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Fixing title setting with the title argument.
[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 /* bit macro */
154 #undef B0
155 enum { B0=1, B1=2, B2=4, B3=8, B4=16, B5=32, B6=64, B7=128 };
156
157 typedef unsigned char uchar;
158 typedef unsigned int uint;
159 typedef unsigned long ulong;
160 typedef unsigned short ushort;
161
162 typedef struct {
163 char c[UTF_SIZ]; /* character code */
164 uchar mode; /* attribute flags */
165 ushort fg; /* foreground */
166 ushort bg; /* background */
167 } Glyph;
168
169 typedef Glyph *Line;
170
171 typedef struct {
172 Glyph attr; /* current char attributes */
173 int x;
174 int y;
175 char state;
176 } TCursor;
177
178 /* CSI Escape sequence structs */
179 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
180 typedef struct {
181 char buf[ESC_BUF_SIZ]; /* raw string */
182 int len; /* raw string length */
183 char priv;
184 int arg[ESC_ARG_SIZ];
185 int narg; /* nb of args */
186 char mode;
187 } CSIEscape;
188
189 /* STR Escape sequence structs */
190 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
191 typedef struct {
192 char type; /* ESC type ... */
193 char buf[STR_BUF_SIZ]; /* raw string */
194 int len; /* raw string length */
195 char *args[STR_ARG_SIZ];
196 int narg; /* nb of args */
197 } STREscape;
198
199 /* Internal representation of the screen */
200 typedef struct {
201 int row; /* nb row */
202 int col; /* nb col */
203 Line *line; /* screen */
204 Line *alt; /* alternate screen */
205 bool *dirty; /* dirtyness of lines */
206 TCursor c; /* cursor */
207 int top; /* top scroll limit */
208 int bot; /* bottom scroll limit */
209 int mode; /* terminal mode flags */
210 int esc; /* escape state flags */
211 bool numlock; /* lock numbers in keyboard */
212 bool *tabs;
213 } Term;
214
215 /* Purely graphic info */
216 typedef struct {
217 Display *dpy;
218 Colourmap cmap;
219 Window win;
220 Drawable buf;
221 Atom xembed, wmdeletewin;
222 XIM xim;
223 XIC xic;
224 Draw draw;
225 Visual *vis;
226 XSetWindowAttributes attrs;
227 int scr;
228 bool isfixed; /* is fixed geometry? */
229 int fx, fy, fw, fh; /* fixed geometry */
230 int tw, th; /* tty width and height */
231 int w, h; /* window width and height */
232 int ch; /* char height */
233 int cw; /* char width */
234 char state; /* focus, redraw, visible */
235 } XWindow;
236
237 typedef struct {
238 int b;
239 uint mask;
240 char s[ESC_BUF_SIZ];
241 } Mousekey;
242
243 typedef struct {
244 KeySym k;
245 uint mask;
246 char s[ESC_BUF_SIZ];
247 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
248 signed char appkey; /* application keypad */
249 signed char appcursor; /* application cursor */
250 signed char crlf; /* crlf mode */
251 } Key;
252
253 typedef struct {
254 int mode;
255 int type;
256 int snap;
257 /*
258 * Selection variables:
259 * nb – normalized coordinates of the beginning of the selection
260 * ne – normalized coordinates of the end of the selection
261 * ob – original coordinates of the beginning of the selection
262 * oe – original coordinates of the end of the selection
263 */
264 struct {
265 int x, y;
266 } nb, ne, ob, oe;
267
268 char *clip;
269 Atom xtarget;
270 bool alt;
271 struct timeval tclick1;
272 struct timeval tclick2;
273 } Selection;
274
275 typedef union {
276 int i;
277 unsigned int ui;
278 float f;
279 const void *v;
280 } Arg;
281
282 typedef struct {
283 unsigned int mod;
284 KeySym keysym;
285 void (*func)(const Arg *);
286 const Arg arg;
287 } Shortcut;
288
289 /* function definitions used in config.h */
290 static void clippaste(const Arg *);
291 static void numlock(const Arg *);
292 static void selpaste(const Arg *);
293 static void xzoom(const Arg *);
294
295 /* Config.h for applying patches and the configuration. */
296 #include "config.h"
297
298 /* Font structure */
299 typedef struct {
300 int height;
301 int width;
302 int ascent;
303 int descent;
304 short lbearing;
305 short rbearing;
306 XftFont *match;
307 FcFontSet *set;
308 FcPattern *pattern;
309 } Font;
310
311 /* Drawing Context */
312 typedef struct {
313 Colour col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
314 Font font, bfont, ifont, ibfont;
315 GC gc;
316 } DC;
317
318 static void die(const char *, ...);
319 static void draw(void);
320 static void redraw(int);
321 static void drawregion(int, int, int, int);
322 static void execsh(void);
323 static void sigchld(int);
324 static void run(void);
325
326 static void csidump(void);
327 static void csihandle(void);
328 static void csiparse(void);
329 static void csireset(void);
330 static void strdump(void);
331 static void strhandle(void);
332 static void strparse(void);
333 static void strreset(void);
334
335 static int tattrset(int);
336 static void tclearregion(int, int, int, int);
337 static void tcursor(int);
338 static void tdeletechar(int);
339 static void tdeleteline(int);
340 static void tinsertblank(int);
341 static void tinsertblankline(int);
342 static void tmoveto(int, int);
343 static void tmoveato(int x, int y);
344 static void tnew(int, int);
345 static void tnewline(int);
346 static void tputtab(bool);
347 static void tputc(char *, int);
348 static void treset(void);
349 static int tresize(int, int);
350 static void tscrollup(int, int);
351 static void tscrolldown(int, int);
352 static void tsetattr(int*, int);
353 static void tsetchar(char *, Glyph *, int, int);
354 static void tsetscroll(int, int);
355 static void tswapscreen(void);
356 static void tsetdirt(int, int);
357 static void tsetdirtattr(int);
358 static void tsetmode(bool, bool, int *, int);
359 static void tfulldirt(void);
360 static void techo(char *, int);
361
362 static inline bool match(uint, uint);
363 static void ttynew(void);
364 static void ttyread(void);
365 static void ttyresize(void);
366 static void ttywrite(const char *, size_t);
367
368 static void xdraws(char *, Glyph, int, int, int, int);
369 static void xhints(void);
370 static void xclear(int, int, int, int);
371 static void xdrawcursor(void);
372 static void xinit(void);
373 static void xloadcols(void);
374 static int xsetcolorname(int, const char *);
375 static int xloadfont(Font *, FcPattern *);
376 static void xloadfonts(char *, int);
377 static int xloadfontset(Font *);
378 static void xsettitle(char *);
379 static void xresettitle(void);
380 static void xsetpointermotion(int);
381 static void xseturgency(int);
382 static void xsetsel(char*);
383 static void xtermclear(int, int, int, int);
384 static void xunloadfont(Font *f);
385 static void xunloadfonts(void);
386 static void xresize(int, int);
387
388 static void expose(XEvent *);
389 static void visibility(XEvent *);
390 static void unmap(XEvent *);
391 static char *kmap(KeySym, uint);
392 static void kpress(XEvent *);
393 static void cmessage(XEvent *);
394 static void cresize(int, int);
395 static void resize(XEvent *);
396 static void focus(XEvent *);
397 static void brelease(XEvent *);
398 static void bpress(XEvent *);
399 static void bmotion(XEvent *);
400 static void selnotify(XEvent *);
401 static void selclear(XEvent *);
402 static void selrequest(XEvent *);
403
404 static void selinit(void);
405 static void selsort(void);
406 static inline bool selected(int, int);
407 static void selcopy(void);
408 static void selscroll(int, int);
409 static void selsnap(int, int *, int *, int);
410
411 static int utf8decode(char *, long *);
412 static int utf8encode(long *, char *);
413 static int utf8size(char *);
414 static int isfullutf8(char *, int);
415
416 static ssize_t xwrite(int, char *, size_t);
417 static void *xmalloc(size_t);
418 static void *xrealloc(void *, size_t);
419 static void *xcalloc(size_t, size_t);
420
421 static void (*handler[LASTEvent])(XEvent *) = {
422 [KeyPress] = kpress,
423 [ClientMessage] = cmessage,
424 [ConfigureNotify] = resize,
425 [VisibilityNotify] = visibility,
426 [UnmapNotify] = unmap,
427 [Expose] = expose,
428 [FocusIn] = focus,
429 [FocusOut] = focus,
430 [MotionNotify] = bmotion,
431 [ButtonPress] = bpress,
432 [ButtonRelease] = brelease,
433 [SelectionClear] = selclear,
434 [SelectionNotify] = selnotify,
435 [SelectionRequest] = selrequest,
436 };
437
438 /* Globals */
439 static DC dc;
440 static XWindow xw;
441 static Term term;
442 static CSIEscape csiescseq;
443 static STREscape strescseq;
444 static int cmdfd;
445 static pid_t pid;
446 static Selection sel;
447 static int iofd = -1;
448 static char **opt_cmd = NULL;
449 static char *opt_io = NULL;
450 static char *opt_title = NULL;
451 static char *opt_embed = NULL;
452 static char *opt_class = NULL;
453 static char *opt_font = NULL;
454 static int oldbutton = 3; /* button event on startup: 3 = release */
455
456 static char *usedfont = NULL;
457 static int usedfontsize = 0;
458
459 /* Font Ring Cache */
460 enum {
461 FRC_NORMAL,
462 FRC_ITALIC,
463 FRC_BOLD,
464 FRC_ITALICBOLD
465 };
466
467 typedef struct {
468 XftFont *font;
469 long c;
470 int flags;
471 } Fontcache;
472
473 /*
474 * Fontcache is a ring buffer, with frccur as current position and frclen as
475 * the current length of used elements.
476 */
477
478 static Fontcache frc[1024];
479 static int frccur = -1, frclen = 0;
480
481 ssize_t
482 xwrite(int fd, char *s, size_t len) {
483 size_t aux = len;
484
485 while(len > 0) {
486 ssize_t r = write(fd, s, len);
487 if(r < 0)
488 return r;
489 len -= r;
490 s += r;
491 }
492 return aux;
493 }
494
495 void *
496 xmalloc(size_t len) {
497 void *p = malloc(len);
498
499 if(!p)
500 die("Out of memory\n");
501
502 return p;
503 }
504
505 void *
506 xrealloc(void *p, size_t len) {
507 if((p = realloc(p, len)) == NULL)
508 die("Out of memory\n");
509
510 return p;
511 }
512
513 void *
514 xcalloc(size_t nmemb, size_t size) {
515 void *p = calloc(nmemb, size);
516
517 if(!p)
518 die("Out of memory\n");
519
520 return p;
521 }
522
523 int
524 utf8decode(char *s, long *u) {
525 uchar c;
526 int i, n, rtn;
527
528 rtn = 1;
529 c = *s;
530 if(~c & B7) { /* 0xxxxxxx */
531 *u = c;
532 return rtn;
533 } else if((c & (B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */
534 *u = c&(B4|B3|B2|B1|B0);
535 n = 1;
536 } else if((c & (B7|B6|B5|B4)) == (B7|B6|B5)) { /* 1110xxxx */
537 *u = c&(B3|B2|B1|B0);
538 n = 2;
539 } else if((c & (B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) { /* 11110xxx */
540 *u = c & (B2|B1|B0);
541 n = 3;
542 } else {
543 goto invalid;
544 }
545
546 for(i = n, ++s; i > 0; --i, ++rtn, ++s) {
547 c = *s;
548 if((c & (B7|B6)) != B7) /* 10xxxxxx */
549 goto invalid;
550 *u <<= 6;
551 *u |= c & (B5|B4|B3|B2|B1|B0);
552 }
553
554 if((n == 1 && *u < 0x80) ||
555 (n == 2 && *u < 0x800) ||
556 (n == 3 && *u < 0x10000) ||
557 (*u >= 0xD800 && *u <= 0xDFFF)) {
558 goto invalid;
559 }
560
561 return rtn;
562 invalid:
563 *u = 0xFFFD;
564
565 return rtn;
566 }
567
568 int
569 utf8encode(long *u, char *s) {
570 uchar *sp;
571 ulong uc;
572 int i, n;
573
574 sp = (uchar *)s;
575 uc = *u;
576 if(uc < 0x80) {
577 *sp = uc; /* 0xxxxxxx */
578 return 1;
579 } else if(*u < 0x800) {
580 *sp = (uc >> 6) | (B7|B6); /* 110xxxxx */
581 n = 1;
582 } else if(uc < 0x10000) {
583 *sp = (uc >> 12) | (B7|B6|B5); /* 1110xxxx */
584 n = 2;
585 } else if(uc <= 0x10FFFF) {
586 *sp = (uc >> 18) | (B7|B6|B5|B4); /* 11110xxx */
587 n = 3;
588 } else {
589 goto invalid;
590 }
591
592 for(i=n,++sp; i>0; --i,++sp)
593 *sp = ((uc >> 6*(i-1)) & (B5|B4|B3|B2|B1|B0)) | B7; /* 10xxxxxx */
594
595 return n+1;
596 invalid:
597 /* U+FFFD */
598 *s++ = '\xEF';
599 *s++ = '\xBF';
600 *s = '\xBD';
601
602 return 3;
603 }
604
605 /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
606 UTF-8 otherwise return 0 */
607 int
608 isfullutf8(char *s, int b) {
609 uchar *c1, *c2, *c3;
610
611 c1 = (uchar *)s;
612 c2 = (uchar *)++s;
613 c3 = (uchar *)++s;
614 if(b < 1) {
615 return 0;
616 } else if((*c1&(B7|B6|B5)) == (B7|B6) && b == 1) {
617 return 0;
618 } else if((*c1&(B7|B6|B5|B4)) == (B7|B6|B5) &&
619 ((b == 1) ||
620 ((b == 2) && (*c2&(B7|B6)) == B7))) {
621 return 0;
622 } else if((*c1&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4) &&
623 ((b == 1) ||
624 ((b == 2) && (*c2&(B7|B6)) == B7) ||
625 ((b == 3) && (*c2&(B7|B6)) == B7 && (*c3&(B7|B6)) == B7))) {
626 return 0;
627 } else {
628 return 1;
629 }
630 }
631
632 int
633 utf8size(char *s) {
634 uchar c = *s;
635
636 if(~c&B7) {
637 return 1;
638 } else if((c&(B7|B6|B5)) == (B7|B6)) {
639 return 2;
640 } else if((c&(B7|B6|B5|B4)) == (B7|B6|B5)) {
641 return 3;
642 } else {
643 return 4;
644 }
645 }
646
647 static void
648 selinit(void) {
649 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
650 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
651 sel.mode = 0;
652 sel.ob.x = -1;
653 sel.clip = NULL;
654 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
655 if(sel.xtarget == None)
656 sel.xtarget = XA_STRING;
657 }
658
659 static int
660 x2col(int x) {
661 x -= borderpx;
662 x /= xw.cw;
663
664 return LIMIT(x, 0, term.col-1);
665 }
666
667 static int
668 y2row(int y) {
669 y -= borderpx;
670 y /= xw.ch;
671
672 return LIMIT(y, 0, term.row-1);
673 }
674
675 static void
676 selsort(void) {
677 if(sel.ob.y == sel.oe.y) {
678 sel.nb.x = MIN(sel.ob.x, sel.oe.x);
679 sel.ne.x = MAX(sel.ob.x, sel.oe.x);
680 } else {
681 sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
682 sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
683 }
684 sel.nb.y = MIN(sel.ob.y, sel.oe.y);
685 sel.ne.y = MAX(sel.ob.y, sel.oe.y);
686 }
687
688 static inline bool
689 selected(int x, int y) {
690 if(sel.ne.y == y && sel.nb.y == y)
691 return BETWEEN(x, sel.nb.x, sel.ne.x);
692
693 if(sel.type == SEL_RECTANGULAR) {
694 return ((sel.nb.y <= y && y <= sel.ne.y)
695 && (sel.nb.x <= x && x <= sel.ne.x));
696 }
697
698 return ((sel.nb.y < y && y < sel.ne.y)
699 || (y == sel.ne.y && x <= sel.ne.x))
700 || (y == sel.nb.y && x >= sel.nb.x
701 && (x <= sel.ne.x || sel.nb.y != sel.ne.y));
702 }
703
704 void
705 selsnap(int mode, int *x, int *y, int direction) {
706 int i;
707
708 switch(mode) {
709 case SNAP_WORD:
710 /*
711 * Snap around if the word wraps around at the end or
712 * beginning of a line.
713 */
714 for(;;) {
715 if(direction < 0 && *x <= 0) {
716 if(*y > 0 && term.line[*y - 1][term.col-1].mode
717 & ATTR_WRAP) {
718 *y -= 1;
719 *x = term.col-1;
720 } else {
721 break;
722 }
723 }
724 if(direction > 0 && *x >= term.col-1) {
725 if(*y < term.row-1 && term.line[*y][*x].mode
726 & ATTR_WRAP) {
727 *y += 1;
728 *x = 0;
729 } else {
730 break;
731 }
732 }
733
734 if(strchr(worddelimiters,
735 term.line[*y][*x + direction].c[0])) {
736 break;
737 }
738
739 *x += direction;
740 }
741 break;
742 case SNAP_LINE:
743 /*
744 * Snap around if the the previous line or the current one
745 * has set ATTR_WRAP at its end. Then the whole next or
746 * previous line will be selected.
747 */
748 *x = (direction < 0) ? 0 : term.col - 1;
749 if(direction < 0 && *y > 0) {
750 for(; *y > 0; *y += direction) {
751 if(!(term.line[*y-1][term.col-1].mode
752 & ATTR_WRAP)) {
753 break;
754 }
755 }
756 } else if(direction > 0 && *y < term.row-1) {
757 for(; *y < term.row; *y += direction) {
758 if(!(term.line[*y][term.col-1].mode
759 & ATTR_WRAP)) {
760 break;
761 }
762 }
763 }
764 break;
765 default:
766 /*
767 * Select the whole line when the end of line is reached.
768 */
769 if(direction > 0) {
770 i = term.col;
771 while(--i > 0 && term.line[*y][i].c[0] == ' ')
772 /* nothing */;
773 if(i > 0 && i < *x)
774 *x = term.col - 1;
775 }
776 break;
777 }
778 }
779
780 void
781 getbuttoninfo(XEvent *e) {
782 int type;
783 uint state = e->xbutton.state &~Button1Mask;
784
785 sel.alt = IS_SET(MODE_ALTSCREEN);
786
787 sel.oe.x = x2col(e->xbutton.x);
788 sel.oe.y = y2row(e->xbutton.y);
789
790 if(sel.ob.y < sel.oe.y
791 || (sel.ob.y == sel.oe.y && sel.ob.x < sel.oe.x)) {
792 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
793 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
794 } else {
795 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, -1);
796 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, +1);
797 }
798 selsort();
799
800 sel.type = SEL_REGULAR;
801 for(type = 1; type < LEN(selmasks); ++type) {
802 if(match(selmasks[type], state)) {
803 sel.type = type;
804 break;
805 }
806 }
807 }
808
809 void
810 mousereport(XEvent *e) {
811 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
812 button = e->xbutton.button, state = e->xbutton.state,
813 len;
814 char buf[40];
815 static int ox, oy;
816
817 /* from urxvt */
818 if(e->xbutton.type == MotionNotify) {
819 if(x == ox && y == oy)
820 return;
821 if(!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
822 return;
823 /* MOUSE_MOTION: no reporting if no button is pressed */
824 if(IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
825 return;
826
827 button = oldbutton + 32;
828 ox = x;
829 oy = y;
830 } else if(!IS_SET(MODE_MOUSESGR)
831 && (e->xbutton.type == ButtonRelease
832 || button == AnyButton)) {
833 button = 3;
834 } else {
835 button -= Button1;
836 if(button >= 3)
837 button += 64 - 3;
838 if(e->xbutton.type == ButtonPress) {
839 oldbutton = button;
840 ox = x;
841 oy = y;
842 }
843 }
844
845 if(!IS_SET(MODE_MOUSEX10)) {
846 button += (state & ShiftMask ? 4 : 0)
847 + (state & Mod4Mask ? 8 : 0)
848 + (state & ControlMask ? 16 : 0);
849 }
850
851 len = 0;
852 if(IS_SET(MODE_MOUSESGR)) {
853 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
854 button, x+1, y+1,
855 e->xbutton.type == ButtonRelease ? 'm' : 'M');
856 } else if(x < 223 && y < 223) {
857 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
858 IS_SET(MODE_MOUSEX10)? button-1 : 32+button,
859 32+x+1, 32+y+1);
860 } else {
861 return;
862 }
863
864 ttywrite(buf, len);
865 }
866
867 void
868 bpress(XEvent *e) {
869 struct timeval now;
870 Mousekey *mk;
871
872 if(IS_SET(MODE_MOUSE)) {
873 mousereport(e);
874 return;
875 }
876
877 for(mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
878 if(e->xbutton.button == mk->b
879 && match(mk->mask, e->xbutton.state)) {
880 ttywrite(mk->s, strlen(mk->s));
881 if(IS_SET(MODE_ECHO))
882 techo(mk->s, strlen(mk->s));
883 return;
884 }
885 }
886
887 if(e->xbutton.button == Button1) {
888 gettimeofday(&now, NULL);
889
890 /* Clear previous selection, logically and visually. */
891 if(sel.ob.x != -1) {
892 sel.ob.x = -1;
893 tsetdirt(sel.nb.y, sel.ne.y);
894 draw();
895 }
896 sel.mode = 1;
897 sel.type = SEL_REGULAR;
898 sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
899 sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
900
901 /*
902 * If the user clicks below predefined timeouts specific
903 * snapping behaviour is exposed.
904 */
905 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
906 sel.snap = SNAP_LINE;
907 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
908 sel.snap = SNAP_WORD;
909 } else {
910 sel.snap = 0;
911 }
912 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
913 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
914 selsort();
915
916 /*
917 * Draw selection, unless it's regular and we don't want to
918 * make clicks visible
919 */
920 if(sel.snap != 0) {
921 sel.mode++;
922 tsetdirt(sel.nb.y, sel.ne.y);
923 draw();
924 }
925 sel.tclick2 = sel.tclick1;
926 sel.tclick1 = now;
927 }
928 }
929
930 void
931 selcopy(void) {
932 char *str, *ptr;
933 int x, y, bufsize, size, i, ex;
934 Glyph *gp, *last;
935
936 if(sel.ob.x == -1) {
937 str = NULL;
938 } else {
939 bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
940 ptr = str = xmalloc(bufsize);
941
942 /* append every set & selected glyph to the selection */
943 for(y = sel.nb.y; y < sel.ne.y + 1; y++) {
944 gp = &term.line[y][0];
945 last = gp + term.col;
946
947 while(--last >= gp && !(selected(last - gp, y) && \
948 strcmp(last->c, " ") != 0))
949 /* nothing */;
950
951 for(x = 0; gp <= last; x++, ++gp) {
952 if(!selected(x, y))
953 continue;
954
955 size = utf8size(gp->c);
956 memcpy(ptr, gp->c, size);
957 ptr += size;
958 }
959
960 /*
961 * Copy and pasting of line endings is inconsistent
962 * in the inconsistent terminal and GUI world.
963 * The best solution seems like to produce '\n' when
964 * something is copied from st and convert '\n' to
965 * '\r', when something to be pasted is received by
966 * st.
967 * FIXME: Fix the computer world.
968 */
969 if(y < sel.ne.y && !((gp-1)->mode & ATTR_WRAP))
970 *ptr++ = '\n';
971
972 /*
973 * If the last selected line expands in the selection
974 * after the visible text '\n' is appended.
975 */
976 if(y == sel.ne.y) {
977 i = term.col;
978 while(--i > 0 && term.line[y][i].c[0] == ' ')
979 /* nothing */;
980 ex = sel.ne.x;
981 if(sel.nb.y == sel.ne.y && sel.ne.x < sel.nb.x)
982 ex = sel.nb.x;
983 if(i < ex)
984 *ptr++ = '\n';
985 }
986 }
987 *ptr = 0;
988 }
989 xsetsel(str);
990 }
991
992 void
993 selnotify(XEvent *e) {
994 ulong nitems, ofs, rem;
995 int format;
996 uchar *data, *last, *repl;
997 Atom type;
998
999 ofs = 0;
1000 do {
1001 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
1002 False, AnyPropertyType, &type, &format,
1003 &nitems, &rem, &data)) {
1004 fprintf(stderr, "Clipboard allocation failed\n");
1005 return;
1006 }
1007
1008 /*
1009 * As seen in selcopy:
1010 * Line endings are inconsistent in the terminal and GUI world
1011 * copy and pasting. When receiving some selection data,
1012 * replace all '\n' with '\r'.
1013 * FIXME: Fix the computer world.
1014 */
1015 repl = data;
1016 last = data + nitems * format / 8;
1017 while((repl = memchr(repl, '\n', last - repl))) {
1018 *repl++ = '\r';
1019 }
1020
1021 ttywrite((const char *)data, nitems * format / 8);
1022 XFree(data);
1023 /* number of 32-bit chunks returned */
1024 ofs += nitems * format / 32;
1025 } while(rem > 0);
1026 }
1027
1028 void
1029 selpaste(const Arg *dummy) {
1030 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
1031 xw.win, CurrentTime);
1032 }
1033
1034 void
1035 clippaste(const Arg *dummy) {
1036 Atom clipboard;
1037
1038 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1039 XConvertSelection(xw.dpy, clipboard, sel.xtarget, XA_PRIMARY,
1040 xw.win, CurrentTime);
1041 }
1042
1043 void
1044 selclear(XEvent *e) {
1045 if(sel.ob.x == -1)
1046 return;
1047 sel.ob.x = -1;
1048 tsetdirt(sel.nb.y, sel.ne.y);
1049 }
1050
1051 void
1052 selrequest(XEvent *e) {
1053 XSelectionRequestEvent *xsre;
1054 XSelectionEvent xev;
1055 Atom xa_targets, string;
1056
1057 xsre = (XSelectionRequestEvent *) e;
1058 xev.type = SelectionNotify;
1059 xev.requestor = xsre->requestor;
1060 xev.selection = xsre->selection;
1061 xev.target = xsre->target;
1062 xev.time = xsre->time;
1063 /* reject */
1064 xev.property = None;
1065
1066 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
1067 if(xsre->target == xa_targets) {
1068 /* respond with the supported type */
1069 string = sel.xtarget;
1070 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1071 XA_ATOM, 32, PropModeReplace,
1072 (uchar *) &string, 1);
1073 xev.property = xsre->property;
1074 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
1075 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1076 xsre->target, 8, PropModeReplace,
1077 (uchar *) sel.clip, strlen(sel.clip));
1078 xev.property = xsre->property;
1079 }
1080
1081 /* all done, send a notification to the listener */
1082 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
1083 fprintf(stderr, "Error sending SelectionNotify event\n");
1084 }
1085
1086 void
1087 xsetsel(char *str) {
1088 /* register the selection for both the clipboard and the primary */
1089 Atom clipboard;
1090
1091 free(sel.clip);
1092 sel.clip = str;
1093
1094 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
1095
1096 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1097 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
1098 }
1099
1100 void
1101 brelease(XEvent *e) {
1102 if(IS_SET(MODE_MOUSE)) {
1103 mousereport(e);
1104 return;
1105 }
1106
1107 if(e->xbutton.button == Button2) {
1108 selpaste(NULL);
1109 } else if(e->xbutton.button == Button1) {
1110 if(sel.mode < 2) {
1111 sel.ob.x = -1;
1112 } else {
1113 getbuttoninfo(e);
1114 selcopy();
1115 }
1116 sel.mode = 0;
1117 tsetdirt(sel.nb.y, sel.ne.y);
1118 }
1119 }
1120
1121 void
1122 bmotion(XEvent *e) {
1123 int oldey, oldex, oldsby, oldsey;
1124
1125 if(IS_SET(MODE_MOUSE)) {
1126 mousereport(e);
1127 return;
1128 }
1129
1130 if(!sel.mode)
1131 return;
1132
1133 sel.mode++;
1134 oldey = sel.oe.y;
1135 oldex = sel.oe.x;
1136 oldsby = sel.nb.y;
1137 oldsey = sel.ne.y;
1138 getbuttoninfo(e);
1139
1140 if(oldey != sel.oe.y || oldex != sel.oe.x)
1141 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
1142 }
1143
1144 void
1145 die(const char *errstr, ...) {
1146 va_list ap;
1147
1148 va_start(ap, errstr);
1149 vfprintf(stderr, errstr, ap);
1150 va_end(ap);
1151 exit(EXIT_FAILURE);
1152 }
1153
1154 void
1155 execsh(void) {
1156 char **args;
1157 char *envshell = getenv("SHELL");
1158 const struct passwd *pass = getpwuid(getuid());
1159 char buf[sizeof(long) * 8 + 1];
1160
1161 unsetenv("COLUMNS");
1162 unsetenv("LINES");
1163 unsetenv("TERMCAP");
1164
1165 if(pass) {
1166 setenv("LOGNAME", pass->pw_name, 1);
1167 setenv("USER", pass->pw_name, 1);
1168 setenv("SHELL", pass->pw_shell, 0);
1169 setenv("HOME", pass->pw_dir, 0);
1170 }
1171
1172 snprintf(buf, sizeof(buf), "%lu", xw.win);
1173 setenv("WINDOWID", buf, 1);
1174
1175 signal(SIGCHLD, SIG_DFL);
1176 signal(SIGHUP, SIG_DFL);
1177 signal(SIGINT, SIG_DFL);
1178 signal(SIGQUIT, SIG_DFL);
1179 signal(SIGTERM, SIG_DFL);
1180 signal(SIGALRM, SIG_DFL);
1181
1182 DEFAULT(envshell, shell);
1183 setenv("TERM", termname, 1);
1184 args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
1185 execvp(args[0], args);
1186 exit(EXIT_FAILURE);
1187 }
1188
1189 void
1190 sigchld(int a) {
1191 int stat = 0;
1192
1193 if(waitpid(pid, &stat, 0) < 0)
1194 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
1195
1196 if(WIFEXITED(stat)) {
1197 exit(WEXITSTATUS(stat));
1198 } else {
1199 exit(EXIT_FAILURE);
1200 }
1201 }
1202
1203 void
1204 ttynew(void) {
1205 int m, s;
1206 struct winsize w = {term.row, term.col, 0, 0};
1207
1208 /* seems to work fine on linux, openbsd and freebsd */
1209 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1210 die("openpty failed: %s\n", SERRNO);
1211
1212 switch(pid = fork()) {
1213 case -1:
1214 die("fork failed\n");
1215 break;
1216 case 0:
1217 setsid(); /* create a new process group */
1218 dup2(s, STDIN_FILENO);
1219 dup2(s, STDOUT_FILENO);
1220 dup2(s, STDERR_FILENO);
1221 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1222 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
1223 close(s);
1224 close(m);
1225 execsh();
1226 break;
1227 default:
1228 close(s);
1229 cmdfd = m;
1230 signal(SIGCHLD, sigchld);
1231 if(opt_io) {
1232 iofd = (!strcmp(opt_io, "-")) ?
1233 STDOUT_FILENO :
1234 open(opt_io, O_WRONLY | O_CREAT, 0666);
1235 if(iofd < 0) {
1236 fprintf(stderr, "Error opening %s:%s\n",
1237 opt_io, strerror(errno));
1238 }
1239 }
1240 }
1241 }
1242
1243 void
1244 dump(char c) {
1245 static int col;
1246
1247 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
1248 if(++col % 10 == 0)
1249 fprintf(stderr, "\n");
1250 }
1251
1252 void
1253 ttyread(void) {
1254 static char buf[BUFSIZ];
1255 static int buflen = 0;
1256 char *ptr;
1257 char s[UTF_SIZ];
1258 int charsize; /* size of utf8 char in bytes */
1259 long utf8c;
1260 int ret;
1261
1262 /* append read bytes to unprocessed bytes */
1263 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1264 die("Couldn't read from shell: %s\n", SERRNO);
1265
1266 /* process every complete utf8 char */
1267 buflen += ret;
1268 ptr = buf;
1269 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
1270 charsize = utf8decode(ptr, &utf8c);
1271 utf8encode(&utf8c, s);
1272 tputc(s, charsize);
1273 ptr += charsize;
1274 buflen -= charsize;
1275 }
1276
1277 /* keep any uncomplete utf8 char for the next call */
1278 memmove(buf, ptr, buflen);
1279 }
1280
1281 void
1282 ttywrite(const char *s, size_t n) {
1283 if(write(cmdfd, s, n) == -1)
1284 die("write error on tty: %s\n", SERRNO);
1285 }
1286
1287 void
1288 ttyresize(void) {
1289 struct winsize w;
1290
1291 w.ws_row = term.row;
1292 w.ws_col = term.col;
1293 w.ws_xpixel = xw.tw;
1294 w.ws_ypixel = xw.th;
1295 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1296 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
1297 }
1298
1299 int
1300 tattrset(int attr) {
1301 int i, j;
1302
1303 for(i = 0; i < term.row-1; i++) {
1304 for(j = 0; j < term.col-1; j++) {
1305 if(term.line[i][j].mode & attr)
1306 return 1;
1307 }
1308 }
1309
1310 return 0;
1311 }
1312
1313 void
1314 tsetdirt(int top, int bot) {
1315 int i;
1316
1317 LIMIT(top, 0, term.row-1);
1318 LIMIT(bot, 0, term.row-1);
1319
1320 for(i = top; i <= bot; i++)
1321 term.dirty[i] = 1;
1322 }
1323
1324 void
1325 tsetdirtattr(int attr) {
1326 int i, j;
1327
1328 for(i = 0; i < term.row-1; i++) {
1329 for(j = 0; j < term.col-1; j++) {
1330 if(term.line[i][j].mode & attr) {
1331 tsetdirt(i, i);
1332 break;
1333 }
1334 }
1335 }
1336 }
1337
1338 void
1339 tfulldirt(void) {
1340 tsetdirt(0, term.row-1);
1341 }
1342
1343 void
1344 tcursor(int mode) {
1345 static TCursor c;
1346
1347 if(mode == CURSOR_SAVE) {
1348 c = term.c;
1349 } else if(mode == CURSOR_LOAD) {
1350 term.c = c;
1351 tmoveto(c.x, c.y);
1352 }
1353 }
1354
1355 void
1356 treset(void) {
1357 uint i;
1358
1359 term.c = (TCursor){{
1360 .mode = ATTR_NULL,
1361 .fg = defaultfg,
1362 .bg = defaultbg
1363 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1364
1365 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1366 for(i = tabspaces; i < term.col; i += tabspaces)
1367 term.tabs[i] = 1;
1368 term.top = 0;
1369 term.bot = term.row - 1;
1370 term.mode = MODE_WRAP;
1371
1372 tclearregion(0, 0, term.col-1, term.row-1);
1373 tmoveto(0, 0);
1374 tcursor(CURSOR_SAVE);
1375 }
1376
1377 void
1378 tnew(int col, int row) {
1379 memset(&term, 0, sizeof(Term));
1380 tresize(col, row);
1381 term.numlock = 1;
1382
1383 treset();
1384 }
1385
1386 void
1387 tswapscreen(void) {
1388 Line *tmp = term.line;
1389
1390 term.line = term.alt;
1391 term.alt = tmp;
1392 term.mode ^= MODE_ALTSCREEN;
1393 tfulldirt();
1394 }
1395
1396 void
1397 tscrolldown(int orig, int n) {
1398 int i;
1399 Line temp;
1400
1401 LIMIT(n, 0, term.bot-orig+1);
1402
1403 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1404
1405 for(i = term.bot; i >= orig+n; i--) {
1406 temp = term.line[i];
1407 term.line[i] = term.line[i-n];
1408 term.line[i-n] = temp;
1409
1410 term.dirty[i] = 1;
1411 term.dirty[i-n] = 1;
1412 }
1413
1414 selscroll(orig, n);
1415 }
1416
1417 void
1418 tscrollup(int orig, int n) {
1419 int i;
1420 Line temp;
1421 LIMIT(n, 0, term.bot-orig+1);
1422
1423 tclearregion(0, orig, term.col-1, orig+n-1);
1424
1425 for(i = orig; i <= term.bot-n; i++) {
1426 temp = term.line[i];
1427 term.line[i] = term.line[i+n];
1428 term.line[i+n] = temp;
1429
1430 term.dirty[i] = 1;
1431 term.dirty[i+n] = 1;
1432 }
1433
1434 selscroll(orig, -n);
1435 }
1436
1437 void
1438 selscroll(int orig, int n) {
1439 if(sel.ob.x == -1)
1440 return;
1441
1442 if(BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
1443 if((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
1444 sel.ob.x = -1;
1445 return;
1446 }
1447 if(sel.type == SEL_RECTANGULAR) {
1448 if(sel.ob.y < term.top)
1449 sel.ob.y = term.top;
1450 if(sel.oe.y > term.bot)
1451 sel.oe.y = term.bot;
1452 } else {
1453 if(sel.ob.y < term.top) {
1454 sel.ob.y = term.top;
1455 sel.ob.x = 0;
1456 }
1457 if(sel.oe.y > term.bot) {
1458 sel.oe.y = term.bot;
1459 sel.oe.x = term.col;
1460 }
1461 }
1462 selsort();
1463 }
1464 }
1465
1466 void
1467 tnewline(int first_col) {
1468 int y = term.c.y;
1469
1470 if(y == term.bot) {
1471 tscrollup(term.top, 1);
1472 } else {
1473 y++;
1474 }
1475 tmoveto(first_col ? 0 : term.c.x, y);
1476 }
1477
1478 void
1479 csiparse(void) {
1480 char *p = csiescseq.buf, *np;
1481 long int v;
1482
1483 csiescseq.narg = 0;
1484 if(*p == '?') {
1485 csiescseq.priv = 1;
1486 p++;
1487 }
1488
1489 csiescseq.buf[csiescseq.len] = '\0';
1490 while(p < csiescseq.buf+csiescseq.len) {
1491 np = NULL;
1492 v = strtol(p, &np, 10);
1493 if(np == p)
1494 v = 0;
1495 if(v == LONG_MAX || v == LONG_MIN)
1496 v = -1;
1497 csiescseq.arg[csiescseq.narg++] = v;
1498 p = np;
1499 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1500 break;
1501 p++;
1502 }
1503 csiescseq.mode = *p;
1504 }
1505
1506 /* for absolute user moves, when decom is set */
1507 void
1508 tmoveato(int x, int y) {
1509 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1510 }
1511
1512 void
1513 tmoveto(int x, int y) {
1514 int miny, maxy;
1515
1516 if(term.c.state & CURSOR_ORIGIN) {
1517 miny = term.top;
1518 maxy = term.bot;
1519 } else {
1520 miny = 0;
1521 maxy = term.row - 1;
1522 }
1523 LIMIT(x, 0, term.col-1);
1524 LIMIT(y, miny, maxy);
1525 term.c.state &= ~CURSOR_WRAPNEXT;
1526 term.c.x = x;
1527 term.c.y = y;
1528 }
1529
1530 void
1531 tsetchar(char *c, Glyph *attr, int x, int y) {
1532 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1533 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1534 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1535 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1536 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1537 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1538 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1539 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1540 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1541 };
1542
1543 /*
1544 * The table is proudly stolen from rxvt.
1545 */
1546 if(attr->mode & ATTR_GFX) {
1547 if(c[0] >= 0x41 && c[0] <= 0x7e
1548 && vt100_0[c[0] - 0x41]) {
1549 c = vt100_0[c[0] - 0x41];
1550 }
1551 }
1552
1553 term.dirty[y] = 1;
1554 term.line[y][x] = *attr;
1555 memcpy(term.line[y][x].c, c, UTF_SIZ);
1556 }
1557
1558 void
1559 tclearregion(int x1, int y1, int x2, int y2) {
1560 int x, y, temp;
1561
1562 if(x1 > x2)
1563 temp = x1, x1 = x2, x2 = temp;
1564 if(y1 > y2)
1565 temp = y1, y1 = y2, y2 = temp;
1566
1567 LIMIT(x1, 0, term.col-1);
1568 LIMIT(x2, 0, term.col-1);
1569 LIMIT(y1, 0, term.row-1);
1570 LIMIT(y2, 0, term.row-1);
1571
1572 for(y = y1; y <= y2; y++) {
1573 term.dirty[y] = 1;
1574 for(x = x1; x <= x2; x++) {
1575 if(selected(x, y))
1576 selclear(NULL);
1577 term.line[y][x] = term.c.attr;
1578 memcpy(term.line[y][x].c, " ", 2);
1579 }
1580 }
1581 }
1582
1583 void
1584 tdeletechar(int n) {
1585 int src = term.c.x + n;
1586 int dst = term.c.x;
1587 int size = term.col - src;
1588
1589 term.dirty[term.c.y] = 1;
1590
1591 if(src >= term.col) {
1592 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1593 return;
1594 }
1595
1596 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1597 size * sizeof(Glyph));
1598 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1599 }
1600
1601 void
1602 tinsertblank(int n) {
1603 int src = term.c.x;
1604 int dst = src + n;
1605 int size = term.col - dst;
1606
1607 term.dirty[term.c.y] = 1;
1608
1609 if(dst >= term.col) {
1610 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1611 return;
1612 }
1613
1614 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1615 size * sizeof(Glyph));
1616 tclearregion(src, term.c.y, dst - 1, term.c.y);
1617 }
1618
1619 void
1620 tinsertblankline(int n) {
1621 if(term.c.y < term.top || term.c.y > term.bot)
1622 return;
1623
1624 tscrolldown(term.c.y, n);
1625 }
1626
1627 void
1628 tdeleteline(int n) {
1629 if(term.c.y < term.top || term.c.y > term.bot)
1630 return;
1631
1632 tscrollup(term.c.y, n);
1633 }
1634
1635 void
1636 tsetattr(int *attr, int l) {
1637 int i;
1638
1639 for(i = 0; i < l; i++) {
1640 switch(attr[i]) {
1641 case 0:
1642 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE \
1643 | ATTR_BOLD | ATTR_ITALIC \
1644 | ATTR_BLINK);
1645 term.c.attr.fg = defaultfg;
1646 term.c.attr.bg = defaultbg;
1647 break;
1648 case 1:
1649 term.c.attr.mode |= ATTR_BOLD;
1650 break;
1651 case 3:
1652 term.c.attr.mode |= ATTR_ITALIC;
1653 break;
1654 case 4:
1655 term.c.attr.mode |= ATTR_UNDERLINE;
1656 break;
1657 case 5: /* slow blink */
1658 case 6: /* rapid blink */
1659 term.c.attr.mode |= ATTR_BLINK;
1660 break;
1661 case 7:
1662 term.c.attr.mode |= ATTR_REVERSE;
1663 break;
1664 case 21:
1665 case 22:
1666 term.c.attr.mode &= ~ATTR_BOLD;
1667 break;
1668 case 23:
1669 term.c.attr.mode &= ~ATTR_ITALIC;
1670 break;
1671 case 24:
1672 term.c.attr.mode &= ~ATTR_UNDERLINE;
1673 break;
1674 case 25:
1675 case 26:
1676 term.c.attr.mode &= ~ATTR_BLINK;
1677 break;
1678 case 27:
1679 term.c.attr.mode &= ~ATTR_REVERSE;
1680 break;
1681 case 38:
1682 if(i + 2 < l && attr[i + 1] == 5) {
1683 i += 2;
1684 if(BETWEEN(attr[i], 0, 255)) {
1685 term.c.attr.fg = attr[i];
1686 } else {
1687 fprintf(stderr,
1688 "erresc: bad fgcolor %d\n",
1689 attr[i]);
1690 }
1691 } else {
1692 fprintf(stderr,
1693 "erresc(38): gfx attr %d unknown\n",
1694 attr[i]);
1695 }
1696 break;
1697 case 39:
1698 term.c.attr.fg = defaultfg;
1699 break;
1700 case 48:
1701 if(i + 2 < l && attr[i + 1] == 5) {
1702 i += 2;
1703 if(BETWEEN(attr[i], 0, 255)) {
1704 term.c.attr.bg = attr[i];
1705 } else {
1706 fprintf(stderr,
1707 "erresc: bad bgcolor %d\n",
1708 attr[i]);
1709 }
1710 } else {
1711 fprintf(stderr,
1712 "erresc(48): gfx attr %d unknown\n",
1713 attr[i]);
1714 }
1715 break;
1716 case 49:
1717 term.c.attr.bg = defaultbg;
1718 break;
1719 default:
1720 if(BETWEEN(attr[i], 30, 37)) {
1721 term.c.attr.fg = attr[i] - 30;
1722 } else if(BETWEEN(attr[i], 40, 47)) {
1723 term.c.attr.bg = attr[i] - 40;
1724 } else if(BETWEEN(attr[i], 90, 97)) {
1725 term.c.attr.fg = attr[i] - 90 + 8;
1726 } else if(BETWEEN(attr[i], 100, 107)) {
1727 term.c.attr.bg = attr[i] - 100 + 8;
1728 } else {
1729 fprintf(stderr,
1730 "erresc(default): gfx attr %d unknown\n",
1731 attr[i]), csidump();
1732 }
1733 break;
1734 }
1735 }
1736 }
1737
1738 void
1739 tsetscroll(int t, int b) {
1740 int temp;
1741
1742 LIMIT(t, 0, term.row-1);
1743 LIMIT(b, 0, term.row-1);
1744 if(t > b) {
1745 temp = t;
1746 t = b;
1747 b = temp;
1748 }
1749 term.top = t;
1750 term.bot = b;
1751 }
1752
1753 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1754
1755 void
1756 tsetmode(bool priv, bool set, int *args, int narg) {
1757 int *lim, mode;
1758 bool alt;
1759
1760 for(lim = args + narg; args < lim; ++args) {
1761 if(priv) {
1762 switch(*args) {
1763 break;
1764 case 1: /* DECCKM -- Cursor key */
1765 MODBIT(term.mode, set, MODE_APPCURSOR);
1766 break;
1767 case 5: /* DECSCNM -- Reverse video */
1768 mode = term.mode;
1769 MODBIT(term.mode, set, MODE_REVERSE);
1770 if(mode != term.mode)
1771 redraw(REDRAW_TIMEOUT);
1772 break;
1773 case 6: /* DECOM -- Origin */
1774 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1775 tmoveato(0, 0);
1776 break;
1777 case 7: /* DECAWM -- Auto wrap */
1778 MODBIT(term.mode, set, MODE_WRAP);
1779 break;
1780 case 0: /* Error (IGNORED) */
1781 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1782 case 3: /* DECCOLM -- Column (IGNORED) */
1783 case 4: /* DECSCLM -- Scroll (IGNORED) */
1784 case 8: /* DECARM -- Auto repeat (IGNORED) */
1785 case 18: /* DECPFF -- Printer feed (IGNORED) */
1786 case 19: /* DECPEX -- Printer extent (IGNORED) */
1787 case 42: /* DECNRCM -- National characters (IGNORED) */
1788 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1789 break;
1790 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1791 MODBIT(term.mode, !set, MODE_HIDE);
1792 break;
1793 case 9: /* X10 mouse compatibility mode */
1794 xsetpointermotion(0);
1795 MODBIT(term.mode, 0, MODE_MOUSE);
1796 MODBIT(term.mode, set, MODE_MOUSEX10);
1797 break;
1798 case 1000: /* 1000: report button press */
1799 xsetpointermotion(0);
1800 MODBIT(term.mode, 0, MODE_MOUSE);
1801 MODBIT(term.mode, set, MODE_MOUSEBTN);
1802 break;
1803 case 1002: /* 1002: report motion on button press */
1804 xsetpointermotion(0);
1805 MODBIT(term.mode, 0, MODE_MOUSE);
1806 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1807 break;
1808 case 1003: /* 1003: enable all mouse motions */
1809 xsetpointermotion(set);
1810 MODBIT(term.mode, 0, MODE_MOUSE);
1811 MODBIT(term.mode, set, MODE_MOUSEMANY);
1812 break;
1813 case 1004: /* 1004: send focus events to tty */
1814 MODBIT(term.mode, set, MODE_FOCUS);
1815 break;
1816 case 1006: /* 1006: extended reporting mode */
1817 MODBIT(term.mode, set, MODE_MOUSESGR);
1818 break;
1819 case 1034:
1820 MODBIT(term.mode, set, MODE_8BIT);
1821 break;
1822 case 1049: /* = 1047 and 1048 */
1823 case 47:
1824 case 1047:
1825 if (!allowaltscreen)
1826 break;
1827
1828 alt = IS_SET(MODE_ALTSCREEN);
1829 if(alt) {
1830 tclearregion(0, 0, term.col-1,
1831 term.row-1);
1832 }
1833 if(set ^ alt) /* set is always 1 or 0 */
1834 tswapscreen();
1835 if(*args != 1049)
1836 break;
1837 /* FALLTRU */
1838 case 1048:
1839 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1840 break;
1841 /* Not implemented mouse modes. See comments there. */
1842 case 1001: /* mouse highlight mode; can hang the
1843 terminal by design when implemented. */
1844 case 1005: /* UTF-8 mouse mode; will confuse
1845 applications not supporting UTF-8
1846 and luit. */
1847 case 1015: /* urxvt mangled mouse mode; incompatible
1848 and can be mistaken for other control
1849 codes. */
1850 default:
1851 fprintf(stderr,
1852 "erresc: unknown private set/reset mode %d\n",
1853 *args);
1854 break;
1855 }
1856 } else {
1857 switch(*args) {
1858 case 0: /* Error (IGNORED) */
1859 break;
1860 case 2: /* KAM -- keyboard action */
1861 MODBIT(term.mode, set, MODE_KBDLOCK);
1862 break;
1863 case 4: /* IRM -- Insertion-replacement */
1864 MODBIT(term.mode, set, MODE_INSERT);
1865 break;
1866 case 12: /* SRM -- Send/Receive */
1867 MODBIT(term.mode, !set, MODE_ECHO);
1868 break;
1869 case 20: /* LNM -- Linefeed/new line */
1870 MODBIT(term.mode, set, MODE_CRLF);
1871 break;
1872 default:
1873 fprintf(stderr,
1874 "erresc: unknown set/reset mode %d\n",
1875 *args);
1876 break;
1877 }
1878 }
1879 }
1880 }
1881
1882 void
1883 csihandle(void) {
1884 switch(csiescseq.mode) {
1885 default:
1886 unknown:
1887 fprintf(stderr, "erresc: unknown csi ");
1888 csidump();
1889 /* die(""); */
1890 break;
1891 case '@': /* ICH -- Insert <n> blank char */
1892 DEFAULT(csiescseq.arg[0], 1);
1893 tinsertblank(csiescseq.arg[0]);
1894 break;
1895 case 'A': /* CUU -- Cursor <n> Up */
1896 DEFAULT(csiescseq.arg[0], 1);
1897 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1898 break;
1899 case 'B': /* CUD -- Cursor <n> Down */
1900 case 'e': /* VPR --Cursor <n> Down */
1901 DEFAULT(csiescseq.arg[0], 1);
1902 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1903 break;
1904 case 'c': /* DA -- Device Attributes */
1905 if(csiescseq.arg[0] == 0)
1906 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1907 break;
1908 case 'C': /* CUF -- Cursor <n> Forward */
1909 case 'a': /* HPR -- Cursor <n> Forward */
1910 DEFAULT(csiescseq.arg[0], 1);
1911 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1912 break;
1913 case 'D': /* CUB -- Cursor <n> Backward */
1914 DEFAULT(csiescseq.arg[0], 1);
1915 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1916 break;
1917 case 'E': /* CNL -- Cursor <n> Down and first col */
1918 DEFAULT(csiescseq.arg[0], 1);
1919 tmoveto(0, term.c.y+csiescseq.arg[0]);
1920 break;
1921 case 'F': /* CPL -- Cursor <n> Up and first col */
1922 DEFAULT(csiescseq.arg[0], 1);
1923 tmoveto(0, term.c.y-csiescseq.arg[0]);
1924 break;
1925 case 'g': /* TBC -- Tabulation clear */
1926 switch(csiescseq.arg[0]) {
1927 case 0: /* clear current tab stop */
1928 term.tabs[term.c.x] = 0;
1929 break;
1930 case 3: /* clear all the tabs */
1931 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1932 break;
1933 default:
1934 goto unknown;
1935 }
1936 break;
1937 case 'G': /* CHA -- Move to <col> */
1938 case '`': /* HPA */
1939 DEFAULT(csiescseq.arg[0], 1);
1940 tmoveto(csiescseq.arg[0]-1, term.c.y);
1941 break;
1942 case 'H': /* CUP -- Move to <row> <col> */
1943 case 'f': /* HVP */
1944 DEFAULT(csiescseq.arg[0], 1);
1945 DEFAULT(csiescseq.arg[1], 1);
1946 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1947 break;
1948 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1949 DEFAULT(csiescseq.arg[0], 1);
1950 while(csiescseq.arg[0]--)
1951 tputtab(1);
1952 break;
1953 case 'J': /* ED -- Clear screen */
1954 sel.ob.x = -1;
1955 switch(csiescseq.arg[0]) {
1956 case 0: /* below */
1957 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1958 if(term.c.y < term.row-1) {
1959 tclearregion(0, term.c.y+1, term.col-1,
1960 term.row-1);
1961 }
1962 break;
1963 case 1: /* above */
1964 if(term.c.y > 1)
1965 tclearregion(0, 0, term.col-1, term.c.y-1);
1966 tclearregion(0, term.c.y, term.c.x, term.c.y);
1967 break;
1968 case 2: /* all */
1969 tclearregion(0, 0, term.col-1, term.row-1);
1970 break;
1971 default:
1972 goto unknown;
1973 }
1974 break;
1975 case 'K': /* EL -- Clear line */
1976 switch(csiescseq.arg[0]) {
1977 case 0: /* right */
1978 tclearregion(term.c.x, term.c.y, term.col-1,
1979 term.c.y);
1980 break;
1981 case 1: /* left */
1982 tclearregion(0, term.c.y, term.c.x, term.c.y);
1983 break;
1984 case 2: /* all */
1985 tclearregion(0, term.c.y, term.col-1, term.c.y);
1986 break;
1987 }
1988 break;
1989 case 'S': /* SU -- Scroll <n> line up */
1990 DEFAULT(csiescseq.arg[0], 1);
1991 tscrollup(term.top, csiescseq.arg[0]);
1992 break;
1993 case 'T': /* SD -- Scroll <n> line down */
1994 DEFAULT(csiescseq.arg[0], 1);
1995 tscrolldown(term.top, csiescseq.arg[0]);
1996 break;
1997 case 'L': /* IL -- Insert <n> blank lines */
1998 DEFAULT(csiescseq.arg[0], 1);
1999 tinsertblankline(csiescseq.arg[0]);
2000 break;
2001 case 'l': /* RM -- Reset Mode */
2002 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
2003 break;
2004 case 'M': /* DL -- Delete <n> lines */
2005 DEFAULT(csiescseq.arg[0], 1);
2006 tdeleteline(csiescseq.arg[0]);
2007 break;
2008 case 'X': /* ECH -- Erase <n> char */
2009 DEFAULT(csiescseq.arg[0], 1);
2010 tclearregion(term.c.x, term.c.y,
2011 term.c.x + csiescseq.arg[0] - 1, term.c.y);
2012 break;
2013 case 'P': /* DCH -- Delete <n> char */
2014 DEFAULT(csiescseq.arg[0], 1);
2015 tdeletechar(csiescseq.arg[0]);
2016 break;
2017 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
2018 DEFAULT(csiescseq.arg[0], 1);
2019 while(csiescseq.arg[0]--)
2020 tputtab(0);
2021 break;
2022 case 'd': /* VPA -- Move to <row> */
2023 DEFAULT(csiescseq.arg[0], 1);
2024 tmoveato(term.c.x, csiescseq.arg[0]-1);
2025 break;
2026 case 'h': /* SM -- Set terminal mode */
2027 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
2028 break;
2029 case 'm': /* SGR -- Terminal attribute (color) */
2030 tsetattr(csiescseq.arg, csiescseq.narg);
2031 break;
2032 case 'r': /* DECSTBM -- Set Scrolling Region */
2033 if(csiescseq.priv) {
2034 goto unknown;
2035 } else {
2036 DEFAULT(csiescseq.arg[0], 1);
2037 DEFAULT(csiescseq.arg[1], term.row);
2038 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
2039 tmoveato(0, 0);
2040 }
2041 break;
2042 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
2043 tcursor(CURSOR_SAVE);
2044 break;
2045 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
2046 tcursor(CURSOR_LOAD);
2047 break;
2048 }
2049 }
2050
2051 void
2052 csidump(void) {
2053 int i;
2054 uint c;
2055
2056 printf("ESC[");
2057 for(i = 0; i < csiescseq.len; i++) {
2058 c = csiescseq.buf[i] & 0xff;
2059 if(isprint(c)) {
2060 putchar(c);
2061 } else if(c == '\n') {
2062 printf("(\\n)");
2063 } else if(c == '\r') {
2064 printf("(\\r)");
2065 } else if(c == 0x1b) {
2066 printf("(\\e)");
2067 } else {
2068 printf("(%02x)", c);
2069 }
2070 }
2071 putchar('\n');
2072 }
2073
2074 void
2075 csireset(void) {
2076 memset(&csiescseq, 0, sizeof(csiescseq));
2077 }
2078
2079 void
2080 strhandle(void) {
2081 char *p = NULL;
2082 int i, j, narg;
2083
2084 strparse();
2085 narg = strescseq.narg;
2086
2087 switch(strescseq.type) {
2088 case ']': /* OSC -- Operating System Command */
2089 switch(i = atoi(strescseq.args[0])) {
2090 case 0:
2091 case 1:
2092 case 2:
2093 if(narg > 1)
2094 xsettitle(strescseq.args[1]);
2095 break;
2096 case 4: /* color set */
2097 if(narg < 3)
2098 break;
2099 p = strescseq.args[2];
2100 /* fall through */
2101 case 104: /* color reset, here p = NULL */
2102 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2103 if (!xsetcolorname(j, p)) {
2104 fprintf(stderr, "erresc: invalid color %s\n", p);
2105 } else {
2106 /*
2107 * TODO if defaultbg color is changed, borders
2108 * are dirty
2109 */
2110 redraw(0);
2111 }
2112 break;
2113 default:
2114 fprintf(stderr, "erresc: unknown str ");
2115 strdump();
2116 break;
2117 }
2118 break;
2119 case 'k': /* old title set compatibility */
2120 xsettitle(strescseq.args[0]);
2121 break;
2122 case 'P': /* DSC -- Device Control String */
2123 case '_': /* APC -- Application Program Command */
2124 case '^': /* PM -- Privacy Message */
2125 default:
2126 fprintf(stderr, "erresc: unknown str ");
2127 strdump();
2128 /* die(""); */
2129 break;
2130 }
2131 }
2132
2133 void
2134 strparse(void) {
2135 char *p = strescseq.buf;
2136
2137 strescseq.narg = 0;
2138 strescseq.buf[strescseq.len] = '\0';
2139 while(p && strescseq.narg < STR_ARG_SIZ)
2140 strescseq.args[strescseq.narg++] = strsep(&p, ";");
2141 }
2142
2143 void
2144 strdump(void) {
2145 int i;
2146 uint c;
2147
2148 printf("ESC%c", strescseq.type);
2149 for(i = 0; i < strescseq.len; i++) {
2150 c = strescseq.buf[i] & 0xff;
2151 if(c == '\0') {
2152 return;
2153 } else if(isprint(c)) {
2154 putchar(c);
2155 } else if(c == '\n') {
2156 printf("(\\n)");
2157 } else if(c == '\r') {
2158 printf("(\\r)");
2159 } else if(c == 0x1b) {
2160 printf("(\\e)");
2161 } else {
2162 printf("(%02x)", c);
2163 }
2164 }
2165 printf("ESC\\\n");
2166 }
2167
2168 void
2169 strreset(void) {
2170 memset(&strescseq, 0, sizeof(strescseq));
2171 }
2172
2173 void
2174 tputtab(bool forward) {
2175 uint x = term.c.x;
2176
2177 if(forward) {
2178 if(x == term.col)
2179 return;
2180 for(++x; x < term.col && !term.tabs[x]; ++x)
2181 /* nothing */ ;
2182 } else {
2183 if(x == 0)
2184 return;
2185 for(--x; x > 0 && !term.tabs[x]; --x)
2186 /* nothing */ ;
2187 }
2188 tmoveto(x, term.c.y);
2189 }
2190
2191 void
2192 techo(char *buf, int len) {
2193 for(; len > 0; buf++, len--) {
2194 char c = *buf;
2195
2196 if(c == '\033') { /* escape */
2197 tputc("^", 1);
2198 tputc("[", 1);
2199 } else if(c < '\x20') { /* control code */
2200 if(c != '\n' && c != '\r' && c != '\t') {
2201 c |= '\x40';
2202 tputc("^", 1);
2203 }
2204 tputc(&c, 1);
2205 } else {
2206 break;
2207 }
2208 }
2209 if(len)
2210 tputc(buf, len);
2211 }
2212
2213 void
2214 tputc(char *c, int len) {
2215 uchar ascii = *c;
2216 bool control = ascii < '\x20' || ascii == 0177;
2217
2218 if(iofd != -1) {
2219 if(xwrite(iofd, c, len) < 0) {
2220 fprintf(stderr, "Error writing in %s:%s\n",
2221 opt_io, strerror(errno));
2222 close(iofd);
2223 iofd = -1;
2224 }
2225 }
2226
2227 /*
2228 * STR sequences must be checked before anything else
2229 * because it can use some control codes as part of the sequence.
2230 */
2231 if(term.esc & ESC_STR) {
2232 switch(ascii) {
2233 case '\033':
2234 term.esc = ESC_START | ESC_STR_END;
2235 break;
2236 case '\a': /* backwards compatibility to xterm */
2237 term.esc = 0;
2238 strhandle();
2239 break;
2240 default:
2241 if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2242 memmove(&strescseq.buf[strescseq.len], c, len);
2243 strescseq.len += len;
2244 } else {
2245 /*
2246 * Here is a bug in terminals. If the user never sends
2247 * some code to stop the str or esc command, then st
2248 * will stop responding. But this is better than
2249 * silently failing with unknown characters. At least
2250 * then users will report back.
2251 *
2252 * In the case users ever get fixed, here is the code:
2253 */
2254 /*
2255 * term.esc = 0;
2256 * strhandle();
2257 */
2258 }
2259 }
2260 return;
2261 }
2262
2263 /*
2264 * Actions of control codes must be performed as soon they arrive
2265 * because they can be embedded inside a control sequence, and
2266 * they must not cause conflicts with sequences.
2267 */
2268 if(control) {
2269 switch(ascii) {
2270 case '\t': /* HT */
2271 tputtab(1);
2272 return;
2273 case '\b': /* BS */
2274 tmoveto(term.c.x-1, term.c.y);
2275 return;
2276 case '\r': /* CR */
2277 tmoveto(0, term.c.y);
2278 return;
2279 case '\f': /* LF */
2280 case '\v': /* VT */
2281 case '\n': /* LF */
2282 /* go to first col if the mode is set */
2283 tnewline(IS_SET(MODE_CRLF));
2284 return;
2285 case '\a': /* BEL */
2286 if(!(xw.state & WIN_FOCUSED))
2287 xseturgency(1);
2288 return;
2289 case '\033': /* ESC */
2290 csireset();
2291 term.esc = ESC_START;
2292 return;
2293 case '\016': /* SO */
2294 case '\017': /* SI */
2295 /*
2296 * Different charsets are hard to handle. Applications
2297 * should use the right alt charset escapes for the
2298 * only reason they still exist: line drawing. The
2299 * rest is incompatible history st should not support.
2300 */
2301 return;
2302 case '\032': /* SUB */
2303 case '\030': /* CAN */
2304 csireset();
2305 return;
2306 case '\005': /* ENQ (IGNORED) */
2307 case '\000': /* NUL (IGNORED) */
2308 case '\021': /* XON (IGNORED) */
2309 case '\023': /* XOFF (IGNORED) */
2310 case 0177: /* DEL (IGNORED) */
2311 return;
2312 }
2313 } else if(term.esc & ESC_START) {
2314 if(term.esc & ESC_CSI) {
2315 csiescseq.buf[csiescseq.len++] = ascii;
2316 if(BETWEEN(ascii, 0x40, 0x7E)
2317 || csiescseq.len >= \
2318 sizeof(csiescseq.buf)-1) {
2319 term.esc = 0;
2320 csiparse();
2321 csihandle();
2322 }
2323 } else if(term.esc & ESC_STR_END) {
2324 term.esc = 0;
2325 if(ascii == '\\')
2326 strhandle();
2327 } else if(term.esc & ESC_ALTCHARSET) {
2328 switch(ascii) {
2329 case '0': /* Line drawing set */
2330 term.c.attr.mode |= ATTR_GFX;
2331 break;
2332 case 'B': /* USASCII */
2333 term.c.attr.mode &= ~ATTR_GFX;
2334 break;
2335 case 'A': /* UK (IGNORED) */
2336 case '<': /* multinational charset (IGNORED) */
2337 case '5': /* Finnish (IGNORED) */
2338 case 'C': /* Finnish (IGNORED) */
2339 case 'K': /* German (IGNORED) */
2340 break;
2341 default:
2342 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2343 }
2344 term.esc = 0;
2345 } else if(term.esc & ESC_TEST) {
2346 if(ascii == '8') { /* DEC screen alignment test. */
2347 char E[UTF_SIZ] = "E";
2348 int x, y;
2349
2350 for(x = 0; x < term.col; ++x) {
2351 for(y = 0; y < term.row; ++y)
2352 tsetchar(E, &term.c.attr, x, y);
2353 }
2354 }
2355 term.esc = 0;
2356 } else {
2357 switch(ascii) {
2358 case '[':
2359 term.esc |= ESC_CSI;
2360 break;
2361 case '#':
2362 term.esc |= ESC_TEST;
2363 break;
2364 case 'P': /* DCS -- Device Control String */
2365 case '_': /* APC -- Application Program Command */
2366 case '^': /* PM -- Privacy Message */
2367 case ']': /* OSC -- Operating System Command */
2368 case 'k': /* old title set compatibility */
2369 strreset();
2370 strescseq.type = ascii;
2371 term.esc |= ESC_STR;
2372 break;
2373 case '(': /* set primary charset G0 */
2374 term.esc |= ESC_ALTCHARSET;
2375 break;
2376 case ')': /* set secondary charset G1 (IGNORED) */
2377 case '*': /* set tertiary charset G2 (IGNORED) */
2378 case '+': /* set quaternary charset G3 (IGNORED) */
2379 term.esc = 0;
2380 break;
2381 case 'D': /* IND -- Linefeed */
2382 if(term.c.y == term.bot) {
2383 tscrollup(term.top, 1);
2384 } else {
2385 tmoveto(term.c.x, term.c.y+1);
2386 }
2387 term.esc = 0;
2388 break;
2389 case 'E': /* NEL -- Next line */
2390 tnewline(1); /* always go to first col */
2391 term.esc = 0;
2392 break;
2393 case 'H': /* HTS -- Horizontal tab stop */
2394 term.tabs[term.c.x] = 1;
2395 term.esc = 0;
2396 break;
2397 case 'M': /* RI -- Reverse index */
2398 if(term.c.y == term.top) {
2399 tscrolldown(term.top, 1);
2400 } else {
2401 tmoveto(term.c.x, term.c.y-1);
2402 }
2403 term.esc = 0;
2404 break;
2405 case 'Z': /* DECID -- Identify Terminal */
2406 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2407 term.esc = 0;
2408 break;
2409 case 'c': /* RIS -- Reset to inital state */
2410 treset();
2411 term.esc = 0;
2412 xresettitle();
2413 break;
2414 case '=': /* DECPAM -- Application keypad */
2415 term.mode |= MODE_APPKEYPAD;
2416 term.esc = 0;
2417 break;
2418 case '>': /* DECPNM -- Normal keypad */
2419 term.mode &= ~MODE_APPKEYPAD;
2420 term.esc = 0;
2421 break;
2422 case '7': /* DECSC -- Save Cursor */
2423 tcursor(CURSOR_SAVE);
2424 term.esc = 0;
2425 break;
2426 case '8': /* DECRC -- Restore Cursor */
2427 tcursor(CURSOR_LOAD);
2428 term.esc = 0;
2429 break;
2430 case '\\': /* ST -- Stop */
2431 term.esc = 0;
2432 break;
2433 default:
2434 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2435 (uchar) ascii, isprint(ascii)? ascii:'.');
2436 term.esc = 0;
2437 }
2438 }
2439 /*
2440 * All characters which form part of a sequence are not
2441 * printed
2442 */
2443 return;
2444 }
2445 /*
2446 * Display control codes only if we are in graphic mode
2447 */
2448 if(control && !(term.c.attr.mode & ATTR_GFX))
2449 return;
2450 if(sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
2451 sel.ob.x = -1;
2452 if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2453 term.line[term.c.y][term.c.x].mode |= ATTR_WRAP;
2454 tnewline(1);
2455 }
2456
2457 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col) {
2458 memmove(&term.line[term.c.y][term.c.x+1],
2459 &term.line[term.c.y][term.c.x],
2460 (term.col - term.c.x - 1) * sizeof(Glyph));
2461 }
2462
2463 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2464 if(term.c.x+1 < term.col) {
2465 tmoveto(term.c.x+1, term.c.y);
2466 } else {
2467 term.c.state |= CURSOR_WRAPNEXT;
2468 }
2469 }
2470
2471 int
2472 tresize(int col, int row) {
2473 int i;
2474 int minrow = MIN(row, term.row);
2475 int mincol = MIN(col, term.col);
2476 int slide = term.c.y - row + 1;
2477 bool *bp;
2478 Line *orig;
2479
2480 if(col < 1 || row < 1)
2481 return 0;
2482
2483 /* free unneeded rows */
2484 i = 0;
2485 if(slide > 0) {
2486 /*
2487 * slide screen to keep cursor where we expect it -
2488 * tscrollup would work here, but we can optimize to
2489 * memmove because we're freeing the earlier lines
2490 */
2491 for(/* i = 0 */; i < slide; i++) {
2492 free(term.line[i]);
2493 free(term.alt[i]);
2494 }
2495 memmove(term.line, term.line + slide, row * sizeof(Line));
2496 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2497 }
2498 for(i += row; i < term.row; i++) {
2499 free(term.line[i]);
2500 free(term.alt[i]);
2501 }
2502
2503 /* resize to new height */
2504 term.line = xrealloc(term.line, row * sizeof(Line));
2505 term.alt = xrealloc(term.alt, row * sizeof(Line));
2506 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2507 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2508
2509 /* resize each row to new width, zero-pad if needed */
2510 for(i = 0; i < minrow; i++) {
2511 term.dirty[i] = 1;
2512 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2513 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2514 }
2515
2516 /* allocate any new rows */
2517 for(/* i == minrow */; i < row; i++) {
2518 term.dirty[i] = 1;
2519 term.line[i] = xcalloc(col, sizeof(Glyph));
2520 term.alt [i] = xcalloc(col, sizeof(Glyph));
2521 }
2522 if(col > term.col) {
2523 bp = term.tabs + term.col;
2524
2525 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2526 while(--bp > term.tabs && !*bp)
2527 /* nothing */ ;
2528 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2529 *bp = 1;
2530 }
2531 /* update terminal size */
2532 term.col = col;
2533 term.row = row;
2534 /* reset scrolling region */
2535 tsetscroll(0, row-1);
2536 /* make use of the LIMIT in tmoveto */
2537 tmoveto(term.c.x, term.c.y);
2538 /* Clearing both screens */
2539 orig = term.line;
2540 do {
2541 if(mincol < col && 0 < minrow) {
2542 tclearregion(mincol, 0, col - 1, minrow - 1);
2543 }
2544 if(0 < col && minrow < row) {
2545 tclearregion(0, minrow, col - 1, row - 1);
2546 }
2547 tswapscreen();
2548 } while(orig != term.line);
2549
2550 return (slide > 0);
2551 }
2552
2553 void
2554 xresize(int col, int row) {
2555 xw.tw = MAX(1, col * xw.cw);
2556 xw.th = MAX(1, row * xw.ch);
2557
2558 XFreePixmap(xw.dpy, xw.buf);
2559 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2560 DefaultDepth(xw.dpy, xw.scr));
2561 XftDrawChange(xw.draw, xw.buf);
2562 xclear(0, 0, xw.w, xw.h);
2563 }
2564
2565 static inline ushort
2566 sixd_to_16bit(int x) {
2567 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2568 }
2569
2570 void
2571 xloadcols(void) {
2572 int i, r, g, b;
2573 XRenderColor color = { .alpha = 0xffff };
2574
2575 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
2576 for(i = 0; i < LEN(colorname); i++) {
2577 if(!colorname[i])
2578 continue;
2579 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2580 die("Could not allocate color '%s'\n", colorname[i]);
2581 }
2582 }
2583
2584 /* load colors [16-255] ; same colors as xterm */
2585 for(i = 16, r = 0; r < 6; r++) {
2586 for(g = 0; g < 6; g++) {
2587 for(b = 0; b < 6; b++) {
2588 color.red = sixd_to_16bit(r);
2589 color.green = sixd_to_16bit(g);
2590 color.blue = sixd_to_16bit(b);
2591 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i])) {
2592 die("Could not allocate color %d\n", i);
2593 }
2594 i++;
2595 }
2596 }
2597 }
2598
2599 for(r = 0; r < 24; r++, i++) {
2600 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
2601 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color,
2602 &dc.col[i])) {
2603 die("Could not allocate color %d\n", i);
2604 }
2605 }
2606 }
2607
2608 int
2609 xsetcolorname(int x, const char *name) {
2610 XRenderColor color = { .alpha = 0xffff };
2611 Colour colour;
2612 if (x < 0 || x > LEN(colorname))
2613 return -1;
2614 if(!name) {
2615 if(16 <= x && x < 16 + 216) {
2616 int r = (x - 16) / 36, g = ((x - 16) % 36) / 6, b = (x - 16) % 6;
2617 color.red = sixd_to_16bit(r);
2618 color.green = sixd_to_16bit(g);
2619 color.blue = sixd_to_16bit(b);
2620 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2621 return 0; /* something went wrong */
2622 dc.col[x] = colour;
2623 return 1;
2624 } else if (16 + 216 <= x && x < 256) {
2625 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (x - (16 + 216));
2626 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2627 return 0; /* something went wrong */
2628 dc.col[x] = colour;
2629 return 1;
2630 } else {
2631 name = colorname[x];
2632 }
2633 }
2634 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &colour))
2635 return 0;
2636 dc.col[x] = colour;
2637 return 1;
2638 }
2639
2640 void
2641 xtermclear(int col1, int row1, int col2, int row2) {
2642 XftDrawRect(xw.draw,
2643 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2644 borderpx + col1 * xw.cw,
2645 borderpx + row1 * xw.ch,
2646 (col2-col1+1) * xw.cw,
2647 (row2-row1+1) * xw.ch);
2648 }
2649
2650 /*
2651 * Absolute coordinates.
2652 */
2653 void
2654 xclear(int x1, int y1, int x2, int y2) {
2655 XftDrawRect(xw.draw,
2656 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2657 x1, y1, x2-x1, y2-y1);
2658 }
2659
2660 void
2661 xhints(void) {
2662 XClassHint class = {opt_class ? opt_class : termname, termname};
2663 XWMHints wm = {.flags = InputHint, .input = 1};
2664 XSizeHints *sizeh = NULL;
2665
2666 sizeh = XAllocSizeHints();
2667 if(xw.isfixed == False) {
2668 sizeh->flags = PSize | PResizeInc | PBaseSize;
2669 sizeh->height = xw.h;
2670 sizeh->width = xw.w;
2671 sizeh->height_inc = xw.ch;
2672 sizeh->width_inc = xw.cw;
2673 sizeh->base_height = 2 * borderpx;
2674 sizeh->base_width = 2 * borderpx;
2675 } else {
2676 sizeh->flags = PMaxSize | PMinSize;
2677 sizeh->min_width = sizeh->max_width = xw.fw;
2678 sizeh->min_height = sizeh->max_height = xw.fh;
2679 }
2680
2681 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
2682 XFree(sizeh);
2683 }
2684
2685 int
2686 xloadfont(Font *f, FcPattern *pattern) {
2687 FcPattern *match;
2688 FcResult result;
2689
2690 match = FcFontMatch(NULL, pattern, &result);
2691 if(!match)
2692 return 1;
2693
2694 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2695 FcPatternDestroy(match);
2696 return 1;
2697 }
2698
2699 f->set = NULL;
2700 f->pattern = FcPatternDuplicate(pattern);
2701
2702 f->ascent = f->match->ascent;
2703 f->descent = f->match->descent;
2704 f->lbearing = 0;
2705 f->rbearing = f->match->max_advance_width;
2706
2707 f->height = f->ascent + f->descent;
2708 f->width = f->lbearing + f->rbearing;
2709
2710 return 0;
2711 }
2712
2713 void
2714 xloadfonts(char *fontstr, int fontsize) {
2715 FcPattern *pattern;
2716 FcResult result;
2717 double fontval;
2718
2719 if(fontstr[0] == '-') {
2720 pattern = XftXlfdParse(fontstr, False, False);
2721 } else {
2722 pattern = FcNameParse((FcChar8 *)fontstr);
2723 }
2724
2725 if(!pattern)
2726 die("st: can't open font %s\n", fontstr);
2727
2728 if(fontsize > 0) {
2729 FcPatternDel(pattern, FC_PIXEL_SIZE);
2730 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2731 usedfontsize = fontsize;
2732 } else {
2733 result = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2734 if(result == FcResultMatch) {
2735 usedfontsize = (int)fontval;
2736 } else {
2737 /*
2738 * Default font size is 12, if none given. This is to
2739 * have a known usedfontsize value.
2740 */
2741 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
2742 usedfontsize = 12;
2743 }
2744 }
2745
2746 FcConfigSubstitute(0, pattern, FcMatchPattern);
2747 FcDefaultSubstitute(pattern);
2748
2749 if(xloadfont(&dc.font, pattern))
2750 die("st: can't open font %s\n", fontstr);
2751
2752 /* Setting character width and height. */
2753 xw.cw = dc.font.width;
2754 xw.ch = dc.font.height;
2755
2756 FcPatternDel(pattern, FC_SLANT);
2757 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
2758 if(xloadfont(&dc.ifont, pattern))
2759 die("st: can't open font %s\n", fontstr);
2760
2761 FcPatternDel(pattern, FC_WEIGHT);
2762 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
2763 if(xloadfont(&dc.ibfont, pattern))
2764 die("st: can't open font %s\n", fontstr);
2765
2766 FcPatternDel(pattern, FC_SLANT);
2767 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
2768 if(xloadfont(&dc.bfont, pattern))
2769 die("st: can't open font %s\n", fontstr);
2770
2771 FcPatternDestroy(pattern);
2772 }
2773
2774 int
2775 xloadfontset(Font *f) {
2776 FcResult result;
2777
2778 if(!(f->set = FcFontSort(0, f->pattern, FcTrue, 0, &result)))
2779 return 1;
2780 return 0;
2781 }
2782
2783 void
2784 xunloadfont(Font *f) {
2785 XftFontClose(xw.dpy, f->match);
2786 FcPatternDestroy(f->pattern);
2787 if(f->set)
2788 FcFontSetDestroy(f->set);
2789 }
2790
2791 void
2792 xunloadfonts(void) {
2793 int i, ip;
2794
2795 /*
2796 * Free the loaded fonts in the font cache. This is done backwards
2797 * from the frccur.
2798 */
2799 for(i = 0, ip = frccur; i < frclen; i++, ip--) {
2800 if(ip < 0)
2801 ip = LEN(frc) - 1;
2802 XftFontClose(xw.dpy, frc[ip].font);
2803 }
2804 frccur = -1;
2805 frclen = 0;
2806
2807 xunloadfont(&dc.font);
2808 xunloadfont(&dc.bfont);
2809 xunloadfont(&dc.ifont);
2810 xunloadfont(&dc.ibfont);
2811 }
2812
2813 void
2814 xzoom(const Arg *arg) {
2815 xunloadfonts();
2816 xloadfonts(usedfont, usedfontsize + arg->i);
2817 cresize(0, 0);
2818 redraw(0);
2819 }
2820
2821 void
2822 xinit(void) {
2823 XGCValues gcvalues;
2824 Cursor cursor;
2825 Window parent;
2826 int sw, sh;
2827
2828 if(!(xw.dpy = XOpenDisplay(NULL)))
2829 die("Can't open display\n");
2830 xw.scr = XDefaultScreen(xw.dpy);
2831 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
2832
2833 /* font */
2834 if(!FcInit())
2835 die("Could not init fontconfig.\n");
2836
2837 usedfont = (opt_font == NULL)? font : opt_font;
2838 xloadfonts(usedfont, 0);
2839
2840 /* colors */
2841 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
2842 xloadcols();
2843
2844 /* adjust fixed window geometry */
2845 if(xw.isfixed) {
2846 sw = DisplayWidth(xw.dpy, xw.scr);
2847 sh = DisplayHeight(xw.dpy, xw.scr);
2848 if(xw.fx < 0)
2849 xw.fx = sw + xw.fx - xw.fw - 1;
2850 if(xw.fy < 0)
2851 xw.fy = sh + xw.fy - xw.fh - 1;
2852
2853 xw.h = xw.fh;
2854 xw.w = xw.fw;
2855 } else {
2856 /* window - default size */
2857 xw.h = 2 * borderpx + term.row * xw.ch;
2858 xw.w = 2 * borderpx + term.col * xw.cw;
2859 xw.fx = 0;
2860 xw.fy = 0;
2861 }
2862
2863 /* Events */
2864 xw.attrs.background_pixel = dc.col[defaultbg].pixel;
2865 xw.attrs.border_pixel = dc.col[defaultbg].pixel;
2866 xw.attrs.bit_gravity = NorthWestGravity;
2867 xw.attrs.event_mask = FocusChangeMask | KeyPressMask
2868 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
2869 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
2870 xw.attrs.colormap = xw.cmap;
2871
2872 parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
2873 XRootWindow(xw.dpy, xw.scr);
2874 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
2875 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
2876 xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
2877 | CWEventMask | CWColormap, &xw.attrs);
2878
2879 memset(&gcvalues, 0, sizeof(gcvalues));
2880 gcvalues.graphics_exposures = False;
2881 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
2882 &gcvalues);
2883 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2884 DefaultDepth(xw.dpy, xw.scr));
2885 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
2886 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
2887
2888 /* Xft rendering context */
2889 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
2890
2891 /* input methods */
2892 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2893 XSetLocaleModifiers("@im=local");
2894 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2895 XSetLocaleModifiers("@im=");
2896 if((xw.xim = XOpenIM(xw.dpy,
2897 NULL, NULL, NULL)) == NULL) {
2898 die("XOpenIM failed. Could not open input"
2899 " device.\n");
2900 }
2901 }
2902 }
2903 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
2904 | XIMStatusNothing, XNClientWindow, xw.win,
2905 XNFocusWindow, xw.win, NULL);
2906 if(xw.xic == NULL)
2907 die("XCreateIC failed. Could not obtain input method.\n");
2908
2909 /* white cursor, black outline */
2910 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
2911 XDefineCursor(xw.dpy, xw.win, cursor);
2912 XRecolorCursor(xw.dpy, cursor,
2913 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
2914 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
2915
2916 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
2917 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
2918 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
2919
2920 xresettitle();
2921 XMapWindow(xw.dpy, xw.win);
2922 xhints();
2923 XSync(xw.dpy, 0);
2924 }
2925
2926 void
2927 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
2928 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
2929 width = charlen * xw.cw, xp, i;
2930 int frp, frcflags;
2931 int u8fl, u8fblen, u8cblen, doesexist;
2932 char *u8c, *u8fs;
2933 long u8char;
2934 Font *font = &dc.font;
2935 FcResult fcres;
2936 FcPattern *fcpattern, *fontpattern;
2937 FcFontSet *fcsets[] = { NULL };
2938 FcCharSet *fccharset;
2939 Colour *fg, *bg, *temp, revfg, revbg;
2940 XRenderColor colfg, colbg;
2941 Rectangle r;
2942
2943 frcflags = FRC_NORMAL;
2944
2945 if(base.mode & ATTR_ITALIC) {
2946 if(base.fg == defaultfg)
2947 base.fg = defaultitalic;
2948 font = &dc.ifont;
2949 frcflags = FRC_ITALIC;
2950 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
2951 if(base.fg == defaultfg)
2952 base.fg = defaultitalic;
2953 font = &dc.ibfont;
2954 frcflags = FRC_ITALICBOLD;
2955 } else if(base.mode & ATTR_UNDERLINE) {
2956 if(base.fg == defaultfg)
2957 base.fg = defaultunderline;
2958 }
2959 fg = &dc.col[base.fg];
2960 bg = &dc.col[base.bg];
2961
2962 if(base.mode & ATTR_BOLD) {
2963 if(BETWEEN(base.fg, 0, 7)) {
2964 /* basic system colors */
2965 fg = &dc.col[base.fg + 8];
2966 } else if(BETWEEN(base.fg, 16, 195)) {
2967 /* 256 colors */
2968 fg = &dc.col[base.fg + 36];
2969 } else if(BETWEEN(base.fg, 232, 251)) {
2970 /* greyscale */
2971 fg = &dc.col[base.fg + 4];
2972 }
2973 /*
2974 * Those ranges will not be brightened:
2975 * 8 - 15 – bright system colors
2976 * 196 - 231 – highest 256 color cube
2977 * 252 - 255 – brightest colors in greyscale
2978 */
2979 font = &dc.bfont;
2980 frcflags = FRC_BOLD;
2981 }
2982
2983 if(IS_SET(MODE_REVERSE)) {
2984 if(fg == &dc.col[defaultfg]) {
2985 fg = &dc.col[defaultbg];
2986 } else {
2987 colfg.red = ~fg->color.red;
2988 colfg.green = ~fg->color.green;
2989 colfg.blue = ~fg->color.blue;
2990 colfg.alpha = fg->color.alpha;
2991 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
2992 fg = &revfg;
2993 }
2994
2995 if(bg == &dc.col[defaultbg]) {
2996 bg = &dc.col[defaultfg];
2997 } else {
2998 colbg.red = ~bg->color.red;
2999 colbg.green = ~bg->color.green;
3000 colbg.blue = ~bg->color.blue;
3001 colbg.alpha = bg->color.alpha;
3002 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &revbg);
3003 bg = &revbg;
3004 }
3005 }
3006
3007 if(base.mode & ATTR_REVERSE) {
3008 temp = fg;
3009 fg = bg;
3010 bg = temp;
3011 }
3012
3013 if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
3014 fg = bg;
3015
3016 /* Intelligent cleaning up of the borders. */
3017 if(x == 0) {
3018 xclear(0, (y == 0)? 0 : winy, borderpx,
3019 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
3020 }
3021 if(x + charlen >= term.col) {
3022 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
3023 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
3024 }
3025 if(y == 0)
3026 xclear(winx, 0, winx + width, borderpx);
3027 if(y == term.row-1)
3028 xclear(winx, winy + xw.ch, winx + width, xw.h);
3029
3030 /* Clean up the region we want to draw to. */
3031 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
3032
3033 /* Set the clip region because Xft is sometimes dirty. */
3034 r.x = 0;
3035 r.y = 0;
3036 r.height = xw.ch;
3037 r.width = width;
3038 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
3039
3040 for(xp = winx; bytelen > 0;) {
3041 /*
3042 * Search for the range in the to be printed string of glyphs
3043 * that are in the main font. Then print that range. If
3044 * some glyph is found that is not in the font, do the
3045 * fallback dance.
3046 */
3047 u8fs = s;
3048 u8fblen = 0;
3049 u8fl = 0;
3050 for(;;) {
3051 u8c = s;
3052 u8cblen = utf8decode(s, &u8char);
3053 s += u8cblen;
3054 bytelen -= u8cblen;
3055
3056 doesexist = XftCharIndex(xw.dpy, font->match, u8char);
3057 if(!doesexist || bytelen <= 0) {
3058 if(bytelen <= 0) {
3059 if(doesexist) {
3060 u8fl++;
3061 u8fblen += u8cblen;
3062 }
3063 }
3064
3065 if(u8fl > 0) {
3066 XftDrawStringUtf8(xw.draw, fg,
3067 font->match, xp,
3068 winy + font->ascent,
3069 (FcChar8 *)u8fs,
3070 u8fblen);
3071 xp += font->width * u8fl;
3072
3073 }
3074 break;
3075 }
3076
3077 u8fl++;
3078 u8fblen += u8cblen;
3079 }
3080 if(doesexist)
3081 break;
3082
3083 frp = frccur;
3084 /* Search the font cache. */
3085 for(i = 0; i < frclen; i++, frp--) {
3086 if(frp <= 0)
3087 frp = LEN(frc) - 1;
3088
3089 if(frc[frp].c == u8char
3090 && frc[frp].flags == frcflags) {
3091 break;
3092 }
3093 }
3094
3095 /* Nothing was found. */
3096 if(i >= frclen) {
3097 if(!font->set)
3098 xloadfontset(font);
3099 fcsets[0] = font->set;
3100
3101 /*
3102 * Nothing was found in the cache. Now use
3103 * some dozen of Fontconfig calls to get the
3104 * font for one single character.
3105 */
3106 fcpattern = FcPatternDuplicate(font->pattern);
3107 fccharset = FcCharSetCreate();
3108
3109 FcCharSetAddChar(fccharset, u8char);
3110 FcPatternAddCharSet(fcpattern, FC_CHARSET,
3111 fccharset);
3112 FcPatternAddBool(fcpattern, FC_SCALABLE,
3113 FcTrue);
3114
3115 FcConfigSubstitute(0, fcpattern,
3116 FcMatchPattern);
3117 FcDefaultSubstitute(fcpattern);
3118
3119 fontpattern = FcFontSetMatch(0, fcsets,
3120 FcTrue, fcpattern, &fcres);
3121
3122 /*
3123 * Overwrite or create the new cache entry.
3124 */
3125 frccur++;
3126 frclen++;
3127 if(frccur >= LEN(frc))
3128 frccur = 0;
3129 if(frclen > LEN(frc)) {
3130 frclen = LEN(frc);
3131 XftFontClose(xw.dpy, frc[frccur].font);
3132 }
3133
3134 frc[frccur].font = XftFontOpenPattern(xw.dpy,
3135 fontpattern);
3136 frc[frccur].c = u8char;
3137 frc[frccur].flags = frcflags;
3138
3139 FcPatternDestroy(fcpattern);
3140 FcCharSetDestroy(fccharset);
3141
3142 frp = frccur;
3143 }
3144
3145 XftDrawStringUtf8(xw.draw, fg, frc[frp].font,
3146 xp, winy + frc[frp].font->ascent,
3147 (FcChar8 *)u8c, u8cblen);
3148
3149 xp += font->width;
3150 }
3151
3152 /*
3153 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
3154 winy + font->ascent, (FcChar8 *)s, bytelen);
3155 */
3156
3157 if(base.mode & ATTR_UNDERLINE) {
3158 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
3159 width, 1);
3160 }
3161
3162 /* Reset clip to none. */
3163 XftDrawSetClip(xw.draw, 0);
3164 }
3165
3166 void
3167 xdrawcursor(void) {
3168 static int oldx = 0, oldy = 0;
3169 int sl;
3170 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
3171
3172 LIMIT(oldx, 0, term.col-1);
3173 LIMIT(oldy, 0, term.row-1);
3174
3175 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
3176
3177 /* remove the old cursor */
3178 sl = utf8size(term.line[oldy][oldx].c);
3179 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
3180 oldy, 1, sl);
3181
3182 /* draw the new one */
3183 if(!(IS_SET(MODE_HIDE))) {
3184 if(xw.state & WIN_FOCUSED) {
3185 if(IS_SET(MODE_REVERSE)) {
3186 g.mode |= ATTR_REVERSE;
3187 g.fg = defaultcs;
3188 g.bg = defaultfg;
3189 }
3190
3191 sl = utf8size(g.c);
3192 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
3193 } else {
3194 XftDrawRect(xw.draw, &dc.col[defaultcs],
3195 borderpx + term.c.x * xw.cw,
3196 borderpx + term.c.y * xw.ch,
3197 xw.cw - 1, 1);
3198 XftDrawRect(xw.draw, &dc.col[defaultcs],
3199 borderpx + term.c.x * xw.cw,
3200 borderpx + term.c.y * xw.ch,
3201 1, xw.ch - 1);
3202 XftDrawRect(xw.draw, &dc.col[defaultcs],
3203 borderpx + (term.c.x + 1) * xw.cw - 1,
3204 borderpx + term.c.y * xw.ch,
3205 1, xw.ch - 1);
3206 XftDrawRect(xw.draw, &dc.col[defaultcs],
3207 borderpx + term.c.x * xw.cw,
3208 borderpx + (term.c.y + 1) * xw.ch - 1,
3209 xw.cw, 1);
3210 }
3211 oldx = term.c.x, oldy = term.c.y;
3212 }
3213 }
3214
3215
3216 void
3217 xsettitle(char *p) {
3218 XTextProperty prop;
3219
3220 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3221 &prop);
3222 XSetWMName(xw.dpy, xw.win, &prop);
3223 }
3224
3225 void
3226 xresettitle(void) {
3227 xsettitle(opt_title ? opt_title : "st");
3228 }
3229
3230 void
3231 redraw(int timeout) {
3232 struct timespec tv = {0, timeout * 1000};
3233
3234 tfulldirt();
3235 draw();
3236
3237 if(timeout > 0) {
3238 nanosleep(&tv, NULL);
3239 XSync(xw.dpy, False); /* necessary for a good tput flash */
3240 }
3241 }
3242
3243 void
3244 draw(void) {
3245 drawregion(0, 0, term.col, term.row);
3246 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3247 xw.h, 0, 0);
3248 XSetForeground(xw.dpy, dc.gc,
3249 dc.col[IS_SET(MODE_REVERSE)?
3250 defaultfg : defaultbg].pixel);
3251 }
3252
3253 void
3254 drawregion(int x1, int y1, int x2, int y2) {
3255 int ic, ib, x, y, ox, sl;
3256 Glyph base, new;
3257 char buf[DRAW_BUF_SIZ];
3258 bool ena_sel = sel.ob.x != -1;
3259
3260 if(sel.alt ^ IS_SET(MODE_ALTSCREEN))
3261 ena_sel = 0;
3262
3263 if(!(xw.state & WIN_VISIBLE))
3264 return;
3265
3266 for(y = y1; y < y2; y++) {
3267 if(!term.dirty[y])
3268 continue;
3269
3270 xtermclear(0, y, term.col, y);
3271 term.dirty[y] = 0;
3272 base = term.line[y][0];
3273 ic = ib = ox = 0;
3274 for(x = x1; x < x2; x++) {
3275 new = term.line[y][x];
3276 if(ena_sel && selected(x, y))
3277 new.mode ^= ATTR_REVERSE;
3278 if(ib > 0 && (ATTRCMP(base, new)
3279 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3280 xdraws(buf, base, ox, y, ic, ib);
3281 ic = ib = 0;
3282 }
3283 if(ib == 0) {
3284 ox = x;
3285 base = new;
3286 }
3287
3288 sl = utf8size(new.c);
3289 memcpy(buf+ib, new.c, sl);
3290 ib += sl;
3291 ++ic;
3292 }
3293 if(ib > 0)
3294 xdraws(buf, base, ox, y, ic, ib);
3295 }
3296 xdrawcursor();
3297 }
3298
3299 void
3300 expose(XEvent *ev) {
3301 XExposeEvent *e = &ev->xexpose;
3302
3303 if(xw.state & WIN_REDRAW) {
3304 if(!e->count)
3305 xw.state &= ~WIN_REDRAW;
3306 }
3307 redraw(0);
3308 }
3309
3310 void
3311 visibility(XEvent *ev) {
3312 XVisibilityEvent *e = &ev->xvisibility;
3313
3314 if(e->state == VisibilityFullyObscured) {
3315 xw.state &= ~WIN_VISIBLE;
3316 } else if(!(xw.state & WIN_VISIBLE)) {
3317 /* need a full redraw for next Expose, not just a buf copy */
3318 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3319 }
3320 }
3321
3322 void
3323 unmap(XEvent *ev) {
3324 xw.state &= ~WIN_VISIBLE;
3325 }
3326
3327 void
3328 xsetpointermotion(int set) {
3329 MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
3330 XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
3331 }
3332
3333 void
3334 xseturgency(int add) {
3335 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3336
3337 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
3338 XSetWMHints(xw.dpy, xw.win, h);
3339 XFree(h);
3340 }
3341
3342 void
3343 focus(XEvent *ev) {
3344 XFocusChangeEvent *e = &ev->xfocus;
3345
3346 if(e->mode == NotifyGrab)
3347 return;
3348
3349 if(ev->type == FocusIn) {
3350 XSetICFocus(xw.xic);
3351 xw.state |= WIN_FOCUSED;
3352 xseturgency(0);
3353 if(IS_SET(MODE_FOCUS))
3354 ttywrite("\033[I", 3);
3355 } else {
3356 XUnsetICFocus(xw.xic);
3357 xw.state &= ~WIN_FOCUSED;
3358 if(IS_SET(MODE_FOCUS))
3359 ttywrite("\033[O", 3);
3360 }
3361 }
3362
3363 inline bool
3364 match(uint mask, uint state) {
3365 state &= ~(ignoremod);
3366
3367 if(mask == XK_NO_MOD && state)
3368 return false;
3369 if(mask != XK_ANY_MOD && mask != XK_NO_MOD && !state)
3370 return false;
3371 if((state & mask) != state)
3372 return false;
3373 return true;
3374 }
3375
3376 void
3377 numlock(const Arg *dummy) {
3378 term.numlock ^= 1;
3379 }
3380
3381 char*
3382 kmap(KeySym k, uint state) {
3383 uint mask;
3384 Key *kp;
3385 int i;
3386
3387 /* Check for mapped keys out of X11 function keys. */
3388 for(i = 0; i < LEN(mappedkeys); i++) {
3389 if(mappedkeys[i] == k)
3390 break;
3391 }
3392 if(i == LEN(mappedkeys)) {
3393 if((k & 0xFFFF) < 0xFD00)
3394 return NULL;
3395 }
3396
3397 for(kp = key; kp < key + LEN(key); kp++) {
3398 mask = kp->mask;
3399
3400 if(kp->k != k)
3401 continue;
3402
3403 if(!match(mask, state))
3404 continue;
3405
3406 if(kp->appkey > 0) {
3407 if(!IS_SET(MODE_APPKEYPAD))
3408 continue;
3409 if(term.numlock && kp->appkey == 2)
3410 continue;
3411 } else if(kp->appkey < 0 && IS_SET(MODE_APPKEYPAD)) {
3412 continue;
3413 }
3414
3415 if((kp->appcursor < 0 && IS_SET(MODE_APPCURSOR)) ||
3416 (kp->appcursor > 0
3417 && !IS_SET(MODE_APPCURSOR))) {
3418 continue;
3419 }
3420
3421 if((kp->crlf < 0 && IS_SET(MODE_CRLF)) ||
3422 (kp->crlf > 0 && !IS_SET(MODE_CRLF))) {
3423 continue;
3424 }
3425
3426 return kp->s;
3427 }
3428
3429 return NULL;
3430 }
3431
3432 void
3433 kpress(XEvent *ev) {
3434 XKeyEvent *e = &ev->xkey;
3435 KeySym ksym;
3436 char xstr[31], buf[32], *customkey, *cp = buf;
3437 int len, ret;
3438 long c;
3439 Status status;
3440 Shortcut *bp;
3441
3442 if(IS_SET(MODE_KBDLOCK))
3443 return;
3444
3445 len = XmbLookupString(xw.xic, e, xstr, sizeof(xstr), &ksym, &status);
3446 e->state &= ~Mod2Mask;
3447 /* 1. shortcuts */
3448 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3449 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3450 bp->func(&(bp->arg));
3451 return;
3452 }
3453 }
3454
3455 /* 2. custom keys from config.h */
3456 if((customkey = kmap(ksym, e->state))) {
3457 len = strlen(customkey);
3458 memcpy(buf, customkey, len);
3459 /* 3. hardcoded (overrides X lookup) */
3460 } else {
3461 if(len == 0)
3462 return;
3463
3464 if(len == 1 && e->state & Mod1Mask) {
3465 if(IS_SET(MODE_8BIT)) {
3466 if(*xstr < 0177) {
3467 c = *xstr | B7;
3468 ret = utf8encode(&c, cp);
3469 cp += ret;
3470 len = 0;
3471 }
3472 } else {
3473 *cp++ = '\033';
3474 }
3475 }
3476
3477 memcpy(cp, xstr, len);
3478 len = cp - buf + len;
3479 }
3480
3481 ttywrite(buf, len);
3482 if(IS_SET(MODE_ECHO))
3483 techo(buf, len);
3484 }
3485
3486
3487 void
3488 cmessage(XEvent *e) {
3489 /*
3490 * See xembed specs
3491 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3492 */
3493 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3494 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3495 xw.state |= WIN_FOCUSED;
3496 xseturgency(0);
3497 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3498 xw.state &= ~WIN_FOCUSED;
3499 }
3500 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3501 /* Send SIGHUP to shell */
3502 kill(pid, SIGHUP);
3503 exit(EXIT_SUCCESS);
3504 }
3505 }
3506
3507 void
3508 cresize(int width, int height) {
3509 int col, row;
3510
3511 if(width != 0)
3512 xw.w = width;
3513 if(height != 0)
3514 xw.h = height;
3515
3516 col = (xw.w - 2 * borderpx) / xw.cw;
3517 row = (xw.h - 2 * borderpx) / xw.ch;
3518
3519 tresize(col, row);
3520 xresize(col, row);
3521 ttyresize();
3522 }
3523
3524 void
3525 resize(XEvent *e) {
3526 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3527 return;
3528
3529 cresize(e->xconfigure.width, e->xconfigure.height);
3530 }
3531
3532 void
3533 run(void) {
3534 XEvent ev;
3535 fd_set rfd;
3536 int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3537 struct timeval drawtimeout, *tv = NULL, now, last, lastblink;
3538
3539 gettimeofday(&lastblink, NULL);
3540 gettimeofday(&last, NULL);
3541
3542 for(xev = actionfps;;) {
3543 FD_ZERO(&rfd);
3544 FD_SET(cmdfd, &rfd);
3545 FD_SET(xfd, &rfd);
3546
3547 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
3548 if(errno == EINTR)
3549 continue;
3550 die("select failed: %s\n", SERRNO);
3551 }
3552 if(FD_ISSET(cmdfd, &rfd)) {
3553 ttyread();
3554 if(blinktimeout) {
3555 blinkset = tattrset(ATTR_BLINK);
3556 if(!blinkset && term.mode & ATTR_BLINK)
3557 term.mode &= ~(MODE_BLINK);
3558 }
3559 }
3560
3561 if(FD_ISSET(xfd, &rfd))
3562 xev = actionfps;
3563
3564 gettimeofday(&now, NULL);
3565 drawtimeout.tv_sec = 0;
3566 drawtimeout.tv_usec = (1000/xfps) * 1000;
3567 tv = &drawtimeout;
3568
3569 dodraw = 0;
3570 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
3571 tsetdirtattr(ATTR_BLINK);
3572 term.mode ^= MODE_BLINK;
3573 gettimeofday(&lastblink, NULL);
3574 dodraw = 1;
3575 }
3576 if(TIMEDIFF(now, last) \
3577 > (xev? (1000/xfps) : (1000/actionfps))) {
3578 dodraw = 1;
3579 last = now;
3580 }
3581
3582 if(dodraw) {
3583 while(XPending(xw.dpy)) {
3584 XNextEvent(xw.dpy, &ev);
3585 if(XFilterEvent(&ev, None))
3586 continue;
3587 if(handler[ev.type])
3588 (handler[ev.type])(&ev);
3589 }
3590
3591 draw();
3592 XFlush(xw.dpy);
3593
3594 if(xev && !FD_ISSET(xfd, &rfd))
3595 xev--;
3596 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
3597 if(blinkset) {
3598 if(TIMEDIFF(now, lastblink) \
3599 > blinktimeout) {
3600 drawtimeout.tv_usec = 1;
3601 } else {
3602 drawtimeout.tv_usec = (1000 * \
3603 (blinktimeout - \
3604 TIMEDIFF(now,
3605 lastblink)));
3606 }
3607 } else {
3608 tv = NULL;
3609 }
3610 }
3611 }
3612 }
3613 }
3614
3615 void
3616 usage(void) {
3617 die("%s " VERSION " (c) 2010-2013 st engineers\n" \
3618 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]" \
3619 " [-t title] [-w windowid] [-e command ...]\n", argv0);
3620 }
3621
3622 int
3623 main(int argc, char *argv[]) {
3624 int bitm, xr, yr;
3625 uint wr, hr;
3626 char *titles;
3627
3628 xw.fw = xw.fh = xw.fx = xw.fy = 0;
3629 xw.isfixed = False;
3630
3631 ARGBEGIN {
3632 case 'a':
3633 allowaltscreen = false;
3634 break;
3635 case 'c':
3636 opt_class = EARGF(usage());
3637 break;
3638 case 'e':
3639 /* eat all remaining arguments */
3640 if(argc > 1) {
3641 opt_cmd = &argv[1];
3642 if(argv[1] != NULL && opt_title == NULL) {
3643 titles = strdup(argv[1]);
3644 opt_title = basename(titles);
3645 }
3646 }
3647 goto run;
3648 case 'f':
3649 opt_font = EARGF(usage());
3650 break;
3651 case 'g':
3652 bitm = XParseGeometry(EARGF(usage()), &xr, &yr, &wr, &hr);
3653 if(bitm & XValue)
3654 xw.fx = xr;
3655 if(bitm & YValue)
3656 xw.fy = yr;
3657 if(bitm & WidthValue)
3658 xw.fw = (int)wr;
3659 if(bitm & HeightValue)
3660 xw.fh = (int)hr;
3661 if(bitm & XNegative && xw.fx == 0)
3662 xw.fx = -1;
3663 if(bitm & XNegative && xw.fy == 0)
3664 xw.fy = -1;
3665
3666 if(xw.fh != 0 && xw.fw != 0)
3667 xw.isfixed = True;
3668 break;
3669 case 'o':
3670 opt_io = EARGF(usage());
3671 break;
3672 case 't':
3673 opt_title = EARGF(usage());
3674 break;
3675 case 'w':
3676 opt_embed = EARGF(usage());
3677 break;
3678 case 'v':
3679 default:
3680 usage();
3681 } ARGEND;
3682
3683 run:
3684 setlocale(LC_CTYPE, "");
3685 XSetLocaleModifiers("");
3686 tnew(80, 24);
3687 xinit();
3688 ttynew();
3689 selinit();
3690 if(xw.isfixed)
3691 cresize(xw.h, xw.w);
3692 run();
3693
3694 return 0;
3695 }
3696