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<?php |
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/** |
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* @package s9e\TextFormatter |
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* @copyright Copyright (c) 2010-2017 The s9e Authors |
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* @license http://www.opensource.org/licenses/mit-license.php The MIT License |
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*/ |
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namespace s9e\TextFormatter\Configurator\TemplateNormalizations; |
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use DOMAttr; |
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use DOMElement; |
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use DOMNode; |
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use s9e\TextFormatter\Configurator\Helpers\AVTHelper; |
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use s9e\TextFormatter\Configurator\Helpers\TemplateParser; |
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class InlineInferredValues extends AbstractNormalization |
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{ |
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/** |
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* {@inheritdoc} |
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*/ |
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protected $queries = ['//xsl:if', '//xsl:when']; |
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/** |
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* Inline the text content of a node or the value of an attribute where it's known |
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* |
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* Will replace |
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* <xsl:if test="@foo='Foo'"><xsl:value-of select="@foo"/></xsl:if> |
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* with |
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* <xsl:if test="@foo='Foo'">Foo</xsl:if> |
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* |
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* @param DOMElement $element |
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* @return void |
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*/ |
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protected function normalizeElement(DOMElement $element) |
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{ |
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// Test whether the map has exactly one key and one value |
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$map = TemplateParser::parseEqualityExpr($element->getAttribute('test')); |
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if ($map === false || count($map) !== 1 || count($map[key($map)]) !== 1) |
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{ |
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return; |
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} |
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$expr = key($map); |
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$value = end($map[$expr]); |
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$this->inlineInferredValue($element, $expr, $value); |
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} |
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/** |
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* Replace the inferred value in given node and its descendants |
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* |
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* @param DOMNode $node Context node |
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* @param string $expr XPath expression |
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* @param string $value Inferred value |
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* @return void |
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*/ |
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protected function inlineInferredValue(DOMNode $node, $expr, $value) |
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{ |
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// Get xsl:value-of descendants that match the condition |
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$query = './/xsl:value-of[@select="' . $expr . '"]'; |
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foreach ($this->xpath($query, $node) as $valueOf) |
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{ |
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$this->replaceValueOf($valueOf, $value); |
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} |
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// Get all attributes from non-XSL elements that *could* match the condition |
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$query = './/*[namespace-uri() != $XSL]/@*[contains(., "{' . $expr . '}")]'; |
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foreach ($this->xpath($query, $node) as $attribute) |
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{ |
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$this->replaceAttribute($attribute, $expr, $value); |
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} |
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} |
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/** |
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* Replace an expression with a literal value in given attribute |
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* |
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* @param DOMAttr $attribute |
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* @param string $expr |
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* @param string $value |
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* @return void |
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*/ |
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protected function replaceAttribute(DOMAttr $attribute, $expr, $value) |
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{ |
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AVTHelper::replace( |
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$attribute, |
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function ($token) use ($expr, $value) |
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{ |
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// Test whether this expression is the one we're looking for |
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if ($token[0] === 'expression' && $token[1] === $expr) |
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{ |
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// Replace the expression with the value (as a literal) |
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$token = ['literal', $value]; |
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} |
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return $token; |
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} |
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); |
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} |
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/** |
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* Replace an xsl:value-of element with a literal value |
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* |
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* @param DOMElement $valueOf |
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* @param string $value |
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* @return void |
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*/ |
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protected function replaceValueOf(DOMElement $valueOf, $value) |
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{ |
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$valueOf->parentNode->replaceChild( |
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$valueOf->ownerDocument->createTextNode($value), |
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$valueOf |
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); |
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} |
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} |
s9e /
TextFormatter
