display_text_formats.module

<?php
/**
 * @file
 * Module file for display_text_formats. 'administer filters'
 */

/**
 * Implements hook_field_formatter_info().
 */
function display_text_formats_field_formatter_info() {
  return array(
    'text_formats' => array(
      'label' => t('Custom Format'),
      'field types' => array('text', 'text_long', 'text_with_summary'),
      'settings' => array(
        'trim_length' => 600,
        'intelligent_trim' => 1,
        'text_format' => 'plain_text',
      ),
    ),
  );
}

/**
 * Implements hook_field_formatter_settings_form().
 */
function display_text_formats_field_formatter_settings_form($field, $instance, $view_mode, $form, &$form_state) {
  $display = $instance['display'][$view_mode];
  $settings = $display['settings'];

  $element = array();

  if ($display['type'] === 'text_formats') {
    $element['trim_length'] = array(
      '#title' => t('Trim length'),
      '#type' => 'textfield',
      '#size' => 10,
      '#default_value' => $settings['trim_length'],
      '#element_validate' => array('element_validate_integer_positive'),
      '#required' => TRUE,
    );

    // Checkbox whether or not to trim intelligently.
    $element['intelligent_trim'] = array(
      '#title' => t('Use intelligent trim'),
      '#type' => 'checkbox',
      '#default_value' => $settings['intelligent_trim'],
    );

    // Build the options array for text formats.
    $formats = filter_formats();
    $options = array();
    foreach ($formats as $key => $format) {
      $options[$key] = $format->name;
    }
    // Dropdown of text formats.
    $element['text_format'] = array(
      '#title' => t('Text format'),
      '#type' => 'select',
      '#empty_option' => t('Select a format'),
      '#default_value' => $settings['text_format'],
      '#options' => $options,
      '#required' => TRUE,
    );
  }

  return $element;
}

/**
 * Implements hook_field_formatter_settings_summary().
 */
function display_text_formats_field_formatter_settings_summary($field, $instance, $view_mode) {
  $display = $instance['display'][$view_mode];
  $settings = $display['settings'];

  $summary = '';

  if ($display['type'] === 'text_formats') {
    $summary = ($settings['intelligent_trim']) ? 'Intelligent' : 'Dumb';
    $summary .= ' ' . t('trim length') . ': ' . $settings['trim_length'] . ', ' .
      t('Text format') . ': ' . $settings['text_format'];
  }

  return $summary;
}

/**
 * Implements hook_field_formatter_view().
 */
function display_text_formats_field_formatter_view($entity_type, $entity, $field, $instance, $langcode, $items, $display) {
  $element = array();

  if ($display['type'] === 'text_formats') {
    foreach ($items as $delta => $item) {
      // Do what _text_sanitize() does, knowing it has a text format.
      $output = check_markup($item['value'], $display['settings']['text_format'], $langcode);

      if (($line_break = strpos($item['safe_value'], '<!--break-->')) !== FALSE) {
        $output = text_summary($output, $display['settings']['text_format'], $line_break);
      }
      // Use the text module's trimming function natively.
      elseif ($display['settings']['intelligent_trim']) {
        $output = text_summary($output, $display['settings']['text_format'], $display['settings']['trim_length']);
      }
      else {
        $output = drupal_substr($output, 0, $display['settings']['trim_length']);
      }

      $element[$delta] = array('#markup' => $output);
    }
  }

  return $element;
}