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