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@ -4,7 +4,9 @@ namespace Drupal\bibcite_footnotes\Plugin\Filter;
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use Drupal\Component\Utility\Xss; |
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use Drupal\Core\Form\FormStateInterface; |
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use Drupal\footnotes\Plugin\Filter\FootnotesFilter; |
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use Drupal\filter\FilterProcessResult; |
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use Drupal\filter\Plugin\FilterBase; |
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/** |
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* Reference Footnotes filter. |
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@ -24,7 +26,7 @@ use Drupal\footnotes\Plugin\Filter\FootnotesFilter;
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* weight = 0 |
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* ) |
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*/ |
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class ReferenceFootnotesFilter extends FootnotesFilter { |
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class ReferenceFootnotesFilter extends FilterBase { |
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/** |
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* Object with configuration for reference footnotes. |
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@ -46,6 +48,7 @@ class ReferenceFootnotesFilter extends FootnotesFilter {
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public function __construct(array $configuration, $plugin_id, array $plugin_definition) { |
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parent::__construct($configuration, $plugin_id, $plugin_definition); |
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$this->renderer = \Drupal::service('renderer'); |
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$this->config = \Drupal::config('reference_footnotes.settings'); |
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$this->configEditable = \Drupal::configFactory() |
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->getEditable('reference_footnotes.settings'); |
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@ -310,4 +313,89 @@ class ReferenceFootnotesFilter extends FootnotesFilter {
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$prev_reference_id = $fn['reference']; |
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} |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function process($text, $langcode) { |
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// Supporting both [fn] and <fn> now. Thanks to fletchgqc |
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// http://drupal.org/node/268026. |
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// Convert all square brackets to angle brackets. This way all further code |
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// just manipulates angle brackets. (Angle brackets are preferred here for |
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// the simple reason that square brackets are more tedious to use in |
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// regexps). |
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if (is_array($text)) { |
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implode($text); |
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} |
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$text = preg_replace('|\[fn([^\]]*)\]|', '<fn$1>', $text); |
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$text = preg_replace('|\[/fn\]|', '</fn>', $text); |
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$text = preg_replace('|\[footnotes([^\]]*)\]|', '<footnotes$1>', $text); |
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// Check that there are an even number of open and closing tags. |
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// If there is one closing tag missing, append this to the end. |
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// If there is more disparity, throw a warning and continue. |
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// A closing tag may sometimes be missing when we are processing a teaser |
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// and it has been cut in the middle of the footnote. |
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// See http://drupal.org/node/253326 |
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$foo = []; |
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$open_tags = preg_match_all("|<fn([^>]*)>|", $text, $foo); |
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$close_tags = preg_match_all("|</fn>|", $text, $foo); |
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if ($open_tags == $close_tags + 1) { |
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$text = $text . '</fn>'; |
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} |
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elseif ($open_tags > $close_tags + 1) { |
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trigger_error($this->t("You have unclosed fn tags. This is invalid and will |
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produce unpredictable results.")); |
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} |
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// Before doing the replacement, the callback function needs to know which |
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// options to use. |
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$this->replaceCallback($this->settings, 'prepare'); |
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$pattern = '|<fn([^>]*)>(.*?)</fn>|s'; |
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$text = preg_replace_callback($pattern, [ |
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$this, |
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'replaceCallback', |
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], $text); |
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// Replace tag <footnotes> with the list of footnotes. |
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// If tag is not present, by default add the footnotes at the end. |
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// Thanks to acp on drupal.org for this idea. see |
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// http://drupal.org/node/87226. |
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$footer = $this->replaceCallback(NULL, 'output footer'); |
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$pattern = '|(<footnotes([^\]]*)>)|'; |
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if (preg_match($pattern, $text) > 0) { |
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$text = preg_replace($pattern, $footer, $text, 1); |
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} |
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elseif (!empty($footer)) { |
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$text .= "\n\n" . $footer; |
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} |
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$result = new FilterProcessResult($text); |
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$result->setAttachments([ |
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'library' => [ |
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'footnotes/footnotes', |
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], |
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]); |
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return $result; |
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} |
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/** |
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* Helper function to return a random text string. |
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* |
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* @return string |
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* Random (lowercase) alphanumeric string. |
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*/ |
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public function randstr() { |
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$chars = "abcdefghijklmnopqrstuwxyz1234567890"; |
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$str = ""; |
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// Seeding with srand() not necessary in modern PHP versions. |
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for ($i = 0; $i < 7; $i++) { |
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$n = rand(0, strlen($chars) - 1); |
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$str .= substr($chars, $n, 1); |
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} |
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return $str; |
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} |
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} |
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