Convert spaces to tabs.

Update jQuery to add +/- signs to mobile menu. Fixes #33.

includes/functions/theme-functions.php

@@ -457,3 +457,29 @@ function trestle_image_has_size( $image_id, $image_size = null ) {
 	return false;
 
 }
+
+/**
+ * Check if post is, or is a child of, a target post.
+ *
+ * @since 1.0.0
+ *
+ * @param string $post_id   Post ID to check.
+ * @param string $target_id Target post ID to check against.
+ *
+ * @return true|false
+ */
+function trestle_is_current_or_descendant_post( $post_id = '', $target_id = '' ) {
+
+	// If the current post is the target post, return true.
+	if ( $post_id == $target_id ) {
+		return true;
+	}
+
+	// If the current post is a descendant of the target post.
+	if ( in_array( $target_id, get_post_ancestors( $post_id ) ) ) {
+		return true;
+	}
+
+	return false;
+
+}

includes/js/theme-jquery.js

@@ -107,8 +107,8 @@ jQuery( document ).ready( function( $ ) {
 	var openIcon = '-';
 
 	// Insert the icons into the nav where appropriate.
-	$( '.nav-primary' ).find( '.genesis-nav-menu .parent:not( .current-menu-item, .current_page_item, .current_page_parent, .current_page_ancestor) > a' ).after( '<a class="sub-icon" href="#">' + closedIcon + '</a>' );
-	$( '.nav-primary' ).find( '.genesis-nav-menu .parent.current-menu-item > a, .genesis-nav-menu .parent.current_page_item > a, .genesis-nav-menu .parent.current_page_parent > a, .genesis-nav-menu .parent.current_page_ancestor > a' ).after( '<a class="sub-icon" href="#">' + openIcon + '</a>' );
+	$( '.nav-primary' ).find( '.genesis-nav-menu .parent:not( [class*="current"] ) > a' ).after( '<a class="sub-icon" href="#">' + closedIcon + '</a>' );
+    $( '.nav-primary' ).find( '.genesis-nav-menu .parent[class*="current"] > a' ).after( '<a class="sub-icon" href="#">' + openIcon + '</a>' );
 
 	// Mobile navigation expand/contract functionality.
 	$( '.sub-icon' ).click( function( event ) {