287 lines
9.8 KiB
PHP
287 lines
9.8 KiB
PHP
<?php
|
|
|
|
namespace Box\Spout\Reader\XLSX\Helper;
|
|
|
|
use Box\Spout\Reader\Wrapper\XMLReader;
|
|
|
|
/**
|
|
* Class StyleHelper
|
|
* This class provides helper functions related to XLSX styles
|
|
*
|
|
* @package Box\Spout\Reader\XLSX\Helper
|
|
*/
|
|
class StyleHelper
|
|
{
|
|
/** Paths of XML files relative to the XLSX file root */
|
|
const STYLES_XML_FILE_PATH = 'xl/styles.xml';
|
|
|
|
/** Nodes used to find relevant information in the styles XML file */
|
|
const XML_NODE_NUM_FMTS = 'numFmts';
|
|
const XML_NODE_NUM_FMT = 'numFmt';
|
|
const XML_NODE_CELL_XFS = 'cellXfs';
|
|
const XML_NODE_XF = 'xf';
|
|
|
|
/** Attributes used to find relevant information in the styles XML file */
|
|
const XML_ATTRIBUTE_NUM_FMT_ID = 'numFmtId';
|
|
const XML_ATTRIBUTE_FORMAT_CODE = 'formatCode';
|
|
const XML_ATTRIBUTE_APPLY_NUMBER_FORMAT = 'applyNumberFormat';
|
|
|
|
/** By convention, default style ID is 0 */
|
|
const DEFAULT_STYLE_ID = 0;
|
|
|
|
/**
|
|
* @see https://msdn.microsoft.com/en-us/library/ff529597(v=office.12).aspx
|
|
* @var array Mapping between built-in numFmtId and the associated format - for dates only
|
|
*/
|
|
protected static $builtinNumFmtIdToNumFormatMapping = [
|
|
14 => 'm/d/yyyy', // @NOTE: ECMA spec is 'mm-dd-yy'
|
|
15 => 'd-mmm-yy',
|
|
16 => 'd-mmm',
|
|
17 => 'mmm-yy',
|
|
18 => 'h:mm AM/PM',
|
|
19 => 'h:mm:ss AM/PM',
|
|
20 => 'h:mm',
|
|
21 => 'h:mm:ss',
|
|
22 => 'm/d/yyyy h:mm', // @NOTE: ECMA spec is 'm/d/yy h:mm',
|
|
45 => 'mm:ss',
|
|
46 => '[h]:mm:ss',
|
|
47 => 'mm:ss.0', // @NOTE: ECMA spec is 'mmss.0',
|
|
];
|
|
|
|
/** @var string Path of the XLSX file being read */
|
|
protected $filePath;
|
|
|
|
/** @var array Array containing a mapping NUM_FMT_ID => FORMAT_CODE */
|
|
protected $customNumberFormats;
|
|
|
|
/** @var array Array containing a mapping STYLE_ID => [STYLE_ATTRIBUTES] */
|
|
protected $stylesAttributes;
|
|
|
|
/**
|
|
* @param string $filePath Path of the XLSX file being read
|
|
*/
|
|
public function __construct($filePath)
|
|
{
|
|
$this->filePath = $filePath;
|
|
}
|
|
|
|
/**
|
|
* 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)) {
|
|
$this->extractNumberFormats($xmlReader);
|
|
|
|
} else if ($xmlReader->isPositionedOnStartingNode(self::XML_NODE_CELL_XFS)) {
|
|
$this->extractStyleAttributes($xmlReader);
|
|
}
|
|
}
|
|
|
|
$xmlReader->close();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Extracts number formats from the "numFmt" nodes.
|
|
* For simplicity, the styles attributes are kept in memory. This is possible thanks
|
|
* to the reuse of formats. So 1 million cells should not use 1 million formats.
|
|
*
|
|
* @param \Box\Spout\Reader\Wrapper\XMLReader $xmlReader XML Reader positioned on the "numFmts" node
|
|
* @return void
|
|
*/
|
|
protected function extractNumberFormats($xmlReader)
|
|
{
|
|
while ($xmlReader->read()) {
|
|
if ($xmlReader->isPositionedOnStartingNode(self::XML_NODE_NUM_FMT)) {
|
|
$numFmtId = intval($xmlReader->getAttribute(self::XML_ATTRIBUTE_NUM_FMT_ID));
|
|
$formatCode = $xmlReader->getAttribute(self::XML_ATTRIBUTE_FORMAT_CODE);
|
|
$this->customNumberFormats[$numFmtId] = $formatCode;
|
|
} else if ($xmlReader->isPositionedOnEndingNode(self::XML_NODE_NUM_FMTS)) {
|
|
// Once done reading "numFmts" node's children
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Extracts style attributes from the "xf" nodes, inside the "cellXfs" section.
|
|
* For simplicity, the styles attributes are kept in memory. This is possible thanks
|
|
* to the reuse of styles. So 1 million cells should not use 1 million styles.
|
|
*
|
|
* @param \Box\Spout\Reader\Wrapper\XMLReader $xmlReader XML Reader positioned on the "cellXfs" node
|
|
* @return void
|
|
*/
|
|
protected function extractStyleAttributes($xmlReader)
|
|
{
|
|
while ($xmlReader->read()) {
|
|
if ($xmlReader->isPositionedOnStartingNode(self::XML_NODE_XF)) {
|
|
$this->stylesAttributes[] = [
|
|
self::XML_ATTRIBUTE_NUM_FMT_ID => intval($xmlReader->getAttribute(self::XML_ATTRIBUTE_NUM_FMT_ID)),
|
|
self::XML_ATTRIBUTE_APPLY_NUMBER_FORMAT => !!($xmlReader->getAttribute(self::XML_ATTRIBUTE_APPLY_NUMBER_FORMAT)),
|
|
];
|
|
} else if ($xmlReader->isPositionedOnEndingNode(self::XML_NODE_CELL_XFS)) {
|
|
// Once done reading "cellXfs" node's children
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @return array The custom number formats
|
|
*/
|
|
protected function getCustomNumberFormats()
|
|
{
|
|
if (!isset($this->customNumberFormats)) {
|
|
$this->extractRelevantInfo();
|
|
}
|
|
|
|
return $this->customNumberFormats;
|
|
}
|
|
|
|
/**
|
|
* @return array The styles attributes
|
|
*/
|
|
protected function getStylesAttributes()
|
|
{
|
|
if (!isset($this->stylesAttributes)) {
|
|
$this->extractRelevantInfo();
|
|
}
|
|
|
|
return $this->stylesAttributes;
|
|
}
|
|
|
|
/**
|
|
* Returns whether the style with the given ID should consider
|
|
* numeric values as timestamps and format the cell as a date.
|
|
*
|
|
* @param int $styleId Zero-based style ID
|
|
* @return bool Whether the cell with the given cell should display a date instead of a numeric value
|
|
*/
|
|
public function shouldFormatNumericValueAsDate($styleId)
|
|
{
|
|
$stylesAttributes = $this->getStylesAttributes();
|
|
|
|
// Default style (0) does not format numeric values as timestamps. Only custom styles do.
|
|
// Also if the style ID does not exist in the styles.xml file, format as numeric value.
|
|
// Using isset here because it is way faster than array_key_exists...
|
|
if ($styleId === self::DEFAULT_STYLE_ID || !isset($stylesAttributes[$styleId])) {
|
|
return false;
|
|
}
|
|
|
|
$styleAttributes = $stylesAttributes[$styleId];
|
|
|
|
$applyNumberFormat = $styleAttributes[self::XML_ATTRIBUTE_APPLY_NUMBER_FORMAT];
|
|
if (!$applyNumberFormat) {
|
|
return false;
|
|
}
|
|
|
|
$numFmtId = $styleAttributes[self::XML_ATTRIBUTE_NUM_FMT_ID];
|
|
return $this->doesNumFmtIdIndicateDate($numFmtId);
|
|
}
|
|
|
|
/**
|
|
* @param int $numFmtId
|
|
* @return bool Whether the number format ID indicates that the number is a timestamp
|
|
*/
|
|
protected function doesNumFmtIdIndicateDate($numFmtId)
|
|
{
|
|
return (
|
|
!$this->doesNumFmtIdIndicateGeneralFormat($numFmtId) &&
|
|
(
|
|
$this->isNumFmtIdBuiltInDateFormat($numFmtId) ||
|
|
$this->isNumFmtIdCustomDateFormat($numFmtId)
|
|
)
|
|
);
|
|
}
|
|
|
|
/**
|
|
* @param int $numFmtId
|
|
* @return bool Whether the number format ID indicates the "General" format (0 by convention)
|
|
*/
|
|
protected function doesNumFmtIdIndicateGeneralFormat($numFmtId)
|
|
{
|
|
return ($numFmtId === 0);
|
|
}
|
|
|
|
/**
|
|
* @param int $numFmtId
|
|
* @return bool Whether the number format ID indicates that the number is a timestamp
|
|
*/
|
|
protected function isNumFmtIdBuiltInDateFormat($numFmtId)
|
|
{
|
|
$builtInDateFormatIds = array_keys(self::$builtinNumFmtIdToNumFormatMapping);
|
|
return in_array($numFmtId, $builtInDateFormatIds);
|
|
}
|
|
|
|
/**
|
|
* @param int $numFmtId
|
|
* @return bool Whether the number format ID indicates that the number is a timestamp
|
|
*/
|
|
protected function isNumFmtIdCustomDateFormat($numFmtId)
|
|
{
|
|
$customNumberFormats = $this->getCustomNumberFormats();
|
|
|
|
// Using isset here because it is way faster than array_key_exists...
|
|
if (!isset($customNumberFormats[$numFmtId])) {
|
|
return false;
|
|
}
|
|
|
|
$customNumberFormat = $customNumberFormats[$numFmtId];
|
|
|
|
// Remove extra formatting (what's between [ ], the brackets should not be preceded by a "\")
|
|
$pattern = '((?<!\\\)\[.+?(?<!\\\)\])';
|
|
$customNumberFormat = preg_replace($pattern, '', $customNumberFormat);
|
|
|
|
// custom date formats contain specific characters to represent the date:
|
|
// e - yy - m - d - h - s
|
|
// and all of their variants (yyyy - mm - dd...)
|
|
$dateFormatCharacters = ['e', 'yy', 'm', 'd', 'h', 's'];
|
|
|
|
$hasFoundDateFormatCharacter = false;
|
|
foreach ($dateFormatCharacters as $dateFormatCharacter) {
|
|
// character not preceded by "\"
|
|
$pattern = '/(?<!\\\)' . $dateFormatCharacter . '/';
|
|
|
|
if (preg_match($pattern, $customNumberFormat)) {
|
|
$hasFoundDateFormatCharacter = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return $hasFoundDateFormatCharacter;
|
|
}
|
|
|
|
/**
|
|
* Returns the format as defined in "styles.xml" of the given style.
|
|
* NOTE: It is assumed that the style DOES have a number format associated to it.
|
|
*
|
|
* @param int $styleId Zero-based style ID
|
|
* @return string The number format associated with the given style
|
|
*/
|
|
public function getNumberFormat($styleId)
|
|
{
|
|
$stylesAttributes = $this->getStylesAttributes();
|
|
$styleAttributes = $stylesAttributes[$styleId];
|
|
$numFmtId = $styleAttributes[self::XML_ATTRIBUTE_NUM_FMT_ID];
|
|
|
|
if ($this->isNumFmtIdBuiltInDateFormat($numFmtId)) {
|
|
$numberFormat = self::$builtinNumFmtIdToNumFormatMapping[$numFmtId];
|
|
} else {
|
|
$customNumberFormats = $this->getCustomNumberFormats();
|
|
$numberFormat = $customNumberFormats[$numFmtId];
|
|
}
|
|
|
|
return $numberFormat;
|
|
}
|
|
}
|