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Remove useless if in tstrsequence.
[st.git] / st.c
1 /* See LICENSE for license details. */
2 #include <ctype.h>
3 #include <errno.h>
4 #include <fcntl.h>
5 #include <limits.h>
6 #include <locale.h>
7 #include <pwd.h>
8 #include <stdarg.h>
9 #include <stdbool.h>
10 #include <stdio.h>
11 #include <stdlib.h>
12 #include <string.h>
13 #include <signal.h>
14 #include <stdint.h>
15 #include <sys/ioctl.h>
16 #include <sys/select.h>
17 #include <sys/stat.h>
18 #include <sys/time.h>
19 #include <sys/types.h>
20 #include <sys/wait.h>
21 #include <time.h>
22 #include <unistd.h>
23 #include <libgen.h>
24 #include <X11/Xatom.h>
25 #include <X11/Xlib.h>
26 #include <X11/Xutil.h>
27 #include <X11/cursorfont.h>
28 #include <X11/keysym.h>
29 #include <X11/Xft/Xft.h>
30 #include <X11/XKBlib.h>
31 #include <fontconfig/fontconfig.h>
32 #include <wchar.h>
33
34 #include "arg.h"
35
36 char *argv0;
37
38 #define Glyph Glyph_
39 #define Font Font_
40
41 #if defined(__linux)
42 #include <pty.h>
43 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
44 #include <util.h>
45 #elif defined(__FreeBSD__) || defined(__DragonFly__)
46 #include <libutil.h>
47 #endif
48
49
50 /* XEMBED messages */
51 #define XEMBED_FOCUS_IN 4
52 #define XEMBED_FOCUS_OUT 5
53
54 /* Arbitrary sizes */
55 #define UTF_INVALID 0xFFFD
56 #define UTF_SIZ 4
57 #define ESC_BUF_SIZ (128*UTF_SIZ)
58 #define ESC_ARG_SIZ 16
59 #define STR_BUF_SIZ ESC_BUF_SIZ
60 #define STR_ARG_SIZ ESC_ARG_SIZ
61 #define DRAW_BUF_SIZ 20*1024
62 #define XK_ANY_MOD UINT_MAX
63 #define XK_NO_MOD 0
64 #define XK_SWITCH_MOD (1<<13)
65
66 /* macros */
67 #define MIN(a, b) ((a) < (b) ? (a) : (b))
68 #define MAX(a, b) ((a) < (b) ? (b) : (a))
69 #define LEN(a) (sizeof(a) / sizeof(a)[0])
70 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
71 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
72 #define ISCONTROLC0(c) (BETWEEN(c, 0, 0x1f) || (c) == '\177')
73 #define ISCONTROLC1(c) (BETWEEN(c, 0x80, 0x9f))
74 #define ISCONTROL(c) (ISCONTROLC0(c) || ISCONTROLC1(c))
75 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
76 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
77 #define IS_SET(flag) ((term.mode & (flag)) != 0)
78 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_nsec-t2.tv_nsec)/1E6)
79 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
80
81 #define TRUECOLOR(r,g,b) (1 << 24 | (r) << 16 | (g) << 8 | (b))
82 #define IS_TRUECOL(x) (1 << 24 & (x))
83 #define TRUERED(x) (((x) & 0xff0000) >> 8)
84 #define TRUEGREEN(x) (((x) & 0xff00))
85 #define TRUEBLUE(x) (((x) & 0xff) << 8)
86
87
88 enum glyph_attribute {
89 ATTR_NULL = 0,
90 ATTR_BOLD = 1 << 0,
91 ATTR_FAINT = 1 << 1,
92 ATTR_ITALIC = 1 << 2,
93 ATTR_UNDERLINE = 1 << 3,
94 ATTR_BLINK = 1 << 4,
95 ATTR_REVERSE = 1 << 5,
96 ATTR_INVISIBLE = 1 << 6,
97 ATTR_STRUCK = 1 << 7,
98 ATTR_WRAP = 1 << 8,
99 ATTR_WIDE = 1 << 9,
100 ATTR_WDUMMY = 1 << 10,
101 };
102
103 enum cursor_movement {
104 CURSOR_SAVE,
105 CURSOR_LOAD
106 };
107
108 enum cursor_state {
109 CURSOR_DEFAULT = 0,
110 CURSOR_WRAPNEXT = 1,
111 CURSOR_ORIGIN = 2
112 };
113
114 enum term_mode {
115 MODE_WRAP = 1 << 0,
116 MODE_INSERT = 1 << 1,
117 MODE_APPKEYPAD = 1 << 2,
118 MODE_ALTSCREEN = 1 << 3,
119 MODE_CRLF = 1 << 4,
120 MODE_MOUSEBTN = 1 << 5,
121 MODE_MOUSEMOTION = 1 << 6,
122 MODE_REVERSE = 1 << 7,
123 MODE_KBDLOCK = 1 << 8,
124 MODE_HIDE = 1 << 9,
125 MODE_ECHO = 1 << 10,
126 MODE_APPCURSOR = 1 << 11,
127 MODE_MOUSESGR = 1 << 12,
128 MODE_8BIT = 1 << 13,
129 MODE_BLINK = 1 << 14,
130 MODE_FBLINK = 1 << 15,
131 MODE_FOCUS = 1 << 16,
132 MODE_MOUSEX10 = 1 << 17,
133 MODE_MOUSEMANY = 1 << 18,
134 MODE_BRCKTPASTE = 1 << 19,
135 MODE_PRINT = 1 << 20,
136 MODE_MOUSE = MODE_MOUSEBTN|MODE_MOUSEMOTION|MODE_MOUSEX10\
137 |MODE_MOUSEMANY,
138 };
139
140 enum charset {
141 CS_GRAPHIC0,
142 CS_GRAPHIC1,
143 CS_UK,
144 CS_USA,
145 CS_MULTI,
146 CS_GER,
147 CS_FIN
148 };
149
150 enum escape_state {
151 ESC_START = 1,
152 ESC_CSI = 2,
153 ESC_STR = 4, /* DCS, OSC, PM, APC */
154 ESC_ALTCHARSET = 8,
155 ESC_STR_END = 16, /* a final string was encountered */
156 ESC_TEST = 32, /* Enter in test mode */
157 };
158
159 enum window_state {
160 WIN_VISIBLE = 1,
161 WIN_REDRAW = 2,
162 WIN_FOCUSED = 4
163 };
164
165 enum selection_type {
166 SEL_REGULAR = 1,
167 SEL_RECTANGULAR = 2
168 };
169
170 enum selection_snap {
171 SNAP_WORD = 1,
172 SNAP_LINE = 2
173 };
174
175 typedef unsigned char uchar;
176 typedef unsigned int uint;
177 typedef unsigned long ulong;
178 typedef unsigned short ushort;
179
180 typedef XftDraw *Draw;
181 typedef XftColor Color;
182
183 typedef struct {
184 char c[UTF_SIZ]; /* character code */
185 ushort mode; /* attribute flags */
186 uint32_t fg; /* foreground */
187 uint32_t bg; /* background */
188 } Glyph;
189
190 typedef Glyph *Line;
191
192 typedef struct {
193 Glyph attr; /* current char attributes */
194 int x;
195 int y;
196 char state;
197 } TCursor;
198
199 /* CSI Escape sequence structs */
200 /* ESC '[' [[ [<priv>] <arg> [;]] <mode> [<mode>]] */
201 typedef struct {
202 char buf[ESC_BUF_SIZ]; /* raw string */
203 int len; /* raw string length */
204 char priv;
205 int arg[ESC_ARG_SIZ];
206 int narg; /* nb of args */
207 char mode[2];
208 } CSIEscape;
209
210 /* STR Escape sequence structs */
211 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
212 typedef struct {
213 char type; /* ESC type ... */
214 char buf[STR_BUF_SIZ]; /* raw string */
215 int len; /* raw string length */
216 char *args[STR_ARG_SIZ];
217 int narg; /* nb of args */
218 } STREscape;
219
220 /* Internal representation of the screen */
221 typedef struct {
222 int row; /* nb row */
223 int col; /* nb col */
224 Line *line; /* screen */
225 Line *alt; /* alternate screen */
226 bool *dirty; /* dirtyness of lines */
227 TCursor c; /* cursor */
228 int top; /* top scroll limit */
229 int bot; /* bottom scroll limit */
230 int mode; /* terminal mode flags */
231 int esc; /* escape state flags */
232 char trantbl[4]; /* charset table translation */
233 int charset; /* current charset */
234 int icharset; /* selected charset for sequence */
235 bool numlock; /* lock numbers in keyboard */
236 bool *tabs;
237 } Term;
238
239 /* Purely graphic info */
240 typedef struct {
241 Display *dpy;
242 Colormap cmap;
243 Window win;
244 Drawable buf;
245 Atom xembed, wmdeletewin, netwmname, netwmpid;
246 XIM xim;
247 XIC xic;
248 Draw draw;
249 Visual *vis;
250 XSetWindowAttributes attrs;
251 int scr;
252 bool isfixed; /* is fixed geometry? */
253 int l, t; /* left and top offset */
254 int gm; /* geometry mask */
255 int tw, th; /* tty width and height */
256 int w, h; /* window width and height */
257 int ch; /* char height */
258 int cw; /* char width */
259 char state; /* focus, redraw, visible */
260 int cursor; /* cursor style */
261 } XWindow;
262
263 typedef struct {
264 uint b;
265 uint mask;
266 char *s;
267 } Mousekey;
268
269 typedef struct {
270 KeySym k;
271 uint mask;
272 char *s;
273 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
274 signed char appkey; /* application keypad */
275 signed char appcursor; /* application cursor */
276 signed char crlf; /* crlf mode */
277 } Key;
278
279 typedef struct {
280 int mode;
281 int type;
282 int snap;
283 /*
284 * Selection variables:
285 * nb – normalized coordinates of the beginning of the selection
286 * ne – normalized coordinates of the end of the selection
287 * ob – original coordinates of the beginning of the selection
288 * oe – original coordinates of the end of the selection
289 */
290 struct {
291 int x, y;
292 } nb, ne, ob, oe;
293
294 char *primary, *clipboard;
295 Atom xtarget;
296 bool alt;
297 struct timespec tclick1;
298 struct timespec tclick2;
299 } Selection;
300
301 typedef union {
302 int i;
303 uint ui;
304 float f;
305 const void *v;
306 } Arg;
307
308 typedef struct {
309 uint mod;
310 KeySym keysym;
311 void (*func)(const Arg *);
312 const Arg arg;
313 } Shortcut;
314
315 /* function definitions used in config.h */
316 static void clipcopy(const Arg *);
317 static void clippaste(const Arg *);
318 static void numlock(const Arg *);
319 static void selpaste(const Arg *);
320 static void xzoom(const Arg *);
321 static void xzoomabs(const Arg *);
322 static void xzoomreset(const Arg *);
323 static void printsel(const Arg *);
324 static void printscreen(const Arg *) ;
325 static void toggleprinter(const Arg *);
326
327 /* Config.h for applying patches and the configuration. */
328 #include "config.h"
329
330 /* Font structure */
331 typedef struct {
332 int height;
333 int width;
334 int ascent;
335 int descent;
336 short lbearing;
337 short rbearing;
338 XftFont *match;
339 FcFontSet *set;
340 FcPattern *pattern;
341 } Font;
342
343 /* Drawing Context */
344 typedef struct {
345 Color col[MAX(LEN(colorname), 256)];
346 Font font, bfont, ifont, ibfont;
347 GC gc;
348 } DC;
349
350 static void die(const char *, ...);
351 static void draw(void);
352 static void redraw(void);
353 static void drawregion(int, int, int, int);
354 static void execsh(void);
355 static void sigchld(int);
356 static void run(void);
357
358 static void csidump(void);
359 static void csihandle(void);
360 static void csiparse(void);
361 static void csireset(void);
362 static int eschandle(uchar);
363 static void strdump(void);
364 static void strhandle(void);
365 static void strparse(void);
366 static void strreset(void);
367
368 static int tattrset(int);
369 static void tprinter(char *, size_t);
370 static void tdumpsel(void);
371 static void tdumpline(int);
372 static void tdump(void);
373 static void tclearregion(int, int, int, int);
374 static void tcursor(int);
375 static void tdeletechar(int);
376 static void tdeleteline(int);
377 static void tinsertblank(int);
378 static void tinsertblankline(int);
379 static int tlinelen(int);
380 static void tmoveto(int, int);
381 static void tmoveato(int, int);
382 static void tnew(int, int);
383 static void tnewline(int);
384 static void tputtab(int);
385 static void tputc(char *, int);
386 static void treset(void);
387 static void tresize(int, int);
388 static void tscrollup(int, int);
389 static void tscrolldown(int, int);
390 static void tsetattr(int *, int);
391 static void tsetchar(char *, Glyph *, int, int);
392 static void tsetscroll(int, int);
393 static void tswapscreen(void);
394 static void tsetdirt(int, int);
395 static void tsetdirtattr(int);
396 static void tsetmode(bool, bool, int *, int);
397 static void tfulldirt(void);
398 static void techo(char *, int);
399 static void tcontrolcode(uchar );
400 static void tdectest(char );
401 static int32_t tdefcolor(int *, int *, int);
402 static void tdeftran(char);
403 static inline bool match(uint, uint);
404 static void ttynew(void);
405 static void ttyread(void);
406 static void ttyresize(void);
407 static void ttysend(char *, size_t);
408 static void ttywrite(const char *, size_t);
409 static void tstrsequence(uchar);
410
411 static inline ushort sixd_to_16bit(int);
412 static void xdraws(char *, Glyph, int, int, int, int);
413 static void xhints(void);
414 static void xclear(int, int, int, int);
415 static void xdrawcursor(void);
416 static void xinit(void);
417 static void xloadcols(void);
418 static int xsetcolorname(int, const char *);
419 static int xgeommasktogravity(int);
420 static int xloadfont(Font *, FcPattern *);
421 static void xloadfonts(char *, double);
422 static void xsettitle(char *);
423 static void xresettitle(void);
424 static void xsetpointermotion(int);
425 static void xseturgency(int);
426 static void xsetsel(char *);
427 static void xtermclear(int, int, int, int);
428 static void xunloadfont(Font *);
429 static void xunloadfonts(void);
430 static void xresize(int, int);
431
432 static void expose(XEvent *);
433 static void visibility(XEvent *);
434 static void unmap(XEvent *);
435 static char *kmap(KeySym, uint);
436 static void kpress(XEvent *);
437 static void cmessage(XEvent *);
438 static void cresize(int, int);
439 static void resize(XEvent *);
440 static void focus(XEvent *);
441 static void brelease(XEvent *);
442 static void bpress(XEvent *);
443 static void bmotion(XEvent *);
444 static void selnotify(XEvent *);
445 static void selclear(XEvent *);
446 static void selrequest(XEvent *);
447
448 static void selinit(void);
449 static void selnormalize(void);
450 static inline bool selected(int, int);
451 static char *getsel(void);
452 static void selcopy(void);
453 static void selscroll(int, int);
454 static void selsnap(int, int *, int *, int);
455 static int x2col(int);
456 static int y2row(int);
457 static void getbuttoninfo(XEvent *);
458 static void mousereport(XEvent *);
459
460 static size_t utf8decode(char *, long *, size_t);
461 static long utf8decodebyte(char, size_t *);
462 static size_t utf8encode(long, char *, size_t);
463 static char utf8encodebyte(long, size_t);
464 static size_t utf8len(char *);
465 static size_t utf8validate(long *, size_t);
466
467 static ssize_t xwrite(int, const char *, size_t);
468 static void *xmalloc(size_t);
469 static void *xrealloc(void *, size_t);
470 static char *xstrdup(char *);
471
472 static void usage(void);
473
474 static void (*handler[LASTEvent])(XEvent *) = {
475 [KeyPress] = kpress,
476 [ClientMessage] = cmessage,
477 [ConfigureNotify] = resize,
478 [VisibilityNotify] = visibility,
479 [UnmapNotify] = unmap,
480 [Expose] = expose,
481 [FocusIn] = focus,
482 [FocusOut] = focus,
483 [MotionNotify] = bmotion,
484 [ButtonPress] = bpress,
485 [ButtonRelease] = brelease,
486 /*
487 * Uncomment if you want the selection to disappear when you select something
488 * different in another window.
489 */
490 /* [SelectionClear] = selclear, */
491 [SelectionNotify] = selnotify,
492 [SelectionRequest] = selrequest,
493 };
494
495 /* Globals */
496 static DC dc;
497 static XWindow xw;
498 static Term term;
499 static CSIEscape csiescseq;
500 static STREscape strescseq;
501 static int cmdfd;
502 static pid_t pid;
503 static Selection sel;
504 static int iofd = STDOUT_FILENO;
505 static char **opt_cmd = NULL;
506 static char *opt_io = NULL;
507 static char *opt_title = NULL;
508 static char *opt_embed = NULL;
509 static char *opt_class = NULL;
510 static char *opt_font = NULL;
511 static int oldbutton = 3; /* button event on startup: 3 = release */
512
513 static char *usedfont = NULL;
514 static double usedfontsize = 0;
515 static double defaultfontsize = 0;
516
517 static uchar utfbyte[UTF_SIZ + 1] = {0x80, 0, 0xC0, 0xE0, 0xF0};
518 static uchar utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
519 static long utfmin[UTF_SIZ + 1] = { 0, 0, 0x80, 0x800, 0x10000};
520 static long utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
521
522 /* Font Ring Cache */
523 enum {
524 FRC_NORMAL,
525 FRC_ITALIC,
526 FRC_BOLD,
527 FRC_ITALICBOLD
528 };
529
530 typedef struct {
531 XftFont *font;
532 int flags;
533 long unicodep;
534 } Fontcache;
535
536 /* Fontcache is an array now. A new font will be appended to the array. */
537 static Fontcache frc[16];
538 static int frclen = 0;
539
540 ssize_t
541 xwrite(int fd, const char *s, size_t len) {
542 size_t aux = len;
543
544 while(len > 0) {
545 ssize_t r = write(fd, s, len);
546 if(r < 0)
547 return r;
548 len -= r;
549 s += r;
550 }
551 return aux;
552 }
553
554 void *
555 xmalloc(size_t len) {
556 void *p = malloc(len);
557
558 if(!p)
559 die("Out of memory\n");
560
561 return p;
562 }
563
564 void *
565 xrealloc(void *p, size_t len) {
566 if((p = realloc(p, len)) == NULL)
567 die("Out of memory\n");
568
569 return p;
570 }
571
572 char *
573 xstrdup(char *s) {
574 if((s = strdup(s)) == NULL)
575 die("Out of memory\n");
576
577 return s;
578 }
579
580 size_t
581 utf8decode(char *c, long *u, size_t clen) {
582 size_t i, j, len, type;
583 long udecoded;
584
585 *u = UTF_INVALID;
586 if(!clen)
587 return 0;
588 udecoded = utf8decodebyte(c[0], &len);
589 if(!BETWEEN(len, 1, UTF_SIZ))
590 return 1;
591 for(i = 1, j = 1; i < clen && j < len; ++i, ++j) {
592 udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
593 if(type != 0)
594 return j;
595 }
596 if(j < len)
597 return 0;
598 *u = udecoded;
599 utf8validate(u, len);
600 return len;
601 }
602
603 long
604 utf8decodebyte(char c, size_t *i) {
605 for(*i = 0; *i < LEN(utfmask); ++(*i))
606 if(((uchar)c & utfmask[*i]) == utfbyte[*i])
607 return (uchar)c & ~utfmask[*i];
608 return 0;
609 }
610
611 size_t
612 utf8encode(long u, char *c, size_t clen) {
613 size_t len, i;
614
615 len = utf8validate(&u, 0);
616 if(clen < len)
617 return 0;
618 for(i = len - 1; i != 0; --i) {
619 c[i] = utf8encodebyte(u, 0);
620 u >>= 6;
621 }
622 c[0] = utf8encodebyte(u, len);
623 return len;
624 }
625
626 char
627 utf8encodebyte(long u, size_t i) {
628 return utfbyte[i] | (u & ~utfmask[i]);
629 }
630
631 size_t
632 utf8len(char *c) {
633 return utf8decode(c, &(long){0}, UTF_SIZ);
634 }
635
636 size_t
637 utf8validate(long *u, size_t i) {
638 if(!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF))
639 *u = UTF_INVALID;
640 for(i = 1; *u > utfmax[i]; ++i)
641 ;
642 return i;
643 }
644
645 void
646 selinit(void) {
647 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
648 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
649 sel.mode = 0;
650 sel.ob.x = -1;
651 sel.primary = NULL;
652 sel.clipboard = NULL;
653 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
654 if(sel.xtarget == None)
655 sel.xtarget = XA_STRING;
656 }
657
658 int
659 x2col(int x) {
660 x -= borderpx;
661 x /= xw.cw;
662
663 return LIMIT(x, 0, term.col-1);
664 }
665
666 int
667 y2row(int y) {
668 y -= borderpx;
669 y /= xw.ch;
670
671 return LIMIT(y, 0, term.row-1);
672 }
673
674 int tlinelen(int y) {
675 int i = term.col;
676
677 if(term.line[y][i - 1].mode & ATTR_WRAP)
678 return i;
679
680 while(i > 0 && term.line[y][i - 1].c[0] == ' ')
681 --i;
682
683 return i;
684 }
685
686 void
687 selnormalize(void) {
688 int i;
689
690 if(sel.ob.y == sel.oe.y || sel.type == SEL_RECTANGULAR) {
691 sel.nb.x = MIN(sel.ob.x, sel.oe.x);
692 sel.ne.x = MAX(sel.ob.x, sel.oe.x);
693 } else {
694 sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
695 sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
696 }
697 sel.nb.y = MIN(sel.ob.y, sel.oe.y);
698 sel.ne.y = MAX(sel.ob.y, sel.oe.y);
699
700 selsnap(sel.snap, &sel.nb.x, &sel.nb.y, -1);
701 selsnap(sel.snap, &sel.ne.x, &sel.ne.y, +1);
702
703 /* expand selection over line breaks */
704 if (sel.type == SEL_RECTANGULAR)
705 return;
706 i = tlinelen(sel.nb.y);
707 if (i < sel.nb.x)
708 sel.nb.x = i;
709 if (tlinelen(sel.ne.y) <= sel.ne.x)
710 sel.ne.x = term.col - 1;
711 }
712
713 bool
714 selected(int x, int y) {
715 if(sel.type == SEL_RECTANGULAR)
716 return BETWEEN(y, sel.nb.y, sel.ne.y)
717 && BETWEEN(x, sel.nb.x, sel.ne.x);
718
719 return BETWEEN(y, sel.nb.y, sel.ne.y)
720 && (y != sel.nb.y || x >= sel.nb.x)
721 && (y != sel.ne.y || x <= sel.ne.x);
722 }
723
724 void
725 selsnap(int mode, int *x, int *y, int direction) {
726 int newx, newy, xt, yt;
727 bool delim, prevdelim;
728 Glyph *gp, *prevgp;
729
730 switch(mode) {
731 case SNAP_WORD:
732 /*
733 * Snap around if the word wraps around at the end or
734 * beginning of a line.
735 */
736 prevgp = &term.line[*y][*x];
737 prevdelim = strchr(worddelimiters, prevgp->c[0]) != NULL;
738 for(;;) {
739 newx = *x + direction;
740 newy = *y;
741 if(!BETWEEN(newx, 0, term.col - 1)) {
742 newy += direction;
743 newx = (newx + term.col) % term.col;
744 if (!BETWEEN(newy, 0, term.row - 1))
745 break;
746
747 if(direction > 0)
748 yt = *y, xt = *x;
749 else
750 yt = newy, xt = newx;
751 if(!(term.line[yt][xt].mode & ATTR_WRAP))
752 break;
753 }
754
755 if (newx >= tlinelen(newy))
756 break;
757
758 gp = &term.line[newy][newx];
759 delim = strchr(worddelimiters, gp->c[0]) != NULL;
760 if(!(gp->mode & ATTR_WDUMMY) && (delim != prevdelim
761 || (delim && gp->c[0] != prevgp->c[0])))
762 break;
763
764 *x = newx;
765 *y = newy;
766 prevgp = gp;
767 prevdelim = delim;
768 }
769 break;
770 case SNAP_LINE:
771 /*
772 * Snap around if the the previous line or the current one
773 * has set ATTR_WRAP at its end. Then the whole next or
774 * previous line will be selected.
775 */
776 *x = (direction < 0) ? 0 : term.col - 1;
777 if(direction < 0 && *y > 0) {
778 for(; *y > 0; *y += direction) {
779 if(!(term.line[*y-1][term.col-1].mode
780 & ATTR_WRAP)) {
781 break;
782 }
783 }
784 } else if(direction > 0 && *y < term.row-1) {
785 for(; *y < term.row; *y += direction) {
786 if(!(term.line[*y][term.col-1].mode
787 & ATTR_WRAP)) {
788 break;
789 }
790 }
791 }
792 break;
793 }
794 }
795
796 void
797 getbuttoninfo(XEvent *e) {
798 int type;
799 uint state = e->xbutton.state & ~(Button1Mask | forceselmod);
800
801 sel.alt = IS_SET(MODE_ALTSCREEN);
802
803 sel.oe.x = x2col(e->xbutton.x);
804 sel.oe.y = y2row(e->xbutton.y);
805 selnormalize();
806
807 sel.type = SEL_REGULAR;
808 for(type = 1; type < LEN(selmasks); ++type) {
809 if(match(selmasks[type], state)) {
810 sel.type = type;
811 break;
812 }
813 }
814 }
815
816 void
817 mousereport(XEvent *e) {
818 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
819 button = e->xbutton.button, state = e->xbutton.state,
820 len;
821 char buf[40];
822 static int ox, oy;
823
824 /* from urxvt */
825 if(e->xbutton.type == MotionNotify) {
826 if(x == ox && y == oy)
827 return;
828 if(!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
829 return;
830 /* MOUSE_MOTION: no reporting if no button is pressed */
831 if(IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
832 return;
833
834 button = oldbutton + 32;
835 ox = x;
836 oy = y;
837 } else {
838 if(!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
839 button = 3;
840 } else {
841 button -= Button1;
842 if(button >= 3)
843 button += 64 - 3;
844 }
845 if(e->xbutton.type == ButtonPress) {
846 oldbutton = button;
847 ox = x;
848 oy = y;
849 } else if(e->xbutton.type == ButtonRelease) {
850 oldbutton = 3;
851 /* MODE_MOUSEX10: no button release reporting */
852 if(IS_SET(MODE_MOUSEX10))
853 return;
854 if (button == 64 || button == 65)
855 return;
856 }
857 }
858
859 if(!IS_SET(MODE_MOUSEX10)) {
860 button += (state & ShiftMask ? 4 : 0)
861 + (state & Mod4Mask ? 8 : 0)
862 + (state & ControlMask ? 16 : 0);
863 }
864
865 len = 0;
866 if(IS_SET(MODE_MOUSESGR)) {
867 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
868 button, x+1, y+1,
869 e->xbutton.type == ButtonRelease ? 'm' : 'M');
870 } else if(x < 223 && y < 223) {
871 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
872 32+button, 32+x+1, 32+y+1);
873 } else {
874 return;
875 }
876
877 ttywrite(buf, len);
878 }
879
880 void
881 bpress(XEvent *e) {
882 struct timespec now;
883 Mousekey *mk;
884
885 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
886 mousereport(e);
887 return;
888 }
889
890 for(mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
891 if(e->xbutton.button == mk->b
892 && match(mk->mask, e->xbutton.state)) {
893 ttysend(mk->s, strlen(mk->s));
894 return;
895 }
896 }
897
898 if(e->xbutton.button == Button1) {
899 clock_gettime(CLOCK_MONOTONIC, &now);
900
901 /* Clear previous selection, logically and visually. */
902 selclear(NULL);
903 sel.mode = 1;
904 sel.type = SEL_REGULAR;
905 sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
906 sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
907
908 /*
909 * If the user clicks below predefined timeouts specific
910 * snapping behaviour is exposed.
911 */
912 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
913 sel.snap = SNAP_LINE;
914 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
915 sel.snap = SNAP_WORD;
916 } else {
917 sel.snap = 0;
918 }
919 selnormalize();
920
921 /*
922 * Draw selection, unless it's regular and we don't want to
923 * make clicks visible
924 */
925 if(sel.snap != 0) {
926 sel.mode++;
927 tsetdirt(sel.nb.y, sel.ne.y);
928 }
929 sel.tclick2 = sel.tclick1;
930 sel.tclick1 = now;
931 }
932 }
933
934 char *
935 getsel(void) {
936 char *str, *ptr;
937 int y, bufsize, size, lastx, linelen;
938 Glyph *gp, *last;
939
940 if(sel.ob.x == -1)
941 return NULL;
942
943 bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
944 ptr = str = xmalloc(bufsize);
945
946 /* append every set & selected glyph to the selection */
947 for(y = sel.nb.y; y <= sel.ne.y; y++) {
948 linelen = tlinelen(y);
949
950 if(sel.type == SEL_RECTANGULAR) {
951 gp = &term.line[y][sel.nb.x];
952 lastx = sel.ne.x;
953 } else {
954 gp = &term.line[y][sel.nb.y == y ? sel.nb.x : 0];
955 lastx = (sel.ne.y == y) ? sel.ne.x : term.col-1;
956 }
957 last = &term.line[y][MIN(lastx, linelen-1)];
958 while(last >= gp && last->c[0] == ' ')
959 --last;
960
961 for( ; gp <= last; ++gp) {
962 if(gp->mode & ATTR_WDUMMY)
963 continue;
964
965 size = utf8len(gp->c);
966 memcpy(ptr, gp->c, size);
967 ptr += size;
968 }
969
970 /*
971 * Copy and pasting of line endings is inconsistent
972 * in the inconsistent terminal and GUI world.
973 * The best solution seems like to produce '\n' when
974 * something is copied from st and convert '\n' to
975 * '\r', when something to be pasted is received by
976 * st.
977 * FIXME: Fix the computer world.
978 */
979 if((y < sel.ne.y || lastx >= linelen) && !(last->mode & ATTR_WRAP))
980 *ptr++ = '\n';
981 }
982 *ptr = 0;
983 return str;
984 }
985
986 void
987 selcopy(void) {
988 xsetsel(getsel());
989 }
990
991 void
992 selnotify(XEvent *e) {
993 ulong nitems, ofs, rem;
994 int format;
995 uchar *data, *last, *repl;
996 Atom type;
997 XSelectionEvent *xsev;
998
999 ofs = 0;
1000 xsev = (XSelectionEvent *)e;
1001 if (xsev->property == None)
1002 return;
1003 do {
1004 if(XGetWindowProperty(xw.dpy, xw.win, xsev->property, ofs,
1005 BUFSIZ/4, False, AnyPropertyType,
1006 &type, &format, &nitems, &rem,
1007 &data)) {
1008 fprintf(stderr, "Clipboard allocation failed\n");
1009 return;
1010 }
1011
1012 /*
1013 * As seen in getsel:
1014 * Line endings are inconsistent in the terminal and GUI world
1015 * copy and pasting. When receiving some selection data,
1016 * replace all '\n' with '\r'.
1017 * FIXME: Fix the computer world.
1018 */
1019 repl = data;
1020 last = data + nitems * format / 8;
1021 while((repl = memchr(repl, '\n', last - repl))) {
1022 *repl++ = '\r';
1023 }
1024
1025 if(IS_SET(MODE_BRCKTPASTE))
1026 ttywrite("\033[200~", 6);
1027 ttysend((char *)data, nitems * format / 8);
1028 if(IS_SET(MODE_BRCKTPASTE))
1029 ttywrite("\033[201~", 6);
1030 XFree(data);
1031 /* number of 32-bit chunks returned */
1032 ofs += nitems * format / 32;
1033 } while(rem > 0);
1034 }
1035
1036 void
1037 selpaste(const Arg *dummy) {
1038 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
1039 xw.win, CurrentTime);
1040 }
1041
1042 void
1043 clipcopy(const Arg *dummy) {
1044 Atom clipboard;
1045
1046 if(sel.clipboard != NULL)
1047 free(sel.clipboard);
1048
1049 if(sel.primary != NULL) {
1050 sel.clipboard = xstrdup(sel.primary);
1051 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1052 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
1053 }
1054 }
1055
1056 void
1057 clippaste(const Arg *dummy) {
1058 Atom clipboard;
1059
1060 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1061 XConvertSelection(xw.dpy, clipboard, sel.xtarget, clipboard,
1062 xw.win, CurrentTime);
1063 }
1064
1065 void
1066 selclear(XEvent *e) {
1067 if(sel.ob.x == -1)
1068 return;
1069 sel.ob.x = -1;
1070 tsetdirt(sel.nb.y, sel.ne.y);
1071 }
1072
1073 void
1074 selrequest(XEvent *e) {
1075 XSelectionRequestEvent *xsre;
1076 XSelectionEvent xev;
1077 Atom xa_targets, string, clipboard;
1078 char *seltext;
1079
1080 xsre = (XSelectionRequestEvent *) e;
1081 xev.type = SelectionNotify;
1082 xev.requestor = xsre->requestor;
1083 xev.selection = xsre->selection;
1084 xev.target = xsre->target;
1085 xev.time = xsre->time;
1086 /* reject */
1087 xev.property = None;
1088
1089 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
1090 if(xsre->target == xa_targets) {
1091 /* respond with the supported type */
1092 string = sel.xtarget;
1093 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1094 XA_ATOM, 32, PropModeReplace,
1095 (uchar *) &string, 1);
1096 xev.property = xsre->property;
1097 } else if(xsre->target == sel.xtarget || xsre->target == XA_STRING) {
1098 /*
1099 * xith XA_STRING non ascii characters may be incorrect in the
1100 * requestor. It is not our problem, use utf8.
1101 */
1102 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1103 if(xsre->selection == XA_PRIMARY) {
1104 seltext = sel.primary;
1105 } else if(xsre->selection == clipboard) {
1106 seltext = sel.clipboard;
1107 } else {
1108 fprintf(stderr,
1109 "Unhandled clipboard selection 0x%lx\n",
1110 xsre->selection);
1111 return;
1112 }
1113 if(seltext != NULL) {
1114 XChangeProperty(xsre->display, xsre->requestor,
1115 xsre->property, xsre->target,
1116 8, PropModeReplace,
1117 (uchar *)seltext, strlen(seltext));
1118 xev.property = xsre->property;
1119 }
1120 }
1121
1122 /* all done, send a notification to the listener */
1123 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
1124 fprintf(stderr, "Error sending SelectionNotify event\n");
1125 }
1126
1127 void
1128 xsetsel(char *str) {
1129 free(sel.primary);
1130 sel.primary = str;
1131
1132 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
1133 }
1134
1135 void
1136 brelease(XEvent *e) {
1137 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1138 mousereport(e);
1139 return;
1140 }
1141
1142 if(e->xbutton.button == Button2) {
1143 selpaste(NULL);
1144 } else if(e->xbutton.button == Button1) {
1145 if(sel.mode < 2) {
1146 selclear(NULL);
1147 } else {
1148 getbuttoninfo(e);
1149 selcopy();
1150 }
1151 sel.mode = 0;
1152 tsetdirt(sel.nb.y, sel.ne.y);
1153 }
1154 }
1155
1156 void
1157 bmotion(XEvent *e) {
1158 int oldey, oldex, oldsby, oldsey;
1159
1160 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1161 mousereport(e);
1162 return;
1163 }
1164
1165 if(!sel.mode)
1166 return;
1167
1168 sel.mode++;
1169 oldey = sel.oe.y;
1170 oldex = sel.oe.x;
1171 oldsby = sel.nb.y;
1172 oldsey = sel.ne.y;
1173 getbuttoninfo(e);
1174
1175 if(oldey != sel.oe.y || oldex != sel.oe.x)
1176 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
1177 }
1178
1179 void
1180 die(const char *errstr, ...) {
1181 va_list ap;
1182
1183 va_start(ap, errstr);
1184 vfprintf(stderr, errstr, ap);
1185 va_end(ap);
1186 exit(EXIT_FAILURE);
1187 }
1188
1189 void
1190 execsh(void) {
1191 char **args, *sh, *prog;
1192 const struct passwd *pw;
1193 char buf[sizeof(long) * 8 + 1];
1194
1195 errno = 0;
1196 if((pw = getpwuid(getuid())) == NULL) {
1197 if(errno)
1198 die("getpwuid:%s\n", strerror(errno));
1199 else
1200 die("who are you?\n");
1201 }
1202
1203 if (!(sh = getenv("SHELL"))) {
1204 sh = (pw->pw_shell[0]) ? pw->pw_shell : shell;
1205 }
1206
1207 if(opt_cmd)
1208 prog = opt_cmd[0];
1209 else if(utmp)
1210 prog = utmp;
1211 else
1212 prog = sh;
1213 args = (opt_cmd) ? opt_cmd : (char *[]) {prog, NULL};
1214
1215 snprintf(buf, sizeof(buf), "%lu", xw.win);
1216
1217 unsetenv("COLUMNS");
1218 unsetenv("LINES");
1219 unsetenv("TERMCAP");
1220 setenv("LOGNAME", pw->pw_name, 1);
1221 setenv("USER", pw->pw_name, 1);
1222 setenv("SHELL", sh, 1);
1223 setenv("HOME", pw->pw_dir, 1);
1224 setenv("TERM", termname, 1);
1225 setenv("WINDOWID", buf, 1);
1226
1227 signal(SIGCHLD, SIG_DFL);
1228 signal(SIGHUP, SIG_DFL);
1229 signal(SIGINT, SIG_DFL);
1230 signal(SIGQUIT, SIG_DFL);
1231 signal(SIGTERM, SIG_DFL);
1232 signal(SIGALRM, SIG_DFL);
1233
1234 execvp(prog, args);
1235 _exit(EXIT_FAILURE);
1236 }
1237
1238 void
1239 sigchld(int a) {
1240 int stat, ret;
1241
1242 if(waitpid(pid, &stat, 0) < 0)
1243 die("Waiting for pid %hd failed: %s\n", pid, strerror(errno));
1244
1245 ret = WIFEXITED(stat) ? WEXITSTATUS(stat) : EXIT_FAILURE;
1246 if (ret != EXIT_SUCCESS)
1247 die("child finished with error '%d'\n", stat);
1248 exit(EXIT_SUCCESS);
1249 }
1250
1251 void
1252 ttynew(void) {
1253 int m, s;
1254 struct winsize w = {term.row, term.col, 0, 0};
1255
1256 /* seems to work fine on linux, openbsd and freebsd */
1257 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1258 die("openpty failed: %s\n", strerror(errno));
1259
1260 switch(pid = fork()) {
1261 case -1:
1262 die("fork failed\n");
1263 break;
1264 case 0:
1265 setsid(); /* create a new process group */
1266 dup2(s, STDIN_FILENO);
1267 dup2(s, STDOUT_FILENO);
1268 dup2(s, STDERR_FILENO);
1269 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1270 die("ioctl TIOCSCTTY failed: %s\n", strerror(errno));
1271 close(s);
1272 close(m);
1273 execsh();
1274 break;
1275 default:
1276 close(s);
1277 cmdfd = m;
1278 signal(SIGCHLD, sigchld);
1279 if(opt_io) {
1280 term.mode |= MODE_PRINT;
1281 iofd = (!strcmp(opt_io, "-")) ?
1282 STDOUT_FILENO :
1283 open(opt_io, O_WRONLY | O_CREAT, 0666);
1284 if(iofd < 0) {
1285 fprintf(stderr, "Error opening %s:%s\n",
1286 opt_io, strerror(errno));
1287 }
1288 }
1289 break;
1290 }
1291 }
1292
1293 void
1294 ttyread(void) {
1295 static char buf[BUFSIZ];
1296 static int buflen = 0;
1297 char *ptr;
1298 char s[UTF_SIZ];
1299 int charsize; /* size of utf8 char in bytes */
1300 long unicodep;
1301 int ret;
1302
1303 /* append read bytes to unprocessed bytes */
1304 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1305 die("Couldn't read from shell: %s\n", strerror(errno));
1306
1307 /* process every complete utf8 char */
1308 buflen += ret;
1309 ptr = buf;
1310 while((charsize = utf8decode(ptr, &unicodep, buflen))) {
1311 utf8encode(unicodep, s, UTF_SIZ);
1312 tputc(s, charsize);
1313 ptr += charsize;
1314 buflen -= charsize;
1315 }
1316
1317 /* keep any uncomplete utf8 char for the next call */
1318 memmove(buf, ptr, buflen);
1319 }
1320
1321 void
1322 ttywrite(const char *s, size_t n) {
1323 if(xwrite(cmdfd, s, n) == -1)
1324 die("write error on tty: %s\n", strerror(errno));
1325 }
1326
1327 void
1328 ttysend(char *s, size_t n) {
1329 ttywrite(s, n);
1330 if(IS_SET(MODE_ECHO))
1331 techo(s, n);
1332 }
1333
1334 void
1335 ttyresize(void) {
1336 struct winsize w;
1337
1338 w.ws_row = term.row;
1339 w.ws_col = term.col;
1340 w.ws_xpixel = xw.tw;
1341 w.ws_ypixel = xw.th;
1342 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1343 fprintf(stderr, "Couldn't set window size: %s\n", strerror(errno));
1344 }
1345
1346 int
1347 tattrset(int attr) {
1348 int i, j;
1349
1350 for(i = 0; i < term.row-1; i++) {
1351 for(j = 0; j < term.col-1; j++) {
1352 if(term.line[i][j].mode & attr)
1353 return 1;
1354 }
1355 }
1356
1357 return 0;
1358 }
1359
1360 void
1361 tsetdirt(int top, int bot) {
1362 int i;
1363
1364 LIMIT(top, 0, term.row-1);
1365 LIMIT(bot, 0, term.row-1);
1366
1367 for(i = top; i <= bot; i++)
1368 term.dirty[i] = 1;
1369 }
1370
1371 void
1372 tsetdirtattr(int attr) {
1373 int i, j;
1374
1375 for(i = 0; i < term.row-1; i++) {
1376 for(j = 0; j < term.col-1; j++) {
1377 if(term.line[i][j].mode & attr) {
1378 tsetdirt(i, i);
1379 break;
1380 }
1381 }
1382 }
1383 }
1384
1385 void
1386 tfulldirt(void) {
1387 tsetdirt(0, term.row-1);
1388 }
1389
1390 void
1391 tcursor(int mode) {
1392 static TCursor c[2];
1393 bool alt = IS_SET(MODE_ALTSCREEN);
1394
1395 if(mode == CURSOR_SAVE) {
1396 c[alt] = term.c;
1397 } else if(mode == CURSOR_LOAD) {
1398 term.c = c[alt];
1399 tmoveto(c[alt].x, c[alt].y);
1400 }
1401 }
1402
1403 void
1404 treset(void) {
1405 uint i;
1406
1407 term.c = (TCursor){{
1408 .mode = ATTR_NULL,
1409 .fg = defaultfg,
1410 .bg = defaultbg
1411 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1412
1413 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1414 for(i = tabspaces; i < term.col; i += tabspaces)
1415 term.tabs[i] = 1;
1416 term.top = 0;
1417 term.bot = term.row - 1;
1418 term.mode = MODE_WRAP;
1419 memset(term.trantbl, sizeof(term.trantbl), CS_USA);
1420 term.charset = 0;
1421
1422 for(i = 0; i < 2; i++) {
1423 tmoveto(0, 0);
1424 tcursor(CURSOR_SAVE);
1425 tclearregion(0, 0, term.col-1, term.row-1);
1426 tswapscreen();
1427 }
1428 }
1429
1430 void
1431 tnew(int col, int row) {
1432 term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } };
1433 tresize(col, row);
1434 term.numlock = 1;
1435
1436 treset();
1437 }
1438
1439 void
1440 tswapscreen(void) {
1441 Line *tmp = term.line;
1442
1443 term.line = term.alt;
1444 term.alt = tmp;
1445 term.mode ^= MODE_ALTSCREEN;
1446 tfulldirt();
1447 }
1448
1449 void
1450 tscrolldown(int orig, int n) {
1451 int i;
1452 Line temp;
1453
1454 LIMIT(n, 0, term.bot-orig+1);
1455
1456 tsetdirt(orig, term.bot-n);
1457 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1458
1459 for(i = term.bot; i >= orig+n; i--) {
1460 temp = term.line[i];
1461 term.line[i] = term.line[i-n];
1462 term.line[i-n] = temp;
1463 }
1464
1465 selscroll(orig, n);
1466 }
1467
1468 void
1469 tscrollup(int orig, int n) {
1470 int i;
1471 Line temp;
1472
1473 LIMIT(n, 0, term.bot-orig+1);
1474
1475 tclearregion(0, orig, term.col-1, orig+n-1);
1476 tsetdirt(orig+n, term.bot);
1477
1478 for(i = orig; i <= term.bot-n; i++) {
1479 temp = term.line[i];
1480 term.line[i] = term.line[i+n];
1481 term.line[i+n] = temp;
1482 }
1483
1484 selscroll(orig, -n);
1485 }
1486
1487 void
1488 selscroll(int orig, int n) {
1489 if(sel.ob.x == -1)
1490 return;
1491
1492 if(BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
1493 if((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
1494 selclear(NULL);
1495 return;
1496 }
1497 if(sel.type == SEL_RECTANGULAR) {
1498 if(sel.ob.y < term.top)
1499 sel.ob.y = term.top;
1500 if(sel.oe.y > term.bot)
1501 sel.oe.y = term.bot;
1502 } else {
1503 if(sel.ob.y < term.top) {
1504 sel.ob.y = term.top;
1505 sel.ob.x = 0;
1506 }
1507 if(sel.oe.y > term.bot) {
1508 sel.oe.y = term.bot;
1509 sel.oe.x = term.col;
1510 }
1511 }
1512 selnormalize();
1513 }
1514 }
1515
1516 void
1517 tnewline(int first_col) {
1518 int y = term.c.y;
1519
1520 if(y == term.bot) {
1521 tscrollup(term.top, 1);
1522 } else {
1523 y++;
1524 }
1525 tmoveto(first_col ? 0 : term.c.x, y);
1526 }
1527
1528 void
1529 csiparse(void) {
1530 char *p = csiescseq.buf, *np;
1531 long int v;
1532
1533 csiescseq.narg = 0;
1534 if(*p == '?') {
1535 csiescseq.priv = 1;
1536 p++;
1537 }
1538
1539 csiescseq.buf[csiescseq.len] = '\0';
1540 while(p < csiescseq.buf+csiescseq.len) {
1541 np = NULL;
1542 v = strtol(p, &np, 10);
1543 if(np == p)
1544 v = 0;
1545 if(v == LONG_MAX || v == LONG_MIN)
1546 v = -1;
1547 csiescseq.arg[csiescseq.narg++] = v;
1548 p = np;
1549 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1550 break;
1551 p++;
1552 }
1553 csiescseq.mode[0] = *p++;
1554 csiescseq.mode[1] = (p < csiescseq.buf+csiescseq.len) ? *p : '\0';
1555 }
1556
1557 /* for absolute user moves, when decom is set */
1558 void
1559 tmoveato(int x, int y) {
1560 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1561 }
1562
1563 void
1564 tmoveto(int x, int y) {
1565 int miny, maxy;
1566
1567 if(term.c.state & CURSOR_ORIGIN) {
1568 miny = term.top;
1569 maxy = term.bot;
1570 } else {
1571 miny = 0;
1572 maxy = term.row - 1;
1573 }
1574 term.c.state &= ~CURSOR_WRAPNEXT;
1575 term.c.x = LIMIT(x, 0, term.col-1);
1576 term.c.y = LIMIT(y, miny, maxy);
1577 }
1578
1579 void
1580 tsetchar(char *c, Glyph *attr, int x, int y) {
1581 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1582 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1583 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1584 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1585 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1586 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1587 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1588 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1589 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1590 };
1591
1592 /*
1593 * The table is proudly stolen from rxvt.
1594 */
1595 if(term.trantbl[term.charset] == CS_GRAPHIC0) {
1596 if(BETWEEN(c[0], 0x41, 0x7e) && vt100_0[c[0] - 0x41]) {
1597 c = vt100_0[c[0] - 0x41];
1598 }
1599 }
1600
1601 if(term.line[y][x].mode & ATTR_WIDE) {
1602 if(x+1 < term.col) {
1603 term.line[y][x+1].c[0] = ' ';
1604 term.line[y][x+1].mode &= ~ATTR_WDUMMY;
1605 }
1606 } else if(term.line[y][x].mode & ATTR_WDUMMY) {
1607 term.line[y][x-1].c[0] = ' ';
1608 term.line[y][x-1].mode &= ~ATTR_WIDE;
1609 }
1610
1611 term.dirty[y] = 1;
1612 term.line[y][x] = *attr;
1613 memcpy(term.line[y][x].c, c, UTF_SIZ);
1614 }
1615
1616 void
1617 tclearregion(int x1, int y1, int x2, int y2) {
1618 int x, y, temp;
1619 Glyph *gp;
1620
1621 if(x1 > x2)
1622 temp = x1, x1 = x2, x2 = temp;
1623 if(y1 > y2)
1624 temp = y1, y1 = y2, y2 = temp;
1625
1626 LIMIT(x1, 0, term.col-1);
1627 LIMIT(x2, 0, term.col-1);
1628 LIMIT(y1, 0, term.row-1);
1629 LIMIT(y2, 0, term.row-1);
1630
1631 for(y = y1; y <= y2; y++) {
1632 term.dirty[y] = 1;
1633 for(x = x1; x <= x2; x++) {
1634 gp = &term.line[y][x];
1635 if(selected(x, y))
1636 selclear(NULL);
1637 gp->fg = term.c.attr.fg;
1638 gp->bg = term.c.attr.bg;
1639 gp->mode = 0;
1640 memcpy(gp->c, " ", 2);
1641 }
1642 }
1643 }
1644
1645 void
1646 tdeletechar(int n) {
1647 int dst, src, size;
1648 Glyph *line;
1649
1650 LIMIT(n, 0, term.col - term.c.x);
1651
1652 dst = term.c.x;
1653 src = term.c.x + n;
1654 size = term.col - src;
1655 line = term.line[term.c.y];
1656
1657 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1658 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1659 }
1660
1661 void
1662 tinsertblank(int n) {
1663 int dst, src, size;
1664 Glyph *line;
1665
1666 LIMIT(n, 0, term.col - term.c.x);
1667
1668 dst = term.c.x + n;
1669 src = term.c.x;
1670 size = term.col - dst;
1671 line = term.line[term.c.y];
1672
1673 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1674 tclearregion(src, term.c.y, dst - 1, term.c.y);
1675 }
1676
1677 void
1678 tinsertblankline(int n) {
1679 if(BETWEEN(term.c.y, term.top, term.bot))
1680 tscrolldown(term.c.y, n);
1681 }
1682
1683 void
1684 tdeleteline(int n) {
1685 if(BETWEEN(term.c.y, term.top, term.bot))
1686 tscrollup(term.c.y, n);
1687 }
1688
1689 int32_t
1690 tdefcolor(int *attr, int *npar, int l) {
1691 int32_t idx = -1;
1692 uint r, g, b;
1693
1694 switch (attr[*npar + 1]) {
1695 case 2: /* direct color in RGB space */
1696 if (*npar + 4 >= l) {
1697 fprintf(stderr,
1698 "erresc(38): Incorrect number of parameters (%d)\n",
1699 *npar);
1700 break;
1701 }
1702 r = attr[*npar + 2];
1703 g = attr[*npar + 3];
1704 b = attr[*npar + 4];
1705 *npar += 4;
1706 if(!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
1707 fprintf(stderr, "erresc: bad rgb color (%d,%d,%d)\n",
1708 r, g, b);
1709 else
1710 idx = TRUECOLOR(r, g, b);
1711 break;
1712 case 5: /* indexed color */
1713 if (*npar + 2 >= l) {
1714 fprintf(stderr,
1715 "erresc(38): Incorrect number of parameters (%d)\n",
1716 *npar);
1717 break;
1718 }
1719 *npar += 2;
1720 if(!BETWEEN(attr[*npar], 0, 255))
1721 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
1722 else
1723 idx = attr[*npar];
1724 break;
1725 case 0: /* implemented defined (only foreground) */
1726 case 1: /* transparent */
1727 case 3: /* direct color in CMY space */
1728 case 4: /* direct color in CMYK space */
1729 default:
1730 fprintf(stderr,
1731 "erresc(38): gfx attr %d unknown\n", attr[*npar]);
1732 break;
1733 }
1734
1735 return idx;
1736 }
1737
1738 void
1739 tsetattr(int *attr, int l) {
1740 int i;
1741 int32_t idx;
1742
1743 for(i = 0; i < l; i++) {
1744 switch(attr[i]) {
1745 case 0:
1746 term.c.attr.mode &= ~(
1747 ATTR_BOLD |
1748 ATTR_FAINT |
1749 ATTR_ITALIC |
1750 ATTR_UNDERLINE |
1751 ATTR_BLINK |
1752 ATTR_REVERSE |
1753 ATTR_INVISIBLE |
1754 ATTR_STRUCK );
1755 term.c.attr.fg = defaultfg;
1756 term.c.attr.bg = defaultbg;
1757 break;
1758 case 1:
1759 term.c.attr.mode |= ATTR_BOLD;
1760 break;
1761 case 2:
1762 term.c.attr.mode |= ATTR_FAINT;
1763 break;
1764 case 3:
1765 term.c.attr.mode |= ATTR_ITALIC;
1766 break;
1767 case 4:
1768 term.c.attr.mode |= ATTR_UNDERLINE;
1769 break;
1770 case 5: /* slow blink */
1771 /* FALLTHROUGH */
1772 case 6: /* rapid blink */
1773 term.c.attr.mode |= ATTR_BLINK;
1774 break;
1775 case 7:
1776 term.c.attr.mode |= ATTR_REVERSE;
1777 break;
1778 case 8:
1779 term.c.attr.mode |= ATTR_INVISIBLE;
1780 break;
1781 case 9:
1782 term.c.attr.mode |= ATTR_STRUCK;
1783 break;
1784 case 22:
1785 term.c.attr.mode &= ~(ATTR_BOLD | ATTR_FAINT);
1786 break;
1787 case 23:
1788 term.c.attr.mode &= ~ATTR_ITALIC;
1789 break;
1790 case 24:
1791 term.c.attr.mode &= ~ATTR_UNDERLINE;
1792 break;
1793 case 25:
1794 term.c.attr.mode &= ~ATTR_BLINK;
1795 break;
1796 case 27:
1797 term.c.attr.mode &= ~ATTR_REVERSE;
1798 break;
1799 case 28:
1800 term.c.attr.mode &= ~ATTR_INVISIBLE;
1801 break;
1802 case 29:
1803 term.c.attr.mode &= ~ATTR_STRUCK;
1804 break;
1805 case 38:
1806 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1807 term.c.attr.fg = idx;
1808 break;
1809 case 39:
1810 term.c.attr.fg = defaultfg;
1811 break;
1812 case 48:
1813 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1814 term.c.attr.bg = idx;
1815 break;
1816 case 49:
1817 term.c.attr.bg = defaultbg;
1818 break;
1819 default:
1820 if(BETWEEN(attr[i], 30, 37)) {
1821 term.c.attr.fg = attr[i] - 30;
1822 } else if(BETWEEN(attr[i], 40, 47)) {
1823 term.c.attr.bg = attr[i] - 40;
1824 } else if(BETWEEN(attr[i], 90, 97)) {
1825 term.c.attr.fg = attr[i] - 90 + 8;
1826 } else if(BETWEEN(attr[i], 100, 107)) {
1827 term.c.attr.bg = attr[i] - 100 + 8;
1828 } else {
1829 fprintf(stderr,
1830 "erresc(default): gfx attr %d unknown\n",
1831 attr[i]), csidump();
1832 }
1833 break;
1834 }
1835 }
1836 }
1837
1838 void
1839 tsetscroll(int t, int b) {
1840 int temp;
1841
1842 LIMIT(t, 0, term.row-1);
1843 LIMIT(b, 0, term.row-1);
1844 if(t > b) {
1845 temp = t;
1846 t = b;
1847 b = temp;
1848 }
1849 term.top = t;
1850 term.bot = b;
1851 }
1852
1853 void
1854 tsetmode(bool priv, bool set, int *args, int narg) {
1855 int *lim, mode;
1856 bool alt;
1857
1858 for(lim = args + narg; args < lim; ++args) {
1859 if(priv) {
1860 switch(*args) {
1861 case 1: /* DECCKM -- Cursor key */
1862 MODBIT(term.mode, set, MODE_APPCURSOR);
1863 break;
1864 case 5: /* DECSCNM -- Reverse video */
1865 mode = term.mode;
1866 MODBIT(term.mode, set, MODE_REVERSE);
1867 if(mode != term.mode)
1868 redraw();
1869 break;
1870 case 6: /* DECOM -- Origin */
1871 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1872 tmoveato(0, 0);
1873 break;
1874 case 7: /* DECAWM -- Auto wrap */
1875 MODBIT(term.mode, set, MODE_WRAP);
1876 break;
1877 case 0: /* Error (IGNORED) */
1878 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1879 case 3: /* DECCOLM -- Column (IGNORED) */
1880 case 4: /* DECSCLM -- Scroll (IGNORED) */
1881 case 8: /* DECARM -- Auto repeat (IGNORED) */
1882 case 18: /* DECPFF -- Printer feed (IGNORED) */
1883 case 19: /* DECPEX -- Printer extent (IGNORED) */
1884 case 42: /* DECNRCM -- National characters (IGNORED) */
1885 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1886 break;
1887 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1888 MODBIT(term.mode, !set, MODE_HIDE);
1889 break;
1890 case 9: /* X10 mouse compatibility mode */
1891 xsetpointermotion(0);
1892 MODBIT(term.mode, 0, MODE_MOUSE);
1893 MODBIT(term.mode, set, MODE_MOUSEX10);
1894 break;
1895 case 1000: /* 1000: report button press */
1896 xsetpointermotion(0);
1897 MODBIT(term.mode, 0, MODE_MOUSE);
1898 MODBIT(term.mode, set, MODE_MOUSEBTN);
1899 break;
1900 case 1002: /* 1002: report motion on button press */
1901 xsetpointermotion(0);
1902 MODBIT(term.mode, 0, MODE_MOUSE);
1903 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1904 break;
1905 case 1003: /* 1003: enable all mouse motions */
1906 xsetpointermotion(set);
1907 MODBIT(term.mode, 0, MODE_MOUSE);
1908 MODBIT(term.mode, set, MODE_MOUSEMANY);
1909 break;
1910 case 1004: /* 1004: send focus events to tty */
1911 MODBIT(term.mode, set, MODE_FOCUS);
1912 break;
1913 case 1006: /* 1006: extended reporting mode */
1914 MODBIT(term.mode, set, MODE_MOUSESGR);
1915 break;
1916 case 1034:
1917 MODBIT(term.mode, set, MODE_8BIT);
1918 break;
1919 case 1049: /* swap screen & set/restore cursor as xterm */
1920 if (!allowaltscreen)
1921 break;
1922 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1923 /* FALLTHROUGH */
1924 case 47: /* swap screen */
1925 case 1047:
1926 if (!allowaltscreen)
1927 break;
1928 alt = IS_SET(MODE_ALTSCREEN);
1929 if(alt) {
1930 tclearregion(0, 0, term.col-1,
1931 term.row-1);
1932 }
1933 if(set ^ alt) /* set is always 1 or 0 */
1934 tswapscreen();
1935 if(*args != 1049)
1936 break;
1937 /* FALLTHROUGH */
1938 case 1048:
1939 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1940 break;
1941 case 2004: /* 2004: bracketed paste mode */
1942 MODBIT(term.mode, set, MODE_BRCKTPASTE);
1943 break;
1944 /* Not implemented mouse modes. See comments there. */
1945 case 1001: /* mouse highlight mode; can hang the
1946 terminal by design when implemented. */
1947 case 1005: /* UTF-8 mouse mode; will confuse
1948 applications not supporting UTF-8
1949 and luit. */
1950 case 1015: /* urxvt mangled mouse mode; incompatible
1951 and can be mistaken for other control
1952 codes. */
1953 default:
1954 fprintf(stderr,
1955 "erresc: unknown private set/reset mode %d\n",
1956 *args);
1957 break;
1958 }
1959 } else {
1960 switch(*args) {
1961 case 0: /* Error (IGNORED) */
1962 break;
1963 case 2: /* KAM -- keyboard action */
1964 MODBIT(term.mode, set, MODE_KBDLOCK);
1965 break;
1966 case 4: /* IRM -- Insertion-replacement */
1967 MODBIT(term.mode, set, MODE_INSERT);
1968 break;
1969 case 12: /* SRM -- Send/Receive */
1970 MODBIT(term.mode, !set, MODE_ECHO);
1971 break;
1972 case 20: /* LNM -- Linefeed/new line */
1973 MODBIT(term.mode, set, MODE_CRLF);
1974 break;
1975 default:
1976 fprintf(stderr,
1977 "erresc: unknown set/reset mode %d\n",
1978 *args);
1979 break;
1980 }
1981 }
1982 }
1983 }
1984
1985 void
1986 csihandle(void) {
1987 char buf[40];
1988 int len;
1989
1990 switch(csiescseq.mode[0]) {
1991 default:
1992 unknown:
1993 fprintf(stderr, "erresc: unknown csi ");
1994 csidump();
1995 /* die(""); */
1996 break;
1997 case '@': /* ICH -- Insert <n> blank char */
1998 DEFAULT(csiescseq.arg[0], 1);
1999 tinsertblank(csiescseq.arg[0]);
2000 break;
2001 case 'A': /* CUU -- Cursor <n> Up */
2002 DEFAULT(csiescseq.arg[0], 1);
2003 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
2004 break;
2005 case 'B': /* CUD -- Cursor <n> Down */
2006 case 'e': /* VPR --Cursor <n> Down */
2007 DEFAULT(csiescseq.arg[0], 1);
2008 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
2009 break;
2010 case 'i': /* MC -- Media Copy */
2011 switch(csiescseq.arg[0]) {
2012 case 0:
2013 tdump();
2014 break;
2015 case 1:
2016 tdumpline(term.c.y);
2017 break;
2018 case 2:
2019 tdumpsel();
2020 break;
2021 case 4:
2022 term.mode &= ~MODE_PRINT;
2023 break;
2024 case 5:
2025 term.mode |= MODE_PRINT;
2026 break;
2027 }
2028 break;
2029 case 'c': /* DA -- Device Attributes */
2030 if(csiescseq.arg[0] == 0)
2031 ttywrite(vtiden, sizeof(vtiden) - 1);
2032 break;
2033 case 'C': /* CUF -- Cursor <n> Forward */
2034 case 'a': /* HPR -- Cursor <n> Forward */
2035 DEFAULT(csiescseq.arg[0], 1);
2036 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
2037 break;
2038 case 'D': /* CUB -- Cursor <n> Backward */
2039 DEFAULT(csiescseq.arg[0], 1);
2040 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
2041 break;
2042 case 'E': /* CNL -- Cursor <n> Down and first col */
2043 DEFAULT(csiescseq.arg[0], 1);
2044 tmoveto(0, term.c.y+csiescseq.arg[0]);
2045 break;
2046 case 'F': /* CPL -- Cursor <n> Up and first col */
2047 DEFAULT(csiescseq.arg[0], 1);
2048 tmoveto(0, term.c.y-csiescseq.arg[0]);
2049 break;
2050 case 'g': /* TBC -- Tabulation clear */
2051 switch(csiescseq.arg[0]) {
2052 case 0: /* clear current tab stop */
2053 term.tabs[term.c.x] = 0;
2054 break;
2055 case 3: /* clear all the tabs */
2056 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
2057 break;
2058 default:
2059 goto unknown;
2060 }
2061 break;
2062 case 'G': /* CHA -- Move to <col> */
2063 case '`': /* HPA */
2064 DEFAULT(csiescseq.arg[0], 1);
2065 tmoveto(csiescseq.arg[0]-1, term.c.y);
2066 break;
2067 case 'H': /* CUP -- Move to <row> <col> */
2068 case 'f': /* HVP */
2069 DEFAULT(csiescseq.arg[0], 1);
2070 DEFAULT(csiescseq.arg[1], 1);
2071 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
2072 break;
2073 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
2074 DEFAULT(csiescseq.arg[0], 1);
2075 tputtab(csiescseq.arg[0]);
2076 break;
2077 case 'J': /* ED -- Clear screen */
2078 selclear(NULL);
2079 switch(csiescseq.arg[0]) {
2080 case 0: /* below */
2081 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
2082 if(term.c.y < term.row-1) {
2083 tclearregion(0, term.c.y+1, term.col-1,
2084 term.row-1);
2085 }
2086 break;
2087 case 1: /* above */
2088 if(term.c.y > 1)
2089 tclearregion(0, 0, term.col-1, term.c.y-1);
2090 tclearregion(0, term.c.y, term.c.x, term.c.y);
2091 break;
2092 case 2: /* all */
2093 tclearregion(0, 0, term.col-1, term.row-1);
2094 break;
2095 default:
2096 goto unknown;
2097 }
2098 break;
2099 case 'K': /* EL -- Clear line */
2100 switch(csiescseq.arg[0]) {
2101 case 0: /* right */
2102 tclearregion(term.c.x, term.c.y, term.col-1,
2103 term.c.y);
2104 break;
2105 case 1: /* left */
2106 tclearregion(0, term.c.y, term.c.x, term.c.y);
2107 break;
2108 case 2: /* all */
2109 tclearregion(0, term.c.y, term.col-1, term.c.y);
2110 break;
2111 }
2112 break;
2113 case 'S': /* SU -- Scroll <n> line up */
2114 DEFAULT(csiescseq.arg[0], 1);
2115 tscrollup(term.top, csiescseq.arg[0]);
2116 break;
2117 case 'T': /* SD -- Scroll <n> line down */
2118 DEFAULT(csiescseq.arg[0], 1);
2119 tscrolldown(term.top, csiescseq.arg[0]);
2120 break;
2121 case 'L': /* IL -- Insert <n> blank lines */
2122 DEFAULT(csiescseq.arg[0], 1);
2123 tinsertblankline(csiescseq.arg[0]);
2124 break;
2125 case 'l': /* RM -- Reset Mode */
2126 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
2127 break;
2128 case 'M': /* DL -- Delete <n> lines */
2129 DEFAULT(csiescseq.arg[0], 1);
2130 tdeleteline(csiescseq.arg[0]);
2131 break;
2132 case 'X': /* ECH -- Erase <n> char */
2133 DEFAULT(csiescseq.arg[0], 1);
2134 tclearregion(term.c.x, term.c.y,
2135 term.c.x + csiescseq.arg[0] - 1, term.c.y);
2136 break;
2137 case 'P': /* DCH -- Delete <n> char */
2138 DEFAULT(csiescseq.arg[0], 1);
2139 tdeletechar(csiescseq.arg[0]);
2140 break;
2141 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
2142 DEFAULT(csiescseq.arg[0], 1);
2143 tputtab(-csiescseq.arg[0]);
2144 break;
2145 case 'd': /* VPA -- Move to <row> */
2146 DEFAULT(csiescseq.arg[0], 1);
2147 tmoveato(term.c.x, csiescseq.arg[0]-1);
2148 break;
2149 case 'h': /* SM -- Set terminal mode */
2150 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
2151 break;
2152 case 'm': /* SGR -- Terminal attribute (color) */
2153 tsetattr(csiescseq.arg, csiescseq.narg);
2154 break;
2155 case 'n': /* DSR – Device Status Report (cursor position) */
2156 if (csiescseq.arg[0] == 6) {
2157 len = snprintf(buf, sizeof(buf),"\033[%i;%iR",
2158 term.c.y+1, term.c.x+1);
2159 ttywrite(buf, len);
2160 }
2161 break;
2162 case 'r': /* DECSTBM -- Set Scrolling Region */
2163 if(csiescseq.priv) {
2164 goto unknown;
2165 } else {
2166 DEFAULT(csiescseq.arg[0], 1);
2167 DEFAULT(csiescseq.arg[1], term.row);
2168 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
2169 tmoveato(0, 0);
2170 }
2171 break;
2172 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
2173 tcursor(CURSOR_SAVE);
2174 break;
2175 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
2176 tcursor(CURSOR_LOAD);
2177 break;
2178 case ' ':
2179 switch (csiescseq.mode[1]) {
2180 case 'q': /* DECSCUSR -- Set Cursor Style */
2181 DEFAULT(csiescseq.arg[0], 1);
2182 if (!BETWEEN(csiescseq.arg[0], 0, 6)) {
2183 goto unknown;
2184 }
2185 xw.cursor = csiescseq.arg[0];
2186 break;
2187 default:
2188 goto unknown;
2189 }
2190 break;
2191 }
2192 }
2193
2194 void
2195 csidump(void) {
2196 int i;
2197 uint c;
2198
2199 printf("ESC[");
2200 for(i = 0; i < csiescseq.len; i++) {
2201 c = csiescseq.buf[i] & 0xff;
2202 if(isprint(c)) {
2203 putchar(c);
2204 } else if(c == '\n') {
2205 printf("(\\n)");
2206 } else if(c == '\r') {
2207 printf("(\\r)");
2208 } else if(c == 0x1b) {
2209 printf("(\\e)");
2210 } else {
2211 printf("(%02x)", c);
2212 }
2213 }
2214 putchar('\n');
2215 }
2216
2217 void
2218 csireset(void) {
2219 memset(&csiescseq, 0, sizeof(csiescseq));
2220 }
2221
2222 void
2223 strhandle(void) {
2224 char *p = NULL;
2225 int j, narg, par;
2226
2227 term.esc &= ~(ESC_STR_END|ESC_STR);
2228 strparse();
2229 narg = strescseq.narg;
2230 par = atoi(strescseq.args[0]);
2231
2232 switch(strescseq.type) {
2233 case ']': /* OSC -- Operating System Command */
2234 switch(par) {
2235 case 0:
2236 case 1:
2237 case 2:
2238 if(narg > 1)
2239 xsettitle(strescseq.args[1]);
2240 return;
2241 case 4: /* color set */
2242 if(narg < 3)
2243 break;
2244 p = strescseq.args[2];
2245 /* FALLTHROUGH */
2246 case 104: /* color reset, here p = NULL */
2247 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2248 if(xsetcolorname(j, p)) {
2249 fprintf(stderr, "erresc: invalid color %s\n", p);
2250 } else {
2251 /*
2252 * TODO if defaultbg color is changed, borders
2253 * are dirty
2254 */
2255 redraw();
2256 }
2257 return;
2258 }
2259 break;
2260 case 'k': /* old title set compatibility */
2261 xsettitle(strescseq.args[0]);
2262 return;
2263 case 'P': /* DCS -- Device Control String */
2264 case '_': /* APC -- Application Program Command */
2265 case '^': /* PM -- Privacy Message */
2266 return;
2267 }
2268
2269 fprintf(stderr, "erresc: unknown str ");
2270 strdump();
2271 }
2272
2273 void
2274 strparse(void) {
2275 int c;
2276 char *p = strescseq.buf;
2277
2278 strescseq.narg = 0;
2279 strescseq.buf[strescseq.len] = '\0';
2280
2281 if(*p == '\0')
2282 return;
2283
2284 while(strescseq.narg < STR_ARG_SIZ) {
2285 strescseq.args[strescseq.narg++] = p;
2286 while((c = *p) != ';' && c != '\0')
2287 ++p;
2288 if(c == '\0')
2289 return;
2290 *p++ = '\0';
2291 }
2292 }
2293
2294 void
2295 strdump(void) {
2296 int i;
2297 uint c;
2298
2299 printf("ESC%c", strescseq.type);
2300 for(i = 0; i < strescseq.len; i++) {
2301 c = strescseq.buf[i] & 0xff;
2302 if(c == '\0') {
2303 return;
2304 } else if(isprint(c)) {
2305 putchar(c);
2306 } else if(c == '\n') {
2307 printf("(\\n)");
2308 } else if(c == '\r') {
2309 printf("(\\r)");
2310 } else if(c == 0x1b) {
2311 printf("(\\e)");
2312 } else {
2313 printf("(%02x)", c);
2314 }
2315 }
2316 printf("ESC\\\n");
2317 }
2318
2319 void
2320 strreset(void) {
2321 memset(&strescseq, 0, sizeof(strescseq));
2322 }
2323
2324 void
2325 tprinter(char *s, size_t len) {
2326 if(iofd != -1 && xwrite(iofd, s, len) < 0) {
2327 fprintf(stderr, "Error writing in %s:%s\n",
2328 opt_io, strerror(errno));
2329 close(iofd);
2330 iofd = -1;
2331 }
2332 }
2333
2334 void
2335 toggleprinter(const Arg *arg) {
2336 term.mode ^= MODE_PRINT;
2337 }
2338
2339 void
2340 printscreen(const Arg *arg) {
2341 tdump();
2342 }
2343
2344 void
2345 printsel(const Arg *arg) {
2346 tdumpsel();
2347 }
2348
2349 void
2350 tdumpsel(void) {
2351 char *ptr;
2352
2353 if((ptr = getsel())) {
2354 tprinter(ptr, strlen(ptr));
2355 free(ptr);
2356 }
2357 }
2358
2359 void
2360 tdumpline(int n) {
2361 Glyph *bp, *end;
2362
2363 bp = &term.line[n][0];
2364 end = &bp[MIN(tlinelen(n), term.col) - 1];
2365 if(bp != end || bp->c[0] != ' ') {
2366 for( ;bp <= end; ++bp)
2367 tprinter(bp->c, utf8len(bp->c));
2368 }
2369 tprinter("\n", 1);
2370 }
2371
2372 void
2373 tdump(void) {
2374 int i;
2375
2376 for(i = 0; i < term.row; ++i)
2377 tdumpline(i);
2378 }
2379
2380 void
2381 tputtab(int n) {
2382 uint x = term.c.x;
2383
2384 if(n > 0) {
2385 while(x < term.col && n--)
2386 for(++x; x < term.col && !term.tabs[x]; ++x)
2387 /* nothing */ ;
2388 } else if(n < 0) {
2389 while(x > 0 && n++)
2390 for(--x; x > 0 && !term.tabs[x]; --x)
2391 /* nothing */ ;
2392 }
2393 tmoveto(x, term.c.y);
2394 }
2395
2396 void
2397 techo(char *buf, int len) {
2398 for(; len > 0; buf++, len--) {
2399 char c = *buf;
2400
2401 if(ISCONTROL((uchar) c)) { /* control code */
2402 if(c & 0x80) {
2403 c &= 0x7f;
2404 tputc("^", 1);
2405 tputc("[", 1);
2406 } else if(c != '\n' && c != '\r' && c != '\t') {
2407 c ^= 0x40;
2408 tputc("^", 1);
2409 }
2410 tputc(&c, 1);
2411 } else {
2412 break;
2413 }
2414 }
2415 if(len)
2416 tputc(buf, len);
2417 }
2418
2419 void
2420 tdeftran(char ascii) {
2421 static char cs[] = "0B";
2422 static int vcs[] = {CS_GRAPHIC0, CS_USA};
2423 char *p;
2424
2425 if((p = strchr(cs, ascii)) == NULL) {
2426 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2427 } else {
2428 term.trantbl[term.icharset] = vcs[p - cs];
2429 }
2430 }
2431
2432 void
2433 tdectest(char c) {
2434 static char E[UTF_SIZ] = "E";
2435 int x, y;
2436
2437 if(c == '8') { /* DEC screen alignment test. */
2438 for(x = 0; x < term.col; ++x) {
2439 for(y = 0; y < term.row; ++y)
2440 tsetchar(E, &term.c.attr, x, y);
2441 }
2442 }
2443 }
2444
2445 void
2446 tstrsequence(uchar c) {
2447 switch (c) {
2448 case 0x90: /* DCS -- Device Control String */
2449 c = 'P';
2450 break;
2451 case 0x9f: /* APC -- Application Program Command */
2452 c = '_';
2453 break;
2454 case 0x9e: /* PM -- Privacy Message */
2455 c = '^';
2456 break;
2457 case 0x9d: /* OSC -- Operating System Command */
2458 c = ']';
2459 break;
2460 }
2461 strreset();
2462 strescseq.type = c;
2463 term.esc |= ESC_STR;
2464 return;
2465 }
2466
2467 void
2468 tcontrolcode(uchar ascii) {
2469 static char question[UTF_SIZ] = "?";
2470
2471 switch(ascii) {
2472 case '\t': /* HT */
2473 tputtab(1);
2474 return;
2475 case '\b': /* BS */
2476 tmoveto(term.c.x-1, term.c.y);
2477 return;
2478 case '\r': /* CR */
2479 tmoveto(0, term.c.y);
2480 return;
2481 case '\f': /* LF */
2482 case '\v': /* VT */
2483 case '\n': /* LF */
2484 /* go to first col if the mode is set */
2485 tnewline(IS_SET(MODE_CRLF));
2486 return;
2487 case '\a': /* BEL */
2488 if(term.esc & ESC_STR_END) {
2489 /* backwards compatibility to xterm */
2490 strhandle();
2491 } else {
2492 if(!(xw.state & WIN_FOCUSED))
2493 xseturgency(1);
2494 if (bellvolume)
2495 XkbBell(xw.dpy, xw.win, bellvolume, (Atom)NULL);
2496 }
2497 break;
2498 case '\033': /* ESC */
2499 csireset();
2500 term.esc &= ~(ESC_CSI|ESC_ALTCHARSET|ESC_TEST);
2501 term.esc |= ESC_START;
2502 return;
2503 case '\016': /* SO (LS1 -- Locking shift 1) */
2504 case '\017': /* SI (LS0 -- Locking shift 0) */
2505 term.charset = 1 - (ascii - '\016');
2506 return;
2507 case '\032': /* SUB */
2508 tsetchar(question, &term.c.attr, term.c.x, term.c.y);
2509 case '\030': /* CAN */
2510 csireset();
2511 break;
2512 case '\005': /* ENQ (IGNORED) */
2513 case '\000': /* NUL (IGNORED) */
2514 case '\021': /* XON (IGNORED) */
2515 case '\023': /* XOFF (IGNORED) */
2516 case 0177: /* DEL (IGNORED) */
2517 return;
2518 case 0x84: /* TODO: IND */
2519 break;
2520 case 0x85: /* NEL -- Next line */
2521 tnewline(1); /* always go to first col */
2522 break;
2523 case 0x88: /* HTS -- Horizontal tab stop */
2524 term.tabs[term.c.x] = 1;
2525 break;
2526 case 0x8d: /* TODO: RI */
2527 case 0x8e: /* TODO: SS2 */
2528 case 0x8f: /* TODO: SS3 */
2529 case 0x98: /* TODO: SOS */
2530 break;
2531 case 0x9a: /* DECID -- Identify Terminal */
2532 ttywrite(vtiden, sizeof(vtiden) - 1);
2533 break;
2534 case 0x9b: /* TODO: CSI */
2535 case 0x9c: /* TODO: ST */
2536 break;
2537 case 0x90: /* DCS -- Device Control String */
2538 case 0x9f: /* APC -- Application Program Command */
2539 case 0x9e: /* PM -- Privacy Message */
2540 case 0x9d: /* OSC -- Operating System Command */
2541 tstrsequence(ascii);
2542 return;
2543 }
2544 /* only CAN, SUB, \a and C1 chars interrupt a sequence */
2545 term.esc &= ~(ESC_STR_END|ESC_STR);
2546 return;
2547 }
2548
2549 /*
2550 * returns 1 when the sequence is finished and it hasn't to read
2551 * more characters for this sequence, otherwise 0
2552 */
2553 int
2554 eschandle(uchar ascii) {
2555 switch(ascii) {
2556 case '[':
2557 term.esc |= ESC_CSI;
2558 return 0;
2559 case '#':
2560 term.esc |= ESC_TEST;
2561 return 0;
2562 case 'P': /* DCS -- Device Control String */
2563 case '_': /* APC -- Application Program Command */
2564 case '^': /* PM -- Privacy Message */
2565 case ']': /* OSC -- Operating System Command */
2566 case 'k': /* old title set compatibility */
2567 tstrsequence(ascii);
2568 return 0;
2569 case 'n': /* LS2 -- Locking shift 2 */
2570 case 'o': /* LS3 -- Locking shift 3 */
2571 term.charset = 2 + (ascii - 'n');
2572 break;
2573 case '(': /* GZD4 -- set primary charset G0 */
2574 case ')': /* G1D4 -- set secondary charset G1 */
2575 case '*': /* G2D4 -- set tertiary charset G2 */
2576 case '+': /* G3D4 -- set quaternary charset G3 */
2577 term.icharset = ascii - '(';
2578 term.esc |= ESC_ALTCHARSET;
2579 return 0;
2580 case 'D': /* IND -- Linefeed */
2581 if(term.c.y == term.bot) {
2582 tscrollup(term.top, 1);
2583 } else {
2584 tmoveto(term.c.x, term.c.y+1);
2585 }
2586 break;
2587 case 'E': /* NEL -- Next line */
2588 tnewline(1); /* always go to first col */
2589 break;
2590 case 'H': /* HTS -- Horizontal tab stop */
2591 term.tabs[term.c.x] = 1;
2592 break;
2593 case 'M': /* RI -- Reverse index */
2594 if(term.c.y == term.top) {
2595 tscrolldown(term.top, 1);
2596 } else {
2597 tmoveto(term.c.x, term.c.y-1);
2598 }
2599 break;
2600 case 'Z': /* DECID -- Identify Terminal */
2601 ttywrite(vtiden, sizeof(vtiden) - 1);
2602 break;
2603 case 'c': /* RIS -- Reset to inital state */
2604 treset();
2605 xresettitle();
2606 xloadcols();
2607 break;
2608 case '=': /* DECPAM -- Application keypad */
2609 term.mode |= MODE_APPKEYPAD;
2610 break;
2611 case '>': /* DECPNM -- Normal keypad */
2612 term.mode &= ~MODE_APPKEYPAD;
2613 break;
2614 case '7': /* DECSC -- Save Cursor */
2615 tcursor(CURSOR_SAVE);
2616 break;
2617 case '8': /* DECRC -- Restore Cursor */
2618 tcursor(CURSOR_LOAD);
2619 break;
2620 case '\\': /* ST -- String Terminator */
2621 if(term.esc & ESC_STR_END)
2622 strhandle();
2623 break;
2624 default:
2625 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2626 (uchar) ascii, isprint(ascii)? ascii:'.');
2627 break;
2628 }
2629 return 1;
2630 }
2631
2632 void
2633 tputc(char *c, int len) {
2634 uchar ascii;
2635 bool control;
2636 long unicodep;
2637 int width;
2638 Glyph *gp;
2639
2640 if(len == 1) {
2641 width = 1;
2642 unicodep = ascii = *c;
2643 } else {
2644 utf8decode(c, &unicodep, UTF_SIZ);
2645 if ((width = wcwidth(unicodep)) == -1) {
2646 c = "\357\277\275"; /* UTF_INVALID */
2647 width = 1;
2648 }
2649 ascii = unicodep;
2650 }
2651
2652 if(IS_SET(MODE_PRINT))
2653 tprinter(c, len);
2654 control = ISCONTROL(unicodep);
2655
2656 /*
2657 * STR sequence must be checked before anything else
2658 * because it uses all following characters until it
2659 * receives a ESC, a SUB, a ST or any other C1 control
2660 * character.
2661 */
2662 if(term.esc & ESC_STR) {
2663 if(len == 1 &&
2664 (ascii == '\a' || ascii == 030 ||
2665 ascii == 032 || ascii == 033 ||
2666 ISCONTROLC1(unicodep))) {
2667 term.esc &= ~(ESC_START|ESC_STR);
2668 term.esc |= ESC_STR_END;
2669 } else if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2670 memmove(&strescseq.buf[strescseq.len], c, len);
2671 strescseq.len += len;
2672 return;
2673 } else {
2674 /*
2675 * Here is a bug in terminals. If the user never sends
2676 * some code to stop the str or esc command, then st
2677 * will stop responding. But this is better than
2678 * silently failing with unknown characters. At least
2679 * then users will report back.
2680 *
2681 * In the case users ever get fixed, here is the code:
2682 */
2683 /*
2684 * term.esc = 0;
2685 * strhandle();
2686 */
2687 return;
2688 }
2689 }
2690
2691 /*
2692 * Actions of control codes must be performed as soon they arrive
2693 * because they can be embedded inside a control sequence, and
2694 * they must not cause conflicts with sequences.
2695 */
2696 if(control) {
2697 tcontrolcode(ascii);
2698 /*
2699 * control codes are not shown ever
2700 */
2701 return;
2702 } else if(term.esc & ESC_START) {
2703 if(term.esc & ESC_CSI) {
2704 csiescseq.buf[csiescseq.len++] = ascii;
2705 if(BETWEEN(ascii, 0x40, 0x7E)
2706 || csiescseq.len >= \
2707 sizeof(csiescseq.buf)-1) {
2708 term.esc = 0;
2709 csiparse();
2710 csihandle();
2711 }
2712 return;
2713 } else if(term.esc & ESC_ALTCHARSET) {
2714 tdeftran(ascii);
2715 } else if(term.esc & ESC_TEST) {
2716 tdectest(ascii);
2717 } else {
2718 if (!eschandle(ascii))
2719 return;
2720 /* sequence already finished */
2721 }
2722 term.esc = 0;
2723 /*
2724 * All characters which form part of a sequence are not
2725 * printed
2726 */
2727 return;
2728 }
2729 if(sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
2730 selclear(NULL);
2731
2732 gp = &term.line[term.c.y][term.c.x];
2733 if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2734 gp->mode |= ATTR_WRAP;
2735 tnewline(1);
2736 gp = &term.line[term.c.y][term.c.x];
2737 }
2738
2739 if(IS_SET(MODE_INSERT) && term.c.x+width < term.col)
2740 memmove(gp+width, gp, (term.col - term.c.x - width) * sizeof(Glyph));
2741
2742 if(term.c.x+width > term.col) {
2743 tnewline(1);
2744 gp = &term.line[term.c.y][term.c.x];
2745 }
2746
2747 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2748
2749 if(width == 2) {
2750 gp->mode |= ATTR_WIDE;
2751 if(term.c.x+1 < term.col) {
2752 gp[1].c[0] = '\0';
2753 gp[1].mode = ATTR_WDUMMY;
2754 }
2755 }
2756 if(term.c.x+width < term.col) {
2757 tmoveto(term.c.x+width, term.c.y);
2758 } else {
2759 term.c.state |= CURSOR_WRAPNEXT;
2760 }
2761 }
2762
2763 void
2764 tresize(int col, int row) {
2765 int i;
2766 int minrow = MIN(row, term.row);
2767 int mincol = MIN(col, term.col);
2768 bool *bp;
2769 TCursor c;
2770
2771 if(col < 1 || row < 1) {
2772 fprintf(stderr,
2773 "tresize: error resizing to %dx%d\n", col, row);
2774 return;
2775 }
2776
2777 /*
2778 * slide screen to keep cursor where we expect it -
2779 * tscrollup would work here, but we can optimize to
2780 * memmove because we're freeing the earlier lines
2781 */
2782 for(i = 0; i <= term.c.y - row; i++) {
2783 free(term.line[i]);
2784 free(term.alt[i]);
2785 }
2786 if(i > 0) {
2787 memmove(term.line, term.line + i, row * sizeof(Line));
2788 memmove(term.alt, term.alt + i, row * sizeof(Line));
2789 }
2790 for(i += row; i < term.row; i++) {
2791 free(term.line[i]);
2792 free(term.alt[i]);
2793 }
2794
2795 /* resize to new height */
2796 term.line = xrealloc(term.line, row * sizeof(Line));
2797 term.alt = xrealloc(term.alt, row * sizeof(Line));
2798 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2799 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2800
2801 /* resize each row to new width, zero-pad if needed */
2802 for(i = 0; i < minrow; i++) {
2803 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2804 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2805 }
2806
2807 /* allocate any new rows */
2808 for(/* i == minrow */; i < row; i++) {
2809 term.line[i] = xmalloc(col * sizeof(Glyph));
2810 term.alt[i] = xmalloc(col * sizeof(Glyph));
2811 }
2812 if(col > term.col) {
2813 bp = term.tabs + term.col;
2814
2815 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2816 while(--bp > term.tabs && !*bp)
2817 /* nothing */ ;
2818 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2819 *bp = 1;
2820 }
2821 /* update terminal size */
2822 term.col = col;
2823 term.row = row;
2824 /* reset scrolling region */
2825 tsetscroll(0, row-1);
2826 /* make use of the LIMIT in tmoveto */
2827 tmoveto(term.c.x, term.c.y);
2828 /* Clearing both screens (it makes dirty all lines) */
2829 c = term.c;
2830 for(i = 0; i < 2; i++) {
2831 if(mincol < col && 0 < minrow) {
2832 tclearregion(mincol, 0, col - 1, minrow - 1);
2833 }
2834 if(0 < col && minrow < row) {
2835 tclearregion(0, minrow, col - 1, row - 1);
2836 }
2837 tswapscreen();
2838 tcursor(CURSOR_LOAD);
2839 }
2840 term.c = c;
2841 }
2842
2843 void
2844 xresize(int col, int row) {
2845 xw.tw = MAX(1, col * xw.cw);
2846 xw.th = MAX(1, row * xw.ch);
2847
2848 XFreePixmap(xw.dpy, xw.buf);
2849 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2850 DefaultDepth(xw.dpy, xw.scr));
2851 XftDrawChange(xw.draw, xw.buf);
2852 xclear(0, 0, xw.w, xw.h);
2853 }
2854
2855 ushort
2856 sixd_to_16bit(int x) {
2857 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2858 }
2859
2860 void
2861 xloadcols(void) {
2862 int i;
2863 XRenderColor color = { .alpha = 0xffff };
2864 static bool loaded;
2865 Color *cp;
2866
2867 if(loaded) {
2868 for (cp = dc.col; cp < dc.col + LEN(dc.col); ++cp)
2869 XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
2870 }
2871
2872 /* load colors [0-15] and [256-LEN(colorname)] (config.h) */
2873 for(i = 0; i < LEN(colorname); i++) {
2874 if(!colorname[i])
2875 continue;
2876 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2877 die("Could not allocate color '%s'\n", colorname[i]);
2878 }
2879 }
2880
2881 /* load colors [16-231] ; same colors as xterm */
2882 for(i = 16; i < 6*6*6+16; i++) {
2883 color.red = sixd_to_16bit( ((i-16)/36)%6 );
2884 color.green = sixd_to_16bit( ((i-16)/6) %6 );
2885 color.blue = sixd_to_16bit( ((i-16)/1) %6 );
2886 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i]))
2887 die("Could not allocate color %d\n", i);
2888 }
2889
2890 /* load colors [232-255] ; grayscale */
2891 for(; i < 256; i++) {
2892 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (i-(6*6*6+16));
2893 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i]))
2894 die("Could not allocate color %d\n", i);
2895 }
2896 loaded = true;
2897 }
2898
2899 int
2900 xsetcolorname(int x, const char *name) {
2901 XRenderColor color = { .alpha = 0xffff };
2902 Color ncolor;
2903
2904 if(!BETWEEN(x, 0, LEN(colorname)))
2905 return 1;
2906
2907 if(!name) {
2908 if(BETWEEN(x, 16, 16 + 215)) { /* 256 color */
2909 color.red = sixd_to_16bit( ((x-16)/36)%6 );
2910 color.green = sixd_to_16bit( ((x-16)/6) %6 );
2911 color.blue = sixd_to_16bit( ((x-16)/1) %6 );
2912 if(!XftColorAllocValue(xw.dpy, xw.vis,
2913 xw.cmap, &color, &ncolor)) {
2914 return 1;
2915 }
2916
2917 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2918 dc.col[x] = ncolor;
2919 return 0;
2920 } else if(BETWEEN(x, 16 + 216, 255)) { /* greyscale */
2921 color.red = color.green = color.blue = \
2922 0x0808 + 0x0a0a * (x - (16 + 216));
2923 if(!XftColorAllocValue(xw.dpy, xw.vis,
2924 xw.cmap, &color, &ncolor)) {
2925 return 1;
2926 }
2927
2928 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2929 dc.col[x] = ncolor;
2930 return 0;
2931 } else { /* system colors */
2932 name = colorname[x];
2933 }
2934 }
2935 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &ncolor))
2936 return 1;
2937
2938 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2939 dc.col[x] = ncolor;
2940 return 0;
2941 }
2942
2943 void
2944 xtermclear(int col1, int row1, int col2, int row2) {
2945 XftDrawRect(xw.draw,
2946 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2947 borderpx + col1 * xw.cw,
2948 borderpx + row1 * xw.ch,
2949 (col2-col1+1) * xw.cw,
2950 (row2-row1+1) * xw.ch);
2951 }
2952
2953 /*
2954 * Absolute coordinates.
2955 */
2956 void
2957 xclear(int x1, int y1, int x2, int y2) {
2958 XftDrawRect(xw.draw,
2959 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2960 x1, y1, x2-x1, y2-y1);
2961 }
2962
2963 void
2964 xhints(void) {
2965 XClassHint class = {opt_class ? opt_class : termname, termname};
2966 XWMHints wm = {.flags = InputHint, .input = 1};
2967 XSizeHints *sizeh = NULL;
2968
2969 sizeh = XAllocSizeHints();
2970
2971 sizeh->flags = PSize | PResizeInc | PBaseSize;
2972 sizeh->height = xw.h;
2973 sizeh->width = xw.w;
2974 sizeh->height_inc = xw.ch;
2975 sizeh->width_inc = xw.cw;
2976 sizeh->base_height = 2 * borderpx;
2977 sizeh->base_width = 2 * borderpx;
2978 if(xw.isfixed == True) {
2979 sizeh->flags |= PMaxSize | PMinSize;
2980 sizeh->min_width = sizeh->max_width = xw.w;
2981 sizeh->min_height = sizeh->max_height = xw.h;
2982 }
2983 if(xw.gm & (XValue|YValue)) {
2984 sizeh->flags |= USPosition | PWinGravity;
2985 sizeh->x = xw.l;
2986 sizeh->y = xw.t;
2987 sizeh->win_gravity = xgeommasktogravity(xw.gm);
2988 }
2989
2990 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
2991 &class);
2992 XFree(sizeh);
2993 }
2994
2995 int
2996 xgeommasktogravity(int mask) {
2997 switch(mask & (XNegative|YNegative)) {
2998 case 0:
2999 return NorthWestGravity;
3000 case XNegative:
3001 return NorthEastGravity;
3002 case YNegative:
3003 return SouthWestGravity;
3004 }
3005 return SouthEastGravity;
3006 }
3007
3008 int
3009 xloadfont(Font *f, FcPattern *pattern) {
3010 FcPattern *match;
3011 FcResult result;
3012
3013 match = FcFontMatch(NULL, pattern, &result);
3014 if(!match)
3015 return 1;
3016
3017 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
3018 FcPatternDestroy(match);
3019 return 1;
3020 }
3021
3022 f->set = NULL;
3023 f->pattern = FcPatternDuplicate(pattern);
3024
3025 f->ascent = f->match->ascent;
3026 f->descent = f->match->descent;
3027 f->lbearing = 0;
3028 f->rbearing = f->match->max_advance_width;
3029
3030 f->height = f->ascent + f->descent;
3031 f->width = f->lbearing + f->rbearing;
3032
3033 return 0;
3034 }
3035
3036 void
3037 xloadfonts(char *fontstr, double fontsize) {
3038 FcPattern *pattern;
3039 FcResult r_sz, r_psz;
3040 double fontval;
3041 float ceilf(float);
3042
3043 if(fontstr[0] == '-') {
3044 pattern = XftXlfdParse(fontstr, False, False);
3045 } else {
3046 pattern = FcNameParse((FcChar8 *)fontstr);
3047 }
3048
3049 if(!pattern)
3050 die("st: can't open font %s\n", fontstr);
3051
3052 if(fontsize > 1) {
3053 FcPatternDel(pattern, FC_PIXEL_SIZE);
3054 FcPatternDel(pattern, FC_SIZE);
3055 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
3056 usedfontsize = fontsize;
3057 } else {
3058 r_psz = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
3059 r_sz = FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval);
3060 if(r_psz == FcResultMatch) {
3061 usedfontsize = fontval;
3062 } else if(r_sz == FcResultMatch) {
3063 usedfontsize = -1;
3064 } else {
3065 /*
3066 * Default font size is 12, if none given. This is to
3067 * have a known usedfontsize value.
3068 */
3069 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
3070 usedfontsize = 12;
3071 }
3072 defaultfontsize = usedfontsize;
3073 }
3074
3075 FcConfigSubstitute(0, pattern, FcMatchPattern);
3076 FcDefaultSubstitute(pattern);
3077
3078 if(xloadfont(&dc.font, pattern))
3079 die("st: can't open font %s\n", fontstr);
3080
3081 if(usedfontsize < 0) {
3082 FcPatternGetDouble(dc.font.match->pattern,
3083 FC_PIXEL_SIZE, 0, &fontval);
3084 usedfontsize = fontval;
3085 if(fontsize == 0)
3086 defaultfontsize = fontval;
3087 }
3088
3089 /* Setting character width and height. */
3090 xw.cw = ceilf(dc.font.width * cwscale);
3091 xw.ch = ceilf(dc.font.height * chscale);
3092
3093 FcPatternDel(pattern, FC_SLANT);
3094 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
3095 if(xloadfont(&dc.ifont, pattern))
3096 die("st: can't open font %s\n", fontstr);
3097
3098 FcPatternDel(pattern, FC_WEIGHT);
3099 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
3100 if(xloadfont(&dc.ibfont, pattern))
3101 die("st: can't open font %s\n", fontstr);
3102
3103 FcPatternDel(pattern, FC_SLANT);
3104 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
3105 if(xloadfont(&dc.bfont, pattern))
3106 die("st: can't open font %s\n", fontstr);
3107
3108 FcPatternDestroy(pattern);
3109 }
3110
3111 void
3112 xunloadfont(Font *f) {
3113 XftFontClose(xw.dpy, f->match);
3114 FcPatternDestroy(f->pattern);
3115 if(f->set)
3116 FcFontSetDestroy(f->set);
3117 }
3118
3119 void
3120 xunloadfonts(void) {
3121 /* Free the loaded fonts in the font cache. */
3122 while(frclen > 0)
3123 XftFontClose(xw.dpy, frc[--frclen].font);
3124
3125 xunloadfont(&dc.font);
3126 xunloadfont(&dc.bfont);
3127 xunloadfont(&dc.ifont);
3128 xunloadfont(&dc.ibfont);
3129 }
3130
3131 void
3132 xzoom(const Arg *arg) {
3133 Arg larg;
3134
3135 larg.i = usedfontsize + arg->i;
3136 xzoomabs(&larg);
3137 }
3138
3139 void
3140 xzoomabs(const Arg *arg) {
3141 xunloadfonts();
3142 xloadfonts(usedfont, arg->i);
3143 cresize(0, 0);
3144 redraw();
3145 xhints();
3146 }
3147
3148 void
3149 xzoomreset(const Arg *arg) {
3150 Arg larg;
3151
3152 if(defaultfontsize > 0) {
3153 larg.i = defaultfontsize;
3154 xzoomabs(&larg);
3155 }
3156 }
3157
3158 void
3159 xinit(void) {
3160 XGCValues gcvalues;
3161 Cursor cursor;
3162 Window parent;
3163 pid_t thispid = getpid();
3164
3165 if(!(xw.dpy = XOpenDisplay(NULL)))
3166 die("Can't open display\n");
3167 xw.scr = XDefaultScreen(xw.dpy);
3168 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
3169
3170 /* font */
3171 if(!FcInit())
3172 die("Could not init fontconfig.\n");
3173
3174 usedfont = (opt_font == NULL)? font : opt_font;
3175 xloadfonts(usedfont, 0);
3176
3177 /* colors */
3178 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
3179 xloadcols();
3180
3181 /* adjust fixed window geometry */
3182 xw.w = 2 * borderpx + term.col * xw.cw;
3183 xw.h = 2 * borderpx + term.row * xw.ch;
3184 if(xw.gm & XNegative)
3185 xw.l += DisplayWidth(xw.dpy, xw.scr) - xw.w - 2;
3186 if(xw.gm & YNegative)
3187 xw.t += DisplayWidth(xw.dpy, xw.scr) - xw.h - 2;
3188
3189 /* Events */
3190 xw.attrs.background_pixel = dc.col[defaultbg].pixel;
3191 xw.attrs.border_pixel = dc.col[defaultbg].pixel;
3192 xw.attrs.bit_gravity = NorthWestGravity;
3193 xw.attrs.event_mask = FocusChangeMask | KeyPressMask
3194 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
3195 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
3196 xw.attrs.colormap = xw.cmap;
3197
3198 if (!(opt_embed && (parent = strtol(opt_embed, NULL, 0))))
3199 parent = XRootWindow(xw.dpy, xw.scr);
3200 xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
3201 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
3202 xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
3203 | CWEventMask | CWColormap, &xw.attrs);
3204
3205 memset(&gcvalues, 0, sizeof(gcvalues));
3206 gcvalues.graphics_exposures = False;
3207 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
3208 &gcvalues);
3209 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
3210 DefaultDepth(xw.dpy, xw.scr));
3211 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
3212 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
3213
3214 /* Xft rendering context */
3215 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
3216
3217 /* input methods */
3218 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3219 XSetLocaleModifiers("@im=local");
3220 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3221 XSetLocaleModifiers("@im=");
3222 if((xw.xim = XOpenIM(xw.dpy,
3223 NULL, NULL, NULL)) == NULL) {
3224 die("XOpenIM failed. Could not open input"
3225 " device.\n");
3226 }
3227 }
3228 }
3229 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
3230 | XIMStatusNothing, XNClientWindow, xw.win,
3231 XNFocusWindow, xw.win, NULL);
3232 if(xw.xic == NULL)
3233 die("XCreateIC failed. Could not obtain input method.\n");
3234
3235 /* white cursor, black outline */
3236 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
3237 XDefineCursor(xw.dpy, xw.win, cursor);
3238 XRecolorCursor(xw.dpy, cursor,
3239 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
3240 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
3241
3242 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
3243 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
3244 xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
3245 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
3246
3247 xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
3248 XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
3249 PropModeReplace, (uchar *)&thispid, 1);
3250
3251 xresettitle();
3252 XMapWindow(xw.dpy, xw.win);
3253 xhints();
3254 XSync(xw.dpy, False);
3255 }
3256
3257 void
3258 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
3259 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
3260 width = charlen * xw.cw, xp, i;
3261 int frcflags, charexists;
3262 int u8fl, u8fblen, u8cblen, doesexist;
3263 char *u8c, *u8fs;
3264 long unicodep;
3265 Font *font = &dc.font;
3266 FcResult fcres;
3267 FcPattern *fcpattern, *fontpattern;
3268 FcFontSet *fcsets[] = { NULL };
3269 FcCharSet *fccharset;
3270 Color *fg, *bg, *temp, revfg, revbg, truefg, truebg;
3271 XRenderColor colfg, colbg;
3272 XRectangle r;
3273 int oneatatime;
3274
3275 frcflags = FRC_NORMAL;
3276
3277 if(base.mode & ATTR_ITALIC) {
3278 if(base.fg == defaultfg)
3279 base.fg = defaultitalic;
3280 font = &dc.ifont;
3281 frcflags = FRC_ITALIC;
3282 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
3283 if(base.fg == defaultfg)
3284 base.fg = defaultitalic;
3285 font = &dc.ibfont;
3286 frcflags = FRC_ITALICBOLD;
3287 } else if(base.mode & ATTR_UNDERLINE) {
3288 if(base.fg == defaultfg)
3289 base.fg = defaultunderline;
3290 }
3291
3292 if(IS_TRUECOL(base.fg)) {
3293 colfg.alpha = 0xffff;
3294 colfg.red = TRUERED(base.fg);
3295 colfg.green = TRUEGREEN(base.fg);
3296 colfg.blue = TRUEBLUE(base.fg);
3297 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
3298 fg = &truefg;
3299 } else {
3300 fg = &dc.col[base.fg];
3301 }
3302
3303 if(IS_TRUECOL(base.bg)) {
3304 colbg.alpha = 0xffff;
3305 colbg.green = TRUEGREEN(base.bg);
3306 colbg.red = TRUERED(base.bg);
3307 colbg.blue = TRUEBLUE(base.bg);
3308 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
3309 bg = &truebg;
3310 } else {
3311 bg = &dc.col[base.bg];
3312 }
3313
3314 if(base.mode & ATTR_BOLD) {
3315 /*
3316 * change basic system colors [0-7]
3317 * to bright system colors [8-15]
3318 */
3319 if(BETWEEN(base.fg, 0, 7) && !(base.mode & ATTR_FAINT))
3320 fg = &dc.col[base.fg + 8];
3321
3322 if(base.mode & ATTR_ITALIC) {
3323 font = &dc.ibfont;
3324 frcflags = FRC_ITALICBOLD;
3325 } else {
3326 font = &dc.bfont;
3327 frcflags = FRC_BOLD;
3328 }
3329 }
3330
3331 if(IS_SET(MODE_REVERSE)) {
3332 if(fg == &dc.col[defaultfg]) {
3333 fg = &dc.col[defaultbg];
3334 } else {
3335 colfg.red = ~fg->color.red;
3336 colfg.green = ~fg->color.green;
3337 colfg.blue = ~fg->color.blue;
3338 colfg.alpha = fg->color.alpha;
3339 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
3340 &revfg);
3341 fg = &revfg;
3342 }
3343
3344 if(bg == &dc.col[defaultbg]) {
3345 bg = &dc.col[defaultfg];
3346 } else {
3347 colbg.red = ~bg->color.red;
3348 colbg.green = ~bg->color.green;
3349 colbg.blue = ~bg->color.blue;
3350 colbg.alpha = bg->color.alpha;
3351 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
3352 &revbg);
3353 bg = &revbg;
3354 }
3355 }
3356
3357 if(base.mode & ATTR_REVERSE) {
3358 temp = fg;
3359 fg = bg;
3360 bg = temp;
3361 }
3362
3363 if(base.mode & ATTR_FAINT && !(base.mode & ATTR_BOLD)) {
3364 colfg.red = fg->color.red / 2;
3365 colfg.green = fg->color.green / 2;
3366 colfg.blue = fg->color.blue / 2;
3367 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
3368 fg = &revfg;
3369 }
3370
3371 if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
3372 fg = bg;
3373
3374 if(base.mode & ATTR_INVISIBLE)
3375 fg = bg;
3376
3377 /* Intelligent cleaning up of the borders. */
3378 if(x == 0) {
3379 xclear(0, (y == 0)? 0 : winy, borderpx,
3380 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
3381 }
3382 if(x + charlen >= term.col) {
3383 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
3384 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
3385 }
3386 if(y == 0)
3387 xclear(winx, 0, winx + width, borderpx);
3388 if(y == term.row-1)
3389 xclear(winx, winy + xw.ch, winx + width, xw.h);
3390
3391 /* Clean up the region we want to draw to. */
3392 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
3393
3394 /* Set the clip region because Xft is sometimes dirty. */
3395 r.x = 0;
3396 r.y = 0;
3397 r.height = xw.ch;
3398 r.width = width;
3399 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
3400
3401 for(xp = winx; bytelen > 0;) {
3402 /*
3403 * Search for the range in the to be printed string of glyphs
3404 * that are in the main font. Then print that range. If
3405 * some glyph is found that is not in the font, do the
3406 * fallback dance.
3407 */
3408 u8fs = s;
3409 u8fblen = 0;
3410 u8fl = 0;
3411 oneatatime = font->width != xw.cw;
3412 for(;;) {
3413 u8c = s;
3414 u8cblen = utf8decode(s, &unicodep, UTF_SIZ);
3415 s += u8cblen;
3416 bytelen -= u8cblen;
3417
3418 doesexist = XftCharExists(xw.dpy, font->match, unicodep);
3419 if(doesexist) {
3420 u8fl++;
3421 u8fblen += u8cblen;
3422 if(!oneatatime && bytelen > 0)
3423 continue;
3424 }
3425
3426 if(u8fl > 0) {
3427 XftDrawStringUtf8(xw.draw, fg,
3428 font->match, xp,
3429 winy + font->ascent,
3430 (FcChar8 *)u8fs,
3431 u8fblen);
3432 xp += xw.cw * u8fl;
3433 }
3434 break;
3435 }
3436 if(doesexist) {
3437 if(oneatatime)
3438 continue;
3439 break;
3440 }
3441
3442 /* Search the font cache. */
3443 for(i = 0; i < frclen; i++) {
3444 charexists = XftCharExists(xw.dpy, frc[i].font, unicodep);
3445 /* Everything correct. */
3446 if(charexists && frc[i].flags == frcflags)
3447 break;
3448 /* We got a default font for a not found glyph. */
3449 if(!charexists && frc[i].flags == frcflags \
3450 && frc[i].unicodep == unicodep) {
3451 break;
3452 }
3453 }
3454
3455 /* Nothing was found. */
3456 if(i >= frclen) {
3457 if(!font->set)
3458 font->set = FcFontSort(0, font->pattern,
3459 FcTrue, 0, &fcres);
3460 fcsets[0] = font->set;
3461
3462 /*
3463 * Nothing was found in the cache. Now use
3464 * some dozen of Fontconfig calls to get the
3465 * font for one single character.
3466 *
3467 * Xft and fontconfig are design failures.
3468 */
3469 fcpattern = FcPatternDuplicate(font->pattern);
3470 fccharset = FcCharSetCreate();
3471
3472 FcCharSetAddChar(fccharset, unicodep);
3473 FcPatternAddCharSet(fcpattern, FC_CHARSET,
3474 fccharset);
3475 FcPatternAddBool(fcpattern, FC_SCALABLE,
3476 FcTrue);
3477
3478 FcConfigSubstitute(0, fcpattern,
3479 FcMatchPattern);
3480 FcDefaultSubstitute(fcpattern);
3481
3482 fontpattern = FcFontSetMatch(0, fcsets, 1,
3483 fcpattern, &fcres);
3484
3485 /*
3486 * Overwrite or create the new cache entry.
3487 */
3488 if(frclen >= LEN(frc)) {
3489 frclen = LEN(frc) - 1;
3490 XftFontClose(xw.dpy, frc[frclen].font);
3491 frc[frclen].unicodep = 0;
3492 }
3493
3494 frc[frclen].font = XftFontOpenPattern(xw.dpy,
3495 fontpattern);
3496 frc[frclen].flags = frcflags;
3497 frc[frclen].unicodep = unicodep;
3498
3499 i = frclen;
3500 frclen++;
3501
3502 FcPatternDestroy(fcpattern);
3503 FcCharSetDestroy(fccharset);
3504 }
3505
3506 XftDrawStringUtf8(xw.draw, fg, frc[i].font,
3507 xp, winy + frc[i].font->ascent,
3508 (FcChar8 *)u8c, u8cblen);
3509
3510 xp += xw.cw * wcwidth(unicodep);
3511 }
3512
3513 /*
3514 * This is how the loop above actually should be. Why does the
3515 * application have to care about font details?
3516 *
3517 * I have to repeat: Xft and Fontconfig are design failures.
3518 */
3519 /*
3520 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
3521 winy + font->ascent, (FcChar8 *)s, bytelen);
3522 */
3523
3524 if(base.mode & ATTR_UNDERLINE) {
3525 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
3526 width, 1);
3527 }
3528
3529 if(base.mode & ATTR_STRUCK) {
3530 XftDrawRect(xw.draw, fg, winx, winy + 2 * font->ascent / 3,
3531 width, 1);
3532 }
3533
3534 /* Reset clip to none. */
3535 XftDrawSetClip(xw.draw, 0);
3536 }
3537
3538 void
3539 xdrawcursor(void) {
3540 static int oldx = 0, oldy = 0;
3541 int sl, width, curx;
3542 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
3543
3544 LIMIT(oldx, 0, term.col-1);
3545 LIMIT(oldy, 0, term.row-1);
3546
3547 curx = term.c.x;
3548
3549 /* adjust position if in dummy */
3550 if(term.line[oldy][oldx].mode & ATTR_WDUMMY)
3551 oldx--;
3552 if(term.line[term.c.y][curx].mode & ATTR_WDUMMY)
3553 curx--;
3554
3555 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
3556
3557 /* remove the old cursor */
3558 sl = utf8len(term.line[oldy][oldx].c);
3559 width = (term.line[oldy][oldx].mode & ATTR_WIDE)? 2 : 1;
3560 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
3561 oldy, width, sl);
3562
3563 if(IS_SET(MODE_HIDE))
3564 return;
3565
3566 /* draw the new one */
3567 if(xw.state & WIN_FOCUSED) {
3568 switch (xw.cursor) {
3569 case 0: /* Blinking Block */
3570 case 1: /* Blinking Block (Default) */
3571 case 2: /* Steady Block */
3572 if(IS_SET(MODE_REVERSE)) {
3573 g.mode |= ATTR_REVERSE;
3574 g.fg = defaultcs;
3575 g.bg = defaultfg;
3576 }
3577
3578 sl = utf8len(g.c);
3579 width = (term.line[term.c.y][curx].mode & ATTR_WIDE)\
3580 ? 2 : 1;
3581 xdraws(g.c, g, term.c.x, term.c.y, width, sl);
3582 break;
3583 case 3: /* Blinking Underline */
3584 case 4: /* Steady Underline */
3585 XftDrawRect(xw.draw, &dc.col[defaultcs],
3586 borderpx + curx * xw.cw,
3587 borderpx + (term.c.y + 1) * xw.ch - cursorthickness,
3588 xw.cw, cursorthickness);
3589 break;
3590 case 5: /* Blinking bar */
3591 case 6: /* Steady bar */
3592 XftDrawRect(xw.draw, &dc.col[defaultcs],
3593 borderpx + curx * xw.cw,
3594 borderpx + term.c.y * xw.ch,
3595 cursorthickness, xw.ch);
3596 break;
3597 }
3598 } else {
3599 XftDrawRect(xw.draw, &dc.col[defaultcs],
3600 borderpx + curx * xw.cw,
3601 borderpx + term.c.y * xw.ch,
3602 xw.cw - 1, 1);
3603 XftDrawRect(xw.draw, &dc.col[defaultcs],
3604 borderpx + curx * xw.cw,
3605 borderpx + term.c.y * xw.ch,
3606 1, xw.ch - 1);
3607 XftDrawRect(xw.draw, &dc.col[defaultcs],
3608 borderpx + (curx + 1) * xw.cw - 1,
3609 borderpx + term.c.y * xw.ch,
3610 1, xw.ch - 1);
3611 XftDrawRect(xw.draw, &dc.col[defaultcs],
3612 borderpx + curx * xw.cw,
3613 borderpx + (term.c.y + 1) * xw.ch - 1,
3614 xw.cw, 1);
3615 }
3616 oldx = curx, oldy = term.c.y;
3617 }
3618
3619
3620 void
3621 xsettitle(char *p) {
3622 XTextProperty prop;
3623
3624 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3625 &prop);
3626 XSetWMName(xw.dpy, xw.win, &prop);
3627 XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
3628 XFree(prop.value);
3629 }
3630
3631 void
3632 xresettitle(void) {
3633 xsettitle(opt_title ? opt_title : "st");
3634 }
3635
3636 void
3637 redraw(void) {
3638 tfulldirt();
3639 draw();
3640 }
3641
3642 void
3643 draw(void) {
3644 drawregion(0, 0, term.col, term.row);
3645 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3646 xw.h, 0, 0);
3647 XSetForeground(xw.dpy, dc.gc,
3648 dc.col[IS_SET(MODE_REVERSE)?
3649 defaultfg : defaultbg].pixel);
3650 }
3651
3652 void
3653 drawregion(int x1, int y1, int x2, int y2) {
3654 int ic, ib, x, y, ox, sl;
3655 Glyph base, new;
3656 char buf[DRAW_BUF_SIZ];
3657 bool ena_sel = sel.ob.x != -1 && sel.alt == IS_SET(MODE_ALTSCREEN);
3658 long unicodep;
3659
3660 if(!(xw.state & WIN_VISIBLE))
3661 return;
3662
3663 for(y = y1; y < y2; y++) {
3664 if(!term.dirty[y])
3665 continue;
3666
3667 xtermclear(0, y, term.col, y);
3668 term.dirty[y] = 0;
3669 base = term.line[y][0];
3670 ic = ib = ox = 0;
3671 for(x = x1; x < x2; x++) {
3672 new = term.line[y][x];
3673 if(new.mode == ATTR_WDUMMY)
3674 continue;
3675 if(ena_sel && selected(x, y))
3676 new.mode ^= ATTR_REVERSE;
3677 if(ib > 0 && (ATTRCMP(base, new)
3678 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3679 xdraws(buf, base, ox, y, ic, ib);
3680 ic = ib = 0;
3681 }
3682 if(ib == 0) {
3683 ox = x;
3684 base = new;
3685 }
3686
3687 sl = utf8decode(new.c, &unicodep, UTF_SIZ);
3688 memcpy(buf+ib, new.c, sl);
3689 ib += sl;
3690 ic += (new.mode & ATTR_WIDE)? 2 : 1;
3691 }
3692 if(ib > 0)
3693 xdraws(buf, base, ox, y, ic, ib);
3694 }
3695 xdrawcursor();
3696 }
3697
3698 void
3699 expose(XEvent *ev) {
3700 XExposeEvent *e = &ev->xexpose;
3701
3702 if(xw.state & WIN_REDRAW) {
3703 if(!e->count)
3704 xw.state &= ~WIN_REDRAW;
3705 }
3706 redraw();
3707 }
3708
3709 void
3710 visibility(XEvent *ev) {
3711 XVisibilityEvent *e = &ev->xvisibility;
3712
3713 if(e->state == VisibilityFullyObscured) {
3714 xw.state &= ~WIN_VISIBLE;
3715 } else if(!(xw.state & WIN_VISIBLE)) {
3716 /* need a full redraw for next Expose, not just a buf copy */
3717 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3718 }
3719 }
3720
3721 void
3722 unmap(XEvent *ev) {
3723 xw.state &= ~WIN_VISIBLE;
3724 }
3725
3726 void
3727 xsetpointermotion(int set) {
3728 MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
3729 XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
3730 }
3731
3732 void
3733 xseturgency(int add) {
3734 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3735
3736 MODBIT(h->flags, add, XUrgencyHint);
3737 XSetWMHints(xw.dpy, xw.win, h);
3738 XFree(h);
3739 }
3740
3741 void
3742 focus(XEvent *ev) {
3743 XFocusChangeEvent *e = &ev->xfocus;
3744
3745 if(e->mode == NotifyGrab)
3746 return;
3747
3748 if(ev->type == FocusIn) {
3749 XSetICFocus(xw.xic);
3750 xw.state |= WIN_FOCUSED;
3751 xseturgency(0);
3752 if(IS_SET(MODE_FOCUS))
3753 ttywrite("\033[I", 3);
3754 } else {
3755 XUnsetICFocus(xw.xic);
3756 xw.state &= ~WIN_FOCUSED;
3757 if(IS_SET(MODE_FOCUS))
3758 ttywrite("\033[O", 3);
3759 }
3760 }
3761
3762 bool
3763 match(uint mask, uint state) {
3764 return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
3765 }
3766
3767 void
3768 numlock(const Arg *dummy) {
3769 term.numlock ^= 1;
3770 }
3771
3772 char*
3773 kmap(KeySym k, uint state) {
3774 Key *kp;
3775 int i;
3776
3777 /* Check for mapped keys out of X11 function keys. */
3778 for(i = 0; i < LEN(mappedkeys); i++) {
3779 if(mappedkeys[i] == k)
3780 break;
3781 }
3782 if(i == LEN(mappedkeys)) {
3783 if((k & 0xFFFF) < 0xFD00)
3784 return NULL;
3785 }
3786
3787 for(kp = key; kp < key + LEN(key); kp++) {
3788 if(kp->k != k)
3789 continue;
3790
3791 if(!match(kp->mask, state))
3792 continue;
3793
3794 if(IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
3795 continue;
3796 if(term.numlock && kp->appkey == 2)
3797 continue;
3798
3799 if(IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
3800 continue;
3801
3802 if(IS_SET(MODE_CRLF) ? kp->crlf < 0 : kp->crlf > 0)
3803 continue;
3804
3805 return kp->s;
3806 }
3807
3808 return NULL;
3809 }
3810
3811 void
3812 kpress(XEvent *ev) {
3813 XKeyEvent *e = &ev->xkey;
3814 KeySym ksym;
3815 char buf[32], *customkey;
3816 int len;
3817 long c;
3818 Status status;
3819 Shortcut *bp;
3820
3821 if(IS_SET(MODE_KBDLOCK))
3822 return;
3823
3824 len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
3825 /* 1. shortcuts */
3826 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3827 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3828 bp->func(&(bp->arg));
3829 return;
3830 }
3831 }
3832
3833 /* 2. custom keys from config.h */
3834 if((customkey = kmap(ksym, e->state))) {
3835 ttysend(customkey, strlen(customkey));
3836 return;
3837 }
3838
3839 /* 3. composed string from input method */
3840 if(len == 0)
3841 return;
3842 if(len == 1 && e->state & Mod1Mask) {
3843 if(IS_SET(MODE_8BIT)) {
3844 if(*buf < 0177) {
3845 c = *buf | 0x80;
3846 len = utf8encode(c, buf, UTF_SIZ);
3847 }
3848 } else {
3849 buf[1] = buf[0];
3850 buf[0] = '\033';
3851 len = 2;
3852 }
3853 }
3854 ttysend(buf, len);
3855 }
3856
3857
3858 void
3859 cmessage(XEvent *e) {
3860 /*
3861 * See xembed specs
3862 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3863 */
3864 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3865 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3866 xw.state |= WIN_FOCUSED;
3867 xseturgency(0);
3868 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3869 xw.state &= ~WIN_FOCUSED;
3870 }
3871 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3872 /* Send SIGHUP to shell */
3873 kill(pid, SIGHUP);
3874 exit(EXIT_SUCCESS);
3875 }
3876 }
3877
3878 void
3879 cresize(int width, int height) {
3880 int col, row;
3881
3882 if(width != 0)
3883 xw.w = width;
3884 if(height != 0)
3885 xw.h = height;
3886
3887 col = (xw.w - 2 * borderpx) / xw.cw;
3888 row = (xw.h - 2 * borderpx) / xw.ch;
3889
3890 tresize(col, row);
3891 xresize(col, row);
3892 ttyresize();
3893 }
3894
3895 void
3896 resize(XEvent *e) {
3897 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3898 return;
3899
3900 cresize(e->xconfigure.width, e->xconfigure.height);
3901 }
3902
3903 void
3904 run(void) {
3905 XEvent ev;
3906 int w = xw.w, h = xw.h;
3907 fd_set rfd;
3908 int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3909 struct timespec drawtimeout, *tv = NULL, now, last, lastblink;
3910 long deltatime;
3911
3912 /* Waiting for window mapping */
3913 do {
3914 XNextEvent(xw.dpy, &ev);
3915 if(ev.type == ConfigureNotify) {
3916 w = ev.xconfigure.width;
3917 h = ev.xconfigure.height;
3918 }
3919 } while(ev.type != MapNotify);
3920
3921 ttynew();
3922 cresize(w, h);
3923
3924 clock_gettime(CLOCK_MONOTONIC, &last);
3925 lastblink = last;
3926
3927 for(xev = actionfps;;) {
3928 FD_ZERO(&rfd);
3929 FD_SET(cmdfd, &rfd);
3930 FD_SET(xfd, &rfd);
3931
3932 if(pselect(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv, NULL) < 0) {
3933 if(errno == EINTR)
3934 continue;
3935 die("select failed: %s\n", strerror(errno));
3936 }
3937 if(FD_ISSET(cmdfd, &rfd)) {
3938 ttyread();
3939 if(blinktimeout) {
3940 blinkset = tattrset(ATTR_BLINK);
3941 if(!blinkset)
3942 MODBIT(term.mode, 0, MODE_BLINK);
3943 }
3944 }
3945
3946 if(FD_ISSET(xfd, &rfd))
3947 xev = actionfps;
3948
3949 clock_gettime(CLOCK_MONOTONIC, &now);
3950 drawtimeout.tv_sec = 0;
3951 drawtimeout.tv_nsec = (1000/xfps) * 1E6;
3952 tv = &drawtimeout;
3953
3954 dodraw = 0;
3955 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
3956 tsetdirtattr(ATTR_BLINK);
3957 term.mode ^= MODE_BLINK;
3958 lastblink = now;
3959 dodraw = 1;
3960 }
3961 deltatime = TIMEDIFF(now, last);
3962 if(deltatime > (xev? (1000/xfps) : (1000/actionfps))
3963 || deltatime < 0) {
3964 dodraw = 1;
3965 last = now;
3966 }
3967
3968 if(dodraw) {
3969 while(XPending(xw.dpy)) {
3970 XNextEvent(xw.dpy, &ev);
3971 if(XFilterEvent(&ev, None))
3972 continue;
3973 if(handler[ev.type])
3974 (handler[ev.type])(&ev);
3975 }
3976
3977 draw();
3978 XFlush(xw.dpy);
3979
3980 if(xev && !FD_ISSET(xfd, &rfd))
3981 xev--;
3982 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
3983 if(blinkset) {
3984 if(TIMEDIFF(now, lastblink) \
3985 > blinktimeout) {
3986 drawtimeout.tv_nsec = 1000;
3987 } else {
3988 drawtimeout.tv_nsec = (1E6 * \
3989 (blinktimeout - \
3990 TIMEDIFF(now,
3991 lastblink)));
3992 }
3993 drawtimeout.tv_sec = \
3994 drawtimeout.tv_nsec / 1E9;
3995 drawtimeout.tv_nsec %= (long)1E9;
3996 } else {
3997 tv = NULL;
3998 }
3999 }
4000 }
4001 }
4002 }
4003
4004 void
4005 usage(void) {
4006 die("%s " VERSION " (c) 2010-2015 st engineers\n" \
4007 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]\n"
4008 " [-i] [-t title] [-w windowid] [-e command ...]\n", argv0);
4009 }
4010
4011 int
4012 main(int argc, char *argv[]) {
4013 char *titles;
4014 uint cols = 80, rows = 24;
4015
4016 xw.l = xw.t = 0;
4017 xw.isfixed = False;
4018 xw.cursor = 0;
4019
4020 ARGBEGIN {
4021 case 'a':
4022 allowaltscreen = false;
4023 break;
4024 case 'c':
4025 opt_class = EARGF(usage());
4026 break;
4027 case 'e':
4028 /* eat all remaining arguments */
4029 if(argc > 1) {
4030 opt_cmd = &argv[1];
4031 if(argv[1] != NULL && opt_title == NULL) {
4032 titles = xstrdup(argv[1]);
4033 opt_title = basename(titles);
4034 }
4035 }
4036 goto run;
4037 case 'f':
4038 opt_font = EARGF(usage());
4039 break;
4040 case 'g':
4041 xw.gm = XParseGeometry(EARGF(usage()),
4042 &xw.l, &xw.t, &cols, &rows);
4043 break;
4044 case 'i':
4045 xw.isfixed = True;
4046 break;
4047 case 'o':
4048 opt_io = EARGF(usage());
4049 break;
4050 case 't':
4051 opt_title = EARGF(usage());
4052 break;
4053 case 'w':
4054 opt_embed = EARGF(usage());
4055 break;
4056 case 'v':
4057 default:
4058 usage();
4059 } ARGEND;
4060
4061 run:
4062 setlocale(LC_CTYPE, "");
4063 XSetLocaleModifiers("");
4064 tnew(MAX(cols, 1), MAX(rows, 1));
4065 xinit();
4066 selinit();
4067 run();
4068
4069 return 0;
4070 }
4071