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efrain |
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<?php
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// This file is part of Moodle - http://moodle.org/
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Moodle is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
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/**
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* JS and CSS compression.
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*
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* @package core
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* @copyright 2013 Petr Skoda {@link http://skodak.org}
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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defined('MOODLE_INTERNAL') || die();
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/**
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* Collection of JS and CSS compression methods.
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*/
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class core_minify {
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/**
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* Minify JS code.
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*
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* @param string $content
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* @return string minified JS code
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*/
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public static function js($content) {
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try {
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$minifier = new MatthiasMullie\Minify\JS($content);
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return $minifier->minify();
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} catch (Exception $e) {
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ob_end_clean();
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$error = $e->getMessage();
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}
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$return = <<<EOD
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try {console.log('Error: Minimisation of JavaScript failed!');} catch (e) {}
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// Error: $error
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// Problem detected during JavaScript minimisation, please review the following code
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// =================================================================================
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EOD;
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return $return.$content;
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}
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/**
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* Minify JS files.
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*
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* @param array $files
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* @return string minified JS code
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*/
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public static function js_files(array $files) {
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if (empty($files)) {
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return '';
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}
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$compressed = array();
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foreach ($files as $file) {
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$content = file_get_contents($file);
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if ($content === false) {
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$compressed[] = "\n\n// Cannot read JS file ".basename(dirname(dirname($file))).'/'.basename(dirname($file)).'/'.basename($file)."\n\n";
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continue;
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}
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$compressed[] = self::js($content);
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}
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return implode(";\n", $compressed);
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}
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/**
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* Minify CSS code.
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*
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* @param string $content
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* @return string minified CSS
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*/
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public static function css($content) {
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$error = 'unknown';
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try {
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$minifier = new MatthiasMullie\Minify\CSS($content);
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return $minifier->minify();
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} catch (Exception $e) {
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$error = $e->getMessage();
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}
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$return = <<<EOD
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/* Error: $error */
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/* Problem detected during CSS minimisation, please review the following code */
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/* ========================================================================== */
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EOD;
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return $return.$content;
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}
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/**
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* Minify CSS files.
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*
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* @param array $files
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* @return string minified CSS code
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*/
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public static function css_files(array $files) {
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if (empty($files)) {
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return '';
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}
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$compressed = array();
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foreach ($files as $file) {
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$content = file_get_contents($file);
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if ($content === false) {
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$compressed[] = "\n\n/* Cannot read CSS file ".basename(dirname(dirname($file))).'/'.basename(dirname($file)).'/'.basename($file)."*/\n\n";
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continue;
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}
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$compressed[] = self::css($content);
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}
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return implode("\n", $compressed);
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}
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}
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