AsseticNode.php
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<?php
/*
* This file is part of the Assetic package, an OpenSky project.
*
* (c) 2010-2014 OpenSky Project Inc
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Assetic\Extension\Twig;
use Assetic\Asset\AssetInterface;
class AsseticNode extends \Twig_Node
{
/**
* Constructor.
*
* Available attributes:
*
* * debug: The debug mode
* * combine: Whether to combine assets
* * var_name: The name of the variable to expose to the body node
*
* @param AssetInterface $asset The asset
* @param \Twig_NodeInterface $body The body node
* @param array $inputs An array of input strings
* @param array $filters An array of filter strings
* @param string $name The name of the asset
* @param array $attributes An array of attributes
* @param integer $lineno The line number
* @param string $tag The tag name
*/
public function __construct(AssetInterface $asset, \Twig_NodeInterface $body, array $inputs, array $filters, $name, array $attributes = array(), $lineno = 0, $tag = null)
{
$nodes = array('body' => $body);
$attributes = array_replace(
array('debug' => null, 'combine' => null, 'var_name' => 'asset_url'),
$attributes,
array('asset' => $asset, 'inputs' => $inputs, 'filters' => $filters, 'name' => $name)
);
parent::__construct($nodes, $attributes, $lineno, $tag);
}
public function compile(\Twig_Compiler $compiler)
{
$compiler->addDebugInfo($this);
$combine = $this->getAttribute('combine');
$debug = $this->getAttribute('debug');
if (null === $combine && null !== $debug) {
$combine = !$debug;
}
if (null === $combine) {
$compiler
->write("if (isset(\$context['assetic']['debug']) && \$context['assetic']['debug']) {\n")
->indent()
;
$this->compileDebug($compiler);
$compiler
->outdent()
->write("} else {\n")
->indent()
;
$this->compileAsset($compiler, $this->getAttribute('asset'), $this->getAttribute('name'));
$compiler
->outdent()
->write("}\n")
;
} elseif ($combine) {
$this->compileAsset($compiler, $this->getAttribute('asset'), $this->getAttribute('name'));
} else {
$this->compileDebug($compiler);
}
$compiler
->write('unset($context[')
->repr($this->getAttribute('var_name'))
->raw("]);\n")
;
}
protected function compileDebug(\Twig_Compiler $compiler)
{
$i = 0;
foreach ($this->getAttribute('asset') as $leaf) {
$leafName = $this->getAttribute('name').'_'.$i++;
$this->compileAsset($compiler, $leaf, $leafName);
}
}
protected function compileAsset(\Twig_Compiler $compiler, AssetInterface $asset, $name)
{
if ($vars = $asset->getVars()) {
$compiler->write("// check variable conditions\n");
foreach ($vars as $var) {
$compiler
->write("if (!isset(\$context['assetic']['vars']['$var'])) {\n")
->indent()
->write("throw new \RuntimeException(sprintf('The asset \"".$name."\" expected variable \"".$var."\" to be set, but got only these vars: %s. Did you set-up a value supplier?', isset(\$context['assetic']['vars']) && \$context['assetic']['vars'] ? implode(', ', \$context['assetic']['vars']) : '# none #'));\n")
->outdent()
->write("}\n")
;
}
$compiler->raw("\n");
}
$compiler
->write("// asset \"$name\"\n")
->write('$context[')
->repr($this->getAttribute('var_name'))
->raw('] = ')
;
$this->compileAssetUrl($compiler, $asset, $name);
$compiler
->raw(";\n")
->subcompile($this->getNode('body'))
;
}
protected function compileAssetUrl(\Twig_Compiler $compiler, AssetInterface $asset, $name)
{
if (!$vars = $asset->getVars()) {
$compiler->repr($asset->getTargetPath());
return;
}
$compiler
->raw("strtr(")
->string($asset->getTargetPath())
->raw(", array(");
;
$first = true;
foreach ($vars as $var) {
if (!$first) {
$compiler->raw(", ");
}
$first = false;
$compiler
->string("{".$var."}")
->raw(" => \$context['assetic']['vars']['$var']")
;
}
$compiler
->raw("))")
;
}
}