diff options
Diffstat (limited to 'modules/block/block.admin.inc')
| -rw-r--r-- | modules/block/block.admin.inc | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/modules/block/block.admin.inc b/modules/block/block.admin.inc index cc97d5227..436ca29b3 100644 --- a/modules/block/block.admin.inc +++ b/modules/block/block.admin.inc @@ -7,6 +7,30 @@ */ /** + * Implement hook_form_FORM_ID_alter(). + */ +function block_form_system_performance_settings_alter(&$form, &$form_state) { + $disabled = count(module_implements('node_grants')); + $form['caching']['block_cache'] = array( + '#type' => 'checkbox', + '#title' => t('Cache blocks'), + '#default_value' => variable_get('block_cache', FALSE), + '#disabled' => $disabled, + '#description' => $disabled ? t('Block caching is inactive because you have enabled modules defining content access restrictions.') : NULL, + '#weight' => -1, + ); + + // Check if the "Who's online" block is enabled. + $online_block_enabled = db_query_range("SELECT 1 FROM {block} b WHERE module = 'user' AND delta = 'online' AND status = 1", array(), 0, 1)->fetchField(); + + // If the "Who's online" block is enabled, append some descriptive text to + // the end of the form description. + if ($online_block_enabled) { + $form['page_cache']['cache']['#description'] .= '<p>' . t('When caching is enabled, anonymous user sessions are only saved to the database when needed, so the "Who\'s online" block does not display the number of anonymous users.') . '</p>'; + } +} + +/** * Menu callback for admin/structure/block. */ function block_admin_display($theme = NULL) { |