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Removing the warning about extents.
[st.git] / st.c
1 /* See LICENSE for licence details. */
2 #define _XOPEN_SOURCE 600
3 #include <ctype.h>
4 #include <errno.h>
5 #include <fcntl.h>
6 #include <limits.h>
7 #include <locale.h>
8 #include <pwd.h>
9 #include <stdarg.h>
10 #include <stdbool.h>
11 #include <stdio.h>
12 #include <stdlib.h>
13 #include <string.h>
14 #include <signal.h>
15 #include <sys/ioctl.h>
16 #include <sys/select.h>
17 #include <sys/stat.h>
18 #include <sys/time.h>
19 #include <sys/types.h>
20 #include <sys/wait.h>
21 #include <time.h>
22 #include <unistd.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/extensions/Xdbe.h>
29 #include <X11/Xft/Xft.h>
30 #include <fontconfig/fontconfig.h>
31
32 #define Glyph Glyph_
33 #define Font Font_
34 #define Draw XftDraw *
35 #define Colour XftColor
36 #define Colourmap Colormap
37
38 #if defined(__linux)
39 #include <pty.h>
40 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
41 #include <util.h>
42 #elif defined(__FreeBSD__) || defined(__DragonFly__)
43 #include <libutil.h>
44 #endif
45
46 #define USAGE \
47 "st " VERSION " (c) 2010-2012 st engineers\n" \
48 "usage: st [-v] [-c class] [-f font] [-g geometry] [-o file]" \
49 " [-t title] [-w windowid] [-e command ...]\n"
50
51 /* XEMBED messages */
52 #define XEMBED_FOCUS_IN 4
53 #define XEMBED_FOCUS_OUT 5
54
55 /* Arbitrary sizes */
56 #define ESC_BUF_SIZ 256
57 #define ESC_ARG_SIZ 16
58 #define STR_BUF_SIZ 256
59 #define STR_ARG_SIZ 16
60 #define DRAW_BUF_SIZ 20*1024
61 #define UTF_SIZ 4
62 #define XK_ANY_MOD UINT_MAX
63 #define XK_NO_MOD 0
64
65 #define REDRAW_TIMEOUT (80*1000) /* 80 ms */
66
67 /* macros */
68 #define SERRNO strerror(errno)
69 #define MIN(a, b) ((a) < (b) ? (a) : (b))
70 #define MAX(a, b) ((a) < (b) ? (b) : (a))
71 #define LEN(a) (sizeof(a) / sizeof(a[0]))
72 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
73 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
74 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
75 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
76 #define IS_SET(flag) ((term.mode & (flag)) != 0)
77 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_usec-t2.tv_usec)/1000)
78
79 #define VT102ID "\033[?6c"
80
81 enum glyph_attribute {
82 ATTR_NULL = 0,
83 ATTR_REVERSE = 1,
84 ATTR_UNDERLINE = 2,
85 ATTR_BOLD = 4,
86 ATTR_GFX = 8,
87 ATTR_ITALIC = 16,
88 ATTR_BLINK = 32,
89 };
90
91 enum cursor_movement {
92 CURSOR_SAVE,
93 CURSOR_LOAD
94 };
95
96 enum cursor_state {
97 CURSOR_DEFAULT = 0,
98 CURSOR_WRAPNEXT = 1,
99 CURSOR_ORIGIN = 2
100 };
101
102 enum glyph_state {
103 GLYPH_SET = 1,
104 GLYPH_DIRTY = 2
105 };
106
107 enum term_mode {
108 MODE_WRAP = 1,
109 MODE_INSERT = 2,
110 MODE_APPKEYPAD = 4,
111 MODE_ALTSCREEN = 8,
112 MODE_CRLF = 16,
113 MODE_MOUSEBTN = 32,
114 MODE_MOUSEMOTION = 64,
115 MODE_MOUSE = 32|64,
116 MODE_REVERSE = 128,
117 MODE_KBDLOCK = 256,
118 MODE_HIDE = 512,
119 MODE_ECHO = 1024,
120 MODE_APPCURSOR = 2048
121 };
122
123 enum escape_state {
124 ESC_START = 1,
125 ESC_CSI = 2,
126 ESC_STR = 4, /* DSC, OSC, PM, APC */
127 ESC_ALTCHARSET = 8,
128 ESC_STR_END = 16, /* a final string was encountered */
129 ESC_TEST = 32, /* Enter in test mode */
130 };
131
132 enum window_state {
133 WIN_VISIBLE = 1,
134 WIN_REDRAW = 2,
135 WIN_FOCUSED = 4
136 };
137
138 /* bit macro */
139 #undef B0
140 enum { B0=1, B1=2, B2=4, B3=8, B4=16, B5=32, B6=64, B7=128 };
141
142 typedef unsigned char uchar;
143 typedef unsigned int uint;
144 typedef unsigned long ulong;
145 typedef unsigned short ushort;
146
147 typedef struct {
148 char c[UTF_SIZ]; /* character code */
149 uchar mode; /* attribute flags */
150 ushort fg; /* foreground */
151 ushort bg; /* background */
152 uchar state; /* state flags */
153 } Glyph;
154
155 typedef Glyph* Line;
156
157 typedef struct {
158 Glyph attr; /* current char attributes */
159 int x;
160 int y;
161 char state;
162 } TCursor;
163
164 /* CSI Escape sequence structs */
165 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
166 typedef struct {
167 char buf[ESC_BUF_SIZ]; /* raw string */
168 int len; /* raw string length */
169 char priv;
170 int arg[ESC_ARG_SIZ];
171 int narg; /* nb of args */
172 char mode;
173 } CSIEscape;
174
175 /* STR Escape sequence structs */
176 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
177 typedef struct {
178 char type; /* ESC type ... */
179 char buf[STR_BUF_SIZ]; /* raw string */
180 int len; /* raw string length */
181 char *args[STR_ARG_SIZ];
182 int narg; /* nb of args */
183 } STREscape;
184
185 /* Internal representation of the screen */
186 typedef struct {
187 int row; /* nb row */
188 int col; /* nb col */
189 Line *line; /* screen */
190 Line *alt; /* alternate screen */
191 bool *dirty; /* dirtyness of lines */
192 TCursor c; /* cursor */
193 int top; /* top scroll limit */
194 int bot; /* bottom scroll limit */
195 int mode; /* terminal mode flags */
196 int esc; /* escape state flags */
197 bool numlock; /* lock numbers in keyboard */
198 bool *tabs;
199 } Term;
200
201 /* Purely graphic info */
202 typedef struct {
203 Display *dpy;
204 Colourmap cmap;
205 Window win;
206 XdbeBackBuffer buf;
207 Atom xembed, wmdeletewin;
208 XIM xim;
209 XIC xic;
210 Draw draw;
211 Visual *vis;
212 int scr;
213 bool isfixed; /* is fixed geometry? */
214 int fx, fy, fw, fh; /* fixed geometry */
215 int tw, th; /* tty width and height */
216 int w; /* window width */
217 int h; /* window height */
218 int ch; /* char height */
219 int cw; /* char width */
220 char state; /* focus, redraw, visible */
221 } XWindow;
222
223 typedef struct {
224 KeySym k;
225 uint mask;
226 char s[ESC_BUF_SIZ];
227 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
228 signed char appkey; /* application keypad */
229 signed char appcursor; /* application cursor */
230 signed char crlf; /* crlf mode */
231 } Key;
232
233 /* TODO: use better name for vars... */
234 typedef struct {
235 int mode;
236 int bx, by;
237 int ex, ey;
238 struct {
239 int x, y;
240 } b, e;
241 char *clip;
242 Atom xtarget;
243 bool alt;
244 struct timeval tclick1;
245 struct timeval tclick2;
246 } Selection;
247
248 typedef union {
249 int i;
250 unsigned int ui;
251 float f;
252 const void *v;
253 } Arg;
254
255 typedef struct {
256 unsigned int mod;
257 KeySym keysym;
258 void (*func)(const Arg *);
259 const Arg arg;
260 } Shortcut;
261
262 /* function definitions used in config.h */
263 static void xzoom(const Arg *);
264 static void selpaste(const Arg *);
265 static void numlock(const Arg *);
266
267 /* Config.h for applying patches and the configuration. */
268 #include "config.h"
269
270 /* Font structure */
271 typedef struct {
272 int height;
273 int width;
274 int ascent;
275 int descent;
276 short lbearing;
277 short rbearing;
278 XftFont *match;
279 FcFontSet *set;
280 FcPattern *pattern;
281 } Font;
282
283 /* Drawing Context */
284 typedef struct {
285 Colour col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
286 Font font, bfont, ifont, ibfont;
287 } DC;
288
289 static void die(const char *, ...);
290 static void draw(void);
291 static void redraw(void);
292 static void drawregion(int, int, int, int);
293 static void execsh(void);
294 static void sigchld(int);
295 static void run(void);
296
297 static void csidump(void);
298 static void csihandle(void);
299 static void csiparse(void);
300 static void csireset(void);
301 static void strdump(void);
302 static void strhandle(void);
303 static void strparse(void);
304 static void strreset(void);
305
306 static void tclearregion(int, int, int, int);
307 static void tcursor(int);
308 static void tdeletechar(int);
309 static void tdeleteline(int);
310 static void tinsertblank(int);
311 static void tinsertblankline(int);
312 static void tmoveto(int, int);
313 static void tmoveato(int x, int y);
314 static void tnew(int, int);
315 static void tnewline(int);
316 static void tputtab(bool);
317 static void tputc(char *, int);
318 static void treset(void);
319 static int tresize(int, int);
320 static void tscrollup(int, int);
321 static void tscrolldown(int, int);
322 static void tsetattr(int*, int);
323 static void tsetchar(char *, Glyph *, int, int);
324 static void tsetscroll(int, int);
325 static void tswapscreen(void);
326 static void tsetdirt(int, int);
327 static void tsetmode(bool, bool, int *, int);
328 static void tfulldirt(void);
329 static void techo(char *, int);
330
331 static inline bool match(uint, uint);
332 static void ttynew(void);
333 static void ttyread(void);
334 static void ttyresize(void);
335 static void ttywrite(const char *, size_t);
336
337 static void xdraws(char *, Glyph, int, int, int, int);
338 static void xhints(void);
339 static void xclear(int, int, int, int);
340 static void xdrawcursor(void);
341 static void xinit(void);
342 static void xloadcols(void);
343 static int xloadfont(Font *, FcPattern *);
344 static void xloadfonts(char *, int);
345 static void xresettitle(void);
346 static void xseturgency(int);
347 static void xsetsel(char*);
348 static void xtermclear(int, int, int, int);
349 static void xunloadfonts(void);
350 static void xresize(int, int);
351
352 static void expose(XEvent *);
353 static void visibility(XEvent *);
354 static void unmap(XEvent *);
355 static char *kmap(KeySym, uint);
356 static void kpress(XEvent *);
357 static void cmessage(XEvent *);
358 static void cresize(int, int);
359 static void resize(XEvent *);
360 static void focus(XEvent *);
361 static void brelease(XEvent *);
362 static void bpress(XEvent *);
363 static void bmotion(XEvent *);
364 static void selnotify(XEvent *);
365 static void selclear(XEvent *);
366 static void selrequest(XEvent *);
367
368 static void selinit(void);
369 static inline bool selected(int, int);
370 static void selcopy(void);
371 static void selscroll(int, int);
372
373 static int utf8decode(char *, long *);
374 static int utf8encode(long *, char *);
375 static int utf8size(char *);
376 static int isfullutf8(char *, int);
377
378 static ssize_t xwrite(int, char *, size_t);
379 static void *xmalloc(size_t);
380 static void *xrealloc(void *, size_t);
381 static void *xcalloc(size_t, size_t);
382
383 static void (*handler[LASTEvent])(XEvent *) = {
384 [KeyPress] = kpress,
385 [ClientMessage] = cmessage,
386 [ConfigureNotify] = resize,
387 [VisibilityNotify] = visibility,
388 [UnmapNotify] = unmap,
389 [Expose] = expose,
390 [FocusIn] = focus,
391 [FocusOut] = focus,
392 [MotionNotify] = bmotion,
393 [ButtonPress] = bpress,
394 [ButtonRelease] = brelease,
395 [SelectionClear] = selclear,
396 [SelectionNotify] = selnotify,
397 [SelectionRequest] = selrequest,
398 };
399
400 /* Globals */
401 static DC dc;
402 static XWindow xw;
403 static Term term;
404 static CSIEscape csiescseq;
405 static STREscape strescseq;
406 static int cmdfd;
407 static pid_t pid;
408 static Selection sel;
409 static int iofd = -1;
410 static char **opt_cmd = NULL;
411 static char *opt_io = NULL;
412 static char *opt_title = NULL;
413 static char *opt_embed = NULL;
414 static char *opt_class = NULL;
415 static char *opt_font = NULL;
416
417 static char *usedfont = NULL;
418 static int usedfontsize = 0;
419
420 /* Font Ring Cache */
421 enum {
422 FRC_NORMAL,
423 FRC_ITALIC,
424 FRC_BOLD,
425 FRC_ITALICBOLD
426 };
427
428 typedef struct {
429 XftFont *font;
430 long c;
431 int flags;
432 } Fontcache;
433
434 /*
435 * Fontcache is a ring buffer, with frccur as current position and frclen as
436 * the current length of used elements.
437 */
438
439 static Fontcache frc[256];
440 static int frccur = -1, frclen = 0;
441
442 ssize_t
443 xwrite(int fd, char *s, size_t len) {
444 size_t aux = len;
445
446 while(len > 0) {
447 ssize_t r = write(fd, s, len);
448 if(r < 0)
449 return r;
450 len -= r;
451 s += r;
452 }
453 return aux;
454 }
455
456 void *
457 xmalloc(size_t len) {
458 void *p = malloc(len);
459
460 if(!p)
461 die("Out of memory\n");
462
463 return p;
464 }
465
466 void *
467 xrealloc(void *p, size_t len) {
468 if((p = realloc(p, len)) == NULL)
469 die("Out of memory\n");
470
471 return p;
472 }
473
474 void *
475 xcalloc(size_t nmemb, size_t size) {
476 void *p = calloc(nmemb, size);
477
478 if(!p)
479 die("Out of memory\n");
480
481 return p;
482 }
483
484 int
485 utf8decode(char *s, long *u) {
486 uchar c;
487 int i, n, rtn;
488
489 rtn = 1;
490 c = *s;
491 if(~c & B7) { /* 0xxxxxxx */
492 *u = c;
493 return rtn;
494 } else if((c & (B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */
495 *u = c&(B4|B3|B2|B1|B0);
496 n = 1;
497 } else if((c & (B7|B6|B5|B4)) == (B7|B6|B5)) { /* 1110xxxx */
498 *u = c&(B3|B2|B1|B0);
499 n = 2;
500 } else if((c & (B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) { /* 11110xxx */
501 *u = c & (B2|B1|B0);
502 n = 3;
503 } else {
504 goto invalid;
505 }
506
507 for(i = n, ++s; i > 0; --i, ++rtn, ++s) {
508 c = *s;
509 if((c & (B7|B6)) != B7) /* 10xxxxxx */
510 goto invalid;
511 *u <<= 6;
512 *u |= c & (B5|B4|B3|B2|B1|B0);
513 }
514
515 if((n == 1 && *u < 0x80) ||
516 (n == 2 && *u < 0x800) ||
517 (n == 3 && *u < 0x10000) ||
518 (*u >= 0xD800 && *u <= 0xDFFF)) {
519 goto invalid;
520 }
521
522 return rtn;
523 invalid:
524 *u = 0xFFFD;
525
526 return rtn;
527 }
528
529 int
530 utf8encode(long *u, char *s) {
531 uchar *sp;
532 ulong uc;
533 int i, n;
534
535 sp = (uchar *)s;
536 uc = *u;
537 if(uc < 0x80) {
538 *sp = uc; /* 0xxxxxxx */
539 return 1;
540 } else if(*u < 0x800) {
541 *sp = (uc >> 6) | (B7|B6); /* 110xxxxx */
542 n = 1;
543 } else if(uc < 0x10000) {
544 *sp = (uc >> 12) | (B7|B6|B5); /* 1110xxxx */
545 n = 2;
546 } else if(uc <= 0x10FFFF) {
547 *sp = (uc >> 18) | (B7|B6|B5|B4); /* 11110xxx */
548 n = 3;
549 } else {
550 goto invalid;
551 }
552
553 for(i=n,++sp; i>0; --i,++sp)
554 *sp = ((uc >> 6*(i-1)) & (B5|B4|B3|B2|B1|B0)) | B7; /* 10xxxxxx */
555
556 return n+1;
557 invalid:
558 /* U+FFFD */
559 *s++ = '\xEF';
560 *s++ = '\xBF';
561 *s = '\xBD';
562
563 return 3;
564 }
565
566 /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
567 UTF-8 otherwise return 0 */
568 int
569 isfullutf8(char *s, int b) {
570 uchar *c1, *c2, *c3;
571
572 c1 = (uchar *)s;
573 c2 = (uchar *)++s;
574 c3 = (uchar *)++s;
575 if(b < 1) {
576 return 0;
577 } else if((*c1&(B7|B6|B5)) == (B7|B6) && b == 1) {
578 return 0;
579 } else if((*c1&(B7|B6|B5|B4)) == (B7|B6|B5) &&
580 ((b == 1) ||
581 ((b == 2) && (*c2&(B7|B6)) == B7))) {
582 return 0;
583 } else if((*c1&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4) &&
584 ((b == 1) ||
585 ((b == 2) && (*c2&(B7|B6)) == B7) ||
586 ((b == 3) && (*c2&(B7|B6)) == B7 && (*c3&(B7|B6)) == B7))) {
587 return 0;
588 } else {
589 return 1;
590 }
591 }
592
593 int
594 utf8size(char *s) {
595 uchar c = *s;
596
597 if(~c&B7) {
598 return 1;
599 } else if((c&(B7|B6|B5)) == (B7|B6)) {
600 return 2;
601 } else if((c&(B7|B6|B5|B4)) == (B7|B6|B5)) {
602 return 3;
603 } else {
604 return 4;
605 }
606 }
607
608 void
609 selinit(void) {
610 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
611 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
612 sel.mode = 0;
613 sel.bx = -1;
614 sel.clip = NULL;
615 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
616 if(sel.xtarget == None)
617 sel.xtarget = XA_STRING;
618 }
619
620 static int
621 x2col(int x) {
622 x -= borderpx;
623 x /= xw.cw;
624
625 return LIMIT(x, 0, term.col-1);
626 }
627
628 static int
629 y2row(int y) {
630 y -= borderpx;
631 y /= xw.ch;
632
633 return LIMIT(y, 0, term.row-1);
634 }
635
636 static inline bool
637 selected(int x, int y) {
638 int bx, ex;
639
640 if(sel.ey == y && sel.by == y) {
641 bx = MIN(sel.bx, sel.ex);
642 ex = MAX(sel.bx, sel.ex);
643 return BETWEEN(x, bx, ex);
644 }
645
646 return ((sel.b.y < y && y < sel.e.y)
647 || (y == sel.e.y && x <= sel.e.x))
648 || (y == sel.b.y && x >= sel.b.x
649 && (x <= sel.e.x || sel.b.y != sel.e.y));
650 }
651
652 void
653 getbuttoninfo(XEvent *e) {
654 sel.alt = IS_SET(MODE_ALTSCREEN);
655
656 sel.ex = x2col(e->xbutton.x);
657 sel.ey = y2row(e->xbutton.y);
658
659 sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
660 sel.b.y = MIN(sel.by, sel.ey);
661 sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
662 sel.e.y = MAX(sel.by, sel.ey);
663 }
664
665 void
666 mousereport(XEvent *e) {
667 int x = x2col(e->xbutton.x);
668 int y = y2row(e->xbutton.y);
669 int button = e->xbutton.button;
670 int state = e->xbutton.state;
671 char buf[] = { '\033', '[', 'M', 0, 32+x+1, 32+y+1 };
672 static int ob, ox, oy;
673
674 /* from urxvt */
675 if(e->xbutton.type == MotionNotify) {
676 if(!IS_SET(MODE_MOUSEMOTION) || (x == ox && y == oy))
677 return;
678 button = ob + 32;
679 ox = x, oy = y;
680 } else if(e->xbutton.type == ButtonRelease || button == AnyButton) {
681 button = 3;
682 } else {
683 button -= Button1;
684 if(button >= 3)
685 button += 64 - 3;
686 if(e->xbutton.type == ButtonPress) {
687 ob = button;
688 ox = x, oy = y;
689 }
690 }
691
692 buf[3] = 32 + button + (state & ShiftMask ? 4 : 0)
693 + (state & Mod4Mask ? 8 : 0)
694 + (state & ControlMask ? 16 : 0);
695
696 ttywrite(buf, sizeof(buf));
697 }
698
699 void
700 bpress(XEvent *e) {
701 if(IS_SET(MODE_MOUSE)) {
702 mousereport(e);
703 } else if(e->xbutton.button == Button1) {
704 if(sel.bx != -1) {
705 sel.bx = -1;
706 tsetdirt(sel.b.y, sel.e.y);
707 draw();
708 }
709 sel.mode = 1;
710 sel.ex = sel.bx = x2col(e->xbutton.x);
711 sel.ey = sel.by = y2row(e->xbutton.y);
712 } else if(e->xbutton.button == Button4) {
713 ttywrite("\031", 1);
714 } else if(e->xbutton.button == Button5) {
715 ttywrite("\005", 1);
716 }
717 }
718
719 void
720 selcopy(void) {
721 char *str, *ptr, *p;
722 int x, y, bufsize, is_selected = 0, size;
723 Glyph *gp, *last;
724
725 if(sel.bx == -1) {
726 str = NULL;
727 } else {
728 bufsize = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
729 ptr = str = xmalloc(bufsize);
730
731 /* append every set & selected glyph to the selection */
732 for(y = 0; y < term.row; y++) {
733 gp = &term.line[y][0];
734 last = gp + term.col;
735
736 while(--last >= gp && !(last->state & GLYPH_SET))
737 /* nothing */;
738
739 for(x = 0; gp <= last; x++, ++gp) {
740 if(!(is_selected = selected(x, y)))
741 continue;
742
743 p = (gp->state & GLYPH_SET) ? gp->c : " ";
744 size = utf8size(p);
745 memcpy(ptr, p, size);
746 ptr += size;
747 }
748 /* \n at the end of every selected line except for the last one */
749 if(is_selected && y < sel.e.y)
750 *ptr++ = '\n';
751 }
752 *ptr = 0;
753 }
754 xsetsel(str);
755 }
756
757 void
758 selnotify(XEvent *e) {
759 ulong nitems, ofs, rem;
760 int format;
761 uchar *data;
762 Atom type;
763
764 ofs = 0;
765 do {
766 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
767 False, AnyPropertyType, &type, &format,
768 &nitems, &rem, &data)) {
769 fprintf(stderr, "Clipboard allocation failed\n");
770 return;
771 }
772 ttywrite((const char *) data, nitems * format / 8);
773 XFree(data);
774 /* number of 32-bit chunks returned */
775 ofs += nitems * format / 32;
776 } while(rem > 0);
777 }
778
779 void
780 selpaste(const Arg *dummy) {
781 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
782 xw.win, CurrentTime);
783 }
784
785 void selclear(XEvent *e) {
786 if(sel.bx == -1)
787 return;
788 sel.bx = -1;
789 tsetdirt(sel.b.y, sel.e.y);
790 }
791
792 void
793 selrequest(XEvent *e) {
794 XSelectionRequestEvent *xsre;
795 XSelectionEvent xev;
796 Atom xa_targets, string;
797
798 xsre = (XSelectionRequestEvent *) e;
799 xev.type = SelectionNotify;
800 xev.requestor = xsre->requestor;
801 xev.selection = xsre->selection;
802 xev.target = xsre->target;
803 xev.time = xsre->time;
804 /* reject */
805 xev.property = None;
806
807 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
808 if(xsre->target == xa_targets) {
809 /* respond with the supported type */
810 string = sel.xtarget;
811 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
812 XA_ATOM, 32, PropModeReplace,
813 (uchar *) &string, 1);
814 xev.property = xsre->property;
815 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
816 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
817 xsre->target, 8, PropModeReplace,
818 (uchar *) sel.clip, strlen(sel.clip));
819 xev.property = xsre->property;
820 }
821
822 /* all done, send a notification to the listener */
823 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
824 fprintf(stderr, "Error sending SelectionNotify event\n");
825 }
826
827 void
828 xsetsel(char *str) {
829 /* register the selection for both the clipboard and the primary */
830 Atom clipboard;
831
832 free(sel.clip);
833 sel.clip = str;
834
835 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
836
837 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
838 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
839 }
840
841 void
842 brelease(XEvent *e) {
843 struct timeval now;
844
845 if(IS_SET(MODE_MOUSE)) {
846 mousereport(e);
847 return;
848 }
849
850 if(e->xbutton.button == Button2) {
851 selpaste(NULL);
852 } else if(e->xbutton.button == Button1) {
853 sel.mode = 0;
854 getbuttoninfo(e);
855 term.dirty[sel.ey] = 1;
856 if(sel.bx == sel.ex && sel.by == sel.ey) {
857 sel.bx = -1;
858 gettimeofday(&now, NULL);
859
860 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
861 /* triple click on the line */
862 sel.b.x = sel.bx = 0;
863 sel.e.x = sel.ex = term.col;
864 sel.b.y = sel.e.y = sel.ey;
865 selcopy();
866 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
867 /* double click to select word */
868 sel.bx = sel.ex;
869 while(sel.bx > 0 && term.line[sel.ey][sel.bx-1].state & GLYPH_SET &&
870 term.line[sel.ey][sel.bx-1].c[0] != ' ') {
871 sel.bx--;
872 }
873 sel.b.x = sel.bx;
874 while(sel.ex < term.col-1 && term.line[sel.ey][sel.ex+1].state & GLYPH_SET &&
875 term.line[sel.ey][sel.ex+1].c[0] != ' ') {
876 sel.ex++;
877 }
878 sel.e.x = sel.ex;
879 sel.b.y = sel.e.y = sel.ey;
880 selcopy();
881 }
882 } else {
883 selcopy();
884 }
885 }
886
887 memcpy(&sel.tclick2, &sel.tclick1, sizeof(struct timeval));
888 gettimeofday(&sel.tclick1, NULL);
889 }
890
891 void
892 bmotion(XEvent *e) {
893 int starty, endy, oldey, oldex;
894
895 if(IS_SET(MODE_MOUSE)) {
896 mousereport(e);
897 return;
898 }
899
900 if(!sel.mode)
901 return;
902
903 oldey = sel.ey;
904 oldex = sel.ex;
905 getbuttoninfo(e);
906
907 if(oldey != sel.ey || oldex != sel.ex) {
908 starty = MIN(oldey, sel.ey);
909 endy = MAX(oldey, sel.ey);
910 tsetdirt(starty, endy);
911 }
912 }
913
914 void
915 die(const char *errstr, ...) {
916 va_list ap;
917
918 va_start(ap, errstr);
919 vfprintf(stderr, errstr, ap);
920 va_end(ap);
921 exit(EXIT_FAILURE);
922 }
923
924 void
925 execsh(void) {
926 char **args;
927 char *envshell = getenv("SHELL");
928 const struct passwd *pass = getpwuid(getuid());
929 char buf[sizeof(long) * 8 + 1];
930
931 unsetenv("COLUMNS");
932 unsetenv("LINES");
933 unsetenv("TERMCAP");
934
935 if(pass) {
936 setenv("LOGNAME", pass->pw_name, 1);
937 setenv("USER", pass->pw_name, 1);
938 setenv("SHELL", pass->pw_shell, 0);
939 setenv("HOME", pass->pw_dir, 0);
940 }
941
942 snprintf(buf, sizeof(buf), "%lu", xw.win);
943 setenv("WINDOWID", buf, 1);
944
945 signal(SIGCHLD, SIG_DFL);
946 signal(SIGHUP, SIG_DFL);
947 signal(SIGINT, SIG_DFL);
948 signal(SIGQUIT, SIG_DFL);
949 signal(SIGTERM, SIG_DFL);
950 signal(SIGALRM, SIG_DFL);
951
952 DEFAULT(envshell, shell);
953 setenv("TERM", termname, 1);
954 args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
955 execvp(args[0], args);
956 exit(EXIT_FAILURE);
957 }
958
959 void
960 sigchld(int a) {
961 int stat = 0;
962
963 if(waitpid(pid, &stat, 0) < 0)
964 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
965
966 if(WIFEXITED(stat)) {
967 exit(WEXITSTATUS(stat));
968 } else {
969 exit(EXIT_FAILURE);
970 }
971 }
972
973 void
974 ttynew(void) {
975 int m, s;
976 struct winsize w = {term.row, term.col, 0, 0};
977
978 /* seems to work fine on linux, openbsd and freebsd */
979 if(openpty(&m, &s, NULL, NULL, &w) < 0)
980 die("openpty failed: %s\n", SERRNO);
981
982 switch(pid = fork()) {
983 case -1:
984 die("fork failed\n");
985 break;
986 case 0:
987 setsid(); /* create a new process group */
988 dup2(s, STDIN_FILENO);
989 dup2(s, STDOUT_FILENO);
990 dup2(s, STDERR_FILENO);
991 if(ioctl(s, TIOCSCTTY, NULL) < 0)
992 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
993 close(s);
994 close(m);
995 execsh();
996 break;
997 default:
998 close(s);
999 cmdfd = m;
1000 signal(SIGCHLD, sigchld);
1001 if(opt_io) {
1002 iofd = (!strcmp(opt_io, "-")) ?
1003 STDOUT_FILENO :
1004 open(opt_io, O_WRONLY | O_CREAT, 0666);
1005 if(iofd < 0) {
1006 fprintf(stderr, "Error opening %s:%s\n",
1007 opt_io, strerror(errno));
1008 }
1009 }
1010 }
1011 }
1012
1013 void
1014 dump(char c) {
1015 static int col;
1016
1017 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
1018 if(++col % 10 == 0)
1019 fprintf(stderr, "\n");
1020 }
1021
1022 void
1023 ttyread(void) {
1024 static char buf[BUFSIZ];
1025 static int buflen = 0;
1026 char *ptr;
1027 char s[UTF_SIZ];
1028 int charsize; /* size of utf8 char in bytes */
1029 long utf8c;
1030 int ret;
1031
1032 /* append read bytes to unprocessed bytes */
1033 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1034 die("Couldn't read from shell: %s\n", SERRNO);
1035
1036 /* process every complete utf8 char */
1037 buflen += ret;
1038 ptr = buf;
1039 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
1040 charsize = utf8decode(ptr, &utf8c);
1041 utf8encode(&utf8c, s);
1042 tputc(s, charsize);
1043 ptr += charsize;
1044 buflen -= charsize;
1045 }
1046
1047 /* keep any uncomplete utf8 char for the next call */
1048 memmove(buf, ptr, buflen);
1049 }
1050
1051 void
1052 ttywrite(const char *s, size_t n) {
1053 if(write(cmdfd, s, n) == -1)
1054 die("write error on tty: %s\n", SERRNO);
1055 }
1056
1057 void
1058 ttyresize(void) {
1059 struct winsize w;
1060
1061 w.ws_row = term.row;
1062 w.ws_col = term.col;
1063 w.ws_xpixel = xw.tw;
1064 w.ws_ypixel = xw.th;
1065 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1066 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
1067 }
1068
1069 void
1070 tsetdirt(int top, int bot) {
1071 int i;
1072
1073 LIMIT(top, 0, term.row-1);
1074 LIMIT(bot, 0, term.row-1);
1075
1076 for(i = top; i <= bot; i++)
1077 term.dirty[i] = 1;
1078 }
1079
1080 void
1081 tfulldirt(void) {
1082 tsetdirt(0, term.row-1);
1083 }
1084
1085 void
1086 tcursor(int mode) {
1087 static TCursor c;
1088
1089 if(mode == CURSOR_SAVE) {
1090 c = term.c;
1091 } else if(mode == CURSOR_LOAD) {
1092 term.c = c;
1093 tmoveto(c.x, c.y);
1094 }
1095 }
1096
1097 void
1098 treset(void) {
1099 uint i;
1100
1101 term.c = (TCursor){{
1102 .mode = ATTR_NULL,
1103 .fg = defaultfg,
1104 .bg = defaultbg
1105 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1106
1107 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1108 for(i = tabspaces; i < term.col; i += tabspaces)
1109 term.tabs[i] = 1;
1110 term.top = 0;
1111 term.bot = term.row - 1;
1112 term.mode = MODE_WRAP;
1113
1114 tclearregion(0, 0, term.col-1, term.row-1);
1115 tmoveto(0, 0);
1116 tcursor(CURSOR_SAVE);
1117 }
1118
1119 void
1120 tnew(int col, int row) {
1121 /* set screen size */
1122 term.row = row;
1123 term.col = col;
1124 term.line = xmalloc(term.row * sizeof(Line));
1125 term.alt = xmalloc(term.row * sizeof(Line));
1126 term.dirty = xmalloc(term.row * sizeof(*term.dirty));
1127 term.tabs = xmalloc(term.col * sizeof(*term.tabs));
1128
1129 for(row = 0; row < term.row; row++) {
1130 term.line[row] = xmalloc(term.col * sizeof(Glyph));
1131 term.alt [row] = xmalloc(term.col * sizeof(Glyph));
1132 term.dirty[row] = 0;
1133 }
1134
1135 term.numlock = 1;
1136 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1137 /* setup screen */
1138 treset();
1139 }
1140
1141 void
1142 tswapscreen(void) {
1143 Line *tmp = term.line;
1144
1145 term.line = term.alt;
1146 term.alt = tmp;
1147 term.mode ^= MODE_ALTSCREEN;
1148 tfulldirt();
1149 }
1150
1151 void
1152 tscrolldown(int orig, int n) {
1153 int i;
1154 Line temp;
1155
1156 LIMIT(n, 0, term.bot-orig+1);
1157
1158 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1159
1160 for(i = term.bot; i >= orig+n; i--) {
1161 temp = term.line[i];
1162 term.line[i] = term.line[i-n];
1163 term.line[i-n] = temp;
1164
1165 term.dirty[i] = 1;
1166 term.dirty[i-n] = 1;
1167 }
1168
1169 selscroll(orig, n);
1170 }
1171
1172 void
1173 tscrollup(int orig, int n) {
1174 int i;
1175 Line temp;
1176 LIMIT(n, 0, term.bot-orig+1);
1177
1178 tclearregion(0, orig, term.col-1, orig+n-1);
1179
1180 for(i = orig; i <= term.bot-n; i++) {
1181 temp = term.line[i];
1182 term.line[i] = term.line[i+n];
1183 term.line[i+n] = temp;
1184
1185 term.dirty[i] = 1;
1186 term.dirty[i+n] = 1;
1187 }
1188
1189 selscroll(orig, -n);
1190 }
1191
1192 void
1193 selscroll(int orig, int n) {
1194 if(sel.bx == -1)
1195 return;
1196
1197 if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
1198 if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
1199 sel.bx = -1;
1200 return;
1201 }
1202 if(sel.by < term.top) {
1203 sel.by = term.top;
1204 sel.bx = 0;
1205 }
1206 if(sel.ey > term.bot) {
1207 sel.ey = term.bot;
1208 sel.ex = term.col;
1209 }
1210 sel.b.y = sel.by, sel.b.x = sel.bx;
1211 sel.e.y = sel.ey, sel.e.x = sel.ex;
1212 }
1213 }
1214
1215 void
1216 tnewline(int first_col) {
1217 int y = term.c.y;
1218
1219 if(y == term.bot) {
1220 tscrollup(term.top, 1);
1221 } else {
1222 y++;
1223 }
1224 tmoveto(first_col ? 0 : term.c.x, y);
1225 }
1226
1227 void
1228 csiparse(void) {
1229 /* int noarg = 1; */
1230 char *p = csiescseq.buf;
1231
1232 csiescseq.narg = 0;
1233 if(*p == '?')
1234 csiescseq.priv = 1, p++;
1235
1236 while(p < csiescseq.buf+csiescseq.len) {
1237 while(isdigit(*p)) {
1238 csiescseq.arg[csiescseq.narg] *= 10;
1239 csiescseq.arg[csiescseq.narg] += *p++ - '0'/*, noarg = 0 */;
1240 }
1241 if(*p == ';' && csiescseq.narg+1 < ESC_ARG_SIZ) {
1242 csiescseq.narg++, p++;
1243 } else {
1244 csiescseq.mode = *p;
1245 csiescseq.narg++;
1246
1247 return;
1248 }
1249 }
1250 }
1251
1252 /* for absolute user moves, when decom is set */
1253 void
1254 tmoveato(int x, int y) {
1255 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1256 }
1257
1258 void
1259 tmoveto(int x, int y) {
1260 int miny, maxy;
1261
1262 if(term.c.state & CURSOR_ORIGIN) {
1263 miny = term.top;
1264 maxy = term.bot;
1265 } else {
1266 miny = 0;
1267 maxy = term.row - 1;
1268 }
1269 LIMIT(x, 0, term.col-1);
1270 LIMIT(y, miny, maxy);
1271 term.c.state &= ~CURSOR_WRAPNEXT;
1272 term.c.x = x;
1273 term.c.y = y;
1274 }
1275
1276 void
1277 tsetchar(char *c, Glyph *attr, int x, int y) {
1278 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1279 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1280 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1281 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1282 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1283 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1284 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1285 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1286 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1287 };
1288
1289 /*
1290 * The table is proudly stolen from rxvt.
1291 */
1292 if(attr->mode & ATTR_GFX) {
1293 if(c[0] >= 0x41 && c[0] <= 0x7e
1294 && vt100_0[c[0] - 0x41]) {
1295 c = vt100_0[c[0] - 0x41];
1296 }
1297 }
1298
1299 term.dirty[y] = 1;
1300 term.line[y][x] = *attr;
1301 memcpy(term.line[y][x].c, c, UTF_SIZ);
1302 term.line[y][x].state |= GLYPH_SET;
1303 }
1304
1305 void
1306 tclearregion(int x1, int y1, int x2, int y2) {
1307 int x, y, temp;
1308
1309 if(x1 > x2)
1310 temp = x1, x1 = x2, x2 = temp;
1311 if(y1 > y2)
1312 temp = y1, y1 = y2, y2 = temp;
1313
1314 LIMIT(x1, 0, term.col-1);
1315 LIMIT(x2, 0, term.col-1);
1316 LIMIT(y1, 0, term.row-1);
1317 LIMIT(y2, 0, term.row-1);
1318
1319 for(y = y1; y <= y2; y++) {
1320 term.dirty[y] = 1;
1321 for(x = x1; x <= x2; x++)
1322 term.line[y][x].state = 0;
1323 }
1324 }
1325
1326 void
1327 tdeletechar(int n) {
1328 int src = term.c.x + n;
1329 int dst = term.c.x;
1330 int size = term.col - src;
1331
1332 term.dirty[term.c.y] = 1;
1333
1334 if(src >= term.col) {
1335 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1336 return;
1337 }
1338
1339 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1340 size * sizeof(Glyph));
1341 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1342 }
1343
1344 void
1345 tinsertblank(int n) {
1346 int src = term.c.x;
1347 int dst = src + n;
1348 int size = term.col - dst;
1349
1350 term.dirty[term.c.y] = 1;
1351
1352 if(dst >= term.col) {
1353 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1354 return;
1355 }
1356
1357 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1358 size * sizeof(Glyph));
1359 tclearregion(src, term.c.y, dst - 1, term.c.y);
1360 }
1361
1362 void
1363 tinsertblankline(int n) {
1364 if(term.c.y < term.top || term.c.y > term.bot)
1365 return;
1366
1367 tscrolldown(term.c.y, n);
1368 }
1369
1370 void
1371 tdeleteline(int n) {
1372 if(term.c.y < term.top || term.c.y > term.bot)
1373 return;
1374
1375 tscrollup(term.c.y, n);
1376 }
1377
1378 void
1379 tsetattr(int *attr, int l) {
1380 int i;
1381
1382 for(i = 0; i < l; i++) {
1383 switch(attr[i]) {
1384 case 0:
1385 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD \
1386 | ATTR_ITALIC | ATTR_BLINK);
1387 term.c.attr.fg = defaultfg;
1388 term.c.attr.bg = defaultbg;
1389 break;
1390 case 1:
1391 term.c.attr.mode |= ATTR_BOLD;
1392 break;
1393 case 3: /* enter standout (highlight) */
1394 term.c.attr.mode |= ATTR_ITALIC;
1395 break;
1396 case 4:
1397 term.c.attr.mode |= ATTR_UNDERLINE;
1398 break;
1399 case 5:
1400 term.c.attr.mode |= ATTR_BLINK;
1401 break;
1402 case 7:
1403 term.c.attr.mode |= ATTR_REVERSE;
1404 break;
1405 case 21:
1406 case 22:
1407 term.c.attr.mode &= ~ATTR_BOLD;
1408 break;
1409 case 23: /* leave standout (highlight) mode */
1410 term.c.attr.mode &= ~ATTR_ITALIC;
1411 break;
1412 case 24:
1413 term.c.attr.mode &= ~ATTR_UNDERLINE;
1414 break;
1415 case 25:
1416 term.c.attr.mode &= ~ATTR_BLINK;
1417 break;
1418 case 27:
1419 term.c.attr.mode &= ~ATTR_REVERSE;
1420 break;
1421 case 38:
1422 if(i + 2 < l && attr[i + 1] == 5) {
1423 i += 2;
1424 if(BETWEEN(attr[i], 0, 255)) {
1425 term.c.attr.fg = attr[i];
1426 } else {
1427 fprintf(stderr,
1428 "erresc: bad fgcolor %d\n",
1429 attr[i]);
1430 }
1431 } else {
1432 fprintf(stderr,
1433 "erresc(38): gfx attr %d unknown\n",
1434 attr[i]);
1435 }
1436 break;
1437 case 39:
1438 term.c.attr.fg = defaultfg;
1439 break;
1440 case 48:
1441 if(i + 2 < l && attr[i + 1] == 5) {
1442 i += 2;
1443 if(BETWEEN(attr[i], 0, 255)) {
1444 term.c.attr.bg = attr[i];
1445 } else {
1446 fprintf(stderr,
1447 "erresc: bad bgcolor %d\n",
1448 attr[i]);
1449 }
1450 } else {
1451 fprintf(stderr,
1452 "erresc(48): gfx attr %d unknown\n",
1453 attr[i]);
1454 }
1455 break;
1456 case 49:
1457 term.c.attr.bg = defaultbg;
1458 break;
1459 default:
1460 if(BETWEEN(attr[i], 30, 37)) {
1461 term.c.attr.fg = attr[i] - 30;
1462 } else if(BETWEEN(attr[i], 40, 47)) {
1463 term.c.attr.bg = attr[i] - 40;
1464 } else if(BETWEEN(attr[i], 90, 97)) {
1465 term.c.attr.fg = attr[i] - 90 + 8;
1466 } else if(BETWEEN(attr[i], 100, 107)) {
1467 term.c.attr.bg = attr[i] - 100 + 8;
1468 } else {
1469 fprintf(stderr,
1470 "erresc(default): gfx attr %d unknown\n",
1471 attr[i]), csidump();
1472 }
1473 break;
1474 }
1475 }
1476 }
1477
1478 void
1479 tsetscroll(int t, int b) {
1480 int temp;
1481
1482 LIMIT(t, 0, term.row-1);
1483 LIMIT(b, 0, term.row-1);
1484 if(t > b) {
1485 temp = t;
1486 t = b;
1487 b = temp;
1488 }
1489 term.top = t;
1490 term.bot = b;
1491 }
1492
1493 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1494
1495 void
1496 tsetmode(bool priv, bool set, int *args, int narg) {
1497 int *lim, mode;
1498 bool alt;
1499
1500 for(lim = args + narg; args < lim; ++args) {
1501 if(priv) {
1502 switch(*args) {
1503 break;
1504 case 1: /* DECCKM -- Cursor key */
1505 MODBIT(term.mode, set, MODE_APPCURSOR);
1506 break;
1507 case 5: /* DECSCNM -- Reverse video */
1508 mode = term.mode;
1509 MODBIT(term.mode, set, MODE_REVERSE);
1510 if(mode != term.mode)
1511 redraw();
1512 break;
1513 case 6: /* DECOM -- Origin */
1514 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1515 tmoveato(0, 0);
1516 break;
1517 case 7: /* DECAWM -- Auto wrap */
1518 MODBIT(term.mode, set, MODE_WRAP);
1519 break;
1520 case 0: /* Error (IGNORED) */
1521 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1522 case 3: /* DECCOLM -- Column (IGNORED) */
1523 case 4: /* DECSCLM -- Scroll (IGNORED) */
1524 case 8: /* DECARM -- Auto repeat (IGNORED) */
1525 case 18: /* DECPFF -- Printer feed (IGNORED) */
1526 case 19: /* DECPEX -- Printer extent (IGNORED) */
1527 case 42: /* DECNRCM -- National characters (IGNORED) */
1528 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1529 break;
1530 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1531 MODBIT(term.mode, !set, MODE_HIDE);
1532 break;
1533 case 1000: /* 1000,1002: enable xterm mouse report */
1534 MODBIT(term.mode, set, MODE_MOUSEBTN);
1535 break;
1536 case 1002:
1537 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1538 break;
1539 case 1049: /* = 1047 and 1048 */
1540 case 47:
1541 case 1047: {
1542 alt = IS_SET(MODE_ALTSCREEN);
1543 if(alt)
1544 tclearregion(0, 0, term.col-1, term.row-1);
1545 if(set ^ alt) /* set is always 1 or 0 */
1546 tswapscreen();
1547 if(*args != 1049)
1548 break;
1549 }
1550 /* pass through */
1551 case 1048:
1552 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1553 break;
1554 default:
1555 fprintf(stderr,
1556 "erresc: unknown private set/reset mode %d\n",
1557 *args);
1558 break;
1559 }
1560 } else {
1561 switch(*args) {
1562 case 0: /* Error (IGNORED) */
1563 break;
1564 case 2: /* KAM -- keyboard action */
1565 MODBIT(term.mode, set, MODE_KBDLOCK);
1566 break;
1567 case 4: /* IRM -- Insertion-replacement */
1568 MODBIT(term.mode, set, MODE_INSERT);
1569 break;
1570 case 12: /* SRM -- Send/Receive */
1571 MODBIT(term.mode, !set, MODE_ECHO);
1572 break;
1573 case 20: /* LNM -- Linefeed/new line */
1574 MODBIT(term.mode, set, MODE_CRLF);
1575 break;
1576 default:
1577 fprintf(stderr,
1578 "erresc: unknown set/reset mode %d\n",
1579 *args);
1580 break;
1581 }
1582 }
1583 }
1584 }
1585 #undef MODBIT
1586
1587
1588 void
1589 csihandle(void) {
1590 switch(csiescseq.mode) {
1591 default:
1592 unknown:
1593 fprintf(stderr, "erresc: unknown csi ");
1594 csidump();
1595 /* die(""); */
1596 break;
1597 case '@': /* ICH -- Insert <n> blank char */
1598 DEFAULT(csiescseq.arg[0], 1);
1599 tinsertblank(csiescseq.arg[0]);
1600 break;
1601 case 'A': /* CUU -- Cursor <n> Up */
1602 DEFAULT(csiescseq.arg[0], 1);
1603 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1604 break;
1605 case 'B': /* CUD -- Cursor <n> Down */
1606 case 'e': /* VPR --Cursor <n> Down */
1607 DEFAULT(csiescseq.arg[0], 1);
1608 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1609 break;
1610 case 'c': /* DA -- Device Attributes */
1611 if(csiescseq.arg[0] == 0)
1612 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1613 break;
1614 case 'C': /* CUF -- Cursor <n> Forward */
1615 case 'a': /* HPR -- Cursor <n> Forward */
1616 DEFAULT(csiescseq.arg[0], 1);
1617 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1618 break;
1619 case 'D': /* CUB -- Cursor <n> Backward */
1620 DEFAULT(csiescseq.arg[0], 1);
1621 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1622 break;
1623 case 'E': /* CNL -- Cursor <n> Down and first col */
1624 DEFAULT(csiescseq.arg[0], 1);
1625 tmoveto(0, term.c.y+csiescseq.arg[0]);
1626 break;
1627 case 'F': /* CPL -- Cursor <n> Up and first col */
1628 DEFAULT(csiescseq.arg[0], 1);
1629 tmoveto(0, term.c.y-csiescseq.arg[0]);
1630 break;
1631 case 'g': /* TBC -- Tabulation clear */
1632 switch (csiescseq.arg[0]) {
1633 case 0: /* clear current tab stop */
1634 term.tabs[term.c.x] = 0;
1635 break;
1636 case 3: /* clear all the tabs */
1637 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1638 break;
1639 default:
1640 goto unknown;
1641 }
1642 break;
1643 case 'G': /* CHA -- Move to <col> */
1644 case '`': /* HPA */
1645 DEFAULT(csiescseq.arg[0], 1);
1646 tmoveto(csiescseq.arg[0]-1, term.c.y);
1647 break;
1648 case 'H': /* CUP -- Move to <row> <col> */
1649 case 'f': /* HVP */
1650 DEFAULT(csiescseq.arg[0], 1);
1651 DEFAULT(csiescseq.arg[1], 1);
1652 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1653 break;
1654 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1655 DEFAULT(csiescseq.arg[0], 1);
1656 while(csiescseq.arg[0]--)
1657 tputtab(1);
1658 break;
1659 case 'J': /* ED -- Clear screen */
1660 sel.bx = -1;
1661 switch(csiescseq.arg[0]) {
1662 case 0: /* below */
1663 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1664 if(term.c.y < term.row-1)
1665 tclearregion(0, term.c.y+1, term.col-1, term.row-1);
1666 break;
1667 case 1: /* above */
1668 if(term.c.y > 1)
1669 tclearregion(0, 0, term.col-1, term.c.y-1);
1670 tclearregion(0, term.c.y, term.c.x, term.c.y);
1671 break;
1672 case 2: /* all */
1673 tclearregion(0, 0, term.col-1, term.row-1);
1674 break;
1675 default:
1676 goto unknown;
1677 }
1678 break;
1679 case 'K': /* EL -- Clear line */
1680 switch(csiescseq.arg[0]) {
1681 case 0: /* right */
1682 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1683 break;
1684 case 1: /* left */
1685 tclearregion(0, term.c.y, term.c.x, term.c.y);
1686 break;
1687 case 2: /* all */
1688 tclearregion(0, term.c.y, term.col-1, term.c.y);
1689 break;
1690 }
1691 break;
1692 case 'S': /* SU -- Scroll <n> line up */
1693 DEFAULT(csiescseq.arg[0], 1);
1694 tscrollup(term.top, csiescseq.arg[0]);
1695 break;
1696 case 'T': /* SD -- Scroll <n> line down */
1697 DEFAULT(csiescseq.arg[0], 1);
1698 tscrolldown(term.top, csiescseq.arg[0]);
1699 break;
1700 case 'L': /* IL -- Insert <n> blank lines */
1701 DEFAULT(csiescseq.arg[0], 1);
1702 tinsertblankline(csiescseq.arg[0]);
1703 break;
1704 case 'l': /* RM -- Reset Mode */
1705 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
1706 break;
1707 case 'M': /* DL -- Delete <n> lines */
1708 DEFAULT(csiescseq.arg[0], 1);
1709 tdeleteline(csiescseq.arg[0]);
1710 break;
1711 case 'X': /* ECH -- Erase <n> char */
1712 DEFAULT(csiescseq.arg[0], 1);
1713 tclearregion(term.c.x, term.c.y, term.c.x + csiescseq.arg[0], term.c.y);
1714 break;
1715 case 'P': /* DCH -- Delete <n> char */
1716 DEFAULT(csiescseq.arg[0], 1);
1717 tdeletechar(csiescseq.arg[0]);
1718 break;
1719 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
1720 DEFAULT(csiescseq.arg[0], 1);
1721 while(csiescseq.arg[0]--)
1722 tputtab(0);
1723 break;
1724 case 'd': /* VPA -- Move to <row> */
1725 DEFAULT(csiescseq.arg[0], 1);
1726 tmoveato(term.c.x, csiescseq.arg[0]-1);
1727 break;
1728 case 'h': /* SM -- Set terminal mode */
1729 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
1730 break;
1731 case 'm': /* SGR -- Terminal attribute (color) */
1732 tsetattr(csiescseq.arg, csiescseq.narg);
1733 break;
1734 case 'r': /* DECSTBM -- Set Scrolling Region */
1735 if(csiescseq.priv) {
1736 goto unknown;
1737 } else {
1738 DEFAULT(csiescseq.arg[0], 1);
1739 DEFAULT(csiescseq.arg[1], term.row);
1740 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
1741 tmoveato(0, 0);
1742 }
1743 break;
1744 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1745 tcursor(CURSOR_SAVE);
1746 break;
1747 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1748 tcursor(CURSOR_LOAD);
1749 break;
1750 }
1751 }
1752
1753 void
1754 csidump(void) {
1755 int i;
1756 uint c;
1757
1758 printf("ESC[");
1759 for(i = 0; i < csiescseq.len; i++) {
1760 c = csiescseq.buf[i] & 0xff;
1761 if(isprint(c)) {
1762 putchar(c);
1763 } else if(c == '\n') {
1764 printf("(\\n)");
1765 } else if(c == '\r') {
1766 printf("(\\r)");
1767 } else if(c == 0x1b) {
1768 printf("(\\e)");
1769 } else {
1770 printf("(%02x)", c);
1771 }
1772 }
1773 putchar('\n');
1774 }
1775
1776 void
1777 csireset(void) {
1778 memset(&csiescseq, 0, sizeof(csiescseq));
1779 }
1780
1781 void
1782 strhandle(void) {
1783 char *p;
1784
1785 /*
1786 * TODO: make this being useful in case of color palette change.
1787 */
1788 strparse();
1789
1790 p = strescseq.buf;
1791
1792 switch(strescseq.type) {
1793 case ']': /* OSC -- Operating System Command */
1794 switch(p[0]) {
1795 case '0':
1796 case '1':
1797 case '2':
1798 /*
1799 * TODO: Handle special chars in string, like umlauts.
1800 */
1801 if(p[1] == ';') {
1802 XStoreName(xw.dpy, xw.win, strescseq.buf+2);
1803 }
1804 break;
1805 case ';':
1806 XStoreName(xw.dpy, xw.win, strescseq.buf+1);
1807 break;
1808 case '4': /* TODO: Set color (arg0) to "rgb:%hexr/$hexg/$hexb" (arg1) */
1809 break;
1810 default:
1811 fprintf(stderr, "erresc: unknown str ");
1812 strdump();
1813 break;
1814 }
1815 break;
1816 case 'k': /* old title set compatibility */
1817 XStoreName(xw.dpy, xw.win, strescseq.buf);
1818 break;
1819 case 'P': /* DSC -- Device Control String */
1820 case '_': /* APC -- Application Program Command */
1821 case '^': /* PM -- Privacy Message */
1822 default:
1823 fprintf(stderr, "erresc: unknown str ");
1824 strdump();
1825 /* die(""); */
1826 break;
1827 }
1828 }
1829
1830 void
1831 strparse(void) {
1832 /*
1833 * TODO: Implement parsing like for CSI when required.
1834 * Format: ESC type cmd ';' arg0 [';' argn] ESC \
1835 */
1836 return;
1837 }
1838
1839 void
1840 strdump(void) {
1841 int i;
1842 uint c;
1843
1844 printf("ESC%c", strescseq.type);
1845 for(i = 0; i < strescseq.len; i++) {
1846 c = strescseq.buf[i] & 0xff;
1847 if(isprint(c)) {
1848 putchar(c);
1849 } else if(c == '\n') {
1850 printf("(\\n)");
1851 } else if(c == '\r') {
1852 printf("(\\r)");
1853 } else if(c == 0x1b) {
1854 printf("(\\e)");
1855 } else {
1856 printf("(%02x)", c);
1857 }
1858 }
1859 printf("ESC\\\n");
1860 }
1861
1862 void
1863 strreset(void) {
1864 memset(&strescseq, 0, sizeof(strescseq));
1865 }
1866
1867 void
1868 tputtab(bool forward) {
1869 uint x = term.c.x;
1870
1871 if(forward) {
1872 if(x == term.col)
1873 return;
1874 for(++x; x < term.col && !term.tabs[x]; ++x)
1875 /* nothing */ ;
1876 } else {
1877 if(x == 0)
1878 return;
1879 for(--x; x > 0 && !term.tabs[x]; --x)
1880 /* nothing */ ;
1881 }
1882 tmoveto(x, term.c.y);
1883 }
1884
1885 void
1886 techo(char *buf, int len) {
1887 for(; len > 0; buf++, len--) {
1888 char c = *buf;
1889
1890 if(c == '\033') { /* escape */
1891 tputc("^", 1);
1892 tputc("[", 1);
1893 } else if (c < '\x20') { /* control code */
1894 if(c != '\n' && c != '\r' && c != '\t') {
1895 c |= '\x40';
1896 tputc("^", 1);
1897 }
1898 tputc(&c, 1);
1899 } else {
1900 break;
1901 }
1902 }
1903 if (len)
1904 tputc(buf, len);
1905 }
1906
1907 void
1908 tputc(char *c, int len) {
1909 uchar ascii = *c;
1910 bool control = ascii < '\x20' || ascii == 0177;
1911
1912 if(iofd != -1) {
1913 if (xwrite(iofd, c, len) < 0) {
1914 fprintf(stderr, "Error writting in %s:%s\n",
1915 opt_io, strerror(errno));
1916 close(iofd);
1917 iofd = -1;
1918 }
1919 }
1920 /*
1921 * STR sequences must be checked before anything else
1922 * because it can use some control codes as part of the sequence.
1923 */
1924 if(term.esc & ESC_STR) {
1925 switch(ascii) {
1926 case '\033':
1927 term.esc = ESC_START | ESC_STR_END;
1928 break;
1929 case '\a': /* backwards compatibility to xterm */
1930 term.esc = 0;
1931 strhandle();
1932 break;
1933 default:
1934 strescseq.buf[strescseq.len++] = ascii;
1935 if(strescseq.len+1 >= STR_BUF_SIZ) {
1936 term.esc = 0;
1937 strhandle();
1938 }
1939 }
1940 return;
1941 }
1942
1943 /*
1944 * Actions of control codes must be performed as soon they arrive
1945 * because they can be embedded inside a control sequence, and
1946 * they must not cause conflicts with sequences.
1947 */
1948 if(control) {
1949 switch(ascii) {
1950 case '\t': /* HT */
1951 tputtab(1);
1952 return;
1953 case '\b': /* BS */
1954 tmoveto(term.c.x-1, term.c.y);
1955 return;
1956 case '\r': /* CR */
1957 tmoveto(0, term.c.y);
1958 return;
1959 case '\f': /* LF */
1960 case '\v': /* VT */
1961 case '\n': /* LF */
1962 /* go to first col if the mode is set */
1963 tnewline(IS_SET(MODE_CRLF));
1964 return;
1965 case '\a': /* BEL */
1966 if(!(xw.state & WIN_FOCUSED))
1967 xseturgency(1);
1968 return;
1969 case '\033': /* ESC */
1970 csireset();
1971 term.esc = ESC_START;
1972 return;
1973 case '\016': /* SO */
1974 term.c.attr.mode |= ATTR_GFX;
1975 return;
1976 case '\017': /* SI */
1977 term.c.attr.mode &= ~ATTR_GFX;
1978 return;
1979 case '\032': /* SUB */
1980 case '\030': /* CAN */
1981 csireset();
1982 return;
1983 case '\005': /* ENQ (IGNORED) */
1984 case '\000': /* NUL (IGNORED) */
1985 case '\021': /* XON (IGNORED) */
1986 case '\023': /* XOFF (IGNORED) */
1987 case 0177: /* DEL (IGNORED) */
1988 return;
1989 }
1990 } else if(term.esc & ESC_START) {
1991 if(term.esc & ESC_CSI) {
1992 csiescseq.buf[csiescseq.len++] = ascii;
1993 if(BETWEEN(ascii, 0x40, 0x7E)
1994 || csiescseq.len >= ESC_BUF_SIZ) {
1995 term.esc = 0;
1996 csiparse(), csihandle();
1997 }
1998 } else if(term.esc & ESC_STR_END) {
1999 term.esc = 0;
2000 if(ascii == '\\')
2001 strhandle();
2002 } else if(term.esc & ESC_ALTCHARSET) {
2003 switch(ascii) {
2004 case '0': /* Line drawing set */
2005 term.c.attr.mode |= ATTR_GFX;
2006 break;
2007 case 'B': /* USASCII */
2008 term.c.attr.mode &= ~ATTR_GFX;
2009 break;
2010 case 'A': /* UK (IGNORED) */
2011 case '<': /* multinational charset (IGNORED) */
2012 case '5': /* Finnish (IGNORED) */
2013 case 'C': /* Finnish (IGNORED) */
2014 case 'K': /* German (IGNORED) */
2015 break;
2016 default:
2017 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2018 }
2019 term.esc = 0;
2020 } else if(term.esc & ESC_TEST) {
2021 if(ascii == '8') { /* DEC screen alignment test. */
2022 char E[UTF_SIZ] = "E";
2023 int x, y;
2024
2025 for(x = 0; x < term.col; ++x) {
2026 for(y = 0; y < term.row; ++y)
2027 tsetchar(E, &term.c.attr, x, y);
2028 }
2029 }
2030 term.esc = 0;
2031 } else {
2032 switch(ascii) {
2033 case '[':
2034 term.esc |= ESC_CSI;
2035 break;
2036 case '#':
2037 term.esc |= ESC_TEST;
2038 break;
2039 case 'P': /* DCS -- Device Control String */
2040 case '_': /* APC -- Application Program Command */
2041 case '^': /* PM -- Privacy Message */
2042 case ']': /* OSC -- Operating System Command */
2043 case 'k': /* old title set compatibility */
2044 strreset();
2045 strescseq.type = ascii;
2046 term.esc |= ESC_STR;
2047 break;
2048 case '(': /* set primary charset G0 */
2049 term.esc |= ESC_ALTCHARSET;
2050 break;
2051 case ')': /* set secondary charset G1 (IGNORED) */
2052 case '*': /* set tertiary charset G2 (IGNORED) */
2053 case '+': /* set quaternary charset G3 (IGNORED) */
2054 term.esc = 0;
2055 break;
2056 case 'D': /* IND -- Linefeed */
2057 if(term.c.y == term.bot) {
2058 tscrollup(term.top, 1);
2059 } else {
2060 tmoveto(term.c.x, term.c.y+1);
2061 }
2062 term.esc = 0;
2063 break;
2064 case 'E': /* NEL -- Next line */
2065 tnewline(1); /* always go to first col */
2066 term.esc = 0;
2067 break;
2068 case 'H': /* HTS -- Horizontal tab stop */
2069 term.tabs[term.c.x] = 1;
2070 term.esc = 0;
2071 break;
2072 case 'M': /* RI -- Reverse index */
2073 if(term.c.y == term.top) {
2074 tscrolldown(term.top, 1);
2075 } else {
2076 tmoveto(term.c.x, term.c.y-1);
2077 }
2078 term.esc = 0;
2079 break;
2080 case 'Z': /* DECID -- Identify Terminal */
2081 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2082 term.esc = 0;
2083 break;
2084 case 'c': /* RIS -- Reset to inital state */
2085 treset();
2086 term.esc = 0;
2087 xresettitle();
2088 break;
2089 case '=': /* DECPAM -- Application keypad */
2090 term.mode |= MODE_APPKEYPAD;
2091 term.esc = 0;
2092 break;
2093 case '>': /* DECPNM -- Normal keypad */
2094 term.mode &= ~MODE_APPKEYPAD;
2095 term.esc = 0;
2096 break;
2097 case '7': /* DECSC -- Save Cursor */
2098 tcursor(CURSOR_SAVE);
2099 term.esc = 0;
2100 break;
2101 case '8': /* DECRC -- Restore Cursor */
2102 tcursor(CURSOR_LOAD);
2103 term.esc = 0;
2104 break;
2105 case '\\': /* ST -- Stop */
2106 term.esc = 0;
2107 break;
2108 default:
2109 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2110 (uchar) ascii, isprint(ascii)? ascii:'.');
2111 term.esc = 0;
2112 }
2113 }
2114 /*
2115 * All characters which form part of a sequence are not
2116 * printed
2117 */
2118 return;
2119 }
2120 /*
2121 * Display control codes only if we are in graphic mode
2122 */
2123 if(control && !(term.c.attr.mode & ATTR_GFX))
2124 return;
2125 if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
2126 sel.bx = -1;
2127 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
2128 tnewline(1); /* always go to first col */
2129
2130 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col) {
2131 memmove(&term.line[term.c.y][term.c.x+1],
2132 &term.line[term.c.y][term.c.x],
2133 (term.col - term.c.x - 1) * sizeof(Glyph));
2134 }
2135
2136 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2137 if(term.c.x+1 < term.col) {
2138 tmoveto(term.c.x+1, term.c.y);
2139 } else {
2140 term.c.state |= CURSOR_WRAPNEXT;
2141 }
2142 }
2143
2144 int
2145 tresize(int col, int row) {
2146 int i, x;
2147 int minrow = MIN(row, term.row);
2148 int mincol = MIN(col, term.col);
2149 int slide = term.c.y - row + 1;
2150 bool *bp;
2151
2152 if(col < 1 || row < 1)
2153 return 0;
2154
2155 /* free unneeded rows */
2156 i = 0;
2157 if(slide > 0) {
2158 /* slide screen to keep cursor where we expect it -
2159 * tscrollup would work here, but we can optimize to
2160 * memmove because we're freeing the earlier lines */
2161 for(/* i = 0 */; i < slide; i++) {
2162 free(term.line[i]);
2163 free(term.alt[i]);
2164 }
2165 memmove(term.line, term.line + slide, row * sizeof(Line));
2166 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2167 }
2168 for(i += row; i < term.row; i++) {
2169 free(term.line[i]);
2170 free(term.alt[i]);
2171 }
2172
2173 /* resize to new height */
2174 term.line = xrealloc(term.line, row * sizeof(Line));
2175 term.alt = xrealloc(term.alt, row * sizeof(Line));
2176 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2177 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2178
2179 /* resize each row to new width, zero-pad if needed */
2180 for(i = 0; i < minrow; i++) {
2181 term.dirty[i] = 1;
2182 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2183 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2184 for(x = mincol; x < col; x++) {
2185 term.line[i][x].state = 0;
2186 term.alt[i][x].state = 0;
2187 }
2188 }
2189
2190 /* allocate any new rows */
2191 for(/* i == minrow */; i < row; i++) {
2192 term.dirty[i] = 1;
2193 term.line[i] = xcalloc(col, sizeof(Glyph));
2194 term.alt [i] = xcalloc(col, sizeof(Glyph));
2195 }
2196 if(col > term.col) {
2197 bp = term.tabs + term.col;
2198
2199 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2200 while(--bp > term.tabs && !*bp)
2201 /* nothing */ ;
2202 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2203 *bp = 1;
2204 }
2205 /* update terminal size */
2206 term.col = col;
2207 term.row = row;
2208 /* reset scrolling region */
2209 tsetscroll(0, row-1);
2210 /* make use of the LIMIT in tmoveto */
2211 tmoveto(term.c.x, term.c.y);
2212
2213 return (slide > 0);
2214 }
2215
2216 void
2217 xresize(int col, int row) {
2218 xw.tw = MAX(1, col * xw.cw);
2219 xw.th = MAX(1, row * xw.ch);
2220
2221 XftDrawChange(xw.draw, xw.buf);
2222 }
2223
2224 void
2225 xloadcols(void) {
2226 int i, r, g, b;
2227 XRenderColor color = { .alpha = 0 };
2228
2229 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
2230 for(i = 0; i < LEN(colorname); i++) {
2231 if(!colorname[i])
2232 continue;
2233 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2234 die("Could not allocate color '%s'\n", colorname[i]);
2235 }
2236 }
2237
2238 /* load colors [16-255] ; same colors as xterm */
2239 for(i = 16, r = 0; r < 6; r++) {
2240 for(g = 0; g < 6; g++) {
2241 for(b = 0; b < 6; b++) {
2242 color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
2243 color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
2244 color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
2245 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i])) {
2246 die("Could not allocate color %d\n", i);
2247 }
2248 i++;
2249 }
2250 }
2251 }
2252
2253 for(r = 0; r < 24; r++, i++) {
2254 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
2255 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color,
2256 &dc.col[i])) {
2257 die("Could not allocate color %d\n", i);
2258 }
2259 }
2260 }
2261
2262 void
2263 xtermclear(int col1, int row1, int col2, int row2) {
2264 XftDrawRect(xw.draw,
2265 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2266 borderpx + col1 * xw.cw,
2267 borderpx + row1 * xw.ch,
2268 (col2-col1+1) * xw.cw,
2269 (row2-row1+1) * xw.ch);
2270 }
2271
2272 /*
2273 * Absolute coordinates.
2274 */
2275 void
2276 xclear(int x1, int y1, int x2, int y2) {
2277 XftDrawRect(xw.draw,
2278 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2279 x1, y1, x2-x1, y2-y1);
2280 }
2281
2282 void
2283 xhints(void) {
2284 XClassHint class = {opt_class ? opt_class : termname, termname};
2285 XWMHints wm = {.flags = InputHint, .input = 1};
2286 XSizeHints *sizeh = NULL;
2287
2288 sizeh = XAllocSizeHints();
2289 if(xw.isfixed == False) {
2290 sizeh->flags = PSize | PResizeInc | PBaseSize;
2291 sizeh->height = xw.h;
2292 sizeh->width = xw.w;
2293 sizeh->height_inc = xw.ch;
2294 sizeh->width_inc = xw.cw;
2295 sizeh->base_height = 2 * borderpx;
2296 sizeh->base_width = 2 * borderpx;
2297 } else {
2298 sizeh->flags = PMaxSize | PMinSize;
2299 sizeh->min_width = sizeh->max_width = xw.fw;
2300 sizeh->min_height = sizeh->max_height = xw.fh;
2301 }
2302
2303 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
2304 XFree(sizeh);
2305 }
2306
2307 int
2308 xloadfont(Font *f, FcPattern *pattern) {
2309 FcPattern *match;
2310 FcResult result;
2311
2312 match = FcFontMatch(NULL, pattern, &result);
2313 if(!match)
2314 return 1;
2315
2316 if(!(f->set = FcFontSort(0, match, FcTrue, 0, &result))) {
2317 FcPatternDestroy(match);
2318 return 1;
2319 }
2320
2321 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2322 FcPatternDestroy(match);
2323 return 1;
2324 }
2325
2326 f->pattern = FcPatternDuplicate(pattern);
2327
2328 f->ascent = f->match->ascent;
2329 f->descent = f->match->descent;
2330 f->lbearing = 0;
2331 f->rbearing = f->match->max_advance_width;
2332
2333 f->height = f->match->height;
2334 f->width = f->lbearing + f->rbearing;
2335
2336 return 0;
2337 }
2338
2339 void
2340 xloadfonts(char *fontstr, int fontsize) {
2341 FcPattern *pattern;
2342 FcResult result;
2343 double fontval;
2344
2345 if(fontstr[0] == '-') {
2346 pattern = XftXlfdParse(fontstr, False, False);
2347 } else {
2348 pattern = FcNameParse((FcChar8 *)fontstr);
2349 }
2350
2351 if(!pattern)
2352 die("st: can't open font %s\n", fontstr);
2353
2354 if(fontsize > 0) {
2355 FcPatternDel(pattern, FC_PIXEL_SIZE);
2356 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2357 usedfontsize = fontsize;
2358 } else {
2359 result = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2360 if(result == FcResultMatch) {
2361 usedfontsize = (int)fontval;
2362 } else {
2363 /*
2364 * Default font size is 12, if none given. This is to
2365 * have a known usedfontsize value.
2366 */
2367 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
2368 usedfontsize = 12;
2369 }
2370 }
2371
2372 FcConfigSubstitute(0, pattern, FcMatchPattern);
2373 FcDefaultSubstitute(pattern);
2374
2375 if(xloadfont(&dc.font, pattern))
2376 die("st: can't open font %s\n", fontstr);
2377
2378 /* Setting character width and height. */
2379 xw.cw = dc.font.width;
2380 xw.ch = dc.font.height;
2381
2382 FcPatternDel(pattern, FC_WEIGHT);
2383 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
2384 if(xloadfont(&dc.bfont, pattern))
2385 die("st: can't open font %s\n", fontstr);
2386
2387 FcPatternDel(pattern, FC_SLANT);
2388 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
2389 if(xloadfont(&dc.ibfont, pattern))
2390 die("st: can't open font %s\n", fontstr);
2391
2392 FcPatternDel(pattern, FC_WEIGHT);
2393 if(xloadfont(&dc.ifont, pattern))
2394 die("st: can't open font %s\n", fontstr);
2395
2396 FcPatternDestroy(pattern);
2397 }
2398
2399 void
2400 xunloadfonts(void)
2401 {
2402 int i, ip;
2403
2404 /*
2405 * Free the loaded fonts in the font cache. This is done backwards
2406 * from the frccur.
2407 */
2408 for (i = 0, ip = frccur; i < frclen; i++, ip--) {
2409 if (ip < 0)
2410 ip = LEN(frc) - 1;
2411 XftFontClose(xw.dpy, frc[ip].font);
2412 }
2413 frccur = -1;
2414 frclen = 0;
2415
2416 XftFontClose(xw.dpy, dc.font.match);
2417 FcPatternDestroy(dc.font.pattern);
2418 FcFontSetDestroy(dc.font.set);
2419 XftFontClose(xw.dpy, dc.bfont.match);
2420 FcPatternDestroy(dc.bfont.pattern);
2421 FcFontSetDestroy(dc.bfont.set);
2422 XftFontClose(xw.dpy, dc.ifont.match);
2423 FcPatternDestroy(dc.ifont.pattern);
2424 FcFontSetDestroy(dc.ifont.set);
2425 XftFontClose(xw.dpy, dc.ibfont.match);
2426 FcPatternDestroy(dc.ibfont.pattern);
2427 FcFontSetDestroy(dc.ibfont.set);
2428 }
2429
2430 void
2431 xzoom(const Arg *arg)
2432 {
2433 xunloadfonts();
2434 xloadfonts(usedfont, usedfontsize + arg->i);
2435 cresize(0, 0);
2436 draw();
2437 }
2438
2439 void
2440 xinit(void) {
2441 XSetWindowAttributes attrs;
2442 Cursor cursor;
2443 Window parent;
2444 int sw, sh, major, minor;
2445
2446 if(!(xw.dpy = XOpenDisplay(NULL)))
2447 die("Can't open display\n");
2448 xw.scr = XDefaultScreen(xw.dpy);
2449 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
2450
2451 /* font */
2452 if (!FcInit())
2453 die("Could not init fontconfig.\n");
2454
2455 usedfont = (opt_font == NULL)? font : opt_font;
2456 xloadfonts(usedfont, 0);
2457
2458 /* colors */
2459 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
2460 xloadcols();
2461
2462 /* adjust fixed window geometry */
2463 if(xw.isfixed) {
2464 sw = DisplayWidth(xw.dpy, xw.scr);
2465 sh = DisplayHeight(xw.dpy, xw.scr);
2466 if(xw.fx < 0)
2467 xw.fx = sw + xw.fx - xw.fw - 1;
2468 if(xw.fy < 0)
2469 xw.fy = sh + xw.fy - xw.fh - 1;
2470
2471 xw.h = xw.fh;
2472 xw.w = xw.fw;
2473 } else {
2474 /* window - default size */
2475 xw.h = 2 * borderpx + term.row * xw.ch;
2476 xw.w = 2 * borderpx + term.col * xw.cw;
2477 xw.fx = 0;
2478 xw.fy = 0;
2479 }
2480
2481 attrs.background_pixel = dc.col[defaultbg].pixel;
2482 attrs.border_pixel = dc.col[defaultbg].pixel;
2483 attrs.bit_gravity = NorthWestGravity;
2484 attrs.event_mask = FocusChangeMask | KeyPressMask
2485 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
2486 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
2487 attrs.colormap = xw.cmap;
2488
2489 parent = opt_embed ? strtol(opt_embed, NULL, 0) : XRootWindow(xw.dpy, xw.scr);
2490 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
2491 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
2492 xw.vis,
2493 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
2494 | CWColormap,
2495 &attrs);
2496
2497 /* double buffering */
2498 if(!XdbeQueryExtension(xw.dpy, &major, &minor))
2499 die("Xdbe extension is not present\n");
2500 xw.buf = XdbeAllocateBackBufferName(xw.dpy, xw.win, XdbeCopied);
2501
2502 /* Xft rendering context */
2503 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
2504
2505 /* input methods */
2506 xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL);
2507 if(xw.xim == NULL)
2508 die("XOpenIM failed. Could not open input device.\n");
2509 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
2510 | XIMStatusNothing, XNClientWindow, xw.win,
2511 XNFocusWindow, xw.win, NULL);
2512 if(xw.xic == NULL)
2513 die("XCreateIC failed. Could not obtain input method.\n");
2514
2515 /* white cursor, black outline */
2516 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
2517 XDefineCursor(xw.dpy, xw.win, cursor);
2518 XRecolorCursor(xw.dpy, cursor,
2519 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
2520 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
2521
2522 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
2523 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
2524 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
2525
2526 xresettitle();
2527 XMapWindow(xw.dpy, xw.win);
2528 xhints();
2529 XSync(xw.dpy, 0);
2530 }
2531
2532 void
2533 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
2534 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
2535 width = charlen * xw.cw, xp, i;
2536 int frp, frcflags;
2537 int u8fl, u8fblen, u8cblen, doesexist;
2538 char *u8c, *u8fs;
2539 long u8char;
2540 Font *font = &dc.font;
2541 FcResult fcres;
2542 FcPattern *fcpattern, *fontpattern;
2543 FcFontSet *fcsets[] = { NULL };
2544 FcCharSet *fccharset;
2545 Colour *fg = &dc.col[base.fg], *bg = &dc.col[base.bg],
2546 *temp, revfg, revbg;
2547 XRenderColor colfg, colbg;
2548
2549 frcflags = FRC_NORMAL;
2550
2551 if(base.mode & ATTR_BOLD) {
2552 if(BETWEEN(base.fg, 0, 7)) {
2553 /* basic system colors */
2554 fg = &dc.col[base.fg + 8];
2555 } else if(BETWEEN(base.fg, 16, 195)) {
2556 /* 256 colors */
2557 fg = &dc.col[base.fg + 36];
2558 } else if(BETWEEN(base.fg, 232, 251)) {
2559 /* greyscale */
2560 fg = &dc.col[base.fg + 4];
2561 }
2562 /*
2563 * Those ranges will not be brightened:
2564 * 8 - 15 – bright system colors
2565 * 196 - 231 – highest 256 color cube
2566 * 252 - 255 – brightest colors in greyscale
2567 */
2568 font = &dc.bfont;
2569 frcflags = FRC_BOLD;
2570 }
2571
2572 if(base.mode & ATTR_ITALIC) {
2573 font = &dc.ifont;
2574 frcflags = FRC_ITALIC;
2575 }
2576 if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
2577 font = &dc.ibfont;
2578 frcflags = FRC_ITALICBOLD;
2579 }
2580
2581 if(IS_SET(MODE_REVERSE)) {
2582 if(fg == &dc.col[defaultfg]) {
2583 fg = &dc.col[defaultbg];
2584 } else {
2585 colfg.red = ~fg->color.red;
2586 colfg.green = ~fg->color.green;
2587 colfg.blue = ~fg->color.blue;
2588 colfg.alpha = fg->color.alpha;
2589 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
2590 fg = &revfg;
2591 }
2592
2593 if(bg == &dc.col[defaultbg]) {
2594 bg = &dc.col[defaultfg];
2595 } else {
2596 colbg.red = ~bg->color.red;
2597 colbg.green = ~bg->color.green;
2598 colbg.blue = ~bg->color.blue;
2599 colbg.alpha = bg->color.alpha;
2600 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &revbg);
2601 bg = &revbg;
2602 }
2603 }
2604
2605 if(base.mode & ATTR_REVERSE) {
2606 temp = fg;
2607 fg = bg;
2608 bg = temp;
2609 }
2610
2611 /* Intelligent cleaning up of the borders. */
2612 if(x == 0) {
2613 xclear(0, (y == 0)? 0 : winy, borderpx,
2614 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
2615 }
2616 if(x + charlen >= term.col) {
2617 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
2618 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
2619 }
2620 if(y == 0)
2621 xclear(winx, 0, winx + width, borderpx);
2622 if(y == term.row-1)
2623 xclear(winx, winy + xw.ch, winx + width, xw.h);
2624
2625 /* Clean up the region we want to draw to. */
2626 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
2627
2628 fcsets[0] = font->set;
2629 for (xp = winx; bytelen > 0;) {
2630 /*
2631 * Search for the range in the to be printed string of glyphs
2632 * that are in the main font. Then print that range. If
2633 * some glyph is found that is not in the font, do the
2634 * fallback dance.
2635 */
2636 u8fs = s;
2637 u8fblen = 0;
2638 u8fl = 0;
2639 for (;;) {
2640 u8c = s;
2641 u8cblen = utf8decode(s, &u8char);
2642 s += u8cblen;
2643 bytelen -= u8cblen;
2644
2645 doesexist = XftCharIndex(xw.dpy, font->match, u8char);
2646 if (!doesexist || bytelen <= 0) {
2647 if (bytelen <= 0) {
2648 if (doesexist) {
2649 u8fl++;
2650 u8fblen += u8cblen;
2651 }
2652 }
2653
2654 if (u8fl > 0) {
2655 XftDrawStringUtf8(xw.draw, fg,
2656 font->match, xp,
2657 winy + font->ascent,
2658 (FcChar8 *)u8fs,
2659 u8fblen);
2660 xp += font->width * u8fl;
2661 }
2662 break;
2663 }
2664
2665 u8fl++;
2666 u8fblen += u8cblen;
2667 }
2668 if (doesexist)
2669 break;
2670
2671 frp = frccur;
2672 /* Search the font cache. */
2673 for (i = 0; i < frclen; i++, frp--) {
2674 if (frp <= 0)
2675 frp = LEN(frc) - 1;
2676
2677 if (frc[frp].c == u8char
2678 && frc[frp].flags == frcflags) {
2679 break;
2680 }
2681 }
2682
2683 /* Nothing was found. */
2684 if (i >= frclen) {
2685 /*
2686 * Nothing was found in the cache. Now use
2687 * some dozen of Fontconfig calls to get the
2688 * font for one single character.
2689 */
2690 fcpattern = FcPatternDuplicate(font->pattern);
2691 fccharset = FcCharSetCreate();
2692
2693 FcCharSetAddChar(fccharset, u8char);
2694 FcPatternAddCharSet(fcpattern, FC_CHARSET,
2695 fccharset);
2696 FcPatternAddBool(fcpattern, FC_SCALABLE,
2697 FcTrue);
2698
2699 FcConfigSubstitute(0, fcpattern,
2700 FcMatchPattern);
2701 FcDefaultSubstitute(fcpattern);
2702
2703 fontpattern = FcFontSetMatch(0, fcsets,
2704 FcTrue, fcpattern, &fcres);
2705
2706 /*
2707 * Overwrite or create the new cache entry
2708 * entry.
2709 */
2710 frccur++;
2711 frclen++;
2712 if (frccur >= LEN(frc))
2713 frccur = 0;
2714 if (frclen > LEN(frc)) {
2715 frclen = LEN(frc);
2716 XftFontClose(xw.dpy, frc[frccur].font);
2717 }
2718
2719 frc[frccur].font = XftFontOpenPattern(xw.dpy,
2720 fontpattern);
2721 frc[frccur].c = u8char;
2722 frc[frccur].flags = frcflags;
2723
2724 FcPatternDestroy(fcpattern);
2725 FcCharSetDestroy(fccharset);
2726
2727 frp = frccur;
2728 }
2729
2730 XftDrawStringUtf8(xw.draw, fg, frc[frp].font,
2731 xp, winy + frc[frp].font->ascent,
2732 (FcChar8 *)u8c, u8cblen);
2733
2734 xp += font->width;
2735 }
2736
2737 /*
2738 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
2739 winy + font->ascent, (FcChar8 *)s, bytelen);
2740 */
2741
2742 if(base.mode & ATTR_UNDERLINE) {
2743 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
2744 width, 1);
2745 }
2746 }
2747
2748 void
2749 xdrawcursor(void) {
2750 static int oldx = 0, oldy = 0;
2751 int sl;
2752 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs, 0};
2753
2754 LIMIT(oldx, 0, term.col-1);
2755 LIMIT(oldy, 0, term.row-1);
2756
2757 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
2758 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
2759
2760 /* remove the old cursor */
2761 if(term.line[oldy][oldx].state & GLYPH_SET) {
2762 sl = utf8size(term.line[oldy][oldx].c);
2763 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
2764 oldy, 1, sl);
2765 } else {
2766 xtermclear(oldx, oldy, oldx, oldy);
2767 }
2768
2769 /* draw the new one */
2770 if(!(IS_SET(MODE_HIDE))) {
2771 if(!(xw.state & WIN_FOCUSED))
2772 g.bg = defaultucs;
2773
2774 if(IS_SET(MODE_REVERSE))
2775 g.mode |= ATTR_REVERSE, g.fg = defaultcs, g.bg = defaultfg;
2776
2777 sl = utf8size(g.c);
2778 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
2779 oldx = term.c.x, oldy = term.c.y;
2780 }
2781 }
2782
2783 void
2784 xresettitle(void) {
2785 XStoreName(xw.dpy, xw.win, opt_title ? opt_title : "st");
2786 }
2787
2788 void
2789 redraw(void) {
2790 struct timespec tv = {0, REDRAW_TIMEOUT * 1000};
2791
2792 tfulldirt();
2793 draw();
2794 XSync(xw.dpy, False); /* necessary for a good tput flash */
2795 nanosleep(&tv, NULL);
2796 }
2797
2798 void
2799 draw(void) {
2800 XdbeSwapInfo swpinfo[1] = {{xw.win, XdbeCopied}};
2801
2802 drawregion(0, 0, term.col, term.row);
2803 XdbeSwapBuffers(xw.dpy, swpinfo, 1);
2804 }
2805
2806 void
2807 drawregion(int x1, int y1, int x2, int y2) {
2808 int ic, ib, x, y, ox, sl;
2809 Glyph base, new;
2810 char buf[DRAW_BUF_SIZ];
2811 bool ena_sel = sel.bx != -1;
2812
2813 if(sel.alt ^ IS_SET(MODE_ALTSCREEN))
2814 ena_sel = 0;
2815
2816 if(!(xw.state & WIN_VISIBLE))
2817 return;
2818
2819 for(y = y1; y < y2; y++) {
2820 if(!term.dirty[y])
2821 continue;
2822
2823 xtermclear(0, y, term.col, y);
2824 term.dirty[y] = 0;
2825 base = term.line[y][0];
2826 ic = ib = ox = 0;
2827 for(x = x1; x < x2; x++) {
2828 new = term.line[y][x];
2829 if(ena_sel && *(new.c) && selected(x, y))
2830 new.mode ^= ATTR_REVERSE;
2831 if(ib > 0 && (!(new.state & GLYPH_SET)
2832 || ATTRCMP(base, new)
2833 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
2834 xdraws(buf, base, ox, y, ic, ib);
2835 ic = ib = 0;
2836 }
2837 if(new.state & GLYPH_SET) {
2838 if(ib == 0) {
2839 ox = x;
2840 base = new;
2841 }
2842 sl = utf8size(new.c);
2843 memcpy(buf+ib, new.c, sl);
2844 ib += sl;
2845 ++ic;
2846 }
2847 }
2848 if(ib > 0)
2849 xdraws(buf, base, ox, y, ic, ib);
2850 }
2851 xdrawcursor();
2852 }
2853
2854 void
2855 expose(XEvent *ev) {
2856 XExposeEvent *e = &ev->xexpose;
2857
2858 if(xw.state & WIN_REDRAW) {
2859 if(!e->count)
2860 xw.state &= ~WIN_REDRAW;
2861 }
2862 }
2863
2864 void
2865 visibility(XEvent *ev) {
2866 XVisibilityEvent *e = &ev->xvisibility;
2867
2868 if(e->state == VisibilityFullyObscured) {
2869 xw.state &= ~WIN_VISIBLE;
2870 } else if(!(xw.state & WIN_VISIBLE)) {
2871 /* need a full redraw for next Expose, not just a buf copy */
2872 xw.state |= WIN_VISIBLE | WIN_REDRAW;
2873 }
2874 }
2875
2876 void
2877 unmap(XEvent *ev) {
2878 xw.state &= ~WIN_VISIBLE;
2879 }
2880
2881 void
2882 xseturgency(int add) {
2883 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
2884
2885 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
2886 XSetWMHints(xw.dpy, xw.win, h);
2887 XFree(h);
2888 }
2889
2890 void
2891 focus(XEvent *ev) {
2892 if(ev->type == FocusIn) {
2893 XSetICFocus(xw.xic);
2894 xw.state |= WIN_FOCUSED;
2895 xseturgency(0);
2896 } else {
2897 XUnsetICFocus(xw.xic);
2898 xw.state &= ~WIN_FOCUSED;
2899 }
2900 }
2901
2902 inline bool
2903 match(uint mask, uint state) {
2904 if(mask == XK_NO_MOD && state)
2905 return false;
2906 if(mask != XK_ANY_MOD && mask != XK_NO_MOD && !state)
2907 return false;
2908 if((state & mask) != state)
2909 return false;
2910 return true;
2911 }
2912
2913 void
2914 numlock(const Arg *dummy) {
2915 term.numlock ^= 1;
2916 }
2917
2918 char*
2919 kmap(KeySym k, uint state) {
2920 uint mask;
2921 Key *kp;
2922 int i;
2923
2924 /* Check for mapped keys out of X11 function keys. */
2925 for(i = 0; i < LEN(mappedkeys); i++) {
2926 if(mappedkeys[i] == k)
2927 break;
2928 }
2929 if(i == LEN(mappedkeys)) {
2930 if((k & 0xFFFF) < 0xFD00)
2931 return NULL;
2932 }
2933
2934 for(kp = key; kp < key + LEN(key); kp++) {
2935 mask = kp->mask;
2936
2937 if(kp->k != k)
2938 continue;
2939
2940 if(!match(mask, state))
2941 continue;
2942
2943 if(kp->appkey > 0) {
2944 if(!IS_SET(MODE_APPKEYPAD))
2945 continue;
2946 if(term.numlock && kp->appkey == 2)
2947 continue;
2948 } else if(kp->appkey < 0 && IS_SET(MODE_APPKEYPAD)) {
2949 continue;
2950 }
2951
2952 if((kp->appcursor < 0 && IS_SET(MODE_APPCURSOR)) ||
2953 (kp->appcursor > 0
2954 && !IS_SET(MODE_APPCURSOR))) {
2955 continue;
2956 }
2957
2958 if((kp->crlf < 0 && IS_SET(MODE_CRLF)) ||
2959 (kp->crlf > 0 && !IS_SET(MODE_CRLF))) {
2960 continue;
2961 }
2962
2963 return kp->s;
2964 }
2965
2966 return NULL;
2967 }
2968
2969 void
2970 kpress(XEvent *ev) {
2971 XKeyEvent *e = &ev->xkey;
2972 KeySym ksym;
2973 char xstr[31], buf[32], *customkey, *cp = buf;
2974 int len;
2975 Status status;
2976 Shortcut *bp;
2977
2978 if (IS_SET(MODE_KBDLOCK))
2979 return;
2980
2981 len = XmbLookupString(xw.xic, e, xstr, sizeof(xstr), &ksym, &status);
2982 e->state &= ~Mod2Mask;
2983 /* 1. shortcuts */
2984 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
2985 if(ksym == bp->keysym && match(bp->mod, e->state)) {
2986 bp->func(&(bp->arg));
2987 return;
2988 }
2989 }
2990
2991 /* 2. custom keys from config.h */
2992 if((customkey = kmap(ksym, e->state))) {
2993 len = strlen(customkey);
2994 memcpy(buf, customkey, len);
2995 /* 2. hardcoded (overrides X lookup) */
2996 } else {
2997 if(len == 0)
2998 return;
2999
3000 if (len == 1 && e->state & Mod1Mask)
3001 *cp++ = '\033';
3002
3003 memcpy(cp, xstr, len);
3004 len = cp - buf + len;
3005 }
3006
3007 ttywrite(buf, len);
3008 if(IS_SET(MODE_ECHO))
3009 techo(buf, len);
3010 }
3011
3012
3013 void
3014 cmessage(XEvent *e) {
3015 /* See xembed specs
3016 http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html */
3017 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3018 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3019 xw.state |= WIN_FOCUSED;
3020 xseturgency(0);
3021 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3022 xw.state &= ~WIN_FOCUSED;
3023 }
3024 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3025 /* Send SIGHUP to shell */
3026 kill(pid, SIGHUP);
3027 exit(EXIT_SUCCESS);
3028 }
3029 }
3030
3031 void
3032 cresize(int width, int height)
3033 {
3034 int col, row;
3035
3036 if(width != 0)
3037 xw.w = width;
3038 if(height != 0)
3039 xw.h = height;
3040
3041 col = (xw.w - 2 * borderpx) / xw.cw;
3042 row = (xw.h - 2 * borderpx) / xw.ch;
3043
3044 tresize(col, row);
3045 xresize(col, row);
3046 ttyresize();
3047 }
3048
3049 void
3050 resize(XEvent *e) {
3051 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3052 return;
3053
3054 cresize(e->xconfigure.width, e->xconfigure.height);
3055 }
3056
3057 void
3058 run(void) {
3059 XEvent ev;
3060 fd_set rfd;
3061 int xfd = XConnectionNumber(xw.dpy), i;
3062 struct timeval drawtimeout, *tv = NULL;
3063
3064 for(i = 0;; i++) {
3065 FD_ZERO(&rfd);
3066 FD_SET(cmdfd, &rfd);
3067 FD_SET(xfd, &rfd);
3068 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
3069 if(errno == EINTR)
3070 continue;
3071 die("select failed: %s\n", SERRNO);
3072 }
3073
3074 /*
3075 * Stop after a certain number of reads so the user does not
3076 * feel like the system is stuttering.
3077 */
3078 if(i < 1000 && FD_ISSET(cmdfd, &rfd)) {
3079 ttyread();
3080
3081 /*
3082 * Just wait a bit so it isn't disturbing the
3083 * user and the system is able to write something.
3084 */
3085 drawtimeout.tv_sec = 0;
3086 drawtimeout.tv_usec = 5;
3087 tv = &drawtimeout;
3088 continue;
3089 }
3090 i = 0;
3091 tv = NULL;
3092
3093 while(XPending(xw.dpy)) {
3094 XNextEvent(xw.dpy, &ev);
3095 if(XFilterEvent(&ev, None))
3096 continue;
3097 if(handler[ev.type])
3098 (handler[ev.type])(&ev);
3099 }
3100
3101 draw();
3102 XFlush(xw.dpy);
3103 }
3104 }
3105
3106 int
3107 main(int argc, char *argv[]) {
3108 int i, bitm, xr, yr;
3109 uint wr, hr;
3110
3111 xw.fw = xw.fh = xw.fx = xw.fy = 0;
3112 xw.isfixed = False;
3113
3114 for(i = 1; i < argc; i++) {
3115 switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
3116 case 'c':
3117 if(++i < argc)
3118 opt_class = argv[i];
3119 break;
3120 case 'e':
3121 /* eat all remaining arguments */
3122 if(++i < argc)
3123 opt_cmd = &argv[i];
3124 goto run;
3125 case 'f':
3126 if(++i < argc)
3127 opt_font = argv[i];
3128 break;
3129 case 'g':
3130 if(++i >= argc)
3131 break;
3132
3133 bitm = XParseGeometry(argv[i], &xr, &yr, &wr, &hr);
3134 if(bitm & XValue)
3135 xw.fx = xr;
3136 if(bitm & YValue)
3137 xw.fy = yr;
3138 if(bitm & WidthValue)
3139 xw.fw = (int)wr;
3140 if(bitm & HeightValue)
3141 xw.fh = (int)hr;
3142 if(bitm & XNegative && xw.fx == 0)
3143 xw.fx = -1;
3144 if(bitm & XNegative && xw.fy == 0)
3145 xw.fy = -1;
3146
3147 if(xw.fh != 0 && xw.fw != 0)
3148 xw.isfixed = True;
3149 break;
3150 case 'o':
3151 if(++i < argc)
3152 opt_io = argv[i];
3153 break;
3154 case 't':
3155 if(++i < argc)
3156 opt_title = argv[i];
3157 break;
3158 case 'v':
3159 default:
3160 die(USAGE);
3161 case 'w':
3162 if(++i < argc)
3163 opt_embed = argv[i];
3164 break;
3165 }
3166 }
3167
3168 run:
3169 setlocale(LC_CTYPE, "");
3170 XSetLocaleModifiers("");
3171 tnew(80, 24);
3172 xinit();
3173 ttynew();
3174 selinit();
3175 run();
3176
3177 return 0;
3178 }
3179