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[st.git] / st.c
1 /* See LICENSE for licence details. */
2 #include <ctype.h>
3 #include <errno.h>
4 #include <fcntl.h>
5 #include <limits.h>
6 #include <locale.h>
7 #include <pwd.h>
8 #include <stdarg.h>
9 #include <stdbool.h>
10 #include <stdio.h>
11 #include <stdlib.h>
12 #include <string.h>
13 #include <signal.h>
14 #include <stdint.h>
15 #include <sys/ioctl.h>
16 #include <sys/select.h>
17 #include <sys/stat.h>
18 #include <sys/time.h>
19 #include <sys/types.h>
20 #include <sys/wait.h>
21 #include <time.h>
22 #include <unistd.h>
23 #include <libgen.h>
24 #include <X11/Xatom.h>
25 #include <X11/Xlib.h>
26 #include <X11/Xutil.h>
27 #include <X11/cursorfont.h>
28 #include <X11/keysym.h>
29 #include <X11/Xft/Xft.h>
30 #include <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
40 #if defined(__linux)
41 #include <pty.h>
42 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
43 #include <util.h>
44 #elif defined(__FreeBSD__) || defined(__DragonFly__)
45 #include <libutil.h>
46 #endif
47
48
49 /* XEMBED messages */
50 #define XEMBED_FOCUS_IN 4
51 #define XEMBED_FOCUS_OUT 5
52
53 /* Arbitrary sizes */
54 #define UTF_INVALID 0xFFFD
55 #define UTF_SIZ 4
56 #define ESC_BUF_SIZ (128*UTF_SIZ)
57 #define ESC_ARG_SIZ 16
58 #define STR_BUF_SIZ ESC_BUF_SIZ
59 #define STR_ARG_SIZ ESC_ARG_SIZ
60 #define DRAW_BUF_SIZ 20*1024
61 #define XK_ANY_MOD UINT_MAX
62 #define XK_NO_MOD 0
63 #define XK_SWITCH_MOD (1<<13)
64
65 #define REDRAW_TIMEOUT (80*1000) /* 80 ms */
66
67 /* macros */
68 #define MIN(a, b) ((a) < (b) ? (a) : (b))
69 #define MAX(a, b) ((a) < (b) ? (b) : (a))
70 #define LEN(a) (sizeof(a) / sizeof(a[0]))
71 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
72 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
73 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
74 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
75 #define IS_SET(flag) ((term.mode & (flag)) != 0)
76 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_usec-t2.tv_usec)/1000)
77 #define CEIL(x) (((x) != (int) (x)) ? (x) + 1 : (x))
78
79 #define TRUECOLOR(r,g,b) (1 << 24 | (r) << 16 | (g) << 8 | (b))
80 #define IS_TRUECOL(x) (1 << 24 & (x))
81 #define TRUERED(x) (((x) & 0xff0000) >> 8)
82 #define TRUEGREEN(x) (((x) & 0xff00))
83 #define TRUEBLUE(x) (((x) & 0xff) << 8)
84
85
86 #define VT102ID "\033[?6c"
87
88 enum glyph_attribute {
89 ATTR_NULL = 0,
90 ATTR_REVERSE = 1,
91 ATTR_UNDERLINE = 2,
92 ATTR_BOLD = 4,
93 ATTR_GFX = 8,
94 ATTR_ITALIC = 16,
95 ATTR_BLINK = 32,
96 ATTR_WRAP = 64,
97 ATTR_WIDE = 128,
98 ATTR_WDUMMY = 256,
99 };
100
101 enum cursor_movement {
102 CURSOR_SAVE,
103 CURSOR_LOAD
104 };
105
106 enum cursor_state {
107 CURSOR_DEFAULT = 0,
108 CURSOR_WRAPNEXT = 1,
109 CURSOR_ORIGIN = 2
110 };
111
112 enum term_mode {
113 MODE_WRAP = 1,
114 MODE_INSERT = 2,
115 MODE_APPKEYPAD = 4,
116 MODE_ALTSCREEN = 8,
117 MODE_CRLF = 16,
118 MODE_MOUSEBTN = 32,
119 MODE_MOUSEMOTION = 64,
120 MODE_REVERSE = 128,
121 MODE_KBDLOCK = 256,
122 MODE_HIDE = 512,
123 MODE_ECHO = 1024,
124 MODE_APPCURSOR = 2048,
125 MODE_MOUSESGR = 4096,
126 MODE_8BIT = 8192,
127 MODE_BLINK = 16384,
128 MODE_FBLINK = 32768,
129 MODE_FOCUS = 65536,
130 MODE_MOUSEX10 = 131072,
131 MODE_MOUSEMANY = 262144,
132 MODE_BRCKTPASTE = 524288,
133 MODE_PRINT = 1048576,
134 MODE_MOUSE = MODE_MOUSEBTN|MODE_MOUSEMOTION|MODE_MOUSEX10\
135 |MODE_MOUSEMANY,
136 };
137
138 enum charset {
139 CS_GRAPHIC0,
140 CS_GRAPHIC1,
141 CS_UK,
142 CS_USA,
143 CS_MULTI,
144 CS_GER,
145 CS_FIN
146 };
147
148 enum escape_state {
149 ESC_START = 1,
150 ESC_CSI = 2,
151 ESC_STR = 4, /* DSC, OSC, PM, APC */
152 ESC_ALTCHARSET = 8,
153 ESC_STR_END = 16, /* a final string was encountered */
154 ESC_TEST = 32, /* Enter in test mode */
155 };
156
157 enum window_state {
158 WIN_VISIBLE = 1,
159 WIN_REDRAW = 2,
160 WIN_FOCUSED = 4
161 };
162
163 enum selection_type {
164 SEL_REGULAR = 1,
165 SEL_RECTANGULAR = 2
166 };
167
168 enum selection_snap {
169 SNAP_WORD = 1,
170 SNAP_LINE = 2
171 };
172
173 typedef unsigned char uchar;
174 typedef unsigned int uint;
175 typedef unsigned long ulong;
176 typedef unsigned short ushort;
177
178 typedef XftDraw *Draw;
179 typedef XftColor Colour;
180 typedef Colormap Colourmap;
181
182 typedef struct {
183 char c[UTF_SIZ]; /* character code */
184 ushort mode; /* attribute flags */
185 uint32_t fg; /* foreground */
186 uint32_t bg; /* background */
187 } Glyph;
188
189 typedef Glyph *Line;
190
191 typedef struct {
192 Glyph attr; /* current char attributes */
193 int x;
194 int y;
195 char state;
196 } TCursor;
197
198 /* CSI Escape sequence structs */
199 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
200 typedef struct {
201 char buf[ESC_BUF_SIZ]; /* raw string */
202 int len; /* raw string length */
203 char priv;
204 int arg[ESC_ARG_SIZ];
205 int narg; /* nb of args */
206 char mode;
207 } CSIEscape;
208
209 /* STR Escape sequence structs */
210 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
211 typedef struct {
212 char type; /* ESC type ... */
213 char buf[STR_BUF_SIZ]; /* raw string */
214 int len; /* raw string length */
215 char *args[STR_ARG_SIZ];
216 int narg; /* nb of args */
217 } STREscape;
218
219 /* Internal representation of the screen */
220 typedef struct {
221 int row; /* nb row */
222 int col; /* nb col */
223 Line *line; /* screen */
224 Line *alt; /* alternate screen */
225 bool *dirty; /* dirtyness of lines */
226 TCursor c; /* cursor */
227 int top; /* top scroll limit */
228 int bot; /* bottom scroll limit */
229 int mode; /* terminal mode flags */
230 int esc; /* escape state flags */
231 char trantbl[4]; /* charset table translation */
232 int charset; /* current charset */
233 int icharset; /* selected charset for sequence */
234 bool numlock; /* lock numbers in keyboard */
235 bool *tabs;
236 } Term;
237
238 /* Purely graphic info */
239 typedef struct {
240 Display *dpy;
241 Colourmap cmap;
242 Window win;
243 Drawable buf;
244 Atom xembed, wmdeletewin, netwmname, netwmpid;
245 XIM xim;
246 XIC xic;
247 Draw draw;
248 Visual *vis;
249 XSetWindowAttributes attrs;
250 int scr;
251 bool isfixed; /* is fixed geometry? */
252 int fx, fy, fw, fh; /* fixed geometry */
253 int tw, th; /* tty width and height */
254 int w, h; /* window width and height */
255 int ch; /* char height */
256 int cw; /* char width */
257 char state; /* focus, redraw, visible */
258 } XWindow;
259
260 typedef struct {
261 uint b;
262 uint mask;
263 char *s;
264 } Mousekey;
265
266 typedef struct {
267 KeySym k;
268 uint mask;
269 char *s;
270 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
271 signed char appkey; /* application keypad */
272 signed char appcursor; /* application cursor */
273 signed char crlf; /* crlf mode */
274 } Key;
275
276 typedef struct {
277 int mode;
278 int type;
279 int snap;
280 /*
281 * Selection variables:
282 * nb – normalized coordinates of the beginning of the selection
283 * ne – normalized coordinates of the end of the selection
284 * ob – original coordinates of the beginning of the selection
285 * oe – original coordinates of the end of the selection
286 */
287 struct {
288 int x, y;
289 } nb, ne, ob, oe;
290
291 char *clip;
292 Atom xtarget;
293 bool alt;
294 struct timeval tclick1;
295 struct timeval tclick2;
296 } Selection;
297
298 typedef union {
299 int i;
300 unsigned int ui;
301 float f;
302 const void *v;
303 } Arg;
304
305 typedef struct {
306 unsigned int mod;
307 KeySym keysym;
308 void (*func)(const Arg *);
309 const Arg arg;
310 } Shortcut;
311
312 /* function definitions used in config.h */
313 static void clippaste(const Arg *);
314 static void numlock(const Arg *);
315 static void selpaste(const Arg *);
316 static void xzoom(const Arg *);
317 static void printsel(const Arg *);
318 static void printscreen(const Arg *) ;
319 static void toggleprinter(const Arg *);
320
321 /* Config.h for applying patches and the configuration. */
322 #include "config.h"
323
324 /* Font structure */
325 typedef struct {
326 int height;
327 int width;
328 int ascent;
329 int descent;
330 short lbearing;
331 short rbearing;
332 XftFont *match;
333 FcFontSet *set;
334 FcPattern *pattern;
335 } Font;
336
337 /* Drawing Context */
338 typedef struct {
339 Colour col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
340 Font font, bfont, ifont, ibfont;
341 GC gc;
342 } DC;
343
344 static void die(const char *, ...);
345 static void draw(void);
346 static void redraw(int);
347 static void drawregion(int, int, int, int);
348 static void execsh(void);
349 static void sigchld(int);
350 static void run(void);
351
352 static void csidump(void);
353 static void csihandle(void);
354 static void csiparse(void);
355 static void csireset(void);
356 static void strdump(void);
357 static void strhandle(void);
358 static void strparse(void);
359 static void strreset(void);
360
361 static int tattrset(int);
362 static void tprinter(char *s, size_t len);
363 static void tdumpsel(void);
364 static void tdumpline(int);
365 static void tdump(void);
366 static void tclearregion(int, int, int, int);
367 static void tcursor(int);
368 static void tdeletechar(int);
369 static void tdeleteline(int);
370 static void tinsertblank(int);
371 static void tinsertblankline(int);
372 static void tmoveto(int, int);
373 static void tmoveato(int x, int y);
374 static void tnew(int, int);
375 static void tnewline(int);
376 static void tputtab(bool);
377 static void tputc(char *, int);
378 static void treset(void);
379 static int tresize(int, int);
380 static void tscrollup(int, int);
381 static void tscrolldown(int, int);
382 static void tsetattr(int*, int);
383 static void tsetchar(char *, Glyph *, int, int);
384 static void tsetscroll(int, int);
385 static void tswapscreen(void);
386 static void tsetdirt(int, int);
387 static void tsetdirtattr(int);
388 static void tsetmode(bool, bool, int *, int);
389 static void tfulldirt(void);
390 static void techo(char *, int);
391 static int32_t tdefcolor(int *, int *, int);
392 static void tselcs(void);
393 static void tdeftran(char);
394 static inline bool match(uint, uint);
395 static void ttynew(void);
396 static void ttyread(void);
397 static void ttyresize(void);
398 static void ttysend(char *, size_t);
399 static void ttywrite(const char *, size_t);
400
401 static void xdraws(char *, Glyph, int, int, int, int);
402 static void xhints(void);
403 static void xclear(int, int, int, int);
404 static void xdrawcursor(void);
405 static void xinit(void);
406 static void xloadcols(void);
407 static int xsetcolorname(int, const char *);
408 static int xloadfont(Font *, FcPattern *);
409 static void xloadfonts(char *, double);
410 static int xloadfontset(Font *);
411 static void xsettitle(char *);
412 static void xresettitle(void);
413 static void xsetpointermotion(int);
414 static void xseturgency(int);
415 static void xsetsel(char*);
416 static void xtermclear(int, int, int, int);
417 static void xunloadfont(Font *f);
418 static void xunloadfonts(void);
419 static void xresize(int, int);
420
421 static void expose(XEvent *);
422 static void visibility(XEvent *);
423 static void unmap(XEvent *);
424 static char *kmap(KeySym, uint);
425 static void kpress(XEvent *);
426 static void cmessage(XEvent *);
427 static void cresize(int, int);
428 static void resize(XEvent *);
429 static void focus(XEvent *);
430 static void brelease(XEvent *);
431 static void bpress(XEvent *);
432 static void bmotion(XEvent *);
433 static void selnotify(XEvent *);
434 static void selclear(XEvent *);
435 static void selrequest(XEvent *);
436
437 static void selinit(void);
438 static void selsort(void);
439 static inline bool selected(int, int);
440 static char *getsel(void);
441 static void selcopy(void);
442 static void selscroll(int, int);
443 static void selsnap(int, int *, int *, int);
444
445 static size_t utf8decode(char *, long *, size_t);
446 static long utf8decodebyte(char, size_t *);
447 static size_t utf8encode(long, char *, size_t);
448 static char utf8encodebyte(long, size_t);
449 static size_t utf8len(char *);
450 static size_t utf8validate(long *, size_t);
451
452 static ssize_t xwrite(int, char *, size_t);
453 static void *xmalloc(size_t);
454 static void *xrealloc(void *, size_t);
455 static char *xstrdup(char *s);
456
457 static void (*handler[LASTEvent])(XEvent *) = {
458 [KeyPress] = kpress,
459 [ClientMessage] = cmessage,
460 [ConfigureNotify] = resize,
461 [VisibilityNotify] = visibility,
462 [UnmapNotify] = unmap,
463 [Expose] = expose,
464 [FocusIn] = focus,
465 [FocusOut] = focus,
466 [MotionNotify] = bmotion,
467 [ButtonPress] = bpress,
468 [ButtonRelease] = brelease,
469 [SelectionClear] = selclear,
470 [SelectionNotify] = selnotify,
471 [SelectionRequest] = selrequest,
472 };
473
474 /* Globals */
475 static DC dc;
476 static XWindow xw;
477 static Term term;
478 static CSIEscape csiescseq;
479 static STREscape strescseq;
480 static int cmdfd;
481 static pid_t pid;
482 static Selection sel;
483 static int iofd = STDOUT_FILENO;
484 static char **opt_cmd = NULL;
485 static char *opt_io = NULL;
486 static char *opt_title = NULL;
487 static char *opt_embed = NULL;
488 static char *opt_class = NULL;
489 static char *opt_font = NULL;
490 static int oldbutton = 3; /* button event on startup: 3 = release */
491
492 static char *usedfont = NULL;
493 static double usedfontsize = 0;
494
495 static uchar utfbyte[UTF_SIZ + 1] = {0x80, 0, 0xC0, 0xE0, 0xF0};
496 static uchar utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
497 static long utfmin[UTF_SIZ + 1] = { 0, 0, 0x80, 0x800, 0x10000};
498 static long utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
499
500 /* Font Ring Cache */
501 enum {
502 FRC_NORMAL,
503 FRC_ITALIC,
504 FRC_BOLD,
505 FRC_ITALICBOLD
506 };
507
508 typedef struct {
509 XftFont *font;
510 int flags;
511 } Fontcache;
512
513 /* Fontcache is an array now. A new font will be appended to the array. */
514 static Fontcache frc[16];
515 static int frclen = 0;
516
517 ssize_t
518 xwrite(int fd, char *s, size_t len) {
519 size_t aux = len;
520
521 while(len > 0) {
522 ssize_t r = write(fd, s, len);
523 if(r < 0)
524 return r;
525 len -= r;
526 s += r;
527 }
528 return aux;
529 }
530
531 void *
532 xmalloc(size_t len) {
533 void *p = malloc(len);
534
535 if(!p)
536 die("Out of memory\n");
537
538 return p;
539 }
540
541 void *
542 xrealloc(void *p, size_t len) {
543 if((p = realloc(p, len)) == NULL)
544 die("Out of memory\n");
545
546 return p;
547 }
548
549 char *
550 xstrdup(char *s) {
551 char *p = strdup(s);
552
553 if (!p)
554 die("Out of memory\n");
555
556 return p;
557 }
558
559 size_t
560 utf8decode(char *c, long *u, size_t clen) {
561 size_t i, j, len, type;
562 long udecoded;
563
564 *u = UTF_INVALID;
565 if(!clen)
566 return 0;
567 udecoded = utf8decodebyte(c[0], &len);
568 if(!BETWEEN(len, 1, UTF_SIZ))
569 return 1;
570 for(i = 1, j = 1; i < clen && j < len; ++i, ++j) {
571 udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
572 if(type != 0)
573 return j;
574 }
575 if(j < len)
576 return 0;
577 *u = udecoded;
578 utf8validate(u, len);
579 return len;
580 }
581
582 long
583 utf8decodebyte(char c, size_t *i) {
584 for(*i = 0; *i < LEN(utfmask); ++(*i))
585 if(((uchar)c & utfmask[*i]) == utfbyte[*i])
586 return (uchar)c & ~utfmask[*i];
587 return 0;
588 }
589
590 size_t
591 utf8encode(long u, char *c, size_t clen) {
592 size_t len, i;
593
594 len = utf8validate(&u, 0);
595 if(clen < len)
596 return 0;
597 for(i = len - 1; i != 0; --i) {
598 c[i] = utf8encodebyte(u, 0);
599 u >>= 6;
600 }
601 c[0] = utf8encodebyte(u, len);
602 return len;
603 }
604
605 char
606 utf8encodebyte(long u, size_t i) {
607 return utfbyte[i] | (u & ~utfmask[i]);
608 }
609
610 size_t
611 utf8len(char *c) {
612 return utf8decode(c, &(long){0}, UTF_SIZ);
613 }
614
615 size_t
616 utf8validate(long *u, size_t i) {
617 if(!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF))
618 *u = UTF_INVALID;
619 for(i = 1; *u > utfmax[i]; ++i)
620 ;
621 return i;
622 }
623
624 static void
625 selinit(void) {
626 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
627 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
628 sel.mode = 0;
629 sel.ob.x = -1;
630 sel.clip = NULL;
631 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
632 if(sel.xtarget == None)
633 sel.xtarget = XA_STRING;
634 }
635
636 static int
637 x2col(int x) {
638 x -= borderpx;
639 x /= xw.cw;
640
641 return LIMIT(x, 0, term.col-1);
642 }
643
644 static int
645 y2row(int y) {
646 y -= borderpx;
647 y /= xw.ch;
648
649 return LIMIT(y, 0, term.row-1);
650 }
651
652 static void
653 selsort(void) {
654 if(sel.ob.y == sel.oe.y) {
655 sel.nb.x = MIN(sel.ob.x, sel.oe.x);
656 sel.ne.x = MAX(sel.ob.x, sel.oe.x);
657 } else {
658 sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
659 sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
660 }
661 sel.nb.y = MIN(sel.ob.y, sel.oe.y);
662 sel.ne.y = MAX(sel.ob.y, sel.oe.y);
663 }
664
665 static inline bool
666 selected(int x, int y) {
667 if(sel.ne.y == y && sel.nb.y == y)
668 return BETWEEN(x, sel.nb.x, sel.ne.x);
669
670 if(sel.type == SEL_RECTANGULAR) {
671 return ((sel.nb.y <= y && y <= sel.ne.y)
672 && (sel.nb.x <= x && x <= sel.ne.x));
673 }
674
675 return ((sel.nb.y < y && y < sel.ne.y)
676 || (y == sel.ne.y && x <= sel.ne.x))
677 || (y == sel.nb.y && x >= sel.nb.x
678 && (x <= sel.ne.x || sel.nb.y != sel.ne.y));
679 }
680
681 void
682 selsnap(int mode, int *x, int *y, int direction) {
683 int i;
684
685 switch(mode) {
686 case SNAP_WORD:
687 /*
688 * Snap around if the word wraps around at the end or
689 * beginning of a line.
690 */
691 for(;;) {
692 if(direction < 0 && *x <= 0) {
693 if(*y > 0 && term.line[*y - 1][term.col-1].mode
694 & ATTR_WRAP) {
695 *y -= 1;
696 *x = term.col-1;
697 } else {
698 break;
699 }
700 }
701 if(direction > 0 && *x >= term.col-1) {
702 if(*y < term.row-1 && term.line[*y][*x].mode
703 & ATTR_WRAP) {
704 *y += 1;
705 *x = 0;
706 } else {
707 break;
708 }
709 }
710
711 if(term.line[*y][*x+direction].mode & ATTR_WDUMMY) {
712 *x += direction;
713 continue;
714 }
715
716 if(strchr(worddelimiters,
717 term.line[*y][*x+direction].c[0])) {
718 break;
719 }
720
721 *x += direction;
722 }
723 break;
724 case SNAP_LINE:
725 /*
726 * Snap around if the the previous line or the current one
727 * has set ATTR_WRAP at its end. Then the whole next or
728 * previous line will be selected.
729 */
730 *x = (direction < 0) ? 0 : term.col - 1;
731 if(direction < 0 && *y > 0) {
732 for(; *y > 0; *y += direction) {
733 if(!(term.line[*y-1][term.col-1].mode
734 & ATTR_WRAP)) {
735 break;
736 }
737 }
738 } else if(direction > 0 && *y < term.row-1) {
739 for(; *y < term.row; *y += direction) {
740 if(!(term.line[*y][term.col-1].mode
741 & ATTR_WRAP)) {
742 break;
743 }
744 }
745 }
746 break;
747 default:
748 /*
749 * Select the whole line when the end of line is reached.
750 */
751 if(direction > 0) {
752 i = term.col;
753 while(--i > 0 && term.line[*y][i].c[0] == ' ')
754 /* nothing */;
755 if(i > 0 && i < *x)
756 *x = term.col - 1;
757 }
758 break;
759 }
760 }
761
762 void
763 getbuttoninfo(XEvent *e) {
764 int type;
765 uint state = e->xbutton.state &~Button1Mask;
766
767 sel.alt = IS_SET(MODE_ALTSCREEN);
768
769 sel.oe.x = x2col(e->xbutton.x);
770 sel.oe.y = y2row(e->xbutton.y);
771
772 if(sel.ob.y < sel.oe.y
773 || (sel.ob.y == sel.oe.y && sel.ob.x < sel.oe.x)) {
774 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
775 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
776 } else {
777 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, -1);
778 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, +1);
779 }
780 selsort();
781
782 sel.type = SEL_REGULAR;
783 for(type = 1; type < LEN(selmasks); ++type) {
784 if(match(selmasks[type], state)) {
785 sel.type = type;
786 break;
787 }
788 }
789 }
790
791 void
792 mousereport(XEvent *e) {
793 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
794 button = e->xbutton.button, state = e->xbutton.state,
795 len;
796 char buf[40];
797 static int ox, oy;
798
799 /* from urxvt */
800 if(e->xbutton.type == MotionNotify) {
801 if(x == ox && y == oy)
802 return;
803 if(!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
804 return;
805 /* MOUSE_MOTION: no reporting if no button is pressed */
806 if(IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
807 return;
808
809 button = oldbutton + 32;
810 ox = x;
811 oy = y;
812 } else {
813 if(!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
814 button = 3;
815 } else {
816 button -= Button1;
817 if(button >= 3)
818 button += 64 - 3;
819 }
820 if(e->xbutton.type == ButtonPress) {
821 oldbutton = button;
822 ox = x;
823 oy = y;
824 } else if(e->xbutton.type == ButtonRelease) {
825 oldbutton = 3;
826 /* MODE_MOUSEX10: no button release reporting */
827 if(IS_SET(MODE_MOUSEX10))
828 return;
829 }
830 }
831
832 if(!IS_SET(MODE_MOUSEX10)) {
833 button += (state & ShiftMask ? 4 : 0)
834 + (state & Mod4Mask ? 8 : 0)
835 + (state & ControlMask ? 16 : 0);
836 }
837
838 len = 0;
839 if(IS_SET(MODE_MOUSESGR)) {
840 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
841 button, x+1, y+1,
842 e->xbutton.type == ButtonRelease ? 'm' : 'M');
843 } else if(x < 223 && y < 223) {
844 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
845 32+button, 32+x+1, 32+y+1);
846 } else {
847 return;
848 }
849
850 ttywrite(buf, len);
851 }
852
853 void
854 bpress(XEvent *e) {
855 struct timeval now;
856 Mousekey *mk;
857
858 if(IS_SET(MODE_MOUSE)) {
859 mousereport(e);
860 return;
861 }
862
863 for(mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
864 if(e->xbutton.button == mk->b
865 && match(mk->mask, e->xbutton.state)) {
866 ttysend(mk->s, strlen(mk->s));
867 return;
868 }
869 }
870
871 if(e->xbutton.button == Button1) {
872 gettimeofday(&now, NULL);
873
874 /* Clear previous selection, logically and visually. */
875 selclear(NULL);
876 sel.mode = 1;
877 sel.type = SEL_REGULAR;
878 sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
879 sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
880
881 /*
882 * If the user clicks below predefined timeouts specific
883 * snapping behaviour is exposed.
884 */
885 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
886 sel.snap = SNAP_LINE;
887 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
888 sel.snap = SNAP_WORD;
889 } else {
890 sel.snap = 0;
891 }
892 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
893 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
894 selsort();
895
896 /*
897 * Draw selection, unless it's regular and we don't want to
898 * make clicks visible
899 */
900 if(sel.snap != 0) {
901 sel.mode++;
902 tsetdirt(sel.nb.y, sel.ne.y);
903 }
904 sel.tclick2 = sel.tclick1;
905 sel.tclick1 = now;
906 }
907 }
908
909 char *
910 getsel(void) {
911 char *str, *ptr;
912 int x, y, bufsize, size, i, ex;
913 Glyph *gp, *last;
914
915 if(sel.ob.x == -1) {
916 str = NULL;
917 } else {
918 bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
919 ptr = str = xmalloc(bufsize);
920
921 /* append every set & selected glyph to the selection */
922 for(y = sel.nb.y; y < sel.ne.y + 1; y++) {
923 gp = &term.line[y][0];
924 last = &gp[term.col-1];
925
926 while(last >= gp && !(selected(last - gp, y) &&
927 strcmp(last->c, " ") != 0)) {
928 --last;
929 }
930
931 for(x = 0; gp <= last; x++, ++gp) {
932 if(!selected(x, y) || (gp->mode & ATTR_WDUMMY))
933 continue;
934
935 size = utf8len(gp->c);
936 memcpy(ptr, gp->c, size);
937 ptr += size;
938 }
939
940 /*
941 * Copy and pasting of line endings is inconsistent
942 * in the inconsistent terminal and GUI world.
943 * The best solution seems like to produce '\n' when
944 * something is copied from st and convert '\n' to
945 * '\r', when something to be pasted is received by
946 * st.
947 * FIXME: Fix the computer world.
948 */
949 if(y < sel.ne.y && x > 0 && !((gp-1)->mode & ATTR_WRAP))
950 *ptr++ = '\n';
951
952 /*
953 * If the last selected line expands in the selection
954 * after the visible text '\n' is appended.
955 */
956 if(y == sel.ne.y) {
957 i = term.col;
958 while(--i > 0 && term.line[y][i].c[0] == ' ')
959 /* nothing */;
960 ex = sel.ne.x;
961 if(sel.nb.y == sel.ne.y && sel.ne.x < sel.nb.x)
962 ex = sel.nb.x;
963 if(i < ex)
964 *ptr++ = '\n';
965 }
966 }
967 *ptr = 0;
968 }
969 return str;
970 }
971
972 void
973 selcopy(void) {
974 xsetsel(getsel());
975 }
976
977 void
978 selnotify(XEvent *e) {
979 ulong nitems, ofs, rem;
980 int format;
981 uchar *data, *last, *repl;
982 Atom type;
983
984 ofs = 0;
985 do {
986 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
987 False, AnyPropertyType, &type, &format,
988 &nitems, &rem, &data)) {
989 fprintf(stderr, "Clipboard allocation failed\n");
990 return;
991 }
992
993 /*
994 * As seen in selcopy:
995 * Line endings are inconsistent in the terminal and GUI world
996 * copy and pasting. When receiving some selection data,
997 * replace all '\n' with '\r'.
998 * FIXME: Fix the computer world.
999 */
1000 repl = data;
1001 last = data + nitems * format / 8;
1002 while((repl = memchr(repl, '\n', last - repl))) {
1003 *repl++ = '\r';
1004 }
1005
1006 if(IS_SET(MODE_BRCKTPASTE))
1007 ttywrite("\033[200~", 6);
1008 ttysend((char *)data, nitems * format / 8);
1009 if(IS_SET(MODE_BRCKTPASTE))
1010 ttywrite("\033[201~", 6);
1011 XFree(data);
1012 /* number of 32-bit chunks returned */
1013 ofs += nitems * format / 32;
1014 } while(rem > 0);
1015 }
1016
1017 void
1018 selpaste(const Arg *dummy) {
1019 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
1020 xw.win, CurrentTime);
1021 }
1022
1023 void
1024 clippaste(const Arg *dummy) {
1025 Atom clipboard;
1026
1027 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1028 XConvertSelection(xw.dpy, clipboard, sel.xtarget, XA_PRIMARY,
1029 xw.win, CurrentTime);
1030 }
1031
1032 void
1033 selclear(XEvent *e) {
1034 if(sel.ob.x == -1)
1035 return;
1036 sel.ob.x = -1;
1037 tsetdirt(sel.nb.y, sel.ne.y);
1038 }
1039
1040 void
1041 selrequest(XEvent *e) {
1042 XSelectionRequestEvent *xsre;
1043 XSelectionEvent xev;
1044 Atom xa_targets, string;
1045
1046 xsre = (XSelectionRequestEvent *) e;
1047 xev.type = SelectionNotify;
1048 xev.requestor = xsre->requestor;
1049 xev.selection = xsre->selection;
1050 xev.target = xsre->target;
1051 xev.time = xsre->time;
1052 /* reject */
1053 xev.property = None;
1054
1055 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
1056 if(xsre->target == xa_targets) {
1057 /* respond with the supported type */
1058 string = sel.xtarget;
1059 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1060 XA_ATOM, 32, PropModeReplace,
1061 (uchar *) &string, 1);
1062 xev.property = xsre->property;
1063 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
1064 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1065 xsre->target, 8, PropModeReplace,
1066 (uchar *) sel.clip, strlen(sel.clip));
1067 xev.property = xsre->property;
1068 }
1069
1070 /* all done, send a notification to the listener */
1071 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
1072 fprintf(stderr, "Error sending SelectionNotify event\n");
1073 }
1074
1075 void
1076 xsetsel(char *str) {
1077 /* register the selection for both the clipboard and the primary */
1078 Atom clipboard;
1079
1080 free(sel.clip);
1081 sel.clip = str;
1082
1083 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
1084
1085 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1086 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
1087 }
1088
1089 void
1090 brelease(XEvent *e) {
1091 if(IS_SET(MODE_MOUSE)) {
1092 mousereport(e);
1093 return;
1094 }
1095
1096 if(e->xbutton.button == Button2) {
1097 selpaste(NULL);
1098 } else if(e->xbutton.button == Button1) {
1099 if(sel.mode < 2) {
1100 selclear(NULL);
1101 } else {
1102 getbuttoninfo(e);
1103 selcopy();
1104 }
1105 sel.mode = 0;
1106 tsetdirt(sel.nb.y, sel.ne.y);
1107 }
1108 }
1109
1110 void
1111 bmotion(XEvent *e) {
1112 int oldey, oldex, oldsby, oldsey;
1113
1114 if(IS_SET(MODE_MOUSE)) {
1115 mousereport(e);
1116 return;
1117 }
1118
1119 if(!sel.mode)
1120 return;
1121
1122 sel.mode++;
1123 oldey = sel.oe.y;
1124 oldex = sel.oe.x;
1125 oldsby = sel.nb.y;
1126 oldsey = sel.ne.y;
1127 getbuttoninfo(e);
1128
1129 if(oldey != sel.oe.y || oldex != sel.oe.x)
1130 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
1131 }
1132
1133 void
1134 die(const char *errstr, ...) {
1135 va_list ap;
1136
1137 va_start(ap, errstr);
1138 vfprintf(stderr, errstr, ap);
1139 va_end(ap);
1140 exit(EXIT_FAILURE);
1141 }
1142
1143 void
1144 execsh(void) {
1145 char **args;
1146 char *envshell = getenv("SHELL");
1147 const struct passwd *pass = getpwuid(getuid());
1148 char buf[sizeof(long) * 8 + 1];
1149
1150 unsetenv("COLUMNS");
1151 unsetenv("LINES");
1152 unsetenv("TERMCAP");
1153
1154 if(pass) {
1155 setenv("LOGNAME", pass->pw_name, 1);
1156 setenv("USER", pass->pw_name, 1);
1157 setenv("SHELL", pass->pw_shell, 0);
1158 setenv("HOME", pass->pw_dir, 0);
1159 }
1160
1161 snprintf(buf, sizeof(buf), "%lu", xw.win);
1162 setenv("WINDOWID", buf, 1);
1163
1164 signal(SIGCHLD, SIG_DFL);
1165 signal(SIGHUP, SIG_DFL);
1166 signal(SIGINT, SIG_DFL);
1167 signal(SIGQUIT, SIG_DFL);
1168 signal(SIGTERM, SIG_DFL);
1169 signal(SIGALRM, SIG_DFL);
1170
1171 DEFAULT(envshell, shell);
1172 setenv("TERM", termname, 1);
1173 args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
1174 execvp(args[0], args);
1175 exit(EXIT_FAILURE);
1176 }
1177
1178 void
1179 sigchld(int a) {
1180 int stat = 0;
1181
1182 if(waitpid(pid, &stat, 0) < 0)
1183 die("Waiting for pid %hd failed: %s\n", pid, strerror(errno));
1184
1185 if(WIFEXITED(stat)) {
1186 exit(WEXITSTATUS(stat));
1187 } else {
1188 exit(EXIT_FAILURE);
1189 }
1190 }
1191
1192 void
1193 ttynew(void) {
1194 int m, s;
1195 struct winsize w = {term.row, term.col, 0, 0};
1196
1197 /* seems to work fine on linux, openbsd and freebsd */
1198 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1199 die("openpty failed: %s\n", strerror(errno));
1200
1201 switch(pid = fork()) {
1202 case -1:
1203 die("fork failed\n");
1204 break;
1205 case 0:
1206 setsid(); /* create a new process group */
1207 dup2(s, STDIN_FILENO);
1208 dup2(s, STDOUT_FILENO);
1209 dup2(s, STDERR_FILENO);
1210 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1211 die("ioctl TIOCSCTTY failed: %s\n", strerror(errno));
1212 close(s);
1213 close(m);
1214 execsh();
1215 break;
1216 default:
1217 close(s);
1218 cmdfd = m;
1219 signal(SIGCHLD, sigchld);
1220 if(opt_io) {
1221 term.mode |= MODE_PRINT;
1222 iofd = (!strcmp(opt_io, "-")) ?
1223 STDOUT_FILENO :
1224 open(opt_io, O_WRONLY | O_CREAT, 0666);
1225 if(iofd < 0) {
1226 fprintf(stderr, "Error opening %s:%s\n",
1227 opt_io, strerror(errno));
1228 }
1229 }
1230 }
1231 }
1232
1233 void
1234 dump(char c) {
1235 static int col;
1236
1237 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
1238 if(++col % 10 == 0)
1239 fprintf(stderr, "\n");
1240 }
1241
1242 void
1243 ttyread(void) {
1244 static char buf[BUFSIZ];
1245 static int buflen = 0;
1246 char *ptr;
1247 char s[UTF_SIZ];
1248 int charsize; /* size of utf8 char in bytes */
1249 long unicodep;
1250 int ret;
1251
1252 /* append read bytes to unprocessed bytes */
1253 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1254 die("Couldn't read from shell: %s\n", strerror(errno));
1255
1256 /* process every complete utf8 char */
1257 buflen += ret;
1258 ptr = buf;
1259 while((charsize = utf8decode(ptr, &unicodep, buflen))) {
1260 utf8encode(unicodep, s, UTF_SIZ);
1261 tputc(s, charsize);
1262 ptr += charsize;
1263 buflen -= charsize;
1264 }
1265
1266 /* keep any uncomplete utf8 char for the next call */
1267 memmove(buf, ptr, buflen);
1268 }
1269
1270 void
1271 ttywrite(const char *s, size_t n) {
1272 if(write(cmdfd, s, n) == -1)
1273 die("write error on tty: %s\n", strerror(errno));
1274 }
1275
1276 void
1277 ttysend(char *s, size_t n) {
1278 ttywrite(s, n);
1279 if(IS_SET(MODE_ECHO))
1280 techo(s, n);
1281 }
1282
1283 void
1284 ttyresize(void) {
1285 struct winsize w;
1286
1287 w.ws_row = term.row;
1288 w.ws_col = term.col;
1289 w.ws_xpixel = xw.tw;
1290 w.ws_ypixel = xw.th;
1291 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1292 fprintf(stderr, "Couldn't set window size: %s\n", strerror(errno));
1293 }
1294
1295 int
1296 tattrset(int attr) {
1297 int i, j;
1298
1299 for(i = 0; i < term.row-1; i++) {
1300 for(j = 0; j < term.col-1; j++) {
1301 if(term.line[i][j].mode & attr)
1302 return 1;
1303 }
1304 }
1305
1306 return 0;
1307 }
1308
1309 void
1310 tsetdirt(int top, int bot) {
1311 int i;
1312
1313 LIMIT(top, 0, term.row-1);
1314 LIMIT(bot, 0, term.row-1);
1315
1316 for(i = top; i <= bot; i++)
1317 term.dirty[i] = 1;
1318 }
1319
1320 void
1321 tsetdirtattr(int attr) {
1322 int i, j;
1323
1324 for(i = 0; i < term.row-1; i++) {
1325 for(j = 0; j < term.col-1; j++) {
1326 if(term.line[i][j].mode & attr) {
1327 tsetdirt(i, i);
1328 break;
1329 }
1330 }
1331 }
1332 }
1333
1334 void
1335 tfulldirt(void) {
1336 tsetdirt(0, term.row-1);
1337 }
1338
1339 void
1340 tcursor(int mode) {
1341 static TCursor c[2];
1342 bool alt = IS_SET(MODE_ALTSCREEN);
1343
1344 if(mode == CURSOR_SAVE) {
1345 c[alt] = term.c;
1346 } else if(mode == CURSOR_LOAD) {
1347 term.c = c[alt];
1348 tmoveto(c[alt].x, c[alt].y);
1349 }
1350 }
1351
1352 void
1353 treset(void) {
1354 uint i;
1355
1356 term.c = (TCursor){{
1357 .mode = ATTR_NULL,
1358 .fg = defaultfg,
1359 .bg = defaultbg
1360 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1361
1362 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1363 for(i = tabspaces; i < term.col; i += tabspaces)
1364 term.tabs[i] = 1;
1365 term.top = 0;
1366 term.bot = term.row - 1;
1367 term.mode = MODE_WRAP;
1368 memset(term.trantbl, sizeof(term.trantbl), CS_USA);
1369 term.charset = 0;
1370
1371 tclearregion(0, 0, term.col-1, term.row-1);
1372 tmoveto(0, 0);
1373 tcursor(CURSOR_SAVE);
1374 }
1375
1376 void
1377 tnew(int col, int row) {
1378 term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } };
1379 tresize(col, row);
1380 term.numlock = 1;
1381
1382 treset();
1383 }
1384
1385 void
1386 tswapscreen(void) {
1387 Line *tmp = term.line;
1388
1389 term.line = term.alt;
1390 term.alt = tmp;
1391 term.mode ^= MODE_ALTSCREEN;
1392 tfulldirt();
1393 }
1394
1395 void
1396 tscrolldown(int orig, int n) {
1397 int i;
1398 Line temp;
1399
1400 LIMIT(n, 0, term.bot-orig+1);
1401
1402 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1403
1404 for(i = term.bot; i >= orig+n; i--) {
1405 temp = term.line[i];
1406 term.line[i] = term.line[i-n];
1407 term.line[i-n] = temp;
1408
1409 term.dirty[i] = 1;
1410 term.dirty[i-n] = 1;
1411 }
1412
1413 selscroll(orig, n);
1414 }
1415
1416 void
1417 tscrollup(int orig, int n) {
1418 int i;
1419 Line temp;
1420 LIMIT(n, 0, term.bot-orig+1);
1421
1422 tclearregion(0, orig, term.col-1, orig+n-1);
1423
1424 for(i = orig; i <= term.bot-n; i++) {
1425 temp = term.line[i];
1426 term.line[i] = term.line[i+n];
1427 term.line[i+n] = temp;
1428
1429 term.dirty[i] = 1;
1430 term.dirty[i+n] = 1;
1431 }
1432
1433 selscroll(orig, -n);
1434 }
1435
1436 void
1437 selscroll(int orig, int n) {
1438 if(sel.ob.x == -1)
1439 return;
1440
1441 if(BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
1442 if((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
1443 selclear(NULL);
1444 return;
1445 }
1446 if(sel.type == SEL_RECTANGULAR) {
1447 if(sel.ob.y < term.top)
1448 sel.ob.y = term.top;
1449 if(sel.oe.y > term.bot)
1450 sel.oe.y = term.bot;
1451 } else {
1452 if(sel.ob.y < term.top) {
1453 sel.ob.y = term.top;
1454 sel.ob.x = 0;
1455 }
1456 if(sel.oe.y > term.bot) {
1457 sel.oe.y = term.bot;
1458 sel.oe.x = term.col;
1459 }
1460 }
1461 selsort();
1462 }
1463 }
1464
1465 void
1466 tnewline(int first_col) {
1467 int y = term.c.y;
1468
1469 if(y == term.bot) {
1470 tscrollup(term.top, 1);
1471 } else {
1472 y++;
1473 }
1474 tmoveto(first_col ? 0 : term.c.x, y);
1475 }
1476
1477 void
1478 csiparse(void) {
1479 char *p = csiescseq.buf, *np;
1480 long int v;
1481
1482 csiescseq.narg = 0;
1483 if(*p == '?') {
1484 csiescseq.priv = 1;
1485 p++;
1486 }
1487
1488 csiescseq.buf[csiescseq.len] = '\0';
1489 while(p < csiescseq.buf+csiescseq.len) {
1490 np = NULL;
1491 v = strtol(p, &np, 10);
1492 if(np == p)
1493 v = 0;
1494 if(v == LONG_MAX || v == LONG_MIN)
1495 v = -1;
1496 csiescseq.arg[csiescseq.narg++] = v;
1497 p = np;
1498 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1499 break;
1500 p++;
1501 }
1502 csiescseq.mode = *p;
1503 }
1504
1505 /* for absolute user moves, when decom is set */
1506 void
1507 tmoveato(int x, int y) {
1508 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1509 }
1510
1511 void
1512 tmoveto(int x, int y) {
1513 int miny, maxy;
1514
1515 if(term.c.state & CURSOR_ORIGIN) {
1516 miny = term.top;
1517 maxy = term.bot;
1518 } else {
1519 miny = 0;
1520 maxy = term.row - 1;
1521 }
1522 LIMIT(x, 0, term.col-1);
1523 LIMIT(y, miny, maxy);
1524 term.c.state &= ~CURSOR_WRAPNEXT;
1525 term.c.x = x;
1526 term.c.y = y;
1527 }
1528
1529 void
1530 tsetchar(char *c, Glyph *attr, int x, int y) {
1531 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1532 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1533 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1534 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1535 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1536 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1537 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1538 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1539 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1540 };
1541
1542 /*
1543 * The table is proudly stolen from rxvt.
1544 */
1545 if(attr->mode & ATTR_GFX) {
1546 if(c[0] >= 0x41 && c[0] <= 0x7e
1547 && vt100_0[c[0] - 0x41]) {
1548 c = vt100_0[c[0] - 0x41];
1549 }
1550 }
1551
1552 if(term.line[y][x].mode & ATTR_WIDE) {
1553 if(x+1 < term.col) {
1554 term.line[y][x+1].c[0] = ' ';
1555 term.line[y][x+1].mode &= ~ATTR_WDUMMY;
1556 }
1557 } else if(term.line[y][x].mode & ATTR_WDUMMY) {
1558 term.line[y][x-1].c[0] = ' ';
1559 term.line[y][x-1].mode &= ~ATTR_WIDE;
1560 }
1561
1562 term.dirty[y] = 1;
1563 term.line[y][x] = *attr;
1564 memcpy(term.line[y][x].c, c, UTF_SIZ);
1565 }
1566
1567 void
1568 tclearregion(int x1, int y1, int x2, int y2) {
1569 int x, y, temp;
1570
1571 if(x1 > x2)
1572 temp = x1, x1 = x2, x2 = temp;
1573 if(y1 > y2)
1574 temp = y1, y1 = y2, y2 = temp;
1575
1576 LIMIT(x1, 0, term.col-1);
1577 LIMIT(x2, 0, term.col-1);
1578 LIMIT(y1, 0, term.row-1);
1579 LIMIT(y2, 0, term.row-1);
1580
1581 for(y = y1; y <= y2; y++) {
1582 term.dirty[y] = 1;
1583 for(x = x1; x <= x2; x++) {
1584 if(selected(x, y))
1585 selclear(NULL);
1586 term.line[y][x] = term.c.attr;
1587 memcpy(term.line[y][x].c, " ", 2);
1588 }
1589 }
1590 }
1591
1592 void
1593 tdeletechar(int n) {
1594 int src = term.c.x + n;
1595 int dst = term.c.x;
1596 int size = term.col - src;
1597
1598 term.dirty[term.c.y] = 1;
1599
1600 if(src >= term.col) {
1601 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1602 return;
1603 }
1604
1605 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1606 size * sizeof(Glyph));
1607 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1608 }
1609
1610 void
1611 tinsertblank(int n) {
1612 int src = term.c.x;
1613 int dst = src + n;
1614 int size = term.col - dst;
1615
1616 term.dirty[term.c.y] = 1;
1617
1618 if(dst >= term.col) {
1619 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1620 return;
1621 }
1622
1623 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1624 size * sizeof(Glyph));
1625 tclearregion(src, term.c.y, dst - 1, term.c.y);
1626 }
1627
1628 void
1629 tinsertblankline(int n) {
1630 if(term.c.y < term.top || term.c.y > term.bot)
1631 return;
1632
1633 tscrolldown(term.c.y, n);
1634 }
1635
1636 void
1637 tdeleteline(int n) {
1638 if(term.c.y < term.top || term.c.y > term.bot)
1639 return;
1640
1641 tscrollup(term.c.y, n);
1642 }
1643
1644 int32_t
1645 tdefcolor(int *attr, int *npar, int l) {
1646 int32_t idx = -1;
1647 uint r, g, b;
1648
1649 switch (attr[*npar + 1]) {
1650 case 2: /* direct colour in RGB space */
1651 if (*npar + 4 >= l) {
1652 fprintf(stderr,
1653 "erresc(38): Incorrect number of parameters (%d)\n",
1654 *npar);
1655 break;
1656 }
1657 r = attr[*npar + 2];
1658 g = attr[*npar + 3];
1659 b = attr[*npar + 4];
1660 *npar += 4;
1661 if(!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
1662 fprintf(stderr, "erresc: bad rgb color (%d,%d,%d)\n",
1663 r, g, b);
1664 else
1665 idx = TRUECOLOR(r, g, b);
1666 break;
1667 case 5: /* indexed colour */
1668 if (*npar + 2 >= l) {
1669 fprintf(stderr,
1670 "erresc(38): Incorrect number of parameters (%d)\n",
1671 *npar);
1672 break;
1673 }
1674 *npar += 2;
1675 if(!BETWEEN(attr[*npar], 0, 255))
1676 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
1677 else
1678 idx = attr[*npar];
1679 break;
1680 case 0: /* implemented defined (only foreground) */
1681 case 1: /* transparent */
1682 case 3: /* direct colour in CMY space */
1683 case 4: /* direct colour in CMYK space */
1684 default:
1685 fprintf(stderr,
1686 "erresc(38): gfx attr %d unknown\n", attr[*npar]);
1687 }
1688
1689 return idx;
1690 }
1691
1692 void
1693 tsetattr(int *attr, int l) {
1694 int i;
1695 int32_t idx;
1696
1697 for(i = 0; i < l; i++) {
1698 switch(attr[i]) {
1699 case 0:
1700 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE \
1701 | ATTR_BOLD | ATTR_ITALIC \
1702 | ATTR_BLINK);
1703 term.c.attr.fg = defaultfg;
1704 term.c.attr.bg = defaultbg;
1705 break;
1706 case 1:
1707 term.c.attr.mode |= ATTR_BOLD;
1708 break;
1709 case 3:
1710 term.c.attr.mode |= ATTR_ITALIC;
1711 break;
1712 case 4:
1713 term.c.attr.mode |= ATTR_UNDERLINE;
1714 break;
1715 case 5: /* slow blink */
1716 case 6: /* rapid blink */
1717 term.c.attr.mode |= ATTR_BLINK;
1718 break;
1719 case 7:
1720 term.c.attr.mode |= ATTR_REVERSE;
1721 break;
1722 case 21:
1723 case 22:
1724 term.c.attr.mode &= ~ATTR_BOLD;
1725 break;
1726 case 23:
1727 term.c.attr.mode &= ~ATTR_ITALIC;
1728 break;
1729 case 24:
1730 term.c.attr.mode &= ~ATTR_UNDERLINE;
1731 break;
1732 case 25:
1733 case 26:
1734 term.c.attr.mode &= ~ATTR_BLINK;
1735 break;
1736 case 27:
1737 term.c.attr.mode &= ~ATTR_REVERSE;
1738 break;
1739 case 38:
1740 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1741 term.c.attr.fg = idx;
1742 break;
1743 case 39:
1744 term.c.attr.fg = defaultfg;
1745 break;
1746 case 48:
1747 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1748 term.c.attr.bg = idx;
1749 break;
1750 case 49:
1751 term.c.attr.bg = defaultbg;
1752 break;
1753 default:
1754 if(BETWEEN(attr[i], 30, 37)) {
1755 term.c.attr.fg = attr[i] - 30;
1756 } else if(BETWEEN(attr[i], 40, 47)) {
1757 term.c.attr.bg = attr[i] - 40;
1758 } else if(BETWEEN(attr[i], 90, 97)) {
1759 term.c.attr.fg = attr[i] - 90 + 8;
1760 } else if(BETWEEN(attr[i], 100, 107)) {
1761 term.c.attr.bg = attr[i] - 100 + 8;
1762 } else {
1763 fprintf(stderr,
1764 "erresc(default): gfx attr %d unknown\n",
1765 attr[i]), csidump();
1766 }
1767 break;
1768 }
1769 }
1770 }
1771
1772 void
1773 tsetscroll(int t, int b) {
1774 int temp;
1775
1776 LIMIT(t, 0, term.row-1);
1777 LIMIT(b, 0, term.row-1);
1778 if(t > b) {
1779 temp = t;
1780 t = b;
1781 b = temp;
1782 }
1783 term.top = t;
1784 term.bot = b;
1785 }
1786
1787 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1788
1789 void
1790 tsetmode(bool priv, bool set, int *args, int narg) {
1791 int *lim, mode;
1792 bool alt;
1793
1794 for(lim = args + narg; args < lim; ++args) {
1795 if(priv) {
1796 switch(*args) {
1797 break;
1798 case 1: /* DECCKM -- Cursor key */
1799 MODBIT(term.mode, set, MODE_APPCURSOR);
1800 break;
1801 case 5: /* DECSCNM -- Reverse video */
1802 mode = term.mode;
1803 MODBIT(term.mode, set, MODE_REVERSE);
1804 if(mode != term.mode)
1805 redraw(REDRAW_TIMEOUT);
1806 break;
1807 case 6: /* DECOM -- Origin */
1808 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1809 tmoveato(0, 0);
1810 break;
1811 case 7: /* DECAWM -- Auto wrap */
1812 MODBIT(term.mode, set, MODE_WRAP);
1813 break;
1814 case 0: /* Error (IGNORED) */
1815 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1816 case 3: /* DECCOLM -- Column (IGNORED) */
1817 case 4: /* DECSCLM -- Scroll (IGNORED) */
1818 case 8: /* DECARM -- Auto repeat (IGNORED) */
1819 case 18: /* DECPFF -- Printer feed (IGNORED) */
1820 case 19: /* DECPEX -- Printer extent (IGNORED) */
1821 case 42: /* DECNRCM -- National characters (IGNORED) */
1822 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1823 break;
1824 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1825 MODBIT(term.mode, !set, MODE_HIDE);
1826 break;
1827 case 9: /* X10 mouse compatibility mode */
1828 xsetpointermotion(0);
1829 MODBIT(term.mode, 0, MODE_MOUSE);
1830 MODBIT(term.mode, set, MODE_MOUSEX10);
1831 break;
1832 case 1000: /* 1000: report button press */
1833 xsetpointermotion(0);
1834 MODBIT(term.mode, 0, MODE_MOUSE);
1835 MODBIT(term.mode, set, MODE_MOUSEBTN);
1836 break;
1837 case 1002: /* 1002: report motion on button press */
1838 xsetpointermotion(0);
1839 MODBIT(term.mode, 0, MODE_MOUSE);
1840 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1841 break;
1842 case 1003: /* 1003: enable all mouse motions */
1843 xsetpointermotion(set);
1844 MODBIT(term.mode, 0, MODE_MOUSE);
1845 MODBIT(term.mode, set, MODE_MOUSEMANY);
1846 break;
1847 case 1004: /* 1004: send focus events to tty */
1848 MODBIT(term.mode, set, MODE_FOCUS);
1849 break;
1850 case 1006: /* 1006: extended reporting mode */
1851 MODBIT(term.mode, set, MODE_MOUSESGR);
1852 break;
1853 case 1034:
1854 MODBIT(term.mode, set, MODE_8BIT);
1855 break;
1856 case 1049: /* swap screen & set/restore cursor as xterm */
1857 if (!allowaltscreen)
1858 break;
1859 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1860 /* FALLTHRU */
1861 case 47: /* swap screen */
1862 case 1047:
1863 if (!allowaltscreen)
1864 break;
1865 alt = IS_SET(MODE_ALTSCREEN);
1866 if(alt) {
1867 tclearregion(0, 0, term.col-1,
1868 term.row-1);
1869 }
1870 if(set ^ alt) /* set is always 1 or 0 */
1871 tswapscreen();
1872 if(*args != 1049)
1873 break;
1874 /* FALLTRU */
1875 case 1048:
1876 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1877 break;
1878 case 2004: /* 2004: bracketed paste mode */
1879 MODBIT(term.mode, set, MODE_BRCKTPASTE);
1880 break;
1881 /* Not implemented mouse modes. See comments there. */
1882 case 1001: /* mouse highlight mode; can hang the
1883 terminal by design when implemented. */
1884 case 1005: /* UTF-8 mouse mode; will confuse
1885 applications not supporting UTF-8
1886 and luit. */
1887 case 1015: /* urxvt mangled mouse mode; incompatible
1888 and can be mistaken for other control
1889 codes. */
1890 default:
1891 fprintf(stderr,
1892 "erresc: unknown private set/reset mode %d\n",
1893 *args);
1894 break;
1895 }
1896 } else {
1897 switch(*args) {
1898 case 0: /* Error (IGNORED) */
1899 break;
1900 case 2: /* KAM -- keyboard action */
1901 MODBIT(term.mode, set, MODE_KBDLOCK);
1902 break;
1903 case 4: /* IRM -- Insertion-replacement */
1904 MODBIT(term.mode, set, MODE_INSERT);
1905 break;
1906 case 12: /* SRM -- Send/Receive */
1907 MODBIT(term.mode, !set, MODE_ECHO);
1908 break;
1909 case 20: /* LNM -- Linefeed/new line */
1910 MODBIT(term.mode, set, MODE_CRLF);
1911 break;
1912 default:
1913 fprintf(stderr,
1914 "erresc: unknown set/reset mode %d\n",
1915 *args);
1916 break;
1917 }
1918 }
1919 }
1920 }
1921
1922 void
1923 csihandle(void) {
1924 char buf[40];
1925 int len;
1926
1927 switch(csiescseq.mode) {
1928 default:
1929 unknown:
1930 fprintf(stderr, "erresc: unknown csi ");
1931 csidump();
1932 /* die(""); */
1933 break;
1934 case '@': /* ICH -- Insert <n> blank char */
1935 DEFAULT(csiescseq.arg[0], 1);
1936 tinsertblank(csiescseq.arg[0]);
1937 break;
1938 case 'A': /* CUU -- Cursor <n> Up */
1939 DEFAULT(csiescseq.arg[0], 1);
1940 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1941 break;
1942 case 'B': /* CUD -- Cursor <n> Down */
1943 case 'e': /* VPR --Cursor <n> Down */
1944 DEFAULT(csiescseq.arg[0], 1);
1945 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1946 break;
1947 case 'i': /* MC -- Media Copy */
1948 switch(csiescseq.arg[0]) {
1949 case 0:
1950 tdump();
1951 break;
1952 case 1:
1953 tdumpline(term.c.y);
1954 break;
1955 case 2:
1956 tdumpsel();
1957 break;
1958 case 4:
1959 term.mode &= ~MODE_PRINT;
1960 break;
1961 case 5:
1962 term.mode |= MODE_PRINT;
1963 break;
1964 }
1965 break;
1966 case 'c': /* DA -- Device Attributes */
1967 if(csiescseq.arg[0] == 0)
1968 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1969 break;
1970 case 'C': /* CUF -- Cursor <n> Forward */
1971 case 'a': /* HPR -- Cursor <n> Forward */
1972 DEFAULT(csiescseq.arg[0], 1);
1973 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1974 break;
1975 case 'D': /* CUB -- Cursor <n> Backward */
1976 DEFAULT(csiescseq.arg[0], 1);
1977 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1978 break;
1979 case 'E': /* CNL -- Cursor <n> Down and first col */
1980 DEFAULT(csiescseq.arg[0], 1);
1981 tmoveto(0, term.c.y+csiescseq.arg[0]);
1982 break;
1983 case 'F': /* CPL -- Cursor <n> Up and first col */
1984 DEFAULT(csiescseq.arg[0], 1);
1985 tmoveto(0, term.c.y-csiescseq.arg[0]);
1986 break;
1987 case 'g': /* TBC -- Tabulation clear */
1988 switch(csiescseq.arg[0]) {
1989 case 0: /* clear current tab stop */
1990 term.tabs[term.c.x] = 0;
1991 break;
1992 case 3: /* clear all the tabs */
1993 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1994 break;
1995 default:
1996 goto unknown;
1997 }
1998 break;
1999 case 'G': /* CHA -- Move to <col> */
2000 case '`': /* HPA */
2001 DEFAULT(csiescseq.arg[0], 1);
2002 tmoveto(csiescseq.arg[0]-1, term.c.y);
2003 break;
2004 case 'H': /* CUP -- Move to <row> <col> */
2005 case 'f': /* HVP */
2006 DEFAULT(csiescseq.arg[0], 1);
2007 DEFAULT(csiescseq.arg[1], 1);
2008 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
2009 break;
2010 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
2011 DEFAULT(csiescseq.arg[0], 1);
2012 while(csiescseq.arg[0]--)
2013 tputtab(1);
2014 break;
2015 case 'J': /* ED -- Clear screen */
2016 selclear(NULL);
2017 switch(csiescseq.arg[0]) {
2018 case 0: /* below */
2019 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
2020 if(term.c.y < term.row-1) {
2021 tclearregion(0, term.c.y+1, term.col-1,
2022 term.row-1);
2023 }
2024 break;
2025 case 1: /* above */
2026 if(term.c.y > 1)
2027 tclearregion(0, 0, term.col-1, term.c.y-1);
2028 tclearregion(0, term.c.y, term.c.x, term.c.y);
2029 break;
2030 case 2: /* all */
2031 tclearregion(0, 0, term.col-1, term.row-1);
2032 break;
2033 default:
2034 goto unknown;
2035 }
2036 break;
2037 case 'K': /* EL -- Clear line */
2038 switch(csiescseq.arg[0]) {
2039 case 0: /* right */
2040 tclearregion(term.c.x, term.c.y, term.col-1,
2041 term.c.y);
2042 break;
2043 case 1: /* left */
2044 tclearregion(0, term.c.y, term.c.x, term.c.y);
2045 break;
2046 case 2: /* all */
2047 tclearregion(0, term.c.y, term.col-1, term.c.y);
2048 break;
2049 }
2050 break;
2051 case 'S': /* SU -- Scroll <n> line up */
2052 DEFAULT(csiescseq.arg[0], 1);
2053 tscrollup(term.top, csiescseq.arg[0]);
2054 break;
2055 case 'T': /* SD -- Scroll <n> line down */
2056 DEFAULT(csiescseq.arg[0], 1);
2057 tscrolldown(term.top, csiescseq.arg[0]);
2058 break;
2059 case 'L': /* IL -- Insert <n> blank lines */
2060 DEFAULT(csiescseq.arg[0], 1);
2061 tinsertblankline(csiescseq.arg[0]);
2062 break;
2063 case 'l': /* RM -- Reset Mode */
2064 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
2065 break;
2066 case 'M': /* DL -- Delete <n> lines */
2067 DEFAULT(csiescseq.arg[0], 1);
2068 tdeleteline(csiescseq.arg[0]);
2069 break;
2070 case 'X': /* ECH -- Erase <n> char */
2071 DEFAULT(csiescseq.arg[0], 1);
2072 tclearregion(term.c.x, term.c.y,
2073 term.c.x + csiescseq.arg[0] - 1, term.c.y);
2074 break;
2075 case 'P': /* DCH -- Delete <n> char */
2076 DEFAULT(csiescseq.arg[0], 1);
2077 tdeletechar(csiescseq.arg[0]);
2078 break;
2079 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
2080 DEFAULT(csiescseq.arg[0], 1);
2081 while(csiescseq.arg[0]--)
2082 tputtab(0);
2083 break;
2084 case 'd': /* VPA -- Move to <row> */
2085 DEFAULT(csiescseq.arg[0], 1);
2086 tmoveato(term.c.x, csiescseq.arg[0]-1);
2087 break;
2088 case 'h': /* SM -- Set terminal mode */
2089 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
2090 break;
2091 case 'm': /* SGR -- Terminal attribute (color) */
2092 tsetattr(csiescseq.arg, csiescseq.narg);
2093 break;
2094 case 'n': /* DSR – Device Status Report (cursor position) */
2095 if (csiescseq.arg[0] == 6) {
2096 len = snprintf(buf, sizeof(buf),"\033[%i;%iR",
2097 term.c.y+1, term.c.x+1);
2098 ttywrite(buf, len);
2099 break;
2100 }
2101 case 'r': /* DECSTBM -- Set Scrolling Region */
2102 if(csiescseq.priv) {
2103 goto unknown;
2104 } else {
2105 DEFAULT(csiescseq.arg[0], 1);
2106 DEFAULT(csiescseq.arg[1], term.row);
2107 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
2108 tmoveato(0, 0);
2109 }
2110 break;
2111 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
2112 tcursor(CURSOR_SAVE);
2113 break;
2114 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
2115 tcursor(CURSOR_LOAD);
2116 break;
2117 }
2118 }
2119
2120 void
2121 csidump(void) {
2122 int i;
2123 uint c;
2124
2125 printf("ESC[");
2126 for(i = 0; i < csiescseq.len; i++) {
2127 c = csiescseq.buf[i] & 0xff;
2128 if(isprint(c)) {
2129 putchar(c);
2130 } else if(c == '\n') {
2131 printf("(\\n)");
2132 } else if(c == '\r') {
2133 printf("(\\r)");
2134 } else if(c == 0x1b) {
2135 printf("(\\e)");
2136 } else {
2137 printf("(%02x)", c);
2138 }
2139 }
2140 putchar('\n');
2141 }
2142
2143 void
2144 csireset(void) {
2145 memset(&csiescseq, 0, sizeof(csiescseq));
2146 }
2147
2148 void
2149 strhandle(void) {
2150 char *p = NULL;
2151 int j, narg, par;
2152
2153 strparse();
2154 narg = strescseq.narg;
2155 par = atoi(strescseq.args[0]);
2156
2157 switch(strescseq.type) {
2158 case ']': /* OSC -- Operating System Command */
2159 switch(par) {
2160 case 0:
2161 case 1:
2162 case 2:
2163 if(narg > 1)
2164 xsettitle(strescseq.args[1]);
2165 return;
2166 case 4: /* color set */
2167 if(narg < 3)
2168 break;
2169 p = strescseq.args[2];
2170 /* fall through */
2171 case 104: /* color reset, here p = NULL */
2172 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2173 if (!xsetcolorname(j, p)) {
2174 fprintf(stderr, "erresc: invalid color %s\n", p);
2175 } else {
2176 /*
2177 * TODO if defaultbg color is changed, borders
2178 * are dirty
2179 */
2180 redraw(0);
2181 }
2182 return;
2183 }
2184 break;
2185 case 'k': /* old title set compatibility */
2186 xsettitle(strescseq.args[0]);
2187 return;
2188 case 'P': /* DSC -- Device Control String */
2189 case '_': /* APC -- Application Program Command */
2190 case '^': /* PM -- Privacy Message */
2191 return;
2192 }
2193
2194 fprintf(stderr, "erresc: unknown str ");
2195 strdump();
2196 }
2197
2198 void
2199 strparse(void) {
2200 char *p = strescseq.buf;
2201
2202 strescseq.narg = 0;
2203 strescseq.buf[strescseq.len] = '\0';
2204 while(p && strescseq.narg < STR_ARG_SIZ)
2205 strescseq.args[strescseq.narg++] = strsep(&p, ";");
2206 }
2207
2208 void
2209 strdump(void) {
2210 int i;
2211 uint c;
2212
2213 printf("ESC%c", strescseq.type);
2214 for(i = 0; i < strescseq.len; i++) {
2215 c = strescseq.buf[i] & 0xff;
2216 if(c == '\0') {
2217 return;
2218 } else if(isprint(c)) {
2219 putchar(c);
2220 } else if(c == '\n') {
2221 printf("(\\n)");
2222 } else if(c == '\r') {
2223 printf("(\\r)");
2224 } else if(c == 0x1b) {
2225 printf("(\\e)");
2226 } else {
2227 printf("(%02x)", c);
2228 }
2229 }
2230 printf("ESC\\\n");
2231 }
2232
2233 void
2234 strreset(void) {
2235 memset(&strescseq, 0, sizeof(strescseq));
2236 }
2237
2238 void
2239 tprinter(char *s, size_t len) {
2240 if(iofd != -1 && xwrite(iofd, s, len) < 0) {
2241 fprintf(stderr, "Error writing in %s:%s\n",
2242 opt_io, strerror(errno));
2243 close(iofd);
2244 iofd = -1;
2245 }
2246 }
2247
2248 void
2249 toggleprinter(const Arg *arg) {
2250 term.mode ^= MODE_PRINT;
2251 }
2252
2253 void
2254 printscreen(const Arg *arg) {
2255 tdump();
2256 }
2257
2258 void
2259 printsel(const Arg *arg) {
2260 tdumpsel();
2261 }
2262
2263 void
2264 tdumpsel(void)
2265 {
2266 char *ptr;
2267
2268 if((ptr = getsel())) {
2269 tprinter(ptr, strlen(ptr));
2270 free(ptr);
2271 }
2272 }
2273
2274 void
2275 tdumpline(int n) {
2276 Glyph *bp, *end;
2277
2278 bp = &term.line[n][0];
2279 end = &bp[term.col-1];
2280 while(end > bp && !strcmp(" ", end->c))
2281 --end;
2282 if(bp != end || strcmp(bp->c, " ")) {
2283 for( ;bp <= end; ++bp)
2284 tprinter(bp->c, strlen(bp->c));
2285 }
2286 tprinter("\n", 1);
2287 }
2288
2289 void
2290 tdump(void) {
2291 int i;
2292
2293 for(i = 0; i < term.row; ++i)
2294 tdumpline(i);
2295 }
2296
2297 void
2298 tputtab(bool forward) {
2299 uint x = term.c.x;
2300
2301 if(forward) {
2302 if(x == term.col)
2303 return;
2304 for(++x; x < term.col && !term.tabs[x]; ++x)
2305 /* nothing */ ;
2306 } else {
2307 if(x == 0)
2308 return;
2309 for(--x; x > 0 && !term.tabs[x]; --x)
2310 /* nothing */ ;
2311 }
2312 tmoveto(x, term.c.y);
2313 }
2314
2315 void
2316 techo(char *buf, int len) {
2317 for(; len > 0; buf++, len--) {
2318 char c = *buf;
2319
2320 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, False);
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 XRectangle 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 draw();
3443
3444 if(timeout > 0) {
3445 nanosleep(&tv, NULL);
3446 XSync(xw.dpy, False); /* necessary for a good tput flash */
3447 }
3448 }
3449
3450 void
3451 draw(void) {
3452 drawregion(0, 0, term.col, term.row);
3453 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3454 xw.h, 0, 0);
3455 XSetForeground(xw.dpy, dc.gc,
3456 dc.col[IS_SET(MODE_REVERSE)?
3457 defaultfg : defaultbg].pixel);
3458 }
3459
3460 void
3461 drawregion(int x1, int y1, int x2, int y2) {
3462 int ic, ib, x, y, ox, sl;
3463 Glyph base, new;
3464 char buf[DRAW_BUF_SIZ];
3465 bool ena_sel = sel.ob.x != -1;
3466 long unicodep;
3467
3468 if(sel.alt ^ IS_SET(MODE_ALTSCREEN))
3469 ena_sel = 0;
3470
3471 if(!(xw.state & WIN_VISIBLE))
3472 return;
3473
3474 for(y = y1; y < y2; y++) {
3475 if(!term.dirty[y])
3476 continue;
3477
3478 xtermclear(0, y, term.col, y);
3479 term.dirty[y] = 0;
3480 base = term.line[y][0];
3481 ic = ib = ox = 0;
3482 for(x = x1; x < x2; x++) {
3483 new = term.line[y][x];
3484 if(new.mode == ATTR_WDUMMY)
3485 continue;
3486 if(ena_sel && selected(x, y))
3487 new.mode ^= ATTR_REVERSE;
3488 if(ib > 0 && (ATTRCMP(base, new)
3489 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3490 xdraws(buf, base, ox, y, ic, ib);
3491 ic = ib = 0;
3492 }
3493 if(ib == 0) {
3494 ox = x;
3495 base = new;
3496 }
3497
3498 sl = utf8decode(new.c, &unicodep, UTF_SIZ);
3499 memcpy(buf+ib, new.c, sl);
3500 ib += sl;
3501 ic += (new.mode & ATTR_WIDE)? 2 : 1;
3502 }
3503 if(ib > 0)
3504 xdraws(buf, base, ox, y, ic, ib);
3505 }
3506 xdrawcursor();
3507 }
3508
3509 void
3510 expose(XEvent *ev) {
3511 XExposeEvent *e = &ev->xexpose;
3512
3513 if(xw.state & WIN_REDRAW) {
3514 if(!e->count)
3515 xw.state &= ~WIN_REDRAW;
3516 }
3517 redraw(0);
3518 }
3519
3520 void
3521 visibility(XEvent *ev) {
3522 XVisibilityEvent *e = &ev->xvisibility;
3523
3524 if(e->state == VisibilityFullyObscured) {
3525 xw.state &= ~WIN_VISIBLE;
3526 } else if(!(xw.state & WIN_VISIBLE)) {
3527 /* need a full redraw for next Expose, not just a buf copy */
3528 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3529 }
3530 }
3531
3532 void
3533 unmap(XEvent *ev) {
3534 xw.state &= ~WIN_VISIBLE;
3535 }
3536
3537 void
3538 xsetpointermotion(int set) {
3539 MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
3540 XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
3541 }
3542
3543 void
3544 xseturgency(int add) {
3545 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3546
3547 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
3548 XSetWMHints(xw.dpy, xw.win, h);
3549 XFree(h);
3550 }
3551
3552 void
3553 focus(XEvent *ev) {
3554 XFocusChangeEvent *e = &ev->xfocus;
3555
3556 if(e->mode == NotifyGrab)
3557 return;
3558
3559 if(ev->type == FocusIn) {
3560 XSetICFocus(xw.xic);
3561 xw.state |= WIN_FOCUSED;
3562 xseturgency(0);
3563 if(IS_SET(MODE_FOCUS))
3564 ttywrite("\033[I", 3);
3565 } else {
3566 XUnsetICFocus(xw.xic);
3567 xw.state &= ~WIN_FOCUSED;
3568 if(IS_SET(MODE_FOCUS))
3569 ttywrite("\033[O", 3);
3570 }
3571 }
3572
3573 static inline bool
3574 match(uint mask, uint state) {
3575 return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
3576 }
3577
3578 void
3579 numlock(const Arg *dummy) {
3580 term.numlock ^= 1;
3581 }
3582
3583 char*
3584 kmap(KeySym k, uint state) {
3585 Key *kp;
3586 int i;
3587
3588 /* Check for mapped keys out of X11 function keys. */
3589 for(i = 0; i < LEN(mappedkeys); i++) {
3590 if(mappedkeys[i] == k)
3591 break;
3592 }
3593 if(i == LEN(mappedkeys)) {
3594 if((k & 0xFFFF) < 0xFD00)
3595 return NULL;
3596 }
3597
3598 for(kp = key; kp < key + LEN(key); kp++) {
3599 if(kp->k != k)
3600 continue;
3601
3602 if(!match(kp->mask, state))
3603 continue;
3604
3605 if(IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
3606 continue;
3607 if(term.numlock && kp->appkey == 2)
3608 continue;
3609
3610 if(IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
3611 continue;
3612
3613 if(IS_SET(MODE_CRLF) ? kp->crlf < 0 : kp->crlf > 0)
3614 continue;
3615
3616 return kp->s;
3617 }
3618
3619 return NULL;
3620 }
3621
3622 void
3623 kpress(XEvent *ev) {
3624 XKeyEvent *e = &ev->xkey;
3625 KeySym ksym;
3626 char buf[32], *customkey;
3627 int len;
3628 long c;
3629 Status status;
3630 Shortcut *bp;
3631
3632 if(IS_SET(MODE_KBDLOCK))
3633 return;
3634
3635 len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
3636 /* 1. shortcuts */
3637 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3638 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3639 bp->func(&(bp->arg));
3640 return;
3641 }
3642 }
3643
3644 /* 2. custom keys from config.h */
3645 if((customkey = kmap(ksym, e->state))) {
3646 ttysend(customkey, strlen(customkey));
3647 return;
3648 }
3649
3650 /* 3. composed string from input method */
3651 if(len == 0)
3652 return;
3653 if(len == 1 && e->state & Mod1Mask) {
3654 if(IS_SET(MODE_8BIT)) {
3655 if(*buf < 0177) {
3656 c = *buf | 0x80;
3657 len = utf8encode(c, buf, UTF_SIZ);
3658 }
3659 } else {
3660 buf[1] = buf[0];
3661 buf[0] = '\033';
3662 len = 2;
3663 }
3664 }
3665 ttysend(buf, len);
3666 }
3667
3668
3669 void
3670 cmessage(XEvent *e) {
3671 /*
3672 * See xembed specs
3673 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3674 */
3675 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3676 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3677 xw.state |= WIN_FOCUSED;
3678 xseturgency(0);
3679 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3680 xw.state &= ~WIN_FOCUSED;
3681 }
3682 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3683 /* Send SIGHUP to shell */
3684 kill(pid, SIGHUP);
3685 exit(EXIT_SUCCESS);
3686 }
3687 }
3688
3689 void
3690 cresize(int width, int height) {
3691 int col, row;
3692
3693 if(width != 0)
3694 xw.w = width;
3695 if(height != 0)
3696 xw.h = height;
3697
3698 col = (xw.w - 2 * borderpx) / xw.cw;
3699 row = (xw.h - 2 * borderpx) / xw.ch;
3700
3701 tresize(col, row);
3702 xresize(col, row);
3703 ttyresize();
3704 }
3705
3706 void
3707 resize(XEvent *e) {
3708 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3709 return;
3710
3711 cresize(e->xconfigure.width, e->xconfigure.height);
3712 }
3713
3714 void
3715 run(void) {
3716 XEvent ev;
3717 int w = xw.w, h = xw.h;
3718 fd_set rfd;
3719 int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3720 struct timeval drawtimeout, *tv = NULL, now, last, lastblink;
3721
3722 /* Waiting for window mapping */
3723 while(1) {
3724 XNextEvent(xw.dpy, &ev);
3725 if(ev.type == ConfigureNotify) {
3726 w = ev.xconfigure.width;
3727 h = ev.xconfigure.height;
3728 } else if(ev.type == MapNotify) {
3729 break;
3730 }
3731 }
3732
3733 ttynew();
3734 if(!xw.isfixed)
3735 cresize(w, h);
3736 else
3737 cresize(xw.fw, xw.fh);
3738
3739 gettimeofday(&last, NULL);
3740 lastblink = last;
3741
3742 for(xev = actionfps;;) {
3743 long deltatime;
3744
3745 FD_ZERO(&rfd);
3746 FD_SET(cmdfd, &rfd);
3747 FD_SET(xfd, &rfd);
3748
3749 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
3750 if(errno == EINTR)
3751 continue;
3752 die("select failed: %s\n", strerror(errno));
3753 }
3754 if(FD_ISSET(cmdfd, &rfd)) {
3755 ttyread();
3756 if(blinktimeout) {
3757 blinkset = tattrset(ATTR_BLINK);
3758 if(!blinkset)
3759 MODBIT(term.mode, 0, MODE_BLINK);
3760 }
3761 }
3762
3763 if(FD_ISSET(xfd, &rfd))
3764 xev = actionfps;
3765
3766 gettimeofday(&now, NULL);
3767 drawtimeout.tv_sec = 0;
3768 drawtimeout.tv_usec = (1000/xfps) * 1000;
3769 tv = &drawtimeout;
3770
3771 dodraw = 0;
3772 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
3773 tsetdirtattr(ATTR_BLINK);
3774 term.mode ^= MODE_BLINK;
3775 lastblink = now;
3776 dodraw = 1;
3777 }
3778 deltatime = TIMEDIFF(now, last);
3779 if(deltatime > (xev? (1000/xfps) : (1000/actionfps))
3780 || deltatime < 0) {
3781 dodraw = 1;
3782 last = now;
3783 }
3784
3785 if(dodraw) {
3786 while(XPending(xw.dpy)) {
3787 XNextEvent(xw.dpy, &ev);
3788 if(XFilterEvent(&ev, None))
3789 continue;
3790 if(handler[ev.type])
3791 (handler[ev.type])(&ev);
3792 }
3793
3794 draw();
3795 XFlush(xw.dpy);
3796
3797 if(xev && !FD_ISSET(xfd, &rfd))
3798 xev--;
3799 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
3800 if(blinkset) {
3801 if(TIMEDIFF(now, lastblink) \
3802 > blinktimeout) {
3803 drawtimeout.tv_usec = 1;
3804 } else {
3805 drawtimeout.tv_usec = (1000 * \
3806 (blinktimeout - \
3807 TIMEDIFF(now,
3808 lastblink)));
3809 }
3810 } else {
3811 tv = NULL;
3812 }
3813 }
3814 }
3815 }
3816 }
3817
3818 void
3819 usage(void) {
3820 die("%s " VERSION " (c) 2010-2013 st engineers\n" \
3821 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]" \
3822 " [-t title] [-w windowid] [-e command ...]\n", argv0);
3823 }
3824
3825 int
3826 main(int argc, char *argv[]) {
3827 int bitm, xr, yr;
3828 uint wr, hr;
3829 char *titles;
3830
3831 xw.fw = xw.fh = xw.fx = xw.fy = 0;
3832 xw.isfixed = False;
3833
3834 ARGBEGIN {
3835 case 'a':
3836 allowaltscreen = false;
3837 break;
3838 case 'c':
3839 opt_class = EARGF(usage());
3840 break;
3841 case 'e':
3842 /* eat all remaining arguments */
3843 if(argc > 1) {
3844 opt_cmd = &argv[1];
3845 if(argv[1] != NULL && opt_title == NULL) {
3846 titles = xstrdup(argv[1]);
3847 opt_title = basename(titles);
3848 }
3849 }
3850 goto run;
3851 case 'f':
3852 opt_font = EARGF(usage());
3853 break;
3854 case 'g':
3855 bitm = XParseGeometry(EARGF(usage()), &xr, &yr, &wr, &hr);
3856 if(bitm & XValue)
3857 xw.fx = xr;
3858 if(bitm & YValue)
3859 xw.fy = yr;
3860 if(bitm & WidthValue)
3861 xw.fw = (int)wr;
3862 if(bitm & HeightValue)
3863 xw.fh = (int)hr;
3864 if(bitm & XNegative && xw.fx == 0)
3865 xw.fx = -1;
3866 if(bitm & YNegative && xw.fy == 0)
3867 xw.fy = -1;
3868
3869 if(xw.fh != 0 && xw.fw != 0)
3870 xw.isfixed = True;
3871 break;
3872 case 'o':
3873 opt_io = EARGF(usage());
3874 break;
3875 case 't':
3876 opt_title = EARGF(usage());
3877 break;
3878 case 'w':
3879 opt_embed = EARGF(usage());
3880 break;
3881 case 'v':
3882 default:
3883 usage();
3884 } ARGEND;
3885
3886 run:
3887 setlocale(LC_CTYPE, "");
3888 XSetLocaleModifiers("");
3889 tnew(80, 24);
3890 xinit();
3891 selinit();
3892 run();
3893
3894 return 0;
3895 }
3896