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[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);
363 static void strdump(void);
364 static void strhandle(void);
365 static void strparse(void);
366 static void strreset(void);
367
368 static int tattrset(int);
369 static void tprinter(char *, size_t);
370 static void tdumpsel(void);
371 static void tdumpline(int);
372 static void tdump(void);
373 static void tclearregion(int, int, int, int);
374 static void tcursor(int);
375 static void tdeletechar(int);
376 static void tdeleteline(int);
377 static void tinsertblank(int);
378 static void tinsertblankline(int);
379 static int tlinelen(int);
380 static void tmoveto(int, int);
381 static void tmoveato(int, int);
382 static void tnew(int, int);
383 static void tnewline(int);
384 static void tputtab(int);
385 static void tputc(char *, int);
386 static void treset(void);
387 static void tresize(int, int);
388 static void tscrollup(int, int);
389 static void tscrolldown(int, int);
390 static void tsetattr(int *, int);
391 static void tsetchar(char *, Glyph *, int, int);
392 static void tsetscroll(int, int);
393 static void tswapscreen(void);
394 static void tsetdirt(int, int);
395 static void tsetdirtattr(int);
396 static void tsetmode(bool, bool, int *, int);
397 static void tfulldirt(void);
398 static void techo(char *, int);
399 static void tcontrolcode(uchar );
400 static void tdectest(char );
401 static int32_t tdefcolor(int *, int *, int);
402 static void tdeftran(char);
403 static inline bool match(uint, uint);
404 static void ttynew(void);
405 static void ttyread(void);
406 static void ttyresize(void);
407 static void ttysend(char *, size_t);
408 static void ttywrite(const char *, size_t);
409 static void tstrsequence(uchar);
410
411 static inline ushort sixd_to_16bit(int);
412 static void xdraws(char *, Glyph, int, int, int, int);
413 static void xhints(void);
414 static void xclear(int, int, int, int);
415 static void xdrawcursor(void);
416 static void xinit(void);
417 static void xloadcols(void);
418 static int xsetcolorname(int, const char *);
419 static int xgeommasktogravity(int);
420 static int xloadfont(Font *, FcPattern *);
421 static void xloadfonts(char *, double);
422 static int xloadfontset(Font *);
423 static void xsettitle(char *);
424 static void xresettitle(void);
425 static void xsetpointermotion(int);
426 static void xseturgency(int);
427 static void xsetsel(char *);
428 static void xtermclear(int, int, int, int);
429 static void xunloadfont(Font *);
430 static void xunloadfonts(void);
431 static void xresize(int, int);
432
433 static void expose(XEvent *);
434 static void visibility(XEvent *);
435 static void unmap(XEvent *);
436 static char *kmap(KeySym, uint);
437 static void kpress(XEvent *);
438 static void cmessage(XEvent *);
439 static void cresize(int, int);
440 static void resize(XEvent *);
441 static void focus(XEvent *);
442 static void brelease(XEvent *);
443 static void bpress(XEvent *);
444 static void bmotion(XEvent *);
445 static void selnotify(XEvent *);
446 static void selclear(XEvent *);
447 static void selrequest(XEvent *);
448
449 static void selinit(void);
450 static void selnormalize(void);
451 static inline bool selected(int, int);
452 static char *getsel(void);
453 static void selcopy(void);
454 static void selscroll(int, int);
455 static void selsnap(int, int *, int *, int);
456 static int x2col(int);
457 static int y2row(int);
458 static void getbuttoninfo(XEvent *);
459 static void mousereport(XEvent *);
460
461 static size_t utf8decode(char *, long *, size_t);
462 static long utf8decodebyte(char, size_t *);
463 static size_t utf8encode(long, char *, size_t);
464 static char utf8encodebyte(long, size_t);
465 static size_t utf8len(char *);
466 static size_t utf8validate(long *, size_t);
467
468 static ssize_t xwrite(int, const char *, size_t);
469 static void *xmalloc(size_t);
470 static void *xrealloc(void *, size_t);
471 static char *xstrdup(char *);
472
473 static void usage(void);
474
475 static void (*handler[LASTEvent])(XEvent *) = {
476 [KeyPress] = kpress,
477 [ClientMessage] = cmessage,
478 [ConfigureNotify] = resize,
479 [VisibilityNotify] = visibility,
480 [UnmapNotify] = unmap,
481 [Expose] = expose,
482 [FocusIn] = focus,
483 [FocusOut] = focus,
484 [MotionNotify] = bmotion,
485 [ButtonPress] = bpress,
486 [ButtonRelease] = brelease,
487 /*
488 * Uncomment if you want the selection to disappear when you select something
489 * different in another window.
490 */
491 /* [SelectionClear] = selclear, */
492 [SelectionNotify] = selnotify,
493 [SelectionRequest] = selrequest,
494 };
495
496 /* Globals */
497 static DC dc;
498 static XWindow xw;
499 static Term term;
500 static CSIEscape csiescseq;
501 static STREscape strescseq;
502 static int cmdfd;
503 static pid_t pid;
504 static Selection sel;
505 static int iofd = STDOUT_FILENO;
506 static char **opt_cmd = NULL;
507 static char *opt_io = NULL;
508 static char *opt_title = NULL;
509 static char *opt_embed = NULL;
510 static char *opt_class = NULL;
511 static char *opt_font = NULL;
512 static int oldbutton = 3; /* button event on startup: 3 = release */
513
514 static char *usedfont = NULL;
515 static double usedfontsize = 0;
516 static double defaultfontsize = 0;
517
518 static uchar utfbyte[UTF_SIZ + 1] = {0x80, 0, 0xC0, 0xE0, 0xF0};
519 static uchar utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
520 static long utfmin[UTF_SIZ + 1] = { 0, 0, 0x80, 0x800, 0x10000};
521 static long utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
522
523 /* Font Ring Cache */
524 enum {
525 FRC_NORMAL,
526 FRC_ITALIC,
527 FRC_BOLD,
528 FRC_ITALICBOLD
529 };
530
531 typedef struct {
532 XftFont *font;
533 int flags;
534 long unicodep;
535 } Fontcache;
536
537 /* Fontcache is an array now. A new font will be appended to the array. */
538 static Fontcache frc[16];
539 static int frclen = 0;
540
541 ssize_t
542 xwrite(int fd, const char *s, size_t len) {
543 size_t aux = len;
544
545 while(len > 0) {
546 ssize_t r = write(fd, s, len);
547 if(r < 0)
548 return r;
549 len -= r;
550 s += r;
551 }
552 return aux;
553 }
554
555 void *
556 xmalloc(size_t len) {
557 void *p = malloc(len);
558
559 if(!p)
560 die("Out of memory\n");
561
562 return p;
563 }
564
565 void *
566 xrealloc(void *p, size_t len) {
567 if((p = realloc(p, len)) == NULL)
568 die("Out of memory\n");
569
570 return p;
571 }
572
573 char *
574 xstrdup(char *s) {
575 if((s = strdup(s)) == NULL)
576 die("Out of memory\n");
577
578 return s;
579 }
580
581 size_t
582 utf8decode(char *c, long *u, size_t clen) {
583 size_t i, j, len, type;
584 long udecoded;
585
586 *u = UTF_INVALID;
587 if(!clen)
588 return 0;
589 udecoded = utf8decodebyte(c[0], &len);
590 if(!BETWEEN(len, 1, UTF_SIZ))
591 return 1;
592 for(i = 1, j = 1; i < clen && j < len; ++i, ++j) {
593 udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
594 if(type != 0)
595 return j;
596 }
597 if(j < len)
598 return 0;
599 *u = udecoded;
600 utf8validate(u, len);
601 return len;
602 }
603
604 long
605 utf8decodebyte(char c, size_t *i) {
606 for(*i = 0; *i < LEN(utfmask); ++(*i))
607 if(((uchar)c & utfmask[*i]) == utfbyte[*i])
608 return (uchar)c & ~utfmask[*i];
609 return 0;
610 }
611
612 size_t
613 utf8encode(long u, char *c, size_t clen) {
614 size_t len, i;
615
616 len = utf8validate(&u, 0);
617 if(clen < len)
618 return 0;
619 for(i = len - 1; i != 0; --i) {
620 c[i] = utf8encodebyte(u, 0);
621 u >>= 6;
622 }
623 c[0] = utf8encodebyte(u, len);
624 return len;
625 }
626
627 char
628 utf8encodebyte(long u, size_t i) {
629 return utfbyte[i] | (u & ~utfmask[i]);
630 }
631
632 size_t
633 utf8len(char *c) {
634 return utf8decode(c, &(long){0}, UTF_SIZ);
635 }
636
637 size_t
638 utf8validate(long *u, size_t i) {
639 if(!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF))
640 *u = UTF_INVALID;
641 for(i = 1; *u > utfmax[i]; ++i)
642 ;
643 return i;
644 }
645
646 void
647 selinit(void) {
648 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
649 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
650 sel.mode = 0;
651 sel.ob.x = -1;
652 sel.primary = NULL;
653 sel.clipboard = NULL;
654 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
655 if(sel.xtarget == None)
656 sel.xtarget = XA_STRING;
657 }
658
659 int
660 x2col(int x) {
661 x -= borderpx;
662 x /= xw.cw;
663
664 return LIMIT(x, 0, term.col-1);
665 }
666
667 int
668 y2row(int y) {
669 y -= borderpx;
670 y /= xw.ch;
671
672 return LIMIT(y, 0, term.row-1);
673 }
674
675 int tlinelen(int y) {
676 int i = term.col;
677
678 if(term.line[y][i - 1].mode & ATTR_WRAP)
679 return i;
680
681 while(i > 0 && term.line[y][i - 1].c[0] == ' ')
682 --i;
683
684 return i;
685 }
686
687 void
688 selnormalize(void) {
689 int i;
690
691 if(sel.ob.y == sel.oe.y || sel.type == SEL_RECTANGULAR) {
692 sel.nb.x = MIN(sel.ob.x, sel.oe.x);
693 sel.ne.x = MAX(sel.ob.x, sel.oe.x);
694 } else {
695 sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
696 sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
697 }
698 sel.nb.y = MIN(sel.ob.y, sel.oe.y);
699 sel.ne.y = MAX(sel.ob.y, sel.oe.y);
700
701 selsnap(sel.snap, &sel.nb.x, &sel.nb.y, -1);
702 selsnap(sel.snap, &sel.ne.x, &sel.ne.y, +1);
703
704 /* expand selection over line breaks */
705 if (sel.type == SEL_RECTANGULAR)
706 return;
707 i = tlinelen(sel.nb.y);
708 if (i < sel.nb.x)
709 sel.nb.x = i;
710 if (tlinelen(sel.ne.y) <= sel.ne.x)
711 sel.ne.x = term.col - 1;
712 }
713
714 bool
715 selected(int x, int y) {
716 if(sel.type == SEL_RECTANGULAR)
717 return BETWEEN(y, sel.nb.y, sel.ne.y)
718 && BETWEEN(x, sel.nb.x, sel.ne.x);
719
720 return BETWEEN(y, sel.nb.y, sel.ne.y)
721 && (y != sel.nb.y || x >= sel.nb.x)
722 && (y != sel.ne.y || x <= sel.ne.x);
723 }
724
725 void
726 selsnap(int mode, int *x, int *y, int direction) {
727 int newx, newy, xt, yt;
728 bool delim, prevdelim;
729 Glyph *gp, *prevgp;
730
731 switch(mode) {
732 case SNAP_WORD:
733 /*
734 * Snap around if the word wraps around at the end or
735 * beginning of a line.
736 */
737 prevgp = &term.line[*y][*x];
738 prevdelim = strchr(worddelimiters, prevgp->c[0]) != NULL;
739 for(;;) {
740 newx = *x + direction;
741 newy = *y;
742 if(!BETWEEN(newx, 0, term.col - 1)) {
743 newy += direction;
744 newx = (newx + term.col) % term.col;
745 if (!BETWEEN(newy, 0, term.row - 1))
746 break;
747
748 if(direction > 0)
749 yt = *y, xt = *x;
750 else
751 yt = newy, xt = newx;
752 if(!(term.line[yt][xt].mode & ATTR_WRAP))
753 break;
754 }
755
756 if (newx >= tlinelen(newy))
757 break;
758
759 gp = &term.line[newy][newx];
760 delim = strchr(worddelimiters, gp->c[0]) != NULL;
761 if(!(gp->mode & ATTR_WDUMMY) && (delim != prevdelim
762 || (delim && gp->c[0] != prevgp->c[0])))
763 break;
764
765 *x = newx;
766 *y = newy;
767 prevgp = gp;
768 prevdelim = delim;
769 }
770 break;
771 case SNAP_LINE:
772 /*
773 * Snap around if the the previous line or the current one
774 * has set ATTR_WRAP at its end. Then the whole next or
775 * previous line will be selected.
776 */
777 *x = (direction < 0) ? 0 : term.col - 1;
778 if(direction < 0 && *y > 0) {
779 for(; *y > 0; *y += direction) {
780 if(!(term.line[*y-1][term.col-1].mode
781 & ATTR_WRAP)) {
782 break;
783 }
784 }
785 } else if(direction > 0 && *y < term.row-1) {
786 for(; *y < term.row; *y += direction) {
787 if(!(term.line[*y][term.col-1].mode
788 & ATTR_WRAP)) {
789 break;
790 }
791 }
792 }
793 break;
794 }
795 }
796
797 void
798 getbuttoninfo(XEvent *e) {
799 int type;
800 uint state = e->xbutton.state & ~(Button1Mask | forceselmod);
801
802 sel.alt = IS_SET(MODE_ALTSCREEN);
803
804 sel.oe.x = x2col(e->xbutton.x);
805 sel.oe.y = y2row(e->xbutton.y);
806 selnormalize();
807
808 sel.type = SEL_REGULAR;
809 for(type = 1; type < LEN(selmasks); ++type) {
810 if(match(selmasks[type], state)) {
811 sel.type = type;
812 break;
813 }
814 }
815 }
816
817 void
818 mousereport(XEvent *e) {
819 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
820 button = e->xbutton.button, state = e->xbutton.state,
821 len;
822 char buf[40];
823 static int ox, oy;
824
825 /* from urxvt */
826 if(e->xbutton.type == MotionNotify) {
827 if(x == ox && y == oy)
828 return;
829 if(!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
830 return;
831 /* MOUSE_MOTION: no reporting if no button is pressed */
832 if(IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
833 return;
834
835 button = oldbutton + 32;
836 ox = x;
837 oy = y;
838 } else {
839 if(!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
840 button = 3;
841 } else {
842 button -= Button1;
843 if(button >= 3)
844 button += 64 - 3;
845 }
846 if(e->xbutton.type == ButtonPress) {
847 oldbutton = button;
848 ox = x;
849 oy = y;
850 } else if(e->xbutton.type == ButtonRelease) {
851 oldbutton = 3;
852 /* MODE_MOUSEX10: no button release reporting */
853 if(IS_SET(MODE_MOUSEX10))
854 return;
855 if (button == 64 || button == 65)
856 return;
857 }
858 }
859
860 if(!IS_SET(MODE_MOUSEX10)) {
861 button += (state & ShiftMask ? 4 : 0)
862 + (state & Mod4Mask ? 8 : 0)
863 + (state & ControlMask ? 16 : 0);
864 }
865
866 len = 0;
867 if(IS_SET(MODE_MOUSESGR)) {
868 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
869 button, x+1, y+1,
870 e->xbutton.type == ButtonRelease ? 'm' : 'M');
871 } else if(x < 223 && y < 223) {
872 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
873 32+button, 32+x+1, 32+y+1);
874 } else {
875 return;
876 }
877
878 ttywrite(buf, len);
879 }
880
881 void
882 bpress(XEvent *e) {
883 struct timespec now;
884 Mousekey *mk;
885
886 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
887 mousereport(e);
888 return;
889 }
890
891 for(mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
892 if(e->xbutton.button == mk->b
893 && match(mk->mask, e->xbutton.state)) {
894 ttysend(mk->s, strlen(mk->s));
895 return;
896 }
897 }
898
899 if(e->xbutton.button == Button1) {
900 clock_gettime(CLOCK_MONOTONIC, &now);
901
902 /* Clear previous selection, logically and visually. */
903 selclear(NULL);
904 sel.mode = 1;
905 sel.type = SEL_REGULAR;
906 sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
907 sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
908
909 /*
910 * If the user clicks below predefined timeouts specific
911 * snapping behaviour is exposed.
912 */
913 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
914 sel.snap = SNAP_LINE;
915 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
916 sel.snap = SNAP_WORD;
917 } else {
918 sel.snap = 0;
919 }
920 selnormalize();
921
922 /*
923 * Draw selection, unless it's regular and we don't want to
924 * make clicks visible
925 */
926 if(sel.snap != 0) {
927 sel.mode++;
928 tsetdirt(sel.nb.y, sel.ne.y);
929 }
930 sel.tclick2 = sel.tclick1;
931 sel.tclick1 = now;
932 }
933 }
934
935 char *
936 getsel(void) {
937 char *str, *ptr;
938 int y, bufsize, size, lastx, linelen;
939 Glyph *gp, *last;
940
941 if(sel.ob.x == -1)
942 return NULL;
943
944 bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
945 ptr = str = xmalloc(bufsize);
946
947 /* append every set & selected glyph to the selection */
948 for(y = sel.nb.y; y < sel.ne.y + 1; y++) {
949 linelen = tlinelen(y);
950
951 if(sel.type == SEL_RECTANGULAR) {
952 gp = &term.line[y][sel.nb.x];
953 lastx = sel.ne.x;
954 } else {
955 gp = &term.line[y][sel.nb.y == y ? sel.nb.x : 0];
956 lastx = (sel.ne.y == y) ? sel.ne.x : term.col-1;
957 }
958 last = &term.line[y][MIN(lastx, linelen-1)];
959 while(last >= gp && last->c[0] == ' ')
960 --last;
961
962 for( ; gp <= last; ++gp) {
963 if(gp->mode & ATTR_WDUMMY)
964 continue;
965
966 size = utf8len(gp->c);
967 memcpy(ptr, gp->c, size);
968 ptr += size;
969 }
970
971 /*
972 * Copy and pasting of line endings is inconsistent
973 * in the inconsistent terminal and GUI world.
974 * The best solution seems like to produce '\n' when
975 * something is copied from st and convert '\n' to
976 * '\r', when something to be pasted is received by
977 * st.
978 * FIXME: Fix the computer world.
979 */
980 if((y < sel.ne.y || lastx >= linelen) && !(last->mode & ATTR_WRAP))
981 *ptr++ = '\n';
982 }
983 *ptr = 0;
984 return str;
985 }
986
987 void
988 selcopy(void) {
989 xsetsel(getsel());
990 }
991
992 void
993 selnotify(XEvent *e) {
994 ulong nitems, ofs, rem;
995 int format;
996 uchar *data, *last, *repl;
997 Atom type;
998 XSelectionEvent *xsev;
999
1000 ofs = 0;
1001 xsev = (XSelectionEvent *)e;
1002 if (xsev->property == None)
1003 return;
1004 do {
1005 if(XGetWindowProperty(xw.dpy, xw.win, xsev->property, ofs,
1006 BUFSIZ/4, False, AnyPropertyType,
1007 &type, &format, &nitems, &rem,
1008 &data)) {
1009 fprintf(stderr, "Clipboard allocation failed\n");
1010 return;
1011 }
1012
1013 /*
1014 * As seen in getsel:
1015 * Line endings are inconsistent in the terminal and GUI world
1016 * copy and pasting. When receiving some selection data,
1017 * replace all '\n' with '\r'.
1018 * FIXME: Fix the computer world.
1019 */
1020 repl = data;
1021 last = data + nitems * format / 8;
1022 while((repl = memchr(repl, '\n', last - repl))) {
1023 *repl++ = '\r';
1024 }
1025
1026 if(IS_SET(MODE_BRCKTPASTE))
1027 ttywrite("\033[200~", 6);
1028 ttysend((char *)data, nitems * format / 8);
1029 if(IS_SET(MODE_BRCKTPASTE))
1030 ttywrite("\033[201~", 6);
1031 XFree(data);
1032 /* number of 32-bit chunks returned */
1033 ofs += nitems * format / 32;
1034 } while(rem > 0);
1035 }
1036
1037 void
1038 selpaste(const Arg *dummy) {
1039 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
1040 xw.win, CurrentTime);
1041 }
1042
1043 void
1044 clipcopy(const Arg *dummy) {
1045 Atom clipboard;
1046
1047 if(sel.clipboard != NULL)
1048 free(sel.clipboard);
1049
1050 if(sel.primary != NULL) {
1051 sel.clipboard = xstrdup(sel.primary);
1052 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1053 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
1054 }
1055 }
1056
1057 void
1058 clippaste(const Arg *dummy) {
1059 Atom clipboard;
1060
1061 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1062 XConvertSelection(xw.dpy, clipboard, sel.xtarget, clipboard,
1063 xw.win, CurrentTime);
1064 }
1065
1066 void
1067 selclear(XEvent *e) {
1068 if(sel.ob.x == -1)
1069 return;
1070 sel.ob.x = -1;
1071 tsetdirt(sel.nb.y, sel.ne.y);
1072 }
1073
1074 void
1075 selrequest(XEvent *e) {
1076 XSelectionRequestEvent *xsre;
1077 XSelectionEvent xev;
1078 Atom xa_targets, string, clipboard;
1079 char *seltext;
1080
1081 xsre = (XSelectionRequestEvent *) e;
1082 xev.type = SelectionNotify;
1083 xev.requestor = xsre->requestor;
1084 xev.selection = xsre->selection;
1085 xev.target = xsre->target;
1086 xev.time = xsre->time;
1087 /* reject */
1088 xev.property = None;
1089
1090 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
1091 if(xsre->target == xa_targets) {
1092 /* respond with the supported type */
1093 string = sel.xtarget;
1094 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1095 XA_ATOM, 32, PropModeReplace,
1096 (uchar *) &string, 1);
1097 xev.property = xsre->property;
1098 } else if(xsre->target == sel.xtarget || xsre->target == XA_STRING) {
1099 /*
1100 * xith XA_STRING non ascii characters may be incorrect in the
1101 * requestor. It is not our problem, use utf8.
1102 */
1103 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1104 if(xsre->selection == XA_PRIMARY) {
1105 seltext = sel.primary;
1106 } else if(xsre->selection == clipboard) {
1107 seltext = sel.clipboard;
1108 } else {
1109 fprintf(stderr,
1110 "Unhandled clipboard selection 0x%lx\n",
1111 xsre->selection);
1112 return;
1113 }
1114 if(seltext != NULL) {
1115 XChangeProperty(xsre->display, xsre->requestor,
1116 xsre->property, xsre->target,
1117 8, PropModeReplace,
1118 (uchar *)seltext, strlen(seltext));
1119 xev.property = xsre->property;
1120 }
1121 }
1122
1123 /* all done, send a notification to the listener */
1124 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
1125 fprintf(stderr, "Error sending SelectionNotify event\n");
1126 }
1127
1128 void
1129 xsetsel(char *str) {
1130 free(sel.primary);
1131 sel.primary = str;
1132
1133 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
1134 }
1135
1136 void
1137 brelease(XEvent *e) {
1138 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1139 mousereport(e);
1140 return;
1141 }
1142
1143 if(e->xbutton.button == Button2) {
1144 selpaste(NULL);
1145 } else if(e->xbutton.button == Button1) {
1146 if(sel.mode < 2) {
1147 selclear(NULL);
1148 } else {
1149 getbuttoninfo(e);
1150 selcopy();
1151 }
1152 sel.mode = 0;
1153 tsetdirt(sel.nb.y, sel.ne.y);
1154 }
1155 }
1156
1157 void
1158 bmotion(XEvent *e) {
1159 int oldey, oldex, oldsby, oldsey;
1160
1161 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1162 mousereport(e);
1163 return;
1164 }
1165
1166 if(!sel.mode)
1167 return;
1168
1169 sel.mode++;
1170 oldey = sel.oe.y;
1171 oldex = sel.oe.x;
1172 oldsby = sel.nb.y;
1173 oldsey = sel.ne.y;
1174 getbuttoninfo(e);
1175
1176 if(oldey != sel.oe.y || oldex != sel.oe.x)
1177 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
1178 }
1179
1180 void
1181 die(const char *errstr, ...) {
1182 va_list ap;
1183
1184 va_start(ap, errstr);
1185 vfprintf(stderr, errstr, ap);
1186 va_end(ap);
1187 exit(EXIT_FAILURE);
1188 }
1189
1190 void
1191 execsh(void) {
1192 char **args, *sh, *prog;
1193 const struct passwd *pw;
1194 char buf[sizeof(long) * 8 + 1];
1195
1196 errno = 0;
1197 if((pw = getpwuid(getuid())) == NULL) {
1198 if(errno)
1199 die("getpwuid:%s\n", strerror(errno));
1200 else
1201 die("who are you?\n");
1202 }
1203
1204 if (!(sh = getenv("SHELL"))) {
1205 sh = (pw->pw_shell[0]) ? pw->pw_shell : shell;
1206 }
1207
1208 if(opt_cmd)
1209 prog = opt_cmd[0];
1210 else if(utmp)
1211 prog = utmp;
1212 else
1213 prog = sh;
1214 args = (opt_cmd) ? opt_cmd : (char *[]) {prog, NULL};
1215
1216 snprintf(buf, sizeof(buf), "%lu", xw.win);
1217
1218 unsetenv("COLUMNS");
1219 unsetenv("LINES");
1220 unsetenv("TERMCAP");
1221 setenv("LOGNAME", pw->pw_name, 1);
1222 setenv("USER", pw->pw_name, 1);
1223 setenv("SHELL", sh, 1);
1224 setenv("HOME", pw->pw_dir, 1);
1225 setenv("TERM", termname, 1);
1226 setenv("WINDOWID", buf, 1);
1227
1228 signal(SIGCHLD, SIG_DFL);
1229 signal(SIGHUP, SIG_DFL);
1230 signal(SIGINT, SIG_DFL);
1231 signal(SIGQUIT, SIG_DFL);
1232 signal(SIGTERM, SIG_DFL);
1233 signal(SIGALRM, SIG_DFL);
1234
1235 execvp(prog, args);
1236 _exit(EXIT_FAILURE);
1237 }
1238
1239 void
1240 sigchld(int a) {
1241 int stat, ret;
1242
1243 if(waitpid(pid, &stat, 0) < 0)
1244 die("Waiting for pid %hd failed: %s\n", pid, strerror(errno));
1245
1246 ret = WIFEXITED(stat) ? WEXITSTATUS(stat) : EXIT_FAILURE;
1247 if (ret != EXIT_SUCCESS)
1248 die("child finished with error '%d'\n", stat);
1249 exit(EXIT_SUCCESS);
1250 }
1251
1252 void
1253 ttynew(void) {
1254 int m, s;
1255 struct winsize w = {term.row, term.col, 0, 0};
1256
1257 /* seems to work fine on linux, openbsd and freebsd */
1258 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1259 die("openpty failed: %s\n", strerror(errno));
1260
1261 switch(pid = fork()) {
1262 case -1:
1263 die("fork failed\n");
1264 break;
1265 case 0:
1266 setsid(); /* create a new process group */
1267 dup2(s, STDIN_FILENO);
1268 dup2(s, STDOUT_FILENO);
1269 dup2(s, STDERR_FILENO);
1270 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1271 die("ioctl TIOCSCTTY failed: %s\n", strerror(errno));
1272 close(s);
1273 close(m);
1274 execsh();
1275 break;
1276 default:
1277 close(s);
1278 cmdfd = m;
1279 signal(SIGCHLD, sigchld);
1280 if(opt_io) {
1281 term.mode |= MODE_PRINT;
1282 iofd = (!strcmp(opt_io, "-")) ?
1283 STDOUT_FILENO :
1284 open(opt_io, O_WRONLY | O_CREAT, 0666);
1285 if(iofd < 0) {
1286 fprintf(stderr, "Error opening %s:%s\n",
1287 opt_io, strerror(errno));
1288 }
1289 }
1290 break;
1291 }
1292 }
1293
1294 void
1295 ttyread(void) {
1296 static char buf[BUFSIZ];
1297 static int buflen = 0;
1298 char *ptr;
1299 char s[UTF_SIZ];
1300 int charsize; /* size of utf8 char in bytes */
1301 long unicodep;
1302 int ret;
1303
1304 /* append read bytes to unprocessed bytes */
1305 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1306 die("Couldn't read from shell: %s\n", strerror(errno));
1307
1308 /* process every complete utf8 char */
1309 buflen += ret;
1310 ptr = buf;
1311 while((charsize = utf8decode(ptr, &unicodep, buflen))) {
1312 utf8encode(unicodep, s, UTF_SIZ);
1313 tputc(s, charsize);
1314 ptr += charsize;
1315 buflen -= charsize;
1316 }
1317
1318 /* keep any uncomplete utf8 char for the next call */
1319 memmove(buf, ptr, buflen);
1320 }
1321
1322 void
1323 ttywrite(const char *s, size_t n) {
1324 if(xwrite(cmdfd, s, n) == -1)
1325 die("write error on tty: %s\n", strerror(errno));
1326 }
1327
1328 void
1329 ttysend(char *s, size_t n) {
1330 ttywrite(s, n);
1331 if(IS_SET(MODE_ECHO))
1332 techo(s, n);
1333 }
1334
1335 void
1336 ttyresize(void) {
1337 struct winsize w;
1338
1339 w.ws_row = term.row;
1340 w.ws_col = term.col;
1341 w.ws_xpixel = xw.tw;
1342 w.ws_ypixel = xw.th;
1343 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1344 fprintf(stderr, "Couldn't set window size: %s\n", strerror(errno));
1345 }
1346
1347 int
1348 tattrset(int attr) {
1349 int i, j;
1350
1351 for(i = 0; i < term.row-1; i++) {
1352 for(j = 0; j < term.col-1; j++) {
1353 if(term.line[i][j].mode & attr)
1354 return 1;
1355 }
1356 }
1357
1358 return 0;
1359 }
1360
1361 void
1362 tsetdirt(int top, int bot) {
1363 int i;
1364
1365 LIMIT(top, 0, term.row-1);
1366 LIMIT(bot, 0, term.row-1);
1367
1368 for(i = top; i <= bot; i++)
1369 term.dirty[i] = 1;
1370 }
1371
1372 void
1373 tsetdirtattr(int attr) {
1374 int i, j;
1375
1376 for(i = 0; i < term.row-1; i++) {
1377 for(j = 0; j < term.col-1; j++) {
1378 if(term.line[i][j].mode & attr) {
1379 tsetdirt(i, i);
1380 break;
1381 }
1382 }
1383 }
1384 }
1385
1386 void
1387 tfulldirt(void) {
1388 tsetdirt(0, term.row-1);
1389 }
1390
1391 void
1392 tcursor(int mode) {
1393 static TCursor c[2];
1394 bool alt = IS_SET(MODE_ALTSCREEN);
1395
1396 if(mode == CURSOR_SAVE) {
1397 c[alt] = term.c;
1398 } else if(mode == CURSOR_LOAD) {
1399 term.c = c[alt];
1400 tmoveto(c[alt].x, c[alt].y);
1401 }
1402 }
1403
1404 void
1405 treset(void) {
1406 uint i;
1407
1408 term.c = (TCursor){{
1409 .mode = ATTR_NULL,
1410 .fg = defaultfg,
1411 .bg = defaultbg
1412 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1413
1414 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1415 for(i = tabspaces; i < term.col; i += tabspaces)
1416 term.tabs[i] = 1;
1417 term.top = 0;
1418 term.bot = term.row - 1;
1419 term.mode = MODE_WRAP;
1420 memset(term.trantbl, sizeof(term.trantbl), CS_USA);
1421 term.charset = 0;
1422
1423 for(i = 0; i < 2; i++) {
1424 tmoveto(0, 0);
1425 tcursor(CURSOR_SAVE);
1426 tclearregion(0, 0, term.col-1, term.row-1);
1427 tswapscreen();
1428 }
1429 }
1430
1431 void
1432 tnew(int col, int row) {
1433 term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } };
1434 tresize(col, row);
1435 term.numlock = 1;
1436
1437 treset();
1438 }
1439
1440 void
1441 tswapscreen(void) {
1442 Line *tmp = term.line;
1443
1444 term.line = term.alt;
1445 term.alt = tmp;
1446 term.mode ^= MODE_ALTSCREEN;
1447 tfulldirt();
1448 }
1449
1450 void
1451 tscrolldown(int orig, int n) {
1452 int i;
1453 Line temp;
1454
1455 LIMIT(n, 0, term.bot-orig+1);
1456
1457 tsetdirt(orig, term.bot-n);
1458 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1459
1460 for(i = term.bot; i >= orig+n; i--) {
1461 temp = term.line[i];
1462 term.line[i] = term.line[i-n];
1463 term.line[i-n] = temp;
1464 }
1465
1466 selscroll(orig, n);
1467 }
1468
1469 void
1470 tscrollup(int orig, int n) {
1471 int i;
1472 Line temp;
1473
1474 LIMIT(n, 0, term.bot-orig+1);
1475
1476 tclearregion(0, orig, term.col-1, orig+n-1);
1477 tsetdirt(orig+n, term.bot);
1478
1479 for(i = orig; i <= term.bot-n; i++) {
1480 temp = term.line[i];
1481 term.line[i] = term.line[i+n];
1482 term.line[i+n] = temp;
1483 }
1484
1485 selscroll(orig, -n);
1486 }
1487
1488 void
1489 selscroll(int orig, int n) {
1490 if(sel.ob.x == -1)
1491 return;
1492
1493 if(BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
1494 if((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
1495 selclear(NULL);
1496 return;
1497 }
1498 if(sel.type == SEL_RECTANGULAR) {
1499 if(sel.ob.y < term.top)
1500 sel.ob.y = term.top;
1501 if(sel.oe.y > term.bot)
1502 sel.oe.y = term.bot;
1503 } else {
1504 if(sel.ob.y < term.top) {
1505 sel.ob.y = term.top;
1506 sel.ob.x = 0;
1507 }
1508 if(sel.oe.y > term.bot) {
1509 sel.oe.y = term.bot;
1510 sel.oe.x = term.col;
1511 }
1512 }
1513 selnormalize();
1514 }
1515 }
1516
1517 void
1518 tnewline(int first_col) {
1519 int y = term.c.y;
1520
1521 if(y == term.bot) {
1522 tscrollup(term.top, 1);
1523 } else {
1524 y++;
1525 }
1526 tmoveto(first_col ? 0 : term.c.x, y);
1527 }
1528
1529 void
1530 csiparse(void) {
1531 char *p = csiescseq.buf, *np;
1532 long int v;
1533
1534 csiescseq.narg = 0;
1535 if(*p == '?') {
1536 csiescseq.priv = 1;
1537 p++;
1538 }
1539
1540 csiescseq.buf[csiescseq.len] = '\0';
1541 while(p < csiescseq.buf+csiescseq.len) {
1542 np = NULL;
1543 v = strtol(p, &np, 10);
1544 if(np == p)
1545 v = 0;
1546 if(v == LONG_MAX || v == LONG_MIN)
1547 v = -1;
1548 csiescseq.arg[csiescseq.narg++] = v;
1549 p = np;
1550 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1551 break;
1552 p++;
1553 }
1554 csiescseq.mode[0] = *p++;
1555 csiescseq.mode[1] = (p < csiescseq.buf+csiescseq.len) ? *p : '\0';
1556 }
1557
1558 /* for absolute user moves, when decom is set */
1559 void
1560 tmoveato(int x, int y) {
1561 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1562 }
1563
1564 void
1565 tmoveto(int x, int y) {
1566 int miny, maxy;
1567
1568 if(term.c.state & CURSOR_ORIGIN) {
1569 miny = term.top;
1570 maxy = term.bot;
1571 } else {
1572 miny = 0;
1573 maxy = term.row - 1;
1574 }
1575 LIMIT(x, 0, term.col-1);
1576 LIMIT(y, miny, maxy);
1577 term.c.state &= ~CURSOR_WRAPNEXT;
1578 term.c.x = x;
1579 term.c.y = y;
1580 }
1581
1582 void
1583 tsetchar(char *c, Glyph *attr, int x, int y) {
1584 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1585 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1586 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1587 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1588 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1589 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1590 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1591 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1592 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1593 };
1594
1595 /*
1596 * The table is proudly stolen from rxvt.
1597 */
1598 if(term.trantbl[term.charset] == CS_GRAPHIC0) {
1599 if(BETWEEN(c[0], 0x41, 0x7e) && vt100_0[c[0] - 0x41]) {
1600 c = vt100_0[c[0] - 0x41];
1601 }
1602 }
1603
1604 if(term.line[y][x].mode & ATTR_WIDE) {
1605 if(x+1 < term.col) {
1606 term.line[y][x+1].c[0] = ' ';
1607 term.line[y][x+1].mode &= ~ATTR_WDUMMY;
1608 }
1609 } else if(term.line[y][x].mode & ATTR_WDUMMY) {
1610 term.line[y][x-1].c[0] = ' ';
1611 term.line[y][x-1].mode &= ~ATTR_WIDE;
1612 }
1613
1614 term.dirty[y] = 1;
1615 term.line[y][x] = *attr;
1616 memcpy(term.line[y][x].c, c, UTF_SIZ);
1617 }
1618
1619 void
1620 tclearregion(int x1, int y1, int x2, int y2) {
1621 int x, y, temp;
1622 Glyph *gp;
1623
1624 if(x1 > x2)
1625 temp = x1, x1 = x2, x2 = temp;
1626 if(y1 > y2)
1627 temp = y1, y1 = y2, y2 = temp;
1628
1629 LIMIT(x1, 0, term.col-1);
1630 LIMIT(x2, 0, term.col-1);
1631 LIMIT(y1, 0, term.row-1);
1632 LIMIT(y2, 0, term.row-1);
1633
1634 for(y = y1; y <= y2; y++) {
1635 term.dirty[y] = 1;
1636 for(x = x1; x <= x2; x++) {
1637 gp = &term.line[y][x];
1638 if(selected(x, y))
1639 selclear(NULL);
1640 gp->fg = term.c.attr.fg;
1641 gp->bg = term.c.attr.bg;
1642 gp->mode = 0;
1643 memcpy(gp->c, " ", 2);
1644 }
1645 }
1646 }
1647
1648 void
1649 tdeletechar(int n) {
1650 int dst, src, size;
1651 Glyph *line;
1652
1653 LIMIT(n, 0, term.col - term.c.x);
1654
1655 dst = term.c.x;
1656 src = term.c.x + n;
1657 size = term.col - src;
1658 line = term.line[term.c.y];
1659
1660 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1661 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1662 }
1663
1664 void
1665 tinsertblank(int n) {
1666 int dst, src, size;
1667 Glyph *line;
1668
1669 LIMIT(n, 0, term.col - term.c.x);
1670
1671 dst = term.c.x + n;
1672 src = term.c.x;
1673 size = term.col - dst;
1674 line = term.line[term.c.y];
1675
1676 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1677 tclearregion(src, term.c.y, dst - 1, term.c.y);
1678 }
1679
1680 void
1681 tinsertblankline(int n) {
1682 if(BETWEEN(term.c.y, term.top, term.bot))
1683 tscrolldown(term.c.y, n);
1684 }
1685
1686 void
1687 tdeleteline(int n) {
1688 if(BETWEEN(term.c.y, term.top, term.bot))
1689 tscrollup(term.c.y, n);
1690 }
1691
1692 int32_t
1693 tdefcolor(int *attr, int *npar, int l) {
1694 int32_t idx = -1;
1695 uint r, g, b;
1696
1697 switch (attr[*npar + 1]) {
1698 case 2: /* direct color in RGB space */
1699 if (*npar + 4 >= l) {
1700 fprintf(stderr,
1701 "erresc(38): Incorrect number of parameters (%d)\n",
1702 *npar);
1703 break;
1704 }
1705 r = attr[*npar + 2];
1706 g = attr[*npar + 3];
1707 b = attr[*npar + 4];
1708 *npar += 4;
1709 if(!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
1710 fprintf(stderr, "erresc: bad rgb color (%d,%d,%d)\n",
1711 r, g, b);
1712 else
1713 idx = TRUECOLOR(r, g, b);
1714 break;
1715 case 5: /* indexed color */
1716 if (*npar + 2 >= l) {
1717 fprintf(stderr,
1718 "erresc(38): Incorrect number of parameters (%d)\n",
1719 *npar);
1720 break;
1721 }
1722 *npar += 2;
1723 if(!BETWEEN(attr[*npar], 0, 255))
1724 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
1725 else
1726 idx = attr[*npar];
1727 break;
1728 case 0: /* implemented defined (only foreground) */
1729 case 1: /* transparent */
1730 case 3: /* direct color in CMY space */
1731 case 4: /* direct color in CMYK space */
1732 default:
1733 fprintf(stderr,
1734 "erresc(38): gfx attr %d unknown\n", attr[*npar]);
1735 break;
1736 }
1737
1738 return idx;
1739 }
1740
1741 void
1742 tsetattr(int *attr, int l) {
1743 int i;
1744 int32_t idx;
1745
1746 for(i = 0; i < l; i++) {
1747 switch(attr[i]) {
1748 case 0:
1749 term.c.attr.mode &= ~(
1750 ATTR_BOLD |
1751 ATTR_FAINT |
1752 ATTR_ITALIC |
1753 ATTR_UNDERLINE |
1754 ATTR_BLINK |
1755 ATTR_REVERSE |
1756 ATTR_INVISIBLE |
1757 ATTR_STRUCK );
1758 term.c.attr.fg = defaultfg;
1759 term.c.attr.bg = defaultbg;
1760 break;
1761 case 1:
1762 term.c.attr.mode |= ATTR_BOLD;
1763 break;
1764 case 2:
1765 term.c.attr.mode |= ATTR_FAINT;
1766 break;
1767 case 3:
1768 term.c.attr.mode |= ATTR_ITALIC;
1769 break;
1770 case 4:
1771 term.c.attr.mode |= ATTR_UNDERLINE;
1772 break;
1773 case 5: /* slow blink */
1774 /* FALLTHROUGH */
1775 case 6: /* rapid blink */
1776 term.c.attr.mode |= ATTR_BLINK;
1777 break;
1778 case 7:
1779 term.c.attr.mode |= ATTR_REVERSE;
1780 break;
1781 case 8:
1782 term.c.attr.mode |= ATTR_INVISIBLE;
1783 break;
1784 case 9:
1785 term.c.attr.mode |= ATTR_STRUCK;
1786 break;
1787 case 22:
1788 term.c.attr.mode &= ~(ATTR_BOLD | ATTR_FAINT);
1789 break;
1790 case 23:
1791 term.c.attr.mode &= ~ATTR_ITALIC;
1792 break;
1793 case 24:
1794 term.c.attr.mode &= ~ATTR_UNDERLINE;
1795 break;
1796 case 25:
1797 term.c.attr.mode &= ~ATTR_BLINK;
1798 break;
1799 case 27:
1800 term.c.attr.mode &= ~ATTR_REVERSE;
1801 break;
1802 case 28:
1803 term.c.attr.mode &= ~ATTR_INVISIBLE;
1804 break;
1805 case 29:
1806 term.c.attr.mode &= ~ATTR_STRUCK;
1807 break;
1808 case 38:
1809 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1810 term.c.attr.fg = idx;
1811 break;
1812 case 39:
1813 term.c.attr.fg = defaultfg;
1814 break;
1815 case 48:
1816 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1817 term.c.attr.bg = idx;
1818 break;
1819 case 49:
1820 term.c.attr.bg = defaultbg;
1821 break;
1822 default:
1823 if(BETWEEN(attr[i], 30, 37)) {
1824 term.c.attr.fg = attr[i] - 30;
1825 } else if(BETWEEN(attr[i], 40, 47)) {
1826 term.c.attr.bg = attr[i] - 40;
1827 } else if(BETWEEN(attr[i], 90, 97)) {
1828 term.c.attr.fg = attr[i] - 90 + 8;
1829 } else if(BETWEEN(attr[i], 100, 107)) {
1830 term.c.attr.bg = attr[i] - 100 + 8;
1831 } else {
1832 fprintf(stderr,
1833 "erresc(default): gfx attr %d unknown\n",
1834 attr[i]), csidump();
1835 }
1836 break;
1837 }
1838 }
1839 }
1840
1841 void
1842 tsetscroll(int t, int b) {
1843 int temp;
1844
1845 LIMIT(t, 0, term.row-1);
1846 LIMIT(b, 0, term.row-1);
1847 if(t > b) {
1848 temp = t;
1849 t = b;
1850 b = temp;
1851 }
1852 term.top = t;
1853 term.bot = b;
1854 }
1855
1856 void
1857 tsetmode(bool priv, bool set, int *args, int narg) {
1858 int *lim, mode;
1859 bool alt;
1860
1861 for(lim = args + narg; args < lim; ++args) {
1862 if(priv) {
1863 switch(*args) {
1864 case 1: /* DECCKM -- Cursor key */
1865 MODBIT(term.mode, set, MODE_APPCURSOR);
1866 break;
1867 case 5: /* DECSCNM -- Reverse video */
1868 mode = term.mode;
1869 MODBIT(term.mode, set, MODE_REVERSE);
1870 if(mode != term.mode)
1871 redraw();
1872 break;
1873 case 6: /* DECOM -- Origin */
1874 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1875 tmoveato(0, 0);
1876 break;
1877 case 7: /* DECAWM -- Auto wrap */
1878 MODBIT(term.mode, set, MODE_WRAP);
1879 break;
1880 case 0: /* Error (IGNORED) */
1881 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1882 case 3: /* DECCOLM -- Column (IGNORED) */
1883 case 4: /* DECSCLM -- Scroll (IGNORED) */
1884 case 8: /* DECARM -- Auto repeat (IGNORED) */
1885 case 18: /* DECPFF -- Printer feed (IGNORED) */
1886 case 19: /* DECPEX -- Printer extent (IGNORED) */
1887 case 42: /* DECNRCM -- National characters (IGNORED) */
1888 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1889 break;
1890 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1891 MODBIT(term.mode, !set, MODE_HIDE);
1892 break;
1893 case 9: /* X10 mouse compatibility mode */
1894 xsetpointermotion(0);
1895 MODBIT(term.mode, 0, MODE_MOUSE);
1896 MODBIT(term.mode, set, MODE_MOUSEX10);
1897 break;
1898 case 1000: /* 1000: report button press */
1899 xsetpointermotion(0);
1900 MODBIT(term.mode, 0, MODE_MOUSE);
1901 MODBIT(term.mode, set, MODE_MOUSEBTN);
1902 break;
1903 case 1002: /* 1002: report motion on button press */
1904 xsetpointermotion(0);
1905 MODBIT(term.mode, 0, MODE_MOUSE);
1906 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1907 break;
1908 case 1003: /* 1003: enable all mouse motions */
1909 xsetpointermotion(set);
1910 MODBIT(term.mode, 0, MODE_MOUSE);
1911 MODBIT(term.mode, set, MODE_MOUSEMANY);
1912 break;
1913 case 1004: /* 1004: send focus events to tty */
1914 MODBIT(term.mode, set, MODE_FOCUS);
1915 break;
1916 case 1006: /* 1006: extended reporting mode */
1917 MODBIT(term.mode, set, MODE_MOUSESGR);
1918 break;
1919 case 1034:
1920 MODBIT(term.mode, set, MODE_8BIT);
1921 break;
1922 case 1049: /* swap screen & set/restore cursor as xterm */
1923 if (!allowaltscreen)
1924 break;
1925 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1926 /* FALLTHROUGH */
1927 case 47: /* swap screen */
1928 case 1047:
1929 if (!allowaltscreen)
1930 break;
1931 alt = IS_SET(MODE_ALTSCREEN);
1932 if(alt) {
1933 tclearregion(0, 0, term.col-1,
1934 term.row-1);
1935 }
1936 if(set ^ alt) /* set is always 1 or 0 */
1937 tswapscreen();
1938 if(*args != 1049)
1939 break;
1940 /* FALLTHROUGH */
1941 case 1048:
1942 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1943 break;
1944 case 2004: /* 2004: bracketed paste mode */
1945 MODBIT(term.mode, set, MODE_BRCKTPASTE);
1946 break;
1947 /* Not implemented mouse modes. See comments there. */
1948 case 1001: /* mouse highlight mode; can hang the
1949 terminal by design when implemented. */
1950 case 1005: /* UTF-8 mouse mode; will confuse
1951 applications not supporting UTF-8
1952 and luit. */
1953 case 1015: /* urxvt mangled mouse mode; incompatible
1954 and can be mistaken for other control
1955 codes. */
1956 default:
1957 fprintf(stderr,
1958 "erresc: unknown private set/reset mode %d\n",
1959 *args);
1960 break;
1961 }
1962 } else {
1963 switch(*args) {
1964 case 0: /* Error (IGNORED) */
1965 break;
1966 case 2: /* KAM -- keyboard action */
1967 MODBIT(term.mode, set, MODE_KBDLOCK);
1968 break;
1969 case 4: /* IRM -- Insertion-replacement */
1970 MODBIT(term.mode, set, MODE_INSERT);
1971 break;
1972 case 12: /* SRM -- Send/Receive */
1973 MODBIT(term.mode, !set, MODE_ECHO);
1974 break;
1975 case 20: /* LNM -- Linefeed/new line */
1976 MODBIT(term.mode, set, MODE_CRLF);
1977 break;
1978 default:
1979 fprintf(stderr,
1980 "erresc: unknown set/reset mode %d\n",
1981 *args);
1982 break;
1983 }
1984 }
1985 }
1986 }
1987
1988 void
1989 csihandle(void) {
1990 char buf[40];
1991 int len;
1992
1993 switch(csiescseq.mode[0]) {
1994 default:
1995 unknown:
1996 fprintf(stderr, "erresc: unknown csi ");
1997 csidump();
1998 /* die(""); */
1999 break;
2000 case '@': /* ICH -- Insert <n> blank char */
2001 DEFAULT(csiescseq.arg[0], 1);
2002 tinsertblank(csiescseq.arg[0]);
2003 break;
2004 case 'A': /* CUU -- Cursor <n> Up */
2005 DEFAULT(csiescseq.arg[0], 1);
2006 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
2007 break;
2008 case 'B': /* CUD -- Cursor <n> Down */
2009 case 'e': /* VPR --Cursor <n> Down */
2010 DEFAULT(csiescseq.arg[0], 1);
2011 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
2012 break;
2013 case 'i': /* MC -- Media Copy */
2014 switch(csiescseq.arg[0]) {
2015 case 0:
2016 tdump();
2017 break;
2018 case 1:
2019 tdumpline(term.c.y);
2020 break;
2021 case 2:
2022 tdumpsel();
2023 break;
2024 case 4:
2025 term.mode &= ~MODE_PRINT;
2026 break;
2027 case 5:
2028 term.mode |= MODE_PRINT;
2029 break;
2030 }
2031 break;
2032 case 'c': /* DA -- Device Attributes */
2033 if(csiescseq.arg[0] == 0)
2034 ttywrite(vtiden, sizeof(vtiden) - 1);
2035 break;
2036 case 'C': /* CUF -- Cursor <n> Forward */
2037 case 'a': /* HPR -- Cursor <n> Forward */
2038 DEFAULT(csiescseq.arg[0], 1);
2039 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
2040 break;
2041 case 'D': /* CUB -- Cursor <n> Backward */
2042 DEFAULT(csiescseq.arg[0], 1);
2043 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
2044 break;
2045 case 'E': /* CNL -- Cursor <n> Down and first col */
2046 DEFAULT(csiescseq.arg[0], 1);
2047 tmoveto(0, term.c.y+csiescseq.arg[0]);
2048 break;
2049 case 'F': /* CPL -- Cursor <n> Up and first col */
2050 DEFAULT(csiescseq.arg[0], 1);
2051 tmoveto(0, term.c.y-csiescseq.arg[0]);
2052 break;
2053 case 'g': /* TBC -- Tabulation clear */
2054 switch(csiescseq.arg[0]) {
2055 case 0: /* clear current tab stop */
2056 term.tabs[term.c.x] = 0;
2057 break;
2058 case 3: /* clear all the tabs */
2059 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
2060 break;
2061 default:
2062 goto unknown;
2063 }
2064 break;
2065 case 'G': /* CHA -- Move to <col> */
2066 case '`': /* HPA */
2067 DEFAULT(csiescseq.arg[0], 1);
2068 tmoveto(csiescseq.arg[0]-1, term.c.y);
2069 break;
2070 case 'H': /* CUP -- Move to <row> <col> */
2071 case 'f': /* HVP */
2072 DEFAULT(csiescseq.arg[0], 1);
2073 DEFAULT(csiescseq.arg[1], 1);
2074 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
2075 break;
2076 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
2077 DEFAULT(csiescseq.arg[0], 1);
2078 tputtab(csiescseq.arg[0]);
2079 break;
2080 case 'J': /* ED -- Clear screen */
2081 selclear(NULL);
2082 switch(csiescseq.arg[0]) {
2083 case 0: /* below */
2084 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
2085 if(term.c.y < term.row-1) {
2086 tclearregion(0, term.c.y+1, term.col-1,
2087 term.row-1);
2088 }
2089 break;
2090 case 1: /* above */
2091 if(term.c.y > 1)
2092 tclearregion(0, 0, term.col-1, term.c.y-1);
2093 tclearregion(0, term.c.y, term.c.x, term.c.y);
2094 break;
2095 case 2: /* all */
2096 tclearregion(0, 0, term.col-1, term.row-1);
2097 break;
2098 default:
2099 goto unknown;
2100 }
2101 break;
2102 case 'K': /* EL -- Clear line */
2103 switch(csiescseq.arg[0]) {
2104 case 0: /* right */
2105 tclearregion(term.c.x, term.c.y, term.col-1,
2106 term.c.y);
2107 break;
2108 case 1: /* left */
2109 tclearregion(0, term.c.y, term.c.x, term.c.y);
2110 break;
2111 case 2: /* all */
2112 tclearregion(0, term.c.y, term.col-1, term.c.y);
2113 break;
2114 }
2115 break;
2116 case 'S': /* SU -- Scroll <n> line up */
2117 DEFAULT(csiescseq.arg[0], 1);
2118 tscrollup(term.top, csiescseq.arg[0]);
2119 break;
2120 case 'T': /* SD -- Scroll <n> line down */
2121 DEFAULT(csiescseq.arg[0], 1);
2122 tscrolldown(term.top, csiescseq.arg[0]);
2123 break;
2124 case 'L': /* IL -- Insert <n> blank lines */
2125 DEFAULT(csiescseq.arg[0], 1);
2126 tinsertblankline(csiescseq.arg[0]);
2127 break;
2128 case 'l': /* RM -- Reset Mode */
2129 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
2130 break;
2131 case 'M': /* DL -- Delete <n> lines */
2132 DEFAULT(csiescseq.arg[0], 1);
2133 tdeleteline(csiescseq.arg[0]);
2134 break;
2135 case 'X': /* ECH -- Erase <n> char */
2136 DEFAULT(csiescseq.arg[0], 1);
2137 tclearregion(term.c.x, term.c.y,
2138 term.c.x + csiescseq.arg[0] - 1, term.c.y);
2139 break;
2140 case 'P': /* DCH -- Delete <n> char */
2141 DEFAULT(csiescseq.arg[0], 1);
2142 tdeletechar(csiescseq.arg[0]);
2143 break;
2144 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
2145 DEFAULT(csiescseq.arg[0], 1);
2146 tputtab(-csiescseq.arg[0]);
2147 break;
2148 case 'd': /* VPA -- Move to <row> */
2149 DEFAULT(csiescseq.arg[0], 1);
2150 tmoveato(term.c.x, csiescseq.arg[0]-1);
2151 break;
2152 case 'h': /* SM -- Set terminal mode */
2153 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
2154 break;
2155 case 'm': /* SGR -- Terminal attribute (color) */
2156 tsetattr(csiescseq.arg, csiescseq.narg);
2157 break;
2158 case 'n': /* DSR – Device Status Report (cursor position) */
2159 if (csiescseq.arg[0] == 6) {
2160 len = snprintf(buf, sizeof(buf),"\033[%i;%iR",
2161 term.c.y+1, term.c.x+1);
2162 ttywrite(buf, len);
2163 }
2164 break;
2165 case 'r': /* DECSTBM -- Set Scrolling Region */
2166 if(csiescseq.priv) {
2167 goto unknown;
2168 } else {
2169 DEFAULT(csiescseq.arg[0], 1);
2170 DEFAULT(csiescseq.arg[1], term.row);
2171 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
2172 tmoveato(0, 0);
2173 }
2174 break;
2175 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
2176 tcursor(CURSOR_SAVE);
2177 break;
2178 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
2179 tcursor(CURSOR_LOAD);
2180 break;
2181 case ' ':
2182 switch (csiescseq.mode[1]) {
2183 case 'q': /* DECSCUSR -- Set Cursor Style */
2184 DEFAULT(csiescseq.arg[0], 1);
2185 if (!BETWEEN(csiescseq.arg[0], 0, 6)) {
2186 goto unknown;
2187 }
2188 xw.cursor = csiescseq.arg[0];
2189 break;
2190 default:
2191 goto unknown;
2192 }
2193 break;
2194 }
2195 }
2196
2197 void
2198 csidump(void) {
2199 int i;
2200 uint c;
2201
2202 printf("ESC[");
2203 for(i = 0; i < csiescseq.len; i++) {
2204 c = csiescseq.buf[i] & 0xff;
2205 if(isprint(c)) {
2206 putchar(c);
2207 } else if(c == '\n') {
2208 printf("(\\n)");
2209 } else if(c == '\r') {
2210 printf("(\\r)");
2211 } else if(c == 0x1b) {
2212 printf("(\\e)");
2213 } else {
2214 printf("(%02x)", c);
2215 }
2216 }
2217 putchar('\n');
2218 }
2219
2220 void
2221 csireset(void) {
2222 memset(&csiescseq, 0, sizeof(csiescseq));
2223 }
2224
2225 void
2226 strhandle(void) {
2227 char *p = NULL;
2228 int j, narg, par;
2229
2230 term.esc &= ~(ESC_STR_END|ESC_STR);
2231 strparse();
2232 narg = strescseq.narg;
2233 par = atoi(strescseq.args[0]);
2234
2235 switch(strescseq.type) {
2236 case ']': /* OSC -- Operating System Command */
2237 switch(par) {
2238 case 0:
2239 case 1:
2240 case 2:
2241 if(narg > 1)
2242 xsettitle(strescseq.args[1]);
2243 return;
2244 case 4: /* color set */
2245 if(narg < 3)
2246 break;
2247 p = strescseq.args[2];
2248 /* FALLTHROUGH */
2249 case 104: /* color reset, here p = NULL */
2250 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2251 if(xsetcolorname(j, p)) {
2252 fprintf(stderr, "erresc: invalid color %s\n", p);
2253 } else {
2254 /*
2255 * TODO if defaultbg color is changed, borders
2256 * are dirty
2257 */
2258 redraw();
2259 }
2260 return;
2261 }
2262 break;
2263 case 'k': /* old title set compatibility */
2264 xsettitle(strescseq.args[0]);
2265 return;
2266 case 'P': /* DCS -- Device Control String */
2267 case '_': /* APC -- Application Program Command */
2268 case '^': /* PM -- Privacy Message */
2269 return;
2270 }
2271
2272 fprintf(stderr, "erresc: unknown str ");
2273 strdump();
2274 }
2275
2276 void
2277 strparse(void) {
2278 int c;
2279 char *p = strescseq.buf;
2280
2281 strescseq.narg = 0;
2282 strescseq.buf[strescseq.len] = '\0';
2283
2284 if(*p == '\0')
2285 return;
2286
2287 while(strescseq.narg < STR_ARG_SIZ) {
2288 strescseq.args[strescseq.narg++] = p;
2289 while((c = *p) != ';' && c != '\0')
2290 ++p;
2291 if(c == '\0')
2292 return;
2293 *p++ = '\0';
2294 }
2295 }
2296
2297 void
2298 strdump(void) {
2299 int i;
2300 uint c;
2301
2302 printf("ESC%c", strescseq.type);
2303 for(i = 0; i < strescseq.len; i++) {
2304 c = strescseq.buf[i] & 0xff;
2305 if(c == '\0') {
2306 return;
2307 } else if(isprint(c)) {
2308 putchar(c);
2309 } else if(c == '\n') {
2310 printf("(\\n)");
2311 } else if(c == '\r') {
2312 printf("(\\r)");
2313 } else if(c == 0x1b) {
2314 printf("(\\e)");
2315 } else {
2316 printf("(%02x)", c);
2317 }
2318 }
2319 printf("ESC\\\n");
2320 }
2321
2322 void
2323 strreset(void) {
2324 memset(&strescseq, 0, sizeof(strescseq));
2325 }
2326
2327 void
2328 tprinter(char *s, size_t len) {
2329 if(iofd != -1 && xwrite(iofd, s, len) < 0) {
2330 fprintf(stderr, "Error writing in %s:%s\n",
2331 opt_io, strerror(errno));
2332 close(iofd);
2333 iofd = -1;
2334 }
2335 }
2336
2337 void
2338 toggleprinter(const Arg *arg) {
2339 term.mode ^= MODE_PRINT;
2340 }
2341
2342 void
2343 printscreen(const Arg *arg) {
2344 tdump();
2345 }
2346
2347 void
2348 printsel(const Arg *arg) {
2349 tdumpsel();
2350 }
2351
2352 void
2353 tdumpsel(void) {
2354 char *ptr;
2355
2356 if((ptr = getsel())) {
2357 tprinter(ptr, strlen(ptr));
2358 free(ptr);
2359 }
2360 }
2361
2362 void
2363 tdumpline(int n) {
2364 Glyph *bp, *end;
2365
2366 bp = &term.line[n][0];
2367 end = &bp[MIN(tlinelen(n), term.col) - 1];
2368 if(bp != end || bp->c[0] != ' ') {
2369 for( ;bp <= end; ++bp)
2370 tprinter(bp->c, utf8len(bp->c));
2371 }
2372 tprinter("\n", 1);
2373 }
2374
2375 void
2376 tdump(void) {
2377 int i;
2378
2379 for(i = 0; i < term.row; ++i)
2380 tdumpline(i);
2381 }
2382
2383 void
2384 tputtab(int n) {
2385 uint x = term.c.x;
2386
2387 if(n > 0) {
2388 while(x < term.col && n--)
2389 for(++x; x < term.col && !term.tabs[x]; ++x)
2390 /* nothing */ ;
2391 } else if(n < 0) {
2392 while(x > 0 && n++)
2393 for(--x; x > 0 && !term.tabs[x]; --x)
2394 /* nothing */ ;
2395 }
2396 tmoveto(x, term.c.y);
2397 }
2398
2399 void
2400 techo(char *buf, int len) {
2401 for(; len > 0; buf++, len--) {
2402 char c = *buf;
2403
2404 if(ISCONTROL((uchar) c)) { /* control code */
2405 if(c & 0x80) {
2406 c &= 0x7f;
2407 tputc("^", 1);
2408 tputc("[", 1);
2409 } else if(c != '\n' && c != '\r' && c != '\t') {
2410 c ^= 0x40;
2411 tputc("^", 1);
2412 }
2413 tputc(&c, 1);
2414 } else {
2415 break;
2416 }
2417 }
2418 if(len)
2419 tputc(buf, len);
2420 }
2421
2422 void
2423 tdeftran(char ascii) {
2424 static char cs[] = "0B";
2425 static int vcs[] = {CS_GRAPHIC0, CS_USA};
2426 char *p;
2427
2428 if((p = strchr(cs, ascii)) == NULL) {
2429 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2430 } else {
2431 term.trantbl[term.icharset] = vcs[p - cs];
2432 }
2433 }
2434
2435 void
2436 tdectest(char c) {
2437 static char E[UTF_SIZ] = "E";
2438 int x, y;
2439
2440 if(c == '8') { /* DEC screen alignment test. */
2441 for(x = 0; x < term.col; ++x) {
2442 for(y = 0; y < term.row; ++y)
2443 tsetchar(E, &term.c.attr, x, y);
2444 }
2445 }
2446 }
2447
2448 void
2449 tstrsequence(uchar c) {
2450 if (c & 0x80) {
2451 switch (c) {
2452 case 0x90: /* DCS -- Device Control String */
2453 c = 'P';
2454 break;
2455 case 0x9f: /* APC -- Application Program Command */
2456 c = '_';
2457 break;
2458 case 0x9e: /* PM -- Privacy Message */
2459 c = '^';
2460 break;
2461 case 0x9d: /* OSC -- Operating System Command */
2462 c = ']';
2463 break;
2464 }
2465 }
2466 strreset();
2467 strescseq.type = c;
2468 term.esc |= ESC_STR;
2469 return;
2470 }
2471
2472 void
2473 tcontrolcode(uchar ascii) {
2474 static char question[UTF_SIZ] = "?";
2475
2476 switch(ascii) {
2477 case '\t': /* HT */
2478 tputtab(1);
2479 return;
2480 case '\b': /* BS */
2481 tmoveto(term.c.x-1, term.c.y);
2482 return;
2483 case '\r': /* CR */
2484 tmoveto(0, term.c.y);
2485 return;
2486 case '\f': /* LF */
2487 case '\v': /* VT */
2488 case '\n': /* LF */
2489 /* go to first col if the mode is set */
2490 tnewline(IS_SET(MODE_CRLF));
2491 return;
2492 case '\a': /* BEL */
2493 if(term.esc & ESC_STR_END) {
2494 /* backwards compatibility to xterm */
2495 strhandle();
2496 } else {
2497 if(!(xw.state & WIN_FOCUSED))
2498 xseturgency(1);
2499 if (bellvolume)
2500 XkbBell(xw.dpy, xw.win, bellvolume, (Atom)NULL);
2501 }
2502 break;
2503 case '\033': /* ESC */
2504 csireset();
2505 term.esc &= ~(ESC_CSI|ESC_ALTCHARSET|ESC_TEST);
2506 term.esc |= ESC_START;
2507 return;
2508 case '\016': /* SO (LS1 -- Locking shift 1) */
2509 case '\017': /* SI (LS0 -- Locking shift 0) */
2510 term.charset = 1 - (ascii - '\016');
2511 return;
2512 case '\032': /* SUB */
2513 tsetchar(question, &term.c.attr, term.c.x, term.c.y);
2514 case '\030': /* CAN */
2515 csireset();
2516 break;
2517 case '\005': /* ENQ (IGNORED) */
2518 case '\000': /* NUL (IGNORED) */
2519 case '\021': /* XON (IGNORED) */
2520 case '\023': /* XOFF (IGNORED) */
2521 case 0177: /* DEL (IGNORED) */
2522 return;
2523 case 0x84: /* TODO: IND */
2524 break;
2525 case 0x85: /* NEL -- Next line */
2526 tnewline(1); /* always go to first col */
2527 break;
2528 case 0x88: /* HTS -- Horizontal tab stop */
2529 term.tabs[term.c.x] = 1;
2530 break;
2531 case 0x8d: /* TODO: RI */
2532 case 0x8e: /* TODO: SS2 */
2533 case 0x8f: /* TODO: SS3 */
2534 case 0x98: /* TODO: SOS */
2535 break;
2536 case 0x9a: /* DECID -- Identify Terminal */
2537 ttywrite(vtiden, sizeof(vtiden) - 1);
2538 break;
2539 case 0x9b: /* TODO: CSI */
2540 case 0x9c: /* TODO: ST */
2541 break;
2542 case 0x90: /* DCS -- Device Control String */
2543 case 0x9f: /* APC -- Application Program Command */
2544 case 0x9e: /* PM -- Privacy Message */
2545 case 0x9d: /* OSC -- Operating System Command */
2546 tstrsequence(ascii);
2547 return;
2548 }
2549 /* only CAN, SUB, \a and C1 chars interrupt a sequence */
2550 term.esc &= ~(ESC_STR_END|ESC_STR);
2551 return;
2552 }
2553
2554 /*
2555 * returns 1 when the sequence is finished and it hasn't to read
2556 * more characters for this sequence, otherwise 0
2557 */
2558 int
2559 eschandle(uchar ascii) {
2560 switch(ascii) {
2561 case '[':
2562 term.esc |= ESC_CSI;
2563 return 0;
2564 case '#':
2565 term.esc |= ESC_TEST;
2566 return 0;
2567 case 'P': /* DCS -- Device Control String */
2568 case '_': /* APC -- Application Program Command */
2569 case '^': /* PM -- Privacy Message */
2570 case ']': /* OSC -- Operating System Command */
2571 case 'k': /* old title set compatibility */
2572 tstrsequence(ascii);
2573 return 0;
2574 case 'n': /* LS2 -- Locking shift 2 */
2575 case 'o': /* LS3 -- Locking shift 3 */
2576 term.charset = 2 + (ascii - 'n');
2577 break;
2578 case '(': /* GZD4 -- set primary charset G0 */
2579 case ')': /* G1D4 -- set secondary charset G1 */
2580 case '*': /* G2D4 -- set tertiary charset G2 */
2581 case '+': /* G3D4 -- set quaternary charset G3 */
2582 term.icharset = ascii - '(';
2583 term.esc |= ESC_ALTCHARSET;
2584 return 0;
2585 case 'D': /* IND -- Linefeed */
2586 if(term.c.y == term.bot) {
2587 tscrollup(term.top, 1);
2588 } else {
2589 tmoveto(term.c.x, term.c.y+1);
2590 }
2591 break;
2592 case 'E': /* NEL -- Next line */
2593 tnewline(1); /* always go to first col */
2594 break;
2595 case 'H': /* HTS -- Horizontal tab stop */
2596 term.tabs[term.c.x] = 1;
2597 break;
2598 case 'M': /* RI -- Reverse index */
2599 if(term.c.y == term.top) {
2600 tscrolldown(term.top, 1);
2601 } else {
2602 tmoveto(term.c.x, term.c.y-1);
2603 }
2604 break;
2605 case 'Z': /* DECID -- Identify Terminal */
2606 ttywrite(vtiden, sizeof(vtiden) - 1);
2607 break;
2608 case 'c': /* RIS -- Reset to inital state */
2609 treset();
2610 xresettitle();
2611 xloadcols();
2612 break;
2613 case '=': /* DECPAM -- Application keypad */
2614 term.mode |= MODE_APPKEYPAD;
2615 break;
2616 case '>': /* DECPNM -- Normal keypad */
2617 term.mode &= ~MODE_APPKEYPAD;
2618 break;
2619 case '7': /* DECSC -- Save Cursor */
2620 tcursor(CURSOR_SAVE);
2621 break;
2622 case '8': /* DECRC -- Restore Cursor */
2623 tcursor(CURSOR_LOAD);
2624 break;
2625 case '\\': /* ST -- String Terminator */
2626 if(term.esc & ESC_STR_END)
2627 strhandle();
2628 break;
2629 default:
2630 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2631 (uchar) ascii, isprint(ascii)? ascii:'.');
2632 break;
2633 }
2634 return 1;
2635 }
2636
2637 void
2638 tputc(char *c, int len) {
2639 uchar ascii;
2640 bool control;
2641 long unicodep;
2642 int width;
2643 Glyph *gp;
2644
2645 if(len == 1) {
2646 width = 1;
2647 unicodep = ascii = *c;
2648 } else {
2649 utf8decode(c, &unicodep, UTF_SIZ);
2650 if ((width = wcwidth(unicodep)) == -1) {
2651 c = "\357\277\275"; /* UTF_INVALID */
2652 width = 1;
2653 }
2654 ascii = unicodep;
2655 }
2656
2657 if(IS_SET(MODE_PRINT))
2658 tprinter(c, len);
2659 control = ISCONTROL(unicodep);
2660
2661 /*
2662 * STR sequence must be checked before anything else
2663 * because it uses all following characters until it
2664 * receives a ESC, a SUB, a ST or any other C1 control
2665 * character.
2666 */
2667 if(term.esc & ESC_STR) {
2668 if(len == 1 &&
2669 (ascii == '\a' || ascii == 030 ||
2670 ascii == 032 || ascii == 033 ||
2671 ISCONTROLC1(unicodep))) {
2672 term.esc &= ~(ESC_START|ESC_STR);
2673 term.esc |= ESC_STR_END;
2674 } else if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2675 memmove(&strescseq.buf[strescseq.len], c, len);
2676 strescseq.len += len;
2677 return;
2678 } else {
2679 /*
2680 * Here is a bug in terminals. If the user never sends
2681 * some code to stop the str or esc command, then st
2682 * will stop responding. But this is better than
2683 * silently failing with unknown characters. At least
2684 * then users will report back.
2685 *
2686 * In the case users ever get fixed, here is the code:
2687 */
2688 /*
2689 * term.esc = 0;
2690 * strhandle();
2691 */
2692 return;
2693 }
2694 }
2695
2696 /*
2697 * Actions of control codes must be performed as soon they arrive
2698 * because they can be embedded inside a control sequence, and
2699 * they must not cause conflicts with sequences.
2700 */
2701 if(control) {
2702 tcontrolcode(ascii);
2703 /*
2704 * control codes are not shown ever
2705 */
2706 return;
2707 } else if(term.esc & ESC_START) {
2708 if(term.esc & ESC_CSI) {
2709 csiescseq.buf[csiescseq.len++] = ascii;
2710 if(BETWEEN(ascii, 0x40, 0x7E)
2711 || csiescseq.len >= \
2712 sizeof(csiescseq.buf)-1) {
2713 term.esc = 0;
2714 csiparse();
2715 csihandle();
2716 }
2717 return;
2718 } else if(term.esc & ESC_ALTCHARSET) {
2719 tdeftran(ascii);
2720 } else if(term.esc & ESC_TEST) {
2721 tdectest(ascii);
2722 } else {
2723 if (!eschandle(ascii))
2724 return;
2725 /* sequence already finished */
2726 }
2727 term.esc = 0;
2728 /*
2729 * All characters which form part of a sequence are not
2730 * printed
2731 */
2732 return;
2733 }
2734 if(sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
2735 selclear(NULL);
2736
2737 gp = &term.line[term.c.y][term.c.x];
2738 if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2739 gp->mode |= ATTR_WRAP;
2740 tnewline(1);
2741 gp = &term.line[term.c.y][term.c.x];
2742 }
2743
2744 if(IS_SET(MODE_INSERT) && term.c.x+width < term.col)
2745 memmove(gp+width, gp, (term.col - term.c.x - width) * sizeof(Glyph));
2746
2747 if(term.c.x+width > term.col) {
2748 tnewline(1);
2749 gp = &term.line[term.c.y][term.c.x];
2750 }
2751
2752 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2753
2754 if(width == 2) {
2755 gp->mode |= ATTR_WIDE;
2756 if(term.c.x+1 < term.col) {
2757 gp[1].c[0] = '\0';
2758 gp[1].mode = ATTR_WDUMMY;
2759 }
2760 }
2761 if(term.c.x+width < term.col) {
2762 tmoveto(term.c.x+width, term.c.y);
2763 } else {
2764 term.c.state |= CURSOR_WRAPNEXT;
2765 }
2766 }
2767
2768 void
2769 tresize(int col, int row) {
2770 int i;
2771 int minrow = MIN(row, term.row);
2772 int mincol = MIN(col, term.col);
2773 int slide = term.c.y - row + 1;
2774 bool *bp;
2775 TCursor c;
2776
2777 if(col < 1 || row < 1) {
2778 fprintf(stderr,
2779 "tresize: error resizing to %dx%d\n", col, row);
2780 return;
2781 }
2782
2783 /* free unneeded rows */
2784 i = 0;
2785 if(slide > 0) {
2786 /*
2787 * slide screen to keep cursor where we expect it -
2788 * tscrollup would work here, but we can optimize to
2789 * memmove because we're freeing the earlier lines
2790 */
2791 for(/* i = 0 */; i < slide; i++) {
2792 free(term.line[i]);
2793 free(term.alt[i]);
2794 }
2795 memmove(term.line, term.line + slide, row * sizeof(Line));
2796 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2797 }
2798 for(i += row; i < term.row; i++) {
2799 free(term.line[i]);
2800 free(term.alt[i]);
2801 }
2802
2803 /* resize to new height */
2804 term.line = xrealloc(term.line, row * sizeof(Line));
2805 term.alt = xrealloc(term.alt, row * sizeof(Line));
2806 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2807 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2808
2809 /* resize each row to new width, zero-pad if needed */
2810 for(i = 0; i < minrow; i++) {
2811 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2812 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2813 }
2814
2815 /* allocate any new rows */
2816 for(/* i == minrow */; i < row; i++) {
2817 term.line[i] = xmalloc(col * sizeof(Glyph));
2818 term.alt[i] = xmalloc(col * sizeof(Glyph));
2819 }
2820 if(col > term.col) {
2821 bp = term.tabs + term.col;
2822
2823 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2824 while(--bp > term.tabs && !*bp)
2825 /* nothing */ ;
2826 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2827 *bp = 1;
2828 }
2829 /* update terminal size */
2830 term.col = col;
2831 term.row = row;
2832 /* reset scrolling region */
2833 tsetscroll(0, row-1);
2834 /* make use of the LIMIT in tmoveto */
2835 tmoveto(term.c.x, term.c.y);
2836 /* Clearing both screens (it makes dirty all lines) */
2837 c = term.c;
2838 for(i = 0; i < 2; i++) {
2839 if(mincol < col && 0 < minrow) {
2840 tclearregion(mincol, 0, col - 1, minrow - 1);
2841 }
2842 if(0 < col && minrow < row) {
2843 tclearregion(0, minrow, col - 1, row - 1);
2844 }
2845 tswapscreen();
2846 tcursor(CURSOR_LOAD);
2847 }
2848 term.c = c;
2849 }
2850
2851 void
2852 xresize(int col, int row) {
2853 xw.tw = MAX(1, col * xw.cw);
2854 xw.th = MAX(1, row * xw.ch);
2855
2856 XFreePixmap(xw.dpy, xw.buf);
2857 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2858 DefaultDepth(xw.dpy, xw.scr));
2859 XftDrawChange(xw.draw, xw.buf);
2860 xclear(0, 0, xw.w, xw.h);
2861 }
2862
2863 ushort
2864 sixd_to_16bit(int x) {
2865 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2866 }
2867
2868 void
2869 xloadcols(void) {
2870 int i;
2871 XRenderColor color = { .alpha = 0xffff };
2872 static bool loaded;
2873 Color *cp;
2874
2875 if(loaded) {
2876 for (cp = dc.col; cp < dc.col + LEN(dc.col); ++cp)
2877 XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
2878 }
2879
2880 /* load colors [0-15] and [256-LEN(colorname)] (config.h) */
2881 for(i = 0; i < LEN(colorname); i++) {
2882 if(!colorname[i])
2883 continue;
2884 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2885 die("Could not allocate color '%s'\n", colorname[i]);
2886 }
2887 }
2888
2889 /* load colors [16-231] ; same colors as xterm */
2890 for(i = 16; i < 6*6*6+16; i++) {
2891 color.red = sixd_to_16bit( ((i-16)/36)%6 );
2892 color.green = sixd_to_16bit( ((i-16)/6) %6 );
2893 color.blue = sixd_to_16bit( ((i-16)/1) %6 );
2894 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i]))
2895 die("Could not allocate color %d\n", i);
2896 }
2897
2898 /* load colors [232-255] ; grayscale */
2899 for(; i < 256; i++) {
2900 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (i-(6*6*6+16));
2901 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i]))
2902 die("Could not allocate color %d\n", i);
2903 }
2904 loaded = true;
2905 }
2906
2907 int
2908 xsetcolorname(int x, const char *name) {
2909 XRenderColor color = { .alpha = 0xffff };
2910 Color ncolor;
2911
2912 if(!BETWEEN(x, 0, LEN(colorname)))
2913 return 1;
2914
2915 if(!name) {
2916 if(BETWEEN(x, 16, 16 + 215)) { /* 256 color */
2917 color.red = sixd_to_16bit( ((x-16)/36)%6 );
2918 color.green = sixd_to_16bit( ((x-16)/6) %6 );
2919 color.blue = sixd_to_16bit( ((x-16)/1) %6 );
2920 if(!XftColorAllocValue(xw.dpy, xw.vis,
2921 xw.cmap, &color, &ncolor)) {
2922 return 1;
2923 }
2924
2925 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2926 dc.col[x] = ncolor;
2927 return 0;
2928 } else if(BETWEEN(x, 16 + 216, 255)) { /* greyscale */
2929 color.red = color.green = color.blue = \
2930 0x0808 + 0x0a0a * (x - (16 + 216));
2931 if(!XftColorAllocValue(xw.dpy, xw.vis,
2932 xw.cmap, &color, &ncolor)) {
2933 return 1;
2934 }
2935
2936 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2937 dc.col[x] = ncolor;
2938 return 0;
2939 } else { /* system colors */
2940 name = colorname[x];
2941 }
2942 }
2943 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &ncolor))
2944 return 1;
2945
2946 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2947 dc.col[x] = ncolor;
2948 return 0;
2949 }
2950
2951 void
2952 xtermclear(int col1, int row1, int col2, int row2) {
2953 XftDrawRect(xw.draw,
2954 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2955 borderpx + col1 * xw.cw,
2956 borderpx + row1 * xw.ch,
2957 (col2-col1+1) * xw.cw,
2958 (row2-row1+1) * xw.ch);
2959 }
2960
2961 /*
2962 * Absolute coordinates.
2963 */
2964 void
2965 xclear(int x1, int y1, int x2, int y2) {
2966 XftDrawRect(xw.draw,
2967 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2968 x1, y1, x2-x1, y2-y1);
2969 }
2970
2971 void
2972 xhints(void) {
2973 XClassHint class = {opt_class ? opt_class : termname, termname};
2974 XWMHints wm = {.flags = InputHint, .input = 1};
2975 XSizeHints *sizeh = NULL;
2976
2977 sizeh = XAllocSizeHints();
2978
2979 sizeh->flags = PSize | PResizeInc | PBaseSize;
2980 sizeh->height = xw.h;
2981 sizeh->width = xw.w;
2982 sizeh->height_inc = xw.ch;
2983 sizeh->width_inc = xw.cw;
2984 sizeh->base_height = 2 * borderpx;
2985 sizeh->base_width = 2 * borderpx;
2986 if(xw.isfixed == True) {
2987 sizeh->flags |= PMaxSize | PMinSize;
2988 sizeh->min_width = sizeh->max_width = xw.w;
2989 sizeh->min_height = sizeh->max_height = xw.h;
2990 }
2991 if(xw.gm & (XValue|YValue)) {
2992 sizeh->flags |= USPosition | PWinGravity;
2993 sizeh->x = xw.l;
2994 sizeh->y = xw.t;
2995 sizeh->win_gravity = xgeommasktogravity(xw.gm);
2996 }
2997
2998 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
2999 &class);
3000 XFree(sizeh);
3001 }
3002
3003 int
3004 xgeommasktogravity(int mask) {
3005 switch(mask & (XNegative|YNegative)) {
3006 case 0:
3007 return NorthWestGravity;
3008 case XNegative:
3009 return NorthEastGravity;
3010 case YNegative:
3011 return SouthWestGravity;
3012 }
3013 return SouthEastGravity;
3014 }
3015
3016 int
3017 xloadfont(Font *f, FcPattern *pattern) {
3018 FcPattern *match;
3019 FcResult result;
3020
3021 match = FcFontMatch(NULL, pattern, &result);
3022 if(!match)
3023 return 1;
3024
3025 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
3026 FcPatternDestroy(match);
3027 return 1;
3028 }
3029
3030 f->set = NULL;
3031 f->pattern = FcPatternDuplicate(pattern);
3032
3033 f->ascent = f->match->ascent;
3034 f->descent = f->match->descent;
3035 f->lbearing = 0;
3036 f->rbearing = f->match->max_advance_width;
3037
3038 f->height = f->ascent + f->descent;
3039 f->width = f->lbearing + f->rbearing;
3040
3041 return 0;
3042 }
3043
3044 void
3045 xloadfonts(char *fontstr, double fontsize) {
3046 FcPattern *pattern;
3047 FcResult r_sz, r_psz;
3048 double fontval;
3049 float ceilf(float);
3050
3051 if(fontstr[0] == '-') {
3052 pattern = XftXlfdParse(fontstr, False, False);
3053 } else {
3054 pattern = FcNameParse((FcChar8 *)fontstr);
3055 }
3056
3057 if(!pattern)
3058 die("st: can't open font %s\n", fontstr);
3059
3060 if(fontsize > 1) {
3061 FcPatternDel(pattern, FC_PIXEL_SIZE);
3062 FcPatternDel(pattern, FC_SIZE);
3063 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
3064 usedfontsize = fontsize;
3065 } else {
3066 r_psz = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
3067 r_sz = FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval);
3068 if(r_psz == FcResultMatch) {
3069 usedfontsize = fontval;
3070 } else if(r_sz == FcResultMatch) {
3071 usedfontsize = -1;
3072 } else {
3073 /*
3074 * Default font size is 12, if none given. This is to
3075 * have a known usedfontsize value.
3076 */
3077 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
3078 usedfontsize = 12;
3079 }
3080 defaultfontsize = usedfontsize;
3081 }
3082
3083 FcConfigSubstitute(0, pattern, FcMatchPattern);
3084 FcDefaultSubstitute(pattern);
3085
3086 if(xloadfont(&dc.font, pattern))
3087 die("st: can't open font %s\n", fontstr);
3088
3089 if(usedfontsize < 0) {
3090 FcPatternGetDouble(dc.font.match->pattern,
3091 FC_PIXEL_SIZE, 0, &fontval);
3092 usedfontsize = fontval;
3093 if(fontsize == 0)
3094 defaultfontsize = fontval;
3095 }
3096
3097 /* Setting character width and height. */
3098 xw.cw = ceilf(dc.font.width * cwscale);
3099 xw.ch = ceilf(dc.font.height * chscale);
3100
3101 FcPatternDel(pattern, FC_SLANT);
3102 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
3103 if(xloadfont(&dc.ifont, pattern))
3104 die("st: can't open font %s\n", fontstr);
3105
3106 FcPatternDel(pattern, FC_WEIGHT);
3107 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
3108 if(xloadfont(&dc.ibfont, pattern))
3109 die("st: can't open font %s\n", fontstr);
3110
3111 FcPatternDel(pattern, FC_SLANT);
3112 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
3113 if(xloadfont(&dc.bfont, pattern))
3114 die("st: can't open font %s\n", fontstr);
3115
3116 FcPatternDestroy(pattern);
3117 }
3118
3119 int
3120 xloadfontset(Font *f) {
3121 FcResult result;
3122
3123 if(!(f->set = FcFontSort(0, f->pattern, FcTrue, 0, &result)))
3124 return 1;
3125 return 0;
3126 }
3127
3128 void
3129 xunloadfont(Font *f) {
3130 XftFontClose(xw.dpy, f->match);
3131 FcPatternDestroy(f->pattern);
3132 if(f->set)
3133 FcFontSetDestroy(f->set);
3134 }
3135
3136 void
3137 xunloadfonts(void) {
3138 /* Free the loaded fonts in the font cache. */
3139 while(frclen > 0)
3140 XftFontClose(xw.dpy, frc[--frclen].font);
3141
3142 xunloadfont(&dc.font);
3143 xunloadfont(&dc.bfont);
3144 xunloadfont(&dc.ifont);
3145 xunloadfont(&dc.ibfont);
3146 }
3147
3148 void
3149 xzoom(const Arg *arg) {
3150 Arg larg;
3151
3152 larg.i = usedfontsize + arg->i;
3153 xzoomabs(&larg);
3154 }
3155
3156 void
3157 xzoomabs(const Arg *arg) {
3158 xunloadfonts();
3159 xloadfonts(usedfont, arg->i);
3160 cresize(0, 0);
3161 redraw();
3162 xhints();
3163 }
3164
3165 void
3166 xzoomreset(const Arg *arg) {
3167 Arg larg;
3168
3169 if(defaultfontsize > 0) {
3170 larg.i = defaultfontsize;
3171 xzoomabs(&larg);
3172 }
3173 }
3174
3175 void
3176 xinit(void) {
3177 XGCValues gcvalues;
3178 Cursor cursor;
3179 Window parent;
3180 pid_t thispid = getpid();
3181
3182 if(!(xw.dpy = XOpenDisplay(NULL)))
3183 die("Can't open display\n");
3184 xw.scr = XDefaultScreen(xw.dpy);
3185 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
3186
3187 /* font */
3188 if(!FcInit())
3189 die("Could not init fontconfig.\n");
3190
3191 usedfont = (opt_font == NULL)? font : opt_font;
3192 xloadfonts(usedfont, 0);
3193
3194 /* colors */
3195 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
3196 xloadcols();
3197
3198 /* adjust fixed window geometry */
3199 xw.w = 2 * borderpx + term.col * xw.cw;
3200 xw.h = 2 * borderpx + term.row * xw.ch;
3201 if(xw.gm & XNegative)
3202 xw.l += DisplayWidth(xw.dpy, xw.scr) - xw.w - 2;
3203 if(xw.gm & YNegative)
3204 xw.t += DisplayWidth(xw.dpy, xw.scr) - xw.h - 2;
3205
3206 /* Events */
3207 xw.attrs.background_pixel = dc.col[defaultbg].pixel;
3208 xw.attrs.border_pixel = dc.col[defaultbg].pixel;
3209 xw.attrs.bit_gravity = NorthWestGravity;
3210 xw.attrs.event_mask = FocusChangeMask | KeyPressMask
3211 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
3212 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
3213 xw.attrs.colormap = xw.cmap;
3214
3215 if (!(opt_embed && (parent = strtol(opt_embed, NULL, 0))))
3216 parent = XRootWindow(xw.dpy, xw.scr);
3217 xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
3218 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
3219 xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
3220 | CWEventMask | CWColormap, &xw.attrs);
3221
3222 memset(&gcvalues, 0, sizeof(gcvalues));
3223 gcvalues.graphics_exposures = False;
3224 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
3225 &gcvalues);
3226 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
3227 DefaultDepth(xw.dpy, xw.scr));
3228 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
3229 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
3230
3231 /* Xft rendering context */
3232 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
3233
3234 /* input methods */
3235 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3236 XSetLocaleModifiers("@im=local");
3237 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3238 XSetLocaleModifiers("@im=");
3239 if((xw.xim = XOpenIM(xw.dpy,
3240 NULL, NULL, NULL)) == NULL) {
3241 die("XOpenIM failed. Could not open input"
3242 " device.\n");
3243 }
3244 }
3245 }
3246 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
3247 | XIMStatusNothing, XNClientWindow, xw.win,
3248 XNFocusWindow, xw.win, NULL);
3249 if(xw.xic == NULL)
3250 die("XCreateIC failed. Could not obtain input method.\n");
3251
3252 /* white cursor, black outline */
3253 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
3254 XDefineCursor(xw.dpy, xw.win, cursor);
3255 XRecolorCursor(xw.dpy, cursor,
3256 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
3257 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
3258
3259 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
3260 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
3261 xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
3262 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
3263
3264 xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
3265 XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
3266 PropModeReplace, (uchar *)&thispid, 1);
3267
3268 xresettitle();
3269 XMapWindow(xw.dpy, xw.win);
3270 xhints();
3271 XSync(xw.dpy, False);
3272 }
3273
3274 void
3275 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
3276 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
3277 width = charlen * xw.cw, xp, i;
3278 int frcflags, charexists;
3279 int u8fl, u8fblen, u8cblen, doesexist;
3280 char *u8c, *u8fs;
3281 long unicodep;
3282 Font *font = &dc.font;
3283 FcResult fcres;
3284 FcPattern *fcpattern, *fontpattern;
3285 FcFontSet *fcsets[] = { NULL };
3286 FcCharSet *fccharset;
3287 Color *fg, *bg, *temp, revfg, revbg, truefg, truebg;
3288 XRenderColor colfg, colbg;
3289 XRectangle r;
3290 int oneatatime;
3291
3292 frcflags = FRC_NORMAL;
3293
3294 if(base.mode & ATTR_ITALIC) {
3295 if(base.fg == defaultfg)
3296 base.fg = defaultitalic;
3297 font = &dc.ifont;
3298 frcflags = FRC_ITALIC;
3299 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
3300 if(base.fg == defaultfg)
3301 base.fg = defaultitalic;
3302 font = &dc.ibfont;
3303 frcflags = FRC_ITALICBOLD;
3304 } else if(base.mode & ATTR_UNDERLINE) {
3305 if(base.fg == defaultfg)
3306 base.fg = defaultunderline;
3307 }
3308
3309 if(IS_TRUECOL(base.fg)) {
3310 colfg.alpha = 0xffff;
3311 colfg.red = TRUERED(base.fg);
3312 colfg.green = TRUEGREEN(base.fg);
3313 colfg.blue = TRUEBLUE(base.fg);
3314 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
3315 fg = &truefg;
3316 } else {
3317 fg = &dc.col[base.fg];
3318 }
3319
3320 if(IS_TRUECOL(base.bg)) {
3321 colbg.alpha = 0xffff;
3322 colbg.green = TRUEGREEN(base.bg);
3323 colbg.red = TRUERED(base.bg);
3324 colbg.blue = TRUEBLUE(base.bg);
3325 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
3326 bg = &truebg;
3327 } else {
3328 bg = &dc.col[base.bg];
3329 }
3330
3331 if(base.mode & ATTR_BOLD) {
3332 /*
3333 * change basic system colors [0-7]
3334 * to bright system colors [8-15]
3335 */
3336 if(BETWEEN(base.fg, 0, 7) && !(base.mode & ATTR_FAINT))
3337 fg = &dc.col[base.fg + 8];
3338
3339 if(base.mode & ATTR_ITALIC) {
3340 font = &dc.ibfont;
3341 frcflags = FRC_ITALICBOLD;
3342 } else {
3343 font = &dc.bfont;
3344 frcflags = FRC_BOLD;
3345 }
3346 }
3347
3348 if(IS_SET(MODE_REVERSE)) {
3349 if(fg == &dc.col[defaultfg]) {
3350 fg = &dc.col[defaultbg];
3351 } else {
3352 colfg.red = ~fg->color.red;
3353 colfg.green = ~fg->color.green;
3354 colfg.blue = ~fg->color.blue;
3355 colfg.alpha = fg->color.alpha;
3356 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
3357 &revfg);
3358 fg = &revfg;
3359 }
3360
3361 if(bg == &dc.col[defaultbg]) {
3362 bg = &dc.col[defaultfg];
3363 } else {
3364 colbg.red = ~bg->color.red;
3365 colbg.green = ~bg->color.green;
3366 colbg.blue = ~bg->color.blue;
3367 colbg.alpha = bg->color.alpha;
3368 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
3369 &revbg);
3370 bg = &revbg;
3371 }
3372 }
3373
3374 if(base.mode & ATTR_REVERSE) {
3375 temp = fg;
3376 fg = bg;
3377 bg = temp;
3378 }
3379
3380 if(base.mode & ATTR_FAINT && !(base.mode & ATTR_BOLD)) {
3381 colfg.red = fg->color.red / 2;
3382 colfg.green = fg->color.green / 2;
3383 colfg.blue = fg->color.blue / 2;
3384 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
3385 fg = &revfg;
3386 }
3387
3388 if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
3389 fg = bg;
3390
3391 if(base.mode & ATTR_INVISIBLE)
3392 fg = bg;
3393
3394 /* Intelligent cleaning up of the borders. */
3395 if(x == 0) {
3396 xclear(0, (y == 0)? 0 : winy, borderpx,
3397 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
3398 }
3399 if(x + charlen >= term.col) {
3400 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
3401 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
3402 }
3403 if(y == 0)
3404 xclear(winx, 0, winx + width, borderpx);
3405 if(y == term.row-1)
3406 xclear(winx, winy + xw.ch, winx + width, xw.h);
3407
3408 /* Clean up the region we want to draw to. */
3409 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
3410
3411 /* Set the clip region because Xft is sometimes dirty. */
3412 r.x = 0;
3413 r.y = 0;
3414 r.height = xw.ch;
3415 r.width = width;
3416 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
3417
3418 for(xp = winx; bytelen > 0;) {
3419 /*
3420 * Search for the range in the to be printed string of glyphs
3421 * that are in the main font. Then print that range. If
3422 * some glyph is found that is not in the font, do the
3423 * fallback dance.
3424 */
3425 u8fs = s;
3426 u8fblen = 0;
3427 u8fl = 0;
3428 oneatatime = font->width != xw.cw;
3429 for(;;) {
3430 u8c = s;
3431 u8cblen = utf8decode(s, &unicodep, UTF_SIZ);
3432 s += u8cblen;
3433 bytelen -= u8cblen;
3434
3435 doesexist = XftCharExists(xw.dpy, font->match, unicodep);
3436 if(doesexist) {
3437 u8fl++;
3438 u8fblen += u8cblen;
3439 if(!oneatatime && bytelen > 0)
3440 continue;
3441 }
3442
3443 if(u8fl > 0) {
3444 XftDrawStringUtf8(xw.draw, fg,
3445 font->match, xp,
3446 winy + font->ascent,
3447 (FcChar8 *)u8fs,
3448 u8fblen);
3449 xp += xw.cw * u8fl;
3450 }
3451 break;
3452 }
3453 if(doesexist) {
3454 if(oneatatime)
3455 continue;
3456 break;
3457 }
3458
3459 /* Search the font cache. */
3460 for(i = 0; i < frclen; i++) {
3461 charexists = XftCharExists(xw.dpy, frc[i].font, unicodep);
3462 /* Everything correct. */
3463 if(charexists && frc[i].flags == frcflags)
3464 break;
3465 /* We got a default font for a not found glyph. */
3466 if(!charexists && frc[i].flags == frcflags \
3467 && frc[i].unicodep == unicodep) {
3468 break;
3469 }
3470 }
3471
3472 /* Nothing was found. */
3473 if(i >= frclen) {
3474 if(!font->set)
3475 xloadfontset(font);
3476 fcsets[0] = font->set;
3477
3478 /*
3479 * Nothing was found in the cache. Now use
3480 * some dozen of Fontconfig calls to get the
3481 * font for one single character.
3482 *
3483 * Xft and fontconfig are design failures.
3484 */
3485 fcpattern = FcPatternDuplicate(font->pattern);
3486 fccharset = FcCharSetCreate();
3487
3488 FcCharSetAddChar(fccharset, unicodep);
3489 FcPatternAddCharSet(fcpattern, FC_CHARSET,
3490 fccharset);
3491 FcPatternAddBool(fcpattern, FC_SCALABLE,
3492 FcTrue);
3493
3494 FcConfigSubstitute(0, fcpattern,
3495 FcMatchPattern);
3496 FcDefaultSubstitute(fcpattern);
3497
3498 fontpattern = FcFontSetMatch(0, fcsets, 1,
3499 fcpattern, &fcres);
3500
3501 /*
3502 * Overwrite or create the new cache entry.
3503 */
3504 if(frclen >= LEN(frc)) {
3505 frclen = LEN(frc) - 1;
3506 XftFontClose(xw.dpy, frc[frclen].font);
3507 frc[frclen].unicodep = 0;
3508 }
3509
3510 frc[frclen].font = XftFontOpenPattern(xw.dpy,
3511 fontpattern);
3512 frc[frclen].flags = frcflags;
3513 frc[frclen].unicodep = unicodep;
3514
3515 i = frclen;
3516 frclen++;
3517
3518 FcPatternDestroy(fcpattern);
3519 FcCharSetDestroy(fccharset);
3520 }
3521
3522 XftDrawStringUtf8(xw.draw, fg, frc[i].font,
3523 xp, winy + frc[i].font->ascent,
3524 (FcChar8 *)u8c, u8cblen);
3525
3526 xp += xw.cw * wcwidth(unicodep);
3527 }
3528
3529 /*
3530 * This is how the loop above actually should be. Why does the
3531 * application have to care about font details?
3532 *
3533 * I have to repeat: Xft and Fontconfig are design failures.
3534 */
3535 /*
3536 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
3537 winy + font->ascent, (FcChar8 *)s, bytelen);
3538 */
3539
3540 if(base.mode & ATTR_UNDERLINE) {
3541 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
3542 width, 1);
3543 }
3544
3545 if(base.mode & ATTR_STRUCK) {
3546 XftDrawRect(xw.draw, fg, winx, winy + 2 * font->ascent / 3,
3547 width, 1);
3548 }
3549
3550 /* Reset clip to none. */
3551 XftDrawSetClip(xw.draw, 0);
3552 }
3553
3554 void
3555 xdrawcursor(void) {
3556 static int oldx = 0, oldy = 0;
3557 int sl, width, curx;
3558 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
3559
3560 LIMIT(oldx, 0, term.col-1);
3561 LIMIT(oldy, 0, term.row-1);
3562
3563 curx = term.c.x;
3564
3565 /* adjust position if in dummy */
3566 if(term.line[oldy][oldx].mode & ATTR_WDUMMY)
3567 oldx--;
3568 if(term.line[term.c.y][curx].mode & ATTR_WDUMMY)
3569 curx--;
3570
3571 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
3572
3573 /* remove the old cursor */
3574 sl = utf8len(term.line[oldy][oldx].c);
3575 width = (term.line[oldy][oldx].mode & ATTR_WIDE)? 2 : 1;
3576 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
3577 oldy, width, sl);
3578
3579 if(IS_SET(MODE_HIDE))
3580 return;
3581
3582 /* draw the new one */
3583 if(xw.state & WIN_FOCUSED) {
3584 switch (xw.cursor) {
3585 case 0: /* Blinking Block */
3586 case 1: /* Blinking Block (Default) */
3587 case 2: /* Steady Block */
3588 if(IS_SET(MODE_REVERSE)) {
3589 g.mode |= ATTR_REVERSE;
3590 g.fg = defaultcs;
3591 g.bg = defaultfg;
3592 }
3593
3594 sl = utf8len(g.c);
3595 width = (term.line[term.c.y][curx].mode & ATTR_WIDE)\
3596 ? 2 : 1;
3597 xdraws(g.c, g, term.c.x, term.c.y, width, sl);
3598 break;
3599 case 3: /* Blinking Underline */
3600 case 4: /* Steady Underline */
3601 XftDrawRect(xw.draw, &dc.col[defaultcs],
3602 borderpx + curx * xw.cw,
3603 borderpx + (term.c.y + 1) * xw.ch - 1,
3604 xw.cw, 1);
3605 break;
3606 case 5: /* Blinking bar */
3607 case 6: /* Steady bar */
3608 XftDrawRect(xw.draw, &dc.col[defaultcs],
3609 borderpx + curx * xw.cw,
3610 borderpx + term.c.y * xw.ch,
3611 1, xw.ch);
3612 break;
3613 }
3614 } else {
3615 XftDrawRect(xw.draw, &dc.col[defaultcs],
3616 borderpx + curx * xw.cw,
3617 borderpx + term.c.y * xw.ch,
3618 xw.cw - 1, 1);
3619 XftDrawRect(xw.draw, &dc.col[defaultcs],
3620 borderpx + curx * xw.cw,
3621 borderpx + term.c.y * xw.ch,
3622 1, xw.ch - 1);
3623 XftDrawRect(xw.draw, &dc.col[defaultcs],
3624 borderpx + (curx + 1) * xw.cw - 1,
3625 borderpx + term.c.y * xw.ch,
3626 1, xw.ch - 1);
3627 XftDrawRect(xw.draw, &dc.col[defaultcs],
3628 borderpx + curx * xw.cw,
3629 borderpx + (term.c.y + 1) * xw.ch - 1,
3630 xw.cw, 1);
3631 }
3632 oldx = curx, oldy = term.c.y;
3633 }
3634
3635
3636 void
3637 xsettitle(char *p) {
3638 XTextProperty prop;
3639
3640 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3641 &prop);
3642 XSetWMName(xw.dpy, xw.win, &prop);
3643 XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
3644 XFree(prop.value);
3645 }
3646
3647 void
3648 xresettitle(void) {
3649 xsettitle(opt_title ? opt_title : "st");
3650 }
3651
3652 void
3653 redraw(void) {
3654 tfulldirt();
3655 draw();
3656 }
3657
3658 void
3659 draw(void) {
3660 drawregion(0, 0, term.col, term.row);
3661 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3662 xw.h, 0, 0);
3663 XSetForeground(xw.dpy, dc.gc,
3664 dc.col[IS_SET(MODE_REVERSE)?
3665 defaultfg : defaultbg].pixel);
3666 }
3667
3668 void
3669 drawregion(int x1, int y1, int x2, int y2) {
3670 int ic, ib, x, y, ox, sl;
3671 Glyph base, new;
3672 char buf[DRAW_BUF_SIZ];
3673 bool ena_sel = sel.ob.x != -1 && sel.alt == IS_SET(MODE_ALTSCREEN);
3674 long unicodep;
3675
3676 if(!(xw.state & WIN_VISIBLE))
3677 return;
3678
3679 for(y = y1; y < y2; y++) {
3680 if(!term.dirty[y])
3681 continue;
3682
3683 xtermclear(0, y, term.col, y);
3684 term.dirty[y] = 0;
3685 base = term.line[y][0];
3686 ic = ib = ox = 0;
3687 for(x = x1; x < x2; x++) {
3688 new = term.line[y][x];
3689 if(new.mode == ATTR_WDUMMY)
3690 continue;
3691 if(ena_sel && selected(x, y))
3692 new.mode ^= ATTR_REVERSE;
3693 if(ib > 0 && (ATTRCMP(base, new)
3694 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3695 xdraws(buf, base, ox, y, ic, ib);
3696 ic = ib = 0;
3697 }
3698 if(ib == 0) {
3699 ox = x;
3700 base = new;
3701 }
3702
3703 sl = utf8decode(new.c, &unicodep, UTF_SIZ);
3704 memcpy(buf+ib, new.c, sl);
3705 ib += sl;
3706 ic += (new.mode & ATTR_WIDE)? 2 : 1;
3707 }
3708 if(ib > 0)
3709 xdraws(buf, base, ox, y, ic, ib);
3710 }
3711 xdrawcursor();
3712 }
3713
3714 void
3715 expose(XEvent *ev) {
3716 XExposeEvent *e = &ev->xexpose;
3717
3718 if(xw.state & WIN_REDRAW) {
3719 if(!e->count)
3720 xw.state &= ~WIN_REDRAW;
3721 }
3722 redraw();
3723 }
3724
3725 void
3726 visibility(XEvent *ev) {
3727 XVisibilityEvent *e = &ev->xvisibility;
3728
3729 if(e->state == VisibilityFullyObscured) {
3730 xw.state &= ~WIN_VISIBLE;
3731 } else if(!(xw.state & WIN_VISIBLE)) {
3732 /* need a full redraw for next Expose, not just a buf copy */
3733 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3734 }
3735 }
3736
3737 void
3738 unmap(XEvent *ev) {
3739 xw.state &= ~WIN_VISIBLE;
3740 }
3741
3742 void
3743 xsetpointermotion(int set) {
3744 MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
3745 XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
3746 }
3747
3748 void
3749 xseturgency(int add) {
3750 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3751
3752 MODBIT(h->flags, add, XUrgencyHint);
3753 XSetWMHints(xw.dpy, xw.win, h);
3754 XFree(h);
3755 }
3756
3757 void
3758 focus(XEvent *ev) {
3759 XFocusChangeEvent *e = &ev->xfocus;
3760
3761 if(e->mode == NotifyGrab)
3762 return;
3763
3764 if(ev->type == FocusIn) {
3765 XSetICFocus(xw.xic);
3766 xw.state |= WIN_FOCUSED;
3767 xseturgency(0);
3768 if(IS_SET(MODE_FOCUS))
3769 ttywrite("\033[I", 3);
3770 } else {
3771 XUnsetICFocus(xw.xic);
3772 xw.state &= ~WIN_FOCUSED;
3773 if(IS_SET(MODE_FOCUS))
3774 ttywrite("\033[O", 3);
3775 }
3776 }
3777
3778 bool
3779 match(uint mask, uint state) {
3780 return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
3781 }
3782
3783 void
3784 numlock(const Arg *dummy) {
3785 term.numlock ^= 1;
3786 }
3787
3788 char*
3789 kmap(KeySym k, uint state) {
3790 Key *kp;
3791 int i;
3792
3793 /* Check for mapped keys out of X11 function keys. */
3794 for(i = 0; i < LEN(mappedkeys); i++) {
3795 if(mappedkeys[i] == k)
3796 break;
3797 }
3798 if(i == LEN(mappedkeys)) {
3799 if((k & 0xFFFF) < 0xFD00)
3800 return NULL;
3801 }
3802
3803 for(kp = key; kp < key + LEN(key); kp++) {
3804 if(kp->k != k)
3805 continue;
3806
3807 if(!match(kp->mask, state))
3808 continue;
3809
3810 if(IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
3811 continue;
3812 if(term.numlock && kp->appkey == 2)
3813 continue;
3814
3815 if(IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
3816 continue;
3817
3818 if(IS_SET(MODE_CRLF) ? kp->crlf < 0 : kp->crlf > 0)
3819 continue;
3820
3821 return kp->s;
3822 }
3823
3824 return NULL;
3825 }
3826
3827 void
3828 kpress(XEvent *ev) {
3829 XKeyEvent *e = &ev->xkey;
3830 KeySym ksym;
3831 char buf[32], *customkey;
3832 int len;
3833 long c;
3834 Status status;
3835 Shortcut *bp;
3836
3837 if(IS_SET(MODE_KBDLOCK))
3838 return;
3839
3840 len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
3841 /* 1. shortcuts */
3842 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3843 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3844 bp->func(&(bp->arg));
3845 return;
3846 }
3847 }
3848
3849 /* 2. custom keys from config.h */
3850 if((customkey = kmap(ksym, e->state))) {
3851 ttysend(customkey, strlen(customkey));
3852 return;
3853 }
3854
3855 /* 3. composed string from input method */
3856 if(len == 0)
3857 return;
3858 if(len == 1 && e->state & Mod1Mask) {
3859 if(IS_SET(MODE_8BIT)) {
3860 if(*buf < 0177) {
3861 c = *buf | 0x80;
3862 len = utf8encode(c, buf, UTF_SIZ);
3863 }
3864 } else {
3865 buf[1] = buf[0];
3866 buf[0] = '\033';
3867 len = 2;
3868 }
3869 }
3870 ttysend(buf, len);
3871 }
3872
3873
3874 void
3875 cmessage(XEvent *e) {
3876 /*
3877 * See xembed specs
3878 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3879 */
3880 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3881 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3882 xw.state |= WIN_FOCUSED;
3883 xseturgency(0);
3884 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3885 xw.state &= ~WIN_FOCUSED;
3886 }
3887 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3888 /* Send SIGHUP to shell */
3889 kill(pid, SIGHUP);
3890 exit(EXIT_SUCCESS);
3891 }
3892 }
3893
3894 void
3895 cresize(int width, int height) {
3896 int col, row;
3897
3898 if(width != 0)
3899 xw.w = width;
3900 if(height != 0)
3901 xw.h = height;
3902
3903 col = (xw.w - 2 * borderpx) / xw.cw;
3904 row = (xw.h - 2 * borderpx) / xw.ch;
3905
3906 tresize(col, row);
3907 xresize(col, row);
3908 ttyresize();
3909 }
3910
3911 void
3912 resize(XEvent *e) {
3913 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3914 return;
3915
3916 cresize(e->xconfigure.width, e->xconfigure.height);
3917 }
3918
3919 void
3920 run(void) {
3921 XEvent ev;
3922 int w = xw.w, h = xw.h;
3923 fd_set rfd;
3924 int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3925 struct timespec drawtimeout, *tv = NULL, now, last, lastblink;
3926 long deltatime;
3927
3928 /* Waiting for window mapping */
3929 while(1) {
3930 XNextEvent(xw.dpy, &ev);
3931 if(XFilterEvent(&ev, None))
3932 continue;
3933 if(ev.type == ConfigureNotify) {
3934 w = ev.xconfigure.width;
3935 h = ev.xconfigure.height;
3936 } else if(ev.type == MapNotify) {
3937 break;
3938 }
3939 }
3940
3941 ttynew();
3942 cresize(w, h);
3943
3944 clock_gettime(CLOCK_MONOTONIC, &last);
3945 lastblink = last;
3946
3947 for(xev = actionfps;;) {
3948 FD_ZERO(&rfd);
3949 FD_SET(cmdfd, &rfd);
3950 FD_SET(xfd, &rfd);
3951
3952 if(pselect(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv, NULL) < 0) {
3953 if(errno == EINTR)
3954 continue;
3955 die("select failed: %s\n", strerror(errno));
3956 }
3957 if(FD_ISSET(cmdfd, &rfd)) {
3958 ttyread();
3959 if(blinktimeout) {
3960 blinkset = tattrset(ATTR_BLINK);
3961 if(!blinkset)
3962 MODBIT(term.mode, 0, MODE_BLINK);
3963 }
3964 }
3965
3966 if(FD_ISSET(xfd, &rfd))
3967 xev = actionfps;
3968
3969 clock_gettime(CLOCK_MONOTONIC, &now);
3970 drawtimeout.tv_sec = 0;
3971 drawtimeout.tv_nsec = (1000/xfps) * 1E6;
3972 tv = &drawtimeout;
3973
3974 dodraw = 0;
3975 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
3976 tsetdirtattr(ATTR_BLINK);
3977 term.mode ^= MODE_BLINK;
3978 lastblink = now;
3979 dodraw = 1;
3980 }
3981 deltatime = TIMEDIFF(now, last);
3982 if(deltatime > (xev? (1000/xfps) : (1000/actionfps))
3983 || deltatime < 0) {
3984 dodraw = 1;
3985 last = now;
3986 }
3987
3988 if(dodraw) {
3989 while(XPending(xw.dpy)) {
3990 XNextEvent(xw.dpy, &ev);
3991 if(XFilterEvent(&ev, None))
3992 continue;
3993 if(handler[ev.type])
3994 (handler[ev.type])(&ev);
3995 }
3996
3997 draw();
3998 XFlush(xw.dpy);
3999
4000 if(xev && !FD_ISSET(xfd, &rfd))
4001 xev--;
4002 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
4003 if(blinkset) {
4004 if(TIMEDIFF(now, lastblink) \
4005 > blinktimeout) {
4006 drawtimeout.tv_nsec = 1000;
4007 } else {
4008 drawtimeout.tv_nsec = (1E6 * \
4009 (blinktimeout - \
4010 TIMEDIFF(now,
4011 lastblink)));
4012 }
4013 drawtimeout.tv_sec = \
4014 drawtimeout.tv_nsec / 1E9;
4015 drawtimeout.tv_nsec %= (long)1E9;
4016 } else {
4017 tv = NULL;
4018 }
4019 }
4020 }
4021 }
4022 }
4023
4024 void
4025 usage(void) {
4026 die("%s " VERSION " (c) 2010-2015 st engineers\n" \
4027 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]\n"
4028 " [-i] [-t title] [-w windowid] [-e command ...]\n", argv0);
4029 }
4030
4031 int
4032 main(int argc, char *argv[]) {
4033 char *titles;
4034 uint cols = 80, rows = 24;
4035
4036 xw.l = xw.t = 0;
4037 xw.isfixed = False;
4038 xw.cursor = 0;
4039
4040 ARGBEGIN {
4041 case 'a':
4042 allowaltscreen = false;
4043 break;
4044 case 'c':
4045 opt_class = EARGF(usage());
4046 break;
4047 case 'e':
4048 /* eat all remaining arguments */
4049 if(argc > 1) {
4050 opt_cmd = &argv[1];
4051 if(argv[1] != NULL && opt_title == NULL) {
4052 titles = xstrdup(argv[1]);
4053 opt_title = basename(titles);
4054 }
4055 }
4056 goto run;
4057 case 'f':
4058 opt_font = EARGF(usage());
4059 break;
4060 case 'g':
4061 xw.gm = XParseGeometry(EARGF(usage()),
4062 &xw.l, &xw.t, &cols, &rows);
4063 break;
4064 case 'i':
4065 xw.isfixed = True;
4066 break;
4067 case 'o':
4068 opt_io = EARGF(usage());
4069 break;
4070 case 't':
4071 opt_title = EARGF(usage());
4072 break;
4073 case 'w':
4074 opt_embed = EARGF(usage());
4075 break;
4076 case 'v':
4077 default:
4078 usage();
4079 } ARGEND;
4080
4081 run:
4082 setlocale(LC_CTYPE, "");
4083 XSetLocaleModifiers("");
4084 tnew(cols? cols : 1, rows? rows : 1);
4085 xinit();
4086 selinit();
4087 run();
4088
4089 return 0;
4090 }
4091