/**
* Returns whether another worksheet exists after the current worksheet.
* The order is determined by the order of appearance in the [Content_Types].xml file.
*
* @param Worksheet|null $currentWorksheet The worksheet being currently read or null if reading has not started yet
* @param Worksheet[] $allWorksheets A list of all worksheets in the XLSX file. Must contain at least one worksheet
* @return bool Whether another worksheet exists after the current sheet
*/
public function hasNextWorksheet($currentWorksheet, $allWorksheets)
{
return $currentWorksheet === null || $currentWorksheet->getWorksheetIndex() + 1 < count($allWorksheets);
}
/**
* Initializes the XMLReader object that reads worksheet data for the given worksheet.
* If another worksheet was being read, it closes the reader before reopening it for the new worksheet.
* The XMLReader is configured to be safe from billion laughs attack.
*
* @param Internal\XLSX\Worksheet $worksheet The worksheet to initialize the XMLReader with
* @return void
* @throws \Box\Spout\Common\Exception\IOException If the worksheet data XML cannot be read
*/
protected function initXmlReaderForWorksheetData($worksheet)
{
// if changing worksheet and the XMLReader was initialized for the current worksheet
if ($worksheet != $this->currentWorksheet && $this->xmlReader) {
$this->xmlReader->close();
} else {
if (!$this->xmlReader) {
$this->xmlReader = new \XMLReader();
}
}
$worksheetDataXMLFilePath = $worksheet->getDataXmlFilePath();
$worksheetDataFilePath = 'zip://' . $this->filePath . '#' . $worksheetDataXMLFilePath;
if ($this->xmlReader->open($worksheetDataFilePath, null, LIBXML_NOENT | LIBXML_NONET) === false) {
throw new IOException('Could not open "' . $worksheetDataXMLFilePath . '".');
}
}
