table_altrow.module in Table Alternate Rows 7

Insert even and odd classes for tables via input filters to allow for proper zebra-style striping.

File

table_altrow.module

<?php

/**
 * @file
 * Insert even and odd classes for tables via input filters to allow for proper
 * 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;
      }
      $attributes = substr($matches[2][0], 0, strpos($matches[2][0], '>'));
      $found_class = preg_match('/\\bclass\\b="([\\- a-z0-9]*?)"/u', $attributes, $class_body);
      if ($count % 2 == 0) {
        $class = 'even';
      }
      else {
        $class = 'odd';
      }
      if ($found_class) {
        if (strstr($class_body[1], 'even') === FALSE || strstr($class_body[1], 'odd') === FALSE) {
          $class .= " {$class_body[1]}";
        }
        else {
          $class = $class_body[1];
        }
      }
      $new_tag = '<tr class="' . $class . '"' . $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.
 * Shamelessly stolen and modified from
 * http://ca.php.net/manual/en/function.str-replace.php#76180
 *
 * @param $needle
 *   The string to search for.
 * @param $replace
 *   The string to replace.
 * @param $haystack
 *   The text to search within.
 * @param $offset
 *   Optional parameter to indicate the character position to start the search
 *   and replace at.
 * @param integer $count
 *   Optional parameter to indicate the number of times to execute replacements.
 *
 * @return
 *   The modified string.
 */
function table_altrow_str_replace_count($needle, $replace, $haystack, $offset = NULL, $count = NULL) {
  if ($count == null) {
    $count = 0;
    $offset = strpos($haystack, $needle);
  }
  $rpl_count = 0;
  while ($offset !== false && $rpl_count < $count) {
    $haystack = substr_replace($haystack, $replace, $offset, strlen($needle));
    $offset += strlen($replace);
    $offset = strpos($haystack, $needle, $offset);
    $rpl_count++;
  }
  return $haystack;
}

Functions

Name	Description
table_altrow_filter_info	Implements hook_filter_info().
table_altrow_str_replace_count	Replace every instance of a string with a count parameter like PHP5. This can probably be removed with Drupal goes to PHP5 only. Shamelessly stolen and modified from http://ca.php.net/manual/en/function.str-replace.php#76180
_table_altrow_process	Filter process callback.
_table_altrow_tips	Filter tips callback.