#include <u.h>#include <libc.h>#include <draw.h>#include <event.h> typedef struct KbMap KbMap;struct KbMap {	char *name;	char *file;	Rectangle r;	int current;}; KbMap *map;int nmap;Image *lightblue;Image *justblue; enum {	PAD = 3,	MARGIN = 5}; char *dir = "/sys/lib/kbmap"; void*erealloc(void *v, ulong n){	v = realloc(v, n);	if(v == nil)		sysfatal("out of memory reallocating %lud", n);	return v;} void*emalloc(ulong n){	void *v; 	v = malloc(n);	if(v == nil)		sysfatal("out of memory allocating %lud", n);	memset(v, 0, n);	return v;} char*estrdup(char *s){	int l;	char *t; 	if (s == nil)		return nil;	l = strlen(s)+1;	t = emalloc(l);	memcpy(t, s, l); 	return t;} voidinit(void){	int i, fd, nr;	Dir *pd;	char buf[128]; 	if((fd = open(dir, OREAD)) < 0)		return; 	nmap = nr = dirreadall(fd, &pd);	map = emalloc(nr * sizeof(KbMap));	for(i=0; i<nr; i++){		sprint(buf, "%s/%s", dir, pd[i].name);		map[i].file = estrdup(buf);		map[i].name = estrdup(pd[i].name);		map[i].current = 0;	}	free(pd); 	close(fd);} voiddrawmap(int i){	if(map[i].current)		draw(screen, map[i].r, justblue, nil, ZP);	else		draw(screen, map[i].r, lightblue, nil, ZP); 	_string(screen, addpt(map[i].r.min, Pt(2,0)), display->black, ZP,		font, map[i].name, nil, strlen(map[i].name), 		map[i].r, nil, ZP, SoverD);	border(screen, map[i].r, 1, display->black, ZP);	} voidgeometry(void){	int i, rows;	Rectangle r; 	rows = (Dy(screen->r)-2*MARGIN+PAD)/(font->height+PAD); 	r = Rect(0,0,(Dx(screen->r)-2*MARGIN), font->height);	for(i=0; i<nmap; i++)		map[i].r = rectaddpt(rectaddpt(r, Pt(MARGIN+(PAD+Dx(r))*(i/rows),					MARGIN+(PAD+Dy(r))*(i%rows))), screen->r.min); } voidredraw(Image *screen){	int i; 	draw(screen, screen->r, lightblue, nil, ZP);	for(i=0; i<nmap; i++)		drawmap(i);	flushimage(display, 1);} voideresized(int new){	if(new && getwindow(display, Refmesg) < 0)		fprint(2,"can't reattach to window");	geometry();	redraw(screen);} intwritemap(char *file){	int i, fd, ofd;	char buf[8192]; 	if((fd = open(file, OREAD)) < 0){		fprint(2, "cannot open %s: %r", file);		return -1;	}	if((ofd = open("/dev/kbmap", OWRITE)) < 0) {		fprint(2, "cannot open /dev/kbmap: %r");		close(fd);		return -1;	}	while((i = read(fd, buf, sizeof buf)) > 0)		if(write(ofd, buf, i) != i){			fprint(2, "writing /dev/kbmap: %r");			break;		} 	close(fd);	close(ofd);	return 0;} voidclick(Mouse m){	int i, j;	char buf[128]; 	if(m.buttons == 0 || (m.buttons & ~4))		return; 	for(i=0; i<nmap; i++)		if(ptinrect(m.xy, map[i].r))			break;	if(i == nmap)		return; 	do		m = emouse();	while(m.buttons == 4); 	if(m.buttons != 0){		do			m = emouse();		while(m.buttons);		return;	} 	for(j=0; j<nmap; j++)		if(ptinrect(m.xy, map[j].r))			break;	if(j != i)		return; 	/* since maps are often just a delta of the distributed map... */	snprint(buf, sizeof buf, "%s/ascii", dir);	writemap(buf);	writemap(map[i].file); 	/* clean the previous current map */	for(j=0; j<nmap; j++)		map[j].current = 0; 	map[i].current = 1; 	redraw(screen);} voidusage(void){	fprint(2, "usage: kbmap [file...]\n");	exits("usage");} voidmain(int argc, char **argv){	Event e;	char *c; 	if(argc > 1) {		argv++; argc--;		map = emalloc((argc)*sizeof(KbMap));		while(argc--) {			map[argc].file = estrdup(argv[argc]);			c = strrchr(map[argc].file, '/');			map[argc].name = (c == nil ? map[argc].file : c+1);			map[argc].current = 0;			nmap++;		}	} else 		init(); 	initdraw(0, 0, "kbmap");	lightblue = allocimagemix(display, DPalebluegreen, DWhite);	if(lightblue == nil)		sysfatal("allocimagemix: %r");	justblue = allocimagemix(display, DBlue, DWhite);	if(justblue == nil)		sysfatal("allocimagemix: %r"); 	eresized(0);	einit(Emouse|Ekeyboard); 	for(;;){		switch(eread(Emouse|Ekeyboard, &e)){		case Ekeyboard:			if(e.kbdc==0x7F || e.kbdc=='q')				exits(0);			break;		case Emouse:			if(e.mouse.buttons)				click(e.mouse);			break;		}	}}