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