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b042be2039b8ddc3a4121e09f23c865c89581fba
[st.git] / st.c
1 /* See LICENSE for license details. */
2 #include <ctype.h>
3 #include <errno.h>
4 #include <fcntl.h>
5 #include <limits.h>
6 #include <locale.h>
7 #include <pwd.h>
8 #include <stdarg.h>
9 #include <stdbool.h>
10 #include <stdio.h>
11 #include <stdlib.h>
12 #include <string.h>
13 #include <signal.h>
14 #include <stdint.h>
15 #include <sys/ioctl.h>
16 #include <sys/select.h>
17 #include <sys/stat.h>
18 #include <sys/time.h>
19 #include <sys/types.h>
20 #include <sys/wait.h>
21 #include <time.h>
22 #include <unistd.h>
23 #include <libgen.h>
24 #include <X11/Xatom.h>
25 #include <X11/Xlib.h>
26 #include <X11/Xutil.h>
27 #include <X11/cursorfont.h>
28 #include <X11/keysym.h>
29 #include <X11/Xft/Xft.h>
30 #include <X11/XKBlib.h>
31 #include <fontconfig/fontconfig.h>
32 #include <wchar.h>
33
34 #include "arg.h"
35
36 char *argv0;
37
38 #define Glyph Glyph_
39 #define Font Font_
40
41 #if defined(__linux)
42 #include <pty.h>
43 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
44 #include <util.h>
45 #elif defined(__FreeBSD__) || defined(__DragonFly__)
46 #include <libutil.h>
47 #endif
48
49
50 /* XEMBED messages */
51 #define XEMBED_FOCUS_IN 4
52 #define XEMBED_FOCUS_OUT 5
53
54 /* Arbitrary sizes */
55 #define UTF_INVALID 0xFFFD
56 #define UTF_SIZ 4
57 #define ESC_BUF_SIZ (128*UTF_SIZ)
58 #define ESC_ARG_SIZ 16
59 #define STR_BUF_SIZ ESC_BUF_SIZ
60 #define STR_ARG_SIZ ESC_ARG_SIZ
61 #define DRAW_BUF_SIZ 20*1024
62 #define XK_ANY_MOD UINT_MAX
63 #define XK_NO_MOD 0
64 #define XK_SWITCH_MOD (1<<13)
65
66 /* macros */
67 #define MIN(a, b) ((a) < (b) ? (a) : (b))
68 #define MAX(a, b) ((a) < (b) ? (b) : (a))
69 #define LEN(a) (sizeof(a) / sizeof(a)[0])
70 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
71 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
72 #define ISCONTROLC0(c) (BETWEEN(c, 0, 0x1f) || (c) == '\177')
73 #define ISCONTROLC1(c) (BETWEEN(c, 0x80, 0x9f))
74 #define ISCONTROL(c) (ISCONTROLC0(c) || ISCONTROLC1(c))
75 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
76 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
77 #define IS_SET(flag) ((term.mode & (flag)) != 0)
78 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_nsec-t2.tv_nsec)/1E6)
79 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
80
81 #define TRUECOLOR(r,g,b) (1 << 24 | (r) << 16 | (g) << 8 | (b))
82 #define IS_TRUECOL(x) (1 << 24 & (x))
83 #define TRUERED(x) (((x) & 0xff0000) >> 8)
84 #define TRUEGREEN(x) (((x) & 0xff00))
85 #define TRUEBLUE(x) (((x) & 0xff) << 8)
86
87
88 enum glyph_attribute {
89 ATTR_NULL = 0,
90 ATTR_BOLD = 1 << 0,
91 ATTR_FAINT = 1 << 1,
92 ATTR_ITALIC = 1 << 2,
93 ATTR_UNDERLINE = 1 << 3,
94 ATTR_BLINK = 1 << 4,
95 ATTR_REVERSE = 1 << 5,
96 ATTR_INVISIBLE = 1 << 6,
97 ATTR_STRUCK = 1 << 7,
98 ATTR_WRAP = 1 << 8,
99 ATTR_WIDE = 1 << 9,
100 ATTR_WDUMMY = 1 << 10,
101 };
102
103 enum cursor_movement {
104 CURSOR_SAVE,
105 CURSOR_LOAD
106 };
107
108 enum cursor_state {
109 CURSOR_DEFAULT = 0,
110 CURSOR_WRAPNEXT = 1,
111 CURSOR_ORIGIN = 2
112 };
113
114 enum term_mode {
115 MODE_WRAP = 1 << 0,
116 MODE_INSERT = 1 << 1,
117 MODE_APPKEYPAD = 1 << 2,
118 MODE_ALTSCREEN = 1 << 3,
119 MODE_CRLF = 1 << 4,
120 MODE_MOUSEBTN = 1 << 5,
121 MODE_MOUSEMOTION = 1 << 6,
122 MODE_REVERSE = 1 << 7,
123 MODE_KBDLOCK = 1 << 8,
124 MODE_HIDE = 1 << 9,
125 MODE_ECHO = 1 << 10,
126 MODE_APPCURSOR = 1 << 11,
127 MODE_MOUSESGR = 1 << 12,
128 MODE_8BIT = 1 << 13,
129 MODE_BLINK = 1 << 14,
130 MODE_FBLINK = 1 << 15,
131 MODE_FOCUS = 1 << 16,
132 MODE_MOUSEX10 = 1 << 17,
133 MODE_MOUSEMANY = 1 << 18,
134 MODE_BRCKTPASTE = 1 << 19,
135 MODE_PRINT = 1 << 20,
136 MODE_MOUSE = MODE_MOUSEBTN|MODE_MOUSEMOTION|MODE_MOUSEX10\
137 |MODE_MOUSEMANY,
138 };
139
140 enum charset {
141 CS_GRAPHIC0,
142 CS_GRAPHIC1,
143 CS_UK,
144 CS_USA,
145 CS_MULTI,
146 CS_GER,
147 CS_FIN
148 };
149
150 enum escape_state {
151 ESC_START = 1,
152 ESC_CSI = 2,
153 ESC_STR = 4, /* DCS, OSC, PM, APC */
154 ESC_ALTCHARSET = 8,
155 ESC_STR_END = 16, /* a final string was encountered */
156 ESC_TEST = 32, /* Enter in test mode */
157 };
158
159 enum window_state {
160 WIN_VISIBLE = 1,
161 WIN_FOCUSED = 2
162 };
163
164 enum selection_type {
165 SEL_REGULAR = 1,
166 SEL_RECTANGULAR = 2
167 };
168
169 enum selection_snap {
170 SNAP_WORD = 1,
171 SNAP_LINE = 2
172 };
173
174 typedef unsigned char uchar;
175 typedef unsigned int uint;
176 typedef unsigned long ulong;
177 typedef unsigned short ushort;
178
179 typedef XftDraw *Draw;
180 typedef XftColor Color;
181
182 typedef struct {
183 char c[UTF_SIZ]; /* character code */
184 ushort mode; /* attribute flags */
185 uint32_t fg; /* foreground */
186 uint32_t bg; /* background */
187 } Glyph;
188
189 typedef Glyph *Line;
190
191 typedef struct {
192 Glyph attr; /* current char attributes */
193 int x;
194 int y;
195 char state;
196 } TCursor;
197
198 /* CSI Escape sequence structs */
199 /* ESC '[' [[ [<priv>] <arg> [;]] <mode> [<mode>]] */
200 typedef struct {
201 char buf[ESC_BUF_SIZ]; /* raw string */
202 int len; /* raw string length */
203 char priv;
204 int arg[ESC_ARG_SIZ];
205 int narg; /* nb of args */
206 char mode[2];
207 } CSIEscape;
208
209 /* STR Escape sequence structs */
210 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
211 typedef struct {
212 char type; /* ESC type ... */
213 char buf[STR_BUF_SIZ]; /* raw string */
214 int len; /* raw string length */
215 char *args[STR_ARG_SIZ];
216 int narg; /* nb of args */
217 } STREscape;
218
219 /* Internal representation of the screen */
220 typedef struct {
221 int row; /* nb row */
222 int col; /* nb col */
223 Line *line; /* screen */
224 Line *alt; /* alternate screen */
225 bool *dirty; /* dirtyness of lines */
226 TCursor c; /* cursor */
227 int top; /* top scroll limit */
228 int bot; /* bottom scroll limit */
229 int mode; /* terminal mode flags */
230 int esc; /* escape state flags */
231 char trantbl[4]; /* charset table translation */
232 int charset; /* current charset */
233 int icharset; /* selected charset for sequence */
234 bool numlock; /* lock numbers in keyboard */
235 bool *tabs;
236 } Term;
237
238 /* Purely graphic info */
239 typedef struct {
240 Display *dpy;
241 Colormap cmap;
242 Window win;
243 Drawable buf;
244 Atom xembed, wmdeletewin, netwmname, netwmpid;
245 XIM xim;
246 XIC xic;
247 Draw draw;
248 Visual *vis;
249 XSetWindowAttributes attrs;
250 int scr;
251 bool isfixed; /* is fixed geometry? */
252 int l, t; /* left and top offset */
253 int gm; /* geometry mask */
254 int tw, th; /* tty width and height */
255 int w, h; /* window width and height */
256 int ch; /* char height */
257 int cw; /* char width */
258 char state; /* focus, redraw, visible */
259 int cursor; /* cursor style */
260 } XWindow;
261
262 typedef struct {
263 uint b;
264 uint mask;
265 char *s;
266 } Mousekey;
267
268 typedef struct {
269 KeySym k;
270 uint mask;
271 char *s;
272 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
273 signed char appkey; /* application keypad */
274 signed char appcursor; /* application cursor */
275 signed char crlf; /* crlf mode */
276 } Key;
277
278 typedef struct {
279 int mode;
280 int type;
281 int snap;
282 /*
283 * Selection variables:
284 * nb – normalized coordinates of the beginning of the selection
285 * ne – normalized coordinates of the end of the selection
286 * ob – original coordinates of the beginning of the selection
287 * oe – original coordinates of the end of the selection
288 */
289 struct {
290 int x, y;
291 } nb, ne, ob, oe;
292
293 char *primary, *clipboard;
294 Atom xtarget;
295 bool alt;
296 struct timespec tclick1;
297 struct timespec tclick2;
298 } Selection;
299
300 typedef union {
301 int i;
302 uint ui;
303 float f;
304 const void *v;
305 } Arg;
306
307 typedef struct {
308 uint mod;
309 KeySym keysym;
310 void (*func)(const Arg *);
311 const Arg arg;
312 } Shortcut;
313
314 /* function definitions used in config.h */
315 static void clipcopy(const Arg *);
316 static void clippaste(const Arg *);
317 static void numlock(const Arg *);
318 static void selpaste(const Arg *);
319 static void xzoom(const Arg *);
320 static void xzoomabs(const Arg *);
321 static void xzoomreset(const Arg *);
322 static void printsel(const Arg *);
323 static void printscreen(const Arg *) ;
324 static void toggleprinter(const Arg *);
325
326 /* Config.h for applying patches and the configuration. */
327 #include "config.h"
328
329 /* Font structure */
330 typedef struct {
331 int height;
332 int width;
333 int ascent;
334 int descent;
335 short lbearing;
336 short rbearing;
337 XftFont *match;
338 FcFontSet *set;
339 FcPattern *pattern;
340 } Font;
341
342 /* Drawing Context */
343 typedef struct {
344 Color col[MAX(LEN(colorname), 256)];
345 Font font, bfont, ifont, ibfont;
346 GC gc;
347 } DC;
348
349 static void die(const char *, ...);
350 static void draw(void);
351 static void redraw(void);
352 static void drawregion(int, int, int, int);
353 static void execsh(void);
354 static void stty(void);
355 static void sigchld(int);
356 static void run(void);
357
358 static void csidump(void);
359 static void csihandle(void);
360 static void csiparse(void);
361 static void csireset(void);
362 static int eschandle(uchar);
363 static void strdump(void);
364 static void strhandle(void);
365 static void strparse(void);
366 static void strreset(void);
367
368 static int tattrset(int);
369 static void tprinter(char *, size_t);
370 static void tdumpsel(void);
371 static void tdumpline(int);
372 static void tdump(void);
373 static void tclearregion(int, int, int, int);
374 static void tcursor(int);
375 static void tdeletechar(int);
376 static void tdeleteline(int);
377 static void tinsertblank(int);
378 static void tinsertblankline(int);
379 static int tlinelen(int);
380 static void tmoveto(int, int);
381 static void tmoveato(int, int);
382 static void tnew(int, int);
383 static void tnewline(int);
384 static void tputtab(int);
385 static void tputc(char *, int);
386 static void treset(void);
387 static void tresize(int, int);
388 static void tscrollup(int, int);
389 static void tscrolldown(int, int);
390 static void tsetattr(int *, int);
391 static void tsetchar(char *, Glyph *, int, int);
392 static void tsetscroll(int, int);
393 static void tswapscreen(void);
394 static void tsetdirt(int, int);
395 static void tsetdirtattr(int);
396 static void tsetmode(bool, bool, int *, int);
397 static void tfulldirt(void);
398 static void techo(char *, int);
399 static void tcontrolcode(uchar );
400 static void tdectest(char );
401 static int32_t tdefcolor(int *, int *, int);
402 static void tdeftran(char);
403 static inline bool match(uint, uint);
404 static void ttynew(void);
405 static void ttyread(void);
406 static void ttyresize(void);
407 static void ttysend(char *, size_t);
408 static void ttywrite(const char *, size_t);
409 static void tstrsequence(uchar);
410
411 static inline ushort sixd_to_16bit(int);
412 static void xdraws(char *, Glyph, int, int, int, int);
413 static void xhints(void);
414 static void xclear(int, int, int, int);
415 static void xdrawcursor(void);
416 static void xinit(void);
417 static void xloadcols(void);
418 static int xsetcolorname(int, const char *);
419 static int xgeommasktogravity(int);
420 static int xloadfont(Font *, FcPattern *);
421 static void xloadfonts(char *, double);
422 static void xsettitle(char *);
423 static void xresettitle(void);
424 static void xsetpointermotion(int);
425 static void xseturgency(int);
426 static void xsetsel(char *, Time);
427 static void xtermclear(int, int, int, int);
428 static void xunloadfont(Font *);
429 static void xunloadfonts(void);
430 static void xresize(int, int);
431
432 static void expose(XEvent *);
433 static void visibility(XEvent *);
434 static void unmap(XEvent *);
435 static char *kmap(KeySym, uint);
436 static void kpress(XEvent *);
437 static void cmessage(XEvent *);
438 static void cresize(int, int);
439 static void resize(XEvent *);
440 static void focus(XEvent *);
441 static void brelease(XEvent *);
442 static void bpress(XEvent *);
443 static void bmotion(XEvent *);
444 static void selnotify(XEvent *);
445 static void selclear(XEvent *);
446 static void selrequest(XEvent *);
447
448 static void selinit(void);
449 static void selnormalize(void);
450 static inline bool selected(int, int);
451 static char *getsel(void);
452 static void selcopy(Time);
453 static void selscroll(int, int);
454 static void selsnap(int, int *, int *, int);
455 static int x2col(int);
456 static int y2row(int);
457 static void getbuttoninfo(XEvent *);
458 static void mousereport(XEvent *);
459
460 static size_t utf8decode(char *, long *, size_t);
461 static long utf8decodebyte(char, size_t *);
462 static size_t utf8encode(long, char *, size_t);
463 static char utf8encodebyte(long, size_t);
464 static size_t utf8len(char *);
465 static size_t utf8validate(long *, size_t);
466
467 static ssize_t xwrite(int, const char *, size_t);
468 static void *xmalloc(size_t);
469 static void *xrealloc(void *, size_t);
470 static char *xstrdup(char *);
471
472 static void usage(void);
473
474 static void (*handler[LASTEvent])(XEvent *) = {
475 [KeyPress] = kpress,
476 [ClientMessage] = cmessage,
477 [ConfigureNotify] = resize,
478 [VisibilityNotify] = visibility,
479 [UnmapNotify] = unmap,
480 [Expose] = expose,
481 [FocusIn] = focus,
482 [FocusOut] = focus,
483 [MotionNotify] = bmotion,
484 [ButtonPress] = bpress,
485 [ButtonRelease] = brelease,
486 /*
487 * Uncomment if you want the selection to disappear when you select something
488 * different in another window.
489 */
490 /* [SelectionClear] = selclear, */
491 [SelectionNotify] = selnotify,
492 [SelectionRequest] = selrequest,
493 };
494
495 /* Globals */
496 static DC dc;
497 static XWindow xw;
498 static Term term;
499 static CSIEscape csiescseq;
500 static STREscape strescseq;
501 static int cmdfd;
502 static pid_t pid;
503 static Selection sel;
504 static int iofd = STDOUT_FILENO;
505 static char **opt_cmd = NULL;
506 static char *opt_io = NULL;
507 static char *opt_title = NULL;
508 static char *opt_embed = NULL;
509 static char *opt_class = NULL;
510 static char *opt_font = NULL;
511 static char *opt_line = NULL;
512 static int oldbutton = 3; /* button event on startup: 3 = release */
513
514 static char *usedfont = NULL;
515 static double usedfontsize = 0;
516 static double defaultfontsize = 0;
517
518 static uchar utfbyte[UTF_SIZ + 1] = {0x80, 0, 0xC0, 0xE0, 0xF0};
519 static uchar utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
520 static long utfmin[UTF_SIZ + 1] = { 0, 0, 0x80, 0x800, 0x10000};
521 static long utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
522
523 /* Font Ring Cache */
524 enum {
525 FRC_NORMAL,
526 FRC_ITALIC,
527 FRC_BOLD,
528 FRC_ITALICBOLD
529 };
530
531 typedef struct {
532 XftFont *font;
533 int flags;
534 long unicodep;
535 } Fontcache;
536
537 /* Fontcache is an array now. A new font will be appended to the array. */
538 static Fontcache frc[16];
539 static int frclen = 0;
540
541 ssize_t
542 xwrite(int fd, const char *s, size_t len) {
543 size_t aux = len;
544
545 while(len > 0) {
546 ssize_t r = write(fd, s, len);
547 if(r < 0)
548 return r;
549 len -= r;
550 s += r;
551 }
552 return aux;
553 }
554
555 void *
556 xmalloc(size_t len) {
557 void *p = malloc(len);
558
559 if(!p)
560 die("Out of memory\n");
561
562 return p;
563 }
564
565 void *
566 xrealloc(void *p, size_t len) {
567 if((p = realloc(p, len)) == NULL)
568 die("Out of memory\n");
569
570 return p;
571 }
572
573 char *
574 xstrdup(char *s) {
575 if((s = strdup(s)) == NULL)
576 die("Out of memory\n");
577
578 return s;
579 }
580
581 size_t
582 utf8decode(char *c, long *u, size_t clen) {
583 size_t i, j, len, type;
584 long udecoded;
585
586 *u = UTF_INVALID;
587 if(!clen)
588 return 0;
589 udecoded = utf8decodebyte(c[0], &len);
590 if(!BETWEEN(len, 1, UTF_SIZ))
591 return 1;
592 for(i = 1, j = 1; i < clen && j < len; ++i, ++j) {
593 udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
594 if(type != 0)
595 return j;
596 }
597 if(j < len)
598 return 0;
599 *u = udecoded;
600 utf8validate(u, len);
601 return len;
602 }
603
604 long
605 utf8decodebyte(char c, size_t *i) {
606 for(*i = 0; *i < LEN(utfmask); ++(*i))
607 if(((uchar)c & utfmask[*i]) == utfbyte[*i])
608 return (uchar)c & ~utfmask[*i];
609 return 0;
610 }
611
612 size_t
613 utf8encode(long u, char *c, size_t clen) {
614 size_t len, i;
615
616 len = utf8validate(&u, 0);
617 if(clen < len)
618 return 0;
619 for(i = len - 1; i != 0; --i) {
620 c[i] = utf8encodebyte(u, 0);
621 u >>= 6;
622 }
623 c[0] = utf8encodebyte(u, len);
624 return len;
625 }
626
627 char
628 utf8encodebyte(long u, size_t i) {
629 return utfbyte[i] | (u & ~utfmask[i]);
630 }
631
632 size_t
633 utf8len(char *c) {
634 return utf8decode(c, &(long){0}, UTF_SIZ);
635 }
636
637 size_t
638 utf8validate(long *u, size_t i) {
639 if(!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF))
640 *u = UTF_INVALID;
641 for(i = 1; *u > utfmax[i]; ++i)
642 ;
643 return i;
644 }
645
646 void
647 selinit(void) {
648 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
649 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
650 sel.mode = 0;
651 sel.ob.x = -1;
652 sel.primary = NULL;
653 sel.clipboard = NULL;
654 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
655 if(sel.xtarget == None)
656 sel.xtarget = XA_STRING;
657 }
658
659 int
660 x2col(int x) {
661 x -= borderpx;
662 x /= xw.cw;
663
664 return LIMIT(x, 0, term.col-1);
665 }
666
667 int
668 y2row(int y) {
669 y -= borderpx;
670 y /= xw.ch;
671
672 return LIMIT(y, 0, term.row-1);
673 }
674
675 int
676 tlinelen(int y) {
677 int i = term.col;
678
679 if(term.line[y][i - 1].mode & ATTR_WRAP)
680 return i;
681
682 while(i > 0 && term.line[y][i - 1].c[0] == ' ')
683 --i;
684
685 return i;
686 }
687
688 void
689 selnormalize(void) {
690 int i;
691
692 if(sel.ob.y == sel.oe.y || sel.type == SEL_RECTANGULAR) {
693 sel.nb.x = MIN(sel.ob.x, sel.oe.x);
694 sel.ne.x = MAX(sel.ob.x, sel.oe.x);
695 } else {
696 sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
697 sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
698 }
699 sel.nb.y = MIN(sel.ob.y, sel.oe.y);
700 sel.ne.y = MAX(sel.ob.y, sel.oe.y);
701
702 selsnap(sel.snap, &sel.nb.x, &sel.nb.y, -1);
703 selsnap(sel.snap, &sel.ne.x, &sel.ne.y, +1);
704
705 /* expand selection over line breaks */
706 if (sel.type == SEL_RECTANGULAR)
707 return;
708 i = tlinelen(sel.nb.y);
709 if (i < sel.nb.x)
710 sel.nb.x = i;
711 if (tlinelen(sel.ne.y) <= sel.ne.x)
712 sel.ne.x = term.col - 1;
713 }
714
715 bool
716 selected(int x, int y) {
717 if(sel.type == SEL_RECTANGULAR)
718 return BETWEEN(y, sel.nb.y, sel.ne.y)
719 && BETWEEN(x, sel.nb.x, sel.ne.x);
720
721 return BETWEEN(y, sel.nb.y, sel.ne.y)
722 && (y != sel.nb.y || x >= sel.nb.x)
723 && (y != sel.ne.y || x <= sel.ne.x);
724 }
725
726 void
727 selsnap(int mode, int *x, int *y, int direction) {
728 int newx, newy, xt, yt;
729 bool delim, prevdelim;
730 Glyph *gp, *prevgp;
731
732 switch(mode) {
733 case SNAP_WORD:
734 /*
735 * Snap around if the word wraps around at the end or
736 * beginning of a line.
737 */
738 prevgp = &term.line[*y][*x];
739 prevdelim = strchr(worddelimiters, prevgp->c[0]) != NULL;
740 for(;;) {
741 newx = *x + direction;
742 newy = *y;
743 if(!BETWEEN(newx, 0, term.col - 1)) {
744 newy += direction;
745 newx = (newx + term.col) % term.col;
746 if (!BETWEEN(newy, 0, term.row - 1))
747 break;
748
749 if(direction > 0)
750 yt = *y, xt = *x;
751 else
752 yt = newy, xt = newx;
753 if(!(term.line[yt][xt].mode & ATTR_WRAP))
754 break;
755 }
756
757 if (newx >= tlinelen(newy))
758 break;
759
760 gp = &term.line[newy][newx];
761 delim = strchr(worddelimiters, gp->c[0]) != NULL;
762 if(!(gp->mode & ATTR_WDUMMY) && (delim != prevdelim
763 || (delim && gp->c[0] != prevgp->c[0])))
764 break;
765
766 *x = newx;
767 *y = newy;
768 prevgp = gp;
769 prevdelim = delim;
770 }
771 break;
772 case SNAP_LINE:
773 /*
774 * Snap around if the the previous line or the current one
775 * has set ATTR_WRAP at its end. Then the whole next or
776 * previous line will be selected.
777 */
778 *x = (direction < 0) ? 0 : term.col - 1;
779 if(direction < 0 && *y > 0) {
780 for(; *y > 0; *y += direction) {
781 if(!(term.line[*y-1][term.col-1].mode
782 & ATTR_WRAP)) {
783 break;
784 }
785 }
786 } else if(direction > 0 && *y < term.row-1) {
787 for(; *y < term.row; *y += direction) {
788 if(!(term.line[*y][term.col-1].mode
789 & ATTR_WRAP)) {
790 break;
791 }
792 }
793 }
794 break;
795 }
796 }
797
798 void
799 getbuttoninfo(XEvent *e) {
800 int type;
801 uint state = e->xbutton.state & ~(Button1Mask | forceselmod);
802
803 sel.alt = IS_SET(MODE_ALTSCREEN);
804
805 sel.oe.x = x2col(e->xbutton.x);
806 sel.oe.y = y2row(e->xbutton.y);
807 selnormalize();
808
809 sel.type = SEL_REGULAR;
810 for(type = 1; type < LEN(selmasks); ++type) {
811 if(match(selmasks[type], state)) {
812 sel.type = type;
813 break;
814 }
815 }
816 }
817
818 void
819 mousereport(XEvent *e) {
820 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
821 button = e->xbutton.button, state = e->xbutton.state,
822 len;
823 char buf[40];
824 static int ox, oy;
825
826 /* from urxvt */
827 if(e->xbutton.type == MotionNotify) {
828 if(x == ox && y == oy)
829 return;
830 if(!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
831 return;
832 /* MOUSE_MOTION: no reporting if no button is pressed */
833 if(IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
834 return;
835
836 button = oldbutton + 32;
837 ox = x;
838 oy = y;
839 } else {
840 if(!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
841 button = 3;
842 } else {
843 button -= Button1;
844 if(button >= 3)
845 button += 64 - 3;
846 }
847 if(e->xbutton.type == ButtonPress) {
848 oldbutton = button;
849 ox = x;
850 oy = y;
851 } else if(e->xbutton.type == ButtonRelease) {
852 oldbutton = 3;
853 /* MODE_MOUSEX10: no button release reporting */
854 if(IS_SET(MODE_MOUSEX10))
855 return;
856 if (button == 64 || button == 65)
857 return;
858 }
859 }
860
861 if(!IS_SET(MODE_MOUSEX10)) {
862 button += (state & ShiftMask ? 4 : 0)
863 + (state & Mod4Mask ? 8 : 0)
864 + (state & ControlMask ? 16 : 0);
865 }
866
867 len = 0;
868 if(IS_SET(MODE_MOUSESGR)) {
869 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
870 button, x+1, y+1,
871 e->xbutton.type == ButtonRelease ? 'm' : 'M');
872 } else if(x < 223 && y < 223) {
873 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
874 32+button, 32+x+1, 32+y+1);
875 } else {
876 return;
877 }
878
879 ttywrite(buf, len);
880 }
881
882 void
883 bpress(XEvent *e) {
884 struct timespec now;
885 Mousekey *mk;
886
887 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
888 mousereport(e);
889 return;
890 }
891
892 for(mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
893 if(e->xbutton.button == mk->b
894 && match(mk->mask, e->xbutton.state)) {
895 ttysend(mk->s, strlen(mk->s));
896 return;
897 }
898 }
899
900 if(e->xbutton.button == Button1) {
901 clock_gettime(CLOCK_MONOTONIC, &now);
902
903 /* Clear previous selection, logically and visually. */
904 selclear(NULL);
905 sel.mode = 1;
906 sel.type = SEL_REGULAR;
907 sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
908 sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
909
910 /*
911 * If the user clicks below predefined timeouts specific
912 * snapping behaviour is exposed.
913 */
914 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
915 sel.snap = SNAP_LINE;
916 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
917 sel.snap = SNAP_WORD;
918 } else {
919 sel.snap = 0;
920 }
921 selnormalize();
922
923 /*
924 * Draw selection, unless it's regular and we don't want to
925 * make clicks visible
926 */
927 if(sel.snap != 0) {
928 sel.mode++;
929 tsetdirt(sel.nb.y, sel.ne.y);
930 }
931 sel.tclick2 = sel.tclick1;
932 sel.tclick1 = now;
933 }
934 }
935
936 char *
937 getsel(void) {
938 char *str, *ptr;
939 int y, bufsize, size, lastx, linelen;
940 Glyph *gp, *last;
941
942 if(sel.ob.x == -1)
943 return NULL;
944
945 bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
946 ptr = str = xmalloc(bufsize);
947
948 /* append every set & selected glyph to the selection */
949 for(y = sel.nb.y; y <= sel.ne.y; y++) {
950 linelen = tlinelen(y);
951
952 if(sel.type == SEL_RECTANGULAR) {
953 gp = &term.line[y][sel.nb.x];
954 lastx = sel.ne.x;
955 } else {
956 gp = &term.line[y][sel.nb.y == y ? sel.nb.x : 0];
957 lastx = (sel.ne.y == y) ? sel.ne.x : term.col-1;
958 }
959 last = &term.line[y][MIN(lastx, linelen-1)];
960 while(last >= gp && last->c[0] == ' ')
961 --last;
962
963 for( ; gp <= last; ++gp) {
964 if(gp->mode & ATTR_WDUMMY)
965 continue;
966
967 size = utf8len(gp->c);
968 memcpy(ptr, gp->c, size);
969 ptr += size;
970 }
971
972 /*
973 * Copy and pasting of line endings is inconsistent
974 * in the inconsistent terminal and GUI world.
975 * The best solution seems like to produce '\n' when
976 * something is copied from st and convert '\n' to
977 * '\r', when something to be pasted is received by
978 * st.
979 * FIXME: Fix the computer world.
980 */
981 if((y < sel.ne.y || lastx >= linelen) && !(last->mode & ATTR_WRAP))
982 *ptr++ = '\n';
983 }
984 *ptr = 0;
985 return str;
986 }
987
988 void
989 selcopy(Time t) {
990 xsetsel(getsel(), t);
991 }
992
993 void
994 selnotify(XEvent *e) {
995 ulong nitems, ofs, rem;
996 int format;
997 uchar *data, *last, *repl;
998 Atom type;
999 XSelectionEvent *xsev;
1000
1001 ofs = 0;
1002 xsev = &e->xselection;
1003 if (xsev->property == None)
1004 return;
1005 do {
1006 if(XGetWindowProperty(xw.dpy, xw.win, xsev->property, ofs,
1007 BUFSIZ/4, False, AnyPropertyType,
1008 &type, &format, &nitems, &rem,
1009 &data)) {
1010 fprintf(stderr, "Clipboard allocation failed\n");
1011 return;
1012 }
1013
1014 /*
1015 * As seen in getsel:
1016 * Line endings are inconsistent in the terminal and GUI world
1017 * copy and pasting. When receiving some selection data,
1018 * replace all '\n' with '\r'.
1019 * FIXME: Fix the computer world.
1020 */
1021 repl = data;
1022 last = data + nitems * format / 8;
1023 while((repl = memchr(repl, '\n', last - repl))) {
1024 *repl++ = '\r';
1025 }
1026
1027 if(IS_SET(MODE_BRCKTPASTE))
1028 ttywrite("\033[200~", 6);
1029 ttysend((char *)data, nitems * format / 8);
1030 if(IS_SET(MODE_BRCKTPASTE))
1031 ttywrite("\033[201~", 6);
1032 XFree(data);
1033 /* number of 32-bit chunks returned */
1034 ofs += nitems * format / 32;
1035 } while(rem > 0);
1036 }
1037
1038 void
1039 selpaste(const Arg *dummy) {
1040 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
1041 xw.win, CurrentTime);
1042 }
1043
1044 void
1045 clipcopy(const Arg *dummy) {
1046 Atom clipboard;
1047
1048 if(sel.clipboard != NULL)
1049 free(sel.clipboard);
1050
1051 if(sel.primary != NULL) {
1052 sel.clipboard = xstrdup(sel.primary);
1053 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1054 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
1055 }
1056 }
1057
1058 void
1059 clippaste(const Arg *dummy) {
1060 Atom clipboard;
1061
1062 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1063 XConvertSelection(xw.dpy, clipboard, sel.xtarget, clipboard,
1064 xw.win, CurrentTime);
1065 }
1066
1067 void
1068 selclear(XEvent *e) {
1069 if(sel.ob.x == -1)
1070 return;
1071 sel.ob.x = -1;
1072 tsetdirt(sel.nb.y, sel.ne.y);
1073 }
1074
1075 void
1076 selrequest(XEvent *e) {
1077 XSelectionRequestEvent *xsre;
1078 XSelectionEvent xev;
1079 Atom xa_targets, string, clipboard;
1080 char *seltext;
1081
1082 xsre = (XSelectionRequestEvent *) e;
1083 xev.type = SelectionNotify;
1084 xev.requestor = xsre->requestor;
1085 xev.selection = xsre->selection;
1086 xev.target = xsre->target;
1087 xev.time = xsre->time;
1088 if (xsre->property == None)
1089 xsre->property = xsre->target;
1090
1091 /* reject */
1092 xev.property = None;
1093
1094 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
1095 if(xsre->target == xa_targets) {
1096 /* respond with the supported type */
1097 string = sel.xtarget;
1098 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1099 XA_ATOM, 32, PropModeReplace,
1100 (uchar *) &string, 1);
1101 xev.property = xsre->property;
1102 } else if(xsre->target == sel.xtarget || xsre->target == XA_STRING) {
1103 /*
1104 * xith XA_STRING non ascii characters may be incorrect in the
1105 * requestor. It is not our problem, use utf8.
1106 */
1107 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1108 if(xsre->selection == XA_PRIMARY) {
1109 seltext = sel.primary;
1110 } else if(xsre->selection == clipboard) {
1111 seltext = sel.clipboard;
1112 } else {
1113 fprintf(stderr,
1114 "Unhandled clipboard selection 0x%lx\n",
1115 xsre->selection);
1116 return;
1117 }
1118 if(seltext != NULL) {
1119 XChangeProperty(xsre->display, xsre->requestor,
1120 xsre->property, xsre->target,
1121 8, PropModeReplace,
1122 (uchar *)seltext, strlen(seltext));
1123 xev.property = xsre->property;
1124 }
1125 }
1126
1127 /* all done, send a notification to the listener */
1128 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
1129 fprintf(stderr, "Error sending SelectionNotify event\n");
1130 }
1131
1132 void
1133 xsetsel(char *str, Time t) {
1134 free(sel.primary);
1135 sel.primary = str;
1136
1137 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, t);
1138 if (XGetSelectionOwner(xw.dpy, XA_PRIMARY) != xw.win)
1139 selclear(0);
1140 }
1141
1142 void
1143 brelease(XEvent *e) {
1144 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1145 mousereport(e);
1146 return;
1147 }
1148
1149 if(e->xbutton.button == Button2) {
1150 selpaste(NULL);
1151 } else if(e->xbutton.button == Button1) {
1152 if(sel.mode < 2) {
1153 selclear(NULL);
1154 } else {
1155 getbuttoninfo(e);
1156 selcopy(e->xbutton.time);
1157 }
1158 sel.mode = 0;
1159 tsetdirt(sel.nb.y, sel.ne.y);
1160 }
1161 }
1162
1163 void
1164 bmotion(XEvent *e) {
1165 int oldey, oldex, oldsby, oldsey;
1166
1167 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1168 mousereport(e);
1169 return;
1170 }
1171
1172 if(!sel.mode)
1173 return;
1174
1175 sel.mode++;
1176 oldey = sel.oe.y;
1177 oldex = sel.oe.x;
1178 oldsby = sel.nb.y;
1179 oldsey = sel.ne.y;
1180 getbuttoninfo(e);
1181
1182 if(oldey != sel.oe.y || oldex != sel.oe.x)
1183 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
1184 }
1185
1186 void
1187 die(const char *errstr, ...) {
1188 va_list ap;
1189
1190 va_start(ap, errstr);
1191 vfprintf(stderr, errstr, ap);
1192 va_end(ap);
1193 exit(EXIT_FAILURE);
1194 }
1195
1196 void
1197 execsh(void) {
1198 char **args, *sh, *prog;
1199 const struct passwd *pw;
1200 char buf[sizeof(long) * 8 + 1];
1201
1202 errno = 0;
1203 if((pw = getpwuid(getuid())) == NULL) {
1204 if(errno)
1205 die("getpwuid:%s\n", strerror(errno));
1206 else
1207 die("who are you?\n");
1208 }
1209
1210 if (!(sh = getenv("SHELL"))) {
1211 sh = (pw->pw_shell[0]) ? pw->pw_shell : shell;
1212 }
1213
1214 if(opt_cmd)
1215 prog = opt_cmd[0];
1216 else if(utmp)
1217 prog = utmp;
1218 else
1219 prog = sh;
1220 args = (opt_cmd) ? opt_cmd : (char *[]) {prog, NULL};
1221
1222 snprintf(buf, sizeof(buf), "%lu", xw.win);
1223
1224 unsetenv("COLUMNS");
1225 unsetenv("LINES");
1226 unsetenv("TERMCAP");
1227 setenv("LOGNAME", pw->pw_name, 1);
1228 setenv("USER", pw->pw_name, 1);
1229 setenv("SHELL", sh, 1);
1230 setenv("HOME", pw->pw_dir, 1);
1231 setenv("TERM", termname, 1);
1232 setenv("WINDOWID", buf, 1);
1233
1234 signal(SIGCHLD, SIG_DFL);
1235 signal(SIGHUP, SIG_DFL);
1236 signal(SIGINT, SIG_DFL);
1237 signal(SIGQUIT, SIG_DFL);
1238 signal(SIGTERM, SIG_DFL);
1239 signal(SIGALRM, SIG_DFL);
1240
1241 execvp(prog, args);
1242 _exit(EXIT_FAILURE);
1243 }
1244
1245 void
1246 sigchld(int a) {
1247 int stat, ret;
1248
1249 if(waitpid(pid, &stat, 0) < 0)
1250 die("Waiting for pid %hd failed: %s\n", pid, strerror(errno));
1251
1252 ret = WIFEXITED(stat) ? WEXITSTATUS(stat) : EXIT_FAILURE;
1253 if (ret != EXIT_SUCCESS)
1254 die("child finished with error '%d'\n", stat);
1255 exit(EXIT_SUCCESS);
1256 }
1257
1258
1259 void
1260 stty(void)
1261 {
1262 char cmd[_POSIX_ARG_MAX], **p, *q, *s;
1263 size_t n, siz;
1264
1265 if((n = strlen(stty_args)) > sizeof(cmd)-1)
1266 die("incorrect stty parameters\n");
1267 memcpy(cmd, stty_args, n);
1268 q = cmd + n;
1269 siz = sizeof(cmd) - n;
1270 for(p = opt_cmd; p && (s = *p); ++p) {
1271 if((n = strlen(s)) > siz-1)
1272 die("stty parameter length too long\n");
1273 *q++ = ' ';
1274 q = memcpy(q, s, n);
1275 q += n;
1276 siz-= n + 1;
1277 }
1278 *q = '\0';
1279 if (system(cmd) != 0)
1280 perror("Couldn't call stty");
1281 }
1282
1283 void
1284 ttynew(void) {
1285 int m, s;
1286 struct winsize w = {term.row, term.col, 0, 0};
1287
1288 if(opt_io) {
1289 term.mode |= MODE_PRINT;
1290 iofd = (!strcmp(opt_io, "-")) ?
1291 STDOUT_FILENO :
1292 open(opt_io, O_WRONLY | O_CREAT, 0666);
1293 if(iofd < 0) {
1294 fprintf(stderr, "Error opening %s:%s\n",
1295 opt_io, strerror(errno));
1296 }
1297 }
1298
1299 if (opt_line) {
1300 if((cmdfd = open(opt_line, O_RDWR)) < 0)
1301 die("open line failed: %s\n", strerror(errno));
1302 close(STDIN_FILENO);
1303 dup(cmdfd);
1304 stty();
1305 return;
1306 }
1307
1308 /* seems to work fine on linux, openbsd and freebsd */
1309 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1310 die("openpty failed: %s\n", strerror(errno));
1311
1312 switch(pid = fork()) {
1313 case -1:
1314 die("fork failed\n");
1315 break;
1316 case 0:
1317 close(iofd);
1318 setsid(); /* create a new process group */
1319 dup2(s, STDIN_FILENO);
1320 dup2(s, STDOUT_FILENO);
1321 dup2(s, STDERR_FILENO);
1322 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1323 die("ioctl TIOCSCTTY failed: %s\n", strerror(errno));
1324 close(s);
1325 close(m);
1326 execsh();
1327 break;
1328 default:
1329 close(s);
1330 cmdfd = m;
1331 signal(SIGCHLD, sigchld);
1332 break;
1333 }
1334 }
1335
1336 void
1337 ttyread(void) {
1338 static char buf[BUFSIZ];
1339 static int buflen = 0;
1340 char *ptr;
1341 char s[UTF_SIZ];
1342 int charsize; /* size of utf8 char in bytes */
1343 long unicodep;
1344 int ret;
1345
1346 /* append read bytes to unprocessed bytes */
1347 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1348 die("Couldn't read from shell: %s\n", strerror(errno));
1349
1350 /* process every complete utf8 char */
1351 buflen += ret;
1352 ptr = buf;
1353 while((charsize = utf8decode(ptr, &unicodep, buflen))) {
1354 utf8encode(unicodep, s, UTF_SIZ);
1355 tputc(s, charsize);
1356 ptr += charsize;
1357 buflen -= charsize;
1358 }
1359
1360 /* keep any uncomplete utf8 char for the next call */
1361 memmove(buf, ptr, buflen);
1362 }
1363
1364 void
1365 ttywrite(const char *s, size_t n) {
1366 if(xwrite(cmdfd, s, n) == -1)
1367 die("write error on tty: %s\n", strerror(errno));
1368 }
1369
1370 void
1371 ttysend(char *s, size_t n) {
1372 ttywrite(s, n);
1373 if(IS_SET(MODE_ECHO))
1374 techo(s, n);
1375 }
1376
1377 void
1378 ttyresize(void) {
1379 struct winsize w;
1380
1381 w.ws_row = term.row;
1382 w.ws_col = term.col;
1383 w.ws_xpixel = xw.tw;
1384 w.ws_ypixel = xw.th;
1385 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1386 fprintf(stderr, "Couldn't set window size: %s\n", strerror(errno));
1387 }
1388
1389 int
1390 tattrset(int attr) {
1391 int i, j;
1392
1393 for(i = 0; i < term.row-1; i++) {
1394 for(j = 0; j < term.col-1; j++) {
1395 if(term.line[i][j].mode & attr)
1396 return 1;
1397 }
1398 }
1399
1400 return 0;
1401 }
1402
1403 void
1404 tsetdirt(int top, int bot) {
1405 int i;
1406
1407 LIMIT(top, 0, term.row-1);
1408 LIMIT(bot, 0, term.row-1);
1409
1410 for(i = top; i <= bot; i++)
1411 term.dirty[i] = 1;
1412 }
1413
1414 void
1415 tsetdirtattr(int attr) {
1416 int i, j;
1417
1418 for(i = 0; i < term.row-1; i++) {
1419 for(j = 0; j < term.col-1; j++) {
1420 if(term.line[i][j].mode & attr) {
1421 tsetdirt(i, i);
1422 break;
1423 }
1424 }
1425 }
1426 }
1427
1428 void
1429 tfulldirt(void) {
1430 tsetdirt(0, term.row-1);
1431 }
1432
1433 void
1434 tcursor(int mode) {
1435 static TCursor c[2];
1436 bool alt = IS_SET(MODE_ALTSCREEN);
1437
1438 if(mode == CURSOR_SAVE) {
1439 c[alt] = term.c;
1440 } else if(mode == CURSOR_LOAD) {
1441 term.c = c[alt];
1442 tmoveto(c[alt].x, c[alt].y);
1443 }
1444 }
1445
1446 void
1447 treset(void) {
1448 uint i;
1449
1450 term.c = (TCursor){{
1451 .mode = ATTR_NULL,
1452 .fg = defaultfg,
1453 .bg = defaultbg
1454 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1455
1456 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1457 for(i = tabspaces; i < term.col; i += tabspaces)
1458 term.tabs[i] = 1;
1459 term.top = 0;
1460 term.bot = term.row - 1;
1461 term.mode = MODE_WRAP;
1462 memset(term.trantbl, CS_USA, sizeof(term.trantbl));
1463 term.charset = 0;
1464
1465 for(i = 0; i < 2; i++) {
1466 tmoveto(0, 0);
1467 tcursor(CURSOR_SAVE);
1468 tclearregion(0, 0, term.col-1, term.row-1);
1469 tswapscreen();
1470 }
1471 }
1472
1473 void
1474 tnew(int col, int row) {
1475 term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } };
1476 tresize(col, row);
1477 term.numlock = 1;
1478
1479 treset();
1480 }
1481
1482 void
1483 tswapscreen(void) {
1484 Line *tmp = term.line;
1485
1486 term.line = term.alt;
1487 term.alt = tmp;
1488 term.mode ^= MODE_ALTSCREEN;
1489 tfulldirt();
1490 }
1491
1492 void
1493 tscrolldown(int orig, int n) {
1494 int i;
1495 Line temp;
1496
1497 LIMIT(n, 0, term.bot-orig+1);
1498
1499 tsetdirt(orig, term.bot-n);
1500 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1501
1502 for(i = term.bot; i >= orig+n; i--) {
1503 temp = term.line[i];
1504 term.line[i] = term.line[i-n];
1505 term.line[i-n] = temp;
1506 }
1507
1508 selscroll(orig, n);
1509 }
1510
1511 void
1512 tscrollup(int orig, int n) {
1513 int i;
1514 Line temp;
1515
1516 LIMIT(n, 0, term.bot-orig+1);
1517
1518 tclearregion(0, orig, term.col-1, orig+n-1);
1519 tsetdirt(orig+n, term.bot);
1520
1521 for(i = orig; i <= term.bot-n; i++) {
1522 temp = term.line[i];
1523 term.line[i] = term.line[i+n];
1524 term.line[i+n] = temp;
1525 }
1526
1527 selscroll(orig, -n);
1528 }
1529
1530 void
1531 selscroll(int orig, int n) {
1532 if(sel.ob.x == -1)
1533 return;
1534
1535 if(BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
1536 if((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
1537 selclear(NULL);
1538 return;
1539 }
1540 if(sel.type == SEL_RECTANGULAR) {
1541 if(sel.ob.y < term.top)
1542 sel.ob.y = term.top;
1543 if(sel.oe.y > term.bot)
1544 sel.oe.y = term.bot;
1545 } else {
1546 if(sel.ob.y < term.top) {
1547 sel.ob.y = term.top;
1548 sel.ob.x = 0;
1549 }
1550 if(sel.oe.y > term.bot) {
1551 sel.oe.y = term.bot;
1552 sel.oe.x = term.col;
1553 }
1554 }
1555 selnormalize();
1556 }
1557 }
1558
1559 void
1560 tnewline(int first_col) {
1561 int y = term.c.y;
1562
1563 if(y == term.bot) {
1564 tscrollup(term.top, 1);
1565 } else {
1566 y++;
1567 }
1568 tmoveto(first_col ? 0 : term.c.x, y);
1569 }
1570
1571 void
1572 csiparse(void) {
1573 char *p = csiescseq.buf, *np;
1574 long int v;
1575
1576 csiescseq.narg = 0;
1577 if(*p == '?') {
1578 csiescseq.priv = 1;
1579 p++;
1580 }
1581
1582 csiescseq.buf[csiescseq.len] = '\0';
1583 while(p < csiescseq.buf+csiescseq.len) {
1584 np = NULL;
1585 v = strtol(p, &np, 10);
1586 if(np == p)
1587 v = 0;
1588 if(v == LONG_MAX || v == LONG_MIN)
1589 v = -1;
1590 csiescseq.arg[csiescseq.narg++] = v;
1591 p = np;
1592 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1593 break;
1594 p++;
1595 }
1596 csiescseq.mode[0] = *p++;
1597 csiescseq.mode[1] = (p < csiescseq.buf+csiescseq.len) ? *p : '\0';
1598 }
1599
1600 /* for absolute user moves, when decom is set */
1601 void
1602 tmoveato(int x, int y) {
1603 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1604 }
1605
1606 void
1607 tmoveto(int x, int y) {
1608 int miny, maxy;
1609
1610 if(term.c.state & CURSOR_ORIGIN) {
1611 miny = term.top;
1612 maxy = term.bot;
1613 } else {
1614 miny = 0;
1615 maxy = term.row - 1;
1616 }
1617 term.c.state &= ~CURSOR_WRAPNEXT;
1618 term.c.x = LIMIT(x, 0, term.col-1);
1619 term.c.y = LIMIT(y, miny, maxy);
1620 }
1621
1622 void
1623 tsetchar(char *c, Glyph *attr, int x, int y) {
1624 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1625 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1626 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1627 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1628 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1629 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1630 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1631 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1632 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1633 };
1634
1635 /*
1636 * The table is proudly stolen from rxvt.
1637 */
1638 if(term.trantbl[term.charset] == CS_GRAPHIC0) {
1639 if(BETWEEN(c[0], 0x41, 0x7e) && vt100_0[c[0] - 0x41]) {
1640 c = vt100_0[c[0] - 0x41];
1641 }
1642 }
1643
1644 if(term.line[y][x].mode & ATTR_WIDE) {
1645 if(x+1 < term.col) {
1646 term.line[y][x+1].c[0] = ' ';
1647 term.line[y][x+1].mode &= ~ATTR_WDUMMY;
1648 }
1649 } else if(term.line[y][x].mode & ATTR_WDUMMY) {
1650 term.line[y][x-1].c[0] = ' ';
1651 term.line[y][x-1].mode &= ~ATTR_WIDE;
1652 }
1653
1654 term.dirty[y] = 1;
1655 term.line[y][x] = *attr;
1656 memcpy(term.line[y][x].c, c, UTF_SIZ);
1657 }
1658
1659 void
1660 tclearregion(int x1, int y1, int x2, int y2) {
1661 int x, y, temp;
1662 Glyph *gp;
1663
1664 if(x1 > x2)
1665 temp = x1, x1 = x2, x2 = temp;
1666 if(y1 > y2)
1667 temp = y1, y1 = y2, y2 = temp;
1668
1669 LIMIT(x1, 0, term.col-1);
1670 LIMIT(x2, 0, term.col-1);
1671 LIMIT(y1, 0, term.row-1);
1672 LIMIT(y2, 0, term.row-1);
1673
1674 for(y = y1; y <= y2; y++) {
1675 term.dirty[y] = 1;
1676 for(x = x1; x <= x2; x++) {
1677 gp = &term.line[y][x];
1678 if(selected(x, y))
1679 selclear(NULL);
1680 gp->fg = term.c.attr.fg;
1681 gp->bg = term.c.attr.bg;
1682 gp->mode = 0;
1683 memcpy(gp->c, " ", 2);
1684 }
1685 }
1686 }
1687
1688 void
1689 tdeletechar(int n) {
1690 int dst, src, size;
1691 Glyph *line;
1692
1693 LIMIT(n, 0, term.col - term.c.x);
1694
1695 dst = term.c.x;
1696 src = term.c.x + n;
1697 size = term.col - src;
1698 line = term.line[term.c.y];
1699
1700 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1701 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1702 }
1703
1704 void
1705 tinsertblank(int n) {
1706 int dst, src, size;
1707 Glyph *line;
1708
1709 LIMIT(n, 0, term.col - term.c.x);
1710
1711 dst = term.c.x + n;
1712 src = term.c.x;
1713 size = term.col - dst;
1714 line = term.line[term.c.y];
1715
1716 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1717 tclearregion(src, term.c.y, dst - 1, term.c.y);
1718 }
1719
1720 void
1721 tinsertblankline(int n) {
1722 if(BETWEEN(term.c.y, term.top, term.bot))
1723 tscrolldown(term.c.y, n);
1724 }
1725
1726 void
1727 tdeleteline(int n) {
1728 if(BETWEEN(term.c.y, term.top, term.bot))
1729 tscrollup(term.c.y, n);
1730 }
1731
1732 int32_t
1733 tdefcolor(int *attr, int *npar, int l) {
1734 int32_t idx = -1;
1735 uint r, g, b;
1736
1737 switch (attr[*npar + 1]) {
1738 case 2: /* direct color in RGB space */
1739 if (*npar + 4 >= l) {
1740 fprintf(stderr,
1741 "erresc(38): Incorrect number of parameters (%d)\n",
1742 *npar);
1743 break;
1744 }
1745 r = attr[*npar + 2];
1746 g = attr[*npar + 3];
1747 b = attr[*npar + 4];
1748 *npar += 4;
1749 if(!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
1750 fprintf(stderr, "erresc: bad rgb color (%d,%d,%d)\n",
1751 r, g, b);
1752 else
1753 idx = TRUECOLOR(r, g, b);
1754 break;
1755 case 5: /* indexed color */
1756 if (*npar + 2 >= l) {
1757 fprintf(stderr,
1758 "erresc(38): Incorrect number of parameters (%d)\n",
1759 *npar);
1760 break;
1761 }
1762 *npar += 2;
1763 if(!BETWEEN(attr[*npar], 0, 255))
1764 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
1765 else
1766 idx = attr[*npar];
1767 break;
1768 case 0: /* implemented defined (only foreground) */
1769 case 1: /* transparent */
1770 case 3: /* direct color in CMY space */
1771 case 4: /* direct color in CMYK space */
1772 default:
1773 fprintf(stderr,
1774 "erresc(38): gfx attr %d unknown\n", attr[*npar]);
1775 break;
1776 }
1777
1778 return idx;
1779 }
1780
1781 void
1782 tsetattr(int *attr, int l) {
1783 int i;
1784 int32_t idx;
1785
1786 for(i = 0; i < l; i++) {
1787 switch(attr[i]) {
1788 case 0:
1789 term.c.attr.mode &= ~(
1790 ATTR_BOLD |
1791 ATTR_FAINT |
1792 ATTR_ITALIC |
1793 ATTR_UNDERLINE |
1794 ATTR_BLINK |
1795 ATTR_REVERSE |
1796 ATTR_INVISIBLE |
1797 ATTR_STRUCK );
1798 term.c.attr.fg = defaultfg;
1799 term.c.attr.bg = defaultbg;
1800 break;
1801 case 1:
1802 term.c.attr.mode |= ATTR_BOLD;
1803 break;
1804 case 2:
1805 term.c.attr.mode |= ATTR_FAINT;
1806 break;
1807 case 3:
1808 term.c.attr.mode |= ATTR_ITALIC;
1809 break;
1810 case 4:
1811 term.c.attr.mode |= ATTR_UNDERLINE;
1812 break;
1813 case 5: /* slow blink */
1814 /* FALLTHROUGH */
1815 case 6: /* rapid blink */
1816 term.c.attr.mode |= ATTR_BLINK;
1817 break;
1818 case 7:
1819 term.c.attr.mode |= ATTR_REVERSE;
1820 break;
1821 case 8:
1822 term.c.attr.mode |= ATTR_INVISIBLE;
1823 break;
1824 case 9:
1825 term.c.attr.mode |= ATTR_STRUCK;
1826 break;
1827 case 22:
1828 term.c.attr.mode &= ~(ATTR_BOLD | ATTR_FAINT);
1829 break;
1830 case 23:
1831 term.c.attr.mode &= ~ATTR_ITALIC;
1832 break;
1833 case 24:
1834 term.c.attr.mode &= ~ATTR_UNDERLINE;
1835 break;
1836 case 25:
1837 term.c.attr.mode &= ~ATTR_BLINK;
1838 break;
1839 case 27:
1840 term.c.attr.mode &= ~ATTR_REVERSE;
1841 break;
1842 case 28:
1843 term.c.attr.mode &= ~ATTR_INVISIBLE;
1844 break;
1845 case 29:
1846 term.c.attr.mode &= ~ATTR_STRUCK;
1847 break;
1848 case 38:
1849 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1850 term.c.attr.fg = idx;
1851 break;
1852 case 39:
1853 term.c.attr.fg = defaultfg;
1854 break;
1855 case 48:
1856 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1857 term.c.attr.bg = idx;
1858 break;
1859 case 49:
1860 term.c.attr.bg = defaultbg;
1861 break;
1862 default:
1863 if(BETWEEN(attr[i], 30, 37)) {
1864 term.c.attr.fg = attr[i] - 30;
1865 } else if(BETWEEN(attr[i], 40, 47)) {
1866 term.c.attr.bg = attr[i] - 40;
1867 } else if(BETWEEN(attr[i], 90, 97)) {
1868 term.c.attr.fg = attr[i] - 90 + 8;
1869 } else if(BETWEEN(attr[i], 100, 107)) {
1870 term.c.attr.bg = attr[i] - 100 + 8;
1871 } else {
1872 fprintf(stderr,
1873 "erresc(default): gfx attr %d unknown\n",
1874 attr[i]), csidump();
1875 }
1876 break;
1877 }
1878 }
1879 }
1880
1881 void
1882 tsetscroll(int t, int b) {
1883 int temp;
1884
1885 LIMIT(t, 0, term.row-1);
1886 LIMIT(b, 0, term.row-1);
1887 if(t > b) {
1888 temp = t;
1889 t = b;
1890 b = temp;
1891 }
1892 term.top = t;
1893 term.bot = b;
1894 }
1895
1896 void
1897 tsetmode(bool priv, bool set, int *args, int narg) {
1898 int *lim, mode;
1899 bool alt;
1900
1901 for(lim = args + narg; args < lim; ++args) {
1902 if(priv) {
1903 switch(*args) {
1904 case 1: /* DECCKM -- Cursor key */
1905 MODBIT(term.mode, set, MODE_APPCURSOR);
1906 break;
1907 case 5: /* DECSCNM -- Reverse video */
1908 mode = term.mode;
1909 MODBIT(term.mode, set, MODE_REVERSE);
1910 if(mode != term.mode)
1911 redraw();
1912 break;
1913 case 6: /* DECOM -- Origin */
1914 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1915 tmoveato(0, 0);
1916 break;
1917 case 7: /* DECAWM -- Auto wrap */
1918 MODBIT(term.mode, set, MODE_WRAP);
1919 break;
1920 case 0: /* Error (IGNORED) */
1921 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1922 case 3: /* DECCOLM -- Column (IGNORED) */
1923 case 4: /* DECSCLM -- Scroll (IGNORED) */
1924 case 8: /* DECARM -- Auto repeat (IGNORED) */
1925 case 18: /* DECPFF -- Printer feed (IGNORED) */
1926 case 19: /* DECPEX -- Printer extent (IGNORED) */
1927 case 42: /* DECNRCM -- National characters (IGNORED) */
1928 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1929 break;
1930 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1931 MODBIT(term.mode, !set, MODE_HIDE);
1932 break;
1933 case 9: /* X10 mouse compatibility mode */
1934 xsetpointermotion(0);
1935 MODBIT(term.mode, 0, MODE_MOUSE);
1936 MODBIT(term.mode, set, MODE_MOUSEX10);
1937 break;
1938 case 1000: /* 1000: report button press */
1939 xsetpointermotion(0);
1940 MODBIT(term.mode, 0, MODE_MOUSE);
1941 MODBIT(term.mode, set, MODE_MOUSEBTN);
1942 break;
1943 case 1002: /* 1002: report motion on button press */
1944 xsetpointermotion(0);
1945 MODBIT(term.mode, 0, MODE_MOUSE);
1946 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1947 break;
1948 case 1003: /* 1003: enable all mouse motions */
1949 xsetpointermotion(set);
1950 MODBIT(term.mode, 0, MODE_MOUSE);
1951 MODBIT(term.mode, set, MODE_MOUSEMANY);
1952 break;
1953 case 1004: /* 1004: send focus events to tty */
1954 MODBIT(term.mode, set, MODE_FOCUS);
1955 break;
1956 case 1006: /* 1006: extended reporting mode */
1957 MODBIT(term.mode, set, MODE_MOUSESGR);
1958 break;
1959 case 1034:
1960 MODBIT(term.mode, set, MODE_8BIT);
1961 break;
1962 case 1049: /* swap screen & set/restore cursor as xterm */
1963 if (!allowaltscreen)
1964 break;
1965 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1966 /* FALLTHROUGH */
1967 case 47: /* swap screen */
1968 case 1047:
1969 if (!allowaltscreen)
1970 break;
1971 alt = IS_SET(MODE_ALTSCREEN);
1972 if(alt) {
1973 tclearregion(0, 0, term.col-1,
1974 term.row-1);
1975 }
1976 if(set ^ alt) /* set is always 1 or 0 */
1977 tswapscreen();
1978 if(*args != 1049)
1979 break;
1980 /* FALLTHROUGH */
1981 case 1048:
1982 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1983 break;
1984 case 2004: /* 2004: bracketed paste mode */
1985 MODBIT(term.mode, set, MODE_BRCKTPASTE);
1986 break;
1987 /* Not implemented mouse modes. See comments there. */
1988 case 1001: /* mouse highlight mode; can hang the
1989 terminal by design when implemented. */
1990 case 1005: /* UTF-8 mouse mode; will confuse
1991 applications not supporting UTF-8
1992 and luit. */
1993 case 1015: /* urxvt mangled mouse mode; incompatible
1994 and can be mistaken for other control
1995 codes. */
1996 default:
1997 fprintf(stderr,
1998 "erresc: unknown private set/reset mode %d\n",
1999 *args);
2000 break;
2001 }
2002 } else {
2003 switch(*args) {
2004 case 0: /* Error (IGNORED) */
2005 break;
2006 case 2: /* KAM -- keyboard action */
2007 MODBIT(term.mode, set, MODE_KBDLOCK);
2008 break;
2009 case 4: /* IRM -- Insertion-replacement */
2010 MODBIT(term.mode, set, MODE_INSERT);
2011 break;
2012 case 12: /* SRM -- Send/Receive */
2013 MODBIT(term.mode, !set, MODE_ECHO);
2014 break;
2015 case 20: /* LNM -- Linefeed/new line */
2016 MODBIT(term.mode, set, MODE_CRLF);
2017 break;
2018 default:
2019 fprintf(stderr,
2020 "erresc: unknown set/reset mode %d\n",
2021 *args);
2022 break;
2023 }
2024 }
2025 }
2026 }
2027
2028 void
2029 csihandle(void) {
2030 char buf[40];
2031 int len;
2032
2033 switch(csiescseq.mode[0]) {
2034 default:
2035 unknown:
2036 fprintf(stderr, "erresc: unknown csi ");
2037 csidump();
2038 /* die(""); */
2039 break;
2040 case '@': /* ICH -- Insert <n> blank char */
2041 DEFAULT(csiescseq.arg[0], 1);
2042 tinsertblank(csiescseq.arg[0]);
2043 break;
2044 case 'A': /* CUU -- Cursor <n> Up */
2045 DEFAULT(csiescseq.arg[0], 1);
2046 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
2047 break;
2048 case 'B': /* CUD -- Cursor <n> Down */
2049 case 'e': /* VPR --Cursor <n> Down */
2050 DEFAULT(csiescseq.arg[0], 1);
2051 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
2052 break;
2053 case 'i': /* MC -- Media Copy */
2054 switch(csiescseq.arg[0]) {
2055 case 0:
2056 tdump();
2057 break;
2058 case 1:
2059 tdumpline(term.c.y);
2060 break;
2061 case 2:
2062 tdumpsel();
2063 break;
2064 case 4:
2065 term.mode &= ~MODE_PRINT;
2066 break;
2067 case 5:
2068 term.mode |= MODE_PRINT;
2069 break;
2070 }
2071 break;
2072 case 'c': /* DA -- Device Attributes */
2073 if(csiescseq.arg[0] == 0)
2074 ttywrite(vtiden, sizeof(vtiden) - 1);
2075 break;
2076 case 'C': /* CUF -- Cursor <n> Forward */
2077 case 'a': /* HPR -- Cursor <n> Forward */
2078 DEFAULT(csiescseq.arg[0], 1);
2079 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
2080 break;
2081 case 'D': /* CUB -- Cursor <n> Backward */
2082 DEFAULT(csiescseq.arg[0], 1);
2083 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
2084 break;
2085 case 'E': /* CNL -- Cursor <n> Down and first col */
2086 DEFAULT(csiescseq.arg[0], 1);
2087 tmoveto(0, term.c.y+csiescseq.arg[0]);
2088 break;
2089 case 'F': /* CPL -- Cursor <n> Up and first col */
2090 DEFAULT(csiescseq.arg[0], 1);
2091 tmoveto(0, term.c.y-csiescseq.arg[0]);
2092 break;
2093 case 'g': /* TBC -- Tabulation clear */
2094 switch(csiescseq.arg[0]) {
2095 case 0: /* clear current tab stop */
2096 term.tabs[term.c.x] = 0;
2097 break;
2098 case 3: /* clear all the tabs */
2099 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
2100 break;
2101 default:
2102 goto unknown;
2103 }
2104 break;
2105 case 'G': /* CHA -- Move to <col> */
2106 case '`': /* HPA */
2107 DEFAULT(csiescseq.arg[0], 1);
2108 tmoveto(csiescseq.arg[0]-1, term.c.y);
2109 break;
2110 case 'H': /* CUP -- Move to <row> <col> */
2111 case 'f': /* HVP */
2112 DEFAULT(csiescseq.arg[0], 1);
2113 DEFAULT(csiescseq.arg[1], 1);
2114 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
2115 break;
2116 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
2117 DEFAULT(csiescseq.arg[0], 1);
2118 tputtab(csiescseq.arg[0]);
2119 break;
2120 case 'J': /* ED -- Clear screen */
2121 selclear(NULL);
2122 switch(csiescseq.arg[0]) {
2123 case 0: /* below */
2124 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
2125 if(term.c.y < term.row-1) {
2126 tclearregion(0, term.c.y+1, term.col-1,
2127 term.row-1);
2128 }
2129 break;
2130 case 1: /* above */
2131 if(term.c.y > 1)
2132 tclearregion(0, 0, term.col-1, term.c.y-1);
2133 tclearregion(0, term.c.y, term.c.x, term.c.y);
2134 break;
2135 case 2: /* all */
2136 tclearregion(0, 0, term.col-1, term.row-1);
2137 break;
2138 default:
2139 goto unknown;
2140 }
2141 break;
2142 case 'K': /* EL -- Clear line */
2143 switch(csiescseq.arg[0]) {
2144 case 0: /* right */
2145 tclearregion(term.c.x, term.c.y, term.col-1,
2146 term.c.y);
2147 break;
2148 case 1: /* left */
2149 tclearregion(0, term.c.y, term.c.x, term.c.y);
2150 break;
2151 case 2: /* all */
2152 tclearregion(0, term.c.y, term.col-1, term.c.y);
2153 break;
2154 }
2155 break;
2156 case 'S': /* SU -- Scroll <n> line up */
2157 DEFAULT(csiescseq.arg[0], 1);
2158 tscrollup(term.top, csiescseq.arg[0]);
2159 break;
2160 case 'T': /* SD -- Scroll <n> line down */
2161 DEFAULT(csiescseq.arg[0], 1);
2162 tscrolldown(term.top, csiescseq.arg[0]);
2163 break;
2164 case 'L': /* IL -- Insert <n> blank lines */
2165 DEFAULT(csiescseq.arg[0], 1);
2166 tinsertblankline(csiescseq.arg[0]);
2167 break;
2168 case 'l': /* RM -- Reset Mode */
2169 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
2170 break;
2171 case 'M': /* DL -- Delete <n> lines */
2172 DEFAULT(csiescseq.arg[0], 1);
2173 tdeleteline(csiescseq.arg[0]);
2174 break;
2175 case 'X': /* ECH -- Erase <n> char */
2176 DEFAULT(csiescseq.arg[0], 1);
2177 tclearregion(term.c.x, term.c.y,
2178 term.c.x + csiescseq.arg[0] - 1, term.c.y);
2179 break;
2180 case 'P': /* DCH -- Delete <n> char */
2181 DEFAULT(csiescseq.arg[0], 1);
2182 tdeletechar(csiescseq.arg[0]);
2183 break;
2184 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
2185 DEFAULT(csiescseq.arg[0], 1);
2186 tputtab(-csiescseq.arg[0]);
2187 break;
2188 case 'd': /* VPA -- Move to <row> */
2189 DEFAULT(csiescseq.arg[0], 1);
2190 tmoveato(term.c.x, csiescseq.arg[0]-1);
2191 break;
2192 case 'h': /* SM -- Set terminal mode */
2193 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
2194 break;
2195 case 'm': /* SGR -- Terminal attribute (color) */
2196 tsetattr(csiescseq.arg, csiescseq.narg);
2197 break;
2198 case 'n': /* DSR – Device Status Report (cursor position) */
2199 if (csiescseq.arg[0] == 6) {
2200 len = snprintf(buf, sizeof(buf),"\033[%i;%iR",
2201 term.c.y+1, term.c.x+1);
2202 ttywrite(buf, len);
2203 }
2204 break;
2205 case 'r': /* DECSTBM -- Set Scrolling Region */
2206 if(csiescseq.priv) {
2207 goto unknown;
2208 } else {
2209 DEFAULT(csiescseq.arg[0], 1);
2210 DEFAULT(csiescseq.arg[1], term.row);
2211 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
2212 tmoveato(0, 0);
2213 }
2214 break;
2215 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
2216 tcursor(CURSOR_SAVE);
2217 break;
2218 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
2219 tcursor(CURSOR_LOAD);
2220 break;
2221 case ' ':
2222 switch (csiescseq.mode[1]) {
2223 case 'q': /* DECSCUSR -- Set Cursor Style */
2224 DEFAULT(csiescseq.arg[0], 1);
2225 if (!BETWEEN(csiescseq.arg[0], 0, 6)) {
2226 goto unknown;
2227 }
2228 xw.cursor = csiescseq.arg[0];
2229 break;
2230 default:
2231 goto unknown;
2232 }
2233 break;
2234 }
2235 }
2236
2237 void
2238 csidump(void) {
2239 int i;
2240 uint c;
2241
2242 printf("ESC[");
2243 for(i = 0; i < csiescseq.len; i++) {
2244 c = csiescseq.buf[i] & 0xff;
2245 if(isprint(c)) {
2246 putchar(c);
2247 } else if(c == '\n') {
2248 printf("(\\n)");
2249 } else if(c == '\r') {
2250 printf("(\\r)");
2251 } else if(c == 0x1b) {
2252 printf("(\\e)");
2253 } else {
2254 printf("(%02x)", c);
2255 }
2256 }
2257 putchar('\n');
2258 }
2259
2260 void
2261 csireset(void) {
2262 memset(&csiescseq, 0, sizeof(csiescseq));
2263 }
2264
2265 void
2266 strhandle(void) {
2267 char *p = NULL;
2268 int j, narg, par;
2269
2270 term.esc &= ~(ESC_STR_END|ESC_STR);
2271 strparse();
2272 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 Glyph *bp, *end;
2404
2405 bp = &term.line[n][0];
2406 end = &bp[MIN(tlinelen(n), term.col) - 1];
2407 if(bp != end || bp->c[0] != ' ') {
2408 for( ;bp <= end; ++bp)
2409 tprinter(bp->c, utf8len(bp->c));
2410 }
2411 tprinter("\n", 1);
2412 }
2413
2414 void
2415 tdump(void) {
2416 int i;
2417
2418 for(i = 0; i < term.row; ++i)
2419 tdumpline(i);
2420 }
2421
2422 void
2423 tputtab(int n) {
2424 uint x = term.c.x;
2425
2426 if(n > 0) {
2427 while(x < term.col && n--)
2428 for(++x; x < term.col && !term.tabs[x]; ++x)
2429 /* nothing */ ;
2430 } else if(n < 0) {
2431 while(x > 0 && n++)
2432 for(--x; x > 0 && !term.tabs[x]; --x)
2433 /* nothing */ ;
2434 }
2435 term.c.x = LIMIT(x, 0, term.col-1);
2436 }
2437
2438 void
2439 techo(char *buf, int len) {
2440 for(; len > 0; buf++, len--) {
2441 char c = *buf;
2442
2443 if(ISCONTROL((uchar) c)) { /* control code */
2444 if(c & 0x80) {
2445 c &= 0x7f;
2446 tputc("^", 1);
2447 tputc("[", 1);
2448 } else if(c != '\n' && c != '\r' && c != '\t') {
2449 c ^= 0x40;
2450 tputc("^", 1);
2451 }
2452 tputc(&c, 1);
2453 } else {
2454 break;
2455 }
2456 }
2457 if(len)
2458 tputc(buf, len);
2459 }
2460
2461 void
2462 tdeftran(char ascii) {
2463 static char cs[] = "0B";
2464 static int vcs[] = {CS_GRAPHIC0, CS_USA};
2465 char *p;
2466
2467 if((p = strchr(cs, ascii)) == NULL) {
2468 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2469 } else {
2470 term.trantbl[term.icharset] = vcs[p - cs];
2471 }
2472 }
2473
2474 void
2475 tdectest(char c) {
2476 static char E[UTF_SIZ] = "E";
2477 int x, y;
2478
2479 if(c == '8') { /* DEC screen alignment test. */
2480 for(x = 0; x < term.col; ++x) {
2481 for(y = 0; y < term.row; ++y)
2482 tsetchar(E, &term.c.attr, x, y);
2483 }
2484 }
2485 }
2486
2487 void
2488 tstrsequence(uchar c) {
2489 switch (c) {
2490 case 0x90: /* DCS -- Device Control String */
2491 c = 'P';
2492 break;
2493 case 0x9f: /* APC -- Application Program Command */
2494 c = '_';
2495 break;
2496 case 0x9e: /* PM -- Privacy Message */
2497 c = '^';
2498 break;
2499 case 0x9d: /* OSC -- Operating System Command */
2500 c = ']';
2501 break;
2502 }
2503 strreset();
2504 strescseq.type = c;
2505 term.esc |= ESC_STR;
2506 }
2507
2508 void
2509 tcontrolcode(uchar ascii) {
2510 static char question[UTF_SIZ] = "?";
2511
2512 switch(ascii) {
2513 case '\t': /* HT */
2514 tputtab(1);
2515 return;
2516 case '\b': /* BS */
2517 tmoveto(term.c.x-1, term.c.y);
2518 return;
2519 case '\r': /* CR */
2520 tmoveto(0, term.c.y);
2521 return;
2522 case '\f': /* LF */
2523 case '\v': /* VT */
2524 case '\n': /* LF */
2525 /* go to first col if the mode is set */
2526 tnewline(IS_SET(MODE_CRLF));
2527 return;
2528 case '\a': /* BEL */
2529 if(term.esc & ESC_STR_END) {
2530 /* backwards compatibility to xterm */
2531 strhandle();
2532 } else {
2533 if(!(xw.state & WIN_FOCUSED))
2534 xseturgency(1);
2535 if (bellvolume)
2536 XkbBell(xw.dpy, xw.win, bellvolume, (Atom)NULL);
2537 }
2538 break;
2539 case '\033': /* ESC */
2540 csireset();
2541 term.esc &= ~(ESC_CSI|ESC_ALTCHARSET|ESC_TEST);
2542 term.esc |= ESC_START;
2543 return;
2544 case '\016': /* SO (LS1 -- Locking shift 1) */
2545 case '\017': /* SI (LS0 -- Locking shift 0) */
2546 term.charset = 1 - (ascii - '\016');
2547 return;
2548 case '\032': /* SUB */
2549 tsetchar(question, &term.c.attr, term.c.x, term.c.y);
2550 case '\030': /* CAN */
2551 csireset();
2552 break;
2553 case '\005': /* ENQ (IGNORED) */
2554 case '\000': /* NUL (IGNORED) */
2555 case '\021': /* XON (IGNORED) */
2556 case '\023': /* XOFF (IGNORED) */
2557 case 0177: /* DEL (IGNORED) */
2558 return;
2559 case 0x84: /* TODO: IND */
2560 break;
2561 case 0x85: /* NEL -- Next line */
2562 tnewline(1); /* always go to first col */
2563 break;
2564 case 0x88: /* HTS -- Horizontal tab stop */
2565 term.tabs[term.c.x] = 1;
2566 break;
2567 case 0x8d: /* TODO: RI */
2568 case 0x8e: /* TODO: SS2 */
2569 case 0x8f: /* TODO: SS3 */
2570 case 0x98: /* TODO: SOS */
2571 break;
2572 case 0x9a: /* DECID -- Identify Terminal */
2573 ttywrite(vtiden, sizeof(vtiden) - 1);
2574 break;
2575 case 0x9b: /* TODO: CSI */
2576 case 0x9c: /* TODO: ST */
2577 break;
2578 case 0x90: /* DCS -- Device Control String */
2579 case 0x9f: /* APC -- Application Program Command */
2580 case 0x9e: /* PM -- Privacy Message */
2581 case 0x9d: /* OSC -- Operating System Command */
2582 tstrsequence(ascii);
2583 return;
2584 }
2585 /* only CAN, SUB, \a and C1 chars interrupt a sequence */
2586 term.esc &= ~(ESC_STR_END|ESC_STR);
2587 }
2588
2589 /*
2590 * returns 1 when the sequence is finished and it hasn't to read
2591 * more characters for this sequence, otherwise 0
2592 */
2593 int
2594 eschandle(uchar ascii) {
2595 switch(ascii) {
2596 case '[':
2597 term.esc |= ESC_CSI;
2598 return 0;
2599 case '#':
2600 term.esc |= ESC_TEST;
2601 return 0;
2602 case 'P': /* DCS -- Device Control String */
2603 case '_': /* APC -- Application Program Command */
2604 case '^': /* PM -- Privacy Message */
2605 case ']': /* OSC -- Operating System Command */
2606 case 'k': /* old title set compatibility */
2607 tstrsequence(ascii);
2608 return 0;
2609 case 'n': /* LS2 -- Locking shift 2 */
2610 case 'o': /* LS3 -- Locking shift 3 */
2611 term.charset = 2 + (ascii - 'n');
2612 break;
2613 case '(': /* GZD4 -- set primary charset G0 */
2614 case ')': /* G1D4 -- set secondary charset G1 */
2615 case '*': /* G2D4 -- set tertiary charset G2 */
2616 case '+': /* G3D4 -- set quaternary charset G3 */
2617 term.icharset = ascii - '(';
2618 term.esc |= ESC_ALTCHARSET;
2619 return 0;
2620 case 'D': /* IND -- Linefeed */
2621 if(term.c.y == term.bot) {
2622 tscrollup(term.top, 1);
2623 } else {
2624 tmoveto(term.c.x, term.c.y+1);
2625 }
2626 break;
2627 case 'E': /* NEL -- Next line */
2628 tnewline(1); /* always go to first col */
2629 break;
2630 case 'H': /* HTS -- Horizontal tab stop */
2631 term.tabs[term.c.x] = 1;
2632 break;
2633 case 'M': /* RI -- Reverse index */
2634 if(term.c.y == term.top) {
2635 tscrolldown(term.top, 1);
2636 } else {
2637 tmoveto(term.c.x, term.c.y-1);
2638 }
2639 break;
2640 case 'Z': /* DECID -- Identify Terminal */
2641 ttywrite(vtiden, sizeof(vtiden) - 1);
2642 break;
2643 case 'c': /* RIS -- Reset to inital state */
2644 treset();
2645 xresettitle();
2646 xloadcols();
2647 break;
2648 case '=': /* DECPAM -- Application keypad */
2649 term.mode |= MODE_APPKEYPAD;
2650 break;
2651 case '>': /* DECPNM -- Normal keypad */
2652 term.mode &= ~MODE_APPKEYPAD;
2653 break;
2654 case '7': /* DECSC -- Save Cursor */
2655 tcursor(CURSOR_SAVE);
2656 break;
2657 case '8': /* DECRC -- Restore Cursor */
2658 tcursor(CURSOR_LOAD);
2659 break;
2660 case '\\': /* ST -- String Terminator */
2661 if(term.esc & ESC_STR_END)
2662 strhandle();
2663 break;
2664 default:
2665 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2666 (uchar) ascii, isprint(ascii)? ascii:'.');
2667 break;
2668 }
2669 return 1;
2670 }
2671
2672 void
2673 tputc(char *c, int len) {
2674 uchar ascii;
2675 bool control;
2676 long unicodep;
2677 int width;
2678 Glyph *gp;
2679
2680 if(len == 1) {
2681 width = 1;
2682 unicodep = ascii = *c;
2683 } else {
2684 utf8decode(c, &unicodep, UTF_SIZ);
2685 if ((width = wcwidth(unicodep)) == -1) {
2686 c = "\357\277\275"; /* UTF_INVALID */
2687 width = 1;
2688 }
2689 ascii = unicodep;
2690 }
2691
2692 if(IS_SET(MODE_PRINT))
2693 tprinter(c, len);
2694 control = ISCONTROL(unicodep);
2695
2696 /*
2697 * STR sequence must be checked before anything else
2698 * because it uses all following characters until it
2699 * receives a ESC, a SUB, a ST or any other C1 control
2700 * character.
2701 */
2702 if(term.esc & ESC_STR) {
2703 if(len == 1 &&
2704 (ascii == '\a' || ascii == 030 ||
2705 ascii == 032 || ascii == 033 ||
2706 ISCONTROLC1(unicodep))) {
2707 term.esc &= ~(ESC_START|ESC_STR);
2708 term.esc |= ESC_STR_END;
2709 } else if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2710 memmove(&strescseq.buf[strescseq.len], c, len);
2711 strescseq.len += len;
2712 return;
2713 } else {
2714 /*
2715 * Here is a bug in terminals. If the user never sends
2716 * some code to stop the str or esc command, then st
2717 * will stop responding. But this is better than
2718 * silently failing with unknown characters. At least
2719 * then users will report back.
2720 *
2721 * In the case users ever get fixed, here is the code:
2722 */
2723 /*
2724 * term.esc = 0;
2725 * strhandle();
2726 */
2727 return;
2728 }
2729 }
2730
2731 /*
2732 * Actions of control codes must be performed as soon they arrive
2733 * because they can be embedded inside a control sequence, and
2734 * they must not cause conflicts with sequences.
2735 */
2736 if(control) {
2737 tcontrolcode(ascii);
2738 /*
2739 * control codes are not shown ever
2740 */
2741 return;
2742 } else if(term.esc & ESC_START) {
2743 if(term.esc & ESC_CSI) {
2744 csiescseq.buf[csiescseq.len++] = ascii;
2745 if(BETWEEN(ascii, 0x40, 0x7E)
2746 || csiescseq.len >= \
2747 sizeof(csiescseq.buf)-1) {
2748 term.esc = 0;
2749 csiparse();
2750 csihandle();
2751 }
2752 return;
2753 } else if(term.esc & ESC_ALTCHARSET) {
2754 tdeftran(ascii);
2755 } else if(term.esc & ESC_TEST) {
2756 tdectest(ascii);
2757 } else {
2758 if (!eschandle(ascii))
2759 return;
2760 /* sequence already finished */
2761 }
2762 term.esc = 0;
2763 /*
2764 * All characters which form part of a sequence are not
2765 * printed
2766 */
2767 return;
2768 }
2769 if(sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
2770 selclear(NULL);
2771
2772 gp = &term.line[term.c.y][term.c.x];
2773 if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2774 gp->mode |= ATTR_WRAP;
2775 tnewline(1);
2776 gp = &term.line[term.c.y][term.c.x];
2777 }
2778
2779 if(IS_SET(MODE_INSERT) && term.c.x+width < term.col)
2780 memmove(gp+width, gp, (term.col - term.c.x - width) * sizeof(Glyph));
2781
2782 if(term.c.x+width > term.col) {
2783 tnewline(1);
2784 gp = &term.line[term.c.y][term.c.x];
2785 }
2786
2787 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2788
2789 if(width == 2) {
2790 gp->mode |= ATTR_WIDE;
2791 if(term.c.x+1 < term.col) {
2792 gp[1].c[0] = '\0';
2793 gp[1].mode = ATTR_WDUMMY;
2794 }
2795 }
2796 if(term.c.x+width < term.col) {
2797 tmoveto(term.c.x+width, term.c.y);
2798 } else {
2799 term.c.state |= CURSOR_WRAPNEXT;
2800 }
2801 }
2802
2803 void
2804 tresize(int col, int row) {
2805 int i;
2806 int minrow = MIN(row, term.row);
2807 int mincol = MIN(col, term.col);
2808 bool *bp;
2809 TCursor c;
2810
2811 if(col < 1 || row < 1) {
2812 fprintf(stderr,
2813 "tresize: error resizing to %dx%d\n", col, row);
2814 return;
2815 }
2816
2817 /*
2818 * slide screen to keep cursor where we expect it -
2819 * tscrollup would work here, but we can optimize to
2820 * memmove because we're freeing the earlier lines
2821 */
2822 for(i = 0; i <= term.c.y - row; i++) {
2823 free(term.line[i]);
2824 free(term.alt[i]);
2825 }
2826 /* ensure that both src and dst are not NULL */
2827 if (i > 0) {
2828 memmove(term.line, term.line + i, row * sizeof(Line));
2829 memmove(term.alt, term.alt + i, row * sizeof(Line));
2830 }
2831 for(i += row; i < term.row; i++) {
2832 free(term.line[i]);
2833 free(term.alt[i]);
2834 }
2835
2836 /* resize to new height */
2837 term.line = xrealloc(term.line, row * sizeof(Line));
2838 term.alt = xrealloc(term.alt, row * sizeof(Line));
2839 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2840 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2841
2842 /* resize each row to new width, zero-pad if needed */
2843 for(i = 0; i < minrow; i++) {
2844 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2845 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2846 }
2847
2848 /* allocate any new rows */
2849 for(/* i == minrow */; i < row; i++) {
2850 term.line[i] = xmalloc(col * sizeof(Glyph));
2851 term.alt[i] = xmalloc(col * sizeof(Glyph));
2852 }
2853 if(col > term.col) {
2854 bp = term.tabs + term.col;
2855
2856 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2857 while(--bp > term.tabs && !*bp)
2858 /* nothing */ ;
2859 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2860 *bp = 1;
2861 }
2862 /* update terminal size */
2863 term.col = col;
2864 term.row = row;
2865 /* reset scrolling region */
2866 tsetscroll(0, row-1);
2867 /* make use of the LIMIT in tmoveto */
2868 tmoveto(term.c.x, term.c.y);
2869 /* Clearing both screens (it makes dirty all lines) */
2870 c = term.c;
2871 for(i = 0; i < 2; i++) {
2872 if(mincol < col && 0 < minrow) {
2873 tclearregion(mincol, 0, col - 1, minrow - 1);
2874 }
2875 if(0 < col && minrow < row) {
2876 tclearregion(0, minrow, col - 1, row - 1);
2877 }
2878 tswapscreen();
2879 tcursor(CURSOR_LOAD);
2880 }
2881 term.c = c;
2882 }
2883
2884 void
2885 xresize(int col, int row) {
2886 xw.tw = MAX(1, col * xw.cw);
2887 xw.th = MAX(1, row * xw.ch);
2888
2889 XFreePixmap(xw.dpy, xw.buf);
2890 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2891 DefaultDepth(xw.dpy, xw.scr));
2892 XftDrawChange(xw.draw, xw.buf);
2893 xclear(0, 0, xw.w, xw.h);
2894 }
2895
2896 ushort
2897 sixd_to_16bit(int x) {
2898 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2899 }
2900
2901 bool
2902 xloadcolor(int i, const char *name, Color *ncolor) {
2903 XRenderColor color = { .alpha = 0xffff };
2904
2905 if(!name) {
2906 if(BETWEEN(i, 16, 255)) { /* 256 color */
2907 if(i < 6*6*6+16) { /* same colors as xterm */
2908 color.red = sixd_to_16bit( ((i-16)/36)%6 );
2909 color.green = sixd_to_16bit( ((i-16)/6) %6 );
2910 color.blue = sixd_to_16bit( ((i-16)/1) %6 );
2911 } else { /* greyscale */
2912 color.red = 0x0808 + 0x0a0a * (i - (6*6*6+16));
2913 color.green = color.blue = color.red;
2914 }
2915 return XftColorAllocValue(xw.dpy, xw.vis,
2916 xw.cmap, &color, ncolor);
2917 } else
2918 name = colorname[i];
2919 }
2920 return XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, ncolor);
2921 }
2922
2923 void
2924 xloadcols(void) {
2925 int i;
2926 static bool loaded;
2927 Color *cp;
2928
2929 if(loaded) {
2930 for (cp = dc.col; cp < &dc.col[LEN(dc.col)]; ++cp)
2931 XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
2932 }
2933
2934 for(i = 0; i < LEN(dc.col); i++)
2935 if(!xloadcolor(i, NULL, &dc.col[i])) {
2936 if(colorname[i])
2937 die("Could not allocate color '%s'\n", colorname[i]);
2938 else
2939 die("Could not allocate color %d\n", i);
2940 }
2941 loaded = true;
2942 }
2943
2944 int
2945 xsetcolorname(int x, const char *name) {
2946 Color ncolor;
2947
2948 if(!BETWEEN(x, 0, LEN(dc.col)))
2949 return 1;
2950
2951
2952 if(!xloadcolor(x, name, &ncolor))
2953 return 1;
2954
2955 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2956 dc.col[x] = ncolor;
2957 return 0;
2958 }
2959
2960 void
2961 xtermclear(int col1, int row1, int col2, int row2) {
2962 XftDrawRect(xw.draw,
2963 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2964 borderpx + col1 * xw.cw,
2965 borderpx + row1 * xw.ch,
2966 (col2-col1+1) * xw.cw,
2967 (row2-row1+1) * xw.ch);
2968 }
2969
2970 /*
2971 * Absolute coordinates.
2972 */
2973 void
2974 xclear(int x1, int y1, int x2, int y2) {
2975 XftDrawRect(xw.draw,
2976 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2977 x1, y1, x2-x1, y2-y1);
2978 }
2979
2980 void
2981 xhints(void) {
2982 XClassHint class = {opt_class ? opt_class : termname, termname};
2983 XWMHints wm = {.flags = InputHint, .input = 1};
2984 XSizeHints *sizeh = NULL;
2985
2986 sizeh = XAllocSizeHints();
2987
2988 sizeh->flags = PSize | PResizeInc | PBaseSize;
2989 sizeh->height = xw.h;
2990 sizeh->width = xw.w;
2991 sizeh->height_inc = xw.ch;
2992 sizeh->width_inc = xw.cw;
2993 sizeh->base_height = 2 * borderpx;
2994 sizeh->base_width = 2 * borderpx;
2995 if(xw.isfixed == True) {
2996 sizeh->flags |= PMaxSize | PMinSize;
2997 sizeh->min_width = sizeh->max_width = xw.w;
2998 sizeh->min_height = sizeh->max_height = xw.h;
2999 }
3000 if(xw.gm & (XValue|YValue)) {
3001 sizeh->flags |= USPosition | PWinGravity;
3002 sizeh->x = xw.l;
3003 sizeh->y = xw.t;
3004 sizeh->win_gravity = xgeommasktogravity(xw.gm);
3005 }
3006
3007 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
3008 &class);
3009 XFree(sizeh);
3010 }
3011
3012 int
3013 xgeommasktogravity(int mask) {
3014 switch(mask & (XNegative|YNegative)) {
3015 case 0:
3016 return NorthWestGravity;
3017 case XNegative:
3018 return NorthEastGravity;
3019 case YNegative:
3020 return SouthWestGravity;
3021 }
3022 return SouthEastGravity;
3023 }
3024
3025 int
3026 xloadfont(Font *f, FcPattern *pattern) {
3027 FcPattern *match;
3028 FcResult result;
3029
3030 match = FcFontMatch(NULL, pattern, &result);
3031 if(!match)
3032 return 1;
3033
3034 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
3035 FcPatternDestroy(match);
3036 return 1;
3037 }
3038
3039 f->set = NULL;
3040 f->pattern = FcPatternDuplicate(pattern);
3041
3042 f->ascent = f->match->ascent;
3043 f->descent = f->match->descent;
3044 f->lbearing = 0;
3045 f->rbearing = f->match->max_advance_width;
3046
3047 f->height = f->ascent + f->descent;
3048 f->width = f->lbearing + f->rbearing;
3049
3050 return 0;
3051 }
3052
3053 void
3054 xloadfonts(char *fontstr, double fontsize) {
3055 FcPattern *pattern;
3056 FcResult r_sz, r_psz;
3057 double fontval;
3058 float ceilf(float);
3059
3060 if(fontstr[0] == '-') {
3061 pattern = XftXlfdParse(fontstr, False, False);
3062 } else {
3063 pattern = FcNameParse((FcChar8 *)fontstr);
3064 }
3065
3066 if(!pattern)
3067 die("st: can't open font %s\n", fontstr);
3068
3069 if(fontsize > 1) {
3070 FcPatternDel(pattern, FC_PIXEL_SIZE);
3071 FcPatternDel(pattern, FC_SIZE);
3072 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
3073 usedfontsize = fontsize;
3074 } else {
3075 r_psz = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
3076 r_sz = FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval);
3077 if(r_psz == FcResultMatch) {
3078 usedfontsize = fontval;
3079 } else if(r_sz == FcResultMatch) {
3080 usedfontsize = -1;
3081 } else {
3082 /*
3083 * Default font size is 12, if none given. This is to
3084 * have a known usedfontsize value.
3085 */
3086 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
3087 usedfontsize = 12;
3088 }
3089 defaultfontsize = usedfontsize;
3090 }
3091
3092 FcConfigSubstitute(0, pattern, FcMatchPattern);
3093 FcDefaultSubstitute(pattern);
3094
3095 if(xloadfont(&dc.font, pattern))
3096 die("st: can't open font %s\n", fontstr);
3097
3098 if(usedfontsize < 0) {
3099 FcPatternGetDouble(dc.font.match->pattern,
3100 FC_PIXEL_SIZE, 0, &fontval);
3101 usedfontsize = fontval;
3102 if(fontsize == 0)
3103 defaultfontsize = fontval;
3104 }
3105
3106 /* Setting character width and height. */
3107 xw.cw = ceilf(dc.font.width * cwscale);
3108 xw.ch = ceilf(dc.font.height * chscale);
3109
3110 FcPatternDel(pattern, FC_SLANT);
3111 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
3112 if(xloadfont(&dc.ifont, pattern))
3113 die("st: can't open font %s\n", fontstr);
3114
3115 FcPatternDel(pattern, FC_WEIGHT);
3116 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
3117 if(xloadfont(&dc.ibfont, pattern))
3118 die("st: can't open font %s\n", fontstr);
3119
3120 FcPatternDel(pattern, FC_SLANT);
3121 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
3122 if(xloadfont(&dc.bfont, pattern))
3123 die("st: can't open font %s\n", fontstr);
3124
3125 FcPatternDestroy(pattern);
3126 }
3127
3128 void
3129 xunloadfont(Font *f) {
3130 XftFontClose(xw.dpy, f->match);
3131 FcPatternDestroy(f->pattern);
3132 if(f->set)
3133 FcFontSetDestroy(f->set);
3134 }
3135
3136 void
3137 xunloadfonts(void) {
3138 /* Free the loaded fonts in the font cache. */
3139 while(frclen > 0)
3140 XftFontClose(xw.dpy, frc[--frclen].font);
3141
3142 xunloadfont(&dc.font);
3143 xunloadfont(&dc.bfont);
3144 xunloadfont(&dc.ifont);
3145 xunloadfont(&dc.ibfont);
3146 }
3147
3148 void
3149 xzoom(const Arg *arg) {
3150 Arg larg;
3151
3152 larg.i = usedfontsize + arg->i;
3153 xzoomabs(&larg);
3154 }
3155
3156 void
3157 xzoomabs(const Arg *arg) {
3158 xunloadfonts();
3159 xloadfonts(usedfont, arg->i);
3160 cresize(0, 0);
3161 redraw();
3162 xhints();
3163 }
3164
3165 void
3166 xzoomreset(const Arg *arg) {
3167 Arg larg;
3168
3169 if(defaultfontsize > 0) {
3170 larg.i = defaultfontsize;
3171 xzoomabs(&larg);
3172 }
3173 }
3174
3175 void
3176 xinit(void) {
3177 XGCValues gcvalues;
3178 Cursor cursor;
3179 Window parent;
3180 pid_t thispid = getpid();
3181
3182 if(!(xw.dpy = XOpenDisplay(NULL)))
3183 die("Can't open display\n");
3184 xw.scr = XDefaultScreen(xw.dpy);
3185 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
3186
3187 /* font */
3188 if(!FcInit())
3189 die("Could not init fontconfig.\n");
3190
3191 usedfont = (opt_font == NULL)? font : opt_font;
3192 xloadfonts(usedfont, 0);
3193
3194 /* colors */
3195 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
3196 xloadcols();
3197
3198 /* adjust fixed window geometry */
3199 xw.w = 2 * borderpx + term.col * xw.cw;
3200 xw.h = 2 * borderpx + term.row * xw.ch;
3201 if(xw.gm & XNegative)
3202 xw.l += DisplayWidth(xw.dpy, xw.scr) - xw.w - 2;
3203 if(xw.gm & YNegative)
3204 xw.t += DisplayWidth(xw.dpy, xw.scr) - xw.h - 2;
3205
3206 /* Events */
3207 xw.attrs.background_pixel = dc.col[defaultbg].pixel;
3208 xw.attrs.border_pixel = dc.col[defaultbg].pixel;
3209 xw.attrs.bit_gravity = NorthWestGravity;
3210 xw.attrs.event_mask = FocusChangeMask | KeyPressMask
3211 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
3212 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
3213 xw.attrs.colormap = xw.cmap;
3214
3215 if (!(opt_embed && (parent = strtol(opt_embed, NULL, 0))))
3216 parent = XRootWindow(xw.dpy, xw.scr);
3217 xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
3218 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
3219 xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
3220 | CWEventMask | CWColormap, &xw.attrs);
3221
3222 memset(&gcvalues, 0, sizeof(gcvalues));
3223 gcvalues.graphics_exposures = False;
3224 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
3225 &gcvalues);
3226 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
3227 DefaultDepth(xw.dpy, xw.scr));
3228 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
3229 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
3230
3231 /* Xft rendering context */
3232 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
3233
3234 /* input methods */
3235 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3236 XSetLocaleModifiers("@im=local");
3237 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3238 XSetLocaleModifiers("@im=");
3239 if((xw.xim = XOpenIM(xw.dpy,
3240 NULL, NULL, NULL)) == NULL) {
3241 die("XOpenIM failed. Could not open input"
3242 " device.\n");
3243 }
3244 }
3245 }
3246 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
3247 | XIMStatusNothing, XNClientWindow, xw.win,
3248 XNFocusWindow, xw.win, NULL);
3249 if(xw.xic == NULL)
3250 die("XCreateIC failed. Could not obtain input method.\n");
3251
3252 /* white cursor, black outline */
3253 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
3254 XDefineCursor(xw.dpy, xw.win, cursor);
3255 XRecolorCursor(xw.dpy, cursor,
3256 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
3257 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
3258
3259 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
3260 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
3261 xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
3262 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
3263
3264 xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
3265 XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
3266 PropModeReplace, (uchar *)&thispid, 1);
3267
3268 xresettitle();
3269 XMapWindow(xw.dpy, xw.win);
3270 xhints();
3271 XSync(xw.dpy, False);
3272 }
3273
3274 void
3275 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
3276 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
3277 width = charlen * xw.cw, xp, i;
3278 int frcflags, charexists;
3279 int u8fl, u8fblen, u8cblen, doesexist;
3280 char *u8c, *u8fs;
3281 long unicodep;
3282 Font *font = &dc.font;
3283 FcResult fcres;
3284 FcPattern *fcpattern, *fontpattern;
3285 FcFontSet *fcsets[] = { NULL };
3286 FcCharSet *fccharset;
3287 Color *fg, *bg, *temp, revfg, revbg, truefg, truebg;
3288 XRenderColor colfg, colbg;
3289 XRectangle r;
3290 int oneatatime;
3291
3292 frcflags = FRC_NORMAL;
3293
3294 if(base.mode & ATTR_ITALIC) {
3295 if(base.fg == defaultfg)
3296 base.fg = defaultitalic;
3297 font = &dc.ifont;
3298 frcflags = FRC_ITALIC;
3299 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
3300 if(base.fg == defaultfg)
3301 base.fg = defaultitalic;
3302 font = &dc.ibfont;
3303 frcflags = FRC_ITALICBOLD;
3304 } else if(base.mode & ATTR_UNDERLINE) {
3305 if(base.fg == defaultfg)
3306 base.fg = defaultunderline;
3307 }
3308
3309 if(IS_TRUECOL(base.fg)) {
3310 colfg.alpha = 0xffff;
3311 colfg.red = TRUERED(base.fg);
3312 colfg.green = TRUEGREEN(base.fg);
3313 colfg.blue = TRUEBLUE(base.fg);
3314 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
3315 fg = &truefg;
3316 } else {
3317 fg = &dc.col[base.fg];
3318 }
3319
3320 if(IS_TRUECOL(base.bg)) {
3321 colbg.alpha = 0xffff;
3322 colbg.green = TRUEGREEN(base.bg);
3323 colbg.red = TRUERED(base.bg);
3324 colbg.blue = TRUEBLUE(base.bg);
3325 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
3326 bg = &truebg;
3327 } else {
3328 bg = &dc.col[base.bg];
3329 }
3330
3331 if(base.mode & ATTR_BOLD) {
3332 /*
3333 * change basic system colors [0-7]
3334 * to bright system colors [8-15]
3335 */
3336 if(BETWEEN(base.fg, 0, 7) && !(base.mode & ATTR_FAINT))
3337 fg = &dc.col[base.fg + 8];
3338
3339 if(base.mode & ATTR_ITALIC) {
3340 font = &dc.ibfont;
3341 frcflags = FRC_ITALICBOLD;
3342 } else {
3343 font = &dc.bfont;
3344 frcflags = FRC_BOLD;
3345 }
3346 }
3347
3348 if(IS_SET(MODE_REVERSE)) {
3349 if(fg == &dc.col[defaultfg]) {
3350 fg = &dc.col[defaultbg];
3351 } else {
3352 colfg.red = ~fg->color.red;
3353 colfg.green = ~fg->color.green;
3354 colfg.blue = ~fg->color.blue;
3355 colfg.alpha = fg->color.alpha;
3356 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
3357 &revfg);
3358 fg = &revfg;
3359 }
3360
3361 if(bg == &dc.col[defaultbg]) {
3362 bg = &dc.col[defaultfg];
3363 } else {
3364 colbg.red = ~bg->color.red;
3365 colbg.green = ~bg->color.green;
3366 colbg.blue = ~bg->color.blue;
3367 colbg.alpha = bg->color.alpha;
3368 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
3369 &revbg);
3370 bg = &revbg;
3371 }
3372 }
3373
3374 if(base.mode & ATTR_REVERSE) {
3375 temp = fg;
3376 fg = bg;
3377 bg = temp;
3378 }
3379
3380 if(base.mode & ATTR_FAINT && !(base.mode & ATTR_BOLD)) {
3381 colfg.red = fg->color.red / 2;
3382 colfg.green = fg->color.green / 2;
3383 colfg.blue = fg->color.blue / 2;
3384 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
3385 fg = &revfg;
3386 }
3387
3388 if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
3389 fg = bg;
3390
3391 if(base.mode & ATTR_INVISIBLE)
3392 fg = bg;
3393
3394 /* Intelligent cleaning up of the borders. */
3395 if(x == 0) {
3396 xclear(0, (y == 0)? 0 : winy, borderpx,
3397 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
3398 }
3399 if(x + charlen >= term.col) {
3400 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
3401 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
3402 }
3403 if(y == 0)
3404 xclear(winx, 0, winx + width, borderpx);
3405 if(y == term.row-1)
3406 xclear(winx, winy + xw.ch, winx + width, xw.h);
3407
3408 /* Clean up the region we want to draw to. */
3409 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
3410
3411 /* Set the clip region because Xft is sometimes dirty. */
3412 r.x = 0;
3413 r.y = 0;
3414 r.height = xw.ch;
3415 r.width = width;
3416 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
3417
3418 for(xp = winx; bytelen > 0;) {
3419 /*
3420 * Search for the range in the to be printed string of glyphs
3421 * that are in the main font. Then print that range. If
3422 * some glyph is found that is not in the font, do the
3423 * fallback dance.
3424 */
3425 u8fs = s;
3426 u8fblen = 0;
3427 u8fl = 0;
3428 oneatatime = font->width != xw.cw;
3429 for(;;) {
3430 u8c = s;
3431 u8cblen = utf8decode(s, &unicodep, UTF_SIZ);
3432 s += u8cblen;
3433 bytelen -= u8cblen;
3434
3435 doesexist = XftCharExists(xw.dpy, font->match, unicodep);
3436 if(doesexist) {
3437 u8fl++;
3438 u8fblen += u8cblen;
3439 if(!oneatatime && bytelen > 0)
3440 continue;
3441 }
3442
3443 if(u8fl > 0) {
3444 XftDrawStringUtf8(xw.draw, fg,
3445 font->match, xp,
3446 winy + font->ascent,
3447 (FcChar8 *)u8fs,
3448 u8fblen);
3449 xp += xw.cw * u8fl;
3450 }
3451 break;
3452 }
3453 if(doesexist) {
3454 if(oneatatime)
3455 continue;
3456 break;
3457 }
3458
3459 /* Search the font cache. */
3460 for(i = 0; i < frclen; i++) {
3461 charexists = XftCharExists(xw.dpy, frc[i].font, unicodep);
3462 /* Everything correct. */
3463 if(charexists && frc[i].flags == frcflags)
3464 break;
3465 /* We got a default font for a not found glyph. */
3466 if(!charexists && frc[i].flags == frcflags \
3467 && frc[i].unicodep == unicodep) {
3468 break;
3469 }
3470 }
3471
3472 /* Nothing was found. */
3473 if(i >= frclen) {
3474 if(!font->set)
3475 font->set = FcFontSort(0, font->pattern,
3476 FcTrue, 0, &fcres);
3477 fcsets[0] = font->set;
3478
3479 /*
3480 * Nothing was found in the cache. Now use
3481 * some dozen of Fontconfig calls to get the
3482 * font for one single character.
3483 *
3484 * Xft and fontconfig are design failures.
3485 */
3486 fcpattern = FcPatternDuplicate(font->pattern);
3487 fccharset = FcCharSetCreate();
3488
3489 FcCharSetAddChar(fccharset, unicodep);
3490 FcPatternAddCharSet(fcpattern, FC_CHARSET,
3491 fccharset);
3492 FcPatternAddBool(fcpattern, FC_SCALABLE,
3493 FcTrue);
3494
3495 FcConfigSubstitute(0, fcpattern,
3496 FcMatchPattern);
3497 FcDefaultSubstitute(fcpattern);
3498
3499 fontpattern = FcFontSetMatch(0, fcsets, 1,
3500 fcpattern, &fcres);
3501
3502 /*
3503 * Overwrite or create the new cache entry.
3504 */
3505 if(frclen >= LEN(frc)) {
3506 frclen = LEN(frc) - 1;
3507 XftFontClose(xw.dpy, frc[frclen].font);
3508 frc[frclen].unicodep = 0;
3509 }
3510
3511 frc[frclen].font = XftFontOpenPattern(xw.dpy,
3512 fontpattern);
3513 frc[frclen].flags = frcflags;
3514 frc[frclen].unicodep = unicodep;
3515
3516 i = frclen;
3517 frclen++;
3518
3519 FcPatternDestroy(fcpattern);
3520 FcCharSetDestroy(fccharset);
3521 }
3522
3523 XftDrawStringUtf8(xw.draw, fg, frc[i].font,
3524 xp, winy + frc[i].font->ascent,
3525 (FcChar8 *)u8c, u8cblen);
3526
3527 xp += xw.cw * wcwidth(unicodep);
3528 }
3529
3530 /*
3531 * This is how the loop above actually should be. Why does the
3532 * application have to care about font details?
3533 *
3534 * I have to repeat: Xft and Fontconfig are design failures.
3535 */
3536 /*
3537 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
3538 winy + font->ascent, (FcChar8 *)s, bytelen);
3539 */
3540
3541 if(base.mode & ATTR_UNDERLINE) {
3542 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
3543 width, 1);
3544 }
3545
3546 if(base.mode & ATTR_STRUCK) {
3547 XftDrawRect(xw.draw, fg, winx, winy + 2 * font->ascent / 3,
3548 width, 1);
3549 }
3550
3551 /* Reset clip to none. */
3552 XftDrawSetClip(xw.draw, 0);
3553 }
3554
3555 void
3556 xdrawcursor(void) {
3557 static int oldx = 0, oldy = 0;
3558 int sl, width, curx;
3559 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
3560
3561 LIMIT(oldx, 0, term.col-1);
3562 LIMIT(oldy, 0, term.row-1);
3563
3564 curx = term.c.x;
3565
3566 /* adjust position if in dummy */
3567 if(term.line[oldy][oldx].mode & ATTR_WDUMMY)
3568 oldx--;
3569 if(term.line[term.c.y][curx].mode & ATTR_WDUMMY)
3570 curx--;
3571
3572 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
3573
3574 /* remove the old cursor */
3575 sl = utf8len(term.line[oldy][oldx].c);
3576 width = (term.line[oldy][oldx].mode & ATTR_WIDE)? 2 : 1;
3577 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
3578 oldy, width, sl);
3579
3580 if(IS_SET(MODE_HIDE))
3581 return;
3582
3583 /* draw the new one */
3584 if(xw.state & WIN_FOCUSED) {
3585 switch (xw.cursor) {
3586 case 0: /* Blinking Block */
3587 case 1: /* Blinking Block (Default) */
3588 case 2: /* Steady Block */
3589 if(IS_SET(MODE_REVERSE)) {
3590 g.mode |= ATTR_REVERSE;
3591 g.fg = defaultcs;
3592 g.bg = defaultfg;
3593 }
3594
3595 sl = utf8len(g.c);
3596 width = (term.line[term.c.y][curx].mode & ATTR_WIDE)\
3597 ? 2 : 1;
3598 xdraws(g.c, g, term.c.x, term.c.y, width, sl);
3599 break;
3600 case 3: /* Blinking Underline */
3601 case 4: /* Steady Underline */
3602 XftDrawRect(xw.draw, &dc.col[defaultcs],
3603 borderpx + curx * xw.cw,
3604 borderpx + (term.c.y + 1) * xw.ch - cursorthickness,
3605 xw.cw, cursorthickness);
3606 break;
3607 case 5: /* Blinking bar */
3608 case 6: /* Steady bar */
3609 XftDrawRect(xw.draw, &dc.col[defaultcs],
3610 borderpx + curx * xw.cw,
3611 borderpx + term.c.y * xw.ch,
3612 cursorthickness, xw.ch);
3613 break;
3614 }
3615 } else {
3616 XftDrawRect(xw.draw, &dc.col[defaultcs],
3617 borderpx + curx * xw.cw,
3618 borderpx + term.c.y * xw.ch,
3619 xw.cw - 1, 1);
3620 XftDrawRect(xw.draw, &dc.col[defaultcs],
3621 borderpx + curx * xw.cw,
3622 borderpx + term.c.y * xw.ch,
3623 1, xw.ch - 1);
3624 XftDrawRect(xw.draw, &dc.col[defaultcs],
3625 borderpx + (curx + 1) * xw.cw - 1,
3626 borderpx + term.c.y * xw.ch,
3627 1, xw.ch - 1);
3628 XftDrawRect(xw.draw, &dc.col[defaultcs],
3629 borderpx + curx * xw.cw,
3630 borderpx + (term.c.y + 1) * xw.ch - 1,
3631 xw.cw, 1);
3632 }
3633 oldx = curx, oldy = term.c.y;
3634 }
3635
3636
3637 void
3638 xsettitle(char *p) {
3639 XTextProperty prop;
3640
3641 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3642 &prop);
3643 XSetWMName(xw.dpy, xw.win, &prop);
3644 XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
3645 XFree(prop.value);
3646 }
3647
3648 void
3649 xresettitle(void) {
3650 xsettitle(opt_title ? opt_title : "st");
3651 }
3652
3653 void
3654 redraw(void) {
3655 tfulldirt();
3656 draw();
3657 }
3658
3659 void
3660 draw(void) {
3661 drawregion(0, 0, term.col, term.row);
3662 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3663 xw.h, 0, 0);
3664 XSetForeground(xw.dpy, dc.gc,
3665 dc.col[IS_SET(MODE_REVERSE)?
3666 defaultfg : defaultbg].pixel);
3667 }
3668
3669 void
3670 drawregion(int x1, int y1, int x2, int y2) {
3671 int ic, ib, x, y, ox, sl;
3672 Glyph base, new;
3673 char buf[DRAW_BUF_SIZ];
3674 bool ena_sel = sel.ob.x != -1 && sel.alt == IS_SET(MODE_ALTSCREEN);
3675 long unicodep;
3676
3677 if(!(xw.state & WIN_VISIBLE))
3678 return;
3679
3680 for(y = y1; y < y2; y++) {
3681 if(!term.dirty[y])
3682 continue;
3683
3684 xtermclear(0, y, term.col, y);
3685 term.dirty[y] = 0;
3686 base = term.line[y][0];
3687 ic = ib = ox = 0;
3688 for(x = x1; x < x2; x++) {
3689 new = term.line[y][x];
3690 if(new.mode == ATTR_WDUMMY)
3691 continue;
3692 if(ena_sel && selected(x, y))
3693 new.mode ^= ATTR_REVERSE;
3694 if(ib > 0 && (ATTRCMP(base, new)
3695 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3696 xdraws(buf, base, ox, y, ic, ib);
3697 ic = ib = 0;
3698 }
3699 if(ib == 0) {
3700 ox = x;
3701 base = new;
3702 }
3703
3704 sl = utf8decode(new.c, &unicodep, UTF_SIZ);
3705 memcpy(buf+ib, new.c, sl);
3706 ib += sl;
3707 ic += (new.mode & ATTR_WIDE)? 2 : 1;
3708 }
3709 if(ib > 0)
3710 xdraws(buf, base, ox, y, ic, ib);
3711 }
3712 xdrawcursor();
3713 }
3714
3715 void
3716 expose(XEvent *ev) {
3717 redraw();
3718 }
3719
3720 void
3721 visibility(XEvent *ev) {
3722 XVisibilityEvent *e = &ev->xvisibility;
3723
3724 MODBIT(xw.state, e->state != VisibilityFullyObscured, WIN_VISIBLE);
3725 }
3726
3727 void
3728 unmap(XEvent *ev) {
3729 xw.state &= ~WIN_VISIBLE;
3730 }
3731
3732 void
3733 xsetpointermotion(int set) {
3734 MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
3735 XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
3736 }
3737
3738 void
3739 xseturgency(int add) {
3740 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3741
3742 MODBIT(h->flags, add, XUrgencyHint);
3743 XSetWMHints(xw.dpy, xw.win, h);
3744 XFree(h);
3745 }
3746
3747 void
3748 focus(XEvent *ev) {
3749 XFocusChangeEvent *e = &ev->xfocus;
3750
3751 if(e->mode == NotifyGrab)
3752 return;
3753
3754 if(ev->type == FocusIn) {
3755 XSetICFocus(xw.xic);
3756 xw.state |= WIN_FOCUSED;
3757 xseturgency(0);
3758 if(IS_SET(MODE_FOCUS))
3759 ttywrite("\033[I", 3);
3760 } else {
3761 XUnsetICFocus(xw.xic);
3762 xw.state &= ~WIN_FOCUSED;
3763 if(IS_SET(MODE_FOCUS))
3764 ttywrite("\033[O", 3);
3765 }
3766 }
3767
3768 bool
3769 match(uint mask, uint state) {
3770 return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
3771 }
3772
3773 void
3774 numlock(const Arg *dummy) {
3775 term.numlock ^= 1;
3776 }
3777
3778 char*
3779 kmap(KeySym k, uint state) {
3780 Key *kp;
3781 int i;
3782
3783 /* Check for mapped keys out of X11 function keys. */
3784 for(i = 0; i < LEN(mappedkeys); i++) {
3785 if(mappedkeys[i] == k)
3786 break;
3787 }
3788 if(i == LEN(mappedkeys)) {
3789 if((k & 0xFFFF) < 0xFD00)
3790 return NULL;
3791 }
3792
3793 for(kp = key; kp < key + LEN(key); kp++) {
3794 if(kp->k != k)
3795 continue;
3796
3797 if(!match(kp->mask, state))
3798 continue;
3799
3800 if(IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
3801 continue;
3802 if(term.numlock && kp->appkey == 2)
3803 continue;
3804
3805 if(IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
3806 continue;
3807
3808 if(IS_SET(MODE_CRLF) ? kp->crlf < 0 : kp->crlf > 0)
3809 continue;
3810
3811 return kp->s;
3812 }
3813
3814 return NULL;
3815 }
3816
3817 void
3818 kpress(XEvent *ev) {
3819 XKeyEvent *e = &ev->xkey;
3820 KeySym ksym;
3821 char buf[32], *customkey;
3822 int len;
3823 long c;
3824 Status status;
3825 Shortcut *bp;
3826
3827 if(IS_SET(MODE_KBDLOCK))
3828 return;
3829
3830 len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
3831 /* 1. shortcuts */
3832 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3833 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3834 bp->func(&(bp->arg));
3835 return;
3836 }
3837 }
3838
3839 /* 2. custom keys from config.h */
3840 if((customkey = kmap(ksym, e->state))) {
3841 ttysend(customkey, strlen(customkey));
3842 return;
3843 }
3844
3845 /* 3. composed string from input method */
3846 if(len == 0)
3847 return;
3848 if(len == 1 && e->state & Mod1Mask) {
3849 if(IS_SET(MODE_8BIT)) {
3850 if(*buf < 0177) {
3851 c = *buf | 0x80;
3852 len = utf8encode(c, buf, UTF_SIZ);
3853 }
3854 } else {
3855 buf[1] = buf[0];
3856 buf[0] = '\033';
3857 len = 2;
3858 }
3859 }
3860 ttysend(buf, len);
3861 }
3862
3863
3864 void
3865 cmessage(XEvent *e) {
3866 /*
3867 * See xembed specs
3868 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3869 */
3870 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3871 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3872 xw.state |= WIN_FOCUSED;
3873 xseturgency(0);
3874 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3875 xw.state &= ~WIN_FOCUSED;
3876 }
3877 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3878 /* Send SIGHUP to shell */
3879 kill(pid, SIGHUP);
3880 exit(EXIT_SUCCESS);
3881 }
3882 }
3883
3884 void
3885 cresize(int width, int height) {
3886 int col, row;
3887
3888 if(width != 0)
3889 xw.w = width;
3890 if(height != 0)
3891 xw.h = height;
3892
3893 col = (xw.w - 2 * borderpx) / xw.cw;
3894 row = (xw.h - 2 * borderpx) / xw.ch;
3895
3896 tresize(col, row);
3897 xresize(col, row);
3898 ttyresize();
3899 }
3900
3901 void
3902 resize(XEvent *e) {
3903 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3904 return;
3905
3906 cresize(e->xconfigure.width, e->xconfigure.height);
3907 }
3908
3909 void
3910 run(void) {
3911 XEvent ev;
3912 int w = xw.w, h = xw.h;
3913 fd_set rfd;
3914 int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3915 struct timespec drawtimeout, *tv = NULL, now, last, lastblink;
3916 long deltatime;
3917
3918 /* Waiting for window mapping */
3919 do {
3920 XNextEvent(xw.dpy, &ev);
3921 if(ev.type == ConfigureNotify) {
3922 w = ev.xconfigure.width;
3923 h = ev.xconfigure.height;
3924 }
3925 } while(ev.type != MapNotify);
3926
3927 ttynew();
3928 cresize(w, h);
3929
3930 clock_gettime(CLOCK_MONOTONIC, &last);
3931 lastblink = last;
3932
3933 for(xev = actionfps;;) {
3934 FD_ZERO(&rfd);
3935 FD_SET(cmdfd, &rfd);
3936 FD_SET(xfd, &rfd);
3937
3938 if(pselect(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv, NULL) < 0) {
3939 if(errno == EINTR)
3940 continue;
3941 die("select failed: %s\n", strerror(errno));
3942 }
3943 if(FD_ISSET(cmdfd, &rfd)) {
3944 ttyread();
3945 if(blinktimeout) {
3946 blinkset = tattrset(ATTR_BLINK);
3947 if(!blinkset)
3948 MODBIT(term.mode, 0, MODE_BLINK);
3949 }
3950 }
3951
3952 if(FD_ISSET(xfd, &rfd))
3953 xev = actionfps;
3954
3955 clock_gettime(CLOCK_MONOTONIC, &now);
3956 drawtimeout.tv_sec = 0;
3957 drawtimeout.tv_nsec = (1000 * 1E6)/ xfps;
3958 tv = &drawtimeout;
3959
3960 dodraw = 0;
3961 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
3962 tsetdirtattr(ATTR_BLINK);
3963 term.mode ^= MODE_BLINK;
3964 lastblink = now;
3965 dodraw = 1;
3966 }
3967 deltatime = TIMEDIFF(now, last);
3968 if(deltatime > 1000 / (xev ? xfps : actionfps)) {
3969 dodraw = 1;
3970 last = now;
3971 }
3972
3973 if(dodraw) {
3974 while(XPending(xw.dpy)) {
3975 XNextEvent(xw.dpy, &ev);
3976 if(XFilterEvent(&ev, None))
3977 continue;
3978 if(handler[ev.type])
3979 (handler[ev.type])(&ev);
3980 }
3981
3982 draw();
3983 XFlush(xw.dpy);
3984
3985 if(xev && !FD_ISSET(xfd, &rfd))
3986 xev--;
3987 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
3988 if(blinkset) {
3989 if(TIMEDIFF(now, lastblink) \
3990 > blinktimeout) {
3991 drawtimeout.tv_nsec = 1000;
3992 } else {
3993 drawtimeout.tv_nsec = (1E6 * \
3994 (blinktimeout - \
3995 TIMEDIFF(now,
3996 lastblink)));
3997 }
3998 drawtimeout.tv_sec = \
3999 drawtimeout.tv_nsec / 1E9;
4000 drawtimeout.tv_nsec %= (long)1E9;
4001 } else {
4002 tv = NULL;
4003 }
4004 }
4005 }
4006 }
4007 }
4008
4009 void
4010 usage(void) {
4011 die("%s " VERSION " (c) 2010-2015 st engineers\n"
4012 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]\n"
4013 " [-i] [-t title] [-w windowid] [-e command ...] [command ...]\n"
4014 " st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]\n"
4015 " [-i] [-t title] [-w windowid] [-l line] [stty_args ...]\n",
4016 argv0);
4017 }
4018
4019 int
4020 main(int argc, char *argv[]) {
4021 uint cols = 80, rows = 24;
4022
4023 xw.l = xw.t = 0;
4024 xw.isfixed = False;
4025 xw.cursor = 0;
4026
4027 ARGBEGIN {
4028 case 'a':
4029 allowaltscreen = false;
4030 break;
4031 case 'c':
4032 opt_class = EARGF(usage());
4033 break;
4034 case 'e':
4035 if(argc > 1)
4036 --argc, ++argv;
4037 goto run;
4038 case 'f':
4039 opt_font = EARGF(usage());
4040 break;
4041 case 'g':
4042 xw.gm = XParseGeometry(EARGF(usage()),
4043 &xw.l, &xw.t, &cols, &rows);
4044 break;
4045 case 'i':
4046 xw.isfixed = True;
4047 break;
4048 case 'o':
4049 opt_io = EARGF(usage());
4050 break;
4051 case 'l':
4052 opt_line = EARGF(usage());
4053 break;
4054 case 't':
4055 opt_title = EARGF(usage());
4056 break;
4057 case 'w':
4058 opt_embed = EARGF(usage());
4059 break;
4060 case 'v':
4061 default:
4062 usage();
4063 } ARGEND;
4064
4065 run:
4066 if(argc > 0) {
4067 /* eat all remaining arguments */
4068 opt_cmd = argv;
4069 if(!opt_title && !opt_line)
4070 opt_title = basename(xstrdup(argv[0]));
4071 }
4072 setlocale(LC_CTYPE, "");
4073 XSetLocaleModifiers("");
4074 tnew(MAX(cols, 1), MAX(rows, 1));
4075 xinit();
4076 selinit();
4077 run();
4078
4079 return 0;
4080 }
4081