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<?php // This file is part of Moodle - http://moodle.org/ // // Moodle is free software: you can redistribute it and/or modify // it under the terms of the GNU General Public License as published by // the Free Software Foundation, either version 3 of the License, or // (at your option) any later version. // // Moodle is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // // You should have received a copy of the GNU General Public License // along with Moodle. If not, see <http://www.gnu.org/licenses/>. /** * Moodle implementation of SCSS. * * @package core * @copyright 2016 Frédéric Massart * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later */ defined('MOODLE_INTERNAL') || die(); /** * Moodle SCSS compiler class. * * @package core * @copyright 2016 Frédéric Massart * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later */ class core_scss extends \Leafo\ScssPhp\Compiler { /** @var string The path to the SCSS file. */ protected $scssfile; /** @var array Bits of SCSS content to prepend. */ protected $scssprepend = array(); /** @var array Bits of SCSS content. */ protected $scsscontent = array(); /** * Add variables. * * @param array $scss Associative array of variables and their values. * @return void */ public function add_variables(array $variables) { $this->setVariables($variables); } /** * Append raw SCSS to what's to compile. * * @param string $scss SCSS code. * @return void */ public function append_raw_scss($scss) { $this->scsscontent[] = $scss; } /** * Prepend raw SCSS to what's to compile. * * @param string $scss SCSS code. * @return void */ public function prepend_raw_scss($scss) { $this->scssprepend[] = $scss; } /** * Set the file to compile from. * * The purpose of this method is to provide a way to import the * content of a file without messing with the import directories. * * @param string $filepath The path to the file. * @return void */ public function set_file($filepath) { $this->scssfile = $filepath; $this->setImportPaths([dirname($filepath)]); } /** * Compiles to CSS. * * @return string */ public function to_css() { $content = implode(';', $this->scssprepend); if (!empty($this->scssfile)) { $content .= file_get_contents($this->scssfile); } $content .= implode(';', $this->scsscontent); return $this->compile($content); } /** * Compile scss. * * Overrides ScssPHP's implementation, using the SassC compiler if it is available. * * @param string $code SCSS to compile. * @param string $path Path to SCSS to compile. * * @return string The compiled CSS. */ public function compile($code, $path = null) { global $CFG; $pathtosassc = trim($CFG->pathtosassc ?? ''); if (!empty($pathtosassc) && is_executable($pathtosassc) && !is_dir($pathtosassc)) { $process = proc_open( $pathtosassc . ' -I' . implode(':', $this->importPaths) . ' -s', [ ['pipe', 'r'], // Set the process stdin pipe to read mode. ['pipe', 'w'], // Set the process stdout pipe to write mode. ['pipe', 'w'] // Set the process stderr pipe to write mode. ], $pipes // Pipes become available in $pipes (pass by reference). ); if (is_resource($process)) { fwrite($pipes[0], $code); // Write the raw scss to the sassc process stdin. fclose($pipes[0]); $stdout = stream_get_contents($pipes[1]); $stderr = stream_get_contents($pipes[2]); fclose($pipes[1]); fclose($pipes[2]); // The proc_close function returns the process exit status. Anything other than 0 is bad. if (proc_close($process) !== 0) { throw new coding_exception($stderr); } // Compiled CSS code will be available from stdout. return $stdout; } } return parent::compile($code, $path); } /** * Compile child; returns a value to halt execution * * @param array $child * @param \Leafo\ScssPhp\Formatter\OutputBlock $out * * @return array|null */ protected function compileChild($child, \Leafo\ScssPhp\Formatter\OutputBlock $out) { switch($child[0]) { case \Leafo\ScssPhp\Type::T_SCSSPHP_IMPORT_ONCE: case \Leafo\ScssPhp\Type::T_IMPORT: list(, $rawpath) = $child; $rawpath = $this->reduce($rawpath); $path = $this->compileStringContent($rawpath); if ($path = $this->findImport($path)) { if ($this->is_valid_file($path)) { return parent::compileChild($child, $out); } else { // Sneaky stuff, don't let non scss file in. debugging("Can't import scss file - " . $path, DEBUG_DEVELOPER); } } break; default: return parent::compileChild($child, $out); } } /** * Is the given file valid for import ? * * @param $path * @return bool */ protected function is_valid_file($path) { global $CFG; $realpath = realpath($path); // Additional theme directory. $addthemedirectory = core_component::get_plugin_types()['theme']; $addrealroot = realpath($addthemedirectory); // Original theme directory. $themedirectory = $CFG->dirroot . "/theme"; $realroot = realpath($themedirectory); // File should end in .scss and must be in sites theme directory, else ignore it. $pathvalid = $realpath !== false; $pathvalid = $pathvalid && (substr($path, -5) === '.scss'); $pathvalid = $pathvalid && (strpos($realpath, $realroot) === 0 || strpos($realpath, $addrealroot) === 0); return $pathvalid; } }