WAI-ARIA roles added to core blocks

WAI-ARIA roles have been added to core module blocks. For more information see WAI-ARIA roles.

The following WAI-ARIA roles were added (if not specified, the role has been added to all blocks output from the module):

• complementary
  • aggregator.module
  • help.module
  • syndicate block in node.module
  • poll.module
  • powered-by and help blocks in system.module
  • new and online blocks in user.module
• form
  • login block in user.module
• navigation
  • book.module
  • comment.module
  • forum.module
  • locale.module
  • menu.module
  • recent block in node.module
  • shortcut.module
  • statistics.module
  • Menu blocks in system.module
• search
  • form block in search.module

Module developers can add WAI-ARIA roles to their blocks by implementing hook_preprocess_block().

/**
 * Implements hook_preprocess_block().
 * 
 * Adds 'complementary' WAI-ARIA role to all blocks from this module.
 */
function MYMODULE_preprocess_block(&$variables) {
  if ($variables['block']->module == 'MYMODULE') {
    $variables['attributes_array']['role'] = 'complementary';
  }
}