/**

 * jquery.purr.js

 * Copyright (c) 2008 Net Perspective (net-perspective.com)

 * Licensed under the MIT License (http://www.opensource.org/licenses/mit-license.php)

 * 

 * @author R.A. Ray

 * @projectDescription	jQuery plugin for dynamically displaying unobtrusive messages in the browser. Mimics the behavior of the MacOS program "Growl."

 * @version 0.1.0

 * 

 * @requires jquery.js (tested with 1.2.6)

 * 

 * @param fadeInSpeed 					int - Duration of fade in animation in miliseconds

 * 													default: 500

 *	@param fadeOutSpeed  				int - Duration of fade out animationin miliseconds

 														default: 500

 *	@param removeTimer  				int - Timeout, in miliseconds, before notice is removed once it is the top non-sticky notice in the list

 														default: 4000

 *	@param isSticky 						bool - Whether the notice should fade out on its own or wait to be manually closed

 														default: false

 *	@param usingTransparentPNG 	bool - Whether or not the notice is using transparent .png images in its styling

 														default: false

 */

( function( $ ) {

	$.purr = function ( notice, options )

	{ 

		// Convert notice to a jQuery object

		notice = $( notice );

		// Add a class to denote the notice as not sticky

		if ( !options.isSticky )

		{

			notice.addClass( 'not-sticky' );

		};

		// Get the container element from the page

		var cont = document.getElementById( 'purr-container' );

		// If the container doesn't yet exist, we need to create it

		if ( !cont )

		{

			cont = '<div id="purr-container"></div>';

		}

		// Convert cont to a jQuery object

		cont = $( cont );

		// Add the container to the page

		$( 'body' ).append( cont );

		notify();

		function notify ()

		{	

			// Set up the close button

			var close = document.createElement( 'a' );

			$( close ).attr(	

				{

					className: 'close',

					href: '#close',

					innerHTML: 'Close'

				}

			)

				.appendTo( notice )

					.click( function ()

						{

							removeNotice();

							return false;

						}

					);

			// Add the notice to the page and keep it hidden initially

			notice.appendTo( cont )

				.hide();

			if ( jQuery.browser.msie && options.usingTransparentPNG )

			{

				// IE7 and earlier can't handle the combination of opacity and transparent pngs, so if we're using transparent pngs in our

				// notice style, we'll just skip the fading in.

				notice.show();

			}

			else

			{

				//Fade in the notice we just added

				notice.fadeIn( options.fadeInSpeed );

			}

			// Set up the removal interval for the added notice if that notice is not a sticky

			if ( !options.isSticky )

			{

				var topSpotInt = setInterval( function ()

				{

					// Check to see if our notice is the first non-sticky notice in the list

					if ( notice.prevAll( '.not-sticky' ).length == 0 )

					{ 

						// Stop checking once the condition is met

						clearInterval( topSpotInt );

						// Call the close action after the timeout set in options

						setTimeout( function ()

							{

								removeNotice();

							}, options.removeTimer

						);

					}

				}, 200 );	

			}

		}

		function removeNotice ()

		{

			// IE7 and earlier can't handle the combination of opacity and transparent pngs, so if we're using transparent pngs in our

			// notice style, we'll just skip the fading out.

			if ( jQuery.browser.msie && options.usingTransparentPNG )

			{

				notice.css( { opacity: 0	} )

					.animate( 

						{ 

							height: '0px' 

						}, 

						{ 

							duration: options.fadeOutSpeed, 

							complete:  function ()

								{

									notice.remove();

								} 

							} 

					);

			}

			else

			{

				// Fade the object out before reducing its height to produce the sliding effect

				notice.animate( 

					{ 

						opacity: '0'

					}, 

					{ 

						duration: options.fadeOutSpeed, 

						complete: function () 

							{

								notice.animate(

									{

										height: '0px'

									},

									{

										duration: options.fadeOutSpeed,

										complete: function ()

											{

												notice.remove();

											}

									}

								);

							}

					} 

				);

			}

		};

	};

	$.fn.purr = function ( options )

	{

		options = options || {};

		options.fadeInSpeed = options.fadeInSpeed || 500;

		options.fadeOutSpeed = options.fadeOutSpeed || 500;

		options.removeTimer = options.removeTimer || 4000;

		options.isSticky = options.isSticky || false;

		options.usingTransparentPNG = options.usingTransparentPNG || false;

		this.each( function() 

			{

				new $.purr( this, options );

			}

		);

		return this;

	};

})( jQuery );