Xinqi Bao's Git

projects / st.git / blob
summary | log | commit | diff | tree
history | raw | HEAD
Fix match function bugs
[st.git] / st.c
1 /* See LICENSE for licence details. */
2 #include <ctype.h>
3 #include <errno.h>
4 #include <fcntl.h>
5 #include <limits.h>
6 #include <locale.h>
7 #include <pwd.h>
8 #include <stdarg.h>
9 #include <stdbool.h>
10 #include <stdio.h>
11 #include <stdlib.h>
12 #include <string.h>
13 #include <signal.h>
14 #include <sys/ioctl.h>
15 #include <sys/select.h>
16 #include <sys/stat.h>
17 #include <sys/time.h>
18 #include <sys/types.h>
19 #include <sys/wait.h>
20 #include <time.h>
21 #include <unistd.h>
22 #include <libgen.h>
23 #include <X11/Xatom.h>
24 #include <X11/Xlib.h>
25 #include <X11/Xutil.h>
26 #include <X11/cursorfont.h>
27 #include <X11/keysym.h>
28 #include <X11/Xft/Xft.h>
29 #include <fontconfig/fontconfig.h>
30
31 #include "arg.h"
32
33 char *argv0;
34
35 #define Glyph Glyph_
36 #define Font Font_
37 #define Draw XftDraw *
38 #define Colour XftColor
39 #define Colourmap Colormap
40 #define Rectangle XRectangle
41
42 #if defined(__linux)
43 #include <pty.h>
44 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
45 #include <util.h>
46 #elif defined(__FreeBSD__) || defined(__DragonFly__)
47 #include <libutil.h>
48 #endif
49
50
51 /* XEMBED messages */
52 #define XEMBED_FOCUS_IN 4
53 #define XEMBED_FOCUS_OUT 5
54
55 /* Arbitrary sizes */
56 #define UTF_SIZ 4
57 #define ESC_BUF_SIZ (128*UTF_SIZ)
58 #define ESC_ARG_SIZ 16
59 #define STR_BUF_SIZ ESC_BUF_SIZ
60 #define STR_ARG_SIZ ESC_ARG_SIZ
61 #define DRAW_BUF_SIZ 20*1024
62 #define XK_ANY_MOD UINT_MAX
63 #define XK_NO_MOD 0
64 #define XK_SWITCH_MOD (1<<13)
65
66 #define REDRAW_TIMEOUT (80*1000) /* 80 ms */
67
68 /* macros */
69 #define SERRNO strerror(errno)
70 #define MIN(a, b) ((a) < (b) ? (a) : (b))
71 #define MAX(a, b) ((a) < (b) ? (b) : (a))
72 #define LEN(a) (sizeof(a) / sizeof(a[0]))
73 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
74 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
75 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
76 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
77 #define IS_SET(flag) ((term.mode & (flag)) != 0)
78 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_usec-t2.tv_usec)/1000)
79
80 #define VT102ID "\033[?6c"
81
82 enum glyph_attribute {
83 ATTR_NULL = 0,
84 ATTR_REVERSE = 1,
85 ATTR_UNDERLINE = 2,
86 ATTR_BOLD = 4,
87 ATTR_GFX = 8,
88 ATTR_ITALIC = 16,
89 ATTR_BLINK = 32,
90 ATTR_WRAP = 64,
91 };
92
93 enum cursor_movement {
94 CURSOR_SAVE,
95 CURSOR_LOAD
96 };
97
98 enum cursor_state {
99 CURSOR_DEFAULT = 0,
100 CURSOR_WRAPNEXT = 1,
101 CURSOR_ORIGIN = 2
102 };
103
104 enum term_mode {
105 MODE_WRAP = 1,
106 MODE_INSERT = 2,
107 MODE_APPKEYPAD = 4,
108 MODE_ALTSCREEN = 8,
109 MODE_CRLF = 16,
110 MODE_MOUSEBTN = 32,
111 MODE_MOUSEMOTION = 64,
112 MODE_REVERSE = 128,
113 MODE_KBDLOCK = 256,
114 MODE_HIDE = 512,
115 MODE_ECHO = 1024,
116 MODE_APPCURSOR = 2048,
117 MODE_MOUSESGR = 4096,
118 MODE_8BIT = 8192,
119 MODE_BLINK = 16384,
120 MODE_FBLINK = 32768,
121 MODE_FOCUS = 65536,
122 MODE_MOUSEX10 = 131072,
123 MODE_MOUSEMANY = 262144,
124 MODE_MOUSE = MODE_MOUSEBTN|MODE_MOUSEMOTION|MODE_MOUSEX10\
125 |MODE_MOUSEMANY,
126 };
127
128 enum escape_state {
129 ESC_START = 1,
130 ESC_CSI = 2,
131 ESC_STR = 4, /* DSC, OSC, PM, APC */
132 ESC_ALTCHARSET = 8,
133 ESC_STR_END = 16, /* a final string was encountered */
134 ESC_TEST = 32, /* Enter in test mode */
135 };
136
137 enum window_state {
138 WIN_VISIBLE = 1,
139 WIN_REDRAW = 2,
140 WIN_FOCUSED = 4
141 };
142
143 enum selection_type {
144 SEL_REGULAR = 1,
145 SEL_RECTANGULAR = 2
146 };
147
148 enum selection_snap {
149 SNAP_WORD = 1,
150 SNAP_LINE = 2
151 };
152
153 /* bit macro */
154 #undef B0
155 enum { B0=1, B1=2, B2=4, B3=8, B4=16, B5=32, B6=64, B7=128 };
156
157 typedef unsigned char uchar;
158 typedef unsigned int uint;
159 typedef unsigned long ulong;
160 typedef unsigned short ushort;
161
162 typedef struct {
163 char c[UTF_SIZ]; /* character code */
164 uchar mode; /* attribute flags */
165 ushort fg; /* foreground */
166 ushort bg; /* background */
167 } Glyph;
168
169 typedef Glyph *Line;
170
171 typedef struct {
172 Glyph attr; /* current char attributes */
173 int x;
174 int y;
175 char state;
176 } TCursor;
177
178 /* CSI Escape sequence structs */
179 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
180 typedef struct {
181 char buf[ESC_BUF_SIZ]; /* raw string */
182 int len; /* raw string length */
183 char priv;
184 int arg[ESC_ARG_SIZ];
185 int narg; /* nb of args */
186 char mode;
187 } CSIEscape;
188
189 /* STR Escape sequence structs */
190 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
191 typedef struct {
192 char type; /* ESC type ... */
193 char buf[STR_BUF_SIZ]; /* raw string */
194 int len; /* raw string length */
195 char *args[STR_ARG_SIZ];
196 int narg; /* nb of args */
197 } STREscape;
198
199 /* Internal representation of the screen */
200 typedef struct {
201 int row; /* nb row */
202 int col; /* nb col */
203 Line *line; /* screen */
204 Line *alt; /* alternate screen */
205 bool *dirty; /* dirtyness of lines */
206 TCursor c; /* cursor */
207 int top; /* top scroll limit */
208 int bot; /* bottom scroll limit */
209 int mode; /* terminal mode flags */
210 int esc; /* escape state flags */
211 bool numlock; /* lock numbers in keyboard */
212 bool *tabs;
213 } Term;
214
215 /* Purely graphic info */
216 typedef struct {
217 Display *dpy;
218 Colourmap cmap;
219 Window win;
220 Drawable buf;
221 Atom xembed, wmdeletewin;
222 XIM xim;
223 XIC xic;
224 Draw draw;
225 Visual *vis;
226 XSetWindowAttributes attrs;
227 int scr;
228 bool isfixed; /* is fixed geometry? */
229 int fx, fy, fw, fh; /* fixed geometry */
230 int tw, th; /* tty width and height */
231 int w, h; /* window width and height */
232 int ch; /* char height */
233 int cw; /* char width */
234 char state; /* focus, redraw, visible */
235 } XWindow;
236
237 typedef struct {
238 int b;
239 uint mask;
240 char s[ESC_BUF_SIZ];
241 } Mousekey;
242
243 typedef struct {
244 KeySym k;
245 uint mask;
246 char s[ESC_BUF_SIZ];
247 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
248 signed char appkey; /* application keypad */
249 signed char appcursor; /* application cursor */
250 signed char crlf; /* crlf mode */
251 } Key;
252
253 typedef struct {
254 int mode;
255 int type;
256 int snap;
257 /*
258 * Selection variables:
259 * nb – normalized coordinates of the beginning of the selection
260 * ne – normalized coordinates of the end of the selection
261 * ob – original coordinates of the beginning of the selection
262 * oe – original coordinates of the end of the selection
263 */
264 struct {
265 int x, y;
266 } nb, ne, ob, oe;
267
268 char *clip;
269 Atom xtarget;
270 bool alt;
271 struct timeval tclick1;
272 struct timeval tclick2;
273 } Selection;
274
275 typedef union {
276 int i;
277 unsigned int ui;
278 float f;
279 const void *v;
280 } Arg;
281
282 typedef struct {
283 unsigned int mod;
284 KeySym keysym;
285 void (*func)(const Arg *);
286 const Arg arg;
287 } Shortcut;
288
289 /* function definitions used in config.h */
290 static void clippaste(const Arg *);
291 static void numlock(const Arg *);
292 static void selpaste(const Arg *);
293 static void xzoom(const Arg *);
294
295 /* Config.h for applying patches and the configuration. */
296 #include "config.h"
297
298 /* Font structure */
299 typedef struct {
300 int height;
301 int width;
302 int ascent;
303 int descent;
304 short lbearing;
305 short rbearing;
306 XftFont *match;
307 FcFontSet *set;
308 FcPattern *pattern;
309 } Font;
310
311 /* Drawing Context */
312 typedef struct {
313 Colour col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
314 Font font, bfont, ifont, ibfont;
315 GC gc;
316 } DC;
317
318 static void die(const char *, ...);
319 static void draw(void);
320 static void redraw(int);
321 static void drawregion(int, int, int, int);
322 static void execsh(void);
323 static void sigchld(int);
324 static void run(void);
325
326 static void csidump(void);
327 static void csihandle(void);
328 static void csiparse(void);
329 static void csireset(void);
330 static void strdump(void);
331 static void strhandle(void);
332 static void strparse(void);
333 static void strreset(void);
334
335 static int tattrset(int);
336 static void tclearregion(int, int, int, int);
337 static void tcursor(int);
338 static void tdeletechar(int);
339 static void tdeleteline(int);
340 static void tinsertblank(int);
341 static void tinsertblankline(int);
342 static void tmoveto(int, int);
343 static void tmoveato(int x, int y);
344 static void tnew(int, int);
345 static void tnewline(int);
346 static void tputtab(bool);
347 static void tputc(char *, int);
348 static void treset(void);
349 static int tresize(int, int);
350 static void tscrollup(int, int);
351 static void tscrolldown(int, int);
352 static void tsetattr(int*, int);
353 static void tsetchar(char *, Glyph *, int, int);
354 static void tsetscroll(int, int);
355 static void tswapscreen(void);
356 static void tsetdirt(int, int);
357 static void tsetdirtattr(int);
358 static void tsetmode(bool, bool, int *, int);
359 static void tfulldirt(void);
360 static void techo(char *, int);
361
362 static inline bool match(uint, uint);
363 static void ttynew(void);
364 static void ttyread(void);
365 static void ttyresize(void);
366 static void ttywrite(const char *, size_t);
367
368 static void xdraws(char *, Glyph, int, int, int, int);
369 static void xhints(void);
370 static void xclear(int, int, int, int);
371 static void xdrawcursor(void);
372 static void xinit(void);
373 static void xloadcols(void);
374 static int xsetcolorname(int, const char *);
375 static int xloadfont(Font *, FcPattern *);
376 static void xloadfonts(char *, int);
377 static int xloadfontset(Font *);
378 static void xsettitle(char *);
379 static void xresettitle(void);
380 static void xsetpointermotion(int);
381 static void xseturgency(int);
382 static void xsetsel(char*);
383 static void xtermclear(int, int, int, int);
384 static void xunloadfont(Font *f);
385 static void xunloadfonts(void);
386 static void xresize(int, int);
387
388 static void expose(XEvent *);
389 static void visibility(XEvent *);
390 static void unmap(XEvent *);
391 static char *kmap(KeySym, uint);
392 static void kpress(XEvent *);
393 static void cmessage(XEvent *);
394 static void cresize(int, int);
395 static void resize(XEvent *);
396 static void focus(XEvent *);
397 static void brelease(XEvent *);
398 static void bpress(XEvent *);
399 static void bmotion(XEvent *);
400 static void selnotify(XEvent *);
401 static void selclear(XEvent *);
402 static void selrequest(XEvent *);
403
404 static void selinit(void);
405 static void selsort(void);
406 static inline bool selected(int, int);
407 static void selcopy(void);
408 static void selscroll(int, int);
409 static void selsnap(int, int *, int *, int);
410
411 static int utf8decode(char *, long *);
412 static int utf8encode(long *, char *);
413 static int utf8size(char *);
414 static int isfullutf8(char *, int);
415
416 static ssize_t xwrite(int, char *, size_t);
417 static void *xmalloc(size_t);
418 static void *xrealloc(void *, size_t);
419 static void *xcalloc(size_t, size_t);
420
421 static void (*handler[LASTEvent])(XEvent *) = {
422 [KeyPress] = kpress,
423 [ClientMessage] = cmessage,
424 [ConfigureNotify] = resize,
425 [VisibilityNotify] = visibility,
426 [UnmapNotify] = unmap,
427 [Expose] = expose,
428 [FocusIn] = focus,
429 [FocusOut] = focus,
430 [MotionNotify] = bmotion,
431 [ButtonPress] = bpress,
432 [ButtonRelease] = brelease,
433 [SelectionClear] = selclear,
434 [SelectionNotify] = selnotify,
435 [SelectionRequest] = selrequest,
436 };
437
438 /* Globals */
439 static DC dc;
440 static XWindow xw;
441 static Term term;
442 static CSIEscape csiescseq;
443 static STREscape strescseq;
444 static int cmdfd;
445 static pid_t pid;
446 static Selection sel;
447 static int iofd = -1;
448 static char **opt_cmd = NULL;
449 static char *opt_io = NULL;
450 static char *opt_title = NULL;
451 static char *opt_embed = NULL;
452 static char *opt_class = NULL;
453 static char *opt_font = NULL;
454 static int oldbutton = 3; /* button event on startup: 3 = release */
455
456 static char *usedfont = NULL;
457 static int usedfontsize = 0;
458
459 /* Font Ring Cache */
460 enum {
461 FRC_NORMAL,
462 FRC_ITALIC,
463 FRC_BOLD,
464 FRC_ITALICBOLD
465 };
466
467 typedef struct {
468 XftFont *font;
469 long c;
470 int flags;
471 } Fontcache;
472
473 /*
474 * Fontcache is a ring buffer, with frccur as current position and frclen as
475 * the current length of used elements.
476 */
477
478 static Fontcache frc[1024];
479 static int frccur = -1, frclen = 0;
480
481 ssize_t
482 xwrite(int fd, char *s, size_t len) {
483 size_t aux = len;
484
485 while(len > 0) {
486 ssize_t r = write(fd, s, len);
487 if(r < 0)
488 return r;
489 len -= r;
490 s += r;
491 }
492 return aux;
493 }
494
495 void *
496 xmalloc(size_t len) {
497 void *p = malloc(len);
498
499 if(!p)
500 die("Out of memory\n");
501
502 return p;
503 }
504
505 void *
506 xrealloc(void *p, size_t len) {
507 if((p = realloc(p, len)) == NULL)
508 die("Out of memory\n");
509
510 return p;
511 }
512
513 void *
514 xcalloc(size_t nmemb, size_t size) {
515 void *p = calloc(nmemb, size);
516
517 if(!p)
518 die("Out of memory\n");
519
520 return p;
521 }
522
523 int
524 utf8decode(char *s, long *u) {
525 uchar c;
526 int i, n, rtn;
527
528 rtn = 1;
529 c = *s;
530 if(~c & B7) { /* 0xxxxxxx */
531 *u = c;
532 return rtn;
533 } else if((c & (B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */
534 *u = c&(B4|B3|B2|B1|B0);
535 n = 1;
536 } else if((c & (B7|B6|B5|B4)) == (B7|B6|B5)) { /* 1110xxxx */
537 *u = c&(B3|B2|B1|B0);
538 n = 2;
539 } else if((c & (B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) { /* 11110xxx */
540 *u = c & (B2|B1|B0);
541 n = 3;
542 } else {
543 goto invalid;
544 }
545
546 for(i = n, ++s; i > 0; --i, ++rtn, ++s) {
547 c = *s;
548 if((c & (B7|B6)) != B7) /* 10xxxxxx */
549 goto invalid;
550 *u <<= 6;
551 *u |= c & (B5|B4|B3|B2|B1|B0);
552 }
553
554 if((n == 1 && *u < 0x80) ||
555 (n == 2 && *u < 0x800) ||
556 (n == 3 && *u < 0x10000) ||
557 (*u >= 0xD800 && *u <= 0xDFFF)) {
558 goto invalid;
559 }
560
561 return rtn;
562 invalid:
563 *u = 0xFFFD;
564
565 return rtn;
566 }
567
568 int
569 utf8encode(long *u, char *s) {
570 uchar *sp;
571 ulong uc;
572 int i, n;
573
574 sp = (uchar *)s;
575 uc = *u;
576 if(uc < 0x80) {
577 *sp = uc; /* 0xxxxxxx */
578 return 1;
579 } else if(*u < 0x800) {
580 *sp = (uc >> 6) | (B7|B6); /* 110xxxxx */
581 n = 1;
582 } else if(uc < 0x10000) {
583 *sp = (uc >> 12) | (B7|B6|B5); /* 1110xxxx */
584 n = 2;
585 } else if(uc <= 0x10FFFF) {
586 *sp = (uc >> 18) | (B7|B6|B5|B4); /* 11110xxx */
587 n = 3;
588 } else {
589 goto invalid;
590 }
591
592 for(i=n,++sp; i>0; --i,++sp)
593 *sp = ((uc >> 6*(i-1)) & (B5|B4|B3|B2|B1|B0)) | B7; /* 10xxxxxx */
594
595 return n+1;
596 invalid:
597 /* U+FFFD */
598 *s++ = '\xEF';
599 *s++ = '\xBF';
600 *s = '\xBD';
601
602 return 3;
603 }
604
605 /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
606 UTF-8 otherwise return 0 */
607 int
608 isfullutf8(char *s, int b) {
609 uchar *c1, *c2, *c3;
610
611 c1 = (uchar *)s;
612 c2 = (uchar *)++s;
613 c3 = (uchar *)++s;
614 if(b < 1) {
615 return 0;
616 } else if((*c1&(B7|B6|B5)) == (B7|B6) && b == 1) {
617 return 0;
618 } else if((*c1&(B7|B6|B5|B4)) == (B7|B6|B5) &&
619 ((b == 1) ||
620 ((b == 2) && (*c2&(B7|B6)) == B7))) {
621 return 0;
622 } else if((*c1&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4) &&
623 ((b == 1) ||
624 ((b == 2) && (*c2&(B7|B6)) == B7) ||
625 ((b == 3) && (*c2&(B7|B6)) == B7 && (*c3&(B7|B6)) == B7))) {
626 return 0;
627 } else {
628 return 1;
629 }
630 }
631
632 int
633 utf8size(char *s) {
634 uchar c = *s;
635
636 if(~c&B7) {
637 return 1;
638 } else if((c&(B7|B6|B5)) == (B7|B6)) {
639 return 2;
640 } else if((c&(B7|B6|B5|B4)) == (B7|B6|B5)) {
641 return 3;
642 } else {
643 return 4;
644 }
645 }
646
647 static void
648 selinit(void) {
649 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
650 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
651 sel.mode = 0;
652 sel.ob.x = -1;
653 sel.clip = NULL;
654 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
655 if(sel.xtarget == None)
656 sel.xtarget = XA_STRING;
657 }
658
659 static int
660 x2col(int x) {
661 x -= borderpx;
662 x /= xw.cw;
663
664 return LIMIT(x, 0, term.col-1);
665 }
666
667 static int
668 y2row(int y) {
669 y -= borderpx;
670 y /= xw.ch;
671
672 return LIMIT(y, 0, term.row-1);
673 }
674
675 static void
676 selsort(void) {
677 if(sel.ob.y == sel.oe.y) {
678 sel.nb.x = MIN(sel.ob.x, sel.oe.x);
679 sel.ne.x = MAX(sel.ob.x, sel.oe.x);
680 } else {
681 sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
682 sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
683 }
684 sel.nb.y = MIN(sel.ob.y, sel.oe.y);
685 sel.ne.y = MAX(sel.ob.y, sel.oe.y);
686 }
687
688 static inline bool
689 selected(int x, int y) {
690 if(sel.ne.y == y && sel.nb.y == y)
691 return BETWEEN(x, sel.nb.x, sel.ne.x);
692
693 if(sel.type == SEL_RECTANGULAR) {
694 return ((sel.nb.y <= y && y <= sel.ne.y)
695 && (sel.nb.x <= x && x <= sel.ne.x));
696 }
697
698 return ((sel.nb.y < y && y < sel.ne.y)
699 || (y == sel.ne.y && x <= sel.ne.x))
700 || (y == sel.nb.y && x >= sel.nb.x
701 && (x <= sel.ne.x || sel.nb.y != sel.ne.y));
702 }
703
704 void
705 selsnap(int mode, int *x, int *y, int direction) {
706 int i;
707
708 switch(mode) {
709 case SNAP_WORD:
710 /*
711 * Snap around if the word wraps around at the end or
712 * beginning of a line.
713 */
714 for(;;) {
715 if(direction < 0 && *x <= 0) {
716 if(*y > 0 && term.line[*y - 1][term.col-1].mode
717 & ATTR_WRAP) {
718 *y -= 1;
719 *x = term.col-1;
720 } else {
721 break;
722 }
723 }
724 if(direction > 0 && *x >= term.col-1) {
725 if(*y < term.row-1 && term.line[*y][*x].mode
726 & ATTR_WRAP) {
727 *y += 1;
728 *x = 0;
729 } else {
730 break;
731 }
732 }
733
734 if(strchr(worddelimiters,
735 term.line[*y][*x + direction].c[0])) {
736 break;
737 }
738
739 *x += direction;
740 }
741 break;
742 case SNAP_LINE:
743 /*
744 * Snap around if the the previous line or the current one
745 * has set ATTR_WRAP at its end. Then the whole next or
746 * previous line will be selected.
747 */
748 *x = (direction < 0) ? 0 : term.col - 1;
749 if(direction < 0 && *y > 0) {
750 for(; *y > 0; *y += direction) {
751 if(!(term.line[*y-1][term.col-1].mode
752 & ATTR_WRAP)) {
753 break;
754 }
755 }
756 } else if(direction > 0 && *y < term.row-1) {
757 for(; *y < term.row; *y += direction) {
758 if(!(term.line[*y][term.col-1].mode
759 & ATTR_WRAP)) {
760 break;
761 }
762 }
763 }
764 break;
765 default:
766 /*
767 * Select the whole line when the end of line is reached.
768 */
769 if(direction > 0) {
770 i = term.col;
771 while(--i > 0 && term.line[*y][i].c[0] == ' ')
772 /* nothing */;
773 if(i > 0 && i < *x)
774 *x = term.col - 1;
775 }
776 break;
777 }
778 }
779
780 void
781 getbuttoninfo(XEvent *e) {
782 int type;
783 uint state = e->xbutton.state &~Button1Mask;
784
785 sel.alt = IS_SET(MODE_ALTSCREEN);
786
787 sel.oe.x = x2col(e->xbutton.x);
788 sel.oe.y = y2row(e->xbutton.y);
789
790 if(sel.ob.y < sel.oe.y
791 || (sel.ob.y == sel.oe.y && sel.ob.x < sel.oe.x)) {
792 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
793 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
794 } else {
795 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, -1);
796 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, +1);
797 }
798 selsort();
799
800 sel.type = SEL_REGULAR;
801 for(type = 1; type < LEN(selmasks); ++type) {
802 if(match(selmasks[type], state)) {
803 sel.type = type;
804 break;
805 }
806 }
807 }
808
809 void
810 mousereport(XEvent *e) {
811 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
812 button = e->xbutton.button, state = e->xbutton.state,
813 len;
814 char buf[40];
815 static int ox, oy;
816
817 /* from urxvt */
818 if(e->xbutton.type == MotionNotify) {
819 if(x == ox && y == oy)
820 return;
821 if(!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
822 return;
823 /* MOUSE_MOTION: no reporting if no button is pressed */
824 if(IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
825 return;
826
827 button = oldbutton + 32;
828 ox = x;
829 oy = y;
830 } else if(!IS_SET(MODE_MOUSESGR)
831 && (e->xbutton.type == ButtonRelease
832 || button == AnyButton)) {
833 button = 3;
834 } else {
835 button -= Button1;
836 if(button >= 3)
837 button += 64 - 3;
838 if(e->xbutton.type == ButtonPress) {
839 oldbutton = button;
840 ox = x;
841 oy = y;
842 }
843 }
844
845 if(!IS_SET(MODE_MOUSEX10)) {
846 button += (state & ShiftMask ? 4 : 0)
847 + (state & Mod4Mask ? 8 : 0)
848 + (state & ControlMask ? 16 : 0);
849 }
850
851 len = 0;
852 if(IS_SET(MODE_MOUSESGR)) {
853 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
854 button, x+1, y+1,
855 e->xbutton.type == ButtonRelease ? 'm' : 'M');
856 } else if(x < 223 && y < 223) {
857 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
858 IS_SET(MODE_MOUSEX10)? button-1 : 32+button,
859 32+x+1, 32+y+1);
860 } else {
861 return;
862 }
863
864 ttywrite(buf, len);
865 }
866
867 void
868 bpress(XEvent *e) {
869 struct timeval now;
870 Mousekey *mk;
871
872 if(IS_SET(MODE_MOUSE)) {
873 mousereport(e);
874 return;
875 }
876
877 for(mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
878 if(e->xbutton.button == mk->b
879 && match(mk->mask, e->xbutton.state)) {
880 ttywrite(mk->s, strlen(mk->s));
881 if(IS_SET(MODE_ECHO))
882 techo(mk->s, strlen(mk->s));
883 return;
884 }
885 }
886
887 if(e->xbutton.button == Button1) {
888 gettimeofday(&now, NULL);
889
890 /* Clear previous selection, logically and visually. */
891 selclear(NULL);
892 sel.mode = 1;
893 sel.type = SEL_REGULAR;
894 sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
895 sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
896
897 /*
898 * If the user clicks below predefined timeouts specific
899 * snapping behaviour is exposed.
900 */
901 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
902 sel.snap = SNAP_LINE;
903 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
904 sel.snap = SNAP_WORD;
905 } else {
906 sel.snap = 0;
907 }
908 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
909 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
910 selsort();
911
912 /*
913 * Draw selection, unless it's regular and we don't want to
914 * make clicks visible
915 */
916 if(sel.snap != 0) {
917 sel.mode++;
918 tsetdirt(sel.nb.y, sel.ne.y);
919 }
920 sel.tclick2 = sel.tclick1;
921 sel.tclick1 = now;
922 }
923 }
924
925 void
926 selcopy(void) {
927 char *str, *ptr;
928 int x, y, bufsize, size, i, ex;
929 Glyph *gp, *last;
930
931 if(sel.ob.x == -1) {
932 str = NULL;
933 } else {
934 bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
935 ptr = str = xmalloc(bufsize);
936
937 /* append every set & selected glyph to the selection */
938 for(y = sel.nb.y; y < sel.ne.y + 1; y++) {
939 gp = &term.line[y][0];
940 last = gp + term.col;
941
942 while(--last >= gp && !(selected(last - gp, y) && \
943 strcmp(last->c, " ") != 0))
944 /* nothing */;
945
946 for(x = 0; gp <= last; x++, ++gp) {
947 if(!selected(x, y))
948 continue;
949
950 size = utf8size(gp->c);
951 memcpy(ptr, gp->c, size);
952 ptr += size;
953 }
954
955 /*
956 * Copy and pasting of line endings is inconsistent
957 * in the inconsistent terminal and GUI world.
958 * The best solution seems like to produce '\n' when
959 * something is copied from st and convert '\n' to
960 * '\r', when something to be pasted is received by
961 * st.
962 * FIXME: Fix the computer world.
963 */
964 if(y < sel.ne.y && !((gp-1)->mode & ATTR_WRAP))
965 *ptr++ = '\n';
966
967 /*
968 * If the last selected line expands in the selection
969 * after the visible text '\n' is appended.
970 */
971 if(y == sel.ne.y) {
972 i = term.col;
973 while(--i > 0 && term.line[y][i].c[0] == ' ')
974 /* nothing */;
975 ex = sel.ne.x;
976 if(sel.nb.y == sel.ne.y && sel.ne.x < sel.nb.x)
977 ex = sel.nb.x;
978 if(i < ex)
979 *ptr++ = '\n';
980 }
981 }
982 *ptr = 0;
983 }
984 xsetsel(str);
985 }
986
987 void
988 selnotify(XEvent *e) {
989 ulong nitems, ofs, rem;
990 int format;
991 uchar *data, *last, *repl;
992 Atom type;
993
994 ofs = 0;
995 do {
996 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
997 False, AnyPropertyType, &type, &format,
998 &nitems, &rem, &data)) {
999 fprintf(stderr, "Clipboard allocation failed\n");
1000 return;
1001 }
1002
1003 /*
1004 * As seen in selcopy:
1005 * Line endings are inconsistent in the terminal and GUI world
1006 * copy and pasting. When receiving some selection data,
1007 * replace all '\n' with '\r'.
1008 * FIXME: Fix the computer world.
1009 */
1010 repl = data;
1011 last = data + nitems * format / 8;
1012 while((repl = memchr(repl, '\n', last - repl))) {
1013 *repl++ = '\r';
1014 }
1015
1016 ttywrite((const char *)data, nitems * format / 8);
1017 XFree(data);
1018 /* number of 32-bit chunks returned */
1019 ofs += nitems * format / 32;
1020 } while(rem > 0);
1021 }
1022
1023 void
1024 selpaste(const Arg *dummy) {
1025 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
1026 xw.win, CurrentTime);
1027 }
1028
1029 void
1030 clippaste(const Arg *dummy) {
1031 Atom clipboard;
1032
1033 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1034 XConvertSelection(xw.dpy, clipboard, sel.xtarget, XA_PRIMARY,
1035 xw.win, CurrentTime);
1036 }
1037
1038 void
1039 selclear(XEvent *e) {
1040 if(sel.ob.x == -1)
1041 return;
1042 sel.ob.x = -1;
1043 tsetdirt(sel.nb.y, sel.ne.y);
1044 }
1045
1046 void
1047 selrequest(XEvent *e) {
1048 XSelectionRequestEvent *xsre;
1049 XSelectionEvent xev;
1050 Atom xa_targets, string;
1051
1052 xsre = (XSelectionRequestEvent *) e;
1053 xev.type = SelectionNotify;
1054 xev.requestor = xsre->requestor;
1055 xev.selection = xsre->selection;
1056 xev.target = xsre->target;
1057 xev.time = xsre->time;
1058 /* reject */
1059 xev.property = None;
1060
1061 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
1062 if(xsre->target == xa_targets) {
1063 /* respond with the supported type */
1064 string = sel.xtarget;
1065 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1066 XA_ATOM, 32, PropModeReplace,
1067 (uchar *) &string, 1);
1068 xev.property = xsre->property;
1069 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
1070 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1071 xsre->target, 8, PropModeReplace,
1072 (uchar *) sel.clip, strlen(sel.clip));
1073 xev.property = xsre->property;
1074 }
1075
1076 /* all done, send a notification to the listener */
1077 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
1078 fprintf(stderr, "Error sending SelectionNotify event\n");
1079 }
1080
1081 void
1082 xsetsel(char *str) {
1083 /* register the selection for both the clipboard and the primary */
1084 Atom clipboard;
1085
1086 free(sel.clip);
1087 sel.clip = str;
1088
1089 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
1090
1091 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1092 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
1093 }
1094
1095 void
1096 brelease(XEvent *e) {
1097 if(IS_SET(MODE_MOUSE)) {
1098 mousereport(e);
1099 return;
1100 }
1101
1102 if(e->xbutton.button == Button2) {
1103 selpaste(NULL);
1104 } else if(e->xbutton.button == Button1) {
1105 if(sel.mode < 2) {
1106 selclear(NULL);
1107 } else {
1108 getbuttoninfo(e);
1109 selcopy();
1110 }
1111 sel.mode = 0;
1112 tsetdirt(sel.nb.y, sel.ne.y);
1113 }
1114 }
1115
1116 void
1117 bmotion(XEvent *e) {
1118 int oldey, oldex, oldsby, oldsey;
1119
1120 if(IS_SET(MODE_MOUSE)) {
1121 mousereport(e);
1122 return;
1123 }
1124
1125 if(!sel.mode)
1126 return;
1127
1128 sel.mode++;
1129 oldey = sel.oe.y;
1130 oldex = sel.oe.x;
1131 oldsby = sel.nb.y;
1132 oldsey = sel.ne.y;
1133 getbuttoninfo(e);
1134
1135 if(oldey != sel.oe.y || oldex != sel.oe.x)
1136 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
1137 }
1138
1139 void
1140 die(const char *errstr, ...) {
1141 va_list ap;
1142
1143 va_start(ap, errstr);
1144 vfprintf(stderr, errstr, ap);
1145 va_end(ap);
1146 exit(EXIT_FAILURE);
1147 }
1148
1149 void
1150 execsh(void) {
1151 char **args;
1152 char *envshell = getenv("SHELL");
1153 const struct passwd *pass = getpwuid(getuid());
1154 char buf[sizeof(long) * 8 + 1];
1155
1156 unsetenv("COLUMNS");
1157 unsetenv("LINES");
1158 unsetenv("TERMCAP");
1159
1160 if(pass) {
1161 setenv("LOGNAME", pass->pw_name, 1);
1162 setenv("USER", pass->pw_name, 1);
1163 setenv("SHELL", pass->pw_shell, 0);
1164 setenv("HOME", pass->pw_dir, 0);
1165 }
1166
1167 snprintf(buf, sizeof(buf), "%lu", xw.win);
1168 setenv("WINDOWID", buf, 1);
1169
1170 signal(SIGCHLD, SIG_DFL);
1171 signal(SIGHUP, SIG_DFL);
1172 signal(SIGINT, SIG_DFL);
1173 signal(SIGQUIT, SIG_DFL);
1174 signal(SIGTERM, SIG_DFL);
1175 signal(SIGALRM, SIG_DFL);
1176
1177 DEFAULT(envshell, shell);
1178 setenv("TERM", termname, 1);
1179 args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
1180 execvp(args[0], args);
1181 exit(EXIT_FAILURE);
1182 }
1183
1184 void
1185 sigchld(int a) {
1186 int stat = 0;
1187
1188 if(waitpid(pid, &stat, 0) < 0)
1189 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
1190
1191 if(WIFEXITED(stat)) {
1192 exit(WEXITSTATUS(stat));
1193 } else {
1194 exit(EXIT_FAILURE);
1195 }
1196 }
1197
1198 void
1199 ttynew(void) {
1200 int m, s;
1201 struct winsize w = {term.row, term.col, 0, 0};
1202
1203 /* seems to work fine on linux, openbsd and freebsd */
1204 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1205 die("openpty failed: %s\n", SERRNO);
1206
1207 switch(pid = fork()) {
1208 case -1:
1209 die("fork failed\n");
1210 break;
1211 case 0:
1212 setsid(); /* create a new process group */
1213 dup2(s, STDIN_FILENO);
1214 dup2(s, STDOUT_FILENO);
1215 dup2(s, STDERR_FILENO);
1216 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1217 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
1218 close(s);
1219 close(m);
1220 execsh();
1221 break;
1222 default:
1223 close(s);
1224 cmdfd = m;
1225 signal(SIGCHLD, sigchld);
1226 if(opt_io) {
1227 iofd = (!strcmp(opt_io, "-")) ?
1228 STDOUT_FILENO :
1229 open(opt_io, O_WRONLY | O_CREAT, 0666);
1230 if(iofd < 0) {
1231 fprintf(stderr, "Error opening %s:%s\n",
1232 opt_io, strerror(errno));
1233 }
1234 }
1235 }
1236 }
1237
1238 void
1239 dump(char c) {
1240 static int col;
1241
1242 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
1243 if(++col % 10 == 0)
1244 fprintf(stderr, "\n");
1245 }
1246
1247 void
1248 ttyread(void) {
1249 static char buf[BUFSIZ];
1250 static int buflen = 0;
1251 char *ptr;
1252 char s[UTF_SIZ];
1253 int charsize; /* size of utf8 char in bytes */
1254 long utf8c;
1255 int ret;
1256
1257 /* append read bytes to unprocessed bytes */
1258 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1259 die("Couldn't read from shell: %s\n", SERRNO);
1260
1261 /* process every complete utf8 char */
1262 buflen += ret;
1263 ptr = buf;
1264 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
1265 charsize = utf8decode(ptr, &utf8c);
1266 utf8encode(&utf8c, s);
1267 tputc(s, charsize);
1268 ptr += charsize;
1269 buflen -= charsize;
1270 }
1271
1272 /* keep any uncomplete utf8 char for the next call */
1273 memmove(buf, ptr, buflen);
1274 }
1275
1276 void
1277 ttywrite(const char *s, size_t n) {
1278 if(write(cmdfd, s, n) == -1)
1279 die("write error on tty: %s\n", SERRNO);
1280 }
1281
1282 void
1283 ttyresize(void) {
1284 struct winsize w;
1285
1286 w.ws_row = term.row;
1287 w.ws_col = term.col;
1288 w.ws_xpixel = xw.tw;
1289 w.ws_ypixel = xw.th;
1290 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1291 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
1292 }
1293
1294 int
1295 tattrset(int attr) {
1296 int i, j;
1297
1298 for(i = 0; i < term.row-1; i++) {
1299 for(j = 0; j < term.col-1; j++) {
1300 if(term.line[i][j].mode & attr)
1301 return 1;
1302 }
1303 }
1304
1305 return 0;
1306 }
1307
1308 void
1309 tsetdirt(int top, int bot) {
1310 int i;
1311
1312 LIMIT(top, 0, term.row-1);
1313 LIMIT(bot, 0, term.row-1);
1314
1315 for(i = top; i <= bot; i++)
1316 term.dirty[i] = 1;
1317 }
1318
1319 void
1320 tsetdirtattr(int attr) {
1321 int i, j;
1322
1323 for(i = 0; i < term.row-1; i++) {
1324 for(j = 0; j < term.col-1; j++) {
1325 if(term.line[i][j].mode & attr) {
1326 tsetdirt(i, i);
1327 break;
1328 }
1329 }
1330 }
1331 }
1332
1333 void
1334 tfulldirt(void) {
1335 tsetdirt(0, term.row-1);
1336 }
1337
1338 void
1339 tcursor(int mode) {
1340 static TCursor c;
1341
1342 if(mode == CURSOR_SAVE) {
1343 c = term.c;
1344 } else if(mode == CURSOR_LOAD) {
1345 term.c = c;
1346 tmoveto(c.x, c.y);
1347 }
1348 }
1349
1350 void
1351 treset(void) {
1352 uint i;
1353
1354 term.c = (TCursor){{
1355 .mode = ATTR_NULL,
1356 .fg = defaultfg,
1357 .bg = defaultbg
1358 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1359
1360 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1361 for(i = tabspaces; i < term.col; i += tabspaces)
1362 term.tabs[i] = 1;
1363 term.top = 0;
1364 term.bot = term.row - 1;
1365 term.mode = MODE_WRAP;
1366
1367 tclearregion(0, 0, term.col-1, term.row-1);
1368 tmoveto(0, 0);
1369 tcursor(CURSOR_SAVE);
1370 }
1371
1372 void
1373 tnew(int col, int row) {
1374 memset(&term, 0, sizeof(Term));
1375 tresize(col, row);
1376 term.numlock = 1;
1377
1378 treset();
1379 }
1380
1381 void
1382 tswapscreen(void) {
1383 Line *tmp = term.line;
1384
1385 term.line = term.alt;
1386 term.alt = tmp;
1387 term.mode ^= MODE_ALTSCREEN;
1388 tfulldirt();
1389 }
1390
1391 void
1392 tscrolldown(int orig, int n) {
1393 int i;
1394 Line temp;
1395
1396 LIMIT(n, 0, term.bot-orig+1);
1397
1398 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1399
1400 for(i = term.bot; i >= orig+n; i--) {
1401 temp = term.line[i];
1402 term.line[i] = term.line[i-n];
1403 term.line[i-n] = temp;
1404
1405 term.dirty[i] = 1;
1406 term.dirty[i-n] = 1;
1407 }
1408
1409 selscroll(orig, n);
1410 }
1411
1412 void
1413 tscrollup(int orig, int n) {
1414 int i;
1415 Line temp;
1416 LIMIT(n, 0, term.bot-orig+1);
1417
1418 tclearregion(0, orig, term.col-1, orig+n-1);
1419
1420 for(i = orig; i <= term.bot-n; i++) {
1421 temp = term.line[i];
1422 term.line[i] = term.line[i+n];
1423 term.line[i+n] = temp;
1424
1425 term.dirty[i] = 1;
1426 term.dirty[i+n] = 1;
1427 }
1428
1429 selscroll(orig, -n);
1430 }
1431
1432 void
1433 selscroll(int orig, int n) {
1434 if(sel.ob.x == -1)
1435 return;
1436
1437 if(BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
1438 if((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
1439 selclear(NULL);
1440 return;
1441 }
1442 if(sel.type == SEL_RECTANGULAR) {
1443 if(sel.ob.y < term.top)
1444 sel.ob.y = term.top;
1445 if(sel.oe.y > term.bot)
1446 sel.oe.y = term.bot;
1447 } else {
1448 if(sel.ob.y < term.top) {
1449 sel.ob.y = term.top;
1450 sel.ob.x = 0;
1451 }
1452 if(sel.oe.y > term.bot) {
1453 sel.oe.y = term.bot;
1454 sel.oe.x = term.col;
1455 }
1456 }
1457 selsort();
1458 }
1459 }
1460
1461 void
1462 tnewline(int first_col) {
1463 int y = term.c.y;
1464
1465 if(y == term.bot) {
1466 tscrollup(term.top, 1);
1467 } else {
1468 y++;
1469 }
1470 tmoveto(first_col ? 0 : term.c.x, y);
1471 }
1472
1473 void
1474 csiparse(void) {
1475 char *p = csiescseq.buf, *np;
1476 long int v;
1477
1478 csiescseq.narg = 0;
1479 if(*p == '?') {
1480 csiescseq.priv = 1;
1481 p++;
1482 }
1483
1484 csiescseq.buf[csiescseq.len] = '\0';
1485 while(p < csiescseq.buf+csiescseq.len) {
1486 np = NULL;
1487 v = strtol(p, &np, 10);
1488 if(np == p)
1489 v = 0;
1490 if(v == LONG_MAX || v == LONG_MIN)
1491 v = -1;
1492 csiescseq.arg[csiescseq.narg++] = v;
1493 p = np;
1494 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1495 break;
1496 p++;
1497 }
1498 csiescseq.mode = *p;
1499 }
1500
1501 /* for absolute user moves, when decom is set */
1502 void
1503 tmoveato(int x, int y) {
1504 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1505 }
1506
1507 void
1508 tmoveto(int x, int y) {
1509 int miny, maxy;
1510
1511 if(term.c.state & CURSOR_ORIGIN) {
1512 miny = term.top;
1513 maxy = term.bot;
1514 } else {
1515 miny = 0;
1516 maxy = term.row - 1;
1517 }
1518 LIMIT(x, 0, term.col-1);
1519 LIMIT(y, miny, maxy);
1520 term.c.state &= ~CURSOR_WRAPNEXT;
1521 term.c.x = x;
1522 term.c.y = y;
1523 }
1524
1525 void
1526 tsetchar(char *c, Glyph *attr, int x, int y) {
1527 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1528 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1529 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1530 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1531 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1532 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1533 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1534 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1535 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1536 };
1537
1538 /*
1539 * The table is proudly stolen from rxvt.
1540 */
1541 if(attr->mode & ATTR_GFX) {
1542 if(c[0] >= 0x41 && c[0] <= 0x7e
1543 && vt100_0[c[0] - 0x41]) {
1544 c = vt100_0[c[0] - 0x41];
1545 }
1546 }
1547
1548 term.dirty[y] = 1;
1549 term.line[y][x] = *attr;
1550 memcpy(term.line[y][x].c, c, UTF_SIZ);
1551 }
1552
1553 void
1554 tclearregion(int x1, int y1, int x2, int y2) {
1555 int x, y, temp;
1556
1557 if(x1 > x2)
1558 temp = x1, x1 = x2, x2 = temp;
1559 if(y1 > y2)
1560 temp = y1, y1 = y2, y2 = temp;
1561
1562 LIMIT(x1, 0, term.col-1);
1563 LIMIT(x2, 0, term.col-1);
1564 LIMIT(y1, 0, term.row-1);
1565 LIMIT(y2, 0, term.row-1);
1566
1567 for(y = y1; y <= y2; y++) {
1568 term.dirty[y] = 1;
1569 for(x = x1; x <= x2; x++) {
1570 if(selected(x, y))
1571 selclear(NULL);
1572 term.line[y][x] = term.c.attr;
1573 memcpy(term.line[y][x].c, " ", 2);
1574 }
1575 }
1576 }
1577
1578 void
1579 tdeletechar(int n) {
1580 int src = term.c.x + n;
1581 int dst = term.c.x;
1582 int size = term.col - src;
1583
1584 term.dirty[term.c.y] = 1;
1585
1586 if(src >= term.col) {
1587 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1588 return;
1589 }
1590
1591 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1592 size * sizeof(Glyph));
1593 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1594 }
1595
1596 void
1597 tinsertblank(int n) {
1598 int src = term.c.x;
1599 int dst = src + n;
1600 int size = term.col - dst;
1601
1602 term.dirty[term.c.y] = 1;
1603
1604 if(dst >= term.col) {
1605 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1606 return;
1607 }
1608
1609 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1610 size * sizeof(Glyph));
1611 tclearregion(src, term.c.y, dst - 1, term.c.y);
1612 }
1613
1614 void
1615 tinsertblankline(int n) {
1616 if(term.c.y < term.top || term.c.y > term.bot)
1617 return;
1618
1619 tscrolldown(term.c.y, n);
1620 }
1621
1622 void
1623 tdeleteline(int n) {
1624 if(term.c.y < term.top || term.c.y > term.bot)
1625 return;
1626
1627 tscrollup(term.c.y, n);
1628 }
1629
1630 void
1631 tsetattr(int *attr, int l) {
1632 int i;
1633
1634 for(i = 0; i < l; i++) {
1635 switch(attr[i]) {
1636 case 0:
1637 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE \
1638 | ATTR_BOLD | ATTR_ITALIC \
1639 | ATTR_BLINK);
1640 term.c.attr.fg = defaultfg;
1641 term.c.attr.bg = defaultbg;
1642 break;
1643 case 1:
1644 term.c.attr.mode |= ATTR_BOLD;
1645 break;
1646 case 3:
1647 term.c.attr.mode |= ATTR_ITALIC;
1648 break;
1649 case 4:
1650 term.c.attr.mode |= ATTR_UNDERLINE;
1651 break;
1652 case 5: /* slow blink */
1653 case 6: /* rapid blink */
1654 term.c.attr.mode |= ATTR_BLINK;
1655 break;
1656 case 7:
1657 term.c.attr.mode |= ATTR_REVERSE;
1658 break;
1659 case 21:
1660 case 22:
1661 term.c.attr.mode &= ~ATTR_BOLD;
1662 break;
1663 case 23:
1664 term.c.attr.mode &= ~ATTR_ITALIC;
1665 break;
1666 case 24:
1667 term.c.attr.mode &= ~ATTR_UNDERLINE;
1668 break;
1669 case 25:
1670 case 26:
1671 term.c.attr.mode &= ~ATTR_BLINK;
1672 break;
1673 case 27:
1674 term.c.attr.mode &= ~ATTR_REVERSE;
1675 break;
1676 case 38:
1677 if(i + 2 < l && attr[i + 1] == 5) {
1678 i += 2;
1679 if(BETWEEN(attr[i], 0, 255)) {
1680 term.c.attr.fg = attr[i];
1681 } else {
1682 fprintf(stderr,
1683 "erresc: bad fgcolor %d\n",
1684 attr[i]);
1685 }
1686 } else {
1687 fprintf(stderr,
1688 "erresc(38): gfx attr %d unknown\n",
1689 attr[i]);
1690 }
1691 break;
1692 case 39:
1693 term.c.attr.fg = defaultfg;
1694 break;
1695 case 48:
1696 if(i + 2 < l && attr[i + 1] == 5) {
1697 i += 2;
1698 if(BETWEEN(attr[i], 0, 255)) {
1699 term.c.attr.bg = attr[i];
1700 } else {
1701 fprintf(stderr,
1702 "erresc: bad bgcolor %d\n",
1703 attr[i]);
1704 }
1705 } else {
1706 fprintf(stderr,
1707 "erresc(48): gfx attr %d unknown\n",
1708 attr[i]);
1709 }
1710 break;
1711 case 49:
1712 term.c.attr.bg = defaultbg;
1713 break;
1714 default:
1715 if(BETWEEN(attr[i], 30, 37)) {
1716 term.c.attr.fg = attr[i] - 30;
1717 } else if(BETWEEN(attr[i], 40, 47)) {
1718 term.c.attr.bg = attr[i] - 40;
1719 } else if(BETWEEN(attr[i], 90, 97)) {
1720 term.c.attr.fg = attr[i] - 90 + 8;
1721 } else if(BETWEEN(attr[i], 100, 107)) {
1722 term.c.attr.bg = attr[i] - 100 + 8;
1723 } else {
1724 fprintf(stderr,
1725 "erresc(default): gfx attr %d unknown\n",
1726 attr[i]), csidump();
1727 }
1728 break;
1729 }
1730 }
1731 }
1732
1733 void
1734 tsetscroll(int t, int b) {
1735 int temp;
1736
1737 LIMIT(t, 0, term.row-1);
1738 LIMIT(b, 0, term.row-1);
1739 if(t > b) {
1740 temp = t;
1741 t = b;
1742 b = temp;
1743 }
1744 term.top = t;
1745 term.bot = b;
1746 }
1747
1748 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1749
1750 void
1751 tsetmode(bool priv, bool set, int *args, int narg) {
1752 int *lim, mode;
1753 bool alt;
1754
1755 for(lim = args + narg; args < lim; ++args) {
1756 if(priv) {
1757 switch(*args) {
1758 break;
1759 case 1: /* DECCKM -- Cursor key */
1760 MODBIT(term.mode, set, MODE_APPCURSOR);
1761 break;
1762 case 5: /* DECSCNM -- Reverse video */
1763 mode = term.mode;
1764 MODBIT(term.mode, set, MODE_REVERSE);
1765 if(mode != term.mode)
1766 redraw(REDRAW_TIMEOUT);
1767 break;
1768 case 6: /* DECOM -- Origin */
1769 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1770 tmoveato(0, 0);
1771 break;
1772 case 7: /* DECAWM -- Auto wrap */
1773 MODBIT(term.mode, set, MODE_WRAP);
1774 break;
1775 case 0: /* Error (IGNORED) */
1776 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1777 case 3: /* DECCOLM -- Column (IGNORED) */
1778 case 4: /* DECSCLM -- Scroll (IGNORED) */
1779 case 8: /* DECARM -- Auto repeat (IGNORED) */
1780 case 18: /* DECPFF -- Printer feed (IGNORED) */
1781 case 19: /* DECPEX -- Printer extent (IGNORED) */
1782 case 42: /* DECNRCM -- National characters (IGNORED) */
1783 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1784 break;
1785 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1786 MODBIT(term.mode, !set, MODE_HIDE);
1787 break;
1788 case 9: /* X10 mouse compatibility mode */
1789 xsetpointermotion(0);
1790 MODBIT(term.mode, 0, MODE_MOUSE);
1791 MODBIT(term.mode, set, MODE_MOUSEX10);
1792 break;
1793 case 1000: /* 1000: report button press */
1794 xsetpointermotion(0);
1795 MODBIT(term.mode, 0, MODE_MOUSE);
1796 MODBIT(term.mode, set, MODE_MOUSEBTN);
1797 break;
1798 case 1002: /* 1002: report motion on button press */
1799 xsetpointermotion(0);
1800 MODBIT(term.mode, 0, MODE_MOUSE);
1801 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1802 break;
1803 case 1003: /* 1003: enable all mouse motions */
1804 xsetpointermotion(set);
1805 MODBIT(term.mode, 0, MODE_MOUSE);
1806 MODBIT(term.mode, set, MODE_MOUSEMANY);
1807 break;
1808 case 1004: /* 1004: send focus events to tty */
1809 MODBIT(term.mode, set, MODE_FOCUS);
1810 break;
1811 case 1006: /* 1006: extended reporting mode */
1812 MODBIT(term.mode, set, MODE_MOUSESGR);
1813 break;
1814 case 1034:
1815 MODBIT(term.mode, set, MODE_8BIT);
1816 break;
1817 case 1049: /* = 1047 and 1048 */
1818 case 47:
1819 case 1047:
1820 if (!allowaltscreen)
1821 break;
1822
1823 alt = IS_SET(MODE_ALTSCREEN);
1824 if(alt) {
1825 tclearregion(0, 0, term.col-1,
1826 term.row-1);
1827 }
1828 if(set ^ alt) /* set is always 1 or 0 */
1829 tswapscreen();
1830 if(*args != 1049)
1831 break;
1832 /* FALLTRU */
1833 case 1048:
1834 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1835 break;
1836 /* Not implemented mouse modes. See comments there. */
1837 case 1001: /* mouse highlight mode; can hang the
1838 terminal by design when implemented. */
1839 case 1005: /* UTF-8 mouse mode; will confuse
1840 applications not supporting UTF-8
1841 and luit. */
1842 case 1015: /* urxvt mangled mouse mode; incompatible
1843 and can be mistaken for other control
1844 codes. */
1845 default:
1846 fprintf(stderr,
1847 "erresc: unknown private set/reset mode %d\n",
1848 *args);
1849 break;
1850 }
1851 } else {
1852 switch(*args) {
1853 case 0: /* Error (IGNORED) */
1854 break;
1855 case 2: /* KAM -- keyboard action */
1856 MODBIT(term.mode, set, MODE_KBDLOCK);
1857 break;
1858 case 4: /* IRM -- Insertion-replacement */
1859 MODBIT(term.mode, set, MODE_INSERT);
1860 break;
1861 case 12: /* SRM -- Send/Receive */
1862 MODBIT(term.mode, !set, MODE_ECHO);
1863 break;
1864 case 20: /* LNM -- Linefeed/new line */
1865 MODBIT(term.mode, set, MODE_CRLF);
1866 break;
1867 default:
1868 fprintf(stderr,
1869 "erresc: unknown set/reset mode %d\n",
1870 *args);
1871 break;
1872 }
1873 }
1874 }
1875 }
1876
1877 void
1878 csihandle(void) {
1879 switch(csiescseq.mode) {
1880 default:
1881 unknown:
1882 fprintf(stderr, "erresc: unknown csi ");
1883 csidump();
1884 /* die(""); */
1885 break;
1886 case '@': /* ICH -- Insert <n> blank char */
1887 DEFAULT(csiescseq.arg[0], 1);
1888 tinsertblank(csiescseq.arg[0]);
1889 break;
1890 case 'A': /* CUU -- Cursor <n> Up */
1891 DEFAULT(csiescseq.arg[0], 1);
1892 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1893 break;
1894 case 'B': /* CUD -- Cursor <n> Down */
1895 case 'e': /* VPR --Cursor <n> Down */
1896 DEFAULT(csiescseq.arg[0], 1);
1897 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1898 break;
1899 case 'c': /* DA -- Device Attributes */
1900 if(csiescseq.arg[0] == 0)
1901 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1902 break;
1903 case 'C': /* CUF -- Cursor <n> Forward */
1904 case 'a': /* HPR -- Cursor <n> Forward */
1905 DEFAULT(csiescseq.arg[0], 1);
1906 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1907 break;
1908 case 'D': /* CUB -- Cursor <n> Backward */
1909 DEFAULT(csiescseq.arg[0], 1);
1910 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1911 break;
1912 case 'E': /* CNL -- Cursor <n> Down and first col */
1913 DEFAULT(csiescseq.arg[0], 1);
1914 tmoveto(0, term.c.y+csiescseq.arg[0]);
1915 break;
1916 case 'F': /* CPL -- Cursor <n> Up and first col */
1917 DEFAULT(csiescseq.arg[0], 1);
1918 tmoveto(0, term.c.y-csiescseq.arg[0]);
1919 break;
1920 case 'g': /* TBC -- Tabulation clear */
1921 switch(csiescseq.arg[0]) {
1922 case 0: /* clear current tab stop */
1923 term.tabs[term.c.x] = 0;
1924 break;
1925 case 3: /* clear all the tabs */
1926 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1927 break;
1928 default:
1929 goto unknown;
1930 }
1931 break;
1932 case 'G': /* CHA -- Move to <col> */
1933 case '`': /* HPA */
1934 DEFAULT(csiescseq.arg[0], 1);
1935 tmoveto(csiescseq.arg[0]-1, term.c.y);
1936 break;
1937 case 'H': /* CUP -- Move to <row> <col> */
1938 case 'f': /* HVP */
1939 DEFAULT(csiescseq.arg[0], 1);
1940 DEFAULT(csiescseq.arg[1], 1);
1941 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1942 break;
1943 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1944 DEFAULT(csiescseq.arg[0], 1);
1945 while(csiescseq.arg[0]--)
1946 tputtab(1);
1947 break;
1948 case 'J': /* ED -- Clear screen */
1949 selclear(NULL);
1950 switch(csiescseq.arg[0]) {
1951 case 0: /* below */
1952 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1953 if(term.c.y < term.row-1) {
1954 tclearregion(0, term.c.y+1, term.col-1,
1955 term.row-1);
1956 }
1957 break;
1958 case 1: /* above */
1959 if(term.c.y > 1)
1960 tclearregion(0, 0, term.col-1, term.c.y-1);
1961 tclearregion(0, term.c.y, term.c.x, term.c.y);
1962 break;
1963 case 2: /* all */
1964 tclearregion(0, 0, term.col-1, term.row-1);
1965 break;
1966 default:
1967 goto unknown;
1968 }
1969 break;
1970 case 'K': /* EL -- Clear line */
1971 switch(csiescseq.arg[0]) {
1972 case 0: /* right */
1973 tclearregion(term.c.x, term.c.y, term.col-1,
1974 term.c.y);
1975 break;
1976 case 1: /* left */
1977 tclearregion(0, term.c.y, term.c.x, term.c.y);
1978 break;
1979 case 2: /* all */
1980 tclearregion(0, term.c.y, term.col-1, term.c.y);
1981 break;
1982 }
1983 break;
1984 case 'S': /* SU -- Scroll <n> line up */
1985 DEFAULT(csiescseq.arg[0], 1);
1986 tscrollup(term.top, csiescseq.arg[0]);
1987 break;
1988 case 'T': /* SD -- Scroll <n> line down */
1989 DEFAULT(csiescseq.arg[0], 1);
1990 tscrolldown(term.top, csiescseq.arg[0]);
1991 break;
1992 case 'L': /* IL -- Insert <n> blank lines */
1993 DEFAULT(csiescseq.arg[0], 1);
1994 tinsertblankline(csiescseq.arg[0]);
1995 break;
1996 case 'l': /* RM -- Reset Mode */
1997 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
1998 break;
1999 case 'M': /* DL -- Delete <n> lines */
2000 DEFAULT(csiescseq.arg[0], 1);
2001 tdeleteline(csiescseq.arg[0]);
2002 break;
2003 case 'X': /* ECH -- Erase <n> char */
2004 DEFAULT(csiescseq.arg[0], 1);
2005 tclearregion(term.c.x, term.c.y,
2006 term.c.x + csiescseq.arg[0] - 1, term.c.y);
2007 break;
2008 case 'P': /* DCH -- Delete <n> char */
2009 DEFAULT(csiescseq.arg[0], 1);
2010 tdeletechar(csiescseq.arg[0]);
2011 break;
2012 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
2013 DEFAULT(csiescseq.arg[0], 1);
2014 while(csiescseq.arg[0]--)
2015 tputtab(0);
2016 break;
2017 case 'd': /* VPA -- Move to <row> */
2018 DEFAULT(csiescseq.arg[0], 1);
2019 tmoveato(term.c.x, csiescseq.arg[0]-1);
2020 break;
2021 case 'h': /* SM -- Set terminal mode */
2022 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
2023 break;
2024 case 'm': /* SGR -- Terminal attribute (color) */
2025 tsetattr(csiescseq.arg, csiescseq.narg);
2026 break;
2027 case 'r': /* DECSTBM -- Set Scrolling Region */
2028 if(csiescseq.priv) {
2029 goto unknown;
2030 } else {
2031 DEFAULT(csiescseq.arg[0], 1);
2032 DEFAULT(csiescseq.arg[1], term.row);
2033 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
2034 tmoveato(0, 0);
2035 }
2036 break;
2037 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
2038 tcursor(CURSOR_SAVE);
2039 break;
2040 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
2041 tcursor(CURSOR_LOAD);
2042 break;
2043 }
2044 }
2045
2046 void
2047 csidump(void) {
2048 int i;
2049 uint c;
2050
2051 printf("ESC[");
2052 for(i = 0; i < csiescseq.len; i++) {
2053 c = csiescseq.buf[i] & 0xff;
2054 if(isprint(c)) {
2055 putchar(c);
2056 } else if(c == '\n') {
2057 printf("(\\n)");
2058 } else if(c == '\r') {
2059 printf("(\\r)");
2060 } else if(c == 0x1b) {
2061 printf("(\\e)");
2062 } else {
2063 printf("(%02x)", c);
2064 }
2065 }
2066 putchar('\n');
2067 }
2068
2069 void
2070 csireset(void) {
2071 memset(&csiescseq, 0, sizeof(csiescseq));
2072 }
2073
2074 void
2075 strhandle(void) {
2076 char *p = NULL;
2077 int i, j, narg;
2078
2079 strparse();
2080 narg = strescseq.narg;
2081
2082 switch(strescseq.type) {
2083 case ']': /* OSC -- Operating System Command */
2084 switch(i = atoi(strescseq.args[0])) {
2085 case 0:
2086 case 1:
2087 case 2:
2088 if(narg > 1)
2089 xsettitle(strescseq.args[1]);
2090 break;
2091 case 4: /* color set */
2092 if(narg < 3)
2093 break;
2094 p = strescseq.args[2];
2095 /* fall through */
2096 case 104: /* color reset, here p = NULL */
2097 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2098 if (!xsetcolorname(j, p)) {
2099 fprintf(stderr, "erresc: invalid color %s\n", p);
2100 } else {
2101 /*
2102 * TODO if defaultbg color is changed, borders
2103 * are dirty
2104 */
2105 redraw(0);
2106 }
2107 break;
2108 default:
2109 fprintf(stderr, "erresc: unknown str ");
2110 strdump();
2111 break;
2112 }
2113 break;
2114 case 'k': /* old title set compatibility */
2115 xsettitle(strescseq.args[0]);
2116 break;
2117 case 'P': /* DSC -- Device Control String */
2118 case '_': /* APC -- Application Program Command */
2119 case '^': /* PM -- Privacy Message */
2120 default:
2121 fprintf(stderr, "erresc: unknown str ");
2122 strdump();
2123 /* die(""); */
2124 break;
2125 }
2126 }
2127
2128 void
2129 strparse(void) {
2130 char *p = strescseq.buf;
2131
2132 strescseq.narg = 0;
2133 strescseq.buf[strescseq.len] = '\0';
2134 while(p && strescseq.narg < STR_ARG_SIZ)
2135 strescseq.args[strescseq.narg++] = strsep(&p, ";");
2136 }
2137
2138 void
2139 strdump(void) {
2140 int i;
2141 uint c;
2142
2143 printf("ESC%c", strescseq.type);
2144 for(i = 0; i < strescseq.len; i++) {
2145 c = strescseq.buf[i] & 0xff;
2146 if(c == '\0') {
2147 return;
2148 } else if(isprint(c)) {
2149 putchar(c);
2150 } else if(c == '\n') {
2151 printf("(\\n)");
2152 } else if(c == '\r') {
2153 printf("(\\r)");
2154 } else if(c == 0x1b) {
2155 printf("(\\e)");
2156 } else {
2157 printf("(%02x)", c);
2158 }
2159 }
2160 printf("ESC\\\n");
2161 }
2162
2163 void
2164 strreset(void) {
2165 memset(&strescseq, 0, sizeof(strescseq));
2166 }
2167
2168 void
2169 tputtab(bool forward) {
2170 uint x = term.c.x;
2171
2172 if(forward) {
2173 if(x == term.col)
2174 return;
2175 for(++x; x < term.col && !term.tabs[x]; ++x)
2176 /* nothing */ ;
2177 } else {
2178 if(x == 0)
2179 return;
2180 for(--x; x > 0 && !term.tabs[x]; --x)
2181 /* nothing */ ;
2182 }
2183 tmoveto(x, term.c.y);
2184 }
2185
2186 void
2187 techo(char *buf, int len) {
2188 for(; len > 0; buf++, len--) {
2189 char c = *buf;
2190
2191 if(c == '\033') { /* escape */
2192 tputc("^", 1);
2193 tputc("[", 1);
2194 } else if(c < '\x20') { /* control code */
2195 if(c != '\n' && c != '\r' && c != '\t') {
2196 c |= '\x40';
2197 tputc("^", 1);
2198 }
2199 tputc(&c, 1);
2200 } else {
2201 break;
2202 }
2203 }
2204 if(len)
2205 tputc(buf, len);
2206 }
2207
2208 void
2209 tputc(char *c, int len) {
2210 uchar ascii = *c;
2211 bool control = ascii < '\x20' || ascii == 0177;
2212
2213 if(iofd != -1) {
2214 if(xwrite(iofd, c, len) < 0) {
2215 fprintf(stderr, "Error writing in %s:%s\n",
2216 opt_io, strerror(errno));
2217 close(iofd);
2218 iofd = -1;
2219 }
2220 }
2221
2222 /*
2223 * STR sequences must be checked before anything else
2224 * because it can use some control codes as part of the sequence.
2225 */
2226 if(term.esc & ESC_STR) {
2227 switch(ascii) {
2228 case '\033':
2229 term.esc = ESC_START | ESC_STR_END;
2230 break;
2231 case '\a': /* backwards compatibility to xterm */
2232 term.esc = 0;
2233 strhandle();
2234 break;
2235 default:
2236 if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2237 memmove(&strescseq.buf[strescseq.len], c, len);
2238 strescseq.len += len;
2239 } else {
2240 /*
2241 * Here is a bug in terminals. If the user never sends
2242 * some code to stop the str or esc command, then st
2243 * will stop responding. But this is better than
2244 * silently failing with unknown characters. At least
2245 * then users will report back.
2246 *
2247 * In the case users ever get fixed, here is the code:
2248 */
2249 /*
2250 * term.esc = 0;
2251 * strhandle();
2252 */
2253 }
2254 }
2255 return;
2256 }
2257
2258 /*
2259 * Actions of control codes must be performed as soon they arrive
2260 * because they can be embedded inside a control sequence, and
2261 * they must not cause conflicts with sequences.
2262 */
2263 if(control) {
2264 switch(ascii) {
2265 case '\t': /* HT */
2266 tputtab(1);
2267 return;
2268 case '\b': /* BS */
2269 tmoveto(term.c.x-1, term.c.y);
2270 return;
2271 case '\r': /* CR */
2272 tmoveto(0, term.c.y);
2273 return;
2274 case '\f': /* LF */
2275 case '\v': /* VT */
2276 case '\n': /* LF */
2277 /* go to first col if the mode is set */
2278 tnewline(IS_SET(MODE_CRLF));
2279 return;
2280 case '\a': /* BEL */
2281 if(!(xw.state & WIN_FOCUSED))
2282 xseturgency(1);
2283 return;
2284 case '\033': /* ESC */
2285 csireset();
2286 term.esc = ESC_START;
2287 return;
2288 case '\016': /* SO */
2289 case '\017': /* SI */
2290 /*
2291 * Different charsets are hard to handle. Applications
2292 * should use the right alt charset escapes for the
2293 * only reason they still exist: line drawing. The
2294 * rest is incompatible history st should not support.
2295 */
2296 return;
2297 case '\032': /* SUB */
2298 case '\030': /* CAN */
2299 csireset();
2300 return;
2301 case '\005': /* ENQ (IGNORED) */
2302 case '\000': /* NUL (IGNORED) */
2303 case '\021': /* XON (IGNORED) */
2304 case '\023': /* XOFF (IGNORED) */
2305 case 0177: /* DEL (IGNORED) */
2306 return;
2307 }
2308 } else if(term.esc & ESC_START) {
2309 if(term.esc & ESC_CSI) {
2310 csiescseq.buf[csiescseq.len++] = ascii;
2311 if(BETWEEN(ascii, 0x40, 0x7E)
2312 || csiescseq.len >= \
2313 sizeof(csiescseq.buf)-1) {
2314 term.esc = 0;
2315 csiparse();
2316 csihandle();
2317 }
2318 } else if(term.esc & ESC_STR_END) {
2319 term.esc = 0;
2320 if(ascii == '\\')
2321 strhandle();
2322 } else if(term.esc & ESC_ALTCHARSET) {
2323 switch(ascii) {
2324 case '0': /* Line drawing set */
2325 term.c.attr.mode |= ATTR_GFX;
2326 break;
2327 case 'B': /* USASCII */
2328 term.c.attr.mode &= ~ATTR_GFX;
2329 break;
2330 case 'A': /* UK (IGNORED) */
2331 case '<': /* multinational charset (IGNORED) */
2332 case '5': /* Finnish (IGNORED) */
2333 case 'C': /* Finnish (IGNORED) */
2334 case 'K': /* German (IGNORED) */
2335 break;
2336 default:
2337 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2338 }
2339 term.esc = 0;
2340 } else if(term.esc & ESC_TEST) {
2341 if(ascii == '8') { /* DEC screen alignment test. */
2342 char E[UTF_SIZ] = "E";
2343 int x, y;
2344
2345 for(x = 0; x < term.col; ++x) {
2346 for(y = 0; y < term.row; ++y)
2347 tsetchar(E, &term.c.attr, x, y);
2348 }
2349 }
2350 term.esc = 0;
2351 } else {
2352 switch(ascii) {
2353 case '[':
2354 term.esc |= ESC_CSI;
2355 break;
2356 case '#':
2357 term.esc |= ESC_TEST;
2358 break;
2359 case 'P': /* DCS -- Device Control String */
2360 case '_': /* APC -- Application Program Command */
2361 case '^': /* PM -- Privacy Message */
2362 case ']': /* OSC -- Operating System Command */
2363 case 'k': /* old title set compatibility */
2364 strreset();
2365 strescseq.type = ascii;
2366 term.esc |= ESC_STR;
2367 break;
2368 case '(': /* set primary charset G0 */
2369 term.esc |= ESC_ALTCHARSET;
2370 break;
2371 case ')': /* set secondary charset G1 (IGNORED) */
2372 case '*': /* set tertiary charset G2 (IGNORED) */
2373 case '+': /* set quaternary charset G3 (IGNORED) */
2374 term.esc = 0;
2375 break;
2376 case 'D': /* IND -- Linefeed */
2377 if(term.c.y == term.bot) {
2378 tscrollup(term.top, 1);
2379 } else {
2380 tmoveto(term.c.x, term.c.y+1);
2381 }
2382 term.esc = 0;
2383 break;
2384 case 'E': /* NEL -- Next line */
2385 tnewline(1); /* always go to first col */
2386 term.esc = 0;
2387 break;
2388 case 'H': /* HTS -- Horizontal tab stop */
2389 term.tabs[term.c.x] = 1;
2390 term.esc = 0;
2391 break;
2392 case 'M': /* RI -- Reverse index */
2393 if(term.c.y == term.top) {
2394 tscrolldown(term.top, 1);
2395 } else {
2396 tmoveto(term.c.x, term.c.y-1);
2397 }
2398 term.esc = 0;
2399 break;
2400 case 'Z': /* DECID -- Identify Terminal */
2401 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2402 term.esc = 0;
2403 break;
2404 case 'c': /* RIS -- Reset to inital state */
2405 treset();
2406 term.esc = 0;
2407 xresettitle();
2408 break;
2409 case '=': /* DECPAM -- Application keypad */
2410 term.mode |= MODE_APPKEYPAD;
2411 term.esc = 0;
2412 break;
2413 case '>': /* DECPNM -- Normal keypad */
2414 term.mode &= ~MODE_APPKEYPAD;
2415 term.esc = 0;
2416 break;
2417 case '7': /* DECSC -- Save Cursor */
2418 tcursor(CURSOR_SAVE);
2419 term.esc = 0;
2420 break;
2421 case '8': /* DECRC -- Restore Cursor */
2422 tcursor(CURSOR_LOAD);
2423 term.esc = 0;
2424 break;
2425 case '\\': /* ST -- Stop */
2426 term.esc = 0;
2427 break;
2428 default:
2429 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2430 (uchar) ascii, isprint(ascii)? ascii:'.');
2431 term.esc = 0;
2432 }
2433 }
2434 /*
2435 * All characters which form part of a sequence are not
2436 * printed
2437 */
2438 return;
2439 }
2440 /*
2441 * Display control codes only if we are in graphic mode
2442 */
2443 if(control && !(term.c.attr.mode & ATTR_GFX))
2444 return;
2445 if(sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
2446 selclear(NULL);
2447 if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2448 term.line[term.c.y][term.c.x].mode |= ATTR_WRAP;
2449 tnewline(1);
2450 }
2451
2452 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col) {
2453 memmove(&term.line[term.c.y][term.c.x+1],
2454 &term.line[term.c.y][term.c.x],
2455 (term.col - term.c.x - 1) * sizeof(Glyph));
2456 }
2457
2458 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2459 if(term.c.x+1 < term.col) {
2460 tmoveto(term.c.x+1, term.c.y);
2461 } else {
2462 term.c.state |= CURSOR_WRAPNEXT;
2463 }
2464 }
2465
2466 int
2467 tresize(int col, int row) {
2468 int i;
2469 int minrow = MIN(row, term.row);
2470 int mincol = MIN(col, term.col);
2471 int slide = term.c.y - row + 1;
2472 bool *bp;
2473 Line *orig;
2474
2475 if(col < 1 || row < 1)
2476 return 0;
2477
2478 /* free unneeded rows */
2479 i = 0;
2480 if(slide > 0) {
2481 /*
2482 * slide screen to keep cursor where we expect it -
2483 * tscrollup would work here, but we can optimize to
2484 * memmove because we're freeing the earlier lines
2485 */
2486 for(/* i = 0 */; i < slide; i++) {
2487 free(term.line[i]);
2488 free(term.alt[i]);
2489 }
2490 memmove(term.line, term.line + slide, row * sizeof(Line));
2491 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2492 }
2493 for(i += row; i < term.row; i++) {
2494 free(term.line[i]);
2495 free(term.alt[i]);
2496 }
2497
2498 /* resize to new height */
2499 term.line = xrealloc(term.line, row * sizeof(Line));
2500 term.alt = xrealloc(term.alt, row * sizeof(Line));
2501 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2502 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2503
2504 /* resize each row to new width, zero-pad if needed */
2505 for(i = 0; i < minrow; i++) {
2506 term.dirty[i] = 1;
2507 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2508 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2509 }
2510
2511 /* allocate any new rows */
2512 for(/* i == minrow */; i < row; i++) {
2513 term.dirty[i] = 1;
2514 term.line[i] = xcalloc(col, sizeof(Glyph));
2515 term.alt [i] = xcalloc(col, sizeof(Glyph));
2516 }
2517 if(col > term.col) {
2518 bp = term.tabs + term.col;
2519
2520 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2521 while(--bp > term.tabs && !*bp)
2522 /* nothing */ ;
2523 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2524 *bp = 1;
2525 }
2526 /* update terminal size */
2527 term.col = col;
2528 term.row = row;
2529 /* reset scrolling region */
2530 tsetscroll(0, row-1);
2531 /* make use of the LIMIT in tmoveto */
2532 tmoveto(term.c.x, term.c.y);
2533 /* Clearing both screens */
2534 orig = term.line;
2535 do {
2536 if(mincol < col && 0 < minrow) {
2537 tclearregion(mincol, 0, col - 1, minrow - 1);
2538 }
2539 if(0 < col && minrow < row) {
2540 tclearregion(0, minrow, col - 1, row - 1);
2541 }
2542 tswapscreen();
2543 } while(orig != term.line);
2544
2545 return (slide > 0);
2546 }
2547
2548 void
2549 xresize(int col, int row) {
2550 xw.tw = MAX(1, col * xw.cw);
2551 xw.th = MAX(1, row * xw.ch);
2552
2553 XFreePixmap(xw.dpy, xw.buf);
2554 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2555 DefaultDepth(xw.dpy, xw.scr));
2556 XftDrawChange(xw.draw, xw.buf);
2557 xclear(0, 0, xw.w, xw.h);
2558 }
2559
2560 static inline ushort
2561 sixd_to_16bit(int x) {
2562 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2563 }
2564
2565 void
2566 xloadcols(void) {
2567 int i, r, g, b;
2568 XRenderColor color = { .alpha = 0xffff };
2569
2570 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
2571 for(i = 0; i < LEN(colorname); i++) {
2572 if(!colorname[i])
2573 continue;
2574 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2575 die("Could not allocate color '%s'\n", colorname[i]);
2576 }
2577 }
2578
2579 /* load colors [16-255] ; same colors as xterm */
2580 for(i = 16, r = 0; r < 6; r++) {
2581 for(g = 0; g < 6; g++) {
2582 for(b = 0; b < 6; b++) {
2583 color.red = sixd_to_16bit(r);
2584 color.green = sixd_to_16bit(g);
2585 color.blue = sixd_to_16bit(b);
2586 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i])) {
2587 die("Could not allocate color %d\n", i);
2588 }
2589 i++;
2590 }
2591 }
2592 }
2593
2594 for(r = 0; r < 24; r++, i++) {
2595 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
2596 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color,
2597 &dc.col[i])) {
2598 die("Could not allocate color %d\n", i);
2599 }
2600 }
2601 }
2602
2603 int
2604 xsetcolorname(int x, const char *name) {
2605 XRenderColor color = { .alpha = 0xffff };
2606 Colour colour;
2607 if (x < 0 || x > LEN(colorname))
2608 return -1;
2609 if(!name) {
2610 if(16 <= x && x < 16 + 216) {
2611 int r = (x - 16) / 36, g = ((x - 16) % 36) / 6, b = (x - 16) % 6;
2612 color.red = sixd_to_16bit(r);
2613 color.green = sixd_to_16bit(g);
2614 color.blue = sixd_to_16bit(b);
2615 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2616 return 0; /* something went wrong */
2617 dc.col[x] = colour;
2618 return 1;
2619 } else if (16 + 216 <= x && x < 256) {
2620 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (x - (16 + 216));
2621 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2622 return 0; /* something went wrong */
2623 dc.col[x] = colour;
2624 return 1;
2625 } else {
2626 name = colorname[x];
2627 }
2628 }
2629 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &colour))
2630 return 0;
2631 dc.col[x] = colour;
2632 return 1;
2633 }
2634
2635 void
2636 xtermclear(int col1, int row1, int col2, int row2) {
2637 XftDrawRect(xw.draw,
2638 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2639 borderpx + col1 * xw.cw,
2640 borderpx + row1 * xw.ch,
2641 (col2-col1+1) * xw.cw,
2642 (row2-row1+1) * xw.ch);
2643 }
2644
2645 /*
2646 * Absolute coordinates.
2647 */
2648 void
2649 xclear(int x1, int y1, int x2, int y2) {
2650 XftDrawRect(xw.draw,
2651 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2652 x1, y1, x2-x1, y2-y1);
2653 }
2654
2655 void
2656 xhints(void) {
2657 XClassHint class = {opt_class ? opt_class : termname, termname};
2658 XWMHints wm = {.flags = InputHint, .input = 1};
2659 XSizeHints *sizeh = NULL;
2660
2661 sizeh = XAllocSizeHints();
2662 if(xw.isfixed == False) {
2663 sizeh->flags = PSize | PResizeInc | PBaseSize;
2664 sizeh->height = xw.h;
2665 sizeh->width = xw.w;
2666 sizeh->height_inc = xw.ch;
2667 sizeh->width_inc = xw.cw;
2668 sizeh->base_height = 2 * borderpx;
2669 sizeh->base_width = 2 * borderpx;
2670 } else {
2671 sizeh->flags = PMaxSize | PMinSize;
2672 sizeh->min_width = sizeh->max_width = xw.fw;
2673 sizeh->min_height = sizeh->max_height = xw.fh;
2674 }
2675
2676 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
2677 XFree(sizeh);
2678 }
2679
2680 int
2681 xloadfont(Font *f, FcPattern *pattern) {
2682 FcPattern *match;
2683 FcResult result;
2684
2685 match = FcFontMatch(NULL, pattern, &result);
2686 if(!match)
2687 return 1;
2688
2689 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2690 FcPatternDestroy(match);
2691 return 1;
2692 }
2693
2694 f->set = NULL;
2695 f->pattern = FcPatternDuplicate(pattern);
2696
2697 f->ascent = f->match->ascent;
2698 f->descent = f->match->descent;
2699 f->lbearing = 0;
2700 f->rbearing = f->match->max_advance_width;
2701
2702 f->height = f->ascent + f->descent;
2703 f->width = f->lbearing + f->rbearing;
2704
2705 return 0;
2706 }
2707
2708 void
2709 xloadfonts(char *fontstr, int fontsize) {
2710 FcPattern *pattern;
2711 FcResult result;
2712 double fontval;
2713
2714 if(fontstr[0] == '-') {
2715 pattern = XftXlfdParse(fontstr, False, False);
2716 } else {
2717 pattern = FcNameParse((FcChar8 *)fontstr);
2718 }
2719
2720 if(!pattern)
2721 die("st: can't open font %s\n", fontstr);
2722
2723 if(fontsize > 0) {
2724 FcPatternDel(pattern, FC_PIXEL_SIZE);
2725 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2726 usedfontsize = fontsize;
2727 } else {
2728 result = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2729 if(result == FcResultMatch) {
2730 usedfontsize = (int)fontval;
2731 } else {
2732 /*
2733 * Default font size is 12, if none given. This is to
2734 * have a known usedfontsize value.
2735 */
2736 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
2737 usedfontsize = 12;
2738 }
2739 }
2740
2741 FcConfigSubstitute(0, pattern, FcMatchPattern);
2742 FcDefaultSubstitute(pattern);
2743
2744 if(xloadfont(&dc.font, pattern))
2745 die("st: can't open font %s\n", fontstr);
2746
2747 /* Setting character width and height. */
2748 xw.cw = dc.font.width;
2749 xw.ch = dc.font.height;
2750
2751 FcPatternDel(pattern, FC_SLANT);
2752 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
2753 if(xloadfont(&dc.ifont, pattern))
2754 die("st: can't open font %s\n", fontstr);
2755
2756 FcPatternDel(pattern, FC_WEIGHT);
2757 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
2758 if(xloadfont(&dc.ibfont, pattern))
2759 die("st: can't open font %s\n", fontstr);
2760
2761 FcPatternDel(pattern, FC_SLANT);
2762 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
2763 if(xloadfont(&dc.bfont, pattern))
2764 die("st: can't open font %s\n", fontstr);
2765
2766 FcPatternDestroy(pattern);
2767 }
2768
2769 int
2770 xloadfontset(Font *f) {
2771 FcResult result;
2772
2773 if(!(f->set = FcFontSort(0, f->pattern, FcTrue, 0, &result)))
2774 return 1;
2775 return 0;
2776 }
2777
2778 void
2779 xunloadfont(Font *f) {
2780 XftFontClose(xw.dpy, f->match);
2781 FcPatternDestroy(f->pattern);
2782 if(f->set)
2783 FcFontSetDestroy(f->set);
2784 }
2785
2786 void
2787 xunloadfonts(void) {
2788 int i, ip;
2789
2790 /*
2791 * Free the loaded fonts in the font cache. This is done backwards
2792 * from the frccur.
2793 */
2794 for(i = 0, ip = frccur; i < frclen; i++, ip--) {
2795 if(ip < 0)
2796 ip = LEN(frc) - 1;
2797 XftFontClose(xw.dpy, frc[ip].font);
2798 }
2799 frccur = -1;
2800 frclen = 0;
2801
2802 xunloadfont(&dc.font);
2803 xunloadfont(&dc.bfont);
2804 xunloadfont(&dc.ifont);
2805 xunloadfont(&dc.ibfont);
2806 }
2807
2808 void
2809 xzoom(const Arg *arg) {
2810 xunloadfonts();
2811 xloadfonts(usedfont, usedfontsize + arg->i);
2812 cresize(0, 0);
2813 redraw(0);
2814 }
2815
2816 void
2817 xinit(void) {
2818 XGCValues gcvalues;
2819 Cursor cursor;
2820 Window parent;
2821 int sw, sh;
2822
2823 if(!(xw.dpy = XOpenDisplay(NULL)))
2824 die("Can't open display\n");
2825 xw.scr = XDefaultScreen(xw.dpy);
2826 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
2827
2828 /* font */
2829 if(!FcInit())
2830 die("Could not init fontconfig.\n");
2831
2832 usedfont = (opt_font == NULL)? font : opt_font;
2833 xloadfonts(usedfont, 0);
2834
2835 /* colors */
2836 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
2837 xloadcols();
2838
2839 /* adjust fixed window geometry */
2840 if(xw.isfixed) {
2841 sw = DisplayWidth(xw.dpy, xw.scr);
2842 sh = DisplayHeight(xw.dpy, xw.scr);
2843 if(xw.fx < 0)
2844 xw.fx = sw + xw.fx - xw.fw - 1;
2845 if(xw.fy < 0)
2846 xw.fy = sh + xw.fy - xw.fh - 1;
2847
2848 xw.h = xw.fh;
2849 xw.w = xw.fw;
2850 } else {
2851 /* window - default size */
2852 xw.h = 2 * borderpx + term.row * xw.ch;
2853 xw.w = 2 * borderpx + term.col * xw.cw;
2854 xw.fx = 0;
2855 xw.fy = 0;
2856 }
2857
2858 /* Events */
2859 xw.attrs.background_pixel = dc.col[defaultbg].pixel;
2860 xw.attrs.border_pixel = dc.col[defaultbg].pixel;
2861 xw.attrs.bit_gravity = NorthWestGravity;
2862 xw.attrs.event_mask = FocusChangeMask | KeyPressMask
2863 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
2864 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
2865 xw.attrs.colormap = xw.cmap;
2866
2867 parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
2868 XRootWindow(xw.dpy, xw.scr);
2869 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
2870 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
2871 xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
2872 | CWEventMask | CWColormap, &xw.attrs);
2873
2874 memset(&gcvalues, 0, sizeof(gcvalues));
2875 gcvalues.graphics_exposures = False;
2876 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
2877 &gcvalues);
2878 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2879 DefaultDepth(xw.dpy, xw.scr));
2880 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
2881 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
2882
2883 /* Xft rendering context */
2884 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
2885
2886 /* input methods */
2887 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2888 XSetLocaleModifiers("@im=local");
2889 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2890 XSetLocaleModifiers("@im=");
2891 if((xw.xim = XOpenIM(xw.dpy,
2892 NULL, NULL, NULL)) == NULL) {
2893 die("XOpenIM failed. Could not open input"
2894 " device.\n");
2895 }
2896 }
2897 }
2898 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
2899 | XIMStatusNothing, XNClientWindow, xw.win,
2900 XNFocusWindow, xw.win, NULL);
2901 if(xw.xic == NULL)
2902 die("XCreateIC failed. Could not obtain input method.\n");
2903
2904 /* white cursor, black outline */
2905 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
2906 XDefineCursor(xw.dpy, xw.win, cursor);
2907 XRecolorCursor(xw.dpy, cursor,
2908 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
2909 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
2910
2911 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
2912 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
2913 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
2914
2915 xresettitle();
2916 XMapWindow(xw.dpy, xw.win);
2917 xhints();
2918 XSync(xw.dpy, 0);
2919 }
2920
2921 void
2922 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
2923 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
2924 width = charlen * xw.cw, xp, i;
2925 int frp, frcflags;
2926 int u8fl, u8fblen, u8cblen, doesexist;
2927 char *u8c, *u8fs;
2928 long u8char;
2929 Font *font = &dc.font;
2930 FcResult fcres;
2931 FcPattern *fcpattern, *fontpattern;
2932 FcFontSet *fcsets[] = { NULL };
2933 FcCharSet *fccharset;
2934 Colour *fg, *bg, *temp, revfg, revbg;
2935 XRenderColor colfg, colbg;
2936 Rectangle r;
2937
2938 frcflags = FRC_NORMAL;
2939
2940 if(base.mode & ATTR_ITALIC) {
2941 if(base.fg == defaultfg)
2942 base.fg = defaultitalic;
2943 font = &dc.ifont;
2944 frcflags = FRC_ITALIC;
2945 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
2946 if(base.fg == defaultfg)
2947 base.fg = defaultitalic;
2948 font = &dc.ibfont;
2949 frcflags = FRC_ITALICBOLD;
2950 } else if(base.mode & ATTR_UNDERLINE) {
2951 if(base.fg == defaultfg)
2952 base.fg = defaultunderline;
2953 }
2954 fg = &dc.col[base.fg];
2955 bg = &dc.col[base.bg];
2956
2957 if(base.mode & ATTR_BOLD) {
2958 if(BETWEEN(base.fg, 0, 7)) {
2959 /* basic system colors */
2960 fg = &dc.col[base.fg + 8];
2961 } else if(BETWEEN(base.fg, 16, 195)) {
2962 /* 256 colors */
2963 fg = &dc.col[base.fg + 36];
2964 } else if(BETWEEN(base.fg, 232, 251)) {
2965 /* greyscale */
2966 fg = &dc.col[base.fg + 4];
2967 }
2968 /*
2969 * Those ranges will not be brightened:
2970 * 8 - 15 – bright system colors
2971 * 196 - 231 – highest 256 color cube
2972 * 252 - 255 – brightest colors in greyscale
2973 */
2974 font = &dc.bfont;
2975 frcflags = FRC_BOLD;
2976 }
2977
2978 if(IS_SET(MODE_REVERSE)) {
2979 if(fg == &dc.col[defaultfg]) {
2980 fg = &dc.col[defaultbg];
2981 } else {
2982 colfg.red = ~fg->color.red;
2983 colfg.green = ~fg->color.green;
2984 colfg.blue = ~fg->color.blue;
2985 colfg.alpha = fg->color.alpha;
2986 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
2987 fg = &revfg;
2988 }
2989
2990 if(bg == &dc.col[defaultbg]) {
2991 bg = &dc.col[defaultfg];
2992 } else {
2993 colbg.red = ~bg->color.red;
2994 colbg.green = ~bg->color.green;
2995 colbg.blue = ~bg->color.blue;
2996 colbg.alpha = bg->color.alpha;
2997 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &revbg);
2998 bg = &revbg;
2999 }
3000 }
3001
3002 if(base.mode & ATTR_REVERSE) {
3003 temp = fg;
3004 fg = bg;
3005 bg = temp;
3006 }
3007
3008 if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
3009 fg = bg;
3010
3011 /* Intelligent cleaning up of the borders. */
3012 if(x == 0) {
3013 xclear(0, (y == 0)? 0 : winy, borderpx,
3014 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
3015 }
3016 if(x + charlen >= term.col) {
3017 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
3018 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
3019 }
3020 if(y == 0)
3021 xclear(winx, 0, winx + width, borderpx);
3022 if(y == term.row-1)
3023 xclear(winx, winy + xw.ch, winx + width, xw.h);
3024
3025 /* Clean up the region we want to draw to. */
3026 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
3027
3028 /* Set the clip region because Xft is sometimes dirty. */
3029 r.x = 0;
3030 r.y = 0;
3031 r.height = xw.ch;
3032 r.width = width;
3033 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
3034
3035 for(xp = winx; bytelen > 0;) {
3036 /*
3037 * Search for the range in the to be printed string of glyphs
3038 * that are in the main font. Then print that range. If
3039 * some glyph is found that is not in the font, do the
3040 * fallback dance.
3041 */
3042 u8fs = s;
3043 u8fblen = 0;
3044 u8fl = 0;
3045 for(;;) {
3046 u8c = s;
3047 u8cblen = utf8decode(s, &u8char);
3048 s += u8cblen;
3049 bytelen -= u8cblen;
3050
3051 doesexist = XftCharIndex(xw.dpy, font->match, u8char);
3052 if(!doesexist || bytelen <= 0) {
3053 if(bytelen <= 0) {
3054 if(doesexist) {
3055 u8fl++;
3056 u8fblen += u8cblen;
3057 }
3058 }
3059
3060 if(u8fl > 0) {
3061 XftDrawStringUtf8(xw.draw, fg,
3062 font->match, xp,
3063 winy + font->ascent,
3064 (FcChar8 *)u8fs,
3065 u8fblen);
3066 xp += font->width * u8fl;
3067
3068 }
3069 break;
3070 }
3071
3072 u8fl++;
3073 u8fblen += u8cblen;
3074 }
3075 if(doesexist)
3076 break;
3077
3078 frp = frccur;
3079 /* Search the font cache. */
3080 for(i = 0; i < frclen; i++, frp--) {
3081 if(frp <= 0)
3082 frp = LEN(frc) - 1;
3083
3084 if(frc[frp].c == u8char
3085 && frc[frp].flags == frcflags) {
3086 break;
3087 }
3088 }
3089
3090 /* Nothing was found. */
3091 if(i >= frclen) {
3092 if(!font->set)
3093 xloadfontset(font);
3094 fcsets[0] = font->set;
3095
3096 /*
3097 * Nothing was found in the cache. Now use
3098 * some dozen of Fontconfig calls to get the
3099 * font for one single character.
3100 */
3101 fcpattern = FcPatternDuplicate(font->pattern);
3102 fccharset = FcCharSetCreate();
3103
3104 FcCharSetAddChar(fccharset, u8char);
3105 FcPatternAddCharSet(fcpattern, FC_CHARSET,
3106 fccharset);
3107 FcPatternAddBool(fcpattern, FC_SCALABLE,
3108 FcTrue);
3109
3110 FcConfigSubstitute(0, fcpattern,
3111 FcMatchPattern);
3112 FcDefaultSubstitute(fcpattern);
3113
3114 fontpattern = FcFontSetMatch(0, fcsets,
3115 FcTrue, fcpattern, &fcres);
3116
3117 /*
3118 * Overwrite or create the new cache entry.
3119 */
3120 frccur++;
3121 frclen++;
3122 if(frccur >= LEN(frc))
3123 frccur = 0;
3124 if(frclen > LEN(frc)) {
3125 frclen = LEN(frc);
3126 XftFontClose(xw.dpy, frc[frccur].font);
3127 }
3128
3129 frc[frccur].font = XftFontOpenPattern(xw.dpy,
3130 fontpattern);
3131 frc[frccur].c = u8char;
3132 frc[frccur].flags = frcflags;
3133
3134 FcPatternDestroy(fcpattern);
3135 FcCharSetDestroy(fccharset);
3136
3137 frp = frccur;
3138 }
3139
3140 XftDrawStringUtf8(xw.draw, fg, frc[frp].font,
3141 xp, winy + frc[frp].font->ascent,
3142 (FcChar8 *)u8c, u8cblen);
3143
3144 xp += font->width;
3145 }
3146
3147 /*
3148 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
3149 winy + font->ascent, (FcChar8 *)s, bytelen);
3150 */
3151
3152 if(base.mode & ATTR_UNDERLINE) {
3153 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
3154 width, 1);
3155 }
3156
3157 /* Reset clip to none. */
3158 XftDrawSetClip(xw.draw, 0);
3159 }
3160
3161 void
3162 xdrawcursor(void) {
3163 static int oldx = 0, oldy = 0;
3164 int sl;
3165 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
3166
3167 LIMIT(oldx, 0, term.col-1);
3168 LIMIT(oldy, 0, term.row-1);
3169
3170 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
3171
3172 /* remove the old cursor */
3173 sl = utf8size(term.line[oldy][oldx].c);
3174 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
3175 oldy, 1, sl);
3176
3177 /* draw the new one */
3178 if(!(IS_SET(MODE_HIDE))) {
3179 if(xw.state & WIN_FOCUSED) {
3180 if(IS_SET(MODE_REVERSE)) {
3181 g.mode |= ATTR_REVERSE;
3182 g.fg = defaultcs;
3183 g.bg = defaultfg;
3184 }
3185
3186 sl = utf8size(g.c);
3187 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
3188 } else {
3189 XftDrawRect(xw.draw, &dc.col[defaultcs],
3190 borderpx + term.c.x * xw.cw,
3191 borderpx + term.c.y * xw.ch,
3192 xw.cw - 1, 1);
3193 XftDrawRect(xw.draw, &dc.col[defaultcs],
3194 borderpx + term.c.x * xw.cw,
3195 borderpx + term.c.y * xw.ch,
3196 1, xw.ch - 1);
3197 XftDrawRect(xw.draw, &dc.col[defaultcs],
3198 borderpx + (term.c.x + 1) * xw.cw - 1,
3199 borderpx + term.c.y * xw.ch,
3200 1, xw.ch - 1);
3201 XftDrawRect(xw.draw, &dc.col[defaultcs],
3202 borderpx + term.c.x * xw.cw,
3203 borderpx + (term.c.y + 1) * xw.ch - 1,
3204 xw.cw, 1);
3205 }
3206 oldx = term.c.x, oldy = term.c.y;
3207 }
3208 }
3209
3210
3211 void
3212 xsettitle(char *p) {
3213 XTextProperty prop;
3214
3215 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3216 &prop);
3217 XSetWMName(xw.dpy, xw.win, &prop);
3218 }
3219
3220 void
3221 xresettitle(void) {
3222 xsettitle(opt_title ? opt_title : "st");
3223 }
3224
3225 void
3226 redraw(int timeout) {
3227 struct timespec tv = {0, timeout * 1000};
3228
3229 tfulldirt();
3230 draw();
3231
3232 if(timeout > 0) {
3233 nanosleep(&tv, NULL);
3234 XSync(xw.dpy, False); /* necessary for a good tput flash */
3235 }
3236 }
3237
3238 void
3239 draw(void) {
3240 drawregion(0, 0, term.col, term.row);
3241 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3242 xw.h, 0, 0);
3243 XSetForeground(xw.dpy, dc.gc,
3244 dc.col[IS_SET(MODE_REVERSE)?
3245 defaultfg : defaultbg].pixel);
3246 }
3247
3248 void
3249 drawregion(int x1, int y1, int x2, int y2) {
3250 int ic, ib, x, y, ox, sl;
3251 Glyph base, new;
3252 char buf[DRAW_BUF_SIZ];
3253 bool ena_sel = sel.ob.x != -1;
3254
3255 if(sel.alt ^ IS_SET(MODE_ALTSCREEN))
3256 ena_sel = 0;
3257
3258 if(!(xw.state & WIN_VISIBLE))
3259 return;
3260
3261 for(y = y1; y < y2; y++) {
3262 if(!term.dirty[y])
3263 continue;
3264
3265 xtermclear(0, y, term.col, y);
3266 term.dirty[y] = 0;
3267 base = term.line[y][0];
3268 ic = ib = ox = 0;
3269 for(x = x1; x < x2; x++) {
3270 new = term.line[y][x];
3271 if(ena_sel && selected(x, y))
3272 new.mode ^= ATTR_REVERSE;
3273 if(ib > 0 && (ATTRCMP(base, new)
3274 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3275 xdraws(buf, base, ox, y, ic, ib);
3276 ic = ib = 0;
3277 }
3278 if(ib == 0) {
3279 ox = x;
3280 base = new;
3281 }
3282
3283 sl = utf8size(new.c);
3284 memcpy(buf+ib, new.c, sl);
3285 ib += sl;
3286 ++ic;
3287 }
3288 if(ib > 0)
3289 xdraws(buf, base, ox, y, ic, ib);
3290 }
3291 xdrawcursor();
3292 }
3293
3294 void
3295 expose(XEvent *ev) {
3296 XExposeEvent *e = &ev->xexpose;
3297
3298 if(xw.state & WIN_REDRAW) {
3299 if(!e->count)
3300 xw.state &= ~WIN_REDRAW;
3301 }
3302 redraw(0);
3303 }
3304
3305 void
3306 visibility(XEvent *ev) {
3307 XVisibilityEvent *e = &ev->xvisibility;
3308
3309 if(e->state == VisibilityFullyObscured) {
3310 xw.state &= ~WIN_VISIBLE;
3311 } else if(!(xw.state & WIN_VISIBLE)) {
3312 /* need a full redraw for next Expose, not just a buf copy */
3313 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3314 }
3315 }
3316
3317 void
3318 unmap(XEvent *ev) {
3319 xw.state &= ~WIN_VISIBLE;
3320 }
3321
3322 void
3323 xsetpointermotion(int set) {
3324 MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
3325 XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
3326 }
3327
3328 void
3329 xseturgency(int add) {
3330 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3331
3332 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
3333 XSetWMHints(xw.dpy, xw.win, h);
3334 XFree(h);
3335 }
3336
3337 void
3338 focus(XEvent *ev) {
3339 XFocusChangeEvent *e = &ev->xfocus;
3340
3341 if(e->mode == NotifyGrab)
3342 return;
3343
3344 if(ev->type == FocusIn) {
3345 XSetICFocus(xw.xic);
3346 xw.state |= WIN_FOCUSED;
3347 xseturgency(0);
3348 if(IS_SET(MODE_FOCUS))
3349 ttywrite("\033[I", 3);
3350 } else {
3351 XUnsetICFocus(xw.xic);
3352 xw.state &= ~WIN_FOCUSED;
3353 if(IS_SET(MODE_FOCUS))
3354 ttywrite("\033[O", 3);
3355 }
3356 }
3357
3358 static inline bool
3359 match(uint mask, uint state) {
3360 state &= ~ignoremod;
3361
3362 if(mask == XK_NO_MOD && state)
3363 return false;
3364 if(mask != XK_ANY_MOD && mask != XK_NO_MOD && !state)
3365 return false;
3366 if(mask == XK_ANY_MOD)
3367 return true;
3368 return state == mask;
3369 }
3370
3371 void
3372 numlock(const Arg *dummy) {
3373 term.numlock ^= 1;
3374 }
3375
3376 char*
3377 kmap(KeySym k, uint state) {
3378 uint mask;
3379 Key *kp;
3380 int i;
3381
3382 /* Check for mapped keys out of X11 function keys. */
3383 for(i = 0; i < LEN(mappedkeys); i++) {
3384 if(mappedkeys[i] == k)
3385 break;
3386 }
3387 if(i == LEN(mappedkeys)) {
3388 if((k & 0xFFFF) < 0xFD00)
3389 return NULL;
3390 }
3391
3392 for(kp = key; kp < key + LEN(key); kp++) {
3393 mask = kp->mask;
3394
3395 if(kp->k != k)
3396 continue;
3397
3398 if(!match(mask, state))
3399 continue;
3400
3401 if(kp->appkey > 0) {
3402 if(!IS_SET(MODE_APPKEYPAD))
3403 continue;
3404 if(term.numlock && kp->appkey == 2)
3405 continue;
3406 } else if(kp->appkey < 0 && IS_SET(MODE_APPKEYPAD)) {
3407 continue;
3408 }
3409
3410 if((kp->appcursor < 0 && IS_SET(MODE_APPCURSOR)) ||
3411 (kp->appcursor > 0
3412 && !IS_SET(MODE_APPCURSOR))) {
3413 continue;
3414 }
3415
3416 if((kp->crlf < 0 && IS_SET(MODE_CRLF)) ||
3417 (kp->crlf > 0 && !IS_SET(MODE_CRLF))) {
3418 continue;
3419 }
3420
3421 return kp->s;
3422 }
3423
3424 return NULL;
3425 }
3426
3427 void
3428 kpress(XEvent *ev) {
3429 XKeyEvent *e = &ev->xkey;
3430 KeySym ksym;
3431 char xstr[31], buf[32], *customkey, *cp = buf;
3432 int len, ret;
3433 long c;
3434 Status status;
3435 Shortcut *bp;
3436
3437 if(IS_SET(MODE_KBDLOCK))
3438 return;
3439
3440 len = XmbLookupString(xw.xic, e, xstr, sizeof(xstr), &ksym, &status);
3441 e->state &= ~Mod2Mask;
3442 /* 1. shortcuts */
3443 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3444 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3445 bp->func(&(bp->arg));
3446 return;
3447 }
3448 }
3449
3450 /* 2. custom keys from config.h */
3451 if((customkey = kmap(ksym, e->state))) {
3452 len = strlen(customkey);
3453 memcpy(buf, customkey, len);
3454 /* 3. hardcoded (overrides X lookup) */
3455 } else {
3456 if(len == 0)
3457 return;
3458
3459 if(len == 1 && e->state & Mod1Mask) {
3460 if(IS_SET(MODE_8BIT)) {
3461 if(*xstr < 0177) {
3462 c = *xstr | B7;
3463 ret = utf8encode(&c, cp);
3464 cp += ret;
3465 len = 0;
3466 }
3467 } else {
3468 *cp++ = '\033';
3469 }
3470 }
3471
3472 memcpy(cp, xstr, len);
3473 len = cp - buf + len;
3474 }
3475
3476 ttywrite(buf, len);
3477 if(IS_SET(MODE_ECHO))
3478 techo(buf, len);
3479 }
3480
3481
3482 void
3483 cmessage(XEvent *e) {
3484 /*
3485 * See xembed specs
3486 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3487 */
3488 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3489 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3490 xw.state |= WIN_FOCUSED;
3491 xseturgency(0);
3492 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3493 xw.state &= ~WIN_FOCUSED;
3494 }
3495 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3496 /* Send SIGHUP to shell */
3497 kill(pid, SIGHUP);
3498 exit(EXIT_SUCCESS);
3499 }
3500 }
3501
3502 void
3503 cresize(int width, int height) {
3504 int col, row;
3505
3506 if(width != 0)
3507 xw.w = width;
3508 if(height != 0)
3509 xw.h = height;
3510
3511 col = (xw.w - 2 * borderpx) / xw.cw;
3512 row = (xw.h - 2 * borderpx) / xw.ch;
3513
3514 tresize(col, row);
3515 xresize(col, row);
3516 ttyresize();
3517 }
3518
3519 void
3520 resize(XEvent *e) {
3521 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3522 return;
3523
3524 cresize(e->xconfigure.width, e->xconfigure.height);
3525 }
3526
3527 void
3528 run(void) {
3529 XEvent ev;
3530 fd_set rfd;
3531 int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3532 struct timeval drawtimeout, *tv = NULL, now, last, lastblink;
3533
3534 gettimeofday(&lastblink, NULL);
3535 gettimeofday(&last, NULL);
3536
3537 for(xev = actionfps;;) {
3538 FD_ZERO(&rfd);
3539 FD_SET(cmdfd, &rfd);
3540 FD_SET(xfd, &rfd);
3541
3542 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
3543 if(errno == EINTR)
3544 continue;
3545 die("select failed: %s\n", SERRNO);
3546 }
3547 if(FD_ISSET(cmdfd, &rfd)) {
3548 ttyread();
3549 if(blinktimeout) {
3550 blinkset = tattrset(ATTR_BLINK);
3551 if(!blinkset && term.mode & ATTR_BLINK)
3552 term.mode &= ~(MODE_BLINK);
3553 }
3554 }
3555
3556 if(FD_ISSET(xfd, &rfd))
3557 xev = actionfps;
3558
3559 gettimeofday(&now, NULL);
3560 drawtimeout.tv_sec = 0;
3561 drawtimeout.tv_usec = (1000/xfps) * 1000;
3562 tv = &drawtimeout;
3563
3564 dodraw = 0;
3565 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
3566 tsetdirtattr(ATTR_BLINK);
3567 term.mode ^= MODE_BLINK;
3568 gettimeofday(&lastblink, NULL);
3569 dodraw = 1;
3570 }
3571 if(TIMEDIFF(now, last) \
3572 > (xev? (1000/xfps) : (1000/actionfps))) {
3573 dodraw = 1;
3574 last = now;
3575 }
3576
3577 if(dodraw) {
3578 while(XPending(xw.dpy)) {
3579 XNextEvent(xw.dpy, &ev);
3580 if(XFilterEvent(&ev, None))
3581 continue;
3582 if(handler[ev.type])
3583 (handler[ev.type])(&ev);
3584 }
3585
3586 draw();
3587 XFlush(xw.dpy);
3588
3589 if(xev && !FD_ISSET(xfd, &rfd))
3590 xev--;
3591 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
3592 if(blinkset) {
3593 if(TIMEDIFF(now, lastblink) \
3594 > blinktimeout) {
3595 drawtimeout.tv_usec = 1;
3596 } else {
3597 drawtimeout.tv_usec = (1000 * \
3598 (blinktimeout - \
3599 TIMEDIFF(now,
3600 lastblink)));
3601 }
3602 } else {
3603 tv = NULL;
3604 }
3605 }
3606 }
3607 }
3608 }
3609
3610 void
3611 usage(void) {
3612 die("%s " VERSION " (c) 2010-2013 st engineers\n" \
3613 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]" \
3614 " [-t title] [-w windowid] [-e command ...]\n", argv0);
3615 }
3616
3617 int
3618 main(int argc, char *argv[]) {
3619 int bitm, xr, yr;
3620 uint wr, hr;
3621 char *titles;
3622
3623 xw.fw = xw.fh = xw.fx = xw.fy = 0;
3624 xw.isfixed = False;
3625
3626 ARGBEGIN {
3627 case 'a':
3628 allowaltscreen = false;
3629 break;
3630 case 'c':
3631 opt_class = EARGF(usage());
3632 break;
3633 case 'e':
3634 /* eat all remaining arguments */
3635 if(argc > 1) {
3636 opt_cmd = &argv[1];
3637 if(argv[1] != NULL && opt_title == NULL) {
3638 titles = strdup(argv[1]);
3639 opt_title = basename(titles);
3640 }
3641 }
3642 goto run;
3643 case 'f':
3644 opt_font = EARGF(usage());
3645 break;
3646 case 'g':
3647 bitm = XParseGeometry(EARGF(usage()), &xr, &yr, &wr, &hr);
3648 if(bitm & XValue)
3649 xw.fx = xr;
3650 if(bitm & YValue)
3651 xw.fy = yr;
3652 if(bitm & WidthValue)
3653 xw.fw = (int)wr;
3654 if(bitm & HeightValue)
3655 xw.fh = (int)hr;
3656 if(bitm & XNegative && xw.fx == 0)
3657 xw.fx = -1;
3658 if(bitm & XNegative && xw.fy == 0)
3659 xw.fy = -1;
3660
3661 if(xw.fh != 0 && xw.fw != 0)
3662 xw.isfixed = True;
3663 break;
3664 case 'o':
3665 opt_io = EARGF(usage());
3666 break;
3667 case 't':
3668 opt_title = EARGF(usage());
3669 break;
3670 case 'w':
3671 opt_embed = EARGF(usage());
3672 break;
3673 case 'v':
3674 default:
3675 usage();
3676 } ARGEND;
3677
3678 run:
3679 setlocale(LC_CTYPE, "");
3680 XSetLocaleModifiers("");
3681 tnew(80, 24);
3682 xinit();
3683 ttynew();
3684 selinit();
3685 if(xw.isfixed)
3686 cresize(xw.h, xw.w);
3687 run();
3688
3689 return 0;
3690 }
3691