<?php

/*

 * This file is part of Twig.

 *

 * (c) 2009 Fabien Potencier

 *

 * For the full copyright and license information, please view the LICENSE

 * file that was distributed with this source code.

 */

/**

 * Defines a macro.

 *

 * <pre>

 * {% macro input(name, value, type, size) %}

 *    <input type="{{ type|default('text') }}" name="{{ name }}" value="{{ value|e }}" size="{{ size|default(20) }}" />

 * {% endmacro %}

 * </pre>

 */

class Twig_TokenParser_Macro extends Twig_TokenParser

{

    /**

     * Parses a token and returns a node.

     *

     * @param Twig_Token $token A Twig_Token instance

     *

     * @return Twig_NodeInterface A Twig_NodeInterface instance

     */

    public function parse(Twig_Token $token)

    {

        $lineno = $token->getLine();

        $name = $this->parser->getStream()->expect(Twig_Token::NAME_TYPE)->getValue();

        $arguments = $this->parser->getExpressionParser()->parseArguments();

        $this->parser->getStream()->expect(Twig_Token::BLOCK_END_TYPE);

        $this->parser->pushLocalScope();

        $body = $this->parser->subparse(array($this, 'decideBlockEnd'), true);

        if ($this->parser->getStream()->test(Twig_Token::NAME_TYPE)) {

            $value = $this->parser->getStream()->next()->getValue();

            if ($value != $name) {

                throw new Twig_Error_Syntax(sprintf("Expected endmacro for macro '$name' (but %s given)", $value), $lineno);

            }

        }

        $this->parser->popLocalScope();

        $this->parser->getStream()->expect(Twig_Token::BLOCK_END_TYPE);

        $this->parser->setMacro($name, new Twig_Node_Macro($name, $body, $arguments, $lineno, $this->getTag()));

        return null;

    }

    public function decideBlockEnd(Twig_Token $token)

    {

        return $token->test('endmacro');

    }

    /**

     * Gets the tag name associated with this token parser.

     *

     * @param string The tag name

     */

    public function getTag()

    {

        return 'macro';

    }

}