Separates counter from display function for footnote numbers.

src/shortcode.php

@@ -12,51 +12,69 @@
 defined( 'ABSPATH' ) or exit;
 
 /**
- * Replace content between the shortcode and count number of footnotes.
+ * Return markup for the `sup`-element.
  *
- * @param array  $attributes The attributes.
- * @param string $content    The content of each shortcode.
+ * @since 20210922.1
+ *
+ * @param int    $number The number that replaces the shortcode content.
+ * @param string $content The content between shortcode-tags that can be places in a title-attribute.
  * @return string
  */
-function replace_content_with_sup( $attributes, $content ) {
-
-	// Count number of notes in each post.
-	global $counter;
-
-	$attributes  = '';
-	$note_number = intval( 1 );
+function display( $number, $content ) {
+	$link_title  = '';
+	$note_link   = \kebbet\shortcode\footnotes\helpers\link_id( $number, true, true );
 	$sup_class   = apply_filters( 'kebbet_shortcode_footnote_note_class', 'footnotes-footnote' );
 	$sup_id      = '';
-	$target      = \kebbet\shortcode\footnotes\helpers\get_post_scope_id();
-	$first_item  = ! isset( $counter[$target] );
-
-	// Which footnote is this?
-	if ( ! $first_item ) {
-		$find_max    = max( $counter[$target]['ref'] );
-		$note_number = $find_max + intval( 1 );
-	}
-
-	$counter[$target]['ref'][] = $note_number;
-	$note_link                 = \kebbet\shortcode\footnotes\helpers\link_id( $note_number, true, true );
 
 	// Add optional title attribute to link element.
 	if ( true === \kebbet\shortcode\footnotes\settings\title_attributes() ) {
 		$content    = do_shortcode( $content ); // Render out any shortcode within the contents.
 		$content    = \kebbet\shortcode\footnotes\helpers\strip_paragraph( $content );
 		$content    = str_replace( '"', '"', strip_tags( $content ) );
-		$attributes = ' title="' . esc_attr( $content ) . '"';
+		$link_title = ' title="' . esc_attr( $content ) . '"';
 	}
 
 	// Add back links if enabled.
 	if ( true === \kebbet\shortcode\footnotes\settings\back_link() ) {
-		$source_id = \kebbet\shortcode\footnotes\helpers\link_id( $note_number, false, false );
+		$source_id = \kebbet\shortcode\footnotes\helpers\link_id( $number, false, false );
 		$sup_id    = ' id="' . esc_attr( $source_id ) . '"';
 	}
 
 	// Build the `sup`-element.
 	$sup_content  = '<sup' . $sup_id . ' class="' . esc_attr( $sup_class ) . '">';
-	$sup_content .= '<a href="' . esc_url( $note_link ) . '"' . $attributes . '>' . esc_attr( $note_number ) . '</a>';
+	$sup_content .= '<a href="' . esc_url( $note_link ) . '"' . $link_title . '>' . esc_attr( $number ) . '</a>';
 	$sup_content .= '</sup>';
 
 	return $sup_content;
 }
+
+/**
+ * Count number of footnotes and replace content between the shortcode tags.
+ *
+ * @param array  $attributes The attributes.
+ * @param string $content    The content of each shortcode.
+ * @return string
+ */
+function replace_content_with_sup( $attributes, $content ) {
+
+	// Count number of notes in each post.
+	global $counter;
+
+	$note_number = intval( 1 );
+	$target      = \kebbet\shortcode\footnotes\helpers\get_post_scope_id();
+	$first_item  = ! isset( $counter[$target] );
+
+	// Which footnote is this?
+	if ( ! $first_item ) {
+		$find_max    = max( $counter[$target] );
+		$note_number = $find_max + intval( 1 );
+	}
+
+	// Update counter.
+	$counter[$target][] = $note_number;
+
+	// Markup for the sup-element.
+	$sup_content = display( $note_number, $content );
+
+	return $sup_content;
+}