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68dc2be75d8dab4dbfbb094d4f10eafec9c9ace1
[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 ascii);
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 c);
410
411 static void xdraws(char *, Glyph, int, int, int, int);
412 static void xhints(void);
413 static void xclear(int, int, int, int);
414 static void xdrawcursor(void);
415 static void xinit(void);
416 static void xloadcols(void);
417 static int xsetcolorname(int, const char *);
418 static int xgeommasktogravity(int);
419 static int xloadfont(Font *, FcPattern *);
420 static void xloadfonts(char *, double);
421 static int xloadfontset(Font *);
422 static void xsettitle(char *);
423 static void xresettitle(void);
424 static void xsetpointermotion(int);
425 static void xseturgency(int);
426 static void xsetsel(char *);
427 static void xtermclear(int, int, int, int);
428 static void xunloadfont(Font *);
429 static void xunloadfonts(void);
430 static void xresize(int, int);
431
432 static void expose(XEvent *);
433 static void visibility(XEvent *);
434 static void unmap(XEvent *);
435 static char *kmap(KeySym, uint);
436 static void kpress(XEvent *);
437 static void cmessage(XEvent *);
438 static void cresize(int, int);
439 static void resize(XEvent *);
440 static void focus(XEvent *);
441 static void brelease(XEvent *);
442 static void bpress(XEvent *);
443 static void bmotion(XEvent *);
444 static void selnotify(XEvent *);
445 static void selclear(XEvent *);
446 static void selrequest(XEvent *);
447
448 static void selinit(void);
449 static void selnormalize(void);
450 static inline bool selected(int, int);
451 static char *getsel(void);
452 static void selcopy(void);
453 static void selscroll(int, int);
454 static void selsnap(int, int *, int *, int);
455 static void getbuttoninfo(XEvent *);
456 static void mousereport(XEvent *);
457
458 static size_t utf8decode(char *, long *, size_t);
459 static long utf8decodebyte(char, size_t *);
460 static size_t utf8encode(long, char *, size_t);
461 static char utf8encodebyte(long, size_t);
462 static size_t utf8len(char *);
463 static size_t utf8validate(long *, size_t);
464
465 static ssize_t xwrite(int, const char *, size_t);
466 static void *xmalloc(size_t);
467 static void *xrealloc(void *, size_t);
468 static char *xstrdup(char *);
469
470 static void usage(void);
471
472 static void (*handler[LASTEvent])(XEvent *) = {
473 [KeyPress] = kpress,
474 [ClientMessage] = cmessage,
475 [ConfigureNotify] = resize,
476 [VisibilityNotify] = visibility,
477 [UnmapNotify] = unmap,
478 [Expose] = expose,
479 [FocusIn] = focus,
480 [FocusOut] = focus,
481 [MotionNotify] = bmotion,
482 [ButtonPress] = bpress,
483 [ButtonRelease] = brelease,
484 /*
485 * Uncomment if you want the selection to disappear when you select something
486 * different in another window.
487 */
488 /* [SelectionClear] = selclear, */
489 [SelectionNotify] = selnotify,
490 [SelectionRequest] = selrequest,
491 };
492
493 /* Globals */
494 static DC dc;
495 static XWindow xw;
496 static Term term;
497 static CSIEscape csiescseq;
498 static STREscape strescseq;
499 static int cmdfd;
500 static pid_t pid;
501 static Selection sel;
502 static int iofd = STDOUT_FILENO;
503 static char **opt_cmd = NULL;
504 static char *opt_io = NULL;
505 static char *opt_title = NULL;
506 static char *opt_embed = NULL;
507 static char *opt_class = NULL;
508 static char *opt_font = NULL;
509 static int oldbutton = 3; /* button event on startup: 3 = release */
510
511 static char *usedfont = NULL;
512 static double usedfontsize = 0;
513 static double defaultfontsize = 0;
514
515 static uchar utfbyte[UTF_SIZ + 1] = {0x80, 0, 0xC0, 0xE0, 0xF0};
516 static uchar utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
517 static long utfmin[UTF_SIZ + 1] = { 0, 0, 0x80, 0x800, 0x10000};
518 static long utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
519
520 /* Font Ring Cache */
521 enum {
522 FRC_NORMAL,
523 FRC_ITALIC,
524 FRC_BOLD,
525 FRC_ITALICBOLD
526 };
527
528 typedef struct {
529 XftFont *font;
530 int flags;
531 long unicodep;
532 } Fontcache;
533
534 /* Fontcache is an array now. A new font will be appended to the array. */
535 static Fontcache frc[16];
536 static int frclen = 0;
537
538 ssize_t
539 xwrite(int fd, const char *s, size_t len) {
540 size_t aux = len;
541
542 while(len > 0) {
543 ssize_t r = write(fd, s, len);
544 if(r < 0)
545 return r;
546 len -= r;
547 s += r;
548 }
549 return aux;
550 }
551
552 void *
553 xmalloc(size_t len) {
554 void *p = malloc(len);
555
556 if(!p)
557 die("Out of memory\n");
558
559 return p;
560 }
561
562 void *
563 xrealloc(void *p, size_t len) {
564 if((p = realloc(p, len)) == NULL)
565 die("Out of memory\n");
566
567 return p;
568 }
569
570 char *
571 xstrdup(char *s) {
572 if((s = strdup(s)) == NULL)
573 die("Out of memory\n");
574
575 return s;
576 }
577
578 size_t
579 utf8decode(char *c, long *u, size_t clen) {
580 size_t i, j, len, type;
581 long udecoded;
582
583 *u = UTF_INVALID;
584 if(!clen)
585 return 0;
586 udecoded = utf8decodebyte(c[0], &len);
587 if(!BETWEEN(len, 1, UTF_SIZ))
588 return 1;
589 for(i = 1, j = 1; i < clen && j < len; ++i, ++j) {
590 udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
591 if(type != 0)
592 return j;
593 }
594 if(j < len)
595 return 0;
596 *u = udecoded;
597 utf8validate(u, len);
598 return len;
599 }
600
601 long
602 utf8decodebyte(char c, size_t *i) {
603 for(*i = 0; *i < LEN(utfmask); ++(*i))
604 if(((uchar)c & utfmask[*i]) == utfbyte[*i])
605 return (uchar)c & ~utfmask[*i];
606 return 0;
607 }
608
609 size_t
610 utf8encode(long u, char *c, size_t clen) {
611 size_t len, i;
612
613 len = utf8validate(&u, 0);
614 if(clen < len)
615 return 0;
616 for(i = len - 1; i != 0; --i) {
617 c[i] = utf8encodebyte(u, 0);
618 u >>= 6;
619 }
620 c[0] = utf8encodebyte(u, len);
621 return len;
622 }
623
624 char
625 utf8encodebyte(long u, size_t i) {
626 return utfbyte[i] | (u & ~utfmask[i]);
627 }
628
629 size_t
630 utf8len(char *c) {
631 return utf8decode(c, &(long){0}, UTF_SIZ);
632 }
633
634 size_t
635 utf8validate(long *u, size_t i) {
636 if(!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF))
637 *u = UTF_INVALID;
638 for(i = 1; *u > utfmax[i]; ++i)
639 ;
640 return i;
641 }
642
643 static void
644 selinit(void) {
645 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
646 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
647 sel.mode = 0;
648 sel.ob.x = -1;
649 sel.primary = NULL;
650 sel.clipboard = NULL;
651 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
652 if(sel.xtarget == None)
653 sel.xtarget = XA_STRING;
654 }
655
656 static int
657 x2col(int x) {
658 x -= borderpx;
659 x /= xw.cw;
660
661 return LIMIT(x, 0, term.col-1);
662 }
663
664 static int
665 y2row(int y) {
666 y -= borderpx;
667 y /= xw.ch;
668
669 return LIMIT(y, 0, term.row-1);
670 }
671
672 static int tlinelen(int y) {
673 int i = term.col;
674
675 if(term.line[y][i - 1].mode & ATTR_WRAP)
676 return i;
677
678 while(i > 0 && term.line[y][i - 1].c[0] == ' ')
679 --i;
680
681 return i;
682 }
683
684 static void
685 selnormalize(void) {
686 int i;
687
688 if(sel.ob.y == sel.oe.y || sel.type == SEL_RECTANGULAR) {
689 sel.nb.x = MIN(sel.ob.x, sel.oe.x);
690 sel.ne.x = MAX(sel.ob.x, sel.oe.x);
691 } else {
692 sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
693 sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
694 }
695 sel.nb.y = MIN(sel.ob.y, sel.oe.y);
696 sel.ne.y = MAX(sel.ob.y, sel.oe.y);
697
698 selsnap(sel.snap, &sel.nb.x, &sel.nb.y, -1);
699 selsnap(sel.snap, &sel.ne.x, &sel.ne.y, +1);
700
701 /* expand selection over line breaks */
702 if (sel.type == SEL_RECTANGULAR)
703 return;
704 i = tlinelen(sel.nb.y);
705 if (i < sel.nb.x)
706 sel.nb.x = i;
707 if (tlinelen(sel.ne.y) <= sel.ne.x)
708 sel.ne.x = term.col - 1;
709 }
710
711 static inline bool
712 selected(int x, int y) {
713 if(sel.type == SEL_RECTANGULAR)
714 return BETWEEN(y, sel.nb.y, sel.ne.y)
715 && BETWEEN(x, sel.nb.x, sel.ne.x);
716
717 return BETWEEN(y, sel.nb.y, sel.ne.y)
718 && (y != sel.nb.y || x >= sel.nb.x)
719 && (y != sel.ne.y || x <= sel.ne.x);
720 }
721
722 void
723 selsnap(int mode, int *x, int *y, int direction) {
724 int newx, newy, xt, yt;
725 bool delim, prevdelim;
726 Glyph *gp, *prevgp;
727
728 switch(mode) {
729 case SNAP_WORD:
730 /*
731 * Snap around if the word wraps around at the end or
732 * beginning of a line.
733 */
734 prevgp = &term.line[*y][*x];
735 prevdelim = strchr(worddelimiters, prevgp->c[0]) != NULL;
736 for(;;) {
737 newx = *x + direction;
738 newy = *y;
739 if(!BETWEEN(newx, 0, term.col - 1)) {
740 newy += direction;
741 newx = (newx + term.col) % term.col;
742 if (!BETWEEN(newy, 0, term.row - 1))
743 break;
744
745 if(direction > 0)
746 yt = *y, xt = *x;
747 else
748 yt = newy, xt = newx;
749 if(!(term.line[yt][xt].mode & ATTR_WRAP))
750 break;
751 }
752
753 if (newx >= tlinelen(newy))
754 break;
755
756 gp = &term.line[newy][newx];
757 delim = strchr(worddelimiters, gp->c[0]) != NULL;
758 if(!(gp->mode & ATTR_WDUMMY) && (delim != prevdelim
759 || (delim && gp->c[0] != prevgp->c[0])))
760 break;
761
762 *x = newx;
763 *y = newy;
764 prevgp = gp;
765 prevdelim = delim;
766 }
767 break;
768 case SNAP_LINE:
769 /*
770 * Snap around if the the previous line or the current one
771 * has set ATTR_WRAP at its end. Then the whole next or
772 * previous line will be selected.
773 */
774 *x = (direction < 0) ? 0 : term.col - 1;
775 if(direction < 0 && *y > 0) {
776 for(; *y > 0; *y += direction) {
777 if(!(term.line[*y-1][term.col-1].mode
778 & ATTR_WRAP)) {
779 break;
780 }
781 }
782 } else if(direction > 0 && *y < term.row-1) {
783 for(; *y < term.row; *y += direction) {
784 if(!(term.line[*y][term.col-1].mode
785 & ATTR_WRAP)) {
786 break;
787 }
788 }
789 }
790 break;
791 }
792 }
793
794 void
795 getbuttoninfo(XEvent *e) {
796 int type;
797 uint state = e->xbutton.state & ~(Button1Mask | forceselmod);
798
799 sel.alt = IS_SET(MODE_ALTSCREEN);
800
801 sel.oe.x = x2col(e->xbutton.x);
802 sel.oe.y = y2row(e->xbutton.y);
803 selnormalize();
804
805 sel.type = SEL_REGULAR;
806 for(type = 1; type < LEN(selmasks); ++type) {
807 if(match(selmasks[type], state)) {
808 sel.type = type;
809 break;
810 }
811 }
812 }
813
814 void
815 mousereport(XEvent *e) {
816 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
817 button = e->xbutton.button, state = e->xbutton.state,
818 len;
819 char buf[40];
820 static int ox, oy;
821
822 /* from urxvt */
823 if(e->xbutton.type == MotionNotify) {
824 if(x == ox && y == oy)
825 return;
826 if(!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
827 return;
828 /* MOUSE_MOTION: no reporting if no button is pressed */
829 if(IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
830 return;
831
832 button = oldbutton + 32;
833 ox = x;
834 oy = y;
835 } else {
836 if(!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
837 button = 3;
838 } else {
839 button -= Button1;
840 if(button >= 3)
841 button += 64 - 3;
842 }
843 if(e->xbutton.type == ButtonPress) {
844 oldbutton = button;
845 ox = x;
846 oy = y;
847 } else if(e->xbutton.type == ButtonRelease) {
848 oldbutton = 3;
849 /* MODE_MOUSEX10: no button release reporting */
850 if(IS_SET(MODE_MOUSEX10))
851 return;
852 if (button == 64 || button == 65)
853 return;
854 }
855 }
856
857 if(!IS_SET(MODE_MOUSEX10)) {
858 button += (state & ShiftMask ? 4 : 0)
859 + (state & Mod4Mask ? 8 : 0)
860 + (state & ControlMask ? 16 : 0);
861 }
862
863 len = 0;
864 if(IS_SET(MODE_MOUSESGR)) {
865 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
866 button, x+1, y+1,
867 e->xbutton.type == ButtonRelease ? 'm' : 'M');
868 } else if(x < 223 && y < 223) {
869 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
870 32+button, 32+x+1, 32+y+1);
871 } else {
872 return;
873 }
874
875 ttywrite(buf, len);
876 }
877
878 void
879 bpress(XEvent *e) {
880 struct timespec now;
881 Mousekey *mk;
882
883 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
884 mousereport(e);
885 return;
886 }
887
888 for(mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
889 if(e->xbutton.button == mk->b
890 && match(mk->mask, e->xbutton.state)) {
891 ttysend(mk->s, strlen(mk->s));
892 return;
893 }
894 }
895
896 if(e->xbutton.button == Button1) {
897 clock_gettime(CLOCK_MONOTONIC, &now);
898
899 /* Clear previous selection, logically and visually. */
900 selclear(NULL);
901 sel.mode = 1;
902 sel.type = SEL_REGULAR;
903 sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
904 sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
905
906 /*
907 * If the user clicks below predefined timeouts specific
908 * snapping behaviour is exposed.
909 */
910 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
911 sel.snap = SNAP_LINE;
912 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
913 sel.snap = SNAP_WORD;
914 } else {
915 sel.snap = 0;
916 }
917 selnormalize();
918
919 /*
920 * Draw selection, unless it's regular and we don't want to
921 * make clicks visible
922 */
923 if(sel.snap != 0) {
924 sel.mode++;
925 tsetdirt(sel.nb.y, sel.ne.y);
926 }
927 sel.tclick2 = sel.tclick1;
928 sel.tclick1 = now;
929 }
930 }
931
932 char *
933 getsel(void) {
934 char *str, *ptr;
935 int y, bufsize, size, lastx, linelen;
936 Glyph *gp, *last;
937
938 if(sel.ob.x == -1)
939 return NULL;
940
941 bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
942 ptr = str = xmalloc(bufsize);
943
944 /* append every set & selected glyph to the selection */
945 for(y = sel.nb.y; y < sel.ne.y + 1; y++) {
946 linelen = tlinelen(y);
947
948 if(sel.type == SEL_RECTANGULAR) {
949 gp = &term.line[y][sel.nb.x];
950 lastx = sel.ne.x;
951 } else {
952 gp = &term.line[y][sel.nb.y == y ? sel.nb.x : 0];
953 lastx = (sel.ne.y == y) ? sel.ne.x : term.col-1;
954 }
955 last = &term.line[y][MIN(lastx, linelen-1)];
956 while(last >= gp && last->c[0] == ' ')
957 --last;
958
959 for( ; gp <= last; ++gp) {
960 if(gp->mode & ATTR_WDUMMY)
961 continue;
962
963 size = utf8len(gp->c);
964 memcpy(ptr, gp->c, size);
965 ptr += size;
966 }
967
968 /*
969 * Copy and pasting of line endings is inconsistent
970 * in the inconsistent terminal and GUI world.
971 * The best solution seems like to produce '\n' when
972 * something is copied from st and convert '\n' to
973 * '\r', when something to be pasted is received by
974 * st.
975 * FIXME: Fix the computer world.
976 */
977 if((y < sel.ne.y || lastx >= linelen) && !(last->mode & ATTR_WRAP))
978 *ptr++ = '\n';
979 }
980 *ptr = 0;
981 return str;
982 }
983
984 void
985 selcopy(void) {
986 xsetsel(getsel());
987 }
988
989 void
990 selnotify(XEvent *e) {
991 ulong nitems, ofs, rem;
992 int format;
993 uchar *data, *last, *repl;
994 Atom type;
995 XSelectionEvent *xsev;
996
997 ofs = 0;
998 xsev = (XSelectionEvent *)e;
999 if (xsev->property == None)
1000 return;
1001 do {
1002 if(XGetWindowProperty(xw.dpy, xw.win, xsev->property, ofs,
1003 BUFSIZ/4, False, AnyPropertyType,
1004 &type, &format, &nitems, &rem,
1005 &data)) {
1006 fprintf(stderr, "Clipboard allocation failed\n");
1007 return;
1008 }
1009
1010 /*
1011 * As seen in getsel:
1012 * Line endings are inconsistent in the terminal and GUI world
1013 * copy and pasting. When receiving some selection data,
1014 * replace all '\n' with '\r'.
1015 * FIXME: Fix the computer world.
1016 */
1017 repl = data;
1018 last = data + nitems * format / 8;
1019 while((repl = memchr(repl, '\n', last - repl))) {
1020 *repl++ = '\r';
1021 }
1022
1023 if(IS_SET(MODE_BRCKTPASTE))
1024 ttywrite("\033[200~", 6);
1025 ttysend((char *)data, nitems * format / 8);
1026 if(IS_SET(MODE_BRCKTPASTE))
1027 ttywrite("\033[201~", 6);
1028 XFree(data);
1029 /* number of 32-bit chunks returned */
1030 ofs += nitems * format / 32;
1031 } while(rem > 0);
1032 }
1033
1034 void
1035 selpaste(const Arg *dummy) {
1036 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
1037 xw.win, CurrentTime);
1038 }
1039
1040 void
1041 clipcopy(const Arg *dummy) {
1042 Atom clipboard;
1043
1044 if(sel.clipboard != NULL)
1045 free(sel.clipboard);
1046
1047 if(sel.primary != NULL) {
1048 sel.clipboard = xstrdup(sel.primary);
1049 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1050 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
1051 }
1052 }
1053
1054 void
1055 clippaste(const Arg *dummy) {
1056 Atom clipboard;
1057
1058 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1059 XConvertSelection(xw.dpy, clipboard, sel.xtarget, clipboard,
1060 xw.win, CurrentTime);
1061 }
1062
1063 void
1064 selclear(XEvent *e) {
1065 if(sel.ob.x == -1)
1066 return;
1067 sel.ob.x = -1;
1068 tsetdirt(sel.nb.y, sel.ne.y);
1069 }
1070
1071 void
1072 selrequest(XEvent *e) {
1073 XSelectionRequestEvent *xsre;
1074 XSelectionEvent xev;
1075 Atom xa_targets, string, clipboard;
1076 char *seltext;
1077
1078 xsre = (XSelectionRequestEvent *) e;
1079 xev.type = SelectionNotify;
1080 xev.requestor = xsre->requestor;
1081 xev.selection = xsre->selection;
1082 xev.target = xsre->target;
1083 xev.time = xsre->time;
1084 /* reject */
1085 xev.property = None;
1086
1087 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
1088 if(xsre->target == xa_targets) {
1089 /* respond with the supported type */
1090 string = sel.xtarget;
1091 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1092 XA_ATOM, 32, PropModeReplace,
1093 (uchar *) &string, 1);
1094 xev.property = xsre->property;
1095 } else if(xsre->target == sel.xtarget || xsre->target == XA_STRING) {
1096 /*
1097 * xith XA_STRING non ascii characters may be incorrect in the
1098 * requestor. It is not our problem, use utf8.
1099 */
1100 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1101 if(xsre->selection == XA_PRIMARY) {
1102 seltext = sel.primary;
1103 } else if(xsre->selection == clipboard) {
1104 seltext = sel.clipboard;
1105 } else {
1106 fprintf(stderr,
1107 "Unhandled clipboard selection 0x%lx\n",
1108 xsre->selection);
1109 return;
1110 }
1111 if(seltext != NULL) {
1112 XChangeProperty(xsre->display, xsre->requestor,
1113 xsre->property, xsre->target,
1114 8, PropModeReplace,
1115 (uchar *)seltext, strlen(seltext));
1116 xev.property = xsre->property;
1117 }
1118 }
1119
1120 /* all done, send a notification to the listener */
1121 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
1122 fprintf(stderr, "Error sending SelectionNotify event\n");
1123 }
1124
1125 void
1126 xsetsel(char *str) {
1127 free(sel.primary);
1128 sel.primary = str;
1129
1130 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
1131 }
1132
1133 void
1134 brelease(XEvent *e) {
1135 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1136 mousereport(e);
1137 return;
1138 }
1139
1140 if(e->xbutton.button == Button2) {
1141 selpaste(NULL);
1142 } else if(e->xbutton.button == Button1) {
1143 if(sel.mode < 2) {
1144 selclear(NULL);
1145 } else {
1146 getbuttoninfo(e);
1147 selcopy();
1148 }
1149 sel.mode = 0;
1150 tsetdirt(sel.nb.y, sel.ne.y);
1151 }
1152 }
1153
1154 void
1155 bmotion(XEvent *e) {
1156 int oldey, oldex, oldsby, oldsey;
1157
1158 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1159 mousereport(e);
1160 return;
1161 }
1162
1163 if(!sel.mode)
1164 return;
1165
1166 sel.mode++;
1167 oldey = sel.oe.y;
1168 oldex = sel.oe.x;
1169 oldsby = sel.nb.y;
1170 oldsey = sel.ne.y;
1171 getbuttoninfo(e);
1172
1173 if(oldey != sel.oe.y || oldex != sel.oe.x)
1174 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
1175 }
1176
1177 void
1178 die(const char *errstr, ...) {
1179 va_list ap;
1180
1181 va_start(ap, errstr);
1182 vfprintf(stderr, errstr, ap);
1183 va_end(ap);
1184 exit(EXIT_FAILURE);
1185 }
1186
1187 void
1188 execsh(void) {
1189 char **args, *sh, *prog;
1190 const struct passwd *pw;
1191 char buf[sizeof(long) * 8 + 1];
1192
1193 errno = 0;
1194 if((pw = getpwuid(getuid())) == NULL) {
1195 if(errno)
1196 die("getpwuid:%s\n", strerror(errno));
1197 else
1198 die("who are you?\n");
1199 }
1200
1201 if (!(sh = getenv("SHELL"))) {
1202 sh = (pw->pw_shell[0]) ? pw->pw_shell : shell;
1203 }
1204
1205 if(opt_cmd)
1206 prog = opt_cmd[0];
1207 else if(utmp)
1208 prog = utmp;
1209 else
1210 prog = sh;
1211 args = (opt_cmd) ? opt_cmd : (char *[]) {prog, NULL};
1212
1213 snprintf(buf, sizeof(buf), "%lu", xw.win);
1214
1215 unsetenv("COLUMNS");
1216 unsetenv("LINES");
1217 unsetenv("TERMCAP");
1218 setenv("LOGNAME", pw->pw_name, 1);
1219 setenv("USER", pw->pw_name, 1);
1220 setenv("SHELL", sh, 1);
1221 setenv("HOME", pw->pw_dir, 1);
1222 setenv("TERM", termname, 1);
1223 setenv("WINDOWID", buf, 1);
1224
1225 signal(SIGCHLD, SIG_DFL);
1226 signal(SIGHUP, SIG_DFL);
1227 signal(SIGINT, SIG_DFL);
1228 signal(SIGQUIT, SIG_DFL);
1229 signal(SIGTERM, SIG_DFL);
1230 signal(SIGALRM, SIG_DFL);
1231
1232 execvp(prog, args);
1233 _exit(EXIT_FAILURE);
1234 }
1235
1236 void
1237 sigchld(int a) {
1238 int stat, ret;
1239
1240 if(waitpid(pid, &stat, 0) < 0)
1241 die("Waiting for pid %hd failed: %s\n", pid, strerror(errno));
1242
1243 ret = WIFEXITED(stat) ? WEXITSTATUS(stat) : EXIT_FAILURE;
1244 if (ret != EXIT_SUCCESS)
1245 die("child finished with error '%d'\n", stat);
1246 exit(EXIT_SUCCESS);
1247 }
1248
1249 void
1250 ttynew(void) {
1251 int m, s;
1252 struct winsize w = {term.row, term.col, 0, 0};
1253
1254 /* seems to work fine on linux, openbsd and freebsd */
1255 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1256 die("openpty failed: %s\n", strerror(errno));
1257
1258 switch(pid = fork()) {
1259 case -1:
1260 die("fork failed\n");
1261 break;
1262 case 0:
1263 setsid(); /* create a new process group */
1264 dup2(s, STDIN_FILENO);
1265 dup2(s, STDOUT_FILENO);
1266 dup2(s, STDERR_FILENO);
1267 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1268 die("ioctl TIOCSCTTY failed: %s\n", strerror(errno));
1269 close(s);
1270 close(m);
1271 execsh();
1272 break;
1273 default:
1274 close(s);
1275 cmdfd = m;
1276 signal(SIGCHLD, sigchld);
1277 if(opt_io) {
1278 term.mode |= MODE_PRINT;
1279 iofd = (!strcmp(opt_io, "-")) ?
1280 STDOUT_FILENO :
1281 open(opt_io, O_WRONLY | O_CREAT, 0666);
1282 if(iofd < 0) {
1283 fprintf(stderr, "Error opening %s:%s\n",
1284 opt_io, strerror(errno));
1285 }
1286 }
1287 break;
1288 }
1289 }
1290
1291 void
1292 ttyread(void) {
1293 static char buf[BUFSIZ];
1294 static int buflen = 0;
1295 char *ptr;
1296 char s[UTF_SIZ];
1297 int charsize; /* size of utf8 char in bytes */
1298 long unicodep;
1299 int ret;
1300
1301 /* append read bytes to unprocessed bytes */
1302 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1303 die("Couldn't read from shell: %s\n", strerror(errno));
1304
1305 /* process every complete utf8 char */
1306 buflen += ret;
1307 ptr = buf;
1308 while((charsize = utf8decode(ptr, &unicodep, buflen))) {
1309 utf8encode(unicodep, s, UTF_SIZ);
1310 tputc(s, charsize);
1311 ptr += charsize;
1312 buflen -= charsize;
1313 }
1314
1315 /* keep any uncomplete utf8 char for the next call */
1316 memmove(buf, ptr, buflen);
1317 }
1318
1319 void
1320 ttywrite(const char *s, size_t n) {
1321 if(xwrite(cmdfd, s, n) == -1)
1322 die("write error on tty: %s\n", strerror(errno));
1323 }
1324
1325 void
1326 ttysend(char *s, size_t n) {
1327 ttywrite(s, n);
1328 if(IS_SET(MODE_ECHO))
1329 techo(s, n);
1330 }
1331
1332 void
1333 ttyresize(void) {
1334 struct winsize w;
1335
1336 w.ws_row = term.row;
1337 w.ws_col = term.col;
1338 w.ws_xpixel = xw.tw;
1339 w.ws_ypixel = xw.th;
1340 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1341 fprintf(stderr, "Couldn't set window size: %s\n", strerror(errno));
1342 }
1343
1344 int
1345 tattrset(int attr) {
1346 int i, j;
1347
1348 for(i = 0; i < term.row-1; i++) {
1349 for(j = 0; j < term.col-1; j++) {
1350 if(term.line[i][j].mode & attr)
1351 return 1;
1352 }
1353 }
1354
1355 return 0;
1356 }
1357
1358 void
1359 tsetdirt(int top, int bot) {
1360 int i;
1361
1362 LIMIT(top, 0, term.row-1);
1363 LIMIT(bot, 0, term.row-1);
1364
1365 for(i = top; i <= bot; i++)
1366 term.dirty[i] = 1;
1367 }
1368
1369 void
1370 tsetdirtattr(int attr) {
1371 int i, j;
1372
1373 for(i = 0; i < term.row-1; i++) {
1374 for(j = 0; j < term.col-1; j++) {
1375 if(term.line[i][j].mode & attr) {
1376 tsetdirt(i, i);
1377 break;
1378 }
1379 }
1380 }
1381 }
1382
1383 void
1384 tfulldirt(void) {
1385 tsetdirt(0, term.row-1);
1386 }
1387
1388 void
1389 tcursor(int mode) {
1390 static TCursor c[2];
1391 bool alt = IS_SET(MODE_ALTSCREEN);
1392
1393 if(mode == CURSOR_SAVE) {
1394 c[alt] = term.c;
1395 } else if(mode == CURSOR_LOAD) {
1396 term.c = c[alt];
1397 tmoveto(c[alt].x, c[alt].y);
1398 }
1399 }
1400
1401 void
1402 treset(void) {
1403 uint i;
1404
1405 term.c = (TCursor){{
1406 .mode = ATTR_NULL,
1407 .fg = defaultfg,
1408 .bg = defaultbg
1409 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1410
1411 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1412 for(i = tabspaces; i < term.col; i += tabspaces)
1413 term.tabs[i] = 1;
1414 term.top = 0;
1415 term.bot = term.row - 1;
1416 term.mode = MODE_WRAP;
1417 memset(term.trantbl, sizeof(term.trantbl), CS_USA);
1418 term.charset = 0;
1419
1420 for(i = 0; i < 2; i++) {
1421 tmoveto(0, 0);
1422 tcursor(CURSOR_SAVE);
1423 tclearregion(0, 0, term.col-1, term.row-1);
1424 tswapscreen();
1425 }
1426 }
1427
1428 void
1429 tnew(int col, int row) {
1430 term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } };
1431 tresize(col, row);
1432 term.numlock = 1;
1433
1434 treset();
1435 }
1436
1437 void
1438 tswapscreen(void) {
1439 Line *tmp = term.line;
1440
1441 term.line = term.alt;
1442 term.alt = tmp;
1443 term.mode ^= MODE_ALTSCREEN;
1444 tfulldirt();
1445 }
1446
1447 void
1448 tscrolldown(int orig, int n) {
1449 int i;
1450 Line temp;
1451
1452 LIMIT(n, 0, term.bot-orig+1);
1453
1454 tsetdirt(orig, term.bot-n);
1455 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1456
1457 for(i = term.bot; i >= orig+n; i--) {
1458 temp = term.line[i];
1459 term.line[i] = term.line[i-n];
1460 term.line[i-n] = temp;
1461 }
1462
1463 selscroll(orig, n);
1464 }
1465
1466 void
1467 tscrollup(int orig, int n) {
1468 int i;
1469 Line temp;
1470
1471 LIMIT(n, 0, term.bot-orig+1);
1472
1473 tclearregion(0, orig, term.col-1, orig+n-1);
1474 tsetdirt(orig+n, term.bot);
1475
1476 for(i = orig; i <= term.bot-n; i++) {
1477 temp = term.line[i];
1478 term.line[i] = term.line[i+n];
1479 term.line[i+n] = temp;
1480 }
1481
1482 selscroll(orig, -n);
1483 }
1484
1485 void
1486 selscroll(int orig, int n) {
1487 if(sel.ob.x == -1)
1488 return;
1489
1490 if(BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
1491 if((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
1492 selclear(NULL);
1493 return;
1494 }
1495 if(sel.type == SEL_RECTANGULAR) {
1496 if(sel.ob.y < term.top)
1497 sel.ob.y = term.top;
1498 if(sel.oe.y > term.bot)
1499 sel.oe.y = term.bot;
1500 } else {
1501 if(sel.ob.y < term.top) {
1502 sel.ob.y = term.top;
1503 sel.ob.x = 0;
1504 }
1505 if(sel.oe.y > term.bot) {
1506 sel.oe.y = term.bot;
1507 sel.oe.x = term.col;
1508 }
1509 }
1510 selnormalize();
1511 }
1512 }
1513
1514 void
1515 tnewline(int first_col) {
1516 int y = term.c.y;
1517
1518 if(y == term.bot) {
1519 tscrollup(term.top, 1);
1520 } else {
1521 y++;
1522 }
1523 tmoveto(first_col ? 0 : term.c.x, y);
1524 }
1525
1526 void
1527 csiparse(void) {
1528 char *p = csiescseq.buf, *np;
1529 long int v;
1530
1531 csiescseq.narg = 0;
1532 if(*p == '?') {
1533 csiescseq.priv = 1;
1534 p++;
1535 }
1536
1537 csiescseq.buf[csiescseq.len] = '\0';
1538 while(p < csiescseq.buf+csiescseq.len) {
1539 np = NULL;
1540 v = strtol(p, &np, 10);
1541 if(np == p)
1542 v = 0;
1543 if(v == LONG_MAX || v == LONG_MIN)
1544 v = -1;
1545 csiescseq.arg[csiescseq.narg++] = v;
1546 p = np;
1547 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1548 break;
1549 p++;
1550 }
1551 csiescseq.mode[0] = *p++;
1552 csiescseq.mode[1] = (p < csiescseq.buf+csiescseq.len) ? *p : '\0';
1553 }
1554
1555 /* for absolute user moves, when decom is set */
1556 void
1557 tmoveato(int x, int y) {
1558 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1559 }
1560
1561 void
1562 tmoveto(int x, int y) {
1563 int miny, maxy;
1564
1565 if(term.c.state & CURSOR_ORIGIN) {
1566 miny = term.top;
1567 maxy = term.bot;
1568 } else {
1569 miny = 0;
1570 maxy = term.row - 1;
1571 }
1572 LIMIT(x, 0, term.col-1);
1573 LIMIT(y, miny, maxy);
1574 term.c.state &= ~CURSOR_WRAPNEXT;
1575 term.c.x = x;
1576 term.c.y = y;
1577 }
1578
1579 void
1580 tsetchar(char *c, Glyph *attr, int x, int y) {
1581 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1582 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1583 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1584 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1585 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1586 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1587 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1588 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1589 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1590 };
1591
1592 /*
1593 * The table is proudly stolen from rxvt.
1594 */
1595 if(term.trantbl[term.charset] == CS_GRAPHIC0) {
1596 if(BETWEEN(c[0], 0x41, 0x7e) && vt100_0[c[0] - 0x41]) {
1597 c = vt100_0[c[0] - 0x41];
1598 }
1599 }
1600
1601 if(term.line[y][x].mode & ATTR_WIDE) {
1602 if(x+1 < term.col) {
1603 term.line[y][x+1].c[0] = ' ';
1604 term.line[y][x+1].mode &= ~ATTR_WDUMMY;
1605 }
1606 } else if(term.line[y][x].mode & ATTR_WDUMMY) {
1607 term.line[y][x-1].c[0] = ' ';
1608 term.line[y][x-1].mode &= ~ATTR_WIDE;
1609 }
1610
1611 term.dirty[y] = 1;
1612 term.line[y][x] = *attr;
1613 memcpy(term.line[y][x].c, c, UTF_SIZ);
1614 }
1615
1616 void
1617 tclearregion(int x1, int y1, int x2, int y2) {
1618 int x, y, temp;
1619 Glyph *gp;
1620
1621 if(x1 > x2)
1622 temp = x1, x1 = x2, x2 = temp;
1623 if(y1 > y2)
1624 temp = y1, y1 = y2, y2 = temp;
1625
1626 LIMIT(x1, 0, term.col-1);
1627 LIMIT(x2, 0, term.col-1);
1628 LIMIT(y1, 0, term.row-1);
1629 LIMIT(y2, 0, term.row-1);
1630
1631 for(y = y1; y <= y2; y++) {
1632 term.dirty[y] = 1;
1633 for(x = x1; x <= x2; x++) {
1634 gp = &term.line[y][x];
1635 if(selected(x, y))
1636 selclear(NULL);
1637 gp->fg = term.c.attr.fg;
1638 gp->bg = term.c.attr.bg;
1639 gp->mode = 0;
1640 memcpy(gp->c, " ", 2);
1641 }
1642 }
1643 }
1644
1645 void
1646 tdeletechar(int n) {
1647 int dst, src, size;
1648 Glyph *line;
1649
1650 LIMIT(n, 0, term.col - term.c.x);
1651
1652 dst = term.c.x;
1653 src = term.c.x + n;
1654 size = term.col - src;
1655 line = term.line[term.c.y];
1656
1657 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1658 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1659 }
1660
1661 void
1662 tinsertblank(int n) {
1663 int dst, src, size;
1664 Glyph *line;
1665
1666 LIMIT(n, 0, term.col - term.c.x);
1667
1668 dst = term.c.x + n;
1669 src = term.c.x;
1670 size = term.col - dst;
1671 line = term.line[term.c.y];
1672
1673 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1674 tclearregion(src, term.c.y, dst - 1, term.c.y);
1675 }
1676
1677 void
1678 tinsertblankline(int n) {
1679 if(BETWEEN(term.c.y, term.top, term.bot))
1680 tscrolldown(term.c.y, n);
1681 }
1682
1683 void
1684 tdeleteline(int n) {
1685 if(BETWEEN(term.c.y, term.top, term.bot))
1686 tscrollup(term.c.y, n);
1687 }
1688
1689 int32_t
1690 tdefcolor(int *attr, int *npar, int l) {
1691 int32_t idx = -1;
1692 uint r, g, b;
1693
1694 switch (attr[*npar + 1]) {
1695 case 2: /* direct color in RGB space */
1696 if (*npar + 4 >= l) {
1697 fprintf(stderr,
1698 "erresc(38): Incorrect number of parameters (%d)\n",
1699 *npar);
1700 break;
1701 }
1702 r = attr[*npar + 2];
1703 g = attr[*npar + 3];
1704 b = attr[*npar + 4];
1705 *npar += 4;
1706 if(!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
1707 fprintf(stderr, "erresc: bad rgb color (%d,%d,%d)\n",
1708 r, g, b);
1709 else
1710 idx = TRUECOLOR(r, g, b);
1711 break;
1712 case 5: /* indexed color */
1713 if (*npar + 2 >= l) {
1714 fprintf(stderr,
1715 "erresc(38): Incorrect number of parameters (%d)\n",
1716 *npar);
1717 break;
1718 }
1719 *npar += 2;
1720 if(!BETWEEN(attr[*npar], 0, 255))
1721 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
1722 else
1723 idx = attr[*npar];
1724 break;
1725 case 0: /* implemented defined (only foreground) */
1726 case 1: /* transparent */
1727 case 3: /* direct color in CMY space */
1728 case 4: /* direct color in CMYK space */
1729 default:
1730 fprintf(stderr,
1731 "erresc(38): gfx attr %d unknown\n", attr[*npar]);
1732 break;
1733 }
1734
1735 return idx;
1736 }
1737
1738 void
1739 tsetattr(int *attr, int l) {
1740 int i;
1741 int32_t idx;
1742
1743 for(i = 0; i < l; i++) {
1744 switch(attr[i]) {
1745 case 0:
1746 term.c.attr.mode &= ~(
1747 ATTR_BOLD |
1748 ATTR_FAINT |
1749 ATTR_ITALIC |
1750 ATTR_UNDERLINE |
1751 ATTR_BLINK |
1752 ATTR_REVERSE |
1753 ATTR_INVISIBLE |
1754 ATTR_STRUCK );
1755 term.c.attr.fg = defaultfg;
1756 term.c.attr.bg = defaultbg;
1757 break;
1758 case 1:
1759 term.c.attr.mode |= ATTR_BOLD;
1760 break;
1761 case 2:
1762 term.c.attr.mode |= ATTR_FAINT;
1763 break;
1764 case 3:
1765 term.c.attr.mode |= ATTR_ITALIC;
1766 break;
1767 case 4:
1768 term.c.attr.mode |= ATTR_UNDERLINE;
1769 break;
1770 case 5: /* slow blink */
1771 /* FALLTHROUGH */
1772 case 6: /* rapid blink */
1773 term.c.attr.mode |= ATTR_BLINK;
1774 break;
1775 case 7:
1776 term.c.attr.mode |= ATTR_REVERSE;
1777 break;
1778 case 8:
1779 term.c.attr.mode |= ATTR_INVISIBLE;
1780 break;
1781 case 9:
1782 term.c.attr.mode |= ATTR_STRUCK;
1783 break;
1784 case 22:
1785 term.c.attr.mode &= ~(ATTR_BOLD | ATTR_FAINT);
1786 break;
1787 case 23:
1788 term.c.attr.mode &= ~ATTR_ITALIC;
1789 break;
1790 case 24:
1791 term.c.attr.mode &= ~ATTR_UNDERLINE;
1792 break;
1793 case 25:
1794 term.c.attr.mode &= ~ATTR_BLINK;
1795 break;
1796 case 27:
1797 term.c.attr.mode &= ~ATTR_REVERSE;
1798 break;
1799 case 28:
1800 term.c.attr.mode &= ~ATTR_INVISIBLE;
1801 break;
1802 case 29:
1803 term.c.attr.mode &= ~ATTR_STRUCK;
1804 break;
1805 case 38:
1806 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1807 term.c.attr.fg = idx;
1808 break;
1809 case 39:
1810 term.c.attr.fg = defaultfg;
1811 break;
1812 case 48:
1813 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1814 term.c.attr.bg = idx;
1815 break;
1816 case 49:
1817 term.c.attr.bg = defaultbg;
1818 break;
1819 default:
1820 if(BETWEEN(attr[i], 30, 37)) {
1821 term.c.attr.fg = attr[i] - 30;
1822 } else if(BETWEEN(attr[i], 40, 47)) {
1823 term.c.attr.bg = attr[i] - 40;
1824 } else if(BETWEEN(attr[i], 90, 97)) {
1825 term.c.attr.fg = attr[i] - 90 + 8;
1826 } else if(BETWEEN(attr[i], 100, 107)) {
1827 term.c.attr.bg = attr[i] - 100 + 8;
1828 } else {
1829 fprintf(stderr,
1830 "erresc(default): gfx attr %d unknown\n",
1831 attr[i]), csidump();
1832 }
1833 break;
1834 }
1835 }
1836 }
1837
1838 void
1839 tsetscroll(int t, int b) {
1840 int temp;
1841
1842 LIMIT(t, 0, term.row-1);
1843 LIMIT(b, 0, term.row-1);
1844 if(t > b) {
1845 temp = t;
1846 t = b;
1847 b = temp;
1848 }
1849 term.top = t;
1850 term.bot = b;
1851 }
1852
1853 void
1854 tsetmode(bool priv, bool set, int *args, int narg) {
1855 int *lim, mode;
1856 bool alt;
1857
1858 for(lim = args + narg; args < lim; ++args) {
1859 if(priv) {
1860 switch(*args) {
1861 case 1: /* DECCKM -- Cursor key */
1862 MODBIT(term.mode, set, MODE_APPCURSOR);
1863 break;
1864 case 5: /* DECSCNM -- Reverse video */
1865 mode = term.mode;
1866 MODBIT(term.mode, set, MODE_REVERSE);
1867 if(mode != term.mode)
1868 redraw();
1869 break;
1870 case 6: /* DECOM -- Origin */
1871 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1872 tmoveato(0, 0);
1873 break;
1874 case 7: /* DECAWM -- Auto wrap */
1875 MODBIT(term.mode, set, MODE_WRAP);
1876 break;
1877 case 0: /* Error (IGNORED) */
1878 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1879 case 3: /* DECCOLM -- Column (IGNORED) */
1880 case 4: /* DECSCLM -- Scroll (IGNORED) */
1881 case 8: /* DECARM -- Auto repeat (IGNORED) */
1882 case 18: /* DECPFF -- Printer feed (IGNORED) */
1883 case 19: /* DECPEX -- Printer extent (IGNORED) */
1884 case 42: /* DECNRCM -- National characters (IGNORED) */
1885 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1886 break;
1887 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1888 MODBIT(term.mode, !set, MODE_HIDE);
1889 break;
1890 case 9: /* X10 mouse compatibility mode */
1891 xsetpointermotion(0);
1892 MODBIT(term.mode, 0, MODE_MOUSE);
1893 MODBIT(term.mode, set, MODE_MOUSEX10);
1894 break;
1895 case 1000: /* 1000: report button press */
1896 xsetpointermotion(0);
1897 MODBIT(term.mode, 0, MODE_MOUSE);
1898 MODBIT(term.mode, set, MODE_MOUSEBTN);
1899 break;
1900 case 1002: /* 1002: report motion on button press */
1901 xsetpointermotion(0);
1902 MODBIT(term.mode, 0, MODE_MOUSE);
1903 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1904 break;
1905 case 1003: /* 1003: enable all mouse motions */
1906 xsetpointermotion(set);
1907 MODBIT(term.mode, 0, MODE_MOUSE);
1908 MODBIT(term.mode, set, MODE_MOUSEMANY);
1909 break;
1910 case 1004: /* 1004: send focus events to tty */
1911 MODBIT(term.mode, set, MODE_FOCUS);
1912 break;
1913 case 1006: /* 1006: extended reporting mode */
1914 MODBIT(term.mode, set, MODE_MOUSESGR);
1915 break;
1916 case 1034:
1917 MODBIT(term.mode, set, MODE_8BIT);
1918 break;
1919 case 1049: /* swap screen & set/restore cursor as xterm */
1920 if (!allowaltscreen)
1921 break;
1922 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1923 /* FALLTHROUGH */
1924 case 47: /* swap screen */
1925 case 1047:
1926 if (!allowaltscreen)
1927 break;
1928 alt = IS_SET(MODE_ALTSCREEN);
1929 if(alt) {
1930 tclearregion(0, 0, term.col-1,
1931 term.row-1);
1932 }
1933 if(set ^ alt) /* set is always 1 or 0 */
1934 tswapscreen();
1935 if(*args != 1049)
1936 break;
1937 /* FALLTHROUGH */
1938 case 1048:
1939 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1940 break;
1941 case 2004: /* 2004: bracketed paste mode */
1942 MODBIT(term.mode, set, MODE_BRCKTPASTE);
1943 break;
1944 /* Not implemented mouse modes. See comments there. */
1945 case 1001: /* mouse highlight mode; can hang the
1946 terminal by design when implemented. */
1947 case 1005: /* UTF-8 mouse mode; will confuse
1948 applications not supporting UTF-8
1949 and luit. */
1950 case 1015: /* urxvt mangled mouse mode; incompatible
1951 and can be mistaken for other control
1952 codes. */
1953 default:
1954 fprintf(stderr,
1955 "erresc: unknown private set/reset mode %d\n",
1956 *args);
1957 break;
1958 }
1959 } else {
1960 switch(*args) {
1961 case 0: /* Error (IGNORED) */
1962 break;
1963 case 2: /* KAM -- keyboard action */
1964 MODBIT(term.mode, set, MODE_KBDLOCK);
1965 break;
1966 case 4: /* IRM -- Insertion-replacement */
1967 MODBIT(term.mode, set, MODE_INSERT);
1968 break;
1969 case 12: /* SRM -- Send/Receive */
1970 MODBIT(term.mode, !set, MODE_ECHO);
1971 break;
1972 case 20: /* LNM -- Linefeed/new line */
1973 MODBIT(term.mode, set, MODE_CRLF);
1974 break;
1975 default:
1976 fprintf(stderr,
1977 "erresc: unknown set/reset mode %d\n",
1978 *args);
1979 break;
1980 }
1981 }
1982 }
1983 }
1984
1985 void
1986 csihandle(void) {
1987 char buf[40];
1988 int len;
1989
1990 switch(csiescseq.mode[0]) {
1991 default:
1992 unknown:
1993 fprintf(stderr, "erresc: unknown csi ");
1994 csidump();
1995 /* die(""); */
1996 break;
1997 case '@': /* ICH -- Insert <n> blank char */
1998 DEFAULT(csiescseq.arg[0], 1);
1999 tinsertblank(csiescseq.arg[0]);
2000 break;
2001 case 'A': /* CUU -- Cursor <n> Up */
2002 DEFAULT(csiescseq.arg[0], 1);
2003 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
2004 break;
2005 case 'B': /* CUD -- Cursor <n> Down */
2006 case 'e': /* VPR --Cursor <n> Down */
2007 DEFAULT(csiescseq.arg[0], 1);
2008 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
2009 break;
2010 case 'i': /* MC -- Media Copy */
2011 switch(csiescseq.arg[0]) {
2012 case 0:
2013 tdump();
2014 break;
2015 case 1:
2016 tdumpline(term.c.y);
2017 break;
2018 case 2:
2019 tdumpsel();
2020 break;
2021 case 4:
2022 term.mode &= ~MODE_PRINT;
2023 break;
2024 case 5:
2025 term.mode |= MODE_PRINT;
2026 break;
2027 }
2028 break;
2029 case 'c': /* DA -- Device Attributes */
2030 if(csiescseq.arg[0] == 0)
2031 ttywrite(vtiden, sizeof(vtiden) - 1);
2032 break;
2033 case 'C': /* CUF -- Cursor <n> Forward */
2034 case 'a': /* HPR -- Cursor <n> Forward */
2035 DEFAULT(csiescseq.arg[0], 1);
2036 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
2037 break;
2038 case 'D': /* CUB -- Cursor <n> Backward */
2039 DEFAULT(csiescseq.arg[0], 1);
2040 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
2041 break;
2042 case 'E': /* CNL -- Cursor <n> Down and first col */
2043 DEFAULT(csiescseq.arg[0], 1);
2044 tmoveto(0, term.c.y+csiescseq.arg[0]);
2045 break;
2046 case 'F': /* CPL -- Cursor <n> Up and first col */
2047 DEFAULT(csiescseq.arg[0], 1);
2048 tmoveto(0, term.c.y-csiescseq.arg[0]);
2049 break;
2050 case 'g': /* TBC -- Tabulation clear */
2051 switch(csiescseq.arg[0]) {
2052 case 0: /* clear current tab stop */
2053 term.tabs[term.c.x] = 0;
2054 break;
2055 case 3: /* clear all the tabs */
2056 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
2057 break;
2058 default:
2059 goto unknown;
2060 }
2061 break;
2062 case 'G': /* CHA -- Move to <col> */
2063 case '`': /* HPA */
2064 DEFAULT(csiescseq.arg[0], 1);
2065 tmoveto(csiescseq.arg[0]-1, term.c.y);
2066 break;
2067 case 'H': /* CUP -- Move to <row> <col> */
2068 case 'f': /* HVP */
2069 DEFAULT(csiescseq.arg[0], 1);
2070 DEFAULT(csiescseq.arg[1], 1);
2071 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
2072 break;
2073 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
2074 DEFAULT(csiescseq.arg[0], 1);
2075 tputtab(csiescseq.arg[0]);
2076 break;
2077 case 'J': /* ED -- Clear screen */
2078 selclear(NULL);
2079 switch(csiescseq.arg[0]) {
2080 case 0: /* below */
2081 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
2082 if(term.c.y < term.row-1) {
2083 tclearregion(0, term.c.y+1, term.col-1,
2084 term.row-1);
2085 }
2086 break;
2087 case 1: /* above */
2088 if(term.c.y > 1)
2089 tclearregion(0, 0, term.col-1, term.c.y-1);
2090 tclearregion(0, term.c.y, term.c.x, term.c.y);
2091 break;
2092 case 2: /* all */
2093 tclearregion(0, 0, term.col-1, term.row-1);
2094 break;
2095 default:
2096 goto unknown;
2097 }
2098 break;
2099 case 'K': /* EL -- Clear line */
2100 switch(csiescseq.arg[0]) {
2101 case 0: /* right */
2102 tclearregion(term.c.x, term.c.y, term.col-1,
2103 term.c.y);
2104 break;
2105 case 1: /* left */
2106 tclearregion(0, term.c.y, term.c.x, term.c.y);
2107 break;
2108 case 2: /* all */
2109 tclearregion(0, term.c.y, term.col-1, term.c.y);
2110 break;
2111 }
2112 break;
2113 case 'S': /* SU -- Scroll <n> line up */
2114 DEFAULT(csiescseq.arg[0], 1);
2115 tscrollup(term.top, csiescseq.arg[0]);
2116 break;
2117 case 'T': /* SD -- Scroll <n> line down */
2118 DEFAULT(csiescseq.arg[0], 1);
2119 tscrolldown(term.top, csiescseq.arg[0]);
2120 break;
2121 case 'L': /* IL -- Insert <n> blank lines */
2122 DEFAULT(csiescseq.arg[0], 1);
2123 tinsertblankline(csiescseq.arg[0]);
2124 break;
2125 case 'l': /* RM -- Reset Mode */
2126 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
2127 break;
2128 case 'M': /* DL -- Delete <n> lines */
2129 DEFAULT(csiescseq.arg[0], 1);
2130 tdeleteline(csiescseq.arg[0]);
2131 break;
2132 case 'X': /* ECH -- Erase <n> char */
2133 DEFAULT(csiescseq.arg[0], 1);
2134 tclearregion(term.c.x, term.c.y,
2135 term.c.x + csiescseq.arg[0] - 1, term.c.y);
2136 break;
2137 case 'P': /* DCH -- Delete <n> char */
2138 DEFAULT(csiescseq.arg[0], 1);
2139 tdeletechar(csiescseq.arg[0]);
2140 break;
2141 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
2142 DEFAULT(csiescseq.arg[0], 1);
2143 tputtab(-csiescseq.arg[0]);
2144 break;
2145 case 'd': /* VPA -- Move to <row> */
2146 DEFAULT(csiescseq.arg[0], 1);
2147 tmoveato(term.c.x, csiescseq.arg[0]-1);
2148 break;
2149 case 'h': /* SM -- Set terminal mode */
2150 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
2151 break;
2152 case 'm': /* SGR -- Terminal attribute (color) */
2153 tsetattr(csiescseq.arg, csiescseq.narg);
2154 break;
2155 case 'n': /* DSR – Device Status Report (cursor position) */
2156 if (csiescseq.arg[0] == 6) {
2157 len = snprintf(buf, sizeof(buf),"\033[%i;%iR",
2158 term.c.y+1, term.c.x+1);
2159 ttywrite(buf, len);
2160 }
2161 break;
2162 case 'r': /* DECSTBM -- Set Scrolling Region */
2163 if(csiescseq.priv) {
2164 goto unknown;
2165 } else {
2166 DEFAULT(csiescseq.arg[0], 1);
2167 DEFAULT(csiescseq.arg[1], term.row);
2168 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
2169 tmoveato(0, 0);
2170 }
2171 break;
2172 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
2173 tcursor(CURSOR_SAVE);
2174 break;
2175 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
2176 tcursor(CURSOR_LOAD);
2177 break;
2178 case ' ':
2179 switch (csiescseq.mode[1]) {
2180 case 'q': /* DECSCUSR -- Set Cursor Style */
2181 DEFAULT(csiescseq.arg[0], 1);
2182 if (!BETWEEN(csiescseq.arg[0], 0, 6)) {
2183 goto unknown;
2184 }
2185 xw.cursor = csiescseq.arg[0];
2186 break;
2187 default:
2188 goto unknown;
2189 }
2190 break;
2191 }
2192 }
2193
2194 void
2195 csidump(void) {
2196 int i;
2197 uint c;
2198
2199 printf("ESC[");
2200 for(i = 0; i < csiescseq.len; i++) {
2201 c = csiescseq.buf[i] & 0xff;
2202 if(isprint(c)) {
2203 putchar(c);
2204 } else if(c == '\n') {
2205 printf("(\\n)");
2206 } else if(c == '\r') {
2207 printf("(\\r)");
2208 } else if(c == 0x1b) {
2209 printf("(\\e)");
2210 } else {
2211 printf("(%02x)", c);
2212 }
2213 }
2214 putchar('\n');
2215 }
2216
2217 void
2218 csireset(void) {
2219 memset(&csiescseq, 0, sizeof(csiescseq));
2220 }
2221
2222 void
2223 strhandle(void) {
2224 char *p = NULL;
2225 int j, narg, par;
2226
2227 term.esc &= ~(ESC_STR_END|ESC_STR);
2228 strparse();
2229 narg = strescseq.narg;
2230 par = atoi(strescseq.args[0]);
2231
2232 switch(strescseq.type) {
2233 case ']': /* OSC -- Operating System Command */
2234 switch(par) {
2235 case 0:
2236 case 1:
2237 case 2:
2238 if(narg > 1)
2239 xsettitle(strescseq.args[1]);
2240 return;
2241 case 4: /* color set */
2242 if(narg < 3)
2243 break;
2244 p = strescseq.args[2];
2245 /* FALLTHROUGH */
2246 case 104: /* color reset, here p = NULL */
2247 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2248 if(xsetcolorname(j, p)) {
2249 fprintf(stderr, "erresc: invalid color %s\n", p);
2250 } else {
2251 /*
2252 * TODO if defaultbg color is changed, borders
2253 * are dirty
2254 */
2255 redraw();
2256 }
2257 return;
2258 }
2259 break;
2260 case 'k': /* old title set compatibility */
2261 xsettitle(strescseq.args[0]);
2262 return;
2263 case 'P': /* DCS -- Device Control String */
2264 case '_': /* APC -- Application Program Command */
2265 case '^': /* PM -- Privacy Message */
2266 return;
2267 }
2268
2269 fprintf(stderr, "erresc: unknown str ");
2270 strdump();
2271 }
2272
2273 void
2274 strparse(void) {
2275 char *p = strescseq.buf;
2276
2277 strescseq.narg = 0;
2278 strescseq.buf[strescseq.len] = '\0';
2279 while(p && strescseq.narg < STR_ARG_SIZ)
2280 strescseq.args[strescseq.narg++] = strsep(&p, ";");
2281 }
2282
2283 void
2284 strdump(void) {
2285 int i;
2286 uint c;
2287
2288 printf("ESC%c", strescseq.type);
2289 for(i = 0; i < strescseq.len; i++) {
2290 c = strescseq.buf[i] & 0xff;
2291 if(c == '\0') {
2292 return;
2293 } else if(isprint(c)) {
2294 putchar(c);
2295 } else if(c == '\n') {
2296 printf("(\\n)");
2297 } else if(c == '\r') {
2298 printf("(\\r)");
2299 } else if(c == 0x1b) {
2300 printf("(\\e)");
2301 } else {
2302 printf("(%02x)", c);
2303 }
2304 }
2305 printf("ESC\\\n");
2306 }
2307
2308 void
2309 strreset(void) {
2310 memset(&strescseq, 0, sizeof(strescseq));
2311 }
2312
2313 void
2314 tprinter(char *s, size_t len) {
2315 if(iofd != -1 && xwrite(iofd, s, len) < 0) {
2316 fprintf(stderr, "Error writing in %s:%s\n",
2317 opt_io, strerror(errno));
2318 close(iofd);
2319 iofd = -1;
2320 }
2321 }
2322
2323 void
2324 toggleprinter(const Arg *arg) {
2325 term.mode ^= MODE_PRINT;
2326 }
2327
2328 void
2329 printscreen(const Arg *arg) {
2330 tdump();
2331 }
2332
2333 void
2334 printsel(const Arg *arg) {
2335 tdumpsel();
2336 }
2337
2338 void
2339 tdumpsel(void) {
2340 char *ptr;
2341
2342 if((ptr = getsel())) {
2343 tprinter(ptr, strlen(ptr));
2344 free(ptr);
2345 }
2346 }
2347
2348 void
2349 tdumpline(int n) {
2350 Glyph *bp, *end;
2351
2352 bp = &term.line[n][0];
2353 end = &bp[MIN(tlinelen(n), term.col) - 1];
2354 if(bp != end || bp->c[0] != ' ') {
2355 for( ;bp <= end; ++bp)
2356 tprinter(bp->c, utf8len(bp->c));
2357 }
2358 tprinter("\n", 1);
2359 }
2360
2361 void
2362 tdump(void) {
2363 int i;
2364
2365 for(i = 0; i < term.row; ++i)
2366 tdumpline(i);
2367 }
2368
2369 void
2370 tputtab(int n) {
2371 uint x = term.c.x;
2372
2373 if(n > 0) {
2374 while(x < term.col && n--)
2375 for(++x; x < term.col && !term.tabs[x]; ++x)
2376 /* nothing */ ;
2377 } else if(n < 0) {
2378 while(x > 0 && n++)
2379 for(--x; x > 0 && !term.tabs[x]; --x)
2380 /* nothing */ ;
2381 }
2382 tmoveto(x, term.c.y);
2383 }
2384
2385 void
2386 techo(char *buf, int len) {
2387 for(; len > 0; buf++, len--) {
2388 char c = *buf;
2389
2390 if(ISCONTROL((uchar) c)) { /* control code */
2391 if(c & 0x80) {
2392 c &= 0x7f;
2393 tputc("^", 1);
2394 tputc("[", 1);
2395 } else if(c != '\n' && c != '\r' && c != '\t') {
2396 c ^= 0x40;
2397 tputc("^", 1);
2398 }
2399 tputc(&c, 1);
2400 } else {
2401 break;
2402 }
2403 }
2404 if(len)
2405 tputc(buf, len);
2406 }
2407
2408 void
2409 tdeftran(char ascii) {
2410 static char cs[] = "0B";
2411 static int vcs[] = {CS_GRAPHIC0, CS_USA};
2412 char *p;
2413
2414 if((p = strchr(cs, ascii)) == NULL) {
2415 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2416 } else {
2417 term.trantbl[term.icharset] = vcs[p - cs];
2418 }
2419 }
2420
2421 void
2422 tdectest(char c) {
2423 static char E[UTF_SIZ] = "E";
2424 int x, y;
2425
2426 if(c == '8') { /* DEC screen alignment test. */
2427 for(x = 0; x < term.col; ++x) {
2428 for(y = 0; y < term.row; ++y)
2429 tsetchar(E, &term.c.attr, x, y);
2430 }
2431 }
2432 }
2433
2434 void
2435 tstrsequence(uchar c) {
2436 if (c & 0x80) {
2437 switch (c) {
2438 case 0x90: /* DCS -- Device Control String */
2439 c = 'P';
2440 break;
2441 case 0x9f: /* APC -- Application Program Command */
2442 c = '_';
2443 break;
2444 case 0x9e: /* PM -- Privacy Message */
2445 c = '^';
2446 break;
2447 case 0x9d: /* OSC -- Operating System Command */
2448 c = ']';
2449 break;
2450 }
2451 }
2452 strreset();
2453 strescseq.type = c;
2454 term.esc |= ESC_STR;
2455 return;
2456 }
2457
2458 void
2459 tcontrolcode(uchar ascii) {
2460 static char question[UTF_SIZ] = "?";
2461
2462 switch(ascii) {
2463 case '\t': /* HT */
2464 tputtab(1);
2465 return;
2466 case '\b': /* BS */
2467 tmoveto(term.c.x-1, term.c.y);
2468 return;
2469 case '\r': /* CR */
2470 tmoveto(0, term.c.y);
2471 return;
2472 case '\f': /* LF */
2473 case '\v': /* VT */
2474 case '\n': /* LF */
2475 /* go to first col if the mode is set */
2476 tnewline(IS_SET(MODE_CRLF));
2477 return;
2478 case '\a': /* BEL */
2479 if(term.esc & ESC_STR_END) {
2480 /* backwards compatibility to xterm */
2481 strhandle();
2482 } else {
2483 if(!(xw.state & WIN_FOCUSED))
2484 xseturgency(1);
2485 if (bellvolume)
2486 XkbBell(xw.dpy, xw.win, bellvolume, (Atom)NULL);
2487 }
2488 break;
2489 case '\033': /* ESC */
2490 csireset();
2491 term.esc &= ~(ESC_CSI|ESC_ALTCHARSET|ESC_TEST);
2492 term.esc |= ESC_START;
2493 return;
2494 case '\016': /* SO (LS1 -- Locking shift 1) */
2495 case '\017': /* SI (LS0 -- Locking shift 0) */
2496 term.charset = 1 - (ascii - '\016');
2497 return;
2498 case '\032': /* SUB */
2499 tsetchar(question, &term.c.attr, term.c.x, term.c.y);
2500 case '\030': /* CAN */
2501 csireset();
2502 break;
2503 case '\005': /* ENQ (IGNORED) */
2504 case '\000': /* NUL (IGNORED) */
2505 case '\021': /* XON (IGNORED) */
2506 case '\023': /* XOFF (IGNORED) */
2507 case 0177: /* DEL (IGNORED) */
2508 return;
2509 case 0x84: /* TODO: IND */
2510 break;
2511 case 0x85: /* NEL -- Next line */
2512 tnewline(1); /* always go to first col */
2513 break;
2514 case 0x88: /* HTS -- Horizontal tab stop */
2515 term.tabs[term.c.x] = 1;
2516 break;
2517 case 0x8d: /* TODO: RI */
2518 case 0x8e: /* TODO: SS2 */
2519 case 0x8f: /* TODO: SS3 */
2520 case 0x98: /* TODO: SOS */
2521 break;
2522 case 0x9a: /* DECID -- Identify Terminal */
2523 ttywrite(vtiden, sizeof(vtiden) - 1);
2524 break;
2525 case 0x9b: /* TODO: CSI */
2526 case 0x9c: /* TODO: ST */
2527 break;
2528 case 0x90: /* DCS -- Device Control String */
2529 case 0x9f: /* APC -- Application Program Command */
2530 case 0x9e: /* PM -- Privacy Message */
2531 case 0x9d: /* OSC -- Operating System Command */
2532 tstrsequence(ascii);
2533 return;
2534 }
2535 /* only CAN, SUB, \a and C1 chars interrupt a sequence */
2536 term.esc &= ~(ESC_STR_END|ESC_STR);
2537 return;
2538 }
2539
2540 /*
2541 * returns 1 when the sequence is finished and it hasn't to read
2542 * more characters for this sequence, otherwise 0
2543 */
2544 int
2545 eschandle(uchar ascii) {
2546 switch(ascii) {
2547 case '[':
2548 term.esc |= ESC_CSI;
2549 return 0;
2550 case '#':
2551 term.esc |= ESC_TEST;
2552 return 0;
2553 case 'P': /* DCS -- Device Control String */
2554 case '_': /* APC -- Application Program Command */
2555 case '^': /* PM -- Privacy Message */
2556 case ']': /* OSC -- Operating System Command */
2557 case 'k': /* old title set compatibility */
2558 tstrsequence(ascii);
2559 return 0;
2560 case 'n': /* LS2 -- Locking shift 2 */
2561 case 'o': /* LS3 -- Locking shift 3 */
2562 term.charset = 2 + (ascii - 'n');
2563 break;
2564 case '(': /* GZD4 -- set primary charset G0 */
2565 case ')': /* G1D4 -- set secondary charset G1 */
2566 case '*': /* G2D4 -- set tertiary charset G2 */
2567 case '+': /* G3D4 -- set quaternary charset G3 */
2568 term.icharset = ascii - '(';
2569 term.esc |= ESC_ALTCHARSET;
2570 return 0;
2571 case 'D': /* IND -- Linefeed */
2572 if(term.c.y == term.bot) {
2573 tscrollup(term.top, 1);
2574 } else {
2575 tmoveto(term.c.x, term.c.y+1);
2576 }
2577 break;
2578 case 'E': /* NEL -- Next line */
2579 tnewline(1); /* always go to first col */
2580 break;
2581 case 'H': /* HTS -- Horizontal tab stop */
2582 term.tabs[term.c.x] = 1;
2583 break;
2584 case 'M': /* RI -- Reverse index */
2585 if(term.c.y == term.top) {
2586 tscrolldown(term.top, 1);
2587 } else {
2588 tmoveto(term.c.x, term.c.y-1);
2589 }
2590 break;
2591 case 'Z': /* DECID -- Identify Terminal */
2592 ttywrite(vtiden, sizeof(vtiden) - 1);
2593 break;
2594 case 'c': /* RIS -- Reset to inital state */
2595 treset();
2596 xresettitle();
2597 xloadcols();
2598 break;
2599 case '=': /* DECPAM -- Application keypad */
2600 term.mode |= MODE_APPKEYPAD;
2601 break;
2602 case '>': /* DECPNM -- Normal keypad */
2603 term.mode &= ~MODE_APPKEYPAD;
2604 break;
2605 case '7': /* DECSC -- Save Cursor */
2606 tcursor(CURSOR_SAVE);
2607 break;
2608 case '8': /* DECRC -- Restore Cursor */
2609 tcursor(CURSOR_LOAD);
2610 break;
2611 case '\\': /* ST -- String Terminator */
2612 if(term.esc & ESC_STR_END)
2613 strhandle();
2614 break;
2615 default:
2616 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2617 (uchar) ascii, isprint(ascii)? ascii:'.');
2618 break;
2619 }
2620 return 1;
2621 }
2622
2623 void
2624 tputc(char *c, int len) {
2625 uchar ascii;
2626 bool control;
2627 long unicodep;
2628 int width;
2629 Glyph *gp;
2630
2631 if(len == 1) {
2632 width = 1;
2633 unicodep = ascii = *c;
2634 } else {
2635 utf8decode(c, &unicodep, UTF_SIZ);
2636 if ((width = wcwidth(unicodep)) == -1) {
2637 c = "\357\277\275"; /* UTF_INVALID */
2638 width = 1;
2639 }
2640 control = ISCONTROLC1(unicodep);
2641 ascii = unicodep;
2642 }
2643
2644 if(IS_SET(MODE_PRINT))
2645 tprinter(c, len);
2646 control = ISCONTROL(unicodep);
2647
2648 /*
2649 * STR sequence must be checked before anything else
2650 * because it uses all following characters until it
2651 * receives a ESC, a SUB, a ST or any other C1 control
2652 * character.
2653 */
2654 if(term.esc & ESC_STR) {
2655 if(width == 1 &&
2656 (ascii == '\a' || ascii == 030 ||
2657 ascii == 032 || ascii == 033 ||
2658 ISCONTROLC1(unicodep))) {
2659 term.esc &= ~(ESC_START|ESC_STR);
2660 term.esc |= ESC_STR_END;
2661 } else if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2662 memmove(&strescseq.buf[strescseq.len], c, len);
2663 strescseq.len += len;
2664 return;
2665 } else {
2666 /*
2667 * Here is a bug in terminals. If the user never sends
2668 * some code to stop the str or esc command, then st
2669 * will stop responding. But this is better than
2670 * silently failing with unknown characters. At least
2671 * then users will report back.
2672 *
2673 * In the case users ever get fixed, here is the code:
2674 */
2675 /*
2676 * term.esc = 0;
2677 * strhandle();
2678 */
2679 return;
2680 }
2681 }
2682
2683 /*
2684 * Actions of control codes must be performed as soon they arrive
2685 * because they can be embedded inside a control sequence, and
2686 * they must not cause conflicts with sequences.
2687 */
2688 if(control) {
2689 tcontrolcode(ascii);
2690 /*
2691 * control codes are not shown ever
2692 */
2693 return;
2694 } else if(term.esc & ESC_START) {
2695 if(term.esc & ESC_CSI) {
2696 csiescseq.buf[csiescseq.len++] = ascii;
2697 if(BETWEEN(ascii, 0x40, 0x7E)
2698 || csiescseq.len >= \
2699 sizeof(csiescseq.buf)-1) {
2700 term.esc = 0;
2701 csiparse();
2702 csihandle();
2703 }
2704 return;
2705 } else if(term.esc & ESC_ALTCHARSET) {
2706 tdeftran(ascii);
2707 } else if(term.esc & ESC_TEST) {
2708 tdectest(ascii);
2709 } else {
2710 if (!eschandle(ascii))
2711 return;
2712 /* sequence already finished */
2713 }
2714 term.esc = 0;
2715 /*
2716 * All characters which form part of a sequence are not
2717 * printed
2718 */
2719 return;
2720 }
2721 if(sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
2722 selclear(NULL);
2723
2724 gp = &term.line[term.c.y][term.c.x];
2725 if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2726 gp->mode |= ATTR_WRAP;
2727 tnewline(1);
2728 gp = &term.line[term.c.y][term.c.x];
2729 }
2730
2731 if(IS_SET(MODE_INSERT) && term.c.x+width < term.col)
2732 memmove(gp+width, gp, (term.col - term.c.x - width) * sizeof(Glyph));
2733
2734 if(term.c.x+width > term.col) {
2735 tnewline(1);
2736 gp = &term.line[term.c.y][term.c.x];
2737 }
2738
2739 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2740
2741 if(width == 2) {
2742 gp->mode |= ATTR_WIDE;
2743 if(term.c.x+1 < term.col) {
2744 gp[1].c[0] = '\0';
2745 gp[1].mode = ATTR_WDUMMY;
2746 }
2747 }
2748 if(term.c.x+width < term.col) {
2749 tmoveto(term.c.x+width, term.c.y);
2750 } else {
2751 term.c.state |= CURSOR_WRAPNEXT;
2752 }
2753 }
2754
2755 void
2756 tresize(int col, int row) {
2757 int i;
2758 int minrow = MIN(row, term.row);
2759 int mincol = MIN(col, term.col);
2760 int slide = term.c.y - row + 1;
2761 bool *bp;
2762 TCursor c;
2763
2764 if(col < 1 || row < 1) {
2765 fprintf(stderr,
2766 "tresize: error resizing to %dx%d\n", col, row);
2767 return;
2768 }
2769
2770 /* free unneeded rows */
2771 i = 0;
2772 if(slide > 0) {
2773 /*
2774 * slide screen to keep cursor where we expect it -
2775 * tscrollup would work here, but we can optimize to
2776 * memmove because we're freeing the earlier lines
2777 */
2778 for(/* i = 0 */; i < slide; i++) {
2779 free(term.line[i]);
2780 free(term.alt[i]);
2781 }
2782 memmove(term.line, term.line + slide, row * sizeof(Line));
2783 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2784 }
2785 for(i += row; i < term.row; i++) {
2786 free(term.line[i]);
2787 free(term.alt[i]);
2788 }
2789
2790 /* resize to new height */
2791 term.line = xrealloc(term.line, row * sizeof(Line));
2792 term.alt = xrealloc(term.alt, row * sizeof(Line));
2793 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2794 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2795
2796 /* resize each row to new width, zero-pad if needed */
2797 for(i = 0; i < minrow; i++) {
2798 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2799 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2800 }
2801
2802 /* allocate any new rows */
2803 for(/* i == minrow */; i < row; i++) {
2804 term.line[i] = xmalloc(col * sizeof(Glyph));
2805 term.alt[i] = xmalloc(col * sizeof(Glyph));
2806 }
2807 if(col > term.col) {
2808 bp = term.tabs + term.col;
2809
2810 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2811 while(--bp > term.tabs && !*bp)
2812 /* nothing */ ;
2813 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2814 *bp = 1;
2815 }
2816 /* update terminal size */
2817 term.col = col;
2818 term.row = row;
2819 /* reset scrolling region */
2820 tsetscroll(0, row-1);
2821 /* make use of the LIMIT in tmoveto */
2822 tmoveto(term.c.x, term.c.y);
2823 /* Clearing both screens (it makes dirty all lines) */
2824 c = term.c;
2825 for(i = 0; i < 2; i++) {
2826 if(mincol < col && 0 < minrow) {
2827 tclearregion(mincol, 0, col - 1, minrow - 1);
2828 }
2829 if(0 < col && minrow < row) {
2830 tclearregion(0, minrow, col - 1, row - 1);
2831 }
2832 tswapscreen();
2833 tcursor(CURSOR_LOAD);
2834 }
2835 term.c = c;
2836 }
2837
2838 void
2839 xresize(int col, int row) {
2840 xw.tw = MAX(1, col * xw.cw);
2841 xw.th = MAX(1, row * xw.ch);
2842
2843 XFreePixmap(xw.dpy, xw.buf);
2844 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2845 DefaultDepth(xw.dpy, xw.scr));
2846 XftDrawChange(xw.draw, xw.buf);
2847 xclear(0, 0, xw.w, xw.h);
2848 }
2849
2850 static inline ushort
2851 sixd_to_16bit(int x) {
2852 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2853 }
2854
2855 void
2856 xloadcols(void) {
2857 int i;
2858 XRenderColor color = { .alpha = 0xffff };
2859 static bool loaded;
2860 Color *cp;
2861
2862 if(loaded) {
2863 for (cp = dc.col; cp < dc.col + LEN(dc.col); ++cp)
2864 XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
2865 }
2866
2867 /* load colors [0-15] and [256-LEN(colorname)] (config.h) */
2868 for(i = 0; i < LEN(colorname); i++) {
2869 if(!colorname[i])
2870 continue;
2871 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2872 die("Could not allocate color '%s'\n", colorname[i]);
2873 }
2874 }
2875
2876 /* load colors [16-231] ; same colors as xterm */
2877 for(i = 16; i < 6*6*6+16; i++) {
2878 color.red = sixd_to_16bit( ((i-16)/36)%6 );
2879 color.green = sixd_to_16bit( ((i-16)/6) %6 );
2880 color.blue = sixd_to_16bit( ((i-16)/1) %6 );
2881 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i]))
2882 die("Could not allocate color %d\n", i);
2883 }
2884
2885 /* load colors [232-255] ; grayscale */
2886 for(; i < 256; i++) {
2887 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (i-(6*6*6+16));
2888 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i]))
2889 die("Could not allocate color %d\n", i);
2890 }
2891 loaded = true;
2892 }
2893
2894 int
2895 xsetcolorname(int x, const char *name) {
2896 XRenderColor color = { .alpha = 0xffff };
2897 Color ncolor;
2898
2899 if(!BETWEEN(x, 0, LEN(colorname)))
2900 return 1;
2901
2902 if(!name) {
2903 if(BETWEEN(x, 16, 16 + 215)) { /* 256 color */
2904 color.red = sixd_to_16bit( ((x-16)/36)%6 );
2905 color.green = sixd_to_16bit( ((x-16)/6) %6 );
2906 color.blue = sixd_to_16bit( ((x-16)/1) %6 );
2907 if(!XftColorAllocValue(xw.dpy, xw.vis,
2908 xw.cmap, &color, &ncolor)) {
2909 return 1;
2910 }
2911
2912 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2913 dc.col[x] = ncolor;
2914 return 0;
2915 } else if(BETWEEN(x, 16 + 216, 255)) { /* greyscale */
2916 color.red = color.green = color.blue = \
2917 0x0808 + 0x0a0a * (x - (16 + 216));
2918 if(!XftColorAllocValue(xw.dpy, xw.vis,
2919 xw.cmap, &color, &ncolor)) {
2920 return 1;
2921 }
2922
2923 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2924 dc.col[x] = ncolor;
2925 return 0;
2926 } else { /* system colors */
2927 name = colorname[x];
2928 }
2929 }
2930 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &ncolor))
2931 return 1;
2932
2933 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2934 dc.col[x] = ncolor;
2935 return 0;
2936 }
2937
2938 void
2939 xtermclear(int col1, int row1, int col2, int row2) {
2940 XftDrawRect(xw.draw,
2941 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2942 borderpx + col1 * xw.cw,
2943 borderpx + row1 * xw.ch,
2944 (col2-col1+1) * xw.cw,
2945 (row2-row1+1) * xw.ch);
2946 }
2947
2948 /*
2949 * Absolute coordinates.
2950 */
2951 void
2952 xclear(int x1, int y1, int x2, int y2) {
2953 XftDrawRect(xw.draw,
2954 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2955 x1, y1, x2-x1, y2-y1);
2956 }
2957
2958 void
2959 xhints(void) {
2960 XClassHint class = {opt_class ? opt_class : termname, termname};
2961 XWMHints wm = {.flags = InputHint, .input = 1};
2962 XSizeHints *sizeh = NULL;
2963
2964 sizeh = XAllocSizeHints();
2965
2966 sizeh->flags = PSize | PResizeInc | PBaseSize;
2967 sizeh->height = xw.h;
2968 sizeh->width = xw.w;
2969 sizeh->height_inc = xw.ch;
2970 sizeh->width_inc = xw.cw;
2971 sizeh->base_height = 2 * borderpx;
2972 sizeh->base_width = 2 * borderpx;
2973 if(xw.isfixed == True) {
2974 sizeh->flags |= PMaxSize | PMinSize;
2975 sizeh->min_width = sizeh->max_width = xw.w;
2976 sizeh->min_height = sizeh->max_height = xw.h;
2977 }
2978 if(xw.gm & (XValue|YValue)) {
2979 sizeh->flags |= USPosition | PWinGravity;
2980 sizeh->x = xw.l;
2981 sizeh->y = xw.t;
2982 sizeh->win_gravity = xgeommasktogravity(xw.gm);
2983 }
2984
2985 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
2986 &class);
2987 XFree(sizeh);
2988 }
2989
2990 int
2991 xgeommasktogravity(int mask) {
2992 switch(mask & (XNegative|YNegative)) {
2993 case 0:
2994 return NorthWestGravity;
2995 case XNegative:
2996 return NorthEastGravity;
2997 case YNegative:
2998 return SouthWestGravity;
2999 }
3000 return SouthEastGravity;
3001 }
3002
3003 int
3004 xloadfont(Font *f, FcPattern *pattern) {
3005 FcPattern *match;
3006 FcResult result;
3007
3008 match = FcFontMatch(NULL, pattern, &result);
3009 if(!match)
3010 return 1;
3011
3012 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
3013 FcPatternDestroy(match);
3014 return 1;
3015 }
3016
3017 f->set = NULL;
3018 f->pattern = FcPatternDuplicate(pattern);
3019
3020 f->ascent = f->match->ascent;
3021 f->descent = f->match->descent;
3022 f->lbearing = 0;
3023 f->rbearing = f->match->max_advance_width;
3024
3025 f->height = f->ascent + f->descent;
3026 f->width = f->lbearing + f->rbearing;
3027
3028 return 0;
3029 }
3030
3031 void
3032 xloadfonts(char *fontstr, double fontsize) {
3033 FcPattern *pattern;
3034 FcResult r_sz, r_psz;
3035 double fontval;
3036 float ceilf(float);
3037
3038 if(fontstr[0] == '-') {
3039 pattern = XftXlfdParse(fontstr, False, False);
3040 } else {
3041 pattern = FcNameParse((FcChar8 *)fontstr);
3042 }
3043
3044 if(!pattern)
3045 die("st: can't open font %s\n", fontstr);
3046
3047 if(fontsize > 1) {
3048 FcPatternDel(pattern, FC_PIXEL_SIZE);
3049 FcPatternDel(pattern, FC_SIZE);
3050 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
3051 usedfontsize = fontsize;
3052 } else {
3053 r_psz = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
3054 r_sz = FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval);
3055 if(r_psz == FcResultMatch) {
3056 usedfontsize = fontval;
3057 } else if(r_sz == FcResultMatch) {
3058 usedfontsize = -1;
3059 } else {
3060 /*
3061 * Default font size is 12, if none given. This is to
3062 * have a known usedfontsize value.
3063 */
3064 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
3065 usedfontsize = 12;
3066 }
3067 defaultfontsize = usedfontsize;
3068 }
3069
3070 FcConfigSubstitute(0, pattern, FcMatchPattern);
3071 FcDefaultSubstitute(pattern);
3072
3073 if(xloadfont(&dc.font, pattern))
3074 die("st: can't open font %s\n", fontstr);
3075
3076 if(usedfontsize < 0) {
3077 FcPatternGetDouble(dc.font.match->pattern,
3078 FC_PIXEL_SIZE, 0, &fontval);
3079 usedfontsize = fontval;
3080 if(fontsize == 0)
3081 defaultfontsize = fontval;
3082 }
3083
3084 /* Setting character width and height. */
3085 xw.cw = ceilf(dc.font.width * cwscale);
3086 xw.ch = ceilf(dc.font.height * chscale);
3087
3088 FcPatternDel(pattern, FC_SLANT);
3089 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
3090 if(xloadfont(&dc.ifont, pattern))
3091 die("st: can't open font %s\n", fontstr);
3092
3093 FcPatternDel(pattern, FC_WEIGHT);
3094 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
3095 if(xloadfont(&dc.ibfont, pattern))
3096 die("st: can't open font %s\n", fontstr);
3097
3098 FcPatternDel(pattern, FC_SLANT);
3099 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
3100 if(xloadfont(&dc.bfont, pattern))
3101 die("st: can't open font %s\n", fontstr);
3102
3103 FcPatternDestroy(pattern);
3104 }
3105
3106 int
3107 xloadfontset(Font *f) {
3108 FcResult result;
3109
3110 if(!(f->set = FcFontSort(0, f->pattern, FcTrue, 0, &result)))
3111 return 1;
3112 return 0;
3113 }
3114
3115 void
3116 xunloadfont(Font *f) {
3117 XftFontClose(xw.dpy, f->match);
3118 FcPatternDestroy(f->pattern);
3119 if(f->set)
3120 FcFontSetDestroy(f->set);
3121 }
3122
3123 void
3124 xunloadfonts(void) {
3125 /* Free the loaded fonts in the font cache. */
3126 while(frclen > 0)
3127 XftFontClose(xw.dpy, frc[--frclen].font);
3128
3129 xunloadfont(&dc.font);
3130 xunloadfont(&dc.bfont);
3131 xunloadfont(&dc.ifont);
3132 xunloadfont(&dc.ibfont);
3133 }
3134
3135 void
3136 xzoom(const Arg *arg) {
3137 Arg larg;
3138
3139 larg.i = usedfontsize + arg->i;
3140 xzoomabs(&larg);
3141 }
3142
3143 void
3144 xzoomabs(const Arg *arg) {
3145 xunloadfonts();
3146 xloadfonts(usedfont, arg->i);
3147 cresize(0, 0);
3148 redraw();
3149 xhints();
3150 }
3151
3152 void
3153 xzoomreset(const Arg *arg) {
3154 Arg larg;
3155
3156 if(defaultfontsize > 0) {
3157 larg.i = defaultfontsize;
3158 xzoomabs(&larg);
3159 }
3160 }
3161
3162 void
3163 xinit(void) {
3164 XGCValues gcvalues;
3165 Cursor cursor;
3166 Window parent;
3167 pid_t thispid = getpid();
3168
3169 if(!(xw.dpy = XOpenDisplay(NULL)))
3170 die("Can't open display\n");
3171 xw.scr = XDefaultScreen(xw.dpy);
3172 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
3173
3174 /* font */
3175 if(!FcInit())
3176 die("Could not init fontconfig.\n");
3177
3178 usedfont = (opt_font == NULL)? font : opt_font;
3179 xloadfonts(usedfont, 0);
3180
3181 /* colors */
3182 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
3183 xloadcols();
3184
3185 /* adjust fixed window geometry */
3186 xw.w = 2 * borderpx + term.col * xw.cw;
3187 xw.h = 2 * borderpx + term.row * xw.ch;
3188 if(xw.gm & XNegative)
3189 xw.l += DisplayWidth(xw.dpy, xw.scr) - xw.w - 2;
3190 if(xw.gm & YNegative)
3191 xw.t += DisplayWidth(xw.dpy, xw.scr) - xw.h - 2;
3192
3193 /* Events */
3194 xw.attrs.background_pixel = dc.col[defaultbg].pixel;
3195 xw.attrs.border_pixel = dc.col[defaultbg].pixel;
3196 xw.attrs.bit_gravity = NorthWestGravity;
3197 xw.attrs.event_mask = FocusChangeMask | KeyPressMask
3198 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
3199 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
3200 xw.attrs.colormap = xw.cmap;
3201
3202 if (!(opt_embed && (parent = strtol(opt_embed, NULL, 0))))
3203 parent = XRootWindow(xw.dpy, xw.scr);
3204 xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
3205 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
3206 xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
3207 | CWEventMask | CWColormap, &xw.attrs);
3208
3209 memset(&gcvalues, 0, sizeof(gcvalues));
3210 gcvalues.graphics_exposures = False;
3211 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
3212 &gcvalues);
3213 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
3214 DefaultDepth(xw.dpy, xw.scr));
3215 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
3216 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
3217
3218 /* Xft rendering context */
3219 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
3220
3221 /* input methods */
3222 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3223 XSetLocaleModifiers("@im=local");
3224 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3225 XSetLocaleModifiers("@im=");
3226 if((xw.xim = XOpenIM(xw.dpy,
3227 NULL, NULL, NULL)) == NULL) {
3228 die("XOpenIM failed. Could not open input"
3229 " device.\n");
3230 }
3231 }
3232 }
3233 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
3234 | XIMStatusNothing, XNClientWindow, xw.win,
3235 XNFocusWindow, xw.win, NULL);
3236 if(xw.xic == NULL)
3237 die("XCreateIC failed. Could not obtain input method.\n");
3238
3239 /* white cursor, black outline */
3240 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
3241 XDefineCursor(xw.dpy, xw.win, cursor);
3242 XRecolorCursor(xw.dpy, cursor,
3243 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
3244 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
3245
3246 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
3247 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
3248 xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
3249 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
3250
3251 xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
3252 XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
3253 PropModeReplace, (uchar *)&thispid, 1);
3254
3255 xresettitle();
3256 XMapWindow(xw.dpy, xw.win);
3257 xhints();
3258 XSync(xw.dpy, False);
3259 }
3260
3261 void
3262 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
3263 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
3264 width = charlen * xw.cw, xp, i;
3265 int frcflags, charexists;
3266 int u8fl, u8fblen, u8cblen, doesexist;
3267 char *u8c, *u8fs;
3268 long unicodep;
3269 Font *font = &dc.font;
3270 FcResult fcres;
3271 FcPattern *fcpattern, *fontpattern;
3272 FcFontSet *fcsets[] = { NULL };
3273 FcCharSet *fccharset;
3274 Color *fg, *bg, *temp, revfg, revbg, truefg, truebg;
3275 XRenderColor colfg, colbg;
3276 XRectangle r;
3277 int oneatatime;
3278
3279 frcflags = FRC_NORMAL;
3280
3281 if(base.mode & ATTR_ITALIC) {
3282 if(base.fg == defaultfg)
3283 base.fg = defaultitalic;
3284 font = &dc.ifont;
3285 frcflags = FRC_ITALIC;
3286 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
3287 if(base.fg == defaultfg)
3288 base.fg = defaultitalic;
3289 font = &dc.ibfont;
3290 frcflags = FRC_ITALICBOLD;
3291 } else if(base.mode & ATTR_UNDERLINE) {
3292 if(base.fg == defaultfg)
3293 base.fg = defaultunderline;
3294 }
3295
3296 if(IS_TRUECOL(base.fg)) {
3297 colfg.alpha = 0xffff;
3298 colfg.red = TRUERED(base.fg);
3299 colfg.green = TRUEGREEN(base.fg);
3300 colfg.blue = TRUEBLUE(base.fg);
3301 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
3302 fg = &truefg;
3303 } else {
3304 fg = &dc.col[base.fg];
3305 }
3306
3307 if(IS_TRUECOL(base.bg)) {
3308 colbg.alpha = 0xffff;
3309 colbg.green = TRUEGREEN(base.bg);
3310 colbg.red = TRUERED(base.bg);
3311 colbg.blue = TRUEBLUE(base.bg);
3312 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
3313 bg = &truebg;
3314 } else {
3315 bg = &dc.col[base.bg];
3316 }
3317
3318 if(base.mode & ATTR_BOLD) {
3319 /*
3320 * change basic system colors [0-7]
3321 * to bright system colors [8-15]
3322 */
3323 if(BETWEEN(base.fg, 0, 7) && !(base.mode & ATTR_FAINT))
3324 fg = &dc.col[base.fg + 8];
3325
3326 if(base.mode & ATTR_ITALIC) {
3327 font = &dc.ibfont;
3328 frcflags = FRC_ITALICBOLD;
3329 } else {
3330 font = &dc.bfont;
3331 frcflags = FRC_BOLD;
3332 }
3333 }
3334
3335 if(IS_SET(MODE_REVERSE)) {
3336 if(fg == &dc.col[defaultfg]) {
3337 fg = &dc.col[defaultbg];
3338 } else {
3339 colfg.red = ~fg->color.red;
3340 colfg.green = ~fg->color.green;
3341 colfg.blue = ~fg->color.blue;
3342 colfg.alpha = fg->color.alpha;
3343 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
3344 &revfg);
3345 fg = &revfg;
3346 }
3347
3348 if(bg == &dc.col[defaultbg]) {
3349 bg = &dc.col[defaultfg];
3350 } else {
3351 colbg.red = ~bg->color.red;
3352 colbg.green = ~bg->color.green;
3353 colbg.blue = ~bg->color.blue;
3354 colbg.alpha = bg->color.alpha;
3355 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
3356 &revbg);
3357 bg = &revbg;
3358 }
3359 }
3360
3361 if(base.mode & ATTR_REVERSE) {
3362 temp = fg;
3363 fg = bg;
3364 bg = temp;
3365 }
3366
3367 if(base.mode & ATTR_FAINT && !(base.mode & ATTR_BOLD)) {
3368 colfg.red = fg->color.red / 2;
3369 colfg.green = fg->color.green / 2;
3370 colfg.blue = fg->color.blue / 2;
3371 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
3372 fg = &revfg;
3373 }
3374
3375 if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
3376 fg = bg;
3377
3378 if(base.mode & ATTR_INVISIBLE)
3379 fg = bg;
3380
3381 /* Intelligent cleaning up of the borders. */
3382 if(x == 0) {
3383 xclear(0, (y == 0)? 0 : winy, borderpx,
3384 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
3385 }
3386 if(x + charlen >= term.col) {
3387 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
3388 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
3389 }
3390 if(y == 0)
3391 xclear(winx, 0, winx + width, borderpx);
3392 if(y == term.row-1)
3393 xclear(winx, winy + xw.ch, winx + width, xw.h);
3394
3395 /* Clean up the region we want to draw to. */
3396 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
3397
3398 /* Set the clip region because Xft is sometimes dirty. */
3399 r.x = 0;
3400 r.y = 0;
3401 r.height = xw.ch;
3402 r.width = width;
3403 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
3404
3405 for(xp = winx; bytelen > 0;) {
3406 /*
3407 * Search for the range in the to be printed string of glyphs
3408 * that are in the main font. Then print that range. If
3409 * some glyph is found that is not in the font, do the
3410 * fallback dance.
3411 */
3412 u8fs = s;
3413 u8fblen = 0;
3414 u8fl = 0;
3415 oneatatime = font->width != xw.cw;
3416 for(;;) {
3417 u8c = s;
3418 u8cblen = utf8decode(s, &unicodep, UTF_SIZ);
3419 s += u8cblen;
3420 bytelen -= u8cblen;
3421
3422 doesexist = XftCharExists(xw.dpy, font->match, unicodep);
3423 if(doesexist) {
3424 u8fl++;
3425 u8fblen += u8cblen;
3426 if(!oneatatime && bytelen > 0)
3427 continue;
3428 }
3429
3430 if(u8fl > 0) {
3431 XftDrawStringUtf8(xw.draw, fg,
3432 font->match, xp,
3433 winy + font->ascent,
3434 (FcChar8 *)u8fs,
3435 u8fblen);
3436 xp += xw.cw * u8fl;
3437 }
3438 break;
3439 }
3440 if(doesexist) {
3441 if(oneatatime)
3442 continue;
3443 break;
3444 }
3445
3446 /* Search the font cache. */
3447 for(i = 0; i < frclen; i++) {
3448 charexists = XftCharExists(xw.dpy, frc[i].font, unicodep);
3449 /* Everything correct. */
3450 if(charexists && frc[i].flags == frcflags)
3451 break;
3452 /* We got a default font for a not found glyph. */
3453 if(!charexists && frc[i].flags == frcflags \
3454 && frc[i].unicodep == unicodep) {
3455 break;
3456 }
3457 }
3458
3459 /* Nothing was found. */
3460 if(i >= frclen) {
3461 if(!font->set)
3462 xloadfontset(font);
3463 fcsets[0] = font->set;
3464
3465 /*
3466 * Nothing was found in the cache. Now use
3467 * some dozen of Fontconfig calls to get the
3468 * font for one single character.
3469 *
3470 * Xft and fontconfig are design failures.
3471 */
3472 fcpattern = FcPatternDuplicate(font->pattern);
3473 fccharset = FcCharSetCreate();
3474
3475 FcCharSetAddChar(fccharset, unicodep);
3476 FcPatternAddCharSet(fcpattern, FC_CHARSET,
3477 fccharset);
3478 FcPatternAddBool(fcpattern, FC_SCALABLE,
3479 FcTrue);
3480
3481 FcConfigSubstitute(0, fcpattern,
3482 FcMatchPattern);
3483 FcDefaultSubstitute(fcpattern);
3484
3485 fontpattern = FcFontSetMatch(0, fcsets, 1,
3486 fcpattern, &fcres);
3487
3488 /*
3489 * Overwrite or create the new cache entry.
3490 */
3491 if(frclen >= LEN(frc)) {
3492 frclen = LEN(frc) - 1;
3493 XftFontClose(xw.dpy, frc[frclen].font);
3494 frc[frclen].unicodep = 0;
3495 }
3496
3497 frc[frclen].font = XftFontOpenPattern(xw.dpy,
3498 fontpattern);
3499 frc[frclen].flags = frcflags;
3500 frc[frclen].unicodep = unicodep;
3501
3502 i = frclen;
3503 frclen++;
3504
3505 FcPatternDestroy(fcpattern);
3506 FcCharSetDestroy(fccharset);
3507 }
3508
3509 XftDrawStringUtf8(xw.draw, fg, frc[i].font,
3510 xp, winy + frc[i].font->ascent,
3511 (FcChar8 *)u8c, u8cblen);
3512
3513 xp += xw.cw * wcwidth(unicodep);
3514 }
3515
3516 /*
3517 * This is how the loop above actually should be. Why does the
3518 * application have to care about font details?
3519 *
3520 * I have to repeat: Xft and Fontconfig are design failures.
3521 */
3522 /*
3523 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
3524 winy + font->ascent, (FcChar8 *)s, bytelen);
3525 */
3526
3527 if(base.mode & ATTR_UNDERLINE) {
3528 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
3529 width, 1);
3530 }
3531
3532 if(base.mode & ATTR_STRUCK) {
3533 XftDrawRect(xw.draw, fg, winx, winy + 2 * font->ascent / 3,
3534 width, 1);
3535 }
3536
3537 /* Reset clip to none. */
3538 XftDrawSetClip(xw.draw, 0);
3539 }
3540
3541 void
3542 xdrawcursor(void) {
3543 static int oldx = 0, oldy = 0;
3544 int sl, width, curx;
3545 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
3546
3547 LIMIT(oldx, 0, term.col-1);
3548 LIMIT(oldy, 0, term.row-1);
3549
3550 curx = term.c.x;
3551
3552 /* adjust position if in dummy */
3553 if(term.line[oldy][oldx].mode & ATTR_WDUMMY)
3554 oldx--;
3555 if(term.line[term.c.y][curx].mode & ATTR_WDUMMY)
3556 curx--;
3557
3558 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
3559
3560 /* remove the old cursor */
3561 sl = utf8len(term.line[oldy][oldx].c);
3562 width = (term.line[oldy][oldx].mode & ATTR_WIDE)? 2 : 1;
3563 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
3564 oldy, width, sl);
3565
3566 if(IS_SET(MODE_HIDE))
3567 return;
3568
3569 /* draw the new one */
3570 if(xw.state & WIN_FOCUSED) {
3571 switch (xw.cursor) {
3572 case 0: /* Blinking Block */
3573 case 1: /* Blinking Block (Default) */
3574 case 2: /* Steady Block */
3575 if(IS_SET(MODE_REVERSE)) {
3576 g.mode |= ATTR_REVERSE;
3577 g.fg = defaultcs;
3578 g.bg = defaultfg;
3579 }
3580
3581 sl = utf8len(g.c);
3582 width = (term.line[term.c.y][curx].mode & ATTR_WIDE)\
3583 ? 2 : 1;
3584 xdraws(g.c, g, term.c.x, term.c.y, width, sl);
3585 break;
3586 case 3: /* Blinking Underline */
3587 case 4: /* Steady Underline */
3588 XftDrawRect(xw.draw, &dc.col[defaultcs],
3589 borderpx + curx * xw.cw,
3590 borderpx + (term.c.y + 1) * xw.ch - 1,
3591 xw.cw, 1);
3592 break;
3593 case 5: /* Blinking bar */
3594 case 6: /* Steady bar */
3595 XftDrawRect(xw.draw, &dc.col[defaultcs],
3596 borderpx + curx * xw.cw,
3597 borderpx + term.c.y * xw.ch,
3598 1, xw.ch);
3599 break;
3600 }
3601 } else {
3602 XftDrawRect(xw.draw, &dc.col[defaultcs],
3603 borderpx + curx * xw.cw,
3604 borderpx + term.c.y * xw.ch,
3605 xw.cw - 1, 1);
3606 XftDrawRect(xw.draw, &dc.col[defaultcs],
3607 borderpx + curx * xw.cw,
3608 borderpx + term.c.y * xw.ch,
3609 1, xw.ch - 1);
3610 XftDrawRect(xw.draw, &dc.col[defaultcs],
3611 borderpx + (curx + 1) * xw.cw - 1,
3612 borderpx + term.c.y * xw.ch,
3613 1, xw.ch - 1);
3614 XftDrawRect(xw.draw, &dc.col[defaultcs],
3615 borderpx + curx * xw.cw,
3616 borderpx + (term.c.y + 1) * xw.ch - 1,
3617 xw.cw, 1);
3618 }
3619 oldx = curx, oldy = term.c.y;
3620 }
3621
3622
3623 void
3624 xsettitle(char *p) {
3625 XTextProperty prop;
3626
3627 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3628 &prop);
3629 XSetWMName(xw.dpy, xw.win, &prop);
3630 XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
3631 XFree(prop.value);
3632 }
3633
3634 void
3635 xresettitle(void) {
3636 xsettitle(opt_title ? opt_title : "st");
3637 }
3638
3639 void
3640 redraw(void) {
3641 tfulldirt();
3642 draw();
3643 }
3644
3645 void
3646 draw(void) {
3647 drawregion(0, 0, term.col, term.row);
3648 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3649 xw.h, 0, 0);
3650 XSetForeground(xw.dpy, dc.gc,
3651 dc.col[IS_SET(MODE_REVERSE)?
3652 defaultfg : defaultbg].pixel);
3653 }
3654
3655 void
3656 drawregion(int x1, int y1, int x2, int y2) {
3657 int ic, ib, x, y, ox, sl;
3658 Glyph base, new;
3659 char buf[DRAW_BUF_SIZ];
3660 bool ena_sel = sel.ob.x != -1 && sel.alt == IS_SET(MODE_ALTSCREEN);
3661 long unicodep;
3662
3663 if(!(xw.state & WIN_VISIBLE))
3664 return;
3665
3666 for(y = y1; y < y2; y++) {
3667 if(!term.dirty[y])
3668 continue;
3669
3670 xtermclear(0, y, term.col, y);
3671 term.dirty[y] = 0;
3672 base = term.line[y][0];
3673 ic = ib = ox = 0;
3674 for(x = x1; x < x2; x++) {
3675 new = term.line[y][x];
3676 if(new.mode == ATTR_WDUMMY)
3677 continue;
3678 if(ena_sel && selected(x, y))
3679 new.mode ^= ATTR_REVERSE;
3680 if(ib > 0 && (ATTRCMP(base, new)
3681 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3682 xdraws(buf, base, ox, y, ic, ib);
3683 ic = ib = 0;
3684 }
3685 if(ib == 0) {
3686 ox = x;
3687 base = new;
3688 }
3689
3690 sl = utf8decode(new.c, &unicodep, UTF_SIZ);
3691 memcpy(buf+ib, new.c, sl);
3692 ib += sl;
3693 ic += (new.mode & ATTR_WIDE)? 2 : 1;
3694 }
3695 if(ib > 0)
3696 xdraws(buf, base, ox, y, ic, ib);
3697 }
3698 xdrawcursor();
3699 }
3700
3701 void
3702 expose(XEvent *ev) {
3703 XExposeEvent *e = &ev->xexpose;
3704
3705 if(xw.state & WIN_REDRAW) {
3706 if(!e->count)
3707 xw.state &= ~WIN_REDRAW;
3708 }
3709 redraw();
3710 }
3711
3712 void
3713 visibility(XEvent *ev) {
3714 XVisibilityEvent *e = &ev->xvisibility;
3715
3716 if(e->state == VisibilityFullyObscured) {
3717 xw.state &= ~WIN_VISIBLE;
3718 } else if(!(xw.state & WIN_VISIBLE)) {
3719 /* need a full redraw for next Expose, not just a buf copy */
3720 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3721 }
3722 }
3723
3724 void
3725 unmap(XEvent *ev) {
3726 xw.state &= ~WIN_VISIBLE;
3727 }
3728
3729 void
3730 xsetpointermotion(int set) {
3731 MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
3732 XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
3733 }
3734
3735 void
3736 xseturgency(int add) {
3737 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3738
3739 MODBIT(h->flags, add, XUrgencyHint);
3740 XSetWMHints(xw.dpy, xw.win, h);
3741 XFree(h);
3742 }
3743
3744 void
3745 focus(XEvent *ev) {
3746 XFocusChangeEvent *e = &ev->xfocus;
3747
3748 if(e->mode == NotifyGrab)
3749 return;
3750
3751 if(ev->type == FocusIn) {
3752 XSetICFocus(xw.xic);
3753 xw.state |= WIN_FOCUSED;
3754 xseturgency(0);
3755 if(IS_SET(MODE_FOCUS))
3756 ttywrite("\033[I", 3);
3757 } else {
3758 XUnsetICFocus(xw.xic);
3759 xw.state &= ~WIN_FOCUSED;
3760 if(IS_SET(MODE_FOCUS))
3761 ttywrite("\033[O", 3);
3762 }
3763 }
3764
3765 static inline bool
3766 match(uint mask, uint state) {
3767 return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
3768 }
3769
3770 void
3771 numlock(const Arg *dummy) {
3772 term.numlock ^= 1;
3773 }
3774
3775 char*
3776 kmap(KeySym k, uint state) {
3777 Key *kp;
3778 int i;
3779
3780 /* Check for mapped keys out of X11 function keys. */
3781 for(i = 0; i < LEN(mappedkeys); i++) {
3782 if(mappedkeys[i] == k)
3783 break;
3784 }
3785 if(i == LEN(mappedkeys)) {
3786 if((k & 0xFFFF) < 0xFD00)
3787 return NULL;
3788 }
3789
3790 for(kp = key; kp < key + LEN(key); kp++) {
3791 if(kp->k != k)
3792 continue;
3793
3794 if(!match(kp->mask, state))
3795 continue;
3796
3797 if(IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
3798 continue;
3799 if(term.numlock && kp->appkey == 2)
3800 continue;
3801
3802 if(IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
3803 continue;
3804
3805 if(IS_SET(MODE_CRLF) ? kp->crlf < 0 : kp->crlf > 0)
3806 continue;
3807
3808 return kp->s;
3809 }
3810
3811 return NULL;
3812 }
3813
3814 void
3815 kpress(XEvent *ev) {
3816 XKeyEvent *e = &ev->xkey;
3817 KeySym ksym;
3818 char buf[32], *customkey;
3819 int len;
3820 long c;
3821 Status status;
3822 Shortcut *bp;
3823
3824 if(IS_SET(MODE_KBDLOCK))
3825 return;
3826
3827 len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
3828 /* 1. shortcuts */
3829 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3830 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3831 bp->func(&(bp->arg));
3832 return;
3833 }
3834 }
3835
3836 /* 2. custom keys from config.h */
3837 if((customkey = kmap(ksym, e->state))) {
3838 ttysend(customkey, strlen(customkey));
3839 return;
3840 }
3841
3842 /* 3. composed string from input method */
3843 if(len == 0)
3844 return;
3845 if(len == 1 && e->state & Mod1Mask) {
3846 if(IS_SET(MODE_8BIT)) {
3847 if(*buf < 0177) {
3848 c = *buf | 0x80;
3849 len = utf8encode(c, buf, UTF_SIZ);
3850 }
3851 } else {
3852 buf[1] = buf[0];
3853 buf[0] = '\033';
3854 len = 2;
3855 }
3856 }
3857 ttysend(buf, len);
3858 }
3859
3860
3861 void
3862 cmessage(XEvent *e) {
3863 /*
3864 * See xembed specs
3865 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3866 */
3867 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3868 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3869 xw.state |= WIN_FOCUSED;
3870 xseturgency(0);
3871 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3872 xw.state &= ~WIN_FOCUSED;
3873 }
3874 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3875 /* Send SIGHUP to shell */
3876 kill(pid, SIGHUP);
3877 exit(EXIT_SUCCESS);
3878 }
3879 }
3880
3881 void
3882 cresize(int width, int height) {
3883 int col, row;
3884
3885 if(width != 0)
3886 xw.w = width;
3887 if(height != 0)
3888 xw.h = height;
3889
3890 col = (xw.w - 2 * borderpx) / xw.cw;
3891 row = (xw.h - 2 * borderpx) / xw.ch;
3892
3893 tresize(col, row);
3894 xresize(col, row);
3895 ttyresize();
3896 }
3897
3898 void
3899 resize(XEvent *e) {
3900 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3901 return;
3902
3903 cresize(e->xconfigure.width, e->xconfigure.height);
3904 }
3905
3906 void
3907 run(void) {
3908 XEvent ev;
3909 int w = xw.w, h = xw.h;
3910 fd_set rfd;
3911 int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3912 struct timespec drawtimeout, *tv = NULL, now, last, lastblink;
3913 long deltatime;
3914
3915 /* Waiting for window mapping */
3916 while(1) {
3917 XNextEvent(xw.dpy, &ev);
3918 if(XFilterEvent(&ev, None))
3919 continue;
3920 if(ev.type == ConfigureNotify) {
3921 w = ev.xconfigure.width;
3922 h = ev.xconfigure.height;
3923 } else if(ev.type == MapNotify) {
3924 break;
3925 }
3926 }
3927
3928 ttynew();
3929 cresize(w, h);
3930
3931 clock_gettime(CLOCK_MONOTONIC, &last);
3932 lastblink = last;
3933
3934 for(xev = actionfps;;) {
3935 FD_ZERO(&rfd);
3936 FD_SET(cmdfd, &rfd);
3937 FD_SET(xfd, &rfd);
3938
3939 if(pselect(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv, NULL) < 0) {
3940 if(errno == EINTR)
3941 continue;
3942 die("select failed: %s\n", strerror(errno));
3943 }
3944 if(FD_ISSET(cmdfd, &rfd)) {
3945 ttyread();
3946 if(blinktimeout) {
3947 blinkset = tattrset(ATTR_BLINK);
3948 if(!blinkset)
3949 MODBIT(term.mode, 0, MODE_BLINK);
3950 }
3951 }
3952
3953 if(FD_ISSET(xfd, &rfd))
3954 xev = actionfps;
3955
3956 clock_gettime(CLOCK_MONOTONIC, &now);
3957 drawtimeout.tv_sec = 0;
3958 drawtimeout.tv_nsec = (1000/xfps) * 1E6;
3959 tv = &drawtimeout;
3960
3961 dodraw = 0;
3962 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
3963 tsetdirtattr(ATTR_BLINK);
3964 term.mode ^= MODE_BLINK;
3965 lastblink = now;
3966 dodraw = 1;
3967 }
3968 deltatime = TIMEDIFF(now, last);
3969 if(deltatime > (xev? (1000/xfps) : (1000/actionfps))
3970 || deltatime < 0) {
3971 dodraw = 1;
3972 last = now;
3973 }
3974
3975 if(dodraw) {
3976 while(XPending(xw.dpy)) {
3977 XNextEvent(xw.dpy, &ev);
3978 if(XFilterEvent(&ev, None))
3979 continue;
3980 if(handler[ev.type])
3981 (handler[ev.type])(&ev);
3982 }
3983
3984 draw();
3985 XFlush(xw.dpy);
3986
3987 if(xev && !FD_ISSET(xfd, &rfd))
3988 xev--;
3989 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
3990 if(blinkset) {
3991 if(TIMEDIFF(now, lastblink) \
3992 > blinktimeout) {
3993 drawtimeout.tv_nsec = 1000;
3994 } else {
3995 drawtimeout.tv_nsec = (1E6 * \
3996 (blinktimeout - \
3997 TIMEDIFF(now,
3998 lastblink)));
3999 }
4000 drawtimeout.tv_sec = \
4001 drawtimeout.tv_nsec / 1E9;
4002 drawtimeout.tv_nsec %= (long)1E9;
4003 } else {
4004 tv = NULL;
4005 }
4006 }
4007 }
4008 }
4009 }
4010
4011 void
4012 usage(void) {
4013 die("%s " VERSION " (c) 2010-2015 st engineers\n" \
4014 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]\n"
4015 " [-i] [-t title] [-w windowid] [-e command ...]\n", argv0);
4016 }
4017
4018 int
4019 main(int argc, char *argv[]) {
4020 char *titles;
4021 uint cols = 80, rows = 24;
4022
4023 xw.l = xw.t = 0;
4024 xw.isfixed = False;
4025 xw.cursor = 0;
4026
4027 ARGBEGIN {
4028 case 'a':
4029 allowaltscreen = false;
4030 break;
4031 case 'c':
4032 opt_class = EARGF(usage());
4033 break;
4034 case 'e':
4035 /* eat all remaining arguments */
4036 if(argc > 1) {
4037 opt_cmd = &argv[1];
4038 if(argv[1] != NULL && opt_title == NULL) {
4039 titles = xstrdup(argv[1]);
4040 opt_title = basename(titles);
4041 }
4042 }
4043 goto run;
4044 case 'f':
4045 opt_font = EARGF(usage());
4046 break;
4047 case 'g':
4048 xw.gm = XParseGeometry(EARGF(usage()),
4049 &xw.l, &xw.t, &cols, &rows);
4050 break;
4051 case 'i':
4052 xw.isfixed = True;
4053 break;
4054 case 'o':
4055 opt_io = EARGF(usage());
4056 break;
4057 case 't':
4058 opt_title = EARGF(usage());
4059 break;
4060 case 'w':
4061 opt_embed = EARGF(usage());
4062 break;
4063 case 'v':
4064 default:
4065 usage();
4066 } ARGEND;
4067
4068 run:
4069 setlocale(LC_CTYPE, "");
4070 XSetLocaleModifiers("");
4071 tnew(cols? cols : 1, rows? rows : 1);
4072 xinit();
4073 selinit();
4074 run();
4075
4076 return 0;
4077 }
4078