/**
* Reads the styles.xml file and extract the relevant information from the file.
*
* @return void
*/
protected function extractRelevantInfo()
{
$this->customNumberFormats = [];
$this->stylesAttributes = [];
$xmlReader = new XMLReader();
if ($xmlReader->openFileInZip($this->filePath, self::STYLES_XML_FILE_PATH)) {
while ($xmlReader->read()) {
if ($xmlReader->isPositionedOnStartingNode(self::XML_NODE_NUM_FMTS)) {
$numFmtsNode = new SimpleXMLElement($xmlReader->readOuterXml());
$this->extractNumberFormats($numFmtsNode);
} else {
if ($xmlReader->isPositionedOnStartingNode(self::XML_NODE_CELL_XFS)) {
$cellXfsNode = new SimpleXMLElement($xmlReader->readOuterXml());
$this->extractStyleAttributes($cellXfsNode);
}
}
}
$xmlReader->close();
}
}
/**
* Returns a SimpleXMLElement node from the current node in the given XMLReader instance.
* This is to simplify the parsing of the subtree.
*
* @param \Box\Spout\Reader\Wrapper\XMLReader $xmlReader
* @return \Box\Spout\Reader\Wrapper\SimpleXMLElement
* @throws \Box\Spout\Common\Exception\IOException If the current node cannot be read
*/
protected function getSimpleXmlElementNodeFromXMLReader($xmlReader)
{
$node = null;
try {
$node = new SimpleXMLElement($xmlReader->readOuterXml());
} catch (XMLProcessingException $exception) {
throw new IOException("The sharedStrings.xml file contains unreadable data [{$exception->getMessage()}].");
}
return $node;
}
