/*
 * jFontToggle JavaScript Library Plugin v1.0
 * http://d.hatena.jp/
 *
 * Copyright (c) 2009 Nully
 *
 * Dual licensed under the MIT and GPL licenses:
 * http://www.opensource.org/licenses/mit-license.php
 * http://www.gnu.org/licenses/gpl.html
 */
(function($){
	// font size switcher function
	$.fn.jFontToggle = function(setting) {
		var config = $.extend({
			className    : "jft-switch-button",
			cookieName   : "jft_cookie",
			changeTarget : "#switchTarget",
			absolutPath  : window.location.protocol + window.location.hostname + window.location.pathname,
			cookieOption : {
				expires: 3,
				path: '/',
				domain: window.location.domain,
				secure: false
				}
		}, setting || {} ) ;

		// find [rel='.css'] Elemet.
		$(this).find("[rel$='.css']").each(function(){
			// set data this style file.
			$(this).data("change_style", jQuery(this).attr("rel")).removeAttr("rel").addClass(config.className);
			
			// click event.
			$(this).click(function(ev){
				// set data, style sheet path.
				$(config.changeTarget).attr("href", jQuery(this).data("change_style")) ;
				// 
				$.jFontCookie(config.cookieName, jQuery(this).data("change_style"), config.cookieOption) ;
				ev.preventDefault() ;
			}) ;
		});
		
		// has several days ago...?
		if( $.jFontCookie(config.cookieName) ) {
			// load default style
			$(config.changeTarget).attr("href", $.jFontCookie(config.cookieName));
		}
	} ;
	
	
	/**
	 * Cookie plugin
	 *
	 * Copyright (c) 2006 Klaus Hartl (stilbuero.de)
	 * Dual licensed under the MIT and GPL licenses:
	 * http://www.opensource.org/licenses/mit-license.php
	 * http://www.gnu.org/licenses/gpl.html
	 *
	 */
	// self cookie function,
	// Thanks Mr.Klaus Hartl !
	$.jFontCookie = function(name, value, options) {
    if (typeof value != 'undefined') { // name and value given, set cookie
        options = options || {};
        if (value === null) {
            value = '';
            options.expires = -1;
        }
        var expires = '';
        if (options.expires && (typeof options.expires == 'number' || options.expires.toUTCString)) {
            var date;
            if (typeof options.expires == 'number') {
                date = new Date();
                date.setTime(date.getTime() + (options.expires * 24 * 60 * 60 * 1000));
            } else {
                date = options.expires;
            }
            expires = '; expires=' + date.toUTCString(); // use expires attribute, max-age is not supported by IE
        }
        // CAUTION: Needed to parenthesize options.path and options.domain
        // in the following expressions, otherwise they evaluate to undefined
        // in the packed version for some reason...
        var path = options.path ? '; path=' + (options.path) : '';
        var domain = options.domain ? '; domain=' + (options.domain) : '';
        var secure = options.secure ? '; secure' : '';
        document.cookie = [name, '=', encodeURIComponent(value), expires, path, domain, secure].join('');
    } else { // only name given, get cookie
        var cookieValue = null;
        if (document.cookie && document.cookie != '') {
            var cookies = document.cookie.split(';');
            for (var i = 0; i < cookies.length; i++) {
                var cookie = jQuery.trim(cookies[i]);
                // Does this cookie string begin with the name we want?
                if (cookie.substring(0, name.length + 1) == (name + '=')) {
                    cookieValue = decodeURIComponent(cookie.substring(name.length + 1));
                    break;
                }
            }
        }
        return cookieValue;
    }
	} ;
})(jQuery);