/** Quickly scan the spreads to determine how many pages are in this package. This is suitable for use
* by IdmlAssembler::preparation(), but not by IdmlAssembler::assembler().
*
* @return int $pageCount
*/
public function determinePageCount()
{
$pageCount = 0;
// The designmap contains references to everything in the package
$designmap = $this->tempDir . '/designmap.xml';
if (!file_exists($designmap)) {
$this->idmlAssembler->getProgressUpdater()->setWarning("{$designmap} does not exist.");
return false;
}
// create DOMDocument and DOMXPath objects
$doc = new DomDocument();
$b = $doc->load($designmap);
if ($b === false) {
return false;
}
$xpath = new DOMXPath($doc);
// There are most likely many Spread files, and they are ordered in the designmap
// according to the book's page ordering.
$tags = $xpath->query('//idPkg:Spread');
foreach ($tags as $tag) {
$attr = $tag->attributes->getNamedItem('src');
$filename = "{$this->tempDir}/{$attr->value}";
$obj = new IdmlSpread($this);
$pageCount += $obj->determinePageCount($filename);
}
return $pageCount;
}
/** The constructor
* @param IdmlPackage $idmlPackage is the parent object
*/
public function __construct($idmlPackage)
{
parent::__construct($idmlPackage);
$this->xmlRootName = 'MasterSpread';
}
