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947373f7bcd4b5e876f3a5f945a4703b1ba75659
[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 <sys/ioctl.h>
15 #include <sys/select.h>
16 #include <sys/stat.h>
17 #include <sys/time.h>
18 #include <sys/types.h>
19 #include <sys/wait.h>
20 #include <time.h>
21 #include <unistd.h>
22 #include <libgen.h>
23 #include <X11/Xatom.h>
24 #include <X11/Xlib.h>
25 #include <X11/Xutil.h>
26 #include <X11/cursorfont.h>
27 #include <X11/keysym.h>
28 #include <X11/Xft/Xft.h>
29 #include <fontconfig/fontconfig.h>
30
31 #include "arg.h"
32
33 char *argv0;
34
35 #define Glyph Glyph_
36 #define Font Font_
37 #define Draw XftDraw *
38 #define Colour XftColor
39 #define Colourmap Colormap
40 #define Rectangle XRectangle
41
42 #if defined(__linux)
43 #include <pty.h>
44 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
45 #include <util.h>
46 #elif defined(__FreeBSD__) || defined(__DragonFly__)
47 #include <libutil.h>
48 #endif
49
50
51 /* XEMBED messages */
52 #define XEMBED_FOCUS_IN 4
53 #define XEMBED_FOCUS_OUT 5
54
55 /* Arbitrary sizes */
56 #define UTF_SIZ 4
57 #define ESC_BUF_SIZ (128*UTF_SIZ)
58 #define ESC_ARG_SIZ 16
59 #define STR_BUF_SIZ ESC_BUF_SIZ
60 #define STR_ARG_SIZ ESC_ARG_SIZ
61 #define DRAW_BUF_SIZ 20*1024
62 #define XK_ANY_MOD UINT_MAX
63 #define XK_NO_MOD 0
64 #define XK_SWITCH_MOD (1<<13)
65
66 #define REDRAW_TIMEOUT (80*1000) /* 80 ms */
67
68 /* macros */
69 #define SERRNO strerror(errno)
70 #define MIN(a, b) ((a) < (b) ? (a) : (b))
71 #define MAX(a, b) ((a) < (b) ? (b) : (a))
72 #define LEN(a) (sizeof(a) / sizeof(a[0]))
73 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
74 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
75 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
76 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
77 #define IS_SET(flag) ((term.mode & (flag)) != 0)
78 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_usec-t2.tv_usec)/1000)
79
80 #define VT102ID "\033[?6c"
81
82 enum glyph_attribute {
83 ATTR_NULL = 0,
84 ATTR_REVERSE = 1,
85 ATTR_UNDERLINE = 2,
86 ATTR_BOLD = 4,
87 ATTR_GFX = 8,
88 ATTR_ITALIC = 16,
89 ATTR_BLINK = 32,
90 ATTR_WRAP = 64,
91 };
92
93 enum cursor_movement {
94 CURSOR_SAVE,
95 CURSOR_LOAD
96 };
97
98 enum cursor_state {
99 CURSOR_DEFAULT = 0,
100 CURSOR_WRAPNEXT = 1,
101 CURSOR_ORIGIN = 2
102 };
103
104 enum term_mode {
105 MODE_WRAP = 1,
106 MODE_INSERT = 2,
107 MODE_APPKEYPAD = 4,
108 MODE_ALTSCREEN = 8,
109 MODE_CRLF = 16,
110 MODE_MOUSEBTN = 32,
111 MODE_MOUSEMOTION = 64,
112 MODE_REVERSE = 128,
113 MODE_KBDLOCK = 256,
114 MODE_HIDE = 512,
115 MODE_ECHO = 1024,
116 MODE_APPCURSOR = 2048,
117 MODE_MOUSESGR = 4096,
118 MODE_8BIT = 8192,
119 MODE_BLINK = 16384,
120 MODE_FBLINK = 32768,
121 MODE_FOCUS = 65536,
122 MODE_MOUSEX10 = 131072,
123 MODE_MOUSEMANY = 262144,
124 MODE_MOUSE = MODE_MOUSEBTN|MODE_MOUSEMOTION|MODE_MOUSEX10\
125 |MODE_MOUSEMANY,
126 };
127
128 enum escape_state {
129 ESC_START = 1,
130 ESC_CSI = 2,
131 ESC_STR = 4, /* DSC, OSC, PM, APC */
132 ESC_ALTCHARSET = 8,
133 ESC_STR_END = 16, /* a final string was encountered */
134 ESC_TEST = 32, /* Enter in test mode */
135 };
136
137 enum window_state {
138 WIN_VISIBLE = 1,
139 WIN_REDRAW = 2,
140 WIN_FOCUSED = 4
141 };
142
143 enum selection_type {
144 SEL_REGULAR = 1,
145 SEL_RECTANGULAR = 2
146 };
147
148 enum selection_snap {
149 SNAP_WORD = 1,
150 SNAP_LINE = 2
151 };
152
153 typedef unsigned char uchar;
154 typedef unsigned int uint;
155 typedef unsigned long ulong;
156 typedef unsigned short ushort;
157
158 typedef struct {
159 char c[UTF_SIZ]; /* character code */
160 uchar mode; /* attribute flags */
161 ushort fg; /* foreground */
162 ushort bg; /* background */
163 } Glyph;
164
165 typedef Glyph *Line;
166
167 typedef struct {
168 Glyph attr; /* current char attributes */
169 int x;
170 int y;
171 char state;
172 } TCursor;
173
174 /* CSI Escape sequence structs */
175 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
176 typedef struct {
177 char buf[ESC_BUF_SIZ]; /* raw string */
178 int len; /* raw string length */
179 char priv;
180 int arg[ESC_ARG_SIZ];
181 int narg; /* nb of args */
182 char mode;
183 } CSIEscape;
184
185 /* STR Escape sequence structs */
186 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
187 typedef struct {
188 char type; /* ESC type ... */
189 char buf[STR_BUF_SIZ]; /* raw string */
190 int len; /* raw string length */
191 char *args[STR_ARG_SIZ];
192 int narg; /* nb of args */
193 } STREscape;
194
195 /* Internal representation of the screen */
196 typedef struct {
197 int row; /* nb row */
198 int col; /* nb col */
199 Line *line; /* screen */
200 Line *alt; /* alternate screen */
201 bool *dirty; /* dirtyness of lines */
202 TCursor c; /* cursor */
203 int top; /* top scroll limit */
204 int bot; /* bottom scroll limit */
205 int mode; /* terminal mode flags */
206 int esc; /* escape state flags */
207 bool numlock; /* lock numbers in keyboard */
208 bool *tabs;
209 } Term;
210
211 /* Purely graphic info */
212 typedef struct {
213 Display *dpy;
214 Colourmap cmap;
215 Window win;
216 Drawable buf;
217 Atom xembed, wmdeletewin;
218 XIM xim;
219 XIC xic;
220 Draw draw;
221 Visual *vis;
222 XSetWindowAttributes attrs;
223 int scr;
224 bool isfixed; /* is fixed geometry? */
225 int fx, fy, fw, fh; /* fixed geometry */
226 int tw, th; /* tty width and height */
227 int w, h; /* window width and height */
228 int ch; /* char height */
229 int cw; /* char width */
230 char state; /* focus, redraw, visible */
231 } XWindow;
232
233 typedef struct {
234 int b;
235 uint mask;
236 char s[ESC_BUF_SIZ];
237 } Mousekey;
238
239 typedef struct {
240 KeySym k;
241 uint mask;
242 char s[ESC_BUF_SIZ];
243 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
244 signed char appkey; /* application keypad */
245 signed char appcursor; /* application cursor */
246 signed char crlf; /* crlf mode */
247 } Key;
248
249 typedef struct {
250 int mode;
251 int type;
252 int snap;
253 /*
254 * Selection variables:
255 * nb – normalized coordinates of the beginning of the selection
256 * ne – normalized coordinates of the end of the selection
257 * ob – original coordinates of the beginning of the selection
258 * oe – original coordinates of the end of the selection
259 */
260 struct {
261 int x, y;
262 } nb, ne, ob, oe;
263
264 char *clip;
265 Atom xtarget;
266 bool alt;
267 struct timeval tclick1;
268 struct timeval tclick2;
269 } Selection;
270
271 typedef union {
272 int i;
273 unsigned int ui;
274 float f;
275 const void *v;
276 } Arg;
277
278 typedef struct {
279 unsigned int mod;
280 KeySym keysym;
281 void (*func)(const Arg *);
282 const Arg arg;
283 } Shortcut;
284
285 /* function definitions used in config.h */
286 static void clippaste(const Arg *);
287 static void numlock(const Arg *);
288 static void selpaste(const Arg *);
289 static void xzoom(const Arg *);
290
291 /* Config.h for applying patches and the configuration. */
292 #include "config.h"
293
294 /* Font structure */
295 typedef struct {
296 int height;
297 int width;
298 int ascent;
299 int descent;
300 short lbearing;
301 short rbearing;
302 XftFont *match;
303 FcFontSet *set;
304 FcPattern *pattern;
305 } Font;
306
307 /* Drawing Context */
308 typedef struct {
309 Colour col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
310 Font font, bfont, ifont, ibfont;
311 GC gc;
312 } DC;
313
314 static void die(const char *, ...);
315 static void draw(void);
316 static void redraw(int);
317 static void drawregion(int, int, int, int);
318 static void execsh(void);
319 static void sigchld(int);
320 static void run(void);
321
322 static void csidump(void);
323 static void csihandle(void);
324 static void csiparse(void);
325 static void csireset(void);
326 static void strdump(void);
327 static void strhandle(void);
328 static void strparse(void);
329 static void strreset(void);
330
331 static int tattrset(int);
332 static void tclearregion(int, int, int, int);
333 static void tcursor(int);
334 static void tdeletechar(int);
335 static void tdeleteline(int);
336 static void tinsertblank(int);
337 static void tinsertblankline(int);
338 static void tmoveto(int, int);
339 static void tmoveato(int x, int y);
340 static void tnew(int, int);
341 static void tnewline(int);
342 static void tputtab(bool);
343 static void tputc(char *, int);
344 static void treset(void);
345 static int tresize(int, int);
346 static void tscrollup(int, int);
347 static void tscrolldown(int, int);
348 static void tsetattr(int*, int);
349 static void tsetchar(char *, Glyph *, int, int);
350 static void tsetscroll(int, int);
351 static void tswapscreen(void);
352 static void tsetdirt(int, int);
353 static void tsetdirtattr(int);
354 static void tsetmode(bool, bool, int *, int);
355 static void tfulldirt(void);
356 static void techo(char *, int);
357
358 static inline bool match(uint, uint);
359 static void ttynew(void);
360 static void ttyread(void);
361 static void ttyresize(void);
362 static void ttywrite(const char *, size_t);
363
364 static void xdraws(char *, Glyph, int, int, int, int);
365 static void xhints(void);
366 static void xclear(int, int, int, int);
367 static void xdrawcursor(void);
368 static void xinit(void);
369 static void xloadcols(void);
370 static int xsetcolorname(int, const char *);
371 static int xloadfont(Font *, FcPattern *);
372 static void xloadfonts(char *, int);
373 static int xloadfontset(Font *);
374 static void xsettitle(char *);
375 static void xresettitle(void);
376 static void xsetpointermotion(int);
377 static void xseturgency(int);
378 static void xsetsel(char*);
379 static void xtermclear(int, int, int, int);
380 static void xunloadfont(Font *f);
381 static void xunloadfonts(void);
382 static void xresize(int, int);
383
384 static void expose(XEvent *);
385 static void visibility(XEvent *);
386 static void unmap(XEvent *);
387 static char *kmap(KeySym, uint);
388 static void kpress(XEvent *);
389 static void cmessage(XEvent *);
390 static void cresize(int, int);
391 static void resize(XEvent *);
392 static void focus(XEvent *);
393 static void brelease(XEvent *);
394 static void bpress(XEvent *);
395 static void bmotion(XEvent *);
396 static void selnotify(XEvent *);
397 static void selclear(XEvent *);
398 static void selrequest(XEvent *);
399
400 static void selinit(void);
401 static void selsort(void);
402 static inline bool selected(int, int);
403 static void selcopy(void);
404 static void selscroll(int, int);
405 static void selsnap(int, int *, int *, int);
406
407 static int utf8decode(char *, long *);
408 static int utf8encode(long *, char *);
409 static int utf8size(char *);
410 static int isfullutf8(char *, int);
411
412 static ssize_t xwrite(int, char *, size_t);
413 static void *xmalloc(size_t);
414 static void *xrealloc(void *, size_t);
415 static void *xcalloc(size_t, size_t);
416
417 static void (*handler[LASTEvent])(XEvent *) = {
418 [KeyPress] = kpress,
419 [ClientMessage] = cmessage,
420 [ConfigureNotify] = resize,
421 [VisibilityNotify] = visibility,
422 [UnmapNotify] = unmap,
423 [Expose] = expose,
424 [FocusIn] = focus,
425 [FocusOut] = focus,
426 [MotionNotify] = bmotion,
427 [ButtonPress] = bpress,
428 [ButtonRelease] = brelease,
429 [SelectionClear] = selclear,
430 [SelectionNotify] = selnotify,
431 [SelectionRequest] = selrequest,
432 };
433
434 /* Globals */
435 static DC dc;
436 static XWindow xw;
437 static Term term;
438 static CSIEscape csiescseq;
439 static STREscape strescseq;
440 static int cmdfd;
441 static pid_t pid;
442 static Selection sel;
443 static int iofd = -1;
444 static char **opt_cmd = NULL;
445 static char *opt_io = NULL;
446 static char *opt_title = NULL;
447 static char *opt_embed = NULL;
448 static char *opt_class = NULL;
449 static char *opt_font = NULL;
450 static int oldbutton = 3; /* button event on startup: 3 = release */
451
452 static char *usedfont = NULL;
453 static int usedfontsize = 0;
454
455 /* Font Ring Cache */
456 enum {
457 FRC_NORMAL,
458 FRC_ITALIC,
459 FRC_BOLD,
460 FRC_ITALICBOLD
461 };
462
463 typedef struct {
464 XftFont *font;
465 int flags;
466 } Fontcache;
467
468 /* Fontcache is an array now. A new font will be appended to the array. */
469 static Fontcache frc[16];
470 static int frclen = 0;
471
472 ssize_t
473 xwrite(int fd, char *s, size_t len) {
474 size_t aux = len;
475
476 while(len > 0) {
477 ssize_t r = write(fd, s, len);
478 if(r < 0)
479 return r;
480 len -= r;
481 s += r;
482 }
483 return aux;
484 }
485
486 void *
487 xmalloc(size_t len) {
488 void *p = malloc(len);
489
490 if(!p)
491 die("Out of memory\n");
492
493 return p;
494 }
495
496 void *
497 xrealloc(void *p, size_t len) {
498 if((p = realloc(p, len)) == NULL)
499 die("Out of memory\n");
500
501 return p;
502 }
503
504 void *
505 xcalloc(size_t nmemb, size_t size) {
506 void *p = calloc(nmemb, size);
507
508 if(!p)
509 die("Out of memory\n");
510
511 return p;
512 }
513
514 int
515 utf8decode(char *s, long *u) {
516 uchar c;
517 int i, n, rtn;
518
519 rtn = 1;
520 c = *s;
521 if(~c & 0x80) { /* 0xxxxxxx */
522 *u = c;
523 return rtn;
524 } else if((c & 0xE0) == 0xC0) { /* 110xxxxx */
525 *u = c & 0x1F;
526 n = 1;
527 } else if((c & 0xF0) == 0xE0) { /* 1110xxxx */
528 *u = c & 0x0F;
529 n = 2;
530 } else if((c & 0xF8) == 0xF0) { /* 11110xxx */
531 *u = c & 0x07;
532 n = 3;
533 } else {
534 goto invalid;
535 }
536
537 for(i = n, ++s; i > 0; --i, ++rtn, ++s) {
538 c = *s;
539 if((c & 0xC0) != 0x80) /* 10xxxxxx */
540 goto invalid;
541 *u <<= 6;
542 *u |= c & 0x3F;
543 }
544
545 if((n == 1 && *u < 0x80) ||
546 (n == 2 && *u < 0x800) ||
547 (n == 3 && *u < 0x10000) ||
548 (*u >= 0xD800 && *u <= 0xDFFF)) {
549 goto invalid;
550 }
551
552 return rtn;
553 invalid:
554 *u = 0xFFFD;
555
556 return rtn;
557 }
558
559 int
560 utf8encode(long *u, char *s) {
561 uchar *sp;
562 ulong uc;
563 int i, n;
564
565 sp = (uchar *)s;
566 uc = *u;
567 if(uc < 0x80) {
568 *sp = uc; /* 0xxxxxxx */
569 return 1;
570 } else if(*u < 0x800) {
571 *sp = (uc >> 6) | 0xC0; /* 110xxxxx */
572 n = 1;
573 } else if(uc < 0x10000) {
574 *sp = (uc >> 12) | 0xE0; /* 1110xxxx */
575 n = 2;
576 } else if(uc <= 0x10FFFF) {
577 *sp = (uc >> 18) | 0xF0; /* 11110xxx */
578 n = 3;
579 } else {
580 goto invalid;
581 }
582
583 for(i=n,++sp; i>0; --i,++sp)
584 *sp = ((uc >> 6*(i-1)) & 0x3F) | 0x80; /* 10xxxxxx */
585
586 return n+1;
587 invalid:
588 /* U+FFFD */
589 *s++ = '\xEF';
590 *s++ = '\xBF';
591 *s = '\xBD';
592
593 return 3;
594 }
595
596 /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
597 UTF-8 otherwise return 0 */
598 int
599 isfullutf8(char *s, int b) {
600 uchar *c1, *c2, *c3;
601
602 c1 = (uchar *)s;
603 c2 = (uchar *)++s;
604 c3 = (uchar *)++s;
605 if(b < 1) {
606 return 0;
607 } else if((*c1 & 0xE0) == 0xC0 && b == 1) {
608 return 0;
609 } else if((*c1 & 0xF0) == 0xE0 &&
610 ((b == 1) ||
611 ((b == 2) && (*c2 & 0xC0) == 0x80))) {
612 return 0;
613 } else if((*c1 & 0xF8) == 0xF0 &&
614 ((b == 1) ||
615 ((b == 2) && (*c2 & 0xC0) == 0x80) ||
616 ((b == 3) && (*c2 & 0xC0) == 0x80 && (*c3 & 0xC0) == 0x80))) {
617 return 0;
618 } else {
619 return 1;
620 }
621 }
622
623 int
624 utf8size(char *s) {
625 uchar c = *s;
626
627 if(~c & 0x80) {
628 return 1;
629 } else if((c & 0xE0) == 0xC0) {
630 return 2;
631 } else if((c & 0xF0) == 0xE0) {
632 return 3;
633 } else {
634 return 4;
635 }
636 }
637
638 static void
639 selinit(void) {
640 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
641 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
642 sel.mode = 0;
643 sel.ob.x = -1;
644 sel.clip = NULL;
645 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
646 if(sel.xtarget == None)
647 sel.xtarget = XA_STRING;
648 }
649
650 static int
651 x2col(int x) {
652 x -= borderpx;
653 x /= xw.cw;
654
655 return LIMIT(x, 0, term.col-1);
656 }
657
658 static int
659 y2row(int y) {
660 y -= borderpx;
661 y /= xw.ch;
662
663 return LIMIT(y, 0, term.row-1);
664 }
665
666 static void
667 selsort(void) {
668 if(sel.ob.y == sel.oe.y) {
669 sel.nb.x = MIN(sel.ob.x, sel.oe.x);
670 sel.ne.x = MAX(sel.ob.x, sel.oe.x);
671 } else {
672 sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
673 sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
674 }
675 sel.nb.y = MIN(sel.ob.y, sel.oe.y);
676 sel.ne.y = MAX(sel.ob.y, sel.oe.y);
677 }
678
679 static inline bool
680 selected(int x, int y) {
681 if(sel.ne.y == y && sel.nb.y == y)
682 return BETWEEN(x, sel.nb.x, sel.ne.x);
683
684 if(sel.type == SEL_RECTANGULAR) {
685 return ((sel.nb.y <= y && y <= sel.ne.y)
686 && (sel.nb.x <= x && x <= sel.ne.x));
687 }
688
689 return ((sel.nb.y < y && y < sel.ne.y)
690 || (y == sel.ne.y && x <= sel.ne.x))
691 || (y == sel.nb.y && x >= sel.nb.x
692 && (x <= sel.ne.x || sel.nb.y != sel.ne.y));
693 }
694
695 void
696 selsnap(int mode, int *x, int *y, int direction) {
697 int i;
698
699 switch(mode) {
700 case SNAP_WORD:
701 /*
702 * Snap around if the word wraps around at the end or
703 * beginning of a line.
704 */
705 for(;;) {
706 if(direction < 0 && *x <= 0) {
707 if(*y > 0 && term.line[*y - 1][term.col-1].mode
708 & ATTR_WRAP) {
709 *y -= 1;
710 *x = term.col-1;
711 } else {
712 break;
713 }
714 }
715 if(direction > 0 && *x >= term.col-1) {
716 if(*y < term.row-1 && term.line[*y][*x].mode
717 & ATTR_WRAP) {
718 *y += 1;
719 *x = 0;
720 } else {
721 break;
722 }
723 }
724
725 if(strchr(worddelimiters,
726 term.line[*y][*x + direction].c[0])) {
727 break;
728 }
729
730 *x += direction;
731 }
732 break;
733 case SNAP_LINE:
734 /*
735 * Snap around if the the previous line or the current one
736 * has set ATTR_WRAP at its end. Then the whole next or
737 * previous line will be selected.
738 */
739 *x = (direction < 0) ? 0 : term.col - 1;
740 if(direction < 0 && *y > 0) {
741 for(; *y > 0; *y += direction) {
742 if(!(term.line[*y-1][term.col-1].mode
743 & ATTR_WRAP)) {
744 break;
745 }
746 }
747 } else if(direction > 0 && *y < term.row-1) {
748 for(; *y < term.row; *y += direction) {
749 if(!(term.line[*y][term.col-1].mode
750 & ATTR_WRAP)) {
751 break;
752 }
753 }
754 }
755 break;
756 default:
757 /*
758 * Select the whole line when the end of line is reached.
759 */
760 if(direction > 0) {
761 i = term.col;
762 while(--i > 0 && term.line[*y][i].c[0] == ' ')
763 /* nothing */;
764 if(i > 0 && i < *x)
765 *x = term.col - 1;
766 }
767 break;
768 }
769 }
770
771 void
772 getbuttoninfo(XEvent *e) {
773 int type;
774 uint state = e->xbutton.state &~Button1Mask;
775
776 sel.alt = IS_SET(MODE_ALTSCREEN);
777
778 sel.oe.x = x2col(e->xbutton.x);
779 sel.oe.y = y2row(e->xbutton.y);
780
781 if(sel.ob.y < sel.oe.y
782 || (sel.ob.y == sel.oe.y && sel.ob.x < sel.oe.x)) {
783 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
784 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
785 } else {
786 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, -1);
787 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, +1);
788 }
789 selsort();
790
791 sel.type = SEL_REGULAR;
792 for(type = 1; type < LEN(selmasks); ++type) {
793 if(match(selmasks[type], state)) {
794 sel.type = type;
795 break;
796 }
797 }
798 }
799
800 void
801 mousereport(XEvent *e) {
802 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
803 button = e->xbutton.button, state = e->xbutton.state,
804 len;
805 char buf[40];
806 static int ox, oy;
807
808 /* from urxvt */
809 if(e->xbutton.type == MotionNotify) {
810 if(x == ox && y == oy)
811 return;
812 if(!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
813 return;
814 /* MOUSE_MOTION: no reporting if no button is pressed */
815 if(IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
816 return;
817
818 button = oldbutton + 32;
819 ox = x;
820 oy = y;
821 } else if(!IS_SET(MODE_MOUSESGR)
822 && (e->xbutton.type == ButtonRelease
823 || button == AnyButton)) {
824 button = 3;
825 } else {
826 button -= Button1;
827 if(button >= 3)
828 button += 64 - 3;
829 if(e->xbutton.type == ButtonPress) {
830 oldbutton = button;
831 ox = x;
832 oy = y;
833 }
834 }
835
836 if(!IS_SET(MODE_MOUSEX10)) {
837 button += (state & ShiftMask ? 4 : 0)
838 + (state & Mod4Mask ? 8 : 0)
839 + (state & ControlMask ? 16 : 0);
840 }
841
842 len = 0;
843 if(IS_SET(MODE_MOUSESGR)) {
844 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
845 button, x+1, y+1,
846 e->xbutton.type == ButtonRelease ? 'm' : 'M');
847 } else if(x < 223 && y < 223) {
848 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
849 IS_SET(MODE_MOUSEX10)? button-1 : 32+button,
850 32+x+1, 32+y+1);
851 } else {
852 return;
853 }
854
855 ttywrite(buf, len);
856 }
857
858 void
859 bpress(XEvent *e) {
860 struct timeval now;
861 Mousekey *mk;
862
863 if(IS_SET(MODE_MOUSE)) {
864 mousereport(e);
865 return;
866 }
867
868 for(mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
869 if(e->xbutton.button == mk->b
870 && match(mk->mask, e->xbutton.state)) {
871 ttywrite(mk->s, strlen(mk->s));
872 if(IS_SET(MODE_ECHO))
873 techo(mk->s, strlen(mk->s));
874 return;
875 }
876 }
877
878 if(e->xbutton.button == Button1) {
879 gettimeofday(&now, NULL);
880
881 /* Clear previous selection, logically and visually. */
882 selclear(NULL);
883 sel.mode = 1;
884 sel.type = SEL_REGULAR;
885 sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
886 sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
887
888 /*
889 * If the user clicks below predefined timeouts specific
890 * snapping behaviour is exposed.
891 */
892 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
893 sel.snap = SNAP_LINE;
894 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
895 sel.snap = SNAP_WORD;
896 } else {
897 sel.snap = 0;
898 }
899 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
900 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
901 selsort();
902
903 /*
904 * Draw selection, unless it's regular and we don't want to
905 * make clicks visible
906 */
907 if(sel.snap != 0) {
908 sel.mode++;
909 tsetdirt(sel.nb.y, sel.ne.y);
910 }
911 sel.tclick2 = sel.tclick1;
912 sel.tclick1 = now;
913 }
914 }
915
916 void
917 selcopy(void) {
918 char *str, *ptr;
919 int x, y, bufsize, size, i, ex;
920 Glyph *gp, *last;
921
922 if(sel.ob.x == -1) {
923 str = NULL;
924 } else {
925 bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
926 ptr = str = xmalloc(bufsize);
927
928 /* append every set & selected glyph to the selection */
929 for(y = sel.nb.y; y < sel.ne.y + 1; y++) {
930 gp = &term.line[y][0];
931 last = gp + term.col;
932
933 while(--last >= gp && !(selected(last - gp, y) && \
934 strcmp(last->c, " ") != 0))
935 /* nothing */;
936
937 for(x = 0; gp <= last; x++, ++gp) {
938 if(!selected(x, y))
939 continue;
940
941 size = utf8size(gp->c);
942 memcpy(ptr, gp->c, size);
943 ptr += size;
944 }
945
946 /*
947 * Copy and pasting of line endings is inconsistent
948 * in the inconsistent terminal and GUI world.
949 * The best solution seems like to produce '\n' when
950 * something is copied from st and convert '\n' to
951 * '\r', when something to be pasted is received by
952 * st.
953 * FIXME: Fix the computer world.
954 */
955 if(y < sel.ne.y && !((gp-1)->mode & ATTR_WRAP))
956 *ptr++ = '\n';
957
958 /*
959 * If the last selected line expands in the selection
960 * after the visible text '\n' is appended.
961 */
962 if(y == sel.ne.y) {
963 i = term.col;
964 while(--i > 0 && term.line[y][i].c[0] == ' ')
965 /* nothing */;
966 ex = sel.ne.x;
967 if(sel.nb.y == sel.ne.y && sel.ne.x < sel.nb.x)
968 ex = sel.nb.x;
969 if(i < ex)
970 *ptr++ = '\n';
971 }
972 }
973 *ptr = 0;
974 }
975 xsetsel(str);
976 }
977
978 void
979 selnotify(XEvent *e) {
980 ulong nitems, ofs, rem;
981 int format;
982 uchar *data, *last, *repl;
983 Atom type;
984
985 ofs = 0;
986 do {
987 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
988 False, AnyPropertyType, &type, &format,
989 &nitems, &rem, &data)) {
990 fprintf(stderr, "Clipboard allocation failed\n");
991 return;
992 }
993
994 /*
995 * As seen in selcopy:
996 * Line endings are inconsistent in the terminal and GUI world
997 * copy and pasting. When receiving some selection data,
998 * replace all '\n' with '\r'.
999 * FIXME: Fix the computer world.
1000 */
1001 repl = data;
1002 last = data + nitems * format / 8;
1003 while((repl = memchr(repl, '\n', last - repl))) {
1004 *repl++ = '\r';
1005 }
1006
1007 ttywrite((const char *)data, nitems * format / 8);
1008 XFree(data);
1009 /* number of 32-bit chunks returned */
1010 ofs += nitems * format / 32;
1011 } while(rem > 0);
1012 }
1013
1014 void
1015 selpaste(const Arg *dummy) {
1016 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
1017 xw.win, CurrentTime);
1018 }
1019
1020 void
1021 clippaste(const Arg *dummy) {
1022 Atom clipboard;
1023
1024 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1025 XConvertSelection(xw.dpy, clipboard, sel.xtarget, XA_PRIMARY,
1026 xw.win, CurrentTime);
1027 }
1028
1029 void
1030 selclear(XEvent *e) {
1031 if(sel.ob.x == -1)
1032 return;
1033 sel.ob.x = -1;
1034 tsetdirt(sel.nb.y, sel.ne.y);
1035 }
1036
1037 void
1038 selrequest(XEvent *e) {
1039 XSelectionRequestEvent *xsre;
1040 XSelectionEvent xev;
1041 Atom xa_targets, string;
1042
1043 xsre = (XSelectionRequestEvent *) e;
1044 xev.type = SelectionNotify;
1045 xev.requestor = xsre->requestor;
1046 xev.selection = xsre->selection;
1047 xev.target = xsre->target;
1048 xev.time = xsre->time;
1049 /* reject */
1050 xev.property = None;
1051
1052 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
1053 if(xsre->target == xa_targets) {
1054 /* respond with the supported type */
1055 string = sel.xtarget;
1056 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1057 XA_ATOM, 32, PropModeReplace,
1058 (uchar *) &string, 1);
1059 xev.property = xsre->property;
1060 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
1061 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1062 xsre->target, 8, PropModeReplace,
1063 (uchar *) sel.clip, strlen(sel.clip));
1064 xev.property = xsre->property;
1065 }
1066
1067 /* all done, send a notification to the listener */
1068 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
1069 fprintf(stderr, "Error sending SelectionNotify event\n");
1070 }
1071
1072 void
1073 xsetsel(char *str) {
1074 /* register the selection for both the clipboard and the primary */
1075 Atom clipboard;
1076
1077 free(sel.clip);
1078 sel.clip = str;
1079
1080 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
1081
1082 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1083 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
1084 }
1085
1086 void
1087 brelease(XEvent *e) {
1088 if(IS_SET(MODE_MOUSE)) {
1089 mousereport(e);
1090 return;
1091 }
1092
1093 if(e->xbutton.button == Button2) {
1094 selpaste(NULL);
1095 } else if(e->xbutton.button == Button1) {
1096 if(sel.mode < 2) {
1097 selclear(NULL);
1098 } else {
1099 getbuttoninfo(e);
1100 selcopy();
1101 }
1102 sel.mode = 0;
1103 tsetdirt(sel.nb.y, sel.ne.y);
1104 }
1105 }
1106
1107 void
1108 bmotion(XEvent *e) {
1109 int oldey, oldex, oldsby, oldsey;
1110
1111 if(IS_SET(MODE_MOUSE)) {
1112 mousereport(e);
1113 return;
1114 }
1115
1116 if(!sel.mode)
1117 return;
1118
1119 sel.mode++;
1120 oldey = sel.oe.y;
1121 oldex = sel.oe.x;
1122 oldsby = sel.nb.y;
1123 oldsey = sel.ne.y;
1124 getbuttoninfo(e);
1125
1126 if(oldey != sel.oe.y || oldex != sel.oe.x)
1127 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
1128 }
1129
1130 void
1131 die(const char *errstr, ...) {
1132 va_list ap;
1133
1134 va_start(ap, errstr);
1135 vfprintf(stderr, errstr, ap);
1136 va_end(ap);
1137 exit(EXIT_FAILURE);
1138 }
1139
1140 void
1141 execsh(void) {
1142 char **args;
1143 char *envshell = getenv("SHELL");
1144 const struct passwd *pass = getpwuid(getuid());
1145 char buf[sizeof(long) * 8 + 1];
1146
1147 unsetenv("COLUMNS");
1148 unsetenv("LINES");
1149 unsetenv("TERMCAP");
1150
1151 if(pass) {
1152 setenv("LOGNAME", pass->pw_name, 1);
1153 setenv("USER", pass->pw_name, 1);
1154 setenv("SHELL", pass->pw_shell, 0);
1155 setenv("HOME", pass->pw_dir, 0);
1156 }
1157
1158 snprintf(buf, sizeof(buf), "%lu", xw.win);
1159 setenv("WINDOWID", buf, 1);
1160
1161 signal(SIGCHLD, SIG_DFL);
1162 signal(SIGHUP, SIG_DFL);
1163 signal(SIGINT, SIG_DFL);
1164 signal(SIGQUIT, SIG_DFL);
1165 signal(SIGTERM, SIG_DFL);
1166 signal(SIGALRM, SIG_DFL);
1167
1168 DEFAULT(envshell, shell);
1169 setenv("TERM", termname, 1);
1170 args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
1171 execvp(args[0], args);
1172 exit(EXIT_FAILURE);
1173 }
1174
1175 void
1176 sigchld(int a) {
1177 int stat = 0;
1178
1179 if(waitpid(pid, &stat, 0) < 0)
1180 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
1181
1182 if(WIFEXITED(stat)) {
1183 exit(WEXITSTATUS(stat));
1184 } else {
1185 exit(EXIT_FAILURE);
1186 }
1187 }
1188
1189 void
1190 ttynew(void) {
1191 int m, s;
1192 struct winsize w = {term.row, term.col, 0, 0};
1193
1194 /* seems to work fine on linux, openbsd and freebsd */
1195 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1196 die("openpty failed: %s\n", SERRNO);
1197
1198 switch(pid = fork()) {
1199 case -1:
1200 die("fork failed\n");
1201 break;
1202 case 0:
1203 setsid(); /* create a new process group */
1204 dup2(s, STDIN_FILENO);
1205 dup2(s, STDOUT_FILENO);
1206 dup2(s, STDERR_FILENO);
1207 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1208 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
1209 close(s);
1210 close(m);
1211 execsh();
1212 break;
1213 default:
1214 close(s);
1215 cmdfd = m;
1216 signal(SIGCHLD, sigchld);
1217 if(opt_io) {
1218 iofd = (!strcmp(opt_io, "-")) ?
1219 STDOUT_FILENO :
1220 open(opt_io, O_WRONLY | O_CREAT, 0666);
1221 if(iofd < 0) {
1222 fprintf(stderr, "Error opening %s:%s\n",
1223 opt_io, strerror(errno));
1224 }
1225 }
1226 }
1227 }
1228
1229 void
1230 dump(char c) {
1231 static int col;
1232
1233 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
1234 if(++col % 10 == 0)
1235 fprintf(stderr, "\n");
1236 }
1237
1238 void
1239 ttyread(void) {
1240 static char buf[BUFSIZ];
1241 static int buflen = 0;
1242 char *ptr;
1243 char s[UTF_SIZ];
1244 int charsize; /* size of utf8 char in bytes */
1245 long utf8c;
1246 int ret;
1247
1248 /* append read bytes to unprocessed bytes */
1249 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1250 die("Couldn't read from shell: %s\n", SERRNO);
1251
1252 /* process every complete utf8 char */
1253 buflen += ret;
1254 ptr = buf;
1255 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
1256 charsize = utf8decode(ptr, &utf8c);
1257 utf8encode(&utf8c, s);
1258 tputc(s, charsize);
1259 ptr += charsize;
1260 buflen -= charsize;
1261 }
1262
1263 /* keep any uncomplete utf8 char for the next call */
1264 memmove(buf, ptr, buflen);
1265 }
1266
1267 void
1268 ttywrite(const char *s, size_t n) {
1269 if(write(cmdfd, s, n) == -1)
1270 die("write error on tty: %s\n", SERRNO);
1271 }
1272
1273 void
1274 ttyresize(void) {
1275 struct winsize w;
1276
1277 w.ws_row = term.row;
1278 w.ws_col = term.col;
1279 w.ws_xpixel = xw.tw;
1280 w.ws_ypixel = xw.th;
1281 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1282 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
1283 }
1284
1285 int
1286 tattrset(int attr) {
1287 int i, j;
1288
1289 for(i = 0; i < term.row-1; i++) {
1290 for(j = 0; j < term.col-1; j++) {
1291 if(term.line[i][j].mode & attr)
1292 return 1;
1293 }
1294 }
1295
1296 return 0;
1297 }
1298
1299 void
1300 tsetdirt(int top, int bot) {
1301 int i;
1302
1303 LIMIT(top, 0, term.row-1);
1304 LIMIT(bot, 0, term.row-1);
1305
1306 for(i = top; i <= bot; i++)
1307 term.dirty[i] = 1;
1308 }
1309
1310 void
1311 tsetdirtattr(int attr) {
1312 int i, j;
1313
1314 for(i = 0; i < term.row-1; i++) {
1315 for(j = 0; j < term.col-1; j++) {
1316 if(term.line[i][j].mode & attr) {
1317 tsetdirt(i, i);
1318 break;
1319 }
1320 }
1321 }
1322 }
1323
1324 void
1325 tfulldirt(void) {
1326 tsetdirt(0, term.row-1);
1327 }
1328
1329 void
1330 tcursor(int mode) {
1331 static TCursor c;
1332
1333 if(mode == CURSOR_SAVE) {
1334 c = term.c;
1335 } else if(mode == CURSOR_LOAD) {
1336 term.c = c;
1337 tmoveto(c.x, c.y);
1338 }
1339 }
1340
1341 void
1342 treset(void) {
1343 uint i;
1344
1345 term.c = (TCursor){{
1346 .mode = ATTR_NULL,
1347 .fg = defaultfg,
1348 .bg = defaultbg
1349 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1350
1351 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1352 for(i = tabspaces; i < term.col; i += tabspaces)
1353 term.tabs[i] = 1;
1354 term.top = 0;
1355 term.bot = term.row - 1;
1356 term.mode = MODE_WRAP;
1357
1358 tclearregion(0, 0, term.col-1, term.row-1);
1359 tmoveto(0, 0);
1360 tcursor(CURSOR_SAVE);
1361 }
1362
1363 void
1364 tnew(int col, int row) {
1365 memset(&term, 0, sizeof(Term));
1366 tresize(col, row);
1367 term.numlock = 1;
1368
1369 treset();
1370 }
1371
1372 void
1373 tswapscreen(void) {
1374 Line *tmp = term.line;
1375
1376 term.line = term.alt;
1377 term.alt = tmp;
1378 term.mode ^= MODE_ALTSCREEN;
1379 tfulldirt();
1380 }
1381
1382 void
1383 tscrolldown(int orig, int n) {
1384 int i;
1385 Line temp;
1386
1387 LIMIT(n, 0, term.bot-orig+1);
1388
1389 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1390
1391 for(i = term.bot; i >= orig+n; i--) {
1392 temp = term.line[i];
1393 term.line[i] = term.line[i-n];
1394 term.line[i-n] = temp;
1395
1396 term.dirty[i] = 1;
1397 term.dirty[i-n] = 1;
1398 }
1399
1400 selscroll(orig, n);
1401 }
1402
1403 void
1404 tscrollup(int orig, int n) {
1405 int i;
1406 Line temp;
1407 LIMIT(n, 0, term.bot-orig+1);
1408
1409 tclearregion(0, orig, term.col-1, orig+n-1);
1410
1411 for(i = orig; i <= term.bot-n; i++) {
1412 temp = term.line[i];
1413 term.line[i] = term.line[i+n];
1414 term.line[i+n] = temp;
1415
1416 term.dirty[i] = 1;
1417 term.dirty[i+n] = 1;
1418 }
1419
1420 selscroll(orig, -n);
1421 }
1422
1423 void
1424 selscroll(int orig, int n) {
1425 if(sel.ob.x == -1)
1426 return;
1427
1428 if(BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
1429 if((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
1430 selclear(NULL);
1431 return;
1432 }
1433 if(sel.type == SEL_RECTANGULAR) {
1434 if(sel.ob.y < term.top)
1435 sel.ob.y = term.top;
1436 if(sel.oe.y > term.bot)
1437 sel.oe.y = term.bot;
1438 } else {
1439 if(sel.ob.y < term.top) {
1440 sel.ob.y = term.top;
1441 sel.ob.x = 0;
1442 }
1443 if(sel.oe.y > term.bot) {
1444 sel.oe.y = term.bot;
1445 sel.oe.x = term.col;
1446 }
1447 }
1448 selsort();
1449 }
1450 }
1451
1452 void
1453 tnewline(int first_col) {
1454 int y = term.c.y;
1455
1456 if(y == term.bot) {
1457 tscrollup(term.top, 1);
1458 } else {
1459 y++;
1460 }
1461 tmoveto(first_col ? 0 : term.c.x, y);
1462 }
1463
1464 void
1465 csiparse(void) {
1466 char *p = csiescseq.buf, *np;
1467 long int v;
1468
1469 csiescseq.narg = 0;
1470 if(*p == '?') {
1471 csiescseq.priv = 1;
1472 p++;
1473 }
1474
1475 csiescseq.buf[csiescseq.len] = '\0';
1476 while(p < csiescseq.buf+csiescseq.len) {
1477 np = NULL;
1478 v = strtol(p, &np, 10);
1479 if(np == p)
1480 v = 0;
1481 if(v == LONG_MAX || v == LONG_MIN)
1482 v = -1;
1483 csiescseq.arg[csiescseq.narg++] = v;
1484 p = np;
1485 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1486 break;
1487 p++;
1488 }
1489 csiescseq.mode = *p;
1490 }
1491
1492 /* for absolute user moves, when decom is set */
1493 void
1494 tmoveato(int x, int y) {
1495 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1496 }
1497
1498 void
1499 tmoveto(int x, int y) {
1500 int miny, maxy;
1501
1502 if(term.c.state & CURSOR_ORIGIN) {
1503 miny = term.top;
1504 maxy = term.bot;
1505 } else {
1506 miny = 0;
1507 maxy = term.row - 1;
1508 }
1509 LIMIT(x, 0, term.col-1);
1510 LIMIT(y, miny, maxy);
1511 term.c.state &= ~CURSOR_WRAPNEXT;
1512 term.c.x = x;
1513 term.c.y = y;
1514 }
1515
1516 void
1517 tsetchar(char *c, Glyph *attr, int x, int y) {
1518 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1519 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1520 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1521 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1522 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1523 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1524 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1525 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1526 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1527 };
1528
1529 /*
1530 * The table is proudly stolen from rxvt.
1531 */
1532 if(attr->mode & ATTR_GFX) {
1533 if(c[0] >= 0x41 && c[0] <= 0x7e
1534 && vt100_0[c[0] - 0x41]) {
1535 c = vt100_0[c[0] - 0x41];
1536 }
1537 }
1538
1539 term.dirty[y] = 1;
1540 term.line[y][x] = *attr;
1541 memcpy(term.line[y][x].c, c, UTF_SIZ);
1542 }
1543
1544 void
1545 tclearregion(int x1, int y1, int x2, int y2) {
1546 int x, y, temp;
1547
1548 if(x1 > x2)
1549 temp = x1, x1 = x2, x2 = temp;
1550 if(y1 > y2)
1551 temp = y1, y1 = y2, y2 = temp;
1552
1553 LIMIT(x1, 0, term.col-1);
1554 LIMIT(x2, 0, term.col-1);
1555 LIMIT(y1, 0, term.row-1);
1556 LIMIT(y2, 0, term.row-1);
1557
1558 for(y = y1; y <= y2; y++) {
1559 term.dirty[y] = 1;
1560 for(x = x1; x <= x2; x++) {
1561 if(selected(x, y))
1562 selclear(NULL);
1563 term.line[y][x] = term.c.attr;
1564 memcpy(term.line[y][x].c, " ", 2);
1565 }
1566 }
1567 }
1568
1569 void
1570 tdeletechar(int n) {
1571 int src = term.c.x + n;
1572 int dst = term.c.x;
1573 int size = term.col - src;
1574
1575 term.dirty[term.c.y] = 1;
1576
1577 if(src >= term.col) {
1578 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1579 return;
1580 }
1581
1582 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1583 size * sizeof(Glyph));
1584 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1585 }
1586
1587 void
1588 tinsertblank(int n) {
1589 int src = term.c.x;
1590 int dst = src + n;
1591 int size = term.col - dst;
1592
1593 term.dirty[term.c.y] = 1;
1594
1595 if(dst >= term.col) {
1596 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1597 return;
1598 }
1599
1600 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1601 size * sizeof(Glyph));
1602 tclearregion(src, term.c.y, dst - 1, term.c.y);
1603 }
1604
1605 void
1606 tinsertblankline(int n) {
1607 if(term.c.y < term.top || term.c.y > term.bot)
1608 return;
1609
1610 tscrolldown(term.c.y, n);
1611 }
1612
1613 void
1614 tdeleteline(int n) {
1615 if(term.c.y < term.top || term.c.y > term.bot)
1616 return;
1617
1618 tscrollup(term.c.y, n);
1619 }
1620
1621 void
1622 tsetattr(int *attr, int l) {
1623 int i;
1624
1625 for(i = 0; i < l; i++) {
1626 switch(attr[i]) {
1627 case 0:
1628 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE \
1629 | ATTR_BOLD | ATTR_ITALIC \
1630 | ATTR_BLINK);
1631 term.c.attr.fg = defaultfg;
1632 term.c.attr.bg = defaultbg;
1633 break;
1634 case 1:
1635 term.c.attr.mode |= ATTR_BOLD;
1636 break;
1637 case 3:
1638 term.c.attr.mode |= ATTR_ITALIC;
1639 break;
1640 case 4:
1641 term.c.attr.mode |= ATTR_UNDERLINE;
1642 break;
1643 case 5: /* slow blink */
1644 case 6: /* rapid blink */
1645 term.c.attr.mode |= ATTR_BLINK;
1646 break;
1647 case 7:
1648 term.c.attr.mode |= ATTR_REVERSE;
1649 break;
1650 case 21:
1651 case 22:
1652 term.c.attr.mode &= ~ATTR_BOLD;
1653 break;
1654 case 23:
1655 term.c.attr.mode &= ~ATTR_ITALIC;
1656 break;
1657 case 24:
1658 term.c.attr.mode &= ~ATTR_UNDERLINE;
1659 break;
1660 case 25:
1661 case 26:
1662 term.c.attr.mode &= ~ATTR_BLINK;
1663 break;
1664 case 27:
1665 term.c.attr.mode &= ~ATTR_REVERSE;
1666 break;
1667 case 38:
1668 if(i + 2 < l && attr[i + 1] == 5) {
1669 i += 2;
1670 if(BETWEEN(attr[i], 0, 255)) {
1671 term.c.attr.fg = attr[i];
1672 } else {
1673 fprintf(stderr,
1674 "erresc: bad fgcolor %d\n",
1675 attr[i]);
1676 }
1677 } else {
1678 fprintf(stderr,
1679 "erresc(38): gfx attr %d unknown\n",
1680 attr[i]);
1681 }
1682 break;
1683 case 39:
1684 term.c.attr.fg = defaultfg;
1685 break;
1686 case 48:
1687 if(i + 2 < l && attr[i + 1] == 5) {
1688 i += 2;
1689 if(BETWEEN(attr[i], 0, 255)) {
1690 term.c.attr.bg = attr[i];
1691 } else {
1692 fprintf(stderr,
1693 "erresc: bad bgcolor %d\n",
1694 attr[i]);
1695 }
1696 } else {
1697 fprintf(stderr,
1698 "erresc(48): gfx attr %d unknown\n",
1699 attr[i]);
1700 }
1701 break;
1702 case 49:
1703 term.c.attr.bg = defaultbg;
1704 break;
1705 default:
1706 if(BETWEEN(attr[i], 30, 37)) {
1707 term.c.attr.fg = attr[i] - 30;
1708 } else if(BETWEEN(attr[i], 40, 47)) {
1709 term.c.attr.bg = attr[i] - 40;
1710 } else if(BETWEEN(attr[i], 90, 97)) {
1711 term.c.attr.fg = attr[i] - 90 + 8;
1712 } else if(BETWEEN(attr[i], 100, 107)) {
1713 term.c.attr.bg = attr[i] - 100 + 8;
1714 } else {
1715 fprintf(stderr,
1716 "erresc(default): gfx attr %d unknown\n",
1717 attr[i]), csidump();
1718 }
1719 break;
1720 }
1721 }
1722 }
1723
1724 void
1725 tsetscroll(int t, int b) {
1726 int temp;
1727
1728 LIMIT(t, 0, term.row-1);
1729 LIMIT(b, 0, term.row-1);
1730 if(t > b) {
1731 temp = t;
1732 t = b;
1733 b = temp;
1734 }
1735 term.top = t;
1736 term.bot = b;
1737 }
1738
1739 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1740
1741 void
1742 tsetmode(bool priv, bool set, int *args, int narg) {
1743 int *lim, mode;
1744 bool alt;
1745
1746 for(lim = args + narg; args < lim; ++args) {
1747 if(priv) {
1748 switch(*args) {
1749 break;
1750 case 1: /* DECCKM -- Cursor key */
1751 MODBIT(term.mode, set, MODE_APPCURSOR);
1752 break;
1753 case 5: /* DECSCNM -- Reverse video */
1754 mode = term.mode;
1755 MODBIT(term.mode, set, MODE_REVERSE);
1756 if(mode != term.mode)
1757 redraw(REDRAW_TIMEOUT);
1758 break;
1759 case 6: /* DECOM -- Origin */
1760 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1761 tmoveato(0, 0);
1762 break;
1763 case 7: /* DECAWM -- Auto wrap */
1764 MODBIT(term.mode, set, MODE_WRAP);
1765 break;
1766 case 0: /* Error (IGNORED) */
1767 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1768 case 3: /* DECCOLM -- Column (IGNORED) */
1769 case 4: /* DECSCLM -- Scroll (IGNORED) */
1770 case 8: /* DECARM -- Auto repeat (IGNORED) */
1771 case 18: /* DECPFF -- Printer feed (IGNORED) */
1772 case 19: /* DECPEX -- Printer extent (IGNORED) */
1773 case 42: /* DECNRCM -- National characters (IGNORED) */
1774 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1775 break;
1776 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1777 MODBIT(term.mode, !set, MODE_HIDE);
1778 break;
1779 case 9: /* X10 mouse compatibility mode */
1780 xsetpointermotion(0);
1781 MODBIT(term.mode, 0, MODE_MOUSE);
1782 MODBIT(term.mode, set, MODE_MOUSEX10);
1783 break;
1784 case 1000: /* 1000: report button press */
1785 xsetpointermotion(0);
1786 MODBIT(term.mode, 0, MODE_MOUSE);
1787 MODBIT(term.mode, set, MODE_MOUSEBTN);
1788 break;
1789 case 1002: /* 1002: report motion on button press */
1790 xsetpointermotion(0);
1791 MODBIT(term.mode, 0, MODE_MOUSE);
1792 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1793 break;
1794 case 1003: /* 1003: enable all mouse motions */
1795 xsetpointermotion(set);
1796 MODBIT(term.mode, 0, MODE_MOUSE);
1797 MODBIT(term.mode, set, MODE_MOUSEMANY);
1798 break;
1799 case 1004: /* 1004: send focus events to tty */
1800 MODBIT(term.mode, set, MODE_FOCUS);
1801 break;
1802 case 1006: /* 1006: extended reporting mode */
1803 MODBIT(term.mode, set, MODE_MOUSESGR);
1804 break;
1805 case 1034:
1806 MODBIT(term.mode, set, MODE_8BIT);
1807 break;
1808 case 1049: /* = 1047 and 1048 */
1809 case 47:
1810 case 1047:
1811 if (!allowaltscreen)
1812 break;
1813
1814 alt = IS_SET(MODE_ALTSCREEN);
1815 if(alt) {
1816 tclearregion(0, 0, term.col-1,
1817 term.row-1);
1818 }
1819 if(set ^ alt) /* set is always 1 or 0 */
1820 tswapscreen();
1821 if(*args != 1049)
1822 break;
1823 /* FALLTRU */
1824 case 1048:
1825 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1826 break;
1827 /* Not implemented mouse modes. See comments there. */
1828 case 1001: /* mouse highlight mode; can hang the
1829 terminal by design when implemented. */
1830 case 1005: /* UTF-8 mouse mode; will confuse
1831 applications not supporting UTF-8
1832 and luit. */
1833 case 1015: /* urxvt mangled mouse mode; incompatible
1834 and can be mistaken for other control
1835 codes. */
1836 default:
1837 fprintf(stderr,
1838 "erresc: unknown private set/reset mode %d\n",
1839 *args);
1840 break;
1841 }
1842 } else {
1843 switch(*args) {
1844 case 0: /* Error (IGNORED) */
1845 break;
1846 case 2: /* KAM -- keyboard action */
1847 MODBIT(term.mode, set, MODE_KBDLOCK);
1848 break;
1849 case 4: /* IRM -- Insertion-replacement */
1850 MODBIT(term.mode, set, MODE_INSERT);
1851 break;
1852 case 12: /* SRM -- Send/Receive */
1853 MODBIT(term.mode, !set, MODE_ECHO);
1854 break;
1855 case 20: /* LNM -- Linefeed/new line */
1856 MODBIT(term.mode, set, MODE_CRLF);
1857 break;
1858 default:
1859 fprintf(stderr,
1860 "erresc: unknown set/reset mode %d\n",
1861 *args);
1862 break;
1863 }
1864 }
1865 }
1866 }
1867
1868 void
1869 csihandle(void) {
1870 switch(csiescseq.mode) {
1871 default:
1872 unknown:
1873 fprintf(stderr, "erresc: unknown csi ");
1874 csidump();
1875 /* die(""); */
1876 break;
1877 case '@': /* ICH -- Insert <n> blank char */
1878 DEFAULT(csiescseq.arg[0], 1);
1879 tinsertblank(csiescseq.arg[0]);
1880 break;
1881 case 'A': /* CUU -- Cursor <n> Up */
1882 DEFAULT(csiescseq.arg[0], 1);
1883 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1884 break;
1885 case 'B': /* CUD -- Cursor <n> Down */
1886 case 'e': /* VPR --Cursor <n> Down */
1887 DEFAULT(csiescseq.arg[0], 1);
1888 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1889 break;
1890 case 'c': /* DA -- Device Attributes */
1891 if(csiescseq.arg[0] == 0)
1892 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1893 break;
1894 case 'C': /* CUF -- Cursor <n> Forward */
1895 case 'a': /* HPR -- Cursor <n> Forward */
1896 DEFAULT(csiescseq.arg[0], 1);
1897 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1898 break;
1899 case 'D': /* CUB -- Cursor <n> Backward */
1900 DEFAULT(csiescseq.arg[0], 1);
1901 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1902 break;
1903 case 'E': /* CNL -- Cursor <n> Down and first col */
1904 DEFAULT(csiescseq.arg[0], 1);
1905 tmoveto(0, term.c.y+csiescseq.arg[0]);
1906 break;
1907 case 'F': /* CPL -- Cursor <n> Up and first col */
1908 DEFAULT(csiescseq.arg[0], 1);
1909 tmoveto(0, term.c.y-csiescseq.arg[0]);
1910 break;
1911 case 'g': /* TBC -- Tabulation clear */
1912 switch(csiescseq.arg[0]) {
1913 case 0: /* clear current tab stop */
1914 term.tabs[term.c.x] = 0;
1915 break;
1916 case 3: /* clear all the tabs */
1917 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1918 break;
1919 default:
1920 goto unknown;
1921 }
1922 break;
1923 case 'G': /* CHA -- Move to <col> */
1924 case '`': /* HPA */
1925 DEFAULT(csiescseq.arg[0], 1);
1926 tmoveto(csiescseq.arg[0]-1, term.c.y);
1927 break;
1928 case 'H': /* CUP -- Move to <row> <col> */
1929 case 'f': /* HVP */
1930 DEFAULT(csiescseq.arg[0], 1);
1931 DEFAULT(csiescseq.arg[1], 1);
1932 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1933 break;
1934 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1935 DEFAULT(csiescseq.arg[0], 1);
1936 while(csiescseq.arg[0]--)
1937 tputtab(1);
1938 break;
1939 case 'J': /* ED -- Clear screen */
1940 selclear(NULL);
1941 switch(csiescseq.arg[0]) {
1942 case 0: /* below */
1943 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1944 if(term.c.y < term.row-1) {
1945 tclearregion(0, term.c.y+1, term.col-1,
1946 term.row-1);
1947 }
1948 break;
1949 case 1: /* above */
1950 if(term.c.y > 1)
1951 tclearregion(0, 0, term.col-1, term.c.y-1);
1952 tclearregion(0, term.c.y, term.c.x, term.c.y);
1953 break;
1954 case 2: /* all */
1955 tclearregion(0, 0, term.col-1, term.row-1);
1956 break;
1957 default:
1958 goto unknown;
1959 }
1960 break;
1961 case 'K': /* EL -- Clear line */
1962 switch(csiescseq.arg[0]) {
1963 case 0: /* right */
1964 tclearregion(term.c.x, term.c.y, term.col-1,
1965 term.c.y);
1966 break;
1967 case 1: /* left */
1968 tclearregion(0, term.c.y, term.c.x, term.c.y);
1969 break;
1970 case 2: /* all */
1971 tclearregion(0, term.c.y, term.col-1, term.c.y);
1972 break;
1973 }
1974 break;
1975 case 'S': /* SU -- Scroll <n> line up */
1976 DEFAULT(csiescseq.arg[0], 1);
1977 tscrollup(term.top, csiescseq.arg[0]);
1978 break;
1979 case 'T': /* SD -- Scroll <n> line down */
1980 DEFAULT(csiescseq.arg[0], 1);
1981 tscrolldown(term.top, csiescseq.arg[0]);
1982 break;
1983 case 'L': /* IL -- Insert <n> blank lines */
1984 DEFAULT(csiescseq.arg[0], 1);
1985 tinsertblankline(csiescseq.arg[0]);
1986 break;
1987 case 'l': /* RM -- Reset Mode */
1988 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
1989 break;
1990 case 'M': /* DL -- Delete <n> lines */
1991 DEFAULT(csiescseq.arg[0], 1);
1992 tdeleteline(csiescseq.arg[0]);
1993 break;
1994 case 'X': /* ECH -- Erase <n> char */
1995 DEFAULT(csiescseq.arg[0], 1);
1996 tclearregion(term.c.x, term.c.y,
1997 term.c.x + csiescseq.arg[0] - 1, term.c.y);
1998 break;
1999 case 'P': /* DCH -- Delete <n> char */
2000 DEFAULT(csiescseq.arg[0], 1);
2001 tdeletechar(csiescseq.arg[0]);
2002 break;
2003 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
2004 DEFAULT(csiescseq.arg[0], 1);
2005 while(csiescseq.arg[0]--)
2006 tputtab(0);
2007 break;
2008 case 'd': /* VPA -- Move to <row> */
2009 DEFAULT(csiescseq.arg[0], 1);
2010 tmoveato(term.c.x, csiescseq.arg[0]-1);
2011 break;
2012 case 'h': /* SM -- Set terminal mode */
2013 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
2014 break;
2015 case 'm': /* SGR -- Terminal attribute (color) */
2016 tsetattr(csiescseq.arg, csiescseq.narg);
2017 break;
2018 case 'r': /* DECSTBM -- Set Scrolling Region */
2019 if(csiescseq.priv) {
2020 goto unknown;
2021 } else {
2022 DEFAULT(csiescseq.arg[0], 1);
2023 DEFAULT(csiescseq.arg[1], term.row);
2024 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
2025 tmoveato(0, 0);
2026 }
2027 break;
2028 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
2029 tcursor(CURSOR_SAVE);
2030 break;
2031 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
2032 tcursor(CURSOR_LOAD);
2033 break;
2034 }
2035 }
2036
2037 void
2038 csidump(void) {
2039 int i;
2040 uint c;
2041
2042 printf("ESC[");
2043 for(i = 0; i < csiescseq.len; i++) {
2044 c = csiescseq.buf[i] & 0xff;
2045 if(isprint(c)) {
2046 putchar(c);
2047 } else if(c == '\n') {
2048 printf("(\\n)");
2049 } else if(c == '\r') {
2050 printf("(\\r)");
2051 } else if(c == 0x1b) {
2052 printf("(\\e)");
2053 } else {
2054 printf("(%02x)", c);
2055 }
2056 }
2057 putchar('\n');
2058 }
2059
2060 void
2061 csireset(void) {
2062 memset(&csiescseq, 0, sizeof(csiescseq));
2063 }
2064
2065 void
2066 strhandle(void) {
2067 char *p = NULL;
2068 int i, j, narg;
2069
2070 strparse();
2071 narg = strescseq.narg;
2072
2073 switch(strescseq.type) {
2074 case ']': /* OSC -- Operating System Command */
2075 switch(i = atoi(strescseq.args[0])) {
2076 case 0:
2077 case 1:
2078 case 2:
2079 if(narg > 1)
2080 xsettitle(strescseq.args[1]);
2081 break;
2082 case 4: /* color set */
2083 if(narg < 3)
2084 break;
2085 p = strescseq.args[2];
2086 /* fall through */
2087 case 104: /* color reset, here p = NULL */
2088 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2089 if (!xsetcolorname(j, p)) {
2090 fprintf(stderr, "erresc: invalid color %s\n", p);
2091 } else {
2092 /*
2093 * TODO if defaultbg color is changed, borders
2094 * are dirty
2095 */
2096 redraw(0);
2097 }
2098 break;
2099 default:
2100 fprintf(stderr, "erresc: unknown str ");
2101 strdump();
2102 break;
2103 }
2104 break;
2105 case 'k': /* old title set compatibility */
2106 xsettitle(strescseq.args[0]);
2107 break;
2108 case 'P': /* DSC -- Device Control String */
2109 case '_': /* APC -- Application Program Command */
2110 case '^': /* PM -- Privacy Message */
2111 default:
2112 fprintf(stderr, "erresc: unknown str ");
2113 strdump();
2114 /* die(""); */
2115 break;
2116 }
2117 }
2118
2119 void
2120 strparse(void) {
2121 char *p = strescseq.buf;
2122
2123 strescseq.narg = 0;
2124 strescseq.buf[strescseq.len] = '\0';
2125 while(p && strescseq.narg < STR_ARG_SIZ)
2126 strescseq.args[strescseq.narg++] = strsep(&p, ";");
2127 }
2128
2129 void
2130 strdump(void) {
2131 int i;
2132 uint c;
2133
2134 printf("ESC%c", strescseq.type);
2135 for(i = 0; i < strescseq.len; i++) {
2136 c = strescseq.buf[i] & 0xff;
2137 if(c == '\0') {
2138 return;
2139 } else if(isprint(c)) {
2140 putchar(c);
2141 } else if(c == '\n') {
2142 printf("(\\n)");
2143 } else if(c == '\r') {
2144 printf("(\\r)");
2145 } else if(c == 0x1b) {
2146 printf("(\\e)");
2147 } else {
2148 printf("(%02x)", c);
2149 }
2150 }
2151 printf("ESC\\\n");
2152 }
2153
2154 void
2155 strreset(void) {
2156 memset(&strescseq, 0, sizeof(strescseq));
2157 }
2158
2159 void
2160 tputtab(bool forward) {
2161 uint x = term.c.x;
2162
2163 if(forward) {
2164 if(x == term.col)
2165 return;
2166 for(++x; x < term.col && !term.tabs[x]; ++x)
2167 /* nothing */ ;
2168 } else {
2169 if(x == 0)
2170 return;
2171 for(--x; x > 0 && !term.tabs[x]; --x)
2172 /* nothing */ ;
2173 }
2174 tmoveto(x, term.c.y);
2175 }
2176
2177 void
2178 techo(char *buf, int len) {
2179 for(; len > 0; buf++, len--) {
2180 char c = *buf;
2181
2182 if(c == '\033') { /* escape */
2183 tputc("^", 1);
2184 tputc("[", 1);
2185 } else if(c < '\x20') { /* control code */
2186 if(c != '\n' && c != '\r' && c != '\t') {
2187 c |= '\x40';
2188 tputc("^", 1);
2189 }
2190 tputc(&c, 1);
2191 } else {
2192 break;
2193 }
2194 }
2195 if(len)
2196 tputc(buf, len);
2197 }
2198
2199 void
2200 tputc(char *c, int len) {
2201 uchar ascii = *c;
2202 bool control = ascii < '\x20' || ascii == 0177;
2203
2204 if(iofd != -1) {
2205 if(xwrite(iofd, c, len) < 0) {
2206 fprintf(stderr, "Error writing in %s:%s\n",
2207 opt_io, strerror(errno));
2208 close(iofd);
2209 iofd = -1;
2210 }
2211 }
2212
2213 /*
2214 * STR sequences must be checked before anything else
2215 * because it can use some control codes as part of the sequence.
2216 */
2217 if(term.esc & ESC_STR) {
2218 switch(ascii) {
2219 case '\033':
2220 term.esc = ESC_START | ESC_STR_END;
2221 break;
2222 case '\a': /* backwards compatibility to xterm */
2223 term.esc = 0;
2224 strhandle();
2225 break;
2226 default:
2227 if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2228 memmove(&strescseq.buf[strescseq.len], c, len);
2229 strescseq.len += len;
2230 } else {
2231 /*
2232 * Here is a bug in terminals. If the user never sends
2233 * some code to stop the str or esc command, then st
2234 * will stop responding. But this is better than
2235 * silently failing with unknown characters. At least
2236 * then users will report back.
2237 *
2238 * In the case users ever get fixed, here is the code:
2239 */
2240 /*
2241 * term.esc = 0;
2242 * strhandle();
2243 */
2244 }
2245 }
2246 return;
2247 }
2248
2249 /*
2250 * Actions of control codes must be performed as soon they arrive
2251 * because they can be embedded inside a control sequence, and
2252 * they must not cause conflicts with sequences.
2253 */
2254 if(control) {
2255 switch(ascii) {
2256 case '\t': /* HT */
2257 tputtab(1);
2258 return;
2259 case '\b': /* BS */
2260 tmoveto(term.c.x-1, term.c.y);
2261 return;
2262 case '\r': /* CR */
2263 tmoveto(0, term.c.y);
2264 return;
2265 case '\f': /* LF */
2266 case '\v': /* VT */
2267 case '\n': /* LF */
2268 /* go to first col if the mode is set */
2269 tnewline(IS_SET(MODE_CRLF));
2270 return;
2271 case '\a': /* BEL */
2272 if(!(xw.state & WIN_FOCUSED))
2273 xseturgency(1);
2274 return;
2275 case '\033': /* ESC */
2276 csireset();
2277 term.esc = ESC_START;
2278 return;
2279 case '\016': /* SO */
2280 case '\017': /* SI */
2281 /*
2282 * Different charsets are hard to handle. Applications
2283 * should use the right alt charset escapes for the
2284 * only reason they still exist: line drawing. The
2285 * rest is incompatible history st should not support.
2286 */
2287 return;
2288 case '\032': /* SUB */
2289 case '\030': /* CAN */
2290 csireset();
2291 return;
2292 case '\005': /* ENQ (IGNORED) */
2293 case '\000': /* NUL (IGNORED) */
2294 case '\021': /* XON (IGNORED) */
2295 case '\023': /* XOFF (IGNORED) */
2296 case 0177: /* DEL (IGNORED) */
2297 return;
2298 }
2299 } else if(term.esc & ESC_START) {
2300 if(term.esc & ESC_CSI) {
2301 csiescseq.buf[csiescseq.len++] = ascii;
2302 if(BETWEEN(ascii, 0x40, 0x7E)
2303 || csiescseq.len >= \
2304 sizeof(csiescseq.buf)-1) {
2305 term.esc = 0;
2306 csiparse();
2307 csihandle();
2308 }
2309 } else if(term.esc & ESC_STR_END) {
2310 term.esc = 0;
2311 if(ascii == '\\')
2312 strhandle();
2313 } else if(term.esc & ESC_ALTCHARSET) {
2314 switch(ascii) {
2315 case '0': /* Line drawing set */
2316 term.c.attr.mode |= ATTR_GFX;
2317 break;
2318 case 'B': /* USASCII */
2319 term.c.attr.mode &= ~ATTR_GFX;
2320 break;
2321 case 'A': /* UK (IGNORED) */
2322 case '<': /* multinational charset (IGNORED) */
2323 case '5': /* Finnish (IGNORED) */
2324 case 'C': /* Finnish (IGNORED) */
2325 case 'K': /* German (IGNORED) */
2326 break;
2327 default:
2328 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2329 }
2330 term.esc = 0;
2331 } else if(term.esc & ESC_TEST) {
2332 if(ascii == '8') { /* DEC screen alignment test. */
2333 char E[UTF_SIZ] = "E";
2334 int x, y;
2335
2336 for(x = 0; x < term.col; ++x) {
2337 for(y = 0; y < term.row; ++y)
2338 tsetchar(E, &term.c.attr, x, y);
2339 }
2340 }
2341 term.esc = 0;
2342 } else {
2343 switch(ascii) {
2344 case '[':
2345 term.esc |= ESC_CSI;
2346 break;
2347 case '#':
2348 term.esc |= ESC_TEST;
2349 break;
2350 case 'P': /* DCS -- Device Control String */
2351 case '_': /* APC -- Application Program Command */
2352 case '^': /* PM -- Privacy Message */
2353 case ']': /* OSC -- Operating System Command */
2354 case 'k': /* old title set compatibility */
2355 strreset();
2356 strescseq.type = ascii;
2357 term.esc |= ESC_STR;
2358 break;
2359 case '(': /* set primary charset G0 */
2360 term.esc |= ESC_ALTCHARSET;
2361 break;
2362 case ')': /* set secondary charset G1 (IGNORED) */
2363 case '*': /* set tertiary charset G2 (IGNORED) */
2364 case '+': /* set quaternary charset G3 (IGNORED) */
2365 term.esc = 0;
2366 break;
2367 case 'D': /* IND -- Linefeed */
2368 if(term.c.y == term.bot) {
2369 tscrollup(term.top, 1);
2370 } else {
2371 tmoveto(term.c.x, term.c.y+1);
2372 }
2373 term.esc = 0;
2374 break;
2375 case 'E': /* NEL -- Next line */
2376 tnewline(1); /* always go to first col */
2377 term.esc = 0;
2378 break;
2379 case 'H': /* HTS -- Horizontal tab stop */
2380 term.tabs[term.c.x] = 1;
2381 term.esc = 0;
2382 break;
2383 case 'M': /* RI -- Reverse index */
2384 if(term.c.y == term.top) {
2385 tscrolldown(term.top, 1);
2386 } else {
2387 tmoveto(term.c.x, term.c.y-1);
2388 }
2389 term.esc = 0;
2390 break;
2391 case 'Z': /* DECID -- Identify Terminal */
2392 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2393 term.esc = 0;
2394 break;
2395 case 'c': /* RIS -- Reset to inital state */
2396 treset();
2397 term.esc = 0;
2398 xresettitle();
2399 break;
2400 case '=': /* DECPAM -- Application keypad */
2401 term.mode |= MODE_APPKEYPAD;
2402 term.esc = 0;
2403 break;
2404 case '>': /* DECPNM -- Normal keypad */
2405 term.mode &= ~MODE_APPKEYPAD;
2406 term.esc = 0;
2407 break;
2408 case '7': /* DECSC -- Save Cursor */
2409 tcursor(CURSOR_SAVE);
2410 term.esc = 0;
2411 break;
2412 case '8': /* DECRC -- Restore Cursor */
2413 tcursor(CURSOR_LOAD);
2414 term.esc = 0;
2415 break;
2416 case '\\': /* ST -- Stop */
2417 term.esc = 0;
2418 break;
2419 default:
2420 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2421 (uchar) ascii, isprint(ascii)? ascii:'.');
2422 term.esc = 0;
2423 }
2424 }
2425 /*
2426 * All characters which form part of a sequence are not
2427 * printed
2428 */
2429 return;
2430 }
2431 /*
2432 * Display control codes only if we are in graphic mode
2433 */
2434 if(control && !(term.c.attr.mode & ATTR_GFX))
2435 return;
2436 if(sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
2437 selclear(NULL);
2438 if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2439 term.line[term.c.y][term.c.x].mode |= ATTR_WRAP;
2440 tnewline(1);
2441 }
2442
2443 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col) {
2444 memmove(&term.line[term.c.y][term.c.x+1],
2445 &term.line[term.c.y][term.c.x],
2446 (term.col - term.c.x - 1) * sizeof(Glyph));
2447 }
2448
2449 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2450 if(term.c.x+1 < term.col) {
2451 tmoveto(term.c.x+1, term.c.y);
2452 } else {
2453 term.c.state |= CURSOR_WRAPNEXT;
2454 }
2455 }
2456
2457 int
2458 tresize(int col, int row) {
2459 int i;
2460 int minrow = MIN(row, term.row);
2461 int mincol = MIN(col, term.col);
2462 int slide = term.c.y - row + 1;
2463 bool *bp;
2464 Line *orig;
2465
2466 if(col < 1 || row < 1)
2467 return 0;
2468
2469 /* free unneeded rows */
2470 i = 0;
2471 if(slide > 0) {
2472 /*
2473 * slide screen to keep cursor where we expect it -
2474 * tscrollup would work here, but we can optimize to
2475 * memmove because we're freeing the earlier lines
2476 */
2477 for(/* i = 0 */; i < slide; i++) {
2478 free(term.line[i]);
2479 free(term.alt[i]);
2480 }
2481 memmove(term.line, term.line + slide, row * sizeof(Line));
2482 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2483 }
2484 for(i += row; i < term.row; i++) {
2485 free(term.line[i]);
2486 free(term.alt[i]);
2487 }
2488
2489 /* resize to new height */
2490 term.line = xrealloc(term.line, row * sizeof(Line));
2491 term.alt = xrealloc(term.alt, row * sizeof(Line));
2492 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2493 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2494
2495 /* resize each row to new width, zero-pad if needed */
2496 for(i = 0; i < minrow; i++) {
2497 term.dirty[i] = 1;
2498 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2499 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2500 }
2501
2502 /* allocate any new rows */
2503 for(/* i == minrow */; i < row; i++) {
2504 term.dirty[i] = 1;
2505 term.line[i] = xcalloc(col, sizeof(Glyph));
2506 term.alt [i] = xcalloc(col, sizeof(Glyph));
2507 }
2508 if(col > term.col) {
2509 bp = term.tabs + term.col;
2510
2511 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2512 while(--bp > term.tabs && !*bp)
2513 /* nothing */ ;
2514 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2515 *bp = 1;
2516 }
2517 /* update terminal size */
2518 term.col = col;
2519 term.row = row;
2520 /* reset scrolling region */
2521 tsetscroll(0, row-1);
2522 /* make use of the LIMIT in tmoveto */
2523 tmoveto(term.c.x, term.c.y);
2524 /* Clearing both screens */
2525 orig = term.line;
2526 do {
2527 if(mincol < col && 0 < minrow) {
2528 tclearregion(mincol, 0, col - 1, minrow - 1);
2529 }
2530 if(0 < col && minrow < row) {
2531 tclearregion(0, minrow, col - 1, row - 1);
2532 }
2533 tswapscreen();
2534 } while(orig != term.line);
2535
2536 return (slide > 0);
2537 }
2538
2539 void
2540 xresize(int col, int row) {
2541 xw.tw = MAX(1, col * xw.cw);
2542 xw.th = MAX(1, row * xw.ch);
2543
2544 XFreePixmap(xw.dpy, xw.buf);
2545 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2546 DefaultDepth(xw.dpy, xw.scr));
2547 XftDrawChange(xw.draw, xw.buf);
2548 xclear(0, 0, xw.w, xw.h);
2549 }
2550
2551 static inline ushort
2552 sixd_to_16bit(int x) {
2553 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2554 }
2555
2556 void
2557 xloadcols(void) {
2558 int i, r, g, b;
2559 XRenderColor color = { .alpha = 0xffff };
2560
2561 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
2562 for(i = 0; i < LEN(colorname); i++) {
2563 if(!colorname[i])
2564 continue;
2565 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2566 die("Could not allocate color '%s'\n", colorname[i]);
2567 }
2568 }
2569
2570 /* load colors [16-255] ; same colors as xterm */
2571 for(i = 16, r = 0; r < 6; r++) {
2572 for(g = 0; g < 6; g++) {
2573 for(b = 0; b < 6; b++) {
2574 color.red = sixd_to_16bit(r);
2575 color.green = sixd_to_16bit(g);
2576 color.blue = sixd_to_16bit(b);
2577 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i])) {
2578 die("Could not allocate color %d\n", i);
2579 }
2580 i++;
2581 }
2582 }
2583 }
2584
2585 for(r = 0; r < 24; r++, i++) {
2586 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
2587 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color,
2588 &dc.col[i])) {
2589 die("Could not allocate color %d\n", i);
2590 }
2591 }
2592 }
2593
2594 int
2595 xsetcolorname(int x, const char *name) {
2596 XRenderColor color = { .alpha = 0xffff };
2597 Colour colour;
2598 if (x < 0 || x > LEN(colorname))
2599 return -1;
2600 if(!name) {
2601 if(16 <= x && x < 16 + 216) {
2602 int r = (x - 16) / 36, g = ((x - 16) % 36) / 6, b = (x - 16) % 6;
2603 color.red = sixd_to_16bit(r);
2604 color.green = sixd_to_16bit(g);
2605 color.blue = sixd_to_16bit(b);
2606 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2607 return 0; /* something went wrong */
2608 dc.col[x] = colour;
2609 return 1;
2610 } else if (16 + 216 <= x && x < 256) {
2611 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (x - (16 + 216));
2612 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2613 return 0; /* something went wrong */
2614 dc.col[x] = colour;
2615 return 1;
2616 } else {
2617 name = colorname[x];
2618 }
2619 }
2620 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &colour))
2621 return 0;
2622 dc.col[x] = colour;
2623 return 1;
2624 }
2625
2626 void
2627 xtermclear(int col1, int row1, int col2, int row2) {
2628 XftDrawRect(xw.draw,
2629 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2630 borderpx + col1 * xw.cw,
2631 borderpx + row1 * xw.ch,
2632 (col2-col1+1) * xw.cw,
2633 (row2-row1+1) * xw.ch);
2634 }
2635
2636 /*
2637 * Absolute coordinates.
2638 */
2639 void
2640 xclear(int x1, int y1, int x2, int y2) {
2641 XftDrawRect(xw.draw,
2642 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2643 x1, y1, x2-x1, y2-y1);
2644 }
2645
2646 void
2647 xhints(void) {
2648 XClassHint class = {opt_class ? opt_class : termname, termname};
2649 XWMHints wm = {.flags = InputHint, .input = 1};
2650 XSizeHints *sizeh = NULL;
2651
2652 sizeh = XAllocSizeHints();
2653 if(xw.isfixed == False) {
2654 sizeh->flags = PSize | PResizeInc | PBaseSize;
2655 sizeh->height = xw.h;
2656 sizeh->width = xw.w;
2657 sizeh->height_inc = xw.ch;
2658 sizeh->width_inc = xw.cw;
2659 sizeh->base_height = 2 * borderpx;
2660 sizeh->base_width = 2 * borderpx;
2661 } else {
2662 sizeh->flags = PMaxSize | PMinSize;
2663 sizeh->min_width = sizeh->max_width = xw.fw;
2664 sizeh->min_height = sizeh->max_height = xw.fh;
2665 }
2666
2667 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
2668 XFree(sizeh);
2669 }
2670
2671 int
2672 xloadfont(Font *f, FcPattern *pattern) {
2673 FcPattern *match;
2674 FcResult result;
2675
2676 match = FcFontMatch(NULL, pattern, &result);
2677 if(!match)
2678 return 1;
2679
2680 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2681 FcPatternDestroy(match);
2682 return 1;
2683 }
2684
2685 f->set = NULL;
2686 f->pattern = FcPatternDuplicate(pattern);
2687
2688 f->ascent = f->match->ascent;
2689 f->descent = f->match->descent;
2690 f->lbearing = 0;
2691 f->rbearing = f->match->max_advance_width;
2692
2693 f->height = f->ascent + f->descent;
2694 f->width = f->lbearing + f->rbearing;
2695
2696 return 0;
2697 }
2698
2699 void
2700 xloadfonts(char *fontstr, int fontsize) {
2701 FcPattern *pattern;
2702 FcResult result;
2703 double fontval;
2704
2705 if(fontstr[0] == '-') {
2706 pattern = XftXlfdParse(fontstr, False, False);
2707 } else {
2708 pattern = FcNameParse((FcChar8 *)fontstr);
2709 }
2710
2711 if(!pattern)
2712 die("st: can't open font %s\n", fontstr);
2713
2714 if(fontsize > 0) {
2715 FcPatternDel(pattern, FC_PIXEL_SIZE);
2716 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2717 usedfontsize = fontsize;
2718 } else {
2719 result = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2720 if(result == FcResultMatch) {
2721 usedfontsize = (int)fontval;
2722 } else {
2723 /*
2724 * Default font size is 12, if none given. This is to
2725 * have a known usedfontsize value.
2726 */
2727 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
2728 usedfontsize = 12;
2729 }
2730 }
2731
2732 FcConfigSubstitute(0, pattern, FcMatchPattern);
2733 FcDefaultSubstitute(pattern);
2734
2735 if(xloadfont(&dc.font, pattern))
2736 die("st: can't open font %s\n", fontstr);
2737
2738 /* Setting character width and height. */
2739 xw.cw = dc.font.width;
2740 xw.ch = dc.font.height;
2741
2742 FcPatternDel(pattern, FC_SLANT);
2743 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
2744 if(xloadfont(&dc.ifont, pattern))
2745 die("st: can't open font %s\n", fontstr);
2746
2747 FcPatternDel(pattern, FC_WEIGHT);
2748 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
2749 if(xloadfont(&dc.ibfont, pattern))
2750 die("st: can't open font %s\n", fontstr);
2751
2752 FcPatternDel(pattern, FC_SLANT);
2753 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
2754 if(xloadfont(&dc.bfont, pattern))
2755 die("st: can't open font %s\n", fontstr);
2756
2757 FcPatternDestroy(pattern);
2758 }
2759
2760 int
2761 xloadfontset(Font *f) {
2762 FcResult result;
2763
2764 if(!(f->set = FcFontSort(0, f->pattern, FcTrue, 0, &result)))
2765 return 1;
2766 return 0;
2767 }
2768
2769 void
2770 xunloadfont(Font *f) {
2771 XftFontClose(xw.dpy, f->match);
2772 FcPatternDestroy(f->pattern);
2773 if(f->set)
2774 FcFontSetDestroy(f->set);
2775 }
2776
2777 void
2778 xunloadfonts(void) {
2779 int i;
2780
2781 /* Free the loaded fonts in the font cache. */
2782 for(i = 0; i < frclen; i++) {
2783 XftFontClose(xw.dpy, frc[i].font);
2784 }
2785 frclen = 0;
2786
2787 xunloadfont(&dc.font);
2788 xunloadfont(&dc.bfont);
2789 xunloadfont(&dc.ifont);
2790 xunloadfont(&dc.ibfont);
2791 }
2792
2793 void
2794 xzoom(const Arg *arg) {
2795 xunloadfonts();
2796 xloadfonts(usedfont, usedfontsize + arg->i);
2797 cresize(0, 0);
2798 redraw(0);
2799 }
2800
2801 void
2802 xinit(void) {
2803 XGCValues gcvalues;
2804 Cursor cursor;
2805 Window parent;
2806 int sw, sh;
2807
2808 if(!(xw.dpy = XOpenDisplay(NULL)))
2809 die("Can't open display\n");
2810 xw.scr = XDefaultScreen(xw.dpy);
2811 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
2812
2813 /* font */
2814 if(!FcInit())
2815 die("Could not init fontconfig.\n");
2816
2817 usedfont = (opt_font == NULL)? font : opt_font;
2818 xloadfonts(usedfont, 0);
2819
2820 /* colors */
2821 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
2822 xloadcols();
2823
2824 /* adjust fixed window geometry */
2825 if(xw.isfixed) {
2826 sw = DisplayWidth(xw.dpy, xw.scr);
2827 sh = DisplayHeight(xw.dpy, xw.scr);
2828 if(xw.fx < 0)
2829 xw.fx = sw + xw.fx - xw.fw - 1;
2830 if(xw.fy < 0)
2831 xw.fy = sh + xw.fy - xw.fh - 1;
2832
2833 xw.h = xw.fh;
2834 xw.w = xw.fw;
2835 } else {
2836 /* window - default size */
2837 xw.h = 2 * borderpx + term.row * xw.ch;
2838 xw.w = 2 * borderpx + term.col * xw.cw;
2839 xw.fx = 0;
2840 xw.fy = 0;
2841 }
2842
2843 /* Events */
2844 xw.attrs.background_pixel = dc.col[defaultbg].pixel;
2845 xw.attrs.border_pixel = dc.col[defaultbg].pixel;
2846 xw.attrs.bit_gravity = NorthWestGravity;
2847 xw.attrs.event_mask = FocusChangeMask | KeyPressMask
2848 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
2849 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
2850 xw.attrs.colormap = xw.cmap;
2851
2852 parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
2853 XRootWindow(xw.dpy, xw.scr);
2854 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
2855 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
2856 xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
2857 | CWEventMask | CWColormap, &xw.attrs);
2858
2859 memset(&gcvalues, 0, sizeof(gcvalues));
2860 gcvalues.graphics_exposures = False;
2861 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
2862 &gcvalues);
2863 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2864 DefaultDepth(xw.dpy, xw.scr));
2865 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
2866 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
2867
2868 /* Xft rendering context */
2869 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
2870
2871 /* input methods */
2872 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2873 XSetLocaleModifiers("@im=local");
2874 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2875 XSetLocaleModifiers("@im=");
2876 if((xw.xim = XOpenIM(xw.dpy,
2877 NULL, NULL, NULL)) == NULL) {
2878 die("XOpenIM failed. Could not open input"
2879 " device.\n");
2880 }
2881 }
2882 }
2883 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
2884 | XIMStatusNothing, XNClientWindow, xw.win,
2885 XNFocusWindow, xw.win, NULL);
2886 if(xw.xic == NULL)
2887 die("XCreateIC failed. Could not obtain input method.\n");
2888
2889 /* white cursor, black outline */
2890 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
2891 XDefineCursor(xw.dpy, xw.win, cursor);
2892 XRecolorCursor(xw.dpy, cursor,
2893 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
2894 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
2895
2896 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
2897 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
2898 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
2899
2900 xresettitle();
2901 XMapWindow(xw.dpy, xw.win);
2902 xhints();
2903 XSync(xw.dpy, 0);
2904 }
2905
2906 void
2907 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
2908 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
2909 width = charlen * xw.cw, xp, i;
2910 int frcflags;
2911 int u8fl, u8fblen, u8cblen, doesexist;
2912 char *u8c, *u8fs;
2913 long u8char;
2914 Font *font = &dc.font;
2915 FcResult fcres;
2916 FcPattern *fcpattern, *fontpattern;
2917 FcFontSet *fcsets[] = { NULL };
2918 FcCharSet *fccharset;
2919 Colour *fg, *bg, *temp, revfg, revbg;
2920 XRenderColor colfg, colbg;
2921 Rectangle r;
2922
2923 frcflags = FRC_NORMAL;
2924
2925 if(base.mode & ATTR_ITALIC) {
2926 if(base.fg == defaultfg)
2927 base.fg = defaultitalic;
2928 font = &dc.ifont;
2929 frcflags = FRC_ITALIC;
2930 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
2931 if(base.fg == defaultfg)
2932 base.fg = defaultitalic;
2933 font = &dc.ibfont;
2934 frcflags = FRC_ITALICBOLD;
2935 } else if(base.mode & ATTR_UNDERLINE) {
2936 if(base.fg == defaultfg)
2937 base.fg = defaultunderline;
2938 }
2939 fg = &dc.col[base.fg];
2940 bg = &dc.col[base.bg];
2941
2942 if(base.mode & ATTR_BOLD) {
2943 if(BETWEEN(base.fg, 0, 7)) {
2944 /* basic system colors */
2945 fg = &dc.col[base.fg + 8];
2946 } else if(BETWEEN(base.fg, 16, 195)) {
2947 /* 256 colors */
2948 fg = &dc.col[base.fg + 36];
2949 } else if(BETWEEN(base.fg, 232, 251)) {
2950 /* greyscale */
2951 fg = &dc.col[base.fg + 4];
2952 }
2953 /*
2954 * Those ranges will not be brightened:
2955 * 8 - 15 – bright system colors
2956 * 196 - 231 – highest 256 color cube
2957 * 252 - 255 – brightest colors in greyscale
2958 */
2959 font = &dc.bfont;
2960 frcflags = FRC_BOLD;
2961 }
2962
2963 if(IS_SET(MODE_REVERSE)) {
2964 if(fg == &dc.col[defaultfg]) {
2965 fg = &dc.col[defaultbg];
2966 } else {
2967 colfg.red = ~fg->color.red;
2968 colfg.green = ~fg->color.green;
2969 colfg.blue = ~fg->color.blue;
2970 colfg.alpha = fg->color.alpha;
2971 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
2972 fg = &revfg;
2973 }
2974
2975 if(bg == &dc.col[defaultbg]) {
2976 bg = &dc.col[defaultfg];
2977 } else {
2978 colbg.red = ~bg->color.red;
2979 colbg.green = ~bg->color.green;
2980 colbg.blue = ~bg->color.blue;
2981 colbg.alpha = bg->color.alpha;
2982 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &revbg);
2983 bg = &revbg;
2984 }
2985 }
2986
2987 if(base.mode & ATTR_REVERSE) {
2988 temp = fg;
2989 fg = bg;
2990 bg = temp;
2991 }
2992
2993 if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
2994 fg = bg;
2995
2996 /* Intelligent cleaning up of the borders. */
2997 if(x == 0) {
2998 xclear(0, (y == 0)? 0 : winy, borderpx,
2999 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
3000 }
3001 if(x + charlen >= term.col) {
3002 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
3003 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
3004 }
3005 if(y == 0)
3006 xclear(winx, 0, winx + width, borderpx);
3007 if(y == term.row-1)
3008 xclear(winx, winy + xw.ch, winx + width, xw.h);
3009
3010 /* Clean up the region we want to draw to. */
3011 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
3012
3013 /* Set the clip region because Xft is sometimes dirty. */
3014 r.x = 0;
3015 r.y = 0;
3016 r.height = xw.ch;
3017 r.width = width;
3018 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
3019
3020 for(xp = winx; bytelen > 0;) {
3021 /*
3022 * Search for the range in the to be printed string of glyphs
3023 * that are in the main font. Then print that range. If
3024 * some glyph is found that is not in the font, do the
3025 * fallback dance.
3026 */
3027 u8fs = s;
3028 u8fblen = 0;
3029 u8fl = 0;
3030 for(;;) {
3031 u8c = s;
3032 u8cblen = utf8decode(s, &u8char);
3033 s += u8cblen;
3034 bytelen -= u8cblen;
3035
3036 doesexist = XftCharExists(xw.dpy, font->match, u8char);
3037 if(!doesexist || bytelen <= 0) {
3038 if(bytelen <= 0) {
3039 if(doesexist) {
3040 u8fl++;
3041 u8fblen += u8cblen;
3042 }
3043 }
3044
3045 if(u8fl > 0) {
3046 XftDrawStringUtf8(xw.draw, fg,
3047 font->match, xp,
3048 winy + font->ascent,
3049 (FcChar8 *)u8fs,
3050 u8fblen);
3051 xp += font->width * u8fl;
3052
3053 }
3054 break;
3055 }
3056
3057 u8fl++;
3058 u8fblen += u8cblen;
3059 }
3060 if(doesexist)
3061 break;
3062
3063 /* Search the font cache. */
3064 for(i = 0; i < frclen; i++) {
3065 if(XftCharExists(xw.dpy, frc[i].font, u8char)
3066 && frc[i].flags == frcflags) {
3067 break;
3068 }
3069 }
3070
3071 /* Nothing was found. */
3072 if(i >= frclen) {
3073 if(!font->set)
3074 xloadfontset(font);
3075 fcsets[0] = font->set;
3076
3077 /*
3078 * Nothing was found in the cache. Now use
3079 * some dozen of Fontconfig calls to get the
3080 * font for one single character.
3081 */
3082 fcpattern = FcPatternDuplicate(font->pattern);
3083 fccharset = FcCharSetCreate();
3084
3085 FcCharSetAddChar(fccharset, u8char);
3086 FcPatternAddCharSet(fcpattern, FC_CHARSET,
3087 fccharset);
3088 FcPatternAddBool(fcpattern, FC_SCALABLE,
3089 FcTrue);
3090
3091 FcConfigSubstitute(0, fcpattern,
3092 FcMatchPattern);
3093 FcDefaultSubstitute(fcpattern);
3094
3095 fontpattern = FcFontSetMatch(0, fcsets,
3096 FcTrue, fcpattern, &fcres);
3097
3098 /*
3099 * Overwrite or create the new cache entry.
3100 */
3101 if(frclen >= LEN(frc)) {
3102 frclen = LEN(frc) - 1;
3103 XftFontClose(xw.dpy, frc[frclen].font);
3104 }
3105
3106 frc[frclen].font = XftFontOpenPattern(xw.dpy,
3107 fontpattern);
3108 frc[frclen].flags = frcflags;
3109
3110 i = frclen;
3111 frclen++;
3112
3113 FcPatternDestroy(fcpattern);
3114 FcCharSetDestroy(fccharset);
3115 }
3116
3117 XftDrawStringUtf8(xw.draw, fg, frc[i].font,
3118 xp, winy + frc[i].font->ascent,
3119 (FcChar8 *)u8c, u8cblen);
3120
3121 xp += font->width;
3122 }
3123
3124 /*
3125 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
3126 winy + font->ascent, (FcChar8 *)s, bytelen);
3127 */
3128
3129 if(base.mode & ATTR_UNDERLINE) {
3130 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
3131 width, 1);
3132 }
3133
3134 /* Reset clip to none. */
3135 XftDrawSetClip(xw.draw, 0);
3136 }
3137
3138 void
3139 xdrawcursor(void) {
3140 static int oldx = 0, oldy = 0;
3141 int sl;
3142 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
3143
3144 LIMIT(oldx, 0, term.col-1);
3145 LIMIT(oldy, 0, term.row-1);
3146
3147 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
3148
3149 /* remove the old cursor */
3150 sl = utf8size(term.line[oldy][oldx].c);
3151 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
3152 oldy, 1, sl);
3153
3154 /* draw the new one */
3155 if(!(IS_SET(MODE_HIDE))) {
3156 if(xw.state & WIN_FOCUSED) {
3157 if(IS_SET(MODE_REVERSE)) {
3158 g.mode |= ATTR_REVERSE;
3159 g.fg = defaultcs;
3160 g.bg = defaultfg;
3161 }
3162
3163 sl = utf8size(g.c);
3164 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
3165 } else {
3166 XftDrawRect(xw.draw, &dc.col[defaultcs],
3167 borderpx + term.c.x * xw.cw,
3168 borderpx + term.c.y * xw.ch,
3169 xw.cw - 1, 1);
3170 XftDrawRect(xw.draw, &dc.col[defaultcs],
3171 borderpx + term.c.x * xw.cw,
3172 borderpx + term.c.y * xw.ch,
3173 1, xw.ch - 1);
3174 XftDrawRect(xw.draw, &dc.col[defaultcs],
3175 borderpx + (term.c.x + 1) * xw.cw - 1,
3176 borderpx + term.c.y * xw.ch,
3177 1, xw.ch - 1);
3178 XftDrawRect(xw.draw, &dc.col[defaultcs],
3179 borderpx + term.c.x * xw.cw,
3180 borderpx + (term.c.y + 1) * xw.ch - 1,
3181 xw.cw, 1);
3182 }
3183 oldx = term.c.x, oldy = term.c.y;
3184 }
3185 }
3186
3187
3188 void
3189 xsettitle(char *p) {
3190 XTextProperty prop;
3191
3192 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3193 &prop);
3194 XSetWMName(xw.dpy, xw.win, &prop);
3195 }
3196
3197 void
3198 xresettitle(void) {
3199 xsettitle(opt_title ? opt_title : "st");
3200 }
3201
3202 void
3203 redraw(int timeout) {
3204 struct timespec tv = {0, timeout * 1000};
3205
3206 tfulldirt();
3207 draw();
3208
3209 if(timeout > 0) {
3210 nanosleep(&tv, NULL);
3211 XSync(xw.dpy, False); /* necessary for a good tput flash */
3212 }
3213 }
3214
3215 void
3216 draw(void) {
3217 drawregion(0, 0, term.col, term.row);
3218 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3219 xw.h, 0, 0);
3220 XSetForeground(xw.dpy, dc.gc,
3221 dc.col[IS_SET(MODE_REVERSE)?
3222 defaultfg : defaultbg].pixel);
3223 }
3224
3225 void
3226 drawregion(int x1, int y1, int x2, int y2) {
3227 int ic, ib, x, y, ox, sl;
3228 Glyph base, new;
3229 char buf[DRAW_BUF_SIZ];
3230 bool ena_sel = sel.ob.x != -1;
3231
3232 if(sel.alt ^ IS_SET(MODE_ALTSCREEN))
3233 ena_sel = 0;
3234
3235 if(!(xw.state & WIN_VISIBLE))
3236 return;
3237
3238 for(y = y1; y < y2; y++) {
3239 if(!term.dirty[y])
3240 continue;
3241
3242 xtermclear(0, y, term.col, y);
3243 term.dirty[y] = 0;
3244 base = term.line[y][0];
3245 ic = ib = ox = 0;
3246 for(x = x1; x < x2; x++) {
3247 new = term.line[y][x];
3248 if(ena_sel && selected(x, y))
3249 new.mode ^= ATTR_REVERSE;
3250 if(ib > 0 && (ATTRCMP(base, new)
3251 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3252 xdraws(buf, base, ox, y, ic, ib);
3253 ic = ib = 0;
3254 }
3255 if(ib == 0) {
3256 ox = x;
3257 base = new;
3258 }
3259
3260 sl = utf8size(new.c);
3261 memcpy(buf+ib, new.c, sl);
3262 ib += sl;
3263 ++ic;
3264 }
3265 if(ib > 0)
3266 xdraws(buf, base, ox, y, ic, ib);
3267 }
3268 xdrawcursor();
3269 }
3270
3271 void
3272 expose(XEvent *ev) {
3273 XExposeEvent *e = &ev->xexpose;
3274
3275 if(xw.state & WIN_REDRAW) {
3276 if(!e->count)
3277 xw.state &= ~WIN_REDRAW;
3278 }
3279 redraw(0);
3280 }
3281
3282 void
3283 visibility(XEvent *ev) {
3284 XVisibilityEvent *e = &ev->xvisibility;
3285
3286 if(e->state == VisibilityFullyObscured) {
3287 xw.state &= ~WIN_VISIBLE;
3288 } else if(!(xw.state & WIN_VISIBLE)) {
3289 /* need a full redraw for next Expose, not just a buf copy */
3290 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3291 }
3292 }
3293
3294 void
3295 unmap(XEvent *ev) {
3296 xw.state &= ~WIN_VISIBLE;
3297 }
3298
3299 void
3300 xsetpointermotion(int set) {
3301 MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
3302 XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
3303 }
3304
3305 void
3306 xseturgency(int add) {
3307 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3308
3309 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
3310 XSetWMHints(xw.dpy, xw.win, h);
3311 XFree(h);
3312 }
3313
3314 void
3315 focus(XEvent *ev) {
3316 XFocusChangeEvent *e = &ev->xfocus;
3317
3318 if(e->mode == NotifyGrab)
3319 return;
3320
3321 if(ev->type == FocusIn) {
3322 XSetICFocus(xw.xic);
3323 xw.state |= WIN_FOCUSED;
3324 xseturgency(0);
3325 if(IS_SET(MODE_FOCUS))
3326 ttywrite("\033[I", 3);
3327 } else {
3328 XUnsetICFocus(xw.xic);
3329 xw.state &= ~WIN_FOCUSED;
3330 if(IS_SET(MODE_FOCUS))
3331 ttywrite("\033[O", 3);
3332 }
3333 }
3334
3335 static inline bool
3336 match(uint mask, uint state) {
3337 state &= ~ignoremod;
3338
3339 if(mask == XK_NO_MOD && state)
3340 return false;
3341 if(mask != XK_ANY_MOD && mask != XK_NO_MOD && !state)
3342 return false;
3343 if(mask == XK_ANY_MOD)
3344 return true;
3345 return state == mask;
3346 }
3347
3348 void
3349 numlock(const Arg *dummy) {
3350 term.numlock ^= 1;
3351 }
3352
3353 char*
3354 kmap(KeySym k, uint state) {
3355 Key *kp;
3356 int i;
3357
3358 /* Check for mapped keys out of X11 function keys. */
3359 for(i = 0; i < LEN(mappedkeys); i++) {
3360 if(mappedkeys[i] == k)
3361 break;
3362 }
3363 if(i == LEN(mappedkeys)) {
3364 if((k & 0xFFFF) < 0xFD00)
3365 return NULL;
3366 }
3367
3368 for(kp = key; kp < key + LEN(key); kp++) {
3369 if(kp->k != k)
3370 continue;
3371
3372 if(!match(kp->mask, state))
3373 continue;
3374
3375 if(kp->appkey > 0) {
3376 if(!IS_SET(MODE_APPKEYPAD))
3377 continue;
3378 if(term.numlock && kp->appkey == 2)
3379 continue;
3380 } else if(kp->appkey < 0 && IS_SET(MODE_APPKEYPAD)) {
3381 continue;
3382 }
3383
3384 if((kp->appcursor < 0 && IS_SET(MODE_APPCURSOR)) ||
3385 (kp->appcursor > 0
3386 && !IS_SET(MODE_APPCURSOR))) {
3387 continue;
3388 }
3389
3390 if((kp->crlf < 0 && IS_SET(MODE_CRLF)) ||
3391 (kp->crlf > 0 && !IS_SET(MODE_CRLF))) {
3392 continue;
3393 }
3394
3395 return kp->s;
3396 }
3397
3398 return NULL;
3399 }
3400
3401 void
3402 kpress(XEvent *ev) {
3403 XKeyEvent *e = &ev->xkey;
3404 KeySym ksym;
3405 char xstr[31], buf[32], *customkey, *cp = buf;
3406 int len, ret;
3407 long c;
3408 Status status;
3409 Shortcut *bp;
3410
3411 if(IS_SET(MODE_KBDLOCK))
3412 return;
3413
3414 len = XmbLookupString(xw.xic, e, xstr, sizeof(xstr), &ksym, &status);
3415 e->state &= ~Mod2Mask;
3416 /* 1. shortcuts */
3417 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3418 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3419 bp->func(&(bp->arg));
3420 return;
3421 }
3422 }
3423
3424 /* 2. custom keys from config.h */
3425 if((customkey = kmap(ksym, e->state))) {
3426 len = strlen(customkey);
3427 memcpy(buf, customkey, len);
3428 /* 3. hardcoded (overrides X lookup) */
3429 } else {
3430 if(len == 0)
3431 return;
3432
3433 if(len == 1 && e->state & Mod1Mask) {
3434 if(IS_SET(MODE_8BIT)) {
3435 if(*xstr < 0177) {
3436 c = *xstr | 0x80;
3437 ret = utf8encode(&c, cp);
3438 cp += ret;
3439 len = 0;
3440 }
3441 } else {
3442 *cp++ = '\033';
3443 }
3444 }
3445
3446 memcpy(cp, xstr, len);
3447 len = cp - buf + len;
3448 }
3449
3450 ttywrite(buf, len);
3451 if(IS_SET(MODE_ECHO))
3452 techo(buf, len);
3453 }
3454
3455
3456 void
3457 cmessage(XEvent *e) {
3458 /*
3459 * See xembed specs
3460 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3461 */
3462 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3463 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3464 xw.state |= WIN_FOCUSED;
3465 xseturgency(0);
3466 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3467 xw.state &= ~WIN_FOCUSED;
3468 }
3469 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3470 /* Send SIGHUP to shell */
3471 kill(pid, SIGHUP);
3472 exit(EXIT_SUCCESS);
3473 }
3474 }
3475
3476 void
3477 cresize(int width, int height) {
3478 int col, row;
3479
3480 if(width != 0)
3481 xw.w = width;
3482 if(height != 0)
3483 xw.h = height;
3484
3485 col = (xw.w - 2 * borderpx) / xw.cw;
3486 row = (xw.h - 2 * borderpx) / xw.ch;
3487
3488 tresize(col, row);
3489 xresize(col, row);
3490 ttyresize();
3491 }
3492
3493 void
3494 resize(XEvent *e) {
3495 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3496 return;
3497
3498 cresize(e->xconfigure.width, e->xconfigure.height);
3499 }
3500
3501 void
3502 run(void) {
3503 XEvent ev;
3504 int w = xw.w, h = xw.h;
3505 fd_set rfd;
3506 int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3507 struct timeval drawtimeout, *tv = NULL, now, last, lastblink;
3508
3509 /* Waiting for window mapping */
3510 while(1) {
3511 XNextEvent(xw.dpy, &ev);
3512 if(ev.type == ConfigureNotify) {
3513 w = ev.xconfigure.width;
3514 h = ev.xconfigure.height;
3515 } else if(ev.type == MapNotify) {
3516 break;
3517 }
3518 }
3519
3520 if(!xw.isfixed)
3521 cresize(w, h);
3522 else
3523 cresize(xw.fw, xw.fh);
3524 ttynew();
3525
3526 gettimeofday(&lastblink, NULL);
3527 gettimeofday(&last, NULL);
3528
3529 for(xev = actionfps;;) {
3530 FD_ZERO(&rfd);
3531 FD_SET(cmdfd, &rfd);
3532 FD_SET(xfd, &rfd);
3533
3534 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
3535 if(errno == EINTR)
3536 continue;
3537 die("select failed: %s\n", SERRNO);
3538 }
3539 if(FD_ISSET(cmdfd, &rfd)) {
3540 ttyread();
3541 if(blinktimeout) {
3542 blinkset = tattrset(ATTR_BLINK);
3543 if(!blinkset && term.mode & ATTR_BLINK)
3544 term.mode &= ~(MODE_BLINK);
3545 }
3546 }
3547
3548 if(FD_ISSET(xfd, &rfd))
3549 xev = actionfps;
3550
3551 gettimeofday(&now, NULL);
3552 drawtimeout.tv_sec = 0;
3553 drawtimeout.tv_usec = (1000/xfps) * 1000;
3554 tv = &drawtimeout;
3555
3556 dodraw = 0;
3557 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
3558 tsetdirtattr(ATTR_BLINK);
3559 term.mode ^= MODE_BLINK;
3560 gettimeofday(&lastblink, NULL);
3561 dodraw = 1;
3562 }
3563 if(TIMEDIFF(now, last) \
3564 > (xev? (1000/xfps) : (1000/actionfps))) {
3565 dodraw = 1;
3566 last = now;
3567 }
3568
3569 if(dodraw) {
3570 while(XPending(xw.dpy)) {
3571 XNextEvent(xw.dpy, &ev);
3572 if(XFilterEvent(&ev, None))
3573 continue;
3574 if(handler[ev.type])
3575 (handler[ev.type])(&ev);
3576 }
3577
3578 draw();
3579 XFlush(xw.dpy);
3580
3581 if(xev && !FD_ISSET(xfd, &rfd))
3582 xev--;
3583 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
3584 if(blinkset) {
3585 if(TIMEDIFF(now, lastblink) \
3586 > blinktimeout) {
3587 drawtimeout.tv_usec = 1;
3588 } else {
3589 drawtimeout.tv_usec = (1000 * \
3590 (blinktimeout - \
3591 TIMEDIFF(now,
3592 lastblink)));
3593 }
3594 } else {
3595 tv = NULL;
3596 }
3597 }
3598 }
3599 }
3600 }
3601
3602 void
3603 usage(void) {
3604 die("%s " VERSION " (c) 2010-2013 st engineers\n" \
3605 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]" \
3606 " [-t title] [-w windowid] [-e command ...]\n", argv0);
3607 }
3608
3609 int
3610 main(int argc, char *argv[]) {
3611 int bitm, xr, yr;
3612 uint wr, hr;
3613 char *titles;
3614
3615 xw.fw = xw.fh = xw.fx = xw.fy = 0;
3616 xw.isfixed = False;
3617
3618 ARGBEGIN {
3619 case 'a':
3620 allowaltscreen = false;
3621 break;
3622 case 'c':
3623 opt_class = EARGF(usage());
3624 break;
3625 case 'e':
3626 /* eat all remaining arguments */
3627 if(argc > 1) {
3628 opt_cmd = &argv[1];
3629 if(argv[1] != NULL && opt_title == NULL) {
3630 titles = strdup(argv[1]);
3631 opt_title = basename(titles);
3632 }
3633 }
3634 goto run;
3635 case 'f':
3636 opt_font = EARGF(usage());
3637 break;
3638 case 'g':
3639 bitm = XParseGeometry(EARGF(usage()), &xr, &yr, &wr, &hr);
3640 if(bitm & XValue)
3641 xw.fx = xr;
3642 if(bitm & YValue)
3643 xw.fy = yr;
3644 if(bitm & WidthValue)
3645 xw.fw = (int)wr;
3646 if(bitm & HeightValue)
3647 xw.fh = (int)hr;
3648 if(bitm & XNegative && xw.fx == 0)
3649 xw.fx = -1;
3650 if(bitm & XNegative && xw.fy == 0)
3651 xw.fy = -1;
3652
3653 if(xw.fh != 0 && xw.fw != 0)
3654 xw.isfixed = True;
3655 break;
3656 case 'o':
3657 opt_io = EARGF(usage());
3658 break;
3659 case 't':
3660 opt_title = EARGF(usage());
3661 break;
3662 case 'w':
3663 opt_embed = EARGF(usage());
3664 break;
3665 case 'v':
3666 default:
3667 usage();
3668 } ARGEND;
3669
3670 run:
3671 setlocale(LC_CTYPE, "");
3672 XSetLocaleModifiers("");
3673 tnew(80, 24);
3674 xinit();
3675 selinit();
3676 run();
3677
3678 return 0;
3679 }
3680