function block_help

Implements hook_help().

File

core/modules/block/block.module, line 20

Code

function block_help($route_name, RouteMatchInterface $route_match) {
    switch ($route_name) {
        case 'help.page.block':
            $block_content = \Drupal::moduleHandler()->moduleExists('block_content') ? Url::fromRoute('help.page', [
                'name' => 'block_content',
            ])->toString() : '#';
            $output = '';
            $output .= '<h3>' . t('About') . '</h3>';
            $output .= '<p>' . t('The Block module allows you to place blocks in regions of your installed themes, and configure block settings. For more information, see the <a href=":blocks-documentation">online documentation for the Block module</a>.', [
                ':blocks-documentation' => 'https://www.drupal.org/documentation/modules/block/',
            ]) . '</p>';
            $output .= '<h3>' . t('Uses') . '</h3>';
            $output .= '<dl>';
            $output .= '<dt>' . t('Placing and moving blocks') . '</dt>';
            $output .= '<dd>' . t('You can place a new block in a region by selecting <em>Place block</em> on the <a href=":blocks">Block layout page</a>. Once a block is placed, it can be moved to a different region by drag-and-drop or by using the <em>Region</em> drop-down list, and then clicking <em>Save blocks</em>.', [
                ':blocks' => Url::fromRoute('block.admin_display')->toString(),
            ]) . '</dd>';
            $output .= '<dt>' . t('Toggling between different themes') . '</dt>';
            $output .= '<dd>' . t('Blocks are placed and configured specifically for each theme. The Block layout page opens with the default theme, but you can toggle to other installed themes.') . '</dd>';
            $output .= '<dt>' . t('Demonstrating block regions for a theme') . '</dt>';
            $output .= '<dd>' . t('You can see where the regions are for the current theme by clicking the <em>Demonstrate block regions</em> link on the <a href=":blocks">Block layout page</a>. Regions are specific to each theme.', [
                ':blocks' => Url::fromRoute('block.admin_display')->toString(),
            ]) . '</dd>';
            $output .= '<dt>' . t('Configuring block settings') . '</dt>';
            $output .= '<dd>' . t('To change the settings of an individual block click on the <em>Configure</em> link on the <a href=":blocks">Block layout page</a>. The available options vary depending on the module that provides the block. For all blocks you can change the block title and toggle whether to display it.', [
                ':blocks' => Url::fromRoute('block.admin_display')->toString(),
            ]) . '</dd>';
            $output .= '<dt>' . t('Controlling visibility') . '</dt>';
            $output .= '<dd>' . t('You can control the visibility of a block by restricting it to specific pages, content types, and/or roles by setting the appropriate options under <em>Visibility settings</em> of the block configuration.') . '</dd>';
            $output .= '<dt>' . t('Adding custom blocks') . '</dt>';
            $output .= '<dd>' . t('You can add custom blocks, if the <em>Custom Block</em> module is installed. For more information, see the <a href=":blockcontent-help">Custom Block help page</a>.', [
                ':blockcontent-help' => $block_content,
            ]) . '</dd>';
            $output .= '</dl>';
            return $output;
    }
    if ($route_name == 'block.admin_display' || $route_name == 'block.admin_display_theme') {
        $demo_theme = $route_match->getParameter('theme') ?: \Drupal::config('system.theme')->get('default');
        $themes = \Drupal::service('theme_handler')->listInfo();
        $output = '<p>' . t('Block placement is specific to each theme on your site. Changes will not be saved until you click <em>Save blocks</em> at the bottom of the page.') . '</p>';
        $output .= '<p>' . Link::fromTextAndUrl(t('Demonstrate block regions (@theme)', [
            '@theme' => $themes[$demo_theme]->info['name'],
        ]), Url::fromRoute('block.admin_demo', [
            'theme' => $demo_theme,
        ]))
            ->toString() . '</p>';
        return $output;
    }
}