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Adding true mouse motion support.
[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 <X11/Xatom.h>
23 #include <X11/Xlib.h>
24 #include <X11/Xutil.h>
25 #include <X11/cursorfont.h>
26 #include <X11/keysym.h>
27 #include <X11/Xft/Xft.h>
28 #include <fontconfig/fontconfig.h>
29
30 #include "arg.h"
31
32 char *argv0;
33
34 #define Glyph Glyph_
35 #define Font Font_
36 #define Draw XftDraw *
37 #define Colour XftColor
38 #define Colourmap Colormap
39 #define Rectangle XRectangle
40
41 #if defined(__linux)
42 #include <pty.h>
43 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
44 #include <util.h>
45 #elif defined(__FreeBSD__) || defined(__DragonFly__)
46 #include <libutil.h>
47 #endif
48
49
50 /* XEMBED messages */
51 #define XEMBED_FOCUS_IN 4
52 #define XEMBED_FOCUS_OUT 5
53
54 /* Arbitrary sizes */
55 #define UTF_SIZ 4
56 #define ESC_BUF_SIZ (128*UTF_SIZ)
57 #define ESC_ARG_SIZ 16
58 #define STR_BUF_SIZ ESC_BUF_SIZ
59 #define STR_ARG_SIZ ESC_ARG_SIZ
60 #define DRAW_BUF_SIZ 20*1024
61 #define XK_ANY_MOD UINT_MAX
62 #define XK_NO_MOD 0
63 #define XK_SWITCH_MOD (1<<13)
64
65 #define REDRAW_TIMEOUT (80*1000) /* 80 ms */
66
67 /* macros */
68 #define SERRNO strerror(errno)
69 #define MIN(a, b) ((a) < (b) ? (a) : (b))
70 #define MAX(a, b) ((a) < (b) ? (b) : (a))
71 #define LEN(a) (sizeof(a) / sizeof(a[0]))
72 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
73 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
74 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
75 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
76 #define IS_SET(flag) ((term.mode & (flag)) != 0)
77 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_usec-t2.tv_usec)/1000)
78
79 #define VT102ID "\033[?6c"
80
81 enum glyph_attribute {
82 ATTR_NULL = 0,
83 ATTR_REVERSE = 1,
84 ATTR_UNDERLINE = 2,
85 ATTR_BOLD = 4,
86 ATTR_GFX = 8,
87 ATTR_ITALIC = 16,
88 ATTR_BLINK = 32,
89 ATTR_WRAP = 64,
90 };
91
92 enum cursor_movement {
93 CURSOR_SAVE,
94 CURSOR_LOAD
95 };
96
97 enum cursor_state {
98 CURSOR_DEFAULT = 0,
99 CURSOR_WRAPNEXT = 1,
100 CURSOR_ORIGIN = 2
101 };
102
103 enum term_mode {
104 MODE_WRAP = 1,
105 MODE_INSERT = 2,
106 MODE_APPKEYPAD = 4,
107 MODE_ALTSCREEN = 8,
108 MODE_CRLF = 16,
109 MODE_MOUSEBTN = 32,
110 MODE_MOUSEMOTION = 64,
111 MODE_REVERSE = 128,
112 MODE_KBDLOCK = 256,
113 MODE_HIDE = 512,
114 MODE_ECHO = 1024,
115 MODE_APPCURSOR = 2048,
116 MODE_MOUSESGR = 4096,
117 MODE_8BIT = 8192,
118 MODE_BLINK = 16384,
119 MODE_FBLINK = 32768,
120 MODE_FOCUS = 65536,
121 MODE_MOUSEX10 = 131072,
122 MODE_MOUSEMANY = 262144,
123 MODE_MOUSE = MODE_MOUSEBTN|MODE_MOUSEMOTION|MODE_MOUSEX10\
124 |MODE_MOUSEMANY,
125 };
126
127 enum escape_state {
128 ESC_START = 1,
129 ESC_CSI = 2,
130 ESC_STR = 4, /* DSC, OSC, PM, APC */
131 ESC_ALTCHARSET = 8,
132 ESC_STR_END = 16, /* a final string was encountered */
133 ESC_TEST = 32, /* Enter in test mode */
134 };
135
136 enum window_state {
137 WIN_VISIBLE = 1,
138 WIN_REDRAW = 2,
139 WIN_FOCUSED = 4
140 };
141
142 enum selection_type {
143 SEL_REGULAR = 1,
144 SEL_RECTANGULAR = 2
145 };
146
147 enum selection_snap {
148 SNAP_WORD = 1,
149 SNAP_LINE = 2
150 };
151
152 /* bit macro */
153 #undef B0
154 enum { B0=1, B1=2, B2=4, B3=8, B4=16, B5=32, B6=64, B7=128 };
155
156 typedef unsigned char uchar;
157 typedef unsigned int uint;
158 typedef unsigned long ulong;
159 typedef unsigned short ushort;
160
161 typedef struct {
162 char c[UTF_SIZ]; /* character code */
163 uchar mode; /* attribute flags */
164 ushort fg; /* foreground */
165 ushort bg; /* background */
166 } Glyph;
167
168 typedef Glyph *Line;
169
170 typedef struct {
171 Glyph attr; /* current char attributes */
172 int x;
173 int y;
174 char state;
175 } TCursor;
176
177 /* CSI Escape sequence structs */
178 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
179 typedef struct {
180 char buf[ESC_BUF_SIZ]; /* raw string */
181 int len; /* raw string length */
182 char priv;
183 int arg[ESC_ARG_SIZ];
184 int narg; /* nb of args */
185 char mode;
186 } CSIEscape;
187
188 /* STR Escape sequence structs */
189 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
190 typedef struct {
191 char type; /* ESC type ... */
192 char buf[STR_BUF_SIZ]; /* raw string */
193 int len; /* raw string length */
194 char *args[STR_ARG_SIZ];
195 int narg; /* nb of args */
196 } STREscape;
197
198 /* Internal representation of the screen */
199 typedef struct {
200 int row; /* nb row */
201 int col; /* nb col */
202 Line *line; /* screen */
203 Line *alt; /* alternate screen */
204 bool *dirty; /* dirtyness of lines */
205 TCursor c; /* cursor */
206 int top; /* top scroll limit */
207 int bot; /* bottom scroll limit */
208 int mode; /* terminal mode flags */
209 int esc; /* escape state flags */
210 bool numlock; /* lock numbers in keyboard */
211 bool *tabs;
212 } Term;
213
214 /* Purely graphic info */
215 typedef struct {
216 Display *dpy;
217 Colourmap cmap;
218 Window win;
219 Drawable buf;
220 Atom xembed, wmdeletewin;
221 XIM xim;
222 XIC xic;
223 Draw draw;
224 Visual *vis;
225 XSetWindowAttributes attrs;
226 int scr;
227 bool isfixed; /* is fixed geometry? */
228 int fx, fy, fw, fh; /* fixed geometry */
229 int tw, th; /* tty width and height */
230 int w, h; /* window width and height */
231 int ch; /* char height */
232 int cw; /* char width */
233 char state; /* focus, redraw, visible */
234 } XWindow;
235
236 typedef struct {
237 int b;
238 uint mask;
239 char s[ESC_BUF_SIZ];
240 } Mousekey;
241
242 typedef struct {
243 KeySym k;
244 uint mask;
245 char s[ESC_BUF_SIZ];
246 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
247 signed char appkey; /* application keypad */
248 signed char appcursor; /* application cursor */
249 signed char crlf; /* crlf mode */
250 } Key;
251
252 typedef struct {
253 int mode;
254 int type;
255 int snap;
256 /*
257 * Selection variables:
258 * nb – normalized coordinates of the beginning of the selection
259 * ne – normalized coordinates of the end of the selection
260 * ob – original coordinates of the beginning of the selection
261 * oe – original coordinates of the end of the selection
262 */
263 struct {
264 int x, y;
265 } nb, ne, ob, oe;
266
267 char *clip;
268 Atom xtarget;
269 bool alt;
270 struct timeval tclick1;
271 struct timeval tclick2;
272 } Selection;
273
274 typedef union {
275 int i;
276 unsigned int ui;
277 float f;
278 const void *v;
279 } Arg;
280
281 typedef struct {
282 unsigned int mod;
283 KeySym keysym;
284 void (*func)(const Arg *);
285 const Arg arg;
286 } Shortcut;
287
288 /* function definitions used in config.h */
289 static void clippaste(const Arg *);
290 static void numlock(const Arg *);
291 static void selpaste(const Arg *);
292 static void xzoom(const Arg *);
293
294 /* Config.h for applying patches and the configuration. */
295 #include "config.h"
296
297 /* Font structure */
298 typedef struct {
299 int height;
300 int width;
301 int ascent;
302 int descent;
303 short lbearing;
304 short rbearing;
305 XftFont *match;
306 FcFontSet *set;
307 FcPattern *pattern;
308 } Font;
309
310 /* Drawing Context */
311 typedef struct {
312 Colour col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
313 Font font, bfont, ifont, ibfont;
314 GC gc;
315 } DC;
316
317 static void die(const char *, ...);
318 static void draw(void);
319 static void redraw(int);
320 static void drawregion(int, int, int, int);
321 static void execsh(void);
322 static void sigchld(int);
323 static void run(void);
324
325 static void csidump(void);
326 static void csihandle(void);
327 static void csiparse(void);
328 static void csireset(void);
329 static void strdump(void);
330 static void strhandle(void);
331 static void strparse(void);
332 static void strreset(void);
333
334 static int tattrset(int);
335 static void tclearregion(int, int, int, int);
336 static void tcursor(int);
337 static void tdeletechar(int);
338 static void tdeleteline(int);
339 static void tinsertblank(int);
340 static void tinsertblankline(int);
341 static void tmoveto(int, int);
342 static void tmoveato(int x, int y);
343 static void tnew(int, int);
344 static void tnewline(int);
345 static void tputtab(bool);
346 static void tputc(char *, int);
347 static void treset(void);
348 static int tresize(int, int);
349 static void tscrollup(int, int);
350 static void tscrolldown(int, int);
351 static void tsetattr(int*, int);
352 static void tsetchar(char *, Glyph *, int, int);
353 static void tsetscroll(int, int);
354 static void tswapscreen(void);
355 static void tsetdirt(int, int);
356 static void tsetdirtattr(int);
357 static void tsetmode(bool, bool, int *, int);
358 static void tfulldirt(void);
359 static void techo(char *, int);
360
361 static inline bool match(uint, uint);
362 static void ttynew(void);
363 static void ttyread(void);
364 static void ttyresize(void);
365 static void ttywrite(const char *, size_t);
366
367 static void xdraws(char *, Glyph, int, int, int, int);
368 static void xhints(void);
369 static void xclear(int, int, int, int);
370 static void xdrawcursor(void);
371 static void xinit(void);
372 static void xloadcols(void);
373 static int xsetcolorname(int, const char *);
374 static int xloadfont(Font *, FcPattern *);
375 static void xloadfonts(char *, int);
376 static int xloadfontset(Font *);
377 static void xsettitle(char *);
378 static void xresettitle(void);
379 static void xsetpointermotion(int);
380 static void xseturgency(int);
381 static void xsetsel(char*);
382 static void xtermclear(int, int, int, int);
383 static void xunloadfont(Font *f);
384 static void xunloadfonts(void);
385 static void xresize(int, int);
386
387 static void expose(XEvent *);
388 static void visibility(XEvent *);
389 static void unmap(XEvent *);
390 static char *kmap(KeySym, uint);
391 static void kpress(XEvent *);
392 static void cmessage(XEvent *);
393 static void cresize(int, int);
394 static void resize(XEvent *);
395 static void focus(XEvent *);
396 static void brelease(XEvent *);
397 static void bpress(XEvent *);
398 static void bmotion(XEvent *);
399 static void selnotify(XEvent *);
400 static void selclear(XEvent *);
401 static void selrequest(XEvent *);
402
403 static void selinit(void);
404 static void selsort(void);
405 static inline bool selected(int, int);
406 static void selcopy(void);
407 static void selscroll(int, int);
408 static void selsnap(int, int *, int *, int);
409
410 static int utf8decode(char *, long *);
411 static int utf8encode(long *, char *);
412 static int utf8size(char *);
413 static int isfullutf8(char *, int);
414
415 static ssize_t xwrite(int, char *, size_t);
416 static void *xmalloc(size_t);
417 static void *xrealloc(void *, size_t);
418 static void *xcalloc(size_t, size_t);
419
420 static void (*handler[LASTEvent])(XEvent *) = {
421 [KeyPress] = kpress,
422 [ClientMessage] = cmessage,
423 [ConfigureNotify] = resize,
424 [VisibilityNotify] = visibility,
425 [UnmapNotify] = unmap,
426 [Expose] = expose,
427 [FocusIn] = focus,
428 [FocusOut] = focus,
429 [MotionNotify] = bmotion,
430 [ButtonPress] = bpress,
431 [ButtonRelease] = brelease,
432 [SelectionClear] = selclear,
433 [SelectionNotify] = selnotify,
434 [SelectionRequest] = selrequest,
435 };
436
437 /* Globals */
438 static DC dc;
439 static XWindow xw;
440 static Term term;
441 static CSIEscape csiescseq;
442 static STREscape strescseq;
443 static int cmdfd;
444 static pid_t pid;
445 static Selection sel;
446 static int iofd = -1;
447 static char **opt_cmd = NULL;
448 static char *opt_io = NULL;
449 static char *opt_title = NULL;
450 static char *opt_embed = NULL;
451 static char *opt_class = NULL;
452 static char *opt_font = NULL;
453 static int oldbutton = 3; /* button event on startup: 3 = release */
454
455 static char *usedfont = NULL;
456 static int usedfontsize = 0;
457
458 /* Font Ring Cache */
459 enum {
460 FRC_NORMAL,
461 FRC_ITALIC,
462 FRC_BOLD,
463 FRC_ITALICBOLD
464 };
465
466 typedef struct {
467 XftFont *font;
468 long c;
469 int flags;
470 } Fontcache;
471
472 /*
473 * Fontcache is a ring buffer, with frccur as current position and frclen as
474 * the current length of used elements.
475 */
476
477 static Fontcache frc[1024];
478 static int frccur = -1, frclen = 0;
479
480 ssize_t
481 xwrite(int fd, char *s, size_t len) {
482 size_t aux = len;
483
484 while(len > 0) {
485 ssize_t r = write(fd, s, len);
486 if(r < 0)
487 return r;
488 len -= r;
489 s += r;
490 }
491 return aux;
492 }
493
494 void *
495 xmalloc(size_t len) {
496 void *p = malloc(len);
497
498 if(!p)
499 die("Out of memory\n");
500
501 return p;
502 }
503
504 void *
505 xrealloc(void *p, size_t len) {
506 if((p = realloc(p, len)) == NULL)
507 die("Out of memory\n");
508
509 return p;
510 }
511
512 void *
513 xcalloc(size_t nmemb, size_t size) {
514 void *p = calloc(nmemb, size);
515
516 if(!p)
517 die("Out of memory\n");
518
519 return p;
520 }
521
522 int
523 utf8decode(char *s, long *u) {
524 uchar c;
525 int i, n, rtn;
526
527 rtn = 1;
528 c = *s;
529 if(~c & B7) { /* 0xxxxxxx */
530 *u = c;
531 return rtn;
532 } else if((c & (B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */
533 *u = c&(B4|B3|B2|B1|B0);
534 n = 1;
535 } else if((c & (B7|B6|B5|B4)) == (B7|B6|B5)) { /* 1110xxxx */
536 *u = c&(B3|B2|B1|B0);
537 n = 2;
538 } else if((c & (B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) { /* 11110xxx */
539 *u = c & (B2|B1|B0);
540 n = 3;
541 } else {
542 goto invalid;
543 }
544
545 for(i = n, ++s; i > 0; --i, ++rtn, ++s) {
546 c = *s;
547 if((c & (B7|B6)) != B7) /* 10xxxxxx */
548 goto invalid;
549 *u <<= 6;
550 *u |= c & (B5|B4|B3|B2|B1|B0);
551 }
552
553 if((n == 1 && *u < 0x80) ||
554 (n == 2 && *u < 0x800) ||
555 (n == 3 && *u < 0x10000) ||
556 (*u >= 0xD800 && *u <= 0xDFFF)) {
557 goto invalid;
558 }
559
560 return rtn;
561 invalid:
562 *u = 0xFFFD;
563
564 return rtn;
565 }
566
567 int
568 utf8encode(long *u, char *s) {
569 uchar *sp;
570 ulong uc;
571 int i, n;
572
573 sp = (uchar *)s;
574 uc = *u;
575 if(uc < 0x80) {
576 *sp = uc; /* 0xxxxxxx */
577 return 1;
578 } else if(*u < 0x800) {
579 *sp = (uc >> 6) | (B7|B6); /* 110xxxxx */
580 n = 1;
581 } else if(uc < 0x10000) {
582 *sp = (uc >> 12) | (B7|B6|B5); /* 1110xxxx */
583 n = 2;
584 } else if(uc <= 0x10FFFF) {
585 *sp = (uc >> 18) | (B7|B6|B5|B4); /* 11110xxx */
586 n = 3;
587 } else {
588 goto invalid;
589 }
590
591 for(i=n,++sp; i>0; --i,++sp)
592 *sp = ((uc >> 6*(i-1)) & (B5|B4|B3|B2|B1|B0)) | B7; /* 10xxxxxx */
593
594 return n+1;
595 invalid:
596 /* U+FFFD */
597 *s++ = '\xEF';
598 *s++ = '\xBF';
599 *s = '\xBD';
600
601 return 3;
602 }
603
604 /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
605 UTF-8 otherwise return 0 */
606 int
607 isfullutf8(char *s, int b) {
608 uchar *c1, *c2, *c3;
609
610 c1 = (uchar *)s;
611 c2 = (uchar *)++s;
612 c3 = (uchar *)++s;
613 if(b < 1) {
614 return 0;
615 } else if((*c1&(B7|B6|B5)) == (B7|B6) && b == 1) {
616 return 0;
617 } else if((*c1&(B7|B6|B5|B4)) == (B7|B6|B5) &&
618 ((b == 1) ||
619 ((b == 2) && (*c2&(B7|B6)) == B7))) {
620 return 0;
621 } else if((*c1&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4) &&
622 ((b == 1) ||
623 ((b == 2) && (*c2&(B7|B6)) == B7) ||
624 ((b == 3) && (*c2&(B7|B6)) == B7 && (*c3&(B7|B6)) == B7))) {
625 return 0;
626 } else {
627 return 1;
628 }
629 }
630
631 int
632 utf8size(char *s) {
633 uchar c = *s;
634
635 if(~c&B7) {
636 return 1;
637 } else if((c&(B7|B6|B5)) == (B7|B6)) {
638 return 2;
639 } else if((c&(B7|B6|B5|B4)) == (B7|B6|B5)) {
640 return 3;
641 } else {
642 return 4;
643 }
644 }
645
646 static void
647 selinit(void) {
648 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
649 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
650 sel.mode = 0;
651 sel.ob.x = -1;
652 sel.clip = NULL;
653 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
654 if(sel.xtarget == None)
655 sel.xtarget = XA_STRING;
656 }
657
658 static int
659 x2col(int x) {
660 x -= borderpx;
661 x /= xw.cw;
662
663 return LIMIT(x, 0, term.col-1);
664 }
665
666 static int
667 y2row(int y) {
668 y -= borderpx;
669 y /= xw.ch;
670
671 return LIMIT(y, 0, term.row-1);
672 }
673
674 static void
675 selsort(void) {
676 if(sel.ob.y == sel.oe.y) {
677 sel.nb.x = MIN(sel.ob.x, sel.oe.x);
678 sel.ne.x = MAX(sel.ob.x, sel.oe.x);
679 } else {
680 sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
681 sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
682 }
683 sel.nb.y = MIN(sel.ob.y, sel.oe.y);
684 sel.ne.y = MAX(sel.ob.y, sel.oe.y);
685 }
686
687 static inline bool
688 selected(int x, int y) {
689 if(sel.ne.y == y && sel.nb.y == y)
690 return BETWEEN(x, sel.nb.x, sel.ne.x);
691
692 if(sel.type == SEL_RECTANGULAR) {
693 return ((sel.nb.y <= y && y <= sel.ne.y)
694 && (sel.nb.x <= x && x <= sel.ne.x));
695 }
696
697 return ((sel.nb.y < y && y < sel.ne.y)
698 || (y == sel.ne.y && x <= sel.ne.x))
699 || (y == sel.nb.y && x >= sel.nb.x
700 && (x <= sel.ne.x || sel.nb.y != sel.ne.y));
701 }
702
703 void
704 selsnap(int mode, int *x, int *y, int direction) {
705 int i;
706
707 switch(mode) {
708 case SNAP_WORD:
709 /*
710 * Snap around if the word wraps around at the end or
711 * beginning of a line.
712 */
713 for(;;) {
714 if(direction < 0 && *x <= 0) {
715 if(*y > 0 && term.line[*y - 1][term.col-1].mode
716 & ATTR_WRAP) {
717 *y -= 1;
718 *x = term.col-1;
719 } else {
720 break;
721 }
722 }
723 if(direction > 0 && *x >= term.col-1) {
724 if(*y < term.row-1 && term.line[*y][*x].mode
725 & ATTR_WRAP) {
726 *y += 1;
727 *x = 0;
728 } else {
729 break;
730 }
731 }
732
733 if(strchr(worddelimiters,
734 term.line[*y][*x + direction].c[0])) {
735 break;
736 }
737
738 *x += direction;
739 }
740 break;
741 case SNAP_LINE:
742 /*
743 * Snap around if the the previous line or the current one
744 * has set ATTR_WRAP at its end. Then the whole next or
745 * previous line will be selected.
746 */
747 *x = (direction < 0) ? 0 : term.col - 1;
748 if(direction < 0 && *y > 0) {
749 for(; *y > 0; *y += direction) {
750 if(!(term.line[*y-1][term.col-1].mode
751 & ATTR_WRAP)) {
752 break;
753 }
754 }
755 } else if(direction > 0 && *y < term.row-1) {
756 for(; *y < term.row; *y += direction) {
757 if(!(term.line[*y][term.col-1].mode
758 & ATTR_WRAP)) {
759 break;
760 }
761 }
762 }
763 break;
764 default:
765 /*
766 * Select the whole line when the end of line is reached.
767 */
768 if(direction > 0) {
769 i = term.col;
770 while(--i > 0 && term.line[*y][i].c[0] == ' ')
771 /* nothing */;
772 if(i > 0 && i < *x)
773 *x = term.col - 1;
774 }
775 break;
776 }
777 }
778
779 void
780 getbuttoninfo(XEvent *e) {
781 int type;
782 uint state = e->xbutton.state &~Button1Mask;
783
784 sel.alt = IS_SET(MODE_ALTSCREEN);
785
786 sel.oe.x = x2col(e->xbutton.x);
787 sel.oe.y = y2row(e->xbutton.y);
788
789 if(sel.ob.y < sel.oe.y
790 || (sel.ob.y == sel.oe.y && sel.ob.x < sel.oe.x)) {
791 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
792 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
793 } else {
794 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, -1);
795 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, +1);
796 }
797 selsort();
798
799 sel.type = SEL_REGULAR;
800 for(type = 1; type < LEN(selmasks); ++type) {
801 if(match(selmasks[type], state)) {
802 sel.type = type;
803 break;
804 }
805 }
806 }
807
808 void
809 mousereport(XEvent *e) {
810 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
811 button = e->xbutton.button, state = e->xbutton.state,
812 len;
813 char buf[40];
814 static int ox, oy;
815
816 /* from urxvt */
817 if(e->xbutton.type == MotionNotify) {
818 if(x == ox && y == oy)
819 return;
820 if(!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
821 return;
822 /* MOUSE_MOTION: no reporting if no button is pressed */
823 if(IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
824 return;
825
826 button = oldbutton + 32;
827 ox = x;
828 oy = y;
829 } else if(!IS_SET(MODE_MOUSESGR)
830 && (e->xbutton.type == ButtonRelease
831 || button == AnyButton)) {
832 button = 3;
833 } else {
834 button -= Button1;
835 if(button >= 3)
836 button += 64 - 3;
837 if(e->xbutton.type == ButtonPress) {
838 oldbutton = button;
839 ox = x;
840 oy = y;
841 }
842 }
843
844 if(!IS_SET(MODE_MOUSEX10)) {
845 button += (state & ShiftMask ? 4 : 0)
846 + (state & Mod4Mask ? 8 : 0)
847 + (state & ControlMask ? 16 : 0);
848 }
849
850 len = 0;
851 if(IS_SET(MODE_MOUSESGR)) {
852 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
853 button, x+1, y+1,
854 e->xbutton.type == ButtonRelease ? 'm' : 'M');
855 } else if(x < 223 && y < 223) {
856 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
857 IS_SET(MODE_MOUSEX10)? button-1 : 32+button,
858 32+x+1, 32+y+1);
859 } else {
860 return;
861 }
862
863 ttywrite(buf, len);
864 }
865
866 void
867 bpress(XEvent *e) {
868 struct timeval now;
869 Mousekey *mk;
870
871 if(IS_SET(MODE_MOUSE)) {
872 mousereport(e);
873 return;
874 }
875
876 for(mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
877 if(e->xbutton.button == mk->b
878 && match(mk->mask, e->xbutton.state)) {
879 ttywrite(mk->s, strlen(mk->s));
880 if(IS_SET(MODE_ECHO))
881 techo(mk->s, strlen(mk->s));
882 return;
883 }
884 }
885
886 if(e->xbutton.button == Button1) {
887 gettimeofday(&now, NULL);
888
889 /* Clear previous selection, logically and visually. */
890 if(sel.ob.x != -1) {
891 sel.ob.x = -1;
892 tsetdirt(sel.nb.y, sel.ne.y);
893 draw();
894 }
895 sel.mode = 1;
896 sel.type = SEL_REGULAR;
897 sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
898 sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
899
900 /*
901 * If the user clicks below predefined timeouts specific
902 * snapping behaviour is exposed.
903 */
904 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
905 sel.snap = SNAP_LINE;
906 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
907 sel.snap = SNAP_WORD;
908 } else {
909 sel.snap = 0;
910 }
911 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
912 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
913 selsort();
914
915 /*
916 * Draw selection, unless it's regular and we don't want to
917 * make clicks visible
918 */
919 if(sel.snap != 0) {
920 sel.mode++;
921 tsetdirt(sel.nb.y, sel.ne.y);
922 draw();
923 }
924 sel.tclick2 = sel.tclick1;
925 sel.tclick1 = now;
926 }
927 }
928
929 void
930 selcopy(void) {
931 char *str, *ptr;
932 int x, y, bufsize, size, i, ex;
933 Glyph *gp, *last;
934
935 if(sel.ob.x == -1) {
936 str = NULL;
937 } else {
938 bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
939 ptr = str = xmalloc(bufsize);
940
941 /* append every set & selected glyph to the selection */
942 for(y = sel.nb.y; y < sel.ne.y + 1; y++) {
943 gp = &term.line[y][0];
944 last = gp + term.col;
945
946 while(--last >= gp && !(selected(last - gp, y) && \
947 strcmp(last->c, " ") != 0))
948 /* nothing */;
949
950 for(x = 0; gp <= last; x++, ++gp) {
951 if(!selected(x, y))
952 continue;
953
954 size = utf8size(gp->c);
955 memcpy(ptr, gp->c, size);
956 ptr += size;
957 }
958
959 /*
960 * Copy and pasting of line endings is inconsistent
961 * in the inconsistent terminal and GUI world.
962 * The best solution seems like to produce '\n' when
963 * something is copied from st and convert '\n' to
964 * '\r', when something to be pasted is received by
965 * st.
966 * FIXME: Fix the computer world.
967 */
968 if(y < sel.ne.y && !((gp-1)->mode & ATTR_WRAP))
969 *ptr++ = '\n';
970
971 /*
972 * If the last selected line expands in the selection
973 * after the visible text '\n' is appended.
974 */
975 if(y == sel.ne.y) {
976 i = term.col;
977 while(--i > 0 && term.line[y][i].c[0] == ' ')
978 /* nothing */;
979 ex = sel.ne.x;
980 if(sel.nb.y == sel.ne.y && sel.ne.x < sel.nb.x)
981 ex = sel.nb.x;
982 if(i < ex)
983 *ptr++ = '\n';
984 }
985 }
986 *ptr = 0;
987 }
988 xsetsel(str);
989 }
990
991 void
992 selnotify(XEvent *e) {
993 ulong nitems, ofs, rem;
994 int format;
995 uchar *data, *last, *repl;
996 Atom type;
997
998 ofs = 0;
999 do {
1000 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
1001 False, AnyPropertyType, &type, &format,
1002 &nitems, &rem, &data)) {
1003 fprintf(stderr, "Clipboard allocation failed\n");
1004 return;
1005 }
1006
1007 /*
1008 * As seen in selcopy:
1009 * Line endings are inconsistent in the terminal and GUI world
1010 * copy and pasting. When receiving some selection data,
1011 * replace all '\n' with '\r'.
1012 * FIXME: Fix the computer world.
1013 */
1014 repl = data;
1015 last = data + nitems * format / 8;
1016 while((repl = memchr(repl, '\n', last - repl))) {
1017 *repl++ = '\r';
1018 }
1019
1020 ttywrite((const char *)data, nitems * format / 8);
1021 XFree(data);
1022 /* number of 32-bit chunks returned */
1023 ofs += nitems * format / 32;
1024 } while(rem > 0);
1025 }
1026
1027 void
1028 selpaste(const Arg *dummy) {
1029 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
1030 xw.win, CurrentTime);
1031 }
1032
1033 void
1034 clippaste(const Arg *dummy) {
1035 Atom clipboard;
1036
1037 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1038 XConvertSelection(xw.dpy, clipboard, sel.xtarget, XA_PRIMARY,
1039 xw.win, CurrentTime);
1040 }
1041
1042 void
1043 selclear(XEvent *e) {
1044 if(sel.ob.x == -1)
1045 return;
1046 sel.ob.x = -1;
1047 tsetdirt(sel.nb.y, sel.ne.y);
1048 }
1049
1050 void
1051 selrequest(XEvent *e) {
1052 XSelectionRequestEvent *xsre;
1053 XSelectionEvent xev;
1054 Atom xa_targets, string;
1055
1056 xsre = (XSelectionRequestEvent *) e;
1057 xev.type = SelectionNotify;
1058 xev.requestor = xsre->requestor;
1059 xev.selection = xsre->selection;
1060 xev.target = xsre->target;
1061 xev.time = xsre->time;
1062 /* reject */
1063 xev.property = None;
1064
1065 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
1066 if(xsre->target == xa_targets) {
1067 /* respond with the supported type */
1068 string = sel.xtarget;
1069 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1070 XA_ATOM, 32, PropModeReplace,
1071 (uchar *) &string, 1);
1072 xev.property = xsre->property;
1073 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
1074 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1075 xsre->target, 8, PropModeReplace,
1076 (uchar *) sel.clip, strlen(sel.clip));
1077 xev.property = xsre->property;
1078 }
1079
1080 /* all done, send a notification to the listener */
1081 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
1082 fprintf(stderr, "Error sending SelectionNotify event\n");
1083 }
1084
1085 void
1086 xsetsel(char *str) {
1087 /* register the selection for both the clipboard and the primary */
1088 Atom clipboard;
1089
1090 free(sel.clip);
1091 sel.clip = str;
1092
1093 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
1094
1095 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1096 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
1097 }
1098
1099 void
1100 brelease(XEvent *e) {
1101 if(IS_SET(MODE_MOUSE)) {
1102 mousereport(e);
1103 return;
1104 }
1105
1106 if(e->xbutton.button == Button2) {
1107 selpaste(NULL);
1108 } else if(e->xbutton.button == Button1) {
1109 if(sel.mode < 2) {
1110 sel.ob.x = -1;
1111 } else {
1112 getbuttoninfo(e);
1113 selcopy();
1114 }
1115 sel.mode = 0;
1116 tsetdirt(sel.nb.y, sel.ne.y);
1117 }
1118 }
1119
1120 void
1121 bmotion(XEvent *e) {
1122 int oldey, oldex, oldsby, oldsey;
1123
1124 if(IS_SET(MODE_MOUSE)) {
1125 mousereport(e);
1126 return;
1127 }
1128
1129 if(!sel.mode)
1130 return;
1131
1132 sel.mode++;
1133 oldey = sel.oe.y;
1134 oldex = sel.oe.x;
1135 oldsby = sel.nb.y;
1136 oldsey = sel.ne.y;
1137 getbuttoninfo(e);
1138
1139 if(oldey != sel.oe.y || oldex != sel.oe.x)
1140 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
1141 }
1142
1143 void
1144 die(const char *errstr, ...) {
1145 va_list ap;
1146
1147 va_start(ap, errstr);
1148 vfprintf(stderr, errstr, ap);
1149 va_end(ap);
1150 exit(EXIT_FAILURE);
1151 }
1152
1153 void
1154 execsh(void) {
1155 char **args;
1156 char *envshell = getenv("SHELL");
1157 const struct passwd *pass = getpwuid(getuid());
1158 char buf[sizeof(long) * 8 + 1];
1159
1160 unsetenv("COLUMNS");
1161 unsetenv("LINES");
1162 unsetenv("TERMCAP");
1163
1164 if(pass) {
1165 setenv("LOGNAME", pass->pw_name, 1);
1166 setenv("USER", pass->pw_name, 1);
1167 setenv("SHELL", pass->pw_shell, 0);
1168 setenv("HOME", pass->pw_dir, 0);
1169 }
1170
1171 snprintf(buf, sizeof(buf), "%lu", xw.win);
1172 setenv("WINDOWID", buf, 1);
1173
1174 signal(SIGCHLD, SIG_DFL);
1175 signal(SIGHUP, SIG_DFL);
1176 signal(SIGINT, SIG_DFL);
1177 signal(SIGQUIT, SIG_DFL);
1178 signal(SIGTERM, SIG_DFL);
1179 signal(SIGALRM, SIG_DFL);
1180
1181 DEFAULT(envshell, shell);
1182 setenv("TERM", termname, 1);
1183 args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
1184 execvp(args[0], args);
1185 exit(EXIT_FAILURE);
1186 }
1187
1188 void
1189 sigchld(int a) {
1190 int stat = 0;
1191
1192 if(waitpid(pid, &stat, 0) < 0)
1193 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
1194
1195 if(WIFEXITED(stat)) {
1196 exit(WEXITSTATUS(stat));
1197 } else {
1198 exit(EXIT_FAILURE);
1199 }
1200 }
1201
1202 void
1203 ttynew(void) {
1204 int m, s;
1205 struct winsize w = {term.row, term.col, 0, 0};
1206
1207 /* seems to work fine on linux, openbsd and freebsd */
1208 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1209 die("openpty failed: %s\n", SERRNO);
1210
1211 switch(pid = fork()) {
1212 case -1:
1213 die("fork failed\n");
1214 break;
1215 case 0:
1216 setsid(); /* create a new process group */
1217 dup2(s, STDIN_FILENO);
1218 dup2(s, STDOUT_FILENO);
1219 dup2(s, STDERR_FILENO);
1220 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1221 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
1222 close(s);
1223 close(m);
1224 execsh();
1225 break;
1226 default:
1227 close(s);
1228 cmdfd = m;
1229 signal(SIGCHLD, sigchld);
1230 if(opt_io) {
1231 iofd = (!strcmp(opt_io, "-")) ?
1232 STDOUT_FILENO :
1233 open(opt_io, O_WRONLY | O_CREAT, 0666);
1234 if(iofd < 0) {
1235 fprintf(stderr, "Error opening %s:%s\n",
1236 opt_io, strerror(errno));
1237 }
1238 }
1239 }
1240 }
1241
1242 void
1243 dump(char c) {
1244 static int col;
1245
1246 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
1247 if(++col % 10 == 0)
1248 fprintf(stderr, "\n");
1249 }
1250
1251 void
1252 ttyread(void) {
1253 static char buf[BUFSIZ];
1254 static int buflen = 0;
1255 char *ptr;
1256 char s[UTF_SIZ];
1257 int charsize; /* size of utf8 char in bytes */
1258 long utf8c;
1259 int ret;
1260
1261 /* append read bytes to unprocessed bytes */
1262 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1263 die("Couldn't read from shell: %s\n", SERRNO);
1264
1265 /* process every complete utf8 char */
1266 buflen += ret;
1267 ptr = buf;
1268 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
1269 charsize = utf8decode(ptr, &utf8c);
1270 utf8encode(&utf8c, s);
1271 tputc(s, charsize);
1272 ptr += charsize;
1273 buflen -= charsize;
1274 }
1275
1276 /* keep any uncomplete utf8 char for the next call */
1277 memmove(buf, ptr, buflen);
1278 }
1279
1280 void
1281 ttywrite(const char *s, size_t n) {
1282 if(write(cmdfd, s, n) == -1)
1283 die("write error on tty: %s\n", SERRNO);
1284 }
1285
1286 void
1287 ttyresize(void) {
1288 struct winsize w;
1289
1290 w.ws_row = term.row;
1291 w.ws_col = term.col;
1292 w.ws_xpixel = xw.tw;
1293 w.ws_ypixel = xw.th;
1294 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1295 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
1296 }
1297
1298 int
1299 tattrset(int attr) {
1300 int i, j;
1301
1302 for(i = 0; i < term.row-1; i++) {
1303 for(j = 0; j < term.col-1; j++) {
1304 if(term.line[i][j].mode & attr)
1305 return 1;
1306 }
1307 }
1308
1309 return 0;
1310 }
1311
1312 void
1313 tsetdirt(int top, int bot) {
1314 int i;
1315
1316 LIMIT(top, 0, term.row-1);
1317 LIMIT(bot, 0, term.row-1);
1318
1319 for(i = top; i <= bot; i++)
1320 term.dirty[i] = 1;
1321 }
1322
1323 void
1324 tsetdirtattr(int attr) {
1325 int i, j;
1326
1327 for(i = 0; i < term.row-1; i++) {
1328 for(j = 0; j < term.col-1; j++) {
1329 if(term.line[i][j].mode & attr) {
1330 tsetdirt(i, i);
1331 break;
1332 }
1333 }
1334 }
1335 }
1336
1337 void
1338 tfulldirt(void) {
1339 tsetdirt(0, term.row-1);
1340 }
1341
1342 void
1343 tcursor(int mode) {
1344 static TCursor c;
1345
1346 if(mode == CURSOR_SAVE) {
1347 c = term.c;
1348 } else if(mode == CURSOR_LOAD) {
1349 term.c = c;
1350 tmoveto(c.x, c.y);
1351 }
1352 }
1353
1354 void
1355 treset(void) {
1356 uint i;
1357
1358 term.c = (TCursor){{
1359 .mode = ATTR_NULL,
1360 .fg = defaultfg,
1361 .bg = defaultbg
1362 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1363
1364 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1365 for(i = tabspaces; i < term.col; i += tabspaces)
1366 term.tabs[i] = 1;
1367 term.top = 0;
1368 term.bot = term.row - 1;
1369 term.mode = MODE_WRAP;
1370
1371 tclearregion(0, 0, term.col-1, term.row-1);
1372 tmoveto(0, 0);
1373 tcursor(CURSOR_SAVE);
1374 }
1375
1376 void
1377 tnew(int col, int row) {
1378 memset(&term, 0, sizeof(Term));
1379 tresize(col, row);
1380 term.numlock = 1;
1381
1382 treset();
1383 }
1384
1385 void
1386 tswapscreen(void) {
1387 Line *tmp = term.line;
1388
1389 term.line = term.alt;
1390 term.alt = tmp;
1391 term.mode ^= MODE_ALTSCREEN;
1392 tfulldirt();
1393 }
1394
1395 void
1396 tscrolldown(int orig, int n) {
1397 int i;
1398 Line temp;
1399
1400 LIMIT(n, 0, term.bot-orig+1);
1401
1402 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1403
1404 for(i = term.bot; i >= orig+n; i--) {
1405 temp = term.line[i];
1406 term.line[i] = term.line[i-n];
1407 term.line[i-n] = temp;
1408
1409 term.dirty[i] = 1;
1410 term.dirty[i-n] = 1;
1411 }
1412
1413 selscroll(orig, n);
1414 }
1415
1416 void
1417 tscrollup(int orig, int n) {
1418 int i;
1419 Line temp;
1420 LIMIT(n, 0, term.bot-orig+1);
1421
1422 tclearregion(0, orig, term.col-1, orig+n-1);
1423
1424 for(i = orig; i <= term.bot-n; i++) {
1425 temp = term.line[i];
1426 term.line[i] = term.line[i+n];
1427 term.line[i+n] = temp;
1428
1429 term.dirty[i] = 1;
1430 term.dirty[i+n] = 1;
1431 }
1432
1433 selscroll(orig, -n);
1434 }
1435
1436 void
1437 selscroll(int orig, int n) {
1438 if(sel.ob.x == -1)
1439 return;
1440
1441 if(BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
1442 if((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
1443 sel.ob.x = -1;
1444 return;
1445 }
1446 if(sel.type == SEL_RECTANGULAR) {
1447 if(sel.ob.y < term.top)
1448 sel.ob.y = term.top;
1449 if(sel.oe.y > term.bot)
1450 sel.oe.y = term.bot;
1451 } else {
1452 if(sel.ob.y < term.top) {
1453 sel.ob.y = term.top;
1454 sel.ob.x = 0;
1455 }
1456 if(sel.oe.y > term.bot) {
1457 sel.oe.y = term.bot;
1458 sel.oe.x = term.col;
1459 }
1460 }
1461 selsort();
1462 }
1463 }
1464
1465 void
1466 tnewline(int first_col) {
1467 int y = term.c.y;
1468
1469 if(y == term.bot) {
1470 tscrollup(term.top, 1);
1471 } else {
1472 y++;
1473 }
1474 tmoveto(first_col ? 0 : term.c.x, y);
1475 }
1476
1477 void
1478 csiparse(void) {
1479 char *p = csiescseq.buf, *np;
1480 long int v;
1481
1482 csiescseq.narg = 0;
1483 if(*p == '?') {
1484 csiescseq.priv = 1;
1485 p++;
1486 }
1487
1488 csiescseq.buf[csiescseq.len] = '\0';
1489 while(p < csiescseq.buf+csiescseq.len) {
1490 np = NULL;
1491 v = strtol(p, &np, 10);
1492 if(np == p)
1493 v = 0;
1494 if(v == LONG_MAX || v == LONG_MIN)
1495 v = -1;
1496 csiescseq.arg[csiescseq.narg++] = v;
1497 p = np;
1498 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1499 break;
1500 p++;
1501 }
1502 csiescseq.mode = *p;
1503 }
1504
1505 /* for absolute user moves, when decom is set */
1506 void
1507 tmoveato(int x, int y) {
1508 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1509 }
1510
1511 void
1512 tmoveto(int x, int y) {
1513 int miny, maxy;
1514
1515 if(term.c.state & CURSOR_ORIGIN) {
1516 miny = term.top;
1517 maxy = term.bot;
1518 } else {
1519 miny = 0;
1520 maxy = term.row - 1;
1521 }
1522 LIMIT(x, 0, term.col-1);
1523 LIMIT(y, miny, maxy);
1524 term.c.state &= ~CURSOR_WRAPNEXT;
1525 term.c.x = x;
1526 term.c.y = y;
1527 }
1528
1529 void
1530 tsetchar(char *c, Glyph *attr, int x, int y) {
1531 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1532 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1533 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1534 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1535 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1536 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1537 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1538 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1539 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1540 };
1541
1542 /*
1543 * The table is proudly stolen from rxvt.
1544 */
1545 if(attr->mode & ATTR_GFX) {
1546 if(c[0] >= 0x41 && c[0] <= 0x7e
1547 && vt100_0[c[0] - 0x41]) {
1548 c = vt100_0[c[0] - 0x41];
1549 }
1550 }
1551
1552 term.dirty[y] = 1;
1553 term.line[y][x] = *attr;
1554 memcpy(term.line[y][x].c, c, UTF_SIZ);
1555 }
1556
1557 void
1558 tclearregion(int x1, int y1, int x2, int y2) {
1559 int x, y, temp;
1560
1561 if(x1 > x2)
1562 temp = x1, x1 = x2, x2 = temp;
1563 if(y1 > y2)
1564 temp = y1, y1 = y2, y2 = temp;
1565
1566 LIMIT(x1, 0, term.col-1);
1567 LIMIT(x2, 0, term.col-1);
1568 LIMIT(y1, 0, term.row-1);
1569 LIMIT(y2, 0, term.row-1);
1570
1571 for(y = y1; y <= y2; y++) {
1572 term.dirty[y] = 1;
1573 for(x = x1; x <= x2; x++) {
1574 if(selected(x, y))
1575 selclear(NULL);
1576 term.line[y][x] = term.c.attr;
1577 memcpy(term.line[y][x].c, " ", 2);
1578 }
1579 }
1580 }
1581
1582 void
1583 tdeletechar(int n) {
1584 int src = term.c.x + n;
1585 int dst = term.c.x;
1586 int size = term.col - src;
1587
1588 term.dirty[term.c.y] = 1;
1589
1590 if(src >= term.col) {
1591 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1592 return;
1593 }
1594
1595 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1596 size * sizeof(Glyph));
1597 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1598 }
1599
1600 void
1601 tinsertblank(int n) {
1602 int src = term.c.x;
1603 int dst = src + n;
1604 int size = term.col - dst;
1605
1606 term.dirty[term.c.y] = 1;
1607
1608 if(dst >= term.col) {
1609 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1610 return;
1611 }
1612
1613 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1614 size * sizeof(Glyph));
1615 tclearregion(src, term.c.y, dst - 1, term.c.y);
1616 }
1617
1618 void
1619 tinsertblankline(int n) {
1620 if(term.c.y < term.top || term.c.y > term.bot)
1621 return;
1622
1623 tscrolldown(term.c.y, n);
1624 }
1625
1626 void
1627 tdeleteline(int n) {
1628 if(term.c.y < term.top || term.c.y > term.bot)
1629 return;
1630
1631 tscrollup(term.c.y, n);
1632 }
1633
1634 void
1635 tsetattr(int *attr, int l) {
1636 int i;
1637
1638 for(i = 0; i < l; i++) {
1639 switch(attr[i]) {
1640 case 0:
1641 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE \
1642 | ATTR_BOLD | ATTR_ITALIC \
1643 | ATTR_BLINK);
1644 term.c.attr.fg = defaultfg;
1645 term.c.attr.bg = defaultbg;
1646 break;
1647 case 1:
1648 term.c.attr.mode |= ATTR_BOLD;
1649 break;
1650 case 3:
1651 term.c.attr.mode |= ATTR_ITALIC;
1652 break;
1653 case 4:
1654 term.c.attr.mode |= ATTR_UNDERLINE;
1655 break;
1656 case 5: /* slow blink */
1657 case 6: /* rapid blink */
1658 term.c.attr.mode |= ATTR_BLINK;
1659 break;
1660 case 7:
1661 term.c.attr.mode |= ATTR_REVERSE;
1662 break;
1663 case 21:
1664 case 22:
1665 term.c.attr.mode &= ~ATTR_BOLD;
1666 break;
1667 case 23:
1668 term.c.attr.mode &= ~ATTR_ITALIC;
1669 break;
1670 case 24:
1671 term.c.attr.mode &= ~ATTR_UNDERLINE;
1672 break;
1673 case 25:
1674 case 26:
1675 term.c.attr.mode &= ~ATTR_BLINK;
1676 break;
1677 case 27:
1678 term.c.attr.mode &= ~ATTR_REVERSE;
1679 break;
1680 case 38:
1681 if(i + 2 < l && attr[i + 1] == 5) {
1682 i += 2;
1683 if(BETWEEN(attr[i], 0, 255)) {
1684 term.c.attr.fg = attr[i];
1685 } else {
1686 fprintf(stderr,
1687 "erresc: bad fgcolor %d\n",
1688 attr[i]);
1689 }
1690 } else {
1691 fprintf(stderr,
1692 "erresc(38): gfx attr %d unknown\n",
1693 attr[i]);
1694 }
1695 break;
1696 case 39:
1697 term.c.attr.fg = defaultfg;
1698 break;
1699 case 48:
1700 if(i + 2 < l && attr[i + 1] == 5) {
1701 i += 2;
1702 if(BETWEEN(attr[i], 0, 255)) {
1703 term.c.attr.bg = attr[i];
1704 } else {
1705 fprintf(stderr,
1706 "erresc: bad bgcolor %d\n",
1707 attr[i]);
1708 }
1709 } else {
1710 fprintf(stderr,
1711 "erresc(48): gfx attr %d unknown\n",
1712 attr[i]);
1713 }
1714 break;
1715 case 49:
1716 term.c.attr.bg = defaultbg;
1717 break;
1718 default:
1719 if(BETWEEN(attr[i], 30, 37)) {
1720 term.c.attr.fg = attr[i] - 30;
1721 } else if(BETWEEN(attr[i], 40, 47)) {
1722 term.c.attr.bg = attr[i] - 40;
1723 } else if(BETWEEN(attr[i], 90, 97)) {
1724 term.c.attr.fg = attr[i] - 90 + 8;
1725 } else if(BETWEEN(attr[i], 100, 107)) {
1726 term.c.attr.bg = attr[i] - 100 + 8;
1727 } else {
1728 fprintf(stderr,
1729 "erresc(default): gfx attr %d unknown\n",
1730 attr[i]), csidump();
1731 }
1732 break;
1733 }
1734 }
1735 }
1736
1737 void
1738 tsetscroll(int t, int b) {
1739 int temp;
1740
1741 LIMIT(t, 0, term.row-1);
1742 LIMIT(b, 0, term.row-1);
1743 if(t > b) {
1744 temp = t;
1745 t = b;
1746 b = temp;
1747 }
1748 term.top = t;
1749 term.bot = b;
1750 }
1751
1752 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1753
1754 void
1755 tsetmode(bool priv, bool set, int *args, int narg) {
1756 int *lim, mode;
1757 bool alt;
1758
1759 for(lim = args + narg; args < lim; ++args) {
1760 if(priv) {
1761 switch(*args) {
1762 break;
1763 case 1: /* DECCKM -- Cursor key */
1764 MODBIT(term.mode, set, MODE_APPCURSOR);
1765 break;
1766 case 5: /* DECSCNM -- Reverse video */
1767 mode = term.mode;
1768 MODBIT(term.mode, set, MODE_REVERSE);
1769 if(mode != term.mode)
1770 redraw(REDRAW_TIMEOUT);
1771 break;
1772 case 6: /* DECOM -- Origin */
1773 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1774 tmoveato(0, 0);
1775 break;
1776 case 7: /* DECAWM -- Auto wrap */
1777 MODBIT(term.mode, set, MODE_WRAP);
1778 break;
1779 case 0: /* Error (IGNORED) */
1780 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1781 case 3: /* DECCOLM -- Column (IGNORED) */
1782 case 4: /* DECSCLM -- Scroll (IGNORED) */
1783 case 8: /* DECARM -- Auto repeat (IGNORED) */
1784 case 18: /* DECPFF -- Printer feed (IGNORED) */
1785 case 19: /* DECPEX -- Printer extent (IGNORED) */
1786 case 42: /* DECNRCM -- National characters (IGNORED) */
1787 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1788 break;
1789 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1790 MODBIT(term.mode, !set, MODE_HIDE);
1791 break;
1792 case 9: /* X10 mouse compatibility mode */
1793 xsetpointermotion(0);
1794 MODBIT(term.mode, 0, MODE_MOUSE);
1795 MODBIT(term.mode, set, MODE_MOUSEX10);
1796 break;
1797 case 1000: /* 1000: report button press */
1798 xsetpointermotion(0);
1799 MODBIT(term.mode, 0, MODE_MOUSE);
1800 MODBIT(term.mode, set, MODE_MOUSEBTN);
1801 break;
1802 case 1002: /* 1002: report motion on button press */
1803 xsetpointermotion(0);
1804 MODBIT(term.mode, 0, MODE_MOUSE);
1805 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1806 break;
1807 case 1003: /* 1003: enable all mouse motions */
1808 xsetpointermotion(set);
1809 MODBIT(term.mode, 0, MODE_MOUSE);
1810 MODBIT(term.mode, set, MODE_MOUSEMANY);
1811 break;
1812 case 1004: /* 1004: send focus events to tty */
1813 MODBIT(term.mode, set, MODE_FOCUS);
1814 break;
1815 case 1006: /* 1006: extended reporting mode */
1816 MODBIT(term.mode, set, MODE_MOUSESGR);
1817 break;
1818 case 1034:
1819 MODBIT(term.mode, set, MODE_8BIT);
1820 break;
1821 case 1049: /* = 1047 and 1048 */
1822 case 47:
1823 case 1047:
1824 if (!allowaltscreen)
1825 break;
1826
1827 alt = IS_SET(MODE_ALTSCREEN);
1828 if(alt) {
1829 tclearregion(0, 0, term.col-1,
1830 term.row-1);
1831 }
1832 if(set ^ alt) /* set is always 1 or 0 */
1833 tswapscreen();
1834 if(*args != 1049)
1835 break;
1836 /* FALLTRU */
1837 case 1048:
1838 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1839 break;
1840 /* Not implemented mouse modes. See comments there. */
1841 case 1001: /* mouse highlight mode; can hang the
1842 terminal by design when implemented. */
1843 case 1005: /* UTF-8 mouse mode; will confuse
1844 applications not supporting UTF-8
1845 and luit. */
1846 case 1015: /* urxvt mangled mouse mode; incompatible
1847 and can be mistaken for other control
1848 codes. */
1849 default:
1850 fprintf(stderr,
1851 "erresc: unknown private set/reset mode %d\n",
1852 *args);
1853 break;
1854 }
1855 } else {
1856 switch(*args) {
1857 case 0: /* Error (IGNORED) */
1858 break;
1859 case 2: /* KAM -- keyboard action */
1860 MODBIT(term.mode, set, MODE_KBDLOCK);
1861 break;
1862 case 4: /* IRM -- Insertion-replacement */
1863 MODBIT(term.mode, set, MODE_INSERT);
1864 break;
1865 case 12: /* SRM -- Send/Receive */
1866 MODBIT(term.mode, !set, MODE_ECHO);
1867 break;
1868 case 20: /* LNM -- Linefeed/new line */
1869 MODBIT(term.mode, set, MODE_CRLF);
1870 break;
1871 default:
1872 fprintf(stderr,
1873 "erresc: unknown set/reset mode %d\n",
1874 *args);
1875 break;
1876 }
1877 }
1878 }
1879 }
1880
1881 void
1882 csihandle(void) {
1883 switch(csiescseq.mode) {
1884 default:
1885 unknown:
1886 fprintf(stderr, "erresc: unknown csi ");
1887 csidump();
1888 /* die(""); */
1889 break;
1890 case '@': /* ICH -- Insert <n> blank char */
1891 DEFAULT(csiescseq.arg[0], 1);
1892 tinsertblank(csiescseq.arg[0]);
1893 break;
1894 case 'A': /* CUU -- Cursor <n> Up */
1895 DEFAULT(csiescseq.arg[0], 1);
1896 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1897 break;
1898 case 'B': /* CUD -- Cursor <n> Down */
1899 case 'e': /* VPR --Cursor <n> Down */
1900 DEFAULT(csiescseq.arg[0], 1);
1901 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1902 break;
1903 case 'c': /* DA -- Device Attributes */
1904 if(csiescseq.arg[0] == 0)
1905 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1906 break;
1907 case 'C': /* CUF -- Cursor <n> Forward */
1908 case 'a': /* HPR -- Cursor <n> Forward */
1909 DEFAULT(csiescseq.arg[0], 1);
1910 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1911 break;
1912 case 'D': /* CUB -- Cursor <n> Backward */
1913 DEFAULT(csiescseq.arg[0], 1);
1914 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1915 break;
1916 case 'E': /* CNL -- Cursor <n> Down and first col */
1917 DEFAULT(csiescseq.arg[0], 1);
1918 tmoveto(0, term.c.y+csiescseq.arg[0]);
1919 break;
1920 case 'F': /* CPL -- Cursor <n> Up and first col */
1921 DEFAULT(csiescseq.arg[0], 1);
1922 tmoveto(0, term.c.y-csiescseq.arg[0]);
1923 break;
1924 case 'g': /* TBC -- Tabulation clear */
1925 switch(csiescseq.arg[0]) {
1926 case 0: /* clear current tab stop */
1927 term.tabs[term.c.x] = 0;
1928 break;
1929 case 3: /* clear all the tabs */
1930 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1931 break;
1932 default:
1933 goto unknown;
1934 }
1935 break;
1936 case 'G': /* CHA -- Move to <col> */
1937 case '`': /* HPA */
1938 DEFAULT(csiescseq.arg[0], 1);
1939 tmoveto(csiescseq.arg[0]-1, term.c.y);
1940 break;
1941 case 'H': /* CUP -- Move to <row> <col> */
1942 case 'f': /* HVP */
1943 DEFAULT(csiescseq.arg[0], 1);
1944 DEFAULT(csiescseq.arg[1], 1);
1945 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1946 break;
1947 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1948 DEFAULT(csiescseq.arg[0], 1);
1949 while(csiescseq.arg[0]--)
1950 tputtab(1);
1951 break;
1952 case 'J': /* ED -- Clear screen */
1953 sel.ob.x = -1;
1954 switch(csiescseq.arg[0]) {
1955 case 0: /* below */
1956 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1957 if(term.c.y < term.row-1) {
1958 tclearregion(0, term.c.y+1, term.col-1,
1959 term.row-1);
1960 }
1961 break;
1962 case 1: /* above */
1963 if(term.c.y > 1)
1964 tclearregion(0, 0, term.col-1, term.c.y-1);
1965 tclearregion(0, term.c.y, term.c.x, term.c.y);
1966 break;
1967 case 2: /* all */
1968 tclearregion(0, 0, term.col-1, term.row-1);
1969 break;
1970 default:
1971 goto unknown;
1972 }
1973 break;
1974 case 'K': /* EL -- Clear line */
1975 switch(csiescseq.arg[0]) {
1976 case 0: /* right */
1977 tclearregion(term.c.x, term.c.y, term.col-1,
1978 term.c.y);
1979 break;
1980 case 1: /* left */
1981 tclearregion(0, term.c.y, term.c.x, term.c.y);
1982 break;
1983 case 2: /* all */
1984 tclearregion(0, term.c.y, term.col-1, term.c.y);
1985 break;
1986 }
1987 break;
1988 case 'S': /* SU -- Scroll <n> line up */
1989 DEFAULT(csiescseq.arg[0], 1);
1990 tscrollup(term.top, csiescseq.arg[0]);
1991 break;
1992 case 'T': /* SD -- Scroll <n> line down */
1993 DEFAULT(csiescseq.arg[0], 1);
1994 tscrolldown(term.top, csiescseq.arg[0]);
1995 break;
1996 case 'L': /* IL -- Insert <n> blank lines */
1997 DEFAULT(csiescseq.arg[0], 1);
1998 tinsertblankline(csiescseq.arg[0]);
1999 break;
2000 case 'l': /* RM -- Reset Mode */
2001 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
2002 break;
2003 case 'M': /* DL -- Delete <n> lines */
2004 DEFAULT(csiescseq.arg[0], 1);
2005 tdeleteline(csiescseq.arg[0]);
2006 break;
2007 case 'X': /* ECH -- Erase <n> char */
2008 DEFAULT(csiescseq.arg[0], 1);
2009 tclearregion(term.c.x, term.c.y,
2010 term.c.x + csiescseq.arg[0] - 1, term.c.y);
2011 break;
2012 case 'P': /* DCH -- Delete <n> char */
2013 DEFAULT(csiescseq.arg[0], 1);
2014 tdeletechar(csiescseq.arg[0]);
2015 break;
2016 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
2017 DEFAULT(csiescseq.arg[0], 1);
2018 while(csiescseq.arg[0]--)
2019 tputtab(0);
2020 break;
2021 case 'd': /* VPA -- Move to <row> */
2022 DEFAULT(csiescseq.arg[0], 1);
2023 tmoveato(term.c.x, csiescseq.arg[0]-1);
2024 break;
2025 case 'h': /* SM -- Set terminal mode */
2026 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
2027 break;
2028 case 'm': /* SGR -- Terminal attribute (color) */
2029 tsetattr(csiescseq.arg, csiescseq.narg);
2030 break;
2031 case 'r': /* DECSTBM -- Set Scrolling Region */
2032 if(csiescseq.priv) {
2033 goto unknown;
2034 } else {
2035 DEFAULT(csiescseq.arg[0], 1);
2036 DEFAULT(csiescseq.arg[1], term.row);
2037 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
2038 tmoveato(0, 0);
2039 }
2040 break;
2041 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
2042 tcursor(CURSOR_SAVE);
2043 break;
2044 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
2045 tcursor(CURSOR_LOAD);
2046 break;
2047 }
2048 }
2049
2050 void
2051 csidump(void) {
2052 int i;
2053 uint c;
2054
2055 printf("ESC[");
2056 for(i = 0; i < csiescseq.len; i++) {
2057 c = csiescseq.buf[i] & 0xff;
2058 if(isprint(c)) {
2059 putchar(c);
2060 } else if(c == '\n') {
2061 printf("(\\n)");
2062 } else if(c == '\r') {
2063 printf("(\\r)");
2064 } else if(c == 0x1b) {
2065 printf("(\\e)");
2066 } else {
2067 printf("(%02x)", c);
2068 }
2069 }
2070 putchar('\n');
2071 }
2072
2073 void
2074 csireset(void) {
2075 memset(&csiescseq, 0, sizeof(csiescseq));
2076 }
2077
2078 void
2079 strhandle(void) {
2080 char *p = NULL;
2081 int i, j, narg;
2082
2083 strparse();
2084 narg = strescseq.narg;
2085
2086 switch(strescseq.type) {
2087 case ']': /* OSC -- Operating System Command */
2088 switch(i = atoi(strescseq.args[0])) {
2089 case 0:
2090 case 1:
2091 case 2:
2092 if(narg > 1)
2093 xsettitle(strescseq.args[1]);
2094 break;
2095 case 4: /* color set */
2096 if(narg < 3)
2097 break;
2098 p = strescseq.args[2];
2099 /* fall through */
2100 case 104: /* color reset, here p = NULL */
2101 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2102 if (!xsetcolorname(j, p)) {
2103 fprintf(stderr, "erresc: invalid color %s\n", p);
2104 } else {
2105 /*
2106 * TODO if defaultbg color is changed, borders
2107 * are dirty
2108 */
2109 redraw(0);
2110 }
2111 break;
2112 default:
2113 fprintf(stderr, "erresc: unknown str ");
2114 strdump();
2115 break;
2116 }
2117 break;
2118 case 'k': /* old title set compatibility */
2119 xsettitle(strescseq.args[0]);
2120 break;
2121 case 'P': /* DSC -- Device Control String */
2122 case '_': /* APC -- Application Program Command */
2123 case '^': /* PM -- Privacy Message */
2124 default:
2125 fprintf(stderr, "erresc: unknown str ");
2126 strdump();
2127 /* die(""); */
2128 break;
2129 }
2130 }
2131
2132 void
2133 strparse(void) {
2134 char *p = strescseq.buf;
2135
2136 strescseq.narg = 0;
2137 strescseq.buf[strescseq.len] = '\0';
2138 while(p && strescseq.narg < STR_ARG_SIZ)
2139 strescseq.args[strescseq.narg++] = strsep(&p, ";");
2140 }
2141
2142 void
2143 strdump(void) {
2144 int i;
2145 uint c;
2146
2147 printf("ESC%c", strescseq.type);
2148 for(i = 0; i < strescseq.len; i++) {
2149 c = strescseq.buf[i] & 0xff;
2150 if(c == '\0') {
2151 return;
2152 } else if(isprint(c)) {
2153 putchar(c);
2154 } else if(c == '\n') {
2155 printf("(\\n)");
2156 } else if(c == '\r') {
2157 printf("(\\r)");
2158 } else if(c == 0x1b) {
2159 printf("(\\e)");
2160 } else {
2161 printf("(%02x)", c);
2162 }
2163 }
2164 printf("ESC\\\n");
2165 }
2166
2167 void
2168 strreset(void) {
2169 memset(&strescseq, 0, sizeof(strescseq));
2170 }
2171
2172 void
2173 tputtab(bool forward) {
2174 uint x = term.c.x;
2175
2176 if(forward) {
2177 if(x == term.col)
2178 return;
2179 for(++x; x < term.col && !term.tabs[x]; ++x)
2180 /* nothing */ ;
2181 } else {
2182 if(x == 0)
2183 return;
2184 for(--x; x > 0 && !term.tabs[x]; --x)
2185 /* nothing */ ;
2186 }
2187 tmoveto(x, term.c.y);
2188 }
2189
2190 void
2191 techo(char *buf, int len) {
2192 for(; len > 0; buf++, len--) {
2193 char c = *buf;
2194
2195 if(c == '\033') { /* escape */
2196 tputc("^", 1);
2197 tputc("[", 1);
2198 } else if(c < '\x20') { /* control code */
2199 if(c != '\n' && c != '\r' && c != '\t') {
2200 c |= '\x40';
2201 tputc("^", 1);
2202 }
2203 tputc(&c, 1);
2204 } else {
2205 break;
2206 }
2207 }
2208 if(len)
2209 tputc(buf, len);
2210 }
2211
2212 void
2213 tputc(char *c, int len) {
2214 uchar ascii = *c;
2215 bool control = ascii < '\x20' || ascii == 0177;
2216
2217 if(iofd != -1) {
2218 if(xwrite(iofd, c, len) < 0) {
2219 fprintf(stderr, "Error writing in %s:%s\n",
2220 opt_io, strerror(errno));
2221 close(iofd);
2222 iofd = -1;
2223 }
2224 }
2225
2226 /*
2227 * STR sequences must be checked before anything else
2228 * because it can use some control codes as part of the sequence.
2229 */
2230 if(term.esc & ESC_STR) {
2231 switch(ascii) {
2232 case '\033':
2233 term.esc = ESC_START | ESC_STR_END;
2234 break;
2235 case '\a': /* backwards compatibility to xterm */
2236 term.esc = 0;
2237 strhandle();
2238 break;
2239 default:
2240 if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2241 memmove(&strescseq.buf[strescseq.len], c, len);
2242 strescseq.len += len;
2243 } else {
2244 /*
2245 * Here is a bug in terminals. If the user never sends
2246 * some code to stop the str or esc command, then st
2247 * will stop responding. But this is better than
2248 * silently failing with unknown characters. At least
2249 * then users will report back.
2250 *
2251 * In the case users ever get fixed, here is the code:
2252 */
2253 /*
2254 * term.esc = 0;
2255 * strhandle();
2256 */
2257 }
2258 }
2259 return;
2260 }
2261
2262 /*
2263 * Actions of control codes must be performed as soon they arrive
2264 * because they can be embedded inside a control sequence, and
2265 * they must not cause conflicts with sequences.
2266 */
2267 if(control) {
2268 switch(ascii) {
2269 case '\t': /* HT */
2270 tputtab(1);
2271 return;
2272 case '\b': /* BS */
2273 tmoveto(term.c.x-1, term.c.y);
2274 return;
2275 case '\r': /* CR */
2276 tmoveto(0, term.c.y);
2277 return;
2278 case '\f': /* LF */
2279 case '\v': /* VT */
2280 case '\n': /* LF */
2281 /* go to first col if the mode is set */
2282 tnewline(IS_SET(MODE_CRLF));
2283 return;
2284 case '\a': /* BEL */
2285 if(!(xw.state & WIN_FOCUSED))
2286 xseturgency(1);
2287 return;
2288 case '\033': /* ESC */
2289 csireset();
2290 term.esc = ESC_START;
2291 return;
2292 case '\016': /* SO */
2293 case '\017': /* SI */
2294 /*
2295 * Different charsets are hard to handle. Applications
2296 * should use the right alt charset escapes for the
2297 * only reason they still exist: line drawing. The
2298 * rest is incompatible history st should not support.
2299 */
2300 return;
2301 case '\032': /* SUB */
2302 case '\030': /* CAN */
2303 csireset();
2304 return;
2305 case '\005': /* ENQ (IGNORED) */
2306 case '\000': /* NUL (IGNORED) */
2307 case '\021': /* XON (IGNORED) */
2308 case '\023': /* XOFF (IGNORED) */
2309 case 0177: /* DEL (IGNORED) */
2310 return;
2311 }
2312 } else if(term.esc & ESC_START) {
2313 if(term.esc & ESC_CSI) {
2314 csiescseq.buf[csiescseq.len++] = ascii;
2315 if(BETWEEN(ascii, 0x40, 0x7E)
2316 || csiescseq.len >= \
2317 sizeof(csiescseq.buf)-1) {
2318 term.esc = 0;
2319 csiparse();
2320 csihandle();
2321 }
2322 } else if(term.esc & ESC_STR_END) {
2323 term.esc = 0;
2324 if(ascii == '\\')
2325 strhandle();
2326 } else if(term.esc & ESC_ALTCHARSET) {
2327 switch(ascii) {
2328 case '0': /* Line drawing set */
2329 term.c.attr.mode |= ATTR_GFX;
2330 break;
2331 case 'B': /* USASCII */
2332 term.c.attr.mode &= ~ATTR_GFX;
2333 break;
2334 case 'A': /* UK (IGNORED) */
2335 case '<': /* multinational charset (IGNORED) */
2336 case '5': /* Finnish (IGNORED) */
2337 case 'C': /* Finnish (IGNORED) */
2338 case 'K': /* German (IGNORED) */
2339 break;
2340 default:
2341 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2342 }
2343 term.esc = 0;
2344 } else if(term.esc & ESC_TEST) {
2345 if(ascii == '8') { /* DEC screen alignment test. */
2346 char E[UTF_SIZ] = "E";
2347 int x, y;
2348
2349 for(x = 0; x < term.col; ++x) {
2350 for(y = 0; y < term.row; ++y)
2351 tsetchar(E, &term.c.attr, x, y);
2352 }
2353 }
2354 term.esc = 0;
2355 } else {
2356 switch(ascii) {
2357 case '[':
2358 term.esc |= ESC_CSI;
2359 break;
2360 case '#':
2361 term.esc |= ESC_TEST;
2362 break;
2363 case 'P': /* DCS -- Device Control String */
2364 case '_': /* APC -- Application Program Command */
2365 case '^': /* PM -- Privacy Message */
2366 case ']': /* OSC -- Operating System Command */
2367 case 'k': /* old title set compatibility */
2368 strreset();
2369 strescseq.type = ascii;
2370 term.esc |= ESC_STR;
2371 break;
2372 case '(': /* set primary charset G0 */
2373 term.esc |= ESC_ALTCHARSET;
2374 break;
2375 case ')': /* set secondary charset G1 (IGNORED) */
2376 case '*': /* set tertiary charset G2 (IGNORED) */
2377 case '+': /* set quaternary charset G3 (IGNORED) */
2378 term.esc = 0;
2379 break;
2380 case 'D': /* IND -- Linefeed */
2381 if(term.c.y == term.bot) {
2382 tscrollup(term.top, 1);
2383 } else {
2384 tmoveto(term.c.x, term.c.y+1);
2385 }
2386 term.esc = 0;
2387 break;
2388 case 'E': /* NEL -- Next line */
2389 tnewline(1); /* always go to first col */
2390 term.esc = 0;
2391 break;
2392 case 'H': /* HTS -- Horizontal tab stop */
2393 term.tabs[term.c.x] = 1;
2394 term.esc = 0;
2395 break;
2396 case 'M': /* RI -- Reverse index */
2397 if(term.c.y == term.top) {
2398 tscrolldown(term.top, 1);
2399 } else {
2400 tmoveto(term.c.x, term.c.y-1);
2401 }
2402 term.esc = 0;
2403 break;
2404 case 'Z': /* DECID -- Identify Terminal */
2405 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2406 term.esc = 0;
2407 break;
2408 case 'c': /* RIS -- Reset to inital state */
2409 treset();
2410 term.esc = 0;
2411 xresettitle();
2412 break;
2413 case '=': /* DECPAM -- Application keypad */
2414 term.mode |= MODE_APPKEYPAD;
2415 term.esc = 0;
2416 break;
2417 case '>': /* DECPNM -- Normal keypad */
2418 term.mode &= ~MODE_APPKEYPAD;
2419 term.esc = 0;
2420 break;
2421 case '7': /* DECSC -- Save Cursor */
2422 tcursor(CURSOR_SAVE);
2423 term.esc = 0;
2424 break;
2425 case '8': /* DECRC -- Restore Cursor */
2426 tcursor(CURSOR_LOAD);
2427 term.esc = 0;
2428 break;
2429 case '\\': /* ST -- Stop */
2430 term.esc = 0;
2431 break;
2432 default:
2433 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2434 (uchar) ascii, isprint(ascii)? ascii:'.');
2435 term.esc = 0;
2436 }
2437 }
2438 /*
2439 * All characters which form part of a sequence are not
2440 * printed
2441 */
2442 return;
2443 }
2444 /*
2445 * Display control codes only if we are in graphic mode
2446 */
2447 if(control && !(term.c.attr.mode & ATTR_GFX))
2448 return;
2449 if(sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
2450 sel.ob.x = -1;
2451 if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2452 term.line[term.c.y][term.c.x].mode |= ATTR_WRAP;
2453 tnewline(1);
2454 }
2455
2456 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col) {
2457 memmove(&term.line[term.c.y][term.c.x+1],
2458 &term.line[term.c.y][term.c.x],
2459 (term.col - term.c.x - 1) * sizeof(Glyph));
2460 }
2461
2462 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2463 if(term.c.x+1 < term.col) {
2464 tmoveto(term.c.x+1, term.c.y);
2465 } else {
2466 term.c.state |= CURSOR_WRAPNEXT;
2467 }
2468 }
2469
2470 int
2471 tresize(int col, int row) {
2472 int i;
2473 int minrow = MIN(row, term.row);
2474 int mincol = MIN(col, term.col);
2475 int slide = term.c.y - row + 1;
2476 bool *bp;
2477 Line *orig;
2478
2479 if(col < 1 || row < 1)
2480 return 0;
2481
2482 /* free unneeded rows */
2483 i = 0;
2484 if(slide > 0) {
2485 /*
2486 * slide screen to keep cursor where we expect it -
2487 * tscrollup would work here, but we can optimize to
2488 * memmove because we're freeing the earlier lines
2489 */
2490 for(/* i = 0 */; i < slide; i++) {
2491 free(term.line[i]);
2492 free(term.alt[i]);
2493 }
2494 memmove(term.line, term.line + slide, row * sizeof(Line));
2495 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2496 }
2497 for(i += row; i < term.row; i++) {
2498 free(term.line[i]);
2499 free(term.alt[i]);
2500 }
2501
2502 /* resize to new height */
2503 term.line = xrealloc(term.line, row * sizeof(Line));
2504 term.alt = xrealloc(term.alt, row * sizeof(Line));
2505 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2506 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2507
2508 /* resize each row to new width, zero-pad if needed */
2509 for(i = 0; i < minrow; i++) {
2510 term.dirty[i] = 1;
2511 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2512 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2513 }
2514
2515 /* allocate any new rows */
2516 for(/* i == minrow */; i < row; i++) {
2517 term.dirty[i] = 1;
2518 term.line[i] = xcalloc(col, sizeof(Glyph));
2519 term.alt [i] = xcalloc(col, sizeof(Glyph));
2520 }
2521 if(col > term.col) {
2522 bp = term.tabs + term.col;
2523
2524 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2525 while(--bp > term.tabs && !*bp)
2526 /* nothing */ ;
2527 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2528 *bp = 1;
2529 }
2530 /* update terminal size */
2531 term.col = col;
2532 term.row = row;
2533 /* reset scrolling region */
2534 tsetscroll(0, row-1);
2535 /* make use of the LIMIT in tmoveto */
2536 tmoveto(term.c.x, term.c.y);
2537 /* Clearing both screens */
2538 orig = term.line;
2539 do {
2540 if(mincol < col && 0 < minrow) {
2541 tclearregion(mincol, 0, col - 1, minrow - 1);
2542 }
2543 if(0 < col && minrow < row) {
2544 tclearregion(0, minrow, col - 1, row - 1);
2545 }
2546 tswapscreen();
2547 } while(orig != term.line);
2548
2549 return (slide > 0);
2550 }
2551
2552 void
2553 xresize(int col, int row) {
2554 xw.tw = MAX(1, col * xw.cw);
2555 xw.th = MAX(1, row * xw.ch);
2556
2557 XFreePixmap(xw.dpy, xw.buf);
2558 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2559 DefaultDepth(xw.dpy, xw.scr));
2560 XftDrawChange(xw.draw, xw.buf);
2561 xclear(0, 0, xw.w, xw.h);
2562 }
2563
2564 static inline ushort
2565 sixd_to_16bit(int x) {
2566 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2567 }
2568
2569 void
2570 xloadcols(void) {
2571 int i, r, g, b;
2572 XRenderColor color = { .alpha = 0xffff };
2573
2574 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
2575 for(i = 0; i < LEN(colorname); i++) {
2576 if(!colorname[i])
2577 continue;
2578 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2579 die("Could not allocate color '%s'\n", colorname[i]);
2580 }
2581 }
2582
2583 /* load colors [16-255] ; same colors as xterm */
2584 for(i = 16, r = 0; r < 6; r++) {
2585 for(g = 0; g < 6; g++) {
2586 for(b = 0; b < 6; b++) {
2587 color.red = sixd_to_16bit(r);
2588 color.green = sixd_to_16bit(g);
2589 color.blue = sixd_to_16bit(b);
2590 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i])) {
2591 die("Could not allocate color %d\n", i);
2592 }
2593 i++;
2594 }
2595 }
2596 }
2597
2598 for(r = 0; r < 24; r++, i++) {
2599 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
2600 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color,
2601 &dc.col[i])) {
2602 die("Could not allocate color %d\n", i);
2603 }
2604 }
2605 }
2606
2607 int
2608 xsetcolorname(int x, const char *name) {
2609 XRenderColor color = { .alpha = 0xffff };
2610 Colour colour;
2611 if (x < 0 || x > LEN(colorname))
2612 return -1;
2613 if(!name) {
2614 if(16 <= x && x < 16 + 216) {
2615 int r = (x - 16) / 36, g = ((x - 16) % 36) / 6, b = (x - 16) % 6;
2616 color.red = sixd_to_16bit(r);
2617 color.green = sixd_to_16bit(g);
2618 color.blue = sixd_to_16bit(b);
2619 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2620 return 0; /* something went wrong */
2621 dc.col[x] = colour;
2622 return 1;
2623 } else if (16 + 216 <= x && x < 256) {
2624 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (x - (16 + 216));
2625 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2626 return 0; /* something went wrong */
2627 dc.col[x] = colour;
2628 return 1;
2629 } else {
2630 name = colorname[x];
2631 }
2632 }
2633 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &colour))
2634 return 0;
2635 dc.col[x] = colour;
2636 return 1;
2637 }
2638
2639 void
2640 xtermclear(int col1, int row1, int col2, int row2) {
2641 XftDrawRect(xw.draw,
2642 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2643 borderpx + col1 * xw.cw,
2644 borderpx + row1 * xw.ch,
2645 (col2-col1+1) * xw.cw,
2646 (row2-row1+1) * xw.ch);
2647 }
2648
2649 /*
2650 * Absolute coordinates.
2651 */
2652 void
2653 xclear(int x1, int y1, int x2, int y2) {
2654 XftDrawRect(xw.draw,
2655 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2656 x1, y1, x2-x1, y2-y1);
2657 }
2658
2659 void
2660 xhints(void) {
2661 XClassHint class = {opt_class ? opt_class : termname, termname};
2662 XWMHints wm = {.flags = InputHint, .input = 1};
2663 XSizeHints *sizeh = NULL;
2664
2665 sizeh = XAllocSizeHints();
2666 if(xw.isfixed == False) {
2667 sizeh->flags = PSize | PResizeInc | PBaseSize;
2668 sizeh->height = xw.h;
2669 sizeh->width = xw.w;
2670 sizeh->height_inc = xw.ch;
2671 sizeh->width_inc = xw.cw;
2672 sizeh->base_height = 2 * borderpx;
2673 sizeh->base_width = 2 * borderpx;
2674 } else {
2675 sizeh->flags = PMaxSize | PMinSize;
2676 sizeh->min_width = sizeh->max_width = xw.fw;
2677 sizeh->min_height = sizeh->max_height = xw.fh;
2678 }
2679
2680 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
2681 XFree(sizeh);
2682 }
2683
2684 int
2685 xloadfont(Font *f, FcPattern *pattern) {
2686 FcPattern *match;
2687 FcResult result;
2688
2689 match = FcFontMatch(NULL, pattern, &result);
2690 if(!match)
2691 return 1;
2692
2693 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2694 FcPatternDestroy(match);
2695 return 1;
2696 }
2697
2698 f->set = NULL;
2699 f->pattern = FcPatternDuplicate(pattern);
2700
2701 f->ascent = f->match->ascent;
2702 f->descent = f->match->descent;
2703 f->lbearing = 0;
2704 f->rbearing = f->match->max_advance_width;
2705
2706 f->height = f->ascent + f->descent;
2707 f->width = f->lbearing + f->rbearing;
2708
2709 return 0;
2710 }
2711
2712 void
2713 xloadfonts(char *fontstr, int fontsize) {
2714 FcPattern *pattern;
2715 FcResult result;
2716 double fontval;
2717
2718 if(fontstr[0] == '-') {
2719 pattern = XftXlfdParse(fontstr, False, False);
2720 } else {
2721 pattern = FcNameParse((FcChar8 *)fontstr);
2722 }
2723
2724 if(!pattern)
2725 die("st: can't open font %s\n", fontstr);
2726
2727 if(fontsize > 0) {
2728 FcPatternDel(pattern, FC_PIXEL_SIZE);
2729 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2730 usedfontsize = fontsize;
2731 } else {
2732 result = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2733 if(result == FcResultMatch) {
2734 usedfontsize = (int)fontval;
2735 } else {
2736 /*
2737 * Default font size is 12, if none given. This is to
2738 * have a known usedfontsize value.
2739 */
2740 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
2741 usedfontsize = 12;
2742 }
2743 }
2744
2745 FcConfigSubstitute(0, pattern, FcMatchPattern);
2746 FcDefaultSubstitute(pattern);
2747
2748 if(xloadfont(&dc.font, pattern))
2749 die("st: can't open font %s\n", fontstr);
2750
2751 /* Setting character width and height. */
2752 xw.cw = dc.font.width;
2753 xw.ch = dc.font.height;
2754
2755 FcPatternDel(pattern, FC_SLANT);
2756 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
2757 if(xloadfont(&dc.ifont, pattern))
2758 die("st: can't open font %s\n", fontstr);
2759
2760 FcPatternDel(pattern, FC_WEIGHT);
2761 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
2762 if(xloadfont(&dc.ibfont, pattern))
2763 die("st: can't open font %s\n", fontstr);
2764
2765 FcPatternDel(pattern, FC_SLANT);
2766 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
2767 if(xloadfont(&dc.bfont, pattern))
2768 die("st: can't open font %s\n", fontstr);
2769
2770 FcPatternDestroy(pattern);
2771 }
2772
2773 int
2774 xloadfontset(Font *f) {
2775 FcResult result;
2776
2777 if(!(f->set = FcFontSort(0, f->pattern, FcTrue, 0, &result)))
2778 return 1;
2779 return 0;
2780 }
2781
2782 void
2783 xunloadfont(Font *f) {
2784 XftFontClose(xw.dpy, f->match);
2785 FcPatternDestroy(f->pattern);
2786 if(f->set)
2787 FcFontSetDestroy(f->set);
2788 }
2789
2790 void
2791 xunloadfonts(void) {
2792 int i, ip;
2793
2794 /*
2795 * Free the loaded fonts in the font cache. This is done backwards
2796 * from the frccur.
2797 */
2798 for(i = 0, ip = frccur; i < frclen; i++, ip--) {
2799 if(ip < 0)
2800 ip = LEN(frc) - 1;
2801 XftFontClose(xw.dpy, frc[ip].font);
2802 }
2803 frccur = -1;
2804 frclen = 0;
2805
2806 xunloadfont(&dc.font);
2807 xunloadfont(&dc.bfont);
2808 xunloadfont(&dc.ifont);
2809 xunloadfont(&dc.ibfont);
2810 }
2811
2812 void
2813 xzoom(const Arg *arg) {
2814 xunloadfonts();
2815 xloadfonts(usedfont, usedfontsize + arg->i);
2816 cresize(0, 0);
2817 redraw(0);
2818 }
2819
2820 void
2821 xinit(void) {
2822 XGCValues gcvalues;
2823 Cursor cursor;
2824 Window parent;
2825 int sw, sh;
2826
2827 if(!(xw.dpy = XOpenDisplay(NULL)))
2828 die("Can't open display\n");
2829 xw.scr = XDefaultScreen(xw.dpy);
2830 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
2831
2832 /* font */
2833 if(!FcInit())
2834 die("Could not init fontconfig.\n");
2835
2836 usedfont = (opt_font == NULL)? font : opt_font;
2837 xloadfonts(usedfont, 0);
2838
2839 /* colors */
2840 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
2841 xloadcols();
2842
2843 /* adjust fixed window geometry */
2844 if(xw.isfixed) {
2845 sw = DisplayWidth(xw.dpy, xw.scr);
2846 sh = DisplayHeight(xw.dpy, xw.scr);
2847 if(xw.fx < 0)
2848 xw.fx = sw + xw.fx - xw.fw - 1;
2849 if(xw.fy < 0)
2850 xw.fy = sh + xw.fy - xw.fh - 1;
2851
2852 xw.h = xw.fh;
2853 xw.w = xw.fw;
2854 } else {
2855 /* window - default size */
2856 xw.h = 2 * borderpx + term.row * xw.ch;
2857 xw.w = 2 * borderpx + term.col * xw.cw;
2858 xw.fx = 0;
2859 xw.fy = 0;
2860 }
2861
2862 /* Events */
2863 xw.attrs.background_pixel = dc.col[defaultbg].pixel;
2864 xw.attrs.border_pixel = dc.col[defaultbg].pixel;
2865 xw.attrs.bit_gravity = NorthWestGravity;
2866 xw.attrs.event_mask = FocusChangeMask | KeyPressMask
2867 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
2868 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
2869 xw.attrs.colormap = xw.cmap;
2870
2871 parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
2872 XRootWindow(xw.dpy, xw.scr);
2873 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
2874 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
2875 xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
2876 | CWEventMask | CWColormap, &xw.attrs);
2877
2878 memset(&gcvalues, 0, sizeof(gcvalues));
2879 gcvalues.graphics_exposures = False;
2880 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
2881 &gcvalues);
2882 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2883 DefaultDepth(xw.dpy, xw.scr));
2884 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
2885 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
2886
2887 /* Xft rendering context */
2888 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
2889
2890 /* input methods */
2891 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2892 XSetLocaleModifiers("@im=local");
2893 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2894 XSetLocaleModifiers("@im=");
2895 if((xw.xim = XOpenIM(xw.dpy,
2896 NULL, NULL, NULL)) == NULL) {
2897 die("XOpenIM failed. Could not open input"
2898 " device.\n");
2899 }
2900 }
2901 }
2902 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
2903 | XIMStatusNothing, XNClientWindow, xw.win,
2904 XNFocusWindow, xw.win, NULL);
2905 if(xw.xic == NULL)
2906 die("XCreateIC failed. Could not obtain input method.\n");
2907
2908 /* white cursor, black outline */
2909 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
2910 XDefineCursor(xw.dpy, xw.win, cursor);
2911 XRecolorCursor(xw.dpy, cursor,
2912 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
2913 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
2914
2915 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
2916 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
2917 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
2918
2919 xresettitle();
2920 XMapWindow(xw.dpy, xw.win);
2921 xhints();
2922 XSync(xw.dpy, 0);
2923 }
2924
2925 void
2926 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
2927 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
2928 width = charlen * xw.cw, xp, i;
2929 int frp, frcflags;
2930 int u8fl, u8fblen, u8cblen, doesexist;
2931 char *u8c, *u8fs;
2932 long u8char;
2933 Font *font = &dc.font;
2934 FcResult fcres;
2935 FcPattern *fcpattern, *fontpattern;
2936 FcFontSet *fcsets[] = { NULL };
2937 FcCharSet *fccharset;
2938 Colour *fg, *bg, *temp, revfg, revbg;
2939 XRenderColor colfg, colbg;
2940 Rectangle r;
2941
2942 frcflags = FRC_NORMAL;
2943
2944 if(base.mode & ATTR_ITALIC) {
2945 if(base.fg == defaultfg)
2946 base.fg = defaultitalic;
2947 font = &dc.ifont;
2948 frcflags = FRC_ITALIC;
2949 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
2950 if(base.fg == defaultfg)
2951 base.fg = defaultitalic;
2952 font = &dc.ibfont;
2953 frcflags = FRC_ITALICBOLD;
2954 } else if(base.mode & ATTR_UNDERLINE) {
2955 if(base.fg == defaultfg)
2956 base.fg = defaultunderline;
2957 }
2958 fg = &dc.col[base.fg];
2959 bg = &dc.col[base.bg];
2960
2961 if(base.mode & ATTR_BOLD) {
2962 if(BETWEEN(base.fg, 0, 7)) {
2963 /* basic system colors */
2964 fg = &dc.col[base.fg + 8];
2965 } else if(BETWEEN(base.fg, 16, 195)) {
2966 /* 256 colors */
2967 fg = &dc.col[base.fg + 36];
2968 } else if(BETWEEN(base.fg, 232, 251)) {
2969 /* greyscale */
2970 fg = &dc.col[base.fg + 4];
2971 }
2972 /*
2973 * Those ranges will not be brightened:
2974 * 8 - 15 – bright system colors
2975 * 196 - 231 – highest 256 color cube
2976 * 252 - 255 – brightest colors in greyscale
2977 */
2978 font = &dc.bfont;
2979 frcflags = FRC_BOLD;
2980 }
2981
2982 if(IS_SET(MODE_REVERSE)) {
2983 if(fg == &dc.col[defaultfg]) {
2984 fg = &dc.col[defaultbg];
2985 } else {
2986 colfg.red = ~fg->color.red;
2987 colfg.green = ~fg->color.green;
2988 colfg.blue = ~fg->color.blue;
2989 colfg.alpha = fg->color.alpha;
2990 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
2991 fg = &revfg;
2992 }
2993
2994 if(bg == &dc.col[defaultbg]) {
2995 bg = &dc.col[defaultfg];
2996 } else {
2997 colbg.red = ~bg->color.red;
2998 colbg.green = ~bg->color.green;
2999 colbg.blue = ~bg->color.blue;
3000 colbg.alpha = bg->color.alpha;
3001 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &revbg);
3002 bg = &revbg;
3003 }
3004 }
3005
3006 if(base.mode & ATTR_REVERSE) {
3007 temp = fg;
3008 fg = bg;
3009 bg = temp;
3010 }
3011
3012 if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
3013 fg = bg;
3014
3015 /* Intelligent cleaning up of the borders. */
3016 if(x == 0) {
3017 xclear(0, (y == 0)? 0 : winy, borderpx,
3018 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
3019 }
3020 if(x + charlen >= term.col) {
3021 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
3022 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
3023 }
3024 if(y == 0)
3025 xclear(winx, 0, winx + width, borderpx);
3026 if(y == term.row-1)
3027 xclear(winx, winy + xw.ch, winx + width, xw.h);
3028
3029 /* Clean up the region we want to draw to. */
3030 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
3031
3032 /* Set the clip region because Xft is sometimes dirty. */
3033 r.x = 0;
3034 r.y = 0;
3035 r.height = xw.ch;
3036 r.width = width;
3037 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
3038
3039 for(xp = winx; bytelen > 0;) {
3040 /*
3041 * Search for the range in the to be printed string of glyphs
3042 * that are in the main font. Then print that range. If
3043 * some glyph is found that is not in the font, do the
3044 * fallback dance.
3045 */
3046 u8fs = s;
3047 u8fblen = 0;
3048 u8fl = 0;
3049 for(;;) {
3050 u8c = s;
3051 u8cblen = utf8decode(s, &u8char);
3052 s += u8cblen;
3053 bytelen -= u8cblen;
3054
3055 doesexist = XftCharIndex(xw.dpy, font->match, u8char);
3056 if(!doesexist || bytelen <= 0) {
3057 if(bytelen <= 0) {
3058 if(doesexist) {
3059 u8fl++;
3060 u8fblen += u8cblen;
3061 }
3062 }
3063
3064 if(u8fl > 0) {
3065 XftDrawStringUtf8(xw.draw, fg,
3066 font->match, xp,
3067 winy + font->ascent,
3068 (FcChar8 *)u8fs,
3069 u8fblen);
3070 xp += font->width * u8fl;
3071
3072 }
3073 break;
3074 }
3075
3076 u8fl++;
3077 u8fblen += u8cblen;
3078 }
3079 if(doesexist)
3080 break;
3081
3082 frp = frccur;
3083 /* Search the font cache. */
3084 for(i = 0; i < frclen; i++, frp--) {
3085 if(frp <= 0)
3086 frp = LEN(frc) - 1;
3087
3088 if(frc[frp].c == u8char
3089 && frc[frp].flags == frcflags) {
3090 break;
3091 }
3092 }
3093
3094 /* Nothing was found. */
3095 if(i >= frclen) {
3096 if(!font->set)
3097 xloadfontset(font);
3098 fcsets[0] = font->set;
3099
3100 /*
3101 * Nothing was found in the cache. Now use
3102 * some dozen of Fontconfig calls to get the
3103 * font for one single character.
3104 */
3105 fcpattern = FcPatternDuplicate(font->pattern);
3106 fccharset = FcCharSetCreate();
3107
3108 FcCharSetAddChar(fccharset, u8char);
3109 FcPatternAddCharSet(fcpattern, FC_CHARSET,
3110 fccharset);
3111 FcPatternAddBool(fcpattern, FC_SCALABLE,
3112 FcTrue);
3113
3114 FcConfigSubstitute(0, fcpattern,
3115 FcMatchPattern);
3116 FcDefaultSubstitute(fcpattern);
3117
3118 fontpattern = FcFontSetMatch(0, fcsets,
3119 FcTrue, fcpattern, &fcres);
3120
3121 /*
3122 * Overwrite or create the new cache entry.
3123 */
3124 frccur++;
3125 frclen++;
3126 if(frccur >= LEN(frc))
3127 frccur = 0;
3128 if(frclen > LEN(frc)) {
3129 frclen = LEN(frc);
3130 XftFontClose(xw.dpy, frc[frccur].font);
3131 }
3132
3133 frc[frccur].font = XftFontOpenPattern(xw.dpy,
3134 fontpattern);
3135 frc[frccur].c = u8char;
3136 frc[frccur].flags = frcflags;
3137
3138 FcPatternDestroy(fcpattern);
3139 FcCharSetDestroy(fccharset);
3140
3141 frp = frccur;
3142 }
3143
3144 XftDrawStringUtf8(xw.draw, fg, frc[frp].font,
3145 xp, winy + frc[frp].font->ascent,
3146 (FcChar8 *)u8c, u8cblen);
3147
3148 xp += font->width;
3149 }
3150
3151 /*
3152 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
3153 winy + font->ascent, (FcChar8 *)s, bytelen);
3154 */
3155
3156 if(base.mode & ATTR_UNDERLINE) {
3157 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
3158 width, 1);
3159 }
3160
3161 /* Reset clip to none. */
3162 XftDrawSetClip(xw.draw, 0);
3163 }
3164
3165 void
3166 xdrawcursor(void) {
3167 static int oldx = 0, oldy = 0;
3168 int sl;
3169 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
3170
3171 LIMIT(oldx, 0, term.col-1);
3172 LIMIT(oldy, 0, term.row-1);
3173
3174 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
3175
3176 /* remove the old cursor */
3177 sl = utf8size(term.line[oldy][oldx].c);
3178 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
3179 oldy, 1, sl);
3180
3181 /* draw the new one */
3182 if(!(IS_SET(MODE_HIDE))) {
3183 if(xw.state & WIN_FOCUSED) {
3184 if(IS_SET(MODE_REVERSE)) {
3185 g.mode |= ATTR_REVERSE;
3186 g.fg = defaultcs;
3187 g.bg = defaultfg;
3188 }
3189
3190 sl = utf8size(g.c);
3191 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
3192 } else {
3193 XftDrawRect(xw.draw, &dc.col[defaultcs],
3194 borderpx + term.c.x * xw.cw,
3195 borderpx + term.c.y * xw.ch,
3196 xw.cw - 1, 1);
3197 XftDrawRect(xw.draw, &dc.col[defaultcs],
3198 borderpx + term.c.x * xw.cw,
3199 borderpx + term.c.y * xw.ch,
3200 1, xw.ch - 1);
3201 XftDrawRect(xw.draw, &dc.col[defaultcs],
3202 borderpx + (term.c.x + 1) * xw.cw - 1,
3203 borderpx + term.c.y * xw.ch,
3204 1, xw.ch - 1);
3205 XftDrawRect(xw.draw, &dc.col[defaultcs],
3206 borderpx + term.c.x * xw.cw,
3207 borderpx + (term.c.y + 1) * xw.ch - 1,
3208 xw.cw, 1);
3209 }
3210 oldx = term.c.x, oldy = term.c.y;
3211 }
3212 }
3213
3214
3215 void
3216 xsettitle(char *p) {
3217 XTextProperty prop;
3218
3219 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3220 &prop);
3221 XSetWMName(xw.dpy, xw.win, &prop);
3222 }
3223
3224 void
3225 xresettitle(void) {
3226 xsettitle(opt_title ? opt_title : "st");
3227 }
3228
3229 void
3230 redraw(int timeout) {
3231 struct timespec tv = {0, timeout * 1000};
3232
3233 tfulldirt();
3234 draw();
3235
3236 if(timeout > 0) {
3237 nanosleep(&tv, NULL);
3238 XSync(xw.dpy, False); /* necessary for a good tput flash */
3239 }
3240 }
3241
3242 void
3243 draw(void) {
3244 drawregion(0, 0, term.col, term.row);
3245 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3246 xw.h, 0, 0);
3247 XSetForeground(xw.dpy, dc.gc,
3248 dc.col[IS_SET(MODE_REVERSE)?
3249 defaultfg : defaultbg].pixel);
3250 }
3251
3252 void
3253 drawregion(int x1, int y1, int x2, int y2) {
3254 int ic, ib, x, y, ox, sl;
3255 Glyph base, new;
3256 char buf[DRAW_BUF_SIZ];
3257 bool ena_sel = sel.ob.x != -1;
3258
3259 if(sel.alt ^ IS_SET(MODE_ALTSCREEN))
3260 ena_sel = 0;
3261
3262 if(!(xw.state & WIN_VISIBLE))
3263 return;
3264
3265 for(y = y1; y < y2; y++) {
3266 if(!term.dirty[y])
3267 continue;
3268
3269 xtermclear(0, y, term.col, y);
3270 term.dirty[y] = 0;
3271 base = term.line[y][0];
3272 ic = ib = ox = 0;
3273 for(x = x1; x < x2; x++) {
3274 new = term.line[y][x];
3275 if(ena_sel && selected(x, y))
3276 new.mode ^= ATTR_REVERSE;
3277 if(ib > 0 && (ATTRCMP(base, new)
3278 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3279 xdraws(buf, base, ox, y, ic, ib);
3280 ic = ib = 0;
3281 }
3282 if(ib == 0) {
3283 ox = x;
3284 base = new;
3285 }
3286
3287 sl = utf8size(new.c);
3288 memcpy(buf+ib, new.c, sl);
3289 ib += sl;
3290 ++ic;
3291 }
3292 if(ib > 0)
3293 xdraws(buf, base, ox, y, ic, ib);
3294 }
3295 xdrawcursor();
3296 }
3297
3298 void
3299 expose(XEvent *ev) {
3300 XExposeEvent *e = &ev->xexpose;
3301
3302 if(xw.state & WIN_REDRAW) {
3303 if(!e->count)
3304 xw.state &= ~WIN_REDRAW;
3305 }
3306 redraw(0);
3307 }
3308
3309 void
3310 visibility(XEvent *ev) {
3311 XVisibilityEvent *e = &ev->xvisibility;
3312
3313 if(e->state == VisibilityFullyObscured) {
3314 xw.state &= ~WIN_VISIBLE;
3315 } else if(!(xw.state & WIN_VISIBLE)) {
3316 /* need a full redraw for next Expose, not just a buf copy */
3317 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3318 }
3319 }
3320
3321 void
3322 unmap(XEvent *ev) {
3323 xw.state &= ~WIN_VISIBLE;
3324 }
3325
3326 void
3327 xsetpointermotion(int set) {
3328 MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
3329 XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
3330 }
3331
3332 void
3333 xseturgency(int add) {
3334 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3335
3336 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
3337 XSetWMHints(xw.dpy, xw.win, h);
3338 XFree(h);
3339 }
3340
3341 void
3342 focus(XEvent *ev) {
3343 XFocusChangeEvent *e = &ev->xfocus;
3344
3345 if(e->mode == NotifyGrab)
3346 return;
3347
3348 if(ev->type == FocusIn) {
3349 XSetICFocus(xw.xic);
3350 xw.state |= WIN_FOCUSED;
3351 xseturgency(0);
3352 if(IS_SET(MODE_FOCUS))
3353 ttywrite("\033[I", 3);
3354 } else {
3355 XUnsetICFocus(xw.xic);
3356 xw.state &= ~WIN_FOCUSED;
3357 if(IS_SET(MODE_FOCUS))
3358 ttywrite("\033[O", 3);
3359 }
3360 }
3361
3362 inline bool
3363 match(uint mask, uint state) {
3364 state &= ~(ignoremod);
3365
3366 if(mask == XK_NO_MOD && state)
3367 return false;
3368 if(mask != XK_ANY_MOD && mask != XK_NO_MOD && !state)
3369 return false;
3370 if((state & mask) != state)
3371 return false;
3372 return true;
3373 }
3374
3375 void
3376 numlock(const Arg *dummy) {
3377 term.numlock ^= 1;
3378 }
3379
3380 char*
3381 kmap(KeySym k, uint state) {
3382 uint mask;
3383 Key *kp;
3384 int i;
3385
3386 /* Check for mapped keys out of X11 function keys. */
3387 for(i = 0; i < LEN(mappedkeys); i++) {
3388 if(mappedkeys[i] == k)
3389 break;
3390 }
3391 if(i == LEN(mappedkeys)) {
3392 if((k & 0xFFFF) < 0xFD00)
3393 return NULL;
3394 }
3395
3396 for(kp = key; kp < key + LEN(key); kp++) {
3397 mask = kp->mask;
3398
3399 if(kp->k != k)
3400 continue;
3401
3402 if(!match(mask, state))
3403 continue;
3404
3405 if(kp->appkey > 0) {
3406 if(!IS_SET(MODE_APPKEYPAD))
3407 continue;
3408 if(term.numlock && kp->appkey == 2)
3409 continue;
3410 } else if(kp->appkey < 0 && IS_SET(MODE_APPKEYPAD)) {
3411 continue;
3412 }
3413
3414 if((kp->appcursor < 0 && IS_SET(MODE_APPCURSOR)) ||
3415 (kp->appcursor > 0
3416 && !IS_SET(MODE_APPCURSOR))) {
3417 continue;
3418 }
3419
3420 if((kp->crlf < 0 && IS_SET(MODE_CRLF)) ||
3421 (kp->crlf > 0 && !IS_SET(MODE_CRLF))) {
3422 continue;
3423 }
3424
3425 return kp->s;
3426 }
3427
3428 return NULL;
3429 }
3430
3431 void
3432 kpress(XEvent *ev) {
3433 XKeyEvent *e = &ev->xkey;
3434 KeySym ksym;
3435 char xstr[31], buf[32], *customkey, *cp = buf;
3436 int len, ret;
3437 long c;
3438 Status status;
3439 Shortcut *bp;
3440
3441 if(IS_SET(MODE_KBDLOCK))
3442 return;
3443
3444 len = XmbLookupString(xw.xic, e, xstr, sizeof(xstr), &ksym, &status);
3445 e->state &= ~Mod2Mask;
3446 /* 1. shortcuts */
3447 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3448 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3449 bp->func(&(bp->arg));
3450 return;
3451 }
3452 }
3453
3454 /* 2. custom keys from config.h */
3455 if((customkey = kmap(ksym, e->state))) {
3456 len = strlen(customkey);
3457 memcpy(buf, customkey, len);
3458 /* 3. hardcoded (overrides X lookup) */
3459 } else {
3460 if(len == 0)
3461 return;
3462
3463 if(len == 1 && e->state & Mod1Mask) {
3464 if(IS_SET(MODE_8BIT)) {
3465 if(*xstr < 0177) {
3466 c = *xstr | B7;
3467 ret = utf8encode(&c, cp);
3468 cp += ret;
3469 len = 0;
3470 }
3471 } else {
3472 *cp++ = '\033';
3473 }
3474 }
3475
3476 memcpy(cp, xstr, len);
3477 len = cp - buf + len;
3478 }
3479
3480 ttywrite(buf, len);
3481 if(IS_SET(MODE_ECHO))
3482 techo(buf, len);
3483 }
3484
3485
3486 void
3487 cmessage(XEvent *e) {
3488 /*
3489 * See xembed specs
3490 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3491 */
3492 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3493 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3494 xw.state |= WIN_FOCUSED;
3495 xseturgency(0);
3496 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3497 xw.state &= ~WIN_FOCUSED;
3498 }
3499 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3500 /* Send SIGHUP to shell */
3501 kill(pid, SIGHUP);
3502 exit(EXIT_SUCCESS);
3503 }
3504 }
3505
3506 void
3507 cresize(int width, int height) {
3508 int col, row;
3509
3510 if(width != 0)
3511 xw.w = width;
3512 if(height != 0)
3513 xw.h = height;
3514
3515 col = (xw.w - 2 * borderpx) / xw.cw;
3516 row = (xw.h - 2 * borderpx) / xw.ch;
3517
3518 tresize(col, row);
3519 xresize(col, row);
3520 ttyresize();
3521 }
3522
3523 void
3524 resize(XEvent *e) {
3525 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3526 return;
3527
3528 cresize(e->xconfigure.width, e->xconfigure.height);
3529 }
3530
3531 void
3532 run(void) {
3533 XEvent ev;
3534 fd_set rfd;
3535 int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3536 struct timeval drawtimeout, *tv = NULL, now, last, lastblink;
3537
3538 gettimeofday(&lastblink, NULL);
3539 gettimeofday(&last, NULL);
3540
3541 for(xev = actionfps;;) {
3542 FD_ZERO(&rfd);
3543 FD_SET(cmdfd, &rfd);
3544 FD_SET(xfd, &rfd);
3545
3546 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
3547 if(errno == EINTR)
3548 continue;
3549 die("select failed: %s\n", SERRNO);
3550 }
3551 if(FD_ISSET(cmdfd, &rfd)) {
3552 ttyread();
3553 if(blinktimeout) {
3554 blinkset = tattrset(ATTR_BLINK);
3555 if(!blinkset && term.mode & ATTR_BLINK)
3556 term.mode &= ~(MODE_BLINK);
3557 }
3558 }
3559
3560 if(FD_ISSET(xfd, &rfd))
3561 xev = actionfps;
3562
3563 gettimeofday(&now, NULL);
3564 drawtimeout.tv_sec = 0;
3565 drawtimeout.tv_usec = (1000/xfps) * 1000;
3566 tv = &drawtimeout;
3567
3568 dodraw = 0;
3569 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
3570 tsetdirtattr(ATTR_BLINK);
3571 term.mode ^= MODE_BLINK;
3572 gettimeofday(&lastblink, NULL);
3573 dodraw = 1;
3574 }
3575 if(TIMEDIFF(now, last) \
3576 > (xev? (1000/xfps) : (1000/actionfps))) {
3577 dodraw = 1;
3578 last = now;
3579 }
3580
3581 if(dodraw) {
3582 while(XPending(xw.dpy)) {
3583 XNextEvent(xw.dpy, &ev);
3584 if(XFilterEvent(&ev, None))
3585 continue;
3586 if(handler[ev.type])
3587 (handler[ev.type])(&ev);
3588 }
3589
3590 draw();
3591 XFlush(xw.dpy);
3592
3593 if(xev && !FD_ISSET(xfd, &rfd))
3594 xev--;
3595 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
3596 if(blinkset) {
3597 if(TIMEDIFF(now, lastblink) \
3598 > blinktimeout) {
3599 drawtimeout.tv_usec = 1;
3600 } else {
3601 drawtimeout.tv_usec = (1000 * \
3602 (blinktimeout - \
3603 TIMEDIFF(now,
3604 lastblink)));
3605 }
3606 } else {
3607 tv = NULL;
3608 }
3609 }
3610 }
3611 }
3612 }
3613
3614 void
3615 usage(void) {
3616 die("%s " VERSION " (c) 2010-2013 st engineers\n" \
3617 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]" \
3618 " [-t title] [-w windowid] [-e command ...]\n", argv0);
3619 }
3620
3621 int
3622 main(int argc, char *argv[]) {
3623 int bitm, xr, yr;
3624 uint wr, hr;
3625
3626 xw.fw = xw.fh = xw.fx = xw.fy = 0;
3627 xw.isfixed = False;
3628
3629 ARGBEGIN {
3630 case 'a':
3631 allowaltscreen = false;
3632 break;
3633 case 'c':
3634 opt_class = EARGF(usage());
3635 break;
3636 case 'e':
3637 /* eat all remaining arguments */
3638 if(argc > 1)
3639 opt_cmd = &argv[1];
3640 goto run;
3641 case 'f':
3642 opt_font = EARGF(usage());
3643 break;
3644 case 'g':
3645 bitm = XParseGeometry(EARGF(usage()), &xr, &yr, &wr, &hr);
3646 if(bitm & XValue)
3647 xw.fx = xr;
3648 if(bitm & YValue)
3649 xw.fy = yr;
3650 if(bitm & WidthValue)
3651 xw.fw = (int)wr;
3652 if(bitm & HeightValue)
3653 xw.fh = (int)hr;
3654 if(bitm & XNegative && xw.fx == 0)
3655 xw.fx = -1;
3656 if(bitm & XNegative && xw.fy == 0)
3657 xw.fy = -1;
3658
3659 if(xw.fh != 0 && xw.fw != 0)
3660 xw.isfixed = True;
3661 break;
3662 case 'o':
3663 opt_io = EARGF(usage());
3664 break;
3665 case 't':
3666 opt_title = EARGF(usage());
3667 break;
3668 case 'w':
3669 opt_embed = EARGF(usage());
3670 break;
3671 case 'v':
3672 default:
3673 usage();
3674 } ARGEND;
3675
3676 run:
3677 setlocale(LC_CTYPE, "");
3678 XSetLocaleModifiers("");
3679 tnew(80, 24);
3680 xinit();
3681 ttynew();
3682 selinit();
3683 if(xw.isfixed)
3684 cresize(xw.h, xw.w);
3685 run();
3686
3687 return 0;
3688 }
3689