/* http://keith-wood.name/bookmark.html
   Sharing bookmarks for jQuery v1.1.2.
   Written by Keith Wood (kbwood{at}iinet.com.au) March 2008.
   Dual licensed under the GPL (http://dev.jquery.com/browser/trunk/jquery/GPL-LICENSE.txt) and 
   MIT (http://dev.jquery.com/browser/trunk/jquery/MIT-LICENSE.txt) licenses. 
*/
(function($) { // Hide scope, no $ conflict
var PROP_NAME = 'bookmark';
/* Bookmark sharing manager. */
function Bookmark() {     
	this._defaults = {
		url: '',  // The URL to bookmark, leave blank for the current page
		title: '',  // The title to bookmark, leave blank for the current one
		sites: [],  // List of site IDs to use, empty for all
		icons: '/js/jquery/bookmark/bookmarks.png', // Horizontal amalgamation of all site icons
		iconSize: 16,  // The size of the individual icons
		target: '_blank',  // The name of the target window for the bookmarking links
		compact: true,  // True if a compact presentation should be used, false for full
		hint: 'Condividi su {s}',  // Popup hint for links, {s} is replaced by display name
		popup: false, // True to have it popup on demand, false to show always
		popupText: 'Bookmarka questa pagina', // Text for the popup trigger
		addFavorite: false,  // True to add a 'add to favourites' link, false for none
		favoriteText: 'Preferito',  // Display name for the favourites link
		favoriteIcon: 0,  // Icon for the favourites link
		addEmail: false,  // True to add a 'e-mail a friend' link, false for none
		emailText: 'E-mail',  // Display name for the e-mail link
		emailIcon: 1,  // Icon for the e-mail link
		emailSubject: 'Pagina interessante',  // The subject for the e-mail
		emailBody: 'Penso che questa pagina sia interessante:\n{t} ({u})', // The body of the e-mail
			// Use '{t}' for the position of the page title, '{u}' for the page URL, and '\n' for new lines
		manualBookmark: 'Chiudi questa finestra di dialog e\npremi Ctrl-D per bookmarkare la pagina.'
			// Instructions for manually bookmarking the page
	};
	this._sites = {  // The definitions of the available bookmarking sites
		'delicious': {display: 'Delicious', icon: 7,
			url: 'http://del.icio.us/post?url={u}&title={t}'},
		'digg': {display: 'Digg', icon: 8,
			url: 'http://digg.com/submit?phase=2&url={u}&title={t}'},
		'facebook': {display: 'Facebook', icon: 11,
			url: 'http://www.facebook.com/sharer.php?u={u}&t={t}'},
		'google': {display: 'Google', icon: 16,
			url: 'http://www.google.com/bookmarks/mark?op=edit&bkmk={u}&title={t}'},
		'myspace': {display: 'MySpace', icon: 25,
			url: 'http://www.myspace.com/Modules/PostTo/Pages/?c={u}&t={t}'},
		'twitthis': {display: 'Twitter', icon: 45,
			url: 'http://twitthis.com/twit?url={u}'}
	};
}
$.extend(Bookmark.prototype, {
	/* Class name added to elements to indicate already configured with bookmarking. */
	markerClassName: 'hasBookmark',

	addSite: function(id, display, icon, url) {
		this._sites[id] = {display: display, icon: icon, url: url};
		return this;
	},
	getSites: function() {
		return this._sites;
	},
	_attachBookmark: function(target, settings) {
		target = $(target);
		if (target.hasClass(this.markerClassName)) {
			return;
		}
		target.addClass(this.markerClassName);
		this._updateBookmark(target, settings);
	},
	_changeBookmark: function(target, settings) {
		target = $(target);
		if (!target.hasClass(this.markerClassName)) {
			return;
		}
		this._updateBookmark(target, settings);
	},
	_updateBookmark: function(target, settings) {
		var oldSettings = $.data(target[0], PROP_NAME) || $.extend({}, this._defaults);
		settings = extendRemove(oldSettings, settings || {});
		$.data(target[0], PROP_NAME, settings);
		var sites = settings.sites;
		if (sites.length == 0) {
			$.each(this._sites, function(id) {
				sites.push(id);
			});
		}
		var hint = settings.hint || '{s}';
		var html = (settings.popup ? '<a class="bookmark_popup_text" href="#" onclick="javascript:return false;">' +
			settings.popupText + '</a><div class="bookmark_popup">' : '') +
			'<ul class="bookmark_list' + (settings.compact ? ' bookmark_compact' : '') + '">';
		var addSite = function(display, icon, url, onclick) {
			var html = '<li><a href="' + url + '"' + (onclick ? ' onclick="' + onclick + '"' :
				(settings.target ? ' target="' + settings.target + '"' : '')) + '>';
			if (icon != null) {
				var title = hint.replace(/\{s\}/, display);
				if (typeof icon == 'number') {
					html += '<span title="' + title + '" style="background: ' +
						'transparent url(' + settings.icons + ') no-repeat -' +
						(icon * settings.iconSize) + 'px 0px;' +
						($.browser.mozilla && $.browser.version < '1.9' ?
						' padding-left: ' + settings.iconSize + 'px; padding-bottom: ' +
						Math.max(0, (settings.iconSize / 2) - 5) + 'px;' : '') + '"></span>';
				}
				else {
					html += '<img src="' + icon + '" alt="' + title + '" title="' +
						title + '"' + (($.browser.mozilla && $.browser.version < '1.9') ||
						($.browser.msie && $.browser.version < '7.0') ?
						' style="vertical-align: bottom;"' :
						($.browser.msie ? ' style="vertical-align: middle;"' :
						($.browser.opera || $.browser.safari ?
						' style="vertical-align: baseline;"' : ''))) + '/>';
				}
				html +=	(settings.compact ? '' : '&#xa0;');
			}
			html +=	(settings.compact ? '' : display) + '</a></li>';
			return html;
		};
		var url = settings.url || window.location.href;
		var title = settings.title || document.title;
		if (settings.addFavorite) {
			html += addSite(settings.favoriteText, settings.favoriteIcon,
				'#', 'jQuery.bookmark._addFavourite(\'' + url + '\',\'' + title + '\')');
		}
		if (settings.addEmail) {
			html += addSite(settings.emailText, settings.emailIcon,
				'mailto:?subject=' + encodeURIComponent(settings.emailSubject) +
				'&amp;body=' + encodeURIComponent(settings.emailBody.
				replace(/{u}/, url).replace(/{t}/, title)));
		}
		url = encodeURIComponent(url);
		title = encodeURIComponent(title);
		var allSites = this._sites;
		$.each(sites, function(index, id) {
			var site = allSites[id];
			if (site) {
				html += addSite(site.display, site.icon,
					site.url.replace(/{u}/, url).replace(/{t}/, title));
			}
		});
		html += '</ul>' + (settings.popup ? '</div>' : '');
		target.html(html);
		if (settings.popup) {
			$(target).click(function() {
				var target = $(this);
				var offset = target.offset();
				var extras = $.bookmark._getExtras(target);
				$('.bookmark_popup', target)
					.toggle();
			});
		}
	},
	_getExtras: function(elem) {
		var convert = function(value) {
			return {thin: 1, medium: 3, thick: 5}[value] || value;
		};
		return [parseInt(convert(elem.css('border-left-width')), 10) +
			parseInt(convert(elem.css('border-right-width')), 10) +
			parseInt(elem.css('padding-left'), 10) + parseInt(elem.css('padding-right'), 10),
			parseInt(convert(elem.css('border-top-width')), 10) +
			parseInt(convert(elem.css('border-bottom-width')), 10) +
			parseInt(elem.css('padding-top'), 10) + parseInt(elem.css('padding-bottom'), 10)];
	},
	_destroyBookmark: function(target) {
		target = $(target);
		if (!target.hasClass(this.markerClassName)) {
			return;
		}
		target.removeClass(this.markerClassName).empty();
		$.removeData(target[0], PROP_NAME);
	},
	_addFavourite: function(url, title) {
		if ($.browser.msie) {
			window.external.addFavorite(url, title);
		}
		else {
			alert(this._defaults.manualBookmark);
		}
	}
});
function extendRemove(target, props) {
	$.extend(target, props);
	for (var name in props) {
		if (props[name] == null) {
			target[name] = null;
		}
	}
	return target;
}
$.fn.bookmark = function(options) {
	var otherArgs = Array.prototype.slice.call(arguments, 1);
	return this.each(function() {
		if (typeof options == 'string') {  
			$.bookmark['_' + options + 'Bookmark'].
				apply($.bookmark, [this].concat(otherArgs));
		}
		else {
			$.bookmark._attachBookmark(this, options || {});
		}
	});    
};
$.bookmark = new Bookmark(); // singleton instance

})(jQuery);