147 lines
4.2 KiB
PHP
147 lines
4.2 KiB
PHP
<?php
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/**
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* Piwik - Open source web analytics
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*
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* @link http://piwik.org
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* @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
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*
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*/
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namespace Piwik\AssetManager\UIAssetMerger;
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use Exception;
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use Piwik\AssetManager\UIAsset;
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use Piwik\AssetManager\UIAssetMerger;
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use Piwik\Piwik;
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use lessc;
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class StylesheetUIAssetMerger extends UIAssetMerger
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{
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/**
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* @var lessc
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*/
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private $lessCompiler;
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function __construct($mergedAsset, $assetFetcher, $cacheBuster)
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{
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parent::__construct($mergedAsset, $assetFetcher, $cacheBuster);
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$this->lessCompiler = self::getLessCompiler();
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}
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protected function getMergedAssets()
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{
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foreach($this->getAssetCatalog()->getAssets() as $uiAsset) {
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$content = $uiAsset->getContent();
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if (false !== strpos($content, '@import')) {
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$this->lessCompiler->addImportDir(dirname($uiAsset->getAbsoluteLocation()));
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}
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}
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return $this->lessCompiler->compile($this->getConcatenatedAssets());
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}
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/**
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* @return lessc
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* @throws Exception
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*/
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private static function getLessCompiler()
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{
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if (!class_exists("lessc")) {
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throw new Exception("Less was added to composer during 2.0. ==> Execute this command to update composer packages: \$ php composer.phar install");
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}
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$less = new lessc();
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return $less;
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}
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protected function generateCacheBuster()
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{
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$fileHash = $this->cacheBuster->md5BasedCacheBuster($this->getConcatenatedAssets());
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return "/* compile_me_once=$fileHash */";
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}
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protected function getPreamble()
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{
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return $this->getCacheBusterValue() . "\n"
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. "/* Piwik CSS file is compiled with Less. You may be interested in writing a custom Theme for Piwik! */\n";
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}
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protected function postEvent(&$mergedContent)
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{
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/**
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* Triggered after all less stylesheets are compiled to CSS, minified and merged into
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* one file, but before the generated CSS is written to disk.
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*
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* This event can be used to modify merged CSS.
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*
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* @param string $mergedContent The merged and minified CSS.
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*/
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Piwik::postEvent('AssetManager.filterMergedStylesheets', array(&$mergedContent));
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}
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public function getFileSeparator()
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{
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return '';
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}
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protected function processFileContent($uiAsset)
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{
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return $this->rewriteCssPathsDirectives($uiAsset);
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}
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/**
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* Rewrite css url directives
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* - rewrites paths defined relatively to their css/less definition file
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* - rewrite windows directory separator \\ to /
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*
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* @param UIAsset $uiAsset
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* @return string
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*/
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private function rewriteCssPathsDirectives($uiAsset)
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{
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static $rootDirectoryLength = null;
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if (is_null($rootDirectoryLength)) {
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$rootDirectoryLength = self::countDirectoriesInPathToRoot($uiAsset);
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}
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$baseDirectory = dirname($uiAsset->getRelativeLocation());
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$content = preg_replace_callback(
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"/(url\(['\"]?)([^'\")]*)/",
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function ($matches) use ($rootDirectoryLength, $baseDirectory) {
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$absolutePath = realpath(PIWIK_USER_PATH . "/$baseDirectory/" . $matches[2]);
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if($absolutePath) {
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$relativePath = substr($absolutePath, $rootDirectoryLength);
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$relativePath = str_replace('\\', '/', $relativePath);
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return $matches[1] . $relativePath;
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} else {
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return $matches[1] . $matches[2];
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}
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},
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$uiAsset->getContent()
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);
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return $content;
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}
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/**
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* @param UIAsset $uiAsset
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* @return int
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*/
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protected function countDirectoriesInPathToRoot($uiAsset)
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{
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$rootDirectory = realpath($uiAsset->getBaseDirectory());
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if ($rootDirectory != PATH_SEPARATOR
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&& substr_compare($rootDirectory, PATH_SEPARATOR, -1)) {
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$rootDirectory .= PATH_SEPARATOR;
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}
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$rootDirectoryLen = strlen($rootDirectory);
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return $rootDirectoryLen;
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}
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}
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