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lib/PdfParser/Element/ElementHexa.php

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+<?php
+
+/**
+ * @file
+ *          This file is part of the PdfParser library.
+ *
+ * @author  Sébastien MALOT <sebastien@malot.fr>
+ * @date    2017-01-03
+ * @license LGPLv3
+ * @url     <https://github.com/smalot/pdfparser>
+ *
+ *  PdfParser is a pdf library written in PHP, extraction oriented.
+ *  Copyright (C) 2017 - Sébastien MALOT <sebastien@malot.fr>
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU Lesser General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program 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 Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public License
+ *  along with this program.
+ *  If not, see <http://www.pdfparser.org/sites/default/LICENSE.txt>.
+ *
+ */
+
+namespace Smalot\PdfParser\Element;
+
+use Smalot\PdfParser\Document;
+
+/**
+ * Class ElementHexa
+ *
+ * @package Smalot\PdfParser\Element
+ */
+class ElementHexa extends ElementString
+{
+    /**
+     * @param string   $content
+     * @param Document $document
+     * @param int      $offset
+     *
+     * @return bool|ElementHexa
+     */
+    public static function parse($content, Document $document = null, &$offset = 0)
+    {
+        if (preg_match('/^\s*\<(?P<name>[A-F0-9]+)\>/is', $content, $match)) {
+            $name    = $match['name'];
+            $offset += strpos($content, '<' . $name) + strlen($name) + 2; // 1 for '>'
+            // repackage string as standard
+            $name    = '(' . self::decode($name, $document) . ')';
+            $element = false;
+
+            if (!($element = ElementDate::parse($name, $document))) {
+                $element = ElementString::parse($name, $document);
+            }
+
+            return $element;
+        }
+
+        return false;
+    }
+
+    /**
+     * @param string   $value
+     * @param Document $document
+     */
+    public static function decode($value, Document $document = null)
+    {
+        $text   = '';
+        $length = strlen($value);
+
+        if (substr($value, 0, 2) == '00') {
+            for ($i = 0; $i < $length; $i += 4) {
+                $hex = substr($value, $i, 4);
+                $text .= '&#' . str_pad(hexdec($hex), 4, '0', STR_PAD_LEFT) . ';';
+            }
+        } else {
+            for ($i = 0; $i < $length; $i += 2) {
+                $hex = substr($value, $i, 2);
+                $text .= chr(hexdec($hex));
+            }
+        }
+
+        $text = html_entity_decode($text, ENT_NOQUOTES, 'UTF-8');
+
+        return $text;
+    }
+}