/**
 * Text Resizzle	
 * For resizing text by attaching specific classes to a parent element. 
 * For more information, demos etc, see the page in confluence. 
 * @author Henry Singleton
 * @date Nov 3 2010 
 */

(function($) {
	$.fn.textResizzle = function(options) {
		
		var settings = {
			parent: '#primary',				// select the parent to apply the size classes to
			increaseSizeSelector: '#text-resize', // select element to use for increase font size button or link. 
			//decreaseSizeSelector: '#text-down', // select element to use for decrease font size button or link. 
			sizes: [					// specify an array of the sizes. These will be applied as class names to the parent element (selected above) to allow you to overide layout and font sizes. 
				'normal',
				'large'
			],
			defaultSize: 'normal', 		// specify which size above is the default. 
			saveCookie: true,			// choose weather to save the selected font size in a cookie
			cookieName: 'textResizzle'
		};
		
		if (options) {
			$.extend(settings,options);
		}
		
		//set the default size
		var currentSize = settings.defaultSize;
		
		//set up our container
		var parent = $(settings.parent);
			
		// set up the increase and decrease selectors
		
		$(settings.increaseSizeSelector).click(increaseSize);
		//$(settings.decreaseSizeSelector).click(decreaseSize);
			
		//set the size to whatever is stored in the current cookie
		if ($.cookies.get(settings.cookieName)) {
			setSize($.cookies.get(settings.cookieName));
		}

		function increaseSize() {
			
			/* alert(jQuery.inArray(currentSize, settings.sizes)); */
			//get the next size up index
			var nextSize = jQuery.inArray(currentSize, settings.sizes) + 1;
	
			//check if we have reached the top of the sizing.
			if (nextSize >= settings.sizes.length) {
				//return false;
				
				//get the next size up index
				var previousSize = jQuery.inArray(currentSize, settings.sizes) - 1;
		
				//check if we have reached the top of the sizing.
				if (previousSize < 0) {
					//return false;
				}
				
				//set the new size
				setSize(settings.sizes[previousSize]);
				
				return false;
				
			}
			
			//set the new size
			setSize(settings.sizes[nextSize]);
			
			return false;
		}
		
		function decreaseSize() {
			//get the next size up index
			var previousSize = jQuery.inArray(currentSize, settings.sizes) - 1;
	
			//check if we have reached the top of the sizing.
			if (previousSize < 0) {
				return false;
			}
			
			//set the new size
			setSize(settings.sizes[previousSize]);
			
			return false;
	
		}
		
		//explicitly set the size. Will normally only be called internally. 
		function setSize(size) {
			
			if (typeof size == undefined) {
				size = settings.defaultSize;
			}
			
			parent.removeClass(currentSize);
			
			//set the new size
			parent.addClass(size);
			
			//write the new size to the current object
			currentSize = size;
			
			//write the change to the cookie
			if (settings.saveCookie) {
				$.cookies.set(settings.cookieName, size, { path: '/'});
			}
			
			//Cufon.refresh();
		}
		
		return this;
	}	
})(jQuery);