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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 DOMNode;
  11  
  12  /**
  13  * Convert simple expressions in curly brackets in text into xsl:value-of elements
  14  *
  15  * Will replace
  16  *     <span>{$FOO}{@bar}</span>
  17  * with
  18  *     <span><xsl:value-of value="$FOO"/><xsl:value-of value="@bar"/></span>
  19  */
  20  class ConvertCurlyExpressionsInText extends AbstractNormalization
  21  {
  22      /**
  23      * {@inheritdoc}
  24      */
  25      protected $queries = ['//*[namespace-uri() != $XSL]/text()[contains(., "{@") or contains(., "{$")]'];
  26  
  27      /**
  28      * Insert a text node before given node
  29      *
  30      * @param  string  $text
  31      * @param  DOMNode $node
  32      * @return void
  33      */
  34  	protected function insertTextBefore($text, $node)
  35      {
  36          if ($text > '')
  37          {
  38              $node->parentNode->insertBefore($this->createText($text), $node);
  39          }
  40      }
  41  
  42      /**
  43      * {@inheritdoc}
  44      */
  45  	protected function normalizeNode(DOMNode $node)
  46      {
  47          $parentNode = $node->parentNode;
  48  
  49          preg_match_all(
  50              '#\\{([$@][-\\w]+)\\}#',
  51              $node->textContent,
  52              $matches,
  53              PREG_SET_ORDER | PREG_OFFSET_CAPTURE
  54          );
  55  
  56          $lastPos = 0;
  57          foreach ($matches as $m)
  58          {
  59              $pos = $m[0][1];
  60  
  61              // Catch up to current position
  62              if ($pos > $lastPos)
  63              {
  64                  $text = substr($node->textContent, $lastPos, $pos - $lastPos);
  65                  $this->insertTextBefore($text, $node);
  66              }
  67              $lastPos = $pos + strlen($m[0][0]);
  68  
  69              // Add the xsl:value-of element
  70              $parentNode
  71                  ->insertBefore($this->createElement('xsl:value-of'), $node)
  72                  ->setAttribute('select', $m[1][0]);
  73          }
  74  
  75          // Append the rest of the text
  76          $text = substr($node->textContent, $lastPos);
  77          $this->insertTextBefore($text, $node);
  78  
  79          // Now remove the old text node
  80          $parentNode->removeChild($node);
  81      }
  82  }