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<?php |
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namespace Xls; |
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use Xls\Record\AbstractRecord; |
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class BIFFwriter |
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{ |
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/** |
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* This flag indicates write to temporary buffer mode |
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* instead of $data |
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* @var bool |
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*/ |
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protected $bufferedWrite = false; |
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/** |
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* Temporary buffer |
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* @var string |
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*/ |
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protected $buffer = ''; |
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/** |
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* The string containing the data of the BIFF stream |
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* @var string |
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*/ |
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protected $data = ''; |
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/** |
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* The size of the data in bytes. Should be the same as strlen($this->data) |
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* But this is not true for Worksheet, cause it writes directly to file |
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* @var integer |
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*/ |
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protected $datasize = 0; |
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/** |
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* @param $data |
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* |
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* @return string |
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*/ |
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protected function addContinueIfNeeded($data) |
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{ |
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if (strlen($data) > Biff8::LIMIT) { |
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$data = $this->addContinue($data); |
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} |
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return $data; |
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} |
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/** |
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* @param string $data binary data to append |
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*/ |
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protected function append($data) |
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{ |
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$data = $this->addContinueIfNeeded($data); |
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$this->appendRaw($data); |
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} |
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/** |
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* @param string $data binary data to append |
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*/ |
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protected function appendRaw($data) |
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{ |
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if ($this->isBufferedWriteOn()) { |
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$this->buffer .= $data; |
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} else { |
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$this->data .= $data; |
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$this->datasize += strlen($data); |
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} |
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} |
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/** |
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* @param string $type |
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* @param array $params |
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*/ |
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protected function appendRecord($type, array $params = array()) |
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{ |
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$this->append($this->getRecord($type, $params)); |
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} |
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/** |
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* This function takes a long BIFF record and inserts CONTINUE records as |
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* necessary. |
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* |
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* @param string $data The original binary data to be written |
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* @return string Сonvenient string of continue blocks |
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*/ |
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protected function addContinue($data) |
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{ |
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return $this->getRecord('ContinueRecord', array($data)); |
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} |
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/** |
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* @return int |
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*/ |
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public function getDataSize() |
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{ |
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return $this->datasize; |
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} |
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/** |
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* @param string $type |
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* @param array $params |
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* |
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* @return mixed |
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*/ |
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protected function getRecord($type, array $params = array()) |
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{ |
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$record = $this->createRecord($type); |
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return call_user_func_array(array($record, 'getData'), $params); |
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} |
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/** |
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* @param $type |
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* |
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* @return AbstractRecord |
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*/ |
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protected function createRecord($type) |
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{ |
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$className = "\\Xls\\Record\\$type"; |
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return new $className(); |
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} |
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protected function isBufferedWriteOn() |
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{ |
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return $this->bufferedWrite; |
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} |
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protected function startBufferedWrite() |
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{ |
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$this->bufferedWrite = true; |
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$this->buffer = ''; |
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} |
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protected function endBufferedWrite() |
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{ |
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$this->bufferedWrite = false; |
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} |
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protected function getBuffer() |
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{ |
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return $this->buffer; |
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} |
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protected function getBufferSize() |
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{ |
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return strlen($this->buffer); |
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} |
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/** |
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* @return string |
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*/ |
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protected function getDataAndFlush() |
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{ |
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$data = $this->data; |
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$this->data = ''; |
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$this->datasize = 0; |
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return $data; |
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} |
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} |
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MAXakaWIZARD /
xls-writer
