Same name and namespace in other branches

1. 9 core/modules/book/src/BookExport.php \Drupal\book\BookExport::bookExportHtml()
2. 8.9.x core/modules/book/src/BookExport.php \Drupal\book\BookExport::bookExportHtml()
3. 10 core/modules/book/src/BookExport.php \Drupal\book\BookExport::bookExportHtml()

Generates HTML for export when invoked by book_export().

The given node is embedded to its absolute depth in a top level section. For example, a child node with depth 2 in the hierarchy is contained in (otherwise empty) <div> elements corresponding to depth 0 and depth 1. This is intended to support WYSIWYG output; for instance, level 3 sections always look like level 3 sections, no matter their depth relative to the node selected to be exported as printer-friendly HTML.

Parameters

\Drupal\node\NodeInterface $node: The node to export.

Return value

array A render array representing the HTML for a node and its children in the book hierarchy.

Throws

\Exception Thrown when the node was not attached to a book.

File

core/modules/book/src/BookExport.php, line 81

Class

BookExport

Provides methods for exporting book to different formats.

Namespace

Drupal\book

Code

public function bookExportHtml(NodeInterface $node) {
    if (!isset($node->book)) {
        throw new \Exception();
    }
    $tree = $this->bookManager
        ->bookSubtreeData($node->book);
    $contents = $this->exportTraverse($tree, [
        $this,
        'bookNodeExport',
    ]);
    $node = $this->entityRepository
        ->getTranslationFromContext($node);
    return [
        '#theme' => 'book_export_html',
        '#title' => $node->label(),
        '#contents' => $contents,
        '#depth' => $node->book['depth'],
        '#cache' => [
            'tags' => $node->getEntityType()
                ->getListCacheTags(),
        ],
    ];
}

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