+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\CssSelector\XPath\Extension;
+
+use Symfony\Component\CssSelector\XPath\Translator;
+use Symfony\Component\CssSelector\XPath\XPathExpr;
+
+/**
+ * XPath expression translator attribute extension.
+ *
+ * This component is a port of the Python cssselect library,
+ * which is copyright Ian Bicking, @see https://github.com/SimonSapin/cssselect.
+ *
+ * @author Jean-François Simon <jeanfrancois.simon@sensiolabs.com>
+ *
+ * @internal
+ */
+class AttributeMatchingExtension extends AbstractExtension
+{
+ /**
+ * {@inheritdoc}
+ */
+ public function getAttributeMatchingTranslators()
+ {
+ return array(
+ 'exists' => array($this, 'translateExists'),
+ '=' => array($this, 'translateEquals'),
+ '~=' => array($this, 'translateIncludes'),
+ '|=' => array($this, 'translateDashMatch'),
+ '^=' => array($this, 'translatePrefixMatch'),
+ '$=' => array($this, 'translateSuffixMatch'),
+ '*=' => array($this, 'translateSubstringMatch'),
+ '!=' => array($this, 'translateDifferent'),
+ );
+ }
+
+ /**
+ * @param XPathExpr $xpath
+ * @param string $attribute
+ * @param string $value
+ *
+ * @return XPathExpr
+ */
+ public function translateExists(XPathExpr $xpath, $attribute, $value)
+ {
+ return $xpath->addCondition($attribute);
+ }
+
+ /**
+ * @param XPathExpr $xpath
+ * @param string $attribute
+ * @param string $value
+ *
+ * @return XPathExpr
+ */
+ public function translateEquals(XPathExpr $xpath, $attribute, $value)
+ {
+ return $xpath->addCondition(sprintf('%s = %s', $attribute, Translator::getXpathLiteral($value)));
+ }
+
+ /**
+ * @param XPathExpr $xpath
+ * @param string $attribute
+ * @param string $value
+ *
+ * @return XPathExpr
+ */
+ public function translateIncludes(XPathExpr $xpath, $attribute, $value)
+ {
+ return $xpath->addCondition($value ? sprintf(
+ '%1$s and contains(concat(\' \', normalize-space(%1$s), \' \'), %2$s)',
+ $attribute,
+ Translator::getXpathLiteral(' '.$value.' ')
+ ) : '0');
+ }
+
+ /**
+ * @param XPathExpr $xpath
+ * @param string $attribute
+ * @param string $value
+ *
+ * @return XPathExpr
+ */
+ public function translateDashMatch(XPathExpr $xpath, $attribute, $value)
+ {
+ return $xpath->addCondition(sprintf(
+ '%1$s and (%1$s = %2$s or starts-with(%1$s, %3$s))',
+ $attribute,
+ Translator::getXpathLiteral($value),
+ Translator::getXpathLiteral($value.'-')
+ ));
+ }
+
+ /**
+ * @param XPathExpr $xpath
+ * @param string $attribute
+ * @param string $value
+ *
+ * @return XPathExpr
+ */
+ public function translatePrefixMatch(XPathExpr $xpath, $attribute, $value)
+ {
+ return $xpath->addCondition($value ? sprintf(
+ '%1$s and starts-with(%1$s, %2$s)',
+ $attribute,
+ Translator::getXpathLiteral($value)
+ ) : '0');
+ }
+
+ /**
+ * @param XPathExpr $xpath
+ * @param string $attribute
+ * @param string $value
+ *
+ * @return XPathExpr
+ */
+ public function translateSuffixMatch(XPathExpr $xpath, $attribute, $value)
+ {
+ return $xpath->addCondition($value ? sprintf(
+ '%1$s and substring(%1$s, string-length(%1$s)-%2$s) = %3$s',
+ $attribute,
+ strlen($value) - 1,
+ Translator::getXpathLiteral($value)
+ ) : '0');
+ }
+
+ /**
+ * @param XPathExpr $xpath
+ * @param string $attribute
+ * @param string $value
+ *
+ * @return XPathExpr
+ */
+ public function translateSubstringMatch(XPathExpr $xpath, $attribute, $value)
+ {
+ return $xpath->addCondition($value ? sprintf(
+ '%1$s and contains(%1$s, %2$s)',
+ $attribute,
+ Translator::getXpathLiteral($value)
+ ) : '0');
+ }
+
+ /**
+ * @param XPathExpr $xpath
+ * @param string $attribute
+ * @param string $value
+ *
+ * @return XPathExpr
+ */
+ public function translateDifferent(XPathExpr $xpath, $attribute, $value)
+ {
+ return $xpath->addCondition(sprintf(
+ $value ? 'not(%1$s) or %1$s != %2$s' : '%s != %s',
+ $attribute,
+ Translator::getXpathLiteral($value)
+ ));
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function getName()
+ {
+ return 'attribute-matching';
+ }
+}