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<?php |
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namespace Box\Spout\Writer\Common\Manager\Style; |
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use Box\Spout\Writer\Common\Entity\Style\Style; |
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/** |
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* Class StyleRegistry |
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* Registry for all used styles |
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* |
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* @package Box\Spout\Writer\Common\Manager\Style |
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*/ |
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class StyleRegistry |
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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 Style $defaultStyle |
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*/ |
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public function __construct(Style $defaultStyle) |
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{ |
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// This ensures that the default style is the first one to be registered |
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$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 Style $style The style to be registered |
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* @return Style The registered style, updated with an internal ID. |
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*/ |
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public function registerStyle(Style $style) |
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{ |
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$serializedStyle = $this->serialize($style); |
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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 Style $style |
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* @return bool |
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*/ |
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protected function hasStyleAlreadyBeenRegistered(Style $style) |
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{ |
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$serializedStyle = $this->serialize($style); |
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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 $serializedStyle The serialized style from which the actual style should be fetched from |
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* @return Style |
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*/ |
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protected function getStyleFromSerializedStyle($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 Style[] List of registered styles |
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*/ |
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public 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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* @param int $styleId |
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* @return Style |
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*/ |
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public function getStyleFromStyleId($styleId) |
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{ |
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return $this->styleIdToStyleMappingTable[$styleId]; |
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} |
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/** |
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* Serializes the style for future comparison with other styles. |
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* The ID is excluded from the comparison, as we only care about |
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* actual style properties. |
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* |
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* @param Style $style |
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* @return string The serialized style |
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*/ |
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public function serialize(Style $style) |
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{ |
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// In order to be able to properly compare style, set static ID value |
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$currentId = $style->getId(); |
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$style->setId(0); |
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$serializedStyle = serialize($style); |
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$style->setId($currentId); |
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return $serializedStyle; |
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} |
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} |
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box /
spout
