1 files changed, 94 insertions, 0 deletions
diff --git a/wp-admin/js/accordion.js b/wp-admin/js/accordion.js
new file mode 100644
index 0000000..c420e8c
--- /dev/null
+++ b/wp-admin/js/accordion.js
@@ -0,0 +1,94 @@
+/**
+ * Accordion-folding functionality.
+ *
+ * Markup with the appropriate classes will be automatically hidden,
+ * with one section opening at a time when its title is clicked.
+ * Use the following markup structure for accordion behavior:
+ *
+ * <div class="accordion-container">
+ *	<div class="accordion-section open">
+ *		<h3 class="accordion-section-title"></h3>
+ *		<div class="accordion-section-content">
+ *		</div>
+ *	</div>
+ *	<div class="accordion-section">
+ *		<h3 class="accordion-section-title"></h3>
+ *		<div class="accordion-section-content">
+ *		</div>
+ *	</div>
+ *	<div class="accordion-section">
+ *		<h3 class="accordion-section-title"></h3>
+ *		<div class="accordion-section-content">
+ *		</div>
+ *	</div>
+ * </div>
+ *
+ * Note that any appropriate tags may be used, as long as the above classes are present.
+ *
+ * @since 3.6.0
+ * @output wp-admin/js/accordion.js
+ */
+
+( function( $ ){
+
+	$( function () {
+
+		// Expand/Collapse accordion sections on click.
+		$( '.accordion-container' ).on( 'click keydown', '.accordion-section-title', function( e ) {
+			if ( e.type === 'keydown' && 13 !== e.which ) { // "Return" key.
+				return;
+			}
+
+			e.preventDefault(); // Keep this AFTER the key filter above.
+
+			accordionSwitch( $( this ) );
+		});
+
+	});
+
+	/**
+	 * Close the current accordion section and open a new one.
+	 *
+	 * @param {Object} el Title element of the accordion section to toggle.
+	 * @since 3.6.0
+	 */
+	function accordionSwitch ( el ) {
+		var section = el.closest( '.accordion-section' ),
+			sectionToggleControl = section.find( '[aria-expanded]' ).first(),
+			container = section.closest( '.accordion-container' ),
+			siblings = container.find( '.open' ),
+			siblingsToggleControl = siblings.find( '[aria-expanded]' ).first(),
+			content = section.find( '.accordion-section-content' );
+
+		// This section has no content and cannot be expanded.
+		if ( section.hasClass( 'cannot-expand' ) ) {
+			return;
+		}
+
+		// Add a class to the container to let us know something is happening inside.
+		// This helps in cases such as hiding a scrollbar while animations are executing.
+		container.addClass( 'opening' );
+
+		if ( section.hasClass( 'open' ) ) {
+			section.toggleClass( 'open' );
+			content.toggle( true ).slideToggle( 150 );
+		} else {
+			siblingsToggleControl.attr( 'aria-expanded', 'false' );
+			siblings.removeClass( 'open' );
+			siblings.find( '.accordion-section-content' ).show().slideUp( 150 );
+			content.toggle( false ).slideToggle( 150 );
+			section.toggleClass( 'open' );
+		}
+
+		// We have to wait for the animations to finish.
+		setTimeout(function(){
+		    container.removeClass( 'opening' );
+		}, 150);
+
+		// If there's an element with an aria-expanded attribute, assume it's a toggle control and toggle the aria-expanded value.
+		if ( sectionToggleControl ) {
+			sectionToggleControl.attr( 'aria-expanded', String( sectionToggleControl.attr( 'aria-expanded' ) === 'false' ) );
+		}
+	}
+
+})(jQuery);