Файл: library/Zend/Dom/Query.php
Строк: 374
<?php
/**
* Zend Framework
*
* LICENSE
*
* This source file is subject to the new BSD license that is bundled
* with this package in the file LICENSE.txt.
* It is also available through the world-wide-web at this URL:
* http://framework.zend.com/license/new-bsd
* If you did not receive a copy of the license and are unable to
* obtain it through the world-wide-web, please send an email
* to license@zend.com so we can send you a copy immediately.
*
* @category Zend
* @package Zend_Dom
* @copyright Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
* @version $Id: Query.php 23062 2010-10-08 14:05:45Z matthew $
*/
/**
* @see Zend_Dom_Query_Css2Xpath
*/
require_once 'Zend/Dom/Query/Css2Xpath.php';
/**
* @see Zend_Dom_Query_Result
*/
require_once 'Zend/Dom/Query/Result.php';
/**
* Query DOM structures based on CSS selectors and/or XPath
*
* @package Zend_Dom
* @subpackage Query
* @copyright Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
class Zend_Dom_Query
{
/**#@+
* Document types
*/
const DOC_XML = 'docXml';
const DOC_HTML = 'docHtml';
const DOC_XHTML = 'docXhtml';
/**#@-*/
/**
* @var string
*/
protected $_document;
/**
* DOMDocument errors, if any
* @var false|array
*/
protected $_documentErrors = false;
/**
* Document type
* @var string
*/
protected $_docType;
/**
* Document encoding
* @var null|string
*/
protected $_encoding;
/**
* XPath namespaces
* @var array
*/
protected $_xpathNamespaces = array();
/**
* Constructor
*
* @param null|string $document
* @return void
*/
public function __construct($document = null, $encoding = null)
{
$this->setEncoding($encoding);
$this->setDocument($document);
}
/**
* Set document encoding
*
* @param string $encoding
* @return Zend_Dom_Query
*/
public function setEncoding($encoding)
{
$this->_encoding = (null === $encoding) ? null : (string) $encoding;
return $this;
}
/**
* Get document encoding
*
* @return null|string
*/
public function getEncoding()
{
return $this->_encoding;
}
/**
* Set document to query
*
* @param string $document
* @param null|string $encoding Document encoding
* @return Zend_Dom_Query
*/
public function setDocument($document, $encoding = null)
{
if (0 === strlen($document)) {
return $this;
}
// breaking XML declaration to make syntax highlighting work
if ('<' . '?xml' == substr(trim($document), 0, 5)) {
return $this->setDocumentXml($document, $encoding);
}
if (strstr($document, 'DTD XHTML')) {
return $this->setDocumentXhtml($document, $encoding);
}
return $this->setDocumentHtml($document, $encoding);
}
/**
* Register HTML document
*
* @param string $document
* @param null|string $encoding Document encoding
* @return Zend_Dom_Query
*/
public function setDocumentHtml($document, $encoding = null)
{
$this->_document = (string) $document;
$this->_docType = self::DOC_HTML;
if (null !== $encoding) {
$this->setEncoding($encoding);
}
return $this;
}
/**
* Register XHTML document
*
* @param string $document
* @param null|string $encoding Document encoding
* @return Zend_Dom_Query
*/
public function setDocumentXhtml($document, $encoding = null)
{
$this->_document = (string) $document;
$this->_docType = self::DOC_XHTML;
if (null !== $encoding) {
$this->setEncoding($encoding);
}
return $this;
}
/**
* Register XML document
*
* @param string $document
* @param null|string $encoding Document encoding
* @return Zend_Dom_Query
*/
public function setDocumentXml($document, $encoding = null)
{
$this->_document = (string) $document;
$this->_docType = self::DOC_XML;
if (null !== $encoding) {
$this->setEncoding($encoding);
}
return $this;
}
/**
* Retrieve current document
*
* @return string
*/
public function getDocument()
{
return $this->_document;
}
/**
* Get document type
*
* @return string
*/
public function getDocumentType()
{
return $this->_docType;
}
/**
* Get any DOMDocument errors found
*
* @return false|array
*/
public function getDocumentErrors()
{
return $this->_documentErrors;
}
/**
* Perform a CSS selector query
*
* @param string $query
* @return Zend_Dom_Query_Result
*/
public function query($query)
{
$xpathQuery = Zend_Dom_Query_Css2Xpath::transform($query);
return $this->queryXpath($xpathQuery, $query);
}
/**
* Perform an XPath query
*
* @param string|array $xpathQuery
* @param string $query CSS selector query
* @return Zend_Dom_Query_Result
*/
public function queryXpath($xpathQuery, $query = null)
{
if (null === ($document = $this->getDocument())) {
require_once 'Zend/Dom/Exception.php';
throw new Zend_Dom_Exception('Cannot query; no document registered');
}
$encoding = $this->getEncoding();
libxml_use_internal_errors(true);
if (null === $encoding) {
$domDoc = new DOMDocument('1.0');
} else {
$domDoc = new DOMDocument('1.0', $encoding);
}
$type = $this->getDocumentType();
switch ($type) {
case self::DOC_XML:
$success = $domDoc->loadXML($document);
break;
case self::DOC_HTML:
case self::DOC_XHTML:
default:
$success = $domDoc->loadHTML($document);
break;
}
$errors = libxml_get_errors();
if (!empty($errors)) {
$this->_documentErrors = $errors;
libxml_clear_errors();
}
libxml_use_internal_errors(false);
if (!$success) {
require_once 'Zend/Dom/Exception.php';
throw new Zend_Dom_Exception(sprintf('Error parsing document (type == %s)', $type));
}
$nodeList = $this->_getNodeList($domDoc, $xpathQuery);
return new Zend_Dom_Query_Result($query, $xpathQuery, $domDoc, $nodeList);
}
/**
* Register XPath namespaces
*
* @param array $xpathNamespaces
* @return void
*/
public function registerXpathNamespaces($xpathNamespaces)
{
$this->_xpathNamespaces = $xpathNamespaces;
}
/**
* Prepare node list
*
* @param DOMDocument $document
* @param string|array $xpathQuery
* @return array
*/
protected function _getNodeList($document, $xpathQuery)
{
$xpath = new DOMXPath($document);
foreach ($this->_xpathNamespaces as $prefix => $namespaceUri) {
$xpath->registerNamespace($prefix, $namespaceUri);
}
$xpathQuery = (string) $xpathQuery;
if (preg_match_all('|[contains((@[a-z0-9_-]+),s?' |i', $xpathQuery, $matches)) {
foreach ($matches[1] as $attribute) {
$queryString = '//*[' . $attribute . ']';
$attributeName = substr($attribute, 1);
$nodes = $xpath->query($queryString);
foreach ($nodes as $node) {
$attr = $node->attributes->getNamedItem($attributeName);
$attr->value = ' ' . $attr->value . ' ';
}
}
}
return $xpath->query($xpathQuery);
}
}