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new utf decoder
[st.git] / st.c
1 /* See LICENSE for licence details. */
2 #include <ctype.h>
3 #include <errno.h>
4 #include <fcntl.h>
5 #include <limits.h>
6 #include <locale.h>
7 #include <pwd.h>
8 #include <stdarg.h>
9 #include <stdbool.h>
10 #include <stdio.h>
11 #include <stdlib.h>
12 #include <string.h>
13 #include <signal.h>
14 #include <stdint.h>
15 #include <sys/ioctl.h>
16 #include <sys/select.h>
17 #include <sys/stat.h>
18 #include <sys/time.h>
19 #include <sys/types.h>
20 #include <sys/wait.h>
21 #include <time.h>
22 #include <unistd.h>
23 #include <libgen.h>
24 #include <X11/Xatom.h>
25 #include <X11/Xlib.h>
26 #include <X11/Xutil.h>
27 #include <X11/cursorfont.h>
28 #include <X11/keysym.h>
29 #include <X11/Xft/Xft.h>
30 #include <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_INVALID 0xFFFD
59 #define UTF_SIZ 4
60 #define ESC_BUF_SIZ (128*UTF_SIZ)
61 #define ESC_ARG_SIZ 16
62 #define STR_BUF_SIZ ESC_BUF_SIZ
63 #define STR_ARG_SIZ ESC_ARG_SIZ
64 #define DRAW_BUF_SIZ 20*1024
65 #define XK_ANY_MOD UINT_MAX
66 #define XK_NO_MOD 0
67 #define XK_SWITCH_MOD (1<<13)
68
69 #define REDRAW_TIMEOUT (80*1000) /* 80 ms */
70
71 /* macros */
72 #define SERRNO strerror(errno)
73 #define MIN(a, b) ((a) < (b) ? (a) : (b))
74 #define MAX(a, b) ((a) < (b) ? (b) : (a))
75 #define LEN(a) (sizeof(a) / sizeof(a[0]))
76 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
77 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
78 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
79 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
80 #define IS_SET(flag) ((term.mode & (flag)) != 0)
81 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_usec-t2.tv_usec)/1000)
82 #define CEIL(x) (((x) != (int) (x)) ? (x) + 1 : (x))
83
84 #define TRUECOLOR(r,g,b) (1 << 24 | (r) << 16 | (g) << 8 | (b))
85 #define IS_TRUECOL(x) (1 << 24 & (x))
86 #define TRUERED(x) (((x) & 0xff0000) >> 8)
87 #define TRUEGREEN(x) (((x) & 0xff00))
88 #define TRUEBLUE(x) (((x) & 0xff) << 8)
89
90
91 #define VT102ID "\033[?6c"
92
93 enum glyph_attribute {
94 ATTR_NULL = 0,
95 ATTR_REVERSE = 1,
96 ATTR_UNDERLINE = 2,
97 ATTR_BOLD = 4,
98 ATTR_GFX = 8,
99 ATTR_ITALIC = 16,
100 ATTR_BLINK = 32,
101 ATTR_WRAP = 64,
102 ATTR_WIDE = 128,
103 ATTR_WDUMMY = 256,
104 };
105
106 enum cursor_movement {
107 CURSOR_SAVE,
108 CURSOR_LOAD
109 };
110
111 enum cursor_state {
112 CURSOR_DEFAULT = 0,
113 CURSOR_WRAPNEXT = 1,
114 CURSOR_ORIGIN = 2
115 };
116
117 enum term_mode {
118 MODE_WRAP = 1,
119 MODE_INSERT = 2,
120 MODE_APPKEYPAD = 4,
121 MODE_ALTSCREEN = 8,
122 MODE_CRLF = 16,
123 MODE_MOUSEBTN = 32,
124 MODE_MOUSEMOTION = 64,
125 MODE_REVERSE = 128,
126 MODE_KBDLOCK = 256,
127 MODE_HIDE = 512,
128 MODE_ECHO = 1024,
129 MODE_APPCURSOR = 2048,
130 MODE_MOUSESGR = 4096,
131 MODE_8BIT = 8192,
132 MODE_BLINK = 16384,
133 MODE_FBLINK = 32768,
134 MODE_FOCUS = 65536,
135 MODE_MOUSEX10 = 131072,
136 MODE_MOUSEMANY = 262144,
137 MODE_BRCKTPASTE = 524288,
138 MODE_PRINT = 1048576,
139 MODE_MOUSE = MODE_MOUSEBTN|MODE_MOUSEMOTION|MODE_MOUSEX10\
140 |MODE_MOUSEMANY,
141 };
142
143 enum charset {
144 CS_GRAPHIC0,
145 CS_GRAPHIC1,
146 CS_UK,
147 CS_USA,
148 CS_MULTI,
149 CS_GER,
150 CS_FIN
151 };
152
153 enum escape_state {
154 ESC_START = 1,
155 ESC_CSI = 2,
156 ESC_STR = 4, /* DSC, OSC, PM, APC */
157 ESC_ALTCHARSET = 8,
158 ESC_STR_END = 16, /* a final string was encountered */
159 ESC_TEST = 32, /* Enter in test mode */
160 };
161
162 enum window_state {
163 WIN_VISIBLE = 1,
164 WIN_REDRAW = 2,
165 WIN_FOCUSED = 4
166 };
167
168 enum selection_type {
169 SEL_REGULAR = 1,
170 SEL_RECTANGULAR = 2
171 };
172
173 enum selection_snap {
174 SNAP_WORD = 1,
175 SNAP_LINE = 2
176 };
177
178 typedef unsigned char uchar;
179 typedef unsigned int uint;
180 typedef unsigned long ulong;
181 typedef unsigned short ushort;
182
183 typedef struct {
184 char c[UTF_SIZ]; /* character code */
185 ushort mode; /* attribute flags */
186 uint32_t fg; /* foreground */
187 uint32_t bg; /* background */
188 } Glyph;
189
190 typedef Glyph *Line;
191
192 typedef struct {
193 Glyph attr; /* current char attributes */
194 int x;
195 int y;
196 char state;
197 } TCursor;
198
199 /* CSI Escape sequence structs */
200 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
201 typedef struct {
202 char buf[ESC_BUF_SIZ]; /* raw string */
203 int len; /* raw string length */
204 char priv;
205 int arg[ESC_ARG_SIZ];
206 int narg; /* nb of args */
207 char mode;
208 } CSIEscape;
209
210 /* STR Escape sequence structs */
211 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
212 typedef struct {
213 char type; /* ESC type ... */
214 char buf[STR_BUF_SIZ]; /* raw string */
215 int len; /* raw string length */
216 char *args[STR_ARG_SIZ];
217 int narg; /* nb of args */
218 } STREscape;
219
220 /* Internal representation of the screen */
221 typedef struct {
222 int row; /* nb row */
223 int col; /* nb col */
224 Line *line; /* screen */
225 Line *alt; /* alternate screen */
226 bool *dirty; /* dirtyness of lines */
227 TCursor c; /* cursor */
228 int top; /* top scroll limit */
229 int bot; /* bottom scroll limit */
230 int mode; /* terminal mode flags */
231 int esc; /* escape state flags */
232 char trantbl[4]; /* charset table translation */
233 int charset; /* current charset */
234 int icharset; /* selected charset for sequence */
235 bool numlock; /* lock numbers in keyboard */
236 bool *tabs;
237 } Term;
238
239 /* Purely graphic info */
240 typedef struct {
241 Display *dpy;
242 Colourmap cmap;
243 Window win;
244 Drawable buf;
245 Atom xembed, wmdeletewin, netwmname, netwmpid;
246 XIM xim;
247 XIC xic;
248 Draw draw;
249 Visual *vis;
250 XSetWindowAttributes attrs;
251 int scr;
252 bool isfixed; /* is fixed geometry? */
253 int fx, fy, fw, fh; /* fixed geometry */
254 int tw, th; /* tty width and height */
255 int w, h; /* window width and height */
256 int ch; /* char height */
257 int cw; /* char width */
258 char state; /* focus, redraw, visible */
259 } XWindow;
260
261 typedef struct {
262 uint b;
263 uint mask;
264 char *s;
265 } Mousekey;
266
267 typedef struct {
268 KeySym k;
269 uint mask;
270 char *s;
271 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
272 signed char appkey; /* application keypad */
273 signed char appcursor; /* application cursor */
274 signed char crlf; /* crlf mode */
275 } Key;
276
277 typedef struct {
278 int mode;
279 int type;
280 int snap;
281 /*
282 * Selection variables:
283 * nb – normalized coordinates of the beginning of the selection
284 * ne – normalized coordinates of the end of the selection
285 * ob – original coordinates of the beginning of the selection
286 * oe – original coordinates of the end of the selection
287 */
288 struct {
289 int x, y;
290 } nb, ne, ob, oe;
291
292 char *clip;
293 Atom xtarget;
294 bool alt;
295 struct timeval tclick1;
296 struct timeval tclick2;
297 } Selection;
298
299 typedef union {
300 int i;
301 unsigned int ui;
302 float f;
303 const void *v;
304 } Arg;
305
306 typedef struct {
307 unsigned int mod;
308 KeySym keysym;
309 void (*func)(const Arg *);
310 const Arg arg;
311 } Shortcut;
312
313 /* function definitions used in config.h */
314 static void clippaste(const Arg *);
315 static void numlock(const Arg *);
316 static void selpaste(const Arg *);
317 static void xzoom(const Arg *);
318 static void printsel(const Arg *);
319 static void printscreen(const Arg *) ;
320 static void toggleprinter(const Arg *);
321
322 /* Config.h for applying patches and the configuration. */
323 #include "config.h"
324
325 /* Font structure */
326 typedef struct {
327 int height;
328 int width;
329 int ascent;
330 int descent;
331 short lbearing;
332 short rbearing;
333 XftFont *match;
334 FcFontSet *set;
335 FcPattern *pattern;
336 } Font;
337
338 /* Drawing Context */
339 typedef struct {
340 Colour col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
341 Font font, bfont, ifont, ibfont;
342 GC gc;
343 } DC;
344
345 static void die(const char *, ...);
346 static void draw(void);
347 static void redraw(int);
348 static void drawregion(int, int, int, int);
349 static void execsh(void);
350 static void sigchld(int);
351 static void run(void);
352
353 static void csidump(void);
354 static void csihandle(void);
355 static void csiparse(void);
356 static void csireset(void);
357 static void strdump(void);
358 static void strhandle(void);
359 static void strparse(void);
360 static void strreset(void);
361
362 static int tattrset(int);
363 static void tprinter(char *s, size_t len);
364 static void tdumpsel(void);
365 static void tdumpline(int);
366 static void tdump(void);
367 static void tclearregion(int, int, int, int);
368 static void tcursor(int);
369 static void tdeletechar(int);
370 static void tdeleteline(int);
371 static void tinsertblank(int);
372 static void tinsertblankline(int);
373 static void tmoveto(int, int);
374 static void tmoveato(int x, int y);
375 static void tnew(int, int);
376 static void tnewline(int);
377 static void tputtab(bool);
378 static void tputc(char *, int);
379 static void treset(void);
380 static int tresize(int, int);
381 static void tscrollup(int, int);
382 static void tscrolldown(int, int);
383 static void tsetattr(int*, int);
384 static void tsetchar(char *, Glyph *, int, int);
385 static void tsetscroll(int, int);
386 static void tswapscreen(void);
387 static void tsetdirt(int, int);
388 static void tsetdirtattr(int);
389 static void tsetmode(bool, bool, int *, int);
390 static void tfulldirt(void);
391 static void techo(char *, int);
392 static int32_t tdefcolor(int *, int *, int);
393 static void tselcs(void);
394 static void tdeftran(char);
395 static inline bool match(uint, uint);
396 static void ttynew(void);
397 static void ttyread(void);
398 static void ttyresize(void);
399 static void ttysend(char *, size_t);
400 static void ttywrite(const char *, size_t);
401
402 static void xdraws(char *, Glyph, int, int, int, int);
403 static void xhints(void);
404 static void xclear(int, int, int, int);
405 static void xdrawcursor(void);
406 static void xinit(void);
407 static void xloadcols(void);
408 static int xsetcolorname(int, const char *);
409 static int xloadfont(Font *, FcPattern *);
410 static void xloadfonts(char *, double);
411 static int xloadfontset(Font *);
412 static void xsettitle(char *);
413 static void xresettitle(void);
414 static void xsetpointermotion(int);
415 static void xseturgency(int);
416 static void xsetsel(char*);
417 static void xtermclear(int, int, int, int);
418 static void xunloadfont(Font *f);
419 static void xunloadfonts(void);
420 static void xresize(int, int);
421
422 static void expose(XEvent *);
423 static void visibility(XEvent *);
424 static void unmap(XEvent *);
425 static char *kmap(KeySym, uint);
426 static void kpress(XEvent *);
427 static void cmessage(XEvent *);
428 static void cresize(int, int);
429 static void resize(XEvent *);
430 static void focus(XEvent *);
431 static void brelease(XEvent *);
432 static void bpress(XEvent *);
433 static void bmotion(XEvent *);
434 static void selnotify(XEvent *);
435 static void selclear(XEvent *);
436 static void selrequest(XEvent *);
437
438 static void selinit(void);
439 static void selsort(void);
440 static inline bool selected(int, int);
441 static char *getsel(void);
442 static void selcopy(void);
443 static void selscroll(int, int);
444 static void selsnap(int, int *, int *, int);
445
446 static size_t utf8decode(char *, long *, size_t);
447 static long utf8decodebyte(char, size_t *);
448 static size_t utf8encode(long, char *, size_t);
449 static char utf8encodebyte(long, size_t);
450 static size_t utf8len(char *);
451 static size_t utf8validate(long *, size_t);
452
453 static ssize_t xwrite(int, char *, size_t);
454 static void *xmalloc(size_t);
455 static void *xrealloc(void *, size_t);
456 static char *xstrdup(char *s);
457
458 static void (*handler[LASTEvent])(XEvent *) = {
459 [KeyPress] = kpress,
460 [ClientMessage] = cmessage,
461 [ConfigureNotify] = resize,
462 [VisibilityNotify] = visibility,
463 [UnmapNotify] = unmap,
464 [Expose] = expose,
465 [FocusIn] = focus,
466 [FocusOut] = focus,
467 [MotionNotify] = bmotion,
468 [ButtonPress] = bpress,
469 [ButtonRelease] = brelease,
470 [SelectionClear] = selclear,
471 [SelectionNotify] = selnotify,
472 [SelectionRequest] = selrequest,
473 };
474
475 /* Globals */
476 static DC dc;
477 static XWindow xw;
478 static Term term;
479 static CSIEscape csiescseq;
480 static STREscape strescseq;
481 static int cmdfd;
482 static pid_t pid;
483 static Selection sel;
484 static int iofd = STDOUT_FILENO;
485 static char **opt_cmd = NULL;
486 static char *opt_io = NULL;
487 static char *opt_title = NULL;
488 static char *opt_embed = NULL;
489 static char *opt_class = NULL;
490 static char *opt_font = NULL;
491 static int oldbutton = 3; /* button event on startup: 3 = release */
492
493 static char *usedfont = NULL;
494 static double usedfontsize = 0;
495
496 static uchar utfbyte[UTF_SIZ + 1] = {0x80, 0, 0xC0, 0xE0, 0xF0};
497 static uchar utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
498 static long utfmin[UTF_SIZ + 1] = { 0, 0, 0x80, 0x800, 0x10000};
499 static long utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
500
501 /* Font Ring Cache */
502 enum {
503 FRC_NORMAL,
504 FRC_ITALIC,
505 FRC_BOLD,
506 FRC_ITALICBOLD
507 };
508
509 typedef struct {
510 XftFont *font;
511 int flags;
512 } Fontcache;
513
514 /* Fontcache is an array now. A new font will be appended to the array. */
515 static Fontcache frc[16];
516 static int frclen = 0;
517
518 ssize_t
519 xwrite(int fd, char *s, size_t len) {
520 size_t aux = len;
521
522 while(len > 0) {
523 ssize_t r = write(fd, s, len);
524 if(r < 0)
525 return r;
526 len -= r;
527 s += r;
528 }
529 return aux;
530 }
531
532 void *
533 xmalloc(size_t len) {
534 void *p = malloc(len);
535
536 if(!p)
537 die("Out of memory\n");
538
539 return p;
540 }
541
542 void *
543 xrealloc(void *p, size_t len) {
544 if((p = realloc(p, len)) == NULL)
545 die("Out of memory\n");
546
547 return p;
548 }
549
550 char *
551 xstrdup(char *s) {
552 char *p = strdup(s);
553
554 if (!p)
555 die("Out of memory\n");
556
557 return p;
558 }
559
560 size_t
561 utf8decode(char *c, long *u, size_t clen) {
562 size_t i, j, len, type;
563 long udecoded;
564
565 *u = UTF_INVALID;
566 if(!clen)
567 return 0;
568 udecoded = utf8decodebyte(c[0], &len);
569 if(!BETWEEN(len, 1, UTF_SIZ))
570 return 1;
571 for(i = 1, j = 1; i < clen && j < len; ++i, ++j) {
572 udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
573 if(type != 0)
574 return j;
575 }
576 if(j < len)
577 return 0;
578 *u = udecoded;
579 utf8validate(u, len);
580 return len;
581 }
582
583 long
584 utf8decodebyte(char c, size_t *i) {
585 for(*i = 0; *i < LEN(utfmask); ++(*i))
586 if(((uchar)c & utfmask[*i]) == utfbyte[*i])
587 return (uchar)c & ~utfmask[*i];
588 return 0;
589 }
590
591 size_t
592 utf8encode(long u, char *c, size_t clen) {
593 size_t len, i;
594
595 len = utf8validate(&u, 0);
596 if(clen < len)
597 return 0;
598 for(i = len - 1; i != 0; --i) {
599 c[i] = utf8encodebyte(u, 0);
600 u >>= 6;
601 }
602 c[0] = utf8encodebyte(u, len);
603 return len;
604 }
605
606 char
607 utf8encodebyte(long u, size_t i) {
608 return utfbyte[i] | (u & ~utfmask[i]);
609 }
610
611 size_t
612 utf8len(char *c) {
613 return utf8decode(c, &(long){0}, UTF_SIZ);
614 }
615
616 size_t
617 utf8validate(long *u, size_t i) {
618 if(!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF))
619 *u = UTF_INVALID;
620 for(i = 1; *u > utfmax[i]; ++i)
621 ;
622 return i;
623 }
624
625 static void
626 selinit(void) {
627 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
628 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
629 sel.mode = 0;
630 sel.ob.x = -1;
631 sel.clip = NULL;
632 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
633 if(sel.xtarget == None)
634 sel.xtarget = XA_STRING;
635 }
636
637 static int
638 x2col(int x) {
639 x -= borderpx;
640 x /= xw.cw;
641
642 return LIMIT(x, 0, term.col-1);
643 }
644
645 static int
646 y2row(int y) {
647 y -= borderpx;
648 y /= xw.ch;
649
650 return LIMIT(y, 0, term.row-1);
651 }
652
653 static void
654 selsort(void) {
655 if(sel.ob.y == sel.oe.y) {
656 sel.nb.x = MIN(sel.ob.x, sel.oe.x);
657 sel.ne.x = MAX(sel.ob.x, sel.oe.x);
658 } else {
659 sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
660 sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
661 }
662 sel.nb.y = MIN(sel.ob.y, sel.oe.y);
663 sel.ne.y = MAX(sel.ob.y, sel.oe.y);
664 }
665
666 static inline bool
667 selected(int x, int y) {
668 if(sel.ne.y == y && sel.nb.y == y)
669 return BETWEEN(x, sel.nb.x, sel.ne.x);
670
671 if(sel.type == SEL_RECTANGULAR) {
672 return ((sel.nb.y <= y && y <= sel.ne.y)
673 && (sel.nb.x <= x && x <= sel.ne.x));
674 }
675
676 return ((sel.nb.y < y && y < sel.ne.y)
677 || (y == sel.ne.y && x <= sel.ne.x))
678 || (y == sel.nb.y && x >= sel.nb.x
679 && (x <= sel.ne.x || sel.nb.y != sel.ne.y));
680 }
681
682 void
683 selsnap(int mode, int *x, int *y, int direction) {
684 int i;
685
686 switch(mode) {
687 case SNAP_WORD:
688 /*
689 * Snap around if the word wraps around at the end or
690 * beginning of a line.
691 */
692 for(;;) {
693 if(direction < 0 && *x <= 0) {
694 if(*y > 0 && term.line[*y - 1][term.col-1].mode
695 & ATTR_WRAP) {
696 *y -= 1;
697 *x = term.col-1;
698 } else {
699 break;
700 }
701 }
702 if(direction > 0 && *x >= term.col-1) {
703 if(*y < term.row-1 && term.line[*y][*x].mode
704 & ATTR_WRAP) {
705 *y += 1;
706 *x = 0;
707 } else {
708 break;
709 }
710 }
711
712 if(term.line[*y][*x+direction].mode & ATTR_WDUMMY) {
713 *x += direction;
714 continue;
715 }
716
717 if(strchr(worddelimiters,
718 term.line[*y][*x+direction].c[0])) {
719 break;
720 }
721
722 *x += direction;
723 }
724 break;
725 case SNAP_LINE:
726 /*
727 * Snap around if the the previous line or the current one
728 * has set ATTR_WRAP at its end. Then the whole next or
729 * previous line will be selected.
730 */
731 *x = (direction < 0) ? 0 : term.col - 1;
732 if(direction < 0 && *y > 0) {
733 for(; *y > 0; *y += direction) {
734 if(!(term.line[*y-1][term.col-1].mode
735 & ATTR_WRAP)) {
736 break;
737 }
738 }
739 } else if(direction > 0 && *y < term.row-1) {
740 for(; *y < term.row; *y += direction) {
741 if(!(term.line[*y][term.col-1].mode
742 & ATTR_WRAP)) {
743 break;
744 }
745 }
746 }
747 break;
748 default:
749 /*
750 * Select the whole line when the end of line is reached.
751 */
752 if(direction > 0) {
753 i = term.col;
754 while(--i > 0 && term.line[*y][i].c[0] == ' ')
755 /* nothing */;
756 if(i > 0 && i < *x)
757 *x = term.col - 1;
758 }
759 break;
760 }
761 }
762
763 void
764 getbuttoninfo(XEvent *e) {
765 int type;
766 uint state = e->xbutton.state &~Button1Mask;
767
768 sel.alt = IS_SET(MODE_ALTSCREEN);
769
770 sel.oe.x = x2col(e->xbutton.x);
771 sel.oe.y = y2row(e->xbutton.y);
772
773 if(sel.ob.y < sel.oe.y
774 || (sel.ob.y == sel.oe.y && sel.ob.x < sel.oe.x)) {
775 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
776 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
777 } else {
778 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, -1);
779 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, +1);
780 }
781 selsort();
782
783 sel.type = SEL_REGULAR;
784 for(type = 1; type < LEN(selmasks); ++type) {
785 if(match(selmasks[type], state)) {
786 sel.type = type;
787 break;
788 }
789 }
790 }
791
792 void
793 mousereport(XEvent *e) {
794 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
795 button = e->xbutton.button, state = e->xbutton.state,
796 len;
797 char buf[40];
798 static int ox, oy;
799
800 /* from urxvt */
801 if(e->xbutton.type == MotionNotify) {
802 if(x == ox && y == oy)
803 return;
804 if(!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
805 return;
806 /* MOUSE_MOTION: no reporting if no button is pressed */
807 if(IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
808 return;
809
810 button = oldbutton + 32;
811 ox = x;
812 oy = y;
813 } else {
814 if(!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
815 button = 3;
816 } else {
817 button -= Button1;
818 if(button >= 3)
819 button += 64 - 3;
820 }
821 if(e->xbutton.type == ButtonPress) {
822 oldbutton = button;
823 ox = x;
824 oy = y;
825 } else if(e->xbutton.type == ButtonRelease) {
826 oldbutton = 3;
827 /* MODE_MOUSEX10: no button release reporting */
828 if(IS_SET(MODE_MOUSEX10))
829 return;
830 }
831 }
832
833 if(!IS_SET(MODE_MOUSEX10)) {
834 button += (state & ShiftMask ? 4 : 0)
835 + (state & Mod4Mask ? 8 : 0)
836 + (state & ControlMask ? 16 : 0);
837 }
838
839 len = 0;
840 if(IS_SET(MODE_MOUSESGR)) {
841 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
842 button, x+1, y+1,
843 e->xbutton.type == ButtonRelease ? 'm' : 'M');
844 } else if(x < 223 && y < 223) {
845 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
846 32+button, 32+x+1, 32+y+1);
847 } else {
848 return;
849 }
850
851 ttywrite(buf, len);
852 }
853
854 void
855 bpress(XEvent *e) {
856 struct timeval now;
857 Mousekey *mk;
858
859 if(IS_SET(MODE_MOUSE)) {
860 mousereport(e);
861 return;
862 }
863
864 for(mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
865 if(e->xbutton.button == mk->b
866 && match(mk->mask, e->xbutton.state)) {
867 ttysend(mk->s, strlen(mk->s));
868 return;
869 }
870 }
871
872 if(e->xbutton.button == Button1) {
873 gettimeofday(&now, NULL);
874
875 /* Clear previous selection, logically and visually. */
876 selclear(NULL);
877 sel.mode = 1;
878 sel.type = SEL_REGULAR;
879 sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
880 sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
881
882 /*
883 * If the user clicks below predefined timeouts specific
884 * snapping behaviour is exposed.
885 */
886 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
887 sel.snap = SNAP_LINE;
888 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
889 sel.snap = SNAP_WORD;
890 } else {
891 sel.snap = 0;
892 }
893 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
894 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
895 selsort();
896
897 /*
898 * Draw selection, unless it's regular and we don't want to
899 * make clicks visible
900 */
901 if(sel.snap != 0) {
902 sel.mode++;
903 tsetdirt(sel.nb.y, sel.ne.y);
904 }
905 sel.tclick2 = sel.tclick1;
906 sel.tclick1 = now;
907 }
908 }
909
910 char *
911 getsel(void) {
912 char *str, *ptr;
913 int x, y, bufsize, size, i, ex;
914 Glyph *gp, *last;
915
916 if(sel.ob.x == -1) {
917 str = NULL;
918 } else {
919 bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
920 ptr = str = xmalloc(bufsize);
921
922 /* append every set & selected glyph to the selection */
923 for(y = sel.nb.y; y < sel.ne.y + 1; y++) {
924 gp = &term.line[y][0];
925 last = &gp[term.col-1];
926
927 while(last >= gp && !(selected(last - gp, y) &&
928 strcmp(last->c, " ") != 0)) {
929 --last;
930 }
931
932 for(x = 0; gp <= last; x++, ++gp) {
933 if(!selected(x, y) || (gp->mode & ATTR_WDUMMY))
934 continue;
935
936 size = utf8len(gp->c);
937 memcpy(ptr, gp->c, size);
938 ptr += size;
939 }
940
941 /*
942 * Copy and pasting of line endings is inconsistent
943 * in the inconsistent terminal and GUI world.
944 * The best solution seems like to produce '\n' when
945 * something is copied from st and convert '\n' to
946 * '\r', when something to be pasted is received by
947 * st.
948 * FIXME: Fix the computer world.
949 */
950 if(y < sel.ne.y && x > 0 && !((gp-1)->mode & ATTR_WRAP))
951 *ptr++ = '\n';
952
953 /*
954 * If the last selected line expands in the selection
955 * after the visible text '\n' is appended.
956 */
957 if(y == sel.ne.y) {
958 i = term.col;
959 while(--i > 0 && term.line[y][i].c[0] == ' ')
960 /* nothing */;
961 ex = sel.ne.x;
962 if(sel.nb.y == sel.ne.y && sel.ne.x < sel.nb.x)
963 ex = sel.nb.x;
964 if(i < ex)
965 *ptr++ = '\n';
966 }
967 }
968 *ptr = 0;
969 }
970 return str;
971 }
972
973 void
974 selcopy(void) {
975 xsetsel(getsel());
976 }
977
978 void
979 selnotify(XEvent *e) {
980 ulong nitems, ofs, rem;
981 int format;
982 uchar *data, *last, *repl;
983 Atom type;
984
985 ofs = 0;
986 do {
987 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
988 False, AnyPropertyType, &type, &format,
989 &nitems, &rem, &data)) {
990 fprintf(stderr, "Clipboard allocation failed\n");
991 return;
992 }
993
994 /*
995 * As seen in selcopy:
996 * Line endings are inconsistent in the terminal and GUI world
997 * copy and pasting. When receiving some selection data,
998 * replace all '\n' with '\r'.
999 * FIXME: Fix the computer world.
1000 */
1001 repl = data;
1002 last = data + nitems * format / 8;
1003 while((repl = memchr(repl, '\n', last - repl))) {
1004 *repl++ = '\r';
1005 }
1006
1007 if(IS_SET(MODE_BRCKTPASTE))
1008 ttywrite("\033[200~", 6);
1009 ttysend((char *)data, nitems * format / 8);
1010 if(IS_SET(MODE_BRCKTPASTE))
1011 ttywrite("\033[201~", 6);
1012 XFree(data);
1013 /* number of 32-bit chunks returned */
1014 ofs += nitems * format / 32;
1015 } while(rem > 0);
1016 }
1017
1018 void
1019 selpaste(const Arg *dummy) {
1020 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
1021 xw.win, CurrentTime);
1022 }
1023
1024 void
1025 clippaste(const Arg *dummy) {
1026 Atom clipboard;
1027
1028 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1029 XConvertSelection(xw.dpy, clipboard, sel.xtarget, XA_PRIMARY,
1030 xw.win, CurrentTime);
1031 }
1032
1033 void
1034 selclear(XEvent *e) {
1035 if(sel.ob.x == -1)
1036 return;
1037 sel.ob.x = -1;
1038 tsetdirt(sel.nb.y, sel.ne.y);
1039 }
1040
1041 void
1042 selrequest(XEvent *e) {
1043 XSelectionRequestEvent *xsre;
1044 XSelectionEvent xev;
1045 Atom xa_targets, string;
1046
1047 xsre = (XSelectionRequestEvent *) e;
1048 xev.type = SelectionNotify;
1049 xev.requestor = xsre->requestor;
1050 xev.selection = xsre->selection;
1051 xev.target = xsre->target;
1052 xev.time = xsre->time;
1053 /* reject */
1054 xev.property = None;
1055
1056 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
1057 if(xsre->target == xa_targets) {
1058 /* respond with the supported type */
1059 string = sel.xtarget;
1060 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1061 XA_ATOM, 32, PropModeReplace,
1062 (uchar *) &string, 1);
1063 xev.property = xsre->property;
1064 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
1065 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1066 xsre->target, 8, PropModeReplace,
1067 (uchar *) sel.clip, strlen(sel.clip));
1068 xev.property = xsre->property;
1069 }
1070
1071 /* all done, send a notification to the listener */
1072 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
1073 fprintf(stderr, "Error sending SelectionNotify event\n");
1074 }
1075
1076 void
1077 xsetsel(char *str) {
1078 /* register the selection for both the clipboard and the primary */
1079 Atom clipboard;
1080
1081 free(sel.clip);
1082 sel.clip = str;
1083
1084 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
1085
1086 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1087 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
1088 }
1089
1090 void
1091 brelease(XEvent *e) {
1092 if(IS_SET(MODE_MOUSE)) {
1093 mousereport(e);
1094 return;
1095 }
1096
1097 if(e->xbutton.button == Button2) {
1098 selpaste(NULL);
1099 } else if(e->xbutton.button == Button1) {
1100 if(sel.mode < 2) {
1101 selclear(NULL);
1102 } else {
1103 getbuttoninfo(e);
1104 selcopy();
1105 }
1106 sel.mode = 0;
1107 tsetdirt(sel.nb.y, sel.ne.y);
1108 }
1109 }
1110
1111 void
1112 bmotion(XEvent *e) {
1113 int oldey, oldex, oldsby, oldsey;
1114
1115 if(IS_SET(MODE_MOUSE)) {
1116 mousereport(e);
1117 return;
1118 }
1119
1120 if(!sel.mode)
1121 return;
1122
1123 sel.mode++;
1124 oldey = sel.oe.y;
1125 oldex = sel.oe.x;
1126 oldsby = sel.nb.y;
1127 oldsey = sel.ne.y;
1128 getbuttoninfo(e);
1129
1130 if(oldey != sel.oe.y || oldex != sel.oe.x)
1131 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
1132 }
1133
1134 void
1135 die(const char *errstr, ...) {
1136 va_list ap;
1137
1138 va_start(ap, errstr);
1139 vfprintf(stderr, errstr, ap);
1140 va_end(ap);
1141 exit(EXIT_FAILURE);
1142 }
1143
1144 void
1145 execsh(void) {
1146 char **args;
1147 char *envshell = getenv("SHELL");
1148 const struct passwd *pass = getpwuid(getuid());
1149 char buf[sizeof(long) * 8 + 1];
1150
1151 unsetenv("COLUMNS");
1152 unsetenv("LINES");
1153 unsetenv("TERMCAP");
1154
1155 if(pass) {
1156 setenv("LOGNAME", pass->pw_name, 1);
1157 setenv("USER", pass->pw_name, 1);
1158 setenv("SHELL", pass->pw_shell, 0);
1159 setenv("HOME", pass->pw_dir, 0);
1160 }
1161
1162 snprintf(buf, sizeof(buf), "%lu", xw.win);
1163 setenv("WINDOWID", buf, 1);
1164
1165 signal(SIGCHLD, SIG_DFL);
1166 signal(SIGHUP, SIG_DFL);
1167 signal(SIGINT, SIG_DFL);
1168 signal(SIGQUIT, SIG_DFL);
1169 signal(SIGTERM, SIG_DFL);
1170 signal(SIGALRM, SIG_DFL);
1171
1172 DEFAULT(envshell, shell);
1173 setenv("TERM", termname, 1);
1174 args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
1175 execvp(args[0], args);
1176 exit(EXIT_FAILURE);
1177 }
1178
1179 void
1180 sigchld(int a) {
1181 int stat = 0;
1182
1183 if(waitpid(pid, &stat, 0) < 0)
1184 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
1185
1186 if(WIFEXITED(stat)) {
1187 exit(WEXITSTATUS(stat));
1188 } else {
1189 exit(EXIT_FAILURE);
1190 }
1191 }
1192
1193 void
1194 ttynew(void) {
1195 int m, s;
1196 struct winsize w = {term.row, term.col, 0, 0};
1197
1198 /* seems to work fine on linux, openbsd and freebsd */
1199 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1200 die("openpty failed: %s\n", SERRNO);
1201
1202 switch(pid = fork()) {
1203 case -1:
1204 die("fork failed\n");
1205 break;
1206 case 0:
1207 setsid(); /* create a new process group */
1208 dup2(s, STDIN_FILENO);
1209 dup2(s, STDOUT_FILENO);
1210 dup2(s, STDERR_FILENO);
1211 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1212 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
1213 close(s);
1214 close(m);
1215 execsh();
1216 break;
1217 default:
1218 close(s);
1219 cmdfd = m;
1220 signal(SIGCHLD, sigchld);
1221 if(opt_io) {
1222 term.mode |= MODE_PRINT;
1223 iofd = (!strcmp(opt_io, "-")) ?
1224 STDOUT_FILENO :
1225 open(opt_io, O_WRONLY | O_CREAT, 0666);
1226 if(iofd < 0) {
1227 fprintf(stderr, "Error opening %s:%s\n",
1228 opt_io, strerror(errno));
1229 }
1230 }
1231 }
1232 }
1233
1234 void
1235 dump(char c) {
1236 static int col;
1237
1238 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
1239 if(++col % 10 == 0)
1240 fprintf(stderr, "\n");
1241 }
1242
1243 void
1244 ttyread(void) {
1245 static char buf[BUFSIZ];
1246 static int buflen = 0;
1247 char *ptr;
1248 char s[UTF_SIZ];
1249 int charsize; /* size of utf8 char in bytes */
1250 long unicodep;
1251 int ret;
1252
1253 /* append read bytes to unprocessed bytes */
1254 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1255 die("Couldn't read from shell: %s\n", SERRNO);
1256
1257 /* process every complete utf8 char */
1258 buflen += ret;
1259 ptr = buf;
1260 while(charsize = utf8decode(ptr, &unicodep, buflen)) {
1261 utf8encode(unicodep, s, UTF_SIZ);
1262 tputc(s, charsize);
1263 ptr += charsize;
1264 buflen -= charsize;
1265 }
1266
1267 /* keep any uncomplete utf8 char for the next call */
1268 memmove(buf, ptr, buflen);
1269 }
1270
1271 void
1272 ttywrite(const char *s, size_t n) {
1273 if(write(cmdfd, s, n) == -1)
1274 die("write error on tty: %s\n", SERRNO);
1275 }
1276
1277 void
1278 ttysend(char *s, size_t n) {
1279 ttywrite(s, n);
1280 if(IS_SET(MODE_ECHO))
1281 techo(s, n);
1282 }
1283
1284 void
1285 ttyresize(void) {
1286 struct winsize w;
1287
1288 w.ws_row = term.row;
1289 w.ws_col = term.col;
1290 w.ws_xpixel = xw.tw;
1291 w.ws_ypixel = xw.th;
1292 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1293 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
1294 }
1295
1296 int
1297 tattrset(int attr) {
1298 int i, j;
1299
1300 for(i = 0; i < term.row-1; i++) {
1301 for(j = 0; j < term.col-1; j++) {
1302 if(term.line[i][j].mode & attr)
1303 return 1;
1304 }
1305 }
1306
1307 return 0;
1308 }
1309
1310 void
1311 tsetdirt(int top, int bot) {
1312 int i;
1313
1314 LIMIT(top, 0, term.row-1);
1315 LIMIT(bot, 0, term.row-1);
1316
1317 for(i = top; i <= bot; i++)
1318 term.dirty[i] = 1;
1319 }
1320
1321 void
1322 tsetdirtattr(int attr) {
1323 int i, j;
1324
1325 for(i = 0; i < term.row-1; i++) {
1326 for(j = 0; j < term.col-1; j++) {
1327 if(term.line[i][j].mode & attr) {
1328 tsetdirt(i, i);
1329 break;
1330 }
1331 }
1332 }
1333 }
1334
1335 void
1336 tfulldirt(void) {
1337 tsetdirt(0, term.row-1);
1338 }
1339
1340 void
1341 tcursor(int mode) {
1342 static TCursor c[2];
1343 bool alt = IS_SET(MODE_ALTSCREEN);
1344
1345 if(mode == CURSOR_SAVE) {
1346 c[alt] = term.c;
1347 } else if(mode == CURSOR_LOAD) {
1348 term.c = c[alt];
1349 tmoveto(c[alt].x, c[alt].y);
1350 }
1351 }
1352
1353 void
1354 treset(void) {
1355 uint i;
1356
1357 term.c = (TCursor){{
1358 .mode = ATTR_NULL,
1359 .fg = defaultfg,
1360 .bg = defaultbg
1361 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1362
1363 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1364 for(i = tabspaces; i < term.col; i += tabspaces)
1365 term.tabs[i] = 1;
1366 term.top = 0;
1367 term.bot = term.row - 1;
1368 term.mode = MODE_WRAP;
1369 memset(term.trantbl, sizeof(term.trantbl), CS_USA);
1370 term.charset = 0;
1371
1372 tclearregion(0, 0, term.col-1, term.row-1);
1373 tmoveto(0, 0);
1374 tcursor(CURSOR_SAVE);
1375 }
1376
1377 void
1378 tnew(int col, int row) {
1379 term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } };
1380 tresize(col, row);
1381 term.numlock = 1;
1382
1383 treset();
1384 }
1385
1386 void
1387 tswapscreen(void) {
1388 Line *tmp = term.line;
1389
1390 term.line = term.alt;
1391 term.alt = tmp;
1392 term.mode ^= MODE_ALTSCREEN;
1393 tfulldirt();
1394 }
1395
1396 void
1397 tscrolldown(int orig, int n) {
1398 int i;
1399 Line temp;
1400
1401 LIMIT(n, 0, term.bot-orig+1);
1402
1403 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1404
1405 for(i = term.bot; i >= orig+n; i--) {
1406 temp = term.line[i];
1407 term.line[i] = term.line[i-n];
1408 term.line[i-n] = temp;
1409
1410 term.dirty[i] = 1;
1411 term.dirty[i-n] = 1;
1412 }
1413
1414 selscroll(orig, n);
1415 }
1416
1417 void
1418 tscrollup(int orig, int n) {
1419 int i;
1420 Line temp;
1421 LIMIT(n, 0, term.bot-orig+1);
1422
1423 tclearregion(0, orig, term.col-1, orig+n-1);
1424
1425 for(i = orig; i <= term.bot-n; i++) {
1426 temp = term.line[i];
1427 term.line[i] = term.line[i+n];
1428 term.line[i+n] = temp;
1429
1430 term.dirty[i] = 1;
1431 term.dirty[i+n] = 1;
1432 }
1433
1434 selscroll(orig, -n);
1435 }
1436
1437 void
1438 selscroll(int orig, int n) {
1439 if(sel.ob.x == -1)
1440 return;
1441
1442 if(BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
1443 if((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
1444 selclear(NULL);
1445 return;
1446 }
1447 if(sel.type == SEL_RECTANGULAR) {
1448 if(sel.ob.y < term.top)
1449 sel.ob.y = term.top;
1450 if(sel.oe.y > term.bot)
1451 sel.oe.y = term.bot;
1452 } else {
1453 if(sel.ob.y < term.top) {
1454 sel.ob.y = term.top;
1455 sel.ob.x = 0;
1456 }
1457 if(sel.oe.y > term.bot) {
1458 sel.oe.y = term.bot;
1459 sel.oe.x = term.col;
1460 }
1461 }
1462 selsort();
1463 }
1464 }
1465
1466 void
1467 tnewline(int first_col) {
1468 int y = term.c.y;
1469
1470 if(y == term.bot) {
1471 tscrollup(term.top, 1);
1472 } else {
1473 y++;
1474 }
1475 tmoveto(first_col ? 0 : term.c.x, y);
1476 }
1477
1478 void
1479 csiparse(void) {
1480 char *p = csiescseq.buf, *np;
1481 long int v;
1482
1483 csiescseq.narg = 0;
1484 if(*p == '?') {
1485 csiescseq.priv = 1;
1486 p++;
1487 }
1488
1489 csiescseq.buf[csiescseq.len] = '\0';
1490 while(p < csiescseq.buf+csiescseq.len) {
1491 np = NULL;
1492 v = strtol(p, &np, 10);
1493 if(np == p)
1494 v = 0;
1495 if(v == LONG_MAX || v == LONG_MIN)
1496 v = -1;
1497 csiescseq.arg[csiescseq.narg++] = v;
1498 p = np;
1499 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1500 break;
1501 p++;
1502 }
1503 csiescseq.mode = *p;
1504 }
1505
1506 /* for absolute user moves, when decom is set */
1507 void
1508 tmoveato(int x, int y) {
1509 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1510 }
1511
1512 void
1513 tmoveto(int x, int y) {
1514 int miny, maxy;
1515
1516 if(term.c.state & CURSOR_ORIGIN) {
1517 miny = term.top;
1518 maxy = term.bot;
1519 } else {
1520 miny = 0;
1521 maxy = term.row - 1;
1522 }
1523 LIMIT(x, 0, term.col-1);
1524 LIMIT(y, miny, maxy);
1525 term.c.state &= ~CURSOR_WRAPNEXT;
1526 term.c.x = x;
1527 term.c.y = y;
1528 }
1529
1530 void
1531 tsetchar(char *c, Glyph *attr, int x, int y) {
1532 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1533 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1534 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1535 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1536 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1537 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1538 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1539 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1540 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1541 };
1542
1543 /*
1544 * The table is proudly stolen from rxvt.
1545 */
1546 if(attr->mode & ATTR_GFX) {
1547 if(c[0] >= 0x41 && c[0] <= 0x7e
1548 && vt100_0[c[0] - 0x41]) {
1549 c = vt100_0[c[0] - 0x41];
1550 }
1551 }
1552
1553 if(term.line[y][x].mode & ATTR_WIDE) {
1554 if(x+1 < term.col) {
1555 term.line[y][x+1].c[0] = ' ';
1556 term.line[y][x+1].mode &= ~ATTR_WDUMMY;
1557 }
1558 } else if(term.line[y][x].mode & ATTR_WDUMMY) {
1559 term.line[y][x-1].c[0] = ' ';
1560 term.line[y][x-1].mode &= ~ATTR_WIDE;
1561 }
1562
1563 term.dirty[y] = 1;
1564 term.line[y][x] = *attr;
1565 memcpy(term.line[y][x].c, c, UTF_SIZ);
1566 }
1567
1568 void
1569 tclearregion(int x1, int y1, int x2, int y2) {
1570 int x, y, temp;
1571
1572 if(x1 > x2)
1573 temp = x1, x1 = x2, x2 = temp;
1574 if(y1 > y2)
1575 temp = y1, y1 = y2, y2 = temp;
1576
1577 LIMIT(x1, 0, term.col-1);
1578 LIMIT(x2, 0, term.col-1);
1579 LIMIT(y1, 0, term.row-1);
1580 LIMIT(y2, 0, term.row-1);
1581
1582 for(y = y1; y <= y2; y++) {
1583 term.dirty[y] = 1;
1584 for(x = x1; x <= x2; x++) {
1585 if(selected(x, y))
1586 selclear(NULL);
1587 term.line[y][x] = term.c.attr;
1588 memcpy(term.line[y][x].c, " ", 2);
1589 }
1590 }
1591 }
1592
1593 void
1594 tdeletechar(int n) {
1595 int src = term.c.x + n;
1596 int dst = term.c.x;
1597 int size = term.col - src;
1598
1599 term.dirty[term.c.y] = 1;
1600
1601 if(src >= term.col) {
1602 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1603 return;
1604 }
1605
1606 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1607 size * sizeof(Glyph));
1608 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1609 }
1610
1611 void
1612 tinsertblank(int n) {
1613 int src = term.c.x;
1614 int dst = src + n;
1615 int size = term.col - dst;
1616
1617 term.dirty[term.c.y] = 1;
1618
1619 if(dst >= term.col) {
1620 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1621 return;
1622 }
1623
1624 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1625 size * sizeof(Glyph));
1626 tclearregion(src, term.c.y, dst - 1, term.c.y);
1627 }
1628
1629 void
1630 tinsertblankline(int n) {
1631 if(term.c.y < term.top || term.c.y > term.bot)
1632 return;
1633
1634 tscrolldown(term.c.y, n);
1635 }
1636
1637 void
1638 tdeleteline(int n) {
1639 if(term.c.y < term.top || term.c.y > term.bot)
1640 return;
1641
1642 tscrollup(term.c.y, n);
1643 }
1644
1645 int32_t
1646 tdefcolor(int *attr, int *npar, int l) {
1647 int32_t idx = -1;
1648 uint r, g, b;
1649
1650 switch (attr[*npar + 1]) {
1651 case 2: /* direct colour in RGB space */
1652 if (*npar + 4 >= l) {
1653 fprintf(stderr,
1654 "erresc(38): Incorrect number of parameters (%d)\n",
1655 *npar);
1656 break;
1657 }
1658 r = attr[*npar + 2];
1659 g = attr[*npar + 3];
1660 b = attr[*npar + 4];
1661 *npar += 4;
1662 if(!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
1663 fprintf(stderr, "erresc: bad rgb color (%d,%d,%d)\n",
1664 r, g, b);
1665 else
1666 idx = TRUECOLOR(r, g, b);
1667 break;
1668 case 5: /* indexed colour */
1669 if (*npar + 2 >= l) {
1670 fprintf(stderr,
1671 "erresc(38): Incorrect number of parameters (%d)\n",
1672 *npar);
1673 break;
1674 }
1675 *npar += 2;
1676 if(!BETWEEN(attr[*npar], 0, 255))
1677 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
1678 else
1679 idx = attr[*npar];
1680 break;
1681 case 0: /* implemented defined (only foreground) */
1682 case 1: /* transparent */
1683 case 3: /* direct colour in CMY space */
1684 case 4: /* direct colour in CMYK space */
1685 default:
1686 fprintf(stderr,
1687 "erresc(38): gfx attr %d unknown\n", attr[*npar]);
1688 }
1689
1690 return idx;
1691 }
1692
1693 void
1694 tsetattr(int *attr, int l) {
1695 int i;
1696 int32_t idx;
1697
1698 for(i = 0; i < l; i++) {
1699 switch(attr[i]) {
1700 case 0:
1701 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE \
1702 | ATTR_BOLD | ATTR_ITALIC \
1703 | ATTR_BLINK);
1704 term.c.attr.fg = defaultfg;
1705 term.c.attr.bg = defaultbg;
1706 break;
1707 case 1:
1708 term.c.attr.mode |= ATTR_BOLD;
1709 break;
1710 case 3:
1711 term.c.attr.mode |= ATTR_ITALIC;
1712 break;
1713 case 4:
1714 term.c.attr.mode |= ATTR_UNDERLINE;
1715 break;
1716 case 5: /* slow blink */
1717 case 6: /* rapid blink */
1718 term.c.attr.mode |= ATTR_BLINK;
1719 break;
1720 case 7:
1721 term.c.attr.mode |= ATTR_REVERSE;
1722 break;
1723 case 21:
1724 case 22:
1725 term.c.attr.mode &= ~ATTR_BOLD;
1726 break;
1727 case 23:
1728 term.c.attr.mode &= ~ATTR_ITALIC;
1729 break;
1730 case 24:
1731 term.c.attr.mode &= ~ATTR_UNDERLINE;
1732 break;
1733 case 25:
1734 case 26:
1735 term.c.attr.mode &= ~ATTR_BLINK;
1736 break;
1737 case 27:
1738 term.c.attr.mode &= ~ATTR_REVERSE;
1739 break;
1740 case 38:
1741 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1742 term.c.attr.fg = idx;
1743 break;
1744 case 39:
1745 term.c.attr.fg = defaultfg;
1746 break;
1747 case 48:
1748 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1749 term.c.attr.bg = idx;
1750 break;
1751 case 49:
1752 term.c.attr.bg = defaultbg;
1753 break;
1754 default:
1755 if(BETWEEN(attr[i], 30, 37)) {
1756 term.c.attr.fg = attr[i] - 30;
1757 } else if(BETWEEN(attr[i], 40, 47)) {
1758 term.c.attr.bg = attr[i] - 40;
1759 } else if(BETWEEN(attr[i], 90, 97)) {
1760 term.c.attr.fg = attr[i] - 90 + 8;
1761 } else if(BETWEEN(attr[i], 100, 107)) {
1762 term.c.attr.bg = attr[i] - 100 + 8;
1763 } else {
1764 fprintf(stderr,
1765 "erresc(default): gfx attr %d unknown\n",
1766 attr[i]), csidump();
1767 }
1768 break;
1769 }
1770 }
1771 }
1772
1773 void
1774 tsetscroll(int t, int b) {
1775 int temp;
1776
1777 LIMIT(t, 0, term.row-1);
1778 LIMIT(b, 0, term.row-1);
1779 if(t > b) {
1780 temp = t;
1781 t = b;
1782 b = temp;
1783 }
1784 term.top = t;
1785 term.bot = b;
1786 }
1787
1788 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1789
1790 void
1791 tsetmode(bool priv, bool set, int *args, int narg) {
1792 int *lim, mode;
1793 bool alt;
1794
1795 for(lim = args + narg; args < lim; ++args) {
1796 if(priv) {
1797 switch(*args) {
1798 break;
1799 case 1: /* DECCKM -- Cursor key */
1800 MODBIT(term.mode, set, MODE_APPCURSOR);
1801 break;
1802 case 5: /* DECSCNM -- Reverse video */
1803 mode = term.mode;
1804 MODBIT(term.mode, set, MODE_REVERSE);
1805 if(mode != term.mode)
1806 redraw(REDRAW_TIMEOUT);
1807 break;
1808 case 6: /* DECOM -- Origin */
1809 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1810 tmoveato(0, 0);
1811 break;
1812 case 7: /* DECAWM -- Auto wrap */
1813 MODBIT(term.mode, set, MODE_WRAP);
1814 break;
1815 case 0: /* Error (IGNORED) */
1816 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1817 case 3: /* DECCOLM -- Column (IGNORED) */
1818 case 4: /* DECSCLM -- Scroll (IGNORED) */
1819 case 8: /* DECARM -- Auto repeat (IGNORED) */
1820 case 18: /* DECPFF -- Printer feed (IGNORED) */
1821 case 19: /* DECPEX -- Printer extent (IGNORED) */
1822 case 42: /* DECNRCM -- National characters (IGNORED) */
1823 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1824 break;
1825 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1826 MODBIT(term.mode, !set, MODE_HIDE);
1827 break;
1828 case 9: /* X10 mouse compatibility mode */
1829 xsetpointermotion(0);
1830 MODBIT(term.mode, 0, MODE_MOUSE);
1831 MODBIT(term.mode, set, MODE_MOUSEX10);
1832 break;
1833 case 1000: /* 1000: report button press */
1834 xsetpointermotion(0);
1835 MODBIT(term.mode, 0, MODE_MOUSE);
1836 MODBIT(term.mode, set, MODE_MOUSEBTN);
1837 break;
1838 case 1002: /* 1002: report motion on button press */
1839 xsetpointermotion(0);
1840 MODBIT(term.mode, 0, MODE_MOUSE);
1841 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1842 break;
1843 case 1003: /* 1003: enable all mouse motions */
1844 xsetpointermotion(set);
1845 MODBIT(term.mode, 0, MODE_MOUSE);
1846 MODBIT(term.mode, set, MODE_MOUSEMANY);
1847 break;
1848 case 1004: /* 1004: send focus events to tty */
1849 MODBIT(term.mode, set, MODE_FOCUS);
1850 break;
1851 case 1006: /* 1006: extended reporting mode */
1852 MODBIT(term.mode, set, MODE_MOUSESGR);
1853 break;
1854 case 1034:
1855 MODBIT(term.mode, set, MODE_8BIT);
1856 break;
1857 case 1049: /* swap screen & set/restore cursor as xterm */
1858 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1859 case 47: /* swap screen */
1860 case 1047:
1861 if (!allowaltscreen)
1862 break;
1863 alt = IS_SET(MODE_ALTSCREEN);
1864 if(alt) {
1865 tclearregion(0, 0, term.col-1,
1866 term.row-1);
1867 }
1868 if(set ^ alt) /* set is always 1 or 0 */
1869 tswapscreen();
1870 if(*args != 1049)
1871 break;
1872 /* FALLTRU */
1873 case 1048:
1874 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1875 break;
1876 case 2004: /* 2004: bracketed paste mode */
1877 MODBIT(term.mode, set, MODE_BRCKTPASTE);
1878 break;
1879 /* Not implemented mouse modes. See comments there. */
1880 case 1001: /* mouse highlight mode; can hang the
1881 terminal by design when implemented. */
1882 case 1005: /* UTF-8 mouse mode; will confuse
1883 applications not supporting UTF-8
1884 and luit. */
1885 case 1015: /* urxvt mangled mouse mode; incompatible
1886 and can be mistaken for other control
1887 codes. */
1888 default:
1889 fprintf(stderr,
1890 "erresc: unknown private set/reset mode %d\n",
1891 *args);
1892 break;
1893 }
1894 } else {
1895 switch(*args) {
1896 case 0: /* Error (IGNORED) */
1897 break;
1898 case 2: /* KAM -- keyboard action */
1899 MODBIT(term.mode, set, MODE_KBDLOCK);
1900 break;
1901 case 4: /* IRM -- Insertion-replacement */
1902 MODBIT(term.mode, set, MODE_INSERT);
1903 break;
1904 case 12: /* SRM -- Send/Receive */
1905 MODBIT(term.mode, !set, MODE_ECHO);
1906 break;
1907 case 20: /* LNM -- Linefeed/new line */
1908 MODBIT(term.mode, set, MODE_CRLF);
1909 break;
1910 default:
1911 fprintf(stderr,
1912 "erresc: unknown set/reset mode %d\n",
1913 *args);
1914 break;
1915 }
1916 }
1917 }
1918 }
1919
1920 void
1921 csihandle(void) {
1922 char buf[40];
1923 int len;
1924
1925 switch(csiescseq.mode) {
1926 default:
1927 unknown:
1928 fprintf(stderr, "erresc: unknown csi ");
1929 csidump();
1930 /* die(""); */
1931 break;
1932 case '@': /* ICH -- Insert <n> blank char */
1933 DEFAULT(csiescseq.arg[0], 1);
1934 tinsertblank(csiescseq.arg[0]);
1935 break;
1936 case 'A': /* CUU -- Cursor <n> Up */
1937 DEFAULT(csiescseq.arg[0], 1);
1938 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1939 break;
1940 case 'B': /* CUD -- Cursor <n> Down */
1941 case 'e': /* VPR --Cursor <n> Down */
1942 DEFAULT(csiescseq.arg[0], 1);
1943 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1944 break;
1945 case 'i': /* MC -- Media Copy */
1946 switch(csiescseq.arg[0]) {
1947 case 0:
1948 tdump();
1949 break;
1950 case 1:
1951 tdumpline(term.c.y);
1952 break;
1953 case 2:
1954 tdumpsel();
1955 break;
1956 case 4:
1957 term.mode &= ~MODE_PRINT;
1958 break;
1959 case 5:
1960 term.mode |= MODE_PRINT;
1961 break;
1962 }
1963 break;
1964 case 'c': /* DA -- Device Attributes */
1965 if(csiescseq.arg[0] == 0)
1966 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1967 break;
1968 case 'C': /* CUF -- Cursor <n> Forward */
1969 case 'a': /* HPR -- Cursor <n> Forward */
1970 DEFAULT(csiescseq.arg[0], 1);
1971 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1972 break;
1973 case 'D': /* CUB -- Cursor <n> Backward */
1974 DEFAULT(csiescseq.arg[0], 1);
1975 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1976 break;
1977 case 'E': /* CNL -- Cursor <n> Down and first col */
1978 DEFAULT(csiescseq.arg[0], 1);
1979 tmoveto(0, term.c.y+csiescseq.arg[0]);
1980 break;
1981 case 'F': /* CPL -- Cursor <n> Up and first col */
1982 DEFAULT(csiescseq.arg[0], 1);
1983 tmoveto(0, term.c.y-csiescseq.arg[0]);
1984 break;
1985 case 'g': /* TBC -- Tabulation clear */
1986 switch(csiescseq.arg[0]) {
1987 case 0: /* clear current tab stop */
1988 term.tabs[term.c.x] = 0;
1989 break;
1990 case 3: /* clear all the tabs */
1991 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1992 break;
1993 default:
1994 goto unknown;
1995 }
1996 break;
1997 case 'G': /* CHA -- Move to <col> */
1998 case '`': /* HPA */
1999 DEFAULT(csiescseq.arg[0], 1);
2000 tmoveto(csiescseq.arg[0]-1, term.c.y);
2001 break;
2002 case 'H': /* CUP -- Move to <row> <col> */
2003 case 'f': /* HVP */
2004 DEFAULT(csiescseq.arg[0], 1);
2005 DEFAULT(csiescseq.arg[1], 1);
2006 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
2007 break;
2008 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
2009 DEFAULT(csiescseq.arg[0], 1);
2010 while(csiescseq.arg[0]--)
2011 tputtab(1);
2012 break;
2013 case 'J': /* ED -- Clear screen */
2014 selclear(NULL);
2015 switch(csiescseq.arg[0]) {
2016 case 0: /* below */
2017 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
2018 if(term.c.y < term.row-1) {
2019 tclearregion(0, term.c.y+1, term.col-1,
2020 term.row-1);
2021 }
2022 break;
2023 case 1: /* above */
2024 if(term.c.y > 1)
2025 tclearregion(0, 0, term.col-1, term.c.y-1);
2026 tclearregion(0, term.c.y, term.c.x, term.c.y);
2027 break;
2028 case 2: /* all */
2029 tclearregion(0, 0, term.col-1, term.row-1);
2030 break;
2031 default:
2032 goto unknown;
2033 }
2034 break;
2035 case 'K': /* EL -- Clear line */
2036 switch(csiescseq.arg[0]) {
2037 case 0: /* right */
2038 tclearregion(term.c.x, term.c.y, term.col-1,
2039 term.c.y);
2040 break;
2041 case 1: /* left */
2042 tclearregion(0, term.c.y, term.c.x, term.c.y);
2043 break;
2044 case 2: /* all */
2045 tclearregion(0, term.c.y, term.col-1, term.c.y);
2046 break;
2047 }
2048 break;
2049 case 'S': /* SU -- Scroll <n> line up */
2050 DEFAULT(csiescseq.arg[0], 1);
2051 tscrollup(term.top, csiescseq.arg[0]);
2052 break;
2053 case 'T': /* SD -- Scroll <n> line down */
2054 DEFAULT(csiescseq.arg[0], 1);
2055 tscrolldown(term.top, csiescseq.arg[0]);
2056 break;
2057 case 'L': /* IL -- Insert <n> blank lines */
2058 DEFAULT(csiescseq.arg[0], 1);
2059 tinsertblankline(csiescseq.arg[0]);
2060 break;
2061 case 'l': /* RM -- Reset Mode */
2062 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
2063 break;
2064 case 'M': /* DL -- Delete <n> lines */
2065 DEFAULT(csiescseq.arg[0], 1);
2066 tdeleteline(csiescseq.arg[0]);
2067 break;
2068 case 'X': /* ECH -- Erase <n> char */
2069 DEFAULT(csiescseq.arg[0], 1);
2070 tclearregion(term.c.x, term.c.y,
2071 term.c.x + csiescseq.arg[0] - 1, term.c.y);
2072 break;
2073 case 'P': /* DCH -- Delete <n> char */
2074 DEFAULT(csiescseq.arg[0], 1);
2075 tdeletechar(csiescseq.arg[0]);
2076 break;
2077 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
2078 DEFAULT(csiescseq.arg[0], 1);
2079 while(csiescseq.arg[0]--)
2080 tputtab(0);
2081 break;
2082 case 'd': /* VPA -- Move to <row> */
2083 DEFAULT(csiescseq.arg[0], 1);
2084 tmoveato(term.c.x, csiescseq.arg[0]-1);
2085 break;
2086 case 'h': /* SM -- Set terminal mode */
2087 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
2088 break;
2089 case 'm': /* SGR -- Terminal attribute (color) */
2090 tsetattr(csiescseq.arg, csiescseq.narg);
2091 break;
2092 case 'n': /* DSR – Device Status Report (cursor position) */
2093 if (csiescseq.arg[0] == 6) {
2094 len = snprintf(buf, sizeof(buf),"\033[%i;%iR",
2095 term.c.y+1, term.c.x+1);
2096 ttywrite(buf, len);
2097 break;
2098 }
2099 case 'r': /* DECSTBM -- Set Scrolling Region */
2100 if(csiescseq.priv) {
2101 goto unknown;
2102 } else {
2103 DEFAULT(csiescseq.arg[0], 1);
2104 DEFAULT(csiescseq.arg[1], term.row);
2105 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
2106 tmoveato(0, 0);
2107 }
2108 break;
2109 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
2110 tcursor(CURSOR_SAVE);
2111 break;
2112 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
2113 tcursor(CURSOR_LOAD);
2114 break;
2115 }
2116 }
2117
2118 void
2119 csidump(void) {
2120 int i;
2121 uint c;
2122
2123 printf("ESC[");
2124 for(i = 0; i < csiescseq.len; i++) {
2125 c = csiescseq.buf[i] & 0xff;
2126 if(isprint(c)) {
2127 putchar(c);
2128 } else if(c == '\n') {
2129 printf("(\\n)");
2130 } else if(c == '\r') {
2131 printf("(\\r)");
2132 } else if(c == 0x1b) {
2133 printf("(\\e)");
2134 } else {
2135 printf("(%02x)", c);
2136 }
2137 }
2138 putchar('\n');
2139 }
2140
2141 void
2142 csireset(void) {
2143 memset(&csiescseq, 0, sizeof(csiescseq));
2144 }
2145
2146 void
2147 strhandle(void) {
2148 char *p = NULL;
2149 int j, narg, par;
2150
2151 strparse();
2152 narg = strescseq.narg;
2153 par = atoi(strescseq.args[0]);
2154
2155 switch(strescseq.type) {
2156 case ']': /* OSC -- Operating System Command */
2157 switch(par) {
2158 case 0:
2159 case 1:
2160 case 2:
2161 if(narg > 1)
2162 xsettitle(strescseq.args[1]);
2163 return;
2164 case 4: /* color set */
2165 if(narg < 3)
2166 break;
2167 p = strescseq.args[2];
2168 /* fall through */
2169 case 104: /* color reset, here p = NULL */
2170 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2171 if (!xsetcolorname(j, p)) {
2172 fprintf(stderr, "erresc: invalid color %s\n", p);
2173 } else {
2174 /*
2175 * TODO if defaultbg color is changed, borders
2176 * are dirty
2177 */
2178 redraw(0);
2179 }
2180 return;
2181 }
2182 break;
2183 case 'k': /* old title set compatibility */
2184 xsettitle(strescseq.args[0]);
2185 return;
2186 case 'P': /* DSC -- Device Control String */
2187 case '_': /* APC -- Application Program Command */
2188 case '^': /* PM -- Privacy Message */
2189 return;
2190 }
2191
2192 fprintf(stderr, "erresc: unknown str ");
2193 strdump();
2194 }
2195
2196 void
2197 strparse(void) {
2198 char *p = strescseq.buf;
2199
2200 strescseq.narg = 0;
2201 strescseq.buf[strescseq.len] = '\0';
2202 while(p && strescseq.narg < STR_ARG_SIZ)
2203 strescseq.args[strescseq.narg++] = strsep(&p, ";");
2204 }
2205
2206 void
2207 strdump(void) {
2208 int i;
2209 uint c;
2210
2211 printf("ESC%c", strescseq.type);
2212 for(i = 0; i < strescseq.len; i++) {
2213 c = strescseq.buf[i] & 0xff;
2214 if(c == '\0') {
2215 return;
2216 } else if(isprint(c)) {
2217 putchar(c);
2218 } else if(c == '\n') {
2219 printf("(\\n)");
2220 } else if(c == '\r') {
2221 printf("(\\r)");
2222 } else if(c == 0x1b) {
2223 printf("(\\e)");
2224 } else {
2225 printf("(%02x)", c);
2226 }
2227 }
2228 printf("ESC\\\n");
2229 }
2230
2231 void
2232 strreset(void) {
2233 memset(&strescseq, 0, sizeof(strescseq));
2234 }
2235
2236 void
2237 tprinter(char *s, size_t len) {
2238 if(iofd != -1 && xwrite(iofd, s, len) < 0) {
2239 fprintf(stderr, "Error writing in %s:%s\n",
2240 opt_io, strerror(errno));
2241 close(iofd);
2242 iofd = -1;
2243 }
2244 }
2245
2246 void
2247 toggleprinter(const Arg *arg) {
2248 term.mode ^= MODE_PRINT;
2249 }
2250
2251 void
2252 printscreen(const Arg *arg) {
2253 tdump();
2254 }
2255
2256 void
2257 printsel(const Arg *arg) {
2258 tdumpsel();
2259 }
2260
2261 void
2262 tdumpsel(void)
2263 {
2264 char *ptr;
2265
2266 ptr = getsel();
2267 tprinter(ptr, strlen(ptr));
2268 free(ptr);
2269 }
2270
2271 void
2272 tdumpline(int n) {
2273 Glyph *bp, *end;
2274
2275 bp = &term.line[n][0];
2276 end = &bp[term.col-1];
2277 while(end > bp && !strcmp(" ", end->c))
2278 --end;
2279 if(bp != end || strcmp(bp->c, " ")) {
2280 for( ;bp <= end; ++bp)
2281 tprinter(bp->c, strlen(bp->c));
2282 }
2283 tprinter("\n", 1);
2284 }
2285
2286 void
2287 tdump(void) {
2288 int i;
2289
2290 for(i = 0; i < term.row; ++i)
2291 tdumpline(i);
2292 }
2293
2294 void
2295 tputtab(bool forward) {
2296 uint x = term.c.x;
2297
2298 if(forward) {
2299 if(x == term.col)
2300 return;
2301 for(++x; x < term.col && !term.tabs[x]; ++x)
2302 /* nothing */ ;
2303 } else {
2304 if(x == 0)
2305 return;
2306 for(--x; x > 0 && !term.tabs[x]; --x)
2307 /* nothing */ ;
2308 }
2309 tmoveto(x, term.c.y);
2310 }
2311
2312 void
2313 techo(char *buf, int len) {
2314 for(; len > 0; buf++, len--) {
2315 char c = *buf;
2316
2317 if(c == '\033') { /* escape */
2318 tputc("^", 1);
2319 tputc("[", 1);
2320 } else if(c < '\x20') { /* control code */
2321 if(c != '\n' && c != '\r' && c != '\t') {
2322 c |= '\x40';
2323 tputc("^", 1);
2324 }
2325 tputc(&c, 1);
2326 } else {
2327 break;
2328 }
2329 }
2330 if(len)
2331 tputc(buf, len);
2332 }
2333
2334 void
2335 tdeftran(char ascii) {
2336 char c, (*bp)[2];
2337 static char tbl[][2] = {
2338 {'0', CS_GRAPHIC0}, {'1', CS_GRAPHIC1}, {'A', CS_UK},
2339 {'B', CS_USA}, {'<', CS_MULTI}, {'K', CS_GER},
2340 {'5', CS_FIN}, {'C', CS_FIN},
2341 {0, 0}
2342 };
2343
2344 for (bp = &tbl[0]; (c = (*bp)[0]) && c != ascii; ++bp)
2345 /* nothing */;
2346
2347 if (c == 0)
2348 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2349 else
2350 term.trantbl[term.icharset] = (*bp)[1];
2351 }
2352
2353 void
2354 tselcs(void) {
2355 if (term.trantbl[term.charset] == CS_GRAPHIC0)
2356 term.c.attr.mode |= ATTR_GFX;
2357 else
2358 term.c.attr.mode &= ~ATTR_GFX;
2359 }
2360
2361 void
2362 tputc(char *c, int len) {
2363 uchar ascii = *c;
2364 bool control = ascii < '\x20' || ascii == 0177;
2365 long unicodep;
2366 int width;
2367
2368 if(len == 1) {
2369 width = 1;
2370 } else {
2371 utf8decode(c, &unicodep, UTF_SIZ);
2372 width = wcwidth(unicodep);
2373 }
2374
2375 if(IS_SET(MODE_PRINT))
2376 tprinter(c, len);
2377
2378 /*
2379 * STR sequences must be checked before anything else
2380 * because it can use some control codes as part of the sequence.
2381 */
2382 if(term.esc & ESC_STR) {
2383 switch(ascii) {
2384 case '\033':
2385 term.esc = ESC_START | ESC_STR_END;
2386 break;
2387 case '\a': /* backwards compatibility to xterm */
2388 term.esc = 0;
2389 strhandle();
2390 break;
2391 default:
2392 if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2393 memmove(&strescseq.buf[strescseq.len], c, len);
2394 strescseq.len += len;
2395 } else {
2396 /*
2397 * Here is a bug in terminals. If the user never sends
2398 * some code to stop the str or esc command, then st
2399 * will stop responding. But this is better than
2400 * silently failing with unknown characters. At least
2401 * then users will report back.
2402 *
2403 * In the case users ever get fixed, here is the code:
2404 */
2405 /*
2406 * term.esc = 0;
2407 * strhandle();
2408 */
2409 }
2410 }
2411 return;
2412 }
2413
2414 /*
2415 * Actions of control codes must be performed as soon they arrive
2416 * because they can be embedded inside a control sequence, and
2417 * they must not cause conflicts with sequences.
2418 */
2419 if(control) {
2420 switch(ascii) {
2421 case '\t': /* HT */
2422 tputtab(1);
2423 return;
2424 case '\b': /* BS */
2425 tmoveto(term.c.x-1, term.c.y);
2426 return;
2427 case '\r': /* CR */
2428 tmoveto(0, term.c.y);
2429 return;
2430 case '\f': /* LF */
2431 case '\v': /* VT */
2432 case '\n': /* LF */
2433 /* go to first col if the mode is set */
2434 tnewline(IS_SET(MODE_CRLF));
2435 return;
2436 case '\a': /* BEL */
2437 if(!(xw.state & WIN_FOCUSED))
2438 xseturgency(1);
2439 if (bellvolume)
2440 XBell(xw.dpy, bellvolume);
2441 return;
2442 case '\033': /* ESC */
2443 csireset();
2444 term.esc = ESC_START;
2445 return;
2446 case '\016': /* SO */
2447 term.charset = 0;
2448 tselcs();
2449 return;
2450 case '\017': /* SI */
2451 term.charset = 1;
2452 tselcs();
2453 return;
2454 case '\032': /* SUB */
2455 case '\030': /* CAN */
2456 csireset();
2457 return;
2458 case '\005': /* ENQ (IGNORED) */
2459 case '\000': /* NUL (IGNORED) */
2460 case '\021': /* XON (IGNORED) */
2461 case '\023': /* XOFF (IGNORED) */
2462 case 0177: /* DEL (IGNORED) */
2463 return;
2464 }
2465 } else if(term.esc & ESC_START) {
2466 if(term.esc & ESC_CSI) {
2467 csiescseq.buf[csiescseq.len++] = ascii;
2468 if(BETWEEN(ascii, 0x40, 0x7E)
2469 || csiescseq.len >= \
2470 sizeof(csiescseq.buf)-1) {
2471 term.esc = 0;
2472 csiparse();
2473 csihandle();
2474 }
2475 } else if(term.esc & ESC_STR_END) {
2476 term.esc = 0;
2477 if(ascii == '\\')
2478 strhandle();
2479 } else if(term.esc & ESC_ALTCHARSET) {
2480 tdeftran(ascii);
2481 tselcs();
2482 term.esc = 0;
2483 } else if(term.esc & ESC_TEST) {
2484 if(ascii == '8') { /* DEC screen alignment test. */
2485 char E[UTF_SIZ] = "E";
2486 int x, y;
2487
2488 for(x = 0; x < term.col; ++x) {
2489 for(y = 0; y < term.row; ++y)
2490 tsetchar(E, &term.c.attr, x, y);
2491 }
2492 }
2493 term.esc = 0;
2494 } else {
2495 switch(ascii) {
2496 case '[':
2497 term.esc |= ESC_CSI;
2498 break;
2499 case '#':
2500 term.esc |= ESC_TEST;
2501 break;
2502 case 'P': /* DCS -- Device Control String */
2503 case '_': /* APC -- Application Program Command */
2504 case '^': /* PM -- Privacy Message */
2505 case ']': /* OSC -- Operating System Command */
2506 case 'k': /* old title set compatibility */
2507 strreset();
2508 strescseq.type = ascii;
2509 term.esc |= ESC_STR;
2510 break;
2511 case '(': /* set primary charset G0 */
2512 case ')': /* set secondary charset G1 */
2513 case '*': /* set tertiary charset G2 */
2514 case '+': /* set quaternary charset G3 */
2515 term.icharset = ascii - '(';
2516 term.esc |= ESC_ALTCHARSET;
2517 break;
2518 case 'D': /* IND -- Linefeed */
2519 if(term.c.y == term.bot) {
2520 tscrollup(term.top, 1);
2521 } else {
2522 tmoveto(term.c.x, term.c.y+1);
2523 }
2524 term.esc = 0;
2525 break;
2526 case 'E': /* NEL -- Next line */
2527 tnewline(1); /* always go to first col */
2528 term.esc = 0;
2529 break;
2530 case 'H': /* HTS -- Horizontal tab stop */
2531 term.tabs[term.c.x] = 1;
2532 term.esc = 0;
2533 break;
2534 case 'M': /* RI -- Reverse index */
2535 if(term.c.y == term.top) {
2536 tscrolldown(term.top, 1);
2537 } else {
2538 tmoveto(term.c.x, term.c.y-1);
2539 }
2540 term.esc = 0;
2541 break;
2542 case 'Z': /* DECID -- Identify Terminal */
2543 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2544 term.esc = 0;
2545 break;
2546 case 'c': /* RIS -- Reset to inital state */
2547 treset();
2548 term.esc = 0;
2549 xresettitle();
2550 xloadcols();
2551 break;
2552 case '=': /* DECPAM -- Application keypad */
2553 term.mode |= MODE_APPKEYPAD;
2554 term.esc = 0;
2555 break;
2556 case '>': /* DECPNM -- Normal keypad */
2557 term.mode &= ~MODE_APPKEYPAD;
2558 term.esc = 0;
2559 break;
2560 case '7': /* DECSC -- Save Cursor */
2561 tcursor(CURSOR_SAVE);
2562 term.esc = 0;
2563 break;
2564 case '8': /* DECRC -- Restore Cursor */
2565 tcursor(CURSOR_LOAD);
2566 term.esc = 0;
2567 break;
2568 case '\\': /* ST -- Stop */
2569 term.esc = 0;
2570 break;
2571 default:
2572 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2573 (uchar) ascii, isprint(ascii)? ascii:'.');
2574 term.esc = 0;
2575 }
2576 }
2577 /*
2578 * All characters which form part of a sequence are not
2579 * printed
2580 */
2581 return;
2582 }
2583 /*
2584 * Display control codes only if we are in graphic mode
2585 */
2586 if(control && !(term.c.attr.mode & ATTR_GFX))
2587 return;
2588 if(sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
2589 selclear(NULL);
2590 if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2591 term.line[term.c.y][term.c.x].mode |= ATTR_WRAP;
2592 tnewline(1);
2593 }
2594
2595 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col) {
2596 memmove(&term.line[term.c.y][term.c.x+1],
2597 &term.line[term.c.y][term.c.x],
2598 (term.col - term.c.x - 1) * sizeof(Glyph));
2599 }
2600
2601 if(term.c.x+width > term.col)
2602 tnewline(1);
2603
2604 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2605
2606 if(width == 2) {
2607 term.line[term.c.y][term.c.x].mode |= ATTR_WIDE;
2608 if(term.c.x+1 < term.col) {
2609 term.line[term.c.y][term.c.x+1].c[0] = '\0';
2610 term.line[term.c.y][term.c.x+1].mode = ATTR_WDUMMY;
2611 }
2612 }
2613 if(term.c.x+width < term.col) {
2614 tmoveto(term.c.x+width, term.c.y);
2615 } else {
2616 term.c.state |= CURSOR_WRAPNEXT;
2617 }
2618 }
2619
2620 int
2621 tresize(int col, int row) {
2622 int i;
2623 int minrow = MIN(row, term.row);
2624 int mincol = MIN(col, term.col);
2625 int slide = term.c.y - row + 1;
2626 bool *bp;
2627 Line *orig;
2628
2629 if(col < 1 || row < 1)
2630 return 0;
2631
2632 /* free unneeded rows */
2633 i = 0;
2634 if(slide > 0) {
2635 /*
2636 * slide screen to keep cursor where we expect it -
2637 * tscrollup would work here, but we can optimize to
2638 * memmove because we're freeing the earlier lines
2639 */
2640 for(/* i = 0 */; i < slide; i++) {
2641 free(term.line[i]);
2642 free(term.alt[i]);
2643 }
2644 memmove(term.line, term.line + slide, row * sizeof(Line));
2645 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2646 }
2647 for(i += row; i < term.row; i++) {
2648 free(term.line[i]);
2649 free(term.alt[i]);
2650 }
2651
2652 /* resize to new height */
2653 term.line = xrealloc(term.line, row * sizeof(Line));
2654 term.alt = xrealloc(term.alt, row * sizeof(Line));
2655 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2656 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2657
2658 /* resize each row to new width, zero-pad if needed */
2659 for(i = 0; i < minrow; i++) {
2660 term.dirty[i] = 1;
2661 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2662 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2663 }
2664
2665 /* allocate any new rows */
2666 for(/* i == minrow */; i < row; i++) {
2667 term.dirty[i] = 1;
2668 term.line[i] = xmalloc(col * sizeof(Glyph));
2669 term.alt[i] = xmalloc(col * sizeof(Glyph));
2670 }
2671 if(col > term.col) {
2672 bp = term.tabs + term.col;
2673
2674 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2675 while(--bp > term.tabs && !*bp)
2676 /* nothing */ ;
2677 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2678 *bp = 1;
2679 }
2680 /* update terminal size */
2681 term.col = col;
2682 term.row = row;
2683 /* reset scrolling region */
2684 tsetscroll(0, row-1);
2685 /* make use of the LIMIT in tmoveto */
2686 tmoveto(term.c.x, term.c.y);
2687 /* Clearing both screens */
2688 orig = term.line;
2689 do {
2690 if(mincol < col && 0 < minrow) {
2691 tclearregion(mincol, 0, col - 1, minrow - 1);
2692 }
2693 if(0 < col && minrow < row) {
2694 tclearregion(0, minrow, col - 1, row - 1);
2695 }
2696 tswapscreen();
2697 } while(orig != term.line);
2698
2699 return (slide > 0);
2700 }
2701
2702 void
2703 xresize(int col, int row) {
2704 xw.tw = MAX(1, col * xw.cw);
2705 xw.th = MAX(1, row * xw.ch);
2706
2707 XFreePixmap(xw.dpy, xw.buf);
2708 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2709 DefaultDepth(xw.dpy, xw.scr));
2710 XftDrawChange(xw.draw, xw.buf);
2711 xclear(0, 0, xw.w, xw.h);
2712 }
2713
2714 static inline ushort
2715 sixd_to_16bit(int x) {
2716 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2717 }
2718
2719 void
2720 xloadcols(void) {
2721 int i, r, g, b;
2722 XRenderColor color = { .alpha = 0xffff };
2723 static bool loaded;
2724 Colour *cp;
2725
2726 if(loaded) {
2727 for (cp = dc.col; cp < dc.col + LEN(dc.col); ++cp)
2728 XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
2729 }
2730
2731 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
2732 for(i = 0; i < LEN(colorname); i++) {
2733 if(!colorname[i])
2734 continue;
2735 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2736 die("Could not allocate color '%s'\n", colorname[i]);
2737 }
2738 }
2739
2740 /* load colors [16-255] ; same colors as xterm */
2741 for(i = 16, r = 0; r < 6; r++) {
2742 for(g = 0; g < 6; g++) {
2743 for(b = 0; b < 6; b++) {
2744 color.red = sixd_to_16bit(r);
2745 color.green = sixd_to_16bit(g);
2746 color.blue = sixd_to_16bit(b);
2747 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i])) {
2748 die("Could not allocate color %d\n", i);
2749 }
2750 i++;
2751 }
2752 }
2753 }
2754
2755 for(r = 0; r < 24; r++, i++) {
2756 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
2757 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color,
2758 &dc.col[i])) {
2759 die("Could not allocate color %d\n", i);
2760 }
2761 }
2762 loaded = true;
2763 }
2764
2765 int
2766 xsetcolorname(int x, const char *name) {
2767 XRenderColor color = { .alpha = 0xffff };
2768 Colour colour;
2769 if (x < 0 || x > LEN(colorname))
2770 return -1;
2771 if(!name) {
2772 if(16 <= x && x < 16 + 216) {
2773 int r = (x - 16) / 36, g = ((x - 16) % 36) / 6, b = (x - 16) % 6;
2774 color.red = sixd_to_16bit(r);
2775 color.green = sixd_to_16bit(g);
2776 color.blue = sixd_to_16bit(b);
2777 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2778 return 0; /* something went wrong */
2779 dc.col[x] = colour;
2780 return 1;
2781 } else if (16 + 216 <= x && x < 256) {
2782 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (x - (16 + 216));
2783 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2784 return 0; /* something went wrong */
2785 dc.col[x] = colour;
2786 return 1;
2787 } else {
2788 name = colorname[x];
2789 }
2790 }
2791 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &colour))
2792 return 0;
2793 dc.col[x] = colour;
2794 return 1;
2795 }
2796
2797 void
2798 xtermclear(int col1, int row1, int col2, int row2) {
2799 XftDrawRect(xw.draw,
2800 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2801 borderpx + col1 * xw.cw,
2802 borderpx + row1 * xw.ch,
2803 (col2-col1+1) * xw.cw,
2804 (row2-row1+1) * xw.ch);
2805 }
2806
2807 /*
2808 * Absolute coordinates.
2809 */
2810 void
2811 xclear(int x1, int y1, int x2, int y2) {
2812 XftDrawRect(xw.draw,
2813 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2814 x1, y1, x2-x1, y2-y1);
2815 }
2816
2817 void
2818 xhints(void) {
2819 XClassHint class = {opt_class ? opt_class : termname, termname};
2820 XWMHints wm = {.flags = InputHint, .input = 1};
2821 XSizeHints *sizeh = NULL;
2822
2823 sizeh = XAllocSizeHints();
2824 if(xw.isfixed == False) {
2825 sizeh->flags = PSize | PResizeInc | PBaseSize;
2826 sizeh->height = xw.h;
2827 sizeh->width = xw.w;
2828 sizeh->height_inc = xw.ch;
2829 sizeh->width_inc = xw.cw;
2830 sizeh->base_height = 2 * borderpx;
2831 sizeh->base_width = 2 * borderpx;
2832 } else {
2833 sizeh->flags = PMaxSize | PMinSize;
2834 sizeh->min_width = sizeh->max_width = xw.fw;
2835 sizeh->min_height = sizeh->max_height = xw.fh;
2836 }
2837
2838 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
2839 &class);
2840 XFree(sizeh);
2841 }
2842
2843 int
2844 xloadfont(Font *f, FcPattern *pattern) {
2845 FcPattern *match;
2846 FcResult result;
2847
2848 match = FcFontMatch(NULL, pattern, &result);
2849 if(!match)
2850 return 1;
2851
2852 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2853 FcPatternDestroy(match);
2854 return 1;
2855 }
2856
2857 f->set = NULL;
2858 f->pattern = FcPatternDuplicate(pattern);
2859
2860 f->ascent = f->match->ascent;
2861 f->descent = f->match->descent;
2862 f->lbearing = 0;
2863 f->rbearing = f->match->max_advance_width;
2864
2865 f->height = f->ascent + f->descent;
2866 f->width = f->lbearing + f->rbearing;
2867
2868 return 0;
2869 }
2870
2871 void
2872 xloadfonts(char *fontstr, double fontsize) {
2873 FcPattern *pattern;
2874 FcResult r_sz, r_psz;
2875 double fontval;
2876
2877 if(fontstr[0] == '-') {
2878 pattern = XftXlfdParse(fontstr, False, False);
2879 } else {
2880 pattern = FcNameParse((FcChar8 *)fontstr);
2881 }
2882
2883 if(!pattern)
2884 die("st: can't open font %s\n", fontstr);
2885
2886 if(fontsize > 0) {
2887 FcPatternDel(pattern, FC_PIXEL_SIZE);
2888 FcPatternDel(pattern, FC_SIZE);
2889 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2890 usedfontsize = fontsize;
2891 } else {
2892 r_psz = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2893 r_sz = FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval);
2894 if(r_psz == FcResultMatch) {
2895 usedfontsize = fontval;
2896 } else if(r_sz == FcResultMatch) {
2897 usedfontsize = -1;
2898 } else {
2899 /*
2900 * Default font size is 12, if none given. This is to
2901 * have a known usedfontsize value.
2902 */
2903 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
2904 usedfontsize = 12;
2905 }
2906 }
2907
2908 FcConfigSubstitute(0, pattern, FcMatchPattern);
2909 FcDefaultSubstitute(pattern);
2910
2911 if(xloadfont(&dc.font, pattern))
2912 die("st: can't open font %s\n", fontstr);
2913
2914 if(usedfontsize < 0) {
2915 FcPatternGetDouble(dc.font.match->pattern,
2916 FC_PIXEL_SIZE, 0, &fontval);
2917 usedfontsize = fontval;
2918 }
2919
2920 /* Setting character width and height. */
2921 xw.cw = CEIL(dc.font.width * cwscale);
2922 xw.ch = CEIL(dc.font.height * chscale);
2923
2924 FcPatternDel(pattern, FC_SLANT);
2925 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
2926 if(xloadfont(&dc.ifont, pattern))
2927 die("st: can't open font %s\n", fontstr);
2928
2929 FcPatternDel(pattern, FC_WEIGHT);
2930 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
2931 if(xloadfont(&dc.ibfont, pattern))
2932 die("st: can't open font %s\n", fontstr);
2933
2934 FcPatternDel(pattern, FC_SLANT);
2935 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
2936 if(xloadfont(&dc.bfont, pattern))
2937 die("st: can't open font %s\n", fontstr);
2938
2939 FcPatternDestroy(pattern);
2940 }
2941
2942 int
2943 xloadfontset(Font *f) {
2944 FcResult result;
2945
2946 if(!(f->set = FcFontSort(0, f->pattern, FcTrue, 0, &result)))
2947 return 1;
2948 return 0;
2949 }
2950
2951 void
2952 xunloadfont(Font *f) {
2953 XftFontClose(xw.dpy, f->match);
2954 FcPatternDestroy(f->pattern);
2955 if(f->set)
2956 FcFontSetDestroy(f->set);
2957 }
2958
2959 void
2960 xunloadfonts(void) {
2961 int i;
2962
2963 /* Free the loaded fonts in the font cache. */
2964 for(i = 0; i < frclen; i++) {
2965 XftFontClose(xw.dpy, frc[i].font);
2966 }
2967 frclen = 0;
2968
2969 xunloadfont(&dc.font);
2970 xunloadfont(&dc.bfont);
2971 xunloadfont(&dc.ifont);
2972 xunloadfont(&dc.ibfont);
2973 }
2974
2975 void
2976 xzoom(const Arg *arg) {
2977 xunloadfonts();
2978 xloadfonts(usedfont, usedfontsize + arg->i);
2979 cresize(0, 0);
2980 redraw(0);
2981 }
2982
2983 void
2984 xinit(void) {
2985 XGCValues gcvalues;
2986 Cursor cursor;
2987 Window parent;
2988 int sw, sh;
2989 pid_t thispid = getpid();
2990
2991 if(!(xw.dpy = XOpenDisplay(NULL)))
2992 die("Can't open display\n");
2993 xw.scr = XDefaultScreen(xw.dpy);
2994 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
2995
2996 /* font */
2997 if(!FcInit())
2998 die("Could not init fontconfig.\n");
2999
3000 usedfont = (opt_font == NULL)? font : opt_font;
3001 xloadfonts(usedfont, 0);
3002
3003 /* colors */
3004 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
3005 xloadcols();
3006
3007 /* adjust fixed window geometry */
3008 if(xw.isfixed) {
3009 sw = DisplayWidth(xw.dpy, xw.scr);
3010 sh = DisplayHeight(xw.dpy, xw.scr);
3011 if(xw.fx < 0)
3012 xw.fx = sw + xw.fx - xw.fw - 1;
3013 if(xw.fy < 0)
3014 xw.fy = sh + xw.fy - xw.fh - 1;
3015
3016 xw.h = xw.fh;
3017 xw.w = xw.fw;
3018 } else {
3019 /* window - default size */
3020 xw.h = 2 * borderpx + term.row * xw.ch;
3021 xw.w = 2 * borderpx + term.col * xw.cw;
3022 xw.fx = 0;
3023 xw.fy = 0;
3024 }
3025
3026 /* Events */
3027 xw.attrs.background_pixel = dc.col[defaultbg].pixel;
3028 xw.attrs.border_pixel = dc.col[defaultbg].pixel;
3029 xw.attrs.bit_gravity = NorthWestGravity;
3030 xw.attrs.event_mask = FocusChangeMask | KeyPressMask
3031 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
3032 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
3033 xw.attrs.colormap = xw.cmap;
3034
3035 parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
3036 XRootWindow(xw.dpy, xw.scr);
3037 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
3038 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
3039 xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
3040 | CWEventMask | CWColormap, &xw.attrs);
3041
3042 memset(&gcvalues, 0, sizeof(gcvalues));
3043 gcvalues.graphics_exposures = False;
3044 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
3045 &gcvalues);
3046 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
3047 DefaultDepth(xw.dpy, xw.scr));
3048 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
3049 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
3050
3051 /* Xft rendering context */
3052 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
3053
3054 /* input methods */
3055 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3056 XSetLocaleModifiers("@im=local");
3057 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3058 XSetLocaleModifiers("@im=");
3059 if((xw.xim = XOpenIM(xw.dpy,
3060 NULL, NULL, NULL)) == NULL) {
3061 die("XOpenIM failed. Could not open input"
3062 " device.\n");
3063 }
3064 }
3065 }
3066 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
3067 | XIMStatusNothing, XNClientWindow, xw.win,
3068 XNFocusWindow, xw.win, NULL);
3069 if(xw.xic == NULL)
3070 die("XCreateIC failed. Could not obtain input method.\n");
3071
3072 /* white cursor, black outline */
3073 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
3074 XDefineCursor(xw.dpy, xw.win, cursor);
3075 XRecolorCursor(xw.dpy, cursor,
3076 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
3077 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
3078
3079 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
3080 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
3081 xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
3082 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
3083
3084 xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
3085 XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
3086 PropModeReplace, (unsigned char *)&thispid, 1);
3087
3088 xresettitle();
3089 XMapWindow(xw.dpy, xw.win);
3090 xhints();
3091 XSync(xw.dpy, 0);
3092 }
3093
3094 void
3095 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
3096 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
3097 width = charlen * xw.cw, xp, i;
3098 int frcflags;
3099 int u8fl, u8fblen, u8cblen, doesexist;
3100 char *u8c, *u8fs;
3101 long unicodep;
3102 Font *font = &dc.font;
3103 FcResult fcres;
3104 FcPattern *fcpattern, *fontpattern;
3105 FcFontSet *fcsets[] = { NULL };
3106 FcCharSet *fccharset;
3107 Colour *fg, *bg, *temp, revfg, revbg, truefg, truebg;
3108 XRenderColor colfg, colbg;
3109 Rectangle r;
3110 int oneatatime;
3111
3112 frcflags = FRC_NORMAL;
3113
3114 if(base.mode & ATTR_ITALIC) {
3115 if(base.fg == defaultfg)
3116 base.fg = defaultitalic;
3117 font = &dc.ifont;
3118 frcflags = FRC_ITALIC;
3119 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
3120 if(base.fg == defaultfg)
3121 base.fg = defaultitalic;
3122 font = &dc.ibfont;
3123 frcflags = FRC_ITALICBOLD;
3124 } else if(base.mode & ATTR_UNDERLINE) {
3125 if(base.fg == defaultfg)
3126 base.fg = defaultunderline;
3127 }
3128
3129 if(IS_TRUECOL(base.fg)) {
3130 colfg.alpha = 0xffff;
3131 colfg.red = TRUERED(base.fg);
3132 colfg.green = TRUEGREEN(base.fg);
3133 colfg.blue = TRUEBLUE(base.fg);
3134 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
3135 fg = &truefg;
3136 } else {
3137 fg = &dc.col[base.fg];
3138 }
3139
3140 if(IS_TRUECOL(base.bg)) {
3141 colbg.alpha = 0xffff;
3142 colbg.green = TRUEGREEN(base.bg);
3143 colbg.red = TRUERED(base.bg);
3144 colbg.blue = TRUEBLUE(base.bg);
3145 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
3146 bg = &truebg;
3147 } else {
3148 bg = &dc.col[base.bg];
3149 }
3150
3151 if(base.mode & ATTR_BOLD) {
3152 if(BETWEEN(base.fg, 0, 7)) {
3153 /* basic system colors */
3154 fg = &dc.col[base.fg + 8];
3155 } else if(BETWEEN(base.fg, 16, 195)) {
3156 /* 256 colors */
3157 fg = &dc.col[base.fg + 36];
3158 } else if(BETWEEN(base.fg, 232, 251)) {
3159 /* greyscale */
3160 fg = &dc.col[base.fg + 4];
3161 }
3162 /*
3163 * Those ranges will not be brightened:
3164 * 8 - 15 – bright system colors
3165 * 196 - 231 – highest 256 color cube
3166 * 252 - 255 – brightest colors in greyscale
3167 */
3168 font = &dc.bfont;
3169 frcflags = FRC_BOLD;
3170 }
3171
3172 if(IS_SET(MODE_REVERSE)) {
3173 if(fg == &dc.col[defaultfg]) {
3174 fg = &dc.col[defaultbg];
3175 } else {
3176 colfg.red = ~fg->color.red;
3177 colfg.green = ~fg->color.green;
3178 colfg.blue = ~fg->color.blue;
3179 colfg.alpha = fg->color.alpha;
3180 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
3181 &revfg);
3182 fg = &revfg;
3183 }
3184
3185 if(bg == &dc.col[defaultbg]) {
3186 bg = &dc.col[defaultfg];
3187 } else {
3188 colbg.red = ~bg->color.red;
3189 colbg.green = ~bg->color.green;
3190 colbg.blue = ~bg->color.blue;
3191 colbg.alpha = bg->color.alpha;
3192 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
3193 &revbg);
3194 bg = &revbg;
3195 }
3196 }
3197
3198 if(base.mode & ATTR_REVERSE) {
3199 temp = fg;
3200 fg = bg;
3201 bg = temp;
3202 }
3203
3204 if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
3205 fg = bg;
3206
3207 /* Intelligent cleaning up of the borders. */
3208 if(x == 0) {
3209 xclear(0, (y == 0)? 0 : winy, borderpx,
3210 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
3211 }
3212 if(x + charlen >= term.col) {
3213 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
3214 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
3215 }
3216 if(y == 0)
3217 xclear(winx, 0, winx + width, borderpx);
3218 if(y == term.row-1)
3219 xclear(winx, winy + xw.ch, winx + width, xw.h);
3220
3221 /* Clean up the region we want to draw to. */
3222 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
3223
3224 /* Set the clip region because Xft is sometimes dirty. */
3225 r.x = 0;
3226 r.y = 0;
3227 r.height = xw.ch;
3228 r.width = width;
3229 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
3230
3231 for(xp = winx; bytelen > 0;) {
3232 /*
3233 * Search for the range in the to be printed string of glyphs
3234 * that are in the main font. Then print that range. If
3235 * some glyph is found that is not in the font, do the
3236 * fallback dance.
3237 */
3238 u8fs = s;
3239 u8fblen = 0;
3240 u8fl = 0;
3241 oneatatime = font->width != xw.cw;
3242 for(;;) {
3243 u8c = s;
3244 u8cblen = utf8decode(s, &unicodep, UTF_SIZ);
3245 s += u8cblen;
3246 bytelen -= u8cblen;
3247
3248 doesexist = XftCharExists(xw.dpy, font->match, unicodep);
3249 if(oneatatime || !doesexist || bytelen <= 0) {
3250 if(oneatatime || bytelen <= 0) {
3251 if(doesexist) {
3252 u8fl++;
3253 u8fblen += u8cblen;
3254 }
3255 }
3256
3257 if(u8fl > 0) {
3258 XftDrawStringUtf8(xw.draw, fg,
3259 font->match, xp,
3260 winy + font->ascent,
3261 (FcChar8 *)u8fs,
3262 u8fblen);
3263 xp += xw.cw * u8fl;
3264
3265 }
3266 break;
3267 }
3268
3269 u8fl++;
3270 u8fblen += u8cblen;
3271 }
3272 if(doesexist) {
3273 if(oneatatime)
3274 continue;
3275 break;
3276 }
3277
3278 /* Search the font cache. */
3279 for(i = 0; i < frclen; i++) {
3280 if(XftCharExists(xw.dpy, frc[i].font, unicodep)
3281 && frc[i].flags == frcflags) {
3282 break;
3283 }
3284 }
3285
3286 /* Nothing was found. */
3287 if(i >= frclen) {
3288 if(!font->set)
3289 xloadfontset(font);
3290 fcsets[0] = font->set;
3291
3292 /*
3293 * Nothing was found in the cache. Now use
3294 * some dozen of Fontconfig calls to get the
3295 * font for one single character.
3296 *
3297 * Xft and fontconfig are design failures.
3298 */
3299 fcpattern = FcPatternDuplicate(font->pattern);
3300 fccharset = FcCharSetCreate();
3301
3302 FcCharSetAddChar(fccharset, unicodep);
3303 FcPatternAddCharSet(fcpattern, FC_CHARSET,
3304 fccharset);
3305 FcPatternAddBool(fcpattern, FC_SCALABLE,
3306 FcTrue);
3307
3308 FcConfigSubstitute(0, fcpattern,
3309 FcMatchPattern);
3310 FcDefaultSubstitute(fcpattern);
3311
3312 fontpattern = FcFontSetMatch(0, fcsets,
3313 FcTrue, fcpattern, &fcres);
3314
3315 /*
3316 * Overwrite or create the new cache entry.
3317 */
3318 if(frclen >= LEN(frc)) {
3319 frclen = LEN(frc) - 1;
3320 XftFontClose(xw.dpy, frc[frclen].font);
3321 }
3322
3323 frc[frclen].font = XftFontOpenPattern(xw.dpy,
3324 fontpattern);
3325 frc[frclen].flags = frcflags;
3326
3327 i = frclen;
3328 frclen++;
3329
3330 FcPatternDestroy(fcpattern);
3331 FcCharSetDestroy(fccharset);
3332 }
3333
3334 XftDrawStringUtf8(xw.draw, fg, frc[i].font,
3335 xp, winy + frc[i].font->ascent,
3336 (FcChar8 *)u8c, u8cblen);
3337
3338 xp += xw.cw * wcwidth(unicodep);
3339 }
3340
3341 /*
3342 * This is how the loop above actually should be. Why does the
3343 * application have to care about font details?
3344 *
3345 * I have to repeat: Xft and Fontconfig are design failures.
3346 */
3347 /*
3348 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
3349 winy + font->ascent, (FcChar8 *)s, bytelen);
3350 */
3351
3352 if(base.mode & ATTR_UNDERLINE) {
3353 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
3354 width, 1);
3355 }
3356
3357 /* Reset clip to none. */
3358 XftDrawSetClip(xw.draw, 0);
3359 }
3360
3361 void
3362 xdrawcursor(void) {
3363 static int oldx = 0, oldy = 0;
3364 int sl, width, curx;
3365 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
3366
3367 LIMIT(oldx, 0, term.col-1);
3368 LIMIT(oldy, 0, term.row-1);
3369
3370 curx = term.c.x;
3371
3372 /* adjust position if in dummy */
3373 if(term.line[oldy][oldx].mode & ATTR_WDUMMY)
3374 oldx--;
3375 if(term.line[term.c.y][curx].mode & ATTR_WDUMMY)
3376 curx--;
3377
3378 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
3379
3380 /* remove the old cursor */
3381 sl = utf8len(term.line[oldy][oldx].c);
3382 width = (term.line[oldy][oldx].mode & ATTR_WIDE)? 2 : 1;
3383 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
3384 oldy, width, sl);
3385
3386 /* draw the new one */
3387 if(!(IS_SET(MODE_HIDE))) {
3388 if(xw.state & WIN_FOCUSED) {
3389 if(IS_SET(MODE_REVERSE)) {
3390 g.mode |= ATTR_REVERSE;
3391 g.fg = defaultcs;
3392 g.bg = defaultfg;
3393 }
3394
3395 sl = utf8len(g.c);
3396 width = (term.line[term.c.y][curx].mode & ATTR_WIDE)\
3397 ? 2 : 1;
3398 xdraws(g.c, g, term.c.x, term.c.y, width, sl);
3399 } else {
3400 XftDrawRect(xw.draw, &dc.col[defaultcs],
3401 borderpx + curx * xw.cw,
3402 borderpx + term.c.y * xw.ch,
3403 xw.cw - 1, 1);
3404 XftDrawRect(xw.draw, &dc.col[defaultcs],
3405 borderpx + curx * xw.cw,
3406 borderpx + term.c.y * xw.ch,
3407 1, xw.ch - 1);
3408 XftDrawRect(xw.draw, &dc.col[defaultcs],
3409 borderpx + (curx + 1) * xw.cw - 1,
3410 borderpx + term.c.y * xw.ch,
3411 1, xw.ch - 1);
3412 XftDrawRect(xw.draw, &dc.col[defaultcs],
3413 borderpx + curx * xw.cw,
3414 borderpx + (term.c.y + 1) * xw.ch - 1,
3415 xw.cw, 1);
3416 }
3417 oldx = curx, oldy = term.c.y;
3418 }
3419 }
3420
3421
3422 void
3423 xsettitle(char *p) {
3424 XTextProperty prop;
3425
3426 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3427 &prop);
3428 XSetWMName(xw.dpy, xw.win, &prop);
3429 XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
3430 XFree(prop.value);
3431 }
3432
3433 void
3434 xresettitle(void) {
3435 xsettitle(opt_title ? opt_title : "st");
3436 }
3437
3438 void
3439 redraw(int timeout) {
3440 struct timespec tv = {0, timeout * 1000};
3441
3442 tfulldirt();
3443 draw();
3444
3445 if(timeout > 0) {
3446 nanosleep(&tv, NULL);
3447 XSync(xw.dpy, False); /* necessary for a good tput flash */
3448 }
3449 }
3450
3451 void
3452 draw(void) {
3453 drawregion(0, 0, term.col, term.row);
3454 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3455 xw.h, 0, 0);
3456 XSetForeground(xw.dpy, dc.gc,
3457 dc.col[IS_SET(MODE_REVERSE)?
3458 defaultfg : defaultbg].pixel);
3459 }
3460
3461 void
3462 drawregion(int x1, int y1, int x2, int y2) {
3463 int ic, ib, x, y, ox, sl;
3464 Glyph base, new;
3465 char buf[DRAW_BUF_SIZ];
3466 bool ena_sel = sel.ob.x != -1;
3467 long unicodep;
3468
3469 if(sel.alt ^ IS_SET(MODE_ALTSCREEN))
3470 ena_sel = 0;
3471
3472 if(!(xw.state & WIN_VISIBLE))
3473 return;
3474
3475 for(y = y1; y < y2; y++) {
3476 if(!term.dirty[y])
3477 continue;
3478
3479 xtermclear(0, y, term.col, y);
3480 term.dirty[y] = 0;
3481 base = term.line[y][0];
3482 ic = ib = ox = 0;
3483 for(x = x1; x < x2; x++) {
3484 new = term.line[y][x];
3485 if(new.mode == ATTR_WDUMMY)
3486 continue;
3487 if(ena_sel && selected(x, y))
3488 new.mode ^= ATTR_REVERSE;
3489 if(ib > 0 && (ATTRCMP(base, new)
3490 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3491 xdraws(buf, base, ox, y, ic, ib);
3492 ic = ib = 0;
3493 }
3494 if(ib == 0) {
3495 ox = x;
3496 base = new;
3497 }
3498
3499 sl = utf8decode(new.c, &unicodep, UTF_SIZ);
3500 memcpy(buf+ib, new.c, sl);
3501 ib += sl;
3502 ic += (new.mode & ATTR_WIDE)? 2 : 1;
3503 }
3504 if(ib > 0)
3505 xdraws(buf, base, ox, y, ic, ib);
3506 }
3507 xdrawcursor();
3508 }
3509
3510 void
3511 expose(XEvent *ev) {
3512 XExposeEvent *e = &ev->xexpose;
3513
3514 if(xw.state & WIN_REDRAW) {
3515 if(!e->count)
3516 xw.state &= ~WIN_REDRAW;
3517 }
3518 redraw(0);
3519 }
3520
3521 void
3522 visibility(XEvent *ev) {
3523 XVisibilityEvent *e = &ev->xvisibility;
3524
3525 if(e->state == VisibilityFullyObscured) {
3526 xw.state &= ~WIN_VISIBLE;
3527 } else if(!(xw.state & WIN_VISIBLE)) {
3528 /* need a full redraw for next Expose, not just a buf copy */
3529 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3530 }
3531 }
3532
3533 void
3534 unmap(XEvent *ev) {
3535 xw.state &= ~WIN_VISIBLE;
3536 }
3537
3538 void
3539 xsetpointermotion(int set) {
3540 MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
3541 XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
3542 }
3543
3544 void
3545 xseturgency(int add) {
3546 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3547
3548 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
3549 XSetWMHints(xw.dpy, xw.win, h);
3550 XFree(h);
3551 }
3552
3553 void
3554 focus(XEvent *ev) {
3555 XFocusChangeEvent *e = &ev->xfocus;
3556
3557 if(e->mode == NotifyGrab)
3558 return;
3559
3560 if(ev->type == FocusIn) {
3561 XSetICFocus(xw.xic);
3562 xw.state |= WIN_FOCUSED;
3563 xseturgency(0);
3564 if(IS_SET(MODE_FOCUS))
3565 ttywrite("\033[I", 3);
3566 } else {
3567 XUnsetICFocus(xw.xic);
3568 xw.state &= ~WIN_FOCUSED;
3569 if(IS_SET(MODE_FOCUS))
3570 ttywrite("\033[O", 3);
3571 }
3572 }
3573
3574 static inline bool
3575 match(uint mask, uint state) {
3576 return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
3577 }
3578
3579 void
3580 numlock(const Arg *dummy) {
3581 term.numlock ^= 1;
3582 }
3583
3584 char*
3585 kmap(KeySym k, uint state) {
3586 Key *kp;
3587 int i;
3588
3589 /* Check for mapped keys out of X11 function keys. */
3590 for(i = 0; i < LEN(mappedkeys); i++) {
3591 if(mappedkeys[i] == k)
3592 break;
3593 }
3594 if(i == LEN(mappedkeys)) {
3595 if((k & 0xFFFF) < 0xFD00)
3596 return NULL;
3597 }
3598
3599 for(kp = key; kp < key + LEN(key); kp++) {
3600 if(kp->k != k)
3601 continue;
3602
3603 if(!match(kp->mask, state))
3604 continue;
3605
3606 if(IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
3607 continue;
3608 if(term.numlock && kp->appkey == 2)
3609 continue;
3610
3611 if(IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
3612 continue;
3613
3614 if(IS_SET(MODE_CRLF) ? kp->crlf < 0 : kp->crlf > 0)
3615 continue;
3616
3617 return kp->s;
3618 }
3619
3620 return NULL;
3621 }
3622
3623 void
3624 kpress(XEvent *ev) {
3625 XKeyEvent *e = &ev->xkey;
3626 KeySym ksym;
3627 char buf[32], *customkey;
3628 int len;
3629 long c;
3630 Status status;
3631 Shortcut *bp;
3632
3633 if(IS_SET(MODE_KBDLOCK))
3634 return;
3635
3636 len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
3637 /* 1. shortcuts */
3638 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3639 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3640 bp->func(&(bp->arg));
3641 return;
3642 }
3643 }
3644
3645 /* 2. custom keys from config.h */
3646 if((customkey = kmap(ksym, e->state))) {
3647 ttysend(customkey, strlen(customkey));
3648 return;
3649 }
3650
3651 /* 3. composed string from input method */
3652 if(len == 0)
3653 return;
3654 if(len == 1 && e->state & Mod1Mask) {
3655 if(IS_SET(MODE_8BIT)) {
3656 if(*buf < 0177) {
3657 c = *buf | 0x80;
3658 len = utf8encode(c, buf, UTF_SIZ);
3659 }
3660 } else {
3661 buf[1] = buf[0];
3662 buf[0] = '\033';
3663 len = 2;
3664 }
3665 }
3666 ttysend(buf, len);
3667 }
3668
3669
3670 void
3671 cmessage(XEvent *e) {
3672 /*
3673 * See xembed specs
3674 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3675 */
3676 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3677 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3678 xw.state |= WIN_FOCUSED;
3679 xseturgency(0);
3680 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3681 xw.state &= ~WIN_FOCUSED;
3682 }
3683 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3684 /* Send SIGHUP to shell */
3685 kill(pid, SIGHUP);
3686 exit(EXIT_SUCCESS);
3687 }
3688 }
3689
3690 void
3691 cresize(int width, int height) {
3692 int col, row;
3693
3694 if(width != 0)
3695 xw.w = width;
3696 if(height != 0)
3697 xw.h = height;
3698
3699 col = (xw.w - 2 * borderpx) / xw.cw;
3700 row = (xw.h - 2 * borderpx) / xw.ch;
3701
3702 tresize(col, row);
3703 xresize(col, row);
3704 ttyresize();
3705 }
3706
3707 void
3708 resize(XEvent *e) {
3709 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3710 return;
3711
3712 cresize(e->xconfigure.width, e->xconfigure.height);
3713 }
3714
3715 void
3716 run(void) {
3717 XEvent ev;
3718 int w = xw.w, h = xw.h;
3719 fd_set rfd;
3720 int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3721 struct timeval drawtimeout, *tv = NULL, now, last, lastblink;
3722
3723 /* Waiting for window mapping */
3724 while(1) {
3725 XNextEvent(xw.dpy, &ev);
3726 if(ev.type == ConfigureNotify) {
3727 w = ev.xconfigure.width;
3728 h = ev.xconfigure.height;
3729 } else if(ev.type == MapNotify) {
3730 break;
3731 }
3732 }
3733
3734 ttynew();
3735 if(!xw.isfixed)
3736 cresize(w, h);
3737 else
3738 cresize(xw.fw, xw.fh);
3739
3740 gettimeofday(&lastblink, NULL);
3741 gettimeofday(&last, NULL);
3742
3743 for(xev = actionfps;;) {
3744 long deltatime;
3745
3746 FD_ZERO(&rfd);
3747 FD_SET(cmdfd, &rfd);
3748 FD_SET(xfd, &rfd);
3749
3750 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
3751 if(errno == EINTR)
3752 continue;
3753 die("select failed: %s\n", SERRNO);
3754 }
3755 if(FD_ISSET(cmdfd, &rfd)) {
3756 ttyread();
3757 if(blinktimeout) {
3758 blinkset = tattrset(ATTR_BLINK);
3759 if(!blinkset)
3760 MODBIT(term.mode, 0, MODE_BLINK);
3761 }
3762 }
3763
3764 if(FD_ISSET(xfd, &rfd))
3765 xev = actionfps;
3766
3767 gettimeofday(&now, NULL);
3768 drawtimeout.tv_sec = 0;
3769 drawtimeout.tv_usec = (1000/xfps) * 1000;
3770 tv = &drawtimeout;
3771
3772 dodraw = 0;
3773 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
3774 tsetdirtattr(ATTR_BLINK);
3775 term.mode ^= MODE_BLINK;
3776 gettimeofday(&lastblink, NULL);
3777 dodraw = 1;
3778 }
3779 deltatime = TIMEDIFF(now, last);
3780 if(deltatime > (xev? (1000/xfps) : (1000/actionfps))
3781 || deltatime < 0) {
3782 dodraw = 1;
3783 last = now;
3784 }
3785
3786 if(dodraw) {
3787 while(XPending(xw.dpy)) {
3788 XNextEvent(xw.dpy, &ev);
3789 if(XFilterEvent(&ev, None))
3790 continue;
3791 if(handler[ev.type])
3792 (handler[ev.type])(&ev);
3793 }
3794
3795 draw();
3796 XFlush(xw.dpy);
3797
3798 if(xev && !FD_ISSET(xfd, &rfd))
3799 xev--;
3800 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
3801 if(blinkset) {
3802 if(TIMEDIFF(now, lastblink) \
3803 > blinktimeout) {
3804 drawtimeout.tv_usec = 1;
3805 } else {
3806 drawtimeout.tv_usec = (1000 * \
3807 (blinktimeout - \
3808 TIMEDIFF(now,
3809 lastblink)));
3810 }
3811 } else {
3812 tv = NULL;
3813 }
3814 }
3815 }
3816 }
3817 }
3818
3819 void
3820 usage(void) {
3821 die("%s " VERSION " (c) 2010-2013 st engineers\n" \
3822 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]" \
3823 " [-t title] [-w windowid] [-e command ...]\n", argv0);
3824 }
3825
3826 int
3827 main(int argc, char *argv[]) {
3828 int bitm, xr, yr;
3829 uint wr, hr;
3830 char *titles;
3831
3832 xw.fw = xw.fh = xw.fx = xw.fy = 0;
3833 xw.isfixed = False;
3834
3835 ARGBEGIN {
3836 case 'a':
3837 allowaltscreen = false;
3838 break;
3839 case 'c':
3840 opt_class = EARGF(usage());
3841 break;
3842 case 'e':
3843 /* eat all remaining arguments */
3844 if(argc > 1) {
3845 opt_cmd = &argv[1];
3846 if(argv[1] != NULL && opt_title == NULL) {
3847 titles = xstrdup(argv[1]);
3848 opt_title = basename(titles);
3849 }
3850 }
3851 goto run;
3852 case 'f':
3853 opt_font = EARGF(usage());
3854 break;
3855 case 'g':
3856 bitm = XParseGeometry(EARGF(usage()), &xr, &yr, &wr, &hr);
3857 if(bitm & XValue)
3858 xw.fx = xr;
3859 if(bitm & YValue)
3860 xw.fy = yr;
3861 if(bitm & WidthValue)
3862 xw.fw = (int)wr;
3863 if(bitm & HeightValue)
3864 xw.fh = (int)hr;
3865 if(bitm & XNegative && xw.fx == 0)
3866 xw.fx = -1;
3867 if(bitm & YNegative && xw.fy == 0)
3868 xw.fy = -1;
3869
3870 if(xw.fh != 0 && xw.fw != 0)
3871 xw.isfixed = True;
3872 break;
3873 case 'o':
3874 opt_io = EARGF(usage());
3875 break;
3876 case 't':
3877 opt_title = EARGF(usage());
3878 break;
3879 case 'w':
3880 opt_embed = EARGF(usage());
3881 break;
3882 case 'v':
3883 default:
3884 usage();
3885 } ARGEND;
3886
3887 run:
3888 setlocale(LC_CTYPE, "");
3889 XSetLocaleModifiers("");
3890 tnew(80, 24);
3891 xinit();
3892 selinit();
3893 run();
3894
3895 return 0;
3896 }
3897