admin/cli/svgtool.php

   1 <?php
   2 // This file is part of Moodle - http://moodle.org/
   3 //
   4 // Moodle is free software: you can redistribute it and/or modify
   5 // it under the terms of the GNU General Public License as published by
   6 // the Free Software Foundation, either version 3 of the License, or
   7 // (at your option) any later version.
   8 //
   9 // Moodle is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13 //
  14 // You should have received a copy of the GNU General Public License
  15 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  16
  17 /**
  18  * This script implements some useful svg manipulation tricks.
  19  *
  20  * @package    core_admin
  21  * @subpackage cli
  22  * @copyright  2012 Petr Skoda {@link http://skodak.org}
  23  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  24  */
  25
  26 define('CLI_SCRIPT', true);
  27
  28 require(__DIR__.'/../../config.php');
  29 require_once($CFG->libdir.'/clilib.php');
  30
  31 // Now get cli options.
  32 list($options, $unrecognized) = cli_get_params(array('help'=>false, 'ie9fix'=>false, 'noaspectratio'=>false, 'path'=>$CFG->dirroot),
  33     array('h'=>'help'));
  34
  35 if ($unrecognized) {
  36     $unrecognized = implode("\n  ", $unrecognized);
  37     cli_error(get_string('cliunknowoption', 'admin', $unrecognized));
  38 }
  39
  40 // If necessary add files that should be ignored - such as in 3rd party plugins.
  41 $blacklist = array();
  42 $path = $options['path'];
  43 if (!file_exists($path)) {
  44     cli_error("Invalid path $path");
  45 }
  46
  47 if ($options['ie9fix']) {
  48     core_admin_recurse_svgs($path, '', 'core_admin_svgtool_ie9fix', $blacklist);
  49
  50 } else if ($options['noaspectratio']) {
  51     core_admin_recurse_svgs($path, '', 'core_admin_svgtool_noaspectratio', $blacklist);
  52
  53 } else {
  54     $help =
  55         "Some svg image tweaks for icon designers.
  56
  57 Options:
  58
  59 -h, --help            Print out this help
  60 --ie9fix              Adds preserveAspectRatio=\"xMinYMid meet\" to every svg image
  61 --noaspectratio       Removes preserveAspectRatio from svg files
  62 --path=PATH           Path to directory or file to be converted, by default \$CFG->dirroot
  63
  64 Examples:
  65 \$ php svgtool.php --ie9fix
  66 \$ php svgtool.php --ie9fix --path=../../../pix
  67 \$ php svgtool.php --noaspectratio
  68 ";
  69
  70     echo $help;
  71     die;
  72 }
  73
  74 exit(0);
  75
  76 /**
  77  * Fixes SVG images for IE9.
  78  *
  79  * @param string $file
  80  */
  81 function core_admin_svgtool_ie9fix($file) {
  82     global $CFG;
  83
  84     if (strpos($file, $CFG->dirroot.DIRECTORY_SEPARATOR) === 0) {
  85         $relfile = substr($file, strlen($CFG->dirroot));
  86     } else {
  87         $relfile = $file;
  88     }
  89
  90     $content = file_get_contents($file);
  91
  92     if (!preg_match('/<svg\s[^>]*>/', $content, $matches)) {
  93         echo "  skipping $relfile (invalid format)\n";
  94         return;
  95     }
  96     $svg = $matches[0];
  97     if (strpos($svg, 'preserveAspectRatio') !== false) {
  98         return;
  99     }
 100
 101     if (!is_writable($file)) {
 102         echo "  skipping $relfile (can not modify file)\n";
 103         return;
 104     }
 105
 106     $newsvg = rtrim($svg, '>').' preserveAspectRatio="xMinYMid meet">';
 107
 108     $content = str_replace($svg, $newsvg, $content);
 109     echo "converting $relfile\n";
 110     file_put_contents($file, $content);
 111 }
 112
 113 /**
 114  * Removes preserveAspectRatio attributes from SVG images.
 115  *
 116  * @param string $file
 117  */
 118 function core_admin_svgtool_noaspectratio($file) {
 119     global $CFG;
 120
 121     if (strpos($file, $CFG->dirroot.DIRECTORY_SEPARATOR) === 0) {
 122         $relfile = substr($file, strlen($CFG->dirroot));
 123     } else {
 124         $relfile = $file;
 125     }
 126
 127     $content = file_get_contents($file);
 128
 129     if (!preg_match('/<svg\s[^>]*>/', $content, $matches)) {
 130         echo "  skipping $relfile (invalid format)\n";
 131         return;
 132     }
 133     $svg = $matches[0];
 134     if (strpos($svg, 'preserveAspectRatio="xMinYMid meet"') === false) {
 135         return;
 136     }
 137
 138     if (!is_writable($file)) {
 139         echo "  skipping $relfile (can not modify file)\n";
 140         return;
 141     }
 142
 143     $newsvg = preg_replace('/ ?preserveAspectRatio="xMinYMid meet"/', '', $svg);
 144
 145     $content = str_replace($svg, $newsvg, $content);
 146     echo "resetting $relfile\n";
 147     file_put_contents($file, $content);
 148 }
 149
 150 /**
 151  * Recursively works through directories of this theme, finding and fixing SVG images.
 152  *
 153  * @param string $base
 154  * @param string $sub
 155  * @param string $filecallback
 156  * @param array $blacklist
 157  */
 158 function core_admin_recurse_svgs($base, $sub, $filecallback, $blacklist) {
 159     if (is_dir("$base/$sub")) {
 160         $items = new DirectoryIterator("$base/$sub");
 161         foreach ($items as $item) {
 162             if ($item->isDot()) {
 163                 continue;
 164             }
 165             $file = $item->getFilename();
 166             core_admin_recurse_svgs("$base/$sub", $file, $filecallback, $blacklist);
 167         }
 168         unset($item);
 169         unset($items);
 170         return;
 171
 172     } else if (is_file("$base/$sub")) {
 173         if (substr($sub, -4) !== '.svg') {
 174             return;
 175         }
 176         $file = realpath("$base/$sub");
 177         if (in_array($file, $blacklist)) {
 178             return;
 179         }
 180         $filecallback($file);
 181     }
 182 }