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<?php |
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namespace Box\Spout\Writer\Common\Helper; |
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/** |
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* Class StyleHelperAbstract |
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* This class provides helper functions to manage styles |
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* |
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* @package Box\Spout\Writer\Common\Helper |
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*/ |
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abstract class StyleHelperAbstract implements StyleHelperInterface |
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{ |
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/** @var array [SERIALIZED_STYLE] => [STYLE_ID] mapping table, keeping track of the registered styles */ |
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protected $serializedStyleToStyleIdMappingTable = []; |
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/** @var array [STYLE_ID] => [STYLE] mapping table, keeping track of the registered styles */ |
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protected $styleIdToStyleMappingTable = []; |
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/** |
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* @param \Box\Spout\Writer\Style\Style $defaultStyle |
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*/ |
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public function __construct($defaultStyle) |
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{ |
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// This ensures that the default style is the first one to be registered |
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$this->registerStyle($defaultStyle); |
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} |
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/** |
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* Registers the given style as a used style. |
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* Duplicate styles won't be registered more than once. |
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* |
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* @param \Box\Spout\Writer\Style\Style $style The style to be registered |
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* @return \Box\Spout\Writer\Style\Style The registered style, updated with an internal ID. |
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*/ |
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public function registerStyle($style) |
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{ |
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$serializedStyle = $style->serialize(); |
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if (!$this->hasStyleAlreadyBeenRegistered($style)) { |
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$nextStyleId = count($this->serializedStyleToStyleIdMappingTable); |
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$style->setId($nextStyleId); |
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$this->serializedStyleToStyleIdMappingTable[$serializedStyle] = $nextStyleId; |
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$this->styleIdToStyleMappingTable[$nextStyleId] = $style; |
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} |
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return $this->getStyleFromSerializedStyle($serializedStyle); |
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} |
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/** |
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* Returns whether the given style has already been registered. |
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* |
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* @param \Box\Spout\Writer\Style\Style $style |
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* @return bool |
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*/ |
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protected function hasStyleAlreadyBeenRegistered($style) |
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{ |
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$serializedStyle = $style->serialize(); |
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// Using isset here because it is way faster than array_key_exists... |
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return isset($this->serializedStyleToStyleIdMappingTable[$serializedStyle]); |
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} |
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/** |
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* Returns the registered style associated to the given serialization. |
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* |
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* @param string $serializedStyle The serialized style from which the actual style should be fetched from |
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* @return \Box\Spout\Writer\Style\Style |
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*/ |
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protected function getStyleFromSerializedStyle($serializedStyle) |
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{ |
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$styleId = $this->serializedStyleToStyleIdMappingTable[$serializedStyle]; |
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return $this->styleIdToStyleMappingTable[$styleId]; |
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} |
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/** |
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* @return \Box\Spout\Writer\Style\Style[] List of registered styles |
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*/ |
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protected function getRegisteredStyles() |
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{ |
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return array_values($this->styleIdToStyleMappingTable); |
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} |
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/** |
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* Returns the default style |
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* |
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* @return \Box\Spout\Writer\Style\Style Default style |
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*/ |
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protected function getDefaultStyle() |
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{ |
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// By construction, the default style has ID 0 |
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return $this->styleIdToStyleMappingTable[0]; |
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} |
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/** |
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* Apply additional styles if the given row needs it. |
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* Typically, set "wrap text" if a cell contains a new line. |
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* |
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* @param \Box\Spout\Writer\Style\Style $style The original style |
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* @param array $dataRow The row the style will be applied to |
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* @return \Box\Spout\Writer\Style\Style The updated style |
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*/ |
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public function applyExtraStylesIfNeeded($style, $dataRow) |
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{ |
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$updatedStyle = $this->applyWrapTextIfCellContainsNewLine($style, $dataRow); |
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return $updatedStyle; |
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} |
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/** |
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* Set the "wrap text" option if a cell of the given row contains a new line. |
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* |
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* @NOTE: There is a bug on the Mac version of Excel (2011 and below) where new lines |
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* are ignored even when the "wrap text" option is set. This only occurs with |
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* inline strings (shared strings do work fine). |
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* A workaround would be to encode "\n" as "_x000D_" but it does not work |
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* on the Windows version of Excel... |
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* |
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* @param \Box\Spout\Writer\Style\Style $style The original style |
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* @param array $dataRow The row the style will be applied to |
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* @return \Box\Spout\Writer\Style\Style The eventually updated style |
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*/ |
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protected function applyWrapTextIfCellContainsNewLine($style, $dataRow) |
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{ |
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// if the "wrap text" option is already set, no-op |
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if ($style->hasSetWrapText()) { |
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return $style; |
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} |
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foreach ($dataRow as $cell) { |
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if (is_string($cell) && strpos($cell, "\n") !== false) { |
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$style->setShouldWrapText(); |
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break; |
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} |
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} |
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return $style; |
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} |
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} |
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box /
spout
