132 lines
4.4 KiB
PHP
132 lines
4.4 KiB
PHP
<?php
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <fabien@symfony.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Symfony\Component\CssSelector\Node;
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use Symfony\Component\CssSelector\XPathExpr;
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use Symfony\Component\CssSelector\Exception\ParseException;
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/**
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* AttribNode represents a "selector[namespace|attrib operator value]" node.
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*
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* This component is a port of the Python lxml library,
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* which is copyright Infrae and distributed under the BSD license.
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*
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* @author Fabien Potencier <fabien@symfony.com>
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*/
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class AttribNode implements NodeInterface
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{
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protected $selector;
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protected $namespace;
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protected $attrib;
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protected $operator;
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protected $value;
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/**
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* Constructor.
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*
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* @param NodeInterface $selector The XPath selector
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* @param string $namespace The namespace
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* @param string $attrib The attribute
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* @param string $operator The operator
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* @param string $value The value
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*/
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public function __construct($selector, $namespace, $attrib, $operator, $value)
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{
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$this->selector = $selector;
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$this->namespace = $namespace;
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$this->attrib = $attrib;
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$this->operator = $operator;
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$this->value = $value;
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}
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/**
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* {@inheritDoc}
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*/
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public function __toString()
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{
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if ($this->operator == 'exists') {
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return sprintf('%s[%s[%s]]', __CLASS__, $this->selector, $this->formatAttrib());
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}
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return sprintf('%s[%s[%s %s %s]]', __CLASS__, $this->selector, $this->formatAttrib(), $this->operator, $this->value);
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}
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/**
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* {@inheritDoc}
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*/
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public function toXpath()
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{
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$path = $this->selector->toXpath();
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$attrib = $this->xpathAttrib();
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$value = $this->value;
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if ($this->operator == 'exists') {
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$path->addCondition($attrib);
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} elseif ($this->operator == '=') {
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$path->addCondition(sprintf('%s = %s', $attrib, XPathExpr::xpathLiteral($value)));
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} elseif ($this->operator == '!=') {
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// FIXME: this seems like a weird hack...
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if ($value) {
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$path->addCondition(sprintf('not(%s) or %s != %s', $attrib, $attrib, XPathExpr::xpathLiteral($value)));
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} else {
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$path->addCondition(sprintf('%s != %s', $attrib, XPathExpr::xpathLiteral($value)));
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}
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// path.addCondition('%s != %s' % (attrib, xpathLiteral(value)))
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} elseif ($this->operator == '~=') {
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$path->addCondition(sprintf("contains(concat(' ', normalize-space(%s), ' '), %s)", $attrib, XPathExpr::xpathLiteral(' '.$value.' ')));
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} elseif ($this->operator == '|=') {
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// Weird, but true...
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$path->addCondition(sprintf('%s = %s or starts-with(%s, %s)', $attrib, XPathExpr::xpathLiteral($value), $attrib, XPathExpr::xpathLiteral($value.'-')));
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} elseif ($this->operator == '^=') {
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$path->addCondition(sprintf('starts-with(%s, %s)', $attrib, XPathExpr::xpathLiteral($value)));
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} elseif ($this->operator == '$=') {
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// Oddly there is a starts-with in XPath 1.0, but not ends-with
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$path->addCondition(sprintf('substring(%s, string-length(%s)-%s) = %s', $attrib, $attrib, strlen($value) - 1, XPathExpr::xpathLiteral($value)));
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} elseif ($this->operator == '*=') {
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// FIXME: case sensitive?
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$path->addCondition(sprintf('contains(%s, %s)', $attrib, XPathExpr::xpathLiteral($value)));
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} else {
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throw new ParseException(sprintf('Unknown operator: %s', $this->operator));
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}
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return $path;
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}
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/**
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* Returns the XPath Attribute
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*
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* @return string The XPath attribute
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*/
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protected function xpathAttrib()
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{
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// FIXME: if attrib is *?
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if ($this->namespace == '*') {
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return '@'.$this->attrib;
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}
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return sprintf('@%s:%s', $this->namespace, $this->attrib);
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}
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/**
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* Returns a formatted attribute
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*
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* @return string The formatted attribute
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*/
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protected function formatAttrib()
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{
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if ($this->namespace == '*') {
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return $this->attrib;
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}
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return sprintf('%s|%s', $this->namespace, $this->attrib);
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}
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}
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