Xinqi Bao's Git

projects / st.git / blob
summary | log | commit | diff | tree
history | raw | HEAD
Fix segmentation fault in strhandle()
[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 system(cmd);
1280 }
1281
1282 void
1283 ttynew(void) {
1284 int m, s;
1285 struct winsize w = {term.row, term.col, 0, 0};
1286
1287 if(opt_io) {
1288 term.mode |= MODE_PRINT;
1289 iofd = (!strcmp(opt_io, "-")) ?
1290 STDOUT_FILENO :
1291 open(opt_io, O_WRONLY | O_CREAT, 0666);
1292 if(iofd < 0) {
1293 fprintf(stderr, "Error opening %s:%s\n",
1294 opt_io, strerror(errno));
1295 }
1296 }
1297
1298 if (opt_line) {
1299 if((cmdfd = open(opt_line, O_RDWR)) < 0)
1300 die("open line failed: %s\n", strerror(errno));
1301 close(STDIN_FILENO);
1302 dup(cmdfd);
1303 stty();
1304 return;
1305 }
1306
1307 /* seems to work fine on linux, openbsd and freebsd */
1308 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1309 die("openpty failed: %s\n", strerror(errno));
1310
1311 switch(pid = fork()) {
1312 case -1:
1313 die("fork failed\n");
1314 break;
1315 case 0:
1316 close(iofd);
1317 setsid(); /* create a new process group */
1318 dup2(s, STDIN_FILENO);
1319 dup2(s, STDOUT_FILENO);
1320 dup2(s, STDERR_FILENO);
1321 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1322 die("ioctl TIOCSCTTY failed: %s\n", strerror(errno));
1323 close(s);
1324 close(m);
1325 execsh();
1326 break;
1327 default:
1328 close(s);
1329 cmdfd = m;
1330 signal(SIGCHLD, sigchld);
1331 break;
1332 }
1333 }
1334
1335 void
1336 ttyread(void) {
1337 static char buf[BUFSIZ];
1338 static int buflen = 0;
1339 char *ptr;
1340 char s[UTF_SIZ];
1341 int charsize; /* size of utf8 char in bytes */
1342 long unicodep;
1343 int ret;
1344
1345 /* append read bytes to unprocessed bytes */
1346 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1347 die("Couldn't read from shell: %s\n", strerror(errno));
1348
1349 /* process every complete utf8 char */
1350 buflen += ret;
1351 ptr = buf;
1352 while((charsize = utf8decode(ptr, &unicodep, buflen))) {
1353 utf8encode(unicodep, s, UTF_SIZ);
1354 tputc(s, charsize);
1355 ptr += charsize;
1356 buflen -= charsize;
1357 }
1358
1359 /* keep any uncomplete utf8 char for the next call */
1360 memmove(buf, ptr, buflen);
1361 }
1362
1363 void
1364 ttywrite(const char *s, size_t n) {
1365 if(xwrite(cmdfd, s, n) == -1)
1366 die("write error on tty: %s\n", strerror(errno));
1367 }
1368
1369 void
1370 ttysend(char *s, size_t n) {
1371 ttywrite(s, n);
1372 if(IS_SET(MODE_ECHO))
1373 techo(s, n);
1374 }
1375
1376 void
1377 ttyresize(void) {
1378 struct winsize w;
1379
1380 w.ws_row = term.row;
1381 w.ws_col = term.col;
1382 w.ws_xpixel = xw.tw;
1383 w.ws_ypixel = xw.th;
1384 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1385 fprintf(stderr, "Couldn't set window size: %s\n", strerror(errno));
1386 }
1387
1388 int
1389 tattrset(int attr) {
1390 int i, j;
1391
1392 for(i = 0; i < term.row-1; i++) {
1393 for(j = 0; j < term.col-1; j++) {
1394 if(term.line[i][j].mode & attr)
1395 return 1;
1396 }
1397 }
1398
1399 return 0;
1400 }
1401
1402 void
1403 tsetdirt(int top, int bot) {
1404 int i;
1405
1406 LIMIT(top, 0, term.row-1);
1407 LIMIT(bot, 0, term.row-1);
1408
1409 for(i = top; i <= bot; i++)
1410 term.dirty[i] = 1;
1411 }
1412
1413 void
1414 tsetdirtattr(int attr) {
1415 int i, j;
1416
1417 for(i = 0; i < term.row-1; i++) {
1418 for(j = 0; j < term.col-1; j++) {
1419 if(term.line[i][j].mode & attr) {
1420 tsetdirt(i, i);
1421 break;
1422 }
1423 }
1424 }
1425 }
1426
1427 void
1428 tfulldirt(void) {
1429 tsetdirt(0, term.row-1);
1430 }
1431
1432 void
1433 tcursor(int mode) {
1434 static TCursor c[2];
1435 bool alt = IS_SET(MODE_ALTSCREEN);
1436
1437 if(mode == CURSOR_SAVE) {
1438 c[alt] = term.c;
1439 } else if(mode == CURSOR_LOAD) {
1440 term.c = c[alt];
1441 tmoveto(c[alt].x, c[alt].y);
1442 }
1443 }
1444
1445 void
1446 treset(void) {
1447 uint i;
1448
1449 term.c = (TCursor){{
1450 .mode = ATTR_NULL,
1451 .fg = defaultfg,
1452 .bg = defaultbg
1453 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1454
1455 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1456 for(i = tabspaces; i < term.col; i += tabspaces)
1457 term.tabs[i] = 1;
1458 term.top = 0;
1459 term.bot = term.row - 1;
1460 term.mode = MODE_WRAP;
1461 memset(term.trantbl, CS_USA, sizeof(term.trantbl));
1462 term.charset = 0;
1463
1464 for(i = 0; i < 2; i++) {
1465 tmoveto(0, 0);
1466 tcursor(CURSOR_SAVE);
1467 tclearregion(0, 0, term.col-1, term.row-1);
1468 tswapscreen();
1469 }
1470 }
1471
1472 void
1473 tnew(int col, int row) {
1474 term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } };
1475 tresize(col, row);
1476 term.numlock = 1;
1477
1478 treset();
1479 }
1480
1481 void
1482 tswapscreen(void) {
1483 Line *tmp = term.line;
1484
1485 term.line = term.alt;
1486 term.alt = tmp;
1487 term.mode ^= MODE_ALTSCREEN;
1488 tfulldirt();
1489 }
1490
1491 void
1492 tscrolldown(int orig, int n) {
1493 int i;
1494 Line temp;
1495
1496 LIMIT(n, 0, term.bot-orig+1);
1497
1498 tsetdirt(orig, term.bot-n);
1499 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1500
1501 for(i = term.bot; i >= orig+n; i--) {
1502 temp = term.line[i];
1503 term.line[i] = term.line[i-n];
1504 term.line[i-n] = temp;
1505 }
1506
1507 selscroll(orig, n);
1508 }
1509
1510 void
1511 tscrollup(int orig, int n) {
1512 int i;
1513 Line temp;
1514
1515 LIMIT(n, 0, term.bot-orig+1);
1516
1517 tclearregion(0, orig, term.col-1, orig+n-1);
1518 tsetdirt(orig+n, term.bot);
1519
1520 for(i = orig; i <= term.bot-n; i++) {
1521 temp = term.line[i];
1522 term.line[i] = term.line[i+n];
1523 term.line[i+n] = temp;
1524 }
1525
1526 selscroll(orig, -n);
1527 }
1528
1529 void
1530 selscroll(int orig, int n) {
1531 if(sel.ob.x == -1)
1532 return;
1533
1534 if(BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
1535 if((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
1536 selclear(NULL);
1537 return;
1538 }
1539 if(sel.type == SEL_RECTANGULAR) {
1540 if(sel.ob.y < term.top)
1541 sel.ob.y = term.top;
1542 if(sel.oe.y > term.bot)
1543 sel.oe.y = term.bot;
1544 } else {
1545 if(sel.ob.y < term.top) {
1546 sel.ob.y = term.top;
1547 sel.ob.x = 0;
1548 }
1549 if(sel.oe.y > term.bot) {
1550 sel.oe.y = term.bot;
1551 sel.oe.x = term.col;
1552 }
1553 }
1554 selnormalize();
1555 }
1556 }
1557
1558 void
1559 tnewline(int first_col) {
1560 int y = term.c.y;
1561
1562 if(y == term.bot) {
1563 tscrollup(term.top, 1);
1564 } else {
1565 y++;
1566 }
1567 tmoveto(first_col ? 0 : term.c.x, y);
1568 }
1569
1570 void
1571 csiparse(void) {
1572 char *p = csiescseq.buf, *np;
1573 long int v;
1574
1575 csiescseq.narg = 0;
1576 if(*p == '?') {
1577 csiescseq.priv = 1;
1578 p++;
1579 }
1580
1581 csiescseq.buf[csiescseq.len] = '\0';
1582 while(p < csiescseq.buf+csiescseq.len) {
1583 np = NULL;
1584 v = strtol(p, &np, 10);
1585 if(np == p)
1586 v = 0;
1587 if(v == LONG_MAX || v == LONG_MIN)
1588 v = -1;
1589 csiescseq.arg[csiescseq.narg++] = v;
1590 p = np;
1591 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1592 break;
1593 p++;
1594 }
1595 csiescseq.mode[0] = *p++;
1596 csiescseq.mode[1] = (p < csiescseq.buf+csiescseq.len) ? *p : '\0';
1597 }
1598
1599 /* for absolute user moves, when decom is set */
1600 void
1601 tmoveato(int x, int y) {
1602 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1603 }
1604
1605 void
1606 tmoveto(int x, int y) {
1607 int miny, maxy;
1608
1609 if(term.c.state & CURSOR_ORIGIN) {
1610 miny = term.top;
1611 maxy = term.bot;
1612 } else {
1613 miny = 0;
1614 maxy = term.row - 1;
1615 }
1616 term.c.state &= ~CURSOR_WRAPNEXT;
1617 term.c.x = LIMIT(x, 0, term.col-1);
1618 term.c.y = LIMIT(y, miny, maxy);
1619 }
1620
1621 void
1622 tsetchar(char *c, Glyph *attr, int x, int y) {
1623 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1624 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1625 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1626 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1627 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1628 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1629 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1630 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1631 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1632 };
1633
1634 /*
1635 * The table is proudly stolen from rxvt.
1636 */
1637 if(term.trantbl[term.charset] == CS_GRAPHIC0) {
1638 if(BETWEEN(c[0], 0x41, 0x7e) && vt100_0[c[0] - 0x41]) {
1639 c = vt100_0[c[0] - 0x41];
1640 }
1641 }
1642
1643 if(term.line[y][x].mode & ATTR_WIDE) {
1644 if(x+1 < term.col) {
1645 term.line[y][x+1].c[0] = ' ';
1646 term.line[y][x+1].mode &= ~ATTR_WDUMMY;
1647 }
1648 } else if(term.line[y][x].mode & ATTR_WDUMMY) {
1649 term.line[y][x-1].c[0] = ' ';
1650 term.line[y][x-1].mode &= ~ATTR_WIDE;
1651 }
1652
1653 term.dirty[y] = 1;
1654 term.line[y][x] = *attr;
1655 memcpy(term.line[y][x].c, c, UTF_SIZ);
1656 }
1657
1658 void
1659 tclearregion(int x1, int y1, int x2, int y2) {
1660 int x, y, temp;
1661 Glyph *gp;
1662
1663 if(x1 > x2)
1664 temp = x1, x1 = x2, x2 = temp;
1665 if(y1 > y2)
1666 temp = y1, y1 = y2, y2 = temp;
1667
1668 LIMIT(x1, 0, term.col-1);
1669 LIMIT(x2, 0, term.col-1);
1670 LIMIT(y1, 0, term.row-1);
1671 LIMIT(y2, 0, term.row-1);
1672
1673 for(y = y1; y <= y2; y++) {
1674 term.dirty[y] = 1;
1675 for(x = x1; x <= x2; x++) {
1676 gp = &term.line[y][x];
1677 if(selected(x, y))
1678 selclear(NULL);
1679 gp->fg = term.c.attr.fg;
1680 gp->bg = term.c.attr.bg;
1681 gp->mode = 0;
1682 memcpy(gp->c, " ", 2);
1683 }
1684 }
1685 }
1686
1687 void
1688 tdeletechar(int n) {
1689 int dst, src, size;
1690 Glyph *line;
1691
1692 LIMIT(n, 0, term.col - term.c.x);
1693
1694 dst = term.c.x;
1695 src = term.c.x + n;
1696 size = term.col - src;
1697 line = term.line[term.c.y];
1698
1699 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1700 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1701 }
1702
1703 void
1704 tinsertblank(int n) {
1705 int dst, src, size;
1706 Glyph *line;
1707
1708 LIMIT(n, 0, term.col - term.c.x);
1709
1710 dst = term.c.x + n;
1711 src = term.c.x;
1712 size = term.col - dst;
1713 line = term.line[term.c.y];
1714
1715 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1716 tclearregion(src, term.c.y, dst - 1, term.c.y);
1717 }
1718
1719 void
1720 tinsertblankline(int n) {
1721 if(BETWEEN(term.c.y, term.top, term.bot))
1722 tscrolldown(term.c.y, n);
1723 }
1724
1725 void
1726 tdeleteline(int n) {
1727 if(BETWEEN(term.c.y, term.top, term.bot))
1728 tscrollup(term.c.y, n);
1729 }
1730
1731 int32_t
1732 tdefcolor(int *attr, int *npar, int l) {
1733 int32_t idx = -1;
1734 uint r, g, b;
1735
1736 switch (attr[*npar + 1]) {
1737 case 2: /* direct color in RGB space */
1738 if (*npar + 4 >= l) {
1739 fprintf(stderr,
1740 "erresc(38): Incorrect number of parameters (%d)\n",
1741 *npar);
1742 break;
1743 }
1744 r = attr[*npar + 2];
1745 g = attr[*npar + 3];
1746 b = attr[*npar + 4];
1747 *npar += 4;
1748 if(!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
1749 fprintf(stderr, "erresc: bad rgb color (%d,%d,%d)\n",
1750 r, g, b);
1751 else
1752 idx = TRUECOLOR(r, g, b);
1753 break;
1754 case 5: /* indexed color */
1755 if (*npar + 2 >= l) {
1756 fprintf(stderr,
1757 "erresc(38): Incorrect number of parameters (%d)\n",
1758 *npar);
1759 break;
1760 }
1761 *npar += 2;
1762 if(!BETWEEN(attr[*npar], 0, 255))
1763 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
1764 else
1765 idx = attr[*npar];
1766 break;
1767 case 0: /* implemented defined (only foreground) */
1768 case 1: /* transparent */
1769 case 3: /* direct color in CMY space */
1770 case 4: /* direct color in CMYK space */
1771 default:
1772 fprintf(stderr,
1773 "erresc(38): gfx attr %d unknown\n", attr[*npar]);
1774 break;
1775 }
1776
1777 return idx;
1778 }
1779
1780 void
1781 tsetattr(int *attr, int l) {
1782 int i;
1783 int32_t idx;
1784
1785 for(i = 0; i < l; i++) {
1786 switch(attr[i]) {
1787 case 0:
1788 term.c.attr.mode &= ~(
1789 ATTR_BOLD |
1790 ATTR_FAINT |
1791 ATTR_ITALIC |
1792 ATTR_UNDERLINE |
1793 ATTR_BLINK |
1794 ATTR_REVERSE |
1795 ATTR_INVISIBLE |
1796 ATTR_STRUCK );
1797 term.c.attr.fg = defaultfg;
1798 term.c.attr.bg = defaultbg;
1799 break;
1800 case 1:
1801 term.c.attr.mode |= ATTR_BOLD;
1802 break;
1803 case 2:
1804 term.c.attr.mode |= ATTR_FAINT;
1805 break;
1806 case 3:
1807 term.c.attr.mode |= ATTR_ITALIC;
1808 break;
1809 case 4:
1810 term.c.attr.mode |= ATTR_UNDERLINE;
1811 break;
1812 case 5: /* slow blink */
1813 /* FALLTHROUGH */
1814 case 6: /* rapid blink */
1815 term.c.attr.mode |= ATTR_BLINK;
1816 break;
1817 case 7:
1818 term.c.attr.mode |= ATTR_REVERSE;
1819 break;
1820 case 8:
1821 term.c.attr.mode |= ATTR_INVISIBLE;
1822 break;
1823 case 9:
1824 term.c.attr.mode |= ATTR_STRUCK;
1825 break;
1826 case 22:
1827 term.c.attr.mode &= ~(ATTR_BOLD | ATTR_FAINT);
1828 break;
1829 case 23:
1830 term.c.attr.mode &= ~ATTR_ITALIC;
1831 break;
1832 case 24:
1833 term.c.attr.mode &= ~ATTR_UNDERLINE;
1834 break;
1835 case 25:
1836 term.c.attr.mode &= ~ATTR_BLINK;
1837 break;
1838 case 27:
1839 term.c.attr.mode &= ~ATTR_REVERSE;
1840 break;
1841 case 28:
1842 term.c.attr.mode &= ~ATTR_INVISIBLE;
1843 break;
1844 case 29:
1845 term.c.attr.mode &= ~ATTR_STRUCK;
1846 break;
1847 case 38:
1848 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1849 term.c.attr.fg = idx;
1850 break;
1851 case 39:
1852 term.c.attr.fg = defaultfg;
1853 break;
1854 case 48:
1855 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1856 term.c.attr.bg = idx;
1857 break;
1858 case 49:
1859 term.c.attr.bg = defaultbg;
1860 break;
1861 default:
1862 if(BETWEEN(attr[i], 30, 37)) {
1863 term.c.attr.fg = attr[i] - 30;
1864 } else if(BETWEEN(attr[i], 40, 47)) {
1865 term.c.attr.bg = attr[i] - 40;
1866 } else if(BETWEEN(attr[i], 90, 97)) {
1867 term.c.attr.fg = attr[i] - 90 + 8;
1868 } else if(BETWEEN(attr[i], 100, 107)) {
1869 term.c.attr.bg = attr[i] - 100 + 8;
1870 } else {
1871 fprintf(stderr,
1872 "erresc(default): gfx attr %d unknown\n",
1873 attr[i]), csidump();
1874 }
1875 break;
1876 }
1877 }
1878 }
1879
1880 void
1881 tsetscroll(int t, int b) {
1882 int temp;
1883
1884 LIMIT(t, 0, term.row-1);
1885 LIMIT(b, 0, term.row-1);
1886 if(t > b) {
1887 temp = t;
1888 t = b;
1889 b = temp;
1890 }
1891 term.top = t;
1892 term.bot = b;
1893 }
1894
1895 void
1896 tsetmode(bool priv, bool set, int *args, int narg) {
1897 int *lim, mode;
1898 bool alt;
1899
1900 for(lim = args + narg; args < lim; ++args) {
1901 if(priv) {
1902 switch(*args) {
1903 case 1: /* DECCKM -- Cursor key */
1904 MODBIT(term.mode, set, MODE_APPCURSOR);
1905 break;
1906 case 5: /* DECSCNM -- Reverse video */
1907 mode = term.mode;
1908 MODBIT(term.mode, set, MODE_REVERSE);
1909 if(mode != term.mode)
1910 redraw();
1911 break;
1912 case 6: /* DECOM -- Origin */
1913 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1914 tmoveato(0, 0);
1915 break;
1916 case 7: /* DECAWM -- Auto wrap */
1917 MODBIT(term.mode, set, MODE_WRAP);
1918 break;
1919 case 0: /* Error (IGNORED) */
1920 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1921 case 3: /* DECCOLM -- Column (IGNORED) */
1922 case 4: /* DECSCLM -- Scroll (IGNORED) */
1923 case 8: /* DECARM -- Auto repeat (IGNORED) */
1924 case 18: /* DECPFF -- Printer feed (IGNORED) */
1925 case 19: /* DECPEX -- Printer extent (IGNORED) */
1926 case 42: /* DECNRCM -- National characters (IGNORED) */
1927 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1928 break;
1929 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1930 MODBIT(term.mode, !set, MODE_HIDE);
1931 break;
1932 case 9: /* X10 mouse compatibility mode */
1933 xsetpointermotion(0);
1934 MODBIT(term.mode, 0, MODE_MOUSE);
1935 MODBIT(term.mode, set, MODE_MOUSEX10);
1936 break;
1937 case 1000: /* 1000: report button press */
1938 xsetpointermotion(0);
1939 MODBIT(term.mode, 0, MODE_MOUSE);
1940 MODBIT(term.mode, set, MODE_MOUSEBTN);
1941 break;
1942 case 1002: /* 1002: report motion on button press */
1943 xsetpointermotion(0);
1944 MODBIT(term.mode, 0, MODE_MOUSE);
1945 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1946 break;
1947 case 1003: /* 1003: enable all mouse motions */
1948 xsetpointermotion(set);
1949 MODBIT(term.mode, 0, MODE_MOUSE);
1950 MODBIT(term.mode, set, MODE_MOUSEMANY);
1951 break;
1952 case 1004: /* 1004: send focus events to tty */
1953 MODBIT(term.mode, set, MODE_FOCUS);
1954 break;
1955 case 1006: /* 1006: extended reporting mode */
1956 MODBIT(term.mode, set, MODE_MOUSESGR);
1957 break;
1958 case 1034:
1959 MODBIT(term.mode, set, MODE_8BIT);
1960 break;
1961 case 1049: /* swap screen & set/restore cursor as xterm */
1962 if (!allowaltscreen)
1963 break;
1964 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1965 /* FALLTHROUGH */
1966 case 47: /* swap screen */
1967 case 1047:
1968 if (!allowaltscreen)
1969 break;
1970 alt = IS_SET(MODE_ALTSCREEN);
1971 if(alt) {
1972 tclearregion(0, 0, term.col-1,
1973 term.row-1);
1974 }
1975 if(set ^ alt) /* set is always 1 or 0 */
1976 tswapscreen();
1977 if(*args != 1049)
1978 break;
1979 /* FALLTHROUGH */
1980 case 1048:
1981 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1982 break;
1983 case 2004: /* 2004: bracketed paste mode */
1984 MODBIT(term.mode, set, MODE_BRCKTPASTE);
1985 break;
1986 /* Not implemented mouse modes. See comments there. */
1987 case 1001: /* mouse highlight mode; can hang the
1988 terminal by design when implemented. */
1989 case 1005: /* UTF-8 mouse mode; will confuse
1990 applications not supporting UTF-8
1991 and luit. */
1992 case 1015: /* urxvt mangled mouse mode; incompatible
1993 and can be mistaken for other control
1994 codes. */
1995 default:
1996 fprintf(stderr,
1997 "erresc: unknown private set/reset mode %d\n",
1998 *args);
1999 break;
2000 }
2001 } else {
2002 switch(*args) {
2003 case 0: /* Error (IGNORED) */
2004 break;
2005 case 2: /* KAM -- keyboard action */
2006 MODBIT(term.mode, set, MODE_KBDLOCK);
2007 break;
2008 case 4: /* IRM -- Insertion-replacement */
2009 MODBIT(term.mode, set, MODE_INSERT);
2010 break;
2011 case 12: /* SRM -- Send/Receive */
2012 MODBIT(term.mode, !set, MODE_ECHO);
2013 break;
2014 case 20: /* LNM -- Linefeed/new line */
2015 MODBIT(term.mode, set, MODE_CRLF);
2016 break;
2017 default:
2018 fprintf(stderr,
2019 "erresc: unknown set/reset mode %d\n",
2020 *args);
2021 break;
2022 }
2023 }
2024 }
2025 }
2026
2027 void
2028 csihandle(void) {
2029 char buf[40];
2030 int len;
2031
2032 switch(csiescseq.mode[0]) {
2033 default:
2034 unknown:
2035 fprintf(stderr, "erresc: unknown csi ");
2036 csidump();
2037 /* die(""); */
2038 break;
2039 case '@': /* ICH -- Insert <n> blank char */
2040 DEFAULT(csiescseq.arg[0], 1);
2041 tinsertblank(csiescseq.arg[0]);
2042 break;
2043 case 'A': /* CUU -- Cursor <n> Up */
2044 DEFAULT(csiescseq.arg[0], 1);
2045 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
2046 break;
2047 case 'B': /* CUD -- Cursor <n> Down */
2048 case 'e': /* VPR --Cursor <n> Down */
2049 DEFAULT(csiescseq.arg[0], 1);
2050 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
2051 break;
2052 case 'i': /* MC -- Media Copy */
2053 switch(csiescseq.arg[0]) {
2054 case 0:
2055 tdump();
2056 break;
2057 case 1:
2058 tdumpline(term.c.y);
2059 break;
2060 case 2:
2061 tdumpsel();
2062 break;
2063 case 4:
2064 term.mode &= ~MODE_PRINT;
2065 break;
2066 case 5:
2067 term.mode |= MODE_PRINT;
2068 break;
2069 }
2070 break;
2071 case 'c': /* DA -- Device Attributes */
2072 if(csiescseq.arg[0] == 0)
2073 ttywrite(vtiden, sizeof(vtiden) - 1);
2074 break;
2075 case 'C': /* CUF -- Cursor <n> Forward */
2076 case 'a': /* HPR -- Cursor <n> Forward */
2077 DEFAULT(csiescseq.arg[0], 1);
2078 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
2079 break;
2080 case 'D': /* CUB -- Cursor <n> Backward */
2081 DEFAULT(csiescseq.arg[0], 1);
2082 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
2083 break;
2084 case 'E': /* CNL -- Cursor <n> Down and first col */
2085 DEFAULT(csiescseq.arg[0], 1);
2086 tmoveto(0, term.c.y+csiescseq.arg[0]);
2087 break;
2088 case 'F': /* CPL -- Cursor <n> Up and first col */
2089 DEFAULT(csiescseq.arg[0], 1);
2090 tmoveto(0, term.c.y-csiescseq.arg[0]);
2091 break;
2092 case 'g': /* TBC -- Tabulation clear */
2093 switch(csiescseq.arg[0]) {
2094 case 0: /* clear current tab stop */
2095 term.tabs[term.c.x] = 0;
2096 break;
2097 case 3: /* clear all the tabs */
2098 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
2099 break;
2100 default:
2101 goto unknown;
2102 }
2103 break;
2104 case 'G': /* CHA -- Move to <col> */
2105 case '`': /* HPA */
2106 DEFAULT(csiescseq.arg[0], 1);
2107 tmoveto(csiescseq.arg[0]-1, term.c.y);
2108 break;
2109 case 'H': /* CUP -- Move to <row> <col> */
2110 case 'f': /* HVP */
2111 DEFAULT(csiescseq.arg[0], 1);
2112 DEFAULT(csiescseq.arg[1], 1);
2113 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
2114 break;
2115 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
2116 DEFAULT(csiescseq.arg[0], 1);
2117 tputtab(csiescseq.arg[0]);
2118 break;
2119 case 'J': /* ED -- Clear screen */
2120 selclear(NULL);
2121 switch(csiescseq.arg[0]) {
2122 case 0: /* below */
2123 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
2124 if(term.c.y < term.row-1) {
2125 tclearregion(0, term.c.y+1, term.col-1,
2126 term.row-1);
2127 }
2128 break;
2129 case 1: /* above */
2130 if(term.c.y > 1)
2131 tclearregion(0, 0, term.col-1, term.c.y-1);
2132 tclearregion(0, term.c.y, term.c.x, term.c.y);
2133 break;
2134 case 2: /* all */
2135 tclearregion(0, 0, term.col-1, term.row-1);
2136 break;
2137 default:
2138 goto unknown;
2139 }
2140 break;
2141 case 'K': /* EL -- Clear line */
2142 switch(csiescseq.arg[0]) {
2143 case 0: /* right */
2144 tclearregion(term.c.x, term.c.y, term.col-1,
2145 term.c.y);
2146 break;
2147 case 1: /* left */
2148 tclearregion(0, term.c.y, term.c.x, term.c.y);
2149 break;
2150 case 2: /* all */
2151 tclearregion(0, term.c.y, term.col-1, term.c.y);
2152 break;
2153 }
2154 break;
2155 case 'S': /* SU -- Scroll <n> line up */
2156 DEFAULT(csiescseq.arg[0], 1);
2157 tscrollup(term.top, csiescseq.arg[0]);
2158 break;
2159 case 'T': /* SD -- Scroll <n> line down */
2160 DEFAULT(csiescseq.arg[0], 1);
2161 tscrolldown(term.top, csiescseq.arg[0]);
2162 break;
2163 case 'L': /* IL -- Insert <n> blank lines */
2164 DEFAULT(csiescseq.arg[0], 1);
2165 tinsertblankline(csiescseq.arg[0]);
2166 break;
2167 case 'l': /* RM -- Reset Mode */
2168 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
2169 break;
2170 case 'M': /* DL -- Delete <n> lines */
2171 DEFAULT(csiescseq.arg[0], 1);
2172 tdeleteline(csiescseq.arg[0]);
2173 break;
2174 case 'X': /* ECH -- Erase <n> char */
2175 DEFAULT(csiescseq.arg[0], 1);
2176 tclearregion(term.c.x, term.c.y,
2177 term.c.x + csiescseq.arg[0] - 1, term.c.y);
2178 break;
2179 case 'P': /* DCH -- Delete <n> char */
2180 DEFAULT(csiescseq.arg[0], 1);
2181 tdeletechar(csiescseq.arg[0]);
2182 break;
2183 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
2184 DEFAULT(csiescseq.arg[0], 1);
2185 tputtab(-csiescseq.arg[0]);
2186 break;
2187 case 'd': /* VPA -- Move to <row> */
2188 DEFAULT(csiescseq.arg[0], 1);
2189 tmoveato(term.c.x, csiescseq.arg[0]-1);
2190 break;
2191 case 'h': /* SM -- Set terminal mode */
2192 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
2193 break;
2194 case 'm': /* SGR -- Terminal attribute (color) */
2195 tsetattr(csiescseq.arg, csiescseq.narg);
2196 break;
2197 case 'n': /* DSR – Device Status Report (cursor position) */
2198 if (csiescseq.arg[0] == 6) {
2199 len = snprintf(buf, sizeof(buf),"\033[%i;%iR",
2200 term.c.y+1, term.c.x+1);
2201 ttywrite(buf, len);
2202 }
2203 break;
2204 case 'r': /* DECSTBM -- Set Scrolling Region */
2205 if(csiescseq.priv) {
2206 goto unknown;
2207 } else {
2208 DEFAULT(csiescseq.arg[0], 1);
2209 DEFAULT(csiescseq.arg[1], term.row);
2210 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
2211 tmoveato(0, 0);
2212 }
2213 break;
2214 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
2215 tcursor(CURSOR_SAVE);
2216 break;
2217 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
2218 tcursor(CURSOR_LOAD);
2219 break;
2220 case ' ':
2221 switch (csiescseq.mode[1]) {
2222 case 'q': /* DECSCUSR -- Set Cursor Style */
2223 DEFAULT(csiescseq.arg[0], 1);
2224 if (!BETWEEN(csiescseq.arg[0], 0, 6)) {
2225 goto unknown;
2226 }
2227 xw.cursor = csiescseq.arg[0];
2228 break;
2229 default:
2230 goto unknown;
2231 }
2232 break;
2233 }
2234 }
2235
2236 void
2237 csidump(void) {
2238 int i;
2239 uint c;
2240
2241 printf("ESC[");
2242 for(i = 0; i < csiescseq.len; i++) {
2243 c = csiescseq.buf[i] & 0xff;
2244 if(isprint(c)) {
2245 putchar(c);
2246 } else if(c == '\n') {
2247 printf("(\\n)");
2248 } else if(c == '\r') {
2249 printf("(\\r)");
2250 } else if(c == 0x1b) {
2251 printf("(\\e)");
2252 } else {
2253 printf("(%02x)", c);
2254 }
2255 }
2256 putchar('\n');
2257 }
2258
2259 void
2260 csireset(void) {
2261 memset(&csiescseq, 0, sizeof(csiescseq));
2262 }
2263
2264 void
2265 strhandle(void) {
2266 char *p = NULL;
2267 int j, narg, par;
2268
2269 term.esc &= ~(ESC_STR_END|ESC_STR);
2270 strparse();
2271 par = (narg = strescseq.narg) ? atoi(strescseq.args[0]) : 0;
2272
2273 switch(strescseq.type) {
2274 case ']': /* OSC -- Operating System Command */
2275 switch(par) {
2276 case 0:
2277 case 1:
2278 case 2:
2279 if(narg > 1)
2280 xsettitle(strescseq.args[1]);
2281 return;
2282 case 4: /* color set */
2283 if(narg < 3)
2284 break;
2285 p = strescseq.args[2];
2286 /* FALLTHROUGH */
2287 case 104: /* color reset, here p = NULL */
2288 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2289 if(xsetcolorname(j, p)) {
2290 fprintf(stderr, "erresc: invalid color %s\n", p);
2291 } else {
2292 /*
2293 * TODO if defaultbg color is changed, borders
2294 * are dirty
2295 */
2296 redraw();
2297 }
2298 return;
2299 }
2300 break;
2301 case 'k': /* old title set compatibility */
2302 xsettitle(strescseq.args[0]);
2303 return;
2304 case 'P': /* DCS -- Device Control String */
2305 case '_': /* APC -- Application Program Command */
2306 case '^': /* PM -- Privacy Message */
2307 return;
2308 }
2309
2310 fprintf(stderr, "erresc: unknown str ");
2311 strdump();
2312 }
2313
2314 void
2315 strparse(void) {
2316 int c;
2317 char *p = strescseq.buf;
2318
2319 strescseq.narg = 0;
2320 strescseq.buf[strescseq.len] = '\0';
2321
2322 if(*p == '\0')
2323 return;
2324
2325 while(strescseq.narg < STR_ARG_SIZ) {
2326 strescseq.args[strescseq.narg++] = p;
2327 while((c = *p) != ';' && c != '\0')
2328 ++p;
2329 if(c == '\0')
2330 return;
2331 *p++ = '\0';
2332 }
2333 }
2334
2335 void
2336 strdump(void) {
2337 int i;
2338 uint c;
2339
2340 printf("ESC%c", strescseq.type);
2341 for(i = 0; i < strescseq.len; i++) {
2342 c = strescseq.buf[i] & 0xff;
2343 if(c == '\0') {
2344 return;
2345 } else if(isprint(c)) {
2346 putchar(c);
2347 } else if(c == '\n') {
2348 printf("(\\n)");
2349 } else if(c == '\r') {
2350 printf("(\\r)");
2351 } else if(c == 0x1b) {
2352 printf("(\\e)");
2353 } else {
2354 printf("(%02x)", c);
2355 }
2356 }
2357 printf("ESC\\\n");
2358 }
2359
2360 void
2361 strreset(void) {
2362 memset(&strescseq, 0, sizeof(strescseq));
2363 }
2364
2365 void
2366 tprinter(char *s, size_t len) {
2367 if(iofd != -1 && xwrite(iofd, s, len) < 0) {
2368 fprintf(stderr, "Error writing in %s:%s\n",
2369 opt_io, strerror(errno));
2370 close(iofd);
2371 iofd = -1;
2372 }
2373 }
2374
2375 void
2376 toggleprinter(const Arg *arg) {
2377 term.mode ^= MODE_PRINT;
2378 }
2379
2380 void
2381 printscreen(const Arg *arg) {
2382 tdump();
2383 }
2384
2385 void
2386 printsel(const Arg *arg) {
2387 tdumpsel();
2388 }
2389
2390 void
2391 tdumpsel(void) {
2392 char *ptr;
2393
2394 if((ptr = getsel())) {
2395 tprinter(ptr, strlen(ptr));
2396 free(ptr);
2397 }
2398 }
2399
2400 void
2401 tdumpline(int n) {
2402 Glyph *bp, *end;
2403
2404 bp = &term.line[n][0];
2405 end = &bp[MIN(tlinelen(n), term.col) - 1];
2406 if(bp != end || bp->c[0] != ' ') {
2407 for( ;bp <= end; ++bp)
2408 tprinter(bp->c, utf8len(bp->c));
2409 }
2410 tprinter("\n", 1);
2411 }
2412
2413 void
2414 tdump(void) {
2415 int i;
2416
2417 for(i = 0; i < term.row; ++i)
2418 tdumpline(i);
2419 }
2420
2421 void
2422 tputtab(int n) {
2423 uint x = term.c.x;
2424
2425 if(n > 0) {
2426 while(x < term.col && n--)
2427 for(++x; x < term.col && !term.tabs[x]; ++x)
2428 /* nothing */ ;
2429 } else if(n < 0) {
2430 while(x > 0 && n++)
2431 for(--x; x > 0 && !term.tabs[x]; --x)
2432 /* nothing */ ;
2433 }
2434 term.c.x = LIMIT(x, 0, term.col-1);
2435 }
2436
2437 void
2438 techo(char *buf, int len) {
2439 for(; len > 0; buf++, len--) {
2440 char c = *buf;
2441
2442 if(ISCONTROL((uchar) c)) { /* control code */
2443 if(c & 0x80) {
2444 c &= 0x7f;
2445 tputc("^", 1);
2446 tputc("[", 1);
2447 } else if(c != '\n' && c != '\r' && c != '\t') {
2448 c ^= 0x40;
2449 tputc("^", 1);
2450 }
2451 tputc(&c, 1);
2452 } else {
2453 break;
2454 }
2455 }
2456 if(len)
2457 tputc(buf, len);
2458 }
2459
2460 void
2461 tdeftran(char ascii) {
2462 static char cs[] = "0B";
2463 static int vcs[] = {CS_GRAPHIC0, CS_USA};
2464 char *p;
2465
2466 if((p = strchr(cs, ascii)) == NULL) {
2467 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2468 } else {
2469 term.trantbl[term.icharset] = vcs[p - cs];
2470 }
2471 }
2472
2473 void
2474 tdectest(char c) {
2475 static char E[UTF_SIZ] = "E";
2476 int x, y;
2477
2478 if(c == '8') { /* DEC screen alignment test. */
2479 for(x = 0; x < term.col; ++x) {
2480 for(y = 0; y < term.row; ++y)
2481 tsetchar(E, &term.c.attr, x, y);
2482 }
2483 }
2484 }
2485
2486 void
2487 tstrsequence(uchar c) {
2488 switch (c) {
2489 case 0x90: /* DCS -- Device Control String */
2490 c = 'P';
2491 break;
2492 case 0x9f: /* APC -- Application Program Command */
2493 c = '_';
2494 break;
2495 case 0x9e: /* PM -- Privacy Message */
2496 c = '^';
2497 break;
2498 case 0x9d: /* OSC -- Operating System Command */
2499 c = ']';
2500 break;
2501 }
2502 strreset();
2503 strescseq.type = c;
2504 term.esc |= ESC_STR;
2505 }
2506
2507 void
2508 tcontrolcode(uchar ascii) {
2509 static char question[UTF_SIZ] = "?";
2510
2511 switch(ascii) {
2512 case '\t': /* HT */
2513 tputtab(1);
2514 return;
2515 case '\b': /* BS */
2516 tmoveto(term.c.x-1, term.c.y);
2517 return;
2518 case '\r': /* CR */
2519 tmoveto(0, term.c.y);
2520 return;
2521 case '\f': /* LF */
2522 case '\v': /* VT */
2523 case '\n': /* LF */
2524 /* go to first col if the mode is set */
2525 tnewline(IS_SET(MODE_CRLF));
2526 return;
2527 case '\a': /* BEL */
2528 if(term.esc & ESC_STR_END) {
2529 /* backwards compatibility to xterm */
2530 strhandle();
2531 } else {
2532 if(!(xw.state & WIN_FOCUSED))
2533 xseturgency(1);
2534 if (bellvolume)
2535 XkbBell(xw.dpy, xw.win, bellvolume, (Atom)NULL);
2536 }
2537 break;
2538 case '\033': /* ESC */
2539 csireset();
2540 term.esc &= ~(ESC_CSI|ESC_ALTCHARSET|ESC_TEST);
2541 term.esc |= ESC_START;
2542 return;
2543 case '\016': /* SO (LS1 -- Locking shift 1) */
2544 case '\017': /* SI (LS0 -- Locking shift 0) */
2545 term.charset = 1 - (ascii - '\016');
2546 return;
2547 case '\032': /* SUB */
2548 tsetchar(question, &term.c.attr, term.c.x, term.c.y);
2549 case '\030': /* CAN */
2550 csireset();
2551 break;
2552 case '\005': /* ENQ (IGNORED) */
2553 case '\000': /* NUL (IGNORED) */
2554 case '\021': /* XON (IGNORED) */
2555 case '\023': /* XOFF (IGNORED) */
2556 case 0177: /* DEL (IGNORED) */
2557 return;
2558 case 0x84: /* TODO: IND */
2559 break;
2560 case 0x85: /* NEL -- Next line */
2561 tnewline(1); /* always go to first col */
2562 break;
2563 case 0x88: /* HTS -- Horizontal tab stop */
2564 term.tabs[term.c.x] = 1;
2565 break;
2566 case 0x8d: /* TODO: RI */
2567 case 0x8e: /* TODO: SS2 */
2568 case 0x8f: /* TODO: SS3 */
2569 case 0x98: /* TODO: SOS */
2570 break;
2571 case 0x9a: /* DECID -- Identify Terminal */
2572 ttywrite(vtiden, sizeof(vtiden) - 1);
2573 break;
2574 case 0x9b: /* TODO: CSI */
2575 case 0x9c: /* TODO: ST */
2576 break;
2577 case 0x90: /* DCS -- Device Control String */
2578 case 0x9f: /* APC -- Application Program Command */
2579 case 0x9e: /* PM -- Privacy Message */
2580 case 0x9d: /* OSC -- Operating System Command */
2581 tstrsequence(ascii);
2582 return;
2583 }
2584 /* only CAN, SUB, \a and C1 chars interrupt a sequence */
2585 term.esc &= ~(ESC_STR_END|ESC_STR);
2586 }
2587
2588 /*
2589 * returns 1 when the sequence is finished and it hasn't to read
2590 * more characters for this sequence, otherwise 0
2591 */
2592 int
2593 eschandle(uchar ascii) {
2594 switch(ascii) {
2595 case '[':
2596 term.esc |= ESC_CSI;
2597 return 0;
2598 case '#':
2599 term.esc |= ESC_TEST;
2600 return 0;
2601 case 'P': /* DCS -- Device Control String */
2602 case '_': /* APC -- Application Program Command */
2603 case '^': /* PM -- Privacy Message */
2604 case ']': /* OSC -- Operating System Command */
2605 case 'k': /* old title set compatibility */
2606 tstrsequence(ascii);
2607 return 0;
2608 case 'n': /* LS2 -- Locking shift 2 */
2609 case 'o': /* LS3 -- Locking shift 3 */
2610 term.charset = 2 + (ascii - 'n');
2611 break;
2612 case '(': /* GZD4 -- set primary charset G0 */
2613 case ')': /* G1D4 -- set secondary charset G1 */
2614 case '*': /* G2D4 -- set tertiary charset G2 */
2615 case '+': /* G3D4 -- set quaternary charset G3 */
2616 term.icharset = ascii - '(';
2617 term.esc |= ESC_ALTCHARSET;
2618 return 0;
2619 case 'D': /* IND -- Linefeed */
2620 if(term.c.y == term.bot) {
2621 tscrollup(term.top, 1);
2622 } else {
2623 tmoveto(term.c.x, term.c.y+1);
2624 }
2625 break;
2626 case 'E': /* NEL -- Next line */
2627 tnewline(1); /* always go to first col */
2628 break;
2629 case 'H': /* HTS -- Horizontal tab stop */
2630 term.tabs[term.c.x] = 1;
2631 break;
2632 case 'M': /* RI -- Reverse index */
2633 if(term.c.y == term.top) {
2634 tscrolldown(term.top, 1);
2635 } else {
2636 tmoveto(term.c.x, term.c.y-1);
2637 }
2638 break;
2639 case 'Z': /* DECID -- Identify Terminal */
2640 ttywrite(vtiden, sizeof(vtiden) - 1);
2641 break;
2642 case 'c': /* RIS -- Reset to inital state */
2643 treset();
2644 xresettitle();
2645 xloadcols();
2646 break;
2647 case '=': /* DECPAM -- Application keypad */
2648 term.mode |= MODE_APPKEYPAD;
2649 break;
2650 case '>': /* DECPNM -- Normal keypad */
2651 term.mode &= ~MODE_APPKEYPAD;
2652 break;
2653 case '7': /* DECSC -- Save Cursor */
2654 tcursor(CURSOR_SAVE);
2655 break;
2656 case '8': /* DECRC -- Restore Cursor */
2657 tcursor(CURSOR_LOAD);
2658 break;
2659 case '\\': /* ST -- String Terminator */
2660 if(term.esc & ESC_STR_END)
2661 strhandle();
2662 break;
2663 default:
2664 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2665 (uchar) ascii, isprint(ascii)? ascii:'.');
2666 break;
2667 }
2668 return 1;
2669 }
2670
2671 void
2672 tputc(char *c, int len) {
2673 uchar ascii;
2674 bool control;
2675 long unicodep;
2676 int width;
2677 Glyph *gp;
2678
2679 if(len == 1) {
2680 width = 1;
2681 unicodep = ascii = *c;
2682 } else {
2683 utf8decode(c, &unicodep, UTF_SIZ);
2684 if ((width = wcwidth(unicodep)) == -1) {
2685 c = "\357\277\275"; /* UTF_INVALID */
2686 width = 1;
2687 }
2688 ascii = unicodep;
2689 }
2690
2691 if(IS_SET(MODE_PRINT))
2692 tprinter(c, len);
2693 control = ISCONTROL(unicodep);
2694
2695 /*
2696 * STR sequence must be checked before anything else
2697 * because it uses all following characters until it
2698 * receives a ESC, a SUB, a ST or any other C1 control
2699 * character.
2700 */
2701 if(term.esc & ESC_STR) {
2702 if(len == 1 &&
2703 (ascii == '\a' || ascii == 030 ||
2704 ascii == 032 || ascii == 033 ||
2705 ISCONTROLC1(unicodep))) {
2706 term.esc &= ~(ESC_START|ESC_STR);
2707 term.esc |= ESC_STR_END;
2708 } else if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2709 memmove(&strescseq.buf[strescseq.len], c, len);
2710 strescseq.len += len;
2711 return;
2712 } else {
2713 /*
2714 * Here is a bug in terminals. If the user never sends
2715 * some code to stop the str or esc command, then st
2716 * will stop responding. But this is better than
2717 * silently failing with unknown characters. At least
2718 * then users will report back.
2719 *
2720 * In the case users ever get fixed, here is the code:
2721 */
2722 /*
2723 * term.esc = 0;
2724 * strhandle();
2725 */
2726 return;
2727 }
2728 }
2729
2730 /*
2731 * Actions of control codes must be performed as soon they arrive
2732 * because they can be embedded inside a control sequence, and
2733 * they must not cause conflicts with sequences.
2734 */
2735 if(control) {
2736 tcontrolcode(ascii);
2737 /*
2738 * control codes are not shown ever
2739 */
2740 return;
2741 } else if(term.esc & ESC_START) {
2742 if(term.esc & ESC_CSI) {
2743 csiescseq.buf[csiescseq.len++] = ascii;
2744 if(BETWEEN(ascii, 0x40, 0x7E)
2745 || csiescseq.len >= \
2746 sizeof(csiescseq.buf)-1) {
2747 term.esc = 0;
2748 csiparse();
2749 csihandle();
2750 }
2751 return;
2752 } else if(term.esc & ESC_ALTCHARSET) {
2753 tdeftran(ascii);
2754 } else if(term.esc & ESC_TEST) {
2755 tdectest(ascii);
2756 } else {
2757 if (!eschandle(ascii))
2758 return;
2759 /* sequence already finished */
2760 }
2761 term.esc = 0;
2762 /*
2763 * All characters which form part of a sequence are not
2764 * printed
2765 */
2766 return;
2767 }
2768 if(sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
2769 selclear(NULL);
2770
2771 gp = &term.line[term.c.y][term.c.x];
2772 if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2773 gp->mode |= ATTR_WRAP;
2774 tnewline(1);
2775 gp = &term.line[term.c.y][term.c.x];
2776 }
2777
2778 if(IS_SET(MODE_INSERT) && term.c.x+width < term.col)
2779 memmove(gp+width, gp, (term.col - term.c.x - width) * sizeof(Glyph));
2780
2781 if(term.c.x+width > term.col) {
2782 tnewline(1);
2783 gp = &term.line[term.c.y][term.c.x];
2784 }
2785
2786 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2787
2788 if(width == 2) {
2789 gp->mode |= ATTR_WIDE;
2790 if(term.c.x+1 < term.col) {
2791 gp[1].c[0] = '\0';
2792 gp[1].mode = ATTR_WDUMMY;
2793 }
2794 }
2795 if(term.c.x+width < term.col) {
2796 tmoveto(term.c.x+width, term.c.y);
2797 } else {
2798 term.c.state |= CURSOR_WRAPNEXT;
2799 }
2800 }
2801
2802 void
2803 tresize(int col, int row) {
2804 int i;
2805 int minrow = MIN(row, term.row);
2806 int mincol = MIN(col, term.col);
2807 bool *bp;
2808 TCursor c;
2809
2810 if(col < 1 || row < 1) {
2811 fprintf(stderr,
2812 "tresize: error resizing to %dx%d\n", col, row);
2813 return;
2814 }
2815
2816 /*
2817 * slide screen to keep cursor where we expect it -
2818 * tscrollup would work here, but we can optimize to
2819 * memmove because we're freeing the earlier lines
2820 */
2821 for(i = 0; i <= term.c.y - row; i++) {
2822 free(term.line[i]);
2823 free(term.alt[i]);
2824 }
2825 /* ensure that both src and dst are not NULL */
2826 if (i > 0) {
2827 memmove(term.line, term.line + i, row * sizeof(Line));
2828 memmove(term.alt, term.alt + i, row * sizeof(Line));
2829 }
2830 for(i += row; i < term.row; i++) {
2831 free(term.line[i]);
2832 free(term.alt[i]);
2833 }
2834
2835 /* resize to new height */
2836 term.line = xrealloc(term.line, row * sizeof(Line));
2837 term.alt = xrealloc(term.alt, row * sizeof(Line));
2838 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2839 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2840
2841 /* resize each row to new width, zero-pad if needed */
2842 for(i = 0; i < minrow; i++) {
2843 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2844 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2845 }
2846
2847 /* allocate any new rows */
2848 for(/* i == minrow */; i < row; i++) {
2849 term.line[i] = xmalloc(col * sizeof(Glyph));
2850 term.alt[i] = xmalloc(col * sizeof(Glyph));
2851 }
2852 if(col > term.col) {
2853 bp = term.tabs + term.col;
2854
2855 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2856 while(--bp > term.tabs && !*bp)
2857 /* nothing */ ;
2858 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2859 *bp = 1;
2860 }
2861 /* update terminal size */
2862 term.col = col;
2863 term.row = row;
2864 /* reset scrolling region */
2865 tsetscroll(0, row-1);
2866 /* make use of the LIMIT in tmoveto */
2867 tmoveto(term.c.x, term.c.y);
2868 /* Clearing both screens (it makes dirty all lines) */
2869 c = term.c;
2870 for(i = 0; i < 2; i++) {
2871 if(mincol < col && 0 < minrow) {
2872 tclearregion(mincol, 0, col - 1, minrow - 1);
2873 }
2874 if(0 < col && minrow < row) {
2875 tclearregion(0, minrow, col - 1, row - 1);
2876 }
2877 tswapscreen();
2878 tcursor(CURSOR_LOAD);
2879 }
2880 term.c = c;
2881 }
2882
2883 void
2884 xresize(int col, int row) {
2885 xw.tw = MAX(1, col * xw.cw);
2886 xw.th = MAX(1, row * xw.ch);
2887
2888 XFreePixmap(xw.dpy, xw.buf);
2889 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2890 DefaultDepth(xw.dpy, xw.scr));
2891 XftDrawChange(xw.draw, xw.buf);
2892 xclear(0, 0, xw.w, xw.h);
2893 }
2894
2895 ushort
2896 sixd_to_16bit(int x) {
2897 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2898 }
2899
2900 void
2901 xloadcols(void) {
2902 int i;
2903 XRenderColor color = { .alpha = 0xffff };
2904 static bool loaded;
2905 Color *cp;
2906
2907 if(loaded) {
2908 for (cp = dc.col; cp < &dc.col[LEN(dc.col)]; ++cp)
2909 XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
2910 }
2911
2912 /* load colors [0-15] and [256-LEN(colorname)] (config.h) */
2913 for(i = 0; i < LEN(colorname); i++) {
2914 if(!colorname[i])
2915 continue;
2916 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2917 die("Could not allocate color '%s'\n", colorname[i]);
2918 }
2919 }
2920
2921 /* load colors [16-231] ; same colors as xterm */
2922 for(i = 16; i < 6*6*6+16; i++) {
2923 color.red = sixd_to_16bit( ((i-16)/36)%6 );
2924 color.green = sixd_to_16bit( ((i-16)/6) %6 );
2925 color.blue = sixd_to_16bit( ((i-16)/1) %6 );
2926 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i]))
2927 die("Could not allocate color %d\n", i);
2928 }
2929
2930 /* load colors [232-255] ; grayscale */
2931 for(; i < 256; i++) {
2932 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (i-(6*6*6+16));
2933 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i]))
2934 die("Could not allocate color %d\n", i);
2935 }
2936 loaded = true;
2937 }
2938
2939 int
2940 xsetcolorname(int x, const char *name) {
2941 XRenderColor color = { .alpha = 0xffff };
2942 Color ncolor;
2943
2944 if(!BETWEEN(x, 0, LEN(colorname)))
2945 return 1;
2946
2947 if(!name) {
2948 if(BETWEEN(x, 16, 16 + 215)) { /* 256 color */
2949 color.red = sixd_to_16bit( ((x-16)/36)%6 );
2950 color.green = sixd_to_16bit( ((x-16)/6) %6 );
2951 color.blue = sixd_to_16bit( ((x-16)/1) %6 );
2952 if(!XftColorAllocValue(xw.dpy, xw.vis,
2953 xw.cmap, &color, &ncolor)) {
2954 return 1;
2955 }
2956
2957 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2958 dc.col[x] = ncolor;
2959 return 0;
2960 } else if(BETWEEN(x, 16 + 216, 255)) { /* greyscale */
2961 color.red = color.green = color.blue = \
2962 0x0808 + 0x0a0a * (x - (16 + 216));
2963 if(!XftColorAllocValue(xw.dpy, xw.vis,
2964 xw.cmap, &color, &ncolor)) {
2965 return 1;
2966 }
2967
2968 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2969 dc.col[x] = ncolor;
2970 return 0;
2971 } else { /* system colors */
2972 name = colorname[x];
2973 }
2974 }
2975 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &ncolor))
2976 return 1;
2977
2978 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2979 dc.col[x] = ncolor;
2980 return 0;
2981 }
2982
2983 void
2984 xtermclear(int col1, int row1, int col2, int row2) {
2985 XftDrawRect(xw.draw,
2986 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2987 borderpx + col1 * xw.cw,
2988 borderpx + row1 * xw.ch,
2989 (col2-col1+1) * xw.cw,
2990 (row2-row1+1) * xw.ch);
2991 }
2992
2993 /*
2994 * Absolute coordinates.
2995 */
2996 void
2997 xclear(int x1, int y1, int x2, int y2) {
2998 XftDrawRect(xw.draw,
2999 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
3000 x1, y1, x2-x1, y2-y1);
3001 }
3002
3003 void
3004 xhints(void) {
3005 XClassHint class = {opt_class ? opt_class : termname, termname};
3006 XWMHints wm = {.flags = InputHint, .input = 1};
3007 XSizeHints *sizeh = NULL;
3008
3009 sizeh = XAllocSizeHints();
3010
3011 sizeh->flags = PSize | PResizeInc | PBaseSize;
3012 sizeh->height = xw.h;
3013 sizeh->width = xw.w;
3014 sizeh->height_inc = xw.ch;
3015 sizeh->width_inc = xw.cw;
3016 sizeh->base_height = 2 * borderpx;
3017 sizeh->base_width = 2 * borderpx;
3018 if(xw.isfixed == True) {
3019 sizeh->flags |= PMaxSize | PMinSize;
3020 sizeh->min_width = sizeh->max_width = xw.w;
3021 sizeh->min_height = sizeh->max_height = xw.h;
3022 }
3023 if(xw.gm & (XValue|YValue)) {
3024 sizeh->flags |= USPosition | PWinGravity;
3025 sizeh->x = xw.l;
3026 sizeh->y = xw.t;
3027 sizeh->win_gravity = xgeommasktogravity(xw.gm);
3028 }
3029
3030 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
3031 &class);
3032 XFree(sizeh);
3033 }
3034
3035 int
3036 xgeommasktogravity(int mask) {
3037 switch(mask & (XNegative|YNegative)) {
3038 case 0:
3039 return NorthWestGravity;
3040 case XNegative:
3041 return NorthEastGravity;
3042 case YNegative:
3043 return SouthWestGravity;
3044 }
3045 return SouthEastGravity;
3046 }
3047
3048 int
3049 xloadfont(Font *f, FcPattern *pattern) {
3050 FcPattern *match;
3051 FcResult result;
3052
3053 match = FcFontMatch(NULL, pattern, &result);
3054 if(!match)
3055 return 1;
3056
3057 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
3058 FcPatternDestroy(match);
3059 return 1;
3060 }
3061
3062 f->set = NULL;
3063 f->pattern = FcPatternDuplicate(pattern);
3064
3065 f->ascent = f->match->ascent;
3066 f->descent = f->match->descent;
3067 f->lbearing = 0;
3068 f->rbearing = f->match->max_advance_width;
3069
3070 f->height = f->ascent + f->descent;
3071 f->width = f->lbearing + f->rbearing;
3072
3073 return 0;
3074 }
3075
3076 void
3077 xloadfonts(char *fontstr, double fontsize) {
3078 FcPattern *pattern;
3079 FcResult r_sz, r_psz;
3080 double fontval;
3081 float ceilf(float);
3082
3083 if(fontstr[0] == '-') {
3084 pattern = XftXlfdParse(fontstr, False, False);
3085 } else {
3086 pattern = FcNameParse((FcChar8 *)fontstr);
3087 }
3088
3089 if(!pattern)
3090 die("st: can't open font %s\n", fontstr);
3091
3092 if(fontsize > 1) {
3093 FcPatternDel(pattern, FC_PIXEL_SIZE);
3094 FcPatternDel(pattern, FC_SIZE);
3095 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
3096 usedfontsize = fontsize;
3097 } else {
3098 r_psz = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
3099 r_sz = FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval);
3100 if(r_psz == FcResultMatch) {
3101 usedfontsize = fontval;
3102 } else if(r_sz == FcResultMatch) {
3103 usedfontsize = -1;
3104 } else {
3105 /*
3106 * Default font size is 12, if none given. This is to
3107 * have a known usedfontsize value.
3108 */
3109 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
3110 usedfontsize = 12;
3111 }
3112 defaultfontsize = usedfontsize;
3113 }
3114
3115 FcConfigSubstitute(0, pattern, FcMatchPattern);
3116 FcDefaultSubstitute(pattern);
3117
3118 if(xloadfont(&dc.font, pattern))
3119 die("st: can't open font %s\n", fontstr);
3120
3121 if(usedfontsize < 0) {
3122 FcPatternGetDouble(dc.font.match->pattern,
3123 FC_PIXEL_SIZE, 0, &fontval);
3124 usedfontsize = fontval;
3125 if(fontsize == 0)
3126 defaultfontsize = fontval;
3127 }
3128
3129 /* Setting character width and height. */
3130 xw.cw = ceilf(dc.font.width * cwscale);
3131 xw.ch = ceilf(dc.font.height * chscale);
3132
3133 FcPatternDel(pattern, FC_SLANT);
3134 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
3135 if(xloadfont(&dc.ifont, pattern))
3136 die("st: can't open font %s\n", fontstr);
3137
3138 FcPatternDel(pattern, FC_WEIGHT);
3139 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
3140 if(xloadfont(&dc.ibfont, pattern))
3141 die("st: can't open font %s\n", fontstr);
3142
3143 FcPatternDel(pattern, FC_SLANT);
3144 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
3145 if(xloadfont(&dc.bfont, pattern))
3146 die("st: can't open font %s\n", fontstr);
3147
3148 FcPatternDestroy(pattern);
3149 }
3150
3151 void
3152 xunloadfont(Font *f) {
3153 XftFontClose(xw.dpy, f->match);
3154 FcPatternDestroy(f->pattern);
3155 if(f->set)
3156 FcFontSetDestroy(f->set);
3157 }
3158
3159 void
3160 xunloadfonts(void) {
3161 /* Free the loaded fonts in the font cache. */
3162 while(frclen > 0)
3163 XftFontClose(xw.dpy, frc[--frclen].font);
3164
3165 xunloadfont(&dc.font);
3166 xunloadfont(&dc.bfont);
3167 xunloadfont(&dc.ifont);
3168 xunloadfont(&dc.ibfont);
3169 }
3170
3171 void
3172 xzoom(const Arg *arg) {
3173 Arg larg;
3174
3175 larg.i = usedfontsize + arg->i;
3176 xzoomabs(&larg);
3177 }
3178
3179 void
3180 xzoomabs(const Arg *arg) {
3181 xunloadfonts();
3182 xloadfonts(usedfont, arg->i);
3183 cresize(0, 0);
3184 redraw();
3185 xhints();
3186 }
3187
3188 void
3189 xzoomreset(const Arg *arg) {
3190 Arg larg;
3191
3192 if(defaultfontsize > 0) {
3193 larg.i = defaultfontsize;
3194 xzoomabs(&larg);
3195 }
3196 }
3197
3198 void
3199 xinit(void) {
3200 XGCValues gcvalues;
3201 Cursor cursor;
3202 Window parent;
3203 pid_t thispid = getpid();
3204
3205 if(!(xw.dpy = XOpenDisplay(NULL)))
3206 die("Can't open display\n");
3207 xw.scr = XDefaultScreen(xw.dpy);
3208 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
3209
3210 /* font */
3211 if(!FcInit())
3212 die("Could not init fontconfig.\n");
3213
3214 usedfont = (opt_font == NULL)? font : opt_font;
3215 xloadfonts(usedfont, 0);
3216
3217 /* colors */
3218 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
3219 xloadcols();
3220
3221 /* adjust fixed window geometry */
3222 xw.w = 2 * borderpx + term.col * xw.cw;
3223 xw.h = 2 * borderpx + term.row * xw.ch;
3224 if(xw.gm & XNegative)
3225 xw.l += DisplayWidth(xw.dpy, xw.scr) - xw.w - 2;
3226 if(xw.gm & YNegative)
3227 xw.t += DisplayWidth(xw.dpy, xw.scr) - xw.h - 2;
3228
3229 /* Events */
3230 xw.attrs.background_pixel = dc.col[defaultbg].pixel;
3231 xw.attrs.border_pixel = dc.col[defaultbg].pixel;
3232 xw.attrs.bit_gravity = NorthWestGravity;
3233 xw.attrs.event_mask = FocusChangeMask | KeyPressMask
3234 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
3235 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
3236 xw.attrs.colormap = xw.cmap;
3237
3238 if (!(opt_embed && (parent = strtol(opt_embed, NULL, 0))))
3239 parent = XRootWindow(xw.dpy, xw.scr);
3240 xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
3241 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
3242 xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
3243 | CWEventMask | CWColormap, &xw.attrs);
3244
3245 memset(&gcvalues, 0, sizeof(gcvalues));
3246 gcvalues.graphics_exposures = False;
3247 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
3248 &gcvalues);
3249 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
3250 DefaultDepth(xw.dpy, xw.scr));
3251 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
3252 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
3253
3254 /* Xft rendering context */
3255 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
3256
3257 /* input methods */
3258 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3259 XSetLocaleModifiers("@im=local");
3260 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3261 XSetLocaleModifiers("@im=");
3262 if((xw.xim = XOpenIM(xw.dpy,
3263 NULL, NULL, NULL)) == NULL) {
3264 die("XOpenIM failed. Could not open input"
3265 " device.\n");
3266 }
3267 }
3268 }
3269 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
3270 | XIMStatusNothing, XNClientWindow, xw.win,
3271 XNFocusWindow, xw.win, NULL);
3272 if(xw.xic == NULL)
3273 die("XCreateIC failed. Could not obtain input method.\n");
3274
3275 /* white cursor, black outline */
3276 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
3277 XDefineCursor(xw.dpy, xw.win, cursor);
3278 XRecolorCursor(xw.dpy, cursor,
3279 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
3280 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
3281
3282 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
3283 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
3284 xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
3285 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
3286
3287 xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
3288 XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
3289 PropModeReplace, (uchar *)&thispid, 1);
3290
3291 xresettitle();
3292 XMapWindow(xw.dpy, xw.win);
3293 xhints();
3294 XSync(xw.dpy, False);
3295 }
3296
3297 void
3298 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
3299 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
3300 width = charlen * xw.cw, xp, i;
3301 int frcflags, charexists;
3302 int u8fl, u8fblen, u8cblen, doesexist;
3303 char *u8c, *u8fs;
3304 long unicodep;
3305 Font *font = &dc.font;
3306 FcResult fcres;
3307 FcPattern *fcpattern, *fontpattern;
3308 FcFontSet *fcsets[] = { NULL };
3309 FcCharSet *fccharset;
3310 Color *fg, *bg, *temp, revfg, revbg, truefg, truebg;
3311 XRenderColor colfg, colbg;
3312 XRectangle r;
3313 int oneatatime;
3314
3315 frcflags = FRC_NORMAL;
3316
3317 if(base.mode & ATTR_ITALIC) {
3318 if(base.fg == defaultfg)
3319 base.fg = defaultitalic;
3320 font = &dc.ifont;
3321 frcflags = FRC_ITALIC;
3322 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
3323 if(base.fg == defaultfg)
3324 base.fg = defaultitalic;
3325 font = &dc.ibfont;
3326 frcflags = FRC_ITALICBOLD;
3327 } else if(base.mode & ATTR_UNDERLINE) {
3328 if(base.fg == defaultfg)
3329 base.fg = defaultunderline;
3330 }
3331
3332 if(IS_TRUECOL(base.fg)) {
3333 colfg.alpha = 0xffff;
3334 colfg.red = TRUERED(base.fg);
3335 colfg.green = TRUEGREEN(base.fg);
3336 colfg.blue = TRUEBLUE(base.fg);
3337 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
3338 fg = &truefg;
3339 } else {
3340 fg = &dc.col[base.fg];
3341 }
3342
3343 if(IS_TRUECOL(base.bg)) {
3344 colbg.alpha = 0xffff;
3345 colbg.green = TRUEGREEN(base.bg);
3346 colbg.red = TRUERED(base.bg);
3347 colbg.blue = TRUEBLUE(base.bg);
3348 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
3349 bg = &truebg;
3350 } else {
3351 bg = &dc.col[base.bg];
3352 }
3353
3354 if(base.mode & ATTR_BOLD) {
3355 /*
3356 * change basic system colors [0-7]
3357 * to bright system colors [8-15]
3358 */
3359 if(BETWEEN(base.fg, 0, 7) && !(base.mode & ATTR_FAINT))
3360 fg = &dc.col[base.fg + 8];
3361
3362 if(base.mode & ATTR_ITALIC) {
3363 font = &dc.ibfont;
3364 frcflags = FRC_ITALICBOLD;
3365 } else {
3366 font = &dc.bfont;
3367 frcflags = FRC_BOLD;
3368 }
3369 }
3370
3371 if(IS_SET(MODE_REVERSE)) {
3372 if(fg == &dc.col[defaultfg]) {
3373 fg = &dc.col[defaultbg];
3374 } else {
3375 colfg.red = ~fg->color.red;
3376 colfg.green = ~fg->color.green;
3377 colfg.blue = ~fg->color.blue;
3378 colfg.alpha = fg->color.alpha;
3379 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
3380 &revfg);
3381 fg = &revfg;
3382 }
3383
3384 if(bg == &dc.col[defaultbg]) {
3385 bg = &dc.col[defaultfg];
3386 } else {
3387 colbg.red = ~bg->color.red;
3388 colbg.green = ~bg->color.green;
3389 colbg.blue = ~bg->color.blue;
3390 colbg.alpha = bg->color.alpha;
3391 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
3392 &revbg);
3393 bg = &revbg;
3394 }
3395 }
3396
3397 if(base.mode & ATTR_REVERSE) {
3398 temp = fg;
3399 fg = bg;
3400 bg = temp;
3401 }
3402
3403 if(base.mode & ATTR_FAINT && !(base.mode & ATTR_BOLD)) {
3404 colfg.red = fg->color.red / 2;
3405 colfg.green = fg->color.green / 2;
3406 colfg.blue = fg->color.blue / 2;
3407 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
3408 fg = &revfg;
3409 }
3410
3411 if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
3412 fg = bg;
3413
3414 if(base.mode & ATTR_INVISIBLE)
3415 fg = bg;
3416
3417 /* Intelligent cleaning up of the borders. */
3418 if(x == 0) {
3419 xclear(0, (y == 0)? 0 : winy, borderpx,
3420 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
3421 }
3422 if(x + charlen >= term.col) {
3423 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
3424 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
3425 }
3426 if(y == 0)
3427 xclear(winx, 0, winx + width, borderpx);
3428 if(y == term.row-1)
3429 xclear(winx, winy + xw.ch, winx + width, xw.h);
3430
3431 /* Clean up the region we want to draw to. */
3432 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
3433
3434 /* Set the clip region because Xft is sometimes dirty. */
3435 r.x = 0;
3436 r.y = 0;
3437 r.height = xw.ch;
3438 r.width = width;
3439 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
3440
3441 for(xp = winx; bytelen > 0;) {
3442 /*
3443 * Search for the range in the to be printed string of glyphs
3444 * that are in the main font. Then print that range. If
3445 * some glyph is found that is not in the font, do the
3446 * fallback dance.
3447 */
3448 u8fs = s;
3449 u8fblen = 0;
3450 u8fl = 0;
3451 oneatatime = font->width != xw.cw;
3452 for(;;) {
3453 u8c = s;
3454 u8cblen = utf8decode(s, &unicodep, UTF_SIZ);
3455 s += u8cblen;
3456 bytelen -= u8cblen;
3457
3458 doesexist = XftCharExists(xw.dpy, font->match, unicodep);
3459 if(doesexist) {
3460 u8fl++;
3461 u8fblen += u8cblen;
3462 if(!oneatatime && bytelen > 0)
3463 continue;
3464 }
3465
3466 if(u8fl > 0) {
3467 XftDrawStringUtf8(xw.draw, fg,
3468 font->match, xp,
3469 winy + font->ascent,
3470 (FcChar8 *)u8fs,
3471 u8fblen);
3472 xp += xw.cw * u8fl;
3473 }
3474 break;
3475 }
3476 if(doesexist) {
3477 if(oneatatime)
3478 continue;
3479 break;
3480 }
3481
3482 /* Search the font cache. */
3483 for(i = 0; i < frclen; i++) {
3484 charexists = XftCharExists(xw.dpy, frc[i].font, unicodep);
3485 /* Everything correct. */
3486 if(charexists && frc[i].flags == frcflags)
3487 break;
3488 /* We got a default font for a not found glyph. */
3489 if(!charexists && frc[i].flags == frcflags \
3490 && frc[i].unicodep == unicodep) {
3491 break;
3492 }
3493 }
3494
3495 /* Nothing was found. */
3496 if(i >= frclen) {
3497 if(!font->set)
3498 font->set = FcFontSort(0, font->pattern,
3499 FcTrue, 0, &fcres);
3500 fcsets[0] = font->set;
3501
3502 /*
3503 * Nothing was found in the cache. Now use
3504 * some dozen of Fontconfig calls to get the
3505 * font for one single character.
3506 *
3507 * Xft and fontconfig are design failures.
3508 */
3509 fcpattern = FcPatternDuplicate(font->pattern);
3510 fccharset = FcCharSetCreate();
3511
3512 FcCharSetAddChar(fccharset, unicodep);
3513 FcPatternAddCharSet(fcpattern, FC_CHARSET,
3514 fccharset);
3515 FcPatternAddBool(fcpattern, FC_SCALABLE,
3516 FcTrue);
3517
3518 FcConfigSubstitute(0, fcpattern,
3519 FcMatchPattern);
3520 FcDefaultSubstitute(fcpattern);
3521
3522 fontpattern = FcFontSetMatch(0, fcsets, 1,
3523 fcpattern, &fcres);
3524
3525 /*
3526 * Overwrite or create the new cache entry.
3527 */
3528 if(frclen >= LEN(frc)) {
3529 frclen = LEN(frc) - 1;
3530 XftFontClose(xw.dpy, frc[frclen].font);
3531 frc[frclen].unicodep = 0;
3532 }
3533
3534 frc[frclen].font = XftFontOpenPattern(xw.dpy,
3535 fontpattern);
3536 frc[frclen].flags = frcflags;
3537 frc[frclen].unicodep = unicodep;
3538
3539 i = frclen;
3540 frclen++;
3541
3542 FcPatternDestroy(fcpattern);
3543 FcCharSetDestroy(fccharset);
3544 }
3545
3546 XftDrawStringUtf8(xw.draw, fg, frc[i].font,
3547 xp, winy + frc[i].font->ascent,
3548 (FcChar8 *)u8c, u8cblen);
3549
3550 xp += xw.cw * wcwidth(unicodep);
3551 }
3552
3553 /*
3554 * This is how the loop above actually should be. Why does the
3555 * application have to care about font details?
3556 *
3557 * I have to repeat: Xft and Fontconfig are design failures.
3558 */
3559 /*
3560 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
3561 winy + font->ascent, (FcChar8 *)s, bytelen);
3562 */
3563
3564 if(base.mode & ATTR_UNDERLINE) {
3565 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
3566 width, 1);
3567 }
3568
3569 if(base.mode & ATTR_STRUCK) {
3570 XftDrawRect(xw.draw, fg, winx, winy + 2 * font->ascent / 3,
3571 width, 1);
3572 }
3573
3574 /* Reset clip to none. */
3575 XftDrawSetClip(xw.draw, 0);
3576 }
3577
3578 void
3579 xdrawcursor(void) {
3580 static int oldx = 0, oldy = 0;
3581 int sl, width, curx;
3582 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
3583
3584 LIMIT(oldx, 0, term.col-1);
3585 LIMIT(oldy, 0, term.row-1);
3586
3587 curx = term.c.x;
3588
3589 /* adjust position if in dummy */
3590 if(term.line[oldy][oldx].mode & ATTR_WDUMMY)
3591 oldx--;
3592 if(term.line[term.c.y][curx].mode & ATTR_WDUMMY)
3593 curx--;
3594
3595 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
3596
3597 /* remove the old cursor */
3598 sl = utf8len(term.line[oldy][oldx].c);
3599 width = (term.line[oldy][oldx].mode & ATTR_WIDE)? 2 : 1;
3600 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
3601 oldy, width, sl);
3602
3603 if(IS_SET(MODE_HIDE))
3604 return;
3605
3606 /* draw the new one */
3607 if(xw.state & WIN_FOCUSED) {
3608 switch (xw.cursor) {
3609 case 0: /* Blinking Block */
3610 case 1: /* Blinking Block (Default) */
3611 case 2: /* Steady Block */
3612 if(IS_SET(MODE_REVERSE)) {
3613 g.mode |= ATTR_REVERSE;
3614 g.fg = defaultcs;
3615 g.bg = defaultfg;
3616 }
3617
3618 sl = utf8len(g.c);
3619 width = (term.line[term.c.y][curx].mode & ATTR_WIDE)\
3620 ? 2 : 1;
3621 xdraws(g.c, g, term.c.x, term.c.y, width, sl);
3622 break;
3623 case 3: /* Blinking Underline */
3624 case 4: /* Steady Underline */
3625 XftDrawRect(xw.draw, &dc.col[defaultcs],
3626 borderpx + curx * xw.cw,
3627 borderpx + (term.c.y + 1) * xw.ch - cursorthickness,
3628 xw.cw, cursorthickness);
3629 break;
3630 case 5: /* Blinking bar */
3631 case 6: /* Steady bar */
3632 XftDrawRect(xw.draw, &dc.col[defaultcs],
3633 borderpx + curx * xw.cw,
3634 borderpx + term.c.y * xw.ch,
3635 cursorthickness, xw.ch);
3636 break;
3637 }
3638 } else {
3639 XftDrawRect(xw.draw, &dc.col[defaultcs],
3640 borderpx + curx * xw.cw,
3641 borderpx + term.c.y * xw.ch,
3642 xw.cw - 1, 1);
3643 XftDrawRect(xw.draw, &dc.col[defaultcs],
3644 borderpx + curx * xw.cw,
3645 borderpx + term.c.y * xw.ch,
3646 1, xw.ch - 1);
3647 XftDrawRect(xw.draw, &dc.col[defaultcs],
3648 borderpx + (curx + 1) * xw.cw - 1,
3649 borderpx + term.c.y * xw.ch,
3650 1, xw.ch - 1);
3651 XftDrawRect(xw.draw, &dc.col[defaultcs],
3652 borderpx + curx * xw.cw,
3653 borderpx + (term.c.y + 1) * xw.ch - 1,
3654 xw.cw, 1);
3655 }
3656 oldx = curx, oldy = term.c.y;
3657 }
3658
3659
3660 void
3661 xsettitle(char *p) {
3662 XTextProperty prop;
3663
3664 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3665 &prop);
3666 XSetWMName(xw.dpy, xw.win, &prop);
3667 XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
3668 XFree(prop.value);
3669 }
3670
3671 void
3672 xresettitle(void) {
3673 xsettitle(opt_title ? opt_title : "st");
3674 }
3675
3676 void
3677 redraw(void) {
3678 tfulldirt();
3679 draw();
3680 }
3681
3682 void
3683 draw(void) {
3684 drawregion(0, 0, term.col, term.row);
3685 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3686 xw.h, 0, 0);
3687 XSetForeground(xw.dpy, dc.gc,
3688 dc.col[IS_SET(MODE_REVERSE)?
3689 defaultfg : defaultbg].pixel);
3690 }
3691
3692 void
3693 drawregion(int x1, int y1, int x2, int y2) {
3694 int ic, ib, x, y, ox, sl;
3695 Glyph base, new;
3696 char buf[DRAW_BUF_SIZ];
3697 bool ena_sel = sel.ob.x != -1 && sel.alt == IS_SET(MODE_ALTSCREEN);
3698 long unicodep;
3699
3700 if(!(xw.state & WIN_VISIBLE))
3701 return;
3702
3703 for(y = y1; y < y2; y++) {
3704 if(!term.dirty[y])
3705 continue;
3706
3707 xtermclear(0, y, term.col, y);
3708 term.dirty[y] = 0;
3709 base = term.line[y][0];
3710 ic = ib = ox = 0;
3711 for(x = x1; x < x2; x++) {
3712 new = term.line[y][x];
3713 if(new.mode == ATTR_WDUMMY)
3714 continue;
3715 if(ena_sel && selected(x, y))
3716 new.mode ^= ATTR_REVERSE;
3717 if(ib > 0 && (ATTRCMP(base, new)
3718 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3719 xdraws(buf, base, ox, y, ic, ib);
3720 ic = ib = 0;
3721 }
3722 if(ib == 0) {
3723 ox = x;
3724 base = new;
3725 }
3726
3727 sl = utf8decode(new.c, &unicodep, UTF_SIZ);
3728 memcpy(buf+ib, new.c, sl);
3729 ib += sl;
3730 ic += (new.mode & ATTR_WIDE)? 2 : 1;
3731 }
3732 if(ib > 0)
3733 xdraws(buf, base, ox, y, ic, ib);
3734 }
3735 xdrawcursor();
3736 }
3737
3738 void
3739 expose(XEvent *ev) {
3740 redraw();
3741 }
3742
3743 void
3744 visibility(XEvent *ev) {
3745 XVisibilityEvent *e = &ev->xvisibility;
3746
3747 MODBIT(xw.state, e->state != VisibilityFullyObscured, WIN_VISIBLE);
3748 }
3749
3750 void
3751 unmap(XEvent *ev) {
3752 xw.state &= ~WIN_VISIBLE;
3753 }
3754
3755 void
3756 xsetpointermotion(int set) {
3757 MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
3758 XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
3759 }
3760
3761 void
3762 xseturgency(int add) {
3763 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3764
3765 MODBIT(h->flags, add, XUrgencyHint);
3766 XSetWMHints(xw.dpy, xw.win, h);
3767 XFree(h);
3768 }
3769
3770 void
3771 focus(XEvent *ev) {
3772 XFocusChangeEvent *e = &ev->xfocus;
3773
3774 if(e->mode == NotifyGrab)
3775 return;
3776
3777 if(ev->type == FocusIn) {
3778 XSetICFocus(xw.xic);
3779 xw.state |= WIN_FOCUSED;
3780 xseturgency(0);
3781 if(IS_SET(MODE_FOCUS))
3782 ttywrite("\033[I", 3);
3783 } else {
3784 XUnsetICFocus(xw.xic);
3785 xw.state &= ~WIN_FOCUSED;
3786 if(IS_SET(MODE_FOCUS))
3787 ttywrite("\033[O", 3);
3788 }
3789 }
3790
3791 bool
3792 match(uint mask, uint state) {
3793 return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
3794 }
3795
3796 void
3797 numlock(const Arg *dummy) {
3798 term.numlock ^= 1;
3799 }
3800
3801 char*
3802 kmap(KeySym k, uint state) {
3803 Key *kp;
3804 int i;
3805
3806 /* Check for mapped keys out of X11 function keys. */
3807 for(i = 0; i < LEN(mappedkeys); i++) {
3808 if(mappedkeys[i] == k)
3809 break;
3810 }
3811 if(i == LEN(mappedkeys)) {
3812 if((k & 0xFFFF) < 0xFD00)
3813 return NULL;
3814 }
3815
3816 for(kp = key; kp < key + LEN(key); kp++) {
3817 if(kp->k != k)
3818 continue;
3819
3820 if(!match(kp->mask, state))
3821 continue;
3822
3823 if(IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
3824 continue;
3825 if(term.numlock && kp->appkey == 2)
3826 continue;
3827
3828 if(IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
3829 continue;
3830
3831 if(IS_SET(MODE_CRLF) ? kp->crlf < 0 : kp->crlf > 0)
3832 continue;
3833
3834 return kp->s;
3835 }
3836
3837 return NULL;
3838 }
3839
3840 void
3841 kpress(XEvent *ev) {
3842 XKeyEvent *e = &ev->xkey;
3843 KeySym ksym;
3844 char buf[32], *customkey;
3845 int len;
3846 long c;
3847 Status status;
3848 Shortcut *bp;
3849
3850 if(IS_SET(MODE_KBDLOCK))
3851 return;
3852
3853 len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
3854 /* 1. shortcuts */
3855 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3856 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3857 bp->func(&(bp->arg));
3858 return;
3859 }
3860 }
3861
3862 /* 2. custom keys from config.h */
3863 if((customkey = kmap(ksym, e->state))) {
3864 ttysend(customkey, strlen(customkey));
3865 return;
3866 }
3867
3868 /* 3. composed string from input method */
3869 if(len == 0)
3870 return;
3871 if(len == 1 && e->state & Mod1Mask) {
3872 if(IS_SET(MODE_8BIT)) {
3873 if(*buf < 0177) {
3874 c = *buf | 0x80;
3875 len = utf8encode(c, buf, UTF_SIZ);
3876 }
3877 } else {
3878 buf[1] = buf[0];
3879 buf[0] = '\033';
3880 len = 2;
3881 }
3882 }
3883 ttysend(buf, len);
3884 }
3885
3886
3887 void
3888 cmessage(XEvent *e) {
3889 /*
3890 * See xembed specs
3891 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3892 */
3893 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3894 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3895 xw.state |= WIN_FOCUSED;
3896 xseturgency(0);
3897 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3898 xw.state &= ~WIN_FOCUSED;
3899 }
3900 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3901 /* Send SIGHUP to shell */
3902 kill(pid, SIGHUP);
3903 exit(EXIT_SUCCESS);
3904 }
3905 }
3906
3907 void
3908 cresize(int width, int height) {
3909 int col, row;
3910
3911 if(width != 0)
3912 xw.w = width;
3913 if(height != 0)
3914 xw.h = height;
3915
3916 col = (xw.w - 2 * borderpx) / xw.cw;
3917 row = (xw.h - 2 * borderpx) / xw.ch;
3918
3919 tresize(col, row);
3920 xresize(col, row);
3921 ttyresize();
3922 }
3923
3924 void
3925 resize(XEvent *e) {
3926 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3927 return;
3928
3929 cresize(e->xconfigure.width, e->xconfigure.height);
3930 }
3931
3932 void
3933 run(void) {
3934 XEvent ev;
3935 int w = xw.w, h = xw.h;
3936 fd_set rfd;
3937 int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3938 struct timespec drawtimeout, *tv = NULL, now, last, lastblink;
3939 long deltatime;
3940
3941 /* Waiting for window mapping */
3942 do {
3943 XNextEvent(xw.dpy, &ev);
3944 if(ev.type == ConfigureNotify) {
3945 w = ev.xconfigure.width;
3946 h = ev.xconfigure.height;
3947 }
3948 } while(ev.type != MapNotify);
3949
3950 ttynew();
3951 cresize(w, h);
3952
3953 clock_gettime(CLOCK_MONOTONIC, &last);
3954 lastblink = last;
3955
3956 for(xev = actionfps;;) {
3957 FD_ZERO(&rfd);
3958 FD_SET(cmdfd, &rfd);
3959 FD_SET(xfd, &rfd);
3960
3961 if(pselect(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv, NULL) < 0) {
3962 if(errno == EINTR)
3963 continue;
3964 die("select failed: %s\n", strerror(errno));
3965 }
3966 if(FD_ISSET(cmdfd, &rfd)) {
3967 ttyread();
3968 if(blinktimeout) {
3969 blinkset = tattrset(ATTR_BLINK);
3970 if(!blinkset)
3971 MODBIT(term.mode, 0, MODE_BLINK);
3972 }
3973 }
3974
3975 if(FD_ISSET(xfd, &rfd))
3976 xev = actionfps;
3977
3978 clock_gettime(CLOCK_MONOTONIC, &now);
3979 drawtimeout.tv_sec = 0;
3980 drawtimeout.tv_nsec = (1000 * 1E6)/ xfps;
3981 tv = &drawtimeout;
3982
3983 dodraw = 0;
3984 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
3985 tsetdirtattr(ATTR_BLINK);
3986 term.mode ^= MODE_BLINK;
3987 lastblink = now;
3988 dodraw = 1;
3989 }
3990 deltatime = TIMEDIFF(now, last);
3991 if(deltatime > 1000 / (xev ? xfps : actionfps)) {
3992 dodraw = 1;
3993 last = now;
3994 }
3995
3996 if(dodraw) {
3997 while(XPending(xw.dpy)) {
3998 XNextEvent(xw.dpy, &ev);
3999 if(XFilterEvent(&ev, None))
4000 continue;
4001 if(handler[ev.type])
4002 (handler[ev.type])(&ev);
4003 }
4004
4005 draw();
4006 XFlush(xw.dpy);
4007
4008 if(xev && !FD_ISSET(xfd, &rfd))
4009 xev--;
4010 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
4011 if(blinkset) {
4012 if(TIMEDIFF(now, lastblink) \
4013 > blinktimeout) {
4014 drawtimeout.tv_nsec = 1000;
4015 } else {
4016 drawtimeout.tv_nsec = (1E6 * \
4017 (blinktimeout - \
4018 TIMEDIFF(now,
4019 lastblink)));
4020 }
4021 drawtimeout.tv_sec = \
4022 drawtimeout.tv_nsec / 1E9;
4023 drawtimeout.tv_nsec %= (long)1E9;
4024 } else {
4025 tv = NULL;
4026 }
4027 }
4028 }
4029 }
4030 }
4031
4032 void
4033 usage(void) {
4034 die("%s " VERSION " (c) 2010-2015 st engineers\n"
4035 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]\n"
4036 " [-i] [-t title] [-w windowid] [-e command ...] [command ...]\n"
4037 " st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]\n"
4038 " [-i] [-t title] [-w windowid] [-l line] [stty_args ...]\n",
4039 argv0);
4040 }
4041
4042 int
4043 main(int argc, char *argv[]) {
4044 uint cols = 80, rows = 24;
4045
4046 xw.l = xw.t = 0;
4047 xw.isfixed = False;
4048 xw.cursor = 0;
4049
4050 ARGBEGIN {
4051 case 'a':
4052 allowaltscreen = false;
4053 break;
4054 case 'c':
4055 opt_class = EARGF(usage());
4056 break;
4057 case 'e':
4058 if(argc > 1)
4059 --argc, ++argv;
4060 goto run;
4061 case 'f':
4062 opt_font = EARGF(usage());
4063 break;
4064 case 'g':
4065 xw.gm = XParseGeometry(EARGF(usage()),
4066 &xw.l, &xw.t, &cols, &rows);
4067 break;
4068 case 'i':
4069 xw.isfixed = True;
4070 break;
4071 case 'o':
4072 opt_io = EARGF(usage());
4073 break;
4074 case 'l':
4075 opt_line = EARGF(usage());
4076 break;
4077 case 't':
4078 opt_title = EARGF(usage());
4079 break;
4080 case 'w':
4081 opt_embed = EARGF(usage());
4082 break;
4083 case 'v':
4084 default:
4085 usage();
4086 } ARGEND;
4087
4088 run:
4089 if(argc > 0) {
4090 /* eat all remaining arguments */
4091 opt_cmd = argv;
4092 if(!opt_title && !opt_line)
4093 opt_title = basename(xstrdup(argv[0]));
4094 }
4095 setlocale(LC_CTYPE, "");
4096 XSetLocaleModifiers("");
4097 tnew(MAX(cols, 1), MAX(rows, 1));
4098 xinit();
4099 selinit();
4100 run();
4101
4102 return 0;
4103 }
4104