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Edit File: jquery_update.module

<?php

/**
 * @file
 * Updates Drupal to use the latest version of jQuery.
 */

define('JQUERY_UPDATE_DEFAULT_JQUERY_VERSION', '1.12');

/**
 * Implements hook_help().
 */
function jquery_update_help($path, $arg) {
  switch ($path) {
    // Help for another path in the block module.
    case 'admin/config/development/jquery_update':
      return '<p>' . t('Configure how <a href="@jquery">jQuery</a> behaves on the site. Select which jQuery version, the compression level and whether or not to use a CDN.', array(
        '@jquery' => 'http://jquery.com',
      )) . '</p>';
  }
}

/**
 * Implements hook_library().
 */
function jquery_update_library() {
  // Register libraries available in the external directory.
  $path = drupal_get_path('module', 'jquery_update') . '/ui/external';
  $libraries['qunit'] = array(
    'title' => 'QUnit',
    'js' => array(
      $path . '/qunit.js' => array(
        'group' => JS_LIBRARY,
        'weight' => 2,
      ),
    ),
    'css' => array(
      $path . '/qunit.css' => array(),
    ),
    'version' => '1.11.0',
  );
  $libraries['jquery_update.ajax.fix'] = array(
    'title' => 'jQuery Update Version Fix',
    'js' => array(
      drupal_get_path('module', 'jquery_update') . '/js/jquery_update.js' => array(
        'group' => JS_LIBRARY,
        'weight' => 3,
      ),
    ),
    'version' => '0.0.1',
  );
  $libraries['jquery_update.browser.fix'] = array(
    'title' => 'jQuery Update Browser Fix',
    'js' => array(
      drupal_get_path('module', 'jquery_update') . '/js/jquery_browser.js' => array(
        'group' => JS_LIBRARY,
        'weight' => 3,
      ),
    ),
    'version' => '0.0.1',
  );
  $libraries['jquery_update.position.fix'] = array(
    'title' => 'jQuery Update Position Fix',
    'js' => array(
      drupal_get_path('module', 'jquery_update') . '/js/jquery_position.js' => array(
        'group' => JS_THEME,
        'weight' => 2,
      ),
    ),
    'version' => '0.0.1',
  );
  $libraries['jquery.metadata'] = array(
    'title' => 'QUnit',
    'js' => array(
      $path . '/jquery.metadata.js' => array(
        'group' => JS_LIBRARY,
        'weight' => 2,
      ),
    ),
    'version' => '4187',
  );
  $libraries['jquery.bgiframe'] = array(
    'title' => 'bgiframe',
    'website' => 'http://docs.jquery.com/Plugins/bgiframe',
    'js' => array(
      $path . '/jquery.bgiframe.js' => array(
        'group' => JS_LIBRARY,
        'weight' => 2,
      ),
    ),
    'version' => '2.1.2',
  );

return $libraries;
}

/**
 * Implements hook_library_alter().
 *
 * {@inheritdoc}
 */
function jquery_update_library_alter(&$libraries, $module) {
  // Immediately return if not modifying the system libraries.
  if ($module !== 'system') {
    return;
  }

$path = drupal_get_path('module', 'jquery_update');
  $min = variable_get('jquery_update_compression_type', 'min') == 'none' ? '' : '.min';
  $jquery_version = variable_get('jquery_update_jquery_version', JQUERY_UPDATE_DEFAULT_JQUERY_VERSION);

// Make sure we inject either the minified or uncompressed version as desired.
  $cdn = variable_get('jquery_update_jquery_cdn', 'none');

// Replace jQuery with the alternative version.
  $theme_version = theme_get_setting('jquery_update_jquery_version');
  if ($theme_version && version_compare($jquery_version, $theme_version, '!=')) {
    $jquery_version = $theme_version;
  }

// If the ajax version is set then that one always win.
  if (!empty($_POST['ajax_page_state']['jquery_version']) && !empty($_POST['ajax_page_state']['jquery_version_token'])) {
    $ajax_version = $_POST['ajax_page_state']['jquery_version'];
    $token = $_POST['ajax_page_state']['jquery_version_token'];
    $allowed_versions = array('default') + jquery_update_get_versions();
    if (in_array($ajax_version, $allowed_versions) && drupal_valid_token($token, $ajax_version)) {
      $jquery_version = $ajax_version;
    }
  }

// Always add a new jquery_version array to ajaxPageState.
  // This is what we used to determine which version to use
  // for any ajax callback.
  $libraries['drupal.ajax']['js'][] = array(
    'data' => array(
      'ajaxPageState' => array(
        'jquery_version' => $jquery_version,
        'jquery_version_token' => drupal_get_token($jquery_version),
      ),
    ),
    'type' => 'setting',
  );
  $libraries['drupal.ajax']['dependencies'][] = array('jquery_update', 'jquery_update.ajax.fix');

// Don't replace anything if Drupal provided jQuery should be used.
  if ('default' == $jquery_version) {
    return;
  }

jquery_update_jquery_replace($libraries, $cdn, $path, $min, $jquery_version);

$jqueryui_custom_version = (bool) variable_get('jquery_update_custom_version_jqueryui', FALSE);
  // Replace jQuery UI with CDN or local files. If from a CDN include all of
  // jQuery UI.
  if ($jqueryui_custom_version || version_compare($jquery_version, '1.6', '>=')) {
    jquery_update_jqueryui_replace($libraries, $cdn, $path, $min);
  }

// Add jquery-cookie plugin.
  jquery_update_jquery_cookie_replace($libraries, $path, $min);

// Add jquery.form plugin.
  jquery_update_jquery_form_replace($libraries, $path, $min, $jquery_version);

// Add jQuery.migrate plugin, if needed.
  jquery_update_jquery_migrate_replace($libraries, $path, $min, $jquery_version);
}

/**
 * Implements hook_menu().
 */
function jquery_update_menu() {
  $items['admin/config/development/jquery_update'] = array(
    'title' => 'jQuery Update',
    'description' => 'Configure settings related to the jQuery upgrade, the library path and compression.',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('jquery_update_settings_form'),
    'access arguments' => array('administer jquery update'),
    'file' => 'jquery_update.admin.inc',
  );
  $items['admin/config/development/jquery_update/refresh-version-info'] = array(
    'title' => 'Refresh jQuery Update latest version info',
    'description' => "Update jQuery Update's info about the latest versions of its jQuery libraries.",
    'page callback' => 'jquery_update_refresh_version_info',
    'access arguments' => array('administer jquery update'),
    'file' => 'jquery_update.admin.inc',
  );

return $items;
}

/**
 * Implements hook_form_FORM_ID_alter().
 */
function jquery_update_form_system_theme_settings_alter(&$form, $form_state) {
  // Ignore global theme settings.
  if (empty($form_state['build_info']['args'][0])) {
    return;
  }
  $form['jquery_update'] = array(
    '#type' => 'fieldset',
    '#title' => t('jQuery Update'),
    '#description' => t('You can optionally select a different version of jQuery to use for pages that are rendered using this theme. This is useful for administrative based themes.'),
    '#access' => user_access('administer jquery update'),
  );
  $form['jquery_update']['jquery_update_jquery_version'] = array(
    '#type' => 'select',
    '#title' => t('Theme specific jQuery version'),
    '#options' => jquery_update_get_version_options(),
    '#default_value' => theme_get_setting('jquery_update_jquery_version', $form_state['build_info']['args'][0]),
  );
}

/**
 * Retrieve the jQuery versions available by this module.
 *
 * @return array
 *   The available jQuery versions.
 */
function jquery_update_get_versions() {
  // Use the advanced drupal_static() pattern, since this has the potential
  // to be called very often.
  static $drupal_static_fast;
  if (!isset($drupal_static_fast)) {
    $drupal_static_fast['versions'] = &drupal_static(__FUNCTION__, drupal_map_assoc(array(
      // 1.x.
      '1.12',

// 2.x.
      '2.2',
    )));
  }
  return $drupal_static_fast['versions'];
}

/**
 * Retrieve the jQuery versions available by this module as select options.
 *
 * @param bool $empty
 *   Toggle on whether or not to return an empty option, which will default
 *   to the site wide default setting.
 *
 * @return array
 *   The available jQuery versions used to populate a select input.
 */
function jquery_update_get_version_options($empty = TRUE) {
  $options = array_merge(array(
    '' => t('Site default (!version)', array(
      '!version' => variable_get('jquery_update_jquery_version', JQUERY_UPDATE_DEFAULT_JQUERY_VERSION),
    )),
    'default' => t('1.4 (Drupal core)'),
  ), jquery_update_get_supported_version_options());
  if (!$empty) {
    unset($options['']);
  }
  return $options;
}

/**
 * Generate an array of jQuery versions including any custom version.
 */
function jquery_update_get_supported_version_options() {
  $options = array();
  foreach (jquery_update_get_versions() as $version) {
    $options[$version] = $version;
  }
  $custom_jquery = variable_get('jquery_update_custom_version_jquery', FALSE);
  if (!empty($custom_jquery)) {
    $options[$custom_jquery] = $custom_jquery . ' ' . t('(Custom)');
  }
  return $options;
}

/**
 * Update jQuery to the CDN or local path.
 *
 * @param array $javascript
 *   The library definition array as seen in hook_library_alter().
 * @param string $cdn
 *   The name of the CDN option to use. Possible options are:
 *   - none
 *   - google
 *   - microsoft.
 * @param string $path
 *   The path to the module where replacements can be found.
 * @param string $min
 *   The '.min' to include in the file name if we are requesting a minified
 *   version.
 * @param string $version
 *   The jQuery version to be used.
 */
function jquery_update_jquery_replace(array &$javascript, $cdn, $path, $min, $version) {

$custom_path = variable_get('jquery_update_custom_path_jquery', FALSE);
  $custom_version = variable_get('jquery_update_custom_version_jquery', FALSE);
  if (!empty($custom_path) && $version == $custom_version) {
    $javascript['jquery']['js']['misc/jquery.js']['data'] = $custom_path;
    $javascript['jquery']['js']['misc/jquery.js']['type'] = url_is_external($custom_path) ? 'external' : 'file';
    if (!empty($custom_version)) {
      $javascript['jquery']['version'] = $custom_version;
      jquery_update_add_jquery_browser_fix($javascript, $custom_version);
      jquery_update_add_jquery_position_fix($javascript, $custom_version);
    }
    return;
  }

// In case we've been passed an obsolete jQuery version ensure that the
  // versions stored in settings are all supported, and map the current request
  // to a supported version.
  $supported_versions = jquery_update_get_versions();
  if (!in_array($version, $supported_versions)) {
    _jquery_update_convert_settings_to_supported_versions();
    // The global default and any theme-specific versions should have been
    // updated but we still need to replace the version passed to this function.
    $version = _jquery_update_map_to_supported_version($version);
  }

// Make sure to use the latest version in given branch.
  $trueversion = NULL;
  switch ($version) {
    case '1.12':
      $trueversion = '1.12.4';
      break;

case '2.2':
      $trueversion = '2.2.4';
      break;
  }
  $javascript['jquery']['version'] = $trueversion;

// Check for CDN support.
  switch ($cdn) {
    case 'google':
      $javascript['jquery']['js']['misc/jquery.js']['data'] = '//ajax.googleapis.com/ajax/libs/jquery/' . $trueversion . '/jquery' . $min . '.js';
      $javascript['jquery']['js']['misc/jquery.js']['type'] = 'external';
      jquery_update_jquery_backup($javascript, $path, $min, $version);
      break;

case 'microsoft':
      $javascript['jquery']['js']['misc/jquery.js']['data'] = '//ajax.aspnetcdn.com/ajax/jQuery/jquery-' . $trueversion . $min . '.js';
      $javascript['jquery']['js']['misc/jquery.js']['type'] = 'external';
      jquery_update_jquery_backup($javascript, $path, $min, $version);
      break;

case 'jquery':
      $javascript['jquery']['js']['misc/jquery.js']['data'] = '//code.jquery.com/jquery-' . $trueversion . $min . '.js';
      $javascript['jquery']['js']['misc/jquery.js']['type'] = 'external';
      jquery_update_jquery_backup($javascript, $path, $min, $version);
      break;

case 'none':
    default:
      $javascript['jquery']['js']['misc/jquery.js']['data'] = $path . '/replace/jquery/' . $version . '/jquery' . $min . '.js';
      break;
  }
  jquery_update_add_jquery_browser_fix($javascript, $version);
  jquery_update_add_jquery_position_fix($javascript, $version);
}

/**
 * Add a workaround for deprecated jQuery.browser.
 */
function jquery_update_add_jquery_browser_fix(&$libraries, $jquery_version) {
  if (version_compare($jquery_version, '1.9', '>=')) {
    $libraries['jquery']['dependencies'][] = array(
      'jquery_update',
      'jquery_update.browser.fix',
    );
  }
}

/**
 * Add a workaround for .position() behaviour change.
 */
function jquery_update_add_jquery_position_fix(&$libraries, $jquery_version) {
  if (version_compare($jquery_version, '3.3', '>=')) {
    $libraries['jquery']['dependencies'][] = array(
      'jquery_update',
      'jquery_update.position.fix',
    );
  }
}

/**
 * Add the local fallback in case jQuery from the CDN is unavailable.
 *
 * @param array $javascript
 *   The $libraries array as seen in hook_library_alter()
 * @param string $path
 *   The path to the module where replacements can be found.
 * @param string $min
 *   The '.min' to include in the file name if we are requesting a minified
 *   version.
 * @param string $version
 *   The jQuery version to be used.
 */
function jquery_update_jquery_backup(array &$javascript, $path, $min, $version) {
  $javascript['jquery']['js'][] = array(
    'data' => 'window.jQuery || document.write("<script src=\'' . base_path() . $path . '/replace/jquery/' . $version . '/jquery' . $min . '.js\'>\x3C/script>")',
    'type' => 'inline',
    'group' => JS_LIBRARY,
    'weight' => -19.999999999,
  );
}

/**
 * Enable and configure the jQuery Migrate Plugin.
 *
 * @param array $libraries
 *   The library definition array as seen in hook_library_alter().
 * @param string $path
 *   The path to the module where replacements can be found.
 * @param string $min
 *   The '.min' to include in the file name if we are requesting a minified
 *   version.
 * @param string $version
 *   The jQuery version to be used.
 */
function jquery_update_jquery_migrate_replace(array &$libraries, $path, $min, $version) {
  // Immediately return if jQuery Migrate isn't enabled or jQuery version
  // isn't at least 1.9 or higher.
  if (!variable_get('jquery_update_jquery_migrate_enable', FALSE) || !version_compare($version, '1.9', '>=')) {
    return;
  }

$custom_path = variable_get('jquery_update_custom_path_migrate', FALSE);
  if (version_compare($version, '3.0', '>=')) {
    $migrate_version = '3';
    if (empty($custom_path)) {
      // jQuery 3.x and Migrate 3.x are only supported via a custom path.
      return;
    }
  }
  else {
    $migrate_version = '1';
  }

$file = $path . '/replace/jquery-migrate/' . $migrate_version . '/jquery-migrate' . $min . '.js';

// Note: this adds jQuery Migrate to the "system" module's library definition.
  $libraries['jquery.migrate'] = array(
    'title' => 'jQuery Migrate',
    'website' => 'http://plugins.jquery.com/migrate',
    'version' => $migrate_version,
    'js' => array(
      $file => array(
        'group' => JS_LIBRARY,

// Ensure weight is higher than jQuery.
        'weight' => -19.8,
      ),
    ),
  );

// Configure the jQuery Migrate plugin.
  // Note: This must be done after jQuery has loaded, but before the jQuery
  // migrate plugin has loaded.
  $data = 'jQuery.migrateMute=' . (variable_get('jquery_update_jquery_migrate_warnings', FALSE) ? 'false' : 'true') . ';';
  $data .= 'jQuery.migrateTrace=' . (variable_get('jquery_update_jquery_migrate_trace', FALSE) ? 'true' : 'false') . ';';
  $libraries['jquery.migrate']['js'][] = array(
    'data' => $data,
    'type' => 'inline',
    'group' => JS_LIBRARY,

// Ensure weight is lower than jQuery Migrate.
    'weight' => -19.899999999,
  );

// Check for CDN support.
  if (empty($custom_path)) {
    if (variable_get('jquery_update_jquery_migrate_cdn', 'none') === 'jquery') {
      $default_migrate_version = ($migrate_version === '3') ? '3.0.0' : '1.4.1';
      $jquery_migrate_cdn_version = variable_get('jquery_update_custom_version_jquery_migrate', FALSE);
      if ($jquery_migrate_cdn_version !== FALSE) {
        $migrate_version = $jquery_migrate_cdn_version;
      }
      else {
        $migrate_version = $default_migrate_version;
      }

$libraries['jquery.migrate']['js'][$file]['data'] = '//code.jquery.com/jquery-migrate-' . $migrate_version . $min . '.js';
      $libraries['jquery.migrate']['js'][$file]['type'] = 'external';
      jquery_update_jquery_migrate_backup($libraries, $path, $min, $default_migrate_version);
    }
  }
  else {
    $libraries['jquery.migrate']['js'][$file]['data'] = $custom_path;
    if (strpos($custom_path, '//') !== FALSE) {
      $libraries['jquery.migrate']['js'][$file]['type'] = 'external';
    }
    $custom_version = variable_get('jquery_update_custom_version_jquery_migrate', FALSE);
    if (!empty($custom_version)) {
      $libraries['jquery.migrate']['version'] = $custom_version;
    }
  }

// Add jQuery Migrate as a dependency to jQuery.
  // Note: this is fine as the weight set above ensures it loads after jQuery.
  $libraries['jquery']['dependencies'][] = array('system', 'jquery.migrate');
}

/**
 * Add local fallback in case the jQuery Migrate Plugin from CDN is unavailable.
 *
 * @param array $javascript
 *   The $libraries array as seen in hook_library_alter()
 * @param string $path
 *   The path to the module where replacements can be found.
 * @param string $min
 *   The '.min' to include in the file name if we are requesting a minified
 *   version.
 * @param string $migrate_version
 *   The jQuery Migrate version to be used.
 */
function jquery_update_jquery_migrate_backup(array &$javascript, $path, $min, $migrate_version) {
  $javascript['jquery.migrate']['js'][] = array(
    'data' => 'window.jQuery && window.jQuery.migrateWarnings || document.write("<script src=\'' . base_path() . $path . '/replace/jquery-migrate/' . $migrate_version . '/jquery-migrate' . $min . '.js\'>\x3C/script>")',
    'type' => 'inline',
    'group' => JS_LIBRARY,
    'weight' => -19.7999999999,
  );
}

/**
 * Update jQuery UI to the CDN or local path.
 *
 * @param array $javascript
 *   The library definition array as seen in hook_library_alter().
 * @param string $cdn
 *   The name of the CDN option to use. Possible options are:
 *   - none
 *   - google
 *   - microsoft.
 * @param string $path
 *   The path to the module where replacements can be found.
 * @param string $min
 *   The '.min' to include in the file name if we are requesting a minified
 *   version.
 */
function jquery_update_jqueryui_replace(array &$javascript, $cdn, $path, $min) {

$jqueryui_version = variable_get('jquery_update_custom_version_jqueryui', FALSE);
  if (empty($jqueryui_version)) {
    $jqueryui_version = '1.10.2';
  }

// Add new components.
  $javascript['ui.menu'] = array(
    'title' => 'jQuery UI: Menu',
    'website' => 'http://jqueryui.com/demos/menu/',
    'version' => $jqueryui_version,
    'js' => array('misc/ui/jquery.ui.menu.min.js' => array()),
    'css' => array('misc/ui/jquery.ui.menu.css' => array()),
    'dependencies' => array(
      array('system', 'ui.widget'),
      array('system', 'ui.position'),
    ),
  );
  $javascript['ui.spinner'] = array(
    'title' => 'jQuery UI: Spinner',
    'website' => 'http://jqueryui.com/demos/spinner/',
    'version' => $jqueryui_version,
    'js' => array('misc/ui/jquery.ui.spinner.min.js' => array()),
    'css' => array('misc/ui/jquery.ui.spinner.css' => array()),
    'dependencies' => array(
      array('system', 'ui.widget'),
      array('system', 'ui.button'),
    ),
  );
  $javascript['ui.tooltip'] = array(
    'title' => 'jQuery UI: Tooltip',
    'website' => 'http://jqueryui.com/demos/tooltip/',
    'version' => $jqueryui_version,
    'js' => array('misc/ui/jquery.ui.tooltip.min.js' => array()),
    'css' => array('misc/ui/jquery.ui.tooltip.css' => array()),
    'dependencies' => array(
      array('system', 'ui.widget'),
      array('system', 'ui.position'),
    ),
  );

// Fix dependencies.
  $javascript['ui.autocomplete']['dependencies'][] = array('system', 'ui.menu');
  // Replace all CSS files.
  $names = drupal_map_assoc(array(
    'ui.accordion', 'ui.autocomplete', 'ui.button', 'ui.datepicker', 'ui.dialog',
    'ui.progressbar', 'ui.resizable', 'ui.selectable', 'ui.slider', 'ui.tabs',
    'ui.menu', 'ui.spinner', 'ui.tooltip',
  ));
  $names['ui'] = 'ui.core';
  $csspath = $path . '/replace/ui/themes/base/' . (($min == '.min') ? 'minified/' : '');
  foreach ($names as $name => $file) {
    $javascript[$name]['css']["misc/ui/jquery.$file.css"]['data'] = $csspath . 'jquery.' . $file . $min . '.css';
  }
  // Make sure ui.theme is replaced as well.
  $javascript['ui']['css']['misc/ui/jquery.ui.theme.css']['data'] = $csspath . 'jquery.ui.theme' . $min . '.css';

// Replace jQuery UI's JavaScript, beginning by defining the mapping.
  $names = drupal_map_assoc(array(
    'ui.accordion', 'ui.autocomplete', 'ui.button', 'ui.datepicker', 'ui.dialog', 'ui.draggable',
    'ui.droppable', 'ui.mouse', 'ui.position', 'ui.progressbar', 'ui.resizable', 'ui.selectable',
    'ui.slider', 'ui.sortable', 'ui.tabs', 'ui.widget', 'ui.spinner', 'ui.menu', 'ui.tooltip',
  ));
  $names['ui'] = 'ui.core';
  // map[library_hook] = array(core_fn, updated_fn)
  $names['effects'] = array('effects.core', 'ui.effect');
  $names = jquery_update_make_library_hook_to_file_name_segment_map_for_effects($names);

$custom_path = variable_get('jquery_update_custom_path_jqueryui', FALSE);
  if (!empty($custom_path)) {
    jquery_update_jqueryui_cdn($custom_path, $javascript, $path, $min, $names, $jqueryui_version);
    return;
  }

switch ($cdn) {
    case 'google':
      $cdn = '//ajax.googleapis.com/ajax/libs/jqueryui/' . $jqueryui_version . '/jquery-ui' . $min . '.js';
      jquery_update_jqueryui_cdn($cdn, $javascript, $path, $min, $names, $jqueryui_version);
      jquery_update_jqueryui_backup($javascript, $path, $min);
      break;

case 'microsoft':
      $cdn = '//ajax.aspnetcdn.com/ajax/jquery.ui/' . $jqueryui_version . '/jquery-ui' . $min . '.js';
      jquery_update_jqueryui_cdn($cdn, $javascript, $path, $min, $names, $jqueryui_version);
      jquery_update_jqueryui_backup($javascript, $path, $min);
      break;

case 'jquery':
      $cdn = '//code.jquery.com/ui/' . $jqueryui_version . '/jquery-ui' . $min . '.js';
      jquery_update_jqueryui_cdn($cdn, $javascript, $path, $min, $names, $jqueryui_version);
      jquery_update_jqueryui_backup($javascript, $path, $min);
      break;

case 'none':
      jquery_update_jqueryui_local($javascript, $path, $min, $names);
      break;
  }
}

/**
 * Create a mapping from system.module library hooks to file name segments.
 *
 * @param array $map
 *   Optional. If given, append to it.
 *
 * @return array
 *   The keys are library hooks and the values are each arrays of 2 file name
 *   segments as values. The first file name segment can be used to reach Drupal
 *   core's jQuery UI effect files, and the second file name segment can be used
 *   to construct a path to the equivalent replacement jQuery UI effect file
 *   provided by jquery_update.module.
 */
function jquery_update_make_library_hook_to_file_name_segment_map_for_effects(array $map = array()) {
  $effect_names = array(
    'blind', 'bounce', 'clip', 'drop', 'explode', 'fade', 'fold',
    'highlight', 'pulsate', 'scale', 'shake', 'slide', 'transfer',
  );
  foreach ($effect_names as $effect_name) {
    $library_hook = 'effects.' . $effect_name;
    // Yes, for the effect files, this is indeed identical.
    $file_name_segment_core = $library_hook;
    $file_name_segment_updated = 'ui.effect-' . $effect_name;
    $map[$library_hook] = array($file_name_segment_core, $file_name_segment_updated);
  }
  return $map;
}

/**
 * Add the local fallback in case jQuery UI from the CDN is unavailable.
 *
 * @param array $javascript
 *   The $libraries array as seen in hook_library_alter()
 * @param string $path
 *   The path to the module where replacements can be found.
 * @param string $min
 *   The '.min' to include in the file name if we are requesting a minified
 *   version.
 */
function jquery_update_jqueryui_backup(array &$javascript, $path, $min) {
  $js_path = ($min == '.min') ? '/replace/ui/ui/minified/jquery-ui.min.js' : '/replace/ui/ui/jquery-ui.js';
  $javascript['ui']['js'][] = array(
    'data' => 'window.jQuery.ui || document.write("<script src=\'' . base_path() . $path . $js_path . '\'>\x3C/script>")',
    'type' => 'inline',
    'group' => JS_LIBRARY,
    'weight' => -10.999999999,
  );
}

/**
 * Handle when jQuery UI is updated to the cdn version.
 *
 * @param string $cdn
 *   The name of the CDN option to use. Possible options are:
 *   - none
 *   - google
 *   - microsoft.
 * @param array $javascript
 *   The $libraries array as seen in hook_library_alter()
 * @param string $path
 *   The path to the module where replacements can be found.
 * @param string $min
 *   The '.min' to include in the file name if we are requesting a minified
 *   version.
 *   * @param array $names
 *   An array mapping jquery ui parts to their file names.
 */
function jquery_update_jqueryui_cdn($cdn, array &$javascript, $path, $min, $names, $jqueryui_version) {

// Construct the jQuery UI path and replace the JavaScript.
  $jspath = $path . '/replace/ui/ui/' . ($min == '.min' ? 'minified/' : '');
  foreach ($names as $name => $file) {
    list($file_core, $file_updated) = is_array($file) ? $file : array($file, $file);
    $corefile = 'misc/ui/jquery.' . $file_core . '.min.js';
    // Remove the core files.
    unset($javascript[$name]['js'][$corefile]);
    $javascript[$name]['version'] = $jqueryui_version;
  }

// UI is used by all of UI. Add the js cdn here.
  $javascript['ui']['js'][$cdn] = array(
    'data' => $cdn,
    'type' => url_is_external($cdn) ? 'external' : 'file',
    'group' => JS_LIBRARY,
    'weight' => -11,
  );

// The cdn puts jQuery UI core and the jQuery UI Effects library in the same
  // file, but the latter can normally be used without the former. So we need
  // to add a dependency to guarantee that code which uses the Effects library
  // has the file loaded regardless of whether they are also using jQuery UI
  // core.
  $javascript['effects']['dependencies'][] = array('system', 'ui');
}

/**
 * Handle when jQuery UI is updated to the local version.
 *
 * @param array $javascript
 *   The $libraries array as seen in hook_library_alter()
 * @param string $path
 *   The path to the module where replacements can be found.
 * @param string $min
 *   The '.min' to include in the file name if we are requesting a minified
 *   version.
 * @param array $names
 *   An array mapping jquery ui parts to their file names.
 */
function jquery_update_jqueryui_local(array &$javascript, $path, $min, array $names) {

// Construct the jQuery UI path and replace the JavaScript.
  $jspath = $path . '/replace/ui/ui/' . ($min == '.min' ? 'minified/' : '');
  foreach ($names as $name => $file) {
    list($file_core, $file_updated) = is_array($file) ? $file : array($file, $file);
    $corefile = 'misc/ui/jquery.' . $file_core . '.min.js';
    $javascript[$name]['js'][$corefile]['data'] = $jspath . 'jquery.' . $file_updated . $min . '.js';
    $javascript[$name]['version'] = '1.10.2';
  }
}

/**
 * Implements hook_permission().
 */
function jquery_update_permission() {
  return array(
    'administer jquery update' => array(
      'title' => t('Administer jQuery Update'),
      'restricted access' => TRUE,
      'description' => t('Perform administration tasks for jQuery Update.'),
    ),
  );
}

/**
 * Enable and configure the jQuery Cookie Plugin.
 *
 * @param array $libraries
 *   The library definition array as seen in hook_library_alter().
 * @param string $path
 *   The path to the module where replacements can be found.
 * @param string $min
 *   The '.min' to include in the file name if we are requesting a minified
 *   version.
 */
function jquery_update_jquery_cookie_replace(array &$libraries, $path, $min) {
  $custom_path = variable_get('jquery_update_custom_path_cookie', FALSE);
  if (empty($custom_path)) {
    // Replace the jQuery Cookie plugin.
    $libraries['cookie']['js']['misc/jquery.cookie.js']['data'] = $path . '/replace/ui/external/jquery.cookie.js';
    // Noting the version based on git commit as no version number is available.
    $libraries['cookie']['version'] = '67fb34f6a866c40d0570';
  }
  else {
    $libraries['cookie']['js']['misc/jquery.cookie.js']['data'] = $custom_path;
    $libraries['cookie']['js']['misc/jquery.cookie.js']['type'] = url_is_external($custom_path) ? 'external' : 'file';
    $version = variable_get('jquery_update_custom_version_jquery_cookie', FALSE);
    if ($version !== FALSE) {
      $libraries['cookie']['version'] = $version;
    }
  }
}

/**
 * Enable and configure the jQuery Form Plugin.
 *
 * @param array $libraries
 *   The library definition array as seen in hook_library_alter().
 * @param string $path
 *   The path to the module where replacements can be found.
 * @param string $min
 *   The '.min' to include in the file name if we are requesting a minified
 *   version.
 * @param string $jquery_version
 *   The jQuery version to be used.
 */
function jquery_update_jquery_form_replace(array &$libraries, $path, $min, $jquery_version) {
  $custom_path = variable_get('jquery_update_custom_path_form', FALSE);
  if (empty($custom_path)) {
    // Replace jQuery Form.
    $libraries['jquery.form']['website'] = 'https://github.com/jquery-form/form';
    $jquery_form_versions = array(
      // jQuery Form 4, prior to version 4.2.1, had a serious regression that
      // broke Drupal's AJAX system because it didn't deserialize "+" back into
      // spaces which would cause triggering button values to not match in PHP.
      // @see https://www.drupal.org/node/2860158
      '4.2.1' => '1.7',
    );
    foreach ($jquery_form_versions as $jquery_form_version => $compatibility) {
      if (version_compare($jquery_version, $compatibility, '>=')) {
        $libraries['jquery.form']['js']['misc/jquery.form.js']['data'] = $path . '/replace/jquery.form/4/jquery.form' . $min . '.js';
        $libraries['jquery.form']['version'] = $jquery_form_version;
        break;
      }
    }
  }
  else {
    $libraries['jquery.form']['js']['misc/jquery.form.js']['data'] = $custom_path;
    $libraries['jquery.form']['js']['misc/jquery.form.js']['type'] = url_is_external($custom_path) ? 'external' : 'file';
    $version = variable_get('jquery_update_custom_version_jquery_form', FALSE);
    if ($version !== FALSE) {
      $libraries['jquery.form']['version'] = $version;
    }
  }
}

/**
 * Query and store latest versions of jQuery libraries.
 *
 * @return string
 *   A version string e.g. "3.6.1" or FALSE
 */
function jquery_update_latest_version($library = 'jquery', $refresh = FALSE) {
  $check_enabled = variable_get('jquery_update_check_latest_versions', TRUE);
  $library_variable_name = _jquery_update_clean_library_name($library);
  $version = variable_get('jquery_update_latest_version_' . $library_variable_name, FALSE);
  if ($check_enabled && ($refresh || empty($version))) {
    $r = drupal_http_request('https://api.cdnjs.com/libraries/' . $library . '?fields=version');
    if ($r->code == 200) {
      $old_version = $version;
      $version = json_decode($r->data)->version;
      if ($version != $old_version) {
        watchdog('jquery_update', 'Updated latest %library version to %version', array('%library' => $library, '%version' => $version));
        variable_set('jquery_update_latest_version_' . $library_variable_name, $version);
      }
    }
  }
  return $version;
}

/**
 * Implements hook_cron().
 */
function jquery_update_cron() {
  _jquery_update_refresh_version_info();
}

/**
 * Refresh latest version info via cron or manually.
 */
function _jquery_update_refresh_version_info($refresh = FALSE) {
  $last_update = variable_get('jquery_update_latest_versions_checked', FALSE);
  if ($refresh || !$last_update || (REQUEST_TIME - $last_update) >= 24 * 60 * 60) {
    $libraries = array(
      'jquery',
      'jqueryui',
      'jquery-migrate',
      'jquery.form',
      'jquery-cookie',
    );
    foreach ($libraries as $library) {
      $version = jquery_update_latest_version($library, TRUE);
    }
    variable_set('jquery_update_latest_versions_checked', REQUEST_TIME);
  }
}

/**
 * Helper to clean up library names for use as Drupal variables.
 */
function _jquery_update_clean_library_name($library) {
  $search = array('.', '-');
  return str_replace($search, '_', $library);
}

/**
 * Check any custom versions against latest version info.
 *
 * @return array
 *   An array of libraries for which updates are available (empty array if none)
 */
function _jquery_update_check_available_updates() {
  $results = array();
  // Nothing to do if checking of latest versions is not enabled.
  if (!variable_get('jquery_update_check_latest_versions', TRUE)) {
    return $results;
  }
  $libraries = array(
    'jquery',
    'jqueryui',
    'jquery-migrate',
    'jquery.form',
    'jquery-cookie',
  );
  foreach ($libraries as $library) {
    $results[$library] = _jquery_update_check_available_update($library);
  }
  return array_keys(array_filter($results));
}

/**
 * Check a specific library for available updates.
 */
function _jquery_update_check_available_update($library) {
  $library_variable_name = _jquery_update_clean_library_name($library);
  $custom_version = variable_get('jquery_update_custom_version_' . $library_variable_name, FALSE);
  $latest_version = variable_get('jquery_update_latest_version_' . $library_variable_name, FALSE);
  if (!$custom_version || !$latest_version) {
    return FALSE;
  }
  return version_compare($custom_version, $latest_version, '<');
}

/**
 * Helper to map existing jQuery versions to one of the supported versions.
 *
 * This is for the upgrade path from previous releases of jQuery Update and is
 * not intended for use with custom versions.
 *
 * @param string $version
 *   The MAJOR.MINOR jQuery version to map.
 */
function _jquery_update_map_to_supported_version($version) {
  if ($version == 'default') {
    return $version;
  }
  if (version_compare($version, '2', '<')) {
    return '1.12';
  }
  if (version_compare($version, '1', '>')) {
    return '2.2';
  }
  return FALSE;
}

/**
 * Helper to convert all jQuery version settings to a supported version.
 */
function _jquery_update_convert_settings_to_supported_versions() {
  $jquery_version = variable_get('jquery_update_jquery_version', JQUERY_UPDATE_DEFAULT_JQUERY_VERSION);
  $mapped_version = _jquery_update_map_to_supported_version($jquery_version);
  if ($jquery_version != $mapped_version) {
    variable_set('jquery_update_jquery_version', $mapped_version);
    watchdog('jquery_update', 'jquery_update_jquery_version updated from @before to @after',
      array('@before' => $jquery_version, '@after' => $mapped_version), WATCHDOG_WARNING);
  }
  $themes = list_themes();
  foreach ($themes as $theme_key => $theme) {
    $theme_settings = variable_get('theme_' . $theme_key . '_settings', array());
    if (in_array('jquery_update_jquery_version', array_keys($theme_settings))) {
      $theme_jquery_version = $theme_settings['jquery_update_jquery_version'];
      $mapped_theme_jquery_version = _jquery_update_map_to_supported_version($theme_jquery_version);
      if ($theme_jquery_version != $mapped_theme_jquery_version) {
        $theme_settings['jquery_update_jquery_version'] = $mapped_theme_jquery_version;
        variable_set('theme_' . $theme_key . '_settings', $theme_settings);
        watchdog('jquery_update', 'theme settings for @theme: jquery_update_jquery_version updated from @before to @after',
          array(
            '@theme' => $theme_key,
            '@before' => $theme_jquery_version,
            '@after' => $mapped_theme_jquery_version,
          ), WATCHDOG_WARNING);
      }
    }
  }
}