Viewing file:  Encoding.php (4.61 KB) -rw-rw-rw-
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
<?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;
use Smalot\PdfParser\Encoding\EncodingLocator;
use Smalot\PdfParser\Encoding\PostScriptGlyphs;
use Smalot\PdfParser\Exception\EncodingNotFoundException;
/**
* Class Encoding
*/
class Encoding extends PDFObject
{
/**
* @var array
*/
protected $encoding;
/**
* @var array
*/
protected $differences;
/**
* @var array
*/
protected $mapping;
public function init()
{
$this->mapping = [];
$this->differences = [];
$this->encoding = [];
if ($this->has('BaseEncoding')) {
$this->encoding = EncodingLocator::getEncoding($this->getEncodingClass())->getTranslations();
// 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
$this->differences[$code] = $difference;
if (\is_object($difference)) {
$this->differences[$code] = $difference->getContent();
}
// For the next char.
++$code;
}
$this->mapping = $this->encoding;
foreach ($this->differences as $code => $difference) {
/* @var string $difference */
$this->mapping[$code] = $difference;
}
}
}
public function getDetails(bool $deep = true): array
{
$details = [];
$details['BaseEncoding'] = ($this->has('BaseEncoding') ? (string) $this->get('BaseEncoding') : 'Ansi');
$details['Differences'] = ($this->has('Differences') ? (string) $this->get('Differences') : '');
$details += parent::getDetails($deep);
return $details;
}
public function translateChar($dec): ?int
{
if (isset($this->mapping[$dec])) {
$dec = $this->mapping[$dec];
}
return PostScriptGlyphs::getCodePoint($dec);
}
/**
* Returns encoding class name if available or empty string (only prior PHP 7.4).
*
* @throws \Exception On PHP 7.4+ an exception is thrown if encoding class doesn't exist.
*/
public function __toString(): string
{
try {
return $this->getEncodingClass();
} catch (\Exception $e) {
// prior to PHP 7.4 toString has to return an empty string.
if (version_compare(\PHP_VERSION, '7.4.0', '<')) {
return '';
}
throw $e;
}
}
/**
* @throws EncodingNotFoundException
*/
protected function getEncodingClass(): string
{
// Load reference table charset.
$baseEncoding = preg_replace('/[^A-Z0-9]/is', '', $this->get('BaseEncoding')->getContent());
// Check for empty BaseEncoding field value
if (!\is_string($baseEncoding) || 0 == \strlen($baseEncoding)) {
$baseEncoding = 'StandardEncoding';
}
$className = '\\Smalot\\PdfParser\\Encoding\\'.$baseEncoding;
if (!class_exists($className)) {
throw new EncodingNotFoundException('Missing encoding data for: "'.$baseEncoding.'".');
}
return $className;
}
}
|