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b052b2bc5a45f21a05abc395c46a9b2854f3f876
[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 size_t aux = len;
555
556 while(len > 0) {
557 ssize_t r = write(fd, s, len);
558 if(r < 0)
559 return r;
560 len -= r;
561 s += r;
562 }
563 return aux;
564 }
565
566 void *
567 xmalloc(size_t len) {
568 void *p = malloc(len);
569
570 if(!p)
571 die("Out of memory\n");
572
573 return p;
574 }
575
576 void *
577 xrealloc(void *p, size_t len) {
578 if((p = realloc(p, len)) == NULL)
579 die("Out of memory\n");
580
581 return p;
582 }
583
584 char *
585 xstrdup(char *s) {
586 if((s = strdup(s)) == NULL)
587 die("Out of memory\n");
588
589 return s;
590 }
591
592 size_t
593 utf8decode(char *c, Rune *u, size_t clen) {
594 size_t i, j, len, type;
595 Rune udecoded;
596
597 *u = UTF_INVALID;
598 if(!clen)
599 return 0;
600 udecoded = utf8decodebyte(c[0], &len);
601 if(!BETWEEN(len, 1, UTF_SIZ))
602 return 1;
603 for(i = 1, j = 1; i < clen && j < len; ++i, ++j) {
604 udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
605 if(type != 0)
606 return j;
607 }
608 if(j < len)
609 return 0;
610 *u = udecoded;
611 utf8validate(u, len);
612 return len;
613 }
614
615 Rune
616 utf8decodebyte(char c, size_t *i) {
617 for(*i = 0; *i < LEN(utfmask); ++(*i))
618 if(((uchar)c & utfmask[*i]) == utfbyte[*i])
619 return (uchar)c & ~utfmask[*i];
620 return 0;
621 }
622
623 size_t
624 utf8encode(Rune u, char *c) {
625 size_t len, i;
626
627 len = utf8validate(&u, 0);
628 if(len > UTF_SIZ)
629 return 0;
630 for(i = len - 1; i != 0; --i) {
631 c[i] = utf8encodebyte(u, 0);
632 u >>= 6;
633 }
634 c[0] = utf8encodebyte(u, len);
635 return len;
636 }
637
638 char
639 utf8encodebyte(Rune u, size_t i) {
640 return utfbyte[i] | (u & ~utfmask[i]);
641 }
642
643 char *
644 utf8strchr(char *s, Rune u) {
645 Rune r;
646 size_t i, j, len;
647
648 len = strlen(s);
649 for(i = 0, j = 0; i < len; i += j) {
650 if(!(j = utf8decode(&s[i], &r, len - i)))
651 break;
652 if(r == u)
653 return &(s[i]);
654 }
655 return NULL;
656 }
657
658 size_t
659 utf8validate(Rune *u, size_t i) {
660 if(!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF))
661 *u = UTF_INVALID;
662 for(i = 1; *u > utfmax[i]; ++i)
663 ;
664 return i;
665 }
666
667 void
668 selinit(void) {
669 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
670 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
671 sel.mode = SEL_IDLE;
672 sel.ob.x = -1;
673 sel.primary = NULL;
674 sel.clipboard = NULL;
675 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
676 if(sel.xtarget == None)
677 sel.xtarget = XA_STRING;
678 }
679
680 int
681 x2col(int x) {
682 x -= borderpx;
683 x /= xw.cw;
684
685 return LIMIT(x, 0, term.col-1);
686 }
687
688 int
689 y2row(int y) {
690 y -= borderpx;
691 y /= xw.ch;
692
693 return LIMIT(y, 0, term.row-1);
694 }
695
696 int
697 tlinelen(int y) {
698 int i = term.col;
699
700 if(term.line[y][i - 1].mode & ATTR_WRAP)
701 return i;
702
703 while(i > 0 && term.line[y][i - 1].u == ' ')
704 --i;
705
706 return i;
707 }
708
709 void
710 selnormalize(void) {
711 int i;
712
713 if(sel.type == SEL_REGULAR && sel.ob.y != sel.oe.y) {
714 sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
715 sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
716 } else {
717 sel.nb.x = MIN(sel.ob.x, sel.oe.x);
718 sel.ne.x = MAX(sel.ob.x, sel.oe.x);
719 }
720 sel.nb.y = MIN(sel.ob.y, sel.oe.y);
721 sel.ne.y = MAX(sel.ob.y, sel.oe.y);
722
723 selsnap(&sel.nb.x, &sel.nb.y, -1);
724 selsnap(&sel.ne.x, &sel.ne.y, +1);
725
726 /* expand selection over line breaks */
727 if (sel.type == SEL_RECTANGULAR)
728 return;
729 i = tlinelen(sel.nb.y);
730 if (i < sel.nb.x)
731 sel.nb.x = i;
732 if (tlinelen(sel.ne.y) <= sel.ne.x)
733 sel.ne.x = term.col - 1;
734 }
735
736 int
737 selected(int x, int y) {
738 if(sel.mode == SEL_EMPTY)
739 return 0;
740
741 if(sel.type == SEL_RECTANGULAR)
742 return BETWEEN(y, sel.nb.y, sel.ne.y)
743 && BETWEEN(x, sel.nb.x, sel.ne.x);
744
745 return BETWEEN(y, sel.nb.y, sel.ne.y)
746 && (y != sel.nb.y || x >= sel.nb.x)
747 && (y != sel.ne.y || x <= sel.ne.x);
748 }
749
750 void
751 selsnap(int *x, int *y, int direction) {
752 int newx, newy, xt, yt;
753 int delim, prevdelim;
754 Glyph *gp, *prevgp;
755
756 switch(sel.snap) {
757 case SNAP_WORD:
758 /*
759 * Snap around if the word wraps around at the end or
760 * beginning of a line.
761 */
762 prevgp = &term.line[*y][*x];
763 prevdelim = ISDELIM(prevgp->u);
764 for(;;) {
765 newx = *x + direction;
766 newy = *y;
767 if(!BETWEEN(newx, 0, term.col - 1)) {
768 newy += direction;
769 newx = (newx + term.col) % term.col;
770 if (!BETWEEN(newy, 0, term.row - 1))
771 break;
772
773 if(direction > 0)
774 yt = *y, xt = *x;
775 else
776 yt = newy, xt = newx;
777 if(!(term.line[yt][xt].mode & ATTR_WRAP))
778 break;
779 }
780
781 if (newx >= tlinelen(newy))
782 break;
783
784 gp = &term.line[newy][newx];
785 delim = ISDELIM(gp->u);
786 if(!(gp->mode & ATTR_WDUMMY) && (delim != prevdelim
787 || (delim && gp->u != prevgp->u)))
788 break;
789
790 *x = newx;
791 *y = newy;
792 prevgp = gp;
793 prevdelim = delim;
794 }
795 break;
796 case SNAP_LINE:
797 /*
798 * Snap around if the the previous line or the current one
799 * has set ATTR_WRAP at its end. Then the whole next or
800 * previous line will be selected.
801 */
802 *x = (direction < 0) ? 0 : term.col - 1;
803 if(direction < 0) {
804 for(; *y > 0; *y += direction) {
805 if(!(term.line[*y-1][term.col-1].mode
806 & ATTR_WRAP)) {
807 break;
808 }
809 }
810 } else if(direction > 0) {
811 for(; *y < term.row-1; *y += direction) {
812 if(!(term.line[*y][term.col-1].mode
813 & ATTR_WRAP)) {
814 break;
815 }
816 }
817 }
818 break;
819 }
820 }
821
822 void
823 getbuttoninfo(XEvent *e) {
824 int type;
825 uint state = e->xbutton.state & ~(Button1Mask | forceselmod);
826
827 sel.alt = IS_SET(MODE_ALTSCREEN);
828
829 sel.oe.x = x2col(e->xbutton.x);
830 sel.oe.y = y2row(e->xbutton.y);
831 selnormalize();
832
833 sel.type = SEL_REGULAR;
834 for(type = 1; type < LEN(selmasks); ++type) {
835 if(match(selmasks[type], state)) {
836 sel.type = type;
837 break;
838 }
839 }
840 }
841
842 void
843 mousereport(XEvent *e) {
844 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
845 button = e->xbutton.button, state = e->xbutton.state,
846 len;
847 char buf[40];
848 static int ox, oy;
849
850 /* from urxvt */
851 if(e->xbutton.type == MotionNotify) {
852 if(x == ox && y == oy)
853 return;
854 if(!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
855 return;
856 /* MOUSE_MOTION: no reporting if no button is pressed */
857 if(IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
858 return;
859
860 button = oldbutton + 32;
861 ox = x;
862 oy = y;
863 } else {
864 if(!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
865 button = 3;
866 } else {
867 button -= Button1;
868 if(button >= 3)
869 button += 64 - 3;
870 }
871 if(e->xbutton.type == ButtonPress) {
872 oldbutton = button;
873 ox = x;
874 oy = y;
875 } else if(e->xbutton.type == ButtonRelease) {
876 oldbutton = 3;
877 /* MODE_MOUSEX10: no button release reporting */
878 if(IS_SET(MODE_MOUSEX10))
879 return;
880 if (button == 64 || button == 65)
881 return;
882 }
883 }
884
885 if(!IS_SET(MODE_MOUSEX10)) {
886 button += ((state & ShiftMask ) ? 4 : 0)
887 + ((state & Mod4Mask ) ? 8 : 0)
888 + ((state & ControlMask) ? 16 : 0);
889 }
890
891 if(IS_SET(MODE_MOUSESGR)) {
892 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
893 button, x+1, y+1,
894 e->xbutton.type == ButtonRelease ? 'm' : 'M');
895 } else if(x < 223 && y < 223) {
896 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
897 32+button, 32+x+1, 32+y+1);
898 } else {
899 return;
900 }
901
902 ttywrite(buf, len);
903 }
904
905 void
906 bpress(XEvent *e) {
907 struct timespec now;
908 Mousekey *mk;
909
910 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
911 mousereport(e);
912 return;
913 }
914
915 for(mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
916 if(e->xbutton.button == mk->b
917 && match(mk->mask, e->xbutton.state)) {
918 ttysend(mk->s, strlen(mk->s));
919 return;
920 }
921 }
922
923 if(e->xbutton.button == Button1) {
924 clock_gettime(CLOCK_MONOTONIC, &now);
925
926 /* Clear previous selection, logically and visually. */
927 selclear(NULL);
928 sel.mode = SEL_EMPTY;
929 sel.type = SEL_REGULAR;
930 sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
931 sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
932
933 /*
934 * If the user clicks below predefined timeouts specific
935 * snapping behaviour is exposed.
936 */
937 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
938 sel.snap = SNAP_LINE;
939 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
940 sel.snap = SNAP_WORD;
941 } else {
942 sel.snap = 0;
943 }
944 selnormalize();
945
946 if(sel.snap != 0)
947 sel.mode = SEL_READY;
948 tsetdirt(sel.nb.y, sel.ne.y);
949 sel.tclick2 = sel.tclick1;
950 sel.tclick1 = now;
951 }
952 }
953
954 char *
955 getsel(void) {
956 char *str, *ptr;
957 int y, bufsize, lastx, linelen;
958 Glyph *gp, *last;
959
960 if(sel.ob.x == -1)
961 return NULL;
962
963 bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
964 ptr = str = xmalloc(bufsize);
965
966 /* append every set & selected glyph to the selection */
967 for(y = sel.nb.y; y <= sel.ne.y; y++) {
968 linelen = tlinelen(y);
969
970 if(sel.type == SEL_RECTANGULAR) {
971 gp = &term.line[y][sel.nb.x];
972 lastx = sel.ne.x;
973 } else {
974 gp = &term.line[y][sel.nb.y == y ? sel.nb.x : 0];
975 lastx = (sel.ne.y == y) ? sel.ne.x : term.col-1;
976 }
977 last = &term.line[y][MIN(lastx, linelen-1)];
978 while(last >= gp && last->u == ' ')
979 --last;
980
981 for( ; gp <= last; ++gp) {
982 if(gp->mode & ATTR_WDUMMY)
983 continue;
984
985 ptr += utf8encode(gp->u, ptr);
986 }
987
988 /*
989 * Copy and pasting of line endings is inconsistent
990 * in the inconsistent terminal and GUI world.
991 * The best solution seems like to produce '\n' when
992 * something is copied from st and convert '\n' to
993 * '\r', when something to be pasted is received by
994 * st.
995 * FIXME: Fix the computer world.
996 */
997 if((y < sel.ne.y || lastx >= linelen) && !(last->mode & ATTR_WRAP))
998 *ptr++ = '\n';
999 }
1000 *ptr = 0;
1001 return str;
1002 }
1003
1004 void
1005 selcopy(Time t) {
1006 xsetsel(getsel(), t);
1007 }
1008
1009 void
1010 selnotify(XEvent *e) {
1011 ulong nitems, ofs, rem;
1012 int format;
1013 uchar *data, *last, *repl;
1014 Atom type;
1015 XSelectionEvent *xsev;
1016
1017 ofs = 0;
1018 xsev = &e->xselection;
1019 if (xsev->property == None)
1020 return;
1021 do {
1022 if(XGetWindowProperty(xw.dpy, xw.win, xsev->property, ofs,
1023 BUFSIZ/4, False, AnyPropertyType,
1024 &type, &format, &nitems, &rem,
1025 &data)) {
1026 fprintf(stderr, "Clipboard allocation failed\n");
1027 return;
1028 }
1029
1030 /*
1031 * As seen in getsel:
1032 * Line endings are inconsistent in the terminal and GUI world
1033 * copy and pasting. When receiving some selection data,
1034 * replace all '\n' with '\r'.
1035 * FIXME: Fix the computer world.
1036 */
1037 repl = data;
1038 last = data + nitems * format / 8;
1039 while((repl = memchr(repl, '\n', last - repl))) {
1040 *repl++ = '\r';
1041 }
1042
1043 if(IS_SET(MODE_BRCKTPASTE))
1044 ttywrite("\033[200~", 6);
1045 ttysend((char *)data, nitems * format / 8);
1046 if(IS_SET(MODE_BRCKTPASTE))
1047 ttywrite("\033[201~", 6);
1048 XFree(data);
1049 /* number of 32-bit chunks returned */
1050 ofs += nitems * format / 32;
1051 } while(rem > 0);
1052 }
1053
1054 void
1055 selpaste(const Arg *dummy) {
1056 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
1057 xw.win, CurrentTime);
1058 }
1059
1060 void
1061 clipcopy(const Arg *dummy) {
1062 Atom clipboard;
1063
1064 if(sel.clipboard != NULL)
1065 free(sel.clipboard);
1066
1067 if(sel.primary != NULL) {
1068 sel.clipboard = xstrdup(sel.primary);
1069 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1070 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
1071 }
1072 }
1073
1074 void
1075 clippaste(const Arg *dummy) {
1076 Atom clipboard;
1077
1078 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1079 XConvertSelection(xw.dpy, clipboard, sel.xtarget, clipboard,
1080 xw.win, CurrentTime);
1081 }
1082
1083 void
1084 selclear(XEvent *e) {
1085 if(sel.ob.x == -1)
1086 return;
1087 sel.mode = SEL_IDLE;
1088 sel.ob.x = -1;
1089 tsetdirt(sel.nb.y, sel.ne.y);
1090 }
1091
1092 void
1093 selrequest(XEvent *e) {
1094 XSelectionRequestEvent *xsre;
1095 XSelectionEvent xev;
1096 Atom xa_targets, string, clipboard;
1097 char *seltext;
1098
1099 xsre = (XSelectionRequestEvent *) e;
1100 xev.type = SelectionNotify;
1101 xev.requestor = xsre->requestor;
1102 xev.selection = xsre->selection;
1103 xev.target = xsre->target;
1104 xev.time = xsre->time;
1105 if (xsre->property == None)
1106 xsre->property = xsre->target;
1107
1108 /* reject */
1109 xev.property = None;
1110
1111 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
1112 if(xsre->target == xa_targets) {
1113 /* respond with the supported type */
1114 string = sel.xtarget;
1115 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1116 XA_ATOM, 32, PropModeReplace,
1117 (uchar *) &string, 1);
1118 xev.property = xsre->property;
1119 } else if(xsre->target == sel.xtarget || xsre->target == XA_STRING) {
1120 /*
1121 * xith XA_STRING non ascii characters may be incorrect in the
1122 * requestor. It is not our problem, use utf8.
1123 */
1124 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1125 if(xsre->selection == XA_PRIMARY) {
1126 seltext = sel.primary;
1127 } else if(xsre->selection == clipboard) {
1128 seltext = sel.clipboard;
1129 } else {
1130 fprintf(stderr,
1131 "Unhandled clipboard selection 0x%lx\n",
1132 xsre->selection);
1133 return;
1134 }
1135 if(seltext != NULL) {
1136 XChangeProperty(xsre->display, xsre->requestor,
1137 xsre->property, xsre->target,
1138 8, PropModeReplace,
1139 (uchar *)seltext, strlen(seltext));
1140 xev.property = xsre->property;
1141 }
1142 }
1143
1144 /* all done, send a notification to the listener */
1145 if(!XSendEvent(xsre->display, xsre->requestor, 1, 0, (XEvent *) &xev))
1146 fprintf(stderr, "Error sending SelectionNotify event\n");
1147 }
1148
1149 void
1150 xsetsel(char *str, Time t) {
1151 free(sel.primary);
1152 sel.primary = str;
1153
1154 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, t);
1155 if (XGetSelectionOwner(xw.dpy, XA_PRIMARY) != xw.win)
1156 selclear(0);
1157 }
1158
1159 void
1160 brelease(XEvent *e) {
1161 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1162 mousereport(e);
1163 return;
1164 }
1165
1166 if(e->xbutton.button == Button2) {
1167 selpaste(NULL);
1168 } else if(e->xbutton.button == Button1) {
1169 if(sel.mode == SEL_READY) {
1170 getbuttoninfo(e);
1171 selcopy(e->xbutton.time);
1172 } else
1173 selclear(NULL);
1174 sel.mode = SEL_IDLE;
1175 tsetdirt(sel.nb.y, sel.ne.y);
1176 }
1177 }
1178
1179 void
1180 bmotion(XEvent *e) {
1181 int oldey, oldex, oldsby, oldsey;
1182
1183 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1184 mousereport(e);
1185 return;
1186 }
1187
1188 if(!sel.mode)
1189 return;
1190
1191 sel.mode = SEL_READY;
1192 oldey = sel.oe.y;
1193 oldex = sel.oe.x;
1194 oldsby = sel.nb.y;
1195 oldsey = sel.ne.y;
1196 getbuttoninfo(e);
1197
1198 if(oldey != sel.oe.y || oldex != sel.oe.x)
1199 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
1200 }
1201
1202 void
1203 die(const char *errstr, ...) {
1204 va_list ap;
1205
1206 va_start(ap, errstr);
1207 vfprintf(stderr, errstr, ap);
1208 va_end(ap);
1209 exit(1);
1210 }
1211
1212 void
1213 execsh(void) {
1214 char **args, *sh, *prog;
1215 const struct passwd *pw;
1216 char buf[sizeof(long) * 8 + 1];
1217
1218 errno = 0;
1219 if((pw = getpwuid(getuid())) == NULL) {
1220 if(errno)
1221 die("getpwuid:%s\n", strerror(errno));
1222 else
1223 die("who are you?\n");
1224 }
1225
1226 if (!(sh = getenv("SHELL"))) {
1227 sh = (pw->pw_shell[0]) ? pw->pw_shell : shell;
1228 }
1229
1230 if(opt_cmd)
1231 prog = opt_cmd[0];
1232 else if(utmp)
1233 prog = utmp;
1234 else
1235 prog = sh;
1236 args = (opt_cmd) ? opt_cmd : (char *[]) {prog, NULL};
1237
1238 snprintf(buf, sizeof(buf), "%lu", xw.win);
1239
1240 unsetenv("COLUMNS");
1241 unsetenv("LINES");
1242 unsetenv("TERMCAP");
1243 setenv("LOGNAME", pw->pw_name, 1);
1244 setenv("USER", pw->pw_name, 1);
1245 setenv("SHELL", sh, 1);
1246 setenv("HOME", pw->pw_dir, 1);
1247 setenv("TERM", termname, 1);
1248 setenv("WINDOWID", buf, 1);
1249
1250 signal(SIGCHLD, SIG_DFL);
1251 signal(SIGHUP, SIG_DFL);
1252 signal(SIGINT, SIG_DFL);
1253 signal(SIGQUIT, SIG_DFL);
1254 signal(SIGTERM, SIG_DFL);
1255 signal(SIGALRM, SIG_DFL);
1256
1257 execvp(prog, args);
1258 _exit(1);
1259 }
1260
1261 void
1262 sigchld(int a) {
1263 int stat;
1264 pid_t p;
1265
1266 if((p = waitpid(pid, &stat, WNOHANG)) < 0)
1267 die("Waiting for pid %hd failed: %s\n", pid, strerror(errno));
1268
1269 if(pid != p)
1270 return;
1271
1272 if (!WIFEXITED(stat) || WEXITSTATUS(stat))
1273 die("child finished with error '%d'\n", stat);
1274 exit(0);
1275 }
1276
1277
1278 void
1279 stty(void)
1280 {
1281 char cmd[_POSIX_ARG_MAX], **p, *q, *s;
1282 size_t n, siz;
1283
1284 if((n = strlen(stty_args)) > sizeof(cmd)-1)
1285 die("incorrect stty parameters\n");
1286 memcpy(cmd, stty_args, n);
1287 q = cmd + n;
1288 siz = sizeof(cmd) - n;
1289 for(p = opt_cmd; p && (s = *p); ++p) {
1290 if((n = strlen(s)) > siz-1)
1291 die("stty parameter length too long\n");
1292 *q++ = ' ';
1293 q = memcpy(q, s, n);
1294 q += n;
1295 siz-= n + 1;
1296 }
1297 *q = '\0';
1298 if (system(cmd) != 0)
1299 perror("Couldn't call stty");
1300 }
1301
1302 void
1303 ttynew(void) {
1304 int m, s;
1305 struct winsize w = {term.row, term.col, 0, 0};
1306
1307 if(opt_io) {
1308 term.mode |= MODE_PRINT;
1309 iofd = (!strcmp(opt_io, "-")) ?
1310 1 : open(opt_io, O_WRONLY | O_CREAT, 0666);
1311 if(iofd < 0) {
1312 fprintf(stderr, "Error opening %s:%s\n",
1313 opt_io, strerror(errno));
1314 }
1315 }
1316
1317 if (opt_line) {
1318 if((cmdfd = open(opt_line, O_RDWR)) < 0)
1319 die("open line failed: %s\n", strerror(errno));
1320 close(0);
1321 dup(cmdfd);
1322 stty();
1323 return;
1324 }
1325
1326 /* seems to work fine on linux, openbsd and freebsd */
1327 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1328 die("openpty failed: %s\n", strerror(errno));
1329
1330 switch(pid = fork()) {
1331 case -1:
1332 die("fork failed\n");
1333 break;
1334 case 0:
1335 close(iofd);
1336 setsid(); /* create a new process group */
1337 dup2(s, 0);
1338 dup2(s, 1);
1339 dup2(s, 2);
1340 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1341 die("ioctl TIOCSCTTY failed: %s\n", strerror(errno));
1342 close(s);
1343 close(m);
1344 execsh();
1345 break;
1346 default:
1347 close(s);
1348 cmdfd = m;
1349 signal(SIGCHLD, sigchld);
1350 break;
1351 }
1352 }
1353
1354 void
1355 ttyread(void) {
1356 static char buf[BUFSIZ];
1357 static int buflen = 0;
1358 char *ptr;
1359 int charsize; /* size of utf8 char in bytes */
1360 Rune unicodep;
1361 int ret;
1362
1363 /* append read bytes to unprocessed bytes */
1364 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1365 die("Couldn't read from shell: %s\n", strerror(errno));
1366
1367 /* process every complete utf8 char */
1368 buflen += ret;
1369 ptr = buf;
1370 while((charsize = utf8decode(ptr, &unicodep, buflen))) {
1371 tputc(unicodep);
1372 ptr += charsize;
1373 buflen -= charsize;
1374 }
1375
1376 /* keep any uncomplete utf8 char for the next call */
1377 memmove(buf, ptr, buflen);
1378 }
1379
1380 void
1381 ttywrite(const char *s, size_t n) {
1382 if(xwrite(cmdfd, s, n) == -1)
1383 die("write error on tty: %s\n", strerror(errno));
1384 }
1385
1386 void
1387 ttysend(char *s, size_t n) {
1388 int len;
1389 Rune u;
1390
1391 ttywrite(s, n);
1392 if(IS_SET(MODE_ECHO))
1393 while((len = utf8decode(s, &u, n)) > 0) {
1394 techo(u);
1395 n -= len;
1396 s += len;
1397 }
1398 }
1399
1400 void
1401 ttyresize(void) {
1402 struct winsize w;
1403
1404 w.ws_row = term.row;
1405 w.ws_col = term.col;
1406 w.ws_xpixel = xw.tw;
1407 w.ws_ypixel = xw.th;
1408 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1409 fprintf(stderr, "Couldn't set window size: %s\n", strerror(errno));
1410 }
1411
1412 int
1413 tattrset(int attr) {
1414 int i, j;
1415
1416 for(i = 0; i < term.row-1; i++) {
1417 for(j = 0; j < term.col-1; j++) {
1418 if(term.line[i][j].mode & attr)
1419 return 1;
1420 }
1421 }
1422
1423 return 0;
1424 }
1425
1426 void
1427 tsetdirt(int top, int bot) {
1428 int i;
1429
1430 LIMIT(top, 0, term.row-1);
1431 LIMIT(bot, 0, term.row-1);
1432
1433 for(i = top; i <= bot; i++)
1434 term.dirty[i] = 1;
1435 }
1436
1437 void
1438 tsetdirtattr(int attr) {
1439 int i, j;
1440
1441 for(i = 0; i < term.row-1; i++) {
1442 for(j = 0; j < term.col-1; j++) {
1443 if(term.line[i][j].mode & attr) {
1444 tsetdirt(i, i);
1445 break;
1446 }
1447 }
1448 }
1449 }
1450
1451 void
1452 tfulldirt(void) {
1453 tsetdirt(0, term.row-1);
1454 }
1455
1456 void
1457 tcursor(int mode) {
1458 static TCursor c[2];
1459 int alt = IS_SET(MODE_ALTSCREEN);
1460
1461 if(mode == CURSOR_SAVE) {
1462 c[alt] = term.c;
1463 } else if(mode == CURSOR_LOAD) {
1464 term.c = c[alt];
1465 tmoveto(c[alt].x, c[alt].y);
1466 }
1467 }
1468
1469 void
1470 treset(void) {
1471 uint i;
1472
1473 term.c = (TCursor){{
1474 .mode = ATTR_NULL,
1475 .fg = defaultfg,
1476 .bg = defaultbg
1477 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1478
1479 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1480 for(i = tabspaces; i < term.col; i += tabspaces)
1481 term.tabs[i] = 1;
1482 term.top = 0;
1483 term.bot = term.row - 1;
1484 term.mode = MODE_WRAP;
1485 memset(term.trantbl, CS_USA, sizeof(term.trantbl));
1486 term.charset = 0;
1487
1488 for(i = 0; i < 2; i++) {
1489 tmoveto(0, 0);
1490 tcursor(CURSOR_SAVE);
1491 tclearregion(0, 0, term.col-1, term.row-1);
1492 tswapscreen();
1493 }
1494 }
1495
1496 void
1497 tnew(int col, int row) {
1498 term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } };
1499 tresize(col, row);
1500 term.numlock = 1;
1501
1502 treset();
1503 }
1504
1505 void
1506 tswapscreen(void) {
1507 Line *tmp = term.line;
1508
1509 term.line = term.alt;
1510 term.alt = tmp;
1511 term.mode ^= MODE_ALTSCREEN;
1512 tfulldirt();
1513 }
1514
1515 void
1516 tscrolldown(int orig, int n) {
1517 int i;
1518 Line temp;
1519
1520 LIMIT(n, 0, term.bot-orig+1);
1521
1522 tsetdirt(orig, term.bot-n);
1523 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1524
1525 for(i = term.bot; i >= orig+n; i--) {
1526 temp = term.line[i];
1527 term.line[i] = term.line[i-n];
1528 term.line[i-n] = temp;
1529 }
1530
1531 selscroll(orig, n);
1532 }
1533
1534 void
1535 tscrollup(int orig, int n) {
1536 int i;
1537 Line temp;
1538
1539 LIMIT(n, 0, term.bot-orig+1);
1540
1541 tclearregion(0, orig, term.col-1, orig+n-1);
1542 tsetdirt(orig+n, term.bot);
1543
1544 for(i = orig; i <= term.bot-n; i++) {
1545 temp = term.line[i];
1546 term.line[i] = term.line[i+n];
1547 term.line[i+n] = temp;
1548 }
1549
1550 selscroll(orig, -n);
1551 }
1552
1553 void
1554 selscroll(int orig, int n) {
1555 if(sel.ob.x == -1)
1556 return;
1557
1558 if(BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
1559 if((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
1560 selclear(NULL);
1561 return;
1562 }
1563 if(sel.type == SEL_RECTANGULAR) {
1564 if(sel.ob.y < term.top)
1565 sel.ob.y = term.top;
1566 if(sel.oe.y > term.bot)
1567 sel.oe.y = term.bot;
1568 } else {
1569 if(sel.ob.y < term.top) {
1570 sel.ob.y = term.top;
1571 sel.ob.x = 0;
1572 }
1573 if(sel.oe.y > term.bot) {
1574 sel.oe.y = term.bot;
1575 sel.oe.x = term.col;
1576 }
1577 }
1578 selnormalize();
1579 }
1580 }
1581
1582 void
1583 tnewline(int first_col) {
1584 int y = term.c.y;
1585
1586 if(y == term.bot) {
1587 tscrollup(term.top, 1);
1588 } else {
1589 y++;
1590 }
1591 tmoveto(first_col ? 0 : term.c.x, y);
1592 }
1593
1594 void
1595 csiparse(void) {
1596 char *p = csiescseq.buf, *np;
1597 long int v;
1598
1599 csiescseq.narg = 0;
1600 if(*p == '?') {
1601 csiescseq.priv = 1;
1602 p++;
1603 }
1604
1605 csiescseq.buf[csiescseq.len] = '\0';
1606 while(p < csiescseq.buf+csiescseq.len) {
1607 np = NULL;
1608 v = strtol(p, &np, 10);
1609 if(np == p)
1610 v = 0;
1611 if(v == LONG_MAX || v == LONG_MIN)
1612 v = -1;
1613 csiescseq.arg[csiescseq.narg++] = v;
1614 p = np;
1615 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1616 break;
1617 p++;
1618 }
1619 csiescseq.mode[0] = *p++;
1620 csiescseq.mode[1] = (p < csiescseq.buf+csiescseq.len) ? *p : '\0';
1621 }
1622
1623 /* for absolute user moves, when decom is set */
1624 void
1625 tmoveato(int x, int y) {
1626 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1627 }
1628
1629 void
1630 tmoveto(int x, int y) {
1631 int miny, maxy;
1632
1633 if(term.c.state & CURSOR_ORIGIN) {
1634 miny = term.top;
1635 maxy = term.bot;
1636 } else {
1637 miny = 0;
1638 maxy = term.row - 1;
1639 }
1640 term.c.state &= ~CURSOR_WRAPNEXT;
1641 term.c.x = LIMIT(x, 0, term.col-1);
1642 term.c.y = LIMIT(y, miny, maxy);
1643 }
1644
1645 void
1646 tsetchar(Rune u, Glyph *attr, int x, int y) {
1647 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1648 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1649 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1650 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1651 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1652 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1653 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1654 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1655 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1656 };
1657
1658 /*
1659 * The table is proudly stolen from rxvt.
1660 */
1661 if(term.trantbl[term.charset] == CS_GRAPHIC0 &&
1662 BETWEEN(u, 0x41, 0x7e) && vt100_0[u - 0x41])
1663 utf8decode(vt100_0[u - 0x41], &u, UTF_SIZ);
1664
1665 if(term.line[y][x].mode & ATTR_WIDE) {
1666 if(x+1 < term.col) {
1667 term.line[y][x+1].u = ' ';
1668 term.line[y][x+1].mode &= ~ATTR_WDUMMY;
1669 }
1670 } else if(term.line[y][x].mode & ATTR_WDUMMY) {
1671 term.line[y][x-1].u = ' ';
1672 term.line[y][x-1].mode &= ~ATTR_WIDE;
1673 }
1674
1675 term.dirty[y] = 1;
1676 term.line[y][x] = *attr;
1677 term.line[y][x].u = u;
1678 }
1679
1680 void
1681 tclearregion(int x1, int y1, int x2, int y2) {
1682 int x, y, temp;
1683 Glyph *gp;
1684
1685 if(x1 > x2)
1686 temp = x1, x1 = x2, x2 = temp;
1687 if(y1 > y2)
1688 temp = y1, y1 = y2, y2 = temp;
1689
1690 LIMIT(x1, 0, term.col-1);
1691 LIMIT(x2, 0, term.col-1);
1692 LIMIT(y1, 0, term.row-1);
1693 LIMIT(y2, 0, term.row-1);
1694
1695 for(y = y1; y <= y2; y++) {
1696 term.dirty[y] = 1;
1697 for(x = x1; x <= x2; x++) {
1698 gp = &term.line[y][x];
1699 if(selected(x, y))
1700 selclear(NULL);
1701 gp->fg = term.c.attr.fg;
1702 gp->bg = term.c.attr.bg;
1703 gp->mode = 0;
1704 gp->u = ' ';
1705 }
1706 }
1707 }
1708
1709 void
1710 tdeletechar(int n) {
1711 int dst, src, size;
1712 Glyph *line;
1713
1714 LIMIT(n, 0, term.col - term.c.x);
1715
1716 dst = term.c.x;
1717 src = term.c.x + n;
1718 size = term.col - src;
1719 line = term.line[term.c.y];
1720
1721 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1722 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1723 }
1724
1725 void
1726 tinsertblank(int n) {
1727 int dst, src, size;
1728 Glyph *line;
1729
1730 LIMIT(n, 0, term.col - term.c.x);
1731
1732 dst = term.c.x + n;
1733 src = term.c.x;
1734 size = term.col - dst;
1735 line = term.line[term.c.y];
1736
1737 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1738 tclearregion(src, term.c.y, dst - 1, term.c.y);
1739 }
1740
1741 void
1742 tinsertblankline(int n) {
1743 if(BETWEEN(term.c.y, term.top, term.bot))
1744 tscrolldown(term.c.y, n);
1745 }
1746
1747 void
1748 tdeleteline(int n) {
1749 if(BETWEEN(term.c.y, term.top, term.bot))
1750 tscrollup(term.c.y, n);
1751 }
1752
1753 int32_t
1754 tdefcolor(int *attr, int *npar, int l) {
1755 int32_t idx = -1;
1756 uint r, g, b;
1757
1758 switch (attr[*npar + 1]) {
1759 case 2: /* direct color in RGB space */
1760 if (*npar + 4 >= l) {
1761 fprintf(stderr,
1762 "erresc(38): Incorrect number of parameters (%d)\n",
1763 *npar);
1764 break;
1765 }
1766 r = attr[*npar + 2];
1767 g = attr[*npar + 3];
1768 b = attr[*npar + 4];
1769 *npar += 4;
1770 if(!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
1771 fprintf(stderr, "erresc: bad rgb color (%u,%u,%u)\n",
1772 r, g, b);
1773 else
1774 idx = TRUECOLOR(r, g, b);
1775 break;
1776 case 5: /* indexed color */
1777 if (*npar + 2 >= l) {
1778 fprintf(stderr,
1779 "erresc(38): Incorrect number of parameters (%d)\n",
1780 *npar);
1781 break;
1782 }
1783 *npar += 2;
1784 if(!BETWEEN(attr[*npar], 0, 255))
1785 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
1786 else
1787 idx = attr[*npar];
1788 break;
1789 case 0: /* implemented defined (only foreground) */
1790 case 1: /* transparent */
1791 case 3: /* direct color in CMY space */
1792 case 4: /* direct color in CMYK space */
1793 default:
1794 fprintf(stderr,
1795 "erresc(38): gfx attr %d unknown\n", attr[*npar]);
1796 break;
1797 }
1798
1799 return idx;
1800 }
1801
1802 void
1803 tsetattr(int *attr, int l) {
1804 int i;
1805 int32_t idx;
1806
1807 for(i = 0; i < l; i++) {
1808 switch(attr[i]) {
1809 case 0:
1810 term.c.attr.mode &= ~(
1811 ATTR_BOLD |
1812 ATTR_FAINT |
1813 ATTR_ITALIC |
1814 ATTR_UNDERLINE |
1815 ATTR_BLINK |
1816 ATTR_REVERSE |
1817 ATTR_INVISIBLE |
1818 ATTR_STRUCK );
1819 term.c.attr.fg = defaultfg;
1820 term.c.attr.bg = defaultbg;
1821 break;
1822 case 1:
1823 term.c.attr.mode |= ATTR_BOLD;
1824 break;
1825 case 2:
1826 term.c.attr.mode |= ATTR_FAINT;
1827 break;
1828 case 3:
1829 term.c.attr.mode |= ATTR_ITALIC;
1830 break;
1831 case 4:
1832 term.c.attr.mode |= ATTR_UNDERLINE;
1833 break;
1834 case 5: /* slow blink */
1835 /* FALLTHROUGH */
1836 case 6: /* rapid blink */
1837 term.c.attr.mode |= ATTR_BLINK;
1838 break;
1839 case 7:
1840 term.c.attr.mode |= ATTR_REVERSE;
1841 break;
1842 case 8:
1843 term.c.attr.mode |= ATTR_INVISIBLE;
1844 break;
1845 case 9:
1846 term.c.attr.mode |= ATTR_STRUCK;
1847 break;
1848 case 22:
1849 term.c.attr.mode &= ~(ATTR_BOLD | ATTR_FAINT);
1850 break;
1851 case 23:
1852 term.c.attr.mode &= ~ATTR_ITALIC;
1853 break;
1854 case 24:
1855 term.c.attr.mode &= ~ATTR_UNDERLINE;
1856 break;
1857 case 25:
1858 term.c.attr.mode &= ~ATTR_BLINK;
1859 break;
1860 case 27:
1861 term.c.attr.mode &= ~ATTR_REVERSE;
1862 break;
1863 case 28:
1864 term.c.attr.mode &= ~ATTR_INVISIBLE;
1865 break;
1866 case 29:
1867 term.c.attr.mode &= ~ATTR_STRUCK;
1868 break;
1869 case 38:
1870 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1871 term.c.attr.fg = idx;
1872 break;
1873 case 39:
1874 term.c.attr.fg = defaultfg;
1875 break;
1876 case 48:
1877 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1878 term.c.attr.bg = idx;
1879 break;
1880 case 49:
1881 term.c.attr.bg = defaultbg;
1882 break;
1883 default:
1884 if(BETWEEN(attr[i], 30, 37)) {
1885 term.c.attr.fg = attr[i] - 30;
1886 } else if(BETWEEN(attr[i], 40, 47)) {
1887 term.c.attr.bg = attr[i] - 40;
1888 } else if(BETWEEN(attr[i], 90, 97)) {
1889 term.c.attr.fg = attr[i] - 90 + 8;
1890 } else if(BETWEEN(attr[i], 100, 107)) {
1891 term.c.attr.bg = attr[i] - 100 + 8;
1892 } else {
1893 fprintf(stderr,
1894 "erresc(default): gfx attr %d unknown\n",
1895 attr[i]), csidump();
1896 }
1897 break;
1898 }
1899 }
1900 }
1901
1902 void
1903 tsetscroll(int t, int b) {
1904 int temp;
1905
1906 LIMIT(t, 0, term.row-1);
1907 LIMIT(b, 0, term.row-1);
1908 if(t > b) {
1909 temp = t;
1910 t = b;
1911 b = temp;
1912 }
1913 term.top = t;
1914 term.bot = b;
1915 }
1916
1917 void
1918 tsetmode(int priv, int set, int *args, int narg) {
1919 int *lim, mode;
1920 int alt;
1921
1922 for(lim = args + narg; args < lim; ++args) {
1923 if(priv) {
1924 switch(*args) {
1925 case 1: /* DECCKM -- Cursor key */
1926 MODBIT(term.mode, set, MODE_APPCURSOR);
1927 break;
1928 case 5: /* DECSCNM -- Reverse video */
1929 mode = term.mode;
1930 MODBIT(term.mode, set, MODE_REVERSE);
1931 if(mode != term.mode)
1932 redraw();
1933 break;
1934 case 6: /* DECOM -- Origin */
1935 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1936 tmoveato(0, 0);
1937 break;
1938 case 7: /* DECAWM -- Auto wrap */
1939 MODBIT(term.mode, set, MODE_WRAP);
1940 break;
1941 case 0: /* Error (IGNORED) */
1942 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1943 case 3: /* DECCOLM -- Column (IGNORED) */
1944 case 4: /* DECSCLM -- Scroll (IGNORED) */
1945 case 8: /* DECARM -- Auto repeat (IGNORED) */
1946 case 18: /* DECPFF -- Printer feed (IGNORED) */
1947 case 19: /* DECPEX -- Printer extent (IGNORED) */
1948 case 42: /* DECNRCM -- National characters (IGNORED) */
1949 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1950 break;
1951 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1952 MODBIT(term.mode, !set, MODE_HIDE);
1953 break;
1954 case 9: /* X10 mouse compatibility mode */
1955 xsetpointermotion(0);
1956 MODBIT(term.mode, 0, MODE_MOUSE);
1957 MODBIT(term.mode, set, MODE_MOUSEX10);
1958 break;
1959 case 1000: /* 1000: report button press */
1960 xsetpointermotion(0);
1961 MODBIT(term.mode, 0, MODE_MOUSE);
1962 MODBIT(term.mode, set, MODE_MOUSEBTN);
1963 break;
1964 case 1002: /* 1002: report motion on button press */
1965 xsetpointermotion(0);
1966 MODBIT(term.mode, 0, MODE_MOUSE);
1967 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1968 break;
1969 case 1003: /* 1003: enable all mouse motions */
1970 xsetpointermotion(set);
1971 MODBIT(term.mode, 0, MODE_MOUSE);
1972 MODBIT(term.mode, set, MODE_MOUSEMANY);
1973 break;
1974 case 1004: /* 1004: send focus events to tty */
1975 MODBIT(term.mode, set, MODE_FOCUS);
1976 break;
1977 case 1006: /* 1006: extended reporting mode */
1978 MODBIT(term.mode, set, MODE_MOUSESGR);
1979 break;
1980 case 1034:
1981 MODBIT(term.mode, set, MODE_8BIT);
1982 break;
1983 case 1049: /* swap screen & set/restore cursor as xterm */
1984 if (!allowaltscreen)
1985 break;
1986 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1987 /* FALLTHROUGH */
1988 case 47: /* swap screen */
1989 case 1047:
1990 if (!allowaltscreen)
1991 break;
1992 alt = IS_SET(MODE_ALTSCREEN);
1993 if(alt) {
1994 tclearregion(0, 0, term.col-1,
1995 term.row-1);
1996 }
1997 if(set ^ alt) /* set is always 1 or 0 */
1998 tswapscreen();
1999 if(*args != 1049)
2000 break;
2001 /* FALLTHROUGH */
2002 case 1048:
2003 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
2004 break;
2005 case 2004: /* 2004: bracketed paste mode */
2006 MODBIT(term.mode, set, MODE_BRCKTPASTE);
2007 break;
2008 /* Not implemented mouse modes. See comments there. */
2009 case 1001: /* mouse highlight mode; can hang the
2010 terminal by design when implemented. */
2011 case 1005: /* UTF-8 mouse mode; will confuse
2012 applications not supporting UTF-8
2013 and luit. */
2014 case 1015: /* urxvt mangled mouse mode; incompatible
2015 and can be mistaken for other control
2016 codes. */
2017 default:
2018 fprintf(stderr,
2019 "erresc: unknown private set/reset mode %d\n",
2020 *args);
2021 break;
2022 }
2023 } else {
2024 switch(*args) {
2025 case 0: /* Error (IGNORED) */
2026 break;
2027 case 2: /* KAM -- keyboard action */
2028 MODBIT(term.mode, set, MODE_KBDLOCK);
2029 break;
2030 case 4: /* IRM -- Insertion-replacement */
2031 MODBIT(term.mode, set, MODE_INSERT);
2032 break;
2033 case 12: /* SRM -- Send/Receive */
2034 MODBIT(term.mode, !set, MODE_ECHO);
2035 break;
2036 case 20: /* LNM -- Linefeed/new line */
2037 MODBIT(term.mode, set, MODE_CRLF);
2038 break;
2039 default:
2040 fprintf(stderr,
2041 "erresc: unknown set/reset mode %d\n",
2042 *args);
2043 break;
2044 }
2045 }
2046 }
2047 }
2048
2049 void
2050 csihandle(void) {
2051 char buf[40];
2052 int len;
2053
2054 switch(csiescseq.mode[0]) {
2055 default:
2056 unknown:
2057 fprintf(stderr, "erresc: unknown csi ");
2058 csidump();
2059 /* die(""); */
2060 break;
2061 case '@': /* ICH -- Insert <n> blank char */
2062 DEFAULT(csiescseq.arg[0], 1);
2063 tinsertblank(csiescseq.arg[0]);
2064 break;
2065 case 'A': /* CUU -- Cursor <n> Up */
2066 DEFAULT(csiescseq.arg[0], 1);
2067 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
2068 break;
2069 case 'B': /* CUD -- Cursor <n> Down */
2070 case 'e': /* VPR --Cursor <n> Down */
2071 DEFAULT(csiescseq.arg[0], 1);
2072 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
2073 break;
2074 case 'i': /* MC -- Media Copy */
2075 switch(csiescseq.arg[0]) {
2076 case 0:
2077 tdump();
2078 break;
2079 case 1:
2080 tdumpline(term.c.y);
2081 break;
2082 case 2:
2083 tdumpsel();
2084 break;
2085 case 4:
2086 term.mode &= ~MODE_PRINT;
2087 break;
2088 case 5:
2089 term.mode |= MODE_PRINT;
2090 break;
2091 }
2092 break;
2093 case 'c': /* DA -- Device Attributes */
2094 if(csiescseq.arg[0] == 0)
2095 ttywrite(vtiden, sizeof(vtiden) - 1);
2096 break;
2097 case 'C': /* CUF -- Cursor <n> Forward */
2098 case 'a': /* HPR -- Cursor <n> Forward */
2099 DEFAULT(csiescseq.arg[0], 1);
2100 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
2101 break;
2102 case 'D': /* CUB -- Cursor <n> Backward */
2103 DEFAULT(csiescseq.arg[0], 1);
2104 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
2105 break;
2106 case 'E': /* CNL -- Cursor <n> Down and first col */
2107 DEFAULT(csiescseq.arg[0], 1);
2108 tmoveto(0, term.c.y+csiescseq.arg[0]);
2109 break;
2110 case 'F': /* CPL -- Cursor <n> Up and first col */
2111 DEFAULT(csiescseq.arg[0], 1);
2112 tmoveto(0, term.c.y-csiescseq.arg[0]);
2113 break;
2114 case 'g': /* TBC -- Tabulation clear */
2115 switch(csiescseq.arg[0]) {
2116 case 0: /* clear current tab stop */
2117 term.tabs[term.c.x] = 0;
2118 break;
2119 case 3: /* clear all the tabs */
2120 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
2121 break;
2122 default:
2123 goto unknown;
2124 }
2125 break;
2126 case 'G': /* CHA -- Move to <col> */
2127 case '`': /* HPA */
2128 DEFAULT(csiescseq.arg[0], 1);
2129 tmoveto(csiescseq.arg[0]-1, term.c.y);
2130 break;
2131 case 'H': /* CUP -- Move to <row> <col> */
2132 case 'f': /* HVP */
2133 DEFAULT(csiescseq.arg[0], 1);
2134 DEFAULT(csiescseq.arg[1], 1);
2135 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
2136 break;
2137 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
2138 DEFAULT(csiescseq.arg[0], 1);
2139 tputtab(csiescseq.arg[0]);
2140 break;
2141 case 'J': /* ED -- Clear screen */
2142 selclear(NULL);
2143 switch(csiescseq.arg[0]) {
2144 case 0: /* below */
2145 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
2146 if(term.c.y < term.row-1) {
2147 tclearregion(0, term.c.y+1, term.col-1,
2148 term.row-1);
2149 }
2150 break;
2151 case 1: /* above */
2152 if(term.c.y > 1)
2153 tclearregion(0, 0, term.col-1, term.c.y-1);
2154 tclearregion(0, term.c.y, term.c.x, term.c.y);
2155 break;
2156 case 2: /* all */
2157 tclearregion(0, 0, term.col-1, term.row-1);
2158 break;
2159 default:
2160 goto unknown;
2161 }
2162 break;
2163 case 'K': /* EL -- Clear line */
2164 switch(csiescseq.arg[0]) {
2165 case 0: /* right */
2166 tclearregion(term.c.x, term.c.y, term.col-1,
2167 term.c.y);
2168 break;
2169 case 1: /* left */
2170 tclearregion(0, term.c.y, term.c.x, term.c.y);
2171 break;
2172 case 2: /* all */
2173 tclearregion(0, term.c.y, term.col-1, term.c.y);
2174 break;
2175 }
2176 break;
2177 case 'S': /* SU -- Scroll <n> line up */
2178 DEFAULT(csiescseq.arg[0], 1);
2179 tscrollup(term.top, csiescseq.arg[0]);
2180 break;
2181 case 'T': /* SD -- Scroll <n> line down */
2182 DEFAULT(csiescseq.arg[0], 1);
2183 tscrolldown(term.top, csiescseq.arg[0]);
2184 break;
2185 case 'L': /* IL -- Insert <n> blank lines */
2186 DEFAULT(csiescseq.arg[0], 1);
2187 tinsertblankline(csiescseq.arg[0]);
2188 break;
2189 case 'l': /* RM -- Reset Mode */
2190 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
2191 break;
2192 case 'M': /* DL -- Delete <n> lines */
2193 DEFAULT(csiescseq.arg[0], 1);
2194 tdeleteline(csiescseq.arg[0]);
2195 break;
2196 case 'X': /* ECH -- Erase <n> char */
2197 DEFAULT(csiescseq.arg[0], 1);
2198 tclearregion(term.c.x, term.c.y,
2199 term.c.x + csiescseq.arg[0] - 1, term.c.y);
2200 break;
2201 case 'P': /* DCH -- Delete <n> char */
2202 DEFAULT(csiescseq.arg[0], 1);
2203 tdeletechar(csiescseq.arg[0]);
2204 break;
2205 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
2206 DEFAULT(csiescseq.arg[0], 1);
2207 tputtab(-csiescseq.arg[0]);
2208 break;
2209 case 'd': /* VPA -- Move to <row> */
2210 DEFAULT(csiescseq.arg[0], 1);
2211 tmoveato(term.c.x, csiescseq.arg[0]-1);
2212 break;
2213 case 'h': /* SM -- Set terminal mode */
2214 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
2215 break;
2216 case 'm': /* SGR -- Terminal attribute (color) */
2217 tsetattr(csiescseq.arg, csiescseq.narg);
2218 break;
2219 case 'n': /* DSR – Device Status Report (cursor position) */
2220 if (csiescseq.arg[0] == 6) {
2221 len = snprintf(buf, sizeof(buf),"\033[%i;%iR",
2222 term.c.y+1, term.c.x+1);
2223 ttywrite(buf, len);
2224 }
2225 break;
2226 case 'r': /* DECSTBM -- Set Scrolling Region */
2227 if(csiescseq.priv) {
2228 goto unknown;
2229 } else {
2230 DEFAULT(csiescseq.arg[0], 1);
2231 DEFAULT(csiescseq.arg[1], term.row);
2232 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
2233 tmoveato(0, 0);
2234 }
2235 break;
2236 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
2237 tcursor(CURSOR_SAVE);
2238 break;
2239 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
2240 tcursor(CURSOR_LOAD);
2241 break;
2242 case ' ':
2243 switch (csiescseq.mode[1]) {
2244 case 'q': /* DECSCUSR -- Set Cursor Style */
2245 DEFAULT(csiescseq.arg[0], 1);
2246 if (!BETWEEN(csiescseq.arg[0], 0, 6)) {
2247 goto unknown;
2248 }
2249 xw.cursor = csiescseq.arg[0];
2250 break;
2251 default:
2252 goto unknown;
2253 }
2254 break;
2255 }
2256 }
2257
2258 void
2259 csidump(void) {
2260 int i;
2261 uint c;
2262
2263 printf("ESC[");
2264 for(i = 0; i < csiescseq.len; i++) {
2265 c = csiescseq.buf[i] & 0xff;
2266 if(isprint(c)) {
2267 putchar(c);
2268 } else if(c == '\n') {
2269 printf("(\\n)");
2270 } else if(c == '\r') {
2271 printf("(\\r)");
2272 } else if(c == 0x1b) {
2273 printf("(\\e)");
2274 } else {
2275 printf("(%02x)", c);
2276 }
2277 }
2278 putchar('\n');
2279 }
2280
2281 void
2282 csireset(void) {
2283 memset(&csiescseq, 0, sizeof(csiescseq));
2284 }
2285
2286 void
2287 strhandle(void) {
2288 char *p = NULL;
2289 int j, narg, par;
2290
2291 term.esc &= ~(ESC_STR_END|ESC_STR);
2292 strparse();
2293 par = (narg = strescseq.narg) ? atoi(strescseq.args[0]) : 0;
2294
2295 switch(strescseq.type) {
2296 case ']': /* OSC -- Operating System Command */
2297 switch(par) {
2298 case 0:
2299 case 1:
2300 case 2:
2301 if(narg > 1)
2302 xsettitle(strescseq.args[1]);
2303 return;
2304 case 4: /* color set */
2305 if(narg < 3)
2306 break;
2307 p = strescseq.args[2];
2308 /* FALLTHROUGH */
2309 case 104: /* color reset, here p = NULL */
2310 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2311 if(xsetcolorname(j, p)) {
2312 fprintf(stderr, "erresc: invalid color %s\n", p);
2313 } else {
2314 /*
2315 * TODO if defaultbg color is changed, borders
2316 * are dirty
2317 */
2318 redraw();
2319 }
2320 return;
2321 }
2322 break;
2323 case 'k': /* old title set compatibility */
2324 xsettitle(strescseq.args[0]);
2325 return;
2326 case 'P': /* DCS -- Device Control String */
2327 case '_': /* APC -- Application Program Command */
2328 case '^': /* PM -- Privacy Message */
2329 return;
2330 }
2331
2332 fprintf(stderr, "erresc: unknown str ");
2333 strdump();
2334 }
2335
2336 void
2337 strparse(void) {
2338 int c;
2339 char *p = strescseq.buf;
2340
2341 strescseq.narg = 0;
2342 strescseq.buf[strescseq.len] = '\0';
2343
2344 if(*p == '\0')
2345 return;
2346
2347 while(strescseq.narg < STR_ARG_SIZ) {
2348 strescseq.args[strescseq.narg++] = p;
2349 while((c = *p) != ';' && c != '\0')
2350 ++p;
2351 if(c == '\0')
2352 return;
2353 *p++ = '\0';
2354 }
2355 }
2356
2357 void
2358 strdump(void) {
2359 int i;
2360 uint c;
2361
2362 printf("ESC%c", strescseq.type);
2363 for(i = 0; i < strescseq.len; i++) {
2364 c = strescseq.buf[i] & 0xff;
2365 if(c == '\0') {
2366 return;
2367 } else if(isprint(c)) {
2368 putchar(c);
2369 } else if(c == '\n') {
2370 printf("(\\n)");
2371 } else if(c == '\r') {
2372 printf("(\\r)");
2373 } else if(c == 0x1b) {
2374 printf("(\\e)");
2375 } else {
2376 printf("(%02x)", c);
2377 }
2378 }
2379 printf("ESC\\\n");
2380 }
2381
2382 void
2383 strreset(void) {
2384 memset(&strescseq, 0, sizeof(strescseq));
2385 }
2386
2387 void
2388 tprinter(char *s, size_t len) {
2389 if(iofd != -1 && xwrite(iofd, s, len) < 0) {
2390 fprintf(stderr, "Error writing in %s:%s\n",
2391 opt_io, strerror(errno));
2392 close(iofd);
2393 iofd = -1;
2394 }
2395 }
2396
2397 void
2398 toggleprinter(const Arg *arg) {
2399 term.mode ^= MODE_PRINT;
2400 }
2401
2402 void
2403 printscreen(const Arg *arg) {
2404 tdump();
2405 }
2406
2407 void
2408 printsel(const Arg *arg) {
2409 tdumpsel();
2410 }
2411
2412 void
2413 tdumpsel(void) {
2414 char *ptr;
2415
2416 if((ptr = getsel())) {
2417 tprinter(ptr, strlen(ptr));
2418 free(ptr);
2419 }
2420 }
2421
2422 void
2423 tdumpline(int n) {
2424 char buf[UTF_SIZ];
2425 Glyph *bp, *end;
2426
2427 bp = &term.line[n][0];
2428 end = &bp[MIN(tlinelen(n), term.col) - 1];
2429 if(bp != end || bp->u != ' ') {
2430 for( ;bp <= end; ++bp)
2431 tprinter(buf, utf8encode(bp->u, buf));
2432 }
2433 tprinter("\n", 1);
2434 }
2435
2436 void
2437 tdump(void) {
2438 int i;
2439
2440 for(i = 0; i < term.row; ++i)
2441 tdumpline(i);
2442 }
2443
2444 void
2445 tputtab(int n) {
2446 uint x = term.c.x;
2447
2448 if(n > 0) {
2449 while(x < term.col && n--)
2450 for(++x; x < term.col && !term.tabs[x]; ++x)
2451 /* nothing */ ;
2452 } else if(n < 0) {
2453 while(x > 0 && n++)
2454 for(--x; x > 0 && !term.tabs[x]; --x)
2455 /* nothing */ ;
2456 }
2457 term.c.x = LIMIT(x, 0, term.col-1);
2458 }
2459
2460 void
2461 techo(Rune u) {
2462 if(ISCONTROL(u)) { /* control code */
2463 if(u & 0x80) {
2464 u &= 0x7f;
2465 tputc('^');
2466 tputc('[');
2467 } else if(u != '\n' && u != '\r' && u != '\t') {
2468 u ^= 0x40;
2469 tputc('^');
2470 }
2471 }
2472 tputc(u);
2473 }
2474
2475 void
2476 tdeftran(char ascii) {
2477 static char cs[] = "0B";
2478 static int vcs[] = {CS_GRAPHIC0, CS_USA};
2479 char *p;
2480
2481 if((p = strchr(cs, ascii)) == NULL) {
2482 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2483 } else {
2484 term.trantbl[term.icharset] = vcs[p - cs];
2485 }
2486 }
2487
2488 void
2489 tdectest(char c) {
2490 int x, y;
2491
2492 if(c == '8') { /* DEC screen alignment test. */
2493 for(x = 0; x < term.col; ++x) {
2494 for(y = 0; y < term.row; ++y)
2495 tsetchar('E', &term.c.attr, x, y);
2496 }
2497 }
2498 }
2499
2500 void
2501 tstrsequence(uchar c) {
2502 switch (c) {
2503 case 0x90: /* DCS -- Device Control String */
2504 c = 'P';
2505 break;
2506 case 0x9f: /* APC -- Application Program Command */
2507 c = '_';
2508 break;
2509 case 0x9e: /* PM -- Privacy Message */
2510 c = '^';
2511 break;
2512 case 0x9d: /* OSC -- Operating System Command */
2513 c = ']';
2514 break;
2515 }
2516 strreset();
2517 strescseq.type = c;
2518 term.esc |= ESC_STR;
2519 }
2520
2521 void
2522 tcontrolcode(uchar ascii) {
2523 switch(ascii) {
2524 case '\t': /* HT */
2525 tputtab(1);
2526 return;
2527 case '\b': /* BS */
2528 tmoveto(term.c.x-1, term.c.y);
2529 return;
2530 case '\r': /* CR */
2531 tmoveto(0, term.c.y);
2532 return;
2533 case '\f': /* LF */
2534 case '\v': /* VT */
2535 case '\n': /* LF */
2536 /* go to first col if the mode is set */
2537 tnewline(IS_SET(MODE_CRLF));
2538 return;
2539 case '\a': /* BEL */
2540 if(term.esc & ESC_STR_END) {
2541 /* backwards compatibility to xterm */
2542 strhandle();
2543 } else {
2544 if(!(xw.state & WIN_FOCUSED))
2545 xseturgency(1);
2546 if (bellvolume)
2547 XkbBell(xw.dpy, xw.win, bellvolume, (Atom)NULL);
2548 }
2549 break;
2550 case '\033': /* ESC */
2551 csireset();
2552 term.esc &= ~(ESC_CSI|ESC_ALTCHARSET|ESC_TEST);
2553 term.esc |= ESC_START;
2554 return;
2555 case '\016': /* SO (LS1 -- Locking shift 1) */
2556 case '\017': /* SI (LS0 -- Locking shift 0) */
2557 term.charset = 1 - (ascii - '\016');
2558 return;
2559 case '\032': /* SUB */
2560 tsetchar('?', &term.c.attr, term.c.x, term.c.y);
2561 case '\030': /* CAN */
2562 csireset();
2563 break;
2564 case '\005': /* ENQ (IGNORED) */
2565 case '\000': /* NUL (IGNORED) */
2566 case '\021': /* XON (IGNORED) */
2567 case '\023': /* XOFF (IGNORED) */
2568 case 0177: /* DEL (IGNORED) */
2569 return;
2570 case 0x84: /* TODO: IND */
2571 break;
2572 case 0x85: /* NEL -- Next line */
2573 tnewline(1); /* always go to first col */
2574 break;
2575 case 0x88: /* HTS -- Horizontal tab stop */
2576 term.tabs[term.c.x] = 1;
2577 break;
2578 case 0x8d: /* TODO: RI */
2579 case 0x8e: /* TODO: SS2 */
2580 case 0x8f: /* TODO: SS3 */
2581 case 0x98: /* TODO: SOS */
2582 break;
2583 case 0x9a: /* DECID -- Identify Terminal */
2584 ttywrite(vtiden, sizeof(vtiden) - 1);
2585 break;
2586 case 0x9b: /* TODO: CSI */
2587 case 0x9c: /* TODO: ST */
2588 break;
2589 case 0x90: /* DCS -- Device Control String */
2590 case 0x9f: /* APC -- Application Program Command */
2591 case 0x9e: /* PM -- Privacy Message */
2592 case 0x9d: /* OSC -- Operating System Command */
2593 tstrsequence(ascii);
2594 return;
2595 }
2596 /* only CAN, SUB, \a and C1 chars interrupt a sequence */
2597 term.esc &= ~(ESC_STR_END|ESC_STR);
2598 }
2599
2600 /*
2601 * returns 1 when the sequence is finished and it hasn't to read
2602 * more characters for this sequence, otherwise 0
2603 */
2604 int
2605 eschandle(uchar ascii) {
2606 switch(ascii) {
2607 case '[':
2608 term.esc |= ESC_CSI;
2609 return 0;
2610 case '#':
2611 term.esc |= ESC_TEST;
2612 return 0;
2613 case 'P': /* DCS -- Device Control String */
2614 case '_': /* APC -- Application Program Command */
2615 case '^': /* PM -- Privacy Message */
2616 case ']': /* OSC -- Operating System Command */
2617 case 'k': /* old title set compatibility */
2618 tstrsequence(ascii);
2619 return 0;
2620 case 'n': /* LS2 -- Locking shift 2 */
2621 case 'o': /* LS3 -- Locking shift 3 */
2622 term.charset = 2 + (ascii - 'n');
2623 break;
2624 case '(': /* GZD4 -- set primary charset G0 */
2625 case ')': /* G1D4 -- set secondary charset G1 */
2626 case '*': /* G2D4 -- set tertiary charset G2 */
2627 case '+': /* G3D4 -- set quaternary charset G3 */
2628 term.icharset = ascii - '(';
2629 term.esc |= ESC_ALTCHARSET;
2630 return 0;
2631 case 'D': /* IND -- Linefeed */
2632 if(term.c.y == term.bot) {
2633 tscrollup(term.top, 1);
2634 } else {
2635 tmoveto(term.c.x, term.c.y+1);
2636 }
2637 break;
2638 case 'E': /* NEL -- Next line */
2639 tnewline(1); /* always go to first col */
2640 break;
2641 case 'H': /* HTS -- Horizontal tab stop */
2642 term.tabs[term.c.x] = 1;
2643 break;
2644 case 'M': /* RI -- Reverse index */
2645 if(term.c.y == term.top) {
2646 tscrolldown(term.top, 1);
2647 } else {
2648 tmoveto(term.c.x, term.c.y-1);
2649 }
2650 break;
2651 case 'Z': /* DECID -- Identify Terminal */
2652 ttywrite(vtiden, sizeof(vtiden) - 1);
2653 break;
2654 case 'c': /* RIS -- Reset to inital state */
2655 treset();
2656 xresettitle();
2657 xloadcols();
2658 break;
2659 case '=': /* DECPAM -- Application keypad */
2660 term.mode |= MODE_APPKEYPAD;
2661 break;
2662 case '>': /* DECPNM -- Normal keypad */
2663 term.mode &= ~MODE_APPKEYPAD;
2664 break;
2665 case '7': /* DECSC -- Save Cursor */
2666 tcursor(CURSOR_SAVE);
2667 break;
2668 case '8': /* DECRC -- Restore Cursor */
2669 tcursor(CURSOR_LOAD);
2670 break;
2671 case '\\': /* ST -- String Terminator */
2672 if(term.esc & ESC_STR_END)
2673 strhandle();
2674 break;
2675 default:
2676 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2677 (uchar) ascii, isprint(ascii)? ascii:'.');
2678 break;
2679 }
2680 return 1;
2681 }
2682
2683 void
2684 tputc(Rune u) {
2685 char c[UTF_SIZ];
2686 int control;
2687 int width, len;
2688 Glyph *gp;
2689
2690 len = utf8encode(u, c);
2691 if((width = wcwidth(u)) == -1) {
2692 memcpy(c, "\357\277\275", 4); /* UTF_INVALID */
2693 width = 1;
2694 }
2695
2696 if(IS_SET(MODE_PRINT))
2697 tprinter(c, len);
2698 control = ISCONTROL(u);
2699
2700 /*
2701 * STR sequence must be checked before anything else
2702 * because it uses all following characters until it
2703 * receives a ESC, a SUB, a ST or any other C1 control
2704 * character.
2705 */
2706 if(term.esc & ESC_STR) {
2707 if(u == '\a' || u == 030 || u == 032 || u == 033 ||
2708 ISCONTROLC1(u)) {
2709 term.esc &= ~(ESC_START|ESC_STR);
2710 term.esc |= ESC_STR_END;
2711 } else if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2712 memmove(&strescseq.buf[strescseq.len], c, len);
2713 strescseq.len += len;
2714 return;
2715 } else {
2716 /*
2717 * Here is a bug in terminals. If the user never sends
2718 * some code to stop the str or esc command, then st
2719 * will stop responding. But this is better than
2720 * silently failing with unknown characters. At least
2721 * then users will report back.
2722 *
2723 * In the case users ever get fixed, here is the code:
2724 */
2725 /*
2726 * term.esc = 0;
2727 * strhandle();
2728 */
2729 return;
2730 }
2731 }
2732
2733 /*
2734 * Actions of control codes must be performed as soon they arrive
2735 * because they can be embedded inside a control sequence, and
2736 * they must not cause conflicts with sequences.
2737 */
2738 if(control) {
2739 tcontrolcode(u);
2740 /*
2741 * control codes are not shown ever
2742 */
2743 return;
2744 } else if(term.esc & ESC_START) {
2745 if(term.esc & ESC_CSI) {
2746 csiescseq.buf[csiescseq.len++] = u;
2747 if(BETWEEN(u, 0x40, 0x7E)
2748 || csiescseq.len >= \
2749 sizeof(csiescseq.buf)-1) {
2750 term.esc = 0;
2751 csiparse();
2752 csihandle();
2753 }
2754 return;
2755 } else if(term.esc & ESC_ALTCHARSET) {
2756 tdeftran(u);
2757 } else if(term.esc & ESC_TEST) {
2758 tdectest(u);
2759 } else {
2760 if (!eschandle(u))
2761 return;
2762 /* sequence already finished */
2763 }
2764 term.esc = 0;
2765 /*
2766 * All characters which form part of a sequence are not
2767 * printed
2768 */
2769 return;
2770 }
2771 if(sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
2772 selclear(NULL);
2773
2774 gp = &term.line[term.c.y][term.c.x];
2775 if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2776 gp->mode |= ATTR_WRAP;
2777 tnewline(1);
2778 gp = &term.line[term.c.y][term.c.x];
2779 }
2780
2781 if(IS_SET(MODE_INSERT) && term.c.x+width < term.col)
2782 memmove(gp+width, gp, (term.col - term.c.x - width) * sizeof(Glyph));
2783
2784 if(term.c.x+width > term.col) {
2785 tnewline(1);
2786 gp = &term.line[term.c.y][term.c.x];
2787 }
2788
2789 tsetchar(u, &term.c.attr, term.c.x, term.c.y);
2790
2791 if(width == 2) {
2792 gp->mode |= ATTR_WIDE;
2793 if(term.c.x+1 < term.col) {
2794 gp[1].u = '\0';
2795 gp[1].mode = ATTR_WDUMMY;
2796 }
2797 }
2798 if(term.c.x+width < term.col) {
2799 tmoveto(term.c.x+width, term.c.y);
2800 } else {
2801 term.c.state |= CURSOR_WRAPNEXT;
2802 }
2803 }
2804
2805 void
2806 tresize(int col, int row) {
2807 int i;
2808 int minrow = MIN(row, term.row);
2809 int mincol = MIN(col, term.col);
2810 int *bp;
2811 TCursor c;
2812
2813 if(col < 1 || row < 1) {
2814 fprintf(stderr,
2815 "tresize: error resizing to %dx%d\n", col, row);
2816 return;
2817 }
2818
2819 /*
2820 * slide screen to keep cursor where we expect it -
2821 * tscrollup would work here, but we can optimize to
2822 * memmove because we're freeing the earlier lines
2823 */
2824 for(i = 0; i <= term.c.y - row; i++) {
2825 free(term.line[i]);
2826 free(term.alt[i]);
2827 }
2828 /* ensure that both src and dst are not NULL */
2829 if (i > 0) {
2830 memmove(term.line, term.line + i, row * sizeof(Line));
2831 memmove(term.alt, term.alt + i, row * sizeof(Line));
2832 }
2833 for(i += row; i < term.row; i++) {
2834 free(term.line[i]);
2835 free(term.alt[i]);
2836 }
2837
2838 /* resize to new width */
2839 term.specbuf = xrealloc(term.specbuf, col * sizeof(XftGlyphFontSpec));
2840
2841 /* resize to new height */
2842 term.line = xrealloc(term.line, row * sizeof(Line));
2843 term.alt = xrealloc(term.alt, row * sizeof(Line));
2844 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2845 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2846
2847 /* resize each row to new width, zero-pad if needed */
2848 for(i = 0; i < minrow; i++) {
2849 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2850 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2851 }
2852
2853 /* allocate any new rows */
2854 for(/* i == minrow */; i < row; i++) {
2855 term.line[i] = xmalloc(col * sizeof(Glyph));
2856 term.alt[i] = xmalloc(col * sizeof(Glyph));
2857 }
2858 if(col > term.col) {
2859 bp = term.tabs + term.col;
2860
2861 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2862 while(--bp > term.tabs && !*bp)
2863 /* nothing */ ;
2864 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2865 *bp = 1;
2866 }
2867 /* update terminal size */
2868 term.col = col;
2869 term.row = row;
2870 /* reset scrolling region */
2871 tsetscroll(0, row-1);
2872 /* make use of the LIMIT in tmoveto */
2873 tmoveto(term.c.x, term.c.y);
2874 /* Clearing both screens (it makes dirty all lines) */
2875 c = term.c;
2876 for(i = 0; i < 2; i++) {
2877 if(mincol < col && 0 < minrow) {
2878 tclearregion(mincol, 0, col - 1, minrow - 1);
2879 }
2880 if(0 < col && minrow < row) {
2881 tclearregion(0, minrow, col - 1, row - 1);
2882 }
2883 tswapscreen();
2884 tcursor(CURSOR_LOAD);
2885 }
2886 term.c = c;
2887 }
2888
2889 void
2890 xresize(int col, int row) {
2891 xw.tw = MAX(1, col * xw.cw);
2892 xw.th = MAX(1, row * xw.ch);
2893
2894 XFreePixmap(xw.dpy, xw.buf);
2895 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2896 DefaultDepth(xw.dpy, xw.scr));
2897 XftDrawChange(xw.draw, xw.buf);
2898 xclear(0, 0, xw.w, xw.h);
2899 }
2900
2901 ushort
2902 sixd_to_16bit(int x) {
2903 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2904 }
2905
2906 int
2907 xloadcolor(int i, const char *name, Color *ncolor) {
2908 XRenderColor color = { .alpha = 0xffff };
2909
2910 if(!name) {
2911 if(BETWEEN(i, 16, 255)) { /* 256 color */
2912 if(i < 6*6*6+16) { /* same colors as xterm */
2913 color.red = sixd_to_16bit( ((i-16)/36)%6 );
2914 color.green = sixd_to_16bit( ((i-16)/6) %6 );
2915 color.blue = sixd_to_16bit( ((i-16)/1) %6 );
2916 } else { /* greyscale */
2917 color.red = 0x0808 + 0x0a0a * (i - (6*6*6+16));
2918 color.green = color.blue = color.red;
2919 }
2920 return XftColorAllocValue(xw.dpy, xw.vis,
2921 xw.cmap, &color, ncolor);
2922 } else
2923 name = colorname[i];
2924 }
2925 return XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, ncolor);
2926 }
2927
2928 void
2929 xloadcols(void) {
2930 int i;
2931 static int loaded;
2932 Color *cp;
2933
2934 if(loaded) {
2935 for (cp = dc.col; cp < &dc.col[LEN(dc.col)]; ++cp)
2936 XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
2937 }
2938
2939 for(i = 0; i < LEN(dc.col); i++)
2940 if(!xloadcolor(i, NULL, &dc.col[i])) {
2941 if(colorname[i])
2942 die("Could not allocate color '%s'\n", colorname[i]);
2943 else
2944 die("Could not allocate color %d\n", i);
2945 }
2946 loaded = 1;
2947 }
2948
2949 int
2950 xsetcolorname(int x, const char *name) {
2951 Color ncolor;
2952
2953 if(!BETWEEN(x, 0, LEN(dc.col)))
2954 return 1;
2955
2956
2957 if(!xloadcolor(x, name, &ncolor))
2958 return 1;
2959
2960 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2961 dc.col[x] = ncolor;
2962 return 0;
2963 }
2964
2965 void
2966 xtermclear(int col1, int row1, int col2, int row2) {
2967 XftDrawRect(xw.draw,
2968 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2969 borderpx + col1 * xw.cw,
2970 borderpx + row1 * xw.ch,
2971 (col2-col1+1) * xw.cw,
2972 (row2-row1+1) * xw.ch);
2973 }
2974
2975 /*
2976 * Absolute coordinates.
2977 */
2978 void
2979 xclear(int x1, int y1, int x2, int y2) {
2980 XftDrawRect(xw.draw,
2981 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2982 x1, y1, x2-x1, y2-y1);
2983 }
2984
2985 void
2986 xhints(void) {
2987 XClassHint class = {opt_class ? opt_class : termname, termname};
2988 XWMHints wm = {.flags = InputHint, .input = 1};
2989 XSizeHints *sizeh = NULL;
2990
2991 sizeh = XAllocSizeHints();
2992
2993 sizeh->flags = PSize | PResizeInc | PBaseSize;
2994 sizeh->height = xw.h;
2995 sizeh->width = xw.w;
2996 sizeh->height_inc = xw.ch;
2997 sizeh->width_inc = xw.cw;
2998 sizeh->base_height = 2 * borderpx;
2999 sizeh->base_width = 2 * borderpx;
3000 if(xw.isfixed) {
3001 sizeh->flags |= PMaxSize | PMinSize;
3002 sizeh->min_width = sizeh->max_width = xw.w;
3003 sizeh->min_height = sizeh->max_height = xw.h;
3004 }
3005 if(xw.gm & (XValue|YValue)) {
3006 sizeh->flags |= USPosition | PWinGravity;
3007 sizeh->x = xw.l;
3008 sizeh->y = xw.t;
3009 sizeh->win_gravity = xgeommasktogravity(xw.gm);
3010 }
3011
3012 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
3013 &class);
3014 XFree(sizeh);
3015 }
3016
3017 int
3018 xgeommasktogravity(int mask) {
3019 switch(mask & (XNegative|YNegative)) {
3020 case 0:
3021 return NorthWestGravity;
3022 case XNegative:
3023 return NorthEastGravity;
3024 case YNegative:
3025 return SouthWestGravity;
3026 }
3027 return SouthEastGravity;
3028 }
3029
3030 int
3031 xloadfont(Font *f, FcPattern *pattern) {
3032 FcPattern *match;
3033 FcResult result;
3034
3035 match = FcFontMatch(NULL, pattern, &result);
3036 if(!match)
3037 return 1;
3038
3039 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
3040 FcPatternDestroy(match);
3041 return 1;
3042 }
3043
3044 f->set = NULL;
3045 f->pattern = FcPatternDuplicate(pattern);
3046
3047 f->ascent = f->match->ascent;
3048 f->descent = f->match->descent;
3049 f->lbearing = 0;
3050 f->rbearing = f->match->max_advance_width;
3051
3052 f->height = f->ascent + f->descent;
3053 f->width = f->lbearing + f->rbearing;
3054
3055 return 0;
3056 }
3057
3058 void
3059 xloadfonts(char *fontstr, double fontsize) {
3060 FcPattern *pattern;
3061 double fontval;
3062 float ceilf(float);
3063
3064 if(fontstr[0] == '-') {
3065 pattern = XftXlfdParse(fontstr, False, False);
3066 } else {
3067 pattern = FcNameParse((FcChar8 *)fontstr);
3068 }
3069
3070 if(!pattern)
3071 die("st: can't open font %s\n", fontstr);
3072
3073 if(fontsize > 1) {
3074 FcPatternDel(pattern, FC_PIXEL_SIZE);
3075 FcPatternDel(pattern, FC_SIZE);
3076 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
3077 usedfontsize = fontsize;
3078 } else {
3079 if(FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval) ==
3080 FcResultMatch) {
3081 usedfontsize = fontval;
3082 } else if(FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval) ==
3083 FcResultMatch) {
3084 usedfontsize = -1;
3085 } else {
3086 /*
3087 * Default font size is 12, if none given. This is to
3088 * have a known usedfontsize value.
3089 */
3090 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
3091 usedfontsize = 12;
3092 }
3093 defaultfontsize = usedfontsize;
3094 }
3095
3096 FcConfigSubstitute(0, pattern, FcMatchPattern);
3097 FcDefaultSubstitute(pattern);
3098
3099 if(xloadfont(&dc.font, pattern))
3100 die("st: can't open font %s\n", fontstr);
3101
3102 if(usedfontsize < 0) {
3103 FcPatternGetDouble(dc.font.match->pattern,
3104 FC_PIXEL_SIZE, 0, &fontval);
3105 usedfontsize = fontval;
3106 if(fontsize == 0)
3107 defaultfontsize = fontval;
3108 }
3109
3110 /* Setting character width and height. */
3111 xw.cw = ceilf(dc.font.width * cwscale);
3112 xw.ch = ceilf(dc.font.height * chscale);
3113
3114 FcPatternDel(pattern, FC_SLANT);
3115 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
3116 if(xloadfont(&dc.ifont, pattern))
3117 die("st: can't open font %s\n", fontstr);
3118
3119 FcPatternDel(pattern, FC_WEIGHT);
3120 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
3121 if(xloadfont(&dc.ibfont, pattern))
3122 die("st: can't open font %s\n", fontstr);
3123
3124 FcPatternDel(pattern, FC_SLANT);
3125 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
3126 if(xloadfont(&dc.bfont, pattern))
3127 die("st: can't open font %s\n", fontstr);
3128
3129 FcPatternDestroy(pattern);
3130 }
3131
3132 void
3133 xunloadfont(Font *f) {
3134 XftFontClose(xw.dpy, f->match);
3135 FcPatternDestroy(f->pattern);
3136 if(f->set)
3137 FcFontSetDestroy(f->set);
3138 }
3139
3140 void
3141 xunloadfonts(void) {
3142 /* Free the loaded fonts in the font cache. */
3143 while(frclen > 0)
3144 XftFontClose(xw.dpy, frc[--frclen].font);
3145
3146 xunloadfont(&dc.font);
3147 xunloadfont(&dc.bfont);
3148 xunloadfont(&dc.ifont);
3149 xunloadfont(&dc.ibfont);
3150 }
3151
3152 void
3153 xzoom(const Arg *arg) {
3154 Arg larg;
3155
3156 larg.f = usedfontsize + arg->f;
3157 xzoomabs(&larg);
3158 }
3159
3160 void
3161 xzoomabs(const Arg *arg) {
3162 xunloadfonts();
3163 xloadfonts(usedfont, arg->f);
3164 cresize(0, 0);
3165 redraw();
3166 xhints();
3167 }
3168
3169 void
3170 xzoomreset(const Arg *arg) {
3171 Arg larg;
3172
3173 if(defaultfontsize > 0) {
3174 larg.f = defaultfontsize;
3175 xzoomabs(&larg);
3176 }
3177 }
3178
3179 void
3180 xinit(void) {
3181 XGCValues gcvalues;
3182 Cursor cursor;
3183 Window parent;
3184 pid_t thispid = getpid();
3185
3186 if(!(xw.dpy = XOpenDisplay(NULL)))
3187 die("Can't open display\n");
3188 xw.scr = XDefaultScreen(xw.dpy);
3189 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
3190
3191 /* font */
3192 if(!FcInit())
3193 die("Could not init fontconfig.\n");
3194
3195 usedfont = (opt_font == NULL)? font : opt_font;
3196 xloadfonts(usedfont, 0);
3197
3198 /* colors */
3199 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
3200 xloadcols();
3201
3202 /* adjust fixed window geometry */
3203 xw.w = 2 * borderpx + term.col * xw.cw;
3204 xw.h = 2 * borderpx + term.row * xw.ch;
3205 if(xw.gm & XNegative)
3206 xw.l += DisplayWidth(xw.dpy, xw.scr) - xw.w - 2;
3207 if(xw.gm & YNegative)
3208 xw.t += DisplayWidth(xw.dpy, xw.scr) - xw.h - 2;
3209
3210 /* Events */
3211 xw.attrs.background_pixel = dc.col[defaultbg].pixel;
3212 xw.attrs.border_pixel = dc.col[defaultbg].pixel;
3213 xw.attrs.bit_gravity = NorthWestGravity;
3214 xw.attrs.event_mask = FocusChangeMask | KeyPressMask
3215 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
3216 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
3217 xw.attrs.colormap = xw.cmap;
3218
3219 if (!(opt_embed && (parent = strtol(opt_embed, NULL, 0))))
3220 parent = XRootWindow(xw.dpy, xw.scr);
3221 xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
3222 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
3223 xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
3224 | CWEventMask | CWColormap, &xw.attrs);
3225
3226 memset(&gcvalues, 0, sizeof(gcvalues));
3227 gcvalues.graphics_exposures = False;
3228 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
3229 &gcvalues);
3230 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
3231 DefaultDepth(xw.dpy, xw.scr));
3232 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
3233 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
3234
3235 /* Xft rendering context */
3236 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
3237
3238 /* input methods */
3239 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3240 XSetLocaleModifiers("@im=local");
3241 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3242 XSetLocaleModifiers("@im=");
3243 if((xw.xim = XOpenIM(xw.dpy,
3244 NULL, NULL, NULL)) == NULL) {
3245 die("XOpenIM failed. Could not open input"
3246 " device.\n");
3247 }
3248 }
3249 }
3250 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
3251 | XIMStatusNothing, XNClientWindow, xw.win,
3252 XNFocusWindow, xw.win, NULL);
3253 if(xw.xic == NULL)
3254 die("XCreateIC failed. Could not obtain input method.\n");
3255
3256 /* white cursor, black outline */
3257 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
3258 XDefineCursor(xw.dpy, xw.win, cursor);
3259 XRecolorCursor(xw.dpy, cursor,
3260 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
3261 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
3262
3263 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
3264 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
3265 xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
3266 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
3267
3268 xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
3269 XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
3270 PropModeReplace, (uchar *)&thispid, 1);
3271
3272 xresettitle();
3273 XMapWindow(xw.dpy, xw.win);
3274 xhints();
3275 XSync(xw.dpy, False);
3276 }
3277
3278 int
3279 xmakeglyphfontspecs(XftGlyphFontSpec *specs, const Glyph *glyphs, int len, int x, int y)
3280 {
3281 float winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch, xp, yp;
3282 ushort mode, prevmode = USHRT_MAX;
3283 Font *font = &dc.font;
3284 int frcflags = FRC_NORMAL;
3285 float runewidth = xw.cw;
3286 Rune rune;
3287 FT_UInt glyphidx;
3288 FcResult fcres;
3289 FcPattern *fcpattern, *fontpattern;
3290 FcFontSet *fcsets[] = { NULL };
3291 FcCharSet *fccharset;
3292 int i, f, numspecs = 0;
3293
3294 for(i = 0, xp = winx, yp = winy + font->ascent; i < len; ++i) {
3295 /* Fetch rune and mode for current glyph. */
3296 rune = glyphs[i].u;
3297 mode = glyphs[i].mode;
3298
3299 /* Skip dummy wide-character spacing. */
3300 if(mode == ATTR_WDUMMY)
3301 continue;
3302
3303 /* Determine font for glyph if different from previous glyph. */
3304 if(prevmode != mode) {
3305 prevmode = mode;
3306 font = &dc.font;
3307 frcflags = FRC_NORMAL;
3308 runewidth = xw.cw * ((mode & ATTR_WIDE) ? 2.0f : 1.0f);
3309 if((mode & ATTR_ITALIC) && (mode & ATTR_BOLD)) {
3310 font = &dc.ibfont;
3311 frcflags = FRC_ITALICBOLD;
3312 } else if(mode & ATTR_ITALIC) {
3313 font = &dc.ifont;
3314 frcflags = FRC_ITALIC;
3315 } else if(mode & ATTR_BOLD) {
3316 font = &dc.bfont;
3317 frcflags = FRC_BOLD;
3318 }
3319 yp = winy + font->ascent;
3320 }
3321
3322 /* Lookup character index with default font. */
3323 glyphidx = XftCharIndex(xw.dpy, font->match, rune);
3324 if(glyphidx) {
3325 specs[numspecs].font = font->match;
3326 specs[numspecs].glyph = glyphidx;
3327 specs[numspecs].x = (short)xp;
3328 specs[numspecs].y = (short)yp;
3329 xp += runewidth;
3330 numspecs++;
3331 continue;
3332 }
3333
3334 /* Fallback on font cache, search the font cache for match. */
3335 for(f = 0; f < frclen; f++) {
3336 glyphidx = XftCharIndex(xw.dpy, frc[f].font, rune);
3337 /* Everything correct. */
3338 if(glyphidx && frc[f].flags == frcflags)
3339 break;
3340 /* We got a default font for a not found glyph. */
3341 if(!glyphidx && frc[f].flags == frcflags
3342 && frc[f].unicodep == rune) {
3343 break;
3344 }
3345 }
3346
3347 /* Nothing was found. Use fontconfig to find matching font. */
3348 if(f >= frclen) {
3349 if(!font->set)
3350 font->set = FcFontSort(0, font->pattern,
3351 1, 0, &fcres);
3352 fcsets[0] = font->set;
3353
3354 /*
3355 * Nothing was found in the cache. Now use
3356 * some dozen of Fontconfig calls to get the
3357 * font for one single character.
3358 *
3359 * Xft and fontconfig are design failures.
3360 */
3361 fcpattern = FcPatternDuplicate(font->pattern);
3362 fccharset = FcCharSetCreate();
3363
3364 FcCharSetAddChar(fccharset, rune);
3365 FcPatternAddCharSet(fcpattern, FC_CHARSET,
3366 fccharset);
3367 FcPatternAddBool(fcpattern, FC_SCALABLE, 1);
3368
3369 FcConfigSubstitute(0, fcpattern,
3370 FcMatchPattern);
3371 FcDefaultSubstitute(fcpattern);
3372
3373 fontpattern = FcFontSetMatch(0, fcsets, 1,
3374 fcpattern, &fcres);
3375
3376 /*
3377 * Overwrite or create the new cache entry.
3378 */
3379 if(frclen >= LEN(frc)) {
3380 frclen = LEN(frc) - 1;
3381 XftFontClose(xw.dpy, frc[frclen].font);
3382 frc[frclen].unicodep = 0;
3383 }
3384
3385 frc[frclen].font = XftFontOpenPattern(xw.dpy,
3386 fontpattern);
3387 frc[frclen].flags = frcflags;
3388 frc[frclen].unicodep = rune;
3389
3390 glyphidx = XftCharIndex(xw.dpy, frc[frclen].font, rune);
3391
3392 f = frclen;
3393 frclen++;
3394
3395 FcPatternDestroy(fcpattern);
3396 FcCharSetDestroy(fccharset);
3397 }
3398
3399 specs[numspecs].font = frc[f].font;
3400 specs[numspecs].glyph = glyphidx;
3401 specs[numspecs].x = (short)xp;
3402 specs[numspecs].y = (short)(winy + frc[f].font->ascent);
3403 xp += runewidth;
3404 numspecs++;
3405 }
3406
3407 return numspecs;
3408 }
3409
3410 void
3411 xdrawglyphfontspecs(const XftGlyphFontSpec *specs, Glyph base, int len, int x, int y) {
3412 int charlen = len * ((base.mode & ATTR_WIDE) ? 2 : 1);
3413 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
3414 width = charlen * xw.cw;
3415 Color *fg, *bg, *temp, revfg, revbg, truefg, truebg;
3416 XRenderColor colfg, colbg;
3417 XRectangle r;
3418
3419 /* Determine foreground and background colors based on mode. */
3420 if(base.fg == defaultfg) {
3421 if(base.mode & ATTR_ITALIC)
3422 base.fg = defaultitalic;
3423 else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD))
3424 base.fg = defaultitalic;
3425 else if(base.mode & ATTR_UNDERLINE)
3426 base.fg = defaultunderline;
3427 }
3428
3429 if(IS_TRUECOL(base.fg)) {
3430 colfg.alpha = 0xffff;
3431 colfg.red = TRUERED(base.fg);
3432 colfg.green = TRUEGREEN(base.fg);
3433 colfg.blue = TRUEBLUE(base.fg);
3434 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
3435 fg = &truefg;
3436 } else {
3437 fg = &dc.col[base.fg];
3438 }
3439
3440 if(IS_TRUECOL(base.bg)) {
3441 colbg.alpha = 0xffff;
3442 colbg.green = TRUEGREEN(base.bg);
3443 colbg.red = TRUERED(base.bg);
3444 colbg.blue = TRUEBLUE(base.bg);
3445 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
3446 bg = &truebg;
3447 } else {
3448 bg = &dc.col[base.bg];
3449 }
3450
3451 /* Change basic system colors [0-7] to bright system colors [8-15] */
3452 if((base.mode & ATTR_BOLD_FAINT) == ATTR_BOLD && BETWEEN(base.fg, 0, 7))
3453 fg = &dc.col[base.fg + 8];
3454
3455 if(IS_SET(MODE_REVERSE)) {
3456 if(fg == &dc.col[defaultfg]) {
3457 fg = &dc.col[defaultbg];
3458 } else {
3459 colfg.red = ~fg->color.red;
3460 colfg.green = ~fg->color.green;
3461 colfg.blue = ~fg->color.blue;
3462 colfg.alpha = fg->color.alpha;
3463 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
3464 &revfg);
3465 fg = &revfg;
3466 }
3467
3468 if(bg == &dc.col[defaultbg]) {
3469 bg = &dc.col[defaultfg];
3470 } else {
3471 colbg.red = ~bg->color.red;
3472 colbg.green = ~bg->color.green;
3473 colbg.blue = ~bg->color.blue;
3474 colbg.alpha = bg->color.alpha;
3475 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
3476 &revbg);
3477 bg = &revbg;
3478 }
3479 }
3480
3481 if(base.mode & ATTR_REVERSE) {
3482 temp = fg;
3483 fg = bg;
3484 bg = temp;
3485 }
3486
3487 if((base.mode & ATTR_BOLD_FAINT) == ATTR_FAINT) {
3488 colfg.red = fg->color.red / 2;
3489 colfg.green = fg->color.green / 2;
3490 colfg.blue = fg->color.blue / 2;
3491 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
3492 fg = &revfg;
3493 }
3494
3495 if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
3496 fg = bg;
3497
3498 if(base.mode & ATTR_INVISIBLE)
3499 fg = bg;
3500
3501 /* Intelligent cleaning up of the borders. */
3502 if(x == 0) {
3503 xclear(0, (y == 0)? 0 : winy, borderpx,
3504 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
3505 }
3506 if(x + charlen >= term.col) {
3507 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
3508 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
3509 }
3510 if(y == 0)
3511 xclear(winx, 0, winx + width, borderpx);
3512 if(y == term.row-1)
3513 xclear(winx, winy + xw.ch, winx + width, xw.h);
3514
3515 /* Clean up the region we want to draw to. */
3516 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
3517
3518 /* Set the clip region because Xft is sometimes dirty. */
3519 r.x = 0;
3520 r.y = 0;
3521 r.height = xw.ch;
3522 r.width = width;
3523 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
3524
3525 /* Render the glyphs. */
3526 XftDrawGlyphFontSpec(xw.draw, fg, specs, len);
3527
3528 /* Render underline and strikethrough. */
3529 if(base.mode & ATTR_UNDERLINE) {
3530 XftDrawRect(xw.draw, fg, winx, winy + dc.font.ascent + 1,
3531 width, 1);
3532 }
3533
3534 if(base.mode & ATTR_STRUCK) {
3535 XftDrawRect(xw.draw, fg, winx, winy + 2 * dc.font.ascent / 3,
3536 width, 1);
3537 }
3538
3539 /* Reset clip to none. */
3540 XftDrawSetClip(xw.draw, 0);
3541 }
3542
3543 void
3544 xdrawglyph(Glyph g, int x, int y) {
3545 int numspecs;
3546 XftGlyphFontSpec spec;
3547 numspecs = xmakeglyphfontspecs(&spec, &g, 1, x, y);
3548 xdrawglyphfontspecs(&spec, g, numspecs, x, y);
3549 }
3550
3551 void
3552 xdrawcursor(void) {
3553 static int oldx = 0, oldy = 0;
3554 int curx;
3555 Glyph g = {' ', ATTR_NULL, defaultbg, defaultcs};
3556
3557 LIMIT(oldx, 0, term.col-1);
3558 LIMIT(oldy, 0, term.row-1);
3559
3560 curx = term.c.x;
3561
3562 /* adjust position if in dummy */
3563 if(term.line[oldy][oldx].mode & ATTR_WDUMMY)
3564 oldx--;
3565 if(term.line[term.c.y][curx].mode & ATTR_WDUMMY)
3566 curx--;
3567
3568 g.u = term.line[term.c.y][term.c.x].u;
3569
3570 /* remove the old cursor */
3571 xdrawglyph(term.line[oldy][oldx], oldx, oldy);
3572
3573 if(IS_SET(MODE_HIDE))
3574 return;
3575
3576 /* draw the new one */
3577 if(xw.state & WIN_FOCUSED) {
3578 switch (xw.cursor) {
3579 case 0: /* Blinking Block */
3580 case 1: /* Blinking Block (Default) */
3581 case 2: /* Steady Block */
3582 if(IS_SET(MODE_REVERSE)) {
3583 g.mode |= ATTR_REVERSE;
3584 g.fg = defaultcs;
3585 g.bg = defaultfg;
3586 }
3587
3588 g.mode |= term.line[term.c.y][curx].mode & ATTR_WIDE;
3589 xdrawglyph(g, term.c.x, term.c.y);
3590 break;
3591 case 3: /* Blinking Underline */
3592 case 4: /* Steady Underline */
3593 XftDrawRect(xw.draw, &dc.col[defaultcs],
3594 borderpx + curx * xw.cw,
3595 borderpx + (term.c.y + 1) * xw.ch - cursorthickness,
3596 xw.cw, cursorthickness);
3597 break;
3598 case 5: /* Blinking bar */
3599 case 6: /* Steady bar */
3600 XftDrawRect(xw.draw, &dc.col[defaultcs],
3601 borderpx + curx * xw.cw,
3602 borderpx + term.c.y * xw.ch,
3603 cursorthickness, xw.ch);
3604 break;
3605 }
3606 } else {
3607 XftDrawRect(xw.draw, &dc.col[defaultcs],
3608 borderpx + curx * xw.cw,
3609 borderpx + term.c.y * xw.ch,
3610 xw.cw - 1, 1);
3611 XftDrawRect(xw.draw, &dc.col[defaultcs],
3612 borderpx + curx * xw.cw,
3613 borderpx + term.c.y * xw.ch,
3614 1, xw.ch - 1);
3615 XftDrawRect(xw.draw, &dc.col[defaultcs],
3616 borderpx + (curx + 1) * xw.cw - 1,
3617 borderpx + term.c.y * xw.ch,
3618 1, xw.ch - 1);
3619 XftDrawRect(xw.draw, &dc.col[defaultcs],
3620 borderpx + curx * xw.cw,
3621 borderpx + (term.c.y + 1) * xw.ch - 1,
3622 xw.cw, 1);
3623 }
3624 oldx = curx, oldy = term.c.y;
3625 }
3626
3627
3628 void
3629 xsettitle(char *p) {
3630 XTextProperty prop;
3631
3632 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3633 &prop);
3634 XSetWMName(xw.dpy, xw.win, &prop);
3635 XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
3636 XFree(prop.value);
3637 }
3638
3639 void
3640 xresettitle(void) {
3641 xsettitle(opt_title ? opt_title : "st");
3642 }
3643
3644 void
3645 redraw(void) {
3646 tfulldirt();
3647 draw();
3648 }
3649
3650 void
3651 draw(void) {
3652 drawregion(0, 0, term.col, term.row);
3653 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3654 xw.h, 0, 0);
3655 XSetForeground(xw.dpy, dc.gc,
3656 dc.col[IS_SET(MODE_REVERSE)?
3657 defaultfg : defaultbg].pixel);
3658 }
3659
3660 void
3661 drawregion(int x1, int y1, int x2, int y2) {
3662 int i, x, y, ox, numspecs;
3663 Glyph base, new;
3664 XftGlyphFontSpec* specs;
3665 int ena_sel = sel.ob.x != -1 && sel.alt == IS_SET(MODE_ALTSCREEN);
3666
3667 if(!(xw.state & WIN_VISIBLE))
3668 return;
3669
3670 for(y = y1; y < y2; y++) {
3671 if(!term.dirty[y])
3672 continue;
3673
3674 xtermclear(0, y, term.col, y);
3675 term.dirty[y] = 0;
3676
3677 specs = term.specbuf;
3678 numspecs = xmakeglyphfontspecs(specs, &term.line[y][x1], x2 - x1, x1, y);
3679
3680 i = ox = 0;
3681 for(x = x1; x < x2 && i < numspecs; x++) {
3682 new = term.line[y][x];
3683 if(new.mode == ATTR_WDUMMY)
3684 continue;
3685 if(ena_sel && selected(x, y))
3686 new.mode ^= ATTR_REVERSE;
3687 if(i > 0 && ATTRCMP(base, new)) {
3688 xdrawglyphfontspecs(specs, base, i, ox, y);
3689 specs += i;
3690 numspecs -= i;
3691 i = 0;
3692 }
3693 if(i == 0) {
3694 ox = x;
3695 base = new;
3696 }
3697 i++;
3698 }
3699 if(i > 0)
3700 xdrawglyphfontspecs(specs, base, i, ox, y);
3701 }
3702 xdrawcursor();
3703 }
3704
3705 void
3706 expose(XEvent *ev) {
3707 redraw();
3708 }
3709
3710 void
3711 visibility(XEvent *ev) {
3712 XVisibilityEvent *e = &ev->xvisibility;
3713
3714 MODBIT(xw.state, e->state != VisibilityFullyObscured, WIN_VISIBLE);
3715 }
3716
3717 void
3718 unmap(XEvent *ev) {
3719 xw.state &= ~WIN_VISIBLE;
3720 }
3721
3722 void
3723 xsetpointermotion(int set) {
3724 MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
3725 XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
3726 }
3727
3728 void
3729 xseturgency(int add) {
3730 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3731
3732 MODBIT(h->flags, add, XUrgencyHint);
3733 XSetWMHints(xw.dpy, xw.win, h);
3734 XFree(h);
3735 }
3736
3737 void
3738 focus(XEvent *ev) {
3739 XFocusChangeEvent *e = &ev->xfocus;
3740
3741 if(e->mode == NotifyGrab)
3742 return;
3743
3744 if(ev->type == FocusIn) {
3745 XSetICFocus(xw.xic);
3746 xw.state |= WIN_FOCUSED;
3747 xseturgency(0);
3748 if(IS_SET(MODE_FOCUS))
3749 ttywrite("\033[I", 3);
3750 } else {
3751 XUnsetICFocus(xw.xic);
3752 xw.state &= ~WIN_FOCUSED;
3753 if(IS_SET(MODE_FOCUS))
3754 ttywrite("\033[O", 3);
3755 }
3756 }
3757
3758 int
3759 match(uint mask, uint state) {
3760 return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
3761 }
3762
3763 void
3764 numlock(const Arg *dummy) {
3765 term.numlock ^= 1;
3766 }
3767
3768 char*
3769 kmap(KeySym k, uint state) {
3770 Key *kp;
3771 int i;
3772
3773 /* Check for mapped keys out of X11 function keys. */
3774 for(i = 0; i < LEN(mappedkeys); i++) {
3775 if(mappedkeys[i] == k)
3776 break;
3777 }
3778 if(i == LEN(mappedkeys)) {
3779 if((k & 0xFFFF) < 0xFD00)
3780 return NULL;
3781 }
3782
3783 for(kp = key; kp < key + LEN(key); kp++) {
3784 if(kp->k != k)
3785 continue;
3786
3787 if(!match(kp->mask, state))
3788 continue;
3789
3790 if(IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
3791 continue;
3792 if(term.numlock && kp->appkey == 2)
3793 continue;
3794
3795 if(IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
3796 continue;
3797
3798 if(IS_SET(MODE_CRLF) ? kp->crlf < 0 : kp->crlf > 0)
3799 continue;
3800
3801 return kp->s;
3802 }
3803
3804 return NULL;
3805 }
3806
3807 void
3808 kpress(XEvent *ev) {
3809 XKeyEvent *e = &ev->xkey;
3810 KeySym ksym;
3811 char buf[32], *customkey;
3812 int len;
3813 Rune c;
3814 Status status;
3815 Shortcut *bp;
3816
3817 if(IS_SET(MODE_KBDLOCK))
3818 return;
3819
3820 len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
3821 /* 1. shortcuts */
3822 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3823 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3824 bp->func(&(bp->arg));
3825 return;
3826 }
3827 }
3828
3829 /* 2. custom keys from config.h */
3830 if((customkey = kmap(ksym, e->state))) {
3831 ttysend(customkey, strlen(customkey));
3832 return;
3833 }
3834
3835 /* 3. composed string from input method */
3836 if(len == 0)
3837 return;
3838 if(len == 1 && e->state & Mod1Mask) {
3839 if(IS_SET(MODE_8BIT)) {
3840 if(*buf < 0177) {
3841 c = *buf | 0x80;
3842 len = utf8encode(c, buf);
3843 }
3844 } else {
3845 buf[1] = buf[0];
3846 buf[0] = '\033';
3847 len = 2;
3848 }
3849 }
3850 ttysend(buf, len);
3851 }
3852
3853
3854 void
3855 cmessage(XEvent *e) {
3856 /*
3857 * See xembed specs
3858 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3859 */
3860 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3861 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3862 xw.state |= WIN_FOCUSED;
3863 xseturgency(0);
3864 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3865 xw.state &= ~WIN_FOCUSED;
3866 }
3867 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3868 /* Send SIGHUP to shell */
3869 kill(pid, SIGHUP);
3870 exit(0);
3871 }
3872 }
3873
3874 void
3875 cresize(int width, int height) {
3876 int col, row;
3877
3878 if(width != 0)
3879 xw.w = width;
3880 if(height != 0)
3881 xw.h = height;
3882
3883 col = (xw.w - 2 * borderpx) / xw.cw;
3884 row = (xw.h - 2 * borderpx) / xw.ch;
3885
3886 tresize(col, row);
3887 xresize(col, row);
3888 ttyresize();
3889 }
3890
3891 void
3892 resize(XEvent *e) {
3893 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3894 return;
3895
3896 cresize(e->xconfigure.width, e->xconfigure.height);
3897 }
3898
3899 void
3900 run(void) {
3901 XEvent ev;
3902 int w = xw.w, h = xw.h;
3903 fd_set rfd;
3904 int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3905 struct timespec drawtimeout, *tv = NULL, now, last, lastblink;
3906 long deltatime;
3907
3908 /* Waiting for window mapping */
3909 do {
3910 XNextEvent(xw.dpy, &ev);
3911 /*
3912 * XFilterEvent is required to be called after you using XOpenIM,
3913 * this is not unnecessary.It does not only filter the key event,
3914 * but some clientmessage for input method as well.
3915 */
3916 if(XFilterEvent(&ev, None))
3917 continue;
3918 if(ev.type == ConfigureNotify) {
3919 w = ev.xconfigure.width;
3920 h = ev.xconfigure.height;
3921 }
3922 } while(ev.type != MapNotify);
3923
3924 ttynew();
3925 cresize(w, h);
3926
3927 clock_gettime(CLOCK_MONOTONIC, &last);
3928 lastblink = last;
3929
3930 for(xev = actionfps;;) {
3931 FD_ZERO(&rfd);
3932 FD_SET(cmdfd, &rfd);
3933 FD_SET(xfd, &rfd);
3934
3935 if(pselect(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv, NULL) < 0) {
3936 if(errno == EINTR)
3937 continue;
3938 die("select failed: %s\n", strerror(errno));
3939 }
3940 if(FD_ISSET(cmdfd, &rfd)) {
3941 ttyread();
3942 if(blinktimeout) {
3943 blinkset = tattrset(ATTR_BLINK);
3944 if(!blinkset)
3945 MODBIT(term.mode, 0, MODE_BLINK);
3946 }
3947 }
3948
3949 if(FD_ISSET(xfd, &rfd))
3950 xev = actionfps;
3951
3952 clock_gettime(CLOCK_MONOTONIC, &now);
3953 drawtimeout.tv_sec = 0;
3954 drawtimeout.tv_nsec = (1000 * 1E6)/ xfps;
3955 tv = &drawtimeout;
3956
3957 dodraw = 0;
3958 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
3959 tsetdirtattr(ATTR_BLINK);
3960 term.mode ^= MODE_BLINK;
3961 lastblink = now;
3962 dodraw = 1;
3963 }
3964 deltatime = TIMEDIFF(now, last);
3965 if(deltatime > 1000 / (xev ? xfps : actionfps)) {
3966 dodraw = 1;
3967 last = now;
3968 }
3969
3970 if(dodraw) {
3971 while(XPending(xw.dpy)) {
3972 XNextEvent(xw.dpy, &ev);
3973 if(XFilterEvent(&ev, None))
3974 continue;
3975 if(handler[ev.type])
3976 (handler[ev.type])(&ev);
3977 }
3978
3979 draw();
3980 XFlush(xw.dpy);
3981
3982 if(xev && !FD_ISSET(xfd, &rfd))
3983 xev--;
3984 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
3985 if(blinkset) {
3986 if(TIMEDIFF(now, lastblink) \
3987 > blinktimeout) {
3988 drawtimeout.tv_nsec = 1000;
3989 } else {
3990 drawtimeout.tv_nsec = (1E6 * \
3991 (blinktimeout - \
3992 TIMEDIFF(now,
3993 lastblink)));
3994 }
3995 drawtimeout.tv_sec = \
3996 drawtimeout.tv_nsec / 1E9;
3997 drawtimeout.tv_nsec %= (long)1E9;
3998 } else {
3999 tv = NULL;
4000 }
4001 }
4002 }
4003 }
4004 }
4005
4006 void
4007 usage(void) {
4008 die("%s " VERSION " (c) 2010-2015 st engineers\n"
4009 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]\n"
4010 " [-i] [-t title] [-w windowid] [-e command ...] [command ...]\n"
4011 " st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]\n"
4012 " [-i] [-t title] [-w windowid] [-l line] [stty_args ...]\n",
4013 argv0);
4014 }
4015
4016 int
4017 main(int argc, char *argv[]) {
4018 uint cols = 80, rows = 24;
4019
4020 xw.l = xw.t = 0;
4021 xw.isfixed = False;
4022 xw.cursor = 0;
4023
4024 ARGBEGIN {
4025 case 'a':
4026 allowaltscreen = 0;
4027 break;
4028 case 'c':
4029 opt_class = EARGF(usage());
4030 break;
4031 case 'e':
4032 if(argc > 0)
4033 --argc, ++argv;
4034 goto run;
4035 case 'f':
4036 opt_font = EARGF(usage());
4037 break;
4038 case 'g':
4039 xw.gm = XParseGeometry(EARGF(usage()),
4040 &xw.l, &xw.t, &cols, &rows);
4041 break;
4042 case 'i':
4043 xw.isfixed = 1;
4044 break;
4045 case 'o':
4046 opt_io = EARGF(usage());
4047 break;
4048 case 'l':
4049 opt_line = EARGF(usage());
4050 break;
4051 case 't':
4052 opt_title = EARGF(usage());
4053 break;
4054 case 'w':
4055 opt_embed = EARGF(usage());
4056 break;
4057 case 'v':
4058 default:
4059 usage();
4060 } ARGEND;
4061
4062 run:
4063 if(argc > 0) {
4064 /* eat all remaining arguments */
4065 opt_cmd = argv;
4066 if(!opt_title && !opt_line)
4067 opt_title = basename(xstrdup(argv[0]));
4068 }
4069 setlocale(LC_CTYPE, "");
4070 XSetLocaleModifiers("");
4071 tnew(MAX(cols, 1), MAX(rows, 1));
4072 xinit();
4073 selinit();
4074 run();
4075
4076 return 0;
4077 }
4078