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<?php |
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/** |
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* @author neun |
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* @since 2016-07-11 |
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*/ |
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namespace OneSheet; |
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/** |
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* Class DefaultCellBuilder to build xml cell strings. |
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* Wheter a numeric value is written as a number or string type cell |
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* is simply determined by type, to allow for some control by typecasting. |
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* (Premature) performance considerations (50.000 rows x 15 columns): |
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* - sprintf 8.3s |
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* - '<c>' . $value . '</c>' 8.1s |
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* - "<c>{$value}</c>" 7.9s |
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* @package OneSheet |
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*/ |
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class DefaultCellBuilder implements CellBuilderInterface |
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{ |
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/** |
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* A-Z character array to build cell ids. |
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* |
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* @var array |
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*/ |
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private $characters = array(); |
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/** |
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* Array of control characters that should be escaped. |
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* |
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* @var array |
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*/ |
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private $controlCharacters = array(); |
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/** |
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* Array of escape characters to replace control characters. |
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* |
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* @var array |
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*/ |
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private $escapeCharacters = array(); |
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/** |
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* CellBuilder constructor to instantiate character properties. |
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*/ |
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public function __construct() |
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{ |
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$this->characters = range('A', 'Z'); |
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foreach(range(chr(0), chr(31)) as $key => $char) { |
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if (!in_array($char, array("\n", "\r", "\t"))) { |
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$this->controlCharacters[] = $char; |
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$this->escapeCharacters[] = sprintf('_x%04s_', strtoupper(dechex($key))); |
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} |
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} |
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} |
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/** |
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* Build and return the string for a single cell. |
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* |
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* @param int $rowNumber |
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* @param int $cellNumber |
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* @param string $value |
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* @param int $styleId |
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* @return string |
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*/ |
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public function build($rowNumber, $cellNumber, $value, $styleId = 0) |
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{ |
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$cellId = $this->getCellId($cellNumber, $rowNumber); |
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if (is_int($value) || is_double($value)) { |
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return sprintf(CellXml::NUMBER_XML, $cellId, $styleId, $value); |
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} elseif (is_bool($value)) { |
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return sprintf(CellXml::BOOLEAN_XML, $cellId, $styleId, (int)$value); |
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} elseif (is_numeric($value) || $this->isWordCharacter($value)) { |
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return sprintf(CellXml::STRING_XML, $cellId, $styleId, htmlspecialchars($value)); |
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} else { |
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return sprintf(CellXml::STRING_XML, $cellId, $styleId, $this->escapeControlCharacters($value)); |
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} |
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} |
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/** |
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* Turn a integer cell number + row number into a valid cell identifier |
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* like e.g. A1, Z1, AA1 etc and return it. |
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* |
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* @param int $cellNumber |
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* @param int|null $rowNumber |
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* @return string |
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*/ |
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private function getCellId($cellNumber, $rowNumber = null) |
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{ |
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if ($cellNumber / 26 < 1) { |
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return $this->characters[$cellNumber] . $rowNumber; |
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} |
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return $this->getCellId(floor($cellNumber / 26) - 1) . $this->characters[$cellNumber % 26] . $rowNumber; |
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} |
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/** |
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* Determine if the string requires additional escaping. |
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* |
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* @param string $value |
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* @return bool |
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*/ |
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private function isWordCharacter($value) |
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{ |
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return 1 != preg_match('~[^\w]~', $value); |
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} |
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/** |
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* Replace control characters with escape characters. |
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* |
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* @param string $value |
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* @return string |
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*/ |
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private function escapeControlCharacters($value) |
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{ |
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return str_replace($this->controlCharacters, $this->escapeCharacters, htmlspecialchars($value, ENT_QUOTES)); |
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} |
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} |
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nimmneun /
onesheet
