// Livejournal OPML generator
// version 0.1
// 2005-05-06
// Public Domain
// Martin Davidsson <martin.davidsson at gmail.com>
//
// data: URI generation code copied from http://simon.incutio.com/archive/2003/08/11/selfContained
//
// --------------------------------------------------------------------
//
// This is a Greasemonkey user script.
//
// To install, you need Greasemonkey: http://greasemonkey.mozdev.org/
// Then restart Firefox and revisit this script.
// Under Tools, there will be a new menu item to "Install User Script".
// Accept the default configuration and install.
//
// To uninstall, go to Tools/Manage User Scripts,
// select "Livejournal OPML", and click Uninstall.
//
// --------------------------------------------------------------------
//
// ==UserScript==
// @name Livejournal OPML
// @namespace http://martin.davidssons.com/greasemonkey
// @description Generates OPML links on livejournal user info pages
// @include http://www.livejournal.com/userinfo.bml*
// ==/UserScript==
(function() {
function findPosition( el ) {
point = new Array();
top = 0;
left = 0;
try {
var obj = el;
if (obj.offsetParent) {
while (obj.offsetParent) {
top += obj.offsetTop;
left += obj.offsetLeft;
obj = obj.offsetParent;
}
}
} catch (e) {
}
point.push( top );
point.push( left );
return point;
}
var base64EncodeChars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
function base64encode(str) {
var out; var i; var len;
var c1; var c2; var c3;
var len = str.length;
var i = 0;
out = "";
while(i < len) {
c1 = str.charCodeAt(i++) & 0xff;
if(i == len) {
out += base64EncodeChars.charAt(c1 >> 2);
out += base64EncodeChars.charAt((c1 & 0x3) << 4);
out += "==";
break;
}
c2 = str.charCodeAt(i++);
if(i == len) {
out += base64EncodeChars.charAt(c1 >> 2);
out += base64EncodeChars.charAt(((c1 & 0x3) << 4) | ((c2 & 0xF0) >> 4));
out += base64EncodeChars.charAt((c2 & 0xF) << 2);
out += "=";
break;
}
c3 = str.charCodeAt(i++);
out += base64EncodeChars.charAt(c1 >> 2);
out += base64EncodeChars.charAt(((c1 & 0x3) << 4) | ((c2 & 0xF0) >> 4));
out += base64EncodeChars.charAt(((c2 & 0xF) << 2) | ((c3 & 0xC0) >> 6));
out += base64EncodeChars.charAt(c3 & 0x3F);
}
return out;
}
links = document.getElementsByTagName('a');
friends = new Array();
LJregex = /userinfo.bml\?user=[^&]*$/;
friendsRegex = /http:\/\/www\.livejournal\.com\/users\/.*\/friends/;
var anchor;
for (i = 0; i < links.length; i++) {
if( friendsRegex.test( links[i].href ) ) {
anchor = links[i];
}
else if (LJregex.test(links[i].href) ) {
friends[links[i].textContent] = links[i].href;
}
}
var OPML = '<?xml version="1.0" encoding="ISO-8859-1"?>';
OPML += '<opml version="1.1"><head><title>Livejournal Friends</title></head><body>';
for( name in friends ) {
var link = friends[name];
OPML += '<outline text="'+name+'" description="'+name+'" title="'+name+'" type="rss" version="RSS" htmlUrl="'+link+'" xmlUrl="http://www.livejournal.com/users/'+name+'/data/rss" />';
}
OPML += '</body></opml>';
var uri = 'data:text/xml;charset=utf-8';
OPML = base64encode(OPML);
uri += ';base64';
uri += ',' + escape(OPML);
point = findPosition( anchor );
var div = document.createElement('div');
div.style.position='absolute';
div.style.top = point[0]+17 + 'px';
div.style.left = point[1] + 'px';
var opmlIconImg = "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABQAAAAICAYAAAD5nd%2FtAAAACXBIWXMAAAsTAAALEwEAmpwYAAAABGdBTUEAALGeYUxB9wAAACBjSFJNAABtnAAAc5QAAM%2BpAACCNAAAbs4AAMMUAAA0wQAAKUuo4i7nAAAAbUlEQVR42mK8efPmfwYqAoAAYgERampqVDHs1q1bDAABxATjMDKehWNcfGS16GIwABBATMic%2F%2F%2BNGfDxkS3ABQACiAmfJEgzuqGEAEAAMaEbQMjFhFwNEEAsxHoXmQ9jY3M9QACxwGKHWgAgwAAG6y1q9gcHNgAAAABJRU5ErkJggg%3D%3D";
var opmlLink = document.createElement('a');
opmlLink.setAttribute('href', uri);
var opmlIcon = document.createElement('img');
opmlIcon.setAttribute('src', opmlIconImg);
opmlIcon.setAttribute('style', 'border: none');
opmlLink.appendChild( opmlIcon );
div.appendChild(opmlLink);
document.getElementsByTagName('body')[0].appendChild(div);
})();
