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<?php
/**
* @file
* This houses the class formerly called QueryPath.
*
* As of QueryPath 3.0.0, the class was renamed QueryPath::DOMQuery. This
* was done for a few reasons:
* - The library has been refactored, and it made more sense to call the top
* level class QueryPath. This is not the top level class.
* - There have been requests for a JSONQuery class, which would be the
* natural complement of DOMQuery.
*/
namespace QueryPath;
use \QueryPath\CSS\QueryPathEventHandler;
use \QueryPath;
use \Masterminds\HTML5;
/**
* The DOMQuery object is the primary tool in this library.
*
* To create a new DOMQuery, use QueryPath::with() or qp() function.
*
* If you are new to these documents, start at the QueryPath.php page.
* There you will find a quick guide to the tools contained in this project.
*
* A note on serialization: DOMQuery uses DOM classes internally, and those
* do not serialize well at all. In addition, DOMQuery may contain many
* extensions, and there is no guarantee that extensions can serialize. The
* moral of the story: Don't serialize DOMQuery.
*
* @see qp()
* @see QueryPath.php
* @ingroup querypath_core
*/
class DOMQuery implements \QueryPath\Query, \IteratorAggregate, \Countable {
/**
* Default parser flags.
*
* These are flags that will be used if no global or local flags override them.
* @since 2.0
*/
const DEFAULT_PARSER_FLAGS = NULL;
const JS_CSS_ESCAPE_CDATA = '\\1';
const JS_CSS_ESCAPE_CDATA_CCOMMENT = '/* \\1 */';
const JS_CSS_ESCAPE_CDATA_DOUBLESLASH = '// \\1';
const JS_CSS_ESCAPE_NONE = '';
//const IGNORE_ERRORS = 1544; //E_NOTICE | E_USER_WARNING | E_USER_NOTICE;
private $errTypes = 771; //E_ERROR; | E_USER_ERROR;
/**
* The base DOMDocument.
*/
protected $document = NULL;
private $options = array(
'parser_flags' => NULL,
'omit_xml_declaration' => FALSE,
'replace_entities' => FALSE,
'exception_level' => 771, // E_ERROR | E_USER_ERROR | E_USER_WARNING | E_WARNING
'ignore_parser_warnings' => FALSE,
'escape_xhtml_js_css_sections' => self::JS_CSS_ESCAPE_CDATA_CCOMMENT,
);
/**
* The array of matches.
*/
protected $matches = array();
/**
* The last array of matches.
*/
protected $last = array(); // Last set of matches.
private $ext = array(); // Extensions array.
/**
* The number of current matches.
*
* @see count()
*/
public $length = 0;
/**
* Constructor.
*
* Typically, a new DOMQuery is created by QueryPath::with(), QueryPath::withHTML(),
* qp(), or htmlqp().
*
* @param mixed $document
* A document-like object.
* @param string $string
* A CSS 3 Selector
* @param array $options
* An associative array of options.
* @see qp()
*/
public function __construct($document = NULL, $string = NULL, $options = array()) {
$string = trim($string);
$this->options = $options + Options::get() + $this->options;
$parser_flags = isset($options['parser_flags']) ? $options['parser_flags'] : self::DEFAULT_PARSER_FLAGS;
if (!empty($this->options['ignore_parser_warnings'])) {
// Don't convert parser warnings into exceptions.
$this->errTypes = 257; //E_ERROR | E_USER_ERROR;
}
elseif (isset($this->options['exception_level'])) {
// Set the error level at which exceptions will be thrown. By default,
// QueryPath will throw exceptions for
// E_ERROR | E_USER_ERROR | E_WARNING | E_USER_WARNING.
$this->errTypes = $this->options['exception_level'];
}
// Empty: Just create an empty QP.
if (empty($document)) {
$this->document = isset($this->options['encoding']) ? new \DOMDocument('1.0', $this->options['encoding']) : new \DOMDocument();
$this->setMatches(new \SplObjectStorage());
}
// Figure out if document is DOM, HTML/XML, or a filename
elseif (is_object($document)) {
// This is the most frequent object type.
if ($document instanceof \SplObjectStorage) {
$this->matches = $document;
if ($document->count() != 0) {
$first = $this->getFirstMatch();
if (!empty($first->ownerDocument)) {
$this->document = $first->ownerDocument;
}
}
}
elseif ($document instanceof DOMQuery) {
//$this->matches = $document->get(NULL, TRUE);
$this->setMatches($document->get(NULL, TRUE));
if ($this->matches->count() > 0)
$this->document = $this->getFirstMatch()->ownerDocument;
}
elseif ($document instanceof \DOMDocument) {
$this->document = $document;
//$this->matches = $this->matches($document->documentElement);
$this->setMatches($document->documentElement);
}
elseif ($document instanceof \DOMNode) {
$this->document = $document->ownerDocument;
//$this->matches = array($document);
$this->setMatches($document);
}
elseif ($document instanceof \Masterminds\HTML5) {
$this->document = $document;
$this->setMatches($document->documentElement);
}
elseif ($document instanceof \SimpleXMLElement) {
$import = dom_import_simplexml($document);
$this->document = $import->ownerDocument;
//$this->matches = array($import);
$this->setMatches($import);
}
else {
throw new \QueryPath\Exception('Unsupported class type: ' . get_class($document));
}
}
elseif (is_array($document)) {
//trigger_error('Detected deprecated array support', E_USER_NOTICE);
if (!empty($document) && $document[0] instanceof \DOMNode) {
$found = new \SplObjectStorage();
foreach ($document as $item) $found->attach($item);
//$this->matches = $found;
$this->setMatches($found);
$this->document = $this->getFirstMatch()->ownerDocument;
}
}
elseif ($this->isXMLish($document)) {
// $document is a string with XML
$this->document = $this->parseXMLString($document);
$this->setMatches($this->document->documentElement);
}
else {
// $document is a filename
$context = empty($options['context']) ? NULL : $options['context'];
$this->document = $this->parseXMLFile($document, $parser_flags, $context);
$this->setMatches($this->document->documentElement);
}
// Globally set the output option.
if (isset($this->options['format_output']) && $this->options['format_output'] == FALSE) {
$this->document->formatOutput = FALSE;
}
else {
$this->document->formatOutput = TRUE;
}
// Do a find if the second param was set.
if (isset($string) && strlen($string) > 0) {
// We don't issue a find because that creates a new DOMQuery.
//$this->find($string);
$query = new \QueryPath\CSS\DOMTraverser($this->matches);
$query->find($string);
$this->setMatches($query->matches());
}
}
/**
* Get the effective options for the current DOMQuery object.
*
* This returns an associative array of all of the options as set
* for the current DOMQuery object. This includes default options,
* options directly passed in via {@link qp()} or the constructor,
* an options set in the QueryPath::Options object.
*
* The order of merging options is this:
* - Options passed in using qp() are highest priority, and will
* override other options.
* - Options set with QueryPath::Options will override default options,
* but can be overridden by options passed into qp().
* - Default options will be used when no overrides are present.
*
* This function will return the options currently used, with the above option
* overriding having been calculated already.
*
* @return array
* An associative array of options, calculated from defaults and overridden
* options.
* @see qp()
* @see QueryPath::Options::set()
* @see QueryPath::Options::merge()
* @since 2.0
*/
public function getOptions() {
return $this->options;
}
/**
* Select the root element of the document.
*
* This sets the current match to the document's root element. For
* practical purposes, this is the same as:
* @code
* qp($someDoc)->find(':root');
* @endcode
* However, since it doesn't invoke a parser, it has less overhead. It also
* works in cases where the QueryPath has been reduced to zero elements (a
* case that is not handled by find(':root') because there is no element
* whose root can be found).
*
* @param string $selector
* A selector. If this is supplied, QueryPath will navigate to the
* document root and then run the query. (Added in QueryPath 2.0 Beta 2)
* @retval object DOMQuery
* The DOMQuery object, wrapping the root element (document element)
* for the current document.
*/
public function top($selector = NULL) {
//$this->setMatches($this->document->documentElement);
//return !empty($selector) ? $this->find($selector) : $this;
return $this->inst($this->document->documentElement, $selector, $this->options);
}
/**
* Given a CSS Selector, find matching items.
*
* @param string $selector
* CSS 3 Selector
* @retval object DOMQuery
* @see filter()
* @see is()
* @todo If a find() returns zero matches, then a subsequent find() will
* also return zero matches, even if that find has a selector like :root.
* The reason for this is that the {@link QueryPathEventHandler} does
* not set the root of the document tree if it cannot find any elements
* from which to determine what the root is. The workaround is to use
* {@link top()} to select the root element again.
*/
public function find($selector) {
//$query = new QueryPathEventHandler($this->matches);
$query = new \QueryPath\CSS\DOMTraverser($this->matches);
$query->find($selector);
//$this->setMatches($query->matches());
//return $this;
return $this->inst($query->matches(), NULL , $this->options);
}
public function findInPlace($selector) {
$query = new \QueryPath\CSS\DOMTraverser($this->matches);
$query->find($selector);
$this->setMatches($query->matches());
return $this;
}
/**
* Execute an XPath query and store the results in the QueryPath.
*
* Most methods in this class support CSS 3 Selectors. Sometimes, though,
* XPath provides a finer-grained query language. Use this to execute
* XPath queries.
*
* Beware, though. DOMQuery works best on DOM Elements, but an XPath
* query can return other nodes, strings, and values. These may not work with
* other QueryPath functions (though you will be able to access the
* values with {@link get()}).
*
* @param string $query
* An XPath query.
* @param array $options
* Currently supported options are:
* - 'namespace_prefix': And XML namespace prefix to be used as the default. Used
* in conjunction with 'namespace_uri'
* - 'namespace_uri': The URI to be used as the default namespace URI. Used
* with 'namespace_prefix'
* @retval object DOMQuery
* A DOMQuery object wrapping the results of the query.
* @see find()
* @author M Butcher
* @author Xavier Prud'homme
*/
public function xpath($query, $options = array()) {
$xpath = new \DOMXPath($this->document);
// Register a default namespace.
if (!empty($options['namespace_prefix']) && !empty($options['namespace_uri'])) {
$xpath->registerNamespace($options['namespace_prefix'], $options['namespace_uri']);
}
$found = new \SplObjectStorage();
foreach ($this->matches as $item) {
$nl = $xpath->query($query, $item);
if ($nl->length > 0) {
for ($i = 0; $i < $nl->length; ++$i) $found->attach($nl->item($i));
}
}
return $this->inst($found, NULL, $this->options);
//$this->setMatches($found);
//return $this;
}
/**
* Get the number of elements currently wrapped by this object.
*
* Note that there is no length property on this object.
*
* @return int
* Number of items in the object.
* @deprecated QueryPath now implements Countable, so use count().
*/
public function size() {
return $this->matches->count();
}
/**
* Get the number of elements currently wrapped by this object.
*
* Since DOMQuery is Countable, the PHP count() function can also
* be used on a DOMQuery.
*
* @code
* <?php
* count(qp($xml, 'div'));
* ?>
* @endcode
*
* @return int
* The number of matches in the DOMQuery.
*/
public function count() {
return $this->matches->count();
}
/**
* Get one or all elements from this object.
*
* When called with no paramaters, this returns all objects wrapped by
* the DOMQuery. Typically, these are DOMElement objects (unless you have
* used map(), xpath(), or other methods that can select
* non-elements).
*
* When called with an index, it will return the item in the DOMQuery with
* that index number.
*
* Calling this method does not change the DOMQuery (e.g. it is
* non-destructive).
*
* You can use qp()->get() to iterate over all elements matched. You can
* also iterate over qp() itself (DOMQuery implementations must be Traversable).
* In the later case, though, each item
* will be wrapped in a DOMQuery object. To learn more about iterating
* in QueryPath, see {@link examples/techniques.php}.
*
* @param int $index
* If specified, then only this index value will be returned. If this
* index is out of bounds, a NULL will be returned.
* @param boolean $asObject
* If this is TRUE, an SplObjectStorage object will be returned
* instead of an array. This is the preferred method for extensions to use.
* @return mixed
* If an index is passed, one element will be returned. If no index is
* present, an array of all matches will be returned.
* @see eq()
* @see SplObjectStorage
*/
public function get($index = NULL, $asObject = FALSE) {
if (isset($index)) {
return ($this->size() > $index) ? $this->getNthMatch($index) : NULL;
}
// Retain support for legacy.
if (!$asObject) {
$matches = array();
foreach ($this->matches as $m) $matches[] = $m;
return $matches;
}
return $this->matches;
}
/**
* Get the DOMDocument that we currently work with.
*
* This returns the current DOMDocument. Any changes made to this document will be
* accessible to DOMQuery, as both will share access to the same object.
*
* @return DOMDocument
*/
public function document() {
return $this->document;
}
/**
* On an XML document, load all XIncludes.
*
* @retval object DOMQuery
*/
public function xinclude() {
$this->document->xinclude();
return $this;
}
/**
* Get all current elements wrapped in an array.
* Compatibility function for jQuery 1.4, but identical to calling {@link get()}
* with no parameters.
*
* @return array
* An array of DOMNodes (typically DOMElements).
*/
public function toArray() {
return $this->get();
}
/**
* Get/set an attribute.
* - If no parameters are specified, this returns an associative array of all
* name/value pairs.
* - If both $name and $value are set, then this will set the attribute name/value
* pair for all items in this object.
* - If $name is set, and is an array, then
* all attributes in the array will be set for all items in this object.
* - If $name is a string and is set, then the attribute value will be returned.
*
* When an attribute value is retrieved, only the attribute value of the FIRST
* match is returned.
*
* @param mixed $name
* The name of the attribute or an associative array of name/value pairs.
* @param string $value
* A value (used only when setting an individual property).
* @return mixed
* If this was a setter request, return the DOMQuery object. If this was
* an access request (getter), return the string value.
* @see removeAttr()
* @see tag()
* @see hasAttr()
* @see hasClass()
*/
public function attr($name = NULL, $value = NULL) {
// Default case: Return all attributes as an assoc array.
if (is_null($name)) {
if ($this->matches->count() == 0) return NULL;
$ele = $this->getFirstMatch();
$buffer = array();
// This does not appear to be part of the DOM
// spec. Nor is it documented. But it works.
foreach ($ele->attributes as $name => $attrNode) {
$buffer[$name] = $attrNode->value;
}
return $buffer;
}
// multi-setter
if (is_array($name)) {
foreach ($name as $k => $v) {
foreach ($this->matches as $m) $m->setAttribute($k, $v);
}
return $this;
}
// setter
if (isset($value)) {
foreach ($this->matches as $m) $m->setAttribute($name, $value);
return $this;
}
//getter
if ($this->matches->count() == 0) return NULL;
// Special node type handler:
if ($name == 'nodeType') {
return $this->getFirstMatch()->nodeType;
}
// Always return first match's attr.
return $this->getFirstMatch()->getAttribute($name);
}
/**
* Check to see if the given attribute is present.
*
* This returns TRUE if <em>all</em> selected items have the attribute, or
* FALSE if at least one item does not have the attribute.
*
* @param string $attrName
* The attribute name.
* @return boolean
* TRUE if all matches have the attribute, FALSE otherwise.
* @since 2.0
* @see attr()
* @see hasClass()
*/
public function hasAttr($attrName) {
foreach ($this->matches as $match) {
if (!$match->hasAttribute($attrName)) return FALSE;
}
return TRUE;
}
/**
* Set/get a CSS value for the current element(s).
* This sets the CSS value for each element in the DOMQuery object.
* It does this by setting (or getting) the style attribute (without a namespace).
*
* For example, consider this code:
* @code
* <?php
* qp(HTML_STUB, 'body')->css('background-color','red')->html();
* ?>
* @endcode
* This will return the following HTML:
* @code
* <body style="background-color: red"/>
* @endcode
*
* If no parameters are passed into this function, then the current style
* element will be returned unparsed. Example:
* @code
* <?php
* qp(HTML_STUB, 'body')->css('background-color','red')->css();
* ?>
* @endcode
* This will return the following:
* @code
* background-color: red
* @endcode
*
* As of QueryPath 2.1, existing style attributes will be merged with new attributes.
* (In previous versions of QueryPath, a call to css() overwrite the existing style
* values).
*
* @param mixed $name
* If this is a string, it will be used as a CSS name. If it is an array,
* this will assume it is an array of name/value pairs of CSS rules. It will
* apply all rules to all elements in the set.
* @param string $value
* The value to set. This is only set if $name is a string.
* @retval object DOMQuery
*/
public function css($name = NULL, $value = '') {
if (empty($name)) {
return $this->attr('style');
}
// Get any existing CSS.
$css = array();
foreach ($this->matches as $match) {
$style = $match->getAttribute('style');
if (!empty($style)) {
// XXX: Is this sufficient?
$style_array = explode(';', $style);
foreach ($style_array as $item) {
$item = trim($item);
// Skip empty attributes.
if (strlen($item) == 0) continue;
list($css_att, $css_val) = explode(':',$item, 2);
$css[$css_att] = trim($css_val);
}
}
}
if (is_array($name)) {
// Use array_merge instead of + to preserve order.
$css = array_merge($css, $name);
}
else {
$css[$name] = $value;
}
// Collapse CSS into a string.
$format = '%s: %s;';
$css_string = '';
foreach ($css as $n => $v) {
$css_string .= sprintf($format, $n, trim($v));
}
$this->attr('style', $css_string);
return $this;
}
/**
* Insert or retrieve a Data URL.
*
* When called with just $attr, it will fetch the result, attempt to decode it, and
* return an array with the MIME type and the application data.
*
* When called with both $attr and $data, it will inject the data into all selected elements
* So @code$qp->dataURL('src', file_get_contents('my.png'), 'image/png')@endcode will inject
* the given PNG image into the selected elements.
*
* The current implementation only knows how to encode and decode Base 64 data.
*
* Note that this is known *not* to work on IE 6, but should render fine in other browsers.
*
* @param string $attr
* The name of the attribute.
* @param mixed $data
* The contents to inject as the data. The value can be any one of the following:
* - A URL: If this is given, then the subsystem will read the content from that URL. THIS
* MUST BE A FULL URL, not a relative path.
* - A string of data: If this is given, then the subsystem will encode the string.
* - A stream or file handle: If this is given, the stream's contents will be encoded
* and inserted as data.
* (Note that we make the assumption here that you would never want to set data to be
* a URL. If this is an incorrect assumption, file a bug.)
* @param string $mime
* The MIME type of the document.
* @param resource $context
* A valid context. Use this only if you need to pass a stream context. This is only necessary
* if $data is a URL. (See {@link stream_context_create()}).
* @retval mixed
* If this is called as a setter, this will return a DOMQuery object. Otherwise, it
* will attempt to fetch data out of the attribute and return that.
* @see http://en.wikipedia.org/wiki/Data:_URL
* @see attr()
* @since 2.1
*/
public function dataURL($attr, $data = NULL, $mime = 'application/octet-stream', $context = NULL) {
if (is_null($data)) {
// Attempt to fetch the data
$data = $this->attr($attr);
if (empty($data) || is_array($data) || strpos($data, 'data:') !== 0) {
return;
}
// So 1 and 2 should be MIME types, and 3 should be the base64-encoded data.
$regex = '/^data:([a-zA-Z0-9]+)\/([a-zA-Z0-9]+);base64,(.*)$/';
$matches = array();
preg_match($regex, $data, $matches);
if (!empty($matches)) {
$result = array(
'mime' => $matches[1] . '/' . $matches[2],
'data' => base64_decode($matches[3]),
);
return $result;
}
}
else {
$attVal = \QueryPath::encodeDataURL($data, $mime, $context);
return $this->attr($attr, $attVal);
}
}
/**
* Remove the named attribute from all elements in the current DOMQuery.
*
* This will remove any attribute with the given name. It will do this on each
* item currently wrapped by DOMQuery.
*
* As is the case in jQuery, this operation is not considered destructive.
*
* @param string $name
* Name of the parameter to remove.
* @retval object DOMQuery
* The DOMQuery object with the same elements.
* @see attr()
*/
public function removeAttr($name) {
foreach ($this->matches as $m) {
//if ($m->hasAttribute($name))
$m->removeAttribute($name);
}
return $this;
}
/**
* Reduce the matched set to just one.
*
* This will take a matched set and reduce it to just one item -- the item
* at the index specified. This is a destructive operation, and can be undone
* with {@link end()}.
*
* @param $index
* The index of the element to keep. The rest will be
* discarded.
* @retval object DOMQuery
* @see get()
* @see is()
* @see end()
*/
public function eq($index) {
return $this->inst($this->getNthMatch($index), NULL, $this->options);
// XXX: Might there be a more efficient way of doing this?
//$this->setMatches($this->getNthMatch($index));
//return $this;
}
/**
* Given a selector, this checks to see if the current set has one or more matches.
*
* Unlike jQuery's version, this supports full selectors (not just simple ones).
*
* @param string $selector
* The selector to search for. As of QueryPath 2.1.1, this also supports passing a
* DOMNode object.
* @return boolean
* TRUE if one or more elements match. FALSE if no match is found.
* @see get()
* @see eq()
*/
public function is($selector) {
if (is_object($selector)) {
if ($selector instanceof \DOMNode) {
return count($this->matches) == 1 && $selector->isSameNode($this->get(0));
}
elseif ($selector instanceof \Traversable) {
if (count($selector) != count($this->matches)) {
return FALSE;
}
// Without $seen, there is an edge case here if $selector contains the same object
// more than once, but the counts are equal. For example, [a, a, a, a] will
// pass an is() on [a, b, c, d]. We use the $seen SPLOS to prevent this.
$seen = new \SplObjectStorage();
foreach ($selector as $item) {
if (!$this->matches->contains($item) || $seen->contains($item)) {
return FALSE;
}
$seen->attach($item);
}
return TRUE;
}
throw new \QueryPath\Exception('Cannot compare an object to a DOMQuery.');
return FALSE;
}
// Testing based on Issue #70.
//fprintf(STDOUT, __FUNCTION__ .' found %d', $this->find($selector)->count());
return $this->branch($selector)->count() > 0;
// Old version:
//foreach ($this->matches as $m) {
//$q = new \QueryPath\CSS\QueryPathEventHandler($m);
//if ($q->find($selector)->getMatches()->count()) {
//return TRUE;
//}
//}
//return FALSE;
}
/**
* Filter a list down to only elements that match the selector.
* Use this, for example, to find all elements with a class, or with
* certain children.
*
* @param string $selector
* The selector to use as a filter.
* @retval object DOMQuery
* The DOMQuery with non-matching items filtered out.
* @see filterLambda()
* @see filterCallback()
* @see map()
* @see find()
* @see is()
*/
public function filter($selector) {
$found = new \SplObjectStorage();
$tmp = new \SplObjectStorage();
foreach ($this->matches as $m) {
$tmp->attach($m);
// Seems like this should be right... but it fails unit
// tests. Need to compare to jQuery.
// $query = new \QueryPath\CSS\DOMTraverser($tmp, TRUE, $m);
$query = new \QueryPath\CSS\DOMTraverser($tmp);
$query->find($selector);
if (count($query->matches())) {
$found->attach($m);
}
$tmp->detach($m);
}
return $this->inst($found, NULL, $this->options);
}
/**
* Sort the contents of the QueryPath object.
*
* By default, this does not change the order of the elements in the
* DOM. Instead, it just sorts the internal list. However, if TRUE
* is passed in as the second parameter then QueryPath will re-order
* the DOM, too.
*
* @attention
* DOM re-ordering is done by finding the location of the original first
* item in the list, and then placing the sorted list at that location.
*
* The argument $compartor is a callback, such as a function name or a
* closure. The callback receives two DOMNode objects, which you can use
* as DOMNodes, or wrap in QueryPath objects.
*
* A simple callback:
* @code
* <?php
* $comp = function (\DOMNode $a, \DOMNode $b) {
* if ($a->textContent == $b->textContent) {
* return 0;
* }
* return $a->textContent > $b->textContent ? 1 : -1;
* };
* $qp = QueryPath::with($xml, $selector)->sort($comp);
* ?>
* @endcode
*
* The above sorts the matches into lexical order using the text of each node.
* If you would prefer to work with QueryPath objects instead of DOMNode
* objects, you may prefer something like this:
*
* @code
* <?php
* $comp = function (\DOMNode $a, \DOMNode $b) {
* $qpa = qp($a);
* $qpb = qp($b);
*
* if ($qpa->text() == $qpb->text()) {
* return 0;
* }
* return $qpa->text()> $qpb->text()? 1 : -1;
* };
*
* $qp = QueryPath::with($xml, $selector)->sort($comp);
* ?>
* @endcode
*
* @param callback $comparator
* A callback. This will be called during sorting to compare two DOMNode
* objects.
* @param boolean $modifyDOM
* If this is TRUE, the sorted results will be inserted back into
* the DOM at the position of the original first element.
* @retval object DOMQuery
* This object.
*/
public function sort($comparator, $modifyDOM = FALSE) {
// Sort as an array.
$list = iterator_to_array($this->matches);
if (empty($list)) {
return $this;
}
$oldFirst = $list[0];
usort($list, $comparator);
// Copy back into SplObjectStorage.
$found = new \SplObjectStorage();
foreach ($list as $node) {
$found->attach($node);
}
//$this->setMatches($found);
// Do DOM modifications only if necessary.
if ($modifyDOM) {
$placeholder = $oldFirst->ownerDocument->createElement('_PLACEHOLDER_');
$placeholder = $oldFirst->parentNode->insertBefore($placeholder, $oldFirst);
$len = count($list);
for ($i = 0; $i < $len; ++$i) {
$node = $list[$i];
$node = $node->parentNode->removeChild($node);
$placeholder->parentNode->insertBefore($node, $placeholder);
}
$placeholder->parentNode->removeChild($placeholder);
}
return $this->inst($found, NULL, $this->options);
}
/**
* Filter based on a lambda function.
*
* The function string will be executed as if it were the body of a
* function. It is passed two arguments:
* - $index: The index of the item.
* - $item: The current Element.
* If the function returns boolean FALSE, the item will be removed from
* the list of elements. Otherwise it will be kept.
*
* Example:
* @code
* qp('li')->filterLambda('qp($item)->attr("id") == "test"');
* @endcode
*
* The above would filter down the list to only an item whose ID is
* 'text'.
*
* @param string $fn
* Inline lambda function in a string.
* @retval object DOMQuery
* @see filter()
* @see map()
* @see mapLambda()
* @see filterCallback()
*/
public function filterLambda($fn) {
$function = create_function('$index, $item', $fn);
$found = new \SplObjectStorage();
$i = 0;
foreach ($this->matches as $item)
if ($function($i++, $item) !== FALSE) $found->attach($item);
return $this->inst($found, NULL, $this->options);
}
/**
* Use regular expressions to filter based on the text content of matched elements.
*
* Only items that match the given regular expression will be kept. All others will
* be removed.
*
* The regular expression is run against the <i>text content</i> (the PCDATA) of the
* elements. This is a way of filtering elements based on their content.
*
* Example:
* @code
* <?xml version="1.0"?>
* <div>Hello <i>World</i></div>
* @endcode
*
* @code
* <?php
* // This will be 1.
* qp($xml, 'div')->filterPreg('/World/')->size();
* ?>
* @endcode
*
* The return value above will be 1 because the text content of @codeqp($xml, 'div')@endcode is
* @codeHello World@endcode.
*
* Compare this to the behavior of the <em>:contains()</em> CSS3 pseudo-class.
*
* @param string $regex
* A regular expression.
* @retval object DOMQuery
* @see filter()
* @see filterCallback()
* @see preg_match()
*/
public function filterPreg($regex) {
$found = new \SplObjectStorage();
foreach ($this->matches as $item) {
if (preg_match($regex, $item->textContent) > 0) {
$found->attach($item);
}
}
return $this->inst($found, NULL, $this->options);
}
/**
* Filter based on a callback function.
*
* A callback may be any of the following:
* - a function: 'my_func'.
* - an object/method combo: $obj, 'myMethod'
* - a class/method combo: 'MyClass', 'myMethod'
* Note that classes are passed in strings. Objects are not.
*
* Each callback is passed to arguments:
* - $index: The index position of the object in the array.
* - $item: The item to be operated upon.
*
* If the callback function returns FALSE, the item will be removed from the
* set of matches. Otherwise the item will be considered a match and left alone.
*
* @param callback $callback.
* A callback either as a string (function) or an array (object, method OR
* classname, method).
* @retval object DOMQuery
* Query path object augmented according to the function.
* @see filter()
* @see filterLambda()
* @see map()
* @see is()
* @see find()
*/
public function filterCallback($callback) {
$found = new \SplObjectStorage();
$i = 0;
if (is_callable($callback)) {
foreach($this->matches as $item)
if (call_user_func($callback, $i++, $item) !== FALSE) $found->attach($item);
}
else {
throw new \QueryPath\Exception('The specified callback is not callable.');
}
return $this->inst($found, NULL, $this->options);
}
/**
* Filter a list to contain only items that do NOT match.
*
* @param string $selector
* A selector to use as a negation filter. If the filter is matched, the
* element will be removed from the list.
* @retval object DOMQuery
* The DOMQuery object with matching items filtered out.
* @see find()
*/
public function not($selector) {
$found = new \SplObjectStorage();
if ($selector instanceof \DOMElement) {
foreach ($this->matches as $m) if ($m !== $selector) $found->attach($m);
}
elseif (is_array($selector)) {
foreach ($this->matches as $m) {
if (!in_array($m, $selector, TRUE)) $found->attach($m);
}
}
elseif ($selector instanceof \SplObjectStorage) {
foreach ($this->matches as $m) if ($selector->contains($m)) $found->attach($m);
}
else {
foreach ($this->matches as $m) if (!QueryPath::with($m, NULL, $this->options)->is($selector)) $found->attach($m);
}
return $this->inst($found, NULL, $this->options);
}
/**
* Get an item's index.
*
* Given a DOMElement, get the index from the matches. This is the
* converse of {@link get()}.
*
* @param DOMElement $subject
* The item to match.
*
* @return mixed
* The index as an integer (if found), or boolean FALSE. Since 0 is a
* valid index, you should use strong equality (===) to test..
* @see get()
* @see is()
*/
public function index($subject) {
$i = 0;
foreach ($this->matches as $m) {
if ($m === $subject) {
return $i;
}
++$i;
}
return FALSE;
}
/**
* Run a function on each item in a set.
*
* The mapping callback can return anything. Whatever it returns will be
* stored as a match in the set, though. This means that afer a map call,
* there is no guarantee that the elements in the set will behave correctly
* with other DOMQuery functions.
*
* Callback rules:
* - If the callback returns NULL, the item will be removed from the array.
* - If the callback returns an array, the entire array will be stored in
* the results.
* - If the callback returns anything else, it will be appended to the array
* of matches.
*
* @param callback $callback
* The function or callback to use. The callback will be passed two params:
* - $index: The index position in the list of items wrapped by this object.
* - $item: The current item.
*
* @retval object DOMQuery
* The DOMQuery object wrapping a list of whatever values were returned
* by each run of the callback.
*
* @see DOMQuery::get()
* @see filter()
* @see find()
*/
public function map($callback) {
$found = new \SplObjectStorage();
if (is_callable($callback)) {
$i = 0;
foreach ($this->matches as $item) {
$c = call_user_func($callback, $i, $item);
if (isset($c)) {
if (is_array($c) || $c instanceof \Iterable) {
foreach ($c as $retval) {
if (!is_object($retval)) {
$tmp = new \stdClass();
$tmp->textContent = $retval;
$retval = $tmp;
}
$found->attach($retval);
}
}
else {
if (!is_object($c)) {
$tmp = new \stdClass();
$tmp->textContent = $c;
$c = $tmp;
}
$found->attach($c);
}
}
++$i;
}
}
else {
throw new \QueryPath\Exception('Callback is not callable.');
}
return $this->inst($found, NULL, $this->options);
}
/**
* Narrow the items in this object down to only a slice of the starting items.
*
* @param integer $start
* Where in the list of matches to begin the slice.
* @param integer $length
* The number of items to include in the slice. If nothing is specified, the
* all remaining matches (from $start onward) will be included in the sliced
* list.
* @retval object DOMQuery
* @see array_slice()
*/
public function slice($start, $length = 0) {
$end = $length;
$found = new \SplObjectStorage();
if ($start >= $this->size()) {
return $this->inst($found, NULL, $this->options);
}
$i = $j = 0;
foreach ($this->matches as $m) {
if ($i >= $start) {
if ($end > 0 && $j >= $end) {
break;
}
$found->attach($m);
++$j;
}
++$i;
}
return $this->inst($found, NULL, $this->options);
}
/**
* Run a callback on each item in the list of items.
*
* Rules of the callback:
* - A callback is passed two variables: $index and $item. (There is no
* special treatment of $this, as there is in jQuery.)
* - You will want to pass $item by reference if it is not an
* object (DOMNodes are all objects).
* - A callback that returns FALSE will stop execution of the each() loop. This
* works like break in a standard loop.
* - A TRUE return value from the callback is analogous to a continue statement.
* - All other return values are ignored.
*
* @param callback $callback
* The callback to run.
* @retval object DOMQuery
* The DOMQuery.
* @see eachLambda()
* @see filter()
* @see map()
*/
public function each($callback) {
if (is_callable($callback)) {
$i = 0;
foreach ($this->matches as $item) {
if (call_user_func($callback, $i, $item) === FALSE) return $this;
++$i;
}
}
else {
throw new \QueryPath\Exception('Callback is not callable.');
}
return $this;
}
/**
* An each() iterator that takes a lambda function.
*
* @deprecated
* Since PHP 5.3 supports anonymous functions -- REAL Lambdas -- this
* method is not necessary and should be avoided.
* @param string $lambda
* The lambda function. This will be passed ($index, &$item).
* @retval object DOMQuery
* The DOMQuery object.
* @see each()
* @see filterLambda()
* @see filterCallback()
* @see map()
*/
public function eachLambda($lambda) {
$index = 0;
foreach ($this->matches as $item) {
$fn = create_function('$index, &$item', $lambda);
if ($fn($index, $item) === FALSE) return $this;
++$index;
}
return $this;
}
/**
* Insert the given markup as the last child.
*
* The markup will be inserted into each match in the set.
*
* The same element cannot be inserted multiple times into a document. DOM
* documents do not allow a single object to be inserted multiple times
* into the DOM. To insert the same XML repeatedly, we must first clone
* the object. This has one practical implication: Once you have inserted
* an element into the object, you cannot further manipulate the original
* element and expect the changes to be replciated in the appended object.
* (They are not the same -- there is no shared reference.) Instead, you
* will need to retrieve the appended object and operate on that.
*
* @param mixed $data
* This can be either a string (the usual case), or a DOM Element.
* @retval object DOMQuery
* The DOMQuery object.
* @see appendTo()
* @see prepend()
* @throws QueryPath::Exception
* Thrown if $data is an unsupported object type.
*/
public function append($data) {
$data = $this->prepareInsert($data);
if (isset($data)) {
if (empty($this->document->documentElement) && $this->matches->count() == 0) {
// Then we assume we are writing to the doc root
$this->document->appendChild($data);
$found = new \SplObjectStorage();
$found->attach($this->document->documentElement);
$this->setMatches($found);
}
else {
// You can only append in item once. So in cases where we
// need to append multiple times, we have to clone the node.
foreach ($this->matches as $m) {
// DOMDocumentFragments are even more troublesome, as they don't
// always clone correctly. So we have to clone their children.
if ($data instanceof \DOMDocumentFragment) {
foreach ($data->childNodes as $n)
$m->appendChild($n->cloneNode(TRUE));
}
else {
// Otherwise a standard clone will do.
$m->appendChild($data->cloneNode(TRUE));
}
}
}
}
return $this;
}
/**
* Append the current elements to the destination passed into the function.
*
* This cycles through all of the current matches and appends them to
* the context given in $destination. If a selector is provided then the
* $destination is queried (using that selector) prior to the data being
* appended. The data is then appended to the found items.
*
* @param DOMQuery $dest
* A DOMQuery object that will be appended to.
* @retval object DOMQuery
* The original DOMQuery, unaltered. Only the destination DOMQuery will
* be modified.
* @see append()
* @see prependTo()
* @throws QueryPath::Exception
* Thrown if $data is an unsupported object type.
*/
public function appendTo(DOMQuery $dest) {
foreach ($this->matches as $m) $dest->append($m);
return $this;
}
/**
* Insert the given markup as the first child.
*
* The markup will be inserted into each match in the set.
*
* @param mixed $data
* This can be either a string (the usual case), or a DOM Element.
* @retval object DOMQuery
* @see append()
* @see before()
* @see after()
* @see prependTo()
* @throws QueryPath::Exception
* Thrown if $data is an unsupported object type.
*/
public function prepend($data) {
$data = $this->prepareInsert($data);
if (isset($data)) {
foreach ($this->matches as $m) {
$ins = $data->cloneNode(TRUE);
if ($m->hasChildNodes())
$m->insertBefore($ins, $m->childNodes->item(0));
else
$m->appendChild($ins);
}
}
return $this;
}
/**
* Take all nodes in the current object and prepend them to the children nodes of
* each matched node in the passed-in DOMQuery object.
*
* This will iterate through each item in the current DOMQuery object and
* add each item to the beginning of the children of each element in the
* passed-in DOMQuery object.
*
* @see insertBefore()
* @see insertAfter()
* @see prepend()
* @see appendTo()
* @param DOMQuery $dest
* The destination DOMQuery object.
* @retval object DOMQuery
* The original DOMQuery, unmodified. NOT the destination DOMQuery.
* @throws QueryPath::Exception
* Thrown if $data is an unsupported object type.
*/
public function prependTo(DOMQuery $dest) {
foreach ($this->matches as $m) $dest->prepend($m);
return $this;
}
/**
* Insert the given data before each element in the current set of matches.
*
* This will take the give data (XML or HTML) and put it before each of the items that
* the DOMQuery object currently contains. Contrast this with after().
*
* @param mixed $data
* The data to be inserted. This can be XML in a string, a DomFragment, a DOMElement,
* or the other usual suspects. (See {@link qp()}).
* @retval object DOMQuery
* Returns the DOMQuery with the new modifications. The list of elements currently
* selected will remain the same.
* @see insertBefore()
* @see after()
* @see append()
* @see prepend()
* @throws QueryPath::Exception
* Thrown if $data is an unsupported object type.
*/
public function before($data) {
$data = $this->prepareInsert($data);
foreach ($this->matches as $m) {
$ins = $data->cloneNode(TRUE);
$m->parentNode->insertBefore($ins, $m);
}
return $this;
}
/**
* Insert the current elements into the destination document.
* The items are inserted before each element in the given DOMQuery document.
* That is, they will be siblings with the current elements.
*
* @param DOMQuery $dest
* Destination DOMQuery document.
* @retval object DOMQuery
* The current DOMQuery object, unaltered. Only the destination DOMQuery
* object is altered.
* @see before()
* @see insertAfter()
* @see appendTo()
* @throws QueryPath::Exception
* Thrown if $data is an unsupported object type.
*/
public function insertBefore(DOMQuery $dest) {
foreach ($this->matches as $m) $dest->before($m);
return $this;
}
/**
* Insert the contents of the current DOMQuery after the nodes in the
* destination DOMQuery object.
*
* @param DOMQuery $dest
* Destination object where the current elements will be deposited.
* @retval object DOMQuery
* The present DOMQuery, unaltered. Only the destination object is altered.
* @see after()
* @see insertBefore()
* @see append()
* @throws QueryPath::Exception
* Thrown if $data is an unsupported object type.
*/
public function insertAfter(DOMQuery $dest) {
foreach ($this->matches as $m) $dest->after($m);
return $this;
}
/**
* Insert the given data after each element in the current DOMQuery object.
*
* This inserts the element as a peer to the currently matched elements.
* Contrast this with {@link append()}, which inserts the data as children
* of matched elements.
*
* @param mixed $data
* The data to be appended.
* @retval object DOMQuery
* The DOMQuery object (with the items inserted).
* @see before()
* @see append()
* @throws QueryPath::Exception
* Thrown if $data is an unsupported object type.
*/
public function after($data) {
$data = $this->prepareInsert($data);
foreach ($this->matches as $m) {
$ins = $data->cloneNode(TRUE);
if (isset($m->nextSibling))
$m->parentNode->insertBefore($ins, $m->nextSibling);
else
$m->parentNode->appendChild($ins);
}
return $this;
}
/**
* Replace the existing element(s) in the list with a new one.
*
* @param mixed $new
* A DOMElement or XML in a string. This will replace all elements
* currently wrapped in the DOMQuery object.
* @retval object DOMQuery
* The DOMQuery object wrapping <b>the items that were removed</b>.
* This remains consistent with the jQuery API.
* @see append()
* @see prepend()
* @see before()
* @see after()
* @see remove()
* @see replaceAll()
*/
public function replaceWith($new) {
$data = $this->prepareInsert($new);
$found = new \SplObjectStorage();
foreach ($this->matches as $m) {
$parent = $m->parentNode;
$parent->insertBefore($data->cloneNode(TRUE), $m);
$found->attach($parent->removeChild($m));
}
return $this->inst($found, NULL, $this->options);
}
/**
* Remove the parent element from the selected node or nodes.
*
* This takes the given list of nodes and "unwraps" them, moving them out of their parent
* node, and then deleting the parent node.
*
* For example, consider this:
*
* @code
* <root><wrapper><content/></wrapper></root>
* @endcode
*
* Now we can run this code:
* @code
* qp($xml, 'content')->unwrap();
* @endcode
*
* This will result in:
*
* @code
* <root><content/></root>
* @endcode
* This is the opposite of wrap().
*
* <b>The root element cannot be unwrapped.</b> It has no parents.
* If you attempt to use unwrap on a root element, this will throw a
* QueryPath::Exception. (You can, however, "Unwrap" a child that is
* a direct descendant of the root element. This will remove the root
* element, and replace the child as the root element. Be careful, though.
* You cannot set more than one child as a root element.)
*
* @retval object DOMQuery
* The DOMQuery object, with the same element(s) selected.
* @throws QueryPath::Exception
* An exception is thrown if one attempts to unwrap a root element.
* @see wrap()
* @since 2.1
* @author mbutcher
*/
public function unwrap() {
// We do this in two loops in order to
// capture the case where two matches are
// under the same parent. Othwerwise we might
// remove a match before we can move it.
$parents = new \SplObjectStorage();
foreach ($this->matches as $m) {
// Cannot unwrap the root element.
if ($m->isSameNode($m->ownerDocument->documentElement)) {
throw new \QueryPath\Exception('Cannot unwrap the root element.');
}
// Move children to peer of parent.
$parent = $m->parentNode;
$old = $parent->removeChild($m);
$parent->parentNode->insertBefore($old, $parent);
$parents->attach($parent);
}
// Now that all the children are moved, we
// remove all of the parents.
foreach ($parents as $ele) {
$ele->parentNode->removeChild($ele);
}
return $this;
}
/**
* Wrap each element inside of the given markup.
*
* Markup is usually a string, but it can also be a DOMNode, a document
* fragment, a SimpleXMLElement, or another DOMNode object (in which case
* the first item in the list will be used.)
*
* @param mixed $markup
* Markup that will wrap each element in the current list.
* @retval object DOMQuery
* The DOMQuery object with the wrapping changes made.
* @see wrapAll()
* @see wrapInner()
*/
public function wrap($markup) {
$data = $this->prepareInsert($markup);
// If the markup passed in is empty, we don't do any wrapping.
if (empty($data)) {
return $this;
}
foreach ($this->matches as $m) {
if ($data instanceof \DOMDocumentFragment) {
$copy = $data->firstChild->cloneNode(true);
} else {
$copy = $data->cloneNode(true);
}
// XXX: Should be able to avoid doing this over and over.
if ($copy->hasChildNodes()) {
$deepest = $this->deepestNode($copy);
// FIXME: Does this need a different data structure?
$bottom = $deepest[0];
}
else
$bottom = $copy;
$parent = $m->parentNode;
$parent->insertBefore($copy, $m);
$m = $parent->removeChild($m);
$bottom->appendChild($m);
//$parent->appendChild($copy);
}
return $this;
}
/**
* Wrap all elements inside of the given markup.
*
* So all elements will be grouped together under this single marked up
* item. This works by first determining the parent element of the first item
* in the list. It then moves all of the matching elements under the wrapper
* and inserts the wrapper where that first element was found. (This is in
* accordance with the way jQuery works.)
*
* Markup is usually XML in a string, but it can also be a DOMNode, a document
* fragment, a SimpleXMLElement, or another DOMNode object (in which case
* the first item in the list will be used.)
*
* @param string $markup
* Markup that will wrap all elements in the current list.
* @retval object DOMQuery
* The DOMQuery object with the wrapping changes made.
* @see wrap()
* @see wrapInner()
*/
public function wrapAll($markup) {
if ($this->matches->count() == 0) return;
$data = $this->prepareInsert($markup);
if (empty($data)) {
return $this;
}
if ($data instanceof \DOMDocumentFragment) {
$data = $data->firstChild->cloneNode(true);
} else {
$data = $data->cloneNode(true);
}
if ($data->hasChildNodes()) {
$deepest = $this->deepestNode($data);
// FIXME: Does this need fixing?
$bottom = $deepest[0];
}
else
$bottom = $data;
$first = $this->getFirstMatch();
$parent = $first->parentNode;
$parent->insertBefore($data, $first);
foreach ($this->matches as $m) {
$bottom->appendChild($m->parentNode->removeChild($m));
}
return $this;
}
/**
* Wrap the child elements of each item in the list with the given markup.
*
* Markup is usually a string, but it can also be a DOMNode, a document
* fragment, a SimpleXMLElement, or another DOMNode object (in which case
* the first item in the list will be used.)
*
* @param string $markup
* Markup that will wrap children of each element in the current list.
* @retval object DOMQuery
* The DOMQuery object with the wrapping changes made.
* @see wrap()
* @see wrapAll()
*/
public function wrapInner($markup) {
$data = $this->prepareInsert($markup);
// No data? Short circuit.
if (empty($data)) return $this;
foreach ($this->matches as $m) {
if ($data instanceof \DOMDocumentFragment) {
$wrapper = $data->firstChild->cloneNode(true);
} else {
$wrapper = $data->cloneNode(true);
}
if ($wrapper->hasChildNodes()) {
$deepest = $this->deepestNode($wrapper);
// FIXME: ???
$bottom = $deepest[0];
}
else
$bottom = $wrapper;
if ($m->hasChildNodes()) {
while($m->firstChild) {
$kid = $m->removeChild($m->firstChild);
$bottom->appendChild($kid);
}
}
$m->appendChild($wrapper);
}
return $this;
}
/**
* Reduce the set of matches to the deepest child node in the tree.
*
* This loops through the matches and looks for the deepest child node of all of
* the matches. "Deepest", here, is relative to the nodes in the list. It is
* calculated as the distance from the starting node to the most distant child
* node. In other words, it is not necessarily the farthest node from the root
* element, but the farthest note from the matched element.
*
* In the case where there are multiple nodes at the same depth, all of the
* nodes at that depth will be included.
*
* @retval object DOMQuery
* The DOMQuery wrapping the single deepest node.
*/
public function deepest() {
$deepest = 0;
$winner = new \SplObjectStorage();
foreach ($this->matches as $m) {
$local_deepest = 0;
$local_ele = $this->deepestNode($m, 0, NULL, $local_deepest);
// Replace with the new deepest.
if ($local_deepest > $deepest) {
$winner = new \SplObjectStorage();
foreach ($local_ele as $lele) $winner->attach($lele);
$deepest = $local_deepest;
}
// Augument with other equally deep elements.
elseif ($local_deepest == $deepest) {
foreach ($local_ele as $lele)
$winner->attach($lele);
}
}
return $this->inst($winner, NULL, $this->options);
}
/**
* A depth-checking function. Typically, it only needs to be
* invoked with the first parameter. The rest are used for recursion.
* @see deepest();
* @param DOMNode $ele
* The element.
* @param int $depth
* The depth guage
* @param mixed $current
* The current set.
* @param DOMNode $deepest
* A reference to the current deepest node.
* @return array
* Returns an array of DOM nodes.
*/
protected function deepestNode(\DOMNode $ele, $depth = 0, $current = NULL, &$deepest = NULL) {
// FIXME: Should this use SplObjectStorage?
if (!isset($current)) $current = array($ele);
if (!isset($deepest)) $deepest = $depth;
if ($ele->hasChildNodes()) {
foreach ($ele->childNodes as $child) {
if ($child->nodeType === XML_ELEMENT_NODE) {
$current = $this->deepestNode($child, $depth + 1, $current, $deepest);
}
}
}
elseif ($depth > $deepest) {
$current = array($ele);
$deepest = $depth;
}
elseif ($depth === $deepest) {
$current[] = $ele;
}
return $current;
}
/**
* Prepare an item for insertion into a DOM.
*
* This handles a variety of boilerplate tasks that need doing before an
* indeterminate object can be inserted into a DOM tree.
* - If item is a string, this is converted into a document fragment and returned.
* - If item is a DOMQuery, then all items are retrieved and converted into
* a document fragment and returned.
* - If the item is a DOMNode, it is imported into the current DOM if necessary.
* - If the item is a SimpleXMLElement, it is converted into a DOM node and then
* imported.
*
* @param mixed $item
* Item to prepare for insert.
* @return mixed
* Returns the prepared item.
* @throws QueryPath::Exception
* Thrown if the object passed in is not of a supprted object type.
*/
protected function prepareInsert($item) {
if(empty($item)) {
return;
}
elseif (is_string($item)) {
// If configured to do so, replace all entities.
if ($this->options['replace_entities']) {
$item = \QueryPath\Entities::replaceAllEntities($item);
}
$frag = $this->document->createDocumentFragment();
try {
set_error_handler(array('\QueryPath\ParseException', 'initializeFromError'), $this->errTypes);
$frag->appendXML($item);
}
// Simulate a finally block.
catch (Exception $e) {
restore_error_handler();
throw $e;
}
restore_error_handler();
return $frag;
}
elseif ($item instanceof DOMQuery) {
if ($item->size() == 0)
return;
$frag = $this->document->createDocumentFragment();
foreach ($item->matches as $m) {
$frag->appendXML($item->document->saveXML($m));
}
return $frag;
}
elseif ($item instanceof \DOMNode) {
if ($item->ownerDocument !== $this->document) {
// Deep clone this and attach it to this document
$item = $this->document->importNode($item, TRUE);
}
return $item;
}
elseif ($item instanceof \SimpleXMLElement) {
$element = dom_import_simplexml($item);
return $this->document->importNode($element, TRUE);
}
// What should we do here?
//var_dump($item);
throw new \QueryPath\Exception("Cannot prepare item of unsupported type: " . gettype($item));
}
/**
* The tag name of the first element in the list.
*
* This returns the tag name of the first element in the list of matches. If
* the list is empty, an empty string will be used.
*
* @see replaceAll()
* @see replaceWith()
* @return string
* The tag name of the first element in the list.
*/
public function tag() {
return ($this->size() > 0) ? $this->getFirstMatch()->tagName : '';
}
/**
* Remove any items from the list if they match the selector.
*
* In other words, each item that matches the selector will be remove
* from the DOM document. The returned DOMQuery wraps the list of
* removed elements.
*
* If no selector is specified, this will remove all current matches from
* the document.
*
* @param string $selector
* A CSS Selector.
* @retval object DOMQuery
* The Query path wrapping a list of removed items.
* @see replaceAll()
* @see replaceWith()
* @see removeChildren()
*/
public function remove($selector = NULL) {
if(!empty($selector)) {
// Do a non-destructive find.
$query = new QueryPathEventHandler($this->matches);
$query->find($selector);
$matches = $query->getMatches();
}
else {
$matches = $this->matches;
}
$found = new \SplObjectStorage();
foreach ($matches as $item) {
// The item returned is (according to docs) different from
// the one passed in, so we have to re-store it.
$found->attach($item->parentNode->removeChild($item));
}
// Return a clone DOMQuery with just the removed items. If
// no items are found, this will return an empty DOMQuery.
return count($found) == 0 ? new static() : new static($found);
}
/**
* This replaces everything that matches the selector with the first value
* in the current list.
*
* This is the reverse of replaceWith.
*
* Unlike jQuery, DOMQuery cannot assume a default document. Consequently,
* you must specify the intended destination document. If it is omitted, the
* present document is assumed to be tthe document. However, that can result
* in undefined behavior if the selector and the replacement are not sufficiently
* distinct.
*
* @param string $selector
* The selector.
* @param DOMDocument $document
* The destination document.
* @retval object DOMQuery
* The DOMQuery wrapping the modified document.
* @deprecated Due to the fact that this is not a particularly friendly method,
* and that it can be easily replicated using {@see replaceWith()}, it is to be
* considered deprecated.
* @see remove()
* @see replaceWith()
*/
public function replaceAll($selector, \DOMDocument $document) {
$replacement = $this->size() > 0 ? $this->getFirstMatch() : $this->document->createTextNode('');
$c = new QueryPathEventHandler($document);
$c->find($selector);
$temp = $c->getMatches();
foreach ($temp as $item) {
$node = $replacement->cloneNode();
$node = $document->importNode($node);
$item->parentNode->replaceChild($node, $item);
}
return QueryPath::with($document, NULL, $this->options);
}
/**
* Add more elements to the current set of matches.
*
* This begins the new query at the top of the DOM again. The results found
* when running this selector are then merged into the existing results. In
* this way, you can add additional elements to the existing set.
*
* @param string $selector
* A valid selector.
* @retval object DOMQuery
* The DOMQuery object with the newly added elements.
* @see append()
* @see after()
* @see andSelf()
* @see end()
*/
public function add($selector) {
// This is destructive, so we need to set $last:
$this->last = $this->matches;
foreach (QueryPath::with($this->document, $selector, $this->options)->get() as $item) {
$this->matches->attach($item);
}
return $this;
}
/**
* Revert to the previous set of matches.
*
* <b>DEPRECATED</b> Do not use.
*
* This will revert back to the last set of matches (before the last
* "destructive" set of operations). This undoes any change made to the set of
* matched objects. Functions like find() and filter() change the
* list of matched objects. The end() function will revert back to the last set of
* matched items.
*
* Note that functions that modify the document, but do not change the list of
* matched objects, are not "destructive". Thus, calling append('something')->end()
* will not undo the append() call.
*
* Only one level of changes is stored. Reverting beyond that will result in
* an empty set of matches. Example:
*
* @code
* // The line below returns the same thing as qp(document, 'p');
* qp(document, 'p')->find('div')->end();
* // This returns an empty array:
* qp(document, 'p')->end();
* // This returns an empty array:
* qp(document, 'p')->find('div')->find('span')->end()->end();
* @endcode
*
* The last one returns an empty array because only one level of changes is stored.
*
* @retval object DOMQuery
* A DOMNode object reflecting the list of matches prior to the last destructive
* operation.
* @see andSelf()
* @see add()
* @deprecated This function will be removed.
*/
public function end() {
// Note that this does not use setMatches because it must set the previous
// set of matches to empty array.
$this->matches = $this->last;
$this->last = new \SplObjectStorage();
return $this;
}
/**
* Combine the current and previous set of matched objects.
*
* Example:
*
* @code
* qp(document, 'p')->find('div')->andSelf();
* @endcode
*
* The code above will contain a list of all p elements and all div elements that
* are beneath p elements.
*
* @see end();
* @retval object DOMQuery
* A DOMNode object with the results of the last two "destructive" operations.
* @see add()
* @see end()
*/
public function andSelf() {
// This is destructive, so we need to set $last:
$last = $this->matches;
foreach ($this->last as $item) $this->matches->attach($item);
$this->last = $last;
return $this;
}
/**
* Remove all child nodes.
*
* This is equivalent to jQuery's empty() function. (However, empty() is a
* PHP built-in, and cannot be used as a method name.)
*
* @retval object DOMQuery
* The DOMQuery object with the child nodes removed.
* @see replaceWith()
* @see replaceAll()
* @see remove()
*/
public function removeChildren() {
foreach ($this->matches as $m) {
while($kid = $m->firstChild) {
$m->removeChild($kid);
}
}
return $this;
}
/**
* Get the children of the elements in the DOMQuery object.
*
* If a selector is provided, the list of children will be filtered through
* the selector.
*
* @param string $selector
* A valid selector.
* @retval object DOMQuery
* A DOMQuery wrapping all of the children.
* @see removeChildren()
* @see parent()
* @see parents()
* @see next()
* @see prev()
*/
public function children($selector = NULL) {
$found = new \SplObjectStorage();
$filter = strlen($selector) > 0;
if ($filter) {
$tmp = new \SplObjectStorage();
}
foreach ($this->matches as $m) {
foreach($m->childNodes as $c) {
if ($c->nodeType == XML_ELEMENT_NODE) {
// This is basically an optimized filter() just for children().
if ($filter) {
$tmp->attach($c);
$query = new \QueryPath\CSS\DOMTraverser($tmp, TRUE, $c);
$query->find($selector);
if (count($query->matches()) > 0) {
$found->attach($c);
}
$tmp->detach($c);
}
// No filter. Just attach it.
else {
$found->attach($c);
}
}
}
}
$new = $this->inst($found, NULL, $this->options);
return $new;
}
/**
* Get all child nodes (not just elements) of all items in the matched set.
*
* It gets only the immediate children, not all nodes in the subtree.
*
* This does not process iframes. Xinclude processing is dependent on the
* DOM implementation and configuration.
*
* @retval object DOMQuery
* A DOMNode object wrapping all child nodes for all elements in the
* DOMNode object.
* @see find()
* @see text()
* @see html()
* @see innerHTML()
* @see xml()
* @see innerXML()
*/
public function contents() {
$found = new \SplObjectStorage();
foreach ($this->matches as $m) {
if (empty($m->childNodes)) continue; // Issue #51
foreach ($m->childNodes as $c) {
$found->attach($c);
}
}
return $this->inst($found, NULL, $this->options);
}
/**
* Get a list of siblings for elements currently wrapped by this object.
*
* This will compile a list of every sibling of every element in the
* current list of elements.
*
* Note that if two siblings are present in the DOMQuery object to begin with,
* then both will be returned in the matched set, since they are siblings of each
* other. In other words,if the matches contain a and b, and a and b are siblings of
* each other, than running siblings will return a set that contains
* both a and b.
*
* @param string $selector
* If the optional selector is provided, siblings will be filtered through
* this expression.
* @retval object DOMQuery
* The DOMQuery containing the matched siblings.
* @see contents()
* @see children()
* @see parent()
* @see parents()
*/
public function siblings($selector = NULL) {
$found = new \SplObjectStorage();
foreach ($this->matches as $m) {
$parent = $m->parentNode;
foreach ($parent->childNodes as $n) {
if ($n->nodeType == XML_ELEMENT_NODE && $n !== $m) {
$found->attach($n);
}
}
}
if (empty($selector)) {
return $this->inst($found, NULL, $this->options);
}
else {
return $this->inst($found, NULL, $this->options)->filter($selector);
}
}
/**
* Find the closest element matching the selector.
*
* This finds the closest match in the ancestry chain. It first checks the
* present element. If the present element does not match, this traverses up
* the ancestry chain (e.g. checks each parent) looking for an item that matches.
*
* It is provided for jQuery 1.3 compatibility.
* @param string $selector
* A CSS Selector to match.
* @retval object DOMQuery
* The set of matches.
* @since 2.0
*/
public function closest($selector) {
$found = new \SplObjectStorage();
foreach ($this->matches as $m) {
if (QueryPath::with($m, NULL, $this->options)->is($selector) > 0) {
$found->attach($m);
}
else {
while ($m->parentNode->nodeType !== XML_DOCUMENT_NODE) {
$m = $m->parentNode;
// Is there any case where parent node is not an element?
if ($m->nodeType === XML_ELEMENT_NODE && QueryPath::with($m, NULL, $this->options)->is($selector) > 0) {
$found->attach($m);
break;
}
}
}
}
// XXX: Should this be an in-place modification?
return $this->inst($found, NULL, $this->options);
//$this->setMatches($found);
//return $this;
}
/**
* Get the immediate parent of each element in the DOMQuery.
*
* If a selector is passed, this will return the nearest matching parent for
* each element in the DOMQuery.
*
* @param string $selector
* A valid CSS3 selector.
* @retval object DOMQuery
* A DOMNode object wrapping the matching parents.
* @see children()
* @see siblings()
* @see parents()
*/
public function parent($selector = NULL) {
$found = new \SplObjectStorage();
foreach ($this->matches as $m) {
while ($m->parentNode->nodeType !== XML_DOCUMENT_NODE) {
$m = $m->parentNode;
// Is there any case where parent node is not an element?
if ($m->nodeType === XML_ELEMENT_NODE) {
if (!empty($selector)) {
if (QueryPath::with($m, NULL, $this->options)->is($selector) > 0) {
$found->attach($m);
break;
}
}
else {
$found->attach($m);
break;
}
}
}
}
return $this->inst($found, NULL, $this->options);
}
/**
* Get all ancestors of each element in the DOMQuery.
*
* If a selector is present, only matching ancestors will be retrieved.
*
* @see parent()
* @param string $selector
* A valid CSS 3 Selector.
* @retval object DOMQuery
* A DOMNode object containing the matching ancestors.
* @see siblings()
* @see children()
*/
public function parents($selector = NULL) {
$found = new \SplObjectStorage();
foreach ($this->matches as $m) {
while ($m->parentNode->nodeType !== XML_DOCUMENT_NODE) {
$m = $m->parentNode;
// Is there any case where parent node is not an element?
if ($m->nodeType === XML_ELEMENT_NODE) {
if (!empty($selector)) {
if (QueryPath::with($m, NULL, $this->options)->is($selector) > 0)
$found->attach($m);
}
else
$found->attach($m);
}
}
}
return $this->inst($found, NULL, $this->options);
}
/**
* Set or get the markup for an element.
*
* If $markup is set, then the giving markup will be injected into each
* item in the set. All other children of that node will be deleted, and this
* new code will be the only child or children. The markup MUST BE WELL FORMED.
*
* If no markup is given, this will return a string representing the child
* markup of the first node.
*
* <b>Important:</b> This differs from jQuery's html() function. This function
* returns <i>the current node</i> and all of its children. jQuery returns only
* the children. This means you do not need to do things like this:
* @code$qp->parent()->html()@endcode.
*
* By default, this is HTML 4.01, not XHTML. Use {@link xml()} for XHTML.
*
* @param string $markup
* The text to insert.
* @return mixed
* A string if no markup was passed, or a DOMQuery if markup was passed.
* @see xml()
* @see text()
* @see contents()
*/
public function html($markup = NULL) {
if (isset($markup)) {
if ($this->options['replace_entities']) {
$markup = \QueryPath\Entities::replaceAllEntities($markup);
}
// Parse the HTML and insert it into the DOM
//$doc = DOMDocument::loadHTML($markup);
$doc = $this->document->createDocumentFragment();
$doc->appendXML($markup);
$this->removeChildren();
$this->append($doc);
return $this;
}
$length = $this->size();
if ($length == 0) {
return NULL;
}
// Only return the first item -- that's what JQ does.
$first = $this->getFirstMatch();
// Catch cases where first item is not a legit DOM object.
if (!($first instanceof \DOMNode)) {
return NULL;
}
// Added by eabrand.
if(!$first->ownerDocument->documentElement) {
return NULL;
}
if ($first instanceof \DOMDocument || $first->isSameNode($first->ownerDocument->documentElement)) {
return $this->document->saveHTML();
}
// saveHTML cannot take a node and serialize it.
return $this->document->saveXML($first);
}
/**
* Write the QueryPath document to HTML5.
*
* See html()
*/
function html5($markup = NULL) {
$html5 = new \HTML5($this->options);
// append HTML to existing
if (isset($markup)) {
// Parse the HTML and insert it into the DOM
$doc = $html5->loadFragment($markup);
$this->removeChildren();
$this->append($doc);
return $this;
}
$length = $this->size();
if ($length == 0) {
return NULL;
}
// Only return the first item -- that's what JQ does.
$first = $this->getFirstMatch();
// Catch cases where first item is not a legit DOM object.
if (!($first instanceof \DOMNode)) {
return NULL;
}
// Added by eabrand.
if(!$first->ownerDocument->documentElement) {
return NULL;
}
if ($first instanceof \DOMDocument || $first->isSameNode($first->ownerDocument->documentElement)) {
return $html5->saveHTML($this->document); //$this->document->saveHTML();
}
return $html5->saveHTML($first);
}
/**
* Fetch the HTML contents INSIDE of the first DOMQuery item.
*
* <b>This behaves the way jQuery's @codehtml()@endcode function behaves.</b>
*
* This gets all children of the first match in DOMQuery.
*
* Consider this fragment:
* @code
* <div>
* test <p>foo</p> test
* </div>
* @endcode
*
* We can retrieve just the contents of this code by doing something like
* this:
* @code
* qp($xml, 'div')->innerHTML();
* @endcode
*
* This would return the following:
* @codetest <p>foo</p> test@endcode
*
* @return string
* Returns a string representation of the child nodes of the first
* matched element.
* @see html()
* @see innerXML()
* @see innerXHTML()
* @since 2.0
*/
public function innerHTML() {
return $this->innerXML();
}
/**
* Fetch child (inner) nodes of the first match.
*
* This will return the children of the present match. For an example,
* see {@link innerHTML()}.
*
* @see innerHTML()
* @see innerXML()
* @return string
* Returns a string of XHTML that represents the children of the present
* node.
* @since 2.0
*/
public function innerXHTML() {
$length = $this->size();
if ($length == 0) {
return NULL;
}
// Only return the first item -- that's what JQ does.
$first = $this->getFirstMatch();
// Catch cases where first item is not a legit DOM object.
if (!($first instanceof \DOMNode)) {
return NULL;
}
elseif (!$first->hasChildNodes()) {
return '';
}
$buffer = '';
foreach ($first->childNodes as $child) {
$buffer .= $this->document->saveXML($child, LIBXML_NOEMPTYTAG);
}
return $buffer;
}
/**
* Fetch child (inner) nodes of the first match.
*
* This will return the children of the present match. For an example,
* see {@link innerHTML()}.
*
* @see innerHTML()
* @see innerXHTML()
* @return string
* Returns a string of XHTML that represents the children of the present
* node.
* @since 2.0
*/
public function innerXML() {
$length = $this->size();
if ($length == 0) {
return NULL;
}
// Only return the first item -- that's what JQ does.
$first = $this->getFirstMatch();
// Catch cases where first item is not a legit DOM object.
if (!($first instanceof \DOMNode)) {
return NULL;
}
elseif (!$first->hasChildNodes()) {
return '';
}
$buffer = '';
foreach ($first->childNodes as $child) {
$buffer .= $this->document->saveXML($child);
}
return $buffer;
}
/**
* Get child elements as an HTML5 string.
*
* TODO: This is a very simple alteration of innerXML. Do we need better
* support?
*/
public function innerHTML5() {
$length = $this->size();
if ($length == 0) {
return NULL;
}
// Only return the first item -- that's what JQ does.
$first = $this->getFirstMatch();
// Catch cases where first item is not a legit DOM object.
if (!($first instanceof \DOMNode)) {
return NULL;
}
elseif (!$first->hasChildNodes()) {
return '';
}
$html5 = new $HTML5($this->options);
$buffer = '';
foreach ($first->childNodes as $child) {
$buffer .= $html5->saveHTML($child);
}
return $buffer;
}
/**
* Retrieve the text of each match and concatenate them with the given separator.
*
* This has the effect of looping through all children, retrieving their text
* content, and then concatenating the text with a separator.
*
* @param string $sep
* The string used to separate text items. The default is a comma followed by a
* space.
* @param boolean $filterEmpties
* If this is true, empty items will be ignored.
* @return string
* The text contents, concatenated together with the given separator between
* every pair of items.
* @see implode()
* @see text()
* @since 2.0
*/
public function textImplode($sep = ', ', $filterEmpties = TRUE) {
$tmp = array();
foreach ($this->matches as $m) {
$txt = $m->textContent;
$trimmed = trim($txt);
// If filter empties out, then we only add items that have content.
if ($filterEmpties) {
if (strlen($trimmed) > 0) $tmp[] = $txt;
}
// Else add all content, even if it's empty.
else {
$tmp[] = $txt;
}
}
return implode($sep, $tmp);
}
/**
* Get the text contents from just child elements.
*
* This is a specialized variant of textImplode() that implodes text for just the
* child elements of the current element.
*
* @param string $separator
* The separator that will be inserted between found text content.
* @return string
* The concatenated values of all children.
*/
function childrenText($separator = ' ') {
// Branch makes it non-destructive.
return $this->branch()->xpath('descendant::text()')->textImplode($separator);
}
/**
* Get or set the text contents of a node.
* @param string $text
* If this is not NULL, this value will be set as the text of the node. It
* will replace any existing content.
* @return mixed
* A DOMQuery if $text is set, or the text content if no text
* is passed in as a pram.
* @see html()
* @see xml()
* @see contents()
*/
public function text($text = NULL) {
if (isset($text)) {
$this->removeChildren();
foreach ($this->matches as $m) $m->appendChild($this->document->createTextNode($text));
return $this;
}
// Returns all text as one string:
$buf = '';
foreach ($this->matches as $m) $buf .= $m->textContent;
return $buf;
}
/**
* Get or set the text before each selected item.
*
* If $text is passed in, the text is inserted before each currently selected item.
*
* If no text is given, this will return the concatenated text after each selected element.
*
* @code
* <?php
* $xml = '<?xml version="1.0"?><root>Foo<a>Bar</a><b/></root>';
*
* // This will return 'Foo'
* qp($xml, 'a')->textBefore();
*
* // This will insert 'Baz' right before <b/>.
* qp($xml, 'b')->textBefore('Baz');
* ?>
* @endcode
*
* @param string $text
* If this is set, it will be inserted before each node in the current set of
* selected items.
* @return mixed
* Returns the DOMQuery object if $text was set, and returns a string (possibly empty)
* if no param is passed.
*/
public function textBefore($text = NULL) {
if (isset($text)) {
$textNode = $this->document->createTextNode($text);
return $this->before($textNode);
}
$buffer = '';
foreach ($this->matches as $m) {
$p = $m;
while (isset($p->previousSibling) && $p->previousSibling->nodeType == XML_TEXT_NODE) {
$p = $p->previousSibling;
$buffer .= $p->textContent;
}
}
return $buffer;
}
public function textAfter($text = NULL) {
if (isset($text)) {
$textNode = $this->document->createTextNode($text);
return $this->after($textNode);
}
$buffer = '';
foreach ($this->matches as $m) {
$n = $m;
while (isset($n->nextSibling) && $n->nextSibling->nodeType == XML_TEXT_NODE) {
$n = $n->nextSibling;
$buffer .= $n->textContent;
}
}
return $buffer;
}
/**
* Set or get the value of an element's 'value' attribute.
*
* The 'value' attribute is common in HTML form elements. This is a
* convenience function for accessing the values. Since this is not common
* task on the server side, this method may be removed in future releases. (It
* is currently provided for jQuery compatibility.)
*
* If a value is provided in the params, then the value will be set for all
* matches. If no params are given, then the value of the first matched element
* will be returned. This may be NULL.
*
* @deprecated Just use attr(). There's no reason to use this on the server.
* @see attr()
* @param string $value
* @return mixed
* Returns a DOMQuery if a string was passed in, and a string if no string
* was passed in. In the later case, an error will produce NULL.
*/
public function val($value = NULL) {
if (isset($value)) {
$this->attr('value', $value);
return $this;
}
return $this->attr('value');
}
/**
* Set or get XHTML markup for an element or elements.
*
* This differs from {@link html()} in that it processes (and produces)
* strictly XML 1.0 compliant markup.
*
* Like {@link xml()} and {@link html()}, this functions as both a
* setter and a getter.
*
* This is a convenience function for fetching HTML in XML format.
* It does no processing of the markup (such as schema validation).
* @param string $markup
* A string containing XML data.
* @return mixed
* If markup is passed in, a DOMQuery is returned. If no markup is passed
* in, XML representing the first matched element is returned.
* @see html()
* @see innerXHTML()
*/
public function xhtml($markup = NULL) {
// XXX: This is a minor reworking of the original xml() method.
// This should be refactored, probably.
// See http://github.com/technosophos/querypath/issues#issue/10
$omit_xml_decl = $this->options['omit_xml_declaration'];
if ($markup === TRUE) {
// Basically, we handle the special case where we don't
// want the XML declaration to be displayed.
$omit_xml_decl = TRUE;
}
elseif (isset($markup)) {
return $this->xml($markup);
}
$length = $this->size();
if ($length == 0) {
return NULL;
}
// Only return the first item -- that's what JQ does.
$first = $this->getFirstMatch();
// Catch cases where first item is not a legit DOM object.
if (!($first instanceof \DOMNode)) {
return NULL;
}
if ($first instanceof \DOMDocument || $first->isSameNode($first->ownerDocument->documentElement)) {
// Has the unfortunate side-effect of stripping doctype.
//$text = ($omit_xml_decl ? $this->document->saveXML($first->ownerDocument->documentElement, LIBXML_NOEMPTYTAG) : $this->document->saveXML(NULL, LIBXML_NOEMPTYTAG));
$text = $this->document->saveXML(NULL, LIBXML_NOEMPTYTAG);
}
else {
$text = $this->document->saveXML($first, LIBXML_NOEMPTYTAG);
}
// Issue #47: Using the old trick for removing the XML tag also removed the
// doctype. So we remove it with a regex:
if ($omit_xml_decl) {
$text = preg_replace('/<\?xml\s[^>]*\?>/', '', $text);
}
// This is slightly lenient: It allows for cases where code incorrectly places content
// inside of these supposedly unary elements.
$unary = '/<(area|base|basefont|br|col|frame|hr|img|input|isindex|link|meta|param)(?(?=\s)([^>\/]+))><\/[^>]*>/i';
$text = preg_replace($unary, '<\\1\\2 />', $text);
// Experimental: Support for enclosing CDATA sections with comments to be both XML compat
// and HTML 4/5 compat
$cdata = '/(<!\[CDATA\[|\]\]>)/i';
$replace = $this->options['escape_xhtml_js_css_sections'];
$text = preg_replace($cdata, $replace, $text);
return $text;
}
/**
* Set or get the XML markup for an element or elements.
*
* Like {@link html()}, this functions in both a setter and a getter mode.
*
* In setter mode, the string passed in will be parsed and then appended to the
* elements wrapped by this DOMNode object.When in setter mode, this parses
* the XML using the DOMFragment parser. For that reason, an XML declaration
* is not necessary.
*
* In getter mode, the first element wrapped by this DOMNode object will be
* converted to an XML string and returned.
*
* @param string $markup
* A string containing XML data.
* @return mixed
* If markup is passed in, a DOMQuery is returned. If no markup is passed
* in, XML representing the first matched element is returned.
* @see xhtml()
* @see html()
* @see text()
* @see content()
* @see innerXML()
*/
public function xml($markup = NULL) {
$omit_xml_decl = $this->options['omit_xml_declaration'];
if ($markup === TRUE) {
// Basically, we handle the special case where we don't
// want the XML declaration to be displayed.
$omit_xml_decl = TRUE;
}
elseif (isset($markup)) {
if ($this->options['replace_entities']) {
$markup = \QueryPath\Entities::replaceAllEntities($markup);
}
$doc = $this->document->createDocumentFragment();
$doc->appendXML($markup);
$this->removeChildren();
$this->append($doc);
return $this;
}
$length = $this->size();
if ($length == 0) {
return NULL;
}
// Only return the first item -- that's what JQ does.
$first = $this->getFirstMatch();
// Catch cases where first item is not a legit DOM object.
if (!($first instanceof \DOMNode)) {
return NULL;
}
if ($first instanceof \DOMDocument || $first->isSameNode($first->ownerDocument->documentElement)) {
return ($omit_xml_decl ? $this->document->saveXML($first->ownerDocument->documentElement) : $this->document->saveXML());
}
return $this->document->saveXML($first);
}
/**
* Send the XML document to the client.
*
* Write the document to a file path, if given, or
* to stdout (usually the client).
*
* This prints the entire document.
*
* @param string $path
* The path to the file into which the XML should be written. if
* this is NULL, data will be written to STDOUT, which is usually
* sent to the remote browser.
* @param int $options
* (As of QueryPath 2.1) Pass libxml options to the saving mechanism.
* @retval object DOMQuery
* The DOMQuery object, unmodified.
* @see xml()
* @see innerXML()
* @see writeXHTML()
* @throws Exception
* In the event that a file cannot be written, an Exception will be thrown.
*/
public function writeXML($path = NULL, $options = NULL) {
if ($path == NULL) {
print $this->document->saveXML(NULL, $options);
}
else {
try {
set_error_handler(array('\QueryPath\IOException', 'initializeFromError'));
$this->document->save($path, $options);
}
catch (Exception $e) {
restore_error_handler();
throw $e;
}
restore_error_handler();
}
return $this;
}
/**
* Writes HTML to output.
*
* HTML is formatted as HTML 4.01, without strict XML unary tags. This is for
* legacy HTML content. Modern XHTML should be written using {@link toXHTML()}.
*
* Write the document to stdout (usually the client) or to a file.
*
* @param string $path
* The path to the file into which the XML should be written. if
* this is NULL, data will be written to STDOUT, which is usually
* sent to the remote browser.
* @retval object DOMQuery
* The DOMQuery object, unmodified.
* @see html()
* @see innerHTML()
* @throws Exception
* In the event that a file cannot be written, an Exception will be thrown.
*/
public function writeHTML($path = NULL) {
if ($path == NULL) {
print $this->document->saveHTML();
}
else {
try {
set_error_handler(array('\QueryPath\ParseException', 'initializeFromError'));
$this->document->saveHTMLFile($path);
}
catch (Exception $e) {
restore_error_handler();
throw $e;
}
restore_error_handler();
}
return $this;
}
/**
* Write the document to HTML5.
*
* This works the same as the other write* functions, but it encodes the output
* as HTML5 with UTF-8.
* @see html5()
* @see innerHTML5()
* @throws Exception
* In the event that a file cannot be written, an Exception will be thrown.
*/
public function writeHTML5($path = NULL) {
$html5 = new HTML5();
if ($path == NULL) {
// Print the document to stdout.
print $html5->saveHTML($this->document);
return;
}
$html5->save($this->document, $path);
}
/**
* Write an XHTML file to output.
*
* Typically, you should use this instead of {@link writeHTML()}.
*
* Currently, this functions identically to {@link toXML()} <i>except that</i>
* it always uses closing tags (e.g. always @code<script></script>@endcode,
* never @code<script/>@endcode). It will
* write the file as well-formed XML. No XHTML schema validation is done.
*
* @see writeXML()
* @see xml()
* @see writeHTML()
* @see innerXHTML()
* @see xhtml()
* @param string $path
* The filename of the file to write to.
* @retval object DOMQuery
* Returns the DOMQuery, unmodified.
* @throws Exception
* In the event that the output file cannot be written, an exception is
* thrown.
* @since 2.0
*/
public function writeXHTML($path = NULL) {
return $this->writeXML($path, LIBXML_NOEMPTYTAG);
}
/**
* Get the next sibling of each element in the DOMQuery.
*
* If a selector is provided, the next matching sibling will be returned.
*
* @param string $selector
* A CSS3 selector.
* @retval object DOMQuery
* The DOMQuery object.
* @see nextAll()
* @see prev()
* @see children()
* @see contents()
* @see parent()
* @see parents()
*/
public function next($selector = NULL) {
$found = new \SplObjectStorage();
foreach ($this->matches as $m) {
while (isset($m->nextSibling)) {
$m = $m->nextSibling;
if ($m->nodeType === XML_ELEMENT_NODE) {
if (!empty($selector)) {
if (QueryPath::with($m, NULL, $this->options)->is($selector) > 0) {
$found->attach($m);
break;
}
}
else {
$found->attach($m);
break;
}
}
}
}
return $this->inst($found, NULL, $this->options);
}
/**
* Get all siblings after an element.
*
* For each element in the DOMQuery, get all siblings that appear after
* it. If a selector is passed in, then only siblings that match the
* selector will be included.
*
* @param string $selector
* A valid CSS 3 selector.
* @retval object DOMQuery
* The DOMQuery object, now containing the matching siblings.
* @see next()
* @see prevAll()
* @see children()
* @see siblings()
*/
public function nextAll($selector = NULL) {
$found = new \SplObjectStorage();
foreach ($this->matches as $m) {
while (isset($m->nextSibling)) {
$m = $m->nextSibling;
if ($m->nodeType === XML_ELEMENT_NODE) {
if (!empty($selector)) {
if (QueryPath::with($m, NULL, $this->options)->is($selector) > 0) {
$found->attach($m);
}
}
else {
$found->attach($m);
}
}
}
}
return $this->inst($found, NULL, $this->options);
}
/**
* Get the next sibling before each element in the DOMQuery.
*
* For each element in the DOMQuery, this retrieves the previous sibling
* (if any). If a selector is supplied, it retrieves the first matching
* sibling (if any is found).
*
* @param string $selector
* A valid CSS 3 selector.
* @retval object DOMQuery
* A DOMNode object, now containing any previous siblings that have been
* found.
* @see prevAll()
* @see next()
* @see siblings()
* @see children()
*/
public function prev($selector = NULL) {
$found = new \SplObjectStorage();
foreach ($this->matches as $m) {
while (isset($m->previousSibling)) {
$m = $m->previousSibling;
if ($m->nodeType === XML_ELEMENT_NODE) {
if (!empty($selector)) {
if (QueryPath::with($m, NULL, $this->options)->is($selector)) {
$found->attach($m);
break;
}
}
else {
$found->attach($m);
break;
}
}
}
}
return $this->inst($found, NULL, $this->options);
}
/**
* Get the previous siblings for each element in the DOMQuery.
*
* For each element in the DOMQuery, get all previous siblings. If a
* selector is provided, only matching siblings will be retrieved.
*
* @param string $selector
* A valid CSS 3 selector.
* @retval object DOMQuery
* The DOMQuery object, now wrapping previous sibling elements.
* @see prev()
* @see nextAll()
* @see siblings()
* @see contents()
* @see children()
*/
public function prevAll($selector = NULL) {
$found = new \SplObjectStorage();
foreach ($this->matches as $m) {
while (isset($m->previousSibling)) {
$m = $m->previousSibling;
if ($m->nodeType === XML_ELEMENT_NODE) {
if (!empty($selector)) {
if (QueryPath::with($m, NULL, $this->options)->is($selector)) {
$found->attach($m);
}
}
else {
$found->attach($m);
}
}
}
}
return $this->inst($found, NULL, $this->options);
}
/**
* Add a class to all elements in the current DOMQuery.
*
* This searchers for a class attribute on each item wrapped by the current
* DOMNode object. If no attribute is found, a new one is added and its value
* is set to $class. If a class attribute is found, then the value is appended
* on to the end.
*
* @param string $class
* The name of the class.
* @retval object DOMQuery
* Returns the DOMQuery object.
* @see css()
* @see attr()
* @see removeClass()
* @see hasClass()
*/
public function addClass($class) {
foreach ($this->matches as $m) {
if ($m->hasAttribute('class')) {
$val = $m->getAttribute('class');
$m->setAttribute('class', $val . ' ' . $class);
}
else {
$m->setAttribute('class', $class);
}
}
return $this;
}
/**
* Remove the named class from any element in the DOMQuery that has it.
*
* This may result in the entire class attribute being removed. If there
* are other items in the class attribute, though, they will not be removed.
*
* Example:
* Consider this XML:
* @code
* <element class="first second"/>
* @endcode
*
* Executing this fragment of code will remove only the 'first' class:
* @code
* qp(document, 'element')->removeClass('first');
* @endcode
*
* The resulting XML will be:
* @code
* <element class="second"/>
* @endcode
*
* To remove the entire 'class' attribute, you should use {@see removeAttr()}.
*
* @param string $class
* The class name to remove.
* @retval object DOMQuery
* The modified DOMNode object.
* @see attr()
* @see addClass()
* @see hasClass()
*/
public function removeClass($class = false) {
if (empty($class))
{
foreach ($this->matches as $m) {
$m->removeAttribute('class');
}
}else{
$to_remove = array_filter(explode(' ',$class));
foreach ($this->matches as $m) {
if ($m->hasAttribute('class')) {
$vals = array_filter(explode(' ', $m->getAttribute('class')));
$buf = array();
foreach ($vals as $v) {
if (!in_array($v, $to_remove))
$buf[] = $v;
}
if (empty($buf))
$m->removeAttribute('class');
else
$m->setAttribute('class', implode(' ', $buf));
}
}
}
return $this;
}
/**
* Returns TRUE if any of the elements in the DOMQuery have the specified class.
*
* @param string $class
* The name of the class.
* @return boolean
* TRUE if the class exists in one or more of the elements, FALSE otherwise.
* @see addClass()
* @see removeClass()
*/
public function hasClass($class) {
foreach ($this->matches as $m) {
if ($m->hasAttribute('class')) {
$vals = explode(' ', $m->getAttribute('class'));
if (in_array($class, $vals)) return TRUE;
}
}
return FALSE;
}
/**
* Branch the base DOMQuery into another one with the same matches.
*
* This function makes a copy of the DOMQuery object, but keeps the new copy
* (initially) pointed at the same matches. This object can then be queried without
* changing the original DOMQuery. However, changes to the elements inside of this
* DOMQuery will show up in the DOMQuery from which it is branched.
*
* Compare this operation with {@link cloneAll()}. The cloneAll() call takes
* the current DOMNode object and makes a copy of all of its matches. You continue
* to operate on the same DOMNode object, but the elements inside of the DOMQuery
* are copies of those before the call to cloneAll().
*
* This, on the other hand, copies <i>the DOMQuery</i>, but keeps valid
* references to the document and the wrapped elements. A new query branch is
* created, but any changes will be written back to the same document.
*
* In practice, this comes in handy when you want to do multiple queries on a part
* of the document, but then return to a previous set of matches. (see {@link QPTPL}
* for examples of this in practice).
*
* Example:
*
* @code
* <?php
* $qp = qp( QueryPath::HTML_STUB);
* $branch = $qp->branch();
* $branch->find('title')->text('Title');
* $qp->find('body')->text('This is the body')->writeHTML;
* ?>
* @endcode
*
* Notice that in the code, each of the DOMQuery objects is doing its own
* query. However, both are modifying the same document. The result of the above
* would look something like this:
*
* @code
* <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
* <html xmlns="http://www.w3.org/1999/xhtml">
* <head>
* <meta http-equiv="Content-Type" content="text/html; charset=utf-8"></meta>
* <title>Title</title>
* </head>
* <body>This is the body</body>
* </html>
* @endcode
*
* Notice that while $qp and $banch were performing separate queries, they
* both modified the same document.
*
* In jQuery or a browser-based solution, you generally do not need a branching
* function because there is (implicitly) only one document. In QueryPath, there
* is no implicit document. Every document must be explicitly specified (and,
* in most cases, parsed -- which is costly). Branching makes it possible to
* work on one document with multiple DOMNode objects.
*
* @param string $selector
* If a selector is passed in, an additional {@link find()} will be executed
* on the branch before it is returned. (Added in QueryPath 2.0.)
* @retval object DOMQuery
* A copy of the DOMQuery object that points to the same set of elements that
* the original DOMQuery was pointing to.
* @since 1.1
* @see cloneAll()
* @see find()
*/
public function branch($selector = NULL) {
$temp = \QueryPath::with($this->matches, NULL, $this->options);
//if (isset($selector)) $temp->find($selector);
$temp->document = $this->document;
if (isset($selector)) $temp->findInPlace($selector);
return $temp;
}
protected function inst($matches, $selector, $options) {
/*
$temp = \QueryPath::with($matches, NULL, $options);
//if (isset($selector)) $temp->find($selector);
$temp->document = $this->document;
if (isset($selector)) $temp->findInPlace($selector);
return $temp;
*/
// https://en.wikipedia.org/wiki/Dolly_(sheep)
$dolly = clone $this;
$dolly->setMatches($matches);
//var_dump($dolly); exit;
if (isset($selector)) $dolly->findInPlace($selector);
return $dolly;
}
/**
* Perform a deep clone of each node in the DOMQuery.
*
* @attention
* This is an in-place modification of the current QueryPath object.
*
* This does not clone the DOMQuery object, but instead clones the
* list of nodes wrapped by the DOMQuery. Every element is deeply
* cloned.
*
* This method is analogous to jQuery's clone() method.
*
* This is a destructive operation, which means that end() will revert
* the list back to the clone's original.
* @see qp()
* @retval object DOMQuery
*/
public function cloneAll() {
$found = new \SplObjectStorage();
foreach ($this->matches as $m) $found->attach($m->cloneNode(TRUE));
//return $this->inst($found, NULL, $this->options);
$this->setMatches($found);
return $this;
}
/**
* Clone the DOMQuery.
*
* This makes a deep clone of the elements inside of the DOMQuery.
*
* This clones only the QueryPathImpl, not all of the decorators. The
* clone operator in PHP should handle the cloning of the decorators.
*/
public function __clone() {
//XXX: Should we clone the document?
// Make sure we clone the kids.
$this->cloneAll();
}
/**
* Detach any items from the list if they match the selector.
*
* In other words, each item that matches the selector will be removed
* from the DOM document. The returned DOMQuery wraps the list of
* removed elements.
*
* If no selector is specified, this will remove all current matches from
* the document.
*
* @param string $selector
* A CSS Selector.
* @retval object DOMQuery
* The Query path wrapping a list of removed items.
* @see replaceAll()
* @see replaceWith()
* @see removeChildren()
* @since 2.1
* @author eabrand
*/
public function detach($selector = NULL) {
if(!empty($selector))
$this->find($selector);
$found = new \SplObjectStorage();
$this->last = $this->matches;
foreach ($this->matches as $item) {
// The item returned is (according to docs) different from
// the one passed in, so we have to re-store it.
$found->attach($item->parentNode->removeChild($item));
}
return $this->inst($found, NULL, $this->options);
}
/**
* Attach any items from the list if they match the selector.
*
* If no selector is specified, this will remove all current matches from
* the document.
*
* @param DOMQuery $dest
* A DOMQuery Selector.
* @retval object DOMQuery
* The Query path wrapping a list of removed items.
* @see replaceAll()
* @see replaceWith()
* @see removeChildren()
* @since 2.1
* @author eabrand
*/
public function attach(DOMQuery $dest) {
foreach ($this->last as $m) $dest->append($m);
return $this;
}
/**
* Reduce the elements matched by DOMQuery to only those which contain the given item.
*
* There are two ways in which this is different from jQuery's implementation:
* - We allow ANY DOMNode, not just DOMElements. That means this will work on
* processor instructions, text nodes, comments, etc.
* - Unlike jQuery, this implementation of has() follows QueryPath standard behavior
* and modifies the existing object. It does not create a brand new object.
*
* @param mixed $contained
* - If $contained is a CSS selector (e.g. '#foo'), this will test to see
* if the current DOMQuery has any elements that contain items that match
* the selector.
* - If $contained is a DOMNode, then this will test to see if THE EXACT DOMNode
* exists in the currently matched elements. (Note that you cannot match across DOM trees, even if it is the same document.)
* @since 2.1
* @author eabrand
* @todo It would be trivially easy to add support for iterating over an array or Iterable of DOMNodes.
*/
public function has($contained) {
/*
if (count($this->matches) == 0) {
return false;
}
*/
$found = new \SplObjectStorage();
// If it's a selector, we just get all of the DOMNodes that match the selector.
$nodes = array();
if (is_string($contained)) {
// Get the list of nodes.
$nodes = $this->branch($contained)->get();
}
elseif ($contained instanceof \DOMNode) {
// Make a list with one node.
$nodes = array($contained);
}
// Now we go through each of the nodes that we are testing. We want to find
// ALL PARENTS that are in our existing DOMQuery matches. Those are the
// ones we add to our new matches.
foreach ($nodes as $original_node) {
$node = $original_node;
while (!empty($node)/* && $node != $node->ownerDocument*/) {
if ($this->matches->contains($node)) {
$found->attach($node);
}
$node = $node->parentNode;
}
}
return $this->inst($found, NULL, $this->options);
}
/**
* Empty everything within the specified element.
*
* A convenience function for removeChildren(). This is equivalent to jQuery's
* empty() function. However, `empty` is a built-in in PHP, and cannot be used as a
* function name.
*
* @retval object DOMQuery
* The DOMQuery object with the newly emptied elements.
* @see removeChildren()
* @since 2.1
* @author eabrand
* @deprecated The removeChildren() function is the preferred method.
*/
public function emptyElement() {
$this->removeChildren();
return $this;
}
/**
* Get the even elements, so counter-intuitively 1, 3, 5, etc.
*
*
*
* @retval object DOMQuery
* A DOMQuery wrapping all of the children.
* @see removeChildren()
* @see parent()
* @see parents()
* @see next()
* @see prev()
* @since 2.1
* @author eabrand
*/
public function even() {
$found = new \SplObjectStorage();
$even = false;
foreach ($this->matches as $m) {
if ($even && $m->nodeType == XML_ELEMENT_NODE) $found->attach($m);
$even = ($even) ? false : true;
}
return $this->inst($found, NULL, $this->options);
}
/**
* Get the odd elements, so counter-intuitively 0, 2, 4, etc.
*
*
*
* @retval object DOMQuery
* A DOMQuery wrapping all of the children.
* @see removeChildren()
* @see parent()
* @see parents()
* @see next()
* @see prev()
* @since 2.1
* @author eabrand
*/
public function odd() {
$found = new \SplObjectStorage();
$odd = true;
foreach ($this->matches as $m) {
if ($odd && $m->nodeType == XML_ELEMENT_NODE) $found->attach($m);
$odd = ($odd) ? false : true;
}
return $this->inst($found, NULL, $this->options);
}
/**
* Get the first matching element.
*
*
* @retval object DOMQuery
* A DOMQuery wrapping all of the children.
* @see next()
* @see prev()
* @since 2.1
* @author eabrand
*/
public function first() {
$found = new \SplObjectStorage();
foreach ($this->matches as $m) {
if ($m->nodeType == XML_ELEMENT_NODE) {
$found->attach($m);
break;
}
}
return $this->inst($found, NULL, $this->options);
}
/**
* Get the first child of the matching element.
*
*
* @retval object DOMQuery
* A DOMQuery wrapping all of the children.
* @see next()
* @see prev()
* @since 2.1
* @author eabrand
*/
public function firstChild() {
// Could possibly use $m->firstChild http://theserverpages.com/php/manual/en/ref.dom.php
$found = new \SplObjectStorage();
$flag = false;
foreach ($this->matches as $m) {
foreach($m->childNodes as $c) {
if ($c->nodeType == XML_ELEMENT_NODE) {
$found->attach($c);
$flag = true;
break;
}
}
if($flag) break;
}
return $this->inst($found, NULL, $this->options);
}
/**
* Get the last matching element.
*
*
* @retval object DOMQuery
* A DOMQuery wrapping all of the children.
* @see next()
* @see prev()
* @since 2.1
* @author eabrand
*/
public function last() {
$found = new \SplObjectStorage();
$item = null;
foreach ($this->matches as $m) {
if ($m->nodeType == XML_ELEMENT_NODE) {
$item = $m;
}
}
if ($item) {
$found->attach($item);
}
return $this->inst($found, NULL, $this->options);
}
/**
* Get the last child of the matching element.
*
*
* @retval object DOMQuery
* A DOMQuery wrapping all of the children.
* @see next()
* @see prev()
* @since 2.1
* @author eabrand
*/
public function lastChild() {
$found = new \SplObjectStorage();
$item = null;
foreach ($this->matches as $m) {
foreach($m->childNodes as $c) {
if ($c->nodeType == XML_ELEMENT_NODE) {
$item = $c;
}
}
if ($item) {
$found->attach($item);
$item = null;
}
}
return $this->inst($found, NULL, $this->options);
}
/**
* Get all siblings after an element until the selector is reached.
*
* For each element in the DOMQuery, get all siblings that appear after
* it. If a selector is passed in, then only siblings that match the
* selector will be included.
*
* @param string $selector
* A valid CSS 3 selector.
* @retval object DOMQuery
* The DOMQuery object, now containing the matching siblings.
* @see next()
* @see prevAll()
* @see children()
* @see siblings()
* @since 2.1
* @author eabrand
*/
public function nextUntil($selector = NULL) {
$found = new \SplObjectStorage();
foreach ($this->matches as $m) {
while (isset($m->nextSibling)) {
$m = $m->nextSibling;
if ($m->nodeType === XML_ELEMENT_NODE) {
if (!empty($selector)) {
if (QueryPath::with($m, NULL, $this->options)->is($selector) > 0) {
break;
}
else {
$found->attach($m);
}
}
else {
$found->attach($m);
}
}
}
}
return $this->inst($found, NULL, $this->options);
}
/**
* Get the previous siblings for each element in the DOMQuery
* until the selector is reached.
*
* For each element in the DOMQuery, get all previous siblings. If a
* selector is provided, only matching siblings will be retrieved.
*
* @param string $selector
* A valid CSS 3 selector.
* @retval object DOMQuery
* The DOMQuery object, now wrapping previous sibling elements.
* @see prev()
* @see nextAll()
* @see siblings()
* @see contents()
* @see children()
* @since 2.1
* @author eabrand
*/
public function prevUntil($selector = NULL) {
$found = new \SplObjectStorage();
foreach ($this->matches as $m) {
while (isset($m->previousSibling)) {
$m = $m->previousSibling;
if ($m->nodeType === XML_ELEMENT_NODE) {
if (!empty($selector) && QueryPath::with($m, NULL, $this->options)->is($selector))
break;
else
$found->attach($m);
}
}
}
return $this->inst($found, NULL, $this->options);
}
/**
* Get all ancestors of each element in the DOMQuery until the selector is reached.
*
* If a selector is present, only matching ancestors will be retrieved.
*
* @see parent()
* @param string $selector
* A valid CSS 3 Selector.
* @retval object DOMQuery
* A DOMNode object containing the matching ancestors.
* @see siblings()
* @see children()
* @since 2.1
* @author eabrand
*/
public function parentsUntil($selector = NULL) {
$found = new \SplObjectStorage();
foreach ($this->matches as $m) {
while ($m->parentNode->nodeType !== XML_DOCUMENT_NODE) {
$m = $m->parentNode;
// Is there any case where parent node is not an element?
if ($m->nodeType === XML_ELEMENT_NODE) {
if (!empty($selector)) {
if (QueryPath::with($m, NULL, $this->options)->is($selector) > 0)
break;
else
$found->attach($m);
}
else
$found->attach($m);
}
}
}
return $this->inst($found, NULL, $this->options);
}
/////// INTERNAL FUNCTIONS ////////
/**
* Determine whether a given string looks like XML or not.
*
* Basically, this scans a portion of the supplied string, checking to see
* if it has a tag-like structure. It is possible to "confuse" this, which
* may subsequently result in parse errors, but in the vast majority of
* cases, this method serves as a valid inicator of whether or not the
* content looks like XML.
*
* Things that are intentional excluded:
* - plain text with no markup.
* - strings that look like filesystem paths.
*
* Subclasses SHOULD NOT OVERRIDE THIS. Altering it may be altering
* core assumptions about how things work. Instead, classes should
* override the constructor and pass in only one of the parsed types
* that this class expects.
*/
protected function isXMLish($string) {
return (strpos($string, '<') !== FALSE && strpos($string, '>') !== FALSE);
}
private function parseXMLString($string, $flags = NULL) {
$document = new \DOMDocument('1.0');
$lead = strtolower(substr($string, 0, 5)); // <?xml
try {
set_error_handler(array('\QueryPath\ParseException', 'initializeFromError'), $this->errTypes);
if (isset($this->options['convert_to_encoding'])) {
// Is there another way to do this?
$from_enc = isset($this->options['convert_from_encoding']) ? $this->options['convert_from_encoding'] : 'auto';
$to_enc = $this->options['convert_to_encoding'];
if (function_exists('mb_convert_encoding')) {
$string = mb_convert_encoding($string, $to_enc, $from_enc);
}
}
// This is to avoid cases where low ascii digits have slipped into HTML.
// AFAIK, it should not adversly effect UTF-8 documents.
if (!empty($this->options['strip_low_ascii'])) {
$string = filter_var($string, FILTER_UNSAFE_RAW, FILTER_FLAG_ENCODE_LOW);
}
// Allow users to override parser settings.
if (empty($this->options['use_parser'])) {
$useParser = '';
}
else {
$useParser = strtolower($this->options['use_parser']);
}
// If HTML parser is requested, we use it.
if ($useParser == 'html') {
$document->loadHTML($string);
}
// Parse as XML if it looks like XML, or if XML parser is requested.
elseif ($lead == '<?xml' || $useParser == 'xml') {
if ($this->options['replace_entities']) {
$string = \QueryPath\Entities::replaceAllEntities($string);
}
$document->loadXML($string, $flags);
}
// In all other cases, we try the HTML parser.
else {
$document->loadHTML($string);
}
}
// Emulate 'finally' behavior.
catch (Exception $e) {
restore_error_handler();
throw $e;
}
restore_error_handler();
if (empty($document)) {
throw new \QueryPath\ParseException('Unknown parser exception.');
}
return $document;
}
/**
* EXPERT: Be very, very careful using this.
* A utility function for setting the current set of matches.
* It makes sure the last matches buffer is set (for end() and andSelf()).
* @since 2.0
*/
public function setMatches($matches, $unique = TRUE) {
// This causes a lot of overhead....
//if ($unique) $matches = self::unique($matches);
$this->last = $this->matches;
// Just set current matches.
if ($matches instanceof \SplObjectStorage) {
$this->matches = $matches;
}
// This is likely legacy code that needs conversion.
elseif (is_array($matches)) {
trigger_error('Legacy array detected.');
$tmp = new \SplObjectStorage();
foreach ($matches as $m) $tmp->attach($m);
$this->matches = $tmp;
}
// For non-arrays, try to create a new match set and
// add this object.
else {
$found = new \SplObjectStorage();
if (isset($matches)) $found->attach($matches);
$this->matches = $found;
}
// EXPERIMENTAL: Support for qp()->length.
$this->length = $this->matches->count();
}
/**
* Set the match monitor to empty.
*
* This preserves history.
*
* @since 2.0
*/
private function noMatches() {
$this->setMatches(NULL);
}
/**
* A utility function for retriving a match by index.
*
* The internal data structure used in DOMQuery does not have
* strong random access support, so we suppliment it with this method.
*/
private function getNthMatch($index) {
if ($index > $this->matches->count() || $index < 0) return;
$i = 0;
foreach ($this->matches as $m) {
if ($i++ == $index) return $m;
}
}
/**
* Convenience function for getNthMatch(0).
*/
private function getFirstMatch() {
$this->matches->rewind();
return $this->matches->current();
}
/**
* Parse an XML or HTML file.
*
* This attempts to autodetect the type of file, and then parse it.
*
* @param string $filename
* The file name to parse.
* @param int $flags
* The OR-combined flags accepted by the DOM parser. See the PHP documentation
* for DOM or for libxml.
* @param resource $context
* The stream context for the file IO. If this is set, then an alternate
* parsing path is followed: The file is loaded by PHP's stream-aware IO
* facilities, read entirely into memory, and then handed off to
* {@link parseXMLString()}. On large files, this can have a performance impact.
* @throws \QueryPath\ParseException
* Thrown when a file cannot be loaded or parsed.
*/
private function parseXMLFile($filename, $flags = NULL, $context = NULL) {
// If a context is specified, we basically have to do the reading in
// two steps:
if (!empty($context)) {
try {
set_error_handler(array('\QueryPath\ParseException', 'initializeFromError'), $this->errTypes);
$contents = file_get_contents($filename, FALSE, $context);
}
// Apparently there is no 'finally' in PHP, so we have to restore the error
// handler this way:
catch(Exception $e) {
restore_error_handler();
throw $e;
}
restore_error_handler();
if ($contents == FALSE) {
throw new \QueryPath\ParseException(sprintf('Contents of the file %s could not be retrieved.', $filename));
}
return $this->parseXMLString($contents, $flags);
}
$document = new \DOMDocument();
$lastDot = strrpos($filename, '.');
$htmlExtensions = array(
'.html' => 1,
'.htm' => 1,
);
// Allow users to override parser settings.
if (empty($this->options['use_parser'])) {
$useParser = '';
}
else {
$useParser = strtolower($this->options['use_parser']);
}
$ext = $lastDot !== FALSE ? strtolower(substr($filename, $lastDot)) : '';
try {
set_error_handler(array('\QueryPath\ParseException', 'initializeFromError'), $this->errTypes);
// If the parser is explicitly set to XML, use that parser.
if ($useParser == 'xml') {
$r = $document->load($filename, $flags);
}
// Otherwise, see if it looks like HTML.
elseif (isset($htmlExtensions[$ext]) || $useParser == 'html') {
// Try parsing it as HTML.
$r = $document->loadHTMLFile($filename);
}
// Default to XML.
else {
$r = $document->load($filename, $flags);
}
}
// Emulate 'finally' behavior.
catch (Exception $e) {
restore_error_handler();
throw $e;
}
restore_error_handler();
return $document;
}
/**
* Call extension methods.
*
* This function is used to invoke extension methods. It searches the
* registered extenstensions for a matching function name. If one is found,
* it is executed with the arguments in the $arguments array.
*
* @throws QueryPath::Exception
* An exception is thrown if a non-existent method is called.
*/
public function __call($name, $arguments) {
if (!ExtensionRegistry::$useRegistry) {
throw new \QueryPath\Exception("No method named $name found (Extensions disabled).");
}
// Loading of extensions is deferred until the first time a
// non-core method is called. This makes constructing faster, but it
// may make the first invocation of __call() slower (if there are
// enough extensions.)
//
// The main reason for moving this out of the constructor is that most
// new DOMQuery instances do not use extensions. Charging qp() calls
// with the additional hit is not a good idea.
//
// Also, this will at least limit the number of circular references.
if (empty($this->ext)) {
// Load the registry
$this->ext = ExtensionRegistry::getExtensions($this);
}
// Note that an empty ext registry indicates that extensions are disabled.
if (!empty($this->ext) && ExtensionRegistry::hasMethod($name)) {
$owner = ExtensionRegistry::getMethodClass($name);
$method = new \ReflectionMethod($owner, $name);
return $method->invokeArgs($this->ext[$owner], $arguments);
}
throw new \QueryPath\Exception("No method named $name found. Possibly missing an extension.");
}
/**
* Get an iterator for the matches in this object.
* @return Iterable
* Returns an iterator.
*/
public function getIterator() {
$i = new QueryPathIterator($this->matches);
$i->options = $this->options;
return $i;
}
}