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Edit File: colorbox.module

<?php

/**
 * @file
 * A light-weight, customizable lightbox plugin for jQuery 1.3.
 */

/**
 * The minimum required version of the Colorbox plugin.
 */
define('COLORBOX_MIN_PLUGIN_VERSION', '1.6.1');

/**
 * The minimum required version of the DOMPurify plugin, if installed.
 */
define('COLORBOX_DOMPURIFY_MIN_PLUGIN_VERSION', '2.3.6');

/**
 * Implements hook_theme().
 */
function colorbox_theme() {
  return array(
    'colorbox_imagefield' => array(
      'variables' => array(
        'image' => array(),
        'path' => NULL,
        'title' => NULL,
        'gid' => NULL,
      ),
      'file' => 'colorbox.theme.inc',
    ),
    'colorbox_insert_image' => array(
      'variables' => array(
        'item' => NULL,
        'widget' => NULL,
      ),
      'template' => 'colorbox-insert-image',
      'pattern' => 'colorbox_insert_image__[a-z0-9_]+',
      'file' => 'colorbox.theme.inc',
    ),
    'colorbox_image_formatter' => array(
      'variables' => array(
        'item' => NULL,
        'entity_type' => NULL,
        'entity' => NULL,
        // Left for legacy support.
        'node' => NULL,
        'field' => array(),
        'display_settings' => array(),
        'delta' => NULL,
      ),
      'file' => 'colorbox.theme.inc',
    ),
  );
}

/**
 * Implements hook_init().
 */
function colorbox_init() {
  // Do not load colorbox during the Drupal installation process, e.g. if part
  // of installation profiles. Only add the JavaScript and CSS on specified
  // paths.
  if (!drupal_installation_attempted() && _colorbox_active()) {
    _colorbox_doheader();
  }
}

/**
 * Implements hook_views_api().
 */
function colorbox_views_api() {
  return array(
    'api' => 2,
    'path' => drupal_get_path('module', 'colorbox') . '/views',
  );
}

/**
 * Implements hook_libraries_info().
 */
function colorbox_libraries_info() {
  $libraries['colorbox'] = array(
    'name' => 'Colorbox plugin',
    'vendor url' => 'http://www.jacklmoore.com/colorbox',
    'download url' => 'https://github.com/jackmoore/colorbox/archive/1.x.zip',
    'version arguments' => array(
      'file' => 'jquery.colorbox-min.js',
      'pattern' => '@(?i:Colorbox)\sv?([0-9\.a-z]+)@',
      'lines' => 5,
    ),
    'files' => array(
      'js' => array(
        'jquery.colorbox-min.js',
      ),
    ),
    'variants' => array(
      'minified' => array(
        'files' => array(
          'js' => array(
            'jquery.colorbox-min.js',
          ),
        ),
      ),
      'source' => array(
        'files' => array(
          'js' => array(
            'jquery.colorbox.js',
          ),
        ),
      ),
    ),
  );
  $libraries['DOMPurify'] = array(
    'name' => 'DOMPurify',
    'vendor url' => 'https://github.com/cure53/DOMPurify',
    'download url' => 'https://raw.githubusercontent.com/cure53/DOMPurify/3.x/dist/purify.min.js',
    'files' => array(
      'js' => array(
        'purify.min.js',
      ),
    ),
    'version arguments' => array(
      'file' => 'purify.min.js',
      'pattern' => '@(?i:DOMPurify)\s+([0-9a-zA-Z\.-]+)@',
      'lines' => 5,
    ),
    'variants' => array(
      'minified' => array(
        'files' => array(
          'js' => array(
            'purify.min.js',
          ),
        ),
      ),
      'source' => array(
        'files' => array(
          'js' => array(
            'purify.js',
          ),
        ),
      ),
    ),
  );

return $libraries;
}

/**
 * Implements hook_menu().
 */
function colorbox_menu() {
  $items = array();

$items['admin/config/media/colorbox'] = array(
    'title' => 'Colorbox',
    'description' => 'Adjust Colorbox settings.',
    'file' => 'colorbox.admin.inc',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('colorbox_admin_settings'),
    'access arguments' => array('administer site configuration'),
  );

return $items;
}

/**
 * Check if Colorbox should be active for the current URL.
 *
 * @return bool
 *   TRUE if Colorbox should be active for the current page.
 */
function _colorbox_active() {
  // Make it possible deactivate Colorbox with
  // parameter ?colorbox=no in the url.
  if (isset($_GET['colorbox']) && $_GET['colorbox'] == 'no') {
    return FALSE;
  }

// Code from the block_list function in block.module.
  $path = drupal_get_path_alias($_GET['q']);
  $colorbox_pages = variable_get('colorbox_pages', "admin*\nimagebrowser*\nimg_assist*\nimce*\nnode/add/*\nnode/*/edit\nprint/*\nprintpdf/*\nsystem/ajax\nsystem/ajax/*");
  // Compare with the internal and path alias (if any).
  $page_match = drupal_match_path($path, $colorbox_pages);
  if ($path != $_GET['q']) {
    $page_match = $page_match || drupal_match_path($_GET['q'], $colorbox_pages);
  }
  $page_match = variable_get('colorbox_visibility', 0) == 0 ? !$page_match : $page_match;

// Allow other modules to change the state of colorbox for the current URL.
  drupal_alter('colorbox_active', $page_match);

return $page_match;
}

/**
 * Loads the various js and css files.
 *
 * @param boolean $on_demand
 *   Force the Colorbox code to be loaded on the current page, unless they
 *   have already been loaded.
 */
function _colorbox_doheader($on_demand = FALSE) {
  static $already_added = FALSE;
  if (!$on_demand && !_colorbox_active()) {
    // Don't add the JavaScript and CSS multiple times.
    return;
  }

// Insert options and translated strings as JavaScript settings.
  if (variable_get('colorbox_custom_settings_activate', 0)) {
    $js_settings = array(
      'transition' => variable_get('colorbox_transition_type', 'elastic'),
      'speed' => variable_get('colorbox_transition_speed', 350),
      'opacity' => variable_get('colorbox_opacity', '0.85'),
      'slideshow' => variable_get('colorbox_slideshow', 0) ? TRUE : FALSE,
      'slideshowAuto' => variable_get('colorbox_slideshowauto', 1) ? TRUE : FALSE,
      'slideshowSpeed' => variable_get('colorbox_slideshowspeed', 2500),
      'slideshowStart' => variable_get('colorbox_text_start', 'start slideshow'),
      'slideshowStop' => variable_get('colorbox_text_stop', 'stop slideshow'),
      'current' => strip_tags(variable_get('colorbox_text_current', '{current} of {total}')),
      'previous' => strip_tags(variable_get('colorbox_text_previous', '« Prev')),
      'next' => strip_tags(variable_get('colorbox_text_next', 'Next »')),
      'close' => strip_tags(variable_get('colorbox_text_close', 'Close')),
      'overlayClose' => variable_get('colorbox_overlayclose', 1) ? TRUE : FALSE,
      'returnFocus' => variable_get('colorbox_returnfocus', 1) ? TRUE : FALSE,
      'maxWidth' => variable_get('colorbox_maxwidth', '98%'),
      'maxHeight' => variable_get('colorbox_maxheight', '98%'),
      'initialWidth' => variable_get('colorbox_initialwidth', '300'),
      'initialHeight' => variable_get('colorbox_initialheight', '250'),
      'fixed' => variable_get('colorbox_fixed', 1) ? TRUE : FALSE,
      'scrolling' => variable_get('colorbox_scrolling', 1) ? TRUE : FALSE,
      'mobiledetect' => variable_get('colorbox_mobile_detect', 1) ? TRUE : FALSE,
      'mobiledevicewidth' => variable_get('colorbox_mobile_device_width', '480px'),
    );
  }
  else {
    $js_settings = array(
      'opacity' => '0.85',
      'current' => t('{current} of {total}'),
      'previous' => t('« Prev'),
      'next' => t('Next »'),
      'close' => t('Close'),
      'maxWidth' => '98%',
      'maxHeight' => '98%',
      'fixed' => TRUE,
      'mobiledetect' => variable_get('colorbox_mobile_detect', 1) ? TRUE : FALSE,
      'mobiledevicewidth' => variable_get('colorbox_mobile_device_width', '480px'),
    );
  }

// Determine URL path to public files.
  $js_settings['file_public_path'] = base_path() .
    variable_get('file_public_path', conf_path() . '/files');

$js_settings['specificPagesDefaultValue'] = "admin*\nimagebrowser*\nimg_assist*\nimce*\nnode/add/*\nnode/*/edit\nprint/*\nprintpdf/*\nsystem/ajax\nsystem/ajax/*";

$path = drupal_get_path('module', 'colorbox');
  $style = variable_get('colorbox_style', 'default');

// Give other modules the possibility to override Colorbox settings and style.
  $data = &$js_settings;
  drupal_alter('colorbox_settings', $data, $style);

drupal_add_js(array('colorbox' => $js_settings), array('type' => 'setting', 'scope' => JS_DEFAULT));

// Add and initialize the Colorbox and DOMPurify libraries.
  $variant = variable_get('colorbox_compression_type', 'minified');
  if (module_exists('libraries')) {
    $colorbox_library = libraries_detect('colorbox');
    $dompurify_library = libraries_detect('DOMPurify');
    if ($colorbox_library['installed'] &&
      version_compare($colorbox_library['version'], COLORBOX_MIN_PLUGIN_VERSION, '>=')) {
      libraries_load('colorbox', $variant);
    }
    if ($dompurify_library['installed'] &&
      version_compare($dompurify_library['version'], COLORBOX_DOMPURIFY_MIN_PLUGIN_VERSION, '>=')) {
      libraries_load('DOMPurify', 'minified');
    }
  }
  drupal_add_js($path . '/js/colorbox.js');

// Add JS and CSS based on selected style.
  switch ($style) {
    case 'none':
      break;

case 'default':
    case 'plain':
    case 'stockholmsyndrome':
      drupal_add_css($path . '/styles/' . $style . '/colorbox_style.css');
      drupal_add_js($path . '/styles/' . $style . '/colorbox_style.js');
      break;

default:
      drupal_add_css($style . '/colorbox.css');
  }

if (variable_get('colorbox_load', 0)) {
    drupal_add_js($path . '/js/colorbox_load.js');
  }

if (variable_get('colorbox_inline', 0)) {
    drupal_add_js($path . '/js/colorbox_inline.js');
  }

$already_added = TRUE;
}

/**
 * Implements hook_field_formatter_info().
 */
function colorbox_field_formatter_info() {
  return array(
    'colorbox' => array(
      'label' => t('Colorbox'),
      'field types' => array('image'),
      'settings' => array(
        'colorbox_node_style' => '',
        'colorbox_node_style_first' => '',
        'colorbox_image_style' => '',
        'colorbox_gallery' => 'post',
        'colorbox_gallery_custom' => '',
        'colorbox_caption' => 'auto',
        'colorbox_caption_custom' => '',
        'colorbox_multivalue_index' => NULL,
      ),
    ),
  );
}

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

$image_styles = image_style_options(FALSE);
  $image_styles_hide = $image_styles;
  $image_styles_hide['hide'] = t('Hide (do not display image)');
  $element['colorbox_node_style'] = array(
    '#title' => t('Content image style'),
    '#type' => 'select',
    '#default_value' => $settings['colorbox_node_style'],
    '#empty_option' => t('None (original image)'),
    '#options' => $image_styles_hide,
    '#description' => t('Image style to use in the content.'),
  );
  $element['colorbox_node_style_first'] = array(
    '#title' => t('Content image style for first image'),
    '#type' => 'select',
    '#default_value' => $settings['colorbox_node_style_first'],
    '#empty_option' => t('No special style.'),
    '#options' => $image_styles,
    '#description' => t('Image style to use in the content for the first image.'),
  );
  $element['colorbox_image_style'] = array(
    '#title' => t('Colorbox image style'),
    '#type' => 'select',
    '#default_value' => $settings['colorbox_image_style'],
    '#empty_option' => t('None (original image)'),
    '#options' => $image_styles,
    '#description' => t('Image style to use in the Colorbox.'),
  );

$gallery = array(
    'post' => t('Per post gallery'),
    'page' => t('Per page gallery'),
    'field_post' => t('Per field in post gallery'),
    'field_page' => t('Per field in page gallery'),
    'custom' => t('Custom'),
    'none' => t('No gallery'),
  );
  $element['colorbox_gallery'] = array(
    '#title' => t('Gallery (image grouping)'),
    '#type' => 'select',
    '#default_value' => $settings['colorbox_gallery'],
    '#options' => $gallery,
    '#description' => t('How Colorbox should group the image galleries.'),
  );
  $element['colorbox_gallery_custom'] = array(
    '#title' => t('Custom gallery'),
    '#type' => 'textfield',
    '#maxlength' => 32,
    '#default_value' => $settings['colorbox_gallery_custom'],
    '#description' => t('All images on a page with the same gallery value (rel attribute) will be grouped together. It must only contain lowercase letters, numbers, hyphen and underscores.'),
    '#element_validate' => array('colorbox_gallery_custom_validate'),
    '#required' => FALSE,
    '#states' => array(
      'visible' => array(
        ':input[name$="[settings_edit_form][settings][colorbox_gallery]"]' => array('value' => 'custom'),
      ),
    ),
  );

$caption = array(
    'auto' => t('Automatic'),
    'title' => t('Title text'),
    'alt' => t('Alt text'),
    'node_title' => t('Content title'),
    'custom' => t('Custom (with tokens)'),
    'none' => t('None'),
  );
  $element['colorbox_caption'] = array(
    '#title' => t('Caption'),
    '#type' => 'select',
    '#default_value' => $settings['colorbox_caption'],
    '#options' => $caption,
    '#description' => t('Automatic will use the first non-empty value of the title, the alt text and the content title.'),
  );
  $element['colorbox_caption_custom'] = array(
    '#title' => t('Custom caption'),
    '#type' => 'textfield',
    '#default_value' => $settings['colorbox_caption_custom'],
    '#states' => array(
      'visible' => array(
        ':input[name$="[settings_edit_form][settings][colorbox_caption]"]' => array('value' => 'custom'),
      ),
    ),
  );
  // Allow users to hide or set a custom recursion limit.
  // The module token_tweaks sets a global recursion limit that can not be
  // bypassed.
  if (module_exists('token') && $recursion_limit = min(variable_get('token_tree_recursion_limit', 3), variable_get('colorbox_token_recursion_limit', 3))) {
    // File entities do not have $field, only $instance.
    if (!empty($field)) {
      $token_types = array_merge(array_keys($field['bundles']), array('file'));
    }
    else {
      $token_types = array($instance['entity_type'], 'file');
    }
    $element['colorbox_token'] = array(
      '#type' => 'fieldset',
      '#title' => t('Replacement patterns'),
      '#theme' => 'token_tree',
      '#token_types' => $token_types,
      '#recursion_limit' => $recursion_limit,
      '#dialog' => TRUE,
      '#states' => array(
        'visible' => array(
          ':input[name$="[settings_edit_form][settings][colorbox_caption]"]' => array('value' => 'custom'),
        ),
      ),
    );
  }
  else {
    $element['colorbox_token'] = array(
      '#type' => 'fieldset',
      '#title' => t('Replacement patterns'),
      '#description' => '<strong class="error">' . t('For token support the <a href="@token_url">token module</a> must be installed.', array('@token_url' => 'http://drupal.org/project/token')) . '</strong>',
      '#states' => array(
        'visible' => array(
          ':input[name$="[settings_edit_form][settings][colorbox_caption]"]' => array('value' => 'custom'),
        ),
      ),
    );
  }

return $element;
}

/**
 * Validate function for colorbox_gallery_custom.
 */
function colorbox_gallery_custom_validate($element, &$form_state) {
  if (!empty($element['#value']) && !preg_match('!^[a-z0-9_-]+$!', $element['#value'])) {
    form_error($element, t('%name must only contain lowercase letters, numbers, hyphen and underscores.', array('%name' => $element['#title'])));
  }
}

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

$summary = array();

$image_styles = image_style_options(FALSE);
  // Unset possible 'No defined styles' option.
  unset($image_styles['']);
  // Styles could be lost because of enabled/disabled modules that defines
  // their styles in code.
  if (isset($image_styles[$settings['colorbox_node_style']])) {
    $summary[] = t('Content image style: @style', array('@style' => $image_styles[$settings['colorbox_node_style']]));
  }
  elseif ($settings['colorbox_node_style'] == 'hide') {
    $summary[] = t('Content image style: Hide');
  }
  else {
    $summary[] = t('Content image style: Original image');
  }

if (isset($image_styles[$settings['colorbox_node_style_first']])) {
    $summary[] = t('Content image style of first image: @style', array('@style' => $image_styles[$settings['colorbox_node_style_first']]));
  }

if (isset($image_styles[$settings['colorbox_image_style']])) {
    $summary[] = t('Colorbox image style: @style', array('@style' => $image_styles[$settings['colorbox_image_style']]));
  }
  else {
    $summary[] = t('Colorbox image style: Original image');
  }

$caption = array(
    'auto' => t('Automatic'),
    'title' => t('Title text'),
    'alt' => t('Alt text'),
    'node_title' => t('Content title'),
    'custom' => t('Custom (with tokens)'),
    'none' => t('None'),
  );
  if (isset($settings['colorbox_caption'])) {
    $summary[] = t('Colorbox caption: @type', array('@type' => $caption[$settings['colorbox_caption']]));
  }

return implode('<br />', $summary);
}

/**
 * Implements hook_field_formatter_view().
 */
function colorbox_field_formatter_view($entity_type, $entity, $field, $instance, $langcode, $items, $display) {
  $element = array();
  $index = $display['settings']['colorbox_multivalue_index'];

foreach ($items as $delta => $item) {
    if ($index === NULL || $index === $delta) {
      $element[$delta] = array(
        '#theme' => 'colorbox_image_formatter',
        '#item' => $item,
        '#entity_type' => $entity_type,
        '#entity' => $entity,
        // Left for legacy support.
        '#node' => $entity,
        '#field' => $field,
        '#display_settings' => $display['settings'],
        '#delta' => $delta,
      );
    }
  }

return $element;
}

/**
 * Implements hook_insert_styles().
 *
 * @codingStandardsIgnoreStart
 * @return array
 *   Returns a array with styles.
 */
function colorbox_insert_styles() {
  $insert_styles = array();
  foreach (image_styles() as $key => $style) {
    $label = isset($style['label']) ? $style['label'] : $style['name'];
    $insert_styles['colorbox__' . $key] = array('label' => t('Colorbox @style', array('@style' => $label)));
  }

return $insert_styles;
}

/**
 * Implements hook_help().
 */
function colorbox_help($path, $arg) {

switch ($path) {
    case 'admin/help#colorbox':
      $output = '<h3>' . t('About') . '</h3>';
      $output .= '<p>' . t('<a target="_blank" href="@colorbox_project_link">Colorbox</a> is a light-weight customizable lightbox plugin for jQuery. This module allows for integration of Colorbox into Drupal.', array('@colorbox_project_link' => 'https://www.drupal.org/project/colorbox')) . '</p>';
      $output .= '<p>' . t('Images, iframed or inline content etc. can be displayed in a overlay above the current page.') . '</p>';

$output .= '<h3>' . t('Usage') . '</h3>';
      $output .= '<p>' . t('Go to "Configuration" » "Media" » "Colorbox" to find all the configuration options.') . '</p>';

$output .= '<h3>' . t('Features') . '</h3>';
      $output .= '<b>' . t('The Colorbox:') . '</b>';
      $output .= '<ul>';
      $output .= '<li>' . t('Excellent integration with Image field and Image styles') . '</li>';
      $output .= '<li>' . t('Choose between a default style and 5 example styles that are included.') . '</li>';
      $output .= '<li>' . t('Style the Colorbox with a custom colorbox.css file in your theme.') . '</li>';
      $output .= '<li>' . t('Drush command to download and install the Colorbox plugin in sites/all/libraries') . '</li>';
      $output .= '</ul>';

$output .= '<b>' . t('The Colorbox plugin:') . '</b>';
      $output .= '<ul>';
      $output .= '<li>' . t('Supports photos, grouping, slideshow, ajax, inline, and iframed content.') . '</li>';
      $output .= '<li>' . t('Appearance is controlled through CSS so it can be restyled.') . '</li>';
      $output .= '<li>' . t('Preloads upcoming images in a photo group.') . '</li>';
      $output .= '<li>' . t('Completely unobtrusive, options are set in the JS and require no') . '</li>';
      $output .= '<li>' . t('changes to existing HTML.') . '</li>';
      $output .= '<li>' . t('Compatible with: jQuery 1.3.2+ in Firefox, Safari, Chrome, Opera,') . '</li>';
      $output .= '<li>' . t('Internet Explorer 7+.') . '</li>';
      $output .= '<li>' . t('Released under the MIT License.') . '</p>';
      $output .= '</ul>';

$output .= '<h3>' . t('Colorbox screencasts') . '</h3>';
      $output .= '<b>' . t('Part 1 to 3 is for an older 7.x-1.x version of the Colorbox:') . '</b>';
      $output .= '<ul>';
      $output .= '<li>' . t('Part 1: <a href="@colorbox_screencasts_part1" target="blank">Installation and image field integration on Vimeo</a>', array('@colorbox_screencasts_part1' => 'https://vimeo.com/19122850')) . '</li>';
      $output .= '<li>' . t('Part 2: <a href="@colorbox_screencasts_part2" target="blank">Inline images with the Insert module on Vimeo</a>', array('@colorbox_screencasts_part2' => 'https://vimeo.com/19386122')) . '</li>';
      $output .= '<li>' . t('Part 3: <a href="@colorbox_screencasts_part3" target="blank">Building a image gallery and a image slideshow.</a>', array('@colorbox_screencasts_part3' => 'https://vimeo.com/26411524')) . '</li>';
      $output .= '</ul>';

$output .= '<b>' . t('Contributed screencasts:') . '</b>';
      $output .= '<ul>';
      $output .= '<li>' . t('<a href="@colorbox_contributed_screencasts_part1" target="blank">Drupal 7 Colorbox project</a> by Code Karate', array('@colorbox_contributed_screencasts_part1' => 'http://codekarate.com/daily-dose-of-drupal/drupal-7-colorbox-module')) . '</li>';
      $output .= '<li>' . t('<a href="@colorbox_contributed_screencasts_part2" target="blank">Creating and Theming a Node Photo Gallery with Drupal 7 and Colorbox</a> by High Rock Media.', array('@colorbox_contributed_screencasts_part2' => 'http://dannyenglander.com/blog/screencast-creating-and-theming-node-photo-gallery-drupal-7-and-colorbox')) . '</li>';
      $output .= '<li>' . t('<a href="@colorbox_contributed_screencasts_part3" target="blank">How to Build a Lightbox Portfolio in Drupal 7</a> by CMS Quickstart', array('@colorbox_contributed_screencasts_part3' => 'http://www.cmsquickstart.com/blog/tutorial-how-build-lightbox-portfolio-drupal-7')) . '</li>';
      $output .= '</ul>';

$output .= '<h3>' . t('Load Content in a Colorbox') . '</h3>';
      $output .= '<p>' . t('Check the "Enable Colorbox load" option in Colorbox settings.') . '</p>';
      $output .= '<p>' . t('This enables custom links that can open content in a Colorbox.') . '</p>';
      $output .= '<p>' . t('Add the class "colorbox-load" to the link and build the url like this "[path]?width=500&height=500&iframe=true" or "[path]?width=500&height=500" if you don\'t want an iframe.') . '</p>';
      $output .= '<p>' . t('Other projects may activate this for easy Colorbox integration.') . '</p>';

$output .= '<h3>' . t('Load Images from custom links in a Colorbox') . '</h3>';
      $output .= '<p>' . t('Add the class "colorbox" to the link and point its href attribute to the image you want to display in the Colorbox.') . '</p>';

return $output;
  }
}

/**
 * Implements hook_insert_content().
 */
function colorbox_insert_content($item, $style, $widget) {
  list($item['module_name'], $item['style_name']) = explode('__', $style['name'], 2);
  return theme(array(
    'colorbox_insert_image__' . str_replace('-', '_', $item['style_name']),
    'colorbox_insert_image',
      ), array(
    'item' => $item,
    'widget' => $widget,
  ));
}

/**
 * Gallery Exists Function.
 *
 * Machine names normally need to be unique but that does not apply to
 * galleries.
 *
 * @return false
 *   Always FALSE
 */
function colorbox_gallery_exists() {
  return FALSE;
}