Source of file LessFilter.php
Size: 5,038 Bytes - Last Modified: 2013-06-02T00:13:43+02:00
/home/theseer/Downloads/Symfony/vendor/kriswallsmith/assetic/src/Assetic/Filter/LessFilter.php
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207 | <?php /* * This file is part of the Assetic package, an OpenSky project. * * (c) 2010-2013 OpenSky Project Inc * * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. */ namespace Assetic\Filter; use Assetic\Asset\AssetInterface; use Assetic\Exception\FilterException; use Assetic\Factory\AssetFactory; use Assetic\Util\LessUtils; /** * Loads LESS files. * * @link http://lesscss.org/ * @author Kris Wallsmith <kris.wallsmith@gmail.com> */ class LessFilter extends BaseNodeFilter implements DependencyExtractorInterface { private $nodeBin; /** * @var array */ private $treeOptions; /** * @var array */ private $parserOptions; /** * Load Paths * * A list of paths which less will search for includes. * * @var array */ protected $loadPaths = array(); /** * Constructor. * * @param string $nodeBin The path to the node binary * @param array $nodePaths An array of node paths */ public function __construct($nodeBin = '/usr/bin/node', array $nodePaths = array()) { $this->nodeBin = $nodeBin; $this->setNodePaths($nodePaths); $this->treeOptions = array(); $this->parserOptions = array(); } /** * @param bool $compress */ public function setCompress($compress) { $this->addTreeOption('compress', $compress); } public function setLoadPaths(array $loadPaths) { $this->loadPaths = $loadPaths; } /** * Adds a path where less will search for includes * * @param string $path Load path (absolute) */ public function addLoadPath($path) { $this->loadPaths[] = $path; } /** * @param string $code * @param string $value */ public function addTreeOption($code, $value) { $this->treeOptions[$code] = $value; } /** * @param string $code * @param string $value */ public function addParserOption($code, $value) { $this->parserOptions[$code] = $value; } public function filterLoad(AssetInterface $asset) { static $format = <<<'EOF' var less = require('less'); var sys = require(process.binding('natives').util ? 'util' : 'sys'); new(less.Parser)(%s).parse(%s, function(e, tree) { if (e) { less.writeError(e); process.exit(2); } try { sys.print(tree.toCSS(%s)); } catch (e) { less.writeError(e); process.exit(3); } }); EOF; $root = $asset->getSourceRoot(); $path = $asset->getSourcePath(); // parser options $parserOptions = $this->parserOptions; if ($root && $path) { $parserOptions['paths'] = array(dirname($root.'/'.$path)); $parserOptions['filename'] = basename($path); } foreach ($this->loadPaths as $loadPath) { $parserOptions['paths'][] = $loadPath; } $pb = $this->createProcessBuilder(); $pb->add($this->nodeBin)->add($input = tempnam(sys_get_temp_dir(), 'assetic_less')); file_put_contents($input, sprintf($format, json_encode($parserOptions), json_encode($asset->getContent()), json_encode($this->treeOptions) )); $proc = $pb->getProcess(); $code = $proc->run(); unlink($input); if (0 !== $code) { throw FilterException::fromProcess($proc)->setInput($asset->getContent()); } $asset->setContent($proc->getOutput()); } public function filterDump(AssetInterface $asset) { } /** * @todo support for @import-once * @todo support for @import (less) "lib.css" */ public function getChildren(AssetFactory $factory, $content, $loadPath = null) { $loadPaths = $this->loadPaths; if (null !== $loadPath) { $loadPaths[] = $loadPath; } if (empty($loadPaths)) { return array(); } $children = array(); foreach (LessUtils::extractImports($content) as $reference) { if ('.css' === substr($reference, -4)) { // skip normal css imports // todo: skip imports with media queries continue; } if ('.less' !== substr($reference, -5)) { $reference .= '.less'; } foreach ($loadPaths as $loadPath) { if (file_exists($file = $loadPath.'/'.$reference)) { $coll = $factory->createAsset($file, array(), array('root' => $loadPath)); foreach ($coll as $leaf) { $leaf->ensureFilter($this); $children[] = $leaf; goto next_reference; } } } next_reference: } return $children; } } |