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   1  <?php
   2  
   3  declare(strict_types=1);
   4  
   5  namespace OpenSpout\Writer\Common\Manager\Style;
   6  
   7  use OpenSpout\Common\Entity\Style\Style;
   8  
   9  /**
  10   * @internal
  11   */
  12  final class StyleMerger
  13  {
  14      /**
  15       * Merges the current style with the given style, using the given style as a base. This means that:
  16       *   - if current style and base style both have property A set, use current style property's value
  17       *   - if current style has property A set but base style does not, use current style property's value
  18       *   - if base style has property A set but current style does not, use base style property's value.
  19       *
  20       * @NOTE: This function returns a new style.
  21       *
  22       * @return Style New style corresponding to the merge of the 2 styles
  23       */
  24      public function merge(Style $style, Style $baseStyle): Style
  25      {
  26          $mergedStyle = clone $style;
  27  
  28          $this->mergeFontStyles($mergedStyle, $style, $baseStyle);
  29          $this->mergeOtherFontProperties($mergedStyle, $style, $baseStyle);
  30          $this->mergeCellProperties($mergedStyle, $style, $baseStyle);
  31  
  32          return $mergedStyle;
  33      }
  34  
  35      /**
  36       * @param Style $styleToUpdate (passed as reference)
  37       */
  38      private function mergeFontStyles(Style $styleToUpdate, Style $style, Style $baseStyle): void
  39      {
  40          if (!$style->hasSetFontBold() && $baseStyle->isFontBold()) {
  41              $styleToUpdate->setFontBold();
  42          }
  43          if (!$style->hasSetFontItalic() && $baseStyle->isFontItalic()) {
  44              $styleToUpdate->setFontItalic();
  45          }
  46          if (!$style->hasSetFontUnderline() && $baseStyle->isFontUnderline()) {
  47              $styleToUpdate->setFontUnderline();
  48          }
  49          if (!$style->hasSetFontStrikethrough() && $baseStyle->isFontStrikethrough()) {
  50              $styleToUpdate->setFontStrikethrough();
  51          }
  52      }
  53  
  54      /**
  55       * @param Style $styleToUpdate Style to update (passed as reference)
  56       */
  57      private function mergeOtherFontProperties(Style $styleToUpdate, Style $style, Style $baseStyle): void
  58      {
  59          if (!$style->hasSetFontSize() && Style::DEFAULT_FONT_SIZE !== $baseStyle->getFontSize()) {
  60              $styleToUpdate->setFontSize($baseStyle->getFontSize());
  61          }
  62          if (!$style->hasSetFontColor() && Style::DEFAULT_FONT_COLOR !== $baseStyle->getFontColor()) {
  63              $styleToUpdate->setFontColor($baseStyle->getFontColor());
  64          }
  65          if (!$style->hasSetFontName() && Style::DEFAULT_FONT_NAME !== $baseStyle->getFontName()) {
  66              $styleToUpdate->setFontName($baseStyle->getFontName());
  67          }
  68      }
  69  
  70      /**
  71       * @param Style $styleToUpdate Style to update (passed as reference)
  72       */
  73      private function mergeCellProperties(Style $styleToUpdate, Style $style, Style $baseStyle): void
  74      {
  75          if (!$style->hasSetWrapText() && $baseStyle->hasSetWrapText()) {
  76              $styleToUpdate->setShouldWrapText($baseStyle->shouldWrapText());
  77          }
  78          if (!$style->hasSetShrinkToFit() && $baseStyle->shouldShrinkToFit()) {
  79              $styleToUpdate->setShouldShrinkToFit();
  80          }
  81          if (!$style->hasSetCellAlignment() && $baseStyle->shouldApplyCellAlignment()) {
  82              $styleToUpdate->setCellAlignment($baseStyle->getCellAlignment());
  83          }
  84          if (!$style->hasSetCellVerticalAlignment() && $baseStyle->shouldApplyCellVerticalAlignment()) {
  85              $styleToUpdate->setCellVerticalAlignment($baseStyle->getCellVerticalAlignment());
  86          }
  87          if (null === $style->getBorder() && null !== ($border = $baseStyle->getBorder())) {
  88              $styleToUpdate->setBorder($border);
  89          }
  90          if (null === $style->getFormat() && null !== ($format = $baseStyle->getFormat())) {
  91              $styleToUpdate->setFormat($format);
  92          }
  93          if (null === $style->getBackgroundColor() && null !== ($bgColor = $baseStyle->getBackgroundColor())) {
  94              $styleToUpdate->setBackgroundColor($bgColor);
  95          }
  96      }
  97  }