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<?php
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declare(strict_types=1);
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namespace OpenSpout\Writer\Common\Manager\Style;
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use OpenSpout\Common\Entity\Style\Style;
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/**
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* @internal
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*/
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final class StyleMerger
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{
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/**
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* Merges the current style with the given style, using the given style as a base. This means that:
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* - if current style and base style both have property A set, use current style property's value
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* - if current style has property A set but base style does not, use current style property's value
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* - if base style has property A set but current style does not, use base style property's value.
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*
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* @NOTE: This function returns a new style.
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*
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* @return Style New style corresponding to the merge of the 2 styles
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*/
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public function merge(Style $style, Style $baseStyle): Style
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{
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$mergedStyle = clone $style;
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$this->mergeFontStyles($mergedStyle, $style, $baseStyle);
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$this->mergeOtherFontProperties($mergedStyle, $style, $baseStyle);
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$this->mergeCellProperties($mergedStyle, $style, $baseStyle);
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return $mergedStyle;
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}
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/**
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* @param Style $styleToUpdate (passed as reference)
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*/
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private function mergeFontStyles(Style $styleToUpdate, Style $style, Style $baseStyle): void
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{
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if (!$style->hasSetFontBold() && $baseStyle->isFontBold()) {
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$styleToUpdate->setFontBold();
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}
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if (!$style->hasSetFontItalic() && $baseStyle->isFontItalic()) {
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$styleToUpdate->setFontItalic();
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}
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if (!$style->hasSetFontUnderline() && $baseStyle->isFontUnderline()) {
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$styleToUpdate->setFontUnderline();
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}
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if (!$style->hasSetFontStrikethrough() && $baseStyle->isFontStrikethrough()) {
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$styleToUpdate->setFontStrikethrough();
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}
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}
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/**
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* @param Style $styleToUpdate Style to update (passed as reference)
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*/
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private function mergeOtherFontProperties(Style $styleToUpdate, Style $style, Style $baseStyle): void
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{
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if (!$style->hasSetFontSize() && Style::DEFAULT_FONT_SIZE !== $baseStyle->getFontSize()) {
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$styleToUpdate->setFontSize($baseStyle->getFontSize());
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}
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if (!$style->hasSetFontColor() && Style::DEFAULT_FONT_COLOR !== $baseStyle->getFontColor()) {
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$styleToUpdate->setFontColor($baseStyle->getFontColor());
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}
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if (!$style->hasSetFontName() && Style::DEFAULT_FONT_NAME !== $baseStyle->getFontName()) {
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$styleToUpdate->setFontName($baseStyle->getFontName());
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}
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}
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/**
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* @param Style $styleToUpdate Style to update (passed as reference)
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*/
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private function mergeCellProperties(Style $styleToUpdate, Style $style, Style $baseStyle): void
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{
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if (!$style->hasSetWrapText() && $baseStyle->hasSetWrapText()) {
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$styleToUpdate->setShouldWrapText($baseStyle->shouldWrapText());
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}
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if (!$style->hasSetShrinkToFit() && $baseStyle->shouldShrinkToFit()) {
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$styleToUpdate->setShouldShrinkToFit();
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}
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if (!$style->hasSetCellAlignment() && $baseStyle->shouldApplyCellAlignment()) {
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$styleToUpdate->setCellAlignment($baseStyle->getCellAlignment());
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}
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if (!$style->hasSetCellVerticalAlignment() && $baseStyle->shouldApplyCellVerticalAlignment()) {
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$styleToUpdate->setCellVerticalAlignment($baseStyle->getCellVerticalAlignment());
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}
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if (null === $style->getBorder() && null !== ($border = $baseStyle->getBorder())) {
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$styleToUpdate->setBorder($border);
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}
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if (null === $style->getFormat() && null !== ($format = $baseStyle->getFormat())) {
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$styleToUpdate->setFormat($format);
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}
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if (null === $style->getBackgroundColor() && null !== ($bgColor = $baseStyle->getBackgroundColor())) {
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$styleToUpdate->setBackgroundColor($bgColor);
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}
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}
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}
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