/*
* Copyright (c) 2010, webvariants GbR, http://www.webvariants.de
*
* This file is released under the terms of the MIT license. You can find the
* complete text in the attached LICENSE file or online at:
*
* http://www.opensource.org/licenses/mit-license.php
*/
/**
* Small jQuery plugin to add facebook like-button-support to any dom-element.
*
* This is very useful, if a website should have a free styled like-button and
* it gives a better tracking-protection for the user.
*
* Features:
* - Any dom-element can be used as a like button. Typically you add this to an
* image.
* - Facebook code will not be fetched, unless the user moves his mouse over
* the like-button element. This gives the user a far better tracking
* protection and the like is still one click away.
*
* Disadvantages:
* Some Facebook-features will not work with this implementation:
* - The count of likes will not be visible, because the real facebook-like
* button is not shown and facebook does not provide this information via API
* - It is not possible to show, if the user likes this page already. Therefore
* dislike can not be shown. But if the user already likes the page, the
* funktionality is dislike, though.
*
* Usage:
* $(SELECTOR).addLikeSupport(URL);
*
* Example:
* $('#likeImage').addLikeSupport('http://www.google.de');
*/
(function($) {
$.fn.addLikeSupport = function(src) {
if (!$(this).length) return this;
var tester = $('');
$('body').append(tester);
var offset = tester.offset();
tester.remove();
var button;
if (!button) {
src = urlencode(src);
// button = $('');
button = $('');
$('body').append(button);
}
$(this).css('cursor', 'pointer').mousemove(function(e) {
/*
if (!button) {
src = urlencode(src);
button = $('');
$('body').append(button);
}
*/
button.css({'left': e.pageX-offset.left-2+'px', 'top': e.pageY-offset.top-2+'px'});
});
/*
$(this).click(function() {
button.hide();
$(this).hide();
});
*/
}
urlencode = function(str) {
// URL-encodes string
// version: 1102.614
// function from http://phpjs.org/functions/urlencode:573
str = (str + '').toString();
return encodeURIComponent(str).replace(/!/g, '%21').replace(/'/g, '%27').replace(/\(/g, '%28').replace(/\)/g, '%29').replace(/\*/g, '%2A').replace(/%20/g, '+');
}
})(jQuery);