1/**
  2 * Accordion-folding functionality.
  3 *
  4 * Markup with the appropriate classes will be automatically hidden,
  5 * with one section opening at a time when its title is clicked.
  6 * Use the following markup structure for accordion behavior:
  7 *
  8 * <div class="accordion-container">
  9 *	<div class="accordion-section open">
 10 *		<h3 class="accordion-section-title"><button type="button" aria-expanded="true" aria-controls="target-1"></button></h3>
 11 *		<div class="accordion-section-content" id="target">
 12 *		</div>
 13 *	</div>
 14 *	<div class="accordion-section">
 15 *		<h3 class="accordion-section-title"><button type="button" aria-expanded="false" aria-controls="target-2"></button></h3>
 16 *		<div class="accordion-section-content" id="target-2">
 17 *		</div>
 18 *	</div>
 19 *	<div class="accordion-section">
 20 *		<h3 class="accordion-section-title"><button type="button" aria-expanded="false" aria-controls="target-3"></button></h3>
 21 *		<div class="accordion-section-content" id="target-3">
 22 *		</div>
 23 *	</div>
 24 * </div>
 25 *
 26 * Note that any appropriate tags may be used, as long as the above classes are present.
 27 *
 28 * @since 3.6.0
 29 * @output wp-admin/js/accordion.js
 30 */
 31
 32( function( $ ){
 33
 34	$( function () {
 35
 36		// Expand/Collapse accordion sections on click.
 37		$( '.accordion-container' ).on( 'click', '.accordion-section-title button', function() {
 38			accordionSwitch( $( this ) );
 39		});
 40
 41	});
 42
 43	/**
 44	 * Close the current accordion section and open a new one.
 45	 *
 46	 * @param {Object} el Title element of the accordion section to toggle.
 47	 * @since 3.6.0
 48	 */
 49	function accordionSwitch ( el ) {
 50		var section = el.closest( '.accordion-section' ),
 51			container = section.closest( '.accordion-container' ),
 52			siblings = container.find( '.open' ),
 53			siblingsToggleControl = siblings.find( '[aria-expanded]' ).first(),
 54			content = section.find( '.accordion-section-content' );
 55
 56		// This section has no content and cannot be expanded.
 57		if ( section.hasClass( 'cannot-expand' ) ) {
 58			return;
 59		}
 60
 61		// Add a class to the container to let us know something is happening inside.
 62		// This helps in cases such as hiding a scrollbar while animations are executing.
 63		container.addClass( 'opening' );
 64
 65		if ( section.hasClass( 'open' ) ) {
 66			section.toggleClass( 'open' );
 67			content.toggle( true ).slideToggle( 150 );
 68		} else {
 69			siblingsToggleControl.attr( 'aria-expanded', 'false' );
 70			siblings.removeClass( 'open' );
 71			siblings.find( '.accordion-section-content' ).show().slideUp( 150 );
 72			content.toggle( false ).slideToggle( 150 );
 73			section.toggleClass( 'open' );
 74		}
 75
 76		// We have to wait for the animations to finish.
 77		setTimeout(function(){
 78		    container.removeClass( 'opening' );
 79		}, 150);
 80
 81		// If there's an element with an aria-expanded attribute, assume it's a toggle control and toggle the aria-expanded value.
 82		if ( el ) {
 83			el.attr( 'aria-expanded', String( el.attr( 'aria-expanded' ) === 'false' ) );
 84		}
 85	}
 86
 87})(jQuery);
 88