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<?php
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/**
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* This file is part of the O2System Framework package.
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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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* @author Steeve Andrian Salim
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* @copyright Copyright (c) Steeve Andrian Salim
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*/
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// ------------------------------------------------------------------------
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namespace O2System\Html\Dom;
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// ------------------------------------------------------------------------
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use InvalidArgumentException;
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use O2System\Html\Dom\Lists\Nodes;
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use RuntimeException;
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/**
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* Class XPath
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*
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* @package O2System\HTML\DOM
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*/
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class XPath extends \DOMXPath
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{
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/**
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* XPath Compiled Expressions
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*
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* @var array
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*/
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private $compiledExpressions = [];
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// ------------------------------------------------------------------------
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/**
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* XPath::query
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*
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* Evaluates the given XPath expression.
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*
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* @see http://php.net/manual/en/domxpath.query.php
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*
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* @param string $expression <p>
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* The XPath expression to execute.
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* </p>
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* @param \DOMNode $context [optional] <p>
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* The optional node context can be specified for
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* doing relative XPath queries. By default, the queries are relative to
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* the root element.
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* </p>
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*
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* @return Nodes a DOMNodeList containing all nodes matching
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* the given XPath expression. Any expression which do
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* not return nodes will return an empty DOMNodeList.
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* @since 5.0
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*/
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public function query($expression, \DOMNode $context = null, $registerNodeNS = null)
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{
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if (strpos($expression, '/') === false) {
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$expression = $this->fetchExpression($expression);
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}
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return new Lists\Nodes(parent::query($expression, $context));
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}
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// ------------------------------------------------------------------------
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/**
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* XPath::fetchExpression
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*
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* @param string $expression
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*
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* @return string
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*/
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private function fetchExpression($expression)
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{
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$selectors = explode(',', $expression);
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$paths = [];
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foreach ($selectors as $selector) {
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$selector = trim($selector);
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if (array_key_exists($selector, $this->compiledExpressions)) {
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$paths[] = $this->compiledExpressions[ $selector ];
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continue;
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}
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$this->compiledExpressions[ $selector ] = $this->fetchCssExpression($selector);
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$paths[] = $this->compiledExpressions[ $selector ];
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}
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return implode('|', $paths);
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}
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// ------------------------------------------------------------------------
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/**
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* XPath::fetchCssExpression
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*
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* Converts a CSS selector into an XPath expression.
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*
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* @param string $selector A CSS selector
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* @param string $prefix Specifies the nesting of nodes
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*
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* @return string XPath expression
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*/
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private function fetchCssExpression($selector, $prefix = '//')
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{
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$pos = strrpos($selector, '::');
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if ($pos !== false) {
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$property = substr($selector, $pos + 2);
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$property = $this->fetchCssProperty($property);
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$property = $this->parseCssProperty($property[ 'name' ], $property[ 'args' ]);
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$selector = substr($selector, 0, $pos);
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}
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if (substr($selector, 0, 1) === '>') {
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$prefix = '/';
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$selector = ltrim($selector, '> ');
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}
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$segments = $this->getSelectorSegments($selector);
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$expression = '';
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while (count($segments) > 0) {
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$expression .= $this->generateExpression($segments, $prefix);
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$selector = trim(substr($selector, strlen($segments[ 'selector' ])));
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$prefix = isset($segments[ 'rel' ]) ? '/' : '//';
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if ($selector === '') {
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break;
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}
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$segments = $this->getSelectorSegments($selector);
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}
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if (isset($property)) {
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$expression = $expression . '/' . $property;
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}
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return $expression;
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}
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// ------------------------------------------------------------------------
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/**
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* XPath::fetchCssProperty
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*
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* @param $property
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*
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* @return array
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*/
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protected function fetchCssProperty($property)
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{
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$name = '(?P<name>[\w\-]*)';
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$args = '(?:\((?P<args>[^\)]+)\))';
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$regexp = '/(?:' . $name . $args . '?)?/is';
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if (preg_match($regexp, $property, $segments)) {
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$result = [];
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$result[ 'name' ] = $segments[ 'name' ];
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$result[ 'args' ] = isset($segments[ 'args' ]) ? explode('|', $segments[ 'args' ]) : [];
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return $result;
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}
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throw new RuntimeException('Invalid selector');
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}
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// ------------------------------------------------------------------------
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/**
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* XPath::parseCssProperty
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*
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* @param string $name
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* @param array $args
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*
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* @return string
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*/
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protected function parseCssProperty($name, $args = [])
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{
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if ($name === 'text') {
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return 'text()';
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}
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if ($name === 'attr') {
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$attributes = [];
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foreach ($args as $attribute) {
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$attributes[] = sprintf('name() = "%s"', $attribute);
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}
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return sprintf('@*[%s]', implode(' or ', $attributes));
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}
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throw new RuntimeException('HTML_E_INVALID_CSS_PROPERTY');
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}
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// ------------------------------------------------------------------------
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/**
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* XPath::getSelectorSegments
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*
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* Splits the CSS selector into parts (tag name, ID, classes, attributes, pseudo-class).
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*
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* @param string $selector CSS selector
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*
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* @return array
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*
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* @throws \InvalidArgumentException if an empty string is passed
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* @throws \RuntimeException if the selector is not valid
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*/
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public function getSelectorSegments($selector)
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{
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$selector = trim($selector);
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if ($selector === '') {
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throw new InvalidArgumentException('HTML_E_INVALID_SELECTOR');
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}
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$tag = '(?P<tag>[\*|\w|\-]+)?';
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$id = '(?:#(?P<id>[\w|\-]+))?';
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$classes = '(?P<classes>\.[\w|\-|\.]+)*';
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$attrs = '(?P<attrs>\[.+\])*';
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$name = '(?P<pseudo>[\w\-]*)';
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$expr = '(?:\((?P<expr>[^\)]+)\))';
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$pseudo = '(?::' . $name . $expr . '?)?';
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$rel = '\s*(?P<rel>>)?';
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$regexp = '/' . $tag . $id . $classes . $attrs . $pseudo . $rel . '/is';
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if (preg_match($regexp, $selector, $segments)) {
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if ($segments[ 0 ] === '') {
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throw new RuntimeException('HTML_E_INVALID_SELECTOR');
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}
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$result[ 'selector' ] = $segments[ 0 ];
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$result[ 'tag' ] = (isset($segments[ 'tag' ]) and $segments[ 'tag' ] !== '') ? $segments[ 'tag' ] : '*';
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// if the id attribute specified
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if (isset($segments[ 'id' ]) and $segments[ 'id' ] !== '') {
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$result[ 'id' ] = $segments[ 'id' ];
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}
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// if the attributes specified
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if (isset($segments[ 'attrs' ])) {
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$attributes = trim($segments[ 'attrs' ], '[]');
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$attributes = explode('][', $attributes);
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foreach ($attributes as $attribute) {
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if ($attribute !== '') {
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list($name, $value) = array_pad(explode('=', $attribute, 2), 2, null);
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// equal null if specified only the attribute name
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$result[ 'attributes' ][ $name ] = is_string($value) ? trim($value, '\'"') : null;
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}
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}
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}
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// if the class attribute specified
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if (isset($segments[ 'classes' ])) {
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$classes = trim($segments[ 'classes' ], '.');
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$classes = explode('.', $classes);
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foreach ($classes as $class) {
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if ($class !== '') {
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$result[ 'classes' ][] = $class;
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}
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}
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}
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// if the pseudo class specified
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if (isset($segments[ 'pseudo' ]) and $segments[ 'pseudo' ] !== '') {
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$result[ 'pseudo' ] = $segments[ 'pseudo' ];
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if (isset($segments[ 'expr' ]) and $segments[ 'expr' ] !== '') {
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$result[ 'expr' ] = $segments[ 'expr' ];
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}
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}
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// if it is a direct descendant
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if (isset($segments[ 'rel' ])) {
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$result[ 'rel' ] = $segments[ 'rel' ];
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}
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return $result;
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}
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throw new RuntimeException('HTML_E_INVALID_SELECTOR');
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}
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// ------------------------------------------------------------------------
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/**
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* XPath::generateExpression
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*
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* @param array $segments
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* @param string $prefix Specifies the nesting of nodes
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*
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* @return string XPath expression
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*
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* @throws InvalidArgumentException if you neither specify tag name nor attributes
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*/
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313
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private function generateExpression($segments, $prefix = '//')
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314
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{
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315
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|
|
$tagName = isset($segments[ 'tag' ]) ? $segments[ 'tag' ] : '*';
|
|
316
|
|
|
|
|
317
|
|
|
$attributes = [];
|
|
318
|
|
|
|
|
319
|
|
|
// if the id attribute specified
|
|
320
|
|
|
if (isset($segments[ 'id' ])) {
|
|
321
|
|
|
$attributes[] = sprintf('@id="%s"', $segments[ 'id' ]);
|
|
322
|
|
|
}
|
|
323
|
|
|
|
|
324
|
|
|
// if the class attribute specified
|
|
325
|
|
|
if (isset($segments[ 'classes' ])) {
|
|
326
|
|
|
foreach ($segments[ 'classes' ] as $class) {
|
|
327
|
|
|
$attributes[] = sprintf('contains(concat(" ", normalize-space(@class), " "), " %s ")', $class);
|
|
328
|
|
|
}
|
|
329
|
|
|
}
|
|
330
|
|
|
|
|
331
|
|
|
// if the attributes specified
|
|
332
|
|
|
if (isset($segments[ 'attributes' ])) {
|
|
333
|
|
|
foreach ($segments[ 'attributes' ] as $name => $value) {
|
|
334
|
|
|
$attributes[] = $this->fetchCssAttributeSelector($name, $value);
|
|
335
|
|
|
}
|
|
336
|
|
|
}
|
|
337
|
|
|
|
|
338
|
|
|
// if the pseudo class specified
|
|
339
|
|
|
if (isset($segments[ 'pseudo' ])) {
|
|
340
|
|
|
$expression = isset($segments[ 'expr' ]) ? trim($segments[ 'expr' ]) : '';
|
|
341
|
|
|
|
|
342
|
|
|
$parameters = explode(',', $expression);
|
|
343
|
|
|
|
|
344
|
|
|
$attributes[] = $this->fetchCssPseudoSelector($segments[ 'pseudo' ], $parameters, $tagName);
|
|
345
|
|
|
}
|
|
346
|
|
|
|
|
347
|
|
|
if (count($attributes) === 0 and ! isset($segments[ 'tag' ])) {
|
|
348
|
|
|
throw new InvalidArgumentException(
|
|
349
|
|
|
'The array of segments should contain the name of the tag or at least one attribute'
|
|
350
|
|
|
);
|
|
351
|
|
|
}
|
|
352
|
|
|
|
|
353
|
|
|
$xpath = $prefix . $tagName;
|
|
354
|
|
|
|
|
355
|
|
|
if ($count = count($attributes)) {
|
|
356
|
|
|
$xpath .= ($count > 1)
|
|
357
|
|
|
? sprintf('[(%s)]', implode(') and (', $attributes))
|
|
358
|
|
|
: sprintf(
|
|
359
|
|
|
'[%s]',
|
|
360
|
|
|
$attributes[ 0 ]
|
|
361
|
|
|
);
|
|
362
|
|
|
}
|
|
363
|
|
|
|
|
364
|
|
|
return $xpath;
|
|
365
|
|
|
}
|
|
366
|
|
|
|
|
367
|
|
|
// ------------------------------------------------------------------------
|
|
368
|
|
|
|
|
369
|
|
|
/**
|
|
370
|
|
|
* XPath::fetchCssAttributeSelector
|
|
371
|
|
|
*
|
|
372
|
|
|
* @param string $name The attribute name
|
|
373
|
|
|
* @param string $value The attribute value
|
|
374
|
|
|
*
|
|
375
|
|
|
* @return string
|
|
376
|
|
|
*/
|
|
377
|
|
|
protected function fetchCssAttributeSelector($name, $value)
|
|
378
|
|
|
{
|
|
379
|
|
|
// if the attribute name starts with ^
|
|
380
|
|
|
// example: *[^data-]
|
|
381
|
|
|
if (substr($name, 0, 1) === '^') {
|
|
382
|
|
|
$xpath = sprintf('@*[starts-with(name(), "%s")]', substr($name, 1));
|
|
383
|
|
|
|
|
384
|
|
|
return $value === null ? $xpath : sprintf('%s="%s"', $xpath, $value);
|
|
|
|
|
|
|
385
|
|
|
}
|
|
386
|
|
|
|
|
387
|
|
|
// if the attribute name starts with !
|
|
388
|
|
|
// example: input[!disabled]
|
|
389
|
|
|
if (substr($name, 0, 1) === '!') {
|
|
390
|
|
|
$xpath = sprintf('not(@%s)', substr($name, 1));
|
|
391
|
|
|
|
|
392
|
|
|
return $xpath;
|
|
393
|
|
|
}
|
|
394
|
|
|
|
|
395
|
|
|
switch (substr($name, -1)) {
|
|
396
|
|
|
case '^':
|
|
397
|
|
|
$xpath = sprintf('starts-with(@%s, "%s")', substr($name, 0, -1), $value);
|
|
398
|
|
|
break;
|
|
399
|
|
|
case '$':
|
|
400
|
|
|
$xpath = sprintf('ends-with(@%s, "%s")', substr($name, 0, -1), $value);
|
|
401
|
|
|
break;
|
|
402
|
|
|
case '*':
|
|
403
|
|
|
$xpath = sprintf('contains(@%s, "%s")', substr($name, 0, -1), $value);
|
|
404
|
|
|
break;
|
|
405
|
|
|
case '!':
|
|
406
|
|
|
$xpath = sprintf('not(@%s="%s")', substr($name, 0, -1), $value);
|
|
407
|
|
|
break;
|
|
408
|
|
|
case '~':
|
|
409
|
|
|
$xpath = sprintf(
|
|
410
|
|
|
'contains(concat(" ", normalize-space(@%s), " "), " %s ")',
|
|
411
|
|
|
substr($name, 0, -1),
|
|
412
|
|
|
$value
|
|
413
|
|
|
);
|
|
414
|
|
|
break;
|
|
415
|
|
|
default:
|
|
416
|
|
|
// if specified only the attribute name
|
|
417
|
|
|
$xpath = $value === null ? '@' . $name : sprintf('@%s="%s"', $name, $value);
|
|
|
|
|
|
|
418
|
|
|
break;
|
|
419
|
|
|
}
|
|
420
|
|
|
|
|
421
|
|
|
return $xpath;
|
|
422
|
|
|
}
|
|
423
|
|
|
|
|
424
|
|
|
// ------------------------------------------------------------------------
|
|
425
|
|
|
|
|
426
|
|
|
/**
|
|
427
|
|
|
* XPath::fetchCssPseudoSelector
|
|
428
|
|
|
*
|
|
429
|
|
|
* Converts a CSS pseudo-class into an XPath expression.
|
|
430
|
|
|
*
|
|
431
|
|
|
* @param string $pseudo Pseudo-class
|
|
432
|
|
|
* @param array $parameters
|
|
433
|
|
|
* @param string $tagName
|
|
434
|
|
|
*
|
|
435
|
|
|
* @return string
|
|
436
|
|
|
*
|
|
437
|
|
|
* @throws \RuntimeException if passed an unknown pseudo-class
|
|
438
|
|
|
*/
|
|
439
|
|
|
protected function fetchCssPseudoSelector($pseudo, $parameters = [], &$tagName)
|
|
440
|
|
|
{
|
|
441
|
|
|
switch ($pseudo) {
|
|
442
|
|
|
case 'first-child':
|
|
443
|
|
|
return 'position() = 1';
|
|
444
|
|
|
break;
|
|
|
|
|
|
|
445
|
|
|
case 'last-child':
|
|
446
|
|
|
return 'position() = last()';
|
|
447
|
|
|
break;
|
|
448
|
|
|
case 'nth-child':
|
|
449
|
|
|
$xpath = sprintf(
|
|
450
|
|
|
'(name()="%s") and (%s)',
|
|
451
|
|
|
$tagName,
|
|
452
|
|
|
$this->fetchCssPseudoNthSelector($parameters[ 0 ])
|
|
453
|
|
|
);
|
|
454
|
|
|
$tagName = '*';
|
|
455
|
|
|
|
|
456
|
|
|
return $xpath;
|
|
457
|
|
|
break;
|
|
458
|
|
|
case 'contains':
|
|
459
|
|
|
$string = trim($parameters[ 0 ], ' \'"');
|
|
460
|
|
|
$caseSensitive = isset($parameters[ 1 ]) and (trim($parameters[ 1 ]) === 'true');
|
|
461
|
|
|
|
|
462
|
|
|
return $this->fetchCssPseudoContainsSelector($string, $caseSensitive);
|
|
463
|
|
|
break;
|
|
464
|
|
|
case 'has':
|
|
465
|
|
|
return $this->fetchCssExpression($parameters[ 0 ], './/');
|
|
466
|
|
|
break;
|
|
467
|
|
|
case 'not':
|
|
468
|
|
|
return sprintf('not($this->%s)', $this->fetchCssExpression($parameters[ 0 ], ''));
|
|
469
|
|
|
break;
|
|
470
|
|
|
case 'nth-of-type':
|
|
471
|
|
|
return $this->fetchCssPseudoNthSelector($parameters[ 0 ]);
|
|
472
|
|
|
break;
|
|
473
|
|
|
case 'empty':
|
|
474
|
|
|
return 'count(descendant::*) = 0';
|
|
475
|
|
|
break;
|
|
476
|
|
|
case 'not-empty':
|
|
477
|
|
|
return 'count(descendant::*) > 0';
|
|
478
|
|
|
break;
|
|
479
|
|
|
}
|
|
480
|
|
|
|
|
481
|
|
|
throw new RuntimeException('Invalid selector: unknown pseudo-class');
|
|
482
|
|
|
}
|
|
483
|
|
|
|
|
484
|
|
|
// ------------------------------------------------------------------------
|
|
485
|
|
|
|
|
486
|
|
|
/**
|
|
487
|
|
|
* XPath::fetchCssPseudoNthSelector
|
|
488
|
|
|
*
|
|
489
|
|
|
* Converts nth-expression into an XPath expression.
|
|
490
|
|
|
*
|
|
491
|
|
|
* @param string $expression nth-expression
|
|
492
|
|
|
*
|
|
493
|
|
|
* @return string
|
|
494
|
|
|
*
|
|
495
|
|
|
* @throws \RuntimeException if passed nth-child is empty
|
|
496
|
|
|
* @throws \RuntimeException if passed an unknown nth-child expression
|
|
497
|
|
|
*/
|
|
498
|
|
|
protected function fetchCssPseudoNthSelector($expression)
|
|
499
|
|
|
{
|
|
500
|
|
|
if ($expression === '') {
|
|
501
|
|
|
throw new RuntimeException(
|
|
502
|
|
|
'Invalid selector: nth-child (or nth-last-child) expression must not be empty'
|
|
503
|
|
|
);
|
|
504
|
|
|
}
|
|
505
|
|
|
|
|
506
|
|
|
if ($expression === 'odd') {
|
|
507
|
|
|
return 'position() mod 2 = 1 and position() >= 1';
|
|
508
|
|
|
}
|
|
509
|
|
|
|
|
510
|
|
|
if ($expression === 'even') {
|
|
511
|
|
|
return 'position() mod 2 = 0 and position() >= 0';
|
|
512
|
|
|
}
|
|
513
|
|
|
|
|
514
|
|
|
if (is_numeric($expression)) {
|
|
515
|
|
|
return sprintf('position() = %d', $expression);
|
|
516
|
|
|
}
|
|
517
|
|
|
|
|
518
|
|
|
if (preg_match("/^(?P<mul>[0-9]?n)(?:(?P<sign>\+|\-)(?P<pos>[0-9]+))?$/is", $expression, $segments)) {
|
|
519
|
|
|
if (isset($segments[ 'mul' ])) {
|
|
520
|
|
|
$multiplier = $segments[ 'mul' ] === 'n' ? 1 : trim($segments[ 'mul' ], 'n');
|
|
521
|
|
|
$sign = (isset($segments[ 'sign' ]) and $segments[ 'sign' ] === '+') ? '-' : '+';
|
|
522
|
|
|
$position = isset($segments[ 'pos' ]) ? $segments[ 'pos' ] : 0;
|
|
523
|
|
|
|
|
524
|
|
|
return sprintf(
|
|
525
|
|
|
'(position() %s %d) mod %d = 0 and position() >= %d',
|
|
526
|
|
|
$sign,
|
|
527
|
|
|
$position,
|
|
528
|
|
|
$multiplier,
|
|
529
|
|
|
$position
|
|
530
|
|
|
);
|
|
531
|
|
|
}
|
|
532
|
|
|
}
|
|
533
|
|
|
|
|
534
|
|
|
throw new RuntimeException('Invalid selector: invalid nth-child expression');
|
|
535
|
|
|
}
|
|
536
|
|
|
|
|
537
|
|
|
// ------------------------------------------------------------------------
|
|
538
|
|
|
|
|
539
|
|
|
/**
|
|
540
|
|
|
* XPath::fetchCssPseudoContainsSelector
|
|
541
|
|
|
*
|
|
542
|
|
|
* @param string $string
|
|
543
|
|
|
* @param bool $caseSensitive
|
|
544
|
|
|
*
|
|
545
|
|
|
* @return string
|
|
546
|
|
|
*/
|
|
547
|
|
|
protected function fetchCssPseudoContainsSelector($string, $caseSensitive = false)
|
|
548
|
|
|
{
|
|
549
|
|
|
if ($caseSensitive) {
|
|
550
|
|
|
return sprintf('text() = "%s"', $string);
|
|
551
|
|
|
}
|
|
552
|
|
|
|
|
553
|
|
|
if (function_exists('mb_strtolower')) {
|
|
554
|
|
|
return sprintf(
|
|
555
|
|
|
'php:functionString("mb_strtolower", .) = php:functionString("mb_strtolower", "%s")',
|
|
556
|
|
|
$string
|
|
557
|
|
|
);
|
|
558
|
|
|
} else {
|
|
559
|
|
|
return sprintf('php:functionString("strtolower", .) = php:functionString("strtolower", "%s")', $string);
|
|
560
|
|
|
}
|
|
561
|
|
|
}
|
|
562
|
|
|
} |
o2system /
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