init

lib/PdfParser/Encoding.php

@@ -0,0 +1,142 @@
+<?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;
+
+use Smalot\PdfParser\Element\ElementNumeric;
+
+/**
+ * Class Encoding
+ *
+ * @package Smalot\PdfParser
+ */
+class Encoding extends Object
+{
+    /**
+     * @var array
+     */
+    protected $encoding;
+
+    /**
+     * @var array
+     */
+    protected $differences;
+
+    /**
+     * @var array
+     */
+    protected $mapping;
+
+    /**
+     *
+     */
+    public function init()
+    {
+        $this->mapping     = array();
+        $this->differences = array();
+        $this->encoding    = null;
+
+        if ($this->has('BaseEncoding')) {
+            // Load reference table charset.
+            $baseEncoding = preg_replace('/[^A-Z0-9]/is', '', $this->get('BaseEncoding')->getContent());
+            $className    = '\\Smalot\\PdfParser\\Encoding\\' . $baseEncoding;
+
+            if (class_exists($className)) {
+                $class = new $className();
+                $this->encoding = $class->getTranslations();
+            } else {
+                throw new \Exception('Missing encoding data for: "' . $baseEncoding . '".');
+            }
+
+            // Build table including differences.
+            $differences = $this->get('Differences')->getContent();
+            $code        = 0;
+
+            if (!is_array($differences)) {
+                return;
+            }
+
+            foreach ($differences as $difference) {
+                /** @var ElementNumeric $difference */
+                if ($difference instanceof ElementNumeric) {
+                    $code = $difference->getContent();
+                    continue;
+                }
+
+                // ElementName
+                if (is_object($difference)) {
+                    $this->differences[$code] = $difference->getContent();
+                } else {
+                    $this->differences[$code] = $difference;
+                }
+
+                // For the next char.
+                $code++;
+            }
+
+            // Build final mapping (custom => standard).
+            $table = array_flip(array_reverse($this->encoding, true));
+
+            foreach ($this->differences as $code => $difference) {
+                /** @var string $difference */
+                $this->mapping[$code] = (isset($table[$difference]) ? $table[$difference] : Font::MISSING);
+            }
+        }
+    }
+
+    /**
+     * @return array
+     */
+    public function getDetails($deep = true)
+    {
+        $details = array();
+
+        $details['BaseEncoding'] = ($this->has('BaseEncoding') ? (string)$this->get('BaseEncoding') : 'Ansi');
+        $details['Differences']  = ($this->has('Differences') ? (string)$this->get('Differences') : '');
+
+        $details += parent::getDetails($deep);
+
+        return $details;
+    }
+
+    /**
+     * @param int $char
+     *
+     * @return int
+     */
+    public function translateChar($dec)
+    {
+        if (isset($this->mapping[$dec])) {
+            $dec = $this->mapping[$dec];
+        }
+
+        return $dec;
+    }
+}