protected function getGraphicsContextFromSourceDocument(Document $document)
{
$fileOfSourcePage = $this->getAttribute('document-template');
if ($fileOfSourcePage) {
$engine = $document->loadEngine($fileOfSourcePage, $this->getEncoding());
$graphicsContexts = $engine->getAttachedGraphicsContexts();
$count = count($graphicsContexts);
if ($count == 0) {
return null;
}
$pageContext = $this->context;
$index = ($pageContext ? $pageContext->getPageNumber() - 1 : 0) % $count;
return $graphicsContexts[$index];
}
return null;
}
