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   1  <?php
   2  
   3  /**
   4  * @package   s9e\TextFormatter
   5  * @copyright Copyright (c) 2010-2022 The s9e authors
   6  * @license   http://www.opensource.org/licenses/mit-license.php The MIT License
   7  */
   8  namespace s9e\TextFormatter\Configurator\TemplateNormalizations;
   9  
  10  use DOMElement;
  11  
  12  /**
  13  * Optimize conditional attributes
  14  *
  15  * Will replace conditional attributes with a <xsl:copy-of/>, e.g.
  16  *    <xsl:if test="@foo">
  17  *        <xsl:attribute name="foo">
  18  *            <xsl:value-of select="@foo" />
  19  *        </xsl:attribute>
  20  *    </xsl:if>
  21  * into
  22  *    <xsl:copy-of select="@foo"/>
  23  */
  24  class OptimizeConditionalAttributes extends AbstractNormalization
  25  {
  26      /**
  27      * {@inheritdoc}
  28      */
  29      protected $queries = ['//xsl:if[starts-with(@test, "@")][count(descendant::node()) = 2][xsl:attribute[@name = substring(../@test, 2)][xsl:value-of[@select = ../../@test]]]'];
  30  
  31      /**
  32      * {@inheritdoc}
  33      */
  34  	protected function normalizeElement(DOMElement $element)
  35      {
  36          $copyOf = $this->createElement('xsl:copy-of');
  37          $copyOf->setAttribute('select', $element->getAttribute('test'));
  38  
  39          $element->parentNode->replaceChild($copyOf, $element);
  40      }
  41  }