Issue #2631500 by jastraat: Drupal 8 Initial port

<?php

/**

 * @file

 * Contains \Drupal\table_altrow\Plugin\Filter\TableAltrow.

 */

namespace Drupal\table_altrow\Plugin\Filter;

use Drupal\filter\FilterProcessResult;

use Drupal\filter\Plugin\FilterBase;

/**

 * Insert even and odd classes for tables via input filters to allow for proper

 * zebra-style striping.

 *

 * @Filter(

 *   id = "table_altrow",

 *   title = @Translation("Add even and odd classes to table rows."),

 *   type = Drupal\filter\Plugin\FilterInterface::TYPE_MARKUP_LANGUAGE,

 * )

 */

class TableAltrow extends FilterBase {

  /**

   * {@inheritdoc}

   */

  public function process($text, $langcode) {

    // The actual filtering is performed here. The supplied text should be

    // returned, once any necessary substitutions have taken place.

    // First, we have to parse the variable.

    $matches = array();

    $offset = 0;

    // Find a tbody.

    while (preg_match('!(<tbody ?.*>)!i', $text, $matches, PREG_OFFSET_CAPTURE, $offset)) {

      $offset = $matches[0][1];

      $count = 1;

      // While the tbody is still open.

      while (preg_match('!(<tr( ?.*)>)|(</tbody>)!i', $text, $matches, PREG_OFFSET_CAPTURE, $offset)) {

        // +1 so we don't match the same string.

        $offset = $matches[0][1] + 1;

        // Don't process tr's until we find a tbody.

        if ($matches[0][0] == '</tbody>') {

          break;

        }

        // Don't replace existing classes. Perhaps this should append a class instead?

        if (!strstr($matches[2][0], 'class=')) {

          if (($count % 2) == 0) {

            $new_tag = '<tr class="even"' . $matches[2][0] . '>';

            $text = table_altrow_str_replace_count($matches[0][0], $new_tag, $text, $offset - 1, 1);

          }

          else {

            $new_tag = '<tr class="odd"' . $matches[2][0] . '>';

            $text = table_altrow_str_replace_count($matches[0][0], $new_tag, $text, $offset - 1, 1);

          }

        }

        $count++;

      }

    }

    return new FilterProcessResult($text);

  }

  /**

   * {@inheritdoc}

   */

  public function tips($long = FALSE) {

    if ($long) {

      return $this->t('Tables will be rendered with different styles for even and odd rows if supported.');

    }

  }

}

 No newline at end of file

name = Table Alternate Rows

description = Automatically adds even/odd classes to tables.

core = 7.x

files[] = table_altrow.module

project = "table_altrow"

name: 'Table Alternate Rows'

description: 'Automatically adds even/odd classes to tables.'

core: 8.x

type: module

package: User interface

 * zebra-style striping.

 */

/**

 * Implements hook_filter_info().

 */

function table_altrow_filter_info() {

  $filters = array();

  $filters['table_altrow'] = array(

    'title' => t('Add even and odd classes to table rows'),

    'process callback' => '_table_altrow_process',

    'tips callback' => 'table_altrow_tips',

  );

  return $filters;

}

/**

 * Filter process callback.

 */

function _table_altrow_process($text, $filter) {

  // The actual filtering is performed here. The supplied text should be

  // returned, once any necessary substitutions have taken place.

  // First, we have to parse the variable.

  $matches = array();

  $offset = 0;

  // Find a tbody.

  while (preg_match('!(<tbody ?.*>)!i', $text, $matches, PREG_OFFSET_CAPTURE, $offset)) {

    $offset = $matches[0][1];

    $count = 1;

    // While the tbody is still open.

    while (preg_match('!(<tr( ?.*)>)|(</tbody>)!i', $text, $matches, PREG_OFFSET_CAPTURE, $offset)) {

      // +1 so we don't match the same string.

      $offset = $matches[0][1] + 1;

      // Don't process tr's until we find a tbody.

      if ($matches[0][0] == '</tbody>') {

        break;

      }

      // Don't replace existing classes. Perhaps this should append a class instead?

      if (!strstr($matches[2][0], 'class=')) {

        if (($count % 2) == 0) {

          $new_tag = '<tr class="even"' . $matches[2][0] . '>';

          $text = table_altrow_str_replace_count($matches[0][0], $new_tag, $text, $offset - 1, 1);

        }

        else {

          $new_tag = '<tr class="odd"' . $matches[2][0] . '>';

          $text = table_altrow_str_replace_count($matches[0][0], $new_tag, $text, $offset - 1, 1);

        }

      }

      $count++;

    }

  }

  return $text;

}

/**

 * Filter tips callback.

 */

function _table_altrow_tips($filter, $format, $long = FALSE) {

  if ($long) {

    return t('Tables will be rendered with different styles for even and odd rows if supported.');

  }

}

/**

 * Replace every instance of a string with a count parameter like PHP5.

 * This can probably be removed with Drupal goes to PHP5 only.