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Merge branch 'master' of ssh://suckless.org/gitrepos/st
[st.git] / st.c
blob69b249162b84d95bca15e65f2886f806cc5ebe93
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 <fontconfig/fontconfig.h>
31 #include <wchar.h>
32
33 #include "arg.h"
34
35 char *argv0;
36
37 #define Glyph Glyph_
38 #define Font Font_
39 #define Draw XftDraw *
40 #define Colour XftColor
41 #define Colourmap Colormap
42 #define Rectangle XRectangle
43
44 #if defined(__linux)
45 #include <pty.h>
46 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
47 #include <util.h>
48 #elif defined(__FreeBSD__) || defined(__DragonFly__)
49 #include <libutil.h>
50 #endif
51
52
53 /* XEMBED messages */
54 #define XEMBED_FOCUS_IN 4
55 #define XEMBED_FOCUS_OUT 5
56
57 /* Arbitrary sizes */
58 #define UTF_SIZ 4
59 #define ESC_BUF_SIZ (128*UTF_SIZ)
60 #define ESC_ARG_SIZ 16
61 #define STR_BUF_SIZ ESC_BUF_SIZ
62 #define STR_ARG_SIZ ESC_ARG_SIZ
63 #define DRAW_BUF_SIZ 20*1024
64 #define XK_ANY_MOD UINT_MAX
65 #define XK_NO_MOD 0
66 #define XK_SWITCH_MOD (1<<13)
67
68 #define REDRAW_TIMEOUT (80*1000) /* 80 ms */
69
70 /* macros */
71 #define SERRNO strerror(errno)
72 #define MIN(a, b) ((a) < (b) ? (a) : (b))
73 #define MAX(a, b) ((a) < (b) ? (b) : (a))
74 #define LEN(a) (sizeof(a) / sizeof(a[0]))
75 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
76 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
77 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
78 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
79 #define IS_SET(flag) ((term.mode & (flag)) != 0)
80 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_usec-t2.tv_usec)/1000)
81 #define CEIL(x) (((x) != (int) (x)) ? (x) + 1 : (x))
82
83 #define TRUECOLOR(r,g,b) (1 << 24 | (r) << 16 | (g) << 8 | (b))
84 #define IS_TRUECOL(x) (1 << 24 & (x))
85 #define TRUERED(x) (((x) & 0xff0000) >> 8)
86 #define TRUEGREEN(x) (((x) & 0xff00))
87 #define TRUEBLUE(x) (((x) & 0xff) << 8)
88
89
90 #define VT102ID "\033[?6c"
91
92 enum glyph_attribute {
93 ATTR_NULL = 0,
94 ATTR_REVERSE = 1,
95 ATTR_UNDERLINE = 2,
96 ATTR_BOLD = 4,
97 ATTR_GFX = 8,
98 ATTR_ITALIC = 16,
99 ATTR_BLINK = 32,
100 ATTR_WRAP = 64,
101 ATTR_WIDE = 128,
102 ATTR_WDUMMY = 256,
103 };
104
105 enum cursor_movement {
106 CURSOR_SAVE,
107 CURSOR_LOAD
108 };
109
110 enum cursor_state {
111 CURSOR_DEFAULT = 0,
112 CURSOR_WRAPNEXT = 1,
113 CURSOR_ORIGIN = 2
114 };
115
116 enum term_mode {
117 MODE_WRAP = 1,
118 MODE_INSERT = 2,
119 MODE_APPKEYPAD = 4,
120 MODE_ALTSCREEN = 8,
121 MODE_CRLF = 16,
122 MODE_MOUSEBTN = 32,
123 MODE_MOUSEMOTION = 64,
124 MODE_REVERSE = 128,
125 MODE_KBDLOCK = 256,
126 MODE_HIDE = 512,
127 MODE_ECHO = 1024,
128 MODE_APPCURSOR = 2048,
129 MODE_MOUSESGR = 4096,
130 MODE_8BIT = 8192,
131 MODE_BLINK = 16384,
132 MODE_FBLINK = 32768,
133 MODE_FOCUS = 65536,
134 MODE_MOUSEX10 = 131072,
135 MODE_MOUSEMANY = 262144,
136 MODE_BRCKTPASTE = 524288,
137 MODE_PRINT = 1048576,
138 MODE_MOUSE = MODE_MOUSEBTN|MODE_MOUSEMOTION|MODE_MOUSEX10\
139 |MODE_MOUSEMANY,
140 };
141
142 enum charset {
143 CS_GRAPHIC0,
144 CS_GRAPHIC1,
145 CS_UK,
146 CS_USA,
147 CS_MULTI,
148 CS_GER,
149 CS_FIN
150 };
151
152 enum escape_state {
153 ESC_START = 1,
154 ESC_CSI = 2,
155 ESC_STR = 4, /* DSC, OSC, PM, APC */
156 ESC_ALTCHARSET = 8,
157 ESC_STR_END = 16, /* a final string was encountered */
158 ESC_TEST = 32, /* Enter in test mode */
159 };
160
161 enum window_state {
162 WIN_VISIBLE = 1,
163 WIN_REDRAW = 2,
164 WIN_FOCUSED = 4
165 };
166
167 enum selection_type {
168 SEL_REGULAR = 1,
169 SEL_RECTANGULAR = 2
170 };
171
172 enum selection_snap {
173 SNAP_WORD = 1,
174 SNAP_LINE = 2
175 };
176
177 typedef unsigned char uchar;
178 typedef unsigned int uint;
179 typedef unsigned long ulong;
180 typedef unsigned short ushort;
181
182 typedef struct {
183 char c[UTF_SIZ]; /* character code */
184 ushort mode; /* attribute flags */
185 uint32_t fg; /* foreground */
186 uint32_t bg; /* background */
187 } Glyph;
188
189 typedef Glyph *Line;
190
191 typedef struct {
192 Glyph attr; /* current char attributes */
193 int x;
194 int y;
195 char state;
196 } TCursor;
197
198 /* CSI Escape sequence structs */
199 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
200 typedef struct {
201 char buf[ESC_BUF_SIZ]; /* raw string */
202 int len; /* raw string length */
203 char priv;
204 int arg[ESC_ARG_SIZ];
205 int narg; /* nb of args */
206 char mode;
207 } CSIEscape;
208
209 /* STR Escape sequence structs */
210 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
211 typedef struct {
212 char type; /* ESC type ... */
213 char buf[STR_BUF_SIZ]; /* raw string */
214 int len; /* raw string length */
215 char *args[STR_ARG_SIZ];
216 int narg; /* nb of args */
217 } STREscape;
218
219 /* Internal representation of the screen */
220 typedef struct {
221 int row; /* nb row */
222 int col; /* nb col */
223 Line *line; /* screen */
224 Line *alt; /* alternate screen */
225 bool *dirty; /* dirtyness of lines */
226 TCursor c; /* cursor */
227 int top; /* top scroll limit */
228 int bot; /* bottom scroll limit */
229 int mode; /* terminal mode flags */
230 int esc; /* escape state flags */
231 char trantbl[4]; /* charset table translation */
232 int charset; /* current charset */
233 int icharset; /* selected charset for sequence */
234 bool numlock; /* lock numbers in keyboard */
235 bool *tabs;
236 } Term;
237
238 /* Purely graphic info */
239 typedef struct {
240 Display *dpy;
241 Colourmap cmap;
242 Window win;
243 Drawable buf;
244 Atom xembed, wmdeletewin, netwmname, netwmpid;
245 XIM xim;
246 XIC xic;
247 Draw draw;
248 Visual *vis;
249 XSetWindowAttributes attrs;
250 int scr;
251 bool isfixed; /* is fixed geometry? */
252 int fx, fy, fw, fh; /* fixed geometry */
253 int tw, th; /* tty width and height */
254 int w, h; /* window width and height */
255 int ch; /* char height */
256 int cw; /* char width */
257 char state; /* focus, redraw, visible */
258 } XWindow;
259
260 typedef struct {
261 uint b;
262 uint mask;
263 char *s;
264 } Mousekey;
265
266 typedef struct {
267 KeySym k;
268 uint mask;
269 char *s;
270 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
271 signed char appkey; /* application keypad */
272 signed char appcursor; /* application cursor */
273 signed char crlf; /* crlf mode */
274 } Key;
275
276 typedef struct {
277 int mode;
278 int type;
279 int snap;
280 /*
281 * Selection variables:
282 * nb – normalized coordinates of the beginning of the selection
283 * ne – normalized coordinates of the end of the selection
284 * ob – original coordinates of the beginning of the selection
285 * oe – original coordinates of the end of the selection
286 */
287 struct {
288 int x, y;
289 } nb, ne, ob, oe;
290
291 char *clip;
292 Atom xtarget;
293 bool alt;
294 struct timeval tclick1;
295 struct timeval tclick2;
296 } Selection;
297
298 typedef union {
299 int i;
300 unsigned int ui;
301 float f;
302 const void *v;
303 } Arg;
304
305 typedef struct {
306 unsigned int mod;
307 KeySym keysym;
308 void (*func)(const Arg *);
309 const Arg arg;
310 } Shortcut;
311
312 /* function definitions used in config.h */
313 static void clippaste(const Arg *);
314 static void numlock(const Arg *);
315 static void selpaste(const Arg *);
316 static void xzoom(const Arg *);
317 static void printsel(const Arg *);
318 static void printscreen(const Arg *) ;
319 static void toggleprinter(const Arg *);
320
321 /* Config.h for applying patches and the configuration. */
322 #include "config.h"
323
324 /* Font structure */
325 typedef struct {
326 int height;
327 int width;
328 int ascent;
329 int descent;
330 short lbearing;
331 short rbearing;
332 XftFont *match;
333 FcFontSet *set;
334 FcPattern *pattern;
335 } Font;
336
337 /* Drawing Context */
338 typedef struct {
339 Colour col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
340 Font font, bfont, ifont, ibfont;
341 GC gc;
342 } DC;
343
344 static void die(const char *, ...);
345 static void draw(void);
346 static void redraw(int);
347 static void drawregion(int, int, int, int);
348 static void execsh(void);
349 static void sigchld(int);
350 static void run(void);
351
352 static void csidump(void);
353 static void csihandle(void);
354 static void csiparse(void);
355 static void csireset(void);
356 static void strdump(void);
357 static void strhandle(void);
358 static void strparse(void);
359 static void strreset(void);
360
361 static int tattrset(int);
362 static void tprinter(char *s, size_t len);
363 static void tdumpsel(void);
364 static void tdumpline(int);
365 static void tdump(void);
366 static void tclearregion(int, int, int, int);
367 static void tcursor(int);
368 static void tdeletechar(int);
369 static void tdeleteline(int);
370 static void tinsertblank(int);
371 static void tinsertblankline(int);
372 static void tmoveto(int, int);
373 static void tmoveato(int x, int y);
374 static void tnew(int, int);
375 static void tnewline(int);
376 static void tputtab(bool);
377 static void tputc(char *, int);
378 static void treset(void);
379 static int tresize(int, int);
380 static void tscrollup(int, int);
381 static void tscrolldown(int, int);
382 static void tsetattr(int*, int);
383 static void tsetchar(char *, Glyph *, int, int);
384 static void tsetscroll(int, int);
385 static void tswapscreen(void);
386 static void tsetdirt(int, int);
387 static void tsetdirtattr(int);
388 static void tsetmode(bool, bool, int *, int);
389 static void tfulldirt(void);
390 static void techo(char *, int);
391 static int32_t tdefcolor(int *, int *, int);
392 static void tselcs(void);
393 static void tdeftran(char);
394 static inline bool match(uint, uint);
395 static void ttynew(void);
396 static void ttyread(void);
397 static void ttyresize(void);
398 static void ttysend(char *, size_t);
399 static void ttywrite(const char *, size_t);
400
401 static void xdraws(char *, Glyph, int, int, int, int);
402 static void xhints(void);
403 static void xclear(int, int, int, int);
404 static void xdrawcursor(void);
405 static void xinit(void);
406 static void xloadcols(void);
407 static int xsetcolorname(int, const char *);
408 static int xloadfont(Font *, FcPattern *);
409 static void xloadfonts(char *, double);
410 static int xloadfontset(Font *);
411 static void xsettitle(char *);
412 static void xresettitle(void);
413 static void xsetpointermotion(int);
414 static void xseturgency(int);
415 static void xsetsel(char*);
416 static void xtermclear(int, int, int, int);
417 static void xunloadfont(Font *f);
418 static void xunloadfonts(void);
419 static void xresize(int, int);
420
421 static void expose(XEvent *);
422 static void visibility(XEvent *);
423 static void unmap(XEvent *);
424 static char *kmap(KeySym, uint);
425 static void kpress(XEvent *);
426 static void cmessage(XEvent *);
427 static void cresize(int, int);
428 static void resize(XEvent *);
429 static void focus(XEvent *);
430 static void brelease(XEvent *);
431 static void bpress(XEvent *);
432 static void bmotion(XEvent *);
433 static void selnotify(XEvent *);
434 static void selclear(XEvent *);
435 static void selrequest(XEvent *);
436
437 static void selinit(void);
438 static void selsort(void);
439 static inline bool selected(int, int);
440 static char *getsel(void);
441 static void selcopy(void);
442 static void selscroll(int, int);
443 static void selsnap(int, int *, int *, int);
444
445 static int utf8decode(char *, long *);
446 static int utf8encode(long *, char *);
447 static int utf8size(char *);
448 static int isfullutf8(char *, int);
449
450 static ssize_t xwrite(int, char *, size_t);
451 static void *xmalloc(size_t);
452 static void *xrealloc(void *, size_t);
453 static char *xstrdup(char *s);
454
455 static void (*handler[LASTEvent])(XEvent *) = {
456 [KeyPress] = kpress,
457 [ClientMessage] = cmessage,
458 [ConfigureNotify] = resize,
459 [VisibilityNotify] = visibility,
460 [UnmapNotify] = unmap,
461 [Expose] = expose,
462 [FocusIn] = focus,
463 [FocusOut] = focus,
464 [MotionNotify] = bmotion,
465 [ButtonPress] = bpress,
466 [ButtonRelease] = brelease,
467 [SelectionClear] = selclear,
468 [SelectionNotify] = selnotify,
469 [SelectionRequest] = selrequest,
470 };
471
472 /* Globals */
473 static DC dc;
474 static XWindow xw;
475 static Term term;
476 static CSIEscape csiescseq;
477 static STREscape strescseq;
478 static int cmdfd;
479 static pid_t pid;
480 static Selection sel;
481 static int iofd = STDOUT_FILENO;
482 static char **opt_cmd = NULL;
483 static char *opt_io = NULL;
484 static char *opt_title = NULL;
485 static char *opt_embed = NULL;
486 static char *opt_class = NULL;
487 static char *opt_font = NULL;
488 static int oldbutton = 3; /* button event on startup: 3 = release */
489
490 static char *usedfont = NULL;
491 static double usedfontsize = 0;
492
493 /* Font Ring Cache */
494 enum {
495 FRC_NORMAL,
496 FRC_ITALIC,
497 FRC_BOLD,
498 FRC_ITALICBOLD
499 };
500
501 typedef struct {
502 XftFont *font;
503 int flags;
504 } Fontcache;
505
506 /* Fontcache is an array now. A new font will be appended to the array. */
507 static Fontcache frc[16];
508 static int frclen = 0;
509
510 ssize_t
511 xwrite(int fd, char *s, size_t len) {
512 size_t aux = len;
513
514 while(len > 0) {
515 ssize_t r = write(fd, s, len);
516 if(r < 0)
517 return r;
518 len -= r;
519 s += r;
520 }
521 return aux;
522 }
523
524 void *
525 xmalloc(size_t len) {
526 void *p = malloc(len);
527
528 if(!p)
529 die("Out of memory\n");
530
531 return p;
532 }
533
534 void *
535 xrealloc(void *p, size_t len) {
536 if((p = realloc(p, len)) == NULL)
537 die("Out of memory\n");
538
539 return p;
540 }
541
542 char *
543 xstrdup(char *s) {
544 char *p = strdup(s);
545
546 if (!p)
547 die("Out of memory\n");
548
549 return p;
550 }
551
552 int
553 utf8decode(char *s, long *u) {
554 uchar c;
555 int i, n, rtn;
556
557 rtn = 1;
558 c = *s;
559 if(~c & 0x80) { /* 0xxxxxxx */
560 *u = c;
561 return rtn;
562 } else if((c & 0xE0) == 0xC0) { /* 110xxxxx */
563 *u = c & 0x1F;
564 n = 1;
565 } else if((c & 0xF0) == 0xE0) { /* 1110xxxx */
566 *u = c & 0x0F;
567 n = 2;
568 } else if((c & 0xF8) == 0xF0) { /* 11110xxx */
569 *u = c & 0x07;
570 n = 3;
571 } else {
572 goto invalid;
573 }
574
575 for(i = n, ++s; i > 0; --i, ++rtn, ++s) {
576 c = *s;
577 if((c & 0xC0) != 0x80) /* 10xxxxxx */
578 goto invalid;
579 *u <<= 6;
580 *u |= c & 0x3F;
581 }
582
583 if((n == 1 && *u < 0x80) ||
584 (n == 2 && *u < 0x800) ||
585 (n == 3 && *u < 0x10000) ||
586 (*u >= 0xD800 && *u <= 0xDFFF)) {
587 goto invalid;
588 }
589
590 return rtn;
591 invalid:
592 *u = 0xFFFD;
593
594 return rtn;
595 }
596
597 int
598 utf8encode(long *u, char *s) {
599 uchar *sp;
600 ulong uc;
601 int i, n;
602
603 sp = (uchar *)s;
604 uc = *u;
605 if(uc < 0x80) {
606 *sp = uc; /* 0xxxxxxx */
607 return 1;
608 } else if(*u < 0x800) {
609 *sp = (uc >> 6) | 0xC0; /* 110xxxxx */
610 n = 1;
611 } else if(uc < 0x10000) {
612 *sp = (uc >> 12) | 0xE0; /* 1110xxxx */
613 n = 2;
614 } else if(uc <= 0x10FFFF) {
615 *sp = (uc >> 18) | 0xF0; /* 11110xxx */
616 n = 3;
617 } else {
618 goto invalid;
619 }
620
621 for(i=n,++sp; i>0; --i,++sp)
622 *sp = ((uc >> 6*(i-1)) & 0x3F) | 0x80; /* 10xxxxxx */
623
624 return n+1;
625 invalid:
626 /* U+FFFD */
627 *s++ = '\xEF';
628 *s++ = '\xBF';
629 *s = '\xBD';
630
631 return 3;
632 }
633
634 /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
635 UTF-8 otherwise return 0 */
636 int
637 isfullutf8(char *s, int b) {
638 uchar *c1, *c2, *c3;
639
640 c1 = (uchar *)s;
641 c2 = (uchar *)++s;
642 c3 = (uchar *)++s;
643 if(b < 1) {
644 return 0;
645 } else if((*c1 & 0xE0) == 0xC0 && b == 1) {
646 return 0;
647 } else if((*c1 & 0xF0) == 0xE0 &&
648 ((b == 1) ||
649 ((b == 2) && (*c2 & 0xC0) == 0x80))) {
650 return 0;
651 } else if((*c1 & 0xF8) == 0xF0 &&
652 ((b == 1) ||
653 ((b == 2) && (*c2 & 0xC0) == 0x80) ||
654 ((b == 3) && (*c2 & 0xC0) == 0x80 && (*c3 & 0xC0) == 0x80))) {
655 return 0;
656 } else {
657 return 1;
658 }
659 }
660
661 int
662 utf8size(char *s) {
663 uchar c = *s;
664
665 if(~c & 0x80) {
666 return 1;
667 } else if((c & 0xE0) == 0xC0) {
668 return 2;
669 } else if((c & 0xF0) == 0xE0) {
670 return 3;
671 } else {
672 return 4;
673 }
674 }
675
676 static void
677 selinit(void) {
678 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
679 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
680 sel.mode = 0;
681 sel.ob.x = -1;
682 sel.clip = NULL;
683 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
684 if(sel.xtarget == None)
685 sel.xtarget = XA_STRING;
686 }
687
688 static int
689 x2col(int x) {
690 x -= borderpx;
691 x /= xw.cw;
692
693 return LIMIT(x, 0, term.col-1);
694 }
695
696 static int
697 y2row(int y) {
698 y -= borderpx;
699 y /= xw.ch;
700
701 return LIMIT(y, 0, term.row-1);
702 }
703
704 static void
705 selsort(void) {
706 if(sel.ob.y == sel.oe.y) {
707 sel.nb.x = MIN(sel.ob.x, sel.oe.x);
708 sel.ne.x = MAX(sel.ob.x, sel.oe.x);
709 } else {
710 sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
711 sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
712 }
713 sel.nb.y = MIN(sel.ob.y, sel.oe.y);
714 sel.ne.y = MAX(sel.ob.y, sel.oe.y);
715 }
716
717 static inline bool
718 selected(int x, int y) {
719 if(sel.ne.y == y && sel.nb.y == y)
720 return BETWEEN(x, sel.nb.x, sel.ne.x);
721
722 if(sel.type == SEL_RECTANGULAR) {
723 return ((sel.nb.y <= y && y <= sel.ne.y)
724 && (sel.nb.x <= x && x <= sel.ne.x));
725 }
726
727 return ((sel.nb.y < y && y < sel.ne.y)
728 || (y == sel.ne.y && x <= sel.ne.x))
729 || (y == sel.nb.y && x >= sel.nb.x
730 && (x <= sel.ne.x || sel.nb.y != sel.ne.y));
731 }
732
733 void
734 selsnap(int mode, int *x, int *y, int direction) {
735 int i;
736
737 switch(mode) {
738 case SNAP_WORD:
739 /*
740 * Snap around if the word wraps around at the end or
741 * beginning of a line.
742 */
743 for(;;) {
744 if(direction < 0 && *x <= 0) {
745 if(*y > 0 && term.line[*y - 1][term.col-1].mode
746 & ATTR_WRAP) {
747 *y -= 1;
748 *x = term.col-1;
749 } else {
750 break;
751 }
752 }
753 if(direction > 0 && *x >= term.col-1) {
754 if(*y < term.row-1 && term.line[*y][*x].mode
755 & ATTR_WRAP) {
756 *y += 1;
757 *x = 0;
758 } else {
759 break;
760 }
761 }
762
763 if(term.line[*y][*x+direction].mode & ATTR_WDUMMY) {
764 *x += direction;
765 continue;
766 }
767
768 if(strchr(worddelimiters,
769 term.line[*y][*x+direction].c[0])) {
770 break;
771 }
772
773 *x += direction;
774 }
775 break;
776 case SNAP_LINE:
777 /*
778 * Snap around if the the previous line or the current one
779 * has set ATTR_WRAP at its end. Then the whole next or
780 * previous line will be selected.
781 */
782 *x = (direction < 0) ? 0 : term.col - 1;
783 if(direction < 0 && *y > 0) {
784 for(; *y > 0; *y += direction) {
785 if(!(term.line[*y-1][term.col-1].mode
786 & ATTR_WRAP)) {
787 break;
788 }
789 }
790 } else if(direction > 0 && *y < term.row-1) {
791 for(; *y < term.row; *y += direction) {
792 if(!(term.line[*y][term.col-1].mode
793 & ATTR_WRAP)) {
794 break;
795 }
796 }
797 }
798 break;
799 default:
800 /*
801 * Select the whole line when the end of line is reached.
802 */
803 if(direction > 0) {
804 i = term.col;
805 while(--i > 0 && term.line[*y][i].c[0] == ' ')
806 /* nothing */;
807 if(i > 0 && i < *x)
808 *x = term.col - 1;
809 }
810 break;
811 }
812 }
813
814 void
815 getbuttoninfo(XEvent *e) {
816 int type;
817 uint state = e->xbutton.state &~Button1Mask;
818
819 sel.alt = IS_SET(MODE_ALTSCREEN);
820
821 sel.oe.x = x2col(e->xbutton.x);
822 sel.oe.y = y2row(e->xbutton.y);
823
824 if(sel.ob.y < sel.oe.y
825 || (sel.ob.y == sel.oe.y && sel.ob.x < sel.oe.x)) {
826 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
827 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
828 } else {
829 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, -1);
830 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, +1);
831 }
832 selsort();
833
834 sel.type = SEL_REGULAR;
835 for(type = 1; type < LEN(selmasks); ++type) {
836 if(match(selmasks[type], state)) {
837 sel.type = type;
838 break;
839 }
840 }
841 }
842
843 void
844 mousereport(XEvent *e) {
845 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
846 button = e->xbutton.button, state = e->xbutton.state,
847 len;
848 char buf[40];
849 static int ox, oy;
850
851 /* from urxvt */
852 if(e->xbutton.type == MotionNotify) {
853 if(x == ox && y == oy)
854 return;
855 if(!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
856 return;
857 /* MOUSE_MOTION: no reporting if no button is pressed */
858 if(IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
859 return;
860
861 button = oldbutton + 32;
862 ox = x;
863 oy = y;
864 } else {
865 if(!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
866 button = 3;
867 } else {
868 button -= Button1;
869 if(button >= 3)
870 button += 64 - 3;
871 }
872 if(e->xbutton.type == ButtonPress) {
873 oldbutton = button;
874 ox = x;
875 oy = y;
876 } else if(e->xbutton.type == ButtonRelease) {
877 oldbutton = 3;
878 /* MODE_MOUSEX10: no button release reporting */
879 if(IS_SET(MODE_MOUSEX10))
880 return;
881 }
882 }
883
884 if(!IS_SET(MODE_MOUSEX10)) {
885 button += (state & ShiftMask ? 4 : 0)
886 + (state & Mod4Mask ? 8 : 0)
887 + (state & ControlMask ? 16 : 0);
888 }
889
890 len = 0;
891 if(IS_SET(MODE_MOUSESGR)) {
892 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
893 button, x+1, y+1,
894 e->xbutton.type == ButtonRelease ? 'm' : 'M');
895 } else if(x < 223 && y < 223) {
896 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
897 32+button, 32+x+1, 32+y+1);
898 } else {
899 return;
900 }
901
902 ttywrite(buf, len);
903 }
904
905 void
906 bpress(XEvent *e) {
907 struct timeval now;
908 Mousekey *mk;
909
910 if(IS_SET(MODE_MOUSE)) {
911 mousereport(e);
912 return;
913 }
914
915 for(mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
916 if(e->xbutton.button == mk->b
917 && match(mk->mask, e->xbutton.state)) {
918 ttysend(mk->s, strlen(mk->s));
919 return;
920 }
921 }
922
923 if(e->xbutton.button == Button1) {
924 gettimeofday(&now, NULL);
925
926 /* Clear previous selection, logically and visually. */
927 selclear(NULL);
928 sel.mode = 1;
929 sel.type = SEL_REGULAR;
930 sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
931 sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
932
933 /*
934 * If the user clicks below predefined timeouts specific
935 * snapping behaviour is exposed.
936 */
937 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
938 sel.snap = SNAP_LINE;
939 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
940 sel.snap = SNAP_WORD;
941 } else {
942 sel.snap = 0;
943 }
944 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
945 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
946 selsort();
947
948 /*
949 * Draw selection, unless it's regular and we don't want to
950 * make clicks visible
951 */
952 if(sel.snap != 0) {
953 sel.mode++;
954 tsetdirt(sel.nb.y, sel.ne.y);
955 }
956 sel.tclick2 = sel.tclick1;
957 sel.tclick1 = now;
958 }
959 }
960
961 char *
962 getsel(void) {
963 char *str, *ptr;
964 int x, y, bufsize, size, i, ex;
965 Glyph *gp, *last;
966
967 if(sel.ob.x == -1) {
968 str = NULL;
969 } else {
970 bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
971 ptr = str = xmalloc(bufsize);
972
973 /* append every set & selected glyph to the selection */
974 for(y = sel.nb.y; y < sel.ne.y + 1; y++) {
975 gp = &term.line[y][0];
976 last = &gp[term.col-1];
977
978 while(last >= gp && !(selected(last - gp, y) &&
979 strcmp(last->c, " ") != 0)) {
980 --last;
981 }
982
983 for(x = 0; gp <= last; x++, ++gp) {
984 if(!selected(x, y) || (gp->mode & ATTR_WDUMMY))
985 continue;
986
987 size = utf8size(gp->c);
988 memcpy(ptr, gp->c, size);
989 ptr += size;
990 }
991
992 /*
993 * Copy and pasting of line endings is inconsistent
994 * in the inconsistent terminal and GUI world.
995 * The best solution seems like to produce '\n' when
996 * something is copied from st and convert '\n' to
997 * '\r', when something to be pasted is received by
998 * st.
999 * FIXME: Fix the computer world.
1000 */
1001 if(y < sel.ne.y && x > 0 && !((gp-1)->mode & ATTR_WRAP))
1002 *ptr++ = '\n';
1003
1004 /*
1005 * If the last selected line expands in the selection
1006 * after the visible text '\n' is appended.
1007 */
1008 if(y == sel.ne.y) {
1009 i = term.col;
1010 while(--i > 0 && term.line[y][i].c[0] == ' ')
1011 /* nothing */;
1012 ex = sel.ne.x;
1013 if(sel.nb.y == sel.ne.y && sel.ne.x < sel.nb.x)
1014 ex = sel.nb.x;
1015 if(i < ex)
1016 *ptr++ = '\n';
1017 }
1018 }
1019 *ptr = 0;
1020 }
1021 return str;
1022 }
1023
1024 void
1025 selcopy(void) {
1026 xsetsel(getsel());
1027 }
1028
1029 void
1030 selnotify(XEvent *e) {
1031 ulong nitems, ofs, rem;
1032 int format;
1033 uchar *data, *last, *repl;
1034 Atom type;
1035
1036 ofs = 0;
1037 do {
1038 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
1039 False, AnyPropertyType, &type, &format,
1040 &nitems, &rem, &data)) {
1041 fprintf(stderr, "Clipboard allocation failed\n");
1042 return;
1043 }
1044
1045 /*
1046 * As seen in selcopy:
1047 * Line endings are inconsistent in the terminal and GUI world
1048 * copy and pasting. When receiving some selection data,
1049 * replace all '\n' with '\r'.
1050 * FIXME: Fix the computer world.
1051 */
1052 repl = data;
1053 last = data + nitems * format / 8;
1054 while((repl = memchr(repl, '\n', last - repl))) {
1055 *repl++ = '\r';
1056 }
1057
1058 if(IS_SET(MODE_BRCKTPASTE))
1059 ttywrite("\033[200~", 6);
1060 ttysend((char *)data, nitems * format / 8);
1061 if(IS_SET(MODE_BRCKTPASTE))
1062 ttywrite("\033[201~", 6);
1063 XFree(data);
1064 /* number of 32-bit chunks returned */
1065 ofs += nitems * format / 32;
1066 } while(rem > 0);
1067 }
1068
1069 void
1070 selpaste(const Arg *dummy) {
1071 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
1072 xw.win, CurrentTime);
1073 }
1074
1075 void
1076 clippaste(const Arg *dummy) {
1077 Atom clipboard;
1078
1079 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1080 XConvertSelection(xw.dpy, clipboard, sel.xtarget, XA_PRIMARY,
1081 xw.win, CurrentTime);
1082 }
1083
1084 void
1085 selclear(XEvent *e) {
1086 if(sel.ob.x == -1)
1087 return;
1088 sel.ob.x = -1;
1089 tsetdirt(sel.nb.y, sel.ne.y);
1090 }
1091
1092 void
1093 selrequest(XEvent *e) {
1094 XSelectionRequestEvent *xsre;
1095 XSelectionEvent xev;
1096 Atom xa_targets, string;
1097
1098 xsre = (XSelectionRequestEvent *) e;
1099 xev.type = SelectionNotify;
1100 xev.requestor = xsre->requestor;
1101 xev.selection = xsre->selection;
1102 xev.target = xsre->target;
1103 xev.time = xsre->time;
1104 /* reject */
1105 xev.property = None;
1106
1107 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
1108 if(xsre->target == xa_targets) {
1109 /* respond with the supported type */
1110 string = sel.xtarget;
1111 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1112 XA_ATOM, 32, PropModeReplace,
1113 (uchar *) &string, 1);
1114 xev.property = xsre->property;
1115 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
1116 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1117 xsre->target, 8, PropModeReplace,
1118 (uchar *) sel.clip, strlen(sel.clip));
1119 xev.property = xsre->property;
1120 }
1121
1122 /* all done, send a notification to the listener */
1123 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
1124 fprintf(stderr, "Error sending SelectionNotify event\n");
1125 }
1126
1127 void
1128 xsetsel(char *str) {
1129 /* register the selection for both the clipboard and the primary */
1130 Atom clipboard;
1131
1132 free(sel.clip);
1133 sel.clip = str;
1134
1135 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
1136
1137 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1138 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
1139 }
1140
1141 void
1142 brelease(XEvent *e) {
1143 if(IS_SET(MODE_MOUSE)) {
1144 mousereport(e);
1145 return;
1146 }
1147
1148 if(e->xbutton.button == Button2) {
1149 selpaste(NULL);
1150 } else if(e->xbutton.button == Button1) {
1151 if(sel.mode < 2) {
1152 selclear(NULL);
1153 } else {
1154 getbuttoninfo(e);
1155 selcopy();
1156 }
1157 sel.mode = 0;
1158 tsetdirt(sel.nb.y, sel.ne.y);
1159 }
1160 }
1161
1162 void
1163 bmotion(XEvent *e) {
1164 int oldey, oldex, oldsby, oldsey;
1165
1166 if(IS_SET(MODE_MOUSE)) {
1167 mousereport(e);
1168 return;
1169 }
1170
1171 if(!sel.mode)
1172 return;
1173
1174 sel.mode++;
1175 oldey = sel.oe.y;
1176 oldex = sel.oe.x;
1177 oldsby = sel.nb.y;
1178 oldsey = sel.ne.y;
1179 getbuttoninfo(e);
1180
1181 if(oldey != sel.oe.y || oldex != sel.oe.x)
1182 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
1183 }
1184
1185 void
1186 die(const char *errstr, ...) {
1187 va_list ap;
1188
1189 va_start(ap, errstr);
1190 vfprintf(stderr, errstr, ap);
1191 va_end(ap);
1192 exit(EXIT_FAILURE);
1193 }
1194
1195 void
1196 execsh(void) {
1197 char **args;
1198 char *envshell = getenv("SHELL");
1199 const struct passwd *pass = getpwuid(getuid());
1200 char buf[sizeof(long) * 8 + 1];
1201
1202 unsetenv("COLUMNS");
1203 unsetenv("LINES");
1204 unsetenv("TERMCAP");
1205
1206 if(pass) {
1207 setenv("LOGNAME", pass->pw_name, 1);
1208 setenv("USER", pass->pw_name, 1);
1209 setenv("SHELL", pass->pw_shell, 0);
1210 setenv("HOME", pass->pw_dir, 0);
1211 }
1212
1213 snprintf(buf, sizeof(buf), "%lu", xw.win);
1214 setenv("WINDOWID", buf, 1);
1215
1216 signal(SIGCHLD, SIG_DFL);
1217 signal(SIGHUP, SIG_DFL);
1218 signal(SIGINT, SIG_DFL);
1219 signal(SIGQUIT, SIG_DFL);
1220 signal(SIGTERM, SIG_DFL);
1221 signal(SIGALRM, SIG_DFL);
1222
1223 DEFAULT(envshell, shell);
1224 setenv("TERM", termname, 1);
1225 args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
1226 execvp(args[0], args);
1227 exit(EXIT_FAILURE);
1228 }
1229
1230 void
1231 sigchld(int a) {
1232 int stat = 0;
1233
1234 if(waitpid(pid, &stat, 0) < 0)
1235 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
1236
1237 if(WIFEXITED(stat)) {
1238 exit(WEXITSTATUS(stat));
1239 } else {
1240 exit(EXIT_FAILURE);
1241 }
1242 }
1243
1244 void
1245 ttynew(void) {
1246 int m, s;
1247 struct winsize w = {term.row, term.col, 0, 0};
1248
1249 /* seems to work fine on linux, openbsd and freebsd */
1250 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1251 die("openpty failed: %s\n", SERRNO);
1252
1253 switch(pid = fork()) {
1254 case -1:
1255 die("fork failed\n");
1256 break;
1257 case 0:
1258 setsid(); /* create a new process group */
1259 dup2(s, STDIN_FILENO);
1260 dup2(s, STDOUT_FILENO);
1261 dup2(s, STDERR_FILENO);
1262 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1263 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
1264 close(s);
1265 close(m);
1266 execsh();
1267 break;
1268 default:
1269 close(s);
1270 cmdfd = m;
1271 signal(SIGCHLD, sigchld);
1272 if(opt_io) {
1273 term.mode |= MODE_PRINT;
1274 iofd = (!strcmp(opt_io, "-")) ?
1275 STDOUT_FILENO :
1276 open(opt_io, O_WRONLY | O_CREAT, 0666);
1277 if(iofd < 0) {
1278 fprintf(stderr, "Error opening %s:%s\n",
1279 opt_io, strerror(errno));
1280 }
1281 }
1282 }
1283 }
1284
1285 void
1286 dump(char c) {
1287 static int col;
1288
1289 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
1290 if(++col % 10 == 0)
1291 fprintf(stderr, "\n");
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 utf8c;
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", SERRNO);
1307
1308 /* process every complete utf8 char */
1309 buflen += ret;
1310 ptr = buf;
1311 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
1312 charsize = utf8decode(ptr, &utf8c);
1313 utf8encode(&utf8c, s);
1314 tputc(s, charsize);
1315 ptr += charsize;
1316 buflen -= charsize;
1317 }
1318
1319 /* keep any uncomplete utf8 char for the next call */
1320 memmove(buf, ptr, buflen);
1321 }
1322
1323 void
1324 ttywrite(const char *s, size_t n) {
1325 if(write(cmdfd, s, n) == -1)
1326 die("write error on tty: %s\n", SERRNO);
1327 }
1328
1329 void
1330 ttysend(char *s, size_t n) {
1331 ttywrite(s, n);
1332 if(IS_SET(MODE_ECHO))
1333 techo(s, n);
1334 }
1335
1336 void
1337 ttyresize(void) {
1338 struct winsize w;
1339
1340 w.ws_row = term.row;
1341 w.ws_col = term.col;
1342 w.ws_xpixel = xw.tw;
1343 w.ws_ypixel = xw.th;
1344 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1345 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
1346 }
1347
1348 int
1349 tattrset(int attr) {
1350 int i, j;
1351
1352 for(i = 0; i < term.row-1; i++) {
1353 for(j = 0; j < term.col-1; j++) {
1354 if(term.line[i][j].mode & attr)
1355 return 1;
1356 }
1357 }
1358
1359 return 0;
1360 }
1361
1362 void
1363 tsetdirt(int top, int bot) {
1364 int i;
1365
1366 LIMIT(top, 0, term.row-1);
1367 LIMIT(bot, 0, term.row-1);
1368
1369 for(i = top; i <= bot; i++)
1370 term.dirty[i] = 1;
1371 }
1372
1373 void
1374 tsetdirtattr(int attr) {
1375 int i, j;
1376
1377 for(i = 0; i < term.row-1; i++) {
1378 for(j = 0; j < term.col-1; j++) {
1379 if(term.line[i][j].mode & attr) {
1380 tsetdirt(i, i);
1381 break;
1382 }
1383 }
1384 }
1385 }
1386
1387 void
1388 tfulldirt(void) {
1389 tsetdirt(0, term.row-1);
1390 }
1391
1392 void
1393 tcursor(int mode) {
1394 static TCursor c[2];
1395 bool alt = IS_SET(MODE_ALTSCREEN);
1396
1397 if(mode == CURSOR_SAVE) {
1398 c[alt] = term.c;
1399 } else if(mode == CURSOR_LOAD) {
1400 term.c = c[alt];
1401 tmoveto(c[alt].x, c[alt].y);
1402 }
1403 }
1404
1405 void
1406 treset(void) {
1407 uint i;
1408
1409 term.c = (TCursor){{
1410 .mode = ATTR_NULL,
1411 .fg = defaultfg,
1412 .bg = defaultbg
1413 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1414
1415 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1416 for(i = tabspaces; i < term.col; i += tabspaces)
1417 term.tabs[i] = 1;
1418 term.top = 0;
1419 term.bot = term.row - 1;
1420 term.mode = MODE_WRAP;
1421 memset(term.trantbl, sizeof(term.trantbl), CS_USA);
1422 term.charset = 0;
1423
1424 tclearregion(0, 0, term.col-1, term.row-1);
1425 tmoveto(0, 0);
1426 tcursor(CURSOR_SAVE);
1427 }
1428
1429 void
1430 tnew(int col, int row) {
1431 term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } };
1432 tresize(col, row);
1433 term.numlock = 1;
1434
1435 treset();
1436 }
1437
1438 void
1439 tswapscreen(void) {
1440 Line *tmp = term.line;
1441
1442 term.line = term.alt;
1443 term.alt = tmp;
1444 term.mode ^= MODE_ALTSCREEN;
1445 tfulldirt();
1446 }
1447
1448 void
1449 tscrolldown(int orig, int n) {
1450 int i;
1451 Line temp;
1452
1453 LIMIT(n, 0, term.bot-orig+1);
1454
1455 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1456
1457 for(i = term.bot; i >= orig+n; i--) {
1458 temp = term.line[i];
1459 term.line[i] = term.line[i-n];
1460 term.line[i-n] = temp;
1461
1462 term.dirty[i] = 1;
1463 term.dirty[i-n] = 1;
1464 }
1465
1466 selscroll(orig, n);
1467 }
1468
1469 void
1470 tscrollup(int orig, int n) {
1471 int i;
1472 Line temp;
1473 LIMIT(n, 0, term.bot-orig+1);
1474
1475 tclearregion(0, orig, term.col-1, orig+n-1);
1476
1477 for(i = orig; i <= term.bot-n; i++) {
1478 temp = term.line[i];
1479 term.line[i] = term.line[i+n];
1480 term.line[i+n] = temp;
1481
1482 term.dirty[i] = 1;
1483 term.dirty[i+n] = 1;
1484 }
1485
1486 selscroll(orig, -n);
1487 }
1488
1489 void
1490 selscroll(int orig, int n) {
1491 if(sel.ob.x == -1)
1492 return;
1493
1494 if(BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
1495 if((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
1496 selclear(NULL);
1497 return;
1498 }
1499 if(sel.type == SEL_RECTANGULAR) {
1500 if(sel.ob.y < term.top)
1501 sel.ob.y = term.top;
1502 if(sel.oe.y > term.bot)
1503 sel.oe.y = term.bot;
1504 } else {
1505 if(sel.ob.y < term.top) {
1506 sel.ob.y = term.top;
1507 sel.ob.x = 0;
1508 }
1509 if(sel.oe.y > term.bot) {
1510 sel.oe.y = term.bot;
1511 sel.oe.x = term.col;
1512 }
1513 }
1514 selsort();
1515 }
1516 }
1517
1518 void
1519 tnewline(int first_col) {
1520 int y = term.c.y;
1521
1522 if(y == term.bot) {
1523 tscrollup(term.top, 1);
1524 } else {
1525 y++;
1526 }
1527 tmoveto(first_col ? 0 : term.c.x, y);
1528 }
1529
1530 void
1531 csiparse(void) {
1532 char *p = csiescseq.buf, *np;
1533 long int v;
1534
1535 csiescseq.narg = 0;
1536 if(*p == '?') {
1537 csiescseq.priv = 1;
1538 p++;
1539 }
1540
1541 csiescseq.buf[csiescseq.len] = '\0';
1542 while(p < csiescseq.buf+csiescseq.len) {
1543 np = NULL;
1544 v = strtol(p, &np, 10);
1545 if(np == p)
1546 v = 0;
1547 if(v == LONG_MAX || v == LONG_MIN)
1548 v = -1;
1549 csiescseq.arg[csiescseq.narg++] = v;
1550 p = np;
1551 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1552 break;
1553 p++;
1554 }
1555 csiescseq.mode = *p;
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(attr->mode & ATTR_GFX) {
1599 if(c[0] >= 0x41 && c[0] <= 0x7e
1600 && vt100_0[c[0] - 0x41]) {
1601 c = vt100_0[c[0] - 0x41];
1602 }
1603 }
1604
1605 if(term.line[y][x].mode & ATTR_WIDE) {
1606 if(x+1 < term.col) {
1607 term.line[y][x+1].c[0] = ' ';
1608 term.line[y][x+1].mode &= ~ATTR_WDUMMY;
1609 }
1610 } else if(term.line[y][x].mode & ATTR_WDUMMY) {
1611 term.line[y][x-1].c[0] = ' ';
1612 term.line[y][x-1].mode &= ~ATTR_WIDE;
1613 }
1614
1615 term.dirty[y] = 1;
1616 term.line[y][x] = *attr;
1617 memcpy(term.line[y][x].c, c, UTF_SIZ);
1618 }
1619
1620 void
1621 tclearregion(int x1, int y1, int x2, int y2) {
1622 int x, y, temp;
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 if(selected(x, y))
1638 selclear(NULL);
1639 term.line[y][x] = term.c.attr;
1640 memcpy(term.line[y][x].c, " ", 2);
1641 }
1642 }
1643 }
1644
1645 void
1646 tdeletechar(int n) {
1647 int src = term.c.x + n;
1648 int dst = term.c.x;
1649 int size = term.col - src;
1650
1651 term.dirty[term.c.y] = 1;
1652
1653 if(src >= term.col) {
1654 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1655 return;
1656 }
1657
1658 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1659 size * sizeof(Glyph));
1660 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1661 }
1662
1663 void
1664 tinsertblank(int n) {
1665 int src = term.c.x;
1666 int dst = src + n;
1667 int size = term.col - dst;
1668
1669 term.dirty[term.c.y] = 1;
1670
1671 if(dst >= term.col) {
1672 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1673 return;
1674 }
1675
1676 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1677 size * sizeof(Glyph));
1678 tclearregion(src, term.c.y, dst - 1, term.c.y);
1679 }
1680
1681 void
1682 tinsertblankline(int n) {
1683 if(term.c.y < term.top || term.c.y > term.bot)
1684 return;
1685
1686 tscrolldown(term.c.y, n);
1687 }
1688
1689 void
1690 tdeleteline(int n) {
1691 if(term.c.y < term.top || term.c.y > term.bot)
1692 return;
1693
1694 tscrollup(term.c.y, n);
1695 }
1696
1697 int32_t
1698 tdefcolor(int *attr, int *npar, int l) {
1699 int32_t idx = -1;
1700 uint r, g, b;
1701
1702 switch (attr[*npar + 1]) {
1703 case 2: /* direct colour in RGB space */
1704 if (*npar + 4 >= l) {
1705 fprintf(stderr,
1706 "erresc(38): Incorrect number of parameters (%d)\n",
1707 *npar);
1708 break;
1709 }
1710 r = attr[*npar + 2];
1711 g = attr[*npar + 3];
1712 b = attr[*npar + 4];
1713 *npar += 4;
1714 if(!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
1715 fprintf(stderr, "erresc: bad rgb color (%d,%d,%d)\n",
1716 r, g, b);
1717 else
1718 idx = TRUECOLOR(r, g, b);
1719 break;
1720 case 5: /* indexed colour */
1721 if (*npar + 2 >= l) {
1722 fprintf(stderr,
1723 "erresc(38): Incorrect number of parameters (%d)\n",
1724 *npar);
1725 break;
1726 }
1727 *npar += 2;
1728 if(!BETWEEN(attr[*npar], 0, 255))
1729 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
1730 else
1731 idx = attr[*npar];
1732 break;
1733 case 0: /* implemented defined (only foreground) */
1734 case 1: /* transparent */
1735 case 3: /* direct colour in CMY space */
1736 case 4: /* direct colour in CMYK space */
1737 default:
1738 fprintf(stderr,
1739 "erresc(38): gfx attr %d unknown\n", attr[*npar]);
1740 }
1741
1742 return idx;
1743 }
1744
1745 void
1746 tsetattr(int *attr, int l) {
1747 int i;
1748 int32_t idx;
1749
1750 for(i = 0; i < l; i++) {
1751 switch(attr[i]) {
1752 case 0:
1753 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE \
1754 | ATTR_BOLD | ATTR_ITALIC \
1755 | ATTR_BLINK);
1756 term.c.attr.fg = defaultfg;
1757 term.c.attr.bg = defaultbg;
1758 break;
1759 case 1:
1760 term.c.attr.mode |= ATTR_BOLD;
1761 break;
1762 case 3:
1763 term.c.attr.mode |= ATTR_ITALIC;
1764 break;
1765 case 4:
1766 term.c.attr.mode |= ATTR_UNDERLINE;
1767 break;
1768 case 5: /* slow blink */
1769 case 6: /* rapid blink */
1770 term.c.attr.mode |= ATTR_BLINK;
1771 break;
1772 case 7:
1773 term.c.attr.mode |= ATTR_REVERSE;
1774 break;
1775 case 21:
1776 case 22:
1777 term.c.attr.mode &= ~ATTR_BOLD;
1778 break;
1779 case 23:
1780 term.c.attr.mode &= ~ATTR_ITALIC;
1781 break;
1782 case 24:
1783 term.c.attr.mode &= ~ATTR_UNDERLINE;
1784 break;
1785 case 25:
1786 case 26:
1787 term.c.attr.mode &= ~ATTR_BLINK;
1788 break;
1789 case 27:
1790 term.c.attr.mode &= ~ATTR_REVERSE;
1791 break;
1792 case 38:
1793 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1794 term.c.attr.fg = idx;
1795 break;
1796 case 39:
1797 term.c.attr.fg = defaultfg;
1798 break;
1799 case 48:
1800 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1801 term.c.attr.bg = idx;
1802 break;
1803 case 49:
1804 term.c.attr.bg = defaultbg;
1805 break;
1806 default:
1807 if(BETWEEN(attr[i], 30, 37)) {
1808 term.c.attr.fg = attr[i] - 30;
1809 } else if(BETWEEN(attr[i], 40, 47)) {
1810 term.c.attr.bg = attr[i] - 40;
1811 } else if(BETWEEN(attr[i], 90, 97)) {
1812 term.c.attr.fg = attr[i] - 90 + 8;
1813 } else if(BETWEEN(attr[i], 100, 107)) {
1814 term.c.attr.bg = attr[i] - 100 + 8;
1815 } else {
1816 fprintf(stderr,
1817 "erresc(default): gfx attr %d unknown\n",
1818 attr[i]), csidump();
1819 }
1820 break;
1821 }
1822 }
1823 }
1824
1825 void
1826 tsetscroll(int t, int b) {
1827 int temp;
1828
1829 LIMIT(t, 0, term.row-1);
1830 LIMIT(b, 0, term.row-1);
1831 if(t > b) {
1832 temp = t;
1833 t = b;
1834 b = temp;
1835 }
1836 term.top = t;
1837 term.bot = b;
1838 }
1839
1840 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1841
1842 void
1843 tsetmode(bool priv, bool set, int *args, int narg) {
1844 int *lim, mode;
1845 bool alt;
1846
1847 for(lim = args + narg; args < lim; ++args) {
1848 if(priv) {
1849 switch(*args) {
1850 break;
1851 case 1: /* DECCKM -- Cursor key */
1852 MODBIT(term.mode, set, MODE_APPCURSOR);
1853 break;
1854 case 5: /* DECSCNM -- Reverse video */
1855 mode = term.mode;
1856 MODBIT(term.mode, set, MODE_REVERSE);
1857 if(mode != term.mode)
1858 redraw(REDRAW_TIMEOUT);
1859 break;
1860 case 6: /* DECOM -- Origin */
1861 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1862 tmoveato(0, 0);
1863 break;
1864 case 7: /* DECAWM -- Auto wrap */
1865 MODBIT(term.mode, set, MODE_WRAP);
1866 break;
1867 case 0: /* Error (IGNORED) */
1868 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1869 case 3: /* DECCOLM -- Column (IGNORED) */
1870 case 4: /* DECSCLM -- Scroll (IGNORED) */
1871 case 8: /* DECARM -- Auto repeat (IGNORED) */
1872 case 18: /* DECPFF -- Printer feed (IGNORED) */
1873 case 19: /* DECPEX -- Printer extent (IGNORED) */
1874 case 42: /* DECNRCM -- National characters (IGNORED) */
1875 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1876 break;
1877 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1878 MODBIT(term.mode, !set, MODE_HIDE);
1879 break;
1880 case 9: /* X10 mouse compatibility mode */
1881 xsetpointermotion(0);
1882 MODBIT(term.mode, 0, MODE_MOUSE);
1883 MODBIT(term.mode, set, MODE_MOUSEX10);
1884 break;
1885 case 1000: /* 1000: report button press */
1886 xsetpointermotion(0);
1887 MODBIT(term.mode, 0, MODE_MOUSE);
1888 MODBIT(term.mode, set, MODE_MOUSEBTN);
1889 break;
1890 case 1002: /* 1002: report motion on button press */
1891 xsetpointermotion(0);
1892 MODBIT(term.mode, 0, MODE_MOUSE);
1893 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1894 break;
1895 case 1003: /* 1003: enable all mouse motions */
1896 xsetpointermotion(set);
1897 MODBIT(term.mode, 0, MODE_MOUSE);
1898 MODBIT(term.mode, set, MODE_MOUSEMANY);
1899 break;
1900 case 1004: /* 1004: send focus events to tty */
1901 MODBIT(term.mode, set, MODE_FOCUS);
1902 break;
1903 case 1006: /* 1006: extended reporting mode */
1904 MODBIT(term.mode, set, MODE_MOUSESGR);
1905 break;
1906 case 1034:
1907 MODBIT(term.mode, set, MODE_8BIT);
1908 break;
1909 case 1049: /* swap screen & set/restore cursor as xterm */
1910 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1911 case 47: /* swap screen */
1912 case 1047:
1913 if (!allowaltscreen)
1914 break;
1915 alt = IS_SET(MODE_ALTSCREEN);
1916 if(alt) {
1917 tclearregion(0, 0, term.col-1,
1918 term.row-1);
1919 }
1920 if(set ^ alt) /* set is always 1 or 0 */
1921 tswapscreen();
1922 if(*args != 1049)
1923 break;
1924 /* FALLTRU */
1925 case 1048:
1926 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1927 break;
1928 case 2004: /* 2004: bracketed paste mode */
1929 MODBIT(term.mode, set, MODE_BRCKTPASTE);
1930 break;
1931 /* Not implemented mouse modes. See comments there. */
1932 case 1001: /* mouse highlight mode; can hang the
1933 terminal by design when implemented. */
1934 case 1005: /* UTF-8 mouse mode; will confuse
1935 applications not supporting UTF-8
1936 and luit. */
1937 case 1015: /* urxvt mangled mouse mode; incompatible
1938 and can be mistaken for other control
1939 codes. */
1940 default:
1941 fprintf(stderr,
1942 "erresc: unknown private set/reset mode %d\n",
1943 *args);
1944 break;
1945 }
1946 } else {
1947 switch(*args) {
1948 case 0: /* Error (IGNORED) */
1949 break;
1950 case 2: /* KAM -- keyboard action */
1951 MODBIT(term.mode, set, MODE_KBDLOCK);
1952 break;
1953 case 4: /* IRM -- Insertion-replacement */
1954 MODBIT(term.mode, set, MODE_INSERT);
1955 break;
1956 case 12: /* SRM -- Send/Receive */
1957 MODBIT(term.mode, !set, MODE_ECHO);
1958 break;
1959 case 20: /* LNM -- Linefeed/new line */
1960 MODBIT(term.mode, set, MODE_CRLF);
1961 break;
1962 default:
1963 fprintf(stderr,
1964 "erresc: unknown set/reset mode %d\n",
1965 *args);
1966 break;
1967 }
1968 }
1969 }
1970 }
1971
1972 void
1973 csihandle(void) {
1974 char buf[40];
1975 int len;
1976
1977 switch(csiescseq.mode) {
1978 default:
1979 unknown:
1980 fprintf(stderr, "erresc: unknown csi ");
1981 csidump();
1982 /* die(""); */
1983 break;
1984 case '@': /* ICH -- Insert <n> blank char */
1985 DEFAULT(csiescseq.arg[0], 1);
1986 tinsertblank(csiescseq.arg[0]);
1987 break;
1988 case 'A': /* CUU -- Cursor <n> Up */
1989 DEFAULT(csiescseq.arg[0], 1);
1990 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1991 break;
1992 case 'B': /* CUD -- Cursor <n> Down */
1993 case 'e': /* VPR --Cursor <n> Down */
1994 DEFAULT(csiescseq.arg[0], 1);
1995 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1996 break;
1997 case 'i': /* MC -- Media Copy */
1998 switch(csiescseq.arg[0]) {
1999 case 0:
2000 tdump();
2001 break;
2002 case 1:
2003 tdumpline(term.c.y);
2004 break;
2005 case 2:
2006 tdumpsel();
2007 break;
2008 case 4:
2009 term.mode &= ~MODE_PRINT;
2010 break;
2011 case 5:
2012 term.mode |= MODE_PRINT;
2013 break;
2014 }
2015 break;
2016 case 'c': /* DA -- Device Attributes */
2017 if(csiescseq.arg[0] == 0)
2018 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2019 break;
2020 case 'C': /* CUF -- Cursor <n> Forward */
2021 case 'a': /* HPR -- Cursor <n> Forward */
2022 DEFAULT(csiescseq.arg[0], 1);
2023 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
2024 break;
2025 case 'D': /* CUB -- Cursor <n> Backward */
2026 DEFAULT(csiescseq.arg[0], 1);
2027 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
2028 break;
2029 case 'E': /* CNL -- Cursor <n> Down and first col */
2030 DEFAULT(csiescseq.arg[0], 1);
2031 tmoveto(0, term.c.y+csiescseq.arg[0]);
2032 break;
2033 case 'F': /* CPL -- Cursor <n> Up and first col */
2034 DEFAULT(csiescseq.arg[0], 1);
2035 tmoveto(0, term.c.y-csiescseq.arg[0]);
2036 break;
2037 case 'g': /* TBC -- Tabulation clear */
2038 switch(csiescseq.arg[0]) {
2039 case 0: /* clear current tab stop */
2040 term.tabs[term.c.x] = 0;
2041 break;
2042 case 3: /* clear all the tabs */
2043 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
2044 break;
2045 default:
2046 goto unknown;
2047 }
2048 break;
2049 case 'G': /* CHA -- Move to <col> */
2050 case '`': /* HPA */
2051 DEFAULT(csiescseq.arg[0], 1);
2052 tmoveto(csiescseq.arg[0]-1, term.c.y);
2053 break;
2054 case 'H': /* CUP -- Move to <row> <col> */
2055 case 'f': /* HVP */
2056 DEFAULT(csiescseq.arg[0], 1);
2057 DEFAULT(csiescseq.arg[1], 1);
2058 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
2059 break;
2060 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
2061 DEFAULT(csiescseq.arg[0], 1);
2062 while(csiescseq.arg[0]--)
2063 tputtab(1);
2064 break;
2065 case 'J': /* ED -- Clear screen */
2066 selclear(NULL);
2067 switch(csiescseq.arg[0]) {
2068 case 0: /* below */
2069 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
2070 if(term.c.y < term.row-1) {
2071 tclearregion(0, term.c.y+1, term.col-1,
2072 term.row-1);
2073 }
2074 break;
2075 case 1: /* above */
2076 if(term.c.y > 1)
2077 tclearregion(0, 0, term.col-1, term.c.y-1);
2078 tclearregion(0, term.c.y, term.c.x, term.c.y);
2079 break;
2080 case 2: /* all */
2081 tclearregion(0, 0, term.col-1, term.row-1);
2082 break;
2083 default:
2084 goto unknown;
2085 }
2086 break;
2087 case 'K': /* EL -- Clear line */
2088 switch(csiescseq.arg[0]) {
2089 case 0: /* right */
2090 tclearregion(term.c.x, term.c.y, term.col-1,
2091 term.c.y);
2092 break;
2093 case 1: /* left */
2094 tclearregion(0, term.c.y, term.c.x, term.c.y);
2095 break;
2096 case 2: /* all */
2097 tclearregion(0, term.c.y, term.col-1, term.c.y);
2098 break;
2099 }
2100 break;
2101 case 'S': /* SU -- Scroll <n> line up */
2102 DEFAULT(csiescseq.arg[0], 1);
2103 tscrollup(term.top, csiescseq.arg[0]);
2104 break;
2105 case 'T': /* SD -- Scroll <n> line down */
2106 DEFAULT(csiescseq.arg[0], 1);
2107 tscrolldown(term.top, csiescseq.arg[0]);
2108 break;
2109 case 'L': /* IL -- Insert <n> blank lines */
2110 DEFAULT(csiescseq.arg[0], 1);
2111 tinsertblankline(csiescseq.arg[0]);
2112 break;
2113 case 'l': /* RM -- Reset Mode */
2114 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
2115 break;
2116 case 'M': /* DL -- Delete <n> lines */
2117 DEFAULT(csiescseq.arg[0], 1);
2118 tdeleteline(csiescseq.arg[0]);
2119 break;
2120 case 'X': /* ECH -- Erase <n> char */
2121 DEFAULT(csiescseq.arg[0], 1);
2122 tclearregion(term.c.x, term.c.y,
2123 term.c.x + csiescseq.arg[0] - 1, term.c.y);
2124 break;
2125 case 'P': /* DCH -- Delete <n> char */
2126 DEFAULT(csiescseq.arg[0], 1);
2127 tdeletechar(csiescseq.arg[0]);
2128 break;
2129 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
2130 DEFAULT(csiescseq.arg[0], 1);
2131 while(csiescseq.arg[0]--)
2132 tputtab(0);
2133 break;
2134 case 'd': /* VPA -- Move to <row> */
2135 DEFAULT(csiescseq.arg[0], 1);
2136 tmoveato(term.c.x, csiescseq.arg[0]-1);
2137 break;
2138 case 'h': /* SM -- Set terminal mode */
2139 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
2140 break;
2141 case 'm': /* SGR -- Terminal attribute (color) */
2142 tsetattr(csiescseq.arg, csiescseq.narg);
2143 break;
2144 case 'n': /* DSR – Device Status Report (cursor position) */
2145 if (csiescseq.arg[0] == 6) {
2146 len = snprintf(buf, sizeof(buf),"\033[%i;%iR",
2147 term.c.y+1, term.c.x+1);
2148 ttywrite(buf, len);
2149 break;
2150 }
2151 case 'r': /* DECSTBM -- Set Scrolling Region */
2152 if(csiescseq.priv) {
2153 goto unknown;
2154 } else {
2155 DEFAULT(csiescseq.arg[0], 1);
2156 DEFAULT(csiescseq.arg[1], term.row);
2157 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
2158 tmoveato(0, 0);
2159 }
2160 break;
2161 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
2162 tcursor(CURSOR_SAVE);
2163 break;
2164 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
2165 tcursor(CURSOR_LOAD);
2166 break;
2167 }
2168 }
2169
2170 void
2171 csidump(void) {
2172 int i;
2173 uint c;
2174
2175 printf("ESC[");
2176 for(i = 0; i < csiescseq.len; i++) {
2177 c = csiescseq.buf[i] & 0xff;
2178 if(isprint(c)) {
2179 putchar(c);
2180 } else if(c == '\n') {
2181 printf("(\\n)");
2182 } else if(c == '\r') {
2183 printf("(\\r)");
2184 } else if(c == 0x1b) {
2185 printf("(\\e)");
2186 } else {
2187 printf("(%02x)", c);
2188 }
2189 }
2190 putchar('\n');
2191 }
2192
2193 void
2194 csireset(void) {
2195 memset(&csiescseq, 0, sizeof(csiescseq));
2196 }
2197
2198 void
2199 strhandle(void) {
2200 char *p = NULL;
2201 int j, narg, par;
2202
2203 strparse();
2204 narg = strescseq.narg;
2205 par = atoi(strescseq.args[0]);
2206
2207 switch(strescseq.type) {
2208 case ']': /* OSC -- Operating System Command */
2209 switch(par) {
2210 case 0:
2211 case 1:
2212 case 2:
2213 if(narg > 1)
2214 xsettitle(strescseq.args[1]);
2215 return;
2216 case 4: /* color set */
2217 if(narg < 3)
2218 break;
2219 p = strescseq.args[2];
2220 /* fall through */
2221 case 104: /* color reset, here p = NULL */
2222 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2223 if (!xsetcolorname(j, p)) {
2224 fprintf(stderr, "erresc: invalid color %s\n", p);
2225 } else {
2226 /*
2227 * TODO if defaultbg color is changed, borders
2228 * are dirty
2229 */
2230 redraw(0);
2231 }
2232 return;
2233 }
2234 break;
2235 case 'k': /* old title set compatibility */
2236 xsettitle(strescseq.args[0]);
2237 return;
2238 case 'P': /* DSC -- Device Control String */
2239 case '_': /* APC -- Application Program Command */
2240 case '^': /* PM -- Privacy Message */
2241 return;
2242 }
2243
2244 fprintf(stderr, "erresc: unknown str ");
2245 strdump();
2246 }
2247
2248 void
2249 strparse(void) {
2250 char *p = strescseq.buf;
2251
2252 strescseq.narg = 0;
2253 strescseq.buf[strescseq.len] = '\0';
2254 while(p && strescseq.narg < STR_ARG_SIZ)
2255 strescseq.args[strescseq.narg++] = strsep(&p, ";");
2256 }
2257
2258 void
2259 strdump(void) {
2260 int i;
2261 uint c;
2262
2263 printf("ESC%c", strescseq.type);
2264 for(i = 0; i < strescseq.len; i++) {
2265 c = strescseq.buf[i] & 0xff;
2266 if(c == '\0') {
2267 return;
2268 } else if(isprint(c)) {
2269 putchar(c);
2270 } else if(c == '\n') {
2271 printf("(\\n)");
2272 } else if(c == '\r') {
2273 printf("(\\r)");
2274 } else if(c == 0x1b) {
2275 printf("(\\e)");
2276 } else {
2277 printf("(%02x)", c);
2278 }
2279 }
2280 printf("ESC\\\n");
2281 }
2282
2283 void
2284 strreset(void) {
2285 memset(&strescseq, 0, sizeof(strescseq));
2286 }
2287
2288 void
2289 tprinter(char *s, size_t len) {
2290 if(iofd != -1 && xwrite(iofd, s, len) < 0) {
2291 fprintf(stderr, "Error writing in %s:%s\n",
2292 opt_io, strerror(errno));
2293 close(iofd);
2294 iofd = -1;
2295 }
2296 }
2297
2298 void
2299 toggleprinter(const Arg *arg) {
2300 term.mode ^= MODE_PRINT;
2301 }
2302
2303 void
2304 printscreen(const Arg *arg) {
2305 tdump();
2306 }
2307
2308 void
2309 printsel(const Arg *arg) {
2310 tdumpsel();
2311 }
2312
2313 void
2314 tdumpsel(void)
2315 {
2316 char *ptr;
2317
2318 ptr = getsel();
2319 tprinter(ptr, strlen(ptr));
2320 free(ptr);
2321 }
2322
2323 void
2324 tdumpline(int n) {
2325 Glyph *bp, *end;
2326
2327 bp = &term.line[n][0];
2328 end = &bp[term.col-1];
2329 while(end > bp && !strcmp(" ", end->c))
2330 --end;
2331 if(bp != end || strcmp(bp->c, " ")) {
2332 for( ;bp <= end; ++bp)
2333 tprinter(bp->c, strlen(bp->c));
2334 }
2335 tprinter("\n", 1);
2336 }
2337
2338 void
2339 tdump(void) {
2340 int i;
2341
2342 for(i = 0; i < term.row; ++i)
2343 tdumpline(i);
2344 }
2345
2346 void
2347 tputtab(bool forward) {
2348 uint x = term.c.x;
2349
2350 if(forward) {
2351 if(x == term.col)
2352 return;
2353 for(++x; x < term.col && !term.tabs[x]; ++x)
2354 /* nothing */ ;
2355 } else {
2356 if(x == 0)
2357 return;
2358 for(--x; x > 0 && !term.tabs[x]; --x)
2359 /* nothing */ ;
2360 }
2361 tmoveto(x, term.c.y);
2362 }
2363
2364 void
2365 techo(char *buf, int len) {
2366 for(; len > 0; buf++, len--) {
2367 char c = *buf;
2368
2369 if(c == '\033') { /* escape */
2370 tputc("^", 1);
2371 tputc("[", 1);
2372 } else if(c < '\x20') { /* control code */
2373 if(c != '\n' && c != '\r' && c != '\t') {
2374 c |= '\x40';
2375 tputc("^", 1);
2376 }
2377 tputc(&c, 1);
2378 } else {
2379 break;
2380 }
2381 }
2382 if(len)
2383 tputc(buf, len);
2384 }
2385
2386 void
2387 tdeftran(char ascii) {
2388 char c, (*bp)[2];
2389 static char tbl[][2] = {
2390 {'0', CS_GRAPHIC0}, {'1', CS_GRAPHIC1}, {'A', CS_UK},
2391 {'B', CS_USA}, {'<', CS_MULTI}, {'K', CS_GER},
2392 {'5', CS_FIN}, {'C', CS_FIN},
2393 {0, 0}
2394 };
2395
2396 for (bp = &tbl[0]; (c = (*bp)[0]) && c != ascii; ++bp)
2397 /* nothing */;
2398
2399 if (c == 0)
2400 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2401 else
2402 term.trantbl[term.icharset] = (*bp)[1];
2403 }
2404
2405 void
2406 tselcs(void) {
2407 if (term.trantbl[term.charset] == CS_GRAPHIC0)
2408 term.c.attr.mode |= ATTR_GFX;
2409 else
2410 term.c.attr.mode &= ~ATTR_GFX;
2411 }
2412
2413 void
2414 tputc(char *c, int len) {
2415 uchar ascii = *c;
2416 bool control = ascii < '\x20' || ascii == 0177;
2417 long u8char;
2418 int width;
2419
2420 if(len == 1) {
2421 width = 1;
2422 } else {
2423 utf8decode(c, &u8char);
2424 width = wcwidth(u8char);
2425 }
2426
2427 if(IS_SET(MODE_PRINT))
2428 tprinter(c, len);
2429
2430 /*
2431 * STR sequences must be checked before anything else
2432 * because it can use some control codes as part of the sequence.
2433 */
2434 if(term.esc & ESC_STR) {
2435 switch(ascii) {
2436 case '\033':
2437 term.esc = ESC_START | ESC_STR_END;
2438 break;
2439 case '\a': /* backwards compatibility to xterm */
2440 term.esc = 0;
2441 strhandle();
2442 break;
2443 default:
2444 if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2445 memmove(&strescseq.buf[strescseq.len], c, len);
2446 strescseq.len += len;
2447 } else {
2448 /*
2449 * Here is a bug in terminals. If the user never sends
2450 * some code to stop the str or esc command, then st
2451 * will stop responding. But this is better than
2452 * silently failing with unknown characters. At least
2453 * then users will report back.
2454 *
2455 * In the case users ever get fixed, here is the code:
2456 */
2457 /*
2458 * term.esc = 0;
2459 * strhandle();
2460 */
2461 }
2462 }
2463 return;
2464 }
2465
2466 /*
2467 * Actions of control codes must be performed as soon they arrive
2468 * because they can be embedded inside a control sequence, and
2469 * they must not cause conflicts with sequences.
2470 */
2471 if(control) {
2472 switch(ascii) {
2473 case '\t': /* HT */
2474 tputtab(1);
2475 return;
2476 case '\b': /* BS */
2477 tmoveto(term.c.x-1, term.c.y);
2478 return;
2479 case '\r': /* CR */
2480 tmoveto(0, term.c.y);
2481 return;
2482 case '\f': /* LF */
2483 case '\v': /* VT */
2484 case '\n': /* LF */
2485 /* go to first col if the mode is set */
2486 tnewline(IS_SET(MODE_CRLF));
2487 return;
2488 case '\a': /* BEL */
2489 if(!(xw.state & WIN_FOCUSED))
2490 xseturgency(1);
2491 if (bellvolume)
2492 XBell(xw.dpy, bellvolume);
2493 return;
2494 case '\033': /* ESC */
2495 csireset();
2496 term.esc = ESC_START;
2497 return;
2498 case '\016': /* SO */
2499 term.charset = 0;
2500 tselcs();
2501 return;
2502 case '\017': /* SI */
2503 term.charset = 1;
2504 tselcs();
2505 return;
2506 case '\032': /* SUB */
2507 case '\030': /* CAN */
2508 csireset();
2509 return;
2510 case '\005': /* ENQ (IGNORED) */
2511 case '\000': /* NUL (IGNORED) */
2512 case '\021': /* XON (IGNORED) */
2513 case '\023': /* XOFF (IGNORED) */
2514 case 0177: /* DEL (IGNORED) */
2515 return;
2516 }
2517 } else if(term.esc & ESC_START) {
2518 if(term.esc & ESC_CSI) {
2519 csiescseq.buf[csiescseq.len++] = ascii;
2520 if(BETWEEN(ascii, 0x40, 0x7E)
2521 || csiescseq.len >= \
2522 sizeof(csiescseq.buf)-1) {
2523 term.esc = 0;
2524 csiparse();
2525 csihandle();
2526 }
2527 } else if(term.esc & ESC_STR_END) {
2528 term.esc = 0;
2529 if(ascii == '\\')
2530 strhandle();
2531 } else if(term.esc & ESC_ALTCHARSET) {
2532 tdeftran(ascii);
2533 tselcs();
2534 term.esc = 0;
2535 } else if(term.esc & ESC_TEST) {
2536 if(ascii == '8') { /* DEC screen alignment test. */
2537 char E[UTF_SIZ] = "E";
2538 int x, y;
2539
2540 for(x = 0; x < term.col; ++x) {
2541 for(y = 0; y < term.row; ++y)
2542 tsetchar(E, &term.c.attr, x, y);
2543 }
2544 }
2545 term.esc = 0;
2546 } else {
2547 switch(ascii) {
2548 case '[':
2549 term.esc |= ESC_CSI;
2550 break;
2551 case '#':
2552 term.esc |= ESC_TEST;
2553 break;
2554 case 'P': /* DCS -- Device Control String */
2555 case '_': /* APC -- Application Program Command */
2556 case '^': /* PM -- Privacy Message */
2557 case ']': /* OSC -- Operating System Command */
2558 case 'k': /* old title set compatibility */
2559 strreset();
2560 strescseq.type = ascii;
2561 term.esc |= ESC_STR;
2562 break;
2563 case '(': /* set primary charset G0 */
2564 case ')': /* set secondary charset G1 */
2565 case '*': /* set tertiary charset G2 */
2566 case '+': /* set quaternary charset G3 */
2567 term.icharset = ascii - '(';
2568 term.esc |= ESC_ALTCHARSET;
2569 break;
2570 case 'D': /* IND -- Linefeed */
2571 if(term.c.y == term.bot) {
2572 tscrollup(term.top, 1);
2573 } else {
2574 tmoveto(term.c.x, term.c.y+1);
2575 }
2576 term.esc = 0;
2577 break;
2578 case 'E': /* NEL -- Next line */
2579 tnewline(1); /* always go to first col */
2580 term.esc = 0;
2581 break;
2582 case 'H': /* HTS -- Horizontal tab stop */
2583 term.tabs[term.c.x] = 1;
2584 term.esc = 0;
2585 break;
2586 case 'M': /* RI -- Reverse index */
2587 if(term.c.y == term.top) {
2588 tscrolldown(term.top, 1);
2589 } else {
2590 tmoveto(term.c.x, term.c.y-1);
2591 }
2592 term.esc = 0;
2593 break;
2594 case 'Z': /* DECID -- Identify Terminal */
2595 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2596 term.esc = 0;
2597 break;
2598 case 'c': /* RIS -- Reset to inital state */
2599 treset();
2600 term.esc = 0;
2601 xresettitle();
2602 xloadcols();
2603 break;
2604 case '=': /* DECPAM -- Application keypad */
2605 term.mode |= MODE_APPKEYPAD;
2606 term.esc = 0;
2607 break;
2608 case '>': /* DECPNM -- Normal keypad */
2609 term.mode &= ~MODE_APPKEYPAD;
2610 term.esc = 0;
2611 break;
2612 case '7': /* DECSC -- Save Cursor */
2613 tcursor(CURSOR_SAVE);
2614 term.esc = 0;
2615 break;
2616 case '8': /* DECRC -- Restore Cursor */
2617 tcursor(CURSOR_LOAD);
2618 term.esc = 0;
2619 break;
2620 case '\\': /* ST -- Stop */
2621 term.esc = 0;
2622 break;
2623 default:
2624 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2625 (uchar) ascii, isprint(ascii)? ascii:'.');
2626 term.esc = 0;
2627 }
2628 }
2629 /*
2630 * All characters which form part of a sequence are not
2631 * printed
2632 */
2633 return;
2634 }
2635 /*
2636 * Display control codes only if we are in graphic mode
2637 */
2638 if(control && !(term.c.attr.mode & ATTR_GFX))
2639 return;
2640 if(sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
2641 selclear(NULL);
2642 if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2643 term.line[term.c.y][term.c.x].mode |= ATTR_WRAP;
2644 tnewline(1);
2645 }
2646
2647 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col) {
2648 memmove(&term.line[term.c.y][term.c.x+1],
2649 &term.line[term.c.y][term.c.x],
2650 (term.col - term.c.x - 1) * sizeof(Glyph));
2651 }
2652
2653 if(term.c.x+width > term.col)
2654 tnewline(1);
2655
2656 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2657
2658 if(width == 2) {
2659 term.line[term.c.y][term.c.x].mode |= ATTR_WIDE;
2660 if(term.c.x+1 < term.col) {
2661 term.line[term.c.y][term.c.x+1].c[0] = '\0';
2662 term.line[term.c.y][term.c.x+1].mode = ATTR_WDUMMY;
2663 }
2664 }
2665 if(term.c.x+width < term.col) {
2666 tmoveto(term.c.x+width, term.c.y);
2667 } else {
2668 term.c.state |= CURSOR_WRAPNEXT;
2669 }
2670 }
2671
2672 int
2673 tresize(int col, int row) {
2674 int i;
2675 int minrow = MIN(row, term.row);
2676 int mincol = MIN(col, term.col);
2677 int slide = term.c.y - row + 1;
2678 bool *bp;
2679 Line *orig;
2680
2681 if(col < 1 || row < 1)
2682 return 0;
2683
2684 /* free unneeded rows */
2685 i = 0;
2686 if(slide > 0) {
2687 /*
2688 * slide screen to keep cursor where we expect it -
2689 * tscrollup would work here, but we can optimize to
2690 * memmove because we're freeing the earlier lines
2691 */
2692 for(/* i = 0 */; i < slide; i++) {
2693 free(term.line[i]);
2694 free(term.alt[i]);
2695 }
2696 memmove(term.line, term.line + slide, row * sizeof(Line));
2697 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2698 }
2699 for(i += row; i < term.row; i++) {
2700 free(term.line[i]);
2701 free(term.alt[i]);
2702 }
2703
2704 /* resize to new height */
2705 term.line = xrealloc(term.line, row * sizeof(Line));
2706 term.alt = xrealloc(term.alt, row * sizeof(Line));
2707 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2708 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2709
2710 /* resize each row to new width, zero-pad if needed */
2711 for(i = 0; i < minrow; i++) {
2712 term.dirty[i] = 1;
2713 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2714 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2715 }
2716
2717 /* allocate any new rows */
2718 for(/* i == minrow */; i < row; i++) {
2719 term.dirty[i] = 1;
2720 term.line[i] = xmalloc(col * sizeof(Glyph));
2721 term.alt[i] = xmalloc(col * sizeof(Glyph));
2722 }
2723 if(col > term.col) {
2724 bp = term.tabs + term.col;
2725
2726 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2727 while(--bp > term.tabs && !*bp)
2728 /* nothing */ ;
2729 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2730 *bp = 1;
2731 }
2732 /* update terminal size */
2733 term.col = col;
2734 term.row = row;
2735 /* reset scrolling region */
2736 tsetscroll(0, row-1);
2737 /* make use of the LIMIT in tmoveto */
2738 tmoveto(term.c.x, term.c.y);
2739 /* Clearing both screens */
2740 orig = term.line;
2741 do {
2742 if(mincol < col && 0 < minrow) {
2743 tclearregion(mincol, 0, col - 1, minrow - 1);
2744 }
2745 if(0 < col && minrow < row) {
2746 tclearregion(0, minrow, col - 1, row - 1);
2747 }
2748 tswapscreen();
2749 } while(orig != term.line);
2750
2751 return (slide > 0);
2752 }
2753
2754 void
2755 xresize(int col, int row) {
2756 xw.tw = MAX(1, col * xw.cw);
2757 xw.th = MAX(1, row * xw.ch);
2758
2759 XFreePixmap(xw.dpy, xw.buf);
2760 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2761 DefaultDepth(xw.dpy, xw.scr));
2762 XftDrawChange(xw.draw, xw.buf);
2763 xclear(0, 0, xw.w, xw.h);
2764 }
2765
2766 static inline ushort
2767 sixd_to_16bit(int x) {
2768 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2769 }
2770
2771 void
2772 xloadcols(void) {
2773 int i, r, g, b;
2774 XRenderColor color = { .alpha = 0xffff };
2775 static bool loaded;
2776 Colour *cp;
2777
2778 if(loaded) {
2779 for (cp = dc.col; cp < dc.col + LEN(dc.col); ++cp)
2780 XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
2781 }
2782
2783 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
2784 for(i = 0; i < LEN(colorname); i++) {
2785 if(!colorname[i])
2786 continue;
2787 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2788 die("Could not allocate color '%s'\n", colorname[i]);
2789 }
2790 }
2791
2792 /* load colors [16-255] ; same colors as xterm */
2793 for(i = 16, r = 0; r < 6; r++) {
2794 for(g = 0; g < 6; g++) {
2795 for(b = 0; b < 6; b++) {
2796 color.red = sixd_to_16bit(r);
2797 color.green = sixd_to_16bit(g);
2798 color.blue = sixd_to_16bit(b);
2799 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i])) {
2800 die("Could not allocate color %d\n", i);
2801 }
2802 i++;
2803 }
2804 }
2805 }
2806
2807 for(r = 0; r < 24; r++, i++) {
2808 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
2809 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color,
2810 &dc.col[i])) {
2811 die("Could not allocate color %d\n", i);
2812 }
2813 }
2814 loaded = true;
2815 }
2816
2817 int
2818 xsetcolorname(int x, const char *name) {
2819 XRenderColor color = { .alpha = 0xffff };
2820 Colour colour;
2821 if (x < 0 || x > LEN(colorname))
2822 return -1;
2823 if(!name) {
2824 if(16 <= x && x < 16 + 216) {
2825 int r = (x - 16) / 36, g = ((x - 16) % 36) / 6, b = (x - 16) % 6;
2826 color.red = sixd_to_16bit(r);
2827 color.green = sixd_to_16bit(g);
2828 color.blue = sixd_to_16bit(b);
2829 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2830 return 0; /* something went wrong */
2831 dc.col[x] = colour;
2832 return 1;
2833 } else if (16 + 216 <= x && x < 256) {
2834 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (x - (16 + 216));
2835 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2836 return 0; /* something went wrong */
2837 dc.col[x] = colour;
2838 return 1;
2839 } else {
2840 name = colorname[x];
2841 }
2842 }
2843 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &colour))
2844 return 0;
2845 dc.col[x] = colour;
2846 return 1;
2847 }
2848
2849 void
2850 xtermclear(int col1, int row1, int col2, int row2) {
2851 XftDrawRect(xw.draw,
2852 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2853 borderpx + col1 * xw.cw,
2854 borderpx + row1 * xw.ch,
2855 (col2-col1+1) * xw.cw,
2856 (row2-row1+1) * xw.ch);
2857 }
2858
2859 /*
2860 * Absolute coordinates.
2861 */
2862 void
2863 xclear(int x1, int y1, int x2, int y2) {
2864 XftDrawRect(xw.draw,
2865 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2866 x1, y1, x2-x1, y2-y1);
2867 }
2868
2869 void
2870 xhints(void) {
2871 XClassHint class = {opt_class ? opt_class : termname, termname};
2872 XWMHints wm = {.flags = InputHint, .input = 1};
2873 XSizeHints *sizeh = NULL;
2874
2875 sizeh = XAllocSizeHints();
2876 if(xw.isfixed == False) {
2877 sizeh->flags = PSize | PResizeInc | PBaseSize;
2878 sizeh->height = xw.h;
2879 sizeh->width = xw.w;
2880 sizeh->height_inc = xw.ch;
2881 sizeh->width_inc = xw.cw;
2882 sizeh->base_height = 2 * borderpx;
2883 sizeh->base_width = 2 * borderpx;
2884 } else {
2885 sizeh->flags = PMaxSize | PMinSize;
2886 sizeh->min_width = sizeh->max_width = xw.fw;
2887 sizeh->min_height = sizeh->max_height = xw.fh;
2888 }
2889
2890 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
2891 &class);
2892 XFree(sizeh);
2893 }
2894
2895 int
2896 xloadfont(Font *f, FcPattern *pattern) {
2897 FcPattern *match;
2898 FcResult result;
2899
2900 match = FcFontMatch(NULL, pattern, &result);
2901 if(!match)
2902 return 1;
2903
2904 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2905 FcPatternDestroy(match);
2906 return 1;
2907 }
2908
2909 f->set = NULL;
2910 f->pattern = FcPatternDuplicate(pattern);
2911
2912 f->ascent = f->match->ascent;
2913 f->descent = f->match->descent;
2914 f->lbearing = 0;
2915 f->rbearing = f->match->max_advance_width;
2916
2917 f->height = f->ascent + f->descent;
2918 f->width = f->lbearing + f->rbearing;
2919
2920 return 0;
2921 }
2922
2923 void
2924 xloadfonts(char *fontstr, double fontsize) {
2925 FcPattern *pattern;
2926 FcResult r_sz, r_psz;
2927 double fontval;
2928
2929 if(fontstr[0] == '-') {
2930 pattern = XftXlfdParse(fontstr, False, False);
2931 } else {
2932 pattern = FcNameParse((FcChar8 *)fontstr);
2933 }
2934
2935 if(!pattern)
2936 die("st: can't open font %s\n", fontstr);
2937
2938 if(fontsize > 0) {
2939 FcPatternDel(pattern, FC_PIXEL_SIZE);
2940 FcPatternDel(pattern, FC_SIZE);
2941 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2942 usedfontsize = fontsize;
2943 } else {
2944 r_psz = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2945 r_sz = FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval);
2946 if(r_psz == FcResultMatch) {
2947 usedfontsize = fontval;
2948 } else if(r_sz == FcResultMatch) {
2949 usedfontsize = -1;
2950 } else {
2951 /*
2952 * Default font size is 12, if none given. This is to
2953 * have a known usedfontsize value.
2954 */
2955 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
2956 usedfontsize = 12;
2957 }
2958 }
2959
2960 FcConfigSubstitute(0, pattern, FcMatchPattern);
2961 FcDefaultSubstitute(pattern);
2962
2963 if(xloadfont(&dc.font, pattern))
2964 die("st: can't open font %s\n", fontstr);
2965
2966 if(usedfontsize < 0) {
2967 FcPatternGetDouble(dc.font.match->pattern,
2968 FC_PIXEL_SIZE, 0, &fontval);
2969 usedfontsize = fontval;
2970 }
2971
2972 /* Setting character width and height. */
2973 xw.cw = CEIL(dc.font.width * cwscale);
2974 xw.ch = CEIL(dc.font.height * chscale);
2975
2976 FcPatternDel(pattern, FC_SLANT);
2977 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
2978 if(xloadfont(&dc.ifont, pattern))
2979 die("st: can't open font %s\n", fontstr);
2980
2981 FcPatternDel(pattern, FC_WEIGHT);
2982 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
2983 if(xloadfont(&dc.ibfont, pattern))
2984 die("st: can't open font %s\n", fontstr);
2985
2986 FcPatternDel(pattern, FC_SLANT);
2987 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
2988 if(xloadfont(&dc.bfont, pattern))
2989 die("st: can't open font %s\n", fontstr);
2990
2991 FcPatternDestroy(pattern);
2992 }
2993
2994 int
2995 xloadfontset(Font *f) {
2996 FcResult result;
2997
2998 if(!(f->set = FcFontSort(0, f->pattern, FcTrue, 0, &result)))
2999 return 1;
3000 return 0;
3001 }
3002
3003 void
3004 xunloadfont(Font *f) {
3005 XftFontClose(xw.dpy, f->match);
3006 FcPatternDestroy(f->pattern);
3007 if(f->set)
3008 FcFontSetDestroy(f->set);
3009 }
3010
3011 void
3012 xunloadfonts(void) {
3013 int i;
3014
3015 /* Free the loaded fonts in the font cache. */
3016 for(i = 0; i < frclen; i++) {
3017 XftFontClose(xw.dpy, frc[i].font);
3018 }
3019 frclen = 0;
3020
3021 xunloadfont(&dc.font);
3022 xunloadfont(&dc.bfont);
3023 xunloadfont(&dc.ifont);
3024 xunloadfont(&dc.ibfont);
3025 }
3026
3027 void
3028 xzoom(const Arg *arg) {
3029 xunloadfonts();
3030 xloadfonts(usedfont, usedfontsize + arg->i);
3031 cresize(0, 0);
3032 redraw(0);
3033 }
3034
3035 void
3036 xinit(void) {
3037 XGCValues gcvalues;
3038 Cursor cursor;
3039 Window parent;
3040 int sw, sh;
3041 pid_t thispid = getpid();
3042
3043 if(!(xw.dpy = XOpenDisplay(NULL)))
3044 die("Can't open display\n");
3045 xw.scr = XDefaultScreen(xw.dpy);
3046 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
3047
3048 /* font */
3049 if(!FcInit())
3050 die("Could not init fontconfig.\n");
3051
3052 usedfont = (opt_font == NULL)? font : opt_font;
3053 xloadfonts(usedfont, 0);
3054
3055 /* colors */
3056 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
3057 xloadcols();
3058
3059 /* adjust fixed window geometry */
3060 if(xw.isfixed) {
3061 sw = DisplayWidth(xw.dpy, xw.scr);
3062 sh = DisplayHeight(xw.dpy, xw.scr);
3063 if(xw.fx < 0)
3064 xw.fx = sw + xw.fx - xw.fw - 1;
3065 if(xw.fy < 0)
3066 xw.fy = sh + xw.fy - xw.fh - 1;
3067
3068 xw.h = xw.fh;
3069 xw.w = xw.fw;
3070 } else {
3071 /* window - default size */
3072 xw.h = 2 * borderpx + term.row * xw.ch;
3073 xw.w = 2 * borderpx + term.col * xw.cw;
3074 xw.fx = 0;
3075 xw.fy = 0;
3076 }
3077
3078 /* Events */
3079 xw.attrs.background_pixel = dc.col[defaultbg].pixel;
3080 xw.attrs.border_pixel = dc.col[defaultbg].pixel;
3081 xw.attrs.bit_gravity = NorthWestGravity;
3082 xw.attrs.event_mask = FocusChangeMask | KeyPressMask
3083 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
3084 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
3085 xw.attrs.colormap = xw.cmap;
3086
3087 parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
3088 XRootWindow(xw.dpy, xw.scr);
3089 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
3090 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
3091 xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
3092 | CWEventMask | CWColormap, &xw.attrs);
3093
3094 memset(&gcvalues, 0, sizeof(gcvalues));
3095 gcvalues.graphics_exposures = False;
3096 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
3097 &gcvalues);
3098 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
3099 DefaultDepth(xw.dpy, xw.scr));
3100 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
3101 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
3102
3103 /* Xft rendering context */
3104 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
3105
3106 /* input methods */
3107 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3108 XSetLocaleModifiers("@im=local");
3109 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3110 XSetLocaleModifiers("@im=");
3111 if((xw.xim = XOpenIM(xw.dpy,
3112 NULL, NULL, NULL)) == NULL) {
3113 die("XOpenIM failed. Could not open input"
3114 " device.\n");
3115 }
3116 }
3117 }
3118 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
3119 | XIMStatusNothing, XNClientWindow, xw.win,
3120 XNFocusWindow, xw.win, NULL);
3121 if(xw.xic == NULL)
3122 die("XCreateIC failed. Could not obtain input method.\n");
3123
3124 /* white cursor, black outline */
3125 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
3126 XDefineCursor(xw.dpy, xw.win, cursor);
3127 XRecolorCursor(xw.dpy, cursor,
3128 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
3129 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
3130
3131 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
3132 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
3133 xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
3134 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
3135
3136 xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
3137 XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
3138 PropModeReplace, (unsigned char *)&thispid, 1);
3139
3140 xresettitle();
3141 XMapWindow(xw.dpy, xw.win);
3142 xhints();
3143 XSync(xw.dpy, 0);
3144 }
3145
3146 void
3147 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
3148 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
3149 width = charlen * xw.cw, xp, i;
3150 int frcflags;
3151 int u8fl, u8fblen, u8cblen, doesexist;
3152 char *u8c, *u8fs;
3153 long u8char;
3154 Font *font = &dc.font;
3155 FcResult fcres;
3156 FcPattern *fcpattern, *fontpattern;
3157 FcFontSet *fcsets[] = { NULL };
3158 FcCharSet *fccharset;
3159 Colour *fg, *bg, *temp, revfg, revbg, truefg, truebg;
3160 XRenderColor colfg, colbg;
3161 Rectangle r;
3162 int oneatatime;
3163
3164 frcflags = FRC_NORMAL;
3165
3166 if(base.mode & ATTR_ITALIC) {
3167 if(base.fg == defaultfg)
3168 base.fg = defaultitalic;
3169 font = &dc.ifont;
3170 frcflags = FRC_ITALIC;
3171 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
3172 if(base.fg == defaultfg)
3173 base.fg = defaultitalic;
3174 font = &dc.ibfont;
3175 frcflags = FRC_ITALICBOLD;
3176 } else if(base.mode & ATTR_UNDERLINE) {
3177 if(base.fg == defaultfg)
3178 base.fg = defaultunderline;
3179 }
3180
3181 if(IS_TRUECOL(base.fg)) {
3182 colfg.alpha = 0xffff;
3183 colfg.red = TRUERED(base.fg);
3184 colfg.green = TRUEGREEN(base.fg);
3185 colfg.blue = TRUEBLUE(base.fg);
3186 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
3187 fg = &truefg;
3188 } else {
3189 fg = &dc.col[base.fg];
3190 }
3191
3192 if(IS_TRUECOL(base.bg)) {
3193 colbg.alpha = 0xffff;
3194 colbg.green = TRUEGREEN(base.bg);
3195 colbg.red = TRUERED(base.bg);
3196 colbg.blue = TRUEBLUE(base.bg);
3197 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
3198 bg = &truebg;
3199 } else {
3200 bg = &dc.col[base.bg];
3201 }
3202
3203 if(base.mode & ATTR_BOLD) {
3204 if(BETWEEN(base.fg, 0, 7)) {
3205 /* basic system colors */
3206 fg = &dc.col[base.fg + 8];
3207 } else if(BETWEEN(base.fg, 16, 195)) {
3208 /* 256 colors */
3209 fg = &dc.col[base.fg + 36];
3210 } else if(BETWEEN(base.fg, 232, 251)) {
3211 /* greyscale */
3212 fg = &dc.col[base.fg + 4];
3213 }
3214 /*
3215 * Those ranges will not be brightened:
3216 * 8 - 15 – bright system colors
3217 * 196 - 231 – highest 256 color cube
3218 * 252 - 255 – brightest colors in greyscale
3219 */
3220 font = &dc.bfont;
3221 frcflags = FRC_BOLD;
3222 }
3223
3224 if(IS_SET(MODE_REVERSE)) {
3225 if(fg == &dc.col[defaultfg]) {
3226 fg = &dc.col[defaultbg];
3227 } else {
3228 colfg.red = ~fg->color.red;
3229 colfg.green = ~fg->color.green;
3230 colfg.blue = ~fg->color.blue;
3231 colfg.alpha = fg->color.alpha;
3232 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
3233 &revfg);
3234 fg = &revfg;
3235 }
3236
3237 if(bg == &dc.col[defaultbg]) {
3238 bg = &dc.col[defaultfg];
3239 } else {
3240 colbg.red = ~bg->color.red;
3241 colbg.green = ~bg->color.green;
3242 colbg.blue = ~bg->color.blue;
3243 colbg.alpha = bg->color.alpha;
3244 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
3245 &revbg);
3246 bg = &revbg;
3247 }
3248 }
3249
3250 if(base.mode & ATTR_REVERSE) {
3251 temp = fg;
3252 fg = bg;
3253 bg = temp;
3254 }
3255
3256 if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
3257 fg = bg;
3258
3259 /* Intelligent cleaning up of the borders. */
3260 if(x == 0) {
3261 xclear(0, (y == 0)? 0 : winy, borderpx,
3262 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
3263 }
3264 if(x + charlen >= term.col) {
3265 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
3266 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
3267 }
3268 if(y == 0)
3269 xclear(winx, 0, winx + width, borderpx);
3270 if(y == term.row-1)
3271 xclear(winx, winy + xw.ch, winx + width, xw.h);
3272
3273 /* Clean up the region we want to draw to. */
3274 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
3275
3276 /* Set the clip region because Xft is sometimes dirty. */
3277 r.x = 0;
3278 r.y = 0;
3279 r.height = xw.ch;
3280 r.width = width;
3281 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
3282
3283 for(xp = winx; bytelen > 0;) {
3284 /*
3285 * Search for the range in the to be printed string of glyphs
3286 * that are in the main font. Then print that range. If
3287 * some glyph is found that is not in the font, do the
3288 * fallback dance.
3289 */
3290 u8fs = s;
3291 u8fblen = 0;
3292 u8fl = 0;
3293 oneatatime = font->width != xw.cw;
3294 for(;;) {
3295 u8c = s;
3296 u8cblen = utf8decode(s, &u8char);
3297 s += u8cblen;
3298 bytelen -= u8cblen;
3299
3300 doesexist = XftCharExists(xw.dpy, font->match, u8char);
3301 if(oneatatime || !doesexist || bytelen <= 0) {
3302 if(oneatatime || bytelen <= 0) {
3303 if(doesexist) {
3304 u8fl++;
3305 u8fblen += u8cblen;
3306 }
3307 }
3308
3309 if(u8fl > 0) {
3310 XftDrawStringUtf8(xw.draw, fg,
3311 font->match, xp,
3312 winy + font->ascent,
3313 (FcChar8 *)u8fs,
3314 u8fblen);
3315 xp += xw.cw * u8fl;
3316
3317 }
3318 break;
3319 }
3320
3321 u8fl++;
3322 u8fblen += u8cblen;
3323 }
3324 if(doesexist) {
3325 if(oneatatime)
3326 continue;
3327 break;
3328 }
3329
3330 /* Search the font cache. */
3331 for(i = 0; i < frclen; i++) {
3332 if(XftCharExists(xw.dpy, frc[i].font, u8char)
3333 && frc[i].flags == frcflags) {
3334 break;
3335 }
3336 }
3337
3338 /* Nothing was found. */
3339 if(i >= frclen) {
3340 if(!font->set)
3341 xloadfontset(font);
3342 fcsets[0] = font->set;
3343
3344 /*
3345 * Nothing was found in the cache. Now use
3346 * some dozen of Fontconfig calls to get the
3347 * font for one single character.
3348 *
3349 * Xft and fontconfig are design failures.
3350 */
3351 fcpattern = FcPatternDuplicate(font->pattern);
3352 fccharset = FcCharSetCreate();
3353
3354 FcCharSetAddChar(fccharset, u8char);
3355 FcPatternAddCharSet(fcpattern, FC_CHARSET,
3356 fccharset);
3357 FcPatternAddBool(fcpattern, FC_SCALABLE,
3358 FcTrue);
3359
3360 FcConfigSubstitute(0, fcpattern,
3361 FcMatchPattern);
3362 FcDefaultSubstitute(fcpattern);
3363
3364 fontpattern = FcFontSetMatch(0, fcsets,
3365 FcTrue, fcpattern, &fcres);
3366
3367 /*
3368 * Overwrite or create the new cache entry.
3369 */
3370 if(frclen >= LEN(frc)) {
3371 frclen = LEN(frc) - 1;
3372 XftFontClose(xw.dpy, frc[frclen].font);
3373 }
3374
3375 frc[frclen].font = XftFontOpenPattern(xw.dpy,
3376 fontpattern);
3377 frc[frclen].flags = frcflags;
3378
3379 i = frclen;
3380 frclen++;
3381
3382 FcPatternDestroy(fcpattern);
3383 FcCharSetDestroy(fccharset);
3384 }
3385
3386 XftDrawStringUtf8(xw.draw, fg, frc[i].font,
3387 xp, winy + frc[i].font->ascent,
3388 (FcChar8 *)u8c, u8cblen);
3389
3390 xp += xw.cw * wcwidth(u8char);
3391 }
3392
3393 /*
3394 * This is how the loop above actually should be. Why does the
3395 * application have to care about font details?
3396 *
3397 * I have to repeat: Xft and Fontconfig are design failures.
3398 */
3399 /*
3400 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
3401 winy + font->ascent, (FcChar8 *)s, bytelen);
3402 */
3403
3404 if(base.mode & ATTR_UNDERLINE) {
3405 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
3406 width, 1);
3407 }
3408
3409 /* Reset clip to none. */
3410 XftDrawSetClip(xw.draw, 0);
3411 }
3412
3413 void
3414 xdrawcursor(void) {
3415 static int oldx = 0, oldy = 0;
3416 int sl, width, curx;
3417 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
3418
3419 LIMIT(oldx, 0, term.col-1);
3420 LIMIT(oldy, 0, term.row-1);
3421
3422 curx = term.c.x;
3423
3424 /* adjust position if in dummy */
3425 if(term.line[oldy][oldx].mode & ATTR_WDUMMY)
3426 oldx--;
3427 if(term.line[term.c.y][curx].mode & ATTR_WDUMMY)
3428 curx--;
3429
3430 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
3431
3432 /* remove the old cursor */
3433 sl = utf8size(term.line[oldy][oldx].c);
3434 width = (term.line[oldy][oldx].mode & ATTR_WIDE)? 2 : 1;
3435 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
3436 oldy, width, sl);
3437
3438 /* draw the new one */
3439 if(!(IS_SET(MODE_HIDE))) {
3440 if(xw.state & WIN_FOCUSED) {
3441 if(IS_SET(MODE_REVERSE)) {
3442 g.mode |= ATTR_REVERSE;
3443 g.fg = defaultcs;
3444 g.bg = defaultfg;
3445 }
3446
3447 sl = utf8size(g.c);
3448 width = (term.line[term.c.y][curx].mode & ATTR_WIDE)\
3449 ? 2 : 1;
3450 xdraws(g.c, g, term.c.x, term.c.y, width, sl);
3451 } else {
3452 XftDrawRect(xw.draw, &dc.col[defaultcs],
3453 borderpx + curx * xw.cw,
3454 borderpx + term.c.y * xw.ch,
3455 xw.cw - 1, 1);
3456 XftDrawRect(xw.draw, &dc.col[defaultcs],
3457 borderpx + curx * xw.cw,
3458 borderpx + term.c.y * xw.ch,
3459 1, xw.ch - 1);
3460 XftDrawRect(xw.draw, &dc.col[defaultcs],
3461 borderpx + (curx + 1) * xw.cw - 1,
3462 borderpx + term.c.y * xw.ch,
3463 1, xw.ch - 1);
3464 XftDrawRect(xw.draw, &dc.col[defaultcs],
3465 borderpx + curx * xw.cw,
3466 borderpx + (term.c.y + 1) * xw.ch - 1,
3467 xw.cw, 1);
3468 }
3469 oldx = curx, oldy = term.c.y;
3470 }
3471 }
3472
3473
3474 void
3475 xsettitle(char *p) {
3476 XTextProperty prop;
3477
3478 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3479 &prop);
3480 XSetWMName(xw.dpy, xw.win, &prop);
3481 XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
3482 XFree(prop.value);
3483 }
3484
3485 void
3486 xresettitle(void) {
3487 xsettitle(opt_title ? opt_title : "st");
3488 }
3489
3490 void
3491 redraw(int timeout) {
3492 struct timespec tv = {0, timeout * 1000};
3493
3494 tfulldirt();
3495 draw();
3496
3497 if(timeout > 0) {
3498 nanosleep(&tv, NULL);
3499 XSync(xw.dpy, False); /* necessary for a good tput flash */
3500 }
3501 }
3502
3503 void
3504 draw(void) {
3505 drawregion(0, 0, term.col, term.row);
3506 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3507 xw.h, 0, 0);
3508 XSetForeground(xw.dpy, dc.gc,
3509 dc.col[IS_SET(MODE_REVERSE)?
3510 defaultfg : defaultbg].pixel);
3511 }
3512
3513 void
3514 drawregion(int x1, int y1, int x2, int y2) {
3515 int ic, ib, x, y, ox, sl;
3516 Glyph base, new;
3517 char buf[DRAW_BUF_SIZ];
3518 bool ena_sel = sel.ob.x != -1;
3519 long u8char;
3520
3521 if(sel.alt ^ IS_SET(MODE_ALTSCREEN))
3522 ena_sel = 0;
3523
3524 if(!(xw.state & WIN_VISIBLE))
3525 return;
3526
3527 for(y = y1; y < y2; y++) {
3528 if(!term.dirty[y])
3529 continue;
3530
3531 xtermclear(0, y, term.col, y);
3532 term.dirty[y] = 0;
3533 base = term.line[y][0];
3534 ic = ib = ox = 0;
3535 for(x = x1; x < x2; x++) {
3536 new = term.line[y][x];
3537 if(new.mode == ATTR_WDUMMY)
3538 continue;
3539 if(ena_sel && selected(x, y))
3540 new.mode ^= ATTR_REVERSE;
3541 if(ib > 0 && (ATTRCMP(base, new)
3542 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3543 xdraws(buf, base, ox, y, ic, ib);
3544 ic = ib = 0;
3545 }
3546 if(ib == 0) {
3547 ox = x;
3548 base = new;
3549 }
3550
3551 sl = utf8decode(new.c, &u8char);
3552 memcpy(buf+ib, new.c, sl);
3553 ib += sl;
3554 ic += (new.mode & ATTR_WIDE)? 2 : 1;
3555 }
3556 if(ib > 0)
3557 xdraws(buf, base, ox, y, ic, ib);
3558 }
3559 xdrawcursor();
3560 }
3561
3562 void
3563 expose(XEvent *ev) {
3564 XExposeEvent *e = &ev->xexpose;
3565
3566 if(xw.state & WIN_REDRAW) {
3567 if(!e->count)
3568 xw.state &= ~WIN_REDRAW;
3569 }
3570 redraw(0);
3571 }
3572
3573 void
3574 visibility(XEvent *ev) {
3575 XVisibilityEvent *e = &ev->xvisibility;
3576
3577 if(e->state == VisibilityFullyObscured) {
3578 xw.state &= ~WIN_VISIBLE;
3579 } else if(!(xw.state & WIN_VISIBLE)) {
3580 /* need a full redraw for next Expose, not just a buf copy */
3581 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3582 }
3583 }
3584
3585 void
3586 unmap(XEvent *ev) {
3587 xw.state &= ~WIN_VISIBLE;
3588 }
3589
3590 void
3591 xsetpointermotion(int set) {
3592 MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
3593 XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
3594 }
3595
3596 void
3597 xseturgency(int add) {
3598 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3599
3600 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
3601 XSetWMHints(xw.dpy, xw.win, h);
3602 XFree(h);
3603 }
3604
3605 void
3606 focus(XEvent *ev) {
3607 XFocusChangeEvent *e = &ev->xfocus;
3608
3609 if(e->mode == NotifyGrab)
3610 return;
3611
3612 if(ev->type == FocusIn) {
3613 XSetICFocus(xw.xic);
3614 xw.state |= WIN_FOCUSED;
3615 xseturgency(0);
3616 if(IS_SET(MODE_FOCUS))
3617 ttywrite("\033[I", 3);
3618 } else {
3619 XUnsetICFocus(xw.xic);
3620 xw.state &= ~WIN_FOCUSED;
3621 if(IS_SET(MODE_FOCUS))
3622 ttywrite("\033[O", 3);
3623 }
3624 }
3625
3626 static inline bool
3627 match(uint mask, uint state) {
3628 return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
3629 }
3630
3631 void
3632 numlock(const Arg *dummy) {
3633 term.numlock ^= 1;
3634 }
3635
3636 char*
3637 kmap(KeySym k, uint state) {
3638 Key *kp;
3639 int i;
3640
3641 /* Check for mapped keys out of X11 function keys. */
3642 for(i = 0; i < LEN(mappedkeys); i++) {
3643 if(mappedkeys[i] == k)
3644 break;
3645 }
3646 if(i == LEN(mappedkeys)) {
3647 if((k & 0xFFFF) < 0xFD00)
3648 return NULL;
3649 }
3650
3651 for(kp = key; kp < key + LEN(key); kp++) {
3652 if(kp->k != k)
3653 continue;
3654
3655 if(!match(kp->mask, state))
3656 continue;
3657
3658 if(IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
3659 continue;
3660 if(term.numlock && kp->appkey == 2)
3661 continue;
3662
3663 if(IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
3664 continue;
3665
3666 if(IS_SET(MODE_CRLF) ? kp->crlf < 0 : kp->crlf > 0)
3667 continue;
3668
3669 return kp->s;
3670 }
3671
3672 return NULL;
3673 }
3674
3675 void
3676 kpress(XEvent *ev) {
3677 XKeyEvent *e = &ev->xkey;
3678 KeySym ksym;
3679 char buf[32], *customkey;
3680 int len;
3681 long c;
3682 Status status;
3683 Shortcut *bp;
3684
3685 if(IS_SET(MODE_KBDLOCK))
3686 return;
3687
3688 len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
3689 /* 1. shortcuts */
3690 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3691 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3692 bp->func(&(bp->arg));
3693 return;
3694 }
3695 }
3696
3697 /* 2. custom keys from config.h */
3698 if((customkey = kmap(ksym, e->state))) {
3699 ttysend(customkey, strlen(customkey));
3700 return;
3701 }
3702
3703 /* 3. composed string from input method */
3704 if(len == 0)
3705 return;
3706 if(len == 1 && e->state & Mod1Mask) {
3707 if(IS_SET(MODE_8BIT)) {
3708 if(*buf < 0177) {
3709 c = *buf | 0x80;
3710 len = utf8encode(&c, buf);
3711 }
3712 } else {
3713 buf[1] = buf[0];
3714 buf[0] = '\033';
3715 len = 2;
3716 }
3717 }
3718 ttysend(buf, len);
3719 }
3720
3721
3722 void
3723 cmessage(XEvent *e) {
3724 /*
3725 * See xembed specs
3726 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3727 */
3728 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3729 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3730 xw.state |= WIN_FOCUSED;
3731 xseturgency(0);
3732 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3733 xw.state &= ~WIN_FOCUSED;
3734 }
3735 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3736 /* Send SIGHUP to shell */
3737 kill(pid, SIGHUP);
3738 exit(EXIT_SUCCESS);
3739 }
3740 }
3741
3742 void
3743 cresize(int width, int height) {
3744 int col, row;
3745
3746 if(width != 0)
3747 xw.w = width;
3748 if(height != 0)
3749 xw.h = height;
3750
3751 col = (xw.w - 2 * borderpx) / xw.cw;
3752 row = (xw.h - 2 * borderpx) / xw.ch;
3753
3754 tresize(col, row);
3755 xresize(col, row);
3756 ttyresize();
3757 }
3758
3759 void
3760 resize(XEvent *e) {
3761 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3762 return;
3763
3764 cresize(e->xconfigure.width, e->xconfigure.height);
3765 }
3766
3767 void
3768 run(void) {
3769 XEvent ev;
3770 int w = xw.w, h = xw.h;
3771 fd_set rfd;
3772 int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3773 struct timeval drawtimeout, *tv = NULL, now, last, lastblink;
3774
3775 /* Waiting for window mapping */
3776 while(1) {
3777 XNextEvent(xw.dpy, &ev);
3778 if(ev.type == ConfigureNotify) {
3779 w = ev.xconfigure.width;
3780 h = ev.xconfigure.height;
3781 } else if(ev.type == MapNotify) {
3782 break;
3783 }
3784 }
3785
3786 ttynew();
3787 if(!xw.isfixed)
3788 cresize(w, h);
3789 else
3790 cresize(xw.fw, xw.fh);
3791
3792 gettimeofday(&lastblink, NULL);
3793 gettimeofday(&last, NULL);
3794
3795 for(xev = actionfps;;) {
3796 long deltatime;
3797
3798 FD_ZERO(&rfd);
3799 FD_SET(cmdfd, &rfd);
3800 FD_SET(xfd, &rfd);
3801
3802 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
3803 if(errno == EINTR)
3804 continue;
3805 die("select failed: %s\n", SERRNO);
3806 }
3807 if(FD_ISSET(cmdfd, &rfd)) {
3808 ttyread();
3809 if(blinktimeout) {
3810 blinkset = tattrset(ATTR_BLINK);
3811 if(!blinkset)
3812 MODBIT(term.mode, 0, MODE_BLINK);
3813 }
3814 }
3815
3816 if(FD_ISSET(xfd, &rfd))
3817 xev = actionfps;
3818
3819 gettimeofday(&now, NULL);
3820 drawtimeout.tv_sec = 0;
3821 drawtimeout.tv_usec = (1000/xfps) * 1000;
3822 tv = &drawtimeout;
3823
3824 dodraw = 0;
3825 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
3826 tsetdirtattr(ATTR_BLINK);
3827 term.mode ^= MODE_BLINK;
3828 gettimeofday(&lastblink, NULL);
3829 dodraw = 1;
3830 }
3831 deltatime = TIMEDIFF(now, last);
3832 if(deltatime > (xev? (1000/xfps) : (1000/actionfps))
3833 || deltatime < 0) {
3834 dodraw = 1;
3835 last = now;
3836 }
3837
3838 if(dodraw) {
3839 while(XPending(xw.dpy)) {
3840 XNextEvent(xw.dpy, &ev);
3841 if(XFilterEvent(&ev, None))
3842 continue;
3843 if(handler[ev.type])
3844 (handler[ev.type])(&ev);
3845 }
3846
3847 draw();
3848 XFlush(xw.dpy);
3849
3850 if(xev && !FD_ISSET(xfd, &rfd))
3851 xev--;
3852 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
3853 if(blinkset) {
3854 if(TIMEDIFF(now, lastblink) \
3855 > blinktimeout) {
3856 drawtimeout.tv_usec = 1;
3857 } else {
3858 drawtimeout.tv_usec = (1000 * \
3859 (blinktimeout - \
3860 TIMEDIFF(now,
3861 lastblink)));
3862 }
3863 } else {
3864 tv = NULL;
3865 }
3866 }
3867 }
3868 }
3869 }
3870
3871 void
3872 usage(void) {
3873 die("%s " VERSION " (c) 2010-2013 st engineers\n" \
3874 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]" \
3875 " [-t title] [-w windowid] [-e command ...]\n", argv0);
3876 }
3877
3878 int
3879 main(int argc, char *argv[]) {
3880 int bitm, xr, yr;
3881 uint wr, hr;
3882 char *titles;
3883
3884 xw.fw = xw.fh = xw.fx = xw.fy = 0;
3885 xw.isfixed = False;
3886
3887 ARGBEGIN {
3888 case 'a':
3889 allowaltscreen = false;
3890 break;
3891 case 'c':
3892 opt_class = EARGF(usage());
3893 break;
3894 case 'e':
3895 /* eat all remaining arguments */
3896 if(argc > 1) {
3897 opt_cmd = &argv[1];
3898 if(argv[1] != NULL && opt_title == NULL) {
3899 titles = xstrdup(argv[1]);
3900 opt_title = basename(titles);
3901 }
3902 }
3903 goto run;
3904 case 'f':
3905 opt_font = EARGF(usage());
3906 break;
3907 case 'g':
3908 bitm = XParseGeometry(EARGF(usage()), &xr, &yr, &wr, &hr);
3909 if(bitm & XValue)
3910 xw.fx = xr;
3911 if(bitm & YValue)
3912 xw.fy = yr;
3913 if(bitm & WidthValue)
3914 xw.fw = (int)wr;
3915 if(bitm & HeightValue)
3916 xw.fh = (int)hr;
3917 if(bitm & XNegative && xw.fx == 0)
3918 xw.fx = -1;
3919 if(bitm & YNegative && xw.fy == 0)
3920 xw.fy = -1;
3921
3922 if(xw.fh != 0 && xw.fw != 0)
3923 xw.isfixed = True;
3924 break;
3925 case 'o':
3926 opt_io = EARGF(usage());
3927 break;
3928 case 't':
3929 opt_title = EARGF(usage());
3930 break;
3931 case 'w':
3932 opt_embed = EARGF(usage());
3933 break;
3934 case 'v':
3935 default:
3936 usage();
3937 } ARGEND;
3938
3939 run:
3940 setlocale(LC_CTYPE, "");
3941 XSetLocaleModifiers("");
3942 tnew(80, 24);
3943 xinit();
3944 selinit();
3945 run();
3946
3947 return 0;
3948 }
3949
simple terminal