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mothra.c: add Plumb menu item, and update man page. my original changes sanity-checked by Ori_B.

--- a/sys/src/cmd/mothra/mothra.c

+++ b/sys/src/cmd/mothra/mothra.c

@@ -95,6 +95,7 @@

 	"moth mode",

 	"snarf",

 	"paste",

+	"plumb",

 	"search",

 	"save hit",

 	"hit list",

@@ -936,6 +937,7 @@

 		return url->fullname;

 	return url->reltext;

 }

+

 Url *copyurl(Url *u){

 	Url *v;

 	v=emalloc(sizeof(Url));

@@ -944,11 +946,13 @@

 	v->basename = strdup(u->basename);

 	return v;

 }

+

 void freeurl(Url *u){

 	free(u->reltext);

 	free(u->basename);

 	free(u);

 }

+

 void seturl(Url *url, char *urlname, char *base){

 	url->reltext = strdup(urlname);

 	url->basename = strdup(base);

@@ -956,6 +960,7 @@

 	url->tag[0] = 0;

 	url->map = 0;

 }

+

 Url* selurl(char *urlname){

 	Url *last;

@@ -1167,7 +1172,9 @@

 	plpaste(p);

 }

 void hit3(int button, int item){

+	char buf[1024];

 	char name[NNAME];

+	char *s;

 	Panel *swap;

 	int fd;

 	USED(button);

@@ -1199,9 +1206,27 @@

 		paste(plkbfocus);

 		break;

 	case 4:

-		search();

+		if(plkbfocus==nil || plkbfocus==cmd){

+			if(text==nil || text->snarf==nil || selection==nil)

+				return;

+			if((s=text->snarf(text))==nil)

+				s=smprint("%s", urlstr(selection));

+		}else

+			if((s=plkbfocus->snarf(plkbfocus))==nil)

+				return;

+		if((fd=plumbopen("send", OWRITE))<0){

+			message("can't plumb");

+			free(s);

+			return;

+		}

+		plumbsendtext(fd, "mothra", nil, getwd(buf, sizeof buf), s);

+		close(fd);

+		free(s);

 		break;

 	case 5:

+		search();

+		break;

+	case 6:

 		if(!selection){

 			message("no url selected");

 			break;

@@ -1221,11 +1246,11 @@

 		fprint(fd, "<p><a href=\"%s\">%s</a>\n", urlstr(selection), urlstr(selection));

 		close(fd);

 		break;

-	case 6:

+	case 7:

 		snprint(name, sizeof(name), "file:%s/hit.html", mkhome());

 		geturl(name, -1, 1, 0);

 		break;

-	case 7:

+	case 8:

 		if(confirm(3))

 			exits(0);

 		break;