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Support the DECSCUSR CSI escape sequence
[st.git] / st.c
1 /* See LICENSE for licence details. */
2 #include <ctype.h>
3 #include <errno.h>
4 #include <fcntl.h>
5 #include <limits.h>
6 #include <locale.h>
7 #include <pwd.h>
8 #include <stdarg.h>
9 #include <stdbool.h>
10 #include <stdio.h>
11 #include <stdlib.h>
12 #include <string.h>
13 #include <signal.h>
14 #include <stdint.h>
15 #include <sys/ioctl.h>
16 #include <sys/select.h>
17 #include <sys/stat.h>
18 #include <sys/time.h>
19 #include <sys/types.h>
20 #include <sys/wait.h>
21 #include <time.h>
22 #include <unistd.h>
23 #include <libgen.h>
24 #include <X11/Xatom.h>
25 #include <X11/Xlib.h>
26 #include <X11/Xutil.h>
27 #include <X11/cursorfont.h>
28 #include <X11/keysym.h>
29 #include <X11/Xft/Xft.h>
30 #include <X11/XKBlib.h>
31 #include <fontconfig/fontconfig.h>
32 #include <wchar.h>
33
34 #include "arg.h"
35
36 char *argv0;
37
38 #define Glyph Glyph_
39 #define Font Font_
40
41 #if defined(__linux)
42 #include <pty.h>
43 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
44 #include <util.h>
45 #elif defined(__FreeBSD__) || defined(__DragonFly__)
46 #include <libutil.h>
47 #endif
48
49
50 /* XEMBED messages */
51 #define XEMBED_FOCUS_IN 4
52 #define XEMBED_FOCUS_OUT 5
53
54 /* Arbitrary sizes */
55 #define UTF_INVALID 0xFFFD
56 #define UTF_SIZ 4
57 #define ESC_BUF_SIZ (128*UTF_SIZ)
58 #define ESC_ARG_SIZ 16
59 #define STR_BUF_SIZ ESC_BUF_SIZ
60 #define STR_ARG_SIZ ESC_ARG_SIZ
61 #define DRAW_BUF_SIZ 20*1024
62 #define XK_ANY_MOD UINT_MAX
63 #define XK_NO_MOD 0
64 #define XK_SWITCH_MOD (1<<13)
65
66 /* macros */
67 #define MIN(a, b) ((a) < (b) ? (a) : (b))
68 #define MAX(a, b) ((a) < (b) ? (b) : (a))
69 #define LEN(a) (sizeof(a) / sizeof(a)[0])
70 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
71 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
72 #define ISCONTROLC0(c) (BETWEEN(c, 0, 0x1f) || (c) == '\177')
73 #define ISCONTROLC1(c) (BETWEEN(c, 0x80, 0x9f))
74 #define ISCONTROL(c) (ISCONTROLC0(c) || ISCONTROLC1(c))
75 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
76 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
77 #define IS_SET(flag) ((term.mode & (flag)) != 0)
78 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_nsec-t2.tv_nsec)/1E6)
79 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
80
81 #define TRUECOLOR(r,g,b) (1 << 24 | (r) << 16 | (g) << 8 | (b))
82 #define IS_TRUECOL(x) (1 << 24 & (x))
83 #define TRUERED(x) (((x) & 0xff0000) >> 8)
84 #define TRUEGREEN(x) (((x) & 0xff00))
85 #define TRUEBLUE(x) (((x) & 0xff) << 8)
86
87
88 enum glyph_attribute {
89 ATTR_NULL = 0,
90 ATTR_BOLD = 1 << 0,
91 ATTR_FAINT = 1 << 1,
92 ATTR_ITALIC = 1 << 2,
93 ATTR_UNDERLINE = 1 << 3,
94 ATTR_BLINK = 1 << 4,
95 ATTR_REVERSE = 1 << 5,
96 ATTR_INVISIBLE = 1 << 6,
97 ATTR_STRUCK = 1 << 7,
98 ATTR_WRAP = 1 << 8,
99 ATTR_WIDE = 1 << 9,
100 ATTR_WDUMMY = 1 << 10,
101 };
102
103 enum cursor_movement {
104 CURSOR_SAVE,
105 CURSOR_LOAD
106 };
107
108 enum cursor_state {
109 CURSOR_DEFAULT = 0,
110 CURSOR_WRAPNEXT = 1,
111 CURSOR_ORIGIN = 2
112 };
113
114 enum term_mode {
115 MODE_WRAP = 1 << 0,
116 MODE_INSERT = 1 << 1,
117 MODE_APPKEYPAD = 1 << 2,
118 MODE_ALTSCREEN = 1 << 3,
119 MODE_CRLF = 1 << 4,
120 MODE_MOUSEBTN = 1 << 5,
121 MODE_MOUSEMOTION = 1 << 6,
122 MODE_REVERSE = 1 << 7,
123 MODE_KBDLOCK = 1 << 8,
124 MODE_HIDE = 1 << 9,
125 MODE_ECHO = 1 << 10,
126 MODE_APPCURSOR = 1 << 11,
127 MODE_MOUSESGR = 1 << 12,
128 MODE_8BIT = 1 << 13,
129 MODE_BLINK = 1 << 14,
130 MODE_FBLINK = 1 << 15,
131 MODE_FOCUS = 1 << 16,
132 MODE_MOUSEX10 = 1 << 17,
133 MODE_MOUSEMANY = 1 << 18,
134 MODE_BRCKTPASTE = 1 << 19,
135 MODE_PRINT = 1 << 20,
136 MODE_MOUSE = MODE_MOUSEBTN|MODE_MOUSEMOTION|MODE_MOUSEX10\
137 |MODE_MOUSEMANY,
138 };
139
140 enum charset {
141 CS_GRAPHIC0,
142 CS_GRAPHIC1,
143 CS_UK,
144 CS_USA,
145 CS_MULTI,
146 CS_GER,
147 CS_FIN
148 };
149
150 enum escape_state {
151 ESC_START = 1,
152 ESC_CSI = 2,
153 ESC_STR = 4, /* DCS, OSC, PM, APC */
154 ESC_ALTCHARSET = 8,
155 ESC_STR_END = 16, /* a final string was encountered */
156 ESC_TEST = 32, /* Enter in test mode */
157 };
158
159 enum window_state {
160 WIN_VISIBLE = 1,
161 WIN_REDRAW = 2,
162 WIN_FOCUSED = 4
163 };
164
165 enum selection_type {
166 SEL_REGULAR = 1,
167 SEL_RECTANGULAR = 2
168 };
169
170 enum selection_snap {
171 SNAP_WORD = 1,
172 SNAP_LINE = 2
173 };
174
175 typedef unsigned char uchar;
176 typedef unsigned int uint;
177 typedef unsigned long ulong;
178 typedef unsigned short ushort;
179
180 typedef XftDraw *Draw;
181 typedef XftColor Color;
182
183 typedef struct {
184 char c[UTF_SIZ]; /* character code */
185 ushort mode; /* attribute flags */
186 uint32_t fg; /* foreground */
187 uint32_t bg; /* background */
188 } Glyph;
189
190 typedef Glyph *Line;
191
192 typedef struct {
193 Glyph attr; /* current char attributes */
194 int x;
195 int y;
196 char state;
197 } TCursor;
198
199 /* CSI Escape sequence structs */
200 /* ESC '[' [[ [<priv>] <arg> [;]] <mode> [<mode>]] */
201 typedef struct {
202 char buf[ESC_BUF_SIZ]; /* raw string */
203 int len; /* raw string length */
204 char priv;
205 int arg[ESC_ARG_SIZ];
206 int narg; /* nb of args */
207 char mode[2];
208 } CSIEscape;
209
210 /* STR Escape sequence structs */
211 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
212 typedef struct {
213 char type; /* ESC type ... */
214 char buf[STR_BUF_SIZ]; /* raw string */
215 int len; /* raw string length */
216 char *args[STR_ARG_SIZ];
217 int narg; /* nb of args */
218 } STREscape;
219
220 /* Internal representation of the screen */
221 typedef struct {
222 int row; /* nb row */
223 int col; /* nb col */
224 Line *line; /* screen */
225 Line *alt; /* alternate screen */
226 bool *dirty; /* dirtyness of lines */
227 TCursor c; /* cursor */
228 int top; /* top scroll limit */
229 int bot; /* bottom scroll limit */
230 int mode; /* terminal mode flags */
231 int esc; /* escape state flags */
232 char trantbl[4]; /* charset table translation */
233 int charset; /* current charset */
234 int icharset; /* selected charset for sequence */
235 bool numlock; /* lock numbers in keyboard */
236 bool *tabs;
237 } Term;
238
239 /* Purely graphic info */
240 typedef struct {
241 Display *dpy;
242 Colormap cmap;
243 Window win;
244 Drawable buf;
245 Atom xembed, wmdeletewin, netwmname, netwmpid;
246 XIM xim;
247 XIC xic;
248 Draw draw;
249 Visual *vis;
250 XSetWindowAttributes attrs;
251 int scr;
252 bool isfixed; /* is fixed geometry? */
253 int l, t; /* left and top offset */
254 int gm; /* geometry mask */
255 int tw, th; /* tty width and height */
256 int w, h; /* window width and height */
257 int ch; /* char height */
258 int cw; /* char width */
259 char state; /* focus, redraw, visible */
260 int cursor; /* cursor style */
261 } XWindow;
262
263 typedef struct {
264 uint b;
265 uint mask;
266 char *s;
267 } Mousekey;
268
269 typedef struct {
270 KeySym k;
271 uint mask;
272 char *s;
273 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
274 signed char appkey; /* application keypad */
275 signed char appcursor; /* application cursor */
276 signed char crlf; /* crlf mode */
277 } Key;
278
279 typedef struct {
280 int mode;
281 int type;
282 int snap;
283 /*
284 * Selection variables:
285 * nb – normalized coordinates of the beginning of the selection
286 * ne – normalized coordinates of the end of the selection
287 * ob – original coordinates of the beginning of the selection
288 * oe – original coordinates of the end of the selection
289 */
290 struct {
291 int x, y;
292 } nb, ne, ob, oe;
293
294 char *primary, *clipboard;
295 Atom xtarget;
296 bool alt;
297 struct timespec tclick1;
298 struct timespec tclick2;
299 } Selection;
300
301 typedef union {
302 int i;
303 uint ui;
304 float f;
305 const void *v;
306 } Arg;
307
308 typedef struct {
309 uint mod;
310 KeySym keysym;
311 void (*func)(const Arg *);
312 const Arg arg;
313 } Shortcut;
314
315 /* function definitions used in config.h */
316 static void clipcopy(const Arg *);
317 static void clippaste(const Arg *);
318 static void numlock(const Arg *);
319 static void selpaste(const Arg *);
320 static void xzoom(const Arg *);
321 static void xzoomabs(const Arg *);
322 static void xzoomreset(const Arg *);
323 static void printsel(const Arg *);
324 static void printscreen(const Arg *) ;
325 static void toggleprinter(const Arg *);
326
327 /* Config.h for applying patches and the configuration. */
328 #include "config.h"
329
330 /* Font structure */
331 typedef struct {
332 int height;
333 int width;
334 int ascent;
335 int descent;
336 short lbearing;
337 short rbearing;
338 XftFont *match;
339 FcFontSet *set;
340 FcPattern *pattern;
341 } Font;
342
343 /* Drawing Context */
344 typedef struct {
345 Color col[MAX(LEN(colorname), 256)];
346 Font font, bfont, ifont, ibfont;
347 GC gc;
348 } DC;
349
350 static void die(const char *, ...);
351 static void draw(void);
352 static void redraw(void);
353 static void drawregion(int, int, int, int);
354 static void execsh(void);
355 static void sigchld(int);
356 static void run(void);
357
358 static void csidump(void);
359 static void csihandle(void);
360 static void csiparse(void);
361 static void csireset(void);
362 static int eschandle(uchar ascii);
363 static void strdump(void);
364 static void strhandle(void);
365 static void strparse(void);
366 static void strreset(void);
367
368 static int tattrset(int);
369 static void tprinter(char *, size_t);
370 static void tdumpsel(void);
371 static void tdumpline(int);
372 static void tdump(void);
373 static void tclearregion(int, int, int, int);
374 static void tcursor(int);
375 static void tdeletechar(int);
376 static void tdeleteline(int);
377 static void tinsertblank(int);
378 static void tinsertblankline(int);
379 static int tlinelen(int);
380 static void tmoveto(int, int);
381 static void tmoveato(int, int);
382 static void tnew(int, int);
383 static void tnewline(int);
384 static void tputtab(int);
385 static void tputc(char *, int);
386 static void treset(void);
387 static void tresize(int, int);
388 static void tscrollup(int, int);
389 static void tscrolldown(int, int);
390 static void tsetattr(int *, int);
391 static void tsetchar(char *, Glyph *, int, int);
392 static void tsetscroll(int, int);
393 static void tswapscreen(void);
394 static void tsetdirt(int, int);
395 static void tsetdirtattr(int);
396 static void tsetmode(bool, bool, int *, int);
397 static void tfulldirt(void);
398 static void techo(char *, int);
399 static void tcontrolcode(uchar );
400 static void tdectest(char );
401 static int32_t tdefcolor(int *, int *, int);
402 static void tdeftran(char);
403 static inline bool match(uint, uint);
404 static void ttynew(void);
405 static void ttyread(void);
406 static void ttyresize(void);
407 static void ttysend(char *, size_t);
408 static void ttywrite(const char *, size_t);
409 static void tstrsequence(uchar c);
410
411 static void xdraws(char *, Glyph, int, int, int, int);
412 static void xhints(void);
413 static void xclear(int, int, int, int);
414 static void xdrawcursor(void);
415 static void xinit(void);
416 static void xloadcols(void);
417 static int xsetcolorname(int, const char *);
418 static int xgeommasktogravity(int);
419 static int xloadfont(Font *, FcPattern *);
420 static void xloadfonts(char *, double);
421 static int xloadfontset(Font *);
422 static void xsettitle(char *);
423 static void xresettitle(void);
424 static void xsetpointermotion(int);
425 static void xseturgency(int);
426 static void xsetsel(char *);
427 static void xtermclear(int, int, int, int);
428 static void xunloadfont(Font *);
429 static void xunloadfonts(void);
430 static void xresize(int, int);
431
432 static void expose(XEvent *);
433 static void visibility(XEvent *);
434 static void unmap(XEvent *);
435 static char *kmap(KeySym, uint);
436 static void kpress(XEvent *);
437 static void cmessage(XEvent *);
438 static void cresize(int, int);
439 static void resize(XEvent *);
440 static void focus(XEvent *);
441 static void brelease(XEvent *);
442 static void bpress(XEvent *);
443 static void bmotion(XEvent *);
444 static void selnotify(XEvent *);
445 static void selclear(XEvent *);
446 static void selrequest(XEvent *);
447
448 static void selinit(void);
449 static void selnormalize(void);
450 static inline bool selected(int, int);
451 static char *getsel(void);
452 static void selcopy(void);
453 static void selscroll(int, int);
454 static void selsnap(int, int *, int *, int);
455 static void getbuttoninfo(XEvent *);
456 static void mousereport(XEvent *);
457
458 static size_t utf8decode(char *, long *, size_t);
459 static long utf8decodebyte(char, size_t *);
460 static size_t utf8encode(long, char *, size_t);
461 static char utf8encodebyte(long, size_t);
462 static size_t utf8len(char *);
463 static size_t utf8validate(long *, size_t);
464
465 static ssize_t xwrite(int, const char *, size_t);
466 static void *xmalloc(size_t);
467 static void *xrealloc(void *, size_t);
468 static char *xstrdup(char *);
469
470 static void usage(void);
471
472 static void (*handler[LASTEvent])(XEvent *) = {
473 [KeyPress] = kpress,
474 [ClientMessage] = cmessage,
475 [ConfigureNotify] = resize,
476 [VisibilityNotify] = visibility,
477 [UnmapNotify] = unmap,
478 [Expose] = expose,
479 [FocusIn] = focus,
480 [FocusOut] = focus,
481 [MotionNotify] = bmotion,
482 [ButtonPress] = bpress,
483 [ButtonRelease] = brelease,
484 /*
485 * Uncomment if you want the selection to disappear when you select something
486 * different in another window.
487 */
488 /* [SelectionClear] = selclear, */
489 [SelectionNotify] = selnotify,
490 [SelectionRequest] = selrequest,
491 };
492
493 /* Globals */
494 static DC dc;
495 static XWindow xw;
496 static Term term;
497 static CSIEscape csiescseq;
498 static STREscape strescseq;
499 static int cmdfd;
500 static pid_t pid;
501 static Selection sel;
502 static int iofd = STDOUT_FILENO;
503 static char **opt_cmd = NULL;
504 static char *opt_io = NULL;
505 static char *opt_title = NULL;
506 static char *opt_embed = NULL;
507 static char *opt_class = NULL;
508 static char *opt_font = NULL;
509 static int oldbutton = 3; /* button event on startup: 3 = release */
510
511 static char *usedfont = NULL;
512 static double usedfontsize = 0;
513 static double defaultfontsize = 0;
514
515 static uchar utfbyte[UTF_SIZ + 1] = {0x80, 0, 0xC0, 0xE0, 0xF0};
516 static uchar utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
517 static long utfmin[UTF_SIZ + 1] = { 0, 0, 0x80, 0x800, 0x10000};
518 static long utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
519
520 /* Font Ring Cache */
521 enum {
522 FRC_NORMAL,
523 FRC_ITALIC,
524 FRC_BOLD,
525 FRC_ITALICBOLD
526 };
527
528 typedef struct {
529 XftFont *font;
530 int flags;
531 long unicodep;
532 } Fontcache;
533
534 /* Fontcache is an array now. A new font will be appended to the array. */
535 static Fontcache frc[16];
536 static int frclen = 0;
537
538 ssize_t
539 xwrite(int fd, const char *s, size_t len) {
540 size_t aux = len;
541
542 while(len > 0) {
543 ssize_t r = write(fd, s, len);
544 if(r < 0)
545 return r;
546 len -= r;
547 s += r;
548 }
549 return aux;
550 }
551
552 void *
553 xmalloc(size_t len) {
554 void *p = malloc(len);
555
556 if(!p)
557 die("Out of memory\n");
558
559 return p;
560 }
561
562 void *
563 xrealloc(void *p, size_t len) {
564 if((p = realloc(p, len)) == NULL)
565 die("Out of memory\n");
566
567 return p;
568 }
569
570 char *
571 xstrdup(char *s) {
572 if((s = strdup(s)) == NULL)
573 die("Out of memory\n");
574
575 return s;
576 }
577
578 size_t
579 utf8decode(char *c, long *u, size_t clen) {
580 size_t i, j, len, type;
581 long udecoded;
582
583 *u = UTF_INVALID;
584 if(!clen)
585 return 0;
586 udecoded = utf8decodebyte(c[0], &len);
587 if(!BETWEEN(len, 1, UTF_SIZ))
588 return 1;
589 for(i = 1, j = 1; i < clen && j < len; ++i, ++j) {
590 udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
591 if(type != 0)
592 return j;
593 }
594 if(j < len)
595 return 0;
596 *u = udecoded;
597 utf8validate(u, len);
598 return len;
599 }
600
601 long
602 utf8decodebyte(char c, size_t *i) {
603 for(*i = 0; *i < LEN(utfmask); ++(*i))
604 if(((uchar)c & utfmask[*i]) == utfbyte[*i])
605 return (uchar)c & ~utfmask[*i];
606 return 0;
607 }
608
609 size_t
610 utf8encode(long u, char *c, size_t clen) {
611 size_t len, i;
612
613 len = utf8validate(&u, 0);
614 if(clen < len)
615 return 0;
616 for(i = len - 1; i != 0; --i) {
617 c[i] = utf8encodebyte(u, 0);
618 u >>= 6;
619 }
620 c[0] = utf8encodebyte(u, len);
621 return len;
622 }
623
624 char
625 utf8encodebyte(long u, size_t i) {
626 return utfbyte[i] | (u & ~utfmask[i]);
627 }
628
629 size_t
630 utf8len(char *c) {
631 return utf8decode(c, &(long){0}, UTF_SIZ);
632 }
633
634 size_t
635 utf8validate(long *u, size_t i) {
636 if(!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF))
637 *u = UTF_INVALID;
638 for(i = 1; *u > utfmax[i]; ++i)
639 ;
640 return i;
641 }
642
643 static void
644 selinit(void) {
645 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
646 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
647 sel.mode = 0;
648 sel.ob.x = -1;
649 sel.primary = NULL;
650 sel.clipboard = NULL;
651 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
652 if(sel.xtarget == None)
653 sel.xtarget = XA_STRING;
654 }
655
656 static int
657 x2col(int x) {
658 x -= borderpx;
659 x /= xw.cw;
660
661 return LIMIT(x, 0, term.col-1);
662 }
663
664 static int
665 y2row(int y) {
666 y -= borderpx;
667 y /= xw.ch;
668
669 return LIMIT(y, 0, term.row-1);
670 }
671
672 static int tlinelen(int y) {
673 int i = term.col;
674
675 if(term.line[y][i - 1].mode & ATTR_WRAP)
676 return i;
677
678 while(i > 0 && term.line[y][i - 1].c[0] == ' ')
679 --i;
680
681 return i;
682 }
683
684 static void
685 selnormalize(void) {
686 int i;
687
688 if(sel.ob.y == sel.oe.y || sel.type == SEL_RECTANGULAR) {
689 sel.nb.x = MIN(sel.ob.x, sel.oe.x);
690 sel.ne.x = MAX(sel.ob.x, sel.oe.x);
691 } else {
692 sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
693 sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
694 }
695 sel.nb.y = MIN(sel.ob.y, sel.oe.y);
696 sel.ne.y = MAX(sel.ob.y, sel.oe.y);
697
698 selsnap(sel.snap, &sel.nb.x, &sel.nb.y, -1);
699 selsnap(sel.snap, &sel.ne.x, &sel.ne.y, +1);
700
701 /* expand selection over line breaks */
702 if (sel.type == SEL_RECTANGULAR)
703 return;
704 i = tlinelen(sel.nb.y);
705 if (i < sel.nb.x)
706 sel.nb.x = i;
707 if (tlinelen(sel.ne.y) <= sel.ne.x)
708 sel.ne.x = term.col - 1;
709 }
710
711 static inline bool
712 selected(int x, int y) {
713 if(sel.type == SEL_RECTANGULAR)
714 return BETWEEN(y, sel.nb.y, sel.ne.y)
715 && BETWEEN(x, sel.nb.x, sel.ne.x);
716
717 return BETWEEN(y, sel.nb.y, sel.ne.y)
718 && (y != sel.nb.y || x >= sel.nb.x)
719 && (y != sel.ne.y || x <= sel.ne.x);
720 }
721
722 void
723 selsnap(int mode, int *x, int *y, int direction) {
724 int newx, newy, xt, yt;
725 bool delim, prevdelim;
726 Glyph *gp, *prevgp;
727
728 switch(mode) {
729 case SNAP_WORD:
730 /*
731 * Snap around if the word wraps around at the end or
732 * beginning of a line.
733 */
734 prevgp = &term.line[*y][*x];
735 prevdelim = strchr(worddelimiters, prevgp->c[0]) != NULL;
736 for(;;) {
737 newx = *x + direction;
738 newy = *y;
739 if(!BETWEEN(newx, 0, term.col - 1)) {
740 newy += direction;
741 newx = (newx + term.col) % term.col;
742 if (!BETWEEN(newy, 0, term.row - 1))
743 break;
744
745 if(direction > 0)
746 yt = *y, xt = *x;
747 else
748 yt = newy, xt = newx;
749 if(!(term.line[yt][xt].mode & ATTR_WRAP))
750 break;
751 }
752
753 if (newx >= tlinelen(newy))
754 break;
755
756 gp = &term.line[newy][newx];
757 delim = strchr(worddelimiters, gp->c[0]) != NULL;
758 if(!(gp->mode & ATTR_WDUMMY) && (delim != prevdelim
759 || (delim && gp->c[0] != prevgp->c[0])))
760 break;
761
762 *x = newx;
763 *y = newy;
764 prevgp = gp;
765 prevdelim = delim;
766 }
767 break;
768 case SNAP_LINE:
769 /*
770 * Snap around if the the previous line or the current one
771 * has set ATTR_WRAP at its end. Then the whole next or
772 * previous line will be selected.
773 */
774 *x = (direction < 0) ? 0 : term.col - 1;
775 if(direction < 0 && *y > 0) {
776 for(; *y > 0; *y += direction) {
777 if(!(term.line[*y-1][term.col-1].mode
778 & ATTR_WRAP)) {
779 break;
780 }
781 }
782 } else if(direction > 0 && *y < term.row-1) {
783 for(; *y < term.row; *y += direction) {
784 if(!(term.line[*y][term.col-1].mode
785 & ATTR_WRAP)) {
786 break;
787 }
788 }
789 }
790 break;
791 }
792 }
793
794 void
795 getbuttoninfo(XEvent *e) {
796 int type;
797 uint state = e->xbutton.state & ~(Button1Mask | forceselmod);
798
799 sel.alt = IS_SET(MODE_ALTSCREEN);
800
801 sel.oe.x = x2col(e->xbutton.x);
802 sel.oe.y = y2row(e->xbutton.y);
803 selnormalize();
804
805 sel.type = SEL_REGULAR;
806 for(type = 1; type < LEN(selmasks); ++type) {
807 if(match(selmasks[type], state)) {
808 sel.type = type;
809 break;
810 }
811 }
812 }
813
814 void
815 mousereport(XEvent *e) {
816 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
817 button = e->xbutton.button, state = e->xbutton.state,
818 len;
819 char buf[40];
820 static int ox, oy;
821
822 /* from urxvt */
823 if(e->xbutton.type == MotionNotify) {
824 if(x == ox && y == oy)
825 return;
826 if(!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
827 return;
828 /* MOUSE_MOTION: no reporting if no button is pressed */
829 if(IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
830 return;
831
832 button = oldbutton + 32;
833 ox = x;
834 oy = y;
835 } else {
836 if(!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
837 button = 3;
838 } else {
839 button -= Button1;
840 if(button >= 3)
841 button += 64 - 3;
842 }
843 if(e->xbutton.type == ButtonPress) {
844 oldbutton = button;
845 ox = x;
846 oy = y;
847 } else if(e->xbutton.type == ButtonRelease) {
848 oldbutton = 3;
849 /* MODE_MOUSEX10: no button release reporting */
850 if(IS_SET(MODE_MOUSEX10))
851 return;
852 if (button == 64 || button == 65)
853 return;
854 }
855 }
856
857 if(!IS_SET(MODE_MOUSEX10)) {
858 button += (state & ShiftMask ? 4 : 0)
859 + (state & Mod4Mask ? 8 : 0)
860 + (state & ControlMask ? 16 : 0);
861 }
862
863 len = 0;
864 if(IS_SET(MODE_MOUSESGR)) {
865 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
866 button, x+1, y+1,
867 e->xbutton.type == ButtonRelease ? 'm' : 'M');
868 } else if(x < 223 && y < 223) {
869 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
870 32+button, 32+x+1, 32+y+1);
871 } else {
872 return;
873 }
874
875 ttywrite(buf, len);
876 }
877
878 void
879 bpress(XEvent *e) {
880 struct timespec now;
881 Mousekey *mk;
882
883 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
884 mousereport(e);
885 return;
886 }
887
888 for(mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
889 if(e->xbutton.button == mk->b
890 && match(mk->mask, e->xbutton.state)) {
891 ttysend(mk->s, strlen(mk->s));
892 return;
893 }
894 }
895
896 if(e->xbutton.button == Button1) {
897 clock_gettime(CLOCK_MONOTONIC, &now);
898
899 /* Clear previous selection, logically and visually. */
900 selclear(NULL);
901 sel.mode = 1;
902 sel.type = SEL_REGULAR;
903 sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
904 sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
905
906 /*
907 * If the user clicks below predefined timeouts specific
908 * snapping behaviour is exposed.
909 */
910 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
911 sel.snap = SNAP_LINE;
912 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
913 sel.snap = SNAP_WORD;
914 } else {
915 sel.snap = 0;
916 }
917 selnormalize();
918
919 /*
920 * Draw selection, unless it's regular and we don't want to
921 * make clicks visible
922 */
923 if(sel.snap != 0) {
924 sel.mode++;
925 tsetdirt(sel.nb.y, sel.ne.y);
926 }
927 sel.tclick2 = sel.tclick1;
928 sel.tclick1 = now;
929 }
930 }
931
932 char *
933 getsel(void) {
934 char *str, *ptr;
935 int y, bufsize, size, lastx, linelen;
936 Glyph *gp, *last;
937
938 if(sel.ob.x == -1)
939 return NULL;
940
941 bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
942 ptr = str = xmalloc(bufsize);
943
944 /* append every set & selected glyph to the selection */
945 for(y = sel.nb.y; y < sel.ne.y + 1; y++) {
946 linelen = tlinelen(y);
947
948 if(sel.type == SEL_RECTANGULAR) {
949 gp = &term.line[y][sel.nb.x];
950 lastx = sel.ne.x;
951 } else {
952 gp = &term.line[y][sel.nb.y == y ? sel.nb.x : 0];
953 lastx = (sel.ne.y == y) ? sel.ne.x : term.col-1;
954 }
955 last = &term.line[y][MIN(lastx, linelen-1)];
956 while(last >= gp && last->c[0] == ' ')
957 --last;
958
959 for( ; gp <= last; ++gp) {
960 if(gp->mode & ATTR_WDUMMY)
961 continue;
962
963 size = utf8len(gp->c);
964 memcpy(ptr, gp->c, size);
965 ptr += size;
966 }
967
968 /*
969 * Copy and pasting of line endings is inconsistent
970 * in the inconsistent terminal and GUI world.
971 * The best solution seems like to produce '\n' when
972 * something is copied from st and convert '\n' to
973 * '\r', when something to be pasted is received by
974 * st.
975 * FIXME: Fix the computer world.
976 */
977 if((y < sel.ne.y || lastx >= linelen) && !(last->mode & ATTR_WRAP))
978 *ptr++ = '\n';
979 }
980 *ptr = 0;
981 return str;
982 }
983
984 void
985 selcopy(void) {
986 xsetsel(getsel());
987 }
988
989 void
990 selnotify(XEvent *e) {
991 ulong nitems, ofs, rem;
992 int format;
993 uchar *data, *last, *repl;
994 Atom type;
995 XSelectionEvent *xsev;
996
997 ofs = 0;
998 xsev = (XSelectionEvent *)e;
999 do {
1000 if(XGetWindowProperty(xw.dpy, xw.win, xsev->property, ofs,
1001 BUFSIZ/4, False, AnyPropertyType,
1002 &type, &format, &nitems, &rem,
1003 &data)) {
1004 fprintf(stderr, "Clipboard allocation failed\n");
1005 return;
1006 }
1007
1008 /*
1009 * As seen in getsel:
1010 * Line endings are inconsistent in the terminal and GUI world
1011 * copy and pasting. When receiving some selection data,
1012 * replace all '\n' with '\r'.
1013 * FIXME: Fix the computer world.
1014 */
1015 repl = data;
1016 last = data + nitems * format / 8;
1017 while((repl = memchr(repl, '\n', last - repl))) {
1018 *repl++ = '\r';
1019 }
1020
1021 if(IS_SET(MODE_BRCKTPASTE))
1022 ttywrite("\033[200~", 6);
1023 ttysend((char *)data, nitems * format / 8);
1024 if(IS_SET(MODE_BRCKTPASTE))
1025 ttywrite("\033[201~", 6);
1026 XFree(data);
1027 /* number of 32-bit chunks returned */
1028 ofs += nitems * format / 32;
1029 } while(rem > 0);
1030 }
1031
1032 void
1033 selpaste(const Arg *dummy) {
1034 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
1035 xw.win, CurrentTime);
1036 }
1037
1038 void
1039 clipcopy(const Arg *dummy) {
1040 Atom clipboard;
1041
1042 if(sel.clipboard != NULL)
1043 free(sel.clipboard);
1044
1045 if(sel.primary != NULL) {
1046 sel.clipboard = xstrdup(sel.primary);
1047 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1048 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
1049 }
1050 }
1051
1052 void
1053 clippaste(const Arg *dummy) {
1054 Atom clipboard;
1055
1056 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1057 XConvertSelection(xw.dpy, clipboard, sel.xtarget, clipboard,
1058 xw.win, CurrentTime);
1059 }
1060
1061 void
1062 selclear(XEvent *e) {
1063 if(sel.ob.x == -1)
1064 return;
1065 sel.ob.x = -1;
1066 tsetdirt(sel.nb.y, sel.ne.y);
1067 }
1068
1069 void
1070 selrequest(XEvent *e) {
1071 XSelectionRequestEvent *xsre;
1072 XSelectionEvent xev;
1073 Atom xa_targets, string, clipboard;
1074 char *seltext;
1075
1076 xsre = (XSelectionRequestEvent *) e;
1077 xev.type = SelectionNotify;
1078 xev.requestor = xsre->requestor;
1079 xev.selection = xsre->selection;
1080 xev.target = xsre->target;
1081 xev.time = xsre->time;
1082 /* reject */
1083 xev.property = None;
1084
1085 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
1086 if(xsre->target == xa_targets) {
1087 /* respond with the supported type */
1088 string = sel.xtarget;
1089 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1090 XA_ATOM, 32, PropModeReplace,
1091 (uchar *) &string, 1);
1092 xev.property = xsre->property;
1093 } else if(xsre->target == sel.xtarget || xsre->target == XA_STRING) {
1094 /*
1095 * xith XA_STRING non ascii characters may be incorrect in the
1096 * requestor. It is not our problem, use utf8.
1097 */
1098 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1099 if(xsre->selection == XA_PRIMARY) {
1100 seltext = sel.primary;
1101 } else if(xsre->selection == clipboard) {
1102 seltext = sel.clipboard;
1103 } else {
1104 fprintf(stderr,
1105 "Unhandled clipboard selection 0x%lx\n",
1106 xsre->selection);
1107 return;
1108 }
1109 if(seltext != NULL) {
1110 XChangeProperty(xsre->display, xsre->requestor,
1111 xsre->property, xsre->target,
1112 8, PropModeReplace,
1113 (uchar *)seltext, strlen(seltext));
1114 xev.property = xsre->property;
1115 }
1116 }
1117
1118 /* all done, send a notification to the listener */
1119 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
1120 fprintf(stderr, "Error sending SelectionNotify event\n");
1121 }
1122
1123 void
1124 xsetsel(char *str) {
1125 free(sel.primary);
1126 sel.primary = str;
1127
1128 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
1129 }
1130
1131 void
1132 brelease(XEvent *e) {
1133 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1134 mousereport(e);
1135 return;
1136 }
1137
1138 if(e->xbutton.button == Button2) {
1139 selpaste(NULL);
1140 } else if(e->xbutton.button == Button1) {
1141 if(sel.mode < 2) {
1142 selclear(NULL);
1143 } else {
1144 getbuttoninfo(e);
1145 selcopy();
1146 }
1147 sel.mode = 0;
1148 tsetdirt(sel.nb.y, sel.ne.y);
1149 }
1150 }
1151
1152 void
1153 bmotion(XEvent *e) {
1154 int oldey, oldex, oldsby, oldsey;
1155
1156 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1157 mousereport(e);
1158 return;
1159 }
1160
1161 if(!sel.mode)
1162 return;
1163
1164 sel.mode++;
1165 oldey = sel.oe.y;
1166 oldex = sel.oe.x;
1167 oldsby = sel.nb.y;
1168 oldsey = sel.ne.y;
1169 getbuttoninfo(e);
1170
1171 if(oldey != sel.oe.y || oldex != sel.oe.x)
1172 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
1173 }
1174
1175 void
1176 die(const char *errstr, ...) {
1177 va_list ap;
1178
1179 va_start(ap, errstr);
1180 vfprintf(stderr, errstr, ap);
1181 va_end(ap);
1182 exit(EXIT_FAILURE);
1183 }
1184
1185 void
1186 execsh(void) {
1187 char **args, *sh, *prog;
1188 const struct passwd *pw;
1189 char buf[sizeof(long) * 8 + 1];
1190
1191 errno = 0;
1192 if((pw = getpwuid(getuid())) == NULL) {
1193 if(errno)
1194 die("getpwuid:%s\n", strerror(errno));
1195 else
1196 die("who are you?\n");
1197 }
1198
1199 if (!(sh = getenv("SHELL"))) {
1200 sh = (pw->pw_shell[0]) ? pw->pw_shell : shell;
1201 }
1202
1203 if(opt_cmd)
1204 prog = opt_cmd[0];
1205 else if(utmp)
1206 prog = utmp;
1207 else
1208 prog = sh;
1209 args = (opt_cmd) ? opt_cmd : (char *[]) {prog, NULL};
1210
1211 snprintf(buf, sizeof(buf), "%lu", xw.win);
1212
1213 unsetenv("COLUMNS");
1214 unsetenv("LINES");
1215 unsetenv("TERMCAP");
1216 setenv("LOGNAME", pw->pw_name, 1);
1217 setenv("USER", pw->pw_name, 1);
1218 setenv("SHELL", sh, 1);
1219 setenv("HOME", pw->pw_dir, 1);
1220 setenv("TERM", termname, 1);
1221 setenv("WINDOWID", buf, 1);
1222
1223 signal(SIGCHLD, SIG_DFL);
1224 signal(SIGHUP, SIG_DFL);
1225 signal(SIGINT, SIG_DFL);
1226 signal(SIGQUIT, SIG_DFL);
1227 signal(SIGTERM, SIG_DFL);
1228 signal(SIGALRM, SIG_DFL);
1229
1230 execvp(prog, args);
1231 _exit(EXIT_FAILURE);
1232 }
1233
1234 void
1235 sigchld(int a) {
1236 int stat, ret;
1237
1238 if(waitpid(pid, &stat, 0) < 0)
1239 die("Waiting for pid %hd failed: %s\n", pid, strerror(errno));
1240
1241 ret = WIFEXITED(stat) ? WEXITSTATUS(stat) : EXIT_FAILURE;
1242 if (ret != EXIT_SUCCESS)
1243 die("child finished with error '%d'\n", stat);
1244 exit(EXIT_SUCCESS);
1245 }
1246
1247 void
1248 ttynew(void) {
1249 int m, s;
1250 struct winsize w = {term.row, term.col, 0, 0};
1251
1252 /* seems to work fine on linux, openbsd and freebsd */
1253 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1254 die("openpty failed: %s\n", strerror(errno));
1255
1256 switch(pid = fork()) {
1257 case -1:
1258 die("fork failed\n");
1259 break;
1260 case 0:
1261 setsid(); /* create a new process group */
1262 dup2(s, STDIN_FILENO);
1263 dup2(s, STDOUT_FILENO);
1264 dup2(s, STDERR_FILENO);
1265 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1266 die("ioctl TIOCSCTTY failed: %s\n", strerror(errno));
1267 close(s);
1268 close(m);
1269 execsh();
1270 break;
1271 default:
1272 close(s);
1273 cmdfd = m;
1274 signal(SIGCHLD, sigchld);
1275 if(opt_io) {
1276 term.mode |= MODE_PRINT;
1277 iofd = (!strcmp(opt_io, "-")) ?
1278 STDOUT_FILENO :
1279 open(opt_io, O_WRONLY | O_CREAT, 0666);
1280 if(iofd < 0) {
1281 fprintf(stderr, "Error opening %s:%s\n",
1282 opt_io, strerror(errno));
1283 }
1284 }
1285 break;
1286 }
1287 }
1288
1289 void
1290 ttyread(void) {
1291 static char buf[BUFSIZ];
1292 static int buflen = 0;
1293 char *ptr;
1294 char s[UTF_SIZ];
1295 int charsize; /* size of utf8 char in bytes */
1296 long unicodep;
1297 int ret;
1298
1299 /* append read bytes to unprocessed bytes */
1300 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1301 die("Couldn't read from shell: %s\n", strerror(errno));
1302
1303 /* process every complete utf8 char */
1304 buflen += ret;
1305 ptr = buf;
1306 while((charsize = utf8decode(ptr, &unicodep, buflen))) {
1307 utf8encode(unicodep, s, UTF_SIZ);
1308 tputc(s, charsize);
1309 ptr += charsize;
1310 buflen -= charsize;
1311 }
1312
1313 /* keep any uncomplete utf8 char for the next call */
1314 memmove(buf, ptr, buflen);
1315 }
1316
1317 void
1318 ttywrite(const char *s, size_t n) {
1319 if(xwrite(cmdfd, s, n) == -1)
1320 die("write error on tty: %s\n", strerror(errno));
1321 }
1322
1323 void
1324 ttysend(char *s, size_t n) {
1325 ttywrite(s, n);
1326 if(IS_SET(MODE_ECHO))
1327 techo(s, n);
1328 }
1329
1330 void
1331 ttyresize(void) {
1332 struct winsize w;
1333
1334 w.ws_row = term.row;
1335 w.ws_col = term.col;
1336 w.ws_xpixel = xw.tw;
1337 w.ws_ypixel = xw.th;
1338 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1339 fprintf(stderr, "Couldn't set window size: %s\n", strerror(errno));
1340 }
1341
1342 int
1343 tattrset(int attr) {
1344 int i, j;
1345
1346 for(i = 0; i < term.row-1; i++) {
1347 for(j = 0; j < term.col-1; j++) {
1348 if(term.line[i][j].mode & attr)
1349 return 1;
1350 }
1351 }
1352
1353 return 0;
1354 }
1355
1356 void
1357 tsetdirt(int top, int bot) {
1358 int i;
1359
1360 LIMIT(top, 0, term.row-1);
1361 LIMIT(bot, 0, term.row-1);
1362
1363 for(i = top; i <= bot; i++)
1364 term.dirty[i] = 1;
1365 }
1366
1367 void
1368 tsetdirtattr(int attr) {
1369 int i, j;
1370
1371 for(i = 0; i < term.row-1; i++) {
1372 for(j = 0; j < term.col-1; j++) {
1373 if(term.line[i][j].mode & attr) {
1374 tsetdirt(i, i);
1375 break;
1376 }
1377 }
1378 }
1379 }
1380
1381 void
1382 tfulldirt(void) {
1383 tsetdirt(0, term.row-1);
1384 }
1385
1386 void
1387 tcursor(int mode) {
1388 static TCursor c[2];
1389 bool alt = IS_SET(MODE_ALTSCREEN);
1390
1391 if(mode == CURSOR_SAVE) {
1392 c[alt] = term.c;
1393 } else if(mode == CURSOR_LOAD) {
1394 term.c = c[alt];
1395 tmoveto(c[alt].x, c[alt].y);
1396 }
1397 }
1398
1399 void
1400 treset(void) {
1401 uint i;
1402
1403 term.c = (TCursor){{
1404 .mode = ATTR_NULL,
1405 .fg = defaultfg,
1406 .bg = defaultbg
1407 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1408
1409 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1410 for(i = tabspaces; i < term.col; i += tabspaces)
1411 term.tabs[i] = 1;
1412 term.top = 0;
1413 term.bot = term.row - 1;
1414 term.mode = MODE_WRAP;
1415 memset(term.trantbl, sizeof(term.trantbl), CS_USA);
1416 term.charset = 0;
1417
1418 for(i = 0; i < 2; i++) {
1419 tmoveto(0, 0);
1420 tcursor(CURSOR_SAVE);
1421 tclearregion(0, 0, term.col-1, term.row-1);
1422 tswapscreen();
1423 }
1424 }
1425
1426 void
1427 tnew(int col, int row) {
1428 term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } };
1429 tresize(col, row);
1430 term.numlock = 1;
1431
1432 treset();
1433 }
1434
1435 void
1436 tswapscreen(void) {
1437 Line *tmp = term.line;
1438
1439 term.line = term.alt;
1440 term.alt = tmp;
1441 term.mode ^= MODE_ALTSCREEN;
1442 tfulldirt();
1443 }
1444
1445 void
1446 tscrolldown(int orig, int n) {
1447 int i;
1448 Line temp;
1449
1450 LIMIT(n, 0, term.bot-orig+1);
1451
1452 tsetdirt(orig, term.bot-n);
1453 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1454
1455 for(i = term.bot; i >= orig+n; i--) {
1456 temp = term.line[i];
1457 term.line[i] = term.line[i-n];
1458 term.line[i-n] = temp;
1459 }
1460
1461 selscroll(orig, n);
1462 }
1463
1464 void
1465 tscrollup(int orig, int n) {
1466 int i;
1467 Line temp;
1468
1469 LIMIT(n, 0, term.bot-orig+1);
1470
1471 tclearregion(0, orig, term.col-1, orig+n-1);
1472 tsetdirt(orig+n, term.bot);
1473
1474 for(i = orig; i <= term.bot-n; i++) {
1475 temp = term.line[i];
1476 term.line[i] = term.line[i+n];
1477 term.line[i+n] = temp;
1478 }
1479
1480 selscroll(orig, -n);
1481 }
1482
1483 void
1484 selscroll(int orig, int n) {
1485 if(sel.ob.x == -1)
1486 return;
1487
1488 if(BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
1489 if((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
1490 selclear(NULL);
1491 return;
1492 }
1493 if(sel.type == SEL_RECTANGULAR) {
1494 if(sel.ob.y < term.top)
1495 sel.ob.y = term.top;
1496 if(sel.oe.y > term.bot)
1497 sel.oe.y = term.bot;
1498 } else {
1499 if(sel.ob.y < term.top) {
1500 sel.ob.y = term.top;
1501 sel.ob.x = 0;
1502 }
1503 if(sel.oe.y > term.bot) {
1504 sel.oe.y = term.bot;
1505 sel.oe.x = term.col;
1506 }
1507 }
1508 selnormalize();
1509 }
1510 }
1511
1512 void
1513 tnewline(int first_col) {
1514 int y = term.c.y;
1515
1516 if(y == term.bot) {
1517 tscrollup(term.top, 1);
1518 } else {
1519 y++;
1520 }
1521 tmoveto(first_col ? 0 : term.c.x, y);
1522 }
1523
1524 void
1525 csiparse(void) {
1526 char *p = csiescseq.buf, *np;
1527 long int v;
1528
1529 csiescseq.narg = 0;
1530 if(*p == '?') {
1531 csiescseq.priv = 1;
1532 p++;
1533 }
1534
1535 csiescseq.buf[csiescseq.len] = '\0';
1536 while(p < csiescseq.buf+csiescseq.len) {
1537 np = NULL;
1538 v = strtol(p, &np, 10);
1539 if(np == p)
1540 v = 0;
1541 if(v == LONG_MAX || v == LONG_MIN)
1542 v = -1;
1543 csiescseq.arg[csiescseq.narg++] = v;
1544 p = np;
1545 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1546 break;
1547 p++;
1548 }
1549 csiescseq.mode[0] = *p++;
1550 csiescseq.mode[1] = (p < csiescseq.buf+csiescseq.len) ? *p : '\0';
1551 }
1552
1553 /* for absolute user moves, when decom is set */
1554 void
1555 tmoveato(int x, int y) {
1556 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1557 }
1558
1559 void
1560 tmoveto(int x, int y) {
1561 int miny, maxy;
1562
1563 if(term.c.state & CURSOR_ORIGIN) {
1564 miny = term.top;
1565 maxy = term.bot;
1566 } else {
1567 miny = 0;
1568 maxy = term.row - 1;
1569 }
1570 LIMIT(x, 0, term.col-1);
1571 LIMIT(y, miny, maxy);
1572 term.c.state &= ~CURSOR_WRAPNEXT;
1573 term.c.x = x;
1574 term.c.y = y;
1575 }
1576
1577 void
1578 tsetchar(char *c, Glyph *attr, int x, int y) {
1579 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1580 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1581 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1582 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1583 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1584 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1585 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1586 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1587 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1588 };
1589
1590 /*
1591 * The table is proudly stolen from rxvt.
1592 */
1593 if(term.trantbl[term.charset] == CS_GRAPHIC0) {
1594 if(BETWEEN(c[0], 0x41, 0x7e) && vt100_0[c[0] - 0x41]) {
1595 c = vt100_0[c[0] - 0x41];
1596 }
1597 }
1598
1599 if(term.line[y][x].mode & ATTR_WIDE) {
1600 if(x+1 < term.col) {
1601 term.line[y][x+1].c[0] = ' ';
1602 term.line[y][x+1].mode &= ~ATTR_WDUMMY;
1603 }
1604 } else if(term.line[y][x].mode & ATTR_WDUMMY) {
1605 term.line[y][x-1].c[0] = ' ';
1606 term.line[y][x-1].mode &= ~ATTR_WIDE;
1607 }
1608
1609 term.dirty[y] = 1;
1610 term.line[y][x] = *attr;
1611 memcpy(term.line[y][x].c, c, UTF_SIZ);
1612 }
1613
1614 void
1615 tclearregion(int x1, int y1, int x2, int y2) {
1616 int x, y, temp;
1617 Glyph *gp;
1618
1619 if(x1 > x2)
1620 temp = x1, x1 = x2, x2 = temp;
1621 if(y1 > y2)
1622 temp = y1, y1 = y2, y2 = temp;
1623
1624 LIMIT(x1, 0, term.col-1);
1625 LIMIT(x2, 0, term.col-1);
1626 LIMIT(y1, 0, term.row-1);
1627 LIMIT(y2, 0, term.row-1);
1628
1629 for(y = y1; y <= y2; y++) {
1630 term.dirty[y] = 1;
1631 for(x = x1; x <= x2; x++) {
1632 gp = &term.line[y][x];
1633 if(selected(x, y))
1634 selclear(NULL);
1635 gp->fg = term.c.attr.fg;
1636 gp->bg = term.c.attr.bg;
1637 gp->mode = 0;
1638 memcpy(gp->c, " ", 2);
1639 }
1640 }
1641 }
1642
1643 void
1644 tdeletechar(int n) {
1645 int dst, src, size;
1646 Glyph *line;
1647
1648 LIMIT(n, 0, term.col - term.c.x);
1649
1650 dst = term.c.x;
1651 src = term.c.x + n;
1652 size = term.col - src;
1653 line = term.line[term.c.y];
1654
1655 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1656 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1657 }
1658
1659 void
1660 tinsertblank(int n) {
1661 int dst, src, size;
1662 Glyph *line;
1663
1664 LIMIT(n, 0, term.col - term.c.x);
1665
1666 dst = term.c.x + n;
1667 src = term.c.x;
1668 size = term.col - dst;
1669 line = term.line[term.c.y];
1670
1671 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1672 tclearregion(src, term.c.y, dst - 1, term.c.y);
1673 }
1674
1675 void
1676 tinsertblankline(int n) {
1677 if(BETWEEN(term.c.y, term.top, term.bot))
1678 tscrolldown(term.c.y, n);
1679 }
1680
1681 void
1682 tdeleteline(int n) {
1683 if(BETWEEN(term.c.y, term.top, term.bot))
1684 tscrollup(term.c.y, n);
1685 }
1686
1687 int32_t
1688 tdefcolor(int *attr, int *npar, int l) {
1689 int32_t idx = -1;
1690 uint r, g, b;
1691
1692 switch (attr[*npar + 1]) {
1693 case 2: /* direct color in RGB space */
1694 if (*npar + 4 >= l) {
1695 fprintf(stderr,
1696 "erresc(38): Incorrect number of parameters (%d)\n",
1697 *npar);
1698 break;
1699 }
1700 r = attr[*npar + 2];
1701 g = attr[*npar + 3];
1702 b = attr[*npar + 4];
1703 *npar += 4;
1704 if(!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
1705 fprintf(stderr, "erresc: bad rgb color (%d,%d,%d)\n",
1706 r, g, b);
1707 else
1708 idx = TRUECOLOR(r, g, b);
1709 break;
1710 case 5: /* indexed color */
1711 if (*npar + 2 >= l) {
1712 fprintf(stderr,
1713 "erresc(38): Incorrect number of parameters (%d)\n",
1714 *npar);
1715 break;
1716 }
1717 *npar += 2;
1718 if(!BETWEEN(attr[*npar], 0, 255))
1719 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
1720 else
1721 idx = attr[*npar];
1722 break;
1723 case 0: /* implemented defined (only foreground) */
1724 case 1: /* transparent */
1725 case 3: /* direct color in CMY space */
1726 case 4: /* direct color in CMYK space */
1727 default:
1728 fprintf(stderr,
1729 "erresc(38): gfx attr %d unknown\n", attr[*npar]);
1730 break;
1731 }
1732
1733 return idx;
1734 }
1735
1736 void
1737 tsetattr(int *attr, int l) {
1738 int i;
1739 int32_t idx;
1740
1741 for(i = 0; i < l; i++) {
1742 switch(attr[i]) {
1743 case 0:
1744 term.c.attr.mode &= ~(
1745 ATTR_BOLD |
1746 ATTR_FAINT |
1747 ATTR_ITALIC |
1748 ATTR_UNDERLINE |
1749 ATTR_BLINK |
1750 ATTR_REVERSE |
1751 ATTR_INVISIBLE |
1752 ATTR_STRUCK );
1753 term.c.attr.fg = defaultfg;
1754 term.c.attr.bg = defaultbg;
1755 break;
1756 case 1:
1757 term.c.attr.mode |= ATTR_BOLD;
1758 break;
1759 case 2:
1760 term.c.attr.mode |= ATTR_FAINT;
1761 break;
1762 case 3:
1763 term.c.attr.mode |= ATTR_ITALIC;
1764 break;
1765 case 4:
1766 term.c.attr.mode |= ATTR_UNDERLINE;
1767 break;
1768 case 5: /* slow blink */
1769 /* FALLTHROUGH */
1770 case 6: /* rapid blink */
1771 term.c.attr.mode |= ATTR_BLINK;
1772 break;
1773 case 7:
1774 term.c.attr.mode |= ATTR_REVERSE;
1775 break;
1776 case 8:
1777 term.c.attr.mode |= ATTR_INVISIBLE;
1778 break;
1779 case 9:
1780 term.c.attr.mode |= ATTR_STRUCK;
1781 break;
1782 case 22:
1783 term.c.attr.mode &= ~(ATTR_BOLD | ATTR_FAINT);
1784 break;
1785 case 23:
1786 term.c.attr.mode &= ~ATTR_ITALIC;
1787 break;
1788 case 24:
1789 term.c.attr.mode &= ~ATTR_UNDERLINE;
1790 break;
1791 case 25:
1792 term.c.attr.mode &= ~ATTR_BLINK;
1793 break;
1794 case 27:
1795 term.c.attr.mode &= ~ATTR_REVERSE;
1796 break;
1797 case 28:
1798 term.c.attr.mode &= ~ATTR_INVISIBLE;
1799 break;
1800 case 29:
1801 term.c.attr.mode &= ~ATTR_STRUCK;
1802 break;
1803 case 38:
1804 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1805 term.c.attr.fg = idx;
1806 break;
1807 case 39:
1808 term.c.attr.fg = defaultfg;
1809 break;
1810 case 48:
1811 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1812 term.c.attr.bg = idx;
1813 break;
1814 case 49:
1815 term.c.attr.bg = defaultbg;
1816 break;
1817 default:
1818 if(BETWEEN(attr[i], 30, 37)) {
1819 term.c.attr.fg = attr[i] - 30;
1820 } else if(BETWEEN(attr[i], 40, 47)) {
1821 term.c.attr.bg = attr[i] - 40;
1822 } else if(BETWEEN(attr[i], 90, 97)) {
1823 term.c.attr.fg = attr[i] - 90 + 8;
1824 } else if(BETWEEN(attr[i], 100, 107)) {
1825 term.c.attr.bg = attr[i] - 100 + 8;
1826 } else {
1827 fprintf(stderr,
1828 "erresc(default): gfx attr %d unknown\n",
1829 attr[i]), csidump();
1830 }
1831 break;
1832 }
1833 }
1834 }
1835
1836 void
1837 tsetscroll(int t, int b) {
1838 int temp;
1839
1840 LIMIT(t, 0, term.row-1);
1841 LIMIT(b, 0, term.row-1);
1842 if(t > b) {
1843 temp = t;
1844 t = b;
1845 b = temp;
1846 }
1847 term.top = t;
1848 term.bot = b;
1849 }
1850
1851 void
1852 tsetmode(bool priv, bool set, int *args, int narg) {
1853 int *lim, mode;
1854 bool alt;
1855
1856 for(lim = args + narg; args < lim; ++args) {
1857 if(priv) {
1858 switch(*args) {
1859 case 1: /* DECCKM -- Cursor key */
1860 MODBIT(term.mode, set, MODE_APPCURSOR);
1861 break;
1862 case 5: /* DECSCNM -- Reverse video */
1863 mode = term.mode;
1864 MODBIT(term.mode, set, MODE_REVERSE);
1865 if(mode != term.mode)
1866 redraw();
1867 break;
1868 case 6: /* DECOM -- Origin */
1869 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1870 tmoveato(0, 0);
1871 break;
1872 case 7: /* DECAWM -- Auto wrap */
1873 MODBIT(term.mode, set, MODE_WRAP);
1874 break;
1875 case 0: /* Error (IGNORED) */
1876 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1877 case 3: /* DECCOLM -- Column (IGNORED) */
1878 case 4: /* DECSCLM -- Scroll (IGNORED) */
1879 case 8: /* DECARM -- Auto repeat (IGNORED) */
1880 case 18: /* DECPFF -- Printer feed (IGNORED) */
1881 case 19: /* DECPEX -- Printer extent (IGNORED) */
1882 case 42: /* DECNRCM -- National characters (IGNORED) */
1883 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1884 break;
1885 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1886 MODBIT(term.mode, !set, MODE_HIDE);
1887 break;
1888 case 9: /* X10 mouse compatibility mode */
1889 xsetpointermotion(0);
1890 MODBIT(term.mode, 0, MODE_MOUSE);
1891 MODBIT(term.mode, set, MODE_MOUSEX10);
1892 break;
1893 case 1000: /* 1000: report button press */
1894 xsetpointermotion(0);
1895 MODBIT(term.mode, 0, MODE_MOUSE);
1896 MODBIT(term.mode, set, MODE_MOUSEBTN);
1897 break;
1898 case 1002: /* 1002: report motion on button press */
1899 xsetpointermotion(0);
1900 MODBIT(term.mode, 0, MODE_MOUSE);
1901 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1902 break;
1903 case 1003: /* 1003: enable all mouse motions */
1904 xsetpointermotion(set);
1905 MODBIT(term.mode, 0, MODE_MOUSE);
1906 MODBIT(term.mode, set, MODE_MOUSEMANY);
1907 break;
1908 case 1004: /* 1004: send focus events to tty */
1909 MODBIT(term.mode, set, MODE_FOCUS);
1910 break;
1911 case 1006: /* 1006: extended reporting mode */
1912 MODBIT(term.mode, set, MODE_MOUSESGR);
1913 break;
1914 case 1034:
1915 MODBIT(term.mode, set, MODE_8BIT);
1916 break;
1917 case 1049: /* swap screen & set/restore cursor as xterm */
1918 if (!allowaltscreen)
1919 break;
1920 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1921 /* FALLTHROUGH */
1922 case 47: /* swap screen */
1923 case 1047:
1924 if (!allowaltscreen)
1925 break;
1926 alt = IS_SET(MODE_ALTSCREEN);
1927 if(alt) {
1928 tclearregion(0, 0, term.col-1,
1929 term.row-1);
1930 }
1931 if(set ^ alt) /* set is always 1 or 0 */
1932 tswapscreen();
1933 if(*args != 1049)
1934 break;
1935 /* FALLTHROUGH */
1936 case 1048:
1937 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1938 break;
1939 case 2004: /* 2004: bracketed paste mode */
1940 MODBIT(term.mode, set, MODE_BRCKTPASTE);
1941 break;
1942 /* Not implemented mouse modes. See comments there. */
1943 case 1001: /* mouse highlight mode; can hang the
1944 terminal by design when implemented. */
1945 case 1005: /* UTF-8 mouse mode; will confuse
1946 applications not supporting UTF-8
1947 and luit. */
1948 case 1015: /* urxvt mangled mouse mode; incompatible
1949 and can be mistaken for other control
1950 codes. */
1951 default:
1952 fprintf(stderr,
1953 "erresc: unknown private set/reset mode %d\n",
1954 *args);
1955 break;
1956 }
1957 } else {
1958 switch(*args) {
1959 case 0: /* Error (IGNORED) */
1960 break;
1961 case 2: /* KAM -- keyboard action */
1962 MODBIT(term.mode, set, MODE_KBDLOCK);
1963 break;
1964 case 4: /* IRM -- Insertion-replacement */
1965 MODBIT(term.mode, set, MODE_INSERT);
1966 break;
1967 case 12: /* SRM -- Send/Receive */
1968 MODBIT(term.mode, !set, MODE_ECHO);
1969 break;
1970 case 20: /* LNM -- Linefeed/new line */
1971 MODBIT(term.mode, set, MODE_CRLF);
1972 break;
1973 default:
1974 fprintf(stderr,
1975 "erresc: unknown set/reset mode %d\n",
1976 *args);
1977 break;
1978 }
1979 }
1980 }
1981 }
1982
1983 void
1984 csihandle(void) {
1985 char buf[40];
1986 int len;
1987
1988 switch(csiescseq.mode[0]) {
1989 default:
1990 unknown:
1991 fprintf(stderr, "erresc: unknown csi ");
1992 csidump();
1993 /* die(""); */
1994 break;
1995 case '@': /* ICH -- Insert <n> blank char */
1996 DEFAULT(csiescseq.arg[0], 1);
1997 tinsertblank(csiescseq.arg[0]);
1998 break;
1999 case 'A': /* CUU -- Cursor <n> Up */
2000 DEFAULT(csiescseq.arg[0], 1);
2001 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
2002 break;
2003 case 'B': /* CUD -- Cursor <n> Down */
2004 case 'e': /* VPR --Cursor <n> Down */
2005 DEFAULT(csiescseq.arg[0], 1);
2006 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
2007 break;
2008 case 'i': /* MC -- Media Copy */
2009 switch(csiescseq.arg[0]) {
2010 case 0:
2011 tdump();
2012 break;
2013 case 1:
2014 tdumpline(term.c.y);
2015 break;
2016 case 2:
2017 tdumpsel();
2018 break;
2019 case 4:
2020 term.mode &= ~MODE_PRINT;
2021 break;
2022 case 5:
2023 term.mode |= MODE_PRINT;
2024 break;
2025 }
2026 break;
2027 case 'c': /* DA -- Device Attributes */
2028 if(csiescseq.arg[0] == 0)
2029 ttywrite(vtiden, sizeof(vtiden) - 1);
2030 break;
2031 case 'C': /* CUF -- Cursor <n> Forward */
2032 case 'a': /* HPR -- Cursor <n> Forward */
2033 DEFAULT(csiescseq.arg[0], 1);
2034 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
2035 break;
2036 case 'D': /* CUB -- Cursor <n> Backward */
2037 DEFAULT(csiescseq.arg[0], 1);
2038 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
2039 break;
2040 case 'E': /* CNL -- Cursor <n> Down and first col */
2041 DEFAULT(csiescseq.arg[0], 1);
2042 tmoveto(0, term.c.y+csiescseq.arg[0]);
2043 break;
2044 case 'F': /* CPL -- Cursor <n> Up and first col */
2045 DEFAULT(csiescseq.arg[0], 1);
2046 tmoveto(0, term.c.y-csiescseq.arg[0]);
2047 break;
2048 case 'g': /* TBC -- Tabulation clear */
2049 switch(csiescseq.arg[0]) {
2050 case 0: /* clear current tab stop */
2051 term.tabs[term.c.x] = 0;
2052 break;
2053 case 3: /* clear all the tabs */
2054 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
2055 break;
2056 default:
2057 goto unknown;
2058 }
2059 break;
2060 case 'G': /* CHA -- Move to <col> */
2061 case '`': /* HPA */
2062 DEFAULT(csiescseq.arg[0], 1);
2063 tmoveto(csiescseq.arg[0]-1, term.c.y);
2064 break;
2065 case 'H': /* CUP -- Move to <row> <col> */
2066 case 'f': /* HVP */
2067 DEFAULT(csiescseq.arg[0], 1);
2068 DEFAULT(csiescseq.arg[1], 1);
2069 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
2070 break;
2071 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
2072 DEFAULT(csiescseq.arg[0], 1);
2073 tputtab(csiescseq.arg[0]);
2074 break;
2075 case 'J': /* ED -- Clear screen */
2076 selclear(NULL);
2077 switch(csiescseq.arg[0]) {
2078 case 0: /* below */
2079 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
2080 if(term.c.y < term.row-1) {
2081 tclearregion(0, term.c.y+1, term.col-1,
2082 term.row-1);
2083 }
2084 break;
2085 case 1: /* above */
2086 if(term.c.y > 1)
2087 tclearregion(0, 0, term.col-1, term.c.y-1);
2088 tclearregion(0, term.c.y, term.c.x, term.c.y);
2089 break;
2090 case 2: /* all */
2091 tclearregion(0, 0, term.col-1, term.row-1);
2092 break;
2093 default:
2094 goto unknown;
2095 }
2096 break;
2097 case 'K': /* EL -- Clear line */
2098 switch(csiescseq.arg[0]) {
2099 case 0: /* right */
2100 tclearregion(term.c.x, term.c.y, term.col-1,
2101 term.c.y);
2102 break;
2103 case 1: /* left */
2104 tclearregion(0, term.c.y, term.c.x, term.c.y);
2105 break;
2106 case 2: /* all */
2107 tclearregion(0, term.c.y, term.col-1, term.c.y);
2108 break;
2109 }
2110 break;
2111 case 'S': /* SU -- Scroll <n> line up */
2112 DEFAULT(csiescseq.arg[0], 1);
2113 tscrollup(term.top, csiescseq.arg[0]);
2114 break;
2115 case 'T': /* SD -- Scroll <n> line down */
2116 DEFAULT(csiescseq.arg[0], 1);
2117 tscrolldown(term.top, csiescseq.arg[0]);
2118 break;
2119 case 'L': /* IL -- Insert <n> blank lines */
2120 DEFAULT(csiescseq.arg[0], 1);
2121 tinsertblankline(csiescseq.arg[0]);
2122 break;
2123 case 'l': /* RM -- Reset Mode */
2124 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
2125 break;
2126 case 'M': /* DL -- Delete <n> lines */
2127 DEFAULT(csiescseq.arg[0], 1);
2128 tdeleteline(csiescseq.arg[0]);
2129 break;
2130 case 'X': /* ECH -- Erase <n> char */
2131 DEFAULT(csiescseq.arg[0], 1);
2132 tclearregion(term.c.x, term.c.y,
2133 term.c.x + csiescseq.arg[0] - 1, term.c.y);
2134 break;
2135 case 'P': /* DCH -- Delete <n> char */
2136 DEFAULT(csiescseq.arg[0], 1);
2137 tdeletechar(csiescseq.arg[0]);
2138 break;
2139 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
2140 DEFAULT(csiescseq.arg[0], 1);
2141 tputtab(-csiescseq.arg[0]);
2142 break;
2143 case 'd': /* VPA -- Move to <row> */
2144 DEFAULT(csiescseq.arg[0], 1);
2145 tmoveato(term.c.x, csiescseq.arg[0]-1);
2146 break;
2147 case 'h': /* SM -- Set terminal mode */
2148 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
2149 break;
2150 case 'm': /* SGR -- Terminal attribute (color) */
2151 tsetattr(csiescseq.arg, csiescseq.narg);
2152 break;
2153 case 'n': /* DSR – Device Status Report (cursor position) */
2154 if (csiescseq.arg[0] == 6) {
2155 len = snprintf(buf, sizeof(buf),"\033[%i;%iR",
2156 term.c.y+1, term.c.x+1);
2157 ttywrite(buf, len);
2158 }
2159 break;
2160 case 'r': /* DECSTBM -- Set Scrolling Region */
2161 if(csiescseq.priv) {
2162 goto unknown;
2163 } else {
2164 DEFAULT(csiescseq.arg[0], 1);
2165 DEFAULT(csiescseq.arg[1], term.row);
2166 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
2167 tmoveato(0, 0);
2168 }
2169 break;
2170 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
2171 tcursor(CURSOR_SAVE);
2172 break;
2173 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
2174 tcursor(CURSOR_LOAD);
2175 break;
2176 case ' ':
2177 switch (csiescseq.mode[1]) {
2178 case 'q': /* DECSCUSR -- Set Cursor Style */
2179 DEFAULT(csiescseq.arg[0], 1);
2180 if (!BETWEEN(csiescseq.arg[0], 0, 6)) {
2181 goto unknown;
2182 }
2183 xw.cursor = csiescseq.arg[0];
2184 break;
2185 default:
2186 goto unknown;
2187 }
2188 break;
2189 }
2190 }
2191
2192 void
2193 csidump(void) {
2194 int i;
2195 uint c;
2196
2197 printf("ESC[");
2198 for(i = 0; i < csiescseq.len; i++) {
2199 c = csiescseq.buf[i] & 0xff;
2200 if(isprint(c)) {
2201 putchar(c);
2202 } else if(c == '\n') {
2203 printf("(\\n)");
2204 } else if(c == '\r') {
2205 printf("(\\r)");
2206 } else if(c == 0x1b) {
2207 printf("(\\e)");
2208 } else {
2209 printf("(%02x)", c);
2210 }
2211 }
2212 putchar('\n');
2213 }
2214
2215 void
2216 csireset(void) {
2217 memset(&csiescseq, 0, sizeof(csiescseq));
2218 }
2219
2220 void
2221 strhandle(void) {
2222 char *p = NULL;
2223 int j, narg, par;
2224
2225 term.esc &= ~(ESC_STR_END|ESC_STR);
2226 strparse();
2227 narg = strescseq.narg;
2228 par = atoi(strescseq.args[0]);
2229
2230 switch(strescseq.type) {
2231 case ']': /* OSC -- Operating System Command */
2232 switch(par) {
2233 case 0:
2234 case 1:
2235 case 2:
2236 if(narg > 1)
2237 xsettitle(strescseq.args[1]);
2238 return;
2239 case 4: /* color set */
2240 if(narg < 3)
2241 break;
2242 p = strescseq.args[2];
2243 /* FALLTHROUGH */
2244 case 104: /* color reset, here p = NULL */
2245 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2246 if(xsetcolorname(j, p)) {
2247 fprintf(stderr, "erresc: invalid color %s\n", p);
2248 } else {
2249 /*
2250 * TODO if defaultbg color is changed, borders
2251 * are dirty
2252 */
2253 redraw();
2254 }
2255 return;
2256 }
2257 break;
2258 case 'k': /* old title set compatibility */
2259 xsettitle(strescseq.args[0]);
2260 return;
2261 case 'P': /* DCS -- Device Control String */
2262 case '_': /* APC -- Application Program Command */
2263 case '^': /* PM -- Privacy Message */
2264 return;
2265 }
2266
2267 fprintf(stderr, "erresc: unknown str ");
2268 strdump();
2269 }
2270
2271 void
2272 strparse(void) {
2273 char *p = strescseq.buf;
2274
2275 strescseq.narg = 0;
2276 strescseq.buf[strescseq.len] = '\0';
2277 while(p && strescseq.narg < STR_ARG_SIZ)
2278 strescseq.args[strescseq.narg++] = strsep(&p, ";");
2279 }
2280
2281 void
2282 strdump(void) {
2283 int i;
2284 uint c;
2285
2286 printf("ESC%c", strescseq.type);
2287 for(i = 0; i < strescseq.len; i++) {
2288 c = strescseq.buf[i] & 0xff;
2289 if(c == '\0') {
2290 return;
2291 } else if(isprint(c)) {
2292 putchar(c);
2293 } else if(c == '\n') {
2294 printf("(\\n)");
2295 } else if(c == '\r') {
2296 printf("(\\r)");
2297 } else if(c == 0x1b) {
2298 printf("(\\e)");
2299 } else {
2300 printf("(%02x)", c);
2301 }
2302 }
2303 printf("ESC\\\n");
2304 }
2305
2306 void
2307 strreset(void) {
2308 memset(&strescseq, 0, sizeof(strescseq));
2309 }
2310
2311 void
2312 tprinter(char *s, size_t len) {
2313 if(iofd != -1 && xwrite(iofd, s, len) < 0) {
2314 fprintf(stderr, "Error writing in %s:%s\n",
2315 opt_io, strerror(errno));
2316 close(iofd);
2317 iofd = -1;
2318 }
2319 }
2320
2321 void
2322 toggleprinter(const Arg *arg) {
2323 term.mode ^= MODE_PRINT;
2324 }
2325
2326 void
2327 printscreen(const Arg *arg) {
2328 tdump();
2329 }
2330
2331 void
2332 printsel(const Arg *arg) {
2333 tdumpsel();
2334 }
2335
2336 void
2337 tdumpsel(void) {
2338 char *ptr;
2339
2340 if((ptr = getsel())) {
2341 tprinter(ptr, strlen(ptr));
2342 free(ptr);
2343 }
2344 }
2345
2346 void
2347 tdumpline(int n) {
2348 Glyph *bp, *end;
2349
2350 bp = &term.line[n][0];
2351 end = &bp[MIN(tlinelen(n), term.col) - 1];
2352 if(bp != end || bp->c[0] != ' ') {
2353 for( ;bp <= end; ++bp)
2354 tprinter(bp->c, utf8len(bp->c));
2355 }
2356 tprinter("\n", 1);
2357 }
2358
2359 void
2360 tdump(void) {
2361 int i;
2362
2363 for(i = 0; i < term.row; ++i)
2364 tdumpline(i);
2365 }
2366
2367 void
2368 tputtab(int n) {
2369 uint x = term.c.x;
2370
2371 if(n > 0) {
2372 while(x < term.col && n--)
2373 for(++x; x < term.col && !term.tabs[x]; ++x)
2374 /* nothing */ ;
2375 } else if(n < 0) {
2376 while(x > 0 && n++)
2377 for(--x; x > 0 && !term.tabs[x]; --x)
2378 /* nothing */ ;
2379 }
2380 tmoveto(x, term.c.y);
2381 }
2382
2383 void
2384 techo(char *buf, int len) {
2385 for(; len > 0; buf++, len--) {
2386 char c = *buf;
2387
2388 if(ISCONTROL((uchar) c)) { /* control code */
2389 if(c & 0x80) {
2390 c &= 0x7f;
2391 tputc("^", 1);
2392 tputc("[", 1);
2393 } else if(c != '\n' && c != '\r' && c != '\t') {
2394 c ^= 0x40;
2395 tputc("^", 1);
2396 }
2397 tputc(&c, 1);
2398 } else {
2399 break;
2400 }
2401 }
2402 if(len)
2403 tputc(buf, len);
2404 }
2405
2406 void
2407 tdeftran(char ascii) {
2408 static char cs[] = "0B";
2409 static int vcs[] = {CS_GRAPHIC0, CS_USA};
2410 char *p;
2411
2412 if((p = strchr(cs, ascii)) == NULL) {
2413 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2414 } else {
2415 term.trantbl[term.icharset] = vcs[p - cs];
2416 }
2417 }
2418
2419 void
2420 tdectest(char c) {
2421 static char E[UTF_SIZ] = "E";
2422 int x, y;
2423
2424 if(c == '8') { /* DEC screen alignment test. */
2425 for(x = 0; x < term.col; ++x) {
2426 for(y = 0; y < term.row; ++y)
2427 tsetchar(E, &term.c.attr, x, y);
2428 }
2429 }
2430 }
2431
2432 void
2433 tstrsequence(uchar c) {
2434 if (c & 0x80) {
2435 switch (c) {
2436 case 0x90: /* DCS -- Device Control String */
2437 c = 'P';
2438 break;
2439 case 0x9f: /* APC -- Application Program Command */
2440 c = '_';
2441 break;
2442 case 0x9e: /* PM -- Privacy Message */
2443 c = '^';
2444 break;
2445 case 0x9d: /* OSC -- Operating System Command */
2446 c = ']';
2447 break;
2448 }
2449 }
2450 strreset();
2451 strescseq.type = c;
2452 term.esc |= ESC_STR;
2453 return;
2454 }
2455
2456 void
2457 tcontrolcode(uchar ascii) {
2458 static char question[UTF_SIZ] = "?";
2459
2460 switch(ascii) {
2461 case '\t': /* HT */
2462 tputtab(1);
2463 return;
2464 case '\b': /* BS */
2465 tmoveto(term.c.x-1, term.c.y);
2466 return;
2467 case '\r': /* CR */
2468 tmoveto(0, term.c.y);
2469 return;
2470 case '\f': /* LF */
2471 case '\v': /* VT */
2472 case '\n': /* LF */
2473 /* go to first col if the mode is set */
2474 tnewline(IS_SET(MODE_CRLF));
2475 return;
2476 case '\a': /* BEL */
2477 if(term.esc & ESC_STR_END) {
2478 /* backwards compatibility to xterm */
2479 strhandle();
2480 } else {
2481 if(!(xw.state & WIN_FOCUSED))
2482 xseturgency(1);
2483 if (bellvolume)
2484 XkbBell(xw.dpy, xw.win, bellvolume, (Atom)NULL);
2485 }
2486 break;
2487 case '\033': /* ESC */
2488 csireset();
2489 term.esc &= ~(ESC_CSI|ESC_ALTCHARSET|ESC_TEST);
2490 term.esc |= ESC_START;
2491 return;
2492 case '\016': /* SO (LS1 -- Locking shift 1) */
2493 case '\017': /* SI (LS0 -- Locking shift 0) */
2494 term.charset = 1 - (ascii - '\016');
2495 return;
2496 case '\032': /* SUB */
2497 tsetchar(question, &term.c.attr, term.c.x, term.c.y);
2498 case '\030': /* CAN */
2499 csireset();
2500 break;
2501 case '\005': /* ENQ (IGNORED) */
2502 case '\000': /* NUL (IGNORED) */
2503 case '\021': /* XON (IGNORED) */
2504 case '\023': /* XOFF (IGNORED) */
2505 case 0177: /* DEL (IGNORED) */
2506 return;
2507 case 0x84: /* TODO: IND */
2508 break;
2509 case 0x85: /* NEL -- Next line */
2510 tnewline(1); /* always go to first col */
2511 break;
2512 case 0x88: /* HTS -- Horizontal tab stop */
2513 term.tabs[term.c.x] = 1;
2514 break;
2515 case 0x8d: /* TODO: RI */
2516 case 0x8e: /* TODO: SS2 */
2517 case 0x8f: /* TODO: SS3 */
2518 case 0x98: /* TODO: SOS */
2519 break;
2520 case 0x9a: /* DECID -- Identify Terminal */
2521 ttywrite(vtiden, sizeof(vtiden) - 1);
2522 break;
2523 case 0x9b: /* TODO: CSI */
2524 case 0x9c: /* TODO: ST */
2525 break;
2526 case 0x90: /* DCS -- Device Control String */
2527 case 0x9f: /* APC -- Application Program Command */
2528 case 0x9e: /* PM -- Privacy Message */
2529 case 0x9d: /* OSC -- Operating System Command */
2530 tstrsequence(ascii);
2531 return;
2532 }
2533 /* only CAN, SUB, \a and C1 chars interrupt a sequence */
2534 term.esc &= ~(ESC_STR_END|ESC_STR);
2535 return;
2536 }
2537
2538 /*
2539 * returns 1 when the sequence is finished and it hasn't to read
2540 * more characters for this sequence, otherwise 0
2541 */
2542 int
2543 eschandle(uchar ascii) {
2544 switch(ascii) {
2545 case '[':
2546 term.esc |= ESC_CSI;
2547 return 0;
2548 case '#':
2549 term.esc |= ESC_TEST;
2550 return 0;
2551 case 'P': /* DCS -- Device Control String */
2552 case '_': /* APC -- Application Program Command */
2553 case '^': /* PM -- Privacy Message */
2554 case ']': /* OSC -- Operating System Command */
2555 case 'k': /* old title set compatibility */
2556 tstrsequence(ascii);
2557 return 0;
2558 case 'n': /* LS2 -- Locking shift 2 */
2559 case 'o': /* LS3 -- Locking shift 3 */
2560 term.charset = 2 + (ascii - 'n');
2561 break;
2562 case '(': /* GZD4 -- set primary charset G0 */
2563 case ')': /* G1D4 -- set secondary charset G1 */
2564 case '*': /* G2D4 -- set tertiary charset G2 */
2565 case '+': /* G3D4 -- set quaternary charset G3 */
2566 term.icharset = ascii - '(';
2567 term.esc |= ESC_ALTCHARSET;
2568 return 0;
2569 case 'D': /* IND -- Linefeed */
2570 if(term.c.y == term.bot) {
2571 tscrollup(term.top, 1);
2572 } else {
2573 tmoveto(term.c.x, term.c.y+1);
2574 }
2575 break;
2576 case 'E': /* NEL -- Next line */
2577 tnewline(1); /* always go to first col */
2578 break;
2579 case 'H': /* HTS -- Horizontal tab stop */
2580 term.tabs[term.c.x] = 1;
2581 break;
2582 case 'M': /* RI -- Reverse index */
2583 if(term.c.y == term.top) {
2584 tscrolldown(term.top, 1);
2585 } else {
2586 tmoveto(term.c.x, term.c.y-1);
2587 }
2588 break;
2589 case 'Z': /* DECID -- Identify Terminal */
2590 ttywrite(vtiden, sizeof(vtiden) - 1);
2591 break;
2592 case 'c': /* RIS -- Reset to inital state */
2593 treset();
2594 xresettitle();
2595 xloadcols();
2596 break;
2597 case '=': /* DECPAM -- Application keypad */
2598 term.mode |= MODE_APPKEYPAD;
2599 break;
2600 case '>': /* DECPNM -- Normal keypad */
2601 term.mode &= ~MODE_APPKEYPAD;
2602 break;
2603 case '7': /* DECSC -- Save Cursor */
2604 tcursor(CURSOR_SAVE);
2605 break;
2606 case '8': /* DECRC -- Restore Cursor */
2607 tcursor(CURSOR_LOAD);
2608 break;
2609 case '\\': /* ST -- String Terminator */
2610 if(term.esc & ESC_STR_END)
2611 strhandle();
2612 break;
2613 default:
2614 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2615 (uchar) ascii, isprint(ascii)? ascii:'.');
2616 break;
2617 }
2618 return 1;
2619 }
2620
2621 void
2622 tputc(char *c, int len) {
2623 uchar ascii;
2624 bool control;
2625 long unicodep;
2626 int width;
2627 Glyph *gp;
2628
2629 if(len == 1) {
2630 width = 1;
2631 unicodep = ascii = *c;
2632 } else {
2633 utf8decode(c, &unicodep, UTF_SIZ);
2634 if ((width = wcwidth(unicodep)) == -1) {
2635 c = "\357\277\275"; /* UTF_INVALID */
2636 width = 1;
2637 }
2638 control = ISCONTROLC1(unicodep);
2639 ascii = unicodep;
2640 }
2641
2642 if(IS_SET(MODE_PRINT))
2643 tprinter(c, len);
2644 control = ISCONTROL(unicodep);
2645
2646 /*
2647 * STR sequence must be checked before anything else
2648 * because it uses all following characters until it
2649 * receives a ESC, a SUB, a ST or any other C1 control
2650 * character.
2651 */
2652 if(term.esc & ESC_STR) {
2653 if(width == 1 &&
2654 (ascii == '\a' || ascii == 030 ||
2655 ascii == 032 || ascii == 033 ||
2656 ISCONTROLC1(unicodep))) {
2657 term.esc &= ~(ESC_START|ESC_STR);
2658 term.esc |= ESC_STR_END;
2659 } else if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2660 memmove(&strescseq.buf[strescseq.len], c, len);
2661 strescseq.len += len;
2662 return;
2663 } else {
2664 /*
2665 * Here is a bug in terminals. If the user never sends
2666 * some code to stop the str or esc command, then st
2667 * will stop responding. But this is better than
2668 * silently failing with unknown characters. At least
2669 * then users will report back.
2670 *
2671 * In the case users ever get fixed, here is the code:
2672 */
2673 /*
2674 * term.esc = 0;
2675 * strhandle();
2676 */
2677 return;
2678 }
2679 }
2680
2681 /*
2682 * Actions of control codes must be performed as soon they arrive
2683 * because they can be embedded inside a control sequence, and
2684 * they must not cause conflicts with sequences.
2685 */
2686 if(control) {
2687 tcontrolcode(ascii);
2688 /*
2689 * control codes are not shown ever
2690 */
2691 return;
2692 } else if(term.esc & ESC_START) {
2693 if(term.esc & ESC_CSI) {
2694 csiescseq.buf[csiescseq.len++] = ascii;
2695 if(BETWEEN(ascii, 0x40, 0x7E)
2696 || csiescseq.len >= \
2697 sizeof(csiescseq.buf)-1) {
2698 term.esc = 0;
2699 csiparse();
2700 csihandle();
2701 }
2702 return;
2703 } else if(term.esc & ESC_ALTCHARSET) {
2704 tdeftran(ascii);
2705 } else if(term.esc & ESC_TEST) {
2706 tdectest(ascii);
2707 } else {
2708 if (!eschandle(ascii))
2709 return;
2710 /* sequence already finished */
2711 }
2712 term.esc = 0;
2713 /*
2714 * All characters which form part of a sequence are not
2715 * printed
2716 */
2717 return;
2718 }
2719 if(sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
2720 selclear(NULL);
2721
2722 gp = &term.line[term.c.y][term.c.x];
2723 if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2724 gp->mode |= ATTR_WRAP;
2725 tnewline(1);
2726 gp = &term.line[term.c.y][term.c.x];
2727 }
2728
2729 if(IS_SET(MODE_INSERT) && term.c.x+width < term.col)
2730 memmove(gp+width, gp, (term.col - term.c.x - width) * sizeof(Glyph));
2731
2732 if(term.c.x+width > term.col) {
2733 tnewline(1);
2734 gp = &term.line[term.c.y][term.c.x];
2735 }
2736
2737 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2738
2739 if(width == 2) {
2740 gp->mode |= ATTR_WIDE;
2741 if(term.c.x+1 < term.col) {
2742 gp[1].c[0] = '\0';
2743 gp[1].mode = ATTR_WDUMMY;
2744 }
2745 }
2746 if(term.c.x+width < term.col) {
2747 tmoveto(term.c.x+width, term.c.y);
2748 } else {
2749 term.c.state |= CURSOR_WRAPNEXT;
2750 }
2751 }
2752
2753 void
2754 tresize(int col, int row) {
2755 int i;
2756 int minrow = MIN(row, term.row);
2757 int mincol = MIN(col, term.col);
2758 int slide = term.c.y - row + 1;
2759 bool *bp;
2760 TCursor c;
2761
2762 if(col < 1 || row < 1) {
2763 fprintf(stderr,
2764 "tresize: error resizing to %dx%d\n", col, row);
2765 return;
2766 }
2767
2768 /* free unneeded rows */
2769 i = 0;
2770 if(slide > 0) {
2771 /*
2772 * slide screen to keep cursor where we expect it -
2773 * tscrollup would work here, but we can optimize to
2774 * memmove because we're freeing the earlier lines
2775 */
2776 for(/* i = 0 */; i < slide; i++) {
2777 free(term.line[i]);
2778 free(term.alt[i]);
2779 }
2780 memmove(term.line, term.line + slide, row * sizeof(Line));
2781 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2782 }
2783 for(i += row; i < term.row; i++) {
2784 free(term.line[i]);
2785 free(term.alt[i]);
2786 }
2787
2788 /* resize to new height */
2789 term.line = xrealloc(term.line, row * sizeof(Line));
2790 term.alt = xrealloc(term.alt, row * sizeof(Line));
2791 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2792 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2793
2794 /* resize each row to new width, zero-pad if needed */
2795 for(i = 0; i < minrow; i++) {
2796 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2797 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2798 }
2799
2800 /* allocate any new rows */
2801 for(/* i == minrow */; i < row; i++) {
2802 term.line[i] = xmalloc(col * sizeof(Glyph));
2803 term.alt[i] = xmalloc(col * sizeof(Glyph));
2804 }
2805 if(col > term.col) {
2806 bp = term.tabs + term.col;
2807
2808 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2809 while(--bp > term.tabs && !*bp)
2810 /* nothing */ ;
2811 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2812 *bp = 1;
2813 }
2814 /* update terminal size */
2815 term.col = col;
2816 term.row = row;
2817 /* reset scrolling region */
2818 tsetscroll(0, row-1);
2819 /* make use of the LIMIT in tmoveto */
2820 tmoveto(term.c.x, term.c.y);
2821 /* Clearing both screens (it makes dirty all lines) */
2822 c = term.c;
2823 for(i = 0; i < 2; i++) {
2824 if(mincol < col && 0 < minrow) {
2825 tclearregion(mincol, 0, col - 1, minrow - 1);
2826 }
2827 if(0 < col && minrow < row) {
2828 tclearregion(0, minrow, col - 1, row - 1);
2829 }
2830 tswapscreen();
2831 tcursor(CURSOR_LOAD);
2832 }
2833 term.c = c;
2834 }
2835
2836 void
2837 xresize(int col, int row) {
2838 xw.tw = MAX(1, col * xw.cw);
2839 xw.th = MAX(1, row * xw.ch);
2840
2841 XFreePixmap(xw.dpy, xw.buf);
2842 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2843 DefaultDepth(xw.dpy, xw.scr));
2844 XftDrawChange(xw.draw, xw.buf);
2845 xclear(0, 0, xw.w, xw.h);
2846 }
2847
2848 static inline ushort
2849 sixd_to_16bit(int x) {
2850 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2851 }
2852
2853 void
2854 xloadcols(void) {
2855 int i;
2856 XRenderColor color = { .alpha = 0xffff };
2857 static bool loaded;
2858 Color *cp;
2859
2860 if(loaded) {
2861 for (cp = dc.col; cp < dc.col + LEN(dc.col); ++cp)
2862 XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
2863 }
2864
2865 /* load colors [0-15] and [256-LEN(colorname)] (config.h) */
2866 for(i = 0; i < LEN(colorname); i++) {
2867 if(!colorname[i])
2868 continue;
2869 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2870 die("Could not allocate color '%s'\n", colorname[i]);
2871 }
2872 }
2873
2874 /* load colors [16-231] ; same colors as xterm */
2875 for(i = 16; i < 6*6*6+16; i++) {
2876 color.red = sixd_to_16bit( ((i-16)/36)%6 );
2877 color.green = sixd_to_16bit( ((i-16)/6) %6 );
2878 color.blue = sixd_to_16bit( ((i-16)/1) %6 );
2879 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i]))
2880 die("Could not allocate color %d\n", i);
2881 }
2882
2883 /* load colors [232-255] ; grayscale */
2884 for(; i < 256; i++) {
2885 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (i-(6*6*6+16));
2886 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i]))
2887 die("Could not allocate color %d\n", i);
2888 }
2889 loaded = true;
2890 }
2891
2892 int
2893 xsetcolorname(int x, const char *name) {
2894 XRenderColor color = { .alpha = 0xffff };
2895 Color ncolor;
2896
2897 if(!BETWEEN(x, 0, LEN(colorname)))
2898 return 1;
2899
2900 if(!name) {
2901 if(BETWEEN(x, 16, 16 + 215)) { /* 256 color */
2902 color.red = sixd_to_16bit( ((x-16)/36)%6 );
2903 color.green = sixd_to_16bit( ((x-16)/6) %6 );
2904 color.blue = sixd_to_16bit( ((x-16)/1) %6 );
2905 if(!XftColorAllocValue(xw.dpy, xw.vis,
2906 xw.cmap, &color, &ncolor)) {
2907 return 1;
2908 }
2909
2910 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2911 dc.col[x] = ncolor;
2912 return 0;
2913 } else if(BETWEEN(x, 16 + 216, 255)) { /* greyscale */
2914 color.red = color.green = color.blue = \
2915 0x0808 + 0x0a0a * (x - (16 + 216));
2916 if(!XftColorAllocValue(xw.dpy, xw.vis,
2917 xw.cmap, &color, &ncolor)) {
2918 return 1;
2919 }
2920
2921 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2922 dc.col[x] = ncolor;
2923 return 0;
2924 } else { /* system colors */
2925 name = colorname[x];
2926 }
2927 }
2928 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &ncolor))
2929 return 1;
2930
2931 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2932 dc.col[x] = ncolor;
2933 return 0;
2934 }
2935
2936 void
2937 xtermclear(int col1, int row1, int col2, int row2) {
2938 XftDrawRect(xw.draw,
2939 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2940 borderpx + col1 * xw.cw,
2941 borderpx + row1 * xw.ch,
2942 (col2-col1+1) * xw.cw,
2943 (row2-row1+1) * xw.ch);
2944 }
2945
2946 /*
2947 * Absolute coordinates.
2948 */
2949 void
2950 xclear(int x1, int y1, int x2, int y2) {
2951 XftDrawRect(xw.draw,
2952 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2953 x1, y1, x2-x1, y2-y1);
2954 }
2955
2956 void
2957 xhints(void) {
2958 XClassHint class = {opt_class ? opt_class : termname, termname};
2959 XWMHints wm = {.flags = InputHint, .input = 1};
2960 XSizeHints *sizeh = NULL;
2961
2962 sizeh = XAllocSizeHints();
2963
2964 sizeh->flags = PSize | PResizeInc | PBaseSize;
2965 sizeh->height = xw.h;
2966 sizeh->width = xw.w;
2967 sizeh->height_inc = xw.ch;
2968 sizeh->width_inc = xw.cw;
2969 sizeh->base_height = 2 * borderpx;
2970 sizeh->base_width = 2 * borderpx;
2971 if(xw.isfixed == True) {
2972 sizeh->flags |= PMaxSize | PMinSize;
2973 sizeh->min_width = sizeh->max_width = xw.w;
2974 sizeh->min_height = sizeh->max_height = xw.h;
2975 }
2976 if(xw.gm & (XValue|YValue)) {
2977 sizeh->flags |= USPosition | PWinGravity;
2978 sizeh->x = xw.l;
2979 sizeh->y = xw.t;
2980 sizeh->win_gravity = xgeommasktogravity(xw.gm);
2981 }
2982
2983 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
2984 &class);
2985 XFree(sizeh);
2986 }
2987
2988 int
2989 xgeommasktogravity(int mask) {
2990 switch(mask & (XNegative|YNegative)) {
2991 case 0:
2992 return NorthWestGravity;
2993 case XNegative:
2994 return NorthEastGravity;
2995 case YNegative:
2996 return SouthWestGravity;
2997 }
2998 return SouthEastGravity;
2999 }
3000
3001 int
3002 xloadfont(Font *f, FcPattern *pattern) {
3003 FcPattern *match;
3004 FcResult result;
3005
3006 match = FcFontMatch(NULL, pattern, &result);
3007 if(!match)
3008 return 1;
3009
3010 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
3011 FcPatternDestroy(match);
3012 return 1;
3013 }
3014
3015 f->set = NULL;
3016 f->pattern = FcPatternDuplicate(pattern);
3017
3018 f->ascent = f->match->ascent;
3019 f->descent = f->match->descent;
3020 f->lbearing = 0;
3021 f->rbearing = f->match->max_advance_width;
3022
3023 f->height = f->ascent + f->descent;
3024 f->width = f->lbearing + f->rbearing;
3025
3026 return 0;
3027 }
3028
3029 void
3030 xloadfonts(char *fontstr, double fontsize) {
3031 FcPattern *pattern;
3032 FcResult r_sz, r_psz;
3033 double fontval;
3034 float ceilf(float);
3035
3036 if(fontstr[0] == '-') {
3037 pattern = XftXlfdParse(fontstr, False, False);
3038 } else {
3039 pattern = FcNameParse((FcChar8 *)fontstr);
3040 }
3041
3042 if(!pattern)
3043 die("st: can't open font %s\n", fontstr);
3044
3045 if(fontsize > 1) {
3046 FcPatternDel(pattern, FC_PIXEL_SIZE);
3047 FcPatternDel(pattern, FC_SIZE);
3048 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
3049 usedfontsize = fontsize;
3050 } else {
3051 r_psz = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
3052 r_sz = FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval);
3053 if(r_psz == FcResultMatch) {
3054 usedfontsize = fontval;
3055 } else if(r_sz == FcResultMatch) {
3056 usedfontsize = -1;
3057 } else {
3058 /*
3059 * Default font size is 12, if none given. This is to
3060 * have a known usedfontsize value.
3061 */
3062 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
3063 usedfontsize = 12;
3064 }
3065 defaultfontsize = usedfontsize;
3066 }
3067
3068 FcConfigSubstitute(0, pattern, FcMatchPattern);
3069 FcDefaultSubstitute(pattern);
3070
3071 if(xloadfont(&dc.font, pattern))
3072 die("st: can't open font %s\n", fontstr);
3073
3074 if(usedfontsize < 0) {
3075 FcPatternGetDouble(dc.font.match->pattern,
3076 FC_PIXEL_SIZE, 0, &fontval);
3077 usedfontsize = fontval;
3078 if(fontsize == 0)
3079 defaultfontsize = fontval;
3080 }
3081
3082 /* Setting character width and height. */
3083 xw.cw = ceilf(dc.font.width * cwscale);
3084 xw.ch = ceilf(dc.font.height * chscale);
3085
3086 FcPatternDel(pattern, FC_SLANT);
3087 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
3088 if(xloadfont(&dc.ifont, pattern))
3089 die("st: can't open font %s\n", fontstr);
3090
3091 FcPatternDel(pattern, FC_WEIGHT);
3092 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
3093 if(xloadfont(&dc.ibfont, pattern))
3094 die("st: can't open font %s\n", fontstr);
3095
3096 FcPatternDel(pattern, FC_SLANT);
3097 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
3098 if(xloadfont(&dc.bfont, pattern))
3099 die("st: can't open font %s\n", fontstr);
3100
3101 FcPatternDestroy(pattern);
3102 }
3103
3104 int
3105 xloadfontset(Font *f) {
3106 FcResult result;
3107
3108 if(!(f->set = FcFontSort(0, f->pattern, FcTrue, 0, &result)))
3109 return 1;
3110 return 0;
3111 }
3112
3113 void
3114 xunloadfont(Font *f) {
3115 XftFontClose(xw.dpy, f->match);
3116 FcPatternDestroy(f->pattern);
3117 if(f->set)
3118 FcFontSetDestroy(f->set);
3119 }
3120
3121 void
3122 xunloadfonts(void) {
3123 /* Free the loaded fonts in the font cache. */
3124 while(frclen > 0)
3125 XftFontClose(xw.dpy, frc[--frclen].font);
3126
3127 xunloadfont(&dc.font);
3128 xunloadfont(&dc.bfont);
3129 xunloadfont(&dc.ifont);
3130 xunloadfont(&dc.ibfont);
3131 }
3132
3133 void
3134 xzoom(const Arg *arg) {
3135 Arg larg;
3136
3137 larg.i = usedfontsize + arg->i;
3138 xzoomabs(&larg);
3139 }
3140
3141 void
3142 xzoomabs(const Arg *arg) {
3143 xunloadfonts();
3144 xloadfonts(usedfont, arg->i);
3145 cresize(0, 0);
3146 redraw();
3147 xhints();
3148 }
3149
3150 void
3151 xzoomreset(const Arg *arg) {
3152 Arg larg;
3153
3154 if(defaultfontsize > 0) {
3155 larg.i = defaultfontsize;
3156 xzoomabs(&larg);
3157 }
3158 }
3159
3160 void
3161 xinit(void) {
3162 XGCValues gcvalues;
3163 Cursor cursor;
3164 Window parent;
3165 pid_t thispid = getpid();
3166
3167 if(!(xw.dpy = XOpenDisplay(NULL)))
3168 die("Can't open display\n");
3169 xw.scr = XDefaultScreen(xw.dpy);
3170 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
3171
3172 /* font */
3173 if(!FcInit())
3174 die("Could not init fontconfig.\n");
3175
3176 usedfont = (opt_font == NULL)? font : opt_font;
3177 xloadfonts(usedfont, 0);
3178
3179 /* colors */
3180 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
3181 xloadcols();
3182
3183 /* adjust fixed window geometry */
3184 xw.w = 2 * borderpx + term.col * xw.cw;
3185 xw.h = 2 * borderpx + term.row * xw.ch;
3186 if(xw.gm & XNegative)
3187 xw.l += DisplayWidth(xw.dpy, xw.scr) - xw.w - 2;
3188 if(xw.gm & YNegative)
3189 xw.t += DisplayWidth(xw.dpy, xw.scr) - xw.h - 2;
3190
3191 /* Events */
3192 xw.attrs.background_pixel = dc.col[defaultbg].pixel;
3193 xw.attrs.border_pixel = dc.col[defaultbg].pixel;
3194 xw.attrs.bit_gravity = NorthWestGravity;
3195 xw.attrs.event_mask = FocusChangeMask | KeyPressMask
3196 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
3197 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
3198 xw.attrs.colormap = xw.cmap;
3199
3200 if (!(opt_embed && (parent = strtol(opt_embed, NULL, 0))))
3201 parent = XRootWindow(xw.dpy, xw.scr);
3202 xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
3203 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
3204 xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
3205 | CWEventMask | CWColormap, &xw.attrs);
3206
3207 memset(&gcvalues, 0, sizeof(gcvalues));
3208 gcvalues.graphics_exposures = False;
3209 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
3210 &gcvalues);
3211 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
3212 DefaultDepth(xw.dpy, xw.scr));
3213 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
3214 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
3215
3216 /* Xft rendering context */
3217 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
3218
3219 /* input methods */
3220 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3221 XSetLocaleModifiers("@im=local");
3222 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3223 XSetLocaleModifiers("@im=");
3224 if((xw.xim = XOpenIM(xw.dpy,
3225 NULL, NULL, NULL)) == NULL) {
3226 die("XOpenIM failed. Could not open input"
3227 " device.\n");
3228 }
3229 }
3230 }
3231 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
3232 | XIMStatusNothing, XNClientWindow, xw.win,
3233 XNFocusWindow, xw.win, NULL);
3234 if(xw.xic == NULL)
3235 die("XCreateIC failed. Could not obtain input method.\n");
3236
3237 /* white cursor, black outline */
3238 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
3239 XDefineCursor(xw.dpy, xw.win, cursor);
3240 XRecolorCursor(xw.dpy, cursor,
3241 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
3242 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
3243
3244 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
3245 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
3246 xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
3247 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
3248
3249 xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
3250 XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
3251 PropModeReplace, (uchar *)&thispid, 1);
3252
3253 xresettitle();
3254 XMapWindow(xw.dpy, xw.win);
3255 xhints();
3256 XSync(xw.dpy, False);
3257 }
3258
3259 void
3260 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
3261 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
3262 width = charlen * xw.cw, xp, i;
3263 int frcflags, charexists;
3264 int u8fl, u8fblen, u8cblen, doesexist;
3265 char *u8c, *u8fs;
3266 long unicodep;
3267 Font *font = &dc.font;
3268 FcResult fcres;
3269 FcPattern *fcpattern, *fontpattern;
3270 FcFontSet *fcsets[] = { NULL };
3271 FcCharSet *fccharset;
3272 Color *fg, *bg, *temp, revfg, revbg, truefg, truebg;
3273 XRenderColor colfg, colbg;
3274 XRectangle r;
3275 int oneatatime;
3276
3277 frcflags = FRC_NORMAL;
3278
3279 if(base.mode & ATTR_ITALIC) {
3280 if(base.fg == defaultfg)
3281 base.fg = defaultitalic;
3282 font = &dc.ifont;
3283 frcflags = FRC_ITALIC;
3284 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
3285 if(base.fg == defaultfg)
3286 base.fg = defaultitalic;
3287 font = &dc.ibfont;
3288 frcflags = FRC_ITALICBOLD;
3289 } else if(base.mode & ATTR_UNDERLINE) {
3290 if(base.fg == defaultfg)
3291 base.fg = defaultunderline;
3292 }
3293
3294 if(IS_TRUECOL(base.fg)) {
3295 colfg.alpha = 0xffff;
3296 colfg.red = TRUERED(base.fg);
3297 colfg.green = TRUEGREEN(base.fg);
3298 colfg.blue = TRUEBLUE(base.fg);
3299 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
3300 fg = &truefg;
3301 } else {
3302 fg = &dc.col[base.fg];
3303 }
3304
3305 if(IS_TRUECOL(base.bg)) {
3306 colbg.alpha = 0xffff;
3307 colbg.green = TRUEGREEN(base.bg);
3308 colbg.red = TRUERED(base.bg);
3309 colbg.blue = TRUEBLUE(base.bg);
3310 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
3311 bg = &truebg;
3312 } else {
3313 bg = &dc.col[base.bg];
3314 }
3315
3316 if(base.mode & ATTR_BOLD) {
3317 /*
3318 * change basic system colors [0-7]
3319 * to bright system colors [8-15]
3320 */
3321 if(BETWEEN(base.fg, 0, 7) && !(base.mode & ATTR_FAINT))
3322 fg = &dc.col[base.fg + 8];
3323
3324 if(base.mode & ATTR_ITALIC) {
3325 font = &dc.ibfont;
3326 frcflags = FRC_ITALICBOLD;
3327 } else {
3328 font = &dc.bfont;
3329 frcflags = FRC_BOLD;
3330 }
3331 }
3332
3333 if(IS_SET(MODE_REVERSE)) {
3334 if(fg == &dc.col[defaultfg]) {
3335 fg = &dc.col[defaultbg];
3336 } else {
3337 colfg.red = ~fg->color.red;
3338 colfg.green = ~fg->color.green;
3339 colfg.blue = ~fg->color.blue;
3340 colfg.alpha = fg->color.alpha;
3341 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
3342 &revfg);
3343 fg = &revfg;
3344 }
3345
3346 if(bg == &dc.col[defaultbg]) {
3347 bg = &dc.col[defaultfg];
3348 } else {
3349 colbg.red = ~bg->color.red;
3350 colbg.green = ~bg->color.green;
3351 colbg.blue = ~bg->color.blue;
3352 colbg.alpha = bg->color.alpha;
3353 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
3354 &revbg);
3355 bg = &revbg;
3356 }
3357 }
3358
3359 if(base.mode & ATTR_REVERSE) {
3360 temp = fg;
3361 fg = bg;
3362 bg = temp;
3363 }
3364
3365 if(base.mode & ATTR_FAINT && !(base.mode & ATTR_BOLD)) {
3366 colfg.red = fg->color.red / 2;
3367 colfg.green = fg->color.green / 2;
3368 colfg.blue = fg->color.blue / 2;
3369 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
3370 fg = &revfg;
3371 }
3372
3373 if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
3374 fg = bg;
3375
3376 if(base.mode & ATTR_INVISIBLE)
3377 fg = bg;
3378
3379 /* Intelligent cleaning up of the borders. */
3380 if(x == 0) {
3381 xclear(0, (y == 0)? 0 : winy, borderpx,
3382 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
3383 }
3384 if(x + charlen >= term.col) {
3385 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
3386 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
3387 }
3388 if(y == 0)
3389 xclear(winx, 0, winx + width, borderpx);
3390 if(y == term.row-1)
3391 xclear(winx, winy + xw.ch, winx + width, xw.h);
3392
3393 /* Clean up the region we want to draw to. */
3394 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
3395
3396 /* Set the clip region because Xft is sometimes dirty. */
3397 r.x = 0;
3398 r.y = 0;
3399 r.height = xw.ch;
3400 r.width = width;
3401 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
3402
3403 for(xp = winx; bytelen > 0;) {
3404 /*
3405 * Search for the range in the to be printed string of glyphs
3406 * that are in the main font. Then print that range. If
3407 * some glyph is found that is not in the font, do the
3408 * fallback dance.
3409 */
3410 u8fs = s;
3411 u8fblen = 0;
3412 u8fl = 0;
3413 oneatatime = font->width != xw.cw;
3414 for(;;) {
3415 u8c = s;
3416 u8cblen = utf8decode(s, &unicodep, UTF_SIZ);
3417 s += u8cblen;
3418 bytelen -= u8cblen;
3419
3420 doesexist = XftCharExists(xw.dpy, font->match, unicodep);
3421 if(doesexist) {
3422 u8fl++;
3423 u8fblen += u8cblen;
3424 if(!oneatatime && bytelen > 0)
3425 continue;
3426 }
3427
3428 if(u8fl > 0) {
3429 XftDrawStringUtf8(xw.draw, fg,
3430 font->match, xp,
3431 winy + font->ascent,
3432 (FcChar8 *)u8fs,
3433 u8fblen);
3434 xp += xw.cw * u8fl;
3435 }
3436 break;
3437 }
3438 if(doesexist) {
3439 if(oneatatime)
3440 continue;
3441 break;
3442 }
3443
3444 /* Search the font cache. */
3445 for(i = 0; i < frclen; i++) {
3446 charexists = XftCharExists(xw.dpy, frc[i].font, unicodep);
3447 /* Everything correct. */
3448 if(charexists && frc[i].flags == frcflags)
3449 break;
3450 /* We got a default font for a not found glyph. */
3451 if(!charexists && frc[i].flags == frcflags \
3452 && frc[i].unicodep == unicodep) {
3453 break;
3454 }
3455 }
3456
3457 /* Nothing was found. */
3458 if(i >= frclen) {
3459 if(!font->set)
3460 xloadfontset(font);
3461 fcsets[0] = font->set;
3462
3463 /*
3464 * Nothing was found in the cache. Now use
3465 * some dozen of Fontconfig calls to get the
3466 * font for one single character.
3467 *
3468 * Xft and fontconfig are design failures.
3469 */
3470 fcpattern = FcPatternDuplicate(font->pattern);
3471 fccharset = FcCharSetCreate();
3472
3473 FcCharSetAddChar(fccharset, unicodep);
3474 FcPatternAddCharSet(fcpattern, FC_CHARSET,
3475 fccharset);
3476 FcPatternAddBool(fcpattern, FC_SCALABLE,
3477 FcTrue);
3478
3479 FcConfigSubstitute(0, fcpattern,
3480 FcMatchPattern);
3481 FcDefaultSubstitute(fcpattern);
3482
3483 fontpattern = FcFontSetMatch(0, fcsets, 1,
3484 fcpattern, &fcres);
3485
3486 /*
3487 * Overwrite or create the new cache entry.
3488 */
3489 if(frclen >= LEN(frc)) {
3490 frclen = LEN(frc) - 1;
3491 XftFontClose(xw.dpy, frc[frclen].font);
3492 frc[frclen].unicodep = 0;
3493 }
3494
3495 frc[frclen].font = XftFontOpenPattern(xw.dpy,
3496 fontpattern);
3497 frc[frclen].flags = frcflags;
3498 frc[frclen].unicodep = unicodep;
3499
3500 i = frclen;
3501 frclen++;
3502
3503 FcPatternDestroy(fcpattern);
3504 FcCharSetDestroy(fccharset);
3505 }
3506
3507 XftDrawStringUtf8(xw.draw, fg, frc[i].font,
3508 xp, winy + frc[i].font->ascent,
3509 (FcChar8 *)u8c, u8cblen);
3510
3511 xp += xw.cw * wcwidth(unicodep);
3512 }
3513
3514 /*
3515 * This is how the loop above actually should be. Why does the
3516 * application have to care about font details?
3517 *
3518 * I have to repeat: Xft and Fontconfig are design failures.
3519 */
3520 /*
3521 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
3522 winy + font->ascent, (FcChar8 *)s, bytelen);
3523 */
3524
3525 if(base.mode & ATTR_UNDERLINE) {
3526 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
3527 width, 1);
3528 }
3529
3530 if(base.mode & ATTR_STRUCK) {
3531 XftDrawRect(xw.draw, fg, winx, winy + 2 * font->ascent / 3,
3532 width, 1);
3533 }
3534
3535 /* Reset clip to none. */
3536 XftDrawSetClip(xw.draw, 0);
3537 }
3538
3539 void
3540 xdrawcursor(void) {
3541 static int oldx = 0, oldy = 0;
3542 int sl, width, curx;
3543 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
3544
3545 LIMIT(oldx, 0, term.col-1);
3546 LIMIT(oldy, 0, term.row-1);
3547
3548 curx = term.c.x;
3549
3550 /* adjust position if in dummy */
3551 if(term.line[oldy][oldx].mode & ATTR_WDUMMY)
3552 oldx--;
3553 if(term.line[term.c.y][curx].mode & ATTR_WDUMMY)
3554 curx--;
3555
3556 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
3557
3558 /* remove the old cursor */
3559 sl = utf8len(term.line[oldy][oldx].c);
3560 width = (term.line[oldy][oldx].mode & ATTR_WIDE)? 2 : 1;
3561 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
3562 oldy, width, sl);
3563
3564 if(IS_SET(MODE_HIDE))
3565 return;
3566
3567 /* draw the new one */
3568 if(xw.state & WIN_FOCUSED) {
3569 switch (xw.cursor) {
3570 case 0: /* Blinking Block */
3571 case 1: /* Blinking Block (Default) */
3572 case 2: /* Steady Block */
3573 if(IS_SET(MODE_REVERSE)) {
3574 g.mode |= ATTR_REVERSE;
3575 g.fg = defaultcs;
3576 g.bg = defaultfg;
3577 }
3578
3579 sl = utf8len(g.c);
3580 width = (term.line[term.c.y][curx].mode & ATTR_WIDE)\
3581 ? 2 : 1;
3582 xdraws(g.c, g, term.c.x, term.c.y, width, sl);
3583 break;
3584 case 3: /* Blinking Underline */
3585 case 4: /* Steady Underline */
3586 XftDrawRect(xw.draw, &dc.col[defaultcs],
3587 borderpx + curx * xw.cw,
3588 borderpx + (term.c.y + 1) * xw.ch - 1,
3589 xw.cw, 1);
3590 break;
3591 case 5: /* Blinking bar */
3592 case 6: /* Steady bar */
3593 XftDrawRect(xw.draw, &dc.col[defaultcs],
3594 borderpx + curx * xw.cw,
3595 borderpx + term.c.y * xw.ch,
3596 1, xw.ch);
3597 break;
3598 }
3599 } else {
3600 XftDrawRect(xw.draw, &dc.col[defaultcs],
3601 borderpx + curx * xw.cw,
3602 borderpx + term.c.y * xw.ch,
3603 xw.cw - 1, 1);
3604 XftDrawRect(xw.draw, &dc.col[defaultcs],
3605 borderpx + curx * xw.cw,
3606 borderpx + term.c.y * xw.ch,
3607 1, xw.ch - 1);
3608 XftDrawRect(xw.draw, &dc.col[defaultcs],
3609 borderpx + (curx + 1) * xw.cw - 1,
3610 borderpx + term.c.y * xw.ch,
3611 1, xw.ch - 1);
3612 XftDrawRect(xw.draw, &dc.col[defaultcs],
3613 borderpx + curx * xw.cw,
3614 borderpx + (term.c.y + 1) * xw.ch - 1,
3615 xw.cw, 1);
3616 }
3617 oldx = curx, oldy = term.c.y;
3618 }
3619
3620
3621 void
3622 xsettitle(char *p) {
3623 XTextProperty prop;
3624
3625 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3626 &prop);
3627 XSetWMName(xw.dpy, xw.win, &prop);
3628 XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
3629 XFree(prop.value);
3630 }
3631
3632 void
3633 xresettitle(void) {
3634 xsettitle(opt_title ? opt_title : "st");
3635 }
3636
3637 void
3638 redraw(void) {
3639 tfulldirt();
3640 draw();
3641 }
3642
3643 void
3644 draw(void) {
3645 drawregion(0, 0, term.col, term.row);
3646 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3647 xw.h, 0, 0);
3648 XSetForeground(xw.dpy, dc.gc,
3649 dc.col[IS_SET(MODE_REVERSE)?
3650 defaultfg : defaultbg].pixel);
3651 }
3652
3653 void
3654 drawregion(int x1, int y1, int x2, int y2) {
3655 int ic, ib, x, y, ox, sl;
3656 Glyph base, new;
3657 char buf[DRAW_BUF_SIZ];
3658 bool ena_sel = sel.ob.x != -1 && sel.alt == IS_SET(MODE_ALTSCREEN);
3659 long unicodep;
3660
3661 if(!(xw.state & WIN_VISIBLE))
3662 return;
3663
3664 for(y = y1; y < y2; y++) {
3665 if(!term.dirty[y])
3666 continue;
3667
3668 xtermclear(0, y, term.col, y);
3669 term.dirty[y] = 0;
3670 base = term.line[y][0];
3671 ic = ib = ox = 0;
3672 for(x = x1; x < x2; x++) {
3673 new = term.line[y][x];
3674 if(new.mode == ATTR_WDUMMY)
3675 continue;
3676 if(ena_sel && selected(x, y))
3677 new.mode ^= ATTR_REVERSE;
3678 if(ib > 0 && (ATTRCMP(base, new)
3679 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3680 xdraws(buf, base, ox, y, ic, ib);
3681 ic = ib = 0;
3682 }
3683 if(ib == 0) {
3684 ox = x;
3685 base = new;
3686 }
3687
3688 sl = utf8decode(new.c, &unicodep, UTF_SIZ);
3689 memcpy(buf+ib, new.c, sl);
3690 ib += sl;
3691 ic += (new.mode & ATTR_WIDE)? 2 : 1;
3692 }
3693 if(ib > 0)
3694 xdraws(buf, base, ox, y, ic, ib);
3695 }
3696 xdrawcursor();
3697 }
3698
3699 void
3700 expose(XEvent *ev) {
3701 XExposeEvent *e = &ev->xexpose;
3702
3703 if(xw.state & WIN_REDRAW) {
3704 if(!e->count)
3705 xw.state &= ~WIN_REDRAW;
3706 }
3707 redraw();
3708 }
3709
3710 void
3711 visibility(XEvent *ev) {
3712 XVisibilityEvent *e = &ev->xvisibility;
3713
3714 if(e->state == VisibilityFullyObscured) {
3715 xw.state &= ~WIN_VISIBLE;
3716 } else if(!(xw.state & WIN_VISIBLE)) {
3717 /* need a full redraw for next Expose, not just a buf copy */
3718 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3719 }
3720 }
3721
3722 void
3723 unmap(XEvent *ev) {
3724 xw.state &= ~WIN_VISIBLE;
3725 }
3726
3727 void
3728 xsetpointermotion(int set) {
3729 MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
3730 XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
3731 }
3732
3733 void
3734 xseturgency(int add) {
3735 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3736
3737 MODBIT(h->flags, add, XUrgencyHint);
3738 XSetWMHints(xw.dpy, xw.win, h);
3739 XFree(h);
3740 }
3741
3742 void
3743 focus(XEvent *ev) {
3744 XFocusChangeEvent *e = &ev->xfocus;
3745
3746 if(e->mode == NotifyGrab)
3747 return;
3748
3749 if(ev->type == FocusIn) {
3750 XSetICFocus(xw.xic);
3751 xw.state |= WIN_FOCUSED;
3752 xseturgency(0);
3753 if(IS_SET(MODE_FOCUS))
3754 ttywrite("\033[I", 3);
3755 } else {
3756 XUnsetICFocus(xw.xic);
3757 xw.state &= ~WIN_FOCUSED;
3758 if(IS_SET(MODE_FOCUS))
3759 ttywrite("\033[O", 3);
3760 }
3761 }
3762
3763 static inline bool
3764 match(uint mask, uint state) {
3765 return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
3766 }
3767
3768 void
3769 numlock(const Arg *dummy) {
3770 term.numlock ^= 1;
3771 }
3772
3773 char*
3774 kmap(KeySym k, uint state) {
3775 Key *kp;
3776 int i;
3777
3778 /* Check for mapped keys out of X11 function keys. */
3779 for(i = 0; i < LEN(mappedkeys); i++) {
3780 if(mappedkeys[i] == k)
3781 break;
3782 }
3783 if(i == LEN(mappedkeys)) {
3784 if((k & 0xFFFF) < 0xFD00)
3785 return NULL;
3786 }
3787
3788 for(kp = key; kp < key + LEN(key); kp++) {
3789 if(kp->k != k)
3790 continue;
3791
3792 if(!match(kp->mask, state))
3793 continue;
3794
3795 if(IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
3796 continue;
3797 if(term.numlock && kp->appkey == 2)
3798 continue;
3799
3800 if(IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
3801 continue;
3802
3803 if(IS_SET(MODE_CRLF) ? kp->crlf < 0 : kp->crlf > 0)
3804 continue;
3805
3806 return kp->s;
3807 }
3808
3809 return NULL;
3810 }
3811
3812 void
3813 kpress(XEvent *ev) {
3814 XKeyEvent *e = &ev->xkey;
3815 KeySym ksym;
3816 char buf[32], *customkey;
3817 int len;
3818 long c;
3819 Status status;
3820 Shortcut *bp;
3821
3822 if(IS_SET(MODE_KBDLOCK))
3823 return;
3824
3825 len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
3826 /* 1. shortcuts */
3827 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3828 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3829 bp->func(&(bp->arg));
3830 return;
3831 }
3832 }
3833
3834 /* 2. custom keys from config.h */
3835 if((customkey = kmap(ksym, e->state))) {
3836 ttysend(customkey, strlen(customkey));
3837 return;
3838 }
3839
3840 /* 3. composed string from input method */
3841 if(len == 0)
3842 return;
3843 if(len == 1 && e->state & Mod1Mask) {
3844 if(IS_SET(MODE_8BIT)) {
3845 if(*buf < 0177) {
3846 c = *buf | 0x80;
3847 len = utf8encode(c, buf, UTF_SIZ);
3848 }
3849 } else {
3850 buf[1] = buf[0];
3851 buf[0] = '\033';
3852 len = 2;
3853 }
3854 }
3855 ttysend(buf, len);
3856 }
3857
3858
3859 void
3860 cmessage(XEvent *e) {
3861 /*
3862 * See xembed specs
3863 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3864 */
3865 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3866 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3867 xw.state |= WIN_FOCUSED;
3868 xseturgency(0);
3869 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3870 xw.state &= ~WIN_FOCUSED;
3871 }
3872 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3873 /* Send SIGHUP to shell */
3874 kill(pid, SIGHUP);
3875 exit(EXIT_SUCCESS);
3876 }
3877 }
3878
3879 void
3880 cresize(int width, int height) {
3881 int col, row;
3882
3883 if(width != 0)
3884 xw.w = width;
3885 if(height != 0)
3886 xw.h = height;
3887
3888 col = (xw.w - 2 * borderpx) / xw.cw;
3889 row = (xw.h - 2 * borderpx) / xw.ch;
3890
3891 tresize(col, row);
3892 xresize(col, row);
3893 ttyresize();
3894 }
3895
3896 void
3897 resize(XEvent *e) {
3898 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3899 return;
3900
3901 cresize(e->xconfigure.width, e->xconfigure.height);
3902 }
3903
3904 void
3905 run(void) {
3906 XEvent ev;
3907 int w = xw.w, h = xw.h;
3908 fd_set rfd;
3909 int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3910 struct timespec drawtimeout, *tv = NULL, now, last, lastblink;
3911 long deltatime;
3912
3913 /* Waiting for window mapping */
3914 while(1) {
3915 XNextEvent(xw.dpy, &ev);
3916 if(XFilterEvent(&ev, None))
3917 continue;
3918 if(ev.type == ConfigureNotify) {
3919 w = ev.xconfigure.width;
3920 h = ev.xconfigure.height;
3921 } else if(ev.type == MapNotify) {
3922 break;
3923 }
3924 }
3925
3926 ttynew();
3927 cresize(w, h);
3928
3929 clock_gettime(CLOCK_MONOTONIC, &last);
3930 lastblink = last;
3931
3932 for(xev = actionfps;;) {
3933 FD_ZERO(&rfd);
3934 FD_SET(cmdfd, &rfd);
3935 FD_SET(xfd, &rfd);
3936
3937 if(pselect(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv, NULL) < 0) {
3938 if(errno == EINTR)
3939 continue;
3940 die("select failed: %s\n", strerror(errno));
3941 }
3942 if(FD_ISSET(cmdfd, &rfd)) {
3943 ttyread();
3944 if(blinktimeout) {
3945 blinkset = tattrset(ATTR_BLINK);
3946 if(!blinkset)
3947 MODBIT(term.mode, 0, MODE_BLINK);
3948 }
3949 }
3950
3951 if(FD_ISSET(xfd, &rfd))
3952 xev = actionfps;
3953
3954 clock_gettime(CLOCK_MONOTONIC, &now);
3955 drawtimeout.tv_sec = 0;
3956 drawtimeout.tv_nsec = (1000/xfps) * 1E6;
3957 tv = &drawtimeout;
3958
3959 dodraw = 0;
3960 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
3961 tsetdirtattr(ATTR_BLINK);
3962 term.mode ^= MODE_BLINK;
3963 lastblink = now;
3964 dodraw = 1;
3965 }
3966 deltatime = TIMEDIFF(now, last);
3967 if(deltatime > (xev? (1000/xfps) : (1000/actionfps))
3968 || deltatime < 0) {
3969 dodraw = 1;
3970 last = now;
3971 }
3972
3973 if(dodraw) {
3974 while(XPending(xw.dpy)) {
3975 XNextEvent(xw.dpy, &ev);
3976 if(XFilterEvent(&ev, None))
3977 continue;
3978 if(handler[ev.type])
3979 (handler[ev.type])(&ev);
3980 }
3981
3982 draw();
3983 XFlush(xw.dpy);
3984
3985 if(xev && !FD_ISSET(xfd, &rfd))
3986 xev--;
3987 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
3988 if(blinkset) {
3989 if(TIMEDIFF(now, lastblink) \
3990 > blinktimeout) {
3991 drawtimeout.tv_nsec = 1000;
3992 } else {
3993 drawtimeout.tv_nsec = (1E6 * \
3994 (blinktimeout - \
3995 TIMEDIFF(now,
3996 lastblink)));
3997 }
3998 drawtimeout.tv_sec = \
3999 drawtimeout.tv_nsec / 1E9;
4000 drawtimeout.tv_nsec %= (long)1E9;
4001 } else {
4002 tv = NULL;
4003 }
4004 }
4005 }
4006 }
4007 }
4008
4009 void
4010 usage(void) {
4011 die("%s " VERSION " (c) 2010-2015 st engineers\n" \
4012 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]\n"
4013 " [-i] [-t title] [-w windowid] [-e command ...]\n", argv0);
4014 }
4015
4016 int
4017 main(int argc, char *argv[]) {
4018 char *titles;
4019 uint cols = 80, rows = 24;
4020
4021 xw.l = xw.t = 0;
4022 xw.isfixed = False;
4023 xw.cursor = 0;
4024
4025 ARGBEGIN {
4026 case 'a':
4027 allowaltscreen = false;
4028 break;
4029 case 'c':
4030 opt_class = EARGF(usage());
4031 break;
4032 case 'e':
4033 /* eat all remaining arguments */
4034 if(argc > 1) {
4035 opt_cmd = &argv[1];
4036 if(argv[1] != NULL && opt_title == NULL) {
4037 titles = xstrdup(argv[1]);
4038 opt_title = basename(titles);
4039 }
4040 }
4041 goto run;
4042 case 'f':
4043 opt_font = EARGF(usage());
4044 break;
4045 case 'g':
4046 xw.gm = XParseGeometry(EARGF(usage()),
4047 &xw.l, &xw.t, &cols, &rows);
4048 break;
4049 case 'i':
4050 xw.isfixed = True;
4051 break;
4052 case 'o':
4053 opt_io = EARGF(usage());
4054 break;
4055 case 't':
4056 opt_title = EARGF(usage());
4057 break;
4058 case 'w':
4059 opt_embed = EARGF(usage());
4060 break;
4061 case 'v':
4062 default:
4063 usage();
4064 } ARGEND;
4065
4066 run:
4067 setlocale(LC_CTYPE, "");
4068 XSetLocaleModifiers("");
4069 tnew(cols? cols : 1, rows? rows : 1);
4070 xinit();
4071 selinit();
4072 run();
4073
4074 return 0;
4075 }
4076