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