/*!
 * fontResize JavaScript 
 * http://simplersolutions.biz
 *
 * resize the font
 * 
 * LICENSE:   Creative Commons – Attribution required
 *
 * author    simpler solutions <info@simplersolutions.biz>
 * license   Creative Commons – Attribution required
 * version   CVS: $Id$
 * link      http://simplersolutions.biz
 */

/**
 * Resize the font on your page
 * 
 * @example $('#fontResizer').fontResize();
 * @desc Add the font resizer logic into node 'fontResizer'.
 * @example $('#fontResizer).fontResize({defaultLabels :'<a href="" class="decreaseFont fontresize">smaller</a><a href="" class="normalizeFont fontresize">normal</a><a href="" class="increaseFont fontresize">bigger</a>'});
 * @desc Add the font resizer logic into node 'fontResizer' and change how the html looks
 * @example $('#fontResizer').fontResize({defaultSize :'16px'});
 * @name $.cookie
 * @cat Plugins/Cookie
 * @author simplersolutions.biz
 */
( function($) {
	$.fn.fontResize = function(parms) {

		// set the options include any overrides
		var opts = $.extend( {}, $.fn.fontResize.defaults, parms);

		
		this.each( function() {
			
				// create the node with the links
				$(this).append(opts.defaultLabels);

				// if the cookie exists then use it
				if ($.cookie(opts.defaultCookieName)) {
					$.fn.fontResize.reSize(false, $.cookie(opts.defaultCookieName));
				}

				// bind increases
				$('.' + opts.defaultIncreaseClass).click( function() {
					$.fn.fontResize.reSize(true, opts.IncreaseSize);
					return false;
				});

				// bind decreases
				$('.' + opts.defaultDecreaseClass).click( function() {
					$.fn.fontResize.reSize(false, opts.DecreaseSize);
					return false;
				});

				// bind reset to default size
				$('.' + opts.defaultNormalizeClass).click( function() {
					$.fn.fontResize.reSize(false, opts.defaultSize);
					return false;
				});
			});
	};

	$.fn.fontResize.reSize = function(increase, absoluteValue) {
		

		// if setting absolute value use that rather than calculating new value
		if (absoluteValue) {
			$($.fn.fontResize.defaults.defaultTargetNode).css("font-size",
					absoluteValue);
			// delete the cookie if it is the default size anyway
			if (absoluteValue == $.fn.fontResize.defaults.defaultSize) {
				$.cookie($.fn.fontResize.defaults.defaultCookieName, null,$.fn.fontResize.defaults.defaultcookieParms);
			}
			return;
		}

		// calculate change factor
		var changeFactor = increase ? 1 + ($.fn.fontResize.defaults.defaultChangePercent / 100)
				: 1 - ($.fn.fontResize.defaults.defaultChangePercent / 100);

		// find existing target element to resize
		var nodeCurrentSize = $($.fn.fontResize.defaults.defaultTargetNode).css(
				"font-size");

		// split out the numeric element
		var numericPart = parseInt(nodeCurrentSize);

		// if we got garbage leave now
		if (isNaN(numericPart)) {
			return;
		}

		// split out the units eg %,px,em
		var unitsPart = nodeCurrentSize.replace(numericPart, "");

		// calculate new font size
		var newFontSize = Math.round(parseInt(nodeCurrentSize) * changeFactor)
				+ unitsPart;

		// resize
		$($.fn.fontResize.defaults.defaultTargetNode)
				.css("font-size", newFontSize);
		return $.cookie($.fn.fontResize.defaults.defaultCookieName, newFontSize,
				$.fn.fontResize.defaults.defaultcookieParms);

	};
})(jQuery);

  /*
	 * ! Abstract defaults into properties, change if you wish note that
	 * available defaultcookieParms are { expires: n, path: '/abc', domain:
	 * 'yourdomain', secure: boolean }
	 * place function outside of closure so that it can be overriden
	 * 
	 */
	$.fn.fontResize.defaults = {

		defaultTargetNode :"body",
		defaultChangePercent :15,
		defaultSize :"12px",
		IncreaseSize :"15px",
		DecreaseSize :"10px",
		defaultLabels :'<span id="accessLabel">Accessibility |</span><a href="" class="decreaseFont fontresize">A</a><a href="" class="normalizeFont fontresize">A</a><a href="" class="increaseFont fontresize">A</a>',
		defaultDecreaseClass :"decreaseFont",
		defaultIncreaseClass :"increaseFont",
		defaultNormalizeClass :"normalizeFont",
		defaultInsertionNode :"fontResizer",
		defaultCookieName :"fontResizer",
		defaultcookieParms : {
			expires :3,
			path :'/'
			}
	};