PhpOffice\PhpPresentation\Reader\PowerPoint97::readRecordShapeProgTagsContainer PHP Method

    private function readRecordShapeProgTagsContainer($stream, $pos)
    {
        $arrayReturn = array('length' => 0);
        $data = $this->loadRecordHeader($stream, $pos);
        if ($data['recVer'] == 0xf && $data['recInstance'] == 0x0 && $data['recType'] == self::RT_PROGTAGS) {
            // Record Header
            $arrayReturn['length'] += 8;
            $length = 0;
            do {
                $dataHeaderRG = $this->loadRecordHeader($stream, $pos + $arrayReturn['length'] + $length);
                switch ($dataHeaderRG['recType']) {
                    case self::RT_PROGBINARYTAG:
                        $dataRG = $this->readRecordShapeProgBinaryTagContainer($stream, $pos + $arrayReturn['length'] + $length);
                        $length += $dataRG['length'];
                        break;
                        //case self::RT_PROGSTRINGTAG:
                    //case self::RT_PROGSTRINGTAG:
                    default:
                        throw new \Exception('Feature not implemented (l.' . __LINE__ . ')');
                }
            } while ($length < $data['recLen']);
            // Datas
            $arrayReturn['length'] += $data['recLen'];
        }
        return $arrayReturn;
    }