This component is a port of the Python lxml library,
which is copyright Infrae and distributed under the BSD license.
public function testToXpath() { $element = new ElementNode('*', 'h1'); // h1:contains("foo") $function = new FunctionNode($element, ':', 'contains', 'foo'); $this->assertEquals("h1[contains(string(.), 'foo')]", (string) $function->toXpath(), '->toXpath() returns the xpath representation of the node'); // h1:nth-child(1) $function = new FunctionNode($element, ':', 'nth-child', 1); $this->assertEquals("*/*[name() = 'h1' and (position() = 1)]", (string) $function->toXpath(), '->toXpath() returns the xpath representation of the node'); // h1:nth-child() $function = new FunctionNode($element, ':', 'nth-child', ''); $this->assertEquals("h1[false() and position() = 0]", (string) $function->toXpath(), '->toXpath() returns the xpath representation of the node'); // h1:nth-child(odd) $element2 = new ElementNode('*', new Token('Symbol', 'odd', -1)); $function = new FunctionNode($element, ':', 'nth-child', $element2); $this->assertEquals("*/*[name() = 'h1' and ((position() -1) mod 2 = 0 and position() >= 1)]", (string) $function->toXpath(), '->toXpath() returns the xpath representation of the node'); // h1:nth-child(even) $element2 = new ElementNode('*', new Token('Symbol', 'even', -1)); $function = new FunctionNode($element, ':', 'nth-child', $element2); $this->assertEquals("*/*[name() = 'h1' and ((position() +0) mod 2 = 0 and position() >= 0)]", (string) $function->toXpath(), '->toXpath() returns the xpath representation of the node'); // h1:nth-child(n) $element2 = new ElementNode('*', new Token('Symbol', 'n', -1)); $function = new FunctionNode($element, ':', 'nth-child', $element2); $this->assertEquals("*/*[name() = 'h1' and (position() >= 0)]", (string) $function->toXpath(), '->toXpath() returns the xpath representation of the node'); // h1:nth-child(3n+1) $element2 = new ElementNode('*', new Token('Symbol', '3n+1', -1)); $function = new FunctionNode($element, ':', 'nth-child', $element2); $this->assertEquals("*/*[name() = 'h1' and ((position() -1) mod 3 = 0 and position() >= 1)]", (string) $function->toXpath(), '->toXpath() returns the xpath representation of the node'); // h1:nth-child(n+1) $element2 = new ElementNode('*', new Token('Symbol', 'n+1', -1)); $function = new FunctionNode($element, ':', 'nth-child', $element2); $this->assertEquals("*/*[name() = 'h1' and (position() >= 1)]", (string) $function->toXpath(), '->toXpath() returns the xpath representation of the node'); // h1:nth-child(2n) $element2 = new ElementNode('*', new Token('Symbol', '2n', -1)); $function = new FunctionNode($element, ':', 'nth-child', $element2); $this->assertEquals("*/*[name() = 'h1' and ((position() +0) mod 2 = 0 and position() >= 0)]", (string) $function->toXpath(), '->toXpath() returns the xpath representation of the node'); // h1:nth-child(-n) $element2 = new ElementNode('*', new Token('Symbol', '-n', -1)); $function = new FunctionNode($element, ':', 'nth-child', $element2); $this->assertEquals("*/*[name() = 'h1' and ((position() +0) mod -1 = 0 and position() >= 0)]", (string) $function->toXpath(), '->toXpath() returns the xpath representation of the node'); // h1:nth-last-child(2) $function = new FunctionNode($element, ':', 'nth-last-child', 2); $this->assertEquals("*/*[name() = 'h1' and (position() = last() - 2)]", (string) $function->toXpath(), '->toXpath() returns the xpath representation of the node'); // h1:nth-of-type(2) $function = new FunctionNode($element, ':', 'nth-of-type', 2); $this->assertEquals("*/h1[position() = 2]", (string) $function->toXpath(), '->toXpath() returns the xpath representation of the node'); // h1:nth-last-of-type(2) $function = new FunctionNode($element, ':', 'nth-last-of-type', 2); $this->assertEquals("*/h1[position() = last() - 2]", (string) $function->toXpath(), '->toXpath() returns the xpath representation of the node'); /* // h1:not(p) $element2 = new ElementNode('*', 'p'); $function = new FunctionNode($element, ':', 'not', $element2); $this->assertEquals("h1[not()]", (string) $function->toXpath(), '->toXpath() returns the xpath representation of the node'); */ }
/** * @param XPathExpr $xpath * @param FunctionNode $function * * @return XPathExpr * * @throws ExpressionErrorException */ public function translateLang(XPathExpr $xpath, FunctionNode $function) { $arguments = $function->getArguments(); foreach ($arguments as $token) { if (!($token->isString() || $token->isIdentifier())) { throw new ExpressionErrorException('Expected a single string or identifier for :lang(), got ' . implode(', ', $arguments)); } } return $xpath->addCondition(sprintf('ancestor-or-self::*[@lang][1][starts-with(concat(' . "translate(@%s, 'ABCDEFGHIJKLMNOPQRSTUVWXYZ', 'abcdefghijklmnopqrstuvwxyz'), '-')" . ', %s)]', 'lang', Translator::getXpathLiteral(strtolower($arguments[0]->getValue()) . '-'))); }
/** * @param XPathExpr $xpath * @param FunctionNode $function * * @return XPathExpr * * @throws ExpressionErrorException */ public function addFunction(XPathExpr $xpath, FunctionNode $function) { if (!isset($this->functionTranslators[$function->getName()])) { throw new ExpressionErrorException(sprintf('Function "%s" not supported.', $function->getName())); } return call_user_func($this->functionTranslators[$function->getName()], $xpath, $function); }
/** * @param Node\FunctionNode $node * * @return XPathExpr */ public function translateFunction(Node\FunctionNode $node) { $xpath = $this->translator->nodeToXPath($node->getSelector()); return $this->translator->addFunction($xpath, $node); }
/** * @param XPathExpr $xpath * @param FunctionNode $function * * @return XPathExpr * * @throws ExpressionErrorException */ public function translateLang(XPathExpr $xpath, FunctionNode $function) { $arguments = $function->getArguments(); foreach ($arguments as $token) { if (!($token->isString() || $token->isIdentifier())) { throw new ExpressionErrorException('Expected a single string or identifier for :lang(), got ' . implode(', ', $arguments)); } } return $xpath->addCondition(sprintf('lang(%s)', Translator::getXpathLiteral($arguments[0]->getValue()))); }