1 filter.module _filter_html_tips($filter, $format, $long = FALSE)

Implements callback_filter_tips().

Provides help for the HTML filter.

See also

filter_filter_info()

Related topics

Standard filters Filters implemented by the Filter module.

File

core/modules/filter/filter.module, line 2078
Framework for handling the filtering of content.

Code

function _filter_html_tips($filter, $format, $long = FALSE) {
  global $base_url;

  if (!($allowed_html = $filter->settings['allowed_html'])) {
    return;
  }

  // Don't show allowed HTML tags if the user can't enter HTML.
  if ($format->editor == 'ckeditor') {
    return;
  }

  $output = t('Allowed HTML tags: @tags', array('@tags' => $allowed_html));
  if (!$long) {
    return $output;
  }

  $output = '<p>' . $output . '</p>';
  if (!$filter->settings['filter_html_help']) {
    return $output;
  }

  $output .= '<p>' . t('This site allows HTML content. While learning all of HTML may feel intimidating, learning how to use a very small number of the most basic HTML "tags" is very easy. This table provides examples for each tag that is enabled on this site.') . '</p>';
  $output .= '<p>' . t('For more information see W3C\'s <a href="@html-specifications">HTML Specifications</a> or use your favorite search engine to find other sites that explain HTML.', array('@html-specifications' => 'http://www.w3.org/TR/html/')) . '</p>';
  $tips = array(
    'a' => array(t('Anchors are used to make links to other pages.'), '<a href="' . $base_url . '">' . check_plain(config_get('system.core', 'site_name')) . '</a>'),
    'br' => array(t('By default line break tags are automatically added, so use this tag to add additional ones. Use of this tag is different because it is not used with an open/close pair like all the others. Use the extra " /" inside the tag to maintain XHTML 1.0 compatibility'), t('Text with <br />line break')),
    'p' => array(t('By default paragraph tags are automatically added, so use this tag to add additional ones.'), '<p>' . t('Paragraph one.') . '</p> <p>' . t('Paragraph two.') . '</p>'),
    'strong' => array(t('Strong', array(), array('context' => 'Font weight')), '<strong>' . t('Strong', array(), array('context' => 'Font weight')) . '</strong>'),
    'em' => array(t('Emphasized'), '<em>' . t('Emphasized') . '</em>'),
    'cite' => array(t('Cited'), '<cite>' . t('Cited') . '</cite>'),
    'code' => array(t('Coded text used to show programming source code'), '<code>' . t('Coded') . '</code>'),
    'b' => array(t('Bolded'), '<b>' . t('Bolded') . '</b>'),
    'u' => array(t('Underlined'), '<u>' . t('Underlined') . '</u>'),
    'i' => array(t('Italicized'), '<i>' . t('Italicized') . '</i>'),
    'sup' => array(t('Superscripted'), t('<sup>Super</sup>scripted')),
    'sub' => array(t('Subscripted'), t('<sub>Sub</sub>scripted')),
    'pre' => array(t('Preformatted'), '<pre>' . t('Preformatted') . '</pre>'),
    'abbr' => array(t('Abbreviation'), t('<abbr title="Abbreviation">Abbrev.</abbr>')),
    'acronym' => array(t('Acronym'), t('<acronym title="Three-Letter Acronym">TLA</acronym>')),
    'blockquote' => array(t('Block quoted'), '<blockquote>' . t('Block quoted') . '</blockquote>'),
    'q' => array(t('Quoted inline'), '<q>' . t('Quoted inline') . '</q>'),
    // Assumes and describes tr, td, th.
    'table' => array(t('Table'), '<table> <tr><th>' . t('Table header') . '</th></tr> <tr><td>' . t('Table cell') . '</td></tr> </table>'),
    'tr' => NULL, 'td' => NULL, 'th' => NULL,
    'del' => array(t('Deleted'), '<del>' . t('Deleted') . '</del>'),
    'ins' => array(t('Inserted'), '<ins>' . t('Inserted') . '</ins>'),
    // Assumes and describes li.
    'ol' => array(t('Ordered list - use the &lt;li&gt; to begin each list item'), '<ol> <li>' . t('First item') . '</li> <li>' . t('Second item') . '</li> </ol>'),
    'ul' => array(t('Unordered list - use the &lt;li&gt; to begin each list item'), '<ul> <li>' . t('First item') . '</li> <li>' . t('Second item') . '</li> </ul>'),
    'li' => NULL,
    // Assumes and describes dt and dd.
    'dl' => array(t('Definition lists are similar to other HTML lists. &lt;dl&gt; begins the definition list, &lt;dt&gt; begins the definition term and &lt;dd&gt; begins the definition description.'), '<dl> <dt>' . t('First term') . '</dt> <dd>' . t('First definition') . '</dd> <dt>' . t('Second term') . '</dt> <dd>' . t('Second definition') . '</dd> </dl>'),
    'dt' => NULL, 'dd' => NULL,
    'h1' => array(t('Heading'), '<h1>' . t('Title') . '</h1>'),
    'h2' => array(t('Heading'), '<h2>' . t('Subtitle') . '</h2>'),
    'h3' => array(t('Heading'), '<h3>' . t('Subtitle three') . '</h3>'),
    'h4' => array(t('Heading'), '<h4>' . t('Subtitle four') . '</h4>'),
    'h5' => array(t('Heading'), '<h5>' . t('Subtitle five') . '</h5>'),
    'h6' => array(t('Heading'), '<h6>' . t('Subtitle six') . '</h6>')
  );
  $header = array(t('Tag Description'), t('You Type'), t('You Get'));
  preg_match_all('/<([a-z0-9]+)[^a-z0-9]/i', $allowed_html, $out);
  foreach ($out[1] as $tag) {
    if (!empty($tips[$tag])) {
      $rows[] = array(
        array('data' => $tips[$tag][0], 'class' => array('description')),
        array('data' => '<code>' . check_plain($tips[$tag][1]) . '</code>', 'class' => array('type')),
        array('data' => $tips[$tag][1], 'class' => array('get'))
      );
    }
    else {
      $rows[] = array(
        array('data' => t('No help provided for tag %tag.', array('%tag' => $tag)), 'class' => array('description'), 'colspan' => 3),
      );
    }
  }
  $output .= theme('table', array('header' => $header, 'rows' => $rows));

  $output .= '<p>' . t('Most unusual characters can be directly entered without any problems.') . '</p>';
  $output .= '<p>' . t('If you do encounter problems, try using HTML character entities. A common example looks like &amp;amp; for an ampersand &amp; character. For a full list of entities see HTML\'s <a href="@html-entities">entities</a> page. Some of the available characters include:', array('@html-entities' => 'http://www.w3.org/TR/html4/sgml/entities.html')) . '</p>';

  $entities = array(
    array(t('Ampersand'), '&amp;'),
    array(t('Greater than'), '&gt;'),
    array(t('Less than'), '&lt;'),
    array(t('Quotation mark'), '&quot;'),
  );
  $header = array(t('Character Description'), t('You Type'), t('You Get'));
  unset($rows);
  foreach ($entities as $entity) {
    $rows[] = array(
      array('data' => $entity[0], 'class' => array('description')),
      array('data' => '<code>' . check_plain($entity[1]) . '</code>', 'class' => array('type')),
      array('data' => $entity[1], 'class' => array('get'))
    );
  }
  $output .= theme('table', array('header' => $header, 'rows' => $rows));
  return $output;
}