228 lines
5.7 KiB
PHP
228 lines
5.7 KiB
PHP
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<?php
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/*
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* This file is part of Twig.
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*
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* (c) 2009 Fabien Potencier
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* (c) 2009 Armin Ronacher
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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/**
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* Represents a node in the AST.
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*
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* @package twig
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* @author Fabien Potencier <fabien@symfony.com>
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*/
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class Twig_Node implements Twig_NodeInterface, Countable, IteratorAggregate
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{
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protected $nodes;
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protected $attributes;
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protected $lineno;
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protected $tag;
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/**
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* Constructor.
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*
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* The nodes are automatically made available as properties ($this->node).
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* The attributes are automatically made available as array items ($this['name']).
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*
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* @param array $nodes An array of named nodes
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* @param array $attributes An array of attributes (should not be nodes)
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* @param integer $lineno The line number
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* @param string $tag The tag name associated with the Node
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*/
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public function __construct(array $nodes = array(), array $attributes = array(), $lineno = 0, $tag = null)
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{
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$this->nodes = $nodes;
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$this->attributes = $attributes;
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$this->lineno = $lineno;
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$this->tag = $tag;
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}
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public function __toString()
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{
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$attributes = array();
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foreach ($this->attributes as $name => $value) {
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$attributes[] = sprintf('%s: %s', $name, str_replace("\n", '', var_export($value, true)));
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}
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$repr = array(get_class($this).'('.implode(', ', $attributes));
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if (count($this->nodes)) {
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foreach ($this->nodes as $name => $node) {
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$len = strlen($name) + 4;
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$noderepr = array();
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foreach (explode("\n", (string) $node) as $line) {
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$noderepr[] = str_repeat(' ', $len).$line;
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}
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$repr[] = sprintf(' %s: %s', $name, ltrim(implode("\n", $noderepr)));
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}
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$repr[] = ')';
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} else {
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$repr[0] .= ')';
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}
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return implode("\n", $repr);
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}
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public function toXml($asDom = false)
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{
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$dom = new DOMDocument('1.0', 'UTF-8');
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$dom->formatOutput = true;
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$dom->appendChild($xml = $dom->createElement('twig'));
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$xml->appendChild($node = $dom->createElement('node'));
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$node->setAttribute('class', get_class($this));
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foreach ($this->attributes as $name => $value) {
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$node->appendChild($attribute = $dom->createElement('attribute'));
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$attribute->setAttribute('name', $name);
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$attribute->appendChild($dom->createTextNode($value));
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}
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foreach ($this->nodes as $name => $n) {
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if (null === $n) {
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continue;
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}
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$child = $n->toXml(true)->getElementsByTagName('node')->item(0);
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$child = $dom->importNode($child, true);
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$child->setAttribute('name', $name);
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$node->appendChild($child);
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}
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return $asDom ? $dom : $dom->saveXml();
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}
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public function compile(Twig_Compiler $compiler)
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{
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foreach ($this->nodes as $node) {
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$node->compile($compiler);
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}
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}
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public function getLine()
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{
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return $this->lineno;
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}
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public function getNodeTag()
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{
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return $this->tag;
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}
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/**
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* Returns true if the attribute is defined.
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*
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* @param string The attribute name
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*
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* @return Boolean true if the attribute is defined, false otherwise
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*/
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public function hasAttribute($name)
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{
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return array_key_exists($name, $this->attributes);
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}
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/**
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* Gets an attribute.
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*
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* @param string The attribute name
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*
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* @return mixed The attribute value
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*/
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public function getAttribute($name)
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{
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if (!array_key_exists($name, $this->attributes)) {
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throw new Twig_Error_Runtime(sprintf('Attribute "%s" does not exist for Node "%s".', $name, get_class($this)));
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}
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return $this->attributes[$name];
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}
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/**
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* Sets an attribute.
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*
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* @param string The attribute name
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* @param mixed The attribute value
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*/
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public function setAttribute($name, $value)
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{
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$this->attributes[$name] = $value;
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}
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/**
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* Removes an attribute.
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*
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* @param string The attribute name
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*/
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public function removeAttribute($name)
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{
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unset($this->attributes[$name]);
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}
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/**
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* Returns true if the node with the given identifier exists.
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*
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* @param string The node name
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*
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* @return Boolean true if the node with the given name exists, false otherwise
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*/
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public function hasNode($name)
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{
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return array_key_exists($name, $this->nodes);
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}
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/**
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* Gets a node by name.
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*
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* @param string The node name
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*
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* @return Twig_Node A Twig_Node instance
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*/
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public function getNode($name)
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{
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if (!array_key_exists($name, $this->nodes)) {
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throw new Twig_Error_Runtime(sprintf('Node "%s" does not exist for Node "%s".', $name, get_class($this)));
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}
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return $this->nodes[$name];
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}
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/**
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* Sets a node.
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*
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* @param string The node name
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* @param Twig_Node A Twig_Node instance
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*/
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public function setNode($name, $node = null)
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{
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$this->nodes[$name] = $node;
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}
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/**
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* Removes a node by name.
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*
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* @param string The node name
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*/
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public function removeNode($name)
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{
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unset($this->nodes[$name]);
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}
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public function count()
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{
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return count($this->nodes);
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}
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public function getIterator()
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{
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return new ArrayIterator($this->nodes);
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}
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}
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