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phpQueryObject.php
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3446 lines (3399 loc) · 90.7 KB
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<?php
/**
* Class representing phpQuery objects.
*
* @author Tobiasz Cudnik <tobiasz.cudnik/gmail.com>
* @package phpQuery
* @method phpQueryObject clone() clone()
* @method phpQueryObject empty() empty()
* @method phpQueryObject next() next($selector = null)
* @method phpQueryObject prev() prev($selector = null)
* @property Int $length
*/
class phpQueryObject implements Iterator, Countable, ArrayAccess {
public $documentID = null;
/**
* DOMDocument class.
*
* @var DOMDocument
*/
public $document = null;
public $charset = null;
/**
*
* @var DOMDocumentWrapper
*/
public $documentWrapper = null;
/**
* XPath interface.
*
* @var DOMXPath
*/
public $xpath = null;
/**
* Stack of selected elements.
* @TODO refactor to ->nodes
* @var array
*/
public $elements = array();
/**
* @access private
*/
protected $elementsBackup = array();
/**
* @access private
*/
protected $previous = null;
/**
* @access private
* @TODO deprecate
*/
protected $root = array();
/**
* Indicated if doument is just a fragment (no <html> tag).
*
* Every document is realy a full document, so even documentFragments can
* be queried against <html>, but getDocument(id)->htmlOuter() will return
* only contents of <body>.
*
* @var bool
*/
public $documentFragment = true;
/**
* Iterator interface helper
* @access private
*/
protected $elementsInterator = array();
/**
* Iterator interface helper
* @access private
*/
protected $valid = false;
/**
* Iterator interface helper
* @access private
*/
protected $current = null;
/**
* Enter description here...
*
* @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
*/
public function __construct($documentID) {
// if ($documentID instanceof self)
// var_dump($documentID->getDocumentID());
$id = $documentID instanceof self
? $documentID->getDocumentID()
: $documentID;
// var_dump($id);
if (!isset(phpQuery::$documents[$id])) {
// var_dump(phpQuery::$documents);
throw new Exception("Document with ID '{$id}' isn't loaded. Use phpQuery::newDocument(\$html) or phpQuery::newDocumentFile(\$file) first.");
}
$this->documentID = $id;
$this->documentWrapper = &phpQuery::$documents[$id];
$this->document = &$this->documentWrapper->document;
$this->xpath = &$this->documentWrapper->xpath;
$this->charset = &$this->documentWrapper->charset;
$this->documentFragment = &$this->documentWrapper->isDocumentFragment;
// TODO check $this->DOM->documentElement;
// $this->root = $this->document->documentElement;
$this->root = &$this->documentWrapper->root;
// $this->toRoot();
$this->elements = array($this->root);
}
/**
*
* @access private
* @param $attr
* @return unknown_type
*/
public function __get($attr) {
switch ($attr) {
// FIXME doesnt work at all ?
case 'length':
return $this->size();
break;
default:
return $this->$attr;
}
}
/**
* Saves actual object to $var by reference.
* Useful when need to break chain.
* @param phpQueryObject $var
* @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
*/
public function toReference(&$var) {
return $var = $this;
}
public function documentFragment($state = null) {
if ($state) {
phpQuery::$documents[$this->getDocumentID()]['documentFragment'] = $state;
return $this;
}
return $this->documentFragment;
}
/**
* @access private
* @TODO documentWrapper
*/
protected function isRoot($node) {
// return $node instanceof DOMDOCUMENT || $node->tagName == 'html';
return $node instanceof DOMDOCUMENT
|| ($node instanceof DOMELEMENT && $node->tagName == 'html')
|| $this->root->isSameNode($node);
}
/**
* @access private
*/
protected function stackIsRoot() {
return $this->size() == 1 && $this->isRoot($this->elements[0]);
}
/**
* Enter description here...
* NON JQUERY METHOD
*
* Watch out, it doesn't creates new instance, can be reverted with end().
*
* @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
*/
public function toRoot() {
$this->elements = array($this->root);
return $this;
// return $this->newInstance(array($this->root));
}
/**
* Saves object's DocumentID to $var by reference.
* <code>
* $myDocumentId;
* phpQuery::newDocument('<div/>')
* ->getDocumentIDRef($myDocumentId)
* ->find('div')->...
* </code>
*
* @param unknown_type $domId
* @see phpQuery::newDocument
* @see phpQuery::newDocumentFile
* @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
*/
public function getDocumentIDRef(&$documentID) {
$documentID = $this->getDocumentID();
return $this;
}
/**
* Returns object with stack set to document root.
*
* @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
*/
public function getDocument() {
return phpQuery::getDocument($this->getDocumentID());
}
/**
*
* @return DOMDocument
*/
public function getDOMDocument() {
return $this->document;
}
/**
* Get object's Document ID.
*
* @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
*/
public function getDocumentID() {
return $this->documentID;
}
/**
* Unloads whole document from memory.
* CAUTION! None further operations will be possible on this document.
* All objects refering to it will be useless.
*
* @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
*/
public function unloadDocument() {
phpQuery::unloadDocuments($this->getDocumentID());
}
public function isHTML() {
return $this->documentWrapper->isHTML;
}
public function isXHTML() {
return $this->documentWrapper->isXHTML;
}
public function isXML() {
return $this->documentWrapper->isXML;
}
/**
* Enter description here...
*
* @link http://docs.jquery.com/Ajax/serialize
* @return string
*/
public function serialize() {
// serializeArray() returns a flat array of associative arrays with name and value elements,
// which matches what jQuery does. jQuery does that to allow multiple elements with the
// same name, which an object (equivalent to an associative array in PHP) wouldn't.
// OK, but to turn it into a valid query string we can't just call param() and therefore
// http_build_query(), which expects an associative array. To get the "multiple elements with the
// same name" feature and still serialize() properly we have to reimplement
// http_build_query. tom@punkave.com
$s = '';
$flat = $this->serializeArray();
foreach ($flat as $pair) {
if (strlen($s)) {
$s .= '&';
}
$s .= urlencode($pair['name']);
$s .= '=';
$s .= urlencode($pair['value']);
}
return $s;
}
/**
* Enter description here...
*
* @link http://docs.jquery.com/Ajax/serializeArray
* @return array
*/
public function serializeArray($submit = null) {
$source = $this->filter('form, input, select, textarea')
->find('input, select, textarea')
->andSelf()
->not('form');
$return = array();
// $source->dumpDie();
foreach ($source as $input) {
$input = phpQuery::pq($input);
if ($input->is('[disabled]')) {
continue;
}
if (!$input->is('[name]')) {
continue;
}
if ($input->is('[type=checkbox]') && !$input->is('[checked]')) {
continue;
}
// jquery diff
if ($submit && $input->is('[type=submit]')) {
if ($submit instanceof DOMELEMENT && !$input->elements[0]->isSameNode($submit)) {
continue;
} else if (is_string($submit) && $input->attr('name') != $submit) {
continue;
}
}
$return[] = array(
'name' => $input->attr('name'),
'value' => $input->val(),
);
}
return $return;
}
/**
* @access private
*/
protected function debug($in) {
if (!phpQuery::$debug) {
return;
}
print('<pre>');
print_r($in);
// file debug
// file_put_contents(dirname(__FILE__).'/phpQuery.log', print_r($in, true)."\n", FILE_APPEND);
// quite handy debug trace
// if ( is_array($in))
// print_r(array_slice(debug_backtrace(), 3));
print("</pre>\n");
}
/**
* @access private
*/
protected function isRegexp($pattern) {
return in_array(
$pattern[mb_strlen($pattern) - 1],
array('^', '*', '$')
);
}
/**
* Determines if $char is really a char.
*
* @param string $char
* @return bool
* @todo rewrite me to charcode range ! ;)
* @access private
*/
protected function isChar($char) {
return extension_loaded('mbstring') && phpQuery::$mbstringSupport
? mb_eregi('\w', $char)
: preg_match('@\w@', $char);
}
/**
* @access private
*/
protected function parseSelector($query) {
// clean spaces
// TODO include this inside parsing ?
$query = trim(
preg_replace('@\s+@', ' ',
preg_replace('@\s*(>|\\+|~)\s*@', '\\1', $query)
)
);
$queries = array(array());
if (!$query) {
return $queries;
}
$return = &$queries[0];
$specialChars = array('>', ' ');
// $specialCharsMapping = array('/' => '>');
$specialCharsMapping = array();
$strlen = mb_strlen($query);
$classChars = array('.', '-');
$pseudoChars = array('-');
$tagChars = array('*', '|', '-');
// split multibyte string
// http://code.google.com/p/phpquery/issues/detail?id=76
$_query = array();
for ($i = 0; $i < $strlen; $i++) {
$_query[] = mb_substr($query, $i, 1);
}
$query = $_query;
// it works, but i dont like it...
$i = 0;
while ($i < $strlen) {
$c = $query[$i];
$tmp = '';
// TAG
if ($this->isChar($c) || in_array($c, $tagChars)) {
while (isset($query[$i])
&& ($this->isChar($query[$i]) || in_array($query[$i], $tagChars))) {
$tmp .= $query[$i];
$i++;
}
$return[] = $tmp;
// IDs
} else if ($c == '#') {
$i++;
while (isset($query[$i]) && ($this->isChar($query[$i]) || $query[$i] == '-')) {
$tmp .= $query[$i];
$i++;
}
$return[] = '#' . $tmp;
// SPECIAL CHARS
} else if (in_array($c, $specialChars)) {
$return[] = $c;
$i++;
// MAPPED SPECIAL MULTICHARS
// } else if ( $c.$query[$i+1] == '//') {
// $return[] = ' ';
// $i = $i+2;
// MAPPED SPECIAL CHARS
} else if (isset($specialCharsMapping[$c])) {
$return[] = $specialCharsMapping[$c];
$i++;
// COMMA
} else if ($c == ',') {
$queries[] = array();
$return = &$queries[count($queries) - 1];
$i++;
while (isset($query[$i]) && $query[$i] == ' ') {
$i++;
}
// CLASSES
} else if ($c == '.') {
while (isset($query[$i]) && ($this->isChar($query[$i]) || in_array($query[$i], $classChars))) {
$tmp .= $query[$i];
$i++;
}
$return[] = $tmp;
// ~ General Sibling Selector
} else if ($c == '~') {
$spaceAllowed = true;
$tmp .= $query[$i++];
while (isset($query[$i])
&& ($this->isChar($query[$i])
|| in_array($query[$i], $classChars)
|| $query[$i] == '*'
|| ($query[$i] == ' ' && $spaceAllowed)
)) {
if ($query[$i] != ' ') {
$spaceAllowed = false;
}
$tmp .= $query[$i];
$i++;
}
$return[] = $tmp;
// + Adjacent sibling selectors
} else if ($c == '+') {
$spaceAllowed = true;
$tmp .= $query[$i++];
while (isset($query[$i])
&& ($this->isChar($query[$i])
|| in_array($query[$i], $classChars)
|| $query[$i] == '*'
|| ($spaceAllowed && $query[$i] == ' ')
)) {
if ($query[$i] != ' ') {
$spaceAllowed = false;
}
$tmp .= $query[$i];
$i++;
}
$return[] = $tmp;
// ATTRS
} else if ($c == '[') {
$stack = 1;
$tmp .= $c;
while (isset($query[++$i])) {
$tmp .= $query[$i];
if ($query[$i] == '[') {
$stack++;
} else if ($query[$i] == ']') {
$stack--;
if (!$stack) {
break;
}
}
}
$return[] = $tmp;
$i++;
// PSEUDO CLASSES
} else if ($c == ':') {
$stack = 1;
$tmp .= $query[$i++];
while (isset($query[$i]) && ($this->isChar($query[$i]) || in_array($query[$i], $pseudoChars))) {
$tmp .= $query[$i];
$i++;
}
// with arguments ?
if (isset($query[$i]) && $query[$i] == '(') {
$tmp .= $query[$i];
$stack = 1;
while (isset($query[++$i])) {
$tmp .= $query[$i];
if ($query[$i] == '(') {
$stack++;
} else if ($query[$i] == ')') {
$stack--;
if (!$stack) {
break;
}
}
}
$return[] = $tmp;
$i++;
} else {
$return[] = $tmp;
}
} else {
$i++;
}
}
foreach ($queries as $k => $q) {
if (isset($q[0])) {
if (isset($q[0][0]) && $q[0][0] == ':') {
array_unshift($queries[$k], '*');
}
if ($q[0] != '>') {
array_unshift($queries[$k], ' ');
}
}
}
return $queries;
}
/**
* Return matched DOM nodes.
*
* @param int $index
* @return array|DOMElement Single DOMElement or array of DOMElement.
*/
public function get($index = null, $callback1 = null, $callback2 = null, $callback3 = null) {
$return = isset($index)
? (isset($this->elements[$index]) ? $this->elements[$index] : null)
: $this->elements;
// pass thou callbacks
$args = func_get_args();
$args = array_slice($args, 1);
foreach ($args as $callback) {
if (is_array($return)) {
foreach ($return as $k => $v) {
$return[$k] = phpQuery::callbackRun($callback, array($v));
}
} else {
$return = phpQuery::callbackRun($callback, array($return));
}
}
return $return;
}
/**
* Return matched DOM nodes.
* jQuery difference.
*
* @param int $index
* @return array|string Returns string if $index != null
* @todo implement callbacks
* @todo return only arrays ?
* @todo maybe other name...
*/
public function getString($index = null, $callback1 = null, $callback2 = null, $callback3 = null) {
if ($index) {
$return = $this->eq($index)->text();
} else {
$return = array();
for ($i = 0; $i < $this->size(); $i++) {
$return[] = $this->eq($i)->text();
}
}
// pass thou callbacks
$args = func_get_args();
$args = array_slice($args, 1);
foreach ($args as $callback) {
$return = phpQuery::callbackRun($callback, array($return));
}
return $return;
}
/**
* Return matched DOM nodes.
* jQuery difference.
*
* @param int $index
* @return array|string Returns string if $index != null
* @todo implement callbacks
* @todo return only arrays ?
* @todo maybe other name...
*/
public function getStrings($index = null, $callback1 = null, $callback2 = null, $callback3 = null) {
if ($index) {
$return = $this->eq($index)->text();
} else {
$return = array();
for ($i = 0; $i < $this->size(); $i++) {
$return[] = $this->eq($i)->text();
}
// pass thou callbacks
$args = func_get_args();
$args = array_slice($args, 1);
}
foreach ($args as $callback) {
if (is_array($return)) {
foreach ($return as $k => $v) {
$return[$k] = phpQuery::callbackRun($callback, array($v));
}
} else {
$return = phpQuery::callbackRun($callback, array($return));
}
}
return $return;
}
/**
* Returns new instance of actual class.
*
* @param array $newStack Optional. Will replace old stack with new and move old one to history.c
*/
public function newInstance($newStack = null) {
$class = get_class($this);
// support inheritance by passing old object to overloaded constructor
$new = $class != 'phpQuery'
? new $class($this, $this->getDocumentID())
: new phpQueryObject($this->getDocumentID());
$new->previous = $this;
if (is_null($newStack)) {
$new->elements = $this->elements;
if ($this->elementsBackup) {
$this->elements = $this->elementsBackup;
}
} else if (is_string($newStack)) {
$new->elements = phpQuery::pq($newStack, $this->getDocumentID())->stack();
} else {
$new->elements = $newStack;
}
return $new;
}
/**
* Enter description here...
*
* In the future, when PHP will support XLS 2.0, then we would do that this way:
* contains(tokenize(@class, '\s'), "something")
* @param unknown_type $class
* @param unknown_type $node
* @return boolean
* @access private
*/
protected function matchClasses($class, $node) {
// multi-class
if (mb_strpos($class, '.', 1)) {
$classes = explode('.', substr($class, 1));
$classesCount = count($classes);
$nodeClasses = explode(' ', $node->getAttribute('class'));
$nodeClassesCount = count($nodeClasses);
if ($classesCount > $nodeClassesCount) {
return false;
}
$diff = count(
array_diff(
$classes,
$nodeClasses
)
);
if (!$diff) {
return true;
}
// single-class
} else {
return in_array(
// strip leading dot from class name
substr($class, 1),
// get classes for element as array
explode(' ', $node->getAttribute('class'))
);
}
}
/**
* @access private
*/
protected function runQuery($XQuery, $selector = null, $compare = null) {
if ($compare && !method_exists($this, $compare)) {
return false;
}
$stack = array();
if (!$this->elements) {
$this->debug('Stack empty, skipping...');
}
// var_dump($this->elements[0]->nodeType);
// element, document
foreach ($this->stack(array(1, 9, 13)) as $k => $stackNode) {
$detachAfter = false;
// to work on detached nodes we need temporary place them somewhere
// thats because context xpath queries sucks ;]
$testNode = $stackNode;
while ($testNode) {
if (!$testNode->parentNode && !$this->isRoot($testNode)) {
$this->root->appendChild($testNode);
$detachAfter = $testNode;
break;
}
$testNode = isset($testNode->parentNode)
? $testNode->parentNode
: null;
}
// XXX tmp ?
$xpath = $this->documentWrapper->isXHTML
? $this->getNodeXpath($stackNode, 'html')
: $this->getNodeXpath($stackNode);
// FIXME pseudoclasses-only query, support XML
$query = $XQuery == '//' && $xpath == '/html[1]'
? '//*'
: $xpath . $XQuery;
$this->debug("XPATH: {$query}");
// run query, get elements
$nodes = $this->xpath->query($query);
$this->debug("QUERY FETCHED");
if (!$nodes->length) {
$this->debug('Nothing found');
}
$debug = array();
foreach ($nodes as $node) {
$matched = false;
if ($compare) {
phpQuery::$debug ?
$this->debug("Found: " . $this->whois($node) . ", comparing with {$compare}()")
: null;
$phpQueryDebug = phpQuery::$debug;
phpQuery::$debug = false;
// TODO ??? use phpQuery::callbackRun()
if (call_user_func_array(array($this, $compare), array($selector, $node))) {
$matched = true;
}
phpQuery::$debug = $phpQueryDebug;
} else {
$matched = true;
}
if ($matched) {
if (phpQuery::$debug) {
$debug[] = $this->whois($node);
}
$stack[] = $node;
}
}
if (phpQuery::$debug) {
$this->debug("Matched " . count($debug) . ": " . implode(', ', $debug));
}
if ($detachAfter) {
$this->root->removeChild($detachAfter);
}
}
$this->elements = $stack;
}
/**
* Enter description here...
*
* @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
*/
public function find($selectors, $context = null, $noHistory = false) {
if (!$noHistory) {
// backup last stack /for end()/
$this->elementsBackup = $this->elements;
}
// allow to define context
// TODO combine code below with phpQuery::pq() context guessing code
// as generic function
if ($context) {
if (!is_array($context) && $context instanceof DOMELEMENT) {
$this->elements = array($context);
} else if (is_array($context)) {
$this->elements = array();
foreach ($context as $c) {
if ($c instanceof DOMELEMENT) {
$this->elements[] = $c;
}
}
} else if ($context instanceof self) {
$this->elements = $context->elements;
}
}
$queries = $this->parseSelector($selectors);
$this->debug(array('FIND', $selectors, $queries));
$XQuery = '';
// remember stack state because of multi-queries
$oldStack = $this->elements;
// here we will be keeping found elements
$stack = array();
foreach ($queries as $selector) {
$this->elements = $oldStack;
$delimiterBefore = false;
foreach ($selector as $s) {
// TAG
$isTag = extension_loaded('mbstring') && phpQuery::$mbstringSupport
? mb_ereg_match('^[\w|\||-]+$', $s) || $s == '*'
: preg_match('@^[\w|\||-]+$@', $s) || $s == '*';
if ($isTag) {
if ($this->isXML()) {
// namespace support
if (mb_strpos($s, '|') !== false) {
$ns = $tag = null;
list($ns, $tag) = explode('|', $s);
$XQuery .= "$ns:$tag";
} else if ($s == '*') {
$XQuery .= "*";
} else {
$XQuery .= "*[local-name()='$s']";
}
} else {
$XQuery .= $s;
}
// ID
} else if ($s[0] == '#') {
if ($delimiterBefore) {
$XQuery .= '*';
}
$XQuery .= "[@id='" . substr($s, 1) . "']";
// ATTRIBUTES
} else if ($s[0] == '[') {
if ($delimiterBefore) {
$XQuery .= '*';
}
// strip side brackets
$attr = trim($s, '][');
$execute = false;
// attr with specifed value
if (mb_strpos($s, '=')) {
$value = null;
list($attr, $value) = explode('=', $attr);
$value = trim($value, "'\"");
if ($this->isRegexp($attr)) {
// cut regexp character
$attr = substr($attr, 0, -1);
$execute = true;
$XQuery .= "[@{$attr}]";
} else {
$XQuery .= "[@{$attr}='{$value}']";
}
// attr without specified value
} else {
$XQuery .= "[@{$attr}]";
}
if ($execute) {
$this->runQuery($XQuery, $s, 'is');
$XQuery = '';
if (!$this->length()) {
break;
}
}
// CLASSES
} else if ($s[0] == '.') {
// TODO use return $this->find("./self::*[contains(concat(\" \",@class,\" \"), \" $class \")]");
// thx wizDom ;)
if ($delimiterBefore) {
$XQuery .= '*';
}
$XQuery .= '[@class]';
$this->runQuery($XQuery, $s, 'matchClasses');
$XQuery = '';
if (!$this->length()) {
break;
}
// ~ General Sibling Selector
} else if ($s[0] == '~') {
$this->runQuery($XQuery);
$XQuery = '';
$this->elements = $this
->siblings(
substr($s, 1)
)->elements;
if (!$this->length()) {
break;
}
// + Adjacent sibling selectors
} else if ($s[0] == '+') {
// TODO /following-sibling::
$this->runQuery($XQuery);
$XQuery = '';
$subSelector = substr($s, 1);
$subElements = $this->elements;
$this->elements = array();
foreach ($subElements as $node) {
// search first DOMElement sibling
$test = $node->nextSibling;
while ($test && !($test instanceof DOMELEMENT)) {
$test = $test->nextSibling;
}
if ($test && $this->is($subSelector, $test)) {
$this->elements[] = $test;
}
}
if (!$this->length()) {
break;
}
// PSEUDO CLASSES
} else if ($s[0] == ':') {
// TODO optimization for :first :last
if ($XQuery) {
$this->runQuery($XQuery);
$XQuery = '';
}
if (!$this->length()) {
break;
}
$this->pseudoClasses($s);
if (!$this->length()) {
break;
}
// DIRECT DESCENDANDS
} else if ($s == '>') {
$XQuery .= '/';
$delimiterBefore = 2;
// ALL DESCENDANDS
} else if ($s == ' ') {
$XQuery .= '//';
$delimiterBefore = 2;
// ERRORS
} else {
phpQuery::debug("Unrecognized token '$s'");
}
$delimiterBefore = $delimiterBefore === 2;
}
// run query if any
if ($XQuery && $XQuery != '//') {
$this->runQuery($XQuery);
$XQuery = '';
}
foreach ($this->elements as $node) {
if (!$this->elementsContainsNode($node, $stack)) {
$stack[] = $node;
}
}
}
$this->elements = $stack;
return $this->newInstance();
}
/**
* @todo create API for classes with pseudoselectors
* @access private
*/
protected function pseudoClasses($class) {
// TODO clean args parsing ?
$class = ltrim($class, ':');
$haveArgs = mb_strpos($class, '(');
if ($haveArgs !== false) {
$args = substr($class, $haveArgs + 1, -1);
$class = substr($class, 0, $haveArgs);
}
switch ($class) {
case 'even':
case 'odd':
$stack = array();
foreach ($this->elements as $i => $node) {
if ($class == 'even' && ($i % 2) == 0) {
$stack[] = $node;
} else if ($class == 'odd' && $i % 2) {
$stack[] = $node;
}
}
$this->elements = $stack;
break;
case 'eq':
$k = intval($args);
$this->elements = isset($this->elements[$k])
? array($this->elements[$k])
: array();
break;
case 'gt':
$this->elements = array_slice($this->elements, $args + 1);
break;
case 'lt':
$this->elements = array_slice($this->elements, 0, $args + 1);
break;
case 'first':
if (isset($this->elements[0])) {
$this->elements = array($this->elements[0]);
}
break;
case 'last':
if ($this->elements) {
$this->elements = array($this->elements[count($this->elements) - 1]);
}
break;
/*case 'parent':
$stack = array();
foreach($this->elements as $node) {
if ( $node->childNodes->length )
$stack[] = $node;
}
$this->elements = $stack;
break;*/
case 'contains':
$text = trim($args, "\"'");
$stack = array();
foreach ($this->elements as $node) {
if (($text) && (mb_stripos($node->textContent, $text) === false))
continue;
}
$stack[] = $node;
}
$this->elements = $stack;
break;
case 'not':
$selector = self::unQuote($args);
$this->elements = $this->not($selector)->stack();
break;
case 'slice':
// TODO jQuery difference ?
$args = explode(',',
str_replace(', ', ',', trim($args, "\"'"))
);
$start = $args[0];
$end = isset($args[1])