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Don't treat clauses like functions
[st.git] / st.c
1 /* See LICENSE for license details. */
2 #include <ctype.h>
3 #include <errno.h>
4 #include <fcntl.h>
5 #include <limits.h>
6 #include <locale.h>
7 #include <pwd.h>
8 #include <stdarg.h>
9 #include <stdio.h>
10 #include <stdlib.h>
11 #include <string.h>
12 #include <signal.h>
13 #include <stdint.h>
14 #include <sys/ioctl.h>
15 #include <sys/select.h>
16 #include <sys/stat.h>
17 #include <sys/time.h>
18 #include <sys/types.h>
19 #include <sys/wait.h>
20 #include <time.h>
21 #include <unistd.h>
22 #include <libgen.h>
23 #include <X11/Xatom.h>
24 #include <X11/Xlib.h>
25 #include <X11/Xutil.h>
26 #include <X11/cursorfont.h>
27 #include <X11/keysym.h>
28 #include <X11/Xft/Xft.h>
29 #include <X11/XKBlib.h>
30 #include <fontconfig/fontconfig.h>
31 #include <wchar.h>
32
33 #include "arg.h"
34
35 char *argv0;
36
37 #define Glyph Glyph_
38 #define Font Font_
39
40 #if defined(__linux)
41 #include <pty.h>
42 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
43 #include <util.h>
44 #elif defined(__FreeBSD__) || defined(__DragonFly__)
45 #include <libutil.h>
46 #endif
47
48
49 /* XEMBED messages */
50 #define XEMBED_FOCUS_IN 4
51 #define XEMBED_FOCUS_OUT 5
52
53 /* Arbitrary sizes */
54 #define UTF_INVALID 0xFFFD
55 #define UTF_SIZ 4
56 #define ESC_BUF_SIZ (128*UTF_SIZ)
57 #define ESC_ARG_SIZ 16
58 #define STR_BUF_SIZ ESC_BUF_SIZ
59 #define STR_ARG_SIZ ESC_ARG_SIZ
60 #define XK_ANY_MOD UINT_MAX
61 #define XK_NO_MOD 0
62 #define XK_SWITCH_MOD (1<<13)
63
64 /* macros */
65 #define MIN(a, b) ((a) < (b) ? (a) : (b))
66 #define MAX(a, b) ((a) < (b) ? (b) : (a))
67 #define LEN(a) (sizeof(a) / sizeof(a)[0])
68 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
69 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
70 #define ISCONTROLC0(c) (BETWEEN(c, 0, 0x1f) || (c) == '\177')
71 #define ISCONTROLC1(c) (BETWEEN(c, 0x80, 0x9f))
72 #define ISCONTROL(c) (ISCONTROLC0(c) || ISCONTROLC1(c))
73 #define ISDELIM(u) (utf8strchr(worddelimiters, u) != NULL)
74 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
75 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
76 #define IS_SET(flag) ((term.mode & (flag)) != 0)
77 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_nsec-t2.tv_nsec)/1E6)
78 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
79
80 #define TRUECOLOR(r,g,b) (1 << 24 | (r) << 16 | (g) << 8 | (b))
81 #define IS_TRUECOL(x) (1 << 24 & (x))
82 #define TRUERED(x) (((x) & 0xff0000) >> 8)
83 #define TRUEGREEN(x) (((x) & 0xff00))
84 #define TRUEBLUE(x) (((x) & 0xff) << 8)
85
86
87 enum glyph_attribute {
88 ATTR_NULL = 0,
89 ATTR_BOLD = 1 << 0,
90 ATTR_FAINT = 1 << 1,
91 ATTR_ITALIC = 1 << 2,
92 ATTR_UNDERLINE = 1 << 3,
93 ATTR_BLINK = 1 << 4,
94 ATTR_REVERSE = 1 << 5,
95 ATTR_INVISIBLE = 1 << 6,
96 ATTR_STRUCK = 1 << 7,
97 ATTR_WRAP = 1 << 8,
98 ATTR_WIDE = 1 << 9,
99 ATTR_WDUMMY = 1 << 10,
100 ATTR_BOLD_FAINT = ATTR_BOLD | ATTR_FAINT,
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_FOCUSED = 2
162 };
163
164 enum selection_mode {
165 SEL_IDLE = 0,
166 SEL_EMPTY = 1,
167 SEL_READY = 2
168 };
169
170 enum selection_type {
171 SEL_REGULAR = 1,
172 SEL_RECTANGULAR = 2
173 };
174
175 enum selection_snap {
176 SNAP_WORD = 1,
177 SNAP_LINE = 2
178 };
179
180 typedef unsigned char uchar;
181 typedef unsigned int uint;
182 typedef unsigned long ulong;
183 typedef unsigned short ushort;
184
185 typedef uint_least32_t Rune;
186
187 typedef XftDraw *Draw;
188 typedef XftColor Color;
189
190 typedef struct {
191 Rune u; /* character code */
192 ushort mode; /* attribute flags */
193 uint32_t fg; /* foreground */
194 uint32_t bg; /* background */
195 } Glyph;
196
197 typedef Glyph *Line;
198
199 typedef struct {
200 Glyph attr; /* current char attributes */
201 int x;
202 int y;
203 char state;
204 } TCursor;
205
206 /* CSI Escape sequence structs */
207 /* ESC '[' [[ [<priv>] <arg> [;]] <mode> [<mode>]] */
208 typedef struct {
209 char buf[ESC_BUF_SIZ]; /* raw string */
210 int len; /* raw string length */
211 char priv;
212 int arg[ESC_ARG_SIZ];
213 int narg; /* nb of args */
214 char mode[2];
215 } CSIEscape;
216
217 /* STR Escape sequence structs */
218 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
219 typedef struct {
220 char type; /* ESC type ... */
221 char buf[STR_BUF_SIZ]; /* raw string */
222 int len; /* raw string length */
223 char *args[STR_ARG_SIZ];
224 int narg; /* nb of args */
225 } STREscape;
226
227 /* Internal representation of the screen */
228 typedef struct {
229 int row; /* nb row */
230 int col; /* nb col */
231 Line *line; /* screen */
232 Line *alt; /* alternate screen */
233 int *dirty; /* dirtyness of lines */
234 XftGlyphFontSpec *specbuf; /* font spec buffer used for rendering */
235 TCursor c; /* cursor */
236 int top; /* top scroll limit */
237 int bot; /* bottom scroll limit */
238 int mode; /* terminal mode flags */
239 int esc; /* escape state flags */
240 char trantbl[4]; /* charset table translation */
241 int charset; /* current charset */
242 int icharset; /* selected charset for sequence */
243 int numlock; /* lock numbers in keyboard */
244 int *tabs;
245 } Term;
246
247 /* Purely graphic info */
248 typedef struct {
249 Display *dpy;
250 Colormap cmap;
251 Window win;
252 Drawable buf;
253 Atom xembed, wmdeletewin, netwmname, netwmpid;
254 XIM xim;
255 XIC xic;
256 Draw draw;
257 Visual *vis;
258 XSetWindowAttributes attrs;
259 int scr;
260 int isfixed; /* is fixed geometry? */
261 int l, t; /* left and top offset */
262 int gm; /* geometry mask */
263 int tw, th; /* tty width and height */
264 int w, h; /* window width and height */
265 int ch; /* char height */
266 int cw; /* char width */
267 char state; /* focus, redraw, visible */
268 int cursor; /* cursor style */
269 } XWindow;
270
271 typedef struct {
272 uint b;
273 uint mask;
274 char *s;
275 } Mousekey;
276
277 typedef struct {
278 KeySym k;
279 uint mask;
280 char *s;
281 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
282 signed char appkey; /* application keypad */
283 signed char appcursor; /* application cursor */
284 signed char crlf; /* crlf mode */
285 } Key;
286
287 typedef struct {
288 int mode;
289 int type;
290 int snap;
291 /*
292 * Selection variables:
293 * nb – normalized coordinates of the beginning of the selection
294 * ne – normalized coordinates of the end of the selection
295 * ob – original coordinates of the beginning of the selection
296 * oe – original coordinates of the end of the selection
297 */
298 struct {
299 int x, y;
300 } nb, ne, ob, oe;
301
302 char *primary, *clipboard;
303 Atom xtarget;
304 int alt;
305 struct timespec tclick1;
306 struct timespec tclick2;
307 } Selection;
308
309 typedef union {
310 int i;
311 uint ui;
312 float f;
313 const void *v;
314 } Arg;
315
316 typedef struct {
317 uint mod;
318 KeySym keysym;
319 void (*func)(const Arg *);
320 const Arg arg;
321 } Shortcut;
322
323 /* function definitions used in config.h */
324 static void clipcopy(const Arg *);
325 static void clippaste(const Arg *);
326 static void numlock(const Arg *);
327 static void selpaste(const Arg *);
328 static void xzoom(const Arg *);
329 static void xzoomabs(const Arg *);
330 static void xzoomreset(const Arg *);
331 static void printsel(const Arg *);
332 static void printscreen(const Arg *) ;
333 static void toggleprinter(const Arg *);
334
335 /* Config.h for applying patches and the configuration. */
336 #include "config.h"
337
338 /* Font structure */
339 typedef struct {
340 int height;
341 int width;
342 int ascent;
343 int descent;
344 short lbearing;
345 short rbearing;
346 XftFont *match;
347 FcFontSet *set;
348 FcPattern *pattern;
349 } Font;
350
351 /* Drawing Context */
352 typedef struct {
353 Color col[MAX(LEN(colorname), 256)];
354 Font font, bfont, ifont, ibfont;
355 GC gc;
356 } DC;
357
358 static void die(const char *, ...);
359 static void draw(void);
360 static void redraw(void);
361 static void drawregion(int, int, int, int);
362 static void execsh(void);
363 static void stty(void);
364 static void sigchld(int);
365 static void run(void);
366
367 static void csidump(void);
368 static void csihandle(void);
369 static void csiparse(void);
370 static void csireset(void);
371 static int eschandle(uchar);
372 static void strdump(void);
373 static void strhandle(void);
374 static void strparse(void);
375 static void strreset(void);
376
377 static int tattrset(int);
378 static void tprinter(char *, size_t);
379 static void tdumpsel(void);
380 static void tdumpline(int);
381 static void tdump(void);
382 static void tclearregion(int, int, int, int);
383 static void tcursor(int);
384 static void tdeletechar(int);
385 static void tdeleteline(int);
386 static void tinsertblank(int);
387 static void tinsertblankline(int);
388 static int tlinelen(int);
389 static void tmoveto(int, int);
390 static void tmoveato(int, int);
391 static void tnew(int, int);
392 static void tnewline(int);
393 static void tputtab(int);
394 static void tputc(Rune);
395 static void treset(void);
396 static void tresize(int, int);
397 static void tscrollup(int, int);
398 static void tscrolldown(int, int);
399 static void tsetattr(int *, int);
400 static void tsetchar(Rune, Glyph *, int, int);
401 static void tsetscroll(int, int);
402 static void tswapscreen(void);
403 static void tsetdirt(int, int);
404 static void tsetdirtattr(int);
405 static void tsetmode(int, int, int *, int);
406 static void tfulldirt(void);
407 static void techo(Rune);
408 static void tcontrolcode(uchar );
409 static void tdectest(char );
410 static int32_t tdefcolor(int *, int *, int);
411 static void tdeftran(char);
412 static inline int match(uint, uint);
413 static void ttynew(void);
414 static void ttyread(void);
415 static void ttyresize(void);
416 static void ttysend(char *, size_t);
417 static void ttywrite(const char *, size_t);
418 static void tstrsequence(uchar);
419
420 static inline ushort sixd_to_16bit(int);
421 static int xmakeglyphfontspecs(XftGlyphFontSpec *, const Glyph *, int, int, int);
422 static void xdrawglyphfontspecs(const XftGlyphFontSpec *, Glyph, int, int, int);
423 static void xdrawglyph(Glyph, int, int);
424 static void xhints(void);
425 static void xclear(int, int, int, int);
426 static void xdrawcursor(void);
427 static void xinit(void);
428 static void xloadcols(void);
429 static int xsetcolorname(int, const char *);
430 static int xgeommasktogravity(int);
431 static int xloadfont(Font *, FcPattern *);
432 static void xloadfonts(char *, double);
433 static void xsettitle(char *);
434 static void xresettitle(void);
435 static void xsetpointermotion(int);
436 static void xseturgency(int);
437 static void xsetsel(char *, Time);
438 static void xtermclear(int, int, int, int);
439 static void xunloadfont(Font *);
440 static void xunloadfonts(void);
441 static void xresize(int, int);
442
443 static void expose(XEvent *);
444 static void visibility(XEvent *);
445 static void unmap(XEvent *);
446 static char *kmap(KeySym, uint);
447 static void kpress(XEvent *);
448 static void cmessage(XEvent *);
449 static void cresize(int, int);
450 static void resize(XEvent *);
451 static void focus(XEvent *);
452 static void brelease(XEvent *);
453 static void bpress(XEvent *);
454 static void bmotion(XEvent *);
455 static void selnotify(XEvent *);
456 static void selclear(XEvent *);
457 static void selrequest(XEvent *);
458
459 static void selinit(void);
460 static void selnormalize(void);
461 static inline int selected(int, int);
462 static char *getsel(void);
463 static void selcopy(Time);
464 static void selscroll(int, int);
465 static void selsnap(int *, int *, int);
466 static int x2col(int);
467 static int y2row(int);
468 static void getbuttoninfo(XEvent *);
469 static void mousereport(XEvent *);
470
471 static size_t utf8decode(char *, Rune *, size_t);
472 static Rune utf8decodebyte(char, size_t *);
473 static size_t utf8encode(Rune, char *);
474 static char utf8encodebyte(Rune, size_t);
475 static char *utf8strchr(char *s, Rune u);
476 static size_t utf8validate(Rune *, size_t);
477
478 static ssize_t xwrite(int, const char *, size_t);
479 static void *xmalloc(size_t);
480 static void *xrealloc(void *, size_t);
481 static char *xstrdup(char *);
482
483 static void usage(void);
484
485 static void (*handler[LASTEvent])(XEvent *) = {
486 [KeyPress] = kpress,
487 [ClientMessage] = cmessage,
488 [ConfigureNotify] = resize,
489 [VisibilityNotify] = visibility,
490 [UnmapNotify] = unmap,
491 [Expose] = expose,
492 [FocusIn] = focus,
493 [FocusOut] = focus,
494 [MotionNotify] = bmotion,
495 [ButtonPress] = bpress,
496 [ButtonRelease] = brelease,
497 /*
498 * Uncomment if you want the selection to disappear when you select something
499 * different in another window.
500 */
501 /* [SelectionClear] = selclear, */
502 [SelectionNotify] = selnotify,
503 [SelectionRequest] = selrequest,
504 };
505
506 /* Globals */
507 static DC dc;
508 static XWindow xw;
509 static Term term;
510 static CSIEscape csiescseq;
511 static STREscape strescseq;
512 static int cmdfd;
513 static pid_t pid;
514 static Selection sel;
515 static int iofd = 1;
516 static char **opt_cmd = NULL;
517 static char *opt_io = NULL;
518 static char *opt_title = NULL;
519 static char *opt_embed = NULL;
520 static char *opt_class = NULL;
521 static char *opt_font = NULL;
522 static char *opt_line = NULL;
523 static int oldbutton = 3; /* button event on startup: 3 = release */
524
525 static char *usedfont = NULL;
526 static double usedfontsize = 0;
527 static double defaultfontsize = 0;
528
529 static uchar utfbyte[UTF_SIZ + 1] = {0x80, 0, 0xC0, 0xE0, 0xF0};
530 static uchar utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
531 static Rune utfmin[UTF_SIZ + 1] = { 0, 0, 0x80, 0x800, 0x10000};
532 static Rune utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
533
534 /* Font Ring Cache */
535 enum {
536 FRC_NORMAL,
537 FRC_ITALIC,
538 FRC_BOLD,
539 FRC_ITALICBOLD
540 };
541
542 typedef struct {
543 XftFont *font;
544 int flags;
545 Rune unicodep;
546 } Fontcache;
547
548 /* Fontcache is an array now. A new font will be appended to the array. */
549 static Fontcache frc[16];
550 static int frclen = 0;
551
552 ssize_t
553 xwrite(int fd, const char *s, size_t len)
554 {
555 size_t aux = len;
556
557 while (len > 0) {
558 ssize_t r = write(fd, s, len);
559 if (r < 0)
560 return r;
561 len -= r;
562 s += r;
563 }
564 return aux;
565 }
566
567 void *
568 xmalloc(size_t len)
569 {
570 void *p = malloc(len);
571
572 if (!p)
573 die("Out of memory\n");
574
575 return p;
576 }
577
578 void *
579 xrealloc(void *p, size_t len)
580 {
581 if ((p = realloc(p, len)) == NULL)
582 die("Out of memory\n");
583
584 return p;
585 }
586
587 char *
588 xstrdup(char *s)
589 {
590 if ((s = strdup(s)) == NULL)
591 die("Out of memory\n");
592
593 return s;
594 }
595
596 size_t
597 utf8decode(char *c, Rune *u, size_t clen)
598 {
599 size_t i, j, len, type;
600 Rune udecoded;
601
602 *u = UTF_INVALID;
603 if (!clen)
604 return 0;
605 udecoded = utf8decodebyte(c[0], &len);
606 if (!BETWEEN(len, 1, UTF_SIZ))
607 return 1;
608 for (i = 1, j = 1; i < clen && j < len; ++i, ++j) {
609 udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
610 if (type != 0)
611 return j;
612 }
613 if (j < len)
614 return 0;
615 *u = udecoded;
616 utf8validate(u, len);
617 return len;
618 }
619
620 Rune
621 utf8decodebyte(char c, size_t *i)
622 {
623 for (*i = 0; *i < LEN(utfmask); ++(*i))
624 if (((uchar)c & utfmask[*i]) == utfbyte[*i])
625 return (uchar)c & ~utfmask[*i];
626 return 0;
627 }
628
629 size_t
630 utf8encode(Rune u, char *c)
631 {
632 size_t len, i;
633
634 len = utf8validate(&u, 0);
635 if (len > UTF_SIZ)
636 return 0;
637 for (i = len - 1; i != 0; --i) {
638 c[i] = utf8encodebyte(u, 0);
639 u >>= 6;
640 }
641 c[0] = utf8encodebyte(u, len);
642 return len;
643 }
644
645 char
646 utf8encodebyte(Rune u, size_t i)
647 {
648 return utfbyte[i] | (u & ~utfmask[i]);
649 }
650
651 char *
652 utf8strchr(char *s, Rune u)
653 {
654 Rune r;
655 size_t i, j, len;
656
657 len = strlen(s);
658 for (i = 0, j = 0; i < len; i += j) {
659 if (!(j = utf8decode(&s[i], &r, len - i)))
660 break;
661 if (r == u)
662 return &(s[i]);
663 }
664 return NULL;
665 }
666
667 size_t
668 utf8validate(Rune *u, size_t i)
669 {
670 if (!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF))
671 *u = UTF_INVALID;
672 for (i = 1; *u > utfmax[i]; ++i)
673 ;
674 return i;
675 }
676
677 void
678 selinit(void)
679 {
680 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
681 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
682 sel.mode = SEL_IDLE;
683 sel.ob.x = -1;
684 sel.primary = NULL;
685 sel.clipboard = NULL;
686 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
687 if (sel.xtarget == None)
688 sel.xtarget = XA_STRING;
689 }
690
691 int
692 x2col(int x)
693 {
694 x -= borderpx;
695 x /= xw.cw;
696
697 return LIMIT(x, 0, term.col-1);
698 }
699
700 int
701 y2row(int y)
702 {
703 y -= borderpx;
704 y /= xw.ch;
705
706 return LIMIT(y, 0, term.row-1);
707 }
708
709 int
710 tlinelen(int y)
711 {
712 int i = term.col;
713
714 if (term.line[y][i - 1].mode & ATTR_WRAP)
715 return i;
716
717 while (i > 0 && term.line[y][i - 1].u == ' ')
718 --i;
719
720 return i;
721 }
722
723 void
724 selnormalize(void)
725 {
726 int i;
727
728 if (sel.type == SEL_REGULAR && sel.ob.y != sel.oe.y) {
729 sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
730 sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
731 } else {
732 sel.nb.x = MIN(sel.ob.x, sel.oe.x);
733 sel.ne.x = MAX(sel.ob.x, sel.oe.x);
734 }
735 sel.nb.y = MIN(sel.ob.y, sel.oe.y);
736 sel.ne.y = MAX(sel.ob.y, sel.oe.y);
737
738 selsnap(&sel.nb.x, &sel.nb.y, -1);
739 selsnap(&sel.ne.x, &sel.ne.y, +1);
740
741 /* expand selection over line breaks */
742 if (sel.type == SEL_RECTANGULAR)
743 return;
744 i = tlinelen(sel.nb.y);
745 if (i < sel.nb.x)
746 sel.nb.x = i;
747 if (tlinelen(sel.ne.y) <= sel.ne.x)
748 sel.ne.x = term.col - 1;
749 }
750
751 int
752 selected(int x, int y)
753 {
754 if (sel.mode == SEL_EMPTY)
755 return 0;
756
757 if (sel.type == SEL_RECTANGULAR)
758 return BETWEEN(y, sel.nb.y, sel.ne.y)
759 && BETWEEN(x, sel.nb.x, sel.ne.x);
760
761 return BETWEEN(y, sel.nb.y, sel.ne.y)
762 && (y != sel.nb.y || x >= sel.nb.x)
763 && (y != sel.ne.y || x <= sel.ne.x);
764 }
765
766 void
767 selsnap(int *x, int *y, int direction)
768 {
769 int newx, newy, xt, yt;
770 int delim, prevdelim;
771 Glyph *gp, *prevgp;
772
773 switch (sel.snap) {
774 case SNAP_WORD:
775 /*
776 * Snap around if the word wraps around at the end or
777 * beginning of a line.
778 */
779 prevgp = &term.line[*y][*x];
780 prevdelim = ISDELIM(prevgp->u);
781 for (;;) {
782 newx = *x + direction;
783 newy = *y;
784 if (!BETWEEN(newx, 0, term.col - 1)) {
785 newy += direction;
786 newx = (newx + term.col) % term.col;
787 if (!BETWEEN(newy, 0, term.row - 1))
788 break;
789
790 if (direction > 0)
791 yt = *y, xt = *x;
792 else
793 yt = newy, xt = newx;
794 if (!(term.line[yt][xt].mode & ATTR_WRAP))
795 break;
796 }
797
798 if (newx >= tlinelen(newy))
799 break;
800
801 gp = &term.line[newy][newx];
802 delim = ISDELIM(gp->u);
803 if (!(gp->mode & ATTR_WDUMMY) && (delim != prevdelim
804 || (delim && gp->u != prevgp->u)))
805 break;
806
807 *x = newx;
808 *y = newy;
809 prevgp = gp;
810 prevdelim = delim;
811 }
812 break;
813 case SNAP_LINE:
814 /*
815 * Snap around if the the previous line or the current one
816 * has set ATTR_WRAP at its end. Then the whole next or
817 * previous line will be selected.
818 */
819 *x = (direction < 0) ? 0 : term.col - 1;
820 if (direction < 0) {
821 for (; *y > 0; *y += direction) {
822 if (!(term.line[*y-1][term.col-1].mode
823 & ATTR_WRAP)) {
824 break;
825 }
826 }
827 } else if (direction > 0) {
828 for (; *y < term.row-1; *y += direction) {
829 if (!(term.line[*y][term.col-1].mode
830 & ATTR_WRAP)) {
831 break;
832 }
833 }
834 }
835 break;
836 }
837 }
838
839 void
840 getbuttoninfo(XEvent *e)
841 {
842 int type;
843 uint state = e->xbutton.state & ~(Button1Mask | forceselmod);
844
845 sel.alt = IS_SET(MODE_ALTSCREEN);
846
847 sel.oe.x = x2col(e->xbutton.x);
848 sel.oe.y = y2row(e->xbutton.y);
849 selnormalize();
850
851 sel.type = SEL_REGULAR;
852 for (type = 1; type < LEN(selmasks); ++type) {
853 if (match(selmasks[type], state)) {
854 sel.type = type;
855 break;
856 }
857 }
858 }
859
860 void
861 mousereport(XEvent *e)
862 {
863 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
864 button = e->xbutton.button, state = e->xbutton.state,
865 len;
866 char buf[40];
867 static int ox, oy;
868
869 /* from urxvt */
870 if (e->xbutton.type == MotionNotify) {
871 if (x == ox && y == oy)
872 return;
873 if (!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
874 return;
875 /* MOUSE_MOTION: no reporting if no button is pressed */
876 if (IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
877 return;
878
879 button = oldbutton + 32;
880 ox = x;
881 oy = y;
882 } else {
883 if (!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
884 button = 3;
885 } else {
886 button -= Button1;
887 if (button >= 3)
888 button += 64 - 3;
889 }
890 if (e->xbutton.type == ButtonPress) {
891 oldbutton = button;
892 ox = x;
893 oy = y;
894 } else if (e->xbutton.type == ButtonRelease) {
895 oldbutton = 3;
896 /* MODE_MOUSEX10: no button release reporting */
897 if (IS_SET(MODE_MOUSEX10))
898 return;
899 if (button == 64 || button == 65)
900 return;
901 }
902 }
903
904 if (!IS_SET(MODE_MOUSEX10)) {
905 button += ((state & ShiftMask ) ? 4 : 0)
906 + ((state & Mod4Mask ) ? 8 : 0)
907 + ((state & ControlMask) ? 16 : 0);
908 }
909
910 if (IS_SET(MODE_MOUSESGR)) {
911 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
912 button, x+1, y+1,
913 e->xbutton.type == ButtonRelease ? 'm' : 'M');
914 } else if (x < 223 && y < 223) {
915 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
916 32+button, 32+x+1, 32+y+1);
917 } else {
918 return;
919 }
920
921 ttywrite(buf, len);
922 }
923
924 void
925 bpress(XEvent *e)
926 {
927 struct timespec now;
928 Mousekey *mk;
929
930 if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
931 mousereport(e);
932 return;
933 }
934
935 for (mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
936 if (e->xbutton.button == mk->b
937 && match(mk->mask, e->xbutton.state)) {
938 ttysend(mk->s, strlen(mk->s));
939 return;
940 }
941 }
942
943 if (e->xbutton.button == Button1) {
944 clock_gettime(CLOCK_MONOTONIC, &now);
945
946 /* Clear previous selection, logically and visually. */
947 selclear(NULL);
948 sel.mode = SEL_EMPTY;
949 sel.type = SEL_REGULAR;
950 sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
951 sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
952
953 /*
954 * If the user clicks below predefined timeouts specific
955 * snapping behaviour is exposed.
956 */
957 if (TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
958 sel.snap = SNAP_LINE;
959 } else if (TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
960 sel.snap = SNAP_WORD;
961 } else {
962 sel.snap = 0;
963 }
964 selnormalize();
965
966 if (sel.snap != 0)
967 sel.mode = SEL_READY;
968 tsetdirt(sel.nb.y, sel.ne.y);
969 sel.tclick2 = sel.tclick1;
970 sel.tclick1 = now;
971 }
972 }
973
974 char *
975 getsel(void)
976 {
977 char *str, *ptr;
978 int y, bufsize, lastx, linelen;
979 Glyph *gp, *last;
980
981 if (sel.ob.x == -1)
982 return NULL;
983
984 bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
985 ptr = str = xmalloc(bufsize);
986
987 /* append every set & selected glyph to the selection */
988 for (y = sel.nb.y; y <= sel.ne.y; y++) {
989 linelen = tlinelen(y);
990
991 if (sel.type == SEL_RECTANGULAR) {
992 gp = &term.line[y][sel.nb.x];
993 lastx = sel.ne.x;
994 } else {
995 gp = &term.line[y][sel.nb.y == y ? sel.nb.x : 0];
996 lastx = (sel.ne.y == y) ? sel.ne.x : term.col-1;
997 }
998 last = &term.line[y][MIN(lastx, linelen-1)];
999 while (last >= gp && last->u == ' ')
1000 --last;
1001
1002 for ( ; gp <= last; ++gp) {
1003 if (gp->mode & ATTR_WDUMMY)
1004 continue;
1005
1006 ptr += utf8encode(gp->u, ptr);
1007 }
1008
1009 /*
1010 * Copy and pasting of line endings is inconsistent
1011 * in the inconsistent terminal and GUI world.
1012 * The best solution seems like to produce '\n' when
1013 * something is copied from st and convert '\n' to
1014 * '\r', when something to be pasted is received by
1015 * st.
1016 * FIXME: Fix the computer world.
1017 */
1018 if ((y < sel.ne.y || lastx >= linelen) && !(last->mode & ATTR_WRAP))
1019 *ptr++ = '\n';
1020 }
1021 *ptr = 0;
1022 return str;
1023 }
1024
1025 void
1026 selcopy(Time t)
1027 {
1028 xsetsel(getsel(), t);
1029 }
1030
1031 void
1032 selnotify(XEvent *e)
1033 {
1034 ulong nitems, ofs, rem;
1035 int format;
1036 uchar *data, *last, *repl;
1037 Atom type;
1038 XSelectionEvent *xsev;
1039
1040 ofs = 0;
1041 xsev = &e->xselection;
1042 if (xsev->property == None)
1043 return;
1044 do {
1045 if (XGetWindowProperty(xw.dpy, xw.win, xsev->property, ofs,
1046 BUFSIZ/4, False, AnyPropertyType,
1047 &type, &format, &nitems, &rem,
1048 &data)) {
1049 fprintf(stderr, "Clipboard allocation failed\n");
1050 return;
1051 }
1052
1053 /*
1054 * As seen in getsel:
1055 * Line endings are inconsistent in the terminal and GUI world
1056 * copy and pasting. When receiving some selection data,
1057 * replace all '\n' with '\r'.
1058 * FIXME: Fix the computer world.
1059 */
1060 repl = data;
1061 last = data + nitems * format / 8;
1062 while ((repl = memchr(repl, '\n', last - repl))) {
1063 *repl++ = '\r';
1064 }
1065
1066 if (IS_SET(MODE_BRCKTPASTE))
1067 ttywrite("\033[200~", 6);
1068 ttysend((char *)data, nitems * format / 8);
1069 if (IS_SET(MODE_BRCKTPASTE))
1070 ttywrite("\033[201~", 6);
1071 XFree(data);
1072 /* number of 32-bit chunks returned */
1073 ofs += nitems * format / 32;
1074 } while (rem > 0);
1075 }
1076
1077 void
1078 selpaste(const Arg *dummy)
1079 {
1080 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
1081 xw.win, CurrentTime);
1082 }
1083
1084 void
1085 clipcopy(const Arg *dummy)
1086 {
1087 Atom clipboard;
1088
1089 if (sel.clipboard != NULL)
1090 free(sel.clipboard);
1091
1092 if (sel.primary != NULL) {
1093 sel.clipboard = xstrdup(sel.primary);
1094 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1095 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
1096 }
1097 }
1098
1099 void
1100 clippaste(const Arg *dummy)
1101 {
1102 Atom clipboard;
1103
1104 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1105 XConvertSelection(xw.dpy, clipboard, sel.xtarget, clipboard,
1106 xw.win, CurrentTime);
1107 }
1108
1109 void
1110 selclear(XEvent *e)
1111 {
1112 if (sel.ob.x == -1)
1113 return;
1114 sel.mode = SEL_IDLE;
1115 sel.ob.x = -1;
1116 tsetdirt(sel.nb.y, sel.ne.y);
1117 }
1118
1119 void
1120 selrequest(XEvent *e)
1121 {
1122 XSelectionRequestEvent *xsre;
1123 XSelectionEvent xev;
1124 Atom xa_targets, string, clipboard;
1125 char *seltext;
1126
1127 xsre = (XSelectionRequestEvent *) e;
1128 xev.type = SelectionNotify;
1129 xev.requestor = xsre->requestor;
1130 xev.selection = xsre->selection;
1131 xev.target = xsre->target;
1132 xev.time = xsre->time;
1133 if (xsre->property == None)
1134 xsre->property = xsre->target;
1135
1136 /* reject */
1137 xev.property = None;
1138
1139 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
1140 if (xsre->target == xa_targets) {
1141 /* respond with the supported type */
1142 string = sel.xtarget;
1143 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1144 XA_ATOM, 32, PropModeReplace,
1145 (uchar *) &string, 1);
1146 xev.property = xsre->property;
1147 } else if (xsre->target == sel.xtarget || xsre->target == XA_STRING) {
1148 /*
1149 * xith XA_STRING non ascii characters may be incorrect in the
1150 * requestor. It is not our problem, use utf8.
1151 */
1152 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1153 if (xsre->selection == XA_PRIMARY) {
1154 seltext = sel.primary;
1155 } else if (xsre->selection == clipboard) {
1156 seltext = sel.clipboard;
1157 } else {
1158 fprintf(stderr,
1159 "Unhandled clipboard selection 0x%lx\n",
1160 xsre->selection);
1161 return;
1162 }
1163 if (seltext != NULL) {
1164 XChangeProperty(xsre->display, xsre->requestor,
1165 xsre->property, xsre->target,
1166 8, PropModeReplace,
1167 (uchar *)seltext, strlen(seltext));
1168 xev.property = xsre->property;
1169 }
1170 }
1171
1172 /* all done, send a notification to the listener */
1173 if (!XSendEvent(xsre->display, xsre->requestor, 1, 0, (XEvent *) &xev))
1174 fprintf(stderr, "Error sending SelectionNotify event\n");
1175 }
1176
1177 void
1178 xsetsel(char *str, Time t)
1179 {
1180 free(sel.primary);
1181 sel.primary = str;
1182
1183 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, t);
1184 if (XGetSelectionOwner(xw.dpy, XA_PRIMARY) != xw.win)
1185 selclear(0);
1186 }
1187
1188 void
1189 brelease(XEvent *e)
1190 {
1191 if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1192 mousereport(e);
1193 return;
1194 }
1195
1196 if (e->xbutton.button == Button2) {
1197 selpaste(NULL);
1198 } else if (e->xbutton.button == Button1) {
1199 if (sel.mode == SEL_READY) {
1200 getbuttoninfo(e);
1201 selcopy(e->xbutton.time);
1202 } else
1203 selclear(NULL);
1204 sel.mode = SEL_IDLE;
1205 tsetdirt(sel.nb.y, sel.ne.y);
1206 }
1207 }
1208
1209 void
1210 bmotion(XEvent *e)
1211 {
1212 int oldey, oldex, oldsby, oldsey;
1213
1214 if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1215 mousereport(e);
1216 return;
1217 }
1218
1219 if (!sel.mode)
1220 return;
1221
1222 sel.mode = SEL_READY;
1223 oldey = sel.oe.y;
1224 oldex = sel.oe.x;
1225 oldsby = sel.nb.y;
1226 oldsey = sel.ne.y;
1227 getbuttoninfo(e);
1228
1229 if (oldey != sel.oe.y || oldex != sel.oe.x)
1230 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
1231 }
1232
1233 void
1234 die(const char *errstr, ...)
1235 {
1236 va_list ap;
1237
1238 va_start(ap, errstr);
1239 vfprintf(stderr, errstr, ap);
1240 va_end(ap);
1241 exit(1);
1242 }
1243
1244 void
1245 execsh(void)
1246 {
1247 char **args, *sh, *prog;
1248 const struct passwd *pw;
1249 char buf[sizeof(long) * 8 + 1];
1250
1251 errno = 0;
1252 if ((pw = getpwuid(getuid())) == NULL) {
1253 if (errno)
1254 die("getpwuid:%s\n", strerror(errno));
1255 else
1256 die("who are you?\n");
1257 }
1258
1259 if (!(sh = getenv("SHELL"))) {
1260 sh = (pw->pw_shell[0]) ? pw->pw_shell : shell;
1261 }
1262
1263 if (opt_cmd)
1264 prog = opt_cmd[0];
1265 else if (utmp)
1266 prog = utmp;
1267 else
1268 prog = sh;
1269 args = (opt_cmd) ? opt_cmd : (char *[]) {prog, NULL};
1270
1271 snprintf(buf, sizeof(buf), "%lu", xw.win);
1272
1273 unsetenv("COLUMNS");
1274 unsetenv("LINES");
1275 unsetenv("TERMCAP");
1276 setenv("LOGNAME", pw->pw_name, 1);
1277 setenv("USER", pw->pw_name, 1);
1278 setenv("SHELL", sh, 1);
1279 setenv("HOME", pw->pw_dir, 1);
1280 setenv("TERM", termname, 1);
1281 setenv("WINDOWID", buf, 1);
1282
1283 signal(SIGCHLD, SIG_DFL);
1284 signal(SIGHUP, SIG_DFL);
1285 signal(SIGINT, SIG_DFL);
1286 signal(SIGQUIT, SIG_DFL);
1287 signal(SIGTERM, SIG_DFL);
1288 signal(SIGALRM, SIG_DFL);
1289
1290 execvp(prog, args);
1291 _exit(1);
1292 }
1293
1294 void
1295 sigchld(int a)
1296 {
1297 int stat;
1298 pid_t p;
1299
1300 if ((p = waitpid(pid, &stat, WNOHANG)) < 0)
1301 die("Waiting for pid %hd failed: %s\n", pid, strerror(errno));
1302
1303 if (pid != p)
1304 return;
1305
1306 if (!WIFEXITED(stat) || WEXITSTATUS(stat))
1307 die("child finished with error '%d'\n", stat);
1308 exit(0);
1309 }
1310
1311
1312 void
1313 stty(void)
1314 {
1315 char cmd[_POSIX_ARG_MAX], **p, *q, *s;
1316 size_t n, siz;
1317
1318 if ((n = strlen(stty_args)) > sizeof(cmd)-1)
1319 die("incorrect stty parameters\n");
1320 memcpy(cmd, stty_args, n);
1321 q = cmd + n;
1322 siz = sizeof(cmd) - n;
1323 for (p = opt_cmd; p && (s = *p); ++p) {
1324 if ((n = strlen(s)) > siz-1)
1325 die("stty parameter length too long\n");
1326 *q++ = ' ';
1327 q = memcpy(q, s, n);
1328 q += n;
1329 siz-= n + 1;
1330 }
1331 *q = '\0';
1332 if (system(cmd) != 0)
1333 perror("Couldn't call stty");
1334 }
1335
1336 void
1337 ttynew(void)
1338 {
1339 int m, s;
1340 struct winsize w = {term.row, term.col, 0, 0};
1341
1342 if (opt_io) {
1343 term.mode |= MODE_PRINT;
1344 iofd = (!strcmp(opt_io, "-")) ?
1345 1 : open(opt_io, O_WRONLY | O_CREAT, 0666);
1346 if (iofd < 0) {
1347 fprintf(stderr, "Error opening %s:%s\n",
1348 opt_io, strerror(errno));
1349 }
1350 }
1351
1352 if (opt_line) {
1353 if ((cmdfd = open(opt_line, O_RDWR)) < 0)
1354 die("open line failed: %s\n", strerror(errno));
1355 close(0);
1356 dup(cmdfd);
1357 stty();
1358 return;
1359 }
1360
1361 /* seems to work fine on linux, openbsd and freebsd */
1362 if (openpty(&m, &s, NULL, NULL, &w) < 0)
1363 die("openpty failed: %s\n", strerror(errno));
1364
1365 switch (pid = fork()) {
1366 case -1:
1367 die("fork failed\n");
1368 break;
1369 case 0:
1370 close(iofd);
1371 setsid(); /* create a new process group */
1372 dup2(s, 0);
1373 dup2(s, 1);
1374 dup2(s, 2);
1375 if (ioctl(s, TIOCSCTTY, NULL) < 0)
1376 die("ioctl TIOCSCTTY failed: %s\n", strerror(errno));
1377 close(s);
1378 close(m);
1379 execsh();
1380 break;
1381 default:
1382 close(s);
1383 cmdfd = m;
1384 signal(SIGCHLD, sigchld);
1385 break;
1386 }
1387 }
1388
1389 void
1390 ttyread(void)
1391 {
1392 static char buf[BUFSIZ];
1393 static int buflen = 0;
1394 char *ptr;
1395 int charsize; /* size of utf8 char in bytes */
1396 Rune unicodep;
1397 int ret;
1398
1399 /* append read bytes to unprocessed bytes */
1400 if ((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1401 die("Couldn't read from shell: %s\n", strerror(errno));
1402
1403 /* process every complete utf8 char */
1404 buflen += ret;
1405 ptr = buf;
1406 while ((charsize = utf8decode(ptr, &unicodep, buflen))) {
1407 tputc(unicodep);
1408 ptr += charsize;
1409 buflen -= charsize;
1410 }
1411
1412 /* keep any uncomplete utf8 char for the next call */
1413 memmove(buf, ptr, buflen);
1414 }
1415
1416 void
1417 ttywrite(const char *s, size_t n)
1418 {
1419 if (xwrite(cmdfd, s, n) == -1)
1420 die("write error on tty: %s\n", strerror(errno));
1421 }
1422
1423 void
1424 ttysend(char *s, size_t n)
1425 {
1426 int len;
1427 Rune u;
1428
1429 ttywrite(s, n);
1430 if (IS_SET(MODE_ECHO))
1431 while ((len = utf8decode(s, &u, n)) > 0) {
1432 techo(u);
1433 n -= len;
1434 s += len;
1435 }
1436 }
1437
1438 void
1439 ttyresize(void)
1440 {
1441 struct winsize w;
1442
1443 w.ws_row = term.row;
1444 w.ws_col = term.col;
1445 w.ws_xpixel = xw.tw;
1446 w.ws_ypixel = xw.th;
1447 if (ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1448 fprintf(stderr, "Couldn't set window size: %s\n", strerror(errno));
1449 }
1450
1451 int
1452 tattrset(int attr)
1453 {
1454 int i, j;
1455
1456 for (i = 0; i < term.row-1; i++) {
1457 for (j = 0; j < term.col-1; j++) {
1458 if (term.line[i][j].mode & attr)
1459 return 1;
1460 }
1461 }
1462
1463 return 0;
1464 }
1465
1466 void
1467 tsetdirt(int top, int bot)
1468 {
1469 int i;
1470
1471 LIMIT(top, 0, term.row-1);
1472 LIMIT(bot, 0, term.row-1);
1473
1474 for (i = top; i <= bot; i++)
1475 term.dirty[i] = 1;
1476 }
1477
1478 void
1479 tsetdirtattr(int attr)
1480 {
1481 int i, j;
1482
1483 for (i = 0; i < term.row-1; i++) {
1484 for (j = 0; j < term.col-1; j++) {
1485 if (term.line[i][j].mode & attr) {
1486 tsetdirt(i, i);
1487 break;
1488 }
1489 }
1490 }
1491 }
1492
1493 void
1494 tfulldirt(void)
1495 {
1496 tsetdirt(0, term.row-1);
1497 }
1498
1499 void
1500 tcursor(int mode)
1501 {
1502 static TCursor c[2];
1503 int alt = IS_SET(MODE_ALTSCREEN);
1504
1505 if (mode == CURSOR_SAVE) {
1506 c[alt] = term.c;
1507 } else if (mode == CURSOR_LOAD) {
1508 term.c = c[alt];
1509 tmoveto(c[alt].x, c[alt].y);
1510 }
1511 }
1512
1513 void
1514 treset(void)
1515 {
1516 uint i;
1517
1518 term.c = (TCursor){{
1519 .mode = ATTR_NULL,
1520 .fg = defaultfg,
1521 .bg = defaultbg
1522 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1523
1524 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1525 for (i = tabspaces; i < term.col; i += tabspaces)
1526 term.tabs[i] = 1;
1527 term.top = 0;
1528 term.bot = term.row - 1;
1529 term.mode = MODE_WRAP;
1530 memset(term.trantbl, CS_USA, sizeof(term.trantbl));
1531 term.charset = 0;
1532
1533 for (i = 0; i < 2; i++) {
1534 tmoveto(0, 0);
1535 tcursor(CURSOR_SAVE);
1536 tclearregion(0, 0, term.col-1, term.row-1);
1537 tswapscreen();
1538 }
1539 }
1540
1541 void
1542 tnew(int col, int row)
1543 {
1544 term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } };
1545 tresize(col, row);
1546 term.numlock = 1;
1547
1548 treset();
1549 }
1550
1551 void
1552 tswapscreen(void)
1553 {
1554 Line *tmp = term.line;
1555
1556 term.line = term.alt;
1557 term.alt = tmp;
1558 term.mode ^= MODE_ALTSCREEN;
1559 tfulldirt();
1560 }
1561
1562 void
1563 tscrolldown(int orig, int n)
1564 {
1565 int i;
1566 Line temp;
1567
1568 LIMIT(n, 0, term.bot-orig+1);
1569
1570 tsetdirt(orig, term.bot-n);
1571 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1572
1573 for (i = term.bot; i >= orig+n; i--) {
1574 temp = term.line[i];
1575 term.line[i] = term.line[i-n];
1576 term.line[i-n] = temp;
1577 }
1578
1579 selscroll(orig, n);
1580 }
1581
1582 void
1583 tscrollup(int orig, int n)
1584 {
1585 int i;
1586 Line temp;
1587
1588 LIMIT(n, 0, term.bot-orig+1);
1589
1590 tclearregion(0, orig, term.col-1, orig+n-1);
1591 tsetdirt(orig+n, term.bot);
1592
1593 for (i = orig; i <= term.bot-n; i++) {
1594 temp = term.line[i];
1595 term.line[i] = term.line[i+n];
1596 term.line[i+n] = temp;
1597 }
1598
1599 selscroll(orig, -n);
1600 }
1601
1602 void
1603 selscroll(int orig, int n)
1604 {
1605 if (sel.ob.x == -1)
1606 return;
1607
1608 if (BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
1609 if ((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
1610 selclear(NULL);
1611 return;
1612 }
1613 if (sel.type == SEL_RECTANGULAR) {
1614 if (sel.ob.y < term.top)
1615 sel.ob.y = term.top;
1616 if (sel.oe.y > term.bot)
1617 sel.oe.y = term.bot;
1618 } else {
1619 if (sel.ob.y < term.top) {
1620 sel.ob.y = term.top;
1621 sel.ob.x = 0;
1622 }
1623 if (sel.oe.y > term.bot) {
1624 sel.oe.y = term.bot;
1625 sel.oe.x = term.col;
1626 }
1627 }
1628 selnormalize();
1629 }
1630 }
1631
1632 void
1633 tnewline(int first_col)
1634 {
1635 int y = term.c.y;
1636
1637 if (y == term.bot) {
1638 tscrollup(term.top, 1);
1639 } else {
1640 y++;
1641 }
1642 tmoveto(first_col ? 0 : term.c.x, y);
1643 }
1644
1645 void
1646 csiparse(void)
1647 {
1648 char *p = csiescseq.buf, *np;
1649 long int v;
1650
1651 csiescseq.narg = 0;
1652 if (*p == '?') {
1653 csiescseq.priv = 1;
1654 p++;
1655 }
1656
1657 csiescseq.buf[csiescseq.len] = '\0';
1658 while (p < csiescseq.buf+csiescseq.len) {
1659 np = NULL;
1660 v = strtol(p, &np, 10);
1661 if (np == p)
1662 v = 0;
1663 if (v == LONG_MAX || v == LONG_MIN)
1664 v = -1;
1665 csiescseq.arg[csiescseq.narg++] = v;
1666 p = np;
1667 if (*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1668 break;
1669 p++;
1670 }
1671 csiescseq.mode[0] = *p++;
1672 csiescseq.mode[1] = (p < csiescseq.buf+csiescseq.len) ? *p : '\0';
1673 }
1674
1675 /* for absolute user moves, when decom is set */
1676 void
1677 tmoveato(int x, int y)
1678 {
1679 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1680 }
1681
1682 void
1683 tmoveto(int x, int y)
1684 {
1685 int miny, maxy;
1686
1687 if (term.c.state & CURSOR_ORIGIN) {
1688 miny = term.top;
1689 maxy = term.bot;
1690 } else {
1691 miny = 0;
1692 maxy = term.row - 1;
1693 }
1694 term.c.state &= ~CURSOR_WRAPNEXT;
1695 term.c.x = LIMIT(x, 0, term.col-1);
1696 term.c.y = LIMIT(y, miny, maxy);
1697 }
1698
1699 void
1700 tsetchar(Rune u, Glyph *attr, int x, int y)
1701 {
1702 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1703 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1704 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1705 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1706 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1707 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1708 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1709 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1710 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1711 };
1712
1713 /*
1714 * The table is proudly stolen from rxvt.
1715 */
1716 if (term.trantbl[term.charset] == CS_GRAPHIC0 &&
1717 BETWEEN(u, 0x41, 0x7e) && vt100_0[u - 0x41])
1718 utf8decode(vt100_0[u - 0x41], &u, UTF_SIZ);
1719
1720 if (term.line[y][x].mode & ATTR_WIDE) {
1721 if (x+1 < term.col) {
1722 term.line[y][x+1].u = ' ';
1723 term.line[y][x+1].mode &= ~ATTR_WDUMMY;
1724 }
1725 } else if (term.line[y][x].mode & ATTR_WDUMMY) {
1726 term.line[y][x-1].u = ' ';
1727 term.line[y][x-1].mode &= ~ATTR_WIDE;
1728 }
1729
1730 term.dirty[y] = 1;
1731 term.line[y][x] = *attr;
1732 term.line[y][x].u = u;
1733 }
1734
1735 void
1736 tclearregion(int x1, int y1, int x2, int y2)
1737 {
1738 int x, y, temp;
1739 Glyph *gp;
1740
1741 if (x1 > x2)
1742 temp = x1, x1 = x2, x2 = temp;
1743 if (y1 > y2)
1744 temp = y1, y1 = y2, y2 = temp;
1745
1746 LIMIT(x1, 0, term.col-1);
1747 LIMIT(x2, 0, term.col-1);
1748 LIMIT(y1, 0, term.row-1);
1749 LIMIT(y2, 0, term.row-1);
1750
1751 for (y = y1; y <= y2; y++) {
1752 term.dirty[y] = 1;
1753 for (x = x1; x <= x2; x++) {
1754 gp = &term.line[y][x];
1755 if (selected(x, y))
1756 selclear(NULL);
1757 gp->fg = term.c.attr.fg;
1758 gp->bg = term.c.attr.bg;
1759 gp->mode = 0;
1760 gp->u = ' ';
1761 }
1762 }
1763 }
1764
1765 void
1766 tdeletechar(int n)
1767 {
1768 int dst, src, size;
1769 Glyph *line;
1770
1771 LIMIT(n, 0, term.col - term.c.x);
1772
1773 dst = term.c.x;
1774 src = term.c.x + n;
1775 size = term.col - src;
1776 line = term.line[term.c.y];
1777
1778 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1779 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1780 }
1781
1782 void
1783 tinsertblank(int n)
1784 {
1785 int dst, src, size;
1786 Glyph *line;
1787
1788 LIMIT(n, 0, term.col - term.c.x);
1789
1790 dst = term.c.x + n;
1791 src = term.c.x;
1792 size = term.col - dst;
1793 line = term.line[term.c.y];
1794
1795 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1796 tclearregion(src, term.c.y, dst - 1, term.c.y);
1797 }
1798
1799 void
1800 tinsertblankline(int n)
1801 {
1802 if (BETWEEN(term.c.y, term.top, term.bot))
1803 tscrolldown(term.c.y, n);
1804 }
1805
1806 void
1807 tdeleteline(int n)
1808 {
1809 if (BETWEEN(term.c.y, term.top, term.bot))
1810 tscrollup(term.c.y, n);
1811 }
1812
1813 int32_t
1814 tdefcolor(int *attr, int *npar, int l)
1815 {
1816 int32_t idx = -1;
1817 uint r, g, b;
1818
1819 switch (attr[*npar + 1]) {
1820 case 2: /* direct color in RGB space */
1821 if (*npar + 4 >= l) {
1822 fprintf(stderr,
1823 "erresc(38): Incorrect number of parameters (%d)\n",
1824 *npar);
1825 break;
1826 }
1827 r = attr[*npar + 2];
1828 g = attr[*npar + 3];
1829 b = attr[*npar + 4];
1830 *npar += 4;
1831 if (!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
1832 fprintf(stderr, "erresc: bad rgb color (%u,%u,%u)\n",
1833 r, g, b);
1834 else
1835 idx = TRUECOLOR(r, g, b);
1836 break;
1837 case 5: /* indexed color */
1838 if (*npar + 2 >= l) {
1839 fprintf(stderr,
1840 "erresc(38): Incorrect number of parameters (%d)\n",
1841 *npar);
1842 break;
1843 }
1844 *npar += 2;
1845 if (!BETWEEN(attr[*npar], 0, 255))
1846 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
1847 else
1848 idx = attr[*npar];
1849 break;
1850 case 0: /* implemented defined (only foreground) */
1851 case 1: /* transparent */
1852 case 3: /* direct color in CMY space */
1853 case 4: /* direct color in CMYK space */
1854 default:
1855 fprintf(stderr,
1856 "erresc(38): gfx attr %d unknown\n", attr[*npar]);
1857 break;
1858 }
1859
1860 return idx;
1861 }
1862
1863 void
1864 tsetattr(int *attr, int l)
1865 {
1866 int i;
1867 int32_t idx;
1868
1869 for (i = 0; i < l; i++) {
1870 switch (attr[i]) {
1871 case 0:
1872 term.c.attr.mode &= ~(
1873 ATTR_BOLD |
1874 ATTR_FAINT |
1875 ATTR_ITALIC |
1876 ATTR_UNDERLINE |
1877 ATTR_BLINK |
1878 ATTR_REVERSE |
1879 ATTR_INVISIBLE |
1880 ATTR_STRUCK );
1881 term.c.attr.fg = defaultfg;
1882 term.c.attr.bg = defaultbg;
1883 break;
1884 case 1:
1885 term.c.attr.mode |= ATTR_BOLD;
1886 break;
1887 case 2:
1888 term.c.attr.mode |= ATTR_FAINT;
1889 break;
1890 case 3:
1891 term.c.attr.mode |= ATTR_ITALIC;
1892 break;
1893 case 4:
1894 term.c.attr.mode |= ATTR_UNDERLINE;
1895 break;
1896 case 5: /* slow blink */
1897 /* FALLTHROUGH */
1898 case 6: /* rapid blink */
1899 term.c.attr.mode |= ATTR_BLINK;
1900 break;
1901 case 7:
1902 term.c.attr.mode |= ATTR_REVERSE;
1903 break;
1904 case 8:
1905 term.c.attr.mode |= ATTR_INVISIBLE;
1906 break;
1907 case 9:
1908 term.c.attr.mode |= ATTR_STRUCK;
1909 break;
1910 case 22:
1911 term.c.attr.mode &= ~(ATTR_BOLD | ATTR_FAINT);
1912 break;
1913 case 23:
1914 term.c.attr.mode &= ~ATTR_ITALIC;
1915 break;
1916 case 24:
1917 term.c.attr.mode &= ~ATTR_UNDERLINE;
1918 break;
1919 case 25:
1920 term.c.attr.mode &= ~ATTR_BLINK;
1921 break;
1922 case 27:
1923 term.c.attr.mode &= ~ATTR_REVERSE;
1924 break;
1925 case 28:
1926 term.c.attr.mode &= ~ATTR_INVISIBLE;
1927 break;
1928 case 29:
1929 term.c.attr.mode &= ~ATTR_STRUCK;
1930 break;
1931 case 38:
1932 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1933 term.c.attr.fg = idx;
1934 break;
1935 case 39:
1936 term.c.attr.fg = defaultfg;
1937 break;
1938 case 48:
1939 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1940 term.c.attr.bg = idx;
1941 break;
1942 case 49:
1943 term.c.attr.bg = defaultbg;
1944 break;
1945 default:
1946 if (BETWEEN(attr[i], 30, 37)) {
1947 term.c.attr.fg = attr[i] - 30;
1948 } else if (BETWEEN(attr[i], 40, 47)) {
1949 term.c.attr.bg = attr[i] - 40;
1950 } else if (BETWEEN(attr[i], 90, 97)) {
1951 term.c.attr.fg = attr[i] - 90 + 8;
1952 } else if (BETWEEN(attr[i], 100, 107)) {
1953 term.c.attr.bg = attr[i] - 100 + 8;
1954 } else {
1955 fprintf(stderr,
1956 "erresc(default): gfx attr %d unknown\n",
1957 attr[i]), csidump();
1958 }
1959 break;
1960 }
1961 }
1962 }
1963
1964 void
1965 tsetscroll(int t, int b)
1966 {
1967 int temp;
1968
1969 LIMIT(t, 0, term.row-1);
1970 LIMIT(b, 0, term.row-1);
1971 if (t > b) {
1972 temp = t;
1973 t = b;
1974 b = temp;
1975 }
1976 term.top = t;
1977 term.bot = b;
1978 }
1979
1980 void
1981 tsetmode(int priv, int set, int *args, int narg)
1982 {
1983 int *lim, mode;
1984 int alt;
1985
1986 for (lim = args + narg; args < lim; ++args) {
1987 if (priv) {
1988 switch (*args) {
1989 case 1: /* DECCKM -- Cursor key */
1990 MODBIT(term.mode, set, MODE_APPCURSOR);
1991 break;
1992 case 5: /* DECSCNM -- Reverse video */
1993 mode = term.mode;
1994 MODBIT(term.mode, set, MODE_REVERSE);
1995 if (mode != term.mode)
1996 redraw();
1997 break;
1998 case 6: /* DECOM -- Origin */
1999 MODBIT(term.c.state, set, CURSOR_ORIGIN);
2000 tmoveato(0, 0);
2001 break;
2002 case 7: /* DECAWM -- Auto wrap */
2003 MODBIT(term.mode, set, MODE_WRAP);
2004 break;
2005 case 0: /* Error (IGNORED) */
2006 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
2007 case 3: /* DECCOLM -- Column (IGNORED) */
2008 case 4: /* DECSCLM -- Scroll (IGNORED) */
2009 case 8: /* DECARM -- Auto repeat (IGNORED) */
2010 case 18: /* DECPFF -- Printer feed (IGNORED) */
2011 case 19: /* DECPEX -- Printer extent (IGNORED) */
2012 case 42: /* DECNRCM -- National characters (IGNORED) */
2013 case 12: /* att610 -- Start blinking cursor (IGNORED) */
2014 break;
2015 case 25: /* DECTCEM -- Text Cursor Enable Mode */
2016 MODBIT(term.mode, !set, MODE_HIDE);
2017 break;
2018 case 9: /* X10 mouse compatibility mode */
2019 xsetpointermotion(0);
2020 MODBIT(term.mode, 0, MODE_MOUSE);
2021 MODBIT(term.mode, set, MODE_MOUSEX10);
2022 break;
2023 case 1000: /* 1000: report button press */
2024 xsetpointermotion(0);
2025 MODBIT(term.mode, 0, MODE_MOUSE);
2026 MODBIT(term.mode, set, MODE_MOUSEBTN);
2027 break;
2028 case 1002: /* 1002: report motion on button press */
2029 xsetpointermotion(0);
2030 MODBIT(term.mode, 0, MODE_MOUSE);
2031 MODBIT(term.mode, set, MODE_MOUSEMOTION);
2032 break;
2033 case 1003: /* 1003: enable all mouse motions */
2034 xsetpointermotion(set);
2035 MODBIT(term.mode, 0, MODE_MOUSE);
2036 MODBIT(term.mode, set, MODE_MOUSEMANY);
2037 break;
2038 case 1004: /* 1004: send focus events to tty */
2039 MODBIT(term.mode, set, MODE_FOCUS);
2040 break;
2041 case 1006: /* 1006: extended reporting mode */
2042 MODBIT(term.mode, set, MODE_MOUSESGR);
2043 break;
2044 case 1034:
2045 MODBIT(term.mode, set, MODE_8BIT);
2046 break;
2047 case 1049: /* swap screen & set/restore cursor as xterm */
2048 if (!allowaltscreen)
2049 break;
2050 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
2051 /* FALLTHROUGH */
2052 case 47: /* swap screen */
2053 case 1047:
2054 if (!allowaltscreen)
2055 break;
2056 alt = IS_SET(MODE_ALTSCREEN);
2057 if (alt) {
2058 tclearregion(0, 0, term.col-1,
2059 term.row-1);
2060 }
2061 if (set ^ alt) /* set is always 1 or 0 */
2062 tswapscreen();
2063 if (*args != 1049)
2064 break;
2065 /* FALLTHROUGH */
2066 case 1048:
2067 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
2068 break;
2069 case 2004: /* 2004: bracketed paste mode */
2070 MODBIT(term.mode, set, MODE_BRCKTPASTE);
2071 break;
2072 /* Not implemented mouse modes. See comments there. */
2073 case 1001: /* mouse highlight mode; can hang the
2074 terminal by design when implemented. */
2075 case 1005: /* UTF-8 mouse mode; will confuse
2076 applications not supporting UTF-8
2077 and luit. */
2078 case 1015: /* urxvt mangled mouse mode; incompatible
2079 and can be mistaken for other control
2080 codes. */
2081 default:
2082 fprintf(stderr,
2083 "erresc: unknown private set/reset mode %d\n",
2084 *args);
2085 break;
2086 }
2087 } else {
2088 switch (*args) {
2089 case 0: /* Error (IGNORED) */
2090 break;
2091 case 2: /* KAM -- keyboard action */
2092 MODBIT(term.mode, set, MODE_KBDLOCK);
2093 break;
2094 case 4: /* IRM -- Insertion-replacement */
2095 MODBIT(term.mode, set, MODE_INSERT);
2096 break;
2097 case 12: /* SRM -- Send/Receive */
2098 MODBIT(term.mode, !set, MODE_ECHO);
2099 break;
2100 case 20: /* LNM -- Linefeed/new line */
2101 MODBIT(term.mode, set, MODE_CRLF);
2102 break;
2103 default:
2104 fprintf(stderr,
2105 "erresc: unknown set/reset mode %d\n",
2106 *args);
2107 break;
2108 }
2109 }
2110 }
2111 }
2112
2113 void
2114 csihandle(void)
2115 {
2116 char buf[40];
2117 int len;
2118
2119 switch (csiescseq.mode[0]) {
2120 default:
2121 unknown:
2122 fprintf(stderr, "erresc: unknown csi ");
2123 csidump();
2124 /* die(""); */
2125 break;
2126 case '@': /* ICH -- Insert <n> blank char */
2127 DEFAULT(csiescseq.arg[0], 1);
2128 tinsertblank(csiescseq.arg[0]);
2129 break;
2130 case 'A': /* CUU -- Cursor <n> Up */
2131 DEFAULT(csiescseq.arg[0], 1);
2132 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
2133 break;
2134 case 'B': /* CUD -- Cursor <n> Down */
2135 case 'e': /* VPR --Cursor <n> Down */
2136 DEFAULT(csiescseq.arg[0], 1);
2137 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
2138 break;
2139 case 'i': /* MC -- Media Copy */
2140 switch (csiescseq.arg[0]) {
2141 case 0:
2142 tdump();
2143 break;
2144 case 1:
2145 tdumpline(term.c.y);
2146 break;
2147 case 2:
2148 tdumpsel();
2149 break;
2150 case 4:
2151 term.mode &= ~MODE_PRINT;
2152 break;
2153 case 5:
2154 term.mode |= MODE_PRINT;
2155 break;
2156 }
2157 break;
2158 case 'c': /* DA -- Device Attributes */
2159 if (csiescseq.arg[0] == 0)
2160 ttywrite(vtiden, sizeof(vtiden) - 1);
2161 break;
2162 case 'C': /* CUF -- Cursor <n> Forward */
2163 case 'a': /* HPR -- Cursor <n> Forward */
2164 DEFAULT(csiescseq.arg[0], 1);
2165 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
2166 break;
2167 case 'D': /* CUB -- Cursor <n> Backward */
2168 DEFAULT(csiescseq.arg[0], 1);
2169 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
2170 break;
2171 case 'E': /* CNL -- Cursor <n> Down and first col */
2172 DEFAULT(csiescseq.arg[0], 1);
2173 tmoveto(0, term.c.y+csiescseq.arg[0]);
2174 break;
2175 case 'F': /* CPL -- Cursor <n> Up and first col */
2176 DEFAULT(csiescseq.arg[0], 1);
2177 tmoveto(0, term.c.y-csiescseq.arg[0]);
2178 break;
2179 case 'g': /* TBC -- Tabulation clear */
2180 switch (csiescseq.arg[0]) {
2181 case 0: /* clear current tab stop */
2182 term.tabs[term.c.x] = 0;
2183 break;
2184 case 3: /* clear all the tabs */
2185 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
2186 break;
2187 default:
2188 goto unknown;
2189 }
2190 break;
2191 case 'G': /* CHA -- Move to <col> */
2192 case '`': /* HPA */
2193 DEFAULT(csiescseq.arg[0], 1);
2194 tmoveto(csiescseq.arg[0]-1, term.c.y);
2195 break;
2196 case 'H': /* CUP -- Move to <row> <col> */
2197 case 'f': /* HVP */
2198 DEFAULT(csiescseq.arg[0], 1);
2199 DEFAULT(csiescseq.arg[1], 1);
2200 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
2201 break;
2202 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
2203 DEFAULT(csiescseq.arg[0], 1);
2204 tputtab(csiescseq.arg[0]);
2205 break;
2206 case 'J': /* ED -- Clear screen */
2207 selclear(NULL);
2208 switch (csiescseq.arg[0]) {
2209 case 0: /* below */
2210 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
2211 if (term.c.y < term.row-1) {
2212 tclearregion(0, term.c.y+1, term.col-1,
2213 term.row-1);
2214 }
2215 break;
2216 case 1: /* above */
2217 if (term.c.y > 1)
2218 tclearregion(0, 0, term.col-1, term.c.y-1);
2219 tclearregion(0, term.c.y, term.c.x, term.c.y);
2220 break;
2221 case 2: /* all */
2222 tclearregion(0, 0, term.col-1, term.row-1);
2223 break;
2224 default:
2225 goto unknown;
2226 }
2227 break;
2228 case 'K': /* EL -- Clear line */
2229 switch (csiescseq.arg[0]) {
2230 case 0: /* right */
2231 tclearregion(term.c.x, term.c.y, term.col-1,
2232 term.c.y);
2233 break;
2234 case 1: /* left */
2235 tclearregion(0, term.c.y, term.c.x, term.c.y);
2236 break;
2237 case 2: /* all */
2238 tclearregion(0, term.c.y, term.col-1, term.c.y);
2239 break;
2240 }
2241 break;
2242 case 'S': /* SU -- Scroll <n> line up */
2243 DEFAULT(csiescseq.arg[0], 1);
2244 tscrollup(term.top, csiescseq.arg[0]);
2245 break;
2246 case 'T': /* SD -- Scroll <n> line down */
2247 DEFAULT(csiescseq.arg[0], 1);
2248 tscrolldown(term.top, csiescseq.arg[0]);
2249 break;
2250 case 'L': /* IL -- Insert <n> blank lines */
2251 DEFAULT(csiescseq.arg[0], 1);
2252 tinsertblankline(csiescseq.arg[0]);
2253 break;
2254 case 'l': /* RM -- Reset Mode */
2255 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
2256 break;
2257 case 'M': /* DL -- Delete <n> lines */
2258 DEFAULT(csiescseq.arg[0], 1);
2259 tdeleteline(csiescseq.arg[0]);
2260 break;
2261 case 'X': /* ECH -- Erase <n> char */
2262 DEFAULT(csiescseq.arg[0], 1);
2263 tclearregion(term.c.x, term.c.y,
2264 term.c.x + csiescseq.arg[0] - 1, term.c.y);
2265 break;
2266 case 'P': /* DCH -- Delete <n> char */
2267 DEFAULT(csiescseq.arg[0], 1);
2268 tdeletechar(csiescseq.arg[0]);
2269 break;
2270 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
2271 DEFAULT(csiescseq.arg[0], 1);
2272 tputtab(-csiescseq.arg[0]);
2273 break;
2274 case 'd': /* VPA -- Move to <row> */
2275 DEFAULT(csiescseq.arg[0], 1);
2276 tmoveato(term.c.x, csiescseq.arg[0]-1);
2277 break;
2278 case 'h': /* SM -- Set terminal mode */
2279 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
2280 break;
2281 case 'm': /* SGR -- Terminal attribute (color) */
2282 tsetattr(csiescseq.arg, csiescseq.narg);
2283 break;
2284 case 'n': /* DSR – Device Status Report (cursor position) */
2285 if (csiescseq.arg[0] == 6) {
2286 len = snprintf(buf, sizeof(buf),"\033[%i;%iR",
2287 term.c.y+1, term.c.x+1);
2288 ttywrite(buf, len);
2289 }
2290 break;
2291 case 'r': /* DECSTBM -- Set Scrolling Region */
2292 if (csiescseq.priv) {
2293 goto unknown;
2294 } else {
2295 DEFAULT(csiescseq.arg[0], 1);
2296 DEFAULT(csiescseq.arg[1], term.row);
2297 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
2298 tmoveato(0, 0);
2299 }
2300 break;
2301 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
2302 tcursor(CURSOR_SAVE);
2303 break;
2304 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
2305 tcursor(CURSOR_LOAD);
2306 break;
2307 case ' ':
2308 switch (csiescseq.mode[1]) {
2309 case 'q': /* DECSCUSR -- Set Cursor Style */
2310 DEFAULT(csiescseq.arg[0], 1);
2311 if (!BETWEEN(csiescseq.arg[0], 0, 6)) {
2312 goto unknown;
2313 }
2314 xw.cursor = csiescseq.arg[0];
2315 break;
2316 default:
2317 goto unknown;
2318 }
2319 break;
2320 }
2321 }
2322
2323 void
2324 csidump(void)
2325 {
2326 int i;
2327 uint c;
2328
2329 printf("ESC[");
2330 for (i = 0; i < csiescseq.len; i++) {
2331 c = csiescseq.buf[i] & 0xff;
2332 if (isprint(c)) {
2333 putchar(c);
2334 } else if (c == '\n') {
2335 printf("(\\n)");
2336 } else if (c == '\r') {
2337 printf("(\\r)");
2338 } else if (c == 0x1b) {
2339 printf("(\\e)");
2340 } else {
2341 printf("(%02x)", c);
2342 }
2343 }
2344 putchar('\n');
2345 }
2346
2347 void
2348 csireset(void)
2349 {
2350 memset(&csiescseq, 0, sizeof(csiescseq));
2351 }
2352
2353 void
2354 strhandle(void)
2355 {
2356 char *p = NULL;
2357 int j, narg, par;
2358
2359 term.esc &= ~(ESC_STR_END|ESC_STR);
2360 strparse();
2361 par = (narg = strescseq.narg) ? atoi(strescseq.args[0]) : 0;
2362
2363 switch (strescseq.type) {
2364 case ']': /* OSC -- Operating System Command */
2365 switch (par) {
2366 case 0:
2367 case 1:
2368 case 2:
2369 if (narg > 1)
2370 xsettitle(strescseq.args[1]);
2371 return;
2372 case 4: /* color set */
2373 if (narg < 3)
2374 break;
2375 p = strescseq.args[2];
2376 /* FALLTHROUGH */
2377 case 104: /* color reset, here p = NULL */
2378 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2379 if (xsetcolorname(j, p)) {
2380 fprintf(stderr, "erresc: invalid color %s\n", p);
2381 } else {
2382 /*
2383 * TODO if defaultbg color is changed, borders
2384 * are dirty
2385 */
2386 redraw();
2387 }
2388 return;
2389 }
2390 break;
2391 case 'k': /* old title set compatibility */
2392 xsettitle(strescseq.args[0]);
2393 return;
2394 case 'P': /* DCS -- Device Control String */
2395 case '_': /* APC -- Application Program Command */
2396 case '^': /* PM -- Privacy Message */
2397 return;
2398 }
2399
2400 fprintf(stderr, "erresc: unknown str ");
2401 strdump();
2402 }
2403
2404 void
2405 strparse(void)
2406 {
2407 int c;
2408 char *p = strescseq.buf;
2409
2410 strescseq.narg = 0;
2411 strescseq.buf[strescseq.len] = '\0';
2412
2413 if (*p == '\0')
2414 return;
2415
2416 while (strescseq.narg < STR_ARG_SIZ) {
2417 strescseq.args[strescseq.narg++] = p;
2418 while ((c = *p) != ';' && c != '\0')
2419 ++p;
2420 if (c == '\0')
2421 return;
2422 *p++ = '\0';
2423 }
2424 }
2425
2426 void
2427 strdump(void)
2428 {
2429 int i;
2430 uint c;
2431
2432 printf("ESC%c", strescseq.type);
2433 for (i = 0; i < strescseq.len; i++) {
2434 c = strescseq.buf[i] & 0xff;
2435 if (c == '\0') {
2436 return;
2437 } else if (isprint(c)) {
2438 putchar(c);
2439 } else if (c == '\n') {
2440 printf("(\\n)");
2441 } else if (c == '\r') {
2442 printf("(\\r)");
2443 } else if (c == 0x1b) {
2444 printf("(\\e)");
2445 } else {
2446 printf("(%02x)", c);
2447 }
2448 }
2449 printf("ESC\\\n");
2450 }
2451
2452 void
2453 strreset(void)
2454 {
2455 memset(&strescseq, 0, sizeof(strescseq));
2456 }
2457
2458 void
2459 tprinter(char *s, size_t len)
2460 {
2461 if (iofd != -1 && xwrite(iofd, s, len) < 0) {
2462 fprintf(stderr, "Error writing in %s:%s\n",
2463 opt_io, strerror(errno));
2464 close(iofd);
2465 iofd = -1;
2466 }
2467 }
2468
2469 void
2470 toggleprinter(const Arg *arg)
2471 {
2472 term.mode ^= MODE_PRINT;
2473 }
2474
2475 void
2476 printscreen(const Arg *arg)
2477 {
2478 tdump();
2479 }
2480
2481 void
2482 printsel(const Arg *arg)
2483 {
2484 tdumpsel();
2485 }
2486
2487 void
2488 tdumpsel(void)
2489 {
2490 char *ptr;
2491
2492 if ((ptr = getsel())) {
2493 tprinter(ptr, strlen(ptr));
2494 free(ptr);
2495 }
2496 }
2497
2498 void
2499 tdumpline(int n)
2500 {
2501 char buf[UTF_SIZ];
2502 Glyph *bp, *end;
2503
2504 bp = &term.line[n][0];
2505 end = &bp[MIN(tlinelen(n), term.col) - 1];
2506 if (bp != end || bp->u != ' ') {
2507 for ( ;bp <= end; ++bp)
2508 tprinter(buf, utf8encode(bp->u, buf));
2509 }
2510 tprinter("\n", 1);
2511 }
2512
2513 void
2514 tdump(void)
2515 {
2516 int i;
2517
2518 for (i = 0; i < term.row; ++i)
2519 tdumpline(i);
2520 }
2521
2522 void
2523 tputtab(int n)
2524 {
2525 uint x = term.c.x;
2526
2527 if (n > 0) {
2528 while (x < term.col && n--)
2529 for (++x; x < term.col && !term.tabs[x]; ++x)
2530 /* nothing */ ;
2531 } else if (n < 0) {
2532 while (x > 0 && n++)
2533 for (--x; x > 0 && !term.tabs[x]; --x)
2534 /* nothing */ ;
2535 }
2536 term.c.x = LIMIT(x, 0, term.col-1);
2537 }
2538
2539 void
2540 techo(Rune u)
2541 {
2542 if (ISCONTROL(u)) { /* control code */
2543 if (u & 0x80) {
2544 u &= 0x7f;
2545 tputc('^');
2546 tputc('[');
2547 } else if (u != '\n' && u != '\r' && u != '\t') {
2548 u ^= 0x40;
2549 tputc('^');
2550 }
2551 }
2552 tputc(u);
2553 }
2554
2555 void
2556 tdeftran(char ascii)
2557 {
2558 static char cs[] = "0B";
2559 static int vcs[] = {CS_GRAPHIC0, CS_USA};
2560 char *p;
2561
2562 if ((p = strchr(cs, ascii)) == NULL) {
2563 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2564 } else {
2565 term.trantbl[term.icharset] = vcs[p - cs];
2566 }
2567 }
2568
2569 void
2570 tdectest(char c)
2571 {
2572 int x, y;
2573
2574 if (c == '8') { /* DEC screen alignment test. */
2575 for (x = 0; x < term.col; ++x) {
2576 for (y = 0; y < term.row; ++y)
2577 tsetchar('E', &term.c.attr, x, y);
2578 }
2579 }
2580 }
2581
2582 void
2583 tstrsequence(uchar c)
2584 {
2585 switch (c) {
2586 case 0x90: /* DCS -- Device Control String */
2587 c = 'P';
2588 break;
2589 case 0x9f: /* APC -- Application Program Command */
2590 c = '_';
2591 break;
2592 case 0x9e: /* PM -- Privacy Message */
2593 c = '^';
2594 break;
2595 case 0x9d: /* OSC -- Operating System Command */
2596 c = ']';
2597 break;
2598 }
2599 strreset();
2600 strescseq.type = c;
2601 term.esc |= ESC_STR;
2602 }
2603
2604 void
2605 tcontrolcode(uchar ascii)
2606 {
2607 switch (ascii) {
2608 case '\t': /* HT */
2609 tputtab(1);
2610 return;
2611 case '\b': /* BS */
2612 tmoveto(term.c.x-1, term.c.y);
2613 return;
2614 case '\r': /* CR */
2615 tmoveto(0, term.c.y);
2616 return;
2617 case '\f': /* LF */
2618 case '\v': /* VT */
2619 case '\n': /* LF */
2620 /* go to first col if the mode is set */
2621 tnewline(IS_SET(MODE_CRLF));
2622 return;
2623 case '\a': /* BEL */
2624 if (term.esc & ESC_STR_END) {
2625 /* backwards compatibility to xterm */
2626 strhandle();
2627 } else {
2628 if (!(xw.state & WIN_FOCUSED))
2629 xseturgency(1);
2630 if (bellvolume)
2631 XkbBell(xw.dpy, xw.win, bellvolume, (Atom)NULL);
2632 }
2633 break;
2634 case '\033': /* ESC */
2635 csireset();
2636 term.esc &= ~(ESC_CSI|ESC_ALTCHARSET|ESC_TEST);
2637 term.esc |= ESC_START;
2638 return;
2639 case '\016': /* SO (LS1 -- Locking shift 1) */
2640 case '\017': /* SI (LS0 -- Locking shift 0) */
2641 term.charset = 1 - (ascii - '\016');
2642 return;
2643 case '\032': /* SUB */
2644 tsetchar('?', &term.c.attr, term.c.x, term.c.y);
2645 case '\030': /* CAN */
2646 csireset();
2647 break;
2648 case '\005': /* ENQ (IGNORED) */
2649 case '\000': /* NUL (IGNORED) */
2650 case '\021': /* XON (IGNORED) */
2651 case '\023': /* XOFF (IGNORED) */
2652 case 0177: /* DEL (IGNORED) */
2653 return;
2654 case 0x84: /* TODO: IND */
2655 break;
2656 case 0x85: /* NEL -- Next line */
2657 tnewline(1); /* always go to first col */
2658 break;
2659 case 0x88: /* HTS -- Horizontal tab stop */
2660 term.tabs[term.c.x] = 1;
2661 break;
2662 case 0x8d: /* TODO: RI */
2663 case 0x8e: /* TODO: SS2 */
2664 case 0x8f: /* TODO: SS3 */
2665 case 0x98: /* TODO: SOS */
2666 break;
2667 case 0x9a: /* DECID -- Identify Terminal */
2668 ttywrite(vtiden, sizeof(vtiden) - 1);
2669 break;
2670 case 0x9b: /* TODO: CSI */
2671 case 0x9c: /* TODO: ST */
2672 break;
2673 case 0x90: /* DCS -- Device Control String */
2674 case 0x9f: /* APC -- Application Program Command */
2675 case 0x9e: /* PM -- Privacy Message */
2676 case 0x9d: /* OSC -- Operating System Command */
2677 tstrsequence(ascii);
2678 return;
2679 }
2680 /* only CAN, SUB, \a and C1 chars interrupt a sequence */
2681 term.esc &= ~(ESC_STR_END|ESC_STR);
2682 }
2683
2684 /*
2685 * returns 1 when the sequence is finished and it hasn't to read
2686 * more characters for this sequence, otherwise 0
2687 */
2688 int
2689 eschandle(uchar ascii)
2690 {
2691 switch (ascii) {
2692 case '[':
2693 term.esc |= ESC_CSI;
2694 return 0;
2695 case '#':
2696 term.esc |= ESC_TEST;
2697 return 0;
2698 case 'P': /* DCS -- Device Control String */
2699 case '_': /* APC -- Application Program Command */
2700 case '^': /* PM -- Privacy Message */
2701 case ']': /* OSC -- Operating System Command */
2702 case 'k': /* old title set compatibility */
2703 tstrsequence(ascii);
2704 return 0;
2705 case 'n': /* LS2 -- Locking shift 2 */
2706 case 'o': /* LS3 -- Locking shift 3 */
2707 term.charset = 2 + (ascii - 'n');
2708 break;
2709 case '(': /* GZD4 -- set primary charset G0 */
2710 case ')': /* G1D4 -- set secondary charset G1 */
2711 case '*': /* G2D4 -- set tertiary charset G2 */
2712 case '+': /* G3D4 -- set quaternary charset G3 */
2713 term.icharset = ascii - '(';
2714 term.esc |= ESC_ALTCHARSET;
2715 return 0;
2716 case 'D': /* IND -- Linefeed */
2717 if (term.c.y == term.bot) {
2718 tscrollup(term.top, 1);
2719 } else {
2720 tmoveto(term.c.x, term.c.y+1);
2721 }
2722 break;
2723 case 'E': /* NEL -- Next line */
2724 tnewline(1); /* always go to first col */
2725 break;
2726 case 'H': /* HTS -- Horizontal tab stop */
2727 term.tabs[term.c.x] = 1;
2728 break;
2729 case 'M': /* RI -- Reverse index */
2730 if (term.c.y == term.top) {
2731 tscrolldown(term.top, 1);
2732 } else {
2733 tmoveto(term.c.x, term.c.y-1);
2734 }
2735 break;
2736 case 'Z': /* DECID -- Identify Terminal */
2737 ttywrite(vtiden, sizeof(vtiden) - 1);
2738 break;
2739 case 'c': /* RIS -- Reset to inital state */
2740 treset();
2741 xresettitle();
2742 xloadcols();
2743 break;
2744 case '=': /* DECPAM -- Application keypad */
2745 term.mode |= MODE_APPKEYPAD;
2746 break;
2747 case '>': /* DECPNM -- Normal keypad */
2748 term.mode &= ~MODE_APPKEYPAD;
2749 break;
2750 case '7': /* DECSC -- Save Cursor */
2751 tcursor(CURSOR_SAVE);
2752 break;
2753 case '8': /* DECRC -- Restore Cursor */
2754 tcursor(CURSOR_LOAD);
2755 break;
2756 case '\\': /* ST -- String Terminator */
2757 if (term.esc & ESC_STR_END)
2758 strhandle();
2759 break;
2760 default:
2761 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2762 (uchar) ascii, isprint(ascii)? ascii:'.');
2763 break;
2764 }
2765 return 1;
2766 }
2767
2768 void
2769 tputc(Rune u)
2770 {
2771 char c[UTF_SIZ];
2772 int control;
2773 int width, len;
2774 Glyph *gp;
2775
2776 len = utf8encode(u, c);
2777 if ((width = wcwidth(u)) == -1) {
2778 memcpy(c, "\357\277\275", 4); /* UTF_INVALID */
2779 width = 1;
2780 }
2781
2782 if (IS_SET(MODE_PRINT))
2783 tprinter(c, len);
2784 control = ISCONTROL(u);
2785
2786 /*
2787 * STR sequence must be checked before anything else
2788 * because it uses all following characters until it
2789 * receives a ESC, a SUB, a ST or any other C1 control
2790 * character.
2791 */
2792 if (term.esc & ESC_STR) {
2793 if (u == '\a' || u == 030 || u == 032 || u == 033 ||
2794 ISCONTROLC1(u)) {
2795 term.esc &= ~(ESC_START|ESC_STR);
2796 term.esc |= ESC_STR_END;
2797 } else if (strescseq.len + len < sizeof(strescseq.buf) - 1) {
2798 memmove(&strescseq.buf[strescseq.len], c, len);
2799 strescseq.len += len;
2800 return;
2801 } else {
2802 /*
2803 * Here is a bug in terminals. If the user never sends
2804 * some code to stop the str or esc command, then st
2805 * will stop responding. But this is better than
2806 * silently failing with unknown characters. At least
2807 * then users will report back.
2808 *
2809 * In the case users ever get fixed, here is the code:
2810 */
2811 /*
2812 * term.esc = 0;
2813 * strhandle();
2814 */
2815 return;
2816 }
2817 }
2818
2819 /*
2820 * Actions of control codes must be performed as soon they arrive
2821 * because they can be embedded inside a control sequence, and
2822 * they must not cause conflicts with sequences.
2823 */
2824 if (control) {
2825 tcontrolcode(u);
2826 /*
2827 * control codes are not shown ever
2828 */
2829 return;
2830 } else if (term.esc & ESC_START) {
2831 if (term.esc & ESC_CSI) {
2832 csiescseq.buf[csiescseq.len++] = u;
2833 if (BETWEEN(u, 0x40, 0x7E)
2834 || csiescseq.len >= \
2835 sizeof(csiescseq.buf)-1) {
2836 term.esc = 0;
2837 csiparse();
2838 csihandle();
2839 }
2840 return;
2841 } else if (term.esc & ESC_ALTCHARSET) {
2842 tdeftran(u);
2843 } else if (term.esc & ESC_TEST) {
2844 tdectest(u);
2845 } else {
2846 if (!eschandle(u))
2847 return;
2848 /* sequence already finished */
2849 }
2850 term.esc = 0;
2851 /*
2852 * All characters which form part of a sequence are not
2853 * printed
2854 */
2855 return;
2856 }
2857 if (sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
2858 selclear(NULL);
2859
2860 gp = &term.line[term.c.y][term.c.x];
2861 if (IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2862 gp->mode |= ATTR_WRAP;
2863 tnewline(1);
2864 gp = &term.line[term.c.y][term.c.x];
2865 }
2866
2867 if (IS_SET(MODE_INSERT) && term.c.x+width < term.col)
2868 memmove(gp+width, gp, (term.col - term.c.x - width) * sizeof(Glyph));
2869
2870 if (term.c.x+width > term.col) {
2871 tnewline(1);
2872 gp = &term.line[term.c.y][term.c.x];
2873 }
2874
2875 tsetchar(u, &term.c.attr, term.c.x, term.c.y);
2876
2877 if (width == 2) {
2878 gp->mode |= ATTR_WIDE;
2879 if (term.c.x+1 < term.col) {
2880 gp[1].u = '\0';
2881 gp[1].mode = ATTR_WDUMMY;
2882 }
2883 }
2884 if (term.c.x+width < term.col) {
2885 tmoveto(term.c.x+width, term.c.y);
2886 } else {
2887 term.c.state |= CURSOR_WRAPNEXT;
2888 }
2889 }
2890
2891 void
2892 tresize(int col, int row)
2893 {
2894 int i;
2895 int minrow = MIN(row, term.row);
2896 int mincol = MIN(col, term.col);
2897 int *bp;
2898 TCursor c;
2899
2900 if (col < 1 || row < 1) {
2901 fprintf(stderr,
2902 "tresize: error resizing to %dx%d\n", col, row);
2903 return;
2904 }
2905
2906 /*
2907 * slide screen to keep cursor where we expect it -
2908 * tscrollup would work here, but we can optimize to
2909 * memmove because we're freeing the earlier lines
2910 */
2911 for (i = 0; i <= term.c.y - row; i++) {
2912 free(term.line[i]);
2913 free(term.alt[i]);
2914 }
2915 /* ensure that both src and dst are not NULL */
2916 if (i > 0) {
2917 memmove(term.line, term.line + i, row * sizeof(Line));
2918 memmove(term.alt, term.alt + i, row * sizeof(Line));
2919 }
2920 for (i += row; i < term.row; i++) {
2921 free(term.line[i]);
2922 free(term.alt[i]);
2923 }
2924
2925 /* resize to new width */
2926 term.specbuf = xrealloc(term.specbuf, col * sizeof(XftGlyphFontSpec));
2927
2928 /* resize to new height */
2929 term.line = xrealloc(term.line, row * sizeof(Line));
2930 term.alt = xrealloc(term.alt, row * sizeof(Line));
2931 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2932 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2933
2934 /* resize each row to new width, zero-pad if needed */
2935 for (i = 0; i < minrow; i++) {
2936 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2937 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2938 }
2939
2940 /* allocate any new rows */
2941 for (/* i == minrow */; i < row; i++) {
2942 term.line[i] = xmalloc(col * sizeof(Glyph));
2943 term.alt[i] = xmalloc(col * sizeof(Glyph));
2944 }
2945 if (col > term.col) {
2946 bp = term.tabs + term.col;
2947
2948 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2949 while (--bp > term.tabs && !*bp)
2950 /* nothing */ ;
2951 for (bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2952 *bp = 1;
2953 }
2954 /* update terminal size */
2955 term.col = col;
2956 term.row = row;
2957 /* reset scrolling region */
2958 tsetscroll(0, row-1);
2959 /* make use of the LIMIT in tmoveto */
2960 tmoveto(term.c.x, term.c.y);
2961 /* Clearing both screens (it makes dirty all lines) */
2962 c = term.c;
2963 for (i = 0; i < 2; i++) {
2964 if (mincol < col && 0 < minrow) {
2965 tclearregion(mincol, 0, col - 1, minrow - 1);
2966 }
2967 if (0 < col && minrow < row) {
2968 tclearregion(0, minrow, col - 1, row - 1);
2969 }
2970 tswapscreen();
2971 tcursor(CURSOR_LOAD);
2972 }
2973 term.c = c;
2974 }
2975
2976 void
2977 xresize(int col, int row)
2978 {
2979 xw.tw = MAX(1, col * xw.cw);
2980 xw.th = MAX(1, row * xw.ch);
2981
2982 XFreePixmap(xw.dpy, xw.buf);
2983 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2984 DefaultDepth(xw.dpy, xw.scr));
2985 XftDrawChange(xw.draw, xw.buf);
2986 xclear(0, 0, xw.w, xw.h);
2987 }
2988
2989 ushort
2990 sixd_to_16bit(int x)
2991 {
2992 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2993 }
2994
2995 int
2996 xloadcolor(int i, const char *name, Color *ncolor)
2997 {
2998 XRenderColor color = { .alpha = 0xffff };
2999
3000 if (!name) {
3001 if (BETWEEN(i, 16, 255)) { /* 256 color */
3002 if (i < 6*6*6+16) { /* same colors as xterm */
3003 color.red = sixd_to_16bit( ((i-16)/36)%6 );
3004 color.green = sixd_to_16bit( ((i-16)/6) %6 );
3005 color.blue = sixd_to_16bit( ((i-16)/1) %6 );
3006 } else { /* greyscale */
3007 color.red = 0x0808 + 0x0a0a * (i - (6*6*6+16));
3008 color.green = color.blue = color.red;
3009 }
3010 return XftColorAllocValue(xw.dpy, xw.vis,
3011 xw.cmap, &color, ncolor);
3012 } else
3013 name = colorname[i];
3014 }
3015 return XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, ncolor);
3016 }
3017
3018 void
3019 xloadcols(void)
3020 {
3021 int i;
3022 static int loaded;
3023 Color *cp;
3024
3025 if (loaded) {
3026 for (cp = dc.col; cp < &dc.col[LEN(dc.col)]; ++cp)
3027 XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
3028 }
3029
3030 for (i = 0; i < LEN(dc.col); i++)
3031 if (!xloadcolor(i, NULL, &dc.col[i])) {
3032 if (colorname[i])
3033 die("Could not allocate color '%s'\n", colorname[i]);
3034 else
3035 die("Could not allocate color %d\n", i);
3036 }
3037 loaded = 1;
3038 }
3039
3040 int
3041 xsetcolorname(int x, const char *name)
3042 {
3043 Color ncolor;
3044
3045 if (!BETWEEN(x, 0, LEN(dc.col)))
3046 return 1;
3047
3048
3049 if (!xloadcolor(x, name, &ncolor))
3050 return 1;
3051
3052 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
3053 dc.col[x] = ncolor;
3054 return 0;
3055 }
3056
3057 void
3058 xtermclear(int col1, int row1, int col2, int row2)
3059 {
3060 XftDrawRect(xw.draw,
3061 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
3062 borderpx + col1 * xw.cw,
3063 borderpx + row1 * xw.ch,
3064 (col2-col1+1) * xw.cw,
3065 (row2-row1+1) * xw.ch);
3066 }
3067
3068 /*
3069 * Absolute coordinates.
3070 */
3071 void
3072 xclear(int x1, int y1, int x2, int y2)
3073 {
3074 XftDrawRect(xw.draw,
3075 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
3076 x1, y1, x2-x1, y2-y1);
3077 }
3078
3079 void
3080 xhints(void)
3081 {
3082 XClassHint class = {opt_class ? opt_class : termname, termname};
3083 XWMHints wm = {.flags = InputHint, .input = 1};
3084 XSizeHints *sizeh = NULL;
3085
3086 sizeh = XAllocSizeHints();
3087
3088 sizeh->flags = PSize | PResizeInc | PBaseSize;
3089 sizeh->height = xw.h;
3090 sizeh->width = xw.w;
3091 sizeh->height_inc = xw.ch;
3092 sizeh->width_inc = xw.cw;
3093 sizeh->base_height = 2 * borderpx;
3094 sizeh->base_width = 2 * borderpx;
3095 if (xw.isfixed) {
3096 sizeh->flags |= PMaxSize | PMinSize;
3097 sizeh->min_width = sizeh->max_width = xw.w;
3098 sizeh->min_height = sizeh->max_height = xw.h;
3099 }
3100 if (xw.gm & (XValue|YValue)) {
3101 sizeh->flags |= USPosition | PWinGravity;
3102 sizeh->x = xw.l;
3103 sizeh->y = xw.t;
3104 sizeh->win_gravity = xgeommasktogravity(xw.gm);
3105 }
3106
3107 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
3108 &class);
3109 XFree(sizeh);
3110 }
3111
3112 int
3113 xgeommasktogravity(int mask)
3114 {
3115 switch (mask & (XNegative|YNegative)) {
3116 case 0:
3117 return NorthWestGravity;
3118 case XNegative:
3119 return NorthEastGravity;
3120 case YNegative:
3121 return SouthWestGravity;
3122 }
3123 return SouthEastGravity;
3124 }
3125
3126 int
3127 xloadfont(Font *f, FcPattern *pattern)
3128 {
3129 FcPattern *match;
3130 FcResult result;
3131
3132 match = FcFontMatch(NULL, pattern, &result);
3133 if (!match)
3134 return 1;
3135
3136 if (!(f->match = XftFontOpenPattern(xw.dpy, match))) {
3137 FcPatternDestroy(match);
3138 return 1;
3139 }
3140
3141 f->set = NULL;
3142 f->pattern = FcPatternDuplicate(pattern);
3143
3144 f->ascent = f->match->ascent;
3145 f->descent = f->match->descent;
3146 f->lbearing = 0;
3147 f->rbearing = f->match->max_advance_width;
3148
3149 f->height = f->ascent + f->descent;
3150 f->width = f->lbearing + f->rbearing;
3151
3152 return 0;
3153 }
3154
3155 void
3156 xloadfonts(char *fontstr, double fontsize)
3157 {
3158 FcPattern *pattern;
3159 double fontval;
3160 float ceilf(float);
3161
3162 if (fontstr[0] == '-') {
3163 pattern = XftXlfdParse(fontstr, False, False);
3164 } else {
3165 pattern = FcNameParse((FcChar8 *)fontstr);
3166 }
3167
3168 if (!pattern)
3169 die("st: can't open font %s\n", fontstr);
3170
3171 if (fontsize > 1) {
3172 FcPatternDel(pattern, FC_PIXEL_SIZE);
3173 FcPatternDel(pattern, FC_SIZE);
3174 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
3175 usedfontsize = fontsize;
3176 } else {
3177 if (FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval) ==
3178 FcResultMatch) {
3179 usedfontsize = fontval;
3180 } else if (FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval) ==
3181 FcResultMatch) {
3182 usedfontsize = -1;
3183 } else {
3184 /*
3185 * Default font size is 12, if none given. This is to
3186 * have a known usedfontsize value.
3187 */
3188 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
3189 usedfontsize = 12;
3190 }
3191 defaultfontsize = usedfontsize;
3192 }
3193
3194 FcConfigSubstitute(0, pattern, FcMatchPattern);
3195 FcDefaultSubstitute(pattern);
3196
3197 if (xloadfont(&dc.font, pattern))
3198 die("st: can't open font %s\n", fontstr);
3199
3200 if (usedfontsize < 0) {
3201 FcPatternGetDouble(dc.font.match->pattern,
3202 FC_PIXEL_SIZE, 0, &fontval);
3203 usedfontsize = fontval;
3204 if (fontsize == 0)
3205 defaultfontsize = fontval;
3206 }
3207
3208 /* Setting character width and height. */
3209 xw.cw = ceilf(dc.font.width * cwscale);
3210 xw.ch = ceilf(dc.font.height * chscale);
3211
3212 FcPatternDel(pattern, FC_SLANT);
3213 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
3214 if (xloadfont(&dc.ifont, pattern))
3215 die("st: can't open font %s\n", fontstr);
3216
3217 FcPatternDel(pattern, FC_WEIGHT);
3218 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
3219 if (xloadfont(&dc.ibfont, pattern))
3220 die("st: can't open font %s\n", fontstr);
3221
3222 FcPatternDel(pattern, FC_SLANT);
3223 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
3224 if (xloadfont(&dc.bfont, pattern))
3225 die("st: can't open font %s\n", fontstr);
3226
3227 FcPatternDestroy(pattern);
3228 }
3229
3230 void
3231 xunloadfont(Font *f)
3232 {
3233 XftFontClose(xw.dpy, f->match);
3234 FcPatternDestroy(f->pattern);
3235 if (f->set)
3236 FcFontSetDestroy(f->set);
3237 }
3238
3239 void
3240 xunloadfonts(void)
3241 {
3242 /* Free the loaded fonts in the font cache. */
3243 while (frclen > 0)
3244 XftFontClose(xw.dpy, frc[--frclen].font);
3245
3246 xunloadfont(&dc.font);
3247 xunloadfont(&dc.bfont);
3248 xunloadfont(&dc.ifont);
3249 xunloadfont(&dc.ibfont);
3250 }
3251
3252 void
3253 xzoom(const Arg *arg)
3254 {
3255 Arg larg;
3256
3257 larg.f = usedfontsize + arg->f;
3258 xzoomabs(&larg);
3259 }
3260
3261 void
3262 xzoomabs(const Arg *arg)
3263 {
3264 xunloadfonts();
3265 xloadfonts(usedfont, arg->f);
3266 cresize(0, 0);
3267 redraw();
3268 xhints();
3269 }
3270
3271 void
3272 xzoomreset(const Arg *arg)
3273 {
3274 Arg larg;
3275
3276 if (defaultfontsize > 0) {
3277 larg.f = defaultfontsize;
3278 xzoomabs(&larg);
3279 }
3280 }
3281
3282 void
3283 xinit(void)
3284 {
3285 XGCValues gcvalues;
3286 Cursor cursor;
3287 Window parent;
3288 pid_t thispid = getpid();
3289
3290 if (!(xw.dpy = XOpenDisplay(NULL)))
3291 die("Can't open display\n");
3292 xw.scr = XDefaultScreen(xw.dpy);
3293 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
3294
3295 /* font */
3296 if (!FcInit())
3297 die("Could not init fontconfig.\n");
3298
3299 usedfont = (opt_font == NULL)? font : opt_font;
3300 xloadfonts(usedfont, 0);
3301
3302 /* colors */
3303 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
3304 xloadcols();
3305
3306 /* adjust fixed window geometry */
3307 xw.w = 2 * borderpx + term.col * xw.cw;
3308 xw.h = 2 * borderpx + term.row * xw.ch;
3309 if (xw.gm & XNegative)
3310 xw.l += DisplayWidth(xw.dpy, xw.scr) - xw.w - 2;
3311 if (xw.gm & YNegative)
3312 xw.t += DisplayWidth(xw.dpy, xw.scr) - xw.h - 2;
3313
3314 /* Events */
3315 xw.attrs.background_pixel = dc.col[defaultbg].pixel;
3316 xw.attrs.border_pixel = dc.col[defaultbg].pixel;
3317 xw.attrs.bit_gravity = NorthWestGravity;
3318 xw.attrs.event_mask = FocusChangeMask | KeyPressMask
3319 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
3320 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
3321 xw.attrs.colormap = xw.cmap;
3322
3323 if (!(opt_embed && (parent = strtol(opt_embed, NULL, 0))))
3324 parent = XRootWindow(xw.dpy, xw.scr);
3325 xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
3326 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
3327 xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
3328 | CWEventMask | CWColormap, &xw.attrs);
3329
3330 memset(&gcvalues, 0, sizeof(gcvalues));
3331 gcvalues.graphics_exposures = False;
3332 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
3333 &gcvalues);
3334 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
3335 DefaultDepth(xw.dpy, xw.scr));
3336 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
3337 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
3338
3339 /* Xft rendering context */
3340 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
3341
3342 /* input methods */
3343 if ((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3344 XSetLocaleModifiers("@im=local");
3345 if ((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3346 XSetLocaleModifiers("@im=");
3347 if ((xw.xim = XOpenIM(xw.dpy,
3348 NULL, NULL, NULL)) == NULL) {
3349 die("XOpenIM failed. Could not open input"
3350 " device.\n");
3351 }
3352 }
3353 }
3354 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
3355 | XIMStatusNothing, XNClientWindow, xw.win,
3356 XNFocusWindow, xw.win, NULL);
3357 if (xw.xic == NULL)
3358 die("XCreateIC failed. Could not obtain input method.\n");
3359
3360 /* white cursor, black outline */
3361 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
3362 XDefineCursor(xw.dpy, xw.win, cursor);
3363 XRecolorCursor(xw.dpy, cursor,
3364 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
3365 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
3366
3367 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
3368 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
3369 xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
3370 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
3371
3372 xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
3373 XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
3374 PropModeReplace, (uchar *)&thispid, 1);
3375
3376 xresettitle();
3377 XMapWindow(xw.dpy, xw.win);
3378 xhints();
3379 XSync(xw.dpy, False);
3380 }
3381
3382 int
3383 xmakeglyphfontspecs(XftGlyphFontSpec *specs, const Glyph *glyphs, int len, int x, int y)
3384 {
3385 float winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch, xp, yp;
3386 ushort mode, prevmode = USHRT_MAX;
3387 Font *font = &dc.font;
3388 int frcflags = FRC_NORMAL;
3389 float runewidth = xw.cw;
3390 Rune rune;
3391 FT_UInt glyphidx;
3392 FcResult fcres;
3393 FcPattern *fcpattern, *fontpattern;
3394 FcFontSet *fcsets[] = { NULL };
3395 FcCharSet *fccharset;
3396 int i, f, numspecs = 0;
3397
3398 for (i = 0, xp = winx, yp = winy + font->ascent; i < len; ++i) {
3399 /* Fetch rune and mode for current glyph. */
3400 rune = glyphs[i].u;
3401 mode = glyphs[i].mode;
3402
3403 /* Skip dummy wide-character spacing. */
3404 if (mode == ATTR_WDUMMY)
3405 continue;
3406
3407 /* Determine font for glyph if different from previous glyph. */
3408 if (prevmode != mode) {
3409 prevmode = mode;
3410 font = &dc.font;
3411 frcflags = FRC_NORMAL;
3412 runewidth = xw.cw * ((mode & ATTR_WIDE) ? 2.0f : 1.0f);
3413 if ((mode & ATTR_ITALIC) && (mode & ATTR_BOLD)) {
3414 font = &dc.ibfont;
3415 frcflags = FRC_ITALICBOLD;
3416 } else if (mode & ATTR_ITALIC) {
3417 font = &dc.ifont;
3418 frcflags = FRC_ITALIC;
3419 } else if (mode & ATTR_BOLD) {
3420 font = &dc.bfont;
3421 frcflags = FRC_BOLD;
3422 }
3423 yp = winy + font->ascent;
3424 }
3425
3426 /* Lookup character index with default font. */
3427 glyphidx = XftCharIndex(xw.dpy, font->match, rune);
3428 if (glyphidx) {
3429 specs[numspecs].font = font->match;
3430 specs[numspecs].glyph = glyphidx;
3431 specs[numspecs].x = (short)xp;
3432 specs[numspecs].y = (short)yp;
3433 xp += runewidth;
3434 numspecs++;
3435 continue;
3436 }
3437
3438 /* Fallback on font cache, search the font cache for match. */
3439 for (f = 0; f < frclen; f++) {
3440 glyphidx = XftCharIndex(xw.dpy, frc[f].font, rune);
3441 /* Everything correct. */
3442 if (glyphidx && frc[f].flags == frcflags)
3443 break;
3444 /* We got a default font for a not found glyph. */
3445 if (!glyphidx && frc[f].flags == frcflags
3446 && frc[f].unicodep == rune) {
3447 break;
3448 }
3449 }
3450
3451 /* Nothing was found. Use fontconfig to find matching font. */
3452 if (f >= frclen) {
3453 if (!font->set)
3454 font->set = FcFontSort(0, font->pattern,
3455 1, 0, &fcres);
3456 fcsets[0] = font->set;
3457
3458 /*
3459 * Nothing was found in the cache. Now use
3460 * some dozen of Fontconfig calls to get the
3461 * font for one single character.
3462 *
3463 * Xft and fontconfig are design failures.
3464 */
3465 fcpattern = FcPatternDuplicate(font->pattern);
3466 fccharset = FcCharSetCreate();
3467
3468 FcCharSetAddChar(fccharset, rune);
3469 FcPatternAddCharSet(fcpattern, FC_CHARSET,
3470 fccharset);
3471 FcPatternAddBool(fcpattern, FC_SCALABLE, 1);
3472
3473 FcConfigSubstitute(0, fcpattern,
3474 FcMatchPattern);
3475 FcDefaultSubstitute(fcpattern);
3476
3477 fontpattern = FcFontSetMatch(0, fcsets, 1,
3478 fcpattern, &fcres);
3479
3480 /*
3481 * Overwrite or create the new cache entry.
3482 */
3483 if (frclen >= LEN(frc)) {
3484 frclen = LEN(frc) - 1;
3485 XftFontClose(xw.dpy, frc[frclen].font);
3486 frc[frclen].unicodep = 0;
3487 }
3488
3489 frc[frclen].font = XftFontOpenPattern(xw.dpy,
3490 fontpattern);
3491 frc[frclen].flags = frcflags;
3492 frc[frclen].unicodep = rune;
3493
3494 glyphidx = XftCharIndex(xw.dpy, frc[frclen].font, rune);
3495
3496 f = frclen;
3497 frclen++;
3498
3499 FcPatternDestroy(fcpattern);
3500 FcCharSetDestroy(fccharset);
3501 }
3502
3503 specs[numspecs].font = frc[f].font;
3504 specs[numspecs].glyph = glyphidx;
3505 specs[numspecs].x = (short)xp;
3506 specs[numspecs].y = (short)(winy + frc[f].font->ascent);
3507 xp += runewidth;
3508 numspecs++;
3509 }
3510
3511 return numspecs;
3512 }
3513
3514 void
3515 xdrawglyphfontspecs(const XftGlyphFontSpec *specs, Glyph base, int len, int x, int y)
3516 {
3517 int charlen = len * ((base.mode & ATTR_WIDE) ? 2 : 1);
3518 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
3519 width = charlen * xw.cw;
3520 Color *fg, *bg, *temp, revfg, revbg, truefg, truebg;
3521 XRenderColor colfg, colbg;
3522 XRectangle r;
3523
3524 /* Determine foreground and background colors based on mode. */
3525 if (base.fg == defaultfg) {
3526 if (base.mode & ATTR_ITALIC)
3527 base.fg = defaultitalic;
3528 else if ((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD))
3529 base.fg = defaultitalic;
3530 else if (base.mode & ATTR_UNDERLINE)
3531 base.fg = defaultunderline;
3532 }
3533
3534 if (IS_TRUECOL(base.fg)) {
3535 colfg.alpha = 0xffff;
3536 colfg.red = TRUERED(base.fg);
3537 colfg.green = TRUEGREEN(base.fg);
3538 colfg.blue = TRUEBLUE(base.fg);
3539 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
3540 fg = &truefg;
3541 } else {
3542 fg = &dc.col[base.fg];
3543 }
3544
3545 if (IS_TRUECOL(base.bg)) {
3546 colbg.alpha = 0xffff;
3547 colbg.green = TRUEGREEN(base.bg);
3548 colbg.red = TRUERED(base.bg);
3549 colbg.blue = TRUEBLUE(base.bg);
3550 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
3551 bg = &truebg;
3552 } else {
3553 bg = &dc.col[base.bg];
3554 }
3555
3556 /* Change basic system colors [0-7] to bright system colors [8-15] */
3557 if ((base.mode & ATTR_BOLD_FAINT) == ATTR_BOLD && BETWEEN(base.fg, 0, 7))
3558 fg = &dc.col[base.fg + 8];
3559
3560 if (IS_SET(MODE_REVERSE)) {
3561 if (fg == &dc.col[defaultfg]) {
3562 fg = &dc.col[defaultbg];
3563 } else {
3564 colfg.red = ~fg->color.red;
3565 colfg.green = ~fg->color.green;
3566 colfg.blue = ~fg->color.blue;
3567 colfg.alpha = fg->color.alpha;
3568 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
3569 &revfg);
3570 fg = &revfg;
3571 }
3572
3573 if (bg == &dc.col[defaultbg]) {
3574 bg = &dc.col[defaultfg];
3575 } else {
3576 colbg.red = ~bg->color.red;
3577 colbg.green = ~bg->color.green;
3578 colbg.blue = ~bg->color.blue;
3579 colbg.alpha = bg->color.alpha;
3580 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
3581 &revbg);
3582 bg = &revbg;
3583 }
3584 }
3585
3586 if (base.mode & ATTR_REVERSE) {
3587 temp = fg;
3588 fg = bg;
3589 bg = temp;
3590 }
3591
3592 if ((base.mode & ATTR_BOLD_FAINT) == ATTR_FAINT) {
3593 colfg.red = fg->color.red / 2;
3594 colfg.green = fg->color.green / 2;
3595 colfg.blue = fg->color.blue / 2;
3596 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
3597 fg = &revfg;
3598 }
3599
3600 if (base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
3601 fg = bg;
3602
3603 if (base.mode & ATTR_INVISIBLE)
3604 fg = bg;
3605
3606 /* Intelligent cleaning up of the borders. */
3607 if (x == 0) {
3608 xclear(0, (y == 0)? 0 : winy, borderpx,
3609 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
3610 }
3611 if (x + charlen >= term.col) {
3612 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
3613 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
3614 }
3615 if (y == 0)
3616 xclear(winx, 0, winx + width, borderpx);
3617 if (y == term.row-1)
3618 xclear(winx, winy + xw.ch, winx + width, xw.h);
3619
3620 /* Clean up the region we want to draw to. */
3621 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
3622
3623 /* Set the clip region because Xft is sometimes dirty. */
3624 r.x = 0;
3625 r.y = 0;
3626 r.height = xw.ch;
3627 r.width = width;
3628 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
3629
3630 /* Render the glyphs. */
3631 XftDrawGlyphFontSpec(xw.draw, fg, specs, len);
3632
3633 /* Render underline and strikethrough. */
3634 if (base.mode & ATTR_UNDERLINE) {
3635 XftDrawRect(xw.draw, fg, winx, winy + dc.font.ascent + 1,
3636 width, 1);
3637 }
3638
3639 if (base.mode & ATTR_STRUCK) {
3640 XftDrawRect(xw.draw, fg, winx, winy + 2 * dc.font.ascent / 3,
3641 width, 1);
3642 }
3643
3644 /* Reset clip to none. */
3645 XftDrawSetClip(xw.draw, 0);
3646 }
3647
3648 void
3649 xdrawglyph(Glyph g, int x, int y)
3650 {
3651 int numspecs;
3652 XftGlyphFontSpec spec;
3653 numspecs = xmakeglyphfontspecs(&spec, &g, 1, x, y);
3654 xdrawglyphfontspecs(&spec, g, numspecs, x, y);
3655 }
3656
3657 void
3658 xdrawcursor(void)
3659 {
3660 static int oldx = 0, oldy = 0;
3661 int curx;
3662 Glyph g = {' ', ATTR_NULL, defaultbg, defaultcs};
3663
3664 LIMIT(oldx, 0, term.col-1);
3665 LIMIT(oldy, 0, term.row-1);
3666
3667 curx = term.c.x;
3668
3669 /* adjust position if in dummy */
3670 if (term.line[oldy][oldx].mode & ATTR_WDUMMY)
3671 oldx--;
3672 if (term.line[term.c.y][curx].mode & ATTR_WDUMMY)
3673 curx--;
3674
3675 g.u = term.line[term.c.y][term.c.x].u;
3676
3677 /* remove the old cursor */
3678 xdrawglyph(term.line[oldy][oldx], oldx, oldy);
3679
3680 if (IS_SET(MODE_HIDE))
3681 return;
3682
3683 /* draw the new one */
3684 if (xw.state & WIN_FOCUSED) {
3685 switch (xw.cursor) {
3686 case 0: /* Blinking Block */
3687 case 1: /* Blinking Block (Default) */
3688 case 2: /* Steady Block */
3689 if (IS_SET(MODE_REVERSE)) {
3690 g.mode |= ATTR_REVERSE;
3691 g.fg = defaultcs;
3692 g.bg = defaultfg;
3693 }
3694
3695 g.mode |= term.line[term.c.y][curx].mode & ATTR_WIDE;
3696 xdrawglyph(g, term.c.x, term.c.y);
3697 break;
3698 case 3: /* Blinking Underline */
3699 case 4: /* Steady Underline */
3700 XftDrawRect(xw.draw, &dc.col[defaultcs],
3701 borderpx + curx * xw.cw,
3702 borderpx + (term.c.y + 1) * xw.ch - cursorthickness,
3703 xw.cw, cursorthickness);
3704 break;
3705 case 5: /* Blinking bar */
3706 case 6: /* Steady bar */
3707 XftDrawRect(xw.draw, &dc.col[defaultcs],
3708 borderpx + curx * xw.cw,
3709 borderpx + term.c.y * xw.ch,
3710 cursorthickness, xw.ch);
3711 break;
3712 }
3713 } else {
3714 XftDrawRect(xw.draw, &dc.col[defaultcs],
3715 borderpx + curx * xw.cw,
3716 borderpx + term.c.y * xw.ch,
3717 xw.cw - 1, 1);
3718 XftDrawRect(xw.draw, &dc.col[defaultcs],
3719 borderpx + curx * xw.cw,
3720 borderpx + term.c.y * xw.ch,
3721 1, xw.ch - 1);
3722 XftDrawRect(xw.draw, &dc.col[defaultcs],
3723 borderpx + (curx + 1) * xw.cw - 1,
3724 borderpx + term.c.y * xw.ch,
3725 1, xw.ch - 1);
3726 XftDrawRect(xw.draw, &dc.col[defaultcs],
3727 borderpx + curx * xw.cw,
3728 borderpx + (term.c.y + 1) * xw.ch - 1,
3729 xw.cw, 1);
3730 }
3731 oldx = curx, oldy = term.c.y;
3732 }
3733
3734
3735 void
3736 xsettitle(char *p)
3737 {
3738 XTextProperty prop;
3739
3740 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3741 &prop);
3742 XSetWMName(xw.dpy, xw.win, &prop);
3743 XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
3744 XFree(prop.value);
3745 }
3746
3747 void
3748 xresettitle(void)
3749 {
3750 xsettitle(opt_title ? opt_title : "st");
3751 }
3752
3753 void
3754 redraw(void)
3755 {
3756 tfulldirt();
3757 draw();
3758 }
3759
3760 void
3761 draw(void)
3762 {
3763 drawregion(0, 0, term.col, term.row);
3764 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3765 xw.h, 0, 0);
3766 XSetForeground(xw.dpy, dc.gc,
3767 dc.col[IS_SET(MODE_REVERSE)?
3768 defaultfg : defaultbg].pixel);
3769 }
3770
3771 void
3772 drawregion(int x1, int y1, int x2, int y2)
3773 {
3774 int i, x, y, ox, numspecs;
3775 Glyph base, new;
3776 XftGlyphFontSpec* specs;
3777 int ena_sel = sel.ob.x != -1 && sel.alt == IS_SET(MODE_ALTSCREEN);
3778
3779 if (!(xw.state & WIN_VISIBLE))
3780 return;
3781
3782 for (y = y1; y < y2; y++) {
3783 if (!term.dirty[y])
3784 continue;
3785
3786 xtermclear(0, y, term.col, y);
3787 term.dirty[y] = 0;
3788
3789 specs = term.specbuf;
3790 numspecs = xmakeglyphfontspecs(specs, &term.line[y][x1], x2 - x1, x1, y);
3791
3792 i = ox = 0;
3793 for (x = x1; x < x2 && i < numspecs; x++) {
3794 new = term.line[y][x];
3795 if (new.mode == ATTR_WDUMMY)
3796 continue;
3797 if (ena_sel && selected(x, y))
3798 new.mode ^= ATTR_REVERSE;
3799 if (i > 0 && ATTRCMP(base, new)) {
3800 xdrawglyphfontspecs(specs, base, i, ox, y);
3801 specs += i;
3802 numspecs -= i;
3803 i = 0;
3804 }
3805 if (i == 0) {
3806 ox = x;
3807 base = new;
3808 }
3809 i++;
3810 }
3811 if (i > 0)
3812 xdrawglyphfontspecs(specs, base, i, ox, y);
3813 }
3814 xdrawcursor();
3815 }
3816
3817 void
3818 expose(XEvent *ev)
3819 {
3820 redraw();
3821 }
3822
3823 void
3824 visibility(XEvent *ev)
3825 {
3826 XVisibilityEvent *e = &ev->xvisibility;
3827
3828 MODBIT(xw.state, e->state != VisibilityFullyObscured, WIN_VISIBLE);
3829 }
3830
3831 void
3832 unmap(XEvent *ev)
3833 {
3834 xw.state &= ~WIN_VISIBLE;
3835 }
3836
3837 void
3838 xsetpointermotion(int set)
3839 {
3840 MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
3841 XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
3842 }
3843
3844 void
3845 xseturgency(int add)
3846 {
3847 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3848
3849 MODBIT(h->flags, add, XUrgencyHint);
3850 XSetWMHints(xw.dpy, xw.win, h);
3851 XFree(h);
3852 }
3853
3854 void
3855 focus(XEvent *ev)
3856 {
3857 XFocusChangeEvent *e = &ev->xfocus;
3858
3859 if (e->mode == NotifyGrab)
3860 return;
3861
3862 if (ev->type == FocusIn) {
3863 XSetICFocus(xw.xic);
3864 xw.state |= WIN_FOCUSED;
3865 xseturgency(0);
3866 if (IS_SET(MODE_FOCUS))
3867 ttywrite("\033[I", 3);
3868 } else {
3869 XUnsetICFocus(xw.xic);
3870 xw.state &= ~WIN_FOCUSED;
3871 if (IS_SET(MODE_FOCUS))
3872 ttywrite("\033[O", 3);
3873 }
3874 }
3875
3876 int
3877 match(uint mask, uint state)
3878 {
3879 return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
3880 }
3881
3882 void
3883 numlock(const Arg *dummy)
3884 {
3885 term.numlock ^= 1;
3886 }
3887
3888 char*
3889 kmap(KeySym k, uint state)
3890 {
3891 Key *kp;
3892 int i;
3893
3894 /* Check for mapped keys out of X11 function keys. */
3895 for (i = 0; i < LEN(mappedkeys); i++) {
3896 if (mappedkeys[i] == k)
3897 break;
3898 }
3899 if (i == LEN(mappedkeys)) {
3900 if ((k & 0xFFFF) < 0xFD00)
3901 return NULL;
3902 }
3903
3904 for (kp = key; kp < key + LEN(key); kp++) {
3905 if (kp->k != k)
3906 continue;
3907
3908 if (!match(kp->mask, state))
3909 continue;
3910
3911 if (IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
3912 continue;
3913 if (term.numlock && kp->appkey == 2)
3914 continue;
3915
3916 if (IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
3917 continue;
3918
3919 if (IS_SET(MODE_CRLF) ? kp->crlf < 0 : kp->crlf > 0)
3920 continue;
3921
3922 return kp->s;
3923 }
3924
3925 return NULL;
3926 }
3927
3928 void
3929 kpress(XEvent *ev)
3930 {
3931 XKeyEvent *e = &ev->xkey;
3932 KeySym ksym;
3933 char buf[32], *customkey;
3934 int len;
3935 Rune c;
3936 Status status;
3937 Shortcut *bp;
3938
3939 if (IS_SET(MODE_KBDLOCK))
3940 return;
3941
3942 len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
3943 /* 1. shortcuts */
3944 for (bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3945 if (ksym == bp->keysym && match(bp->mod, e->state)) {
3946 bp->func(&(bp->arg));
3947 return;
3948 }
3949 }
3950
3951 /* 2. custom keys from config.h */
3952 if ((customkey = kmap(ksym, e->state))) {
3953 ttysend(customkey, strlen(customkey));
3954 return;
3955 }
3956
3957 /* 3. composed string from input method */
3958 if (len == 0)
3959 return;
3960 if (len == 1 && e->state & Mod1Mask) {
3961 if (IS_SET(MODE_8BIT)) {
3962 if (*buf < 0177) {
3963 c = *buf | 0x80;
3964 len = utf8encode(c, buf);
3965 }
3966 } else {
3967 buf[1] = buf[0];
3968 buf[0] = '\033';
3969 len = 2;
3970 }
3971 }
3972 ttysend(buf, len);
3973 }
3974
3975
3976 void
3977 cmessage(XEvent *e)
3978 {
3979 /*
3980 * See xembed specs
3981 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3982 */
3983 if (e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3984 if (e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3985 xw.state |= WIN_FOCUSED;
3986 xseturgency(0);
3987 } else if (e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3988 xw.state &= ~WIN_FOCUSED;
3989 }
3990 } else if (e->xclient.data.l[0] == xw.wmdeletewin) {
3991 /* Send SIGHUP to shell */
3992 kill(pid, SIGHUP);
3993 exit(0);
3994 }
3995 }
3996
3997 void
3998 cresize(int width, int height)
3999 {
4000 int col, row;
4001
4002 if (width != 0)
4003 xw.w = width;
4004 if (height != 0)
4005 xw.h = height;
4006
4007 col = (xw.w - 2 * borderpx) / xw.cw;
4008 row = (xw.h - 2 * borderpx) / xw.ch;
4009
4010 tresize(col, row);
4011 xresize(col, row);
4012 ttyresize();
4013 }
4014
4015 void
4016 resize(XEvent *e)
4017 {
4018 if (e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
4019 return;
4020
4021 cresize(e->xconfigure.width, e->xconfigure.height);
4022 }
4023
4024 void
4025 run(void)
4026 {
4027 XEvent ev;
4028 int w = xw.w, h = xw.h;
4029 fd_set rfd;
4030 int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
4031 struct timespec drawtimeout, *tv = NULL, now, last, lastblink;
4032 long deltatime;
4033
4034 /* Waiting for window mapping */
4035 do {
4036 XNextEvent(xw.dpy, &ev);
4037 /*
4038 * XFilterEvent is required to be called after you using XOpenIM,
4039 * this is not unnecessary.It does not only filter the key event,
4040 * but some clientmessage for input method as well.
4041 */
4042 if (XFilterEvent(&ev, None))
4043 continue;
4044 if (ev.type == ConfigureNotify) {
4045 w = ev.xconfigure.width;
4046 h = ev.xconfigure.height;
4047 }
4048 } while (ev.type != MapNotify);
4049
4050 ttynew();
4051 cresize(w, h);
4052
4053 clock_gettime(CLOCK_MONOTONIC, &last);
4054 lastblink = last;
4055
4056 for (xev = actionfps;;) {
4057 FD_ZERO(&rfd);
4058 FD_SET(cmdfd, &rfd);
4059 FD_SET(xfd, &rfd);
4060
4061 if (pselect(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv, NULL) < 0) {
4062 if (errno == EINTR)
4063 continue;
4064 die("select failed: %s\n", strerror(errno));
4065 }
4066 if (FD_ISSET(cmdfd, &rfd)) {
4067 ttyread();
4068 if (blinktimeout) {
4069 blinkset = tattrset(ATTR_BLINK);
4070 if (!blinkset)
4071 MODBIT(term.mode, 0, MODE_BLINK);
4072 }
4073 }
4074
4075 if (FD_ISSET(xfd, &rfd))
4076 xev = actionfps;
4077
4078 clock_gettime(CLOCK_MONOTONIC, &now);
4079 drawtimeout.tv_sec = 0;
4080 drawtimeout.tv_nsec = (1000 * 1E6)/ xfps;
4081 tv = &drawtimeout;
4082
4083 dodraw = 0;
4084 if (blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
4085 tsetdirtattr(ATTR_BLINK);
4086 term.mode ^= MODE_BLINK;
4087 lastblink = now;
4088 dodraw = 1;
4089 }
4090 deltatime = TIMEDIFF(now, last);
4091 if (deltatime > 1000 / (xev ? xfps : actionfps)) {
4092 dodraw = 1;
4093 last = now;
4094 }
4095
4096 if (dodraw) {
4097 while (XPending(xw.dpy)) {
4098 XNextEvent(xw.dpy, &ev);
4099 if (XFilterEvent(&ev, None))
4100 continue;
4101 if (handler[ev.type])
4102 (handler[ev.type])(&ev);
4103 }
4104
4105 draw();
4106 XFlush(xw.dpy);
4107
4108 if (xev && !FD_ISSET(xfd, &rfd))
4109 xev--;
4110 if (!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
4111 if (blinkset) {
4112 if (TIMEDIFF(now, lastblink) \
4113 > blinktimeout) {
4114 drawtimeout.tv_nsec = 1000;
4115 } else {
4116 drawtimeout.tv_nsec = (1E6 * \
4117 (blinktimeout - \
4118 TIMEDIFF(now,
4119 lastblink)));
4120 }
4121 drawtimeout.tv_sec = \
4122 drawtimeout.tv_nsec / 1E9;
4123 drawtimeout.tv_nsec %= (long)1E9;
4124 } else {
4125 tv = NULL;
4126 }
4127 }
4128 }
4129 }
4130 }
4131
4132 void
4133 usage(void)
4134 {
4135 die("%s " VERSION " (c) 2010-2015 st engineers\n"
4136 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]\n"
4137 " [-i] [-t title] [-w windowid] [-e command ...] [command ...]\n"
4138 " st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]\n"
4139 " [-i] [-t title] [-w windowid] [-l line] [stty_args ...]\n",
4140 argv0);
4141 }
4142
4143 int
4144 main(int argc, char *argv[])
4145 {
4146 uint cols = 80, rows = 24;
4147
4148 xw.l = xw.t = 0;
4149 xw.isfixed = False;
4150 xw.cursor = 0;
4151
4152 ARGBEGIN {
4153 case 'a':
4154 allowaltscreen = 0;
4155 break;
4156 case 'c':
4157 opt_class = EARGF(usage());
4158 break;
4159 case 'e':
4160 if (argc > 0)
4161 --argc, ++argv;
4162 goto run;
4163 case 'f':
4164 opt_font = EARGF(usage());
4165 break;
4166 case 'g':
4167 xw.gm = XParseGeometry(EARGF(usage()),
4168 &xw.l, &xw.t, &cols, &rows);
4169 break;
4170 case 'i':
4171 xw.isfixed = 1;
4172 break;
4173 case 'o':
4174 opt_io = EARGF(usage());
4175 break;
4176 case 'l':
4177 opt_line = EARGF(usage());
4178 break;
4179 case 't':
4180 opt_title = EARGF(usage());
4181 break;
4182 case 'w':
4183 opt_embed = EARGF(usage());
4184 break;
4185 case 'v':
4186 default:
4187 usage();
4188 } ARGEND;
4189
4190 run:
4191 if (argc > 0) {
4192 /* eat all remaining arguments */
4193 opt_cmd = argv;
4194 if (!opt_title && !opt_line)
4195 opt_title = basename(xstrdup(argv[0]));
4196 }
4197 setlocale(LC_CTYPE, "");
4198 XSetLocaleModifiers("");
4199 tnew(MAX(cols, 1), MAX(rows, 1));
4200 xinit();
4201 selinit();
4202 run();
4203
4204 return 0;
4205 }