function Core::mapCKEditor4ToolbarButtonToCKEditor5ToolbarItem

Overrides CKEditor4To5UpgradePluginInterface::mapCKEditor4ToolbarButtonToCKEditor5ToolbarItem

File

core/modules/ckeditor5/src/Plugin/CKEditor4To5Upgrade/Core.php, line 78

Class

Core

Provides the CKEditor 4 to 5 upgrade for Drupal core's CKEditor plugins.

Namespace

Code

public function mapCKEditor4ToolbarButtonToCKEditor5ToolbarItem(string $cke4_button, HTMLRestrictions $text_format_html_restrictions) : ?array {
    static $alignment_mapped;
    switch ($cke4_button) {
        // @see \Drupal\ckeditor\Plugin\CKEditorPlugin\DrupalImage
        case 'DrupalImage':
            return [
                'drupalInsertImage',
            ];
        // @see \Drupal\ckeditor\Plugin\CKEditorPlugin\DrupalLink
        case 'DrupalLink':
            return [
                'link',
            ];
        case 'DrupalUnlink':
            return NULL;
        // @see \Drupal\ckeditor\Plugin\CKEditorPlugin\Internal
        case 'Bold':
        case 'Italic':
        case 'Underline':
        case 'Superscript':
        case 'Subscript':
        case 'BulletedList':
        case 'NumberedList':
        case 'Outdent':
        case 'Indent':
        case 'Undo':
        case 'Redo':
            return [
                lcfirst($cke4_button),
            ];
        case 'Blockquote':
            return [
                'blockQuote',
            ];
        case 'JustifyLeft':
        case 'JustifyCenter':
        case 'JustifyRight':
        case 'JustifyBlock':
            if (!isset($alignment_mapped)) {
                $alignment_mapped = TRUE;
                return [
                    'alignment',
                ];
            }
            return NULL;
        case 'HorizontalRule':
            return [
                'horizontalLine',
            ];
        case 'Format':
            if ($text_format_html_restrictions->isUnrestricted()) {
                // When no restrictions exist, all tags possibly supported by "Format"
                // in CKEditor 4 must be supported.
                return [
                    'heading',
                    'codeBlock',
                ];
            }
            $allowed_elements = $text_format_html_restrictions->getAllowedElements();
            // Check if <h*> is supported.
            // Merely checking the existence of the array key is sufficient; this
            // plugin does not set or need any additional attributes.
            // @see \Drupal\filter\Plugin\FilterInterface::getHTMLRestrictions()
            $intersect = array_intersect([
                'h2',
                'h3',
                'h4',
                'h5',
                'h6',
            ], array_keys($allowed_elements));
            // Do not return the 'codeBlock' toolbar item, not even when `<pre>` is
            // allowed in the text format. This ensures that SmartDefaultSettings:
            // - first adds the `code` toolbar item (for inline `<code>`)
            // - then adds `codeBlock` toolbar item (for code blocks: `<pre><code>`)
            // @see https://www.drupal.org/project/drupal/issues/3263384#comment-14446315
            return count($intersect) > 0 ? [
                'heading',
            ] : NULL;
        case 'Table':
            return [
                'insertTable',
            ];
        case 'Source':
            return [
                'sourceEditing',
            ];
        case 'Strike':
            return [
                'strikethrough',
            ];
        case 'Cut':
        case 'Copy':
        case 'Paste':
        case 'PasteText':
        case 'PasteFromWord':
        case 'Maximize':
        case '-':
            // @see https://www.drupal.org/project/ckeditor5/issues/3211049#comment-14167764
            return NULL;
        case 'ShowBlocks':
            return [
                'showBlocks',
            ];
        // @see \Drupal\ckeditor5\Plugin\CKEditor5Plugin\RemoveFormat
        case 'RemoveFormat':
            return [
                'removeFormat',
            ];
        // @see \Drupal\ckeditor\Plugin\CKEditorPlugin\StylesCombo
        case 'Styles':
            return [
                'style',
            ];
        // @see \Drupal\ckeditor5\Plugin\CKEditor5Plugin\specialCharacters
        case 'SpecialChar':
            return [
                'specialCharacters',
            ];
        // @see \Drupal\ckeditor\Plugin\CKEditorPlugin\Language
        case 'Language':
            return [
                'textPartLanguage',
            ];
        // @see \Drupal\media_library\Plugin\CKEditorPlugin\DrupalMediaLibrary
        case 'DrupalMediaLibrary':
            return [
                'drupalMedia',
            ];
        default:
            throw new \OutOfBoundsException();
    }
}