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Differences Between: [Versions 310 and 401] [Versions 39 and 401]

   1  <?php
   2  
   3  namespace Box\Spout\Writer\Common\Manager\Style;
   4  
   5  use Box\Spout\Common\Entity\Style\Style;
   6  
   7  /**
   8   * Class StyleRegistry
   9   * Registry for all used styles
  10   */
  11  class StyleRegistry
  12  {
  13      /** @var array [SERIALIZED_STYLE] => [STYLE_ID] mapping table, keeping track of the registered styles */
  14      protected $serializedStyleToStyleIdMappingTable = [];
  15  
  16      /** @var array [STYLE_ID] => [STYLE] mapping table, keeping track of the registered styles */
  17      protected $styleIdToStyleMappingTable = [];
  18  
  19      /**
  20       * @param Style $defaultStyle
  21       */
  22      public function __construct(Style $defaultStyle)
  23      {
  24          // This ensures that the default style is the first one to be registered
  25          $this->registerStyle($defaultStyle);
  26      }
  27  
  28      /**
  29       * Registers the given style as a used style.
  30       * Duplicate styles won't be registered more than once.
  31       *
  32       * @param Style $style The style to be registered
  33       * @return Style The registered style, updated with an internal ID.
  34       */
  35      public function registerStyle(Style $style)
  36      {
  37          $serializedStyle = $this->serialize($style);
  38  
  39          if (!$this->hasSerializedStyleAlreadyBeenRegistered($serializedStyle)) {
  40              $nextStyleId = \count($this->serializedStyleToStyleIdMappingTable);
  41              $style->markAsRegistered($nextStyleId);
  42  
  43              $this->serializedStyleToStyleIdMappingTable[$serializedStyle] = $nextStyleId;
  44              $this->styleIdToStyleMappingTable[$nextStyleId] = $style;
  45          }
  46  
  47          return $this->getStyleFromSerializedStyle($serializedStyle);
  48      }
  49  
  50      /**
  51       * Returns whether the serialized style has already been registered.
  52       *
  53       * @param string $serializedStyle The serialized style
  54       * @return bool
  55       */
  56      protected function hasSerializedStyleAlreadyBeenRegistered(string $serializedStyle)
  57      {
  58          // Using isset here because it is way faster than array_key_exists...
  59          return isset($this->serializedStyleToStyleIdMappingTable[$serializedStyle]);
  60      }
  61  
  62      /**
  63       * Returns the registered style associated to the given serialization.
  64       *
  65       * @param string $serializedStyle The serialized style from which the actual style should be fetched from
  66       * @return Style
  67       */
  68      protected function getStyleFromSerializedStyle($serializedStyle)
  69      {
  70          $styleId = $this->serializedStyleToStyleIdMappingTable[$serializedStyle];
  71  
  72          return $this->styleIdToStyleMappingTable[$styleId];
  73      }
  74  
  75      /**
  76       * @return Style[] List of registered styles
  77       */
  78      public function getRegisteredStyles()
  79      {
  80          return \array_values($this->styleIdToStyleMappingTable);
  81      }
  82  
  83      /**
  84       * @param int $styleId
  85       * @return Style
  86       */
  87      public function getStyleFromStyleId($styleId)
  88      {
  89          return $this->styleIdToStyleMappingTable[$styleId];
  90      }
  91  
  92      /**
  93       * Serializes the style for future comparison with other styles.
  94       * The ID is excluded from the comparison, as we only care about
  95       * actual style properties.
  96       *
  97       * @param Style $style
  98       * @return string The serialized style
  99       */
 100      public function serialize(Style $style)
 101      {
 102          // In order to be able to properly compare style, set static ID value and reset registration
 103          $currentId = $style->getId();
 104          $style->unmarkAsRegistered();
 105  
 106          $serializedStyle = \serialize($style);
 107  
 108          $style->markAsRegistered($currentId);
 109  
 110          return $serializedStyle;
 111      }
 112  }