Просмотр архива Портфолио HELLSTYLE


<?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 module node.
 *
 * @author Fabien Potencier <fabien@symfony.com>
 */
class Twig_Node_Module extends Twig_Node
{
    public function __construct(Twig_NodeInterface $body, Twig_Node_Expression $parent = null, Twig_NodeInterface $blocks, Twig_NodeInterface $macros, Twig_NodeInterface $traits, $embeddedTemplates, $filename)
    {
        // embedded templates are set as attributes so that they are only visited once by the visitors
        parent::__construct(array('parent' => $parent, 'body' => $body, 'blocks' => $blocks, 'macros' => $macros, 'traits' => $traits), array('filename' => $filename, 'index' => null, 'embedded_templates' => $embeddedTemplates), 1);
    }

    public function setIndex($index)
    {
        $this->setAttribute('index', $index);
    }

    /**
     * Compiles the node to PHP.
     *
     * @param Twig_Compiler A Twig_Compiler instance
     */
    public function compile(Twig_Compiler $compiler)
    {
        $this->compileTemplate($compiler);

        foreach ($this->getAttribute('embedded_templates') as $template) {
            $compiler->subcompile($template);
        }
    }

    protected function compileTemplate(Twig_Compiler $compiler)
    {
        if (!$this->getAttribute('index')) {
            $compiler->write('<?php');
        }

        $this->compileClassHeader($compiler);

        if (count($this->getNode('blocks')) || count($this->getNode('traits')) || null === $this->getNode('parent') || $this->getNode('parent') instanceof Twig_Node_Expression_Constant) {
            $this->compileConstructor($compiler);
        }

        $this->compileGetParent($compiler);

        $this->compileDisplayHeader($compiler);

        $this->compileDisplayBody($compiler);

        $this->compileDisplayFooter($compiler);

        $compiler->subcompile($this->getNode('blocks'));

        $this->compileMacros($compiler);

        $this->compileGetTemplateName($compiler);

        $this->compileIsTraitable($compiler);

        $this->compileDebugInfo($compiler);

        $this->compileClassFooter($compiler);
    }

    protected function compileGetParent(Twig_Compiler $compiler)
    {
        if (null === $this->getNode('parent')) {
            return;
        }

        $compiler
            ->write("protected function doGetParent(array $context)n", "{n")
            ->indent()
            ->write("return ")
        ;

        if ($this->getNode('parent') instanceof Twig_Node_Expression_Constant) {
            $compiler->subcompile($this->getNode('parent'));
        } else {
            $compiler
                ->raw("$this->env->resolveTemplate(")
                ->subcompile($this->getNode('parent'))
                ->raw(")")
            ;
        }

        $compiler
            ->raw(";n")
            ->outdent()
            ->write("}nn")
        ;
    }

    protected function compileDisplayBody(Twig_Compiler $compiler)
    {
        $compiler->subcompile($this->getNode('body'));

        if (null !== $this->getNode('parent')) {
            if ($this->getNode('parent') instanceof Twig_Node_Expression_Constant) {
                $compiler->write("$this->parent");
            } else {
                $compiler->write("$this->getParent($context)");
            }
            $compiler->raw("->display($context, array_merge($this->blocks, $blocks));n");
        }
    }

    protected function compileClassHeader(Twig_Compiler $compiler)
    {
        $compiler
            ->write("nn")
            // if the filename contains */, add a blank to avoid a PHP parse error
            ->write("/* ".str_replace('*/', '* /', $this->getAttribute('filename'))." */n")
            ->write('class '.$compiler->getEnvironment()->getTemplateClass($this->getAttribute('filename'), $this->getAttribute('index')))
            ->raw(sprintf(" extends %sn", $compiler->getEnvironment()->getBaseTemplateClass()))
            ->write("{n")
            ->indent()
        ;
    }

    protected function compileConstructor(Twig_Compiler $compiler)
    {
        $compiler
            ->write("public function __construct(Twig_Environment $env)n", "{n")
            ->indent()
            ->write("parent::__construct($env);nn")
        ;

        // parent
        if (null === $this->getNode('parent')) {
            $compiler->write("$this->parent = false;nn");
        } elseif ($this->getNode('parent') instanceof Twig_Node_Expression_Constant) {
            $compiler
                ->write("$this->parent = $this->env->loadTemplate(")
                ->subcompile($this->getNode('parent'))
                ->raw(");nn")
            ;
        }

        $countTraits = count($this->getNode('traits'));
        if ($countTraits) {
            // traits
            foreach ($this->getNode('traits') as $i => $trait) {
                $this->compileLoadTemplate($compiler, $trait->getNode('template'), sprintf('$_trait_%s', $i));

                $compiler
                    ->addDebugInfo($trait->getNode('template'))
                    ->write(sprintf("if (!$_trait_%s->isTraitable()) {n", $i))
                    ->indent()
                    ->write("throw new Twig_Error_Runtime('Template "'.")
                    ->subcompile($trait->getNode('template'))
                    ->raw(".'" cannot be used as a trait.');n")
                    ->outdent()
                    ->write("}n")
                    ->write(sprintf("$_trait_%s_blocks = $_trait_%s->getBlocks();nn", $i, $i))
                ;

                foreach ($trait->getNode('targets') as $key => $value) {
                    $compiler
                        ->write(sprintf("if (!isset($_trait_%s_blocks[", $i))
                        ->string($key)
                        ->raw("])) {n")
                        ->indent()
                        ->write("throw new Twig_Error_Runtime(sprintf('Block ")
                        ->string($key)
                        ->raw(" is not defined in trait ")
                        ->subcompile($trait->getNode('template'))
                        ->raw(".'));n")
                        ->outdent()
                        ->write("}nn")

                        ->write(sprintf("$_trait_%s_blocks[", $i))
                        ->subcompile($value)
                        ->raw(sprintf("] = $_trait_%s_blocks[", $i))
                        ->string($key)
                        ->raw(sprintf("]; unset($_trait_%s_blocks[", $i))
                        ->string($key)
                        ->raw("]);nn")
                    ;
                }
            }

            if ($countTraits > 1) {
                $compiler
                    ->write("$this->traits = array_merge(n")
                    ->indent()
                ;

                for ($i = 0; $i < $countTraits; $i++) {
                    $compiler
                        ->write(sprintf("$_trait_%s_blocks".($i == $countTraits - 1 ? '' : ',')."n", $i))
                    ;
                }

                $compiler
                    ->outdent()
                    ->write(");nn")
                ;
            } else {
                $compiler
                    ->write("$this->traits = $_trait_0_blocks;nn")
                ;
            }

            $compiler
                ->write("$this->blocks = array_merge(n")
                ->indent()
                ->write("$this->traits,n")
                ->write("array(n")
            ;
        } else {
            $compiler
                ->write("$this->blocks = array(n")
            ;
        }

        // blocks
        $compiler
            ->indent()
        ;

        foreach ($this->getNode('blocks') as $name => $node) {
            $compiler
                ->write(sprintf("'%s' => array($this, 'block_%s'),n", $name, $name))
            ;
        }

        if ($countTraits) {
            $compiler
                ->outdent()
                ->write(")n")
            ;
        }

        $compiler
            ->outdent()
            ->write(");n")
            ->outdent()
            ->write("}nn");
        ;
    }

    protected function compileDisplayHeader(Twig_Compiler $compiler)
    {
        $compiler
            ->write("protected function doDisplay(array $context, array $blocks = array())n", "{n")
            ->indent()
        ;
    }

    protected function compileDisplayFooter(Twig_Compiler $compiler)
    {
        $compiler
            ->outdent()
            ->write("}nn")
        ;
    }

    protected function compileClassFooter(Twig_Compiler $compiler)
    {
        $compiler
            ->outdent()
            ->write("}n")
        ;
    }

    protected function compileMacros(Twig_Compiler $compiler)
    {
        $compiler->subcompile($this->getNode('macros'));
    }

    protected function compileGetTemplateName(Twig_Compiler $compiler)
    {
        $compiler
            ->write("public function getTemplateName()n", "{n")
            ->indent()
            ->write('return ')
            ->repr($this->getAttribute('filename'))
            ->raw(";n")
            ->outdent()
            ->write("}nn")
        ;
    }

    protected function compileIsTraitable(Twig_Compiler $compiler)
    {
        // A template can be used as a trait if:
        //   * it has no parent
        //   * it has no macros
        //   * it has no body
        //
        // Put another way, a template can be used as a trait if it
        // only contains blocks and use statements.
        $traitable = null === $this->getNode('parent') && 0 === count($this->getNode('macros'));
        if ($traitable) {
            if ($this->getNode('body') instanceof Twig_Node_Body) {
                $nodes = $this->getNode('body')->getNode(0);
            } else {
                $nodes = $this->getNode('body');
            }

            if (!count($nodes)) {
                $nodes = new Twig_Node(array($nodes));
            }

            foreach ($nodes as $node) {
                if (!count($node)) {
                    continue;
                }

                if ($node instanceof Twig_Node_Text && ctype_space($node->getAttribute('data'))) {
                    continue;
                }

                if ($node instanceof Twig_Node_BlockReference) {
                    continue;
                }

                $traitable = false;
                break;
            }
        }

        if ($traitable) {
            return;
        }

        $compiler
            ->write("public function isTraitable()n", "{n")
            ->indent()
            ->write(sprintf("return %s;n", $traitable ? 'true' : 'false'))
            ->outdent()
            ->write("}nn")
        ;
    }

    protected function compileDebugInfo(Twig_Compiler $compiler)
    {
        $compiler
            ->write("public function getDebugInfo()n", "{n")
            ->indent()
            ->write(sprintf("return %s;n", str_replace("n", '', var_export(array_reverse($compiler->getDebugInfo(), true), true))))
            ->outdent()
            ->write("}n")
        ;
    }

    protected function compileLoadTemplate(Twig_Compiler $compiler, $node, $var)
    {
        if ($node instanceof Twig_Node_Expression_Constant) {
            $compiler
                ->write(sprintf("%s = $this->env->loadTemplate(", $var))
                ->subcompile($node)
                ->raw(");n")
            ;
        } else {
            $compiler
                ->write(sprintf("%s = ", $var))
                ->subcompile($node)
                ->raw(";n")
                ->write(sprintf("if (!%s", $var))
                ->raw(" instanceof Twig_Template) {n")
                ->indent()
                ->write(sprintf("%s = $this->env->loadTemplate(%s);n", $var, $var))
                ->outdent()
                ->write("}n")
            ;
        }
    }
}