function overlay_block_list_alter

Implements hook_block_list_alter().

File

modules/overlay/overlay.module, line 449

Code

function overlay_block_list_alter(&$blocks) {
  // If we are limiting rendering to a subset of page regions, hide all blocks
  // which appear in regions not on that list. Note that overlay_page_alter()
  // does a more comprehensive job of preventing unwanted regions from being
  // displayed (regardless of whether they contain blocks or not), but the
  // reason for duplicating effort here is performance; we do not even want
  // these blocks to be built if they are not going to be displayed.
  if ($regions_to_render = overlay_get_regions_to_render()) {
    foreach ($blocks as $bid => $block) {
      if (!in_array($block->region, $regions_to_render)) {
        unset($blocks[$bid]);
      }
    }
  }
}