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c7589f490daecc4c806011b4eb392907af2ac681
[st.git] / st.c
1 /* See LICENSE for license details. */
2 #include <ctype.h>
3 #include <errno.h>
4 #include <fcntl.h>
5 #include <limits.h>
6 #include <locale.h>
7 #include <pwd.h>
8 #include <stdarg.h>
9 #include <stdbool.h>
10 #include <stdio.h>
11 #include <stdlib.h>
12 #include <string.h>
13 #include <signal.h>
14 #include <stdint.h>
15 #include <sys/ioctl.h>
16 #include <sys/select.h>
17 #include <sys/stat.h>
18 #include <sys/time.h>
19 #include <sys/types.h>
20 #include <sys/wait.h>
21 #include <time.h>
22 #include <unistd.h>
23 #include <libgen.h>
24 #include <X11/Xatom.h>
25 #include <X11/Xlib.h>
26 #include <X11/Xutil.h>
27 #include <X11/cursorfont.h>
28 #include <X11/keysym.h>
29 #include <X11/Xft/Xft.h>
30 #include <X11/XKBlib.h>
31 #include <fontconfig/fontconfig.h>
32 #include <wchar.h>
33
34 #include "arg.h"
35
36 char *argv0;
37
38 #define Glyph Glyph_
39 #define Font Font_
40
41 #if defined(__linux)
42 #include <pty.h>
43 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
44 #include <util.h>
45 #elif defined(__FreeBSD__) || defined(__DragonFly__)
46 #include <libutil.h>
47 #endif
48
49
50 /* XEMBED messages */
51 #define XEMBED_FOCUS_IN 4
52 #define XEMBED_FOCUS_OUT 5
53
54 /* Arbitrary sizes */
55 #define UTF_INVALID 0xFFFD
56 #define UTF_SIZ 4
57 #define ESC_BUF_SIZ (128*UTF_SIZ)
58 #define ESC_ARG_SIZ 16
59 #define STR_BUF_SIZ ESC_BUF_SIZ
60 #define STR_ARG_SIZ ESC_ARG_SIZ
61 #define DRAW_BUF_SIZ 20*1024
62 #define XK_ANY_MOD UINT_MAX
63 #define XK_NO_MOD 0
64 #define XK_SWITCH_MOD (1<<13)
65
66 /* macros */
67 #define MIN(a, b) ((a) < (b) ? (a) : (b))
68 #define MAX(a, b) ((a) < (b) ? (b) : (a))
69 #define LEN(a) (sizeof(a) / sizeof(a)[0])
70 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
71 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
72 #define ISCONTROLC0(c) (BETWEEN(c, 0, 0x1f) || (c) == '\177')
73 #define ISCONTROLC1(c) (BETWEEN(c, 0x80, 0x9f))
74 #define ISCONTROL(c) (ISCONTROLC0(c) || ISCONTROLC1(c))
75 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
76 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
77 #define IS_SET(flag) ((term.mode & (flag)) != 0)
78 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_nsec-t2.tv_nsec)/1E6)
79 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
80
81 #define TRUECOLOR(r,g,b) (1 << 24 | (r) << 16 | (g) << 8 | (b))
82 #define IS_TRUECOL(x) (1 << 24 & (x))
83 #define TRUERED(x) (((x) & 0xff0000) >> 8)
84 #define TRUEGREEN(x) (((x) & 0xff00))
85 #define TRUEBLUE(x) (((x) & 0xff) << 8)
86
87
88 enum glyph_attribute {
89 ATTR_NULL = 0,
90 ATTR_BOLD = 1 << 0,
91 ATTR_FAINT = 1 << 1,
92 ATTR_ITALIC = 1 << 2,
93 ATTR_UNDERLINE = 1 << 3,
94 ATTR_BLINK = 1 << 4,
95 ATTR_REVERSE = 1 << 5,
96 ATTR_INVISIBLE = 1 << 6,
97 ATTR_STRUCK = 1 << 7,
98 ATTR_WRAP = 1 << 8,
99 ATTR_WIDE = 1 << 9,
100 ATTR_WDUMMY = 1 << 10,
101 };
102
103 enum cursor_movement {
104 CURSOR_SAVE,
105 CURSOR_LOAD
106 };
107
108 enum cursor_state {
109 CURSOR_DEFAULT = 0,
110 CURSOR_WRAPNEXT = 1,
111 CURSOR_ORIGIN = 2
112 };
113
114 enum term_mode {
115 MODE_WRAP = 1 << 0,
116 MODE_INSERT = 1 << 1,
117 MODE_APPKEYPAD = 1 << 2,
118 MODE_ALTSCREEN = 1 << 3,
119 MODE_CRLF = 1 << 4,
120 MODE_MOUSEBTN = 1 << 5,
121 MODE_MOUSEMOTION = 1 << 6,
122 MODE_REVERSE = 1 << 7,
123 MODE_KBDLOCK = 1 << 8,
124 MODE_HIDE = 1 << 9,
125 MODE_ECHO = 1 << 10,
126 MODE_APPCURSOR = 1 << 11,
127 MODE_MOUSESGR = 1 << 12,
128 MODE_8BIT = 1 << 13,
129 MODE_BLINK = 1 << 14,
130 MODE_FBLINK = 1 << 15,
131 MODE_FOCUS = 1 << 16,
132 MODE_MOUSEX10 = 1 << 17,
133 MODE_MOUSEMANY = 1 << 18,
134 MODE_BRCKTPASTE = 1 << 19,
135 MODE_PRINT = 1 << 20,
136 MODE_MOUSE = MODE_MOUSEBTN|MODE_MOUSEMOTION|MODE_MOUSEX10\
137 |MODE_MOUSEMANY,
138 };
139
140 enum charset {
141 CS_GRAPHIC0,
142 CS_GRAPHIC1,
143 CS_UK,
144 CS_USA,
145 CS_MULTI,
146 CS_GER,
147 CS_FIN
148 };
149
150 enum escape_state {
151 ESC_START = 1,
152 ESC_CSI = 2,
153 ESC_STR = 4, /* DCS, OSC, PM, APC */
154 ESC_ALTCHARSET = 8,
155 ESC_STR_END = 16, /* a final string was encountered */
156 ESC_TEST = 32, /* Enter in test mode */
157 };
158
159 enum window_state {
160 WIN_VISIBLE = 1,
161 WIN_REDRAW = 2,
162 WIN_FOCUSED = 4
163 };
164
165 enum selection_type {
166 SEL_REGULAR = 1,
167 SEL_RECTANGULAR = 2
168 };
169
170 enum selection_snap {
171 SNAP_WORD = 1,
172 SNAP_LINE = 2
173 };
174
175 typedef unsigned char uchar;
176 typedef unsigned int uint;
177 typedef unsigned long ulong;
178 typedef unsigned short ushort;
179
180 typedef XftDraw *Draw;
181 typedef XftColor Color;
182
183 typedef struct {
184 char c[UTF_SIZ]; /* character code */
185 ushort mode; /* attribute flags */
186 uint32_t fg; /* foreground */
187 uint32_t bg; /* background */
188 } Glyph;
189
190 typedef Glyph *Line;
191
192 typedef struct {
193 Glyph attr; /* current char attributes */
194 int x;
195 int y;
196 char state;
197 } TCursor;
198
199 /* CSI Escape sequence structs */
200 /* ESC '[' [[ [<priv>] <arg> [;]] <mode> [<mode>]] */
201 typedef struct {
202 char buf[ESC_BUF_SIZ]; /* raw string */
203 int len; /* raw string length */
204 char priv;
205 int arg[ESC_ARG_SIZ];
206 int narg; /* nb of args */
207 char mode[2];
208 } CSIEscape;
209
210 /* STR Escape sequence structs */
211 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
212 typedef struct {
213 char type; /* ESC type ... */
214 char buf[STR_BUF_SIZ]; /* raw string */
215 int len; /* raw string length */
216 char *args[STR_ARG_SIZ];
217 int narg; /* nb of args */
218 } STREscape;
219
220 /* Internal representation of the screen */
221 typedef struct {
222 int row; /* nb row */
223 int col; /* nb col */
224 Line *line; /* screen */
225 Line *alt; /* alternate screen */
226 bool *dirty; /* dirtyness of lines */
227 TCursor c; /* cursor */
228 int top; /* top scroll limit */
229 int bot; /* bottom scroll limit */
230 int mode; /* terminal mode flags */
231 int esc; /* escape state flags */
232 char trantbl[4]; /* charset table translation */
233 int charset; /* current charset */
234 int icharset; /* selected charset for sequence */
235 bool numlock; /* lock numbers in keyboard */
236 bool *tabs;
237 } Term;
238
239 /* Purely graphic info */
240 typedef struct {
241 Display *dpy;
242 Colormap cmap;
243 Window win;
244 Drawable buf;
245 Atom xembed, wmdeletewin, netwmname, netwmpid;
246 XIM xim;
247 XIC xic;
248 Draw draw;
249 Visual *vis;
250 XSetWindowAttributes attrs;
251 int scr;
252 bool isfixed; /* is fixed geometry? */
253 int l, t; /* left and top offset */
254 int gm; /* geometry mask */
255 int tw, th; /* tty width and height */
256 int w, h; /* window width and height */
257 int ch; /* char height */
258 int cw; /* char width */
259 char state; /* focus, redraw, visible */
260 int cursor; /* cursor style */
261 } XWindow;
262
263 typedef struct {
264 uint b;
265 uint mask;
266 char *s;
267 } Mousekey;
268
269 typedef struct {
270 KeySym k;
271 uint mask;
272 char *s;
273 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
274 signed char appkey; /* application keypad */
275 signed char appcursor; /* application cursor */
276 signed char crlf; /* crlf mode */
277 } Key;
278
279 typedef struct {
280 int mode;
281 int type;
282 int snap;
283 /*
284 * Selection variables:
285 * nb – normalized coordinates of the beginning of the selection
286 * ne – normalized coordinates of the end of the selection
287 * ob – original coordinates of the beginning of the selection
288 * oe – original coordinates of the end of the selection
289 */
290 struct {
291 int x, y;
292 } nb, ne, ob, oe;
293
294 char *primary, *clipboard;
295 Atom xtarget;
296 bool alt;
297 struct timespec tclick1;
298 struct timespec tclick2;
299 } Selection;
300
301 typedef union {
302 int i;
303 uint ui;
304 float f;
305 const void *v;
306 } Arg;
307
308 typedef struct {
309 uint mod;
310 KeySym keysym;
311 void (*func)(const Arg *);
312 const Arg arg;
313 } Shortcut;
314
315 /* function definitions used in config.h */
316 static void clipcopy(const Arg *);
317 static void clippaste(const Arg *);
318 static void numlock(const Arg *);
319 static void selpaste(const Arg *);
320 static void xzoom(const Arg *);
321 static void xzoomabs(const Arg *);
322 static void xzoomreset(const Arg *);
323 static void printsel(const Arg *);
324 static void printscreen(const Arg *) ;
325 static void toggleprinter(const Arg *);
326
327 /* Config.h for applying patches and the configuration. */
328 #include "config.h"
329
330 /* Font structure */
331 typedef struct {
332 int height;
333 int width;
334 int ascent;
335 int descent;
336 short lbearing;
337 short rbearing;
338 XftFont *match;
339 FcFontSet *set;
340 FcPattern *pattern;
341 } Font;
342
343 /* Drawing Context */
344 typedef struct {
345 Color col[MAX(LEN(colorname), 256)];
346 Font font, bfont, ifont, ibfont;
347 GC gc;
348 } DC;
349
350 static void die(const char *, ...);
351 static void draw(void);
352 static void redraw(void);
353 static void drawregion(int, int, int, int);
354 static void execsh(void);
355 static void stty(void);
356 static void sigchld(int);
357 static void run(void);
358
359 static void csidump(void);
360 static void csihandle(void);
361 static void csiparse(void);
362 static void csireset(void);
363 static int eschandle(uchar);
364 static void strdump(void);
365 static void strhandle(void);
366 static void strparse(void);
367 static void strreset(void);
368
369 static int tattrset(int);
370 static void tprinter(char *, size_t);
371 static void tdumpsel(void);
372 static void tdumpline(int);
373 static void tdump(void);
374 static void tclearregion(int, int, int, int);
375 static void tcursor(int);
376 static void tdeletechar(int);
377 static void tdeleteline(int);
378 static void tinsertblank(int);
379 static void tinsertblankline(int);
380 static int tlinelen(int);
381 static void tmoveto(int, int);
382 static void tmoveato(int, int);
383 static void tnew(int, int);
384 static void tnewline(int);
385 static void tputtab(int);
386 static void tputc(char *, int);
387 static void treset(void);
388 static void tresize(int, int);
389 static void tscrollup(int, int);
390 static void tscrolldown(int, int);
391 static void tsetattr(int *, int);
392 static void tsetchar(char *, Glyph *, int, int);
393 static void tsetscroll(int, int);
394 static void tswapscreen(void);
395 static void tsetdirt(int, int);
396 static void tsetdirtattr(int);
397 static void tsetmode(bool, bool, int *, int);
398 static void tfulldirt(void);
399 static void techo(char *, int);
400 static void tcontrolcode(uchar );
401 static void tdectest(char );
402 static int32_t tdefcolor(int *, int *, int);
403 static void tdeftran(char);
404 static inline bool match(uint, uint);
405 static void ttynew(void);
406 static void ttyread(void);
407 static void ttyresize(void);
408 static void ttysend(char *, size_t);
409 static void ttywrite(const char *, size_t);
410 static void tstrsequence(uchar);
411
412 static inline ushort sixd_to_16bit(int);
413 static void xdraws(char *, Glyph, int, int, int, int);
414 static void xhints(void);
415 static void xclear(int, int, int, int);
416 static void xdrawcursor(void);
417 static void xinit(void);
418 static void xloadcols(void);
419 static int xsetcolorname(int, const char *);
420 static int xgeommasktogravity(int);
421 static int xloadfont(Font *, FcPattern *);
422 static void xloadfonts(char *, double);
423 static void xsettitle(char *);
424 static void xresettitle(void);
425 static void xsetpointermotion(int);
426 static void xseturgency(int);
427 static void xsetsel(char *, Time);
428 static void xtermclear(int, int, int, int);
429 static void xunloadfont(Font *);
430 static void xunloadfonts(void);
431 static void xresize(int, int);
432
433 static void expose(XEvent *);
434 static void visibility(XEvent *);
435 static void unmap(XEvent *);
436 static char *kmap(KeySym, uint);
437 static void kpress(XEvent *);
438 static void cmessage(XEvent *);
439 static void cresize(int, int);
440 static void resize(XEvent *);
441 static void focus(XEvent *);
442 static void brelease(XEvent *);
443 static void bpress(XEvent *);
444 static void bmotion(XEvent *);
445 static void selnotify(XEvent *);
446 static void selclear(XEvent *);
447 static void selrequest(XEvent *);
448
449 static void selinit(void);
450 static void selnormalize(void);
451 static inline bool selected(int, int);
452 static char *getsel(void);
453 static void selcopy(Time);
454 static void selscroll(int, int);
455 static void selsnap(int, int *, int *, int);
456 static int x2col(int);
457 static int y2row(int);
458 static void getbuttoninfo(XEvent *);
459 static void mousereport(XEvent *);
460
461 static size_t utf8decode(char *, long *, size_t);
462 static long utf8decodebyte(char, size_t *);
463 static size_t utf8encode(long, char *, size_t);
464 static char utf8encodebyte(long, size_t);
465 static size_t utf8len(char *);
466 static size_t utf8validate(long *, size_t);
467
468 static ssize_t xwrite(int, const char *, size_t);
469 static void *xmalloc(size_t);
470 static void *xrealloc(void *, size_t);
471 static char *xstrdup(char *);
472
473 static void usage(void);
474
475 static void (*handler[LASTEvent])(XEvent *) = {
476 [KeyPress] = kpress,
477 [ClientMessage] = cmessage,
478 [ConfigureNotify] = resize,
479 [VisibilityNotify] = visibility,
480 [UnmapNotify] = unmap,
481 [Expose] = expose,
482 [FocusIn] = focus,
483 [FocusOut] = focus,
484 [MotionNotify] = bmotion,
485 [ButtonPress] = bpress,
486 [ButtonRelease] = brelease,
487 /*
488 * Uncomment if you want the selection to disappear when you select something
489 * different in another window.
490 */
491 /* [SelectionClear] = selclear, */
492 [SelectionNotify] = selnotify,
493 [SelectionRequest] = selrequest,
494 };
495
496 /* Globals */
497 static DC dc;
498 static XWindow xw;
499 static Term term;
500 static CSIEscape csiescseq;
501 static STREscape strescseq;
502 static int cmdfd;
503 static pid_t pid;
504 static Selection sel;
505 static int iofd = STDOUT_FILENO;
506 static char **opt_cmd = NULL;
507 static char *opt_io = NULL;
508 static char *opt_title = NULL;
509 static char *opt_embed = NULL;
510 static char *opt_class = NULL;
511 static char *opt_font = NULL;
512 static char *opt_line = NULL;
513 static int oldbutton = 3; /* button event on startup: 3 = release */
514
515 static char *usedfont = NULL;
516 static double usedfontsize = 0;
517 static double defaultfontsize = 0;
518
519 static uchar utfbyte[UTF_SIZ + 1] = {0x80, 0, 0xC0, 0xE0, 0xF0};
520 static uchar utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
521 static long utfmin[UTF_SIZ + 1] = { 0, 0, 0x80, 0x800, 0x10000};
522 static long utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
523
524 /* Font Ring Cache */
525 enum {
526 FRC_NORMAL,
527 FRC_ITALIC,
528 FRC_BOLD,
529 FRC_ITALICBOLD
530 };
531
532 typedef struct {
533 XftFont *font;
534 int flags;
535 long unicodep;
536 } Fontcache;
537
538 /* Fontcache is an array now. A new font will be appended to the array. */
539 static Fontcache frc[16];
540 static int frclen = 0;
541
542 ssize_t
543 xwrite(int fd, const char *s, size_t len) {
544 size_t aux = len;
545
546 while(len > 0) {
547 ssize_t r = write(fd, s, len);
548 if(r < 0)
549 return r;
550 len -= r;
551 s += r;
552 }
553 return aux;
554 }
555
556 void *
557 xmalloc(size_t len) {
558 void *p = malloc(len);
559
560 if(!p)
561 die("Out of memory\n");
562
563 return p;
564 }
565
566 void *
567 xrealloc(void *p, size_t len) {
568 if((p = realloc(p, len)) == NULL)
569 die("Out of memory\n");
570
571 return p;
572 }
573
574 char *
575 xstrdup(char *s) {
576 if((s = strdup(s)) == NULL)
577 die("Out of memory\n");
578
579 return s;
580 }
581
582 size_t
583 utf8decode(char *c, long *u, size_t clen) {
584 size_t i, j, len, type;
585 long udecoded;
586
587 *u = UTF_INVALID;
588 if(!clen)
589 return 0;
590 udecoded = utf8decodebyte(c[0], &len);
591 if(!BETWEEN(len, 1, UTF_SIZ))
592 return 1;
593 for(i = 1, j = 1; i < clen && j < len; ++i, ++j) {
594 udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
595 if(type != 0)
596 return j;
597 }
598 if(j < len)
599 return 0;
600 *u = udecoded;
601 utf8validate(u, len);
602 return len;
603 }
604
605 long
606 utf8decodebyte(char c, size_t *i) {
607 for(*i = 0; *i < LEN(utfmask); ++(*i))
608 if(((uchar)c & utfmask[*i]) == utfbyte[*i])
609 return (uchar)c & ~utfmask[*i];
610 return 0;
611 }
612
613 size_t
614 utf8encode(long u, char *c, size_t clen) {
615 size_t len, i;
616
617 len = utf8validate(&u, 0);
618 if(clen < len)
619 return 0;
620 for(i = len - 1; i != 0; --i) {
621 c[i] = utf8encodebyte(u, 0);
622 u >>= 6;
623 }
624 c[0] = utf8encodebyte(u, len);
625 return len;
626 }
627
628 char
629 utf8encodebyte(long u, size_t i) {
630 return utfbyte[i] | (u & ~utfmask[i]);
631 }
632
633 size_t
634 utf8len(char *c) {
635 return utf8decode(c, &(long){0}, UTF_SIZ);
636 }
637
638 size_t
639 utf8validate(long *u, size_t i) {
640 if(!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF))
641 *u = UTF_INVALID;
642 for(i = 1; *u > utfmax[i]; ++i)
643 ;
644 return i;
645 }
646
647 void
648 selinit(void) {
649 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
650 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
651 sel.mode = 0;
652 sel.ob.x = -1;
653 sel.primary = NULL;
654 sel.clipboard = NULL;
655 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
656 if(sel.xtarget == None)
657 sel.xtarget = XA_STRING;
658 }
659
660 int
661 x2col(int x) {
662 x -= borderpx;
663 x /= xw.cw;
664
665 return LIMIT(x, 0, term.col-1);
666 }
667
668 int
669 y2row(int y) {
670 y -= borderpx;
671 y /= xw.ch;
672
673 return LIMIT(y, 0, term.row-1);
674 }
675
676 int
677 tlinelen(int y) {
678 int i = term.col;
679
680 if(term.line[y][i - 1].mode & ATTR_WRAP)
681 return i;
682
683 while(i > 0 && term.line[y][i - 1].c[0] == ' ')
684 --i;
685
686 return i;
687 }
688
689 void
690 selnormalize(void) {
691 int i;
692
693 if(sel.ob.y == sel.oe.y || sel.type == SEL_RECTANGULAR) {
694 sel.nb.x = MIN(sel.ob.x, sel.oe.x);
695 sel.ne.x = MAX(sel.ob.x, sel.oe.x);
696 } else {
697 sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
698 sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
699 }
700 sel.nb.y = MIN(sel.ob.y, sel.oe.y);
701 sel.ne.y = MAX(sel.ob.y, sel.oe.y);
702
703 selsnap(sel.snap, &sel.nb.x, &sel.nb.y, -1);
704 selsnap(sel.snap, &sel.ne.x, &sel.ne.y, +1);
705
706 /* expand selection over line breaks */
707 if (sel.type == SEL_RECTANGULAR)
708 return;
709 i = tlinelen(sel.nb.y);
710 if (i < sel.nb.x)
711 sel.nb.x = i;
712 if (tlinelen(sel.ne.y) <= sel.ne.x)
713 sel.ne.x = term.col - 1;
714 }
715
716 bool
717 selected(int x, int y) {
718 if(sel.type == SEL_RECTANGULAR)
719 return BETWEEN(y, sel.nb.y, sel.ne.y)
720 && BETWEEN(x, sel.nb.x, sel.ne.x);
721
722 return BETWEEN(y, sel.nb.y, sel.ne.y)
723 && (y != sel.nb.y || x >= sel.nb.x)
724 && (y != sel.ne.y || x <= sel.ne.x);
725 }
726
727 void
728 selsnap(int mode, int *x, int *y, int direction) {
729 int newx, newy, xt, yt;
730 bool delim, prevdelim;
731 Glyph *gp, *prevgp;
732
733 switch(mode) {
734 case SNAP_WORD:
735 /*
736 * Snap around if the word wraps around at the end or
737 * beginning of a line.
738 */
739 prevgp = &term.line[*y][*x];
740 prevdelim = strchr(worddelimiters, prevgp->c[0]) != NULL;
741 for(;;) {
742 newx = *x + direction;
743 newy = *y;
744 if(!BETWEEN(newx, 0, term.col - 1)) {
745 newy += direction;
746 newx = (newx + term.col) % term.col;
747 if (!BETWEEN(newy, 0, term.row - 1))
748 break;
749
750 if(direction > 0)
751 yt = *y, xt = *x;
752 else
753 yt = newy, xt = newx;
754 if(!(term.line[yt][xt].mode & ATTR_WRAP))
755 break;
756 }
757
758 if (newx >= tlinelen(newy))
759 break;
760
761 gp = &term.line[newy][newx];
762 delim = strchr(worddelimiters, gp->c[0]) != NULL;
763 if(!(gp->mode & ATTR_WDUMMY) && (delim != prevdelim
764 || (delim && gp->c[0] != prevgp->c[0])))
765 break;
766
767 *x = newx;
768 *y = newy;
769 prevgp = gp;
770 prevdelim = delim;
771 }
772 break;
773 case SNAP_LINE:
774 /*
775 * Snap around if the the previous line or the current one
776 * has set ATTR_WRAP at its end. Then the whole next or
777 * previous line will be selected.
778 */
779 *x = (direction < 0) ? 0 : term.col - 1;
780 if(direction < 0 && *y > 0) {
781 for(; *y > 0; *y += direction) {
782 if(!(term.line[*y-1][term.col-1].mode
783 & ATTR_WRAP)) {
784 break;
785 }
786 }
787 } else if(direction > 0 && *y < term.row-1) {
788 for(; *y < term.row; *y += direction) {
789 if(!(term.line[*y][term.col-1].mode
790 & ATTR_WRAP)) {
791 break;
792 }
793 }
794 }
795 break;
796 }
797 }
798
799 void
800 getbuttoninfo(XEvent *e) {
801 int type;
802 uint state = e->xbutton.state & ~(Button1Mask | forceselmod);
803
804 sel.alt = IS_SET(MODE_ALTSCREEN);
805
806 sel.oe.x = x2col(e->xbutton.x);
807 sel.oe.y = y2row(e->xbutton.y);
808 selnormalize();
809
810 sel.type = SEL_REGULAR;
811 for(type = 1; type < LEN(selmasks); ++type) {
812 if(match(selmasks[type], state)) {
813 sel.type = type;
814 break;
815 }
816 }
817 }
818
819 void
820 mousereport(XEvent *e) {
821 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
822 button = e->xbutton.button, state = e->xbutton.state,
823 len;
824 char buf[40];
825 static int ox, oy;
826
827 /* from urxvt */
828 if(e->xbutton.type == MotionNotify) {
829 if(x == ox && y == oy)
830 return;
831 if(!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
832 return;
833 /* MOUSE_MOTION: no reporting if no button is pressed */
834 if(IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
835 return;
836
837 button = oldbutton + 32;
838 ox = x;
839 oy = y;
840 } else {
841 if(!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
842 button = 3;
843 } else {
844 button -= Button1;
845 if(button >= 3)
846 button += 64 - 3;
847 }
848 if(e->xbutton.type == ButtonPress) {
849 oldbutton = button;
850 ox = x;
851 oy = y;
852 } else if(e->xbutton.type == ButtonRelease) {
853 oldbutton = 3;
854 /* MODE_MOUSEX10: no button release reporting */
855 if(IS_SET(MODE_MOUSEX10))
856 return;
857 if (button == 64 || button == 65)
858 return;
859 }
860 }
861
862 if(!IS_SET(MODE_MOUSEX10)) {
863 button += (state & ShiftMask ? 4 : 0)
864 + (state & Mod4Mask ? 8 : 0)
865 + (state & ControlMask ? 16 : 0);
866 }
867
868 len = 0;
869 if(IS_SET(MODE_MOUSESGR)) {
870 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
871 button, x+1, y+1,
872 e->xbutton.type == ButtonRelease ? 'm' : 'M');
873 } else if(x < 223 && y < 223) {
874 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
875 32+button, 32+x+1, 32+y+1);
876 } else {
877 return;
878 }
879
880 ttywrite(buf, len);
881 }
882
883 void
884 bpress(XEvent *e) {
885 struct timespec now;
886 Mousekey *mk;
887
888 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
889 mousereport(e);
890 return;
891 }
892
893 for(mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
894 if(e->xbutton.button == mk->b
895 && match(mk->mask, e->xbutton.state)) {
896 ttysend(mk->s, strlen(mk->s));
897 return;
898 }
899 }
900
901 if(e->xbutton.button == Button1) {
902 clock_gettime(CLOCK_MONOTONIC, &now);
903
904 /* Clear previous selection, logically and visually. */
905 selclear(NULL);
906 sel.mode = 1;
907 sel.type = SEL_REGULAR;
908 sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
909 sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
910
911 /*
912 * If the user clicks below predefined timeouts specific
913 * snapping behaviour is exposed.
914 */
915 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
916 sel.snap = SNAP_LINE;
917 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
918 sel.snap = SNAP_WORD;
919 } else {
920 sel.snap = 0;
921 }
922 selnormalize();
923
924 /*
925 * Draw selection, unless it's regular and we don't want to
926 * make clicks visible
927 */
928 if(sel.snap != 0) {
929 sel.mode++;
930 tsetdirt(sel.nb.y, sel.ne.y);
931 }
932 sel.tclick2 = sel.tclick1;
933 sel.tclick1 = now;
934 }
935 }
936
937 char *
938 getsel(void) {
939 char *str, *ptr;
940 int y, bufsize, size, lastx, linelen;
941 Glyph *gp, *last;
942
943 if(sel.ob.x == -1)
944 return NULL;
945
946 bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
947 ptr = str = xmalloc(bufsize);
948
949 /* append every set & selected glyph to the selection */
950 for(y = sel.nb.y; y <= sel.ne.y; y++) {
951 linelen = tlinelen(y);
952
953 if(sel.type == SEL_RECTANGULAR) {
954 gp = &term.line[y][sel.nb.x];
955 lastx = sel.ne.x;
956 } else {
957 gp = &term.line[y][sel.nb.y == y ? sel.nb.x : 0];
958 lastx = (sel.ne.y == y) ? sel.ne.x : term.col-1;
959 }
960 last = &term.line[y][MIN(lastx, linelen-1)];
961 while(last >= gp && last->c[0] == ' ')
962 --last;
963
964 for( ; gp <= last; ++gp) {
965 if(gp->mode & ATTR_WDUMMY)
966 continue;
967
968 size = utf8len(gp->c);
969 memcpy(ptr, gp->c, size);
970 ptr += size;
971 }
972
973 /*
974 * Copy and pasting of line endings is inconsistent
975 * in the inconsistent terminal and GUI world.
976 * The best solution seems like to produce '\n' when
977 * something is copied from st and convert '\n' to
978 * '\r', when something to be pasted is received by
979 * st.
980 * FIXME: Fix the computer world.
981 */
982 if((y < sel.ne.y || lastx >= linelen) && !(last->mode & ATTR_WRAP))
983 *ptr++ = '\n';
984 }
985 *ptr = 0;
986 return str;
987 }
988
989 void
990 selcopy(Time t) {
991 xsetsel(getsel(), t);
992 }
993
994 void
995 selnotify(XEvent *e) {
996 ulong nitems, ofs, rem;
997 int format;
998 uchar *data, *last, *repl;
999 Atom type;
1000 XSelectionEvent *xsev;
1001
1002 ofs = 0;
1003 xsev = &e->xselection;
1004 if (xsev->property == None)
1005 return;
1006 do {
1007 if(XGetWindowProperty(xw.dpy, xw.win, xsev->property, ofs,
1008 BUFSIZ/4, False, AnyPropertyType,
1009 &type, &format, &nitems, &rem,
1010 &data)) {
1011 fprintf(stderr, "Clipboard allocation failed\n");
1012 return;
1013 }
1014
1015 /*
1016 * As seen in getsel:
1017 * Line endings are inconsistent in the terminal and GUI world
1018 * copy and pasting. When receiving some selection data,
1019 * replace all '\n' with '\r'.
1020 * FIXME: Fix the computer world.
1021 */
1022 repl = data;
1023 last = data + nitems * format / 8;
1024 while((repl = memchr(repl, '\n', last - repl))) {
1025 *repl++ = '\r';
1026 }
1027
1028 if(IS_SET(MODE_BRCKTPASTE))
1029 ttywrite("\033[200~", 6);
1030 ttysend((char *)data, nitems * format / 8);
1031 if(IS_SET(MODE_BRCKTPASTE))
1032 ttywrite("\033[201~", 6);
1033 XFree(data);
1034 /* number of 32-bit chunks returned */
1035 ofs += nitems * format / 32;
1036 } while(rem > 0);
1037 }
1038
1039 void
1040 selpaste(const Arg *dummy) {
1041 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
1042 xw.win, CurrentTime);
1043 }
1044
1045 void
1046 clipcopy(const Arg *dummy) {
1047 Atom clipboard;
1048
1049 if(sel.clipboard != NULL)
1050 free(sel.clipboard);
1051
1052 if(sel.primary != NULL) {
1053 sel.clipboard = xstrdup(sel.primary);
1054 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1055 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
1056 }
1057 }
1058
1059 void
1060 clippaste(const Arg *dummy) {
1061 Atom clipboard;
1062
1063 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1064 XConvertSelection(xw.dpy, clipboard, sel.xtarget, clipboard,
1065 xw.win, CurrentTime);
1066 }
1067
1068 void
1069 selclear(XEvent *e) {
1070 if(sel.ob.x == -1)
1071 return;
1072 sel.ob.x = -1;
1073 tsetdirt(sel.nb.y, sel.ne.y);
1074 }
1075
1076 void
1077 selrequest(XEvent *e) {
1078 XSelectionRequestEvent *xsre;
1079 XSelectionEvent xev;
1080 Atom xa_targets, string, clipboard;
1081 char *seltext;
1082
1083 xsre = (XSelectionRequestEvent *) e;
1084 xev.type = SelectionNotify;
1085 xev.requestor = xsre->requestor;
1086 xev.selection = xsre->selection;
1087 xev.target = xsre->target;
1088 xev.time = xsre->time;
1089 if (xsre->property == None)
1090 xsre->property = xsre->target;
1091
1092 /* reject */
1093 xev.property = None;
1094
1095 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
1096 if(xsre->target == xa_targets) {
1097 /* respond with the supported type */
1098 string = sel.xtarget;
1099 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1100 XA_ATOM, 32, PropModeReplace,
1101 (uchar *) &string, 1);
1102 xev.property = xsre->property;
1103 } else if(xsre->target == sel.xtarget || xsre->target == XA_STRING) {
1104 /*
1105 * xith XA_STRING non ascii characters may be incorrect in the
1106 * requestor. It is not our problem, use utf8.
1107 */
1108 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1109 if(xsre->selection == XA_PRIMARY) {
1110 seltext = sel.primary;
1111 } else if(xsre->selection == clipboard) {
1112 seltext = sel.clipboard;
1113 } else {
1114 fprintf(stderr,
1115 "Unhandled clipboard selection 0x%lx\n",
1116 xsre->selection);
1117 return;
1118 }
1119 if(seltext != NULL) {
1120 XChangeProperty(xsre->display, xsre->requestor,
1121 xsre->property, xsre->target,
1122 8, PropModeReplace,
1123 (uchar *)seltext, strlen(seltext));
1124 xev.property = xsre->property;
1125 }
1126 }
1127
1128 /* all done, send a notification to the listener */
1129 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
1130 fprintf(stderr, "Error sending SelectionNotify event\n");
1131 }
1132
1133 void
1134 xsetsel(char *str, Time t) {
1135 free(sel.primary);
1136 sel.primary = str;
1137
1138 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, t);
1139 if (XGetSelectionOwner(xw.dpy, XA_PRIMARY) != xw.win)
1140 selclear(0);
1141 }
1142
1143 void
1144 brelease(XEvent *e) {
1145 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1146 mousereport(e);
1147 return;
1148 }
1149
1150 if(e->xbutton.button == Button2) {
1151 selpaste(NULL);
1152 } else if(e->xbutton.button == Button1) {
1153 if(sel.mode < 2) {
1154 selclear(NULL);
1155 } else {
1156 getbuttoninfo(e);
1157 selcopy(e->xbutton.time);
1158 }
1159 sel.mode = 0;
1160 tsetdirt(sel.nb.y, sel.ne.y);
1161 }
1162 }
1163
1164 void
1165 bmotion(XEvent *e) {
1166 int oldey, oldex, oldsby, oldsey;
1167
1168 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1169 mousereport(e);
1170 return;
1171 }
1172
1173 if(!sel.mode)
1174 return;
1175
1176 sel.mode++;
1177 oldey = sel.oe.y;
1178 oldex = sel.oe.x;
1179 oldsby = sel.nb.y;
1180 oldsey = sel.ne.y;
1181 getbuttoninfo(e);
1182
1183 if(oldey != sel.oe.y || oldex != sel.oe.x)
1184 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
1185 }
1186
1187 void
1188 die(const char *errstr, ...) {
1189 va_list ap;
1190
1191 va_start(ap, errstr);
1192 vfprintf(stderr, errstr, ap);
1193 va_end(ap);
1194 exit(EXIT_FAILURE);
1195 }
1196
1197 void
1198 execsh(void) {
1199 char **args, *sh, *prog;
1200 const struct passwd *pw;
1201 char buf[sizeof(long) * 8 + 1];
1202
1203 errno = 0;
1204 if((pw = getpwuid(getuid())) == NULL) {
1205 if(errno)
1206 die("getpwuid:%s\n", strerror(errno));
1207 else
1208 die("who are you?\n");
1209 }
1210
1211 if (!(sh = getenv("SHELL"))) {
1212 sh = (pw->pw_shell[0]) ? pw->pw_shell : shell;
1213 }
1214
1215 if(opt_cmd)
1216 prog = opt_cmd[0];
1217 else if(utmp)
1218 prog = utmp;
1219 else
1220 prog = sh;
1221 args = (opt_cmd) ? opt_cmd : (char *[]) {prog, NULL};
1222
1223 snprintf(buf, sizeof(buf), "%lu", xw.win);
1224
1225 unsetenv("COLUMNS");
1226 unsetenv("LINES");
1227 unsetenv("TERMCAP");
1228 setenv("LOGNAME", pw->pw_name, 1);
1229 setenv("USER", pw->pw_name, 1);
1230 setenv("SHELL", sh, 1);
1231 setenv("HOME", pw->pw_dir, 1);
1232 setenv("TERM", termname, 1);
1233 setenv("WINDOWID", buf, 1);
1234
1235 signal(SIGCHLD, SIG_DFL);
1236 signal(SIGHUP, SIG_DFL);
1237 signal(SIGINT, SIG_DFL);
1238 signal(SIGQUIT, SIG_DFL);
1239 signal(SIGTERM, SIG_DFL);
1240 signal(SIGALRM, SIG_DFL);
1241
1242 execvp(prog, args);
1243 _exit(EXIT_FAILURE);
1244 }
1245
1246 void
1247 sigchld(int a) {
1248 int stat, ret;
1249
1250 if(waitpid(pid, &stat, 0) < 0)
1251 die("Waiting for pid %hd failed: %s\n", pid, strerror(errno));
1252
1253 ret = WIFEXITED(stat) ? WEXITSTATUS(stat) : EXIT_FAILURE;
1254 if (ret != EXIT_SUCCESS)
1255 die("child finished with error '%d'\n", stat);
1256 exit(EXIT_SUCCESS);
1257 }
1258
1259
1260 void
1261 stty(void)
1262 {
1263 char cmd[_POSIX_ARG_MAX], **p, *q, *s;
1264 size_t n, siz;
1265
1266 if((n = strlen(stty_args)) > sizeof(cmd)-1)
1267 die("incorrect stty parameters\n");
1268 memcpy(cmd, stty_args, n);
1269 q = cmd + n;
1270 siz = sizeof(cmd) - n;
1271 for(p = opt_cmd; p && (s = *p); ++p) {
1272 if((n = strlen(s)) > siz-1)
1273 die("stty parameter length too long\n");
1274 *q++ = ' ';
1275 q = memcpy(q, s, n);
1276 q += n;
1277 siz-= n + 1;
1278 }
1279 *q = '\0';
1280 system(cmd);
1281 }
1282
1283 void
1284 ttynew(void) {
1285 int m, s;
1286 struct winsize w = {term.row, term.col, 0, 0};
1287
1288 if(opt_io) {
1289 term.mode |= MODE_PRINT;
1290 iofd = (!strcmp(opt_io, "-")) ?
1291 STDOUT_FILENO :
1292 open(opt_io, O_WRONLY | O_CREAT, 0666);
1293 if(iofd < 0) {
1294 fprintf(stderr, "Error opening %s:%s\n",
1295 opt_io, strerror(errno));
1296 }
1297 }
1298
1299 if (opt_line) {
1300 if((cmdfd = open(opt_line, O_RDWR)) < 0)
1301 die("open line failed: %s\n", strerror(errno));
1302 close(STDIN_FILENO);
1303 dup(cmdfd);
1304 stty();
1305 return;
1306 }
1307
1308 /* seems to work fine on linux, openbsd and freebsd */
1309 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1310 die("openpty failed: %s\n", strerror(errno));
1311
1312 switch(pid = fork()) {
1313 case -1:
1314 die("fork failed\n");
1315 break;
1316 case 0:
1317 close(iofd);
1318 setsid(); /* create a new process group */
1319 dup2(s, STDIN_FILENO);
1320 dup2(s, STDOUT_FILENO);
1321 dup2(s, STDERR_FILENO);
1322 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1323 die("ioctl TIOCSCTTY failed: %s\n", strerror(errno));
1324 close(s);
1325 close(m);
1326 execsh();
1327 break;
1328 default:
1329 close(s);
1330 cmdfd = m;
1331 signal(SIGCHLD, sigchld);
1332 break;
1333 }
1334 }
1335
1336 void
1337 ttyread(void) {
1338 static char buf[BUFSIZ];
1339 static int buflen = 0;
1340 char *ptr;
1341 char s[UTF_SIZ];
1342 int charsize; /* size of utf8 char in bytes */
1343 long unicodep;
1344 int ret;
1345
1346 /* append read bytes to unprocessed bytes */
1347 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1348 die("Couldn't read from shell: %s\n", strerror(errno));
1349
1350 /* process every complete utf8 char */
1351 buflen += ret;
1352 ptr = buf;
1353 while((charsize = utf8decode(ptr, &unicodep, buflen))) {
1354 utf8encode(unicodep, s, UTF_SIZ);
1355 tputc(s, charsize);
1356 ptr += charsize;
1357 buflen -= charsize;
1358 }
1359
1360 /* keep any uncomplete utf8 char for the next call */
1361 memmove(buf, ptr, buflen);
1362 }
1363
1364 void
1365 ttywrite(const char *s, size_t n) {
1366 if(xwrite(cmdfd, s, n) == -1)
1367 die("write error on tty: %s\n", strerror(errno));
1368 }
1369
1370 void
1371 ttysend(char *s, size_t n) {
1372 ttywrite(s, n);
1373 if(IS_SET(MODE_ECHO))
1374 techo(s, n);
1375 }
1376
1377 void
1378 ttyresize(void) {
1379 struct winsize w;
1380
1381 w.ws_row = term.row;
1382 w.ws_col = term.col;
1383 w.ws_xpixel = xw.tw;
1384 w.ws_ypixel = xw.th;
1385 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1386 fprintf(stderr, "Couldn't set window size: %s\n", strerror(errno));
1387 }
1388
1389 int
1390 tattrset(int attr) {
1391 int i, j;
1392
1393 for(i = 0; i < term.row-1; i++) {
1394 for(j = 0; j < term.col-1; j++) {
1395 if(term.line[i][j].mode & attr)
1396 return 1;
1397 }
1398 }
1399
1400 return 0;
1401 }
1402
1403 void
1404 tsetdirt(int top, int bot) {
1405 int i;
1406
1407 LIMIT(top, 0, term.row-1);
1408 LIMIT(bot, 0, term.row-1);
1409
1410 for(i = top; i <= bot; i++)
1411 term.dirty[i] = 1;
1412 }
1413
1414 void
1415 tsetdirtattr(int attr) {
1416 int i, j;
1417
1418 for(i = 0; i < term.row-1; i++) {
1419 for(j = 0; j < term.col-1; j++) {
1420 if(term.line[i][j].mode & attr) {
1421 tsetdirt(i, i);
1422 break;
1423 }
1424 }
1425 }
1426 }
1427
1428 void
1429 tfulldirt(void) {
1430 tsetdirt(0, term.row-1);
1431 }
1432
1433 void
1434 tcursor(int mode) {
1435 static TCursor c[2];
1436 bool alt = IS_SET(MODE_ALTSCREEN);
1437
1438 if(mode == CURSOR_SAVE) {
1439 c[alt] = term.c;
1440 } else if(mode == CURSOR_LOAD) {
1441 term.c = c[alt];
1442 tmoveto(c[alt].x, c[alt].y);
1443 }
1444 }
1445
1446 void
1447 treset(void) {
1448 uint i;
1449
1450 term.c = (TCursor){{
1451 .mode = ATTR_NULL,
1452 .fg = defaultfg,
1453 .bg = defaultbg
1454 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1455
1456 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1457 for(i = tabspaces; i < term.col; i += tabspaces)
1458 term.tabs[i] = 1;
1459 term.top = 0;
1460 term.bot = term.row - 1;
1461 term.mode = MODE_WRAP;
1462 memset(term.trantbl, sizeof(term.trantbl), CS_USA);
1463 term.charset = 0;
1464
1465 for(i = 0; i < 2; i++) {
1466 tmoveto(0, 0);
1467 tcursor(CURSOR_SAVE);
1468 tclearregion(0, 0, term.col-1, term.row-1);
1469 tswapscreen();
1470 }
1471 }
1472
1473 void
1474 tnew(int col, int row) {
1475 term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } };
1476 tresize(col, row);
1477 term.numlock = 1;
1478
1479 treset();
1480 }
1481
1482 void
1483 tswapscreen(void) {
1484 Line *tmp = term.line;
1485
1486 term.line = term.alt;
1487 term.alt = tmp;
1488 term.mode ^= MODE_ALTSCREEN;
1489 tfulldirt();
1490 }
1491
1492 void
1493 tscrolldown(int orig, int n) {
1494 int i;
1495 Line temp;
1496
1497 LIMIT(n, 0, term.bot-orig+1);
1498
1499 tsetdirt(orig, term.bot-n);
1500 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1501
1502 for(i = term.bot; i >= orig+n; i--) {
1503 temp = term.line[i];
1504 term.line[i] = term.line[i-n];
1505 term.line[i-n] = temp;
1506 }
1507
1508 selscroll(orig, n);
1509 }
1510
1511 void
1512 tscrollup(int orig, int n) {
1513 int i;
1514 Line temp;
1515
1516 LIMIT(n, 0, term.bot-orig+1);
1517
1518 tclearregion(0, orig, term.col-1, orig+n-1);
1519 tsetdirt(orig+n, term.bot);
1520
1521 for(i = orig; i <= term.bot-n; i++) {
1522 temp = term.line[i];
1523 term.line[i] = term.line[i+n];
1524 term.line[i+n] = temp;
1525 }
1526
1527 selscroll(orig, -n);
1528 }
1529
1530 void
1531 selscroll(int orig, int n) {
1532 if(sel.ob.x == -1)
1533 return;
1534
1535 if(BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
1536 if((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
1537 selclear(NULL);
1538 return;
1539 }
1540 if(sel.type == SEL_RECTANGULAR) {
1541 if(sel.ob.y < term.top)
1542 sel.ob.y = term.top;
1543 if(sel.oe.y > term.bot)
1544 sel.oe.y = term.bot;
1545 } else {
1546 if(sel.ob.y < term.top) {
1547 sel.ob.y = term.top;
1548 sel.ob.x = 0;
1549 }
1550 if(sel.oe.y > term.bot) {
1551 sel.oe.y = term.bot;
1552 sel.oe.x = term.col;
1553 }
1554 }
1555 selnormalize();
1556 }
1557 }
1558
1559 void
1560 tnewline(int first_col) {
1561 int y = term.c.y;
1562
1563 if(y == term.bot) {
1564 tscrollup(term.top, 1);
1565 } else {
1566 y++;
1567 }
1568 tmoveto(first_col ? 0 : term.c.x, y);
1569 }
1570
1571 void
1572 csiparse(void) {
1573 char *p = csiescseq.buf, *np;
1574 long int v;
1575
1576 csiescseq.narg = 0;
1577 if(*p == '?') {
1578 csiescseq.priv = 1;
1579 p++;
1580 }
1581
1582 csiescseq.buf[csiescseq.len] = '\0';
1583 while(p < csiescseq.buf+csiescseq.len) {
1584 np = NULL;
1585 v = strtol(p, &np, 10);
1586 if(np == p)
1587 v = 0;
1588 if(v == LONG_MAX || v == LONG_MIN)
1589 v = -1;
1590 csiescseq.arg[csiescseq.narg++] = v;
1591 p = np;
1592 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1593 break;
1594 p++;
1595 }
1596 csiescseq.mode[0] = *p++;
1597 csiescseq.mode[1] = (p < csiescseq.buf+csiescseq.len) ? *p : '\0';
1598 }
1599
1600 /* for absolute user moves, when decom is set */
1601 void
1602 tmoveato(int x, int y) {
1603 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1604 }
1605
1606 void
1607 tmoveto(int x, int y) {
1608 int miny, maxy;
1609
1610 if(term.c.state & CURSOR_ORIGIN) {
1611 miny = term.top;
1612 maxy = term.bot;
1613 } else {
1614 miny = 0;
1615 maxy = term.row - 1;
1616 }
1617 term.c.state &= ~CURSOR_WRAPNEXT;
1618 term.c.x = LIMIT(x, 0, term.col-1);
1619 term.c.y = LIMIT(y, miny, maxy);
1620 }
1621
1622 void
1623 tsetchar(char *c, Glyph *attr, int x, int y) {
1624 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1625 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1626 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1627 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1628 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1629 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1630 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1631 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1632 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1633 };
1634
1635 /*
1636 * The table is proudly stolen from rxvt.
1637 */
1638 if(term.trantbl[term.charset] == CS_GRAPHIC0) {
1639 if(BETWEEN(c[0], 0x41, 0x7e) && vt100_0[c[0] - 0x41]) {
1640 c = vt100_0[c[0] - 0x41];
1641 }
1642 }
1643
1644 if(term.line[y][x].mode & ATTR_WIDE) {
1645 if(x+1 < term.col) {
1646 term.line[y][x+1].c[0] = ' ';
1647 term.line[y][x+1].mode &= ~ATTR_WDUMMY;
1648 }
1649 } else if(term.line[y][x].mode & ATTR_WDUMMY) {
1650 term.line[y][x-1].c[0] = ' ';
1651 term.line[y][x-1].mode &= ~ATTR_WIDE;
1652 }
1653
1654 term.dirty[y] = 1;
1655 term.line[y][x] = *attr;
1656 memcpy(term.line[y][x].c, c, UTF_SIZ);
1657 }
1658
1659 void
1660 tclearregion(int x1, int y1, int x2, int y2) {
1661 int x, y, temp;
1662 Glyph *gp;
1663
1664 if(x1 > x2)
1665 temp = x1, x1 = x2, x2 = temp;
1666 if(y1 > y2)
1667 temp = y1, y1 = y2, y2 = temp;
1668
1669 LIMIT(x1, 0, term.col-1);
1670 LIMIT(x2, 0, term.col-1);
1671 LIMIT(y1, 0, term.row-1);
1672 LIMIT(y2, 0, term.row-1);
1673
1674 for(y = y1; y <= y2; y++) {
1675 term.dirty[y] = 1;
1676 for(x = x1; x <= x2; x++) {
1677 gp = &term.line[y][x];
1678 if(selected(x, y))
1679 selclear(NULL);
1680 gp->fg = term.c.attr.fg;
1681 gp->bg = term.c.attr.bg;
1682 gp->mode = 0;
1683 memcpy(gp->c, " ", 2);
1684 }
1685 }
1686 }
1687
1688 void
1689 tdeletechar(int n) {
1690 int dst, src, size;
1691 Glyph *line;
1692
1693 LIMIT(n, 0, term.col - term.c.x);
1694
1695 dst = term.c.x;
1696 src = term.c.x + n;
1697 size = term.col - src;
1698 line = term.line[term.c.y];
1699
1700 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1701 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1702 }
1703
1704 void
1705 tinsertblank(int n) {
1706 int dst, src, size;
1707 Glyph *line;
1708
1709 LIMIT(n, 0, term.col - term.c.x);
1710
1711 dst = term.c.x + n;
1712 src = term.c.x;
1713 size = term.col - dst;
1714 line = term.line[term.c.y];
1715
1716 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1717 tclearregion(src, term.c.y, dst - 1, term.c.y);
1718 }
1719
1720 void
1721 tinsertblankline(int n) {
1722 if(BETWEEN(term.c.y, term.top, term.bot))
1723 tscrolldown(term.c.y, n);
1724 }
1725
1726 void
1727 tdeleteline(int n) {
1728 if(BETWEEN(term.c.y, term.top, term.bot))
1729 tscrollup(term.c.y, n);
1730 }
1731
1732 int32_t
1733 tdefcolor(int *attr, int *npar, int l) {
1734 int32_t idx = -1;
1735 uint r, g, b;
1736
1737 switch (attr[*npar + 1]) {
1738 case 2: /* direct color in RGB space */
1739 if (*npar + 4 >= l) {
1740 fprintf(stderr,
1741 "erresc(38): Incorrect number of parameters (%d)\n",
1742 *npar);
1743 break;
1744 }
1745 r = attr[*npar + 2];
1746 g = attr[*npar + 3];
1747 b = attr[*npar + 4];
1748 *npar += 4;
1749 if(!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
1750 fprintf(stderr, "erresc: bad rgb color (%d,%d,%d)\n",
1751 r, g, b);
1752 else
1753 idx = TRUECOLOR(r, g, b);
1754 break;
1755 case 5: /* indexed color */
1756 if (*npar + 2 >= l) {
1757 fprintf(stderr,
1758 "erresc(38): Incorrect number of parameters (%d)\n",
1759 *npar);
1760 break;
1761 }
1762 *npar += 2;
1763 if(!BETWEEN(attr[*npar], 0, 255))
1764 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
1765 else
1766 idx = attr[*npar];
1767 break;
1768 case 0: /* implemented defined (only foreground) */
1769 case 1: /* transparent */
1770 case 3: /* direct color in CMY space */
1771 case 4: /* direct color in CMYK space */
1772 default:
1773 fprintf(stderr,
1774 "erresc(38): gfx attr %d unknown\n", attr[*npar]);
1775 break;
1776 }
1777
1778 return idx;
1779 }
1780
1781 void
1782 tsetattr(int *attr, int l) {
1783 int i;
1784 int32_t idx;
1785
1786 for(i = 0; i < l; i++) {
1787 switch(attr[i]) {
1788 case 0:
1789 term.c.attr.mode &= ~(
1790 ATTR_BOLD |
1791 ATTR_FAINT |
1792 ATTR_ITALIC |
1793 ATTR_UNDERLINE |
1794 ATTR_BLINK |
1795 ATTR_REVERSE |
1796 ATTR_INVISIBLE |
1797 ATTR_STRUCK );
1798 term.c.attr.fg = defaultfg;
1799 term.c.attr.bg = defaultbg;
1800 break;
1801 case 1:
1802 term.c.attr.mode |= ATTR_BOLD;
1803 break;
1804 case 2:
1805 term.c.attr.mode |= ATTR_FAINT;
1806 break;
1807 case 3:
1808 term.c.attr.mode |= ATTR_ITALIC;
1809 break;
1810 case 4:
1811 term.c.attr.mode |= ATTR_UNDERLINE;
1812 break;
1813 case 5: /* slow blink */
1814 /* FALLTHROUGH */
1815 case 6: /* rapid blink */
1816 term.c.attr.mode |= ATTR_BLINK;
1817 break;
1818 case 7:
1819 term.c.attr.mode |= ATTR_REVERSE;
1820 break;
1821 case 8:
1822 term.c.attr.mode |= ATTR_INVISIBLE;
1823 break;
1824 case 9:
1825 term.c.attr.mode |= ATTR_STRUCK;
1826 break;
1827 case 22:
1828 term.c.attr.mode &= ~(ATTR_BOLD | ATTR_FAINT);
1829 break;
1830 case 23:
1831 term.c.attr.mode &= ~ATTR_ITALIC;
1832 break;
1833 case 24:
1834 term.c.attr.mode &= ~ATTR_UNDERLINE;
1835 break;
1836 case 25:
1837 term.c.attr.mode &= ~ATTR_BLINK;
1838 break;
1839 case 27:
1840 term.c.attr.mode &= ~ATTR_REVERSE;
1841 break;
1842 case 28:
1843 term.c.attr.mode &= ~ATTR_INVISIBLE;
1844 break;
1845 case 29:
1846 term.c.attr.mode &= ~ATTR_STRUCK;
1847 break;
1848 case 38:
1849 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1850 term.c.attr.fg = idx;
1851 break;
1852 case 39:
1853 term.c.attr.fg = defaultfg;
1854 break;
1855 case 48:
1856 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1857 term.c.attr.bg = idx;
1858 break;
1859 case 49:
1860 term.c.attr.bg = defaultbg;
1861 break;
1862 default:
1863 if(BETWEEN(attr[i], 30, 37)) {
1864 term.c.attr.fg = attr[i] - 30;
1865 } else if(BETWEEN(attr[i], 40, 47)) {
1866 term.c.attr.bg = attr[i] - 40;
1867 } else if(BETWEEN(attr[i], 90, 97)) {
1868 term.c.attr.fg = attr[i] - 90 + 8;
1869 } else if(BETWEEN(attr[i], 100, 107)) {
1870 term.c.attr.bg = attr[i] - 100 + 8;
1871 } else {
1872 fprintf(stderr,
1873 "erresc(default): gfx attr %d unknown\n",
1874 attr[i]), csidump();
1875 }
1876 break;
1877 }
1878 }
1879 }
1880
1881 void
1882 tsetscroll(int t, int b) {
1883 int temp;
1884
1885 LIMIT(t, 0, term.row-1);
1886 LIMIT(b, 0, term.row-1);
1887 if(t > b) {
1888 temp = t;
1889 t = b;
1890 b = temp;
1891 }
1892 term.top = t;
1893 term.bot = b;
1894 }
1895
1896 void
1897 tsetmode(bool priv, bool set, int *args, int narg) {
1898 int *lim, mode;
1899 bool alt;
1900
1901 for(lim = args + narg; args < lim; ++args) {
1902 if(priv) {
1903 switch(*args) {
1904 case 1: /* DECCKM -- Cursor key */
1905 MODBIT(term.mode, set, MODE_APPCURSOR);
1906 break;
1907 case 5: /* DECSCNM -- Reverse video */
1908 mode = term.mode;
1909 MODBIT(term.mode, set, MODE_REVERSE);
1910 if(mode != term.mode)
1911 redraw();
1912 break;
1913 case 6: /* DECOM -- Origin */
1914 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1915 tmoveato(0, 0);
1916 break;
1917 case 7: /* DECAWM -- Auto wrap */
1918 MODBIT(term.mode, set, MODE_WRAP);
1919 break;
1920 case 0: /* Error (IGNORED) */
1921 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1922 case 3: /* DECCOLM -- Column (IGNORED) */
1923 case 4: /* DECSCLM -- Scroll (IGNORED) */
1924 case 8: /* DECARM -- Auto repeat (IGNORED) */
1925 case 18: /* DECPFF -- Printer feed (IGNORED) */
1926 case 19: /* DECPEX -- Printer extent (IGNORED) */
1927 case 42: /* DECNRCM -- National characters (IGNORED) */
1928 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1929 break;
1930 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1931 MODBIT(term.mode, !set, MODE_HIDE);
1932 break;
1933 case 9: /* X10 mouse compatibility mode */
1934 xsetpointermotion(0);
1935 MODBIT(term.mode, 0, MODE_MOUSE);
1936 MODBIT(term.mode, set, MODE_MOUSEX10);
1937 break;
1938 case 1000: /* 1000: report button press */
1939 xsetpointermotion(0);
1940 MODBIT(term.mode, 0, MODE_MOUSE);
1941 MODBIT(term.mode, set, MODE_MOUSEBTN);
1942 break;
1943 case 1002: /* 1002: report motion on button press */
1944 xsetpointermotion(0);
1945 MODBIT(term.mode, 0, MODE_MOUSE);
1946 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1947 break;
1948 case 1003: /* 1003: enable all mouse motions */
1949 xsetpointermotion(set);
1950 MODBIT(term.mode, 0, MODE_MOUSE);
1951 MODBIT(term.mode, set, MODE_MOUSEMANY);
1952 break;
1953 case 1004: /* 1004: send focus events to tty */
1954 MODBIT(term.mode, set, MODE_FOCUS);
1955 break;
1956 case 1006: /* 1006: extended reporting mode */
1957 MODBIT(term.mode, set, MODE_MOUSESGR);
1958 break;
1959 case 1034:
1960 MODBIT(term.mode, set, MODE_8BIT);
1961 break;
1962 case 1049: /* swap screen & set/restore cursor as xterm */
1963 if (!allowaltscreen)
1964 break;
1965 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1966 /* FALLTHROUGH */
1967 case 47: /* swap screen */
1968 case 1047:
1969 if (!allowaltscreen)
1970 break;
1971 alt = IS_SET(MODE_ALTSCREEN);
1972 if(alt) {
1973 tclearregion(0, 0, term.col-1,
1974 term.row-1);
1975 }
1976 if(set ^ alt) /* set is always 1 or 0 */
1977 tswapscreen();
1978 if(*args != 1049)
1979 break;
1980 /* FALLTHROUGH */
1981 case 1048:
1982 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1983 break;
1984 case 2004: /* 2004: bracketed paste mode */
1985 MODBIT(term.mode, set, MODE_BRCKTPASTE);
1986 break;
1987 /* Not implemented mouse modes. See comments there. */
1988 case 1001: /* mouse highlight mode; can hang the
1989 terminal by design when implemented. */
1990 case 1005: /* UTF-8 mouse mode; will confuse
1991 applications not supporting UTF-8
1992 and luit. */
1993 case 1015: /* urxvt mangled mouse mode; incompatible
1994 and can be mistaken for other control
1995 codes. */
1996 default:
1997 fprintf(stderr,
1998 "erresc: unknown private set/reset mode %d\n",
1999 *args);
2000 break;
2001 }
2002 } else {
2003 switch(*args) {
2004 case 0: /* Error (IGNORED) */
2005 break;
2006 case 2: /* KAM -- keyboard action */
2007 MODBIT(term.mode, set, MODE_KBDLOCK);
2008 break;
2009 case 4: /* IRM -- Insertion-replacement */
2010 MODBIT(term.mode, set, MODE_INSERT);
2011 break;
2012 case 12: /* SRM -- Send/Receive */
2013 MODBIT(term.mode, !set, MODE_ECHO);
2014 break;
2015 case 20: /* LNM -- Linefeed/new line */
2016 MODBIT(term.mode, set, MODE_CRLF);
2017 break;
2018 default:
2019 fprintf(stderr,
2020 "erresc: unknown set/reset mode %d\n",
2021 *args);
2022 break;
2023 }
2024 }
2025 }
2026 }
2027
2028 void
2029 csihandle(void) {
2030 char buf[40];
2031 int len;
2032
2033 switch(csiescseq.mode[0]) {
2034 default:
2035 unknown:
2036 fprintf(stderr, "erresc: unknown csi ");
2037 csidump();
2038 /* die(""); */
2039 break;
2040 case '@': /* ICH -- Insert <n> blank char */
2041 DEFAULT(csiescseq.arg[0], 1);
2042 tinsertblank(csiescseq.arg[0]);
2043 break;
2044 case 'A': /* CUU -- Cursor <n> Up */
2045 DEFAULT(csiescseq.arg[0], 1);
2046 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
2047 break;
2048 case 'B': /* CUD -- Cursor <n> Down */
2049 case 'e': /* VPR --Cursor <n> Down */
2050 DEFAULT(csiescseq.arg[0], 1);
2051 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
2052 break;
2053 case 'i': /* MC -- Media Copy */
2054 switch(csiescseq.arg[0]) {
2055 case 0:
2056 tdump();
2057 break;
2058 case 1:
2059 tdumpline(term.c.y);
2060 break;
2061 case 2:
2062 tdumpsel();
2063 break;
2064 case 4:
2065 term.mode &= ~MODE_PRINT;
2066 break;
2067 case 5:
2068 term.mode |= MODE_PRINT;
2069 break;
2070 }
2071 break;
2072 case 'c': /* DA -- Device Attributes */
2073 if(csiescseq.arg[0] == 0)
2074 ttywrite(vtiden, sizeof(vtiden) - 1);
2075 break;
2076 case 'C': /* CUF -- Cursor <n> Forward */
2077 case 'a': /* HPR -- Cursor <n> Forward */
2078 DEFAULT(csiescseq.arg[0], 1);
2079 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
2080 break;
2081 case 'D': /* CUB -- Cursor <n> Backward */
2082 DEFAULT(csiescseq.arg[0], 1);
2083 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
2084 break;
2085 case 'E': /* CNL -- Cursor <n> Down and first col */
2086 DEFAULT(csiescseq.arg[0], 1);
2087 tmoveto(0, term.c.y+csiescseq.arg[0]);
2088 break;
2089 case 'F': /* CPL -- Cursor <n> Up and first col */
2090 DEFAULT(csiescseq.arg[0], 1);
2091 tmoveto(0, term.c.y-csiescseq.arg[0]);
2092 break;
2093 case 'g': /* TBC -- Tabulation clear */
2094 switch(csiescseq.arg[0]) {
2095 case 0: /* clear current tab stop */
2096 term.tabs[term.c.x] = 0;
2097 break;
2098 case 3: /* clear all the tabs */
2099 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
2100 break;
2101 default:
2102 goto unknown;
2103 }
2104 break;
2105 case 'G': /* CHA -- Move to <col> */
2106 case '`': /* HPA */
2107 DEFAULT(csiescseq.arg[0], 1);
2108 tmoveto(csiescseq.arg[0]-1, term.c.y);
2109 break;
2110 case 'H': /* CUP -- Move to <row> <col> */
2111 case 'f': /* HVP */
2112 DEFAULT(csiescseq.arg[0], 1);
2113 DEFAULT(csiescseq.arg[1], 1);
2114 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
2115 break;
2116 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
2117 DEFAULT(csiescseq.arg[0], 1);
2118 tputtab(csiescseq.arg[0]);
2119 break;
2120 case 'J': /* ED -- Clear screen */
2121 selclear(NULL);
2122 switch(csiescseq.arg[0]) {
2123 case 0: /* below */
2124 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
2125 if(term.c.y < term.row-1) {
2126 tclearregion(0, term.c.y+1, term.col-1,
2127 term.row-1);
2128 }
2129 break;
2130 case 1: /* above */
2131 if(term.c.y > 1)
2132 tclearregion(0, 0, term.col-1, term.c.y-1);
2133 tclearregion(0, term.c.y, term.c.x, term.c.y);
2134 break;
2135 case 2: /* all */
2136 tclearregion(0, 0, term.col-1, term.row-1);
2137 break;
2138 default:
2139 goto unknown;
2140 }
2141 break;
2142 case 'K': /* EL -- Clear line */
2143 switch(csiescseq.arg[0]) {
2144 case 0: /* right */
2145 tclearregion(term.c.x, term.c.y, term.col-1,
2146 term.c.y);
2147 break;
2148 case 1: /* left */
2149 tclearregion(0, term.c.y, term.c.x, term.c.y);
2150 break;
2151 case 2: /* all */
2152 tclearregion(0, term.c.y, term.col-1, term.c.y);
2153 break;
2154 }
2155 break;
2156 case 'S': /* SU -- Scroll <n> line up */
2157 DEFAULT(csiescseq.arg[0], 1);
2158 tscrollup(term.top, csiescseq.arg[0]);
2159 break;
2160 case 'T': /* SD -- Scroll <n> line down */
2161 DEFAULT(csiescseq.arg[0], 1);
2162 tscrolldown(term.top, csiescseq.arg[0]);
2163 break;
2164 case 'L': /* IL -- Insert <n> blank lines */
2165 DEFAULT(csiescseq.arg[0], 1);
2166 tinsertblankline(csiescseq.arg[0]);
2167 break;
2168 case 'l': /* RM -- Reset Mode */
2169 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
2170 break;
2171 case 'M': /* DL -- Delete <n> lines */
2172 DEFAULT(csiescseq.arg[0], 1);
2173 tdeleteline(csiescseq.arg[0]);
2174 break;
2175 case 'X': /* ECH -- Erase <n> char */
2176 DEFAULT(csiescseq.arg[0], 1);
2177 tclearregion(term.c.x, term.c.y,
2178 term.c.x + csiescseq.arg[0] - 1, term.c.y);
2179 break;
2180 case 'P': /* DCH -- Delete <n> char */
2181 DEFAULT(csiescseq.arg[0], 1);
2182 tdeletechar(csiescseq.arg[0]);
2183 break;
2184 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
2185 DEFAULT(csiescseq.arg[0], 1);
2186 tputtab(-csiescseq.arg[0]);
2187 break;
2188 case 'd': /* VPA -- Move to <row> */
2189 DEFAULT(csiescseq.arg[0], 1);
2190 tmoveato(term.c.x, csiescseq.arg[0]-1);
2191 break;
2192 case 'h': /* SM -- Set terminal mode */
2193 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
2194 break;
2195 case 'm': /* SGR -- Terminal attribute (color) */
2196 tsetattr(csiescseq.arg, csiescseq.narg);
2197 break;
2198 case 'n': /* DSR – Device Status Report (cursor position) */
2199 if (csiescseq.arg[0] == 6) {
2200 len = snprintf(buf, sizeof(buf),"\033[%i;%iR",
2201 term.c.y+1, term.c.x+1);
2202 ttywrite(buf, len);
2203 }
2204 break;
2205 case 'r': /* DECSTBM -- Set Scrolling Region */
2206 if(csiescseq.priv) {
2207 goto unknown;
2208 } else {
2209 DEFAULT(csiescseq.arg[0], 1);
2210 DEFAULT(csiescseq.arg[1], term.row);
2211 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
2212 tmoveato(0, 0);
2213 }
2214 break;
2215 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
2216 tcursor(CURSOR_SAVE);
2217 break;
2218 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
2219 tcursor(CURSOR_LOAD);
2220 break;
2221 case ' ':
2222 switch (csiescseq.mode[1]) {
2223 case 'q': /* DECSCUSR -- Set Cursor Style */
2224 DEFAULT(csiescseq.arg[0], 1);
2225 if (!BETWEEN(csiescseq.arg[0], 0, 6)) {
2226 goto unknown;
2227 }
2228 xw.cursor = csiescseq.arg[0];
2229 break;
2230 default:
2231 goto unknown;
2232 }
2233 break;
2234 }
2235 }
2236
2237 void
2238 csidump(void) {
2239 int i;
2240 uint c;
2241
2242 printf("ESC[");
2243 for(i = 0; i < csiescseq.len; i++) {
2244 c = csiescseq.buf[i] & 0xff;
2245 if(isprint(c)) {
2246 putchar(c);
2247 } else if(c == '\n') {
2248 printf("(\\n)");
2249 } else if(c == '\r') {
2250 printf("(\\r)");
2251 } else if(c == 0x1b) {
2252 printf("(\\e)");
2253 } else {
2254 printf("(%02x)", c);
2255 }
2256 }
2257 putchar('\n');
2258 }
2259
2260 void
2261 csireset(void) {
2262 memset(&csiescseq, 0, sizeof(csiescseq));
2263 }
2264
2265 void
2266 strhandle(void) {
2267 char *p = NULL;
2268 int j, narg, par;
2269
2270 term.esc &= ~(ESC_STR_END|ESC_STR);
2271 strparse();
2272 narg = strescseq.narg;
2273 par = atoi(strescseq.args[0]);
2274
2275 switch(strescseq.type) {
2276 case ']': /* OSC -- Operating System Command */
2277 switch(par) {
2278 case 0:
2279 case 1:
2280 case 2:
2281 if(narg > 1)
2282 xsettitle(strescseq.args[1]);
2283 return;
2284 case 4: /* color set */
2285 if(narg < 3)
2286 break;
2287 p = strescseq.args[2];
2288 /* FALLTHROUGH */
2289 case 104: /* color reset, here p = NULL */
2290 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2291 if(xsetcolorname(j, p)) {
2292 fprintf(stderr, "erresc: invalid color %s\n", p);
2293 } else {
2294 /*
2295 * TODO if defaultbg color is changed, borders
2296 * are dirty
2297 */
2298 redraw();
2299 }
2300 return;
2301 }
2302 break;
2303 case 'k': /* old title set compatibility */
2304 xsettitle(strescseq.args[0]);
2305 return;
2306 case 'P': /* DCS -- Device Control String */
2307 case '_': /* APC -- Application Program Command */
2308 case '^': /* PM -- Privacy Message */
2309 return;
2310 }
2311
2312 fprintf(stderr, "erresc: unknown str ");
2313 strdump();
2314 }
2315
2316 void
2317 strparse(void) {
2318 int c;
2319 char *p = strescseq.buf;
2320
2321 strescseq.narg = 0;
2322 strescseq.buf[strescseq.len] = '\0';
2323
2324 if(*p == '\0')
2325 return;
2326
2327 while(strescseq.narg < STR_ARG_SIZ) {
2328 strescseq.args[strescseq.narg++] = p;
2329 while((c = *p) != ';' && c != '\0')
2330 ++p;
2331 if(c == '\0')
2332 return;
2333 *p++ = '\0';
2334 }
2335 }
2336
2337 void
2338 strdump(void) {
2339 int i;
2340 uint c;
2341
2342 printf("ESC%c", strescseq.type);
2343 for(i = 0; i < strescseq.len; i++) {
2344 c = strescseq.buf[i] & 0xff;
2345 if(c == '\0') {
2346 return;
2347 } else if(isprint(c)) {
2348 putchar(c);
2349 } else if(c == '\n') {
2350 printf("(\\n)");
2351 } else if(c == '\r') {
2352 printf("(\\r)");
2353 } else if(c == 0x1b) {
2354 printf("(\\e)");
2355 } else {
2356 printf("(%02x)", c);
2357 }
2358 }
2359 printf("ESC\\\n");
2360 }
2361
2362 void
2363 strreset(void) {
2364 memset(&strescseq, 0, sizeof(strescseq));
2365 }
2366
2367 void
2368 tprinter(char *s, size_t len) {
2369 if(iofd != -1 && xwrite(iofd, s, len) < 0) {
2370 fprintf(stderr, "Error writing in %s:%s\n",
2371 opt_io, strerror(errno));
2372 close(iofd);
2373 iofd = -1;
2374 }
2375 }
2376
2377 void
2378 toggleprinter(const Arg *arg) {
2379 term.mode ^= MODE_PRINT;
2380 }
2381
2382 void
2383 printscreen(const Arg *arg) {
2384 tdump();
2385 }
2386
2387 void
2388 printsel(const Arg *arg) {
2389 tdumpsel();
2390 }
2391
2392 void
2393 tdumpsel(void) {
2394 char *ptr;
2395
2396 if((ptr = getsel())) {
2397 tprinter(ptr, strlen(ptr));
2398 free(ptr);
2399 }
2400 }
2401
2402 void
2403 tdumpline(int n) {
2404 Glyph *bp, *end;
2405
2406 bp = &term.line[n][0];
2407 end = &bp[MIN(tlinelen(n), term.col) - 1];
2408 if(bp != end || bp->c[0] != ' ') {
2409 for( ;bp <= end; ++bp)
2410 tprinter(bp->c, utf8len(bp->c));
2411 }
2412 tprinter("\n", 1);
2413 }
2414
2415 void
2416 tdump(void) {
2417 int i;
2418
2419 for(i = 0; i < term.row; ++i)
2420 tdumpline(i);
2421 }
2422
2423 void
2424 tputtab(int n) {
2425 uint x = term.c.x;
2426
2427 if(n > 0) {
2428 while(x < term.col && n--)
2429 for(++x; x < term.col && !term.tabs[x]; ++x)
2430 /* nothing */ ;
2431 } else if(n < 0) {
2432 while(x > 0 && n++)
2433 for(--x; x > 0 && !term.tabs[x]; --x)
2434 /* nothing */ ;
2435 }
2436 term.c.x = LIMIT(x, 0, term.col-1);
2437 }
2438
2439 void
2440 techo(char *buf, int len) {
2441 for(; len > 0; buf++, len--) {
2442 char c = *buf;
2443
2444 if(ISCONTROL((uchar) c)) { /* control code */
2445 if(c & 0x80) {
2446 c &= 0x7f;
2447 tputc("^", 1);
2448 tputc("[", 1);
2449 } else if(c != '\n' && c != '\r' && c != '\t') {
2450 c ^= 0x40;
2451 tputc("^", 1);
2452 }
2453 tputc(&c, 1);
2454 } else {
2455 break;
2456 }
2457 }
2458 if(len)
2459 tputc(buf, len);
2460 }
2461
2462 void
2463 tdeftran(char ascii) {
2464 static char cs[] = "0B";
2465 static int vcs[] = {CS_GRAPHIC0, CS_USA};
2466 char *p;
2467
2468 if((p = strchr(cs, ascii)) == NULL) {
2469 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2470 } else {
2471 term.trantbl[term.icharset] = vcs[p - cs];
2472 }
2473 }
2474
2475 void
2476 tdectest(char c) {
2477 static char E[UTF_SIZ] = "E";
2478 int x, y;
2479
2480 if(c == '8') { /* DEC screen alignment test. */
2481 for(x = 0; x < term.col; ++x) {
2482 for(y = 0; y < term.row; ++y)
2483 tsetchar(E, &term.c.attr, x, y);
2484 }
2485 }
2486 }
2487
2488 void
2489 tstrsequence(uchar c) {
2490 switch (c) {
2491 case 0x90: /* DCS -- Device Control String */
2492 c = 'P';
2493 break;
2494 case 0x9f: /* APC -- Application Program Command */
2495 c = '_';
2496 break;
2497 case 0x9e: /* PM -- Privacy Message */
2498 c = '^';
2499 break;
2500 case 0x9d: /* OSC -- Operating System Command */
2501 c = ']';
2502 break;
2503 }
2504 strreset();
2505 strescseq.type = c;
2506 term.esc |= ESC_STR;
2507 return;
2508 }
2509
2510 void
2511 tcontrolcode(uchar ascii) {
2512 static char question[UTF_SIZ] = "?";
2513
2514 switch(ascii) {
2515 case '\t': /* HT */
2516 tputtab(1);
2517 return;
2518 case '\b': /* BS */
2519 tmoveto(term.c.x-1, term.c.y);
2520 return;
2521 case '\r': /* CR */
2522 tmoveto(0, term.c.y);
2523 return;
2524 case '\f': /* LF */
2525 case '\v': /* VT */
2526 case '\n': /* LF */
2527 /* go to first col if the mode is set */
2528 tnewline(IS_SET(MODE_CRLF));
2529 return;
2530 case '\a': /* BEL */
2531 if(term.esc & ESC_STR_END) {
2532 /* backwards compatibility to xterm */
2533 strhandle();
2534 } else {
2535 if(!(xw.state & WIN_FOCUSED))
2536 xseturgency(1);
2537 if (bellvolume)
2538 XkbBell(xw.dpy, xw.win, bellvolume, (Atom)NULL);
2539 }
2540 break;
2541 case '\033': /* ESC */
2542 csireset();
2543 term.esc &= ~(ESC_CSI|ESC_ALTCHARSET|ESC_TEST);
2544 term.esc |= ESC_START;
2545 return;
2546 case '\016': /* SO (LS1 -- Locking shift 1) */
2547 case '\017': /* SI (LS0 -- Locking shift 0) */
2548 term.charset = 1 - (ascii - '\016');
2549 return;
2550 case '\032': /* SUB */
2551 tsetchar(question, &term.c.attr, term.c.x, term.c.y);
2552 case '\030': /* CAN */
2553 csireset();
2554 break;
2555 case '\005': /* ENQ (IGNORED) */
2556 case '\000': /* NUL (IGNORED) */
2557 case '\021': /* XON (IGNORED) */
2558 case '\023': /* XOFF (IGNORED) */
2559 case 0177: /* DEL (IGNORED) */
2560 return;
2561 case 0x84: /* TODO: IND */
2562 break;
2563 case 0x85: /* NEL -- Next line */
2564 tnewline(1); /* always go to first col */
2565 break;
2566 case 0x88: /* HTS -- Horizontal tab stop */
2567 term.tabs[term.c.x] = 1;
2568 break;
2569 case 0x8d: /* TODO: RI */
2570 case 0x8e: /* TODO: SS2 */
2571 case 0x8f: /* TODO: SS3 */
2572 case 0x98: /* TODO: SOS */
2573 break;
2574 case 0x9a: /* DECID -- Identify Terminal */
2575 ttywrite(vtiden, sizeof(vtiden) - 1);
2576 break;
2577 case 0x9b: /* TODO: CSI */
2578 case 0x9c: /* TODO: ST */
2579 break;
2580 case 0x90: /* DCS -- Device Control String */
2581 case 0x9f: /* APC -- Application Program Command */
2582 case 0x9e: /* PM -- Privacy Message */
2583 case 0x9d: /* OSC -- Operating System Command */
2584 tstrsequence(ascii);
2585 return;
2586 }
2587 /* only CAN, SUB, \a and C1 chars interrupt a sequence */
2588 term.esc &= ~(ESC_STR_END|ESC_STR);
2589 return;
2590 }
2591
2592 /*
2593 * returns 1 when the sequence is finished and it hasn't to read
2594 * more characters for this sequence, otherwise 0
2595 */
2596 int
2597 eschandle(uchar ascii) {
2598 switch(ascii) {
2599 case '[':
2600 term.esc |= ESC_CSI;
2601 return 0;
2602 case '#':
2603 term.esc |= ESC_TEST;
2604 return 0;
2605 case 'P': /* DCS -- Device Control String */
2606 case '_': /* APC -- Application Program Command */
2607 case '^': /* PM -- Privacy Message */
2608 case ']': /* OSC -- Operating System Command */
2609 case 'k': /* old title set compatibility */
2610 tstrsequence(ascii);
2611 return 0;
2612 case 'n': /* LS2 -- Locking shift 2 */
2613 case 'o': /* LS3 -- Locking shift 3 */
2614 term.charset = 2 + (ascii - 'n');
2615 break;
2616 case '(': /* GZD4 -- set primary charset G0 */
2617 case ')': /* G1D4 -- set secondary charset G1 */
2618 case '*': /* G2D4 -- set tertiary charset G2 */
2619 case '+': /* G3D4 -- set quaternary charset G3 */
2620 term.icharset = ascii - '(';
2621 term.esc |= ESC_ALTCHARSET;
2622 return 0;
2623 case 'D': /* IND -- Linefeed */
2624 if(term.c.y == term.bot) {
2625 tscrollup(term.top, 1);
2626 } else {
2627 tmoveto(term.c.x, term.c.y+1);
2628 }
2629 break;
2630 case 'E': /* NEL -- Next line */
2631 tnewline(1); /* always go to first col */
2632 break;
2633 case 'H': /* HTS -- Horizontal tab stop */
2634 term.tabs[term.c.x] = 1;
2635 break;
2636 case 'M': /* RI -- Reverse index */
2637 if(term.c.y == term.top) {
2638 tscrolldown(term.top, 1);
2639 } else {
2640 tmoveto(term.c.x, term.c.y-1);
2641 }
2642 break;
2643 case 'Z': /* DECID -- Identify Terminal */
2644 ttywrite(vtiden, sizeof(vtiden) - 1);
2645 break;
2646 case 'c': /* RIS -- Reset to inital state */
2647 treset();
2648 xresettitle();
2649 xloadcols();
2650 break;
2651 case '=': /* DECPAM -- Application keypad */
2652 term.mode |= MODE_APPKEYPAD;
2653 break;
2654 case '>': /* DECPNM -- Normal keypad */
2655 term.mode &= ~MODE_APPKEYPAD;
2656 break;
2657 case '7': /* DECSC -- Save Cursor */
2658 tcursor(CURSOR_SAVE);
2659 break;
2660 case '8': /* DECRC -- Restore Cursor */
2661 tcursor(CURSOR_LOAD);
2662 break;
2663 case '\\': /* ST -- String Terminator */
2664 if(term.esc & ESC_STR_END)
2665 strhandle();
2666 break;
2667 default:
2668 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2669 (uchar) ascii, isprint(ascii)? ascii:'.');
2670 break;
2671 }
2672 return 1;
2673 }
2674
2675 void
2676 tputc(char *c, int len) {
2677 uchar ascii;
2678 bool control;
2679 long unicodep;
2680 int width;
2681 Glyph *gp;
2682
2683 if(len == 1) {
2684 width = 1;
2685 unicodep = ascii = *c;
2686 } else {
2687 utf8decode(c, &unicodep, UTF_SIZ);
2688 if ((width = wcwidth(unicodep)) == -1) {
2689 c = "\357\277\275"; /* UTF_INVALID */
2690 width = 1;
2691 }
2692 ascii = unicodep;
2693 }
2694
2695 if(IS_SET(MODE_PRINT))
2696 tprinter(c, len);
2697 control = ISCONTROL(unicodep);
2698
2699 /*
2700 * STR sequence must be checked before anything else
2701 * because it uses all following characters until it
2702 * receives a ESC, a SUB, a ST or any other C1 control
2703 * character.
2704 */
2705 if(term.esc & ESC_STR) {
2706 if(len == 1 &&
2707 (ascii == '\a' || ascii == 030 ||
2708 ascii == 032 || ascii == 033 ||
2709 ISCONTROLC1(unicodep))) {
2710 term.esc &= ~(ESC_START|ESC_STR);
2711 term.esc |= ESC_STR_END;
2712 } else if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2713 memmove(&strescseq.buf[strescseq.len], c, len);
2714 strescseq.len += len;
2715 return;
2716 } else {
2717 /*
2718 * Here is a bug in terminals. If the user never sends
2719 * some code to stop the str or esc command, then st
2720 * will stop responding. But this is better than
2721 * silently failing with unknown characters. At least
2722 * then users will report back.
2723 *
2724 * In the case users ever get fixed, here is the code:
2725 */
2726 /*
2727 * term.esc = 0;
2728 * strhandle();
2729 */
2730 return;
2731 }
2732 }
2733
2734 /*
2735 * Actions of control codes must be performed as soon they arrive
2736 * because they can be embedded inside a control sequence, and
2737 * they must not cause conflicts with sequences.
2738 */
2739 if(control) {
2740 tcontrolcode(ascii);
2741 /*
2742 * control codes are not shown ever
2743 */
2744 return;
2745 } else if(term.esc & ESC_START) {
2746 if(term.esc & ESC_CSI) {
2747 csiescseq.buf[csiescseq.len++] = ascii;
2748 if(BETWEEN(ascii, 0x40, 0x7E)
2749 || csiescseq.len >= \
2750 sizeof(csiescseq.buf)-1) {
2751 term.esc = 0;
2752 csiparse();
2753 csihandle();
2754 }
2755 return;
2756 } else if(term.esc & ESC_ALTCHARSET) {
2757 tdeftran(ascii);
2758 } else if(term.esc & ESC_TEST) {
2759 tdectest(ascii);
2760 } else {
2761 if (!eschandle(ascii))
2762 return;
2763 /* sequence already finished */
2764 }
2765 term.esc = 0;
2766 /*
2767 * All characters which form part of a sequence are not
2768 * printed
2769 */
2770 return;
2771 }
2772 if(sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
2773 selclear(NULL);
2774
2775 gp = &term.line[term.c.y][term.c.x];
2776 if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2777 gp->mode |= ATTR_WRAP;
2778 tnewline(1);
2779 gp = &term.line[term.c.y][term.c.x];
2780 }
2781
2782 if(IS_SET(MODE_INSERT) && term.c.x+width < term.col)
2783 memmove(gp+width, gp, (term.col - term.c.x - width) * sizeof(Glyph));
2784
2785 if(term.c.x+width > term.col) {
2786 tnewline(1);
2787 gp = &term.line[term.c.y][term.c.x];
2788 }
2789
2790 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2791
2792 if(width == 2) {
2793 gp->mode |= ATTR_WIDE;
2794 if(term.c.x+1 < term.col) {
2795 gp[1].c[0] = '\0';
2796 gp[1].mode = ATTR_WDUMMY;
2797 }
2798 }
2799 if(term.c.x+width < term.col) {
2800 tmoveto(term.c.x+width, term.c.y);
2801 } else {
2802 term.c.state |= CURSOR_WRAPNEXT;
2803 }
2804 }
2805
2806 void
2807 tresize(int col, int row) {
2808 int i;
2809 int minrow = MIN(row, term.row);
2810 int mincol = MIN(col, term.col);
2811 bool *bp;
2812 TCursor c;
2813
2814 if(col < 1 || row < 1) {
2815 fprintf(stderr,
2816 "tresize: error resizing to %dx%d\n", col, row);
2817 return;
2818 }
2819
2820 /*
2821 * slide screen to keep cursor where we expect it -
2822 * tscrollup would work here, but we can optimize to
2823 * memmove because we're freeing the earlier lines
2824 */
2825 for(i = 0; i <= term.c.y - row; i++) {
2826 free(term.line[i]);
2827 free(term.alt[i]);
2828 }
2829 /* ensure that both src and dst are not NULL */
2830 if (i > 0) {
2831 memmove(term.line, term.line + i, row * sizeof(Line));
2832 memmove(term.alt, term.alt + i, row * sizeof(Line));
2833 }
2834 for(i += row; i < term.row; i++) {
2835 free(term.line[i]);
2836 free(term.alt[i]);
2837 }
2838
2839 /* resize to new height */
2840 term.line = xrealloc(term.line, row * sizeof(Line));
2841 term.alt = xrealloc(term.alt, row * sizeof(Line));
2842 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2843 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2844
2845 /* resize each row to new width, zero-pad if needed */
2846 for(i = 0; i < minrow; i++) {
2847 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2848 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2849 }
2850
2851 /* allocate any new rows */
2852 for(/* i == minrow */; i < row; i++) {
2853 term.line[i] = xmalloc(col * sizeof(Glyph));
2854 term.alt[i] = xmalloc(col * sizeof(Glyph));
2855 }
2856 if(col > term.col) {
2857 bp = term.tabs + term.col;
2858
2859 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2860 while(--bp > term.tabs && !*bp)
2861 /* nothing */ ;
2862 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2863 *bp = 1;
2864 }
2865 /* update terminal size */
2866 term.col = col;
2867 term.row = row;
2868 /* reset scrolling region */
2869 tsetscroll(0, row-1);
2870 /* make use of the LIMIT in tmoveto */
2871 tmoveto(term.c.x, term.c.y);
2872 /* Clearing both screens (it makes dirty all lines) */
2873 c = term.c;
2874 for(i = 0; i < 2; i++) {
2875 if(mincol < col && 0 < minrow) {
2876 tclearregion(mincol, 0, col - 1, minrow - 1);
2877 }
2878 if(0 < col && minrow < row) {
2879 tclearregion(0, minrow, col - 1, row - 1);
2880 }
2881 tswapscreen();
2882 tcursor(CURSOR_LOAD);
2883 }
2884 term.c = c;
2885 }
2886
2887 void
2888 xresize(int col, int row) {
2889 xw.tw = MAX(1, col * xw.cw);
2890 xw.th = MAX(1, row * xw.ch);
2891
2892 XFreePixmap(xw.dpy, xw.buf);
2893 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2894 DefaultDepth(xw.dpy, xw.scr));
2895 XftDrawChange(xw.draw, xw.buf);
2896 xclear(0, 0, xw.w, xw.h);
2897 }
2898
2899 ushort
2900 sixd_to_16bit(int x) {
2901 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2902 }
2903
2904 void
2905 xloadcols(void) {
2906 int i;
2907 XRenderColor color = { .alpha = 0xffff };
2908 static bool loaded;
2909 Color *cp;
2910
2911 if(loaded) {
2912 for (cp = dc.col; cp < dc.col + LEN(dc.col); ++cp)
2913 XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
2914 }
2915
2916 /* load colors [0-15] and [256-LEN(colorname)] (config.h) */
2917 for(i = 0; i < LEN(colorname); i++) {
2918 if(!colorname[i])
2919 continue;
2920 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2921 die("Could not allocate color '%s'\n", colorname[i]);
2922 }
2923 }
2924
2925 /* load colors [16-231] ; same colors as xterm */
2926 for(i = 16; i < 6*6*6+16; i++) {
2927 color.red = sixd_to_16bit( ((i-16)/36)%6 );
2928 color.green = sixd_to_16bit( ((i-16)/6) %6 );
2929 color.blue = sixd_to_16bit( ((i-16)/1) %6 );
2930 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i]))
2931 die("Could not allocate color %d\n", i);
2932 }
2933
2934 /* load colors [232-255] ; grayscale */
2935 for(; i < 256; i++) {
2936 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (i-(6*6*6+16));
2937 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i]))
2938 die("Could not allocate color %d\n", i);
2939 }
2940 loaded = true;
2941 }
2942
2943 int
2944 xsetcolorname(int x, const char *name) {
2945 XRenderColor color = { .alpha = 0xffff };
2946 Color ncolor;
2947
2948 if(!BETWEEN(x, 0, LEN(colorname)))
2949 return 1;
2950
2951 if(!name) {
2952 if(BETWEEN(x, 16, 16 + 215)) { /* 256 color */
2953 color.red = sixd_to_16bit( ((x-16)/36)%6 );
2954 color.green = sixd_to_16bit( ((x-16)/6) %6 );
2955 color.blue = sixd_to_16bit( ((x-16)/1) %6 );
2956 if(!XftColorAllocValue(xw.dpy, xw.vis,
2957 xw.cmap, &color, &ncolor)) {
2958 return 1;
2959 }
2960
2961 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2962 dc.col[x] = ncolor;
2963 return 0;
2964 } else if(BETWEEN(x, 16 + 216, 255)) { /* greyscale */
2965 color.red = color.green = color.blue = \
2966 0x0808 + 0x0a0a * (x - (16 + 216));
2967 if(!XftColorAllocValue(xw.dpy, xw.vis,
2968 xw.cmap, &color, &ncolor)) {
2969 return 1;
2970 }
2971
2972 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2973 dc.col[x] = ncolor;
2974 return 0;
2975 } else { /* system colors */
2976 name = colorname[x];
2977 }
2978 }
2979 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &ncolor))
2980 return 1;
2981
2982 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2983 dc.col[x] = ncolor;
2984 return 0;
2985 }
2986
2987 void
2988 xtermclear(int col1, int row1, int col2, int row2) {
2989 XftDrawRect(xw.draw,
2990 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2991 borderpx + col1 * xw.cw,
2992 borderpx + row1 * xw.ch,
2993 (col2-col1+1) * xw.cw,
2994 (row2-row1+1) * xw.ch);
2995 }
2996
2997 /*
2998 * Absolute coordinates.
2999 */
3000 void
3001 xclear(int x1, int y1, int x2, int y2) {
3002 XftDrawRect(xw.draw,
3003 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
3004 x1, y1, x2-x1, y2-y1);
3005 }
3006
3007 void
3008 xhints(void) {
3009 XClassHint class = {opt_class ? opt_class : termname, termname};
3010 XWMHints wm = {.flags = InputHint, .input = 1};
3011 XSizeHints *sizeh = NULL;
3012
3013 sizeh = XAllocSizeHints();
3014
3015 sizeh->flags = PSize | PResizeInc | PBaseSize;
3016 sizeh->height = xw.h;
3017 sizeh->width = xw.w;
3018 sizeh->height_inc = xw.ch;
3019 sizeh->width_inc = xw.cw;
3020 sizeh->base_height = 2 * borderpx;
3021 sizeh->base_width = 2 * borderpx;
3022 if(xw.isfixed == True) {
3023 sizeh->flags |= PMaxSize | PMinSize;
3024 sizeh->min_width = sizeh->max_width = xw.w;
3025 sizeh->min_height = sizeh->max_height = xw.h;
3026 }
3027 if(xw.gm & (XValue|YValue)) {
3028 sizeh->flags |= USPosition | PWinGravity;
3029 sizeh->x = xw.l;
3030 sizeh->y = xw.t;
3031 sizeh->win_gravity = xgeommasktogravity(xw.gm);
3032 }
3033
3034 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
3035 &class);
3036 XFree(sizeh);
3037 }
3038
3039 int
3040 xgeommasktogravity(int mask) {
3041 switch(mask & (XNegative|YNegative)) {
3042 case 0:
3043 return NorthWestGravity;
3044 case XNegative:
3045 return NorthEastGravity;
3046 case YNegative:
3047 return SouthWestGravity;
3048 }
3049 return SouthEastGravity;
3050 }
3051
3052 int
3053 xloadfont(Font *f, FcPattern *pattern) {
3054 FcPattern *match;
3055 FcResult result;
3056
3057 match = FcFontMatch(NULL, pattern, &result);
3058 if(!match)
3059 return 1;
3060
3061 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
3062 FcPatternDestroy(match);
3063 return 1;
3064 }
3065
3066 f->set = NULL;
3067 f->pattern = FcPatternDuplicate(pattern);
3068
3069 f->ascent = f->match->ascent;
3070 f->descent = f->match->descent;
3071 f->lbearing = 0;
3072 f->rbearing = f->match->max_advance_width;
3073
3074 f->height = f->ascent + f->descent;
3075 f->width = f->lbearing + f->rbearing;
3076
3077 return 0;
3078 }
3079
3080 void
3081 xloadfonts(char *fontstr, double fontsize) {
3082 FcPattern *pattern;
3083 FcResult r_sz, r_psz;
3084 double fontval;
3085 float ceilf(float);
3086
3087 if(fontstr[0] == '-') {
3088 pattern = XftXlfdParse(fontstr, False, False);
3089 } else {
3090 pattern = FcNameParse((FcChar8 *)fontstr);
3091 }
3092
3093 if(!pattern)
3094 die("st: can't open font %s\n", fontstr);
3095
3096 if(fontsize > 1) {
3097 FcPatternDel(pattern, FC_PIXEL_SIZE);
3098 FcPatternDel(pattern, FC_SIZE);
3099 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
3100 usedfontsize = fontsize;
3101 } else {
3102 r_psz = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
3103 r_sz = FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval);
3104 if(r_psz == FcResultMatch) {
3105 usedfontsize = fontval;
3106 } else if(r_sz == FcResultMatch) {
3107 usedfontsize = -1;
3108 } else {
3109 /*
3110 * Default font size is 12, if none given. This is to
3111 * have a known usedfontsize value.
3112 */
3113 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
3114 usedfontsize = 12;
3115 }
3116 defaultfontsize = usedfontsize;
3117 }
3118
3119 FcConfigSubstitute(0, pattern, FcMatchPattern);
3120 FcDefaultSubstitute(pattern);
3121
3122 if(xloadfont(&dc.font, pattern))
3123 die("st: can't open font %s\n", fontstr);
3124
3125 if(usedfontsize < 0) {
3126 FcPatternGetDouble(dc.font.match->pattern,
3127 FC_PIXEL_SIZE, 0, &fontval);
3128 usedfontsize = fontval;
3129 if(fontsize == 0)
3130 defaultfontsize = fontval;
3131 }
3132
3133 /* Setting character width and height. */
3134 xw.cw = ceilf(dc.font.width * cwscale);
3135 xw.ch = ceilf(dc.font.height * chscale);
3136
3137 FcPatternDel(pattern, FC_SLANT);
3138 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
3139 if(xloadfont(&dc.ifont, pattern))
3140 die("st: can't open font %s\n", fontstr);
3141
3142 FcPatternDel(pattern, FC_WEIGHT);
3143 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
3144 if(xloadfont(&dc.ibfont, pattern))
3145 die("st: can't open font %s\n", fontstr);
3146
3147 FcPatternDel(pattern, FC_SLANT);
3148 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
3149 if(xloadfont(&dc.bfont, pattern))
3150 die("st: can't open font %s\n", fontstr);
3151
3152 FcPatternDestroy(pattern);
3153 }
3154
3155 void
3156 xunloadfont(Font *f) {
3157 XftFontClose(xw.dpy, f->match);
3158 FcPatternDestroy(f->pattern);
3159 if(f->set)
3160 FcFontSetDestroy(f->set);
3161 }
3162
3163 void
3164 xunloadfonts(void) {
3165 /* Free the loaded fonts in the font cache. */
3166 while(frclen > 0)
3167 XftFontClose(xw.dpy, frc[--frclen].font);
3168
3169 xunloadfont(&dc.font);
3170 xunloadfont(&dc.bfont);
3171 xunloadfont(&dc.ifont);
3172 xunloadfont(&dc.ibfont);
3173 }
3174
3175 void
3176 xzoom(const Arg *arg) {
3177 Arg larg;
3178
3179 larg.i = usedfontsize + arg->i;
3180 xzoomabs(&larg);
3181 }
3182
3183 void
3184 xzoomabs(const Arg *arg) {
3185 xunloadfonts();
3186 xloadfonts(usedfont, arg->i);
3187 cresize(0, 0);
3188 redraw();
3189 xhints();
3190 }
3191
3192 void
3193 xzoomreset(const Arg *arg) {
3194 Arg larg;
3195
3196 if(defaultfontsize > 0) {
3197 larg.i = defaultfontsize;
3198 xzoomabs(&larg);
3199 }
3200 }
3201
3202 void
3203 xinit(void) {
3204 XGCValues gcvalues;
3205 Cursor cursor;
3206 Window parent;
3207 pid_t thispid = getpid();
3208
3209 if(!(xw.dpy = XOpenDisplay(NULL)))
3210 die("Can't open display\n");
3211 xw.scr = XDefaultScreen(xw.dpy);
3212 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
3213
3214 /* font */
3215 if(!FcInit())
3216 die("Could not init fontconfig.\n");
3217
3218 usedfont = (opt_font == NULL)? font : opt_font;
3219 xloadfonts(usedfont, 0);
3220
3221 /* colors */
3222 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
3223 xloadcols();
3224
3225 /* adjust fixed window geometry */
3226 xw.w = 2 * borderpx + term.col * xw.cw;
3227 xw.h = 2 * borderpx + term.row * xw.ch;
3228 if(xw.gm & XNegative)
3229 xw.l += DisplayWidth(xw.dpy, xw.scr) - xw.w - 2;
3230 if(xw.gm & YNegative)
3231 xw.t += DisplayWidth(xw.dpy, xw.scr) - xw.h - 2;
3232
3233 /* Events */
3234 xw.attrs.background_pixel = dc.col[defaultbg].pixel;
3235 xw.attrs.border_pixel = dc.col[defaultbg].pixel;
3236 xw.attrs.bit_gravity = NorthWestGravity;
3237 xw.attrs.event_mask = FocusChangeMask | KeyPressMask
3238 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
3239 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
3240 xw.attrs.colormap = xw.cmap;
3241
3242 if (!(opt_embed && (parent = strtol(opt_embed, NULL, 0))))
3243 parent = XRootWindow(xw.dpy, xw.scr);
3244 xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
3245 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
3246 xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
3247 | CWEventMask | CWColormap, &xw.attrs);
3248
3249 memset(&gcvalues, 0, sizeof(gcvalues));
3250 gcvalues.graphics_exposures = False;
3251 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
3252 &gcvalues);
3253 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
3254 DefaultDepth(xw.dpy, xw.scr));
3255 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
3256 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
3257
3258 /* Xft rendering context */
3259 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
3260
3261 /* input methods */
3262 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3263 XSetLocaleModifiers("@im=local");
3264 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3265 XSetLocaleModifiers("@im=");
3266 if((xw.xim = XOpenIM(xw.dpy,
3267 NULL, NULL, NULL)) == NULL) {
3268 die("XOpenIM failed. Could not open input"
3269 " device.\n");
3270 }
3271 }
3272 }
3273 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
3274 | XIMStatusNothing, XNClientWindow, xw.win,
3275 XNFocusWindow, xw.win, NULL);
3276 if(xw.xic == NULL)
3277 die("XCreateIC failed. Could not obtain input method.\n");
3278
3279 /* white cursor, black outline */
3280 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
3281 XDefineCursor(xw.dpy, xw.win, cursor);
3282 XRecolorCursor(xw.dpy, cursor,
3283 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
3284 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
3285
3286 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
3287 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
3288 xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
3289 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
3290
3291 xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
3292 XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
3293 PropModeReplace, (uchar *)&thispid, 1);
3294
3295 xresettitle();
3296 XMapWindow(xw.dpy, xw.win);
3297 xhints();
3298 XSync(xw.dpy, False);
3299 }
3300
3301 void
3302 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
3303 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
3304 width = charlen * xw.cw, xp, i;
3305 int frcflags, charexists;
3306 int u8fl, u8fblen, u8cblen, doesexist;
3307 char *u8c, *u8fs;
3308 long unicodep;
3309 Font *font = &dc.font;
3310 FcResult fcres;
3311 FcPattern *fcpattern, *fontpattern;
3312 FcFontSet *fcsets[] = { NULL };
3313 FcCharSet *fccharset;
3314 Color *fg, *bg, *temp, revfg, revbg, truefg, truebg;
3315 XRenderColor colfg, colbg;
3316 XRectangle r;
3317 int oneatatime;
3318
3319 frcflags = FRC_NORMAL;
3320
3321 if(base.mode & ATTR_ITALIC) {
3322 if(base.fg == defaultfg)
3323 base.fg = defaultitalic;
3324 font = &dc.ifont;
3325 frcflags = FRC_ITALIC;
3326 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
3327 if(base.fg == defaultfg)
3328 base.fg = defaultitalic;
3329 font = &dc.ibfont;
3330 frcflags = FRC_ITALICBOLD;
3331 } else if(base.mode & ATTR_UNDERLINE) {
3332 if(base.fg == defaultfg)
3333 base.fg = defaultunderline;
3334 }
3335
3336 if(IS_TRUECOL(base.fg)) {
3337 colfg.alpha = 0xffff;
3338 colfg.red = TRUERED(base.fg);
3339 colfg.green = TRUEGREEN(base.fg);
3340 colfg.blue = TRUEBLUE(base.fg);
3341 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
3342 fg = &truefg;
3343 } else {
3344 fg = &dc.col[base.fg];
3345 }
3346
3347 if(IS_TRUECOL(base.bg)) {
3348 colbg.alpha = 0xffff;
3349 colbg.green = TRUEGREEN(base.bg);
3350 colbg.red = TRUERED(base.bg);
3351 colbg.blue = TRUEBLUE(base.bg);
3352 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
3353 bg = &truebg;
3354 } else {
3355 bg = &dc.col[base.bg];
3356 }
3357
3358 if(base.mode & ATTR_BOLD) {
3359 /*
3360 * change basic system colors [0-7]
3361 * to bright system colors [8-15]
3362 */
3363 if(BETWEEN(base.fg, 0, 7) && !(base.mode & ATTR_FAINT))
3364 fg = &dc.col[base.fg + 8];
3365
3366 if(base.mode & ATTR_ITALIC) {
3367 font = &dc.ibfont;
3368 frcflags = FRC_ITALICBOLD;
3369 } else {
3370 font = &dc.bfont;
3371 frcflags = FRC_BOLD;
3372 }
3373 }
3374
3375 if(IS_SET(MODE_REVERSE)) {
3376 if(fg == &dc.col[defaultfg]) {
3377 fg = &dc.col[defaultbg];
3378 } else {
3379 colfg.red = ~fg->color.red;
3380 colfg.green = ~fg->color.green;
3381 colfg.blue = ~fg->color.blue;
3382 colfg.alpha = fg->color.alpha;
3383 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
3384 &revfg);
3385 fg = &revfg;
3386 }
3387
3388 if(bg == &dc.col[defaultbg]) {
3389 bg = &dc.col[defaultfg];
3390 } else {
3391 colbg.red = ~bg->color.red;
3392 colbg.green = ~bg->color.green;
3393 colbg.blue = ~bg->color.blue;
3394 colbg.alpha = bg->color.alpha;
3395 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
3396 &revbg);
3397 bg = &revbg;
3398 }
3399 }
3400
3401 if(base.mode & ATTR_REVERSE) {
3402 temp = fg;
3403 fg = bg;
3404 bg = temp;
3405 }
3406
3407 if(base.mode & ATTR_FAINT && !(base.mode & ATTR_BOLD)) {
3408 colfg.red = fg->color.red / 2;
3409 colfg.green = fg->color.green / 2;
3410 colfg.blue = fg->color.blue / 2;
3411 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
3412 fg = &revfg;
3413 }
3414
3415 if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
3416 fg = bg;
3417
3418 if(base.mode & ATTR_INVISIBLE)
3419 fg = bg;
3420
3421 /* Intelligent cleaning up of the borders. */
3422 if(x == 0) {
3423 xclear(0, (y == 0)? 0 : winy, borderpx,
3424 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
3425 }
3426 if(x + charlen >= term.col) {
3427 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
3428 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
3429 }
3430 if(y == 0)
3431 xclear(winx, 0, winx + width, borderpx);
3432 if(y == term.row-1)
3433 xclear(winx, winy + xw.ch, winx + width, xw.h);
3434
3435 /* Clean up the region we want to draw to. */
3436 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
3437
3438 /* Set the clip region because Xft is sometimes dirty. */
3439 r.x = 0;
3440 r.y = 0;
3441 r.height = xw.ch;
3442 r.width = width;
3443 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
3444
3445 for(xp = winx; bytelen > 0;) {
3446 /*
3447 * Search for the range in the to be printed string of glyphs
3448 * that are in the main font. Then print that range. If
3449 * some glyph is found that is not in the font, do the
3450 * fallback dance.
3451 */
3452 u8fs = s;
3453 u8fblen = 0;
3454 u8fl = 0;
3455 oneatatime = font->width != xw.cw;
3456 for(;;) {
3457 u8c = s;
3458 u8cblen = utf8decode(s, &unicodep, UTF_SIZ);
3459 s += u8cblen;
3460 bytelen -= u8cblen;
3461
3462 doesexist = XftCharExists(xw.dpy, font->match, unicodep);
3463 if(doesexist) {
3464 u8fl++;
3465 u8fblen += u8cblen;
3466 if(!oneatatime && bytelen > 0)
3467 continue;
3468 }
3469
3470 if(u8fl > 0) {
3471 XftDrawStringUtf8(xw.draw, fg,
3472 font->match, xp,
3473 winy + font->ascent,
3474 (FcChar8 *)u8fs,
3475 u8fblen);
3476 xp += xw.cw * u8fl;
3477 }
3478 break;
3479 }
3480 if(doesexist) {
3481 if(oneatatime)
3482 continue;
3483 break;
3484 }
3485
3486 /* Search the font cache. */
3487 for(i = 0; i < frclen; i++) {
3488 charexists = XftCharExists(xw.dpy, frc[i].font, unicodep);
3489 /* Everything correct. */
3490 if(charexists && frc[i].flags == frcflags)
3491 break;
3492 /* We got a default font for a not found glyph. */
3493 if(!charexists && frc[i].flags == frcflags \
3494 && frc[i].unicodep == unicodep) {
3495 break;
3496 }
3497 }
3498
3499 /* Nothing was found. */
3500 if(i >= frclen) {
3501 if(!font->set)
3502 font->set = FcFontSort(0, font->pattern,
3503 FcTrue, 0, &fcres);
3504 fcsets[0] = font->set;
3505
3506 /*
3507 * Nothing was found in the cache. Now use
3508 * some dozen of Fontconfig calls to get the
3509 * font for one single character.
3510 *
3511 * Xft and fontconfig are design failures.
3512 */
3513 fcpattern = FcPatternDuplicate(font->pattern);
3514 fccharset = FcCharSetCreate();
3515
3516 FcCharSetAddChar(fccharset, unicodep);
3517 FcPatternAddCharSet(fcpattern, FC_CHARSET,
3518 fccharset);
3519 FcPatternAddBool(fcpattern, FC_SCALABLE,
3520 FcTrue);
3521
3522 FcConfigSubstitute(0, fcpattern,
3523 FcMatchPattern);
3524 FcDefaultSubstitute(fcpattern);
3525
3526 fontpattern = FcFontSetMatch(0, fcsets, 1,
3527 fcpattern, &fcres);
3528
3529 /*
3530 * Overwrite or create the new cache entry.
3531 */
3532 if(frclen >= LEN(frc)) {
3533 frclen = LEN(frc) - 1;
3534 XftFontClose(xw.dpy, frc[frclen].font);
3535 frc[frclen].unicodep = 0;
3536 }
3537
3538 frc[frclen].font = XftFontOpenPattern(xw.dpy,
3539 fontpattern);
3540 frc[frclen].flags = frcflags;
3541 frc[frclen].unicodep = unicodep;
3542
3543 i = frclen;
3544 frclen++;
3545
3546 FcPatternDestroy(fcpattern);
3547 FcCharSetDestroy(fccharset);
3548 }
3549
3550 XftDrawStringUtf8(xw.draw, fg, frc[i].font,
3551 xp, winy + frc[i].font->ascent,
3552 (FcChar8 *)u8c, u8cblen);
3553
3554 xp += xw.cw * wcwidth(unicodep);
3555 }
3556
3557 /*
3558 * This is how the loop above actually should be. Why does the
3559 * application have to care about font details?
3560 *
3561 * I have to repeat: Xft and Fontconfig are design failures.
3562 */
3563 /*
3564 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
3565 winy + font->ascent, (FcChar8 *)s, bytelen);
3566 */
3567
3568 if(base.mode & ATTR_UNDERLINE) {
3569 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
3570 width, 1);
3571 }
3572
3573 if(base.mode & ATTR_STRUCK) {
3574 XftDrawRect(xw.draw, fg, winx, winy + 2 * font->ascent / 3,
3575 width, 1);
3576 }
3577
3578 /* Reset clip to none. */
3579 XftDrawSetClip(xw.draw, 0);
3580 }
3581
3582 void
3583 xdrawcursor(void) {
3584 static int oldx = 0, oldy = 0;
3585 int sl, width, curx;
3586 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
3587
3588 LIMIT(oldx, 0, term.col-1);
3589 LIMIT(oldy, 0, term.row-1);
3590
3591 curx = term.c.x;
3592
3593 /* adjust position if in dummy */
3594 if(term.line[oldy][oldx].mode & ATTR_WDUMMY)
3595 oldx--;
3596 if(term.line[term.c.y][curx].mode & ATTR_WDUMMY)
3597 curx--;
3598
3599 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
3600
3601 /* remove the old cursor */
3602 sl = utf8len(term.line[oldy][oldx].c);
3603 width = (term.line[oldy][oldx].mode & ATTR_WIDE)? 2 : 1;
3604 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
3605 oldy, width, sl);
3606
3607 if(IS_SET(MODE_HIDE))
3608 return;
3609
3610 /* draw the new one */
3611 if(xw.state & WIN_FOCUSED) {
3612 switch (xw.cursor) {
3613 case 0: /* Blinking Block */
3614 case 1: /* Blinking Block (Default) */
3615 case 2: /* Steady Block */
3616 if(IS_SET(MODE_REVERSE)) {
3617 g.mode |= ATTR_REVERSE;
3618 g.fg = defaultcs;
3619 g.bg = defaultfg;
3620 }
3621
3622 sl = utf8len(g.c);
3623 width = (term.line[term.c.y][curx].mode & ATTR_WIDE)\
3624 ? 2 : 1;
3625 xdraws(g.c, g, term.c.x, term.c.y, width, sl);
3626 break;
3627 case 3: /* Blinking Underline */
3628 case 4: /* Steady Underline */
3629 XftDrawRect(xw.draw, &dc.col[defaultcs],
3630 borderpx + curx * xw.cw,
3631 borderpx + (term.c.y + 1) * xw.ch - cursorthickness,
3632 xw.cw, cursorthickness);
3633 break;
3634 case 5: /* Blinking bar */
3635 case 6: /* Steady bar */
3636 XftDrawRect(xw.draw, &dc.col[defaultcs],
3637 borderpx + curx * xw.cw,
3638 borderpx + term.c.y * xw.ch,
3639 cursorthickness, xw.ch);
3640 break;
3641 }
3642 } else {
3643 XftDrawRect(xw.draw, &dc.col[defaultcs],
3644 borderpx + curx * xw.cw,
3645 borderpx + term.c.y * xw.ch,
3646 xw.cw - 1, 1);
3647 XftDrawRect(xw.draw, &dc.col[defaultcs],
3648 borderpx + curx * xw.cw,
3649 borderpx + term.c.y * xw.ch,
3650 1, xw.ch - 1);
3651 XftDrawRect(xw.draw, &dc.col[defaultcs],
3652 borderpx + (curx + 1) * xw.cw - 1,
3653 borderpx + term.c.y * xw.ch,
3654 1, xw.ch - 1);
3655 XftDrawRect(xw.draw, &dc.col[defaultcs],
3656 borderpx + curx * xw.cw,
3657 borderpx + (term.c.y + 1) * xw.ch - 1,
3658 xw.cw, 1);
3659 }
3660 oldx = curx, oldy = term.c.y;
3661 }
3662
3663
3664 void
3665 xsettitle(char *p) {
3666 XTextProperty prop;
3667
3668 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3669 &prop);
3670 XSetWMName(xw.dpy, xw.win, &prop);
3671 XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
3672 XFree(prop.value);
3673 }
3674
3675 void
3676 xresettitle(void) {
3677 xsettitle(opt_title ? opt_title : "st");
3678 }
3679
3680 void
3681 redraw(void) {
3682 tfulldirt();
3683 draw();
3684 }
3685
3686 void
3687 draw(void) {
3688 drawregion(0, 0, term.col, term.row);
3689 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3690 xw.h, 0, 0);
3691 XSetForeground(xw.dpy, dc.gc,
3692 dc.col[IS_SET(MODE_REVERSE)?
3693 defaultfg : defaultbg].pixel);
3694 }
3695
3696 void
3697 drawregion(int x1, int y1, int x2, int y2) {
3698 int ic, ib, x, y, ox, sl;
3699 Glyph base, new;
3700 char buf[DRAW_BUF_SIZ];
3701 bool ena_sel = sel.ob.x != -1 && sel.alt == IS_SET(MODE_ALTSCREEN);
3702 long unicodep;
3703
3704 if(!(xw.state & WIN_VISIBLE))
3705 return;
3706
3707 for(y = y1; y < y2; y++) {
3708 if(!term.dirty[y])
3709 continue;
3710
3711 xtermclear(0, y, term.col, y);
3712 term.dirty[y] = 0;
3713 base = term.line[y][0];
3714 ic = ib = ox = 0;
3715 for(x = x1; x < x2; x++) {
3716 new = term.line[y][x];
3717 if(new.mode == ATTR_WDUMMY)
3718 continue;
3719 if(ena_sel && selected(x, y))
3720 new.mode ^= ATTR_REVERSE;
3721 if(ib > 0 && (ATTRCMP(base, new)
3722 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3723 xdraws(buf, base, ox, y, ic, ib);
3724 ic = ib = 0;
3725 }
3726 if(ib == 0) {
3727 ox = x;
3728 base = new;
3729 }
3730
3731 sl = utf8decode(new.c, &unicodep, UTF_SIZ);
3732 memcpy(buf+ib, new.c, sl);
3733 ib += sl;
3734 ic += (new.mode & ATTR_WIDE)? 2 : 1;
3735 }
3736 if(ib > 0)
3737 xdraws(buf, base, ox, y, ic, ib);
3738 }
3739 xdrawcursor();
3740 }
3741
3742 void
3743 expose(XEvent *ev) {
3744 XExposeEvent *e = &ev->xexpose;
3745
3746 if(xw.state & WIN_REDRAW) {
3747 if(!e->count)
3748 xw.state &= ~WIN_REDRAW;
3749 }
3750 redraw();
3751 }
3752
3753 void
3754 visibility(XEvent *ev) {
3755 XVisibilityEvent *e = &ev->xvisibility;
3756
3757 if(e->state == VisibilityFullyObscured) {
3758 xw.state &= ~WIN_VISIBLE;
3759 } else if(!(xw.state & WIN_VISIBLE)) {
3760 /* need a full redraw for next Expose, not just a buf copy */
3761 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3762 }
3763 }
3764
3765 void
3766 unmap(XEvent *ev) {
3767 xw.state &= ~WIN_VISIBLE;
3768 }
3769
3770 void
3771 xsetpointermotion(int set) {
3772 MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
3773 XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
3774 }
3775
3776 void
3777 xseturgency(int add) {
3778 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3779
3780 MODBIT(h->flags, add, XUrgencyHint);
3781 XSetWMHints(xw.dpy, xw.win, h);
3782 XFree(h);
3783 }
3784
3785 void
3786 focus(XEvent *ev) {
3787 XFocusChangeEvent *e = &ev->xfocus;
3788
3789 if(e->mode == NotifyGrab)
3790 return;
3791
3792 if(ev->type == FocusIn) {
3793 XSetICFocus(xw.xic);
3794 xw.state |= WIN_FOCUSED;
3795 xseturgency(0);
3796 if(IS_SET(MODE_FOCUS))
3797 ttywrite("\033[I", 3);
3798 } else {
3799 XUnsetICFocus(xw.xic);
3800 xw.state &= ~WIN_FOCUSED;
3801 if(IS_SET(MODE_FOCUS))
3802 ttywrite("\033[O", 3);
3803 }
3804 }
3805
3806 bool
3807 match(uint mask, uint state) {
3808 return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
3809 }
3810
3811 void
3812 numlock(const Arg *dummy) {
3813 term.numlock ^= 1;
3814 }
3815
3816 char*
3817 kmap(KeySym k, uint state) {
3818 Key *kp;
3819 int i;
3820
3821 /* Check for mapped keys out of X11 function keys. */
3822 for(i = 0; i < LEN(mappedkeys); i++) {
3823 if(mappedkeys[i] == k)
3824 break;
3825 }
3826 if(i == LEN(mappedkeys)) {
3827 if((k & 0xFFFF) < 0xFD00)
3828 return NULL;
3829 }
3830
3831 for(kp = key; kp < key + LEN(key); kp++) {
3832 if(kp->k != k)
3833 continue;
3834
3835 if(!match(kp->mask, state))
3836 continue;
3837
3838 if(IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
3839 continue;
3840 if(term.numlock && kp->appkey == 2)
3841 continue;
3842
3843 if(IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
3844 continue;
3845
3846 if(IS_SET(MODE_CRLF) ? kp->crlf < 0 : kp->crlf > 0)
3847 continue;
3848
3849 return kp->s;
3850 }
3851
3852 return NULL;
3853 }
3854
3855 void
3856 kpress(XEvent *ev) {
3857 XKeyEvent *e = &ev->xkey;
3858 KeySym ksym;
3859 char buf[32], *customkey;
3860 int len;
3861 long c;
3862 Status status;
3863 Shortcut *bp;
3864
3865 if(IS_SET(MODE_KBDLOCK))
3866 return;
3867
3868 len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
3869 /* 1. shortcuts */
3870 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3871 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3872 bp->func(&(bp->arg));
3873 return;
3874 }
3875 }
3876
3877 /* 2. custom keys from config.h */
3878 if((customkey = kmap(ksym, e->state))) {
3879 ttysend(customkey, strlen(customkey));
3880 return;
3881 }
3882
3883 /* 3. composed string from input method */
3884 if(len == 0)
3885 return;
3886 if(len == 1 && e->state & Mod1Mask) {
3887 if(IS_SET(MODE_8BIT)) {
3888 if(*buf < 0177) {
3889 c = *buf | 0x80;
3890 len = utf8encode(c, buf, UTF_SIZ);
3891 }
3892 } else {
3893 buf[1] = buf[0];
3894 buf[0] = '\033';
3895 len = 2;
3896 }
3897 }
3898 ttysend(buf, len);
3899 }
3900
3901
3902 void
3903 cmessage(XEvent *e) {
3904 /*
3905 * See xembed specs
3906 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3907 */
3908 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3909 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3910 xw.state |= WIN_FOCUSED;
3911 xseturgency(0);
3912 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3913 xw.state &= ~WIN_FOCUSED;
3914 }
3915 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3916 /* Send SIGHUP to shell */
3917 kill(pid, SIGHUP);
3918 exit(EXIT_SUCCESS);
3919 }
3920 }
3921
3922 void
3923 cresize(int width, int height) {
3924 int col, row;
3925
3926 if(width != 0)
3927 xw.w = width;
3928 if(height != 0)
3929 xw.h = height;
3930
3931 col = (xw.w - 2 * borderpx) / xw.cw;
3932 row = (xw.h - 2 * borderpx) / xw.ch;
3933
3934 tresize(col, row);
3935 xresize(col, row);
3936 ttyresize();
3937 }
3938
3939 void
3940 resize(XEvent *e) {
3941 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3942 return;
3943
3944 cresize(e->xconfigure.width, e->xconfigure.height);
3945 }
3946
3947 void
3948 run(void) {
3949 XEvent ev;
3950 int w = xw.w, h = xw.h;
3951 fd_set rfd;
3952 int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3953 struct timespec drawtimeout, *tv = NULL, now, last, lastblink;
3954 long deltatime;
3955
3956 /* Waiting for window mapping */
3957 do {
3958 XNextEvent(xw.dpy, &ev);
3959 if(ev.type == ConfigureNotify) {
3960 w = ev.xconfigure.width;
3961 h = ev.xconfigure.height;
3962 }
3963 } while(ev.type != MapNotify);
3964
3965 ttynew();
3966 cresize(w, h);
3967
3968 clock_gettime(CLOCK_MONOTONIC, &last);
3969 lastblink = last;
3970
3971 for(xev = actionfps;;) {
3972 FD_ZERO(&rfd);
3973 FD_SET(cmdfd, &rfd);
3974 FD_SET(xfd, &rfd);
3975
3976 if(pselect(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv, NULL) < 0) {
3977 if(errno == EINTR)
3978 continue;
3979 die("select failed: %s\n", strerror(errno));
3980 }
3981 if(FD_ISSET(cmdfd, &rfd)) {
3982 ttyread();
3983 if(blinktimeout) {
3984 blinkset = tattrset(ATTR_BLINK);
3985 if(!blinkset)
3986 MODBIT(term.mode, 0, MODE_BLINK);
3987 }
3988 }
3989
3990 if(FD_ISSET(xfd, &rfd))
3991 xev = actionfps;
3992
3993 clock_gettime(CLOCK_MONOTONIC, &now);
3994 drawtimeout.tv_sec = 0;
3995 drawtimeout.tv_nsec = (1000/xfps) * 1E6;
3996 tv = &drawtimeout;
3997
3998 dodraw = 0;
3999 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
4000 tsetdirtattr(ATTR_BLINK);
4001 term.mode ^= MODE_BLINK;
4002 lastblink = now;
4003 dodraw = 1;
4004 }
4005 deltatime = TIMEDIFF(now, last);
4006 if(deltatime > 1000 / (xev ? xfps : actionfps)) {
4007 dodraw = 1;
4008 last = now;
4009 }
4010
4011 if(dodraw) {
4012 while(XPending(xw.dpy)) {
4013 XNextEvent(xw.dpy, &ev);
4014 if(XFilterEvent(&ev, None))
4015 continue;
4016 if(handler[ev.type])
4017 (handler[ev.type])(&ev);
4018 }
4019
4020 draw();
4021 XFlush(xw.dpy);
4022
4023 if(xev && !FD_ISSET(xfd, &rfd))
4024 xev--;
4025 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
4026 if(blinkset) {
4027 if(TIMEDIFF(now, lastblink) \
4028 > blinktimeout) {
4029 drawtimeout.tv_nsec = 1000;
4030 } else {
4031 drawtimeout.tv_nsec = (1E6 * \
4032 (blinktimeout - \
4033 TIMEDIFF(now,
4034 lastblink)));
4035 }
4036 drawtimeout.tv_sec = \
4037 drawtimeout.tv_nsec / 1E9;
4038 drawtimeout.tv_nsec %= (long)1E9;
4039 } else {
4040 tv = NULL;
4041 }
4042 }
4043 }
4044 }
4045 }
4046
4047 void
4048 usage(void) {
4049 die("%s " VERSION " (c) 2010-2015 st engineers\n"
4050 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]\n"
4051 " [-i] [-t title] [-w windowid] [-e command ...] [command ...]\n"
4052 " st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]\n"
4053 " [-i] [-t title] [-w windowid] [-l line] [stty_args ...]\n",
4054 argv0);
4055 }
4056
4057 int
4058 main(int argc, char *argv[]) {
4059 uint cols = 80, rows = 24;
4060
4061 xw.l = xw.t = 0;
4062 xw.isfixed = False;
4063 xw.cursor = 0;
4064
4065 ARGBEGIN {
4066 case 'a':
4067 allowaltscreen = false;
4068 break;
4069 case 'c':
4070 opt_class = EARGF(usage());
4071 break;
4072 case 'e':
4073 if(argc > 1)
4074 --argc, ++argv;
4075 goto run;
4076 case 'f':
4077 opt_font = EARGF(usage());
4078 break;
4079 case 'g':
4080 xw.gm = XParseGeometry(EARGF(usage()),
4081 &xw.l, &xw.t, &cols, &rows);
4082 break;
4083 case 'i':
4084 xw.isfixed = True;
4085 break;
4086 case 'o':
4087 opt_io = EARGF(usage());
4088 break;
4089 case 'l':
4090 opt_line = EARGF(usage());
4091 break;
4092 case 't':
4093 opt_title = EARGF(usage());
4094 break;
4095 case 'w':
4096 opt_embed = EARGF(usage());
4097 break;
4098 case 'v':
4099 default:
4100 usage();
4101 } ARGEND;
4102
4103 run:
4104 if(argc > 0) {
4105 /* eat all remaining arguments */
4106 opt_cmd = argv;
4107 if(!opt_title)
4108 opt_title = basename(xstrdup(argv[0]));
4109 }
4110 setlocale(LC_CTYPE, "");
4111 XSetLocaleModifiers("");
4112 tnew(MAX(cols, 1), MAX(rows, 1));
4113 xinit();
4114 selinit();
4115 run();
4116
4117 return 0;
4118 }
4119