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2788746e3b859882db2964208a127789715534f4
[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 ISDELIM(u) (BETWEEN(u, 0, 127) && strchr(worddelimiters, u) != NULL)
76 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
77 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
78 #define IS_SET(flag) ((term.mode & (flag)) != 0)
79 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_nsec-t2.tv_nsec)/1E6)
80 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
81
82 #define TRUECOLOR(r,g,b) (1 << 24 | (r) << 16 | (g) << 8 | (b))
83 #define IS_TRUECOL(x) (1 << 24 & (x))
84 #define TRUERED(x) (((x) & 0xff0000) >> 8)
85 #define TRUEGREEN(x) (((x) & 0xff00))
86 #define TRUEBLUE(x) (((x) & 0xff) << 8)
87
88
89 enum glyph_attribute {
90 ATTR_NULL = 0,
91 ATTR_BOLD = 1 << 0,
92 ATTR_FAINT = 1 << 1,
93 ATTR_ITALIC = 1 << 2,
94 ATTR_UNDERLINE = 1 << 3,
95 ATTR_BLINK = 1 << 4,
96 ATTR_REVERSE = 1 << 5,
97 ATTR_INVISIBLE = 1 << 6,
98 ATTR_STRUCK = 1 << 7,
99 ATTR_WRAP = 1 << 8,
100 ATTR_WIDE = 1 << 9,
101 ATTR_WDUMMY = 1 << 10,
102 };
103
104 enum cursor_movement {
105 CURSOR_SAVE,
106 CURSOR_LOAD
107 };
108
109 enum cursor_state {
110 CURSOR_DEFAULT = 0,
111 CURSOR_WRAPNEXT = 1,
112 CURSOR_ORIGIN = 2
113 };
114
115 enum term_mode {
116 MODE_WRAP = 1 << 0,
117 MODE_INSERT = 1 << 1,
118 MODE_APPKEYPAD = 1 << 2,
119 MODE_ALTSCREEN = 1 << 3,
120 MODE_CRLF = 1 << 4,
121 MODE_MOUSEBTN = 1 << 5,
122 MODE_MOUSEMOTION = 1 << 6,
123 MODE_REVERSE = 1 << 7,
124 MODE_KBDLOCK = 1 << 8,
125 MODE_HIDE = 1 << 9,
126 MODE_ECHO = 1 << 10,
127 MODE_APPCURSOR = 1 << 11,
128 MODE_MOUSESGR = 1 << 12,
129 MODE_8BIT = 1 << 13,
130 MODE_BLINK = 1 << 14,
131 MODE_FBLINK = 1 << 15,
132 MODE_FOCUS = 1 << 16,
133 MODE_MOUSEX10 = 1 << 17,
134 MODE_MOUSEMANY = 1 << 18,
135 MODE_BRCKTPASTE = 1 << 19,
136 MODE_PRINT = 1 << 20,
137 MODE_MOUSE = MODE_MOUSEBTN|MODE_MOUSEMOTION|MODE_MOUSEX10\
138 |MODE_MOUSEMANY,
139 };
140
141 enum charset {
142 CS_GRAPHIC0,
143 CS_GRAPHIC1,
144 CS_UK,
145 CS_USA,
146 CS_MULTI,
147 CS_GER,
148 CS_FIN
149 };
150
151 enum escape_state {
152 ESC_START = 1,
153 ESC_CSI = 2,
154 ESC_STR = 4, /* DCS, OSC, PM, APC */
155 ESC_ALTCHARSET = 8,
156 ESC_STR_END = 16, /* a final string was encountered */
157 ESC_TEST = 32, /* Enter in test mode */
158 };
159
160 enum window_state {
161 WIN_VISIBLE = 1,
162 WIN_FOCUSED = 2
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 long u; /* 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 xdrawglyph(Glyph, int, int);
415 static void xhints(void);
416 static void xclear(int, int, int, int);
417 static void xdrawcursor(void);
418 static void xinit(void);
419 static void xloadcols(void);
420 static int xsetcolorname(int, const char *);
421 static int xgeommasktogravity(int);
422 static int xloadfont(Font *, FcPattern *);
423 static void xloadfonts(char *, double);
424 static void xsettitle(char *);
425 static void xresettitle(void);
426 static void xsetpointermotion(int);
427 static void xseturgency(int);
428 static void xsetsel(char *, Time);
429 static void xtermclear(int, int, int, int);
430 static void xunloadfont(Font *);
431 static void xunloadfonts(void);
432 static void xresize(int, int);
433
434 static void expose(XEvent *);
435 static void visibility(XEvent *);
436 static void unmap(XEvent *);
437 static char *kmap(KeySym, uint);
438 static void kpress(XEvent *);
439 static void cmessage(XEvent *);
440 static void cresize(int, int);
441 static void resize(XEvent *);
442 static void focus(XEvent *);
443 static void brelease(XEvent *);
444 static void bpress(XEvent *);
445 static void bmotion(XEvent *);
446 static void selnotify(XEvent *);
447 static void selclear(XEvent *);
448 static void selrequest(XEvent *);
449
450 static void selinit(void);
451 static void selnormalize(void);
452 static inline bool selected(int, int);
453 static char *getsel(void);
454 static void selcopy(Time);
455 static void selscroll(int, int);
456 static void selsnap(int, int *, int *, int);
457 static int x2col(int);
458 static int y2row(int);
459 static void getbuttoninfo(XEvent *);
460 static void mousereport(XEvent *);
461
462 static size_t utf8decode(char *, long *, size_t);
463 static long utf8decodebyte(char, size_t *);
464 static size_t utf8encode(long, char *);
465 static char utf8encodebyte(long, size_t);
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) {
615 size_t len, i;
616
617 len = utf8validate(&u, 0);
618 if(len > UTF_SIZ)
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 utf8validate(long *u, size_t i) {
635 if(!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF))
636 *u = UTF_INVALID;
637 for(i = 1; *u > utfmax[i]; ++i)
638 ;
639 return i;
640 }
641
642 void
643 selinit(void) {
644 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
645 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
646 sel.mode = 0;
647 sel.ob.x = -1;
648 sel.primary = NULL;
649 sel.clipboard = NULL;
650 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
651 if(sel.xtarget == None)
652 sel.xtarget = XA_STRING;
653 }
654
655 int
656 x2col(int x) {
657 x -= borderpx;
658 x /= xw.cw;
659
660 return LIMIT(x, 0, term.col-1);
661 }
662
663 int
664 y2row(int y) {
665 y -= borderpx;
666 y /= xw.ch;
667
668 return LIMIT(y, 0, term.row-1);
669 }
670
671 int
672 tlinelen(int y) {
673 int i = term.col;
674
675 if(term.line[y][i - 1].mode & ATTR_WRAP)
676 return i;
677
678 while(i > 0 && term.line[y][i - 1].u == ' ')
679 --i;
680
681 return i;
682 }
683
684 void
685 selnormalize(void) {
686 int i;
687
688 if(sel.ob.y == sel.oe.y || sel.type == SEL_RECTANGULAR) {
689 sel.nb.x = MIN(sel.ob.x, sel.oe.x);
690 sel.ne.x = MAX(sel.ob.x, sel.oe.x);
691 } else {
692 sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
693 sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
694 }
695 sel.nb.y = MIN(sel.ob.y, sel.oe.y);
696 sel.ne.y = MAX(sel.ob.y, sel.oe.y);
697
698 selsnap(sel.snap, &sel.nb.x, &sel.nb.y, -1);
699 selsnap(sel.snap, &sel.ne.x, &sel.ne.y, +1);
700
701 /* expand selection over line breaks */
702 if (sel.type == SEL_RECTANGULAR)
703 return;
704 i = tlinelen(sel.nb.y);
705 if (i < sel.nb.x)
706 sel.nb.x = i;
707 if (tlinelen(sel.ne.y) <= sel.ne.x)
708 sel.ne.x = term.col - 1;
709 }
710
711 bool
712 selected(int x, int y) {
713 if(sel.type == SEL_RECTANGULAR)
714 return BETWEEN(y, sel.nb.y, sel.ne.y)
715 && BETWEEN(x, sel.nb.x, sel.ne.x);
716
717 return BETWEEN(y, sel.nb.y, sel.ne.y)
718 && (y != sel.nb.y || x >= sel.nb.x)
719 && (y != sel.ne.y || x <= sel.ne.x);
720 }
721
722 void
723 selsnap(int mode, int *x, int *y, int direction) {
724 int newx, newy, xt, yt;
725 bool delim, prevdelim;
726 Glyph *gp, *prevgp;
727
728 switch(mode) {
729 case SNAP_WORD:
730 /*
731 * Snap around if the word wraps around at the end or
732 * beginning of a line.
733 */
734 prevgp = &term.line[*y][*x];
735 prevdelim = ISDELIM(prevgp->u);
736 for(;;) {
737 newx = *x + direction;
738 newy = *y;
739 if(!BETWEEN(newx, 0, term.col - 1)) {
740 newy += direction;
741 newx = (newx + term.col) % term.col;
742 if (!BETWEEN(newy, 0, term.row - 1))
743 break;
744
745 if(direction > 0)
746 yt = *y, xt = *x;
747 else
748 yt = newy, xt = newx;
749 if(!(term.line[yt][xt].mode & ATTR_WRAP))
750 break;
751 }
752
753 if (newx >= tlinelen(newy))
754 break;
755
756 gp = &term.line[newy][newx];
757 delim = ISDELIM(gp->u);
758 if(!(gp->mode & ATTR_WDUMMY) && (delim != prevdelim
759 || (delim && gp->u != prevgp->u)))
760 break;
761
762 *x = newx;
763 *y = newy;
764 prevgp = gp;
765 prevdelim = delim;
766 }
767 break;
768 case SNAP_LINE:
769 /*
770 * Snap around if the the previous line or the current one
771 * has set ATTR_WRAP at its end. Then the whole next or
772 * previous line will be selected.
773 */
774 *x = (direction < 0) ? 0 : term.col - 1;
775 if(direction < 0 && *y > 0) {
776 for(; *y > 0; *y += direction) {
777 if(!(term.line[*y-1][term.col-1].mode
778 & ATTR_WRAP)) {
779 break;
780 }
781 }
782 } else if(direction > 0 && *y < term.row-1) {
783 for(; *y < term.row; *y += direction) {
784 if(!(term.line[*y][term.col-1].mode
785 & ATTR_WRAP)) {
786 break;
787 }
788 }
789 }
790 break;
791 }
792 }
793
794 void
795 getbuttoninfo(XEvent *e) {
796 int type;
797 uint state = e->xbutton.state & ~(Button1Mask | forceselmod);
798
799 sel.alt = IS_SET(MODE_ALTSCREEN);
800
801 sel.oe.x = x2col(e->xbutton.x);
802 sel.oe.y = y2row(e->xbutton.y);
803 selnormalize();
804
805 sel.type = SEL_REGULAR;
806 for(type = 1; type < LEN(selmasks); ++type) {
807 if(match(selmasks[type], state)) {
808 sel.type = type;
809 break;
810 }
811 }
812 }
813
814 void
815 mousereport(XEvent *e) {
816 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
817 button = e->xbutton.button, state = e->xbutton.state,
818 len;
819 char buf[40];
820 static int ox, oy;
821
822 /* from urxvt */
823 if(e->xbutton.type == MotionNotify) {
824 if(x == ox && y == oy)
825 return;
826 if(!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
827 return;
828 /* MOUSE_MOTION: no reporting if no button is pressed */
829 if(IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
830 return;
831
832 button = oldbutton + 32;
833 ox = x;
834 oy = y;
835 } else {
836 if(!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
837 button = 3;
838 } else {
839 button -= Button1;
840 if(button >= 3)
841 button += 64 - 3;
842 }
843 if(e->xbutton.type == ButtonPress) {
844 oldbutton = button;
845 ox = x;
846 oy = y;
847 } else if(e->xbutton.type == ButtonRelease) {
848 oldbutton = 3;
849 /* MODE_MOUSEX10: no button release reporting */
850 if(IS_SET(MODE_MOUSEX10))
851 return;
852 if (button == 64 || button == 65)
853 return;
854 }
855 }
856
857 if(!IS_SET(MODE_MOUSEX10)) {
858 button += (state & ShiftMask ? 4 : 0)
859 + (state & Mod4Mask ? 8 : 0)
860 + (state & ControlMask ? 16 : 0);
861 }
862
863 len = 0;
864 if(IS_SET(MODE_MOUSESGR)) {
865 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
866 button, x+1, y+1,
867 e->xbutton.type == ButtonRelease ? 'm' : 'M');
868 } else if(x < 223 && y < 223) {
869 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
870 32+button, 32+x+1, 32+y+1);
871 } else {
872 return;
873 }
874
875 ttywrite(buf, len);
876 }
877
878 void
879 bpress(XEvent *e) {
880 struct timespec now;
881 Mousekey *mk;
882
883 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
884 mousereport(e);
885 return;
886 }
887
888 for(mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
889 if(e->xbutton.button == mk->b
890 && match(mk->mask, e->xbutton.state)) {
891 ttysend(mk->s, strlen(mk->s));
892 return;
893 }
894 }
895
896 if(e->xbutton.button == Button1) {
897 clock_gettime(CLOCK_MONOTONIC, &now);
898
899 /* Clear previous selection, logically and visually. */
900 selclear(NULL);
901 sel.mode = 1;
902 sel.type = SEL_REGULAR;
903 sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
904 sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
905
906 /*
907 * If the user clicks below predefined timeouts specific
908 * snapping behaviour is exposed.
909 */
910 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
911 sel.snap = SNAP_LINE;
912 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
913 sel.snap = SNAP_WORD;
914 } else {
915 sel.snap = 0;
916 }
917 selnormalize();
918
919 /*
920 * Draw selection, unless it's regular and we don't want to
921 * make clicks visible
922 */
923 if(sel.snap != 0) {
924 sel.mode++;
925 tsetdirt(sel.nb.y, sel.ne.y);
926 }
927 sel.tclick2 = sel.tclick1;
928 sel.tclick1 = now;
929 }
930 }
931
932 char *
933 getsel(void) {
934 char *str, *ptr;
935 int y, bufsize, lastx, linelen;
936 Glyph *gp, *last;
937
938 if(sel.ob.x == -1)
939 return NULL;
940
941 bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
942 ptr = str = xmalloc(bufsize);
943
944 /* append every set & selected glyph to the selection */
945 for(y = sel.nb.y; y <= sel.ne.y; y++) {
946 linelen = tlinelen(y);
947
948 if(sel.type == SEL_RECTANGULAR) {
949 gp = &term.line[y][sel.nb.x];
950 lastx = sel.ne.x;
951 } else {
952 gp = &term.line[y][sel.nb.y == y ? sel.nb.x : 0];
953 lastx = (sel.ne.y == y) ? sel.ne.x : term.col-1;
954 }
955 last = &term.line[y][MIN(lastx, linelen-1)];
956 while(last >= gp && last->u == ' ')
957 --last;
958
959 for( ; gp <= last; ++gp) {
960 if(gp->mode & ATTR_WDUMMY)
961 continue;
962
963 ptr += utf8encode(gp->u, ptr);
964 }
965
966 /*
967 * Copy and pasting of line endings is inconsistent
968 * in the inconsistent terminal and GUI world.
969 * The best solution seems like to produce '\n' when
970 * something is copied from st and convert '\n' to
971 * '\r', when something to be pasted is received by
972 * st.
973 * FIXME: Fix the computer world.
974 */
975 if((y < sel.ne.y || lastx >= linelen) && !(last->mode & ATTR_WRAP))
976 *ptr++ = '\n';
977 }
978 *ptr = 0;
979 return str;
980 }
981
982 void
983 selcopy(Time t) {
984 xsetsel(getsel(), t);
985 }
986
987 void
988 selnotify(XEvent *e) {
989 ulong nitems, ofs, rem;
990 int format;
991 uchar *data, *last, *repl;
992 Atom type;
993 XSelectionEvent *xsev;
994
995 ofs = 0;
996 xsev = &e->xselection;
997 if (xsev->property == None)
998 return;
999 do {
1000 if(XGetWindowProperty(xw.dpy, xw.win, xsev->property, ofs,
1001 BUFSIZ/4, False, AnyPropertyType,
1002 &type, &format, &nitems, &rem,
1003 &data)) {
1004 fprintf(stderr, "Clipboard allocation failed\n");
1005 return;
1006 }
1007
1008 /*
1009 * As seen in getsel:
1010 * Line endings are inconsistent in the terminal and GUI world
1011 * copy and pasting. When receiving some selection data,
1012 * replace all '\n' with '\r'.
1013 * FIXME: Fix the computer world.
1014 */
1015 repl = data;
1016 last = data + nitems * format / 8;
1017 while((repl = memchr(repl, '\n', last - repl))) {
1018 *repl++ = '\r';
1019 }
1020
1021 if(IS_SET(MODE_BRCKTPASTE))
1022 ttywrite("\033[200~", 6);
1023 ttysend((char *)data, nitems * format / 8);
1024 if(IS_SET(MODE_BRCKTPASTE))
1025 ttywrite("\033[201~", 6);
1026 XFree(data);
1027 /* number of 32-bit chunks returned */
1028 ofs += nitems * format / 32;
1029 } while(rem > 0);
1030 }
1031
1032 void
1033 selpaste(const Arg *dummy) {
1034 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
1035 xw.win, CurrentTime);
1036 }
1037
1038 void
1039 clipcopy(const Arg *dummy) {
1040 Atom clipboard;
1041
1042 if(sel.clipboard != NULL)
1043 free(sel.clipboard);
1044
1045 if(sel.primary != NULL) {
1046 sel.clipboard = xstrdup(sel.primary);
1047 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1048 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
1049 }
1050 }
1051
1052 void
1053 clippaste(const Arg *dummy) {
1054 Atom clipboard;
1055
1056 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1057 XConvertSelection(xw.dpy, clipboard, sel.xtarget, clipboard,
1058 xw.win, CurrentTime);
1059 }
1060
1061 void
1062 selclear(XEvent *e) {
1063 if(sel.ob.x == -1)
1064 return;
1065 sel.ob.x = -1;
1066 tsetdirt(sel.nb.y, sel.ne.y);
1067 }
1068
1069 void
1070 selrequest(XEvent *e) {
1071 XSelectionRequestEvent *xsre;
1072 XSelectionEvent xev;
1073 Atom xa_targets, string, clipboard;
1074 char *seltext;
1075
1076 xsre = (XSelectionRequestEvent *) e;
1077 xev.type = SelectionNotify;
1078 xev.requestor = xsre->requestor;
1079 xev.selection = xsre->selection;
1080 xev.target = xsre->target;
1081 xev.time = xsre->time;
1082 if (xsre->property == None)
1083 xsre->property = xsre->target;
1084
1085 /* reject */
1086 xev.property = None;
1087
1088 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
1089 if(xsre->target == xa_targets) {
1090 /* respond with the supported type */
1091 string = sel.xtarget;
1092 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1093 XA_ATOM, 32, PropModeReplace,
1094 (uchar *) &string, 1);
1095 xev.property = xsre->property;
1096 } else if(xsre->target == sel.xtarget || xsre->target == XA_STRING) {
1097 /*
1098 * xith XA_STRING non ascii characters may be incorrect in the
1099 * requestor. It is not our problem, use utf8.
1100 */
1101 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1102 if(xsre->selection == XA_PRIMARY) {
1103 seltext = sel.primary;
1104 } else if(xsre->selection == clipboard) {
1105 seltext = sel.clipboard;
1106 } else {
1107 fprintf(stderr,
1108 "Unhandled clipboard selection 0x%lx\n",
1109 xsre->selection);
1110 return;
1111 }
1112 if(seltext != NULL) {
1113 XChangeProperty(xsre->display, xsre->requestor,
1114 xsre->property, xsre->target,
1115 8, PropModeReplace,
1116 (uchar *)seltext, strlen(seltext));
1117 xev.property = xsre->property;
1118 }
1119 }
1120
1121 /* all done, send a notification to the listener */
1122 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
1123 fprintf(stderr, "Error sending SelectionNotify event\n");
1124 }
1125
1126 void
1127 xsetsel(char *str, Time t) {
1128 free(sel.primary);
1129 sel.primary = str;
1130
1131 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, t);
1132 if (XGetSelectionOwner(xw.dpy, XA_PRIMARY) != xw.win)
1133 selclear(0);
1134 }
1135
1136 void
1137 brelease(XEvent *e) {
1138 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1139 mousereport(e);
1140 return;
1141 }
1142
1143 if(e->xbutton.button == Button2) {
1144 selpaste(NULL);
1145 } else if(e->xbutton.button == Button1) {
1146 if(sel.mode < 2) {
1147 selclear(NULL);
1148 } else {
1149 getbuttoninfo(e);
1150 selcopy(e->xbutton.time);
1151 }
1152 sel.mode = 0;
1153 tsetdirt(sel.nb.y, sel.ne.y);
1154 }
1155 }
1156
1157 void
1158 bmotion(XEvent *e) {
1159 int oldey, oldex, oldsby, oldsey;
1160
1161 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1162 mousereport(e);
1163 return;
1164 }
1165
1166 if(!sel.mode)
1167 return;
1168
1169 sel.mode++;
1170 oldey = sel.oe.y;
1171 oldex = sel.oe.x;
1172 oldsby = sel.nb.y;
1173 oldsey = sel.ne.y;
1174 getbuttoninfo(e);
1175
1176 if(oldey != sel.oe.y || oldex != sel.oe.x)
1177 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
1178 }
1179
1180 void
1181 die(const char *errstr, ...) {
1182 va_list ap;
1183
1184 va_start(ap, errstr);
1185 vfprintf(stderr, errstr, ap);
1186 va_end(ap);
1187 exit(EXIT_FAILURE);
1188 }
1189
1190 void
1191 execsh(void) {
1192 char **args, *sh, *prog;
1193 const struct passwd *pw;
1194 char buf[sizeof(long) * 8 + 1];
1195
1196 errno = 0;
1197 if((pw = getpwuid(getuid())) == NULL) {
1198 if(errno)
1199 die("getpwuid:%s\n", strerror(errno));
1200 else
1201 die("who are you?\n");
1202 }
1203
1204 if (!(sh = getenv("SHELL"))) {
1205 sh = (pw->pw_shell[0]) ? pw->pw_shell : shell;
1206 }
1207
1208 if(opt_cmd)
1209 prog = opt_cmd[0];
1210 else if(utmp)
1211 prog = utmp;
1212 else
1213 prog = sh;
1214 args = (opt_cmd) ? opt_cmd : (char *[]) {prog, NULL};
1215
1216 snprintf(buf, sizeof(buf), "%lu", xw.win);
1217
1218 unsetenv("COLUMNS");
1219 unsetenv("LINES");
1220 unsetenv("TERMCAP");
1221 setenv("LOGNAME", pw->pw_name, 1);
1222 setenv("USER", pw->pw_name, 1);
1223 setenv("SHELL", sh, 1);
1224 setenv("HOME", pw->pw_dir, 1);
1225 setenv("TERM", termname, 1);
1226 setenv("WINDOWID", buf, 1);
1227
1228 signal(SIGCHLD, SIG_DFL);
1229 signal(SIGHUP, SIG_DFL);
1230 signal(SIGINT, SIG_DFL);
1231 signal(SIGQUIT, SIG_DFL);
1232 signal(SIGTERM, SIG_DFL);
1233 signal(SIGALRM, SIG_DFL);
1234
1235 execvp(prog, args);
1236 _exit(EXIT_FAILURE);
1237 }
1238
1239 void
1240 sigchld(int a) {
1241 int stat, ret;
1242
1243 if(waitpid(pid, &stat, 0) < 0)
1244 die("Waiting for pid %hd failed: %s\n", pid, strerror(errno));
1245
1246 ret = WIFEXITED(stat) ? WEXITSTATUS(stat) : EXIT_FAILURE;
1247 if (ret != EXIT_SUCCESS)
1248 die("child finished with error '%d'\n", stat);
1249 exit(EXIT_SUCCESS);
1250 }
1251
1252
1253 void
1254 stty(void)
1255 {
1256 char cmd[_POSIX_ARG_MAX], **p, *q, *s;
1257 size_t n, siz;
1258
1259 if((n = strlen(stty_args)) > sizeof(cmd)-1)
1260 die("incorrect stty parameters\n");
1261 memcpy(cmd, stty_args, n);
1262 q = cmd + n;
1263 siz = sizeof(cmd) - n;
1264 for(p = opt_cmd; p && (s = *p); ++p) {
1265 if((n = strlen(s)) > siz-1)
1266 die("stty parameter length too long\n");
1267 *q++ = ' ';
1268 q = memcpy(q, s, n);
1269 q += n;
1270 siz-= n + 1;
1271 }
1272 *q = '\0';
1273 if (system(cmd) != 0)
1274 perror("Couldn't call stty");
1275 }
1276
1277 void
1278 ttynew(void) {
1279 int m, s;
1280 struct winsize w = {term.row, term.col, 0, 0};
1281
1282 if(opt_io) {
1283 term.mode |= MODE_PRINT;
1284 iofd = (!strcmp(opt_io, "-")) ?
1285 STDOUT_FILENO :
1286 open(opt_io, O_WRONLY | O_CREAT, 0666);
1287 if(iofd < 0) {
1288 fprintf(stderr, "Error opening %s:%s\n",
1289 opt_io, strerror(errno));
1290 }
1291 }
1292
1293 if (opt_line) {
1294 if((cmdfd = open(opt_line, O_RDWR)) < 0)
1295 die("open line failed: %s\n", strerror(errno));
1296 close(STDIN_FILENO);
1297 dup(cmdfd);
1298 stty();
1299 return;
1300 }
1301
1302 /* seems to work fine on linux, openbsd and freebsd */
1303 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1304 die("openpty failed: %s\n", strerror(errno));
1305
1306 switch(pid = fork()) {
1307 case -1:
1308 die("fork failed\n");
1309 break;
1310 case 0:
1311 close(iofd);
1312 setsid(); /* create a new process group */
1313 dup2(s, STDIN_FILENO);
1314 dup2(s, STDOUT_FILENO);
1315 dup2(s, STDERR_FILENO);
1316 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1317 die("ioctl TIOCSCTTY failed: %s\n", strerror(errno));
1318 close(s);
1319 close(m);
1320 execsh();
1321 break;
1322 default:
1323 close(s);
1324 cmdfd = m;
1325 signal(SIGCHLD, sigchld);
1326 break;
1327 }
1328 }
1329
1330 void
1331 ttyread(void) {
1332 static char buf[BUFSIZ];
1333 static int buflen = 0;
1334 char *ptr;
1335 char s[UTF_SIZ];
1336 int charsize; /* size of utf8 char in bytes */
1337 long unicodep;
1338 int ret;
1339
1340 /* append read bytes to unprocessed bytes */
1341 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1342 die("Couldn't read from shell: %s\n", strerror(errno));
1343
1344 /* process every complete utf8 char */
1345 buflen += ret;
1346 ptr = buf;
1347 while((charsize = utf8decode(ptr, &unicodep, buflen))) {
1348 utf8encode(unicodep, s);
1349 tputc(s, charsize);
1350 ptr += charsize;
1351 buflen -= charsize;
1352 }
1353
1354 /* keep any uncomplete utf8 char for the next call */
1355 memmove(buf, ptr, buflen);
1356 }
1357
1358 void
1359 ttywrite(const char *s, size_t n) {
1360 if(xwrite(cmdfd, s, n) == -1)
1361 die("write error on tty: %s\n", strerror(errno));
1362 }
1363
1364 void
1365 ttysend(char *s, size_t n) {
1366 ttywrite(s, n);
1367 if(IS_SET(MODE_ECHO))
1368 techo(s, n);
1369 }
1370
1371 void
1372 ttyresize(void) {
1373 struct winsize w;
1374
1375 w.ws_row = term.row;
1376 w.ws_col = term.col;
1377 w.ws_xpixel = xw.tw;
1378 w.ws_ypixel = xw.th;
1379 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1380 fprintf(stderr, "Couldn't set window size: %s\n", strerror(errno));
1381 }
1382
1383 int
1384 tattrset(int attr) {
1385 int i, j;
1386
1387 for(i = 0; i < term.row-1; i++) {
1388 for(j = 0; j < term.col-1; j++) {
1389 if(term.line[i][j].mode & attr)
1390 return 1;
1391 }
1392 }
1393
1394 return 0;
1395 }
1396
1397 void
1398 tsetdirt(int top, int bot) {
1399 int i;
1400
1401 LIMIT(top, 0, term.row-1);
1402 LIMIT(bot, 0, term.row-1);
1403
1404 for(i = top; i <= bot; i++)
1405 term.dirty[i] = 1;
1406 }
1407
1408 void
1409 tsetdirtattr(int attr) {
1410 int i, j;
1411
1412 for(i = 0; i < term.row-1; i++) {
1413 for(j = 0; j < term.col-1; j++) {
1414 if(term.line[i][j].mode & attr) {
1415 tsetdirt(i, i);
1416 break;
1417 }
1418 }
1419 }
1420 }
1421
1422 void
1423 tfulldirt(void) {
1424 tsetdirt(0, term.row-1);
1425 }
1426
1427 void
1428 tcursor(int mode) {
1429 static TCursor c[2];
1430 bool alt = IS_SET(MODE_ALTSCREEN);
1431
1432 if(mode == CURSOR_SAVE) {
1433 c[alt] = term.c;
1434 } else if(mode == CURSOR_LOAD) {
1435 term.c = c[alt];
1436 tmoveto(c[alt].x, c[alt].y);
1437 }
1438 }
1439
1440 void
1441 treset(void) {
1442 uint i;
1443
1444 term.c = (TCursor){{
1445 .mode = ATTR_NULL,
1446 .fg = defaultfg,
1447 .bg = defaultbg
1448 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1449
1450 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1451 for(i = tabspaces; i < term.col; i += tabspaces)
1452 term.tabs[i] = 1;
1453 term.top = 0;
1454 term.bot = term.row - 1;
1455 term.mode = MODE_WRAP;
1456 memset(term.trantbl, CS_USA, sizeof(term.trantbl));
1457 term.charset = 0;
1458
1459 for(i = 0; i < 2; i++) {
1460 tmoveto(0, 0);
1461 tcursor(CURSOR_SAVE);
1462 tclearregion(0, 0, term.col-1, term.row-1);
1463 tswapscreen();
1464 }
1465 }
1466
1467 void
1468 tnew(int col, int row) {
1469 term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } };
1470 tresize(col, row);
1471 term.numlock = 1;
1472
1473 treset();
1474 }
1475
1476 void
1477 tswapscreen(void) {
1478 Line *tmp = term.line;
1479
1480 term.line = term.alt;
1481 term.alt = tmp;
1482 term.mode ^= MODE_ALTSCREEN;
1483 tfulldirt();
1484 }
1485
1486 void
1487 tscrolldown(int orig, int n) {
1488 int i;
1489 Line temp;
1490
1491 LIMIT(n, 0, term.bot-orig+1);
1492
1493 tsetdirt(orig, term.bot-n);
1494 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1495
1496 for(i = term.bot; i >= orig+n; i--) {
1497 temp = term.line[i];
1498 term.line[i] = term.line[i-n];
1499 term.line[i-n] = temp;
1500 }
1501
1502 selscroll(orig, n);
1503 }
1504
1505 void
1506 tscrollup(int orig, int n) {
1507 int i;
1508 Line temp;
1509
1510 LIMIT(n, 0, term.bot-orig+1);
1511
1512 tclearregion(0, orig, term.col-1, orig+n-1);
1513 tsetdirt(orig+n, term.bot);
1514
1515 for(i = orig; i <= term.bot-n; i++) {
1516 temp = term.line[i];
1517 term.line[i] = term.line[i+n];
1518 term.line[i+n] = temp;
1519 }
1520
1521 selscroll(orig, -n);
1522 }
1523
1524 void
1525 selscroll(int orig, int n) {
1526 if(sel.ob.x == -1)
1527 return;
1528
1529 if(BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
1530 if((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
1531 selclear(NULL);
1532 return;
1533 }
1534 if(sel.type == SEL_RECTANGULAR) {
1535 if(sel.ob.y < term.top)
1536 sel.ob.y = term.top;
1537 if(sel.oe.y > term.bot)
1538 sel.oe.y = term.bot;
1539 } else {
1540 if(sel.ob.y < term.top) {
1541 sel.ob.y = term.top;
1542 sel.ob.x = 0;
1543 }
1544 if(sel.oe.y > term.bot) {
1545 sel.oe.y = term.bot;
1546 sel.oe.x = term.col;
1547 }
1548 }
1549 selnormalize();
1550 }
1551 }
1552
1553 void
1554 tnewline(int first_col) {
1555 int y = term.c.y;
1556
1557 if(y == term.bot) {
1558 tscrollup(term.top, 1);
1559 } else {
1560 y++;
1561 }
1562 tmoveto(first_col ? 0 : term.c.x, y);
1563 }
1564
1565 void
1566 csiparse(void) {
1567 char *p = csiescseq.buf, *np;
1568 long int v;
1569
1570 csiescseq.narg = 0;
1571 if(*p == '?') {
1572 csiescseq.priv = 1;
1573 p++;
1574 }
1575
1576 csiescseq.buf[csiescseq.len] = '\0';
1577 while(p < csiescseq.buf+csiescseq.len) {
1578 np = NULL;
1579 v = strtol(p, &np, 10);
1580 if(np == p)
1581 v = 0;
1582 if(v == LONG_MAX || v == LONG_MIN)
1583 v = -1;
1584 csiescseq.arg[csiescseq.narg++] = v;
1585 p = np;
1586 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1587 break;
1588 p++;
1589 }
1590 csiescseq.mode[0] = *p++;
1591 csiescseq.mode[1] = (p < csiescseq.buf+csiescseq.len) ? *p : '\0';
1592 }
1593
1594 /* for absolute user moves, when decom is set */
1595 void
1596 tmoveato(int x, int y) {
1597 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1598 }
1599
1600 void
1601 tmoveto(int x, int y) {
1602 int miny, maxy;
1603
1604 if(term.c.state & CURSOR_ORIGIN) {
1605 miny = term.top;
1606 maxy = term.bot;
1607 } else {
1608 miny = 0;
1609 maxy = term.row - 1;
1610 }
1611 term.c.state &= ~CURSOR_WRAPNEXT;
1612 term.c.x = LIMIT(x, 0, term.col-1);
1613 term.c.y = LIMIT(y, miny, maxy);
1614 }
1615
1616 void
1617 tsetchar(char *c, Glyph *attr, int x, int y) {
1618 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1619 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1620 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1621 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1622 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1623 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1624 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1625 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1626 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1627 };
1628
1629 /*
1630 * The table is proudly stolen from rxvt.
1631 */
1632 if(term.trantbl[term.charset] == CS_GRAPHIC0) {
1633 if(BETWEEN(c[0], 0x41, 0x7e) && vt100_0[c[0] - 0x41]) {
1634 c = vt100_0[c[0] - 0x41];
1635 }
1636 }
1637
1638 if(term.line[y][x].mode & ATTR_WIDE) {
1639 if(x+1 < term.col) {
1640 term.line[y][x+1].u = ' ';
1641 term.line[y][x+1].mode &= ~ATTR_WDUMMY;
1642 }
1643 } else if(term.line[y][x].mode & ATTR_WDUMMY) {
1644 term.line[y][x-1].u = ' ';
1645 term.line[y][x-1].mode &= ~ATTR_WIDE;
1646 }
1647
1648 term.dirty[y] = 1;
1649 term.line[y][x] = *attr;
1650 utf8decode(c, &term.line[y][x].u, UTF_SIZ);
1651 }
1652
1653 void
1654 tclearregion(int x1, int y1, int x2, int y2) {
1655 int x, y, temp;
1656 Glyph *gp;
1657
1658 if(x1 > x2)
1659 temp = x1, x1 = x2, x2 = temp;
1660 if(y1 > y2)
1661 temp = y1, y1 = y2, y2 = temp;
1662
1663 LIMIT(x1, 0, term.col-1);
1664 LIMIT(x2, 0, term.col-1);
1665 LIMIT(y1, 0, term.row-1);
1666 LIMIT(y2, 0, term.row-1);
1667
1668 for(y = y1; y <= y2; y++) {
1669 term.dirty[y] = 1;
1670 for(x = x1; x <= x2; x++) {
1671 gp = &term.line[y][x];
1672 if(selected(x, y))
1673 selclear(NULL);
1674 gp->fg = term.c.attr.fg;
1675 gp->bg = term.c.attr.bg;
1676 gp->mode = 0;
1677 gp->u = ' ';
1678 }
1679 }
1680 }
1681
1682 void
1683 tdeletechar(int n) {
1684 int dst, src, size;
1685 Glyph *line;
1686
1687 LIMIT(n, 0, term.col - term.c.x);
1688
1689 dst = term.c.x;
1690 src = term.c.x + n;
1691 size = term.col - src;
1692 line = term.line[term.c.y];
1693
1694 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1695 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1696 }
1697
1698 void
1699 tinsertblank(int n) {
1700 int dst, src, size;
1701 Glyph *line;
1702
1703 LIMIT(n, 0, term.col - term.c.x);
1704
1705 dst = term.c.x + n;
1706 src = term.c.x;
1707 size = term.col - dst;
1708 line = term.line[term.c.y];
1709
1710 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1711 tclearregion(src, term.c.y, dst - 1, term.c.y);
1712 }
1713
1714 void
1715 tinsertblankline(int n) {
1716 if(BETWEEN(term.c.y, term.top, term.bot))
1717 tscrolldown(term.c.y, n);
1718 }
1719
1720 void
1721 tdeleteline(int n) {
1722 if(BETWEEN(term.c.y, term.top, term.bot))
1723 tscrollup(term.c.y, n);
1724 }
1725
1726 int32_t
1727 tdefcolor(int *attr, int *npar, int l) {
1728 int32_t idx = -1;
1729 uint r, g, b;
1730
1731 switch (attr[*npar + 1]) {
1732 case 2: /* direct color in RGB space */
1733 if (*npar + 4 >= l) {
1734 fprintf(stderr,
1735 "erresc(38): Incorrect number of parameters (%d)\n",
1736 *npar);
1737 break;
1738 }
1739 r = attr[*npar + 2];
1740 g = attr[*npar + 3];
1741 b = attr[*npar + 4];
1742 *npar += 4;
1743 if(!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
1744 fprintf(stderr, "erresc: bad rgb color (%d,%d,%d)\n",
1745 r, g, b);
1746 else
1747 idx = TRUECOLOR(r, g, b);
1748 break;
1749 case 5: /* indexed color */
1750 if (*npar + 2 >= l) {
1751 fprintf(stderr,
1752 "erresc(38): Incorrect number of parameters (%d)\n",
1753 *npar);
1754 break;
1755 }
1756 *npar += 2;
1757 if(!BETWEEN(attr[*npar], 0, 255))
1758 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
1759 else
1760 idx = attr[*npar];
1761 break;
1762 case 0: /* implemented defined (only foreground) */
1763 case 1: /* transparent */
1764 case 3: /* direct color in CMY space */
1765 case 4: /* direct color in CMYK space */
1766 default:
1767 fprintf(stderr,
1768 "erresc(38): gfx attr %d unknown\n", attr[*npar]);
1769 break;
1770 }
1771
1772 return idx;
1773 }
1774
1775 void
1776 tsetattr(int *attr, int l) {
1777 int i;
1778 int32_t idx;
1779
1780 for(i = 0; i < l; i++) {
1781 switch(attr[i]) {
1782 case 0:
1783 term.c.attr.mode &= ~(
1784 ATTR_BOLD |
1785 ATTR_FAINT |
1786 ATTR_ITALIC |
1787 ATTR_UNDERLINE |
1788 ATTR_BLINK |
1789 ATTR_REVERSE |
1790 ATTR_INVISIBLE |
1791 ATTR_STRUCK );
1792 term.c.attr.fg = defaultfg;
1793 term.c.attr.bg = defaultbg;
1794 break;
1795 case 1:
1796 term.c.attr.mode |= ATTR_BOLD;
1797 break;
1798 case 2:
1799 term.c.attr.mode |= ATTR_FAINT;
1800 break;
1801 case 3:
1802 term.c.attr.mode |= ATTR_ITALIC;
1803 break;
1804 case 4:
1805 term.c.attr.mode |= ATTR_UNDERLINE;
1806 break;
1807 case 5: /* slow blink */
1808 /* FALLTHROUGH */
1809 case 6: /* rapid blink */
1810 term.c.attr.mode |= ATTR_BLINK;
1811 break;
1812 case 7:
1813 term.c.attr.mode |= ATTR_REVERSE;
1814 break;
1815 case 8:
1816 term.c.attr.mode |= ATTR_INVISIBLE;
1817 break;
1818 case 9:
1819 term.c.attr.mode |= ATTR_STRUCK;
1820 break;
1821 case 22:
1822 term.c.attr.mode &= ~(ATTR_BOLD | ATTR_FAINT);
1823 break;
1824 case 23:
1825 term.c.attr.mode &= ~ATTR_ITALIC;
1826 break;
1827 case 24:
1828 term.c.attr.mode &= ~ATTR_UNDERLINE;
1829 break;
1830 case 25:
1831 term.c.attr.mode &= ~ATTR_BLINK;
1832 break;
1833 case 27:
1834 term.c.attr.mode &= ~ATTR_REVERSE;
1835 break;
1836 case 28:
1837 term.c.attr.mode &= ~ATTR_INVISIBLE;
1838 break;
1839 case 29:
1840 term.c.attr.mode &= ~ATTR_STRUCK;
1841 break;
1842 case 38:
1843 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1844 term.c.attr.fg = idx;
1845 break;
1846 case 39:
1847 term.c.attr.fg = defaultfg;
1848 break;
1849 case 48:
1850 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1851 term.c.attr.bg = idx;
1852 break;
1853 case 49:
1854 term.c.attr.bg = defaultbg;
1855 break;
1856 default:
1857 if(BETWEEN(attr[i], 30, 37)) {
1858 term.c.attr.fg = attr[i] - 30;
1859 } else if(BETWEEN(attr[i], 40, 47)) {
1860 term.c.attr.bg = attr[i] - 40;
1861 } else if(BETWEEN(attr[i], 90, 97)) {
1862 term.c.attr.fg = attr[i] - 90 + 8;
1863 } else if(BETWEEN(attr[i], 100, 107)) {
1864 term.c.attr.bg = attr[i] - 100 + 8;
1865 } else {
1866 fprintf(stderr,
1867 "erresc(default): gfx attr %d unknown\n",
1868 attr[i]), csidump();
1869 }
1870 break;
1871 }
1872 }
1873 }
1874
1875 void
1876 tsetscroll(int t, int b) {
1877 int temp;
1878
1879 LIMIT(t, 0, term.row-1);
1880 LIMIT(b, 0, term.row-1);
1881 if(t > b) {
1882 temp = t;
1883 t = b;
1884 b = temp;
1885 }
1886 term.top = t;
1887 term.bot = b;
1888 }
1889
1890 void
1891 tsetmode(bool priv, bool set, int *args, int narg) {
1892 int *lim, mode;
1893 bool alt;
1894
1895 for(lim = args + narg; args < lim; ++args) {
1896 if(priv) {
1897 switch(*args) {
1898 case 1: /* DECCKM -- Cursor key */
1899 MODBIT(term.mode, set, MODE_APPCURSOR);
1900 break;
1901 case 5: /* DECSCNM -- Reverse video */
1902 mode = term.mode;
1903 MODBIT(term.mode, set, MODE_REVERSE);
1904 if(mode != term.mode)
1905 redraw();
1906 break;
1907 case 6: /* DECOM -- Origin */
1908 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1909 tmoveato(0, 0);
1910 break;
1911 case 7: /* DECAWM -- Auto wrap */
1912 MODBIT(term.mode, set, MODE_WRAP);
1913 break;
1914 case 0: /* Error (IGNORED) */
1915 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1916 case 3: /* DECCOLM -- Column (IGNORED) */
1917 case 4: /* DECSCLM -- Scroll (IGNORED) */
1918 case 8: /* DECARM -- Auto repeat (IGNORED) */
1919 case 18: /* DECPFF -- Printer feed (IGNORED) */
1920 case 19: /* DECPEX -- Printer extent (IGNORED) */
1921 case 42: /* DECNRCM -- National characters (IGNORED) */
1922 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1923 break;
1924 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1925 MODBIT(term.mode, !set, MODE_HIDE);
1926 break;
1927 case 9: /* X10 mouse compatibility mode */
1928 xsetpointermotion(0);
1929 MODBIT(term.mode, 0, MODE_MOUSE);
1930 MODBIT(term.mode, set, MODE_MOUSEX10);
1931 break;
1932 case 1000: /* 1000: report button press */
1933 xsetpointermotion(0);
1934 MODBIT(term.mode, 0, MODE_MOUSE);
1935 MODBIT(term.mode, set, MODE_MOUSEBTN);
1936 break;
1937 case 1002: /* 1002: report motion on button press */
1938 xsetpointermotion(0);
1939 MODBIT(term.mode, 0, MODE_MOUSE);
1940 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1941 break;
1942 case 1003: /* 1003: enable all mouse motions */
1943 xsetpointermotion(set);
1944 MODBIT(term.mode, 0, MODE_MOUSE);
1945 MODBIT(term.mode, set, MODE_MOUSEMANY);
1946 break;
1947 case 1004: /* 1004: send focus events to tty */
1948 MODBIT(term.mode, set, MODE_FOCUS);
1949 break;
1950 case 1006: /* 1006: extended reporting mode */
1951 MODBIT(term.mode, set, MODE_MOUSESGR);
1952 break;
1953 case 1034:
1954 MODBIT(term.mode, set, MODE_8BIT);
1955 break;
1956 case 1049: /* swap screen & set/restore cursor as xterm */
1957 if (!allowaltscreen)
1958 break;
1959 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1960 /* FALLTHROUGH */
1961 case 47: /* swap screen */
1962 case 1047:
1963 if (!allowaltscreen)
1964 break;
1965 alt = IS_SET(MODE_ALTSCREEN);
1966 if(alt) {
1967 tclearregion(0, 0, term.col-1,
1968 term.row-1);
1969 }
1970 if(set ^ alt) /* set is always 1 or 0 */
1971 tswapscreen();
1972 if(*args != 1049)
1973 break;
1974 /* FALLTHROUGH */
1975 case 1048:
1976 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1977 break;
1978 case 2004: /* 2004: bracketed paste mode */
1979 MODBIT(term.mode, set, MODE_BRCKTPASTE);
1980 break;
1981 /* Not implemented mouse modes. See comments there. */
1982 case 1001: /* mouse highlight mode; can hang the
1983 terminal by design when implemented. */
1984 case 1005: /* UTF-8 mouse mode; will confuse
1985 applications not supporting UTF-8
1986 and luit. */
1987 case 1015: /* urxvt mangled mouse mode; incompatible
1988 and can be mistaken for other control
1989 codes. */
1990 default:
1991 fprintf(stderr,
1992 "erresc: unknown private set/reset mode %d\n",
1993 *args);
1994 break;
1995 }
1996 } else {
1997 switch(*args) {
1998 case 0: /* Error (IGNORED) */
1999 break;
2000 case 2: /* KAM -- keyboard action */
2001 MODBIT(term.mode, set, MODE_KBDLOCK);
2002 break;
2003 case 4: /* IRM -- Insertion-replacement */
2004 MODBIT(term.mode, set, MODE_INSERT);
2005 break;
2006 case 12: /* SRM -- Send/Receive */
2007 MODBIT(term.mode, !set, MODE_ECHO);
2008 break;
2009 case 20: /* LNM -- Linefeed/new line */
2010 MODBIT(term.mode, set, MODE_CRLF);
2011 break;
2012 default:
2013 fprintf(stderr,
2014 "erresc: unknown set/reset mode %d\n",
2015 *args);
2016 break;
2017 }
2018 }
2019 }
2020 }
2021
2022 void
2023 csihandle(void) {
2024 char buf[40];
2025 int len;
2026
2027 switch(csiescseq.mode[0]) {
2028 default:
2029 unknown:
2030 fprintf(stderr, "erresc: unknown csi ");
2031 csidump();
2032 /* die(""); */
2033 break;
2034 case '@': /* ICH -- Insert <n> blank char */
2035 DEFAULT(csiescseq.arg[0], 1);
2036 tinsertblank(csiescseq.arg[0]);
2037 break;
2038 case 'A': /* CUU -- Cursor <n> Up */
2039 DEFAULT(csiescseq.arg[0], 1);
2040 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
2041 break;
2042 case 'B': /* CUD -- Cursor <n> Down */
2043 case 'e': /* VPR --Cursor <n> Down */
2044 DEFAULT(csiescseq.arg[0], 1);
2045 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
2046 break;
2047 case 'i': /* MC -- Media Copy */
2048 switch(csiescseq.arg[0]) {
2049 case 0:
2050 tdump();
2051 break;
2052 case 1:
2053 tdumpline(term.c.y);
2054 break;
2055 case 2:
2056 tdumpsel();
2057 break;
2058 case 4:
2059 term.mode &= ~MODE_PRINT;
2060 break;
2061 case 5:
2062 term.mode |= MODE_PRINT;
2063 break;
2064 }
2065 break;
2066 case 'c': /* DA -- Device Attributes */
2067 if(csiescseq.arg[0] == 0)
2068 ttywrite(vtiden, sizeof(vtiden) - 1);
2069 break;
2070 case 'C': /* CUF -- Cursor <n> Forward */
2071 case 'a': /* HPR -- Cursor <n> Forward */
2072 DEFAULT(csiescseq.arg[0], 1);
2073 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
2074 break;
2075 case 'D': /* CUB -- Cursor <n> Backward */
2076 DEFAULT(csiescseq.arg[0], 1);
2077 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
2078 break;
2079 case 'E': /* CNL -- Cursor <n> Down and first col */
2080 DEFAULT(csiescseq.arg[0], 1);
2081 tmoveto(0, term.c.y+csiescseq.arg[0]);
2082 break;
2083 case 'F': /* CPL -- Cursor <n> Up and first col */
2084 DEFAULT(csiescseq.arg[0], 1);
2085 tmoveto(0, term.c.y-csiescseq.arg[0]);
2086 break;
2087 case 'g': /* TBC -- Tabulation clear */
2088 switch(csiescseq.arg[0]) {
2089 case 0: /* clear current tab stop */
2090 term.tabs[term.c.x] = 0;
2091 break;
2092 case 3: /* clear all the tabs */
2093 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
2094 break;
2095 default:
2096 goto unknown;
2097 }
2098 break;
2099 case 'G': /* CHA -- Move to <col> */
2100 case '`': /* HPA */
2101 DEFAULT(csiescseq.arg[0], 1);
2102 tmoveto(csiescseq.arg[0]-1, term.c.y);
2103 break;
2104 case 'H': /* CUP -- Move to <row> <col> */
2105 case 'f': /* HVP */
2106 DEFAULT(csiescseq.arg[0], 1);
2107 DEFAULT(csiescseq.arg[1], 1);
2108 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
2109 break;
2110 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
2111 DEFAULT(csiescseq.arg[0], 1);
2112 tputtab(csiescseq.arg[0]);
2113 break;
2114 case 'J': /* ED -- Clear screen */
2115 selclear(NULL);
2116 switch(csiescseq.arg[0]) {
2117 case 0: /* below */
2118 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
2119 if(term.c.y < term.row-1) {
2120 tclearregion(0, term.c.y+1, term.col-1,
2121 term.row-1);
2122 }
2123 break;
2124 case 1: /* above */
2125 if(term.c.y > 1)
2126 tclearregion(0, 0, term.col-1, term.c.y-1);
2127 tclearregion(0, term.c.y, term.c.x, term.c.y);
2128 break;
2129 case 2: /* all */
2130 tclearregion(0, 0, term.col-1, term.row-1);
2131 break;
2132 default:
2133 goto unknown;
2134 }
2135 break;
2136 case 'K': /* EL -- Clear line */
2137 switch(csiescseq.arg[0]) {
2138 case 0: /* right */
2139 tclearregion(term.c.x, term.c.y, term.col-1,
2140 term.c.y);
2141 break;
2142 case 1: /* left */
2143 tclearregion(0, term.c.y, term.c.x, term.c.y);
2144 break;
2145 case 2: /* all */
2146 tclearregion(0, term.c.y, term.col-1, term.c.y);
2147 break;
2148 }
2149 break;
2150 case 'S': /* SU -- Scroll <n> line up */
2151 DEFAULT(csiescseq.arg[0], 1);
2152 tscrollup(term.top, csiescseq.arg[0]);
2153 break;
2154 case 'T': /* SD -- Scroll <n> line down */
2155 DEFAULT(csiescseq.arg[0], 1);
2156 tscrolldown(term.top, csiescseq.arg[0]);
2157 break;
2158 case 'L': /* IL -- Insert <n> blank lines */
2159 DEFAULT(csiescseq.arg[0], 1);
2160 tinsertblankline(csiescseq.arg[0]);
2161 break;
2162 case 'l': /* RM -- Reset Mode */
2163 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
2164 break;
2165 case 'M': /* DL -- Delete <n> lines */
2166 DEFAULT(csiescseq.arg[0], 1);
2167 tdeleteline(csiescseq.arg[0]);
2168 break;
2169 case 'X': /* ECH -- Erase <n> char */
2170 DEFAULT(csiescseq.arg[0], 1);
2171 tclearregion(term.c.x, term.c.y,
2172 term.c.x + csiescseq.arg[0] - 1, term.c.y);
2173 break;
2174 case 'P': /* DCH -- Delete <n> char */
2175 DEFAULT(csiescseq.arg[0], 1);
2176 tdeletechar(csiescseq.arg[0]);
2177 break;
2178 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
2179 DEFAULT(csiescseq.arg[0], 1);
2180 tputtab(-csiescseq.arg[0]);
2181 break;
2182 case 'd': /* VPA -- Move to <row> */
2183 DEFAULT(csiescseq.arg[0], 1);
2184 tmoveato(term.c.x, csiescseq.arg[0]-1);
2185 break;
2186 case 'h': /* SM -- Set terminal mode */
2187 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
2188 break;
2189 case 'm': /* SGR -- Terminal attribute (color) */
2190 tsetattr(csiescseq.arg, csiescseq.narg);
2191 break;
2192 case 'n': /* DSR – Device Status Report (cursor position) */
2193 if (csiescseq.arg[0] == 6) {
2194 len = snprintf(buf, sizeof(buf),"\033[%i;%iR",
2195 term.c.y+1, term.c.x+1);
2196 ttywrite(buf, len);
2197 }
2198 break;
2199 case 'r': /* DECSTBM -- Set Scrolling Region */
2200 if(csiescseq.priv) {
2201 goto unknown;
2202 } else {
2203 DEFAULT(csiescseq.arg[0], 1);
2204 DEFAULT(csiescseq.arg[1], term.row);
2205 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
2206 tmoveato(0, 0);
2207 }
2208 break;
2209 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
2210 tcursor(CURSOR_SAVE);
2211 break;
2212 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
2213 tcursor(CURSOR_LOAD);
2214 break;
2215 case ' ':
2216 switch (csiescseq.mode[1]) {
2217 case 'q': /* DECSCUSR -- Set Cursor Style */
2218 DEFAULT(csiescseq.arg[0], 1);
2219 if (!BETWEEN(csiescseq.arg[0], 0, 6)) {
2220 goto unknown;
2221 }
2222 xw.cursor = csiescseq.arg[0];
2223 break;
2224 default:
2225 goto unknown;
2226 }
2227 break;
2228 }
2229 }
2230
2231 void
2232 csidump(void) {
2233 int i;
2234 uint c;
2235
2236 printf("ESC[");
2237 for(i = 0; i < csiescseq.len; i++) {
2238 c = csiescseq.buf[i] & 0xff;
2239 if(isprint(c)) {
2240 putchar(c);
2241 } else if(c == '\n') {
2242 printf("(\\n)");
2243 } else if(c == '\r') {
2244 printf("(\\r)");
2245 } else if(c == 0x1b) {
2246 printf("(\\e)");
2247 } else {
2248 printf("(%02x)", c);
2249 }
2250 }
2251 putchar('\n');
2252 }
2253
2254 void
2255 csireset(void) {
2256 memset(&csiescseq, 0, sizeof(csiescseq));
2257 }
2258
2259 void
2260 strhandle(void) {
2261 char *p = NULL;
2262 int j, narg, par;
2263
2264 term.esc &= ~(ESC_STR_END|ESC_STR);
2265 strparse();
2266 par = (narg = strescseq.narg) ? atoi(strescseq.args[0]) : 0;
2267
2268 switch(strescseq.type) {
2269 case ']': /* OSC -- Operating System Command */
2270 switch(par) {
2271 case 0:
2272 case 1:
2273 case 2:
2274 if(narg > 1)
2275 xsettitle(strescseq.args[1]);
2276 return;
2277 case 4: /* color set */
2278 if(narg < 3)
2279 break;
2280 p = strescseq.args[2];
2281 /* FALLTHROUGH */
2282 case 104: /* color reset, here p = NULL */
2283 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2284 if(xsetcolorname(j, p)) {
2285 fprintf(stderr, "erresc: invalid color %s\n", p);
2286 } else {
2287 /*
2288 * TODO if defaultbg color is changed, borders
2289 * are dirty
2290 */
2291 redraw();
2292 }
2293 return;
2294 }
2295 break;
2296 case 'k': /* old title set compatibility */
2297 xsettitle(strescseq.args[0]);
2298 return;
2299 case 'P': /* DCS -- Device Control String */
2300 case '_': /* APC -- Application Program Command */
2301 case '^': /* PM -- Privacy Message */
2302 return;
2303 }
2304
2305 fprintf(stderr, "erresc: unknown str ");
2306 strdump();
2307 }
2308
2309 void
2310 strparse(void) {
2311 int c;
2312 char *p = strescseq.buf;
2313
2314 strescseq.narg = 0;
2315 strescseq.buf[strescseq.len] = '\0';
2316
2317 if(*p == '\0')
2318 return;
2319
2320 while(strescseq.narg < STR_ARG_SIZ) {
2321 strescseq.args[strescseq.narg++] = p;
2322 while((c = *p) != ';' && c != '\0')
2323 ++p;
2324 if(c == '\0')
2325 return;
2326 *p++ = '\0';
2327 }
2328 }
2329
2330 void
2331 strdump(void) {
2332 int i;
2333 uint c;
2334
2335 printf("ESC%c", strescseq.type);
2336 for(i = 0; i < strescseq.len; i++) {
2337 c = strescseq.buf[i] & 0xff;
2338 if(c == '\0') {
2339 return;
2340 } else if(isprint(c)) {
2341 putchar(c);
2342 } else if(c == '\n') {
2343 printf("(\\n)");
2344 } else if(c == '\r') {
2345 printf("(\\r)");
2346 } else if(c == 0x1b) {
2347 printf("(\\e)");
2348 } else {
2349 printf("(%02x)", c);
2350 }
2351 }
2352 printf("ESC\\\n");
2353 }
2354
2355 void
2356 strreset(void) {
2357 memset(&strescseq, 0, sizeof(strescseq));
2358 }
2359
2360 void
2361 tprinter(char *s, size_t len) {
2362 if(iofd != -1 && xwrite(iofd, s, len) < 0) {
2363 fprintf(stderr, "Error writing in %s:%s\n",
2364 opt_io, strerror(errno));
2365 close(iofd);
2366 iofd = -1;
2367 }
2368 }
2369
2370 void
2371 toggleprinter(const Arg *arg) {
2372 term.mode ^= MODE_PRINT;
2373 }
2374
2375 void
2376 printscreen(const Arg *arg) {
2377 tdump();
2378 }
2379
2380 void
2381 printsel(const Arg *arg) {
2382 tdumpsel();
2383 }
2384
2385 void
2386 tdumpsel(void) {
2387 char *ptr;
2388
2389 if((ptr = getsel())) {
2390 tprinter(ptr, strlen(ptr));
2391 free(ptr);
2392 }
2393 }
2394
2395 void
2396 tdumpline(int n) {
2397 char buf[UTF_SIZ];
2398 Glyph *bp, *end;
2399
2400 bp = &term.line[n][0];
2401 end = &bp[MIN(tlinelen(n), term.col) - 1];
2402 if(bp != end || bp->u != ' ') {
2403 for( ;bp <= end; ++bp)
2404 tprinter(buf, utf8encode(bp->u, buf));
2405 }
2406 tprinter("\n", 1);
2407 }
2408
2409 void
2410 tdump(void) {
2411 int i;
2412
2413 for(i = 0; i < term.row; ++i)
2414 tdumpline(i);
2415 }
2416
2417 void
2418 tputtab(int n) {
2419 uint x = term.c.x;
2420
2421 if(n > 0) {
2422 while(x < term.col && n--)
2423 for(++x; x < term.col && !term.tabs[x]; ++x)
2424 /* nothing */ ;
2425 } else if(n < 0) {
2426 while(x > 0 && n++)
2427 for(--x; x > 0 && !term.tabs[x]; --x)
2428 /* nothing */ ;
2429 }
2430 term.c.x = LIMIT(x, 0, term.col-1);
2431 }
2432
2433 void
2434 techo(char *buf, int len) {
2435 for(; len > 0; buf++, len--) {
2436 char c = *buf;
2437
2438 if(ISCONTROL((uchar) c)) { /* control code */
2439 if(c & 0x80) {
2440 c &= 0x7f;
2441 tputc("^", 1);
2442 tputc("[", 1);
2443 } else if(c != '\n' && c != '\r' && c != '\t') {
2444 c ^= 0x40;
2445 tputc("^", 1);
2446 }
2447 tputc(&c, 1);
2448 } else {
2449 break;
2450 }
2451 }
2452 if(len)
2453 tputc(buf, len);
2454 }
2455
2456 void
2457 tdeftran(char ascii) {
2458 static char cs[] = "0B";
2459 static int vcs[] = {CS_GRAPHIC0, CS_USA};
2460 char *p;
2461
2462 if((p = strchr(cs, ascii)) == NULL) {
2463 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2464 } else {
2465 term.trantbl[term.icharset] = vcs[p - cs];
2466 }
2467 }
2468
2469 void
2470 tdectest(char c) {
2471 static char E[UTF_SIZ] = "E";
2472 int x, y;
2473
2474 if(c == '8') { /* DEC screen alignment test. */
2475 for(x = 0; x < term.col; ++x) {
2476 for(y = 0; y < term.row; ++y)
2477 tsetchar(E, &term.c.attr, x, y);
2478 }
2479 }
2480 }
2481
2482 void
2483 tstrsequence(uchar c) {
2484 switch (c) {
2485 case 0x90: /* DCS -- Device Control String */
2486 c = 'P';
2487 break;
2488 case 0x9f: /* APC -- Application Program Command */
2489 c = '_';
2490 break;
2491 case 0x9e: /* PM -- Privacy Message */
2492 c = '^';
2493 break;
2494 case 0x9d: /* OSC -- Operating System Command */
2495 c = ']';
2496 break;
2497 }
2498 strreset();
2499 strescseq.type = c;
2500 term.esc |= ESC_STR;
2501 }
2502
2503 void
2504 tcontrolcode(uchar ascii) {
2505 static char question[UTF_SIZ] = "?";
2506
2507 switch(ascii) {
2508 case '\t': /* HT */
2509 tputtab(1);
2510 return;
2511 case '\b': /* BS */
2512 tmoveto(term.c.x-1, term.c.y);
2513 return;
2514 case '\r': /* CR */
2515 tmoveto(0, term.c.y);
2516 return;
2517 case '\f': /* LF */
2518 case '\v': /* VT */
2519 case '\n': /* LF */
2520 /* go to first col if the mode is set */
2521 tnewline(IS_SET(MODE_CRLF));
2522 return;
2523 case '\a': /* BEL */
2524 if(term.esc & ESC_STR_END) {
2525 /* backwards compatibility to xterm */
2526 strhandle();
2527 } else {
2528 if(!(xw.state & WIN_FOCUSED))
2529 xseturgency(1);
2530 if (bellvolume)
2531 XkbBell(xw.dpy, xw.win, bellvolume, (Atom)NULL);
2532 }
2533 break;
2534 case '\033': /* ESC */
2535 csireset();
2536 term.esc &= ~(ESC_CSI|ESC_ALTCHARSET|ESC_TEST);
2537 term.esc |= ESC_START;
2538 return;
2539 case '\016': /* SO (LS1 -- Locking shift 1) */
2540 case '\017': /* SI (LS0 -- Locking shift 0) */
2541 term.charset = 1 - (ascii - '\016');
2542 return;
2543 case '\032': /* SUB */
2544 tsetchar(question, &term.c.attr, term.c.x, term.c.y);
2545 case '\030': /* CAN */
2546 csireset();
2547 break;
2548 case '\005': /* ENQ (IGNORED) */
2549 case '\000': /* NUL (IGNORED) */
2550 case '\021': /* XON (IGNORED) */
2551 case '\023': /* XOFF (IGNORED) */
2552 case 0177: /* DEL (IGNORED) */
2553 return;
2554 case 0x84: /* TODO: IND */
2555 break;
2556 case 0x85: /* NEL -- Next line */
2557 tnewline(1); /* always go to first col */
2558 break;
2559 case 0x88: /* HTS -- Horizontal tab stop */
2560 term.tabs[term.c.x] = 1;
2561 break;
2562 case 0x8d: /* TODO: RI */
2563 case 0x8e: /* TODO: SS2 */
2564 case 0x8f: /* TODO: SS3 */
2565 case 0x98: /* TODO: SOS */
2566 break;
2567 case 0x9a: /* DECID -- Identify Terminal */
2568 ttywrite(vtiden, sizeof(vtiden) - 1);
2569 break;
2570 case 0x9b: /* TODO: CSI */
2571 case 0x9c: /* TODO: ST */
2572 break;
2573 case 0x90: /* DCS -- Device Control String */
2574 case 0x9f: /* APC -- Application Program Command */
2575 case 0x9e: /* PM -- Privacy Message */
2576 case 0x9d: /* OSC -- Operating System Command */
2577 tstrsequence(ascii);
2578 return;
2579 }
2580 /* only CAN, SUB, \a and C1 chars interrupt a sequence */
2581 term.esc &= ~(ESC_STR_END|ESC_STR);
2582 }
2583
2584 /*
2585 * returns 1 when the sequence is finished and it hasn't to read
2586 * more characters for this sequence, otherwise 0
2587 */
2588 int
2589 eschandle(uchar ascii) {
2590 switch(ascii) {
2591 case '[':
2592 term.esc |= ESC_CSI;
2593 return 0;
2594 case '#':
2595 term.esc |= ESC_TEST;
2596 return 0;
2597 case 'P': /* DCS -- Device Control String */
2598 case '_': /* APC -- Application Program Command */
2599 case '^': /* PM -- Privacy Message */
2600 case ']': /* OSC -- Operating System Command */
2601 case 'k': /* old title set compatibility */
2602 tstrsequence(ascii);
2603 return 0;
2604 case 'n': /* LS2 -- Locking shift 2 */
2605 case 'o': /* LS3 -- Locking shift 3 */
2606 term.charset = 2 + (ascii - 'n');
2607 break;
2608 case '(': /* GZD4 -- set primary charset G0 */
2609 case ')': /* G1D4 -- set secondary charset G1 */
2610 case '*': /* G2D4 -- set tertiary charset G2 */
2611 case '+': /* G3D4 -- set quaternary charset G3 */
2612 term.icharset = ascii - '(';
2613 term.esc |= ESC_ALTCHARSET;
2614 return 0;
2615 case 'D': /* IND -- Linefeed */
2616 if(term.c.y == term.bot) {
2617 tscrollup(term.top, 1);
2618 } else {
2619 tmoveto(term.c.x, term.c.y+1);
2620 }
2621 break;
2622 case 'E': /* NEL -- Next line */
2623 tnewline(1); /* always go to first col */
2624 break;
2625 case 'H': /* HTS -- Horizontal tab stop */
2626 term.tabs[term.c.x] = 1;
2627 break;
2628 case 'M': /* RI -- Reverse index */
2629 if(term.c.y == term.top) {
2630 tscrolldown(term.top, 1);
2631 } else {
2632 tmoveto(term.c.x, term.c.y-1);
2633 }
2634 break;
2635 case 'Z': /* DECID -- Identify Terminal */
2636 ttywrite(vtiden, sizeof(vtiden) - 1);
2637 break;
2638 case 'c': /* RIS -- Reset to inital state */
2639 treset();
2640 xresettitle();
2641 xloadcols();
2642 break;
2643 case '=': /* DECPAM -- Application keypad */
2644 term.mode |= MODE_APPKEYPAD;
2645 break;
2646 case '>': /* DECPNM -- Normal keypad */
2647 term.mode &= ~MODE_APPKEYPAD;
2648 break;
2649 case '7': /* DECSC -- Save Cursor */
2650 tcursor(CURSOR_SAVE);
2651 break;
2652 case '8': /* DECRC -- Restore Cursor */
2653 tcursor(CURSOR_LOAD);
2654 break;
2655 case '\\': /* ST -- String Terminator */
2656 if(term.esc & ESC_STR_END)
2657 strhandle();
2658 break;
2659 default:
2660 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2661 (uchar) ascii, isprint(ascii)? ascii:'.');
2662 break;
2663 }
2664 return 1;
2665 }
2666
2667 void
2668 tputc(char *c, int len) {
2669 uchar ascii;
2670 bool control;
2671 long unicodep;
2672 int width;
2673 Glyph *gp;
2674
2675 if(len == 1) {
2676 width = 1;
2677 unicodep = ascii = *c;
2678 } else {
2679 utf8decode(c, &unicodep, UTF_SIZ);
2680 if ((width = wcwidth(unicodep)) == -1) {
2681 c = "\357\277\275"; /* UTF_INVALID */
2682 width = 1;
2683 }
2684 ascii = unicodep;
2685 }
2686
2687 if(IS_SET(MODE_PRINT))
2688 tprinter(c, len);
2689 control = ISCONTROL(unicodep);
2690
2691 /*
2692 * STR sequence must be checked before anything else
2693 * because it uses all following characters until it
2694 * receives a ESC, a SUB, a ST or any other C1 control
2695 * character.
2696 */
2697 if(term.esc & ESC_STR) {
2698 if(len == 1 &&
2699 (ascii == '\a' || ascii == 030 ||
2700 ascii == 032 || ascii == 033 ||
2701 ISCONTROLC1(unicodep))) {
2702 term.esc &= ~(ESC_START|ESC_STR);
2703 term.esc |= ESC_STR_END;
2704 } else if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2705 memmove(&strescseq.buf[strescseq.len], c, len);
2706 strescseq.len += len;
2707 return;
2708 } else {
2709 /*
2710 * Here is a bug in terminals. If the user never sends
2711 * some code to stop the str or esc command, then st
2712 * will stop responding. But this is better than
2713 * silently failing with unknown characters. At least
2714 * then users will report back.
2715 *
2716 * In the case users ever get fixed, here is the code:
2717 */
2718 /*
2719 * term.esc = 0;
2720 * strhandle();
2721 */
2722 return;
2723 }
2724 }
2725
2726 /*
2727 * Actions of control codes must be performed as soon they arrive
2728 * because they can be embedded inside a control sequence, and
2729 * they must not cause conflicts with sequences.
2730 */
2731 if(control) {
2732 tcontrolcode(ascii);
2733 /*
2734 * control codes are not shown ever
2735 */
2736 return;
2737 } else if(term.esc & ESC_START) {
2738 if(term.esc & ESC_CSI) {
2739 csiescseq.buf[csiescseq.len++] = ascii;
2740 if(BETWEEN(ascii, 0x40, 0x7E)
2741 || csiescseq.len >= \
2742 sizeof(csiescseq.buf)-1) {
2743 term.esc = 0;
2744 csiparse();
2745 csihandle();
2746 }
2747 return;
2748 } else if(term.esc & ESC_ALTCHARSET) {
2749 tdeftran(ascii);
2750 } else if(term.esc & ESC_TEST) {
2751 tdectest(ascii);
2752 } else {
2753 if (!eschandle(ascii))
2754 return;
2755 /* sequence already finished */
2756 }
2757 term.esc = 0;
2758 /*
2759 * All characters which form part of a sequence are not
2760 * printed
2761 */
2762 return;
2763 }
2764 if(sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
2765 selclear(NULL);
2766
2767 gp = &term.line[term.c.y][term.c.x];
2768 if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2769 gp->mode |= ATTR_WRAP;
2770 tnewline(1);
2771 gp = &term.line[term.c.y][term.c.x];
2772 }
2773
2774 if(IS_SET(MODE_INSERT) && term.c.x+width < term.col)
2775 memmove(gp+width, gp, (term.col - term.c.x - width) * sizeof(Glyph));
2776
2777 if(term.c.x+width > term.col) {
2778 tnewline(1);
2779 gp = &term.line[term.c.y][term.c.x];
2780 }
2781
2782 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2783
2784 if(width == 2) {
2785 gp->mode |= ATTR_WIDE;
2786 if(term.c.x+1 < term.col) {
2787 gp[1].u = '\0';
2788 gp[1].mode = ATTR_WDUMMY;
2789 }
2790 }
2791 if(term.c.x+width < term.col) {
2792 tmoveto(term.c.x+width, term.c.y);
2793 } else {
2794 term.c.state |= CURSOR_WRAPNEXT;
2795 }
2796 }
2797
2798 void
2799 tresize(int col, int row) {
2800 int i;
2801 int minrow = MIN(row, term.row);
2802 int mincol = MIN(col, term.col);
2803 bool *bp;
2804 TCursor c;
2805
2806 if(col < 1 || row < 1) {
2807 fprintf(stderr,
2808 "tresize: error resizing to %dx%d\n", col, row);
2809 return;
2810 }
2811
2812 /*
2813 * slide screen to keep cursor where we expect it -
2814 * tscrollup would work here, but we can optimize to
2815 * memmove because we're freeing the earlier lines
2816 */
2817 for(i = 0; i <= term.c.y - row; i++) {
2818 free(term.line[i]);
2819 free(term.alt[i]);
2820 }
2821 /* ensure that both src and dst are not NULL */
2822 if (i > 0) {
2823 memmove(term.line, term.line + i, row * sizeof(Line));
2824 memmove(term.alt, term.alt + i, row * sizeof(Line));
2825 }
2826 for(i += row; i < term.row; i++) {
2827 free(term.line[i]);
2828 free(term.alt[i]);
2829 }
2830
2831 /* resize to new height */
2832 term.line = xrealloc(term.line, row * sizeof(Line));
2833 term.alt = xrealloc(term.alt, row * sizeof(Line));
2834 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2835 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2836
2837 /* resize each row to new width, zero-pad if needed */
2838 for(i = 0; i < minrow; i++) {
2839 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2840 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2841 }
2842
2843 /* allocate any new rows */
2844 for(/* i == minrow */; i < row; i++) {
2845 term.line[i] = xmalloc(col * sizeof(Glyph));
2846 term.alt[i] = xmalloc(col * sizeof(Glyph));
2847 }
2848 if(col > term.col) {
2849 bp = term.tabs + term.col;
2850
2851 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2852 while(--bp > term.tabs && !*bp)
2853 /* nothing */ ;
2854 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2855 *bp = 1;
2856 }
2857 /* update terminal size */
2858 term.col = col;
2859 term.row = row;
2860 /* reset scrolling region */
2861 tsetscroll(0, row-1);
2862 /* make use of the LIMIT in tmoveto */
2863 tmoveto(term.c.x, term.c.y);
2864 /* Clearing both screens (it makes dirty all lines) */
2865 c = term.c;
2866 for(i = 0; i < 2; i++) {
2867 if(mincol < col && 0 < minrow) {
2868 tclearregion(mincol, 0, col - 1, minrow - 1);
2869 }
2870 if(0 < col && minrow < row) {
2871 tclearregion(0, minrow, col - 1, row - 1);
2872 }
2873 tswapscreen();
2874 tcursor(CURSOR_LOAD);
2875 }
2876 term.c = c;
2877 }
2878
2879 void
2880 xresize(int col, int row) {
2881 xw.tw = MAX(1, col * xw.cw);
2882 xw.th = MAX(1, row * xw.ch);
2883
2884 XFreePixmap(xw.dpy, xw.buf);
2885 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2886 DefaultDepth(xw.dpy, xw.scr));
2887 XftDrawChange(xw.draw, xw.buf);
2888 xclear(0, 0, xw.w, xw.h);
2889 }
2890
2891 ushort
2892 sixd_to_16bit(int x) {
2893 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2894 }
2895
2896 bool
2897 xloadcolor(int i, const char *name, Color *ncolor) {
2898 XRenderColor color = { .alpha = 0xffff };
2899
2900 if(!name) {
2901 if(BETWEEN(i, 16, 255)) { /* 256 color */
2902 if(i < 6*6*6+16) { /* same colors as xterm */
2903 color.red = sixd_to_16bit( ((i-16)/36)%6 );
2904 color.green = sixd_to_16bit( ((i-16)/6) %6 );
2905 color.blue = sixd_to_16bit( ((i-16)/1) %6 );
2906 } else { /* greyscale */
2907 color.red = 0x0808 + 0x0a0a * (i - (6*6*6+16));
2908 color.green = color.blue = color.red;
2909 }
2910 return XftColorAllocValue(xw.dpy, xw.vis,
2911 xw.cmap, &color, ncolor);
2912 } else
2913 name = colorname[i];
2914 }
2915 return XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, ncolor);
2916 }
2917
2918 void
2919 xloadcols(void) {
2920 int i;
2921 static bool loaded;
2922 Color *cp;
2923
2924 if(loaded) {
2925 for (cp = dc.col; cp < &dc.col[LEN(dc.col)]; ++cp)
2926 XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
2927 }
2928
2929 for(i = 0; i < LEN(dc.col); i++)
2930 if(!xloadcolor(i, NULL, &dc.col[i])) {
2931 if(colorname[i])
2932 die("Could not allocate color '%s'\n", colorname[i]);
2933 else
2934 die("Could not allocate color %d\n", i);
2935 }
2936 loaded = true;
2937 }
2938
2939 int
2940 xsetcolorname(int x, const char *name) {
2941 Color ncolor;
2942
2943 if(!BETWEEN(x, 0, LEN(dc.col)))
2944 return 1;
2945
2946
2947 if(!xloadcolor(x, name, &ncolor))
2948 return 1;
2949
2950 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2951 dc.col[x] = ncolor;
2952 return 0;
2953 }
2954
2955 void
2956 xtermclear(int col1, int row1, int col2, int row2) {
2957 XftDrawRect(xw.draw,
2958 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2959 borderpx + col1 * xw.cw,
2960 borderpx + row1 * xw.ch,
2961 (col2-col1+1) * xw.cw,
2962 (row2-row1+1) * xw.ch);
2963 }
2964
2965 /*
2966 * Absolute coordinates.
2967 */
2968 void
2969 xclear(int x1, int y1, int x2, int y2) {
2970 XftDrawRect(xw.draw,
2971 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2972 x1, y1, x2-x1, y2-y1);
2973 }
2974
2975 void
2976 xhints(void) {
2977 XClassHint class = {opt_class ? opt_class : termname, termname};
2978 XWMHints wm = {.flags = InputHint, .input = 1};
2979 XSizeHints *sizeh = NULL;
2980
2981 sizeh = XAllocSizeHints();
2982
2983 sizeh->flags = PSize | PResizeInc | PBaseSize;
2984 sizeh->height = xw.h;
2985 sizeh->width = xw.w;
2986 sizeh->height_inc = xw.ch;
2987 sizeh->width_inc = xw.cw;
2988 sizeh->base_height = 2 * borderpx;
2989 sizeh->base_width = 2 * borderpx;
2990 if(xw.isfixed == True) {
2991 sizeh->flags |= PMaxSize | PMinSize;
2992 sizeh->min_width = sizeh->max_width = xw.w;
2993 sizeh->min_height = sizeh->max_height = xw.h;
2994 }
2995 if(xw.gm & (XValue|YValue)) {
2996 sizeh->flags |= USPosition | PWinGravity;
2997 sizeh->x = xw.l;
2998 sizeh->y = xw.t;
2999 sizeh->win_gravity = xgeommasktogravity(xw.gm);
3000 }
3001
3002 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
3003 &class);
3004 XFree(sizeh);
3005 }
3006
3007 int
3008 xgeommasktogravity(int mask) {
3009 switch(mask & (XNegative|YNegative)) {
3010 case 0:
3011 return NorthWestGravity;
3012 case XNegative:
3013 return NorthEastGravity;
3014 case YNegative:
3015 return SouthWestGravity;
3016 }
3017 return SouthEastGravity;
3018 }
3019
3020 int
3021 xloadfont(Font *f, FcPattern *pattern) {
3022 FcPattern *match;
3023 FcResult result;
3024
3025 match = FcFontMatch(NULL, pattern, &result);
3026 if(!match)
3027 return 1;
3028
3029 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
3030 FcPatternDestroy(match);
3031 return 1;
3032 }
3033
3034 f->set = NULL;
3035 f->pattern = FcPatternDuplicate(pattern);
3036
3037 f->ascent = f->match->ascent;
3038 f->descent = f->match->descent;
3039 f->lbearing = 0;
3040 f->rbearing = f->match->max_advance_width;
3041
3042 f->height = f->ascent + f->descent;
3043 f->width = f->lbearing + f->rbearing;
3044
3045 return 0;
3046 }
3047
3048 void
3049 xloadfonts(char *fontstr, double fontsize) {
3050 FcPattern *pattern;
3051 FcResult r_sz, r_psz;
3052 double fontval;
3053 float ceilf(float);
3054
3055 if(fontstr[0] == '-') {
3056 pattern = XftXlfdParse(fontstr, False, False);
3057 } else {
3058 pattern = FcNameParse((FcChar8 *)fontstr);
3059 }
3060
3061 if(!pattern)
3062 die("st: can't open font %s\n", fontstr);
3063
3064 if(fontsize > 1) {
3065 FcPatternDel(pattern, FC_PIXEL_SIZE);
3066 FcPatternDel(pattern, FC_SIZE);
3067 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
3068 usedfontsize = fontsize;
3069 } else {
3070 r_psz = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
3071 r_sz = FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval);
3072 if(r_psz == FcResultMatch) {
3073 usedfontsize = fontval;
3074 } else if(r_sz == FcResultMatch) {
3075 usedfontsize = -1;
3076 } else {
3077 /*
3078 * Default font size is 12, if none given. This is to
3079 * have a known usedfontsize value.
3080 */
3081 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
3082 usedfontsize = 12;
3083 }
3084 defaultfontsize = usedfontsize;
3085 }
3086
3087 FcConfigSubstitute(0, pattern, FcMatchPattern);
3088 FcDefaultSubstitute(pattern);
3089
3090 if(xloadfont(&dc.font, pattern))
3091 die("st: can't open font %s\n", fontstr);
3092
3093 if(usedfontsize < 0) {
3094 FcPatternGetDouble(dc.font.match->pattern,
3095 FC_PIXEL_SIZE, 0, &fontval);
3096 usedfontsize = fontval;
3097 if(fontsize == 0)
3098 defaultfontsize = fontval;
3099 }
3100
3101 /* Setting character width and height. */
3102 xw.cw = ceilf(dc.font.width * cwscale);
3103 xw.ch = ceilf(dc.font.height * chscale);
3104
3105 FcPatternDel(pattern, FC_SLANT);
3106 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
3107 if(xloadfont(&dc.ifont, pattern))
3108 die("st: can't open font %s\n", fontstr);
3109
3110 FcPatternDel(pattern, FC_WEIGHT);
3111 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
3112 if(xloadfont(&dc.ibfont, pattern))
3113 die("st: can't open font %s\n", fontstr);
3114
3115 FcPatternDel(pattern, FC_SLANT);
3116 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
3117 if(xloadfont(&dc.bfont, pattern))
3118 die("st: can't open font %s\n", fontstr);
3119
3120 FcPatternDestroy(pattern);
3121 }
3122
3123 void
3124 xunloadfont(Font *f) {
3125 XftFontClose(xw.dpy, f->match);
3126 FcPatternDestroy(f->pattern);
3127 if(f->set)
3128 FcFontSetDestroy(f->set);
3129 }
3130
3131 void
3132 xunloadfonts(void) {
3133 /* Free the loaded fonts in the font cache. */
3134 while(frclen > 0)
3135 XftFontClose(xw.dpy, frc[--frclen].font);
3136
3137 xunloadfont(&dc.font);
3138 xunloadfont(&dc.bfont);
3139 xunloadfont(&dc.ifont);
3140 xunloadfont(&dc.ibfont);
3141 }
3142
3143 void
3144 xzoom(const Arg *arg) {
3145 Arg larg;
3146
3147 larg.i = usedfontsize + arg->i;
3148 xzoomabs(&larg);
3149 }
3150
3151 void
3152 xzoomabs(const Arg *arg) {
3153 xunloadfonts();
3154 xloadfonts(usedfont, arg->i);
3155 cresize(0, 0);
3156 redraw();
3157 xhints();
3158 }
3159
3160 void
3161 xzoomreset(const Arg *arg) {
3162 Arg larg;
3163
3164 if(defaultfontsize > 0) {
3165 larg.i = defaultfontsize;
3166 xzoomabs(&larg);
3167 }
3168 }
3169
3170 void
3171 xinit(void) {
3172 XGCValues gcvalues;
3173 Cursor cursor;
3174 Window parent;
3175 pid_t thispid = getpid();
3176
3177 if(!(xw.dpy = XOpenDisplay(NULL)))
3178 die("Can't open display\n");
3179 xw.scr = XDefaultScreen(xw.dpy);
3180 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
3181
3182 /* font */
3183 if(!FcInit())
3184 die("Could not init fontconfig.\n");
3185
3186 usedfont = (opt_font == NULL)? font : opt_font;
3187 xloadfonts(usedfont, 0);
3188
3189 /* colors */
3190 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
3191 xloadcols();
3192
3193 /* adjust fixed window geometry */
3194 xw.w = 2 * borderpx + term.col * xw.cw;
3195 xw.h = 2 * borderpx + term.row * xw.ch;
3196 if(xw.gm & XNegative)
3197 xw.l += DisplayWidth(xw.dpy, xw.scr) - xw.w - 2;
3198 if(xw.gm & YNegative)
3199 xw.t += DisplayWidth(xw.dpy, xw.scr) - xw.h - 2;
3200
3201 /* Events */
3202 xw.attrs.background_pixel = dc.col[defaultbg].pixel;
3203 xw.attrs.border_pixel = dc.col[defaultbg].pixel;
3204 xw.attrs.bit_gravity = NorthWestGravity;
3205 xw.attrs.event_mask = FocusChangeMask | KeyPressMask
3206 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
3207 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
3208 xw.attrs.colormap = xw.cmap;
3209
3210 if (!(opt_embed && (parent = strtol(opt_embed, NULL, 0))))
3211 parent = XRootWindow(xw.dpy, xw.scr);
3212 xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
3213 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
3214 xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
3215 | CWEventMask | CWColormap, &xw.attrs);
3216
3217 memset(&gcvalues, 0, sizeof(gcvalues));
3218 gcvalues.graphics_exposures = False;
3219 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
3220 &gcvalues);
3221 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
3222 DefaultDepth(xw.dpy, xw.scr));
3223 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
3224 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
3225
3226 /* Xft rendering context */
3227 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
3228
3229 /* input methods */
3230 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3231 XSetLocaleModifiers("@im=local");
3232 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3233 XSetLocaleModifiers("@im=");
3234 if((xw.xim = XOpenIM(xw.dpy,
3235 NULL, NULL, NULL)) == NULL) {
3236 die("XOpenIM failed. Could not open input"
3237 " device.\n");
3238 }
3239 }
3240 }
3241 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
3242 | XIMStatusNothing, XNClientWindow, xw.win,
3243 XNFocusWindow, xw.win, NULL);
3244 if(xw.xic == NULL)
3245 die("XCreateIC failed. Could not obtain input method.\n");
3246
3247 /* white cursor, black outline */
3248 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
3249 XDefineCursor(xw.dpy, xw.win, cursor);
3250 XRecolorCursor(xw.dpy, cursor,
3251 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
3252 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
3253
3254 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
3255 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
3256 xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
3257 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
3258
3259 xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
3260 XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
3261 PropModeReplace, (uchar *)&thispid, 1);
3262
3263 xresettitle();
3264 XMapWindow(xw.dpy, xw.win);
3265 xhints();
3266 XSync(xw.dpy, False);
3267 }
3268
3269 void
3270 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
3271 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
3272 width = charlen * xw.cw, xp, i;
3273 int frcflags, charexists;
3274 int u8fl, u8fblen, u8cblen, doesexist;
3275 char *u8c, *u8fs;
3276 long unicodep;
3277 Font *font = &dc.font;
3278 FcResult fcres;
3279 FcPattern *fcpattern, *fontpattern;
3280 FcFontSet *fcsets[] = { NULL };
3281 FcCharSet *fccharset;
3282 Color *fg, *bg, *temp, revfg, revbg, truefg, truebg;
3283 XRenderColor colfg, colbg;
3284 XRectangle r;
3285 int oneatatime;
3286
3287 frcflags = FRC_NORMAL;
3288
3289 if(base.mode & ATTR_ITALIC) {
3290 if(base.fg == defaultfg)
3291 base.fg = defaultitalic;
3292 font = &dc.ifont;
3293 frcflags = FRC_ITALIC;
3294 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
3295 if(base.fg == defaultfg)
3296 base.fg = defaultitalic;
3297 font = &dc.ibfont;
3298 frcflags = FRC_ITALICBOLD;
3299 } else if(base.mode & ATTR_UNDERLINE) {
3300 if(base.fg == defaultfg)
3301 base.fg = defaultunderline;
3302 }
3303
3304 if(IS_TRUECOL(base.fg)) {
3305 colfg.alpha = 0xffff;
3306 colfg.red = TRUERED(base.fg);
3307 colfg.green = TRUEGREEN(base.fg);
3308 colfg.blue = TRUEBLUE(base.fg);
3309 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
3310 fg = &truefg;
3311 } else {
3312 fg = &dc.col[base.fg];
3313 }
3314
3315 if(IS_TRUECOL(base.bg)) {
3316 colbg.alpha = 0xffff;
3317 colbg.green = TRUEGREEN(base.bg);
3318 colbg.red = TRUERED(base.bg);
3319 colbg.blue = TRUEBLUE(base.bg);
3320 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
3321 bg = &truebg;
3322 } else {
3323 bg = &dc.col[base.bg];
3324 }
3325
3326 if(base.mode & ATTR_BOLD) {
3327 /*
3328 * change basic system colors [0-7]
3329 * to bright system colors [8-15]
3330 */
3331 if(BETWEEN(base.fg, 0, 7) && !(base.mode & ATTR_FAINT))
3332 fg = &dc.col[base.fg + 8];
3333
3334 if(base.mode & ATTR_ITALIC) {
3335 font = &dc.ibfont;
3336 frcflags = FRC_ITALICBOLD;
3337 } else {
3338 font = &dc.bfont;
3339 frcflags = FRC_BOLD;
3340 }
3341 }
3342
3343 if(IS_SET(MODE_REVERSE)) {
3344 if(fg == &dc.col[defaultfg]) {
3345 fg = &dc.col[defaultbg];
3346 } else {
3347 colfg.red = ~fg->color.red;
3348 colfg.green = ~fg->color.green;
3349 colfg.blue = ~fg->color.blue;
3350 colfg.alpha = fg->color.alpha;
3351 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
3352 &revfg);
3353 fg = &revfg;
3354 }
3355
3356 if(bg == &dc.col[defaultbg]) {
3357 bg = &dc.col[defaultfg];
3358 } else {
3359 colbg.red = ~bg->color.red;
3360 colbg.green = ~bg->color.green;
3361 colbg.blue = ~bg->color.blue;
3362 colbg.alpha = bg->color.alpha;
3363 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
3364 &revbg);
3365 bg = &revbg;
3366 }
3367 }
3368
3369 if(base.mode & ATTR_REVERSE) {
3370 temp = fg;
3371 fg = bg;
3372 bg = temp;
3373 }
3374
3375 if(base.mode & ATTR_FAINT && !(base.mode & ATTR_BOLD)) {
3376 colfg.red = fg->color.red / 2;
3377 colfg.green = fg->color.green / 2;
3378 colfg.blue = fg->color.blue / 2;
3379 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
3380 fg = &revfg;
3381 }
3382
3383 if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
3384 fg = bg;
3385
3386 if(base.mode & ATTR_INVISIBLE)
3387 fg = bg;
3388
3389 /* Intelligent cleaning up of the borders. */
3390 if(x == 0) {
3391 xclear(0, (y == 0)? 0 : winy, borderpx,
3392 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
3393 }
3394 if(x + charlen >= term.col) {
3395 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
3396 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
3397 }
3398 if(y == 0)
3399 xclear(winx, 0, winx + width, borderpx);
3400 if(y == term.row-1)
3401 xclear(winx, winy + xw.ch, winx + width, xw.h);
3402
3403 /* Clean up the region we want to draw to. */
3404 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
3405
3406 /* Set the clip region because Xft is sometimes dirty. */
3407 r.x = 0;
3408 r.y = 0;
3409 r.height = xw.ch;
3410 r.width = width;
3411 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
3412
3413 for(xp = winx; bytelen > 0;) {
3414 /*
3415 * Search for the range in the to be printed string of glyphs
3416 * that are in the main font. Then print that range. If
3417 * some glyph is found that is not in the font, do the
3418 * fallback dance.
3419 */
3420 u8fs = s;
3421 u8fblen = 0;
3422 u8fl = 0;
3423 oneatatime = font->width != xw.cw;
3424 for(;;) {
3425 u8c = s;
3426 u8cblen = utf8decode(s, &unicodep, UTF_SIZ);
3427 s += u8cblen;
3428 bytelen -= u8cblen;
3429
3430 doesexist = XftCharExists(xw.dpy, font->match, unicodep);
3431 if(doesexist) {
3432 u8fl++;
3433 u8fblen += u8cblen;
3434 if(!oneatatime && bytelen > 0)
3435 continue;
3436 }
3437
3438 if(u8fl > 0) {
3439 XftDrawStringUtf8(xw.draw, fg,
3440 font->match, xp,
3441 winy + font->ascent,
3442 (FcChar8 *)u8fs,
3443 u8fblen);
3444 xp += xw.cw * u8fl;
3445 }
3446 break;
3447 }
3448 if(doesexist) {
3449 if(oneatatime)
3450 continue;
3451 break;
3452 }
3453
3454 /* Search the font cache. */
3455 for(i = 0; i < frclen; i++) {
3456 charexists = XftCharExists(xw.dpy, frc[i].font, unicodep);
3457 /* Everything correct. */
3458 if(charexists && frc[i].flags == frcflags)
3459 break;
3460 /* We got a default font for a not found glyph. */
3461 if(!charexists && frc[i].flags == frcflags \
3462 && frc[i].unicodep == unicodep) {
3463 break;
3464 }
3465 }
3466
3467 /* Nothing was found. */
3468 if(i >= frclen) {
3469 if(!font->set)
3470 font->set = FcFontSort(0, font->pattern,
3471 FcTrue, 0, &fcres);
3472 fcsets[0] = font->set;
3473
3474 /*
3475 * Nothing was found in the cache. Now use
3476 * some dozen of Fontconfig calls to get the
3477 * font for one single character.
3478 *
3479 * Xft and fontconfig are design failures.
3480 */
3481 fcpattern = FcPatternDuplicate(font->pattern);
3482 fccharset = FcCharSetCreate();
3483
3484 FcCharSetAddChar(fccharset, unicodep);
3485 FcPatternAddCharSet(fcpattern, FC_CHARSET,
3486 fccharset);
3487 FcPatternAddBool(fcpattern, FC_SCALABLE,
3488 FcTrue);
3489
3490 FcConfigSubstitute(0, fcpattern,
3491 FcMatchPattern);
3492 FcDefaultSubstitute(fcpattern);
3493
3494 fontpattern = FcFontSetMatch(0, fcsets, 1,
3495 fcpattern, &fcres);
3496
3497 /*
3498 * Overwrite or create the new cache entry.
3499 */
3500 if(frclen >= LEN(frc)) {
3501 frclen = LEN(frc) - 1;
3502 XftFontClose(xw.dpy, frc[frclen].font);
3503 frc[frclen].unicodep = 0;
3504 }
3505
3506 frc[frclen].font = XftFontOpenPattern(xw.dpy,
3507 fontpattern);
3508 frc[frclen].flags = frcflags;
3509 frc[frclen].unicodep = unicodep;
3510
3511 i = frclen;
3512 frclen++;
3513
3514 FcPatternDestroy(fcpattern);
3515 FcCharSetDestroy(fccharset);
3516 }
3517
3518 XftDrawStringUtf8(xw.draw, fg, frc[i].font,
3519 xp, winy + frc[i].font->ascent,
3520 (FcChar8 *)u8c, u8cblen);
3521
3522 xp += xw.cw * wcwidth(unicodep);
3523 }
3524
3525 /*
3526 * This is how the loop above actually should be. Why does the
3527 * application have to care about font details?
3528 *
3529 * I have to repeat: Xft and Fontconfig are design failures.
3530 */
3531 /*
3532 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
3533 winy + font->ascent, (FcChar8 *)s, bytelen);
3534 */
3535
3536 if(base.mode & ATTR_UNDERLINE) {
3537 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
3538 width, 1);
3539 }
3540
3541 if(base.mode & ATTR_STRUCK) {
3542 XftDrawRect(xw.draw, fg, winx, winy + 2 * font->ascent / 3,
3543 width, 1);
3544 }
3545
3546 /* Reset clip to none. */
3547 XftDrawSetClip(xw.draw, 0);
3548 }
3549
3550 void
3551 xdrawglyph(Glyph g, int x, int y) {
3552 static char buf[UTF_SIZ];
3553 size_t len = utf8encode(g.u, buf);
3554 int width = g.mode & ATTR_WIDE ? 2 : 1;
3555
3556 xdraws(buf, g, x, y, width, len);
3557 }
3558
3559 void
3560 xdrawcursor(void) {
3561 static int oldx = 0, oldy = 0;
3562 int curx;
3563 Glyph g = {' ', ATTR_NULL, defaultbg, defaultcs};
3564
3565 LIMIT(oldx, 0, term.col-1);
3566 LIMIT(oldy, 0, term.row-1);
3567
3568 curx = term.c.x;
3569
3570 /* adjust position if in dummy */
3571 if(term.line[oldy][oldx].mode & ATTR_WDUMMY)
3572 oldx--;
3573 if(term.line[term.c.y][curx].mode & ATTR_WDUMMY)
3574 curx--;
3575
3576 g.u = term.line[term.c.y][term.c.x].u;
3577
3578 /* remove the old cursor */
3579 xdrawglyph(term.line[oldy][oldx], oldx, oldy);
3580
3581 if(IS_SET(MODE_HIDE))
3582 return;
3583
3584 /* draw the new one */
3585 if(xw.state & WIN_FOCUSED) {
3586 switch (xw.cursor) {
3587 case 0: /* Blinking Block */
3588 case 1: /* Blinking Block (Default) */
3589 case 2: /* Steady Block */
3590 if(IS_SET(MODE_REVERSE)) {
3591 g.mode |= ATTR_REVERSE;
3592 g.fg = defaultcs;
3593 g.bg = defaultfg;
3594 }
3595
3596 g.mode |= term.line[term.c.y][curx].mode & ATTR_WIDE;
3597 xdrawglyph(g, term.c.x, term.c.y);
3598 break;
3599 case 3: /* Blinking Underline */
3600 case 4: /* Steady Underline */
3601 XftDrawRect(xw.draw, &dc.col[defaultcs],
3602 borderpx + curx * xw.cw,
3603 borderpx + (term.c.y + 1) * xw.ch - cursorthickness,
3604 xw.cw, cursorthickness);
3605 break;
3606 case 5: /* Blinking bar */
3607 case 6: /* Steady bar */
3608 XftDrawRect(xw.draw, &dc.col[defaultcs],
3609 borderpx + curx * xw.cw,
3610 borderpx + term.c.y * xw.ch,
3611 cursorthickness, xw.ch);
3612 break;
3613 }
3614 } else {
3615 XftDrawRect(xw.draw, &dc.col[defaultcs],
3616 borderpx + curx * xw.cw,
3617 borderpx + term.c.y * xw.ch,
3618 xw.cw - 1, 1);
3619 XftDrawRect(xw.draw, &dc.col[defaultcs],
3620 borderpx + curx * xw.cw,
3621 borderpx + term.c.y * xw.ch,
3622 1, xw.ch - 1);
3623 XftDrawRect(xw.draw, &dc.col[defaultcs],
3624 borderpx + (curx + 1) * xw.cw - 1,
3625 borderpx + term.c.y * xw.ch,
3626 1, xw.ch - 1);
3627 XftDrawRect(xw.draw, &dc.col[defaultcs],
3628 borderpx + curx * xw.cw,
3629 borderpx + (term.c.y + 1) * xw.ch - 1,
3630 xw.cw, 1);
3631 }
3632 oldx = curx, oldy = term.c.y;
3633 }
3634
3635
3636 void
3637 xsettitle(char *p) {
3638 XTextProperty prop;
3639
3640 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3641 &prop);
3642 XSetWMName(xw.dpy, xw.win, &prop);
3643 XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
3644 XFree(prop.value);
3645 }
3646
3647 void
3648 xresettitle(void) {
3649 xsettitle(opt_title ? opt_title : "st");
3650 }
3651
3652 void
3653 redraw(void) {
3654 tfulldirt();
3655 draw();
3656 }
3657
3658 void
3659 draw(void) {
3660 drawregion(0, 0, term.col, term.row);
3661 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3662 xw.h, 0, 0);
3663 XSetForeground(xw.dpy, dc.gc,
3664 dc.col[IS_SET(MODE_REVERSE)?
3665 defaultfg : defaultbg].pixel);
3666 }
3667
3668 void
3669 drawregion(int x1, int y1, int x2, int y2) {
3670 int ic, ib, x, y, ox;
3671 Glyph base, new;
3672 char buf[DRAW_BUF_SIZ];
3673 bool ena_sel = sel.ob.x != -1 && sel.alt == IS_SET(MODE_ALTSCREEN);
3674
3675 if(!(xw.state & WIN_VISIBLE))
3676 return;
3677
3678 for(y = y1; y < y2; y++) {
3679 if(!term.dirty[y])
3680 continue;
3681
3682 xtermclear(0, y, term.col, y);
3683 term.dirty[y] = 0;
3684 base = term.line[y][0];
3685 ic = ib = ox = 0;
3686 for(x = x1; x < x2; x++) {
3687 new = term.line[y][x];
3688 if(new.mode == ATTR_WDUMMY)
3689 continue;
3690 if(ena_sel && selected(x, y))
3691 new.mode ^= ATTR_REVERSE;
3692 if(ib > 0 && (ATTRCMP(base, new)
3693 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3694 xdraws(buf, base, ox, y, ic, ib);
3695 ic = ib = 0;
3696 }
3697 if(ib == 0) {
3698 ox = x;
3699 base = new;
3700 }
3701
3702 ib += utf8encode(new.u, buf+ib);
3703 ic += (new.mode & ATTR_WIDE)? 2 : 1;
3704 }
3705 if(ib > 0)
3706 xdraws(buf, base, ox, y, ic, ib);
3707 }
3708 xdrawcursor();
3709 }
3710
3711 void
3712 expose(XEvent *ev) {
3713 redraw();
3714 }
3715
3716 void
3717 visibility(XEvent *ev) {
3718 XVisibilityEvent *e = &ev->xvisibility;
3719
3720 MODBIT(xw.state, e->state != VisibilityFullyObscured, WIN_VISIBLE);
3721 }
3722
3723 void
3724 unmap(XEvent *ev) {
3725 xw.state &= ~WIN_VISIBLE;
3726 }
3727
3728 void
3729 xsetpointermotion(int set) {
3730 MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
3731 XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
3732 }
3733
3734 void
3735 xseturgency(int add) {
3736 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3737
3738 MODBIT(h->flags, add, XUrgencyHint);
3739 XSetWMHints(xw.dpy, xw.win, h);
3740 XFree(h);
3741 }
3742
3743 void
3744 focus(XEvent *ev) {
3745 XFocusChangeEvent *e = &ev->xfocus;
3746
3747 if(e->mode == NotifyGrab)
3748 return;
3749
3750 if(ev->type == FocusIn) {
3751 XSetICFocus(xw.xic);
3752 xw.state |= WIN_FOCUSED;
3753 xseturgency(0);
3754 if(IS_SET(MODE_FOCUS))
3755 ttywrite("\033[I", 3);
3756 } else {
3757 XUnsetICFocus(xw.xic);
3758 xw.state &= ~WIN_FOCUSED;
3759 if(IS_SET(MODE_FOCUS))
3760 ttywrite("\033[O", 3);
3761 }
3762 }
3763
3764 bool
3765 match(uint mask, uint state) {
3766 return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
3767 }
3768
3769 void
3770 numlock(const Arg *dummy) {
3771 term.numlock ^= 1;
3772 }
3773
3774 char*
3775 kmap(KeySym k, uint state) {
3776 Key *kp;
3777 int i;
3778
3779 /* Check for mapped keys out of X11 function keys. */
3780 for(i = 0; i < LEN(mappedkeys); i++) {
3781 if(mappedkeys[i] == k)
3782 break;
3783 }
3784 if(i == LEN(mappedkeys)) {
3785 if((k & 0xFFFF) < 0xFD00)
3786 return NULL;
3787 }
3788
3789 for(kp = key; kp < key + LEN(key); kp++) {
3790 if(kp->k != k)
3791 continue;
3792
3793 if(!match(kp->mask, state))
3794 continue;
3795
3796 if(IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
3797 continue;
3798 if(term.numlock && kp->appkey == 2)
3799 continue;
3800
3801 if(IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
3802 continue;
3803
3804 if(IS_SET(MODE_CRLF) ? kp->crlf < 0 : kp->crlf > 0)
3805 continue;
3806
3807 return kp->s;
3808 }
3809
3810 return NULL;
3811 }
3812
3813 void
3814 kpress(XEvent *ev) {
3815 XKeyEvent *e = &ev->xkey;
3816 KeySym ksym;
3817 char buf[32], *customkey;
3818 int len;
3819 long c;
3820 Status status;
3821 Shortcut *bp;
3822
3823 if(IS_SET(MODE_KBDLOCK))
3824 return;
3825
3826 len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
3827 /* 1. shortcuts */
3828 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3829 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3830 bp->func(&(bp->arg));
3831 return;
3832 }
3833 }
3834
3835 /* 2. custom keys from config.h */
3836 if((customkey = kmap(ksym, e->state))) {
3837 ttysend(customkey, strlen(customkey));
3838 return;
3839 }
3840
3841 /* 3. composed string from input method */
3842 if(len == 0)
3843 return;
3844 if(len == 1 && e->state & Mod1Mask) {
3845 if(IS_SET(MODE_8BIT)) {
3846 if(*buf < 0177) {
3847 c = *buf | 0x80;
3848 len = utf8encode(c, buf);
3849 }
3850 } else {
3851 buf[1] = buf[0];
3852 buf[0] = '\033';
3853 len = 2;
3854 }
3855 }
3856 ttysend(buf, len);
3857 }
3858
3859
3860 void
3861 cmessage(XEvent *e) {
3862 /*
3863 * See xembed specs
3864 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3865 */
3866 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3867 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3868 xw.state |= WIN_FOCUSED;
3869 xseturgency(0);
3870 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3871 xw.state &= ~WIN_FOCUSED;
3872 }
3873 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3874 /* Send SIGHUP to shell */
3875 kill(pid, SIGHUP);
3876 exit(EXIT_SUCCESS);
3877 }
3878 }
3879
3880 void
3881 cresize(int width, int height) {
3882 int col, row;
3883
3884 if(width != 0)
3885 xw.w = width;
3886 if(height != 0)
3887 xw.h = height;
3888
3889 col = (xw.w - 2 * borderpx) / xw.cw;
3890 row = (xw.h - 2 * borderpx) / xw.ch;
3891
3892 tresize(col, row);
3893 xresize(col, row);
3894 ttyresize();
3895 }
3896
3897 void
3898 resize(XEvent *e) {
3899 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3900 return;
3901
3902 cresize(e->xconfigure.width, e->xconfigure.height);
3903 }
3904
3905 void
3906 run(void) {
3907 XEvent ev;
3908 int w = xw.w, h = xw.h;
3909 fd_set rfd;
3910 int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3911 struct timespec drawtimeout, *tv = NULL, now, last, lastblink;
3912 long deltatime;
3913
3914 /* Waiting for window mapping */
3915 do {
3916 XNextEvent(xw.dpy, &ev);
3917 if(ev.type == ConfigureNotify) {
3918 w = ev.xconfigure.width;
3919 h = ev.xconfigure.height;
3920 }
3921 } while(ev.type != MapNotify);
3922
3923 ttynew();
3924 cresize(w, h);
3925
3926 clock_gettime(CLOCK_MONOTONIC, &last);
3927 lastblink = last;
3928
3929 for(xev = actionfps;;) {
3930 FD_ZERO(&rfd);
3931 FD_SET(cmdfd, &rfd);
3932 FD_SET(xfd, &rfd);
3933
3934 if(pselect(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv, NULL) < 0) {
3935 if(errno == EINTR)
3936 continue;
3937 die("select failed: %s\n", strerror(errno));
3938 }
3939 if(FD_ISSET(cmdfd, &rfd)) {
3940 ttyread();
3941 if(blinktimeout) {
3942 blinkset = tattrset(ATTR_BLINK);
3943 if(!blinkset)
3944 MODBIT(term.mode, 0, MODE_BLINK);
3945 }
3946 }
3947
3948 if(FD_ISSET(xfd, &rfd))
3949 xev = actionfps;
3950
3951 clock_gettime(CLOCK_MONOTONIC, &now);
3952 drawtimeout.tv_sec = 0;
3953 drawtimeout.tv_nsec = (1000 * 1E6)/ xfps;
3954 tv = &drawtimeout;
3955
3956 dodraw = 0;
3957 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
3958 tsetdirtattr(ATTR_BLINK);
3959 term.mode ^= MODE_BLINK;
3960 lastblink = now;
3961 dodraw = 1;
3962 }
3963 deltatime = TIMEDIFF(now, last);
3964 if(deltatime > 1000 / (xev ? xfps : actionfps)) {
3965 dodraw = 1;
3966 last = now;
3967 }
3968
3969 if(dodraw) {
3970 while(XPending(xw.dpy)) {
3971 XNextEvent(xw.dpy, &ev);
3972 if(XFilterEvent(&ev, None))
3973 continue;
3974 if(handler[ev.type])
3975 (handler[ev.type])(&ev);
3976 }
3977
3978 draw();
3979 XFlush(xw.dpy);
3980
3981 if(xev && !FD_ISSET(xfd, &rfd))
3982 xev--;
3983 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
3984 if(blinkset) {
3985 if(TIMEDIFF(now, lastblink) \
3986 > blinktimeout) {
3987 drawtimeout.tv_nsec = 1000;
3988 } else {
3989 drawtimeout.tv_nsec = (1E6 * \
3990 (blinktimeout - \
3991 TIMEDIFF(now,
3992 lastblink)));
3993 }
3994 drawtimeout.tv_sec = \
3995 drawtimeout.tv_nsec / 1E9;
3996 drawtimeout.tv_nsec %= (long)1E9;
3997 } else {
3998 tv = NULL;
3999 }
4000 }
4001 }
4002 }
4003 }
4004
4005 void
4006 usage(void) {
4007 die("%s " VERSION " (c) 2010-2015 st engineers\n"
4008 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]\n"
4009 " [-i] [-t title] [-w windowid] [-e command ...] [command ...]\n"
4010 " st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]\n"
4011 " [-i] [-t title] [-w windowid] [-l line] [stty_args ...]\n",
4012 argv0);
4013 }
4014
4015 int
4016 main(int argc, char *argv[]) {
4017 uint cols = 80, rows = 24;
4018
4019 xw.l = xw.t = 0;
4020 xw.isfixed = False;
4021 xw.cursor = 0;
4022
4023 ARGBEGIN {
4024 case 'a':
4025 allowaltscreen = false;
4026 break;
4027 case 'c':
4028 opt_class = EARGF(usage());
4029 break;
4030 case 'e':
4031 if(argc > 1)
4032 --argc, ++argv;
4033 goto run;
4034 case 'f':
4035 opt_font = EARGF(usage());
4036 break;
4037 case 'g':
4038 xw.gm = XParseGeometry(EARGF(usage()),
4039 &xw.l, &xw.t, &cols, &rows);
4040 break;
4041 case 'i':
4042 xw.isfixed = True;
4043 break;
4044 case 'o':
4045 opt_io = EARGF(usage());
4046 break;
4047 case 'l':
4048 opt_line = EARGF(usage());
4049 break;
4050 case 't':
4051 opt_title = EARGF(usage());
4052 break;
4053 case 'w':
4054 opt_embed = EARGF(usage());
4055 break;
4056 case 'v':
4057 default:
4058 usage();
4059 } ARGEND;
4060
4061 run:
4062 if(argc > 0) {
4063 /* eat all remaining arguments */
4064 opt_cmd = argv;
4065 if(!opt_title && !opt_line)
4066 opt_title = basename(xstrdup(argv[0]));
4067 }
4068 setlocale(LC_CTYPE, "");
4069 XSetLocaleModifiers("");
4070 tnew(MAX(cols, 1), MAX(rows, 1));
4071 xinit();
4072 selinit();
4073 run();
4074
4075 return 0;
4076 }
4077