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[CssSelector] added the component
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‎src/Symfony/Components/CssSelector/Node/AttribNode.php

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<?php
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namespace Symfony\Components\CssSelector\Node;
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use Symfony\Components\CssSelector\XPathExpr;
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use Symfony\Components\CssSelector\SyntaxError;
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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.potencier@symfony-project.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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/**
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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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* @package symfony
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* @subpackage css_selector
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* @author Fabien Potencier <fabien.potencier@symfony-project.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 $value;
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public function __construct($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 = $value;
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}
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public function __toString()
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{
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if ($this->operator == 'exists')
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{
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return sprintf('%s[%s[%s]]', __CLASS__, $this->selector, $this->formatAttrib());
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}
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else
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{
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return sprintf('%s[%s[%s %s %s]]', __CLASS__, $this->selector, $this->formatAttrib(), $this->operator, $this->value);
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}
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}
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public function toXpath()
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{
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$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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{
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$path->addCondition($attrib);
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}
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elseif ($this->operator == '=')
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{
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$path->addCondition(sprintf('%s = %s', $attrib, XPathExpr::xpathLiteral($value)));
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}
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elseif ($this->operator == '!=')
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{
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# FIXME: this seems like a weird hack...
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if ($value)
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{
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$path->addCondition(sprintf('not(%s) or %s != %s', $attrib, $attrib, XPathExpr::xpathLiteral($value)));
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}
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else
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{
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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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}
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elseif ($this->operator == '~=')
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{
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$path->addCondition(sprintf("contains(concat(' ', normalize-space(%s), ' '), %s)", $attrib, XPathExpr::xpathLiteral(' '.$value.' ')));
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}
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elseif ($this->operator == '|=')
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{
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# Weird, but true...
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$path->addCondition(sprintf('%s = %s or starts-with(%s, %s)', $attrib, XPathExpr::xpathLiteral($value), $attrib, XPathExpr::xpathLiteral($value.'-')));
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}
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elseif ($this->operator == '^=')
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{
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$path->addCondition(sprintf('starts-with(%s, %s)', $attrib, XPathExpr::xpathLiteral($value)));
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}
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elseif ($this->operator == '$=')
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{
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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($value)));
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}
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elseif ($this->operator == '*=')
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{
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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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}
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else
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{
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throw new SyntaxError(sprintf("Unknown operator: %s", $this->operator));
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}
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return $path;
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}
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protected function xpathAttrib()
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{
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# FIXME: if attrib is *?
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if ($this->namespace == '*')
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{
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return '@'.$this->attrib;
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}
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else
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{
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return sprintf('@%s:%s', $this->namespace, $this->attrib);
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}
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}
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protected function formatAttrib()
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{
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if ($this->namespace == '*')
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{
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return $this->attrib;
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}
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else
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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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}

‎src/Symfony/Components/CssSelector/Node/ClassNode.php

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<?php
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namespace Symfony\Components\CssSelector\Node;
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use Symfony\Components\CssSelector\XPathExpr;
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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.potencier@symfony-project.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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/**
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* ClassNode represents a "selector.className" 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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* @package symfony
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* @subpackage css_selector
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* @author Fabien Potencier <fabien.potencier@symfony-project.com>
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*/
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class ClassNode implements NodeInterface
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{
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protected $selector;
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protected $className;
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public function __construct($selector, $className)
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{
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$this->selector = $selector;
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$this->className = $className;
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}
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public function __toString()
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{
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return sprintf('%s[%s.%s]', __CLASS__, $this->selector, $this->className);
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}
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public function toXpath()
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{
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$selXpath = $this->selector->toXpath();
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$selXpath->addCondition(sprintf("contains(concat(' ', normalize-space(@class), ' '), %s)", XPathExpr::xpathLiteral(' '.$this->className.' ')));
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return $selXpath;
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}
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}

‎src/Symfony/Components/CssSelector/Node/CombinedSelectorNode.php

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<?php
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namespace Symfony\Components\CssSelector\Node;
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use Symfony\Components\CssSelector\SyntaxError;
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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.potencier@symfony-project.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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/**
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* CombinedSelectorNode represents a combinator 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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* @package symfony
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* @subpackage css_selector
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* @author Fabien Potencier <fabien.potencier@symfony-project.com>
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*/
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class CombinedSelectorNode implements NodeInterface
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{
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static protected $_method_mapping = array(
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' ' => 'descendant',
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'>' => 'child',
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'+' => 'direct_adjacent',
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'~' => 'indirect_adjacent',
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);
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protected $selector;
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protected $combinator;
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protected $subselector;
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public function __construct($selector, $combinator, $subselector)
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{
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$this->selector = $selector;
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$this->combinator = $combinator;
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$this->subselector = $subselector;
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}
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public function __toString()
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{
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$comb = $this->combinator == ' ' ? '<followed>' : $this->combinator;
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return sprintf('%s[%s %s %s]', __CLASS__, $this->selector, $comb, $this->subselector);
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}
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public function toXpath()
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{
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if (!isset(self::$_method_mapping[$this->combinator]))
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{
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throw new SyntaxError(sprintf("Unknown combinator: %s", $this->combinator));
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}
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$method = '_xpath_'.self::$_method_mapping[$this->combinator];
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$path = $this->selector->toXpath();
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return $this->$method($path, $this->subselector);
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}
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protected function _xpath_descendant($xpath, $sub)
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{
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# when sub is a descendant in any way of xpath
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$xpath->join('/descendant::', $sub->toXpath());
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return $xpath;
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}
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protected function _xpath_child($xpath, $sub)
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{
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# when sub is an immediate child of xpath
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$xpath->join('/', $sub->toXpath());
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return $xpath;
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}
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protected function _xpath_direct_adjacent($xpath, $sub)
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{
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# when sub immediately follows xpath
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$xpath->join('/following-sibling::', $sub->toXpath());
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$xpath->addNameTest();
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$xpath->addCondition('position() = 1');
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return $xpath;
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}
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protected function _xpath_indirect_adjacent($xpath, $sub)
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{
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# when sub comes somewhere after xpath as a sibling
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$xpath->join('/following-sibling::', $sub->toXpath());
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return $xpath;
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}
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}

‎src/Symfony/Components/CssSelector/Node/ElementNode.php

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<?php
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namespace Symfony\Components\CssSelector\Node;
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use Symfony\Components\CssSelector\XPathExpr;
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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.potencier@symfony-project.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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/**
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* ElementNode represents a "namespace|element" 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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* @package symfony
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* @subpackage css_selector
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* @author Fabien Potencier <fabien.potencier@symfony-project.com>
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*/
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class ElementNode implements NodeInterface
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{
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protected $namespace;
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protected $element;
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public function __construct($namespace, $element)
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{
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$this->namespace = $namespace;
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$this->element = $element;
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}
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public function __toString()
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{
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return sprintf('%s[%s]', __CLASS__, $this->formatElement());
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}
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public function formatElement()
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{
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if ($this->namespace == '*')
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{
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return $this->element;
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}
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else
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{
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return sprintf('%s|%s', $this->namespace, $this->element);
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}
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}
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public function toXpath()
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{
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if ($this->namespace == '*')
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{
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$el = strtolower($this->element);
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}
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else
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{
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# FIXME: Should we lowercase here?
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$el = sprintf('%s:%s', $this->namespace, $this->element);
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}
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return new XPathExpr(null, null, $el);
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}
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}

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