settings_tray.module

<?php


/**
 * @file
 * Allows configuring blocks and other configuration from the site front-end.
 */
use Drupal\Core\Url;
use Drupal\Core\Asset\AttachedAssetsInterface;
use Drupal\Core\Routing\RouteMatchInterface;
use Drupal\block\entity\Block;
use Drupal\block\BlockInterface;
use Drupal\settings_tray\Block\BlockEntitySettingTrayForm;

/**
 * Implements hook_help().
 */
function settings_tray_help($route_name, RouteMatchInterface $route_match) {
    switch ($route_name) {
        case 'help.page.settings_tray':
            $output = '<h3>' . t('About') . '</h3>';
            $output .= '<p>' . t('The Settings Tray module allows users with the <a href=":administer_block_permission">Administer blocks</a> and <a href=":contextual_permission">Use contextual links</a> permissions to edit blocks without visiting a separate page. For more information, see the <a href=":handbook_url">online documentation for the Settings Tray module</a>.', [
                ':handbook_url' => 'https://www.drupal.org/documentation/modules/settings_tray',
                ':administer_block_permission' => Url::fromRoute('user.admin_permissions', [], [
                    'fragment' => 'module-block',
                ])->toString(),
                ':contextual_permission' => Url::fromRoute('user.admin_permissions', [], [
                    'fragment' => 'module-contextual',
                ])->toString(),
            ]) . '</p>';
            $output .= '<h3>' . t('Uses') . '</h3>';
            $output .= '<dl>';
            $output .= '<dt>' . t('Editing blocks in place') . '</dt>';
            $output .= '<dd>';
            $output .= '<p>' . t('To edit blocks in place, either click the <strong>Edit</strong> button in the toolbar and then click on the block, or choose "Quick edit" from the block\'s contextual link. (See the <a href=":contextual">Contextual Links module help</a> for more information about how to use contextual links.)', [
                ':contextual' => Url::fromRoute('help.page', [
                    'name' => 'contextual',
                ])->toString(),
            ]) . '</p>';
            $output .= '<p>' . t('The Settings Tray for the block will open in a sidebar, with a compact form for configuring what the block shows.') . '</p>';
            $output .= '<p>' . t('Save the form and the changes will be immediately visible on the page.') . '</p>';
            $output .= '</dd>';
            $output .= '</dl>';
            return [
                '#markup' => $output,
            ];
    }
}

/**
 * Implements hook_contextual_links_view_alter().
 *
 * Change Configure Blocks into off_canvas links.
 */
function settings_tray_contextual_links_view_alter(&$element, $items) {
    if (isset($element['#links']['settings-trayblock-configure'])) {
        // Place settings_tray link first.
        $settings_tray_link = $element['#links']['settings-trayblock-configure'];
        unset($element['#links']['settings-trayblock-configure']);
        $element['#links'] = [
            'settings-trayblock-configure' => $settings_tray_link,
        ] + $element['#links'];
        // If this is content block change title to avoid duplicate "Quick Edit".
        if (isset($element['#links']['block-contentblock-edit'])) {
            $element['#links']['settings-trayblock-configure']['title'] = t('Quick edit settings');
        }
        $element['#attached']['library'][] = 'core/drupal.dialog.off_canvas';
    }
}

/**
 * Checks if a block has overrides.
 *
 * @param \Drupal\block\BlockInterface $block
 *   The block to check for overrides.
 *
 * @return bool
 *   TRUE if the block has overrides otherwise FALSE.
 *
 * @internal
 */
function _settings_tray_has_block_overrides(BlockInterface $block) {
    // @todo Replace the following with $block->hasOverrides() in https://www.drupal.org/project/drupal/issues/2910353
    //   and remove this function.
    return \Drupal::config($block->getEntityType()
        ->getConfigPrefix() . '.' . $block->id())
        ->hasOverrides();
}

/**
 * Implements hook_block_view_alter().
 */
function settings_tray_block_view_alter(array &$build) {
    if (isset($build['#contextual_links']['block'])) {
        // Ensure that contextual links vary by whether the block has config overrides
        // or not.
        // @see _contextual_links_to_id()
        $build['#contextual_links']['block']['metadata']['has_overrides'] = _settings_tray_has_block_overrides($build['#block']) ? 1 : 0;
    }
    // Force a new 'data-contextual-id' attribute on blocks when this module is
    // enabled so as not to reuse stale data cached client-side.
    // @todo Remove when https://www.drupal.org/node/2773591 is fixed.
    $build['#contextual_links']['settings_tray'] = [
        'route_parameters' => [],
    ];
}

/**
 * Implements hook_entity_type_build().
 */
function settings_tray_entity_type_build(array &$entity_types) {
    
    /* @var $entity_types \Drupal\Core\Entity\EntityTypeInterface[] */
    $entity_types['block']->setFormClass('settings_tray', BlockEntitySettingTrayForm::class)
        ->setLinkTemplate('settings_tray-form', '/admin/structure/block/manage/{block}/settings-tray');
}

/**
 * Implements hook_preprocess_HOOK() for block templates.
 */
function settings_tray_preprocess_block(&$variables) {
    // Only blocks that have a settings_tray form and have no configuration
    // overrides will have a "Quick Edit" link. We could wait for the contextual
    // links to be initialized on the client side,  and then add the class and
    // data- attribute below there (via JavaScript). But that would mean that it
    // would be impossible to show Settings Tray's clickable regions immediately
    // when the page loads. When latency is high, this will cause flicker.
    // @see \Drupal\settings_tray\Access\BlockPluginHasSettingsTrayFormAccessCheck
    
    /** @var \Drupal\settings_tray\Access\BlockPluginHasSettingsTrayFormAccessCheck $access_checker */
    $access_checker = \Drupal::service('access_check.settings_tray.block.settings_tray_form');
    
    /** @var \Drupal\Core\Block\BlockManagerInterface $block_plugin_manager */
    $block_plugin_manager = \Drupal::service('plugin.manager.block');
    
    /** @var \Drupal\Core\Block\BlockPluginInterface $block_plugin */
    $block_plugin = $block_plugin_manager->createInstance($variables['plugin_id']);
    if (isset($variables['elements']['#contextual_links']['block']['route_parameters']['block'])) {
        $block = Block::load($variables['elements']['#contextual_links']['block']['route_parameters']['block']);
        if ($access_checker->accessBlockPlugin($block_plugin)
            ->isAllowed() && !_settings_tray_has_block_overrides($block)) {
            // Add class and attributes to all blocks to allow Javascript to target.
            $variables['attributes']['class'][] = 'settings-tray-editable';
            $variables['attributes']['data-drupal-settingstray'] = 'editable';
        }
    }
}

/**
 * Implements hook_toolbar_alter().
 *
 * Alters the 'contextual' toolbar tab if it exists (meaning the user is allowed
 * to use contextual links) and if they can administer blocks.
 *
 * @todo Remove the "administer blocks" requirement in
 *   https://www.drupal.org/node/2822965.
 *
 * @see contextual_toolbar()
 */
function settings_tray_toolbar_alter(&$items) {
    $items['contextual']['#cache']['contexts'][] = 'user.permissions';
    if (isset($items['contextual']['tab']) && \Drupal::currentUser()->hasPermission('administer blocks')) {
        $items['contextual']['#weight'] = -1000;
        $items['contextual']['#attached']['library'][] = 'settings_tray/drupal.settings_tray';
        $items['contextual']['tab']['#attributes']['data-drupal-settingstray'] = 'toggle';
        // Set a class on items to mark whether they should be active in edit mode.
        // @todo Create a dynamic method for modules to set their own items.
        //   https://www.drupal.org/node/2784589.
        $edit_mode_items = [
            'contextual',
            'block_place',
        ];
        foreach ($items as $key => $item) {
            if (!in_array($key, $edit_mode_items) && (!isset($items[$key]['#wrapper_attributes']['class']) || !in_array('hidden', $items[$key]['#wrapper_attributes']['class']))) {
                $items[$key]['#wrapper_attributes']['class'][] = 'edit-mode-inactive';
            }
        }
    }
}

/**
 * Implements hook_block_alter().
 *
 * Ensures every block plugin definition has an 'settings_tray' form specified.
 *
 * @see \Drupal\settings_tray\Access\BlockPluginHasSettingsTrayFormAccessCheck
 */
function settings_tray_block_alter(&$definitions) {
    foreach ($definitions as &$definition) {
        // If a block plugin does not define its own 'settings_tray' form, use the
        // plugin class itself.
        if (!isset($definition['forms']['settings_tray'])) {
            $definition['forms']['settings_tray'] = $definition['class'];
        }
    }
}

/**
 * Implements hook_css_alter().
 */
function settings_tray_css_alter(&$css, AttachedAssetsInterface $assets) {
    // @todo Remove once conditional ordering is introduced in
    //   https://www.drupal.org/node/1945262.
    $path = drupal_get_path('module', 'settings_tray') . '/css/settings_tray.theme.css';
    if (isset($css[$path])) {
        // Use 200 to come after CSS_AGGREGATE_THEME.
        $css[$path]['group'] = 200;
    }
}