/*!

 * http://jqueryui.com

 *

 * Copyright jQuery Foundation and other contributors

 * Released under the MIT license.

 * http://jquery.org/license

 */

//>>label: Explode Effect

//>>group: Effects

//>>description: Explodes an element in all directions into n pieces. Implodes an element to its original wholeness.

//>>docs: http://api.jqueryui.com/explode-effect/

//>>demos: http://jqueryui.com/effect/

( function( factory ) {

	if ( typeof define === "function" && define.amd ) {

		// AMD. Register as an anonymous module.

		define( [

			"jquery",

			"./effect"

		], factory );

	} else {

		// Browser globals

		factory( jQuery );

	}

return $.effects.define( "explode", "hide", function( options, done ) {

	var i, j, left, top, mx, my,

		rows = options.pieces ? Math.round( Math.sqrt( options.pieces ) ) : 3,

		cells = rows,

		element = $( this ),

		mode = options.mode,

		show = mode === "show",

		// Show and then visibility:hidden the element before calculating offset

		offset = element.show().css( "visibility", "hidden" ).offset(),

		// Width and height of a piece

		width = Math.ceil( element.outerWidth() / cells ),

		height = Math.ceil( element.outerHeight() / rows ),

		pieces = [];

	// Children animate complete:

	function childComplete() {

		pieces.push( this );

		if ( pieces.length === rows * cells ) {

			animComplete();

		}

	}

	// Clone the element for each row and cell.

	for ( i = 0; i < rows; i++ ) { // ===>

		top = offset.top + i * height;

		my = i - ( rows - 1 ) / 2;

		for ( j = 0; j < cells; j++ ) { // |||

			left = offset.left + j * width;

			mx = j - ( cells - 1 ) / 2;

			// Create a clone of the now hidden main element that will be absolute positioned

			// within a wrapper div off the -left and -top equal to size of our pieces

			element

				.clone()

				.appendTo( "body" )

				.wrap( "<div></div>" )

				.css( {

					position: "absolute",

					visibility: "visible",

					left: -j * width,

					top: -i * height

				} )

				// Select the wrapper - make it overflow: hidden and absolute positioned based on

				// where the original was located +left and +top equal to the size of pieces

				.parent()

		}

	}

	function animComplete() {

		element.css( {

			visibility: "visible"

		} );

		$( pieces ).remove();

		done();

	}

} );