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())));
}