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87f3ed2bf262b891f702cc9c3f7f6d705613b802
[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 ushort fg; /* foreground */
187 ushort 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(long);
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(long, 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(long);
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);
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.nb.x, &sel.nb.y, -1);
699 selsnap(&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 *x, int *y, int direction) {
724 int newx, newy, xt, yt;
725 bool delim, prevdelim;
726 Glyph *gp, *prevgp;
727
728 switch(sel.snap) {
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 if(IS_SET(MODE_MOUSESGR)) {
864 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
865 button, x+1, y+1,
866 e->xbutton.type == ButtonRelease ? 'm' : 'M');
867 } else if(x < 223 && y < 223) {
868 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
869 32+button, 32+x+1, 32+y+1);
870 } else {
871 return;
872 }
873
874 ttywrite(buf, len);
875 }
876
877 void
878 bpress(XEvent *e) {
879 struct timespec now;
880 Mousekey *mk;
881
882 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
883 mousereport(e);
884 return;
885 }
886
887 for(mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
888 if(e->xbutton.button == mk->b
889 && match(mk->mask, e->xbutton.state)) {
890 ttysend(mk->s, strlen(mk->s));
891 return;
892 }
893 }
894
895 if(e->xbutton.button == Button1) {
896 clock_gettime(CLOCK_MONOTONIC, &now);
897
898 /* Clear previous selection, logically and visually. */
899 selclear(NULL);
900 sel.mode = 1;
901 sel.type = SEL_REGULAR;
902 sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
903 sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
904
905 /*
906 * If the user clicks below predefined timeouts specific
907 * snapping behaviour is exposed.
908 */
909 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
910 sel.snap = SNAP_LINE;
911 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
912 sel.snap = SNAP_WORD;
913 } else {
914 sel.snap = 0;
915 }
916 selnormalize();
917
918 /*
919 * Draw selection, unless it's regular and we don't want to
920 * make clicks visible
921 */
922 if(sel.snap != 0) {
923 sel.mode++;
924 tsetdirt(sel.nb.y, sel.ne.y);
925 }
926 sel.tclick2 = sel.tclick1;
927 sel.tclick1 = now;
928 }
929 }
930
931 char *
932 getsel(void) {
933 char *str, *ptr;
934 int y, bufsize, lastx, linelen;
935 Glyph *gp, *last;
936
937 if(sel.ob.x == -1)
938 return NULL;
939
940 bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
941 ptr = str = xmalloc(bufsize);
942
943 /* append every set & selected glyph to the selection */
944 for(y = sel.nb.y; y <= sel.ne.y; y++) {
945 linelen = tlinelen(y);
946
947 if(sel.type == SEL_RECTANGULAR) {
948 gp = &term.line[y][sel.nb.x];
949 lastx = sel.ne.x;
950 } else {
951 gp = &term.line[y][sel.nb.y == y ? sel.nb.x : 0];
952 lastx = (sel.ne.y == y) ? sel.ne.x : term.col-1;
953 }
954 last = &term.line[y][MIN(lastx, linelen-1)];
955 while(last >= gp && last->u == ' ')
956 --last;
957
958 for( ; gp <= last; ++gp) {
959 if(gp->mode & ATTR_WDUMMY)
960 continue;
961
962 ptr += utf8encode(gp->u, ptr);
963 }
964
965 /*
966 * Copy and pasting of line endings is inconsistent
967 * in the inconsistent terminal and GUI world.
968 * The best solution seems like to produce '\n' when
969 * something is copied from st and convert '\n' to
970 * '\r', when something to be pasted is received by
971 * st.
972 * FIXME: Fix the computer world.
973 */
974 if((y < sel.ne.y || lastx >= linelen) && !(last->mode & ATTR_WRAP))
975 *ptr++ = '\n';
976 }
977 *ptr = 0;
978 return str;
979 }
980
981 void
982 selcopy(Time t) {
983 xsetsel(getsel(), t);
984 }
985
986 void
987 selnotify(XEvent *e) {
988 ulong nitems, ofs, rem;
989 int format;
990 uchar *data, *last, *repl;
991 Atom type;
992 XSelectionEvent *xsev;
993
994 ofs = 0;
995 xsev = &e->xselection;
996 if (xsev->property == None)
997 return;
998 do {
999 if(XGetWindowProperty(xw.dpy, xw.win, xsev->property, ofs,
1000 BUFSIZ/4, False, AnyPropertyType,
1001 &type, &format, &nitems, &rem,
1002 &data)) {
1003 fprintf(stderr, "Clipboard allocation failed\n");
1004 return;
1005 }
1006
1007 /*
1008 * As seen in getsel:
1009 * Line endings are inconsistent in the terminal and GUI world
1010 * copy and pasting. When receiving some selection data,
1011 * replace all '\n' with '\r'.
1012 * FIXME: Fix the computer world.
1013 */
1014 repl = data;
1015 last = data + nitems * format / 8;
1016 while((repl = memchr(repl, '\n', last - repl))) {
1017 *repl++ = '\r';
1018 }
1019
1020 if(IS_SET(MODE_BRCKTPASTE))
1021 ttywrite("\033[200~", 6);
1022 ttysend((char *)data, nitems * format / 8);
1023 if(IS_SET(MODE_BRCKTPASTE))
1024 ttywrite("\033[201~", 6);
1025 XFree(data);
1026 /* number of 32-bit chunks returned */
1027 ofs += nitems * format / 32;
1028 } while(rem > 0);
1029 }
1030
1031 void
1032 selpaste(const Arg *dummy) {
1033 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
1034 xw.win, CurrentTime);
1035 }
1036
1037 void
1038 clipcopy(const Arg *dummy) {
1039 Atom clipboard;
1040
1041 if(sel.clipboard != NULL)
1042 free(sel.clipboard);
1043
1044 if(sel.primary != NULL) {
1045 sel.clipboard = xstrdup(sel.primary);
1046 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1047 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
1048 }
1049 }
1050
1051 void
1052 clippaste(const Arg *dummy) {
1053 Atom clipboard;
1054
1055 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1056 XConvertSelection(xw.dpy, clipboard, sel.xtarget, clipboard,
1057 xw.win, CurrentTime);
1058 }
1059
1060 void
1061 selclear(XEvent *e) {
1062 if(sel.ob.x == -1)
1063 return;
1064 sel.ob.x = -1;
1065 tsetdirt(sel.nb.y, sel.ne.y);
1066 }
1067
1068 void
1069 selrequest(XEvent *e) {
1070 XSelectionRequestEvent *xsre;
1071 XSelectionEvent xev;
1072 Atom xa_targets, string, clipboard;
1073 char *seltext;
1074
1075 xsre = (XSelectionRequestEvent *) e;
1076 xev.type = SelectionNotify;
1077 xev.requestor = xsre->requestor;
1078 xev.selection = xsre->selection;
1079 xev.target = xsre->target;
1080 xev.time = xsre->time;
1081 if (xsre->property == None)
1082 xsre->property = xsre->target;
1083
1084 /* reject */
1085 xev.property = None;
1086
1087 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
1088 if(xsre->target == xa_targets) {
1089 /* respond with the supported type */
1090 string = sel.xtarget;
1091 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1092 XA_ATOM, 32, PropModeReplace,
1093 (uchar *) &string, 1);
1094 xev.property = xsre->property;
1095 } else if(xsre->target == sel.xtarget || xsre->target == XA_STRING) {
1096 /*
1097 * xith XA_STRING non ascii characters may be incorrect in the
1098 * requestor. It is not our problem, use utf8.
1099 */
1100 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1101 if(xsre->selection == XA_PRIMARY) {
1102 seltext = sel.primary;
1103 } else if(xsre->selection == clipboard) {
1104 seltext = sel.clipboard;
1105 } else {
1106 fprintf(stderr,
1107 "Unhandled clipboard selection 0x%lx\n",
1108 xsre->selection);
1109 return;
1110 }
1111 if(seltext != NULL) {
1112 XChangeProperty(xsre->display, xsre->requestor,
1113 xsre->property, xsre->target,
1114 8, PropModeReplace,
1115 (uchar *)seltext, strlen(seltext));
1116 xev.property = xsre->property;
1117 }
1118 }
1119
1120 /* all done, send a notification to the listener */
1121 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
1122 fprintf(stderr, "Error sending SelectionNotify event\n");
1123 }
1124
1125 void
1126 xsetsel(char *str, Time t) {
1127 free(sel.primary);
1128 sel.primary = str;
1129
1130 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, t);
1131 if (XGetSelectionOwner(xw.dpy, XA_PRIMARY) != xw.win)
1132 selclear(0);
1133 }
1134
1135 void
1136 brelease(XEvent *e) {
1137 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1138 mousereport(e);
1139 return;
1140 }
1141
1142 if(e->xbutton.button == Button2) {
1143 selpaste(NULL);
1144 } else if(e->xbutton.button == Button1) {
1145 if(sel.mode < 2) {
1146 selclear(NULL);
1147 } else {
1148 getbuttoninfo(e);
1149 selcopy(e->xbutton.time);
1150 }
1151 sel.mode = 0;
1152 tsetdirt(sel.nb.y, sel.ne.y);
1153 }
1154 }
1155
1156 void
1157 bmotion(XEvent *e) {
1158 int oldey, oldex, oldsby, oldsey;
1159
1160 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1161 mousereport(e);
1162 return;
1163 }
1164
1165 if(!sel.mode)
1166 return;
1167
1168 sel.mode++;
1169 oldey = sel.oe.y;
1170 oldex = sel.oe.x;
1171 oldsby = sel.nb.y;
1172 oldsey = sel.ne.y;
1173 getbuttoninfo(e);
1174
1175 if(oldey != sel.oe.y || oldex != sel.oe.x)
1176 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
1177 }
1178
1179 void
1180 die(const char *errstr, ...) {
1181 va_list ap;
1182
1183 va_start(ap, errstr);
1184 vfprintf(stderr, errstr, ap);
1185 va_end(ap);
1186 exit(EXIT_FAILURE);
1187 }
1188
1189 void
1190 execsh(void) {
1191 char **args, *sh, *prog;
1192 const struct passwd *pw;
1193 char buf[sizeof(long) * 8 + 1];
1194
1195 errno = 0;
1196 if((pw = getpwuid(getuid())) == NULL) {
1197 if(errno)
1198 die("getpwuid:%s\n", strerror(errno));
1199 else
1200 die("who are you?\n");
1201 }
1202
1203 if (!(sh = getenv("SHELL"))) {
1204 sh = (pw->pw_shell[0]) ? pw->pw_shell : shell;
1205 }
1206
1207 if(opt_cmd)
1208 prog = opt_cmd[0];
1209 else if(utmp)
1210 prog = utmp;
1211 else
1212 prog = sh;
1213 args = (opt_cmd) ? opt_cmd : (char *[]) {prog, NULL};
1214
1215 snprintf(buf, sizeof(buf), "%lu", xw.win);
1216
1217 unsetenv("COLUMNS");
1218 unsetenv("LINES");
1219 unsetenv("TERMCAP");
1220 setenv("LOGNAME", pw->pw_name, 1);
1221 setenv("USER", pw->pw_name, 1);
1222 setenv("SHELL", sh, 1);
1223 setenv("HOME", pw->pw_dir, 1);
1224 setenv("TERM", termname, 1);
1225 setenv("WINDOWID", buf, 1);
1226
1227 signal(SIGCHLD, SIG_DFL);
1228 signal(SIGHUP, SIG_DFL);
1229 signal(SIGINT, SIG_DFL);
1230 signal(SIGQUIT, SIG_DFL);
1231 signal(SIGTERM, SIG_DFL);
1232 signal(SIGALRM, SIG_DFL);
1233
1234 execvp(prog, args);
1235 _exit(EXIT_FAILURE);
1236 }
1237
1238 void
1239 sigchld(int a) {
1240 int stat, ret;
1241 pid_t p;
1242
1243 if((p = waitpid(pid, &stat, WNOHANG)) < 0)
1244 die("Waiting for pid %hd failed: %s\n", pid, strerror(errno));
1245
1246 if(pid != p)
1247 return;
1248
1249 ret = WIFEXITED(stat) ? WEXITSTATUS(stat) : EXIT_FAILURE;
1250 if (ret != EXIT_SUCCESS)
1251 die("child finished with error '%d'\n", stat);
1252 exit(EXIT_SUCCESS);
1253 }
1254
1255
1256 void
1257 stty(void)
1258 {
1259 char cmd[_POSIX_ARG_MAX], **p, *q, *s;
1260 size_t n, siz;
1261
1262 if((n = strlen(stty_args)) > sizeof(cmd)-1)
1263 die("incorrect stty parameters\n");
1264 memcpy(cmd, stty_args, n);
1265 q = cmd + n;
1266 siz = sizeof(cmd) - n;
1267 for(p = opt_cmd; p && (s = *p); ++p) {
1268 if((n = strlen(s)) > siz-1)
1269 die("stty parameter length too long\n");
1270 *q++ = ' ';
1271 q = memcpy(q, s, n);
1272 q += n;
1273 siz-= n + 1;
1274 }
1275 *q = '\0';
1276 if (system(cmd) != 0)
1277 perror("Couldn't call stty");
1278 }
1279
1280 void
1281 ttynew(void) {
1282 int m, s;
1283 struct winsize w = {term.row, term.col, 0, 0};
1284
1285 if(opt_io) {
1286 term.mode |= MODE_PRINT;
1287 iofd = (!strcmp(opt_io, "-")) ?
1288 STDOUT_FILENO :
1289 open(opt_io, O_WRONLY | O_CREAT, 0666);
1290 if(iofd < 0) {
1291 fprintf(stderr, "Error opening %s:%s\n",
1292 opt_io, strerror(errno));
1293 }
1294 }
1295
1296 if (opt_line) {
1297 if((cmdfd = open(opt_line, O_RDWR)) < 0)
1298 die("open line failed: %s\n", strerror(errno));
1299 close(STDIN_FILENO);
1300 dup(cmdfd);
1301 stty();
1302 return;
1303 }
1304
1305 /* seems to work fine on linux, openbsd and freebsd */
1306 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1307 die("openpty failed: %s\n", strerror(errno));
1308
1309 switch(pid = fork()) {
1310 case -1:
1311 die("fork failed\n");
1312 break;
1313 case 0:
1314 close(iofd);
1315 setsid(); /* create a new process group */
1316 dup2(s, STDIN_FILENO);
1317 dup2(s, STDOUT_FILENO);
1318 dup2(s, STDERR_FILENO);
1319 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1320 die("ioctl TIOCSCTTY failed: %s\n", strerror(errno));
1321 close(s);
1322 close(m);
1323 execsh();
1324 break;
1325 default:
1326 close(s);
1327 cmdfd = m;
1328 signal(SIGCHLD, sigchld);
1329 break;
1330 }
1331 }
1332
1333 void
1334 ttyread(void) {
1335 static char buf[BUFSIZ];
1336 static int buflen = 0;
1337 char *ptr;
1338 int charsize; /* size of utf8 char in bytes */
1339 long unicodep;
1340 int ret;
1341
1342 /* append read bytes to unprocessed bytes */
1343 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1344 die("Couldn't read from shell: %s\n", strerror(errno));
1345
1346 /* process every complete utf8 char */
1347 buflen += ret;
1348 ptr = buf;
1349 while((charsize = utf8decode(ptr, &unicodep, buflen))) {
1350 tputc(unicodep);
1351 ptr += charsize;
1352 buflen -= charsize;
1353 }
1354
1355 /* keep any uncomplete utf8 char for the next call */
1356 memmove(buf, ptr, buflen);
1357 }
1358
1359 void
1360 ttywrite(const char *s, size_t n) {
1361 if(xwrite(cmdfd, s, n) == -1)
1362 die("write error on tty: %s\n", strerror(errno));
1363 }
1364
1365 void
1366 ttysend(char *s, size_t n) {
1367 int len;
1368 long u;
1369
1370 ttywrite(s, n);
1371 if(IS_SET(MODE_ECHO))
1372 while((len = utf8decode(s, &u, n)) > 0) {
1373 techo(u);
1374 n -= len;
1375 s += len;
1376 }
1377 }
1378
1379 void
1380 ttyresize(void) {
1381 struct winsize w;
1382
1383 w.ws_row = term.row;
1384 w.ws_col = term.col;
1385 w.ws_xpixel = xw.tw;
1386 w.ws_ypixel = xw.th;
1387 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1388 fprintf(stderr, "Couldn't set window size: %s\n", strerror(errno));
1389 }
1390
1391 int
1392 tattrset(int attr) {
1393 int i, j;
1394
1395 for(i = 0; i < term.row-1; i++) {
1396 for(j = 0; j < term.col-1; j++) {
1397 if(term.line[i][j].mode & attr)
1398 return 1;
1399 }
1400 }
1401
1402 return 0;
1403 }
1404
1405 void
1406 tsetdirt(int top, int bot) {
1407 int i;
1408
1409 LIMIT(top, 0, term.row-1);
1410 LIMIT(bot, 0, term.row-1);
1411
1412 for(i = top; i <= bot; i++)
1413 term.dirty[i] = 1;
1414 }
1415
1416 void
1417 tsetdirtattr(int attr) {
1418 int i, j;
1419
1420 for(i = 0; i < term.row-1; i++) {
1421 for(j = 0; j < term.col-1; j++) {
1422 if(term.line[i][j].mode & attr) {
1423 tsetdirt(i, i);
1424 break;
1425 }
1426 }
1427 }
1428 }
1429
1430 void
1431 tfulldirt(void) {
1432 tsetdirt(0, term.row-1);
1433 }
1434
1435 void
1436 tcursor(int mode) {
1437 static TCursor c[2];
1438 bool alt = IS_SET(MODE_ALTSCREEN);
1439
1440 if(mode == CURSOR_SAVE) {
1441 c[alt] = term.c;
1442 } else if(mode == CURSOR_LOAD) {
1443 term.c = c[alt];
1444 tmoveto(c[alt].x, c[alt].y);
1445 }
1446 }
1447
1448 void
1449 treset(void) {
1450 uint i;
1451
1452 term.c = (TCursor){{
1453 .mode = ATTR_NULL,
1454 .fg = defaultfg,
1455 .bg = defaultbg
1456 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1457
1458 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1459 for(i = tabspaces; i < term.col; i += tabspaces)
1460 term.tabs[i] = 1;
1461 term.top = 0;
1462 term.bot = term.row - 1;
1463 term.mode = MODE_WRAP;
1464 memset(term.trantbl, CS_USA, sizeof(term.trantbl));
1465 term.charset = 0;
1466
1467 for(i = 0; i < 2; i++) {
1468 tmoveto(0, 0);
1469 tcursor(CURSOR_SAVE);
1470 tclearregion(0, 0, term.col-1, term.row-1);
1471 tswapscreen();
1472 }
1473 }
1474
1475 void
1476 tnew(int col, int row) {
1477 term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } };
1478 tresize(col, row);
1479 term.numlock = 1;
1480
1481 treset();
1482 }
1483
1484 void
1485 tswapscreen(void) {
1486 Line *tmp = term.line;
1487
1488 term.line = term.alt;
1489 term.alt = tmp;
1490 term.mode ^= MODE_ALTSCREEN;
1491 tfulldirt();
1492 }
1493
1494 void
1495 tscrolldown(int orig, int n) {
1496 int i;
1497 Line temp;
1498
1499 LIMIT(n, 0, term.bot-orig+1);
1500
1501 tsetdirt(orig, term.bot-n);
1502 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1503
1504 for(i = term.bot; i >= orig+n; i--) {
1505 temp = term.line[i];
1506 term.line[i] = term.line[i-n];
1507 term.line[i-n] = temp;
1508 }
1509
1510 selscroll(orig, n);
1511 }
1512
1513 void
1514 tscrollup(int orig, int n) {
1515 int i;
1516 Line temp;
1517
1518 LIMIT(n, 0, term.bot-orig+1);
1519
1520 tclearregion(0, orig, term.col-1, orig+n-1);
1521 tsetdirt(orig+n, term.bot);
1522
1523 for(i = orig; i <= term.bot-n; i++) {
1524 temp = term.line[i];
1525 term.line[i] = term.line[i+n];
1526 term.line[i+n] = temp;
1527 }
1528
1529 selscroll(orig, -n);
1530 }
1531
1532 void
1533 selscroll(int orig, int n) {
1534 if(sel.ob.x == -1)
1535 return;
1536
1537 if(BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
1538 if((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
1539 selclear(NULL);
1540 return;
1541 }
1542 if(sel.type == SEL_RECTANGULAR) {
1543 if(sel.ob.y < term.top)
1544 sel.ob.y = term.top;
1545 if(sel.oe.y > term.bot)
1546 sel.oe.y = term.bot;
1547 } else {
1548 if(sel.ob.y < term.top) {
1549 sel.ob.y = term.top;
1550 sel.ob.x = 0;
1551 }
1552 if(sel.oe.y > term.bot) {
1553 sel.oe.y = term.bot;
1554 sel.oe.x = term.col;
1555 }
1556 }
1557 selnormalize();
1558 }
1559 }
1560
1561 void
1562 tnewline(int first_col) {
1563 int y = term.c.y;
1564
1565 if(y == term.bot) {
1566 tscrollup(term.top, 1);
1567 } else {
1568 y++;
1569 }
1570 tmoveto(first_col ? 0 : term.c.x, y);
1571 }
1572
1573 void
1574 csiparse(void) {
1575 char *p = csiescseq.buf, *np;
1576 long int v;
1577
1578 csiescseq.narg = 0;
1579 if(*p == '?') {
1580 csiescseq.priv = 1;
1581 p++;
1582 }
1583
1584 csiescseq.buf[csiescseq.len] = '\0';
1585 while(p < csiescseq.buf+csiescseq.len) {
1586 np = NULL;
1587 v = strtol(p, &np, 10);
1588 if(np == p)
1589 v = 0;
1590 if(v == LONG_MAX || v == LONG_MIN)
1591 v = -1;
1592 csiescseq.arg[csiescseq.narg++] = v;
1593 p = np;
1594 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1595 break;
1596 p++;
1597 }
1598 csiescseq.mode[0] = *p++;
1599 csiescseq.mode[1] = (p < csiescseq.buf+csiescseq.len) ? *p : '\0';
1600 }
1601
1602 /* for absolute user moves, when decom is set */
1603 void
1604 tmoveato(int x, int y) {
1605 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1606 }
1607
1608 void
1609 tmoveto(int x, int y) {
1610 int miny, maxy;
1611
1612 if(term.c.state & CURSOR_ORIGIN) {
1613 miny = term.top;
1614 maxy = term.bot;
1615 } else {
1616 miny = 0;
1617 maxy = term.row - 1;
1618 }
1619 term.c.state &= ~CURSOR_WRAPNEXT;
1620 term.c.x = LIMIT(x, 0, term.col-1);
1621 term.c.y = LIMIT(y, miny, maxy);
1622 }
1623
1624 void
1625 tsetchar(long u, Glyph *attr, int x, int y) {
1626 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1627 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1628 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1629 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1630 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1631 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1632 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1633 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1634 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1635 };
1636
1637 /*
1638 * The table is proudly stolen from rxvt.
1639 */
1640 if(term.trantbl[term.charset] == CS_GRAPHIC0 &&
1641 BETWEEN(u, 0x41, 0x7e) && vt100_0[u - 0x41])
1642 utf8decode(vt100_0[u - 0x41], &u, UTF_SIZ);
1643
1644 if(term.line[y][x].mode & ATTR_WIDE) {
1645 if(x+1 < term.col) {
1646 term.line[y][x+1].u = ' ';
1647 term.line[y][x+1].mode &= ~ATTR_WDUMMY;
1648 }
1649 } else if(term.line[y][x].mode & ATTR_WDUMMY) {
1650 term.line[y][x-1].u = ' ';
1651 term.line[y][x-1].mode &= ~ATTR_WIDE;
1652 }
1653
1654 term.dirty[y] = 1;
1655 term.line[y][x] = *attr;
1656 term.line[y][x].u = u;
1657 }
1658
1659 void
1660 tclearregion(int x1, int y1, int x2, int y2) {
1661 int x, y, temp;
1662 Glyph *gp;
1663
1664 if(x1 > x2)
1665 temp = x1, x1 = x2, x2 = temp;
1666 if(y1 > y2)
1667 temp = y1, y1 = y2, y2 = temp;
1668
1669 LIMIT(x1, 0, term.col-1);
1670 LIMIT(x2, 0, term.col-1);
1671 LIMIT(y1, 0, term.row-1);
1672 LIMIT(y2, 0, term.row-1);
1673
1674 for(y = y1; y <= y2; y++) {
1675 term.dirty[y] = 1;
1676 for(x = x1; x <= x2; x++) {
1677 gp = &term.line[y][x];
1678 if(selected(x, y))
1679 selclear(NULL);
1680 gp->fg = term.c.attr.fg;
1681 gp->bg = term.c.attr.bg;
1682 gp->mode = 0;
1683 gp->u = ' ';
1684 }
1685 }
1686 }
1687
1688 void
1689 tdeletechar(int n) {
1690 int dst, src, size;
1691 Glyph *line;
1692
1693 LIMIT(n, 0, term.col - term.c.x);
1694
1695 dst = term.c.x;
1696 src = term.c.x + n;
1697 size = term.col - src;
1698 line = term.line[term.c.y];
1699
1700 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1701 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1702 }
1703
1704 void
1705 tinsertblank(int n) {
1706 int dst, src, size;
1707 Glyph *line;
1708
1709 LIMIT(n, 0, term.col - term.c.x);
1710
1711 dst = term.c.x + n;
1712 src = term.c.x;
1713 size = term.col - dst;
1714 line = term.line[term.c.y];
1715
1716 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1717 tclearregion(src, term.c.y, dst - 1, term.c.y);
1718 }
1719
1720 void
1721 tinsertblankline(int n) {
1722 if(BETWEEN(term.c.y, term.top, term.bot))
1723 tscrolldown(term.c.y, n);
1724 }
1725
1726 void
1727 tdeleteline(int n) {
1728 if(BETWEEN(term.c.y, term.top, term.bot))
1729 tscrollup(term.c.y, n);
1730 }
1731
1732 int32_t
1733 tdefcolor(int *attr, int *npar, int l) {
1734 int32_t idx = -1;
1735 uint r, g, b;
1736
1737 switch (attr[*npar + 1]) {
1738 case 2: /* direct color in RGB space */
1739 if (*npar + 4 >= l) {
1740 fprintf(stderr,
1741 "erresc(38): Incorrect number of parameters (%d)\n",
1742 *npar);
1743 break;
1744 }
1745 r = attr[*npar + 2];
1746 g = attr[*npar + 3];
1747 b = attr[*npar + 4];
1748 *npar += 4;
1749 if(!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
1750 fprintf(stderr, "erresc: bad rgb color (%u,%u,%u)\n",
1751 r, g, b);
1752 else
1753 idx = TRUECOLOR(r, g, b);
1754 break;
1755 case 5: /* indexed color */
1756 if (*npar + 2 >= l) {
1757 fprintf(stderr,
1758 "erresc(38): Incorrect number of parameters (%d)\n",
1759 *npar);
1760 break;
1761 }
1762 *npar += 2;
1763 if(!BETWEEN(attr[*npar], 0, 255))
1764 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
1765 else
1766 idx = attr[*npar];
1767 break;
1768 case 0: /* implemented defined (only foreground) */
1769 case 1: /* transparent */
1770 case 3: /* direct color in CMY space */
1771 case 4: /* direct color in CMYK space */
1772 default:
1773 fprintf(stderr,
1774 "erresc(38): gfx attr %d unknown\n", attr[*npar]);
1775 break;
1776 }
1777
1778 return idx;
1779 }
1780
1781 void
1782 tsetattr(int *attr, int l) {
1783 int i;
1784 int32_t idx;
1785
1786 for(i = 0; i < l; i++) {
1787 switch(attr[i]) {
1788 case 0:
1789 term.c.attr.mode &= ~(
1790 ATTR_BOLD |
1791 ATTR_FAINT |
1792 ATTR_ITALIC |
1793 ATTR_UNDERLINE |
1794 ATTR_BLINK |
1795 ATTR_REVERSE |
1796 ATTR_INVISIBLE |
1797 ATTR_STRUCK );
1798 term.c.attr.fg = defaultfg;
1799 term.c.attr.bg = defaultbg;
1800 break;
1801 case 1:
1802 term.c.attr.mode |= ATTR_BOLD;
1803 break;
1804 case 2:
1805 term.c.attr.mode |= ATTR_FAINT;
1806 break;
1807 case 3:
1808 term.c.attr.mode |= ATTR_ITALIC;
1809 break;
1810 case 4:
1811 term.c.attr.mode |= ATTR_UNDERLINE;
1812 break;
1813 case 5: /* slow blink */
1814 /* FALLTHROUGH */
1815 case 6: /* rapid blink */
1816 term.c.attr.mode |= ATTR_BLINK;
1817 break;
1818 case 7:
1819 term.c.attr.mode |= ATTR_REVERSE;
1820 break;
1821 case 8:
1822 term.c.attr.mode |= ATTR_INVISIBLE;
1823 break;
1824 case 9:
1825 term.c.attr.mode |= ATTR_STRUCK;
1826 break;
1827 case 22:
1828 term.c.attr.mode &= ~(ATTR_BOLD | ATTR_FAINT);
1829 break;
1830 case 23:
1831 term.c.attr.mode &= ~ATTR_ITALIC;
1832 break;
1833 case 24:
1834 term.c.attr.mode &= ~ATTR_UNDERLINE;
1835 break;
1836 case 25:
1837 term.c.attr.mode &= ~ATTR_BLINK;
1838 break;
1839 case 27:
1840 term.c.attr.mode &= ~ATTR_REVERSE;
1841 break;
1842 case 28:
1843 term.c.attr.mode &= ~ATTR_INVISIBLE;
1844 break;
1845 case 29:
1846 term.c.attr.mode &= ~ATTR_STRUCK;
1847 break;
1848 case 38:
1849 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1850 term.c.attr.fg = idx;
1851 break;
1852 case 39:
1853 term.c.attr.fg = defaultfg;
1854 break;
1855 case 48:
1856 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1857 term.c.attr.bg = idx;
1858 break;
1859 case 49:
1860 term.c.attr.bg = defaultbg;
1861 break;
1862 default:
1863 if(BETWEEN(attr[i], 30, 37)) {
1864 term.c.attr.fg = attr[i] - 30;
1865 } else if(BETWEEN(attr[i], 40, 47)) {
1866 term.c.attr.bg = attr[i] - 40;
1867 } else if(BETWEEN(attr[i], 90, 97)) {
1868 term.c.attr.fg = attr[i] - 90 + 8;
1869 } else if(BETWEEN(attr[i], 100, 107)) {
1870 term.c.attr.bg = attr[i] - 100 + 8;
1871 } else {
1872 fprintf(stderr,
1873 "erresc(default): gfx attr %d unknown\n",
1874 attr[i]), csidump();
1875 }
1876 break;
1877 }
1878 }
1879 }
1880
1881 void
1882 tsetscroll(int t, int b) {
1883 int temp;
1884
1885 LIMIT(t, 0, term.row-1);
1886 LIMIT(b, 0, term.row-1);
1887 if(t > b) {
1888 temp = t;
1889 t = b;
1890 b = temp;
1891 }
1892 term.top = t;
1893 term.bot = b;
1894 }
1895
1896 void
1897 tsetmode(bool priv, bool set, int *args, int narg) {
1898 int *lim, mode;
1899 bool alt;
1900
1901 for(lim = args + narg; args < lim; ++args) {
1902 if(priv) {
1903 switch(*args) {
1904 case 1: /* DECCKM -- Cursor key */
1905 MODBIT(term.mode, set, MODE_APPCURSOR);
1906 break;
1907 case 5: /* DECSCNM -- Reverse video */
1908 mode = term.mode;
1909 MODBIT(term.mode, set, MODE_REVERSE);
1910 if(mode != term.mode)
1911 redraw();
1912 break;
1913 case 6: /* DECOM -- Origin */
1914 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1915 tmoveato(0, 0);
1916 break;
1917 case 7: /* DECAWM -- Auto wrap */
1918 MODBIT(term.mode, set, MODE_WRAP);
1919 break;
1920 case 0: /* Error (IGNORED) */
1921 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1922 case 3: /* DECCOLM -- Column (IGNORED) */
1923 case 4: /* DECSCLM -- Scroll (IGNORED) */
1924 case 8: /* DECARM -- Auto repeat (IGNORED) */
1925 case 18: /* DECPFF -- Printer feed (IGNORED) */
1926 case 19: /* DECPEX -- Printer extent (IGNORED) */
1927 case 42: /* DECNRCM -- National characters (IGNORED) */
1928 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1929 break;
1930 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1931 MODBIT(term.mode, !set, MODE_HIDE);
1932 break;
1933 case 9: /* X10 mouse compatibility mode */
1934 xsetpointermotion(0);
1935 MODBIT(term.mode, 0, MODE_MOUSE);
1936 MODBIT(term.mode, set, MODE_MOUSEX10);
1937 break;
1938 case 1000: /* 1000: report button press */
1939 xsetpointermotion(0);
1940 MODBIT(term.mode, 0, MODE_MOUSE);
1941 MODBIT(term.mode, set, MODE_MOUSEBTN);
1942 break;
1943 case 1002: /* 1002: report motion on button press */
1944 xsetpointermotion(0);
1945 MODBIT(term.mode, 0, MODE_MOUSE);
1946 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1947 break;
1948 case 1003: /* 1003: enable all mouse motions */
1949 xsetpointermotion(set);
1950 MODBIT(term.mode, 0, MODE_MOUSE);
1951 MODBIT(term.mode, set, MODE_MOUSEMANY);
1952 break;
1953 case 1004: /* 1004: send focus events to tty */
1954 MODBIT(term.mode, set, MODE_FOCUS);
1955 break;
1956 case 1006: /* 1006: extended reporting mode */
1957 MODBIT(term.mode, set, MODE_MOUSESGR);
1958 break;
1959 case 1034:
1960 MODBIT(term.mode, set, MODE_8BIT);
1961 break;
1962 case 1049: /* swap screen & set/restore cursor as xterm */
1963 if (!allowaltscreen)
1964 break;
1965 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1966 /* FALLTHROUGH */
1967 case 47: /* swap screen */
1968 case 1047:
1969 if (!allowaltscreen)
1970 break;
1971 alt = IS_SET(MODE_ALTSCREEN);
1972 if(alt) {
1973 tclearregion(0, 0, term.col-1,
1974 term.row-1);
1975 }
1976 if(set ^ alt) /* set is always 1 or 0 */
1977 tswapscreen();
1978 if(*args != 1049)
1979 break;
1980 /* FALLTHROUGH */
1981 case 1048:
1982 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1983 break;
1984 case 2004: /* 2004: bracketed paste mode */
1985 MODBIT(term.mode, set, MODE_BRCKTPASTE);
1986 break;
1987 /* Not implemented mouse modes. See comments there. */
1988 case 1001: /* mouse highlight mode; can hang the
1989 terminal by design when implemented. */
1990 case 1005: /* UTF-8 mouse mode; will confuse
1991 applications not supporting UTF-8
1992 and luit. */
1993 case 1015: /* urxvt mangled mouse mode; incompatible
1994 and can be mistaken for other control
1995 codes. */
1996 default:
1997 fprintf(stderr,
1998 "erresc: unknown private set/reset mode %d\n",
1999 *args);
2000 break;
2001 }
2002 } else {
2003 switch(*args) {
2004 case 0: /* Error (IGNORED) */
2005 break;
2006 case 2: /* KAM -- keyboard action */
2007 MODBIT(term.mode, set, MODE_KBDLOCK);
2008 break;
2009 case 4: /* IRM -- Insertion-replacement */
2010 MODBIT(term.mode, set, MODE_INSERT);
2011 break;
2012 case 12: /* SRM -- Send/Receive */
2013 MODBIT(term.mode, !set, MODE_ECHO);
2014 break;
2015 case 20: /* LNM -- Linefeed/new line */
2016 MODBIT(term.mode, set, MODE_CRLF);
2017 break;
2018 default:
2019 fprintf(stderr,
2020 "erresc: unknown set/reset mode %d\n",
2021 *args);
2022 break;
2023 }
2024 }
2025 }
2026 }
2027
2028 void
2029 csihandle(void) {
2030 char buf[40];
2031 int len;
2032
2033 switch(csiescseq.mode[0]) {
2034 default:
2035 unknown:
2036 fprintf(stderr, "erresc: unknown csi ");
2037 csidump();
2038 /* die(""); */
2039 break;
2040 case '@': /* ICH -- Insert <n> blank char */
2041 DEFAULT(csiescseq.arg[0], 1);
2042 tinsertblank(csiescseq.arg[0]);
2043 break;
2044 case 'A': /* CUU -- Cursor <n> Up */
2045 DEFAULT(csiescseq.arg[0], 1);
2046 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
2047 break;
2048 case 'B': /* CUD -- Cursor <n> Down */
2049 case 'e': /* VPR --Cursor <n> Down */
2050 DEFAULT(csiescseq.arg[0], 1);
2051 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
2052 break;
2053 case 'i': /* MC -- Media Copy */
2054 switch(csiescseq.arg[0]) {
2055 case 0:
2056 tdump();
2057 break;
2058 case 1:
2059 tdumpline(term.c.y);
2060 break;
2061 case 2:
2062 tdumpsel();
2063 break;
2064 case 4:
2065 term.mode &= ~MODE_PRINT;
2066 break;
2067 case 5:
2068 term.mode |= MODE_PRINT;
2069 break;
2070 }
2071 break;
2072 case 'c': /* DA -- Device Attributes */
2073 if(csiescseq.arg[0] == 0)
2074 ttywrite(vtiden, sizeof(vtiden) - 1);
2075 break;
2076 case 'C': /* CUF -- Cursor <n> Forward */
2077 case 'a': /* HPR -- Cursor <n> Forward */
2078 DEFAULT(csiescseq.arg[0], 1);
2079 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
2080 break;
2081 case 'D': /* CUB -- Cursor <n> Backward */
2082 DEFAULT(csiescseq.arg[0], 1);
2083 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
2084 break;
2085 case 'E': /* CNL -- Cursor <n> Down and first col */
2086 DEFAULT(csiescseq.arg[0], 1);
2087 tmoveto(0, term.c.y+csiescseq.arg[0]);
2088 break;
2089 case 'F': /* CPL -- Cursor <n> Up and first col */
2090 DEFAULT(csiescseq.arg[0], 1);
2091 tmoveto(0, term.c.y-csiescseq.arg[0]);
2092 break;
2093 case 'g': /* TBC -- Tabulation clear */
2094 switch(csiescseq.arg[0]) {
2095 case 0: /* clear current tab stop */
2096 term.tabs[term.c.x] = 0;
2097 break;
2098 case 3: /* clear all the tabs */
2099 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
2100 break;
2101 default:
2102 goto unknown;
2103 }
2104 break;
2105 case 'G': /* CHA -- Move to <col> */
2106 case '`': /* HPA */
2107 DEFAULT(csiescseq.arg[0], 1);
2108 tmoveto(csiescseq.arg[0]-1, term.c.y);
2109 break;
2110 case 'H': /* CUP -- Move to <row> <col> */
2111 case 'f': /* HVP */
2112 DEFAULT(csiescseq.arg[0], 1);
2113 DEFAULT(csiescseq.arg[1], 1);
2114 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
2115 break;
2116 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
2117 DEFAULT(csiescseq.arg[0], 1);
2118 tputtab(csiescseq.arg[0]);
2119 break;
2120 case 'J': /* ED -- Clear screen */
2121 selclear(NULL);
2122 switch(csiescseq.arg[0]) {
2123 case 0: /* below */
2124 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
2125 if(term.c.y < term.row-1) {
2126 tclearregion(0, term.c.y+1, term.col-1,
2127 term.row-1);
2128 }
2129 break;
2130 case 1: /* above */
2131 if(term.c.y > 1)
2132 tclearregion(0, 0, term.col-1, term.c.y-1);
2133 tclearregion(0, term.c.y, term.c.x, term.c.y);
2134 break;
2135 case 2: /* all */
2136 tclearregion(0, 0, term.col-1, term.row-1);
2137 break;
2138 default:
2139 goto unknown;
2140 }
2141 break;
2142 case 'K': /* EL -- Clear line */
2143 switch(csiescseq.arg[0]) {
2144 case 0: /* right */
2145 tclearregion(term.c.x, term.c.y, term.col-1,
2146 term.c.y);
2147 break;
2148 case 1: /* left */
2149 tclearregion(0, term.c.y, term.c.x, term.c.y);
2150 break;
2151 case 2: /* all */
2152 tclearregion(0, term.c.y, term.col-1, term.c.y);
2153 break;
2154 }
2155 break;
2156 case 'S': /* SU -- Scroll <n> line up */
2157 DEFAULT(csiescseq.arg[0], 1);
2158 tscrollup(term.top, csiescseq.arg[0]);
2159 break;
2160 case 'T': /* SD -- Scroll <n> line down */
2161 DEFAULT(csiescseq.arg[0], 1);
2162 tscrolldown(term.top, csiescseq.arg[0]);
2163 break;
2164 case 'L': /* IL -- Insert <n> blank lines */
2165 DEFAULT(csiescseq.arg[0], 1);
2166 tinsertblankline(csiescseq.arg[0]);
2167 break;
2168 case 'l': /* RM -- Reset Mode */
2169 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
2170 break;
2171 case 'M': /* DL -- Delete <n> lines */
2172 DEFAULT(csiescseq.arg[0], 1);
2173 tdeleteline(csiescseq.arg[0]);
2174 break;
2175 case 'X': /* ECH -- Erase <n> char */
2176 DEFAULT(csiescseq.arg[0], 1);
2177 tclearregion(term.c.x, term.c.y,
2178 term.c.x + csiescseq.arg[0] - 1, term.c.y);
2179 break;
2180 case 'P': /* DCH -- Delete <n> char */
2181 DEFAULT(csiescseq.arg[0], 1);
2182 tdeletechar(csiescseq.arg[0]);
2183 break;
2184 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
2185 DEFAULT(csiescseq.arg[0], 1);
2186 tputtab(-csiescseq.arg[0]);
2187 break;
2188 case 'd': /* VPA -- Move to <row> */
2189 DEFAULT(csiescseq.arg[0], 1);
2190 tmoveato(term.c.x, csiescseq.arg[0]-1);
2191 break;
2192 case 'h': /* SM -- Set terminal mode */
2193 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
2194 break;
2195 case 'm': /* SGR -- Terminal attribute (color) */
2196 tsetattr(csiescseq.arg, csiescseq.narg);
2197 break;
2198 case 'n': /* DSR – Device Status Report (cursor position) */
2199 if (csiescseq.arg[0] == 6) {
2200 len = snprintf(buf, sizeof(buf),"\033[%i;%iR",
2201 term.c.y+1, term.c.x+1);
2202 ttywrite(buf, len);
2203 }
2204 break;
2205 case 'r': /* DECSTBM -- Set Scrolling Region */
2206 if(csiescseq.priv) {
2207 goto unknown;
2208 } else {
2209 DEFAULT(csiescseq.arg[0], 1);
2210 DEFAULT(csiescseq.arg[1], term.row);
2211 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
2212 tmoveato(0, 0);
2213 }
2214 break;
2215 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
2216 tcursor(CURSOR_SAVE);
2217 break;
2218 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
2219 tcursor(CURSOR_LOAD);
2220 break;
2221 case ' ':
2222 switch (csiescseq.mode[1]) {
2223 case 'q': /* DECSCUSR -- Set Cursor Style */
2224 DEFAULT(csiescseq.arg[0], 1);
2225 if (!BETWEEN(csiescseq.arg[0], 0, 6)) {
2226 goto unknown;
2227 }
2228 xw.cursor = csiescseq.arg[0];
2229 break;
2230 default:
2231 goto unknown;
2232 }
2233 break;
2234 }
2235 }
2236
2237 void
2238 csidump(void) {
2239 int i;
2240 uint c;
2241
2242 printf("ESC[");
2243 for(i = 0; i < csiescseq.len; i++) {
2244 c = csiescseq.buf[i] & 0xff;
2245 if(isprint(c)) {
2246 putchar(c);
2247 } else if(c == '\n') {
2248 printf("(\\n)");
2249 } else if(c == '\r') {
2250 printf("(\\r)");
2251 } else if(c == 0x1b) {
2252 printf("(\\e)");
2253 } else {
2254 printf("(%02x)", c);
2255 }
2256 }
2257 putchar('\n');
2258 }
2259
2260 void
2261 csireset(void) {
2262 memset(&csiescseq, 0, sizeof(csiescseq));
2263 }
2264
2265 void
2266 strhandle(void) {
2267 char *p = NULL;
2268 int j, narg, par;
2269
2270 term.esc &= ~(ESC_STR_END|ESC_STR);
2271 strparse();
2272 par = (narg = strescseq.narg) ? atoi(strescseq.args[0]) : 0;
2273
2274 switch(strescseq.type) {
2275 case ']': /* OSC -- Operating System Command */
2276 switch(par) {
2277 case 0:
2278 case 1:
2279 case 2:
2280 if(narg > 1)
2281 xsettitle(strescseq.args[1]);
2282 return;
2283 case 4: /* color set */
2284 if(narg < 3)
2285 break;
2286 p = strescseq.args[2];
2287 /* FALLTHROUGH */
2288 case 104: /* color reset, here p = NULL */
2289 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2290 if(xsetcolorname(j, p)) {
2291 fprintf(stderr, "erresc: invalid color %s\n", p);
2292 } else {
2293 /*
2294 * TODO if defaultbg color is changed, borders
2295 * are dirty
2296 */
2297 redraw();
2298 }
2299 return;
2300 }
2301 break;
2302 case 'k': /* old title set compatibility */
2303 xsettitle(strescseq.args[0]);
2304 return;
2305 case 'P': /* DCS -- Device Control String */
2306 case '_': /* APC -- Application Program Command */
2307 case '^': /* PM -- Privacy Message */
2308 return;
2309 }
2310
2311 fprintf(stderr, "erresc: unknown str ");
2312 strdump();
2313 }
2314
2315 void
2316 strparse(void) {
2317 int c;
2318 char *p = strescseq.buf;
2319
2320 strescseq.narg = 0;
2321 strescseq.buf[strescseq.len] = '\0';
2322
2323 if(*p == '\0')
2324 return;
2325
2326 while(strescseq.narg < STR_ARG_SIZ) {
2327 strescseq.args[strescseq.narg++] = p;
2328 while((c = *p) != ';' && c != '\0')
2329 ++p;
2330 if(c == '\0')
2331 return;
2332 *p++ = '\0';
2333 }
2334 }
2335
2336 void
2337 strdump(void) {
2338 int i;
2339 uint c;
2340
2341 printf("ESC%c", strescseq.type);
2342 for(i = 0; i < strescseq.len; i++) {
2343 c = strescseq.buf[i] & 0xff;
2344 if(c == '\0') {
2345 return;
2346 } else if(isprint(c)) {
2347 putchar(c);
2348 } else if(c == '\n') {
2349 printf("(\\n)");
2350 } else if(c == '\r') {
2351 printf("(\\r)");
2352 } else if(c == 0x1b) {
2353 printf("(\\e)");
2354 } else {
2355 printf("(%02x)", c);
2356 }
2357 }
2358 printf("ESC\\\n");
2359 }
2360
2361 void
2362 strreset(void) {
2363 memset(&strescseq, 0, sizeof(strescseq));
2364 }
2365
2366 void
2367 tprinter(char *s, size_t len) {
2368 if(iofd != -1 && xwrite(iofd, s, len) < 0) {
2369 fprintf(stderr, "Error writing in %s:%s\n",
2370 opt_io, strerror(errno));
2371 close(iofd);
2372 iofd = -1;
2373 }
2374 }
2375
2376 void
2377 toggleprinter(const Arg *arg) {
2378 term.mode ^= MODE_PRINT;
2379 }
2380
2381 void
2382 printscreen(const Arg *arg) {
2383 tdump();
2384 }
2385
2386 void
2387 printsel(const Arg *arg) {
2388 tdumpsel();
2389 }
2390
2391 void
2392 tdumpsel(void) {
2393 char *ptr;
2394
2395 if((ptr = getsel())) {
2396 tprinter(ptr, strlen(ptr));
2397 free(ptr);
2398 }
2399 }
2400
2401 void
2402 tdumpline(int n) {
2403 char buf[UTF_SIZ];
2404 Glyph *bp, *end;
2405
2406 bp = &term.line[n][0];
2407 end = &bp[MIN(tlinelen(n), term.col) - 1];
2408 if(bp != end || bp->u != ' ') {
2409 for( ;bp <= end; ++bp)
2410 tprinter(buf, utf8encode(bp->u, buf));
2411 }
2412 tprinter("\n", 1);
2413 }
2414
2415 void
2416 tdump(void) {
2417 int i;
2418
2419 for(i = 0; i < term.row; ++i)
2420 tdumpline(i);
2421 }
2422
2423 void
2424 tputtab(int n) {
2425 uint x = term.c.x;
2426
2427 if(n > 0) {
2428 while(x < term.col && n--)
2429 for(++x; x < term.col && !term.tabs[x]; ++x)
2430 /* nothing */ ;
2431 } else if(n < 0) {
2432 while(x > 0 && n++)
2433 for(--x; x > 0 && !term.tabs[x]; --x)
2434 /* nothing */ ;
2435 }
2436 term.c.x = LIMIT(x, 0, term.col-1);
2437 }
2438
2439 void
2440 techo(long u) {
2441 if(ISCONTROL(u)) { /* control code */
2442 if(u & 0x80) {
2443 u &= 0x7f;
2444 tputc('^');
2445 tputc('[');
2446 } else if(u != '\n' && u != '\r' && u != '\t') {
2447 u ^= 0x40;
2448 tputc('^');
2449 }
2450 }
2451 tputc(u);
2452 }
2453
2454 void
2455 tdeftran(char ascii) {
2456 static char cs[] = "0B";
2457 static int vcs[] = {CS_GRAPHIC0, CS_USA};
2458 char *p;
2459
2460 if((p = strchr(cs, ascii)) == NULL) {
2461 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2462 } else {
2463 term.trantbl[term.icharset] = vcs[p - cs];
2464 }
2465 }
2466
2467 void
2468 tdectest(char c) {
2469 int x, y;
2470
2471 if(c == '8') { /* DEC screen alignment test. */
2472 for(x = 0; x < term.col; ++x) {
2473 for(y = 0; y < term.row; ++y)
2474 tsetchar('E', &term.c.attr, x, y);
2475 }
2476 }
2477 }
2478
2479 void
2480 tstrsequence(uchar c) {
2481 switch (c) {
2482 case 0x90: /* DCS -- Device Control String */
2483 c = 'P';
2484 break;
2485 case 0x9f: /* APC -- Application Program Command */
2486 c = '_';
2487 break;
2488 case 0x9e: /* PM -- Privacy Message */
2489 c = '^';
2490 break;
2491 case 0x9d: /* OSC -- Operating System Command */
2492 c = ']';
2493 break;
2494 }
2495 strreset();
2496 strescseq.type = c;
2497 term.esc |= ESC_STR;
2498 }
2499
2500 void
2501 tcontrolcode(uchar ascii) {
2502 switch(ascii) {
2503 case '\t': /* HT */
2504 tputtab(1);
2505 return;
2506 case '\b': /* BS */
2507 tmoveto(term.c.x-1, term.c.y);
2508 return;
2509 case '\r': /* CR */
2510 tmoveto(0, term.c.y);
2511 return;
2512 case '\f': /* LF */
2513 case '\v': /* VT */
2514 case '\n': /* LF */
2515 /* go to first col if the mode is set */
2516 tnewline(IS_SET(MODE_CRLF));
2517 return;
2518 case '\a': /* BEL */
2519 if(term.esc & ESC_STR_END) {
2520 /* backwards compatibility to xterm */
2521 strhandle();
2522 } else {
2523 if(!(xw.state & WIN_FOCUSED))
2524 xseturgency(1);
2525 if (bellvolume)
2526 XkbBell(xw.dpy, xw.win, bellvolume, (Atom)NULL);
2527 }
2528 break;
2529 case '\033': /* ESC */
2530 csireset();
2531 term.esc &= ~(ESC_CSI|ESC_ALTCHARSET|ESC_TEST);
2532 term.esc |= ESC_START;
2533 return;
2534 case '\016': /* SO (LS1 -- Locking shift 1) */
2535 case '\017': /* SI (LS0 -- Locking shift 0) */
2536 term.charset = 1 - (ascii - '\016');
2537 return;
2538 case '\032': /* SUB */
2539 tsetchar('?', &term.c.attr, term.c.x, term.c.y);
2540 case '\030': /* CAN */
2541 csireset();
2542 break;
2543 case '\005': /* ENQ (IGNORED) */
2544 case '\000': /* NUL (IGNORED) */
2545 case '\021': /* XON (IGNORED) */
2546 case '\023': /* XOFF (IGNORED) */
2547 case 0177: /* DEL (IGNORED) */
2548 return;
2549 case 0x84: /* TODO: IND */
2550 break;
2551 case 0x85: /* NEL -- Next line */
2552 tnewline(1); /* always go to first col */
2553 break;
2554 case 0x88: /* HTS -- Horizontal tab stop */
2555 term.tabs[term.c.x] = 1;
2556 break;
2557 case 0x8d: /* TODO: RI */
2558 case 0x8e: /* TODO: SS2 */
2559 case 0x8f: /* TODO: SS3 */
2560 case 0x98: /* TODO: SOS */
2561 break;
2562 case 0x9a: /* DECID -- Identify Terminal */
2563 ttywrite(vtiden, sizeof(vtiden) - 1);
2564 break;
2565 case 0x9b: /* TODO: CSI */
2566 case 0x9c: /* TODO: ST */
2567 break;
2568 case 0x90: /* DCS -- Device Control String */
2569 case 0x9f: /* APC -- Application Program Command */
2570 case 0x9e: /* PM -- Privacy Message */
2571 case 0x9d: /* OSC -- Operating System Command */
2572 tstrsequence(ascii);
2573 return;
2574 }
2575 /* only CAN, SUB, \a and C1 chars interrupt a sequence */
2576 term.esc &= ~(ESC_STR_END|ESC_STR);
2577 }
2578
2579 /*
2580 * returns 1 when the sequence is finished and it hasn't to read
2581 * more characters for this sequence, otherwise 0
2582 */
2583 int
2584 eschandle(uchar ascii) {
2585 switch(ascii) {
2586 case '[':
2587 term.esc |= ESC_CSI;
2588 return 0;
2589 case '#':
2590 term.esc |= ESC_TEST;
2591 return 0;
2592 case 'P': /* DCS -- Device Control String */
2593 case '_': /* APC -- Application Program Command */
2594 case '^': /* PM -- Privacy Message */
2595 case ']': /* OSC -- Operating System Command */
2596 case 'k': /* old title set compatibility */
2597 tstrsequence(ascii);
2598 return 0;
2599 case 'n': /* LS2 -- Locking shift 2 */
2600 case 'o': /* LS3 -- Locking shift 3 */
2601 term.charset = 2 + (ascii - 'n');
2602 break;
2603 case '(': /* GZD4 -- set primary charset G0 */
2604 case ')': /* G1D4 -- set secondary charset G1 */
2605 case '*': /* G2D4 -- set tertiary charset G2 */
2606 case '+': /* G3D4 -- set quaternary charset G3 */
2607 term.icharset = ascii - '(';
2608 term.esc |= ESC_ALTCHARSET;
2609 return 0;
2610 case 'D': /* IND -- Linefeed */
2611 if(term.c.y == term.bot) {
2612 tscrollup(term.top, 1);
2613 } else {
2614 tmoveto(term.c.x, term.c.y+1);
2615 }
2616 break;
2617 case 'E': /* NEL -- Next line */
2618 tnewline(1); /* always go to first col */
2619 break;
2620 case 'H': /* HTS -- Horizontal tab stop */
2621 term.tabs[term.c.x] = 1;
2622 break;
2623 case 'M': /* RI -- Reverse index */
2624 if(term.c.y == term.top) {
2625 tscrolldown(term.top, 1);
2626 } else {
2627 tmoveto(term.c.x, term.c.y-1);
2628 }
2629 break;
2630 case 'Z': /* DECID -- Identify Terminal */
2631 ttywrite(vtiden, sizeof(vtiden) - 1);
2632 break;
2633 case 'c': /* RIS -- Reset to inital state */
2634 treset();
2635 xresettitle();
2636 xloadcols();
2637 break;
2638 case '=': /* DECPAM -- Application keypad */
2639 term.mode |= MODE_APPKEYPAD;
2640 break;
2641 case '>': /* DECPNM -- Normal keypad */
2642 term.mode &= ~MODE_APPKEYPAD;
2643 break;
2644 case '7': /* DECSC -- Save Cursor */
2645 tcursor(CURSOR_SAVE);
2646 break;
2647 case '8': /* DECRC -- Restore Cursor */
2648 tcursor(CURSOR_LOAD);
2649 break;
2650 case '\\': /* ST -- String Terminator */
2651 if(term.esc & ESC_STR_END)
2652 strhandle();
2653 break;
2654 default:
2655 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2656 (uchar) ascii, isprint(ascii)? ascii:'.');
2657 break;
2658 }
2659 return 1;
2660 }
2661
2662 void
2663 tputc(long u) {
2664 char c[UTF_SIZ];
2665 bool control;
2666 int width, len;
2667 Glyph *gp;
2668
2669 len = utf8encode(u, c);
2670 if((width = wcwidth(u)) == -1) {
2671 memcpy(c, "\357\277\275", 4); /* UTF_INVALID */
2672 width = 1;
2673 }
2674
2675 if(IS_SET(MODE_PRINT))
2676 tprinter(c, len);
2677 control = ISCONTROL(u);
2678
2679 /*
2680 * STR sequence must be checked before anything else
2681 * because it uses all following characters until it
2682 * receives a ESC, a SUB, a ST or any other C1 control
2683 * character.
2684 */
2685 if(term.esc & ESC_STR) {
2686 if(u == '\a' || u == 030 || u == 032 || u == 033 ||
2687 ISCONTROLC1(u)) {
2688 term.esc &= ~(ESC_START|ESC_STR);
2689 term.esc |= ESC_STR_END;
2690 } else if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2691 memmove(&strescseq.buf[strescseq.len], c, len);
2692 strescseq.len += len;
2693 return;
2694 } else {
2695 /*
2696 * Here is a bug in terminals. If the user never sends
2697 * some code to stop the str or esc command, then st
2698 * will stop responding. But this is better than
2699 * silently failing with unknown characters. At least
2700 * then users will report back.
2701 *
2702 * In the case users ever get fixed, here is the code:
2703 */
2704 /*
2705 * term.esc = 0;
2706 * strhandle();
2707 */
2708 return;
2709 }
2710 }
2711
2712 /*
2713 * Actions of control codes must be performed as soon they arrive
2714 * because they can be embedded inside a control sequence, and
2715 * they must not cause conflicts with sequences.
2716 */
2717 if(control) {
2718 tcontrolcode(u);
2719 /*
2720 * control codes are not shown ever
2721 */
2722 return;
2723 } else if(term.esc & ESC_START) {
2724 if(term.esc & ESC_CSI) {
2725 csiescseq.buf[csiescseq.len++] = u;
2726 if(BETWEEN(u, 0x40, 0x7E)
2727 || csiescseq.len >= \
2728 sizeof(csiescseq.buf)-1) {
2729 term.esc = 0;
2730 csiparse();
2731 csihandle();
2732 }
2733 return;
2734 } else if(term.esc & ESC_ALTCHARSET) {
2735 tdeftran(u);
2736 } else if(term.esc & ESC_TEST) {
2737 tdectest(u);
2738 } else {
2739 if (!eschandle(u))
2740 return;
2741 /* sequence already finished */
2742 }
2743 term.esc = 0;
2744 /*
2745 * All characters which form part of a sequence are not
2746 * printed
2747 */
2748 return;
2749 }
2750 if(sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
2751 selclear(NULL);
2752
2753 gp = &term.line[term.c.y][term.c.x];
2754 if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2755 gp->mode |= ATTR_WRAP;
2756 tnewline(1);
2757 gp = &term.line[term.c.y][term.c.x];
2758 }
2759
2760 if(IS_SET(MODE_INSERT) && term.c.x+width < term.col)
2761 memmove(gp+width, gp, (term.col - term.c.x - width) * sizeof(Glyph));
2762
2763 if(term.c.x+width > term.col) {
2764 tnewline(1);
2765 gp = &term.line[term.c.y][term.c.x];
2766 }
2767
2768 tsetchar(u, &term.c.attr, term.c.x, term.c.y);
2769
2770 if(width == 2) {
2771 gp->mode |= ATTR_WIDE;
2772 if(term.c.x+1 < term.col) {
2773 gp[1].u = '\0';
2774 gp[1].mode = ATTR_WDUMMY;
2775 }
2776 }
2777 if(term.c.x+width < term.col) {
2778 tmoveto(term.c.x+width, term.c.y);
2779 } else {
2780 term.c.state |= CURSOR_WRAPNEXT;
2781 }
2782 }
2783
2784 void
2785 tresize(int col, int row) {
2786 int i;
2787 int minrow = MIN(row, term.row);
2788 int mincol = MIN(col, term.col);
2789 bool *bp;
2790 TCursor c;
2791
2792 if(col < 1 || row < 1) {
2793 fprintf(stderr,
2794 "tresize: error resizing to %dx%d\n", col, row);
2795 return;
2796 }
2797
2798 /*
2799 * slide screen to keep cursor where we expect it -
2800 * tscrollup would work here, but we can optimize to
2801 * memmove because we're freeing the earlier lines
2802 */
2803 for(i = 0; i <= term.c.y - row; i++) {
2804 free(term.line[i]);
2805 free(term.alt[i]);
2806 }
2807 /* ensure that both src and dst are not NULL */
2808 if (i > 0) {
2809 memmove(term.line, term.line + i, row * sizeof(Line));
2810 memmove(term.alt, term.alt + i, row * sizeof(Line));
2811 }
2812 for(i += row; i < term.row; i++) {
2813 free(term.line[i]);
2814 free(term.alt[i]);
2815 }
2816
2817 /* resize to new height */
2818 term.line = xrealloc(term.line, row * sizeof(Line));
2819 term.alt = xrealloc(term.alt, row * sizeof(Line));
2820 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2821 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2822
2823 /* resize each row to new width, zero-pad if needed */
2824 for(i = 0; i < minrow; i++) {
2825 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2826 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2827 }
2828
2829 /* allocate any new rows */
2830 for(/* i == minrow */; i < row; i++) {
2831 term.line[i] = xmalloc(col * sizeof(Glyph));
2832 term.alt[i] = xmalloc(col * sizeof(Glyph));
2833 }
2834 if(col > term.col) {
2835 bp = term.tabs + term.col;
2836
2837 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2838 while(--bp > term.tabs && !*bp)
2839 /* nothing */ ;
2840 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2841 *bp = 1;
2842 }
2843 /* update terminal size */
2844 term.col = col;
2845 term.row = row;
2846 /* reset scrolling region */
2847 tsetscroll(0, row-1);
2848 /* make use of the LIMIT in tmoveto */
2849 tmoveto(term.c.x, term.c.y);
2850 /* Clearing both screens (it makes dirty all lines) */
2851 c = term.c;
2852 for(i = 0; i < 2; i++) {
2853 if(mincol < col && 0 < minrow) {
2854 tclearregion(mincol, 0, col - 1, minrow - 1);
2855 }
2856 if(0 < col && minrow < row) {
2857 tclearregion(0, minrow, col - 1, row - 1);
2858 }
2859 tswapscreen();
2860 tcursor(CURSOR_LOAD);
2861 }
2862 term.c = c;
2863 }
2864
2865 void
2866 xresize(int col, int row) {
2867 xw.tw = MAX(1, col * xw.cw);
2868 xw.th = MAX(1, row * xw.ch);
2869
2870 XFreePixmap(xw.dpy, xw.buf);
2871 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2872 DefaultDepth(xw.dpy, xw.scr));
2873 XftDrawChange(xw.draw, xw.buf);
2874 xclear(0, 0, xw.w, xw.h);
2875 }
2876
2877 ushort
2878 sixd_to_16bit(int x) {
2879 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2880 }
2881
2882 bool
2883 xloadcolor(int i, const char *name, Color *ncolor) {
2884 XRenderColor color = { .alpha = 0xffff };
2885
2886 if(!name) {
2887 if(BETWEEN(i, 16, 255)) { /* 256 color */
2888 if(i < 6*6*6+16) { /* same colors as xterm */
2889 color.red = sixd_to_16bit( ((i-16)/36)%6 );
2890 color.green = sixd_to_16bit( ((i-16)/6) %6 );
2891 color.blue = sixd_to_16bit( ((i-16)/1) %6 );
2892 } else { /* greyscale */
2893 color.red = 0x0808 + 0x0a0a * (i - (6*6*6+16));
2894 color.green = color.blue = color.red;
2895 }
2896 return XftColorAllocValue(xw.dpy, xw.vis,
2897 xw.cmap, &color, ncolor);
2898 } else
2899 name = colorname[i];
2900 }
2901 return XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, ncolor);
2902 }
2903
2904 void
2905 xloadcols(void) {
2906 int i;
2907 static bool loaded;
2908 Color *cp;
2909
2910 if(loaded) {
2911 for (cp = dc.col; cp < &dc.col[LEN(dc.col)]; ++cp)
2912 XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
2913 }
2914
2915 for(i = 0; i < LEN(dc.col); i++)
2916 if(!xloadcolor(i, NULL, &dc.col[i])) {
2917 if(colorname[i])
2918 die("Could not allocate color '%s'\n", colorname[i]);
2919 else
2920 die("Could not allocate color %d\n", i);
2921 }
2922 loaded = true;
2923 }
2924
2925 int
2926 xsetcolorname(int x, const char *name) {
2927 Color ncolor;
2928
2929 if(!BETWEEN(x, 0, LEN(dc.col)))
2930 return 1;
2931
2932
2933 if(!xloadcolor(x, name, &ncolor))
2934 return 1;
2935
2936 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2937 dc.col[x] = ncolor;
2938 return 0;
2939 }
2940
2941 void
2942 xtermclear(int col1, int row1, int col2, int row2) {
2943 XftDrawRect(xw.draw,
2944 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2945 borderpx + col1 * xw.cw,
2946 borderpx + row1 * xw.ch,
2947 (col2-col1+1) * xw.cw,
2948 (row2-row1+1) * xw.ch);
2949 }
2950
2951 /*
2952 * Absolute coordinates.
2953 */
2954 void
2955 xclear(int x1, int y1, int x2, int y2) {
2956 XftDrawRect(xw.draw,
2957 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2958 x1, y1, x2-x1, y2-y1);
2959 }
2960
2961 void
2962 xhints(void) {
2963 XClassHint class = {opt_class ? opt_class : termname, termname};
2964 XWMHints wm = {.flags = InputHint, .input = 1};
2965 XSizeHints *sizeh = NULL;
2966
2967 sizeh = XAllocSizeHints();
2968
2969 sizeh->flags = PSize | PResizeInc | PBaseSize;
2970 sizeh->height = xw.h;
2971 sizeh->width = xw.w;
2972 sizeh->height_inc = xw.ch;
2973 sizeh->width_inc = xw.cw;
2974 sizeh->base_height = 2 * borderpx;
2975 sizeh->base_width = 2 * borderpx;
2976 if(xw.isfixed == True) {
2977 sizeh->flags |= PMaxSize | PMinSize;
2978 sizeh->min_width = sizeh->max_width = xw.w;
2979 sizeh->min_height = sizeh->max_height = xw.h;
2980 }
2981 if(xw.gm & (XValue|YValue)) {
2982 sizeh->flags |= USPosition | PWinGravity;
2983 sizeh->x = xw.l;
2984 sizeh->y = xw.t;
2985 sizeh->win_gravity = xgeommasktogravity(xw.gm);
2986 }
2987
2988 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
2989 &class);
2990 XFree(sizeh);
2991 }
2992
2993 int
2994 xgeommasktogravity(int mask) {
2995 switch(mask & (XNegative|YNegative)) {
2996 case 0:
2997 return NorthWestGravity;
2998 case XNegative:
2999 return NorthEastGravity;
3000 case YNegative:
3001 return SouthWestGravity;
3002 }
3003 return SouthEastGravity;
3004 }
3005
3006 int
3007 xloadfont(Font *f, FcPattern *pattern) {
3008 FcPattern *match;
3009 FcResult result;
3010
3011 match = FcFontMatch(NULL, pattern, &result);
3012 if(!match)
3013 return 1;
3014
3015 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
3016 FcPatternDestroy(match);
3017 return 1;
3018 }
3019
3020 f->set = NULL;
3021 f->pattern = FcPatternDuplicate(pattern);
3022
3023 f->ascent = f->match->ascent;
3024 f->descent = f->match->descent;
3025 f->lbearing = 0;
3026 f->rbearing = f->match->max_advance_width;
3027
3028 f->height = f->ascent + f->descent;
3029 f->width = f->lbearing + f->rbearing;
3030
3031 return 0;
3032 }
3033
3034 void
3035 xloadfonts(char *fontstr, double fontsize) {
3036 FcPattern *pattern;
3037 FcResult r_sz, r_psz;
3038 double fontval;
3039 float ceilf(float);
3040
3041 if(fontstr[0] == '-') {
3042 pattern = XftXlfdParse(fontstr, False, False);
3043 } else {
3044 pattern = FcNameParse((FcChar8 *)fontstr);
3045 }
3046
3047 if(!pattern)
3048 die("st: can't open font %s\n", fontstr);
3049
3050 if(fontsize > 1) {
3051 FcPatternDel(pattern, FC_PIXEL_SIZE);
3052 FcPatternDel(pattern, FC_SIZE);
3053 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
3054 usedfontsize = fontsize;
3055 } else {
3056 r_psz = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
3057 r_sz = FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval);
3058 if(r_psz == FcResultMatch) {
3059 usedfontsize = fontval;
3060 } else if(r_sz == FcResultMatch) {
3061 usedfontsize = -1;
3062 } else {
3063 /*
3064 * Default font size is 12, if none given. This is to
3065 * have a known usedfontsize value.
3066 */
3067 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
3068 usedfontsize = 12;
3069 }
3070 defaultfontsize = usedfontsize;
3071 }
3072
3073 FcConfigSubstitute(0, pattern, FcMatchPattern);
3074 FcDefaultSubstitute(pattern);
3075
3076 if(xloadfont(&dc.font, pattern))
3077 die("st: can't open font %s\n", fontstr);
3078
3079 if(usedfontsize < 0) {
3080 FcPatternGetDouble(dc.font.match->pattern,
3081 FC_PIXEL_SIZE, 0, &fontval);
3082 usedfontsize = fontval;
3083 if(fontsize == 0)
3084 defaultfontsize = fontval;
3085 }
3086
3087 /* Setting character width and height. */
3088 xw.cw = ceilf(dc.font.width * cwscale);
3089 xw.ch = ceilf(dc.font.height * chscale);
3090
3091 FcPatternDel(pattern, FC_SLANT);
3092 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
3093 if(xloadfont(&dc.ifont, pattern))
3094 die("st: can't open font %s\n", fontstr);
3095
3096 FcPatternDel(pattern, FC_WEIGHT);
3097 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
3098 if(xloadfont(&dc.ibfont, pattern))
3099 die("st: can't open font %s\n", fontstr);
3100
3101 FcPatternDel(pattern, FC_SLANT);
3102 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
3103 if(xloadfont(&dc.bfont, pattern))
3104 die("st: can't open font %s\n", fontstr);
3105
3106 FcPatternDestroy(pattern);
3107 }
3108
3109 void
3110 xunloadfont(Font *f) {
3111 XftFontClose(xw.dpy, f->match);
3112 FcPatternDestroy(f->pattern);
3113 if(f->set)
3114 FcFontSetDestroy(f->set);
3115 }
3116
3117 void
3118 xunloadfonts(void) {
3119 /* Free the loaded fonts in the font cache. */
3120 while(frclen > 0)
3121 XftFontClose(xw.dpy, frc[--frclen].font);
3122
3123 xunloadfont(&dc.font);
3124 xunloadfont(&dc.bfont);
3125 xunloadfont(&dc.ifont);
3126 xunloadfont(&dc.ibfont);
3127 }
3128
3129 void
3130 xzoom(const Arg *arg) {
3131 Arg larg;
3132
3133 larg.i = usedfontsize + arg->i;
3134 xzoomabs(&larg);
3135 }
3136
3137 void
3138 xzoomabs(const Arg *arg) {
3139 xunloadfonts();
3140 xloadfonts(usedfont, arg->i);
3141 cresize(0, 0);
3142 redraw();
3143 xhints();
3144 }
3145
3146 void
3147 xzoomreset(const Arg *arg) {
3148 Arg larg;
3149
3150 if(defaultfontsize > 0) {
3151 larg.i = defaultfontsize;
3152 xzoomabs(&larg);
3153 }
3154 }
3155
3156 void
3157 xinit(void) {
3158 XGCValues gcvalues;
3159 Cursor cursor;
3160 Window parent;
3161 pid_t thispid = getpid();
3162
3163 if(!(xw.dpy = XOpenDisplay(NULL)))
3164 die("Can't open display\n");
3165 xw.scr = XDefaultScreen(xw.dpy);
3166 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
3167
3168 /* font */
3169 if(!FcInit())
3170 die("Could not init fontconfig.\n");
3171
3172 usedfont = (opt_font == NULL)? font : opt_font;
3173 xloadfonts(usedfont, 0);
3174
3175 /* colors */
3176 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
3177 xloadcols();
3178
3179 /* adjust fixed window geometry */
3180 xw.w = 2 * borderpx + term.col * xw.cw;
3181 xw.h = 2 * borderpx + term.row * xw.ch;
3182 if(xw.gm & XNegative)
3183 xw.l += DisplayWidth(xw.dpy, xw.scr) - xw.w - 2;
3184 if(xw.gm & YNegative)
3185 xw.t += DisplayWidth(xw.dpy, xw.scr) - xw.h - 2;
3186
3187 /* Events */
3188 xw.attrs.background_pixel = dc.col[defaultbg].pixel;
3189 xw.attrs.border_pixel = dc.col[defaultbg].pixel;
3190 xw.attrs.bit_gravity = NorthWestGravity;
3191 xw.attrs.event_mask = FocusChangeMask | KeyPressMask
3192 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
3193 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
3194 xw.attrs.colormap = xw.cmap;
3195
3196 if (!(opt_embed && (parent = strtol(opt_embed, NULL, 0))))
3197 parent = XRootWindow(xw.dpy, xw.scr);
3198 xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
3199 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
3200 xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
3201 | CWEventMask | CWColormap, &xw.attrs);
3202
3203 memset(&gcvalues, 0, sizeof(gcvalues));
3204 gcvalues.graphics_exposures = False;
3205 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
3206 &gcvalues);
3207 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
3208 DefaultDepth(xw.dpy, xw.scr));
3209 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
3210 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
3211
3212 /* Xft rendering context */
3213 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
3214
3215 /* input methods */
3216 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3217 XSetLocaleModifiers("@im=local");
3218 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3219 XSetLocaleModifiers("@im=");
3220 if((xw.xim = XOpenIM(xw.dpy,
3221 NULL, NULL, NULL)) == NULL) {
3222 die("XOpenIM failed. Could not open input"
3223 " device.\n");
3224 }
3225 }
3226 }
3227 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
3228 | XIMStatusNothing, XNClientWindow, xw.win,
3229 XNFocusWindow, xw.win, NULL);
3230 if(xw.xic == NULL)
3231 die("XCreateIC failed. Could not obtain input method.\n");
3232
3233 /* white cursor, black outline */
3234 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
3235 XDefineCursor(xw.dpy, xw.win, cursor);
3236 XRecolorCursor(xw.dpy, cursor,
3237 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
3238 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
3239
3240 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
3241 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
3242 xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
3243 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
3244
3245 xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
3246 XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
3247 PropModeReplace, (uchar *)&thispid, 1);
3248
3249 xresettitle();
3250 XMapWindow(xw.dpy, xw.win);
3251 xhints();
3252 XSync(xw.dpy, False);
3253 }
3254
3255 void
3256 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
3257 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
3258 width = charlen * xw.cw, xp, i;
3259 int frcflags, charexists;
3260 int u8fl, u8fblen, u8cblen, doesexist;
3261 char *u8c, *u8fs;
3262 long unicodep;
3263 Font *font = &dc.font;
3264 FcResult fcres;
3265 FcPattern *fcpattern, *fontpattern;
3266 FcFontSet *fcsets[] = { NULL };
3267 FcCharSet *fccharset;
3268 Color *fg, *bg, *temp, revfg, revbg, truefg, truebg;
3269 XRenderColor colfg, colbg;
3270 XRectangle r;
3271 int oneatatime;
3272
3273 frcflags = FRC_NORMAL;
3274
3275 if(base.mode & ATTR_ITALIC) {
3276 if(base.fg == defaultfg)
3277 base.fg = defaultitalic;
3278 font = &dc.ifont;
3279 frcflags = FRC_ITALIC;
3280 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
3281 if(base.fg == defaultfg)
3282 base.fg = defaultitalic;
3283 font = &dc.ibfont;
3284 frcflags = FRC_ITALICBOLD;
3285 } else if(base.mode & ATTR_UNDERLINE) {
3286 if(base.fg == defaultfg)
3287 base.fg = defaultunderline;
3288 }
3289
3290 if(IS_TRUECOL(base.fg)) {
3291 colfg.alpha = 0xffff;
3292 colfg.red = TRUERED(base.fg);
3293 colfg.green = TRUEGREEN(base.fg);
3294 colfg.blue = TRUEBLUE(base.fg);
3295 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
3296 fg = &truefg;
3297 } else {
3298 fg = &dc.col[base.fg];
3299 }
3300
3301 if(IS_TRUECOL(base.bg)) {
3302 colbg.alpha = 0xffff;
3303 colbg.green = TRUEGREEN(base.bg);
3304 colbg.red = TRUERED(base.bg);
3305 colbg.blue = TRUEBLUE(base.bg);
3306 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
3307 bg = &truebg;
3308 } else {
3309 bg = &dc.col[base.bg];
3310 }
3311
3312 if(base.mode & ATTR_BOLD) {
3313 /*
3314 * change basic system colors [0-7]
3315 * to bright system colors [8-15]
3316 */
3317 if(BETWEEN(base.fg, 0, 7) && !(base.mode & ATTR_FAINT))
3318 fg = &dc.col[base.fg + 8];
3319
3320 if(base.mode & ATTR_ITALIC) {
3321 font = &dc.ibfont;
3322 frcflags = FRC_ITALICBOLD;
3323 } else {
3324 font = &dc.bfont;
3325 frcflags = FRC_BOLD;
3326 }
3327 }
3328
3329 if(IS_SET(MODE_REVERSE)) {
3330 if(fg == &dc.col[defaultfg]) {
3331 fg = &dc.col[defaultbg];
3332 } else {
3333 colfg.red = ~fg->color.red;
3334 colfg.green = ~fg->color.green;
3335 colfg.blue = ~fg->color.blue;
3336 colfg.alpha = fg->color.alpha;
3337 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
3338 &revfg);
3339 fg = &revfg;
3340 }
3341
3342 if(bg == &dc.col[defaultbg]) {
3343 bg = &dc.col[defaultfg];
3344 } else {
3345 colbg.red = ~bg->color.red;
3346 colbg.green = ~bg->color.green;
3347 colbg.blue = ~bg->color.blue;
3348 colbg.alpha = bg->color.alpha;
3349 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
3350 &revbg);
3351 bg = &revbg;
3352 }
3353 }
3354
3355 if(base.mode & ATTR_REVERSE) {
3356 temp = fg;
3357 fg = bg;
3358 bg = temp;
3359 }
3360
3361 if(base.mode & ATTR_FAINT && !(base.mode & ATTR_BOLD)) {
3362 colfg.red = fg->color.red / 2;
3363 colfg.green = fg->color.green / 2;
3364 colfg.blue = fg->color.blue / 2;
3365 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
3366 fg = &revfg;
3367 }
3368
3369 if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
3370 fg = bg;
3371
3372 if(base.mode & ATTR_INVISIBLE)
3373 fg = bg;
3374
3375 /* Intelligent cleaning up of the borders. */
3376 if(x == 0) {
3377 xclear(0, (y == 0)? 0 : winy, borderpx,
3378 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
3379 }
3380 if(x + charlen >= term.col) {
3381 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
3382 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
3383 }
3384 if(y == 0)
3385 xclear(winx, 0, winx + width, borderpx);
3386 if(y == term.row-1)
3387 xclear(winx, winy + xw.ch, winx + width, xw.h);
3388
3389 /* Clean up the region we want to draw to. */
3390 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
3391
3392 /* Set the clip region because Xft is sometimes dirty. */
3393 r.x = 0;
3394 r.y = 0;
3395 r.height = xw.ch;
3396 r.width = width;
3397 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
3398
3399 for(xp = winx; bytelen > 0;) {
3400 /*
3401 * Search for the range in the to be printed string of glyphs
3402 * that are in the main font. Then print that range. If
3403 * some glyph is found that is not in the font, do the
3404 * fallback dance.
3405 */
3406 u8fs = s;
3407 u8fblen = 0;
3408 u8fl = 0;
3409 oneatatime = font->width != xw.cw;
3410 for(;;) {
3411 u8c = s;
3412 u8cblen = utf8decode(s, &unicodep, UTF_SIZ);
3413 s += u8cblen;
3414 bytelen -= u8cblen;
3415
3416 doesexist = XftCharExists(xw.dpy, font->match, unicodep);
3417 if(doesexist) {
3418 u8fl++;
3419 u8fblen += u8cblen;
3420 if(!oneatatime && bytelen > 0)
3421 continue;
3422 }
3423
3424 if(u8fl > 0) {
3425 XftDrawStringUtf8(xw.draw, fg,
3426 font->match, xp,
3427 winy + font->ascent,
3428 (FcChar8 *)u8fs,
3429 u8fblen);
3430 xp += xw.cw * u8fl;
3431 }
3432 break;
3433 }
3434 if(doesexist) {
3435 if(oneatatime)
3436 continue;
3437 break;
3438 }
3439
3440 /* Search the font cache. */
3441 for(i = 0; i < frclen; i++) {
3442 charexists = XftCharExists(xw.dpy, frc[i].font, unicodep);
3443 /* Everything correct. */
3444 if(charexists && frc[i].flags == frcflags)
3445 break;
3446 /* We got a default font for a not found glyph. */
3447 if(!charexists && frc[i].flags == frcflags \
3448 && frc[i].unicodep == unicodep) {
3449 break;
3450 }
3451 }
3452
3453 /* Nothing was found. */
3454 if(i >= frclen) {
3455 if(!font->set)
3456 font->set = FcFontSort(0, font->pattern,
3457 FcTrue, 0, &fcres);
3458 fcsets[0] = font->set;
3459
3460 /*
3461 * Nothing was found in the cache. Now use
3462 * some dozen of Fontconfig calls to get the
3463 * font for one single character.
3464 *
3465 * Xft and fontconfig are design failures.
3466 */
3467 fcpattern = FcPatternDuplicate(font->pattern);
3468 fccharset = FcCharSetCreate();
3469
3470 FcCharSetAddChar(fccharset, unicodep);
3471 FcPatternAddCharSet(fcpattern, FC_CHARSET,
3472 fccharset);
3473 FcPatternAddBool(fcpattern, FC_SCALABLE,
3474 FcTrue);
3475
3476 FcConfigSubstitute(0, fcpattern,
3477 FcMatchPattern);
3478 FcDefaultSubstitute(fcpattern);
3479
3480 fontpattern = FcFontSetMatch(0, fcsets, 1,
3481 fcpattern, &fcres);
3482
3483 /*
3484 * Overwrite or create the new cache entry.
3485 */
3486 if(frclen >= LEN(frc)) {
3487 frclen = LEN(frc) - 1;
3488 XftFontClose(xw.dpy, frc[frclen].font);
3489 frc[frclen].unicodep = 0;
3490 }
3491
3492 frc[frclen].font = XftFontOpenPattern(xw.dpy,
3493 fontpattern);
3494 frc[frclen].flags = frcflags;
3495 frc[frclen].unicodep = unicodep;
3496
3497 i = frclen;
3498 frclen++;
3499
3500 FcPatternDestroy(fcpattern);
3501 FcCharSetDestroy(fccharset);
3502 }
3503
3504 XftDrawStringUtf8(xw.draw, fg, frc[i].font,
3505 xp, winy + frc[i].font->ascent,
3506 (FcChar8 *)u8c, u8cblen);
3507
3508 xp += xw.cw * wcwidth(unicodep);
3509 }
3510
3511 /*
3512 * This is how the loop above actually should be. Why does the
3513 * application have to care about font details?
3514 *
3515 * I have to repeat: Xft and Fontconfig are design failures.
3516 */
3517 /*
3518 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
3519 winy + font->ascent, (FcChar8 *)s, bytelen);
3520 */
3521
3522 if(base.mode & ATTR_UNDERLINE) {
3523 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
3524 width, 1);
3525 }
3526
3527 if(base.mode & ATTR_STRUCK) {
3528 XftDrawRect(xw.draw, fg, winx, winy + 2 * font->ascent / 3,
3529 width, 1);
3530 }
3531
3532 /* Reset clip to none. */
3533 XftDrawSetClip(xw.draw, 0);
3534 }
3535
3536 void
3537 xdrawglyph(Glyph g, int x, int y) {
3538 static char buf[UTF_SIZ];
3539 size_t len = utf8encode(g.u, buf);
3540 int width = g.mode & ATTR_WIDE ? 2 : 1;
3541
3542 xdraws(buf, g, x, y, width, len);
3543 }
3544
3545 void
3546 xdrawcursor(void) {
3547 static int oldx = 0, oldy = 0;
3548 int curx;
3549 Glyph g = {' ', ATTR_NULL, defaultbg, defaultcs};
3550
3551 LIMIT(oldx, 0, term.col-1);
3552 LIMIT(oldy, 0, term.row-1);
3553
3554 curx = term.c.x;
3555
3556 /* adjust position if in dummy */
3557 if(term.line[oldy][oldx].mode & ATTR_WDUMMY)
3558 oldx--;
3559 if(term.line[term.c.y][curx].mode & ATTR_WDUMMY)
3560 curx--;
3561
3562 g.u = term.line[term.c.y][term.c.x].u;
3563
3564 /* remove the old cursor */
3565 xdrawglyph(term.line[oldy][oldx], oldx, oldy);
3566
3567 if(IS_SET(MODE_HIDE))
3568 return;
3569
3570 /* draw the new one */
3571 if(xw.state & WIN_FOCUSED) {
3572 switch (xw.cursor) {
3573 case 0: /* Blinking Block */
3574 case 1: /* Blinking Block (Default) */
3575 case 2: /* Steady Block */
3576 if(IS_SET(MODE_REVERSE)) {
3577 g.mode |= ATTR_REVERSE;
3578 g.fg = defaultcs;
3579 g.bg = defaultfg;
3580 }
3581
3582 g.mode |= term.line[term.c.y][curx].mode & ATTR_WIDE;
3583 xdrawglyph(g, term.c.x, term.c.y);
3584 break;
3585 case 3: /* Blinking Underline */
3586 case 4: /* Steady Underline */
3587 XftDrawRect(xw.draw, &dc.col[defaultcs],
3588 borderpx + curx * xw.cw,
3589 borderpx + (term.c.y + 1) * xw.ch - cursorthickness,
3590 xw.cw, cursorthickness);
3591 break;
3592 case 5: /* Blinking bar */
3593 case 6: /* Steady bar */
3594 XftDrawRect(xw.draw, &dc.col[defaultcs],
3595 borderpx + curx * xw.cw,
3596 borderpx + term.c.y * xw.ch,
3597 cursorthickness, xw.ch);
3598 break;
3599 }
3600 } else {
3601 XftDrawRect(xw.draw, &dc.col[defaultcs],
3602 borderpx + curx * xw.cw,
3603 borderpx + term.c.y * xw.ch,
3604 xw.cw - 1, 1);
3605 XftDrawRect(xw.draw, &dc.col[defaultcs],
3606 borderpx + curx * xw.cw,
3607 borderpx + term.c.y * xw.ch,
3608 1, xw.ch - 1);
3609 XftDrawRect(xw.draw, &dc.col[defaultcs],
3610 borderpx + (curx + 1) * xw.cw - 1,
3611 borderpx + term.c.y * xw.ch,
3612 1, xw.ch - 1);
3613 XftDrawRect(xw.draw, &dc.col[defaultcs],
3614 borderpx + curx * xw.cw,
3615 borderpx + (term.c.y + 1) * xw.ch - 1,
3616 xw.cw, 1);
3617 }
3618 oldx = curx, oldy = term.c.y;
3619 }
3620
3621
3622 void
3623 xsettitle(char *p) {
3624 XTextProperty prop;
3625
3626 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3627 &prop);
3628 XSetWMName(xw.dpy, xw.win, &prop);
3629 XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
3630 XFree(prop.value);
3631 }
3632
3633 void
3634 xresettitle(void) {
3635 xsettitle(opt_title ? opt_title : "st");
3636 }
3637
3638 void
3639 redraw(void) {
3640 tfulldirt();
3641 draw();
3642 }
3643
3644 void
3645 draw(void) {
3646 drawregion(0, 0, term.col, term.row);
3647 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3648 xw.h, 0, 0);
3649 XSetForeground(xw.dpy, dc.gc,
3650 dc.col[IS_SET(MODE_REVERSE)?
3651 defaultfg : defaultbg].pixel);
3652 }
3653
3654 void
3655 drawregion(int x1, int y1, int x2, int y2) {
3656 int ic, ib, x, y, ox;
3657 Glyph base, new;
3658 char buf[DRAW_BUF_SIZ];
3659 bool ena_sel = sel.ob.x != -1 && sel.alt == IS_SET(MODE_ALTSCREEN);
3660
3661 if(!(xw.state & WIN_VISIBLE))
3662 return;
3663
3664 for(y = y1; y < y2; y++) {
3665 if(!term.dirty[y])
3666 continue;
3667
3668 xtermclear(0, y, term.col, y);
3669 term.dirty[y] = 0;
3670 base = term.line[y][0];
3671 ic = ib = ox = 0;
3672 for(x = x1; x < x2; x++) {
3673 new = term.line[y][x];
3674 if(new.mode == ATTR_WDUMMY)
3675 continue;
3676 if(ena_sel && selected(x, y))
3677 new.mode ^= ATTR_REVERSE;
3678 if(ib > 0 && (ATTRCMP(base, new)
3679 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3680 xdraws(buf, base, ox, y, ic, ib);
3681 ic = ib = 0;
3682 }
3683 if(ib == 0) {
3684 ox = x;
3685 base = new;
3686 }
3687
3688 ib += utf8encode(new.u, buf+ib);
3689 ic += (new.mode & ATTR_WIDE)? 2 : 1;
3690 }
3691 if(ib > 0)
3692 xdraws(buf, base, ox, y, ic, ib);
3693 }
3694 xdrawcursor();
3695 }
3696
3697 void
3698 expose(XEvent *ev) {
3699 redraw();
3700 }
3701
3702 void
3703 visibility(XEvent *ev) {
3704 XVisibilityEvent *e = &ev->xvisibility;
3705
3706 MODBIT(xw.state, e->state != VisibilityFullyObscured, WIN_VISIBLE);
3707 }
3708
3709 void
3710 unmap(XEvent *ev) {
3711 xw.state &= ~WIN_VISIBLE;
3712 }
3713
3714 void
3715 xsetpointermotion(int set) {
3716 MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
3717 XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
3718 }
3719
3720 void
3721 xseturgency(int add) {
3722 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3723
3724 MODBIT(h->flags, add, XUrgencyHint);
3725 XSetWMHints(xw.dpy, xw.win, h);
3726 XFree(h);
3727 }
3728
3729 void
3730 focus(XEvent *ev) {
3731 XFocusChangeEvent *e = &ev->xfocus;
3732
3733 if(e->mode == NotifyGrab)
3734 return;
3735
3736 if(ev->type == FocusIn) {
3737 XSetICFocus(xw.xic);
3738 xw.state |= WIN_FOCUSED;
3739 xseturgency(0);
3740 if(IS_SET(MODE_FOCUS))
3741 ttywrite("\033[I", 3);
3742 } else {
3743 XUnsetICFocus(xw.xic);
3744 xw.state &= ~WIN_FOCUSED;
3745 if(IS_SET(MODE_FOCUS))
3746 ttywrite("\033[O", 3);
3747 }
3748 }
3749
3750 bool
3751 match(uint mask, uint state) {
3752 return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
3753 }
3754
3755 void
3756 numlock(const Arg *dummy) {
3757 term.numlock ^= 1;
3758 }
3759
3760 char*
3761 kmap(KeySym k, uint state) {
3762 Key *kp;
3763 int i;
3764
3765 /* Check for mapped keys out of X11 function keys. */
3766 for(i = 0; i < LEN(mappedkeys); i++) {
3767 if(mappedkeys[i] == k)
3768 break;
3769 }
3770 if(i == LEN(mappedkeys)) {
3771 if((k & 0xFFFF) < 0xFD00)
3772 return NULL;
3773 }
3774
3775 for(kp = key; kp < key + LEN(key); kp++) {
3776 if(kp->k != k)
3777 continue;
3778
3779 if(!match(kp->mask, state))
3780 continue;
3781
3782 if(IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
3783 continue;
3784 if(term.numlock && kp->appkey == 2)
3785 continue;
3786
3787 if(IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
3788 continue;
3789
3790 if(IS_SET(MODE_CRLF) ? kp->crlf < 0 : kp->crlf > 0)
3791 continue;
3792
3793 return kp->s;
3794 }
3795
3796 return NULL;
3797 }
3798
3799 void
3800 kpress(XEvent *ev) {
3801 XKeyEvent *e = &ev->xkey;
3802 KeySym ksym;
3803 char buf[32], *customkey;
3804 int len;
3805 long c;
3806 Status status;
3807 Shortcut *bp;
3808
3809 if(IS_SET(MODE_KBDLOCK))
3810 return;
3811
3812 len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
3813 /* 1. shortcuts */
3814 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3815 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3816 bp->func(&(bp->arg));
3817 return;
3818 }
3819 }
3820
3821 /* 2. custom keys from config.h */
3822 if((customkey = kmap(ksym, e->state))) {
3823 ttysend(customkey, strlen(customkey));
3824 return;
3825 }
3826
3827 /* 3. composed string from input method */
3828 if(len == 0)
3829 return;
3830 if(len == 1 && e->state & Mod1Mask) {
3831 if(IS_SET(MODE_8BIT)) {
3832 if(*buf < 0177) {
3833 c = *buf | 0x80;
3834 len = utf8encode(c, buf);
3835 }
3836 } else {
3837 buf[1] = buf[0];
3838 buf[0] = '\033';
3839 len = 2;
3840 }
3841 }
3842 ttysend(buf, len);
3843 }
3844
3845
3846 void
3847 cmessage(XEvent *e) {
3848 /*
3849 * See xembed specs
3850 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3851 */
3852 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3853 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3854 xw.state |= WIN_FOCUSED;
3855 xseturgency(0);
3856 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3857 xw.state &= ~WIN_FOCUSED;
3858 }
3859 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3860 /* Send SIGHUP to shell */
3861 kill(pid, SIGHUP);
3862 exit(EXIT_SUCCESS);
3863 }
3864 }
3865
3866 void
3867 cresize(int width, int height) {
3868 int col, row;
3869
3870 if(width != 0)
3871 xw.w = width;
3872 if(height != 0)
3873 xw.h = height;
3874
3875 col = (xw.w - 2 * borderpx) / xw.cw;
3876 row = (xw.h - 2 * borderpx) / xw.ch;
3877
3878 tresize(col, row);
3879 xresize(col, row);
3880 ttyresize();
3881 }
3882
3883 void
3884 resize(XEvent *e) {
3885 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3886 return;
3887
3888 cresize(e->xconfigure.width, e->xconfigure.height);
3889 }
3890
3891 void
3892 run(void) {
3893 XEvent ev;
3894 int w = xw.w, h = xw.h;
3895 fd_set rfd;
3896 int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3897 struct timespec drawtimeout, *tv = NULL, now, last, lastblink;
3898 long deltatime;
3899
3900 /* Waiting for window mapping */
3901 do {
3902 XNextEvent(xw.dpy, &ev);
3903 if(ev.type == ConfigureNotify) {
3904 w = ev.xconfigure.width;
3905 h = ev.xconfigure.height;
3906 }
3907 } while(ev.type != MapNotify);
3908
3909 ttynew();
3910 cresize(w, h);
3911
3912 clock_gettime(CLOCK_MONOTONIC, &last);
3913 lastblink = last;
3914
3915 for(xev = actionfps;;) {
3916 FD_ZERO(&rfd);
3917 FD_SET(cmdfd, &rfd);
3918 FD_SET(xfd, &rfd);
3919
3920 if(pselect(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv, NULL) < 0) {
3921 if(errno == EINTR)
3922 continue;
3923 die("select failed: %s\n", strerror(errno));
3924 }
3925 if(FD_ISSET(cmdfd, &rfd)) {
3926 ttyread();
3927 if(blinktimeout) {
3928 blinkset = tattrset(ATTR_BLINK);
3929 if(!blinkset)
3930 MODBIT(term.mode, 0, MODE_BLINK);
3931 }
3932 }
3933
3934 if(FD_ISSET(xfd, &rfd))
3935 xev = actionfps;
3936
3937 clock_gettime(CLOCK_MONOTONIC, &now);
3938 drawtimeout.tv_sec = 0;
3939 drawtimeout.tv_nsec = (1000 * 1E6)/ xfps;
3940 tv = &drawtimeout;
3941
3942 dodraw = 0;
3943 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
3944 tsetdirtattr(ATTR_BLINK);
3945 term.mode ^= MODE_BLINK;
3946 lastblink = now;
3947 dodraw = 1;
3948 }
3949 deltatime = TIMEDIFF(now, last);
3950 if(deltatime > 1000 / (xev ? xfps : actionfps)) {
3951 dodraw = 1;
3952 last = now;
3953 }
3954
3955 if(dodraw) {
3956 while(XPending(xw.dpy)) {
3957 XNextEvent(xw.dpy, &ev);
3958 if(XFilterEvent(&ev, None))
3959 continue;
3960 if(handler[ev.type])
3961 (handler[ev.type])(&ev);
3962 }
3963
3964 draw();
3965 XFlush(xw.dpy);
3966
3967 if(xev && !FD_ISSET(xfd, &rfd))
3968 xev--;
3969 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
3970 if(blinkset) {
3971 if(TIMEDIFF(now, lastblink) \
3972 > blinktimeout) {
3973 drawtimeout.tv_nsec = 1000;
3974 } else {
3975 drawtimeout.tv_nsec = (1E6 * \
3976 (blinktimeout - \
3977 TIMEDIFF(now,
3978 lastblink)));
3979 }
3980 drawtimeout.tv_sec = \
3981 drawtimeout.tv_nsec / 1E9;
3982 drawtimeout.tv_nsec %= (long)1E9;
3983 } else {
3984 tv = NULL;
3985 }
3986 }
3987 }
3988 }
3989 }
3990
3991 void
3992 usage(void) {
3993 die("%s " VERSION " (c) 2010-2015 st engineers\n"
3994 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]\n"
3995 " [-i] [-t title] [-w windowid] [-e command ...] [command ...]\n"
3996 " st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]\n"
3997 " [-i] [-t title] [-w windowid] [-l line] [stty_args ...]\n",
3998 argv0);
3999 }
4000
4001 int
4002 main(int argc, char *argv[]) {
4003 uint cols = 80, rows = 24;
4004
4005 xw.l = xw.t = 0;
4006 xw.isfixed = False;
4007 xw.cursor = 0;
4008
4009 ARGBEGIN {
4010 case 'a':
4011 allowaltscreen = false;
4012 break;
4013 case 'c':
4014 opt_class = EARGF(usage());
4015 break;
4016 case 'e':
4017 if(argc > 1)
4018 --argc, ++argv;
4019 goto run;
4020 case 'f':
4021 opt_font = EARGF(usage());
4022 break;
4023 case 'g':
4024 xw.gm = XParseGeometry(EARGF(usage()),
4025 &xw.l, &xw.t, &cols, &rows);
4026 break;
4027 case 'i':
4028 xw.isfixed = True;
4029 break;
4030 case 'o':
4031 opt_io = EARGF(usage());
4032 break;
4033 case 'l':
4034 opt_line = EARGF(usage());
4035 break;
4036 case 't':
4037 opt_title = EARGF(usage());
4038 break;
4039 case 'w':
4040 opt_embed = EARGF(usage());
4041 break;
4042 case 'v':
4043 default:
4044 usage();
4045 } ARGEND;
4046
4047 run:
4048 if(argc > 0) {
4049 /* eat all remaining arguments */
4050 opt_cmd = argv;
4051 if(!opt_title && !opt_line)
4052 opt_title = basename(xstrdup(argv[0]));
4053 }
4054 setlocale(LC_CTYPE, "");
4055 XSetLocaleModifiers("");
4056 tnew(MAX(cols, 1), MAX(rows, 1));
4057 xinit();
4058 selinit();
4059 run();
4060
4061 return 0;
4062 }
4063