function CKEditor5PluginManager::getProvidedElements

Overrides CKEditor5PluginManagerInterface::getProvidedElements

File

core/modules/ckeditor5/src/Plugin/CKEditor5PluginManager.php, line 347

Class

CKEditor5PluginManager

Provides a CKEditor 5 plugin manager.

Namespace

Code

public function getProvidedElements(array $plugin_ids = [], EditorInterface $editor = NULL, bool $resolve_wildcards = TRUE, bool $creatable_elements_only = FALSE) : array {
    $plugins = $this->getDefinitions();
    if (!empty($plugin_ids)) {
        $plugins = array_intersect_key($plugins, array_flip($plugin_ids));
    }
    $elements = HTMLRestrictions::emptySet();
    foreach ($plugins as $id => $definition) {
        // Some CKEditor 5 plugins only provide functionality, not additional
        // elements.
        if (!$definition->hasElements()) {
            continue;
        }
        $defined_elements = $definition->getElements();
        if (is_a($definition->getClass(), CKEditor5PluginElementsSubsetInterface::class, TRUE)) {
            // ckeditor5_sourceEditing is the edge case here: it is the only plugin
            // that is allowed to return a superset. It's a special case because it
            // is through configuring this particular plugin that additional HTML
            // tags can be allowed.
            // The list of tags it supports is generated dynamically. In its default
            // configuration it does support any HTML tags.
            if ($id === 'ckeditor5_sourceEditing') {
                $defined_elements = !isset($editor) ? [] : $this->getPlugin($id, $editor)
                    ->getElementsSubset();
            }
            elseif (isset($editor)) {
                $subset = $this->getPlugin($id, $editor)
                    ->getElementsSubset();
                $subset_restrictions = HTMLRestrictions::fromString(implode($subset));
                $defined_restrictions = HTMLRestrictions::fromString(implode($defined_elements));
                // Determine max supported elements by resolving wildcards in the
                // restrictions defined by the plugin.
                $max_supported = $defined_restrictions;
                if (!$defined_restrictions->getWildcardSubset()
                    ->allowsNothing()) {
                    $concrete_tags_to_use_to_resolve_wildcards = $subset_restrictions->extractPlainTagsSubset();
                    $max_supported = $max_supported->merge($concrete_tags_to_use_to_resolve_wildcards)
                        ->diff($concrete_tags_to_use_to_resolve_wildcards);
                }
                $not_in_max_supported = $subset_restrictions->diff($max_supported);
                if (!$not_in_max_supported->allowsNothing()) {
                    // If the editor is still being configured, the configuration may
                    // not yet be valid.
                    if ($editor->isNew()) {
                        $subset = [];
                    }
                    else {
                        throw new \LogicException(sprintf('The "%s" CKEditor 5 plugin implements ::getElementsSubset() and did not return a subset, the following tags are absent from the plugin definition: "%s".', $id, implode(' ', $not_in_max_supported->toCKEditor5ElementsArray())));
                    }
                }
                // Also detect what is technically a valid subset, but has lost the
                // ability to create tags that are still in the subset. This points to
                // a bug in the plugin's ::getElementsSubset() logic.
                $defined_creatable = HTMLRestrictions::fromString(implode($definition->getCreatableElements()));
                $subset_creatable_actual = HTMLRestrictions::fromString(implode(array_filter($subset, [
                    CKEditor5PluginDefinition::class,
                    'isCreatableElement',
                ])));
                $subset_creatable_needed = $subset_restrictions->extractPlainTagsSubset()
                    ->intersect($defined_creatable);
                $missing_creatable_for_subset = $subset_creatable_needed->diff($subset_creatable_actual);
                if (!$missing_creatable_for_subset->allowsNothing()) {
                    throw new \LogicException(sprintf('The "%s" CKEditor 5 plugin implements ::getElementsSubset() and did return a subset ("%s") but the following tags can no longer be created: "%s".', $id, implode($subset_restrictions->toCKEditor5ElementsArray()), implode($missing_creatable_for_subset->toCKEditor5ElementsArray())));
                }
                $defined_elements = $subset;
            }
        }
        assert(Inspector::assertAllStrings($defined_elements));
        if ($creatable_elements_only) {
            // @see \Drupal\ckeditor5\Plugin\CKEditor5PluginDefinition::getCreatableElements()
            $defined_elements = array_filter($defined_elements, [
                CKEditor5PluginDefinition::class,
                'isCreatableElement',
            ]);
        }
        foreach ($defined_elements as $element) {
            $additional_elements = HTMLRestrictions::fromString($element);
            $elements = $elements->merge($additional_elements);
        }
    }
    return $elements->getAllowedElements($resolve_wildcards);
}