MODE_BLINK = 1 << 14,
130 MODE_FBLINK = 1 << 15,
131 MODE_FOCUS = 1 << 16,
132 MODE_MOUSEX10 = 1 << 17,
133 MODE_MOUSEMANY = 1 << 18,
134 MODE_BRCKTPASTE = 1 << 19,
135 MODE_PRINT = 1 << 20,
136 MODE_MOUSE = MODE_MOUSEBTN|MODE_MOUSEMOTION|MODE_MOUSEX10\
137 |MODE_MOUSEMANY,
138 };
139
140 enum charset {
141 CS_GRAPHIC0,
142 CS_GRAPHIC1,
143 CS_UK,
144 CS_USA,
145 CS_MULTI,
146 CS_GER,
147 CS_FIN
148 };
149
150 enum escape_state {
151 ESC_START = 1,
152 ESC_CSI = 2,
153 ESC_STR = 4, /* DCS, OSC, PM, APC */
154 ESC_ALTCHARSET = 8,
155 ESC_STR_END = 16, /* a final string was encountered */
156 ESC_TEST = 32, /* Enter in test mode */
157 };
158
159 enum window_state {
160 WIN_VISIBLE = 1,
161 WIN_REDRAW = 2,
162 WIN_FOCUSED = 4
163 };
164
165 enum selection_type {
166 SEL_REGULAR = 1,
167 SEL_RECTANGULAR = 2
168 };
169
170 enum selection_snap {
171 SNAP_WORD = 1,
172 SNAP_LINE = 2
173 };
174
175 typedef unsigned char uchar;
176 typedef unsigned int uint;
177 typedef unsigned long ulong;
178 typedef unsigned short ushort;
179
180 typedef XftDraw *Draw;
181 typedef XftColor Color;
182
183 typedef struct {
184 char c[UTF_SIZ]; /* character code */
185 ushort mode; /* attribute flags */
186 uint32_t fg; /* foreground */
187 uint32_t bg; /* background */
188 } Glyph;
189
190 typedef Glyph *Line;
191
192 typedef struct {
193 Glyph attr; /* current char attributes */
194 int x;
195 int y;
196 char state;
197 } TCursor;
198
199 /* CSI Escape sequence structs */
200 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
201 typedef struct {
202 char buf[ESC_BUF_SIZ]; /* raw string */
203 int len; /* raw string length */
204 char priv;
205 int arg[ESC_ARG_SIZ];
206 int narg; /* nb of args */
207 char mode;
208 } CSIEscape;
209
210 /* STR Escape sequence structs */
211 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
212 typedef struct {
213 char type; /* ESC type ... */
214 char buf[STR_BUF_SIZ]; /* raw string */
215 int len; /* raw string length */
216 char *args[STR_ARG_SIZ];
217 int narg; /* nb of args */
218 } STREscape;
219
220 /* Internal representation of the screen */
221 typedef struct {
222 int row; /* nb row */
223 int col; /* nb col */
224 Line *line; /* screen */
225 Line *alt; /* alternate screen */
226 bool *dirty; /* dirtyness of lines */
227 TCursor c; /* cursor */
228 int top; /* top scroll limit */
229 int bot; /* bottom scroll limit */
230 int mode; /* terminal mode flags */
231 int esc; /* escape state flags */
232 char trantbl[4]; /* charset table translation */
233 int charset; /* current charset */
234 int icharset; /* selected charset for sequence */
235 bool numlock; /* lock numbers in keyboard */
236 bool *tabs;
237 } Term;
238
239 /* Purely graphic info */
240 typedef struct {
241 Display *dpy;
242 Colormap cmap;
243 Window win;
244 Drawable buf;
245 Atom xembed, wmdeletewin, netwmname, netwmpid;
246 XIM xim;
247 XIC xic;
248 Draw draw;
249 Visual *vis;
250 XSetWindowAttributes attrs;
251 int scr;
252 bool isfixed; /* is fixed geometry? */
253 int l, t; /* left and top offset */
254 int gm; /* geometry mask */
255 int tw, th; /* tty width and height */
256 int w, h; /* window width and height */
257 int ch; /* char height */
258 int cw; /* char width */
259 char state; /* focus, redraw, visible */
260 } XWindow;
261
262 typedef struct {
263 uint b;
264 uint mask;
265 char *s;
266 } Mousekey;
267
268 typedef struct {
269 KeySym k;
270 uint mask;
271 char *s;
272 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
273 signed char appkey; /* application keypad */
274 signed char appcursor; /* application cursor */
275 signed char crlf; /* crlf mode */
276 } Key;
277
278 typedef struct {
279 int mode;
280 int type;
281 int snap;
282 /*
283 * Selection variables:
284 * nb – normalized coordinates of the beginning of the selection
285 * ne – normalized coordinates of the end of the selection
286 * ob – original coordinates of the beginning of the selection
287 * oe – original coordinates of the end of the selection
288 */
289 struct {
290 int x, y;
291 } nb, ne, ob, oe;
292
293 char *primary, *clipboard;
294 Atom xtarget;
295 bool alt;
296 struct timespec tclick1;
297 struct timespec tclick2;
298 } Selection;
299
300 typedef union {
301 int i;
302 uint ui;
303 float f;
304 const void *v;
305 } Arg;
306
307 typedef struct {
308 uint mod;
309 KeySym keysym;
310 void (*func)(const Arg *);
311 const Arg arg;
312 } Shortcut;
313
314 /* function definitions used in config.h */
315 static void clipcopy(const Arg *);
316 static void clippaste(const Arg *);
317 static void numlock(const Arg *);
318 static void selpaste(const Arg *);
319 static void xzoom(const Arg *);
320 static void xzoomabs(const Arg *);
321 static void xzoomreset(const Arg *);
322 static void printsel(const Arg *);
323 static void printscreen(const Arg *) ;
324 static void toggleprinter(const Arg *);
325
326 /* Config.h for applying patches and the configuration. */
327 #include "config.h"
328
329 /* Font structure */
330 typedef struct {
331 int height;
332 int width;
333 int ascent;
334 int descent;
335 short lbearing;
336 short rbearing;
337 XftFont *match;
338 FcFontSet *set;
339 FcPattern *pattern;
340 } Font;
341
342 /* Drawing Context */
343 typedef struct {
344 Color col[MAX(LEN(colorname), 256)];
345 Font font, bfont, ifont, ibfont;
346 GC gc;
347 } DC;
348
349 static void die(const char *, ...);
350 static void draw(void);
351 static void redraw(void);
352 static void drawregion(int, int, int, int);
353 static void execsh(void);
354 static void sigchld(int);
355 static void run(void);
356
357 static void csidump(void);
358 static void csihandle(void);
359 static void csiparse(void);
360 static void csireset(void);
361 static int eschandle(uchar ascii);
362 static void strdump(void);
363 static void strhandle(void);
364 static void strparse(void);
365 static void strreset(void);
366
367 static int tattrset(int);
368 static void tprinter(char *, size_t);
369 static void tdumpsel(void);
370 static void tdumpline(int);
371 static void tdump(void);
372 static void tclearregion(int, int, int, int);
373 static void tcursor(int);
374 static void tdeletechar(int);
375 static void tdeleteline(int);
376 static void tinsertblank(int);
377 static void tinsertblankline(int);
378 static int tlinelen(int);
379 static void tmoveto(int, int);
380 static void tmoveato(int, int);
381 static void tnew(int, int);
382 static void tnewline(int);
383 static void tputtab(int);
384 static void tputc(char *, int);
385 static void treset(void);
386 static void tresize(int, int);
387 static void tscrollup(int, int);
388 static void tscrolldown(int, int);
389 static void tsetattr(int *, int);
390 static void tsetchar(char *, Glyph *, int, int);
391 static void tsetscroll(int, int);
392 static void tswapscreen(void);
393 static void tsetdirt(int, int);
394 static void tsetdirtattr(int);
395 static void tsetmode(bool, bool, int *, int);
396 static void tfulldirt(void);
397 static void techo(char *, int);
398 static void tcontrolcode(uchar );
399 static void tdectest(char );
400 static int32_t tdefcolor(int *, int *, int);
401 static void tdeftran(char);
402 static inline bool match(uint, uint);
403 static void ttynew(void);
404 static void ttyread(void);
405 static void ttyresize(void);
406 static void ttysend(char *, size_t);
407 static void ttywrite(const char *, size_t);
408 static void tstrsequence(uchar c);
409
410 static void xdraws(char *, Glyph, int, int, int, int);
411 static void xhints(void);
412 static void xclear(int, int, int, int);
413 static void xdrawcursor(void);
414 static void xinit(void);
415 static void xloadcols(void);
416 static int xsetcolorname(int, const char *);
417 static int xgeommasktogravity(int);
418 static int xloadfont(Font *, FcPattern *);
419 static void xloadfonts(char *, double);
420 static int xloadfontset(Font *);
421 static void xsettitle(char *);
422 static void xresettitle(void);
423 static void xsetpointermotion(int);
424 static void xseturgency(int);
425 static void xsetsel(char *);
426 static void xtermclear(int, int, int, int);
427 static void xunloadfont(Font *);
428 static void xunloadfonts(void);
429 static void xresize(int, int);
430
431 static void expose(XEvent *);
432 static void visibility(XEvent *);
433 static void unmap(XEvent *);
434 static char *kmap(KeySym, uint);
435 static void kpress(XEvent *);
436 static void cmessage(XEvent *);
437 static void cresize(int, int);
438 static void resize(XEvent *);
439 static void focus(XEvent *);
440 static void brelease(XEvent *);
441 static void bpress(XEvent *);
442 static void bmotion(XEvent *);
443 static void selnotify(XEvent *);
444 static void selclear(XEvent *);
445 static void selrequest(XEvent *);
446
447 static void selinit(void);
448 static void selnormalize(void);
449 static inline bool selected(int, int);
450 static char *getsel(void);
451 static void selcopy(void);
452 static void selscroll(int, int);
453 static void selsnap(int, int *, int *, int);
454 static void getbuttoninfo(XEvent *);
455 static void mousereport(XEvent *);
456
457 static size_t utf8decode(char *, long *, size_t);
458 static long utf8decodebyte(char, size_t *);
459 static size_t utf8encode(long, char *, size_t);
460 static char utf8encodebyte(long, size_t);
461 static size_t utf8len(char *);
462 static size_t utf8validate(long *, size_t);
463
464 static ssize_t xwrite(int, const char *, size_t);
465 static void *xmalloc(size_t);
466 static void *xrealloc(void *, size_t);
467 static char *xstrdup(char *);
468
469 static void usage(void);
470
471 static void (*handler[LASTEvent])(XEvent *) = {
472 [KeyPress] = kpress,
473 [ClientMessage] = cmessage,
474 [ConfigureNotify] = resize,
475 [VisibilityNotify] = visibility,
476 [UnmapNotify] = unmap,
477 [Expose] = expose,
478 [FocusIn] = focus,
479 [FocusOut] = focus,
480 [MotionNotify] = bmotion,
481 [ButtonPress] = bpress,
482 [ButtonRelease] = brelease,
483 /*
484 * Uncomment if you want the selection to disappear when you select something
485 * different in another window.
486 */
487 /* [SelectionClear] = selclear, */
488 [SelectionNotify] = selnotify,
489 [SelectionRequest] = selrequest,
490 };
491
492 /* Globals */
493 static DC dc;
494 static XWindow xw;
495 static Term term;
496 static CSIEscape csiescseq;
497 static STREscape strescseq;
498 static int cmdfd;
499 static pid_t pid;
500 static Selection sel;
501 static int iofd = STDOUT_FILENO;
502 static char **opt_cmd = NULL;
503 static char *opt_io = NULL;
504 static char *opt_title = NULL;
505 static char *opt_embed = NULL;
506 static char *opt_class = NULL;
507 static char *opt_font = NULL;
508 static int oldbutton = 3; /* button event on startup: 3 = release */
509
510 static char *usedfont = NULL;
511 static double usedfontsize = 0;
512 static double defaultfontsize = 0;
513
514 static uchar utfbyte[UTF_SIZ + 1] = {0x80, 0, 0xC0, 0xE0, 0xF0};
515 static uchar utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
516 static long utfmin[UTF_SIZ + 1] = { 0, 0, 0x80, 0x800, 0x10000};
517 static long utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
518
519 /* Font Ring Cache */
520 enum {
521 FRC_NORMAL,
522 FRC_ITALIC,
523 FRC_BOLD,
524 FRC_ITALICBOLD
525 };
526
527 typedef struct {
528 XftFont *font;
529 int flags;
530 long unicodep;
531 } Fontcache;
532
533 /* Fontcache is an array now. A new font will be appended to the array. */
534 static Fontcache frc[16];
535 static int frclen = 0;
536
537 ssize_t
538 xwrite(int fd, const char *s, size_t len) {
539 size_t aux = len;
540
541 while(len > 0) {
542 ssize_t r = write(fd, s, len);
543 if(r < 0)
544 return r;
545 len -= r;
546 s += r;
547 }
548 return aux;
549 }
550
551 void *
552 xmalloc(size_t len) {
553 void *p = malloc(len);
554
555 if(!p)
556 die("Out of memory\n");
557
558 return p;
559 }
560
561 void *
562 xrealloc(void *p, size_t len) {
563 if((p = realloc(p, len)) == NULL)
564 die("Out of memory\n");
565
566 return p;
567 }
568
569 char *
570 xstrdup(char *s) {
571 if((s = strdup(s)) == NULL)
572 die("Out of memory\n");
573
574 return s;
575 }
576
577 size_t
578 utf8decode(char *c, long *u, size_t clen) {
579 size_t i, j, len, type;
580 long udecoded;
581
582 *u = UTF_INVALID;
583 if(!clen)
584 return 0;
585 udecoded = utf8decodebyte(c[0], &len);
586 if(!BETWEEN(len, 1, UTF_SIZ))
587 return 1;
588 for(i = 1, j = 1; i < clen && j < len; ++i, ++j) {
589 udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
590 if(type != 0)
591 return j;
592 }
593 if(j < len)
594 return 0;
595 *u = udecoded;
596 utf8validate(u, len);
597 return len;
598 }
599
600 long
601 utf8decodebyte(char c, size_t *i) {
602 for(*i = 0; *i < LEN(utfmask); ++(*i))
603 if(((uchar)c & utfmask[*i]) == utfbyte[*i])
604 return (uchar)c & ~utfmask[*i];
605 return 0;
606 }
607
608 size_t
609 utf8encode(long u, char *c, size_t clen) {
610 size_t len, i;
611
612 len = utf8validate(&u, 0);
613 if(clen < len)
614 return 0;
615 for(i = len - 1; i != 0; --i) {
616 c[i] = utf8encodebyte(u, 0);
617 u >>= 6;
618 }
619 c[0] = utf8encodebyte(u, len);
620 return len;
621 }
622
623 char
624 utf8encodebyte(long u, size_t i) {
625 return utfbyte[i] | (u & ~utfmask[i]);
626 }
627
628 size_t
629 utf8len(char *c) {
630 return utf8decode(c, &(long){0}, UTF_SIZ);
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 static 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 static int
656 x2col(int x) {
657 x -= borderpx;
658 x /= xw.cw;
659
660 return LIMIT(x, 0, term.col-1);
661 }
662
663 static int
664 y2row(int y) {
665 y -= borderpx;
666 y /= xw.ch;
667
668 return LIMIT(y, 0, term.row-1);
669 }
670
671 static int tlinelen(int y) {
672 int i = term.col;
673
674 if(term.line[y][i - 1].mode & ATTR_WRAP)
675 return i;
676
677 while(i > 0 && term.line[y][i - 1].c[0] == ' ')
678 --i;
679
680 return i;
681 }
682
683 static void
684 selnormalize(void) {
685 int i;
686
687 if(sel.ob.y == sel.oe.y || sel.type == SEL_RECTANGULAR) {
688 sel.nb.x = MIN(sel.ob.x, sel.oe.x);
689 sel.ne.x = MAX(sel.ob.x, sel.oe.x);
690 } else {
691 sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
692 sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
693 }
694 sel.nb.y = MIN(sel.ob.y, sel.oe.y);
695 sel.ne.y = MAX(sel.ob.y, sel.oe.y);
696
697 selsnap(sel.snap, &sel.nb.x, &sel.nb.y, -1);
698 selsnap(sel.snap, &sel.ne.x, &sel.ne.y, +1);
699
700 /* expand selection over line breaks */
701 if (sel.type == SEL_RECTANGULAR)
702 return;
703 i = tlinelen(sel.nb.y);
704 if (i < sel.nb.x)
705 sel.nb.x = i;
706 if (tlinelen(sel.ne.y) <= sel.ne.x)
707 sel.ne.x = term.col - 1;
708 }
709
710 static inline bool
711 selected(int x, int y) {
712 if(sel.type == SEL_RECTANGULAR)
713 return BETWEEN(y, sel.nb.y, sel.ne.y)
714 && BETWEEN(x, sel.nb.x, sel.ne.x);
715
716 return BETWEEN(y, sel.nb.y, sel.ne.y)
717 && (y != sel.nb.y || x >= sel.nb.x)
718 && (y != sel.ne.y || x <= sel.ne.x);
719 }
720
721 void
722 selsnap(int mode, int *x, int *y, int direction) {
723 int newx, newy, xt, yt;
724 bool delim, prevdelim;
725 Glyph *gp, *prevgp;
726
727 switch(mode) {
728 case SNAP_WORD:
729 /*
730 * Snap around if the word wraps around at the end or
731 * beginning of a line.
732 */
733 prevgp = &term.line[*y][*x];
734 prevdelim = strchr(worddelimiters, prevgp->c[0]) != NULL;
735 for(;;) {
736 newx = *x + direction;
737 newy = *y;
738 if(!BETWEEN(newx, 0, term.col - 1)) {
739 newy += direction;
740 newx = (newx + term.col) % term.col;
741 if (!BETWEEN(newy, 0, term.row - 1))
742 break;
743
744 if(direction > 0)
745 yt = *y, xt = *x;
746 else
747 yt = newy, xt = newx;
748 if(!(term.line[yt][xt].mode & ATTR_WRAP))
749 break;
750 }
751
752 if (newx >= tlinelen(newy))
753 break;
754
755 gp = &term.line[newy][newx];
756 delim = strchr(worddelimiters, gp->c[0]) != NULL;
757 if(!(gp->mode & ATTR_WDUMMY) && (delim != prevdelim
758 || (delim && gp->c[0] != prevgp->c[0])))
759 break;
760
761 *x = newx;
762 *y = newy;
763 prevgp = gp;
764 prevdelim = delim;
765 }
766 break;
767 case SNAP_LINE:
768 /*
769 * Snap around if the the previous line or the current one
770 * has set ATTR_WRAP at its end. Then the whole next or
771 * previous line will be selected.
772 */
773 *x = (direction < 0) ? 0 : term.col - 1;
774 if(direction < 0 && *y > 0) {
775 for(; *y > 0; *y += direction) {
776 if(!(term.line[*y-1][term.col-1].mode
777 & ATTR_WRAP)) {
778 break;
779 }
780 }
781 } else if(direction > 0 && *y < term.row-1) {
782 for(; *y < term.row; *y += direction) {
783 if(!(term.line[*y][term.col-1].mode
784 & ATTR_WRAP)) {
785 break;
786 }
787 }
788 }
789 break;
790 }
791 }
792
793 void
794 getbuttoninfo(XEvent *e) {
795 int type;
796 uint state = e->xbutton.state & ~(Button1Mask | forceselmod);
797
798 sel.alt = IS_SET(MODE_ALTSCREEN);
799
800 sel.oe.x = x2col(e->xbutton.x);
801 sel.oe.y = y2row(e->xbutton.y);
802 selnormalize();
803
804 sel.type = SEL_REGULAR;
805 for(type = 1; type < LEN(selmasks); ++type) {
806 if(match(selmasks[type], state)) {
807 sel.type = type;
808 break;
809 }
810 }
811 }
812
813 void
814 mousereport(XEvent *e) {
815 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
816 button = e->xbutton.button, state = e->xbutton.state,
817 len;
818 char buf[40];
819 static int ox, oy;
820
821 /* from urxvt */
822 if(e->xbutton.type == MotionNotify) {
823 if(x == ox && y == oy)
824 return;
825 if(!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
826 return;
827 /* MOUSE_MOTION: no reporting if no button is pressed */
828 if(IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
829 return;
830
831 button = oldbutton + 32;
832 ox = x;
833 oy = y;
834 } else {
835 if(!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
836 button = 3;
837 } else {
838 button -= Button1;
839 if(button >= 3)
840 button += 64 - 3;
841 }
842 if(e->xbutton.type == ButtonPress) {
843 oldbutton = button;
844 ox = x;
845 oy = y;
846 } else if(e->xbutton.type == ButtonRelease) {
847 oldbutton = 3;
848 /* MODE_MOUSEX10: no button release reporting */
849 if(IS_SET(MODE_MOUSEX10))
850 return;
851 if (button == 64 || button == 65)
852 return;
853 }
854 }
855
856 if(!IS_SET(MODE_MOUSEX10)) {
857 button += (state & ShiftMask ? 4 : 0)
858 + (state & Mod4Mask ? 8 : 0)
859 + (state & ControlMask ? 16 : 0);
860 }
861
862 len = 0;
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, size, 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 + 1; 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->c[0] == ' ')
956 --last;
957
958 for( ; gp <= last; ++gp) {
959 if(gp->mode & ATTR_WDUMMY)
960 continue;
961
962 size = utf8len(gp->c);
963 memcpy(ptr, gp->c, size);
964 ptr += size;
965 }
966
967 /*
968 * Copy and pasting of line endings is inconsistent
969 * in the inconsistent terminal and GUI world.
970 * The best solution seems like to produce '\n' when
971 * something is copied from st and convert '\n' to
972 * '\r', when something to be pasted is received by
973 * st.
974 * FIXME: Fix the computer world.
975 */
976 if((y < sel.ne.y || lastx >= linelen) && !(last->mode & ATTR_WRAP))
977 *ptr++ = '\n';
978 }
979 *ptr = 0;
980 return str;
981 }
982
983 void
984 selcopy(void) {
985 xsetsel(getsel());
986 }
987
988 void
989 selnotify(XEvent *e) {
990 ulong nitems, ofs, rem;
991 int format;
992 uchar *data, *last, *repl;
993 Atom type;
994 XSelectionEvent *xsev;
995
996 ofs = 0;
997 xsev = (XSelectionEvent *)e;
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 /* reject */
1082 xev.property = None;
1083
1084 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
1085 if(xsre->target == xa_targets) {
1086 /* respond with the supported type */
1087 string = sel.xtarget;
1088 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1089 XA_ATOM, 32, PropModeReplace,
1090 (uchar *) &string, 1);
1091 xev.property = xsre->property;
1092 } else if(xsre->target == sel.xtarget || xsre->target == XA_STRING) {
1093 /*
1094 * xith XA_STRING non ascii characters may be incorrect in the
1095 * requestor. It is not our problem, use utf8.
1096 */
1097 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1098 if(xsre->selection == XA_PRIMARY) {
1099 seltext = sel.primary;
1100 } else if(xsre->selection == clipboard) {
1101 seltext = sel.clipboard;
1102 } else {
1103 fprintf(stderr,
1104 "Unhandled clipboard selection 0x%lx\n",
1105 xsre->selection);
1106 return;
1107 }
1108 if(seltext != NULL) {
1109 XChangeProperty(xsre->display, xsre->requestor,
1110 xsre->property, xsre->target,
1111 8, PropModeReplace,
1112 (uchar *)seltext, strlen(seltext));
1113 xev.property = xsre->property;
1114 }
1115 }
1116
1117 /* all done, send a notification to the listener */
1118 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
1119 fprintf(stderr, "Error sending SelectionNotify event\n");
1120 }
1121
1122 void
1123 xsetsel(char *str) {
1124 free(sel.primary);
1125 sel.primary = str;
1126
1127 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
1128 }
1129
1130 void
1131 brelease(XEvent *e) {
1132 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1133 mousereport(e);
1134 return;
1135 }
1136
1137 if(e->xbutton.button == Button2) {
1138 selpaste(NULL);
1139 } else if(e->xbutton.button == Button1) {
1140 if(sel.mode < 2) {
1141 selclear(NULL);
1142 } else {
1143 getbuttoninfo(e);
1144 selcopy();
1145 }
1146 sel.mode = 0;
1147 tsetdirt(sel.nb.y, sel.ne.y);
1148 }
1149 }
1150
1151 void
1152 bmotion(XEvent *e) {
1153 int oldey, oldex, oldsby, oldsey;
1154
1155 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1156 mousereport(e);
1157 return;
1158 }
1159
1160 if(!sel.mode)
1161 return;
1162
1163 sel.mode++;
1164 oldey = sel.oe.y;
1165 oldex = sel.oe.x;
1166 oldsby = sel.nb.y;
1167 oldsey = sel.ne.y;
1168 getbuttoninfo(e);
1169
1170 if(oldey != sel.oe.y || oldex != sel.oe.x)
1171 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
1172 }
1173
1174 void
1175 die(const char *errstr, ...) {
1176 va_list ap;
1177
1178 va_start(ap, errstr);
1179 vfprintf(stderr, errstr, ap);
1180 va_end(ap);
1181 exit(EXIT_FAILURE);
1182 }
1183
1184 void
1185 execsh(void) {
1186 char **args, *sh, *prog;
1187 const struct passwd *pw;
1188 char buf[sizeof(long) * 8 + 1];
1189
1190 errno = 0;
1191 if((pw = getpwuid(getuid())) == NULL) {
1192 if(errno)
1193 die("getpwuid:%s\n", strerror(errno));
1194 else
1195 die("who are you?\n");
1196 }
1197
1198 if (!(sh = getenv("SHELL"))) {
1199 sh = (pw->pw_shell[0]) ? pw->pw_shell : shell;
1200 }
1201
1202 if(opt_cmd)
1203 prog = opt_cmd[0];
1204 else if(utmp)
1205 prog = utmp;
1206 else
1207 prog = sh;
1208 args = (opt_cmd) ? opt_cmd : (char *[]) {prog, NULL};
1209
1210 snprintf(buf, sizeof(buf), "%lu", xw.win);
1211
1212 unsetenv("COLUMNS");
1213 unsetenv("LINES");
1214 unsetenv("TERMCAP");
1215 setenv("LOGNAME", pw->pw_name, 1);
1216 setenv("USER", pw->pw_name, 1);
1217 setenv("SHELL", sh, 1);
1218 setenv("HOME", pw->pw_dir, 1);
1219 setenv("TERM", termname, 1);
1220 setenv("WINDOWID", buf, 1);
1221
1222 signal(SIGCHLD, SIG_DFL);
1223 signal(SIGHUP, SIG_DFL);
1224 signal(SIGINT, SIG_DFL);
1225 signal(SIGQUIT, SIG_DFL);
1226 signal(SIGTERM, SIG_DFL);
1227 signal(SIGALRM, SIG_DFL);
1228
1229 execvp(prog, args);
1230 _exit(EXIT_FAILURE);
1231 }
1232
1233 void
1234 sigchld(int a) {
1235 int stat, ret;
1236
1237 if(waitpid(pid, &stat, 0) < 0)
1238 die("Waiting for pid %hd failed: %s\n", pid, strerror(errno));
1239
1240 ret = WIFEXITED(stat) ? WEXITSTATUS(stat) : EXIT_FAILURE;
1241 if (ret != EXIT_SUCCESS)
1242 die("child finished with error '%d'\n", stat);
1243 exit(EXIT_SUCCESS);
1244 }
1245
1246 void
1247 ttynew(void) {
1248 int m, s;
1249 struct winsize w = {term.row, term.col, 0, 0};
1250
1251 /* seems to work fine on linux, openbsd and freebsd */
1252 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1253 die("openpty failed: %s\n", strerror(errno));
1254
1255 switch(pid = fork()) {
1256 case -1:
1257 die("fork failed\n");
1258 break;
1259 case 0:
1260 setsid(); /* create a new process group */
1261 dup2(s, STDIN_FILENO);
1262 dup2(s, STDOUT_FILENO);
1263 dup2(s, STDERR_FILENO);
1264 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1265 die("ioctl TIOCSCTTY failed: %s\n", strerror(errno));
1266 close(s);
1267 close(m);
1268 execsh();
1269 break;
1270 default:
1271 close(s);
1272 cmdfd = m;
1273 signal(SIGCHLD, sigchld);
1274 if(opt_io) {
1275 term.mode |= MODE_PRINT;
1276 iofd = (!strcmp(opt_io, "-")) ?
1277 STDOUT_FILENO :
1278 open(opt_io, O_WRONLY | O_CREAT, 0666);
1279 if(iofd < 0) {
1280 fprintf(stderr, "Error opening %s:%s\n",
1281 opt_io, strerror(errno));
1282 }
1283 }
1284 break;
1285 }
1286 }
1287
1288 void
1289 ttyread(void) {
1290 static char buf[BUFSIZ];
1291 static int buflen = 0;
1292 char *ptr;
1293 char s[UTF_SIZ];
1294 int charsize; /* size of utf8 char in bytes */
1295 long unicodep;
1296 int ret;
1297
1298 /* append read bytes to unprocessed bytes */
1299 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1300 die("Couldn't read from shell: %s\n", strerror(errno));
1301
1302 /* process every complete utf8 char */
1303 buflen += ret;
1304 ptr = buf;
1305 while((charsize = utf8decode(ptr, &unicodep, buflen))) {
1306 utf8encode(unicodep, s, UTF_SIZ);
1307 tputc(s, charsize);
1308 ptr += charsize;
1309 buflen -= charsize;
1310 }
1311
1312 /* keep any uncomplete utf8 char for the next call */
1313 memmove(buf, ptr, buflen);
1314 }
1315
1316 void
1317 ttywrite(const char *s, size_t n) {
1318 if(xwrite(cmdfd, s, n) == -1)
1319 die("write error on tty: %s\n", strerror(errno));
1320 }
1321
1322 void
1323 ttysend(char *s, size_t n) {
1324 ttywrite(s, n);
1325 if(IS_SET(MODE_ECHO))
1326 techo(s, n);
1327 }
1328
1329 void
1330 ttyresize(void) {
1331 struct winsize w;
1332
1333 w.ws_row = term.row;
1334 w.ws_col = term.col;
1335 w.ws_xpixel = xw.tw;
1336 w.ws_ypixel = xw.th;
1337 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1338 fprintf(stderr, "Couldn't set window size: %s\n", strerror(errno));
1339 }
1340
1341 int
1342 tattrset(int attr) {
1343 int i, j;
1344
1345 for(i = 0; i < term.row-1; i++) {
1346 for(j = 0; j < term.col-1; j++) {
1347 if(term.line[i][j].mode & attr)
1348 return 1;
1349 }
1350 }
1351
1352 return 0;
1353 }
1354
1355 void
1356 tsetdirt(int top, int bot) {
1357 int i;
1358
1359 LIMIT(top, 0, term.row-1);
1360 LIMIT(bot, 0, term.row-1);
1361
1362 for(i = top; i <= bot; i++)
1363 term.dirty[i] = 1;
1364 }
1365
1366 void
1367 tsetdirtattr(int attr) {
1368 int i, j;
1369
1370 for(i = 0; i < term.row-1; i++) {
1371 for(j = 0; j < term.col-1; j++) {
1372 if(term.line[i][j].mode & attr) {
1373 tsetdirt(i, i);
1374 break;
1375 }
1376 }
1377 }
1378 }
1379
1380 void
1381 tfulldirt(void) {
1382 tsetdirt(0, term.row-1);
1383 }
1384
1385 void
1386 tcursor(int mode) {
1387 static TCursor c[2];
1388 bool alt = IS_SET(MODE_ALTSCREEN);
1389
1390 if(mode == CURSOR_SAVE) {
1391 c[alt] = term.c;
1392 } else if(mode == CURSOR_LOAD) {
1393 term.c = c[alt];
1394 tmoveto(c[alt].x, c[alt].y);
1395 }
1396 }
1397
1398 void
1399 treset(void) {
1400 uint i;
1401
1402 term.c = (TCursor){{
1403 .mode = ATTR_NULL,
1404 .fg = defaultfg,
1405 .bg = defaultbg
1406 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1407
1408 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1409 for(i = tabspaces; i < term.col; i += tabspaces)
1410 term.tabs[i] = 1;
1411 term.top = 0;
1412 term.bot = term.row - 1;
1413 term.mode = MODE_WRAP;
1414 memset(term.trantbl, sizeof(term.trantbl), CS_USA);
1415 term.charset = 0;
1416
1417 for(i = 0; i < 2; i++) {
1418 tmoveto(0, 0);
1419 tcursor(CURSOR_SAVE);
1420 tclearregion(0, 0, term.col-1, term.row-1);
1421 tswapscreen();
1422 }
1423 }
1424
1425 void
1426 tnew(int col, int row) {
1427 term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } };
1428 tresize(col, row);
1429 term.numlock = 1;
1430
1431 treset();
1432 }
1433
1434 void
1435 tswapscreen(void) {
1436 Line *tmp = term.line;
1437
1438 term.line = term.alt;
1439 term.alt = tmp;
1440 term.mode ^= MODE_ALTSCREEN;
1441 tfulldirt();
1442 }
1443
1444 void
1445 tscrolldown(int orig, int n) {
1446 int i;
1447 Line temp;
1448
1449 LIMIT(n, 0, term.bot-orig+1);
1450
1451 tsetdirt(orig, term.bot-n);
1452 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1453
1454 for(i = term.bot; i >= orig+n; i--) {
1455 temp = term.line[i];
1456 term.line[i] = term.line[i-n];
1457 term.line[i-n] = temp;
1458 }
1459
1460 selscroll(orig, n);
1461 }
1462
1463 void
1464 tscrollup(int orig, int n) {
1465 int i;
1466 Line temp;
1467
1468 LIMIT(n, 0, term.bot-orig+1);
1469
1470 tclearregion(0, orig, term.col-1, orig+n-1);
1471 tsetdirt(orig+n, term.bot);
1472
1473 for(i = orig; i <= term.bot-n; i++) {
1474 temp = term.line[i];
1475 term.line[i] = term.line[i+n];
1476 term.line[i+n] = temp;
1477 }
1478
1479 selscroll(orig, -n);
1480 }
1481
1482 void
1483 selscroll(int orig, int n) {
1484 if(sel.ob.x == -1)
1485 return;
1486
1487 if(BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
1488 if((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
1489 selclear(NULL);
1490 return;
1491 }
1492 if(sel.type == SEL_RECTANGULAR) {
1493 if(sel.ob.y < term.top)
1494 sel.ob.y = term.top;
1495 if(sel.oe.y > term.bot)
1496 sel.oe.y = term.bot;
1497 } else {
1498 if(sel.ob.y < term.top) {
1499 sel.ob.y = term.top;
1500 sel.ob.x = 0;
1501 }
1502 if(sel.oe.y > term.bot) {
1503 sel.oe.y = term.bot;
1504 sel.oe.x = term.col;
1505 }
1506 }
1507 selnormalize();
1508 }
1509 }
1510
1511 void
1512 tnewline(int first_col) {
1513 int y = term.c.y;
1514
1515 if(y == term.bot) {
1516 tscrollup(term.top, 1);
1517 } else {
1518 y++;
1519 }
1520 tmoveto(first_col ? 0 : term.c.x, y);
1521 }
1522
1523 void
1524 csiparse(void) {
1525 char *p = csiescseq.buf, *np;
1526 long int v;
1527
1528 csiescseq.narg = 0;
1529 if(*p == '?') {
1530 csiescseq.priv = 1;
1531 p++;
1532 }
1533
1534 csiescseq.buf[csiescseq.len] = '\0';
1535 while(p < csiescseq.buf+csiescseq.len) {
1536 np = NULL;
1537 v = strtol(p, &np, 10);
1538 if(np == p)
1539 v = 0;
1540 if(v == LONG_MAX || v == LONG_MIN)
1541 v = -1;
1542 csiescseq.arg[csiescseq.narg++] = v;
1543 p = np;
1544 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1545 break;
1546 p++;
1547 }
1548 csiescseq.mode = *p;
1549 }
1550
1551 /* for absolute user moves, when decom is set */
1552 void
1553 tmoveato(int x, int y) {
1554 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1555 }
1556
1557 void
1558 tmoveto(int x, int y) {
1559 int miny, maxy;
1560
1561 if(term.c.state & CURSOR_ORIGIN) {
1562 miny = term.top;
1563 maxy = term.bot;
1564 } else {
1565 miny = 0;
1566 maxy = term.row - 1;
1567 }
1568 LIMIT(x, 0, term.col-1);
1569 LIMIT(y, miny, maxy);
1570 term.c.state &= ~CURSOR_WRAPNEXT;
1571 term.c.x = x;
1572 term.c.y = y;
1573 }
1574
1575 void
1576 tsetchar(char *c, Glyph *attr, int x, int y) {
1577 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1578 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1579 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1580 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1581 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1582 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1583 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1584 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1585 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1586 };
1587
1588 /*
1589 * The table is proudly stolen from rxvt.
1590 */
1591 if(term.trantbl[term.charset] == CS_GRAPHIC0) {
1592 if(BETWEEN(c[0], 0x41, 0x7e) && vt100_0[c[0] - 0x41]) {
1593 c = vt100_0[c[0] - 0x41];
1594 }
1595 }
1596
1597 if(term.line[y][x].mode & ATTR_WIDE) {
1598 if(x+1 < term.col) {
1599 term.line[y][x+1].c[0] = ' ';
1600 term.line[y][x+1].mode &= ~ATTR_WDUMMY;
1601 }
1602 } else if(term.line[y][x].mode & ATTR_WDUMMY) {
1603 term.line[y][x-1].c[0] = ' ';
1604 term.line[y][x-1].mode &= ~ATTR_WIDE;
1605 }
1606
1607 term.dirty[y] = 1;
1608 term.line[y][x] = *attr;
1609 memcpy(term.line[y][x].c, c, UTF_SIZ);
1610 }
1611
1612 void
1613 tclearregion(int x1, int y1, int x2, int y2) {
1614 int x, y, temp;
1615 Glyph *gp;
1616
1617 if(x1 > x2)
1618 temp = x1, x1 = x2, x2 = temp;
1619 if(y1 > y2)
1620 temp = y1, y1 = y2, y2 = temp;
1621
1622 LIMIT(x1, 0, term.col-1);
1623 LIMIT(x2, 0, term.col-1);
1624 LIMIT(y1, 0, term.row-1);
1625 LIMIT(y2, 0, term.row-1);
1626
1627 for(y = y1; y <= y2; y++) {
1628 term.dirty[y] = 1;
1629 for(x = x1; x <= x2; x++) {
1630 gp = &term.line[y][x];
1631 if(selected(x, y))
1632 selclear(NULL);
1633 gp->fg = term.c.attr.fg;
1634 gp->bg = term.c.attr.bg;
1635 gp->mode = 0;
1636 memcpy(gp->c, " ", 2);
1637 }
1638 }
1639 }
1640
1641 void
1642 tdeletechar(int n) {
1643 int dst, src, size;
1644 Glyph *line;
1645
1646 LIMIT(n, 0, term.col - term.c.x);
1647
1648 dst = term.c.x;
1649 src = term.c.x + n;
1650 size = term.col - src;
1651 line = term.line[term.c.y];
1652
1653 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1654 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1655 }
1656
1657 void
1658 tinsertblank(int n) {
1659 int dst, src, size;
1660 Glyph *line;
1661
1662 LIMIT(n, 0, term.col - term.c.x);
1663
1664 dst = term.c.x + n;
1665 src = term.c.x;
1666 size = term.col - dst;
1667 line = term.line[term.c.y];
1668
1669 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1670 tclearregion(src, term.c.y, dst - 1, term.c.y);
1671 }
1672
1673 void
1674 tinsertblankline(int n) {
1675 if(BETWEEN(term.c.y, term.top, term.bot))
1676 tscrolldown(term.c.y, n);
1677 }
1678
1679 void
1680 tdeleteline(int n) {
1681 if(BETWEEN(term.c.y, term.top, term.bot))
1682 tscrollup(term.c.y, n);
1683 }
1684
1685 int32_t
1686 tdefcolor(int *attr, int *npar, int l) {
1687 int32_t idx = -1;
1688 uint r, g, b;
1689
1690 switch (attr[*npar + 1]) {
1691 case 2: /* direct color in RGB space */
1692 if (*npar + 4 >= l) {
1693 fprintf(stderr,
1694 "erresc(38): Incorrect number of parameters (%d)\n",
1695 *npar);
1696 break;
1697 }
1698 r = attr[*npar + 2];
1699 g = attr[*npar + 3];
1700 b = attr[*npar + 4];
1701 *npar += 4;
1702 if(!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
1703 fprintf(stderr, "erresc: bad rgb color (%d,%d,%d)\n",
1704 r, g, b);
1705 else
1706 idx = TRUECOLOR(r, g, b);
1707 break;
1708 case 5: /* indexed color */
1709 if (*npar + 2 >= l) {
1710 fprintf(stderr,
1711 "erresc(38): Incorrect number of parameters (%d)\n",
1712 *npar);
1713 break;
1714 }
1715 *npar += 2;
1716 if(!BETWEEN(attr[*npar], 0, 255))
1717 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
1718 else
1719 idx = attr[*npar];
1720 break;
1721 case 0: /* implemented defined (only foreground) */
1722 case 1: /* transparent */
1723 case 3: /* direct color in CMY space */
1724 case 4: /* direct color in CMYK space */
1725 default:
1726 fprintf(stderr,
1727 "erresc(38): gfx attr %d unknown\n", attr[*npar]);
1728 break;
1729 }
1730
1731 return idx;
1732 }
1733
1734 void
1735 tsetattr(int *attr, int l) {
1736 int i;
1737 int32_t idx;
1738
1739 for(i = 0; i < l; i++) {
1740 switch(attr[i]) {
1741 case 0:
1742 term.c.attr.mode &= ~(
1743 ATTR_BOLD |
1744 ATTR_FAINT |
1745 ATTR_ITALIC |
1746 ATTR_UNDERLINE |
1747 ATTR_BLINK |
1748 ATTR_REVERSE |
1749 ATTR_INVISIBLE |
1750 ATTR_STRUCK );
1751 term.c.attr.fg = defaultfg;
1752 term.c.attr.bg = defaultbg;
1753 break;
1754 case 1:
1755 term.c.attr.mode |= ATTR_BOLD;
1756 break;
1757 case 2:
1758 term.c.attr.mode |= ATTR_FAINT;
1759 break;
1760 case 3:
1761 term.c.attr.mode |= ATTR_ITALIC;
1762 break;
1763 case 4:
1764 term.c.attr.mode |= ATTR_UNDERLINE;
1765 break;
1766 case 5: /* slow blink */
1767 /* FALLTHROUGH */
1768 case 6: /* rapid blink */
1769 term.c.attr.mode |= ATTR_BLINK;
1770 break;
1771 case 7:
1772 term.c.attr.mode |= ATTR_REVERSE;
1773 break;
1774 case 8:
1775 term.c.attr.mode |= ATTR_INVISIBLE;
1776 break;
1777 case 9:
1778 term.c.attr.mode |= ATTR_STRUCK;
1779 break;
1780 case 22:
1781 term.c.attr.mode &= ~(ATTR_BOLD | ATTR_FAINT);
1782 break;
1783 case 23:
1784 term.c.attr.mode &= ~ATTR_ITALIC;
1785 break;
1786 case 24:
1787 term.c.attr.mode &= ~ATTR_UNDERLINE;
1788 break;
1789 case 25:
1790 term.c.attr.mode &= ~ATTR_BLINK;
1791 break;
1792 case 27:
1793 term.c.attr.mode &= ~ATTR_REVERSE;
1794 break;
1795 case 28:
1796 term.c.attr.mode &= ~ATTR_INVISIBLE;
1797 break;
1798 case 29:
1799 term.c.attr.mode &= ~ATTR_STRUCK;
1800 break;
1801 case 38:
1802 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1803 term.c.attr.fg = idx;
1804 break;
1805 case 39:
1806 term.c.attr.fg = defaultfg;
1807 break;
1808 case 48:
1809 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1810 term.c.attr.bg = idx;
1811 break;
1812 case 49:
1813 term.c.attr.bg = defaultbg;
1814 break;
1815 default:
1816 if(BETWEEN(attr[i], 30, 37)) {
1817 term.c.attr.fg = attr[i] - 30;
1818 } else if(BETWEEN(attr[i], 40, 47)) {
1819 term.c.attr.bg = attr[i] - 40;
1820 } else if(BETWEEN(attr[i], 90, 97)) {
1821 term.c.attr.fg = attr[i] - 90 + 8;
1822 } else if(BETWEEN(attr[i], 100, 107)) {
1823 term.c.attr.bg = attr[i] - 100 + 8;
1824 } else {
1825 fprintf(stderr,
1826 "erresc(default): gfx attr %d unknown\n",
1827 attr[i]), csidump();
1828 }
1829 break;
1830 }
1831 }
1832 }
1833
1834 void
1835 tsetscroll(int t, int b) {
1836 int temp;
1837
1838 LIMIT(t, 0, term.row-1);
1839 LIMIT(b, 0, term.row-1);
1840 if(t > b) {
1841 temp = t;
1842 t = b;
1843 b = temp;
1844 }
1845 term.top = t;
1846 term.bot = b;
1847 }
1848
1849 void
1850 tsetmode(bool priv, bool set, int *args, int narg) {
1851 int *lim, mode;
1852 bool alt;
1853
1854 for(lim = args + narg; args < lim; ++args) {
1855 if(priv) {
1856 switch(*args) {
1857 case 1: /* DECCKM -- Cursor key */
1858 MODBIT(term.mode, set, MODE_APPCURSOR);
1859 break;
1860 case 5: /* DECSCNM -- Reverse video */
1861 mode = term.mode;
1862 MODBIT(term.mode, set, MODE_REVERSE);
1863 if(mode != term.mode)
1864 redraw();
1865 break;
1866 case 6: /* DECOM -- Origin */
1867 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1868 tmoveato(0, 0);
1869 break;
1870 case 7: /* DECAWM -- Auto wrap */
1871 MODBIT(term.mode, set, MODE_WRAP);
1872 break;
1873 case 0: /* Error (IGNORED) */
1874 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1875 case 3: /* DECCOLM -- Column (IGNORED) */
1876 case 4: /* DECSCLM -- Scroll (IGNORED) */
1877 case 8: /* DECARM -- Auto repeat (IGNORED) */
1878 case 18: /* DECPFF -- Printer feed (IGNORED) */
1879 case 19: /* DECPEX -- Printer extent (IGNORED) */
1880 case 42: /* DECNRCM -- National characters (IGNORED) */
1881 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1882 break;
1883 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1884 MODBIT(term.mode, !set, MODE_HIDE);
1885 break;
1886 case 9: /* X10 mouse compatibility mode */
1887 xsetpointermotion(0);
1888 MODBIT(term.mode, 0, MODE_MOUSE);
1889 MODBIT(term.mode, set, MODE_MOUSEX10);
1890 break;
1891 case 1000: /* 1000: report button press */
1892 xsetpointermotion(0);
1893 MODBIT(term.mode, 0, MODE_MOUSE);
1894 MODBIT(term.mode, set, MODE_MOUSEBTN);
1895 break;
1896 case 1002: /* 1002: report motion on button press */
1897 xsetpointermotion(0);
1898 MODBIT(term.mode, 0, MODE_MOUSE);
1899 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1900 break;
1901 case 1003: /* 1003: enable all mouse motions */
1902 xsetpointermotion(set);
1903 MODBIT(term.mode, 0, MODE_MOUSE);
1904 MODBIT(term.mode, set, MODE_MOUSEMANY);
1905 break;
1906 case 1004: /* 1004: send focus events to tty */
1907 MODBIT(term.mode, set, MODE_FOCUS);
1908 break;
1909 case 1006: /* 1006: extended reporting mode */
1910 MODBIT(term.mode, set, MODE_MOUSESGR);
1911 break;
1912 case 1034:
1913 MODBIT(term.mode, set, MODE_8BIT);
1914 break;
1915 case 1049: /* swap screen & set/restore cursor as xterm */
1916 if (!allowaltscreen)
1917 break;
1918 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1919 /* FALLTHROUGH */
1920 case 47: /* swap screen */
1921 case 1047:
1922 if (!allowaltscreen)
1923 break;
1924 alt = IS_SET(MODE_ALTSCREEN);
1925 if(alt) {
1926 tclearregion(0, 0, term.col-1,
1927 term.row-1);
1928 }
1929 if(set ^ alt) /* set is always 1 or 0 */
1930 tswapscreen();
1931 if(*args != 1049)
1932 break;
1933 /* FALLTHROUGH */
1934 case 1048:
1935 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1936 break;
1937 case 2004: /* 2004: bracketed paste mode */
1938 MODBIT(term.mode, set, MODE_BRCKTPASTE);
1939 break;
1940 /* Not implemented mouse modes. See comments there. */
1941 case 1001: /* mouse highlight mode; can hang the
1942 terminal by design when implemented. */
1943 case 1005: /* UTF-8 mouse mode; will confuse
1944 applications not supporting UTF-8
1945 and luit. */
1946 case 1015: /* urxvt mangled mouse mode; incompatible
1947 and can be mistaken for other control
1948 codes. */
1949 default:
1950 fprintf(stderr,
1951 "erresc: unknown private set/reset mode %d\n",
1952 *args);
1953 break;
1954 }
1955 } else {
1956 switch(*args) {
1957 case 0: /* Error (IGNORED) */
1958 break;
1959 case 2: /* KAM -- keyboard action */
1960 MODBIT(term.mode, set, MODE_KBDLOCK);
1961 break;
1962 case 4: /* IRM -- Insertion-replacement */
1963 MODBIT(term.mode, set, MODE_INSERT);
1964 break;
1965 case 12: /* SRM -- Send/Receive */
1966 MODBIT(term.mode, !set, MODE_ECHO);
1967 break;
1968 case 20: /* LNM -- Linefeed/new line */
1969 MODBIT(term.mode, set, MODE_CRLF);
1970 break;
1971 default:
1972 fprintf(stderr,
1973 "erresc: unknown set/reset mode %d\n",
1974 *args);
1975 break;
1976 }
1977 }
1978 }
1979 }
1980
1981 void
1982 csihandle(void) {
1983 char buf[40];
1984 int len;
1985
1986 switch(csiescseq.mode) {
1987 default:
1988 unknown:
1989 fprintf(stderr, "erresc: unknown csi ");
1990 csidump();
1991 /* die(""); */
1992 break;
1993 case '@': /* ICH -- Insert <n> blank char */
1994 DEFAULT(csiescseq.arg[0], 1);
1995 tinsertblank(csiescseq.arg[0]);
1996 break;
1997 case 'A': /* CUU -- Cursor <n> Up */
1998 DEFAULT(csiescseq.arg[0], 1);
1999 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
2000 break;
2001 case 'B': /* CUD -- Cursor <n> Down */
2002 case 'e': /* VPR --Cursor <n> Down */
2003 DEFAULT(csiescseq.arg[0], 1);
2004 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
2005 break;
2006 case 'i': /* MC -- Media Copy */
2007 switch(csiescseq.arg[0]) {
2008 case 0:
2009 tdump();
2010 break;
2011 case 1:
2012 tdumpline(term.c.y);
2013 break;
2014 case 2:
2015 tdumpsel();
2016 break;
2017 case 4:
2018 term.mode &= ~MODE_PRINT;
2019 break;
2020 case 5:
2021 term.mode |= MODE_PRINT;
2022 break;
2023 }
2024 break;
2025 case 'c': /* DA -- Device Attributes */
2026 if(csiescseq.arg[0] == 0)
2027 ttywrite(vtiden, sizeof(vtiden) - 1);
2028 break;
2029 case 'C': /* CUF -- Cursor <n> Forward */
2030 case 'a': /* HPR -- Cursor <n> Forward */
2031 DEFAULT(csiescseq.arg[0], 1);
2032 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
2033 break;
2034 case 'D': /* CUB -- Cursor <n> Backward */
2035 DEFAULT(csiescseq.arg[0], 1);
2036 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
2037 break;
2038 case 'E': /* CNL -- Cursor <n> Down and first col */
2039 DEFAULT(csiescseq.arg[0], 1);
2040 tmoveto(0, term.c.y+csiescseq.arg[0]);
2041 break;
2042 case 'F': /* CPL -- Cursor <n> Up and first col */
2043 DEFAULT(csiescseq.arg[0], 1);
2044 tmoveto(0, term.c.y-csiescseq.arg[0]);
2045 break;
2046 case 'g': /* TBC -- Tabulation clear */
2047 switch(csiescseq.arg[0]) {
2048 case 0: /* clear current tab stop */
2049 term.tabs[term.c.x] = 0;
2050 break;
2051 case 3: /* clear all the tabs */
2052 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
2053 break;
2054 default:
2055 goto unknown;
2056 }
2057 break;
2058 case 'G': /* CHA -- Move to <col> */
2059 case '`': /* HPA */
2060 DEFAULT(csiescseq.arg[0], 1);
2061 tmoveto(csiescseq.arg[0]-1, term.c.y);
2062 break;
2063 case 'H': /* CUP -- Move to <row> <col> */
2064 case 'f': /* HVP */
2065 DEFAULT(csiescseq.arg[0], 1);
2066 DEFAULT(csiescseq.arg[1], 1);
2067 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
2068 break;
2069 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
2070 DEFAULT(csiescseq.arg[0], 1);
2071 tputtab(csiescseq.arg[0]);
2072 break;
2073 case 'J': /* ED -- Clear screen */
2074 selclear(NULL);
2075 switch(csiescseq.arg[0]) {
2076 case 0: /* below */
2077 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
2078 if(term.c.y < term.row-1) {
2079 tclearregion(0, term.c.y+1, term.col-1,
2080 term.row-1);
2081 }
2082 break;
2083 case 1: /* above */
2084 if(term.c.y > 1)
2085 tclearregion(0, 0, term.col-1, term.c.y-1);
2086 tclearregion(0, term.c.y, term.c.x, term.c.y);
2087 break;
2088 case 2: /* all */
2089 tclearregion(0, 0, term.col-1, term.row-1);
2090 break;
2091 default:
2092 goto unknown;
2093 }
2094 break;
2095 case 'K': /* EL -- Clear line */
2096 switch(csiescseq.arg[0]) {
2097 case 0: /* right */
2098 tclearregion(term.c.x, term.c.y, term.col-1,
2099 term.c.y);
2100 break;
2101 case 1: /* left */
2102 tclearregion(0, term.c.y, term.c.x, term.c.y);
2103 break;
2104 case 2: /* all */
2105 tclearregion(0, term.c.y, term.col-1, term.c.y);
2106 break;
2107 }
2108 break;
2109 case 'S': /* SU -- Scroll <n> line up */
2110 DEFAULT(csiescseq.arg[0], 1);
2111 tscrollup(term.top, csiescseq.arg[0]);
2112 break;
2113 case 'T': /* SD -- Scroll <n> line down */
2114 DEFAULT(csiescseq.arg[0], 1);
2115 tscrolldown(term.top, csiescseq.arg[0]);
2116 break;
2117 case 'L': /* IL -- Insert <n> blank lines */
2118 DEFAULT(csiescseq.arg[0], 1);
2119 tinsertblankline(csiescseq.arg[0]);
2120 break;
2121 case 'l': /* RM -- Reset Mode */
2122 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
2123 break;
2124 case 'M': /* DL -- Delete <n> lines */
2125 DEFAULT(csiescseq.arg[0], 1);
2126 tdeleteline(csiescseq.arg[0]);
2127 break;
2128 case 'X': /* ECH -- Erase <n> char */
2129 DEFAULT(csiescseq.arg[0], 1);
2130 tclearregion(term.c.x, term.c.y,
2131 term.c.x + csiescseq.arg[0] - 1, term.c.y);
2132 break;
2133 case 'P': /* DCH -- Delete <n> char */
2134 DEFAULT(csiescseq.arg[0], 1);
2135 tdeletechar(csiescseq.arg[0]);
2136 break;
2137 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
2138 DEFAULT(csiescseq.arg[0], 1);
2139 tputtab(-csiescseq.arg[0]);
2140 break;
2141 case 'd': /* VPA -- Move to <row> */
2142 DEFAULT(csiescseq.arg[0], 1);
2143 tmoveato(term.c.x, csiescseq.arg[0]-1);
2144 break;
2145 case 'h': /* SM -- Set terminal mode */
2146 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
2147 break;
2148 case 'm': /* SGR -- Terminal attribute (color) */
2149 tsetattr(csiescseq.arg, csiescseq.narg);
2150 break;
2151 case 'n': /* DSR – Device Status Report (cursor position) */
2152 if (csiescseq.arg[0] == 6) {
2153 len = snprintf(buf, sizeof(buf),"\033[%i;%iR",
2154 term.c.y+1, term.c.x+1);
2155 ttywrite(buf, len);
2156 }
2157 break;
2158 case 'r': /* DECSTBM -- Set Scrolling Region */
2159 if(csiescseq.priv) {
2160 goto unknown;
2161 } else {
2162 DEFAULT(csiescseq.arg[0], 1);
2163 DEFAULT(csiescseq.arg[1], term.row);
2164 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
2165 tmoveato(0, 0);
2166 }
2167 break;
2168 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
2169 tcursor(CURSOR_SAVE);
2170 break;
2171 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
2172 tcursor(CURSOR_LOAD);
2173 break;
2174 }
2175 }
2176
2177 void
2178 csidump(void) {
2179 int i;
2180 uint c;
2181
2182 printf("ESC[");
2183 for(i = 0; i < csiescseq.len; i++) {
2184 c = csiescseq.buf[i] & 0xff;
2185 if(isprint(c)) {
2186 putchar(c);
2187 } else if(c == '\n') {
2188 printf("(\\n)");
2189 } else if(c == '\r') {
2190 printf("(\\r)");
2191 } else if(c == 0x1b) {
2192 printf("(\\e)");
2193 } else {
2194 printf("(%02x)", c);
2195 }
2196 }
2197 putchar('\n');
2198 }
2199
2200 void
2201 csireset(void) {
2202 memset(&csiescseq, 0, sizeof(csiescseq));
2203 }
2204
2205 void
2206 strhandle(void) {
2207 char *p = NULL;
2208 int j, narg, par;
2209
2210 term.esc &= ~(ESC_STR_END|ESC_STR);
2211 strparse();
2212 narg = strescseq.narg;
2213 par = atoi(strescseq.args[0]);
2214
2215 switch(strescseq.type) {
2216 case ']': /* OSC -- Operating System Command */
2217 switch(par) {
2218 case 0:
2219 case 1:
2220 case 2:
2221 if(narg > 1)
2222 xsettitle(strescseq.args[1]);
2223 return;
2224 case 4: /* color set */
2225 if(narg < 3)
2226 break;
2227 p = strescseq.args[2];
2228 /* FALLTHROUGH */
2229 case 104: /* color reset, here p = NULL */
2230 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2231 if(xsetcolorname(j, p)) {
2232 fprintf(stderr, "erresc: invalid color %s\n", p);
2233 } else {
2234 /*
2235 * TODO if defaultbg color is changed, borders
2236 * are dirty
2237 */
2238 redraw();
2239 }
2240 return;
2241 }
2242 break;
2243 case 'k': /* old title set compatibility */
2244 xsettitle(strescseq.args[0]);
2245 return;
2246 case 'P': /* DCS -- Device Control String */
2247 case '_': /* APC -- Application Program Command */
2248 case '^': /* PM -- Privacy Message */
2249 return;
2250 }
2251
2252 fprintf(stderr, "erresc: unknown str ");
2253 strdump();
2254 }
2255
2256 void
2257 strparse(void) {
2258 char *p = strescseq.buf;
2259
2260 strescseq.narg = 0;
2261 strescseq.buf[strescseq.len] = '\0';
2262 while(p && strescseq.narg < STR_ARG_SIZ)
2263 strescseq.args[strescseq.narg++] = strsep(&p, ";");
2264 }
2265
2266 void
2267 strdump(void) {
2268 int i;
2269 uint c;
2270
2271 printf("ESC%c", strescseq.type);
2272 for(i = 0; i < strescseq.len; i++) {
2273 c = strescseq.buf[i] & 0xff;
2274 if(c == '\0') {
2275 return;
2276 } else if(isprint(c)) {
2277 putchar(c);
2278 } else if(c == '\n') {
2279 printf("(\\n)");
2280 } else if(c == '\r') {
2281 printf("(\\r)");
2282 } else if(c == 0x1b) {
2283 printf("(\\e)");
2284 } else {
2285 printf("(%02x)", c);
2286 }
2287 }
2288 printf("ESC\\\n");
2289 }
2290
2291 void
2292 strreset(void) {
2293 memset(&strescseq, 0, sizeof(strescseq));
2294 }
2295
2296 void
2297 tprinter(char *s, size_t len) {
2298 if(iofd != -1 && xwrite(iofd, s, len) < 0) {
2299 fprintf(stderr, "Error writing in %s:%s\n",
2300 opt_io, strerror(errno));
2301 close(iofd);
2302 iofd = -1;
2303 }
2304 }
2305
2306 void
2307 toggleprinter(const Arg *arg) {
2308 term.mode ^= MODE_PRINT;
2309 }
2310
2311 void
2312 printscreen(const Arg *arg) {
2313 tdump();
2314 }
2315
2316 void
2317 printsel(const Arg *arg) {
2318 tdumpsel();
2319 }
2320
2321 void
2322 tdumpsel(void) {
2323 char *ptr;
2324
2325 if((ptr = getsel())) {
2326 tprinter(ptr, strlen(ptr));
2327 free(ptr);
2328 }
2329 }
2330
2331 void
2332 tdumpline(int n) {
2333 Glyph *bp, *end;
2334
2335 bp = &term.line[n][0];
2336 end = &bp[MIN(tlinelen(n), term.col) - 1];
2337 if(bp != end || bp->c[0] != ' ') {
2338 for( ;bp <= end; ++bp)
2339 tprinter(bp->c, utf8len(bp->c));
2340 }
2341 tprinter("\n", 1);
2342 }
2343
2344 void
2345 tdump(void) {
2346 int i;
2347
2348 for(i = 0; i < term.row; ++i)
2349 tdumpline(i);
2350 }
2351
2352 void
2353 tputtab(int n) {
2354 uint x = term.c.x;
2355
2356 if(n > 0) {
2357 while(x < term.col && n--)
2358 for(++x; x < term.col && !term.tabs[x]; ++x)
2359 /* nothing */ ;
2360 } else if(n < 0) {
2361 while(x > 0 && n++)
2362 for(--x; x > 0 && !term.tabs[x]; --x)
2363 /* nothing */ ;
2364 }
2365 tmoveto(x, term.c.y);
2366 }
2367
2368 void
2369 techo(char *buf, int len) {
2370 for(; len > 0; buf++, len--) {
2371 char c = *buf;
2372
2373 if(ISCONTROL((uchar) c)) { /* control code */
2374 if(c & 0x80) {
2375 c &= 0x7f;
2376 tputc("^", 1);
2377 tputc("[", 1);
2378 } else if(c != '\n' && c != '\r' && c != '\t') {
2379 c ^= 0x40;
2380 tputc("^", 1);
2381 }
2382 tputc(&c, 1);
2383 } else {
2384 break;
2385 }
2386 }
2387 if(len)
2388 tputc(buf, len);
2389 }
2390
2391 void
2392 tdeftran(char ascii) {
2393 static char cs[] = "0B";
2394 static int vcs[] = {CS_GRAPHIC0, CS_USA};
2395 char *p;
2396
2397 if((p = strchr(cs, ascii)) == NULL) {
2398 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2399 } else {
2400 term.trantbl[term.icharset] = vcs[p - cs];
2401 }
2402 }
2403
2404 void
2405 tdectest(char c) {
2406 static char E[UTF_SIZ] = "E";
2407 int x, y;
2408
2409 if(c == '8') { /* DEC screen alignment test. */
2410 for(x = 0; x < term.col; ++x) {
2411 for(y = 0; y < term.row; ++y)
2412 tsetchar(E, &term.c.attr, x, y);
2413 }
2414 }
2415 }
2416
2417 void
2418 tstrsequence(uchar c) {
2419 if (c & 0x80) {
2420 switch (c) {
2421 case 0x90: /* DCS -- Device Control String */
2422 c = 'P';
2423 break;
2424 case 0x9f: /* APC -- Application Program Command */
2425 c = '_';
2426 break;
2427 case 0x9e: /* PM -- Privacy Message */
2428 c = '^';
2429 break;
2430 case 0x9d: /* OSC -- Operating System Command */
2431 c = ']';
2432 break;
2433 }
2434 }
2435 strreset();
2436 strescseq.type = c;
2437 term.esc |= ESC_STR;
2438 return;
2439 }
2440
2441 void
2442 tcontrolcode(uchar ascii) {
2443 static char question[UTF_SIZ] = "?";
2444
2445 switch(ascii) {
2446 case '\t': /* HT */
2447 tputtab(1);
2448 return;
2449 case '\b': /* BS */
2450 tmoveto(term.c.x-1, term.c.y);
2451 return;
2452 case '\r': /* CR */
2453 tmoveto(0, term.c.y);
2454 return;
2455 case '\f': /* LF */
2456 case '\v': /* VT */
2457 case '\n': /* LF */
2458 /* go to first col if the mode is set */
2459 tnewline(IS_SET(MODE_CRLF));
2460 return;
2461 case '\a': /* BEL */
2462 if(term.esc & ESC_STR_END) {
2463 /* backwards compatibility to xterm */
2464 strhandle();
2465 } else {
2466 if(!(xw.state & WIN_FOCUSED))
2467 xseturgency(1);
2468 if (bellvolume)
2469 XkbBell(xw.dpy, xw.win, bellvolume, (Atom)NULL);
2470 }
2471 break;
2472 case '\033': /* ESC */
2473 csireset();
2474 term.esc &= ~(ESC_CSI|ESC_ALTCHARSET|ESC_TEST);
2475 term.esc |= ESC_START;
2476 return;
2477 case '\016': /* SO (LS1 -- Locking shift 1) */
2478 case '\017': /* SI (LS0 -- Locking shift 0) */
2479 term.charset = 1 - (ascii - '\016');
2480 return;
2481 case '\032': /* SUB */
2482 tsetchar(question, &term.c.attr, term.c.x, term.c.y);
2483 case '\030': /* CAN */
2484 csireset();
2485 break;
2486 case '\005': /* ENQ (IGNORED) */
2487 case '\000': /* NUL (IGNORED) */
2488 case '\021': /* XON (IGNORED) */
2489 case '\023': /* XOFF (IGNORED) */
2490 case 0177: /* DEL (IGNORED) */
2491 return;
2492 case 0x84: /* TODO: IND */
2493 break;
2494 case 0x85: /* NEL -- Next line */
2495 tnewline(1); /* always go to first col */
2496 break;
2497 case 0x88: /* HTS -- Horizontal tab stop */
2498 term.tabs[term.c.x] = 1;
2499 break;
2500 case 0x8d: /* TODO: RI */
2501 case 0x8e: /* TODO: SS2 */
2502 case 0x8f: /* TODO: SS3 */
2503 case 0x98: /* TODO: SOS */
2504 break;
2505 case 0x9a: /* DECID -- Identify Terminal */
2506 ttywrite(vtiden, sizeof(vtiden) - 1);
2507 break;
2508 case 0x9b: /* TODO: CSI */
2509 case 0x9c: /* TODO: ST */
2510 break;
2511 case 0x90: /* DCS -- Device Control String */
2512 case 0x9f: /* APC -- Application Program Command */
2513 case 0x9e: /* PM -- Privacy Message */
2514 case 0x9d: /* OSC -- Operating System Command */
2515 tstrsequence(ascii);
2516 return;
2517 }
2518 /* only CAN, SUB, \a and C1 chars interrupt a sequence */
2519 term.esc &= ~(ESC_STR_END|ESC_STR);
2520 return;
2521 }
2522
2523 /*
2524 * returns 1 when the sequence is finished and it hasn't to read
2525 * more characters for this sequence, otherwise 0
2526 */
2527 int
2528 eschandle(uchar ascii) {
2529 switch(ascii) {
2530 case '[':
2531 term.esc |= ESC_CSI;
2532 return 0;
2533 case '#':
2534 term.esc |= ESC_TEST;
2535 return 0;
2536 case 'P': /* DCS -- Device Control String */
2537 case '_': /* APC -- Application Program Command */
2538 case '^': /* PM -- Privacy Message */
2539 case ']': /* OSC -- Operating System Command */
2540 case 'k': /* old title set compatibility */
2541 tstrsequence(ascii);
2542 return 0;
2543 case 'n': /* LS2 -- Locking shift 2 */
2544 case 'o': /* LS3 -- Locking shift 3 */
2545 term.charset = 2 + (ascii - 'n');
2546 break;
2547 case '(': /* GZD4 -- set primary charset G0 */
2548 case ')': /* G1D4 -- set secondary charset G1 */
2549 case '*': /* G2D4 -- set tertiary charset G2 */
2550 case '+': /* G3D4 -- set quaternary charset G3 */
2551 term.icharset = ascii - '(';
2552 term.esc |= ESC_ALTCHARSET;
2553 return 0;
2554 case 'D': /* IND -- Linefeed */
2555 if(term.c.y == term.bot) {
2556 tscrollup(term.top, 1);
2557 } else {
2558 tmoveto(term.c.x, term.c.y+1);
2559 }
2560 break;
2561 case 'E': /* NEL -- Next line */
2562 tnewline(1); /* always go to first col */
2563 break;
2564 case 'H': /* HTS -- Horizontal tab stop */
2565 term.tabs[term.c.x] = 1;
2566 break;
2567 case 'M': /* RI -- Reverse index */
2568 if(term.c.y == term.top) {
2569 tscrolldown(term.top, 1);
2570 } else {
2571 tmoveto(term.c.x, term.c.y-1);
2572 }
2573 break;
2574 case 'Z': /* DECID -- Identify Terminal */
2575 ttywrite(vtiden, sizeof(vtiden) - 1);
2576 break;
2577 case 'c': /* RIS -- Reset to inital state */
2578 treset();
2579 xresettitle();
2580 xloadcols();
2581 break;
2582 case '=': /* DECPAM -- Application keypad */
2583 term.mode |= MODE_APPKEYPAD;
2584 break;
2585 case '>': /* DECPNM -- Normal keypad */
2586 term.mode &= ~MODE_APPKEYPAD;
2587 break;
2588 case '7': /* DECSC -- Save Cursor */
2589 tcursor(CURSOR_SAVE);
2590 break;
2591 case '8': /* DECRC -- Restore Cursor */
2592 tcursor(CURSOR_LOAD);
2593 break;
2594 case '\\': /* ST -- String Terminator */
2595 if(term.esc & ESC_STR_END)
2596 strhandle();
2597 break;
2598 default:
2599 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2600 (uchar) ascii, isprint(ascii)? ascii:'.');
2601 break;
2602 }
2603 return 1;
2604 }
2605
2606 void
2607 tputc(char *c, int len) {
2608 uchar ascii;
2609 bool control;
2610 long unicodep;
2611 int width;
2612 Glyph *gp;
2613
2614 if(len == 1) {
2615 width = 1;
2616 unicodep = ascii = *c;
2617 } else {
2618 utf8decode(c, &unicodep, UTF_SIZ);
2619 if ((width = wcwidth(unicodep)) == -1) {
2620 c = "\357\277\275"; /* UTF_INVALID */
2621 width = 1;
2622 }
2623 control = ISCONTROLC1(unicodep);
2624 ascii = unicodep;
2625 }
2626
2627 if(IS_SET(MODE_PRINT))
2628 tprinter(c, len);
2629 control = ISCONTROL(unicodep);
2630
2631 /*
2632 * STR sequence must be checked before anything else
2633 * because it uses all following characters until it
2634 * receives a ESC, a SUB, a ST or any other C1 control
2635 * character.
2636 */
2637 if(term.esc & ESC_STR) {
2638 if(width == 1 &&
2639 (ascii == '\a' || ascii == 030 ||
2640 ascii == 032 || ascii == 033 ||
2641 ISCONTROLC1(unicodep))) {
2642 term.esc &= ~(ESC_START|ESC_STR);
2643 term.esc |= ESC_STR_END;
2644 } else if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2645 memmove(&strescseq.buf[strescseq.len], c, len);
2646 strescseq.len += len;
2647 return;
2648 } else {
2649 /*
2650 * Here is a bug in terminals. If the user never sends
2651 * some code to stop the str or esc command, then st
2652 * will stop responding. But this is better than
2653 * silently failing with unknown characters. At least
2654 * then users will report back.
2655 *
2656 * In the case users ever get fixed, here is the code:
2657 */
2658 /*
2659 * term.esc = 0;
2660 * strhandle();
2661 */
2662 return;
2663 }
2664 }
2665
2666 /*
2667 * Actions of control codes must be performed as soon they arrive
2668 * because they can be embedded inside a control sequence, and
2669 * they must not cause conflicts with sequences.
2670 */
2671 if(control) {
2672 tcontrolcode(ascii);
2673 /*
2674 * control codes are not shown ever
2675 */
2676 return;
2677 } else if(term.esc & ESC_START) {
2678 if(term.esc & ESC_CSI) {
2679 csiescseq.buf[csiescseq.len++] = ascii;
2680 if(BETWEEN(ascii, 0x40, 0x7E)
2681 || csiescseq.len >= \
2682 sizeof(csiescseq.buf)-1) {
2683 term.esc = 0;
2684 csiparse();
2685 csihandle();
2686 }
2687 return;
2688 } else if(term.esc & ESC_ALTCHARSET) {
2689 tdeftran(ascii);
2690 } else if(term.esc & ESC_TEST) {
2691 tdectest(ascii);
2692 } else {
2693 if (!eschandle(ascii))
2694 return;
2695 /* sequence already finished */
2696 }
2697 term.esc = 0;
2698 /*
2699 * All characters which form part of a sequence are not
2700 * printed
2701 */
2702 return;
2703 }
2704 if(sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
2705 selclear(NULL);
2706
2707 gp = &term.line[term.c.y][term.c.x];
2708 if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2709 gp->mode |= ATTR_WRAP;
2710 tnewline(1);
2711 gp = &term.line[term.c.y][term.c.x];
2712 }
2713
2714 if(IS_SET(MODE_INSERT) && term.c.x+width < term.col)
2715 memmove(gp+width, gp, (term.col - term.c.x - width) * sizeof(Glyph));
2716
2717 if(term.c.x+width > term.col) {
2718 tnewline(1);
2719 gp = &term.line[term.c.y][term.c.x];
2720 }
2721
2722 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2723
2724 if(width == 2) {
2725 gp->mode |= ATTR_WIDE;
2726 if(term.c.x+1 < term.col) {
2727 gp[1].c[0] = '\0';
2728 gp[1].mode = ATTR_WDUMMY;
2729 }
2730 }
2731 if(term.c.x+width < term.col) {
2732 tmoveto(term.c.x+width, term.c.y);
2733 } else {
2734 term.c.state |= CURSOR_WRAPNEXT;
2735 }
2736 }
2737
2738 void
2739 tresize(int col, int row) {
2740 int i;
2741 int minrow = MIN(row, term.row);
2742 int mincol = MIN(col, term.col);
2743 int slide = term.c.y - row + 1;
2744 bool *bp;
2745 TCursor c;
2746
2747 if(col < 1 || row < 1) {
2748 fprintf(stderr,
2749 "tresize: error resizing to %dx%d\n", col, row);
2750 return;
2751 }
2752
2753 /* free unneeded rows */
2754 i = 0;
2755 if(slide > 0) {
2756 /*
2757 * slide screen to keep cursor where we expect it -
2758 * tscrollup would work here, but we can optimize to
2759 * memmove because we're freeing the earlier lines
2760 */
2761 for(/* i = 0 */; i < slide; i++) {
2762 free(term.line[i]);
2763 free(term.alt[i]);
2764 }
2765 memmove(term.line, term.line + slide, row * sizeof(Line));
2766 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2767 }
2768 for(i += row; i < term.row; i++) {
2769 free(term.line[i]);
2770 free(term.alt[i]);
2771 }
2772
2773 /* resize to new height */
2774 term.line = xrealloc(term.line, row * sizeof(Line));
2775 term.alt = xrealloc(term.alt, row * sizeof(Line));
2776 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2777 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2778
2779 /* resize each row to new width, zero-pad if needed */
2780 for(i = 0; i < minrow; i++) {
2781 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2782 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2783 }
2784
2785 /* allocate any new rows */
2786 for(/* i == minrow */; i < row; i++) {
2787 term.line[i] = xmalloc(col * sizeof(Glyph));
2788 term.alt[i] = xmalloc(col * sizeof(Glyph));
2789 }
2790 if(col > term.col) {
2791 bp = term.tabs + term.col;
2792
2793 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2794 while(--bp > term.tabs && !*bp)
2795 /* nothing */ ;
2796 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2797 *bp = 1;
2798 }
2799 /* update terminal size */
2800 term.col = col;
2801 term.row = row;
2802 /* reset scrolling region */
2803 tsetscroll(0, row-1);
2804 /* make use of the LIMIT in tmoveto */
2805 tmoveto(term.c.x, term.c.y);
2806 /* Clearing both screens (it makes dirty all lines) */
2807 c = term.c;
2808 for(i = 0; i < 2; i++) {
2809 if(mincol < col && 0 < minrow) {
2810 tclearregion(mincol, 0, col - 1, minrow - 1);
2811 }
2812 if(0 < col && minrow < row) {
2813 tclearregion(0, minrow, col - 1, row - 1);
2814 }
2815 tswapscreen();
2816 tcursor(CURSOR_LOAD);
2817 }
2818 term.c = c;
2819 }
2820
2821 void
2822 xresize(int col, int row) {
2823 xw.tw = MAX(1, col * xw.cw);
2824 xw.th = MAX(1, row * xw.ch);
2825
2826 XFreePixmap(xw.dpy, xw.buf);
2827 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2828 DefaultDepth(xw.dpy, xw.scr));
2829 XftDrawChange(xw.draw, xw.buf);
2830 xclear(0, 0, xw.w, xw.h);
2831 }
2832
2833 static inline ushort
2834 sixd_to_16bit(int x) {
2835 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2836 }
2837
2838 void
2839 xloadcols(void) {
2840 int i;
2841 XRenderColor color = { .alpha = 0xffff };
2842 static bool loaded;
2843 Color *cp;
2844
2845 if(loaded) {
2846 for (cp = dc.col; cp < dc.col + LEN(dc.col); ++cp)
2847 XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
2848 }
2849
2850 /* load colors [0-15] and [256-LEN(colorname)] (config.h) */
2851 for(i = 0; i < LEN(colorname); i++) {
2852 if(!colorname[i])
2853 continue;
2854 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2855 die("Could not allocate color '%s'\n", colorname[i]);
2856 }
2857 }
2858
2859 /* load colors [16-231] ; same colors as xterm */
2860 for(i = 16; i < 6*6*6+16; i++) {
2861 color.red = sixd_to_16bit( ((i-16)/36)%6 );
2862 color.green = sixd_to_16bit( ((i-16)/6) %6 );
2863 color.blue = sixd_to_16bit( ((i-16)/1) %6 );
2864 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i]))
2865 die("Could not allocate color %d\n", i);
2866 }
2867
2868 /* load colors [232-255] ; grayscale */
2869 for(; i < 256; i++) {
2870 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (i-(6*6*6+16));
2871 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i]))
2872 die("Could not allocate color %d\n", i);
2873 }
2874 loaded = true;
2875 }
2876
2877 int
2878 xsetcolorname(int x, const char *name) {
2879 XRenderColor color = { .alpha = 0xffff };
2880 Color ncolor;
2881
2882 if(!BETWEEN(x, 0, LEN(colorname)))
2883 return 1;
2884
2885 if(!name) {
2886 if(BETWEEN(x, 16, 16 + 215)) { /* 256 color */
2887 color.red = sixd_to_16bit( ((x-16)/36)%6 );
2888 color.green = sixd_to_16bit( ((x-16)/6) %6 );
2889 color.blue = sixd_to_16bit( ((x-16)/1) %6 );
2890 if(!XftColorAllocValue(xw.dpy, xw.vis,
2891 xw.cmap, &color, &ncolor)) {
2892 return 1;
2893 }
2894
2895 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2896 dc.col[x] = ncolor;
2897 return 0;
2898 } else if(BETWEEN(x, 16 + 216, 255)) { /* greyscale */
2899 color.red = color.green = color.blue = \
2900 0x0808 + 0x0a0a * (x - (16 + 216));
2901 if(!XftColorAllocValue(xw.dpy, xw.vis,
2902 xw.cmap, &color, &ncolor)) {
2903 return 1;
2904 }
2905
2906 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2907 dc.col[x] = ncolor;
2908 return 0;
2909 } else { /* system colors */
2910 name = colorname[x];
2911 }
2912 }
2913 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &ncolor))
2914 return 1;
2915
2916 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2917 dc.col[x] = ncolor;
2918 return 0;
2919 }
2920
2921 void
2922 xtermclear(int col1, int row1, int col2, int row2) {
2923 XftDrawRect(xw.draw,
2924 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2925 borderpx + col1 * xw.cw,
2926 borderpx + row1 * xw.ch,
2927 (col2-col1+1) * xw.cw,
2928 (row2-row1+1) * xw.ch);
2929 }
2930
2931 /*
2932 * Absolute coordinates.
2933 */
2934 void
2935 xclear(int x1, int y1, int x2, int y2) {
2936 XftDrawRect(xw.draw,
2937 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2938 x1, y1, x2-x1, y2-y1);
2939 }
2940
2941 void
2942 xhints(void) {
2943 XClassHint class = {opt_class ? opt_class : termname, termname};
2944 XWMHints wm = {.flags = InputHint, .input = 1};
2945 XSizeHints *sizeh = NULL;
2946
2947 sizeh = XAllocSizeHints();
2948
2949 sizeh->flags = PSize | PResizeInc | PBaseSize;
2950 sizeh->height = xw.h;
2951 sizeh->width = xw.w;
2952 sizeh->height_inc = xw.ch;
2953 sizeh->width_inc = xw.cw;
2954 sizeh->base_height = 2 * borderpx;
2955 sizeh->base_width = 2 * borderpx;
2956 if(xw.isfixed == True) {
2957 sizeh->flags |= PMaxSize | PMinSize;
2958 sizeh->min_width = sizeh->max_width = xw.w;
2959 sizeh->min_height = sizeh->max_height = xw.h;
2960 }
2961 if(xw.gm & (XValue|YValue)) {
2962 sizeh->flags |= USPosition | PWinGravity;
2963 sizeh->x = xw.l;
2964 sizeh->y = xw.t;
2965 sizeh->win_gravity = xgeommasktogravity(xw.gm);
2966 }
2967
2968 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
2969 &class);
2970 XFree(sizeh);
2971 }
2972
2973 int
2974 xgeommasktogravity(int mask) {
2975 switch(mask & (XNegative|YNegative)) {
2976 case 0:
2977 return NorthWestGravity;
2978 case XNegative:
2979 return NorthEastGravity;
2980 case YNegative:
2981 return SouthWestGravity;
2982 }
2983 return SouthEastGravity;
2984 }
2985
2986 int
2987 xloadfont(Font *f, FcPattern *pattern) {
2988 FcPattern *match;
2989 FcResult result;
2990
2991 match = FcFontMatch(NULL, pattern, &result);
2992 if(!match)
2993 return 1;
2994
2995 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2996 FcPatternDestroy(match);
2997 return 1;
2998 }
2999
3000 f->set = NULL;
3001 f->pattern = FcPatternDuplicate(pattern);
3002
3003 f->ascent = f->match->ascent;
3004 f->descent = f->match->descent;
3005 f->lbearing = 0;
3006 f->rbearing = f->match->max_advance_width;
3007
3008 f->height = f->ascent + f->descent;
3009 f->width = f->lbearing + f->rbearing;
3010
3011 return 0;
3012 }
3013
3014 void
3015 xloadfonts(char *fontstr, double fontsize) {
3016 FcPattern *pattern;
3017 FcResult r_sz, r_psz;
3018 double fontval;
3019 float ceilf(float);
3020
3021 if(fontstr[0] == '-') {
3022 pattern = XftXlfdParse(fontstr, False, False);
3023 } else {
3024 pattern = FcNameParse((FcChar8 *)fontstr);
3025 }
3026
3027 if(!pattern)
3028 die("st: can't open font %s\n", fontstr);
3029
3030 if(fontsize > 1) {
3031 FcPatternDel(pattern, FC_PIXEL_SIZE);
3032 FcPatternDel(pattern, FC_SIZE);
3033 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
3034 usedfontsize = fontsize;
3035 } else {
3036 r_psz = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
3037 r_sz = FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval);
3038 if(r_psz == FcResultMatch) {
3039 usedfontsize = fontval;
3040 } else if(r_sz == FcResultMatch) {
3041 usedfontsize = -1;
3042 } else {
3043 /*
3044 * Default font size is 12, if none given. This is to
3045 * have a known usedfontsize value.
3046 */
3047 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
3048 usedfontsize = 12;
3049 }
3050 defaultfontsize = usedfontsize;
3051 }
3052
3053 FcConfigSubstitute(0, pattern, FcMatchPattern);
3054 FcDefaultSubstitute(pattern);
3055
3056 if(xloadfont(&dc.font, pattern))
3057 die("st: can't open font %s\n", fontstr);
3058
3059 if(usedfontsize < 0) {
3060 FcPatternGetDouble(dc.font.match->pattern,
3061 FC_PIXEL_SIZE, 0, &fontval);
3062 usedfontsize = fontval;
3063 if(fontsize == 0)
3064 defaultfontsize = fontval;
3065 }
3066
3067 /* Setting character width and height. */
3068 xw.cw = ceilf(dc.font.width * cwscale);
3069 xw.ch = ceilf(dc.font.height * chscale);
3070
3071 FcPatternDel(pattern, FC_SLANT);
3072 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
3073 if(xloadfont(&dc.ifont, pattern))
3074 die("st: can't open font %s\n", fontstr);
3075
3076 FcPatternDel(pattern, FC_WEIGHT);
3077 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
3078 if(xloadfont(&dc.ibfont, pattern))
3079 die("st: can't open font %s\n", fontstr);
3080
3081 FcPatternDel(pattern, FC_SLANT);
3082 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
3083 if(xloadfont(&dc.bfont, pattern))
3084 die("st: can't open font %s\n", fontstr);
3085
3086 FcPatternDestroy(pattern);
3087 }
3088
3089 int
3090 xloadfontset(Font *f) {
3091 FcResult result;
3092
3093 if(!(f->set = FcFontSort(0, f->pattern, FcTrue, 0, &result)))
3094 return 1;
3095 return 0;
3096 }
3097
3098 void
3099 xunloadfont(Font *f) {
3100 XftFontClose(xw.dpy, f->match);
3101 FcPatternDestroy(f->pattern);
3102 if(f->set)
3103 FcFontSetDestroy(f->set);
3104 }
3105
3106 void
3107 xunloadfonts(void) {
3108 /* Free the loaded fonts in the font cache. */
3109 while(frclen > 0)
3110 XftFontClose(xw.dpy, frc[--frclen].font);
3111
3112 xunloadfont(&dc.font);
3113 xunloadfont(&dc.bfont);
3114 xunloadfont(&dc.ifont);
3115 xunloadfont(&dc.ibfont);
3116 }
3117
3118 void
3119 xzoom(const Arg *arg) {
3120 Arg larg;
3121
3122 larg.i = usedfontsize + arg->i;
3123 xzoomabs(&larg);
3124 }
3125
3126 void
3127 xzoomabs(const Arg *arg) {
3128 xunloadfonts();
3129 xloadfonts(usedfont, arg->i);
3130 cresize(0, 0);
3131 redraw();
3132 xhints();
3133 }
3134
3135 void
3136 xzoomreset(const Arg *arg) {
3137 Arg larg;
3138
3139 if(defaultfontsize > 0) {
3140 larg.i = defaultfontsize;
3141 xzoomabs(&larg);
3142 }
3143 }
3144
3145 void
3146 xinit(void) {
3147 XGCValues gcvalues;
3148 Cursor cursor;
3149 Window parent;
3150 pid_t thispid = getpid();
3151
3152 if(!(xw.dpy = XOpenDisplay(NULL)))
3153 die("Can't open display\n");
3154 xw.scr = XDefaultScreen(xw.dpy);
3155 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
3156
3157 /* font */
3158 if(!FcInit())
3159 die("Could not init fontconfig.\n");
3160
3161 usedfont = (opt_font == NULL)? font : opt_font;
3162 xloadfonts(usedfont, 0);
3163
3164 /* colors */
3165 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
3166 xloadcols();
3167
3168 /* adjust fixed window geometry */
3169 xw.w = 2 * borderpx + term.col * xw.cw;
3170 xw.h = 2 * borderpx + term.row * xw.ch;
3171 if(xw.gm & XNegative)
3172 xw.l += DisplayWidth(xw.dpy, xw.scr) - xw.w - 2;
3173 if(xw.gm & YNegative)
3174 xw.t += DisplayWidth(xw.dpy, xw.scr) - xw.h - 2;
3175
3176 /* Events */
3177 xw.attrs.background_pixel = dc.col[defaultbg].pixel;
3178 xw.attrs.border_pixel = dc.col[defaultbg].pixel;
3179 xw.attrs.bit_gravity = NorthWestGravity;
3180 xw.attrs.event_mask = FocusChangeMask | KeyPressMask
3181 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
3182 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
3183 xw.attrs.colormap = xw.cmap;
3184
3185 if (!(opt_embed && (parent = strtol(opt_embed, NULL, 0))))
3186 parent = XRootWindow(xw.dpy, xw.scr);
3187 xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
3188 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
3189 xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
3190 | CWEventMask | CWColormap, &xw.attrs);
3191
3192 memset(&gcvalues, 0, sizeof(gcvalues));
3193 gcvalues.graphics_exposures = False;
3194 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
3195 &gcvalues);
3196 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
3197 DefaultDepth(xw.dpy, xw.scr));
3198 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
3199 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
3200
3201 /* Xft rendering context */
3202 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
3203
3204 /* input methods */
3205 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3206 XSetLocaleModifiers("@im=local");
3207 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3208 XSetLocaleModifiers("@im=");
3209 if((xw.xim = XOpenIM(xw.dpy,
3210 NULL, NULL, NULL)) == NULL) {
3211 die("XOpenIM failed. Could not open input"
3212 " device.\n");
3213 }
3214 }
3215 }
3216 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
3217 | XIMStatusNothing, XNClientWindow, xw.win,
3218 XNFocusWindow, xw.win, NULL);
3219 if(xw.xic == NULL)
3220 die("XCreateIC failed. Could not obtain input method.\n");
3221
3222 /* white cursor, black outline */
3223 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
3224 XDefineCursor(xw.dpy, xw.win, cursor);
3225 XRecolorCursor(xw.dpy, cursor,
3226 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
3227 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
3228
3229 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
3230 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
3231 xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
3232 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
3233
3234 xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
3235 XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
3236 PropModeReplace, (uchar *)&thispid, 1);
3237
3238 xresettitle();
3239 XMapWindow(xw.dpy, xw.win);
3240 xhints();
3241 XSync(xw.dpy, False);
3242 }
3243
3244 void
3245 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
3246 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
3247 width = charlen * xw.cw, xp, i;
3248 int frcflags, charexists;
3249 int u8fl, u8fblen, u8cblen, doesexist;
3250 char *u8c, *u8fs;
3251 long unicodep;
3252 Font *font = &dc.font;
3253 FcResult fcres;
3254 FcPattern *fcpattern, *fontpattern;
3255 FcFontSet *fcsets[] = { NULL };
3256 FcCharSet *fccharset;
3257 Color *fg, *bg, *temp, revfg, revbg, truefg, truebg;
3258 XRenderColor colfg, colbg;
3259 XRectangle r;
3260 int oneatatime;
3261
3262 frcflags = FRC_NORMAL;
3263
3264 if(base.mode & ATTR_ITALIC) {
3265 if(base.fg == defaultfg)
3266 base.fg = defaultitalic;
3267 font = &dc.ifont;
3268 frcflags = FRC_ITALIC;
3269 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
3270 if(base.fg == defaultfg)
3271 base.fg = defaultitalic;
3272 font = &dc.ibfont;
3273 frcflags = FRC_ITALICBOLD;
3274 } else if(base.mode & ATTR_UNDERLINE) {
3275 if(base.fg == defaultfg)
3276 base.fg = defaultunderline;
3277 }
3278
3279 if(IS_TRUECOL(base.fg)) {
3280 colfg.alpha = 0xffff;
3281 colfg.red = TRUERED(base.fg);
3282 colfg.green = TRUEGREEN(base.fg);
3283 colfg.blue = TRUEBLUE(base.fg);
3284 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
3285 fg = &truefg;
3286 } else {
3287 fg = &dc.col[base.fg];
3288 }
3289
3290 if(IS_TRUECOL(base.bg)) {
3291 colbg.alpha = 0xffff;
3292 colbg.green = TRUEGREEN(base.bg);
3293 colbg.red = TRUERED(base.bg);
3294 colbg.blue = TRUEBLUE(base.bg);
3295 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
3296 bg = &truebg;
3297 } else {
3298 bg = &dc.col[base.bg];
3299 }
3300
3301 if(base.mode & ATTR_BOLD) {
3302 /*
3303 * change basic system colors [0-7]
3304 * to bright system colors [8-15]
3305 */
3306 if(BETWEEN(base.fg, 0, 7) && !(base.mode & ATTR_FAINT))
3307 fg = &dc.col[base.fg + 8];
3308
3309 if(base.mode & ATTR_ITALIC) {
3310 font = &dc.ibfont;
3311 frcflags = FRC_ITALICBOLD;
3312 } else {
3313 font = &dc.bfont;
3314 frcflags = FRC_BOLD;
3315 }
3316 }
3317
3318 if(IS_SET(MODE_REVERSE)) {
3319 if(fg == &dc.col[defaultfg]) {
3320 fg = &dc.col[defaultbg];
3321 } else {
3322 colfg.red = ~fg->color.red;
3323 colfg.green = ~fg->color.green;
3324 colfg.blue = ~fg->color.blue;
3325 colfg.alpha = fg->color.alpha;
3326 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
3327 &revfg);
3328 fg = &revfg;
3329 }
3330
3331 if(bg == &dc.col[defaultbg]) {
3332 bg = &dc.col[defaultfg];
3333 } else {
3334 colbg.red = ~bg->color.red;
3335 colbg.green = ~bg->color.green;
3336 colbg.blue = ~bg->color.blue;
3337 colbg.alpha = bg->color.alpha;
3338 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
3339 &revbg);
3340 bg = &revbg;
3341 }
3342 }
3343
3344 if(base.mode & ATTR_REVERSE) {
3345 temp = fg;
3346 fg = bg;
3347 bg = temp;
3348 }
3349
3350 if(base.mode & ATTR_FAINT && !(base.mode & ATTR_BOLD)) {
3351 colfg.red = fg->color.red / 2;
3352 colfg.green = fg->color.green / 2;
3353 colfg.blue = fg->color.blue / 2;
3354 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
3355 fg = &revfg;
3356 }
3357
3358 if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
3359 fg = bg;
3360
3361 if(base.mode & ATTR_INVISIBLE)
3362 fg = bg;
3363
3364 /* Intelligent cleaning up of the borders. */
3365 if(x == 0) {
3366 xclear(0, (y == 0)? 0 : winy, borderpx,
3367 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
3368 }
3369 if(x + charlen >= term.col) {
3370 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
3371 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
3372 }
3373 if(y == 0)
3374 xclear(winx, 0, winx + width, borderpx);
3375 if(y == term.row-1)
3376 xclear(winx, winy + xw.ch, winx + width, xw.h);
3377
3378 /* Clean up the region we want to draw to. */
3379 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
3380
3381 /* Set the clip region because Xft is sometimes dirty. */
3382 r.x = 0;
3383 r.y = 0;
3384 r.height = xw.ch;
3385 r.width = width;
3386 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
3387
3388 for(xp = winx; bytelen > 0;) {
3389 /*
3390 * Search for the range in the to be printed string of glyphs
3391 * that are in the main font. Then print that range. If
3392 * some glyph is found that is not in the font, do the
3393 * fallback dance.
3394 */
3395 u8fs = s;
3396 u8fblen = 0;
3397 u8fl = 0;
3398 oneatatime = font->width != xw.cw;
3399 for(;;) {
3400 u8c = s;
3401 u8cblen = utf8decode(s, &unicodep, UTF_SIZ);
3402 s += u8cblen;
3403 bytelen -= u8cblen;
3404
3405 doesexist = XftCharExists(xw.dpy, font->match, unicodep);
3406 if(doesexist) {
3407 u8fl++;
3408 u8fblen += u8cblen;
3409 if(!oneatatime && bytelen > 0)
3410 continue;
3411 }
3412
3413 if(u8fl > 0) {
3414 XftDrawStringUtf8(xw.draw, fg,
3415 font->match, xp,
3416 winy + font->ascent,
3417 (FcChar8 *)u8fs,
3418 u8fblen);
3419 xp += xw.cw * u8fl;
3420 }
3421 break;
3422 }
3423 if(doesexist) {
3424 if(oneatatime)
3425 continue;
3426 break;
3427 }
3428
3429 /* Search the font cache. */
3430 for(i = 0; i < frclen; i++) {
3431 charexists = XftCharExists(xw.dpy, frc[i].font, unicodep);
3432 /* Everything correct. */
3433 if(charexists && frc[i].flags == frcflags)
3434 break;
3435 /* We got a default font for a not found glyph. */
3436 if(!charexists && frc[i].flags == frcflags \
3437 && frc[i].unicodep == unicodep) {
3438 break;
3439 }
3440 }
3441
3442 /* Nothing was found. */
3443 if(i >= frclen) {
3444 if(!font->set)
3445 xloadfontset(font);
3446 fcsets[0] = font->set;
3447
3448 /*
3449 * Nothing was found in the cache. Now use
3450 * some dozen of Fontconfig calls to get the
3451 * font for one single character.
3452 *
3453 * Xft and fontconfig are design failures.
3454 */
3455 fcpattern = FcPatternDuplicate(font->pattern);
3456 fccharset = FcCharSetCreate();
3457
3458 FcCharSetAddChar(fccharset, unicodep);
3459 FcPatternAddCharSet(fcpattern, FC_CHARSET,
3460 fccharset);
3461 FcPatternAddBool(fcpattern, FC_SCALABLE,
3462 FcTrue);
3463
3464 FcConfigSubstitute(0, fcpattern,
3465 FcMatchPattern);
3466 FcDefaultSubstitute(fcpattern);
3467
3468 fontpattern = FcFontSetMatch(0, fcsets, 1,
3469 fcpattern, &fcres);
3470
3471 /*
3472 * Overwrite or create the new cache entry.
3473 */
3474 if(frclen >= LEN(frc)) {
3475 frclen = LEN(frc) - 1;
3476 XftFontClose(xw.dpy, frc[frclen].font);
3477 frc[frclen].unicodep = 0;
3478 }
3479
3480 frc[frclen].font = XftFontOpenPattern(xw.dpy,
3481 fontpattern);
3482 frc[frclen].flags = frcflags;
3483 frc[frclen].unicodep = unicodep;
3484
3485 i = frclen;
3486 frclen++;
3487
3488 FcPatternDestroy(fcpattern);
3489 FcCharSetDestroy(fccharset);
3490 }
3491
3492 XftDrawStringUtf8(xw.draw, fg, frc[i].font,
3493 xp, winy + frc[i].font->ascent,
3494 (FcChar8 *)u8c, u8cblen);
3495
3496 xp += xw.cw * wcwidth(unicodep);
3497 }
3498
3499 /*
3500 * This is how the loop above actually should be. Why does the
3501 * application have to care about font details?
3502 *
3503 * I have to repeat: Xft and Fontconfig are design failures.
3504 */
3505 /*
3506 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
3507 winy + font->ascent, (FcChar8 *)s, bytelen);
3508 */
3509
3510 if(base.mode & ATTR_UNDERLINE) {
3511 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
3512 width, 1);
3513 }
3514
3515 if(base.mode & ATTR_STRUCK) {
3516 XftDrawRect(xw.draw, fg, winx, winy + 2 * font->ascent / 3,
3517 width, 1);
3518 }
3519
3520 /* Reset clip to none. */
3521 XftDrawSetClip(xw.draw, 0);
3522 }
3523
3524 void
3525 xdrawcursor(void) {
3526 static int oldx = 0, oldy = 0;
3527 int sl, width, curx;
3528 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
3529
3530 LIMIT(oldx, 0, term.col-1);
3531 LIMIT(oldy, 0, term.row-1);
3532
3533 curx = term.c.x;
3534
3535 /* adjust position if in dummy */
3536 if(term.line[oldy][oldx].mode & ATTR_WDUMMY)
3537 oldx--;
3538 if(term.line[term.c.y][curx].mode & ATTR_WDUMMY)
3539 curx--;
3540
3541 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
3542
3543 /* remove the old cursor */
3544 sl = utf8len(term.line[oldy][oldx].c);
3545 width = (term.line[oldy][oldx].mode & ATTR_WIDE)? 2 : 1;
3546 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
3547 oldy, width, sl);
3548
3549 if(IS_SET(MODE_HIDE))
3550 return;
3551
3552 /* draw the new one */
3553 if(xw.state & WIN_FOCUSED) {
3554 if(IS_SET(MODE_REVERSE)) {
3555 g.mode |= ATTR_REVERSE;
3556 g.fg = defaultcs;
3557 g.bg = defaultfg;
3558 }
3559
3560 sl = utf8len(g.c);
3561 width = (term.line[term.c.y][curx].mode & ATTR_WIDE)\
3562 ? 2 : 1;
3563 xdraws(g.c, g, term.c.x, term.c.y, width, sl);
3564 } else {
3565 XftDrawRect(xw.draw, &dc.col[defaultcs],
3566 borderpx + curx * xw.cw,
3567 borderpx + term.c.y * xw.ch,
3568 xw.cw - 1, 1);
3569 XftDrawRect(xw.draw, &dc.col[defaultcs],
3570 borderpx + curx * xw.cw,
3571 borderpx + term.c.y * xw.ch,
3572 1, xw.ch - 1);
3573 XftDrawRect(xw.draw, &dc.col[defaultcs],
3574 borderpx + (curx + 1) * xw.cw - 1,
3575 borderpx + term.c.y * xw.ch,
3576 1, xw.ch - 1);
3577 XftDrawRect(xw.draw, &dc.col[defaultcs],
3578 borderpx + curx * xw.cw,
3579 borderpx + (term.c.y + 1) * xw.ch - 1,
3580 xw.cw, 1);
3581 }
3582 oldx = curx, oldy = term.c.y;
3583 }
3584
3585
3586 void
3587 xsettitle(char *p) {
3588 XTextProperty prop;
3589
3590 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3591 &prop);
3592 XSetWMName(xw.dpy, xw.win, &prop);
3593 XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
3594 XFree(prop.value);
3595 }
3596
3597 void
3598 xresettitle(void) {
3599 xsettitle(opt_title ? opt_title : "st");
3600 }
3601
3602 void
3603 redraw(void) {
3604 tfulldirt();
3605 draw();
3606 }
3607
3608 void
3609 draw(void) {
3610 drawregion(0, 0, term.col, term.row);
3611 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3612 xw.h, 0, 0);
3613 XSetForeground(xw.dpy, dc.gc,
3614 dc.col[IS_SET(MODE_REVERSE)?
3615 defaultfg : defaultbg].pixel);
3616 }
3617
3618 void
3619 drawregion(int x1, int y1, int x2, int y2) {
3620 int ic, ib, x, y, ox, sl;
3621 Glyph base, new;
3622 char buf[DRAW_BUF_SIZ];
3623 bool ena_sel = sel.ob.x != -1 && sel.alt == IS_SET(MODE_ALTSCREEN);
3624 long unicodep;
3625
3626 if(!(xw.state & WIN_VISIBLE))
3627 return;
3628
3629 for(y = y1; y < y2; y++) {
3630 if(!term.dirty[y])
3631 continue;
3632
3633 xtermclear(0, y, term.col, y);
3634 term.dirty[y] = 0;
3635 base = term.line[y][0];
3636 ic = ib = ox = 0;
3637 for(x = x1; x < x2; x++) {
3638 new = term.line[y][x];
3639 if(new.mode == ATTR_WDUMMY)
3640 continue;
3641 if(ena_sel && selected(x, y))
3642 new.mode ^= ATTR_REVERSE;
3643 if(ib > 0 && (ATTRCMP(base, new)
3644 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3645 xdraws(buf, base, ox, y, ic, ib);
3646 ic = ib = 0;
3647 }
3648 if(ib == 0) {
3649 ox = x;
3650 base = new;
3651 }
3652
3653 sl = utf8decode(new.c, &unicodep, UTF_SIZ);
3654 memcpy(buf+ib, new.c, sl);
3655 ib += sl;
3656 ic += (new.mode & ATTR_WIDE)? 2 : 1;
3657 }
3658 if(ib > 0)
3659 xdraws(buf, base, ox, y, ic, ib);
3660 }
3661 xdrawcursor();
3662 }
3663
3664 void
3665 expose(XEvent *ev) {
3666 XExposeEvent *e = &ev->xexpose;
3667
3668 if(xw.state & WIN_REDRAW) {
3669 if(!e->count)
3670 xw.state &= ~WIN_REDRAW;
3671 }
3672 redraw();
3673 }
3674
3675 void
3676 visibility(XEvent *ev) {
3677 XVisibilityEvent *e = &ev->xvisibility;
3678
3679 if(e->state == VisibilityFullyObscured) {
3680 xw.state &= ~WIN_VISIBLE;
3681 } else if(!(xw.state & WIN_VISIBLE)) {
3682 /* need a full redraw for next Expose, not just a buf copy */
3683 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3684 }
3685 }
3686
3687 void
3688 unmap(XEvent *ev) {
3689 xw.state &= ~WIN_VISIBLE;
3690 }
3691
3692 void
3693 xsetpointermotion(int set) {
3694 MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
3695 XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
3696 }
3697
3698 void
3699 xseturgency(int add) {
3700 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3701
3702 MODBIT(h->flags, add, XUrgencyHint);
3703 XSetWMHints(xw.dpy, xw.win, h);
3704 XFree(h);
3705 }
3706
3707 void
3708 focus(XEvent *ev) {
3709 XFocusChangeEvent *e = &ev->xfocus;
3710
3711 if(e->mode == NotifyGrab)
3712 return;
3713
3714 if(ev->type == FocusIn) {
3715 XSetICFocus(xw.xic);
3716 xw.state |= WIN_FOCUSED;
3717 xseturgency(0);
3718 if(IS_SET(MODE_FOCUS))
3719 ttywrite("\033[I", 3);
3720 } else {
3721 XUnsetICFocus(xw.xic);
3722 xw.state &= ~WIN_FOCUSED;
3723 if(IS_SET(MODE_FOCUS))
3724 ttywrite("\033[O", 3);
3725 }
3726 }
3727
3728 static inline bool
3729 match(uint mask, uint state) {
3730 return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
3731 }
3732
3733 void
3734 numlock(const Arg *dummy) {
3735 term.numlock ^= 1;
3736 }
3737
3738 char*
3739 kmap(KeySym k, uint state) {
3740 Key *kp;
3741 int i;
3742
3743 /* Check for mapped keys out of X11 function keys. */
3744 for(i = 0; i < LEN(mappedkeys); i++) {
3745 if(mappedkeys[i] == k)
3746 break;
3747 }
3748 if(i == LEN(mappedkeys)) {
3749 if((k & 0xFFFF) < 0xFD00)
3750 return NULL;
3751 }
3752
3753 for(kp = key; kp < key + LEN(key); kp++) {
3754 if(kp->k != k)
3755 continue;
3756
3757 if(!match(kp->mask, state))
3758 continue;
3759
3760 if(IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
3761 continue;
3762 if(term.numlock && kp->appkey == 2)
3763 continue;
3764
3765 if(IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
3766 continue;
3767
3768 if(IS_SET(MODE_CRLF) ? kp->crlf < 0 : kp->crlf > 0)
3769 continue;
3770
3771 return kp->s;
3772 }
3773
3774 return NULL;
3775 }
3776
3777 void
3778 kpress(XEvent *ev) {
3779 XKeyEvent *e = &ev->xkey;
3780 KeySym ksym;
3781 char buf[32], *customkey;
3782 int len;
3783 long c;
3784 Status status;
3785 Shortcut *bp;
3786
3787 if(IS_SET(MODE_KBDLOCK))
3788 return;
3789
3790 len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
3791 /* 1. shortcuts */
3792 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3793 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3794 bp->func(&(bp->arg));
3795 return;
3796 }
3797 }
3798
3799 /* 2. custom keys from config.h */
3800 if((customkey = kmap(ksym, e->state))) {
3801 ttysend(customkey, strlen(customkey));
3802 return;
3803 }
3804
3805 /* 3. composed string from input method */
3806 if(len == 0)
3807 return;
3808 if(len == 1 && e->state & Mod1Mask) {
3809 if(IS_SET(MODE_8BIT)) {
3810 if(*buf < 0177) {
3811 c = *buf | 0x80;
3812 len = utf8encode(c, buf, UTF_SIZ);
3813 }
3814 } else {
3815 buf[1] = buf[0];
3816 buf[0] = '\033';
3817 len = 2;
3818 }
3819 }
3820 ttysend(buf, len);
3821 }
3822
3823
3824 void
3825 cmessage(XEvent *e) {
3826 /*
3827 * See xembed specs
3828 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3829 */
3830 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3831 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3832 xw.state |= WIN_FOCUSED;
3833 xseturgency(0);
3834 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3835 xw.state &= ~WIN_FOCUSED;
3836 }
3837 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3838 /* Send SIGHUP to shell */
3839 kill(pid, SIGHUP);
3840 exit(EXIT_SUCCESS);
3841 }
3842 }
3843
3844 void
3845 cresize(int width, int height) {
3846 int col, row;
3847
3848 if(width != 0)
3849 xw.w = width;
3850 if(height != 0)
3851 xw.h = height;
3852
3853 col = (xw.w - 2 * borderpx) / xw.cw;
3854 row = (xw.h - 2 * borderpx) / xw.ch;
3855
3856 tresize(col, row);
3857 xresize(col, row);
3858 ttyresize();
3859 }
3860
3861 void
3862 resize(XEvent *e) {
3863 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3864 return;
3865
3866 cresize(e->xconfigure.width, e->xconfigure.height);
3867 }
3868
3869 void
3870 run(void) {
3871 XEvent ev;
3872 int w = xw.w, h = xw.h;
3873 fd_set rfd;
3874 int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3875 struct timespec drawtimeout, *tv = NULL, now, last, lastblink;
3876 long deltatime;
3877
3878 /* Waiting for window mapping */
3879 while(1) {
3880 XNextEvent(xw.dpy, &ev);
3881 if(XFilterEvent(&ev, None))
3882 continue;
3883 if(ev.type == ConfigureNotify) {
3884 w = ev.xconfigure.width;
3885 h = ev.xconfigure.height;
3886 } else if(ev.type == MapNotify) {
3887 break;
3888 }
3889 }
3890
3891 ttynew();
3892 cresize(w, h);
3893
3894 clock_gettime(CLOCK_MONOTONIC, &last);
3895 lastblink = last;
3896
3897 for(xev = actionfps;;) {
3898 FD_ZERO(&rfd);
3899 FD_SET(cmdfd, &rfd);
3900 FD_SET(xfd, &rfd);
3901
3902 if(pselect(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv, NULL) < 0) {
3903 if(errno == EINTR)
3904 continue;
3905 die("select failed: %s\n", strerror(errno));
3906 }
3907 if(FD_ISSET(cmdfd, &rfd)) {
3908 ttyread();
3909 if(blinktimeout) {
3910 blinkset = tattrset(ATTR_BLINK);
3911 if(!blinkset)
3912 MODBIT(term.mode, 0, MODE_BLINK);
3913 }
3914 }
3915
3916 if(FD_ISSET(xfd, &rfd))
3917 xev = actionfps;
3918
3919 clock_gettime(CLOCK_MONOTONIC, &now);
3920 drawtimeout.tv_sec = 0;
3921 drawtimeout.tv_nsec = (1000/xfps) * 1E6;
3922 tv = &drawtimeout;
3923
3924 dodraw = 0;
3925 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
3926 tsetdirtattr(ATTR_BLINK);
3927 term.mode ^= MODE_BLINK;
3928 lastblink = now;
3929 dodraw = 1;
3930 }
3931 deltatime = TIMEDIFF(now, last);
3932 if(deltatime > (xev? (1000/xfps) : (1000/actionfps))
3933 || deltatime < 0) {
3934 dodraw = 1;
3935 last = now;
3936 }
3937
3938 if(dodraw) {
3939 while(XPending(xw.dpy)) {
3940 XNextEvent(xw.dpy, &ev);
3941 if(XFilterEvent(&ev, None))
3942 continue;
3943 if(handler[ev.type])
3944 (handler[ev.type])(&ev);
3945 }
3946
3947 draw();
3948 XFlush(xw.dpy);
3949
3950 if(xev && !FD_ISSET(xfd, &rfd))
3951 xev--;
3952 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
3953 if(blinkset) {
3954 if(TIMEDIFF(now, lastblink) \
3955 > blinktimeout) {
3956 drawtimeout.tv_nsec = 1000;
3957 } else {
3958 drawtimeout.tv_nsec = (1E6 * \
3959 (blinktimeout - \
3960 TIMEDIFF(now,
3961 lastblink)));
3962 }
3963 drawtimeout.tv_sec = \
3964 drawtimeout.tv_nsec / 1E9;
3965 drawtimeout.tv_nsec %= (long)1E9;
3966 } else {
3967 tv = NULL;
3968 }
3969 }
3970 }
3971 }
3972 }
3973
3974 void
3975 usage(void) {
3976 die("%s " VERSION " (c) 2010-2015 st engineers\n" \
3977 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]\n"
3978 " [-i] [-t title] [-w windowid] [-e command ...]\n", argv0);
3979 }
3980
3981 int
3982 main(int argc, char *argv[]) {
3983 char *titles;
3984 uint cols = 80, rows = 24;
3985
3986 xw.l = xw.t = 0;
3987 xw.isfixed = False;
3988
3989 ARGBEGIN {
3990 case 'a':
3991 allowaltscreen = false;
3992 break;
3993 case 'c':
3994 opt_class = EARGF(usage());
3995 break;
3996 case 'e':
3997 /* eat all remaining arguments */
3998 if(argc > 1) {
3999 opt_cmd = &argv[1];
4000 if(argv[1] != NULL && opt_title == NULL) {
4001 titles = xstrdup(argv[1]);
4002 opt_title = basename(titles);
4003 }
4004 }
4005 goto run;
4006 case 'f':
4007 opt_font = EARGF(usage());
4008 break;
4009 case 'g':
4010 xw.gm = XParseGeometry(EARGF(usage()),
4011 &xw.l, &xw.t, &cols, &rows);
4012 break;
4013 case 'i':
4014 xw.isfixed = True;
4015 break;
4016 case 'o':
4017 opt_io = EARGF(usage());
4018 break;
4019 case 't':
4020 opt_title = EARGF(usage());
4021 break;
4022 case 'w':
4023 opt_embed = EARGF(usage());
4024 break;
4025 case 'v':
4026 default:
4027 usage();
4028 } ARGEND;
4029
4030 run:
4031 setlocale(LC_CTYPE, "");
4032 XSetLocaleModifiers("");
4033 tnew(cols? cols : 1, rows? rows : 1);
4034 xinit();
4035 selinit();
4036 run();
4037
4038 return 0;
4039 }
4040