cmscdn.module

<?php

/**
 * @file
 * Finds a predetermined set of JavaScript references and points them to a shared CDN domain
 * When JavaScript Aggregation is enabled this module will still function by not allowing
 * those files to be aggregated, and listing them out separately.
 */

// Disables the modules functionality temporarily if not active
define('CMSCDN_STATUS', variable_get('cmscdn_status', 'active'));

// CMS CDN Domain
define('CMSCDN_DEFAULT_DOMAIN', 'http://static.cmscdn.net/drupal/');
define('CMSCDN_DOMAIN', variable_get('cmscdn_domain', CMSCDN_DEFAULT_DOMAIN));

// If aggregation is turned on files need to be flagged to not aggregate
define('CMSCDN_JS_AGGREGATION', variable_get('cmscdn_aggregate_js', FALSE));
define('CMSCDN_CSS_AGGREGATION', variable_get('cmscdn_aggregate_css', FALSE));

/**
 * Implements hook_menu().
 */
function cmscdn_menu() {
  $items = array();
  $path = drupal_get_path('module', 'cmscdn');

  $items['admin/config/system/cmscdn'] = array(
    'title' => 'CMS CDN Settings',
    'description' => 'Configure settings for CMS CDN module.',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('cmscdn_settings'),
    'type' => MENU_NORMAL_ITEM,
    'file' => 'cmscdn.admin.inc',
    'access arguments' => array('administer site configuration'),
    'file path' => $path,
  );

  return $items;
}

/**
 * Implements hook_js_alter().
 */
function cmscdn_js_alter(&$js) {
  if (CMSCDN_STATUS !== 'active') {
    return;
  }

  if (CMSCDN_JS_AGGREGATION) {
    // Adds external aggregated JavaScript file
    $js = drupal_add_js(CMSCDN_DOMAIN . VERSION . '/core.min.js', 'external');
  }
  else {
    // Adds external JavaScript files
    $js = drupal_add_js(CMSCDN_DOMAIN . VERSION . '/misc/drupal.js', array('type' => 'external', 'weight' => -19));
    $js = drupal_add_js(CMSCDN_DOMAIN . VERSION . '/misc/jquery.once.js', array('type' => 'external', 'weight' => -20));
  }

  unset($js['misc/drupal.js']);
  unset($js['misc/jquery.once.js']);

}
/**
 * Implements hook_css_alter().
 */
function cmscdn_css_alter(&$css) {
  if (CMSCDN_STATUS !== 'active') {
    return;
  }

  global $language;
  $core_css = array();

  if ($language->dir == 'rtl') {
    // All known Right to Left core CSS files
    $core_css = array(
      'modules/system/system.base-rtl.css',
      'modules/system/system.menus-rtl.css',
      'modules/system/system.admin-rtl.css',
      'modules/system/system.messages-rtl.css',
      'modules/system/system.theme-rtl.css',
      'modules/field/theme/field-rtl.css',
      'modules/node/node.css',
      'modules/user/user-rtl.css',
    );
  }
  else {
    // All known core CSS files
    $core_css = array(
      'modules/system/system.base.css',
      'modules/system/system.menus.css',
      'modules/system/system.admin.css',
      'modules/system/system.messages.css',
      'modules/system/system.theme.css',
      'modules/field/theme/field.css',
      'modules/node/node.css',
      'modules/user/user.css',
    );
  }

  if (CMSCDN_CSS_AGGREGATION) {
    // Adds external aggregated CSS file
    // Use rtl files for any right to left language sites
    if ($language->dir == 'rtl') {
      $css = drupal_add_css(CMSCDN_DOMAIN . VERSION . '/core-rtl.min.css', array('type' => 'external', 'weight' => -1));
    }
    else {
      $css = drupal_add_css(CMSCDN_DOMAIN . VERSION . '/core.min.css', array('type' => 'external', 'weight' => -1));
    }
  }
  else {
    // Adds external CSS files
    foreach ($core_css as $file) {
      $css = drupal_add_css(CMSCDN_DOMAIN . VERSION . '/' . $file, array('type' => 'external', 'weight' => 0));
    }
  }

  // Removes all known core CSS files
  foreach ($core_css as $key) {
    unset($css[$key]);
  }

}