Add support for Ibid.

bibcite_footnotes.module

@@ -10,8 +10,31 @@ use Drupal\Core\Routing\RouteMatchInterface;
 use Drupal\Core\Url;
 use Drupal\Core\Link;
 use Drupal\bibcite_footnotes\CitationTools;
+use Drupal\bibcite_footnotes\Plugin\Filter\ReferenceFootnotesFilter;
 
-/**_bibcite_foot
+/**
+ * Implements hook_theme().
+ */
+function bibcite_footnotes_theme() {
+  return [
+    'bibcite_footnote_link' => [
+      'render element' => 'fn',
+      'template' => 'bibcite-footnote-link',
+    ],
+    'bibcite_footnote_list' => [
+      'render element' => 'footnotes',
+      'path' => drupal_get_path('module', 'bibcite_footnotes') . '/templates',
+      'template' => 'bibcite-footnote-list',
+      'variables' => [
+        'notes' => [],
+        'note_type' => [],
+        'config' => [],
+      ],
+    ],
+  ];
+}
+
+/**
  * Implements hook_help().
  */
 function bibcite_footnotes_help($route_name, RouteMatchInterface $route_match) {
@@ -28,7 +51,7 @@ function bibcite_footnotes_help($route_name, RouteMatchInterface $route_match) {
 }
 
 /**
- * Implementation of hook_preprocess_footnote_list().
+ * Implementation of hook_preprocess_bibcite_footnote_list().
  *
  * Gatehrs all notes and prints out Notes and References as separate lists.
  *
@@ -37,29 +60,21 @@ function bibcite_footnotes_help($route_name, RouteMatchInterface $route_match) {
  * @throws \Drupal\Component\Plugin\Exception\InvalidPluginDefinitionException
  * @throws \Drupal\Component\Plugin\Exception\PluginNotFoundException
  */
-function bibcite_footnotes_preprocess_footnote_list(&$variables) {
-  $config = \Drupal::config('filter.format.rich_text_references');//filters.filter_reference_footnotes.settings');
-  $footnotes = $variables['footnotes'];
+function bibcite_footnotes_preprocess_bibcite_footnote_list(&$variables) {
+  $config = $variables['config'];
+  $footnotes = $variables['notes'];
 
   $notes = [
     '#theme' => 'item_list',
     '#list_type' => 'ul',
-    '#title' => $config->get('filters.filter_reference_footnotes.settings.notes_section_label'),
+    '#title' => $variables['note_type'] == ReferenceFootnotesFilter::ENDNOTE ? $config['notes_section_label'] : $config['references_section_label'],
     '#attributes' => ['class' => 'footnotes'],
     '#wrapper_attributes' => ['class' => 'container'],
   ];
 
-  $references= [
-    '#theme' => 'item_list',
-    '#list_type' => 'ul',
-    '#title' => $config->get('filters.filter_reference_footnotes.settings.references_section_label'),
-    '#attributes' => ['class' => 'footnotes'],
-    '#wrapper_attributes' => ['class' => 'container'],
-
-  ];
-  $references['#attached']['library'][] = 'bibcite_footnotes/reference_footnote';
-  $dont_show_backlink_text = $config->get('filters.filter_reference_footnotes.settings.reference_dont_show_backlink_text');
-  $sort_references_by = $config->get('filters.filter_reference_footnotes.settings.reference_sort_by');
+  $notes['#attached']['library'][] = 'bibcite_footnotes/reference_footnote';
+  $dont_show_backlink_text = $config['reference_dont_show_backlink_text'];
+  $sort_references_by = $config['reference_sort_by'];
   $citation_tools = new CitationTools();
   foreach ($footnotes as $fn) {
     $item = [
@@ -97,53 +112,66 @@ function bibcite_footnotes_preprocess_footnote_list(&$variables) {
       $override_page_in_citation = FALSE;
     }
 
-    if (!empty($fn['text'])) {
-      // Handle the case where an endnote contains text and a reference.
-      // It will appear in both lists. But the link text for the endnote should
-      // always be the title of the note. So make a copy of the biuld arrray
-      // and change the link text.
-      $note_build = $build + ['#type' => 'markup', '#markup' => ' <span class="endnote-text">' . $fn['text'] . '</span>'];
-      $note_build['footnote-link'] = Link::fromTextAndUrl($fn['value'], $url)->toRenderable();
-      if (!empty($reference_entity_id)) {
-        $citation_build = $citation_tools->getRenderableReference($reference_entity_id);
-        $note_build[] = $citation_build;
-      }
-      $note_item = [] + $item;
-      $note_item['#markup'] = render($note_build);
-
-      $notes['#items'][] = $note_item;
+    if ($fn['ibid']) {
+      $build['#type'] = 'markup';
+      $build['#markup'] = ' <span class="endnote-text"><span class="ibid">'
+        . t('Ibid') . '.</span>'
+        . (!empty($fn['page']) ? ', ' . $fn['page'] : '')
+        . '</span>';
+    }
+    else if (!empty($fn['text']) && $variables['note_type'] == ReferenceFootnotesFilter::ENDNOTE) {
+      $build['#type'] = 'markup';
+      $build['#markup'] = ' <span class="endnote-text">' . $fn['text'] . '</span>';
+      $build['footnote-link'] = Link::fromTextAndUrl($fn['value'], $url)->toRenderable();
     }
 
     if (!empty($reference_entity_id)) {
-      $citation_build = $citation_tools->getRenderableReference($reference_entity_id);
-      if ($override_page_in_citation) {
-        $citation_build['#data']['page'] = $override_page_in_citation;
+      if (!$fn['ibid']) {
+        $citation_build = $citation_tools->getRenderableReference($reference_entity_id);
+        if ($override_page_in_citation) {
+          $citation_build['#data']['page'] = $override_page_in_citation;
+        }
+
+        $build[] = $citation_build;
       }
-      $build[] = $citation_build;
+
       $render = render($build);
-      $item['#markup'] = $render;
       $item['sort'] = trim(strip_tags(render($citation_build)));
-      $references['#items'][] = $item;
-
     }
 
+    $item['#markup'] = $render;
+    $notes['#items'][] = $item;
+    $reference_entity_id = FALSE;
+    $render = FALSE;
   }
 
-  $variables['notes'] = $notes;
-
-  if ($sort_references_by == 'alphabetical') {
-    usort($references['#items'], '_bibcite_footnotes_reference_array_cmp');
+  if ($sort_references_by == 'alphabetical' && $variables['note_type'] == ReferenceFootnotesFilter::REFERENCE) {
+    usort($notes['#items'], '_bibcite_footnotes_reference_array_cmp');
   }
-  $variables['references'] = $references;
+  $variables['notes'] = $notes;
 }
 
+/**
+ * Comparator function for sorting lists of references.
+ *
+ * @param $a First item to compare
+ * @param $b Second item to compare
+ * @return int Result of the comparison.
+ */
 function _bibcite_footnotes_reference_array_cmp($a, $b) {
   $a1 = (!empty($a['sort']) ? strtolower($a['sort']) : '');
   $b1 = (!empty($b['sort']) ? strtolower($b['sort']) : '');
   return strcmp($a1, $b1);
 }
 
-function bibcite_footnotes_preprocess_footnote_link(&$variables) {
+/**
+ * Implementation of hook_preprocess_bibcite_footnote_link().
+ *
+ * Construct a link inside a block of text so that it points to the reference list.
+ *
+ * @param $variables
+ */
+function bibcite_footnotes_preprocess_bibcite_footnote_link(&$variables) {
 //  $variables['fn']['fn']['#type'] = 'markeup';
 //  $variables['fn']['fn']['#markup'] = '<h2>Hello!</h2>';
   $fn = $variables['fn']['fn'];
@@ -169,17 +197,3 @@ function bibcite_footnotes_preprocess_footnote_link(&$variables) {
   $link = Link::fromTextAndUrl($fn['value'], $url)->toRenderable();
   $variables['fn']['fn'][] = $link;
 }
-
-function bibcite_footnotes_theme_registry_alter(&$theme_registry) {
-  unset($theme_registry['footnote_list']['function']);
-  $theme_registry['footnote_list']['path'] = drupal_get_path('module', 'bibcite_footnotes') . '/templates';
-  $theme_registry['footnote_list']['template'] = 'footnote-list';
-  $theme_registry['footnote_list']['variables']['notes'] = [];
-  $theme_registry['footnote_list']['variables']['references'] = [];
-  $theme_registry['footnote_list']['variables']['footnotes'] = [];
-
-  unset($theme_registry['footnote_link']['function']);
-  $theme_registry['footnote_link']['path'] = drupal_get_path('module', 'bibcite_footnotes') . '/templates';
-  $theme_registry['footnote_link']['template'] = 'footnote-link';
-}
-

src/Plugin/Filter/ReferenceFootnotesFilter.php

@@ -7,7 +7,7 @@ use Drupal\Core\Form\FormStateInterface;
 use Drupal\footnotes\Plugin\Filter\FootnotesFilter;
 
 /**
- * Provides a base filter for Reference Footnotes filter.
+ * Reference Footnotes filter.
  *
  * @Filter(
  *   id = "filter_reference_footnotes",
@@ -17,7 +17,8 @@ use Drupal\footnotes\Plugin\Filter\FootnotesFilter;
  *   type = \Drupal\filter\Plugin\FilterInterface::TYPE_TRANSFORM_IRREVERSIBLE,
  *   cache = FALSE,
  *   settings = {
- *     "footnotes_collapse" = FALSE,
+ *     "footnotes_footnotefootnote_linkcollapse" = FALSE,
+ *     "footnotes_ibid" = FALSE,
  *     "notes_section_label" = "Notes",
  *     "references_section_label" = "References"
  *   },
@@ -25,6 +26,8 @@ use Drupal\footnotes\Plugin\Filter\FootnotesFilter;
  * )
  */
 class ReferenceFootnotesFilter extends FootnotesFilter {
+  const ENDNOTE = 0;
+  const REFERENCE = 1;
 
   /**
    * Object with configuration for reference footnotes.
@@ -66,10 +69,15 @@ class ReferenceFootnotesFilter extends FootnotesFilter {
   public function settingsForm(array $form, FormStateInterface $form_state) {
     $settings['footnotes_collapse'] = [
       '#type' => 'checkbox',
-      '#title' => t('Collapse reference footnotes with identical content'),
+      '#title' => $this->t('Collapse reference footnotes with identical content'),
       '#default_value' => $this->settings['footnotes_collapse'],
       '#description' => t('If two reference footnotes have the exact same content, they will be collapsed into one as if using the same value="" attribute.'),
     ];
+    $settings['footnotes_ibid'] = [
+      '#type' => 'checkbox',
+      '#title' => $this->t('Display subsequent instances of multiple references with \'Ibid.\''),
+      '#default_value' => $this->settings['footnotes_ibid'],
+    ];
     $settings['notes_section_label'] = [
       '#type' => 'textfield',
       '#title' => t('Notes section label'),
@@ -133,21 +141,33 @@ class ReferenceFootnotesFilter extends FootnotesFilter {
     }
 
     if ($op == 'output footer') {
+
+
       if (count($store_matches) > 0) {
+        // Separate out endontes and reference notes.
+        $notes = $this->extractNotesByType(self::ENDNOTE, $store_matches);
+        $references = $this->extractNotesByType(self::REFERENCE, $store_matches);
+
+        if ($this->settings['footnotes_ibid']) {
+          $this->ibidemify($references);
+        }
         // Only if there are stored fn matches, pass the array of fns to be
-        // themed as a list Drupal 7 requires we use "render element" which
-        // just introduces a wrapper around the old array.
-        // @FIXME
-        // theme() has been renamed to _theme() and should NEVER be called
-        // directly. Calling _theme() directly can alter the expected output and
-        // potentially introduce  security issues
-        // (see https://www.drupal.org/node/2195739). You should use renderable
-        // arrays instead. @see https://www.drupal.org/node/2195739
+        // themed as a list
         $markup = [
-          '#theme' => 'footnote_list',
-          '#footnotes' => $store_matches,
+          '#theme' => 'bibcite_footnote_list',
+          '#notes' => $notes,
+          '#note_type' => self::ENDNOTE,
+          '#config' => $this->settings,
         ];
         $str = \Drupal::service('renderer')->render($markup, FALSE);
+
+        $markup = [
+          '#theme' => 'bibcite_footnote_list',
+          '#notes' => $references,
+          '#note_type' => self::REFERENCE,
+          '#config' => $this->settings,
+        ];
+        $str .= \Drupal::service('renderer')->render($markup, FALSE);
       }
       // Reset the static variables so they can be used again next time.
       $n = 0;
@@ -246,30 +266,18 @@ class ReferenceFootnotesFilter extends FootnotesFilter {
     // Drupal 7 requires we use "render element" which just introduces a wrapper
     // around the old array.
     $fn = [
-      '#theme' => 'footnote_link',
+      '#theme' => 'bibcite_footnote_link',
       'fn' => $fn,
     ];
+
+
     $result = \Drupal::service('renderer')->render($fn, FALSE);
 
     return $result;
   }
 
   /**
-   * Search the $store_matches array for footnote text that matches.
-   *
-   * Note: This does a linear search on the $store_matches array. For a large
-   * list of footnotes it would be more efficient to maintain a separate array
-   * with the footnote content as key, in order to do a hash lookup at this
-   * stage. Since you typically only have a handful of footnotes, this simple
-   * search is assumed to be more efficient, but was not tested.
-   *
-   * @param string $text
-   *   The footnote text.
-   * @param array $store_matches
-   *   The matches array.
-   *
-   * @return string|false
-   *   The value of the existing footnote, FALSE otherwise.
+   * @inheritdoc
    */
   private function findFootnote($text, &$store_matches) {
     if (!empty($store_matches)) {
@@ -304,4 +312,42 @@ class ReferenceFootnotesFilter extends FootnotesFilter {
     }
     return $value;
   }
+
+  /**
+   * Determine references that are the same as one above it
+   * to be replaced with the string 'Ibid'.
+   *
+   * @param array $footnotes
+   */
+  protected function ibidemify(&$footnotes) {
+    $prev_reference_id = FALSE;
+    foreach ($footnotes as $index => $fn) {
+      if ($prev_reference_id) {
+        if ($fn['reference'] == $prev_reference_id) {
+          $footnotes[$index]['ibid'] = TRUE;
+          continue;
+        }
+      }
+      $prev_reference_id = $fn['reference'];
+    }
+  }
+
+  protected function extractNotesByType($type, $footnotes) {
+    $notes = [];
+    foreach ($footnotes as $fn) {
+      switch ($type) {
+        case self::ENDNOTE:
+          if (!empty($fn['text'])) {
+            $notes[] = $fn;
+          }
+          break;
+        case self::REFERENCE:
+          if (!empty($fn['reference'])) {
+            $notes[] = $fn;
+          }
+          break;
+      }
+    }
+    return $notes;
+  }
 }