Xinqi Bao's Git

projects / st.git / blob
summary | log | commit | diff | tree
history | raw | HEAD
Implement most ICCCM rules for selection handling.
[st.git] / st.c
1 /* See LICENSE for licence details. */
2 #include <ctype.h>
3 #include <errno.h>
4 #include <fcntl.h>
5 #include <limits.h>
6 #include <locale.h>
7 #include <pwd.h>
8 #include <stdarg.h>
9 #include <stdbool.h>
10 #include <stdio.h>
11 #include <stdlib.h>
12 #include <string.h>
13 #include <signal.h>
14 #include <stdint.h>
15 #include <sys/ioctl.h>
16 #include <sys/select.h>
17 #include <sys/stat.h>
18 #include <sys/time.h>
19 #include <sys/types.h>
20 #include <sys/wait.h>
21 #include <time.h>
22 #include <unistd.h>
23 #include <libgen.h>
24 #include <X11/Xatom.h>
25 #include <X11/Xlib.h>
26 #include <X11/Xutil.h>
27 #include <X11/cursorfont.h>
28 #include <X11/keysym.h>
29 #include <X11/Xft/Xft.h>
30 #include <X11/XKBlib.h>
31 #include <fontconfig/fontconfig.h>
32 #include <wchar.h>
33
34 #include "arg.h"
35
36 char *argv0;
37
38 #define Glyph Glyph_
39 #define Font Font_
40
41 #if defined(__linux)
42 #include <pty.h>
43 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
44 #include <util.h>
45 #elif defined(__FreeBSD__) || defined(__DragonFly__)
46 #include <libutil.h>
47 #endif
48
49
50 /* XEMBED messages */
51 #define XEMBED_FOCUS_IN 4
52 #define XEMBED_FOCUS_OUT 5
53
54 /* Arbitrary sizes */
55 #define UTF_INVALID 0xFFFD
56 #define UTF_SIZ 4
57 #define ESC_BUF_SIZ (128*UTF_SIZ)
58 #define ESC_ARG_SIZ 16
59 #define STR_BUF_SIZ ESC_BUF_SIZ
60 #define STR_ARG_SIZ ESC_ARG_SIZ
61 #define DRAW_BUF_SIZ 20*1024
62 #define XK_ANY_MOD UINT_MAX
63 #define XK_NO_MOD 0
64 #define XK_SWITCH_MOD (1<<13)
65
66 /* macros */
67 #define MIN(a, b) ((a) < (b) ? (a) : (b))
68 #define MAX(a, b) ((a) < (b) ? (b) : (a))
69 #define LEN(a) (sizeof(a) / sizeof(a)[0])
70 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
71 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
72 #define ISCONTROLC0(c) (BETWEEN(c, 0, 0x1f) || (c) == '\177')
73 #define ISCONTROLC1(c) (BETWEEN(c, 0x80, 0x9f))
74 #define ISCONTROL(c) (ISCONTROLC0(c) || ISCONTROLC1(c))
75 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
76 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
77 #define IS_SET(flag) ((term.mode & (flag)) != 0)
78 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_nsec-t2.tv_nsec)/1E6)
79 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
80
81 #define TRUECOLOR(r,g,b) (1 << 24 | (r) << 16 | (g) << 8 | (b))
82 #define IS_TRUECOL(x) (1 << 24 & (x))
83 #define TRUERED(x) (((x) & 0xff0000) >> 8)
84 #define TRUEGREEN(x) (((x) & 0xff00))
85 #define TRUEBLUE(x) (((x) & 0xff) << 8)
86
87
88 enum glyph_attribute {
89 ATTR_NULL = 0,
90 ATTR_BOLD = 1 << 0,
91 ATTR_FAINT = 1 << 1,
92 ATTR_ITALIC = 1 << 2,
93 ATTR_UNDERLINE = 1 << 3,
94 ATTR_BLINK = 1 << 4,
95 ATTR_REVERSE = 1 << 5,
96 ATTR_INVISIBLE = 1 << 6,
97 ATTR_STRUCK = 1 << 7,
98 ATTR_WRAP = 1 << 8,
99 ATTR_WIDE = 1 << 9,
100 ATTR_WDUMMY = 1 << 10,
101 };
102
103 enum cursor_movement {
104 CURSOR_SAVE,
105 CURSOR_LOAD
106 };
107
108 enum cursor_state {
109 CURSOR_DEFAULT = 0,
110 CURSOR_WRAPNEXT = 1,
111 CURSOR_ORIGIN = 2
112 };
113
114 enum term_mode {
115 MODE_WRAP = 1 << 0,
116 MODE_INSERT = 1 << 1,
117 MODE_APPKEYPAD = 1 << 2,
118 MODE_ALTSCREEN = 1 << 3,
119 MODE_CRLF = 1 << 4,
120 MODE_MOUSEBTN = 1 << 5,
121 MODE_MOUSEMOTION = 1 << 6,
122 MODE_REVERSE = 1 << 7,
123 MODE_KBDLOCK = 1 << 8,
124 MODE_HIDE = 1 << 9,
125 MODE_ECHO = 1 << 10,
126 MODE_APPCURSOR = 1 << 11,
127 MODE_MOUSESGR = 1 << 12,
128 MODE_8BIT = 1 << 13,
129 MODE_BLINK = 1 << 14,
130 MODE_FBLINK = 1 << 15,
131 MODE_FOCUS = 1 << 16,
132 MODE_MOUSEX10 = 1 << 17,
133 MODE_MOUSEMANY = 1 << 18,
134 MODE_BRCKTPASTE = 1 << 19,
135 MODE_PRINT = 1 << 20,
136 MODE_MOUSE = MODE_MOUSEBTN|MODE_MOUSEMOTION|MODE_MOUSEX10\
137 |MODE_MOUSEMANY,
138 };
139
140 enum charset {
141 CS_GRAPHIC0,
142 CS_GRAPHIC1,
143 CS_UK,
144 CS_USA,
145 CS_MULTI,
146 CS_GER,
147 CS_FIN
148 };
149
150 enum escape_state {
151 ESC_START = 1,
152 ESC_CSI = 2,
153 ESC_STR = 4, /* DCS, OSC, PM, APC */
154 ESC_ALTCHARSET = 8,
155 ESC_STR_END = 16, /* a final string was encountered */
156 ESC_TEST = 32, /* Enter in test mode */
157 };
158
159 enum window_state {
160 WIN_VISIBLE = 1,
161 WIN_REDRAW = 2,
162 WIN_FOCUSED = 4
163 };
164
165 enum selection_type {
166 SEL_REGULAR = 1,
167 SEL_RECTANGULAR = 2
168 };
169
170 enum selection_snap {
171 SNAP_WORD = 1,
172 SNAP_LINE = 2
173 };
174
175 typedef unsigned char uchar;
176 typedef unsigned int uint;
177 typedef unsigned long ulong;
178 typedef unsigned short ushort;
179
180 typedef XftDraw *Draw;
181 typedef XftColor Color;
182
183 typedef struct {
184 char c[UTF_SIZ]; /* character code */
185 ushort mode; /* attribute flags */
186 uint32_t fg; /* foreground */
187 uint32_t bg; /* background */
188 } Glyph;
189
190 typedef Glyph *Line;
191
192 typedef struct {
193 Glyph attr; /* current char attributes */
194 int x;
195 int y;
196 char state;
197 } TCursor;
198
199 /* CSI Escape sequence structs */
200 /* ESC '[' [[ [<priv>] <arg> [;]] <mode> [<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 *, Time);
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(Time);
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 + 1; 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(Time t) {
988 xsetsel(getsel(), t);
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 = &e->xselection;
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 if (xsre->property == None)
1087 xsre->property = xsre->target;
1088
1089 /* reject */
1090 xev.property = None;
1091
1092 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
1093 if(xsre->target == xa_targets) {
1094 /* respond with the supported type */
1095 string = sel.xtarget;
1096 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1097 XA_ATOM, 32, PropModeReplace,
1098 (uchar *) &string, 1);
1099 xev.property = xsre->property;
1100 } else if(xsre->target == sel.xtarget || xsre->target == XA_STRING) {
1101 /*
1102 * xith XA_STRING non ascii characters may be incorrect in the
1103 * requestor. It is not our problem, use utf8.
1104 */
1105 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1106 if(xsre->selection == XA_PRIMARY) {
1107 seltext = sel.primary;
1108 } else if(xsre->selection == clipboard) {
1109 seltext = sel.clipboard;
1110 } else {
1111 fprintf(stderr,
1112 "Unhandled clipboard selection 0x%lx\n",
1113 xsre->selection);
1114 return;
1115 }
1116 if(seltext != NULL) {
1117 XChangeProperty(xsre->display, xsre->requestor,
1118 xsre->property, xsre->target,
1119 8, PropModeReplace,
1120 (uchar *)seltext, strlen(seltext));
1121 xev.property = xsre->property;
1122 }
1123 }
1124
1125 /* all done, send a notification to the listener */
1126 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
1127 fprintf(stderr, "Error sending SelectionNotify event\n");
1128 }
1129
1130 void
1131 xsetsel(char *str, Time t) {
1132 free(sel.primary);
1133 sel.primary = str;
1134
1135 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, t);
1136 if (XGetSelectionOwner(xw.dpy, XA_PRIMARY) != xw.win)
1137 selclear(0);
1138 }
1139
1140 void
1141 brelease(XEvent *e) {
1142 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1143 mousereport(e);
1144 return;
1145 }
1146
1147 if(e->xbutton.button == Button2) {
1148 selpaste(NULL);
1149 } else if(e->xbutton.button == Button1) {
1150 if(sel.mode < 2) {
1151 selclear(NULL);
1152 } else {
1153 getbuttoninfo(e);
1154 selcopy(e->xbutton.time);
1155 }
1156 sel.mode = 0;
1157 tsetdirt(sel.nb.y, sel.ne.y);
1158 }
1159 }
1160
1161 void
1162 bmotion(XEvent *e) {
1163 int oldey, oldex, oldsby, oldsey;
1164
1165 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1166 mousereport(e);
1167 return;
1168 }
1169
1170 if(!sel.mode)
1171 return;
1172
1173 sel.mode++;
1174 oldey = sel.oe.y;
1175 oldex = sel.oe.x;
1176 oldsby = sel.nb.y;
1177 oldsey = sel.ne.y;
1178 getbuttoninfo(e);
1179
1180 if(oldey != sel.oe.y || oldex != sel.oe.x)
1181 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
1182 }
1183
1184 void
1185 die(const char *errstr, ...) {
1186 va_list ap;
1187
1188 va_start(ap, errstr);
1189 vfprintf(stderr, errstr, ap);
1190 va_end(ap);
1191 exit(EXIT_FAILURE);
1192 }
1193
1194 void
1195 execsh(void) {
1196 char **args, *sh, *prog;
1197 const struct passwd *pw;
1198 char buf[sizeof(long) * 8 + 1];
1199
1200 errno = 0;
1201 if((pw = getpwuid(getuid())) == NULL) {
1202 if(errno)
1203 die("getpwuid:%s\n", strerror(errno));
1204 else
1205 die("who are you?\n");
1206 }
1207
1208 if (!(sh = getenv("SHELL"))) {
1209 sh = (pw->pw_shell[0]) ? pw->pw_shell : shell;
1210 }
1211
1212 if(opt_cmd)
1213 prog = opt_cmd[0];
1214 else if(utmp)
1215 prog = utmp;
1216 else
1217 prog = sh;
1218 args = (opt_cmd) ? opt_cmd : (char *[]) {prog, NULL};
1219
1220 snprintf(buf, sizeof(buf), "%lu", xw.win);
1221
1222 unsetenv("COLUMNS");
1223 unsetenv("LINES");
1224 unsetenv("TERMCAP");
1225 setenv("LOGNAME", pw->pw_name, 1);
1226 setenv("USER", pw->pw_name, 1);
1227 setenv("SHELL", sh, 1);
1228 setenv("HOME", pw->pw_dir, 1);
1229 setenv("TERM", termname, 1);
1230 setenv("WINDOWID", buf, 1);
1231
1232 signal(SIGCHLD, SIG_DFL);
1233 signal(SIGHUP, SIG_DFL);
1234 signal(SIGINT, SIG_DFL);
1235 signal(SIGQUIT, SIG_DFL);
1236 signal(SIGTERM, SIG_DFL);
1237 signal(SIGALRM, SIG_DFL);
1238
1239 execvp(prog, args);
1240 _exit(EXIT_FAILURE);
1241 }
1242
1243 void
1244 sigchld(int a) {
1245 int stat, ret;
1246
1247 if(waitpid(pid, &stat, 0) < 0)
1248 die("Waiting for pid %hd failed: %s\n", pid, strerror(errno));
1249
1250 ret = WIFEXITED(stat) ? WEXITSTATUS(stat) : EXIT_FAILURE;
1251 if (ret != EXIT_SUCCESS)
1252 die("child finished with error '%d'\n", stat);
1253 exit(EXIT_SUCCESS);
1254 }
1255
1256 void
1257 ttynew(void) {
1258 int m, s;
1259 struct winsize w = {term.row, term.col, 0, 0};
1260
1261 /* seems to work fine on linux, openbsd and freebsd */
1262 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1263 die("openpty failed: %s\n", strerror(errno));
1264
1265 switch(pid = fork()) {
1266 case -1:
1267 die("fork failed\n");
1268 break;
1269 case 0:
1270 setsid(); /* create a new process group */
1271 dup2(s, STDIN_FILENO);
1272 dup2(s, STDOUT_FILENO);
1273 dup2(s, STDERR_FILENO);
1274 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1275 die("ioctl TIOCSCTTY failed: %s\n", strerror(errno));
1276 close(s);
1277 close(m);
1278 execsh();
1279 break;
1280 default:
1281 close(s);
1282 cmdfd = m;
1283 signal(SIGCHLD, sigchld);
1284 if(opt_io) {
1285 term.mode |= MODE_PRINT;
1286 iofd = (!strcmp(opt_io, "-")) ?
1287 STDOUT_FILENO :
1288 open(opt_io, O_WRONLY | O_CREAT, 0666);
1289 if(iofd < 0) {
1290 fprintf(stderr, "Error opening %s:%s\n",
1291 opt_io, strerror(errno));
1292 }
1293 }
1294 break;
1295 }
1296 }
1297
1298 void
1299 ttyread(void) {
1300 static char buf[BUFSIZ];
1301 static int buflen = 0;
1302 char *ptr;
1303 char s[UTF_SIZ];
1304 int charsize; /* size of utf8 char in bytes */
1305 long unicodep;
1306 int ret;
1307
1308 /* append read bytes to unprocessed bytes */
1309 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1310 die("Couldn't read from shell: %s\n", strerror(errno));
1311
1312 /* process every complete utf8 char */
1313 buflen += ret;
1314 ptr = buf;
1315 while((charsize = utf8decode(ptr, &unicodep, buflen))) {
1316 utf8encode(unicodep, s, UTF_SIZ);
1317 tputc(s, charsize);
1318 ptr += charsize;
1319 buflen -= charsize;
1320 }
1321
1322 /* keep any uncomplete utf8 char for the next call */
1323 memmove(buf, ptr, buflen);
1324 }
1325
1326 void
1327 ttywrite(const char *s, size_t n) {
1328 if(xwrite(cmdfd, s, n) == -1)
1329 die("write error on tty: %s\n", strerror(errno));
1330 }
1331
1332 void
1333 ttysend(char *s, size_t n) {
1334 ttywrite(s, n);
1335 if(IS_SET(MODE_ECHO))
1336 techo(s, n);
1337 }
1338
1339 void
1340 ttyresize(void) {
1341 struct winsize w;
1342
1343 w.ws_row = term.row;
1344 w.ws_col = term.col;
1345 w.ws_xpixel = xw.tw;
1346 w.ws_ypixel = xw.th;
1347 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1348 fprintf(stderr, "Couldn't set window size: %s\n", strerror(errno));
1349 }
1350
1351 int
1352 tattrset(int attr) {
1353 int i, j;
1354
1355 for(i = 0; i < term.row-1; i++) {
1356 for(j = 0; j < term.col-1; j++) {
1357 if(term.line[i][j].mode & attr)
1358 return 1;
1359 }
1360 }
1361
1362 return 0;
1363 }
1364
1365 void
1366 tsetdirt(int top, int bot) {
1367 int i;
1368
1369 LIMIT(top, 0, term.row-1);
1370 LIMIT(bot, 0, term.row-1);
1371
1372 for(i = top; i <= bot; i++)
1373 term.dirty[i] = 1;
1374 }
1375
1376 void
1377 tsetdirtattr(int attr) {
1378 int i, j;
1379
1380 for(i = 0; i < term.row-1; i++) {
1381 for(j = 0; j < term.col-1; j++) {
1382 if(term.line[i][j].mode & attr) {
1383 tsetdirt(i, i);
1384 break;
1385 }
1386 }
1387 }
1388 }
1389
1390 void
1391 tfulldirt(void) {
1392 tsetdirt(0, term.row-1);
1393 }
1394
1395 void
1396 tcursor(int mode) {
1397 static TCursor c[2];
1398 bool alt = IS_SET(MODE_ALTSCREEN);
1399
1400 if(mode == CURSOR_SAVE) {
1401 c[alt] = term.c;
1402 } else if(mode == CURSOR_LOAD) {
1403 term.c = c[alt];
1404 tmoveto(c[alt].x, c[alt].y);
1405 }
1406 }
1407
1408 void
1409 treset(void) {
1410 uint i;
1411
1412 term.c = (TCursor){{
1413 .mode = ATTR_NULL,
1414 .fg = defaultfg,
1415 .bg = defaultbg
1416 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1417
1418 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1419 for(i = tabspaces; i < term.col; i += tabspaces)
1420 term.tabs[i] = 1;
1421 term.top = 0;
1422 term.bot = term.row - 1;
1423 term.mode = MODE_WRAP;
1424 memset(term.trantbl, sizeof(term.trantbl), CS_USA);
1425 term.charset = 0;
1426
1427 for(i = 0; i < 2; i++) {
1428 tmoveto(0, 0);
1429 tcursor(CURSOR_SAVE);
1430 tclearregion(0, 0, term.col-1, term.row-1);
1431 tswapscreen();
1432 }
1433 }
1434
1435 void
1436 tnew(int col, int row) {
1437 term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } };
1438 tresize(col, row);
1439 term.numlock = 1;
1440
1441 treset();
1442 }
1443
1444 void
1445 tswapscreen(void) {
1446 Line *tmp = term.line;
1447
1448 term.line = term.alt;
1449 term.alt = tmp;
1450 term.mode ^= MODE_ALTSCREEN;
1451 tfulldirt();
1452 }
1453
1454 void
1455 tscrolldown(int orig, int n) {
1456 int i;
1457 Line temp;
1458
1459 LIMIT(n, 0, term.bot-orig+1);
1460
1461 tsetdirt(orig, term.bot-n);
1462 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1463
1464 for(i = term.bot; i >= orig+n; i--) {
1465 temp = term.line[i];
1466 term.line[i] = term.line[i-n];
1467 term.line[i-n] = temp;
1468 }
1469
1470 selscroll(orig, n);
1471 }
1472
1473 void
1474 tscrollup(int orig, int n) {
1475 int i;
1476 Line temp;
1477
1478 LIMIT(n, 0, term.bot-orig+1);
1479
1480 tclearregion(0, orig, term.col-1, orig+n-1);
1481 tsetdirt(orig+n, term.bot);
1482
1483 for(i = orig; i <= term.bot-n; i++) {
1484 temp = term.line[i];
1485 term.line[i] = term.line[i+n];
1486 term.line[i+n] = temp;
1487 }
1488
1489 selscroll(orig, -n);
1490 }
1491
1492 void
1493 selscroll(int orig, int n) {
1494 if(sel.ob.x == -1)
1495 return;
1496
1497 if(BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
1498 if((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
1499 selclear(NULL);
1500 return;
1501 }
1502 if(sel.type == SEL_RECTANGULAR) {
1503 if(sel.ob.y < term.top)
1504 sel.ob.y = term.top;
1505 if(sel.oe.y > term.bot)
1506 sel.oe.y = term.bot;
1507 } else {
1508 if(sel.ob.y < term.top) {
1509 sel.ob.y = term.top;
1510 sel.ob.x = 0;
1511 }
1512 if(sel.oe.y > term.bot) {
1513 sel.oe.y = term.bot;
1514 sel.oe.x = term.col;
1515 }
1516 }
1517 selnormalize();
1518 }
1519 }
1520
1521 void
1522 tnewline(int first_col) {
1523 int y = term.c.y;
1524
1525 if(y == term.bot) {
1526 tscrollup(term.top, 1);
1527 } else {
1528 y++;
1529 }
1530 tmoveto(first_col ? 0 : term.c.x, y);
1531 }
1532
1533 void
1534 csiparse(void) {
1535 char *p = csiescseq.buf, *np;
1536 long int v;
1537
1538 csiescseq.narg = 0;
1539 if(*p == '?') {
1540 csiescseq.priv = 1;
1541 p++;
1542 }
1543
1544 csiescseq.buf[csiescseq.len] = '\0';
1545 while(p < csiescseq.buf+csiescseq.len) {
1546 np = NULL;
1547 v = strtol(p, &np, 10);
1548 if(np == p)
1549 v = 0;
1550 if(v == LONG_MAX || v == LONG_MIN)
1551 v = -1;
1552 csiescseq.arg[csiescseq.narg++] = v;
1553 p = np;
1554 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1555 break;
1556 p++;
1557 }
1558 csiescseq.mode[0] = *p++;
1559 csiescseq.mode[1] = (p < csiescseq.buf+csiescseq.len) ? *p : '\0';
1560 }
1561
1562 /* for absolute user moves, when decom is set */
1563 void
1564 tmoveato(int x, int y) {
1565 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1566 }
1567
1568 void
1569 tmoveto(int x, int y) {
1570 int miny, maxy;
1571
1572 if(term.c.state & CURSOR_ORIGIN) {
1573 miny = term.top;
1574 maxy = term.bot;
1575 } else {
1576 miny = 0;
1577 maxy = term.row - 1;
1578 }
1579 LIMIT(x, 0, term.col-1);
1580 LIMIT(y, miny, maxy);
1581 term.c.state &= ~CURSOR_WRAPNEXT;
1582 term.c.x = x;
1583 term.c.y = y;
1584 }
1585
1586 void
1587 tsetchar(char *c, Glyph *attr, int x, int y) {
1588 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1589 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1590 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1591 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1592 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1593 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1594 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1595 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1596 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1597 };
1598
1599 /*
1600 * The table is proudly stolen from rxvt.
1601 */
1602 if(term.trantbl[term.charset] == CS_GRAPHIC0) {
1603 if(BETWEEN(c[0], 0x41, 0x7e) && vt100_0[c[0] - 0x41]) {
1604 c = vt100_0[c[0] - 0x41];
1605 }
1606 }
1607
1608 if(term.line[y][x].mode & ATTR_WIDE) {
1609 if(x+1 < term.col) {
1610 term.line[y][x+1].c[0] = ' ';
1611 term.line[y][x+1].mode &= ~ATTR_WDUMMY;
1612 }
1613 } else if(term.line[y][x].mode & ATTR_WDUMMY) {
1614 term.line[y][x-1].c[0] = ' ';
1615 term.line[y][x-1].mode &= ~ATTR_WIDE;
1616 }
1617
1618 term.dirty[y] = 1;
1619 term.line[y][x] = *attr;
1620 memcpy(term.line[y][x].c, c, UTF_SIZ);
1621 }
1622
1623 void
1624 tclearregion(int x1, int y1, int x2, int y2) {
1625 int x, y, temp;
1626 Glyph *gp;
1627
1628 if(x1 > x2)
1629 temp = x1, x1 = x2, x2 = temp;
1630 if(y1 > y2)
1631 temp = y1, y1 = y2, y2 = temp;
1632
1633 LIMIT(x1, 0, term.col-1);
1634 LIMIT(x2, 0, term.col-1);
1635 LIMIT(y1, 0, term.row-1);
1636 LIMIT(y2, 0, term.row-1);
1637
1638 for(y = y1; y <= y2; y++) {
1639 term.dirty[y] = 1;
1640 for(x = x1; x <= x2; x++) {
1641 gp = &term.line[y][x];
1642 if(selected(x, y))
1643 selclear(NULL);
1644 gp->fg = term.c.attr.fg;
1645 gp->bg = term.c.attr.bg;
1646 gp->mode = 0;
1647 memcpy(gp->c, " ", 2);
1648 }
1649 }
1650 }
1651
1652 void
1653 tdeletechar(int n) {
1654 int dst, src, size;
1655 Glyph *line;
1656
1657 LIMIT(n, 0, term.col - term.c.x);
1658
1659 dst = term.c.x;
1660 src = term.c.x + n;
1661 size = term.col - src;
1662 line = term.line[term.c.y];
1663
1664 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1665 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1666 }
1667
1668 void
1669 tinsertblank(int n) {
1670 int dst, src, size;
1671 Glyph *line;
1672
1673 LIMIT(n, 0, term.col - term.c.x);
1674
1675 dst = term.c.x + n;
1676 src = term.c.x;
1677 size = term.col - dst;
1678 line = term.line[term.c.y];
1679
1680 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1681 tclearregion(src, term.c.y, dst - 1, term.c.y);
1682 }
1683
1684 void
1685 tinsertblankline(int n) {
1686 if(BETWEEN(term.c.y, term.top, term.bot))
1687 tscrolldown(term.c.y, n);
1688 }
1689
1690 void
1691 tdeleteline(int n) {
1692 if(BETWEEN(term.c.y, term.top, term.bot))
1693 tscrollup(term.c.y, n);
1694 }
1695
1696 int32_t
1697 tdefcolor(int *attr, int *npar, int l) {
1698 int32_t idx = -1;
1699 uint r, g, b;
1700
1701 switch (attr[*npar + 1]) {
1702 case 2: /* direct color in RGB space */
1703 if (*npar + 4 >= l) {
1704 fprintf(stderr,
1705 "erresc(38): Incorrect number of parameters (%d)\n",
1706 *npar);
1707 break;
1708 }
1709 r = attr[*npar + 2];
1710 g = attr[*npar + 3];
1711 b = attr[*npar + 4];
1712 *npar += 4;
1713 if(!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
1714 fprintf(stderr, "erresc: bad rgb color (%d,%d,%d)\n",
1715 r, g, b);
1716 else
1717 idx = TRUECOLOR(r, g, b);
1718 break;
1719 case 5: /* indexed color */
1720 if (*npar + 2 >= l) {
1721 fprintf(stderr,
1722 "erresc(38): Incorrect number of parameters (%d)\n",
1723 *npar);
1724 break;
1725 }
1726 *npar += 2;
1727 if(!BETWEEN(attr[*npar], 0, 255))
1728 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
1729 else
1730 idx = attr[*npar];
1731 break;
1732 case 0: /* implemented defined (only foreground) */
1733 case 1: /* transparent */
1734 case 3: /* direct color in CMY space */
1735 case 4: /* direct color in CMYK space */
1736 default:
1737 fprintf(stderr,
1738 "erresc(38): gfx attr %d unknown\n", attr[*npar]);
1739 break;
1740 }
1741
1742 return idx;
1743 }
1744
1745 void
1746 tsetattr(int *attr, int l) {
1747 int i;
1748 int32_t idx;
1749
1750 for(i = 0; i < l; i++) {
1751 switch(attr[i]) {
1752 case 0:
1753 term.c.attr.mode &= ~(
1754 ATTR_BOLD |
1755 ATTR_FAINT |
1756 ATTR_ITALIC |
1757 ATTR_UNDERLINE |
1758 ATTR_BLINK |
1759 ATTR_REVERSE |
1760 ATTR_INVISIBLE |
1761 ATTR_STRUCK );
1762 term.c.attr.fg = defaultfg;
1763 term.c.attr.bg = defaultbg;
1764 break;
1765 case 1:
1766 term.c.attr.mode |= ATTR_BOLD;
1767 break;
1768 case 2:
1769 term.c.attr.mode |= ATTR_FAINT;
1770 break;
1771 case 3:
1772 term.c.attr.mode |= ATTR_ITALIC;
1773 break;
1774 case 4:
1775 term.c.attr.mode |= ATTR_UNDERLINE;
1776 break;
1777 case 5: /* slow blink */
1778 /* FALLTHROUGH */
1779 case 6: /* rapid blink */
1780 term.c.attr.mode |= ATTR_BLINK;
1781 break;
1782 case 7:
1783 term.c.attr.mode |= ATTR_REVERSE;
1784 break;
1785 case 8:
1786 term.c.attr.mode |= ATTR_INVISIBLE;
1787 break;
1788 case 9:
1789 term.c.attr.mode |= ATTR_STRUCK;
1790 break;
1791 case 22:
1792 term.c.attr.mode &= ~(ATTR_BOLD | ATTR_FAINT);
1793 break;
1794 case 23:
1795 term.c.attr.mode &= ~ATTR_ITALIC;
1796 break;
1797 case 24:
1798 term.c.attr.mode &= ~ATTR_UNDERLINE;
1799 break;
1800 case 25:
1801 term.c.attr.mode &= ~ATTR_BLINK;
1802 break;
1803 case 27:
1804 term.c.attr.mode &= ~ATTR_REVERSE;
1805 break;
1806 case 28:
1807 term.c.attr.mode &= ~ATTR_INVISIBLE;
1808 break;
1809 case 29:
1810 term.c.attr.mode &= ~ATTR_STRUCK;
1811 break;
1812 case 38:
1813 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1814 term.c.attr.fg = idx;
1815 break;
1816 case 39:
1817 term.c.attr.fg = defaultfg;
1818 break;
1819 case 48:
1820 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1821 term.c.attr.bg = idx;
1822 break;
1823 case 49:
1824 term.c.attr.bg = defaultbg;
1825 break;
1826 default:
1827 if(BETWEEN(attr[i], 30, 37)) {
1828 term.c.attr.fg = attr[i] - 30;
1829 } else if(BETWEEN(attr[i], 40, 47)) {
1830 term.c.attr.bg = attr[i] - 40;
1831 } else if(BETWEEN(attr[i], 90, 97)) {
1832 term.c.attr.fg = attr[i] - 90 + 8;
1833 } else if(BETWEEN(attr[i], 100, 107)) {
1834 term.c.attr.bg = attr[i] - 100 + 8;
1835 } else {
1836 fprintf(stderr,
1837 "erresc(default): gfx attr %d unknown\n",
1838 attr[i]), csidump();
1839 }
1840 break;
1841 }
1842 }
1843 }
1844
1845 void
1846 tsetscroll(int t, int b) {
1847 int temp;
1848
1849 LIMIT(t, 0, term.row-1);
1850 LIMIT(b, 0, term.row-1);
1851 if(t > b) {
1852 temp = t;
1853 t = b;
1854 b = temp;
1855 }
1856 term.top = t;
1857 term.bot = b;
1858 }
1859
1860 void
1861 tsetmode(bool priv, bool set, int *args, int narg) {
1862 int *lim, mode;
1863 bool alt;
1864
1865 for(lim = args + narg; args < lim; ++args) {
1866 if(priv) {
1867 switch(*args) {
1868 case 1: /* DECCKM -- Cursor key */
1869 MODBIT(term.mode, set, MODE_APPCURSOR);
1870 break;
1871 case 5: /* DECSCNM -- Reverse video */
1872 mode = term.mode;
1873 MODBIT(term.mode, set, MODE_REVERSE);
1874 if(mode != term.mode)
1875 redraw();
1876 break;
1877 case 6: /* DECOM -- Origin */
1878 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1879 tmoveato(0, 0);
1880 break;
1881 case 7: /* DECAWM -- Auto wrap */
1882 MODBIT(term.mode, set, MODE_WRAP);
1883 break;
1884 case 0: /* Error (IGNORED) */
1885 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1886 case 3: /* DECCOLM -- Column (IGNORED) */
1887 case 4: /* DECSCLM -- Scroll (IGNORED) */
1888 case 8: /* DECARM -- Auto repeat (IGNORED) */
1889 case 18: /* DECPFF -- Printer feed (IGNORED) */
1890 case 19: /* DECPEX -- Printer extent (IGNORED) */
1891 case 42: /* DECNRCM -- National characters (IGNORED) */
1892 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1893 break;
1894 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1895 MODBIT(term.mode, !set, MODE_HIDE);
1896 break;
1897 case 9: /* X10 mouse compatibility mode */
1898 xsetpointermotion(0);
1899 MODBIT(term.mode, 0, MODE_MOUSE);
1900 MODBIT(term.mode, set, MODE_MOUSEX10);
1901 break;
1902 case 1000: /* 1000: report button press */
1903 xsetpointermotion(0);
1904 MODBIT(term.mode, 0, MODE_MOUSE);
1905 MODBIT(term.mode, set, MODE_MOUSEBTN);
1906 break;
1907 case 1002: /* 1002: report motion on button press */
1908 xsetpointermotion(0);
1909 MODBIT(term.mode, 0, MODE_MOUSE);
1910 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1911 break;
1912 case 1003: /* 1003: enable all mouse motions */
1913 xsetpointermotion(set);
1914 MODBIT(term.mode, 0, MODE_MOUSE);
1915 MODBIT(term.mode, set, MODE_MOUSEMANY);
1916 break;
1917 case 1004: /* 1004: send focus events to tty */
1918 MODBIT(term.mode, set, MODE_FOCUS);
1919 break;
1920 case 1006: /* 1006: extended reporting mode */
1921 MODBIT(term.mode, set, MODE_MOUSESGR);
1922 break;
1923 case 1034:
1924 MODBIT(term.mode, set, MODE_8BIT);
1925 break;
1926 case 1049: /* swap screen & set/restore cursor as xterm */
1927 if (!allowaltscreen)
1928 break;
1929 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1930 /* FALLTHROUGH */
1931 case 47: /* swap screen */
1932 case 1047:
1933 if (!allowaltscreen)
1934 break;
1935 alt = IS_SET(MODE_ALTSCREEN);
1936 if(alt) {
1937 tclearregion(0, 0, term.col-1,
1938 term.row-1);
1939 }
1940 if(set ^ alt) /* set is always 1 or 0 */
1941 tswapscreen();
1942 if(*args != 1049)
1943 break;
1944 /* FALLTHROUGH */
1945 case 1048:
1946 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1947 break;
1948 case 2004: /* 2004: bracketed paste mode */
1949 MODBIT(term.mode, set, MODE_BRCKTPASTE);
1950 break;
1951 /* Not implemented mouse modes. See comments there. */
1952 case 1001: /* mouse highlight mode; can hang the
1953 terminal by design when implemented. */
1954 case 1005: /* UTF-8 mouse mode; will confuse
1955 applications not supporting UTF-8
1956 and luit. */
1957 case 1015: /* urxvt mangled mouse mode; incompatible
1958 and can be mistaken for other control
1959 codes. */
1960 default:
1961 fprintf(stderr,
1962 "erresc: unknown private set/reset mode %d\n",
1963 *args);
1964 break;
1965 }
1966 } else {
1967 switch(*args) {
1968 case 0: /* Error (IGNORED) */
1969 break;
1970 case 2: /* KAM -- keyboard action */
1971 MODBIT(term.mode, set, MODE_KBDLOCK);
1972 break;
1973 case 4: /* IRM -- Insertion-replacement */
1974 MODBIT(term.mode, set, MODE_INSERT);
1975 break;
1976 case 12: /* SRM -- Send/Receive */
1977 MODBIT(term.mode, !set, MODE_ECHO);
1978 break;
1979 case 20: /* LNM -- Linefeed/new line */
1980 MODBIT(term.mode, set, MODE_CRLF);
1981 break;
1982 default:
1983 fprintf(stderr,
1984 "erresc: unknown set/reset mode %d\n",
1985 *args);
1986 break;
1987 }
1988 }
1989 }
1990 }
1991
1992 void
1993 csihandle(void) {
1994 char buf[40];
1995 int len;
1996
1997 switch(csiescseq.mode[0]) {
1998 default:
1999 unknown:
2000 fprintf(stderr, "erresc: unknown csi ");
2001 csidump();
2002 /* die(""); */
2003 break;
2004 case '@': /* ICH -- Insert <n> blank char */
2005 DEFAULT(csiescseq.arg[0], 1);
2006 tinsertblank(csiescseq.arg[0]);
2007 break;
2008 case 'A': /* CUU -- Cursor <n> Up */
2009 DEFAULT(csiescseq.arg[0], 1);
2010 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
2011 break;
2012 case 'B': /* CUD -- Cursor <n> Down */
2013 case 'e': /* VPR --Cursor <n> Down */
2014 DEFAULT(csiescseq.arg[0], 1);
2015 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
2016 break;
2017 case 'i': /* MC -- Media Copy */
2018 switch(csiescseq.arg[0]) {
2019 case 0:
2020 tdump();
2021 break;
2022 case 1:
2023 tdumpline(term.c.y);
2024 break;
2025 case 2:
2026 tdumpsel();
2027 break;
2028 case 4:
2029 term.mode &= ~MODE_PRINT;
2030 break;
2031 case 5:
2032 term.mode |= MODE_PRINT;
2033 break;
2034 }
2035 break;
2036 case 'c': /* DA -- Device Attributes */
2037 if(csiescseq.arg[0] == 0)
2038 ttywrite(vtiden, sizeof(vtiden) - 1);
2039 break;
2040 case 'C': /* CUF -- Cursor <n> Forward */
2041 case 'a': /* HPR -- Cursor <n> Forward */
2042 DEFAULT(csiescseq.arg[0], 1);
2043 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
2044 break;
2045 case 'D': /* CUB -- Cursor <n> Backward */
2046 DEFAULT(csiescseq.arg[0], 1);
2047 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
2048 break;
2049 case 'E': /* CNL -- Cursor <n> Down and first col */
2050 DEFAULT(csiescseq.arg[0], 1);
2051 tmoveto(0, term.c.y+csiescseq.arg[0]);
2052 break;
2053 case 'F': /* CPL -- Cursor <n> Up and first col */
2054 DEFAULT(csiescseq.arg[0], 1);
2055 tmoveto(0, term.c.y-csiescseq.arg[0]);
2056 break;
2057 case 'g': /* TBC -- Tabulation clear */
2058 switch(csiescseq.arg[0]) {
2059 case 0: /* clear current tab stop */
2060 term.tabs[term.c.x] = 0;
2061 break;
2062 case 3: /* clear all the tabs */
2063 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
2064 break;
2065 default:
2066 goto unknown;
2067 }
2068 break;
2069 case 'G': /* CHA -- Move to <col> */
2070 case '`': /* HPA */
2071 DEFAULT(csiescseq.arg[0], 1);
2072 tmoveto(csiescseq.arg[0]-1, term.c.y);
2073 break;
2074 case 'H': /* CUP -- Move to <row> <col> */
2075 case 'f': /* HVP */
2076 DEFAULT(csiescseq.arg[0], 1);
2077 DEFAULT(csiescseq.arg[1], 1);
2078 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
2079 break;
2080 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
2081 DEFAULT(csiescseq.arg[0], 1);
2082 tputtab(csiescseq.arg[0]);
2083 break;
2084 case 'J': /* ED -- Clear screen */
2085 selclear(NULL);
2086 switch(csiescseq.arg[0]) {
2087 case 0: /* below */
2088 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
2089 if(term.c.y < term.row-1) {
2090 tclearregion(0, term.c.y+1, term.col-1,
2091 term.row-1);
2092 }
2093 break;
2094 case 1: /* above */
2095 if(term.c.y > 1)
2096 tclearregion(0, 0, term.col-1, term.c.y-1);
2097 tclearregion(0, term.c.y, term.c.x, term.c.y);
2098 break;
2099 case 2: /* all */
2100 tclearregion(0, 0, term.col-1, term.row-1);
2101 break;
2102 default:
2103 goto unknown;
2104 }
2105 break;
2106 case 'K': /* EL -- Clear line */
2107 switch(csiescseq.arg[0]) {
2108 case 0: /* right */
2109 tclearregion(term.c.x, term.c.y, term.col-1,
2110 term.c.y);
2111 break;
2112 case 1: /* left */
2113 tclearregion(0, term.c.y, term.c.x, term.c.y);
2114 break;
2115 case 2: /* all */
2116 tclearregion(0, term.c.y, term.col-1, term.c.y);
2117 break;
2118 }
2119 break;
2120 case 'S': /* SU -- Scroll <n> line up */
2121 DEFAULT(csiescseq.arg[0], 1);
2122 tscrollup(term.top, csiescseq.arg[0]);
2123 break;
2124 case 'T': /* SD -- Scroll <n> line down */
2125 DEFAULT(csiescseq.arg[0], 1);
2126 tscrolldown(term.top, csiescseq.arg[0]);
2127 break;
2128 case 'L': /* IL -- Insert <n> blank lines */
2129 DEFAULT(csiescseq.arg[0], 1);
2130 tinsertblankline(csiescseq.arg[0]);
2131 break;
2132 case 'l': /* RM -- Reset Mode */
2133 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
2134 break;
2135 case 'M': /* DL -- Delete <n> lines */
2136 DEFAULT(csiescseq.arg[0], 1);
2137 tdeleteline(csiescseq.arg[0]);
2138 break;
2139 case 'X': /* ECH -- Erase <n> char */
2140 DEFAULT(csiescseq.arg[0], 1);
2141 tclearregion(term.c.x, term.c.y,
2142 term.c.x + csiescseq.arg[0] - 1, term.c.y);
2143 break;
2144 case 'P': /* DCH -- Delete <n> char */
2145 DEFAULT(csiescseq.arg[0], 1);
2146 tdeletechar(csiescseq.arg[0]);
2147 break;
2148 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
2149 DEFAULT(csiescseq.arg[0], 1);
2150 tputtab(-csiescseq.arg[0]);
2151 break;
2152 case 'd': /* VPA -- Move to <row> */
2153 DEFAULT(csiescseq.arg[0], 1);
2154 tmoveato(term.c.x, csiescseq.arg[0]-1);
2155 break;
2156 case 'h': /* SM -- Set terminal mode */
2157 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
2158 break;
2159 case 'm': /* SGR -- Terminal attribute (color) */
2160 tsetattr(csiescseq.arg, csiescseq.narg);
2161 break;
2162 case 'n': /* DSR – Device Status Report (cursor position) */
2163 if (csiescseq.arg[0] == 6) {
2164 len = snprintf(buf, sizeof(buf),"\033[%i;%iR",
2165 term.c.y+1, term.c.x+1);
2166 ttywrite(buf, len);
2167 }
2168 break;
2169 case 'r': /* DECSTBM -- Set Scrolling Region */
2170 if(csiescseq.priv) {
2171 goto unknown;
2172 } else {
2173 DEFAULT(csiescseq.arg[0], 1);
2174 DEFAULT(csiescseq.arg[1], term.row);
2175 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
2176 tmoveato(0, 0);
2177 }
2178 break;
2179 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
2180 tcursor(CURSOR_SAVE);
2181 break;
2182 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
2183 tcursor(CURSOR_LOAD);
2184 break;
2185 case ' ':
2186 switch (csiescseq.mode[1]) {
2187 case 'q': /* DECSCUSR -- Set Cursor Style */
2188 DEFAULT(csiescseq.arg[0], 1);
2189 if (!BETWEEN(csiescseq.arg[0], 0, 6)) {
2190 goto unknown;
2191 }
2192 xw.cursor = csiescseq.arg[0];
2193 break;
2194 default:
2195 goto unknown;
2196 }
2197 break;
2198 }
2199 }
2200
2201 void
2202 csidump(void) {
2203 int i;
2204 uint c;
2205
2206 printf("ESC[");
2207 for(i = 0; i < csiescseq.len; i++) {
2208 c = csiescseq.buf[i] & 0xff;
2209 if(isprint(c)) {
2210 putchar(c);
2211 } else if(c == '\n') {
2212 printf("(\\n)");
2213 } else if(c == '\r') {
2214 printf("(\\r)");
2215 } else if(c == 0x1b) {
2216 printf("(\\e)");
2217 } else {
2218 printf("(%02x)", c);
2219 }
2220 }
2221 putchar('\n');
2222 }
2223
2224 void
2225 csireset(void) {
2226 memset(&csiescseq, 0, sizeof(csiescseq));
2227 }
2228
2229 void
2230 strhandle(void) {
2231 char *p = NULL;
2232 int j, narg, par;
2233
2234 term.esc &= ~(ESC_STR_END|ESC_STR);
2235 strparse();
2236 narg = strescseq.narg;
2237 par = atoi(strescseq.args[0]);
2238
2239 switch(strescseq.type) {
2240 case ']': /* OSC -- Operating System Command */
2241 switch(par) {
2242 case 0:
2243 case 1:
2244 case 2:
2245 if(narg > 1)
2246 xsettitle(strescseq.args[1]);
2247 return;
2248 case 4: /* color set */
2249 if(narg < 3)
2250 break;
2251 p = strescseq.args[2];
2252 /* FALLTHROUGH */
2253 case 104: /* color reset, here p = NULL */
2254 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2255 if(xsetcolorname(j, p)) {
2256 fprintf(stderr, "erresc: invalid color %s\n", p);
2257 } else {
2258 /*
2259 * TODO if defaultbg color is changed, borders
2260 * are dirty
2261 */
2262 redraw();
2263 }
2264 return;
2265 }
2266 break;
2267 case 'k': /* old title set compatibility */
2268 xsettitle(strescseq.args[0]);
2269 return;
2270 case 'P': /* DCS -- Device Control String */
2271 case '_': /* APC -- Application Program Command */
2272 case '^': /* PM -- Privacy Message */
2273 return;
2274 }
2275
2276 fprintf(stderr, "erresc: unknown str ");
2277 strdump();
2278 }
2279
2280 void
2281 strparse(void) {
2282 int c;
2283 char *p = strescseq.buf;
2284
2285 strescseq.narg = 0;
2286 strescseq.buf[strescseq.len] = '\0';
2287
2288 if(*p == '\0')
2289 return;
2290
2291 while(strescseq.narg < STR_ARG_SIZ) {
2292 strescseq.args[strescseq.narg++] = p;
2293 while((c = *p) != ';' && c != '\0')
2294 ++p;
2295 if(c == '\0')
2296 return;
2297 *p++ = '\0';
2298 }
2299 }
2300
2301 void
2302 strdump(void) {
2303 int i;
2304 uint c;
2305
2306 printf("ESC%c", strescseq.type);
2307 for(i = 0; i < strescseq.len; i++) {
2308 c = strescseq.buf[i] & 0xff;
2309 if(c == '\0') {
2310 return;
2311 } else if(isprint(c)) {
2312 putchar(c);
2313 } else if(c == '\n') {
2314 printf("(\\n)");
2315 } else if(c == '\r') {
2316 printf("(\\r)");
2317 } else if(c == 0x1b) {
2318 printf("(\\e)");
2319 } else {
2320 printf("(%02x)", c);
2321 }
2322 }
2323 printf("ESC\\\n");
2324 }
2325
2326 void
2327 strreset(void) {
2328 memset(&strescseq, 0, sizeof(strescseq));
2329 }
2330
2331 void
2332 tprinter(char *s, size_t len) {
2333 if(iofd != -1 && xwrite(iofd, s, len) < 0) {
2334 fprintf(stderr, "Error writing in %s:%s\n",
2335 opt_io, strerror(errno));
2336 close(iofd);
2337 iofd = -1;
2338 }
2339 }
2340
2341 void
2342 toggleprinter(const Arg *arg) {
2343 term.mode ^= MODE_PRINT;
2344 }
2345
2346 void
2347 printscreen(const Arg *arg) {
2348 tdump();
2349 }
2350
2351 void
2352 printsel(const Arg *arg) {
2353 tdumpsel();
2354 }
2355
2356 void
2357 tdumpsel(void) {
2358 char *ptr;
2359
2360 if((ptr = getsel())) {
2361 tprinter(ptr, strlen(ptr));
2362 free(ptr);
2363 }
2364 }
2365
2366 void
2367 tdumpline(int n) {
2368 Glyph *bp, *end;
2369
2370 bp = &term.line[n][0];
2371 end = &bp[MIN(tlinelen(n), term.col) - 1];
2372 if(bp != end || bp->c[0] != ' ') {
2373 for( ;bp <= end; ++bp)
2374 tprinter(bp->c, utf8len(bp->c));
2375 }
2376 tprinter("\n", 1);
2377 }
2378
2379 void
2380 tdump(void) {
2381 int i;
2382
2383 for(i = 0; i < term.row; ++i)
2384 tdumpline(i);
2385 }
2386
2387 void
2388 tputtab(int n) {
2389 uint x = term.c.x;
2390
2391 if(n > 0) {
2392 while(x < term.col && n--)
2393 for(++x; x < term.col && !term.tabs[x]; ++x)
2394 /* nothing */ ;
2395 } else if(n < 0) {
2396 while(x > 0 && n++)
2397 for(--x; x > 0 && !term.tabs[x]; --x)
2398 /* nothing */ ;
2399 }
2400 term.c.x = LIMIT(x, 0, term.col-1);
2401 }
2402
2403 void
2404 techo(char *buf, int len) {
2405 for(; len > 0; buf++, len--) {
2406 char c = *buf;
2407
2408 if(ISCONTROL((uchar) c)) { /* control code */
2409 if(c & 0x80) {
2410 c &= 0x7f;
2411 tputc("^", 1);
2412 tputc("[", 1);
2413 } else if(c != '\n' && c != '\r' && c != '\t') {
2414 c ^= 0x40;
2415 tputc("^", 1);
2416 }
2417 tputc(&c, 1);
2418 } else {
2419 break;
2420 }
2421 }
2422 if(len)
2423 tputc(buf, len);
2424 }
2425
2426 void
2427 tdeftran(char ascii) {
2428 static char cs[] = "0B";
2429 static int vcs[] = {CS_GRAPHIC0, CS_USA};
2430 char *p;
2431
2432 if((p = strchr(cs, ascii)) == NULL) {
2433 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2434 } else {
2435 term.trantbl[term.icharset] = vcs[p - cs];
2436 }
2437 }
2438
2439 void
2440 tdectest(char c) {
2441 static char E[UTF_SIZ] = "E";
2442 int x, y;
2443
2444 if(c == '8') { /* DEC screen alignment test. */
2445 for(x = 0; x < term.col; ++x) {
2446 for(y = 0; y < term.row; ++y)
2447 tsetchar(E, &term.c.attr, x, y);
2448 }
2449 }
2450 }
2451
2452 void
2453 tstrsequence(uchar c) {
2454 if (c & 0x80) {
2455 switch (c) {
2456 case 0x90: /* DCS -- Device Control String */
2457 c = 'P';
2458 break;
2459 case 0x9f: /* APC -- Application Program Command */
2460 c = '_';
2461 break;
2462 case 0x9e: /* PM -- Privacy Message */
2463 c = '^';
2464 break;
2465 case 0x9d: /* OSC -- Operating System Command */
2466 c = ']';
2467 break;
2468 }
2469 }
2470 strreset();
2471 strescseq.type = c;
2472 term.esc |= ESC_STR;
2473 return;
2474 }
2475
2476 void
2477 tcontrolcode(uchar ascii) {
2478 static char question[UTF_SIZ] = "?";
2479
2480 switch(ascii) {
2481 case '\t': /* HT */
2482 tputtab(1);
2483 return;
2484 case '\b': /* BS */
2485 tmoveto(term.c.x-1, term.c.y);
2486 return;
2487 case '\r': /* CR */
2488 tmoveto(0, term.c.y);
2489 return;
2490 case '\f': /* LF */
2491 case '\v': /* VT */
2492 case '\n': /* LF */
2493 /* go to first col if the mode is set */
2494 tnewline(IS_SET(MODE_CRLF));
2495 return;
2496 case '\a': /* BEL */
2497 if(term.esc & ESC_STR_END) {
2498 /* backwards compatibility to xterm */
2499 strhandle();
2500 } else {
2501 if(!(xw.state & WIN_FOCUSED))
2502 xseturgency(1);
2503 if (bellvolume)
2504 XkbBell(xw.dpy, xw.win, bellvolume, (Atom)NULL);
2505 }
2506 break;
2507 case '\033': /* ESC */
2508 csireset();
2509 term.esc &= ~(ESC_CSI|ESC_ALTCHARSET|ESC_TEST);
2510 term.esc |= ESC_START;
2511 return;
2512 case '\016': /* SO (LS1 -- Locking shift 1) */
2513 case '\017': /* SI (LS0 -- Locking shift 0) */
2514 term.charset = 1 - (ascii - '\016');
2515 return;
2516 case '\032': /* SUB */
2517 tsetchar(question, &term.c.attr, term.c.x, term.c.y);
2518 case '\030': /* CAN */
2519 csireset();
2520 break;
2521 case '\005': /* ENQ (IGNORED) */
2522 case '\000': /* NUL (IGNORED) */
2523 case '\021': /* XON (IGNORED) */
2524 case '\023': /* XOFF (IGNORED) */
2525 case 0177: /* DEL (IGNORED) */
2526 return;
2527 case 0x84: /* TODO: IND */
2528 break;
2529 case 0x85: /* NEL -- Next line */
2530 tnewline(1); /* always go to first col */
2531 break;
2532 case 0x88: /* HTS -- Horizontal tab stop */
2533 term.tabs[term.c.x] = 1;
2534 break;
2535 case 0x8d: /* TODO: RI */
2536 case 0x8e: /* TODO: SS2 */
2537 case 0x8f: /* TODO: SS3 */
2538 case 0x98: /* TODO: SOS */
2539 break;
2540 case 0x9a: /* DECID -- Identify Terminal */
2541 ttywrite(vtiden, sizeof(vtiden) - 1);
2542 break;
2543 case 0x9b: /* TODO: CSI */
2544 case 0x9c: /* TODO: ST */
2545 break;
2546 case 0x90: /* DCS -- Device Control String */
2547 case 0x9f: /* APC -- Application Program Command */
2548 case 0x9e: /* PM -- Privacy Message */
2549 case 0x9d: /* OSC -- Operating System Command */
2550 tstrsequence(ascii);
2551 return;
2552 }
2553 /* only CAN, SUB, \a and C1 chars interrupt a sequence */
2554 term.esc &= ~(ESC_STR_END|ESC_STR);
2555 return;
2556 }
2557
2558 /*
2559 * returns 1 when the sequence is finished and it hasn't to read
2560 * more characters for this sequence, otherwise 0
2561 */
2562 int
2563 eschandle(uchar ascii) {
2564 switch(ascii) {
2565 case '[':
2566 term.esc |= ESC_CSI;
2567 return 0;
2568 case '#':
2569 term.esc |= ESC_TEST;
2570 return 0;
2571 case 'P': /* DCS -- Device Control String */
2572 case '_': /* APC -- Application Program Command */
2573 case '^': /* PM -- Privacy Message */
2574 case ']': /* OSC -- Operating System Command */
2575 case 'k': /* old title set compatibility */
2576 tstrsequence(ascii);
2577 return 0;
2578 case 'n': /* LS2 -- Locking shift 2 */
2579 case 'o': /* LS3 -- Locking shift 3 */
2580 term.charset = 2 + (ascii - 'n');
2581 break;
2582 case '(': /* GZD4 -- set primary charset G0 */
2583 case ')': /* G1D4 -- set secondary charset G1 */
2584 case '*': /* G2D4 -- set tertiary charset G2 */
2585 case '+': /* G3D4 -- set quaternary charset G3 */
2586 term.icharset = ascii - '(';
2587 term.esc |= ESC_ALTCHARSET;
2588 return 0;
2589 case 'D': /* IND -- Linefeed */
2590 if(term.c.y == term.bot) {
2591 tscrollup(term.top, 1);
2592 } else {
2593 tmoveto(term.c.x, term.c.y+1);
2594 }
2595 break;
2596 case 'E': /* NEL -- Next line */
2597 tnewline(1); /* always go to first col */
2598 break;
2599 case 'H': /* HTS -- Horizontal tab stop */
2600 term.tabs[term.c.x] = 1;
2601 break;
2602 case 'M': /* RI -- Reverse index */
2603 if(term.c.y == term.top) {
2604 tscrolldown(term.top, 1);
2605 } else {
2606 tmoveto(term.c.x, term.c.y-1);
2607 }
2608 break;
2609 case 'Z': /* DECID -- Identify Terminal */
2610 ttywrite(vtiden, sizeof(vtiden) - 1);
2611 break;
2612 case 'c': /* RIS -- Reset to inital state */
2613 treset();
2614 xresettitle();
2615 xloadcols();
2616 break;
2617 case '=': /* DECPAM -- Application keypad */
2618 term.mode |= MODE_APPKEYPAD;
2619 break;
2620 case '>': /* DECPNM -- Normal keypad */
2621 term.mode &= ~MODE_APPKEYPAD;
2622 break;
2623 case '7': /* DECSC -- Save Cursor */
2624 tcursor(CURSOR_SAVE);
2625 break;
2626 case '8': /* DECRC -- Restore Cursor */
2627 tcursor(CURSOR_LOAD);
2628 break;
2629 case '\\': /* ST -- String Terminator */
2630 if(term.esc & ESC_STR_END)
2631 strhandle();
2632 break;
2633 default:
2634 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2635 (uchar) ascii, isprint(ascii)? ascii:'.');
2636 break;
2637 }
2638 return 1;
2639 }
2640
2641 void
2642 tputc(char *c, int len) {
2643 uchar ascii;
2644 bool control;
2645 long unicodep;
2646 int width;
2647 Glyph *gp;
2648
2649 if(len == 1) {
2650 width = 1;
2651 unicodep = ascii = *c;
2652 } else {
2653 utf8decode(c, &unicodep, UTF_SIZ);
2654 if ((width = wcwidth(unicodep)) == -1) {
2655 c = "\357\277\275"; /* UTF_INVALID */
2656 width = 1;
2657 }
2658 ascii = unicodep;
2659 }
2660
2661 if(IS_SET(MODE_PRINT))
2662 tprinter(c, len);
2663 control = ISCONTROL(unicodep);
2664
2665 /*
2666 * STR sequence must be checked before anything else
2667 * because it uses all following characters until it
2668 * receives a ESC, a SUB, a ST or any other C1 control
2669 * character.
2670 */
2671 if(term.esc & ESC_STR) {
2672 if(len == 1 &&
2673 (ascii == '\a' || ascii == 030 ||
2674 ascii == 032 || ascii == 033 ||
2675 ISCONTROLC1(unicodep))) {
2676 term.esc &= ~(ESC_START|ESC_STR);
2677 term.esc |= ESC_STR_END;
2678 } else if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2679 memmove(&strescseq.buf[strescseq.len], c, len);
2680 strescseq.len += len;
2681 return;
2682 } else {
2683 /*
2684 * Here is a bug in terminals. If the user never sends
2685 * some code to stop the str or esc command, then st
2686 * will stop responding. But this is better than
2687 * silently failing with unknown characters. At least
2688 * then users will report back.
2689 *
2690 * In the case users ever get fixed, here is the code:
2691 */
2692 /*
2693 * term.esc = 0;
2694 * strhandle();
2695 */
2696 return;
2697 }
2698 }
2699
2700 /*
2701 * Actions of control codes must be performed as soon they arrive
2702 * because they can be embedded inside a control sequence, and
2703 * they must not cause conflicts with sequences.
2704 */
2705 if(control) {
2706 tcontrolcode(ascii);
2707 /*
2708 * control codes are not shown ever
2709 */
2710 return;
2711 } else if(term.esc & ESC_START) {
2712 if(term.esc & ESC_CSI) {
2713 csiescseq.buf[csiescseq.len++] = ascii;
2714 if(BETWEEN(ascii, 0x40, 0x7E)
2715 || csiescseq.len >= \
2716 sizeof(csiescseq.buf)-1) {
2717 term.esc = 0;
2718 csiparse();
2719 csihandle();
2720 }
2721 return;
2722 } else if(term.esc & ESC_ALTCHARSET) {
2723 tdeftran(ascii);
2724 } else if(term.esc & ESC_TEST) {
2725 tdectest(ascii);
2726 } else {
2727 if (!eschandle(ascii))
2728 return;
2729 /* sequence already finished */
2730 }
2731 term.esc = 0;
2732 /*
2733 * All characters which form part of a sequence are not
2734 * printed
2735 */
2736 return;
2737 }
2738 if(sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
2739 selclear(NULL);
2740
2741 gp = &term.line[term.c.y][term.c.x];
2742 if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2743 gp->mode |= ATTR_WRAP;
2744 tnewline(1);
2745 gp = &term.line[term.c.y][term.c.x];
2746 }
2747
2748 if(IS_SET(MODE_INSERT) && term.c.x+width < term.col)
2749 memmove(gp+width, gp, (term.col - term.c.x - width) * sizeof(Glyph));
2750
2751 if(term.c.x+width > term.col) {
2752 tnewline(1);
2753 gp = &term.line[term.c.y][term.c.x];
2754 }
2755
2756 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2757
2758 if(width == 2) {
2759 gp->mode |= ATTR_WIDE;
2760 if(term.c.x+1 < term.col) {
2761 gp[1].c[0] = '\0';
2762 gp[1].mode = ATTR_WDUMMY;
2763 }
2764 }
2765 if(term.c.x+width < term.col) {
2766 tmoveto(term.c.x+width, term.c.y);
2767 } else {
2768 term.c.state |= CURSOR_WRAPNEXT;
2769 }
2770 }
2771
2772 void
2773 tresize(int col, int row) {
2774 int i;
2775 int minrow = MIN(row, term.row);
2776 int mincol = MIN(col, term.col);
2777 int slide = term.c.y - row + 1;
2778 bool *bp;
2779 TCursor c;
2780
2781 if(col < 1 || row < 1) {
2782 fprintf(stderr,
2783 "tresize: error resizing to %dx%d\n", col, row);
2784 return;
2785 }
2786
2787 /* free unneeded rows */
2788 i = 0;
2789 if(slide > 0) {
2790 /*
2791 * slide screen to keep cursor where we expect it -
2792 * tscrollup would work here, but we can optimize to
2793 * memmove because we're freeing the earlier lines
2794 */
2795 for(/* i = 0 */; i < slide; i++) {
2796 free(term.line[i]);
2797 free(term.alt[i]);
2798 }
2799 memmove(term.line, term.line + slide, row * sizeof(Line));
2800 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2801 }
2802 for(i += row; i < term.row; i++) {
2803 free(term.line[i]);
2804 free(term.alt[i]);
2805 }
2806
2807 /* resize to new height */
2808 term.line = xrealloc(term.line, row * sizeof(Line));
2809 term.alt = xrealloc(term.alt, row * sizeof(Line));
2810 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2811 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2812
2813 /* resize each row to new width, zero-pad if needed */
2814 for(i = 0; i < minrow; i++) {
2815 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2816 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2817 }
2818
2819 /* allocate any new rows */
2820 for(/* i == minrow */; i < row; i++) {
2821 term.line[i] = xmalloc(col * sizeof(Glyph));
2822 term.alt[i] = xmalloc(col * sizeof(Glyph));
2823 }
2824 if(col > term.col) {
2825 bp = term.tabs + term.col;
2826
2827 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2828 while(--bp > term.tabs && !*bp)
2829 /* nothing */ ;
2830 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2831 *bp = 1;
2832 }
2833 /* update terminal size */
2834 term.col = col;
2835 term.row = row;
2836 /* reset scrolling region */
2837 tsetscroll(0, row-1);
2838 /* make use of the LIMIT in tmoveto */
2839 tmoveto(term.c.x, term.c.y);
2840 /* Clearing both screens (it makes dirty all lines) */
2841 c = term.c;
2842 for(i = 0; i < 2; i++) {
2843 if(mincol < col && 0 < minrow) {
2844 tclearregion(mincol, 0, col - 1, minrow - 1);
2845 }
2846 if(0 < col && minrow < row) {
2847 tclearregion(0, minrow, col - 1, row - 1);
2848 }
2849 tswapscreen();
2850 tcursor(CURSOR_LOAD);
2851 }
2852 term.c = c;
2853 }
2854
2855 void
2856 xresize(int col, int row) {
2857 xw.tw = MAX(1, col * xw.cw);
2858 xw.th = MAX(1, row * xw.ch);
2859
2860 XFreePixmap(xw.dpy, xw.buf);
2861 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2862 DefaultDepth(xw.dpy, xw.scr));
2863 XftDrawChange(xw.draw, xw.buf);
2864 xclear(0, 0, xw.w, xw.h);
2865 }
2866
2867 ushort
2868 sixd_to_16bit(int x) {
2869 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2870 }
2871
2872 void
2873 xloadcols(void) {
2874 int i;
2875 XRenderColor color = { .alpha = 0xffff };
2876 static bool loaded;
2877 Color *cp;
2878
2879 if(loaded) {
2880 for (cp = dc.col; cp < dc.col + LEN(dc.col); ++cp)
2881 XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
2882 }
2883
2884 /* load colors [0-15] and [256-LEN(colorname)] (config.h) */
2885 for(i = 0; i < LEN(colorname); i++) {
2886 if(!colorname[i])
2887 continue;
2888 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2889 die("Could not allocate color '%s'\n", colorname[i]);
2890 }
2891 }
2892
2893 /* load colors [16-231] ; same colors as xterm */
2894 for(i = 16; i < 6*6*6+16; i++) {
2895 color.red = sixd_to_16bit( ((i-16)/36)%6 );
2896 color.green = sixd_to_16bit( ((i-16)/6) %6 );
2897 color.blue = sixd_to_16bit( ((i-16)/1) %6 );
2898 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i]))
2899 die("Could not allocate color %d\n", i);
2900 }
2901
2902 /* load colors [232-255] ; grayscale */
2903 for(; i < 256; i++) {
2904 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (i-(6*6*6+16));
2905 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i]))
2906 die("Could not allocate color %d\n", i);
2907 }
2908 loaded = true;
2909 }
2910
2911 int
2912 xsetcolorname(int x, const char *name) {
2913 XRenderColor color = { .alpha = 0xffff };
2914 Color ncolor;
2915
2916 if(!BETWEEN(x, 0, LEN(colorname)))
2917 return 1;
2918
2919 if(!name) {
2920 if(BETWEEN(x, 16, 16 + 215)) { /* 256 color */
2921 color.red = sixd_to_16bit( ((x-16)/36)%6 );
2922 color.green = sixd_to_16bit( ((x-16)/6) %6 );
2923 color.blue = sixd_to_16bit( ((x-16)/1) %6 );
2924 if(!XftColorAllocValue(xw.dpy, xw.vis,
2925 xw.cmap, &color, &ncolor)) {
2926 return 1;
2927 }
2928
2929 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2930 dc.col[x] = ncolor;
2931 return 0;
2932 } else if(BETWEEN(x, 16 + 216, 255)) { /* greyscale */
2933 color.red = color.green = color.blue = \
2934 0x0808 + 0x0a0a * (x - (16 + 216));
2935 if(!XftColorAllocValue(xw.dpy, xw.vis,
2936 xw.cmap, &color, &ncolor)) {
2937 return 1;
2938 }
2939
2940 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2941 dc.col[x] = ncolor;
2942 return 0;
2943 } else { /* system colors */
2944 name = colorname[x];
2945 }
2946 }
2947 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &ncolor))
2948 return 1;
2949
2950 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2951 dc.col[x] = ncolor;
2952 return 0;
2953 }
2954
2955 void
2956 xtermclear(int col1, int row1, int col2, int row2) {
2957 XftDrawRect(xw.draw,
2958 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2959 borderpx + col1 * xw.cw,
2960 borderpx + row1 * xw.ch,
2961 (col2-col1+1) * xw.cw,
2962 (row2-row1+1) * xw.ch);
2963 }
2964
2965 /*
2966 * Absolute coordinates.
2967 */
2968 void
2969 xclear(int x1, int y1, int x2, int y2) {
2970 XftDrawRect(xw.draw,
2971 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2972 x1, y1, x2-x1, y2-y1);
2973 }
2974
2975 void
2976 xhints(void) {
2977 XClassHint class = {opt_class ? opt_class : termname, termname};
2978 XWMHints wm = {.flags = InputHint, .input = 1};
2979 XSizeHints *sizeh = NULL;
2980
2981 sizeh = XAllocSizeHints();
2982
2983 sizeh->flags = PSize | PResizeInc | PBaseSize;
2984 sizeh->height = xw.h;
2985 sizeh->width = xw.w;
2986 sizeh->height_inc = xw.ch;
2987 sizeh->width_inc = xw.cw;
2988 sizeh->base_height = 2 * borderpx;
2989 sizeh->base_width = 2 * borderpx;
2990 if(xw.isfixed == True) {
2991 sizeh->flags |= PMaxSize | PMinSize;
2992 sizeh->min_width = sizeh->max_width = xw.w;
2993 sizeh->min_height = sizeh->max_height = xw.h;
2994 }
2995 if(xw.gm & (XValue|YValue)) {
2996 sizeh->flags |= USPosition | PWinGravity;
2997 sizeh->x = xw.l;
2998 sizeh->y = xw.t;
2999 sizeh->win_gravity = xgeommasktogravity(xw.gm);
3000 }
3001
3002 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
3003 &class);
3004 XFree(sizeh);
3005 }
3006
3007 int
3008 xgeommasktogravity(int mask) {
3009 switch(mask & (XNegative|YNegative)) {
3010 case 0:
3011 return NorthWestGravity;
3012 case XNegative:
3013 return NorthEastGravity;
3014 case YNegative:
3015 return SouthWestGravity;
3016 }
3017 return SouthEastGravity;
3018 }
3019
3020 int
3021 xloadfont(Font *f, FcPattern *pattern) {
3022 FcPattern *match;
3023 FcResult result;
3024
3025 match = FcFontMatch(NULL, pattern, &result);
3026 if(!match)
3027 return 1;
3028
3029 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
3030 FcPatternDestroy(match);
3031 return 1;
3032 }
3033
3034 f->set = NULL;
3035 f->pattern = FcPatternDuplicate(pattern);
3036
3037 f->ascent = f->match->ascent;
3038 f->descent = f->match->descent;
3039 f->lbearing = 0;
3040 f->rbearing = f->match->max_advance_width;
3041
3042 f->height = f->ascent + f->descent;
3043 f->width = f->lbearing + f->rbearing;
3044
3045 return 0;
3046 }
3047
3048 void
3049 xloadfonts(char *fontstr, double fontsize) {
3050 FcPattern *pattern;
3051 FcResult r_sz, r_psz;
3052 double fontval;
3053 float ceilf(float);
3054
3055 if(fontstr[0] == '-') {
3056 pattern = XftXlfdParse(fontstr, False, False);
3057 } else {
3058 pattern = FcNameParse((FcChar8 *)fontstr);
3059 }
3060
3061 if(!pattern)
3062 die("st: can't open font %s\n", fontstr);
3063
3064 if(fontsize > 1) {
3065 FcPatternDel(pattern, FC_PIXEL_SIZE);
3066 FcPatternDel(pattern, FC_SIZE);
3067 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
3068 usedfontsize = fontsize;
3069 } else {
3070 r_psz = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
3071 r_sz = FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval);
3072 if(r_psz == FcResultMatch) {
3073 usedfontsize = fontval;
3074 } else if(r_sz == FcResultMatch) {
3075 usedfontsize = -1;
3076 } else {
3077 /*
3078 * Default font size is 12, if none given. This is to
3079 * have a known usedfontsize value.
3080 */
3081 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
3082 usedfontsize = 12;
3083 }
3084 defaultfontsize = usedfontsize;
3085 }
3086
3087 FcConfigSubstitute(0, pattern, FcMatchPattern);
3088 FcDefaultSubstitute(pattern);
3089
3090 if(xloadfont(&dc.font, pattern))
3091 die("st: can't open font %s\n", fontstr);
3092
3093 if(usedfontsize < 0) {
3094 FcPatternGetDouble(dc.font.match->pattern,
3095 FC_PIXEL_SIZE, 0, &fontval);
3096 usedfontsize = fontval;
3097 if(fontsize == 0)
3098 defaultfontsize = fontval;
3099 }
3100
3101 /* Setting character width and height. */
3102 xw.cw = ceilf(dc.font.width * cwscale);
3103 xw.ch = ceilf(dc.font.height * chscale);
3104
3105 FcPatternDel(pattern, FC_SLANT);
3106 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
3107 if(xloadfont(&dc.ifont, pattern))
3108 die("st: can't open font %s\n", fontstr);
3109
3110 FcPatternDel(pattern, FC_WEIGHT);
3111 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
3112 if(xloadfont(&dc.ibfont, pattern))
3113 die("st: can't open font %s\n", fontstr);
3114
3115 FcPatternDel(pattern, FC_SLANT);
3116 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
3117 if(xloadfont(&dc.bfont, pattern))
3118 die("st: can't open font %s\n", fontstr);
3119
3120 FcPatternDestroy(pattern);
3121 }
3122
3123 void
3124 xunloadfont(Font *f) {
3125 XftFontClose(xw.dpy, f->match);
3126 FcPatternDestroy(f->pattern);
3127 if(f->set)
3128 FcFontSetDestroy(f->set);
3129 }
3130
3131 void
3132 xunloadfonts(void) {
3133 /* Free the loaded fonts in the font cache. */
3134 while(frclen > 0)
3135 XftFontClose(xw.dpy, frc[--frclen].font);
3136
3137 xunloadfont(&dc.font);
3138 xunloadfont(&dc.bfont);
3139 xunloadfont(&dc.ifont);
3140 xunloadfont(&dc.ibfont);
3141 }
3142
3143 void
3144 xzoom(const Arg *arg) {
3145 Arg larg;
3146
3147 larg.i = usedfontsize + arg->i;
3148 xzoomabs(&larg);
3149 }
3150
3151 void
3152 xzoomabs(const Arg *arg) {
3153 xunloadfonts();
3154 xloadfonts(usedfont, arg->i);
3155 cresize(0, 0);
3156 redraw();
3157 xhints();
3158 }
3159
3160 void
3161 xzoomreset(const Arg *arg) {
3162 Arg larg;
3163
3164 if(defaultfontsize > 0) {
3165 larg.i = defaultfontsize;
3166 xzoomabs(&larg);
3167 }
3168 }
3169
3170 void
3171 xinit(void) {
3172 XGCValues gcvalues;
3173 Cursor cursor;
3174 Window parent;
3175 pid_t thispid = getpid();
3176
3177 if(!(xw.dpy = XOpenDisplay(NULL)))
3178 die("Can't open display\n");
3179 xw.scr = XDefaultScreen(xw.dpy);
3180 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
3181
3182 /* font */
3183 if(!FcInit())
3184 die("Could not init fontconfig.\n");
3185
3186 usedfont = (opt_font == NULL)? font : opt_font;
3187 xloadfonts(usedfont, 0);
3188
3189 /* colors */
3190 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
3191 xloadcols();
3192
3193 /* adjust fixed window geometry */
3194 xw.w = 2 * borderpx + term.col * xw.cw;
3195 xw.h = 2 * borderpx + term.row * xw.ch;
3196 if(xw.gm & XNegative)
3197 xw.l += DisplayWidth(xw.dpy, xw.scr) - xw.w - 2;
3198 if(xw.gm & YNegative)
3199 xw.t += DisplayWidth(xw.dpy, xw.scr) - xw.h - 2;
3200
3201 /* Events */
3202 xw.attrs.background_pixel = dc.col[defaultbg].pixel;
3203 xw.attrs.border_pixel = dc.col[defaultbg].pixel;
3204 xw.attrs.bit_gravity = NorthWestGravity;
3205 xw.attrs.event_mask = FocusChangeMask | KeyPressMask
3206 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
3207 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
3208 xw.attrs.colormap = xw.cmap;
3209
3210 if (!(opt_embed && (parent = strtol(opt_embed, NULL, 0))))
3211 parent = XRootWindow(xw.dpy, xw.scr);
3212 xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
3213 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
3214 xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
3215 | CWEventMask | CWColormap, &xw.attrs);
3216
3217 memset(&gcvalues, 0, sizeof(gcvalues));
3218 gcvalues.graphics_exposures = False;
3219 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
3220 &gcvalues);
3221 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
3222 DefaultDepth(xw.dpy, xw.scr));
3223 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
3224 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
3225
3226 /* Xft rendering context */
3227 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
3228
3229 /* input methods */
3230 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3231 XSetLocaleModifiers("@im=local");
3232 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3233 XSetLocaleModifiers("@im=");
3234 if((xw.xim = XOpenIM(xw.dpy,
3235 NULL, NULL, NULL)) == NULL) {
3236 die("XOpenIM failed. Could not open input"
3237 " device.\n");
3238 }
3239 }
3240 }
3241 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
3242 | XIMStatusNothing, XNClientWindow, xw.win,
3243 XNFocusWindow, xw.win, NULL);
3244 if(xw.xic == NULL)
3245 die("XCreateIC failed. Could not obtain input method.\n");
3246
3247 /* white cursor, black outline */
3248 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
3249 XDefineCursor(xw.dpy, xw.win, cursor);
3250 XRecolorCursor(xw.dpy, cursor,
3251 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
3252 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
3253
3254 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
3255 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
3256 xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
3257 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
3258
3259 xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
3260 XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
3261 PropModeReplace, (uchar *)&thispid, 1);
3262
3263 xresettitle();
3264 XMapWindow(xw.dpy, xw.win);
3265 xhints();
3266 XSync(xw.dpy, False);
3267 }
3268
3269 void
3270 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
3271 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
3272 width = charlen * xw.cw, xp, i;
3273 int frcflags, charexists;
3274 int u8fl, u8fblen, u8cblen, doesexist;
3275 char *u8c, *u8fs;
3276 long unicodep;
3277 Font *font = &dc.font;
3278 FcResult fcres;
3279 FcPattern *fcpattern, *fontpattern;
3280 FcFontSet *fcsets[] = { NULL };
3281 FcCharSet *fccharset;
3282 Color *fg, *bg, *temp, revfg, revbg, truefg, truebg;
3283 XRenderColor colfg, colbg;
3284 XRectangle r;
3285 int oneatatime;
3286
3287 frcflags = FRC_NORMAL;
3288
3289 if(base.mode & ATTR_ITALIC) {
3290 if(base.fg == defaultfg)
3291 base.fg = defaultitalic;
3292 font = &dc.ifont;
3293 frcflags = FRC_ITALIC;
3294 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
3295 if(base.fg == defaultfg)
3296 base.fg = defaultitalic;
3297 font = &dc.ibfont;
3298 frcflags = FRC_ITALICBOLD;
3299 } else if(base.mode & ATTR_UNDERLINE) {
3300 if(base.fg == defaultfg)
3301 base.fg = defaultunderline;
3302 }
3303
3304 if(IS_TRUECOL(base.fg)) {
3305 colfg.alpha = 0xffff;
3306 colfg.red = TRUERED(base.fg);
3307 colfg.green = TRUEGREEN(base.fg);
3308 colfg.blue = TRUEBLUE(base.fg);
3309 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
3310 fg = &truefg;
3311 } else {
3312 fg = &dc.col[base.fg];
3313 }
3314
3315 if(IS_TRUECOL(base.bg)) {
3316 colbg.alpha = 0xffff;
3317 colbg.green = TRUEGREEN(base.bg);
3318 colbg.red = TRUERED(base.bg);
3319 colbg.blue = TRUEBLUE(base.bg);
3320 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
3321 bg = &truebg;
3322 } else {
3323 bg = &dc.col[base.bg];
3324 }
3325
3326 if(base.mode & ATTR_BOLD) {
3327 /*
3328 * change basic system colors [0-7]
3329 * to bright system colors [8-15]
3330 */
3331 if(BETWEEN(base.fg, 0, 7) && !(base.mode & ATTR_FAINT))
3332 fg = &dc.col[base.fg + 8];
3333
3334 if(base.mode & ATTR_ITALIC) {
3335 font = &dc.ibfont;
3336 frcflags = FRC_ITALICBOLD;
3337 } else {
3338 font = &dc.bfont;
3339 frcflags = FRC_BOLD;
3340 }
3341 }
3342
3343 if(IS_SET(MODE_REVERSE)) {
3344 if(fg == &dc.col[defaultfg]) {
3345 fg = &dc.col[defaultbg];
3346 } else {
3347 colfg.red = ~fg->color.red;
3348 colfg.green = ~fg->color.green;
3349 colfg.blue = ~fg->color.blue;
3350 colfg.alpha = fg->color.alpha;
3351 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
3352 &revfg);
3353 fg = &revfg;
3354 }
3355
3356 if(bg == &dc.col[defaultbg]) {
3357 bg = &dc.col[defaultfg];
3358 } else {
3359 colbg.red = ~bg->color.red;
3360 colbg.green = ~bg->color.green;
3361 colbg.blue = ~bg->color.blue;
3362 colbg.alpha = bg->color.alpha;
3363 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
3364 &revbg);
3365 bg = &revbg;
3366 }
3367 }
3368
3369 if(base.mode & ATTR_REVERSE) {
3370 temp = fg;
3371 fg = bg;
3372 bg = temp;
3373 }
3374
3375 if(base.mode & ATTR_FAINT && !(base.mode & ATTR_BOLD)) {
3376 colfg.red = fg->color.red / 2;
3377 colfg.green = fg->color.green / 2;
3378 colfg.blue = fg->color.blue / 2;
3379 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
3380 fg = &revfg;
3381 }
3382
3383 if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
3384 fg = bg;
3385
3386 if(base.mode & ATTR_INVISIBLE)
3387 fg = bg;
3388
3389 /* Intelligent cleaning up of the borders. */
3390 if(x == 0) {
3391 xclear(0, (y == 0)? 0 : winy, borderpx,
3392 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
3393 }
3394 if(x + charlen >= term.col) {
3395 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
3396 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
3397 }
3398 if(y == 0)
3399 xclear(winx, 0, winx + width, borderpx);
3400 if(y == term.row-1)
3401 xclear(winx, winy + xw.ch, winx + width, xw.h);
3402
3403 /* Clean up the region we want to draw to. */
3404 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
3405
3406 /* Set the clip region because Xft is sometimes dirty. */
3407 r.x = 0;
3408 r.y = 0;
3409 r.height = xw.ch;
3410 r.width = width;
3411 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
3412
3413 for(xp = winx; bytelen > 0;) {
3414 /*
3415 * Search for the range in the to be printed string of glyphs
3416 * that are in the main font. Then print that range. If
3417 * some glyph is found that is not in the font, do the
3418 * fallback dance.
3419 */
3420 u8fs = s;
3421 u8fblen = 0;
3422 u8fl = 0;
3423 oneatatime = font->width != xw.cw;
3424 for(;;) {
3425 u8c = s;
3426 u8cblen = utf8decode(s, &unicodep, UTF_SIZ);
3427 s += u8cblen;
3428 bytelen -= u8cblen;
3429
3430 doesexist = XftCharExists(xw.dpy, font->match, unicodep);
3431 if(doesexist) {
3432 u8fl++;
3433 u8fblen += u8cblen;
3434 if(!oneatatime && bytelen > 0)
3435 continue;
3436 }
3437
3438 if(u8fl > 0) {
3439 XftDrawStringUtf8(xw.draw, fg,
3440 font->match, xp,
3441 winy + font->ascent,
3442 (FcChar8 *)u8fs,
3443 u8fblen);
3444 xp += xw.cw * u8fl;
3445 }
3446 break;
3447 }
3448 if(doesexist) {
3449 if(oneatatime)
3450 continue;
3451 break;
3452 }
3453
3454 /* Search the font cache. */
3455 for(i = 0; i < frclen; i++) {
3456 charexists = XftCharExists(xw.dpy, frc[i].font, unicodep);
3457 /* Everything correct. */
3458 if(charexists && frc[i].flags == frcflags)
3459 break;
3460 /* We got a default font for a not found glyph. */
3461 if(!charexists && frc[i].flags == frcflags \
3462 && frc[i].unicodep == unicodep) {
3463 break;
3464 }
3465 }
3466
3467 /* Nothing was found. */
3468 if(i >= frclen) {
3469 if(!font->set)
3470 font->set = FcFontSort(0, font->pattern,
3471 FcTrue, 0, &fcres);
3472 fcsets[0] = font->set;
3473
3474 /*
3475 * Nothing was found in the cache. Now use
3476 * some dozen of Fontconfig calls to get the
3477 * font for one single character.
3478 *
3479 * Xft and fontconfig are design failures.
3480 */
3481 fcpattern = FcPatternDuplicate(font->pattern);
3482 fccharset = FcCharSetCreate();
3483
3484 FcCharSetAddChar(fccharset, unicodep);
3485 FcPatternAddCharSet(fcpattern, FC_CHARSET,
3486 fccharset);
3487 FcPatternAddBool(fcpattern, FC_SCALABLE,
3488 FcTrue);
3489
3490 FcConfigSubstitute(0, fcpattern,
3491 FcMatchPattern);
3492 FcDefaultSubstitute(fcpattern);
3493
3494 fontpattern = FcFontSetMatch(0, fcsets, 1,
3495 fcpattern, &fcres);
3496
3497 /*
3498 * Overwrite or create the new cache entry.
3499 */
3500 if(frclen >= LEN(frc)) {
3501 frclen = LEN(frc) - 1;
3502 XftFontClose(xw.dpy, frc[frclen].font);
3503 frc[frclen].unicodep = 0;
3504 }
3505
3506 frc[frclen].font = XftFontOpenPattern(xw.dpy,
3507 fontpattern);
3508 frc[frclen].flags = frcflags;
3509 frc[frclen].unicodep = unicodep;
3510
3511 i = frclen;
3512 frclen++;
3513
3514 FcPatternDestroy(fcpattern);
3515 FcCharSetDestroy(fccharset);
3516 }
3517
3518 XftDrawStringUtf8(xw.draw, fg, frc[i].font,
3519 xp, winy + frc[i].font->ascent,
3520 (FcChar8 *)u8c, u8cblen);
3521
3522 xp += xw.cw * wcwidth(unicodep);
3523 }
3524
3525 /*
3526 * This is how the loop above actually should be. Why does the
3527 * application have to care about font details?
3528 *
3529 * I have to repeat: Xft and Fontconfig are design failures.
3530 */
3531 /*
3532 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
3533 winy + font->ascent, (FcChar8 *)s, bytelen);
3534 */
3535
3536 if(base.mode & ATTR_UNDERLINE) {
3537 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
3538 width, 1);
3539 }
3540
3541 if(base.mode & ATTR_STRUCK) {
3542 XftDrawRect(xw.draw, fg, winx, winy + 2 * font->ascent / 3,
3543 width, 1);
3544 }
3545
3546 /* Reset clip to none. */
3547 XftDrawSetClip(xw.draw, 0);
3548 }
3549
3550 void
3551 xdrawcursor(void) {
3552 static int oldx = 0, oldy = 0;
3553 int sl, width, curx;
3554 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
3555
3556 LIMIT(oldx, 0, term.col-1);
3557 LIMIT(oldy, 0, term.row-1);
3558
3559 curx = term.c.x;
3560
3561 /* adjust position if in dummy */
3562 if(term.line[oldy][oldx].mode & ATTR_WDUMMY)
3563 oldx--;
3564 if(term.line[term.c.y][curx].mode & ATTR_WDUMMY)
3565 curx--;
3566
3567 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
3568
3569 /* remove the old cursor */
3570 sl = utf8len(term.line[oldy][oldx].c);
3571 width = (term.line[oldy][oldx].mode & ATTR_WIDE)? 2 : 1;
3572 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
3573 oldy, width, sl);
3574
3575 if(IS_SET(MODE_HIDE))
3576 return;
3577
3578 /* draw the new one */
3579 if(xw.state & WIN_FOCUSED) {
3580 switch (xw.cursor) {
3581 case 0: /* Blinking Block */
3582 case 1: /* Blinking Block (Default) */
3583 case 2: /* Steady Block */
3584 if(IS_SET(MODE_REVERSE)) {
3585 g.mode |= ATTR_REVERSE;
3586 g.fg = defaultcs;
3587 g.bg = defaultfg;
3588 }
3589
3590 sl = utf8len(g.c);
3591 width = (term.line[term.c.y][curx].mode & ATTR_WIDE)\
3592 ? 2 : 1;
3593 xdraws(g.c, g, term.c.x, term.c.y, width, sl);
3594 break;
3595 case 3: /* Blinking Underline */
3596 case 4: /* Steady Underline */
3597 XftDrawRect(xw.draw, &dc.col[defaultcs],
3598 borderpx + curx * xw.cw,
3599 borderpx + (term.c.y + 1) * xw.ch - cursorthickness,
3600 xw.cw, cursorthickness);
3601 break;
3602 case 5: /* Blinking bar */
3603 case 6: /* Steady bar */
3604 XftDrawRect(xw.draw, &dc.col[defaultcs],
3605 borderpx + curx * xw.cw,
3606 borderpx + term.c.y * xw.ch,
3607 cursorthickness, xw.ch);
3608 break;
3609 }
3610 } else {
3611 XftDrawRect(xw.draw, &dc.col[defaultcs],
3612 borderpx + curx * xw.cw,
3613 borderpx + term.c.y * xw.ch,
3614 xw.cw - 1, 1);
3615 XftDrawRect(xw.draw, &dc.col[defaultcs],
3616 borderpx + curx * xw.cw,
3617 borderpx + term.c.y * xw.ch,
3618 1, xw.ch - 1);
3619 XftDrawRect(xw.draw, &dc.col[defaultcs],
3620 borderpx + (curx + 1) * xw.cw - 1,
3621 borderpx + term.c.y * xw.ch,
3622 1, xw.ch - 1);
3623 XftDrawRect(xw.draw, &dc.col[defaultcs],
3624 borderpx + curx * xw.cw,
3625 borderpx + (term.c.y + 1) * xw.ch - 1,
3626 xw.cw, 1);
3627 }
3628 oldx = curx, oldy = term.c.y;
3629 }
3630
3631
3632 void
3633 xsettitle(char *p) {
3634 XTextProperty prop;
3635
3636 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3637 &prop);
3638 XSetWMName(xw.dpy, xw.win, &prop);
3639 XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
3640 XFree(prop.value);
3641 }
3642
3643 void
3644 xresettitle(void) {
3645 xsettitle(opt_title ? opt_title : "st");
3646 }
3647
3648 void
3649 redraw(void) {
3650 tfulldirt();
3651 draw();
3652 }
3653
3654 void
3655 draw(void) {
3656 drawregion(0, 0, term.col, term.row);
3657 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3658 xw.h, 0, 0);
3659 XSetForeground(xw.dpy, dc.gc,
3660 dc.col[IS_SET(MODE_REVERSE)?
3661 defaultfg : defaultbg].pixel);
3662 }
3663
3664 void
3665 drawregion(int x1, int y1, int x2, int y2) {
3666 int ic, ib, x, y, ox, sl;
3667 Glyph base, new;
3668 char buf[DRAW_BUF_SIZ];
3669 bool ena_sel = sel.ob.x != -1 && sel.alt == IS_SET(MODE_ALTSCREEN);
3670 long unicodep;
3671
3672 if(!(xw.state & WIN_VISIBLE))
3673 return;
3674
3675 for(y = y1; y < y2; y++) {
3676 if(!term.dirty[y])
3677 continue;
3678
3679 xtermclear(0, y, term.col, y);
3680 term.dirty[y] = 0;
3681 base = term.line[y][0];
3682 ic = ib = ox = 0;
3683 for(x = x1; x < x2; x++) {
3684 new = term.line[y][x];
3685 if(new.mode == ATTR_WDUMMY)
3686 continue;
3687 if(ena_sel && selected(x, y))
3688 new.mode ^= ATTR_REVERSE;
3689 if(ib > 0 && (ATTRCMP(base, new)
3690 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3691 xdraws(buf, base, ox, y, ic, ib);
3692 ic = ib = 0;
3693 }
3694 if(ib == 0) {
3695 ox = x;
3696 base = new;
3697 }
3698
3699 sl = utf8decode(new.c, &unicodep, UTF_SIZ);
3700 memcpy(buf+ib, new.c, sl);
3701 ib += sl;
3702 ic += (new.mode & ATTR_WIDE)? 2 : 1;
3703 }
3704 if(ib > 0)
3705 xdraws(buf, base, ox, y, ic, ib);
3706 }
3707 xdrawcursor();
3708 }
3709
3710 void
3711 expose(XEvent *ev) {
3712 XExposeEvent *e = &ev->xexpose;
3713
3714 if(xw.state & WIN_REDRAW) {
3715 if(!e->count)
3716 xw.state &= ~WIN_REDRAW;
3717 }
3718 redraw();
3719 }
3720
3721 void
3722 visibility(XEvent *ev) {
3723 XVisibilityEvent *e = &ev->xvisibility;
3724
3725 if(e->state == VisibilityFullyObscured) {
3726 xw.state &= ~WIN_VISIBLE;
3727 } else if(!(xw.state & WIN_VISIBLE)) {
3728 /* need a full redraw for next Expose, not just a buf copy */
3729 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3730 }
3731 }
3732
3733 void
3734 unmap(XEvent *ev) {
3735 xw.state &= ~WIN_VISIBLE;
3736 }
3737
3738 void
3739 xsetpointermotion(int set) {
3740 MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
3741 XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
3742 }
3743
3744 void
3745 xseturgency(int add) {
3746 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3747
3748 MODBIT(h->flags, add, XUrgencyHint);
3749 XSetWMHints(xw.dpy, xw.win, h);
3750 XFree(h);
3751 }
3752
3753 void
3754 focus(XEvent *ev) {
3755 XFocusChangeEvent *e = &ev->xfocus;
3756
3757 if(e->mode == NotifyGrab)
3758 return;
3759
3760 if(ev->type == FocusIn) {
3761 XSetICFocus(xw.xic);
3762 xw.state |= WIN_FOCUSED;
3763 xseturgency(0);
3764 if(IS_SET(MODE_FOCUS))
3765 ttywrite("\033[I", 3);
3766 } else {
3767 XUnsetICFocus(xw.xic);
3768 xw.state &= ~WIN_FOCUSED;
3769 if(IS_SET(MODE_FOCUS))
3770 ttywrite("\033[O", 3);
3771 }
3772 }
3773
3774 bool
3775 match(uint mask, uint state) {
3776 return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
3777 }
3778
3779 void
3780 numlock(const Arg *dummy) {
3781 term.numlock ^= 1;
3782 }
3783
3784 char*
3785 kmap(KeySym k, uint state) {
3786 Key *kp;
3787 int i;
3788
3789 /* Check for mapped keys out of X11 function keys. */
3790 for(i = 0; i < LEN(mappedkeys); i++) {
3791 if(mappedkeys[i] == k)
3792 break;
3793 }
3794 if(i == LEN(mappedkeys)) {
3795 if((k & 0xFFFF) < 0xFD00)
3796 return NULL;
3797 }
3798
3799 for(kp = key; kp < key + LEN(key); kp++) {
3800 if(kp->k != k)
3801 continue;
3802
3803 if(!match(kp->mask, state))
3804 continue;
3805
3806 if(IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
3807 continue;
3808 if(term.numlock && kp->appkey == 2)
3809 continue;
3810
3811 if(IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
3812 continue;
3813
3814 if(IS_SET(MODE_CRLF) ? kp->crlf < 0 : kp->crlf > 0)
3815 continue;
3816
3817 return kp->s;
3818 }
3819
3820 return NULL;
3821 }
3822
3823 void
3824 kpress(XEvent *ev) {
3825 XKeyEvent *e = &ev->xkey;
3826 KeySym ksym;
3827 char buf[32], *customkey;
3828 int len;
3829 long c;
3830 Status status;
3831 Shortcut *bp;
3832
3833 if(IS_SET(MODE_KBDLOCK))
3834 return;
3835
3836 len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
3837 /* 1. shortcuts */
3838 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3839 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3840 bp->func(&(bp->arg));
3841 return;
3842 }
3843 }
3844
3845 /* 2. custom keys from config.h */
3846 if((customkey = kmap(ksym, e->state))) {
3847 ttysend(customkey, strlen(customkey));
3848 return;
3849 }
3850
3851 /* 3. composed string from input method */
3852 if(len == 0)
3853 return;
3854 if(len == 1 && e->state & Mod1Mask) {
3855 if(IS_SET(MODE_8BIT)) {
3856 if(*buf < 0177) {
3857 c = *buf | 0x80;
3858 len = utf8encode(c, buf, UTF_SIZ);
3859 }
3860 } else {
3861 buf[1] = buf[0];
3862 buf[0] = '\033';
3863 len = 2;
3864 }
3865 }
3866 ttysend(buf, len);
3867 }
3868
3869
3870 void
3871 cmessage(XEvent *e) {
3872 /*
3873 * See xembed specs
3874 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3875 */
3876 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3877 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3878 xw.state |= WIN_FOCUSED;
3879 xseturgency(0);
3880 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3881 xw.state &= ~WIN_FOCUSED;
3882 }
3883 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3884 /* Send SIGHUP to shell */
3885 kill(pid, SIGHUP);
3886 exit(EXIT_SUCCESS);
3887 }
3888 }
3889
3890 void
3891 cresize(int width, int height) {
3892 int col, row;
3893
3894 if(width != 0)
3895 xw.w = width;
3896 if(height != 0)
3897 xw.h = height;
3898
3899 col = (xw.w - 2 * borderpx) / xw.cw;
3900 row = (xw.h - 2 * borderpx) / xw.ch;
3901
3902 tresize(col, row);
3903 xresize(col, row);
3904 ttyresize();
3905 }
3906
3907 void
3908 resize(XEvent *e) {
3909 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3910 return;
3911
3912 cresize(e->xconfigure.width, e->xconfigure.height);
3913 }
3914
3915 void
3916 run(void) {
3917 XEvent ev;
3918 int w = xw.w, h = xw.h;
3919 fd_set rfd;
3920 int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3921 struct timespec drawtimeout, *tv = NULL, now, last, lastblink;
3922 long deltatime;
3923
3924 /* Waiting for window mapping */
3925 while(1) {
3926 XNextEvent(xw.dpy, &ev);
3927 if(XFilterEvent(&ev, None))
3928 continue;
3929 if(ev.type == ConfigureNotify) {
3930 w = ev.xconfigure.width;
3931 h = ev.xconfigure.height;
3932 } else if(ev.type == MapNotify) {
3933 break;
3934 }
3935 }
3936
3937 ttynew();
3938 cresize(w, h);
3939
3940 clock_gettime(CLOCK_MONOTONIC, &last);
3941 lastblink = last;
3942
3943 for(xev = actionfps;;) {
3944 FD_ZERO(&rfd);
3945 FD_SET(cmdfd, &rfd);
3946 FD_SET(xfd, &rfd);
3947
3948 if(pselect(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv, NULL) < 0) {
3949 if(errno == EINTR)
3950 continue;
3951 die("select failed: %s\n", strerror(errno));
3952 }
3953 if(FD_ISSET(cmdfd, &rfd)) {
3954 ttyread();
3955 if(blinktimeout) {
3956 blinkset = tattrset(ATTR_BLINK);
3957 if(!blinkset)
3958 MODBIT(term.mode, 0, MODE_BLINK);
3959 }
3960 }
3961
3962 if(FD_ISSET(xfd, &rfd))
3963 xev = actionfps;
3964
3965 clock_gettime(CLOCK_MONOTONIC, &now);
3966 drawtimeout.tv_sec = 0;
3967 drawtimeout.tv_nsec = (1000/xfps) * 1E6;
3968 tv = &drawtimeout;
3969
3970 dodraw = 0;
3971 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
3972 tsetdirtattr(ATTR_BLINK);
3973 term.mode ^= MODE_BLINK;
3974 lastblink = now;
3975 dodraw = 1;
3976 }
3977 deltatime = TIMEDIFF(now, last);
3978 if(deltatime > (xev? (1000/xfps) : (1000/actionfps))
3979 || deltatime < 0) {
3980 dodraw = 1;
3981 last = now;
3982 }
3983
3984 if(dodraw) {
3985 while(XPending(xw.dpy)) {
3986 XNextEvent(xw.dpy, &ev);
3987 if(XFilterEvent(&ev, None))
3988 continue;
3989 if(handler[ev.type])
3990 (handler[ev.type])(&ev);
3991 }
3992
3993 draw();
3994 XFlush(xw.dpy);
3995
3996 if(xev && !FD_ISSET(xfd, &rfd))
3997 xev--;
3998 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
3999 if(blinkset) {
4000 if(TIMEDIFF(now, lastblink) \
4001 > blinktimeout) {
4002 drawtimeout.tv_nsec = 1000;
4003 } else {
4004 drawtimeout.tv_nsec = (1E6 * \
4005 (blinktimeout - \
4006 TIMEDIFF(now,
4007 lastblink)));
4008 }
4009 drawtimeout.tv_sec = \
4010 drawtimeout.tv_nsec / 1E9;
4011 drawtimeout.tv_nsec %= (long)1E9;
4012 } else {
4013 tv = NULL;
4014 }
4015 }
4016 }
4017 }
4018 }
4019
4020 void
4021 usage(void) {
4022 die("%s " VERSION " (c) 2010-2015 st engineers\n" \
4023 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]\n"
4024 " [-i] [-t title] [-w windowid] [-e command ...]\n", argv0);
4025 }
4026
4027 int
4028 main(int argc, char *argv[]) {
4029 char *titles;
4030 uint cols = 80, rows = 24;
4031
4032 xw.l = xw.t = 0;
4033 xw.isfixed = False;
4034 xw.cursor = 0;
4035
4036 ARGBEGIN {
4037 case 'a':
4038 allowaltscreen = false;
4039 break;
4040 case 'c':
4041 opt_class = EARGF(usage());
4042 break;
4043 case 'e':
4044 /* eat all remaining arguments */
4045 if(argc > 1) {
4046 opt_cmd = &argv[1];
4047 if(argv[1] != NULL && opt_title == NULL) {
4048 titles = xstrdup(argv[1]);
4049 opt_title = basename(titles);
4050 }
4051 }
4052 goto run;
4053 case 'f':
4054 opt_font = EARGF(usage());
4055 break;
4056 case 'g':
4057 xw.gm = XParseGeometry(EARGF(usage()),
4058 &xw.l, &xw.t, &cols, &rows);
4059 break;
4060 case 'i':
4061 xw.isfixed = True;
4062 break;
4063 case 'o':
4064 opt_io = EARGF(usage());
4065 break;
4066 case 't':
4067 opt_title = EARGF(usage());
4068 break;
4069 case 'w':
4070 opt_embed = EARGF(usage());
4071 break;
4072 case 'v':
4073 default:
4074 usage();
4075 } ARGEND;
4076
4077 run:
4078 setlocale(LC_CTYPE, "");
4079 XSetLocaleModifiers("");
4080 tnew(MAX(cols, 1), MAX(rows, 1));
4081 xinit();
4082 selinit();
4083 run();
4084
4085 return 0;
4086 }
4087