From 741797453bddb7691981bf8ff38ddb294384688b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Petr=20S=CC=8Ckoda?= <commits@skodak.org>
Date: Wed, 14 Nov 2012 22:21:18 +0100
Subject: [PATCH] MDL-36436 add simple svg hacking tool for icon designers

This should solve some IE9 issues with icon cut-off.
---
 theme/base/cli/svgtool.php | 165 +++++++++++++++++++++++++++++++++++++
 1 file changed, 165 insertions(+)
 create mode 100644 theme/base/cli/svgtool.php

diff --git a/theme/base/cli/svgtool.php b/theme/base/cli/svgtool.php
new file mode 100644
index 00000000000..a40f8cd2a18
--- /dev/null
+++ b/theme/base/cli/svgtool.php
@@ -0,0 +1,165 @@
+<?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/>.
+
+/**
+ * This script implements some useful svg manipulation tricks.
+ *
+ * @package    theme_base
+ * @subpackage cli
+ * @copyright  2012 Petr Skoda {@link http://skodak.org}
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+define('CLI_SCRIPT', true);
+
+require(__DIR__.'/../../../config.php');
+require_once($CFG->libdir.'/clilib.php');
+
+// Now get cli options.
+list($options, $unrecognized) = cli_get_params(array('help'=>false, 'ie9fix'=>false, 'noaspectratio'=>false, 'path'=>$CFG->dirroot),
+    array('h'=>'help'));
+
+if ($unrecognized) {
+    $unrecognized = implode("\n  ", $unrecognized);
+    cli_error(get_string('cliunknowoption', 'admin', $unrecognized));
+}
+
+// If necessary add files that should be ignored - such as in 3rd party plugins.
+$blacklist = array();
+$path = $options['path'];
+if (!file_exists($path)) {
+    cli_error("Invalid path $path");
+}
+
+if ($options['ie9fix']) {
+    theme_base_recurse_svgs($path, '', 'theme_base_svgtool_ie9fix', $blacklist);
+
+} else if ($options['noaspectratio']) {
+    theme_base_recurse_svgs($path, '', 'theme_base_svgtool_noaspectratio', $blacklist);
+
+} else {
+    $help =
+        "Some svg image tweaks for icon designers.
+
+Options:
+
+-h, --help            Print out this help
+--ie9fix              Adds preserveAspectRatio=\"xMinYMid meet\" to every svg image
+--noaspectratio       Removes preserveAspectRatio from svg files
+--path=PATH           Path to directory or file to be converted, by default \$CFG->dirroot
+
+Examples:
+\$ php svgtool.php --ie9fix
+\$ php svgtool.php --ie9fix --path=../../../pix
+\$ php svgtool.php --noaspectratio
+";
+
+    echo $help;
+    die;
+}
+
+exit(0);
+
+
+function theme_base_svgtool_ie9fix($file) {
+    global $CFG;
+
+    if (strpos($file, $CFG->dirroot.DIRECTORY_SEPARATOR) === 0) {
+        $relfile = substr($file, strlen($CFG->dirroot));
+    } else {
+        $relfile = $file;
+    }
+
+    $content = file_get_contents($file);
+
+    if (!preg_match('/<svg\s[^>]*>/', $content, $matches)) {
+        echo "  skipping $relfile (invalid format)\n";
+        return;
+    }
+    $svg = $matches[0];
+    if (strpos($svg, 'preserveAspectRatio') !== false) {
+        return;
+    }
+
+    if (!is_writable($file)) {
+        echo "  skipping $relfile (can not modify file)\n";
+        return;
+    }
+
+    $newsvg = rtrim($svg, '>').' preserveAspectRatio="xMinYMid meet">';
+
+    $content = str_replace($svg, $newsvg, $content);
+    echo "converting $relfile\n";
+    file_put_contents($file, $content);
+}
+
+function theme_base_svgtool_noaspectratio($file) {
+    global $CFG;
+
+    if (strpos($file, $CFG->dirroot.DIRECTORY_SEPARATOR) === 0) {
+        $relfile = substr($file, strlen($CFG->dirroot));
+    } else {
+        $relfile = $file;
+    }
+
+    $content = file_get_contents($file);
+
+    if (!preg_match('/<svg\s[^>]*>/', $content, $matches)) {
+        echo "  skipping $relfile (invalid format)\n";
+        return;
+    }
+    $svg = $matches[0];
+    if (strpos($svg, 'preserveAspectRatio="xMinYMid meet"') === false) {
+        return;
+    }
+
+    if (!is_writable($file)) {
+        echo "  skipping $relfile (can not modify file)\n";
+        return;
+    }
+
+    $newsvg = preg_replace('/ ?preserveAspectRatio="xMinYMid meet"/', '', $svg);
+
+    $content = str_replace($svg, $newsvg, $content);
+    echo "resetting $relfile\n";
+    file_put_contents($file, $content);
+}
+
+function theme_base_recurse_svgs($base, $sub, $filecallback, $blacklist) {
+    if (is_dir("$base/$sub")) {
+        $items = new DirectoryIterator("$base/$sub");
+        foreach ($items as $item) {
+            if ($item->isDot()) {
+                continue;
+            }
+            $file = $item->getFilename();
+            theme_base_recurse_svgs("$base/$sub", $file, $filecallback, $blacklist);
+        }
+        unset($item);
+        unset($items);
+        return;
+
+    } else if (is_file("$base/$sub")) {
+        if (substr($sub, -4) !== '.svg') {
+            return;
+        }
+        $file = realpath("$base/$sub");
+        if (in_array($file, $blacklist)) {
+            return;
+        }
+        $filecallback($file);
+    }
+}