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<?php
/** @file
* XML extensions. See QPXML.
*/
/**
* Provide QueryPath with additional XML tools.
*
* @author M Butcher <matt@aleph-null.tv>
* @author Xander Guzman <theshadow@shadowpedia.info>
* @license http://opensource.org/licenses/lgpl-2.1.php LGPL or MIT-like license.
* @see QueryPathExtension
* @see QueryPathExtensionRegistry::extend()
* @see QPXML
* @ingroup querypath_extensions
*/
class QPXML implements QueryPathExtension {
protected $qp;
public function __construct(QueryPath $qp) {
$this->qp = $qp;
}
public function schema($file) {
$doc = $this->qp->branch()->top()->get(0)->ownerDocument;
if (!$doc->schemaValidate($file)) {
throw new QueryPathException('Document did not validate against the schema.');
}
}
/**
* Get or set a CDATA section.
*
* If this is given text, it will create a CDATA section in each matched element,
* setting that item's value to $text.
*
* If no parameter is passed in, this will return the first CDATA section that it
* finds in the matched elements.
*
* @param string $text
* The text data to insert into the current matches. If this is NULL, then the first
* CDATA will be returned.
*
* @return mixed
* If $text is not NULL, this will return a {@link QueryPath}. Otherwise, it will
* return a string. If no CDATA is found, this will return NULL.
* @see comment()
* @see QueryPath::text()
* @see QueryPath::html()
*/
public function cdata($text = NULL) {
if (isset($text)) {
// Add this text as CDATA in the current elements.
foreach ($this->qp->get() as $element) {
$cdata = $element->ownerDocument->createCDATASection($text);
$element->appendChild($cdata);
}
return $this->qp;;
}
// Look for CDATA sections.
foreach ($this->qp->get() as $ele) {
foreach ($ele->childNodes as $node) {
if ($node->nodeType == XML_CDATA_SECTION_NODE) {
// Return first match.
return $node->textContent;
}
}
}
return NULL;
// Nothing found
}
/**
* Get or set a comment.
*
* This function is used to get or set comments in an XML or HTML document.
* If a $text value is passed in (and is not NULL), then this will add a comment
* (with the value $text) to every match in the set.
*
* If no text is passed in, this will return the first comment in the set of matches.
* If no comments are found, NULL will be returned.
*
* @param string $text
* The text of the comment. If set, a new comment will be created in every item
* wrapped by the current {@link QueryPath}.
* @return mixed
* If $text is set, this will return a {@link QueryPath}. If no text is set, this
* will search for a comment and attempt to return the string value of the first
* comment it finds. If no comment is found, NULL will be returned.
* @see cdata()
*/
public function comment($text = NULL) {
if (isset($text)) {
foreach ($this->qp->get() as $element) {
$comment = $element->ownerDocument->createComment($text);
$element->appendChild($comment);
}
return $this->qp;
}
foreach ($this->qp->get() as $ele) {
foreach ($ele->childNodes as $node) {
if ($node->nodeType == XML_COMMENT_NODE) {
// Return first match.
return $node->textContent;
}
}
}
}
/**
* Get or set a processor instruction.
*/
public function pi($prefix = NULL, $text = NULL) {
if (isset($text)) {
foreach ($this->qp->get() as $element) {
$comment = $element->ownerDocument->createProcessingInstruction($prefix, $text);
$element->appendChild($comment);
}
return $this->qp;
}
foreach ($this->qp->get() as $ele) {
foreach ($ele->childNodes as $node) {
if ($node->nodeType == XML_PI_NODE) {
if (isset($prefix)) {
if ($node->tagName == $prefix) {
return $node->textContent;
}
}
else {
// Return first match.
return $node->textContent;
}
}
} // foreach
} // foreach
}
public function toXml() {
return $this->qp->document()->saveXml();
}
/**
* Create a NIL element.
*
* @param string $text
* @param string $value
* @reval object $element
*/
public function createNilElement($text, $value) {
$value = ($value)? 'true':'false';
$element = $this->qp->createElement($text);
$element->attr('xsi:nil', $value);
return $element;
}
/**
* Create an element with the given namespace.
*
* @param string $text
* @param string $nsUri
* The namespace URI for the given element.
* @retval object
*/
public function createElement($text, $nsUri = null) {
if (isset ($text)) {
foreach ($this->qp->get() as $element) {
if ($nsUri === null && strpos($text, ':') !== false) {
$ns = array_shift(explode(':', $text));
$nsUri = $element->ownerDocument->lookupNamespaceURI($ns);
if ($nsUri === null) {
throw new QueryPathException("Undefined namespace for: " . $text);
}
}
$node = null;
if ($nsUri !== null) {
$node = $element->ownerDocument->createElementNS(
$nsUri,
$text
);
} else {
$node = $element->ownerDocument->createElement($text);
}
return qp($node);
}
}
return;
}
/**
* Append an element.
*
* @param string $text
* @retval object QueryPath
*/
public function appendElement($text) {
if (isset ($text)) {
foreach ($this->qp->get() as $element) {
$node = $this->qp->createElement($text);
qp($element)->append($node);
}
}
return $this->qp;
}
}
QueryPathExtensionRegistry::extend('QPXML');
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