/**
 * Font Controller
 * For creating a font size changer interface with minimum effort
 * Copyright (c) 2009 Hafees (http://cool-javascripts.com)
 * License: Free to use, modify, distribute as long as this header is kept :)
 *
 */

/**
 * Required: jQuery 1.x library, 
 * Optional: jQuery Cookie Plugin (if used, the last used font size will be saved)
 * Usage: (For more details visit 
 * This function can be called inside a $(document).ready()
 * Eg: fontSize("#controls", "#content", 9, 12, 20); where,
 * #controls - where control is the element id, where the controllers will be created.
 * #content - for which element the font size changes to apply. In this case font size of content div will be changed
 * 9 - minimum font size
 * 12 - default font size
 * 20 - maximum font size
 * 
 */
(function($) {
	 $.fn.fontSize = function (container, target, minSize, defSize, maxSize) {
			/*Editable settings*/
			var minCaption = "Make font size smaller"; //title for smallFont button
			var defCaption = "Make font size default"; //title for defaultFont button
			var maxCaption = "Make font size larger"; //title for largefont button
			
			
			//Now we'll add the font size changer interface in container
			smallFontHtml = "<a href='javascript:void(0);' class='smallFont' title='" + minCaption +"'>" + minCaption + "</a> ";
			defFontHtml = "<a href='javascript:void(0);' class='defaultFont' title='" + defCaption +"'>" + defCaption + "</a> ";
			largeFontHtml = "<a href='javascript:void(0);' class='largeFont' title='" + maxCaption +"'>" + maxCaption + "</a> ";
			$(container).html(smallFontHtml + defFontHtml + largeFontHtml);
			
			//Read cookie & sets the fontsize
			if ($.cookie != undefined) {
				var cookie = target.replace(/[#. ]/g,'');
				var value = $.cookie(cookie);
				if (value !=null) {
					$(target).css('font-size', parseInt(value));
				}
			}
				
			//on clicking small font button, font size is decreased by 1px
			$(container + " .smallFont").click(function(){ 
				curSize = parseInt($(target).css("font-size"));
				newSize = curSize - 1;
				if (newSize >= minSize) {
					$(target).css('font-size', newSize);
				} 
				if (newSize <= minSize) {
					$(container + " .smallFont").addClass("sdisabled");
				}
				if (newSize < maxSize) {
					$(container + " .largeFont").removeClass("ldisabled");
				}
				updatefontCookie(target, newSize); //sets the cookie 
				
			});
		
			//on clicking default font size button, font size is reset
			$(container + " .defaultFont").click(function(){
				$(target).css('font-size', defSize);
				$(container + " .smallFont").removeClass("sdisabled");
				$(container + " .largeFont").removeClass("ldisabled");
				updatefontCookie(target, defSize);
			});
		
			//on clicking large font size button, font size is incremented by 1 to the maximum limit
			$(container + " .largeFont").click(function(){
				curSize = parseInt($(target).css("font-size"));
				newSize = curSize + 1;
				if (newSize <= maxSize) {
					$(target).css('font-size', newSize);
				} 
				if (newSize > minSize) {
					$(container + " .smallFont").removeClass("sdisabled");
				}
				if (newSize >= maxSize) {
					$(container + " .largeFont").addClass("ldisabled");
				}
				updatefontCookie(target, newSize);
			});
		
			function updatefontCookie(target, size) {
				if ($.cookie != undefined) { //If cookie plugin available, set a cookie
					var cookie = target.replace(/[#. ]/g,'');
					$.cookie(cookie, size,{ expires: 7, path: '/' });
				} 
			}
		}
})(jQuery);